[Bug tree-optimization/80344] -Wuninitialized triggering on a ctor on ARM

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80344

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Target|                            |arm
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2017-04-07
     Ever confirmed|0                           |1

--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed.  The IL we warn about is

B::B() (struct B * const this)
{
  struct 
  {
    ._0 e;
    int i;
    int j;
  } D.4784;

  <bb 2> [100.00%]:
  D.4784 ={v} {CLOBBER};
  MEM[(struct  &)this_2(D)] = D.4784;
  return this_2(D);

and we warn about the MEM[(struct  &)this_2(D)] = D.4784; assignment.

The warning is clearly correct as the A members are not initialized.

Did you reduce a testcase too far?