bool StripExternals::runOnModule(Module &M) { bool Changed = false; for (Module::iterator I = M.begin(); I != M.end(); ) { if (I->hasAvailableExternallyLinkage()) { assert(!I->isDeclaration()&&"Declarations can't be available_externally"); Changed = true; ++NumFunctions; if (I->use_empty()) { DEBUG(errs() << "Deleting function: " << *I); Module::iterator todelete = I; ++I; todelete->eraseFromParent(); continue; } else { I->deleteBody(); DEBUG(errs() << "Deleted function body: " << *I); } } ++I; } for (Module::global_iterator I = M.global_begin(); I != M.global_end(); ) { if (I->hasAvailableExternallyLinkage()) { assert(!I->isDeclaration()&&"Declarations can't be available_externally"); Changed = true; ++NumVariables; if (I->use_empty()) { DEBUG(errs() << "Deleting global: " << *I); Module::global_iterator todelete = I; ++I; todelete->eraseFromParent(); continue; } else { I->setInitializer(0); I->setLinkage(GlobalValue::ExternalLinkage); DEBUG(errs() << "Deleted initializer: " << *I); } } ++I; } return Changed; }