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* Convert getelementptr/store pairs into a single store
* Convert getelementptr/load pairs into a single load git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@1075 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -438,7 +438,7 @@ static bool PeepholeMallocInst(BasicBlock *BB, BasicBlock::iterator &BI) {
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static bool PeepholeOptimize(BasicBlock *BB, BasicBlock::iterator &BI) {
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Instruction *I = *BI;
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if (I->use_size() == 0) return false;
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if (I->use_size() == 0 && I->getType() != Type::VoidTy) return false;
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if (CastInst *CI = dyn_cast<CastInst>(I)) {
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Value *Src = CI->getOperand(0);
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@ -484,6 +484,31 @@ static bool PeepholeOptimize(BasicBlock *BB, BasicBlock::iterator &BI) {
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} else if (MallocInst *MI = dyn_cast<MallocInst>(I)) {
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if (PeepholeMallocInst(BB, BI)) return true;
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} else if (StoreInst *SI = dyn_cast<StoreInst>(I)) {
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Value *Val = SI->getOperand(0);
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Value *Pointer = SI->getPtrOperand();
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if (GetElementPtrInst *GEP = dyn_cast<GetElementPtrInst>(Pointer)) {
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PRINT_PEEPHOLE2("gep-store:in", GEP, SI);
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ReplaceInstWithInst(BB->getInstList(), BI,
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SI = new StoreInst(Val, GEP->getPtrOperand(),
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GEP->getIndexVec()));
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PRINT_PEEPHOLE1("gep-store:out", SI);
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return true;
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}
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} else if (LoadInst *LI = dyn_cast<LoadInst>(I)) {
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Value *Pointer = LI->getPtrOperand();
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if (GetElementPtrInst *GEP = dyn_cast<GetElementPtrInst>(Pointer)) {
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PRINT_PEEPHOLE2("gep-load:in", GEP, LI);
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ReplaceInstWithInst(BB->getInstList(), BI,
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LI = new LoadInst(GEP->getPtrOperand(),
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GEP->getIndexVec()));
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PRINT_PEEPHOLE1("gep-load:out", LI);
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return true;
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}
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} else if (I->getOpcode() == Instruction::Add &&
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isa<CastInst>(I->getOperand(1))) {
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