/* Tree lowering pass. This pass converts the GENERIC functions-as-trees tree representation into the GIMPLE form. Copyright (C) 2002-2022 Free Software Foundation, Inc. Major work done by Sebastian Pop , Diego Novillo and Jason Merrill . This file is part of GCC. GCC is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3, or (at your option) any later version. GCC is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with GCC; see the file COPYING3. If not see . */ #include "config.h" #include "system.h" #include "coretypes.h" #include "backend.h" #include "target.h" #include "rtl.h" #include "tree.h" #include "memmodel.h" #include "tm_p.h" #include "gimple.h" #include "gimple-predict.h" #include "tree-pass.h" /* FIXME: only for PROP_gimple_any */ #include "ssa.h" #include "cgraph.h" #include "tree-pretty-print.h" #include "diagnostic-core.h" #include "alias.h" #include "fold-const.h" #include "calls.h" #include "varasm.h" #include "stmt.h" #include "expr.h" #include "gimple-fold.h" #include "tree-eh.h" #include "gimplify.h" #include "gimple-iterator.h" #include "stor-layout.h" #include "print-tree.h" #include "tree-iterator.h" #include "tree-inline.h" #include "langhooks.h" #include "tree-cfg.h" #include "tree-ssa.h" #include "tree-hash-traits.h" #include "omp-general.h" #include "omp-low.h" #include "gimple-low.h" #include "gomp-constants.h" #include "splay-tree.h" #include "gimple-walk.h" #include "langhooks-def.h" /* FIXME: for lhd_set_decl_assembler_name */ #include "builtins.h" #include "stringpool.h" #include "attribs.h" #include "asan.h" #include "dbgcnt.h" #include "omp-offload.h" #include "context.h" #include "tree-nested.h" /* Hash set of poisoned variables in a bind expr. */ static hash_set *asan_poisoned_variables = NULL; enum gimplify_omp_var_data { GOVD_SEEN = 0x000001, GOVD_EXPLICIT = 0x000002, GOVD_SHARED = 0x000004, GOVD_PRIVATE = 0x000008, GOVD_FIRSTPRIVATE = 0x000010, GOVD_LASTPRIVATE = 0x000020, GOVD_REDUCTION = 0x000040, GOVD_LOCAL = 0x00080, GOVD_MAP = 0x000100, GOVD_DEBUG_PRIVATE = 0x000200, GOVD_PRIVATE_OUTER_REF = 0x000400, GOVD_LINEAR = 0x000800, GOVD_ALIGNED = 0x001000, /* Flag for GOVD_MAP: don't copy back. */ GOVD_MAP_TO_ONLY = 0x002000, /* Flag for GOVD_LINEAR or GOVD_LASTPRIVATE: no outer reference. */ GOVD_LINEAR_LASTPRIVATE_NO_OUTER = 0x004000, GOVD_MAP_0LEN_ARRAY = 0x008000, /* Flag for GOVD_MAP, if it is always, to or always, tofrom mapping. */ GOVD_MAP_ALWAYS_TO = 0x010000, /* Flag for shared vars that are or might be stored to in the region. */ GOVD_WRITTEN = 0x020000, /* Flag for GOVD_MAP, if it is a forced mapping. */ GOVD_MAP_FORCE = 0x040000, /* Flag for GOVD_MAP: must be present already. */ GOVD_MAP_FORCE_PRESENT = 0x080000, /* Flag for GOVD_MAP: only allocate. */ GOVD_MAP_ALLOC_ONLY = 0x100000, /* Flag for GOVD_MAP: only copy back. */ GOVD_MAP_FROM_ONLY = 0x200000, GOVD_NONTEMPORAL = 0x400000, /* Flag for GOVD_LASTPRIVATE: conditional modifier. */ GOVD_LASTPRIVATE_CONDITIONAL = 0x800000, GOVD_CONDTEMP = 0x1000000, /* Flag for GOVD_REDUCTION: inscan seen in {in,ex}clusive clause. */ GOVD_REDUCTION_INSCAN = 0x2000000, /* Flag for GOVD_MAP: (struct) vars that have pointer attachments for fields. */ GOVD_MAP_HAS_ATTACHMENTS = 0x4000000, /* Flag for GOVD_FIRSTPRIVATE: OMP_CLAUSE_FIRSTPRIVATE_IMPLICIT. */ GOVD_FIRSTPRIVATE_IMPLICIT = 0x8000000, GOVD_DATA_SHARE_CLASS = (GOVD_SHARED | GOVD_PRIVATE | GOVD_FIRSTPRIVATE | GOVD_LASTPRIVATE | GOVD_REDUCTION | GOVD_LINEAR | GOVD_LOCAL) }; enum omp_region_type { ORT_WORKSHARE = 0x00, ORT_TASKGROUP = 0x01, ORT_SIMD = 0x04, ORT_PARALLEL = 0x08, ORT_COMBINED_PARALLEL = ORT_PARALLEL | 1, ORT_TASK = 0x10, ORT_UNTIED_TASK = ORT_TASK | 1, ORT_TASKLOOP = ORT_TASK | 2, ORT_UNTIED_TASKLOOP = ORT_UNTIED_TASK | 2, ORT_TEAMS = 0x20, ORT_COMBINED_TEAMS = ORT_TEAMS | 1, ORT_HOST_TEAMS = ORT_TEAMS | 2, ORT_COMBINED_HOST_TEAMS = ORT_COMBINED_TEAMS | 2, /* Data region. */ ORT_TARGET_DATA = 0x40, /* Data region with offloading. */ ORT_TARGET = 0x80, ORT_COMBINED_TARGET = ORT_TARGET | 1, ORT_IMPLICIT_TARGET = ORT_TARGET | 2, /* OpenACC variants. */ ORT_ACC = 0x100, /* A generic OpenACC region. */ ORT_ACC_DATA = ORT_ACC | ORT_TARGET_DATA, /* Data construct. */ ORT_ACC_PARALLEL = ORT_ACC | ORT_TARGET, /* Parallel construct */ ORT_ACC_KERNELS = ORT_ACC | ORT_TARGET | 2, /* Kernels construct. */ ORT_ACC_SERIAL = ORT_ACC | ORT_TARGET | 4, /* Serial construct. */ ORT_ACC_HOST_DATA = ORT_ACC | ORT_TARGET_DATA | 2, /* Host data. */ /* Dummy OpenMP region, used to disable expansion of DECL_VALUE_EXPRs in taskloop pre body. */ ORT_NONE = 0x200 }; /* Gimplify hashtable helper. */ struct gimplify_hasher : free_ptr_hash { static inline hashval_t hash (const elt_t *); static inline bool equal (const elt_t *, const elt_t *); }; struct gimplify_ctx { struct gimplify_ctx *prev_context; vec bind_expr_stack; tree temps; gimple_seq conditional_cleanups; tree exit_label; tree return_temp; vec case_labels; hash_set *live_switch_vars; /* The formal temporary table. Should this be persistent? */ hash_table *temp_htab; int conditions; unsigned into_ssa : 1; unsigned allow_rhs_cond_expr : 1; unsigned in_cleanup_point_expr : 1; unsigned keep_stack : 1; unsigned save_stack : 1; unsigned in_switch_expr : 1; }; enum gimplify_defaultmap_kind { GDMK_SCALAR, GDMK_SCALAR_TARGET, /* w/ Fortran's target attr, implicit mapping, only. */ GDMK_AGGREGATE, GDMK_ALLOCATABLE, GDMK_POINTER }; struct gimplify_omp_ctx { struct gimplify_omp_ctx *outer_context; splay_tree variables; hash_set *privatized_types; tree clauses; /* Iteration variables in an OMP_FOR. */ vec loop_iter_var; location_t location; enum omp_clause_default_kind default_kind; enum omp_region_type region_type; enum tree_code code; bool combined_loop; bool distribute; bool target_firstprivatize_array_bases; bool add_safelen1; bool order_concurrent; bool has_depend; bool in_for_exprs; int defaultmap[5]; }; static struct gimplify_ctx *gimplify_ctxp; static struct gimplify_omp_ctx *gimplify_omp_ctxp; static bool in_omp_construct; /* Forward declaration. */ static enum gimplify_status gimplify_compound_expr (tree *, gimple_seq *, bool); static hash_map *oacc_declare_returns; static enum gimplify_status gimplify_expr (tree *, gimple_seq *, gimple_seq *, bool (*) (tree), fallback_t, bool); static void prepare_gimple_addressable (tree *, gimple_seq *); /* Shorter alias name for the above function for use in gimplify.cc only. */ static inline void gimplify_seq_add_stmt (gimple_seq *seq_p, gimple *gs) { gimple_seq_add_stmt_without_update (seq_p, gs); } /* Append sequence SRC to the end of sequence *DST_P. If *DST_P is NULL, a new sequence is allocated. This function is similar to gimple_seq_add_seq, but does not scan the operands. During gimplification, we need to manipulate statement sequences before the def/use vectors have been constructed. */ static void gimplify_seq_add_seq (gimple_seq *dst_p, gimple_seq src) { gimple_stmt_iterator si; if (src == NULL) return; si = gsi_last (*dst_p); gsi_insert_seq_after_without_update (&si, src, GSI_NEW_STMT); } /* Pointer to a list of allocated gimplify_ctx structs to be used for pushing and popping gimplify contexts. */ static struct gimplify_ctx *ctx_pool = NULL; /* Return a gimplify context struct from the pool. */ static inline struct gimplify_ctx * ctx_alloc (void) { struct gimplify_ctx * c = ctx_pool; if (c) ctx_pool = c->prev_context; else c = XNEW (struct gimplify_ctx); memset (c, '\0', sizeof (*c)); return c; } /* Put gimplify context C back into the pool. */ static inline void ctx_free (struct gimplify_ctx *c) { c->prev_context = ctx_pool; ctx_pool = c; } /* Free allocated ctx stack memory. */ void free_gimplify_stack (void) { struct gimplify_ctx *c; while ((c = ctx_pool)) { ctx_pool = c->prev_context; free (c); } } /* Set up a context for the gimplifier. */ void push_gimplify_context (bool in_ssa, bool rhs_cond_ok) { struct gimplify_ctx *c = ctx_alloc (); c->prev_context = gimplify_ctxp; gimplify_ctxp = c; gimplify_ctxp->into_ssa = in_ssa; gimplify_ctxp->allow_rhs_cond_expr = rhs_cond_ok; } /* Tear down a context for the gimplifier. If BODY is non-null, then put the temporaries into the outer BIND_EXPR. Otherwise, put them in the local_decls. BODY is not a sequence, but the first tuple in a sequence. */ void pop_gimplify_context (gimple *body) { struct gimplify_ctx *c = gimplify_ctxp; gcc_assert (c && (!c->bind_expr_stack.exists () || c->bind_expr_stack.is_empty ())); c->bind_expr_stack.release (); gimplify_ctxp = c->prev_context; if (body) declare_vars (c->temps, body, false); else record_vars (c->temps); delete c->temp_htab; c->temp_htab = NULL; ctx_free (c); } /* Push a GIMPLE_BIND tuple onto the stack of bindings. */ static void gimple_push_bind_expr (gbind *bind_stmt) { gimplify_ctxp->bind_expr_stack.reserve (8); gimplify_ctxp->bind_expr_stack.safe_push (bind_stmt); } /* Pop the first element off the stack of bindings. */ static void gimple_pop_bind_expr (void) { gimplify_ctxp->bind_expr_stack.pop (); } /* Return the first element of the stack of bindings. */ gbind * gimple_current_bind_expr (void) { return gimplify_ctxp->bind_expr_stack.last (); } /* Return the stack of bindings created during gimplification. */ vec gimple_bind_expr_stack (void) { return gimplify_ctxp->bind_expr_stack; } /* Return true iff there is a COND_EXPR between us and the innermost CLEANUP_POINT_EXPR. This info is used by gimple_push_cleanup. */ static bool gimple_conditional_context (void) { return gimplify_ctxp->conditions > 0; } /* Note that we've entered a COND_EXPR. */ static void gimple_push_condition (void) { #ifdef ENABLE_GIMPLE_CHECKING if (gimplify_ctxp->conditions == 0) gcc_assert (gimple_seq_empty_p (gimplify_ctxp->conditional_cleanups)); #endif ++(gimplify_ctxp->conditions); } /* Note that we've left a COND_EXPR. If we're back at unconditional scope now, add any conditional cleanups we've seen to the prequeue. */ static void gimple_pop_condition (gimple_seq *pre_p) { int conds = --(gimplify_ctxp->conditions); gcc_assert (conds >= 0); if (conds == 0) { gimplify_seq_add_seq (pre_p, gimplify_ctxp->conditional_cleanups); gimplify_ctxp->conditional_cleanups = NULL; } } /* A stable comparison routine for use with splay trees and DECLs. */ static int splay_tree_compare_decl_uid (splay_tree_key xa, splay_tree_key xb) { tree a = (tree) xa; tree b = (tree) xb; return DECL_UID (a) - DECL_UID (b); } /* Create a new omp construct that deals with variable remapping. */ static struct gimplify_omp_ctx * new_omp_context (enum omp_region_type region_type) { struct gimplify_omp_ctx *c; c = XCNEW (struct gimplify_omp_ctx); c->outer_context = gimplify_omp_ctxp; c->variables = splay_tree_new (splay_tree_compare_decl_uid, 0, 0); c->privatized_types = new hash_set; c->location = input_location; c->region_type = region_type; if ((region_type & ORT_TASK) == 0) c->default_kind = OMP_CLAUSE_DEFAULT_SHARED; else c->default_kind = OMP_CLAUSE_DEFAULT_UNSPECIFIED; c->defaultmap[GDMK_SCALAR] = GOVD_MAP; c->defaultmap[GDMK_SCALAR_TARGET] = GOVD_MAP; c->defaultmap[GDMK_AGGREGATE] = GOVD_MAP; c->defaultmap[GDMK_ALLOCATABLE] = GOVD_MAP; c->defaultmap[GDMK_POINTER] = GOVD_MAP; return c; } /* Destroy an omp construct that deals with variable remapping. */ static void delete_omp_context (struct gimplify_omp_ctx *c) { splay_tree_delete (c->variables); delete c->privatized_types; c->loop_iter_var.release (); XDELETE (c); } static void omp_add_variable (struct gimplify_omp_ctx *, tree, unsigned int); static bool omp_notice_variable (struct gimplify_omp_ctx *, tree, bool); /* Both gimplify the statement T and append it to *SEQ_P. This function behaves exactly as gimplify_stmt, but you don't have to pass T as a reference. */ void gimplify_and_add (tree t, gimple_seq *seq_p) { gimplify_stmt (&t, seq_p); } /* Gimplify statement T into sequence *SEQ_P, and return the first tuple in the sequence of generated tuples for this statement. Return NULL if gimplifying T produced no tuples. */ static gimple * gimplify_and_return_first (tree t, gimple_seq *seq_p) { gimple_stmt_iterator last = gsi_last (*seq_p); gimplify_and_add (t, seq_p); if (!gsi_end_p (last)) { gsi_next (&last); return gsi_stmt (last); } else return gimple_seq_first_stmt (*seq_p); } /* Returns true iff T is a valid RHS for an assignment to an un-renamed LHS, or for a call argument. */ static bool is_gimple_mem_rhs (tree t) { /* If we're dealing with a renamable type, either source or dest must be a renamed variable. */ if (is_gimple_reg_type (TREE_TYPE (t))) return is_gimple_val (t); else return is_gimple_val (t) || is_gimple_lvalue (t); } /* Return true if T is a CALL_EXPR or an expression that can be assigned to a temporary. Note that this predicate should only be used during gimplification. See the rationale for this in gimplify_modify_expr. */ static bool is_gimple_reg_rhs_or_call (tree t) { return (get_gimple_rhs_class (TREE_CODE (t)) != GIMPLE_INVALID_RHS || TREE_CODE (t) == CALL_EXPR); } /* Return true if T is a valid memory RHS or a CALL_EXPR. Note that this predicate should only be used during gimplification. See the rationale for this in gimplify_modify_expr. */ static bool is_gimple_mem_rhs_or_call (tree t) { /* If we're dealing with a renamable type, either source or dest must be a renamed variable. */ if (is_gimple_reg_type (TREE_TYPE (t))) return is_gimple_val (t); else return (is_gimple_val (t) || is_gimple_lvalue (t) || TREE_CLOBBER_P (t) || TREE_CODE (t) == CALL_EXPR); } /* Create a temporary with a name derived from VAL. Subroutine of lookup_tmp_var; nobody else should call this function. */ static inline tree create_tmp_from_val (tree val) { /* Drop all qualifiers and address-space information from the value type. */ tree type = TYPE_MAIN_VARIANT (TREE_TYPE (val)); tree var = create_tmp_var (type, get_name (val)); return var; } /* Create a temporary to hold the value of VAL. If IS_FORMAL, try to reuse an existing expression temporary. */ static tree lookup_tmp_var (tree val, bool is_formal) { tree ret; /* If not optimizing, never really reuse a temporary. local-alloc won't allocate any variable that is used in more than one basic block, which means it will go into memory, causing much extra work in reload and final and poorer code generation, outweighing the extra memory allocation here. */ if (!optimize || !is_formal || TREE_SIDE_EFFECTS (val)) ret = create_tmp_from_val (val); else { elt_t elt, *elt_p; elt_t **slot; elt.val = val; if (!gimplify_ctxp->temp_htab) gimplify_ctxp->temp_htab = new hash_table (1000); slot = gimplify_ctxp->temp_htab->find_slot (&elt, INSERT); if (*slot == NULL) { elt_p = XNEW (elt_t); elt_p->val = val; elt_p->temp = ret = create_tmp_from_val (val); *slot = elt_p; } else { elt_p = *slot; ret = elt_p->temp; } } return ret; } /* Helper for get_formal_tmp_var and get_initialized_tmp_var. */ static tree internal_get_tmp_var (tree val, gimple_seq *pre_p, gimple_seq *post_p, bool is_formal, bool allow_ssa) { tree t, mod; /* Notice that we explicitly allow VAL to be a CALL_EXPR so that we can create an INIT_EXPR and convert it into a GIMPLE_CALL below. */ gimplify_expr (&val, pre_p, post_p, is_gimple_reg_rhs_or_call, fb_rvalue); if (allow_ssa && gimplify_ctxp->into_ssa && is_gimple_reg_type (TREE_TYPE (val))) { t = make_ssa_name (TYPE_MAIN_VARIANT (TREE_TYPE (val))); if (! gimple_in_ssa_p (cfun)) { const char *name = get_name (val); if (name) SET_SSA_NAME_VAR_OR_IDENTIFIER (t, create_tmp_var_name (name)); } } else t = lookup_tmp_var (val, is_formal); mod = build2 (INIT_EXPR, TREE_TYPE (t), t, unshare_expr (val)); SET_EXPR_LOCATION (mod, EXPR_LOC_OR_LOC (val, input_location)); /* gimplify_modify_expr might want to reduce this further. */ gimplify_and_add (mod, pre_p); ggc_free (mod); return t; } /* Return a formal temporary variable initialized with VAL. PRE_P is as in gimplify_expr. Only use this function if: 1) The value of the unfactored expression represented by VAL will not change between the initialization and use of the temporary, and 2) The temporary will not be otherwise modified. For instance, #1 means that this is inappropriate for SAVE_EXPR temps, and #2 means it is inappropriate for && temps. For other cases, use get_initialized_tmp_var instead. */ tree get_formal_tmp_var (tree val, gimple_seq *pre_p) { return internal_get_tmp_var (val, pre_p, NULL, true, true); } /* Return a temporary variable initialized with VAL. PRE_P and POST_P are as in gimplify_expr. */ tree get_initialized_tmp_var (tree val, gimple_seq *pre_p, gimple_seq *post_p /* = NULL */, bool allow_ssa /* = true */) { return internal_get_tmp_var (val, pre_p, post_p, false, allow_ssa); } /* Declare all the variables in VARS in SCOPE. If DEBUG_INFO is true, generate debug info for them; otherwise don't. */ void declare_vars (tree vars, gimple *gs, bool debug_info) { tree last = vars; if (last) { tree temps, block; gbind *scope = as_a (gs); temps = nreverse (last); block = gimple_bind_block (scope); gcc_assert (!block || TREE_CODE (block) == BLOCK); if (!block || !debug_info) { DECL_CHAIN (last) = gimple_bind_vars (scope); gimple_bind_set_vars (scope, temps); } else { /* We need to attach the nodes both to the BIND_EXPR and to its associated BLOCK for debugging purposes. The key point here is that the BLOCK_VARS of the BIND_EXPR_BLOCK of a BIND_EXPR is a subchain of the BIND_EXPR_VARS of the BIND_EXPR. */ if (BLOCK_VARS (block)) BLOCK_VARS (block) = chainon (BLOCK_VARS (block), temps); else { gimple_bind_set_vars (scope, chainon (gimple_bind_vars (scope), temps)); BLOCK_VARS (block) = temps; } } } } /* For VAR a VAR_DECL of variable size, try to find a constant upper bound for the size and adjust DECL_SIZE/DECL_SIZE_UNIT accordingly. Abort if no such upper bound can be obtained. */ static void force_constant_size (tree var) { /* The only attempt we make is by querying the maximum size of objects of the variable's type. */ HOST_WIDE_INT max_size; gcc_assert (VAR_P (var)); max_size = max_int_size_in_bytes (TREE_TYPE (var)); gcc_assert (max_size >= 0); DECL_SIZE_UNIT (var) = build_int_cst (TREE_TYPE (DECL_SIZE_UNIT (var)), max_size); DECL_SIZE (var) = build_int_cst (TREE_TYPE (DECL_SIZE (var)), max_size * BITS_PER_UNIT); } /* Push the temporary variable TMP into the current binding. */ void gimple_add_tmp_var_fn (struct function *fn, tree tmp) { gcc_assert (!DECL_CHAIN (tmp) && !DECL_SEEN_IN_BIND_EXPR_P (tmp)); /* Later processing assumes that the object size is constant, which might not be true at this point. Force the use of a constant upper bound in this case. */ if (!tree_fits_poly_uint64_p (DECL_SIZE_UNIT (tmp))) force_constant_size (tmp); DECL_CONTEXT (tmp) = fn->decl; DECL_SEEN_IN_BIND_EXPR_P (tmp) = 1; record_vars_into (tmp, fn->decl); } /* Push the temporary variable TMP into the current binding. */ void gimple_add_tmp_var (tree tmp) { gcc_assert (!DECL_CHAIN (tmp) && !DECL_SEEN_IN_BIND_EXPR_P (tmp)); /* Later processing assumes that the object size is constant, which might not be true at this point. Force the use of a constant upper bound in this case. */ if (!tree_fits_poly_uint64_p (DECL_SIZE_UNIT (tmp))) force_constant_size (tmp); DECL_CONTEXT (tmp) = current_function_decl; DECL_SEEN_IN_BIND_EXPR_P (tmp) = 1; if (gimplify_ctxp) { DECL_CHAIN (tmp) = gimplify_ctxp->temps; gimplify_ctxp->temps = tmp; /* Mark temporaries local within the nearest enclosing parallel. */ if (gimplify_omp_ctxp) { struct gimplify_omp_ctx *ctx = gimplify_omp_ctxp; int flag = GOVD_LOCAL | GOVD_SEEN; while (ctx && (ctx->region_type == ORT_WORKSHARE || ctx->region_type == ORT_TASKGROUP || ctx->region_type == ORT_SIMD || ctx->region_type == ORT_ACC)) { if (ctx->region_type == ORT_SIMD && TREE_ADDRESSABLE (tmp) && !TREE_STATIC (tmp)) { if (TREE_CODE (DECL_SIZE_UNIT (tmp)) != INTEGER_CST) ctx->add_safelen1 = true; else if (ctx->in_for_exprs) flag = GOVD_PRIVATE; else flag = GOVD_PRIVATE | GOVD_SEEN; break; } ctx = ctx->outer_context; } if (ctx) omp_add_variable (ctx, tmp, flag); } } else if (cfun) record_vars (tmp); else { gimple_seq body_seq; /* This case is for nested functions. We need to expose the locals they create. */ body_seq = gimple_body (current_function_decl); declare_vars (tmp, gimple_seq_first_stmt (body_seq), false); } } /* This page contains routines to unshare tree nodes, i.e. to duplicate tree nodes that are referenced more than once in GENERIC functions. This is necessary because gimplification (translation into GIMPLE) is performed by modifying tree nodes in-place, so gimplication of a shared node in a first context could generate an invalid GIMPLE form in a second context. This is achieved with a simple mark/copy/unmark algorithm that walks the GENERIC representation top-down, marks nodes with TREE_VISITED the first time it encounters them, duplicates them if they already have TREE_VISITED set, and finally removes the TREE_VISITED marks it has set. The algorithm works only at the function level, i.e. it generates a GENERIC representation of a function with no nodes shared within the function when passed a GENERIC function (except for nodes that are allowed to be shared). At the global level, it is also necessary to unshare tree nodes that are referenced in more than one function, for the same aforementioned reason. This requires some cooperation from the front-end. There are 2 strategies: 1. Manual unsharing. The front-end needs to call unshare_expr on every expression that might end up being shared across functions. 2. Deep unsharing. This is an extension of regular unsharing. Instead of calling unshare_expr on expressions that might be shared across functions, the front-end pre-marks them with TREE_VISITED. This will ensure that they are unshared on the first reference within functions when the regular unsharing algorithm runs. The counterpart is that this algorithm must look deeper than for manual unsharing, which is specified by LANG_HOOKS_DEEP_UNSHARING. If there are only few specific cases of node sharing across functions, it is probably easier for a front-end to unshare the expressions manually. On the contrary, if the expressions generated at the global level are as widespread as expressions generated within functions, deep unsharing is very likely the way to go. */ /* Similar to copy_tree_r but do not copy SAVE_EXPR or TARGET_EXPR nodes. These nodes model computations that must be done once. If we were to unshare something like SAVE_EXPR(i++), the gimplification process would create wrong code. However, if DATA is non-null, it must hold a pointer set that is used to unshare the subtrees of these nodes. */ static tree mostly_copy_tree_r (tree *tp, int *walk_subtrees, void *data) { tree t = *tp; enum tree_code code = TREE_CODE (t); /* Do not copy SAVE_EXPR, TARGET_EXPR or BIND_EXPR nodes themselves, but copy their subtrees if we can make sure to do it only once. */ if (code == SAVE_EXPR || code == TARGET_EXPR || code == BIND_EXPR) { if (data && !((hash_set *)data)->add (t)) ; else *walk_subtrees = 0; } /* Stop at types, decls, constants like copy_tree_r. */ else if (TREE_CODE_CLASS (code) == tcc_type || TREE_CODE_CLASS (code) == tcc_declaration || TREE_CODE_CLASS (code) == tcc_constant) *walk_subtrees = 0; /* Cope with the statement expression extension. */ else if (code == STATEMENT_LIST) ; /* Leave the bulk of the work to copy_tree_r itself. */ else copy_tree_r (tp, walk_subtrees, NULL); return NULL_TREE; } /* Callback for walk_tree to unshare most of the shared trees rooted at *TP. If *TP has been visited already, then *TP is deeply copied by calling mostly_copy_tree_r. DATA is passed to mostly_copy_tree_r unmodified. */ static tree copy_if_shared_r (tree *tp, int *walk_subtrees, void *data) { tree t = *tp; enum tree_code code = TREE_CODE (t); /* Skip types, decls, and constants. But we do want to look at their types and the bounds of types. Mark them as visited so we properly unmark their subtrees on the unmark pass. If we've already seen them, don't look down further. */ if (TREE_CODE_CLASS (code) == tcc_type || TREE_CODE_CLASS (code) == tcc_declaration || TREE_CODE_CLASS (code) == tcc_constant) { if (TREE_VISITED (t)) *walk_subtrees = 0; else TREE_VISITED (t) = 1; } /* If this node has been visited already, unshare it and don't look any deeper. */ else if (TREE_VISITED (t)) { walk_tree (tp, mostly_copy_tree_r, data, NULL); *walk_subtrees = 0; } /* Otherwise, mark the node as visited and keep looking. */ else TREE_VISITED (t) = 1; return NULL_TREE; } /* Unshare most of the shared trees rooted at *TP. DATA is passed to the copy_if_shared_r callback unmodified. */ void copy_if_shared (tree *tp, void *data) { walk_tree (tp, copy_if_shared_r, data, NULL); } /* Unshare all the trees in the body of FNDECL, as well as in the bodies of any nested functions. */ static void unshare_body (tree fndecl) { struct cgraph_node *cgn = cgraph_node::get (fndecl); /* If the language requires deep unsharing, we need a pointer set to make sure we don't repeatedly unshare subtrees of unshareable nodes. */ hash_set *visited = lang_hooks.deep_unsharing ? new hash_set : NULL; copy_if_shared (&DECL_SAVED_TREE (fndecl), visited); copy_if_shared (&DECL_SIZE (DECL_RESULT (fndecl)), visited); copy_if_shared (&DECL_SIZE_UNIT (DECL_RESULT (fndecl)), visited); delete visited; if (cgn) for (cgn = first_nested_function (cgn); cgn; cgn = next_nested_function (cgn)) unshare_body (cgn->decl); } /* Callback for walk_tree to unmark the visited trees rooted at *TP. Subtrees are walked until the first unvisited node is encountered. */ static tree unmark_visited_r (tree *tp, int *walk_subtrees, void *data ATTRIBUTE_UNUSED) { tree t = *tp; /* If this node has been visited, unmark it and keep looking. */ if (TREE_VISITED (t)) TREE_VISITED (t) = 0; /* Otherwise, don't look any deeper. */ else *walk_subtrees = 0; return NULL_TREE; } /* Unmark the visited trees rooted at *TP. */ static inline void unmark_visited (tree *tp) { walk_tree (tp, unmark_visited_r, NULL, NULL); } /* Likewise, but mark all trees as not visited. */ static void unvisit_body (tree fndecl) { struct cgraph_node *cgn = cgraph_node::get (fndecl); unmark_visited (&DECL_SAVED_TREE (fndecl)); unmark_visited (&DECL_SIZE (DECL_RESULT (fndecl))); unmark_visited (&DECL_SIZE_UNIT (DECL_RESULT (fndecl))); if (cgn) for (cgn = first_nested_function (cgn); cgn; cgn = next_nested_function (cgn)) unvisit_body (cgn->decl); } /* Unconditionally make an unshared copy of EXPR. This is used when using stored expressions which span multiple functions, such as BINFO_VTABLE, as the normal unsharing process can't tell that they're shared. */ tree unshare_expr (tree expr) { walk_tree (&expr, mostly_copy_tree_r, NULL, NULL); return expr; } /* Worker for unshare_expr_without_location. */ static tree prune_expr_location (tree *tp, int *walk_subtrees, void *) { if (EXPR_P (*tp)) SET_EXPR_LOCATION (*tp, UNKNOWN_LOCATION); else *walk_subtrees = 0; return NULL_TREE; } /* Similar to unshare_expr but also prune all expression locations from EXPR. */ tree unshare_expr_without_location (tree expr) { walk_tree (&expr, mostly_copy_tree_r, NULL, NULL); if (EXPR_P (expr)) walk_tree (&expr, prune_expr_location, NULL, NULL); return expr; } /* Return the EXPR_LOCATION of EXPR, if it (maybe recursively) has one, OR_ELSE otherwise. The location of a STATEMENT_LISTs comprising at least one DEBUG_BEGIN_STMT followed by exactly one EXPR is the location of the EXPR. */ static location_t rexpr_location (tree expr, location_t or_else = UNKNOWN_LOCATION) { if (!expr) return or_else; if (EXPR_HAS_LOCATION (expr)) return EXPR_LOCATION (expr); if (TREE_CODE (expr) != STATEMENT_LIST) return or_else; tree_stmt_iterator i = tsi_start (expr); bool found = false; while (!tsi_end_p (i) && TREE_CODE (tsi_stmt (i)) == DEBUG_BEGIN_STMT) { found = true; tsi_next (&i); } if (!found || !tsi_one_before_end_p (i)) return or_else; return rexpr_location (tsi_stmt (i), or_else); } /* Return TRUE iff EXPR (maybe recursively) has a location; see rexpr_location for the potential recursion. */ static inline bool rexpr_has_location (tree expr) { return rexpr_location (expr) != UNKNOWN_LOCATION; } /* WRAPPER is a code such as BIND_EXPR or CLEANUP_POINT_EXPR which can both contain statements and have a value. Assign its value to a temporary and give it void_type_node. Return the temporary, or NULL_TREE if WRAPPER was already void. */ tree voidify_wrapper_expr (tree wrapper, tree temp) { tree type = TREE_TYPE (wrapper); if (type && !VOID_TYPE_P (type)) { tree *p; /* Set p to point to the body of the wrapper. Loop until we find something that isn't a wrapper. */ for (p = &wrapper; p && *p; ) { switch (TREE_CODE (*p)) { case BIND_EXPR: TREE_SIDE_EFFECTS (*p) = 1; TREE_TYPE (*p) = void_type_node; /* For a BIND_EXPR, the body is operand 1. */ p = &BIND_EXPR_BODY (*p); break; case CLEANUP_POINT_EXPR: case TRY_FINALLY_EXPR: case TRY_CATCH_EXPR: TREE_SIDE_EFFECTS (*p) = 1; TREE_TYPE (*p) = void_type_node; p = &TREE_OPERAND (*p, 0); break; case STATEMENT_LIST: { tree_stmt_iterator i = tsi_last (*p); TREE_SIDE_EFFECTS (*p) = 1; TREE_TYPE (*p) = void_type_node; p = tsi_end_p (i) ? NULL : tsi_stmt_ptr (i); } break; case COMPOUND_EXPR: /* Advance to the last statement. Set all container types to void. */ for (; TREE_CODE (*p) == COMPOUND_EXPR; p = &TREE_OPERAND (*p, 1)) { TREE_SIDE_EFFECTS (*p) = 1; TREE_TYPE (*p) = void_type_node; } break; case TRANSACTION_EXPR: TREE_SIDE_EFFECTS (*p) = 1; TREE_TYPE (*p) = void_type_node; p = &TRANSACTION_EXPR_BODY (*p); break; default: /* Assume that any tree upon which voidify_wrapper_expr is directly called is a wrapper, and that its body is op0. */ if (p == &wrapper) { TREE_SIDE_EFFECTS (*p) = 1; TREE_TYPE (*p) = void_type_node; p = &TREE_OPERAND (*p, 0); break; } goto out; } } out: if (p == NULL || IS_EMPTY_STMT (*p)) temp = NULL_TREE; else if (temp) { /* The wrapper is on the RHS of an assignment that we're pushing down. */ gcc_assert (TREE_CODE (temp) == INIT_EXPR || TREE_CODE (temp) == MODIFY_EXPR); TREE_OPERAND (temp, 1) = *p; *p = temp; } else { temp = create_tmp_var (type, "retval"); *p = build2 (INIT_EXPR, type, temp, *p); } return temp; } return NULL_TREE; } /* Prepare calls to builtins to SAVE and RESTORE the stack as well as a temporary through which they communicate. */ static void build_stack_save_restore (gcall **save, gcall **restore) { tree tmp_var; *save = gimple_build_call (builtin_decl_implicit (BUILT_IN_STACK_SAVE), 0); tmp_var = create_tmp_var (ptr_type_node, "saved_stack"); gimple_call_set_lhs (*save, tmp_var); *restore = gimple_build_call (builtin_decl_implicit (BUILT_IN_STACK_RESTORE), 1, tmp_var); } /* Generate IFN_ASAN_MARK call that poisons shadow of a for DECL variable. */ static tree build_asan_poison_call_expr (tree decl) { /* Do not poison variables that have size equal to zero. */ tree unit_size = DECL_SIZE_UNIT (decl); if (zerop (unit_size)) return NULL_TREE; tree base = build_fold_addr_expr (decl); return build_call_expr_internal_loc (UNKNOWN_LOCATION, IFN_ASAN_MARK, void_type_node, 3, build_int_cst (integer_type_node, ASAN_MARK_POISON), base, unit_size); } /* Generate IFN_ASAN_MARK call that would poison or unpoison, depending on POISON flag, shadow memory of a DECL variable. The call will be put on location identified by IT iterator, where BEFORE flag drives position where the stmt will be put. */ static void asan_poison_variable (tree decl, bool poison, gimple_stmt_iterator *it, bool before) { tree unit_size = DECL_SIZE_UNIT (decl); tree base = build_fold_addr_expr (decl); /* Do not poison variables that have size equal to zero. */ if (zerop (unit_size)) return; /* It's necessary to have all stack variables aligned to ASAN granularity bytes. */ gcc_assert (!hwasan_sanitize_p () || hwasan_sanitize_stack_p ()); unsigned shadow_granularity = hwasan_sanitize_p () ? HWASAN_TAG_GRANULE_SIZE : ASAN_SHADOW_GRANULARITY; if (DECL_ALIGN_UNIT (decl) <= shadow_granularity) SET_DECL_ALIGN (decl, BITS_PER_UNIT * shadow_granularity); HOST_WIDE_INT flags = poison ? ASAN_MARK_POISON : ASAN_MARK_UNPOISON; gimple *g = gimple_build_call_internal (IFN_ASAN_MARK, 3, build_int_cst (integer_type_node, flags), base, unit_size); if (before) gsi_insert_before (it, g, GSI_NEW_STMT); else gsi_insert_after (it, g, GSI_NEW_STMT); } /* Generate IFN_ASAN_MARK internal call that depending on POISON flag either poisons or unpoisons a DECL. Created statement is appended to SEQ_P gimple sequence. */ static void asan_poison_variable (tree decl, bool poison, gimple_seq *seq_p) { gimple_stmt_iterator it = gsi_last (*seq_p); bool before = false; if (gsi_end_p (it)) before = true; asan_poison_variable (decl, poison, &it, before); } /* Sort pair of VAR_DECLs A and B by DECL_UID. */ static int sort_by_decl_uid (const void *a, const void *b) { const tree *t1 = (const tree *)a; const tree *t2 = (const tree *)b; int uid1 = DECL_UID (*t1); int uid2 = DECL_UID (*t2); if (uid1 < uid2) return -1; else if (uid1 > uid2) return 1; else return 0; } /* Generate IFN_ASAN_MARK internal call for all VARIABLES depending on POISON flag. Created statement is appended to SEQ_P gimple sequence. */ static void asan_poison_variables (hash_set *variables, bool poison, gimple_seq *seq_p) { unsigned c = variables->elements (); if (c == 0) return; auto_vec sorted_variables (c); for (hash_set::iterator it = variables->begin (); it != variables->end (); ++it) sorted_variables.safe_push (*it); sorted_variables.qsort (sort_by_decl_uid); unsigned i; tree var; FOR_EACH_VEC_ELT (sorted_variables, i, var) { asan_poison_variable (var, poison, seq_p); /* Add use_after_scope_memory attribute for the variable in order to prevent re-written into SSA. */ if (!lookup_attribute (ASAN_USE_AFTER_SCOPE_ATTRIBUTE, DECL_ATTRIBUTES (var))) DECL_ATTRIBUTES (var) = tree_cons (get_identifier (ASAN_USE_AFTER_SCOPE_ATTRIBUTE), integer_one_node, DECL_ATTRIBUTES (var)); } } /* Gimplify a BIND_EXPR. Just voidify and recurse. */ static enum gimplify_status gimplify_bind_expr (tree *expr_p, gimple_seq *pre_p) { tree bind_expr = *expr_p; bool old_keep_stack = gimplify_ctxp->keep_stack; bool old_save_stack = gimplify_ctxp->save_stack; tree t; gbind *bind_stmt; gimple_seq body, cleanup; gcall *stack_save; location_t start_locus = 0, end_locus = 0; tree ret_clauses = NULL; tree temp = voidify_wrapper_expr (bind_expr, NULL); /* Mark variables seen in this bind expr. */ for (t = BIND_EXPR_VARS (bind_expr); t ; t = DECL_CHAIN (t)) { if (VAR_P (t)) { struct gimplify_omp_ctx *ctx = gimplify_omp_ctxp; /* Mark variable as local. */ if (ctx && ctx->region_type != ORT_NONE && !DECL_EXTERNAL (t)) { if (! DECL_SEEN_IN_BIND_EXPR_P (t) || splay_tree_lookup (ctx->variables, (splay_tree_key) t) == NULL) { int flag = GOVD_LOCAL; if (ctx->region_type == ORT_SIMD && TREE_ADDRESSABLE (t) && !TREE_STATIC (t)) { if (TREE_CODE (DECL_SIZE_UNIT (t)) != INTEGER_CST) ctx->add_safelen1 = true; else flag = GOVD_PRIVATE; } omp_add_variable (ctx, t, flag | GOVD_SEEN); } /* Static locals inside of target construct or offloaded routines need to be "omp declare target". */ if (TREE_STATIC (t)) for (; ctx; ctx = ctx->outer_context) if ((ctx->region_type & ORT_TARGET) != 0) { if (!lookup_attribute ("omp declare target", DECL_ATTRIBUTES (t))) { tree id = get_identifier ("omp declare target"); DECL_ATTRIBUTES (t) = tree_cons (id, NULL_TREE, DECL_ATTRIBUTES (t)); varpool_node *node = varpool_node::get (t); if (node) { node->offloadable = 1; if (ENABLE_OFFLOADING && !DECL_EXTERNAL (t)) { g->have_offload = true; if (!in_lto_p) vec_safe_push (offload_vars, t); } } } break; } } DECL_SEEN_IN_BIND_EXPR_P (t) = 1; if (DECL_HARD_REGISTER (t) && !is_global_var (t) && cfun) cfun->has_local_explicit_reg_vars = true; } } bind_stmt = gimple_build_bind (BIND_EXPR_VARS (bind_expr), NULL, BIND_EXPR_BLOCK (bind_expr)); gimple_push_bind_expr (bind_stmt); gimplify_ctxp->keep_stack = false; gimplify_ctxp->save_stack = false; /* Gimplify the body into the GIMPLE_BIND tuple's body. */ body = NULL; gimplify_stmt (&BIND_EXPR_BODY (bind_expr), &body); gimple_bind_set_body (bind_stmt, body); /* Source location wise, the cleanup code (stack_restore and clobbers) belongs to the end of the block, so propagate what we have. The stack_save operation belongs to the beginning of block, which we can infer from the bind_expr directly if the block has no explicit assignment. */ if (BIND_EXPR_BLOCK (bind_expr)) { end_locus = BLOCK_SOURCE_END_LOCATION (BIND_EXPR_BLOCK (bind_expr)); start_locus = BLOCK_SOURCE_LOCATION (BIND_EXPR_BLOCK (bind_expr)); } if (start_locus == 0) start_locus = EXPR_LOCATION (bind_expr); cleanup = NULL; stack_save = NULL; /* If the code both contains VLAs and calls alloca, then we cannot reclaim the stack space allocated to the VLAs. */ if (gimplify_ctxp->save_stack && !gimplify_ctxp->keep_stack) { gcall *stack_restore; /* Save stack on entry and restore it on exit. Add a try_finally block to achieve this. */ build_stack_save_restore (&stack_save, &stack_restore); gimple_set_location (stack_save, start_locus); gimple_set_location (stack_restore, end_locus); gimplify_seq_add_stmt (&cleanup, stack_restore); } /* Add clobbers for all variables that go out of scope. */ for (t = BIND_EXPR_VARS (bind_expr); t ; t = DECL_CHAIN (t)) { if (VAR_P (t) && !is_global_var (t) && DECL_CONTEXT (t) == current_function_decl) { if (!DECL_HARD_REGISTER (t) && !TREE_THIS_VOLATILE (t) && !DECL_HAS_VALUE_EXPR_P (t) /* Only care for variables that have to be in memory. Others will be rewritten into SSA names, hence moved to the top-level. */ && !is_gimple_reg (t) && flag_stack_reuse != SR_NONE) { tree clobber = build_clobber (TREE_TYPE (t), CLOBBER_EOL); gimple *clobber_stmt; clobber_stmt = gimple_build_assign (t, clobber); gimple_set_location (clobber_stmt, end_locus); gimplify_seq_add_stmt (&cleanup, clobber_stmt); } if (flag_openacc && oacc_declare_returns != NULL) { tree key = t; if (DECL_HAS_VALUE_EXPR_P (key)) { key = DECL_VALUE_EXPR (key); if (TREE_CODE (key) == INDIRECT_REF) key = TREE_OPERAND (key, 0); } tree *c = oacc_declare_returns->get (key); if (c != NULL) { if (ret_clauses) OMP_CLAUSE_CHAIN (*c) = ret_clauses; ret_clauses = unshare_expr (*c); oacc_declare_returns->remove (key); if (oacc_declare_returns->is_empty ()) { delete oacc_declare_returns; oacc_declare_returns = NULL; } } } } if (asan_poisoned_variables != NULL && asan_poisoned_variables->contains (t)) { asan_poisoned_variables->remove (t); asan_poison_variable (t, true, &cleanup); } if (gimplify_ctxp->live_switch_vars != NULL && gimplify_ctxp->live_switch_vars->contains (t)) gimplify_ctxp->live_switch_vars->remove (t); } if (ret_clauses) { gomp_target *stmt; gimple_stmt_iterator si = gsi_start (cleanup); stmt = gimple_build_omp_target (NULL, GF_OMP_TARGET_KIND_OACC_DECLARE, ret_clauses); gsi_insert_seq_before_without_update (&si, stmt, GSI_NEW_STMT); } if (cleanup) { gtry *gs; gimple_seq new_body; new_body = NULL; gs = gimple_build_try (gimple_bind_body (bind_stmt), cleanup, GIMPLE_TRY_FINALLY); if (stack_save) gimplify_seq_add_stmt (&new_body, stack_save); gimplify_seq_add_stmt (&new_body, gs); gimple_bind_set_body (bind_stmt, new_body); } /* keep_stack propagates all the way up to the outermost BIND_EXPR. */ if (!gimplify_ctxp->keep_stack) gimplify_ctxp->keep_stack = old_keep_stack; gimplify_ctxp->save_stack = old_save_stack; gimple_pop_bind_expr (); gimplify_seq_add_stmt (pre_p, bind_stmt); if (temp) { *expr_p = temp; return GS_OK; } *expr_p = NULL_TREE; return GS_ALL_DONE; } /* Maybe add early return predict statement to PRE_P sequence. */ static void maybe_add_early_return_predict_stmt (gimple_seq *pre_p) { /* If we are not in a conditional context, add PREDICT statement. */ if (gimple_conditional_context ()) { gimple *predict = gimple_build_predict (PRED_TREE_EARLY_RETURN, NOT_TAKEN); gimplify_seq_add_stmt (pre_p, predict); } } /* Gimplify a RETURN_EXPR. If the expression to be returned is not a GIMPLE value, it is assigned to a new temporary and the statement is re-written to return the temporary. PRE_P points to the sequence where side effects that must happen before STMT should be stored. */ static enum gimplify_status gimplify_return_expr (tree stmt, gimple_seq *pre_p) { greturn *ret; tree ret_expr = TREE_OPERAND (stmt, 0); tree result_decl, result; if (ret_expr == error_mark_node) return GS_ERROR; if (!ret_expr || TREE_CODE (ret_expr) == RESULT_DECL) { maybe_add_early_return_predict_stmt (pre_p); greturn *ret = gimple_build_return (ret_expr); copy_warning (ret, stmt); gimplify_seq_add_stmt (pre_p, ret); return GS_ALL_DONE; } if (VOID_TYPE_P (TREE_TYPE (TREE_TYPE (current_function_decl)))) result_decl = NULL_TREE; else if (TREE_CODE (ret_expr) == COMPOUND_EXPR) { /* Used in C++ for handling EH cleanup of the return value if a local cleanup throws. Assume the front-end knows what it's doing. */ result_decl = DECL_RESULT (current_function_decl); /* But crash if we end up trying to modify ret_expr below. */ ret_expr = NULL_TREE; } else { result_decl = TREE_OPERAND (ret_expr, 0); /* See through a return by reference. */ if (TREE_CODE (result_decl) == INDIRECT_REF) result_decl = TREE_OPERAND (result_decl, 0); gcc_assert ((TREE_CODE (ret_expr) == MODIFY_EXPR || TREE_CODE (ret_expr) == INIT_EXPR) && TREE_CODE (result_decl) == RESULT_DECL); } /* If aggregate_value_p is true, then we can return the bare RESULT_DECL. Recall that aggregate_value_p is FALSE for any aggregate type that is returned in registers. If we're returning values in registers, then we don't want to extend the lifetime of the RESULT_DECL, particularly across another call. In addition, for those aggregates for which hard_function_value generates a PARALLEL, we'll die during normal expansion of structure assignments; there's special code in expand_return to handle this case that does not exist in expand_expr. */ if (!result_decl) result = NULL_TREE; else if (aggregate_value_p (result_decl, TREE_TYPE (current_function_decl))) { if (!poly_int_tree_p (DECL_SIZE (result_decl))) { if (!TYPE_SIZES_GIMPLIFIED (TREE_TYPE (result_decl))) gimplify_type_sizes (TREE_TYPE (result_decl), pre_p); /* Note that we don't use gimplify_vla_decl because the RESULT_DECL should be effectively allocated by the caller, i.e. all calls to this function must be subject to the Return Slot Optimization. */ gimplify_one_sizepos (&DECL_SIZE (result_decl), pre_p); gimplify_one_sizepos (&DECL_SIZE_UNIT (result_decl), pre_p); } result = result_decl; } else if (gimplify_ctxp->return_temp) result = gimplify_ctxp->return_temp; else { result = create_tmp_reg (TREE_TYPE (result_decl)); /* ??? With complex control flow (usually involving abnormal edges), we can wind up warning about an uninitialized value for this. Due to how this variable is constructed and initialized, this is never true. Give up and never warn. */ suppress_warning (result, OPT_Wuninitialized); gimplify_ctxp->return_temp = result; } /* Smash the lhs of the MODIFY_EXPR to the temporary we plan to use. Then gimplify the whole thing. */ if (result != result_decl) TREE_OPERAND (ret_expr, 0) = result; gimplify_and_add (TREE_OPERAND (stmt, 0), pre_p); maybe_add_early_return_predict_stmt (pre_p); ret = gimple_build_return (result); copy_warning (ret, stmt); gimplify_seq_add_stmt (pre_p, ret); return GS_ALL_DONE; } /* Gimplify a variable-length array DECL. */ static void gimplify_vla_decl (tree decl, gimple_seq *seq_p) { /* This is a variable-sized decl. Simplify its size and mark it for deferred expansion. */ tree t, addr, ptr_type; gimplify_one_sizepos (&DECL_SIZE (decl), seq_p); gimplify_one_sizepos (&DECL_SIZE_UNIT (decl), seq_p); /* Don't mess with a DECL_VALUE_EXPR set by the front-end. */ if (DECL_HAS_VALUE_EXPR_P (decl)) return; /* All occurrences of this decl in final gimplified code will be replaced by indirection. Setting DECL_VALUE_EXPR does two things: First, it lets the rest of the gimplifier know what replacement to use. Second, it lets the debug info know where to find the value. */ ptr_type = build_pointer_type (TREE_TYPE (decl)); addr = create_tmp_var (ptr_type, get_name (decl)); DECL_IGNORED_P (addr) = 0; t = build_fold_indirect_ref (addr); TREE_THIS_NOTRAP (t) = 1; SET_DECL_VALUE_EXPR (decl, t); DECL_HAS_VALUE_EXPR_P (decl) = 1; t = build_alloca_call_expr (DECL_SIZE_UNIT (decl), DECL_ALIGN (decl), max_int_size_in_bytes (TREE_TYPE (decl))); /* The call has been built for a variable-sized object. */ CALL_ALLOCA_FOR_VAR_P (t) = 1; t = fold_convert (ptr_type, t); t = build2 (MODIFY_EXPR, TREE_TYPE (addr), addr, t); gimplify_and_add (t, seq_p); /* Record the dynamic allocation associated with DECL if requested. */ if (flag_callgraph_info & CALLGRAPH_INFO_DYNAMIC_ALLOC) record_dynamic_alloc (decl); } /* A helper function to be called via walk_tree. Mark all labels under *TP as being forced. To be called for DECL_INITIAL of static variables. */ static tree force_labels_r (tree *tp, int *walk_subtrees, void *data ATTRIBUTE_UNUSED) { if (TYPE_P (*tp)) *walk_subtrees = 0; if (TREE_CODE (*tp) == LABEL_DECL) { FORCED_LABEL (*tp) = 1; cfun->has_forced_label_in_static = 1; } return NULL_TREE; } /* Generate an initialization to automatic variable DECL based on INIT_TYPE. Build a call to internal const function DEFERRED_INIT: 1st argument: SIZE of the DECL; 2nd argument: INIT_TYPE; 3rd argument: NAME of the DECL; as LHS = DEFERRED_INIT (SIZE of the DECL, INIT_TYPE, NAME of the DECL). */ static void gimple_add_init_for_auto_var (tree decl, enum auto_init_type init_type, gimple_seq *seq_p) { gcc_assert (auto_var_p (decl)); gcc_assert (init_type > AUTO_INIT_UNINITIALIZED); location_t loc = EXPR_LOCATION (decl); tree decl_size = TYPE_SIZE_UNIT (TREE_TYPE (decl)); tree init_type_node = build_int_cst (integer_type_node, (int) init_type); tree decl_name = NULL_TREE; if (DECL_NAME (decl)) decl_name = build_string_literal (IDENTIFIER_LENGTH (DECL_NAME (decl)) + 1, IDENTIFIER_POINTER (DECL_NAME (decl))); else { char *decl_name_anonymous = xasprintf ("D.%u", DECL_UID (decl)); decl_name = build_string_literal (strlen (decl_name_anonymous) + 1, decl_name_anonymous); free (decl_name_anonymous); } tree call = build_call_expr_internal_loc (loc, IFN_DEFERRED_INIT, TREE_TYPE (decl), 3, decl_size, init_type_node, decl_name); gimplify_assign (decl, call, seq_p); } /* Generate padding initialization for automatic vairable DECL. C guarantees that brace-init with fewer initializers than members aggregate will initialize the rest of the aggregate as-if it were static initialization. In turn static initialization guarantees that padding is initialized to zero. So, we always initialize paddings to zeroes regardless INIT_TYPE. To do the padding initialization, we insert a call to __builtin_clear_padding (&decl, 0, for_auto_init = true). Note, we add an additional dummy argument for __builtin_clear_padding, 'for_auto_init' to distinguish whether this call is for automatic variable initialization or not. */ static void gimple_add_padding_init_for_auto_var (tree decl, bool is_vla, gimple_seq *seq_p) { tree addr_of_decl = NULL_TREE; tree fn = builtin_decl_explicit (BUILT_IN_CLEAR_PADDING); if (is_vla) { /* The temporary address variable for this vla should be created in gimplify_vla_decl. */ gcc_assert (DECL_HAS_VALUE_EXPR_P (decl)); gcc_assert (TREE_CODE (DECL_VALUE_EXPR (decl)) == INDIRECT_REF); addr_of_decl = TREE_OPERAND (DECL_VALUE_EXPR (decl), 0); } else { mark_addressable (decl); addr_of_decl = build_fold_addr_expr (decl); } gimple *call = gimple_build_call (fn, 2, addr_of_decl, build_one_cst (TREE_TYPE (addr_of_decl))); gimplify_seq_add_stmt (seq_p, call); } /* Return true if the DECL need to be automaticly initialized by the compiler. */ static bool is_var_need_auto_init (tree decl) { if (auto_var_p (decl) && (TREE_CODE (decl) != VAR_DECL || !DECL_HARD_REGISTER (decl)) && (flag_auto_var_init > AUTO_INIT_UNINITIALIZED) && (!lookup_attribute ("uninitialized", DECL_ATTRIBUTES (decl))) && !OPAQUE_TYPE_P (TREE_TYPE (decl)) && !is_empty_type (TREE_TYPE (decl))) return true; return false; } /* Gimplify a DECL_EXPR node *STMT_P by making any necessary allocation and initialization explicit. */ static enum gimplify_status gimplify_decl_expr (tree *stmt_p, gimple_seq *seq_p) { tree stmt = *stmt_p; tree decl = DECL_EXPR_DECL (stmt); *stmt_p = NULL_TREE; if (TREE_TYPE (decl) == error_mark_node) return GS_ERROR; if ((TREE_CODE (decl) == TYPE_DECL || VAR_P (decl)) && !TYPE_SIZES_GIMPLIFIED (TREE_TYPE (decl))) { gimplify_type_sizes (TREE_TYPE (decl), seq_p); if (TREE_CODE (TREE_TYPE (decl)) == REFERENCE_TYPE) gimplify_type_sizes (TREE_TYPE (TREE_TYPE (decl)), seq_p); } /* ??? DECL_ORIGINAL_TYPE is streamed for LTO so it needs to be gimplified in case its size expressions contain problematic nodes like CALL_EXPR. */ if (TREE_CODE (decl) == TYPE_DECL && DECL_ORIGINAL_TYPE (decl) && !TYPE_SIZES_GIMPLIFIED (DECL_ORIGINAL_TYPE (decl))) { gimplify_type_sizes (DECL_ORIGINAL_TYPE (decl), seq_p); if (TREE_CODE (DECL_ORIGINAL_TYPE (decl)) == REFERENCE_TYPE) gimplify_type_sizes (TREE_TYPE (DECL_ORIGINAL_TYPE (decl)), seq_p); } if (VAR_P (decl) && !DECL_EXTERNAL (decl)) { tree init = DECL_INITIAL (decl); bool is_vla = false; /* Check whether a decl has FE created VALUE_EXPR here BEFORE gimplify_vla_decl creates VALUE_EXPR for a vla decl. If the decl has VALUE_EXPR that was created by FE (usually C++FE), it's a proxy varaible, and FE already initialized the VALUE_EXPR of it, we should not initialize it anymore. */ bool decl_had_value_expr_p = DECL_HAS_VALUE_EXPR_P (decl); poly_uint64 size; if (!poly_int_tree_p (DECL_SIZE_UNIT (decl), &size) || (!TREE_STATIC (decl) && flag_stack_check == GENERIC_STACK_CHECK && maybe_gt (size, (unsigned HOST_WIDE_INT) STACK_CHECK_MAX_VAR_SIZE))) { gimplify_vla_decl (decl, seq_p); is_vla = true; } if (asan_poisoned_variables && !is_vla && TREE_ADDRESSABLE (decl) && !TREE_STATIC (decl) && !DECL_HAS_VALUE_EXPR_P (decl) && DECL_ALIGN (decl) <= MAX_SUPPORTED_STACK_ALIGNMENT && dbg_cnt (asan_use_after_scope) && !gimplify_omp_ctxp /* GNAT introduces temporaries to hold return values of calls in initializers of variables defined in other units, so the declaration of the variable is discarded completely. We do not want to issue poison calls for such dropped variables. */ && (DECL_SEEN_IN_BIND_EXPR_P (decl) || (DECL_ARTIFICIAL (decl) && DECL_NAME (decl) == NULL_TREE))) { asan_poisoned_variables->add (decl); asan_poison_variable (decl, false, seq_p); if (!DECL_ARTIFICIAL (decl) && gimplify_ctxp->live_switch_vars) gimplify_ctxp->live_switch_vars->add (decl); } /* Some front ends do not explicitly declare all anonymous artificial variables. We compensate here by declaring the variables, though it would be better if the front ends would explicitly declare them. */ if (!DECL_SEEN_IN_BIND_EXPR_P (decl) && DECL_ARTIFICIAL (decl) && DECL_NAME (decl) == NULL_TREE) gimple_add_tmp_var (decl); if (init && init != error_mark_node) { if (!TREE_STATIC (decl)) { DECL_INITIAL (decl) = NULL_TREE; init = build2 (INIT_EXPR, void_type_node, decl, init); gimplify_and_add (init, seq_p); ggc_free (init); /* Clear TREE_READONLY if we really have an initialization. */ if (!DECL_INITIAL (decl) && !omp_privatize_by_reference (decl)) TREE_READONLY (decl) = 0; } else /* We must still examine initializers for static variables as they may contain a label address. */ walk_tree (&init, force_labels_r, NULL, NULL); } /* When there is no explicit initializer, if the user requested, We should insert an artifical initializer for this automatic variable. */ else if (is_var_need_auto_init (decl) && !decl_had_value_expr_p) { gimple_add_init_for_auto_var (decl, flag_auto_var_init, seq_p); /* The expanding of a call to the above .DEFERRED_INIT will apply block initialization to the whole space covered by this variable. As a result, all the paddings will be initialized to zeroes for zero initialization and 0xFE byte-repeatable patterns for pattern initialization. In order to make the paddings as zeroes for pattern init, We should add a call to __builtin_clear_padding to clear the paddings to zero in compatiple with CLANG. We cannot insert this call if the variable is a gimple register since __builtin_clear_padding will take the address of the variable. As a result, if a long double/_Complex long double variable will spilled into stack later, its padding is 0XFE. */ if (flag_auto_var_init == AUTO_INIT_PATTERN && !is_gimple_reg (decl) && clear_padding_type_may_have_padding_p (TREE_TYPE (decl))) gimple_add_padding_init_for_auto_var (decl, is_vla, seq_p); } } return GS_ALL_DONE; } /* Gimplify a LOOP_EXPR. Normally this just involves gimplifying the body and replacing the LOOP_EXPR with goto, but if the loop contains an EXIT_EXPR, we need to append a label for it to jump to. */ static enum gimplify_status gimplify_loop_expr (tree *expr_p, gimple_seq *pre_p) { tree saved_label = gimplify_ctxp->exit_label; tree start_label = create_artificial_label (UNKNOWN_LOCATION); gimplify_seq_add_stmt (pre_p, gimple_build_label (start_label)); gimplify_ctxp->exit_label = NULL_TREE; gimplify_and_add (LOOP_EXPR_BODY (*expr_p), pre_p); gimplify_seq_add_stmt (pre_p, gimple_build_goto (start_label)); if (gimplify_ctxp->exit_label) gimplify_seq_add_stmt (pre_p, gimple_build_label (gimplify_ctxp->exit_label)); gimplify_ctxp->exit_label = saved_label; *expr_p = NULL; return GS_ALL_DONE; } /* Gimplify a statement list onto a sequence. These may be created either by an enlightened front-end, or by shortcut_cond_expr. */ static enum gimplify_status gimplify_statement_list (tree *expr_p, gimple_seq *pre_p) { tree temp = voidify_wrapper_expr (*expr_p, NULL); tree_stmt_iterator i = tsi_start (*expr_p); while (!tsi_end_p (i)) { gimplify_stmt (tsi_stmt_ptr (i), pre_p); tsi_delink (&i); } if (temp) { *expr_p = temp; return GS_OK; } return GS_ALL_DONE; } /* Emit warning for the unreachable statment STMT if needed. Return the gimple itself when the warning is emitted, otherwise return NULL. */ static gimple * emit_warn_switch_unreachable (gimple *stmt) { if (gimple_code (stmt) == GIMPLE_GOTO && TREE_CODE (gimple_goto_dest (stmt)) == LABEL_DECL && DECL_ARTIFICIAL (gimple_goto_dest (stmt))) /* Don't warn for compiler-generated gotos. These occur in Duff's devices, for example. */ return NULL; else if ((flag_auto_var_init > AUTO_INIT_UNINITIALIZED) && ((gimple_call_internal_p (stmt, IFN_DEFERRED_INIT)) || (gimple_call_builtin_p (stmt, BUILT_IN_CLEAR_PADDING) && (bool) TREE_INT_CST_LOW (gimple_call_arg (stmt, 1))) || (is_gimple_assign (stmt) && gimple_assign_single_p (stmt) && (TREE_CODE (gimple_assign_rhs1 (stmt)) == SSA_NAME) && gimple_call_internal_p ( SSA_NAME_DEF_STMT (gimple_assign_rhs1 (stmt)), IFN_DEFERRED_INIT)))) /* Don't warn for compiler-generated initializations for -ftrivial-auto-var-init. There are 3 cases: case 1: a call to .DEFERRED_INIT; case 2: a call to __builtin_clear_padding with the 2nd argument is present and non-zero; case 3: a gimple assign store right after the call to .DEFERRED_INIT that has the LHS of .DEFERRED_INIT as the RHS as following: _1 = .DEFERRED_INIT (4, 2, &"i1"[0]); i1 = _1. */ return NULL; else warning_at (gimple_location (stmt), OPT_Wswitch_unreachable, "statement will never be executed"); return stmt; } /* Callback for walk_gimple_seq. */ static tree warn_switch_unreachable_and_auto_init_r (gimple_stmt_iterator *gsi_p, bool *handled_ops_p, struct walk_stmt_info *wi) { gimple *stmt = gsi_stmt (*gsi_p); bool unreachable_issued = wi->info != NULL; *handled_ops_p = true; switch (gimple_code (stmt)) { case GIMPLE_TRY: /* A compiler-generated cleanup or a user-written try block. If it's empty, don't dive into it--that would result in worse location info. */ if (gimple_try_eval (stmt) == NULL) { if (warn_switch_unreachable && !unreachable_issued) wi->info = emit_warn_switch_unreachable (stmt); /* Stop when auto var init warning is not on. */ if (!warn_trivial_auto_var_init) return integer_zero_node; } /* Fall through. */ case GIMPLE_BIND: case GIMPLE_CATCH: case GIMPLE_EH_FILTER: case GIMPLE_TRANSACTION: /* Walk the sub-statements. */ *handled_ops_p = false; break; case GIMPLE_DEBUG: /* Ignore these. We may generate them before declarations that are never executed. If there's something to warn about, there will be non-debug stmts too, and we'll catch those. */ break; case GIMPLE_LABEL: /* Stop till the first Label. */ return integer_zero_node; case GIMPLE_CALL: if (gimple_call_internal_p (stmt, IFN_ASAN_MARK)) { *handled_ops_p = false; break; } if (warn_trivial_auto_var_init && flag_auto_var_init > AUTO_INIT_UNINITIALIZED && gimple_call_internal_p (stmt, IFN_DEFERRED_INIT)) { /* Get the variable name from the 3rd argument of call. */ tree var_name = gimple_call_arg (stmt, 2); var_name = TREE_OPERAND (TREE_OPERAND (var_name, 0), 0); const char *var_name_str = TREE_STRING_POINTER (var_name); warning_at (gimple_location (stmt), OPT_Wtrivial_auto_var_init, "%qs cannot be initialized with" "%<-ftrivial-auto-var_init%>", var_name_str); break; } /* Fall through. */ default: /* check the first "real" statement (not a decl/lexical scope/...), issue warning if needed. */ if (warn_switch_unreachable && !unreachable_issued) wi->info = emit_warn_switch_unreachable (stmt); /* Stop when auto var init warning is not on. */ if (!warn_trivial_auto_var_init) return integer_zero_node; break; } return NULL_TREE; } /* Possibly warn about unreachable statements between switch's controlling expression and the first case. Also warn about -ftrivial-auto-var-init cannot initialize the auto variable under such situation. SEQ is the body of a switch expression. */ static void maybe_warn_switch_unreachable_and_auto_init (gimple_seq seq) { if ((!warn_switch_unreachable && !warn_trivial_auto_var_init) /* This warning doesn't play well with Fortran when optimizations are on. */ || lang_GNU_Fortran () || seq == NULL) return; struct walk_stmt_info wi; memset (&wi, 0, sizeof (wi)); walk_gimple_seq (seq, warn_switch_unreachable_and_auto_init_r, NULL, &wi); } /* A label entry that pairs label and a location. */ struct label_entry { tree label; location_t loc; }; /* Find LABEL in vector of label entries VEC. */ static struct label_entry * find_label_entry (const auto_vec *vec, tree label) { unsigned int i; struct label_entry *l; FOR_EACH_VEC_ELT (*vec, i, l) if (l->label == label) return l; return NULL; } /* Return true if LABEL, a LABEL_DECL, represents a case label in a vector of labels CASES. */ static bool case_label_p (const vec *cases, tree label) { unsigned int i; tree l; FOR_EACH_VEC_ELT (*cases, i, l) if (CASE_LABEL (l) == label) return true; return false; } /* Find the last nondebug statement in a scope STMT. */ static gimple * last_stmt_in_scope (gimple *stmt) { if (!stmt) return NULL; switch (gimple_code (stmt)) { case GIMPLE_BIND: { gbind *bind = as_a (stmt); stmt = gimple_seq_last_nondebug_stmt (gimple_bind_body (bind)); return last_stmt_in_scope (stmt); } case GIMPLE_TRY: { gtry *try_stmt = as_a (stmt); stmt = gimple_seq_last_nondebug_stmt (gimple_try_eval (try_stmt)); gimple *last_eval = last_stmt_in_scope (stmt); if (gimple_stmt_may_fallthru (last_eval) && (last_eval == NULL || !gimple_call_internal_p (last_eval, IFN_FALLTHROUGH)) && gimple_try_kind (try_stmt) == GIMPLE_TRY_FINALLY) { stmt = gimple_seq_last_nondebug_stmt (gimple_try_cleanup (try_stmt)); return last_stmt_in_scope (stmt); } else return last_eval; } case GIMPLE_DEBUG: gcc_unreachable (); default: return stmt; } } /* Collect labels that may fall through into LABELS and return the statement preceding another case label, or a user-defined label. Store a location useful to give warnings at *PREVLOC (usually the location of the returned statement or of its surrounding scope). */ static gimple * collect_fallthrough_labels (gimple_stmt_iterator *gsi_p, auto_vec *labels, location_t *prevloc) { gimple *prev = NULL; *prevloc = UNKNOWN_LOCATION; do { if (gimple_code (gsi_stmt (*gsi_p)) == GIMPLE_BIND) { /* Recognize the special GIMPLE_BIND added by gimplify_switch_expr, which starts on a GIMPLE_SWITCH and ends with a break label. Handle that as a single statement that can fall through. */ gbind *bind = as_a (gsi_stmt (*gsi_p)); gimple *first = gimple_seq_first_stmt (gimple_bind_body (bind)); gimple *last = gimple_seq_last_stmt (gimple_bind_body (bind)); if (last && gimple_code (first) == GIMPLE_SWITCH && gimple_code (last) == GIMPLE_LABEL) { tree label = gimple_label_label (as_a (last)); if (SWITCH_BREAK_LABEL_P (label)) { prev = bind; gsi_next (gsi_p); continue; } } } if (gimple_code (gsi_stmt (*gsi_p)) == GIMPLE_BIND || gimple_code (gsi_stmt (*gsi_p)) == GIMPLE_TRY) { /* Nested scope. Only look at the last statement of the innermost scope. */ location_t bind_loc = gimple_location (gsi_stmt (*gsi_p)); gimple *last = last_stmt_in_scope (gsi_stmt (*gsi_p)); if (last) { prev = last; /* It might be a label without a location. Use the location of the scope then. */ if (!gimple_has_location (prev)) *prevloc = bind_loc; } gsi_next (gsi_p); continue; } /* Ifs are tricky. */ if (gimple_code (gsi_stmt (*gsi_p)) == GIMPLE_COND) { gcond *cond_stmt = as_a (gsi_stmt (*gsi_p)); tree false_lab = gimple_cond_false_label (cond_stmt); location_t if_loc = gimple_location (cond_stmt); /* If we have e.g. if (i > 1) goto ; else goto D; we can't do much with the else-branch. */ if (!DECL_ARTIFICIAL (false_lab)) break; /* Go on until the false label, then one step back. */ for (; !gsi_end_p (*gsi_p); gsi_next (gsi_p)) { gimple *stmt = gsi_stmt (*gsi_p); if (gimple_code (stmt) == GIMPLE_LABEL && gimple_label_label (as_a (stmt)) == false_lab) break; } /* Not found? Oops. */ if (gsi_end_p (*gsi_p)) break; /* A dead label can't fall through. */ if (!UNUSED_LABEL_P (false_lab)) { struct label_entry l = { false_lab, if_loc }; labels->safe_push (l); } /* Go to the last statement of the then branch. */ gsi_prev (gsi_p); /* if (i != 0) goto ; else goto ; : ; goto ; : */ if (gimple_code (gsi_stmt (*gsi_p)) == GIMPLE_GOTO && !gimple_has_location (gsi_stmt (*gsi_p))) { /* Look at the statement before, it might be attribute fallthrough, in which case don't warn. */ gsi_prev (gsi_p); bool fallthru_before_dest = gimple_call_internal_p (gsi_stmt (*gsi_p), IFN_FALLTHROUGH); gsi_next (gsi_p); tree goto_dest = gimple_goto_dest (gsi_stmt (*gsi_p)); if (!fallthru_before_dest) { struct label_entry l = { goto_dest, if_loc }; labels->safe_push (l); } } /* This case is about if (1 != 0) goto ; else goto ; : n = n + 1; // #1 : // #2 : // #3 where #2 is UNUSED_LABEL_P and we want to warn about #1 falling through to #3. So set PREV to #1. */ else if (UNUSED_LABEL_P (false_lab)) prev = gsi_stmt (*gsi_p); /* And move back. */ gsi_next (gsi_p); } /* Remember the last statement. Skip labels that are of no interest to us. */ if (gimple_code (gsi_stmt (*gsi_p)) == GIMPLE_LABEL) { tree label = gimple_label_label (as_a (gsi_stmt (*gsi_p))); if (find_label_entry (labels, label)) prev = gsi_stmt (*gsi_p); } else if (gimple_call_internal_p (gsi_stmt (*gsi_p), IFN_ASAN_MARK)) ; else if (gimple_code (gsi_stmt (*gsi_p)) == GIMPLE_PREDICT) ; else if (!is_gimple_debug (gsi_stmt (*gsi_p))) prev = gsi_stmt (*gsi_p); gsi_next (gsi_p); } while (!gsi_end_p (*gsi_p) /* Stop if we find a case or a user-defined label. */ && (gimple_code (gsi_stmt (*gsi_p)) != GIMPLE_LABEL || !gimple_has_location (gsi_stmt (*gsi_p)))); if (prev && gimple_has_location (prev)) *prevloc = gimple_location (prev); return prev; } /* Return true if the switch fallthough warning should occur. LABEL is the label statement that we're falling through to. */ static bool should_warn_for_implicit_fallthrough (gimple_stmt_iterator *gsi_p, tree label) { gimple_stmt_iterator gsi = *gsi_p; /* Don't warn if the label is marked with a "falls through" comment. */ if (FALLTHROUGH_LABEL_P (label)) return false; /* Don't warn for non-case labels followed by a statement: case 0: foo (); label: bar (); as these are likely intentional. */ if (!case_label_p (&gimplify_ctxp->case_labels, label)) { tree l; while (!gsi_end_p (gsi) && gimple_code (gsi_stmt (gsi)) == GIMPLE_LABEL && (l = gimple_label_label (as_a (gsi_stmt (gsi)))) && !case_label_p (&gimplify_ctxp->case_labels, l)) gsi_next_nondebug (&gsi); if (gsi_end_p (gsi) || gimple_code (gsi_stmt (gsi)) != GIMPLE_LABEL) return false; } /* Don't warn for terminated branches, i.e. when the subsequent case labels immediately breaks. */ gsi = *gsi_p; /* Skip all immediately following labels. */ while (!gsi_end_p (gsi) && (gimple_code (gsi_stmt (gsi)) == GIMPLE_LABEL || gimple_code (gsi_stmt (gsi)) == GIMPLE_PREDICT)) gsi_next_nondebug (&gsi); /* { ... something; default:; } */ if (gsi_end_p (gsi) /* { ... something; default: break; } or { ... something; default: goto L; } */ || gimple_code (gsi_stmt (gsi)) == GIMPLE_GOTO /* { ... something; default: return; } */ || gimple_code (gsi_stmt (gsi)) == GIMPLE_RETURN) return false; return true; } /* Callback for walk_gimple_seq. */ static tree warn_implicit_fallthrough_r (gimple_stmt_iterator *gsi_p, bool *handled_ops_p, struct walk_stmt_info *) { gimple *stmt = gsi_stmt (*gsi_p); *handled_ops_p = true; switch (gimple_code (stmt)) { case GIMPLE_TRY: case GIMPLE_BIND: case GIMPLE_CATCH: case GIMPLE_EH_FILTER: case GIMPLE_TRANSACTION: /* Walk the sub-statements. */ *handled_ops_p = false; break; /* Find a sequence of form: GIMPLE_LABEL [...] GIMPLE_LABEL and possibly warn. */ case GIMPLE_LABEL: { /* Found a label. Skip all immediately following labels. */ while (!gsi_end_p (*gsi_p) && gimple_code (gsi_stmt (*gsi_p)) == GIMPLE_LABEL) gsi_next_nondebug (gsi_p); /* There might be no more statements. */ if (gsi_end_p (*gsi_p)) return integer_zero_node; /* Vector of labels that fall through. */ auto_vec labels; location_t prevloc; gimple *prev = collect_fallthrough_labels (gsi_p, &labels, &prevloc); /* There might be no more statements. */ if (gsi_end_p (*gsi_p)) return integer_zero_node; gimple *next = gsi_stmt (*gsi_p); tree label; /* If what follows is a label, then we may have a fallthrough. */ if (gimple_code (next) == GIMPLE_LABEL && gimple_has_location (next) && (label = gimple_label_label (as_a (next))) && prev != NULL) { struct label_entry *l; bool warned_p = false; auto_diagnostic_group d; if (!should_warn_for_implicit_fallthrough (gsi_p, label)) /* Quiet. */; else if (gimple_code (prev) == GIMPLE_LABEL && (label = gimple_label_label (as_a (prev))) && (l = find_label_entry (&labels, label))) warned_p = warning_at (l->loc, OPT_Wimplicit_fallthrough_, "this statement may fall through"); else if (!gimple_call_internal_p (prev, IFN_FALLTHROUGH) /* Try to be clever and don't warn when the statement can't actually fall through. */ && gimple_stmt_may_fallthru (prev) && prevloc != UNKNOWN_LOCATION) warned_p = warning_at (prevloc, OPT_Wimplicit_fallthrough_, "this statement may fall through"); if (warned_p) inform (gimple_location (next), "here"); /* Mark this label as processed so as to prevent multiple warnings in nested switches. */ FALLTHROUGH_LABEL_P (label) = true; /* So that next warn_implicit_fallthrough_r will start looking for a new sequence starting with this label. */ gsi_prev (gsi_p); } } break; default: break; } return NULL_TREE; } /* Warn when a switch case falls through. */ static void maybe_warn_implicit_fallthrough (gimple_seq seq) { if (!warn_implicit_fallthrough) return; /* This warning is meant for C/C++/ObjC/ObjC++ only. */ if (!(lang_GNU_C () || lang_GNU_CXX () || lang_GNU_OBJC ())) return; struct walk_stmt_info wi; memset (&wi, 0, sizeof (wi)); walk_gimple_seq (seq, warn_implicit_fallthrough_r, NULL, &wi); } /* Callback for walk_gimple_seq. */ static tree expand_FALLTHROUGH_r (gimple_stmt_iterator *gsi_p, bool *handled_ops_p, struct walk_stmt_info *wi) { gimple *stmt = gsi_stmt (*gsi_p); *handled_ops_p = true; switch (gimple_code (stmt)) { case GIMPLE_TRY: case GIMPLE_BIND: case GIMPLE_CATCH: case GIMPLE_EH_FILTER: case GIMPLE_TRANSACTION: /* Walk the sub-statements. */ *handled_ops_p = false; break; case GIMPLE_CALL: if (gimple_call_internal_p (stmt, IFN_FALLTHROUGH)) { gsi_remove (gsi_p, true); if (gsi_end_p (*gsi_p)) { *static_cast(wi->info) = gimple_location (stmt); return integer_zero_node; } bool found = false; location_t loc = gimple_location (stmt); gimple_stmt_iterator gsi2 = *gsi_p; stmt = gsi_stmt (gsi2); if (gimple_code (stmt) == GIMPLE_GOTO && !gimple_has_location (stmt)) { /* Go on until the artificial label. */ tree goto_dest = gimple_goto_dest (stmt); for (; !gsi_end_p (gsi2); gsi_next (&gsi2)) { if (gimple_code (gsi_stmt (gsi2)) == GIMPLE_LABEL && gimple_label_label (as_a (gsi_stmt (gsi2))) == goto_dest) break; } /* Not found? Stop. */ if (gsi_end_p (gsi2)) break; /* Look one past it. */ gsi_next (&gsi2); } /* We're looking for a case label or default label here. */ while (!gsi_end_p (gsi2)) { stmt = gsi_stmt (gsi2); if (gimple_code (stmt) == GIMPLE_LABEL) { tree label = gimple_label_label (as_a (stmt)); if (gimple_has_location (stmt) && DECL_ARTIFICIAL (label)) { found = true; break; } } else if (gimple_call_internal_p (stmt, IFN_ASAN_MARK)) ; else if (!is_gimple_debug (stmt)) /* Anything else is not expected. */ break; gsi_next (&gsi2); } if (!found) pedwarn (loc, 0, "attribute % not preceding " "a case label or default label"); } break; default: break; } return NULL_TREE; } /* Expand all FALLTHROUGH () calls in SEQ. */ static void expand_FALLTHROUGH (gimple_seq *seq_p) { struct walk_stmt_info wi; location_t loc; memset (&wi, 0, sizeof (wi)); wi.info = (void *) &loc; walk_gimple_seq_mod (seq_p, expand_FALLTHROUGH_r, NULL, &wi); if (wi.callback_result == integer_zero_node) /* We've found [[fallthrough]]; at the end of a switch, which the C++ standard says is ill-formed; see [dcl.attr.fallthrough]. */ pedwarn (loc, 0, "attribute % not preceding " "a case label or default label"); } /* Gimplify a SWITCH_EXPR, and collect the vector of labels it can branch to. */ static enum gimplify_status gimplify_switch_expr (tree *expr_p, gimple_seq *pre_p) { tree switch_expr = *expr_p; gimple_seq switch_body_seq = NULL; enum gimplify_status ret; tree index_type = TREE_TYPE (switch_expr); if (index_type == NULL_TREE) index_type = TREE_TYPE (SWITCH_COND (switch_expr)); ret = gimplify_expr (&SWITCH_COND (switch_expr), pre_p, NULL, is_gimple_val, fb_rvalue); if (ret == GS_ERROR || ret == GS_UNHANDLED) return ret; if (SWITCH_BODY (switch_expr)) { vec labels; vec saved_labels; hash_set *saved_live_switch_vars = NULL; tree default_case = NULL_TREE; gswitch *switch_stmt; /* Save old labels, get new ones from body, then restore the old labels. Save all the things from the switch body to append after. */ saved_labels = gimplify_ctxp->case_labels; gimplify_ctxp->case_labels.create (8); /* Do not create live_switch_vars if SWITCH_BODY is not a BIND_EXPR. */ saved_live_switch_vars = gimplify_ctxp->live_switch_vars; tree_code body_type = TREE_CODE (SWITCH_BODY (switch_expr)); if (body_type == BIND_EXPR || body_type == STATEMENT_LIST) gimplify_ctxp->live_switch_vars = new hash_set (4); else gimplify_ctxp->live_switch_vars = NULL; bool old_in_switch_expr = gimplify_ctxp->in_switch_expr; gimplify_ctxp->in_switch_expr = true; gimplify_stmt (&SWITCH_BODY (switch_expr), &switch_body_seq); gimplify_ctxp->in_switch_expr = old_in_switch_expr; maybe_warn_switch_unreachable_and_auto_init (switch_body_seq); maybe_warn_implicit_fallthrough (switch_body_seq); /* Only do this for the outermost GIMPLE_SWITCH. */ if (!gimplify_ctxp->in_switch_expr) expand_FALLTHROUGH (&switch_body_seq); labels = gimplify_ctxp->case_labels; gimplify_ctxp->case_labels = saved_labels; if (gimplify_ctxp->live_switch_vars) { gcc_assert (gimplify_ctxp->live_switch_vars->is_empty ()); delete gimplify_ctxp->live_switch_vars; } gimplify_ctxp->live_switch_vars = saved_live_switch_vars; preprocess_case_label_vec_for_gimple (labels, index_type, &default_case); bool add_bind = false; if (!default_case) { glabel *new_default; default_case = build_case_label (NULL_TREE, NULL_TREE, create_artificial_label (UNKNOWN_LOCATION)); if (old_in_switch_expr) { SWITCH_BREAK_LABEL_P (CASE_LABEL (default_case)) = 1; add_bind = true; } new_default = gimple_build_label (CASE_LABEL (default_case)); gimplify_seq_add_stmt (&switch_body_seq, new_default); } else if (old_in_switch_expr) { gimple *last = gimple_seq_last_stmt (switch_body_seq); if (last && gimple_code (last) == GIMPLE_LABEL) { tree label = gimple_label_label (as_a (last)); if (SWITCH_BREAK_LABEL_P (label)) add_bind = true; } } switch_stmt = gimple_build_switch (SWITCH_COND (switch_expr), default_case, labels); /* For the benefit of -Wimplicit-fallthrough, if switch_body_seq ends with a GIMPLE_LABEL holding SWITCH_BREAK_LABEL_P LABEL_DECL, wrap the GIMPLE_SWITCH up to that GIMPLE_LABEL into a GIMPLE_BIND, so that we can easily find the start and end of the switch statement. */ if (add_bind) { gimple_seq bind_body = NULL; gimplify_seq_add_stmt (&bind_body, switch_stmt); gimple_seq_add_seq (&bind_body, switch_body_seq); gbind *bind = gimple_build_bind (NULL_TREE, bind_body, NULL_TREE); gimple_set_location (bind, EXPR_LOCATION (switch_expr)); gimplify_seq_add_stmt (pre_p, bind); } else { gimplify_seq_add_stmt (pre_p, switch_stmt); gimplify_seq_add_seq (pre_p, switch_body_seq); } labels.release (); } else gcc_unreachable (); return GS_ALL_DONE; } /* Gimplify the LABEL_EXPR pointed to by EXPR_P. */ static enum gimplify_status gimplify_label_expr (tree *expr_p, gimple_seq *pre_p) { gcc_assert (decl_function_context (LABEL_EXPR_LABEL (*expr_p)) == current_function_decl); tree label = LABEL_EXPR_LABEL (*expr_p); glabel *label_stmt = gimple_build_label (label); gimple_set_location (label_stmt, EXPR_LOCATION (*expr_p)); gimplify_seq_add_stmt (pre_p, label_stmt); if (lookup_attribute ("cold", DECL_ATTRIBUTES (label))) gimple_seq_add_stmt (pre_p, gimple_build_predict (PRED_COLD_LABEL, NOT_TAKEN)); else if (lookup_attribute ("hot", DECL_ATTRIBUTES (label))) gimple_seq_add_stmt (pre_p, gimple_build_predict (PRED_HOT_LABEL, TAKEN)); return GS_ALL_DONE; } /* Gimplify the CASE_LABEL_EXPR pointed to by EXPR_P. */ static enum gimplify_status gimplify_case_label_expr (tree *expr_p, gimple_seq *pre_p) { struct gimplify_ctx *ctxp; glabel *label_stmt; /* Invalid programs can play Duff's Device type games with, for example, #pragma omp parallel. At least in the C front end, we don't detect such invalid branches until after gimplification, in the diagnose_omp_blocks pass. */ for (ctxp = gimplify_ctxp; ; ctxp = ctxp->prev_context) if (ctxp->case_labels.exists ()) break; tree label = CASE_LABEL (*expr_p); label_stmt = gimple_build_label (label); gimple_set_location (label_stmt, EXPR_LOCATION (*expr_p)); ctxp->case_labels.safe_push (*expr_p); gimplify_seq_add_stmt (pre_p, label_stmt); if (lookup_attribute ("cold", DECL_ATTRIBUTES (label))) gimple_seq_add_stmt (pre_p, gimple_build_predict (PRED_COLD_LABEL, NOT_TAKEN)); else if (lookup_attribute ("hot", DECL_ATTRIBUTES (label))) gimple_seq_add_stmt (pre_p, gimple_build_predict (PRED_HOT_LABEL, TAKEN)); return GS_ALL_DONE; } /* Build a GOTO to the LABEL_DECL pointed to by LABEL_P, building it first if necessary. */ tree build_and_jump (tree *label_p) { if (label_p == NULL) /* If there's nowhere to jump, just fall through. */ return NULL_TREE; if (*label_p == NULL_TREE) { tree label = create_artificial_label (UNKNOWN_LOCATION); *label_p = label; } return build1 (GOTO_EXPR, void_type_node, *label_p); } /* Gimplify an EXIT_EXPR by converting to a GOTO_EXPR inside a COND_EXPR. This also involves building a label to jump to and communicating it to gimplify_loop_expr through gimplify_ctxp->exit_label. */ static enum gimplify_status gimplify_exit_expr (tree *expr_p) { tree cond = TREE_OPERAND (*expr_p, 0); tree expr; expr = build_and_jump (&gimplify_ctxp->exit_label); expr = build3 (COND_EXPR, void_type_node, cond, expr, NULL_TREE); *expr_p = expr; return GS_OK; } /* *EXPR_P is a COMPONENT_REF being used as an rvalue. If its type is different from its canonical type, wrap the whole thing inside a NOP_EXPR and force the type of the COMPONENT_REF to be the canonical type. The canonical type of a COMPONENT_REF is the type of the field being referenced--unless the field is a bit-field which can be read directly in a smaller mode, in which case the canonical type is the sign-appropriate type corresponding to that mode. */ static void canonicalize_component_ref (tree *expr_p) { tree expr = *expr_p; tree type; gcc_assert (TREE_CODE (expr) == COMPONENT_REF); if (INTEGRAL_TYPE_P (TREE_TYPE (expr))) type = TREE_TYPE (get_unwidened (expr, NULL_TREE)); else type = TREE_TYPE (TREE_OPERAND (expr, 1)); /* One could argue that all the stuff below is not necessary for the non-bitfield case and declare it a FE error if type adjustment would be needed. */ if (TREE_TYPE (expr) != type) { #ifdef ENABLE_TYPES_CHECKING tree old_type = TREE_TYPE (expr); #endif int type_quals; /* We need to preserve qualifiers and propagate them from operand 0. */ type_quals = TYPE_QUALS (type) | TYPE_QUALS (TREE_TYPE (TREE_OPERAND (expr, 0))); if (TYPE_QUALS (type) != type_quals) type = build_qualified_type (TYPE_MAIN_VARIANT (type), type_quals); /* Set the type of the COMPONENT_REF to the underlying type. */ TREE_TYPE (expr) = type; #ifdef ENABLE_TYPES_CHECKING /* It is now a FE error, if the conversion from the canonical type to the original expression type is not useless. */ gcc_assert (useless_type_conversion_p (old_type, type)); #endif } } /* If a NOP conversion is changing a pointer to array of foo to a pointer to foo, embed that change in the ADDR_EXPR by converting T array[U]; (T *)&array ==> &array[L] where L is the lower bound. For simplicity, only do this for constant lower bound. The constraint is that the type of &array[L] is trivially convertible to T *. */ static void canonicalize_addr_expr (tree *expr_p) { tree expr = *expr_p; tree addr_expr = TREE_OPERAND (expr, 0); tree datype, ddatype, pddatype; /* We simplify only conversions from an ADDR_EXPR to a pointer type. */ if (!POINTER_TYPE_P (TREE_TYPE (expr)) || TREE_CODE (addr_expr) != ADDR_EXPR) return; /* The addr_expr type should be a pointer to an array. */ datype = TREE_TYPE (TREE_TYPE (addr_expr)); if (TREE_CODE (datype) != ARRAY_TYPE) return; /* The pointer to element type shall be trivially convertible to the expression pointer type. */ ddatype = TREE_TYPE (datype); pddatype = build_pointer_type (ddatype); if (!useless_type_conversion_p (TYPE_MAIN_VARIANT (TREE_TYPE (expr)), pddatype)) return; /* The lower bound and element sizes must be constant. */ if (!TYPE_SIZE_UNIT (ddatype) || TREE_CODE (TYPE_SIZE_UNIT (ddatype)) != INTEGER_CST || !TYPE_DOMAIN (datype) || !TYPE_MIN_VALUE (TYPE_DOMAIN (datype)) || TREE_CODE (TYPE_MIN_VALUE (TYPE_DOMAIN (datype))) != INTEGER_CST) return; /* All checks succeeded. Build a new node to merge the cast. */ *expr_p = build4 (ARRAY_REF, ddatype, TREE_OPERAND (addr_expr, 0), TYPE_MIN_VALUE (TYPE_DOMAIN (datype)), NULL_TREE, NULL_TREE); *expr_p = build1 (ADDR_EXPR, pddatype, *expr_p); /* We can have stripped a required restrict qualifier above. */ if (!useless_type_conversion_p (TREE_TYPE (expr), TREE_TYPE (*expr_p))) *expr_p = fold_convert (TREE_TYPE (expr), *expr_p); } /* *EXPR_P is a NOP_EXPR or CONVERT_EXPR. Remove it and/or other conversions underneath as appropriate. */ static enum gimplify_status gimplify_conversion (tree *expr_p) { location_t loc = EXPR_LOCATION (*expr_p); gcc_assert (CONVERT_EXPR_P (*expr_p)); /* Then strip away all but the outermost conversion. */ STRIP_SIGN_NOPS (TREE_OPERAND (*expr_p, 0)); /* And remove the outermost conversion if it's useless. */ if (tree_ssa_useless_type_conversion (*expr_p)) *expr_p = TREE_OPERAND (*expr_p, 0); /* If we still have a conversion at the toplevel, then canonicalize some constructs. */ if (CONVERT_EXPR_P (*expr_p)) { tree sub = TREE_OPERAND (*expr_p, 0); /* If a NOP conversion is changing the type of a COMPONENT_REF expression, then canonicalize its type now in order to expose more redundant conversions. */ if (TREE_CODE (sub) == COMPONENT_REF) canonicalize_component_ref (&TREE_OPERAND (*expr_p, 0)); /* If a NOP conversion is changing a pointer to array of foo to a pointer to foo, embed that change in the ADDR_EXPR. */ else if (TREE_CODE (sub) == ADDR_EXPR) canonicalize_addr_expr (expr_p); } /* If we have a conversion to a non-register type force the use of a VIEW_CONVERT_EXPR instead. */ if (CONVERT_EXPR_P (*expr_p) && !is_gimple_reg_type (TREE_TYPE (*expr_p))) *expr_p = fold_build1_loc (loc, VIEW_CONVERT_EXPR, TREE_TYPE (*expr_p), TREE_OPERAND (*expr_p, 0)); /* Canonicalize CONVERT_EXPR to NOP_EXPR. */ if (TREE_CODE (*expr_p) == CONVERT_EXPR) TREE_SET_CODE (*expr_p, NOP_EXPR); return GS_OK; } /* Gimplify a VAR_DECL or PARM_DECL. Return GS_OK if we expanded a DECL_VALUE_EXPR, and it's worth re-examining things. */ static enum gimplify_status gimplify_var_or_parm_decl (tree *expr_p) { tree decl = *expr_p; /* ??? If this is a local variable, and it has not been seen in any outer BIND_EXPR, then it's probably the result of a duplicate declaration, for which we've already issued an error. It would be really nice if the front end wouldn't leak these at all. Currently the only known culprit is C++ destructors, as seen in g++.old-deja/g++.jason/binding.C. Another possible culpit are size expressions for variably modified types which are lost in the FE or not gimplified correctly. */ if (VAR_P (decl) && !DECL_SEEN_IN_BIND_EXPR_P (decl) && !TREE_STATIC (decl) && !DECL_EXTERNAL (decl) && decl_function_context (decl) == current_function_decl) { gcc_assert (seen_error ()); return GS_ERROR; } /* When within an OMP context, notice uses of variables. */ if (gimplify_omp_ctxp && omp_notice_variable (gimplify_omp_ctxp, decl, true)) return GS_ALL_DONE; /* If the decl is an alias for another expression, substitute it now. */ if (DECL_HAS_VALUE_EXPR_P (decl)) { *expr_p = unshare_expr (DECL_VALUE_EXPR (decl)); return GS_OK; } return GS_ALL_DONE; } /* Recalculate the value of the TREE_SIDE_EFFECTS flag for T. */ static void recalculate_side_effects (tree t) { enum tree_code code = TREE_CODE (t); int len = TREE_OPERAND_LENGTH (t); int i; switch (TREE_CODE_CLASS (code)) { case tcc_expression: switch (code) { case INIT_EXPR: case MODIFY_EXPR: case VA_ARG_EXPR: case PREDECREMENT_EXPR: case PREINCREMENT_EXPR: case POSTDECREMENT_EXPR: case POSTINCREMENT_EXPR: /* All of these have side-effects, no matter what their operands are. */ return; default: break; } /* Fall through. */ case tcc_comparison: /* a comparison expression */ case tcc_unary: /* a unary arithmetic expression */ case tcc_binary: /* a binary arithmetic expression */ case tcc_reference: /* a reference */ case tcc_vl_exp: /* a function call */ TREE_SIDE_EFFECTS (t) = TREE_THIS_VOLATILE (t); for (i = 0; i < len; ++i) { tree op = TREE_OPERAND (t, i); if (op && TREE_SIDE_EFFECTS (op)) TREE_SIDE_EFFECTS (t) = 1; } break; case tcc_constant: /* No side-effects. */ return; default: gcc_unreachable (); } } /* Gimplify the COMPONENT_REF, ARRAY_REF, REALPART_EXPR or IMAGPART_EXPR node *EXPR_P. compound_lval : min_lval '[' val ']' | min_lval '.' ID | compound_lval '[' val ']' | compound_lval '.' ID This is not part of the original SIMPLE definition, which separates array and member references, but it seems reasonable to handle them together. Also, this way we don't run into problems with union aliasing; gcc requires that for accesses through a union to alias, the union reference must be explicit, which was not always the case when we were splitting up array and member refs. PRE_P points to the sequence where side effects that must happen before *EXPR_P should be stored. POST_P points to the sequence where side effects that must happen after *EXPR_P should be stored. */ static enum gimplify_status gimplify_compound_lval (tree *expr_p, gimple_seq *pre_p, gimple_seq *post_p, fallback_t fallback) { tree *p; enum gimplify_status ret = GS_ALL_DONE, tret; int i; location_t loc = EXPR_LOCATION (*expr_p); tree expr = *expr_p; /* Create a stack of the subexpressions so later we can walk them in order from inner to outer. */ auto_vec expr_stack; /* We can handle anything that get_inner_reference can deal with. */ for (p = expr_p; ; p = &TREE_OPERAND (*p, 0)) { restart: /* Fold INDIRECT_REFs now to turn them into ARRAY_REFs. */ if (TREE_CODE (*p) == INDIRECT_REF) *p = fold_indirect_ref_loc (loc, *p); if (handled_component_p (*p)) ; /* Expand DECL_VALUE_EXPR now. In some cases that may expose additional COMPONENT_REFs. */ else if ((VAR_P (*p) || TREE_CODE (*p) == PARM_DECL) && gimplify_var_or_parm_decl (p) == GS_OK) goto restart; else break; expr_stack.safe_push (*p); } gcc_assert (expr_stack.length ()); /* Now EXPR_STACK is a stack of pointers to all the refs we've walked through and P points to the innermost expression. Java requires that we elaborated nodes in source order. That means we must gimplify the inner expression followed by each of the indices, in order. But we can't gimplify the inner expression until we deal with any variable bounds, sizes, or positions in order to deal with PLACEHOLDER_EXPRs. The base expression may contain a statement expression that has declarations used in size expressions, so has to be gimplified before gimplifying the size expressions. So we do this in three steps. First we deal with variable bounds, sizes, and positions, then we gimplify the base and ensure it is memory if needed, then we deal with the annotations for any variables in the components and any indices, from left to right. */ bool need_non_reg = false; for (i = expr_stack.length () - 1; i >= 0; i--) { tree t = expr_stack[i]; if (TREE_CODE (t) == ARRAY_REF || TREE_CODE (t) == ARRAY_RANGE_REF) { /* Deal with the low bound and element type size and put them into the ARRAY_REF. If these values are set, they have already been gimplified. */ if (TREE_OPERAND (t, 2) == NULL_TREE) { tree low = unshare_expr (array_ref_low_bound (t)); if (!is_gimple_min_invariant (low)) { TREE_OPERAND (t, 2) = low; } } if (TREE_OPERAND (t, 3) == NULL_TREE) { tree elmt_size = array_ref_element_size (t); if (!is_gimple_min_invariant (elmt_size)) { elmt_size = unshare_expr (elmt_size); tree elmt_type = TREE_TYPE (TREE_TYPE (TREE_OPERAND (t, 0))); tree factor = size_int (TYPE_ALIGN_UNIT (elmt_type)); /* Divide the element size by the alignment of the element type (above). */ elmt_size = size_binop_loc (loc, EXACT_DIV_EXPR, elmt_size, factor); TREE_OPERAND (t, 3) = elmt_size; } } need_non_reg = true; } else if (TREE_CODE (t) == COMPONENT_REF) { /* Set the field offset into T and gimplify it. */ if (TREE_OPERAND (t, 2) == NULL_TREE) { tree offset = component_ref_field_offset (t); if (!is_gimple_min_invariant (offset)) { offset = unshare_expr (offset); tree field = TREE_OPERAND (t, 1); tree factor = size_int (DECL_OFFSET_ALIGN (field) / BITS_PER_UNIT); /* Divide the offset by its alignment. */ offset = size_binop_loc (loc, EXACT_DIV_EXPR, offset, factor); TREE_OPERAND (t, 2) = offset; } } need_non_reg = true; } } /* Step 2 is to gimplify the base expression. Make sure lvalue is set so as to match the min_lval predicate. Failure to do so may result in the creation of large aggregate temporaries. */ tret = gimplify_expr (p, pre_p, post_p, is_gimple_min_lval, fallback | fb_lvalue); ret = MIN (ret, tret); /* Step 2a: if we have component references we do not support on registers then make sure the base isn't a register. Of course we can only do so if an rvalue is OK. */ if (need_non_reg && (fallback & fb_rvalue)) prepare_gimple_addressable (p, pre_p); /* Step 3: gimplify size expressions and the indices and operands of ARRAY_REF. During this loop we also remove any useless conversions. */ for (; expr_stack.length () > 0; ) { tree t = expr_stack.pop (); if (TREE_CODE (t) == ARRAY_REF || TREE_CODE (t) == ARRAY_RANGE_REF) { /* Gimplify the low bound and element type size. */ tret = gimplify_expr (&TREE_OPERAND (t, 2), pre_p, post_p, is_gimple_reg, fb_rvalue); ret = MIN (ret, tret); tret = gimplify_expr (&TREE_OPERAND (t, 3), pre_p, post_p, is_gimple_reg, fb_rvalue); ret = MIN (ret, tret); /* Gimplify the dimension. */ tret = gimplify_expr (&TREE_OPERAND (t, 1), pre_p, post_p, is_gimple_val, fb_rvalue); ret = MIN (ret, tret); } else if (TREE_CODE (t) == COMPONENT_REF) { tret = gimplify_expr (&TREE_OPERAND (t, 2), pre_p, post_p, is_gimple_reg, fb_rvalue); ret = MIN (ret, tret); } STRIP_USELESS_TYPE_CONVERSION (TREE_OPERAND (t, 0)); /* The innermost expression P may have originally had TREE_SIDE_EFFECTS set which would have caused all the outer expressions in *EXPR_P leading to P to also have had TREE_SIDE_EFFECTS set. */ recalculate_side_effects (t); } /* If the outermost expression is a COMPONENT_REF, canonicalize its type. */ if ((fallback & fb_rvalue) && TREE_CODE (*expr_p) == COMPONENT_REF) { canonicalize_component_ref (expr_p); } expr_stack.release (); gcc_assert (*expr_p == expr || ret != GS_ALL_DONE); return ret; } /* Gimplify the self modifying expression pointed to by EXPR_P (++, --, +=, -=). PRE_P points to the list where side effects that must happen before *EXPR_P should be stored. POST_P points to the list where side effects that must happen after *EXPR_P should be stored. WANT_VALUE is nonzero iff we want to use the value of this expression in another expression. ARITH_TYPE is the type the computation should be performed in. */ enum gimplify_status gimplify_self_mod_expr (tree *expr_p, gimple_seq *pre_p, gimple_seq *post_p, bool want_value, tree arith_type) { enum tree_code code; tree lhs, lvalue, rhs, t1; gimple_seq post = NULL, *orig_post_p = post_p; bool postfix; enum tree_code arith_code; enum gimplify_status ret; location_t loc = EXPR_LOCATION (*expr_p); code = TREE_CODE (*expr_p); gcc_assert (code == POSTINCREMENT_EXPR || code == POSTDECREMENT_EXPR || code == PREINCREMENT_EXPR || code == PREDECREMENT_EXPR); /* Prefix or postfix? */ if (code == POSTINCREMENT_EXPR || code == POSTDECREMENT_EXPR) /* Faster to treat as prefix if result is not used. */ postfix = want_value; else postfix = false; /* For postfix, make sure the inner expression's post side effects are executed after side effects from this expression. */ if (postfix) post_p = &post; /* Add or subtract? */ if (code == PREINCREMENT_EXPR || code == POSTINCREMENT_EXPR) arith_code = PLUS_EXPR; else arith_code = MINUS_EXPR; /* Gimplify the LHS into a GIMPLE lvalue. */ lvalue = TREE_OPERAND (*expr_p, 0); ret = gimplify_expr (&lvalue, pre_p, post_p, is_gimple_lvalue, fb_lvalue); if (ret == GS_ERROR) return ret; /* Extract the operands to the arithmetic operation. */ lhs = lvalue; rhs = TREE_OPERAND (*expr_p, 1); /* For postfix operator, we evaluate the LHS to an rvalue and then use that as the result value and in the postqueue operation. */ if (postfix) { ret = gimplify_expr (&lhs, pre_p, post_p, is_gimple_val, fb_rvalue); if (ret == GS_ERROR) return ret; lhs = get_initialized_tmp_var (lhs, pre_p); } /* For POINTERs increment, use POINTER_PLUS_EXPR. */ if (POINTER_TYPE_P (TREE_TYPE (lhs))) { rhs = convert_to_ptrofftype_loc (loc, rhs); if (arith_code == MINUS_EXPR) rhs = fold_build1_loc (loc, NEGATE_EXPR, TREE_TYPE (rhs), rhs); t1 = fold_build2 (POINTER_PLUS_EXPR, TREE_TYPE (*expr_p), lhs, rhs); } else t1 = fold_convert (TREE_TYPE (*expr_p), fold_build2 (arith_code, arith_type, fold_convert (arith_type, lhs), fold_convert (arith_type, rhs))); if (postfix) { gimplify_assign (lvalue, t1, pre_p); gimplify_seq_add_seq (orig_post_p, post); *expr_p = lhs; return GS_ALL_DONE; } else { *expr_p = build2 (MODIFY_EXPR, TREE_TYPE (lvalue), lvalue, t1); return GS_OK; } } /* If *EXPR_P has a variable sized type, wrap it in a WITH_SIZE_EXPR. */ static void maybe_with_size_expr (tree *expr_p) { tree expr = *expr_p; tree type = TREE_TYPE (expr); tree size; /* If we've already wrapped this or the type is error_mark_node, we can't do anything. */ if (TREE_CODE (expr) == WITH_SIZE_EXPR || type == error_mark_node) return; /* If the size isn't known or is a constant, we have nothing to do. */ size = TYPE_SIZE_UNIT (type); if (!size || poly_int_tree_p (size)) return; /* Otherwise, make a WITH_SIZE_EXPR. */ size = unshare_expr (size); size = SUBSTITUTE_PLACEHOLDER_IN_EXPR (size, expr); *expr_p = build2 (WITH_SIZE_EXPR, type, expr, size); } /* Helper for gimplify_call_expr. Gimplify a single argument *ARG_P Store any side-effects in PRE_P. CALL_LOCATION is the location of the CALL_EXPR. If ALLOW_SSA is set the actual parameter may be gimplified to an SSA name. */ enum gimplify_status gimplify_arg (tree *arg_p, gimple_seq *pre_p, location_t call_location, bool allow_ssa) { bool (*test) (tree); fallback_t fb; /* In general, we allow lvalues for function arguments to avoid extra overhead of copying large aggregates out of even larger aggregates into temporaries only to copy the temporaries to the argument list. Make optimizers happy by pulling out to temporaries those types that fit in registers. */ if (is_gimple_reg_type (TREE_TYPE (*arg_p))) test = is_gimple_val, fb = fb_rvalue; else { test = is_gimple_lvalue, fb = fb_either; /* Also strip a TARGET_EXPR that would force an extra copy. */ if (TREE_CODE (*arg_p) == TARGET_EXPR) { tree init = TARGET_EXPR_INITIAL (*arg_p); if (init && !VOID_TYPE_P (TREE_TYPE (init))) *arg_p = init; } } /* If this is a variable sized type, we must remember the size. */ maybe_with_size_expr (arg_p); /* FIXME diagnostics: This will mess up gcc.dg/Warray-bounds.c. */ /* Make sure arguments have the same location as the function call itself. */ protected_set_expr_location (*arg_p, call_location); /* There is a sequence point before a function call. Side effects in the argument list must occur before the actual call. So, when gimplifying arguments, force gimplify_expr to use an internal post queue which is then appended to the end of PRE_P. */ return gimplify_expr (arg_p, pre_p, NULL, test, fb, allow_ssa); } /* Don't fold inside offloading or taskreg regions: it can break code by adding decl references that weren't in the source. We'll do it during omplower pass instead. */ static bool maybe_fold_stmt (gimple_stmt_iterator *gsi) { struct gimplify_omp_ctx *ctx; for (ctx = gimplify_omp_ctxp; ctx; ctx = ctx->outer_context) if ((ctx->region_type & (ORT_TARGET | ORT_PARALLEL | ORT_TASK)) != 0) return false; else if ((ctx->region_type & ORT_HOST_TEAMS) == ORT_HOST_TEAMS) return false; /* Delay folding of builtins until the IL is in consistent state so the diagnostic machinery can do a better job. */ if (gimple_call_builtin_p (gsi_stmt (*gsi))) return false; return fold_stmt (gsi); } /* Gimplify the CALL_EXPR node *EXPR_P into the GIMPLE sequence PRE_P. WANT_VALUE is true if the result of the call is desired. */ static enum gimplify_status gimplify_call_expr (tree *expr_p, gimple_seq *pre_p, bool want_value) { tree fndecl, parms, p, fnptrtype; enum gimplify_status ret; int i, nargs; gcall *call; bool builtin_va_start_p = false; location_t loc = EXPR_LOCATION (*expr_p); gcc_assert (TREE_CODE (*expr_p) == CALL_EXPR); /* For reliable diagnostics during inlining, it is necessary that every call_expr be annotated with file and line. */ if (! EXPR_HAS_LOCATION (*expr_p)) SET_EXPR_LOCATION (*expr_p, input_location); /* Gimplify internal functions created in the FEs. */ if (CALL_EXPR_FN (*expr_p) == NULL_TREE) { if (want_value) return GS_ALL_DONE; nargs = call_expr_nargs (*expr_p); enum internal_fn ifn = CALL_EXPR_IFN (*expr_p); auto_vec vargs (nargs); for (i = 0; i < nargs; i++) { gimplify_arg (&CALL_EXPR_ARG (*expr_p, i), pre_p, EXPR_LOCATION (*expr_p)); vargs.quick_push (CALL_EXPR_ARG (*expr_p, i)); } gcall *call = gimple_build_call_internal_vec (ifn, vargs); gimple_call_set_nothrow (call, TREE_NOTHROW (*expr_p)); gimplify_seq_add_stmt (pre_p, call); return GS_ALL_DONE; } /* This may be a call to a builtin function. Builtin function calls may be transformed into different (and more efficient) builtin function calls under certain circumstances. Unfortunately, gimplification can muck things up enough that the builtin expanders are not aware that certain transformations are still valid. So we attempt transformation/gimplification of the call before we gimplify the CALL_EXPR. At this time we do not manage to transform all calls in the same manner as the expanders do, but we do transform most of them. */ fndecl = get_callee_fndecl (*expr_p); if (fndecl && fndecl_built_in_p (fndecl, BUILT_IN_NORMAL)) switch (DECL_FUNCTION_CODE (fndecl)) { CASE_BUILT_IN_ALLOCA: /* If the call has been built for a variable-sized object, then we want to restore the stack level when the enclosing BIND_EXPR is exited to reclaim the allocated space; otherwise, we precisely need to do the opposite and preserve the latest stack level. */ if (CALL_ALLOCA_FOR_VAR_P (*expr_p)) gimplify_ctxp->save_stack = true; else gimplify_ctxp->keep_stack = true; break; case BUILT_IN_VA_START: { builtin_va_start_p = TRUE; if (call_expr_nargs (*expr_p) < 2) { error ("too few arguments to function %"); *expr_p = build_empty_stmt (EXPR_LOCATION (*expr_p)); return GS_OK; } if (fold_builtin_next_arg (*expr_p, true)) { *expr_p = build_empty_stmt (EXPR_LOCATION (*expr_p)); return GS_OK; } break; } case BUILT_IN_EH_RETURN: cfun->calls_eh_return = true; break; case BUILT_IN_CLEAR_PADDING: if (call_expr_nargs (*expr_p) == 1) { /* Remember the original type of the argument in an internal dummy second argument, as in GIMPLE pointer conversions are useless. Also mark this call as not for automatic initialization in the internal dummy third argument. */ p = CALL_EXPR_ARG (*expr_p, 0); *expr_p = build_call_expr_loc (EXPR_LOCATION (*expr_p), fndecl, 2, p, build_zero_cst (TREE_TYPE (p))); return GS_OK; } break; default: ; } if (fndecl && fndecl_built_in_p (fndecl)) { tree new_tree = fold_call_expr (input_location, *expr_p, !want_value); if (new_tree && new_tree != *expr_p) { /* There was a transformation of this call which computes the same value, but in a more efficient way. Return and try again. */ *expr_p = new_tree; return GS_OK; } } /* Remember the original function pointer type. */ fnptrtype = TREE_TYPE (CALL_EXPR_FN (*expr_p)); if (flag_openmp && fndecl && cfun && (cfun->curr_properties & PROP_gimple_any) == 0) { tree variant = omp_resolve_declare_variant (fndecl); if (variant != fndecl) CALL_EXPR_FN (*expr_p) = build1 (ADDR_EXPR, fnptrtype, variant); } /* There is a sequence point before the call, so any side effects in the calling expression must occur before the actual call. Force gimplify_expr to use an internal post queue. */ ret = gimplify_expr (&CALL_EXPR_FN (*expr_p), pre_p, NULL, is_gimple_call_addr, fb_rvalue); nargs = call_expr_nargs (*expr_p); /* Get argument types for verification. */ fndecl = get_callee_fndecl (*expr_p); parms = NULL_TREE; if (fndecl) parms = TYPE_ARG_TYPES (TREE_TYPE (fndecl)); else parms = TYPE_ARG_TYPES (TREE_TYPE (fnptrtype)); if (fndecl && DECL_ARGUMENTS (fndecl)) p = DECL_ARGUMENTS (fndecl); else if (parms) p = parms; else p = NULL_TREE; for (i = 0; i < nargs && p; i++, p = TREE_CHAIN (p)) ; /* If the last argument is __builtin_va_arg_pack () and it is not passed as a named argument, decrease the number of CALL_EXPR arguments and set instead the CALL_EXPR_VA_ARG_PACK flag. */ if (!p && i < nargs && TREE_CODE (CALL_EXPR_ARG (*expr_p, nargs - 1)) == CALL_EXPR) { tree last_arg = CALL_EXPR_ARG (*expr_p, nargs - 1); tree last_arg_fndecl = get_callee_fndecl (last_arg); if (last_arg_fndecl && fndecl_built_in_p (last_arg_fndecl, BUILT_IN_VA_ARG_PACK)) { tree call = *expr_p; --nargs; *expr_p = build_call_array_loc (loc, TREE_TYPE (call), CALL_EXPR_FN (call), nargs, CALL_EXPR_ARGP (call)); /* Copy all CALL_EXPR flags, location and block, except CALL_EXPR_VA_ARG_PACK flag. */ CALL_EXPR_STATIC_CHAIN (*expr_p) = CALL_EXPR_STATIC_CHAIN (call); CALL_EXPR_TAILCALL (*expr_p) = CALL_EXPR_TAILCALL (call); CALL_EXPR_RETURN_SLOT_OPT (*expr_p) = CALL_EXPR_RETURN_SLOT_OPT (call); CALL_FROM_THUNK_P (*expr_p) = CALL_FROM_THUNK_P (call); SET_EXPR_LOCATION (*expr_p, EXPR_LOCATION (call)); /* Set CALL_EXPR_VA_ARG_PACK. */ CALL_EXPR_VA_ARG_PACK (*expr_p) = 1; } } /* If the call returns twice then after building the CFG the call argument computations will no longer dominate the call because we add an abnormal incoming edge to the call. So do not use SSA vars there. */ bool returns_twice = call_expr_flags (*expr_p) & ECF_RETURNS_TWICE; /* Gimplify the function arguments. */ if (nargs > 0) { for (i = (PUSH_ARGS_REVERSED ? nargs - 1 : 0); PUSH_ARGS_REVERSED ? i >= 0 : i < nargs; PUSH_ARGS_REVERSED ? i-- : i++) { enum gimplify_status t; /* Avoid gimplifying the second argument to va_start, which needs to be the plain PARM_DECL. */ if ((i != 1) || !builtin_va_start_p) { t = gimplify_arg (&CALL_EXPR_ARG (*expr_p, i), pre_p, EXPR_LOCATION (*expr_p), ! returns_twice); if (t == GS_ERROR) ret = GS_ERROR; } } } /* Gimplify the static chain. */ if (CALL_EXPR_STATIC_CHAIN (*expr_p)) { if (fndecl && !DECL_STATIC_CHAIN (fndecl)) CALL_EXPR_STATIC_CHAIN (*expr_p) = NULL; else { enum gimplify_status t; t = gimplify_arg (&CALL_EXPR_STATIC_CHAIN (*expr_p), pre_p, EXPR_LOCATION (*expr_p), ! returns_twice); if (t == GS_ERROR) ret = GS_ERROR; } } /* Verify the function result. */ if (want_value && fndecl && VOID_TYPE_P (TREE_TYPE (TREE_TYPE (fnptrtype)))) { error_at (loc, "using result of function returning %"); ret = GS_ERROR; } /* Try this again in case gimplification exposed something. */ if (ret != GS_ERROR) { tree new_tree = fold_call_expr (input_location, *expr_p, !want_value); if (new_tree && new_tree != *expr_p) { /* There was a transformation of this call which computes the same value, but in a more efficient way. Return and try again. */ *expr_p = new_tree; return GS_OK; } } else { *expr_p = error_mark_node; return GS_ERROR; } /* If the function is "const" or "pure", then clear TREE_SIDE_EFFECTS on its decl. This allows us to eliminate redundant or useless calls to "const" functions. */ if (TREE_CODE (*expr_p) == CALL_EXPR) { int flags = call_expr_flags (*expr_p); if (flags & (ECF_CONST | ECF_PURE) /* An infinite loop is considered a side effect. */ && !(flags & (ECF_LOOPING_CONST_OR_PURE))) TREE_SIDE_EFFECTS (*expr_p) = 0; } /* If the value is not needed by the caller, emit a new GIMPLE_CALL and clear *EXPR_P. Otherwise, leave *EXPR_P in its gimplified form and delegate the creation of a GIMPLE_CALL to gimplify_modify_expr. This is always possible because when WANT_VALUE is true, the caller wants the result of this call into a temporary, which means that we will emit an INIT_EXPR in internal_get_tmp_var which will then be handled by gimplify_modify_expr. */ if (!want_value) { /* The CALL_EXPR in *EXPR_P is already in GIMPLE form, so all we have to do is replicate it as a GIMPLE_CALL tuple. */ gimple_stmt_iterator gsi; call = gimple_build_call_from_tree (*expr_p, fnptrtype); notice_special_calls (call); gimplify_seq_add_stmt (pre_p, call); gsi = gsi_last (*pre_p); maybe_fold_stmt (&gsi); *expr_p = NULL_TREE; } else /* Remember the original function type. */ CALL_EXPR_FN (*expr_p) = build1 (NOP_EXPR, fnptrtype, CALL_EXPR_FN (*expr_p)); return ret; } /* Handle shortcut semantics in the predicate operand of a COND_EXPR by rewriting it into multiple COND_EXPRs, and possibly GOTO_EXPRs. TRUE_LABEL_P and FALSE_LABEL_P point to the labels to jump to if the condition is true or false, respectively. If null, we should generate our own to skip over the evaluation of this specific expression. LOCUS is the source location of the COND_EXPR. This function is the tree equivalent of do_jump. shortcut_cond_r should only be called by shortcut_cond_expr. */ static tree shortcut_cond_r (tree pred, tree *true_label_p, tree *false_label_p, location_t locus) { tree local_label = NULL_TREE; tree t, expr = NULL; /* OK, it's not a simple case; we need to pull apart the COND_EXPR to retain the shortcut semantics. Just insert the gotos here; shortcut_cond_expr will append the real blocks later. */ if (TREE_CODE (pred) == TRUTH_ANDIF_EXPR) { location_t new_locus; /* Turn if (a && b) into if (a); else goto no; if (b) goto yes; else goto no; (no:) */ if (false_label_p == NULL) false_label_p = &local_label; /* Keep the original source location on the first 'if'. */ t = shortcut_cond_r (TREE_OPERAND (pred, 0), NULL, false_label_p, locus); append_to_statement_list (t, &expr); /* Set the source location of the && on the second 'if'. */ new_locus = rexpr_location (pred, locus); t = shortcut_cond_r (TREE_OPERAND (pred, 1), true_label_p, false_label_p, new_locus); append_to_statement_list (t, &expr); } else if (TREE_CODE (pred) == TRUTH_ORIF_EXPR) { location_t new_locus; /* Turn if (a || b) into if (a) goto yes; if (b) goto yes; else goto no; (yes:) */ if (true_label_p == NULL) true_label_p = &local_label; /* Keep the original source location on the first 'if'. */ t = shortcut_cond_r (TREE_OPERAND (pred, 0), true_label_p, NULL, locus); append_to_statement_list (t, &expr); /* Set the source location of the || on the second 'if'. */ new_locus = rexpr_location (pred, locus); t = shortcut_cond_r (TREE_OPERAND (pred, 1), true_label_p, false_label_p, new_locus); append_to_statement_list (t, &expr); } else if (TREE_CODE (pred) == COND_EXPR && !VOID_TYPE_P (TREE_TYPE (TREE_OPERAND (pred, 1))) && !VOID_TYPE_P (TREE_TYPE (TREE_OPERAND (pred, 2)))) { location_t new_locus; /* As long as we're messing with gotos, turn if (a ? b : c) into if (a) if (b) goto yes; else goto no; else if (c) goto yes; else goto no; Don't do this if one of the arms has void type, which can happen in C++ when the arm is throw. */ /* Keep the original source location on the first 'if'. Set the source location of the ? on the second 'if'. */ new_locus = rexpr_location (pred, locus); expr = build3 (COND_EXPR, void_type_node, TREE_OPERAND (pred, 0), shortcut_cond_r (TREE_OPERAND (pred, 1), true_label_p, false_label_p, locus), shortcut_cond_r (TREE_OPERAND (pred, 2), true_label_p, false_label_p, new_locus)); } else { expr = build3 (COND_EXPR, void_type_node, pred, build_and_jump (true_label_p), build_and_jump (false_label_p)); SET_EXPR_LOCATION (expr, locus); } if (local_label) { t = build1 (LABEL_EXPR, void_type_node, local_label); append_to_statement_list (t, &expr); } return expr; } /* If EXPR is a GOTO_EXPR, return it. If it is a STATEMENT_LIST, skip any of its leading DEBUG_BEGIN_STMTS and recurse on the subsequent statement, if it is the last one. Otherwise, return NULL. */ static tree find_goto (tree expr) { if (!expr) return NULL_TREE; if (TREE_CODE (expr) == GOTO_EXPR) return expr; if (TREE_CODE (expr) != STATEMENT_LIST) return NULL_TREE; tree_stmt_iterator i = tsi_start (expr); while (!tsi_end_p (i) && TREE_CODE (tsi_stmt (i)) == DEBUG_BEGIN_STMT) tsi_next (&i); if (!tsi_one_before_end_p (i)) return NULL_TREE; return find_goto (tsi_stmt (i)); } /* Same as find_goto, except that it returns NULL if the destination is not a LABEL_DECL. */ static inline tree find_goto_label (tree expr) { tree dest = find_goto (expr); if (dest && TREE_CODE (GOTO_DESTINATION (dest)) == LABEL_DECL) return dest; return NULL_TREE; } /* Given a conditional expression EXPR with short-circuit boolean predicates using TRUTH_ANDIF_EXPR or TRUTH_ORIF_EXPR, break the predicate apart into the equivalent sequence of conditionals. */ static tree shortcut_cond_expr (tree expr) { tree pred = TREE_OPERAND (expr, 0); tree then_ = TREE_OPERAND (expr, 1); tree else_ = TREE_OPERAND (expr, 2); tree true_label, false_label, end_label, t; tree *true_label_p; tree *false_label_p; bool emit_end, emit_false, jump_over_else; bool then_se = then_ && TREE_SIDE_EFFECTS (then_); bool else_se = else_ && TREE_SIDE_EFFECTS (else_); /* First do simple transformations. */ if (!else_se) { /* If there is no 'else', turn if (a && b) then c into if (a) if (b) then c. */ while (TREE_CODE (pred) == TRUTH_ANDIF_EXPR) { /* Keep the original source location on the first 'if'. */ location_t locus = EXPR_LOC_OR_LOC (expr, input_location); TREE_OPERAND (expr, 0) = TREE_OPERAND (pred, 1); /* Set the source location of the && on the second 'if'. */ if (rexpr_has_location (pred)) SET_EXPR_LOCATION (expr, rexpr_location (pred)); then_ = shortcut_cond_expr (expr); then_se = then_ && TREE_SIDE_EFFECTS (then_); pred = TREE_OPERAND (pred, 0); expr = build3 (COND_EXPR, void_type_node, pred, then_, NULL_TREE); SET_EXPR_LOCATION (expr, locus); } } if (!then_se) { /* If there is no 'then', turn if (a || b); else d into if (a); else if (b); else d. */ while (TREE_CODE (pred) == TRUTH_ORIF_EXPR) { /* Keep the original source location on the first 'if'. */ location_t locus = EXPR_LOC_OR_LOC (expr, input_location); TREE_OPERAND (expr, 0) = TREE_OPERAND (pred, 1); /* Set the source location of the || on the second 'if'. */ if (rexpr_has_location (pred)) SET_EXPR_LOCATION (expr, rexpr_location (pred)); else_ = shortcut_cond_expr (expr); else_se = else_ && TREE_SIDE_EFFECTS (else_); pred = TREE_OPERAND (pred, 0); expr = build3 (COND_EXPR, void_type_node, pred, NULL_TREE, else_); SET_EXPR_LOCATION (expr, locus); } } /* If we're done, great. */ if (TREE_CODE (pred) != TRUTH_ANDIF_EXPR && TREE_CODE (pred) != TRUTH_ORIF_EXPR) return expr; /* Otherwise we need to mess with gotos. Change if (a) c; else d; to if (a); else goto no; c; goto end; no: d; end: and recursively gimplify the condition. */ true_label = false_label = end_label = NULL_TREE; /* If our arms just jump somewhere, hijack those labels so we don't generate jumps to jumps. */ if (tree then_goto = find_goto_label (then_)) { true_label = GOTO_DESTINATION (then_goto); then_ = NULL; then_se = false; } if (tree else_goto = find_goto_label (else_)) { false_label = GOTO_DESTINATION (else_goto); else_ = NULL; else_se = false; } /* If we aren't hijacking a label for the 'then' branch, it falls through. */ if (true_label) true_label_p = &true_label; else true_label_p = NULL; /* The 'else' branch also needs a label if it contains interesting code. */ if (false_label || else_se) false_label_p = &false_label; else false_label_p = NULL; /* If there was nothing else in our arms, just forward the label(s). */ if (!then_se && !else_se) return shortcut_cond_r (pred, true_label_p, false_label_p, EXPR_LOC_OR_LOC (expr, input_location)); /* If our last subexpression already has a terminal label, reuse it. */ if (else_se) t = expr_last (else_); else if (then_se) t = expr_last (then_); else t = NULL; if (t && TREE_CODE (t) == LABEL_EXPR) end_label = LABEL_EXPR_LABEL (t); /* If we don't care about jumping to the 'else' branch, jump to the end if the condition is false. */ if (!false_label_p) false_label_p = &end_label; /* We only want to emit these labels if we aren't hijacking them. */ emit_end = (end_label == NULL_TREE); emit_false = (false_label == NULL_TREE); /* We only emit the jump over the else clause if we have to--if the then clause may fall through. Otherwise we can wind up with a useless jump and a useless label at the end of gimplified code, which will cause us to think that this conditional as a whole falls through even if it doesn't. If we then inline a function which ends with such a condition, that can cause us to issue an inappropriate warning about control reaching the end of a non-void function. */ jump_over_else = block_may_fallthru (then_); pred = shortcut_cond_r (pred, true_label_p, false_label_p, EXPR_LOC_OR_LOC (expr, input_location)); expr = NULL; append_to_statement_list (pred, &expr); append_to_statement_list (then_, &expr); if (else_se) { if (jump_over_else) { tree last = expr_last (expr); t = build_and_jump (&end_label); if (rexpr_has_location (last)) SET_EXPR_LOCATION (t, rexpr_location (last)); append_to_statement_list (t, &expr); } if (emit_false) { t = build1 (LABEL_EXPR, void_type_node, false_label); append_to_statement_list (t, &expr); } append_to_statement_list (else_, &expr); } if (emit_end && end_label) { t = build1 (LABEL_EXPR, void_type_node, end_label); append_to_statement_list (t, &expr); } return expr; } /* EXPR is used in a boolean context; make sure it has BOOLEAN_TYPE. */ tree gimple_boolify (tree expr) { tree type = TREE_TYPE (expr); location_t loc = EXPR_LOCATION (expr); if (TREE_CODE (expr) == NE_EXPR && TREE_CODE (TREE_OPERAND (expr, 0)) == CALL_EXPR && integer_zerop (TREE_OPERAND (expr, 1))) { tree call = TREE_OPERAND (expr, 0); tree fn = get_callee_fndecl (call); /* For __builtin_expect ((long) (x), y) recurse into x as well if x is truth_value_p. */ if (fn && fndecl_built_in_p (fn, BUILT_IN_EXPECT) && call_expr_nargs (call) == 2) { tree arg = CALL_EXPR_ARG (call, 0); if (arg) { if (TREE_CODE (arg) == NOP_EXPR && TREE_TYPE (arg) == TREE_TYPE (call)) arg = TREE_OPERAND (arg, 0); if (truth_value_p (TREE_CODE (arg))) { arg = gimple_boolify (arg); CALL_EXPR_ARG (call, 0) = fold_convert_loc (loc, TREE_TYPE (call), arg); } } } } switch (TREE_CODE (expr)) { case TRUTH_AND_EXPR: case TRUTH_OR_EXPR: case TRUTH_XOR_EXPR: case TRUTH_ANDIF_EXPR: case TRUTH_ORIF_EXPR: /* Also boolify the arguments of truth exprs. */ TREE_OPERAND (expr, 1) = gimple_boolify (TREE_OPERAND (expr, 1)); /* FALLTHRU */ case TRUTH_NOT_EXPR: TREE_OPERAND (expr, 0) = gimple_boolify (TREE_OPERAND (expr, 0)); /* These expressions always produce boolean results. */ if (TREE_CODE (type) != BOOLEAN_TYPE) TREE_TYPE (expr) = boolean_type_node; return expr; case ANNOTATE_EXPR: switch ((enum annot_expr_kind) TREE_INT_CST_LOW (TREE_OPERAND (expr, 1))) { case annot_expr_ivdep_kind: case annot_expr_unroll_kind: case annot_expr_no_vector_kind: case annot_expr_vector_kind: case annot_expr_parallel_kind: TREE_OPERAND (expr, 0) = gimple_boolify (TREE_OPERAND (expr, 0)); if (TREE_CODE (type) != BOOLEAN_TYPE) TREE_TYPE (expr) = boolean_type_node; return expr; default: gcc_unreachable (); } default: if (COMPARISON_CLASS_P (expr)) { /* There expressions always prduce boolean results. */ if (TREE_CODE (type) != BOOLEAN_TYPE) TREE_TYPE (expr) = boolean_type_node; return expr; } /* Other expressions that get here must have boolean values, but might need to be converted to the appropriate mode. */ if (TREE_CODE (type) == BOOLEAN_TYPE) return expr; return fold_convert_loc (loc, boolean_type_node, expr); } } /* Given a conditional expression *EXPR_P without side effects, gimplify its operands. New statements are inserted to PRE_P. */ static enum gimplify_status gimplify_pure_cond_expr (tree *expr_p, gimple_seq *pre_p) { tree expr = *expr_p, cond; enum gimplify_status ret, tret; enum tree_code code; cond = gimple_boolify (COND_EXPR_COND (expr)); /* We need to handle && and || specially, as their gimplification creates pure cond_expr, thus leading to an infinite cycle otherwise. */ code = TREE_CODE (cond); if (code == TRUTH_ANDIF_EXPR) TREE_SET_CODE (cond, TRUTH_AND_EXPR); else if (code == TRUTH_ORIF_EXPR) TREE_SET_CODE (cond, TRUTH_OR_EXPR); ret = gimplify_expr (&cond, pre_p, NULL, is_gimple_condexpr, fb_rvalue); COND_EXPR_COND (*expr_p) = cond; tret = gimplify_expr (&COND_EXPR_THEN (expr), pre_p, NULL, is_gimple_val, fb_rvalue); ret = MIN (ret, tret); tret = gimplify_expr (&COND_EXPR_ELSE (expr), pre_p, NULL, is_gimple_val, fb_rvalue); return MIN (ret, tret); } /* Return true if evaluating EXPR could trap. EXPR is GENERIC, while tree_could_trap_p can be called only on GIMPLE. */ bool generic_expr_could_trap_p (tree expr) { unsigned i, n; if (!expr || is_gimple_val (expr)) return false; if (!EXPR_P (expr) || tree_could_trap_p (expr)) return true; n = TREE_OPERAND_LENGTH (expr); for (i = 0; i < n; i++) if (generic_expr_could_trap_p (TREE_OPERAND (expr, i))) return true; return false; } /* Convert the conditional expression pointed to by EXPR_P '(p) ? a : b;' into if (p) if (p) t1 = a; a; else or else t1 = b; b; t1; The second form is used when *EXPR_P is of type void. PRE_P points to the list where side effects that must happen before *EXPR_P should be stored. */ static enum gimplify_status gimplify_cond_expr (tree *expr_p, gimple_seq *pre_p, fallback_t fallback) { tree expr = *expr_p; tree type = TREE_TYPE (expr); location_t loc = EXPR_LOCATION (expr); tree tmp, arm1, arm2; enum gimplify_status ret; tree label_true, label_false, label_cont; bool have_then_clause_p, have_else_clause_p; gcond *cond_stmt; enum tree_code pred_code; gimple_seq seq = NULL; /* If this COND_EXPR has a value, copy the values into a temporary within the arms. */ if (!VOID_TYPE_P (type)) { tree then_ = TREE_OPERAND (expr, 1), else_ = TREE_OPERAND (expr, 2); tree result; /* If either an rvalue is ok or we do not require an lvalue, create the temporary. But we cannot do that if the type is addressable. */ if (((fallback & fb_rvalue) || !(fallback & fb_lvalue)) && !TREE_ADDRESSABLE (type)) { if (gimplify_ctxp->allow_rhs_cond_expr /* If either branch has side effects or could trap, it can't be evaluated unconditionally. */ && !TREE_SIDE_EFFECTS (then_) && !generic_expr_could_trap_p (then_) && !TREE_SIDE_EFFECTS (else_) && !generic_expr_could_trap_p (else_)) return gimplify_pure_cond_expr (expr_p, pre_p); tmp = create_tmp_var (type, "iftmp"); result = tmp; } /* Otherwise, only create and copy references to the values. */ else { type = build_pointer_type (type); if (!VOID_TYPE_P (TREE_TYPE (then_))) then_ = build_fold_addr_expr_loc (loc, then_); if (!VOID_TYPE_P (TREE_TYPE (else_))) else_ = build_fold_addr_expr_loc (loc, else_); expr = build3 (COND_EXPR, type, TREE_OPERAND (expr, 0), then_, else_); tmp = create_tmp_var (type, "iftmp"); result = build_simple_mem_ref_loc (loc, tmp); } /* Build the new then clause, `tmp = then_;'. But don't build the assignment if the value is void; in C++ it can be if it's a throw. */ if (!VOID_TYPE_P (TREE_TYPE (then_))) TREE_OPERAND (expr, 1) = build2 (INIT_EXPR, type, tmp, then_); /* Similarly, build the new else clause, `tmp = else_;'. */ if (!VOID_TYPE_P (TREE_TYPE (else_))) TREE_OPERAND (expr, 2) = build2 (INIT_EXPR, type, tmp, else_); TREE_TYPE (expr) = void_type_node; recalculate_side_effects (expr); /* Move the COND_EXPR to the prequeue. */ gimplify_stmt (&expr, pre_p); *expr_p = result; return GS_ALL_DONE; } /* Remove any COMPOUND_EXPR so the following cases will be caught. */ STRIP_TYPE_NOPS (TREE_OPERAND (expr, 0)); if (TREE_CODE (TREE_OPERAND (expr, 0)) == COMPOUND_EXPR) gimplify_compound_expr (&TREE_OPERAND (expr, 0), pre_p, true); /* Make sure the condition has BOOLEAN_TYPE. */ TREE_OPERAND (expr, 0) = gimple_boolify (TREE_OPERAND (expr, 0)); /* Break apart && and || conditions. */ if (TREE_CODE (TREE_OPERAND (expr, 0)) == TRUTH_ANDIF_EXPR || TREE_CODE (TREE_OPERAND (expr, 0)) == TRUTH_ORIF_EXPR) { expr = shortcut_cond_expr (expr); if (expr != *expr_p) { *expr_p = expr; /* We can't rely on gimplify_expr to re-gimplify the expanded form properly, as cleanups might cause the target labels to be wrapped in a TRY_FINALLY_EXPR. To prevent that, we need to set up a conditional context. */ gimple_push_condition (); gimplify_stmt (expr_p, &seq); gimple_pop_condition (pre_p); gimple_seq_add_seq (pre_p, seq); return GS_ALL_DONE; } } /* Now do the normal gimplification. */ /* Gimplify condition. */ ret = gimplify_expr (&TREE_OPERAND (expr, 0), pre_p, NULL, is_gimple_condexpr_for_cond, fb_rvalue); if (ret == GS_ERROR) return GS_ERROR; gcc_assert (TREE_OPERAND (expr, 0) != NULL_TREE); gimple_push_condition (); have_then_clause_p = have_else_clause_p = false; label_true = find_goto_label (TREE_OPERAND (expr, 1)); if (label_true && DECL_CONTEXT (GOTO_DESTINATION (label_true)) == current_function_decl /* For -O0 avoid this optimization if the COND_EXPR and GOTO_EXPR have different locations, otherwise we end up with incorrect location information on the branches. */ && (optimize || !EXPR_HAS_LOCATION (expr) || !rexpr_has_location (label_true) || EXPR_LOCATION (expr) == rexpr_location (label_true))) { have_then_clause_p = true; label_true = GOTO_DESTINATION (label_true); } else label_true = create_artificial_label (UNKNOWN_LOCATION); label_false = find_goto_label (TREE_OPERAND (expr, 2)); if (label_false && DECL_CONTEXT (GOTO_DESTINATION (label_false)) == current_function_decl /* For -O0 avoid this optimization if the COND_EXPR and GOTO_EXPR have different locations, otherwise we end up with incorrect location information on the branches. */ && (optimize || !EXPR_HAS_LOCATION (expr) || !rexpr_has_location (label_false) || EXPR_LOCATION (expr) == rexpr_location (label_false))) { have_else_clause_p = true; label_false = GOTO_DESTINATION (label_false); } else label_false = create_artificial_label (UNKNOWN_LOCATION); gimple_cond_get_ops_from_tree (COND_EXPR_COND (expr), &pred_code, &arm1, &arm2); cond_stmt = gimple_build_cond (pred_code, arm1, arm2, label_true, label_false); gimple_set_location (cond_stmt, EXPR_LOCATION (expr)); copy_warning (cond_stmt, COND_EXPR_COND (expr)); gimplify_seq_add_stmt (&seq, cond_stmt); gimple_stmt_iterator gsi = gsi_last (seq); maybe_fold_stmt (&gsi); label_cont = NULL_TREE; if (!have_then_clause_p) { /* For if (...) {} else { code; } put label_true after the else block. */ if (TREE_OPERAND (expr, 1) == NULL_TREE && !have_else_clause_p && TREE_OPERAND (expr, 2) != NULL_TREE) { /* For if (0) {} else { code; } tell -Wimplicit-fallthrough handling that label_cont == label_true can be only reached through fallthrough from { code; }. */ if (integer_zerop (COND_EXPR_COND (expr))) UNUSED_LABEL_P (label_true) = 1; label_cont = label_true; } else { bool then_side_effects = (TREE_OPERAND (expr, 1) && TREE_SIDE_EFFECTS (TREE_OPERAND (expr, 1))); gimplify_seq_add_stmt (&seq, gimple_build_label (label_true)); have_then_clause_p = gimplify_stmt (&TREE_OPERAND (expr, 1), &seq); /* For if (...) { code; } else {} or if (...) { code; } else goto label; or if (...) { code; return; } else { ... } label_cont isn't needed. */ if (!have_else_clause_p && TREE_OPERAND (expr, 2) != NULL_TREE && gimple_seq_may_fallthru (seq)) { gimple *g; label_cont = create_artificial_label (UNKNOWN_LOCATION); /* For if (0) { non-side-effect-code } else { code } tell -Wimplicit-fallthrough handling that label_cont can be only reached through fallthrough from { code }. */ if (integer_zerop (COND_EXPR_COND (expr))) { UNUSED_LABEL_P (label_true) = 1; if (!then_side_effects) UNUSED_LABEL_P (label_cont) = 1; } g = gimple_build_goto (label_cont); /* GIMPLE_COND's are very low level; they have embedded gotos. This particular embedded goto should not be marked with the location of the original COND_EXPR, as it would correspond to the COND_EXPR's condition, not the ELSE or the THEN arms. To avoid marking it with the wrong location, flag it as "no location". */ gimple_set_do_not_emit_location (g); gimplify_seq_add_stmt (&seq, g); } } } if (!have_else_clause_p) { /* For if (1) { code } or if (1) { code } else { non-side-effect-code } tell -Wimplicit-fallthrough handling that label_false can be only reached through fallthrough from { code }. */ if (integer_nonzerop (COND_EXPR_COND (expr)) && (TREE_OPERAND (expr, 2) == NULL_TREE || !TREE_SIDE_EFFECTS (TREE_OPERAND (expr, 2)))) UNUSED_LABEL_P (label_false) = 1; gimplify_seq_add_stmt (&seq, gimple_build_label (label_false)); have_else_clause_p = gimplify_stmt (&TREE_OPERAND (expr, 2), &seq); } if (label_cont) gimplify_seq_add_stmt (&seq, gimple_build_label (label_cont)); gimple_pop_condition (pre_p); gimple_seq_add_seq (pre_p, seq); if (ret == GS_ERROR) ; /* Do nothing. */ else if (have_then_clause_p || have_else_clause_p) ret = GS_ALL_DONE; else { /* Both arms are empty; replace the COND_EXPR with its predicate. */ expr = TREE_OPERAND (expr, 0); gimplify_stmt (&expr, pre_p); } *expr_p = NULL; return ret; } /* Prepare the node pointed to by EXPR_P, an is_gimple_addressable expression, to be marked addressable. We cannot rely on such an expression being directly markable if a temporary has been created by the gimplification. In this case, we create another temporary and initialize it with a copy, which will become a store after we mark it addressable. This can happen if the front-end passed us something that it could not mark addressable yet, like a Fortran pass-by-reference parameter (int) floatvar. */ static void prepare_gimple_addressable (tree *expr_p, gimple_seq *seq_p) { while (handled_component_p (*expr_p)) expr_p = &TREE_OPERAND (*expr_p, 0); if (is_gimple_reg (*expr_p)) { /* Do not allow an SSA name as the temporary. */ tree var = get_initialized_tmp_var (*expr_p, seq_p, NULL, false); DECL_NOT_GIMPLE_REG_P (var) = 1; *expr_p = var; } } /* A subroutine of gimplify_modify_expr. Replace a MODIFY_EXPR with a call to __builtin_memcpy. */ static enum gimplify_status gimplify_modify_expr_to_memcpy (tree *expr_p, tree size, bool want_value, gimple_seq *seq_p) { tree t, to, to_ptr, from, from_ptr; gcall *gs; location_t loc = EXPR_LOCATION (*expr_p); to = TREE_OPERAND (*expr_p, 0); from = TREE_OPERAND (*expr_p, 1); /* Mark the RHS addressable. Beware that it may not be possible to do so directly if a temporary has been created by the gimplification. */ prepare_gimple_addressable (&from, seq_p); mark_addressable (from); from_ptr = build_fold_addr_expr_loc (loc, from); gimplify_arg (&from_ptr, seq_p, loc); mark_addressable (to); to_ptr = build_fold_addr_expr_loc (loc, to); gimplify_arg (&to_ptr, seq_p, loc); t = builtin_decl_implicit (BUILT_IN_MEMCPY); gs = gimple_build_call (t, 3, to_ptr, from_ptr, size); gimple_call_set_alloca_for_var (gs, true); if (want_value) { /* tmp = memcpy() */ t = create_tmp_var (TREE_TYPE (to_ptr)); gimple_call_set_lhs (gs, t); gimplify_seq_add_stmt (seq_p, gs); *expr_p = build_simple_mem_ref (t); return GS_ALL_DONE; } gimplify_seq_add_stmt (seq_p, gs); *expr_p = NULL; return GS_ALL_DONE; } /* A subroutine of gimplify_modify_expr. Replace a MODIFY_EXPR with a call to __builtin_memset. In this case we know that the RHS is a CONSTRUCTOR with an empty element list. */ static enum gimplify_status gimplify_modify_expr_to_memset (tree *expr_p, tree size, bool want_value, gimple_seq *seq_p) { tree t, from, to, to_ptr; gcall *gs; location_t loc = EXPR_LOCATION (*expr_p); /* Assert our assumptions, to abort instead of producing wrong code silently if they are not met. Beware that the RHS CONSTRUCTOR might not be immediately exposed. */ from = TREE_OPERAND (*expr_p, 1); if (TREE_CODE (from) == WITH_SIZE_EXPR) from = TREE_OPERAND (from, 0); gcc_assert (TREE_CODE (from) == CONSTRUCTOR && vec_safe_is_empty (CONSTRUCTOR_ELTS (from))); /* Now proceed. */ to = TREE_OPERAND (*expr_p, 0); to_ptr = build_fold_addr_expr_loc (loc, to); gimplify_arg (&to_ptr, seq_p, loc); t = builtin_decl_implicit (BUILT_IN_MEMSET); gs = gimple_build_call (t, 3, to_ptr, integer_zero_node, size); if (want_value) { /* tmp = memset() */ t = create_tmp_var (TREE_TYPE (to_ptr)); gimple_call_set_lhs (gs, t); gimplify_seq_add_stmt (seq_p, gs); *expr_p = build1 (INDIRECT_REF, TREE_TYPE (to), t); return GS_ALL_DONE; } gimplify_seq_add_stmt (seq_p, gs); *expr_p = NULL; return GS_ALL_DONE; } /* A subroutine of gimplify_init_ctor_preeval. Called via walk_tree, determine, cautiously, if a CONSTRUCTOR overlaps the lhs of an assignment. Return non-null if we detect a potential overlap. */ struct gimplify_init_ctor_preeval_data { /* The base decl of the lhs object. May be NULL, in which case we have to assume the lhs is indirect. */ tree lhs_base_decl; /* The alias set of the lhs object. */ alias_set_type lhs_alias_set; }; static tree gimplify_init_ctor_preeval_1 (tree *tp, int *walk_subtrees, void *xdata) { struct gimplify_init_ctor_preeval_data *data = (struct gimplify_init_ctor_preeval_data *) xdata; tree t = *tp; /* If we find the base object, obviously we have overlap. */ if (data->lhs_base_decl == t) return t; /* If the constructor component is indirect, determine if we have a potential overlap with the lhs. The only bits of information we have to go on at this point are addressability and alias sets. */ if ((INDIRECT_REF_P (t) || TREE_CODE (t) == MEM_REF) && (!data->lhs_base_decl || TREE_ADDRESSABLE (data->lhs_base_decl)) && alias_sets_conflict_p (data->lhs_alias_set, get_alias_set (t))) return t; /* If the constructor component is a call, determine if it can hide a potential overlap with the lhs through an INDIRECT_REF like above. ??? Ugh - this is completely broken. In fact this whole analysis doesn't look conservative. */ if (TREE_CODE (t) == CALL_EXPR) { tree type, fntype = TREE_TYPE (TREE_TYPE (CALL_EXPR_FN (t))); for (type = TYPE_ARG_TYPES (fntype); type; type = TREE_CHAIN (type)) if (POINTER_TYPE_P (TREE_VALUE (type)) && (!data->lhs_base_decl || TREE_ADDRESSABLE (data->lhs_base_decl)) && alias_sets_conflict_p (data->lhs_alias_set, get_alias_set (TREE_TYPE (TREE_VALUE (type))))) return t; } if (IS_TYPE_OR_DECL_P (t)) *walk_subtrees = 0; return NULL; } /* A subroutine of gimplify_init_constructor. Pre-evaluate EXPR, force values that overlap with the lhs (as described by *DATA) into temporaries. */ static void gimplify_init_ctor_preeval (tree *expr_p, gimple_seq *pre_p, gimple_seq *post_p, struct gimplify_init_ctor_preeval_data *data) { enum gimplify_status one; /* If the value is constant, then there's nothing to pre-evaluate. */ if (TREE_CONSTANT (*expr_p)) { /* Ensure it does not have side effects, it might contain a reference to the object we're initializing. */ gcc_assert (!TREE_SIDE_EFFECTS (*expr_p)); return; } /* If the type has non-trivial constructors, we can't pre-evaluate. */ if (TREE_ADDRESSABLE (TREE_TYPE (*expr_p))) return; /* Recurse for nested constructors. */ if (TREE_CODE (*expr_p) == CONSTRUCTOR) { unsigned HOST_WIDE_INT ix; constructor_elt *ce; vec *v = CONSTRUCTOR_ELTS (*expr_p); FOR_EACH_VEC_SAFE_ELT (v, ix, ce) gimplify_init_ctor_preeval (&ce->value, pre_p, post_p, data); return; } /* If this is a variable sized type, we must remember the size. */ maybe_with_size_expr (expr_p); /* Gimplify the constructor element to something appropriate for the rhs of a MODIFY_EXPR. Given that we know the LHS is an aggregate, we know the gimplifier will consider this a store to memory. Doing this gimplification now means that we won't have to deal with complicated language-specific trees, nor trees like SAVE_EXPR that can induce exponential search behavior. */ one = gimplify_expr (expr_p, pre_p, post_p, is_gimple_mem_rhs, fb_rvalue); if (one == GS_ERROR) { *expr_p = NULL; return; } /* If we gimplified to a bare decl, we can be sure that it doesn't overlap with the lhs, since "a = { .x=a }" doesn't make sense. This will always be true for all scalars, since is_gimple_mem_rhs insists on a temporary variable for them. */ if (DECL_P (*expr_p)) return; /* If this is of variable size, we have no choice but to assume it doesn't overlap since we can't make a temporary for it. */ if (TREE_CODE (TYPE_SIZE (TREE_TYPE (*expr_p))) != INTEGER_CST) return; /* Otherwise, we must search for overlap ... */ if (!walk_tree (expr_p, gimplify_init_ctor_preeval_1, data, NULL)) return; /* ... and if found, force the value into a temporary. */ *expr_p = get_formal_tmp_var (*expr_p, pre_p); } /* A subroutine of gimplify_init_ctor_eval. Create a loop for a RANGE_EXPR in a CONSTRUCTOR for an array. var = lower; loop_entry: object[var] = value; if (var == upper) goto loop_exit; var = var + 1; goto loop_entry; loop_exit: We increment var _after_ the loop exit check because we might otherwise fail if upper == TYPE_MAX_VALUE (type for upper). Note that we never have to deal with SAVE_EXPRs here, because this has already been taken care of for us, in gimplify_init_ctor_preeval(). */ static void gimplify_init_ctor_eval (tree, vec *, gimple_seq *, bool); static void gimplify_init_ctor_eval_range (tree object, tree lower, tree upper, tree value, tree array_elt_type, gimple_seq *pre_p, bool cleared) { tree loop_entry_label, loop_exit_label, fall_thru_label; tree var, var_type, cref, tmp; loop_entry_label = create_artificial_label (UNKNOWN_LOCATION); loop_exit_label = create_artificial_label (UNKNOWN_LOCATION); fall_thru_label = create_artificial_label (UNKNOWN_LOCATION); /* Create and initialize the index variable. */ var_type = TREE_TYPE (upper); var = create_tmp_var (var_type); gimplify_seq_add_stmt (pre_p, gimple_build_assign (var, lower)); /* Add the loop entry label. */ gimplify_seq_add_stmt (pre_p, gimple_build_label (loop_entry_label)); /* Build the reference. */ cref = build4 (ARRAY_REF, array_elt_type, unshare_expr (object), var, NULL_TREE, NULL_TREE); /* If we are a constructor, just call gimplify_init_ctor_eval to do the store. Otherwise just assign value to the reference. */ if (TREE_CODE (value) == CONSTRUCTOR) /* NB we might have to call ourself recursively through gimplify_init_ctor_eval if the value is a constructor. */ gimplify_init_ctor_eval (cref, CONSTRUCTOR_ELTS (value), pre_p, cleared); else { if (gimplify_expr (&value, pre_p, NULL, is_gimple_val, fb_rvalue) != GS_ERROR) gimplify_seq_add_stmt (pre_p, gimple_build_assign (cref, value)); } /* We exit the loop when the index var is equal to the upper bound. */ gimplify_seq_add_stmt (pre_p, gimple_build_cond (EQ_EXPR, var, upper, loop_exit_label, fall_thru_label)); gimplify_seq_add_stmt (pre_p, gimple_build_label (fall_thru_label)); /* Otherwise, increment the index var... */ tmp = build2 (PLUS_EXPR, var_type, var, fold_convert (var_type, integer_one_node)); gimplify_seq_add_stmt (pre_p, gimple_build_assign (var, tmp)); /* ...and jump back to the loop entry. */ gimplify_seq_add_stmt (pre_p, gimple_build_goto (loop_entry_label)); /* Add the loop exit label. */ gimplify_seq_add_stmt (pre_p, gimple_build_label (loop_exit_label)); } /* A subroutine of gimplify_init_constructor. Generate individual MODIFY_EXPRs for a CONSTRUCTOR. OBJECT is the LHS against which the assignments should happen. ELTS is the CONSTRUCTOR_ELTS of the CONSTRUCTOR. CLEARED is true if the entire LHS object has been zeroed first. */ static void gimplify_init_ctor_eval (tree object, vec *elts, gimple_seq *pre_p, bool cleared) { tree array_elt_type = NULL; unsigned HOST_WIDE_INT ix; tree purpose, value; if (TREE_CODE (TREE_TYPE (object)) == ARRAY_TYPE) array_elt_type = TYPE_MAIN_VARIANT (TREE_TYPE (TREE_TYPE (object))); FOR_EACH_CONSTRUCTOR_ELT (elts, ix, purpose, value) { tree cref; /* NULL values are created above for gimplification errors. */ if (value == NULL) continue; if (cleared && initializer_zerop (value)) continue; /* ??? Here's to hoping the front end fills in all of the indices, so we don't have to figure out what's missing ourselves. */ gcc_assert (purpose); /* Skip zero-sized fields, unless value has side-effects. This can happen with calls to functions returning a empty type, which we shouldn't discard. As a number of downstream passes don't expect sets of empty type fields, we rely on the gimplification of the MODIFY_EXPR we make below to drop the assignment statement. */ if (!TREE_SIDE_EFFECTS (value) && TREE_CODE (purpose) == FIELD_DECL && is_empty_type (TREE_TYPE (purpose))) continue; /* If we have a RANGE_EXPR, we have to build a loop to assign the whole range. */ if (TREE_CODE (purpose) == RANGE_EXPR) { tree lower = TREE_OPERAND (purpose, 0); tree upper = TREE_OPERAND (purpose, 1); /* If the lower bound is equal to upper, just treat it as if upper was the index. */ if (simple_cst_equal (lower, upper)) purpose = upper; else { gimplify_init_ctor_eval_range (object, lower, upper, value, array_elt_type, pre_p, cleared); continue; } } if (array_elt_type) { /* Do not use bitsizetype for ARRAY_REF indices. */ if (TYPE_DOMAIN (TREE_TYPE (object))) purpose = fold_convert (TREE_TYPE (TYPE_DOMAIN (TREE_TYPE (object))), purpose); cref = build4 (ARRAY_REF, array_elt_type, unshare_expr (object), purpose, NULL_TREE, NULL_TREE); } else { gcc_assert (TREE_CODE (purpose) == FIELD_DECL); cref = build3 (COMPONENT_REF, TREE_TYPE (purpose), unshare_expr (object), purpose, NULL_TREE); } if (TREE_CODE (value) == CONSTRUCTOR && TREE_CODE (TREE_TYPE (value)) != VECTOR_TYPE) gimplify_init_ctor_eval (cref, CONSTRUCTOR_ELTS (value), pre_p, cleared); else { tree init = build2 (INIT_EXPR, TREE_TYPE (cref), cref, value); gimplify_and_add (init, pre_p); ggc_free (init); } } } /* Return the appropriate RHS predicate for this LHS. */ gimple_predicate rhs_predicate_for (tree lhs) { if (is_gimple_reg (lhs)) return is_gimple_reg_rhs_or_call; else return is_gimple_mem_rhs_or_call; } /* Return the initial guess for an appropriate RHS predicate for this LHS, before the LHS has been gimplified. */ static gimple_predicate initial_rhs_predicate_for (tree lhs) { if (is_gimple_reg_type (TREE_TYPE (lhs))) return is_gimple_reg_rhs_or_call; else return is_gimple_mem_rhs_or_call; } /* Gimplify a C99 compound literal expression. This just means adding the DECL_EXPR before the current statement and using its anonymous decl instead. */ static enum gimplify_status gimplify_compound_literal_expr (tree *expr_p, gimple_seq *pre_p, bool (*gimple_test_f) (tree), fallback_t fallback) { tree decl_s = COMPOUND_LITERAL_EXPR_DECL_EXPR (*expr_p); tree decl = DECL_EXPR_DECL (decl_s); tree init = DECL_INITIAL (decl); /* Mark the decl as addressable if the compound literal expression is addressable now, otherwise it is marked too late after we gimplify the initialization expression. */ if (TREE_ADDRESSABLE (*expr_p)) TREE_ADDRESSABLE (decl) = 1; /* Otherwise, if we don't need an lvalue and have a literal directly substitute it. Check if it matches the gimple predicate, as otherwise we'd generate a new temporary, and we can as well just use the decl we already have. */ else if (!TREE_ADDRESSABLE (decl) && !TREE_THIS_VOLATILE (decl) && init && (fallback & fb_lvalue) == 0 && gimple_test_f (init)) { *expr_p = init; return GS_OK; } /* If the decl is not addressable, then it is being used in some expression or on the right hand side of a statement, and it can be put into a readonly data section. */ if (!TREE_ADDRESSABLE (decl) && (fallback & fb_lvalue) == 0) TREE_READONLY (decl) = 1; /* This decl isn't mentioned in the enclosing block, so add it to the list of temps. FIXME it seems a bit of a kludge to say that anonymous artificial vars aren't pushed, but everything else is. */ if (DECL_NAME (decl) == NULL_TREE && !DECL_SEEN_IN_BIND_EXPR_P (decl)) gimple_add_tmp_var (decl); gimplify_and_add (decl_s, pre_p); *expr_p = decl; return GS_OK; } /* Optimize embedded COMPOUND_LITERAL_EXPRs within a CONSTRUCTOR, return a new CONSTRUCTOR if something changed. */ static tree optimize_compound_literals_in_ctor (tree orig_ctor) { tree ctor = orig_ctor; vec *elts = CONSTRUCTOR_ELTS (ctor); unsigned int idx, num = vec_safe_length (elts); for (idx = 0; idx < num; idx++) { tree value = (*elts)[idx].value; tree newval = value; if (TREE_CODE (value) == CONSTRUCTOR) newval = optimize_compound_literals_in_ctor (value); else if (TREE_CODE (value) == COMPOUND_LITERAL_EXPR) { tree decl_s = COMPOUND_LITERAL_EXPR_DECL_EXPR (value); tree decl = DECL_EXPR_DECL (decl_s); tree init = DECL_INITIAL (decl); if (!TREE_ADDRESSABLE (value) && !TREE_ADDRESSABLE (decl) && init && TREE_CODE (init) == CONSTRUCTOR) newval = optimize_compound_literals_in_ctor (init); } if (newval == value) continue; if (ctor == orig_ctor) { ctor = copy_node (orig_ctor); CONSTRUCTOR_ELTS (ctor) = vec_safe_copy (elts); elts = CONSTRUCTOR_ELTS (ctor); } (*elts)[idx].value = newval; } return ctor; } /* A subroutine of gimplify_modify_expr. Break out elements of a CONSTRUCTOR used as an initializer into separate MODIFY_EXPRs. Note that we still need to clear any elements that don't have explicit initializers, so if not all elements are initialized we keep the original MODIFY_EXPR, we just remove all of the constructor elements. If NOTIFY_TEMP_CREATION is true, do not gimplify, just return GS_ERROR if we would have to create a temporary when gimplifying this constructor. Otherwise, return GS_OK. If NOTIFY_TEMP_CREATION is false, just do the gimplification. */ static enum gimplify_status gimplify_init_constructor (tree *expr_p, gimple_seq *pre_p, gimple_seq *post_p, bool want_value, bool notify_temp_creation) { tree object, ctor, type; enum gimplify_status ret; vec *elts; bool cleared = false; bool is_empty_ctor = false; bool is_init_expr = (TREE_CODE (*expr_p) == INIT_EXPR); gcc_assert (TREE_CODE (TREE_OPERAND (*expr_p, 1)) == CONSTRUCTOR); if (!notify_temp_creation) { ret = gimplify_expr (&TREE_OPERAND (*expr_p, 0), pre_p, post_p, is_gimple_lvalue, fb_lvalue); if (ret == GS_ERROR) return ret; } object = TREE_OPERAND (*expr_p, 0); ctor = TREE_OPERAND (*expr_p, 1) = optimize_compound_literals_in_ctor (TREE_OPERAND (*expr_p, 1)); type = TREE_TYPE (ctor); elts = CONSTRUCTOR_ELTS (ctor); ret = GS_ALL_DONE; switch (TREE_CODE (type)) { case RECORD_TYPE: case UNION_TYPE: case QUAL_UNION_TYPE: case ARRAY_TYPE: { /* Use readonly data for initializers of this or smaller size regardless of the num_nonzero_elements / num_unique_nonzero_elements ratio. */ const HOST_WIDE_INT min_unique_size = 64; /* If num_nonzero_elements / num_unique_nonzero_elements ratio is smaller than this, use readonly data. */ const int unique_nonzero_ratio = 8; /* True if a single access of the object must be ensured. This is the case if the target is volatile, the type is non-addressable and more than one field need to be assigned. */ const bool ensure_single_access = TREE_THIS_VOLATILE (object) && !TREE_ADDRESSABLE (type) && vec_safe_length (elts) > 1; struct gimplify_init_ctor_preeval_data preeval_data; HOST_WIDE_INT num_ctor_elements, num_nonzero_elements; HOST_WIDE_INT num_unique_nonzero_elements; bool complete_p, valid_const_initializer; /* Aggregate types must lower constructors to initialization of individual elements. The exception is that a CONSTRUCTOR node with no elements indicates zero-initialization of the whole. */ if (vec_safe_is_empty (elts)) { if (notify_temp_creation) return GS_OK; /* The var will be initialized and so appear on lhs of assignment, it can't be TREE_READONLY anymore. */ if (VAR_P (object)) TREE_READONLY (object) = 0; is_empty_ctor = true; break; } /* Fetch information about the constructor to direct later processing. We might want to make static versions of it in various cases, and can only do so if it known to be a valid constant initializer. */ valid_const_initializer = categorize_ctor_elements (ctor, &num_nonzero_elements, &num_unique_nonzero_elements, &num_ctor_elements, &complete_p); /* If a const aggregate variable is being initialized, then it should never be a lose to promote the variable to be static. */ if (valid_const_initializer && num_nonzero_elements > 1 && TREE_READONLY (object) && VAR_P (object) && !DECL_REGISTER (object) && (flag_merge_constants >= 2 || !TREE_ADDRESSABLE (object)) /* For ctors that have many repeated nonzero elements represented through RANGE_EXPRs, prefer initializing those through runtime loops over copies of large amounts of data from readonly data section. */ && (num_unique_nonzero_elements > num_nonzero_elements / unique_nonzero_ratio || ((unsigned HOST_WIDE_INT) int_size_in_bytes (type) <= (unsigned HOST_WIDE_INT) min_unique_size))) { if (notify_temp_creation) return GS_ERROR; DECL_INITIAL (object) = ctor; TREE_STATIC (object) = 1; if (!DECL_NAME (object)) DECL_NAME (object) = create_tmp_var_name ("C"); walk_tree (&DECL_INITIAL (object), force_labels_r, NULL, NULL); /* ??? C++ doesn't automatically append a . to the assembler name, and even when it does, it looks at FE private data structures to figure out what that number should be, which are not set for this variable. I suppose this is important for local statics for inline functions, which aren't "local" in the object file sense. So in order to get a unique TU-local symbol, we must invoke the lhd version now. */ lhd_set_decl_assembler_name (object); *expr_p = NULL_TREE; break; } /* The var will be initialized and so appear on lhs of assignment, it can't be TREE_READONLY anymore. */ if (VAR_P (object) && !notify_temp_creation) TREE_READONLY (object) = 0; /* If there are "lots" of initialized elements, even discounting those that are not address constants (and thus *must* be computed at runtime), then partition the constructor into constant and non-constant parts. Block copy the constant parts in, then generate code for the non-constant parts. */ /* TODO. There's code in cp/typeck.cc to do this. */ if (int_size_in_bytes (TREE_TYPE (ctor)) < 0) /* store_constructor will ignore the clearing of variable-sized objects. Initializers for such objects must explicitly set every field that needs to be set. */ cleared = false; else if (!complete_p) /* If the constructor isn't complete, clear the whole object beforehand, unless CONSTRUCTOR_NO_CLEARING is set on it. ??? This ought not to be needed. For any element not present in the initializer, we should simply set them to zero. Except we'd need to *find* the elements that are not present, and that requires trickery to avoid quadratic compile-time behavior in large cases or excessive memory use in small cases. */ cleared = !CONSTRUCTOR_NO_CLEARING (ctor); else if (num_ctor_elements - num_nonzero_elements > CLEAR_RATIO (optimize_function_for_speed_p (cfun)) && num_nonzero_elements < num_ctor_elements / 4) /* If there are "lots" of zeros, it's more efficient to clear the memory and then set the nonzero elements. */ cleared = true; else if (ensure_single_access && num_nonzero_elements == 0) /* If a single access to the target must be ensured and all elements are zero, then it's optimal to clear whatever their number. */ cleared = true; else cleared = false; /* If there are "lots" of initialized elements, and all of them are valid address constants, then the entire initializer can be dropped to memory, and then memcpy'd out. Don't do this for sparse arrays, though, as it's more efficient to follow the standard CONSTRUCTOR behavior of memset followed by individual element initialization. Also don't do this for small all-zero initializers (which aren't big enough to merit clearing), and don't try to make bitwise copies of TREE_ADDRESSABLE types. */ if (valid_const_initializer && complete_p && !(cleared || num_nonzero_elements == 0) && !TREE_ADDRESSABLE (type)) { HOST_WIDE_INT size = int_size_in_bytes (type); unsigned int align; /* ??? We can still get unbounded array types, at least from the C++ front end. This seems wrong, but attempt to work around it for now. */ if (size < 0) { size = int_size_in_bytes (TREE_TYPE (object)); if (size >= 0) TREE_TYPE (ctor) = type = TREE_TYPE (object); } /* Find the maximum alignment we can assume for the object. */ /* ??? Make use of DECL_OFFSET_ALIGN. */ if (DECL_P (object)) align = DECL_ALIGN (object); else align = TYPE_ALIGN (type); /* Do a block move either if the size is so small as to make each individual move a sub-unit move on average, or if it is so large as to make individual moves inefficient. */ if (size > 0 && num_nonzero_elements > 1 /* For ctors that have many repeated nonzero elements represented through RANGE_EXPRs, prefer initializing those through runtime loops over copies of large amounts of data from readonly data section. */ && (num_unique_nonzero_elements > num_nonzero_elements / unique_nonzero_ratio || size <= min_unique_size) && (size < num_nonzero_elements || !can_move_by_pieces (size, align))) { if (notify_temp_creation) return GS_ERROR; walk_tree (&ctor, force_labels_r, NULL, NULL); ctor = tree_output_constant_def (ctor); if (!useless_type_conversion_p (type, TREE_TYPE (ctor))) ctor = build1 (VIEW_CONVERT_EXPR, type, ctor); TREE_OPERAND (*expr_p, 1) = ctor; /* This is no longer an assignment of a CONSTRUCTOR, but we still may have processing to do on the LHS. So pretend we didn't do anything here to let that happen. */ return GS_UNHANDLED; } } /* If a single access to the target must be ensured and there are nonzero elements or the zero elements are not assigned en masse, initialize the target from a temporary. */ if (ensure_single_access && (num_nonzero_elements > 0 || !cleared)) { if (notify_temp_creation) return GS_ERROR; tree temp = create_tmp_var (TYPE_MAIN_VARIANT (type)); TREE_OPERAND (*expr_p, 0) = temp; *expr_p = build2 (COMPOUND_EXPR, TREE_TYPE (*expr_p), *expr_p, build2 (MODIFY_EXPR, void_type_node, object, temp)); return GS_OK; } if (notify_temp_creation) return GS_OK; /* If there are nonzero elements and if needed, pre-evaluate to capture elements overlapping with the lhs into temporaries. We must do this before clearing to fetch the values before they are zeroed-out. */ if (num_nonzero_elements > 0 && TREE_CODE (*expr_p) != INIT_EXPR) { preeval_data.lhs_base_decl = get_base_address (object); if (!DECL_P (preeval_data.lhs_base_decl)) preeval_data.lhs_base_decl = NULL; preeval_data.lhs_alias_set = get_alias_set (object); gimplify_init_ctor_preeval (&TREE_OPERAND (*expr_p, 1), pre_p, post_p, &preeval_data); } bool ctor_has_side_effects_p = TREE_SIDE_EFFECTS (TREE_OPERAND (*expr_p, 1)); if (cleared) { /* Zap the CONSTRUCTOR element list, which simplifies this case. Note that we still have to gimplify, in order to handle the case of variable sized types. Avoid shared tree structures. */ CONSTRUCTOR_ELTS (ctor) = NULL; TREE_SIDE_EFFECTS (ctor) = 0; object = unshare_expr (object); gimplify_stmt (expr_p, pre_p); } /* If we have not block cleared the object, or if there are nonzero elements in the constructor, or if the constructor has side effects, add assignments to the individual scalar fields of the object. */ if (!cleared || num_nonzero_elements > 0 || ctor_has_side_effects_p) gimplify_init_ctor_eval (object, elts, pre_p, cleared); *expr_p = NULL_TREE; } break; case COMPLEX_TYPE: { tree r, i; if (notify_temp_creation) return GS_OK; /* Extract the real and imaginary parts out of the ctor. */ gcc_assert (elts->length () == 2); r = (*elts)[0].value; i = (*elts)[1].value; if (r == NULL || i == NULL) { tree zero = build_zero_cst (TREE_TYPE (type)); if (r == NULL) r = zero; if (i == NULL) i = zero; } /* Complex types have either COMPLEX_CST or COMPLEX_EXPR to represent creation of a complex value. */ if (TREE_CONSTANT (r) && TREE_CONSTANT (i)) { ctor = build_complex (type, r, i); TREE_OPERAND (*expr_p, 1) = ctor; } else { ctor = build2 (COMPLEX_EXPR, type, r, i); TREE_OPERAND (*expr_p, 1) = ctor; ret = gimplify_expr (&TREE_OPERAND (*expr_p, 1), pre_p, post_p, rhs_predicate_for (TREE_OPERAND (*expr_p, 0)), fb_rvalue); } } break; case VECTOR_TYPE: { unsigned HOST_WIDE_INT ix; constructor_elt *ce; if (notify_temp_creation) return GS_OK; /* Go ahead and simplify constant constructors to VECTOR_CST. */ if (TREE_CONSTANT (ctor)) { bool constant_p = true; tree value; /* Even when ctor is constant, it might contain non-*_CST elements, such as addresses or trapping values like 1.0/0.0 - 1.0/0.0. Such expressions don't belong in VECTOR_CST nodes. */ FOR_EACH_CONSTRUCTOR_VALUE (elts, ix, value) if (!CONSTANT_CLASS_P (value)) { constant_p = false; break; } if (constant_p) { TREE_OPERAND (*expr_p, 1) = build_vector_from_ctor (type, elts); break; } TREE_CONSTANT (ctor) = 0; } /* Vector types use CONSTRUCTOR all the way through gimple compilation as a general initializer. */ FOR_EACH_VEC_SAFE_ELT (elts, ix, ce) { enum gimplify_status tret; tret = gimplify_expr (&ce->value, pre_p, post_p, is_gimple_val, fb_rvalue); if (tret == GS_ERROR) ret = GS_ERROR; else if (TREE_STATIC (ctor) && !initializer_constant_valid_p (ce->value, TREE_TYPE (ce->value))) TREE_STATIC (ctor) = 0; } recompute_constructor_flags (ctor); if (!is_gimple_reg (TREE_OPERAND (*expr_p, 0))) TREE_OPERAND (*expr_p, 1) = get_formal_tmp_var (ctor, pre_p); } break; default: /* So how did we get a CONSTRUCTOR for a scalar type? */ gcc_unreachable (); } if (ret == GS_ERROR) return GS_ERROR; /* If we have gimplified both sides of the initializer but have not emitted an assignment, do so now. */ if (*expr_p) { tree lhs = TREE_OPERAND (*expr_p, 0); tree rhs = TREE_OPERAND (*expr_p, 1); if (want_value && object == lhs) lhs = unshare_expr (lhs); gassign *init = gimple_build_assign (lhs, rhs); gimplify_seq_add_stmt (pre_p, init); } if (want_value) { *expr_p = object; ret = GS_OK; } else { *expr_p = NULL; ret = GS_ALL_DONE; } /* If the user requests to initialize automatic variables, we should initialize paddings inside the variable. Add a call to __builtin_clear_pading (&object, 0, for_auto_init = true) to initialize paddings of object always to zero regardless of INIT_TYPE. Note, we will not insert this call if the aggregate variable has be completely cleared already or it's initialized with an empty constructor. We cannot insert this call if the variable is a gimple register since __builtin_clear_padding will take the address of the variable. As a result, if a long double/_Complex long double variable will be spilled into stack later, its padding cannot be cleared with __builtin_clear_padding. We should clear its padding when it is spilled into memory. */ if (is_init_expr && !is_gimple_reg (object) && clear_padding_type_may_have_padding_p (type) && ((AGGREGATE_TYPE_P (type) && !cleared && !is_empty_ctor) || !AGGREGATE_TYPE_P (type)) && is_var_need_auto_init (object)) gimple_add_padding_init_for_auto_var (object, false, pre_p); return ret; } /* Given a pointer value OP0, return a simplified version of an indirection through OP0, or NULL_TREE if no simplification is possible. This may only be applied to a rhs of an expression. Note that the resulting type may be different from the type pointed to in the sense that it is still compatible from the langhooks point of view. */ static tree gimple_fold_indirect_ref_rhs (tree t) { return gimple_fold_indirect_ref (t); } /* Subroutine of gimplify_modify_expr to do simplifications of MODIFY_EXPRs based on the code of the RHS. We loop for as long as something changes. */ static enum gimplify_status gimplify_modify_expr_rhs (tree *expr_p, tree *from_p, tree *to_p, gimple_seq *pre_p, gimple_seq *post_p, bool want_value) { enum gimplify_status ret = GS_UNHANDLED; bool changed; do { changed = false; switch (TREE_CODE (*from_p)) { case VAR_DECL: /* If we're assigning from a read-only variable initialized with a constructor and not volatile, do the direct assignment from the constructor, but only if the target is not volatile either since this latter assignment might end up being done on a per field basis. However, if the target is volatile and the type is aggregate and non-addressable, gimplify_init_constructor knows that it needs to ensure a single access to the target and it will return GS_OK only in this case. */ if (TREE_READONLY (*from_p) && DECL_INITIAL (*from_p) && TREE_CODE (DECL_INITIAL (*from_p)) == CONSTRUCTOR && !TREE_THIS_VOLATILE (*from_p) && (!TREE_THIS_VOLATILE (*to_p) || (AGGREGATE_TYPE_P (TREE_TYPE (*to_p)) && !TREE_ADDRESSABLE (TREE_TYPE (*to_p))))) { tree old_from = *from_p; enum gimplify_status subret; /* Move the constructor into the RHS. */ *from_p = unshare_expr (DECL_INITIAL (*from_p)); /* Let's see if gimplify_init_constructor will need to put it in memory. */ subret = gimplify_init_constructor (expr_p, NULL, NULL, false, true); if (subret == GS_ERROR) { /* If so, revert the change. */ *from_p = old_from; } else { ret = GS_OK; changed = true; } } break; case INDIRECT_REF: { /* If we have code like *(const A*)(A*)&x where the type of "x" is a (possibly cv-qualified variant of "A"), treat the entire expression as identical to "x". This kind of code arises in C++ when an object is bound to a const reference, and if "x" is a TARGET_EXPR we want to take advantage of the optimization below. */ bool volatile_p = TREE_THIS_VOLATILE (*from_p); tree t = gimple_fold_indirect_ref_rhs (TREE_OPERAND (*from_p, 0)); if (t) { if (TREE_THIS_VOLATILE (t) != volatile_p) { if (DECL_P (t)) t = build_simple_mem_ref_loc (EXPR_LOCATION (*from_p), build_fold_addr_expr (t)); if (REFERENCE_CLASS_P (t)) TREE_THIS_VOLATILE (t) = volatile_p; } *from_p = t; ret = GS_OK; changed = true; } break; } case TARGET_EXPR: { /* If we are initializing something from a TARGET_EXPR, strip the TARGET_EXPR and initialize it directly, if possible. This can't be done if the initializer is void, since that implies that the temporary is set in some non-trivial way. ??? What about code that pulls out the temp and uses it elsewhere? I think that such code never uses the TARGET_EXPR as an initializer. If I'm wrong, we'll die because the temp won't have any RTL. In that case, I guess we'll need to replace references somehow. */ tree init = TARGET_EXPR_INITIAL (*from_p); if (init && (TREE_CODE (*expr_p) != MODIFY_EXPR || !TARGET_EXPR_NO_ELIDE (*from_p)) && !VOID_TYPE_P (TREE_TYPE (init))) { *from_p = init; ret = GS_OK; changed = true; } } break; case COMPOUND_EXPR: /* Remove any COMPOUND_EXPR in the RHS so the following cases will be caught. */ gimplify_compound_expr (from_p, pre_p, true); ret = GS_OK; changed = true; break; case CONSTRUCTOR: /* If we already made some changes, let the front end have a crack at this before we break it down. */ if (ret != GS_UNHANDLED) break; /* If we're initializing from a CONSTRUCTOR, break this into individual MODIFY_EXPRs. */ ret = gimplify_init_constructor (expr_p, pre_p, post_p, want_value, false); return ret; case COND_EXPR: /* If we're assigning to a non-register type, push the assignment down into the branches. This is mandatory for ADDRESSABLE types, since we cannot generate temporaries for such, but it saves a copy in other cases as well. */ if (!is_gimple_reg_type (TREE_TYPE (*from_p))) { /* This code should mirror the code in gimplify_cond_expr. */ enum tree_code code = TREE_CODE (*expr_p); tree cond = *from_p; tree result = *to_p; ret = gimplify_expr (&result, pre_p, post_p, is_gimple_lvalue, fb_lvalue); if (ret != GS_ERROR) ret = GS_OK; /* If we are going to write RESULT more than once, clear TREE_READONLY flag, otherwise we might incorrectly promote the variable to static const and initialize it at compile time in one of the branches. */ if (VAR_P (result) && TREE_TYPE (TREE_OPERAND (cond, 1)) != void_type_node && TREE_TYPE (TREE_OPERAND (cond, 2)) != void_type_node) TREE_READONLY (result) = 0; if (TREE_TYPE (TREE_OPERAND (cond, 1)) != void_type_node) TREE_OPERAND (cond, 1) = build2 (code, void_type_node, result, TREE_OPERAND (cond, 1)); if (TREE_TYPE (TREE_OPERAND (cond, 2)) != void_type_node) TREE_OPERAND (cond, 2) = build2 (code, void_type_node, unshare_expr (result), TREE_OPERAND (cond, 2)); TREE_TYPE (cond) = void_type_node; recalculate_side_effects (cond); if (want_value) { gimplify_and_add (cond, pre_p); *expr_p = unshare_expr (result); } else *expr_p = cond; return ret; } break; case CALL_EXPR: /* For calls that return in memory, give *to_p as the CALL_EXPR's return slot so that we don't generate a temporary. */ if (!CALL_EXPR_RETURN_SLOT_OPT (*from_p) && aggregate_value_p (*from_p, *from_p)) { bool use_target; if (!(rhs_predicate_for (*to_p))(*from_p)) /* If we need a temporary, *to_p isn't accurate. */ use_target = false; /* It's OK to use the return slot directly unless it's an NRV. */ else if (TREE_CODE (*to_p) == RESULT_DECL && DECL_NAME (*to_p) == NULL_TREE && needs_to_live_in_memory (*to_p)) use_target = true; else if (is_gimple_reg_type (TREE_TYPE (*to_p)) || (DECL_P (*to_p) && DECL_REGISTER (*to_p))) /* Don't force regs into memory. */ use_target = false; else if (TREE_CODE (*expr_p) == INIT_EXPR) /* It's OK to use the target directly if it's being initialized. */ use_target = true; else if (TREE_CODE (TYPE_SIZE_UNIT (TREE_TYPE (*to_p))) != INTEGER_CST) /* Always use the target and thus RSO for variable-sized types. GIMPLE cannot deal with a variable-sized assignment embedded in a call statement. */ use_target = true; else if (TREE_CODE (*to_p) != SSA_NAME && (!is_gimple_variable (*to_p) || needs_to_live_in_memory (*to_p))) /* Don't use the original target if it's already addressable; if its address escapes, and the called function uses the NRV optimization, a conforming program could see *to_p change before the called function returns; see c++/19317. When optimizing, the return_slot pass marks more functions as safe after we have escape info. */ use_target = false; else use_target = true; if (use_target) { CALL_EXPR_RETURN_SLOT_OPT (*from_p) = 1; mark_addressable (*to_p); } } break; case WITH_SIZE_EXPR: /* Likewise for calls that return an aggregate of non-constant size, since we would not be able to generate a temporary at all. */ if (TREE_CODE (TREE_OPERAND (*from_p, 0)) == CALL_EXPR) { *from_p = TREE_OPERAND (*from_p, 0); /* We don't change ret in this case because the WITH_SIZE_EXPR might have been added in gimplify_modify_expr, so returning GS_OK would lead to an infinite loop. */ changed = true; } break; /* If we're initializing from a container, push the initialization inside it. */ case CLEANUP_POINT_EXPR: case BIND_EXPR: case STATEMENT_LIST: { tree wrap = *from_p; tree t; ret = gimplify_expr (to_p, pre_p, post_p, is_gimple_min_lval, fb_lvalue); if (ret != GS_ERROR) ret = GS_OK; t = voidify_wrapper_expr (wrap, *expr_p); gcc_assert (t == *expr_p); if (want_value) { gimplify_and_add (wrap, pre_p); *expr_p = unshare_expr (*to_p); } else *expr_p = wrap; return GS_OK; } case NOP_EXPR: /* Pull out compound literal expressions from a NOP_EXPR. Those are created in the C FE to drop qualifiers during lvalue conversion. */ if ((TREE_CODE (TREE_OPERAND (*from_p, 0)) == COMPOUND_LITERAL_EXPR) && tree_ssa_useless_type_conversion (*from_p)) { *from_p = TREE_OPERAND (*from_p, 0); ret = GS_OK; changed = true; } break; case COMPOUND_LITERAL_EXPR: { tree complit = TREE_OPERAND (*expr_p, 1); tree decl_s = COMPOUND_LITERAL_EXPR_DECL_EXPR (complit); tree decl = DECL_EXPR_DECL (decl_s); tree init = DECL_INITIAL (decl); /* struct T x = (struct T) { 0, 1, 2 } can be optimized into struct T x = { 0, 1, 2 } if the address of the compound literal has never been taken. */ if (!TREE_ADDRESSABLE (complit) && !TREE_ADDRESSABLE (decl) && init) { *expr_p = copy_node (*expr_p); TREE_OPERAND (*expr_p, 1) = init; return GS_OK; } } default: break; } } while (changed); return ret; } /* Return true if T looks like a valid GIMPLE statement. */ static bool is_gimple_stmt (tree t) { const enum tree_code code = TREE_CODE (t); switch (code) { case NOP_EXPR: /* The only valid NOP_EXPR is the empty statement. */ return IS_EMPTY_STMT (t); case BIND_EXPR: case COND_EXPR: /* These are only valid if they're void. */ return TREE_TYPE (t) == NULL || VOID_TYPE_P (TREE_TYPE (t)); case SWITCH_EXPR: case GOTO_EXPR: case RETURN_EXPR: case LABEL_EXPR: case CASE_LABEL_EXPR: case TRY_CATCH_EXPR: case TRY_FINALLY_EXPR: case EH_FILTER_EXPR: case CATCH_EXPR: case ASM_EXPR: case STATEMENT_LIST: case OACC_PARALLEL: case OACC_KERNELS: case OACC_SERIAL: case OACC_DATA: case OACC_HOST_DATA: case OACC_DECLARE: case OACC_UPDATE: case OACC_ENTER_DATA: case OACC_EXIT_DATA: case OACC_CACHE: case OMP_PARALLEL: case OMP_FOR: case OMP_SIMD: case OMP_DISTRIBUTE: case OMP_LOOP: case OACC_LOOP: case OMP_SCAN: case OMP_SCOPE: case OMP_SECTIONS: case OMP_SECTION: case OMP_SINGLE: case OMP_MASTER: case OMP_MASKED: case OMP_TASKGROUP: case OMP_ORDERED: case OMP_CRITICAL: case OMP_TASK: case OMP_TARGET: case OMP_TARGET_DATA: case OMP_TARGET_UPDATE: case OMP_TARGET_ENTER_DATA: case OMP_TARGET_EXIT_DATA: case OMP_TASKLOOP: case OMP_TEAMS: /* These are always void. */ return true; case CALL_EXPR: case MODIFY_EXPR: case PREDICT_EXPR: /* These are valid regardless of their type. */ return true; default: return false; } } /* Promote partial stores to COMPLEX variables to total stores. *EXPR_P is a MODIFY_EXPR with a lhs of a REAL/IMAGPART_EXPR of a gimple register. IMPORTANT NOTE: This promotion is performed by introducing a load of the other, unmodified part of the complex object just before the total store. As a consequence, if the object is still uninitialized, an undefined value will be loaded into a register, which may result in a spurious exception if the register is floating-point and the value happens to be a signaling NaN for example. Then the fully-fledged complex operations lowering pass followed by a DCE pass are necessary in order to fix things up. */ static enum gimplify_status gimplify_modify_expr_complex_part (tree *expr_p, gimple_seq *pre_p, bool want_value) { enum tree_code code, ocode; tree lhs, rhs, new_rhs, other, realpart, imagpart; lhs = TREE_OPERAND (*expr_p, 0); rhs = TREE_OPERAND (*expr_p, 1); code = TREE_CODE (lhs); lhs = TREE_OPERAND (lhs, 0); ocode = code == REALPART_EXPR ? IMAGPART_EXPR : REALPART_EXPR; other = build1 (ocode, TREE_TYPE (rhs), lhs); suppress_warning (other); other = get_formal_tmp_var (other, pre_p); realpart = code == REALPART_EXPR ? rhs : other; imagpart = code == REALPART_EXPR ? other : rhs; if (TREE_CONSTANT (realpart) && TREE_CONSTANT (imagpart)) new_rhs = build_complex (TREE_TYPE (lhs), realpart, imagpart); else new_rhs = build2 (COMPLEX_EXPR, TREE_TYPE (lhs), realpart, imagpart); gimplify_seq_add_stmt (pre_p, gimple_build_assign (lhs, new_rhs)); *expr_p = (want_value) ? rhs : NULL_TREE; return GS_ALL_DONE; } /* Gimplify the MODIFY_EXPR node pointed to by EXPR_P. modify_expr : varname '=' rhs | '*' ID '=' rhs PRE_P points to the list where side effects that must happen before *EXPR_P should be stored. POST_P points to the list where side effects that must happen after *EXPR_P should be stored. WANT_VALUE is nonzero iff we want to use the value of this expression in another expression. */ static enum gimplify_status gimplify_modify_expr (tree *expr_p, gimple_seq *pre_p, gimple_seq *post_p, bool want_value) { tree *from_p = &TREE_OPERAND (*expr_p, 1); tree *to_p = &TREE_OPERAND (*expr_p, 0); enum gimplify_status ret = GS_UNHANDLED; gimple *assign; location_t loc = EXPR_LOCATION (*expr_p); gimple_stmt_iterator gsi; gcc_assert (TREE_CODE (*expr_p) == MODIFY_EXPR || TREE_CODE (*expr_p) == INIT_EXPR); /* Trying to simplify a clobber using normal logic doesn't work, so handle it here. */ if (TREE_CLOBBER_P (*from_p)) { ret = gimplify_expr (to_p, pre_p, post_p, is_gimple_lvalue, fb_lvalue); if (ret == GS_ERROR) return ret; gcc_assert (!want_value); if (!VAR_P (*to_p) && TREE_CODE (*to_p) != MEM_REF) { tree addr = get_initialized_tmp_var (build_fold_addr_expr (*to_p), pre_p, post_p); *to_p = build_simple_mem_ref_loc (EXPR_LOCATION (*to_p), addr); } gimplify_seq_add_stmt (pre_p, gimple_build_assign (*to_p, *from_p)); *expr_p = NULL; return GS_ALL_DONE; } /* Insert pointer conversions required by the middle-end that are not required by the frontend. This fixes middle-end type checking for for example gcc.dg/redecl-6.c. */ if (POINTER_TYPE_P (TREE_TYPE (*to_p))) { STRIP_USELESS_TYPE_CONVERSION (*from_p); if (!useless_type_conversion_p (TREE_TYPE (*to_p), TREE_TYPE (*from_p))) *from_p = fold_convert_loc (loc, TREE_TYPE (*to_p), *from_p); } /* See if any simplifications can be done based on what the RHS is. */ ret = gimplify_modify_expr_rhs (expr_p, from_p, to_p, pre_p, post_p, want_value); if (ret != GS_UNHANDLED) return ret; /* For empty types only gimplify the left hand side and right hand side as statements and throw away the assignment. Do this after gimplify_modify_expr_rhs so we handle TARGET_EXPRs of addressable types properly. */ if (is_empty_type (TREE_TYPE (*from_p)) && !want_value /* Don't do this for calls that return addressable types, expand_call relies on those having a lhs. */ && !(TREE_ADDRESSABLE (TREE_TYPE (*from_p)) && TREE_CODE (*from_p) == CALL_EXPR)) { gimplify_stmt (from_p, pre_p); gimplify_stmt (to_p, pre_p); *expr_p = NULL_TREE; return GS_ALL_DONE; } /* If the value being copied is of variable width, compute the length of the copy into a WITH_SIZE_EXPR. Note that we need to do this before gimplifying any of the operands so that we can resolve any PLACEHOLDER_EXPRs in the size. Also note that the RTL expander uses the size of the expression to be copied, not of the destination, so that is what we must do here. */ maybe_with_size_expr (from_p); /* As a special case, we have to temporarily allow for assignments with a CALL_EXPR on the RHS. Since in GIMPLE a function call is a toplevel statement, when gimplifying the GENERIC expression MODIFY_EXPR >, we cannot create the tuple GIMPLE_ASSIGN >. Instead, we need to create the tuple GIMPLE_CALL . To prevent gimplify_expr from trying to create a new temporary for foo's LHS, we tell it that it should only gimplify until it reaches the CALL_EXPR. On return from gimplify_expr, the newly created GIMPLE_CALL will be the last statement in *PRE_P and all we need to do here is set 'a' to be its LHS. */ /* Gimplify the RHS first for C++17 and bug 71104. */ gimple_predicate initial_pred = initial_rhs_predicate_for (*to_p); ret = gimplify_expr (from_p, pre_p, post_p, initial_pred, fb_rvalue); if (ret == GS_ERROR) return ret; /* Then gimplify the LHS. */ /* If we gimplified the RHS to a CALL_EXPR and that call may return twice we have to make sure to gimplify into non-SSA as otherwise the abnormal edge added later will make those defs not dominate their uses. ??? Technically this applies only to the registers used in the resulting non-register *TO_P. */ bool saved_into_ssa = gimplify_ctxp->into_ssa; if (saved_into_ssa && TREE_CODE (*from_p) == CALL_EXPR && call_expr_flags (*from_p) & ECF_RETURNS_TWICE) gimplify_ctxp->into_ssa = false; ret = gimplify_expr (to_p, pre_p, post_p, is_gimple_lvalue, fb_lvalue); gimplify_ctxp->into_ssa = saved_into_ssa; if (ret == GS_ERROR) return ret; /* Now that the LHS is gimplified, re-gimplify the RHS if our initial guess for the predicate was wrong. */ gimple_predicate final_pred = rhs_predicate_for (*to_p); if (final_pred != initial_pred) { ret = gimplify_expr (from_p, pre_p, post_p, final_pred, fb_rvalue); if (ret == GS_ERROR) return ret; } /* In case of va_arg internal fn wrappped in a WITH_SIZE_EXPR, add the type size as argument to the call. */ if (TREE_CODE (*from_p) == WITH_SIZE_EXPR) { tree call = TREE_OPERAND (*from_p, 0); tree vlasize = TREE_OPERAND (*from_p, 1); if (TREE_CODE (call) == CALL_EXPR && CALL_EXPR_IFN (call) == IFN_VA_ARG) { int nargs = call_expr_nargs (call); tree type = TREE_TYPE (call); tree ap = CALL_EXPR_ARG (call, 0); tree tag = CALL_EXPR_ARG (call, 1); tree aptag = CALL_EXPR_ARG (call, 2); tree newcall = build_call_expr_internal_loc (EXPR_LOCATION (call), IFN_VA_ARG, type, nargs + 1, ap, tag, aptag, vlasize); TREE_OPERAND (*from_p, 0) = newcall; } } /* Now see if the above changed *from_p to something we handle specially. */ ret = gimplify_modify_expr_rhs (expr_p, from_p, to_p, pre_p, post_p, want_value); if (ret != GS_UNHANDLED) return ret; /* If we've got a variable sized assignment between two lvalues (i.e. does not involve a call), then we can make things a bit more straightforward by converting the assignment to memcpy or memset. */ if (TREE_CODE (*from_p) == WITH_SIZE_EXPR) { tree from = TREE_OPERAND (*from_p, 0); tree size = TREE_OPERAND (*from_p, 1); if (TREE_CODE (from) == CONSTRUCTOR) return gimplify_modify_expr_to_memset (expr_p, size, want_value, pre_p); if (is_gimple_addressable (from)) { *from_p = from; return gimplify_modify_expr_to_memcpy (expr_p, size, want_value, pre_p); } } /* Transform partial stores to non-addressable complex variables into total stores. This allows us to use real instead of virtual operands for these variables, which improves optimization. */ if ((TREE_CODE (*to_p) == REALPART_EXPR || TREE_CODE (*to_p) == IMAGPART_EXPR) && is_gimple_reg (TREE_OPERAND (*to_p, 0))) return gimplify_modify_expr_complex_part (expr_p, pre_p, want_value); /* Try to alleviate the effects of the gimplification creating artificial temporaries (see for example is_gimple_reg_rhs) on the debug info, but make sure not to create DECL_DEBUG_EXPR links across functions. */ if (!gimplify_ctxp->into_ssa && VAR_P (*from_p) && DECL_IGNORED_P (*from_p) && DECL_P (*to_p) && !DECL_IGNORED_P (*to_p) && decl_function_context (*to_p) == current_function_decl && decl_function_context (*from_p) == current_function_decl) { if (!DECL_NAME (*from_p) && DECL_NAME (*to_p)) DECL_NAME (*from_p) = create_tmp_var_name (IDENTIFIER_POINTER (DECL_NAME (*to_p))); DECL_HAS_DEBUG_EXPR_P (*from_p) = 1; SET_DECL_DEBUG_EXPR (*from_p, *to_p); } if (want_value && TREE_THIS_VOLATILE (*to_p)) *from_p = get_initialized_tmp_var (*from_p, pre_p, post_p); if (TREE_CODE (*from_p) == CALL_EXPR) { /* Since the RHS is a CALL_EXPR, we need to create a GIMPLE_CALL instead of a GIMPLE_ASSIGN. */ gcall *call_stmt; if (CALL_EXPR_FN (*from_p) == NULL_TREE) { /* Gimplify internal functions created in the FEs. */ int nargs = call_expr_nargs (*from_p), i; enum internal_fn ifn = CALL_EXPR_IFN (*from_p); auto_vec vargs (nargs); for (i = 0; i < nargs; i++) { gimplify_arg (&CALL_EXPR_ARG (*from_p, i), pre_p, EXPR_LOCATION (*from_p)); vargs.quick_push (CALL_EXPR_ARG (*from_p, i)); } call_stmt = gimple_build_call_internal_vec (ifn, vargs); gimple_call_set_nothrow (call_stmt, TREE_NOTHROW (*from_p)); gimple_set_location (call_stmt, EXPR_LOCATION (*expr_p)); } else { tree fnptrtype = TREE_TYPE (CALL_EXPR_FN (*from_p)); CALL_EXPR_FN (*from_p) = TREE_OPERAND (CALL_EXPR_FN (*from_p), 0); STRIP_USELESS_TYPE_CONVERSION (CALL_EXPR_FN (*from_p)); tree fndecl = get_callee_fndecl (*from_p); if (fndecl && fndecl_built_in_p (fndecl, BUILT_IN_EXPECT) && call_expr_nargs (*from_p) == 3) call_stmt = gimple_build_call_internal (IFN_BUILTIN_EXPECT, 3, CALL_EXPR_ARG (*from_p, 0), CALL_EXPR_ARG (*from_p, 1), CALL_EXPR_ARG (*from_p, 2)); else { call_stmt = gimple_build_call_from_tree (*from_p, fnptrtype); } } notice_special_calls (call_stmt); if (!gimple_call_noreturn_p (call_stmt) || !should_remove_lhs_p (*to_p)) gimple_call_set_lhs (call_stmt, *to_p); else if (TREE_CODE (*to_p) == SSA_NAME) /* The above is somewhat premature, avoid ICEing later for a SSA name w/o a definition. We may have uses in the GIMPLE IL. ??? This doesn't make it a default-def. */ SSA_NAME_DEF_STMT (*to_p) = gimple_build_nop (); assign = call_stmt; } else { assign = gimple_build_assign (*to_p, *from_p); gimple_set_location (assign, EXPR_LOCATION (*expr_p)); if (COMPARISON_CLASS_P (*from_p)) copy_warning (assign, *from_p); } if (gimplify_ctxp->into_ssa && is_gimple_reg (*to_p)) { /* We should have got an SSA name from the start. */ gcc_assert (TREE_CODE (*to_p) == SSA_NAME || ! gimple_in_ssa_p (cfun)); } gimplify_seq_add_stmt (pre_p, assign); gsi = gsi_last (*pre_p); maybe_fold_stmt (&gsi); if (want_value) { *expr_p = TREE_THIS_VOLATILE (*to_p) ? *from_p : unshare_expr (*to_p); return GS_OK; } else *expr_p = NULL; return GS_ALL_DONE; } /* Gimplify a comparison between two variable-sized objects. Do this with a call to BUILT_IN_MEMCMP. */ static enum gimplify_status gimplify_variable_sized_compare (tree *expr_p) { location_t loc = EXPR_LOCATION (*expr_p); tree op0 = TREE_OPERAND (*expr_p, 0); tree op1 = TREE_OPERAND (*expr_p, 1); tree t, arg, dest, src, expr; arg = TYPE_SIZE_UNIT (TREE_TYPE (op0)); arg = unshare_expr (arg); arg = SUBSTITUTE_PLACEHOLDER_IN_EXPR (arg, op0); src = build_fold_addr_expr_loc (loc, op1); dest = build_fold_addr_expr_loc (loc, op0); t = builtin_decl_implicit (BUILT_IN_MEMCMP); t = build_call_expr_loc (loc, t, 3, dest, src, arg); expr = build2 (TREE_CODE (*expr_p), TREE_TYPE (*expr_p), t, integer_zero_node); SET_EXPR_LOCATION (expr, loc); *expr_p = expr; return GS_OK; } /* Gimplify a comparison between two aggregate objects of integral scalar mode as a comparison between the bitwise equivalent scalar values. */ static enum gimplify_status gimplify_scalar_mode_aggregate_compare (tree *expr_p) { location_t loc = EXPR_LOCATION (*expr_p); tree op0 = TREE_OPERAND (*expr_p, 0); tree op1 = TREE_OPERAND (*expr_p, 1); tree type = TREE_TYPE (op0); tree scalar_type = lang_hooks.types.type_for_mode (TYPE_MODE (type), 1); op0 = fold_build1_loc (loc, VIEW_CONVERT_EXPR, scalar_type, op0); op1 = fold_build1_loc (loc, VIEW_CONVERT_EXPR, scalar_type, op1); *expr_p = fold_build2_loc (loc, TREE_CODE (*expr_p), TREE_TYPE (*expr_p), op0, op1); return GS_OK; } /* Gimplify an expression sequence. This function gimplifies each expression and rewrites the original expression with the last expression of the sequence in GIMPLE form. PRE_P points to the list where the side effects for all the expressions in the sequence will be emitted. WANT_VALUE is true when the result of the last COMPOUND_EXPR is used. */ static enum gimplify_status gimplify_compound_expr (tree *expr_p, gimple_seq *pre_p, bool want_value) { tree t = *expr_p; do { tree *sub_p = &TREE_OPERAND (t, 0); if (TREE_CODE (*sub_p) == COMPOUND_EXPR) gimplify_compound_expr (sub_p, pre_p, false); else gimplify_stmt (sub_p, pre_p); t = TREE_OPERAND (t, 1); } while (TREE_CODE (t) == COMPOUND_EXPR); *expr_p = t; if (want_value) return GS_OK; else { gimplify_stmt (expr_p, pre_p); return GS_ALL_DONE; } } /* Gimplify a SAVE_EXPR node. EXPR_P points to the expression to gimplify. After gimplification, EXPR_P will point to a new temporary that holds the original value of the SAVE_EXPR node. PRE_P points to the list where side effects that must happen before *EXPR_P should be stored. */ static enum gimplify_status gimplify_save_expr (tree *expr_p, gimple_seq *pre_p, gimple_seq *post_p) { enum gimplify_status ret = GS_ALL_DONE; tree val; gcc_assert (TREE_CODE (*expr_p) == SAVE_EXPR); val = TREE_OPERAND (*expr_p, 0); if (val && TREE_TYPE (val) == error_mark_node) return GS_ERROR; /* If the SAVE_EXPR has not been resolved, then evaluate it once. */ if (!SAVE_EXPR_RESOLVED_P (*expr_p)) { /* The operand may be a void-valued expression. It is being executed only for its side-effects. */ if (TREE_TYPE (val) == void_type_node) { ret = gimplify_expr (&TREE_OPERAND (*expr_p, 0), pre_p, post_p, is_gimple_stmt, fb_none); val = NULL; } else /* The temporary may not be an SSA name as later abnormal and EH control flow may invalidate use/def domination. When in SSA form then assume there are no such issues and SAVE_EXPRs only appear via GENERIC foldings. */ val = get_initialized_tmp_var (val, pre_p, post_p, gimple_in_ssa_p (cfun)); TREE_OPERAND (*expr_p, 0) = val; SAVE_EXPR_RESOLVED_P (*expr_p) = 1; } *expr_p = val; return ret; } /* Rewrite the ADDR_EXPR node pointed to by EXPR_P unary_expr : ... | '&' varname ... PRE_P points to the list where side effects that must happen before *EXPR_P should be stored. POST_P points to the list where side effects that must happen after *EXPR_P should be stored. */ static enum gimplify_status gimplify_addr_expr (tree *expr_p, gimple_seq *pre_p, gimple_seq *post_p) { tree expr = *expr_p; tree op0 = TREE_OPERAND (expr, 0); enum gimplify_status ret; location_t loc = EXPR_LOCATION (*expr_p); switch (TREE_CODE (op0)) { case INDIRECT_REF: do_indirect_ref: /* Check if we are dealing with an expression of the form '&*ptr'. While the front end folds away '&*ptr' into 'ptr', these expressions may be generated internally by the compiler (e.g., builtins like __builtin_va_end). */ /* Caution: the silent array decomposition semantics we allow for ADDR_EXPR means we can't always discard the pair. */ /* Gimplification of the ADDR_EXPR operand may drop cv-qualification conversions, so make sure we add them if needed. */ { tree op00 = TREE_OPERAND (op0, 0); tree t_expr = TREE_TYPE (expr); tree t_op00 = TREE_TYPE (op00); if (!useless_type_conversion_p (t_expr, t_op00)) op00 = fold_convert_loc (loc, TREE_TYPE (expr), op00); *expr_p = op00; ret = GS_OK; } break; case VIEW_CONVERT_EXPR: /* Take the address of our operand and then convert it to the type of this ADDR_EXPR. ??? The interactions of VIEW_CONVERT_EXPR and aliasing is not at all clear. The impact of this transformation is even less clear. */ /* If the operand is a useless conversion, look through it. Doing so guarantees that the ADDR_EXPR and its operand will remain of the same type. */ if (tree_ssa_useless_type_conversion (TREE_OPERAND (op0, 0))) op0 = TREE_OPERAND (op0, 0); *expr_p = fold_convert_loc (loc, TREE_TYPE (expr), build_fold_addr_expr_loc (loc, TREE_OPERAND (op0, 0))); ret = GS_OK; break; case MEM_REF: if (integer_zerop (TREE_OPERAND (op0, 1))) goto do_indirect_ref; /* fall through */ default: /* If we see a call to a declared builtin or see its address being taken (we can unify those cases here) then we can mark the builtin for implicit generation by GCC. */ if (TREE_CODE (op0) == FUNCTION_DECL && fndecl_built_in_p (op0, BUILT_IN_NORMAL) && builtin_decl_declared_p (DECL_FUNCTION_CODE (op0))) set_builtin_decl_implicit_p (DECL_FUNCTION_CODE (op0), true); /* We use fb_either here because the C frontend sometimes takes the address of a call that returns a struct; see gcc.dg/c99-array-lval-1.c. The gimplifier will correctly make the implied temporary explicit. */ /* Make the operand addressable. */ ret = gimplify_expr (&TREE_OPERAND (expr, 0), pre_p, post_p, is_gimple_addressable, fb_either); if (ret == GS_ERROR) break; /* Then mark it. Beware that it may not be possible to do so directly if a temporary has been created by the gimplification. */ prepare_gimple_addressable (&TREE_OPERAND (expr, 0), pre_p); op0 = TREE_OPERAND (expr, 0); /* For various reasons, the gimplification of the expression may have made a new INDIRECT_REF. */ if (TREE_CODE (op0) == INDIRECT_REF || (TREE_CODE (op0) == MEM_REF && integer_zerop (TREE_OPERAND (op0, 1)))) goto do_indirect_ref; mark_addressable (TREE_OPERAND (expr, 0)); /* The FEs may end up building ADDR_EXPRs early on a decl with an incomplete type. Re-build ADDR_EXPRs in canonical form here. */ if (!types_compatible_p (TREE_TYPE (op0), TREE_TYPE (TREE_TYPE (expr)))) *expr_p = build_fold_addr_expr (op0); /* Make sure TREE_CONSTANT and TREE_SIDE_EFFECTS are set properly. */ recompute_tree_invariant_for_addr_expr (*expr_p); /* If we re-built the ADDR_EXPR add a conversion to the original type if required. */ if (!useless_type_conversion_p (TREE_TYPE (expr), TREE_TYPE (*expr_p))) *expr_p = fold_convert (TREE_TYPE (expr), *expr_p); break; } return ret; } /* Gimplify the operands of an ASM_EXPR. Input operands should be a gimple value; output operands should be a gimple lvalue. */ static enum gimplify_status gimplify_asm_expr (tree *expr_p, gimple_seq *pre_p, gimple_seq *post_p) { tree expr; int noutputs; const char **oconstraints; int i; tree link; const char *constraint; bool allows_mem, allows_reg, is_inout; enum gimplify_status ret, tret; gasm *stmt; vec *inputs; vec *outputs; vec *clobbers; vec *labels; tree link_next; expr = *expr_p; noutputs = list_length (ASM_OUTPUTS (expr)); oconstraints = (const char **) alloca ((noutputs) * sizeof (const char *)); inputs = NULL; outputs = NULL; clobbers = NULL; labels = NULL; ret = GS_ALL_DONE; link_next = NULL_TREE; for (i = 0, link = ASM_OUTPUTS (expr); link; ++i, link = link_next) { bool ok; size_t constraint_len; link_next = TREE_CHAIN (link); oconstraints[i] = constraint = TREE_STRING_POINTER (TREE_VALUE (TREE_PURPOSE (link))); constraint_len = strlen (constraint); if (constraint_len == 0) continue; ok = parse_output_constraint (&constraint, i, 0, 0, &allows_mem, &allows_reg, &is_inout); if (!ok) { ret = GS_ERROR; is_inout = false; } /* If we can't make copies, we can only accept memory. Similarly for VLAs. */ tree outtype = TREE_TYPE (TREE_VALUE (link)); if (outtype != error_mark_node && (TREE_ADDRESSABLE (outtype) || !COMPLETE_TYPE_P (outtype) || !tree_fits_poly_uint64_p (TYPE_SIZE_UNIT (outtype)))) { if (allows_mem) allows_reg = 0; else { error ("impossible constraint in %"); error ("non-memory output %d must stay in memory", i); return GS_ERROR; } } if (!allows_reg && allows_mem) mark_addressable (TREE_VALUE (link)); tree orig = TREE_VALUE (link); tret = gimplify_expr (&TREE_VALUE (link), pre_p, post_p, is_inout ? is_gimple_min_lval : is_gimple_lvalue, fb_lvalue | fb_mayfail); if (tret == GS_ERROR) { if (orig != error_mark_node) error ("invalid lvalue in % output %d", i); ret = tret; } /* If the constraint does not allow memory make sure we gimplify it to a register if it is not already but its base is. This happens for complex and vector components. */ if (!allows_mem) { tree op = TREE_VALUE (link); if (! is_gimple_val (op) && is_gimple_reg_type (TREE_TYPE (op)) && is_gimple_reg (get_base_address (op))) { tree tem = create_tmp_reg (TREE_TYPE (op)); tree ass; if (is_inout) { ass = build2 (MODIFY_EXPR, TREE_TYPE (tem), tem, unshare_expr (op)); gimplify_and_add (ass, pre_p); } ass = build2 (MODIFY_EXPR, TREE_TYPE (tem), op, tem); gimplify_and_add (ass, post_p); TREE_VALUE (link) = tem; tret = GS_OK; } } vec_safe_push (outputs, link); TREE_CHAIN (link) = NULL_TREE; if (is_inout) { /* An input/output operand. To give the optimizers more flexibility, split it into separate input and output operands. */ tree input; /* Buffer big enough to format a 32-bit UINT_MAX into. */ char buf[11]; /* Turn the in/out constraint into an output constraint. */ char *p = xstrdup (constraint); p[0] = '='; TREE_VALUE (TREE_PURPOSE (link)) = build_string (constraint_len, p); /* And add a matching input constraint. */ if (allows_reg) { sprintf (buf, "%u", i); /* If there are multiple alternatives in the constraint, handle each of them individually. Those that allow register will be replaced with operand number, the others will stay unchanged. */ if (strchr (p, ',') != NULL) { size_t len = 0, buflen = strlen (buf); char *beg, *end, *str, *dst; for (beg = p + 1;;) { end = strchr (beg, ','); if (end == NULL) end = strchr (beg, '\0'); if ((size_t) (end - beg) < buflen) len += buflen + 1; else len += end - beg + 1; if (*end) beg = end + 1; else break; } str = (char *) alloca (len); for (beg = p + 1, dst = str;;) { const char *tem; bool mem_p, reg_p, inout_p; end = strchr (beg, ','); if (end) *end = '\0'; beg[-1] = '='; tem = beg - 1; parse_output_constraint (&tem, i, 0, 0, &mem_p, ®_p, &inout_p); if (dst != str) *dst++ = ','; if (reg_p) { memcpy (dst, buf, buflen); dst += buflen; } else { if (end) len = end - beg; else len = strlen (beg); memcpy (dst, beg, len); dst += len; } if (end) beg = end + 1; else break; } *dst = '\0'; input = build_string (dst - str, str); } else input = build_string (strlen (buf), buf); } else input = build_string (constraint_len - 1, constraint + 1); free (p); input = build_tree_list (build_tree_list (NULL_TREE, input), unshare_expr (TREE_VALUE (link))); ASM_INPUTS (expr) = chainon (ASM_INPUTS (expr), input); } } link_next = NULL_TREE; for (link = ASM_INPUTS (expr); link; ++i, link = link_next) { link_next = TREE_CHAIN (link); constraint = TREE_STRING_POINTER (TREE_VALUE (TREE_PURPOSE (link))); parse_input_constraint (&constraint, 0, 0, noutputs, 0, oconstraints, &allows_mem, &allows_reg); /* If we can't make copies, we can only accept memory. */ tree intype = TREE_TYPE (TREE_VALUE (link)); if (intype != error_mark_node && (TREE_ADDRESSABLE (intype) || !COMPLETE_TYPE_P (intype) || !tree_fits_poly_uint64_p (TYPE_SIZE_UNIT (intype)))) { if (allows_mem) allows_reg = 0; else { error ("impossible constraint in %"); error ("non-memory input %d must stay in memory", i); return GS_ERROR; } } /* If the operand is a memory input, it should be an lvalue. */ if (!allows_reg && allows_mem) { tree inputv = TREE_VALUE (link); STRIP_NOPS (inputv); if (TREE_CODE (inputv) == PREDECREMENT_EXPR || TREE_CODE (inputv) == PREINCREMENT_EXPR || TREE_CODE (inputv) == POSTDECREMENT_EXPR || TREE_CODE (inputv) == POSTINCREMENT_EXPR || TREE_CODE (inputv) == MODIFY_EXPR) TREE_VALUE (link) = error_mark_node; tret = gimplify_expr (&TREE_VALUE (link), pre_p, post_p, is_gimple_lvalue, fb_lvalue | fb_mayfail); if (tret != GS_ERROR) { /* Unlike output operands, memory inputs are not guaranteed to be lvalues by the FE, and while the expressions are marked addressable there, if it is e.g. a statement expression, temporaries in it might not end up being addressable. They might be already used in the IL and thus it is too late to make them addressable now though. */ tree x = TREE_VALUE (link); while (handled_component_p (x)) x = TREE_OPERAND (x, 0); if (TREE_CODE (x) == MEM_REF && TREE_CODE (TREE_OPERAND (x, 0)) == ADDR_EXPR) x = TREE_OPERAND (TREE_OPERAND (x, 0), 0); if ((VAR_P (x) || TREE_CODE (x) == PARM_DECL || TREE_CODE (x) == RESULT_DECL) && !TREE_ADDRESSABLE (x) && is_gimple_reg (x)) { warning_at (EXPR_LOC_OR_LOC (TREE_VALUE (link), input_location), 0, "memory input %d is not directly addressable", i); prepare_gimple_addressable (&TREE_VALUE (link), pre_p); } } mark_addressable (TREE_VALUE (link)); if (tret == GS_ERROR) { if (inputv != error_mark_node) error_at (EXPR_LOC_OR_LOC (TREE_VALUE (link), input_location), "memory input %d is not directly addressable", i); ret = tret; } } else { tret = gimplify_expr (&TREE_VALUE (link), pre_p, post_p, is_gimple_asm_val, fb_rvalue); if (tret == GS_ERROR) ret = tret; } TREE_CHAIN (link) = NULL_TREE; vec_safe_push (inputs, link); } link_next = NULL_TREE; for (link = ASM_CLOBBERS (expr); link; ++i, link = link_next) { link_next = TREE_CHAIN (link); TREE_CHAIN (link) = NULL_TREE; vec_safe_push (clobbers, link); } link_next = NULL_TREE; for (link = ASM_LABELS (expr); link; ++i, link = link_next) { link_next = TREE_CHAIN (link); TREE_CHAIN (link) = NULL_TREE; vec_safe_push (labels, link); } /* Do not add ASMs with errors to the gimple IL stream. */ if (ret != GS_ERROR) { stmt = gimple_build_asm_vec (TREE_STRING_POINTER (ASM_STRING (expr)), inputs, outputs, clobbers, labels); gimple_asm_set_volatile (stmt, ASM_VOLATILE_P (expr) || noutputs == 0); gimple_asm_set_input (stmt, ASM_INPUT_P (expr)); gimple_asm_set_inline (stmt, ASM_INLINE_P (expr)); gimplify_seq_add_stmt (pre_p, stmt); } return ret; } /* Gimplify a CLEANUP_POINT_EXPR. Currently this works by adding GIMPLE_WITH_CLEANUP_EXPRs to the prequeue as we encounter cleanups while gimplifying the body, and converting them to TRY_FINALLY_EXPRs when we return to this function. FIXME should we complexify the prequeue handling instead? Or use flags for all the cleanups and let the optimizer tighten them up? The current code seems pretty fragile; it will break on a cleanup within any non-conditional nesting. But any such nesting would be broken, anyway; we can't write a TRY_FINALLY_EXPR that starts inside a nesting construct and continues out of it. We can do that at the RTL level, though, so having an optimizer to tighten up try/finally regions would be a Good Thing. */ static enum gimplify_status gimplify_cleanup_point_expr (tree *expr_p, gimple_seq *pre_p) { gimple_stmt_iterator iter; gimple_seq body_sequence = NULL; tree temp = voidify_wrapper_expr (*expr_p, NULL); /* We only care about the number of conditions between the innermost CLEANUP_POINT_EXPR and the cleanup. So save and reset the count and any cleanups collected outside the CLEANUP_POINT_EXPR. */ int old_conds = gimplify_ctxp->conditions; gimple_seq old_cleanups = gimplify_ctxp->conditional_cleanups; bool old_in_cleanup_point_expr = gimplify_ctxp->in_cleanup_point_expr; gimplify_ctxp->conditions = 0; gimplify_ctxp->conditional_cleanups = NULL; gimplify_ctxp->in_cleanup_point_expr = true; gimplify_stmt (&TREE_OPERAND (*expr_p, 0), &body_sequence); gimplify_ctxp->conditions = old_conds; gimplify_ctxp->conditional_cleanups = old_cleanups; gimplify_ctxp->in_cleanup_point_expr = old_in_cleanup_point_expr; for (iter = gsi_start (body_sequence); !gsi_end_p (iter); ) { gimple *wce = gsi_stmt (iter); if (gimple_code (wce) == GIMPLE_WITH_CLEANUP_EXPR) { if (gsi_one_before_end_p (iter)) { /* Note that gsi_insert_seq_before and gsi_remove do not scan operands, unlike some other sequence mutators. */ if (!gimple_wce_cleanup_eh_only (wce)) gsi_insert_seq_before_without_update (&iter, gimple_wce_cleanup (wce), GSI_SAME_STMT); gsi_remove (&iter, true); break; } else { gtry *gtry; gimple_seq seq; enum gimple_try_flags kind; if (gimple_wce_cleanup_eh_only (wce)) kind = GIMPLE_TRY_CATCH; else kind = GIMPLE_TRY_FINALLY; seq = gsi_split_seq_after (iter); gtry = gimple_build_try (seq, gimple_wce_cleanup (wce), kind); /* Do not use gsi_replace here, as it may scan operands. We want to do a simple structural modification only. */ gsi_set_stmt (&iter, gtry); iter = gsi_start (gtry->eval); } } else gsi_next (&iter); } gimplify_seq_add_seq (pre_p, body_sequence); if (temp) { *expr_p = temp; return GS_OK; } else { *expr_p = NULL; return GS_ALL_DONE; } } /* Insert a cleanup marker for gimplify_cleanup_point_expr. CLEANUP is the cleanup action required. EH_ONLY is true if the cleanup should only be executed if an exception is thrown, not on normal exit. If FORCE_UNCOND is true perform the cleanup unconditionally; this is only valid for clobbers. */ static void gimple_push_cleanup (tree var, tree cleanup, bool eh_only, gimple_seq *pre_p, bool force_uncond = false) { gimple *wce; gimple_seq cleanup_stmts = NULL; /* Errors can result in improperly nested cleanups. Which results in confusion when trying to resolve the GIMPLE_WITH_CLEANUP_EXPR. */ if (seen_error ()) return; if (gimple_conditional_context ()) { /* If we're in a conditional context, this is more complex. We only want to run the cleanup if we actually ran the initialization that necessitates it, but we want to run it after the end of the conditional context. So we wrap the try/finally around the condition and use a flag to determine whether or not to actually run the destructor. Thus test ? f(A()) : 0 becomes (approximately) flag = 0; try { if (test) { A::A(temp); flag = 1; val = f(temp); } else { val = 0; } } finally { if (flag) A::~A(temp); } val */ if (force_uncond) { gimplify_stmt (&cleanup, &cleanup_stmts); wce = gimple_build_wce (cleanup_stmts); gimplify_seq_add_stmt (&gimplify_ctxp->conditional_cleanups, wce); } else { tree flag = create_tmp_var (boolean_type_node, "cleanup"); gassign *ffalse = gimple_build_assign (flag, boolean_false_node); gassign *ftrue = gimple_build_assign (flag, boolean_true_node); cleanup = build3 (COND_EXPR, void_type_node, flag, cleanup, NULL); gimplify_stmt (&cleanup, &cleanup_stmts); wce = gimple_build_wce (cleanup_stmts); gimple_wce_set_cleanup_eh_only (wce, eh_only); gimplify_seq_add_stmt (&gimplify_ctxp->conditional_cleanups, ffalse); gimplify_seq_add_stmt (&gimplify_ctxp->conditional_cleanups, wce); gimplify_seq_add_stmt (pre_p, ftrue); /* Because of this manipulation, and the EH edges that jump threading cannot redirect, the temporary (VAR) will appear to be used uninitialized. Don't warn. */ suppress_warning (var, OPT_Wuninitialized); } } else { gimplify_stmt (&cleanup, &cleanup_stmts); wce = gimple_build_wce (cleanup_stmts); gimple_wce_set_cleanup_eh_only (wce, eh_only); gimplify_seq_add_stmt (pre_p, wce); } } /* Gimplify a TARGET_EXPR which doesn't appear on the rhs of an INIT_EXPR. */ static enum gimplify_status gimplify_target_expr (tree *expr_p, gimple_seq *pre_p, gimple_seq *post_p) { tree targ = *expr_p; tree temp = TARGET_EXPR_SLOT (targ); tree init = TARGET_EXPR_INITIAL (targ); enum gimplify_status ret; bool unpoison_empty_seq = false; gimple_stmt_iterator unpoison_it; if (init) { gimple_seq init_pre_p = NULL; /* TARGET_EXPR temps aren't part of the enclosing block, so add it to the temps list. Handle also variable length TARGET_EXPRs. */ if (!poly_int_tree_p (DECL_SIZE (temp))) { if (!TYPE_SIZES_GIMPLIFIED (TREE_TYPE (temp))) gimplify_type_sizes (TREE_TYPE (temp), &init_pre_p); /* FIXME: this is correct only when the size of the type does not depend on expressions evaluated in init. */ gimplify_vla_decl (temp, &init_pre_p); } else { /* Save location where we need to place unpoisoning. It's possible that a variable will be converted to needs_to_live_in_memory. */ unpoison_it = gsi_last (*pre_p); unpoison_empty_seq = gsi_end_p (unpoison_it); gimple_add_tmp_var (temp); } /* If TARGET_EXPR_INITIAL is void, then the mere evaluation of the expression is supposed to initialize the slot. */ if (VOID_TYPE_P (TREE_TYPE (init))) ret = gimplify_expr (&init, &init_pre_p, post_p, is_gimple_stmt, fb_none); else { tree init_expr = build2 (INIT_EXPR, void_type_node, temp, init); init = init_expr; ret = gimplify_expr (&init, &init_pre_p, post_p, is_gimple_stmt, fb_none); init = NULL; ggc_free (init_expr); } if (ret == GS_ERROR) { /* PR c++/28266 Make sure this is expanded only once. */ TARGET_EXPR_INITIAL (targ) = NULL_TREE; return GS_ERROR; } if (init) gimplify_and_add (init, &init_pre_p); /* Add a clobber for the temporary going out of scope, like gimplify_bind_expr. */ if (gimplify_ctxp->in_cleanup_point_expr && needs_to_live_in_memory (temp)) { if (flag_stack_reuse == SR_ALL) { tree clobber = build_clobber (TREE_TYPE (temp), CLOBBER_EOL); clobber = build2 (MODIFY_EXPR, TREE_TYPE (temp), temp, clobber); gimple_push_cleanup (temp, clobber, false, pre_p, true); } if (asan_poisoned_variables && DECL_ALIGN (temp) <= MAX_SUPPORTED_STACK_ALIGNMENT && !TREE_STATIC (temp) && dbg_cnt (asan_use_after_scope) && !gimplify_omp_ctxp) { tree asan_cleanup = build_asan_poison_call_expr (temp); if (asan_cleanup) { if (unpoison_empty_seq) unpoison_it = gsi_start (*pre_p); asan_poison_variable (temp, false, &unpoison_it, unpoison_empty_seq); gimple_push_cleanup (temp, asan_cleanup, false, pre_p); } } } gimple_seq_add_seq (pre_p, init_pre_p); /* If needed, push the cleanup for the temp. */ if (TARGET_EXPR_CLEANUP (targ)) gimple_push_cleanup (temp, TARGET_EXPR_CLEANUP (targ), CLEANUP_EH_ONLY (targ), pre_p); /* Only expand this once. */ TREE_OPERAND (targ, 3) = init; TARGET_EXPR_INITIAL (targ) = NULL_TREE; } else /* We should have expanded this before. */ gcc_assert (DECL_SEEN_IN_BIND_EXPR_P (temp)); *expr_p = temp; return GS_OK; } /* Gimplification of expression trees. */ /* Gimplify an expression which appears at statement context. The corresponding GIMPLE statements are added to *SEQ_P. If *SEQ_P is NULL, a new sequence is allocated. Return true if we actually added a statement to the queue. */ bool gimplify_stmt (tree *stmt_p, gimple_seq *seq_p) { gimple_seq_node last; last = gimple_seq_last (*seq_p); gimplify_expr (stmt_p, seq_p, NULL, is_gimple_stmt, fb_none); return last != gimple_seq_last (*seq_p); } /* Add FIRSTPRIVATE entries for DECL in the OpenMP the surrounding parallels to CTX. If entries already exist, force them to be some flavor of private. If there is no enclosing parallel, do nothing. */ void omp_firstprivatize_variable (struct gimplify_omp_ctx *ctx, tree decl) { splay_tree_node n; if (decl == NULL || !DECL_P (decl) || ctx->region_type == ORT_NONE) return; do { n = splay_tree_lookup (ctx->variables, (splay_tree_key)decl); if (n != NULL) { if (n->value & GOVD_SHARED) n->value = GOVD_FIRSTPRIVATE | (n->value & GOVD_SEEN); else if (n->value & GOVD_MAP) n->value |= GOVD_MAP_TO_ONLY; else return; } else if ((ctx->region_type & ORT_TARGET) != 0) { if (ctx->defaultmap[GDMK_SCALAR] & GOVD_FIRSTPRIVATE) omp_add_variable (ctx, decl, GOVD_FIRSTPRIVATE); else omp_add_variable (ctx, decl, GOVD_MAP | GOVD_MAP_TO_ONLY); } else if (ctx->region_type != ORT_WORKSHARE && ctx->region_type != ORT_TASKGROUP && ctx->region_type != ORT_SIMD && ctx->region_type != ORT_ACC && !(ctx->region_type & ORT_TARGET_DATA)) omp_add_variable (ctx, decl, GOVD_FIRSTPRIVATE); ctx = ctx->outer_context; } while (ctx); } /* Similarly for each of the type sizes of TYPE. */ static void omp_firstprivatize_type_sizes (struct gimplify_omp_ctx *ctx, tree type) { if (type == NULL || type == error_mark_node) return; type = TYPE_MAIN_VARIANT (type); if (ctx->privatized_types->add (type)) return; switch (TREE_CODE (type)) { case INTEGER_TYPE: case ENUMERAL_TYPE: case BOOLEAN_TYPE: case REAL_TYPE: case FIXED_POINT_TYPE: omp_firstprivatize_variable (ctx, TYPE_MIN_VALUE (type)); omp_firstprivatize_variable (ctx, TYPE_MAX_VALUE (type)); break; case ARRAY_TYPE: omp_firstprivatize_type_sizes (ctx, TREE_TYPE (type)); omp_firstprivatize_type_sizes (ctx, TYPE_DOMAIN (type)); break; case RECORD_TYPE: case UNION_TYPE: case QUAL_UNION_TYPE: { tree field; for (field = TYPE_FIELDS (type); field; field = DECL_CHAIN (field)) if (TREE_CODE (field) == FIELD_DECL) { omp_firstprivatize_variable (ctx, DECL_FIELD_OFFSET (field)); omp_firstprivatize_type_sizes (ctx, TREE_TYPE (field)); } } break; case POINTER_TYPE: case REFERENCE_TYPE: omp_firstprivatize_type_sizes (ctx, TREE_TYPE (type)); break; default: break; } omp_firstprivatize_variable (ctx, TYPE_SIZE (type)); omp_firstprivatize_variable (ctx, TYPE_SIZE_UNIT (type)); lang_hooks.types.omp_firstprivatize_type_sizes (ctx, type); } /* Add an entry for DECL in the OMP context CTX with FLAGS. */ static void omp_add_variable (struct gimplify_omp_ctx *ctx, tree decl, unsigned int flags) { splay_tree_node n; unsigned int nflags; tree t; if (error_operand_p (decl) || ctx->region_type == ORT_NONE) return; /* Never elide decls whose type has TREE_ADDRESSABLE set. This means there are constructors involved somewhere. Exception is a shared clause, there is nothing privatized in that case. */ if ((flags & GOVD_SHARED) == 0 && (TREE_ADDRESSABLE (TREE_TYPE (decl)) || TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl)))) flags |= GOVD_SEEN; n = splay_tree_lookup (ctx->variables, (splay_tree_key)decl); if (n != NULL && (n->value & GOVD_DATA_SHARE_CLASS) != 0) { /* We shouldn't be re-adding the decl with the same data sharing class. */ gcc_assert ((n->value & GOVD_DATA_SHARE_CLASS & flags) == 0); nflags = n->value | flags; /* The only combination of data sharing classes we should see is FIRSTPRIVATE and LASTPRIVATE. However, OpenACC permits reduction variables to be used in data sharing clauses. */ gcc_assert ((ctx->region_type & ORT_ACC) != 0 || ((nflags & GOVD_DATA_SHARE_CLASS) == (GOVD_FIRSTPRIVATE | GOVD_LASTPRIVATE)) || (flags & GOVD_DATA_SHARE_CLASS) == 0); n->value = nflags; return; } /* When adding a variable-sized variable, we have to handle all sorts of additional bits of data: the pointer replacement variable, and the parameters of the type. */ if (DECL_SIZE (decl) && TREE_CODE (DECL_SIZE (decl)) != INTEGER_CST) { /* Add the pointer replacement variable as PRIVATE if the variable replacement is private, else FIRSTPRIVATE since we'll need the address of the original variable either for SHARED, or for the copy into or out of the context. */ if (!(flags & GOVD_LOCAL) && ctx->region_type != ORT_TASKGROUP) { if (flags & GOVD_MAP) nflags = GOVD_MAP | GOVD_MAP_TO_ONLY | GOVD_EXPLICIT; else if (flags & GOVD_PRIVATE) nflags = GOVD_PRIVATE; else if (((ctx->region_type & (ORT_TARGET | ORT_TARGET_DATA)) != 0 && (flags & GOVD_FIRSTPRIVATE)) || (ctx->region_type == ORT_TARGET_DATA && (flags & GOVD_DATA_SHARE_CLASS) == 0)) nflags = GOVD_PRIVATE | GOVD_EXPLICIT; else nflags = GOVD_FIRSTPRIVATE; nflags |= flags & GOVD_SEEN; t = DECL_VALUE_EXPR (decl); gcc_assert (TREE_CODE (t) == INDIRECT_REF); t = TREE_OPERAND (t, 0); gcc_assert (DECL_P (t)); omp_add_variable (ctx, t, nflags); } /* Add all of the variable and type parameters (which should have been gimplified to a formal temporary) as FIRSTPRIVATE. */ omp_firstprivatize_variable (ctx, DECL_SIZE_UNIT (decl)); omp_firstprivatize_variable (ctx, DECL_SIZE (decl)); omp_firstprivatize_type_sizes (ctx, TREE_TYPE (decl)); /* The variable-sized variable itself is never SHARED, only some form of PRIVATE. The sharing would take place via the pointer variable which we remapped above. */ if (flags & GOVD_SHARED) flags = GOVD_SHARED | GOVD_DEBUG_PRIVATE | (flags & (GOVD_SEEN | GOVD_EXPLICIT)); /* We're going to make use of the TYPE_SIZE_UNIT at least in the alloca statement we generate for the variable, so make sure it is available. This isn't automatically needed for the SHARED case, since we won't be allocating local storage then. For local variables TYPE_SIZE_UNIT might not be gimplified yet, in this case omp_notice_variable will be called later on when it is gimplified. */ else if (! (flags & (GOVD_LOCAL | GOVD_MAP)) && DECL_P (TYPE_SIZE_UNIT (TREE_TYPE (decl)))) omp_notice_variable (ctx, TYPE_SIZE_UNIT (TREE_TYPE (decl)), true); } else if ((flags & (GOVD_MAP | GOVD_LOCAL)) == 0 && omp_privatize_by_reference (decl)) { omp_firstprivatize_type_sizes (ctx, TREE_TYPE (decl)); /* Similar to the direct variable sized case above, we'll need the size of references being privatized. */ if ((flags & GOVD_SHARED) == 0) { t = TYPE_SIZE_UNIT (TREE_TYPE (TREE_TYPE (decl))); if (t && DECL_P (t)) omp_notice_variable (ctx, t, true); } } if (n != NULL) n->value |= flags; else splay_tree_insert (ctx->variables, (splay_tree_key)decl, flags); /* For reductions clauses in OpenACC loop directives, by default create a copy clause on the enclosing parallel construct for carrying back the results. */ if (ctx->region_type == ORT_ACC && (flags & GOVD_REDUCTION)) { struct gimplify_omp_ctx *outer_ctx = ctx->outer_context; while (outer_ctx) { n = splay_tree_lookup (outer_ctx->variables, (splay_tree_key)decl); if (n != NULL) { /* Ignore local variables and explicitly declared clauses. */ if (n->value & (GOVD_LOCAL | GOVD_EXPLICIT)) break; else if (outer_ctx->region_type == ORT_ACC_KERNELS) { /* According to the OpenACC spec, such a reduction variable should already have a copy map on a kernels construct, verify that here. */ gcc_assert (!(n->value & GOVD_FIRSTPRIVATE) && (n->value & GOVD_MAP)); } else if (outer_ctx->region_type == ORT_ACC_PARALLEL) { /* Remove firstprivate and make it a copy map. */ n->value &= ~GOVD_FIRSTPRIVATE; n->value |= GOVD_MAP; } } else if (outer_ctx->region_type == ORT_ACC_PARALLEL) { splay_tree_insert (outer_ctx->variables, (splay_tree_key)decl, GOVD_MAP | GOVD_SEEN); break; } outer_ctx = outer_ctx->outer_context; } } } /* Notice a threadprivate variable DECL used in OMP context CTX. This just prints out diagnostics about threadprivate variable uses in untied tasks. If DECL2 is non-NULL, prevent this warning on that variable. */ static bool omp_notice_threadprivate_variable (struct gimplify_omp_ctx *ctx, tree decl, tree decl2) { splay_tree_node n; struct gimplify_omp_ctx *octx; for (octx = ctx; octx; octx = octx->outer_context) if ((octx->region_type & ORT_TARGET) != 0 || octx->order_concurrent) { n = splay_tree_lookup (octx->variables, (splay_tree_key)decl); if (n == NULL) { if (octx->order_concurrent) { error ("threadprivate variable %qE used in a region with" " % clause", DECL_NAME (decl)); inform (octx->location, "enclosing region"); } else { error ("threadprivate variable %qE used in target region", DECL_NAME (decl)); inform (octx->location, "enclosing target region"); } splay_tree_insert (octx->variables, (splay_tree_key)decl, 0); } if (decl2) splay_tree_insert (octx->variables, (splay_tree_key)decl2, 0); } if (ctx->region_type != ORT_UNTIED_TASK) return false; n = splay_tree_lookup (ctx->variables, (splay_tree_key)decl); if (n == NULL) { error ("threadprivate variable %qE used in untied task", DECL_NAME (decl)); inform (ctx->location, "enclosing task"); splay_tree_insert (ctx->variables, (splay_tree_key)decl, 0); } if (decl2) splay_tree_insert (ctx->variables, (splay_tree_key)decl2, 0); return false; } /* Return true if global var DECL is device resident. */ static bool device_resident_p (tree decl) { tree attr = lookup_attribute ("oacc declare target", DECL_ATTRIBUTES (decl)); if (!attr) return false; for (tree t = TREE_VALUE (attr); t; t = TREE_PURPOSE (t)) { tree c = TREE_VALUE (t); if (OMP_CLAUSE_MAP_KIND (c) == GOMP_MAP_DEVICE_RESIDENT) return true; } return false; } /* Return true if DECL has an ACC DECLARE attribute. */ static bool is_oacc_declared (tree decl) { tree t = TREE_CODE (decl) == MEM_REF ? TREE_OPERAND (decl, 0) : decl; tree declared = lookup_attribute ("oacc declare target", DECL_ATTRIBUTES (t)); return declared != NULL_TREE; } /* Determine outer default flags for DECL mentioned in an OMP region but not declared in an enclosing clause. ??? Some compiler-generated variables (like SAVE_EXPRs) could be remapped firstprivate instead of shared. To some extent this is addressed in omp_firstprivatize_type_sizes, but not effectively. */ static unsigned omp_default_clause (struct gimplify_omp_ctx *ctx, tree decl, bool in_code, unsigned flags) { enum omp_clause_default_kind default_kind = ctx->default_kind; enum omp_clause_default_kind kind; kind = lang_hooks.decls.omp_predetermined_sharing (decl); if (ctx->region_type & ORT_TASK) { tree detach_clause = omp_find_clause (ctx->clauses, OMP_CLAUSE_DETACH); /* The event-handle specified by a detach clause should always be firstprivate, regardless of the current default. */ if (detach_clause && OMP_CLAUSE_DECL (detach_clause) == decl) kind = OMP_CLAUSE_DEFAULT_FIRSTPRIVATE; } if (kind != OMP_CLAUSE_DEFAULT_UNSPECIFIED) default_kind = kind; else if (VAR_P (decl) && TREE_STATIC (decl) && DECL_IN_CONSTANT_POOL (decl)) default_kind = OMP_CLAUSE_DEFAULT_SHARED; /* For C/C++ default({,first}private), variables with static storage duration declared in a namespace or global scope and referenced in construct must be explicitly specified, i.e. acts as default(none). */ else if ((default_kind == OMP_CLAUSE_DEFAULT_PRIVATE || default_kind == OMP_CLAUSE_DEFAULT_FIRSTPRIVATE) && VAR_P (decl) && is_global_var (decl) && (DECL_FILE_SCOPE_P (decl) || (DECL_CONTEXT (decl) && TREE_CODE (DECL_CONTEXT (decl)) == NAMESPACE_DECL)) && !lang_GNU_Fortran ()) default_kind = OMP_CLAUSE_DEFAULT_NONE; switch (default_kind) { case OMP_CLAUSE_DEFAULT_NONE: { const char *rtype; if (ctx->region_type & ORT_PARALLEL) rtype = "parallel"; else if ((ctx->region_type & ORT_TASKLOOP) == ORT_TASKLOOP) rtype = "taskloop"; else if (ctx->region_type & ORT_TASK) rtype = "task"; else if (ctx->region_type & ORT_TEAMS) rtype = "teams"; else gcc_unreachable (); error ("%qE not specified in enclosing %qs", DECL_NAME (lang_hooks.decls.omp_report_decl (decl)), rtype); inform (ctx->location, "enclosing %qs", rtype); } /* FALLTHRU */ case OMP_CLAUSE_DEFAULT_SHARED: flags |= GOVD_SHARED; break; case OMP_CLAUSE_DEFAULT_PRIVATE: flags |= GOVD_PRIVATE; break; case OMP_CLAUSE_DEFAULT_FIRSTPRIVATE: flags |= GOVD_FIRSTPRIVATE; break; case OMP_CLAUSE_DEFAULT_UNSPECIFIED: /* decl will be either GOVD_FIRSTPRIVATE or GOVD_SHARED. */ gcc_assert ((ctx->region_type & ORT_TASK) != 0); if (struct gimplify_omp_ctx *octx = ctx->outer_context) { omp_notice_variable (octx, decl, in_code); for (; octx; octx = octx->outer_context) { splay_tree_node n2; n2 = splay_tree_lookup (octx->variables, (splay_tree_key) decl); if ((octx->region_type & (ORT_TARGET_DATA | ORT_TARGET)) != 0 && (n2 == NULL || (n2->value & GOVD_DATA_SHARE_CLASS) == 0)) continue; if (n2 && (n2->value & GOVD_DATA_SHARE_CLASS) != GOVD_SHARED) { flags |= GOVD_FIRSTPRIVATE; goto found_outer; } if ((octx->region_type & (ORT_PARALLEL | ORT_TEAMS)) != 0) { flags |= GOVD_SHARED; goto found_outer; } } } if (TREE_CODE (decl) == PARM_DECL || (!is_global_var (decl) && DECL_CONTEXT (decl) == current_function_decl)) flags |= GOVD_FIRSTPRIVATE; else flags |= GOVD_SHARED; found_outer: break; default: gcc_unreachable (); } return flags; } /* Determine outer default flags for DECL mentioned in an OACC region but not declared in an enclosing clause. */ static unsigned oacc_default_clause (struct gimplify_omp_ctx *ctx, tree decl, unsigned flags) { const char *rkind; bool on_device = false; bool is_private = false; bool declared = is_oacc_declared (decl); tree type = TREE_TYPE (decl); if (omp_privatize_by_reference (decl)) type = TREE_TYPE (type); /* For Fortran COMMON blocks, only used variables in those blocks are transfered and remapped. The block itself will have a private clause to avoid transfering the data twice. The hook evaluates to false by default. For a variable in Fortran's COMMON or EQUIVALENCE block, returns 'true' (as we have shared=false) - as only the variables in such a COMMON/EQUIVALENCE block shall be privatized not the whole block. For C++ and Fortran, it can also be true under certain other conditions, if DECL_HAS_VALUE_EXPR. */ if (RECORD_OR_UNION_TYPE_P (type)) is_private = lang_hooks.decls.omp_disregard_value_expr (decl, false); if ((ctx->region_type & (ORT_ACC_PARALLEL | ORT_ACC_KERNELS)) != 0 && is_global_var (decl) && device_resident_p (decl) && !is_private) { on_device = true; flags |= GOVD_MAP_TO_ONLY; } switch (ctx->region_type) { case ORT_ACC_KERNELS: rkind = "kernels"; if (is_private) flags |= GOVD_FIRSTPRIVATE; else if (AGGREGATE_TYPE_P (type)) { /* Aggregates default to 'present_or_copy', or 'present'. */ if (ctx->default_kind != OMP_CLAUSE_DEFAULT_PRESENT) flags |= GOVD_MAP; else flags |= GOVD_MAP | GOVD_MAP_FORCE_PRESENT; } else /* Scalars default to 'copy'. */ flags |= GOVD_MAP | GOVD_MAP_FORCE; break; case ORT_ACC_PARALLEL: case ORT_ACC_SERIAL: rkind = ctx->region_type == ORT_ACC_PARALLEL ? "parallel" : "serial"; if (is_private) flags |= GOVD_FIRSTPRIVATE; else if (on_device || declared) flags |= GOVD_MAP; else if (AGGREGATE_TYPE_P (type)) { /* Aggregates default to 'present_or_copy', or 'present'. */ if (ctx->default_kind != OMP_CLAUSE_DEFAULT_PRESENT) flags |= GOVD_MAP; else flags |= GOVD_MAP | GOVD_MAP_FORCE_PRESENT; } else /* Scalars default to 'firstprivate'. */ flags |= GOVD_FIRSTPRIVATE; break; default: gcc_unreachable (); } if (DECL_ARTIFICIAL (decl)) ; /* We can get compiler-generated decls, and should not complain about them. */ else if (ctx->default_kind == OMP_CLAUSE_DEFAULT_NONE) { error ("%qE not specified in enclosing OpenACC %qs construct", DECL_NAME (lang_hooks.decls.omp_report_decl (decl)), rkind); inform (ctx->location, "enclosing OpenACC %qs construct", rkind); } else if (ctx->default_kind == OMP_CLAUSE_DEFAULT_PRESENT) ; /* Handled above. */ else gcc_checking_assert (ctx->default_kind == OMP_CLAUSE_DEFAULT_SHARED); return flags; } /* Record the fact that DECL was used within the OMP context CTX. IN_CODE is true when real code uses DECL, and false when we should merely emit default(none) errors. Return true if DECL is going to be remapped and thus DECL shouldn't be gimplified into its DECL_VALUE_EXPR (if any). */ static bool omp_notice_variable (struct gimplify_omp_ctx *ctx, tree decl, bool in_code) { splay_tree_node n; unsigned flags = in_code ? GOVD_SEEN : 0; bool ret = false, shared; if (error_operand_p (decl)) return false; if (ctx->region_type == ORT_NONE) return lang_hooks.decls.omp_disregard_value_expr (decl, false); if (is_global_var (decl)) { /* Threadprivate variables are predetermined. */ if (DECL_THREAD_LOCAL_P (decl)) return omp_notice_threadprivate_variable (ctx, decl, NULL_TREE); if (DECL_HAS_VALUE_EXPR_P (decl)) { if (ctx->region_type & ORT_ACC) /* For OpenACC, defer expansion of value to avoid transfering privatized common block data instead of im-/explicitly transfered variables which are in common blocks. */ ; else { tree value = get_base_address (DECL_VALUE_EXPR (decl)); if (value && DECL_P (value) && DECL_THREAD_LOCAL_P (value)) return omp_notice_threadprivate_variable (ctx, decl, value); } } if (gimplify_omp_ctxp->outer_context == NULL && VAR_P (decl) && oacc_get_fn_attrib (current_function_decl)) { location_t loc = DECL_SOURCE_LOCATION (decl); if (lookup_attribute ("omp declare target link", DECL_ATTRIBUTES (decl))) { error_at (loc, "%qE with % clause used in % function", DECL_NAME (decl)); return false; } else if (!lookup_attribute ("omp declare target", DECL_ATTRIBUTES (decl))) { error_at (loc, "%qE requires a % directive for use " "in a % function", DECL_NAME (decl)); return false; } } } n = splay_tree_lookup (ctx->variables, (splay_tree_key)decl); if ((ctx->region_type & ORT_TARGET) != 0) { if (ctx->region_type & ORT_ACC) /* For OpenACC, as remarked above, defer expansion. */ shared = false; else shared = true; ret = lang_hooks.decls.omp_disregard_value_expr (decl, shared); if (n == NULL) { unsigned nflags = flags; if ((ctx->region_type & ORT_ACC) == 0) { bool is_declare_target = false; if (is_global_var (decl) && varpool_node::get_create (decl)->offloadable) { struct gimplify_omp_ctx *octx; for (octx = ctx->outer_context; octx; octx = octx->outer_context) { n = splay_tree_lookup (octx->variables, (splay_tree_key)decl); if (n && (n->value & GOVD_DATA_SHARE_CLASS) != GOVD_SHARED && (n->value & GOVD_DATA_SHARE_CLASS) != 0) break; } is_declare_target = octx == NULL; } if (!is_declare_target) { int gdmk; enum omp_clause_defaultmap_kind kind; if (lang_hooks.decls.omp_allocatable_p (decl)) gdmk = GDMK_ALLOCATABLE; else if (lang_hooks.decls.omp_scalar_target_p (decl)) gdmk = GDMK_SCALAR_TARGET; else if (lang_hooks.decls.omp_scalar_p (decl, false)) gdmk = GDMK_SCALAR; else if (TREE_CODE (TREE_TYPE (decl)) == POINTER_TYPE || (TREE_CODE (TREE_TYPE (decl)) == REFERENCE_TYPE && (TREE_CODE (TREE_TYPE (TREE_TYPE (decl))) == POINTER_TYPE))) gdmk = GDMK_POINTER; else gdmk = GDMK_AGGREGATE; kind = lang_hooks.decls.omp_predetermined_mapping (decl); if (kind != OMP_CLAUSE_DEFAULTMAP_CATEGORY_UNSPECIFIED) { if (kind == OMP_CLAUSE_DEFAULTMAP_FIRSTPRIVATE) nflags |= GOVD_FIRSTPRIVATE; else if (kind == OMP_CLAUSE_DEFAULTMAP_TO) nflags |= GOVD_MAP | GOVD_MAP_TO_ONLY; else gcc_unreachable (); } else if (ctx->defaultmap[gdmk] == 0) { tree d = lang_hooks.decls.omp_report_decl (decl); error ("%qE not specified in enclosing %", DECL_NAME (d)); inform (ctx->location, "enclosing %"); } else if (ctx->defaultmap[gdmk] & (GOVD_MAP_0LEN_ARRAY | GOVD_FIRSTPRIVATE)) nflags |= ctx->defaultmap[gdmk]; else { gcc_assert (ctx->defaultmap[gdmk] & GOVD_MAP); nflags |= ctx->defaultmap[gdmk] & ~GOVD_MAP; } } } struct gimplify_omp_ctx *octx = ctx->outer_context; if ((ctx->region_type & ORT_ACC) && octx) { /* Look in outer OpenACC contexts, to see if there's a data attribute for this variable. */ omp_notice_variable (octx, decl, in_code); for (; octx; octx = octx->outer_context) { if (!(octx->region_type & (ORT_TARGET_DATA | ORT_TARGET))) break; splay_tree_node n2 = splay_tree_lookup (octx->variables, (splay_tree_key) decl); if (n2) { if (octx->region_type == ORT_ACC_HOST_DATA) error ("variable %qE declared in enclosing " "% region", DECL_NAME (decl)); nflags |= GOVD_MAP; if (octx->region_type == ORT_ACC_DATA && (n2->value & GOVD_MAP_0LEN_ARRAY)) nflags |= GOVD_MAP_0LEN_ARRAY; goto found_outer; } } } if ((nflags & ~(GOVD_MAP_TO_ONLY | GOVD_MAP_FROM_ONLY | GOVD_MAP_ALLOC_ONLY)) == flags) { tree type = TREE_TYPE (decl); if (gimplify_omp_ctxp->target_firstprivatize_array_bases && omp_privatize_by_reference (decl)) type = TREE_TYPE (type); if (!lang_hooks.types.omp_mappable_type (type)) { error ("%qD referenced in target region does not have " "a mappable type", decl); nflags |= GOVD_MAP | GOVD_EXPLICIT; } else { if ((ctx->region_type & ORT_ACC) != 0) nflags = oacc_default_clause (ctx, decl, flags); else nflags |= GOVD_MAP; } } found_outer: omp_add_variable (ctx, decl, nflags); } else { /* If nothing changed, there's nothing left to do. */ if ((n->value & flags) == flags) return ret; flags |= n->value; n->value = flags; } goto do_outer; } if (n == NULL) { if (ctx->region_type == ORT_WORKSHARE || ctx->region_type == ORT_TASKGROUP || ctx->region_type == ORT_SIMD || ctx->region_type == ORT_ACC || (ctx->region_type & ORT_TARGET_DATA) != 0) goto do_outer; flags = omp_default_clause (ctx, decl, in_code, flags); if ((flags & GOVD_PRIVATE) && lang_hooks.decls.omp_private_outer_ref (decl)) flags |= GOVD_PRIVATE_OUTER_REF; omp_add_variable (ctx, decl, flags); shared = (flags & GOVD_SHARED) != 0; ret = lang_hooks.decls.omp_disregard_value_expr (decl, shared); goto do_outer; } /* Don't mark as GOVD_SEEN addressable temporaries seen only in simd lb, b or incr expressions, those shouldn't be turned into simd arrays. */ if (ctx->region_type == ORT_SIMD && ctx->in_for_exprs && ((n->value & (GOVD_PRIVATE | GOVD_SEEN | GOVD_EXPLICIT)) == GOVD_PRIVATE)) flags &= ~GOVD_SEEN; if ((n->value & (GOVD_SEEN | GOVD_LOCAL)) == 0 && (flags & (GOVD_SEEN | GOVD_LOCAL)) == GOVD_SEEN && DECL_SIZE (decl)) { if (TREE_CODE (DECL_SIZE (decl)) != INTEGER_CST) { splay_tree_node n2; tree t = DECL_VALUE_EXPR (decl); gcc_assert (TREE_CODE (t) == INDIRECT_REF); t = TREE_OPERAND (t, 0); gcc_assert (DECL_P (t)); n2 = splay_tree_lookup (ctx->variables, (splay_tree_key) t); n2->value |= GOVD_SEEN; } else if (omp_privatize_by_reference (decl) && TYPE_SIZE_UNIT (TREE_TYPE (TREE_TYPE (decl))) && (TREE_CODE (TYPE_SIZE_UNIT (TREE_TYPE (TREE_TYPE (decl)))) != INTEGER_CST)) { splay_tree_node n2; tree t = TYPE_SIZE_UNIT (TREE_TYPE (TREE_TYPE (decl))); gcc_assert (DECL_P (t)); n2 = splay_tree_lookup (ctx->variables, (splay_tree_key) t); if (n2) omp_notice_variable (ctx, t, true); } } if (ctx->region_type & ORT_ACC) /* For OpenACC, as remarked above, defer expansion. */ shared = false; else shared = ((flags | n->value) & GOVD_SHARED) != 0; ret = lang_hooks.decls.omp_disregard_value_expr (decl, shared); /* If nothing changed, there's nothing left to do. */ if ((n->value & flags) == flags) return ret; flags |= n->value; n->value = flags; do_outer: /* If the variable is private in the current context, then we don't need to propagate anything to an outer context. */ if ((flags & GOVD_PRIVATE) && !(flags & GOVD_PRIVATE_OUTER_REF)) return ret; if ((flags & (GOVD_LINEAR | GOVD_LINEAR_LASTPRIVATE_NO_OUTER)) == (GOVD_LINEAR | GOVD_LINEAR_LASTPRIVATE_NO_OUTER)) return ret; if ((flags & (GOVD_FIRSTPRIVATE | GOVD_LASTPRIVATE | GOVD_LINEAR_LASTPRIVATE_NO_OUTER)) == (GOVD_LASTPRIVATE | GOVD_LINEAR_LASTPRIVATE_NO_OUTER)) return ret; if (ctx->outer_context && omp_notice_variable (ctx->outer_context, decl, in_code)) return true; return ret; } /* Verify that DECL is private within CTX. If there's specific information to the contrary in the innermost scope, generate an error. */ static bool omp_is_private (struct gimplify_omp_ctx *ctx, tree decl, int simd) { splay_tree_node n; n = splay_tree_lookup (ctx->variables, (splay_tree_key)decl); if (n != NULL) { if (n->value & GOVD_SHARED) { if (ctx == gimplify_omp_ctxp) { if (simd) error ("iteration variable %qE is predetermined linear", DECL_NAME (decl)); else error ("iteration variable %qE should be private", DECL_NAME (decl)); n->value = GOVD_PRIVATE; return true; } else return false; } else if ((n->value & GOVD_EXPLICIT) != 0 && (ctx == gimplify_omp_ctxp || (ctx->region_type == ORT_COMBINED_PARALLEL && gimplify_omp_ctxp->outer_context == ctx))) { if ((n->value & GOVD_FIRSTPRIVATE) != 0) error ("iteration variable %qE should not be firstprivate", DECL_NAME (decl)); else if ((n->value & GOVD_REDUCTION) != 0) error ("iteration variable %qE should not be reduction", DECL_NAME (decl)); else if (simd != 1 && (n->value & GOVD_LINEAR) != 0) error ("iteration variable %qE should not be linear", DECL_NAME (decl)); } return (ctx == gimplify_omp_ctxp || (ctx->region_type == ORT_COMBINED_PARALLEL && gimplify_omp_ctxp->outer_context == ctx)); } if (ctx->region_type != ORT_WORKSHARE && ctx->region_type != ORT_TASKGROUP && ctx->region_type != ORT_SIMD && ctx->region_type != ORT_ACC) return false; else if (ctx->outer_context) return omp_is_private (ctx->outer_context, decl, simd); return false; } /* Return true if DECL is private within a parallel region that binds to the current construct's context or in parallel region's REDUCTION clause. */ static bool omp_check_private (struct gimplify_omp_ctx *ctx, tree decl, bool copyprivate) { splay_tree_node n; do { ctx = ctx->outer_context; if (ctx == NULL) { if (is_global_var (decl)) return false; /* References might be private, but might be shared too, when checking for copyprivate, assume they might be private, otherwise assume they might be shared. */ if (copyprivate) return true; if (omp_privatize_by_reference (decl)) return false; /* Treat C++ privatized non-static data members outside of the privatization the same. */ if (omp_member_access_dummy_var (decl)) return false; return true; } n = splay_tree_lookup (ctx->variables, (splay_tree_key) decl); if ((ctx->region_type & (ORT_TARGET | ORT_TARGET_DATA)) != 0 && (n == NULL || (n->value & GOVD_DATA_SHARE_CLASS) == 0)) { if ((ctx->region_type & ORT_TARGET_DATA) != 0 || n == NULL || (n->value & GOVD_MAP) == 0) continue; return false; } if (n != NULL) { if ((n->value & GOVD_LOCAL) != 0 && omp_member_access_dummy_var (decl)) return false; return (n->value & GOVD_SHARED) == 0; } if (ctx->region_type == ORT_WORKSHARE || ctx->region_type == ORT_TASKGROUP || ctx->region_type == ORT_SIMD || ctx->region_type == ORT_ACC) continue; break; } while (1); return false; } /* Callback for walk_tree to find a DECL_EXPR for the given DECL. */ static tree find_decl_expr (tree *tp, int *walk_subtrees, void *data) { tree t = *tp; /* If this node has been visited, unmark it and keep looking. */ if (TREE_CODE (t) == DECL_EXPR && DECL_EXPR_DECL (t) == (tree) data) return t; if (IS_TYPE_OR_DECL_P (t)) *walk_subtrees = 0; return NULL_TREE; } /* Gimplify the affinity clause but effectively ignore it. Generate: var = begin; if ((step > 1) ? var <= end : var > end) locatator_var_expr; */ static void gimplify_omp_affinity (tree *list_p, gimple_seq *pre_p) { tree last_iter = NULL_TREE; tree last_bind = NULL_TREE; tree label = NULL_TREE; tree *last_body = NULL; for (tree c = *list_p; c; c = OMP_CLAUSE_CHAIN (c)) if (OMP_CLAUSE_CODE (c) == OMP_CLAUSE_AFFINITY) { tree t = OMP_CLAUSE_DECL (c); if (TREE_CODE (t) == TREE_LIST && TREE_PURPOSE (t) && TREE_CODE (TREE_PURPOSE (t)) == TREE_VEC) { if (TREE_VALUE (t) == null_pointer_node) continue; if (TREE_PURPOSE (t) != last_iter) { if (last_bind) { append_to_statement_list (label, last_body); gimplify_and_add (last_bind, pre_p); last_bind = NULL_TREE; } for (tree it = TREE_PURPOSE (t); it; it = TREE_CHAIN (it)) { if (gimplify_expr (&TREE_VEC_ELT (it, 1), pre_p, NULL, is_gimple_val, fb_rvalue) == GS_ERROR || gimplify_expr (&TREE_VEC_ELT (it, 2), pre_p, NULL, is_gimple_val, fb_rvalue) == GS_ERROR || gimplify_expr (&TREE_VEC_ELT (it, 3), pre_p, NULL, is_gimple_val, fb_rvalue) == GS_ERROR || (gimplify_expr (&TREE_VEC_ELT (it, 4), pre_p, NULL, is_gimple_val, fb_rvalue) == GS_ERROR)) return; } last_iter = TREE_PURPOSE (t); tree block = TREE_VEC_ELT (TREE_PURPOSE (t), 5); last_bind = build3 (BIND_EXPR, void_type_node, BLOCK_VARS (block), NULL, block); last_body = &BIND_EXPR_BODY (last_bind); tree cond = NULL_TREE; location_t loc = OMP_CLAUSE_LOCATION (c); for (tree it = TREE_PURPOSE (t); it; it = TREE_CHAIN (it)) { tree var = TREE_VEC_ELT (it, 0); tree begin = TREE_VEC_ELT (it, 1); tree end = TREE_VEC_ELT (it, 2); tree step = TREE_VEC_ELT (it, 3); loc = DECL_SOURCE_LOCATION (var); tree tem = build2_loc (loc, MODIFY_EXPR, void_type_node, var, begin); append_to_statement_list_force (tem, last_body); tree cond1 = fold_build2_loc (loc, GT_EXPR, boolean_type_node, step, build_zero_cst (TREE_TYPE (step))); tree cond2 = fold_build2_loc (loc, LE_EXPR, boolean_type_node, var, end); tree cond3 = fold_build2_loc (loc, GT_EXPR, boolean_type_node, var, end); cond1 = fold_build3_loc (loc, COND_EXPR, boolean_type_node, cond1, cond2, cond3); if (cond) cond = fold_build2_loc (loc, TRUTH_AND_EXPR, boolean_type_node, cond, cond1); else cond = cond1; } tree cont_label = create_artificial_label (loc); label = build1 (LABEL_EXPR, void_type_node, cont_label); tree tem = fold_build3_loc (loc, COND_EXPR, void_type_node, cond, void_node, build_and_jump (&cont_label)); append_to_statement_list_force (tem, last_body); } if (TREE_CODE (TREE_VALUE (t)) == COMPOUND_EXPR) { append_to_statement_list (TREE_OPERAND (TREE_VALUE (t), 0), last_body); TREE_VALUE (t) = TREE_OPERAND (TREE_VALUE (t), 1); } if (error_operand_p (TREE_VALUE (t))) return; append_to_statement_list_force (TREE_VALUE (t), last_body); TREE_VALUE (t) = null_pointer_node; } else { if (last_bind) { append_to_statement_list (label, last_body); gimplify_and_add (last_bind, pre_p); last_bind = NULL_TREE; } if (TREE_CODE (OMP_CLAUSE_DECL (c)) == COMPOUND_EXPR) { gimplify_expr (&TREE_OPERAND (OMP_CLAUSE_DECL (c), 0), pre_p, NULL, is_gimple_val, fb_rvalue); OMP_CLAUSE_DECL (c) = TREE_OPERAND (OMP_CLAUSE_DECL (c), 1); } if (error_operand_p (OMP_CLAUSE_DECL (c))) return; if (gimplify_expr (&OMP_CLAUSE_DECL (c), pre_p, NULL, is_gimple_lvalue, fb_lvalue) == GS_ERROR) return; gimplify_and_add (OMP_CLAUSE_DECL (c), pre_p); } } if (last_bind) { append_to_statement_list (label, last_body); gimplify_and_add (last_bind, pre_p); } return; } /* If *LIST_P contains any OpenMP depend clauses with iterators, lower all the depend clauses by populating corresponding depend array. Returns 0 if there are no such depend clauses, or 2 if all depend clauses should be removed, 1 otherwise. */ static int gimplify_omp_depend (tree *list_p, gimple_seq *pre_p) { tree c; gimple *g; size_t n[4] = { 0, 0, 0, 0 }; bool unused[4]; tree counts[4] = { NULL_TREE, NULL_TREE, NULL_TREE, NULL_TREE }; tree last_iter = NULL_TREE, last_count = NULL_TREE; size_t i, j; location_t first_loc = UNKNOWN_LOCATION; for (c = *list_p; c; c = OMP_CLAUSE_CHAIN (c)) if (OMP_CLAUSE_CODE (c) == OMP_CLAUSE_DEPEND) { switch (OMP_CLAUSE_DEPEND_KIND (c)) { case OMP_CLAUSE_DEPEND_IN: i = 2; break; case OMP_CLAUSE_DEPEND_OUT: case OMP_CLAUSE_DEPEND_INOUT: i = 0; break; case OMP_CLAUSE_DEPEND_MUTEXINOUTSET: i = 1; break; case OMP_CLAUSE_DEPEND_DEPOBJ: i = 3; break; case OMP_CLAUSE_DEPEND_SOURCE: case OMP_CLAUSE_DEPEND_SINK: continue; default: gcc_unreachable (); } tree t = OMP_CLAUSE_DECL (c); if (first_loc == UNKNOWN_LOCATION) first_loc = OMP_CLAUSE_LOCATION (c); if (TREE_CODE (t) == TREE_LIST && TREE_PURPOSE (t) && TREE_CODE (TREE_PURPOSE (t)) == TREE_VEC) { if (TREE_PURPOSE (t) != last_iter) { tree tcnt = size_one_node; for (tree it = TREE_PURPOSE (t); it; it = TREE_CHAIN (it)) { if (gimplify_expr (&TREE_VEC_ELT (it, 1), pre_p, NULL, is_gimple_val, fb_rvalue) == GS_ERROR || gimplify_expr (&TREE_VEC_ELT (it, 2), pre_p, NULL, is_gimple_val, fb_rvalue) == GS_ERROR || gimplify_expr (&TREE_VEC_ELT (it, 3), pre_p, NULL, is_gimple_val, fb_rvalue) == GS_ERROR || (gimplify_expr (&TREE_VEC_ELT (it, 4), pre_p, NULL, is_gimple_val, fb_rvalue) == GS_ERROR)) return 2; tree var = TREE_VEC_ELT (it, 0); tree begin = TREE_VEC_ELT (it, 1); tree end = TREE_VEC_ELT (it, 2); tree step = TREE_VEC_ELT (it, 3); tree orig_step = TREE_VEC_ELT (it, 4); tree type = TREE_TYPE (var); tree stype = TREE_TYPE (step); location_t loc = DECL_SOURCE_LOCATION (var); tree endmbegin; /* Compute count for this iterator as orig_step > 0 ? (begin < end ? (end - begin + (step - 1)) / step : 0) : (begin > end ? (end - begin + (step + 1)) / step : 0) and compute product of those for the entire depend clause. */ if (POINTER_TYPE_P (type)) endmbegin = fold_build2_loc (loc, POINTER_DIFF_EXPR, stype, end, begin); else endmbegin = fold_build2_loc (loc, MINUS_EXPR, type, end, begin); tree stepm1 = fold_build2_loc (loc, MINUS_EXPR, stype, step, build_int_cst (stype, 1)); tree stepp1 = fold_build2_loc (loc, PLUS_EXPR, stype, step, build_int_cst (stype, 1)); tree pos = fold_build2_loc (loc, PLUS_EXPR, stype, unshare_expr (endmbegin), stepm1); pos = fold_build2_loc (loc, TRUNC_DIV_EXPR, stype, pos, step); tree neg = fold_build2_loc (loc, PLUS_EXPR, stype, endmbegin, stepp1); if (TYPE_UNSIGNED (stype)) { neg = fold_build1_loc (loc, NEGATE_EXPR, stype, neg); step = fold_build1_loc (loc, NEGATE_EXPR, stype, step); } neg = fold_build2_loc (loc, TRUNC_DIV_EXPR, stype, neg, step); step = NULL_TREE; tree cond = fold_build2_loc (loc, LT_EXPR, boolean_type_node, begin, end); pos = fold_build3_loc (loc, COND_EXPR, stype, cond, pos, build_int_cst (stype, 0)); cond = fold_build2_loc (loc, LT_EXPR, boolean_type_node, end, begin); neg = fold_build3_loc (loc, COND_EXPR, stype, cond, neg, build_int_cst (stype, 0)); tree osteptype = TREE_TYPE (orig_step); cond = fold_build2_loc (loc, GT_EXPR, boolean_type_node, orig_step, build_int_cst (osteptype, 0)); tree cnt = fold_build3_loc (loc, COND_EXPR, stype, cond, pos, neg); cnt = fold_convert_loc (loc, sizetype, cnt); if (gimplify_expr (&cnt, pre_p, NULL, is_gimple_val, fb_rvalue) == GS_ERROR) return 2; tcnt = size_binop_loc (loc, MULT_EXPR, tcnt, cnt); } if (gimplify_expr (&tcnt, pre_p, NULL, is_gimple_val, fb_rvalue) == GS_ERROR) return 2; last_iter = TREE_PURPOSE (t); last_count = tcnt; } if (counts[i] == NULL_TREE) counts[i] = last_count; else counts[i] = size_binop_loc (OMP_CLAUSE_LOCATION (c), PLUS_EXPR, counts[i], last_count); } else n[i]++; } for (i = 0; i < 4; i++) if (counts[i]) break; if (i == 4) return 0; tree total = size_zero_node; for (i = 0; i < 4; i++) { unused[i] = counts[i] == NULL_TREE && n[i] == 0; if (counts[i] == NULL_TREE) counts[i] = size_zero_node; if (n[i]) counts[i] = size_binop (PLUS_EXPR, counts[i], size_int (n[i])); if (gimplify_expr (&counts[i], pre_p, NULL, is_gimple_val, fb_rvalue) == GS_ERROR) return 2; total = size_binop (PLUS_EXPR, total, counts[i]); } if (gimplify_expr (&total, pre_p, NULL, is_gimple_val, fb_rvalue) == GS_ERROR) return 2; bool is_old = unused[1] && unused[3]; tree totalpx = size_binop (PLUS_EXPR, unshare_expr (total), size_int (is_old ? 1 : 4)); tree type = build_array_type (ptr_type_node, build_index_type (totalpx)); tree array = create_tmp_var_raw (type); TREE_ADDRESSABLE (array) = 1; if (!poly_int_tree_p (totalpx)) { if (!TYPE_SIZES_GIMPLIFIED (TREE_TYPE (array))) gimplify_type_sizes (TREE_TYPE (array), pre_p); if (gimplify_omp_ctxp) { struct gimplify_omp_ctx *ctx = gimplify_omp_ctxp; while (ctx && (ctx->region_type == ORT_WORKSHARE || ctx->region_type == ORT_TASKGROUP || ctx->region_type == ORT_SIMD || ctx->region_type == ORT_ACC)) ctx = ctx->outer_context; if (ctx) omp_add_variable (ctx, array, GOVD_LOCAL | GOVD_SEEN); } gimplify_vla_decl (array, pre_p); } else gimple_add_tmp_var (array); tree r = build4 (ARRAY_REF, ptr_type_node, array, size_int (0), NULL_TREE, NULL_TREE); tree tem; if (!is_old) { tem = build2 (MODIFY_EXPR, void_type_node, r, build_int_cst (ptr_type_node, 0)); gimplify_and_add (tem, pre_p); r = build4 (ARRAY_REF, ptr_type_node, array, size_int (1), NULL_TREE, NULL_TREE); } tem = build2 (MODIFY_EXPR, void_type_node, r, fold_convert (ptr_type_node, total)); gimplify_and_add (tem, pre_p); for (i = 1; i < (is_old ? 2 : 4); i++) { r = build4 (ARRAY_REF, ptr_type_node, array, size_int (i + !is_old), NULL_TREE, NULL_TREE); tem = build2 (MODIFY_EXPR, void_type_node, r, counts[i - 1]); gimplify_and_add (tem, pre_p); } tree cnts[4]; for (j = 4; j; j--) if (!unused[j - 1]) break; for (i = 0; i < 4; i++) { if (i && (i >= j || unused[i - 1])) { cnts[i] = cnts[i - 1]; continue; } cnts[i] = create_tmp_var (sizetype); if (i == 0) g = gimple_build_assign (cnts[i], size_int (is_old ? 2 : 5)); else { tree t; if (is_old) t = size_binop (PLUS_EXPR, counts[0], size_int (2)); else t = size_binop (PLUS_EXPR, cnts[i - 1], counts[i - 1]); if (gimplify_expr (&t, pre_p, NULL, is_gimple_val, fb_rvalue) == GS_ERROR) return 2; g = gimple_build_assign (cnts[i], t); } gimple_seq_add_stmt (pre_p, g); } last_iter = NULL_TREE; tree last_bind = NULL_TREE; tree *last_body = NULL; for (c = *list_p; c; c = OMP_CLAUSE_CHAIN (c)) if (OMP_CLAUSE_CODE (c) == OMP_CLAUSE_DEPEND) { switch (OMP_CLAUSE_DEPEND_KIND (c)) { case OMP_CLAUSE_DEPEND_IN: i = 2; break; case OMP_CLAUSE_DEPEND_OUT: case OMP_CLAUSE_DEPEND_INOUT: i = 0; break; case OMP_CLAUSE_DEPEND_MUTEXINOUTSET: i = 1; break; case OMP_CLAUSE_DEPEND_DEPOBJ: i = 3; break; case OMP_CLAUSE_DEPEND_SOURCE: case OMP_CLAUSE_DEPEND_SINK: continue; default: gcc_unreachable (); } tree t = OMP_CLAUSE_DECL (c); if (TREE_CODE (t) == TREE_LIST && TREE_PURPOSE (t) && TREE_CODE (TREE_PURPOSE (t)) == TREE_VEC) { if (TREE_PURPOSE (t) != last_iter) { if (last_bind) gimplify_and_add (last_bind, pre_p); tree block = TREE_VEC_ELT (TREE_PURPOSE (t), 5); last_bind = build3 (BIND_EXPR, void_type_node, BLOCK_VARS (block), NULL, block); TREE_SIDE_EFFECTS (last_bind) = 1; SET_EXPR_LOCATION (last_bind, OMP_CLAUSE_LOCATION (c)); tree *p = &BIND_EXPR_BODY (last_bind); for (tree it = TREE_PURPOSE (t); it; it = TREE_CHAIN (it)) { tree var = TREE_VEC_ELT (it, 0); tree begin = TREE_VEC_ELT (it, 1); tree end = TREE_VEC_ELT (it, 2); tree step = TREE_VEC_ELT (it, 3); tree orig_step = TREE_VEC_ELT (it, 4); tree type = TREE_TYPE (var); location_t loc = DECL_SOURCE_LOCATION (var); /* Emit: var = begin; goto cond_label; beg_label: ... var = var + step; cond_label: if (orig_step > 0) { if (var < end) goto beg_label; } else { if (var > end) goto beg_label; } for each iterator, with inner iterators added to the ... above. */ tree beg_label = create_artificial_label (loc); tree cond_label = NULL_TREE; tem = build2_loc (loc, MODIFY_EXPR, void_type_node, var, begin); append_to_statement_list_force (tem, p); tem = build_and_jump (&cond_label); append_to_statement_list_force (tem, p); tem = build1 (LABEL_EXPR, void_type_node, beg_label); append_to_statement_list (tem, p); tree bind = build3 (BIND_EXPR, void_type_node, NULL_TREE, NULL_TREE, NULL_TREE); TREE_SIDE_EFFECTS (bind) = 1; SET_EXPR_LOCATION (bind, loc); append_to_statement_list_force (bind, p); if (POINTER_TYPE_P (type)) tem = build2_loc (loc, POINTER_PLUS_EXPR, type, var, fold_convert_loc (loc, sizetype, step)); else tem = build2_loc (loc, PLUS_EXPR, type, var, step); tem = build2_loc (loc, MODIFY_EXPR, void_type_node, var, tem); append_to_statement_list_force (tem, p); tem = build1 (LABEL_EXPR, void_type_node, cond_label); append_to_statement_list (tem, p); tree cond = fold_build2_loc (loc, LT_EXPR, boolean_type_node, var, end); tree pos = fold_build3_loc (loc, COND_EXPR, void_type_node, cond, build_and_jump (&beg_label), void_node); cond = fold_build2_loc (loc, GT_EXPR, boolean_type_node, var, end); tree neg = fold_build3_loc (loc, COND_EXPR, void_type_node, cond, build_and_jump (&beg_label), void_node); tree osteptype = TREE_TYPE (orig_step); cond = fold_build2_loc (loc, GT_EXPR, boolean_type_node, orig_step, build_int_cst (osteptype, 0)); tem = fold_build3_loc (loc, COND_EXPR, void_type_node, cond, pos, neg); append_to_statement_list_force (tem, p); p = &BIND_EXPR_BODY (bind); } last_body = p; } last_iter = TREE_PURPOSE (t); if (TREE_CODE (TREE_VALUE (t)) == COMPOUND_EXPR) { append_to_statement_list (TREE_OPERAND (TREE_VALUE (t), 0), last_body); TREE_VALUE (t) = TREE_OPERAND (TREE_VALUE (t), 1); } if (error_operand_p (TREE_VALUE (t))) return 2; TREE_VALUE (t) = build_fold_addr_expr (TREE_VALUE (t)); r = build4 (ARRAY_REF, ptr_type_node, array, cnts[i], NULL_TREE, NULL_TREE); tem = build2_loc (OMP_CLAUSE_LOCATION (c), MODIFY_EXPR, void_type_node, r, TREE_VALUE (t)); append_to_statement_list_force (tem, last_body); tem = build2_loc (OMP_CLAUSE_LOCATION (c), MODIFY_EXPR, void_type_node, cnts[i], size_binop (PLUS_EXPR, cnts[i], size_int (1))); append_to_statement_list_force (tem, last_body); TREE_VALUE (t) = null_pointer_node; } else { if (last_bind) { gimplify_and_add (last_bind, pre_p); last_bind = NULL_TREE; } if (TREE_CODE (OMP_CLAUSE_DECL (c)) == COMPOUND_EXPR) { gimplify_expr (&TREE_OPERAND (OMP_CLAUSE_DECL (c), 0), pre_p, NULL, is_gimple_val, fb_rvalue); OMP_CLAUSE_DECL (c) = TREE_OPERAND (OMP_CLAUSE_DECL (c), 1); } if (error_operand_p (OMP_CLAUSE_DECL (c))) return 2; OMP_CLAUSE_DECL (c) = build_fold_addr_expr (OMP_CLAUSE_DECL (c)); if (gimplify_expr (&OMP_CLAUSE_DECL (c), pre_p, NULL, is_gimple_val, fb_rvalue) == GS_ERROR) return 2; r = build4 (ARRAY_REF, ptr_type_node, array, cnts[i], NULL_TREE, NULL_TREE); tem = build2 (MODIFY_EXPR, void_type_node, r, OMP_CLAUSE_DECL (c)); gimplify_and_add (tem, pre_p); g = gimple_build_assign (cnts[i], size_binop (PLUS_EXPR, cnts[i], size_int (1))); gimple_seq_add_stmt (pre_p, g); } } if (last_bind) gimplify_and_add (last_bind, pre_p); tree cond = boolean_false_node; if (is_old) { if (!unused[0]) cond = build2_loc (first_loc, NE_EXPR, boolean_type_node, cnts[0], size_binop_loc (first_loc, PLUS_EXPR, counts[0], size_int (2))); if (!unused[2]) cond = build2_loc (first_loc, TRUTH_OR_EXPR, boolean_type_node, cond, build2_loc (first_loc, NE_EXPR, boolean_type_node, cnts[2], size_binop_loc (first_loc, PLUS_EXPR, totalpx, size_int (1)))); } else { tree prev = size_int (5); for (i = 0; i < 4; i++) { if (unused[i]) continue; prev = size_binop_loc (first_loc, PLUS_EXPR, counts[i], prev); cond = build2_loc (first_loc, TRUTH_OR_EXPR, boolean_type_node, cond, build2_loc (first_loc, NE_EXPR, boolean_type_node, cnts[i], unshare_expr (prev))); } } tem = build3_loc (first_loc, COND_EXPR, void_type_node, cond, build_call_expr_loc (first_loc, builtin_decl_explicit (BUILT_IN_TRAP), 0), void_node); gimplify_and_add (tem, pre_p); c = build_omp_clause (UNKNOWN_LOCATION, OMP_CLAUSE_DEPEND); OMP_CLAUSE_DEPEND_KIND (c) = OMP_CLAUSE_DEPEND_LAST; OMP_CLAUSE_DECL (c) = build_fold_addr_expr (array); OMP_CLAUSE_CHAIN (c) = *list_p; *list_p = c; return 1; } /* Insert a GOMP_MAP_ALLOC or GOMP_MAP_RELEASE node following a GOMP_MAP_STRUCT mapping. C is an always_pointer mapping. STRUCT_NODE is the struct node to insert the new mapping after (when the struct node is initially created). PREV_NODE is the first of two or three mappings for a pointer, and is either: - the node before C, when a pair of mappings is used, e.g. for a C/C++ array section. - not the node before C. This is true when we have a reference-to-pointer type (with a mapping for the reference and for the pointer), or for Fortran derived-type mappings with a GOMP_MAP_TO_PSET. If SCP is non-null, the new node is inserted before *SCP. if SCP is null, the new node is inserted before PREV_NODE. The return type is: - PREV_NODE, if SCP is non-null. - The newly-created ALLOC or RELEASE node, if SCP is null. - The second newly-created ALLOC or RELEASE node, if we are mapping a reference to a pointer. */ static tree insert_struct_comp_map (enum tree_code code, tree c, tree struct_node, tree prev_node, tree *scp) { enum gomp_map_kind mkind = (code == OMP_TARGET_EXIT_DATA || code == OACC_EXIT_DATA) ? GOMP_MAP_RELEASE : GOMP_MAP_ALLOC; tree c2 = build_omp_clause (OMP_CLAUSE_LOCATION (c), OMP_CLAUSE_MAP); tree cl = scp ? prev_node : c2; OMP_CLAUSE_SET_MAP_KIND (c2, mkind); OMP_CLAUSE_DECL (c2) = unshare_expr (OMP_CLAUSE_DECL (c)); OMP_CLAUSE_CHAIN (c2) = scp ? *scp : prev_node; if (OMP_CLAUSE_CHAIN (prev_node) != c && OMP_CLAUSE_CODE (OMP_CLAUSE_CHAIN (prev_node)) == OMP_CLAUSE_MAP && (OMP_CLAUSE_MAP_KIND (OMP_CLAUSE_CHAIN (prev_node)) == GOMP_MAP_TO_PSET)) OMP_CLAUSE_SIZE (c2) = OMP_CLAUSE_SIZE (OMP_CLAUSE_CHAIN (prev_node)); else OMP_CLAUSE_SIZE (c2) = TYPE_SIZE_UNIT (ptr_type_node); if (struct_node) OMP_CLAUSE_CHAIN (struct_node) = c2; /* We might need to create an additional mapping if we have a reference to a pointer (in C++). Don't do this if we have something other than a GOMP_MAP_ALWAYS_POINTER though, i.e. a GOMP_MAP_TO_PSET. */ if (OMP_CLAUSE_CHAIN (prev_node) != c && OMP_CLAUSE_CODE (OMP_CLAUSE_CHAIN (prev_node)) == OMP_CLAUSE_MAP && ((OMP_CLAUSE_MAP_KIND (OMP_CLAUSE_CHAIN (prev_node)) == GOMP_MAP_ALWAYS_POINTER) || (OMP_CLAUSE_MAP_KIND (OMP_CLAUSE_CHAIN (prev_node)) == GOMP_MAP_ATTACH_DETACH))) { tree c4 = OMP_CLAUSE_CHAIN (prev_node); tree c3 = build_omp_clause (OMP_CLAUSE_LOCATION (c), OMP_CLAUSE_MAP); OMP_CLAUSE_SET_MAP_KIND (c3, mkind); OMP_CLAUSE_DECL (c3) = unshare_expr (OMP_CLAUSE_DECL (c4)); OMP_CLAUSE_SIZE (c3) = TYPE_SIZE_UNIT (ptr_type_node); OMP_CLAUSE_CHAIN (c3) = prev_node; if (!scp) OMP_CLAUSE_CHAIN (c2) = c3; else cl = c3; } if (scp) *scp = c2; return cl; } /* Strip ARRAY_REFS or an indirect ref off BASE, find the containing object, and set *BITPOSP and *POFFSETP to the bit offset of the access. If BASE_REF is non-NULL and the containing object is a reference, set *BASE_REF to that reference before dereferencing the object. If BASE_REF is NULL, check that the containing object is a COMPONENT_REF or has array type, else return NULL. */ static tree extract_base_bit_offset (tree base, tree *base_ref, poly_int64 *bitposp, poly_offset_int *poffsetp, tree *offsetp) { tree offset; poly_int64 bitsize, bitpos; machine_mode mode; int unsignedp, reversep, volatilep = 0; poly_offset_int poffset; if (base_ref) { *base_ref = NULL_TREE; while (TREE_CODE (base) == ARRAY_REF) base = TREE_OPERAND (base, 0); if (TREE_CODE (base) == INDIRECT_REF) base = TREE_OPERAND (base, 0); } else { if (TREE_CODE (base) == ARRAY_REF) { while (TREE_CODE (base) == ARRAY_REF) base = TREE_OPERAND (base, 0); if (TREE_CODE (base) != COMPONENT_REF || TREE_CODE (TREE_TYPE (base)) != ARRAY_TYPE) return NULL_TREE; } else if (TREE_CODE (base) == INDIRECT_REF && TREE_CODE (TREE_OPERAND (base, 0)) == COMPONENT_REF && (TREE_CODE (TREE_TYPE (TREE_OPERAND (base, 0))) == REFERENCE_TYPE)) base = TREE_OPERAND (base, 0); } base = get_inner_reference (base, &bitsize, &bitpos, &offset, &mode, &unsignedp, &reversep, &volatilep); tree orig_base = base; if ((TREE_CODE (base) == INDIRECT_REF || (TREE_CODE (base) == MEM_REF && integer_zerop (TREE_OPERAND (base, 1)))) && DECL_P (TREE_OPERAND (base, 0)) && TREE_CODE (TREE_TYPE (TREE_OPERAND (base, 0))) == REFERENCE_TYPE) base = TREE_OPERAND (base, 0); if (offset && poly_int_tree_p (offset)) { poffset = wi::to_poly_offset (offset); offset = NULL_TREE; } else poffset = 0; if (maybe_ne (bitpos, 0)) poffset += bits_to_bytes_round_down (bitpos); *bitposp = bitpos; *poffsetp = poffset; *offsetp = offset; /* Set *BASE_REF if BASE was a dereferenced reference variable. */ if (base_ref && orig_base != base) *base_ref = orig_base; return base; } /* Returns true if EXPR is or contains (as a sub-component) BASE_PTR. */ static bool is_or_contains_p (tree expr, tree base_ptr) { if ((TREE_CODE (expr) == INDIRECT_REF && TREE_CODE (base_ptr) == MEM_REF) || (TREE_CODE (expr) == MEM_REF && TREE_CODE (base_ptr) == INDIRECT_REF)) return operand_equal_p (TREE_OPERAND (expr, 0), TREE_OPERAND (base_ptr, 0)); while (!operand_equal_p (expr, base_ptr)) { if (TREE_CODE (base_ptr) == COMPOUND_EXPR) base_ptr = TREE_OPERAND (base_ptr, 1); if (TREE_CODE (base_ptr) == COMPONENT_REF || TREE_CODE (base_ptr) == POINTER_PLUS_EXPR || TREE_CODE (base_ptr) == SAVE_EXPR) base_ptr = TREE_OPERAND (base_ptr, 0); else break; } return operand_equal_p (expr, base_ptr); } /* Implement OpenMP 5.x map ordering rules for target directives. There are several rules, and with some level of ambiguity, hopefully we can at least collect the complexity here in one place. */ static void omp_target_reorder_clauses (tree *list_p) { /* Collect refs to alloc/release/delete maps. */ auto_vec ard; tree *cp = list_p; while (*cp != NULL_TREE) if (OMP_CLAUSE_CODE (*cp) == OMP_CLAUSE_MAP && (OMP_CLAUSE_MAP_KIND (*cp) == GOMP_MAP_ALLOC || OMP_CLAUSE_MAP_KIND (*cp) == GOMP_MAP_RELEASE || OMP_CLAUSE_MAP_KIND (*cp) == GOMP_MAP_DELETE)) { /* Unlink cp and push to ard. */ tree c = *cp; tree nc = OMP_CLAUSE_CHAIN (c); *cp = nc; ard.safe_push (c); /* Any associated pointer type maps should also move along. */ while (*cp != NULL_TREE && OMP_CLAUSE_CODE (*cp) == OMP_CLAUSE_MAP && (OMP_CLAUSE_MAP_KIND (*cp) == GOMP_MAP_FIRSTPRIVATE_REFERENCE || OMP_CLAUSE_MAP_KIND (*cp) == GOMP_MAP_FIRSTPRIVATE_POINTER || OMP_CLAUSE_MAP_KIND (*cp) == GOMP_MAP_ATTACH_DETACH || OMP_CLAUSE_MAP_KIND (*cp) == GOMP_MAP_POINTER || OMP_CLAUSE_MAP_KIND (*cp) == GOMP_MAP_ALWAYS_POINTER || OMP_CLAUSE_MAP_KIND (*cp) == GOMP_MAP_TO_PSET)) { c = *cp; nc = OMP_CLAUSE_CHAIN (c); *cp = nc; ard.safe_push (c); } } else cp = &OMP_CLAUSE_CHAIN (*cp); /* Link alloc/release/delete maps to the end of list. */ for (unsigned int i = 0; i < ard.length (); i++) { *cp = ard[i]; cp = &OMP_CLAUSE_CHAIN (ard[i]); } *cp = NULL_TREE; /* OpenMP 5.0 requires that pointer variables are mapped before its use as a base-pointer. */ auto_vec atf; for (tree *cp = list_p; *cp; cp = &OMP_CLAUSE_CHAIN (*cp)) if (OMP_CLAUSE_CODE (*cp) == OMP_CLAUSE_MAP) { /* Collect alloc, to, from, to/from clause tree pointers. */ gomp_map_kind k = OMP_CLAUSE_MAP_KIND (*cp); if (k == GOMP_MAP_ALLOC || k == GOMP_MAP_TO || k == GOMP_MAP_FROM || k == GOMP_MAP_TOFROM || k == GOMP_MAP_ALWAYS_TO || k == GOMP_MAP_ALWAYS_FROM || k == GOMP_MAP_ALWAYS_TOFROM) atf.safe_push (cp); } for (unsigned int i = 0; i < atf.length (); i++) if (atf[i]) { tree *cp = atf[i]; tree decl = OMP_CLAUSE_DECL (*cp); if (TREE_CODE (decl) == INDIRECT_REF || TREE_CODE (decl) == MEM_REF) { tree base_ptr = TREE_OPERAND (decl, 0); STRIP_TYPE_NOPS (base_ptr); for (unsigned int j = i + 1; j < atf.length (); j++) if (atf[j]) { tree *cp2 = atf[j]; tree decl2 = OMP_CLAUSE_DECL (*cp2); decl2 = OMP_CLAUSE_DECL (*cp2); if (is_or_contains_p (decl2, base_ptr)) { /* Move *cp2 to before *cp. */ tree c = *cp2; *cp2 = OMP_CLAUSE_CHAIN (c); OMP_CLAUSE_CHAIN (c) = *cp; *cp = c; if (*cp2 != NULL_TREE && OMP_CLAUSE_CODE (*cp2) == OMP_CLAUSE_MAP && OMP_CLAUSE_MAP_KIND (*cp2) == GOMP_MAP_ALWAYS_POINTER) { tree c2 = *cp2; *cp2 = OMP_CLAUSE_CHAIN (c2); OMP_CLAUSE_CHAIN (c2) = OMP_CLAUSE_CHAIN (c); OMP_CLAUSE_CHAIN (c) = c2; } atf[j] = NULL; } } } } /* For attach_detach map clauses, if there is another map that maps the attached/detached pointer, make sure that map is ordered before the attach_detach. */ atf.truncate (0); for (tree *cp = list_p; *cp; cp = &OMP_CLAUSE_CHAIN (*cp)) if (OMP_CLAUSE_CODE (*cp) == OMP_CLAUSE_MAP) { /* Collect alloc, to, from, to/from clauses, and always_pointer/attach_detach clauses. */ gomp_map_kind k = OMP_CLAUSE_MAP_KIND (*cp); if (k == GOMP_MAP_ALLOC || k == GOMP_MAP_TO || k == GOMP_MAP_FROM || k == GOMP_MAP_TOFROM || k == GOMP_MAP_ALWAYS_TO || k == GOMP_MAP_ALWAYS_FROM || k == GOMP_MAP_ALWAYS_TOFROM || k == GOMP_MAP_ATTACH_DETACH || k == GOMP_MAP_ALWAYS_POINTER) atf.safe_push (cp); } for (unsigned int i = 0; i < atf.length (); i++) if (atf[i]) { tree *cp = atf[i]; tree ptr = OMP_CLAUSE_DECL (*cp); STRIP_TYPE_NOPS (ptr); if (OMP_CLAUSE_MAP_KIND (*cp) == GOMP_MAP_ATTACH_DETACH) for (unsigned int j = i + 1; j < atf.length (); j++) { tree *cp2 = atf[j]; tree decl2 = OMP_CLAUSE_DECL (*cp2); if (OMP_CLAUSE_MAP_KIND (*cp2) != GOMP_MAP_ATTACH_DETACH && OMP_CLAUSE_MAP_KIND (*cp2) != GOMP_MAP_ALWAYS_POINTER && is_or_contains_p (decl2, ptr)) { /* Move *cp2 to before *cp. */ tree c = *cp2; *cp2 = OMP_CLAUSE_CHAIN (c); OMP_CLAUSE_CHAIN (c) = *cp; *cp = c; atf[j] = NULL; /* If decl2 is of the form '*decl2_opnd0', and followed by an ALWAYS_POINTER or ATTACH_DETACH of 'decl2_opnd0', move the pointer operation along with *cp2. This can happen for C++ reference sequences. */ if (j + 1 < atf.length () && (TREE_CODE (decl2) == INDIRECT_REF || TREE_CODE (decl2) == MEM_REF)) { tree *cp3 = atf[j + 1]; tree decl3 = OMP_CLAUSE_DECL (*cp3); tree decl2_opnd0 = TREE_OPERAND (decl2, 0); if ((OMP_CLAUSE_MAP_KIND (*cp3) == GOMP_MAP_ALWAYS_POINTER || OMP_CLAUSE_MAP_KIND (*cp3) == GOMP_MAP_ATTACH_DETACH) && operand_equal_p (decl3, decl2_opnd0)) { /* Also move *cp3 to before *cp. */ c = *cp3; *cp2 = OMP_CLAUSE_CHAIN (c); OMP_CLAUSE_CHAIN (c) = *cp; *cp = c; atf[j + 1] = NULL; j += 1; } } } } } } /* DECL is supposed to have lastprivate semantics in the outer contexts of combined/composite constructs, starting with OCTX. Add needed lastprivate, shared or map clause if no data sharing or mapping clause are present. IMPLICIT_P is true if it is an implicit clause (IV on simd), in which case the lastprivate will not be copied to some constructs. */ static void omp_lastprivate_for_combined_outer_constructs (struct gimplify_omp_ctx *octx, tree decl, bool implicit_p) { struct gimplify_omp_ctx *orig_octx = octx; for (; octx; octx = octx->outer_context) { if ((octx->region_type == ORT_COMBINED_PARALLEL || (octx->region_type & ORT_COMBINED_TEAMS) == ORT_COMBINED_TEAMS) && splay_tree_lookup (octx->variables, (splay_tree_key) decl) == NULL) { omp_add_variable (octx, decl, GOVD_SHARED | GOVD_SEEN); continue; } if ((octx->region_type & ORT_TASK) != 0 && octx->combined_loop && splay_tree_lookup (octx->variables, (splay_tree_key) decl) == NULL) { omp_add_variable (octx, decl, GOVD_LASTPRIVATE | GOVD_SEEN); continue; } if (implicit_p && octx->region_type == ORT_WORKSHARE && octx->combined_loop && splay_tree_lookup (octx->variables, (splay_tree_key) decl) == NULL && octx->outer_context && octx->outer_context->region_type == ORT_COMBINED_PARALLEL && splay_tree_lookup (octx->outer_context->variables, (splay_tree_key) decl) == NULL) { octx = octx->outer_context; omp_add_variable (octx, decl, GOVD_LASTPRIVATE | GOVD_SEEN); continue; } if ((octx->region_type == ORT_WORKSHARE || octx->region_type == ORT_ACC) && octx->combined_loop && splay_tree_lookup (octx->variables, (splay_tree_key) decl) == NULL && !omp_check_private (octx, decl, false)) { omp_add_variable (octx, decl, GOVD_LASTPRIVATE | GOVD_SEEN); continue; } if (octx->region_type == ORT_COMBINED_TARGET) { splay_tree_node n = splay_tree_lookup (octx->variables, (splay_tree_key) decl); if (n == NULL) { omp_add_variable (octx, decl, GOVD_MAP | GOVD_SEEN); octx = octx->outer_context; } else if (!implicit_p && (n->value & GOVD_FIRSTPRIVATE_IMPLICIT)) { n->value &= ~(GOVD_FIRSTPRIVATE | GOVD_FIRSTPRIVATE_IMPLICIT | GOVD_EXPLICIT); omp_add_variable (octx, decl, GOVD_MAP | GOVD_SEEN); octx = octx->outer_context; } } break; } if (octx && (implicit_p || octx != orig_octx)) omp_notice_variable (octx, decl, true); } /* Scan the OMP clauses in *LIST_P, installing mappings into a new and previous omp contexts. */ static void gimplify_scan_omp_clauses (tree *list_p, gimple_seq *pre_p, enum omp_region_type region_type, enum tree_code code) { struct gimplify_omp_ctx *ctx, *outer_ctx; tree c; hash_map *struct_map_to_clause = NULL; hash_map *struct_seen_clause = NULL; hash_set *struct_deref_set = NULL; tree *prev_list_p = NULL, *orig_list_p = list_p; int handled_depend_iterators = -1; int nowait = -1; ctx = new_omp_context (region_type); ctx->code = code; outer_ctx = ctx->outer_context; if (code == OMP_TARGET) { if (!lang_GNU_Fortran ()) ctx->defaultmap[GDMK_POINTER] = GOVD_MAP | GOVD_MAP_0LEN_ARRAY; ctx->defaultmap[GDMK_SCALAR] = GOVD_FIRSTPRIVATE; ctx->defaultmap[GDMK_SCALAR_TARGET] = (lang_GNU_Fortran () ? GOVD_MAP : GOVD_FIRSTPRIVATE); } if (!lang_GNU_Fortran ()) switch (code) { case OMP_TARGET: case OMP_TARGET_DATA: case OMP_TARGET_ENTER_DATA: case OMP_TARGET_EXIT_DATA: case OACC_DECLARE: case OACC_HOST_DATA: case OACC_PARALLEL: case OACC_KERNELS: ctx->target_firstprivatize_array_bases = true; default: break; } if (code == OMP_TARGET || code == OMP_TARGET_DATA || code == OMP_TARGET_ENTER_DATA || code == OMP_TARGET_EXIT_DATA) omp_target_reorder_clauses (list_p); while ((c = *list_p) != NULL) { bool remove = false; bool notice_outer = true; const char *check_non_private = NULL; unsigned int flags; tree decl; switch (OMP_CLAUSE_CODE (c)) { case OMP_CLAUSE_PRIVATE: flags = GOVD_PRIVATE | GOVD_EXPLICIT; if (lang_hooks.decls.omp_private_outer_ref (OMP_CLAUSE_DECL (c))) { flags |= GOVD_PRIVATE_OUTER_REF; OMP_CLAUSE_PRIVATE_OUTER_REF (c) = 1; } else notice_outer = false; goto do_add; case OMP_CLAUSE_SHARED: flags = GOVD_SHARED | GOVD_EXPLICIT; goto do_add; case OMP_CLAUSE_FIRSTPRIVATE: flags = GOVD_FIRSTPRIVATE | GOVD_EXPLICIT; check_non_private = "firstprivate"; if (OMP_CLAUSE_FIRSTPRIVATE_IMPLICIT (c)) { gcc_assert (code == OMP_TARGET); flags |= GOVD_FIRSTPRIVATE_IMPLICIT; } goto do_add; case OMP_CLAUSE_LASTPRIVATE: if (OMP_CLAUSE_LASTPRIVATE_CONDITIONAL (c)) switch (code) { case OMP_DISTRIBUTE: error_at (OMP_CLAUSE_LOCATION (c), "conditional % clause on " "%qs construct", "distribute"); OMP_CLAUSE_LASTPRIVATE_CONDITIONAL (c) = 0; break; case OMP_TASKLOOP: error_at (OMP_CLAUSE_LOCATION (c), "conditional % clause on " "%qs construct", "taskloop"); OMP_CLAUSE_LASTPRIVATE_CONDITIONAL (c) = 0; break; default: break; } flags = GOVD_LASTPRIVATE | GOVD_SEEN | GOVD_EXPLICIT; if (code != OMP_LOOP) check_non_private = "lastprivate"; decl = OMP_CLAUSE_DECL (c); if (error_operand_p (decl)) goto do_add; if (OMP_CLAUSE_LASTPRIVATE_CONDITIONAL (c) && !lang_hooks.decls.omp_scalar_p (decl, true)) { error_at (OMP_CLAUSE_LOCATION (c), "non-scalar variable %qD in conditional " "% clause", decl); OMP_CLAUSE_LASTPRIVATE_CONDITIONAL (c) = 0; } if (OMP_CLAUSE_LASTPRIVATE_CONDITIONAL (c)) flags |= GOVD_LASTPRIVATE_CONDITIONAL; omp_lastprivate_for_combined_outer_constructs (outer_ctx, decl, false); goto do_add; case OMP_CLAUSE_REDUCTION: if (OMP_CLAUSE_REDUCTION_TASK (c)) { if (region_type == ORT_WORKSHARE || code == OMP_SCOPE) { if (nowait == -1) nowait = omp_find_clause (*list_p, OMP_CLAUSE_NOWAIT) != NULL_TREE; if (nowait && (outer_ctx == NULL || outer_ctx->region_type != ORT_COMBINED_PARALLEL)) { error_at (OMP_CLAUSE_LOCATION (c), "% reduction modifier on a construct " "with a % clause"); OMP_CLAUSE_REDUCTION_TASK (c) = 0; } } else if ((region_type & ORT_PARALLEL) != ORT_PARALLEL) { error_at (OMP_CLAUSE_LOCATION (c), "invalid % reduction modifier on construct " "other than %, %qs, % or " "%", lang_GNU_Fortran () ? "do" : "for"); OMP_CLAUSE_REDUCTION_TASK (c) = 0; } } if (OMP_CLAUSE_REDUCTION_INSCAN (c)) switch (code) { case OMP_SECTIONS: error_at (OMP_CLAUSE_LOCATION (c), "% % clause on " "%qs construct", "sections"); OMP_CLAUSE_REDUCTION_INSCAN (c) = 0; break; case OMP_PARALLEL: error_at (OMP_CLAUSE_LOCATION (c), "% % clause on " "%qs construct", "parallel"); OMP_CLAUSE_REDUCTION_INSCAN (c) = 0; break; case OMP_TEAMS: error_at (OMP_CLAUSE_LOCATION (c), "% % clause on " "%qs construct", "teams"); OMP_CLAUSE_REDUCTION_INSCAN (c) = 0; break; case OMP_TASKLOOP: error_at (OMP_CLAUSE_LOCATION (c), "% % clause on " "%qs construct", "taskloop"); OMP_CLAUSE_REDUCTION_INSCAN (c) = 0; break; case OMP_SCOPE: error_at (OMP_CLAUSE_LOCATION (c), "% % clause on " "%qs construct", "scope"); OMP_CLAUSE_REDUCTION_INSCAN (c) = 0; break; default: break; } /* FALLTHRU */ case OMP_CLAUSE_IN_REDUCTION: case OMP_CLAUSE_TASK_REDUCTION: flags = GOVD_REDUCTION | GOVD_SEEN | GOVD_EXPLICIT; /* OpenACC permits reductions on private variables. */ if (!(region_type & ORT_ACC) /* taskgroup is actually not a worksharing region. */ && code != OMP_TASKGROUP) check_non_private = omp_clause_code_name[OMP_CLAUSE_CODE (c)]; decl = OMP_CLAUSE_DECL (c); if (TREE_CODE (decl) == MEM_REF) { tree type = TREE_TYPE (decl); bool saved_into_ssa = gimplify_ctxp->into_ssa; gimplify_ctxp->into_ssa = false; if (gimplify_expr (&TYPE_MAX_VALUE (TYPE_DOMAIN (type)), pre_p, NULL, is_gimple_val, fb_rvalue, false) == GS_ERROR) { gimplify_ctxp->into_ssa = saved_into_ssa; remove = true; break; } gimplify_ctxp->into_ssa = saved_into_ssa; tree v = TYPE_MAX_VALUE (TYPE_DOMAIN (type)); if (DECL_P (v)) { omp_firstprivatize_variable (ctx, v); omp_notice_variable (ctx, v, true); } decl = TREE_OPERAND (decl, 0); if (TREE_CODE (decl) == POINTER_PLUS_EXPR) { gimplify_ctxp->into_ssa = false; if (gimplify_expr (&TREE_OPERAND (decl, 1), pre_p, NULL, is_gimple_val, fb_rvalue, false) == GS_ERROR) { gimplify_ctxp->into_ssa = saved_into_ssa; remove = true; break; } gimplify_ctxp->into_ssa = saved_into_ssa; v = TREE_OPERAND (decl, 1); if (DECL_P (v)) { omp_firstprivatize_variable (ctx, v); omp_notice_variable (ctx, v, true); } decl = TREE_OPERAND (decl, 0); } if (TREE_CODE (decl) == ADDR_EXPR || TREE_CODE (decl) == INDIRECT_REF) decl = TREE_OPERAND (decl, 0); } goto do_add_decl; case OMP_CLAUSE_LINEAR: if (gimplify_expr (&OMP_CLAUSE_LINEAR_STEP (c), pre_p, NULL, is_gimple_val, fb_rvalue) == GS_ERROR) { remove = true; break; } else { if (code == OMP_SIMD && !OMP_CLAUSE_LINEAR_NO_COPYIN (c)) { struct gimplify_omp_ctx *octx = outer_ctx; if (octx && octx->region_type == ORT_WORKSHARE && octx->combined_loop && !octx->distribute) { if (octx->outer_context && (octx->outer_context->region_type == ORT_COMBINED_PARALLEL)) octx = octx->outer_context->outer_context; else octx = octx->outer_context; } if (octx && octx->region_type == ORT_WORKSHARE && octx->combined_loop && octx->distribute) { error_at (OMP_CLAUSE_LOCATION (c), "% clause for variable other than " "loop iterator specified on construct " "combined with %"); remove = true; break; } } /* For combined #pragma omp parallel for simd, need to put lastprivate and perhaps firstprivate too on the parallel. Similarly for #pragma omp for simd. */ struct gimplify_omp_ctx *octx = outer_ctx; bool taskloop_seen = false; decl = NULL_TREE; do { if (OMP_CLAUSE_LINEAR_NO_COPYIN (c) && OMP_CLAUSE_LINEAR_NO_COPYOUT (c)) break; decl = OMP_CLAUSE_DECL (c); if (error_operand_p (decl)) { decl = NULL_TREE; break; } flags = GOVD_SEEN; if (!OMP_CLAUSE_LINEAR_NO_COPYIN (c)) flags |= GOVD_FIRSTPRIVATE; if (!OMP_CLAUSE_LINEAR_NO_COPYOUT (c)) flags |= GOVD_LASTPRIVATE; if (octx && octx->region_type == ORT_WORKSHARE && octx->combined_loop) { if (octx->outer_context && (octx->outer_context->region_type == ORT_COMBINED_PARALLEL)) octx = octx->outer_context; else if (omp_check_private (octx, decl, false)) break; } else if (octx && (octx->region_type & ORT_TASK) != 0 && octx->combined_loop) taskloop_seen = true; else if (octx && octx->region_type == ORT_COMBINED_PARALLEL && ((ctx->region_type == ORT_WORKSHARE && octx == outer_ctx) || taskloop_seen)) flags = GOVD_SEEN | GOVD_SHARED; else if (octx && ((octx->region_type & ORT_COMBINED_TEAMS) == ORT_COMBINED_TEAMS)) flags = GOVD_SEEN | GOVD_SHARED; else if (octx && octx->region_type == ORT_COMBINED_TARGET) { if (flags & GOVD_LASTPRIVATE) flags = GOVD_SEEN | GOVD_MAP; } else break; splay_tree_node on = splay_tree_lookup (octx->variables, (splay_tree_key) decl); if (on && (on->value & GOVD_DATA_SHARE_CLASS) != 0) { octx = NULL; break; } omp_add_variable (octx, decl, flags); if (octx->outer_context == NULL) break; octx = octx->outer_context; } while (1); if (octx && decl && (!OMP_CLAUSE_LINEAR_NO_COPYIN (c) || !OMP_CLAUSE_LINEAR_NO_COPYOUT (c))) omp_notice_variable (octx, decl, true); } flags = GOVD_LINEAR | GOVD_EXPLICIT; if (OMP_CLAUSE_LINEAR_NO_COPYIN (c) && OMP_CLAUSE_LINEAR_NO_COPYOUT (c)) { notice_outer = false; flags |= GOVD_LINEAR_LASTPRIVATE_NO_OUTER; } goto do_add; case OMP_CLAUSE_MAP: decl = OMP_CLAUSE_DECL (c); if (error_operand_p (decl)) remove = true; switch (code) { case OMP_TARGET: break; case OACC_DATA: if (TREE_CODE (TREE_TYPE (decl)) != ARRAY_TYPE) break; /* FALLTHRU */ case OMP_TARGET_DATA: case OMP_TARGET_ENTER_DATA: case OMP_TARGET_EXIT_DATA: case OACC_ENTER_DATA: case OACC_EXIT_DATA: case OACC_HOST_DATA: if (OMP_CLAUSE_MAP_KIND (c) == GOMP_MAP_FIRSTPRIVATE_POINTER || (OMP_CLAUSE_MAP_KIND (c) == GOMP_MAP_FIRSTPRIVATE_REFERENCE)) /* For target {,enter ,exit }data only the array slice is mapped, but not the pointer to it. */ remove = true; break; default: break; } /* For Fortran, not only the pointer to the data is mapped but also the address of the pointer, the array descriptor etc.; for 'exit data' - and in particular for 'delete:' - having an 'alloc:' does not make sense. Likewise, for 'update' only transferring the data itself is needed as the rest has been handled in previous directives. However, for 'exit data', the array descriptor needs to be delete; hence, we turn the MAP_TO_PSET into a MAP_DELETE. NOTE: Generally, it is not safe to perform "enter data" operations on arrays where the data *or the descriptor* may go out of scope before a corresponding "exit data" operation -- and such a descriptor may be synthesized temporarily, e.g. to pass an explicit-shape array to a function expecting an assumed-shape argument. Performing "enter data" inside the called function would thus be problematic. */ if (code == OMP_TARGET_EXIT_DATA && OMP_CLAUSE_MAP_KIND (c) == GOMP_MAP_TO_PSET) OMP_CLAUSE_SET_MAP_KIND (c, OMP_CLAUSE_MAP_KIND (*prev_list_p) == GOMP_MAP_DELETE ? GOMP_MAP_DELETE : GOMP_MAP_RELEASE); else if ((code == OMP_TARGET_EXIT_DATA || code == OMP_TARGET_UPDATE) && (OMP_CLAUSE_MAP_KIND (c) == GOMP_MAP_POINTER || OMP_CLAUSE_MAP_KIND (c) == GOMP_MAP_TO_PSET)) remove = true; if (remove) break; if (DECL_P (decl) && outer_ctx && (region_type & ORT_ACC)) { struct gimplify_omp_ctx *octx; for (octx = outer_ctx; octx; octx = octx->outer_context) { if (octx->region_type != ORT_ACC_HOST_DATA) break; splay_tree_node n2 = splay_tree_lookup (octx->variables, (splay_tree_key) decl); if (n2) error_at (OMP_CLAUSE_LOCATION (c), "variable %qE " "declared in enclosing % region", DECL_NAME (decl)); } } if (OMP_CLAUSE_SIZE (c) == NULL_TREE) OMP_CLAUSE_SIZE (c) = DECL_P (decl) ? DECL_SIZE_UNIT (decl) : TYPE_SIZE_UNIT (TREE_TYPE (decl)); if (gimplify_expr (&OMP_CLAUSE_SIZE (c), pre_p, NULL, is_gimple_val, fb_rvalue) == GS_ERROR) { remove = true; break; } else if ((OMP_CLAUSE_MAP_KIND (c) == GOMP_MAP_FIRSTPRIVATE_POINTER || (OMP_CLAUSE_MAP_KIND (c) == GOMP_MAP_FIRSTPRIVATE_REFERENCE) || OMP_CLAUSE_MAP_KIND (c) == GOMP_MAP_ATTACH_DETACH) && TREE_CODE (OMP_CLAUSE_SIZE (c)) != INTEGER_CST) { OMP_CLAUSE_SIZE (c) = get_initialized_tmp_var (OMP_CLAUSE_SIZE (c), pre_p, NULL, false); if ((region_type & ORT_TARGET) != 0) omp_add_variable (ctx, OMP_CLAUSE_SIZE (c), GOVD_FIRSTPRIVATE | GOVD_SEEN); } if (TREE_CODE (decl) == TARGET_EXPR) { if (gimplify_expr (&OMP_CLAUSE_DECL (c), pre_p, NULL, is_gimple_lvalue, fb_lvalue) == GS_ERROR) remove = true; } else if (!DECL_P (decl)) { tree d = decl, *pd; if (TREE_CODE (d) == ARRAY_REF) { while (TREE_CODE (d) == ARRAY_REF) d = TREE_OPERAND (d, 0); if (TREE_CODE (d) == COMPONENT_REF && TREE_CODE (TREE_TYPE (d)) == ARRAY_TYPE) decl = d; } pd = &OMP_CLAUSE_DECL (c); if (d == decl && TREE_CODE (decl) == INDIRECT_REF && TREE_CODE (TREE_OPERAND (decl, 0)) == COMPONENT_REF && (TREE_CODE (TREE_TYPE (TREE_OPERAND (decl, 0))) == REFERENCE_TYPE) && (OMP_CLAUSE_MAP_KIND (c) != GOMP_MAP_POINTER_TO_ZERO_LENGTH_ARRAY_SECTION)) { pd = &TREE_OPERAND (decl, 0); decl = TREE_OPERAND (decl, 0); } bool indir_p = false; bool component_ref_p = false; tree indir_base = NULL_TREE; tree orig_decl = decl; tree decl_ref = NULL_TREE; if ((region_type & (ORT_ACC | ORT_TARGET | ORT_TARGET_DATA)) != 0 && TREE_CODE (*pd) == COMPONENT_REF && OMP_CLAUSE_MAP_KIND (c) == GOMP_MAP_ATTACH_DETACH && code != OACC_UPDATE) { while (TREE_CODE (decl) == COMPONENT_REF) { decl = TREE_OPERAND (decl, 0); component_ref_p = true; if (((TREE_CODE (decl) == MEM_REF && integer_zerop (TREE_OPERAND (decl, 1))) || INDIRECT_REF_P (decl)) && (TREE_CODE (TREE_TYPE (TREE_OPERAND (decl, 0))) == POINTER_TYPE)) { indir_p = true; indir_base = decl; decl = TREE_OPERAND (decl, 0); STRIP_NOPS (decl); } if (TREE_CODE (decl) == INDIRECT_REF && DECL_P (TREE_OPERAND (decl, 0)) && (TREE_CODE (TREE_TYPE (TREE_OPERAND (decl, 0))) == REFERENCE_TYPE)) { decl_ref = decl; decl = TREE_OPERAND (decl, 0); } } } else if (TREE_CODE (decl) == COMPONENT_REF && (OMP_CLAUSE_MAP_KIND (c) != GOMP_MAP_ATTACH_ZERO_LENGTH_ARRAY_SECTION)) { component_ref_p = true; while (TREE_CODE (decl) == COMPONENT_REF) decl = TREE_OPERAND (decl, 0); if (TREE_CODE (decl) == INDIRECT_REF && DECL_P (TREE_OPERAND (decl, 0)) && (TREE_CODE (TREE_TYPE (TREE_OPERAND (decl, 0))) == REFERENCE_TYPE)) decl = TREE_OPERAND (decl, 0); } if (decl != orig_decl && DECL_P (decl) && indir_p && (TREE_CODE (TREE_TYPE (decl)) == POINTER_TYPE || (decl_ref && TREE_CODE (TREE_TYPE (decl_ref)) == POINTER_TYPE))) { gomp_map_kind k = ((code == OACC_EXIT_DATA || code == OMP_TARGET_EXIT_DATA) ? GOMP_MAP_DETACH : GOMP_MAP_ATTACH); /* We have a dereference of a struct member. Make this an attach/detach operation, and ensure the base pointer is mapped as a FIRSTPRIVATE_POINTER. */ OMP_CLAUSE_SET_MAP_KIND (c, k); flags = GOVD_MAP | GOVD_SEEN | GOVD_EXPLICIT; tree next_clause = OMP_CLAUSE_CHAIN (c); if (k == GOMP_MAP_ATTACH && code != OACC_ENTER_DATA && code != OMP_TARGET_ENTER_DATA && (!next_clause || (OMP_CLAUSE_CODE (next_clause) != OMP_CLAUSE_MAP) || (OMP_CLAUSE_MAP_KIND (next_clause) != GOMP_MAP_POINTER) || OMP_CLAUSE_DECL (next_clause) != decl) && (!struct_deref_set || !struct_deref_set->contains (decl)) && (!struct_map_to_clause || !struct_map_to_clause->get (indir_base))) { if (!struct_deref_set) struct_deref_set = new hash_set (); /* As well as the attach, we also need a FIRSTPRIVATE_POINTER clause to properly map the pointer to the struct base. */ tree c2 = build_omp_clause (OMP_CLAUSE_LOCATION (c), OMP_CLAUSE_MAP); OMP_CLAUSE_SET_MAP_KIND (c2, GOMP_MAP_ALLOC); OMP_CLAUSE_MAP_MAYBE_ZERO_LENGTH_ARRAY_SECTION (c2) = 1; tree charptr_zero = build_int_cst (build_pointer_type (char_type_node), 0); OMP_CLAUSE_DECL (c2) = build2 (MEM_REF, char_type_node, decl_ref ? decl_ref : decl, charptr_zero); OMP_CLAUSE_SIZE (c2) = size_zero_node; tree c3 = build_omp_clause (OMP_CLAUSE_LOCATION (c), OMP_CLAUSE_MAP); OMP_CLAUSE_SET_MAP_KIND (c3, GOMP_MAP_FIRSTPRIVATE_POINTER); OMP_CLAUSE_DECL (c3) = decl; OMP_CLAUSE_SIZE (c3) = size_zero_node; tree mapgrp = *prev_list_p; *prev_list_p = c2; OMP_CLAUSE_CHAIN (c3) = mapgrp; OMP_CLAUSE_CHAIN (c2) = c3; struct_deref_set->add (decl); } goto do_add_decl; } /* An "attach/detach" operation on an update directive should behave as a GOMP_MAP_ALWAYS_POINTER. Beware that unlike attach or detach map kinds, GOMP_MAP_ALWAYS_POINTER depends on the previous mapping. */ if (code == OACC_UPDATE && OMP_CLAUSE_MAP_KIND (c) == GOMP_MAP_ATTACH_DETACH) OMP_CLAUSE_SET_MAP_KIND (c, GOMP_MAP_ALWAYS_POINTER); if ((DECL_P (decl) || (component_ref_p && (INDIRECT_REF_P (decl) || TREE_CODE (decl) == MEM_REF || TREE_CODE (decl) == ARRAY_REF))) && OMP_CLAUSE_MAP_KIND (c) != GOMP_MAP_TO_PSET && OMP_CLAUSE_MAP_KIND (c) != GOMP_MAP_ATTACH && OMP_CLAUSE_MAP_KIND (c) != GOMP_MAP_DETACH && code != OACC_UPDATE && code != OMP_TARGET_UPDATE) { if (error_operand_p (decl)) { remove = true; break; } tree stype = TREE_TYPE (decl); if (TREE_CODE (stype) == REFERENCE_TYPE) stype = TREE_TYPE (stype); if (TYPE_SIZE_UNIT (stype) == NULL || TREE_CODE (TYPE_SIZE_UNIT (stype)) != INTEGER_CST) { error_at (OMP_CLAUSE_LOCATION (c), "mapping field %qE of variable length " "structure", OMP_CLAUSE_DECL (c)); remove = true; break; } if (OMP_CLAUSE_MAP_KIND (c) == GOMP_MAP_ALWAYS_POINTER || OMP_CLAUSE_MAP_KIND (c) == GOMP_MAP_ATTACH_DETACH) { /* Error recovery. */ if (prev_list_p == NULL) { remove = true; break; } /* The below prev_list_p based error recovery code is currently no longer valid for OpenMP. */ if (code != OMP_TARGET && code != OMP_TARGET_DATA && code != OMP_TARGET_UPDATE && code != OMP_TARGET_ENTER_DATA && code != OMP_TARGET_EXIT_DATA && OMP_CLAUSE_CHAIN (*prev_list_p) != c) { tree ch = OMP_CLAUSE_CHAIN (*prev_list_p); if (ch == NULL_TREE || OMP_CLAUSE_CHAIN (ch) != c) { remove = true; break; } } } poly_offset_int offset1; poly_int64 bitpos1; tree tree_offset1; tree base_ref; tree base = extract_base_bit_offset (OMP_CLAUSE_DECL (c), &base_ref, &bitpos1, &offset1, &tree_offset1); bool do_map_struct = (base == decl && !tree_offset1); splay_tree_node n = (DECL_P (decl) ? splay_tree_lookup (ctx->variables, (splay_tree_key) decl) : NULL); bool ptr = (OMP_CLAUSE_MAP_KIND (c) == GOMP_MAP_ALWAYS_POINTER); bool attach_detach = (OMP_CLAUSE_MAP_KIND (c) == GOMP_MAP_ATTACH_DETACH); bool attach = OMP_CLAUSE_MAP_KIND (c) == GOMP_MAP_ATTACH || OMP_CLAUSE_MAP_KIND (c) == GOMP_MAP_DETACH; bool has_attachments = false; /* For OpenACC, pointers in structs should trigger an attach action. */ if (attach_detach && ((region_type & (ORT_ACC | ORT_TARGET | ORT_TARGET_DATA)) || code == OMP_TARGET_ENTER_DATA || code == OMP_TARGET_EXIT_DATA)) { /* Turn a GOMP_MAP_ATTACH_DETACH clause into a GOMP_MAP_ATTACH or GOMP_MAP_DETACH clause after we have detected a case that needs a GOMP_MAP_STRUCT mapping added. */ gomp_map_kind k = ((code == OACC_EXIT_DATA || code == OMP_TARGET_EXIT_DATA) ? GOMP_MAP_DETACH : GOMP_MAP_ATTACH); OMP_CLAUSE_SET_MAP_KIND (c, k); has_attachments = true; } /* We currently don't handle non-constant offset accesses wrt to GOMP_MAP_STRUCT elements. */ if (!do_map_struct) goto skip_map_struct; /* Nor for attach_detach for OpenMP. */ if ((code == OMP_TARGET || code == OMP_TARGET_DATA || code == OMP_TARGET_UPDATE || code == OMP_TARGET_ENTER_DATA || code == OMP_TARGET_EXIT_DATA) && attach_detach) { if (DECL_P (decl)) { if (struct_seen_clause == NULL) struct_seen_clause = new hash_map; if (!struct_seen_clause->get (decl)) struct_seen_clause->put (decl, list_p); } goto skip_map_struct; } if ((DECL_P (decl) && (n == NULL || (n->value & GOVD_MAP) == 0)) || (!DECL_P (decl) && (!struct_map_to_clause || struct_map_to_clause->get (decl) == NULL))) { tree l = build_omp_clause (OMP_CLAUSE_LOCATION (c), OMP_CLAUSE_MAP); gomp_map_kind k = attach ? GOMP_MAP_FORCE_PRESENT : GOMP_MAP_STRUCT; OMP_CLAUSE_SET_MAP_KIND (l, k); if (base_ref) OMP_CLAUSE_DECL (l) = unshare_expr (base_ref); else { OMP_CLAUSE_DECL (l) = unshare_expr (decl); if (!DECL_P (OMP_CLAUSE_DECL (l)) && (gimplify_expr (&OMP_CLAUSE_DECL (l), pre_p, NULL, is_gimple_lvalue, fb_lvalue) == GS_ERROR)) { remove = true; break; } } OMP_CLAUSE_SIZE (l) = (!attach ? size_int (1) : DECL_P (OMP_CLAUSE_DECL (l)) ? DECL_SIZE_UNIT (OMP_CLAUSE_DECL (l)) : TYPE_SIZE_UNIT (TREE_TYPE (OMP_CLAUSE_DECL (l)))); if (struct_map_to_clause == NULL) struct_map_to_clause = new hash_map; struct_map_to_clause->put (decl, l); if (ptr || attach_detach) { tree **sc = (struct_seen_clause ? struct_seen_clause->get (decl) : NULL); tree *insert_node_pos = sc ? *sc : prev_list_p; insert_struct_comp_map (code, c, l, *insert_node_pos, NULL); *insert_node_pos = l; prev_list_p = NULL; } else { OMP_CLAUSE_CHAIN (l) = c; *list_p = l; list_p = &OMP_CLAUSE_CHAIN (l); } if (base_ref && code == OMP_TARGET) { tree c2 = build_omp_clause (OMP_CLAUSE_LOCATION (c), OMP_CLAUSE_MAP); enum gomp_map_kind mkind = GOMP_MAP_FIRSTPRIVATE_REFERENCE; OMP_CLAUSE_SET_MAP_KIND (c2, mkind); OMP_CLAUSE_DECL (c2) = decl; OMP_CLAUSE_SIZE (c2) = size_zero_node; OMP_CLAUSE_CHAIN (c2) = OMP_CLAUSE_CHAIN (l); OMP_CLAUSE_CHAIN (l) = c2; } flags = GOVD_MAP | GOVD_EXPLICIT; if (GOMP_MAP_ALWAYS_P (OMP_CLAUSE_MAP_KIND (c)) || ptr || attach_detach) flags |= GOVD_SEEN; if (has_attachments) flags |= GOVD_MAP_HAS_ATTACHMENTS; /* If this is a *pointer-to-struct expression, make sure a firstprivate map of the base-pointer exists. */ if (component_ref_p && ((TREE_CODE (decl) == MEM_REF && integer_zerop (TREE_OPERAND (decl, 1))) || INDIRECT_REF_P (decl)) && DECL_P (TREE_OPERAND (decl, 0)) && !splay_tree_lookup (ctx->variables, ((splay_tree_key) TREE_OPERAND (decl, 0)))) { decl = TREE_OPERAND (decl, 0); tree c2 = build_omp_clause (OMP_CLAUSE_LOCATION (c), OMP_CLAUSE_MAP); enum gomp_map_kind mkind = GOMP_MAP_FIRSTPRIVATE_POINTER; OMP_CLAUSE_SET_MAP_KIND (c2, mkind); OMP_CLAUSE_DECL (c2) = decl; OMP_CLAUSE_SIZE (c2) = size_zero_node; OMP_CLAUSE_CHAIN (c2) = OMP_CLAUSE_CHAIN (c); OMP_CLAUSE_CHAIN (c) = c2; } if (DECL_P (decl)) goto do_add_decl; } else if (struct_map_to_clause) { tree *osc = struct_map_to_clause->get (decl); tree *sc = NULL, *scp = NULL; if (n != NULL && (GOMP_MAP_ALWAYS_P (OMP_CLAUSE_MAP_KIND (c)) || ptr || attach_detach)) n->value |= GOVD_SEEN; sc = &OMP_CLAUSE_CHAIN (*osc); if (*sc != c && (OMP_CLAUSE_MAP_KIND (*sc) == GOMP_MAP_FIRSTPRIVATE_REFERENCE)) sc = &OMP_CLAUSE_CHAIN (*sc); /* Here "prev_list_p" is the end of the inserted alloc/release nodes after the struct node, OSC. */ for (; *sc != c; sc = &OMP_CLAUSE_CHAIN (*sc)) if ((ptr || attach_detach) && sc == prev_list_p) break; else if (TREE_CODE (OMP_CLAUSE_DECL (*sc)) != COMPONENT_REF && (TREE_CODE (OMP_CLAUSE_DECL (*sc)) != INDIRECT_REF) && (TREE_CODE (OMP_CLAUSE_DECL (*sc)) != ARRAY_REF)) break; else { tree sc_decl = OMP_CLAUSE_DECL (*sc); poly_offset_int offsetn; poly_int64 bitposn; tree tree_offsetn; tree base = extract_base_bit_offset (sc_decl, NULL, &bitposn, &offsetn, &tree_offsetn); if (base != decl) break; if (scp) continue; if ((region_type & ORT_ACC) != 0) { /* This duplicate checking code is currently only enabled for OpenACC. */ tree d1 = OMP_CLAUSE_DECL (*sc); tree d2 = OMP_CLAUSE_DECL (c); while (TREE_CODE (d1) == ARRAY_REF) d1 = TREE_OPERAND (d1, 0); while (TREE_CODE (d2) == ARRAY_REF) d2 = TREE_OPERAND (d2, 0); if (TREE_CODE (d1) == INDIRECT_REF) d1 = TREE_OPERAND (d1, 0); if (TREE_CODE (d2) == INDIRECT_REF) d2 = TREE_OPERAND (d2, 0); while (TREE_CODE (d1) == COMPONENT_REF) if (TREE_CODE (d2) == COMPONENT_REF && TREE_OPERAND (d1, 1) == TREE_OPERAND (d2, 1)) { d1 = TREE_OPERAND (d1, 0); d2 = TREE_OPERAND (d2, 0); } else break; if (d1 == d2) { error_at (OMP_CLAUSE_LOCATION (c), "%qE appears more than once in map " "clauses", OMP_CLAUSE_DECL (c)); remove = true; break; } } if (maybe_lt (offset1, offsetn) || (known_eq (offset1, offsetn) && maybe_lt (bitpos1, bitposn))) { if (ptr || attach_detach) scp = sc; else break; } } if (remove) break; if (!attach) OMP_CLAUSE_SIZE (*osc) = size_binop (PLUS_EXPR, OMP_CLAUSE_SIZE (*osc), size_one_node); if (ptr || attach_detach) { tree cl = insert_struct_comp_map (code, c, NULL, *prev_list_p, scp); if (sc == prev_list_p) { *sc = cl; prev_list_p = NULL; } else { *prev_list_p = OMP_CLAUSE_CHAIN (c); list_p = prev_list_p; prev_list_p = NULL; OMP_CLAUSE_CHAIN (c) = *sc; *sc = cl; continue; } } else if (*sc != c) { if (gimplify_expr (pd, pre_p, NULL, is_gimple_lvalue, fb_lvalue) == GS_ERROR) { remove = true; break; } *list_p = OMP_CLAUSE_CHAIN (c); OMP_CLAUSE_CHAIN (c) = *sc; *sc = c; continue; } } skip_map_struct: ; } else if ((code == OACC_ENTER_DATA || code == OACC_EXIT_DATA || code == OACC_DATA || code == OACC_PARALLEL || code == OACC_KERNELS || code == OACC_SERIAL || code == OMP_TARGET_ENTER_DATA || code == OMP_TARGET_EXIT_DATA) && OMP_CLAUSE_MAP_KIND (c) == GOMP_MAP_ATTACH_DETACH) { gomp_map_kind k = ((code == OACC_EXIT_DATA || code == OMP_TARGET_EXIT_DATA) ? GOMP_MAP_DETACH : GOMP_MAP_ATTACH); OMP_CLAUSE_SET_MAP_KIND (c, k); } if (code == OMP_TARGET && OMP_CLAUSE_MAP_IN_REDUCTION (c)) { /* Don't gimplify *pd fully at this point, as the base will need to be adjusted during omp lowering. */ auto_vec expr_stack; tree *p = pd; while (handled_component_p (*p) || TREE_CODE (*p) == INDIRECT_REF || TREE_CODE (*p) == ADDR_EXPR || TREE_CODE (*p) == MEM_REF || TREE_CODE (*p) == NON_LVALUE_EXPR) { expr_stack.safe_push (*p); p = &TREE_OPERAND (*p, 0); } for (int i = expr_stack.length () - 1; i >= 0; i--) { tree t = expr_stack[i]; if (TREE_CODE (t) == ARRAY_REF || TREE_CODE (t) == ARRAY_RANGE_REF) { if (TREE_OPERAND (t, 2) == NULL_TREE) { tree low = unshare_expr (array_ref_low_bound (t)); if (!is_gimple_min_invariant (low)) { TREE_OPERAND (t, 2) = low; if (gimplify_expr (&TREE_OPERAND (t, 2), pre_p, NULL, is_gimple_reg, fb_rvalue) == GS_ERROR) remove = true; } } else if (gimplify_expr (&TREE_OPERAND (t, 2), pre_p, NULL, is_gimple_reg, fb_rvalue) == GS_ERROR) remove = true; if (TREE_OPERAND (t, 3) == NULL_TREE) { tree elmt_size = array_ref_element_size (t); if (!is_gimple_min_invariant (elmt_size)) { elmt_size = unshare_expr (elmt_size); tree elmt_type = TREE_TYPE (TREE_TYPE (TREE_OPERAND (t, 0))); tree factor = size_int (TYPE_ALIGN_UNIT (elmt_type)); elmt_size = size_binop (EXACT_DIV_EXPR, elmt_size, factor); TREE_OPERAND (t, 3) = elmt_size; if (gimplify_expr (&TREE_OPERAND (t, 3), pre_p, NULL, is_gimple_reg, fb_rvalue) == GS_ERROR) remove = true; } } else if (gimplify_expr (&TREE_OPERAND (t, 3), pre_p, NULL, is_gimple_reg, fb_rvalue) == GS_ERROR) remove = true; } else if (TREE_CODE (t) == COMPONENT_REF) { if (TREE_OPERAND (t, 2) == NULL_TREE) { tree offset = component_ref_field_offset (t); if (!is_gimple_min_invariant (offset)) { offset = unshare_expr (offset); tree field = TREE_OPERAND (t, 1); tree factor = size_int (DECL_OFFSET_ALIGN (field) / BITS_PER_UNIT); offset = size_binop (EXACT_DIV_EXPR, offset, factor); TREE_OPERAND (t, 2) = offset; if (gimplify_expr (&TREE_OPERAND (t, 2), pre_p, NULL, is_gimple_reg, fb_rvalue) == GS_ERROR) remove = true; } } else if (gimplify_expr (&TREE_OPERAND (t, 2), pre_p, NULL, is_gimple_reg, fb_rvalue) == GS_ERROR) remove = true; } } for (; expr_stack.length () > 0; ) { tree t = expr_stack.pop (); if (TREE_CODE (t) == ARRAY_REF || TREE_CODE (t) == ARRAY_RANGE_REF) { if (!is_gimple_min_invariant (TREE_OPERAND (t, 1)) && gimplify_expr (&TREE_OPERAND (t, 1), pre_p, NULL, is_gimple_val, fb_rvalue) == GS_ERROR) remove = true; } } } else if (gimplify_expr (pd, pre_p, NULL, is_gimple_lvalue, fb_lvalue) == GS_ERROR) { remove = true; break; } /* If this was of the form map(*pointer_to_struct), then the 'pointer_to_struct' DECL should be considered deref'ed. */ if ((OMP_CLAUSE_MAP_KIND (c) == GOMP_MAP_ALLOC || GOMP_MAP_COPY_TO_P (OMP_CLAUSE_MAP_KIND (c)) || GOMP_MAP_COPY_FROM_P (OMP_CLAUSE_MAP_KIND (c))) && INDIRECT_REF_P (orig_decl) && DECL_P (TREE_OPERAND (orig_decl, 0)) && TREE_CODE (TREE_TYPE (orig_decl)) == RECORD_TYPE) { tree ptr = TREE_OPERAND (orig_decl, 0); if (!struct_deref_set || !struct_deref_set->contains (ptr)) { if (!struct_deref_set) struct_deref_set = new hash_set (); struct_deref_set->add (ptr); } } if (!remove && OMP_CLAUSE_MAP_KIND (c) != GOMP_MAP_ALWAYS_POINTER && OMP_CLAUSE_MAP_KIND (c) != GOMP_MAP_ATTACH_DETACH && OMP_CLAUSE_MAP_KIND (c) != GOMP_MAP_TO_PSET && OMP_CLAUSE_CHAIN (c) && OMP_CLAUSE_CODE (OMP_CLAUSE_CHAIN (c)) == OMP_CLAUSE_MAP && ((OMP_CLAUSE_MAP_KIND (OMP_CLAUSE_CHAIN (c)) == GOMP_MAP_ALWAYS_POINTER) || (OMP_CLAUSE_MAP_KIND (OMP_CLAUSE_CHAIN (c)) == GOMP_MAP_ATTACH_DETACH) || (OMP_CLAUSE_MAP_KIND (OMP_CLAUSE_CHAIN (c)) == GOMP_MAP_TO_PSET))) prev_list_p = list_p; break; } else { /* DECL_P (decl) == true */ tree *sc; if (struct_map_to_clause && (sc = struct_map_to_clause->get (decl)) != NULL && OMP_CLAUSE_MAP_KIND (*sc) == GOMP_MAP_STRUCT && decl == OMP_CLAUSE_DECL (*sc)) { /* We have found a map of the whole structure after a leading GOMP_MAP_STRUCT has been created, so refill the leading clause into a map of the whole structure variable, and remove the current one. TODO: we should be able to remove some maps of the following structure element maps if they are of compatible TO/FROM/ALLOC type. */ OMP_CLAUSE_SET_MAP_KIND (*sc, OMP_CLAUSE_MAP_KIND (c)); OMP_CLAUSE_SIZE (*sc) = unshare_expr (OMP_CLAUSE_SIZE (c)); remove = true; break; } } flags = GOVD_MAP | GOVD_EXPLICIT; if (OMP_CLAUSE_MAP_KIND (c) == GOMP_MAP_ALWAYS_TO || OMP_CLAUSE_MAP_KIND (c) == GOMP_MAP_ALWAYS_TOFROM) flags |= GOVD_MAP_ALWAYS_TO; if ((code == OMP_TARGET || code == OMP_TARGET_DATA || code == OMP_TARGET_ENTER_DATA || code == OMP_TARGET_EXIT_DATA) && OMP_CLAUSE_MAP_KIND (c) == GOMP_MAP_ATTACH_DETACH) { for (struct gimplify_omp_ctx *octx = outer_ctx; octx; octx = octx->outer_context) { splay_tree_node n = splay_tree_lookup (octx->variables, (splay_tree_key) OMP_CLAUSE_DECL (c)); /* If this is contained in an outer OpenMP region as a firstprivate value, remove the attach/detach. */ if (n && (n->value & GOVD_FIRSTPRIVATE)) { OMP_CLAUSE_SET_MAP_KIND (c, GOMP_MAP_FIRSTPRIVATE_POINTER); goto do_add; } } enum gomp_map_kind map_kind = (code == OMP_TARGET_EXIT_DATA ? GOMP_MAP_DETACH : GOMP_MAP_ATTACH); OMP_CLAUSE_SET_MAP_KIND (c, map_kind); } goto do_add; case OMP_CLAUSE_AFFINITY: gimplify_omp_affinity (list_p, pre_p); remove = true; break; case OMP_CLAUSE_DEPEND: if (OMP_CLAUSE_DEPEND_KIND (c) == OMP_CLAUSE_DEPEND_SINK) { tree deps = OMP_CLAUSE_DECL (c); while (deps && TREE_CODE (deps) == TREE_LIST) { if (TREE_CODE (TREE_PURPOSE (deps)) == TRUNC_DIV_EXPR && DECL_P (TREE_OPERAND (TREE_PURPOSE (deps), 1))) gimplify_expr (&TREE_OPERAND (TREE_PURPOSE (deps), 1), pre_p, NULL, is_gimple_val, fb_rvalue); deps = TREE_CHAIN (deps); } break; } else if (OMP_CLAUSE_DEPEND_KIND (c) == OMP_CLAUSE_DEPEND_SOURCE) break; if (handled_depend_iterators == -1) handled_depend_iterators = gimplify_omp_depend (list_p, pre_p); if (handled_depend_iterators) { if (handled_depend_iterators == 2) remove = true; break; } if (TREE_CODE (OMP_CLAUSE_DECL (c)) == COMPOUND_EXPR) { gimplify_expr (&TREE_OPERAND (OMP_CLAUSE_DECL (c), 0), pre_p, NULL, is_gimple_val, fb_rvalue); OMP_CLAUSE_DECL (c) = TREE_OPERAND (OMP_CLAUSE_DECL (c), 1); } if (error_operand_p (OMP_CLAUSE_DECL (c))) { remove = true; break; } OMP_CLAUSE_DECL (c) = build_fold_addr_expr (OMP_CLAUSE_DECL (c)); if (gimplify_expr (&OMP_CLAUSE_DECL (c), pre_p, NULL, is_gimple_val, fb_rvalue) == GS_ERROR) { remove = true; break; } if (code == OMP_TASK) ctx->has_depend = true; break; case OMP_CLAUSE_TO: case OMP_CLAUSE_FROM: case OMP_CLAUSE__CACHE_: decl = OMP_CLAUSE_DECL (c); if (error_operand_p (decl)) { remove = true; break; } if (OMP_CLAUSE_SIZE (c) == NULL_TREE) OMP_CLAUSE_SIZE (c) = DECL_P (decl) ? DECL_SIZE_UNIT (decl) : TYPE_SIZE_UNIT (TREE_TYPE (decl)); if (gimplify_expr (&OMP_CLAUSE_SIZE (c), pre_p, NULL, is_gimple_val, fb_rvalue) == GS_ERROR) { remove = true; break; } if (!DECL_P (decl)) { if (gimplify_expr (&OMP_CLAUSE_DECL (c), pre_p, NULL, is_gimple_lvalue, fb_lvalue) == GS_ERROR) { remove = true; break; } break; } goto do_notice; case OMP_CLAUSE_USE_DEVICE_PTR: case OMP_CLAUSE_USE_DEVICE_ADDR: flags = GOVD_EXPLICIT; goto do_add; case OMP_CLAUSE_HAS_DEVICE_ADDR: decl = OMP_CLAUSE_DECL (c); while (TREE_CODE (decl) == INDIRECT_REF || TREE_CODE (decl) == ARRAY_REF) decl = TREE_OPERAND (decl, 0); flags = GOVD_EXPLICIT; goto do_add_decl; case OMP_CLAUSE_IS_DEVICE_PTR: flags = GOVD_FIRSTPRIVATE | GOVD_EXPLICIT; goto do_add; do_add: decl = OMP_CLAUSE_DECL (c); do_add_decl: if (error_operand_p (decl)) { remove = true; break; } if (DECL_NAME (decl) == NULL_TREE && (flags & GOVD_SHARED) == 0) { tree t = omp_member_access_dummy_var (decl); if (t) { tree v = DECL_VALUE_EXPR (decl); DECL_NAME (decl) = DECL_NAME (TREE_OPERAND (v, 1)); if (outer_ctx) omp_notice_variable (outer_ctx, t, true); } } if (code == OACC_DATA && OMP_CLAUSE_CODE (c) == OMP_CLAUSE_MAP && OMP_CLAUSE_MAP_KIND (c) == GOMP_MAP_FIRSTPRIVATE_POINTER) flags |= GOVD_MAP_0LEN_ARRAY; omp_add_variable (ctx, decl, flags); if ((OMP_CLAUSE_CODE (c) == OMP_CLAUSE_REDUCTION || OMP_CLAUSE_CODE (c) == OMP_CLAUSE_IN_REDUCTION || OMP_CLAUSE_CODE (c) == OMP_CLAUSE_TASK_REDUCTION) && OMP_CLAUSE_REDUCTION_PLACEHOLDER (c)) { struct gimplify_omp_ctx *pctx = code == OMP_TARGET ? outer_ctx : ctx; if (pctx) omp_add_variable (pctx, OMP_CLAUSE_REDUCTION_PLACEHOLDER (c), GOVD_LOCAL | GOVD_SEEN); if (pctx && OMP_CLAUSE_REDUCTION_DECL_PLACEHOLDER (c) && walk_tree (&OMP_CLAUSE_REDUCTION_INIT (c), find_decl_expr, OMP_CLAUSE_REDUCTION_DECL_PLACEHOLDER (c), NULL) == NULL_TREE) omp_add_variable (pctx, OMP_CLAUSE_REDUCTION_DECL_PLACEHOLDER (c), GOVD_LOCAL | GOVD_SEEN); gimplify_omp_ctxp = pctx; push_gimplify_context (); OMP_CLAUSE_REDUCTION_GIMPLE_INIT (c) = NULL; OMP_CLAUSE_REDUCTION_GIMPLE_MERGE (c) = NULL; gimplify_and_add (OMP_CLAUSE_REDUCTION_INIT (c), &OMP_CLAUSE_REDUCTION_GIMPLE_INIT (c)); pop_gimplify_context (gimple_seq_first_stmt (OMP_CLAUSE_REDUCTION_GIMPLE_INIT (c))); push_gimplify_context (); gimplify_and_add (OMP_CLAUSE_REDUCTION_MERGE (c), &OMP_CLAUSE_REDUCTION_GIMPLE_MERGE (c)); pop_gimplify_context (gimple_seq_first_stmt (OMP_CLAUSE_REDUCTION_GIMPLE_MERGE (c))); OMP_CLAUSE_REDUCTION_INIT (c) = NULL_TREE; OMP_CLAUSE_REDUCTION_MERGE (c) = NULL_TREE; gimplify_omp_ctxp = outer_ctx; } else if (OMP_CLAUSE_CODE (c) == OMP_CLAUSE_LASTPRIVATE && OMP_CLAUSE_LASTPRIVATE_STMT (c)) { gimplify_omp_ctxp = ctx; push_gimplify_context (); if (TREE_CODE (OMP_CLAUSE_LASTPRIVATE_STMT (c)) != BIND_EXPR) { tree bind = build3 (BIND_EXPR, void_type_node, NULL, NULL, NULL); TREE_SIDE_EFFECTS (bind) = 1; BIND_EXPR_BODY (bind) = OMP_CLAUSE_LASTPRIVATE_STMT (c); OMP_CLAUSE_LASTPRIVATE_STMT (c) = bind; } gimplify_and_add (OMP_CLAUSE_LASTPRIVATE_STMT (c), &OMP_CLAUSE_LASTPRIVATE_GIMPLE_SEQ (c)); pop_gimplify_context (gimple_seq_first_stmt (OMP_CLAUSE_LASTPRIVATE_GIMPLE_SEQ (c))); OMP_CLAUSE_LASTPRIVATE_STMT (c) = NULL_TREE; gimplify_omp_ctxp = outer_ctx; } else if (OMP_CLAUSE_CODE (c) == OMP_CLAUSE_LINEAR && OMP_CLAUSE_LINEAR_STMT (c)) { gimplify_omp_ctxp = ctx; push_gimplify_context (); if (TREE_CODE (OMP_CLAUSE_LINEAR_STMT (c)) != BIND_EXPR) { tree bind = build3 (BIND_EXPR, void_type_node, NULL, NULL, NULL); TREE_SIDE_EFFECTS (bind) = 1; BIND_EXPR_BODY (bind) = OMP_CLAUSE_LINEAR_STMT (c); OMP_CLAUSE_LINEAR_STMT (c) = bind; } gimplify_and_add (OMP_CLAUSE_LINEAR_STMT (c), &OMP_CLAUSE_LINEAR_GIMPLE_SEQ (c)); pop_gimplify_context (gimple_seq_first_stmt (OMP_CLAUSE_LINEAR_GIMPLE_SEQ (c))); OMP_CLAUSE_LINEAR_STMT (c) = NULL_TREE; gimplify_omp_ctxp = outer_ctx; } if (notice_outer) goto do_notice; break; case OMP_CLAUSE_COPYIN: case OMP_CLAUSE_COPYPRIVATE: decl = OMP_CLAUSE_DECL (c); if (error_operand_p (decl)) { remove = true; break; } if (OMP_CLAUSE_CODE (c) == OMP_CLAUSE_COPYPRIVATE && !remove && !omp_check_private (ctx, decl, true)) { remove = true; if (is_global_var (decl)) { if (DECL_THREAD_LOCAL_P (decl)) remove = false; else if (DECL_HAS_VALUE_EXPR_P (decl)) { tree value = get_base_address (DECL_VALUE_EXPR (decl)); if (value && DECL_P (value) && DECL_THREAD_LOCAL_P (value)) remove = false; } } if (remove) error_at (OMP_CLAUSE_LOCATION (c), "copyprivate variable %qE is not threadprivate" " or private in outer context", DECL_NAME (decl)); } do_notice: if ((OMP_CLAUSE_CODE (c) == OMP_CLAUSE_REDUCTION || OMP_CLAUSE_CODE (c) == OMP_CLAUSE_FIRSTPRIVATE || OMP_CLAUSE_CODE (c) == OMP_CLAUSE_LASTPRIVATE) && outer_ctx && ((region_type & ORT_TASKLOOP) == ORT_TASKLOOP || (region_type == ORT_WORKSHARE && OMP_CLAUSE_CODE (c) == OMP_CLAUSE_REDUCTION && (OMP_CLAUSE_REDUCTION_INSCAN (c) || code == OMP_LOOP))) && (outer_ctx->region_type == ORT_COMBINED_PARALLEL || (code == OMP_LOOP && OMP_CLAUSE_CODE (c) == OMP_CLAUSE_REDUCTION && ((outer_ctx->region_type & ORT_COMBINED_TEAMS) == ORT_COMBINED_TEAMS)))) { splay_tree_node on = splay_tree_lookup (outer_ctx->variables, (splay_tree_key)decl); if (on == NULL || (on->value & GOVD_DATA_SHARE_CLASS) == 0) { if (OMP_CLAUSE_CODE (c) == OMP_CLAUSE_REDUCTION && TREE_CODE (OMP_CLAUSE_DECL (c)) == MEM_REF && (TREE_CODE (TREE_TYPE (decl)) == POINTER_TYPE || (TREE_CODE (TREE_TYPE (decl)) == REFERENCE_TYPE && (TREE_CODE (TREE_TYPE (TREE_TYPE (decl))) == POINTER_TYPE)))) omp_firstprivatize_variable (outer_ctx, decl); else { omp_add_variable (outer_ctx, decl, GOVD_SEEN | GOVD_SHARED); if (outer_ctx->outer_context) omp_notice_variable (outer_ctx->outer_context, decl, true); } } } if (outer_ctx) omp_notice_variable (outer_ctx, decl, true); if (check_non_private && (region_type == ORT_WORKSHARE || code == OMP_SCOPE) && (OMP_CLAUSE_CODE (c) != OMP_CLAUSE_REDUCTION || decl == OMP_CLAUSE_DECL (c) || (TREE_CODE (OMP_CLAUSE_DECL (c)) == MEM_REF && (TREE_CODE (TREE_OPERAND (OMP_CLAUSE_DECL (c), 0)) == ADDR_EXPR || (TREE_CODE (TREE_OPERAND (OMP_CLAUSE_DECL (c), 0)) == POINTER_PLUS_EXPR && (TREE_CODE (TREE_OPERAND (TREE_OPERAND (OMP_CLAUSE_DECL (c), 0), 0)) == ADDR_EXPR))))) && omp_check_private (ctx, decl, false)) { error ("%s variable %qE is private in outer context", check_non_private, DECL_NAME (decl)); remove = true; } break; case OMP_CLAUSE_DETACH: flags = GOVD_FIRSTPRIVATE | GOVD_SEEN; goto do_add; case OMP_CLAUSE_IF: if (OMP_CLAUSE_IF_MODIFIER (c) != ERROR_MARK && OMP_CLAUSE_IF_MODIFIER (c) != code) { const char *p[2]; for (int i = 0; i < 2; i++) switch (i ? OMP_CLAUSE_IF_MODIFIER (c) : code) { case VOID_CST: p[i] = "cancel"; break; case OMP_PARALLEL: p[i] = "parallel"; break; case OMP_SIMD: p[i] = "simd"; break; case OMP_TASK: p[i] = "task"; break; case OMP_TASKLOOP: p[i] = "taskloop"; break; case OMP_TARGET_DATA: p[i] = "target data"; break; case OMP_TARGET: p[i] = "target"; break; case OMP_TARGET_UPDATE: p[i] = "target update"; break; case OMP_TARGET_ENTER_DATA: p[i] = "target enter data"; break; case OMP_TARGET_EXIT_DATA: p[i] = "target exit data"; break; default: gcc_unreachable (); } error_at (OMP_CLAUSE_LOCATION (c), "expected %qs % clause modifier rather than %qs", p[0], p[1]); remove = true; } /* Fall through. */ case OMP_CLAUSE_FINAL: OMP_CLAUSE_OPERAND (c, 0) = gimple_boolify (OMP_CLAUSE_OPERAND (c, 0)); /* Fall through. */ case OMP_CLAUSE_NUM_TEAMS: if (OMP_CLAUSE_CODE (c) == OMP_CLAUSE_NUM_TEAMS && OMP_CLAUSE_NUM_TEAMS_LOWER_EXPR (c) && !is_gimple_min_invariant (OMP_CLAUSE_NUM_TEAMS_LOWER_EXPR (c))) { if (error_operand_p (OMP_CLAUSE_NUM_TEAMS_LOWER_EXPR (c))) { remove = true; break; } OMP_CLAUSE_NUM_TEAMS_LOWER_EXPR (c) = get_initialized_tmp_var (OMP_CLAUSE_NUM_TEAMS_LOWER_EXPR (c), pre_p, NULL, true); } /* Fall through. */ case OMP_CLAUSE_SCHEDULE: case OMP_CLAUSE_NUM_THREADS: case OMP_CLAUSE_THREAD_LIMIT: case OMP_CLAUSE_DIST_SCHEDULE: case OMP_CLAUSE_DEVICE: if (OMP_CLAUSE_CODE (c) == OMP_CLAUSE_DEVICE && OMP_CLAUSE_DEVICE_ANCESTOR (c)) { if (code != OMP_TARGET) { error_at (OMP_CLAUSE_LOCATION (c), "% clause with % is only " "allowed on % construct"); remove = true; break; } tree clauses = *orig_list_p; for (; clauses ; clauses = OMP_CLAUSE_CHAIN (clauses)) if (OMP_CLAUSE_CODE (clauses) != OMP_CLAUSE_DEVICE && OMP_CLAUSE_CODE (clauses) != OMP_CLAUSE_FIRSTPRIVATE && OMP_CLAUSE_CODE (clauses) != OMP_CLAUSE_PRIVATE && OMP_CLAUSE_CODE (clauses) != OMP_CLAUSE_DEFAULTMAP && OMP_CLAUSE_CODE (clauses) != OMP_CLAUSE_MAP ) { error_at (OMP_CLAUSE_LOCATION (c), "with %, only the %, " "%, %, %, " "and % clauses may appear on the " "construct"); remove = true; break; } } /* Fall through. */ case OMP_CLAUSE_PRIORITY: case OMP_CLAUSE_GRAINSIZE: case OMP_CLAUSE_NUM_TASKS: case OMP_CLAUSE_FILTER: case OMP_CLAUSE_HINT: case OMP_CLAUSE_ASYNC: case OMP_CLAUSE_WAIT: case OMP_CLAUSE_NUM_GANGS: case OMP_CLAUSE_NUM_WORKERS: case OMP_CLAUSE_VECTOR_LENGTH: case OMP_CLAUSE_WORKER: case OMP_CLAUSE_VECTOR: if (OMP_CLAUSE_OPERAND (c, 0) && !is_gimple_min_invariant (OMP_CLAUSE_OPERAND (c, 0))) { if (error_operand_p (OMP_CLAUSE_OPERAND (c, 0))) { remove = true; break; } /* All these clauses care about value, not a particular decl, so try to force it into a SSA_NAME or fresh temporary. */ OMP_CLAUSE_OPERAND (c, 0) = get_initialized_tmp_var (OMP_CLAUSE_OPERAND (c, 0), pre_p, NULL, true); } break; case OMP_CLAUSE_GANG: if (gimplify_expr (&OMP_CLAUSE_OPERAND (c, 0), pre_p, NULL, is_gimple_val, fb_rvalue) == GS_ERROR) remove = true; if (gimplify_expr (&OMP_CLAUSE_OPERAND (c, 1), pre_p, NULL, is_gimple_val, fb_rvalue) == GS_ERROR) remove = true; break; case OMP_CLAUSE_NOWAIT: nowait = 1; break; case OMP_CLAUSE_ORDERED: case OMP_CLAUSE_UNTIED: case OMP_CLAUSE_COLLAPSE: case OMP_CLAUSE_TILE: case OMP_CLAUSE_AUTO: case OMP_CLAUSE_SEQ: case OMP_CLAUSE_INDEPENDENT: case OMP_CLAUSE_MERGEABLE: case OMP_CLAUSE_PROC_BIND: case OMP_CLAUSE_SAFELEN: case OMP_CLAUSE_SIMDLEN: case OMP_CLAUSE_NOGROUP: case OMP_CLAUSE_THREADS: case OMP_CLAUSE_SIMD: case OMP_CLAUSE_BIND: case OMP_CLAUSE_IF_PRESENT: case OMP_CLAUSE_FINALIZE: break; case OMP_CLAUSE_ORDER: ctx->order_concurrent = true; break; case OMP_CLAUSE_DEFAULTMAP: enum gimplify_defaultmap_kind gdmkmin, gdmkmax; switch (OMP_CLAUSE_DEFAULTMAP_CATEGORY (c)) { case OMP_CLAUSE_DEFAULTMAP_CATEGORY_UNSPECIFIED: gdmkmin = GDMK_SCALAR; gdmkmax = GDMK_POINTER; break; case OMP_CLAUSE_DEFAULTMAP_CATEGORY_SCALAR: gdmkmin = GDMK_SCALAR; gdmkmax = GDMK_SCALAR_TARGET; break; case OMP_CLAUSE_DEFAULTMAP_CATEGORY_AGGREGATE: gdmkmin = gdmkmax = GDMK_AGGREGATE; break; case OMP_CLAUSE_DEFAULTMAP_CATEGORY_ALLOCATABLE: gdmkmin = gdmkmax = GDMK_ALLOCATABLE; break; case OMP_CLAUSE_DEFAULTMAP_CATEGORY_POINTER: gdmkmin = gdmkmax = GDMK_POINTER; break; default: gcc_unreachable (); } for (int gdmk = gdmkmin; gdmk <= gdmkmax; gdmk++) switch (OMP_CLAUSE_DEFAULTMAP_BEHAVIOR (c)) { case OMP_CLAUSE_DEFAULTMAP_ALLOC: ctx->defaultmap[gdmk] = GOVD_MAP | GOVD_MAP_ALLOC_ONLY; break; case OMP_CLAUSE_DEFAULTMAP_TO: ctx->defaultmap[gdmk] = GOVD_MAP | GOVD_MAP_TO_ONLY; break; case OMP_CLAUSE_DEFAULTMAP_FROM: ctx->defaultmap[gdmk] = GOVD_MAP | GOVD_MAP_FROM_ONLY; break; case OMP_CLAUSE_DEFAULTMAP_TOFROM: ctx->defaultmap[gdmk] = GOVD_MAP; break; case OMP_CLAUSE_DEFAULTMAP_FIRSTPRIVATE: ctx->defaultmap[gdmk] = GOVD_FIRSTPRIVATE; break; case OMP_CLAUSE_DEFAULTMAP_NONE: ctx->defaultmap[gdmk] = 0; break; case OMP_CLAUSE_DEFAULTMAP_DEFAULT: switch (gdmk) { case GDMK_SCALAR: ctx->defaultmap[gdmk] = GOVD_FIRSTPRIVATE; break; case GDMK_SCALAR_TARGET: ctx->defaultmap[gdmk] = (lang_GNU_Fortran () ? GOVD_MAP : GOVD_FIRSTPRIVATE); break; case GDMK_AGGREGATE: case GDMK_ALLOCATABLE: ctx->defaultmap[gdmk] = GOVD_MAP; break; case GDMK_POINTER: ctx->defaultmap[gdmk] = GOVD_MAP; if (!lang_GNU_Fortran ()) ctx->defaultmap[gdmk] |= GOVD_MAP_0LEN_ARRAY; break; default: gcc_unreachable (); } break; default: gcc_unreachable (); } break; case OMP_CLAUSE_ALIGNED: decl = OMP_CLAUSE_DECL (c); if (error_operand_p (decl)) { remove = true; break; } if (gimplify_expr (&OMP_CLAUSE_ALIGNED_ALIGNMENT (c), pre_p, NULL, is_gimple_val, fb_rvalue) == GS_ERROR) { remove = true; break; } if (!is_global_var (decl) && TREE_CODE (TREE_TYPE (decl)) == POINTER_TYPE) omp_add_variable (ctx, decl, GOVD_ALIGNED); break; case OMP_CLAUSE_NONTEMPORAL: decl = OMP_CLAUSE_DECL (c); if (error_operand_p (decl)) { remove = true; break; } omp_add_variable (ctx, decl, GOVD_NONTEMPORAL); break; case OMP_CLAUSE_ALLOCATE: decl = OMP_CLAUSE_DECL (c); if (error_operand_p (decl)) { remove = true; break; } if (gimplify_expr (&OMP_CLAUSE_ALLOCATE_ALLOCATOR (c), pre_p, NULL, is_gimple_val, fb_rvalue) == GS_ERROR) { remove = true; break; } else if (OMP_CLAUSE_ALLOCATE_ALLOCATOR (c) == NULL_TREE || (TREE_CODE (OMP_CLAUSE_ALLOCATE_ALLOCATOR (c)) == INTEGER_CST)) ; else if (code == OMP_TASKLOOP || !DECL_P (OMP_CLAUSE_ALLOCATE_ALLOCATOR (c))) OMP_CLAUSE_ALLOCATE_ALLOCATOR (c) = get_initialized_tmp_var (OMP_CLAUSE_ALLOCATE_ALLOCATOR (c), pre_p, NULL, false); break; case OMP_CLAUSE_DEFAULT: ctx->default_kind = OMP_CLAUSE_DEFAULT_KIND (c); break; case OMP_CLAUSE_INCLUSIVE: case OMP_CLAUSE_EXCLUSIVE: decl = OMP_CLAUSE_DECL (c); { splay_tree_node n = splay_tree_lookup (outer_ctx->variables, (splay_tree_key) decl); if (n == NULL || (n->value & GOVD_REDUCTION) == 0) { error_at (OMP_CLAUSE_LOCATION (c), "%qD specified in %qs clause but not in % " "% clause on the containing construct", decl, omp_clause_code_name[OMP_CLAUSE_CODE (c)]); remove = true; } else { n->value |= GOVD_REDUCTION_INSCAN; if (outer_ctx->region_type == ORT_SIMD && outer_ctx->outer_context && outer_ctx->outer_context->region_type == ORT_WORKSHARE) { n = splay_tree_lookup (outer_ctx->outer_context->variables, (splay_tree_key) decl); if (n && (n->value & GOVD_REDUCTION) != 0) n->value |= GOVD_REDUCTION_INSCAN; } } } break; case OMP_CLAUSE_NOHOST: default: gcc_unreachable (); } if (code == OACC_DATA && OMP_CLAUSE_CODE (c) == OMP_CLAUSE_MAP && (OMP_CLAUSE_MAP_KIND (c) == GOMP_MAP_FIRSTPRIVATE_POINTER || OMP_CLAUSE_MAP_KIND (c) == GOMP_MAP_FIRSTPRIVATE_REFERENCE)) remove = true; if (remove) *list_p = OMP_CLAUSE_CHAIN (c); else list_p = &OMP_CLAUSE_CHAIN (c); } ctx->clauses = *orig_list_p; gimplify_omp_ctxp = ctx; if (struct_seen_clause) delete struct_seen_clause; if (struct_map_to_clause) delete struct_map_to_clause; if (struct_deref_set) delete struct_deref_set; } /* Return true if DECL is a candidate for shared to firstprivate optimization. We only consider non-addressable scalars, not too big, and not references. */ static bool omp_shared_to_firstprivate_optimizable_decl_p (tree decl) { if (TREE_ADDRESSABLE (decl)) return false; tree type = TREE_TYPE (decl); if (!is_gimple_reg_type (type) || TREE_CODE (type) == REFERENCE_TYPE || TREE_ADDRESSABLE (type)) return false; /* Don't optimize too large decls, as each thread/task will have its own. */ HOST_WIDE_INT len = int_size_in_bytes (type); if (len == -1 || len > 4 * POINTER_SIZE / BITS_PER_UNIT) return false; if (omp_privatize_by_reference (decl)) return false; return true; } /* Helper function of omp_find_stores_op and gimplify_adjust_omp_clauses*. For omp_shared_to_firstprivate_optimizable_decl_p decl mark it as GOVD_WRITTEN in outer contexts. */ static void omp_mark_stores (struct gimplify_omp_ctx *ctx, tree decl) { for (; ctx; ctx = ctx->outer_context) { splay_tree_node n = splay_tree_lookup (ctx->variables, (splay_tree_key) decl); if (n == NULL) continue; else if (n->value & GOVD_SHARED) { n->value |= GOVD_WRITTEN; return; } else if (n->value & GOVD_DATA_SHARE_CLASS) return; } } /* Helper callback for walk_gimple_seq to discover possible stores to omp_shared_to_firstprivate_optimizable_decl_p decls and set GOVD_WRITTEN if they are GOVD_SHARED in some outer context for those. */ static tree omp_find_stores_op (tree *tp, int *walk_subtrees, void *data) { struct walk_stmt_info *wi = (struct walk_stmt_info *) data; *walk_subtrees = 0; if (!wi->is_lhs) return NULL_TREE; tree op = *tp; do { if (handled_component_p (op)) op = TREE_OPERAND (op, 0); else if ((TREE_CODE (op) == MEM_REF || TREE_CODE (op) == TARGET_MEM_REF) && TREE_CODE (TREE_OPERAND (op, 0)) == ADDR_EXPR) op = TREE_OPERAND (TREE_OPERAND (op, 0), 0); else break; } while (1); if (!DECL_P (op) || !omp_shared_to_firstprivate_optimizable_decl_p (op)) return NULL_TREE; omp_mark_stores (gimplify_omp_ctxp, op); return NULL_TREE; } /* Helper callback for walk_gimple_seq to discover possible stores to omp_shared_to_firstprivate_optimizable_decl_p decls and set GOVD_WRITTEN if they are GOVD_SHARED in some outer context for those. */ static tree omp_find_stores_stmt (gimple_stmt_iterator *gsi_p, bool *handled_ops_p, struct walk_stmt_info *wi) { gimple *stmt = gsi_stmt (*gsi_p); switch (gimple_code (stmt)) { /* Don't recurse on OpenMP constructs for which gimplify_adjust_omp_clauses already handled the bodies, except handle gimple_omp_for_pre_body. */ case GIMPLE_OMP_FOR: *handled_ops_p = true; if (gimple_omp_for_pre_body (stmt)) walk_gimple_seq (gimple_omp_for_pre_body (stmt), omp_find_stores_stmt, omp_find_stores_op, wi); break; case GIMPLE_OMP_PARALLEL: case GIMPLE_OMP_TASK: case GIMPLE_OMP_SECTIONS: case GIMPLE_OMP_SINGLE: case GIMPLE_OMP_SCOPE: case GIMPLE_OMP_TARGET: case GIMPLE_OMP_TEAMS: case GIMPLE_OMP_CRITICAL: *handled_ops_p = true; break; default: break; } return NULL_TREE; } struct gimplify_adjust_omp_clauses_data { tree *list_p; gimple_seq *pre_p; }; /* For all variables that were not actually used within the context, remove PRIVATE, SHARED, and FIRSTPRIVATE clauses. */ static int gimplify_adjust_omp_clauses_1 (splay_tree_node n, void *data) { tree *list_p = ((struct gimplify_adjust_omp_clauses_data *) data)->list_p; gimple_seq *pre_p = ((struct gimplify_adjust_omp_clauses_data *) data)->pre_p; tree decl = (tree) n->key; unsigned flags = n->value; enum omp_clause_code code; tree clause; bool private_debug; if (gimplify_omp_ctxp->region_type == ORT_COMBINED_PARALLEL && (flags & GOVD_LASTPRIVATE_CONDITIONAL) != 0) flags = GOVD_SHARED | GOVD_SEEN | GOVD_WRITTEN; if (flags & (GOVD_EXPLICIT | GOVD_LOCAL)) return 0; if ((flags & GOVD_SEEN) == 0) return 0; if ((flags & GOVD_MAP_HAS_ATTACHMENTS) != 0) return 0; if (flags & GOVD_DEBUG_PRIVATE) { gcc_assert ((flags & GOVD_DATA_SHARE_CLASS) == GOVD_SHARED); private_debug = true; } else if (flags & GOVD_MAP) private_debug = false; else private_debug = lang_hooks.decls.omp_private_debug_clause (decl, !!(flags & GOVD_SHARED)); if (private_debug) code = OMP_CLAUSE_PRIVATE; else if (flags & GOVD_MAP) { code = OMP_CLAUSE_MAP; if ((gimplify_omp_ctxp->region_type & ORT_ACC) == 0 && TYPE_ATOMIC (strip_array_types (TREE_TYPE (decl)))) { error ("%<_Atomic%> %qD in implicit % clause", decl); return 0; } if (VAR_P (decl) && DECL_IN_CONSTANT_POOL (decl) && !lookup_attribute ("omp declare target", DECL_ATTRIBUTES (decl))) { tree id = get_identifier ("omp declare target"); DECL_ATTRIBUTES (decl) = tree_cons (id, NULL_TREE, DECL_ATTRIBUTES (decl)); varpool_node *node = varpool_node::get (decl); if (node) { node->offloadable = 1; if (ENABLE_OFFLOADING) g->have_offload = true; } } } else if (flags & GOVD_SHARED) { if (is_global_var (decl)) { struct gimplify_omp_ctx *ctx = gimplify_omp_ctxp->outer_context; while (ctx != NULL) { splay_tree_node on = splay_tree_lookup (ctx->variables, (splay_tree_key) decl); if (on && (on->value & (GOVD_FIRSTPRIVATE | GOVD_LASTPRIVATE | GOVD_PRIVATE | GOVD_REDUCTION | GOVD_LINEAR | GOVD_MAP)) != 0) break; ctx = ctx->outer_context; } if (ctx == NULL) return 0; } code = OMP_CLAUSE_SHARED; /* Don't optimize shared into firstprivate for read-only vars on tasks with depend clause, we shouldn't try to copy them until the dependencies are satisfied. */ if (gimplify_omp_ctxp->has_depend) flags |= GOVD_WRITTEN; } else if (flags & GOVD_PRIVATE) code = OMP_CLAUSE_PRIVATE; else if (flags & GOVD_FIRSTPRIVATE) { code = OMP_CLAUSE_FIRSTPRIVATE; if ((gimplify_omp_ctxp->region_type & ORT_TARGET) && (gimplify_omp_ctxp->region_type & ORT_ACC) == 0 && TYPE_ATOMIC (strip_array_types (TREE_TYPE (decl)))) { error ("%<_Atomic%> %qD in implicit % clause on " "% construct", decl); return 0; } } else if (flags & GOVD_LASTPRIVATE) code = OMP_CLAUSE_LASTPRIVATE; else if (flags & (GOVD_ALIGNED | GOVD_NONTEMPORAL)) return 0; else if (flags & GOVD_CONDTEMP) { code = OMP_CLAUSE__CONDTEMP_; gimple_add_tmp_var (decl); } else gcc_unreachable (); if (((flags & GOVD_LASTPRIVATE) || (code == OMP_CLAUSE_SHARED && (flags & GOVD_WRITTEN))) && omp_shared_to_firstprivate_optimizable_decl_p (decl)) omp_mark_stores (gimplify_omp_ctxp->outer_context, decl); tree chain = *list_p; clause = build_omp_clause (input_location, code); OMP_CLAUSE_DECL (clause) = decl; OMP_CLAUSE_CHAIN (clause) = chain; if (private_debug) OMP_CLAUSE_PRIVATE_DEBUG (clause) = 1; else if (code == OMP_CLAUSE_PRIVATE && (flags & GOVD_PRIVATE_OUTER_REF)) OMP_CLAUSE_PRIVATE_OUTER_REF (clause) = 1; else if (code == OMP_CLAUSE_SHARED && (flags & GOVD_WRITTEN) == 0 && omp_shared_to_firstprivate_optimizable_decl_p (decl)) OMP_CLAUSE_SHARED_READONLY (clause) = 1; else if (code == OMP_CLAUSE_FIRSTPRIVATE && (flags & GOVD_EXPLICIT) == 0) OMP_CLAUSE_FIRSTPRIVATE_IMPLICIT (clause) = 1; else if (code == OMP_CLAUSE_MAP && (flags & GOVD_MAP_0LEN_ARRAY) != 0) { tree nc = build_omp_clause (input_location, OMP_CLAUSE_MAP); OMP_CLAUSE_DECL (nc) = decl; if (TREE_CODE (TREE_TYPE (decl)) == REFERENCE_TYPE && TREE_CODE (TREE_TYPE (TREE_TYPE (decl))) == POINTER_TYPE) OMP_CLAUSE_DECL (clause) = build_simple_mem_ref_loc (input_location, decl); OMP_CLAUSE_DECL (clause) = build2 (MEM_REF, char_type_node, OMP_CLAUSE_DECL (clause), build_int_cst (build_pointer_type (char_type_node), 0)); OMP_CLAUSE_SIZE (clause) = size_zero_node; OMP_CLAUSE_SIZE (nc) = size_zero_node; OMP_CLAUSE_SET_MAP_KIND (clause, GOMP_MAP_ALLOC); OMP_CLAUSE_MAP_MAYBE_ZERO_LENGTH_ARRAY_SECTION (clause) = 1; OMP_CLAUSE_SET_MAP_KIND (nc, GOMP_MAP_FIRSTPRIVATE_POINTER); OMP_CLAUSE_CHAIN (nc) = chain; OMP_CLAUSE_CHAIN (clause) = nc; struct gimplify_omp_ctx *ctx = gimplify_omp_ctxp; gimplify_omp_ctxp = ctx->outer_context; gimplify_expr (&TREE_OPERAND (OMP_CLAUSE_DECL (clause), 0), pre_p, NULL, is_gimple_val, fb_rvalue); gimplify_omp_ctxp = ctx; } else if (code == OMP_CLAUSE_MAP) { int kind; /* Not all combinations of these GOVD_MAP flags are actually valid. */ switch (flags & (GOVD_MAP_TO_ONLY | GOVD_MAP_FORCE | GOVD_MAP_FORCE_PRESENT | GOVD_MAP_ALLOC_ONLY | GOVD_MAP_FROM_ONLY)) { case 0: kind = GOMP_MAP_TOFROM; break; case GOVD_MAP_FORCE: kind = GOMP_MAP_TOFROM | GOMP_MAP_FLAG_FORCE; break; case GOVD_MAP_TO_ONLY: kind = GOMP_MAP_TO; break; case GOVD_MAP_FROM_ONLY: kind = GOMP_MAP_FROM; break; case GOVD_MAP_ALLOC_ONLY: kind = GOMP_MAP_ALLOC; break; case GOVD_MAP_TO_ONLY | GOVD_MAP_FORCE: kind = GOMP_MAP_TO | GOMP_MAP_FLAG_FORCE; break; case GOVD_MAP_FORCE_PRESENT: kind = GOMP_MAP_FORCE_PRESENT; break; default: gcc_unreachable (); } OMP_CLAUSE_SET_MAP_KIND (clause, kind); /* Setting of the implicit flag for the runtime is currently disabled for OpenACC. */ if ((gimplify_omp_ctxp->region_type & ORT_ACC) == 0) OMP_CLAUSE_MAP_RUNTIME_IMPLICIT_P (clause) = 1; if (DECL_SIZE (decl) && TREE_CODE (DECL_SIZE (decl)) != INTEGER_CST) { tree decl2 = DECL_VALUE_EXPR (decl); gcc_assert (TREE_CODE (decl2) == INDIRECT_REF); decl2 = TREE_OPERAND (decl2, 0); gcc_assert (DECL_P (decl2)); tree mem = build_simple_mem_ref (decl2); OMP_CLAUSE_DECL (clause) = mem; OMP_CLAUSE_SIZE (clause) = TYPE_SIZE_UNIT (TREE_TYPE (decl)); if (gimplify_omp_ctxp->outer_context) { struct gimplify_omp_ctx *ctx = gimplify_omp_ctxp->outer_context; omp_notice_variable (ctx, decl2, true); omp_notice_variable (ctx, OMP_CLAUSE_SIZE (clause), true); } tree nc = build_omp_clause (OMP_CLAUSE_LOCATION (clause), OMP_CLAUSE_MAP); OMP_CLAUSE_DECL (nc) = decl; OMP_CLAUSE_SIZE (nc) = size_zero_node; if (gimplify_omp_ctxp->target_firstprivatize_array_bases) OMP_CLAUSE_SET_MAP_KIND (nc, GOMP_MAP_FIRSTPRIVATE_POINTER); else OMP_CLAUSE_SET_MAP_KIND (nc, GOMP_MAP_POINTER); OMP_CLAUSE_CHAIN (nc) = OMP_CLAUSE_CHAIN (clause); OMP_CLAUSE_CHAIN (clause) = nc; } else if (gimplify_omp_ctxp->target_firstprivatize_array_bases && omp_privatize_by_reference (decl)) { OMP_CLAUSE_DECL (clause) = build_simple_mem_ref (decl); OMP_CLAUSE_SIZE (clause) = unshare_expr (TYPE_SIZE_UNIT (TREE_TYPE (TREE_TYPE (decl)))); struct gimplify_omp_ctx *ctx = gimplify_omp_ctxp; gimplify_omp_ctxp = ctx->outer_context; gimplify_expr (&OMP_CLAUSE_SIZE (clause), pre_p, NULL, is_gimple_val, fb_rvalue); gimplify_omp_ctxp = ctx; tree nc = build_omp_clause (OMP_CLAUSE_LOCATION (clause), OMP_CLAUSE_MAP); OMP_CLAUSE_DECL (nc) = decl; OMP_CLAUSE_SIZE (nc) = size_zero_node; OMP_CLAUSE_SET_MAP_KIND (nc, GOMP_MAP_FIRSTPRIVATE_REFERENCE); OMP_CLAUSE_CHAIN (nc) = OMP_CLAUSE_CHAIN (clause); OMP_CLAUSE_CHAIN (clause) = nc; } else OMP_CLAUSE_SIZE (clause) = DECL_SIZE_UNIT (decl); } if (code == OMP_CLAUSE_FIRSTPRIVATE && (flags & GOVD_LASTPRIVATE) != 0) { tree nc = build_omp_clause (input_location, OMP_CLAUSE_LASTPRIVATE); OMP_CLAUSE_DECL (nc) = decl; OMP_CLAUSE_LASTPRIVATE_FIRSTPRIVATE (nc) = 1; OMP_CLAUSE_CHAIN (nc) = chain; OMP_CLAUSE_CHAIN (clause) = nc; struct gimplify_omp_ctx *ctx = gimplify_omp_ctxp; gimplify_omp_ctxp = ctx->outer_context; lang_hooks.decls.omp_finish_clause (nc, pre_p, (ctx->region_type & ORT_ACC) != 0); gimplify_omp_ctxp = ctx; } *list_p = clause; struct gimplify_omp_ctx *ctx = gimplify_omp_ctxp; gimplify_omp_ctxp = ctx->outer_context; /* Don't call omp_finish_clause on implicitly added OMP_CLAUSE_PRIVATE in simd. Those are only added for the local vars inside of simd body and they don't need to be e.g. default constructible. */ if (code != OMP_CLAUSE_PRIVATE || ctx->region_type != ORT_SIMD) lang_hooks.decls.omp_finish_clause (clause, pre_p, (ctx->region_type & ORT_ACC) != 0); if (gimplify_omp_ctxp) for (; clause != chain; clause = OMP_CLAUSE_CHAIN (clause)) if (OMP_CLAUSE_CODE (clause) == OMP_CLAUSE_MAP && DECL_P (OMP_CLAUSE_SIZE (clause))) omp_notice_variable (gimplify_omp_ctxp, OMP_CLAUSE_SIZE (clause), true); gimplify_omp_ctxp = ctx; return 0; } static void gimplify_adjust_omp_clauses (gimple_seq *pre_p, gimple_seq body, tree *list_p, enum tree_code code) { struct gimplify_omp_ctx *ctx = gimplify_omp_ctxp; tree *orig_list_p = list_p; tree c, decl; bool has_inscan_reductions = false; if (body) { struct gimplify_omp_ctx *octx; for (octx = ctx; octx; octx = octx->outer_context) if ((octx->region_type & (ORT_PARALLEL | ORT_TASK | ORT_TEAMS)) != 0) break; if (octx) { struct walk_stmt_info wi; memset (&wi, 0, sizeof (wi)); walk_gimple_seq (body, omp_find_stores_stmt, omp_find_stores_op, &wi); } } if (ctx->add_safelen1) { /* If there are VLAs in the body of simd loop, prevent vectorization. */ gcc_assert (ctx->region_type == ORT_SIMD); c = build_omp_clause (UNKNOWN_LOCATION, OMP_CLAUSE_SAFELEN); OMP_CLAUSE_SAFELEN_EXPR (c) = integer_one_node; OMP_CLAUSE_CHAIN (c) = *list_p; *list_p = c; list_p = &OMP_CLAUSE_CHAIN (c); } if (ctx->region_type == ORT_WORKSHARE && ctx->outer_context && ctx->outer_context->region_type == ORT_COMBINED_PARALLEL) { for (c = ctx->outer_context->clauses; c; c = OMP_CLAUSE_CHAIN (c)) if (OMP_CLAUSE_CODE (c) == OMP_CLAUSE_LASTPRIVATE && OMP_CLAUSE_LASTPRIVATE_CONDITIONAL (c)) { decl = OMP_CLAUSE_DECL (c); splay_tree_node n = splay_tree_lookup (ctx->outer_context->variables, (splay_tree_key) decl); gcc_checking_assert (!splay_tree_lookup (ctx->variables, (splay_tree_key) decl)); omp_add_variable (ctx, decl, n->value); tree c2 = copy_node (c); OMP_CLAUSE_CHAIN (c2) = *list_p; *list_p = c2; if ((n->value & GOVD_FIRSTPRIVATE) == 0) continue; c2 = build_omp_clause (OMP_CLAUSE_LOCATION (c), OMP_CLAUSE_FIRSTPRIVATE); OMP_CLAUSE_DECL (c2) = decl; OMP_CLAUSE_CHAIN (c2) = *list_p; *list_p = c2; } } while ((c = *list_p) != NULL) { splay_tree_node n; bool remove = false; switch (OMP_CLAUSE_CODE (c)) { case OMP_CLAUSE_FIRSTPRIVATE: if ((ctx->region_type & ORT_TARGET) && (ctx->region_type & ORT_ACC) == 0 && TYPE_ATOMIC (strip_array_types (TREE_TYPE (OMP_CLAUSE_DECL (c))))) { error_at (OMP_CLAUSE_LOCATION (c), "%<_Atomic%> %qD in % clause on " "% construct", OMP_CLAUSE_DECL (c)); remove = true; break; } if (OMP_CLAUSE_FIRSTPRIVATE_IMPLICIT (c)) { decl = OMP_CLAUSE_DECL (c); n = splay_tree_lookup (ctx->variables, (splay_tree_key) decl); if ((n->value & GOVD_MAP) != 0) { remove = true; break; } OMP_CLAUSE_FIRSTPRIVATE_IMPLICIT_TARGET (c) = 0; OMP_CLAUSE_FIRSTPRIVATE_IMPLICIT (c) = 0; } /* FALLTHRU */ case OMP_CLAUSE_PRIVATE: case OMP_CLAUSE_SHARED: case OMP_CLAUSE_LINEAR: decl = OMP_CLAUSE_DECL (c); n = splay_tree_lookup (ctx->variables, (splay_tree_key) decl); remove = !(n->value & GOVD_SEEN); if ((n->value & GOVD_LASTPRIVATE_CONDITIONAL) != 0 && code == OMP_PARALLEL && OMP_CLAUSE_CODE (c) == OMP_CLAUSE_FIRSTPRIVATE) remove = true; if (! remove) { bool shared = OMP_CLAUSE_CODE (c) == OMP_CLAUSE_SHARED; if ((n->value & GOVD_DEBUG_PRIVATE) || lang_hooks.decls.omp_private_debug_clause (decl, shared)) { gcc_assert ((n->value & GOVD_DEBUG_PRIVATE) == 0 || ((n->value & GOVD_DATA_SHARE_CLASS) == GOVD_SHARED)); OMP_CLAUSE_SET_CODE (c, OMP_CLAUSE_PRIVATE); OMP_CLAUSE_PRIVATE_DEBUG (c) = 1; } if (OMP_CLAUSE_CODE (c) == OMP_CLAUSE_SHARED && ctx->has_depend && DECL_P (decl)) n->value |= GOVD_WRITTEN; if (OMP_CLAUSE_CODE (c) == OMP_CLAUSE_SHARED && (n->value & GOVD_WRITTEN) == 0 && DECL_P (decl) && omp_shared_to_firstprivate_optimizable_decl_p (decl)) OMP_CLAUSE_SHARED_READONLY (c) = 1; else if (DECL_P (decl) && ((OMP_CLAUSE_CODE (c) == OMP_CLAUSE_SHARED && (n->value & GOVD_WRITTEN) != 0) || (OMP_CLAUSE_CODE (c) == OMP_CLAUSE_LINEAR && !OMP_CLAUSE_LINEAR_NO_COPYOUT (c))) && omp_shared_to_firstprivate_optimizable_decl_p (decl)) omp_mark_stores (gimplify_omp_ctxp->outer_context, decl); } else n->value &= ~GOVD_EXPLICIT; break; case OMP_CLAUSE_LASTPRIVATE: /* Make sure OMP_CLAUSE_LASTPRIVATE_FIRSTPRIVATE is set to accurately reflect the presence of a FIRSTPRIVATE clause. */ decl = OMP_CLAUSE_DECL (c); n = splay_tree_lookup (ctx->variables, (splay_tree_key) decl); OMP_CLAUSE_LASTPRIVATE_FIRSTPRIVATE (c) = (n->value & GOVD_FIRSTPRIVATE) != 0; if (code == OMP_DISTRIBUTE && OMP_CLAUSE_LASTPRIVATE_FIRSTPRIVATE (c)) { remove = true; error_at (OMP_CLAUSE_LOCATION (c), "same variable used in % and " "% clauses on % " "construct"); } if (!remove && OMP_CLAUSE_CODE (c) == OMP_CLAUSE_LASTPRIVATE && DECL_P (decl) && omp_shared_to_firstprivate_optimizable_decl_p (decl)) omp_mark_stores (gimplify_omp_ctxp->outer_context, decl); if (OMP_CLAUSE_LASTPRIVATE_CONDITIONAL (c) && code == OMP_PARALLEL) remove = true; break; case OMP_CLAUSE_ALIGNED: decl = OMP_CLAUSE_DECL (c); if (!is_global_var (decl)) { n = splay_tree_lookup (ctx->variables, (splay_tree_key) decl); remove = n == NULL || !(n->value & GOVD_SEEN); if (!remove && TREE_CODE (TREE_TYPE (decl)) == POINTER_TYPE) { struct gimplify_omp_ctx *octx; if (n != NULL && (n->value & (GOVD_DATA_SHARE_CLASS & ~GOVD_FIRSTPRIVATE))) remove = true; else for (octx = ctx->outer_context; octx; octx = octx->outer_context) { n = splay_tree_lookup (octx->variables, (splay_tree_key) decl); if (n == NULL) continue; if (n->value & GOVD_LOCAL) break; /* We have to avoid assigning a shared variable to itself when trying to add __builtin_assume_aligned. */ if (n->value & GOVD_SHARED) { remove = true; break; } } } } else if (TREE_CODE (TREE_TYPE (decl)) == ARRAY_TYPE) { n = splay_tree_lookup (ctx->variables, (splay_tree_key) decl); if (n != NULL && (n->value & GOVD_DATA_SHARE_CLASS) != 0) remove = true; } break; case OMP_CLAUSE_HAS_DEVICE_ADDR: decl = OMP_CLAUSE_DECL (c); while (TREE_CODE (decl) == INDIRECT_REF || TREE_CODE (decl) == ARRAY_REF) decl = TREE_OPERAND (decl, 0); n = splay_tree_lookup (ctx->variables, (splay_tree_key) decl); remove = n == NULL || !(n->value & GOVD_SEEN); break; case OMP_CLAUSE_IS_DEVICE_PTR: case OMP_CLAUSE_NONTEMPORAL: decl = OMP_CLAUSE_DECL (c); n = splay_tree_lookup (ctx->variables, (splay_tree_key) decl); remove = n == NULL || !(n->value & GOVD_SEEN); break; case OMP_CLAUSE_MAP: if (code == OMP_TARGET_EXIT_DATA && OMP_CLAUSE_MAP_KIND (c) == GOMP_MAP_ALWAYS_POINTER) { remove = true; break; } decl = OMP_CLAUSE_DECL (c); /* Data clauses associated with reductions must be compatible with present_or_copy. Warn and adjust the clause if that is not the case. */ if (ctx->region_type == ORT_ACC_PARALLEL || ctx->region_type == ORT_ACC_SERIAL) { tree t = DECL_P (decl) ? decl : TREE_OPERAND (decl, 0); n = NULL; if (DECL_P (t)) n = splay_tree_lookup (ctx->variables, (splay_tree_key) t); if (n && (n->value & GOVD_REDUCTION)) { enum gomp_map_kind kind = OMP_CLAUSE_MAP_KIND (c); OMP_CLAUSE_MAP_IN_REDUCTION (c) = 1; if ((kind & GOMP_MAP_TOFROM) != GOMP_MAP_TOFROM && kind != GOMP_MAP_FORCE_PRESENT && kind != GOMP_MAP_POINTER) { warning_at (OMP_CLAUSE_LOCATION (c), 0, "incompatible data clause with reduction " "on %qE; promoting to %", DECL_NAME (t)); OMP_CLAUSE_SET_MAP_KIND (c, GOMP_MAP_TOFROM); } } } if (OMP_CLAUSE_MAP_KIND (c) == GOMP_MAP_STRUCT && (code == OMP_TARGET_EXIT_DATA || code == OACC_EXIT_DATA)) { remove = true; break; } if (!DECL_P (decl)) { if ((ctx->region_type & ORT_TARGET) != 0 && OMP_CLAUSE_MAP_KIND (c) == GOMP_MAP_FIRSTPRIVATE_POINTER) { if (TREE_CODE (decl) == INDIRECT_REF && TREE_CODE (TREE_OPERAND (decl, 0)) == COMPONENT_REF && (TREE_CODE (TREE_TYPE (TREE_OPERAND (decl, 0))) == REFERENCE_TYPE)) decl = TREE_OPERAND (decl, 0); if (TREE_CODE (decl) == COMPONENT_REF) { while (TREE_CODE (decl) == COMPONENT_REF) decl = TREE_OPERAND (decl, 0); if (DECL_P (decl)) { n = splay_tree_lookup (ctx->variables, (splay_tree_key) decl); if (!(n->value & GOVD_SEEN)) remove = true; } } } break; } n = splay_tree_lookup (ctx->variables, (splay_tree_key) decl); if ((ctx->region_type & ORT_TARGET) != 0 && !(n->value & GOVD_SEEN) && GOMP_MAP_ALWAYS_P (OMP_CLAUSE_MAP_KIND (c)) == 0 && (!is_global_var (decl) || !lookup_attribute ("omp declare target link", DECL_ATTRIBUTES (decl)))) { remove = true; /* For struct element mapping, if struct is never referenced in target block and none of the mapping has always modifier, remove all the struct element mappings, which immediately follow the GOMP_MAP_STRUCT map clause. */ if (OMP_CLAUSE_MAP_KIND (c) == GOMP_MAP_STRUCT) { HOST_WIDE_INT cnt = tree_to_shwi (OMP_CLAUSE_SIZE (c)); while (cnt--) OMP_CLAUSE_CHAIN (c) = OMP_CLAUSE_CHAIN (OMP_CLAUSE_CHAIN (c)); } } else if (DECL_SIZE (decl) && TREE_CODE (DECL_SIZE (decl)) != INTEGER_CST && OMP_CLAUSE_MAP_KIND (c) != GOMP_MAP_POINTER && OMP_CLAUSE_MAP_KIND (c) != GOMP_MAP_FIRSTPRIVATE_POINTER && (OMP_CLAUSE_MAP_KIND (c) != GOMP_MAP_FIRSTPRIVATE_REFERENCE)) { /* For GOMP_MAP_FORCE_DEVICEPTR, we'll never enter here, because for these, TREE_CODE (DECL_SIZE (decl)) will always be INTEGER_CST. */ gcc_assert (OMP_CLAUSE_MAP_KIND (c) != GOMP_MAP_FORCE_DEVICEPTR); tree decl2 = DECL_VALUE_EXPR (decl); gcc_assert (TREE_CODE (decl2) == INDIRECT_REF); decl2 = TREE_OPERAND (decl2, 0); gcc_assert (DECL_P (decl2)); tree mem = build_simple_mem_ref (decl2); OMP_CLAUSE_DECL (c) = mem; OMP_CLAUSE_SIZE (c) = TYPE_SIZE_UNIT (TREE_TYPE (decl)); if (ctx->outer_context) { omp_notice_variable (ctx->outer_context, decl2, true); omp_notice_variable (ctx->outer_context, OMP_CLAUSE_SIZE (c), true); } if (((ctx->region_type & ORT_TARGET) != 0 || !ctx->target_firstprivatize_array_bases) && ((n->value & GOVD_SEEN) == 0 || (n->value & (GOVD_PRIVATE | GOVD_FIRSTPRIVATE)) == 0)) { tree nc = build_omp_clause (OMP_CLAUSE_LOCATION (c), OMP_CLAUSE_MAP); OMP_CLAUSE_DECL (nc) = decl; OMP_CLAUSE_SIZE (nc) = size_zero_node; if (ctx->target_firstprivatize_array_bases) OMP_CLAUSE_SET_MAP_KIND (nc, GOMP_MAP_FIRSTPRIVATE_POINTER); else OMP_CLAUSE_SET_MAP_KIND (nc, GOMP_MAP_POINTER); OMP_CLAUSE_CHAIN (nc) = OMP_CLAUSE_CHAIN (c); OMP_CLAUSE_CHAIN (c) = nc; c = nc; } } else { if (OMP_CLAUSE_SIZE (c) == NULL_TREE) OMP_CLAUSE_SIZE (c) = DECL_SIZE_UNIT (decl); gcc_assert ((n->value & GOVD_SEEN) == 0 || ((n->value & (GOVD_PRIVATE | GOVD_FIRSTPRIVATE)) == 0)); } break; case OMP_CLAUSE_TO: case OMP_CLAUSE_FROM: case OMP_CLAUSE__CACHE_: decl = OMP_CLAUSE_DECL (c); if (!DECL_P (decl)) break; if (DECL_SIZE (decl) && TREE_CODE (DECL_SIZE (decl)) != INTEGER_CST) { tree decl2 = DECL_VALUE_EXPR (decl); gcc_assert (TREE_CODE (decl2) == INDIRECT_REF); decl2 = TREE_OPERAND (decl2, 0); gcc_assert (DECL_P (decl2)); tree mem = build_simple_mem_ref (decl2); OMP_CLAUSE_DECL (c) = mem; OMP_CLAUSE_SIZE (c) = TYPE_SIZE_UNIT (TREE_TYPE (decl)); if (ctx->outer_context) { omp_notice_variable (ctx->outer_context, decl2, true); omp_notice_variable (ctx->outer_context, OMP_CLAUSE_SIZE (c), true); } } else if (OMP_CLAUSE_SIZE (c) == NULL_TREE) OMP_CLAUSE_SIZE (c) = DECL_SIZE_UNIT (decl); break; case OMP_CLAUSE_REDUCTION: if (OMP_CLAUSE_REDUCTION_INSCAN (c)) { decl = OMP_CLAUSE_DECL (c); n = splay_tree_lookup (ctx->variables, (splay_tree_key) decl); if ((n->value & GOVD_REDUCTION_INSCAN) == 0) { remove = true; error_at (OMP_CLAUSE_LOCATION (c), "%qD specified in % % clause " "but not in % directive clause", decl); break; } has_inscan_reductions = true; } /* FALLTHRU */ case OMP_CLAUSE_IN_REDUCTION: case OMP_CLAUSE_TASK_REDUCTION: decl = OMP_CLAUSE_DECL (c); /* OpenACC reductions need a present_or_copy data clause. Add one if necessary. Emit error when the reduction is private. */ if (ctx->region_type == ORT_ACC_PARALLEL || ctx->region_type == ORT_ACC_SERIAL) { n = splay_tree_lookup (ctx->variables, (splay_tree_key) decl); if (n->value & (GOVD_PRIVATE | GOVD_FIRSTPRIVATE)) { remove = true; error_at (OMP_CLAUSE_LOCATION (c), "invalid private " "reduction on %qE", DECL_NAME (decl)); } else if ((n->value & GOVD_MAP) == 0) { tree next = OMP_CLAUSE_CHAIN (c); tree nc = build_omp_clause (UNKNOWN_LOCATION, OMP_CLAUSE_MAP); OMP_CLAUSE_SET_MAP_KIND (nc, GOMP_MAP_TOFROM); OMP_CLAUSE_DECL (nc) = decl; OMP_CLAUSE_CHAIN (c) = nc; lang_hooks.decls.omp_finish_clause (nc, pre_p, (ctx->region_type & ORT_ACC) != 0); while (1) { OMP_CLAUSE_MAP_IN_REDUCTION (nc) = 1; if (OMP_CLAUSE_CHAIN (nc) == NULL) break; nc = OMP_CLAUSE_CHAIN (nc); } OMP_CLAUSE_CHAIN (nc) = next; n->value |= GOVD_MAP; } } if (DECL_P (decl) && omp_shared_to_firstprivate_optimizable_decl_p (decl)) omp_mark_stores (gimplify_omp_ctxp->outer_context, decl); break; case OMP_CLAUSE_ALLOCATE: decl = OMP_CLAUSE_DECL (c); n = splay_tree_lookup (ctx->variables, (splay_tree_key) decl); if (n != NULL && !(n->value & GOVD_SEEN)) { if ((n->value & (GOVD_PRIVATE | GOVD_FIRSTPRIVATE | GOVD_LINEAR)) != 0 && (n->value & (GOVD_REDUCTION | GOVD_LASTPRIVATE)) == 0) remove = true; } if (!remove && OMP_CLAUSE_ALLOCATE_ALLOCATOR (c) && TREE_CODE (OMP_CLAUSE_ALLOCATE_ALLOCATOR (c)) != INTEGER_CST && ((ctx->region_type & (ORT_PARALLEL | ORT_TARGET)) != 0 || (ctx->region_type & ORT_TASKLOOP) == ORT_TASK || (ctx->region_type & ORT_HOST_TEAMS) == ORT_HOST_TEAMS)) { tree allocator = OMP_CLAUSE_ALLOCATE_ALLOCATOR (c); n = splay_tree_lookup (ctx->variables, (splay_tree_key) allocator); if (n == NULL) { enum omp_clause_default_kind default_kind = ctx->default_kind; ctx->default_kind = OMP_CLAUSE_DEFAULT_FIRSTPRIVATE; omp_notice_variable (ctx, OMP_CLAUSE_ALLOCATE_ALLOCATOR (c), true); ctx->default_kind = default_kind; } else omp_notice_variable (ctx, OMP_CLAUSE_ALLOCATE_ALLOCATOR (c), true); } break; case OMP_CLAUSE_COPYIN: case OMP_CLAUSE_COPYPRIVATE: case OMP_CLAUSE_IF: case OMP_CLAUSE_NUM_THREADS: case OMP_CLAUSE_NUM_TEAMS: case OMP_CLAUSE_THREAD_LIMIT: case OMP_CLAUSE_DIST_SCHEDULE: case OMP_CLAUSE_DEVICE: case OMP_CLAUSE_SCHEDULE: case OMP_CLAUSE_NOWAIT: case OMP_CLAUSE_ORDERED: case OMP_CLAUSE_DEFAULT: case OMP_CLAUSE_UNTIED: case OMP_CLAUSE_COLLAPSE: case OMP_CLAUSE_FINAL: case OMP_CLAUSE_MERGEABLE: case OMP_CLAUSE_PROC_BIND: case OMP_CLAUSE_SAFELEN: case OMP_CLAUSE_SIMDLEN: case OMP_CLAUSE_DEPEND: case OMP_CLAUSE_PRIORITY: case OMP_CLAUSE_GRAINSIZE: case OMP_CLAUSE_NUM_TASKS: case OMP_CLAUSE_NOGROUP: case OMP_CLAUSE_THREADS: case OMP_CLAUSE_SIMD: case OMP_CLAUSE_FILTER: case OMP_CLAUSE_HINT: case OMP_CLAUSE_DEFAULTMAP: case OMP_CLAUSE_ORDER: case OMP_CLAUSE_BIND: case OMP_CLAUSE_DETACH: case OMP_CLAUSE_USE_DEVICE_PTR: case OMP_CLAUSE_USE_DEVICE_ADDR: case OMP_CLAUSE_ASYNC: case OMP_CLAUSE_WAIT: case OMP_CLAUSE_INDEPENDENT: case OMP_CLAUSE_NUM_GANGS: case OMP_CLAUSE_NUM_WORKERS: case OMP_CLAUSE_VECTOR_LENGTH: case OMP_CLAUSE_GANG: case OMP_CLAUSE_WORKER: case OMP_CLAUSE_VECTOR: case OMP_CLAUSE_AUTO: case OMP_CLAUSE_SEQ: case OMP_CLAUSE_TILE: case OMP_CLAUSE_IF_PRESENT: case OMP_CLAUSE_FINALIZE: case OMP_CLAUSE_INCLUSIVE: case OMP_CLAUSE_EXCLUSIVE: break; case OMP_CLAUSE_NOHOST: default: gcc_unreachable (); } if (remove) *list_p = OMP_CLAUSE_CHAIN (c); else list_p = &OMP_CLAUSE_CHAIN (c); } /* Add in any implicit data sharing. */ struct gimplify_adjust_omp_clauses_data data; if ((gimplify_omp_ctxp->region_type & ORT_ACC) == 0) { /* OpenMP. Implicit clauses are added at the start of the clause list, but after any non-map clauses. */ tree *implicit_add_list_p = orig_list_p; while (*implicit_add_list_p && OMP_CLAUSE_CODE (*implicit_add_list_p) != OMP_CLAUSE_MAP) implicit_add_list_p = &OMP_CLAUSE_CHAIN (*implicit_add_list_p); data.list_p = implicit_add_list_p; } else /* OpenACC. */ data.list_p = list_p; data.pre_p = pre_p; splay_tree_foreach (ctx->variables, gimplify_adjust_omp_clauses_1, &data); if (has_inscan_reductions) for (c = *orig_list_p; c; c = OMP_CLAUSE_CHAIN (c)) if (OMP_CLAUSE_CODE (c) == OMP_CLAUSE_LINEAR && !OMP_CLAUSE_LINEAR_NO_COPYIN (c)) { error_at (OMP_CLAUSE_LOCATION (c), "% % clause used together with " "% clause for a variable other than loop " "iterator"); break; } gimplify_omp_ctxp = ctx->outer_context; delete_omp_context (ctx); } /* Return 0 if CONSTRUCTS selectors don't match the OpenMP context, -1 if unknown yet (simd is involved, won't be known until vectorization) and 1 if they do. If SCORES is non-NULL, it should point to an array of at least 2*NCONSTRUCTS+2 ints, and will be filled with the positions of the CONSTRUCTS (position -1 if it will never match) followed by number of constructs in the OpenMP context construct trait. If the score depends on whether it will be in a declare simd clone or not, the function returns 2 and there will be two sets of the scores, the first one for the case that it is not in a declare simd clone, the other that it is in a declare simd clone. */ int omp_construct_selector_matches (enum tree_code *constructs, int nconstructs, int *scores) { int matched = 0, cnt = 0; bool simd_seen = false; bool target_seen = false; int declare_simd_cnt = -1; auto_vec codes; for (struct gimplify_omp_ctx *ctx = gimplify_omp_ctxp; ctx;) { if (((ctx->region_type & ORT_PARALLEL) && ctx->code == OMP_PARALLEL) || ((ctx->region_type & (ORT_TARGET | ORT_IMPLICIT_TARGET | ORT_ACC)) == ORT_TARGET && ctx->code == OMP_TARGET) || ((ctx->region_type & ORT_TEAMS) && ctx->code == OMP_TEAMS) || (ctx->region_type == ORT_WORKSHARE && ctx->code == OMP_FOR) || (ctx->region_type == ORT_SIMD && ctx->code == OMP_SIMD && !omp_find_clause (ctx->clauses, OMP_CLAUSE_BIND))) { ++cnt; if (scores) codes.safe_push (ctx->code); else if (matched < nconstructs && ctx->code == constructs[matched]) { if (ctx->code == OMP_SIMD) { if (matched) return 0; simd_seen = true; } ++matched; } if (ctx->code == OMP_TARGET) { if (scores == NULL) return matched < nconstructs ? 0 : simd_seen ? -1 : 1; target_seen = true; break; } } else if (ctx->region_type == ORT_WORKSHARE && ctx->code == OMP_LOOP && ctx->outer_context && ctx->outer_context->region_type == ORT_COMBINED_PARALLEL && ctx->outer_context->outer_context && ctx->outer_context->outer_context->code == OMP_LOOP && ctx->outer_context->outer_context->distribute) ctx = ctx->outer_context->outer_context; ctx = ctx->outer_context; } if (!target_seen && lookup_attribute ("omp declare simd", DECL_ATTRIBUTES (current_function_decl))) { /* Declare simd is a maybe case, it is supposed to be added only to the omp-simd-clone.cc added clones and not to the base function. */ declare_simd_cnt = cnt++; if (scores) codes.safe_push (OMP_SIMD); else if (cnt == 0 && constructs[0] == OMP_SIMD) { gcc_assert (matched == 0); simd_seen = true; if (++matched == nconstructs) return -1; } } if (tree attr = lookup_attribute ("omp declare variant variant", DECL_ATTRIBUTES (current_function_decl))) { enum tree_code variant_constructs[5]; int variant_nconstructs = 0; if (!target_seen) variant_nconstructs = omp_constructor_traits_to_codes (TREE_VALUE (attr), variant_constructs); for (int i = 0; i < variant_nconstructs; i++) { ++cnt; if (scores) codes.safe_push (variant_constructs[i]); else if (matched < nconstructs && variant_constructs[i] == constructs[matched]) { if (variant_constructs[i] == OMP_SIMD) { if (matched) return 0; simd_seen = true; } ++matched; } } } if (!target_seen && lookup_attribute ("omp declare target block", DECL_ATTRIBUTES (current_function_decl))) { if (scores) codes.safe_push (OMP_TARGET); else if (matched < nconstructs && constructs[matched] == OMP_TARGET) ++matched; } if (scores) { for (int pass = 0; pass < (declare_simd_cnt == -1 ? 1 : 2); pass++) { int j = codes.length () - 1; for (int i = nconstructs - 1; i >= 0; i--) { while (j >= 0 && (pass != 0 || declare_simd_cnt != j) && constructs[i] != codes[j]) --j; if (pass == 0 && declare_simd_cnt != -1 && j > declare_simd_cnt) *scores++ = j - 1; else *scores++ = j; } *scores++ = ((pass == 0 && declare_simd_cnt != -1) ? codes.length () - 1 : codes.length ()); } return declare_simd_cnt == -1 ? 1 : 2; } if (matched == nconstructs) return simd_seen ? -1 : 1; return 0; } /* Gimplify OACC_CACHE. */ static void gimplify_oacc_cache (tree *expr_p, gimple_seq *pre_p) { tree expr = *expr_p; gimplify_scan_omp_clauses (&OACC_CACHE_CLAUSES (expr), pre_p, ORT_ACC, OACC_CACHE); gimplify_adjust_omp_clauses (pre_p, NULL, &OACC_CACHE_CLAUSES (expr), OACC_CACHE); /* TODO: Do something sensible with this information. */ *expr_p = NULL_TREE; } /* Helper function of gimplify_oacc_declare. The helper's purpose is to, if required, translate 'kind' in CLAUSE into an 'entry' kind and 'exit' kind. The entry kind will replace the one in CLAUSE, while the exit kind will be used in a new omp_clause and returned to the caller. */ static tree gimplify_oacc_declare_1 (tree clause) { HOST_WIDE_INT kind, new_op; bool ret = false; tree c = NULL; kind = OMP_CLAUSE_MAP_KIND (clause); switch (kind) { case GOMP_MAP_ALLOC: new_op = GOMP_MAP_RELEASE; ret = true; break; case GOMP_MAP_FROM: OMP_CLAUSE_SET_MAP_KIND (clause, GOMP_MAP_FORCE_ALLOC); new_op = GOMP_MAP_FROM; ret = true; break; case GOMP_MAP_TOFROM: OMP_CLAUSE_SET_MAP_KIND (clause, GOMP_MAP_TO); new_op = GOMP_MAP_FROM; ret = true; break; case GOMP_MAP_DEVICE_RESIDENT: case GOMP_MAP_FORCE_DEVICEPTR: case GOMP_MAP_FORCE_PRESENT: case GOMP_MAP_LINK: case GOMP_MAP_POINTER: case GOMP_MAP_TO: break; default: gcc_unreachable (); break; } if (ret) { c = build_omp_clause (OMP_CLAUSE_LOCATION (clause), OMP_CLAUSE_MAP); OMP_CLAUSE_SET_MAP_KIND (c, new_op); OMP_CLAUSE_DECL (c) = OMP_CLAUSE_DECL (clause); } return c; } /* Gimplify OACC_DECLARE. */ static void gimplify_oacc_declare (tree *expr_p, gimple_seq *pre_p) { tree expr = *expr_p; gomp_target *stmt; tree clauses, t, decl; clauses = OACC_DECLARE_CLAUSES (expr); gimplify_scan_omp_clauses (&clauses, pre_p, ORT_TARGET_DATA, OACC_DECLARE); gimplify_adjust_omp_clauses (pre_p, NULL, &clauses, OACC_DECLARE); for (t = clauses; t; t = OMP_CLAUSE_CHAIN (t)) { decl = OMP_CLAUSE_DECL (t); if (TREE_CODE (decl) == MEM_REF) decl = TREE_OPERAND (decl, 0); if (VAR_P (decl) && !is_oacc_declared (decl)) { tree attr = get_identifier ("oacc declare target"); DECL_ATTRIBUTES (decl) = tree_cons (attr, NULL_TREE, DECL_ATTRIBUTES (decl)); } if (VAR_P (decl) && !is_global_var (decl) && DECL_CONTEXT (decl) == current_function_decl) { tree c = gimplify_oacc_declare_1 (t); if (c) { if (oacc_declare_returns == NULL) oacc_declare_returns = new hash_map; oacc_declare_returns->put (decl, c); } } if (gimplify_omp_ctxp) omp_add_variable (gimplify_omp_ctxp, decl, GOVD_SEEN); } stmt = gimple_build_omp_target (NULL, GF_OMP_TARGET_KIND_OACC_DECLARE, clauses); gimplify_seq_add_stmt (pre_p, stmt); *expr_p = NULL_TREE; } /* Gimplify the contents of an OMP_PARALLEL statement. This involves gimplification of the body, as well as scanning the body for used variables. We need to do this scan now, because variable-sized decls will be decomposed during gimplification. */ static void gimplify_omp_parallel (tree *expr_p, gimple_seq *pre_p) { tree expr = *expr_p; gimple *g; gimple_seq body = NULL; gimplify_scan_omp_clauses (&OMP_PARALLEL_CLAUSES (expr), pre_p, OMP_PARALLEL_COMBINED (expr) ? ORT_COMBINED_PARALLEL : ORT_PARALLEL, OMP_PARALLEL); push_gimplify_context (); g = gimplify_and_return_first (OMP_PARALLEL_BODY (expr), &body); if (gimple_code (g) == GIMPLE_BIND) pop_gimplify_context (g); else pop_gimplify_context (NULL); gimplify_adjust_omp_clauses (pre_p, body, &OMP_PARALLEL_CLAUSES (expr), OMP_PARALLEL); g = gimple_build_omp_parallel (body, OMP_PARALLEL_CLAUSES (expr), NULL_TREE, NULL_TREE); if (OMP_PARALLEL_COMBINED (expr)) gimple_omp_set_subcode (g, GF_OMP_PARALLEL_COMBINED); gimplify_seq_add_stmt (pre_p, g); *expr_p = NULL_TREE; } /* Gimplify the contents of an OMP_TASK statement. This involves gimplification of the body, as well as scanning the body for used variables. We need to do this scan now, because variable-sized decls will be decomposed during gimplification. */ static void gimplify_omp_task (tree *expr_p, gimple_seq *pre_p) { tree expr = *expr_p; gimple *g; gimple_seq body = NULL; if (OMP_TASK_BODY (expr) == NULL_TREE) for (tree c = OMP_TASK_CLAUSES (expr); c; c = OMP_CLAUSE_CHAIN (c)) if (OMP_CLAUSE_CODE (c) == OMP_CLAUSE_DEPEND && OMP_CLAUSE_DEPEND_KIND (c) == OMP_CLAUSE_DEPEND_MUTEXINOUTSET) { error_at (OMP_CLAUSE_LOCATION (c), "% kind in % clause on a " "% construct"); break; } gimplify_scan_omp_clauses (&OMP_TASK_CLAUSES (expr), pre_p, omp_find_clause (OMP_TASK_CLAUSES (expr), OMP_CLAUSE_UNTIED) ? ORT_UNTIED_TASK : ORT_TASK, OMP_TASK); if (OMP_TASK_BODY (expr)) { push_gimplify_context (); g = gimplify_and_return_first (OMP_TASK_BODY (expr), &body); if (gimple_code (g) == GIMPLE_BIND) pop_gimplify_context (g); else pop_gimplify_context (NULL); } gimplify_adjust_omp_clauses (pre_p, body, &OMP_TASK_CLAUSES (expr), OMP_TASK); g = gimple_build_omp_task (body, OMP_TASK_CLAUSES (expr), NULL_TREE, NULL_TREE, NULL_TREE, NULL_TREE, NULL_TREE); if (OMP_TASK_BODY (expr) == NULL_TREE) gimple_omp_task_set_taskwait_p (g, true); gimplify_seq_add_stmt (pre_p, g); *expr_p = NULL_TREE; } /* Helper function for gimplify_omp_for. If *TP is not a gimple constant, force it into a temporary initialized in PRE_P and add firstprivate clause to ORIG_FOR_STMT. */ static void gimplify_omp_taskloop_expr (tree type, tree *tp, gimple_seq *pre_p, tree orig_for_stmt) { if (*tp == NULL || is_gimple_constant (*tp)) return; *tp = get_initialized_tmp_var (*tp, pre_p, NULL, false); /* Reference to pointer conversion is considered useless, but is significant for firstprivate clause. Force it here. */ if (type && TREE_CODE (type) == POINTER_TYPE && TREE_CODE (TREE_TYPE (*tp)) == REFERENCE_TYPE) { tree v = create_tmp_var (TYPE_MAIN_VARIANT (type)); tree m = build2 (INIT_EXPR, TREE_TYPE (v), v, *tp); gimplify_and_add (m, pre_p); *tp = v; } tree c = build_omp_clause (input_location, OMP_CLAUSE_FIRSTPRIVATE); OMP_CLAUSE_DECL (c) = *tp; OMP_CLAUSE_CHAIN (c) = OMP_FOR_CLAUSES (orig_for_stmt); OMP_FOR_CLAUSES (orig_for_stmt) = c; } /* Gimplify the gross structure of an OMP_FOR statement. */ static enum gimplify_status gimplify_omp_for (tree *expr_p, gimple_seq *pre_p) { tree for_stmt, orig_for_stmt, inner_for_stmt = NULL_TREE, decl, var, t; enum gimplify_status ret = GS_ALL_DONE; enum gimplify_status tret; gomp_for *gfor; gimple_seq for_body, for_pre_body; int i; bitmap has_decl_expr = NULL; enum omp_region_type ort = ORT_WORKSHARE; bool openacc = TREE_CODE (*expr_p) == OACC_LOOP; orig_for_stmt = for_stmt = *expr_p; bool loop_p = (omp_find_clause (OMP_FOR_CLAUSES (for_stmt), OMP_CLAUSE_BIND) != NULL_TREE); if (OMP_FOR_INIT (for_stmt) == NULL_TREE) { tree *data[4] = { NULL, NULL, NULL, NULL }; gcc_assert (TREE_CODE (for_stmt) != OACC_LOOP); inner_for_stmt = walk_tree (&OMP_FOR_BODY (for_stmt), find_combined_omp_for, data, NULL); if (inner_for_stmt == NULL_TREE) { gcc_assert (seen_error ()); *expr_p = NULL_TREE; return GS_ERROR; } if (data[2] && OMP_FOR_PRE_BODY (*data[2])) { append_to_statement_list_force (OMP_FOR_PRE_BODY (*data[2]), &OMP_FOR_PRE_BODY (for_stmt)); OMP_FOR_PRE_BODY (*data[2]) = NULL_TREE; } if (OMP_FOR_PRE_BODY (inner_for_stmt)) { append_to_statement_list_force (OMP_FOR_PRE_BODY (inner_for_stmt), &OMP_FOR_PRE_BODY (for_stmt)); OMP_FOR_PRE_BODY (inner_for_stmt) = NULL_TREE; } if (data[0]) { /* We have some statements or variable declarations in between the composite construct directives. Move them around the inner_for_stmt. */ data[0] = expr_p; for (i = 0; i < 3; i++) if (data[i]) { tree t = *data[i]; if (i < 2 && data[i + 1] == &OMP_BODY (t)) data[i + 1] = data[i]; *data[i] = OMP_BODY (t); tree body = build3 (BIND_EXPR, void_type_node, NULL_TREE, NULL_TREE, make_node (BLOCK)); OMP_BODY (t) = body; append_to_statement_list_force (inner_for_stmt, &BIND_EXPR_BODY (body)); *data[3] = t; data[3] = tsi_stmt_ptr (tsi_start (BIND_EXPR_BODY (body))); gcc_assert (*data[3] == inner_for_stmt); } return GS_OK; } for (i = 0; i < TREE_VEC_LENGTH (OMP_FOR_INIT (inner_for_stmt)); i++) if (!loop_p && OMP_FOR_ORIG_DECLS (inner_for_stmt) && TREE_CODE (TREE_VEC_ELT (OMP_FOR_ORIG_DECLS (inner_for_stmt), i)) == TREE_LIST && TREE_PURPOSE (TREE_VEC_ELT (OMP_FOR_ORIG_DECLS (inner_for_stmt), i))) { tree orig = TREE_VEC_ELT (OMP_FOR_ORIG_DECLS (inner_for_stmt), i); /* Class iterators aren't allowed on OMP_SIMD, so the only case we need to solve is distribute parallel for. They are allowed on the loop construct, but that is already handled in gimplify_omp_loop. */ gcc_assert (TREE_CODE (inner_for_stmt) == OMP_FOR && TREE_CODE (for_stmt) == OMP_DISTRIBUTE && data[1]); tree orig_decl = TREE_PURPOSE (orig); tree last = TREE_VALUE (orig); tree *pc; for (pc = &OMP_FOR_CLAUSES (inner_for_stmt); *pc; pc = &OMP_CLAUSE_CHAIN (*pc)) if ((OMP_CLAUSE_CODE (*pc) == OMP_CLAUSE_PRIVATE || OMP_CLAUSE_CODE (*pc) == OMP_CLAUSE_LASTPRIVATE) && OMP_CLAUSE_DECL (*pc) == orig_decl) break; if (*pc == NULL_TREE) { tree *spc; for (spc = &OMP_PARALLEL_CLAUSES (*data[1]); *spc; spc = &OMP_CLAUSE_CHAIN (*spc)) if (OMP_CLAUSE_CODE (*spc) == OMP_CLAUSE_PRIVATE && OMP_CLAUSE_DECL (*spc) == orig_decl) break; if (*spc) { tree c = *spc; *spc = OMP_CLAUSE_CHAIN (c); OMP_CLAUSE_CHAIN (c) = NULL_TREE; *pc = c; } } if (*pc == NULL_TREE) ; else if (OMP_CLAUSE_CODE (*pc) == OMP_CLAUSE_PRIVATE) { /* private clause will appear only on inner_for_stmt. Change it into firstprivate, and add private clause on for_stmt. */ tree c = copy_node (*pc); OMP_CLAUSE_CHAIN (c) = OMP_FOR_CLAUSES (for_stmt); OMP_FOR_CLAUSES (for_stmt) = c; OMP_CLAUSE_CODE (*pc) = OMP_CLAUSE_FIRSTPRIVATE; lang_hooks.decls.omp_finish_clause (*pc, pre_p, openacc); } else { /* lastprivate clause will appear on both inner_for_stmt and for_stmt. Add firstprivate clause to inner_for_stmt. */ tree c = build_omp_clause (OMP_CLAUSE_LOCATION (*pc), OMP_CLAUSE_FIRSTPRIVATE); OMP_CLAUSE_DECL (c) = OMP_CLAUSE_DECL (*pc); OMP_CLAUSE_CHAIN (c) = *pc; *pc = c; lang_hooks.decls.omp_finish_clause (*pc, pre_p, openacc); } tree c = build_omp_clause (UNKNOWN_LOCATION, OMP_CLAUSE_FIRSTPRIVATE); OMP_CLAUSE_DECL (c) = last; OMP_CLAUSE_CHAIN (c) = OMP_PARALLEL_CLAUSES (*data[1]); OMP_PARALLEL_CLAUSES (*data[1]) = c; c = build_omp_clause (UNKNOWN_LOCATION, *pc ? OMP_CLAUSE_SHARED : OMP_CLAUSE_FIRSTPRIVATE); OMP_CLAUSE_DECL (c) = orig_decl; OMP_CLAUSE_CHAIN (c) = OMP_PARALLEL_CLAUSES (*data[1]); OMP_PARALLEL_CLAUSES (*data[1]) = c; } /* Similarly, take care of C++ range for temporaries, those should be firstprivate on OMP_PARALLEL if any. */ if (data[1]) for (i = 0; i < TREE_VEC_LENGTH (OMP_FOR_INIT (inner_for_stmt)); i++) if (OMP_FOR_ORIG_DECLS (inner_for_stmt) && TREE_CODE (TREE_VEC_ELT (OMP_FOR_ORIG_DECLS (inner_for_stmt), i)) == TREE_LIST && TREE_CHAIN (TREE_VEC_ELT (OMP_FOR_ORIG_DECLS (inner_for_stmt), i))) { tree orig = TREE_VEC_ELT (OMP_FOR_ORIG_DECLS (inner_for_stmt), i); tree v = TREE_CHAIN (orig); tree c = build_omp_clause (UNKNOWN_LOCATION, OMP_CLAUSE_FIRSTPRIVATE); /* First add firstprivate clause for the __for_end artificial decl. */ OMP_CLAUSE_DECL (c) = TREE_VEC_ELT (v, 1); if (TREE_CODE (TREE_TYPE (OMP_CLAUSE_DECL (c))) == REFERENCE_TYPE) OMP_CLAUSE_FIRSTPRIVATE_NO_REFERENCE (c) = 1; OMP_CLAUSE_CHAIN (c) = OMP_PARALLEL_CLAUSES (*data[1]); OMP_PARALLEL_CLAUSES (*data[1]) = c; if (TREE_VEC_ELT (v, 0)) { /* And now the same for __for_range artificial decl if it exists. */ c = build_omp_clause (UNKNOWN_LOCATION, OMP_CLAUSE_FIRSTPRIVATE); OMP_CLAUSE_DECL (c) = TREE_VEC_ELT (v, 0); if (TREE_CODE (TREE_TYPE (OMP_CLAUSE_DECL (c))) == REFERENCE_TYPE) OMP_CLAUSE_FIRSTPRIVATE_NO_REFERENCE (c) = 1; OMP_CLAUSE_CHAIN (c) = OMP_PARALLEL_CLAUSES (*data[1]); OMP_PARALLEL_CLAUSES (*data[1]) = c; } } } switch (TREE_CODE (for_stmt)) { case OMP_FOR: if (OMP_FOR_NON_RECTANGULAR (inner_for_stmt ? inner_for_stmt : for_stmt)) { if (omp_find_clause (OMP_FOR_CLAUSES (for_stmt), OMP_CLAUSE_SCHEDULE)) error_at (EXPR_LOCATION (for_stmt), "%qs clause may not appear on non-rectangular %qs", "schedule", "for"); if (omp_find_clause (OMP_FOR_CLAUSES (for_stmt), OMP_CLAUSE_ORDERED)) error_at (EXPR_LOCATION (for_stmt), "%qs clause may not appear on non-rectangular %qs", "ordered", "for"); } break; case OMP_DISTRIBUTE: if (OMP_FOR_NON_RECTANGULAR (inner_for_stmt ? inner_for_stmt : for_stmt) && omp_find_clause (OMP_FOR_CLAUSES (for_stmt), OMP_CLAUSE_DIST_SCHEDULE)) error_at (EXPR_LOCATION (for_stmt), "%qs clause may not appear on non-rectangular %qs", "dist_schedule", "distribute"); break; case OACC_LOOP: ort = ORT_ACC; break; case OMP_TASKLOOP: if (omp_find_clause (OMP_FOR_CLAUSES (for_stmt), OMP_CLAUSE_UNTIED)) ort = ORT_UNTIED_TASKLOOP; else ort = ORT_TASKLOOP; break; case OMP_SIMD: ort = ORT_SIMD; break; default: gcc_unreachable (); } /* Set OMP_CLAUSE_LINEAR_NO_COPYIN flag on explicit linear clause for the IV. */ if (ort == ORT_SIMD && TREE_VEC_LENGTH (OMP_FOR_INIT (for_stmt)) == 1) { t = TREE_VEC_ELT (OMP_FOR_INIT (for_stmt), 0); gcc_assert (TREE_CODE (t) == MODIFY_EXPR); decl = TREE_OPERAND (t, 0); for (tree c = OMP_FOR_CLAUSES (for_stmt); c; c = OMP_CLAUSE_CHAIN (c)) if (OMP_CLAUSE_CODE (c) == OMP_CLAUSE_LINEAR && OMP_CLAUSE_DECL (c) == decl) { OMP_CLAUSE_LINEAR_NO_COPYIN (c) = 1; break; } } if (TREE_CODE (for_stmt) != OMP_TASKLOOP) gimplify_scan_omp_clauses (&OMP_FOR_CLAUSES (for_stmt), pre_p, ort, loop_p && TREE_CODE (for_stmt) != OMP_SIMD ? OMP_LOOP : TREE_CODE (for_stmt)); if (TREE_CODE (for_stmt) == OMP_DISTRIBUTE) gimplify_omp_ctxp->distribute = true; /* Handle OMP_FOR_INIT. */ for_pre_body = NULL; if ((ort == ORT_SIMD || (inner_for_stmt && TREE_CODE (inner_for_stmt) == OMP_SIMD)) && OMP_FOR_PRE_BODY (for_stmt)) { has_decl_expr = BITMAP_ALLOC (NULL); if (TREE_CODE (OMP_FOR_PRE_BODY (for_stmt)) == DECL_EXPR && TREE_CODE (DECL_EXPR_DECL (OMP_FOR_PRE_BODY (for_stmt))) == VAR_DECL) { t = OMP_FOR_PRE_BODY (for_stmt); bitmap_set_bit (has_decl_expr, DECL_UID (DECL_EXPR_DECL (t))); } else if (TREE_CODE (OMP_FOR_PRE_BODY (for_stmt)) == STATEMENT_LIST) { tree_stmt_iterator si; for (si = tsi_start (OMP_FOR_PRE_BODY (for_stmt)); !tsi_end_p (si); tsi_next (&si)) { t = tsi_stmt (si); if (TREE_CODE (t) == DECL_EXPR && TREE_CODE (DECL_EXPR_DECL (t)) == VAR_DECL) bitmap_set_bit (has_decl_expr, DECL_UID (DECL_EXPR_DECL (t))); } } } if (OMP_FOR_PRE_BODY (for_stmt)) { if (TREE_CODE (for_stmt) != OMP_TASKLOOP || gimplify_omp_ctxp) gimplify_and_add (OMP_FOR_PRE_BODY (for_stmt), &for_pre_body); else { struct gimplify_omp_ctx ctx; memset (&ctx, 0, sizeof (ctx)); ctx.region_type = ORT_NONE; gimplify_omp_ctxp = &ctx; gimplify_and_add (OMP_FOR_PRE_BODY (for_stmt), &for_pre_body); gimplify_omp_ctxp = NULL; } } OMP_FOR_PRE_BODY (for_stmt) = NULL_TREE; if (OMP_FOR_INIT (for_stmt) == NULL_TREE) for_stmt = inner_for_stmt; /* For taskloop, need to gimplify the start, end and step before the taskloop, outside of the taskloop omp context. */ if (TREE_CODE (orig_for_stmt) == OMP_TASKLOOP) { for (i = 0; i < TREE_VEC_LENGTH (OMP_FOR_INIT (for_stmt)); i++) { t = TREE_VEC_ELT (OMP_FOR_INIT (for_stmt), i); gimple_seq *for_pre_p = (gimple_seq_empty_p (for_pre_body) ? pre_p : &for_pre_body); tree type = TREE_TYPE (TREE_OPERAND (t, 0)); if (TREE_CODE (TREE_OPERAND (t, 1)) == TREE_VEC) { tree v = TREE_OPERAND (t, 1); gimplify_omp_taskloop_expr (type, &TREE_VEC_ELT (v, 1), for_pre_p, orig_for_stmt); gimplify_omp_taskloop_expr (type, &TREE_VEC_ELT (v, 2), for_pre_p, orig_for_stmt); } else gimplify_omp_taskloop_expr (type, &TREE_OPERAND (t, 1), for_pre_p, orig_for_stmt); /* Handle OMP_FOR_COND. */ t = TREE_VEC_ELT (OMP_FOR_COND (for_stmt), i); if (TREE_CODE (TREE_OPERAND (t, 1)) == TREE_VEC) { tree v = TREE_OPERAND (t, 1); gimplify_omp_taskloop_expr (type, &TREE_VEC_ELT (v, 1), for_pre_p, orig_for_stmt); gimplify_omp_taskloop_expr (type, &TREE_VEC_ELT (v, 2), for_pre_p, orig_for_stmt); } else gimplify_omp_taskloop_expr (type, &TREE_OPERAND (t, 1), for_pre_p, orig_for_stmt); /* Handle OMP_FOR_INCR. */ t = TREE_VEC_ELT (OMP_FOR_INCR (for_stmt), i); if (TREE_CODE (t) == MODIFY_EXPR) { decl = TREE_OPERAND (t, 0); t = TREE_OPERAND (t, 1); tree *tp = &TREE_OPERAND (t, 1); if (TREE_CODE (t) == PLUS_EXPR && *tp == decl) tp = &TREE_OPERAND (t, 0); gimplify_omp_taskloop_expr (NULL_TREE, tp, for_pre_p, orig_for_stmt); } } gimplify_scan_omp_clauses (&OMP_FOR_CLAUSES (orig_for_stmt), pre_p, ort, OMP_TASKLOOP); } if (orig_for_stmt != for_stmt) gimplify_omp_ctxp->combined_loop = true; for_body = NULL; gcc_assert (TREE_VEC_LENGTH (OMP_FOR_INIT (for_stmt)) == TREE_VEC_LENGTH (OMP_FOR_COND (for_stmt))); gcc_assert (TREE_VEC_LENGTH (OMP_FOR_INIT (for_stmt)) == TREE_VEC_LENGTH (OMP_FOR_INCR (for_stmt))); tree c = omp_find_clause (OMP_FOR_CLAUSES (for_stmt), OMP_CLAUSE_ORDERED); bool is_doacross = false; if (c && OMP_CLAUSE_ORDERED_EXPR (c)) { is_doacross = true; gimplify_omp_ctxp->loop_iter_var.create (TREE_VEC_LENGTH (OMP_FOR_INIT (for_stmt)) * 2); } int collapse = 1, tile = 0; c = omp_find_clause (OMP_FOR_CLAUSES (for_stmt), OMP_CLAUSE_COLLAPSE); if (c) collapse = tree_to_shwi (OMP_CLAUSE_COLLAPSE_EXPR (c)); c = omp_find_clause (OMP_FOR_CLAUSES (for_stmt), OMP_CLAUSE_TILE); if (c) tile = list_length (OMP_CLAUSE_TILE_LIST (c)); c = omp_find_clause (OMP_FOR_CLAUSES (for_stmt), OMP_CLAUSE_ALLOCATE); hash_set *allocate_uids = NULL; if (c) { allocate_uids = new hash_set; for (; c; c = OMP_CLAUSE_CHAIN (c)) if (OMP_CLAUSE_CODE (c) == OMP_CLAUSE_ALLOCATE) allocate_uids->add (OMP_CLAUSE_DECL (c)); } for (i = 0; i < TREE_VEC_LENGTH (OMP_FOR_INIT (for_stmt)); i++) { t = TREE_VEC_ELT (OMP_FOR_INIT (for_stmt), i); gcc_assert (TREE_CODE (t) == MODIFY_EXPR); decl = TREE_OPERAND (t, 0); gcc_assert (DECL_P (decl)); gcc_assert (INTEGRAL_TYPE_P (TREE_TYPE (decl)) || POINTER_TYPE_P (TREE_TYPE (decl))); if (is_doacross) { if (TREE_CODE (for_stmt) == OMP_FOR && OMP_FOR_ORIG_DECLS (for_stmt)) { tree orig_decl = TREE_VEC_ELT (OMP_FOR_ORIG_DECLS (for_stmt), i); if (TREE_CODE (orig_decl) == TREE_LIST) { orig_decl = TREE_PURPOSE (orig_decl); if (!orig_decl) orig_decl = decl; } gimplify_omp_ctxp->loop_iter_var.quick_push (orig_decl); } else gimplify_omp_ctxp->loop_iter_var.quick_push (decl); gimplify_omp_ctxp->loop_iter_var.quick_push (decl); } if (for_stmt == orig_for_stmt) { tree orig_decl = decl; if (OMP_FOR_ORIG_DECLS (for_stmt)) { tree orig_decl = TREE_VEC_ELT (OMP_FOR_ORIG_DECLS (for_stmt), i); if (TREE_CODE (orig_decl) == TREE_LIST) { orig_decl = TREE_PURPOSE (orig_decl); if (!orig_decl) orig_decl = decl; } } if (is_global_var (orig_decl) && DECL_THREAD_LOCAL_P (orig_decl)) error_at (EXPR_LOCATION (for_stmt), "threadprivate iteration variable %qD", orig_decl); } /* Make sure the iteration variable is private. */ tree c = NULL_TREE; tree c2 = NULL_TREE; if (orig_for_stmt != for_stmt) { /* Preserve this information until we gimplify the inner simd. */ if (has_decl_expr && bitmap_bit_p (has_decl_expr, DECL_UID (decl))) TREE_PRIVATE (t) = 1; } else if (ort == ORT_SIMD) { splay_tree_node n = splay_tree_lookup (gimplify_omp_ctxp->variables, (splay_tree_key) decl); omp_is_private (gimplify_omp_ctxp, decl, 1 + (TREE_VEC_LENGTH (OMP_FOR_INIT (for_stmt)) != 1)); if (n != NULL && (n->value & GOVD_DATA_SHARE_CLASS) != 0) { omp_notice_variable (gimplify_omp_ctxp, decl, true); if (n->value & GOVD_LASTPRIVATE_CONDITIONAL) for (tree c3 = omp_find_clause (OMP_FOR_CLAUSES (for_stmt), OMP_CLAUSE_LASTPRIVATE); c3; c3 = omp_find_clause (OMP_CLAUSE_CHAIN (c3), OMP_CLAUSE_LASTPRIVATE)) if (OMP_CLAUSE_DECL (c3) == decl) { warning_at (OMP_CLAUSE_LOCATION (c3), 0, "conditional % on loop " "iterator %qD ignored", decl); OMP_CLAUSE_LASTPRIVATE_CONDITIONAL (c3) = 0; n->value &= ~GOVD_LASTPRIVATE_CONDITIONAL; } } else if (TREE_VEC_LENGTH (OMP_FOR_INIT (for_stmt)) == 1 && !loop_p) { c = build_omp_clause (input_location, OMP_CLAUSE_LINEAR); OMP_CLAUSE_LINEAR_NO_COPYIN (c) = 1; unsigned int flags = GOVD_LINEAR | GOVD_EXPLICIT | GOVD_SEEN; if ((has_decl_expr && bitmap_bit_p (has_decl_expr, DECL_UID (decl))) || TREE_PRIVATE (t)) { OMP_CLAUSE_LINEAR_NO_COPYOUT (c) = 1; flags |= GOVD_LINEAR_LASTPRIVATE_NO_OUTER; } struct gimplify_omp_ctx *outer = gimplify_omp_ctxp->outer_context; if (outer && !OMP_CLAUSE_LINEAR_NO_COPYOUT (c)) { if (outer->region_type == ORT_WORKSHARE && outer->combined_loop) { n = splay_tree_lookup (outer->variables, (splay_tree_key)decl); if (n != NULL && (n->value & GOVD_LOCAL) != 0) { OMP_CLAUSE_LINEAR_NO_COPYOUT (c) = 1; flags |= GOVD_LINEAR_LASTPRIVATE_NO_OUTER; } else { struct gimplify_omp_ctx *octx = outer->outer_context; if (octx && octx->region_type == ORT_COMBINED_PARALLEL && octx->outer_context && (octx->outer_context->region_type == ORT_WORKSHARE) && octx->outer_context->combined_loop) { octx = octx->outer_context; n = splay_tree_lookup (octx->variables, (splay_tree_key)decl); if (n != NULL && (n->value & GOVD_LOCAL) != 0) { OMP_CLAUSE_LINEAR_NO_COPYOUT (c) = 1; flags |= GOVD_LINEAR_LASTPRIVATE_NO_OUTER; } } } } } OMP_CLAUSE_DECL (c) = decl; OMP_CLAUSE_CHAIN (c) = OMP_FOR_CLAUSES (for_stmt); OMP_FOR_CLAUSES (for_stmt) = c; omp_add_variable (gimplify_omp_ctxp, decl, flags); if (outer && !OMP_CLAUSE_LINEAR_NO_COPYOUT (c)) omp_lastprivate_for_combined_outer_constructs (outer, decl, true); } else { bool lastprivate = (!has_decl_expr || !bitmap_bit_p (has_decl_expr, DECL_UID (decl))); if (TREE_PRIVATE (t)) lastprivate = false; if (loop_p && OMP_FOR_ORIG_DECLS (for_stmt)) { tree elt = TREE_VEC_ELT (OMP_FOR_ORIG_DECLS (for_stmt), i); if (TREE_CODE (elt) == TREE_LIST && TREE_PURPOSE (elt)) lastprivate = false; } struct gimplify_omp_ctx *outer = gimplify_omp_ctxp->outer_context; if (outer && lastprivate) omp_lastprivate_for_combined_outer_constructs (outer, decl, true); c = build_omp_clause (input_location, lastprivate ? OMP_CLAUSE_LASTPRIVATE : OMP_CLAUSE_PRIVATE); OMP_CLAUSE_DECL (c) = decl; OMP_CLAUSE_CHAIN (c) = OMP_FOR_CLAUSES (for_stmt); OMP_FOR_CLAUSES (for_stmt) = c; omp_add_variable (gimplify_omp_ctxp, decl, (lastprivate ? GOVD_LASTPRIVATE : GOVD_PRIVATE) | GOVD_EXPLICIT | GOVD_SEEN); c = NULL_TREE; } } else if (omp_is_private (gimplify_omp_ctxp, decl, 0)) { omp_notice_variable (gimplify_omp_ctxp, decl, true); splay_tree_node n = splay_tree_lookup (gimplify_omp_ctxp->variables, (splay_tree_key) decl); if (n && (n->value & GOVD_LASTPRIVATE_CONDITIONAL)) for (tree c3 = omp_find_clause (OMP_FOR_CLAUSES (for_stmt), OMP_CLAUSE_LASTPRIVATE); c3; c3 = omp_find_clause (OMP_CLAUSE_CHAIN (c3), OMP_CLAUSE_LASTPRIVATE)) if (OMP_CLAUSE_DECL (c3) == decl) { warning_at (OMP_CLAUSE_LOCATION (c3), 0, "conditional % on loop " "iterator %qD ignored", decl); OMP_CLAUSE_LASTPRIVATE_CONDITIONAL (c3) = 0; n->value &= ~GOVD_LASTPRIVATE_CONDITIONAL; } } else omp_add_variable (gimplify_omp_ctxp, decl, GOVD_PRIVATE | GOVD_SEEN); /* If DECL is not a gimple register, create a temporary variable to act as an iteration counter. This is valid, since DECL cannot be modified in the body of the loop. Similarly for any iteration vars in simd with collapse > 1 where the iterator vars must be lastprivate. And similarly for vars mentioned in allocate clauses. */ if (orig_for_stmt != for_stmt) var = decl; else if (!is_gimple_reg (decl) || (ort == ORT_SIMD && TREE_VEC_LENGTH (OMP_FOR_INIT (for_stmt)) > 1) || (allocate_uids && allocate_uids->contains (decl))) { struct gimplify_omp_ctx *ctx = gimplify_omp_ctxp; /* Make sure omp_add_variable is not called on it prematurely. We call it ourselves a few lines later. */ gimplify_omp_ctxp = NULL; var = create_tmp_var (TREE_TYPE (decl), get_name (decl)); gimplify_omp_ctxp = ctx; TREE_OPERAND (t, 0) = var; gimplify_seq_add_stmt (&for_body, gimple_build_assign (decl, var)); if (ort == ORT_SIMD && TREE_VEC_LENGTH (OMP_FOR_INIT (for_stmt)) == 1) { c2 = build_omp_clause (input_location, OMP_CLAUSE_LINEAR); OMP_CLAUSE_LINEAR_NO_COPYIN (c2) = 1; OMP_CLAUSE_LINEAR_NO_COPYOUT (c2) = 1; OMP_CLAUSE_DECL (c2) = var; OMP_CLAUSE_CHAIN (c2) = OMP_FOR_CLAUSES (for_stmt); OMP_FOR_CLAUSES (for_stmt) = c2; omp_add_variable (gimplify_omp_ctxp, var, GOVD_LINEAR | GOVD_EXPLICIT | GOVD_SEEN); if (c == NULL_TREE) { c = c2; c2 = NULL_TREE; } } else omp_add_variable (gimplify_omp_ctxp, var, GOVD_PRIVATE | GOVD_SEEN); } else var = decl; gimplify_omp_ctxp->in_for_exprs = true; if (TREE_CODE (TREE_OPERAND (t, 1)) == TREE_VEC) { tree lb = TREE_OPERAND (t, 1); tret = gimplify_expr (&TREE_VEC_ELT (lb, 1), &for_pre_body, NULL, is_gimple_val, fb_rvalue, false); ret = MIN (ret, tret); tret = gimplify_expr (&TREE_VEC_ELT (lb, 2), &for_pre_body, NULL, is_gimple_val, fb_rvalue, false); } else tret = gimplify_expr (&TREE_OPERAND (t, 1), &for_pre_body, NULL, is_gimple_val, fb_rvalue, false); gimplify_omp_ctxp->in_for_exprs = false; ret = MIN (ret, tret); if (ret == GS_ERROR) return ret; /* Handle OMP_FOR_COND. */ t = TREE_VEC_ELT (OMP_FOR_COND (for_stmt), i); gcc_assert (COMPARISON_CLASS_P (t)); gcc_assert (TREE_OPERAND (t, 0) == decl); gimplify_omp_ctxp->in_for_exprs = true; if (TREE_CODE (TREE_OPERAND (t, 1)) == TREE_VEC) { tree ub = TREE_OPERAND (t, 1); tret = gimplify_expr (&TREE_VEC_ELT (ub, 1), &for_pre_body, NULL, is_gimple_val, fb_rvalue, false); ret = MIN (ret, tret); tret = gimplify_expr (&TREE_VEC_ELT (ub, 2), &for_pre_body, NULL, is_gimple_val, fb_rvalue, false); } else tret = gimplify_expr (&TREE_OPERAND (t, 1), &for_pre_body, NULL, is_gimple_val, fb_rvalue, false); gimplify_omp_ctxp->in_for_exprs = false; ret = MIN (ret, tret); /* Handle OMP_FOR_INCR. */ t = TREE_VEC_ELT (OMP_FOR_INCR (for_stmt), i); switch (TREE_CODE (t)) { case PREINCREMENT_EXPR: case POSTINCREMENT_EXPR: { tree decl = TREE_OPERAND (t, 0); /* c_omp_for_incr_canonicalize_ptr() should have been called to massage things appropriately. */ gcc_assert (!POINTER_TYPE_P (TREE_TYPE (decl))); if (orig_for_stmt != for_stmt) break; t = build_int_cst (TREE_TYPE (decl), 1); if (c) OMP_CLAUSE_LINEAR_STEP (c) = t; t = build2 (PLUS_EXPR, TREE_TYPE (decl), var, t); t = build2 (MODIFY_EXPR, TREE_TYPE (var), var, t); TREE_VEC_ELT (OMP_FOR_INCR (for_stmt), i) = t; break; } case PREDECREMENT_EXPR: case POSTDECREMENT_EXPR: /* c_omp_for_incr_canonicalize_ptr() should have been called to massage things appropriately. */ gcc_assert (!POINTER_TYPE_P (TREE_TYPE (decl))); if (orig_for_stmt != for_stmt) break; t = build_int_cst (TREE_TYPE (decl), -1); if (c) OMP_CLAUSE_LINEAR_STEP (c) = t; t = build2 (PLUS_EXPR, TREE_TYPE (decl), var, t); t = build2 (MODIFY_EXPR, TREE_TYPE (var), var, t); TREE_VEC_ELT (OMP_FOR_INCR (for_stmt), i) = t; break; case MODIFY_EXPR: gcc_assert (TREE_OPERAND (t, 0) == decl); TREE_OPERAND (t, 0) = var; t = TREE_OPERAND (t, 1); switch (TREE_CODE (t)) { case PLUS_EXPR: if (TREE_OPERAND (t, 1) == decl) { TREE_OPERAND (t, 1) = TREE_OPERAND (t, 0); TREE_OPERAND (t, 0) = var; break; } /* Fallthru. */ case MINUS_EXPR: case POINTER_PLUS_EXPR: gcc_assert (TREE_OPERAND (t, 0) == decl); TREE_OPERAND (t, 0) = var; break; default: gcc_unreachable (); } gimplify_omp_ctxp->in_for_exprs = true; tret = gimplify_expr (&TREE_OPERAND (t, 1), &for_pre_body, NULL, is_gimple_val, fb_rvalue, false); ret = MIN (ret, tret); if (c) { tree step = TREE_OPERAND (t, 1); tree stept = TREE_TYPE (decl); if (POINTER_TYPE_P (stept)) stept = sizetype; step = fold_convert (stept, step); if (TREE_CODE (t) == MINUS_EXPR) step = fold_build1 (NEGATE_EXPR, stept, step); OMP_CLAUSE_LINEAR_STEP (c) = step; if (step != TREE_OPERAND (t, 1)) { tret = gimplify_expr (&OMP_CLAUSE_LINEAR_STEP (c), &for_pre_body, NULL, is_gimple_val, fb_rvalue, false); ret = MIN (ret, tret); } } gimplify_omp_ctxp->in_for_exprs = false; break; default: gcc_unreachable (); } if (c2) { gcc_assert (c); OMP_CLAUSE_LINEAR_STEP (c2) = OMP_CLAUSE_LINEAR_STEP (c); } if ((var != decl || collapse > 1 || tile) && orig_for_stmt == for_stmt) { for (c = OMP_FOR_CLAUSES (for_stmt); c ; c = OMP_CLAUSE_CHAIN (c)) if (((OMP_CLAUSE_CODE (c) == OMP_CLAUSE_LASTPRIVATE && OMP_CLAUSE_LASTPRIVATE_GIMPLE_SEQ (c) == NULL) || (OMP_CLAUSE_CODE (c) == OMP_CLAUSE_LINEAR && !OMP_CLAUSE_LINEAR_NO_COPYOUT (c) && OMP_CLAUSE_LINEAR_GIMPLE_SEQ (c) == NULL)) && OMP_CLAUSE_DECL (c) == decl) { if (is_doacross && (collapse == 1 || i >= collapse)) t = var; else { t = TREE_VEC_ELT (OMP_FOR_INCR (for_stmt), i); gcc_assert (TREE_CODE (t) == MODIFY_EXPR); gcc_assert (TREE_OPERAND (t, 0) == var); t = TREE_OPERAND (t, 1); gcc_assert (TREE_CODE (t) == PLUS_EXPR || TREE_CODE (t) == MINUS_EXPR || TREE_CODE (t) == POINTER_PLUS_EXPR); gcc_assert (TREE_OPERAND (t, 0) == var); t = build2 (TREE_CODE (t), TREE_TYPE (decl), is_doacross ? var : decl, TREE_OPERAND (t, 1)); } gimple_seq *seq; if (OMP_CLAUSE_CODE (c) == OMP_CLAUSE_LASTPRIVATE) seq = &OMP_CLAUSE_LASTPRIVATE_GIMPLE_SEQ (c); else seq = &OMP_CLAUSE_LINEAR_GIMPLE_SEQ (c); push_gimplify_context (); gimplify_assign (decl, t, seq); gimple *bind = NULL; if (gimplify_ctxp->temps) { bind = gimple_build_bind (NULL_TREE, *seq, NULL_TREE); *seq = NULL; gimplify_seq_add_stmt (seq, bind); } pop_gimplify_context (bind); } } if (OMP_FOR_NON_RECTANGULAR (for_stmt) && var != decl) for (int j = i + 1; j < TREE_VEC_LENGTH (OMP_FOR_INIT (for_stmt)); j++) { t = TREE_VEC_ELT (OMP_FOR_INIT (for_stmt), j); gcc_assert (TREE_CODE (t) == MODIFY_EXPR); if (TREE_CODE (TREE_OPERAND (t, 1)) == TREE_VEC && TREE_VEC_ELT (TREE_OPERAND (t, 1), 0) == decl) TREE_VEC_ELT (TREE_OPERAND (t, 1), 0) = var; t = TREE_VEC_ELT (OMP_FOR_COND (for_stmt), j); gcc_assert (COMPARISON_CLASS_P (t)); if (TREE_CODE (TREE_OPERAND (t, 1)) == TREE_VEC && TREE_VEC_ELT (TREE_OPERAND (t, 1), 0) == decl) TREE_VEC_ELT (TREE_OPERAND (t, 1), 0) = var; } } BITMAP_FREE (has_decl_expr); delete allocate_uids; if (TREE_CODE (orig_for_stmt) == OMP_TASKLOOP || (loop_p && orig_for_stmt == for_stmt)) { push_gimplify_context (); if (TREE_CODE (OMP_FOR_BODY (orig_for_stmt)) != BIND_EXPR) { OMP_FOR_BODY (orig_for_stmt) = build3 (BIND_EXPR, void_type_node, NULL, OMP_FOR_BODY (orig_for_stmt), NULL); TREE_SIDE_EFFECTS (OMP_FOR_BODY (orig_for_stmt)) = 1; } } gimple *g = gimplify_and_return_first (OMP_FOR_BODY (orig_for_stmt), &for_body); if (TREE_CODE (orig_for_stmt) == OMP_TASKLOOP || (loop_p && orig_for_stmt == for_stmt)) { if (gimple_code (g) == GIMPLE_BIND) pop_gimplify_context (g); else pop_gimplify_context (NULL); } if (orig_for_stmt != for_stmt) for (i = 0; i < TREE_VEC_LENGTH (OMP_FOR_INIT (for_stmt)); i++) { t = TREE_VEC_ELT (OMP_FOR_INIT (for_stmt), i); decl = TREE_OPERAND (t, 0); struct gimplify_omp_ctx *ctx = gimplify_omp_ctxp; if (TREE_CODE (orig_for_stmt) == OMP_TASKLOOP) gimplify_omp_ctxp = ctx->outer_context; var = create_tmp_var (TREE_TYPE (decl), get_name (decl)); gimplify_omp_ctxp = ctx; omp_add_variable (gimplify_omp_ctxp, var, GOVD_PRIVATE | GOVD_SEEN); TREE_OPERAND (t, 0) = var; t = TREE_VEC_ELT (OMP_FOR_INCR (for_stmt), i); TREE_OPERAND (t, 1) = copy_node (TREE_OPERAND (t, 1)); TREE_OPERAND (TREE_OPERAND (t, 1), 0) = var; if (OMP_FOR_NON_RECTANGULAR (for_stmt)) for (int j = i + 1; j < TREE_VEC_LENGTH (OMP_FOR_INIT (for_stmt)); j++) { t = TREE_VEC_ELT (OMP_FOR_INIT (for_stmt), j); gcc_assert (TREE_CODE (t) == MODIFY_EXPR); if (TREE_CODE (TREE_OPERAND (t, 1)) == TREE_VEC && TREE_VEC_ELT (TREE_OPERAND (t, 1), 0) == decl) { TREE_OPERAND (t, 1) = copy_node (TREE_OPERAND (t, 1)); TREE_VEC_ELT (TREE_OPERAND (t, 1), 0) = var; } t = TREE_VEC_ELT (OMP_FOR_COND (for_stmt), j); gcc_assert (COMPARISON_CLASS_P (t)); if (TREE_CODE (TREE_OPERAND (t, 1)) == TREE_VEC && TREE_VEC_ELT (TREE_OPERAND (t, 1), 0) == decl) { TREE_OPERAND (t, 1) = copy_node (TREE_OPERAND (t, 1)); TREE_VEC_ELT (TREE_OPERAND (t, 1), 0) = var; } } } gimplify_adjust_omp_clauses (pre_p, for_body, &OMP_FOR_CLAUSES (orig_for_stmt), TREE_CODE (orig_for_stmt)); int kind; switch (TREE_CODE (orig_for_stmt)) { case OMP_FOR: kind = GF_OMP_FOR_KIND_FOR; break; case OMP_SIMD: kind = GF_OMP_FOR_KIND_SIMD; break; case OMP_DISTRIBUTE: kind = GF_OMP_FOR_KIND_DISTRIBUTE; break; case OMP_TASKLOOP: kind = GF_OMP_FOR_KIND_TASKLOOP; break; case OACC_LOOP: kind = GF_OMP_FOR_KIND_OACC_LOOP; break; default: gcc_unreachable (); } if (loop_p && kind == GF_OMP_FOR_KIND_SIMD) { gimplify_seq_add_seq (pre_p, for_pre_body); for_pre_body = NULL; } gfor = gimple_build_omp_for (for_body, kind, OMP_FOR_CLAUSES (orig_for_stmt), TREE_VEC_LENGTH (OMP_FOR_INIT (for_stmt)), for_pre_body); if (orig_for_stmt != for_stmt) gimple_omp_for_set_combined_p (gfor, true); if (gimplify_omp_ctxp && (gimplify_omp_ctxp->combined_loop || (gimplify_omp_ctxp->region_type == ORT_COMBINED_PARALLEL && gimplify_omp_ctxp->outer_context && gimplify_omp_ctxp->outer_context->combined_loop))) { gimple_omp_for_set_combined_into_p (gfor, true); if (gimplify_omp_ctxp->combined_loop) gcc_assert (TREE_CODE (orig_for_stmt) == OMP_SIMD); else gcc_assert (TREE_CODE (orig_for_stmt) == OMP_FOR); } for (i = 0; i < TREE_VEC_LENGTH (OMP_FOR_INIT (for_stmt)); i++) { t = TREE_VEC_ELT (OMP_FOR_INIT (for_stmt), i); gimple_omp_for_set_index (gfor, i, TREE_OPERAND (t, 0)); gimple_omp_for_set_initial (gfor, i, TREE_OPERAND (t, 1)); t = TREE_VEC_ELT (OMP_FOR_COND (for_stmt), i); gimple_omp_for_set_cond (gfor, i, TREE_CODE (t)); gimple_omp_for_set_final (gfor, i, TREE_OPERAND (t, 1)); t = TREE_VEC_ELT (OMP_FOR_INCR (for_stmt), i); gimple_omp_for_set_incr (gfor, i, TREE_OPERAND (t, 1)); } /* OMP_TASKLOOP is gimplified as two GIMPLE_OMP_FOR taskloop constructs with GIMPLE_OMP_TASK sandwiched in between them. The outer taskloop stands for computing the number of iterations, counts for collapsed loops and holding taskloop specific clauses. The task construct stands for the effect of data sharing on the explicit task it creates and the inner taskloop stands for expansion of the static loop inside of the explicit task construct. */ if (TREE_CODE (orig_for_stmt) == OMP_TASKLOOP) { tree *gfor_clauses_ptr = gimple_omp_for_clauses_ptr (gfor); tree task_clauses = NULL_TREE; tree c = *gfor_clauses_ptr; tree *gtask_clauses_ptr = &task_clauses; tree outer_for_clauses = NULL_TREE; tree *gforo_clauses_ptr = &outer_for_clauses; bitmap lastprivate_uids = NULL; if (omp_find_clause (c, OMP_CLAUSE_ALLOCATE)) { c = omp_find_clause (c, OMP_CLAUSE_LASTPRIVATE); if (c) { lastprivate_uids = BITMAP_ALLOC (NULL); for (; c; c = omp_find_clause (OMP_CLAUSE_CHAIN (c), OMP_CLAUSE_LASTPRIVATE)) bitmap_set_bit (lastprivate_uids, DECL_UID (OMP_CLAUSE_DECL (c))); } c = *gfor_clauses_ptr; } for (; c; c = OMP_CLAUSE_CHAIN (c)) switch (OMP_CLAUSE_CODE (c)) { /* These clauses are allowed on task, move them there. */ case OMP_CLAUSE_SHARED: case OMP_CLAUSE_FIRSTPRIVATE: case OMP_CLAUSE_DEFAULT: case OMP_CLAUSE_IF: case OMP_CLAUSE_UNTIED: case OMP_CLAUSE_FINAL: case OMP_CLAUSE_MERGEABLE: case OMP_CLAUSE_PRIORITY: case OMP_CLAUSE_REDUCTION: case OMP_CLAUSE_IN_REDUCTION: *gtask_clauses_ptr = c; gtask_clauses_ptr = &OMP_CLAUSE_CHAIN (c); break; case OMP_CLAUSE_PRIVATE: if (OMP_CLAUSE_PRIVATE_TASKLOOP_IV (c)) { /* We want private on outer for and firstprivate on task. */ *gtask_clauses_ptr = build_omp_clause (OMP_CLAUSE_LOCATION (c), OMP_CLAUSE_FIRSTPRIVATE); OMP_CLAUSE_DECL (*gtask_clauses_ptr) = OMP_CLAUSE_DECL (c); lang_hooks.decls.omp_finish_clause (*gtask_clauses_ptr, NULL, openacc); gtask_clauses_ptr = &OMP_CLAUSE_CHAIN (*gtask_clauses_ptr); *gforo_clauses_ptr = c; gforo_clauses_ptr = &OMP_CLAUSE_CHAIN (c); } else { *gtask_clauses_ptr = c; gtask_clauses_ptr = &OMP_CLAUSE_CHAIN (c); } break; /* These clauses go into outer taskloop clauses. */ case OMP_CLAUSE_GRAINSIZE: case OMP_CLAUSE_NUM_TASKS: case OMP_CLAUSE_NOGROUP: *gforo_clauses_ptr = c; gforo_clauses_ptr = &OMP_CLAUSE_CHAIN (c); break; /* Collapse clause we duplicate on both taskloops. */ case OMP_CLAUSE_COLLAPSE: *gfor_clauses_ptr = c; gfor_clauses_ptr = &OMP_CLAUSE_CHAIN (c); *gforo_clauses_ptr = copy_node (c); gforo_clauses_ptr = &OMP_CLAUSE_CHAIN (*gforo_clauses_ptr); break; /* For lastprivate, keep the clause on inner taskloop, and add a shared clause on task. If the same decl is also firstprivate, add also firstprivate clause on the inner taskloop. */ case OMP_CLAUSE_LASTPRIVATE: if (OMP_CLAUSE_LASTPRIVATE_LOOP_IV (c)) { /* For taskloop C++ lastprivate IVs, we want: 1) private on outer taskloop 2) firstprivate and shared on task 3) lastprivate on inner taskloop */ *gtask_clauses_ptr = build_omp_clause (OMP_CLAUSE_LOCATION (c), OMP_CLAUSE_FIRSTPRIVATE); OMP_CLAUSE_DECL (*gtask_clauses_ptr) = OMP_CLAUSE_DECL (c); lang_hooks.decls.omp_finish_clause (*gtask_clauses_ptr, NULL, openacc); gtask_clauses_ptr = &OMP_CLAUSE_CHAIN (*gtask_clauses_ptr); OMP_CLAUSE_LASTPRIVATE_FIRSTPRIVATE (c) = 1; *gforo_clauses_ptr = build_omp_clause (OMP_CLAUSE_LOCATION (c), OMP_CLAUSE_PRIVATE); OMP_CLAUSE_DECL (*gforo_clauses_ptr) = OMP_CLAUSE_DECL (c); OMP_CLAUSE_PRIVATE_TASKLOOP_IV (*gforo_clauses_ptr) = 1; TREE_TYPE (*gforo_clauses_ptr) = TREE_TYPE (c); gforo_clauses_ptr = &OMP_CLAUSE_CHAIN (*gforo_clauses_ptr); } *gfor_clauses_ptr = c; gfor_clauses_ptr = &OMP_CLAUSE_CHAIN (c); *gtask_clauses_ptr = build_omp_clause (OMP_CLAUSE_LOCATION (c), OMP_CLAUSE_SHARED); OMP_CLAUSE_DECL (*gtask_clauses_ptr) = OMP_CLAUSE_DECL (c); if (OMP_CLAUSE_LASTPRIVATE_FIRSTPRIVATE (c)) OMP_CLAUSE_SHARED_FIRSTPRIVATE (*gtask_clauses_ptr) = 1; gtask_clauses_ptr = &OMP_CLAUSE_CHAIN (*gtask_clauses_ptr); break; /* Allocate clause we duplicate on task and inner taskloop if the decl is lastprivate, otherwise just put on task. */ case OMP_CLAUSE_ALLOCATE: if (OMP_CLAUSE_ALLOCATE_ALLOCATOR (c) && DECL_P (OMP_CLAUSE_ALLOCATE_ALLOCATOR (c))) { /* Additionally, put firstprivate clause on task for the allocator if it is not constant. */ *gtask_clauses_ptr = build_omp_clause (OMP_CLAUSE_LOCATION (c), OMP_CLAUSE_FIRSTPRIVATE); OMP_CLAUSE_DECL (*gtask_clauses_ptr) = OMP_CLAUSE_ALLOCATE_ALLOCATOR (c); gtask_clauses_ptr = &OMP_CLAUSE_CHAIN (*gtask_clauses_ptr); } if (lastprivate_uids && bitmap_bit_p (lastprivate_uids, DECL_UID (OMP_CLAUSE_DECL (c)))) { *gfor_clauses_ptr = c; gfor_clauses_ptr = &OMP_CLAUSE_CHAIN (c); *gtask_clauses_ptr = copy_node (c); gtask_clauses_ptr = &OMP_CLAUSE_CHAIN (*gtask_clauses_ptr); } else { *gtask_clauses_ptr = c; gtask_clauses_ptr = &OMP_CLAUSE_CHAIN (c); } break; default: gcc_unreachable (); } *gfor_clauses_ptr = NULL_TREE; *gtask_clauses_ptr = NULL_TREE; *gforo_clauses_ptr = NULL_TREE; BITMAP_FREE (lastprivate_uids); gimple_set_location (gfor, input_location); g = gimple_build_bind (NULL_TREE, gfor, NULL_TREE); g = gimple_build_omp_task (g, task_clauses, NULL_TREE, NULL_TREE, NULL_TREE, NULL_TREE, NULL_TREE); gimple_set_location (g, input_location); gimple_omp_task_set_taskloop_p (g, true); g = gimple_build_bind (NULL_TREE, g, NULL_TREE); gomp_for *gforo = gimple_build_omp_for (g, GF_OMP_FOR_KIND_TASKLOOP, outer_for_clauses, gimple_omp_for_collapse (gfor), gimple_omp_for_pre_body (gfor)); gimple_omp_for_set_pre_body (gfor, NULL); gimple_omp_for_set_combined_p (gforo, true); gimple_omp_for_set_combined_into_p (gfor, true); for (i = 0; i < (int) gimple_omp_for_collapse (gfor); i++) { tree type = TREE_TYPE (gimple_omp_for_index (gfor, i)); tree v = create_tmp_var (type); gimple_omp_for_set_index (gforo, i, v); t = unshare_expr (gimple_omp_for_initial (gfor, i)); gimple_omp_for_set_initial (gforo, i, t); gimple_omp_for_set_cond (gforo, i, gimple_omp_for_cond (gfor, i)); t = unshare_expr (gimple_omp_for_final (gfor, i)); gimple_omp_for_set_final (gforo, i, t); t = unshare_expr (gimple_omp_for_incr (gfor, i)); gcc_assert (TREE_OPERAND (t, 0) == gimple_omp_for_index (gfor, i)); TREE_OPERAND (t, 0) = v; gimple_omp_for_set_incr (gforo, i, t); t = build_omp_clause (input_location, OMP_CLAUSE_PRIVATE); OMP_CLAUSE_DECL (t) = v; OMP_CLAUSE_CHAIN (t) = gimple_omp_for_clauses (gforo); gimple_omp_for_set_clauses (gforo, t); if (OMP_FOR_NON_RECTANGULAR (for_stmt)) { tree *p1 = NULL, *p2 = NULL; t = gimple_omp_for_initial (gforo, i); if (TREE_CODE (t) == TREE_VEC) p1 = &TREE_VEC_ELT (t, 0); t = gimple_omp_for_final (gforo, i); if (TREE_CODE (t) == TREE_VEC) { if (p1) p2 = &TREE_VEC_ELT (t, 0); else p1 = &TREE_VEC_ELT (t, 0); } if (p1) { int j; for (j = 0; j < i; j++) if (*p1 == gimple_omp_for_index (gfor, j)) { *p1 = gimple_omp_for_index (gforo, j); if (p2) *p2 = *p1; break; } gcc_assert (j < i); } } } gimplify_seq_add_stmt (pre_p, gforo); } else gimplify_seq_add_stmt (pre_p, gfor); if (TREE_CODE (orig_for_stmt) == OMP_FOR) { struct gimplify_omp_ctx *ctx = gimplify_omp_ctxp; unsigned lastprivate_conditional = 0; while (ctx && (ctx->region_type == ORT_TARGET_DATA || ctx->region_type == ORT_TASKGROUP)) ctx = ctx->outer_context; if (ctx && (ctx->region_type & ORT_PARALLEL) != 0) for (tree c = gimple_omp_for_clauses (gfor); c; c = OMP_CLAUSE_CHAIN (c)) if (OMP_CLAUSE_CODE (c) == OMP_CLAUSE_LASTPRIVATE && OMP_CLAUSE_LASTPRIVATE_CONDITIONAL (c)) ++lastprivate_conditional; if (lastprivate_conditional) { struct omp_for_data fd; omp_extract_for_data (gfor, &fd, NULL); tree type = build_array_type_nelts (unsigned_type_for (fd.iter_type), lastprivate_conditional); tree var = create_tmp_var_raw (type); tree c = build_omp_clause (UNKNOWN_LOCATION, OMP_CLAUSE__CONDTEMP_); OMP_CLAUSE_DECL (c) = var; OMP_CLAUSE_CHAIN (c) = gimple_omp_for_clauses (gfor); gimple_omp_for_set_clauses (gfor, c); omp_add_variable (ctx, var, GOVD_CONDTEMP | GOVD_SEEN); } } else if (TREE_CODE (orig_for_stmt) == OMP_SIMD) { unsigned lastprivate_conditional = 0; for (tree c = gimple_omp_for_clauses (gfor); c; c = OMP_CLAUSE_CHAIN (c)) if (OMP_CLAUSE_CODE (c) == OMP_CLAUSE_LASTPRIVATE && OMP_CLAUSE_LASTPRIVATE_CONDITIONAL (c)) ++lastprivate_conditional; if (lastprivate_conditional) { struct omp_for_data fd; omp_extract_for_data (gfor, &fd, NULL); tree type = unsigned_type_for (fd.iter_type); while (lastprivate_conditional--) { tree c = build_omp_clause (UNKNOWN_LOCATION, OMP_CLAUSE__CONDTEMP_); OMP_CLAUSE_DECL (c) = create_tmp_var (type); OMP_CLAUSE_CHAIN (c) = gimple_omp_for_clauses (gfor); gimple_omp_for_set_clauses (gfor, c); } } } if (ret != GS_ALL_DONE) return GS_ERROR; *expr_p = NULL_TREE; return GS_ALL_DONE; } /* Helper for gimplify_omp_loop, called through walk_tree. */ static tree note_no_context_vars (tree *tp, int *, void *data) { if (VAR_P (*tp) && DECL_CONTEXT (*tp) == NULL_TREE && !is_global_var (*tp)) { vec *d = (vec *) data; d->safe_push (*tp); DECL_CONTEXT (*tp) = current_function_decl; } return NULL_TREE; } /* Gimplify the gross structure of an OMP_LOOP statement. */ static enum gimplify_status gimplify_omp_loop (tree *expr_p, gimple_seq *pre_p) { tree for_stmt = *expr_p; tree clauses = OMP_FOR_CLAUSES (for_stmt); struct gimplify_omp_ctx *octx = gimplify_omp_ctxp; enum omp_clause_bind_kind kind = OMP_CLAUSE_BIND_THREAD; int i; /* If order is not present, the behavior is as if order(concurrent) appeared. */ tree order = omp_find_clause (clauses, OMP_CLAUSE_ORDER); if (order == NULL_TREE) { order = build_omp_clause (UNKNOWN_LOCATION, OMP_CLAUSE_ORDER); OMP_CLAUSE_CHAIN (order) = clauses; OMP_FOR_CLAUSES (for_stmt) = clauses = order; } tree bind = omp_find_clause (clauses, OMP_CLAUSE_BIND); if (bind == NULL_TREE) { if (!flag_openmp) /* flag_openmp_simd */ ; else if (octx && (octx->region_type & ORT_TEAMS) != 0) kind = OMP_CLAUSE_BIND_TEAMS; else if (octx && (octx->region_type & ORT_PARALLEL) != 0) kind = OMP_CLAUSE_BIND_PARALLEL; else { for (; octx; octx = octx->outer_context) { if ((octx->region_type & ORT_ACC) != 0 || octx->region_type == ORT_NONE || octx->region_type == ORT_IMPLICIT_TARGET) continue; break; } if (octx == NULL && !in_omp_construct) error_at (EXPR_LOCATION (for_stmt), "% clause not specified on a % " "construct not nested inside another OpenMP construct"); } bind = build_omp_clause (UNKNOWN_LOCATION, OMP_CLAUSE_BIND); OMP_CLAUSE_CHAIN (bind) = clauses; OMP_CLAUSE_BIND_KIND (bind) = kind; OMP_FOR_CLAUSES (for_stmt) = bind; } else switch (OMP_CLAUSE_BIND_KIND (bind)) { case OMP_CLAUSE_BIND_THREAD: break; case OMP_CLAUSE_BIND_PARALLEL: if (!flag_openmp) /* flag_openmp_simd */ { OMP_CLAUSE_BIND_KIND (bind) = OMP_CLAUSE_BIND_THREAD; break; } for (; octx; octx = octx->outer_context) if (octx->region_type == ORT_SIMD && omp_find_clause (octx->clauses, OMP_CLAUSE_BIND) == NULL_TREE) { error_at (EXPR_LOCATION (for_stmt), "% on a % construct nested " "inside % construct"); OMP_CLAUSE_BIND_KIND (bind) = OMP_CLAUSE_BIND_THREAD; break; } kind = OMP_CLAUSE_BIND_PARALLEL; break; case OMP_CLAUSE_BIND_TEAMS: if (!flag_openmp) /* flag_openmp_simd */ { OMP_CLAUSE_BIND_KIND (bind) = OMP_CLAUSE_BIND_THREAD; break; } if ((octx && octx->region_type != ORT_IMPLICIT_TARGET && octx->region_type != ORT_NONE && (octx->region_type & ORT_TEAMS) == 0) || in_omp_construct) { error_at (EXPR_LOCATION (for_stmt), "% on a % region not strictly " "nested inside of a % region"); OMP_CLAUSE_BIND_KIND (bind) = OMP_CLAUSE_BIND_THREAD; break; } kind = OMP_CLAUSE_BIND_TEAMS; break; default: gcc_unreachable (); } for (tree *pc = &OMP_FOR_CLAUSES (for_stmt); *pc; ) switch (OMP_CLAUSE_CODE (*pc)) { case OMP_CLAUSE_REDUCTION: if (OMP_CLAUSE_REDUCTION_INSCAN (*pc)) { error_at (OMP_CLAUSE_LOCATION (*pc), "% % clause on " "%qs construct", "loop"); OMP_CLAUSE_REDUCTION_INSCAN (*pc) = 0; } if (OMP_CLAUSE_REDUCTION_TASK (*pc)) { error_at (OMP_CLAUSE_LOCATION (*pc), "invalid % reduction modifier on construct " "other than %, %qs or %", lang_GNU_Fortran () ? "do" : "for"); OMP_CLAUSE_REDUCTION_TASK (*pc) = 0; } pc = &OMP_CLAUSE_CHAIN (*pc); break; case OMP_CLAUSE_LASTPRIVATE: for (i = 0; i < TREE_VEC_LENGTH (OMP_FOR_INIT (for_stmt)); i++) { tree t = TREE_VEC_ELT (OMP_FOR_INIT (for_stmt), i); gcc_assert (TREE_CODE (t) == MODIFY_EXPR); if (OMP_CLAUSE_DECL (*pc) == TREE_OPERAND (t, 0)) break; if (OMP_FOR_ORIG_DECLS (for_stmt) && TREE_CODE (TREE_VEC_ELT (OMP_FOR_ORIG_DECLS (for_stmt), i)) == TREE_LIST && TREE_PURPOSE (TREE_VEC_ELT (OMP_FOR_ORIG_DECLS (for_stmt), i))) { tree orig = TREE_VEC_ELT (OMP_FOR_ORIG_DECLS (for_stmt), i); if (OMP_CLAUSE_DECL (*pc) == TREE_PURPOSE (orig)) break; } } if (i == TREE_VEC_LENGTH (OMP_FOR_INIT (for_stmt))) { error_at (OMP_CLAUSE_LOCATION (*pc), "% clause on a % construct refers " "to a variable %qD which is not the loop iterator", OMP_CLAUSE_DECL (*pc)); *pc = OMP_CLAUSE_CHAIN (*pc); break; } pc = &OMP_CLAUSE_CHAIN (*pc); break; default: pc = &OMP_CLAUSE_CHAIN (*pc); break; } TREE_SET_CODE (for_stmt, OMP_SIMD); int last; switch (kind) { case OMP_CLAUSE_BIND_THREAD: last = 0; break; case OMP_CLAUSE_BIND_PARALLEL: last = 1; break; case OMP_CLAUSE_BIND_TEAMS: last = 2; break; } for (int pass = 1; pass <= last; pass++) { if (pass == 2) { tree bind = build3 (BIND_EXPR, void_type_node, NULL, NULL, make_node (BLOCK)); append_to_statement_list (*expr_p, &BIND_EXPR_BODY (bind)); *expr_p = make_node (OMP_PARALLEL); TREE_TYPE (*expr_p) = void_type_node; OMP_PARALLEL_BODY (*expr_p) = bind; OMP_PARALLEL_COMBINED (*expr_p) = 1; SET_EXPR_LOCATION (*expr_p, EXPR_LOCATION (for_stmt)); tree *pc = &OMP_PARALLEL_CLAUSES (*expr_p); for (i = 0; i < TREE_VEC_LENGTH (OMP_FOR_INIT (for_stmt)); i++) if (OMP_FOR_ORIG_DECLS (for_stmt) && (TREE_CODE (TREE_VEC_ELT (OMP_FOR_ORIG_DECLS (for_stmt), i)) == TREE_LIST)) { tree elt = TREE_VEC_ELT (OMP_FOR_ORIG_DECLS (for_stmt), i); if (TREE_PURPOSE (elt) && TREE_VALUE (elt)) { *pc = build_omp_clause (UNKNOWN_LOCATION, OMP_CLAUSE_FIRSTPRIVATE); OMP_CLAUSE_DECL (*pc) = TREE_VALUE (elt); pc = &OMP_CLAUSE_CHAIN (*pc); } } } tree t = make_node (pass == 2 ? OMP_DISTRIBUTE : OMP_FOR); tree *pc = &OMP_FOR_CLAUSES (t); TREE_TYPE (t) = void_type_node; OMP_FOR_BODY (t) = *expr_p; SET_EXPR_LOCATION (t, EXPR_LOCATION (for_stmt)); for (tree c = OMP_FOR_CLAUSES (for_stmt); c; c = OMP_CLAUSE_CHAIN (c)) switch (OMP_CLAUSE_CODE (c)) { case OMP_CLAUSE_BIND: case OMP_CLAUSE_ORDER: case OMP_CLAUSE_COLLAPSE: *pc = copy_node (c); pc = &OMP_CLAUSE_CHAIN (*pc); break; case OMP_CLAUSE_PRIVATE: case OMP_CLAUSE_FIRSTPRIVATE: /* Only needed on innermost. */ break; case OMP_CLAUSE_LASTPRIVATE: if (OMP_CLAUSE_LASTPRIVATE_LOOP_IV (c) && pass != last) { *pc = build_omp_clause (OMP_CLAUSE_LOCATION (c), OMP_CLAUSE_FIRSTPRIVATE); OMP_CLAUSE_DECL (*pc) = OMP_CLAUSE_DECL (c); lang_hooks.decls.omp_finish_clause (*pc, NULL, false); pc = &OMP_CLAUSE_CHAIN (*pc); } *pc = copy_node (c); OMP_CLAUSE_LASTPRIVATE_STMT (*pc) = NULL_TREE; TREE_TYPE (*pc) = unshare_expr (TREE_TYPE (c)); if (OMP_CLAUSE_LASTPRIVATE_LOOP_IV (c)) { if (pass != last) OMP_CLAUSE_LASTPRIVATE_FIRSTPRIVATE (*pc) = 1; else lang_hooks.decls.omp_finish_clause (*pc, NULL, false); OMP_CLAUSE_LASTPRIVATE_LOOP_IV (*pc) = 0; } pc = &OMP_CLAUSE_CHAIN (*pc); break; case OMP_CLAUSE_REDUCTION: *pc = copy_node (c); OMP_CLAUSE_DECL (*pc) = unshare_expr (OMP_CLAUSE_DECL (c)); TREE_TYPE (*pc) = unshare_expr (TREE_TYPE (c)); if (OMP_CLAUSE_REDUCTION_PLACEHOLDER (*pc)) { auto_vec no_context_vars; int walk_subtrees = 0; note_no_context_vars (&OMP_CLAUSE_REDUCTION_PLACEHOLDER (c), &walk_subtrees, &no_context_vars); if (tree p = OMP_CLAUSE_REDUCTION_DECL_PLACEHOLDER (c)) note_no_context_vars (&p, &walk_subtrees, &no_context_vars); walk_tree_without_duplicates (&OMP_CLAUSE_REDUCTION_INIT (c), note_no_context_vars, &no_context_vars); walk_tree_without_duplicates (&OMP_CLAUSE_REDUCTION_MERGE (c), note_no_context_vars, &no_context_vars); OMP_CLAUSE_REDUCTION_PLACEHOLDER (*pc) = copy_node (OMP_CLAUSE_REDUCTION_PLACEHOLDER (c)); if (OMP_CLAUSE_REDUCTION_DECL_PLACEHOLDER (*pc)) OMP_CLAUSE_REDUCTION_DECL_PLACEHOLDER (*pc) = copy_node (OMP_CLAUSE_REDUCTION_DECL_PLACEHOLDER (c)); hash_map decl_map; decl_map.put (OMP_CLAUSE_DECL (c), OMP_CLAUSE_DECL (c)); decl_map.put (OMP_CLAUSE_REDUCTION_PLACEHOLDER (c), OMP_CLAUSE_REDUCTION_PLACEHOLDER (*pc)); if (OMP_CLAUSE_REDUCTION_DECL_PLACEHOLDER (*pc)) decl_map.put (OMP_CLAUSE_REDUCTION_DECL_PLACEHOLDER (c), OMP_CLAUSE_REDUCTION_DECL_PLACEHOLDER (*pc)); copy_body_data id; memset (&id, 0, sizeof (id)); id.src_fn = current_function_decl; id.dst_fn = current_function_decl; id.src_cfun = cfun; id.decl_map = &decl_map; id.copy_decl = copy_decl_no_change; id.transform_call_graph_edges = CB_CGE_DUPLICATE; id.transform_new_cfg = true; id.transform_return_to_modify = false; id.eh_lp_nr = 0; walk_tree (&OMP_CLAUSE_REDUCTION_INIT (*pc), copy_tree_body_r, &id, NULL); walk_tree (&OMP_CLAUSE_REDUCTION_MERGE (*pc), copy_tree_body_r, &id, NULL); for (tree d : no_context_vars) { DECL_CONTEXT (d) = NULL_TREE; DECL_CONTEXT (*decl_map.get (d)) = NULL_TREE; } } else { OMP_CLAUSE_REDUCTION_INIT (*pc) = unshare_expr (OMP_CLAUSE_REDUCTION_INIT (c)); OMP_CLAUSE_REDUCTION_MERGE (*pc) = unshare_expr (OMP_CLAUSE_REDUCTION_MERGE (c)); } pc = &OMP_CLAUSE_CHAIN (*pc); break; default: gcc_unreachable (); } *pc = NULL_TREE; *expr_p = t; } return gimplify_expr (expr_p, pre_p, NULL, is_gimple_stmt, fb_none); } /* Helper function of optimize_target_teams, find OMP_TEAMS inside of OMP_TARGET's body. */ static tree find_omp_teams (tree *tp, int *walk_subtrees, void *) { *walk_subtrees = 0; switch (TREE_CODE (*tp)) { case OMP_TEAMS: return *tp; case BIND_EXPR: case STATEMENT_LIST: *walk_subtrees = 1; break; default: break; } return NULL_TREE; } /* Helper function of optimize_target_teams, determine if the expression can be computed safely before the target construct on the host. */ static tree computable_teams_clause (tree *tp, int *walk_subtrees, void *) { splay_tree_node n; if (TYPE_P (*tp)) { *walk_subtrees = 0; return NULL_TREE; } switch (TREE_CODE (*tp)) { case VAR_DECL: case PARM_DECL: case RESULT_DECL: *walk_subtrees = 0; if (error_operand_p (*tp) || !INTEGRAL_TYPE_P (TREE_TYPE (*tp)) || DECL_HAS_VALUE_EXPR_P (*tp) || DECL_THREAD_LOCAL_P (*tp) || TREE_SIDE_EFFECTS (*tp) || TREE_THIS_VOLATILE (*tp)) return *tp; if (is_global_var (*tp) && (lookup_attribute ("omp declare target", DECL_ATTRIBUTES (*tp)) || lookup_attribute ("omp declare target link", DECL_ATTRIBUTES (*tp)))) return *tp; if (VAR_P (*tp) && !DECL_SEEN_IN_BIND_EXPR_P (*tp) && !is_global_var (*tp) && decl_function_context (*tp) == current_function_decl) return *tp; n = splay_tree_lookup (gimplify_omp_ctxp->variables, (splay_tree_key) *tp); if (n == NULL) { if (gimplify_omp_ctxp->defaultmap[GDMK_SCALAR] & GOVD_FIRSTPRIVATE) return NULL_TREE; return *tp; } else if (n->value & GOVD_LOCAL) return *tp; else if (n->value & GOVD_FIRSTPRIVATE) return NULL_TREE; else if ((n->value & (GOVD_MAP | GOVD_MAP_ALWAYS_TO)) == (GOVD_MAP | GOVD_MAP_ALWAYS_TO)) return NULL_TREE; return *tp; case INTEGER_CST: if (!INTEGRAL_TYPE_P (TREE_TYPE (*tp))) return *tp; return NULL_TREE; case TARGET_EXPR: if (TARGET_EXPR_INITIAL (*tp) || TREE_CODE (TARGET_EXPR_SLOT (*tp)) != VAR_DECL) return *tp; return computable_teams_clause (&TARGET_EXPR_SLOT (*tp), walk_subtrees, NULL); /* Allow some reasonable subset of integral arithmetics. */ case PLUS_EXPR: case MINUS_EXPR: case MULT_EXPR: case TRUNC_DIV_EXPR: case CEIL_DIV_EXPR: case FLOOR_DIV_EXPR: case ROUND_DIV_EXPR: case TRUNC_MOD_EXPR: case CEIL_MOD_EXPR: case FLOOR_MOD_EXPR: case ROUND_MOD_EXPR: case RDIV_EXPR: case EXACT_DIV_EXPR: case MIN_EXPR: case MAX_EXPR: case LSHIFT_EXPR: case RSHIFT_EXPR: case BIT_IOR_EXPR: case BIT_XOR_EXPR: case BIT_AND_EXPR: case NEGATE_EXPR: case ABS_EXPR: case BIT_NOT_EXPR: case NON_LVALUE_EXPR: CASE_CONVERT: if (!INTEGRAL_TYPE_P (TREE_TYPE (*tp))) return *tp; return NULL_TREE; /* And disallow anything else, except for comparisons. */ default: if (COMPARISON_CLASS_P (*tp)) return NULL_TREE; return *tp; } } /* Try to determine if the num_teams and/or thread_limit expressions can have their values determined already before entering the target construct. INTEGER_CSTs trivially are, integral decls that are firstprivate (explicitly or implicitly) or explicitly map(always, to:) or map(always, tofrom:) on the target region too, and expressions involving simple arithmetics on those too, function calls are not ok, dereferencing something neither etc. Add NUM_TEAMS and THREAD_LIMIT clauses to the OMP_CLAUSES of EXPR based on what we find: 0 stands for clause not specified at all, use implementation default -1 stands for value that can't be determined easily before entering the target construct. If teams construct is not present at all, use 1 for num_teams and 0 for thread_limit (only one team is involved, and the thread limit is implementation defined. */ static void optimize_target_teams (tree target, gimple_seq *pre_p) { tree body = OMP_BODY (target); tree teams = walk_tree (&body, find_omp_teams, NULL, NULL); tree num_teams_lower = NULL_TREE; tree num_teams_upper = integer_zero_node; tree thread_limit = integer_zero_node; location_t num_teams_loc = EXPR_LOCATION (target); location_t thread_limit_loc = EXPR_LOCATION (target); tree c, *p, expr; struct gimplify_omp_ctx *target_ctx = gimplify_omp_ctxp; if (teams == NULL_TREE) num_teams_upper = integer_one_node; else for (c = OMP_TEAMS_CLAUSES (teams); c; c = OMP_CLAUSE_CHAIN (c)) { if (OMP_CLAUSE_CODE (c) == OMP_CLAUSE_NUM_TEAMS) { p = &num_teams_upper; num_teams_loc = OMP_CLAUSE_LOCATION (c); if (OMP_CLAUSE_NUM_TEAMS_LOWER_EXPR (c)) { expr = OMP_CLAUSE_NUM_TEAMS_LOWER_EXPR (c); if (TREE_CODE (expr) == INTEGER_CST) num_teams_lower = expr; else if (walk_tree (&expr, computable_teams_clause, NULL, NULL)) num_teams_lower = integer_minus_one_node; else { num_teams_lower = expr; gimplify_omp_ctxp = gimplify_omp_ctxp->outer_context; if (gimplify_expr (&num_teams_lower, pre_p, NULL, is_gimple_val, fb_rvalue, false) == GS_ERROR) { gimplify_omp_ctxp = target_ctx; num_teams_lower = integer_minus_one_node; } else { gimplify_omp_ctxp = target_ctx; if (!DECL_P (expr) && TREE_CODE (expr) != TARGET_EXPR) OMP_CLAUSE_NUM_TEAMS_LOWER_EXPR (c) = num_teams_lower; } } } } else if (OMP_CLAUSE_CODE (c) == OMP_CLAUSE_THREAD_LIMIT) { p = &thread_limit; thread_limit_loc = OMP_CLAUSE_LOCATION (c); } else continue; expr = OMP_CLAUSE_OPERAND (c, 0); if (TREE_CODE (expr) == INTEGER_CST) { *p = expr; continue; } if (walk_tree (&expr, computable_teams_clause, NULL, NULL)) { *p = integer_minus_one_node; continue; } *p = expr; gimplify_omp_ctxp = gimplify_omp_ctxp->outer_context; if (gimplify_expr (p, pre_p, NULL, is_gimple_val, fb_rvalue, false) == GS_ERROR) { gimplify_omp_ctxp = target_ctx; *p = integer_minus_one_node; continue; } gimplify_omp_ctxp = target_ctx; if (!DECL_P (expr) && TREE_CODE (expr) != TARGET_EXPR) OMP_CLAUSE_OPERAND (c, 0) = *p; } if (!omp_find_clause (OMP_TARGET_CLAUSES (target), OMP_CLAUSE_THREAD_LIMIT)) { c = build_omp_clause (thread_limit_loc, OMP_CLAUSE_THREAD_LIMIT); OMP_CLAUSE_THREAD_LIMIT_EXPR (c) = thread_limit; OMP_CLAUSE_CHAIN (c) = OMP_TARGET_CLAUSES (target); OMP_TARGET_CLAUSES (target) = c; } c = build_omp_clause (num_teams_loc, OMP_CLAUSE_NUM_TEAMS); OMP_CLAUSE_NUM_TEAMS_UPPER_EXPR (c) = num_teams_upper; OMP_CLAUSE_NUM_TEAMS_LOWER_EXPR (c) = num_teams_lower; OMP_CLAUSE_CHAIN (c) = OMP_TARGET_CLAUSES (target); OMP_TARGET_CLAUSES (target) = c; } /* Gimplify the gross structure of several OMP constructs. */ static void gimplify_omp_workshare (tree *expr_p, gimple_seq *pre_p) { tree expr = *expr_p; gimple *stmt; gimple_seq body = NULL; enum omp_region_type ort; switch (TREE_CODE (expr)) { case OMP_SECTIONS: case OMP_SINGLE: ort = ORT_WORKSHARE; break; case OMP_SCOPE: ort = ORT_TASKGROUP; break; case OMP_TARGET: ort = OMP_TARGET_COMBINED (expr) ? ORT_COMBINED_TARGET : ORT_TARGET; break; case OACC_KERNELS: ort = ORT_ACC_KERNELS; break; case OACC_PARALLEL: ort = ORT_ACC_PARALLEL; break; case OACC_SERIAL: ort = ORT_ACC_SERIAL; break; case OACC_DATA: ort = ORT_ACC_DATA; break; case OMP_TARGET_DATA: ort = ORT_TARGET_DATA; break; case OMP_TEAMS: ort = OMP_TEAMS_COMBINED (expr) ? ORT_COMBINED_TEAMS : ORT_TEAMS; if (gimplify_omp_ctxp == NULL || gimplify_omp_ctxp->region_type == ORT_IMPLICIT_TARGET) ort = (enum omp_region_type) (ort | ORT_HOST_TEAMS); break; case OACC_HOST_DATA: ort = ORT_ACC_HOST_DATA; break; default: gcc_unreachable (); } bool save_in_omp_construct = in_omp_construct; if ((ort & ORT_ACC) == 0) in_omp_construct = false; gimplify_scan_omp_clauses (&OMP_CLAUSES (expr), pre_p, ort, TREE_CODE (expr)); if (TREE_CODE (expr) == OMP_TARGET) optimize_target_teams (expr, pre_p); if ((ort & (ORT_TARGET | ORT_TARGET_DATA)) != 0 || (ort & ORT_HOST_TEAMS) == ORT_HOST_TEAMS) { push_gimplify_context (); gimple *g = gimplify_and_return_first (OMP_BODY (expr), &body); if (gimple_code (g) == GIMPLE_BIND) pop_gimplify_context (g); else pop_gimplify_context (NULL); if ((ort & ORT_TARGET_DATA) != 0) { enum built_in_function end_ix; switch (TREE_CODE (expr)) { case OACC_DATA: case OACC_HOST_DATA: end_ix = BUILT_IN_GOACC_DATA_END; break; case OMP_TARGET_DATA: end_ix = BUILT_IN_GOMP_TARGET_END_DATA; break; default: gcc_unreachable (); } tree fn = builtin_decl_explicit (end_ix); g = gimple_build_call (fn, 0); gimple_seq cleanup = NULL; gimple_seq_add_stmt (&cleanup, g); g = gimple_build_try (body, cleanup, GIMPLE_TRY_FINALLY); body = NULL; gimple_seq_add_stmt (&body, g); } } else gimplify_and_add (OMP_BODY (expr), &body); gimplify_adjust_omp_clauses (pre_p, body, &OMP_CLAUSES (expr), TREE_CODE (expr)); in_omp_construct = save_in_omp_construct; switch (TREE_CODE (expr)) { case OACC_DATA: stmt = gimple_build_omp_target (body, GF_OMP_TARGET_KIND_OACC_DATA, OMP_CLAUSES (expr)); break; case OACC_HOST_DATA: if (omp_find_clause (OMP_CLAUSES (expr), OMP_CLAUSE_IF_PRESENT)) { for (tree c = OMP_CLAUSES (expr); c; c = OMP_CLAUSE_CHAIN (c)) if (OMP_CLAUSE_CODE (c) == OMP_CLAUSE_USE_DEVICE_PTR) OMP_CLAUSE_USE_DEVICE_PTR_IF_PRESENT (c) = 1; } stmt = gimple_build_omp_target (body, GF_OMP_TARGET_KIND_OACC_HOST_DATA, OMP_CLAUSES (expr)); break; case OACC_KERNELS: stmt = gimple_build_omp_target (body, GF_OMP_TARGET_KIND_OACC_KERNELS, OMP_CLAUSES (expr)); break; case OACC_PARALLEL: stmt = gimple_build_omp_target (body, GF_OMP_TARGET_KIND_OACC_PARALLEL, OMP_CLAUSES (expr)); break; case OACC_SERIAL: stmt = gimple_build_omp_target (body, GF_OMP_TARGET_KIND_OACC_SERIAL, OMP_CLAUSES (expr)); break; case OMP_SECTIONS: stmt = gimple_build_omp_sections (body, OMP_CLAUSES (expr)); break; case OMP_SINGLE: stmt = gimple_build_omp_single (body, OMP_CLAUSES (expr)); break; case OMP_SCOPE: stmt = gimple_build_omp_scope (body, OMP_CLAUSES (expr)); break; case OMP_TARGET: stmt = gimple_build_omp_target (body, GF_OMP_TARGET_KIND_REGION, OMP_CLAUSES (expr)); break; case OMP_TARGET_DATA: /* Put use_device_{ptr,addr} clauses last, as map clauses are supposed to be evaluated before the use_device_{ptr,addr} clauses if they refer to the same variables. */ { tree use_device_clauses; tree *pc, *uc = &use_device_clauses; for (pc = &OMP_CLAUSES (expr); *pc; ) if (OMP_CLAUSE_CODE (*pc) == OMP_CLAUSE_USE_DEVICE_PTR || OMP_CLAUSE_CODE (*pc) == OMP_CLAUSE_USE_DEVICE_ADDR) { *uc = *pc; *pc = OMP_CLAUSE_CHAIN (*pc); uc = &OMP_CLAUSE_CHAIN (*uc); } else pc = &OMP_CLAUSE_CHAIN (*pc); *uc = NULL_TREE; *pc = use_device_clauses; stmt = gimple_build_omp_target (body, GF_OMP_TARGET_KIND_DATA, OMP_CLAUSES (expr)); } break; case OMP_TEAMS: stmt = gimple_build_omp_teams (body, OMP_CLAUSES (expr)); if ((ort & ORT_HOST_TEAMS) == ORT_HOST_TEAMS) gimple_omp_teams_set_host (as_a (stmt), true); break; default: gcc_unreachable (); } gimplify_seq_add_stmt (pre_p, stmt); *expr_p = NULL_TREE; } /* Gimplify the gross structure of OpenACC enter/exit data, update, and OpenMP target update constructs. */ static void gimplify_omp_target_update (tree *expr_p, gimple_seq *pre_p) { tree expr = *expr_p; int kind; gomp_target *stmt; enum omp_region_type ort = ORT_WORKSHARE; switch (TREE_CODE (expr)) { case OACC_ENTER_DATA: kind = GF_OMP_TARGET_KIND_OACC_ENTER_DATA; ort = ORT_ACC; break; case OACC_EXIT_DATA: kind = GF_OMP_TARGET_KIND_OACC_EXIT_DATA; ort = ORT_ACC; break; case OACC_UPDATE: kind = GF_OMP_TARGET_KIND_OACC_UPDATE; ort = ORT_ACC; break; case OMP_TARGET_UPDATE: kind = GF_OMP_TARGET_KIND_UPDATE; break; case OMP_TARGET_ENTER_DATA: kind = GF_OMP_TARGET_KIND_ENTER_DATA; break; case OMP_TARGET_EXIT_DATA: kind = GF_OMP_TARGET_KIND_EXIT_DATA; break; default: gcc_unreachable (); } gimplify_scan_omp_clauses (&OMP_STANDALONE_CLAUSES (expr), pre_p, ort, TREE_CODE (expr)); gimplify_adjust_omp_clauses (pre_p, NULL, &OMP_STANDALONE_CLAUSES (expr), TREE_CODE (expr)); if (TREE_CODE (expr) == OACC_UPDATE && omp_find_clause (OMP_STANDALONE_CLAUSES (expr), OMP_CLAUSE_IF_PRESENT)) { /* The runtime uses GOMP_MAP_{TO,FROM} to denote the if_present clause. */ for (tree c = OMP_STANDALONE_CLAUSES (expr); c; c = OMP_CLAUSE_CHAIN (c)) if (OMP_CLAUSE_CODE (c) == OMP_CLAUSE_MAP) switch (OMP_CLAUSE_MAP_KIND (c)) { case GOMP_MAP_FORCE_TO: OMP_CLAUSE_SET_MAP_KIND (c, GOMP_MAP_TO); break; case GOMP_MAP_FORCE_FROM: OMP_CLAUSE_SET_MAP_KIND (c, GOMP_MAP_FROM); break; default: break; } } else if (TREE_CODE (expr) == OACC_EXIT_DATA && omp_find_clause (OMP_STANDALONE_CLAUSES (expr), OMP_CLAUSE_FINALIZE)) { /* Use GOMP_MAP_DELETE/GOMP_MAP_FORCE_FROM to denote "finalize" semantics. */ bool have_clause = false; for (tree c = OMP_STANDALONE_CLAUSES (expr); c; c = OMP_CLAUSE_CHAIN (c)) if (OMP_CLAUSE_CODE (c) == OMP_CLAUSE_MAP) switch (OMP_CLAUSE_MAP_KIND (c)) { case GOMP_MAP_FROM: OMP_CLAUSE_SET_MAP_KIND (c, GOMP_MAP_FORCE_FROM); have_clause = true; break; case GOMP_MAP_RELEASE: OMP_CLAUSE_SET_MAP_KIND (c, GOMP_MAP_DELETE); have_clause = true; break; case GOMP_MAP_TO_PSET: /* Fortran arrays with descriptors must map that descriptor when doing standalone "attach" operations (in OpenACC). In that case GOMP_MAP_TO_PSET appears by itself with no preceding clause (see trans-openmp.cc:gfc_trans_omp_clauses). */ break; case GOMP_MAP_POINTER: /* TODO PR92929: we may see these here, but they'll always follow one of the clauses above, and will be handled by libgomp as one group, so no handling required here. */ gcc_assert (have_clause); break; case GOMP_MAP_DETACH: OMP_CLAUSE_SET_MAP_KIND (c, GOMP_MAP_FORCE_DETACH); have_clause = false; break; case GOMP_MAP_STRUCT: have_clause = false; break; default: gcc_unreachable (); } } stmt = gimple_build_omp_target (NULL, kind, OMP_STANDALONE_CLAUSES (expr)); gimplify_seq_add_stmt (pre_p, stmt); *expr_p = NULL_TREE; } /* A subroutine of gimplify_omp_atomic. The front end is supposed to have stabilized the lhs of the atomic operation as *ADDR. Return true if EXPR is this stabilized form. */ static bool goa_lhs_expr_p (tree expr, tree addr) { /* Also include casts to other type variants. The C front end is fond of adding these for e.g. volatile variables. This is like STRIP_TYPE_NOPS but includes the main variant lookup. */ STRIP_USELESS_TYPE_CONVERSION (expr); if (TREE_CODE (expr) == INDIRECT_REF) { expr = TREE_OPERAND (expr, 0); while (expr != addr && (CONVERT_EXPR_P (expr) || TREE_CODE (expr) == NON_LVALUE_EXPR) && TREE_CODE (expr) == TREE_CODE (addr) && types_compatible_p (TREE_TYPE (expr), TREE_TYPE (addr))) { expr = TREE_OPERAND (expr, 0); addr = TREE_OPERAND (addr, 0); } if (expr == addr) return true; return (TREE_CODE (addr) == ADDR_EXPR && TREE_CODE (expr) == ADDR_EXPR && TREE_OPERAND (addr, 0) == TREE_OPERAND (expr, 0)); } if (TREE_CODE (addr) == ADDR_EXPR && expr == TREE_OPERAND (addr, 0)) return true; return false; } /* Walk *EXPR_P and replace appearances of *LHS_ADDR with LHS_VAR. If an expression does not involve the lhs, evaluate it into a temporary. Return 1 if the lhs appeared as a subexpression, 0 if it did not, or -1 if an error was encountered. */ static int goa_stabilize_expr (tree *expr_p, gimple_seq *pre_p, tree lhs_addr, tree lhs_var, tree &target_expr, bool rhs, int depth) { tree expr = *expr_p; int saw_lhs = 0; if (goa_lhs_expr_p (expr, lhs_addr)) { if (pre_p) *expr_p = lhs_var; return 1; } if (is_gimple_val (expr)) return 0; /* Maximum depth of lhs in expression is for the __builtin_clear_padding (...), __builtin_clear_padding (...), __builtin_memcmp (&TARGET_EXPR , ...) == 0 ? ... : lhs; */ if (++depth > 7) goto finish; switch (TREE_CODE_CLASS (TREE_CODE (expr))) { case tcc_binary: case tcc_comparison: saw_lhs |= goa_stabilize_expr (&TREE_OPERAND (expr, 1), pre_p, lhs_addr, lhs_var, target_expr, true, depth); /* FALLTHRU */ case tcc_unary: saw_lhs |= goa_stabilize_expr (&TREE_OPERAND (expr, 0), pre_p, lhs_addr, lhs_var, target_expr, true, depth); break; case tcc_expression: switch (TREE_CODE (expr)) { case TRUTH_ANDIF_EXPR: case TRUTH_ORIF_EXPR: case TRUTH_AND_EXPR: case TRUTH_OR_EXPR: case TRUTH_XOR_EXPR: case BIT_INSERT_EXPR: saw_lhs |= goa_stabilize_expr (&TREE_OPERAND (expr, 1), pre_p, lhs_addr, lhs_var, target_expr, true, depth); /* FALLTHRU */ case TRUTH_NOT_EXPR: saw_lhs |= goa_stabilize_expr (&TREE_OPERAND (expr, 0), pre_p, lhs_addr, lhs_var, target_expr, true, depth); break; case MODIFY_EXPR: if (pre_p && !goa_stabilize_expr (expr_p, NULL, lhs_addr, lhs_var, target_expr, true, depth)) break; saw_lhs |= goa_stabilize_expr (&TREE_OPERAND (expr, 1), pre_p, lhs_addr, lhs_var, target_expr, true, depth); saw_lhs |= goa_stabilize_expr (&TREE_OPERAND (expr, 0), pre_p, lhs_addr, lhs_var, target_expr, false, depth); break; /* FALLTHRU */ case ADDR_EXPR: if (pre_p && !goa_stabilize_expr (expr_p, NULL, lhs_addr, lhs_var, target_expr, true, depth)) break; saw_lhs |= goa_stabilize_expr (&TREE_OPERAND (expr, 0), pre_p, lhs_addr, lhs_var, target_expr, false, depth); break; case COMPOUND_EXPR: /* Break out any preevaluations from cp_build_modify_expr. */ for (; TREE_CODE (expr) == COMPOUND_EXPR; expr = TREE_OPERAND (expr, 1)) { /* Special-case __builtin_clear_padding call before __builtin_memcmp. */ if (TREE_CODE (TREE_OPERAND (expr, 0)) == CALL_EXPR) { tree fndecl = get_callee_fndecl (TREE_OPERAND (expr, 0)); if (fndecl && fndecl_built_in_p (fndecl, BUILT_IN_CLEAR_PADDING) && VOID_TYPE_P (TREE_TYPE (TREE_OPERAND (expr, 0))) && (!pre_p || goa_stabilize_expr (&TREE_OPERAND (expr, 0), NULL, lhs_addr, lhs_var, target_expr, true, depth))) { if (pre_p) *expr_p = expr; saw_lhs = goa_stabilize_expr (&TREE_OPERAND (expr, 0), pre_p, lhs_addr, lhs_var, target_expr, true, depth); saw_lhs |= goa_stabilize_expr (&TREE_OPERAND (expr, 1), pre_p, lhs_addr, lhs_var, target_expr, rhs, depth); return saw_lhs; } } if (pre_p) gimplify_stmt (&TREE_OPERAND (expr, 0), pre_p); } if (!pre_p) return goa_stabilize_expr (&expr, pre_p, lhs_addr, lhs_var, target_expr, rhs, depth); *expr_p = expr; return goa_stabilize_expr (expr_p, pre_p, lhs_addr, lhs_var, target_expr, rhs, depth); case COND_EXPR: if (!goa_stabilize_expr (&TREE_OPERAND (expr, 0), NULL, lhs_addr, lhs_var, target_expr, true, depth)) break; saw_lhs |= goa_stabilize_expr (&TREE_OPERAND (expr, 0), pre_p, lhs_addr, lhs_var, target_expr, true, depth); saw_lhs |= goa_stabilize_expr (&TREE_OPERAND (expr, 1), pre_p, lhs_addr, lhs_var, target_expr, true, depth); saw_lhs |= goa_stabilize_expr (&TREE_OPERAND (expr, 2), pre_p, lhs_addr, lhs_var, target_expr, true, depth); break; case TARGET_EXPR: if (TARGET_EXPR_INITIAL (expr)) { if (pre_p && !goa_stabilize_expr (expr_p, NULL, lhs_addr, lhs_var, target_expr, true, depth)) break; if (expr == target_expr) saw_lhs = 1; else { saw_lhs = goa_stabilize_expr (&TARGET_EXPR_INITIAL (expr), pre_p, lhs_addr, lhs_var, target_expr, true, depth); if (saw_lhs && target_expr == NULL_TREE && pre_p) target_expr = expr; } } break; default: break; } break; case tcc_reference: if (TREE_CODE (expr) == BIT_FIELD_REF || TREE_CODE (expr) == VIEW_CONVERT_EXPR) saw_lhs |= goa_stabilize_expr (&TREE_OPERAND (expr, 0), pre_p, lhs_addr, lhs_var, target_expr, true, depth); break; case tcc_vl_exp: if (TREE_CODE (expr) == CALL_EXPR) { if (tree fndecl = get_callee_fndecl (expr)) if (fndecl_built_in_p (fndecl, BUILT_IN_CLEAR_PADDING) || fndecl_built_in_p (fndecl, BUILT_IN_MEMCMP)) { int nargs = call_expr_nargs (expr); for (int i = 0; i < nargs; i++) saw_lhs |= goa_stabilize_expr (&CALL_EXPR_ARG (expr, i), pre_p, lhs_addr, lhs_var, target_expr, true, depth); } } break; default: break; } finish: if (saw_lhs == 0 && pre_p) { enum gimplify_status gs; if (TREE_CODE (expr) == CALL_EXPR && VOID_TYPE_P (TREE_TYPE (expr))) { gimplify_stmt (&expr, pre_p); return saw_lhs; } else if (rhs) gs = gimplify_expr (expr_p, pre_p, NULL, is_gimple_val, fb_rvalue); else gs = gimplify_expr (expr_p, pre_p, NULL, is_gimple_lvalue, fb_lvalue); if (gs != GS_ALL_DONE) saw_lhs = -1; } return saw_lhs; } /* Gimplify an OMP_ATOMIC statement. */ static enum gimplify_status gimplify_omp_atomic (tree *expr_p, gimple_seq *pre_p) { tree addr = TREE_OPERAND (*expr_p, 0); tree rhs = TREE_CODE (*expr_p) == OMP_ATOMIC_READ ? NULL : TREE_OPERAND (*expr_p, 1); tree type = TYPE_MAIN_VARIANT (TREE_TYPE (TREE_TYPE (addr))); tree tmp_load; gomp_atomic_load *loadstmt; gomp_atomic_store *storestmt; tree target_expr = NULL_TREE; tmp_load = create_tmp_reg (type); if (rhs && goa_stabilize_expr (&rhs, pre_p, addr, tmp_load, target_expr, true, 0) < 0) return GS_ERROR; if (gimplify_expr (&addr, pre_p, NULL, is_gimple_val, fb_rvalue) != GS_ALL_DONE) return GS_ERROR; loadstmt = gimple_build_omp_atomic_load (tmp_load, addr, OMP_ATOMIC_MEMORY_ORDER (*expr_p)); gimplify_seq_add_stmt (pre_p, loadstmt); if (rhs) { /* BIT_INSERT_EXPR is not valid for non-integral bitfield representatives. Use BIT_FIELD_REF on the lhs instead. */ tree rhsarg = rhs; if (TREE_CODE (rhs) == COND_EXPR) rhsarg = TREE_OPERAND (rhs, 1); if (TREE_CODE (rhsarg) == BIT_INSERT_EXPR && !INTEGRAL_TYPE_P (TREE_TYPE (tmp_load))) { tree bitpos = TREE_OPERAND (rhsarg, 2); tree op1 = TREE_OPERAND (rhsarg, 1); tree bitsize; tree tmp_store = tmp_load; if (TREE_CODE (*expr_p) == OMP_ATOMIC_CAPTURE_OLD) tmp_store = get_initialized_tmp_var (tmp_load, pre_p); if (INTEGRAL_TYPE_P (TREE_TYPE (op1))) bitsize = bitsize_int (TYPE_PRECISION (TREE_TYPE (op1))); else bitsize = TYPE_SIZE (TREE_TYPE (op1)); gcc_assert (TREE_OPERAND (rhsarg, 0) == tmp_load); tree t = build2_loc (EXPR_LOCATION (rhsarg), MODIFY_EXPR, void_type_node, build3_loc (EXPR_LOCATION (rhsarg), BIT_FIELD_REF, TREE_TYPE (op1), tmp_store, bitsize, bitpos), op1); if (TREE_CODE (rhs) == COND_EXPR) t = build3_loc (EXPR_LOCATION (rhs), COND_EXPR, void_type_node, TREE_OPERAND (rhs, 0), t, void_node); gimplify_and_add (t, pre_p); rhs = tmp_store; } bool save_allow_rhs_cond_expr = gimplify_ctxp->allow_rhs_cond_expr; if (TREE_CODE (rhs) == COND_EXPR) gimplify_ctxp->allow_rhs_cond_expr = true; enum gimplify_status gs = gimplify_expr (&rhs, pre_p, NULL, is_gimple_val, fb_rvalue); gimplify_ctxp->allow_rhs_cond_expr = save_allow_rhs_cond_expr; if (gs != GS_ALL_DONE) return GS_ERROR; } if (TREE_CODE (*expr_p) == OMP_ATOMIC_READ) rhs = tmp_load; storestmt = gimple_build_omp_atomic_store (rhs, OMP_ATOMIC_MEMORY_ORDER (*expr_p)); if (TREE_CODE (*expr_p) != OMP_ATOMIC_READ && OMP_ATOMIC_WEAK (*expr_p)) { gimple_omp_atomic_set_weak (loadstmt); gimple_omp_atomic_set_weak (storestmt); } gimplify_seq_add_stmt (pre_p, storestmt); switch (TREE_CODE (*expr_p)) { case OMP_ATOMIC_READ: case OMP_ATOMIC_CAPTURE_OLD: *expr_p = tmp_load; gimple_omp_atomic_set_need_value (loadstmt); break; case OMP_ATOMIC_CAPTURE_NEW: *expr_p = rhs; gimple_omp_atomic_set_need_value (storestmt); break; default: *expr_p = NULL; break; } return GS_ALL_DONE; } /* Gimplify a TRANSACTION_EXPR. This involves gimplification of the body, and adding some EH bits. */ static enum gimplify_status gimplify_transaction (tree *expr_p, gimple_seq *pre_p) { tree expr = *expr_p, temp, tbody = TRANSACTION_EXPR_BODY (expr); gimple *body_stmt; gtransaction *trans_stmt; gimple_seq body = NULL; int subcode = 0; /* Wrap the transaction body in a BIND_EXPR so we have a context where to put decls for OMP. */ if (TREE_CODE (tbody) != BIND_EXPR) { tree bind = build3 (BIND_EXPR, void_type_node, NULL, tbody, NULL); TREE_SIDE_EFFECTS (bind) = 1; SET_EXPR_LOCATION (bind, EXPR_LOCATION (tbody)); TRANSACTION_EXPR_BODY (expr) = bind; } push_gimplify_context (); temp = voidify_wrapper_expr (*expr_p, NULL); body_stmt = gimplify_and_return_first (TRANSACTION_EXPR_BODY (expr), &body); pop_gimplify_context (body_stmt); trans_stmt = gimple_build_transaction (body); if (TRANSACTION_EXPR_OUTER (expr)) subcode = GTMA_IS_OUTER; else if (TRANSACTION_EXPR_RELAXED (expr)) subcode = GTMA_IS_RELAXED; gimple_transaction_set_subcode (trans_stmt, subcode); gimplify_seq_add_stmt (pre_p, trans_stmt); if (temp) { *expr_p = temp; return GS_OK; } *expr_p = NULL_TREE; return GS_ALL_DONE; } /* Gimplify an OMP_ORDERED construct. EXPR is the tree version. BODY is the OMP_BODY of the original EXPR (which has already been gimplified so it's not present in the EXPR). Return the gimplified GIMPLE_OMP_ORDERED tuple. */ static gimple * gimplify_omp_ordered (tree expr, gimple_seq body) { tree c, decls; int failures = 0; unsigned int i; tree source_c = NULL_TREE; tree sink_c = NULL_TREE; if (gimplify_omp_ctxp) { for (c = OMP_ORDERED_CLAUSES (expr); c; c = OMP_CLAUSE_CHAIN (c)) if (OMP_CLAUSE_CODE (c) == OMP_CLAUSE_DEPEND && gimplify_omp_ctxp->loop_iter_var.is_empty () && (OMP_CLAUSE_DEPEND_KIND (c) == OMP_CLAUSE_DEPEND_SINK || OMP_CLAUSE_DEPEND_KIND (c) == OMP_CLAUSE_DEPEND_SOURCE)) { error_at (OMP_CLAUSE_LOCATION (c), "% construct with % clause must be " "closely nested inside a loop with % clause " "with a parameter"); failures++; } else if (OMP_CLAUSE_CODE (c) == OMP_CLAUSE_DEPEND && OMP_CLAUSE_DEPEND_KIND (c) == OMP_CLAUSE_DEPEND_SINK) { bool fail = false; for (decls = OMP_CLAUSE_DECL (c), i = 0; decls && TREE_CODE (decls) == TREE_LIST; decls = TREE_CHAIN (decls), ++i) if (i >= gimplify_omp_ctxp->loop_iter_var.length () / 2) continue; else if (TREE_VALUE (decls) != gimplify_omp_ctxp->loop_iter_var[2 * i]) { error_at (OMP_CLAUSE_LOCATION (c), "variable %qE is not an iteration " "of outermost loop %d, expected %qE", TREE_VALUE (decls), i + 1, gimplify_omp_ctxp->loop_iter_var[2 * i]); fail = true; failures++; } else TREE_VALUE (decls) = gimplify_omp_ctxp->loop_iter_var[2 * i + 1]; if (!fail && i != gimplify_omp_ctxp->loop_iter_var.length () / 2) { error_at (OMP_CLAUSE_LOCATION (c), "number of variables in % clause with " "% modifier does not match number of " "iteration variables"); failures++; } sink_c = c; } else if (OMP_CLAUSE_CODE (c) == OMP_CLAUSE_DEPEND && OMP_CLAUSE_DEPEND_KIND (c) == OMP_CLAUSE_DEPEND_SOURCE) { if (source_c) { error_at (OMP_CLAUSE_LOCATION (c), "more than one % clause with % " "modifier on an % construct"); failures++; } else source_c = c; } } if (source_c && sink_c) { error_at (OMP_CLAUSE_LOCATION (source_c), "% clause with % modifier specified " "together with % clauses with % modifier " "on the same construct"); failures++; } if (failures) return gimple_build_nop (); return gimple_build_omp_ordered (body, OMP_ORDERED_CLAUSES (expr)); } /* Convert the GENERIC expression tree *EXPR_P to GIMPLE. If the expression produces a value to be used as an operand inside a GIMPLE statement, the value will be stored back in *EXPR_P. This value will be a tree of class tcc_declaration, tcc_constant, tcc_reference or an SSA_NAME. The corresponding sequence of GIMPLE statements is emitted in PRE_P and POST_P. Additionally, this process may overwrite parts of the input expression during gimplification. Ideally, it should be possible to do non-destructive gimplification. EXPR_P points to the GENERIC expression to convert to GIMPLE. If the expression needs to evaluate to a value to be used as an operand in a GIMPLE statement, this value will be stored in *EXPR_P on exit. This happens when the caller specifies one of fb_lvalue or fb_rvalue fallback flags. PRE_P will contain the sequence of GIMPLE statements corresponding to the evaluation of EXPR and all the side-effects that must be executed before the main expression. On exit, the last statement of PRE_P is the core statement being gimplified. For instance, when gimplifying 'if (++a)' the last statement in PRE_P will be 'if (t.1)' where t.1 is the result of pre-incrementing 'a'. POST_P will contain the sequence of GIMPLE statements corresponding to the evaluation of all the side-effects that must be executed after the main expression. If this is NULL, the post side-effects are stored at the end of PRE_P. The reason why the output is split in two is to handle post side-effects explicitly. In some cases, an expression may have inner and outer post side-effects which need to be emitted in an order different from the one given by the recursive traversal. For instance, for the expression (*p--)++ the post side-effects of '--' must actually occur *after* the post side-effects of '++'. However, gimplification will first visit the inner expression, so if a separate POST sequence was not used, the resulting sequence would be: 1 t.1 = *p 2 p = p - 1 3 t.2 = t.1 + 1 4 *p = t.2 However, the post-decrement operation in line #2 must not be evaluated until after the store to *p at line #4, so the correct sequence should be: 1 t.1 = *p 2 t.2 = t.1 + 1 3 *p = t.2 4 p = p - 1 So, by specifying a separate post queue, it is possible to emit the post side-effects in the correct order. If POST_P is NULL, an internal queue will be used. Before returning to the caller, the sequence POST_P is appended to the main output sequence PRE_P. GIMPLE_TEST_F points to a function that takes a tree T and returns nonzero if T is in the GIMPLE form requested by the caller. The GIMPLE predicates are in gimple.cc. FALLBACK tells the function what sort of a temporary we want if gimplification cannot produce an expression that complies with GIMPLE_TEST_F. fb_none means that no temporary should be generated fb_rvalue means that an rvalue is OK to generate fb_lvalue means that an lvalue is OK to generate fb_either means that either is OK, but an lvalue is preferable. fb_mayfail means that gimplification may fail (in which case GS_ERROR will be returned) The return value is either GS_ERROR or GS_ALL_DONE, since this function iterates until EXPR is completely gimplified or an error occurs. */ enum gimplify_status gimplify_expr (tree *expr_p, gimple_seq *pre_p, gimple_seq *post_p, bool (*gimple_test_f) (tree), fallback_t fallback) { tree tmp; gimple_seq internal_pre = NULL; gimple_seq internal_post = NULL; tree save_expr; bool is_statement; location_t saved_location; enum gimplify_status ret; gimple_stmt_iterator pre_last_gsi, post_last_gsi; tree label; save_expr = *expr_p; if (save_expr == NULL_TREE) return GS_ALL_DONE; /* If we are gimplifying a top-level statement, PRE_P must be valid. */ is_statement = gimple_test_f == is_gimple_stmt; if (is_statement) gcc_assert (pre_p); /* Consistency checks. */ if (gimple_test_f == is_gimple_reg) gcc_assert (fallback & (fb_rvalue | fb_lvalue)); else if (gimple_test_f == is_gimple_val || gimple_test_f == is_gimple_call_addr || gimple_test_f == is_gimple_condexpr || gimple_test_f == is_gimple_condexpr_for_cond || gimple_test_f == is_gimple_mem_rhs || gimple_test_f == is_gimple_mem_rhs_or_call || gimple_test_f == is_gimple_reg_rhs || gimple_test_f == is_gimple_reg_rhs_or_call || gimple_test_f == is_gimple_asm_val || gimple_test_f == is_gimple_mem_ref_addr) gcc_assert (fallback & fb_rvalue); else if (gimple_test_f == is_gimple_min_lval || gimple_test_f == is_gimple_lvalue) gcc_assert (fallback & fb_lvalue); else if (gimple_test_f == is_gimple_addressable) gcc_assert (fallback & fb_either); else if (gimple_test_f == is_gimple_stmt) gcc_assert (fallback == fb_none); else { /* We should have recognized the GIMPLE_TEST_F predicate to know what kind of fallback to use in case a temporary is needed to hold the value or address of *EXPR_P. */ gcc_unreachable (); } /* We used to check the predicate here and return immediately if it succeeds. This is wrong; the design is for gimplification to be idempotent, and for the predicates to only test for valid forms, not whether they are fully simplified. */ if (pre_p == NULL) pre_p = &internal_pre; if (post_p == NULL) post_p = &internal_post; /* Remember the last statements added to PRE_P and POST_P. Every new statement added by the gimplification helpers needs to be annotated with location information. To centralize the responsibility, we remember the last statement that had been added to both queues before gimplifying *EXPR_P. If gimplification produces new statements in PRE_P and POST_P, those statements will be annotated with the same location information as *EXPR_P. */ pre_last_gsi = gsi_last (*pre_p); post_last_gsi = gsi_last (*post_p); saved_location = input_location; if (save_expr != error_mark_node && EXPR_HAS_LOCATION (*expr_p)) input_location = EXPR_LOCATION (*expr_p); /* Loop over the specific gimplifiers until the toplevel node remains the same. */ do { /* Strip away as many useless type conversions as possible at the toplevel. */ STRIP_USELESS_TYPE_CONVERSION (*expr_p); /* Remember the expr. */ save_expr = *expr_p; /* Die, die, die, my darling. */ if (error_operand_p (save_expr)) { ret = GS_ERROR; break; } /* Do any language-specific gimplification. */ ret = ((enum gimplify_status) lang_hooks.gimplify_expr (expr_p, pre_p, post_p)); if (ret == GS_OK) { if (*expr_p == NULL_TREE) break; if (*expr_p != save_expr) continue; } else if (ret != GS_UNHANDLED) break; /* Make sure that all the cases set 'ret' appropriately. */ ret = GS_UNHANDLED; switch (TREE_CODE (*expr_p)) { /* First deal with the special cases. */ case POSTINCREMENT_EXPR: case POSTDECREMENT_EXPR: case PREINCREMENT_EXPR: case PREDECREMENT_EXPR: ret = gimplify_self_mod_expr (expr_p, pre_p, post_p, fallback != fb_none, TREE_TYPE (*expr_p)); break; case VIEW_CONVERT_EXPR: if ((fallback & fb_rvalue) && is_gimple_reg_type (TREE_TYPE (*expr_p)) && is_gimple_reg_type (TREE_TYPE (TREE_OPERAND (*expr_p, 0)))) { ret = gimplify_expr (&TREE_OPERAND (*expr_p, 0), pre_p, post_p, is_gimple_val, fb_rvalue); recalculate_side_effects (*expr_p); break; } /* Fallthru. */ case ARRAY_REF: case ARRAY_RANGE_REF: case REALPART_EXPR: case IMAGPART_EXPR: case COMPONENT_REF: ret = gimplify_compound_lval (expr_p, pre_p, post_p, fallback ? fallback : fb_rvalue); break; case COND_EXPR: ret = gimplify_cond_expr (expr_p, pre_p, fallback); /* C99 code may assign to an array in a structure value of a conditional expression, and this has undefined behavior only on execution, so create a temporary if an lvalue is required. */ if (fallback == fb_lvalue) { *expr_p = get_initialized_tmp_var (*expr_p, pre_p, post_p, false); mark_addressable (*expr_p); ret = GS_OK; } break; case CALL_EXPR: ret = gimplify_call_expr (expr_p, pre_p, fallback != fb_none); /* C99 code may assign to an array in a structure returned from a function, and this has undefined behavior only on execution, so create a temporary if an lvalue is required. */ if (fallback == fb_lvalue) { *expr_p = get_initialized_tmp_var (*expr_p, pre_p, post_p, false); mark_addressable (*expr_p); ret = GS_OK; } break; case TREE_LIST: gcc_unreachable (); case COMPOUND_EXPR: ret = gimplify_compound_expr (expr_p, pre_p, fallback != fb_none); break; case COMPOUND_LITERAL_EXPR: ret = gimplify_compound_literal_expr (expr_p, pre_p, gimple_test_f, fallback); break; case MODIFY_EXPR: case INIT_EXPR: ret = gimplify_modify_expr (expr_p, pre_p, post_p, fallback != fb_none); break; case TRUTH_ANDIF_EXPR: case TRUTH_ORIF_EXPR: { /* Preserve the original type of the expression and the source location of the outer expression. */ tree org_type = TREE_TYPE (*expr_p); *expr_p = gimple_boolify (*expr_p); *expr_p = build3_loc (input_location, COND_EXPR, org_type, *expr_p, fold_convert_loc (input_location, org_type, boolean_true_node), fold_convert_loc (input_location, org_type, boolean_false_node)); ret = GS_OK; break; } case TRUTH_NOT_EXPR: { tree type = TREE_TYPE (*expr_p); /* The parsers are careful to generate TRUTH_NOT_EXPR only with operands that are always zero or one. We do not fold here but handle the only interesting case manually, as fold may re-introduce the TRUTH_NOT_EXPR. */ *expr_p = gimple_boolify (*expr_p); if (TYPE_PRECISION (TREE_TYPE (*expr_p)) == 1) *expr_p = build1_loc (input_location, BIT_NOT_EXPR, TREE_TYPE (*expr_p), TREE_OPERAND (*expr_p, 0)); else *expr_p = build2_loc (input_location, BIT_XOR_EXPR, TREE_TYPE (*expr_p), TREE_OPERAND (*expr_p, 0), build_int_cst (TREE_TYPE (*expr_p), 1)); if (!useless_type_conversion_p (type, TREE_TYPE (*expr_p))) *expr_p = fold_convert_loc (input_location, type, *expr_p); ret = GS_OK; break; } case ADDR_EXPR: ret = gimplify_addr_expr (expr_p, pre_p, post_p); break; case ANNOTATE_EXPR: { tree cond = TREE_OPERAND (*expr_p, 0); tree kind = TREE_OPERAND (*expr_p, 1); tree data = TREE_OPERAND (*expr_p, 2); tree type = TREE_TYPE (cond); if (!INTEGRAL_TYPE_P (type)) { *expr_p = cond; ret = GS_OK; break; } tree tmp = create_tmp_var (type); gimplify_arg (&cond, pre_p, EXPR_LOCATION (*expr_p)); gcall *call = gimple_build_call_internal (IFN_ANNOTATE, 3, cond, kind, data); gimple_call_set_lhs (call, tmp); gimplify_seq_add_stmt (pre_p, call); *expr_p = tmp; ret = GS_ALL_DONE; break; } case VA_ARG_EXPR: ret = gimplify_va_arg_expr (expr_p, pre_p, post_p); break; CASE_CONVERT: if (IS_EMPTY_STMT (*expr_p)) { ret = GS_ALL_DONE; break; } if (VOID_TYPE_P (TREE_TYPE (*expr_p)) || fallback == fb_none) { /* Just strip a conversion to void (or in void context) and try again. */ *expr_p = TREE_OPERAND (*expr_p, 0); ret = GS_OK; break; } ret = gimplify_conversion (expr_p); if (ret == GS_ERROR) break; if (*expr_p != save_expr) break; /* FALLTHRU */ case FIX_TRUNC_EXPR: /* unary_expr: ... | '(' cast ')' val | ... */ ret = gimplify_expr (&TREE_OPERAND (*expr_p, 0), pre_p, post_p, is_gimple_val, fb_rvalue); recalculate_side_effects (*expr_p); break; case INDIRECT_REF: { bool volatilep = TREE_THIS_VOLATILE (*expr_p); bool notrap = TREE_THIS_NOTRAP (*expr_p); tree saved_ptr_type = TREE_TYPE (TREE_OPERAND (*expr_p, 0)); *expr_p = fold_indirect_ref_loc (input_location, *expr_p); if (*expr_p != save_expr) { ret = GS_OK; break; } ret = gimplify_expr (&TREE_OPERAND (*expr_p, 0), pre_p, post_p, is_gimple_reg, fb_rvalue); if (ret == GS_ERROR) break; recalculate_side_effects (*expr_p); *expr_p = fold_build2_loc (input_location, MEM_REF, TREE_TYPE (*expr_p), TREE_OPERAND (*expr_p, 0), build_int_cst (saved_ptr_type, 0)); TREE_THIS_VOLATILE (*expr_p) = volatilep; TREE_THIS_NOTRAP (*expr_p) = notrap; ret = GS_OK; break; } /* We arrive here through the various re-gimplifcation paths. */ case MEM_REF: /* First try re-folding the whole thing. */ tmp = fold_binary (MEM_REF, TREE_TYPE (*expr_p), TREE_OPERAND (*expr_p, 0), TREE_OPERAND (*expr_p, 1)); if (tmp) { REF_REVERSE_STORAGE_ORDER (tmp) = REF_REVERSE_STORAGE_ORDER (*expr_p); *expr_p = tmp; recalculate_side_effects (*expr_p); ret = GS_OK; break; } /* Avoid re-gimplifying the address operand if it is already in suitable form. Re-gimplifying would mark the address operand addressable. Always gimplify when not in SSA form as we still may have to gimplify decls with value-exprs. */ if (!gimplify_ctxp || !gimple_in_ssa_p (cfun) || !is_gimple_mem_ref_addr (TREE_OPERAND (*expr_p, 0))) { ret = gimplify_expr (&TREE_OPERAND (*expr_p, 0), pre_p, post_p, is_gimple_mem_ref_addr, fb_rvalue); if (ret == GS_ERROR) break; } recalculate_side_effects (*expr_p); ret = GS_ALL_DONE; break; /* Constants need not be gimplified. */ case INTEGER_CST: case REAL_CST: case FIXED_CST: case STRING_CST: case COMPLEX_CST: case VECTOR_CST: /* Drop the overflow flag on constants, we do not want that in the GIMPLE IL. */ if (TREE_OVERFLOW_P (*expr_p)) *expr_p = drop_tree_overflow (*expr_p); ret = GS_ALL_DONE; break; case CONST_DECL: /* If we require an lvalue, such as for ADDR_EXPR, retain the CONST_DECL node. Otherwise the decl is replaceable by its value. */ /* ??? Should be == fb_lvalue, but ADDR_EXPR passes fb_either. */ if (fallback & fb_lvalue) ret = GS_ALL_DONE; else { *expr_p = DECL_INITIAL (*expr_p); ret = GS_OK; } break; case DECL_EXPR: ret = gimplify_decl_expr (expr_p, pre_p); break; case BIND_EXPR: ret = gimplify_bind_expr (expr_p, pre_p); break; case LOOP_EXPR: ret = gimplify_loop_expr (expr_p, pre_p); break; case SWITCH_EXPR: ret = gimplify_switch_expr (expr_p, pre_p); break; case EXIT_EXPR: ret = gimplify_exit_expr (expr_p); break; case GOTO_EXPR: /* If the target is not LABEL, then it is a computed jump and the target needs to be gimplified. */ if (TREE_CODE (GOTO_DESTINATION (*expr_p)) != LABEL_DECL) { ret = gimplify_expr (&GOTO_DESTINATION (*expr_p), pre_p, NULL, is_gimple_val, fb_rvalue); if (ret == GS_ERROR) break; } gimplify_seq_add_stmt (pre_p, gimple_build_goto (GOTO_DESTINATION (*expr_p))); ret = GS_ALL_DONE; break; case PREDICT_EXPR: gimplify_seq_add_stmt (pre_p, gimple_build_predict (PREDICT_EXPR_PREDICTOR (*expr_p), PREDICT_EXPR_OUTCOME (*expr_p))); ret = GS_ALL_DONE; break; case LABEL_EXPR: ret = gimplify_label_expr (expr_p, pre_p); label = LABEL_EXPR_LABEL (*expr_p); gcc_assert (decl_function_context (label) == current_function_decl); /* If the label is used in a goto statement, or address of the label is taken, we need to unpoison all variables that were seen so far. Doing so would prevent us from reporting a false positives. */ if (asan_poisoned_variables && asan_used_labels != NULL && asan_used_labels->contains (label) && !gimplify_omp_ctxp) asan_poison_variables (asan_poisoned_variables, false, pre_p); break; case CASE_LABEL_EXPR: ret = gimplify_case_label_expr (expr_p, pre_p); if (gimplify_ctxp->live_switch_vars) asan_poison_variables (gimplify_ctxp->live_switch_vars, false, pre_p); break; case RETURN_EXPR: ret = gimplify_return_expr (*expr_p, pre_p); break; case CONSTRUCTOR: /* Don't reduce this in place; let gimplify_init_constructor work its magic. Buf if we're just elaborating this for side effects, just gimplify any element that has side-effects. */ if (fallback == fb_none) { unsigned HOST_WIDE_INT ix; tree val; tree temp = NULL_TREE; FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (*expr_p), ix, val) if (TREE_SIDE_EFFECTS (val)) append_to_statement_list (val, &temp); *expr_p = temp; ret = temp ? GS_OK : GS_ALL_DONE; } /* C99 code may assign to an array in a constructed structure or union, and this has undefined behavior only on execution, so create a temporary if an lvalue is required. */ else if (fallback == fb_lvalue) { *expr_p = get_initialized_tmp_var (*expr_p, pre_p, post_p, false); mark_addressable (*expr_p); ret = GS_OK; } else ret = GS_ALL_DONE; break; /* The following are special cases that are not handled by the original GIMPLE grammar. */ /* SAVE_EXPR nodes are converted into a GIMPLE identifier and eliminated. */ case SAVE_EXPR: ret = gimplify_save_expr (expr_p, pre_p, post_p); break; case BIT_FIELD_REF: ret = gimplify_expr (&TREE_OPERAND (*expr_p, 0), pre_p, post_p, is_gimple_lvalue, fb_either); recalculate_side_effects (*expr_p); break; case TARGET_MEM_REF: { enum gimplify_status r0 = GS_ALL_DONE, r1 = GS_ALL_DONE; if (TMR_BASE (*expr_p)) r0 = gimplify_expr (&TMR_BASE (*expr_p), pre_p, post_p, is_gimple_mem_ref_addr, fb_either); if (TMR_INDEX (*expr_p)) r1 = gimplify_expr (&TMR_INDEX (*expr_p), pre_p, post_p, is_gimple_val, fb_rvalue); if (TMR_INDEX2 (*expr_p)) r1 = gimplify_expr (&TMR_INDEX2 (*expr_p), pre_p, post_p, is_gimple_val, fb_rvalue); /* TMR_STEP and TMR_OFFSET are always integer constants. */ ret = MIN (r0, r1); } break; case NON_LVALUE_EXPR: /* This should have been stripped above. */ gcc_unreachable (); case ASM_EXPR: ret = gimplify_asm_expr (expr_p, pre_p, post_p); break; case TRY_FINALLY_EXPR: case TRY_CATCH_EXPR: { gimple_seq eval, cleanup; gtry *try_; /* Calls to destructors are generated automatically in FINALLY/CATCH block. They should have location as UNKNOWN_LOCATION. However, gimplify_call_expr will reset these call stmts to input_location if it finds stmt's location is unknown. To prevent resetting for destructors, we set the input_location to unknown. Note that this only affects the destructor calls in FINALLY/CATCH block, and will automatically reset to its original value by the end of gimplify_expr. */ input_location = UNKNOWN_LOCATION; eval = cleanup = NULL; gimplify_and_add (TREE_OPERAND (*expr_p, 0), &eval); if (TREE_CODE (*expr_p) == TRY_FINALLY_EXPR && TREE_CODE (TREE_OPERAND (*expr_p, 1)) == EH_ELSE_EXPR) { gimple_seq n = NULL, e = NULL; gimplify_and_add (TREE_OPERAND (TREE_OPERAND (*expr_p, 1), 0), &n); gimplify_and_add (TREE_OPERAND (TREE_OPERAND (*expr_p, 1), 1), &e); if (!gimple_seq_empty_p (n) && !gimple_seq_empty_p (e)) { geh_else *stmt = gimple_build_eh_else (n, e); gimple_seq_add_stmt (&cleanup, stmt); } } else gimplify_and_add (TREE_OPERAND (*expr_p, 1), &cleanup); /* Don't create bogus GIMPLE_TRY with empty cleanup. */ if (gimple_seq_empty_p (cleanup)) { gimple_seq_add_seq (pre_p, eval); ret = GS_ALL_DONE; break; } try_ = gimple_build_try (eval, cleanup, TREE_CODE (*expr_p) == TRY_FINALLY_EXPR ? GIMPLE_TRY_FINALLY : GIMPLE_TRY_CATCH); if (EXPR_HAS_LOCATION (save_expr)) gimple_set_location (try_, EXPR_LOCATION (save_expr)); else if (LOCATION_LOCUS (saved_location) != UNKNOWN_LOCATION) gimple_set_location (try_, saved_location); if (TREE_CODE (*expr_p) == TRY_CATCH_EXPR) gimple_try_set_catch_is_cleanup (try_, TRY_CATCH_IS_CLEANUP (*expr_p)); gimplify_seq_add_stmt (pre_p, try_); ret = GS_ALL_DONE; break; } case CLEANUP_POINT_EXPR: ret = gimplify_cleanup_point_expr (expr_p, pre_p); break; case TARGET_EXPR: ret = gimplify_target_expr (expr_p, pre_p, post_p); break; case CATCH_EXPR: { gimple *c; gimple_seq handler = NULL; gimplify_and_add (CATCH_BODY (*expr_p), &handler); c = gimple_build_catch (CATCH_TYPES (*expr_p), handler); gimplify_seq_add_stmt (pre_p, c); ret = GS_ALL_DONE; break; } case EH_FILTER_EXPR: { gimple *ehf; gimple_seq failure = NULL; gimplify_and_add (EH_FILTER_FAILURE (*expr_p), &failure); ehf = gimple_build_eh_filter (EH_FILTER_TYPES (*expr_p), failure); copy_warning (ehf, *expr_p); gimplify_seq_add_stmt (pre_p, ehf); ret = GS_ALL_DONE; break; } case OBJ_TYPE_REF: { enum gimplify_status r0, r1; r0 = gimplify_expr (&OBJ_TYPE_REF_OBJECT (*expr_p), pre_p, post_p, is_gimple_val, fb_rvalue); r1 = gimplify_expr (&OBJ_TYPE_REF_EXPR (*expr_p), pre_p, post_p, is_gimple_val, fb_rvalue); TREE_SIDE_EFFECTS (*expr_p) = 0; ret = MIN (r0, r1); } break; case LABEL_DECL: /* We get here when taking the address of a label. We mark the label as "forced"; meaning it can never be removed and it is a potential target for any computed goto. */ FORCED_LABEL (*expr_p) = 1; ret = GS_ALL_DONE; break; case STATEMENT_LIST: ret = gimplify_statement_list (expr_p, pre_p); break; case WITH_SIZE_EXPR: { gimplify_expr (&TREE_OPERAND (*expr_p, 0), pre_p, post_p == &internal_post ? NULL : post_p, gimple_test_f, fallback); gimplify_expr (&TREE_OPERAND (*expr_p, 1), pre_p, post_p, is_gimple_val, fb_rvalue); ret = GS_ALL_DONE; } break; case VAR_DECL: case PARM_DECL: ret = gimplify_var_or_parm_decl (expr_p); break; case RESULT_DECL: /* When within an OMP context, notice uses of variables. */ if (gimplify_omp_ctxp) omp_notice_variable (gimplify_omp_ctxp, *expr_p, true); ret = GS_ALL_DONE; break; case DEBUG_EXPR_DECL: gcc_unreachable (); case DEBUG_BEGIN_STMT: gimplify_seq_add_stmt (pre_p, gimple_build_debug_begin_stmt (TREE_BLOCK (*expr_p), EXPR_LOCATION (*expr_p))); ret = GS_ALL_DONE; *expr_p = NULL; break; case SSA_NAME: /* Allow callbacks into the gimplifier during optimization. */ ret = GS_ALL_DONE; break; case OMP_PARALLEL: gimplify_omp_parallel (expr_p, pre_p); ret = GS_ALL_DONE; break; case OMP_TASK: gimplify_omp_task (expr_p, pre_p); ret = GS_ALL_DONE; break; case OMP_SIMD: { /* Temporarily disable into_ssa, as scan_omp_simd which calls copy_gimple_seq_and_replace_locals can't deal with SSA_NAMEs defined outside of the body properly. */ bool saved_into_ssa = gimplify_ctxp->into_ssa; gimplify_ctxp->into_ssa = false; ret = gimplify_omp_for (expr_p, pre_p); gimplify_ctxp->into_ssa = saved_into_ssa; break; } case OMP_FOR: case OMP_DISTRIBUTE: case OMP_TASKLOOP: case OACC_LOOP: ret = gimplify_omp_for (expr_p, pre_p); break; case OMP_LOOP: ret = gimplify_omp_loop (expr_p, pre_p); break; case OACC_CACHE: gimplify_oacc_cache (expr_p, pre_p); ret = GS_ALL_DONE; break; case OACC_DECLARE: gimplify_oacc_declare (expr_p, pre_p); ret = GS_ALL_DONE; break; case OACC_HOST_DATA: case OACC_DATA: case OACC_KERNELS: case OACC_PARALLEL: case OACC_SERIAL: case OMP_SCOPE: case OMP_SECTIONS: case OMP_SINGLE: case OMP_TARGET: case OMP_TARGET_DATA: case OMP_TEAMS: gimplify_omp_workshare (expr_p, pre_p); ret = GS_ALL_DONE; break; case OACC_ENTER_DATA: case OACC_EXIT_DATA: case OACC_UPDATE: case OMP_TARGET_UPDATE: case OMP_TARGET_ENTER_DATA: case OMP_TARGET_EXIT_DATA: gimplify_omp_target_update (expr_p, pre_p); ret = GS_ALL_DONE; break; case OMP_SECTION: case OMP_MASTER: case OMP_MASKED: case OMP_ORDERED: case OMP_CRITICAL: case OMP_SCAN: { gimple_seq body = NULL; gimple *g; bool saved_in_omp_construct = in_omp_construct; in_omp_construct = true; gimplify_and_add (OMP_BODY (*expr_p), &body); in_omp_construct = saved_in_omp_construct; switch (TREE_CODE (*expr_p)) { case OMP_SECTION: g = gimple_build_omp_section (body); break; case OMP_MASTER: g = gimple_build_omp_master (body); break; case OMP_ORDERED: g = gimplify_omp_ordered (*expr_p, body); break; case OMP_MASKED: gimplify_scan_omp_clauses (&OMP_MASKED_CLAUSES (*expr_p), pre_p, ORT_WORKSHARE, OMP_MASKED); gimplify_adjust_omp_clauses (pre_p, body, &OMP_MASKED_CLAUSES (*expr_p), OMP_MASKED); g = gimple_build_omp_masked (body, OMP_MASKED_CLAUSES (*expr_p)); break; case OMP_CRITICAL: gimplify_scan_omp_clauses (&OMP_CRITICAL_CLAUSES (*expr_p), pre_p, ORT_WORKSHARE, OMP_CRITICAL); gimplify_adjust_omp_clauses (pre_p, body, &OMP_CRITICAL_CLAUSES (*expr_p), OMP_CRITICAL); g = gimple_build_omp_critical (body, OMP_CRITICAL_NAME (*expr_p), OMP_CRITICAL_CLAUSES (*expr_p)); break; case OMP_SCAN: gimplify_scan_omp_clauses (&OMP_SCAN_CLAUSES (*expr_p), pre_p, ORT_WORKSHARE, OMP_SCAN); gimplify_adjust_omp_clauses (pre_p, body, &OMP_SCAN_CLAUSES (*expr_p), OMP_SCAN); g = gimple_build_omp_scan (body, OMP_SCAN_CLAUSES (*expr_p)); break; default: gcc_unreachable (); } gimplify_seq_add_stmt (pre_p, g); ret = GS_ALL_DONE; break; } case OMP_TASKGROUP: { gimple_seq body = NULL; tree *pclauses = &OMP_TASKGROUP_CLAUSES (*expr_p); bool saved_in_omp_construct = in_omp_construct; gimplify_scan_omp_clauses (pclauses, pre_p, ORT_TASKGROUP, OMP_TASKGROUP); gimplify_adjust_omp_clauses (pre_p, NULL, pclauses, OMP_TASKGROUP); in_omp_construct = true; gimplify_and_add (OMP_BODY (*expr_p), &body); in_omp_construct = saved_in_omp_construct; gimple_seq cleanup = NULL; tree fn = builtin_decl_explicit (BUILT_IN_GOMP_TASKGROUP_END); gimple *g = gimple_build_call (fn, 0); gimple_seq_add_stmt (&cleanup, g); g = gimple_build_try (body, cleanup, GIMPLE_TRY_FINALLY); body = NULL; gimple_seq_add_stmt (&body, g); g = gimple_build_omp_taskgroup (body, *pclauses); gimplify_seq_add_stmt (pre_p, g); ret = GS_ALL_DONE; break; } case OMP_ATOMIC: case OMP_ATOMIC_READ: case OMP_ATOMIC_CAPTURE_OLD: case OMP_ATOMIC_CAPTURE_NEW: ret = gimplify_omp_atomic (expr_p, pre_p); break; case TRANSACTION_EXPR: ret = gimplify_transaction (expr_p, pre_p); break; case TRUTH_AND_EXPR: case TRUTH_OR_EXPR: case TRUTH_XOR_EXPR: { tree orig_type = TREE_TYPE (*expr_p); tree new_type, xop0, xop1; *expr_p = gimple_boolify (*expr_p); new_type = TREE_TYPE (*expr_p); if (!useless_type_conversion_p (orig_type, new_type)) { *expr_p = fold_convert_loc (input_location, orig_type, *expr_p); ret = GS_OK; break; } /* Boolified binary truth expressions are semantically equivalent to bitwise binary expressions. Canonicalize them to the bitwise variant. */ switch (TREE_CODE (*expr_p)) { case TRUTH_AND_EXPR: TREE_SET_CODE (*expr_p, BIT_AND_EXPR); break; case TRUTH_OR_EXPR: TREE_SET_CODE (*expr_p, BIT_IOR_EXPR); break; case TRUTH_XOR_EXPR: TREE_SET_CODE (*expr_p, BIT_XOR_EXPR); break; default: break; } /* Now make sure that operands have compatible type to expression's new_type. */ xop0 = TREE_OPERAND (*expr_p, 0); xop1 = TREE_OPERAND (*expr_p, 1); if (!useless_type_conversion_p (new_type, TREE_TYPE (xop0))) TREE_OPERAND (*expr_p, 0) = fold_convert_loc (input_location, new_type, xop0); if (!useless_type_conversion_p (new_type, TREE_TYPE (xop1))) TREE_OPERAND (*expr_p, 1) = fold_convert_loc (input_location, new_type, xop1); /* Continue classified as tcc_binary. */ goto expr_2; } case VEC_COND_EXPR: goto expr_3; case VEC_PERM_EXPR: /* Classified as tcc_expression. */ goto expr_3; case BIT_INSERT_EXPR: /* Argument 3 is a constant. */ goto expr_2; case POINTER_PLUS_EXPR: { enum gimplify_status r0, r1; r0 = gimplify_expr (&TREE_OPERAND (*expr_p, 0), pre_p, post_p, is_gimple_val, fb_rvalue); r1 = gimplify_expr (&TREE_OPERAND (*expr_p, 1), pre_p, post_p, is_gimple_val, fb_rvalue); recalculate_side_effects (*expr_p); ret = MIN (r0, r1); break; } default: switch (TREE_CODE_CLASS (TREE_CODE (*expr_p))) { case tcc_comparison: /* Handle comparison of objects of non scalar mode aggregates with a call to memcmp. It would be nice to only have to do this for variable-sized objects, but then we'd have to allow the same nest of reference nodes we allow for MODIFY_EXPR and that's too complex. Compare scalar mode aggregates as scalar mode values. Using memcmp for them would be very inefficient at best, and is plain wrong if bitfields are involved. */ if (error_operand_p (TREE_OPERAND (*expr_p, 1))) ret = GS_ERROR; else { tree type = TREE_TYPE (TREE_OPERAND (*expr_p, 1)); /* Vector comparisons need no boolification. */ if (TREE_CODE (type) == VECTOR_TYPE) goto expr_2; else if (!AGGREGATE_TYPE_P (type)) { tree org_type = TREE_TYPE (*expr_p); *expr_p = gimple_boolify (*expr_p); if (!useless_type_conversion_p (org_type, TREE_TYPE (*expr_p))) { *expr_p = fold_convert_loc (input_location, org_type, *expr_p); ret = GS_OK; } else goto expr_2; } else if (TYPE_MODE (type) != BLKmode) ret = gimplify_scalar_mode_aggregate_compare (expr_p); else ret = gimplify_variable_sized_compare (expr_p); } break; /* If *EXPR_P does not need to be special-cased, handle it according to its class. */ case tcc_unary: ret = gimplify_expr (&TREE_OPERAND (*expr_p, 0), pre_p, post_p, is_gimple_val, fb_rvalue); break; case tcc_binary: expr_2: { enum gimplify_status r0, r1; r0 = gimplify_expr (&TREE_OPERAND (*expr_p, 0), pre_p, post_p, is_gimple_val, fb_rvalue); r1 = gimplify_expr (&TREE_OPERAND (*expr_p, 1), pre_p, post_p, is_gimple_val, fb_rvalue); ret = MIN (r0, r1); break; } expr_3: { enum gimplify_status r0, r1, r2; r0 = gimplify_expr (&TREE_OPERAND (*expr_p, 0), pre_p, post_p, is_gimple_val, fb_rvalue); r1 = gimplify_expr (&TREE_OPERAND (*expr_p, 1), pre_p, post_p, is_gimple_val, fb_rvalue); r2 = gimplify_expr (&TREE_OPERAND (*expr_p, 2), pre_p, post_p, is_gimple_val, fb_rvalue); ret = MIN (MIN (r0, r1), r2); break; } case tcc_declaration: case tcc_constant: ret = GS_ALL_DONE; goto dont_recalculate; default: gcc_unreachable (); } recalculate_side_effects (*expr_p); dont_recalculate: break; } gcc_assert (*expr_p || ret != GS_OK); } while (ret == GS_OK); /* If we encountered an error_mark somewhere nested inside, either stub out the statement or propagate the error back out. */ if (ret == GS_ERROR) { if (is_statement) *expr_p = NULL; goto out; } /* This was only valid as a return value from the langhook, which we handled. Make sure it doesn't escape from any other context. */ gcc_assert (ret != GS_UNHANDLED); if (fallback == fb_none && *expr_p && !is_gimple_stmt (*expr_p)) { /* We aren't looking for a value, and we don't have a valid statement. If it doesn't have side-effects, throw it away. We can also get here with code such as "*&&L;", where L is a LABEL_DECL that is marked as FORCED_LABEL. */ if (TREE_CODE (*expr_p) == LABEL_DECL || !TREE_SIDE_EFFECTS (*expr_p)) *expr_p = NULL; else if (!TREE_THIS_VOLATILE (*expr_p)) { /* This is probably a _REF that contains something nested that has side effects. Recurse through the operands to find it. */ enum tree_code code = TREE_CODE (*expr_p); switch (code) { case COMPONENT_REF: case REALPART_EXPR: case IMAGPART_EXPR: case VIEW_CONVERT_EXPR: gimplify_expr (&TREE_OPERAND (*expr_p, 0), pre_p, post_p, gimple_test_f, fallback); break; case ARRAY_REF: case ARRAY_RANGE_REF: gimplify_expr (&TREE_OPERAND (*expr_p, 0), pre_p, post_p, gimple_test_f, fallback); gimplify_expr (&TREE_OPERAND (*expr_p, 1), pre_p, post_p, gimple_test_f, fallback); break; default: /* Anything else with side-effects must be converted to a valid statement before we get here. */ gcc_unreachable (); } *expr_p = NULL; } else if (COMPLETE_TYPE_P (TREE_TYPE (*expr_p)) && TYPE_MODE (TREE_TYPE (*expr_p)) != BLKmode && !is_empty_type (TREE_TYPE (*expr_p))) { /* Historically, the compiler has treated a bare reference to a non-BLKmode volatile lvalue as forcing a load. */ tree type = TYPE_MAIN_VARIANT (TREE_TYPE (*expr_p)); /* Normally, we do not want to create a temporary for a TREE_ADDRESSABLE type because such a type should not be copied by bitwise-assignment. However, we make an exception here, as all we are doing here is ensuring that we read the bytes that make up the type. We use create_tmp_var_raw because create_tmp_var will abort when given a TREE_ADDRESSABLE type. */ tree tmp = create_tmp_var_raw (type, "vol"); gimple_add_tmp_var (tmp); gimplify_assign (tmp, *expr_p, pre_p); *expr_p = NULL; } else /* We can't do anything useful with a volatile reference to an incomplete type, so just throw it away. Likewise for a BLKmode type, since any implicit inner load should already have been turned into an explicit one by the gimplification process. */ *expr_p = NULL; } /* If we are gimplifying at the statement level, we're done. Tack everything together and return. */ if (fallback == fb_none || is_statement) { /* Since *EXPR_P has been converted into a GIMPLE tuple, clear it out for GC to reclaim it. */ *expr_p = NULL_TREE; if (!gimple_seq_empty_p (internal_pre) || !gimple_seq_empty_p (internal_post)) { gimplify_seq_add_seq (&internal_pre, internal_post); gimplify_seq_add_seq (pre_p, internal_pre); } /* The result of gimplifying *EXPR_P is going to be the last few statements in *PRE_P and *POST_P. Add location information to all the statements that were added by the gimplification helpers. */ if (!gimple_seq_empty_p (*pre_p)) annotate_all_with_location_after (*pre_p, pre_last_gsi, input_location); if (!gimple_seq_empty_p (*post_p)) annotate_all_with_location_after (*post_p, post_last_gsi, input_location); goto out; } #ifdef ENABLE_GIMPLE_CHECKING if (*expr_p) { enum tree_code code = TREE_CODE (*expr_p); /* These expressions should already be in gimple IR form. */ gcc_assert (code != MODIFY_EXPR && code != ASM_EXPR && code != BIND_EXPR && code != CATCH_EXPR && (code != COND_EXPR || gimplify_ctxp->allow_rhs_cond_expr) && code != EH_FILTER_EXPR && code != GOTO_EXPR && code != LABEL_EXPR && code != LOOP_EXPR && code != SWITCH_EXPR && code != TRY_FINALLY_EXPR && code != EH_ELSE_EXPR && code != OACC_PARALLEL && code != OACC_KERNELS && code != OACC_SERIAL && code != OACC_DATA && code != OACC_HOST_DATA && code != OACC_DECLARE && code != OACC_UPDATE && code != OACC_ENTER_DATA && code != OACC_EXIT_DATA && code != OACC_CACHE && code != OMP_CRITICAL && code != OMP_FOR && code != OACC_LOOP && code != OMP_MASTER && code != OMP_MASKED && code != OMP_TASKGROUP && code != OMP_ORDERED && code != OMP_PARALLEL && code != OMP_SCAN && code != OMP_SECTIONS && code != OMP_SECTION && code != OMP_SINGLE && code != OMP_SCOPE); } #endif /* Otherwise we're gimplifying a subexpression, so the resulting value is interesting. If it's a valid operand that matches GIMPLE_TEST_F, we're done. Unless we are handling some post-effects internally; if that's the case, we need to copy into a temporary before adding the post-effects to POST_P. */ if (gimple_seq_empty_p (internal_post) && (*gimple_test_f) (*expr_p)) goto out; /* Otherwise, we need to create a new temporary for the gimplified expression. */ /* We can't return an lvalue if we have an internal postqueue. The object the lvalue refers to would (probably) be modified by the postqueue; we need to copy the value out first, which means an rvalue. */ if ((fallback & fb_lvalue) && gimple_seq_empty_p (internal_post) && is_gimple_addressable (*expr_p)) { /* An lvalue will do. Take the address of the expression, store it in a temporary, and replace the expression with an INDIRECT_REF of that temporary. */ tree ref_alias_type = reference_alias_ptr_type (*expr_p); unsigned int ref_align = get_object_alignment (*expr_p); tree ref_type = TREE_TYPE (*expr_p); tmp = build_fold_addr_expr_loc (input_location, *expr_p); gimplify_expr (&tmp, pre_p, post_p, is_gimple_reg, fb_rvalue); if (TYPE_ALIGN (ref_type) != ref_align) ref_type = build_aligned_type (ref_type, ref_align); *expr_p = build2 (MEM_REF, ref_type, tmp, build_zero_cst (ref_alias_type)); } else if ((fallback & fb_rvalue) && is_gimple_reg_rhs_or_call (*expr_p)) { /* An rvalue will do. Assign the gimplified expression into a new temporary TMP and replace the original expression with TMP. First, make sure that the expression has a type so that it can be assigned into a temporary. */ gcc_assert (!VOID_TYPE_P (TREE_TYPE (*expr_p))); *expr_p = get_formal_tmp_var (*expr_p, pre_p); } else { #ifdef ENABLE_GIMPLE_CHECKING if (!(fallback & fb_mayfail)) { fprintf (stderr, "gimplification failed:\n"); print_generic_expr (stderr, *expr_p); debug_tree (*expr_p); internal_error ("gimplification failed"); } #endif gcc_assert (fallback & fb_mayfail); /* If this is an asm statement, and the user asked for the impossible, don't die. Fail and let gimplify_asm_expr issue an error. */ ret = GS_ERROR; goto out; } /* Make sure the temporary matches our predicate. */ gcc_assert ((*gimple_test_f) (*expr_p)); if (!gimple_seq_empty_p (internal_post)) { annotate_all_with_location (internal_post, input_location); gimplify_seq_add_seq (pre_p, internal_post); } out: input_location = saved_location; return ret; } /* Like gimplify_expr but make sure the gimplified result is not itself a SSA name (but a decl if it were). Temporaries required by evaluating *EXPR_P may be still SSA names. */ static enum gimplify_status gimplify_expr (tree *expr_p, gimple_seq *pre_p, gimple_seq *post_p, bool (*gimple_test_f) (tree), fallback_t fallback, bool allow_ssa) { enum gimplify_status ret = gimplify_expr (expr_p, pre_p, post_p, gimple_test_f, fallback); if (! allow_ssa && TREE_CODE (*expr_p) == SSA_NAME) *expr_p = get_initialized_tmp_var (*expr_p, pre_p, NULL, false); return ret; } /* Look through TYPE for variable-sized objects and gimplify each such size that we find. Add to LIST_P any statements generated. */ void gimplify_type_sizes (tree type, gimple_seq *list_p) { if (type == NULL || type == error_mark_node) return; const bool ignored_p = TYPE_NAME (type) && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL && DECL_IGNORED_P (TYPE_NAME (type)); tree t; /* We first do the main variant, then copy into any other variants. */ type = TYPE_MAIN_VARIANT (type); /* Avoid infinite recursion. */ if (TYPE_SIZES_GIMPLIFIED (type)) return; TYPE_SIZES_GIMPLIFIED (type) = 1; switch (TREE_CODE (type)) { case INTEGER_TYPE: case ENUMERAL_TYPE: case BOOLEAN_TYPE: case REAL_TYPE: case FIXED_POINT_TYPE: gimplify_one_sizepos (&TYPE_MIN_VALUE (type), list_p); gimplify_one_sizepos (&TYPE_MAX_VALUE (type), list_p); for (t = TYPE_NEXT_VARIANT (type); t; t = TYPE_NEXT_VARIANT (t)) { TYPE_MIN_VALUE (t) = TYPE_MIN_VALUE (type); TYPE_MAX_VALUE (t) = TYPE_MAX_VALUE (type); } break; case ARRAY_TYPE: /* These types may not have declarations, so handle them here. */ gimplify_type_sizes (TREE_TYPE (type), list_p); gimplify_type_sizes (TYPE_DOMAIN (type), list_p); /* Ensure VLA bounds aren't removed, for -O0 they should be variables with assigned stack slots, for -O1+ -g they should be tracked by VTA. */ if (!ignored_p && TYPE_DOMAIN (type) && INTEGRAL_TYPE_P (TYPE_DOMAIN (type))) { t = TYPE_MIN_VALUE (TYPE_DOMAIN (type)); if (t && VAR_P (t) && DECL_ARTIFICIAL (t)) DECL_IGNORED_P (t) = 0; t = TYPE_MAX_VALUE (TYPE_DOMAIN (type)); if (t && VAR_P (t) && DECL_ARTIFICIAL (t)) DECL_IGNORED_P (t) = 0; } break; case RECORD_TYPE: case UNION_TYPE: case QUAL_UNION_TYPE: for (tree field = TYPE_FIELDS (type); field; field = DECL_CHAIN (field)) if (TREE_CODE (field) == FIELD_DECL) { gimplify_one_sizepos (&DECL_FIELD_OFFSET (field), list_p); /* Likewise, ensure variable offsets aren't removed. */ if (!ignored_p && (t = DECL_FIELD_OFFSET (field)) && VAR_P (t) && DECL_ARTIFICIAL (t)) DECL_IGNORED_P (t) = 0; gimplify_one_sizepos (&DECL_SIZE (field), list_p); gimplify_one_sizepos (&DECL_SIZE_UNIT (field), list_p); gimplify_type_sizes (TREE_TYPE (field), list_p); } break; case POINTER_TYPE: case REFERENCE_TYPE: /* We used to recurse on the pointed-to type here, which turned out to be incorrect because its definition might refer to variables not yet initialized at this point if a forward declaration is involved. It was actually useful for anonymous pointed-to types to ensure that the sizes evaluation dominates every possible later use of the values. Restricting to such types here would be safe since there is no possible forward declaration around, but would introduce an undesirable middle-end semantic to anonymity. We then defer to front-ends the responsibility of ensuring that the sizes are evaluated both early and late enough, e.g. by attaching artificial type declarations to the tree. */ break; default: break; } gimplify_one_sizepos (&TYPE_SIZE (type), list_p); gimplify_one_sizepos (&TYPE_SIZE_UNIT (type), list_p); for (t = TYPE_NEXT_VARIANT (type); t; t = TYPE_NEXT_VARIANT (t)) { TYPE_SIZE (t) = TYPE_SIZE (type); TYPE_SIZE_UNIT (t) = TYPE_SIZE_UNIT (type); TYPE_SIZES_GIMPLIFIED (t) = 1; } } /* A subroutine of gimplify_type_sizes to make sure that *EXPR_P, a size or position, has had all of its SAVE_EXPRs evaluated. We add any required statements to *STMT_P. */ void gimplify_one_sizepos (tree *expr_p, gimple_seq *stmt_p) { tree expr = *expr_p; /* We don't do anything if the value isn't there, is constant, or contains A PLACEHOLDER_EXPR. We also don't want to do anything if it's already a VAR_DECL. If it's a VAR_DECL from another function, the gimplifier will want to replace it with a new variable, but that will cause problems if this type is from outside the function. It's OK to have that here. */ if (expr == NULL_TREE || is_gimple_constant (expr) || TREE_CODE (expr) == VAR_DECL || CONTAINS_PLACEHOLDER_P (expr)) return; *expr_p = unshare_expr (expr); /* SSA names in decl/type fields are a bad idea - they'll get reclaimed if the def vanishes. */ gimplify_expr (expr_p, stmt_p, NULL, is_gimple_val, fb_rvalue, false); /* If expr wasn't already is_gimple_sizepos or is_gimple_constant from the FE, ensure that it is a VAR_DECL, otherwise we might handle some decls as gimplify_vla_decl even when they would have all sizes INTEGER_CSTs. */ if (is_gimple_constant (*expr_p)) *expr_p = get_initialized_tmp_var (*expr_p, stmt_p, NULL, false); } /* Gimplify the body of statements of FNDECL and return a GIMPLE_BIND node containing the sequence of corresponding GIMPLE statements. If DO_PARMS is true, also gimplify the parameters. */ gbind * gimplify_body (tree fndecl, bool do_parms) { location_t saved_location = input_location; gimple_seq parm_stmts, parm_cleanup = NULL, seq; gimple *outer_stmt; gbind *outer_bind; timevar_push (TV_TREE_GIMPLIFY); init_tree_ssa (cfun); /* Initialize for optimize_insn_for_s{ize,peed}_p possibly called during gimplification. */ default_rtl_profile (); gcc_assert (gimplify_ctxp == NULL); push_gimplify_context (true); if (flag_openacc || flag_openmp) { gcc_assert (gimplify_omp_ctxp == NULL); if (lookup_attribute ("omp declare target", DECL_ATTRIBUTES (fndecl))) gimplify_omp_ctxp = new_omp_context (ORT_IMPLICIT_TARGET); } /* Unshare most shared trees in the body and in that of any nested functions. It would seem we don't have to do this for nested functions because they are supposed to be output and then the outer function gimplified first, but the g++ front end doesn't always do it that way. */ unshare_body (fndecl); unvisit_body (fndecl); /* Make sure input_location isn't set to something weird. */ input_location = DECL_SOURCE_LOCATION (fndecl); /* Resolve callee-copies. This has to be done before processing the body so that DECL_VALUE_EXPR gets processed correctly. */ parm_stmts = do_parms ? gimplify_parameters (&parm_cleanup) : NULL; /* Gimplify the function's body. */ seq = NULL; gimplify_stmt (&DECL_SAVED_TREE (fndecl), &seq); outer_stmt = gimple_seq_first_nondebug_stmt (seq); if (!outer_stmt) { outer_stmt = gimple_build_nop (); gimplify_seq_add_stmt (&seq, outer_stmt); } /* The body must contain exactly one statement, a GIMPLE_BIND. If this is not the case, wrap everything in a GIMPLE_BIND to make it so. */ if (gimple_code (outer_stmt) == GIMPLE_BIND && (gimple_seq_first_nondebug_stmt (seq) == gimple_seq_last_nondebug_stmt (seq))) { outer_bind = as_a (outer_stmt); if (gimple_seq_first_stmt (seq) != outer_stmt || gimple_seq_last_stmt (seq) != outer_stmt) { /* If there are debug stmts before or after outer_stmt, move them inside of outer_bind body. */ gimple_stmt_iterator gsi = gsi_for_stmt (outer_stmt, &seq); gimple_seq second_seq = NULL; if (gimple_seq_first_stmt (seq) != outer_stmt && gimple_seq_last_stmt (seq) != outer_stmt) { second_seq = gsi_split_seq_after (gsi); gsi_remove (&gsi, false); } else if (gimple_seq_first_stmt (seq) != outer_stmt) gsi_remove (&gsi, false); else { gsi_remove (&gsi, false); second_seq = seq; seq = NULL; } gimple_seq_add_seq_without_update (&seq, gimple_bind_body (outer_bind)); gimple_seq_add_seq_without_update (&seq, second_seq); gimple_bind_set_body (outer_bind, seq); } } else outer_bind = gimple_build_bind (NULL_TREE, seq, NULL); DECL_SAVED_TREE (fndecl) = NULL_TREE; /* If we had callee-copies statements, insert them at the beginning of the function and clear DECL_VALUE_EXPR_P on the parameters. */ if (!gimple_seq_empty_p (parm_stmts)) { tree parm; gimplify_seq_add_seq (&parm_stmts, gimple_bind_body (outer_bind)); if (parm_cleanup) { gtry *g = gimple_build_try (parm_stmts, parm_cleanup, GIMPLE_TRY_FINALLY); parm_stmts = NULL; gimple_seq_add_stmt (&parm_stmts, g); } gimple_bind_set_body (outer_bind, parm_stmts); for (parm = DECL_ARGUMENTS (current_function_decl); parm; parm = DECL_CHAIN (parm)) if (DECL_HAS_VALUE_EXPR_P (parm)) { DECL_HAS_VALUE_EXPR_P (parm) = 0; DECL_IGNORED_P (parm) = 0; } } if ((flag_openacc || flag_openmp || flag_openmp_simd) && gimplify_omp_ctxp) { delete_omp_context (gimplify_omp_ctxp); gimplify_omp_ctxp = NULL; } pop_gimplify_context (outer_bind); gcc_assert (gimplify_ctxp == NULL); if (flag_checking && !seen_error ()) verify_gimple_in_seq (gimple_bind_body (outer_bind)); timevar_pop (TV_TREE_GIMPLIFY); input_location = saved_location; return outer_bind; } typedef char *char_p; /* For DEF_VEC_P. */ /* Return whether we should exclude FNDECL from instrumentation. */ static bool flag_instrument_functions_exclude_p (tree fndecl) { vec *v; v = (vec *) flag_instrument_functions_exclude_functions; if (v && v->length () > 0) { const char *name; int i; char *s; name = lang_hooks.decl_printable_name (fndecl, 1); FOR_EACH_VEC_ELT (*v, i, s) if (strstr (name, s) != NULL) return true; } v = (vec *) flag_instrument_functions_exclude_files; if (v && v->length () > 0) { const char *name; int i; char *s; name = DECL_SOURCE_FILE (fndecl); FOR_EACH_VEC_ELT (*v, i, s) if (strstr (name, s) != NULL) return true; } return false; } /* Entry point to the gimplification pass. FNDECL is the FUNCTION_DECL node for the function we want to gimplify. Return the sequence of GIMPLE statements corresponding to the body of FNDECL. */ void gimplify_function_tree (tree fndecl) { gimple_seq seq; gbind *bind; gcc_assert (!gimple_body (fndecl)); if (DECL_STRUCT_FUNCTION (fndecl)) push_cfun (DECL_STRUCT_FUNCTION (fndecl)); else push_struct_function (fndecl); /* Tentatively set PROP_gimple_lva here, and reset it in gimplify_va_arg_expr if necessary. */ cfun->curr_properties |= PROP_gimple_lva; if (asan_sanitize_use_after_scope ()) asan_poisoned_variables = new hash_set (); bind = gimplify_body (fndecl, true); if (asan_poisoned_variables) { delete asan_poisoned_variables; asan_poisoned_variables = NULL; } /* The tree body of the function is no longer needed, replace it with the new GIMPLE body. */ seq = NULL; gimple_seq_add_stmt (&seq, bind); gimple_set_body (fndecl, seq); /* If we're instrumenting function entry/exit, then prepend the call to the entry hook and wrap the whole function in a TRY_FINALLY_EXPR to catch the exit hook. */ /* ??? Add some way to ignore exceptions for this TFE. */ if (flag_instrument_function_entry_exit && !DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (fndecl) /* Do not instrument extern inline functions. */ && !(DECL_DECLARED_INLINE_P (fndecl) && DECL_EXTERNAL (fndecl) && DECL_DISREGARD_INLINE_LIMITS (fndecl)) && !flag_instrument_functions_exclude_p (fndecl)) { tree x; gbind *new_bind; gimple *tf; gimple_seq cleanup = NULL, body = NULL; tree tmp_var, this_fn_addr; gcall *call; /* The instrumentation hooks aren't going to call the instrumented function and the address they receive is expected to be matchable against symbol addresses. Make sure we don't create a trampoline, in case the current function is nested. */ this_fn_addr = build_fold_addr_expr (current_function_decl); TREE_NO_TRAMPOLINE (this_fn_addr) = 1; x = builtin_decl_implicit (BUILT_IN_RETURN_ADDRESS); call = gimple_build_call (x, 1, integer_zero_node); tmp_var = create_tmp_var (ptr_type_node, "return_addr"); gimple_call_set_lhs (call, tmp_var); gimplify_seq_add_stmt (&cleanup, call); x = builtin_decl_implicit (BUILT_IN_PROFILE_FUNC_EXIT); call = gimple_build_call (x, 2, this_fn_addr, tmp_var); gimplify_seq_add_stmt (&cleanup, call); tf = gimple_build_try (seq, cleanup, GIMPLE_TRY_FINALLY); x = builtin_decl_implicit (BUILT_IN_RETURN_ADDRESS); call = gimple_build_call (x, 1, integer_zero_node); tmp_var = create_tmp_var (ptr_type_node, "return_addr"); gimple_call_set_lhs (call, tmp_var); gimplify_seq_add_stmt (&body, call); x = builtin_decl_implicit (BUILT_IN_PROFILE_FUNC_ENTER); call = gimple_build_call (x, 2, this_fn_addr, tmp_var); gimplify_seq_add_stmt (&body, call); gimplify_seq_add_stmt (&body, tf); new_bind = gimple_build_bind (NULL, body, NULL); /* Replace the current function body with the body wrapped in the try/finally TF. */ seq = NULL; gimple_seq_add_stmt (&seq, new_bind); gimple_set_body (fndecl, seq); bind = new_bind; } if (sanitize_flags_p (SANITIZE_THREAD) && param_tsan_instrument_func_entry_exit) { gcall *call = gimple_build_call_internal (IFN_TSAN_FUNC_EXIT, 0); gimple *tf = gimple_build_try (seq, call, GIMPLE_TRY_FINALLY); gbind *new_bind = gimple_build_bind (NULL, tf, NULL); /* Replace the current function body with the body wrapped in the try/finally TF. */ seq = NULL; gimple_seq_add_stmt (&seq, new_bind); gimple_set_body (fndecl, seq); } DECL_SAVED_TREE (fndecl) = NULL_TREE; cfun->curr_properties |= PROP_gimple_any; pop_cfun (); dump_function (TDI_gimple, fndecl); } /* Return a dummy expression of type TYPE in order to keep going after an error. */ static tree dummy_object (tree type) { tree t = build_int_cst (build_pointer_type (type), 0); return build2 (MEM_REF, type, t, t); } /* Gimplify __builtin_va_arg, aka VA_ARG_EXPR, which is not really a builtin function, but a very special sort of operator. */ enum gimplify_status gimplify_va_arg_expr (tree *expr_p, gimple_seq *pre_p, gimple_seq *post_p ATTRIBUTE_UNUSED) { tree promoted_type, have_va_type; tree valist = TREE_OPERAND (*expr_p, 0); tree type = TREE_TYPE (*expr_p); tree t, tag, aptag; location_t loc = EXPR_LOCATION (*expr_p); /* Verify that valist is of the proper type. */ have_va_type = TREE_TYPE (valist); if (have_va_type == error_mark_node) return GS_ERROR; have_va_type = targetm.canonical_va_list_type (have_va_type); if (have_va_type == NULL_TREE && POINTER_TYPE_P (TREE_TYPE (valist))) /* Handle 'Case 1: Not an array type' from c-common.cc/build_va_arg. */ have_va_type = targetm.canonical_va_list_type (TREE_TYPE (TREE_TYPE (valist))); gcc_assert (have_va_type != NULL_TREE); /* Generate a diagnostic for requesting data of a type that cannot be passed through `...' due to type promotion at the call site. */ if ((promoted_type = lang_hooks.types.type_promotes_to (type)) != type) { static bool gave_help; bool warned; /* Use the expansion point to handle cases such as passing bool (defined in a system header) through `...'. */ location_t xloc = expansion_point_location_if_in_system_header (loc); /* Unfortunately, this is merely undefined, rather than a constraint violation, so we cannot make this an error. If this call is never executed, the program is still strictly conforming. */ auto_diagnostic_group d; warned = warning_at (xloc, 0, "%qT is promoted to %qT when passed through %<...%>", type, promoted_type); if (!gave_help && warned) { gave_help = true; inform (xloc, "(so you should pass %qT not %qT to %)", promoted_type, type); } /* We can, however, treat "undefined" any way we please. Call abort to encourage the user to fix the program. */ if (warned) inform (xloc, "if this code is reached, the program will abort"); /* Before the abort, allow the evaluation of the va_list expression to exit or longjmp. */ gimplify_and_add (valist, pre_p); t = build_call_expr_loc (loc, builtin_decl_implicit (BUILT_IN_TRAP), 0); gimplify_and_add (t, pre_p); /* This is dead code, but go ahead and finish so that the mode of the result comes out right. */ *expr_p = dummy_object (type); return GS_ALL_DONE; } tag = build_int_cst (build_pointer_type (type), 0); aptag = build_int_cst (TREE_TYPE (valist), 0); *expr_p = build_call_expr_internal_loc (loc, IFN_VA_ARG, type, 3, valist, tag, aptag); /* Clear the tentatively set PROP_gimple_lva, to indicate that IFN_VA_ARG needs to be expanded. */ cfun->curr_properties &= ~PROP_gimple_lva; return GS_OK; } /* Build a new GIMPLE_ASSIGN tuple and append it to the end of *SEQ_P. DST/SRC are the destination and source respectively. You can pass ungimplified trees in DST or SRC, in which case they will be converted to a gimple operand if necessary. This function returns the newly created GIMPLE_ASSIGN tuple. */ gimple * gimplify_assign (tree dst, tree src, gimple_seq *seq_p) { tree t = build2 (MODIFY_EXPR, TREE_TYPE (dst), dst, src); gimplify_and_add (t, seq_p); ggc_free (t); return gimple_seq_last_stmt (*seq_p); } inline hashval_t gimplify_hasher::hash (const elt_t *p) { tree t = p->val; return iterative_hash_expr (t, 0); } inline bool gimplify_hasher::equal (const elt_t *p1, const elt_t *p2) { tree t1 = p1->val; tree t2 = p2->val; enum tree_code code = TREE_CODE (t1); if (TREE_CODE (t2) != code || TREE_TYPE (t1) != TREE_TYPE (t2)) return false; if (!operand_equal_p (t1, t2, 0)) return false; /* Only allow them to compare equal if they also hash equal; otherwise results are nondeterminate, and we fail bootstrap comparison. */ gcc_checking_assert (hash (p1) == hash (p2)); return true; }