Teach TurboFan to call C functions with result_size > 1.

src/compiler/js-graph.h

 // Copyright 2014 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.
 
 #ifndef V8_COMPILER_JS_GRAPH_H_
 #define V8_COMPILER_JS_GRAPH_H_
 
 #include "src/compiler/common-node-cache.h"
 #include "src/compiler/common-operator.h"
 #include "src/compiler/graph.h"
@@ skipping 14 matching lines @@
  public:
   JSGraph(Graph* graph, CommonOperatorBuilder* common,
           JSOperatorBuilder* javascript, MachineOperatorBuilder* machine)
       : graph_(graph),
         common_(common),
         javascript_(javascript),
         machine_(machine),
         cache_(zone()) {}
 
   // Canonicalized global constants.
-  Node* CEntryStubConstant();
+  Node* CEntryStubConstant(int result_size);
   Node* UndefinedConstant();
   Node* TheHoleConstant();
   Node* TrueConstant();
   Node* FalseConstant();
   Node* NullConstant();
   Node* ZeroConstant();
   Node* OneConstant();
   Node* NaNConstant();
 
   // Creates a HeapConstant node, possibly canonicalized, without inspecting the
@@ skipping 89 matching lines @@
   Factory* factory() { return isolate()->factory(); }
 
   DISALLOW_COPY_AND_ASSIGN(JSGraph);
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif