reduce memory footprint of handles a bit

src/datawizard/coherency.h

@@ -48,14 +48,14 @@ struct _starpu_data_replicate
 	/* describe the actual data layout, as manipulated by data interfaces in *_interface.c */
 	void *data_interface;
 
-	unsigned memory_node;
-
-	/* describes the state of the local data in term of coherency */
-	enum _starpu_cache_state	state;
-
 	/* How many requests or tasks are currently working with this replicate */
 	int refcnt;
 
+	char memory_node;
+
+	/* describes the state of the local data in term of coherency */
+	enum _starpu_cache_state	state: 2;
+
 	/* A buffer that is used for SCRATCH or reduction cannnot be used with
 	 * filters. */
 	unsigned relaxed_coherency:2;
@@ -72,9 +72,6 @@ struct _starpu_data_replicate
 	 * */
 	unsigned automatically_allocated:1;
 
-        /* Pointer to memchunk for LRU strategy */
-	struct _starpu_mem_chunk * mc;
-
 	/* To help the scheduling policies to make some decision, we
 	   may keep a track of the tasks that are likely to request
 	   this data on the current node.
@@ -84,6 +81,9 @@ struct _starpu_data_replicate
 	 */
 	uint32_t requested;
 	struct _starpu_data_request *request[STARPU_MAXNODES];
+
+        /* Pointer to memchunk for LRU strategy */
+	struct _starpu_mem_chunk * mc;
 };
 
 struct _starpu_data_requester_list;