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1 | /* SSA name expresssons routines | |
2 | Copyright (C) 2013-2021 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_TREE_SSANAMES_H | |
21 | #define GCC_TREE_SSANAMES_H | |
22 | ||
23 | /* Aliasing information for SSA_NAMEs representing pointer variables. */ | |
24 | ||
25 | struct GTY(()) ptr_info_def | |
26 | { | |
27 | /* The points-to solution. */ | |
28 | struct pt_solution pt; | |
29 | ||
30 | /* Alignment and misalignment of the pointer in bytes. Together | |
31 | align and misalign specify low known bits of the pointer. | |
32 | ptr & (align - 1) == misalign. */ | |
33 | ||
34 | /* When known, this is the power-of-two byte alignment of the object this | |
35 | pointer points into. This is usually DECL_ALIGN_UNIT for decls and | |
36 | MALLOC_ABI_ALIGNMENT for allocated storage. When the alignment is not | |
37 | known, it is zero. Do not access directly but use functions | |
38 | get_ptr_info_alignment, set_ptr_info_alignment, | |
39 | mark_ptr_info_alignment_unknown and similar. */ | |
40 | unsigned int align; | |
41 | ||
42 | /* When alignment is known, the byte offset this pointer differs from the | |
43 | above alignment. Access only through the same helper functions as align | |
44 | above. */ | |
45 | unsigned int misalign; | |
46 | }; | |
47 | ||
48 | /* Value range information for SSA_NAMEs representing non-pointer variables. */ | |
49 | ||
50 | struct GTY ((variable_size)) range_info_def { | |
51 | /* Minimum, maximum and nonzero bits. */ | |
52 | TRAILING_WIDE_INT_ACCESSOR (min, ints, 0) | |
53 | TRAILING_WIDE_INT_ACCESSOR (max, ints, 1) | |
54 | TRAILING_WIDE_INT_ACCESSOR (nonzero_bits, ints, 2) | |
55 | trailing_wide_ints <3> ints; | |
56 | }; | |
57 | ||
58 | ||
59 | #define SSANAMES(fun) (fun)->gimple_df->ssa_names | |
60 | #define DEFAULT_DEFS(fun) (fun)->gimple_df->default_defs | |
61 | ||
62 | #define num_ssa_names (vec_safe_length (cfun->gimple_df->ssa_names)) | |
63 | #define ssa_name(i) ((*cfun->gimple_df->ssa_names)[(i)]) | |
64 | ||
65 | #define FOR_EACH_SSA_NAME(I, VAR, FN) \ | |
66 | for (I = 1; SSANAMES (FN)->iterate (I, &VAR); ++I) \ | |
67 | if (VAR) | |
68 | ||
69 | /* Sets the value range to SSA. */ | |
70 | extern void set_range_info (tree, enum value_range_kind, const wide_int_ref &, | |
71 | const wide_int_ref &); | |
72 | extern void set_range_info (tree, const value_range &); | |
73 | extern void set_nonzero_bits (tree, const wide_int_ref &); | |
74 | extern wide_int get_nonzero_bits (const_tree); | |
75 | extern bool ssa_name_has_boolean_range (tree); | |
76 | extern void init_ssanames (struct function *, int); | |
77 | extern void fini_ssanames (struct function *); | |
78 | extern void ssanames_print_statistics (void); | |
79 | extern tree make_ssa_name_fn (struct function *, tree, gimple *, | |
80 | unsigned int version = 0); | |
81 | extern void init_ssa_name_imm_use (tree); | |
82 | extern void release_ssa_name_fn (struct function *, tree); | |
83 | extern bool get_ptr_info_alignment (struct ptr_info_def *, unsigned int *, | |
84 | unsigned int *); | |
85 | extern void mark_ptr_info_alignment_unknown (struct ptr_info_def *); | |
86 | extern void set_ptr_info_alignment (struct ptr_info_def *, unsigned int, | |
87 | unsigned int); | |
88 | extern void adjust_ptr_info_misalignment (struct ptr_info_def *, poly_uint64); | |
89 | extern struct ptr_info_def *get_ptr_info (tree); | |
90 | extern void set_ptr_nonnull (tree); | |
91 | ||
92 | extern tree copy_ssa_name_fn (struct function *, tree, gimple *); | |
93 | extern void duplicate_ssa_name_ptr_info (tree, struct ptr_info_def *); | |
94 | extern tree duplicate_ssa_name_fn (struct function *, tree, gimple *); | |
95 | extern void duplicate_ssa_name_range_info (tree, enum value_range_kind, | |
96 | struct range_info_def *); | |
97 | extern void reset_flow_sensitive_info (tree); | |
98 | extern void reset_flow_sensitive_info_in_bb (basic_block); | |
99 | extern void release_defs (gimple *); | |
100 | extern void replace_ssa_name_symbol (tree, tree); | |
101 | extern void flush_ssaname_freelist (void); | |
102 | ||
103 | ||
104 | /* Return an SSA_NAME node for variable VAR defined in statement STMT | |
105 | in function cfun. */ | |
106 | ||
107 | static inline tree | |
108 | make_ssa_name (tree var, gimple *stmt = NULL) | |
109 | { | |
110 | return make_ssa_name_fn (cfun, var, stmt); | |
111 | } | |
112 | ||
113 | /* Return an SSA_NAME node using the template SSA name NAME defined in | |
114 | statement STMT in function cfun. */ | |
115 | ||
116 | static inline tree | |
117 | copy_ssa_name (tree var, gimple *stmt = NULL) | |
118 | { | |
119 | return copy_ssa_name_fn (cfun, var, stmt); | |
120 | } | |
121 | ||
122 | /* Creates a duplicate of a SSA name NAME tobe defined by statement STMT | |
123 | in function cfun. */ | |
124 | ||
125 | static inline tree | |
126 | duplicate_ssa_name (tree var, gimple *stmt) | |
127 | { | |
128 | return duplicate_ssa_name_fn (cfun, var, stmt); | |
129 | } | |
130 | ||
131 | /* Release the SSA name NAME used in function cfun. */ | |
132 | ||
133 | static inline void | |
134 | release_ssa_name (tree name) | |
135 | { | |
136 | release_ssa_name_fn (cfun, name); | |
137 | } | |
138 | ||
139 | /* Return an anonymous SSA_NAME node for type TYPE defined in statement STMT | |
140 | in function cfun. Arrange so that it uses NAME in dumps. */ | |
141 | ||
142 | static inline tree | |
143 | make_temp_ssa_name (tree type, gimple *stmt, const char *name) | |
144 | { | |
145 | tree ssa_name; | |
146 | gcc_checking_assert (TYPE_P (type)); | |
147 | ssa_name = make_ssa_name_fn (cfun, type, stmt); | |
148 | SET_SSA_NAME_VAR_OR_IDENTIFIER (ssa_name, get_identifier (name)); | |
149 | return ssa_name; | |
150 | } | |
151 | ||
152 | ||
153 | #endif /* GCC_TREE_SSANAMES_H */ |