Optimize identical based on types.

tests/compiler/dart2js/js_backend_cps_ir_operators_test.dart

Index: tests/compiler/dart2js/js_backend_cps_ir_operators_test.dart
diff --git a/tests/compiler/dart2js/js_backend_cps_ir_operators_test.dart b/tests/compiler/dart2js/js_backend_cps_ir_operators_test.dart
index bd4eec4e7c9bdad3bbf5ee302c33735b4dbf3660..486bcc76989bff977a7c6f41bcccfe5137cf19d1 100644
--- a/tests/compiler/dart2js/js_backend_cps_ir_operators_test.dart
+++ b/tests/compiler/dart2js/js_backend_cps_ir_operators_test.dart
@@ -16,7 +16,18 @@ main() {
   print(foo() ? "hello world" : "bad bad");
 }""",
 """function() {
-  P.print(P.identical(V.foo(), true) ? "hello world" : "bad bad");
+  V.foo();
+  P.print("bad bad");
+  return null;
+}"""),
+  const TestEntry("""
+foo() => null;
+main() {
+  print(foo() ? "hello world" : "bad bad");
+}""",
+"""function() {
+  V.foo();
+  P.print("bad bad");
   return null;
 }"""),
   const TestEntry("""
@@ -25,21 +36,25 @@ main() {
   print(foo ? "hello world" : "bad bad");
 }""",
 """function() {
-  P.print(P.identical(V.foo(), true) ? "hello world" : "bad bad");
+  V.foo();
+  P.print("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));
+  V.foo();
+  P.print(false);
   return null;
 }"""),
   const TestEntry("""
 get foo => foo;
 main() { print(foo || foo); }""",
 """function() {
-  P.print(P.identical(V.foo(), true) || P.identical(V.foo(), true));
+  V.foo();
+  V.foo();
+  P.print(false);
   return null;
 }"""),