[Bug middle-end/66127] Division by zero gets folded away

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66127

--- Comment #8 from Richard Biener <rguenth at gcc dot gnu.org> ---
Where I get for the testcase

    int z = 0;
    int a = 1, 0;
  return a;

for some odd reason (1?! ... fold_ignored_results fault...)