Added Object._cid getter, optimized it. Added to (some) classes a static final _clCid. Use those to…

runtime/vm/flow_graph_optimizer.cc

 // Copyright (c) 2013, 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/flow_graph_optimizer.h"
 
 #include "vm/bit_vector.h"
 #include "vm/cha.h"
 #include "vm/flow_graph_builder.h"
 #include "vm/flow_graph_compiler.h"
@@ skipping 1359 matching lines @@
 
   ConstantInstr* zero = flow_graph()->GetConstant(Smi::Handle(Smi::New(0)));
   StrictCompareInstr* compare =
       new StrictCompareInstr(Token::kEQ_STRICT,
                              new Value(load),
                              new Value(zero));
   ReplaceCall(call, compare);
 }
 
 
+void FlowGraphOptimizer::InlineObjectCid(InstanceCallInstr* call) {
+  LoadClassIdInstr* load = new LoadClassIdInstr(new Value(call->ArgumentAt(0)));
+  ReplaceCall(call, load);
+}
+
+
 static intptr_t OffsetForLengthGetter(MethodRecognizer::Kind kind) {
   switch (kind) {
     case MethodRecognizer::kObjectArrayLength:
     case MethodRecognizer::kImmutableArrayLength:
       return Array::length_offset();
     case MethodRecognizer::kTypedDataLength:
       // .length is defined in _TypedList which is the base class for internal
       // and external typed data.
       ASSERT(TypedData::length_offset() == ExternalTypedData::length_offset());
       return TypedData::length_offset();
@@ skipping 42 matching lines @@
   } else if (target.kind() == RawFunction::kMethodExtractor) {
     return false;
   }
 
   // Not an implicit getter.
   MethodRecognizer::Kind recognized_kind =
       MethodRecognizer::RecognizeKind(target);
 
   // VM objects length getter.
   switch (recognized_kind) {
+    case MethodRecognizer::kObjectCid: {
+      InlineObjectCid(call);
+      return true;
+    }
     case MethodRecognizer::kObjectArrayLength:
     case MethodRecognizer::kImmutableArrayLength:
     case MethodRecognizer::kTypedDataLength:
     case MethodRecognizer::kGrowableArrayLength: {
       if (!ic_data.HasOneTarget()) {
         // TODO(srdjan): Implement for mutiple targets.
         return false;
       }
       const bool is_immutable =
           (recognized_kind == MethodRecognizer::kObjectArrayLength) ||
@@ skipping 4702 matching lines @@
 
   // Insert materializations at environment uses.
   const Class& cls = Class::Handle(alloc->constructor().Owner());
   for (intptr_t i = 0; i < exits.length(); i++) {
     CreateMaterializationAt(exits[i], alloc, cls, *fields);
   }
 }
 
 
 }  // namespace dart