tm.texi.in (TARGET_OBJC_DECLARE_UNRESOLVED_CLASS_REFERENCE, [...]): Add @hooks.

gcc/
	* doc/tm.texi.in (TARGET_OBJC_DECLARE_UNRESOLVED_CLASS_REFERENCE,
	TARGET_OBJC_DECLARE_CLASS_DEFINITION): Add @hooks.
	(ASM_DECLARE_CLASS_REFERENCE, ASM_DECLARE_UNRESOLVED_REFERENCE):
	Remove.
	* doc/tm.texi: Regenerate.
	* config/darwin.h (ASM_OUTPUT_LABELREF): Remove special case for
	.objc_class_name_*.
	* config/darwin-c.c: Include target.h.
	(darwin_objc_declare_unresolved_class_reference): New function.
	(darwin_objc_declare_class_definition): New function.
	(TARGET_OBJC_DECLARE_UNRESOLVED_CLASS_REFERENCE): Define.
	(TARGET_OBJC_DECLARE_CLASS_DEFINITION): Define.

c-family/
	* c-target.def (objc_declare_unresolved_class_reference,
	objc_declare_class_definition): Add new hooks.

objc/
	* objc-next-runtime-abi-01.c: Do not include tm.h and output.h.
	Include c-family/c-target.h.
	(handle_next_class_ref): Rewrite to emit top-level asm statements.
	(handle_next_impent): Likewise.
	* objc/Make-lang.in: Fix dependencies for objc-next-runtime-abi-01.o.

From-SVN: r188793

1 files changed, 52 insertions, 3 deletions

diff --git a/gcc/config/darwin-c.c b/gcc/config/darwin-c.c
index 08de2f8..a642f66 100644
--- a/gcc/config/darwin-c.c
+++ b/gcc/config/darwin-c.c
@@ -25,6 +25,7 @@ along with GCC; see the file COPYING3.  If not see
 #include "tm.h"
 #include "cpplib.h"
 #include "tree.h"
+#include "target.h"
 #include "incpath.h"
 #include "c-family/c-common.h"
 #include "c-family/c-pragma.h"
@@ -36,6 +37,7 @@ along with GCC; see the file COPYING3.  If not see
 #include "prefix.h"
 #include "c-family/c-target.h"
 #include "c-family/c-target-def.h"
+#include "cgraph.h"
 
 /* Pragmas.  */
 
@@ -711,13 +713,60 @@ EXPORTED_CONST format_kind_info darwin_additional_format_types[] = {
   }
 };
 
-#undef TARGET_HANDLE_C_OPTION
+
+/* Support routines to dump the class references for NeXT ABI v1, aka
+   32-bits ObjC-2.0, as top-level asms.
+   The following two functions should only be called from
+   objc/objc-next-runtime-abi-01.c.  */
+
+static void
+darwin_objc_declare_unresolved_class_reference (const char *name)
+{
+  const char *lazy_reference = ".lazy_reference\t";
+  const char *hard_reference = ".reference\t";
+  const char *reference = MACHOPIC_INDIRECT ? lazy_reference : hard_reference;
+  size_t len = strlen (reference) + strlen(name) + 2;
+  char *buf = (char *) alloca (len);
+
+  gcc_checking_assert (!strncmp (name, ".objc_class_name_", 17));
+
+  snprintf (buf, len, "%s%s", reference, name);
+  add_asm_node (build_string (strlen (buf), buf));
+}
+
+static void
+darwin_objc_declare_class_definition (const char *name)
+{
+  const char *xname = targetm.strip_name_encoding (name);
+  size_t len = strlen (xname) + 7 + 5;
+  char *buf = (char *) alloca (len);
+
+  gcc_checking_assert (!strncmp (name, ".objc_class_name_", 17)
+		       || !strncmp (name, "*.objc_category_name_", 21));
+
+  /* Mimic default_globalize_label.  */
+  snprintf (buf, len, ".globl\t%s", xname);
+  add_asm_node (build_string (strlen (buf), buf));
+
+  snprintf (buf, len, "%s = 0", xname);
+  add_asm_node (build_string (strlen (buf), buf));
+}
+
+#undef  TARGET_HANDLE_C_OPTION
 #define TARGET_HANDLE_C_OPTION handle_c_option
 
-#undef TARGET_OBJC_CONSTRUCT_STRING_OBJECT
+#undef  TARGET_OBJC_CONSTRUCT_STRING_OBJECT
 #define TARGET_OBJC_CONSTRUCT_STRING_OBJECT darwin_objc_construct_string
 
-#undef TARGET_STRING_OBJECT_REF_TYPE_P
+#undef  TARGET_OBJC_DECLARE_UNRESOLVED_CLASS_REFERENCE
+#define TARGET_OBJC_DECLARE_UNRESOLVED_CLASS_REFERENCE \
+	darwin_objc_declare_unresolved_class_reference
+
+#undef  TARGET_OBJC_DECLARE_CLASS_DEFINITION
+#define TARGET_OBJC_DECLARE_CLASS_DEFINITION \
+	darwin_objc_declare_class_definition
+
+#undef  TARGET_STRING_OBJECT_REF_TYPE_P
 #define TARGET_STRING_OBJECT_REF_TYPE_P darwin_cfstring_ref_p
 
 #undef TARGET_CHECK_STRING_OBJECT_FORMAT_ARG