Branch data Line data Source code
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 wide_int get_known_nonzero_bits (const_tree);
65 : : extern bool ssa_name_has_boolean_range (tree);
66 : : extern void init_ssanames (struct function *, int);
67 : : extern void fini_ssanames (struct function *);
68 : : extern void ssanames_print_statistics (void);
69 : : extern tree make_ssa_name_fn (struct function *, tree, gimple *,
70 : : unsigned int version = 0);
71 : : extern void init_ssa_name_imm_use (tree);
72 : : extern void release_ssa_name_fn (struct function *, tree);
73 : : extern bool get_ptr_info_alignment (struct ptr_info_def *, unsigned int *,
74 : : unsigned int *);
75 : : extern void mark_ptr_info_alignment_unknown (struct ptr_info_def *);
76 : : extern void set_ptr_info_alignment (struct ptr_info_def *, unsigned int,
77 : : unsigned int);
78 : : extern void adjust_ptr_info_misalignment (struct ptr_info_def *, poly_uint64);
79 : : extern struct ptr_info_def *get_ptr_info (tree);
80 : : extern void set_ptr_nonnull (tree);
81 : :
82 : : extern tree copy_ssa_name_fn (struct function *, tree, gimple *);
83 : : extern tree duplicate_ssa_name_fn (struct function *, tree, gimple *);
84 : : extern void duplicate_ssa_name_ptr_info (tree, struct ptr_info_def *);
85 : : extern void duplicate_ssa_name_range_info (tree dest, tree src);
86 : : extern void maybe_duplicate_ssa_info_at_copy (tree dest, tree src);
87 : : extern void reset_flow_sensitive_info (tree);
88 : : extern void reset_flow_sensitive_info_in_bb (basic_block);
89 : : extern void release_defs (gimple *);
90 : : extern void replace_ssa_name_symbol (tree, tree);
91 : : extern void flush_ssaname_freelist (void);
92 : :
93 : :
94 : : /* Return an SSA_NAME node for variable VAR defined in statement STMT
95 : : in function cfun. */
96 : :
97 : : inline tree
98 : 101807596 : make_ssa_name (tree var, gimple *stmt = NULL)
99 : : {
100 : 101243183 : return make_ssa_name_fn (cfun, var, stmt);
101 : : }
102 : :
103 : : /* Return an SSA_NAME node using the template SSA name NAME defined in
104 : : statement STMT in function cfun. */
105 : :
106 : : inline tree
107 : 1736967 : copy_ssa_name (tree var, gimple *stmt = NULL)
108 : : {
109 : 1736967 : return copy_ssa_name_fn (cfun, var, stmt);
110 : : }
111 : :
112 : : /* Creates a duplicate of a SSA name NAME tobe defined by statement STMT
113 : : in function cfun. */
114 : :
115 : : inline tree
116 : 15411449 : duplicate_ssa_name (tree var, gimple *stmt)
117 : : {
118 : 15411449 : return duplicate_ssa_name_fn (cfun, var, stmt);
119 : : }
120 : :
121 : : /* Release the SSA name NAME used in function cfun. */
122 : :
123 : : inline void
124 : 71402222 : release_ssa_name (tree name)
125 : : {
126 : 71402222 : release_ssa_name_fn (cfun, name);
127 : 70575139 : }
128 : :
129 : : /* Return an anonymous SSA_NAME node for type TYPE defined in statement STMT
130 : : in function cfun. Arrange so that it uses NAME in dumps. */
131 : :
132 : : inline tree
133 : 6402879 : make_temp_ssa_name (tree type, gimple *stmt, const char *name)
134 : : {
135 : 6402879 : tree ssa_name;
136 : 6402879 : gcc_checking_assert (TYPE_P (type));
137 : 6402879 : ssa_name = make_ssa_name_fn (cfun, type, stmt);
138 : 6402879 : SET_SSA_NAME_VAR_OR_IDENTIFIER (ssa_name, get_identifier (name));
139 : 6402879 : return ssa_name;
140 : : }
141 : :
142 : : /* A class which is used to save/restore the flow sensitive information. */
143 : : class flow_sensitive_info_storage
144 : : {
145 : : public:
146 : : void save (tree);
147 : : void save_and_clear (tree);
148 : : void restore (tree);
149 : : void clear_storage ();
150 : : private:
151 : : /* 0 means there is nothing saved.
152 : : 1 means non pointer is saved.
153 : : -1 means a pointer type is saved.
154 : : -2 means a pointer type is saved but no information was saved. */
155 : : int state = 0;
156 : : /* The range info for non pointers */
157 : : vrange_storage *range_info = nullptr;
158 : : /* Flow sensitive pointer information. */
159 : : unsigned int align = 0;
160 : : unsigned int misalign = 0;
161 : : bool null = true;
162 : : };
163 : :
164 : : #endif /* GCC_TREE_SSANAMES_H */
|
