[turbofan] Teach escape analysis about ConvertTaggedHoleToUndefined.

[turbofan] Teach escape analysis about ConvertTaggedHoleToUndefined.

The EscapeStatusAnalysis didn't know anything about the simplified
operator ConvertTaggedHoleToUndefined, thus leading to a crash. We
now just handled it by pretending that any allocation that goes into
such a node escapes.

BUG=chromium:669451
R=tebbi@chromium.org

Committed: https://crrev.com/d6752d94a8c854accb776f185a5f7d683849355a
Cr-Commit-Position: refs/heads/master@{#41359}

[Benedikt Meurer, 2016-11-29 12:37:14]

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

[commit-bot: I haz the power, 2016-11-29 12:37:21]

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

[Benedikt Meurer, 2016-11-29 12:38:01]

Hey Tobias,

Here's a trivial fix for the ConvertTaggedHoleToUndefined problem in escape
analysis.
Please take a look.

Thanks,
Benedikt

[commit-bot: I haz the power, 2016-11-29 13:04:12]

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

[commit-bot: I haz the power, 2016-11-29 13:04:13]

Dry run: This issue passed the CQ dry run.

[Tobias Tebbi, 2016-11-29 13:11:03]

On 2016/11/29 12:38:01, Benedikt Meurer wrote:
> Hey Tobias,
> 
> Here's a trivial fix for the ConvertTaggedHoleToUndefined problem in escape
> analysis.
> Please take a look.
> 
> Thanks,
> Benedikt

lgtm

[Benedikt Meurer, 2016-11-29 13:11:45]

The CQ bit was checked by bmeurer@chromium.org

[commit-bot: I haz the power, 2016-11-29 13:11:52]

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, 2016-11-29 13:13:29]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1480425105396210, "parent_rev":
"efb130c3e85180bb66610baa1a08aae8557b9a08", "commit_rev":
"47366551dbeb7e035989a409af1e5c7039b2094b"}

[commit-bot: I haz the power, 2016-11-29 13:13:35]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-11-29 13:14:00]

Description was changed from

==========
[turbofan] Teach escape analysis about ConvertTaggedHoleToUndefined.

The EscapeStatusAnalysis didn't know anything about the simplified
operator ConvertTaggedHoleToUndefined, thus leading to a crash. We
now just handled it by pretending that any allocation that goes into
such a node escapes.

BUG=chromium:669451
R=tebbi@chromium.org
==========

to

==========
[turbofan] Teach escape analysis about ConvertTaggedHoleToUndefined.

The EscapeStatusAnalysis didn't know anything about the simplified
operator ConvertTaggedHoleToUndefined, thus leading to a crash. We
now just handled it by pretending that any allocation that goes into
such a node escapes.

BUG=chromium:669451
R=tebbi@chromium.org

Committed: https://crrev.com/d6752d94a8c854accb776f185a5f7d683849355a
Cr-Commit-Position: refs/heads/master@{#41359}
==========

[commit-bot: I haz the power, 2016-11-29 13:14:00]

Patchset 1 (id:??) landed as
https://crrev.com/d6752d94a8c854accb776f185a5f7d683849355a
Cr-Commit-Position: refs/heads/master@{#41359}