Method PopulateLoopDesc

source/opt/loop_utils.cpp:684–714

Populates |new_loop| descriptor according to |old_loop|'s one.

// Populates |new_loop| descriptor according to |old_loop|'s one.
void LoopUtils::PopulateLoopDesc(
    Loop* new_loop, Loop* old_loop,
    const LoopCloningResult& cloning_result) const {
  for (uint32_t bb_id : old_loop->GetBlocks()) {
    BasicBlock* bb = cloning_result.old_to_new_bb_.at(bb_id);
    new_loop->AddBasicBlock(bb);
  }
  new_loop->SetHeaderBlock(
      cloning_result.old_to_new_bb_.at(old_loop->GetHeaderBlock()->id()));
  if (old_loop->GetLatchBlock())
    new_loop->SetLatchBlock(
        cloning_result.old_to_new_bb_.at(old_loop->GetLatchBlock()->id()));
  if (old_loop->GetContinueBlock())
    new_loop->SetContinueBlock(
        cloning_result.old_to_new_bb_.at(old_loop->GetContinueBlock()->id()));
  if (old_loop->GetMergeBlock()) {
    auto it =
        cloning_result.old_to_new_bb_.find(old_loop->GetMergeBlock()->id());
    BasicBlock* bb = it != cloning_result.old_to_new_bb_.end()
                         ? it->second
                         : old_loop->GetMergeBlock();
    new_loop->SetMergeBlock(bb);
  }
  if (old_loop->GetPreHeaderBlock()) {
    auto it =
        cloning_result.old_to_new_bb_.find(old_loop->GetPreHeaderBlock()->id());
    if (it != cloning_result.old_to_new_bb_.end()) {
      new_loop->SetPreHeaderBlock(it->second);
    }
  }
}

// Class to gather some metrics about a region of interest.
void CodeMetrics::Analyze(const Loop& loop) {