[Bug target/110227] [13/14 Regression] gcc generates invalid AVX-512 code

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110227

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|---                         |13.2
   Last reconfirmed|                            |2023-06-12
     Ever confirmed|0                           |1
            Summary|gcc generates invalid       |[13/14 Regression] gcc
                   |AVX-512 code                |generates invalid AVX-512
                   |                            |code
             Status|UNCONFIRMED                 |NEW

--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Semi-Reduced testcase:
```
#include <immintrin.h>

void f()
{
  __m256i mask = _mm256_set_epi32(0, 0, 0, 0, -1, -1, -1, -1);
  register __m256i reg asm("xmm16") = mask;
  asm(""::"v"(reg));
}
```

Most likely introduced by r13-2804-ga282f086ef26d9 .