https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113291
--- Comment #5 from Jan Hubicka <hubicka at gcc dot gnu.org> --- There is a cap in want_inline_self_recursive_call_p which gives up on inlining after reaching max recursive inlining depth of 8. Problem is that the tree here is too wide. After early inlining f0 contains 4 calls to f1 and 3 calls to f0. Similarly for f0, so we have something like (9+3*9)^8 as a cap on number of inlines that takes a while to converge. One may want to limit number of copies of function A within function B rather than depth, but that number can be large even for sane code. I am making patch to make inliner to ignore always_inline on all self-recrusive inline decisions.
