[turbofan] Introduce TruncateTaggedToBit operator for ToBoolean truncation.

[turbofan] Introduce TruncateTaggedToBit operator for ToBoolean truncation.

Add a dedicated simplified operator to inline the general case for the
ToBoolean conversion. In a follow up CL we will also use the ToBoolean
hints gathered by the baseline compiler.

CQ_INCLUDE_TRYBOTS=master.tryserver.v8:v8_linux_arm64_gc_stress_dbg
R=jarin@chromium.org
BUG=v8:5267
Committed: https://crrev.com/8c50b51ab3d21efcd2f6900d83962159f21e1590
Committed: https://crrev.com/7954b3f8fa6a9fc6c884953d2615dea3018f52be
Cr-Original-Commit-Position: refs/heads/master@{#37882}
Cr-Commit-Position: refs/heads/master@{#39420}

[Benedikt Meurer, 2016-07-20 04:19:54]

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

[commit-bot: I haz the power, 2016-07-20 04:19:56]

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, 2016-07-20 04:37:45]

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

[commit-bot: I haz the power, 2016-07-20 04:37:45]

Dry run: Try jobs failed on following builders:
  v8_linux_dbg_ng on master.tryserver.v8 (JOB_FAILED,
http://build.chromium.org/p/tryserver.v8/builders/v8_linux_dbg_ng/builds/9333)
  v8_linux_dbg_ng_triggered on master.tryserver.v8 (JOB_FAILED,
http://build.chromium.org/p/tryserver.v8/builders/v8_linux_dbg_ng_triggered/b...)

[Benedikt Meurer, 2016-07-20 05:29:32]

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

[commit-bot: I haz the power, 2016-07-20 05:29:35]

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, 2016-07-20 06:02:39]

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

[commit-bot: I haz the power, 2016-07-20 06:02:41]

Dry run: This issue passed the CQ dry run.

[Benedikt Meurer, 2016-07-20 06:17:26]

Description was changed from

==========
[WIP] Introduce TruncateTaggedToBit
==========

to

==========
[turbofan] Introduce TruncateTaggedToBit operator for ToBoolean truncation.

Add a dedicated simplified operator to inline the general case for the
ToBoolean conversion. In a follow up CL we will also use the ToBoolean
hints gathered by the baseline compiler.
==========

[Benedikt Meurer, 2016-07-20 06:17:26]

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

[Benedikt Meurer, 2016-07-20 06:17:56]

Hey Jaro,

Here's a first step to ToBoolean optimization.
Please take a look.

Thanks,
Benedikt

[Jarin, 2016-07-20 06:33:25]

lgtm

[Benedikt Meurer, 2016-07-20 06:43:01]

The CQ bit was checked by bmeurer@chromium.org

[commit-bot: I haz the power, 2016-07-20 06:43:05]

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, 2016-07-20 06:45:46]

Description was changed from

==========
[turbofan] Introduce TruncateTaggedToBit operator for ToBoolean truncation.

Add a dedicated simplified operator to inline the general case for the
ToBoolean conversion. In a follow up CL we will also use the ToBoolean
hints gathered by the baseline compiler.
==========

to

==========
[turbofan] Introduce TruncateTaggedToBit operator for ToBoolean truncation.

Add a dedicated simplified operator to inline the general case for the
ToBoolean conversion. In a follow up CL we will also use the ToBoolean
hints gathered by the baseline compiler.
==========

[commit-bot: I haz the power, 2016-07-20 06:45:47]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2016-07-20 06:49:29]

Description was changed from

==========
[turbofan] Introduce TruncateTaggedToBit operator for ToBoolean truncation.

Add a dedicated simplified operator to inline the general case for the
ToBoolean conversion. In a follow up CL we will also use the ToBoolean
hints gathered by the baseline compiler.
==========

to

==========
[turbofan] Introduce TruncateTaggedToBit operator for ToBoolean truncation.

Add a dedicated simplified operator to inline the general case for the
ToBoolean conversion. In a follow up CL we will also use the ToBoolean
hints gathered by the baseline compiler.

Committed: https://crrev.com/8c50b51ab3d21efcd2f6900d83962159f21e1590
Cr-Commit-Position: refs/heads/master@{#37882}
==========

[commit-bot: I haz the power, 2016-07-20 06:49:30]

Patchset 2 (id:??) landed as
https://crrev.com/8c50b51ab3d21efcd2f6900d83962159f21e1590
Cr-Commit-Position: refs/heads/master@{#37882}

[Michael Achenbach, 2016-07-20 10:08:05]

This broke arm64 gc stress:
https://build.chromium.org/p/client.v8.ports/builders/V8%20Linux%20-%20arm64%...

Fails reliably.

[Benedikt Meurer, 2016-07-20 10:16:45]

A revert of this CL (patchset #2 id:20001) has been created in
https://codereview.chromium.org/2170433002/ by bmeurer@chromium.org.

The reason for reverting is: Breaks arm64 gc stress:
https://build.chromium.org/p/client.v8.ports/builders/V8%20Linux%20-%20arm64%....

[Benedikt Meurer, 2016-09-14 11:47:39]

Description was changed from

==========
[turbofan] Introduce TruncateTaggedToBit operator for ToBoolean truncation.

Add a dedicated simplified operator to inline the general case for the
ToBoolean conversion. In a follow up CL we will also use the ToBoolean
hints gathered by the baseline compiler.

Committed: https://crrev.com/8c50b51ab3d21efcd2f6900d83962159f21e1590
Cr-Commit-Position: refs/heads/master@{#37882}
==========

to

==========
[turbofan] Introduce TruncateTaggedToBit operator for ToBoolean truncation.

Add a dedicated simplified operator to inline the general case for the
ToBoolean conversion. In a follow up CL we will also use the ToBoolean
hints gathered by the baseline compiler.

CQ_INCLUDE_TRYBOTS=master.tryserver.v8:v8_linux_arm64_gc_stress_dbg
R=jarin@chromium.org
BUG=v8:5267

Committed: https://crrev.com/8c50b51ab3d21efcd2f6900d83962159f21e1590
Cr-Commit-Position: refs/heads/master@{#37882}
==========

[Benedikt Meurer, 2016-09-14 11:52:36]

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

[commit-bot: I haz the power, 2016-09-14 11:52:46]

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, 2016-09-14 12:12:25]

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

[commit-bot: I haz the power, 2016-09-14 12:12:26]

Dry run: Try jobs failed on following builders:
  v8_linux64_asan_rel_ng on master.tryserver.v8 (JOB_FAILED,
http://build.chromium.org/p/tryserver.v8/builders/v8_linux64_asan_rel_ng/buil...)
  v8_linux64_asan_rel_ng_triggered on master.tryserver.v8 (JOB_FAILED,
http://build.chromium.org/p/tryserver.v8/builders/v8_linux64_asan_rel_ng_trig...)
  v8_linux64_avx2_rel_ng on master.tryserver.v8 (JOB_FAILED,
http://build.chromium.org/p/tryserver.v8/builders/v8_linux64_avx2_rel_ng/buil...)
  v8_linux64_avx2_rel_ng_triggered on master.tryserver.v8 (JOB_FAILED,
http://build.chromium.org/p/tryserver.v8/builders/v8_linux64_avx2_rel_ng_trig...)

[Benedikt Meurer, 2016-09-14 12:26:38]

The CQ bit was checked by bmeurer@chromium.org

[Benedikt Meurer, 2016-09-14 12:26:39]

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/2167593002/#ps60001
(title: "Fix remaining bugs.")

[commit-bot: I haz the power, 2016-09-14 12:26:42]

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, 2016-09-14 13:12:16]

Description was changed from

==========
[turbofan] Introduce TruncateTaggedToBit operator for ToBoolean truncation.

Add a dedicated simplified operator to inline the general case for the
ToBoolean conversion. In a follow up CL we will also use the ToBoolean
hints gathered by the baseline compiler.

CQ_INCLUDE_TRYBOTS=master.tryserver.v8:v8_linux_arm64_gc_stress_dbg
R=jarin@chromium.org
BUG=v8:5267

Committed: https://crrev.com/8c50b51ab3d21efcd2f6900d83962159f21e1590
Cr-Commit-Position: refs/heads/master@{#37882}
==========

to

==========
[turbofan] Introduce TruncateTaggedToBit operator for ToBoolean truncation.

Add a dedicated simplified operator to inline the general case for the
ToBoolean conversion. In a follow up CL we will also use the ToBoolean
hints gathered by the baseline compiler.

CQ_INCLUDE_TRYBOTS=master.tryserver.v8:v8_linux_arm64_gc_stress_dbg
R=jarin@chromium.org
BUG=v8:5267

Committed: https://crrev.com/8c50b51ab3d21efcd2f6900d83962159f21e1590
Cr-Commit-Position: refs/heads/master@{#37882}
==========

[commit-bot: I haz the power, 2016-09-14 13:12:17]

Committed patchset #4 (id:60001)

[commit-bot: I haz the power, 2016-09-14 13:12:35]

Description was changed from

==========
[turbofan] Introduce TruncateTaggedToBit operator for ToBoolean truncation.

Add a dedicated simplified operator to inline the general case for the
ToBoolean conversion. In a follow up CL we will also use the ToBoolean
hints gathered by the baseline compiler.

CQ_INCLUDE_TRYBOTS=master.tryserver.v8:v8_linux_arm64_gc_stress_dbg
R=jarin@chromium.org
BUG=v8:5267

Committed: https://crrev.com/8c50b51ab3d21efcd2f6900d83962159f21e1590
Cr-Commit-Position: refs/heads/master@{#37882}
==========

to

==========
[turbofan] Introduce TruncateTaggedToBit operator for ToBoolean truncation.

Add a dedicated simplified operator to inline the general case for the
ToBoolean conversion. In a follow up CL we will also use the ToBoolean
hints gathered by the baseline compiler.

CQ_INCLUDE_TRYBOTS=master.tryserver.v8:v8_linux_arm64_gc_stress_dbg
R=jarin@chromium.org
BUG=v8:5267

Committed: https://crrev.com/8c50b51ab3d21efcd2f6900d83962159f21e1590
Committed: https://crrev.com/7954b3f8fa6a9fc6c884953d2615dea3018f52be
Cr-Original-Commit-Position: refs/heads/master@{#37882}
Cr-Commit-Position: refs/heads/master@{#39420}
==========

[commit-bot: I haz the power, 2016-09-14 13:12:36]

Patchset 4 (id:??) landed as
https://crrev.com/7954b3f8fa6a9fc6c884953d2615dea3018f52be
Cr-Commit-Position: refs/heads/master@{#39420}