[turbofan] Ensure {CheckMaps} is not used accross mutations.

[turbofan] Ensure {CheckMaps} is not used accross mutations.

This makes sure that static guarantees about object maps are not used
accross operations on the effect chain that might trigger a map change.
Such operations are missing the {Operator::kNoWrite} property.

R=bmeurer@chromium.org
TEST=mjsunit/regress/regress-crbug-685506
BUG=chromium:685506
Review-Url: https://codereview.chromium.org/2653273004
Cr-Commit-Position: refs/heads/master@{#42697}
Committed: https://chromium.googlesource.com/v8/v8/+/e752bcc216384e496ee5eaaebd29f34d7182b517

[Michael Starzinger, 2017-01-26 11:44:30]

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

[commit-bot: I haz the power, 2017-01-26 11:44:35]

Dry run: 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, 2017-01-26 12:15:07]

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

[commit-bot: I haz the power, 2017-01-26 12:15:08]

Dry run: This issue passed the CQ dry run.

[Benedikt Meurer, 2017-01-26 12:15:53]

Awesome, thanks. LGTM.

[Michael Starzinger, 2017-01-26 12:55:09]

The CQ bit was checked by mstarzinger@chromium.org

[commit-bot: I haz the power, 2017-01-26 12:55:18]

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, 2017-01-26 12:57:05]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1485435309479060, "parent_rev":
"03e438110607f7b904628bd47f0d0c657943e3b3", "commit_rev":
"e752bcc216384e496ee5eaaebd29f34d7182b517"}

[commit-bot: I haz the power, 2017-01-26 12:57:09]

Description was changed from

==========
[turbofan] Ensure {CheckMaps} is not used accross mutations.

This makes sure that static guarantees about object maps are not used
accross operations on the effect chain that might trigger a map change.
Such operations are missing the {Operator::kNoWrite} property.

R=bmeurer@chromium.org
TEST=mjsunit/regress/regress-crbug-685506
BUG=chromium:685506
==========

to

==========
[turbofan] Ensure {CheckMaps} is not used accross mutations.

This makes sure that static guarantees about object maps are not used
accross operations on the effect chain that might trigger a map change.
Such operations are missing the {Operator::kNoWrite} property.

R=bmeurer@chromium.org
TEST=mjsunit/regress/regress-crbug-685506
BUG=chromium:685506

Review-Url: https://codereview.chromium.org/2653273004
Cr-Commit-Position: refs/heads/master@{#42697}
Committed:
https://chromium.googlesource.com/v8/v8/+/e752bcc216384e496ee5eaaebd29f34d718...
==========

[commit-bot: I haz the power, 2017-01-26 12:57:10]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/v8/v8/+/e752bcc216384e496ee5eaaebd29f34d718...