1 /* Header file for gimple decl, type and expressions. 2 Copyright (C) 2013-2020 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_condexpr_for_cond (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 flush_mark_addressable_queue (void); 57 extern void mark_addressable (tree); 58 extern bool is_gimple_reg_rhs (tree); 59 60 /* Return true if a conversion from either type of TYPE1 and TYPE2 61 to the other is not required. Otherwise return false. */ 62 63 static inline bool 64 types_compatible_p (tree type1, tree type2) 65 { 66 return (type1 == type2 67 || (useless_type_conversion_p (type1, type2) 68 && useless_type_conversion_p (type2, type1))); 69 } 70 71 /* Return true if TYPE is a suitable type for a scalar register variable. */ 72 73 static inline bool 74 is_gimple_reg_type (tree type) 75 { 76 return !AGGREGATE_TYPE_P (type); 77 } 78 79 /* Return true if T is a variable. */ 80 81 static inline bool 82 is_gimple_variable (tree t) 83 { 84 return (TREE_CODE (t) == VAR_DECL 85 || TREE_CODE (t) == PARM_DECL 86 || TREE_CODE (t) == RESULT_DECL 87 || TREE_CODE (t) == SSA_NAME); 88 } 89 90 /* Return true if T is a GIMPLE identifier (something with an address). */ 91 92 static inline bool 93 is_gimple_id (tree t) 94 { 95 return (is_gimple_variable (t) 96 || TREE_CODE (t) == FUNCTION_DECL 97 || TREE_CODE (t) == LABEL_DECL 98 || TREE_CODE (t) == CONST_DECL 99 /* Allow string constants, since they are addressable. */ 100 || TREE_CODE (t) == STRING_CST); 101 } 102 103 /* Return true if OP, an SSA name or a DECL is a virtual operand. */ 104 105 static inline bool 106 virtual_operand_p (tree op) 107 { 108 if (TREE_CODE (op) == SSA_NAME) 109 return SSA_NAME_IS_VIRTUAL_OPERAND (op); 110 111 if (TREE_CODE (op) == VAR_DECL) 112 return VAR_DECL_IS_VIRTUAL_OPERAND (op); 113 114 return false; 115 } 116 117 /* Return true if T is something whose address can be taken. */ 118 119 static inline bool 120 is_gimple_addressable (tree t) 121 { 122 return (is_gimple_id (t) || handled_component_p (t) 123 || TREE_CODE (t) == TARGET_MEM_REF 124 || TREE_CODE (t) == MEM_REF); 125 } 126 127 /* Return true if T is a valid gimple constant. */ 128 129 static inline bool 130 is_gimple_constant (const_tree t) 131 { 132 switch (TREE_CODE (t)) 133 { 134 case INTEGER_CST: 135 case POLY_INT_CST: 136 case REAL_CST: 137 case FIXED_CST: 138 case COMPLEX_CST: 139 case VECTOR_CST: 140 case STRING_CST: 141 return true; 142 143 default: 144 return false; 145 } 146 } 147 148 /* A wrapper around extract_ops_from_tree with 3 ops, for callers which 149 expect to see only a maximum of two operands. */ 150 151 static inline void 152 extract_ops_from_tree (tree expr, enum tree_code *code, tree *op0, 153 tree *op1) 154 { 155 tree op2; 156 extract_ops_from_tree (expr, code, op0, op1, &op2); 157 gcc_assert (op2 == NULL_TREE); 158 } 159 160 /* Given a valid GIMPLE_CALL function address return the FUNCTION_DECL 161 associated with the callee if known. Otherwise return NULL_TREE. */ 162 163 static inline tree 164 gimple_call_addr_fndecl (const_tree fn) 165 { 166 if (fn && TREE_CODE (fn) == ADDR_EXPR) 167 { 168 tree fndecl = TREE_OPERAND (fn, 0); 169 if (TREE_CODE (fndecl) == MEM_REF 170 && TREE_CODE (TREE_OPERAND (fndecl, 0)) == ADDR_EXPR 171 && integer_zerop (TREE_OPERAND (fndecl, 1))) 172 fndecl = TREE_OPERAND (TREE_OPERAND (fndecl, 0), 0); 173 if (TREE_CODE (fndecl) == FUNCTION_DECL) 174 return fndecl; 175 } 176 return NULL_TREE; 177 } 178 179 #endif /* GCC_GIMPLE_EXPR_H */ 180