MIPS64: Fix '[turbofan] Add an operator to access the parent frame pointer'.

MIPS64: Fix '[turbofan] Add an operator to access the parent frame pointer'.

Port fd8fd05cc5389a44a3d15ace0cf34b43369b758e

Original commit message:
This functionality is useful for stubs that need to walk the stack. The new
machine operator, LoadParentFramePointer doesn't force the currently compiling
method to have a frame in contrast to LoadFramePointer. Instead, it adapts
accordingly when frame elision is possible, making efficient stack walks
possible without incurring a performance penalty for small stubs that can
benefit from frame elision.

BUG=

Committed: https://crrev.com/a7b315b50ca0e2dfb01efc63e108035a03073d07
Cr-Commit-Position: refs/heads/master@{#34066}

[balazs.kilvady, 2016-02-16 19:12:39]

balazs.kilvady@imgtec.com changed reviewers:
+ akos.palfi@imgtec.com, bmeurer@chromium.org, danno@chromium.org,
gergely.kis@imgtec.com

[akos.palfi.imgtec, 2016-02-16 23:42:32]

lgtm

[balazs.kilvady, 2016-02-17 09:43:06]

The CQ bit was checked by balazs.kilvady@imgtec.com

[commit-bot: I haz the power, 2016-02-17 09:43:10]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1701933003/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1701933003/1

[commit-bot: I haz the power, 2016-02-17 10:09:55]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-02-17 10:10:22]

Description was changed from

==========
MIPS64: Fix '[turbofan] Add an operator to access the parent frame pointer'.

Port fd8fd05cc5389a44a3d15ace0cf34b43369b758e

Original commit message:
This functionality is useful for stubs that need to walk the stack. The new
machine operator, LoadParentFramePointer doesn't force the currently compiling
method to have a frame in contrast to LoadFramePointer. Instead, it adapts
accordingly when frame elision is possible, making efficient stack walks
possible without incurring a performance penalty for small stubs that can
benefit from frame elision.

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

to

==========
MIPS64: Fix '[turbofan] Add an operator to access the parent frame pointer'.

Port fd8fd05cc5389a44a3d15ace0cf34b43369b758e

Original commit message:
This functionality is useful for stubs that need to walk the stack. The new
machine operator, LoadParentFramePointer doesn't force the currently compiling
method to have a frame in contrast to LoadFramePointer. Instead, it adapts
accordingly when frame elision is possible, making efficient stack walks
possible without incurring a performance penalty for small stubs that can
benefit from frame elision.

BUG=

Committed: https://crrev.com/a7b315b50ca0e2dfb01efc63e108035a03073d07
Cr-Commit-Position: refs/heads/master@{#34066}
==========

[commit-bot: I haz the power, 2016-02-17 10:10:25]

Patchset 1 (id:??) landed as
https://crrev.com/a7b315b50ca0e2dfb01efc63e108035a03073d07
Cr-Commit-Position: refs/heads/master@{#34066}