From 46fd7a6ef8766d5d1b5816e9f2ceff51d5ceb006 Mon Sep 17 00:00:00 2001
From: Dan Gohman <gohman@apple.com>
Date: Sun, 29 Aug 2010 15:18:49 +0000
Subject: [PATCH] Do one lookup instead of two.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112434 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Transforms/Scalar/LoopStrengthReduce.cpp | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/lib/Transforms/Scalar/LoopStrengthReduce.cpp b/lib/Transforms/Scalar/LoopStrengthReduce.cpp
index 64d493c514d..8370c08d2e1 100644
--- a/lib/Transforms/Scalar/LoopStrengthReduce.cpp
+++ b/lib/Transforms/Scalar/LoopStrengthReduce.cpp
@@ -161,9 +161,10 @@ RegUseTracker::DropUse(size_t LUIdx) {
 
 bool
 RegUseTracker::isRegUsedByUsesOtherThan(const SCEV *Reg, size_t LUIdx) const {
-  if (!RegUsesMap.count(Reg)) return false;
-  const SmallBitVector &UsedByIndices =
-    RegUsesMap.find(Reg)->second.UsedByIndices;
+  RegUsesTy::const_iterator I = RegUsesMap.find(Reg);
+  if (I == RegUsesMap.end())
+    return false;
+  const SmallBitVector &UsedByIndices = I->second.UsedByIndices;
   int i = UsedByIndices.find_first();
   if (i == -1) return false;
   if ((size_t)i != LUIdx) return true;