[Bug c++/120409] FAIL: g++.dg/coroutines/torture/pr119916.C

[iains at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120409

--- Comment #5 from Iain Sandoe <iains at gcc dot gnu.org> ---
well .. the visible difference in gimple, but this is code outside of the
coroutines changes (i.e. just a bit of regular C++).

However, it does seem we create the return object correctly .. and then return
an empty one.  We seem to be failing to do copy elision.

(I have not analysed the mx32 case any further - but doing tests on BE Power
target)

sparc9-solaris:
struct OptionalPromiseReturn folly::OptionalPromise::get_return_object (struct
OptionalPromise * const this)
{
  struct OptionalPromiseReturn D.9045;
  struct OptionalPromiseReturn D.8785;

  try
    {
      folly::OptionalPromiseReturn::OptionalPromiseReturn (&D.8785, this);
      D.9045 = D.8785;
      return D.9045;
    }
  finally
    {
      D.8785 = {CLOBBER(eos)};
    }
}

====

x86_64-darwin

struct OptionalPromiseReturn folly::OptionalPromise::get_return_object (struct
OptionalPromise * const this)
{
  folly::OptionalPromiseReturn::OptionalPromiseReturn (&<retval>, this);
  return <retval>;
}