Set statically known ResultCid for AllocateObject.

runtime/vm/intermediate_language.h

 // 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.
 
 #ifndef VM_INTERMEDIATE_LANGUAGE_H_
 #define VM_INTERMEDIATE_LANGUAGE_H_
 
 #include "vm/allocation.h"
 #include "vm/ast.h"
 #include "vm/growable_array.h"
@@ skipping 2894 matching lines @@
   const bool negate_result_;
 
   DISALLOW_COPY_AND_ASSIGN(InstanceOfInstr);
 };
 
 
 class AllocateObjectInstr : public TemplateDefinition<0> {
  public:
   AllocateObjectInstr(ConstructorCallNode* node,
                       ZoneGrowableArray<PushArgumentInstr*>* arguments)
-      : ast_node_(*node), arguments_(arguments) {
+      : ast_node_(*node),
+        arguments_(arguments),
+        cid_(Class::Handle(node->constructor().Owner()).id()) {
     // Either no arguments or one type-argument and one instantiator.
     ASSERT(arguments->is_empty() || (arguments->length() == 2));
   }
 
   DECLARE_INSTRUCTION(AllocateObject)
   virtual RawAbstractType* CompileType() const;
 
   virtual intptr_t ArgumentCount() const { return arguments_->length(); }
   PushArgumentInstr* ArgumentAt(intptr_t index) const {
     return (*arguments_)[index];
   }
 
   const Function& constructor() const { return ast_node_.constructor(); }
   intptr_t token_pos() const { return ast_node_.token_pos(); }
 
   virtual void PrintOperandsTo(BufferFormatter* f) const;
 
   virtual bool CanDeoptimize() const { return false; }
 
   virtual bool HasSideEffect() const { return true; }
 
-  virtual intptr_t ResultCid() const { return kDynamicCid; }
+  virtual intptr_t ResultCid() const { return cid_; }
 
  private:
   const ConstructorCallNode& ast_node_;
   ZoneGrowableArray<PushArgumentInstr*>* const arguments_;
+  const intptr_t cid_;
 
   DISALLOW_COPY_AND_ASSIGN(AllocateObjectInstr);
 };
 
 
 class AllocateObjectWithBoundsCheckInstr : public TemplateDefinition<2> {
  public:
   AllocateObjectWithBoundsCheckInstr(ConstructorCallNode* node,
                                      Value* type_arguments,
                                      Value* instantiator)
@@ skipping 1434 matching lines @@
   ForwardInstructionIterator* current_iterator_;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(FlowGraphVisitor);
 };
 
 
 }  // namespace dart
 
 #endif  // VM_INTERMEDIATE_LANGUAGE_H_