[ADT] Change PostOrderIterator to use NodeRef. NFC.
Reviewers: dblaikie
Subscribers: mzolotukhin, llvm-commits
Differential Revision: https://reviews.llvm.org/D23522
llvm-svn: 278752
diff --git a/llvm/lib/CodeGen/MachineTraceMetrics.cpp b/llvm/lib/CodeGen/MachineTraceMetrics.cpp
index 86332c8..ef7e525 100644
--- a/llvm/lib/CodeGen/MachineTraceMetrics.cpp
+++ b/llvm/lib/CodeGen/MachineTraceMetrics.cpp
@@ -430,16 +430,17 @@
po_iterator_storage(LoopBounds &lb) : LB(lb) {}
void finishPostorder(const MachineBasicBlock*) {}
- bool insertEdge(const MachineBasicBlock *From, const MachineBasicBlock *To) {
+ bool insertEdge(Optional<const MachineBasicBlock *> From,
+ const MachineBasicBlock *To) {
// Skip already visited To blocks.
MachineTraceMetrics::TraceBlockInfo &TBI = LB.Blocks[To->getNumber()];
if (LB.Downward ? TBI.hasValidHeight() : TBI.hasValidDepth())
return false;
// From is null once when To is the trace center block.
if (From) {
- if (const MachineLoop *FromLoop = LB.Loops->getLoopFor(From)) {
+ if (const MachineLoop *FromLoop = LB.Loops->getLoopFor(*From)) {
// Don't follow backedges, don't leave FromLoop when going upwards.
- if ((LB.Downward ? To : From) == FromLoop->getHeader())
+ if ((LB.Downward ? To : *From) == FromLoop->getHeader())
return false;
// Don't leave FromLoop.
if (isExitingLoop(FromLoop, LB.Loops->getLoopFor(To)))