diff -r 7fd047780d47 -r a326d528f3e1 hotspot/src/share/vm/runtime/sharedRuntime.cpp
--- a/hotspot/src/share/vm/runtime/sharedRuntime.cpp	Fri Sep 14 22:00:41 2012 -0700
+++ b/hotspot/src/share/vm/runtime/sharedRuntime.cpp	Mon Sep 17 12:57:58 2012 -0700
@@ -1618,6 +1618,31 @@
   return callee_method;
 }
 
+#ifdef ASSERT
+void SharedRuntime::check_member_name_argument_is_last_argument(methodHandle method,
+                                                                const BasicType* sig_bt,
+                                                                const VMRegPair* regs) {
+  ResourceMark rm;
+  const int total_args_passed = method->size_of_parameters();
+  const VMRegPair*    regs_with_member_name = regs;
+        VMRegPair* regs_without_member_name = NEW_RESOURCE_ARRAY(VMRegPair, total_args_passed - 1);
+
+  const int member_arg_pos = total_args_passed - 1;
+  assert(member_arg_pos >= 0 && member_arg_pos < total_args_passed, "oob");
+  assert(sig_bt[member_arg_pos] == T_OBJECT, "dispatch argument must be an object");
+
+  const bool is_outgoing = method->is_method_handle_intrinsic();
+  int comp_args_on_stack = java_calling_convention(sig_bt, regs_without_member_name, total_args_passed - 1, is_outgoing);
+
+  for (int i = 0; i < member_arg_pos; i++) {
+    VMReg a =    regs_with_member_name[i].first();
+    VMReg b = regs_without_member_name[i].first();
+    assert(a->value() == b->value(), err_msg_res("register allocation mismatch: a=%d, b=%d", a->value(), b->value()));
+  }
+  assert(regs_with_member_name[member_arg_pos].first()->is_valid(), "bad member arg");
+}
+#endif
+
 // ---------------------------------------------------------------------------
 // We are calling the interpreter via a c2i. Normally this would mean that
 // we were called by a compiled method. However we could have lost a race
@@ -2546,10 +2571,10 @@
       MacroAssembler _masm(&buffer);
 
       // Fill in the signature array, for the calling-convention call.
-      int total_args_passed = method->size_of_parameters();
-
-      BasicType* sig_bt = NEW_RESOURCE_ARRAY(BasicType,total_args_passed);
-      VMRegPair*   regs = NEW_RESOURCE_ARRAY(VMRegPair,total_args_passed);
+      const int total_args_passed = method->size_of_parameters();
+
+      BasicType* sig_bt = NEW_RESOURCE_ARRAY(BasicType, total_args_passed);
+      VMRegPair*   regs = NEW_RESOURCE_ARRAY(VMRegPair, total_args_passed);
       int i=0;
       if( !method->is_static() )  // Pass in receiver first
         sig_bt[i++] = T_OBJECT;
@@ -2559,7 +2584,7 @@
         if( ss.type() == T_LONG || ss.type() == T_DOUBLE )
           sig_bt[i++] = T_VOID;   // Longs & doubles take 2 Java slots
       }
-      assert( i==total_args_passed, "" );
+      assert(i == total_args_passed, "");
       BasicType ret_type = ss.type();
 
       // Now get the compiled-Java layout as input (or output) arguments.
@@ -2572,9 +2597,8 @@
       nm = SharedRuntime::generate_native_wrapper(&_masm,
                                                   method,
                                                   compile_id,
-                                                  total_args_passed,
-                                                  comp_args_on_stack,
-                                                  sig_bt,regs,
+                                                  sig_bt,
+                                                  regs,
                                                   ret_type);
     }
   }