In-heap small typed arrays

src/elements-kind.h

Index: src/elements-kind.h
diff --git a/src/elements-kind.h b/src/elements-kind.h
index 32108f505cbc203bf23510139f48457c2627d60a..d2605e8b068f80f09a1f60d568fb34225a734073 100644
--- a/src/elements-kind.h
+++ b/src/elements-kind.h
@@ -100,10 +100,10 @@ void PrintElementsKind(FILE* out, ElementsKind kind);
 
 ElementsKind GetInitialFastElementsKind();
 
-ElementsKind GetFastElementsKindFromSequenceIndex(int sequence_index);
-
+ElementsKind GetFastElementsKindFromSequenceIndex(int sequence_number);
 int GetSequenceIndexFromFastElementsKind(ElementsKind elements_kind);
 
+ElementsKind GetNextTransitionElementsKind(ElementsKind elements_kind);
 
 inline bool IsDictionaryElementsKind(ElementsKind kind) {
   return kind == DICTIONARY_ELEMENTS;
@@ -116,6 +116,12 @@ inline bool IsExternalArrayElementsKind(ElementsKind 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;
@@ -128,6 +134,11 @@ inline bool IsFastElementsKind(ElementsKind kind) {
 }
 
 
+inline bool IsTransitionElementsKind(ElementsKind kind) {
+  return IsFastElementsKind(kind) || IsFixedTypedArrayElementsKind(kind);
+}
+
+
 inline bool IsFastDoubleElementsKind(ElementsKind kind) {
   return kind == FAST_DOUBLE_ELEMENTS ||
       kind == FAST_HOLEY_DOUBLE_ELEMENTS;