Eliminate class UseVal.

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 132 matching lines @@
 
 
 void Computation::PrintOperandsTo(BufferFormatter* f) const {
   for (int i = 0; i < InputCount(); ++i) {
     if (i > 0) f->Print(", ");
     if (InputAt(i) != NULL) InputAt(i)->PrintTo(f);
   }
 }
 
 
-void UseVal::PrintTo(BufferFormatter* f) const {
+void Value::PrintTo(BufferFormatter* f) const {
   if (definition()->HasSSATemp()) {
     f->Print("v%d", definition()->ssa_temp_index());
   } else {
     f->Print("t%d", definition()->temp_index());
   }
 }
 
 
 void ConstantComp::PrintOperandsTo(BufferFormatter* f) const {
   f->Print("#%s", value().ToCString());
@@ skipping 258 matching lines @@
   f->Print("}");
 }
 
 
 void GraphEntryInstr::PrintTo(BufferFormatter* f) const {
   f->Print("%2d: [graph]", block_id());
   if (start_env_ != NULL) {
     f->Print("\n{\n");
     const GrowableArray<Value*>& values = start_env_->values();
     for (intptr_t i = 0; i < values.length(); i++) {
-      if (values[i]->IsUse()) {
-        Definition* def = values[i]->AsUse()->definition();
-        f->Print("  ", i);
-        def->PrintTo(f);
-        f->Print("\n");
-      }
+      Definition* def = values[i]->definition();
+      f->Print("  ", i);
+      def->PrintTo(f);
+      f->Print("\n");
     }
     f->Print("} ");
     start_env_->PrintTo(f);
   }
 }
 
 
 void JoinEntryInstr::PrintTo(BufferFormatter* f) const {
   f->Print("%2d: [join]", block_id());
   if (phis_ != NULL) {
@@ skipping 362 matching lines @@
     if ((locations_ != NULL) && !locations_[i].IsInvalid()) {
       f->Print(" [");
       locations_[i].PrintTo(f);
       f->Print("]");
     }
   }
   f->Print(" }");
 }
 
 }  // namespace dart