Fix failure in mjsunit/wasm/embenchen/lua_binarytrees on 32-bit architectures

Fix failure in mjsunit/wasm/embenchen/lua_binarytrees on 32-bit architectures
that do not support unaligned access.

This test fails because WasmGraphBuilder::BuildCFuncInstruction allocates
space for doubles using StackSlot turbofan operator, but this space is not
guaranteed to be 8 bytes aligned if SP itself is not 8 bytes aligned (which
is the case on 32-bit architectures).

BUG=mjsunit/wasm/embenchen/lua_binarytrees

Committed: https://crrev.com/f6d47317a096cb78d3f359e242df62af789263ab
Cr-Commit-Position: refs/heads/master@{#36693}

[ivica.bogosavljevic, 2016-06-02 10:07:18]

ivica.bogosavljevic@imgtec.com changed reviewers:
+ akos.palfi@imgtec.com, balazs.kilvady@imgtec.com, gergely.kis@imgtec.com,
ilija.pavlovic@imgtec.com, marija.antic@imgtec.com, miran.karic@imgtec.com,
titzer@chromium.org

[ivica.bogosavljevic, 2016-06-02 10:07:19]

PTAL

[Ilija.Pavlovic1, 2016-06-02 10:45:13]

ilija.pavlovic@imgtec.com changed reviewers:
+ Ilija.Pavlovic@imgtec.com

[Ilija.Pavlovic1, 2016-06-02 10:45:13]

lgtm

[Ilija.Pavlovic1, 2016-06-02 10:45:14]

lgtm

[balazs.kilvady, 2016-06-02 11:59:49]

balazs.kilvady@imgtec.com changed reviewers:
+ bmeurer@chromium.org, bradnelson@chromium.org
- Ilija.Pavlovic@imgtec.com

[balazs.kilvady, 2016-06-02 11:59:50]

lgtm, This does need a v8-team review, please take a look.

[Benedikt Meurer, 2016-06-02 13:03:06]

LGTM.

[ivica.bogosavljevic, 2016-06-02 14:22:10]

The CQ bit was checked by ivica.bogosavljevic@imgtec.com to run a CQ dry run

[commit-bot: I haz the power, 2016-06-02 14:22:16]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/2034523003/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/2034523003/1

[commit-bot: I haz the power, 2016-06-02 14:49:28]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2016-06-02 14:49:29]

Dry run: This issue passed the CQ dry run.

[ivica.bogosavljevic, 2016-06-03 07:34:58]

The CQ bit was checked by ivica.bogosavljevic@imgtec.com

[commit-bot: I haz the power, 2016-06-03 07:35:10]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/2034523003/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/2034523003/1

[commit-bot: I haz the power, 2016-06-03 07:39:36]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-06-03 07:42:11]

Description was changed from

==========
Fix failure in mjsunit/wasm/embenchen/lua_binarytrees on 32-bit architectures
that do not support unaligned access.

This test fails because WasmGraphBuilder::BuildCFuncInstruction allocates
space for doubles using StackSlot turbofan operator, but this space is not
guaranteed to be 8 bytes aligned if SP itself is not 8 bytes aligned (which
is the case on 32-bit architectures).

BUG=mjsunit/wasm/embenchen/lua_binarytrees
==========

to

==========
Fix failure in mjsunit/wasm/embenchen/lua_binarytrees on 32-bit architectures
that do not support unaligned access.

This test fails because WasmGraphBuilder::BuildCFuncInstruction allocates
space for doubles using StackSlot turbofan operator, but this space is not
guaranteed to be 8 bytes aligned if SP itself is not 8 bytes aligned (which
is the case on 32-bit architectures).

BUG=mjsunit/wasm/embenchen/lua_binarytrees

Committed: https://crrev.com/f6d47317a096cb78d3f359e242df62af789263ab
Cr-Commit-Position: refs/heads/master@{#36693}
==========

[commit-bot: I haz the power, 2016-06-03 07:42:13]

Patchset 1 (id:??) landed as
https://crrev.com/f6d47317a096cb78d3f359e242df62af789263ab
Cr-Commit-Position: refs/heads/master@{#36693}