ARM64: Small optimisations

src/arm64/lithium-arm64.h

Index: src/arm64/lithium-arm64.h
diff --git a/src/arm64/lithium-arm64.h b/src/arm64/lithium-arm64.h
index 62384c4dc864a28d5cbab674aef0687c6a30c11b..85629c4814504666b0652737e670c1d9f4266fc6 100644
--- a/src/arm64/lithium-arm64.h
+++ b/src/arm64/lithium-arm64.h
@@ -1041,17 +1041,15 @@ class LDoubleBits V8_FINAL : public LTemplateInstruction<1, 1, 0> {
 };
 
 
-class LConstructDouble V8_FINAL : public LTemplateInstruction<1, 2, 1> {
+class LConstructDouble V8_FINAL : public LTemplateInstruction<1, 2, 0> {
  public:
-  LConstructDouble(LOperand* hi, LOperand* lo, LOperand* temp) {
+  LConstructDouble(LOperand* hi, LOperand* lo) {
     inputs_[0] = hi;
     inputs_[1] = lo;
-    temps_[0] = temp;
   }
 
   LOperand* hi() { return inputs_[0]; }
   LOperand* lo() { return inputs_[1]; }
-  LOperand* temp() { return temps_[0]; }
 
   DECLARE_CONCRETE_INSTRUCTION(ConstructDouble, "construct-double")
 };