[Ignition/turbo] Add a NewWithSpread bytecode.

src/interpreter/interpreter.cc

 // Copyright 2015 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/interpreter/interpreter.h"
 
 #include <fstream>
 #include <memory>
 
 #include "src/ast/prettyprinter.h"
@@ skipping 1816 matching lines @@
   Node* native_context = __ LoadNativeContext(context);
   Node* function = __ LoadContextElement(native_context, context_index);
 
   // Call the function.
   Node* result = __ CallJS(function, context, first_arg, args_count,
                            TailCallMode::kDisallow);
   __ SetAccumulator(result);
   __ 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
 // register |first_arg| and |arg_count| arguments in subsequent
 // registers. The new.target is in the accumulator.
 //
 void Interpreter::DoNew(InterpreterAssembler* assembler) {
   Callable ic = CodeFactory::InterpreterPushArgsAndConstruct(isolate_);
   Node* new_target = __ GetAccumulator();
   Node* constructor_reg = __ BytecodeOperandReg(0);
@@ skipping 930 matching lines @@
   __ StoreObjectField(generator, JSGeneratorObject::kContinuationOffset,
       __ SmiTag(new_state));
   __ SetAccumulator(old_state);
 
   __ Dispatch();
 }
 
 }  // namespace interpreter
 }  // namespace internal
 }  // namespace v8