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

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

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #if V8_TARGET_ARCH_IA32
 
 #include "src/code-factory.h"
 #include "src/code-stubs.h"
 #include "src/codegen.h"
 #include "src/debug/debug.h"
@@ skipping 1657 matching lines @@
     context()->PlugTOS();
   } else {
     context()->Plug(eax);
   }
 }
 
 
 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());
 
   AllocationSiteMode allocation_site_mode = TRACK_ALLOCATION_SITE;
   if (has_constant_fast_elements && !FLAG_allocation_site_pretenuring) {
     // If the only customer of allocation sites is transitioning, then
     // we can turn it off if we don't have anywhere else to transition to.
     allocation_site_mode = DONT_TRACK_ALLOCATION_SITE;
   }
@@ skipping 30 matching lines @@
     // is already set in the cloned array.
     if (CompileTimeValue::IsCompileTimeValue(subexpr)) continue;
 
     if (!result_saved) {
       __ push(eax);  // array literal.
       __ push(Immediate(Smi::FromInt(expr->literal_index())));
       result_saved = true;
     }
     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);
       __ mov(ebx, Operand(esp, kPointerSize));  // Copy of array literal.
       __ mov(ebx, FieldOperand(ebx, JSObject::kElementsOffset));
       // 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);
   }
 
   // In case the array literal contains spread expressions it has two parts. The
   // first part is  the "static" array which has a literal index is  handled
   // above. The second part is the part after the first spread expression
   // (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
@@ skipping 3393 matching lines @@
             Assembler::target_address_at(call_target_address,
                                          unoptimized_code));
   return OSR_AFTER_STACK_CHECK;
 }
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_IA32