1 /* Header file for gimple decl, type and expressions. 2 Copyright (C) 2013-2015 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 * = NULL); 34 extern tree create_tmp_var (tree, const char * = NULL); 35 extern tree create_tmp_reg (tree, const char * = NULL); 36 extern tree create_tmp_reg_fn (struct function *, tree, const char *); 37 38 39 extern void extract_ops_from_tree (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 with 3 ops, for callers which 150 expect 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 (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 */ 181