Refactor types in ssa nodes.

frog/tests/leg/src/TypeInference5Test.dart

+// 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.
+
+#import("compiler_helper.dart");
+
+final String TEST_ONE = @"""
+foo(j) {
+  var a = [1, 2, 3];
+  for (var i = j; i < 3; i++) {
+    a[i];
+  }
+}
+""";
+
+main() {
+  String generated = compile(TEST_ONE, 'foo');
+
+  // Test for absence of an illegal argument exception. This means that the
+  // arguments are known to be integers.
+  Expect.isFalse(generated.contains('iae'));
+  // Also make sure that we are not just in bailout mode without speculative
+  // types by grepping for the integer-bailout check on argument j.
+  RegExp regexp = new RegExp(getIntTypeCheck('j'));
+  Expect.isTrue(regexp.hasMatch(generated));
+}