1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
|
/* SSA name expresssons routines
Copyright (C) 2013-2014 Free Software Foundation, Inc.
This file is part of GCC.
GCC is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
Software Foundation; either version 3, or (at your option) any later
version.
GCC is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
You should have received a copy of the GNU General Public License
along with GCC; see the file COPYING3. If not see
<http://www.gnu.org/licenses/>. */
#ifndef GCC_TREE_SSANAMES_H
#define GCC_TREE_SSANAMES_H
/* Aliasing information for SSA_NAMEs representing pointer variables. */
struct GTY(()) ptr_info_def
{
/* The points-to solution. */
struct pt_solution pt;
/* Alignment and misalignment of the pointer in bytes. Together
align and misalign specify low known bits of the pointer.
ptr & (align - 1) == misalign. */
/* When known, this is the power-of-two byte alignment of the object this
pointer points into. This is usually DECL_ALIGN_UNIT for decls and
MALLOC_ABI_ALIGNMENT for allocated storage. When the alignment is not
known, it is zero. Do not access directly but use functions
get_ptr_info_alignment, set_ptr_info_alignment,
mark_ptr_info_alignment_unknown and similar. */
unsigned int align;
/* When alignment is known, the byte offset this pointer differs from the
above alignment. Access only through the same helper functions as align
above. */
unsigned int misalign;
};
/* Value range information for SSA_NAMEs representing non-pointer variables. */
struct GTY (()) range_info_def {
/* Minimum for value range. */
double_int min;
/* Maximum for value range. */
double_int max;
/* Non-zero bits - bits not set are guaranteed to be always zero. */
double_int nonzero_bits;
};
#define SSANAMES(fun) (fun)->gimple_df->ssa_names
#define MODIFIED_NORETURN_CALLS(fun) (fun)->gimple_df->modified_noreturn_calls
#define DEFAULT_DEFS(fun) (fun)->gimple_df->default_defs
#define num_ssa_names (vec_safe_length (cfun->gimple_df->ssa_names))
#define ssa_name(i) ((*cfun->gimple_df->ssa_names)[(i)])
/* Type of value ranges. See value_range_d In tree-vrp.c for a
description of these types. */
enum value_range_type { VR_UNDEFINED, VR_RANGE, VR_ANTI_RANGE, VR_VARYING };
/* Sets the value range to SSA. */
extern void set_range_info (tree, enum value_range_type, double_int,
double_int);
/* Gets the value range from SSA. */
extern enum value_range_type get_range_info (const_tree, double_int *,
double_int *);
extern void set_nonzero_bits (tree, double_int);
extern double_int get_nonzero_bits (const_tree);
extern void init_ssanames (struct function *, int);
extern void fini_ssanames (void);
extern void ssanames_print_statistics (void);
extern tree make_ssa_name_fn (struct function *, tree, gimple);
extern void release_ssa_name_fn (struct function *, tree);
extern bool get_ptr_info_alignment (struct ptr_info_def *, unsigned int *,
unsigned int *);
extern void mark_ptr_info_alignment_unknown (struct ptr_info_def *);
extern void set_ptr_info_alignment (struct ptr_info_def *, unsigned int,
unsigned int);
extern void adjust_ptr_info_misalignment (struct ptr_info_def *,
unsigned int);
extern struct ptr_info_def *get_ptr_info (tree);
extern tree copy_ssa_name_fn (struct function *, tree, gimple);
extern void duplicate_ssa_name_ptr_info (tree, struct ptr_info_def *);
extern tree duplicate_ssa_name_fn (struct function *, tree, gimple);
extern void duplicate_ssa_name_range_info (tree, enum value_range_type,
struct range_info_def *);
extern void release_defs (gimple);
extern void replace_ssa_name_symbol (tree, tree);
/* Return an SSA_NAME node for variable VAR defined in statement STMT
in function cfun. */
static inline tree
make_ssa_name (tree var, gimple stmt)
{
return make_ssa_name_fn (cfun, var, stmt);
}
/* Return an SSA_NAME node using the template SSA name NAME defined in
statement STMT in function cfun. */
static inline tree
copy_ssa_name (tree var, gimple stmt)
{
return copy_ssa_name_fn (cfun, var, stmt);
}
/* Creates a duplicate of a SSA name NAME tobe defined by statement STMT
in function cfun. */
static inline tree
duplicate_ssa_name (tree var, gimple stmt)
{
return duplicate_ssa_name_fn (cfun, var, stmt);
}
/* Release the SSA name NAME used in function cfun. */
static inline void
release_ssa_name (tree name)
{
release_ssa_name_fn (cfun, name);
}
/* Return an anonymous SSA_NAME node for type TYPE defined in statement STMT
in function cfun. Arrange so that it uses NAME in dumps. */
static inline tree
make_temp_ssa_name (tree type, gimple stmt, const char *name)
{
tree ssa_name;
gcc_checking_assert (TYPE_P (type));
ssa_name = make_ssa_name_fn (cfun, type, stmt);
SET_SSA_NAME_VAR_OR_IDENTIFIER (ssa_name, get_identifier (name));
return ssa_name;
}
#endif /* GCC_TREE_SSANAMES_H */
|
