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cache result of operator*

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107978 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Gabor Greif 2010-07-09 15:53:42 +00:00
parent 1f2c0c9ead
commit d7cc5215f1
1 changed files with 14 additions and 11 deletions
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25
lib/Analysis/IPA/GlobalsModRef.cpp
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@ -233,33 +233,34 @@ bool GlobalsModRef::AnalyzeUsesOfPointer(Value *V,
GlobalValue *OkayStoreDest) {
if (!V->getType()->isPointerTy()) return true;
for (Value::use_iterator UI = V->use_begin(), E = V->use_end(); UI != E; ++UI)
if (LoadInst *LI = dyn_cast<LoadInst>(*UI)) {
for (Value::use_iterator UI = V->use_begin(), E=V->use_end(); UI != E; ++UI) {
User *U = *UI;
if (LoadInst *LI = dyn_cast<LoadInst>(U)) {
Readers.push_back(LI->getParent()->getParent());
} else if (StoreInst *SI = dyn_cast<StoreInst>(*UI)) {
} else if (StoreInst *SI = dyn_cast<StoreInst>(U)) {
if (V == SI->getOperand(1)) {
Writers.push_back(SI->getParent()->getParent());
} else if (SI->getOperand(1) != OkayStoreDest) {
return true; // Storing the pointer
}
} else if (GetElementPtrInst *GEP = dyn_cast<GetElementPtrInst>(*UI)) {
} else if (GetElementPtrInst *GEP = dyn_cast<GetElementPtrInst>(U)) {
if (AnalyzeUsesOfPointer(GEP, Readers, Writers)) return true;
} else if (BitCastInst *BCI = dyn_cast<BitCastInst>(*UI)) {
} else if (BitCastInst *BCI = dyn_cast<BitCastInst>(U)) {
if (AnalyzeUsesOfPointer(BCI, Readers, Writers, OkayStoreDest))
return true;
} else if (isFreeCall(*UI)) {
Writers.push_back(cast<Instruction>(*UI)->getParent()->getParent());
} else if (CallInst *CI = dyn_cast<CallInst>(*UI)) {
} else if (isFreeCall(U)) {
Writers.push_back(cast<Instruction>(U)->getParent()->getParent());
} else if (CallInst *CI = dyn_cast<CallInst>(U)) {
// Make sure that this is just the function being called, not that it is
// passing into the function.
for (unsigned i = 0, e = CI->getNumArgOperands(); i != e; ++i)
if (CI->getArgOperand(i) == V) return true;
} else if (InvokeInst *II = dyn_cast<InvokeInst>(*UI)) {
} else if (InvokeInst *II = dyn_cast<InvokeInst>(U)) {
// Make sure that this is just the function being called, not that it is
// passing into the function.
for (unsigned i = 0, e = II->getNumArgOperands(); i != e; ++i)
if (II->getArgOperand(i) == V) return true;
} else if (ConstantExpr *CE = dyn_cast<ConstantExpr>(*UI)) {
} else if (ConstantExpr *CE = dyn_cast<ConstantExpr>(U)) {
if (CE->getOpcode() == Instruction::GetElementPtr ||
CE->getOpcode() == Instruction::BitCast) {
if (AnalyzeUsesOfPointer(CE, Readers, Writers))
@ -267,12 +268,14 @@ bool GlobalsModRef::AnalyzeUsesOfPointer(Value *V,
} else {
return true;
}
} else if (ICmpInst *ICI = dyn_cast<ICmpInst>(*UI)) {
} else if (ICmpInst *ICI = dyn_cast<ICmpInst>(U)) {
if (!isa<ConstantPointerNull>(ICI->getOperand(1)))
return true; // Allow comparison against null.
} else {
return true;
}
}
return false;
}