--- a/hotspot/src/share/vm/ci/ciMethodData.hpp	Tue Mar 11 11:25:13 2008 -0700
+++ b/hotspot/src/share/vm/ci/ciMethodData.hpp	Tue Mar 11 19:00:38 2008 -0700
@@ -30,6 +30,7 @@
 class ciBranchData;
 class ciArrayData;
 class ciMultiBranchData;
+class ciArgInfoData;
 
 typedef ProfileData ciProfileData;
 
@@ -121,6 +122,11 @@
   ciMultiBranchData(DataLayout* layout) : MultiBranchData(layout) {};
 };
 
+class ciArgInfoData : public ArgInfoData {
+public:
+  ciArgInfoData(DataLayout* layout) : ArgInfoData(layout) {};
+};
+
 // ciMethodData
 //
 // This class represents a methodDataOop in the HotSpot virtual
@@ -163,9 +169,9 @@
   ciMethodData();
 
   // Accessors
-  int data_size() { return _data_size; }
-  int extra_data_size() { return _extra_data_size; }
-  intptr_t * data() { return _data; }
+  int data_size() const { return _data_size; }
+  int extra_data_size() const { return _extra_data_size; }
+  intptr_t * data() const { return _data; }
 
   methodDataOop get_methodDataOop() const {
     if (handle() == NULL) return NULL;
@@ -178,7 +184,7 @@
 
   void print_impl(outputStream* st);
 
-  DataLayout* data_layout_at(int data_index) {
+  DataLayout* data_layout_at(int data_index) const {
     assert(data_index % sizeof(intptr_t) == 0, "unaligned");
     return (DataLayout*) (((address)_data) + data_index);
   }
@@ -207,6 +213,8 @@
   // What is the index of the first data entry?
   int first_di() { return 0; }
 
+  ciArgInfoData *arg_info() const;
+
 public:
   bool is_method_data()  { return true; }
   bool is_empty() { return _state == empty_state; }
@@ -270,10 +278,12 @@
   void set_arg_local(int i);
   void set_arg_stack(int i);
   void set_arg_returned(int i);
+  void set_arg_modified(int arg, uint val);
 
   bool is_arg_local(int i) const;
   bool is_arg_stack(int i) const;
   bool is_arg_returned(int i) const;
+  uint arg_modified(int arg) const;
 
   // Code generation helper
   ByteSize offset_of_slot(ciProfileData* data, ByteSize slot_offset_in_data);