[turbofan] Introduce a SpeculativeToNumber operator.

[turbofan] Introduce a SpeculativeToNumber operator.

Add a dedicated operator for ToNumber(x) with feedback instead of
translating to SpeculativeNumberMultiply(x,1), which allows us to
treat the case where x is already a Number specially, ignoring the
feedback on the operator. This recovers most of the regression in
the crypto benchmark.

BUG=chromium:709398, v8:6214, v8:5267
R=jarin@chromium.org

Review-Url: https://codereview.chromium.org/2802113003
Cr-Commit-Position: refs/heads/master@{#44484}
Committed: https://chromium.googlesource.com/v8/v8/+/e6ca01463de333bd4069d23c616c26647897e749

[Benedikt Meurer, 2017-04-07 10:43:15]

The CQ bit was checked by bmeurer@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2017-04-07 10:43:17]

Dry run: 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, 2017-04-07 10:46:27]

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

[commit-bot: I haz the power, 2017-04-07 10:46:28]

Dry run: Try jobs failed on following builders:
  v8_win_compile_dbg on master.tryserver.v8 (JOB_FAILED,
http://build.chromium.org/p/tryserver.v8/builders/v8_win_compile_dbg/builds/3...)

[Benedikt Meurer, 2017-04-07 10:59:50]

The CQ bit was checked by bmeurer@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2017-04-07 10:59:57]

Dry run: CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[Jarin, 2017-04-07 11:12:27]

lgtm

[Benedikt Meurer, 2017-04-07 11:15:47]

The CQ bit was unchecked by bmeurer@chromium.org

[Benedikt Meurer, 2017-04-07 11:15:51]

The CQ bit was checked by bmeurer@chromium.org

[commit-bot: I haz the power, 2017-04-07 11:15:53]

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, 2017-04-07 12:12:24]

CQ is committing da patch.

Bot data: {"patchset_id": 20001, "attempt_start_ts": 1491563751007520,
"parent_rev": "e434d11ffe461dc39810db362441cd44943732f5", "commit_rev":
"e6ca01463de333bd4069d23c616c26647897e749"}

[commit-bot: I haz the power, 2017-04-07 12:12:30]

Description was changed from

==========
[turbofan] Introduce a SpeculativeToNumber operator.

Add a dedicated operator for ToNumber(x) with feedback instead of
translating to SpeculativeNumberMultiply(x,1), which allows us to
treat the case where x is already a Number specially, ignoring the
feedback on the operator. This recovers most of the regression in
the crypto benchmark.

BUG=chromium:709398,v8:6214,v8:5267
R=jarin@chromium.org
==========

to

==========
[turbofan] Introduce a SpeculativeToNumber operator.

Add a dedicated operator for ToNumber(x) with feedback instead of
translating to SpeculativeNumberMultiply(x,1), which allows us to
treat the case where x is already a Number specially, ignoring the
feedback on the operator. This recovers most of the regression in
the crypto benchmark.

BUG=chromium:709398,v8:6214,v8:5267
R=jarin@chromium.org

Review-Url: https://codereview.chromium.org/2802113003
Cr-Commit-Position: refs/heads/master@{#44484}
Committed:
https://chromium.googlesource.com/v8/v8/+/e6ca01463de333bd4069d23c616c2664789...
==========

[commit-bot: I haz the power, 2017-04-07 12:12:31]

Committed patchset #2 (id:20001) as
https://chromium.googlesource.com/v8/v8/+/e6ca01463de333bd4069d23c616c2664789...