From a783224b25d7f6a2225877566ee9586534eb4627 Mon Sep 17 00:00:00 2001
From: Owen Anderson <resistor@mac.com>
Date: Thu, 21 Jun 2007 01:59:05 +0000
Subject: [PATCH] Eliminate a redundant check.  This speeds up optimization of
 253.perlbmk from 13.5 seconds to 10.9 seconds.

llvm-svn: 37683
---
 lib/Transforms/Scalar/GVNPRE.cpp | 10 +++-------
 1 file changed, 3 insertions(+), 7 deletions(-)

diff --git a/lib/Transforms/Scalar/GVNPRE.cpp b/lib/Transforms/Scalar/GVNPRE.cpp
index ef70f679bcf..b1b096e3504 100644
--- a/lib/Transforms/Scalar/GVNPRE.cpp
+++ b/lib/Transforms/Scalar/GVNPRE.cpp
@@ -887,13 +887,9 @@ bool GVNPRE::buildsets_anticin(BasicBlock* BB,
     // However, for opaques, such as constants within PHI nodes, it is
     // possible that they have not yet received a number.  Make sure they do
     // so now.
-    uint32_t valNum = 0;
-    if (isa<BinaryOperator>(*I) || isa<CmpInst>(*I))
-      valNum = VN.lookup(*I);
-    else
-      valNum = VN.lookup_or_add(*I);
-    if (find_leader(anticIn, valNum) == 0)
-      val_insert(anticIn, *I);
+    if (!isa<BinaryOperator>(*I) && !isa<CmpInst>(*I))
+      VN.lookup_or_add(*I);
+    val_insert(anticIn, *I);
   }
       
   clean(anticIn);