Merge "ART: Speed up HGraph::PopulateIrreducibleRecursive" am: 62358ed
am: a9b3479

* commit 'a9b3479f1c6312a5595c2fdeae2fe6e0ba9686b0':
  ART: Speed up HGraph::PopulateIrreducibleRecursive

Change-Id: Ia62b071c08b3cfd9a20681b0ae86c13b2a7e9a92