feat: migrate to new pass manager

src/Lean/Compiler/LCNF/Main.lean

@@ -5,6 +5,7 @@ Authors: Leonardo de Moura
 -/
 import Lean.Compiler.Options
 import Lean.Compiler.LCNF.PassManager
+import Lean.Compiler.LCNF.Passes
 import Lean.Compiler.LCNF.PrettyPrinter
 import Lean.Compiler.LCNF.ToDecl
 import Lean.Compiler.LCNF.Check

src/Lean/Compiler/LCNF/Passes.lean

@@ -0,0 +1,20 @@
+/-
+Copyright (c) 2022 Henrik Böving. All rights reserved.
+Released under Apache 2.0 license as described in the file LICENSE.
+Authors: Henrik Böving
+-/
+import Lean.Compiler.LCNF.PassManager
+import Lean.Compiler.LCNF.PullLetDecls
+import Lean.Compiler.LCNF.CSE
+
+namespace Lean.Compiler.LCNF
+
+@[cpass]
+def pullInstancesInstaller : PassInstaller :=
+  .installAfter `init (.mkPerDeclaration `pullInstances Decl.pullInstances)
+
+@[cpass]
+def cseInstaller : PassInstaller :=
+  .installAfter `pullInstances (.mkPerDeclaration `cse Decl.cse)
+
+end Lean.Compiler.LCNF