diff options
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/Transforms/Scalar/ScalarReplAggregates.cpp | 28 |
1 files changed, 15 insertions, 13 deletions
diff --git a/lib/Transforms/Scalar/ScalarReplAggregates.cpp b/lib/Transforms/Scalar/ScalarReplAggregates.cpp index 9cbe073e29..1bc8a1e3ea 100644 --- a/lib/Transforms/Scalar/ScalarReplAggregates.cpp +++ b/lib/Transforms/Scalar/ScalarReplAggregates.cpp @@ -1431,20 +1431,22 @@ void SROA::ConvertUsesToScalar(Value *Ptr, AllocaInst *NewAI, uint64_t Offset) { if (MemSetInst *MSI = dyn_cast<MemSetInst>(User)) { assert(MSI->getRawDest() == Ptr && "Consistency error!"); unsigned NumBytes = cast<ConstantInt>(MSI->getLength())->getZExtValue(); - unsigned Val = cast<ConstantInt>(MSI->getValue())->getZExtValue(); - - // Compute the value replicated the right number of times. - APInt APVal(NumBytes*8, Val); + if (NumBytes != 0) { + unsigned Val = cast<ConstantInt>(MSI->getValue())->getZExtValue(); + + // Compute the value replicated the right number of times. + APInt APVal(NumBytes*8, Val); - // Splat the value if non-zero. - if (Val) - for (unsigned i = 1; i != NumBytes; ++i) - APVal |= APVal << 8; - - Value *Old = Builder.CreateLoad(NewAI, (NewAI->getName()+".in").c_str()); - Value *New = ConvertScalar_InsertValue(ConstantInt::get(APVal), Old, - Offset, Builder); - Builder.CreateStore(New, NewAI); + // Splat the value if non-zero. + if (Val) + for (unsigned i = 1; i != NumBytes; ++i) + APVal |= APVal << 8; + + Value *Old = Builder.CreateLoad(NewAI, (NewAI->getName()+".in").c_str()); + Value *New = ConvertScalar_InsertValue(ConstantInt::get(APVal), Old, + Offset, Builder); + Builder.CreateStore(New, NewAI); + } MSI->eraseFromParent(); continue; } |