am 2475b9d8: am 6a1f4ad1: Merge "Revert "Revert "Revert "Add implicit null and stack checks for x86""""

* commit '2475b9d817692b7af5c76416a2fdb70d19d8d3ff':
  Revert "Revert "Revert "Add implicit null and stack checks for x86"""