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[official-gcc.git] / gcc / rtl-tests.c
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1 /* Unit tests for RTL-handling.
2 Copyright (C) 2015-2018 Free Software Foundation, Inc.
4 This file is part of GCC.
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.
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.
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/>. */
20 #include "config.h"
21 #include "system.h"
22 #include "coretypes.h"
23 #include "tm.h"
24 #include "opts.h"
25 #include "hash-set.h"
26 #include "fixed-value.h"
27 #include "alias.h"
28 #include "flags.h"
29 #include "symtab.h"
30 #include "tree-core.h"
31 #include "stor-layout.h"
32 #include "tree.h"
33 #include "stringpool.h"
34 #include "stor-layout.h"
35 #include "rtl.h"
36 #include "pretty-print.h"
37 #include "cfgbuild.h"
38 #include "print-rtl.h"
39 #include "selftest.h"
40 #include "selftest-rtl.h"
41 #include "function.h"
42 #include "memmodel.h"
43 #include "emit-rtl.h"
45 #if CHECKING_P
47 namespace selftest {
49 /* Verify that PAT is printed as EXPECTED. Helper function for
50 selftests. */
52 static void
53 verify_print_pattern (const char *expected, rtx pat)
55 pretty_printer pp;
56 print_pattern (&pp, pat, 1);
57 ASSERT_STREQ (expected, pp_formatted_text (&pp));
60 /* Verify that X is dumped as EXPECTED_DUMP, using compact mode.
61 Use LOC as the effective location when reporting errors. */
63 void
64 assert_rtl_dump_eq (const location &loc, const char *expected_dump, rtx x,
65 rtx_reuse_manager *reuse_manager)
67 named_temp_file tmp_out (".rtl");
68 FILE *outfile = fopen (tmp_out.get_filename (), "w");
69 rtx_writer w (outfile, 0, false, true, reuse_manager);
70 w.print_rtl (x);
71 fclose (outfile);
73 char *dump = read_file (SELFTEST_LOCATION, tmp_out.get_filename ());
74 ASSERT_STREQ_AT (loc, expected_dump, dump);
75 free (dump);
78 /* Verify that regs are dumped as expected (in compact mode). */
80 static void
81 test_dumping_regs ()
83 /* Dumps of hard regs contain a target-specific name, so we don't test
84 it here; this can be tested in target-specific selftests. */
86 /* Test dumping of virtual regs. The various virtual regs are inited as
87 Pmode, so this is target-specific. The tests below assume DImode, so
88 only run the tests for targets where Pmode is DImode. */
89 if (Pmode == DImode)
91 ASSERT_RTL_DUMP_EQ ("(reg:DI virtual-incoming-args)",
92 virtual_incoming_args_rtx);
93 ASSERT_RTL_DUMP_EQ ("(reg:DI virtual-stack-vars)",
94 virtual_stack_vars_rtx);
95 ASSERT_RTL_DUMP_EQ ("(reg:DI virtual-stack-dynamic)",
96 virtual_stack_dynamic_rtx);
97 ASSERT_RTL_DUMP_EQ ("(reg:DI virtual-outgoing-args)",
98 virtual_outgoing_args_rtx);
99 ASSERT_RTL_DUMP_EQ ("(reg:DI virtual-cfa)",
100 virtual_cfa_rtx);
101 ASSERT_RTL_DUMP_EQ ("(reg:DI virtual-preferred-stack-boundary)",
102 virtual_preferred_stack_boundary_rtx);
105 /* Test dumping of non-virtual pseudos. */
106 ASSERT_RTL_DUMP_EQ ("(reg:SI <0>)",
107 gen_raw_REG (SImode, LAST_VIRTUAL_REGISTER + 1));
108 ASSERT_RTL_DUMP_EQ ("(reg:SI <1>)",
109 gen_raw_REG (SImode, LAST_VIRTUAL_REGISTER + 2));
112 /* Verify that insns are dumped as expected (in compact mode). */
114 static void
115 test_dumping_insns ()
117 /* Barriers. */
118 rtx_barrier *barrier = as_a <rtx_barrier *> (rtx_alloc (BARRIER));
119 SET_NEXT_INSN (barrier) = NULL;
120 ASSERT_RTL_DUMP_EQ ("(cbarrier 0)\n", barrier);
122 /* Labels. */
123 rtx_insn *label = gen_label_rtx ();
124 CODE_LABEL_NUMBER (label) = 42;
125 ASSERT_RTL_DUMP_EQ ("(clabel 0 42)\n", label);
127 LABEL_NAME (label)= "some_label";
128 ASSERT_RTL_DUMP_EQ ("(clabel 0 42 (\"some_label\"))\n", label);
131 /* Manually exercise the rtx_reuse_manager code. */
133 static void
134 test_dumping_rtx_reuse ()
136 rtx_reuse_manager r;
138 rtx x = rtx_alloc (SCRATCH);
139 rtx y = rtx_alloc (SCRATCH);
140 rtx z = rtx_alloc (SCRATCH);
142 /* x and y will be seen more than once. */
143 r.preprocess (x);
144 r.preprocess (x);
145 r.preprocess (y);
146 r.preprocess (y);
148 /* z will be only seen once. */
149 r.preprocess (z);
151 /* Verify that x and y have been assigned reuse IDs. */
152 int reuse_id_for_x;
153 ASSERT_TRUE (r.has_reuse_id (x, &reuse_id_for_x));
154 ASSERT_EQ (0, reuse_id_for_x);
156 int reuse_id_for_y;
157 ASSERT_TRUE (r.has_reuse_id (y, &reuse_id_for_y));
158 ASSERT_EQ (1, reuse_id_for_y);
160 /* z is only seen once and thus shouldn't get a reuse ID. */
161 ASSERT_FALSE (r.has_reuse_id (z, NULL));
163 /* The first dumps of x and y should be prefixed by reuse ID;
164 all subsequent dumps of them should show up as "reuse_rtx". */
165 ASSERT_RTL_DUMP_EQ_WITH_REUSE ("(0|scratch)", x, &r);
166 ASSERT_RTL_DUMP_EQ_WITH_REUSE ("(reuse_rtx 0)", x, &r);
167 ASSERT_RTL_DUMP_EQ_WITH_REUSE ("(reuse_rtx 0)", x, &r);
169 ASSERT_RTL_DUMP_EQ_WITH_REUSE ("(1|scratch)", y, &r);
170 ASSERT_RTL_DUMP_EQ_WITH_REUSE ("(reuse_rtx 1)", y, &r);
171 ASSERT_RTL_DUMP_EQ_WITH_REUSE ("(reuse_rtx 1)", y, &r);
173 /* z only appears once and thus shouldn't be prefixed with a
174 reuse ID. */
175 ASSERT_RTL_DUMP_EQ_WITH_REUSE ("(scratch)", z, &r);
178 /* Unit testing of "single_set". */
180 static void
181 test_single_set ()
183 /* A label is not a SET. */
184 ASSERT_EQ (NULL_RTX, single_set (gen_label_rtx ()));
186 /* An unconditional jump insn is a single SET. */
187 rtx set_pc = gen_rtx_SET (pc_rtx,
188 gen_rtx_LABEL_REF (VOIDmode,
189 gen_label_rtx ()));
190 rtx_insn *jump_insn = emit_jump_insn (set_pc);
191 ASSERT_EQ (set_pc, single_set (jump_insn));
193 /* etc */
196 /* Construct an unconditional jump to a label, and verify that
197 various properties of it are sane. */
199 static void
200 test_uncond_jump ()
202 set_new_first_and_last_insn (NULL, NULL);
203 rtx_insn *label = gen_label_rtx ();
204 rtx jump_pat = gen_rtx_SET (pc_rtx,
205 gen_rtx_LABEL_REF (VOIDmode,
206 label));
207 ASSERT_EQ (SET, jump_pat->code);
208 ASSERT_EQ (LABEL_REF, SET_SRC (jump_pat)->code);
209 ASSERT_EQ (label, label_ref_label (SET_SRC (jump_pat)));
210 ASSERT_EQ (PC, SET_DEST (jump_pat)->code);
212 verify_print_pattern ("pc=L0", jump_pat);
214 ASSERT_RTL_DUMP_EQ ("(set (pc)\n"
215 " (label_ref 0))",
216 jump_pat);
218 rtx_insn *jump_insn = emit_jump_insn (jump_pat);
219 ASSERT_FALSE (any_condjump_p (jump_insn));
220 ASSERT_TRUE (any_uncondjump_p (jump_insn));
221 ASSERT_TRUE (pc_set (jump_insn));
222 ASSERT_TRUE (simplejump_p (jump_insn));
223 ASSERT_TRUE (onlyjump_p (jump_insn));
224 ASSERT_TRUE (control_flow_insn_p (jump_insn));
226 ASSERT_RTL_DUMP_EQ ("(cjump_insn 1 (set (pc)\n"
227 " (label_ref 0)))\n",
228 jump_insn);
231 template<unsigned int N>
232 struct const_poly_int_tests
234 static void run ();
237 template<>
238 struct const_poly_int_tests<1>
240 static void run () {}
243 /* Test various CONST_POLY_INT properties. */
245 template<unsigned int N>
246 void
247 const_poly_int_tests<N>::run ()
249 rtx x1 = gen_int_mode (poly_int64 (1, 1), QImode);
250 rtx x255 = gen_int_mode (poly_int64 (1, 255), QImode);
252 /* Test that constants are unique. */
253 ASSERT_EQ (x1, gen_int_mode (poly_int64 (1, 1), QImode));
254 ASSERT_NE (x1, gen_int_mode (poly_int64 (1, 1), HImode));
255 ASSERT_NE (x1, x255);
257 /* Test const_poly_int_value. */
258 ASSERT_KNOWN_EQ (const_poly_int_value (x1), poly_int64 (1, 1));
259 ASSERT_KNOWN_EQ (const_poly_int_value (x255), poly_int64 (1, -1));
261 /* Test rtx_to_poly_int64. */
262 ASSERT_KNOWN_EQ (rtx_to_poly_int64 (x1), poly_int64 (1, 1));
263 ASSERT_KNOWN_EQ (rtx_to_poly_int64 (x255), poly_int64 (1, -1));
264 ASSERT_MAYBE_NE (rtx_to_poly_int64 (x255), poly_int64 (1, 255));
266 /* Test plus_constant of a symbol. */
267 rtx symbol = gen_rtx_SYMBOL_REF (Pmode, "foo");
268 rtx offset1 = gen_int_mode (poly_int64 (9, 11), Pmode);
269 rtx sum1 = gen_rtx_CONST (Pmode, gen_rtx_PLUS (Pmode, symbol, offset1));
270 ASSERT_RTX_EQ (plus_constant (Pmode, symbol, poly_int64 (9, 11)), sum1);
272 /* Test plus_constant of a CONST. */
273 rtx offset2 = gen_int_mode (poly_int64 (12, 20), Pmode);
274 rtx sum2 = gen_rtx_CONST (Pmode, gen_rtx_PLUS (Pmode, symbol, offset2));
275 ASSERT_RTX_EQ (plus_constant (Pmode, sum1, poly_int64 (3, 9)), sum2);
277 /* Test a cancelling plus_constant. */
278 ASSERT_EQ (plus_constant (Pmode, sum2, poly_int64 (-12, -20)), symbol);
280 /* Test plus_constant on integer constants. */
281 ASSERT_EQ (plus_constant (QImode, const1_rtx, poly_int64 (4, -2)),
282 gen_int_mode (poly_int64 (5, -2), QImode));
283 ASSERT_EQ (plus_constant (QImode, x1, poly_int64 (4, -2)),
284 gen_int_mode (poly_int64 (5, -1), QImode));
287 /* Run all of the selftests within this file. */
289 void
290 rtl_tests_c_tests ()
292 test_dumping_regs ();
293 test_dumping_insns ();
294 test_dumping_rtx_reuse ();
295 test_single_set ();
296 test_uncond_jump ();
297 const_poly_int_tests<NUM_POLY_INT_COEFFS>::run ();
299 /* Purge state. */
300 set_first_insn (NULL);
301 set_last_insn (NULL);
304 } // namespace selftest
305 #endif /* #if CHECKING_P */