1 /* Header file for gimple decl, type and expressions. 2 Copyright (C) 2013-2018 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 tree create_tmp_var_name (const char *); 32 extern tree create_tmp_var_raw (tree, const char * = NULL); 33 extern tree create_tmp_var (tree, const char * = NULL); 34 extern tree create_tmp_reg (tree, const char * = NULL); 35 extern tree create_tmp_reg_fn (struct function *, tree, const char *); 36 37 38 extern void extract_ops_from_tree (tree, enum tree_code *, tree *, tree *, 39 tree *); 40 extern void gimple_cond_get_ops_from_tree (tree, enum tree_code *, tree *, 41 tree *); 42 extern bool is_gimple_lvalue (tree); 43 extern bool is_gimple_condexpr (tree); 44 extern bool is_gimple_address (const_tree); 45 extern bool is_gimple_invariant_address (const_tree); 46 extern bool is_gimple_ip_invariant_address (const_tree); 47 extern bool is_gimple_min_invariant (const_tree); 48 extern bool is_gimple_ip_invariant (const_tree); 49 extern bool is_gimple_reg (tree); 50 extern bool is_gimple_val (tree); 51 extern bool is_gimple_asm_val (tree); 52 extern bool is_gimple_min_lval (tree); 53 extern bool is_gimple_call_addr (tree); 54 extern bool is_gimple_mem_ref_addr (tree); 55 extern void flush_mark_addressable_queue (void); 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 return SSA_NAME_IS_VIRTUAL_OPERAND (op); 109 110 if (TREE_CODE (op) == VAR_DECL) 111 return VAR_DECL_IS_VIRTUAL_OPERAND (op); 112 113 return false; 114 } 115 116 /* Return true if T is something whose address can be taken. */ 117 118 static inline bool 119 is_gimple_addressable (tree t) 120 { 121 return (is_gimple_id (t) || handled_component_p (t) 122 || TREE_CODE (t) == TARGET_MEM_REF 123 || TREE_CODE (t) == MEM_REF); 124 } 125 126 /* Return true if T is a valid gimple constant. */ 127 128 static inline bool 129 is_gimple_constant (const_tree t) 130 { 131 switch (TREE_CODE (t)) 132 { 133 case INTEGER_CST: 134 case POLY_INT_CST: 135 case REAL_CST: 136 case FIXED_CST: 137 case COMPLEX_CST: 138 case VECTOR_CST: 139 case STRING_CST: 140 return true; 141 142 default: 143 return false; 144 } 145 } 146 147 /* A wrapper around extract_ops_from_tree with 3 ops, for callers which 148 expect to see only a maximum of two operands. */ 149 150 static inline void 151 extract_ops_from_tree (tree expr, enum tree_code *code, tree *op0, 152 tree *op1) 153 { 154 tree op2; 155 extract_ops_from_tree (expr, code, op0, op1, &op2); 156 gcc_assert (op2 == NULL_TREE); 157 } 158 159 /* Given a valid GIMPLE_CALL function address return the FUNCTION_DECL 160 associated with the callee if known. Otherwise return NULL_TREE. */ 161 162 static inline tree 163 gimple_call_addr_fndecl (const_tree fn) 164 { 165 if (fn && TREE_CODE (fn) == ADDR_EXPR) 166 { 167 tree fndecl = TREE_OPERAND (fn, 0); 168 if (TREE_CODE (fndecl) == MEM_REF 169 && TREE_CODE (TREE_OPERAND (fndecl, 0)) == ADDR_EXPR 170 && integer_zerop (TREE_OPERAND (fndecl, 1))) 171 fndecl = TREE_OPERAND (TREE_OPERAND (fndecl, 0), 0); 172 if (TREE_CODE (fndecl) == FUNCTION_DECL) 173 return fndecl; 174 } 175 return NULL_TREE; 176 } 177 178 #endif /* GCC_GIMPLE_EXPR_H */ 179