Add PC descriptor for ret instruction

runtime/vm/object.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_OBJECT_H_
 #define VM_OBJECT_H_
 
 #include "include/dart_api.h"
 #include "platform/assert.h"
 #include "platform/utils.h"
@@ skipping 1887 matching lines @@
   friend class Class;
 };
 
 
 class PcDescriptors : public Object {
  public:
   enum Kind {
     kDeopt = 0,  // Deoptimization cotinuation point.
     kPatchCode,  // Buffer for patching code entry.
     kIcCall,     // IC call.
+    kReturn,     // Return from function.
     kOther
   };
 
   intptr_t Length() const;
 
   uword PC(intptr_t index) const;
   PcDescriptors::Kind DescriptorKind(intptr_t index) const;
   const char* KindAsStr(intptr_t index) const;
   intptr_t NodeId(intptr_t index) const;
   intptr_t TokenIndex(intptr_t index) const;
@@ skipping 1725 matching lines @@
 }
 
 
 void Context::SetAt(intptr_t index, const Instance& value) const {
   StorePointer(InstanceAddr(index), value.raw());
 }
 
 }  // namespace dart
 
 #endif  // VM_OBJECT_H_