Optimize various forms of slice.call(arguments, ...)

src/runtime.cc

Index: src/runtime.cc
diff --git a/src/runtime.cc b/src/runtime.cc
index 07987e2e39e271da31ce4b88346de252736167f3..5a7490db78e28a086477ca7ca39e64da41e38514 100644
--- a/src/runtime.cc
+++ b/src/runtime.cc
@@ -5521,6 +5521,18 @@ RUNTIME_FUNCTION(Runtime_SetInlineBuiltinFlag) {
 }
 
 
+RUNTIME_FUNCTION(Runtime_DisableOptimisticOptimizations) {
+  SealHandleScope shs(isolate);
+  RUNTIME_ASSERT(args.length() == 1);
+  CONVERT_ARG_HANDLE_CHECKED(Object, object, 0);
+
+  if (object->IsSharedFunctionInfo()) {
+    SharedFunctionInfo::cast(*object)->disable_optimistic_optimizations();
+  }
+  return isolate->heap()->undefined_value();
+}
+
+
 RUNTIME_FUNCTION(Runtime_StoreArrayLiteralElement) {
   HandleScope scope(isolate);
   RUNTIME_ASSERT(args.length() == 5);