middle-end/100727 - fix call expansion with WITH_SIZE_EXPR arg

middle-end/100727 - fix call expansion with WITH_SIZE_EXPR arg

call expansion used the result of get_base_address to switch between
ABIs - with get_base_address now never returning NULL we have to
re-instantiate the check in a more explicit way.  This also adjusts
mark_addressable to skip WITH_SIZE_EXPRs, consistent with how
build_fold_addr_expr handles it.

2021-05-25  Richard Biener  <rguenther@suse.de>

	PR middle-end/100727
	* calls.c (initialize_argument_information): Explicitely test
	for WITH_SIZE_EXPR.
	* gimple-expr.c (mark_addressable): Skip outer WITH_SIZE_EXPR.