Add PC descriptor for ret instruction

runtime/vm/object.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/object.h"
 
 #include "platform/assert.h"
 #include "vm/assembler.h"
 #include "vm/bigint_operations.h"
 #include "vm/bootstrap.h"
@@ skipping 4845 matching lines @@
     NoGCScope no_gc;
     result ^= raw;
     result.SetLength(num_descriptors);
   }
   return result.raw();
 }
 
 
 const char* PcDescriptors::KindAsStr(intptr_t index) const {
   switch (DescriptorKind(index)) {
-    case (PcDescriptors::kDeopt) : return "deopt";
-    case (PcDescriptors::kPatchCode) : return "patch";
-    case (PcDescriptors::kIcCall) : return "ic-call";
-    case (PcDescriptors::kOther) : return "other";
+    case PcDescriptors::kDeopt: return "deopt";
+    case PcDescriptors::kPatchCode: return "patch";
+    case PcDescriptors::kIcCall: return "ic-call";
+    case PcDescriptors::kReturn: return "return";
+    case PcDescriptors::kOther: return "other";
   }
   UNREACHABLE();
   return "";
 }
 
 
 const char* PcDescriptors::ToCString() const {
   if (Length() == 0) {
     return "No pc descriptors\n";
   }
@@ skipping 3096 matching lines @@
   const String& str = String::Handle(pattern());
   const char* format = "JSRegExp: pattern=%s flags=%s";
   intptr_t len = OS::SNPrint(NULL, 0, format, str.ToCString(), Flags());
   char* chars = reinterpret_cast<char*>(
       Isolate::Current()->current_zone()->Allocate(len + 1));
   OS::SNPrint(chars, (len + 1), format, str.ToCString(), Flags());
   return chars;
 }
 
 }  // namespace dart