gh-106529: Generate uops for POP_JUMP_IF_[NOT_]NONE by gvanrossum · Pull Request #106796 · python/cpython

These aren't automatically translated because (ironically)
they are macros deferring to POP_JUMP_IF_{TRUE,FALSE},
which are not viable uops (being manually translated).

The hack is that we emit IS_NONE and then set opcode and
jump to the POP_JUMP_IF_{TRUE,FALSE} translation code.