[heap] Do not clear mark bits of left trimmed old object start.

[heap] Do not clear mark bits of left trimmed old object start.

BUG=chromium:694255
Review-Url: https://codereview.chromium.org/2731363002
Cr-Commit-Position: refs/heads/master@{#43645}
Committed: https://chromium.googlesource.com/v8/v8/+/6517b4477cbf13243caf9a5eeb658f8940ad3c44

[Hannes Payer (out of office), 2017-03-06 19:22:22]

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

[commit-bot: I haz the power, 2017-03-06 19:22:23]

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

[Hannes Payer (out of office), 2017-03-06 19:23:45]

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

[commit-bot: I haz the power, 2017-03-06 19:23:54]

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, 2017-03-06 19:26:23]

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

[commit-bot: I haz the power, 2017-03-06 19:26:24]

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_linux_mipsel_compile_rel on master.tryserver.v8 (JOB_FAILED,
http://build.chromium.org/p/tryserver.v8/builders/v8_linux_mipsel_compile_rel...)

[Hannes Payer (out of office), 2017-03-06 19:38:08]

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

[commit-bot: I haz the power, 2017-03-06 19:38:11]

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, 2017-03-06 19:59:41]

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

[commit-bot: I haz the power, 2017-03-06 19:59:42]

Dry run: Try jobs failed on following builders:
  v8_linux_verify_csa_rel_ng on master.tryserver.v8 (JOB_FAILED,
http://build.chromium.org/p/tryserver.v8/builders/v8_linux_verify_csa_rel_ng/...)
  v8_linux_verify_csa_rel_ng_triggered on master.tryserver.v8 (JOB_FAILED,
http://build.chromium.org/p/tryserver.v8/builders/v8_linux_verify_csa_rel_ng_...)

[Hannes Payer (out of office), 2017-03-06 20:34:50]

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

[commit-bot: I haz the power, 2017-03-06 20:34:53]

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, 2017-03-06 20:54:03]

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

[commit-bot: I haz the power, 2017-03-06 20:54:04]

Dry run: Try jobs failed on following builders:
  v8_linux_verify_csa_rel_ng on master.tryserver.v8 (JOB_FAILED,
http://build.chromium.org/p/tryserver.v8/builders/v8_linux_verify_csa_rel_ng/...)
  v8_linux_verify_csa_rel_ng_triggered on master.tryserver.v8 (JOB_FAILED,
http://build.chromium.org/p/tryserver.v8/builders/v8_linux_verify_csa_rel_ng_...)

[Hannes Payer (out of office), 2017-03-07 12:32:34]

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

[commit-bot: I haz the power, 2017-03-07 12:32:40]

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, 2017-03-07 12:48:50]

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

[commit-bot: I haz the power, 2017-03-07 12:48:51]

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...)

[Hannes Payer (out of office), 2017-03-07 13:00:44]

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

[commit-bot: I haz the power, 2017-03-07 13:00:50]

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, 2017-03-07 13:28:26]

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

[commit-bot: I haz the power, 2017-03-07 13:28:27]

Dry run: This issue passed the CQ dry run.

[ulan, 2017-03-07 14:48:04]

ulan@chromium.org changed reviewers:
+ ulan@chromium.org

[ulan, 2017-03-07 14:48:05]

lgtm

https://codereview.chromium.org/2731363002/diff/130001/src/heap/mark-compact-...
File src/heap/mark-compact-inl.h (right):

https://codereview.chromium.org/2731363002/diff/130001/src/heap/mark-compact-...
src/heap/mark-compact-inl.h:183: // There are two reasons whwy we can get black
or grey fillers:
s/whhy/why

[Hannes Payer (out of office), 2017-03-07 14:49:59]

https://codereview.chromium.org/2731363002/diff/130001/src/heap/mark-compact-...
File src/heap/mark-compact-inl.h (right):

https://codereview.chromium.org/2731363002/diff/130001/src/heap/mark-compact-...
src/heap/mark-compact-inl.h:183: // There are two reasons whwy we can get black
or grey fillers:
On 2017/03/07 14:48:05, ulan wrote:
> s/whhy/why

Done.

[Hannes Payer (out of office), 2017-03-07 14:50:07]

The CQ bit was checked by hpayer@chromium.org

[Hannes Payer (out of office), 2017-03-07 14:50:08]

The patchset sent to the CQ was uploaded after l-g-t-m from ulan@chromium.org
Link to the patchset: https://codereview.chromium.org/2731363002/#ps150001
(title: "comment fix")

[commit-bot: I haz the power, 2017-03-07 14:50:23]

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, 2017-03-07 15:16:49]

CQ is committing da patch.

Bot data: {"patchset_id": 150001, "attempt_start_ts": 1488898207945370,
"parent_rev": "7bc196d2a576f2076a8df9e5eb1edbfeea17afde", "commit_rev":
"6517b4477cbf13243caf9a5eeb658f8940ad3c44"}

[commit-bot: I haz the power, 2017-03-07 15:16:54]

Description was changed from

==========
[heap] Do not clear mark bits of left trimmed old object start.

BUG=chromium:694255
==========

to

==========
[heap] Do not clear mark bits of left trimmed old object start.

BUG=chromium:694255

Review-Url: https://codereview.chromium.org/2731363002
Cr-Commit-Position: refs/heads/master@{#43645}
Committed:
https://chromium.googlesource.com/v8/v8/+/6517b4477cbf13243caf9a5eeb658f8940a...
==========

[commit-bot: I haz the power, 2017-03-07 15:16:55]

Committed patchset #9 (id:150001) as
https://chromium.googlesource.com/v8/v8/+/6517b4477cbf13243caf9a5eeb658f8940a...