PPC: [stubs] Split ToNumberStub into reusable subparts.

PPC: [stubs] Split ToNumberStub into reusable subparts.

Port b7aa4c3ab35b3a28fee7fc49bf7aa1003d66959e

Original commit message:
    Split ToNumberStub into the entry ToNumberStub, and two new stubs,
    StringToNumberStub and NonNumberToNumberStub, which can be used when we
    already know something about the input (i.e. in various branches of the
    code stubs, or in TurboFan graphs).

    Also introduce an appropriate StringToNumber simplified operator for
    TurboFan, that is pure and is lowered to an invocation of the newly
    added StringToNumberStub.

R=bmeurer@chromium.org, joransiu@ca.ibm.com, jyan@ca.ibm.com, michael_dawson@ca.ibm.com
BUG=

Committed: https://crrev.com/69e8bb4357fd7592b6c2b50b70234b2586abb617
Cr-Commit-Position: refs/heads/master@{#34998}

[MTBrandyberry, 2016-03-22 15:27:10]

PTAL

[MTBrandyberry, 2016-03-22 15:27:17]

The CQ bit was checked by mbrandy@us.ibm.com to run a CQ dry run

[commit-bot: I haz the power, 2016-03-22 15:27:25]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1826483002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1826483002/1

[commit-bot: I haz the power, 2016-03-22 15:48:43]

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

[commit-bot: I haz the power, 2016-03-22 15:48:44]

Dry run: This issue passed the CQ dry run.

[john.yan, 2016-03-22 16:47:36]

lgtm

[MTBrandyberry, 2016-03-22 16:50:28]

The CQ bit was checked by mbrandy@us.ibm.com

[commit-bot: I haz the power, 2016-03-22 16:50:37]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1826483002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1826483002/1

[commit-bot: I haz the power, 2016-03-22 16:52:37]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-03-22 16:53:56]

Description was changed from

==========
PPC: [stubs] Split ToNumberStub into reusable subparts.

Port b7aa4c3ab35b3a28fee7fc49bf7aa1003d66959e

Original commit message:
    Split ToNumberStub into the entry ToNumberStub, and two new stubs,
    StringToNumberStub and NonNumberToNumberStub, which can be used when we
    already know something about the input (i.e. in various branches of the
    code stubs, or in TurboFan graphs).

    Also introduce an appropriate StringToNumber simplified operator for
    TurboFan, that is pure and is lowered to an invocation of the newly
    added StringToNumberStub.

R=bmeurer@chromium.org, joransiu@ca.ibm.com, jyan@ca.ibm.com,
michael_dawson@ca.ibm.com
BUG=
==========

to

==========
PPC: [stubs] Split ToNumberStub into reusable subparts.

Port b7aa4c3ab35b3a28fee7fc49bf7aa1003d66959e

Original commit message:
    Split ToNumberStub into the entry ToNumberStub, and two new stubs,
    StringToNumberStub and NonNumberToNumberStub, which can be used when we
    already know something about the input (i.e. in various branches of the
    code stubs, or in TurboFan graphs).

    Also introduce an appropriate StringToNumber simplified operator for
    TurboFan, that is pure and is lowered to an invocation of the newly
    added StringToNumberStub.

R=bmeurer@chromium.org, joransiu@ca.ibm.com, jyan@ca.ibm.com,
michael_dawson@ca.ibm.com
BUG=

Committed: https://crrev.com/69e8bb4357fd7592b6c2b50b70234b2586abb617
Cr-Commit-Position: refs/heads/master@{#34998}
==========

[commit-bot: I haz the power, 2016-03-22 16:53:58]

Patchset 1 (id:??) landed as
https://crrev.com/69e8bb4357fd7592b6c2b50b70234b2586abb617
Cr-Commit-Position: refs/heads/master@{#34998}