[turbofan] Add regression tests for LoadElement/Field in diamond.

[turbofan] Add regression tests for LoadElement/Field in diamond.

This introduces appropriate unit tests to ensure that merging of
elements/fields information is correct for diamonds.

BUG=chromium:639210, v8:5266
R=jarin@chromium.org

Committed: https://crrev.com/a124bf773fe1c5140d0a2e8849ffbc2246bc53fe
Cr-Commit-Position: refs/heads/master@{#38881}

[Benedikt Meurer, 2016-08-25 03:36:13]

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

[commit-bot: I haz the power, 2016-08-25 03:36:17]

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 03:37:28]

Hey Jaro,

Some unittests to increase confidence in LoadEliminations correctness (esp.
since asm.js is hopefully going to WASM soonish, so we loose the coverage
there).
Please take a look.

Thanks,
Benedikt

[commit-bot: I haz the power, 2016-08-25 03:56:27]

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

[commit-bot: I haz the power, 2016-08-25 03:56:28]

Dry run: This issue passed the CQ dry run.

[Jarin, 2016-08-25 05:00:55]

lgtm

[Benedikt Meurer, 2016-08-25 05:06:27]

The CQ bit was checked by bmeurer@chromium.org

[commit-bot: I haz the power, 2016-08-25 05:06:37]

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 05:08:59]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-08-25 05:09:33]

Description was changed from

==========
[turbofan] Add regression tests for LoadElement/Field in diamond.

This introduces appropriate unit tests to ensure that merging of
elements/fields information is correct for diamonds.

BUG=chromium:639210,v8:5266
R=jarin@chromium.org
==========

to

==========
[turbofan] Add regression tests for LoadElement/Field in diamond.

This introduces appropriate unit tests to ensure that merging of
elements/fields information is correct for diamonds.

BUG=chromium:639210,v8:5266
R=jarin@chromium.org

Committed: https://crrev.com/a124bf773fe1c5140d0a2e8849ffbc2246bc53fe
Cr-Commit-Position: refs/heads/master@{#38881}
==========

[commit-bot: I haz the power, 2016-08-25 05:09:33]

Patchset 1 (id:??) landed as
https://crrev.com/a124bf773fe1c5140d0a2e8849ffbc2246bc53fe
Cr-Commit-Position: refs/heads/master@{#38881}