* calls.c (emit_call_1): New arg rounded_stack_size; update callers.
        Update pending_stack_adjust based on this value.
        (compute_argument_block_size): Include pending_stack_adjust in
        PREFERRED_STACK_BOUNDARY alignment.
        * function.c (assign_parms): Don't round to PREFERRED_STACK_BOUNDARY.

From-SVN: r26623