http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52265
Bug #: 52265
Summary: [OOP] TREE dump confusing with nested SELECT TYPE
Classification: Unclassified
Product: gcc
Version: 4.7.0
Status: UNCONFIRMED
Keywords: diagnostic
Severity: normal
Priority: P3
Component: fortran
AssignedTo: [email protected]
ReportedBy: [email protected]
CC: [email protected]
The following program seems to work as expected, however, the dump is very
irritating:
switch (a._vptr->_hash)
{
case 6231989:;
__tmp_type_t = a._data;
{
struct t * __tmp_type_t;
switch (b._vptr->_hash)
{
case 6231989:;
__tmp_type_t = b._data;
*__tmp_type_t = *__tmp_type_t;
There are two variables called "__tmp_type_t", one pointing to a._data and the
other to b._data. Most striking is the last line where both variables occur.
That's very confusing and would be impossible to do in C, C++, or Fortran.
Expected: Use different variable names, e.g. via
gfc_create_var (type, "__tmp_type_t")
type t
integer :: i = 5
end type t
class(t), allocatable :: a, b
allocate(a,b)
b%i = 77
select type (a)
type is (t)
select type (b)
type is (t)
a = b
b%i = 88
end select
end select
if (a%i /= 77) call abort ()
if (a%i /= 88) call abort ()
end
