diff options
Diffstat (limited to 'gcc/cp/cp-tree.h')
| -rw-r--r-- | gcc/cp/cp-tree.h | 23 |
1 files changed, 18 insertions, 5 deletions
diff --git a/gcc/cp/cp-tree.h b/gcc/cp/cp-tree.h index 3708dfa60b9..995bc516694 100644 --- a/gcc/cp/cp-tree.h +++ b/gcc/cp/cp-tree.h @@ -1382,13 +1382,26 @@ struct lang_type nested member class templates. */ #define CLASSTYPE_TAGS(NODE) (TYPE_LANG_SPECIFIC(NODE)->tags) -/* If this class has any bases, this is the number of the base class from - which our VFIELD is based, -1 otherwise. If this class has no base - classes, this is not used. - In D : B1, B2, PARENT would be 0, if D's vtable came from B1, - 1, if D's vtable came from B2. */ +/* If this value is non-negative, it is the index (in the + TYPE_BINFO_BASETYPES) for the base-class whose vtable pointer we + are reusing. For example, in D : B1, B2, PARENT would be 0, if D's + vtable came from B1, 1, if D's vtable came from B2. */ #define CLASSTYPE_VFIELD_PARENT(NODE) (TYPE_LANG_SPECIFIC(NODE)->vfield_parent) +/* Nonzero if NODE has a primary base class, i.e., a base class with + which it shares the virtual fucntion table pointer. */ +#define CLASSTYPE_HAS_PRIMARY_BASE_P(NODE) \ + (CLASSTYPE_VFIELD_PARENT (NODE) != -1) + +/* If non-NULL, this is the binfo for the primary base class, i.e., + the base class which contains the virtual function table pointer + for this class. */ +#define CLASSTYPE_PRIMARY_BINFO(NODE) \ + (CLASSTYPE_HAS_PRIMARY_BASE_P (NODE) \ + ? TREE_VEC_ELT (TYPE_BINFO_BASETYPES (NODE), \ + CLASSTYPE_VFIELD_PARENT (NODE)) \ + : NULL_TREE) + /* The number of virtual functions defined for this _CLASSTYPE node. */ #define CLASSTYPE_VSIZE(NODE) (TYPE_LANG_SPECIFIC(NODE)->vsize) |