From 3193a689db3de8640d412ccd9482301647359a4e Mon Sep 17 00:00:00 2001
From: Dan Gohman <gohman@apple.com>
Date: Mon, 21 Jun 2010 14:21:47 +0000
Subject: [PATCH] Do one lookup instead of two.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@106415 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/CodeGen/SelectionDAG/FastISel.cpp | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/lib/CodeGen/SelectionDAG/FastISel.cpp b/lib/CodeGen/SelectionDAG/FastISel.cpp
index 58d8344479c..cc8c3c70ac2 100644
--- a/lib/CodeGen/SelectionDAG/FastISel.cpp
+++ b/lib/CodeGen/SelectionDAG/FastISel.cpp
@@ -185,8 +185,9 @@ unsigned FastISel::lookUpRegForValue(const Value *V) {
   // cache values defined by Instructions across blocks, and other values
   // only locally. This is because Instructions already have the SSA
   // def-dominates-use requirement enforced.
-  if (ValueMap.count(V))
-    return ValueMap[V];
+  DenseMap<const Value *, unsigned>::iterator I = ValueMap.find(V);
+  if (I != ValueMap.end())
+    return I->second;
   return LocalValueMap[V];
 }