Unbox phis that were proven to be of type Double.

runtime/vm/locations.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/locations.h"
 
 #include "vm/il_printer.h"
 #include "vm/intermediate_language.h"
 #include "vm/flow_graph_compiler.h"
 
@@ skipping 59 matching lines @@
       ASSERT(IsConstant());
       return "C";
   }
   return "?";
 }
 
 
 void Location::PrintTo(BufferFormatter* f) const {
   if (kind() == kStackSlot) {
     f->Print("S%+d", stack_index());
+  } else if (kind() == kDoubleStackSlot) {
+    f->Print("DS%+d", stack_index());
   } else {
     f->Print("%s", Name());
   }
 }
 
 
 void Location::Print() const {
   if (kind() == kStackSlot) {
     OS::Print("S%+d", stack_index());
   } else {
@@ skipping 23 matching lines @@
 
   if (!out().IsInvalid()) {
     f->Print(" => ");
     out().PrintTo(f);
   }
 
   if (always_calls()) f->Print(" C");
 }
 
 }  // namespace dart