Move type checks from switch cases to beginning of `_Py_Specialize_BinaryOp`

Feature or enhancement

Proposal:

_Py_Specialize_BinaryOp: https://github.com/python/cpython/blob/aeb9b65aa26444529e4adc7d6e5b0d3dd9889ec2/Python/specialize.c#L2380-L2443
uses

if (!Py_IS_TYPE(lhs, Py_TYPE(rhs))) { 
    break; 
} 

check inside every switch case which is redundant. Placing this check before switch results in same performance but less generated code. Compiler with -O3 option seems to not recognize it. Attaching generated machine code (clang, apple silicon) for old and new versions
new.txt
old.txt

Feel free to close this if not worth it.

Has this already been discussed elsewhere?

No response given

Links to previous discussion of this feature:

No response

Linked PRs

• gh-128311

Controlla prima gh-128311, poiché l’issue rimanda a un lavoro già in corso. Poi leggi Python/specialize.c in _Py_Specialize_BinaryOp e confronta l’output del compilatore allegato di old.txt e new.txt; il lavoro è concluso quando i controlli ridondanti vengono gestiti in modo coerente e il codice generato produce il risultato previsto.