VectorICs: use a vector slot to aid in array literal processing.

src/full-codegen/mips/full-codegen-mips.cc

Index: src/full-codegen/mips/full-codegen-mips.cc
diff --git a/src/full-codegen/mips/full-codegen-mips.cc b/src/full-codegen/mips/full-codegen-mips.cc
index 537cb0918e89233d69885a9fc6e39cb2801655d3..eb41ea0ee36fb662db8423937b6de3f4f3008dde 100644
--- a/src/full-codegen/mips/full-codegen-mips.cc
+++ b/src/full-codegen/mips/full-codegen-mips.cc
@@ -1750,8 +1750,6 @@ void FullCodeGenerator::VisitObjectLiteral(ObjectLiteral* expr) {
 void FullCodeGenerator::VisitArrayLiteral(ArrayLiteral* expr) {
   Comment cmnt(masm_, "[ ArrayLiteral");
 
-  expr->BuildConstantElements(isolate());
-
   Handle<FixedArray> constant_elements = expr->constant_elements();
   bool has_fast_elements =
       IsFastObjectElementsKind(expr->constant_elements_kind());
@@ -1801,7 +1799,16 @@ void FullCodeGenerator::VisitArrayLiteral(ArrayLiteral* expr) {
 
     VisitForAccumulatorValue(subexpr);
 
-    if (has_fast_elements) {
+    if (FLAG_vector_stores) {
+      __ li(StoreDescriptor::NameRegister(),
+            Operand(Smi::FromInt(array_index)));
+      __ lw(StoreDescriptor::ReceiverRegister(), MemOperand(sp, kPointerSize));
+      __ mov(StoreDescriptor::ValueRegister(), result_register());
+      EmitLoadStoreICSlot(expr->LiteralFeedbackSlot());
+      Handle<Code> ic =
+          CodeFactory::KeyedStoreIC(isolate(), language_mode()).code();
+      CallIC(ic);
+    } else if (has_fast_elements) {
       int offset = FixedArray::kHeaderSize + (array_index * kPointerSize);
       __ lw(t2, MemOperand(sp, kPointerSize));  // Copy of array literal.
       __ lw(a1, FieldMemOperand(t2, JSObject::kElementsOffset));