[turbofan] Introduce Oddball::to_number_raw and use it for change lowering.

[turbofan] Introduce Oddball::to_number_raw and use it for change lowering.

The Oddball::to_number_raw field contains the actual double value of the
Oddball converted to a number, and is located at the same offset as the
HeapNumber::value field, so for lowering changes we don't need to check
for undefined (or any other oddball explicitly).

R=jarin@chromium.org

Committed: https://crrev.com/d1fb8384e02be1904e6a4e033ec1d3a6053a53f5
Cr-Commit-Position: refs/heads/master@{#35753}

[Jarin, 2016-04-25 08:48:55]

lgtm

[Benedikt Meurer, 2016-04-25 08:50:05]

The CQ bit was checked by bmeurer@chromium.org

[commit-bot: I haz the power, 2016-04-25 08:50:09]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1922443002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1922443002/1

[commit-bot: I haz the power, 2016-04-25 09:17:06]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-04-25 09:18:47]

Description was changed from

==========
[turbofan] Introduce Oddball::to_number_raw and use it for change lowering.

The Oddball::to_number_raw field contains the actual double value of the
Oddball converted to a number, and is located at the same offset as the
HeapNumber::value field, so for lowering changes we don't need to check
for undefined (or any other oddball explicitly).

R=jarin@chromium.org
==========

to

==========
[turbofan] Introduce Oddball::to_number_raw and use it for change lowering.

The Oddball::to_number_raw field contains the actual double value of the
Oddball converted to a number, and is located at the same offset as the
HeapNumber::value field, so for lowering changes we don't need to check
for undefined (or any other oddball explicitly).

R=jarin@chromium.org

Committed: https://crrev.com/d1fb8384e02be1904e6a4e033ec1d3a6053a53f5
Cr-Commit-Position: refs/heads/master@{#35753}
==========

[commit-bot: I haz the power, 2016-04-25 09:18:48]

Patchset 1 (id:??) landed as
https://crrev.com/d1fb8384e02be1904e6a4e033ec1d3a6053a53f5
Cr-Commit-Position: refs/heads/master@{#35753}