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Fix isDereferenceablePointer not to try to take the size of an unsized type. 

I'll add a test-case shortly.

llvm-svn: 212687
This commit is contained in:
Hal Finkel 2014-07-10 06:06:11 +00:00
parent 2e42c34d05
commit 66e23f126d
1 changed files with 2 additions and 1 deletions
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3
llvm/lib/IR/Value.cpp
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@ -492,7 +492,8 @@ static bool isDereferenceablePointer(const Value *V, const DataLayout *DL,
if (const BitCastInst* BC = dyn_cast<BitCastInst>(V)) { if (const BitCastInst* BC = dyn_cast<BitCastInst>(V)) {
Type *STy = BC->getSrcTy()->getPointerElementType(), Type *STy = BC->getSrcTy()->getPointerElementType(),
*DTy = BC->getDestTy()->getPointerElementType(); *DTy = BC->getDestTy()->getPointerElementType();
if ((DL->getTypeStoreSize(STy) >= if (STy->isSized() && DTy->isSized() &&
(DL->getTypeStoreSize(STy) >=
DL->getTypeStoreSize(DTy)) && DL->getTypeStoreSize(DTy)) &&
(DL->getABITypeAlignment(STy) >= (DL->getABITypeAlignment(STy) >=
DL->getABITypeAlignment(DTy))) DL->getABITypeAlignment(DTy)))