[turbofan] Allow deopt reasons without source positions.

[turbofan] Allow deopt reasons without source positions.

This allows to pass deoptimization reasons to the profiler without the
requirement of always providing a source position. The absence of deopt
reasons is now communicated via a sentinel as the deopt id value. The
deoptimization reasons recently added to TurboFan are now passed to the
profiler.

R=bmeurer@chromium.org
TEST=cctest/test-cpu-profiler

Committed: https://crrev.com/ca727047837b888b63732d39014d80cae85f7505
Cr-Commit-Position: refs/heads/master@{#37852}

[Michael Starzinger, 2016-07-18 15:10:55]

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

[commit-bot: I haz the power, 2016-07-18 15:10:57]

Dry run: CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[Michael Starzinger, 2016-07-18 15:11:01]

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

[commit-bot: I haz the power, 2016-07-18 15:26:57]

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

[commit-bot: I haz the power, 2016-07-18 15:26:58]

Dry run: Try jobs failed on following builders:
  v8_linux64_gyp_rel_ng on master.tryserver.v8 (JOB_FAILED,
http://build.chromium.org/p/tryserver.v8/builders/v8_linux64_gyp_rel_ng/build...)
  v8_linux64_gyp_rel_ng_triggered on master.tryserver.v8 (JOB_FAILED,
http://build.chromium.org/p/tryserver.v8/builders/v8_linux64_gyp_rel_ng_trigg...)

[Michael Starzinger, 2016-07-18 15:59:22]

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

[commit-bot: I haz the power, 2016-07-18 15:59:29]

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, 2016-07-18 16:29:10]

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

[commit-bot: I haz the power, 2016-07-18 16:29:10]

Dry run: This issue passed the CQ dry run.

[Benedikt Meurer, 2016-07-19 04:08:35]

Awesome, thanks. LGTM.

[Michael Starzinger, 2016-07-19 08:20:22]

The CQ bit was checked by mstarzinger@chromium.org

[commit-bot: I haz the power, 2016-07-19 08:20:29]

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, 2016-07-19 08:22:15]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2016-07-19 08:23:08]

Description was changed from

==========
[turbofan] Allow deopt reasons without source positions.

This allows to pass deoptimization reasons to the profiler without the
requirement of always providing a source position. The absence of deopt
reasons is now communicated via a sentinel as the deopt id value. The
deoptimization reasons recently added to TurboFan are now passed to the
profiler.

R=bmeurer@chromium.org
TEST=cctest/test-cpu-profiler
==========

to

==========
[turbofan] Allow deopt reasons without source positions.

This allows to pass deoptimization reasons to the profiler without the
requirement of always providing a source position. The absence of deopt
reasons is now communicated via a sentinel as the deopt id value. The
deoptimization reasons recently added to TurboFan are now passed to the
profiler.

R=bmeurer@chromium.org
TEST=cctest/test-cpu-profiler

Committed: https://crrev.com/ca727047837b888b63732d39014d80cae85f7505
Cr-Commit-Position: refs/heads/master@{#37852}
==========

[commit-bot: I haz the power, 2016-07-19 08:23:09]

Patchset 2 (id:??) landed as
https://crrev.com/ca727047837b888b63732d39014d80cae85f7505
Cr-Commit-Position: refs/heads/master@{#37852}