chore(ssa refactor): Add entry point for acir gen pass (#1285)

* Add entry point for acir gen pass

* Fix typo

crates/noirc_evaluator/src/ssa_refactor.rs

@@ -7,6 +7,18 @@
 //! This module heavily borrows from Cranelift
 #![allow(dead_code)]
 
+use noirc_frontend::monomorphization::ast::Program;
+
+use self::acir_gen::Acir;
+
+mod acir_gen;
 mod ir;
 mod ssa_builder;
 pub mod ssa_gen;
+
+/// Optimize the given program by converting it into SSA
+/// form and performing optimizations there. When finished,
+/// convert the final SSA into ACIR and return it.
+pub fn optimize_into_acir(program: Program) -> Acir {
+    ssa_gen::generate_ssa(program).into_acir()
+}

crates/noirc_evaluator/src/ssa_refactor/acir_gen/mod.rs

@@ -0,0 +1,26 @@
+//! This file holds the pass to convert from Noir's SSA IR to ACIR.
+use super::ssa_gen::Ssa;
+
+/// Context struct for the acir generation pass.
+/// May be similar to the Evaluator struct in the current SSA IR.
+struct Context {}
+
+/// The output of the Acir-gen pass
+pub struct Acir {}
+
+impl Ssa {
+    pub(crate) fn into_acir(self) -> Acir {
+        let mut context = Context::new();
+        context.convert_ssa(self)
+    }
+}
+
+impl Context {
+    fn new() -> Self {
+        Self {}
+    }
+
+    fn convert_ssa(&mut self, _ssa: Ssa) -> Acir {
+        todo!()
+    }
+}