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| -rw-r--r-- | gcc/ChangeLog | 4 | ||||
| -rw-r--r-- | gcc/tree.h | 10 |
2 files changed, 11 insertions, 3 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index de4e190..dd85b95 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,7 @@ +2000-01-16 Mark Mitchell <mark@codesourcery.com> + + * tree.h (BINFO_VPTR_FIELD): Augment documentation. + 2000-01-16 Alexandre Oliva <oliva@lsd.ic.unicamp.br> * aclocal.m4 (AC_FUNC_MMAP_ZERO): New macro. @@ -1026,9 +1026,13 @@ struct tree_type #define BINFO_BASETYPE(NODE,N) TREE_VEC_ELT (BINFO_BASETYPES (NODE), (N)) #define TYPE_BINFO_BASETYPE(NODE,N) BINFO_TYPE (TREE_VEC_ELT (BINFO_BASETYPES (TYPE_BINFO (NODE)), (N))) -/* For a BINFO record describing an inheritance, this yields a pointer - to the artificial FIELD_DECL node which contains the "virtual base - class pointer" for the given inheritance. */ +/* For a BINFO record describing a virtual base class, i.e., one where + TREE_VIA_VIRTUAL is set, this field assists in locating the virtual + base. The actual contents are language-dependent. Under the old + ABI, the C++ front-end uses a FIELD_DECL whose contents are a + pointer to the virtual base; under the new ABI this field is + instead a INTEGER_CST giving an offset into the vtable where the + offset to the virtual base can be found. */ #define BINFO_VPTR_FIELD(NODE) TREE_VEC_ELT ((NODE), 5) /* The size of a base class subobject of this type. Not all frontends |