https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111735
--- Comment #2 from GCC Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by David Faust <dfa...@gcc.gnu.org>: https://gcc.gnu.org/g:1502d724df85163b14b04e8f67072ca88eac411d commit r14-6716-g1502d724df85163b14b04e8f67072ca88eac411d Author: David Faust <david.fa...@oracle.com> Date: Tue Dec 12 13:55:59 2023 -0800 btf: change encoding of forward-declared enums [PR111735] The BTF specification does not formally define a representation for forward-declared enum types such as: enum Foo; Forward-declarations for struct and union types are represented by BTF_KIND_FWD, which has a 1-bit flag distinguishing the two. The de-facto standard format used by other tools like clang and pahole is to represent forward-declared enums as BTF_KIND_ENUM with vlen=0, i.e. as a regular enum type with no enumerators. This patch changes GCC to adopt that format, and makes a couple of minor cleanups in btf_asm_type (). gcc/ PR debug/111735 * btfout.cc (btf_fwd_to_enum_p): New. (btf_asm_type_ref): Special case references to enum forwards. (btf_asm_type): Special case enum forwards. Rename btf_size_type to btf_size, and change chained ifs switching on btf_kind into else ifs. gcc/testsuite/ PR debug/111735 * gcc.dg/debug/btf/btf-forward-2.c: New test.
