http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50960
--- Comment #17 from Richard Guenther <rguenth at gcc dot gnu.org> 2011-11-03
14:34:02 UTC ---
(In reply to comment #16)
> (In reply to comment #11)
> > (In reply to comment #9)
> > > FAIL: gfortran.dg/extends_type_of_1.f03 -O0 (internal compiler error)
> > > FAIL: gfortran.dg/extends_type_of_3.f90 -O (internal compiler error)
> >
> > These two fail with:
> >
> > internal compiler error: in fold_convert_loc, at fold-const.c:1894
> >
> > Not quite sure what goes wrong there. Some typing problem?
> >
> >
> > Reduced test case:
> >
> > type :: t1
> > end type
> >
> > type, extends(t1) :: t2
> > end type
> >
> > class(t1), pointer :: c1
> > type(t2) :: y
> >
> > if (.not. extends_type_of (y, c1)) call abort()
> >
> > end
>
> Looks like you are converting struct __vtype_MAIN___T1 to
> struct __vtype_MAIN___T1 *. Thus probably too many TREE_TYPE ()
> wrappers somewhere or a forgotten address-taking.
>
> Called from
>
> 4608 {
> 4609 /* Scalar pointers. */
> 4610 se.want_pointer = 1;
> 4611 gfc_conv_expr (&se, expr);
> 4612 gfc_add_block_to_block (&block, &se.pre);
> 4613 gfc_add_modify (&block, dest,
> 4614 fold_convert (TREE_TYPE (dest),
> se.expr))
>
> where se.want_pointer (whatever it means) is not honored and se.expr
> is a variable of type struct __vtype_MAIN___T1.
Missing handling of se.want_pointer at least here:
void
gfc_conv_structure (gfc_se * se, gfc_expr * expr, int init)
{
...
if (!init)
{
/* Create a temporary variable and fill it in. */
se->expr = gfc_create_var (type, expr->ts.u.derived->name);
tmp = gfc_trans_structure_assign (se->expr, expr);
gfc_add_expr_to_block (&se->pre, tmp);
return;
but what's the desire of the caller? Is it to get &expr? Something
seems to be seriously wrong.
