Revert of Remove ExternalArray, derived types, and element kinds

src/x64/lithium-x64.h

 // 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.
 
 #ifndef V8_X64_LITHIUM_X64_H_
 #define V8_X64_LITHIUM_X64_H_
 
 #include "src/hydrogen.h"
 #include "src/lithium.h"
 #include "src/lithium-allocator.h"
@@ skipping 1599 matching lines @@
 };
 
 
 inline static bool ExternalArrayOpRequiresTemp(
     Representation key_representation,
     ElementsKind elements_kind) {
   // Operations that require the key to be divided by two to be converted into
   // an index cannot fold the scale operation into a load and need an extra
   // temp register to do the work.
   return SmiValuesAre31Bits() && key_representation.IsSmi() &&
-         (elements_kind == UINT8_ELEMENTS || elements_kind == INT8_ELEMENTS ||
-          elements_kind == UINT8_CLAMPED_ELEMENTS);
+      (elements_kind == EXTERNAL_INT8_ELEMENTS ||
+       elements_kind == EXTERNAL_UINT8_ELEMENTS ||
+       elements_kind == EXTERNAL_UINT8_CLAMPED_ELEMENTS ||
+       elements_kind == UINT8_ELEMENTS ||
+       elements_kind == INT8_ELEMENTS ||
+       elements_kind == UINT8_CLAMPED_ELEMENTS);
 }
 
 
 class LLoadKeyed final : public LTemplateInstruction<1, 2, 0> {
  public:
   LLoadKeyed(LOperand* elements, LOperand* key) {
     inputs_[0] = elements;
     inputs_[1] = key;
   }
 
   DECLARE_CONCRETE_INSTRUCTION(LoadKeyed, "load-keyed")
   DECLARE_HYDROGEN_ACCESSOR(LoadKeyed)
 
+  bool is_external() const {
+    return hydrogen()->is_external();
+  }
   bool is_fixed_typed_array() const {
     return hydrogen()->is_fixed_typed_array();
   }
+  bool is_typed_elements() const {
+    return is_external() || is_fixed_typed_array();
+  }
   LOperand* elements() { return inputs_[0]; }
   LOperand* key() { return inputs_[1]; }
   void PrintDataTo(StringStream* stream) override;
   uint32_t base_offset() const { return hydrogen()->base_offset(); }
   ElementsKind elements_kind() const {
     return hydrogen()->elements_kind();
   }
 };
 
 
@@ skipping 570 matching lines @@
 
 
 class LStoreKeyed final : public LTemplateInstruction<0, 3, 0> {
  public:
   LStoreKeyed(LOperand* object, LOperand* key, LOperand* value) {
     inputs_[0] = object;
     inputs_[1] = key;
     inputs_[2] = value;
   }
 
+  bool is_external() const { return hydrogen()->is_external(); }
   bool is_fixed_typed_array() const {
     return hydrogen()->is_fixed_typed_array();
   }
+  bool is_typed_elements() const {
+    return is_external() || is_fixed_typed_array();
+  }
   LOperand* elements() { return inputs_[0]; }
   LOperand* key() { return inputs_[1]; }
   LOperand* value() { return inputs_[2]; }
   ElementsKind elements_kind() const { return hydrogen()->elements_kind(); }
 
   DECLARE_CONCRETE_INSTRUCTION(StoreKeyed, "store-keyed")
   DECLARE_HYDROGEN_ACCESSOR(StoreKeyed)
 
   void PrintDataTo(StringStream* stream) override;
   bool NeedsCanonicalization() { return hydrogen()->NeedsCanonicalization(); }
@@ skipping 660 matching lines @@
 
   DISALLOW_COPY_AND_ASSIGN(LChunkBuilder);
 };
 
 #undef DECLARE_HYDROGEN_ACCESSOR
 #undef DECLARE_CONCRETE_INSTRUCTION
 
 } }  // namespace v8::int
 
 #endif  // V8_X64_LITHIUM_X64_H_