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207 lines
7.7 KiB
C
207 lines
7.7 KiB
C
/* Functions to analyze and validate GIMPLE trees.
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Copyright (C) 2002, 2003, 2005 Free Software Foundation, Inc.
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Contributed by Diego Novillo <dnovillo@redhat.com>
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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
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GCC is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License 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 COPYING. If not, write to
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the Free Software Foundation, 51 Franklin Street, Fifth Floor,
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Boston, MA 02110-1301, USA. */
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#ifndef _TREE_SIMPLE_H
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#define _TREE_SIMPLE_H 1
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#include "tree-iterator.h"
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extern tree create_tmp_var_raw (tree, const char *);
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extern tree create_tmp_var_name (const char *);
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extern tree create_tmp_var (tree, const char *);
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extern tree get_initialized_tmp_var (tree, tree *, tree *);
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extern tree get_formal_tmp_var (tree, tree *);
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extern void declare_vars (tree, tree, bool);
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extern void annotate_all_with_locus (tree *, location_t);
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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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/* Returns true iff T is a valid GIMPLE statement. */
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extern bool is_gimple_stmt (tree);
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/* Returns true iff TYPE is a valid type for a scalar register variable. */
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extern bool is_gimple_reg_type (tree);
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/* Returns true iff T is a scalar register variable. */
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extern bool is_gimple_reg (tree);
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/* Returns true if T is a GIMPLE temporary variable, false otherwise. */
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extern bool is_gimple_formal_tmp_var (tree);
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/* Returns true if T is a GIMPLE temporary register variable. */
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extern bool is_gimple_formal_tmp_reg (tree);
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/* Returns true iff T is any sort of variable. */
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extern bool is_gimple_variable (tree);
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/* Returns true iff T is any sort of symbol. */
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extern bool is_gimple_id (tree);
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/* Returns true iff T is a variable or an INDIRECT_REF (of a variable). */
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extern bool is_gimple_min_lval (tree);
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/* Returns true iff T is something whose address can be taken. */
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extern bool is_gimple_addressable (tree);
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/* Returns true iff T is any valid GIMPLE lvalue. */
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extern bool is_gimple_lvalue (tree);
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/* Returns true iff T is a GIMPLE restricted function invariant. */
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extern bool is_gimple_min_invariant (tree);
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/* Returns true iff T is a GIMPLE rvalue. */
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extern bool is_gimple_val (tree);
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/* Returns true iff T is a GIMPLE asm statement input. */
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extern bool is_gimple_asm_val (tree);
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/* Returns true iff T is a valid rhs for a MODIFY_EXPR where the LHS is a
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GIMPLE temporary, a renamed user variable, or something else,
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respectively. */
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extern bool is_gimple_formal_tmp_rhs (tree);
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extern bool is_gimple_reg_rhs (tree);
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extern bool is_gimple_mem_rhs (tree);
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/* Returns the appropriate one of the above three predicates for the LHS
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T. */
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extern gimple_predicate rhs_predicate_for (tree);
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/* Returns true iff T is a valid if-statement condition. */
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extern bool is_gimple_condexpr (tree);
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/* Returns true iff T is a type conversion. */
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extern bool is_gimple_cast (tree);
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/* Returns true iff T is a variable that does not need to live in memory. */
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extern bool is_gimple_non_addressable (tree t);
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/* Returns true iff T is a valid call address expression. */
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extern bool is_gimple_call_addr (tree);
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/* If T makes a function call, returns the CALL_EXPR operand. */
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extern tree get_call_expr_in (tree t);
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extern void recalculate_side_effects (tree);
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/* FIXME we should deduce this from the predicate. */
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typedef enum fallback_t {
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fb_none = 0,
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fb_rvalue = 1,
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fb_lvalue = 2,
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fb_mayfail = 4,
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fb_either= fb_rvalue | fb_lvalue
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} 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 enum gimplify_status gimplify_expr (tree *, tree *, tree *,
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bool (*) (tree), fallback_t);
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extern void gimplify_type_sizes (tree, tree *);
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extern void gimplify_one_sizepos (tree *, tree *);
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extern void gimplify_stmt (tree *);
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extern void gimplify_to_stmt_list (tree *);
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extern void gimplify_body (tree *, tree, bool);
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extern void push_gimplify_context (void);
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extern void pop_gimplify_context (tree);
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extern void gimplify_and_add (tree, tree *);
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/* Miscellaneous helpers. */
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extern void gimple_add_tmp_var (tree);
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extern tree gimple_current_bind_expr (void);
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extern tree voidify_wrapper_expr (tree, tree);
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extern tree gimple_build_eh_filter (tree, tree, tree);
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extern tree build_and_jump (tree *);
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extern tree alloc_stmt_list (void);
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extern void free_stmt_list (tree);
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extern tree force_labels_r (tree *, int *, void *);
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extern enum gimplify_status gimplify_va_arg_expr (tree *, tree *, tree *);
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struct gimplify_omp_ctx;
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extern void omp_firstprivatize_variable (struct gimplify_omp_ctx *, tree);
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extern tree gimple_boolify (tree);
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/* In omp-low.c. */
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extern void diagnose_omp_structured_block_errors (tree);
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extern tree omp_reduction_init (tree, tree);
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/* In tree-nested.c. */
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extern void lower_nested_functions (tree);
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extern void insert_field_into_struct (tree, tree);
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/* Convenience routines to walk all statements of a gimple function.
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The difference between these walkers and the generic walk_tree is
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that walk_stmt provides context information to the callback
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routine to know whether it is currently on the LHS or RHS of an
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assignment (IS_LHS) or contexts where only GIMPLE values are
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allowed (VAL_ONLY).
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This is useful in walkers that need to re-write sub-expressions
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inside statements while making sure the result is still in GIMPLE
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form.
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Note that this is useful exclusively before the code is converted
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into SSA form. Once the program is in SSA form, the standard
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operand interface should be used to analyze/modify statements. */
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struct walk_stmt_info
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{
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/* For each statement, we invoke CALLBACK via walk_tree. The passed
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data is a walk_stmt_info structure. */
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walk_tree_fn callback;
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/* Points to the current statement being walked. */
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tree_stmt_iterator tsi;
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/* Additional data that CALLBACK may want to carry through the
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recursion. */
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void *info;
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/* Indicates whether the *TP being examined may be replaced
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with something that matches is_gimple_val (if true) or something
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slightly more complicated (if false). "Something" technically
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means the common subset of is_gimple_lvalue and is_gimple_rhs,
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but we never try to form anything more complicated than that, so
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we don't bother checking.
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Also note that CALLBACK should update this flag while walking the
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sub-expressions of a statement. For instance, when walking the
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statement 'foo (&var)', the flag VAL_ONLY will initially be set
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to true, however, when walking &var, the operand of that
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ADDR_EXPR does not need to be a GIMPLE value. */
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bool val_only;
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/* True if we are currently walking the LHS of an assignment. */
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bool is_lhs;
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/* Optional. Set to true by CALLBACK if it made any changes. */
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bool changed;
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/* True if we're interested in seeing BIND_EXPRs. */
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bool want_bind_expr;
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/* True if we're interested in seeing RETURN_EXPRs. */
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bool want_return_expr;
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/* True if we're interested in location information. */
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bool want_locations;
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};
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void walk_stmts (struct walk_stmt_info *, tree *);
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#endif /* _TREE_SIMPLE_H */
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