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GlobalsModRef: Unify and clean up duplicated pointer analysis code.

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llvm-svn: 201087
This commit is contained in:
Benjamin Kramer 2014-02-10 14:17:30 +00:00
parent f94bdee15e
commit 6f5190be6c
1 changed files with 12 additions and 21 deletions
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33
lib/Analysis/IPA/GlobalsModRef.cpp
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@ -262,30 +262,21 @@ bool GlobalsModRef::AnalyzeUsesOfPointer(Value *V,
} else if (SI->getOperand(1) != OkayStoreDest) {
return true; // Storing the pointer
}
} else if (GetElementPtrInst *GEP = dyn_cast<GetElementPtrInst>(U)) {
if (AnalyzeUsesOfPointer(GEP, Readers, Writers)) return true;
} else if (BitCastInst *BCI = dyn_cast<BitCastInst>(U)) {
if (AnalyzeUsesOfPointer(BCI, Readers, Writers, OkayStoreDest))
} else if (Operator::getOpcode(U) == Instruction::GetElementPtr) {
if (AnalyzeUsesOfPointer(U, Readers, Writers))
return true;
} else if (isFreeCall(U, TLI)) {
Writers.push_back(cast<Instruction>(U)->getParent()->getParent());
} else if (CallInst *CI = dyn_cast<CallInst>(U)) {
} else if (Operator::getOpcode(U) == Instruction::BitCast) {
if (AnalyzeUsesOfPointer(U, Readers, Writers, OkayStoreDest))
return true;
} else if (CallSite CS = 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>(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>(U)) {
if (CE->getOpcode() == Instruction::GetElementPtr ||
CE->getOpcode() == Instruction::BitCast) {
if (AnalyzeUsesOfPointer(CE, Readers, Writers))
return true;
} else {
return true;
if (!CS.isCallee(UI)) {
// Detect calls to free.
if (isFreeCall(U, TLI))
Writers.push_back(CS->getParent()->getParent());
else
return true; // Argument of an unknown call.
}
} else if (ICmpInst *ICI = dyn_cast<ICmpInst>(U)) {
if (!isa<ConstantPointerNull>(ICI->getOperand(1)))