[llvm] r355757 - [RegisterCoalescer][NFC] bind a DenseMap access to a reference to avoid

[Wei Mi via llvm-commits]

Author: wmi
Date: Fri Mar  8 15:29:46 2019
New Revision: 355757

URL: http://llvm.org/viewvc/llvm-project?rev=355757&view=rev
Log:
[RegisterCoalescer][NFC] bind a DenseMap access to a reference to avoid
repeated lookup operations


Modified:
    llvm/trunk/lib/CodeGen/RegisterCoalescer.cpp

Modified: llvm/trunk/lib/CodeGen/RegisterCoalescer.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/RegisterCoalescer.cpp?rev=355757&r1=355756&r2=355757&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/RegisterCoalescer.cpp (original)
+++ llvm/trunk/lib/CodeGen/RegisterCoalescer.cpp Fri Mar  8 15:29:46 2019
@@ -3277,8 +3277,9 @@ void RegisterCoalescer::mergeSubRangeInt
 bool RegisterCoalescer::isHighCostLiveInterval(LiveInterval &LI) {
   if (LI.valnos.size() < LargeIntervalSizeThreshold)
     return false;
-  if (LargeLIVisitCounter[LI.reg] < LargeIntervalFreqThreshold) {
-    LargeLIVisitCounter[LI.reg]++;
+  auto &counter = LargeLIVisitCounter[LI.reg];
+  if (counter < LargeIntervalFreqThreshold) {
+    counter++;
     return false;
   }
   return true;