Every pure number function got an integer clone, but clones are entered
only through the dispatchers of recursive members. A non-recursive pure
helper that no recursive member calls produced a dead internal function:
LLVM deleted it, after the frontend and optimizer had paid for it (the
self-hosted compiler emitted 11 such clones, e.g. isDigitCode and
hexValue).
Members are now the recursive members plus the members they reach, and a
module without recursive members gets no clones, so programs without
pure number recursion compile exactly as without clones.