[turbofan] Fix escape analysis of sub-word element access.

[turbofan] Fix escape analysis of sub-word element access.

This fixes data-flow tracking of sub-word (i.e. int8 or int16) element
accesses withing the escape analysis. In essense this makes sure that
we only ever consider the offset for loads and stores on tracked objects
and avoid mangling the offset on untracked ones.

R=jarin@chromium.org
TEST=cctest/test-api/Fixed[U]Int[8,16]Array

Committed: https://crrev.com/5dc600528112fb4dcad1fc628a41412d78b933ef
Cr-Commit-Position: refs/heads/master@{#36573}

[Michael Starzinger, 2016-05-24 12:45:22]

Description was changed from

==========
[turbofan] Fix escape analysi of sub-word element access.

This fixes data-flow tracking of sub-word (i.e. int8 or int16) element
accesses withing the escape analysis. In essense this makes sure that
we only ever consider the offset for loads and stores on tracked objects
and avoid mangling the offset on untracked ones.

R=jarin@chromium.org
TEST=cctest/test-api/Fixed[U]Int[8,16]Array
==========

to

==========
[turbofan] Fix escape analysis of sub-word element access.

This fixes data-flow tracking of sub-word (i.e. int8 or int16) element
accesses withing the escape analysis. In essense this makes sure that
we only ever consider the offset for loads and stores on tracked objects
and avoid mangling the offset on untracked ones.

R=jarin@chromium.org
TEST=cctest/test-api/Fixed[U]Int[8,16]Array
==========

[Jarin, 2016-05-30 08:12:16]

lgtm

[Michael Starzinger, 2016-05-30 08:13:34]

The CQ bit was checked by mstarzinger@chromium.org

[commit-bot: I haz the power, 2016-05-30 08:13:39]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/2008883002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/2008883002/1

[commit-bot: I haz the power, 2016-05-30 08:37:38]

Description was changed from

==========
[turbofan] Fix escape analysis of sub-word element access.

This fixes data-flow tracking of sub-word (i.e. int8 or int16) element
accesses withing the escape analysis. In essense this makes sure that
we only ever consider the offset for loads and stores on tracked objects
and avoid mangling the offset on untracked ones.

R=jarin@chromium.org
TEST=cctest/test-api/Fixed[U]Int[8,16]Array
==========

to

==========
[turbofan] Fix escape analysis of sub-word element access.

This fixes data-flow tracking of sub-word (i.e. int8 or int16) element
accesses withing the escape analysis. In essense this makes sure that
we only ever consider the offset for loads and stores on tracked objects
and avoid mangling the offset on untracked ones.

R=jarin@chromium.org
TEST=cctest/test-api/Fixed[U]Int[8,16]Array
==========

[commit-bot: I haz the power, 2016-05-30 08:37:39]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-05-30 08:38:56]

Description was changed from

==========
[turbofan] Fix escape analysis of sub-word element access.

This fixes data-flow tracking of sub-word (i.e. int8 or int16) element
accesses withing the escape analysis. In essense this makes sure that
we only ever consider the offset for loads and stores on tracked objects
and avoid mangling the offset on untracked ones.

R=jarin@chromium.org
TEST=cctest/test-api/Fixed[U]Int[8,16]Array
==========

to

==========
[turbofan] Fix escape analysis of sub-word element access.

This fixes data-flow tracking of sub-word (i.e. int8 or int16) element
accesses withing the escape analysis. In essense this makes sure that
we only ever consider the offset for loads and stores on tracked objects
and avoid mangling the offset on untracked ones.

R=jarin@chromium.org
TEST=cctest/test-api/Fixed[U]Int[8,16]Array

Committed: https://crrev.com/5dc600528112fb4dcad1fc628a41412d78b933ef
Cr-Commit-Position: refs/heads/master@{#36573}
==========

[commit-bot: I haz the power, 2016-05-30 08:38:57]

Patchset 1 (id:??) landed as
https://crrev.com/5dc600528112fb4dcad1fc628a41412d78b933ef
Cr-Commit-Position: refs/heads/master@{#36573}