--- a/hotspot/src/share/vm/jvmci/jvmciEnv.hpp	Wed Nov 11 23:47:41 2015 +0000
+++ b/hotspot/src/share/vm/jvmci/jvmciEnv.hpp	Fri Nov 13 13:31:48 2015 +0100
@@ -78,7 +78,7 @@
   // The CI treats a klass as loaded if it is consistently defined in
   // another loader, even if it hasn't yet been loaded in all loaders
   // that could potentially see it via delegation.
-  static KlassHandle get_klass_by_name(KlassHandle& accessing_klass,
+  static KlassHandle get_klass_by_name(KlassHandle accessing_klass,
                              Symbol* klass_name,
                              bool require_local);
 
@@ -86,12 +86,12 @@
   static KlassHandle   get_klass_by_index(const constantPoolHandle& cpool,
                                 int klass_index,
                                 bool& is_accessible,
-                                KlassHandle& loading_klass);
-  static void   get_field_by_index(instanceKlassHandle& loading_klass, fieldDescriptor& fd,
+                                KlassHandle loading_klass);
+  static void   get_field_by_index(instanceKlassHandle loading_klass, fieldDescriptor& fd,
                                 int field_index);
   static methodHandle  get_method_by_index(const constantPoolHandle& cpool,
                                  int method_index, Bytecodes::Code bc,
-                                 instanceKlassHandle& loading_klass);
+                                 instanceKlassHandle loading_klass);
 
   JVMCIEnv(CompileTask* task, int system_dictionary_modification_counter);
 
@@ -112,17 +112,17 @@
   static KlassHandle   get_klass_by_index_impl(const constantPoolHandle& cpool,
                                      int klass_index,
                                      bool& is_accessible,
-                                     KlassHandle& loading_klass);
-  static void   get_field_by_index_impl(instanceKlassHandle& loading_klass, fieldDescriptor& fd,
+                                     KlassHandle loading_klass);
+  static void   get_field_by_index_impl(instanceKlassHandle loading_klass, fieldDescriptor& fd,
                                      int field_index);
   static methodHandle  get_method_by_index_impl(const constantPoolHandle& cpool,
                                       int method_index, Bytecodes::Code bc,
-                                      instanceKlassHandle& loading_klass);
+                                      instanceKlassHandle loading_klass);
 
   // Helper methods
   static bool       check_klass_accessibility(KlassHandle accessing_klass, KlassHandle resolved_klass);
-  static methodHandle  lookup_method(instanceKlassHandle&  accessor,
-                           instanceKlassHandle&  holder,
+  static methodHandle  lookup_method(instanceKlassHandle  accessor,
+                           instanceKlassHandle  holder,
                            Symbol*         name,
                            Symbol*         sig,
                            Bytecodes::Code bc);
@@ -142,7 +142,7 @@
 
   // Register the result of a compilation.
   static JVMCIEnv::CodeInstallResult register_method(
-                       methodHandle&             target,
+                       const methodHandle&       target,
                        nmethod*&                 nm,
                        int                       entry_bci,
                        CodeOffsets*              offsets,
@@ -166,7 +166,7 @@
   // InstanceKlass*.  This is needed since the holder of a method in
   // the bytecodes could be an array type.  Basically this converts
   // array types into java/lang/Object and other types stay as they are.
-  static instanceKlassHandle get_instance_klass_for_declared_method_holder(KlassHandle& klass);
+  static instanceKlassHandle get_instance_klass_for_declared_method_holder(KlassHandle klass);
 };
 
 #endif // SHARE_VM_JVMCI_JVMCIENV_HPP