[Bug c++/80456] calling constexpr member function from volatile-qualified member function: error: ‘this’ is not a constant expression

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80456

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |jakub at gcc dot gnu.org,
                   |                            |jason at gcc dot gnu.org

--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
The test() call is represented as *(volatile struct A *) this, A::test () and
the *this dereference in that case is what triggers the error (well, this
itself).
This is created by:
8827                  /* In an expression of the form `a->f()' where `f' turns
8828                     out to be a static member function, `a' is
8829                     none-the-less evaluated.  */
8830                  if (TREE_CODE (TREE_TYPE (fn)) != METHOD_TYPE
8831                      && !is_dummy_object (instance)
8832                      && TREE_SIDE_EFFECTS (instance))
8833                    call = build2 (COMPOUND_EXPR, TREE_TYPE (call),
8834                                   instance, call);

So shall we have some exception of *this if it is volatile and still ignore it?