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re PR rtl-optimization/56246 (ICE in assign_by_spills, at lra-assigns.c:1262)

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2013-02-08  Vladimir Makarov  <vmakarov@redhat.com>

	PR rtl-optimization/56246
	* lra-constraints.c (simplify_operand_subreg): Try tor reuse
	reload pseudo.
	* lra.c (lra): Clear lra_optional_reload_pseudos only when all
	constraints are satisfied.

2013-02-08  Vladimir Makarov  <vmakarov@redhat.com>

	PR rtl-optimization/56246
	* gcc.target/i386/pr56246.c: New test.

From-SVN: r195902
This commit is contained in:
Vladimir Makarov 2013-02-08 21:59:11 +00:00 committed by Vladimir Makarov
parent a698cc0308
commit 25bb0bb5b0
5 changed files with 40 additions and 18 deletions
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8
gcc/ChangeLog
View File

@ -1,3 +1,11 @@
2013-02-08 Vladimir Makarov <vmakarov@redhat.com>
PR rtl-optimization/56246
* lra-constraints.c (simplify_operand_subreg): Try tor reuse
reload pseudo.
* lra.c (lra): Clear lra_optional_reload_pseudos only when all
constraints are satisfied.
2013-02-08 Jeff Law <law@redhat.com>
PR debug/53948

36
gcc/lra-constraints.c
View File

@ -1213,24 +1213,26 @@ simplify_operand_subreg (int nop, enum machine_mode reg_mode)
enum reg_class rclass
= (enum reg_class) targetm.preferred_reload_class (reg, ALL_REGS);
new_reg = lra_create_new_reg_with_unique_value (reg_mode, reg, rclass,
"subreg reg");
bitmap_set_bit (&lra_optional_reload_pseudos, REGNO (new_reg));
if (type != OP_OUT
|| GET_MODE_SIZE (GET_MODE (reg)) > GET_MODE_SIZE (mode))
if (get_reload_reg (curr_static_id->operand[nop].type, reg_mode, reg,
rclass, "subreg reg", &new_reg))
{
push_to_sequence (before);
lra_emit_move (new_reg, reg);
before = get_insns ();
end_sequence ();
}
if (type != OP_IN)
{
start_sequence ();
lra_emit_move (reg, new_reg);
emit_insn (after);
after = get_insns ();
end_sequence ();
bitmap_set_bit (&lra_optional_reload_pseudos, REGNO (new_reg));
if (type != OP_OUT
|| GET_MODE_SIZE (GET_MODE (reg)) > GET_MODE_SIZE (mode))
{
push_to_sequence (before);
lra_emit_move (new_reg, reg);
before = get_insns ();
end_sequence ();
}
if (type != OP_IN)
{
start_sequence ();
lra_emit_move (reg, new_reg);
emit_insn (after);
after = get_insns ();
end_sequence ();
}
}
SUBREG_REG (operand) = new_reg;
lra_process_new_insns (curr_insn, before, after,

2
gcc/lra.c
View File

@ -2272,7 +2272,6 @@ lra (FILE *f)
{
for (;;)
{
bitmap_clear (&lra_optional_reload_pseudos);
/* We should try to assign hard registers to scratches even
if there were no RTL transformations in
lra_constraints. */
@ -2311,6 +2310,7 @@ lra (FILE *f)
live_p = false;
}
}
bitmap_clear (&lra_optional_reload_pseudos);
bitmap_clear (&lra_inheritance_pseudos);
bitmap_clear (&lra_split_regs);
if (! lra_need_for_spills_p ())

5
gcc/testsuite/ChangeLog
View File

@ -1,3 +1,8 @@
2013-02-08 Vladimir Makarov <vmakarov@redhat.com>
PR rtl-optimization/56246
* gcc.target/i386/pr56246.c: New test.
2013-02-08 Jeff Law <law@redhat.com>
PR debug/53948

7
gcc/testsuite/gcc.target/i386/pr56246.c Normal file
View File

@ -0,0 +1,7 @@
/* PR target/56225 */
/* { dg-do compile { target { ia32 } } } */
/* { dg-options "-O2 -fno-omit-frame-pointer -march=i686 -fpic" } */
void NoBarrier_AtomicExchange (long long *ptr) {
while (__sync_val_compare_and_swap (ptr, 1, 0) );
}