[turbofan] Emit explicit checkpoint before operations.

[turbofan] Emit explicit checkpoint before operations.

This is a first step towards explicit checkpoints in the graph. For now
we still use the explicit eager bailout points in the AstGraphBuilder
that are marked by the FrameStateBeforeAndAfter helper. Eventually these
will be implicitly emitted by expression visits having a side-effect.

R=bmeurer@chromium.org
BUG=v8:5021
Committed: https://crrev.com/e065d3eff8595f0197705a7d0e4b0fa8970e38e4
Cr-Commit-Position: refs/heads/master@{#36638}

[Michael Starzinger, 2016-05-30 12:05:10]

Description was changed from

==========
[turbofan] Emit explicit checkpoint before operations.

This is a first step towards explicit checkpoints in the graph. For now
we still use the explicit eager bailout points in the AstGraphBuilder
that are marked by the FrameStateBeforeAndAfter helper. Eventually these
will be implicitly emitted by expression visits having a side-effect.

R=
BUG=v8:5021
==========

to

==========
[turbofan] Emit explicit checkpoint before operations.

This is a first step towards explicit checkpoints in the graph. For now
we still use the explicit eager bailout points in the AstGraphBuilder
that are marked by the FrameStateBeforeAndAfter helper. Eventually these
will be implicitly emitted by expression visits having a side-effect.

R=bmeurer@chromium.org
BUG=v8:5021
==========

[Michael Starzinger, 2016-05-30 12:05:10]

mstarzinger@chromium.org changed reviewers:
+ bmeurer@chromium.org

[Michael Starzinger, 2016-06-01 10:34:45]

PTAL. This should be ready for prime time by now.

[Benedikt Meurer, 2016-06-01 10:42:49]

lgtm

[Michael Starzinger, 2016-06-01 10:45:09]

The CQ bit was checked by mstarzinger@chromium.org

[commit-bot: I haz the power, 2016-06-01 10:45:16]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/2018403002/50001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/2018403002/50001

[commit-bot: I haz the power, 2016-06-01 10:47:44]

Description was changed from

==========
[turbofan] Emit explicit checkpoint before operations.

This is a first step towards explicit checkpoints in the graph. For now
we still use the explicit eager bailout points in the AstGraphBuilder
that are marked by the FrameStateBeforeAndAfter helper. Eventually these
will be implicitly emitted by expression visits having a side-effect.

R=bmeurer@chromium.org
BUG=v8:5021
==========

to

==========
[turbofan] Emit explicit checkpoint before operations.

This is a first step towards explicit checkpoints in the graph. For now
we still use the explicit eager bailout points in the AstGraphBuilder
that are marked by the FrameStateBeforeAndAfter helper. Eventually these
will be implicitly emitted by expression visits having a side-effect.

R=bmeurer@chromium.org
BUG=v8:5021
==========

[commit-bot: I haz the power, 2016-06-01 10:47:45]

Committed patchset #4 (id:50001)

[commit-bot: I haz the power, 2016-06-01 10:48:43]

Description was changed from

==========
[turbofan] Emit explicit checkpoint before operations.

This is a first step towards explicit checkpoints in the graph. For now
we still use the explicit eager bailout points in the AstGraphBuilder
that are marked by the FrameStateBeforeAndAfter helper. Eventually these
will be implicitly emitted by expression visits having a side-effect.

R=bmeurer@chromium.org
BUG=v8:5021
==========

to

==========
[turbofan] Emit explicit checkpoint before operations.

This is a first step towards explicit checkpoints in the graph. For now
we still use the explicit eager bailout points in the AstGraphBuilder
that are marked by the FrameStateBeforeAndAfter helper. Eventually these
will be implicitly emitted by expression visits having a side-effect.

R=bmeurer@chromium.org
BUG=v8:5021

Committed: https://crrev.com/e065d3eff8595f0197705a7d0e4b0fa8970e38e4
Cr-Commit-Position: refs/heads/master@{#36638}
==========

[commit-bot: I haz the power, 2016-06-01 10:48:44]

Patchset 4 (id:??) landed as
https://crrev.com/e065d3eff8595f0197705a7d0e4b0fa8970e38e4
Cr-Commit-Position: refs/heads/master@{#36638}