[Bug target/79127] [7 Regression] Error: invalid register for .seh_savexmm in matmul_i4.c

[rainer@emrich-ebersheim.de]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79127

--- Comment #8 from Rainer Emrich <rainer@emrich-ebersheim.de> ---
(In reply to Jakub Jelinek from comment #6)
> Perhaps the HAVE_AVX512F configure test is too simple for the SEH purposes. 
> I've tried:
>         typedef double __m512d __attribute__ ((__vector_size__ (64)));
>         typedef double __m256d __attribute__ ((__vector_size__ (32)));
>         __m512d foo (__m512d, __m512d, __m512d, __m512d, __m512d, __m256d,
> __m512d, __m512d);
>         __m512d _mm512_add (__m512d a, __m256d c)
>         {
>           __m512d b =  __builtin_ia32_addpd512_mask (a, a, a, 1, 4);
>           __m512d f =  __builtin_ia32_addpd512_mask (b, a, a, 1, 4);
>           __m512d g =  __builtin_ia32_addpd512_mask (f, a, a, 1, 4);
>           __m512d h =  __builtin_ia32_addpd512_mask (g, a, a, 1, 4);
>           __m512d e = foo (b, a, b, a, b, c, b, b);
>           return __builtin_ia32_addpd512_mask (b, e, a, 1, 4) + f + g + h;
>         }
> int
> main ()
> {
> 
>   ;
>   return 0;
> }
> 
> but that still doesn't generate any .seh_savexmm directives (at least not in
> my cross-compiler).

In my case HAVE_AVX512F is set to 1 in libgfortran/config.h.