Disable using CompileType for class check elimination.

runtime/vm/intermediate_language_x64.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/globals.h"  // Needed here to get TARGET_ARCH_X64.
 #if defined(TARGET_ARCH_X64)
 
 #include "vm/intermediate_language.h"
 
 #include "lib/error.h"
@@ skipping 492 matching lines @@
   __ pushq(left);
   __ pushq(right);
   EmitEqualityAsPolymorphicCall(compiler, ic_data, locs, branch, kind,
                                 deopt_id, token_pos, try_index,
                                 locs.stack_bitmap());
   __ Bind(&done);
 }
 
 
 static intptr_t GetCid(const Value& v) {
-  const AbstractType& type = AbstractType::Handle(v.CompileType());
-  return Class::Handle(type.type_class()).id();
+  // TODO(srdjan): CompileType does not give us correct type for optimziations.

[regis, 2012/08/15 00:11:46]

s/optimziations/certain optimizations/

[srdjan, 2012/08/15 00:16:46]

Done.

+  // const AbstractType& type = AbstractType::Handle(v.CompileType());
+  // return Class::Handle(type.type_class()).id();
+  return kIllegalCid;
 }
 
 
 static void EmitSmiComparisonOp(FlowGraphCompiler* compiler,
                                 const LocationSummary& locs,
                                 Token::Kind kind,
                                 BranchInstr* branch,
                                 intptr_t deopt_id,
                                 intptr_t token_pos,
                                 intptr_t try_index) {
@@ skipping 1703 matching lines @@
                                  locs()->stack_bitmap());
   __ CompareObject(RAX, compiler->bool_true());
   EmitBranchOnCondition(compiler, branch_condition);
 }
 
 }  // namespace dart
 
 #undef __
 
 #endif  // defined TARGET_ARCH_X64