1 /* Fold a constant sub-tree into a single node for C-compiler 2 Copyright (C) 1987-2019 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_FOLD_CONST_H 21 #define GCC_FOLD_CONST_H 22 23 /* Non-zero if we are folding constants inside an initializer; zero 24 otherwise. */ 25 extern int folding_initializer; 26 27 /* Convert between trees and native memory representation. */ 28 extern int native_encode_expr (const_tree, unsigned char *, int, int off = -1); 29 extern tree native_interpret_expr (tree, const unsigned char *, int); 30 31 /* Fold constants as much as possible in an expression. 32 Returns the simplified expression. 33 Acts only on the top level of the expression; 34 if the argument itself cannot be simplified, its 35 subexpressions are not changed. */ 36 37 extern tree fold (tree); 38 #define fold_unary(CODE,T1,T2)\ 39 fold_unary_loc (UNKNOWN_LOCATION, CODE, T1, T2) 40 extern tree fold_unary_loc (location_t, enum tree_code, tree, tree); 41 #define fold_unary_ignore_overflow(CODE,T1,T2)\ 42 fold_unary_ignore_overflow_loc (UNKNOWN_LOCATION, CODE, T1, T2) 43 extern tree fold_unary_ignore_overflow_loc (location_t, enum tree_code, tree, tree); 44 #define fold_binary(CODE,T1,T2,T3)\ 45 fold_binary_loc (UNKNOWN_LOCATION, CODE, T1, T2, T3) 46 extern tree fold_binary_loc (location_t, enum tree_code, tree, tree, tree); 47 #define fold_ternary(CODE,T1,T2,T3,T4)\ 48 fold_ternary_loc (UNKNOWN_LOCATION, CODE, T1, T2, T3, T4) 49 extern tree fold_ternary_loc (location_t, enum tree_code, tree, tree, tree, tree); 50 #define fold_build1(c,t1,t2)\ 51 fold_build1_loc (UNKNOWN_LOCATION, c, t1, t2 MEM_STAT_INFO) 52 extern tree fold_build1_loc (location_t, enum tree_code, tree, 53 tree CXX_MEM_STAT_INFO); 54 #define fold_build2(c,t1,t2,t3)\ 55 fold_build2_loc (UNKNOWN_LOCATION, c, t1, t2, t3 MEM_STAT_INFO) 56 extern tree fold_build2_loc (location_t, enum tree_code, tree, tree, 57 tree CXX_MEM_STAT_INFO); 58 #define fold_build3(c,t1,t2,t3,t4)\ 59 fold_build3_loc (UNKNOWN_LOCATION, c, t1, t2, t3, t4 MEM_STAT_INFO) 60 extern tree fold_build3_loc (location_t, enum tree_code, tree, tree, tree, 61 tree CXX_MEM_STAT_INFO); 62 extern tree fold_build1_initializer_loc (location_t, enum tree_code, tree, tree); 63 extern tree fold_build2_initializer_loc (location_t, enum tree_code, tree, tree, tree); 64 #define fold_build_call_array(T1,T2,N,T4)\ 65 fold_build_call_array_loc (UNKNOWN_LOCATION, T1, T2, N, T4) 66 extern tree fold_build_call_array_loc (location_t, tree, tree, int, tree *); 67 #define fold_build_call_array_initializer(T1,T2,N,T4)\ 68 fold_build_call_array_initializer_loc (UNKNOWN_LOCATION, T1, T2, N, T4) 69 extern tree fold_build_call_array_initializer_loc (location_t, tree, tree, int, tree *); 70 extern tree get_array_ctor_element_at_index (tree, offset_int); 71 extern bool fold_convertible_p (const_tree, const_tree); 72 #define fold_convert(T1,T2)\ 73 fold_convert_loc (UNKNOWN_LOCATION, T1, T2) 74 extern tree fold_convert_loc (location_t, tree, tree); 75 extern tree fold_single_bit_test (location_t, enum tree_code, tree, tree, tree); 76 extern tree fold_ignored_result (tree); 77 extern tree fold_abs_const (tree, tree); 78 extern tree fold_indirect_ref_1 (location_t, tree, tree); 79 extern void fold_defer_overflow_warnings (void); 80 extern void fold_undefer_overflow_warnings (bool, const gimple *, int); 81 extern void fold_undefer_and_ignore_overflow_warnings (void); 82 extern bool fold_deferring_overflow_warnings_p (void); 83 extern void fold_overflow_warning (const char*, enum warn_strict_overflow_code); 84 extern enum tree_code fold_div_compare (enum tree_code, tree, tree, 85 tree *, tree *, bool *); 86 extern int operand_equal_p (const_tree, const_tree, unsigned int); 87 extern int multiple_of_p (tree, const_tree, const_tree); 88 #define omit_one_operand(T1,T2,T3)\ 89 omit_one_operand_loc (UNKNOWN_LOCATION, T1, T2, T3) 90 extern tree omit_one_operand_loc (location_t, tree, tree, tree); 91 #define omit_two_operands(T1,T2,T3,T4)\ 92 omit_two_operands_loc (UNKNOWN_LOCATION, T1, T2, T3, T4) 93 extern tree omit_two_operands_loc (location_t, tree, tree, tree, tree); 94 #define invert_truthvalue(T)\ 95 invert_truthvalue_loc (UNKNOWN_LOCATION, T) 96 extern tree invert_truthvalue_loc (location_t, tree); 97 extern tree fold_unary_to_constant (enum tree_code, tree, tree); 98 extern tree fold_binary_to_constant (enum tree_code, tree, tree, tree); 99 extern tree fold_bit_and_mask (tree, tree, enum tree_code, 100 tree, enum tree_code, tree, tree, 101 tree, enum tree_code, tree, tree, tree *); 102 extern tree fold_read_from_constant_string (tree); 103 extern bool wide_int_binop (wide_int &res, enum tree_code, 104 const wide_int &arg1, const wide_int &arg2, 105 signop, wi::overflow_type *); 106 extern tree int_const_binop (enum tree_code, const_tree, const_tree, int = 1); 107 #define build_fold_addr_expr(T)\ 108 build_fold_addr_expr_loc (UNKNOWN_LOCATION, (T)) 109 extern tree build_fold_addr_expr_loc (location_t, tree); 110 #define build_fold_addr_expr_with_type(T,TYPE)\ 111 build_fold_addr_expr_with_type_loc (UNKNOWN_LOCATION, (T), TYPE) 112 extern tree build_fold_addr_expr_with_type_loc (location_t, tree, tree); 113 extern tree fold_build_cleanup_point_expr (tree type, tree expr); 114 #define build_fold_indirect_ref(T)\ 115 build_fold_indirect_ref_loc (UNKNOWN_LOCATION, T) 116 extern tree build_fold_indirect_ref_loc (location_t, tree); 117 #define fold_indirect_ref(T)\ 118 fold_indirect_ref_loc (UNKNOWN_LOCATION, T) 119 extern tree fold_indirect_ref_loc (location_t, tree); 120 extern tree build_simple_mem_ref_loc (location_t, tree); 121 #define build_simple_mem_ref(T)\ 122 build_simple_mem_ref_loc (UNKNOWN_LOCATION, T) 123 extern poly_offset_int mem_ref_offset (const_tree); 124 extern tree build_invariant_address (tree, tree, poly_int64); 125 extern tree constant_boolean_node (bool, tree); 126 extern tree div_if_zero_remainder (const_tree, const_tree); 127 128 extern bool tree_swap_operands_p (const_tree, const_tree); 129 extern enum tree_code swap_tree_comparison (enum tree_code); 130 131 extern bool ptr_difference_const (tree, tree, poly_int64_pod *); 132 extern enum tree_code invert_tree_comparison (enum tree_code, bool); 133 extern bool inverse_conditions_p (const_tree, const_tree); 134 135 extern bool tree_unary_nonzero_warnv_p (enum tree_code, tree, tree, bool *); 136 extern bool tree_binary_nonzero_warnv_p (enum tree_code, tree, tree, tree op1, 137 bool *); 138 extern bool tree_single_nonzero_warnv_p (tree, bool *); 139 extern bool tree_unary_nonnegative_warnv_p (enum tree_code, tree, tree, 140 bool *, int); 141 extern bool tree_binary_nonnegative_warnv_p (enum tree_code, tree, tree, tree, 142 bool *, int); 143 extern bool tree_single_nonnegative_warnv_p (tree, bool *, int); 144 extern bool tree_call_nonnegative_warnv_p (tree, combined_fn, tree, tree, 145 bool *, int); 146 147 extern bool integer_valued_real_unary_p (tree_code, tree, int); 148 extern bool integer_valued_real_binary_p (tree_code, tree, tree, int); 149 extern bool integer_valued_real_call_p (combined_fn, tree, tree, int); 150 extern bool integer_valued_real_single_p (tree, int); 151 extern bool integer_valued_real_p (tree, int = 0); 152 153 extern bool fold_real_zero_addition_p (const_tree, const_tree, int); 154 extern tree combine_comparisons (location_t, enum tree_code, enum tree_code, 155 enum tree_code, tree, tree, tree); 156 extern void debug_fold_checksum (const_tree); 157 extern bool may_negate_without_overflow_p (const_tree); 158 #define round_up(T,N) round_up_loc (UNKNOWN_LOCATION, T, N) 159 extern tree round_up_loc (location_t, tree, unsigned int); 160 #define round_down(T,N) round_down_loc (UNKNOWN_LOCATION, T, N) 161 extern tree round_down_loc (location_t, tree, int); 162 extern tree size_int_kind (poly_int64, enum size_type_kind); 163 #define size_binop(CODE,T1,T2)\ 164 size_binop_loc (UNKNOWN_LOCATION, CODE, T1, T2) 165 extern tree size_binop_loc (location_t, enum tree_code, tree, tree); 166 #define size_diffop(T1,T2)\ 167 size_diffop_loc (UNKNOWN_LOCATION, T1, T2) 168 extern tree size_diffop_loc (location_t, tree, tree); 169 170 /* Return an expr equal to X but certainly not valid as an lvalue. */ 171 #define non_lvalue(T) non_lvalue_loc (UNKNOWN_LOCATION, T) 172 extern tree non_lvalue_loc (location_t, tree); 173 174 extern bool tree_expr_nonzero_p (tree); 175 extern bool tree_expr_nonnegative_p (tree); 176 extern bool tree_expr_nonnegative_warnv_p (tree, bool *, int = 0); 177 extern tree make_range (tree, int *, tree *, tree *, bool *); 178 extern tree make_range_step (location_t, enum tree_code, tree, tree, tree, 179 tree *, tree *, int *, bool *); 180 extern tree range_check_type (tree); 181 extern tree build_range_check (location_t, tree, tree, int, tree, tree); 182 extern bool merge_ranges (int *, tree *, tree *, int, tree, tree, int, 183 tree, tree); 184 extern tree sign_bit_p (tree, const_tree); 185 extern tree exact_inverse (tree, tree); 186 extern bool expr_not_equal_to (tree t, const wide_int &); 187 extern tree const_unop (enum tree_code, tree, tree); 188 extern tree const_binop (enum tree_code, tree, tree, tree); 189 extern bool negate_mathfn_p (combined_fn); 190 extern const char *c_getstr (tree, unsigned HOST_WIDE_INT * = NULL); 191 extern wide_int tree_nonzero_bits (const_tree); 192 193 /* Return OFF converted to a pointer offset type suitable as offset for 194 POINTER_PLUS_EXPR. Use location LOC for this conversion. */ 195 extern tree convert_to_ptrofftype_loc (location_t loc, tree off); 196 197 #define convert_to_ptrofftype(t) convert_to_ptrofftype_loc (UNKNOWN_LOCATION, t) 198 199 /* Build and fold a POINTER_PLUS_EXPR at LOC offsetting PTR by OFF. */ 200 extern tree fold_build_pointer_plus_loc (location_t loc, tree ptr, tree off); 201 202 #define fold_build_pointer_plus(p,o) \ 203 fold_build_pointer_plus_loc (UNKNOWN_LOCATION, p, o) 204 205 /* Build and fold a POINTER_PLUS_EXPR at LOC offsetting PTR by OFF. */ 206 extern tree fold_build_pointer_plus_hwi_loc (location_t loc, tree ptr, HOST_WIDE_INT off); 207 208 #define fold_build_pointer_plus_hwi(p,o) \ 209 fold_build_pointer_plus_hwi_loc (UNKNOWN_LOCATION, p, o) 210 #endif // GCC_FOLD_CONST_H 211