[Bug middle-end/97073] [8/9/10/11 Regression] Miscompilation with -m32 -O1 -march=i686

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97073

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |jakub at gcc dot gnu.org

--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Shorter testcase:

typedef unsigned long long L;
union U { L i; struct T { unsigned k; L l; } j; } u;

__attribute__((noinline,noclone)) void
foo (L x)
{
  u.j.l = u.i & x;
}

int
main ()
{
  u.i = 5;
  foo (-1ULL);
  if (u.j.l != 5)
    __builtin_abort ();
  return 0;
}

This broke in between r102000 (still good) and r104000 (already miscompiled),
so I don't believe that 6.3.1 worked.