From: Owen Anderson <resistor@mac.com>
Date: Fri, 29 May 2009 05:37:54 +0000 (+0000)
Subject: Fix an issue where phiMap was not being updated properly when doing load PRE.
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=246ddf55d12c3347a5a4e5d1cc04e6a31974f0c8;p=oota-llvm.git

Fix an issue where phiMap was not being updated properly when doing load PRE.

Diagnosis and patch thanks to Jakub Staszak.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@72562 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Transforms/Scalar/GVN.cpp b/lib/Transforms/Scalar/GVN.cpp
index 260bbedddc9..222320f5257 100644
--- a/lib/Transforms/Scalar/GVN.cpp
+++ b/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;