[Bug c++/70744] preincrements possibly double-evaluated in GNU ternaries

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70744

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |wrong-code
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2016-04-21
     Ever confirmed|0                           |1
      Known to fail|                            |4.3.5, 7.0

--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed.

;; Function int main() (null)
;; enabled by -tree-original


{
  int x = 1;

  <<cleanup_point   int x = 1;>>;
  <<cleanup_point <<< Unknown tree: expr_stmt
  if ( ++x != 0)
    {
      (void)  ++x;
    }
  else
    {
      <<< Unknown tree: void_cst >>>
    } >>>>>;
  return <retval> = x;
}