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clean up algorithm and remove operand order assumptions

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@100780 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Gabor Greif 2010-04-08 16:46:24 +00:00
parent bcf9f00ed5
commit fcf0f082f4
1 changed files with 24 additions and 9 deletions
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33
lib/Analysis/AliasAnalysisEvaluator.cpp
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@ -108,6 +108,11 @@ PrintModRefResults(const char *Msg, bool P, Instruction *I, Value *Ptr,
}
}
static inline bool isInterestingPointer(Value *V) {
return V->getType()->isPointerTy()
&& !isa<ConstantPointerNull>(V);
}
bool AAEval::runOnFunction(Function &F) {
AliasAnalysis &AA = getAnalysis<AliasAnalysis>();
@ -115,21 +120,31 @@ bool AAEval::runOnFunction(Function &F) {
SetVector<CallSite> CallSites;
for (Function::arg_iterator I = F.arg_begin(), E = F.arg_end(); I != E; ++I)
if (I->getType()->isPointerTy()) // Add all pointer arguments
if (I->getType()->isPointerTy()) // Add all pointer arguments.
Pointers.insert(I);
for (inst_iterator I = inst_begin(F), E = inst_end(F); I != E; ++I) {
if (I->getType()->isPointerTy()) // Add all pointer instructions
if (I->getType()->isPointerTy()) // Add all pointer instructions.
Pointers.insert(&*I);
Instruction &Inst = *I;
User::op_iterator OI = Inst.op_begin();
CallSite CS = CallSite::get(&Inst);
if (CS.getInstruction() &&
isa<Function>(CS.getCalledValue()))
++OI; // Skip actual functions for direct function calls.
for (; OI != Inst.op_end(); ++OI)
if ((*OI)->getType()->isPointerTy() && !isa<ConstantPointerNull>(*OI))
Pointers.insert(*OI);
if (CS) {
Value *Callee = CS.getCalledValue();
// Skip actual functions for direct function calls.
if (!isa<Function>(Callee) && isInterestingPointer(Callee))
Pointers.insert(Callee);
// Consider formals.
for (CallSite::arg_iterator AI = CS.arg_begin(), AE = CS.arg_end();
AI != AE; ++AI)
if (isInterestingPointer(*AI))
Pointers.insert(*AI);
} else {
// Consider all operands.
for (Instruction::op_iterator OI = Inst.op_begin(), OE = Inst.op_end();
OI != OE; ++OI)
if (isInterestingPointer(*OI))
Pointers.insert(*OI);
}
if (CS.getInstruction()) CallSites.insert(CS);
}