S390:[crankshaft] Sign-ext key before array access

S390:[crankshaft] Sign-ext key before array access

The 'key' value being passed into an array access should
be sign-extended on 64-bit platforms before being used to
index into memory.  Otherwise, garbage in the upper 32-bits
may result in a segmentation fault.

Minor fix to DoFlooringDivI to enforce 32-bit operations for calculation.

R=jyan@ca.ibm.com,michael_dawson@ca.ibm.com,mbrandy@us.ibm.com
BUG=

Committed: https://crrev.com/bdcefb9dc1ed225dfc3b3562d1d32458e13f342e
Cr-Commit-Position: refs/heads/master@{#35000}

[JoranSiu, 2016-03-22 16:53:27]

The CQ bit was checked by joransiu@ca.ibm.com to run a CQ dry run

[commit-bot: I haz the power, 2016-03-22 16:53:36]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1822103002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1822103002/1

[JoranSiu, 2016-03-22 16:57:26]

Description was changed from

==========
S390:[crankshaft] Sign-ext key before array access

The 'key' value being passed into an array access should
be sign-extended on 64-bit platforms before being used to
index into memory.  Otherwise, garbage in the upper 32-bits
may result in a segmentation fault.

R=jyan@ca.ibm.com,michael_dawson@ca.ibm.com,mbrandy@us.ibm.com
BUG=
==========

to

==========
S390:[crankshaft] Sign-ext key before array access

The 'key' value being passed into an array access should
be sign-extended on 64-bit platforms before being used to
index into memory.  Otherwise, garbage in the upper 32-bits
may result in a segmentation fault.

Minor fix to DoFlooringDivI to enforce 32-bit operations for calculation.

R=jyan@ca.ibm.com,michael_dawson@ca.ibm.com,mbrandy@us.ibm.com
BUG=
==========

[john.yan, 2016-03-22 16:57:48]

lgtm

[commit-bot: I haz the power, 2016-03-22 17:13:58]

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

[commit-bot: I haz the power, 2016-03-22 17:13:59]

Dry run: This issue passed the CQ dry run.

[JoranSiu, 2016-03-22 17:15:04]

The CQ bit was checked by joransiu@ca.ibm.com

[commit-bot: I haz the power, 2016-03-22 17:15:08]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1822103002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1822103002/1

[commit-bot: I haz the power, 2016-03-22 17:17:09]

Description was changed from

==========
S390:[crankshaft] Sign-ext key before array access

The 'key' value being passed into an array access should
be sign-extended on 64-bit platforms before being used to
index into memory.  Otherwise, garbage in the upper 32-bits
may result in a segmentation fault.

Minor fix to DoFlooringDivI to enforce 32-bit operations for calculation.

R=jyan@ca.ibm.com,michael_dawson@ca.ibm.com,mbrandy@us.ibm.com
BUG=
==========

to

==========
S390:[crankshaft] Sign-ext key before array access

The 'key' value being passed into an array access should
be sign-extended on 64-bit platforms before being used to
index into memory.  Otherwise, garbage in the upper 32-bits
may result in a segmentation fault.

Minor fix to DoFlooringDivI to enforce 32-bit operations for calculation.

R=jyan@ca.ibm.com,michael_dawson@ca.ibm.com,mbrandy@us.ibm.com
BUG=
==========

[commit-bot: I haz the power, 2016-03-22 17:17:10]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-03-22 17:18:35]

Description was changed from

==========
S390:[crankshaft] Sign-ext key before array access

The 'key' value being passed into an array access should
be sign-extended on 64-bit platforms before being used to
index into memory.  Otherwise, garbage in the upper 32-bits
may result in a segmentation fault.

Minor fix to DoFlooringDivI to enforce 32-bit operations for calculation.

R=jyan@ca.ibm.com,michael_dawson@ca.ibm.com,mbrandy@us.ibm.com
BUG=
==========

to

==========
S390:[crankshaft] Sign-ext key before array access

The 'key' value being passed into an array access should
be sign-extended on 64-bit platforms before being used to
index into memory.  Otherwise, garbage in the upper 32-bits
may result in a segmentation fault.

Minor fix to DoFlooringDivI to enforce 32-bit operations for calculation.

R=jyan@ca.ibm.com,michael_dawson@ca.ibm.com,mbrandy@us.ibm.com
BUG=

Committed: https://crrev.com/bdcefb9dc1ed225dfc3b3562d1d32458e13f342e
Cr-Commit-Position: refs/heads/master@{#35000}
==========

[commit-bot: I haz the power, 2016-03-22 17:18:36]

Patchset 1 (id:??) landed as
https://crrev.com/bdcefb9dc1ed225dfc3b3562d1d32458e13f342e
Cr-Commit-Position: refs/heads/master@{#35000}