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Unified Diff: src/runtime/runtime-object.cc

Issue 754863002: Optimize testing for an index's existence in packed Arrays (Closed) Base URL: https://chromium.googlesource.com/v8/v8.git@master
Patch Set: Rebased for landing Created 6 years ago
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Index: src/runtime/runtime-object.cc
diff --git a/src/runtime/runtime-object.cc b/src/runtime/runtime-object.cc
index de4e81248866601bad2a4f25dfdf237330c7a272..f8c2916e8ad2c0708bbafcfe4d8735f274042531 100644
--- a/src/runtime/runtime-object.cc
+++ b/src/runtime/runtime-object.cc
@@ -1524,6 +1524,15 @@ RUNTIME_FUNCTION(Runtime_GetDataProperty) {
}
+RUNTIME_FUNCTION(Runtime_HasFastPackedElements) {
+ SealHandleScope shs(isolate);
+ DCHECK(args.length() == 1);
+ CONVERT_ARG_CHECKED(HeapObject, obj, 0);
+ return isolate->heap()->ToBoolean(
+ IsFastPackedElementsKind(obj->map()->elements_kind()));
+}
+
+
RUNTIME_FUNCTION(RuntimeReference_ValueOf) {
SealHandleScope shs(isolate);
DCHECK(args.length() == 1);
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