Eliminate class UseVal.

runtime/vm/flow_graph_builder.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/flow_graph_builder.h"
 
 #include "vm/ast_printer.h"
 #include "vm/code_descriptors.h"
 #include "vm/dart_entry.h"
 #include "vm/flags.h"
@@ skipping 44 matching lines @@
     entry_ = other_fragment.entry();
     exit_ = other_fragment.exit();
   } else {
     exit()->set_next(other_fragment.entry());
     exit_ = other_fragment.exit();
   }
   temp_index_ = other_fragment.temp_index();
 }
 
 
-UseVal* EffectGraphVisitor::Bind(Computation* computation) {
+Value* EffectGraphVisitor::Bind(Computation* computation) {
   ASSERT(is_open());
   DeallocateTempIndex(computation->InputCount());
   BindInstr* bind_instr = new BindInstr(BindInstr::kUsed, computation);
   bind_instr->set_temp_index(AllocateTempIndex());
   if (is_empty()) {
     entry_ = bind_instr;
   } else {
     exit()->set_next(bind_instr);
   }
   exit_ = bind_instr;
-  return new UseVal(bind_instr);
+  return new Value(bind_instr);
 }
 
 
 void EffectGraphVisitor::Do(Computation* computation) {
   ASSERT(is_open());
   DeallocateTempIndex(computation->InputCount());
   BindInstr* do_instr = new BindInstr(BindInstr::kUnused, computation);
   if (is_empty()) {
     entry_ = do_instr;
   } else {
@@ skipping 1594 matching lines @@
   //   t1 = ExtractConstructorInstantiator(t1);
   //   t_n   <- t2
   //   t_n+1 <- t1
   // Use expression_temp_var and node->allocated_object_var() locals to keep
   // intermediate results around (t1 and t2 above).
   ASSERT(owner()->parsed_function().expression_temp_var() != NULL);
   const LocalVariable& t1 = *owner()->parsed_function().expression_temp_var();
   const LocalVariable& t2 = node->allocated_object_var();
   Value* instantiator_type_arguments = BuildInstantiatorTypeArguments(
       node->token_pos(), NULL);
-  ASSERT(instantiator_type_arguments->IsUse());
   Value* stored_instantiator =
       Bind(BuildStoreLocal(t1, instantiator_type_arguments));
   // t1: instantiator type arguments.
 
   Value* extract_type_arguments = Bind(
       new ExtractConstructorTypeArgumentsComp(
           node->token_pos(),
           owner()->try_index(),
           node->type_arguments(),
           stored_instantiator));
@@ skipping 717 matching lines @@
   intptr_t len = OS::SNPrint(NULL, 0, kFormat, function_name, reason) + 1;
   char* chars = Isolate::Current()->current_zone()->Alloc<char>(len);
   OS::SNPrint(chars, len, kFormat, function_name, reason);
   const Error& error = Error::Handle(
       LanguageError::New(String::Handle(String::New(chars))));
   Isolate::Current()->long_jump_base()->Jump(1, error);
 }
 
 
 }  // namespace dart