From a538439bf037039b3ae6e861b763cce7879bbbb6 Mon Sep 17 00:00:00 2001
From: Chris Lattner <sabre@nondot.org>
Date: Sun, 12 Dec 2004 22:16:13 +0000
Subject: Reduce number of set operations.

llvm-svn: 18839
---
 llvm/lib/Transforms/Scalar/ADCE.cpp | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

(limited to 'llvm/lib/Transforms/Scalar/ADCE.cpp')

diff --git a/llvm/lib/Transforms/Scalar/ADCE.cpp b/llvm/lib/Transforms/Scalar/ADCE.cpp
index 22b4c347dcb..c7d349932c9 100644
--- a/llvm/lib/Transforms/Scalar/ADCE.cpp
+++ b/llvm/lib/Transforms/Scalar/ADCE.cpp
@@ -91,9 +91,8 @@ private:
   TerminatorInst *convertToUnconditionalBranch(TerminatorInst *TI);
 
   inline void markInstructionLive(Instruction *I) {
-    if (LiveSet.count(I)) return;
+    if (!LiveSet.insert(I).second) return;
     DEBUG(std::cerr << "Insn Live: " << *I);
-    LiveSet.insert(I);
     WorkList.push_back(I);
   }
 
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