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/LatencyPriorityQueue.cpp b/lib/CodeGen/LatencyPriorityQueue.cpp
index 794ecf7..23dce4a 100644
--- a/lib/CodeGen/LatencyPriorityQueue.cpp
+++ b/lib/CodeGen/LatencyPriorityQueue.cpp
@@ -55,7 +55,10 @@
SUnit *OnlyAvailablePred = 0;
for (SUnit::const_pred_iterator I = SU->Preds.begin(), E = SU->Preds.end();
I != E; ++I) {
- if (IgnoreAntiDep && (I->getKind() == SDep::Anti)) continue;
+ if (IgnoreAntiDep &&
+ ((I->getKind() == SDep::Anti) || (I->getKind() == SDep::Output)))
+ continue;
+
SUnit &Pred = *I->getSUnit();
if (!Pred.isScheduled) {
// We found an available, but not scheduled, predecessor. If it's the
@@ -75,7 +78,10 @@
unsigned NumNodesBlocking = 0;
for (SUnit::const_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;
+
if (getSingleUnscheduledPred(I->getSUnit()) == SU)
++NumNodesBlocking;
}
@@ -92,7 +98,10 @@
void LatencyPriorityQueue::ScheduledNode(SUnit *SU) {
for (SUnit::const_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;
+
AdjustPriorityOfUnscheduledPreds(I->getSUnit());
}
}