mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-15 04:30:12 +00:00
Complete rewrite of BU code to use Tarjan's SCC finding algorithm to drive
the algorithm instead of hand coded depth first iteration git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4694 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner
parent
cf69bb494a
commit
a9c9c0216e
@ -18,19 +18,230 @@ X("budatastructure", "Bottom-up Data Structure Analysis Closure");
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using namespace DS;
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// isCompleteNode - Return true if we know all of the targets of this node, and
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// if the call sites are not external.
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//
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static inline bool isCompleteNode(DSNode *N) {
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if (N->NodeType & DSNode::Incomplete) return false;
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const std::vector<GlobalValue*> &Callees = N->getGlobals();
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for (unsigned i = 0, e = Callees.size(); i != e; ++i)
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if (Callees[i]->isExternal()) {
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GlobalValue &FI = cast<Function>(*Callees[i]);
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if (FI.getName() != "printf" && FI.getName() != "sscanf" &&
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FI.getName() != "fprintf" && FI.getName() != "open" &&
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FI.getName() != "sprintf" && FI.getName() != "fputs")
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return false; // External function found...
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}
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return true; // otherwise ok
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}
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struct CallSiteIterator {
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// FCs are the edges out of the current node are the call site targets...
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std::vector<DSCallSite> *FCs;
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unsigned CallSite;
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unsigned CallSiteEntry;
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CallSiteIterator(std::vector<DSCallSite> &CS) : FCs(&CS) {
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CallSite = 0; CallSiteEntry = 0;
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advanceToNextValid();
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}
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// End iterator ctor...
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CallSiteIterator(std::vector<DSCallSite> &CS, bool) : FCs(&CS) {
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CallSite = FCs->size(); CallSiteEntry = 0;
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}
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void advanceToNextValid() {
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while (CallSite < FCs->size()) {
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if (DSNode *CalleeNode = (*FCs)[CallSite].getCallee().getNode()) {
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if (CallSiteEntry || isCompleteNode(CalleeNode)) {
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const std::vector<GlobalValue*> &Callees = CalleeNode->getGlobals();
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if (CallSiteEntry < Callees.size())
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return;
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}
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CallSiteEntry = 0;
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++CallSite;
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}
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}
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}
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public:
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static CallSiteIterator begin(DSGraph &G) { return G.getAuxFunctionCalls(); }
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static CallSiteIterator end(DSGraph &G) {
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return CallSiteIterator(G.getAuxFunctionCalls(), true);
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}
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static CallSiteIterator begin(std::vector<DSCallSite> &CSs) { return CSs; }
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static CallSiteIterator end(std::vector<DSCallSite> &CSs) {
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return CallSiteIterator(CSs, true);
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}
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bool operator==(const CallSiteIterator &CSI) const {
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return CallSite == CSI.CallSite && CallSiteEntry == CSI.CallSiteEntry;
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}
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bool operator!=(const CallSiteIterator &CSI) const { return !operator==(CSI);}
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unsigned getCallSiteIdx() const { return CallSite; }
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DSCallSite &getCallSite() const { return (*FCs)[CallSite]; }
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Function* operator*() const {
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DSNode *Node = (*FCs)[CallSite].getCallee().getNode();
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return cast<Function>(Node->getGlobals()[CallSiteEntry]);
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}
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CallSiteIterator& operator++() { // Preincrement
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++CallSiteEntry;
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advanceToNextValid();
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return *this;
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}
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CallSiteIterator operator++(int) { // Postincrement
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CallSiteIterator tmp = *this; ++*this; return tmp;
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}
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};
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// run - Calculate the bottom up data structure graphs for each function in the
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// program.
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//
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bool BUDataStructures::run(Module &M) {
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GlobalsGraph = new DSGraph();
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// Simply calculate the graphs for each function...
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Function *MainFunc = M.getMainFunction();
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if (MainFunc)
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calculateReachableGraphs(MainFunc);
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// Calculate the graphs for any functions that are unreachable from main...
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for (Module::iterator I = M.begin(), E = M.end(); I != E; ++I)
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if (!I->isExternal())
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calculateGraph(*I, 0);
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if (!I->isExternal() && DSInfo.find(I) == DSInfo.end()) {
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if (MainFunc)
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std::cerr << "*** Function unreachable from main: "
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<< I->getName() << "\n";
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calculateReachableGraphs(I); // Calculate all graphs...
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}
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return false;
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}
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void BUDataStructures::calculateReachableGraphs(Function *F) {
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std::vector<Function*> Stack;
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std::map<Function*, unsigned> ValMap;
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unsigned NextID = 1;
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calculateGraphs(F, Stack, NextID, ValMap);
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}
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DSGraph &BUDataStructures::getOrCreateGraph(Function *F) {
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// Has the graph already been created?
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DSGraph *&Graph = DSInfo[F];
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if (Graph) return *Graph;
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// Copy the local version into DSInfo...
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Graph = new DSGraph(getAnalysis<LocalDataStructures>().getDSGraph(*F));
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Graph->setGlobalsGraph(GlobalsGraph);
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Graph->setPrintAuxCalls();
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// Start with a copy of the original call sites...
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Graph->getAuxFunctionCalls() = Graph->getFunctionCalls();
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return *Graph;
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}
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unsigned BUDataStructures::calculateGraphs(Function *F,
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std::vector<Function*> &Stack,
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unsigned &NextID,
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std::map<Function*, unsigned> &ValMap) {
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assert(ValMap.find(F) == ValMap.end() && "Shouldn't revisit functions!");
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unsigned Min = NextID++, MyID = Min;
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ValMap[F] = Min;
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Stack.push_back(F);
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if (F->isExternal()) { // sprintf, fprintf, sscanf, etc...
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// No callees!
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Stack.pop_back();
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ValMap[F] = ~0;
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return Min;
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}
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DSGraph &Graph = getOrCreateGraph(F);
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// The edges out of the current node are the call site targets...
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for (CallSiteIterator I = CallSiteIterator::begin(Graph),
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E = CallSiteIterator::end(Graph); I != E; ++I) {
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Function *Callee = *I;
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unsigned M;
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// Have we visited the destination function yet?
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std::map<Function*, unsigned>::iterator It = ValMap.find(Callee);
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if (It == ValMap.end()) // No, visit it now.
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M = calculateGraphs(Callee, Stack, NextID, ValMap);
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else // Yes, get it's number.
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M = It->second;
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if (M < Min) Min = M;
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}
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assert(ValMap[F] == MyID && "SCC construction assumption wrong!");
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if (Min != MyID)
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return Min; // This is part of a larger SCC!
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// If this is a new SCC, process it now.
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if (Stack.back() == F) { // Special case the single "SCC" case here.
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DEBUG(std::cerr << "Visiting single node SCC #: " << MyID << " fn: "
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<< F->getName() << "\n");
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Stack.pop_back();
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DSGraph &G = calculateGraph(*F);
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// Should we revisit the graph?
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if (CallSiteIterator::begin(G) != CallSiteIterator::end(G)) {
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ValMap.erase(F);
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return calculateGraphs(F, Stack, NextID, ValMap);
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} else {
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ValMap[F] = ~0U;
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}
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return MyID;
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} else {
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// SCCFunctions - Keep track of the functions in the current SCC
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//
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std::set<Function*> SCCFunctions;
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Function *NF;
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std::vector<Function*>::iterator FirstInSCC = Stack.end();
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do {
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NF = *--FirstInSCC;
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ValMap[NF] = ~0U;
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SCCFunctions.insert(NF);
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} while (NF != F);
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std::cerr << "Identified SCC #: " << MyID << " of size: "
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<< (Stack.end()-FirstInSCC) << "\n";
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std::vector<Function*>::iterator I = Stack.end();
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do {
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--I;
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/*DEBUG*/(std::cerr << " Fn #" << (Stack.end()-I) << "/"
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<< (Stack.end()-FirstInSCC) << " in SCC: "
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<< (*I)->getName());
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DSGraph &G = getDSGraph(**I);
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std::cerr << " [" << G.getGraphSize() << "+"
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<< G.getAuxFunctionCalls().size() << "] " << std::flush;
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// Inline all graphs into the last (highest numbered) node in the SCC
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calculateSCCGraph(**I, SCCFunctions);
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std::cerr << "after [" << G.getGraphSize() << "+"
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<< G.getAuxFunctionCalls().size() << "]\n";
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} while (I != FirstInSCC);
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std::cerr << "DONE with SCC #: " << MyID << "\n";
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// We never have to revisit "SCC" processed functions...
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// Drop the stuff we don't need from the end of the stack
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Stack.erase(FirstInSCC, Stack.end());
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return MyID;
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}
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return MyID; // == Min
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}
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// releaseMemory - If the pass pipeline is done with this pass, we can release
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// our memory... here...
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//
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@ -46,294 +257,169 @@ void BUDataStructures::releaseMemory() {
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GlobalsGraph = 0;
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}
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DSGraph &BUDataStructures::calculateGraph(Function &F) {
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DSGraph &Graph = getDSGraph(F);
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DEBUG(std::cerr << " [BU] Calculating graph for: " << F.getName() << "\n");
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// Return true if a graph was inlined
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// Can not modify the part of the AuxCallList < FirstResolvableCall.
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//
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bool BUDataStructures::ResolveFunctionCalls(DSGraph &G,
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unsigned &FirstResolvableCall,
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std::map<Function*, DSCallSite> &InProcess,
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unsigned Indent) {
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std::vector<DSCallSite> &FCs = G.getAuxFunctionCalls();
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bool Changed = false;
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// Move our call site list into TempFCs so that inline call sites go into the
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// new call site list and doesn't invalidate our iterators!
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std::vector<DSCallSite> TempFCs;
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std::vector<DSCallSite> &AuxCallsList = Graph.getAuxFunctionCalls();
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TempFCs.swap(AuxCallsList);
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// Loop while there are call sites that we can resolve!
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while (FirstResolvableCall != FCs.size()) {
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DSCallSite Call = FCs[FirstResolvableCall];
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// If the function list is incomplete...
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if (Call.getCallee().getNode()->NodeType & DSNode::Incomplete) {
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// If incomplete, we cannot resolve it, so leave it at the beginning of
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// the call list with the other unresolvable calls...
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++FirstResolvableCall;
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} else {
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// Start inlining all of the functions we can... some may not be
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// inlinable if they are external...
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//
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const std::vector<GlobalValue*> &Callees =
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Call.getCallee().getNode()->getGlobals();
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bool hasExternalTarget = false;
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// Loop over the functions, inlining whatever we can...
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for (unsigned c = 0, e = Callees.size(); c != e; ++c) {
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// Must be a function type, so this cast should succeed unless something
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// really wierd is happening.
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Function &FI = cast<Function>(*Callees[c]);
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if (FI.getName() == "printf" || FI.getName() == "sscanf" ||
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FI.getName() == "fprintf" || FI.getName() == "open" ||
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FI.getName() == "sprintf" || FI.getName() == "fputs") {
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// Ignore
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} else if (FI.isExternal()) {
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// If the function is external, then we cannot resolve this call site!
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hasExternalTarget = true;
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break;
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} else {
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std::map<Function*, DSCallSite>::iterator I =
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InProcess.lower_bound(&FI);
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if (I != InProcess.end() && I->first == &FI) { // Recursion detected?
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// Merge two call sites to eliminate recursion...
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Call.mergeWith(I->second);
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DEBUG(std::cerr << std::string(Indent*2, ' ')
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<< "* Recursion detected for function " << FI.getName()<<"\n");
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} else {
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DEBUG(std::cerr << std::string(Indent*2, ' ')
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<< "Inlining: " << FI.getName() << "\n");
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// Get the data structure graph for the called function, closing it
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// if possible...
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//
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DSGraph &GI = calculateGraph(FI, Indent+1); // Graph to inline
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DEBUG(std::cerr << std::string(Indent*2, ' ')
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<< "Got graph for: " << FI.getName() << "["
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<< GI.getGraphSize() << "+"
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<< GI.getAuxFunctionCalls().size() << "] "
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<< " in: " << G.getFunction().getName() << "["
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<< G.getGraphSize() << "+"
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<< G.getAuxFunctionCalls().size() << "]\n");
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// Keep track of how many call sites are added by the inlining...
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unsigned NumCalls = FCs.size();
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// Resolve the arguments and return value
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G.mergeInGraph(Call, GI, DSGraph::StripAllocaBit |
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DSGraph::DontCloneCallNodes);
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// Added a call site?
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if (FCs.size() != NumCalls) {
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// Otherwise we need to inline the graph. Temporarily add the
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// current function to the InProcess map to be able to handle
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// recursion successfully.
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//
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I = InProcess.insert(I, std::make_pair(&FI, Call));
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// ResolveFunctionCalls - Resolve the function calls that just got
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// inlined...
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//
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Changed |= ResolveFunctionCalls(G, NumCalls, InProcess, Indent+1);
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// Now that we are done processing the inlined graph, remove our
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// cycle detector record...
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//
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//InProcess.erase(I);
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}
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}
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}
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}
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if (hasExternalTarget) {
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// If we cannot resolve this call site...
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++FirstResolvableCall;
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} else {
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Changed = true;
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FCs.erase(FCs.begin()+FirstResolvableCall);
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}
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}
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}
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return Changed;
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}
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DSGraph &BUDataStructures::calculateGraph(Function &F, unsigned Indent) {
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// Make sure this graph has not already been calculated, or that we don't get
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// into an infinite loop with mutually recursive functions.
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//
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DSGraph *&GraphPtr = DSInfo[&F];
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if (GraphPtr) return *GraphPtr;
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// Copy the local version into DSInfo...
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GraphPtr = new DSGraph(getAnalysis<LocalDataStructures>().getDSGraph(F));
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DSGraph &Graph = *GraphPtr;
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Graph.setGlobalsGraph(GlobalsGraph);
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Graph.setPrintAuxCalls();
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// Start resolving calls...
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std::vector<DSCallSite> &FCs = Graph.getAuxFunctionCalls();
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// Start with a copy of the original call sites...
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FCs = Graph.getFunctionCalls();
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DEBUG(std::cerr << std::string(Indent*2, ' ')
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<< "[BU] Calculating graph for: " << F.getName() << "\n");
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bool Changed;
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while (1) {
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unsigned FirstResolvableCall = 0;
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std::map<Function *, DSCallSite> InProcess;
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// Insert a call site for self to handle self recursion...
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std::vector<DSNodeHandle> Args;
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Args.reserve(F.asize());
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for (Function::aiterator I = F.abegin(), E = F.aend(); I != E; ++I)
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if (isPointerType(I->getType()))
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Args.push_back(Graph.getNodeForValue(I));
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InProcess.insert(std::make_pair(&F,
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DSCallSite(*(CallInst*)0, Graph.getRetNode(),(DSNode*)0,Args)));
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Changed = ResolveFunctionCalls(Graph, FirstResolvableCall, InProcess,
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Indent);
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if (Changed) {
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Graph.maskIncompleteMarkers();
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Graph.markIncompleteNodes();
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Graph.removeDeadNodes();
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break;
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} else {
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break;
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}
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}
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#if 0
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bool Inlined;
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do {
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Inlined = false;
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for (unsigned i = 0; i != FCs.size(); ++i) {
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// Copy the call, because inlining graphs may invalidate the FCs vector.
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DSCallSite Call = FCs[i];
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// If the function list is complete...
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if ((Call.getCallee().getNode()->NodeType & DSNode::Incomplete)==0) {
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// Start inlining all of the functions we can... some may not be
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// inlinable if they are external...
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//
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std::vector<GlobalValue*> Callees =
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Call.getCallee().getNode()->getGlobals();
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unsigned OldNumCalls = FCs.size();
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// Loop over the functions, inlining whatever we can...
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for (unsigned c = 0; c != Callees.size(); ++c) {
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// Must be a function type, so this cast MUST succeed.
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Function &FI = cast<Function>(*Callees[c]);
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if (&FI == &F) {
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// Self recursion... simply link up the formal arguments with the
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// actual arguments...
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DEBUG(std::cerr << std::string(Indent*2, ' ')
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<< "[BU] Self Inlining: " << F.getName() << "\n");
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// Handle self recursion by resolving the arguments and return value
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Graph.mergeInGraph(Call, Graph, DSGraph::StripAllocaBit);
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// Erase the entry in the callees vector
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Callees.erase(Callees.begin()+c--);
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} else if (!FI.isExternal()) {
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DEBUG(std::cerr << std::string(Indent*2, ' ')
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<< "[BU] In " << F.getName() << " inlining: "
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<< FI.getName() << "\n");
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// Get the data structure graph for the called function, closing it
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// if possible (which is only impossible in the case of mutual
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// recursion...
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//
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DSGraph &GI = calculateGraph(FI, Indent+1); // Graph to inline
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|
||||
DEBUG(std::cerr << std::string(Indent*2, ' ')
|
||||
<< "[BU] Got graph for " << FI.getName()
|
||||
<< " in: " << F.getName() << "[" << GI.getGraphSize() << "+"
|
||||
<< GI.getAuxFunctionCalls().size() << "]\n");
|
||||
|
||||
// Handle self recursion by resolving the arguments and return value
|
||||
Graph.mergeInGraph(Call, GI, DSGraph::StripAllocaBit |
|
||||
DSGraph::DontCloneCallNodes);
|
||||
|
||||
// Erase the entry in the Callees vector
|
||||
Callees.erase(Callees.begin()+c--);
|
||||
|
||||
} else if (FI.getName() == "printf" || FI.getName() == "sscanf" ||
|
||||
FI.getName() == "fprintf" || FI.getName() == "open" ||
|
||||
FI.getName() == "sprintf" || FI.getName() == "fputs") {
|
||||
// FIXME: These special cases (eg printf) should go away when we can
|
||||
// define functions that take a variable number of arguments.
|
||||
|
||||
// FIXME: at the very least, this should update mod/ref info
|
||||
// Erase the entry in the globals vector
|
||||
Callees.erase(Callees.begin()+c--);
|
||||
}
|
||||
}
|
||||
|
||||
if (Callees.empty()) { // Inlined all of the function calls?
|
||||
// Erase the call if it is resolvable...
|
||||
FCs.erase(FCs.begin()+i--); // Don't skip a the next call...
|
||||
Inlined = true;
|
||||
} else if (Callees.size() !=
|
||||
Call.getCallee().getNode()->getGlobals().size()) {
|
||||
// Was able to inline SOME, but not all of the functions. Construct a
|
||||
// new global node here.
|
||||
//
|
||||
assert(0 && "Unimpl!");
|
||||
Inlined = true;
|
||||
}
|
||||
|
||||
|
||||
#if 0
|
||||
// If we just inlined a function that had call nodes, chances are that
|
||||
// the call nodes are redundant with ones we already have. Eliminate
|
||||
// those call nodes now.
|
||||
//
|
||||
if (FCs.size() >= OldNumCalls)
|
||||
Graph.removeTriviallyDeadNodes();
|
||||
#endif
|
||||
}
|
||||
|
||||
if (FCs.size() > 200) {
|
||||
std::cerr << "Aborted inlining fn: '" << F.getName() << "'!"
|
||||
<< std::endl;
|
||||
Graph.maskIncompleteMarkers();
|
||||
Graph.markIncompleteNodes();
|
||||
Graph.removeDeadNodes();
|
||||
Graph.writeGraphToFile(std::cerr, "crap."+F.getName());
|
||||
exit(1);
|
||||
return Graph;
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
// Recompute the Incomplete markers. If there are any function calls left
|
||||
// now that are complete, we must loop!
|
||||
if (Inlined) {
|
||||
Graph.maskIncompleteMarkers();
|
||||
Graph.markIncompleteNodes();
|
||||
Graph.removeDeadNodes();
|
||||
}
|
||||
// Loop over all of the resolvable call sites
|
||||
unsigned LastCallSiteIdx = ~0U;
|
||||
for (CallSiteIterator I = CallSiteIterator::begin(TempFCs),
|
||||
E = CallSiteIterator::end(TempFCs); I != E; ++I) {
|
||||
// If we skipped over any call sites, they must be unresolvable, copy them
|
||||
// to the real call site list.
|
||||
LastCallSiteIdx++;
|
||||
for (; LastCallSiteIdx < I.getCallSiteIdx(); ++LastCallSiteIdx)
|
||||
AuxCallsList.push_back(TempFCs[LastCallSiteIdx]);
|
||||
LastCallSiteIdx = I.getCallSiteIdx();
|
||||
|
||||
} while (Inlined && !FCs.empty());
|
||||
#endif
|
||||
// Resolve the current call...
|
||||
Function *Callee = *I;
|
||||
DSCallSite &CS = I.getCallSite();
|
||||
|
||||
DEBUG(std::cerr << std::string(Indent*2, ' ')
|
||||
<< "[BU] Done inlining: " << F.getName() << " ["
|
||||
if (Callee->isExternal()) {
|
||||
// Ignore this case, simple varargs functions we cannot stub out!
|
||||
} else if (Callee == &F) {
|
||||
// Self recursion... simply link up the formal arguments with the
|
||||
// actual arguments...
|
||||
DEBUG(std::cerr << " Self Inlining: " << F.getName() << "\n");
|
||||
|
||||
// Handle self recursion by resolving the arguments and return value
|
||||
Graph.mergeInGraph(CS, Graph, 0);
|
||||
|
||||
} else {
|
||||
// Get the data structure graph for the called function.
|
||||
//
|
||||
DSGraph &GI = getDSGraph(*Callee); // Graph to inline
|
||||
|
||||
DEBUG(std::cerr << " Inlining graph for " << Callee->getName()
|
||||
<< " in: " << F.getName() << "[" << GI.getGraphSize() << "+"
|
||||
<< GI.getAuxFunctionCalls().size() << "]\n");
|
||||
|
||||
// Handle self recursion by resolving the arguments and return value
|
||||
Graph.mergeInGraph(CS, GI, DSGraph::StripAllocaBit |
|
||||
DSGraph::DontCloneCallNodes);
|
||||
}
|
||||
}
|
||||
|
||||
// Make sure to catch any leftover unresolvable calls...
|
||||
for (++LastCallSiteIdx; LastCallSiteIdx < TempFCs.size(); ++LastCallSiteIdx)
|
||||
AuxCallsList.push_back(TempFCs[LastCallSiteIdx]);
|
||||
|
||||
TempFCs.clear();
|
||||
|
||||
// Recompute the Incomplete markers. If there are any function calls left
|
||||
// now that are complete, we must loop!
|
||||
Graph.maskIncompleteMarkers();
|
||||
Graph.markIncompleteNodes();
|
||||
Graph.removeDeadNodes();
|
||||
|
||||
DEBUG(std::cerr << " [BU] Done inlining: " << F.getName() << " ["
|
||||
<< Graph.getGraphSize() << "+" << Graph.getAuxFunctionCalls().size()
|
||||
<< "]\n");
|
||||
|
||||
Graph.writeGraphToFile(std::cerr, "bu_" + F.getName());
|
||||
//Graph.writeGraphToFile(std::cerr, "bu_" + F.getName());
|
||||
|
||||
return Graph;
|
||||
}
|
||||
|
||||
|
||||
DSGraph &BUDataStructures::calculateSCCGraph(Function &F,
|
||||
std::set<Function*> &InlinedSCCFunctions) {
|
||||
DSGraph &Graph = getDSGraph(F);
|
||||
DEBUG(std::cerr << " [BU] Calculating SCC graph for: " << F.getName()<<"\n");
|
||||
|
||||
std::vector<DSCallSite> UnresolvableCalls;
|
||||
std::map<Function*, DSCallSite> SCCCallSiteMap;
|
||||
std::vector<DSCallSite> &AuxCallsList = Graph.getAuxFunctionCalls();
|
||||
|
||||
while (1) { // Loop until we run out of resolvable call sites!
|
||||
// Move our call site list into TempFCs so that inline call sites go into
|
||||
// the new call site list and doesn't invalidate our iterators!
|
||||
std::vector<DSCallSite> TempFCs;
|
||||
TempFCs.swap(AuxCallsList);
|
||||
|
||||
// Loop over all of the resolvable call sites
|
||||
unsigned LastCallSiteIdx = ~0U;
|
||||
CallSiteIterator I = CallSiteIterator::begin(TempFCs),
|
||||
E = CallSiteIterator::end(TempFCs);
|
||||
if (I == E) {
|
||||
TempFCs.swap(AuxCallsList);
|
||||
break; // Done when no resolvable call sites exist
|
||||
}
|
||||
|
||||
for (; I != E; ++I) {
|
||||
// If we skipped over any call sites, they must be unresolvable, copy them
|
||||
// to the unresolvable site list.
|
||||
LastCallSiteIdx++;
|
||||
for (; LastCallSiteIdx < I.getCallSiteIdx(); ++LastCallSiteIdx)
|
||||
UnresolvableCalls.push_back(TempFCs[LastCallSiteIdx]);
|
||||
LastCallSiteIdx = I.getCallSiteIdx();
|
||||
|
||||
// Resolve the current call...
|
||||
Function *Callee = *I;
|
||||
DSCallSite &CS = I.getCallSite();
|
||||
|
||||
if (Callee->isExternal()) {
|
||||
// Ignore this case, simple varargs functions we cannot stub out!
|
||||
} else if (Callee == &F) {
|
||||
// Self recursion... simply link up the formal arguments with the
|
||||
// actual arguments...
|
||||
DEBUG(std::cerr << " Self Inlining: " << F.getName() << "\n");
|
||||
|
||||
// Handle self recursion by resolving the arguments and return value
|
||||
Graph.mergeInGraph(CS, Graph, 0);
|
||||
} else if (SCCCallSiteMap.count(Callee)) {
|
||||
// We have already seen a call site in the SCC for this function, just
|
||||
// merge the two call sites together and we are done.
|
||||
SCCCallSiteMap.find(Callee)->second.mergeWith(CS);
|
||||
} else {
|
||||
// Get the data structure graph for the called function.
|
||||
//
|
||||
DSGraph &GI = getDSGraph(*Callee); // Graph to inline
|
||||
|
||||
DEBUG(std::cerr << " Inlining graph for " << Callee->getName()
|
||||
<< " in: " << F.getName() << "[" << GI.getGraphSize() << "+"
|
||||
<< GI.getAuxFunctionCalls().size() << "]\n");
|
||||
|
||||
// Handle self recursion by resolving the arguments and return value
|
||||
Graph.mergeInGraph(CS, GI, DSGraph::StripAllocaBit |
|
||||
DSGraph::DontCloneCallNodes);
|
||||
|
||||
if (InlinedSCCFunctions.count(Callee))
|
||||
SCCCallSiteMap.insert(std::make_pair(Callee, CS));
|
||||
}
|
||||
}
|
||||
|
||||
// Make sure to catch any leftover unresolvable calls...
|
||||
for (++LastCallSiteIdx; LastCallSiteIdx < TempFCs.size(); ++LastCallSiteIdx)
|
||||
UnresolvableCalls.push_back(TempFCs[LastCallSiteIdx]);
|
||||
}
|
||||
|
||||
// Reset the SCCCallSiteMap...
|
||||
SCCCallSiteMap.clear();
|
||||
|
||||
AuxCallsList.insert(AuxCallsList.end(), UnresolvableCalls.begin(),
|
||||
UnresolvableCalls.end());
|
||||
UnresolvableCalls.clear();
|
||||
|
||||
|
||||
// Recompute the Incomplete markers. If there are any function calls left
|
||||
// now that are complete, we must loop!
|
||||
Graph.maskIncompleteMarkers();
|
||||
Graph.markIncompleteNodes();
|
||||
Graph.removeDeadNodes();
|
||||
|
||||
DEBUG(std::cerr << " [BU] Done inlining: " << F.getName() << " ["
|
||||
<< Graph.getGraphSize() << "+" << Graph.getAuxFunctionCalls().size()
|
||||
<< "]\n");
|
||||
|
||||
//Graph.writeGraphToFile(std::cerr, "bu_" + F.getName());
|
||||
|
||||
return Graph;
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user