Fix for implicit null test for oat.

This change also cleans up the notion of the callee save method with a
"IsPhony" call. Stack visitors check whether the frame they are on has a
legitimate method with "HasMethod".

Change-Id: I8ac0fdd595c1e764fdc22cfa9c6a394595f7e141
4 files changed
tree: 15e28b57d4500d7daff225f993affabbbd22cefb
  2. build/
  3. src/
  4. test/
  5. tools/