Support allocation sinking for compound objects.

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 489 matching lines @@
   right()->PrintTo(f);
 }
 
 
 void AllocateObjectInstr::PrintOperandsTo(BufferFormatter* f) const {
   f->Print("%s", cls().ToCString());
   for (intptr_t i = 0; i < ArgumentCount(); i++) {
     f->Print(", ");
     PushArgumentAt(i)->value()->PrintTo(f);
   }
+
+  if (Identity().IsNotAliased()) {
+    f->Print(" <not-aliased>");
+  }
 }
 
 
 void MaterializeObjectInstr::PrintOperandsTo(BufferFormatter* f) const {
   f->Print("%s", String::Handle(cls_.Name()).ToCString());
   for (intptr_t i = 0; i < InputCount(); i++) {
     f->Print(", ");
     f->Print("%s: ", slots_[i]->ToCString());
     InputAt(i)->PrintTo(f);
   }
@@ skipping 563 matching lines @@
 }
 
 const char* Environment::ToCString() const {
   char buffer[1024];
   BufferFormatter bf(buffer, 1024);
   PrintTo(&bf);
   return Isolate::Current()->current_zone()->MakeCopyOfString(buffer);
 }
 
 }  // namespace dart