diff -r ec98e58952b2 -r 8a02ca5e5576 src/cpu/x86/vm/sharedRuntime_x86_64.cpp
--- a/src/cpu/x86/vm/sharedRuntime_x86_64.cpp	Tue Sep 11 14:59:23 2012 +0200
+++ b/src/cpu/x86/vm/sharedRuntime_x86_64.cpp	Tue Sep 11 16:20:57 2012 +0200
@@ -903,6 +903,7 @@
       case T_OBJECT:
       case T_ARRAY:
       case T_ADDRESS:
+      case T_METADATA:
         if (int_args < Argument::n_int_register_parameters_c) {
           regs[i].set2(INT_ArgReg[int_args++]->as_VMReg());
 #ifdef _WIN64