debug

move dead node elim to front of after_cconv

clean code

add special handle for switch_layer and Fix ExistClosure

split define of value getter

visit from root graph output

add renormalize after dead node elim

Revert "add renormalize after dead node elim"

This reverts commit cb402e7000.

add eliminate to after cconv

fix bug of monad no abstract

code review fix

add change flag of analyzer