Version 3.25.28.12 (merged r20544, r20645, r20664, r20553)

Fixed flooring division by -1 on ARM and MIPS.

Do not use ranges after range analysis.

x64: Make sure that the upper half of a 64bit register contains 0 for int32 values.

BUG=360611,361608,v8:3259
LOG=Y
R=bmeurer@chromium.org

Review URL: https://codereview.chromium.org/233013004

git-svn-id: https://v8.googlecode.com/svn/branches/3.25@20668 ce2b1a6d-e550-0410-aec6-3dcde31c8c00