[Bug target/126450] [16/17 Regression] wrong code at -O2 -mavx2 since r16-8339

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=126450

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |hjl.tools at gmail dot com,
                   |                            |jakub at gcc dot gnu.org
           Priority|P3                          |P2
            Summary|[16/17 Regression] wrong    |[16/17 Regression] wrong
                   |code at -O2 -mavx2          |code at -O2 -mavx2 since
                   |                            |r16-8339
   Target Milestone|---                         |16.2
   Last reconfirmed|                            |2026-07-28
             Status|UNCONFIRMED                 |NEW
     Ever confirmed|0                           |1

--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Started with r16-8339-gb4c215b36d63e1c264d8c1bd5d34f9aef1bb8463
typedef int V [[gnu::vector_size (16)]];
long long a, b, c, d, e;
short f;
[[gnu::vector_size (8 * sizeof (int))]] int g;
V h;
_Bool i;

void
foo (V x)
{
  _Bool j = 0;
  short l = 0;
l1:
  b = l;
  x = h;
  l = c % 4;
  i = f = e % 6;
  e = x[j];
  g = g > g;
  if (d)
    goto l2;
l3:
  j = l;
  if (j)
    goto l1;
  a = l;
l2:
  if (e)
    goto l3;
}

int
main ()
{
  foo (h);
}