Method PostModificationCleanup

source/opt/loop_descriptor.cpp:944–977

Add and remove loops which have been marked for addition and removal to maintain the state of the loop descriptor class.

// Add and remove loops which have been marked for addition and removal to
// maintain the state of the loop descriptor class.
void LoopDescriptor::PostModificationCleanup() {
  LoopContainerType loops_to_remove_;
  for (Loop* loop : loops_) {
    if (loop->IsMarkedForRemoval()) {
      loops_to_remove_.push_back(loop);
      if (loop->HasParent()) {
        loop->GetParent()->RemoveChildLoop(loop);
      }
    }
  }

  for (Loop* loop : loops_to_remove_) {
    loops_.erase(std::find(loops_.begin(), loops_.end(), loop));
    delete loop;
  }

  for (auto& pair : loops_to_add_) {
    Loop* parent = pair.first;
    std::unique_ptr<Loop> loop = std::move(pair.second);

    if (parent) {
      loop->SetParent(nullptr);
      parent->AddNestedLoop(loop.get());

      for (uint32_t block_id : loop->GetBlocks()) {
        parent->AddBasicBlock(block_id);
      }
    }

    loops_.emplace_back(loop.release());
  }

  loops_to_add_.clear();
}

void LoopDescriptor::ClearLoops() {
  for (Loop* loop : loops_) {