From: Dan Gohman <gohman@apple.com>
Date: Tue, 25 May 2010 21:59:42 +0000 (+0000)
Subject: Do one map lookup instead of two.
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=eddc114a66b4520369e0f86ab1d3132dac2449b2;p=oota-llvm.git

Do one map lookup instead of two.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@104645 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/CodeGen/SelectionDAG/FastISel.cpp b/lib/CodeGen/SelectionDAG/FastISel.cpp
index 1996c192ec7..95f4d072e01 100644
--- a/lib/CodeGen/SelectionDAG/FastISel.cpp
+++ b/lib/CodeGen/SelectionDAG/FastISel.cpp
@@ -99,8 +99,9 @@ unsigned FastISel::getRegForValue(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;
   unsigned Reg = LocalValueMap[V];
   if (Reg != 0)
     return Reg;