[Turbofan] Save and restore lr in OutOfLineRecordWrite when frame is elided.

[Turbofan] Save and restore lr in OutOfLineRecordWrite when frame is elided.

Fixes a bug in Ignition on Arm64 where lr gets trashed in StaContextSlot
which causes the stack walker to get confused and crash.

BUG=v8:4680
LOG=N

Committed: https://crrev.com/84a225d1e4e07c4d0b841ebc1cfb2ccf6c0a9c49
Cr-Commit-Position: refs/heads/master@{#34016}

[rmcilroy, 2016-02-15 15:03:03]

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

[commit-bot: I haz the power, 2016-02-15 15:03:12]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1694263002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1694263002/1

[rmcilroy, 2016-02-15 15:03:27]

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

[rmcilroy, 2016-02-15 15:03:28]

Benedkit, PTAL, thanks.

[commit-bot: I haz the power, 2016-02-15 15:24:41]

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

[commit-bot: I haz the power, 2016-02-15 15:24:41]

Dry run: This issue passed the CQ dry run.

[Benedikt Meurer, 2016-02-16 05:02:31]

LGTM. Thanks for addressing this.

[rmcilroy, 2016-02-16 07:47:33]

The CQ bit was checked by rmcilroy@chromium.org

[commit-bot: I haz the power, 2016-02-16 07:47:39]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1694263002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1694263002/1

[commit-bot: I haz the power, 2016-02-16 07:48:51]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-02-16 07:49:21]

Description was changed from

==========
[Turbofan] Save and restore lr in OutOfLineRecordWrite when frame is elided.

Fixes a bug in Ignition on Arm64 where lr gets trashed in StaContextSlot
which causes the stack walker to get confused and crash.

BUG=v8:4680
LOG=N
==========

to

==========
[Turbofan] Save and restore lr in OutOfLineRecordWrite when frame is elided.

Fixes a bug in Ignition on Arm64 where lr gets trashed in StaContextSlot
which causes the stack walker to get confused and crash.

BUG=v8:4680
LOG=N

Committed: https://crrev.com/84a225d1e4e07c4d0b841ebc1cfb2ccf6c0a9c49
Cr-Commit-Position: refs/heads/master@{#34016}
==========

[commit-bot: I haz the power, 2016-02-16 07:49:21]

Patchset 1 (id:??) landed as
https://crrev.com/84a225d1e4e07c4d0b841ebc1cfb2ccf6c0a9c49
Cr-Commit-Position: refs/heads/master@{#34016}