gcc/tree-gimple.h

   1 /* Functions to analyze and validate GIMPLE trees.
   2    Copyright (C) 2002, 2003 Free Software Foundation, Inc.
   3    Contributed by Diego Novillo <dnovillo@redhat.com>
   4
   5 This file is part of GCC.
   6
   7 GCC is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 2, or (at your option)
  10 any later version.
  11
  12 GCC is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with GCC; see the file COPYING.  If not, write to
  19 the Free Software Foundation, 59 Temple Place - Suite 330,
  20 Boston, MA 02111-1307, USA.  */
  21
  22 #ifndef _TREE_SIMPLE_H
  23 #define _TREE_SIMPLE_H 1
  24
  25
  26 #include "tree-iterator.h"
  27
  28 extern tree create_tmp_var_raw (tree, const char *);
  29 extern tree create_tmp_var_name (const char *);
  30 extern tree create_tmp_var (tree, const char *);
  31 extern bool is_gimple_tmp_var (tree);
  32 extern tree get_initialized_tmp_var (tree, tree *, tree *);
  33 extern tree get_formal_tmp_var (tree, tree *);
  34 extern void declare_tmp_vars (tree, tree);
  35
  36 extern tree rationalize_compound_expr (tree);
  37 extern tree right_assocify_expr (tree);
  38 extern void annotate_all_with_locus (tree *, location_t);
  39
  40 /* Validation of GIMPLE expressions.  Note that these predicates only check
  41    the basic form of the expression, they don't recurse to make sure that
  42    underlying nodes are also of the right form.  */
  43
  44 /* Returns true iff T is a valid GIMPLE statement.  */
  45 extern bool is_gimple_stmt (tree);
  46
  47 /* Returns true iff TYPE is a valid type for a scalar register variable.  */
  48 extern bool is_gimple_reg_type (tree);
  49 /* Returns true iff T is a scalar register variable.  */
  50 extern bool is_gimple_reg (tree);
  51 /* Returns true iff T is any sort of variable.  */
  52 extern bool is_gimple_variable (tree);
  53 /* Returns true iff T is a variable or an INDIRECT_REF (of a variable).  */
  54 extern bool is_gimple_min_lval (tree);
  55 /* Returns true iff T is an lvalue other than an INDIRECT_REF.  */
  56 extern bool is_gimple_addr_expr_arg (tree);
  57 /* Returns true iff T is any valid GIMPLE lvalue.  */
  58 extern bool is_gimple_lvalue (tree);
  59
  60 /* Returns true iff T is a GIMPLE restricted function invariant.  */
  61 extern bool is_gimple_min_invariant (tree);
  62 /* Returns true iff T is a GIMPLE rvalue.  */
  63 extern bool is_gimple_val (tree);
  64 /* Returns true iff T is a valid rhs for a MODIFY_EXPR.  */
  65 extern bool is_gimple_rhs (tree);
  66
  67 /* Returns true iff T is a valid if-statement condition.  */
  68 extern bool is_gimple_condexpr (tree);
  69
  70 /* Returns true iff T is a type conversion.  */
  71 extern bool is_gimple_cast (tree);
  72 /* Returns true iff T is a valid CONSTRUCTOR element (either an rvalue or
  73    another CONSTRUCTOR).  */
  74 extern bool is_gimple_constructor_elt (tree);
  75 /* Returns true iff T is a variable that does not need to live in memory.  */
  76 extern bool is_gimple_non_addressable (tree t);
  77
  78 /* Returns true iff T is a valid call address expression.  */
  79 bool is_gimple_call_addr (tree);
  80 /* If T makes a function call, returns the CALL_EXPR operand.  */
  81 extern tree get_call_expr_in (tree t);
  82
  83 extern void recalculate_side_effects (tree);
  84
  85 /* FIXME we should deduce this from the predicate.  */
  86 typedef enum fallback_t {
  87   fb_none = 0,
  88   fb_rvalue = 1,
  89   fb_lvalue = 2,
  90   fb_mayfail = 4,
  91   fb_either= fb_rvalue | fb_lvalue
  92 } fallback_t;
  93
  94 enum gimplify_status {
  95   GS_ERROR      = -2,   /* Something Bad Seen.  */
  96   GS_UNHANDLED  = -1,   /* A langhook result for "I dunno".  */
  97   GS_OK         = 0,    /* We did something, maybe more to do.  */
  98   GS_ALL_DONE   = 1     /* The expression is fully gimplified.  */
  99 };
 100
 101 extern enum gimplify_status gimplify_expr (tree *, tree *, tree *,
 102                                            bool (*) (tree), fallback_t);
 103 extern void gimplify_type_sizes (tree, tree *);
 104 extern void gimplify_one_sizepos (tree *, tree *);
 105 extern void gimplify_stmt (tree *);
 106 extern void gimplify_to_stmt_list (tree *);
 107 extern void gimplify_body (tree *, tree);
 108 extern void push_gimplify_context (void);
 109 extern void pop_gimplify_context (tree);
 110 extern void gimplify_and_add (tree, tree *);
 111
 112 /* Miscellaneous helpers.  */
 113 extern tree get_base_address (tree t);
 114 extern void gimple_add_tmp_var (tree);
 115 extern tree gimple_current_bind_expr (void);
 116 extern void gimple_push_bind_expr (tree);
 117 extern void gimple_pop_bind_expr (void);
 118 extern void unshare_all_trees (tree);
 119 extern tree voidify_wrapper_expr (tree, tree);
 120 extern tree gimple_build_eh_filter (tree, tree, tree);
 121 extern tree build_and_jump (tree *);
 122 extern tree alloc_stmt_list (void);
 123 extern void free_stmt_list (tree);
 124 extern tree force_labels_r (tree *, int *, void *);
 125 extern enum gimplify_status gimplify_va_arg_expr (tree *, tree *, tree *);
 126
 127 /* In tree-nested.c.  */
 128 extern void lower_nested_functions (tree);
 129
 130 #endif /* _TREE_SIMPLE_H  */