Reapply "Deoptimization support in inlined code."

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 769 matching lines @@
 }
 
 
 void ParallelMoveInstr::PrintToVisualizer(BufferFormatter* f) const {
   UNIMPLEMENTED();
 }
 
 
 void Environment::PrintTo(BufferFormatter* f) const {
   f->Print(" env={ ");
+  int arg_count = 0;
   for (intptr_t i = 0; i < values_.length(); ++i) {
     if (i > 0) f->Print(", ");
-    values_[i]->PrintTo(f);
+    if (values_[i]->definition()->IsPushArgument()) {
+      f->Print("a%d", arg_count++);
+    } else {
+      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