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/* 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
GCC is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or
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
<>. */
#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"
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. */
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)",
ASSERT_RTL_DUMP_EQ ("(reg:DI virtual-stack-vars)",
ASSERT_RTL_DUMP_EQ ("(reg:DI virtual-stack-dynamic)",
ASSERT_RTL_DUMP_EQ ("(reg:DI virtual-outgoing-args)",
ASSERT_RTL_DUMP_EQ ("(reg:DI virtual-cfa)",
ASSERT_RTL_DUMP_EQ ("(reg:DI virtual-preferred-stack-boundary)",
/* 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,
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))",
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",
template<unsigned int N>
struct const_poly_int_tests
static void run ();
struct const_poly_int_tests<1>
static void run () {}
/* Test various CONST_POLY_INT properties. */
template<unsigned int N>
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"
" ])",
XVECEXP (p, 0, 1) = const1_rtx;
ASSERT_RTL_DUMP_EQ ("(parallel [\n"
" (const_int 0)\n"
" (const_int 1)\n"
" (const_int 0)\n"
" ])",
/* Run all of the selftests within this file. */
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 */