[Turbofan]: Use new MachineTypes in access-builder.

src/compiler/arm/instruction-selector-arm.cc

 // Copyright 2014 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.
 
 #include "src/base/adapters.h"
 #include "src/base/bits.h"
 #include "src/compiler/instruction-selector-impl.h"
 #include "src/compiler/node-matchers.h"
 #include "src/compiler/node-properties.h"
 
@@ skipping 413 matching lines @@
   ArmOperandGenerator g(this);
   Node* base = node->InputAt(0);
   Node* index = node->InputAt(1);
   Node* value = node->InputAt(2);
 
   StoreRepresentation store_rep = StoreRepresentationOf(node->op());
   WriteBarrierKind write_barrier_kind = store_rep.write_barrier_kind();
   MachineRepresentation rep = store_rep.representation();
 
   if (write_barrier_kind != kNoWriteBarrier) {
-    DCHECK_EQ(MachineRepresentation::kTagged, rep);
+    DCHECK(rep == MachineRepresentation::kTagged ||
+           rep == MachineRepresentation::kTaggedPointer);

[Jarin, 2016/08/25 05:52:05]

Could you introduce some helper function in machine-type.h that encapsulates
this?

[mvstanton, 2016/08/29 12:02:10]

CanBeTaggedPointer(rep).

     AddressingMode addressing_mode;
     InstructionOperand inputs[3];
     size_t input_count = 0;
     inputs[input_count++] = g.UseUniqueRegister(base);
     // OutOfLineRecordWrite uses the index in an 'add' instruction as well as
     // for the store itself, so we must check compatibility with both.
     if (g.CanBeImmediate(index, kArmAdd) && g.CanBeImmediate(index, kArmStr)) {
       inputs[input_count++] = g.UseImmediate(index);
       addressing_mode = kMode_Offset_RI;
     } else {
@@ skipping 1813 matching lines @@
   Vector<MachineType> req_aligned = Vector<MachineType>::New(2);
   req_aligned[0] = MachineType::Float32();
   req_aligned[1] = MachineType::Float64();
   return MachineOperatorBuilder::AlignmentRequirements::
       SomeUnalignedAccessUnsupported(req_aligned, req_aligned);
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8