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1 : : /* SSA name expresssons routines
2 : : Copyright (C) 2013-2024 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 : :
49 : : #define SSANAMES(fun) (fun)->gimple_df->ssa_names
50 : : #define DEFAULT_DEFS(fun) (fun)->gimple_df->default_defs
51 : :
52 : : #define num_ssa_names (vec_safe_length (cfun->gimple_df->ssa_names))
53 : : #define ssa_name(i) ((*cfun->gimple_df->ssa_names)[(i)])
54 : :
55 : : #define FOR_EACH_SSA_NAME(I, VAR, FN) \
56 : : for (I = 1; SSANAMES (FN)->iterate (I, &VAR); ++I) \
57 : : if (VAR)
58 : :
59 : : /* Sets the value range to SSA. */
60 : : extern bool set_range_info (tree, const vrange &);
61 : : extern void set_nonzero_bits (tree, const wide_int &);
62 : : extern void set_bitmask (tree, const wide_int &value, const wide_int &mask);
63 : : extern wide_int get_nonzero_bits (const_tree);
64 : : extern bool ssa_name_has_boolean_range (tree);
65 : : extern void init_ssanames (struct function *, int);
66 : : extern void fini_ssanames (struct function *);
67 : : extern void ssanames_print_statistics (void);
68 : : extern tree make_ssa_name_fn (struct function *, tree, gimple *,
69 : : unsigned int version = 0);
70 : : extern void init_ssa_name_imm_use (tree);
71 : : extern void release_ssa_name_fn (struct function *, tree);
72 : : extern bool get_ptr_info_alignment (struct ptr_info_def *, unsigned int *,
73 : : unsigned int *);
74 : : extern void mark_ptr_info_alignment_unknown (struct ptr_info_def *);
75 : : extern void set_ptr_info_alignment (struct ptr_info_def *, unsigned int,
76 : : unsigned int);
77 : : extern void adjust_ptr_info_misalignment (struct ptr_info_def *, poly_uint64);
78 : : extern struct ptr_info_def *get_ptr_info (tree);
79 : : extern void set_ptr_nonnull (tree);
80 : :
81 : : extern tree copy_ssa_name_fn (struct function *, tree, gimple *);
82 : : extern void duplicate_ssa_name_ptr_info (tree, struct ptr_info_def *);
83 : : extern tree duplicate_ssa_name_fn (struct function *, tree, gimple *);
84 : : extern void duplicate_ssa_name_range_info (tree dest, tree src);
85 : : extern void reset_flow_sensitive_info (tree);
86 : : extern void reset_flow_sensitive_info_in_bb (basic_block);
87 : : extern void release_defs (gimple *);
88 : : extern void replace_ssa_name_symbol (tree, tree);
89 : : extern void flush_ssaname_freelist (void);
90 : :
91 : :
92 : : /* Return an SSA_NAME node for variable VAR defined in statement STMT
93 : : in function cfun. */
94 : :
95 : : inline tree
96 : 98852637 : make_ssa_name (tree var, gimple *stmt = NULL)
97 : : {
98 : 98353400 : return make_ssa_name_fn (cfun, var, stmt);
99 : : }
100 : :
101 : : /* Return an SSA_NAME node using the template SSA name NAME defined in
102 : : statement STMT in function cfun. */
103 : :
104 : : inline tree
105 : 1654572 : copy_ssa_name (tree var, gimple *stmt = NULL)
106 : : {
107 : 1654572 : return copy_ssa_name_fn (cfun, var, stmt);
108 : : }
109 : :
110 : : /* Creates a duplicate of a SSA name NAME tobe defined by statement STMT
111 : : in function cfun. */
112 : :
113 : : inline tree
114 : 14228912 : duplicate_ssa_name (tree var, gimple *stmt)
115 : : {
116 : 14228912 : return duplicate_ssa_name_fn (cfun, var, stmt);
117 : : }
118 : :
119 : : /* Release the SSA name NAME used in function cfun. */
120 : :
121 : : inline void
122 : 67990031 : release_ssa_name (tree name)
123 : : {
124 : 67990031 : release_ssa_name_fn (cfun, name);
125 : 67242747 : }
126 : :
127 : : /* Return an anonymous SSA_NAME node for type TYPE defined in statement STMT
128 : : in function cfun. Arrange so that it uses NAME in dumps. */
129 : :
130 : : inline tree
131 : 6190273 : make_temp_ssa_name (tree type, gimple *stmt, const char *name)
132 : : {
133 : 6190273 : tree ssa_name;
134 : 6190273 : gcc_checking_assert (TYPE_P (type));
135 : 6190273 : ssa_name = make_ssa_name_fn (cfun, type, stmt);
136 : 6190273 : SET_SSA_NAME_VAR_OR_IDENTIFIER (ssa_name, get_identifier (name));
137 : 6190273 : return ssa_name;
138 : : }
139 : :
140 : : /* A class which is used to save/restore the flow sensitive information. */
141 : : class flow_sensitive_info_storage
142 : : {
143 : : public:
144 : : void save (tree);
145 : : void save_and_clear (tree);
146 : : void restore (tree);
147 : : void clear_storage ();
148 : : private:
149 : : /* 0 means there is nothing saved.
150 : : 1 means non pointer is saved.
151 : : -1 means a pointer type is saved.
152 : : -2 means a pointer type is saved but no information was saved. */
153 : : int state = 0;
154 : : /* The range info for non pointers */
155 : : vrange_storage *range_info = nullptr;
156 : : /* Flow sensitive pointer information. */
157 : : unsigned int align = 0;
158 : : unsigned int misalign = 0;
159 : : bool null = true;
160 : : };
161 : :
162 : : #endif /* GCC_TREE_SSANAMES_H */
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