Merged r16224 into 3.19 branch.

Merged r16224 into 3.19 branch.

Fix invalid out-of-bounds store in MacroAssembler::Allocate.

BUG=chromium:263515
R=mstarzinger@chromium.org

Committed: http://code.google.com/p/v8/source/detail?r=16423

[Michael Starzinger, 2013-08-29 12:06:49]

LGTM.

[Jakob Kummerow, 2013-08-29 12:08:55]

Paul, this is a backmerge of https://codereview.chromium.org/23242006. It seems
the MIPS changes
(https://codereview.chromium.org/23242006/diff/6001/src/mips/macro-assembler-m...)
don't apply at all, as both the MIPS MacroAssembler::Allocate(...) methods
apparently don't support DOUBLE_ALIGNMENT yet. Is that correct?

[Jakob Kummerow, 2013-08-29 12:10:11]

Committed patchset #1 manually as r16423 (presubmit successful).

[Paul Lind, 2013-08-29 14:43:40]

On 2013/08/29 12:08:55, Jakob wrote:
> Paul, this is a backmerge of https://codereview.chromium.org/23242006. It
seems
> the MIPS changes
>
(https://codereview.chromium.org/23242006/diff/6001/src/mips/macro-assembler-m...)
> don't apply at all, as both the MIPS MacroAssembler::Allocate(...) methods
> apparently don't support DOUBLE_ALIGNMENT yet. Is that correct?

Correct. Unfortunately we missed porting the original DOUBLE_ALIGNMENT change in
r13284, and only got that fixed in the 3.20 timeframe with r16112. For MIPS at
least, r13284 was a performance issue only; we did not back-merge it to older
branches. And therefore we do not need this fix for 3.19.