fix debug

Author: majocha

src/Compiler/Optimize/Optimizer.fs

@@ -9,18 +9,24 @@ open Internal.Utilities.Collections
 open Internal.Utilities.Library
 open Internal.Utilities.Library.Extras
 open FSharp.Compiler
+open FSharp.Compiler.AbstractIL.Diagnostics
 open FSharp.Compiler.AbstractIL.IL
 open FSharp.Compiler.AttributeChecking
 open FSharp.Compiler.CompilerGlobalState
 open FSharp.Compiler.DiagnosticsLogger
 open FSharp.Compiler.Text.Range
 open FSharp.Compiler.Syntax.PrettyNaming
 open FSharp.Compiler.Syntax
+open FSharp.Compiler.SyntaxTreeOps
 open FSharp.Compiler.TcGlobals
 open FSharp.Compiler.Text
+open FSharp.Compiler.Text.Layout
+open FSharp.Compiler.Text.LayoutRender
+open FSharp.Compiler.Text.TaggedText
 open FSharp.Compiler.TypedTree 
 open FSharp.Compiler.TypedTreeBasics
 open FSharp.Compiler.TypedTreeOps
+open FSharp.Compiler.TypedTreeOps.DebugPrint
 open FSharp.Compiler.TypedTreePickle
 open FSharp.Compiler.TypeHierarchy
 open FSharp.Compiler.TypeRelations