https://gcc.gnu.org/bugzilla/show_bug.cgi?id=117178
--- Comment #30 from GCC Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Jakub Jelinek <ja...@gcc.gnu.org>: https://gcc.gnu.org/g:ab714e60870d1bb98039652b760918b5e680ac10 commit r15-7901-gab714e60870d1bb98039652b760918b5e680ac10 Author: Jakub Jelinek <ja...@redhat.com> Date: Sat Mar 8 00:50:13 2025 +0100 c-family, tree: Allow nonstring attribute on multidimensional arrays [PR117178] As requested in the PR117178 thread, the following patch allows nonstring attribute also on multi-dimensional arrays (with cv char/signed char/unsigned char as innermost element type) and pointers to such multi-dimensional arrays or pointers to single-dimensional cv char/signed char/unsigned char arrays. Given that (unfortunately) nonstring is a decl attribute rather than type attribute, I think restricting it to single-dimensional arrays makes no sense, even multi-dimensional ones can be used for storage of non-nul terminated strings. I really don't know what the kernel plans are, whether they'll go with -Wno-unterminated-string-initialization added in Makefiles, or whether the plan is to use nonstring attributes to quiet the warning. In the latter case, some of the nonstring attributes will need to be conditional on gcc version, because gcc before this patch will reject it on multidimensional arrays. 2025-03-08 Jakub Jelinek <ja...@redhat.com> PR c/117178 gcc/ * tree.cc (get_attr_nonstring_decl): Look through all ARRAY_REFs, not just one and handle COMPONENT_REF and MEM_REF after skipping those rather than only when there wasn't ARRAY_REF. Formatting fix. gcc/c-family/ * c-attribs.cc (handle_nonstring_attribute): Allow the attribute also on multi-dimensional arrays with char/signed char/unsigned char element type or pointers to such single and multi-dimensional arrays. gcc/testsuite/ * c-c++-common/attr-nonstring-7.c: Remove one xfail. * c-c++-common/attr-nonstring-9.c: New test. * c-c++-common/attr-nonstring-10.c: New test. * c-c++-common/attr-nonstring-11.c: New test. * c-c++-common/attr-nonstring-12.c: New test. * c-c++-common/attr-nonstring-13.c: New test. * c-c++-common/attr-nonstring-14.c: New test. * c-c++-common/attr-nonstring-15.c: New test. * c-c++-common/attr-nonstring-16.c: New test.
