RPCS3/llvm
1
0
Fork 0
mirror of https://github.com/RPCS3/llvm.git synced 2025-02-27 22:26:31 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

Return undef value (instead of arbitrary) for wrong or undef index in

Browse Source 
ConstantVector.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139007 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jakub Staszak 2011-09-02 17:01:40 +00:00
parent 4c6b8bee2a
commit 8370d91f1e
1 changed files with 4 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
lib/VMCore/ConstantFold.cpp
View File

@ -763,12 +763,12 @@ Constant *llvm::ConstantFoldExtractElementInstruction(Constant *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);
// ee({w,x,y,z}, wrong_value) -> undef
return UndefValue::get(cast<VectorType>(Val->getType())->getElementType());
return CVal->getOperand(CIdx->getZExtValue());
} else if (isa<UndefValue>(Idx)) {
// ee({w,x,y,z}, undef) -> w (an arbitrary value).
return CVal->getOperand(0);
// ee({w,x,y,z}, undef) -> undef
return UndefValue::get(cast<VectorType>(Val->getType())->getElementType());
}
}
return 0;