--- a/gcc/gimple.h	Sun Aug 21 22:22:32 2011 +0900
+++ b/gcc/gimple.h	Mon Aug 22 01:54:47 2011 +0900
@@ -102,6 +102,9 @@
     GF_CALL_TAILCALL		= 1 << 3,
     GF_CALL_VA_ARG_PACK		= 1 << 4,
     GF_CALL_NOTHROW		= 1 << 5,
+#ifndef noCbC
+	GF_CALL_CBC_GOTO		= 1 << 5,
+#endif
     GF_OMP_PARALLEL_COMBINED	= 1 << 0,
 
     /* True on an GIMPLE_OMP_RETURN statement if the return does not require
@@ -2172,6 +2175,21 @@
     s->gsbase.subcode &= ~GF_CALL_TAILCALL;
 }
 
+#ifndef noCbC
+/* If CBCGOTO_P is true, mark call statement S as being a cbc goto
+   (i.e., a call just before the exit of a function).  These calls are
+   candidate for tail call optimization.  */
+
+static inline void
+gimple_call_set_cbc_goto (gimple s, bool cbcgoto_p)
+{
+  GIMPLE_CHECK (s, GIMPLE_CALL);
+  if (cbcgoto_p)
+    s->gsbase.subcode |= GF_CALL_CBC_GOTO;
+  else
+    s->gsbase.subcode &= ~GF_CALL_CBC_GOTO;
+}
+#endif
 
 /* Return true if GIMPLE_CALL S is marked as a tail call.  */
 
@@ -2182,6 +2200,16 @@
   return (s->gsbase.subcode & GF_CALL_TAILCALL) != 0;
 }
 
+#ifndef noCbC
+/* Return true if GIMPLE_CALL S is marked as a cbc goto.  */
+
+static inline bool
+gimple_call_cbc_goto_p (gimple s)
+{
+  GIMPLE_CHECK (s, GIMPLE_CALL);
+  return (s->gsbase.subcode & GF_CALL_CBC_GOTO) != 0;
+}
+#endif
 
 /* Set the inlinable status of GIMPLE_CALL S to INLINABLE_P.  */