Mercurial > hg > CbC > GCC_original
comparison gcc/lower-subreg.h @ 16:04ced10e8804
gcc 7
| author | kono |
|---|---|
| date | Fri, 27 Oct 2017 22:46:09 +0900 |
| parents | |
| children | 84e7813d76e9 |
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| 15:561a7518be6b | 16:04ced10e8804 |
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| 1 /* Target-dependent costs for lower-subreg.c. | |
| 2 Copyright (C) 2012-2017 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 LOWER_SUBREG_H | |
| 21 #define LOWER_SUBREG_H 1 | |
| 22 | |
| 23 /* Information about whether, and where, lower-subreg should be applied. */ | |
| 24 struct lower_subreg_choices { | |
| 25 /* A boolean vector for move splitting that is indexed by mode and is | |
| 26 true for each mode that is to have its copies split. */ | |
| 27 bool move_modes_to_split[MAX_MACHINE_MODE]; | |
| 28 | |
| 29 /* True if zero-extensions from word_mode to twice_word_mode should | |
| 30 be split. */ | |
| 31 bool splitting_zext; | |
| 32 | |
| 33 /* Index X is true if twice_word_mode shifts by X + BITS_PER_WORD | |
| 34 should be split. */ | |
| 35 bool splitting_ashift[MAX_BITS_PER_WORD]; | |
| 36 bool splitting_lshiftrt[MAX_BITS_PER_WORD]; | |
| 37 bool splitting_ashiftrt[MAX_BITS_PER_WORD]; | |
| 38 | |
| 39 /* True if there is at least one mode that is worth splitting. */ | |
| 40 bool something_to_do; | |
| 41 }; | |
| 42 | |
| 43 /* Target-specific information for the subreg lowering pass. */ | |
| 44 struct target_lower_subreg { | |
| 45 /* An integer mode that is twice as wide as word_mode. */ | |
| 46 scalar_int_mode_pod x_twice_word_mode; | |
| 47 | |
| 48 /* What we have decided to do when optimizing for size (index 0) | |
| 49 and speed (index 1). */ | |
| 50 struct lower_subreg_choices x_choices[2]; | |
| 51 }; | |
| 52 | |
| 53 extern struct target_lower_subreg default_target_lower_subreg; | |
| 54 #if SWITCHABLE_TARGET | |
| 55 extern struct target_lower_subreg *this_target_lower_subreg; | |
| 56 #else | |
| 57 #define this_target_lower_subreg (&default_target_lower_subreg) | |
| 58 #endif | |
| 59 | |
| 60 #endif |