/// EnumerateFunctionLocalMetadataa - Incorporate function-local metadata
/// information reachable from the given MDNode.
void ValueEnumerator::EnumerateFunctionLocalMetadata(const MDNode *N) {
assert(N->isFunctionLocal() && N->getFunction() &&
"EnumerateFunctionLocalMetadata called on non-function-local mdnode!");
// Enumerate the type of this value.
EnumerateType(N->getType());
// Check to see if it's already in!
unsigned &MDValueID = MDValueMap[N];
if (MDValueID) {
// Increment use count.
MDValues[MDValueID-1].second++;
return;
}
MDValues.push_back(std::make_pair(N, 1U));
MDValueID = MDValues.size();
// To incoroporate function-local information visit all function-local
// MDNodes and all function-local values they reference.
for (unsigned i = 0, e = N->getNumOperands(); i != e; ++i)
if (Value *V = N->getOperand(i)) {
if (MDNode *O = dyn_cast<MDNode>(V)) {
if (O->isFunctionLocal() && O->getFunction())
EnumerateFunctionLocalMetadata(O);
} else if (isa<Instruction>(V) || isa<Argument>(V))
EnumerateValue(V);
}
// Also, collect all function-local MDNodes for easy access.
FunctionLocalMDs.push_back(N);
}
void ValueEnumerator::incorporateFunction(const Function &F) {
InstructionCount = 0;
NumModuleValues = Values.size();
NumModuleMDs = MDs.size();
// Adding function arguments to the value table.
for (Function::const_arg_iterator I = F.arg_begin(), E = F.arg_end();
I != E; ++I)
EnumerateValue(I);
FirstFuncConstantID = Values.size();
// Add all function-level constants to the value table.
for (Function::const_iterator BB = F.begin(), E = F.end(); BB != E; ++BB) {
for (BasicBlock::const_iterator I = BB->begin(), E = BB->end(); I!=E; ++I)
for (User::const_op_iterator OI = I->op_begin(), E = I->op_end();
OI != E; ++OI) {
if ((isa<Constant>(*OI) && !isa<GlobalValue>(*OI)) ||
isa<InlineAsm>(*OI))
EnumerateValue(*OI);
}
BasicBlocks.push_back(BB);
ValueMap[BB] = BasicBlocks.size();
}
// Optimize the constant layout.
OptimizeConstants(FirstFuncConstantID, Values.size());
// Add the function's parameter attributes so they are available for use in
// the function's instruction.
EnumerateAttributes(F.getAttributes());
FirstInstID = Values.size();
SmallVector<llvm::LocalAsMetadata *, 8> FnLocalMDVector;
// Add all of the instructions.
for (Function::const_iterator BB = F.begin(), E = F.end(); BB != E; ++BB) {
for (BasicBlock::const_iterator I = BB->begin(), E = BB->end(); I!=E; ++I) {
for (User::const_op_iterator OI = I->op_begin(), E = I->op_end();
OI != E; ++OI) {
if (auto *MD = dyn_cast<llvm::MetadataAsValue>(&*OI))
if (auto *Local = dyn_cast<LocalAsMetadata>(MD->getMetadata()))
// Enumerate metadata after the instructions they might refer to.
FnLocalMDVector.push_back(Local);
}
if (!I->getType()->isVoidTy())
EnumerateValue(I);
}
}
// Add all of the function-local metadata.
for (unsigned i = 0, e = FnLocalMDVector.size(); i != e; ++i)
EnumerateFunctionLocalMetadata(FnLocalMDVector[i]);
}