MIPS: [turbofan] Fix addition for deoptimization.

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}

[miran.karic, 2016-07-04 13:24:03]

Description was changed from

==========
MIPS64: Fix deoptimization for turbofan Mips64Dadd

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=
==========

to

==========
MIPS[64]: Fix addition deoptimization for turbofan

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=
==========

[miran.karic, 2016-07-04 13:42:12]

miran.karic@imgtec.com changed reviewers:
+ akos.palfi@imgtec.com, balazs.kilvady@imgtec.com,
ivica.bogosavljevic@imgtec.com

[miran.karic, 2016-07-04 13:42:12]

PTAL

[balazs.kilvady, 2016-07-05 10:12:51]

Please fix the message:
MIPS: [turbofan] Fix addition for deoptimization.

blabla...

TEST=mjsunit/regress/regress-int32-truncation

[miran.karic, 2016-07-05 10:47:55]

Description was changed from

==========
MIPS[64]: Fix addition deoptimization for turbofan

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=
==========

to

==========
MIPS: [turbofan] Fix deoptimization for addition.

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
==========

[miran.karic, 2016-07-05 10:51:14]

Description was changed from

==========
MIPS: [turbofan] Fix deoptimization for addition.

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
==========

to

==========
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
==========

[miran.karic, 2016-07-05 10:52:34]

On 2016/07/05 10:12:51, balazs.kilvady wrote:
> Please fix the message:
> MIPS: [turbofan] Fix addition for deoptimization.
> 
> blabla...
> 
> TEST=mjsunit/regress/regress-int32-truncation

Fixed the description.

[balazs.kilvady, 2016-07-05 10:54:35]

lgtm

[miran.karic, 2016-07-05 10:59:28]

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

[commit-bot: I haz the power, 2016-07-05 10:59:36]

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, 2016-07-05 11:23:21]

Description was changed from

==========
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
==========

to

==========
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
==========

[commit-bot: I haz the power, 2016-07-05 11:23:22]

Committed patchset #3 (id:40001)

[commit-bot: I haz the power, 2016-07-05 11:24:22]

Description was changed from

==========
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
==========

to

==========
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}
==========

[commit-bot: I haz the power, 2016-07-05 11:24:23]

Patchset 3 (id:??) landed as
https://crrev.com/99385e8e4bcef1f333ede61c936528bfc0c8ecfa
Cr-Commit-Position: refs/heads/master@{#37524}

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

A revert of this CL (patchset #3 id:40001) has been created in
https://codereview.chromium.org/2129083003/ by Miran.Karic@imgtec.com.

The reason for reverting is: This workaround is no longer needed, port of
e60c4053c7f9d6e44b995c77ab3ec561aec83c9c fixes the issue..