Teach magicIdRegMaybe about R9 and R10.
#ifdef REG_R8
magicIdRegMaybe (VanillaReg _ ILIT(8)) = Just (FixedReg ILIT(REG_R8))
#endif
+#ifdef REG_R9
+magicIdRegMaybe (VanillaReg _ ILIT(9)) = Just (FixedReg ILIT(REG_R9))
+#endif
+#ifdef REG_R10
+magicIdRegMaybe (VanillaReg _ ILIT(10)) = Just (FixedReg ILIT(REG_R10))
+#endif
#ifdef REG_F1
magicIdRegMaybe (FloatReg ILIT(1)) = Just (FixedReg ILIT(REG_F1))
#endif