* c-decl.c: Verify that C_SIZEOF_STRUCT_LANG_IDENTIFIER is correct.

	(struct c_binding, struct c_scope): Add chain_next
	attributes to GTY markers.
	(struct lang_identifier, struct lang_tree_node): Define
	here...
	* c-tree.h: ... not here.  No longer need to declare struct
	c_binding either.  Do define C_SIZEOF_STRUCT_LANG_IDENTIFIER.
	* c-lang.c, objc/objc-lang.c: Set LANG_HOOKS_IDENTIFIER_SIZE
	to C_SIZEOF_STRUCT_LANG_IDENTIFIER.

	PR 14734, 11944
	* c-decl.c (get_parm_info): If error_mark_node is encountered
	in the bindings chain, unbind and discard it; don't abort.
	* testsuite/gcc.dg/noncompile/undeclared-2.c: New test.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@80042 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 4 insertions, 28 deletions

diff --git a/gcc/c-tree.h b/gcc/c-tree.h
index eb167ca050e..01f86e999f2 100644
--- a/gcc/c-tree.h
+++ b/gcc/c-tree.h
@@ -24,34 +24,10 @@ Software Foundation, 59 Temple Place - Suite 330, Boston, MA
 
 #include "c-common.h"
 
-/* Each C symbol points to three linked lists of c_binding structures.
-   These describe the values of the identifier in the three different
-   namespaces defined by the language.  The contents of these lists
-   are private to c-decl.c.  */
-
-struct c_binding;
-
-/* Language-dependent contents of an identifier.  */
-
-struct lang_identifier GTY(())
-{
-  struct c_common_identifier common_id;
-  struct c_binding *symbol_binding; /* vars, funcs, constants, typedefs */
-  struct c_binding *tag_binding;    /* struct/union/enum tags */
-  struct c_binding *label_binding;  /* labels */
-};
-
-/* The resulting tree type.  */
-
-union lang_tree_node
-  GTY((desc ("TREE_CODE (&%h.generic) == IDENTIFIER_NODE"),
-       chain_next ("TREE_CODE (&%h.generic) == INTEGER_TYPE ? (union lang_tree_node *)TYPE_NEXT_VARIANT (&%h.generic) : (union lang_tree_node *)TREE_CHAIN (&%h.generic)")))
-{
-  union tree_node GTY ((tag ("0"),
-			desc ("tree_node_structure (&%h)")))
-    generic;
-  struct lang_identifier GTY ((tag ("1"))) identifier;
-};
+/* struct lang_identifier is private to c-decl.c, but langhooks.c needs to
+   know how big it is.  This is sanity-checked in c-decl.c.  */
+#define C_SIZEOF_STRUCT_LANG_IDENTIFIER \
+  (sizeof (struct c_common_identifier) + 3 * sizeof (void *))
 
 /* Language-specific declaration information.  */