Mercurial > hg > CbC > CbC_gcc
comparison gcc/cselib.h @ 0:a06113de4d67
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author | kent <kent@cr.ie.u-ryukyu.ac.jp> |
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date | Fri, 17 Jul 2009 14:47:48 +0900 |
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children | 77e2b8dfacca |
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1 /* Common subexpression elimination for GNU compiler. | |
2 Copyright (C) 1987, 1988, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998, | |
3 1999, 2003, 2004, 2005, 2006, 2007, 2008 Free Software Foundation, Inc. | |
4 | |
5 This file is part of GCC. | |
6 | |
7 GCC is free software; you can redistribute it and/or modify it under | |
8 the terms of the GNU General Public License as published by the Free | |
9 Software Foundation; either version 3, or (at your option) any later | |
10 version. | |
11 | |
12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY | |
13 WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
15 for more details. | |
16 | |
17 You should have received a copy of the GNU General Public License | |
18 along with GCC; see the file COPYING3. If not see | |
19 <http://www.gnu.org/licenses/>. */ | |
20 | |
21 /* Describe a value. */ | |
22 typedef struct cselib_val_struct GTY(()) | |
23 { | |
24 /* The hash value. */ | |
25 unsigned int value; | |
26 | |
27 /* A VALUE rtx that points back to this structure. */ | |
28 rtx val_rtx; | |
29 | |
30 /* All rtl expressions that hold this value at the current time during a | |
31 scan. */ | |
32 struct elt_loc_list *locs; | |
33 | |
34 /* If this value is used as an address, points to a list of values that | |
35 use it as an address in a MEM. */ | |
36 struct elt_list *addr_list; | |
37 | |
38 struct cselib_val_struct *next_containing_mem; | |
39 } cselib_val; | |
40 | |
41 /* A list of rtl expressions that hold the same value. */ | |
42 struct elt_loc_list GTY(()) | |
43 { | |
44 /* Next element in the list. */ | |
45 struct elt_loc_list *next; | |
46 /* An rtl expression that holds the value. */ | |
47 rtx loc; | |
48 /* The insn that made the equivalence. */ | |
49 rtx setting_insn; | |
50 }; | |
51 | |
52 /* A list of cselib_val structures. */ | |
53 struct elt_list GTY(()) | |
54 { | |
55 struct elt_list *next; | |
56 cselib_val *elt; | |
57 }; | |
58 | |
59 extern void (*cselib_discard_hook) (cselib_val *); | |
60 | |
61 extern cselib_val *cselib_lookup (rtx, enum machine_mode, int); | |
62 extern void cselib_init (bool record_memory); | |
63 extern void cselib_clear_table (void); | |
64 extern void cselib_finish (void); | |
65 extern void cselib_process_insn (rtx); | |
66 extern enum machine_mode cselib_reg_set_mode (const_rtx); | |
67 extern int rtx_equal_for_cselib_p (rtx, rtx); | |
68 extern int references_value_p (const_rtx, int); | |
69 extern rtx cselib_expand_value_rtx (rtx, bitmap, int); | |
70 extern rtx cselib_subst_to_values (rtx); | |
71 extern void cselib_invalidate_rtx (rtx); |