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| author | Jakub Staszak <jstaszak@apple.com> | 2011-09-02 15:43:43 +0000 |
|---|---|---|
| committer | Jakub Staszak <jstaszak@apple.com> | 2011-09-02 15:43:43 +0000 |
| commit | 4c6b8bee2ab087f3b21efa6b638c6848f23b74d7 (patch) | |
| tree | eab36c12e280808823fc6340607a367bca00f96b /lib | |
| parent | 8cec759339f69ff6479e50c13545db3a5337c71a (diff) | |
| download | external_llvm-4c6b8bee2ab087f3b21efa6b638c6848f23b74d7.tar.gz external_llvm-4c6b8bee2ab087f3b21efa6b638c6848f23b74d7.tar.bz2 external_llvm-4c6b8bee2ab087f3b21efa6b638c6848f23b74d7.zip | |
ConstantVector returns arbitrary value for the wrong index.
This fixes PR10813.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139006 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/VMCore/ConstantFold.cpp | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/lib/VMCore/ConstantFold.cpp b/lib/VMCore/ConstantFold.cpp index 47c693b030..458f224575 100644 --- a/lib/VMCore/ConstantFold.cpp +++ b/lib/VMCore/ConstantFold.cpp @@ -761,6 +761,10 @@ Constant *llvm::ConstantFoldExtractElementInstruction(Constant *Val, if (ConstantVector *CVal = dyn_cast<ConstantVector>(Val)) { if (ConstantInt *CIdx = dyn_cast<ConstantInt>(Idx)) { + uint64_t Index = CIdx->getZExtValue(); + if (Index >= CVal->getNumOperands()) + // ee({w,x,y,z}, wrong_value) -> w (an arbitrary value). + return CVal->getOperand(0); return CVal->getOperand(CIdx->getZExtValue()); } else if (isa<UndefValue>(Idx)) { // ee({w,x,y,z}, undef) -> w (an arbitrary value). |