Fix HasResult method of LTemplateInstruction to properly handle LCheckSmi

src/x64/lithium-x64.h

Index: src/x64/lithium-x64.h
diff --git a/src/x64/lithium-x64.h b/src/x64/lithium-x64.h
index 50e32d8cd61ee999fd915aed6ddd4dc3ce0b3d07..ee3bc41824c9bb0cabea704ffc5b4c78ff19b760 100644
--- a/src/x64/lithium-x64.h
+++ b/src/x64/lithium-x64.h
@@ -266,7 +266,7 @@ class LInstruction: public ZoneObject {
   bool IsMarkedAsCall() const { return is_call_; }
 
   virtual bool HasResult() const = 0;
-  virtual LOperand* result() = 0;
+  virtual LOperand* result() const = 0;
 
   LOperand* FirstInput() { return InputAt(0); }
   LOperand* Output() { return HasResult() ? result() : NULL; }
@@ -302,9 +302,9 @@ 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_;