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Rename registers to break output dependencies in addition to anti-dependencies.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@87015 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
David Goodwin
2009-11-12 19:08:21 +00:00
parent 70d75ca310
commit 12dd99dc30
4 changed files with 30 additions and 10 deletions
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10
lib/CodeGen/PostRASchedulerList.cpp
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@@ -603,7 +603,9 @@ void SchedulePostRATDList::ReleaseSucc(SUnit *SU, SDep *SuccEdge,
void SchedulePostRATDList::ReleaseSuccessors(SUnit *SU, bool IgnoreAntiDep) {
for (SUnit::succ_iterator I = SU->Succs.begin(), E = SU->Succs.end();
I != E; ++I) {
if (IgnoreAntiDep && (I->getKind() == SDep::Anti)) continue;
if (IgnoreAntiDep &&
((I->getKind() == SDep::Anti) || (I->getKind() == SDep::Output)))
continue;
ReleaseSucc(SU, &*I, IgnoreAntiDep);
}
}
@@ -658,7 +660,7 @@ void SchedulePostRATDList::ListScheduleTopDown(
available = true;
for (SUnit::const_pred_iterator I = SUnits[i].Preds.begin(),
E = SUnits[i].Preds.end(); I != E; ++I) {
if (I->getKind() != SDep::Anti) {
if ((I->getKind() != SDep::Anti) && (I->getKind() != SDep::Output)) {
available = false;
} else {
SUnits[i].NumPredsLeft -= 1;
@@ -737,7 +739,9 @@ void SchedulePostRATDList::ListScheduleTopDown(
AntiDepBreaker::AntiDepRegVector AntiDepRegs;
for (SUnit::const_pred_iterator I = FoundSUnit->Preds.begin(),
E = FoundSUnit->Preds.end(); I != E; ++I) {
if ((I->getKind() == SDep::Anti) && !I->getSUnit()->isScheduled)
if (((I->getKind() == SDep::Anti) ||
(I->getKind() == SDep::Output)) &&
!I->getSUnit()->isScheduled)
AntiDepRegs.push_back(I->getReg());
}