PPC64: [turbofan] Change TruncateFloat64ToUint64 to TryTruncateFloatToUint64.

PPC64: [turbofan] Change TruncateFloat64ToUint64 to TryTruncateFloatToUint64.

Port c343f30923ab8b9f99d3f565e8ab65837cbb9efb

Original commit message:
    This operator now provides a second output which indicates whether the
    conversion from float64 to uint64 was successful or not. The second output
    returns 0 if the conversion fails, or something else if the conversion
    succeeds.

    The second output can be ignored, which means that the operator can be used
    the same as the original operator.

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

Committed: https://crrev.com/caea1bbda0ccb3b2432f30e70664b4625f129d74
Cr-Commit-Position: refs/heads/master@{#32728}

[MTBrandyberry, 2015-12-09 17:58:22]

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

[commit-bot: I haz the power, 2015-12-09 17:58:30]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1512963002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1512963002/1

[john.yan, 2015-12-09 18:09:44]

lgtm

[commit-bot: I haz the power, 2015-12-09 18:35:19]

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

[commit-bot: I haz the power, 2015-12-09 18:35:20]

Dry run: This issue passed the CQ dry run.

[MTBrandyberry, 2015-12-09 18:35:49]

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

[commit-bot: I haz the power, 2015-12-09 18:35:56]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1512963002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1512963002/1

[commit-bot: I haz the power, 2015-12-09 18:36:56]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-12-09 18:37:32]

Description was changed from

==========
PPC64: [turbofan] Change TruncateFloat64ToUint64 to TryTruncateFloatToUint64.

Port c343f30923ab8b9f99d3f565e8ab65837cbb9efb

Original commit message:
    This operator now provides a second output which indicates whether the
    conversion from float64 to uint64 was successful or not. The second output
    returns 0 if the conversion fails, or something else if the conversion
    succeeds.

    The second output can be ignored, which means that the operator can be used
    the same as the original operator.

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

to

==========
PPC64: [turbofan] Change TruncateFloat64ToUint64 to TryTruncateFloatToUint64.

Port c343f30923ab8b9f99d3f565e8ab65837cbb9efb

Original commit message:
    This operator now provides a second output which indicates whether the
    conversion from float64 to uint64 was successful or not. The second output
    returns 0 if the conversion fails, or something else if the conversion
    succeeds.

    The second output can be ignored, which means that the operator can be used
    the same as the original operator.

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

Committed: https://crrev.com/caea1bbda0ccb3b2432f30e70664b4625f129d74
Cr-Commit-Position: refs/heads/master@{#32728}
==========

[commit-bot: I haz the power, 2015-12-09 18:37:33]

Patchset 1 (id:??) landed as
https://crrev.com/caea1bbda0ccb3b2432f30e70664b4625f129d74
Cr-Commit-Position: refs/heads/master@{#32728}