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re PR rtl-optimization/55414 (spec2006 416.gamess compilation fails on LRA) 

2012-11-21  Vladimir Makarov  <vmakarov@redhat.com>

	PR rtl-optimization/55414
	* lra-constraints.c (Index): New function.
	(lra_constraints): Check dead equiv init insns.

From-SVN: r193712
This commit is contained in:
Vladimir Makarov 2012-11-21 22:22:11 +00:00 committed by Vladimir Makarov
parent ecdbf2cdfa
commit 1966c91bf4
2 changed files with 40 additions and 17 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2012-11-21 Vladimir Makarov <vmakarov@redhat.com>
PR rtl-optimization/55414
* lra-constraints.c (Index): New function.
(lra_constraints): Check dead equiv init insns.
2012-11-21 Richard Henderson <rth@redhat.com>
* config/alpha/alpha.md (extvmisaligndi): Rename from extv; update

51
gcc/lra-constraints.c
View File

@ -3215,6 +3215,17 @@ multi_block_pseudo_p (int regno)
return false;
}
/* Return true if LIST contains a deleted insn. */
static bool
contains_deleted_insn_p (rtx list)
{
for (; list != NULL_RTX; list = XEXP (list, 1))
if (NOTE_P (XEXP (list, 0))
&& NOTE_KIND (XEXP (list, 0)) == NOTE_INSN_DELETED)
return true;
return false;
}
/* Return true if X contains a pseudo dying in INSN. */
static bool
dead_pseudo_p (rtx x, rtx insn)
@ -3317,10 +3328,29 @@ lra_constraints (bool first_p)
bool pseudo_p = contains_reg_p (x, false, false);
rtx set, insn;
/* We don't use DF for compilation speed sake. So it is
problematic to update live info when we use an
equivalence containing pseudos in more than one BB. */
if ((pseudo_p && multi_block_pseudo_p (i))
/* After RTL transformation, we can not guarantee that
pseudo in the substitution was not reloaded which might
make equivalence invalid. For example, in reverse
equiv of p0
p0 <- ...
...
equiv_mem <- p0
the memory address register was reloaded before the 2nd
insn. */
if ((! first_p && pseudo_p)
/* We don't use DF for compilation speed sake. So it
is problematic to update live info when we use an
equivalence containing pseudos in more than one
BB. */
|| (pseudo_p && multi_block_pseudo_p (i))
/* If an init insn was deleted for some reason, cancel
the equiv. We could update the equiv insns after
transformations including an equiv insn deletion
but it is not worthy as such cases are extremely
rare. */
|| contains_deleted_insn_p (ira_reg_equiv[i].init_insns)
/* If it is not a reverse equivalence, we check that a
pseudo in rhs of the init insn is not dying in the
insn. Otherwise, the live info at the beginning of
@ -3335,19 +3365,6 @@ lra_constraints (bool first_p)
&& (int) REGNO (SET_DEST (set)) == i)
&& init_insn_rhs_dead_pseudo_p (i)))
ira_reg_equiv[i].defined_p = false;
else if (! first_p && pseudo_p)
/* After RTL transformation, we can not guarantee that
pseudo in the substitution was not reloaded which
might make equivalence invalid. For example, in
reverse equiv of p0
p0 <- ...
...
equiv_mem <- p0
the memory address register was reloaded before the
2nd insn. */
ira_reg_equiv[i].defined_p = false;
if (contains_reg_p (x, false, true))
ira_reg_equiv[i].profitable_p = false;
if (get_equiv_substitution (reg) != reg)