-static cl::String InputFilename("", "Specify input bytecode file", 0, "-");
-static cl::String ExtractFunc("func", "Specify function to extract", 0, "main");
-
-struct FunctionExtractorPass : public Pass {
- const char *getPassName() const { return "Function Extractor"; }
-
- bool run(Module &M) {
- // Mark all global variables to be internal
- for (Module::giterator I = M.gbegin(), E = M.gend(); I != E; ++I)
- I->setInternalLinkage(true);
-
- Function *Named = 0;
-
- // Loop over all of the functions in the module, dropping all references in
- // functions that are not the named function.
- for (Module::iterator I = M.begin(), E = M.end(); I != E;)
- // Check to see if this is the named function!
- if (!Named && I->getName() == ExtractFunc) {
- // Yes, it is. Keep track of it...
- Named = I;
-
- // Make sure it's globally accessable...
- Named->setInternalLinkage(false);
-
- // Remove the named function from the module.
- M.getFunctionList().remove(I);
- } else {
- // Nope it's not the named function, delete the body of the function
- I->dropAllReferences();
- ++I;
- }
-
- // All of the functions that still have uses now must be used by global
- // variables or the named function. Loop through them and create a new,
- // external function for the used ones... making all uses point to the new
- // functions.
- std::vector<Function*> NewFunctions;
-
- for (Module::iterator I = M.begin(), E = M.end(); I != E; ++I)
- if (!I->use_empty()) {
- Function *New = new Function(I->getFunctionType(), false, I->getName());
- I->replaceAllUsesWith(New);
- NewFunctions.push_back(New);
- }
-
- // Now the module only has unused functions with their references dropped.
- // Delete them all now!
- M.getFunctionList().clear();
-
- // Re-insert the named function...
- if (Named)
- M.getFunctionList().push_back(Named);
- else
- std::cerr << "Warning: Function '" << ExtractFunc << "' not found!\n";
-
- // Insert all of the function stubs...
- M.getFunctionList().insert(M.end(), NewFunctions.begin(),
- NewFunctions.end());
- return true;
- }
-};
+// InputFilename - The filename to read from.
+static cl::opt<std::string>
+InputFilename(cl::Positional, cl::desc("<input bitcode file>"),
+ cl::init("-"), cl::value_desc("filename"));
+
+static cl::opt<std::string>
+OutputFilename("o", cl::desc("Specify output filename"),
+ cl::value_desc("filename"), cl::init("-"));
+
+static cl::opt<bool>
+Force("f", cl::desc("Overwrite output files"));