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If PrototypeValue is erased in the middle of using the SSAUpdator

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then the SSAUpdator may access freed memory.  Instead, simply pass
in the type and name explicitly, which is all that was used anyway.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112699 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Duncan Sands
2010-09-01 10:29:33 +00:00
parent 248e7592b5
commit 4d588bceb0
7 changed files with 25 additions and 25 deletions
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lib/Transforms/Scalar/JumpThreading.cpp
+2 -2
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@@ -1526,7 +1526,7 @@ bool JumpThreading::ThreadEdge(BasicBlock *BB,
// We found a use of I outside of BB. Rename all uses of I that are outside
// its block to be uses of the appropriate PHI node etc. See ValuesInBlocks
// with the two values we know.
SSAUpdate.Initialize(I);
SSAUpdate.Initialize(I->getType(), I->getName());
SSAUpdate.AddAvailableValue(BB, I);
SSAUpdate.AddAvailableValue(NewBB, ValueMapping[I]);
@@ -1681,7 +1681,7 @@ bool JumpThreading::DuplicateCondBranchOnPHIIntoPred(BasicBlock *BB,
// We found a use of I outside of BB. Rename all uses of I that are outside
// its block to be uses of the appropriate PHI node etc. See ValuesInBlocks
// with the two values we know.
SSAUpdate.Initialize(I);
SSAUpdate.Initialize(I->getType(), I->getName());
SSAUpdate.AddAvailableValue(BB, I);
SSAUpdate.AddAvailableValue(PredBB, ValueMapping[I]);