Fix a bug in Equals for UseVal and ConstantVal.

runtime/vm/intermediate_language.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/intermediate_language.h"
 
 #include "vm/bit_vector.h"
 #include "vm/dart_entry.h"
 #include "vm/flow_graph_allocator.h"
 #include "vm/flow_graph_builder.h"
@@ skipping 26 matching lines @@
 
 bool Computation::Equals(Computation* other) const {
   if (computation_kind() != other->computation_kind()) return false;
   for (intptr_t i = 0; i < InputCount(); ++i) {
     if (!InputAt(i)->Equals(other->InputAt(i))) return false;
   }
   return AttributesEqual(other);
 }
 
 
+bool UseVal::AttributesEqual(Computation* other) const {
+  return other->IsUse()
+      && definition() == other->AsUse()->definition();
+}
+
+
+bool ConstantVal::AttributesEqual(Computation* other) const {
+  return other->IsConstant()
+      && value().raw() == other->AsConstant()->value().raw();
+}
+
+
 bool CheckClassComp::AttributesEqual(Computation* other) const {
   CheckClassComp* other_check = other->AsCheckClass();
   if (other_check == NULL) return false;
   if (ic_data()->NumberOfChecks() != other->ic_data()->NumberOfChecks()) {
     return false;
   }
   for (intptr_t i = 0; i < ic_data()->NumberOfChecks(); ++i) {
     // TODO(fschneider): Make sure ic_data are sorted to hit more cases.
     if (ic_data()->GetReceiverClassIdAt(i) !=
         other->ic_data()->GetReceiverClassIdAt(i)) {
@@ skipping 1458 matching lines @@
       fixed_parameter_count_(fixed_parameter_count) {
   for (intptr_t i = 0; i < definitions.length(); ++i) {
     values_.Add(UseDefinition(definitions[i]));
   }
 }
 
 
 #undef __
 
 }  // namespace dart