shouldInlinePrimOp _ CopyMutableArrayOp
    [src, src_off, dst, dst_off, (CmmLit (CmmInt n _))] =
        Just $ \ [] -> doCopyMutableArrayOp src src_off dst dst_off (fromInteger n)
shouldInlinePrimOp _ CopyMutableArrayOp
    [src, src_off, dst, dst_off, (CmmLit (CmmInt n _))] =
        Just $ \ [] -> doCopyMutableArrayOp src src_off dst dst_off (fromInteger n)
shouldInlinePrimOp _ CopyMutableArrayOp
    [src, src_off, dst, dst_off, (CmmLit (CmmInt n _))] =
        Just $ \ [] -> doCopyMutableArrayOp src src_off dst dst_off (fromInteger n)