cps-ir: Implement boolean conversion in and use it to implement '&&', '||', and '?:'.

tests/compiler/dart2js/js_backend_cps_ir_test.dart

 // Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 // VMOptions=-DUSE_CPS_IR=true
 
 // Test that the CPS IR code generator is able to compile the provided
 // example programs.
 
 import 'package:async_helper/async_helper.dart';
 import 'package:expect/expect.dart';
@@ skipping 50 matching lines @@
   """,
   """function() {
   return V.foo();
 }"""),
   const TestEntry("main() {}"),
   const TestEntry("main() { return 42; }"),
   const TestEntry("main() { return; }", """
 function() {
   return null;
 }"""),
+  const TestEntry("main() { return true ? 42 : 'foo'; }"),
+  const TestEntry("""
+foo() => foo;
+main() {
+  print(foo() ? "hello world" : "bad bad");
+}""",
+"""function() {
+  P.print(P.identical(V.foo(), true) ? "hello world" : "bad bad");
+  return null;
+}"""),
+  const TestEntry("""
+get foo => foo;
+main() {
+  print(foo ? "hello world" : "bad bad");
+}""",
+"""function() {
+  P.print(P.identical(V.foo(), true) ? "hello world" : "bad bad");
+  return null;
+}"""),
+  const TestEntry("""
+get foo => foo;
+main() { print(foo && foo); }""",
+"""function() {
+  P.print(P.identical(V.foo(), true) && P.identical(V.foo(), true));
+  return null;
+}"""),
+  const TestEntry("""
+get foo => foo;
+main() { print(foo || foo); }""",
+"""function() {
+  P.print(P.identical(V.foo(), true) || P.identical(V.foo(), true));
+  return null;
+}"""),
 ];
 
 String formatTest(Map test) {
   return test[TEST_MAIN_FILE];
 }
 
 String getCodeForMain(Compiler compiler) {
   Element mainFunction = compiler.mainFunction;
   js.Node ast = compiler.enqueuer.codegen.generatedCode[mainFunction];
   return js.prettyPrint(ast, compiler).getText();
 }
 
 main() {
   Expect.isTrue(const bool.fromEnvironment("USE_CPS_IR"));
 
   for (TestEntry test in tests) {
     Map files = {TEST_MAIN_FILE: test.source};
     asyncTest(() {
       Compiler compiler = compilerFor(files);
       Uri uri = Uri.parse('memory:$TEST_MAIN_FILE');
       return compiler.run(uri).then((_) {
         Expect.isNotNull(compiler.assembledCode);
         String expectation = test.expectation;
         if (expectation != null) {
-          Expect.equals(test.expectation, getCodeForMain(compiler));
+          String expected = test.expectation;
+          String found = getCodeForMain(compiler);
+          if (expected != found) {
+            Expect.fail('Expected:\n$expected\nbut found\n$found');
+          }
         }
       }).catchError((e) {
         print(e);
         Expect.fail('The following test failed to compile:\n'
                     '${formatTest(files)}');
       });
     });
   }
 }