void FPInferredTargetsAnalysis::findAllFunctionPointersInValue(Value* V, ValueContextPairList& worklist, ValueSet& visited) {
if (!visited.count(V)) {
visited.insert(V);
if (GlobalVariable* G = dyn_cast<GlobalVariable>(V)) {
SDEBUG("soaap.analysis.infoflow.fp.infer", 3, dbgs() << INDENT_1 << "Global var: " << G->getName() << "\n");
// don't look in the llvm.global.annotations array
if (G->getName() != "llvm.global.annotations" && G->hasInitializer()) {
findAllFunctionPointersInValue(G->getInitializer(), worklist, visited);
}
}
else if (ConstantArray* CA = dyn_cast<ConstantArray>(V)) {
SDEBUG("soaap.analysis.infoflow.fp.infer", 3, dbgs() << INDENT_1 << "Constant array, num of operands: " << CA->getNumOperands() << "\n");
for (int i=0; i<CA->getNumOperands(); i++) {
Value* V2 = CA->getOperand(i)->stripInBoundsOffsets();
findAllFunctionPointersInValue(V2, worklist, visited);
}
}
else if (Function* F = dyn_cast<Function>(V)) {
fpTargetsUniv.insert(F);
SDEBUG("soaap.analysis.infoflow.fp.infer", 3, dbgs() << INDENT_1 << "Func: " << F->getName() << "\n");
setBitVector(state[ContextUtils::NO_CONTEXT][V], F);
addToWorklist(V, ContextUtils::NO_CONTEXT, worklist);
}
else if (ConstantStruct* S = dyn_cast<ConstantStruct>(V)) {
SDEBUG("soaap.analysis.infoflow.fp.infer", 3, dbgs() << INDENT_1 << "Struct, num of fields: " << S->getNumOperands() << "\n");
for (int j=0; j<S->getNumOperands(); j++) {
Value* V2 = S->getOperand(j)->stripInBoundsOffsets();
findAllFunctionPointersInValue(V2, worklist, visited);
}
}
}
}
bool PointerAnalysis::test(Value *v, ValueSet &set)
{
if (set.count(v) == 0) {
return false;
}
return true;
}
bool PointerAnalysis::unEqual (const ValueSet &a, const ValueSet &b) {
if (a.size() != b.size())
return true;
for (auto const& e : a)
if (b.count(e) == 0)
return true;
return false;
}
void Preparer::replaceUndefsWithNull(User *I, ValueSet &Replaced) {
if (Replaced.count(I))
return;
Replaced.insert(I);
for (User::op_iterator OI = I->op_begin(); OI != I->op_end(); ++OI) {
Value *V = OI->get();
if (isa<UndefValue>(V) && V->getType()->isPointerTy()) {
OI->set(ConstantPointerNull::get(cast<PointerType>(V->getType())));
}
if (User *I2 = dyn_cast<User>(V)) {
replaceUndefsWithNull(I2, Replaced);
}
}
}
void CodeExtractor::findInputsOutputs(ValueSet &Inputs, ValueSet &Outputs,
const ValueSet &SinkCands) const {
for (BasicBlock *BB : Blocks) {
// If a used value is defined outside the region, it's an input. If an
// instruction is used outside the region, it's an output.
for (Instruction &II : *BB) {
for (User::op_iterator OI = II.op_begin(), OE = II.op_end(); OI != OE;
++OI) {
Value *V = *OI;
if (!SinkCands.count(V) && definedInCaller(Blocks, V))
Inputs.insert(V);
}
for (User *U : II.users())
if (!definedInRegion(Blocks, U)) {
Outputs.insert(&II);
break;
}
}
}
}
