added USES_PENDING

ir/be/beuses.h

@@ -20,12 +20,18 @@ typedef struct _be_next_use_t {
 } be_next_use_t;
 
 #define USES_INFINITY                 10000000
+#define USES_PENDING                   9999999
 
 static INLINE int USES_IS_INFINITE(unsigned time)
 {
 	return time >= USES_INFINITY;
 }
 
+static INLINE int USES_IS_PENDING(unsigned time)
+{
+	return time == USES_PENDING;
+}
+
 typedef struct _be_uses_t be_uses_t;
 
 be_next_use_t be_get_next_use(be_uses_t *uses, ir_node *from,