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tinfo.h (__user_type_info::contained_virtual_p): New predicate.

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* tinfo.h (__user_type_info::contained_virtual_p): New
	predicate.
	* tinfo.cc (__user_type_info::do_upcast): Fix bug with diamond
	shaped heirarchy.
	(__vmi_class_type_info::__do_upcast): Fix bug with NULL pointer to
	diamond shaped heirarchy. Add early out for mixed diamond and
	duplicate shaped heirarchy.

From-SVN: r34163
This commit is contained in:
Nathan Sidwell 2000-05-25 11:13:17 +00:00 committed by Nathan Sidwell
parent bf93f43bb4
commit e2e11048ae
3 changed files with 24 additions and 2 deletions
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10
gcc/cp/ChangeLog
View File

@ -1,3 +1,13 @@
2000-05-25 Nathan Sidwell <nathan@codesourcery.com>
* tinfo.h (__user_type_info::contained_virtual_p): New
predicate.
* tinfo.cc (__user_type_info::do_upcast): Fix bug with diamond
shaped heirarchy.
(__vmi_class_type_info::__do_upcast): Fix bug with NULL pointer to
diamond shaped heirarchy. Add early out for mixed diamond and
duplicate shaped heirarchy.
2000-05-24 Mark Mitchell <mark@codesourcery.com>
* cp-tree.h (build_delete): Change prototype.

11
gcc/cp/tinfo.cc
View File

@ -286,7 +286,8 @@ do_upcast (sub_kind access_path,
sub_access = sub_kind (sub_access | contained_virtual_mask);
if (base_list[i].access != PUBLIC)
sub_access = sub_kind (sub_access & ~contained_public_mask);
if (base_list[i].base->do_upcast (sub_access, target, p, result2))
if (base_list[i].base->do_upcast (sub_access, target, p, result2)
&& !contained_virtual_p (result2.whole2target))
return true; // must fail
if (result2.base_type)
{
@ -321,6 +322,8 @@ do_upcast (sub_kind access_path,
result.whole2target = contained_ambig;
return true;
}
result.whole2target
= sub_kind (result.whole2target | result2.whole2target);
}
}
}
@ -1095,8 +1098,10 @@ __do_upcast (const __class_type_info *dst, const void *obj_ptr,
}
else
{
if (!virtual_p (result.part2dst))
return true; // cannot have another path
if (!(vmi_flags & diamond_shaped_mask))
return true; // cannot have a more accessible base
return true; // cannot have a more accessible path
}
}
else if (result.dst_ptr != result2.dst_ptr)
@ -1125,6 +1130,8 @@ __do_upcast (const __class_type_info *dst, const void *obj_ptr,
result.part2dst = __contained_ambig;
return true;
}
result.part2dst
= __sub_kind (result.part2dst | result2.part2dst);
}
}
}

5
gcc/cp/tinfo.h
View File

@ -79,6 +79,11 @@ struct __user_type_info : public std::type_info {
return (access_path & (contained_mask | contained_virtual_mask))
== contained_mask;
}
static inline bool contained_virtual_p (sub_kind access_path)
{
return (access_path & (contained_mask | contained_virtual_mask))
== (contained_mask | contained_virtual_mask);
}
struct upcast_result
{