Eliminate type checks that can successfully be performed at compile time.

runtime/vm/opt_code_generator_ia32.cc

 // 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.
 
 #include "vm/globals.h"  // Needed here to get TARGET_ARCH_IA32.
 #if defined(TARGET_ARCH_IA32)
 
 #include "vm/opt_code_generator.h"
 
 #include "vm/assembler_macros.h"
@@ skipping 2274 matching lines @@
       __ Bind(&done);
     }
     return;
   }
 
   if (Token::IsInstanceofOperator(node->kind())) {
     VisitLoadOne(node->left(), EAX);
     ASSERT(node->right()->IsTypeNode());
     GenerateInstanceOf(node->id(),
                        node->token_index(),
+                       node->left(),
                        node->right()->AsTypeNode()->type(),
                        (node->kind() == Token::kISNOT));
     if (!IsResultNeeded(node)) {
       __ popl(EAX);  // Pop the result of the instanceof operation.
     }
     return;
   }
 
   if (AtIdNodeHasClassAt(node, node->id(), smi_class_, 0)) {
     if (GenerateSmiComparison(node)) {
@@ skipping 761 matching lines @@
     }
   }
   // TODO(srdjan): Implement unary kSUB (negate) Mint.
   CodeGenerator::VisitUnaryOpNode(node);
 }
 
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_IA32