[turbofan] Workaround for unknown array literal length.

[turbofan] Workaround for unknown array literal length.

This fixes the existing workaround in {BytecodeGraphBuilder} where the
number of elements in an array literal is unknown just from the bytecode
alone and needs to be deduced from the constant elements.

Note that this is just a quick fix to prevent calling the fast-clone
stub for boilerplates that are too big to fit on a regular page. In the
long run we need something more solid here.

R=mvstanton@chromium.org
TEST=mjsunit/regress/regress-crbug-669850
BUG=chromium:669850
Committed: https://crrev.com/f8fec66f0be7489de4673a6271f893b05d11b49c
Cr-Commit-Position: refs/heads/master@{#41420}

[Michael Starzinger, 2016-11-30 15:53:23]

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

[commit-bot: I haz the power, 2016-11-30 15:53:33]

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, 2016-11-30 16:21:39]

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

[commit-bot: I haz the power, 2016-11-30 16:21:40]

Dry run: This issue passed the CQ dry run.

[mvstanton, 2016-12-01 11:49:11]

lgtm

[Michael Starzinger, 2016-12-01 11:59:00]

The CQ bit was checked by mstarzinger@chromium.org

[commit-bot: I haz the power, 2016-12-01 11:59:10]

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, 2016-12-01 12:00:46]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1480593540259530, "parent_rev":
"efab546b284124ae2891d326088175a8fbad4583", "commit_rev":
"f1dfac85f67507993c60b774960b9c577fe281c6"}

[commit-bot: I haz the power, 2016-12-01 12:00:53]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-12-01 12:01:03]

Description was changed from

==========
[turbofan] Workaround for unknown array literal length.

This fixes the existing workaround in {BytecodeGraphBuilder} where the
number of elements in an array literal is unknown just from the bytecode
alone and needs to be deduced from the constant elements.

Note that this is just a quick fix to prevent calling the fast-clone
stub for boilerplates that are too big to fit on a regular page. In the
long run we need something more solid here.

R=mvstanton@chromium.org
TEST=mjsunit/regress/regress-crbug-669850
BUG=chromium:669850
==========

to

==========
[turbofan] Workaround for unknown array literal length.

This fixes the existing workaround in {BytecodeGraphBuilder} where the
number of elements in an array literal is unknown just from the bytecode
alone and needs to be deduced from the constant elements.

Note that this is just a quick fix to prevent calling the fast-clone
stub for boilerplates that are too big to fit on a regular page. In the
long run we need something more solid here.

R=mvstanton@chromium.org
TEST=mjsunit/regress/regress-crbug-669850
BUG=chromium:669850

Committed: https://crrev.com/f8fec66f0be7489de4673a6271f893b05d11b49c
Cr-Commit-Position: refs/heads/master@{#41420}
==========

[commit-bot: I haz the power, 2016-12-01 12:01:04]

Patchset 1 (id:??) landed as
https://crrev.com/f8fec66f0be7489de4673a6271f893b05d11b49c
Cr-Commit-Position: refs/heads/master@{#41420}