[Interpreter] Support for operator new.

src/interpreter/bytecode-generator.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/bytecode-generator.h"
 
 #include <stack>
 
 #include "src/compiler.h"
 #include "src/interpreter/control-flow-builders.h"
@@ skipping 696 matching lines @@
     DCHECK(arg.index() - i == receiver.index() + 1);
     builder()->StoreAccumulatorInRegister(arg);
   }
 
   // TODO(rmcilroy): Deal with possible direct eval here?
   // TODO(rmcilroy): Use CallIC to allow call type feedback.
   builder()->Call(callee, receiver, args->length());
 }
 
 
-void BytecodeGenerator::VisitCallNew(CallNew* expr) { UNIMPLEMENTED(); }
+void BytecodeGenerator::VisitCallNew(CallNew* expr) {
+  TemporaryRegisterScope temporary_register_scope(builder());
+  Register constructor = temporary_register_scope.NewRegister();
+  Visit(expr->expression());
+  builder()->StoreAccumulatorInRegister(constructor);
+
+  ZoneList<Expression*>* args = expr->arguments();
+  if (args->length() > 0) {
+    Register first_arg = temporary_register_scope.NewRegister();
+
+    for (int i = 0; i < args->length(); ++i) {
+      Visit(args->at(i));
+      Register arg =
+          (i == 0) ? first_arg : temporary_register_scope.NewRegister();
+      DCHECK_EQ(arg.index() - i, first_arg.index());
+      builder()->StoreAccumulatorInRegister(arg);
+    }

[rmcilroy, 2015/10/13 14:07:30]

nit - would it be possible to pull out this code into a VisitArgs helper (shared
by CallJS and CallRuntime)? This might be easier with the
VisitForRegister/Accumulator changes so fine to do this in a later CL if it's
tricky.

[oth, 2015/10/14 08:40:09]

Done.

+    builder()->New(constructor, first_arg, args->length());
+  } else {
+    builder()->New(constructor, constructor, 0);
+  }
+}
 
 
 void BytecodeGenerator::VisitCallRuntime(CallRuntime* expr) {
   if (expr->is_jsruntime()) {
     UNIMPLEMENTED();
   }
 
   // Evaluate all arguments to the runtime call.
   ZoneList<Expression*>* args = expr->arguments();
   TemporaryRegisterScope temporary_register_scope(&builder_);
@@ skipping 139 matching lines @@
 int BytecodeGenerator::feedback_index(FeedbackVectorSlot slot) const {
   return info()->feedback_vector()->GetIndex(slot);
 }
 
 
 Register BytecodeGenerator::current_context() const { return current_context_; }
 
 }  // namespace interpreter
 }  // namespace internal
 }  // namespace v8