https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83324
--- Comment #11 from David Edelsohn <dje at gcc dot gnu.org> --- GIMPLE supports must_tail, but it is not exposed at the sources level / attributes in GCC. CPython is not adding the LLVM JIT at runtime. The proposal is to utilize LLVM at build time to generate code templates that can be copied into the CPython binary and patched with relocations. CALL_EXPR_MUST_TAIL_CALL and libgccjit are not sufficient for the CPython plan. The plan does not propose connecting CPython to an existing JIT in LLVM (or GCC).
