blob: 8076cb3c46984561a1809d9a5859773dbdc5955c (
plain)
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
|
/* Target-dependent costs for lower-subreg.c.
Copyright (C) 2012-2020 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 LOWER_SUBREG_H
#define LOWER_SUBREG_H 1
/* Information about whether, and where, lower-subreg should be applied. */
struct lower_subreg_choices {
/* A boolean vector for move splitting that is indexed by mode and is
true for each mode that is to have its copies split. */
bool move_modes_to_split[MAX_MACHINE_MODE];
/* True if zero-extensions from word_mode to twice_word_mode should
be split. */
bool splitting_zext;
/* Index X is true if twice_word_mode shifts by X + BITS_PER_WORD
should be split. */
bool splitting_ashift[MAX_BITS_PER_WORD];
bool splitting_lshiftrt[MAX_BITS_PER_WORD];
bool splitting_ashiftrt[MAX_BITS_PER_WORD];
/* True if there is at least one mode that is worth splitting. */
bool something_to_do;
};
/* Target-specific information for the subreg lowering pass. */
struct target_lower_subreg {
/* An integer mode that is twice as wide as word_mode. */
scalar_int_mode_pod x_twice_word_mode;
/* What we have decided to do when optimizing for size (index 0)
and speed (index 1). */
struct lower_subreg_choices x_choices[2];
};
extern struct target_lower_subreg default_target_lower_subreg;
#if SWITCHABLE_TARGET
extern struct target_lower_subreg *this_target_lower_subreg;
#else
#define this_target_lower_subreg (&default_target_lower_subreg)
#endif
#endif
|
