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gcc.gnu.org Git - gcc.git/blob - gcc/fold-const.h
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1 /* Fold a constant sub-tree into a single node for C-compiler
2 Copyright (C) 1987-2015 Free Software Foundation, Inc.
4 This file is part of GCC.
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
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
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/>. */
20 #ifndef GCC_FOLD_CONST_H
21 #define GCC_FOLD_CONST_H
23 /* Non-zero if we are folding constants inside an initializer; zero
25 extern int folding_initializer
;
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);
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. */
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_stat_loc (UNKNOWN_LOCATION, c, t1, t2 MEM_STAT_INFO)
52 #define fold_build1_loc(l,c,t1,t2)\
53 fold_build1_stat_loc (l, c, t1, t2 MEM_STAT_INFO)
54 extern tree
fold_build1_stat_loc (location_t
, enum tree_code
, tree
,
56 #define fold_build2(c,t1,t2,t3)\
57 fold_build2_stat_loc (UNKNOWN_LOCATION, c, t1, t2, t3 MEM_STAT_INFO)
58 #define fold_build2_loc(l,c,t1,t2,t3)\
59 fold_build2_stat_loc (l, c, t1, t2, t3 MEM_STAT_INFO)
60 extern tree
fold_build2_stat_loc (location_t
, enum tree_code
, tree
, tree
,
62 #define fold_build3(c,t1,t2,t3,t4)\
63 fold_build3_stat_loc (UNKNOWN_LOCATION, c, t1, t2, t3, t4 MEM_STAT_INFO)
64 #define fold_build3_loc(l,c,t1,t2,t3,t4)\
65 fold_build3_stat_loc (l, c, t1, t2, t3, t4 MEM_STAT_INFO)
66 extern tree
fold_build3_stat_loc (location_t
, enum tree_code
, tree
, tree
, tree
,
68 extern tree
fold_build1_initializer_loc (location_t
, enum tree_code
, tree
, tree
);
69 extern tree
fold_build2_initializer_loc (location_t
, enum tree_code
, tree
, tree
, tree
);
70 #define fold_build_call_array(T1,T2,N,T4)\
71 fold_build_call_array_loc (UNKNOWN_LOCATION, T1, T2, N, T4)
72 extern tree
fold_build_call_array_loc (location_t
, tree
, tree
, int, tree
*);
73 #define fold_build_call_array_initializer(T1,T2,N,T4)\
74 fold_build_call_array_initializer_loc (UNKNOWN_LOCATION, T1, T2, N, T4)
75 extern tree
fold_build_call_array_initializer_loc (location_t
, tree
, tree
, int, tree
*);
76 extern bool fold_convertible_p (const_tree
, const_tree
);
77 #define fold_convert(T1,T2)\
78 fold_convert_loc (UNKNOWN_LOCATION, T1, T2)
79 extern tree
fold_convert_loc (location_t
, tree
, tree
);
80 extern tree
fold_single_bit_test (location_t
, enum tree_code
, tree
, tree
, tree
);
81 extern tree
fold_ignored_result (tree
);
82 extern tree
fold_abs_const (tree
, tree
);
83 extern tree
fold_indirect_ref_1 (location_t
, tree
, tree
);
84 extern void fold_defer_overflow_warnings (void);
85 extern void fold_undefer_overflow_warnings (bool, const gimple
*, int);
86 extern void fold_undefer_and_ignore_overflow_warnings (void);
87 extern bool fold_deferring_overflow_warnings_p (void);
88 extern int operand_equal_p (const_tree
, const_tree
, unsigned int);
89 extern int multiple_of_p (tree
, const_tree
, const_tree
);
90 #define omit_one_operand(T1,T2,T3)\
91 omit_one_operand_loc (UNKNOWN_LOCATION, T1, T2, T3)
92 extern tree
omit_one_operand_loc (location_t
, tree
, tree
, tree
);
93 #define omit_two_operands(T1,T2,T3,T4)\
94 omit_two_operands_loc (UNKNOWN_LOCATION, T1, T2, T3, T4)
95 extern tree
omit_two_operands_loc (location_t
, tree
, tree
, tree
, tree
);
96 #define invert_truthvalue(T)\
97 invert_truthvalue_loc (UNKNOWN_LOCATION, T)
98 extern tree
invert_truthvalue_loc (location_t
, tree
);
99 extern tree
fold_unary_to_constant (enum tree_code
, tree
, tree
);
100 extern tree
fold_binary_to_constant (enum tree_code
, tree
, tree
, tree
);
101 extern tree
fold_read_from_constant_string (tree
);
102 extern tree
int_const_binop (enum tree_code
, const_tree
, const_tree
);
103 #define build_fold_addr_expr(T)\
104 build_fold_addr_expr_loc (UNKNOWN_LOCATION, (T))
105 extern tree
build_fold_addr_expr_loc (location_t
, tree
);
106 #define build_fold_addr_expr_with_type(T,TYPE)\
107 build_fold_addr_expr_with_type_loc (UNKNOWN_LOCATION, (T), TYPE)
108 extern tree
build_fold_addr_expr_with_type_loc (location_t
, tree
, tree
);
109 extern tree
fold_build_cleanup_point_expr (tree type
, tree expr
);
110 extern tree
fold_strip_sign_ops (tree
);
111 #define build_fold_indirect_ref(T)\
112 build_fold_indirect_ref_loc (UNKNOWN_LOCATION, T)
113 extern tree
build_fold_indirect_ref_loc (location_t
, tree
);
114 #define fold_indirect_ref(T)\
115 fold_indirect_ref_loc (UNKNOWN_LOCATION, T)
116 extern tree
fold_indirect_ref_loc (location_t
, tree
);
117 extern tree
build_simple_mem_ref_loc (location_t
, tree
);
118 #define build_simple_mem_ref(T)\
119 build_simple_mem_ref_loc (UNKNOWN_LOCATION, T)
120 extern offset_int
mem_ref_offset (const_tree
);
121 extern tree
build_invariant_address (tree
, tree
, HOST_WIDE_INT
);
122 extern tree
constant_boolean_node (bool, tree
);
123 extern tree
div_if_zero_remainder (const_tree
, const_tree
);
125 extern bool tree_swap_operands_p (const_tree
, const_tree
, bool);
126 extern enum tree_code
swap_tree_comparison (enum tree_code
);
128 extern bool ptr_difference_const (tree
, tree
, HOST_WIDE_INT
*);
129 extern enum tree_code
invert_tree_comparison (enum tree_code
, bool);
131 extern bool tree_unary_nonzero_warnv_p (enum tree_code
, tree
, tree
, bool *);
132 extern bool tree_binary_nonzero_warnv_p (enum tree_code
, tree
, tree
, tree op1
,
134 extern bool tree_single_nonzero_warnv_p (tree
, bool *);
135 extern bool tree_unary_nonnegative_warnv_p (enum tree_code
, tree
, tree
,
137 extern bool tree_binary_nonnegative_warnv_p (enum tree_code
, tree
, tree
, tree
,
139 extern bool tree_single_nonnegative_warnv_p (tree
, bool *, int);
140 extern bool tree_call_nonnegative_warnv_p (tree
, tree
, tree
, tree
, bool *,
143 extern bool fold_real_zero_addition_p (const_tree
, const_tree
, int);
144 extern tree
combine_comparisons (location_t
, enum tree_code
, enum tree_code
,
145 enum tree_code
, tree
, tree
, tree
);
146 extern void debug_fold_checksum (const_tree
);
147 extern bool may_negate_without_overflow_p (const_tree
);
148 #define round_up(T,N) round_up_loc (UNKNOWN_LOCATION, T, N)
149 extern tree
round_up_loc (location_t
, tree
, unsigned int);
150 #define round_down(T,N) round_down_loc (UNKNOWN_LOCATION, T, N)
151 extern tree
round_down_loc (location_t
, tree
, int);
152 extern tree
size_int_kind (HOST_WIDE_INT
, enum size_type_kind
);
153 #define size_binop(CODE,T1,T2)\
154 size_binop_loc (UNKNOWN_LOCATION, CODE, T1, T2)
155 extern tree
size_binop_loc (location_t
, enum tree_code
, tree
, tree
);
156 #define size_diffop(T1,T2)\
157 size_diffop_loc (UNKNOWN_LOCATION, T1, T2)
158 extern tree
size_diffop_loc (location_t
, tree
, tree
);
160 /* Return an expr equal to X but certainly not valid as an lvalue. */
161 #define non_lvalue(T) non_lvalue_loc (UNKNOWN_LOCATION, T)
162 extern tree
non_lvalue_loc (location_t
, tree
);
164 extern bool tree_expr_nonnegative_p (tree
);
165 extern bool tree_expr_nonnegative_warnv_p (tree
, bool *, int = 0);
166 extern tree
make_range (tree
, int *, tree
*, tree
*, bool *);
167 extern tree
make_range_step (location_t
, enum tree_code
, tree
, tree
, tree
,
168 tree
*, tree
*, int *, bool *);
169 extern tree
build_range_check (location_t
, tree
, tree
, int, tree
, tree
);
170 extern bool merge_ranges (int *, tree
*, tree
*, int, tree
, tree
, int,
172 extern tree
sign_bit_p (tree
, const_tree
);
173 extern tree
exact_inverse (tree
, tree
);
174 extern tree
const_unop (enum tree_code
, tree
, tree
);
175 extern tree
const_binop (enum tree_code
, tree
, tree
, tree
);
177 /* Return OFF converted to a pointer offset type suitable as offset for
178 POINTER_PLUS_EXPR. Use location LOC for this conversion. */
179 extern tree
convert_to_ptrofftype_loc (location_t loc
, tree off
);
181 #define convert_to_ptrofftype(t) convert_to_ptrofftype_loc (UNKNOWN_LOCATION, t)
183 /* Build and fold a POINTER_PLUS_EXPR at LOC offsetting PTR by OFF. */
184 extern tree
fold_build_pointer_plus_loc (location_t loc
, tree ptr
, tree off
);
186 #define fold_build_pointer_plus(p,o) \
187 fold_build_pointer_plus_loc (UNKNOWN_LOCATION, p, o)
189 /* Build and fold a POINTER_PLUS_EXPR at LOC offsetting PTR by OFF. */
190 extern tree
fold_build_pointer_plus_hwi_loc (location_t loc
, tree ptr
, HOST_WIDE_INT off
);
192 #define fold_build_pointer_plus_hwi(p,o) \
193 fold_build_pointer_plus_hwi_loc (UNKNOWN_LOCATION, p, o)
194 #endif // GCC_FOLD_CONST_H
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