Handle anonymous unions at the tree level.

        C++ ABI change: Mangle anonymous unions using the name of their
        first named field (by depth-first search).  Should not cause
        binary compatibility problems, though, as the compiler previously
        didn't emit anything for affected unions.
        * cp-tree.def (ALIAS_DECL): New tree code.
        * decl2.c (build_anon_union_vars): Build ALIAS_DECLs.  Return the
        first field, not the largest.
        (finish_anon_union): Don't mess with RTL.  Do set DECL_ASSEMBLER_NAME,
        push the decl, and write it out at namespace scope.
        * decl.c (lookup_name_real): See through an ALIAS_DECL.
        (pushdecl): Add namespace bindings for ALIAS_DECLs.
        * rtti.c (unemitted_tinfo_decl_p): Don't try to look at the name
        of a decl which doesn't have one.
        * typeck.c (build_class_member_access_expr): Don't recurse if
        we already have the type we want.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@60314 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 3 insertions, 1 deletions

diff --git a/gcc/cp/rtti.c b/gcc/cp/rtti.c
index d8041ab53e4..495e0d4576a 100644
--- a/gcc/cp/rtti.c
+++ b/gcc/cp/rtti.c
@@ -1444,7 +1444,9 @@ unemitted_tinfo_decl_p (t, data)
 {
   if (/* It's a var decl */
       TREE_CODE (t) == VAR_DECL
-      /* whos name points back to itself */
+      /* which has a name */
+      && DECL_NAME (t)
+      /* whose name points back to itself */
       && IDENTIFIER_GLOBAL_VALUE (DECL_NAME (t)) == t
       /* whose name's type is non-null */
       && TREE_TYPE (DECL_NAME (t))