From 7124801b6f19b757ce2e75b2f716c5397ef7a2a0 Mon Sep 17 00:00:00 2001
From: Wei Mi <wmi@google.com>
Date: Fri, 8 Mar 2019 23:29:46 +0000
Subject: [PATCH] [RegisterCoalescer][NFC] bind a DenseMap access to a
 reference to avoid repeated lookup operations

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@355757 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/CodeGen/RegisterCoalescer.cpp | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/lib/CodeGen/RegisterCoalescer.cpp b/lib/CodeGen/RegisterCoalescer.cpp
index f144c99cdd4..237cf184d8b 100644
--- a/lib/CodeGen/RegisterCoalescer.cpp
+++ b/lib/CodeGen/RegisterCoalescer.cpp
@@ -3277,8 +3277,9 @@ void RegisterCoalescer::mergeSubRangeInto(LiveInterval &LI,
 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;
-- 
2.50.1