------- Comment #14 from rguenth at gcc dot gnu dot org 2010-02-14 10:40
-------
Err, you can't simply adjust a types main variant like
t = build_cplus_array_type_1 (element_type, TYPE_DOMAIN (type));
if (TYPE_MAIN_VARIANT (t) != TYPE_MAIN_VARIANT (type))
{
/* Set the main variant of the newly-created ARRAY_TYPE
(with cv-qualified element type) to the main variant of
the unqualified ARRAY_TYPE we started with. */
as types are shared and build_cplus_array_type_1 can return an already
existing type.
I suppose the hashing machinery isn't working well with multidimensional
array types.
A way out is to build a distinct type copy here in the
TYPE_MAIN_VARIANT (t) != TYPE_MAIN_VARIANT (type) case. Though you have
to watch out for proper TYPE_CANONICAL.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43036
