New compiler, intermediate language, type testing and casting changes as agreed with Kevin.

runtime/vm/intermediate_language_test.cc

Index: runtime/vm/intermediate_language_test.cc
===================================================================
--- runtime/vm/intermediate_language_test.cc	(revision 0)
+++ runtime/vm/intermediate_language_test.cc	(revision 0)
@@ -0,0 +1,21 @@
+// Copyright (c) 2012, 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.
+
+#include "vm/intermediate_language.h"
+#include "vm/unit_test.h"
+
+namespace dart {
+
+TEST_CASE(InstructionTests) {
+  TargetEntryInstr* target_instr = new TargetEntryInstr();
+  EXPECT(target_instr->IsBlockEntry());
+  EXPECT(!target_instr->IsDo());
+  EXPECT(!target_instr->IsBind());
+  DoInstr* do_instr = new DoInstr(NULL);
+  EXPECT(do_instr->IsDo());
+  EXPECT(!do_instr->IsBlockEntry());
+  EXPECT(!do_instr->IsBind());
+}
+
+}  // namespace dart