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

src/full-codegen/ia32/full-codegen-ia32.cc

Index: src/full-codegen/ia32/full-codegen-ia32.cc
diff --git a/src/full-codegen/ia32/full-codegen-ia32.cc b/src/full-codegen/ia32/full-codegen-ia32.cc
index 250b476eafd65af101291b8c5d61fb0d87b38d31..8390ba7a45aabb79bb99cd5da795c3df3a49dd6d 100644
--- a/src/full-codegen/ia32/full-codegen-ia32.cc
+++ b/src/full-codegen/ia32/full-codegen-ia32.cc
@@ -1675,7 +1675,6 @@ 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_constant_fast_elements =
       IsFastObjectElementsKind(expr->constant_elements_kind());
@@ -1726,7 +1725,15 @@ void FullCodeGenerator::VisitArrayLiteral(ArrayLiteral* expr) {
     }
     VisitForAccumulatorValue(subexpr);
 
-    if (has_constant_fast_elements) {
+    if (FLAG_vector_stores) {
+      __ mov(StoreDescriptor::NameRegister(),
+             Immediate(Smi::FromInt(array_index)));
+      __ mov(StoreDescriptor::ReceiverRegister(), Operand(esp, kPointerSize));
+      EmitLoadStoreICSlot(expr->LiteralFeedbackSlot());
+      Handle<Code> ic =
+          CodeFactory::KeyedStoreIC(isolate(), language_mode()).code();
+      CallIC(ic);
+    } else if (has_constant_fast_elements) {
       // Fast-case array literal with ElementsKind of FAST_*_ELEMENTS, they
       // cannot transition and don't need to call the runtime stub.
       int offset = FixedArray::kHeaderSize + (array_index * kPointerSize);
@@ -1735,17 +1742,14 @@ void FullCodeGenerator::VisitArrayLiteral(ArrayLiteral* expr) {
       // Store the subexpression value in the array's elements.
       __ mov(FieldOperand(ebx, offset), result_register());
       // Update the write barrier for the array store.
-      __ RecordWriteField(ebx, offset, result_register(), ecx,
-                          kDontSaveFPRegs,
-                          EMIT_REMEMBERED_SET,
-                          INLINE_SMI_CHECK);
+      __ RecordWriteField(ebx, offset, result_register(), ecx, kDontSaveFPRegs,
+                          EMIT_REMEMBERED_SET, INLINE_SMI_CHECK);
     } else {
       // Store the subexpression value in the array's elements.
       __ mov(ecx, Immediate(Smi::FromInt(array_index)));
       StoreArrayLiteralElementStub stub(isolate());
       __ CallStub(&stub);
     }
-
     PrepareForBailoutForId(expr->GetIdForElement(array_index), NO_REGISTERS);
   }