[turbofan] Introduce CheckIf simplified operator.

[turbofan] Introduce CheckIf simplified operator.

This adds a new CheckIf operator and changes all direct uses of
DeoptimizeIf and DeoptimizeUnless on the JavaScript level to use
CheckIf (or one of the more concrete check operators) instead.
This way we do not depend on particular frame states, but the
effect/control linearizer will assign an appropriate frame
state instead.

R=jarin@chromium.org
BUG=v8:5141
Committed: https://crrev.com/483291d23082c013efbbe074e1475550ca8c55de
Cr-Commit-Position: refs/heads/master@{#37423}

[Benedikt Meurer, 2016-06-30 08:02:16]

Hey Jaro,

Here's the CheckIf thingy.
Please take a look.

Thanks,
Benedikt

[Jarin, 2016-06-30 08:34:01]

lgtm

[Benedikt Meurer, 2016-06-30 08:36:39]

The CQ bit was checked by bmeurer@chromium.org

[commit-bot: I haz the power, 2016-06-30 08:36:44]

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, 2016-06-30 08:39:56]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-06-30 08:41:24]

Description was changed from

==========
[turbofan] Introduce CheckIf simplified operator.

This adds a new CheckIf operator and changes all direct uses of
DeoptimizeIf and DeoptimizeUnless on the JavaScript level to use
CheckIf (or one of the more concrete check operators) instead.
This way we do not depend on particular frame states, but the
effect/control linearizer will assign an appropriate frame
state instead.

R=jarin@chromium.org
BUG=v8:5141
==========

to

==========
[turbofan] Introduce CheckIf simplified operator.

This adds a new CheckIf operator and changes all direct uses of
DeoptimizeIf and DeoptimizeUnless on the JavaScript level to use
CheckIf (or one of the more concrete check operators) instead.
This way we do not depend on particular frame states, but the
effect/control linearizer will assign an appropriate frame
state instead.

R=jarin@chromium.org
BUG=v8:5141

Committed: https://crrev.com/483291d23082c013efbbe074e1475550ca8c55de
Cr-Commit-Position: refs/heads/master@{#37423}
==========

[commit-bot: I haz the power, 2016-06-30 08:41:25]

Patchset 1 (id:??) landed as
https://crrev.com/483291d23082c013efbbe074e1475550ca8c55de
Cr-Commit-Position: refs/heads/master@{#37423}