Array constructor expects AllocationSite or undefined as feedback.

Array constructor expects AllocationSite or undefined as feedback.

Redefine Array constructor to expect an AllocationSite in the feedback
register or undefined. This will make code simpler as we support
pretenuring feedback for all constructed objects.

R=hpayer@chromium.org

Committed: https://code.google.com/p/v8/source/detail?r=20064

[mvstanton, 2014-03-18 12:34:36]

Hi Hannes, as discussed, here is a snippet of work from the already-reviewed
pretenure-call-new support (https://codereview.chromium.org/132963012/).

The one piece of new code is in CallConstructStub::Generate(), where just after
the call to GenerateRecordCallTarget(), we need to conditionally put either the
AllocationSite or undefined value in the feedback register.

Pretenure call new doesn't need to do that because it is guaranteed to always
have an allocation site in this case.

[Hannes Payer (out of office), 2014-03-19 11:37:41]

lgtm

[mvstanton, 2014-03-19 11:51:42]

Committed patchset #2 manually as r20064 (presubmit successful).