Mark map-transition stores as map-changing instructions....

src/hydrogen-instructions.cc

 // Copyright 2010 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 561 matching lines @@
 
 void HBranch::PrintDataTo(StringStream* stream) const {
   int first_id = FirstSuccessor()->block_id();
   int second_id = SecondSuccessor()->block_id();
   stream->Add("on ");
   value()->PrintNameTo(stream);
   stream->Add(" (B%d, B%d)", first_id, second_id);
 }
 
 
+void HCompareMapAndBranch::PrintDataTo(StringStream* stream) const {
+  stream->Add("on ");
+  value()->PrintNameTo(stream);
+  stream->Add(" (%p)", *map());
+}
+
+
 void HGoto::PrintDataTo(StringStream* stream) const {
   stream->Add("B%d", FirstSuccessor()->block_id());
 }
 
 
 void HReturn::PrintDataTo(StringStream* stream) const {
   value()->PrintNameTo(stream);
 }
 
 
@@ skipping 838 matching lines @@
 
 
 void HCheckPrototypeMaps::Verify() const {
   HInstruction::Verify();
   ASSERT(HasNoUses());
 }
 
 #endif
 
 } }  // namespace v8::internal