[thirdparty/gcc.git] / gcc / rtl-tests.c

/* Unit tests for RTL-handling.
   Copyright (C) 2015-2020 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 "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);
}

template<unsigned int N>
struct const_poly_int_tests
{
  static void run ();
};

template<>
struct const_poly_int_tests<1>
{
  static void run () {}
};

/* Test various CONST_POLY_INT properties.  */

template<unsigned int N>
void
const_poly_int_tests<N>::run ()
{
  rtx x1 = gen_int_mode (poly_int64 (1, 1), QImode);
  rtx x255 = gen_int_mode (poly_int64 (1, 255), QImode);

  /* Test that constants are unique.  */
  ASSERT_EQ (x1, gen_int_mode (poly_int64 (1, 1), QImode));
  ASSERT_NE (x1, gen_int_mode (poly_int64 (1, 1), HImode));
  ASSERT_NE (x1, x255);

  /* Test const_poly_int_value.  */
  ASSERT_KNOWN_EQ (const_poly_int_value (x1), poly_int64 (1, 1));
  ASSERT_KNOWN_EQ (const_poly_int_value (x255), poly_int64 (1, -1));

  /* Test rtx_to_poly_int64.  */
  ASSERT_KNOWN_EQ (rtx_to_poly_int64 (x1), poly_int64 (1, 1));
  ASSERT_KNOWN_EQ (rtx_to_poly_int64 (x255), poly_int64 (1, -1));
  ASSERT_MAYBE_NE (rtx_to_poly_int64 (x255), poly_int64 (1, 255));

  /* Test plus_constant of a symbol.  */
  rtx symbol = gen_rtx_SYMBOL_REF (Pmode, "foo");
  rtx offset1 = gen_int_mode (poly_int64 (9, 11), Pmode);
  rtx sum1 = gen_rtx_CONST (Pmode, gen_rtx_PLUS (Pmode, symbol, offset1));
  ASSERT_RTX_EQ (plus_constant (Pmode, symbol, poly_int64 (9, 11)), sum1);

  /* Test plus_constant of a CONST.  */
  rtx offset2 = gen_int_mode (poly_int64 (12, 20), Pmode);
  rtx sum2 = gen_rtx_CONST (Pmode, gen_rtx_PLUS (Pmode, symbol, offset2));
  ASSERT_RTX_EQ (plus_constant (Pmode, sum1, poly_int64 (3, 9)), sum2);

  /* Test a cancelling plus_constant.  */
  ASSERT_EQ (plus_constant (Pmode, sum2, poly_int64 (-12, -20)), symbol);

  /* Test plus_constant on integer constants.  */
  ASSERT_EQ (plus_constant (QImode, const1_rtx, poly_int64 (4, -2)),
	     gen_int_mode (poly_int64 (5, -2), QImode));
  ASSERT_EQ (plus_constant (QImode, x1, poly_int64 (4, -2)),
	     gen_int_mode (poly_int64 (5, -1), QImode));
}

/* Check dumping of repeated RTL vectors.  */

static void
test_dumping_repeat ()
{
  rtx p = gen_rtx_PARALLEL (VOIDmode, rtvec_alloc (3));
  XVECEXP (p, 0, 0) = const0_rtx;
  XVECEXP (p, 0, 1) = const0_rtx;
  XVECEXP (p, 0, 2) = const0_rtx;
  ASSERT_RTL_DUMP_EQ ("(parallel [\n"
		      "        (const_int 0) repeated x3\n"
		      "    ])",
		      p);

  XVECEXP (p, 0, 1) = const1_rtx;
  ASSERT_RTL_DUMP_EQ ("(parallel [\n"
		      "        (const_int 0)\n"
		      "        (const_int 1)\n"
		      "        (const_int 0)\n"
		      "    ])",
		      p);
}

/* 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 ();
  const_poly_int_tests<NUM_POLY_INT_COEFFS>::run ();
  test_dumping_repeat ();

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

} // namespace selftest
#endif /* #if CHECKING_P */
Commit	Line	Data
d9b950dd	1	/* Unit tests for RTL-handling.
8d9254fc	2	Copyright (C) 2015-2020 Free Software Foundation, Inc.
d9b950dd DM	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	#include "config.h"
	21	#include "system.h"
	22	#include "coretypes.h"
	23	#include "tm.h"
	24	#include "opts.h"
d9b950dd DM	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"
40af5894	40	#include "selftest-rtl.h"
d9b950dd	41	#include "function.h"
4d0cdd0c	42	#include "memmodel.h"
d9b950dd DM	43	#include "emit-rtl.h"
	44
	45	#if CHECKING_P
	46
	47	namespace selftest {
	48
	49	/* Verify that PAT is printed as EXPECTED. Helper function for
	50	selftests. */
	51
	52	static void
	53	verify_print_pattern (const char *expected, rtx pat)
	54	{
	55	pretty_printer pp;
	56	print_pattern (&pp, pat, 1);
	57	ASSERT_STREQ (expected, pp_formatted_text (&pp));
	58	}
	59
e2ce9e83 DM	60	/* Verify that X is dumped as EXPECTED_DUMP, using compact mode.
	61	Use LOC as the effective location when reporting errors. */
	62
40af5894	63	void
00439aef DM	64	assert_rtl_dump_eq (const location &loc, const char *expected_dump, rtx x,
00439aef DM	65	rtx_reuse_manager *reuse_manager)
e2ce9e83 DM	66	{
	67	named_temp_file tmp_out (".rtl");
	68	FILE *outfile = fopen (tmp_out.get_filename (), "w");
00439aef	69	rtx_writer w (outfile, 0, false, true, reuse_manager);
36cd856f	70	w.print_rtl (x);
e2ce9e83 DM	71	fclose (outfile);
	72
	73	char *dump = read_file (SELFTEST_LOCATION, tmp_out.get_filename ());
	74	ASSERT_STREQ_AT (loc, expected_dump, dump);
	75	free (dump);
	76	}
	77
e2ce9e83 DM	78	/* Verify that regs are dumped as expected (in compact mode). */
	79
	80	static void
	81	test_dumping_regs ()
	82	{
	83	/* Dumps of hard regs contain a target-specific name, so we don't test
40af5894	84	it here; this can be tested in target-specific selftests. */
e2ce9e83 DM	85
	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)
	90	{
	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);
	103	}
	104
	105	/* Test dumping of non-virtual pseudos. */
596762ee	106	ASSERT_RTL_DUMP_EQ ("(reg:SI <0>)",
e2ce9e83	107	gen_raw_REG (SImode, LAST_VIRTUAL_REGISTER + 1));
596762ee	108	ASSERT_RTL_DUMP_EQ ("(reg:SI <1>)",
e2ce9e83 DM	109	gen_raw_REG (SImode, LAST_VIRTUAL_REGISTER + 2));
	110	}
	111
	112	/* Verify that insns are dumped as expected (in compact mode). */
	113
	114	static void
	115	test_dumping_insns ()
	116	{
	117	/* Barriers. */
	118	rtx_barrier barrier = as_a <rtx_barrier > (rtx_alloc (BARRIER));
	119	SET_NEXT_INSN (barrier) = NULL;
7574cfd4	120	ASSERT_RTL_DUMP_EQ ("(cbarrier 0)\n", barrier);
e2ce9e83 DM	121
	122	/* Labels. */
	123	rtx_insn *label = gen_label_rtx ();
	124	CODE_LABEL_NUMBER (label) = 42;
b5fbe716	125	ASSERT_RTL_DUMP_EQ ("(clabel 0 42)\n", label);
e2ce9e83 DM	126
	127	LABEL_NAME (label)= "some_label";
	128	ASSERT_RTL_DUMP_EQ ("(clabel 0 42 (\"some_label\"))\n", label);
	129	}
	130
00439aef DM	131	/* Manually exercise the rtx_reuse_manager code. */
	132
	133	static void
	134	test_dumping_rtx_reuse ()
	135	{
	136	rtx_reuse_manager r;
	137
	138	rtx x = rtx_alloc (SCRATCH);
	139	rtx y = rtx_alloc (SCRATCH);
	140	rtx z = rtx_alloc (SCRATCH);
	141
	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);
	147
	148	/* z will be only seen once. */
	149	r.preprocess (z);
	150
	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);
	155
	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);
	159
	160	/* z is only seen once and thus shouldn't get a reuse ID. */
	161	ASSERT_FALSE (r.has_reuse_id (z, NULL));
	162
	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);
	168
	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);
	172
	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);
	176	}
	177
d9b950dd DM	178	/* Unit testing of "single_set". */
	179
	180	static void
	181	test_single_set ()
	182	{
	183	/* A label is not a SET. */
	184	ASSERT_EQ (NULL_RTX, single_set (gen_label_rtx ()));
	185
	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));
	192
	193	/* etc */
	194	}
	195
	196	/* Construct an unconditional jump to a label, and verify that
	197	various properties of it are sane. */
	198
	199	static void
	200	test_uncond_jump ()
	201	{
51b86113	202	set_new_first_and_last_insn (NULL, NULL);
d9b950dd DM	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);
04a121a7	209	ASSERT_EQ (label, label_ref_label (SET_SRC (jump_pat)));
d9b950dd DM	210	ASSERT_EQ (PC, SET_DEST (jump_pat)->code);
	211
	212	verify_print_pattern ("pc=L0", jump_pat);
	213
e2ce9e83 DM	214	ASSERT_RTL_DUMP_EQ ("(set (pc)\n"
	215	" (label_ref 0))",
	216	jump_pat);
	217
d9b950dd DM	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));
e2ce9e83	225
7574cfd4	226	ASSERT_RTL_DUMP_EQ ("(cjump_insn 1 (set (pc)\n"
b5fbe716	227	" (label_ref 0)))\n",
e2ce9e83	228	jump_insn);
d9b950dd DM	229	}
d9b950dd DM	230
0c12fc9b RS	231	template<unsigned int N>
	232	struct const_poly_int_tests
	233	{
	234	static void run ();
	235	};
	236
	237	template<>
	238	struct const_poly_int_tests<1>
	239	{
	240	static void run () {}
	241	};
	242
	243	/* Test various CONST_POLY_INT properties. */
	244
	245	template<unsigned int N>
	246	void
	247	const_poly_int_tests<N>::run ()
	248	{
	249	rtx x1 = gen_int_mode (poly_int64 (1, 1), QImode);
	250	rtx x255 = gen_int_mode (poly_int64 (1, 255), QImode);
	251
	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);
	256
	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));
	260
	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));
	265
	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);
	271
	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);
	276
	277	/* Test a cancelling plus_constant. */
	278	ASSERT_EQ (plus_constant (Pmode, sum2, poly_int64 (-12, -20)), symbol);
	279
	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));
	285	}
	286
2045ae1d AS	287	/* Check dumping of repeated RTL vectors. */
	288
	289	static void
	290	test_dumping_repeat ()
	291	{
	292	rtx p = gen_rtx_PARALLEL (VOIDmode, rtvec_alloc (3));
	293	XVECEXP (p, 0, 0) = const0_rtx;
	294	XVECEXP (p, 0, 1) = const0_rtx;
	295	XVECEXP (p, 0, 2) = const0_rtx;
	296	ASSERT_RTL_DUMP_EQ ("(parallel [\n"
	297	" (const_int 0) repeated x3\n"
	298	" ])",
	299	p);
	300
	301	XVECEXP (p, 0, 1) = const1_rtx;
	302	ASSERT_RTL_DUMP_EQ ("(parallel [\n"
	303	" (const_int 0)\n"
	304	" (const_int 1)\n"
	305	" (const_int 0)\n"
	306	" ])",
	307	p);
	308	}
	309
d9b950dd DM	310	/* Run all of the selftests within this file. */
	311
	312	void
	313	rtl_tests_c_tests ()
	314	{
e2ce9e83 DM	315	test_dumping_regs ();
e2ce9e83 DM	316	test_dumping_insns ();
00439aef	317	test_dumping_rtx_reuse ();
d9b950dd DM	318	test_single_set ();
d9b950dd DM	319	test_uncond_jump ();
0c12fc9b	320	const_poly_int_tests<NUM_POLY_INT_COEFFS>::run ();
2045ae1d	321	test_dumping_repeat ();
d9b950dd DM	322
	323	/* Purge state. */
	324	set_first_insn (NULL);
	325	set_last_insn (NULL);
	326	}
	327
	328	} // namespace selftest
	329	#endif /* #if CHECKING_P */