Use tcg_out_ld_helper_args, tcg_out_ld_helper_ret,
and tcg_out_st_helper_args. This allows our local
tcg_out_arg_* infrastructure to be removed.
We are no longer filling the call or return branch
delay slots, nor are we tail-calling for the store,
but this seems a small price to pay.
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
f07aaf4856