summaryrefslogtreecommitdiff
path: root/gcc/rtl-tests.c
blob: 705434012d6be41b4877f150a6aceb06046afe75 (plain)
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
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
/* Unit tests for RTL-handling.
   Copyright (C) 2015-2017 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 "opts.h"
#include "signop.h"
#include "hash-set.h"
#include "fixed-value.h"
#include "alias.h"
#include "flags.h"
#include "symtab.h"
#include "tree-core.h"
#include "stor-layout.h"
#include "tree.h"
#include "stringpool.h"
#include "stor-layout.h"
#include "rtl.h"
#include "pretty-print.h"
#include "cfgbuild.h"
#include "print-rtl.h"
#include "selftest.h"
#include "selftest-rtl.h"
#include "function.h"
#include "memmodel.h"
#include "emit-rtl.h"

#if CHECKING_P

namespace selftest {

/* Verify that PAT is printed as EXPECTED.  Helper function for
   selftests.  */

static void
verify_print_pattern (const char *expected, rtx pat)
{
  pretty_printer pp;
  print_pattern (&pp, pat, 1);
  ASSERT_STREQ (expected, pp_formatted_text (&pp));
}

/* Verify that X is dumped as EXPECTED_DUMP, using compact mode.
   Use LOC as the effective location when reporting errors.  */

void
assert_rtl_dump_eq (const location &loc, const char *expected_dump, rtx x,
		    rtx_reuse_manager *reuse_manager)
{
  named_temp_file tmp_out (".rtl");
  FILE *outfile = fopen (tmp_out.get_filename (), "w");
  rtx_writer w (outfile, 0, false, true, reuse_manager);
  w.print_rtl (x);
  fclose (outfile);

  char *dump = read_file (SELFTEST_LOCATION, tmp_out.get_filename ());
  ASSERT_STREQ_AT (loc, expected_dump, dump);
  free (dump);
}

/* Verify that regs are dumped as expected (in compact mode).  */

static void
test_dumping_regs ()
{
  /* Dumps of hard regs contain a target-specific name, so we don't test
     it here; this can be tested in target-specific selftests.  */

  /* Test dumping of virtual regs.  The various virtual regs are inited as
     Pmode, so this is target-specific.  The tests below assume DImode, so
     only run the tests for targets where Pmode is DImode.  */
  if (Pmode == DImode)
    {
      ASSERT_RTL_DUMP_EQ ("(reg:DI virtual-incoming-args)",
			  virtual_incoming_args_rtx);
      ASSERT_RTL_DUMP_EQ ("(reg:DI virtual-stack-vars)",
			  virtual_stack_vars_rtx);
      ASSERT_RTL_DUMP_EQ ("(reg:DI virtual-stack-dynamic)",
			  virtual_stack_dynamic_rtx);
      ASSERT_RTL_DUMP_EQ ("(reg:DI virtual-outgoing-args)",
			  virtual_outgoing_args_rtx);
      ASSERT_RTL_DUMP_EQ ("(reg:DI virtual-cfa)",
			  virtual_cfa_rtx);
      ASSERT_RTL_DUMP_EQ ("(reg:DI virtual-preferred-stack-boundary)",
			  virtual_preferred_stack_boundary_rtx);
    }

  /* Test dumping of non-virtual pseudos.  */
  ASSERT_RTL_DUMP_EQ ("(reg:SI <0>)",
    gen_raw_REG (SImode, LAST_VIRTUAL_REGISTER + 1));
  ASSERT_RTL_DUMP_EQ ("(reg:SI <1>)",
    gen_raw_REG (SImode, LAST_VIRTUAL_REGISTER + 2));
}

/* Verify that insns are dumped as expected (in compact mode).  */

static void
test_dumping_insns ()
{
  /* Barriers.  */
  rtx_barrier *barrier = as_a <rtx_barrier *> (rtx_alloc (BARRIER));
  SET_NEXT_INSN (barrier) = NULL;
  ASSERT_RTL_DUMP_EQ ("(cbarrier 0)\n", barrier);

  /* Labels.  */
  rtx_insn *label = gen_label_rtx ();
  CODE_LABEL_NUMBER (label) = 42;
  ASSERT_RTL_DUMP_EQ ("(clabel 0 42)\n", label);

  LABEL_NAME (label)= "some_label";
  ASSERT_RTL_DUMP_EQ ("(clabel 0 42 (\"some_label\"))\n", label);
}

/* Manually exercise the rtx_reuse_manager code.  */

static void
test_dumping_rtx_reuse ()
{
  rtx_reuse_manager r;

  rtx x = rtx_alloc (SCRATCH);
  rtx y = rtx_alloc (SCRATCH);
  rtx z = rtx_alloc (SCRATCH);

  /* x and y will be seen more than once.  */
  r.preprocess (x);
  r.preprocess (x);
  r.preprocess (y);
  r.preprocess (y);

  /* z will be only seen once.  */
  r.preprocess (z);

  /* Verify that x and y have been assigned reuse IDs.  */
  int reuse_id_for_x;
  ASSERT_TRUE (r.has_reuse_id (x, &reuse_id_for_x));
  ASSERT_EQ (0, reuse_id_for_x);

  int reuse_id_for_y;
  ASSERT_TRUE (r.has_reuse_id (y, &reuse_id_for_y));
  ASSERT_EQ (1, reuse_id_for_y);

  /* z is only seen once and thus shouldn't get a reuse ID.  */
  ASSERT_FALSE (r.has_reuse_id (z, NULL));

  /* The first dumps of x and y should be prefixed by reuse ID;
     all subsequent dumps of them should show up as "reuse_rtx".  */
  ASSERT_RTL_DUMP_EQ_WITH_REUSE ("(0|scratch)", x, &r);
  ASSERT_RTL_DUMP_EQ_WITH_REUSE ("(reuse_rtx 0)", x, &r);
  ASSERT_RTL_DUMP_EQ_WITH_REUSE ("(reuse_rtx 0)", x, &r);

  ASSERT_RTL_DUMP_EQ_WITH_REUSE ("(1|scratch)", y, &r);
  ASSERT_RTL_DUMP_EQ_WITH_REUSE ("(reuse_rtx 1)", y, &r);
  ASSERT_RTL_DUMP_EQ_WITH_REUSE ("(reuse_rtx 1)", y, &r);

  /* z only appears once and thus shouldn't be prefixed with a
     reuse ID.  */
  ASSERT_RTL_DUMP_EQ_WITH_REUSE ("(scratch)", z, &r);
}

/* Unit testing of "single_set".  */

static void
test_single_set ()
{
  /* A label is not a SET.  */
  ASSERT_EQ (NULL_RTX, single_set (gen_label_rtx ()));

  /* An unconditional jump insn is a single SET.  */
  rtx set_pc = gen_rtx_SET (pc_rtx,
			    gen_rtx_LABEL_REF (VOIDmode,
					       gen_label_rtx ()));
  rtx_insn *jump_insn = emit_jump_insn (set_pc);
  ASSERT_EQ (set_pc, single_set (jump_insn));

  /* etc */
}

/* Construct an unconditional jump to a label, and verify that
   various properties of it are sane.  */

static void
test_uncond_jump ()
{
  set_new_first_and_last_insn (NULL, NULL);
  rtx_insn *label = gen_label_rtx ();
  rtx jump_pat = gen_rtx_SET (pc_rtx,
			      gen_rtx_LABEL_REF (VOIDmode,
						 label));
  ASSERT_EQ (SET, jump_pat->code);
  ASSERT_EQ (LABEL_REF, SET_SRC (jump_pat)->code);
  ASSERT_EQ (label, label_ref_label (SET_SRC (jump_pat)));
  ASSERT_EQ (PC, SET_DEST (jump_pat)->code);

  verify_print_pattern ("pc=L0", jump_pat);

  ASSERT_RTL_DUMP_EQ ("(set (pc)\n"
		      "    (label_ref 0))",
		      jump_pat);

  rtx_insn *jump_insn = emit_jump_insn (jump_pat);
  ASSERT_FALSE (any_condjump_p (jump_insn));
  ASSERT_TRUE (any_uncondjump_p (jump_insn));
  ASSERT_TRUE (pc_set (jump_insn));
  ASSERT_TRUE (simplejump_p (jump_insn));
  ASSERT_TRUE (onlyjump_p (jump_insn));
  ASSERT_TRUE (control_flow_insn_p (jump_insn));

  ASSERT_RTL_DUMP_EQ ("(cjump_insn 1 (set (pc)\n"
		      "        (label_ref 0)))\n",
		      jump_insn);
}

/* Run all of the selftests within this file.  */

void
rtl_tests_c_tests ()
{
  test_dumping_regs ();
  test_dumping_insns ();
  test_dumping_rtx_reuse ();
  test_single_set ();
  test_uncond_jump ();

  /* Purge state.  */
  set_first_insn (NULL);
  set_last_insn (NULL);
}

} // namespace selftest
#endif /* #if CHECKING_P */