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re PR rtl-optimization/37514 (Wrong code generated for 20021120-1.c with -O3 -fomit-frame-pointer on sh4)

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2008-12-01  Vladimir Makarov  <vmakarov@redhat.com>

	PR rtl-optimization/37514
	* reload1.c (reload_as_needed): Invalidate reg_last_reload
	from previous insns.

From-SVN: r142328
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Vladimir Makarov 2008-12-01 19:31:41 +00:00 committed by Vladimir Makarov
parent 34d5d95884
commit bf8ba8ab41
2 changed files with 36 additions and 0 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2008-12-01 Vladimir Makarov <vmakarov@redhat.com>
PR rtl-optimization/37514
* reload1.c (reload_as_needed): Invalidate reg_last_reload
from previous insns.
2008-12-01 Jakub Jelinek <jakub@redhat.com>
PR c++/38348

30
gcc/reload1.c
View File

@ -4164,6 +4164,9 @@ reload_as_needed (int live_known)
rtx prev = 0;
rtx insn = chain->insn;
rtx old_next = NEXT_INSN (insn);
#ifdef AUTO_INC_DEC
rtx old_prev = PREV_INSN (insn);
#endif
/* If we pass a label, copy the offsets from the label information
into the current offsets of each elimination. */
@ -4388,6 +4391,33 @@ reload_as_needed (int live_known)
SET_REGNO_REG_SET (&reg_has_output_reload,
REGNO (XEXP (in_reg, 0)));
}
else if ((code == PRE_INC || code == PRE_DEC
|| code == POST_INC || code == POST_DEC))
{
int in_hard_regno;
int in_regno = REGNO (XEXP (in_reg, 0));
if (reg_last_reload_reg[in_regno] != NULL_RTX)
{
in_hard_regno = REGNO (reg_last_reload_reg[in_regno]);
gcc_assert (TEST_HARD_REG_BIT (reg_reloaded_valid,
in_hard_regno));
for (x = old_prev ? NEXT_INSN (old_prev) : insn;
x != old_next;
x = NEXT_INSN (x))
if (x == reg_reloaded_insn[in_hard_regno])
break;
/* If for some reasons, we didn't set up
reg_last_reload_reg in this insn,
invalidate inheritance from previous
insns for the incremented/decremented
register. Such registers will be not in
reg_has_output_reload. */
if (x == old_next)
forget_old_reloads_1 (XEXP (in_reg, 0),
NULL_RTX, NULL);
}
}
}
}
/* If a pseudo that got a hard register is auto-incremented,