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

src/elements-kind.h

Index: src/elements-kind.h
diff --git a/src/elements-kind.h b/src/elements-kind.h
index c3184b93835313d30efc4f12051ceec49b47053e..0254a4fb59b20e44096138e54458840ba5253d26 100644
--- a/src/elements-kind.h
+++ b/src/elements-kind.h
@@ -33,17 +33,6 @@ enum ElementsKind {
   FAST_SLOPPY_ARGUMENTS_ELEMENTS,
   SLOW_SLOPPY_ARGUMENTS_ELEMENTS,
 
-  // The "fast" kind for external arrays
-  EXTERNAL_INT8_ELEMENTS,
-  EXTERNAL_UINT8_ELEMENTS,
-  EXTERNAL_INT16_ELEMENTS,
-  EXTERNAL_UINT16_ELEMENTS,
-  EXTERNAL_INT32_ELEMENTS,
-  EXTERNAL_UINT32_ELEMENTS,
-  EXTERNAL_FLOAT32_ELEMENTS,
-  EXTERNAL_FLOAT64_ELEMENTS,
-  EXTERNAL_UINT8_CLAMPED_ELEMENTS,
-
   // Fixed typed arrays
   UINT8_ELEMENTS,
   INT8_ELEMENTS,
@@ -60,8 +49,6 @@ enum ElementsKind {
   LAST_ELEMENTS_KIND = UINT8_CLAMPED_ELEMENTS,
   FIRST_FAST_ELEMENTS_KIND = FAST_SMI_ELEMENTS,
   LAST_FAST_ELEMENTS_KIND = FAST_HOLEY_DOUBLE_ELEMENTS,
-  FIRST_EXTERNAL_ARRAY_ELEMENTS_KIND = EXTERNAL_INT8_ELEMENTS,
-  LAST_EXTERNAL_ARRAY_ELEMENTS_KIND = EXTERNAL_UINT8_CLAMPED_ELEMENTS,
   FIRST_FIXED_TYPED_ARRAY_ELEMENTS_KIND = UINT8_ELEMENTS,
   LAST_FIXED_TYPED_ARRAY_ELEMENTS_KIND = UINT8_CLAMPED_ELEMENTS,
   TERMINAL_FAST_ELEMENTS_KIND = FAST_HOLEY_ELEMENTS
@@ -97,21 +84,15 @@ inline bool IsSloppyArgumentsElements(ElementsKind kind) {
 }
 
 
-inline bool IsExternalArrayElementsKind(ElementsKind kind) {
-  return kind >= FIRST_EXTERNAL_ARRAY_ELEMENTS_KIND &&
-      kind <= LAST_EXTERNAL_ARRAY_ELEMENTS_KIND;
+inline bool IsFixedTypedArrayElementsKind(ElementsKind kind) {
+  return kind >= FIRST_FIXED_TYPED_ARRAY_ELEMENTS_KIND &&
+         kind <= LAST_FIXED_TYPED_ARRAY_ELEMENTS_KIND;
 }
 
 
 inline bool IsTerminalElementsKind(ElementsKind kind) {
   return kind == TERMINAL_FAST_ELEMENTS_KIND ||
-      IsExternalArrayElementsKind(kind);
-}
-
-
-inline bool IsFixedTypedArrayElementsKind(ElementsKind kind) {
-  return kind >= FIRST_FIXED_TYPED_ARRAY_ELEMENTS_KIND &&
-      kind <= LAST_FIXED_TYPED_ARRAY_ELEMENTS_KIND;
+         IsFixedTypedArrayElementsKind(kind);
 }
 
 
@@ -133,21 +114,13 @@ inline bool IsFastDoubleElementsKind(ElementsKind kind) {
 }
 
 
-inline bool IsExternalFloatOrDoubleElementsKind(ElementsKind kind) {
-  return kind == EXTERNAL_FLOAT64_ELEMENTS ||
-      kind == EXTERNAL_FLOAT32_ELEMENTS;
-}
-
-
 inline bool IsFixedFloatElementsKind(ElementsKind kind) {
   return kind == FLOAT32_ELEMENTS || kind == FLOAT64_ELEMENTS;
 }
 
 
 inline bool IsDoubleOrFloatElementsKind(ElementsKind kind) {
-  return IsFastDoubleElementsKind(kind) ||
-      IsExternalFloatOrDoubleElementsKind(kind) ||
-      IsFixedFloatElementsKind(kind);
+  return IsFastDoubleElementsKind(kind) || IsFixedFloatElementsKind(kind);
 }