Eliminate temporary locals for some expressions

runtime/vm/flow_graph_optimizer.cc

 // Copyright (c) 2013, 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_optimizer.h"
 
 #include "vm/bit_vector.h"
 #include "vm/cha.h"
 #include "vm/flow_graph_builder.h"
 #include "vm/flow_graph_compiler.h"
@@ skipping 5043 matching lines @@
   SetValue(instr, non_constant_);
 }
 
 
 void ConstantPropagator::VisitLoadLocal(LoadLocalInstr* instr) {
   // Instruction is eliminated when translating to SSA.
   UNREACHABLE();
 }
 
 
+void ConstantPropagator::VisitPushTemp(PushTempInstr* instr) {
+  // Instruction is eliminated when translating to SSA.
+  UNREACHABLE();
+}
+
+
+void ConstantPropagator::VisitDropTemps(DropTempsInstr* instr) {
+  // Instruction is eliminated when translating to SSA.
+  UNREACHABLE();
+}
+
+
 void ConstantPropagator::VisitStoreLocal(StoreLocalInstr* instr) {
   // Instruction is eliminated when translating to SSA.
   UNREACHABLE();
 }
 
 
 void ConstantPropagator::VisitIfThenElse(IfThenElseInstr* instr) {
   ASSERT(Token::IsEqualityOperator(instr->kind()));
 
   const Object& left = instr->left()->definition()->constant_value();
@@ skipping 1461 matching lines @@
 
   // Insert materializations at environment uses.
   const Class& cls = Class::Handle(alloc->constructor().Owner());
   for (intptr_t i = 0; i < exits.length(); i++) {
     CreateMaterializationAt(exits[i], alloc, cls, *fields);
   }
 }
 
 
 }  // namespace dart