A64: Improve the code sequence generated for deoptimization exits.
A64: Improve the code sequence generated for deoptimization exits.

R=ulan@chromium.org

Review URL: https://codereview.chromium.org/200143002

git-svn-id: b158db1e4b4ab85d4c9e510fdef4b1e8c614b15b@19942 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

UniversalFuture/moosh,UniversalFuture/moosh,UniversalFuture/moosh,UniversalFuture/moosh