[Interpreter] Add support for calling runtime functions which return a pair.

src/compiler/bytecode-graph-builder.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/compiler/bytecode-graph-builder.h"
 
 #include "src/compiler/bytecode-branch-analysis.h"
 #include "src/compiler/linkage.h"
 #include "src/compiler/operator-properties.h"
 #include "src/interpreter/bytecodes.h"
@@ skipping 1181 matching lines @@
   interpreter::Register first_arg = iterator.GetRegisterOperand(1);
   size_t arg_count = iterator.GetCountOperand(2);
 
   // Create node to perform the runtime call.
   const Operator* call = javascript()->CallRuntime(functionId, arg_count);
   Node* value = ProcessCallRuntimeArguments(call, first_arg, arg_count);
   environment()->BindAccumulator(value, &states);
 }
 
 
+void BytecodeGraphBuilder::VisitCallRuntimeForPair(
+    const interpreter::BytecodeArrayIterator& iterator) {
+  UNIMPLEMENTED();
+}
+
+
 Node* BytecodeGraphBuilder::ProcessCallNewArguments(
     const Operator* call_new_op, interpreter::Register callee,
     interpreter::Register first_arg, size_t arity) {
   Node** all = info()->zone()->NewArray<Node*>(arity);
   all[0] = environment()->LookupRegister(callee);
   int first_arg_index = first_arg.index();
   for (int i = 1; i < static_cast<int>(arity) - 1; ++i) {
     all[i] = environment()->LookupRegister(
         interpreter::Register(first_arg_index + i - 1));
   }
@@ skipping 725 matching lines @@
 
 void BytecodeGraphBuilder::UpdateControlDependencyToLeaveFunction(Node* exit) {
   if (environment()->IsMarkedAsUnreachable()) return;
   environment()->MarkAsUnreachable();
   exit_controls_.push_back(exit);
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8