--- old/src/cpu/x86/vm/c1_LIRAssembler_x86.cpp	2011-12-07 12:03:21.000000000 +0100
+++ new/src/cpu/x86/vm/c1_LIRAssembler_x86.cpp	2011-12-07 12:03:21.000000000 +0100
@@ -1558,7 +1558,7 @@
 void LIR_Assembler::emit_alloc_obj(LIR_OpAllocObj* op) {
   if (op->init_check()) {
     __ cmpl(Address(op->klass()->as_register(),
-                    instanceKlass::init_state_offset_in_bytes() + sizeof(oopDesc)),
+                    instanceKlass::init_state_offset_in_bytes()),
             instanceKlass::fully_initialized);
     add_debug_info_for_null_check_here(op->stub()->info());
     __ jcc(Assembler::notEqual, *op->stub()->entry());
@@ -1730,7 +1730,7 @@
 #else
       __ cmpoop(Address(klass_RInfo, k->super_check_offset()), k->constant_encoding());
 #endif // _LP64
-      if (sizeof(oopDesc) + Klass::secondary_super_cache_offset_in_bytes() != k->super_check_offset()) {
+      if (Klass::secondary_super_cache_offset_in_bytes() != (int) k->super_check_offset()) {
         __ jcc(Assembler::notEqual, *failure_target);
         // successful cast, fall through to profile or jump
       } else {
@@ -1842,7 +1842,7 @@
     __ load_klass(klass_RInfo, value);
 
     // get instance klass (it's already uncompressed)
-    __ movptr(k_RInfo, Address(k_RInfo, objArrayKlass::element_klass_offset_in_bytes() + sizeof(oopDesc)));
+    __ movptr(k_RInfo, Address(k_RInfo, objArrayKlass::element_klass_offset_in_bytes()));
     // perform the fast part of the checking logic
     __ check_klass_subtype_fast_path(klass_RInfo, k_RInfo, Rtmp1, success_target, failure_target, NULL);
     // call out-of-line instance of __ check_klass_subtype_slow_path(...):
@@ -3289,8 +3289,7 @@
           } else if (!(flags & LIR_OpArrayCopy::dst_objarray)) {
             __ load_klass(tmp, dst);
           }
-          int lh_offset = klassOopDesc::header_size() * HeapWordSize +
-            Klass::layout_helper_offset_in_bytes();
+          int lh_offset = Klass::layout_helper_offset_in_bytes();
           Address klass_lh_addr(tmp, lh_offset);
           jint objArray_lh = Klass::array_layout_helper(T_OBJECT);
           __ cmpl(klass_lh_addr, objArray_lh);
@@ -3307,9 +3306,9 @@
 
 #ifndef _LP64
         __ movptr(tmp, dst_klass_addr);
-        __ movptr(tmp, Address(tmp, objArrayKlass::element_klass_offset_in_bytes() + sizeof(oopDesc)));
+        __ movptr(tmp, Address(tmp, objArrayKlass::element_klass_offset_in_bytes()));
         __ push(tmp);
-        __ movl(tmp, Address(tmp, Klass::super_check_offset_offset_in_bytes() + sizeof(oopDesc)));
+        __ movl(tmp, Address(tmp, Klass::super_check_offset_offset_in_bytes()));
         __ push(tmp);
         __ push(length);
         __ lea(tmp, Address(dst, dst_pos, scale, arrayOopDesc::base_offset_in_bytes(basic_type)));
@@ -3333,15 +3332,15 @@
         // Allocate abi space for args but be sure to keep stack aligned
         __ subptr(rsp, 6*wordSize);
         __ load_klass(c_rarg3, dst);
-        __ movptr(c_rarg3, Address(c_rarg3, objArrayKlass::element_klass_offset_in_bytes() + sizeof(oopDesc)));
+        __ movptr(c_rarg3, Address(c_rarg3, objArrayKlass::element_klass_offset_in_bytes()));
         store_parameter(c_rarg3, 4);
-        __ movl(c_rarg3, Address(c_rarg3, Klass::super_check_offset_offset_in_bytes() + sizeof(oopDesc)));
+        __ movl(c_rarg3, Address(c_rarg3, Klass::super_check_offset_offset_in_bytes()));
         __ call(RuntimeAddress(copyfunc_addr));
         __ addptr(rsp, 6*wordSize);
 #else
         __ load_klass(c_rarg4, dst);
-        __ movptr(c_rarg4, Address(c_rarg4, objArrayKlass::element_klass_offset_in_bytes() + sizeof(oopDesc)));
-        __ movl(c_rarg3, Address(c_rarg4, Klass::super_check_offset_offset_in_bytes() + sizeof(oopDesc)));
+        __ movptr(c_rarg4, Address(c_rarg4, objArrayKlass::element_klass_offset_in_bytes()));
+        __ movl(c_rarg3, Address(c_rarg4, Klass::super_check_offset_offset_in_bytes()));
         __ call(RuntimeAddress(copyfunc_addr));
 #endif