C++ (Cpp) iterator::removeDeadConstantUsersの例

コード例 #1

bool IPCP::runOnModule(Module &M) {
  bool Changed = false;
  bool LocalChange = true;

  // FIXME: instead of using smart algorithms, we just iterate until we stop
  // making changes.
  while (LocalChange) {
    LocalChange = false;
    for (Module::iterator I = M.begin(), E = M.end(); I != E; ++I)
      if (!I->isDeclaration()) {
        // Delete any klingons.
        I->removeDeadConstantUsers();
        if (I->hasLocalLinkage())
          LocalChange |= PropagateConstantsIntoArguments(*I);
        Changed |= PropagateConstantReturn(*I);
      }
    Changed |= LocalChange;
  }
  return Changed;
}