28f6839be1
PR c/79413 * gimplify.h (is_gimple_sizepos): Only test for INTEGER_CST constants, not arbitrary TREE_CONSTANT. * gcc.c-torture/compile/pr79413.c: New test. From-SVN: r245304
108 lines
4.1 KiB
C
108 lines
4.1 KiB
C
/* Header file for gimplification.
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Copyright (C) 2013-2017 Free Software Foundation, Inc.
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free
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Software Foundation; either version 3, or (at your option) any later
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version.
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GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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You should have received a copy of the GNU General Public License
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along with GCC; see the file COPYING3. If not see
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<http://www.gnu.org/licenses/>. */
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#ifndef GCC_GIMPLIFY_H
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#define GCC_GIMPLIFY_H
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/* Validation of GIMPLE expressions. Note that these predicates only check
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the basic form of the expression, they don't recurse to make sure that
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underlying nodes are also of the right form. */
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typedef bool (*gimple_predicate)(tree);
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/* FIXME we should deduce this from the predicate. */
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enum fallback {
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fb_none = 0, /* Do not generate a temporary. */
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fb_rvalue = 1, /* Generate an rvalue to hold the result of a
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gimplified expression. */
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fb_lvalue = 2, /* Generate an lvalue to hold the result of a
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gimplified expression. */
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fb_mayfail = 4, /* Gimplification may fail. Error issued
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afterwards. */
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fb_either= fb_rvalue | fb_lvalue
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};
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typedef int fallback_t;
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enum gimplify_status {
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GS_ERROR = -2, /* Something Bad Seen. */
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GS_UNHANDLED = -1, /* A langhook result for "I dunno". */
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GS_OK = 0, /* We did something, maybe more to do. */
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GS_ALL_DONE = 1 /* The expression is fully gimplified. */
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};
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extern void free_gimplify_stack (void);
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extern void push_gimplify_context (bool in_ssa = false,
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bool rhs_cond_ok = false);
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extern void pop_gimplify_context (gimple *);
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extern gbind *gimple_current_bind_expr (void);
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extern vec<gbind *> gimple_bind_expr_stack (void);
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extern void gimplify_and_add (tree, gimple_seq *);
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extern tree get_formal_tmp_var (tree, gimple_seq *);
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extern tree get_initialized_tmp_var (tree, gimple_seq *, gimple_seq *,
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bool = true);
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extern void declare_vars (tree, gimple *, bool);
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extern void gimple_add_tmp_var (tree);
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extern void gimple_add_tmp_var_fn (struct function *, tree);
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extern tree unshare_expr (tree);
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extern tree unshare_expr_without_location (tree);
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extern tree voidify_wrapper_expr (tree, tree);
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extern tree build_and_jump (tree *);
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extern enum gimplify_status gimplify_self_mod_expr (tree *, gimple_seq *,
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gimple_seq *, bool, tree);
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extern tree gimple_boolify (tree);
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extern gimple_predicate rhs_predicate_for (tree);
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extern bool gimplify_stmt (tree *, gimple_seq *);
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extern void omp_firstprivatize_variable (struct gimplify_omp_ctx *, tree);
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extern enum gimplify_status gimplify_expr (tree *, gimple_seq *, gimple_seq *,
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bool (*) (tree), fallback_t);
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extern void gimplify_type_sizes (tree, gimple_seq *);
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extern void gimplify_one_sizepos (tree *, gimple_seq *);
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extern gbind *gimplify_body (tree, bool);
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extern enum gimplify_status gimplify_arg (tree *, gimple_seq *, location_t,
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bool = true);
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extern void gimplify_function_tree (tree);
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extern enum gimplify_status gimplify_va_arg_expr (tree *, gimple_seq *,
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gimple_seq *);
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gimple *gimplify_assign (tree, tree, gimple_seq *);
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/* Return true if gimplify_one_sizepos doesn't need to gimplify
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expr (when in TYPE_SIZE{,_UNIT} and similar type/decl size/bitsize
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fields). */
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static inline bool
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is_gimple_sizepos (tree expr)
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{
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/* gimplify_one_sizepos doesn't need to do anything if the value isn't there,
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is constant, or contains A PLACEHOLDER_EXPR. We also don't want to do
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anything if it's already a VAR_DECL. If it's a VAR_DECL from another
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function, the gimplifier will want to replace it with a new variable,
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but that will cause problems if this type is from outside the function.
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It's OK to have that here. */
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return (expr == NULL_TREE
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|| TREE_CODE (expr) == INTEGER_CST
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|| TREE_CODE (expr) == VAR_DECL
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|| CONTAINS_PLACEHOLDER_P (expr));
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}
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#endif /* GCC_GIMPLIFY_H */
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