+}
+
+// recurseBasicBlock - Visits all neighbours of a block and then tries to
+// calculate the missing edge values.
+void LoaderPass::recurseBasicBlock(const BasicBlock *BB) {
+
+ // break recursion if already visited
+ if (BBisUnvisited.find(BB) == BBisUnvisited.end()) return;
+ BBisUnvisited.erase(BB);
+ if (!BB) return;
+
+ for (succ_const_iterator bbi = succ_begin(BB), bbe = succ_end(BB);
+ bbi != bbe; ++bbi) {
+ recurseBasicBlock(*bbi);
+ }
+ for (const_pred_iterator bbi = pred_begin(BB), bbe = pred_end(BB);
+ bbi != bbe; ++bbi) {
+ recurseBasicBlock(*bbi);
+ }
+
+ Edge tocalc;
+ if (CalculateMissingEdge(BB, tocalc)) {
+ SpanningTree.erase(tocalc);
+ }
+}
+
+void LoaderPass::readEdge(ProfileInfo::Edge e,
+ std::vector<unsigned> &ECs) {
+ if (ReadCount < ECs.size()) {
+ double weight = ECs[ReadCount++];
+ if (weight != ProfileInfoLoader::Uncounted) {
+ // Here the data realm changes from the unsigned of the file to the
+ // double of the ProfileInfo. This conversion is save because we know
+ // that everything thats representable in unsinged is also representable
+ // in double.
+ EdgeInformation[getFunction(e)][e] += (double)weight;
+
+ DEBUG(dbgs() << "--Read Edge Counter for " << e
+ << " (# "<< (ReadCount-1) << "): "
+ << (unsigned)getEdgeWeight(e) << "\n");
+ } else {
+ // This happens only if reading optimal profiling information, not when
+ // reading regular profiling information.
+ SpanningTree.insert(e);
+ }
+ }
+}
+
+bool LoaderPass::runOnModule(Module &M) {
+ ProfileInfoLoader PIL("profile-loader", Filename);
+
+ EdgeInformation.clear();
+ std::vector<unsigned> Counters = PIL.getRawEdgeCounts();
+ if (Counters.size() > 0) {
+ ReadCount = 0;
+ for (Module::iterator F = M.begin(), E = M.end(); F != E; ++F) {
+ if (F->isDeclaration()) continue;
+ DEBUG(dbgs() << "Working on " << F->getName() << "\n");
+ readEdge(getEdge(0,&F->getEntryBlock()), Counters);
+ for (Function::iterator BB = F->begin(), E = F->end(); BB != E; ++BB) {
+ TerminatorInst *TI = BB->getTerminator();
+ for (unsigned s = 0, e = TI->getNumSuccessors(); s != e; ++s) {
+ readEdge(getEdge(BB,TI->getSuccessor(s)), Counters);
+ }
+ }
+ }
+ if (ReadCount != Counters.size()) {
+ errs() << "WARNING: profile information is inconsistent with "
+ << "the current program!\n";
+ }
+ NumEdgesRead = ReadCount;
+ }
+
+ Counters = PIL.getRawOptimalEdgeCounts();
+ if (Counters.size() > 0) {
+ ReadCount = 0;
+ for (Module::iterator F = M.begin(), E = M.end(); F != E; ++F) {
+ if (F->isDeclaration()) continue;
+ DEBUG(dbgs() << "Working on " << F->getName() << "\n");
+ readEdge(getEdge(0,&F->getEntryBlock()), Counters);
+ for (Function::iterator BB = F->begin(), E = F->end(); BB != E; ++BB) {
+ TerminatorInst *TI = BB->getTerminator();
+ if (TI->getNumSuccessors() == 0) {
+ readEdge(getEdge(BB,0), Counters);
+ }
+ for (unsigned s = 0, e = TI->getNumSuccessors(); s != e; ++s) {
+ readEdge(getEdge(BB,TI->getSuccessor(s)), Counters);
+ }
+ }
+ while (SpanningTree.size() > 0) {
+
+ unsigned size = SpanningTree.size();
+
+ BBisUnvisited.clear();
+ for (std::set<Edge>::iterator ei = SpanningTree.begin(),
+ ee = SpanningTree.end(); ei != ee; ++ei) {
+ BBisUnvisited.insert(ei->first);
+ BBisUnvisited.insert(ei->second);
+ }
+ while (BBisUnvisited.size() > 0) {
+ recurseBasicBlock(*BBisUnvisited.begin());
+ }
+
+ if (SpanningTree.size() == size) {
+ DEBUG(dbgs()<<"{");
+ for (std::set<Edge>::iterator ei = SpanningTree.begin(),
+ ee = SpanningTree.end(); ei != ee; ++ei) {
+ DEBUG(dbgs()<< *ei <<",");
+ }
+ assert(0 && "No edge calculated!");
+ }
+
+ }
+ }
+ if (ReadCount != Counters.size()) {
+ errs() << "WARNING: profile information is inconsistent with "
+ << "the current program!\n";
+ }
+ NumEdgesRead = ReadCount;
+ }
+
+ BlockInformation.clear();
+ Counters = PIL.getRawBlockCounts();
+ if (Counters.size() > 0) {
+ ReadCount = 0;
+ for (Module::iterator F = M.begin(), E = M.end(); F != E; ++F) {
+ if (F->isDeclaration()) continue;
+ for (Function::iterator BB = F->begin(), E = F->end(); BB != E; ++BB)
+ if (ReadCount < Counters.size())
+ // Here the data realm changes from the unsigned of the file to the
+ // double of the ProfileInfo. This conversion is save because we know
+ // that everything thats representable in unsinged is also
+ // representable in double.
+ BlockInformation[F][BB] = (double)Counters[ReadCount++];
+ }
+ if (ReadCount != Counters.size()) {
+ errs() << "WARNING: profile information is inconsistent with "
+ << "the current program!\n";
+ }
+ }
+
+ FunctionInformation.clear();
+ Counters = PIL.getRawFunctionCounts();
+ if (Counters.size() > 0) {
+ ReadCount = 0;
+ for (Module::iterator F = M.begin(), E = M.end(); F != E; ++F) {
+ if (F->isDeclaration()) continue;
+ if (ReadCount < Counters.size())
+ // Here the data realm changes from the unsigned of the file to the
+ // double of the ProfileInfo. This conversion is save because we know
+ // that everything thats representable in unsinged is also
+ // representable in double.
+ FunctionInformation[F] = (double)Counters[ReadCount++];
+ }
+ if (ReadCount != Counters.size()) {
+ errs() << "WARNING: profile information is inconsistent with "
+ << "the current program!\n";
+ }
+ }
+