cmmOffsetLit :: CmmLit -> Int -> CmmLit
cmmOffsetLit (CmmLabel l)      byte_off = cmmLabelOff l byte_off
cmmOffsetLit :: CmmLit -> Int -> CmmLit
cmmOffsetLit (CmmLabel l)      byte_off = cmmLabelOff l byte_off
cmmOffsetLit (CmmLabel l)      byte_off = cmmLabelOff l byte_off