Introduce nested deoptimization environments.

runtime/vm/il_printer.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/il_printer.h"
 
 #include "vm/intermediate_language.h"
 #include "vm/os.h"
 #include "vm/parser.h"
 
@@ skipping 443 matching lines @@
 
 void GraphEntryInstr::PrintTo(BufferFormatter* f) const {
   f->Print("B%"Pd"[graph]", block_id());
   if ((constant_null() != NULL) || (start_env() != NULL)) {
     f->Print(" {");
     if (constant_null() != NULL) {
       f->Print("\n      ");
       constant_null()->PrintTo(f);
     }
     if (start_env() != NULL) {
-      for (intptr_t i = 0; i < start_env()->values().length(); ++i) {
-        Definition* def = start_env()->values()[i]->definition();
+      for (intptr_t i = 0; i < start_env()->Length(); ++i) {
+        Definition* def = start_env()->ValueAt(i)->definition();
         if (def->IsParameter()) {
           f->Print("\n      ");
           def->PrintTo(f);
         }
       }
     }
     f->Print("\n}");
   }
 }
 
@@ skipping 321 matching lines @@
   for (intptr_t i = 0; i < values_.length(); ++i) {
     if (i > 0) f->Print(", ");
     values_[i]->PrintTo(f);
     if ((locations_ != NULL) && !locations_[i].IsInvalid()) {
       f->Print(" [");
       locations_[i].PrintTo(f);
       f->Print("]");
     }
   }
   f->Print(" }");
+  if (outer_ != NULL) outer_->PrintTo(f);
 }
 
 }  // namespace dart