Fix HasResult method of LTemplateInstruction to properly handle LCheckSmi

src/ia32/lithium-ia32.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 253 matching lines @@
   bool ClobbersRegisters() const { return is_call_; }
   virtual bool ClobbersDoubleRegisters() const {
     return is_call_ ||
       (!CpuFeatures::IsSupported(SSE2) &&
        // We only have rudimentary X87Stack tracking, thus in general
        // cannot handle deoptimization nor phi-nodes.
        (HasEnvironment() || IsControl()));
   }
 
   virtual bool HasResult() const = 0;
-  virtual LOperand* result() = 0;
+  virtual LOperand* result() const = 0;
 
   bool HasDoubleRegisterResult();
   bool HasDoubleRegisterInput();
   bool IsDoubleInput(X87Register reg, LCodeGen* cgen);
 
   LOperand* FirstInput() { return InputAt(0); }
   LOperand* Output() { return HasResult() ? result() : NULL; }
 
   virtual bool HasInterestingComment(LCodeGen* gen) const { return true; }
 
@@ skipping 19 matching lines @@
 
 
 // R = number of result operands (0 or 1).
 // I = number of input operands.
 // T = number of temporary operands.
 template<int R, int I, int T>
 class LTemplateInstruction: public LInstruction {
  public:
   // Allow 0 or 1 output operands.
   STATIC_ASSERT(R == 0 || R == 1);
-  virtual bool HasResult() const { return R != 0; }
+  virtual bool HasResult() const { return R != 0 && result() != NULL; }
   void set_result(LOperand* operand) { results_[0] = operand; }
-  LOperand* result() { return results_[0]; }
+  LOperand* result() const { return results_[0]; }
 
  protected:
   EmbeddedContainer<LOperand*, R> results_;
   EmbeddedContainer<LOperand*, I> inputs_;
   EmbeddedContainer<LOperand*, T> temps_;
 
  private:
   // Iterator support.
   virtual int InputCount() { return I; }
   virtual LOperand* InputAt(int i) { return inputs_[i]; }
@@ skipping 2613 matching lines @@
 
   DISALLOW_COPY_AND_ASSIGN(LChunkBuilder);
 };
 
 #undef DECLARE_HYDROGEN_ACCESSOR
 #undef DECLARE_CONCRETE_INSTRUCTION
 
 } }  // namespace v8::internal
 
 #endif  // V8_IA32_LITHIUM_IA32_H_