Revert of MIPS: [turbofan] Fix addition for deoptimization.

Revert of MIPS: [turbofan] Fix addition for deoptimization. (patchset #3 id:40001 of https://codereview.chromium.org/2102063002/ )

Reason for revert:
This workaround is no longer needed, port of e60c4053c7f9d6e44b995c77ab3ec561aec83c9c fixes the issue.

Original issue's description:
> MIPS: [turbofan] Fix addition for deoptimization.
>
> In turbofan, after an addition operation where the same register is the
> output and both inputs, if deoptimization is performed the input is
> overwritten with the output value and the final result is not correct.
> This is fixed by restoring the original value of the input before
> deoptimization.
>
> BUG=
> TEST=mjsunit/regress/regress-int32-truncation
>
> Committed: https://crrev.com/99385e8e4bcef1f333ede61c936528bfc0c8ecfa
> Cr-Commit-Position: refs/heads/master@{#37524}

TBR=akos.palfi@imgtec.com,balazs.kilvady@imgtec.com,ivica.bogosavljevic@imgtec.com
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=

Committed: https://crrev.com/29b89b489a20e1402eb17f9806bca16b7bc44c2b
Cr-Commit-Position: refs/heads/master@{#37612}

[miran.karic, 2016-07-08 13:07:54]

The CQ bit was checked by Miran.Karic@imgtec.com

[miran.karic, 2016-07-08 13:07:54]

Created Revert of MIPS: [turbofan] Fix addition for deoptimization.

[commit-bot: I haz the power, 2016-07-08 13:08:02]

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, 2016-07-08 13:08:03]

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

[commit-bot: I haz the power, 2016-07-08 13:08:04]

No L-G-T-M from a valid reviewer yet. 
CQ run can only be started by full committers or once the patch has
received an L-G-T-M from a full committer.
Even if an L-G-T-M may have been provided, it was from a non-committer,
_not_ a full super star committer.
Committers are members of the group "project-v8-committers".
Note that this has nothing to do with OWNERS files.

[balazs.kilvady, 2016-07-08 13:11:38]

lgtm

[miran.karic, 2016-07-08 13:12:15]

The CQ bit was checked by miran.karic@imgtec.com

[commit-bot: I haz the power, 2016-07-08 13:12:22]

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

[miran.karic, 2016-07-08 13:46:14]

The CQ bit was unchecked by miran.karic@imgtec.com

[miran.karic, 2016-07-08 13:46:38]

The CQ bit was checked by miran.karic@imgtec.com

[commit-bot: I haz the power, 2016-07-08 13:46:42]

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

[miran.karic, 2016-07-08 14:00:05]

The CQ bit was unchecked by miran.karic@imgtec.com

[miran.karic, 2016-07-08 14:01:23]

The CQ bit was checked by miran.karic@imgtec.com

[commit-bot: I haz the power, 2016-07-08 14:01:31]

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, 2016-07-08 14:57:29]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-07-08 14:57:31]

CQ bit was unchecked.

[commit-bot: I haz the power, 2016-07-08 14:57:54]

Description was changed from

==========
Revert of MIPS: [turbofan] Fix addition for deoptimization. (patchset #3
id:40001 of https://codereview.chromium.org/2102063002/ )

Reason for revert:
This workaround is no longer needed, port of
e60c4053c7f9d6e44b995c77ab3ec561aec83c9c fixes the issue.

Original issue's description:
> MIPS: [turbofan] Fix addition for deoptimization.
> 
> In turbofan, after an addition operation where the same register is the
> output and both inputs, if deoptimization is performed the input is
> overwritten with the output value and the final result is not correct.
> This is fixed by restoring the original value of the input before
> deoptimization.
> 
> BUG=
> TEST=mjsunit/regress/regress-int32-truncation
> 
> Committed: https://crrev.com/99385e8e4bcef1f333ede61c936528bfc0c8ecfa
> Cr-Commit-Position: refs/heads/master@{#37524}

TBR=akos.palfi@imgtec.com,balazs.kilvady@imgtec.com,ivica.bogosavljevic@imgte...
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=
==========

to

==========
Revert of MIPS: [turbofan] Fix addition for deoptimization. (patchset #3
id:40001 of https://codereview.chromium.org/2102063002/ )

Reason for revert:
This workaround is no longer needed, port of
e60c4053c7f9d6e44b995c77ab3ec561aec83c9c fixes the issue.

Original issue's description:
> MIPS: [turbofan] Fix addition for deoptimization.
>
> In turbofan, after an addition operation where the same register is the
> output and both inputs, if deoptimization is performed the input is
> overwritten with the output value and the final result is not correct.
> This is fixed by restoring the original value of the input before
> deoptimization.
>
> BUG=
> TEST=mjsunit/regress/regress-int32-truncation
>
> Committed: https://crrev.com/99385e8e4bcef1f333ede61c936528bfc0c8ecfa
> Cr-Commit-Position: refs/heads/master@{#37524}

TBR=akos.palfi@imgtec.com,balazs.kilvady@imgtec.com,ivica.bogosavljevic@imgte...
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=

Committed: https://crrev.com/29b89b489a20e1402eb17f9806bca16b7bc44c2b
Cr-Commit-Position: refs/heads/master@{#37612}
==========

[commit-bot: I haz the power, 2016-07-08 14:57:55]

Patchset 1 (id:??) landed as
https://crrev.com/29b89b489a20e1402eb17f9806bca16b7bc44c2b
Cr-Commit-Position: refs/heads/master@{#37612}