Unbox phis that were proven to be of type Double.

runtime/vm/intermediate_language.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/intermediate_language.h"
 
 #include "vm/bit_vector.h"
 #include "vm/dart_entry.h"
 #include "vm/flow_graph_allocator.h"
 #include "vm/flow_graph_builder.h"
@@ skipping 585 matching lines @@
   // Currently, phis are stored in a sparse array that holds the phi
   // for variable with index i at position i.
   // TODO(fschneider): Store phis in a more compact way.
   if (phis_ == NULL) {
     phis_ = new ZoneGrowableArray<PhiInstr*>(var_count);
     for (intptr_t i = 0; i < var_count; i++) {
       phis_->Add(NULL);
     }
   }
   ASSERT((*phis_)[var_index] == NULL);
-  (*phis_)[var_index] = new PhiInstr(PredecessorCount());
+  (*phis_)[var_index] = new PhiInstr(this, PredecessorCount());
   phi_count_++;
 }
 
 
 void JoinEntryInstr::RemoveDeadPhis() {
   if (phis_ == NULL) return;
 
   for (intptr_t i = 0; i < phis_->length(); i++) {
     PhiInstr* phi = (*phis_)[i];
     if ((phi != NULL) && !phi->is_alive()) {
@@ skipping 906 matching lines @@
     value->set_use_index(i);
     value->AddToEnvUseList();
   }
   instr->set_env(copy);
 }
 
 
 #undef __
 
 }  // namespace dart