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comparison gcc/cselib.h @ 111:04ced10e8804

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gcc 7
author kono
date Fri, 27 Oct 2017 22:46:09 +0900
parents f6334be47118
children 84e7813d76e9
comparison
equal deleted inserted replaced
68:561a7518be6b 111:04ced10e8804
1 /* Common subexpression elimination for GNU compiler. 1 /* Common subexpression elimination for GNU compiler.
2 Copyright (C) 1987, 1988, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 2 Copyright (C) 1987-2017 Free Software Foundation, Inc.
3 1998, 1999, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010
4 Free Software Foundation, Inc.
5 3
6 This file is part of GCC. 4 This file is part of GCC.
7 5
8 GCC is free software; you can redistribute it and/or modify it under 6 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 7 the terms of the GNU General Public License as published by the Free
17 15
18 You should have received a copy of the GNU General Public License 16 You should have received a copy of the GNU General Public License
19 along with GCC; see the file COPYING3. If not see 17 along with GCC; see the file COPYING3. If not see
20 <http://www.gnu.org/licenses/>. */ 18 <http://www.gnu.org/licenses/>. */
21 19
20 #ifndef GCC_CSELIB_H
21 #define GCC_CSELIB_H
22
22 /* Describe a value. */ 23 /* Describe a value. */
23 typedef struct cselib_val_struct { 24 struct cselib_val
25 {
24 /* The hash value. */ 26 /* The hash value. */
25 unsigned int hash; 27 unsigned int hash;
26 28
27 /* A unique id assigned to values. */ 29 /* A unique id assigned to values. */
28 int uid; 30 int uid;
36 38
37 /* If this value is used as an address, points to a list of values that 39 /* If this value is used as an address, points to a list of values that
38 use it as an address in a MEM. */ 40 use it as an address in a MEM. */
39 struct elt_list *addr_list; 41 struct elt_list *addr_list;
40 42
41 struct cselib_val_struct *next_containing_mem; 43 struct cselib_val *next_containing_mem;
42 } cselib_val; 44 };
43 45
44 /* A list of rtl expressions that hold the same value. */ 46 /* A list of rtl expressions that hold the same value. */
45 struct elt_loc_list { 47 struct elt_loc_list {
46 /* Next element in the list. */ 48 /* Next element in the list. */
47 struct elt_loc_list *next; 49 struct elt_loc_list *next;
48 /* An rtl expression that holds the value. */ 50 /* An rtl expression that holds the value. */
49 rtx loc; 51 rtx loc;
50 /* The insn that made the equivalence. */ 52 /* The insn that made the equivalence. */
51 rtx setting_insn; 53 rtx_insn *setting_insn;
52 }; 54 };
53 55
54 /* Describe a single set that is part of an insn. */ 56 /* Describe a single set that is part of an insn. */
55 struct cselib_set 57 struct cselib_set
56 { 58 {
65 CSELIB_RECORD_MEMORY = 1, 67 CSELIB_RECORD_MEMORY = 1,
66 CSELIB_PRESERVE_CONSTANTS = 2 68 CSELIB_PRESERVE_CONSTANTS = 2
67 }; 69 };
68 70
69 extern void (*cselib_discard_hook) (cselib_val *); 71 extern void (*cselib_discard_hook) (cselib_val *);
70 extern void (*cselib_record_sets_hook) (rtx insn, struct cselib_set *sets, 72 extern void (*cselib_record_sets_hook) (rtx_insn *insn, struct cselib_set *sets,
71 int n_sets); 73 int n_sets);
72 74
73 extern cselib_val *cselib_lookup (rtx, enum machine_mode, 75 extern cselib_val *cselib_lookup (rtx, machine_mode,
74 int, enum machine_mode); 76 int, machine_mode);
75 extern cselib_val *cselib_lookup_from_insn (rtx, enum machine_mode, 77 extern cselib_val *cselib_lookup_from_insn (rtx, machine_mode,
76 int, enum machine_mode, rtx); 78 int, machine_mode, rtx_insn *);
77 extern void cselib_init (int); 79 extern void cselib_init (int);
78 extern void cselib_clear_table (void); 80 extern void cselib_clear_table (void);
79 extern void cselib_finish (void); 81 extern void cselib_finish (void);
80 extern void cselib_process_insn (rtx); 82 extern void cselib_process_insn (rtx_insn *);
81 extern enum machine_mode cselib_reg_set_mode (const_rtx); 83 extern bool fp_setter_insn (rtx_insn *);
82 extern int rtx_equal_for_cselib_p (rtx, rtx); 84 extern machine_mode cselib_reg_set_mode (const_rtx);
85 extern int rtx_equal_for_cselib_1 (rtx, rtx, machine_mode, int);
83 extern int references_value_p (const_rtx, int); 86 extern int references_value_p (const_rtx, int);
84 extern rtx cselib_expand_value_rtx (rtx, bitmap, int); 87 extern rtx cselib_expand_value_rtx (rtx, bitmap, int);
85 typedef rtx (*cselib_expand_callback)(rtx, bitmap, int, void *); 88 typedef rtx (*cselib_expand_callback)(rtx, bitmap, int, void *);
86 extern rtx cselib_expand_value_rtx_cb (rtx, bitmap, int, 89 extern rtx cselib_expand_value_rtx_cb (rtx, bitmap, int,
87 cselib_expand_callback, void *); 90 cselib_expand_callback, void *);
88 extern bool cselib_dummy_expand_value_rtx_cb (rtx, bitmap, int, 91 extern bool cselib_dummy_expand_value_rtx_cb (rtx, bitmap, int,
89 cselib_expand_callback, void *); 92 cselib_expand_callback, void *);
90 extern rtx cselib_subst_to_values (rtx, enum machine_mode); 93 extern rtx cselib_subst_to_values (rtx, machine_mode);
94 extern rtx cselib_subst_to_values_from_insn (rtx, machine_mode, rtx_insn *);
91 extern void cselib_invalidate_rtx (rtx); 95 extern void cselib_invalidate_rtx (rtx);
92 96
93 extern void cselib_reset_table (unsigned int); 97 extern void cselib_reset_table (unsigned int);
94 extern unsigned int cselib_get_next_uid (void); 98 extern unsigned int cselib_get_next_uid (void);
95 extern void cselib_preserve_value (cselib_val *); 99 extern void cselib_preserve_value (cselib_val *);
96 extern bool cselib_preserved_value_p (cselib_val *); 100 extern bool cselib_preserved_value_p (cselib_val *);
97 extern void cselib_preserve_only_values (void); 101 extern void cselib_preserve_only_values (void);
98 extern void cselib_preserve_cfa_base_value (cselib_val *, unsigned int); 102 extern void cselib_preserve_cfa_base_value (cselib_val *, unsigned int);
103 extern void cselib_add_permanent_equiv (cselib_val *, rtx, rtx_insn *);
104 extern bool cselib_have_permanent_equivalences (void);
105 extern void cselib_set_value_sp_based (cselib_val *);
106 extern bool cselib_sp_based_value_p (cselib_val *);
99 107
100 extern void dump_cselib_table (FILE *); 108 extern void dump_cselib_table (FILE *);
109
110 /* Return the canonical value for VAL, following the equivalence chain
111 towards the earliest (== lowest uid) equivalent value. */
112
113 static inline cselib_val *
114 canonical_cselib_val (cselib_val *val)
115 {
116 cselib_val *canon;
117
118 if (!val->locs || val->locs->next
119 || !val->locs->loc || GET_CODE (val->locs->loc) != VALUE
120 || val->uid < CSELIB_VAL_PTR (val->locs->loc)->uid)
121 return val;
122
123 canon = CSELIB_VAL_PTR (val->locs->loc);
124 gcc_checking_assert (canonical_cselib_val (canon) == canon);
125 return canon;
126 }
127
128 /* Return nonzero if we can prove that X and Y contain the same value, taking
129 our gathered information into account. */
130
131 static inline int
132 rtx_equal_for_cselib_p (rtx x, rtx y)
133 {
134 if (x == y)
135 return 1;
136
137 return rtx_equal_for_cselib_1 (x, y, VOIDmode, 0);
138 }
139
140 #endif /* GCC_CSELIB_H */