In strict comarison use constants instead of registers if possible.

tests/language/strict_equal_test.dart

Index: tests/language/strict_equal_test.dart
===================================================================
--- tests/language/strict_equal_test.dart	(revision 0)
+++ tests/language/strict_equal_test.dart	(revision 0)
@@ -0,0 +1,77 @@
+// Copyright (c) 2011, 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.
+
+
+main() {
+  for (int i = 0; i < 6000; i++) {
+    Expect.isFalse(test1(5));
+    Expect.isTrue(test1(3));
+
+    Expect.isTrue(test2(5));
+    Expect.isFalse(test2(3));
+
+    Expect.isTrue(test2r(5));
+    Expect.isFalse(test2r(3));
+
+    Expect.isTrue(test3());
+
+    Expect.equals(2, test4(5));
+    Expect.equals(1, test4(3));
+
+    Expect.equals(1, test5(5));
+    Expect.equals(2, test5(3));
+
+    Expect.equals(1, test6());
+  }
+}
+
+
+test1(a) {
+  return a === 3;
+}
+
+test2(a) {
+  return a !== 3;
+}
+
+
+test2r(a) {
+  return 3 !== a;
+}
+
+
+test3() {
+  return get5() === 5;
+}
+
+
+test4(a) {
+  if (a === 3) {
+    return 1;
+  } else {
+    return 2;
+  }
+}
+
+
+test5(a) {
+  if (a !== 3) {
+    return 1;
+  } else {
+    return 2;
+  }
+}
+
+
+test6() {
+  if (get5() === 5) {
+    return 1;
+  } else {
+    return 2;
+  }
+}
+
+get5() {
+  return 5;
+}