Hi,

Pretty sure this is a bug in the ABI used for Apple M1.
The following works with target is amd64_apple but dies
with "invalid class” when target is arm_apple.



export function ub $LF() {
@start
    ret 10
}

export function w $main(w %arg1, l %arg2) {
@start
    %a =ub call $LF()
    call $printf(l $str1, ..., ub %a)
    ret 0
}

data $str1 = { b "Hello world!%c", b 0 }



Best

-- David

Running it in CLion I can see it’s for an instruction with 
    op=86, 
    class=1 (long) and 
    register 33 (is that a FP register?)

HTH

-- David

Hi,

I may have fixed your issue in the latest
commit on the dev branch.

Cheers,