Merge "Revert "Revert "ART: Do not eagerly type LoopPhi [null, ...]"""
am: d585b2c891

* commit 'd585b2c891fbf559cef4b4a7076183f5c7dc6a18':
  Revert "Revert "ART: Do not eagerly type LoopPhi [null, ...]""