177                                AllocaInst *AI,  in isOnlyCopiedFromConstantMemory()  argument
180   if (isOnlyCopiedFromConstantMemory(AA, AI, TheCopy, ToDelete))  in isOnlyCopiedFromConstantMemory()
186 static bool isDereferenceableForAllocaSize(const Value *V, const AllocaInst *AI,  in isDereferenceableForAllocaSize()  argument
188   if (AI->isArrayAllocation())  in isDereferenceableForAllocaSize()
190   uint64_t AllocaSize = DL.getTypeStoreSize(AI->getAllocatedType());  in isDereferenceableForAllocaSize()
193   return isDereferenceableAndAlignedPointer(V, AI->getAlign(),  in isDereferenceableForAllocaSize()
198                                             AllocaInst &AI, DominatorTree &DT) {  in simplifyAllocaArraySize()  argument
200   if (!AI.isArrayAllocation()) {  in simplifyAllocaArraySize()
202     if (AI.getArraySize()->getType()->isIntegerTy(32))  in simplifyAllocaArraySize()
206     return IC.replaceOperand(AI, 0, IC.Builder.getInt32(1));  in simplifyAllocaArraySize()
210   if (const ConstantInt *C = dyn_cast<ConstantInt>(AI.getArraySize())) {  in simplifyAllocaArraySize()
212       Type *NewTy = ArrayType::get(AI.getAllocatedType(), C->getZExtValue());  in simplifyAllocaArraySize()
213       AllocaInst *New = IC.Builder.CreateAlloca(NewTy, AI.getAddressSpace(),  in simplifyAllocaArraySize()
214                                                 nullptr, AI.getName());  in simplifyAllocaArraySize()
215       New->setAlignment(AI.getAlign());  in simplifyAllocaArraySize()
216       New->setUsedWithInAlloca(AI.isUsedWithInAlloca());  in simplifyAllocaArraySize()
218       replaceAllDbgUsesWith(AI, *New, *New, DT);  in simplifyAllocaArraySize()
219       return IC.replaceInstUsesWith(AI, New);  in simplifyAllocaArraySize()
223   if (isa<UndefValue>(AI.getArraySize()))  in simplifyAllocaArraySize()
224     return IC.replaceInstUsesWith(AI, Constant::getNullValue(AI.getType()));  in simplifyAllocaArraySize()
229   Type *PtrIdxTy = IC.getDataLayout().getIndexType(AI.getType());  in simplifyAllocaArraySize()
230   if (AI.getArraySize()->getType() != PtrIdxTy) {  in simplifyAllocaArraySize()
231     Value *V = IC.Builder.CreateIntCast(AI.getArraySize(), PtrIdxTy, false);  in simplifyAllocaArraySize()
232     return IC.replaceOperand(AI, 0, V);  in simplifyAllocaArraySize()
462 Instruction *InstCombinerImpl::visitAllocaInst(AllocaInst &AI) {  in visitAllocaInst()  argument
463   if (auto *I = simplifyAllocaArraySize(*this, AI, DT))  in visitAllocaInst()
466   if (AI.getAllocatedType()->isSized()) {  in visitAllocaInst()
470     if (DL.getTypeAllocSize(AI.getAllocatedType()).getKnownMinValue() == 0) {  in visitAllocaInst()
474       if (AI.isArrayAllocation())  in visitAllocaInst()
475         return replaceOperand(AI, 0,  in visitAllocaInst()
476             ConstantInt::get(AI.getArraySize()->getType(), 1));  in visitAllocaInst()
479       BasicBlock &EntryBlock = AI.getParent()->getParent()->getEntryBlock();  in visitAllocaInst()
481       if (FirstInst != &AI) {  in visitAllocaInst()
489           AI.moveBefore(FirstInst);  in visitAllocaInst()
490           return &AI;  in visitAllocaInst()
496         const Align MaxAlign = std::max(EntryAI->getAlign(), AI.getAlign());  in visitAllocaInst()
498         return replaceInstUsesWith(AI, EntryAI);  in visitAllocaInst()
510   if (MemTransferInst *Copy = isOnlyCopiedFromConstantMemory(AA, &AI, ToDelete)) {  in visitAllocaInst()
512     Align AllocaAlign = AI.getAlign();  in visitAllocaInst()
514       TheSrc, AllocaAlign, DL, &AI, &AC, &DT);  in visitAllocaInst()
516         isDereferenceableForAllocaSize(TheSrc, &AI, DL) &&  in visitAllocaInst()
520       LLVM_DEBUG(dbgs() << "Found alloca equal to global: " << AI << '\n');  in visitAllocaInst()
523       if (AI.getAddressSpace() == SrcAddrSpace) {  in visitAllocaInst()
527         Instruction *NewI = replaceInstUsesWith(AI, TheSrc);  in visitAllocaInst()
533       PointerReplacer PtrReplacer(*this, AI, SrcAddrSpace);  in visitAllocaInst()
546   return visitAllocSite(AI);  in visitAllocaInst()
841     if (AllocaInst *AI = dyn_cast<AllocaInst>(P)) {  in isObjectSizeLessThanOrEq()  local
842       if (!AI->getAllocatedType()->isSized())  in isObjectSizeLessThanOrEq()
845       ConstantInt *CS = dyn_cast<ConstantInt>(AI->getArraySize());  in isObjectSizeLessThanOrEq()
849       TypeSize TS = DL.getTypeAllocSize(AI->getAllocatedType());  in isObjectSizeLessThanOrEq()