Check in codegen test expectations.

test/codegen/expect/language/number_identity2_test.js

Index: test/codegen/expect/language/number_identity2_test.js
diff --git a/test/codegen/expect/language/number_identity2_test.js b/test/codegen/expect/language/number_identity2_test.js
new file mode 100644
index 0000000000000000000000000000000000000000..d11da712978a39699ce31fd0cd2f8a83ea5c24fa
--- /dev/null
+++ b/test/codegen/expect/language/number_identity2_test.js
@@ -0,0 +1,41 @@
+dart_library.library('language/number_identity2_test', null, /* Imports */[
+  'dart_sdk',
+  'expect'
+], function load__number_identity2_test(exports, dart_sdk, expect) {
+  'use strict';
+  const core = dart_sdk.core;
+  const typed_data = dart_sdk.typed_data;
+  const dart = dart_sdk.dart;
+  const dartx = dart_sdk.dartx;
+  const expect$ = expect.expect;
+  const number_identity2_test = Object.create(null);
+  let intTodouble = () => (intTodouble = dart.constFn(dart.definiteFunctionType(core.double, [core.int])))();
+  let VoidTodynamic = () => (VoidTodynamic = dart.constFn(dart.definiteFunctionType(dart.dynamic, [])))();
+  number_identity2_test.uint64toDouble = function(i) {
+    let buffer = typed_data.Uint8List.new(8)[dartx.buffer];
+    let bdata = typed_data.ByteData.view(buffer);
+    bdata[dartx.setUint64](0, i);
+    return bdata[dartx.getFloat64](0);
+  };
+  dart.fn(number_identity2_test.uint64toDouble, intTodouble());
+  number_identity2_test.testNumberIdentity = function() {
+    let a = core.double.NAN;
+    let b = dart.notNull(a) + 0.0;
+    expect$.Expect.isTrue(core.identical(a, b));
+    a = number_identity2_test.uint64toDouble((1)[dartx['<<']](64) - 1);
+    b = number_identity2_test.uint64toDouble((1)[dartx['<<']](64) - 2);
+    expect$.Expect.isFalse(core.identical(a, b));
+    a = 0.0 / 0.0;
+    b = 1.0 / 0.0;
+    expect$.Expect.isFalse(core.identical(a, b));
+  };
+  dart.fn(number_identity2_test.testNumberIdentity, VoidTodynamic());
+  number_identity2_test.main = function() {
+    for (let i = 0; i < 20; i++) {
+      number_identity2_test.testNumberIdentity();
+    }
+  };
+  dart.fn(number_identity2_test.main, VoidTodynamic());
+  // Exports:
+  exports.number_identity2_test = number_identity2_test;
+});