[Ignition/turbo] Add a NewWithSpread bytecode.

src/interpreter/interpreter.cc

Index: src/interpreter/interpreter.cc
diff --git a/src/interpreter/interpreter.cc b/src/interpreter/interpreter.cc
index 3cb06320ec4ccb93c3693c5f5e49d5936e9bf48b..5b123f69b9b499b4a7d00f2a8c91a9ac5b86bf6f 100644
--- a/src/interpreter/interpreter.cc
+++ b/src/interpreter/interpreter.cc
@@ -1834,6 +1834,26 @@ void Interpreter::DoCallJSRuntime(InterpreterAssembler* assembler) {
   __ Dispatch();
 }
 
+// NewWithSpread <first_arg> <arg_count>
+//
+// Call the constructor in |first_arg| with the new.target in |first_arg + 1|
+// for the |arg_count - 2| following arguments. The final argument is always a
+// spread.
+//
+void Interpreter::DoNewWithSpread(InterpreterAssembler* assembler) {
+  Node* first_arg_reg = __ BytecodeOperandReg(0);
+  Node* first_arg = __ RegisterLocation(first_arg_reg);
+  Node* args_count = __ BytecodeOperandCount(1);
+  Node* context = __ GetContext();
+
+  // Call into Runtime function NewWithSpread which does everything.
+  Node* runtime_function = __ Int32Constant(Runtime::kNewWithSpread);
+  Node* result =
+      __ CallRuntimeN(runtime_function, context, first_arg, args_count);
+  __ SetAccumulator(result);
+  __ Dispatch();
+}
+
 // New <constructor> <first_arg> <arg_count>
 //
 // Call operator new with |constructor| and the first argument in