Revert "Add support to load/store byte fields." and "MIPS: Add support to load/store byte fields.".

This reverts commit r17079 and r17085. Will reland after fix.

TBR=jkummerow@chromium.org

Review URL: https://codereview.chromium.org/25679008

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@17099 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Add support to load/store byte fields.

This adds a new Byte representation and support for zero-extended
loads in HLoadNamedField and truncated stores in HStoreNamedField.

R=mvstanton@chromium.org

Committed: https://code.google.com/p/v8/source/detail?r=17079

Review URL: https://codereview.chromium.org/25696004

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@17100 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Fix SmiMove unit test.

TEST=cctest/test-macro-assembler-x64.cc
R=ulan@chromium.org

Review URL: https://codereview.chromium.org/25426006

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@17101 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Make objects embedded in optimized code weak.

This introduces a global weak hash table that maps objects embedded in
optimized code to dependent code lists. Using this table we can deoptimize
optimized code whenever a weak object embedded in the code dies.

BUG=v8:2073
R=hpayer@chromium.org, mstarzinger@chromium.org

Review URL: https://chromiumcodereview.appspot.com/23477061

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@17102 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Disable weak embedded objects in optimized code because of failing test.

BUG=test/mjsunit/json.js fails
R=bmeurer@chromium.org

Review URL: https://chromiumcodereview.appspot.com/25982002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@17103 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Reland "Hydrogenisation of binops"

BUG=
R=mstarzinger@chromium.org

Review URL: https://codereview.chromium.org/25494007

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@17104 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Bump code space size for cctest/DeserializeFromSecondSerialization.

R=mstarzinger@chromium.org
BUG=

Review URL: https://codereview.chromium.org/25996002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@17105 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Calm down GCMole after r17104.

TBR=jkummerow@chromium.org
BUG=

Review URL: https://codereview.chromium.org/25409003

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@17106 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Explicitly include defaults.cc in the shared_library gyp target.

Explicitly include defaults.cc in the shared_library gyp target, otherwise
the whole compilation unit is stripped by the Windows linker, since none of it's
symbols are referenced by any other compilation unit in V8.

BUG=None
R=jkummerow@chromium.org

Review URL: https://codereview.chromium.org/25994002

Patch from Ross McIlroy <rmcilroy@chromium.org>.

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@17107 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
MIPS: Hydrogenisation of binops

Port r17104.

R=olivf@chromium.org

Review URL: https://codereview.chromium.org/26002002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@17108 ce2b1a6d-e550-0410-aec6-3dcde31c8c00