Check in codegen test expectations.

test/codegen/expect/language/compile_time_constant5_test.js

+dart_library.library('language/compile_time_constant5_test', null, /* Imports */[
+  'dart_sdk',
+  'expect'
+], function load__compile_time_constant5_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 compile_time_constant5_test = Object.create(null);
+  let VoidTodynamic = () => (VoidTodynamic = dart.constFn(dart.definiteFunctionType(dart.dynamic, [])))();
+  compile_time_constant5_test.x = true;
+  compile_time_constant5_test.g1 = !true;
+  compile_time_constant5_test.g2 = !compile_time_constant5_test.g1;
+  compile_time_constant5_test.main = function() {
+    expect$.Expect.equals(false, compile_time_constant5_test.g1);
+    expect$.Expect.equals(true, compile_time_constant5_test.g2);
+  };
+  dart.fn(compile_time_constant5_test.main, VoidTodynamic());
+  // Exports:
+  exports.compile_time_constant5_test = compile_time_constant5_test;
+});