cmmOffsetLit (CmmInt m rep)    byte_off = CmmInt (m + fromIntegral byte_off) rep
cmmOffsetLit (CmmInt m rep)    byte_off = CmmInt (m + fromIntegral byte_off) rep
cmmOffsetLit (CmmInt m rep)    byte_off = CmmInt (m + fromIntegral byte_off) rep