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

src/full-codegen/arm/full-codegen-arm.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_ARM
 
 #include "src/code-factory.h"
 #include "src/code-stubs.h"
 #include "src/codegen.h"
 #include "src/debug/debug.h"
@@ skipping 1735 matching lines @@
     context()->PlugTOS();
   } else {
     context()->Plug(r0);
   }
 }
 
 
 void FullCodeGenerator::VisitArrayLiteral(ArrayLiteral* expr) {
   Comment cmnt(masm_, "[ ArrayLiteral");
 
   expr->BuildConstantElements(isolate());

[Michael Starzinger, 2015/10/13 11:59:18]

This shouldn't be needed anymore, since the numbering-phase takes care of it,
correct? If so, then this applies to all architecture ports.

[mvstanton, 2015/10/13 12:56:10]

Done.

 
   Handle<FixedArray> constant_elements = expr->constant_elements();
   bool has_fast_elements =
       IsFastObjectElementsKind(expr->constant_elements_kind());
   Handle<FixedArrayBase> constant_elements_values(
       FixedArrayBase::cast(constant_elements->get(1)));
 
   AllocationSiteMode allocation_site_mode = TRACK_ALLOCATION_SITE;
   if (has_fast_elements && !FLAG_allocation_site_pretenuring) {
     // If the only customer of allocation sites is transitioning, then
@@ skipping 30 matching lines @@
     // is already set in the cloned array.
     if (CompileTimeValue::IsCompileTimeValue(subexpr)) continue;
 
     if (!result_saved) {
       __ push(r0);
       __ Push(Smi::FromInt(expr->literal_index()));
       result_saved = true;
     }
     VisitForAccumulatorValue(subexpr);
 
-    if (has_fast_elements) {
+    if (FLAG_vector_stores) {
+      __ mov(StoreDescriptor::NameRegister(),
+             Operand(Smi::FromInt(array_index)));
+      __ ldr(StoreDescriptor::ReceiverRegister(), MemOperand(sp, kPointerSize));
+      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);
       __ ldr(r6, MemOperand(sp, kPointerSize));  // Copy of array literal.
       __ ldr(r1, FieldMemOperand(r6, JSObject::kElementsOffset));
       __ str(result_register(), FieldMemOperand(r1, offset));
       // Update the write barrier for the array store.
       __ RecordWriteField(r1, offset, result_register(), r2,
                           kLRHasBeenSaved, kDontSaveFPRegs,
                           EMIT_REMEMBERED_SET, INLINE_SMI_CHECK);
     } else {
       __ mov(r3, Operand(Smi::FromInt(array_index)));
@@ skipping 3462 matching lines @@
   DCHECK(interrupt_address ==
          isolate->builtins()->OsrAfterStackCheck()->entry());
   return OSR_AFTER_STACK_CHECK;
 }
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_ARM