Do a scheduling pass ignoring anti-dependencies to identify candidate registers that should be renamed.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85939 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/LatencyPriorityQueue.cpp b/lib/CodeGen/LatencyPriorityQueue.cpp
index 2e7b89c..794ecf7 100644
--- a/lib/CodeGen/LatencyPriorityQueue.cpp
+++ b/lib/CodeGen/LatencyPriorityQueue.cpp
@@ -55,6 +55,7 @@
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;
SUnit &Pred = *I->getSUnit();
if (!Pred.isScheduled) {
// We found an available, but not scheduled, predecessor. If it's the
@@ -73,9 +74,11 @@
// this node is the sole unscheduled node for.
unsigned NumNodesBlocking = 0;
for (SUnit::const_succ_iterator I = SU->Succs.begin(), E = SU->Succs.end();
- I != E; ++I)
+ I != E; ++I) {
+ if (IgnoreAntiDep && (I->getKind() == SDep::Anti)) continue;
if (getSingleUnscheduledPred(I->getSUnit()) == SU)
++NumNodesBlocking;
+ }
NumNodesSolelyBlocking[SU->NodeNum] = NumNodesBlocking;
Queue.push(SU);
@@ -88,8 +91,10 @@
// the node available.
void LatencyPriorityQueue::ScheduledNode(SUnit *SU) {
for (SUnit::const_succ_iterator I = SU->Succs.begin(), E = SU->Succs.end();
- I != E; ++I)
+ I != E; ++I) {
+ if (IgnoreAntiDep && (I->getKind() == SDep::Anti)) continue;
AdjustPriorityOfUnscheduledPreds(I->getSUnit());
+ }
}
/// AdjustPriorityOfUnscheduledPreds - One of the predecessors of SU was just