[Bug c++/23372] [4.0/4.1/4.2 Regression] Temporary aggregate copy not elided when passing parameters by value

["rguenth at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>]

------- Comment #33 from rguenth at gcc dot gnu dot org  2006-02-14 15:40 -------
The attached patch is bogus, and a correct one doesn't fix the first testcase
(as the attached one didn't, too).  As analyzed previously, expand does not
deal with

void g(A*) (a)
{
  struct A D.2007;

<bb 2>:
  D.2007 = *a_1;
  f (D.2007) [tail call];
  return;

}

and TER doesn't produce (non-gimple) f (*a).  Still TER looks like the only
place where we could get this fixed, because we still have dataflow
information left.  Also a real struct copyprop pass will not help here.
As TER / outof-ssa is not something I want to look into, unassigning this.


-- 

rguenth at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|rguenth at gcc dot gnu dot  |unassigned at gcc dot gnu
                   |org                         |dot org
             Status|ASSIGNED                    |NEW


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23372