From 04cfdd38a26620e509bd852afd993b3dd458dc33 Mon Sep 17 00:00:00 2001
From: Owen Anderson <resistor@mac.com>
Date: Fri, 29 May 2009 05:37:54 +0000
Subject: Fix an issue where phiMap was not being updated properly when doing
 load PRE.

Diagnosis and patch thanks to Jakub Staszak.

llvm-svn: 72562
---
 llvm/lib/Transforms/Scalar/GVN.cpp | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'llvm/lib/Transforms')

diff --git a/llvm/lib/Transforms/Scalar/GVN.cpp b/llvm/lib/Transforms/Scalar/GVN.cpp
index 260bbedddc9..222320f5257 100644
--- a/llvm/lib/Transforms/Scalar/GVN.cpp
+++ b/llvm/lib/Transforms/Scalar/GVN.cpp
@@ -1125,6 +1125,11 @@ bool GVN::processNonLocalLoad(LoadInst *LI,
                                 LI->getAlignment(),
                                 UnavailablePred->getTerminator());
   
+  SmallPtrSet<Instruction*, 4> &p = phiMap[LI->getPointerOperand()];
+  for (SmallPtrSet<Instruction*, 4>::iterator I = p.begin(), E = p.end();
+       I != E; ++I)
+    ValuesPerBlock.push_back(std::make_pair((*I)->getParent(), *I));
+  
   DenseMap<BasicBlock*, Value*> BlockReplValues;
   BlockReplValues.insert(ValuesPerBlock.begin(), ValuesPerBlock.end());
   BlockReplValues[UnavailablePred] = NewLoad;
-- 
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