Check in codegen test expectations.

test/codegen/expect/language/rewrite_assign_test.js

Index: test/codegen/expect/language/rewrite_assign_test.js
diff --git a/test/codegen/expect/language/rewrite_assign_test.js b/test/codegen/expect/language/rewrite_assign_test.js
new file mode 100644
index 0000000000000000000000000000000000000000..30f81bb2231ced640e950e0aecfa414c8c2151c3
--- /dev/null
+++ b/test/codegen/expect/language/rewrite_assign_test.js
@@ -0,0 +1,38 @@
+dart_library.library('language/rewrite_assign_test', null, /* Imports */[
+  'dart_sdk',
+  'expect'
+], function load__rewrite_assign_test(exports, dart_sdk, expect) {
+  'use strict';
+  const core = dart_sdk.core;
+  const dart = dart_sdk.dart;
+  const dartx = dart_sdk.dartx;
+  const expect$ = expect.expect;
+  const rewrite_assign_test = Object.create(null);
+  let dynamicAnddynamicTodynamic = () => (dynamicAnddynamicTodynamic = dart.constFn(dart.definiteFunctionType(dart.dynamic, [dart.dynamic, dart.dynamic])))();
+  let dynamicTodynamic = () => (dynamicTodynamic = dart.constFn(dart.definiteFunctionType(dart.dynamic, [dart.dynamic])))();
+  let VoidTodynamic = () => (VoidTodynamic = dart.constFn(dart.definiteFunctionType(dart.dynamic, [])))();
+  rewrite_assign_test.bar = function(x, y) {
+  };
+  dart.fn(rewrite_assign_test.bar, dynamicAnddynamicTodynamic());
+  rewrite_assign_test.foo = function(b) {
+    let x = null, y = null;
+    if (dart.test(b)) {
+      x = 1;
+      y = 2;
+    } else {
+      x = 2;
+      y = 1;
+    }
+    rewrite_assign_test.bar(x, y);
+    rewrite_assign_test.bar(x, y);
+    return x;
+  };
+  dart.fn(rewrite_assign_test.foo, dynamicTodynamic());
+  rewrite_assign_test.main = function() {
+    expect$.Expect.equals(1, rewrite_assign_test.foo(true));
+    expect$.Expect.equals(2, rewrite_assign_test.foo(false));
+  };
+  dart.fn(rewrite_assign_test.main, VoidTodynamic());
+  // Exports:
+  exports.rewrite_assign_test = rewrite_assign_test;
+});