[PATCH] Canonical types (1/3)

[Ian Lance Taylor]

"Steven Bosscher" <stevenb.gcc@gmail.com> writes:

> On 11/28/06, Doug Gregor <doug.gregor@gmail.com> wrote:
> >         * tree.h (TYPE_CANONICAL): New.
> >         (TYPE_STRUCTURAL_EQUALITY): New.
> >         (struct tree_type): Added structural_equality, unused_bits,
> >         canonical fields.
> 
> If I understand your patches correctly, this stuff is only needed for
> the C-family languages.  So why steal two pointers on the generic
> struct tree_type?  Are you planning to make all front ends use these
> fields, or is it just additional bloat for e.g. Ada, Fortran, Java?
> ;-)

It seems to me that all the frontends should use these fields.
Hopefully we can use it as a lever to eliminate the types_compatible_p
langhook.

Ian