[Bug c++/61872] Assigning to "long double" causes memset to be improperly elided

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61872

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |wrong-code
             Status|UNCONFIRMED                 |ASSIGNED
   Last reconfirmed|                            |2014-07-23
           Assignee|unassigned at gcc dot gnu.org      |rguenth at gcc dot 
gnu.org
     Ever confirmed|0                           |1

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

int main()
{
  long double a;
  __builtin_memset(&a, '\0', sizeof(long double));
  a = 1.0;

  long double b;
  __builtin_memset(&b, '\0', sizeof(long double));
  b = 1.0;

  if (__builtin_memcmp(&a, &b, sizeof(long double)))
    __builtin_abort ();
  return 0;
}