On Fri, 2005-09-30 at 16:53 +0200, Olivier Hainque wrote: > Daniel Berlin wrote: > > Well, doesn't the pointed-to type have set 0 because of > > TYPE_REF_CAN_ALIAS_ALL (or whatever it's named :P)? > > Not quite: the pointer type has TYPE_REF_CAN_ALIAS_ALL, not the > pointed-to type: > > /* Nonzero in a pointer or reference type means the data pointed to > by this type can alias anything. */ > #define TYPE_REF_CAN_ALIAS_ALL(NODE) \ > (PTR_OR_REF_CHECK (NODE)->common.static_flag) > > It seems to me that get_tmt does not do the right thing today > because it assigns the tag alias set from the alias set of the > pointed-to type, even if CAN_ALIAS_ALL is set on the pointer type.
Uh, CAN_ALIAS_ALL seems like a very bad hack then. You should simply be creating a pointed-to type that aliases set 0, and using that for the pointed to type. That is, after all, what alias set 0 is for.
