flakes and fixed some tests

.gitignore

@@ -0,0 +1 @@
+result

asm/amd64/amd64_test.go

@@ -147,7 +147,7 @@ var basicTest string
 
 func TestCodegen(t *testing.T) {
 	program := &ttir.Program{
-		Functions: []ttir.Function{
+		Functions: []*ttir.Function{
 			{
 				Name:           "main",
 				HasReturnValue: true,
@@ -193,7 +193,7 @@ var binaryTest string
 
 func TestBinary(t *testing.T) {
 	program := &ttir.Program{
-		Functions: []ttir.Function{
+		Functions: []*ttir.Function{
 			{
 				Name: "main",
 				Instructions: []ttir.Instruction{
@@ -222,7 +222,7 @@ var equalityTest string
 // There was once a bug with how the cmp instructions were generated, this check should fail if it happens again
 func TestEqualityOperators(t *testing.T) {
 	program := ttir.Program{
-		Functions: []ttir.Function{
+		Functions: []*ttir.Function{
 			{
 				Name:           "main",
 				HasReturnValue: false,

flake.lock

@@ -0,0 +1,26 @@
+{
+  "nodes": {
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1739214665,
+        "narHash": "sha256-26L8VAu3/1YRxS8MHgBOyOM8xALdo6N0I04PgorE7UM=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "64e75cd44acf21c7933d61d7721e812eac1b5a0a",
+        "type": "github"
+      },
+      "original": {
+        "id": "nixpkgs",
+        "ref": "nixos-unstable",
+        "type": "indirect"
+      }
+    },
+    "root": {
+      "inputs": {
+        "nixpkgs": "nixpkgs"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

flake.nix

@@ -0,0 +1,71 @@
+{
+  description = "A simple Go package";
+
+  # Nixpkgs / NixOS version to use.
+  inputs.nixpkgs.url = "nixpkgs/nixos-unstable";
+
+  outputs = { self, nixpkgs }:
+    let
+
+      # to work with older version of flakes
+      lastModifiedDate = self.lastModifiedDate or self.lastModified or "19700101";
+
+      # Generate a user-friendly version number.
+      version = builtins.substring 0 8 lastModifiedDate;
+
+      # System types to support.
+      supportedSystems = [ "x86_64-linux" "x86_64-darwin" "aarch64-linux" "aarch64-darwin" ];
+
+      # Helper function to generate an attrset '{ x86_64-linux = f "x86_64-linux"; ... }'.
+      forAllSystems = nixpkgs.lib.genAttrs supportedSystems;
+
+      # Nixpkgs instantiated for supported system types.
+      nixpkgsFor = forAllSystems (system: import nixpkgs { inherit system; });
+
+    in
+    {
+
+      # Provide some binary packages for selected system types.
+      packages = forAllSystems (system:
+        let
+          pkgs = nixpkgsFor.${system};
+        in
+        {
+          tt = pkgs.buildGoModule {
+            pname = "tt";
+            inherit version;
+            # In 'nix develop', we don't need a copy of the source tree
+            # in the Nix store.
+            src = ./.;
+
+            # This hash locks the dependencies of this package. It is
+            # necessary because of how Go requires network access to resolve
+            # VCS.  See https://www.tweag.io/blog/2021-03-04-gomod2nix/ for
+            # details. Normally one can build with a fake hash and rely on native Go
+            # mechanisms to tell you what the hash should be or determine what
+            # it should be "out-of-band" with other tooling (eg. gomod2nix).
+            # To begin with it is recommended to set this, but one must
+            # remember to bump this hash when your dependencies change.
+            # vendorHash = pkgs.lib.fakeHash;
+
+            vendorHash = "sha256-cpjMZr+kP+XyXRxK4YI/lGHl97IROFVVz8DrID0vi6E=";
+          };
+        });
+
+      # Add dependencies that are only needed for development
+      devShells = forAllSystems (system:
+        let
+          pkgs = nixpkgsFor.${system};
+        in
+        {
+          default = pkgs.mkShell {
+            buildInputs = with pkgs; [ go gopls gotools go-tools ];
+          };
+        });
+
+      # The default package for 'nix build'. This makes sense if the
+      # flake provides only one package or there is a clear "main"
+      # package.
+      defaultPackage = forAllSystems (system: self.packages.${system}.tt);
+    };
+}

ttir/ttir_test.go

@@ -58,7 +58,7 @@ func expectProgram(t *testing.T, expected *Program, actual *Program) {
 	}
 }
 
-func expectFunction(t *testing.T, expected Function, actual Function) {
+func expectFunction(t *testing.T, expected *Function, actual *Function) {
 	t.Helper()
 
 	if expected.Name != actual.Name {
@@ -133,7 +133,7 @@ func TestBasicFunction(t *testing.T) {
 	runTTIREmitterTest(t, ttirEmitterTest{
 		input: "fn main() = 0;",
 		expected: Program{
-			Functions: []Function{
+			Functions: []*Function{
 				{
 					Name: "main",
 					Instructions: []Instruction{
@@ -151,7 +151,7 @@ func TestBinaryExpression(t *testing.T) {
 	runTTIREmitterTest(t, ttirEmitterTest{
 		input: "fn main() = 3 + 3 + 3;",
 		expected: Program{
-			Functions: []Function{
+			Functions: []*Function{
 				{Name: "main", Instructions: []Instruction{
 					&Binary{Operator: ast.Add, Lhs: &Constant{Value: 3}, Rhs: &Constant{Value: 3}, Dst: &Var{Value: "temp.1"}},
 					&Binary{Operator: ast.Add, Lhs: &Var{Value: "temp.1"}, Rhs: &Constant{Value: 3}, Dst: &Var{Value: "temp.2"}},