Classes with __slots__ ought to be specialized when constructing instances

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Feature or enhancement

Proposal:

Right now simple classes have the CALL_ALLOC_AND_ENTER_INIT specialization when calling their constructor. This however, blocks classes with __slots__. I propose relaxing the requirement and allowing __slots__ classes to benefit from this specialization as well.

Has this already been discussed elsewhere?

This is a minor feature, which does not need previous discussion elsewhere

Links to previous discussion of this feature:

No response

Linked PRs

• gh-128262: Allow specialization of calls to classes with __slots__ #128263