HLoadKeyed for Smis optimized for x64

R=verwaest@chromium.org

Review URL: https://codereview.chromium.org/108933002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@18359 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
HStoreNamedField for Smis optimized for x64

R=verwaest@chromium.org

Review URL: https://codereview.chromium.org/108413003

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@18360 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
MIPS: Enable optimization of functions with generic switches.

Port r18347 (64ac25c)

Fix of r18351

BUG=
R=hpayer@chromium.org

Review URL: https://codereview.chromium.org/94103007

Patch from Balazs Kilvady <kilvadyb@homejinni.com>.

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@18361 ce2b1a6d-e550-0410-aec6-3dcde31c8c00