1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
|
/* Print RTL functions for GCC.
Copyright (C) 2016 Free Software Foundation, Inc.
This file is part of GCC.
GCC is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
Software Foundation; either version 3, or (at your option) any later
version.
GCC is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
You should have received a copy of the GNU General Public License
along with GCC; see the file COPYING3. If not see
<http://www.gnu.org/licenses/>. */
#include "config.h"
#include "system.h"
#include "coretypes.h"
#include "tm.h"
#include "rtl.h"
#include "alias.h"
#include "tree.h"
#include "cfg.h"
#include "flags.h"
#include "predict.h"
#include "function.h"
#include "basic-block.h"
#include "print-rtl.h"
#include "langhooks.h"
#include "memmodel.h"
#include "emit-rtl.h"
/* Print an "(edge-from)" or "(edge-to)" directive describing E
to OUTFILE. */
static void
print_edge (FILE *outfile, edge e, bool from)
{
fprintf (outfile, " (%s ", from ? "edge-from" : "edge-to");
basic_block bb = from ? e->src : e->dest;
gcc_assert (bb);
switch (bb->index)
{
case ENTRY_BLOCK:
fprintf (outfile, "entry");
break;
case EXIT_BLOCK:
fprintf (outfile, "exit");
break;
default:
fprintf (outfile, "%i", bb->index);
break;
}
/* Express edge flags as a string with " | " separator.
e.g. (flags "FALLTHRU | DFS_BACK"). */
if (e->flags)
{
fprintf (outfile, " (flags \"");
bool seen_flag = false;
#define DEF_EDGE_FLAG(NAME,IDX) \
do { \
if (e->flags & EDGE_##NAME) \
{ \
if (seen_flag) \
fprintf (outfile, " | "); \
fprintf (outfile, "%s", (#NAME)); \
seen_flag = true; \
} \
} while (0);
#include "cfg-flags.def"
#undef DEF_EDGE_FLAG
fprintf (outfile, "\")");
}
fprintf (outfile, ")\n");
}
/* If BB is non-NULL, print the start of a "(block)" directive for it
to OUTFILE, otherwise do nothing. */
static void
begin_any_block (FILE *outfile, basic_block bb)
{
if (!bb)
return;
edge e;
edge_iterator ei;
fprintf (outfile, " (block %i\n", bb->index);
FOR_EACH_EDGE (e, ei, bb->preds)
print_edge (outfile, e, true);
}
/* If BB is non-NULL, print the end of a "(block)" directive for it
to OUTFILE, otherwise do nothing. */
static void
end_any_block (FILE *outfile, basic_block bb)
{
if (!bb)
return;
edge e;
edge_iterator ei;
FOR_EACH_EDGE (e, ei, bb->succs)
print_edge (outfile, e, false);
fprintf (outfile, " ) ;; block %i\n", bb->index);
}
/* Determine if INSN is of a kind that can have a basic block. */
static bool
can_have_basic_block_p (const rtx_insn *insn)
{
rtx_code code = GET_CODE (insn);
if (code == BARRIER)
return false;
gcc_assert (GET_RTX_FORMAT (code)[2] == 'B');
return true;
}
/* Write FN to OUTFILE in a form suitable for parsing, with indentation
and comments to make the structure easy for a human to grok. Track
the basic blocks of insns in the chain, wrapping those that are within
blocks within "(block)" directives.
If COMPACT, then instructions are printed in a compact form:
- INSN_UIDs are omitted, except for jumps and CODE_LABELs,
- INSN_CODEs are omitted,
- register numbers are omitted for hard and virtual regs, and
non-virtual pseudos are offset relative to the first such reg, and
printed with a '%' sigil e.g. "%0" for (LAST_VIRTUAL_REGISTER + 1),
- insn names are prefixed with "c" (e.g. "cinsn", "cnote", etc)
Example output (with COMPACT==true):
(function "times_two"
(insn-chain
(cnote NOTE_INSN_DELETED)
(block 2
(edge-from entry (flags "FALLTHRU"))
(cnote [bb 2] NOTE_INSN_BASIC_BLOCK)
(cinsn (set (mem/c:SI (plus:DI (reg/f:DI virtual-stack-vars)
(const_int -4)) [1 i+0 S4 A32])
(reg:SI di [ i ])) "t.c":2
(nil))
(cnote NOTE_INSN_FUNCTION_BEG)
(cinsn (set (reg:SI %2)
(mem/c:SI (plus:DI (reg/f:DI virtual-stack-vars)
(const_int -4)) [1 i+0 S4 A32])) "t.c":3
(nil))
(cinsn (parallel [
(set (reg:SI %0 [ _2 ])
(ashift:SI (reg:SI %2)
(const_int 1)))
(clobber (reg:CC flags))
]) "t.c":3
(expr_list:REG_EQUAL (ashift:SI (mem/c:SI (plus:DI (reg/f:DI virtual-stack-vars)
(const_int -4)) [1 i+0 S4 A32])
(const_int 1))
(nil)))
(cinsn (set (reg:SI %1 [ <retval> ])
(reg:SI %0 [ _2 ])) "t.c":3
(nil))
(cinsn (set (reg/i:SI ax)
(reg:SI %1 [ <retval> ])) "t.c":4
(nil))
(cinsn (use (reg/i:SI ax)) "t.c":4
(nil))
(edge-to exit (flags "FALLTHRU"))
) ;; block 2
) ;; insn-chain
(crtl
(return_rtx
(reg/i:SI ax)
) ;; return_rtx
) ;; crtl
) ;; function "times_two"
*/
DEBUG_FUNCTION void
print_rtx_function (FILE *outfile, function *fn, bool compact)
{
rtx_writer w (outfile, 0, false, compact);
tree fdecl = fn->decl;
const char *dname = lang_hooks.decl_printable_name (fdecl, 2);
fprintf (outfile, "(function \"%s\"\n", dname);
/* The instruction chain. */
fprintf (outfile, " (insn-chain\n");
basic_block curr_bb = NULL;
for (rtx_insn *insn = get_insns (); insn; insn = NEXT_INSN (insn))
{
basic_block insn_bb;
if (can_have_basic_block_p (insn))
insn_bb = BLOCK_FOR_INSN (insn);
else
insn_bb = NULL;
if (curr_bb != insn_bb)
{
end_any_block (outfile, curr_bb);
curr_bb = insn_bb;
begin_any_block (outfile, curr_bb);
}
w.print_rtl_single_with_indent (insn, curr_bb ? 6 : 4);
}
end_any_block (outfile, curr_bb);
fprintf (outfile, " ) ;; insn-chain\n");
/* Additional RTL state. */
fprintf (outfile, " (crtl\n");
fprintf (outfile, " (return_rtx \n");
w.print_rtl_single_with_indent (crtl->return_rtx, 6);
fprintf (outfile, " ) ;; return_rtx\n");
fprintf (outfile, " ) ;; crtl\n");
fprintf (outfile, ") ;; function \"%s\"\n", dname);
}
|
