[turbofan] Disable LoadElimination completely for asm.js.

[turbofan] Disable LoadElimination completely for asm.js.

There's no point in running the LoadElimination on asm.js functions and
it would take serious amount of effort to actually make it correct for
the deprecated parts of the pipeline.

R=jarin@chromium.org
BUG=v8:5308
Committed: https://crrev.com/b471d4ab5cf48c754d4a3c616e932828a48ab4f8
Cr-Commit-Position: refs/heads/master@{#38884}

[Benedikt Meurer, 2016-08-25 05:42:04]

The CQ bit was checked by bmeurer@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2016-08-25 05:42:13]

Dry run: CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[Benedikt Meurer, 2016-08-25 05:45:54]

Hey Jaro,

There's no point in trying to make the LoadElimination work for the deprecated
parts of the pipeline, so I'm just disabling it for now if we see an asm.js
function.
Please take a look.

Thanks,
Benedikt

[Jarin, 2016-08-25 05:55:13]

lgtm, but I would be more comfortable if we kept track of element sizes or
representations in load elimination, and handled the mixed access case properly
(preferably by blowing up).

[Benedikt Meurer, 2016-08-25 05:55:39]

The CQ bit was unchecked by bmeurer@chromium.org

[Benedikt Meurer, 2016-08-25 05:55:42]

The CQ bit was checked by bmeurer@chromium.org

[commit-bot: I haz the power, 2016-08-25 05:55:54]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-08-25 06:14:45]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-08-25 06:15:05]

Description was changed from

==========
[turbofan] Disable LoadElimination completely for asm.js.

There's no point in running the LoadElimination on asm.js functions and
it would take serious amount of effort to actually make it correct for
the deprecated parts of the pipeline.

R=jarin@chromium.org
BUG=v8:5308
==========

to

==========
[turbofan] Disable LoadElimination completely for asm.js.

There's no point in running the LoadElimination on asm.js functions and
it would take serious amount of effort to actually make it correct for
the deprecated parts of the pipeline.

R=jarin@chromium.org
BUG=v8:5308

Committed: https://crrev.com/b471d4ab5cf48c754d4a3c616e932828a48ab4f8
Cr-Commit-Position: refs/heads/master@{#38884}
==========

[commit-bot: I haz the power, 2016-08-25 06:15:05]

Patchset 1 (id:??) landed as
https://crrev.com/b471d4ab5cf48c754d4a3c616e932828a48ab4f8
Cr-Commit-Position: refs/heads/master@{#38884}