Set output representation of HIsStringAndBranch to tagged.

src/hydrogen-instructions.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_HYDROGEN_INSTRUCTIONS_H_
 #define V8_HYDROGEN_INSTRUCTIONS_H_
 
 #include <iosfwd>
 
 #include "src/v8.h"
@@ skipping 4459 matching lines @@
   void set_known_successor_index(int known_successor_index) {
     known_successor_index_ = known_successor_index;
   }
 
   DECLARE_CONCRETE_INSTRUCTION(IsStringAndBranch)
 
  protected:
   virtual int RedefinedOperandIndex() { return 0; }
 
  private:
-  HIsStringAndBranch(HValue* value,
-                     HBasicBlock* true_target = NULL,
+  HIsStringAndBranch(HValue* value, HBasicBlock* true_target = NULL,
                      HBasicBlock* false_target = NULL)
-    : HUnaryControlInstruction(value, true_target, false_target),
-      known_successor_index_(kNoKnownSuccessorIndex) { }
+      : HUnaryControlInstruction(value, true_target, false_target),
+        known_successor_index_(kNoKnownSuccessorIndex) {
+    set_representation(Representation::Tagged());
+  }
 
   int known_successor_index_;
 };
 
 
 class HIsSmiAndBranch FINAL : public HUnaryControlInstruction {
  public:
   DECLARE_INSTRUCTION_FACTORY_P1(HIsSmiAndBranch, HValue*);
   DECLARE_INSTRUCTION_FACTORY_P3(HIsSmiAndBranch, HValue*,
                                  HBasicBlock*, HBasicBlock*);
@@ skipping 3401 matching lines @@
 };
 
 
 
 #undef DECLARE_INSTRUCTION
 #undef DECLARE_CONCRETE_INSTRUCTION
 
 } }  // namespace v8::internal
 
 #endif  // V8_HYDROGEN_INSTRUCTIONS_H_