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/ScheduleDAG.cpp b/lib/CodeGen/ScheduleDAG.cpp
index 1363a92..6b27db2 100644
--- a/lib/CodeGen/ScheduleDAG.cpp
+++ b/lib/CodeGen/ScheduleDAG.cpp
@@ -214,7 +214,10 @@
unsigned MaxPredDepth = 0;
for (SUnit::const_pred_iterator I = Cur->Preds.begin(),
E = Cur->Preds.end(); I != E; ++I) {
- if (IgnoreAntiDep && (I->getKind() == SDep::Anti)) continue;
+ if (IgnoreAntiDep &&
+ ((I->getKind() == SDep::Anti) || (I->getKind() == SDep::Output)))
+ continue;
+
SUnit *PredSU = I->getSUnit();
if (PredSU->isDepthCurrent)
MaxPredDepth = std::max(MaxPredDepth,
@@ -248,7 +251,10 @@
unsigned MaxSuccHeight = 0;
for (SUnit::const_succ_iterator I = Cur->Succs.begin(),
E = Cur->Succs.end(); I != E; ++I) {
- if (IgnoreAntiDep && (I->getKind() == SDep::Anti)) continue;
+ if (IgnoreAntiDep &&
+ ((I->getKind() == SDep::Anti) || (I->getKind() == SDep::Output)))
+ continue;
+
SUnit *SuccSU = I->getSUnit();
if (SuccSU->isHeightCurrent)
MaxSuccHeight = std::max(MaxSuccHeight,