Transforms/Scalar/MemCpyOptimizer.cpp

180   void addMemSet(int64_t OffsetFromFirst, MemSetInst *MSI) {
181     int64_t Size = cast<ConstantInt>(MSI->getLength())->getZExtValue();
182     addRange(OffsetFromFirst, Size, MSI->getDest(), MSI->getDestAlignment(), MSI);
346       MemSetInst *MSI = cast<MemSetInst>(BI);
348       if (MSI->isVolatile() || ByteVal != MSI->getValue() ||
349           !isa<ConstantInt>(MSI->getLength()))
353       Optional<int64_t> Offset = isPointerOffset(StartPtr, MSI->getDest(), DL);
357       Ranges.addMemSet(*Offset, MSI);
699 bool MemCpyOptPass::processMemSet(MemSetInst *MSI, BasicBlock::iterator &BBI) {
702   if (isa<ConstantInt>(MSI->getLength()) && !MSI->isVolatile())
703     if (Instruction *I = tryMergingIntoMemset(MSI, MSI->getDest(),
704                                               MSI->getValue())) {