--- old/src/cpu/x86/vm/c1_MacroAssembler_x86.cpp	2014-04-24 15:52:59.000000000 -1000
+++ new/src/cpu/x86/vm/c1_MacroAssembler_x86.cpp	2014-04-24 15:52:58.000000000 -1000
@@ -148,7 +148,7 @@
 
 void C1_MacroAssembler::initialize_header(Register obj, Register klass, Register len, Register t1, Register t2) {
   assert_different_registers(obj, klass, len);
-  if (UseBiasedLocking && !len->is_valid()) {
+  if (UseBiasedLocking && !len.is_valid()) {
     assert_different_registers(obj, klass, len, t1, t2);
     movptr(t1, Address(klass, Klass::prototype_header_offset()));
     movptr(Address(obj, oopDesc::mark_offset_in_bytes()), t1);
@@ -167,7 +167,7 @@
     movptr(Address(obj, oopDesc::klass_offset_in_bytes()), klass);
   }
 
-  if (len->is_valid()) {
+  if (len.is_valid()) {
     movl(Address(obj, arrayOopDesc::length_offset_in_bytes()), len);
   }
 #ifdef _LP64