[Interpreter] Support for operator new.

src/interpreter/bytecode-generator.cc

Index: src/interpreter/bytecode-generator.cc
diff --git a/src/interpreter/bytecode-generator.cc b/src/interpreter/bytecode-generator.cc
index 6fbb46e722bc3c67896e1e2a9d059747d830f4d8..447765fac288c6f12bb03aabee3f56dc58bdc693 100644
--- a/src/interpreter/bytecode-generator.cc
+++ b/src/interpreter/bytecode-generator.cc
@@ -714,7 +714,28 @@ void BytecodeGenerator::VisitCall(Call* expr) {
 }
 
 
-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) {