[turbofan] Tighter id-ing of exception value in handler blocks

This change precisely identifies the live range of the
exception operand in a handler block. This avoids confusing
unrelated ranges, which may happen if escape analysis elides
the exception operand.

BUG=chromium:576195
LOG=N

Committed: https://crrev.com/fd7339879e386453231c8f06d2b4285bb4316a96
Cr-Commit-Position: refs/heads/master@{#33271}

[Mircea Trofin, 2016-01-12 22:55:20]

Description was changed from

==========
tighter id-ing of exception value in handler blocks

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

to

==========
This change precisely identifies the live range of the 
exception operand in a handler block. This avoids confusing
unrelated ranges, which may happen if escape analysis elides
the exception operand.

BUG=chromium:576195
==========

[Mircea Trofin, 2016-01-12 22:55:20]

mtrofin@chromium.org changed reviewers:
+ bmeurer@chromium.org, jarin@chromium.org

[Jarin, 2016-01-13 05:10:17]

lgtm. Thanks!

[Mircea Trofin, 2016-01-13 05:12:55]

The CQ bit was checked by mtrofin@chromium.org

[commit-bot: I haz the power, 2016-01-13 05:13:05]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1579603005/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1579603005/1

[commit-bot: I haz the power, 2016-01-13 05:15:31]

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

[commit-bot: I haz the power, 2016-01-13 05:15:32]

Try jobs failed on following builders:
  v8_presubmit on tryserver.v8 (JOB_FAILED,
http://build.chromium.org/p/tryserver.v8/builders/v8_presubmit/builds/9698)

[Mircea Trofin, 2016-01-13 17:04:40]

Description was changed from

==========
This change precisely identifies the live range of the 
exception operand in a handler block. This avoids confusing
unrelated ranges, which may happen if escape analysis elides
the exception operand.

BUG=chromium:576195
==========

to

==========
This change precisely identifies the live range of the 
exception operand in a handler block. This avoids confusing
unrelated ranges, which may happen if escape analysis elides
the exception operand.

BUG=chromium:576195
LOG=N
==========

[Mircea Trofin, 2016-01-13 17:04:57]

The CQ bit was checked by mtrofin@chromium.org

[commit-bot: I haz the power, 2016-01-13 17:05:10]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1579603005/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1579603005/1

[commit-bot: I haz the power, 2016-01-13 17:24:22]

Description was changed from

==========
This change precisely identifies the live range of the 
exception operand in a handler block. This avoids confusing
unrelated ranges, which may happen if escape analysis elides
the exception operand.

BUG=chromium:576195
LOG=N
==========

to

==========
This change precisely identifies the live range of the 
exception operand in a handler block. This avoids confusing
unrelated ranges, which may happen if escape analysis elides
the exception operand.

BUG=chromium:576195
LOG=N
==========

[commit-bot: I haz the power, 2016-01-13 17:24:23]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-01-13 17:25:25]

Description was changed from

==========
This change precisely identifies the live range of the 
exception operand in a handler block. This avoids confusing
unrelated ranges, which may happen if escape analysis elides
the exception operand.

BUG=chromium:576195
LOG=N
==========

to

==========
This change precisely identifies the live range of the
exception operand in a handler block. This avoids confusing
unrelated ranges, which may happen if escape analysis elides
the exception operand.

BUG=chromium:576195
LOG=N

Committed: https://crrev.com/fd7339879e386453231c8f06d2b4285bb4316a96
Cr-Commit-Position: refs/heads/master@{#33271}
==========

[commit-bot: I haz the power, 2016-01-13 17:25:26]

Patchset 1 (id:??) landed as
https://crrev.com/fd7339879e386453231c8f06d2b4285bb4316a96
Cr-Commit-Position: refs/heads/master@{#33271}