[Bug go/108426] [13 regression] SEGV in contains_struct_check

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108426

--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
Meh, similar to build_common_tree_nodes we should have a function to build
those common builtin decls in the middle-end.  They are C ABI after all and
it's fine to use standard C named types there.