[eddyb]

Did you mean to link to a different example, or different compiler flags?

The link you provide shows only one function, because LLVM has optimized both to be identical, and deduplicated them.

(If you disable the "Directives" filter, you can see a `.set example::clone_concrete, example::clone_abstract`, which aliases one to the other)

[5462]

The behavior differs between (the present) nightly and rustc 1.45.2; the nightly available when this link was posted matched the 1.45.2 behavior.

The output with 1.45.2 is as follows:

  example::clone_concrete:
        mov     eax, edi
        ret

  example::clone_abstract:
        mov     ecx, edi
        and     ecx, -256
        xor     eax, eax
        xor     edx, edx
        cmp     dil, 1
        sete    dl
        cmove   eax, ecx
        or      eax, edx
        ret

[eddyb]

Fascinating coincidence! It was probably the LLVM upgrade (https://github.com/rust-lang/rust/pull/73526) landing, probably before the comment was even posted (but the nightly would only show up with the upgraded LLVM the next day).