Transforms/InstCombine/InstCombineLoadStoreAlloca.cpp

57     if (LoadInst *LI = dyn_cast<LoadInst>(U)) {
59       if (!LI->isSimple()) return false;
283 static Instruction *InstCombineLoadCast(InstCombiner &IC, LoadInst &LI,
285   User *CI = cast<User>(LI.getOperand(0));
322            LI.getType()->isPtrOrPtrVectorTy()) &&
330           IC.Builder->CreateLoad(CastOp, LI.isVolatile(), CI->getName());
331         NewLoad->setAlignment(LI.getAlignment());
332         NewLoad->setAtomic(LI.getOrdering(), LI.getSynchScope());
334         return new BitCastInst(NewLoad, LI.getType());
341 Instruction *InstCombiner::visitLoadInst(LoadInst &LI) {
342   Value *Op = LI.getOperand(0);
347       getOrEnforceKnownAlignment(Op, TD->getPrefTypeAlignment(LI.getType()),TD);
348     unsigned LoadAlign = LI.getAlignment();
350       TD->getABITypeAlignment(LI.getType());
353       LI.setAlignment(KnownAlign);
355       LI.setAlignment(EffectiveLoadAlign);
360     if (Instruction *Res = InstCombineLoadCast(*this, LI, TD))
365   if (!LI.isSimple()) return 0;
370   BasicBlock::iterator BBI = &LI;
371   if (Value *AvailableVal = FindAvailableLoadedValue(Op, LI.getParent(), BBI,6))
372     return ReplaceInstUsesWith(LI, AvailableVal);
383       new StoreInst(UndefValue::get(LI.getType()),
384                     Constant::getNullValue(Op->getType()), &LI);
385       return ReplaceInstUsesWith(LI, UndefValue::get(LI.getType()));
392       (isa<ConstantPointerNull>(Op) && LI.getPointerAddressSpace() == 0)) {
396     new StoreInst(UndefValue::get(LI.getType()),
397                   Constant::getNullValue(Op->getType()), &LI);
398     return ReplaceInstUsesWith(LI, UndefValue::get(LI.getType()));
404       if (Instruction *Res = InstCombineLoadCast(*this, LI, TD))
420       unsigned Align = LI.getAlignment();
435           LI.setOperand(0, SI->getOperand(2));
436           return &LI;
442           LI.setOperand(0, SI->getOperand(1));
443           return &LI;
632     if (LoadInst *LI = dyn_cast<LoadInst>(BBI)) {
633       if (LI == Val && equivalentAddressValues(LI->getOperand(0), Ptr) &&
634           LI->isSimple())