83a4d98554
Tighten some sequences in the write barrier stub. Change-Id: Ib3657b9b582082137d17e86135200444172f428a Reviewed-on: https://dart-review.googlesource.com/60820 Commit-Queue: Ryan Macnak <rmacnak@google.com> Reviewed-by: Siva Annamalai <asiva@google.com>