MIPS: Fix context loading in CheckAccessGlobalProxy

MIPS: Fix context loading in CheckAccessGlobalProxy

Various failures for MIPS were introduced by the refactoring of
the way frames are marked https://codereview.chromium.org/1696043002.

Problems were caused during context loading in CheckAccessGlobalProxy
* The value of the register at was unintentionally modified.
* Use of branch instruction instead of branch macro resulted in
  a branch instruction in forbidden slot.

BUG=

Committed: https://crrev.com/b64bcb41b13747a5f7a1a221397990efa1f4fcc4
Cr-Commit-Position: refs/heads/master@{#34829}

[Marija Antic, 2016-03-16 14:15:36]

Description was changed from

==========
MIPS: Fix context loading in CheckAccessGlobalProxy

Various failures for MIPS were introduced by the refactoring of
the way frames are marked https://codereview.chromium.org/1696043002.

Problems were caused during context loading in CheckAccessGlobalProxy
* The value of the register at was unintentionally modified.
* Use of branch instruction instead of branch macro resulted in
  a branch instruction in forbidden slot.

BUG=273
==========

to

==========
MIPS: Fix context loading in CheckAccessGlobalProxy

Various failures for MIPS were introduced by the refactoring of
the way frames are marked https://codereview.chromium.org/1696043002.

Problems were caused during context loading in CheckAccessGlobalProxy
* The value of the register at was unintentionally modified.
* Use of branch instruction instead of branch macro resulted in
  a branch instruction in forbidden slot.

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

[Marija Antic, 2016-03-16 14:18:24]

marija.antic@imgtec.com changed reviewers:
+ akos.palfi@imgtec.com, balazs.kilvady@imgtec.com, gergely.kis@imgtec.com,
ilija.pavlovic@imgtec.com, ivica.bogosavljevic@imgtec.com,
miran.karic@imgtec.com

[akos.palfi.imgtec, 2016-03-16 15:11:16]

LGTM

[Marija Antic, 2016-03-16 16:07:35]

The CQ bit was checked by marija.antic@imgtec.com to run a CQ dry run

[commit-bot: I haz the power, 2016-03-16 16:07:41]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1812463002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1812463002/1

[Marija Antic, 2016-03-16 16:07:47]

The CQ bit was unchecked by marija.antic@imgtec.com

[Marija Antic, 2016-03-16 16:08:14]

The CQ bit was checked by marija.antic@imgtec.com to run a CQ dry run

[commit-bot: I haz the power, 2016-03-16 16:08:21]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1812463002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1812463002/1

[commit-bot: I haz the power, 2016-03-16 16:41:23]

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

[commit-bot: I haz the power, 2016-03-16 16:41:24]

Dry run: This issue passed the CQ dry run.

[Marija Antic, 2016-03-16 16:43:25]

The CQ bit was checked by marija.antic@imgtec.com

[commit-bot: I haz the power, 2016-03-16 16:43:33]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1812463002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1812463002/1

[commit-bot: I haz the power, 2016-03-16 16:45:31]

Description was changed from

==========
MIPS: Fix context loading in CheckAccessGlobalProxy

Various failures for MIPS were introduced by the refactoring of
the way frames are marked https://codereview.chromium.org/1696043002.

Problems were caused during context loading in CheckAccessGlobalProxy
* The value of the register at was unintentionally modified.
* Use of branch instruction instead of branch macro resulted in
  a branch instruction in forbidden slot.

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

to

==========
MIPS: Fix context loading in CheckAccessGlobalProxy

Various failures for MIPS were introduced by the refactoring of
the way frames are marked https://codereview.chromium.org/1696043002.

Problems were caused during context loading in CheckAccessGlobalProxy
* The value of the register at was unintentionally modified.
* Use of branch instruction instead of branch macro resulted in
  a branch instruction in forbidden slot.

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

[commit-bot: I haz the power, 2016-03-16 16:45:32]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-03-16 16:46:25]

Description was changed from

==========
MIPS: Fix context loading in CheckAccessGlobalProxy

Various failures for MIPS were introduced by the refactoring of
the way frames are marked https://codereview.chromium.org/1696043002.

Problems were caused during context loading in CheckAccessGlobalProxy
* The value of the register at was unintentionally modified.
* Use of branch instruction instead of branch macro resulted in
  a branch instruction in forbidden slot.

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

to

==========
MIPS: Fix context loading in CheckAccessGlobalProxy

Various failures for MIPS were introduced by the refactoring of
the way frames are marked https://codereview.chromium.org/1696043002.

Problems were caused during context loading in CheckAccessGlobalProxy
* The value of the register at was unintentionally modified.
* Use of branch instruction instead of branch macro resulted in
  a branch instruction in forbidden slot.

BUG=

Committed: https://crrev.com/b64bcb41b13747a5f7a1a221397990efa1f4fcc4
Cr-Commit-Position: refs/heads/master@{#34829}
==========

[commit-bot: I haz the power, 2016-03-16 16:46:25]

Patchset 1 (id:??) landed as
https://crrev.com/b64bcb41b13747a5f7a1a221397990efa1f4fcc4
Cr-Commit-Position: refs/heads/master@{#34829}