Method AddLoopNest

source/opt/loop_descriptor.cpp:987–1000

Adds a new loop nest to the descriptor set.

// Adds a new loop nest to the descriptor set.
Loop* LoopDescriptor::AddLoopNest(std::unique_ptr<Loop> new_loop) {
  Loop* loop = new_loop.release();
  if (!loop->HasParent()) placeholder_top_loop_.nested_loops_.push_back(loop);
  // Iterate from inner to outer most loop, adding basic block to loop mapping
  // as we go.
  for (Loop& current_loop :
       make_range(iterator::begin(loop), iterator::end(nullptr))) {
    loops_.push_back(&current_loop);
    for (uint32_t bb_id : current_loop.GetBlocks())
      basic_block_to_loop_.insert(std::make_pair(bb_id, &current_loop));
  }

  return loop;
}

void LoopDescriptor::RemoveLoop(Loop* loop) {
  Loop* parent = loop->GetParent() ? loop->GetParent() : &placeholder_top_loop_;