Rename registers to break output dependencies in addition to anti-dependencies.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@87015 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/PostRASchedulerList.cpp b/lib/CodeGen/PostRASchedulerList.cpp
index b5729bb..a29f349 100644
--- a/lib/CodeGen/PostRASchedulerList.cpp
+++ b/lib/CodeGen/PostRASchedulerList.cpp
@@ -603,7 +603,9 @@
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 @@
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 @@
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());
}