[turbofan] Reland of `Add alignment parameter to StackSlot operator`

[turbofan] Reland of `Add alignment parameter to StackSlot operator`

Reland d8bfdb7a998adadc56aa5705a5998e75ceae7675

Original commit message:
If alignment parameter is set, the memory returned by the
StackSlot operator will be aligned according to the parameter.

The implementation goes like this. If alignment parameter is set
we allocate a bit more memory than actually needed and so we
can move the beginning of the StackSlot in order to have it aligned.

BUG=

Review-Url: https://codereview.chromium.org/2874713003
Cr-Commit-Position: refs/heads/master@{#45339}
Committed: https://chromium.googlesource.com/v8/v8/+/4a5adb43accbdf38baa81915871470890cfe1248

[ivica.bogosavljevic, 2017-05-11 10:59:12]

ivica.bogosavljevic@imgtec.com changed reviewers:
+ ahaas@chromium.org, bmeurer@chromium.org, clemensh@chromium.org,
titzer@chromium.org

[ivica.bogosavljevic, 2017-05-11 10:59:13]

The original CL got reverted because of the failure in Control Flow Integrity
buildbots
https://build.chromium.org/p/client.v8/builders/V8%20Linux64%20-%20cfi/builds...

The new CL fixes this issue.

PTAL

[Clemens Hammacher, 2017-05-11 11:08:16]

lgtm

[ahaas, 2017-05-11 11:15:55]

lgtm

[ivica.bogosavljevic, 2017-05-11 11:26:30]

The CQ bit was checked by ivica.bogosavljevic@imgtec.com to run a CQ dry run

[commit-bot: I haz the power, 2017-05-11 11:26:47]

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, 2017-05-11 12:00:00]

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

[commit-bot: I haz the power, 2017-05-11 12:00:01]

Dry run: This issue passed the CQ dry run.

[ivica.bogosavljevic, 2017-05-11 12:06:35]

The CQ bit was checked by ivica.bogosavljevic@imgtec.com

[commit-bot: I haz the power, 2017-05-11 12:06:38]

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, 2017-05-11 12:09:28]

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

[commit-bot: I haz the power, 2017-05-11 12:09:29]

Try jobs failed on following builders:
  v8_presubmit on master.tryserver.v8 (JOB_FAILED,
http://build.chromium.org/p/tryserver.v8/builders/v8_presubmit/builds/40882)

[ivica.bogosavljevic, 2017-05-11 12:54:05]

I need lgtm from the owner of the compiler directory

[ivica.bogosavljevic, 2017-05-16 07:45:23]

ping

[Benedikt Meurer, 2017-05-16 08:27:59]

LGTM (rubber-stamped)

[ivica.bogosavljevic, 2017-05-16 11:57:03]

The CQ bit was checked by ivica.bogosavljevic@imgtec.com

[commit-bot: I haz the power, 2017-05-16 11:57:14]

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, 2017-05-16 12:27:57]

CQ is committing da patch.

Bot data: {"patchset_id": 20001, "attempt_start_ts": 1494935823548930,
"parent_rev": "b96e8a60e208d94420e81a800401f949d2763f3e", "commit_rev":
"4a5adb43accbdf38baa81915871470890cfe1248"}

[commit-bot: I haz the power, 2017-05-16 12:28:05]

Description was changed from

==========
[turbofan] Reland of `Add alignment parameter to StackSlot operator`

Reland d8bfdb7a998adadc56aa5705a5998e75ceae7675

Original commit message:
If alignment parameter is set, the memory returned by the
StackSlot operator will be aligned according to the parameter.

The implementation goes like this. If alignment parameter is set
we allocate a bit more memory than actually needed and so we
can move the beginning of the StackSlot in order to have it aligned.

BUG=
==========

to

==========
[turbofan] Reland of `Add alignment parameter to StackSlot operator`

Reland d8bfdb7a998adadc56aa5705a5998e75ceae7675

Original commit message:
If alignment parameter is set, the memory returned by the
StackSlot operator will be aligned according to the parameter.

The implementation goes like this. If alignment parameter is set
we allocate a bit more memory than actually needed and so we
can move the beginning of the StackSlot in order to have it aligned.

BUG=

Review-Url: https://codereview.chromium.org/2874713003
Cr-Commit-Position: refs/heads/master@{#45339}
Committed:
https://chromium.googlesource.com/v8/v8/+/4a5adb43accbdf38baa81915871470890cf...
==========

[commit-bot: I haz the power, 2017-05-16 12:28:06]

Committed patchset #2 (id:20001) as
https://chromium.googlesource.com/v8/v8/+/4a5adb43accbdf38baa81915871470890cf...