1 files changed, 9 insertions, 0 deletions
diff --git a/deps/v8/src/interpreter/bytecode-register.cc b/deps/v8/src/interpreter/bytecode-register.cc
index e8eb347f16..5266f693d2 100644
--- a/deps/v8/src/interpreter/bytecode-register.cc
+++ b/deps/v8/src/interpreter/bytecode-register.cc
@@ -32,6 +32,10 @@ static const int kCallerPCOffsetRegisterIndex =
     (InterpreterFrameConstants::kRegisterFileFromFp -
      InterpreterFrameConstants::kCallerPCOffset) /
     kSystemPointerSize;
+static const int kArgumentCountRegisterIndex =
+    (InterpreterFrameConstants::kRegisterFileFromFp -
+     InterpreterFrameConstants::kArgCOffset) /
+    kSystemPointerSize;
 
 Register Register::FromParameterIndex(int index, int parameter_count) {
   DCHECK_GE(index, 0);
@@ -83,6 +87,11 @@ Register Register::virtual_accumulator() {
   return Register(kCallerPCOffsetRegisterIndex);
 }
 
+// static
+Register Register::argument_count() {
+  return Register(kArgumentCountRegisterIndex);
+}
+
 OperandSize Register::SizeOfOperand() const {
   int32_t operand = ToOperand();
   if (operand >= kMinInt8 && operand <= kMaxInt8) {