Unnecessary temp variables

[我每天睡不着]

After haxe 3.2.1, I feeling the compiler has generated too many temporary variables. especially when the code contains `untyped` or `unsafe cast`

* `untyped`: some special functions for each platform, e.g:  the JS platform have `__instanceof__`, `__strict_eq__` and ......

* `unsafe cast`: when you use the `abstract class` such cast seems common..

so Is there a simple way to switch back to the old(3.2.1) optimizer when I did not add `-D analyzer-optimize`?

(*sorry for my terrible english*)