diff -r 36d1d483d5d6 -r da91efe96a93 src/share/vm/opto/memnode.cpp
--- a/src/share/vm/opto/memnode.cpp	Fri Aug 31 16:39:35 2012 -0700
+++ b/src/share/vm/opto/memnode.cpp	Sat Sep 01 13:25:18 2012 -0400
@@ -841,7 +841,7 @@
 { return !Type::cmp( _type, ((LoadNode&)n)._type ); }
 const Type *LoadNode::bottom_type() const { return _type; }
 uint LoadNode::ideal_reg() const {
-  return Matcher::base2reg[_type->base()];
+  return _type->ideal_reg();
 }
 
 #ifndef PRODUCT
@@ -1660,7 +1660,7 @@
         return TypeInt::make(klass->super_check_offset());
       }
       // Compute index into primary_supers array
-      juint depth = (tkls->offset() - in_bytes(Klass::primary_supers_offset())) / sizeof(klassOop);
+      juint depth = (tkls->offset() - in_bytes(Klass::primary_supers_offset())) / sizeof(Klass*);
       // Check for overflowing; use unsigned compare to handle the negative case.
       if( depth < ciKlass::primary_super_limit() ) {
         // The field is an element of Klass::_primary_supers.  Return its (constant) value.
@@ -1690,13 +1690,13 @@
     // shallow enough depth.  Even though the klass is not exact, entries less
     // than or equal to its super depth are correct.
     if (klass->is_loaded() ) {
-      ciType *inner = klass->klass();
+      ciType *inner = klass;
       while( inner->is_obj_array_klass() )
         inner = inner->as_obj_array_klass()->base_element_type();
       if( inner->is_instance_klass() &&
           !inner->as_instance_klass()->flags().is_interface() ) {
         // Compute index into primary_supers array
-        juint depth = (tkls->offset() - in_bytes(Klass::primary_supers_offset())) / sizeof(klassOop);
+        juint depth = (tkls->offset() - in_bytes(Klass::primary_supers_offset())) / sizeof(Klass*);
         // Check for overflowing; use unsigned compare to handle the negative case.
         if( depth < ciKlass::primary_super_limit() &&
             depth <= klass->super_depth() ) { // allow self-depth checks to handle self-check case
@@ -1891,10 +1891,11 @@
   Compile* C = gvn.C;
   Node *ctl = NULL;
   // sanity check the alias category against the created node type
-  const TypeOopPtr *adr_type = adr->bottom_type()->isa_oopptr();
-  assert(adr_type != NULL, "expecting TypeOopPtr");
+  const TypePtr *adr_type = adr->bottom_type()->isa_ptr();
+  assert(adr_type != NULL, "expecting TypeKlassPtr");
 #ifdef _LP64
   if (adr_type->is_ptr_to_narrowoop()) {
+    assert(UseCompressedKlassPointers, "no compressed klasses");
     Node* load_klass = gvn.transform(new (C, 3) LoadNKlassNode(ctl, mem, adr, at, tk->make_narrowoop()));
     return new (C, 2) DecodeNNode(load_klass, load_klass->bottom_type()->make_ptr());
   }
@@ -2065,7 +2066,7 @@
     }
   }
 
-  // Simplify k.java_mirror.as_klass to plain k, where k is a klassOop.
+  // Simplify k.java_mirror.as_klass to plain k, where k is a Klass*.
   // Simplify ak.component_mirror.array_klass to plain ak, ak an arrayKlass.
   // See inline_native_Class_query for occurrences of these patterns.
   // Java Example:  x.getClass().isAssignableFrom(y)
@@ -2074,7 +2075,7 @@
   // This improves reflective code, often making the Class
   // mirror go completely dead.  (Current exception:  Class
   // mirrors may appear in debug info, but we could clean them out by
-  // introducing a new debug info operator for klassOop.java_mirror).
+  // introducing a new debug info operator for Klass*.java_mirror).
   if (toop->isa_instptr() && toop->klass() == phase->C->env()->Class_klass()
       && (offset == java_lang_Class::klass_offset_in_bytes() ||
           offset == java_lang_Class::array_klass_offset_in_bytes())) {
@@ -2223,11 +2224,12 @@
   case T_LONG:    return new (C, 4) StoreLNode(ctl, mem, adr, adr_type, val);
   case T_FLOAT:   return new (C, 4) StoreFNode(ctl, mem, adr, adr_type, val);
   case T_DOUBLE:  return new (C, 4) StoreDNode(ctl, mem, adr, adr_type, val);
+  case T_METADATA:
   case T_ADDRESS:
   case T_OBJECT:
 #ifdef _LP64
     if (adr->bottom_type()->is_ptr_to_narrowoop() ||
-        (UseCompressedOops && val->bottom_type()->isa_klassptr() &&
+        (UseCompressedKlassPointers && val->bottom_type()->isa_klassptr() &&
          adr->bottom_type()->isa_rawptr())) {
       val = gvn.transform(new (C, 2) EncodePNode(val, val->bottom_type()->make_narrowoop()));
       return new (C, 4) StoreNNode(ctl, mem, adr, adr_type, val);