Mercurial > hg > CbC > CbC_gcc
annotate gcc/cselib.h @ 88:f214c1d5b862
merge 89
author | Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> |
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date | Tue, 20 Dec 2011 18:53:46 +0900 |
parents | f6334be47118 |
children | 04ced10e8804 |
rev | line source |
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0 | 1 /* Common subexpression elimination for GNU compiler. |
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2 Copyright (C) 1987, 1988, 1989, 1992, 1993, 1994, 1995, 1996, 1997, |
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3 1998, 1999, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010 |
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4 Free Software Foundation, Inc. |
0 | 5 |
6 This file is part of GCC. | |
7 | |
8 GCC is free software; you can redistribute it and/or modify it under | |
9 the terms of the GNU General Public License as published by the Free | |
10 Software Foundation; either version 3, or (at your option) any later | |
11 version. | |
12 | |
13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY | |
14 WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
16 for more details. | |
17 | |
18 You should have received a copy of the GNU General Public License | |
19 along with GCC; see the file COPYING3. If not see | |
20 <http://www.gnu.org/licenses/>. */ | |
21 | |
22 /* Describe a value. */ | |
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23 typedef struct cselib_val_struct { |
0 | 24 /* The hash value. */ |
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25 unsigned int hash; |
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26 |
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27 /* A unique id assigned to values. */ |
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28 int uid; |
0 | 29 |
30 /* A VALUE rtx that points back to this structure. */ | |
31 rtx val_rtx; | |
32 | |
33 /* All rtl expressions that hold this value at the current time during a | |
34 scan. */ | |
35 struct elt_loc_list *locs; | |
36 | |
37 /* If this value is used as an address, points to a list of values that | |
38 use it as an address in a MEM. */ | |
39 struct elt_list *addr_list; | |
40 | |
41 struct cselib_val_struct *next_containing_mem; | |
42 } cselib_val; | |
43 | |
44 /* A list of rtl expressions that hold the same value. */ | |
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45 struct elt_loc_list { |
0 | 46 /* Next element in the list. */ |
47 struct elt_loc_list *next; | |
48 /* An rtl expression that holds the value. */ | |
49 rtx loc; | |
50 /* The insn that made the equivalence. */ | |
51 rtx setting_insn; | |
52 }; | |
53 | |
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54 /* Describe a single set that is part of an insn. */ |
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55 struct cselib_set |
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56 { |
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57 rtx src; |
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58 rtx dest; |
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59 cselib_val *src_elt; |
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60 cselib_val *dest_addr_elt; |
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61 }; |
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62 |
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63 enum cselib_record_what |
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64 { |
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65 CSELIB_RECORD_MEMORY = 1, |
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66 CSELIB_PRESERVE_CONSTANTS = 2 |
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67 }; |
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68 |
0 | 69 extern void (*cselib_discard_hook) (cselib_val *); |
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70 extern void (*cselib_record_sets_hook) (rtx insn, struct cselib_set *sets, |
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71 int n_sets); |
0 | 72 |
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73 extern cselib_val *cselib_lookup (rtx, enum machine_mode, |
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74 int, enum machine_mode); |
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75 extern cselib_val *cselib_lookup_from_insn (rtx, enum machine_mode, |
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76 int, enum machine_mode, rtx); |
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77 extern void cselib_init (int); |
0 | 78 extern void cselib_clear_table (void); |
79 extern void cselib_finish (void); | |
80 extern void cselib_process_insn (rtx); | |
81 extern enum machine_mode cselib_reg_set_mode (const_rtx); | |
82 extern int rtx_equal_for_cselib_p (rtx, rtx); | |
83 extern int references_value_p (const_rtx, int); | |
84 extern rtx cselib_expand_value_rtx (rtx, bitmap, int); | |
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85 typedef rtx (*cselib_expand_callback)(rtx, bitmap, int, void *); |
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86 extern rtx cselib_expand_value_rtx_cb (rtx, bitmap, int, |
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87 cselib_expand_callback, void *); |
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88 extern bool cselib_dummy_expand_value_rtx_cb (rtx, bitmap, int, |
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89 cselib_expand_callback, void *); |
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90 extern rtx cselib_subst_to_values (rtx, enum machine_mode); |
0 | 91 extern void cselib_invalidate_rtx (rtx); |
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92 |
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93 extern void cselib_reset_table (unsigned int); |
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94 extern unsigned int cselib_get_next_uid (void); |
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95 extern void cselib_preserve_value (cselib_val *); |
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96 extern bool cselib_preserved_value_p (cselib_val *); |
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97 extern void cselib_preserve_only_values (void); |
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98 extern void cselib_preserve_cfa_base_value (cselib_val *, unsigned int); |
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99 |
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100 extern void dump_cselib_table (FILE *); |