--- a/hotspot/src/cpu/x86/vm/c1_LIRAssembler_x86.cpp	Wed Sep 10 12:31:26 2008 -0400
+++ b/hotspot/src/cpu/x86/vm/c1_LIRAssembler_x86.cpp	Thu Sep 11 09:02:02 2008 -0400
@@ -1129,8 +1129,8 @@
 #else
     __ pushl(frame_map()->address_for_slot(src ->double_stack_ix(), 0));
     // push and pop the part at src + wordSize, adding wordSize for the previous push
-    __ pushl(frame_map()->address_for_slot(src ->double_stack_ix(), wordSize));
-    __ popl (frame_map()->address_for_slot(dest->double_stack_ix(), wordSize));
+    __ pushl(frame_map()->address_for_slot(src ->double_stack_ix(), 2 * wordSize));
+    __ popl (frame_map()->address_for_slot(dest->double_stack_ix(), 2 * wordSize));
     __ popl (frame_map()->address_for_slot(dest->double_stack_ix(), 0));
 #endif // _LP64
 

--- a/hotspot/src/share/vm/opto/addnode.cpp	Wed Sep 10 12:31:26 2008 -0400
+++ b/hotspot/src/share/vm/opto/addnode.cpp	Thu Sep 11 09:02:02 2008 -0400
@@ -157,6 +157,7 @@
     Node *a12 = add1->in(2);
     const Type *t12 = phase->type( a12 );
     if( t12->singleton() && t12 != Type::TOP && (add1 != add1->in(1)) ) {
+      assert(add1->in(1) != this, "dead loop in AddNode::Ideal");
       add2 = add1->clone();
       add2->set_req(2, in(2));
       add2 = phase->transform(add2);
@@ -173,6 +174,7 @@
     Node *a22 = add2->in(2);
     const Type *t22 = phase->type( a22 );
     if( t22->singleton() && t22 != Type::TOP && (add2 != add2->in(1)) ) {
+      assert(add2->in(1) != this, "dead loop in AddNode::Ideal");
       Node *addx = add2->clone();
       addx->set_req(1, in(1));
       addx->set_req(2, add2->in(1));

--- a/hotspot/src/share/vm/opto/loopopts.cpp	Wed Sep 10 12:31:26 2008 -0400
+++ b/hotspot/src/share/vm/opto/loopopts.cpp	Thu Sep 11 09:02:02 2008 -0400
@@ -932,7 +932,7 @@
             // to fold a StoreP and an AddP together (as part of an
             // address expression) and the AddP and StoreP have
             // different controls.
-            if( !x->is_Load() ) _igvn._worklist.yank(x);
+            if( !x->is_Load() && !x->is_DecodeN() ) _igvn._worklist.yank(x);
           }
           _igvn.remove_dead_node(n);
         }