c: Don't emit -Wunterminated-string-initialization warning for multi-dimensional nonstring array initializers [PR117178]

My/Kees' earlier patches adjusted -Wunterminated-string-initialization
warning so that it doesn't warn about initializers of nonstring decls
and that nonstring attribute is allowed on multi-dimensional arrays.
Unfortunately as this testcase shows, we still warn about initializers
of multi-dimensional array nonstring decls.

The problem is that in that case field passed to output_init_element
is actually INTEGER_CST, index into the array.
For RECORD_OR_UNION_TYPE_P (constructor_type) field is a FIELD_DECL
which we want to use, but otherwise (in arrays) IMHO we want to use
constructor_fields (which is the innermost FIELD_DECL whose part
is being initialized), or - if that is NULL - constructor_decl, the
whole decl being initialized with multi-dimensional array type.

2025-03-11  Jakub Jelinek  <jakub@redhat.com>

	PR c/117178
	* c-typeck.cc (output_init_element): Pass field to digest_init
	only for record/union types, otherwise pass constructor_fields
	if non-NULL and constructor_decl if constructor_fields is NULL.

	* gcc.dg/Wunterminated-string-initialization-2.c: New test.

0 files changed, 0 insertions, 0 deletions