[Bug debug/67192] [6 Regression] Backward-goto in loop can get wrong line number

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67192

--- Comment #18 from Richard Biener <rguenth at gcc dot gnu.org> ---
The "simpler" progression seems to be to remove code like

  if (CAN_HAVE_LOCATION_P (t) && code != LABEL_EXPR)
    {
      if (!EXPR_HAS_LOCATION (t))
        SET_EXPR_LOCATION (t, input_location);
    }

esp. code using input_location "delayed".