[turbofan] Introduce CheckTaggedSigned and CheckTaggedPointer operators.

[turbofan] Introduce CheckTaggedSigned and CheckTaggedPointer operators.

These are used to check for Smi or HeapObject, and we use them
appropriately in JSNativeContextSpecialization, so we don't need
to introduce dependencies on concrete control flow and/or concrete
frame states.

They will be optimized by a proper check elimination reducer,
which will be added in a separate CL.

R=jarin@chromium.org
BUG=v8:4470
Committed: https://crrev.com/99eb5686e9833b95e10d084e6baf294c9e99cf1d
Cr-Commit-Position: refs/heads/master@{#37096}

[Benedikt Meurer, 2016-06-20 09:50:05]

Hey Jaro,

Here's the patch we were cooking.
Please take a look.

Thanks,
Benedikt

[Jarin, 2016-06-20 09:55:47]

lgtm

[Benedikt Meurer, 2016-06-20 09:55:54]

The CQ bit was checked by bmeurer@chromium.org

[commit-bot: I haz the power, 2016-06-20 09:55:56]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/2082523002/20001

[commit-bot: I haz the power, 2016-06-20 09:58:46]

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

[commit-bot: I haz the power, 2016-06-20 09:58:47]

Try jobs failed on following builders:
  v8_win_rel_ng on tryserver.v8 (JOB_FAILED,
http://build.chromium.org/p/tryserver.v8/builders/v8_win_rel_ng/builds/9028)

[Benedikt Meurer, 2016-06-20 10:25:13]

The CQ bit was checked by bmeurer@chromium.org

[Benedikt Meurer, 2016-06-20 10:25:14]

The patchset sent to the CQ was uploaded after l-g-t-m from jarin@chromium.org
Link to the patchset: https://codereview.chromium.org/2082523002/#ps40001
(title: "Fix compile")

[commit-bot: I haz the power, 2016-06-20 10:25:25]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/2082523002/40001

[commit-bot: I haz the power, 2016-06-20 10:46:21]

Committed patchset #3 (id:40001)

[commit-bot: I haz the power, 2016-06-20 10:49:01]

Description was changed from

==========
[turbofan] Introduce CheckTaggedSigned and CheckTaggedPointer operators.

These are used to check for Smi or HeapObject, and we use them
appropriately in JSNativeContextSpecialization, so we don't need
to introduce dependencies on concrete control flow and/or concrete
frame states.

They will be optimized by a proper check elimination reducer,
which will be added in a separate CL.

R=jarin@chromium.org
BUG=v8:4470
==========

to

==========
[turbofan] Introduce CheckTaggedSigned and CheckTaggedPointer operators.

These are used to check for Smi or HeapObject, and we use them
appropriately in JSNativeContextSpecialization, so we don't need
to introduce dependencies on concrete control flow and/or concrete
frame states.

They will be optimized by a proper check elimination reducer,
which will be added in a separate CL.

R=jarin@chromium.org
BUG=v8:4470

Committed: https://crrev.com/99eb5686e9833b95e10d084e6baf294c9e99cf1d
Cr-Commit-Position: refs/heads/master@{#37096}
==========

[commit-bot: I haz the power, 2016-06-20 10:49:02]

Patchset 3 (id:??) landed as
https://crrev.com/99eb5686e9833b95e10d084e6baf294c9e99cf1d
Cr-Commit-Position: refs/heads/master@{#37096}