7047961: JSR 292 MethodHandleWalk swap args doesn't handle T_LONG and T_DOUBLE properly Reviewed-by: kvn, jrose

7047491: C1: registers saved incorrectly when calling checkcast_arraycopy stub Summary: Save and restore the argument registers around the call to checkcast_arraycopy Reviewed-by: never, roland

7048332: Cadd_cmpLTMask doesn't handle 64-bit tmp register properly Summary: Use ins_encode %{ %} form to encode cadd_cmpLTMask() instruction and remove unused code. Reviewed-by: never