[Bug middle-end/112344] [14 Regression] Wrong code at -O2 on x86_64-pc-linux-gnu

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112344

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |jakub at gcc dot gnu.org
           Keywords|needs-bisection             |
             Status|WAITING                     |NEW

--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Bisection shows this started with
r14-4089-gd45ddc2c04e471d0dcee016b6edacc00b8341b16
and still reproduces on latest trunk.
-fsanitize=undefined doesn't report anything.
Slightly cleaned up:
int
main ()
{
  long long b = 2036854775807LL;
  signed char c = 3;
  short d = 0;
  int e = -2147483647 - 1, f;
  for (f = 0; f < 7; f++)
    while (e < 20)
      {
        e += 2;
        d = c -= b;
      }
  if (d != 13)
    __builtin_abort ();
}