+// createSingleLoopExtractorPass - This pass extracts one natural loop from the
+// program into a function if it can. This is used by bugpoint.
+//
+Pass *llvm::createSingleLoopExtractorPass() {
+ return new SingleLoopExtractor();
+}
+
+
+// BlockFile - A file which contains a list of blocks that should not be
+// extracted.
+static cl::opt<std::string>
+BlockFile("extract-blocks-file", cl::value_desc("filename"),
+ cl::desc("A file containing list of basic blocks to not extract"),
+ cl::Hidden);
+
+namespace {
+ /// BlockExtractorPass - This pass is used by bugpoint to extract all blocks
+ /// from the module into their own functions except for those specified by the
+ /// BlocksToNotExtract list.
+ class BlockExtractorPass : public ModulePass {
+ void LoadFile(const char *Filename);
+
+ std::vector<BasicBlock*> BlocksToNotExtract;
+ std::vector<std::pair<std::string, std::string> > BlocksToNotExtractByName;
+ public:
+ static char ID; // Pass identification, replacement for typeid
+ explicit BlockExtractorPass(const std::vector<BasicBlock*> &B)
+ : ModulePass(&ID), BlocksToNotExtract(B) {
+ if (!BlockFile.empty())
+ LoadFile(BlockFile.c_str());
+ }
+ BlockExtractorPass() : ModulePass(&ID) {}
+
+ bool runOnModule(Module &M);
+ };
+}
+
+char BlockExtractorPass::ID = 0;
+static RegisterPass<BlockExtractorPass>
+XX("extract-blocks", "Extract Basic Blocks From Module (for bugpoint use)");
+
+// createBlockExtractorPass - This pass extracts all blocks (except those
+// specified in the argument list) from the functions in the module.
+//
+ModulePass *llvm::createBlockExtractorPass(const std::vector<BasicBlock*> &BTNE)
+{
+ return new BlockExtractorPass(BTNE);
+}
+
+void BlockExtractorPass::LoadFile(const char *Filename) {
+ // Load the BlockFile...
+ std::ifstream In(Filename);
+ if (!In.good()) {
+ errs() << "WARNING: BlockExtractor couldn't load file '" << Filename
+ << "'!\n";
+ return;
+ }
+ while (In) {
+ std::string FunctionName, BlockName;
+ In >> FunctionName;
+ In >> BlockName;
+ if (!BlockName.empty())
+ BlocksToNotExtractByName.push_back(
+ std::make_pair(FunctionName, BlockName));
+ }
+}
+
+bool BlockExtractorPass::runOnModule(Module &M) {
+ std::set<BasicBlock*> TranslatedBlocksToNotExtract;
+ for (unsigned i = 0, e = BlocksToNotExtract.size(); i != e; ++i) {
+ BasicBlock *BB = BlocksToNotExtract[i];
+ Function *F = BB->getParent();
+
+ // Map the corresponding function in this module.
+ Function *MF = M.getFunction(F->getName());
+ assert(MF->getFunctionType() == F->getFunctionType() && "Wrong function?");
+
+ // Figure out which index the basic block is in its function.
+ Function::iterator BBI = MF->begin();
+ std::advance(BBI, std::distance(F->begin(), Function::iterator(BB)));
+ TranslatedBlocksToNotExtract.insert(BBI);
+ }
+
+ while (!BlocksToNotExtractByName.empty()) {
+ // There's no way to find BBs by name without looking at every BB inside
+ // every Function. Fortunately, this is always empty except when used by
+ // bugpoint in which case correctness is more important than performance.
+
+ std::string &FuncName = BlocksToNotExtractByName.back().first;
+ std::string &BlockName = BlocksToNotExtractByName.back().second;
+
+ for (Module::iterator FI = M.begin(), FE = M.end(); FI != FE; ++FI) {
+ Function &F = *FI;
+ if (F.getName() != FuncName) continue;
+
+ for (Function::iterator BI = F.begin(), BE = F.end(); BI != BE; ++BI) {
+ BasicBlock &BB = *BI;
+ if (BB.getName() != BlockName) continue;
+
+ TranslatedBlocksToNotExtract.insert(BI);
+ }
+ }
+
+ BlocksToNotExtractByName.pop_back();
+ }
+
+ // Now that we know which blocks to not extract, figure out which ones we WANT
+ // to extract.
+ std::vector<BasicBlock*> BlocksToExtract;
+ for (Module::iterator F = M.begin(), E = M.end(); F != E; ++F)
+ for (Function::iterator BB = F->begin(), E = F->end(); BB != E; ++BB)
+ if (!TranslatedBlocksToNotExtract.count(BB))
+ BlocksToExtract.push_back(BB);
+
+ for (unsigned i = 0, e = BlocksToExtract.size(); i != e; ++i)
+ ExtractBasicBlock(BlocksToExtract[i]);
+
+ return !BlocksToExtract.empty();