[turbofan] Introduce initial support for TypedArrays.

src/compiler/access-builder.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/compiler/access-builder.h"
 
 #include "src/contexts.h"
 #include "src/frames.h"
 #include "src/handles-inl.h"
 #include "src/heap/heap.h"
@@ skipping 309 matching lines @@
 FieldAccess AccessBuilder::ForFixedArrayLength() {
   FieldAccess access = {kTaggedBase,
                         FixedArray::kLengthOffset,
                         MaybeHandle<Name>(),
                         TypeCache::Get().kFixedArrayLengthType,
                         MachineType::AnyTagged(),
                         kNoWriteBarrier};
   return access;
 }
 
+// static
+FieldAccess AccessBuilder::ForFixedTypedArrayBaseBasePointer() {
+  FieldAccess access = {kTaggedBase,
+                        FixedTypedArrayBase::kBasePointerOffset,
+                        MaybeHandle<Name>(),
+                        Type::Tagged(),
+                        MachineType::AnyTagged(),
+                        kPointerWriteBarrier};
+  return access;
+}
+
+// static
+FieldAccess AccessBuilder::ForFixedTypedArrayBaseExternalPointer() {
+  FieldAccess access = {kTaggedBase,
+                        FixedTypedArrayBase::kExternalPointerOffset,
+                        MaybeHandle<Name>(),
+                        Type::UntaggedPointer(),
+                        MachineType::Pointer(),
+                        kNoWriteBarrier};
+  return access;
+}
 
 // static
 FieldAccess AccessBuilder::ForDescriptorArrayEnumCache() {
   FieldAccess access = {kTaggedBase,
                         DescriptorArray::kEnumCacheOffset,
                         Handle<Name>(),
                         Type::TaggedPointer(),
                         MachineType::AnyTagged(),
                         kPointerWriteBarrier};
   return access;
@@ skipping 311 matching lines @@
   }
   UNREACHABLE();
   ElementAccess access = {kUntaggedBase, 0, Type::None(), MachineType::None(),
                           kNoWriteBarrier};
   return access;
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8