PPC/s390: [stubs] Drop CallApiCallbackStub::call_data_undefined optimization.

PPC/s390: [stubs] Drop CallApiCallbackStub::call_data_undefined optimization.

Port 46d0e4818a361b3fb535e1c78973b4d1ace000dc

Original Commit Message:

    The CallApiCallbackStub can avoid loading undefined in case the
    call_data is already undefined, which doubles the number of versions of
    the stub and adds unnecessary complexity (at the benefit of saving one
    stupid load). The idea is to turn the CallApiCallbackStub into a single
    builtin instead, which does the right thing, so this is the first step
    towards that goal.

R=bmeurer@chromium.org, joransiu@ca.ibm.com, jyan@ca.ibm.com, michael_dawson@ca.ibm.com
BUG=v8:6304
LOG=N

Review-Url: https://codereview.chromium.org/2837283004
Cr-Commit-Position: refs/heads/master@{#44872}
Committed: https://chromium.googlesource.com/v8/v8/+/336876989a50112d9012802fd824d57d39bcf8ed

[JaideepBajwa, 2017-04-25 21:09:41]

ptal

[john.yan, 2017-04-25 21:10:44]

lgtm

[JaideepBajwa, 2017-04-25 21:11:03]

The CQ bit was checked by bjaideep@ca.ibm.com

[commit-bot: I haz the power, 2017-04-25 21:11:11]

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, 2017-04-25 21:37:14]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1493154663071200, "parent_rev":
"f661fe84f4c3ded6370db988cfc0e6f659d59223", "commit_rev":
"336876989a50112d9012802fd824d57d39bcf8ed"}

[commit-bot: I haz the power, 2017-04-25 21:37:20]

Description was changed from

==========
PPC/s390: [stubs] Drop CallApiCallbackStub::call_data_undefined optimization.

Port 46d0e4818a361b3fb535e1c78973b4d1ace000dc

Original Commit Message:

    The CallApiCallbackStub can avoid loading undefined in case the
    call_data is already undefined, which doubles the number of versions of
    the stub and adds unnecessary complexity (at the benefit of saving one
    stupid load). The idea is to turn the CallApiCallbackStub into a single
    builtin instead, which does the right thing, so this is the first step
    towards that goal.

R=bmeurer@chromium.org, joransiu@ca.ibm.com, jyan@ca.ibm.com,
michael_dawson@ca.ibm.com
BUG=v8:6304
LOG=N
==========

to

==========
PPC/s390: [stubs] Drop CallApiCallbackStub::call_data_undefined optimization.

Port 46d0e4818a361b3fb535e1c78973b4d1ace000dc

Original Commit Message:

    The CallApiCallbackStub can avoid loading undefined in case the
    call_data is already undefined, which doubles the number of versions of
    the stub and adds unnecessary complexity (at the benefit of saving one
    stupid load). The idea is to turn the CallApiCallbackStub into a single
    builtin instead, which does the right thing, so this is the first step
    towards that goal.

R=bmeurer@chromium.org, joransiu@ca.ibm.com, jyan@ca.ibm.com,
michael_dawson@ca.ibm.com
BUG=v8:6304
LOG=N

Review-Url: https://codereview.chromium.org/2837283004
Cr-Commit-Position: refs/heads/master@{#44872}
Committed:
https://chromium.googlesource.com/v8/v8/+/336876989a50112d9012802fd824d57d39b...
==========

[commit-bot: I haz the power, 2017-04-25 21:37:22]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/v8/v8/+/336876989a50112d9012802fd824d57d39b...