[meta] Add type inference, transforms and AST helpers for legalization;

cranelift/codegen/meta/src/cdsl/mod.rs

@@ -3,6 +3,8 @@
 //! This module defines the classes that are used to define Cranelift
 //! instructions and other entities.
 
+#[macro_use]
+pub mod ast;
 pub mod formats;
 pub mod inst;
 pub mod isa;
@@ -12,6 +14,7 @@ pub mod settings;
 pub mod type_inference;
 pub mod types;
 pub mod typevar;
+pub mod xform;
 
 /// A macro that converts boolean settings into predicates to look more natural.
 #[macro_export]