1 /* Fold a constant sub-tree into a single node for C-compiler
2 Copyright (C) 1987-2019 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_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
,
72 extern bool fold_convertible_p (const_tree
, const_tree
);
73 #define fold_convert(T1,T2)\
74 fold_convert_loc (UNKNOWN_LOCATION, T1, T2)
75 extern tree
fold_convert_loc (location_t
, tree
, tree
);
76 extern tree
fold_single_bit_test (location_t
, enum tree_code
, tree
, tree
, tree
);
77 extern tree
fold_ignored_result (tree
);
78 extern tree
fold_abs_const (tree
, tree
);
79 extern tree
fold_indirect_ref_1 (location_t
, tree
, tree
);
80 extern void fold_defer_overflow_warnings (void);
81 extern void fold_undefer_overflow_warnings (bool, const gimple
*, int);
82 extern void fold_undefer_and_ignore_overflow_warnings (void);
83 extern bool fold_deferring_overflow_warnings_p (void);
84 extern void fold_overflow_warning (const char*, enum warn_strict_overflow_code
);
85 extern enum tree_code
fold_div_compare (enum tree_code
, tree
, tree
,
86 tree
*, tree
*, bool *);
87 extern bool operand_equal_p (const_tree
, const_tree
, unsigned int);
88 extern int multiple_of_p (tree
, const_tree
, const_tree
);
89 #define omit_one_operand(T1,T2,T3)\
90 omit_one_operand_loc (UNKNOWN_LOCATION, T1, T2, T3)
91 extern tree
omit_one_operand_loc (location_t
, tree
, tree
, tree
);
92 #define omit_two_operands(T1,T2,T3,T4)\
93 omit_two_operands_loc (UNKNOWN_LOCATION, T1, T2, T3, T4)
94 extern tree
omit_two_operands_loc (location_t
, tree
, tree
, tree
, tree
);
95 #define invert_truthvalue(T)\
96 invert_truthvalue_loc (UNKNOWN_LOCATION, T)
97 extern tree
invert_truthvalue_loc (location_t
, tree
);
98 extern tree
fold_unary_to_constant (enum tree_code
, tree
, tree
);
99 extern tree
fold_binary_to_constant (enum tree_code
, tree
, tree
, tree
);
100 extern tree
fold_bit_and_mask (tree
, tree
, enum tree_code
,
101 tree
, enum tree_code
, tree
, tree
,
102 tree
, enum tree_code
, tree
, tree
, tree
*);
103 extern tree
fold_read_from_constant_string (tree
);
104 extern tree
fold_read_from_vector (tree
, poly_uint64
);
105 #if GCC_VEC_PERN_INDICES_H
106 extern tree
fold_vec_perm (tree
, tree
, tree
, const vec_perm_indices
&);
108 extern bool wide_int_binop (wide_int
&res
, enum tree_code
,
109 const wide_int
&arg1
, const wide_int
&arg2
,
110 signop
, wi::overflow_type
*);
111 extern tree
int_const_binop (enum tree_code
, const_tree
, const_tree
, int = 1);
112 #define build_fold_addr_expr(T)\
113 build_fold_addr_expr_loc (UNKNOWN_LOCATION, (T))
114 extern tree
build_fold_addr_expr_loc (location_t
, tree
);
115 #define build_fold_addr_expr_with_type(T,TYPE)\
116 build_fold_addr_expr_with_type_loc (UNKNOWN_LOCATION, (T), TYPE)
117 extern tree
build_fold_addr_expr_with_type_loc (location_t
, tree
, tree
);
118 extern tree
fold_build_cleanup_point_expr (tree type
, tree expr
);
119 #define build_fold_indirect_ref(T)\
120 build_fold_indirect_ref_loc (UNKNOWN_LOCATION, T)
121 extern tree
build_fold_indirect_ref_loc (location_t
, tree
);
122 #define fold_indirect_ref(T)\
123 fold_indirect_ref_loc (UNKNOWN_LOCATION, T)
124 extern tree
fold_indirect_ref_loc (location_t
, tree
);
125 extern tree
build_simple_mem_ref_loc (location_t
, tree
);
126 #define build_simple_mem_ref(T)\
127 build_simple_mem_ref_loc (UNKNOWN_LOCATION, T)
128 extern poly_offset_int
mem_ref_offset (const_tree
);
129 extern tree
build_invariant_address (tree
, tree
, poly_int64
);
130 extern tree
constant_boolean_node (bool, tree
);
131 extern tree
div_if_zero_remainder (const_tree
, const_tree
);
133 extern bool tree_swap_operands_p (const_tree
, const_tree
);
134 extern enum tree_code
swap_tree_comparison (enum tree_code
);
136 extern bool ptr_difference_const (tree
, tree
, poly_int64_pod
*);
137 extern enum tree_code
invert_tree_comparison (enum tree_code
, bool);
138 extern bool inverse_conditions_p (const_tree
, const_tree
);
140 extern bool tree_unary_nonzero_warnv_p (enum tree_code
, tree
, tree
, bool *);
141 extern bool tree_binary_nonzero_warnv_p (enum tree_code
, tree
, tree
, tree op1
,
143 extern bool tree_single_nonzero_warnv_p (tree
, bool *);
144 extern bool tree_unary_nonnegative_warnv_p (enum tree_code
, tree
, tree
,
146 extern bool tree_binary_nonnegative_warnv_p (enum tree_code
, tree
, tree
, tree
,
148 extern bool tree_single_nonnegative_warnv_p (tree
, bool *, int);
149 extern bool tree_call_nonnegative_warnv_p (tree
, combined_fn
, tree
, tree
,
152 extern bool integer_valued_real_unary_p (tree_code
, tree
, int);
153 extern bool integer_valued_real_binary_p (tree_code
, tree
, tree
, int);
154 extern bool integer_valued_real_call_p (combined_fn
, tree
, tree
, int);
155 extern bool integer_valued_real_single_p (tree
, int);
156 extern bool integer_valued_real_p (tree
, int = 0);
158 extern bool fold_real_zero_addition_p (const_tree
, const_tree
, int);
159 extern tree
combine_comparisons (location_t
, enum tree_code
, enum tree_code
,
160 enum tree_code
, tree
, tree
, tree
);
161 extern void debug_fold_checksum (const_tree
);
162 extern bool may_negate_without_overflow_p (const_tree
);
163 #define round_up(T,N) round_up_loc (UNKNOWN_LOCATION, T, N)
164 extern tree
round_up_loc (location_t
, tree
, unsigned int);
165 #define round_down(T,N) round_down_loc (UNKNOWN_LOCATION, T, N)
166 extern tree
round_down_loc (location_t
, tree
, int);
167 extern tree
size_int_kind (poly_int64
, enum size_type_kind
);
168 #define size_binop(CODE,T1,T2)\
169 size_binop_loc (UNKNOWN_LOCATION, CODE, T1, T2)
170 extern tree
size_binop_loc (location_t
, enum tree_code
, tree
, tree
);
171 #define size_diffop(T1,T2)\
172 size_diffop_loc (UNKNOWN_LOCATION, T1, T2)
173 extern tree
size_diffop_loc (location_t
, tree
, tree
);
175 /* Return an expr equal to X but certainly not valid as an lvalue. */
176 #define non_lvalue(T) non_lvalue_loc (UNKNOWN_LOCATION, T)
177 extern tree
non_lvalue_loc (location_t
, tree
);
179 extern bool tree_expr_nonzero_p (tree
);
180 extern bool tree_expr_nonnegative_p (tree
);
181 extern bool tree_expr_nonnegative_warnv_p (tree
, bool *, int = 0);
182 extern tree
make_range (tree
, int *, tree
*, tree
*, bool *);
183 extern tree
make_range_step (location_t
, enum tree_code
, tree
, tree
, tree
,
184 tree
*, tree
*, int *, bool *);
185 extern tree
range_check_type (tree
);
186 extern tree
build_range_check (location_t
, tree
, tree
, int, tree
, tree
);
187 extern bool merge_ranges (int *, tree
*, tree
*, int, tree
, tree
, int,
189 extern tree
sign_bit_p (tree
, const_tree
);
190 extern tree
exact_inverse (tree
, tree
);
191 extern bool expr_not_equal_to (tree t
, const wide_int
&);
192 extern tree
const_unop (enum tree_code
, tree
, tree
);
193 extern tree
const_binop (enum tree_code
, tree
, tree
, tree
);
194 extern bool negate_mathfn_p (combined_fn
);
195 extern const char *c_getstr (tree
, unsigned HOST_WIDE_INT
* = NULL
);
196 extern wide_int
tree_nonzero_bits (const_tree
);
198 /* Return OFF converted to a pointer offset type suitable as offset for
199 POINTER_PLUS_EXPR. Use location LOC for this conversion. */
200 extern tree
convert_to_ptrofftype_loc (location_t loc
, tree off
);
202 #define convert_to_ptrofftype(t) convert_to_ptrofftype_loc (UNKNOWN_LOCATION, t)
204 /* Build and fold a POINTER_PLUS_EXPR at LOC offsetting PTR by OFF. */
205 extern tree
fold_build_pointer_plus_loc (location_t loc
, tree ptr
, tree off
);
207 #define fold_build_pointer_plus(p,o) \
208 fold_build_pointer_plus_loc (UNKNOWN_LOCATION, p, o)
210 /* Build and fold a POINTER_PLUS_EXPR at LOC offsetting PTR by OFF. */
211 extern tree
fold_build_pointer_plus_hwi_loc (location_t loc
, tree ptr
, HOST_WIDE_INT off
);
213 #define fold_build_pointer_plus_hwi(p,o) \
214 fold_build_pointer_plus_hwi_loc (UNKNOWN_LOCATION, p, o)
215 #endif // GCC_FOLD_CONST_H