PR middle-end/89957 - ICE calling strnlen with an int128_t bound in a known range

PR middle-end/89957 - ICE calling strnlen with an int128_t bound in a known range

PR middle-end/89957 - ICE calling strnlen with an int128_t bound in a known range
PR middle-end/89911 - [9 Regression] ICE in get_attr_nonstring_decl

gcc/ChangeLog:

	PR middle-end/89957
	PR middle-end/89911
	* builtins.c (expand_builtin_strnlen): Make sure wi::ltu_p operands
	have the same precision since the function crashes otherwise.
	* calls.c (maybe_warn_nonstring_arg): Avoid assuming strnlen() call
	has non-zero arguments.

gcc/testsuite/ChangeLog:

	PR middle-end/89957
	PR middle-end/89911
	* gcc.dg/Wstringop-overflow-13.c: New test.

From-SVN: r270154