Add special check for topmost optimized code in deoptimizer verification.

BUG=354843
LOG=N
R=jkummerow@chromium.org

Review URL: https://codereview.chromium.org/208283002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@20167 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Let auto-roll push the lkgr.

BUG=
R=jkummerow@chromium.org

Review URL: https://codereview.chromium.org/205703004

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@20168 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
A64: Now that we have veneers, fix a couple of branches to directly jump to their target.

R=ulan@chromium.org

Review URL: https://codereview.chromium.org/207883002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@20169 ce2b1a6d-e550-0410-aec6-3dcde31c8c00