Version 3.25.28.4

src/elements-kind.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 154 matching lines @@
     elements_kind = GetNextTransitionElementsKind(elements_kind);
     if (!IsFastHoleyElementsKind(elements_kind) || !allow_only_packed) {
       return elements_kind;
     }
   }
   UNREACHABLE();
   return TERMINAL_FAST_ELEMENTS_KIND;
 }
 
 
+static bool IsTypedArrayElementsKind(ElementsKind elements_kind) {
+  return IsFixedTypedArrayElementsKind(elements_kind) ||
+      IsExternalArrayElementsKind(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;
+    }
+  }
   switch (from_kind) {
     case FAST_SMI_ELEMENTS:
       return to_kind != FAST_SMI_ELEMENTS;
     case FAST_HOLEY_SMI_ELEMENTS:
       return to_kind != FAST_SMI_ELEMENTS &&
           to_kind != FAST_HOLEY_SMI_ELEMENTS;
     case FAST_DOUBLE_ELEMENTS:
       return to_kind != FAST_SMI_ELEMENTS &&
           to_kind != FAST_HOLEY_SMI_ELEMENTS &&
           to_kind != FAST_DOUBLE_ELEMENTS;
     case FAST_HOLEY_DOUBLE_ELEMENTS:
       return to_kind == FAST_ELEMENTS ||
           to_kind == FAST_HOLEY_ELEMENTS;
     case FAST_ELEMENTS:
       return to_kind == FAST_HOLEY_ELEMENTS;
     case FAST_HOLEY_ELEMENTS:
       return false;
     default:
       return false;
   }
 }
 
 
 } }  // namespace v8::internal