Add stack check in loops so that loops can be stopped. Optimize relational operations.

runtime/vm/il_printer.cc

 // 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/il_printer.h"
 
 #include "vm/intermediate_language.h"
 #include "vm/os.h"
 
 namespace dart {
@@ skipping 205 matching lines @@
             String::Handle(type().Name()).ToCString());
   f->Print(" (instantiator:");
   instantiator()->PrintTo(f);
   f->Print(")");
   f->Print(" (type-arg:");
   instantiator_type_arguments()->PrintTo(f);
   f->Print(")");
 }
 
 
+void RelationalOpComp::PrintOperandsTo(BufferFormatter* f) const {
+  f->Print("%s, ", Token::Str(kind()));
+  left()->PrintTo(f);
+  f->Print(", ");
+  right()->PrintTo(f);
+}
+
+
 void AllocateObjectComp::PrintOperandsTo(BufferFormatter* f) const {
   f->Print("%s", Class::Handle(constructor().owner()).ToCString());
   for (intptr_t i = 0; i < arguments().length(); i++) {
     f->Print(", ");
     arguments()[i]->PrintTo(f);
   }
 }
 
 
 void AllocateObjectWithBoundsCheckComp::PrintOperandsTo(
@@ skipping 318 matching lines @@
   f->Print("_ %s ", DebugName());
   f->Print("if ");
   value()->PrintTo(f);
   f->Print(" goto (B%d, B%d)",
             true_successor()->block_id(),
             false_successor()->block_id());
 }
 
 
 }  // namespace dart