Improve macOS AArch64 JIT stencils by relaxing GOT loads

Proposal:

The AArch64 JIT has support for optimising pairs of instructions that load an address through the global offset table (GOT).
On Linux, the JIT optimiser recognises assembly like:

adrp x9, :got:__PyRuntime
ldr  x9, [x9, :got_lo12:__PyRuntime]

https://github.com/python/cpython/blob/0ba7be9a18e8b03af1c046d676f71be9208e06d4/Tools/jit/_optimizers.py#L586-L591

On macOS, Clang uses a different syntax recognised by the Mach-O linker:

adrp x9, __PyRuntime@GOTPAGE
ldr  x9, [x9, __PyRuntime@GOTPAGEOFF]

We can add support for this using the existing patch_aarch64_33rx() function just by adjusting the regex which would enable the same optimisation we already use on Linux:

adrp x9, <__PyRuntime page>
add  x9, x9, <page offset>

This is a natural followup to #157040. I have a small patch ready once jit development is unblocked.

Benchmark:

On my M5 MacBook Pro this shows a 1.16% improvement on the pyperformance suite though results are very noisy. Probably best to re-run with the official benchmarking runners.

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:

#148598, #148501, #157040 /cc @diegorusso

Inizia da Tools/jit/_optimizers.py, in patch_aarch64_33rx(), e confronta il pattern esistente di caricamento GOT su Linux con la sintassi macOS di Clang descritta qui. Aggiorna la logica di matching in modo che venga applicata l’ottimizzazione AArch64 esistente, quindi esegui la suite pyperformance o i runner ufficiali di benchmarking per verificare il risultato.