gcc/gimple-expr.h

   1 /* Header file for gimple decl, type and expressions.
   2    Copyright (C) 2013-2014 Free Software Foundation, Inc.
   3
   4 This file is part of GCC.
   5
   6 GCC is free software; you can redistribute it and/or modify it under
   7 the terms of the GNU General Public License as published by the Free
   8 Software Foundation; either version 3, or (at your option) any later
   9 version.
  10
  11 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  12 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with GCC; see the file COPYING3.  If not see
  18 <http://www.gnu.org/licenses/>.  */
  19
  20 #ifndef GCC_GIMPLE_EXPR_H
  21 #define GCC_GIMPLE_EXPR_H
  22
  23 extern bool useless_type_conversion_p (tree, tree);
  24
  25
  26 extern void gimple_set_body (tree, gimple_seq);
  27 extern gimple_seq gimple_body (tree);
  28 extern bool gimple_has_body_p (tree);
  29 extern const char *gimple_decl_printable_name (tree, int);
  30 extern tree copy_var_decl (tree, tree, tree);
  31 extern bool gimple_can_coalesce_p (tree, tree);
  32 extern tree create_tmp_var_name (const char *);
  33 extern tree create_tmp_var_raw (tree, const char *);
  34 extern tree create_tmp_var (tree, const char *);
  35 extern tree create_tmp_reg (tree, const char *);
  36 extern tree create_tmp_reg_fn (struct function *, tree, const char *);
  37
  38
  39 extern void extract_ops_from_tree_1 (tree, enum tree_code *, tree *, tree *,
  40                                      tree *);
  41 extern void gimple_cond_get_ops_from_tree (tree, enum tree_code *, tree *,
  42                                            tree *);
  43 extern bool is_gimple_lvalue (tree);
  44 extern bool is_gimple_condexpr (tree);
  45 extern bool is_gimple_address (const_tree);
  46 extern bool is_gimple_invariant_address (const_tree);
  47 extern bool is_gimple_ip_invariant_address (const_tree);
  48 extern bool is_gimple_min_invariant (const_tree);
  49 extern bool is_gimple_ip_invariant (const_tree);
  50 extern bool is_gimple_reg (tree);
  51 extern bool is_gimple_val (tree);
  52 extern bool is_gimple_asm_val (tree);
  53 extern bool is_gimple_min_lval (tree);
  54 extern bool is_gimple_call_addr (tree);
  55 extern bool is_gimple_mem_ref_addr (tree);
  56 extern void mark_addressable (tree);
  57 extern bool is_gimple_reg_rhs (tree);
  58
  59 /* Return true if a conversion from either type of TYPE1 and TYPE2
  60    to the other is not required.  Otherwise return false.  */
  61
  62 static inline bool
  63 types_compatible_p (tree type1, tree type2)
  64 {
  65   return (type1 == type2
  66           || (useless_type_conversion_p (type1, type2)
  67               && useless_type_conversion_p (type2, type1)));
  68 }
  69
  70 /* Return true if TYPE is a suitable type for a scalar register variable.  */
  71
  72 static inline bool
  73 is_gimple_reg_type (tree type)
  74 {
  75   return !AGGREGATE_TYPE_P (type);
  76 }
  77
  78 /* Return true if T is a variable.  */
  79
  80 static inline bool
  81 is_gimple_variable (tree t)
  82 {
  83   return (TREE_CODE (t) == VAR_DECL
  84           || TREE_CODE (t) == PARM_DECL
  85           || TREE_CODE (t) == RESULT_DECL
  86           || TREE_CODE (t) == SSA_NAME);
  87 }
  88
  89 /*  Return true if T is a GIMPLE identifier (something with an address).  */
  90
  91 static inline bool
  92 is_gimple_id (tree t)
  93 {
  94   return (is_gimple_variable (t)
  95           || TREE_CODE (t) == FUNCTION_DECL
  96           || TREE_CODE (t) == LABEL_DECL
  97           || TREE_CODE (t) == CONST_DECL
  98           /* Allow string constants, since they are addressable.  */
  99           || TREE_CODE (t) == STRING_CST);
 100 }
 101
 102 /* Return true if OP, an SSA name or a DECL is a virtual operand.  */
 103
 104 static inline bool
 105 virtual_operand_p (tree op)
 106 {
 107   if (TREE_CODE (op) == SSA_NAME)
 108     {
 109       op = SSA_NAME_VAR (op);
 110       if (!op)
 111         return false;
 112     }
 113
 114   if (TREE_CODE (op) == VAR_DECL)
 115     return VAR_DECL_IS_VIRTUAL_OPERAND (op);
 116
 117   return false;
 118 }
 119
 120 /*  Return true if T is something whose address can be taken.  */
 121
 122 static inline bool
 123 is_gimple_addressable (tree t)
 124 {
 125   return (is_gimple_id (t) || handled_component_p (t)
 126           || TREE_CODE (t) == MEM_REF);
 127 }
 128
 129 /* Return true if T is a valid gimple constant.  */
 130
 131 static inline bool
 132 is_gimple_constant (const_tree t)
 133 {
 134   switch (TREE_CODE (t))
 135     {
 136     case INTEGER_CST:
 137     case REAL_CST:
 138     case FIXED_CST:
 139     case STRING_CST:
 140     case COMPLEX_CST:
 141     case VECTOR_CST:
 142       return true;
 143
 144     default:
 145       return false;
 146     }
 147 }
 148
 149 /* A wrapper around extract_ops_from_tree_1, for callers which expect
 150    to see only a maximum of two operands.  */
 151
 152 static inline void
 153 extract_ops_from_tree (tree expr, enum tree_code *code, tree *op0,
 154                        tree *op1)
 155 {
 156   tree op2;
 157   extract_ops_from_tree_1 (expr, code, op0, op1, &op2);
 158   gcc_assert (op2 == NULL_TREE);
 159 }
 160
 161 /* Given a valid GIMPLE_CALL function address return the FUNCTION_DECL
 162    associated with the callee if known.  Otherwise return NULL_TREE.  */
 163
 164 static inline tree
 165 gimple_call_addr_fndecl (const_tree fn)
 166 {
 167   if (fn && TREE_CODE (fn) == ADDR_EXPR)
 168     {
 169       tree fndecl = TREE_OPERAND (fn, 0);
 170       if (TREE_CODE (fndecl) == MEM_REF
 171           && TREE_CODE (TREE_OPERAND (fndecl, 0)) == ADDR_EXPR
 172           && integer_zerop (TREE_OPERAND (fndecl, 1)))
 173         fndecl = TREE_OPERAND (TREE_OPERAND (fndecl, 0), 0);
 174       if (TREE_CODE (fndecl) == FUNCTION_DECL)
 175         return fndecl;
 176     }
 177   return NULL_TREE;
 178 }
 179
 180 #endif /* GCC_GIMPLE_EXPR_H */