* config/xtensa/xtensa.c: Include "df.h".
(xtensa_builtin_saveregs): Use adjust_address instead of change_address.
(xtensa_va_start): Invoke make_tree with sizetype for
expand_builtin_saveregs and then convert the result to a pointer.
Use POINTER_PLUS_EXPR. Use size_int instead of build_int_cst.
(xtensa_gimplify_va_arg_expr): Use size_int instead of build_int_cst.
Subtract argument size from index value as integers and then use
POINTER_PLUS_EXPR to add the result to the array address.
From-SVN: r125854
e70312d499