Re: [r17-1582 Regression] FAIL: gcc.dg/spaceship_mixed_variants.c scan-tree-dump-times optimized "\\.SPACESHIP \\([^, ]+, [^, ]+, -1\\)" 64 on Linux/x86_64

On Tue, Jun 16, 2026 at 5:44 AM Haochen Jiang <[email protected]> wrote:
>
> On Linux/x86_64,
>
> 7659926b80deaf0523d9ccee51446b4187f978cb is the first bad commit
> commit 7659926b80deaf0523d9ccee51446b4187f978cb
> Author: Avinash Jayakar <[email protected]>
> Date:   Wed Jun 10 12:46:50 2026 +0530
>
>     match.pd: Recognize integer spaceship operator patterns
>
> caused
>
> FAIL: gcc.dg/spaceship_mixed_variants.c scan-tree-dump-times optimized "\\.SPACESHIP \\([^,]+, [^,]+, -1\\)" 64
>
> with GCC configured with
>
> ../../gcc/configure --prefix=/export/users3/haochenj/src/gcc-bisect/master/master/r17-1582/usr --enable-clocale=gnu --with-system-zlib --with-demangler-in-ld --with-fpmath=sse --enable-languages=c,c++,fortran --enable-cet --without-isl --enable-libmpx x86_64-linux --disable-bootstrap
>
> To reproduce:
>
> $ cd {build_dir}/gcc && make check RUNTESTFLAGS="dg.exp=gcc.dg/spaceship_mixed_variants.c --target_board='unix{-m32}'"
> $ cd {build_dir}/gcc && make check RUNTESTFLAGS="dg.exp=gcc.dg/spaceship_mixed_variants.c --target_board='unix{-m32\ -march=cascadelake}'"

I see what I missed in the review here; spaceship_mixed_variants.c
will fail for ilp32 targets. And maybe for int16 targets.
We should split up spaceship_mixed_variants.c into a part that does
not have `long long` in it and one which has `long long` in it.
and run the `long long` part only for !ilp32 && !int16 targets.
That would fix the issue here.

Thanks,
Andrea

>
> (Please directly reply to this email for question about this report.)
> (If you met problems with cascadelake related, disabling AVX512F in command line might save that.)
> (However, please make sure that there is no potential problems with AVX512.)