Method PartiallyUnroll

source/opt/loop_unroller.cpp:1016–1023

Duplicate the |loop| body |factor| number of times while keeping the loop backedge intact.

// Duplicate the |loop| body |factor| number of times while keeping the loop
// backedge intact.
bool LoopUnrollerUtilsImpl::PartiallyUnroll(Loop* loop, size_t factor) {
  if (!Unroll(loop, factor)) return false;
  LinkLastPhisToStart(loop);
  AddBlocksToLoop(loop);
  AddBlocksToFunction(loop->GetMergeBlock());
  RemoveDeadInstructions();
  return true;
}

/*
 * End LoopUtilsImpl.