Move more code to new gimple-ssa-warn-access pass.

Move more code to new gimple-ssa-warn-access pass.

gcc/ChangeLog:

	* builtins.c (expand_builtin_memchr): Move to gimple-ssa-warn-access.cc.
	(expand_builtin_strcat): Same.
	(expand_builtin_stpncpy): Same.
	(expand_builtin_strncat): Same.
	(check_read_access): Same.
	(check_memop_access): Same.
	(expand_builtin_strlen): Move checks to gimple-ssa-warn-access.cc.
	(expand_builtin_strnlen): Same.
	(expand_builtin_memcpy): Same.
	(expand_builtin_memmove): Same.
	(expand_builtin_mempcpy): Same.
	(expand_builtin_strcpy): Same.
	(expand_builtin_strcpy_args): Same.
	(expand_builtin_stpcpy_1): Same.
	(expand_builtin_strncpy): Same.
	(expand_builtin_memset): Same.
	(expand_builtin_bzero): Same.
	(expand_builtin_strcmp): Same.
	(expand_builtin_strncmp): Same.
	(expand_builtin): Remove handlers.
	(fold_builtin_strlen): Add a comment.
	* builtins.h (check_access): Move to gimple-ssa-warn-access.cc.
	* calls.c (maybe_warn_nonstring_arg): Same.
	* diagnostic-spec.c (nowarn_spec_t::nowarn_spec_t): Add warning option.
	* gimple-fold.c (gimple_fold_builtin_strcpy): Pass argument to callee.
	(gimple_fold_builtin_stpcpy): Same.
	* gimple-ssa-warn-access.cc (has_location): New function.
	(get_location): Same.
	(get_callee_fndecl): Same.
	(call_nargs): Same.
	(call_arg): Same.
	(warn_string_no_nul): Define.
	(unterminated_array): Same.
	(check_nul_terminated_array): Same.
	(maybe_warn_nonstring_arg): Same.
	(maybe_warn_for_bound): Same.
	(warn_for_access): Same.
	(check_access): Same.
	(check_memop_access): Same.
	(check_read_access): Same.
	(warn_dealloc_offset): Use helper functions.
	(maybe_emit_free_warning): Same.
	(class pass_waccess): Add members.
	(check_strcat): New function.
	(check_strncat): New function.
	(check_stxcpy): New function.
	(check_stxncpy): New function.
	(check_strncmp): New function.
	(pass_waccess::check_builtin): New function.
	(pass_waccess::check): Call it.
	* gimple-ssa-warn-access.h (warn_string_no_nul): Move here from
	builtins.h.
	(maybe_warn_for_bound): Same.
	(check_access): Same.
	(check_memop_access): Same.
	(check_read_access): Same.
	* pointer-query.h (struct access_data): Define a ctor overload.

gcc/testsuite/ChangeLog:

	* c-c++-common/Wsizeof-pointer-memaccess1.c: Also disable
	-Wstringop-overread.
	* c-c++-common/attr-nonstring-3.c: Adjust pattern of expected message.
	* gcc.dg/Warray-bounds-39.c: Add an xfail due to a known bug.
	* gcc.dg/Wstring-compare-3.c: Also disable -Wstringop-overread.
	* gcc.dg/attr-nonstring-2.c: Adjust pattern of expected message.
	* gcc.dg/attr-nonstring-4.c: Same.
	* gcc.dg/Wstringop-overread-6.c: New test.
	* gcc.dg/sso-14.c: Fix typos to avoid buffer overflow.