Move constructors for [Element/Field]Access into AccessBuilder.

src/compiler/access-builder.h

 // 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.
 
 #ifndef V8_COMPILER_ACCESS_BUILDER_H_
 #define V8_COMPILER_ACCESS_BUILDER_H_
 
 #include "src/compiler/simplified-operator.h"
 
 namespace v8 {
 namespace internal {
 namespace compiler {
 
 // This access builder provides a set of static methods constructing commonly
 // used FieldAccess and ElementAccess descriptors. These descriptors server as
 // parameters to simplified load/store operators.
 class AccessBuilder : public AllStatic {
  public:
+  // Provides access to HeapObject::map() field.
+  static FieldAccess ForMap() {
+    return {kTaggedBase, HeapObject::kMapOffset, Handle<Name>(), Type::Any(),
+            kMachAnyTagged};
+  }
+
+  // Provides access to JSObject::properties() field.
+  static FieldAccess ForJSObjectProperties() {
+    return {kTaggedBase, JSObject::kPropertiesOffset, Handle<Name>(),
+            Type::Any(), kMachAnyTagged};
+  }
+
   // Provides access to JSObject::elements() field.
   static FieldAccess ForJSObjectElements() {
     return {kTaggedBase, JSObject::kElementsOffset, Handle<Name>(),
             Type::Internal(), kMachAnyTagged};
   }
 
+  // Provides access to JSArrayBuffer::backing_store() field.
+  static FieldAccess ForJSArrayBufferBackingStore() {
+    return {kTaggedBase, JSArrayBuffer::kBackingStoreOffset, Handle<Name>(),
+            Type::UntaggedPtr(), kMachPtr};
+  }
+
   // Provides access to ExternalArray::external_pointer() field.
   static FieldAccess ForExternalArrayPointer() {
     return {kTaggedBase, ExternalArray::kExternalPointerOffset, Handle<Name>(),
             Type::UntaggedPtr(), kMachPtr};
   }
 
+  // Provides access to FixedArray elements.
+  static ElementAccess ForFixedArrayElement() {
+    return {kTaggedBase, FixedArray::kHeaderSize, Type::Any(), kMachAnyTagged};
+  }
+
+  // TODO(mstarzinger): Raw access only for testing, drop me.
+  static ElementAccess ForBackingStoreElement(MachineType rep) {
+    return {kUntaggedBase, kNonHeapObjectHeaderSize - kHeapObjectTag,
+            Type::Any(), rep};
+  }
+
   // Provides access to Fixed{type}TypedArray and External{type}Array elements.
   static ElementAccess ForTypedArrayElement(ExternalArrayType type,
                                             bool is_external) {
     BaseTaggedness taggedness = is_external ? kUntaggedBase : kTaggedBase;
     int header_size = is_external ? 0 : FixedTypedArrayBase::kDataOffset;
     switch (type) {
       case kExternalInt8Array:
         return {taggedness, header_size, Type::Signed32(), kMachInt8};
       case kExternalUint8Array:
       case kExternalUint8ClampedArray:
@@ skipping 17 matching lines @@
 
  private:
   DISALLOW_COPY_AND_ASSIGN(AccessBuilder);
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_ACCESS_BUILDER_H_