Merged r16842 into 3.21 branch.

Make bounds check elimination iterative instead of recursive.

BUG=289706
TBR=titzer@chromium.org

Review URL: https://codereview.chromium.org/26165003

git-svn-id: https://v8.googlecode.com/svn/branches/3.21@17119 ce2b1a6d-e550-0410-aec6-3dcde31c8c00