[PeepholeOptimizer] Take advantage of the isExtractSubreg property in the

[oota-llvm.git] / lib / CodeGen / LatencyPriorityQueue.cpp

diff --git a/lib/CodeGen/LatencyPriorityQueue.cpp b/lib/CodeGen/LatencyPriorityQueue.cpp
index e88d537d3189b15cf86f424946cdda0a68fd508a..cdf505e3e0c9cc030c346caf6833309516ce49a2 100644 (file)
--- a/lib/CodeGen/LatencyPriorityQueue.cpp
+++ b/lib/CodeGen/LatencyPriorityQueue.cpp
@@ -13,12 +13,13 @@
 //
 //===----------------------------------------------------------------------===//
 
-#define DEBUG_TYPE "scheduler"
 #include "llvm/CodeGen/LatencyPriorityQueue.h"
 #include "llvm/Support/Debug.h"
 #include "llvm/Support/raw_ostream.h"
 using namespace llvm;
 
+#define DEBUG_TYPE "scheduler"
+
 bool latency_sort::operator()(const SUnit *LHS, const SUnit *RHS) const {
   // The isScheduleHigh flag allows nodes with wraparound dependencies that
   // cannot easily be modeled as edges with latencies to be scheduled as
@@ -53,7 +54,7 @@ bool latency_sort::operator()(const SUnit *LHS, const SUnit *RHS) const {
 /// getSingleUnscheduledPred - If there is exactly one unscheduled predecessor
 /// of SU, return it, otherwise return null.
 SUnit *LatencyPriorityQueue::getSingleUnscheduledPred(SUnit *SU) {
-  SUnit *OnlyAvailablePred = 0;
+  SUnit *OnlyAvailablePred = nullptr;
   for (SUnit::const_pred_iterator I = SU->Preds.begin(), E = SU->Preds.end();
        I != E; ++I) {
     SUnit &Pred = *I->getSUnit();
@@ -61,7 +62,7 @@ SUnit *LatencyPriorityQueue::getSingleUnscheduledPred(SUnit *SU) {
       // We found an available, but not scheduled, predecessor.  If it's the
       // only one we have found, keep track of it... otherwise give up.
       if (OnlyAvailablePred && OnlyAvailablePred != &Pred)
-        return 0;
+        return nullptr;
       OnlyAvailablePred = &Pred;
     }
   }
@@ -105,7 +106,7 @@ void LatencyPriorityQueue::AdjustPriorityOfUnscheduledPreds(SUnit *SU) {
   if (SU->isAvailable) return;  // All preds scheduled.
 
   SUnit *OnlyAvailablePred = getSingleUnscheduledPred(SU);
-  if (OnlyAvailablePred == 0 || !OnlyAvailablePred->isAvailable) return;
+  if (!OnlyAvailablePred || !OnlyAvailablePred->isAvailable) return;
 
   // Okay, we found a single predecessor that is available, but not scheduled.
   // Since it is available, it must be in the priority queue.  First remove it.
@@ -117,7 +118,7 @@ void LatencyPriorityQueue::AdjustPriorityOfUnscheduledPreds(SUnit *SU) {
 }
 
 SUnit *LatencyPriorityQueue::pop() {
-  if (empty()) return NULL;
+  if (empty()) return nullptr;
   std::vector<SUnit *>::iterator Best = Queue.begin();
   for (std::vector<SUnit *>::iterator I = std::next(Queue.begin()),
        E = Queue.end(); I != E; ++I)