/// Scan the functions in the specified CFG and resync the
/// callgraph with the call sites found in it. This is used after
/// FunctionPasses have potentially munged the callgraph, and can be used after
/// CallGraphSCC passes to verify that they correctly updated the callgraph.
///
/// This function returns true if it devirtualized an existing function call,
/// meaning it turned an indirect call into a direct call. This happens when
/// a function pass like GVN optimizes away stuff feeding the indirect call.
/// This never happens in checking mode.
bool CGPassManager::RefreshCallGraph(const CallGraphSCC &CurSCC, CallGraph &CG,
bool CheckingMode) {
DenseMap<Value*, CallGraphNode*> CallSites;
LLVM_DEBUG(dbgs() << "CGSCCPASSMGR: Refreshing SCC with " << CurSCC.size()
<< " nodes:\n";
for (CallGraphNode *CGN
: CurSCC) CGN->dump(););
/// RefreshCallGraph - Scan the functions in the specified CFG and resync the
/// callgraph with the call sites found in it. This is used after
/// FunctionPasses have potentially munged the callgraph, and can be used after
/// CallGraphSCC passes to verify that they correctly updated the callgraph.
///
/// This function returns true if it devirtualized an existing function call,
/// meaning it turned an indirect call into a direct call. This happens when
/// a function pass like GVN optimizes away stuff feeding the indirect call.
/// This never happens in checking mode.
///
bool CGPassManager::RefreshCallGraph(CallGraphSCC &CurSCC,
CallGraph &CG, bool CheckingMode) {
DenseMap<Value*, CallGraphNode*> CallSites;
DEBUG(dbgs() << "CGSCCPASSMGR: Refreshing SCC with " << CurSCC.size()
<< " nodes:\n";
for (CallGraphSCC::iterator I = CurSCC.begin(), E = CurSCC.end();
I != E; ++I)
(*I)->dump();
);
bool BottomUpPass::runOnSCC(CallGraphSCC &SCC)
{
// NumCalls =0;
// CallGraph CG = getAnalysis<CallGraphWrapperPass>().getCallGraph();
//DataLayoutPass *DLP = getAnalysisIfAvailable<DataLayoutPass>();
//const DataLayout *DL = DLP ? &DLP->getDataLayout() : nullptr;
//const TargetLibraryInfo *TLI = getAnalysisIfAvailable<TargetLibraryInfo>();
SmallPtrSet<Function*, 8> SCCFunctions;
DEBUG(dbgs() << "\nInliner visiting SCC:");
for (CallGraphSCC::iterator I = SCC.begin(), E = SCC.end(); I != E; ++I) {
Function *F = (*I)->getFunction();
if (F) {SCCFunctions.insert(F); NumFuncitons++; }
DEBUG(dbgs() << " " << (F ? F->getName() : "INDIRECTNODE"));
}
// NumCalls = SCCFunctions.size();
DEBUG(dbgs() << "\nSizeof the SCC: "<<SCC.size());
//Collect all the call sites.
SmallVector<std::pair<CallSite, int>, 16> CallSites;
for (CallGraphSCC::iterator I = SCC.begin(), E = SCC.end(); I != E; ++I) {
Function *F = (*I)->getFunction();
if (!F)
{
//Check waht kind of call it is:
// errs()<<"\nCallGRaph node dump -- ";
// (*I)->dump();
continue;
}
for (Function::iterator BB = F->begin(), E = F->end(); BB != E; ++BB)
for (BasicBlock::iterator I = BB->begin(), E = BB->end(); I != E; ++I) {
CallSite CS(cast<Value>(I));
// If this isn't a call, or it is a call to an intrinsic, it can
// never be inlined.
if (!CS || isa<IntrinsicInst>(I))
continue;
// If this is a direct call to an external function, we can never inline
// it. If it is an indirect call, inlining may resolve it to be a
// direct call, so we keep it.
if (CS.getCalledFunction() && CS.getCalledFunction()->isDeclaration())
continue;
CallSites.push_back(std::make_pair(CS, -1));
}
}
DEBUG(dbgs() << ": " << CallSites.size() << " call sites.\n");
NumCalls +=CallSites.size();
}
