Reland of "Remove ExternalArray, derived types, and element kinds"

src/elements-kind.cc

Index: src/elements-kind.cc
diff --git a/src/elements-kind.cc b/src/elements-kind.cc
index 07d2837bdc86ca747d1e4468887f6bfa6b049dfd..0d29c3047238cbcfe6b0df71b196441686fa3e48 100644
--- a/src/elements-kind.cc
+++ b/src/elements-kind.cc
@@ -15,26 +15,17 @@ namespace internal {
 
 int ElementsKindToShiftSize(ElementsKind elements_kind) {
   switch (elements_kind) {
-    case EXTERNAL_INT8_ELEMENTS:
-    case EXTERNAL_UINT8_CLAMPED_ELEMENTS:
-    case EXTERNAL_UINT8_ELEMENTS:
     case UINT8_ELEMENTS:
     case INT8_ELEMENTS:
     case UINT8_CLAMPED_ELEMENTS:
       return 0;
-    case EXTERNAL_INT16_ELEMENTS:
-    case EXTERNAL_UINT16_ELEMENTS:
     case UINT16_ELEMENTS:
     case INT16_ELEMENTS:
       return 1;
-    case EXTERNAL_INT32_ELEMENTS:
-    case EXTERNAL_UINT32_ELEMENTS:
-    case EXTERNAL_FLOAT32_ELEMENTS:
     case UINT32_ELEMENTS:
     case INT32_ELEMENTS:
     case FLOAT32_ELEMENTS:
       return 2;
-    case EXTERNAL_FLOAT64_ELEMENTS:
     case FAST_DOUBLE_ELEMENTS:
     case FAST_HOLEY_DOUBLE_ELEMENTS:
     case FLOAT64_ELEMENTS:
@@ -53,16 +44,10 @@ int ElementsKindToShiftSize(ElementsKind elements_kind) {
 }
 
 
-static bool IsTypedArrayElementsKind(ElementsKind elements_kind) {
-  return IsFixedTypedArrayElementsKind(elements_kind) ||
-         IsExternalArrayElementsKind(elements_kind);
-}
-
-
 int GetDefaultHeaderSizeForElementsKind(ElementsKind elements_kind) {
   STATIC_ASSERT(FixedArray::kHeaderSize == FixedDoubleArray::kHeaderSize);
 
-  if (IsTypedArrayElementsKind(elements_kind)) {
+  if (IsFixedTypedArrayElementsKind(elements_kind)) {
     return 0;
   } else {
     return FixedArray::kHeaderSize - kHeapObjectTag;
@@ -125,17 +110,8 @@ int GetSequenceIndexFromFastElementsKind(ElementsKind elements_kind) {
 
 
 ElementsKind GetNextTransitionElementsKind(ElementsKind kind) {
-  switch (kind) {
-#define FIXED_TYPED_ARRAY_CASE(Type, type, TYPE, ctype, size) \
-    case TYPE##_ELEMENTS: return EXTERNAL_##TYPE##_ELEMENTS;
-
-    TYPED_ARRAYS(FIXED_TYPED_ARRAY_CASE)
-#undef FIXED_TYPED_ARRAY_CASE
-    default: {
-      int index = GetSequenceIndexFromFastElementsKind(kind);
-      return GetFastElementsKindFromSequenceIndex(index + 1);
-    }
-  }
+  int index = GetSequenceIndexFromFastElementsKind(kind);
+  return GetFastElementsKindFromSequenceIndex(index + 1);
 }
 
 
@@ -146,18 +122,9 @@ static inline bool IsFastTransitionTarget(ElementsKind elements_kind) {
 
 bool IsMoreGeneralElementsKindTransition(ElementsKind from_kind,
                                          ElementsKind to_kind) {
-  if (IsTypedArrayElementsKind(from_kind) ||
-      IsTypedArrayElementsKind(to_kind)) {
-    switch (from_kind) {
-#define FIXED_TYPED_ARRAY_CASE(Type, type, TYPE, ctype, size) \
-      case TYPE##_ELEMENTS:                                   \
-        return to_kind == EXTERNAL_##TYPE##_ELEMENTS;
-
-      TYPED_ARRAYS(FIXED_TYPED_ARRAY_CASE);
-#undef FIXED_TYPED_ARRAY_CASE
-      default:
-        return false;
-    }
+  if (IsFixedTypedArrayElementsKind(from_kind) ||
+      IsFixedTypedArrayElementsKind(to_kind)) {
+    return false;
   }
   if (IsFastElementsKind(from_kind) && IsFastTransitionTarget(to_kind)) {
     switch (from_kind) {