Check in codegen test expectations.

test/codegen/expect/language/value_range2_test.js

Index: test/codegen/expect/language/value_range2_test.js
diff --git a/test/codegen/expect/language/value_range2_test.js b/test/codegen/expect/language/value_range2_test.js
new file mode 100644
index 0000000000000000000000000000000000000000..b2d025d2c808d9cf7aca70a7fafa2925a3bea705
--- /dev/null
+++ b/test/codegen/expect/language/value_range2_test.js
@@ -0,0 +1,37 @@
+dart_library.library('language/value_range2_test', null, /* Imports */[
+  'dart_sdk',
+  'expect'
+], function load__value_range2_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 value_range2_test = Object.create(null);
+  let intToint = () => (intToint = dart.constFn(dart.definiteFunctionType(core.int, [core.int])))();
+  let VoidTodynamic = () => (VoidTodynamic = dart.constFn(dart.definiteFunctionType(dart.dynamic, [])))();
+  let VoidTovoid = () => (VoidTovoid = dart.constFn(dart.definiteFunctionType(dart.void, [])))();
+  let dynamicTobool = () => (dynamicTobool = dart.constFn(dart.definiteFunctionType(core.bool, [dart.dynamic])))();
+  value_range2_test.inscrutable = function(x) {
+    return x == 0 ? 0 : (dart.notNull(x) | dart.notNull(value_range2_test.inscrutable((dart.notNull(x) & dart.notNull(x) - 1) >>> 0))) >>> 0;
+  };
+  dart.fn(value_range2_test.inscrutable, intToint());
+  let const$;
+  value_range2_test.foo = function() {
+    let x = 0;
+    if (value_range2_test.inscrutable(0) == 0) x = -2;
+    let y = 2;
+    if (value_range2_test.inscrutable(0) == 0) y = 4;
+    let i = y - x;
+    i = i - 4;
+    let a = const$ || (const$ = dart.constList([1], core.int));
+    return a[dartx.get](i);
+  };
+  dart.fn(value_range2_test.foo, VoidTodynamic());
+  value_range2_test.main = function() {
+    expect$.Expect.throws(dart.fn(() => value_range2_test.foo(), VoidTovoid()), dart.fn(e => core.RangeError.is(e), dynamicTobool()));
+  };
+  dart.fn(value_range2_test.main, VoidTodynamic());
+  // Exports:
+  exports.value_range2_test = value_range2_test;
+});