[compiler] No need to push literal index in VisitArrayLiteral.

src/full-codegen/x64/full-codegen-x64.cc

Index: src/full-codegen/x64/full-codegen-x64.cc
diff --git a/src/full-codegen/x64/full-codegen-x64.cc b/src/full-codegen/x64/full-codegen-x64.cc
index c181b6954c6fc927fe2be41f74b142d8e757da9c..c259c1e3c5b4bf2f419ace7445c571332c7544bc 100644
--- a/src/full-codegen/x64/full-codegen-x64.cc
+++ b/src/full-codegen/x64/full-codegen-x64.cc
@@ -1715,13 +1715,12 @@ void FullCodeGenerator::VisitArrayLiteral(ArrayLiteral* expr) {
 
     if (!result_saved) {
       __ Push(rax);  // array literal
-      __ Push(Smi::FromInt(expr->literal_index()));
       result_saved = true;
     }
     VisitForAccumulatorValue(subexpr);
 
     __ Move(StoreDescriptor::NameRegister(), Smi::FromInt(array_index));
-    __ movp(StoreDescriptor::ReceiverRegister(), Operand(rsp, kPointerSize));
+    __ movp(StoreDescriptor::ReceiverRegister(), Operand(rsp, 0));
     EmitLoadStoreICSlot(expr->LiteralFeedbackSlot());
     Handle<Code> ic =
         CodeFactory::KeyedStoreIC(isolate(), language_mode()).code();
@@ -1736,7 +1735,6 @@ void FullCodeGenerator::VisitArrayLiteral(ArrayLiteral* expr) {
   // (inclusive) and these elements gets appended to the array. Note that the
   // number elements an iterable produces is unknown ahead of time.
   if (array_index < length && result_saved) {
-    __ Drop(1);  // literal index
     __ Pop(rax);
     result_saved = false;
   }
@@ -1757,7 +1755,6 @@ void FullCodeGenerator::VisitArrayLiteral(ArrayLiteral* expr) {
   }
 
   if (result_saved) {
-    __ Drop(1);  // literal index
     context()->PlugTOS();
   } else {
     context()->Plug(rax);