|
111
|
1 /* Print RTL for GCC.
|
|
145
|
2 Copyright (C) 1987-2020 Free Software Foundation, Inc.
|
|
111
|
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 GCC_PRINT_RTL_H
|
|
|
21 #define GCC_PRINT_RTL_H
|
|
|
22
|
|
|
23 #ifndef GENERATOR_FILE
|
|
|
24 #include "bitmap.h"
|
|
|
25 #endif /* #ifndef GENERATOR_FILE */
|
|
|
26
|
|
|
27 class rtx_reuse_manager;
|
|
|
28
|
|
|
29 /* A class for writing rtx to a FILE *. */
|
|
|
30
|
|
|
31 class rtx_writer
|
|
|
32 {
|
|
|
33 public:
|
|
|
34 rtx_writer (FILE *outfile, int ind, bool simple, bool compact,
|
|
|
35 rtx_reuse_manager *reuse_manager);
|
|
|
36
|
|
|
37 void print_rtx (const_rtx in_rtx);
|
|
|
38 void print_rtl (const_rtx rtx_first);
|
|
|
39 int print_rtl_single_with_indent (const_rtx x, int ind);
|
|
|
40
|
|
|
41 void finish_directive ();
|
|
|
42
|
|
|
43 private:
|
|
|
44 void print_rtx_operand_code_0 (const_rtx in_rtx, int idx);
|
|
|
45 void print_rtx_operand_code_e (const_rtx in_rtx, int idx);
|
|
|
46 void print_rtx_operand_codes_E_and_V (const_rtx in_rtx, int idx);
|
|
|
47 void print_rtx_operand_code_i (const_rtx in_rtx, int idx);
|
|
|
48 void print_rtx_operand_code_r (const_rtx in_rtx);
|
|
|
49 void print_rtx_operand_code_u (const_rtx in_rtx, int idx);
|
|
|
50 void print_rtx_operand (const_rtx in_rtx, int idx);
|
|
|
51 bool operand_has_default_value_p (const_rtx in_rtx, int idx);
|
|
|
52
|
|
|
53 private:
|
|
|
54 FILE *m_outfile;
|
|
|
55 int m_sawclose;
|
|
|
56 int m_indent;
|
|
|
57 bool m_in_call_function_usage;
|
|
|
58
|
|
|
59 /* True means use simplified format without flags, modes, etc. */
|
|
|
60 bool m_simple;
|
|
|
61
|
|
|
62 /* If true, use compact dump format:
|
|
|
63 - PREV/NEXT_INSN UIDs are omitted
|
|
|
64 - INSN_CODEs are omitted,
|
|
|
65 - register numbers are omitted for hard and virtual regs, and
|
|
|
66 non-virtual pseudos are offset relative to the first such reg, and
|
|
|
67 printed with a '%' sigil e.g. "%0" for (LAST_VIRTUAL_REGISTER + 1),
|
|
|
68 - insn names are prefixed with "c" (e.g. "cinsn", "cnote", etc). */
|
|
|
69 bool m_compact;
|
|
|
70
|
|
|
71 /* An optional instance of rtx_reuse_manager. */
|
|
|
72 rtx_reuse_manager *m_rtx_reuse_manager;
|
|
|
73 };
|
|
|
74
|
|
|
75 #ifdef BUFSIZ
|
|
|
76 extern void print_rtl (FILE *, const_rtx);
|
|
|
77 #endif
|
|
|
78 extern void print_rtx_insn_vec (FILE *file, const vec<rtx_insn *> &vec);
|
|
|
79
|
|
|
80 extern void dump_value_slim (FILE *, const_rtx, int);
|
|
|
81 extern void dump_insn_slim (FILE *, const rtx_insn *);
|
|
|
82 extern void dump_rtl_slim (FILE *, const rtx_insn *, const rtx_insn *,
|
|
|
83 int, int);
|
|
|
84 extern void print_value (pretty_printer *, const_rtx, int);
|
|
|
85 extern void print_pattern (pretty_printer *, const_rtx, int);
|
|
|
86 extern void print_insn (pretty_printer *pp, const rtx_insn *x, int verbose);
|
|
|
87
|
|
|
88 extern void rtl_dump_bb_for_graph (pretty_printer *, basic_block);
|
|
|
89 extern const char *str_pattern_slim (const_rtx);
|
|
|
90
|
|
|
91 extern void print_rtx_function (FILE *file, function *fn, bool compact);
|
|
|
92
|
|
|
93 #ifndef GENERATOR_FILE
|
|
|
94
|
|
|
95 /* For some rtx codes (such as SCRATCH), instances are defined to only be
|
|
|
96 equal for pointer equality: two distinct SCRATCH instances are non-equal.
|
|
|
97 copy_rtx preserves this equality by reusing the SCRATCH instance.
|
|
|
98
|
|
|
99 For example, in this x86 instruction:
|
|
|
100
|
|
|
101 (cinsn (set (mem/v:BLK (scratch:DI) [0 A8])
|
|
|
102 (unspec:BLK [
|
|
|
103 (mem/v:BLK (scratch:DI) [0 A8])
|
|
|
104 ] UNSPEC_MEMORY_BLOCKAGE)) "test.c":2
|
|
|
105 (nil))
|
|
|
106
|
|
|
107 the two instances of "(scratch:DI)" are actually the same underlying
|
|
|
108 rtx pointer (and thus "equal"), and the insn will only be recognized
|
|
|
109 (as "*memory_blockage") if this pointer-equality is preserved.
|
|
|
110
|
|
|
111 To be able to preserve this pointer-equality when round-tripping
|
|
|
112 through dumping/loading the rtl, we need some syntax. The first
|
|
|
113 time a reused rtx is encountered in the dump, we prefix it with
|
|
|
114 a reuse ID:
|
|
|
115
|
|
|
116 (0|scratch:DI)
|
|
|
117
|
|
|
118 Subsequent references to the rtx in the dump can be expressed using
|
|
|
119 "reuse_rtx" e.g.:
|
|
|
120
|
|
|
121 (reuse_rtx 0)
|
|
|
122
|
|
|
123 This class is responsible for tracking a set of reuse IDs during a dump.
|
|
|
124
|
|
|
125 Dumping with reuse-support is done in two passes:
|
|
|
126
|
|
|
127 (a) a first pass in which "preprocess" is called on each top-level rtx
|
|
|
128 to be seen in the dump. This traverses the rtx and its descendents,
|
|
|
129 identifying rtx that will be seen more than once in the actual dump,
|
|
|
130 and assigning them reuse IDs.
|
|
|
131
|
|
|
132 (b) the actual dump, via print_rtx etc. print_rtx detect the presence
|
|
|
133 of a live rtx_reuse_manager and uses it if there is one. Any rtx
|
|
|
134 that were assigned reuse IDs will be printed with it the first time
|
|
|
135 that they are seen, and then printed as "(reuse_rtx ID)" subsequently.
|
|
|
136
|
|
|
137 The first phase is needed since otherwise there would be no way to tell
|
|
|
138 if an rtx will be reused when first encountering it. */
|
|
|
139
|
|
|
140 class rtx_reuse_manager
|
|
|
141 {
|
|
|
142 public:
|
|
|
143 rtx_reuse_manager ();
|
|
|
144
|
|
|
145 /* The first pass. */
|
|
|
146 void preprocess (const_rtx x);
|
|
|
147
|
|
|
148 /* The second pass (within print_rtx). */
|
|
|
149 bool has_reuse_id (const_rtx x, int *out);
|
|
|
150 bool seen_def_p (int reuse_id);
|
|
|
151 void set_seen_def (int reuse_id);
|
|
|
152
|
|
|
153 private:
|
|
|
154 hash_map<const_rtx, int> m_rtx_occurrence_count;
|
|
|
155 hash_map<const_rtx, int> m_rtx_reuse_ids;
|
|
|
156 auto_bitmap m_defs_seen;
|
|
|
157 int m_next_id;
|
|
|
158 };
|
|
|
159
|
|
|
160 #endif /* #ifndef GENERATOR_FILE */
|
|
|
161
|
|
|
162 #endif // GCC_PRINT_RTL_H
|
