Fix issues 5137: instance of test on constant value should return true or false, not the value itse…

runtime/vm/flow_graph_optimizer.h

 // 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.
 
 #ifndef VM_FLOW_GRAPH_OPTIMIZER_H_
 #define VM_FLOW_GRAPH_OPTIMIZER_H_
 
 #include "vm/intermediate_language.h"
 #include "vm/flow_graph.h"
 
@@ skipping 77 matching lines @@
 
   DISALLOW_COPY_AND_ASSIGN(FlowGraphAnalyzer);
 };
 
 
 class ParsedFunction;
 
 
 class FlowGraphTypePropagator : public FlowGraphVisitor {
  public:
-  explicit FlowGraphTypePropagator(const FlowGraph& flow_graph)
-      : FlowGraphVisitor(flow_graph.reverse_postorder()),
-        parsed_function_(flow_graph.parsed_function()),
+  explicit FlowGraphTypePropagator(FlowGraph* flow_graph)
+      : FlowGraphVisitor(flow_graph->reverse_postorder()),
+        parsed_function_(flow_graph->parsed_function()),
+        flow_graph_(flow_graph),
         still_changing_(false) { }
   virtual ~FlowGraphTypePropagator() { }
 
   const ParsedFunction& parsed_function() const { return parsed_function_; }
 
   void PropagateTypes();
 
  private:
   virtual void VisitBlocks();
 
   virtual void VisitAssertAssignable(AssertAssignableInstr* instr);
   virtual void VisitAssertBoolean(AssertBooleanInstr* instr);
   virtual void VisitInstanceOf(InstanceOfInstr* instr);
 
   virtual void VisitGraphEntry(GraphEntryInstr* graph_entry);
   virtual void VisitJoinEntry(JoinEntryInstr* join_entry);
   virtual void VisitPhi(PhiInstr* phi);
   virtual void VisitParameter(ParameterInstr* param);
   virtual void VisitPushArgument(PushArgumentInstr* bind);
 
   const ParsedFunction& parsed_function_;
+  FlowGraph* flow_graph_;
   bool still_changing_;
   DISALLOW_COPY_AND_ASSIGN(FlowGraphTypePropagator);
 };
 
 
 // Loop invariant code motion.
 class LICM : public AllStatic {
  public:
   static void Optimize(FlowGraph* flow_graph);
 
@@ skipping 18 matching lines @@
  private:
   static void OptimizeRecursive(
       BlockEntryInstr* entry,
       DirectChainedHashMap<Definition*>* map);
 };
 
 
 }  // namespace dart
 
 #endif  // VM_FLOW_GRAPH_OPTIMIZER_H_