[Bug c/86680] possible gcc optimization

[schwab@linux-m68k.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86680

Andreas Schwab <schwab@linux-m68k.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|WAITING                     |NEW

--- Comment #2 from Andreas Schwab <schwab@linux-m68k.org> ---
The extra insns are introduced in the ivopts pass.

  <bb 5> [local count: 105119325]:
  ivtmp.7_7 = (unsigned long) &__bss_start1;
  _11 = (unsigned long) &__bss_end1;
  _12 = _11 + 18446744073709551615;
  _13 = (unsigned long) &__bss_start1;
  _14 = _12 - _13;
  _15 = _14 & 18446744073709551608;
  _16 = (unsigned long) &__bss_start1;
  _17 = _16 + 8;
  _18 = _15 + _17;