[WIP] Start adding JSCallWithVarargs

src/compiler/js-call-reducer.h

 // 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.
 
 #ifndef V8_COMPILER_JS_CALL_REDUCER_H_
 #define V8_COMPILER_JS_CALL_REDUCER_H_
 
 #include "src/base/flags.h"
 #include "src/compiler/graph-reducer.h"
 
@@ skipping 20 matching lines @@
   JSCallReducer(Editor* editor, JSGraph* jsgraph,
                 Handle<Context> native_context,
                 CompilationDependencies* dependencies)
       : AdvancedReducer(editor),
         jsgraph_(jsgraph),
         native_context_(native_context),
         dependencies_(dependencies) {}
 
   Reduction Reduce(Node* node) final;
 
+  // Processes the waitlist gathered while the reducer was running,
+  // and does a final attempt to reduce the nodes in the waitlist.
+  void Finalize() final;
+
  private:
   Reduction ReduceArrayConstructor(Node* node);
   Reduction ReduceBooleanConstructor(Node* node);
   Reduction ReduceCallApiFunction(
       Node* node, Handle<FunctionTemplateInfo> function_template_info);
   Reduction ReduceNumberConstructor(Node* node);
   Reduction ReduceFunctionPrototypeApply(Node* node);
   Reduction ReduceFunctionPrototypeCall(Node* node);
   Reduction ReduceFunctionPrototypeHasInstance(Node* node);
   Reduction ReduceObjectGetPrototype(Node* node, Node* object);
@@ skipping 21 matching lines @@
   Handle<Context> native_context() const { return native_context_; }
   Handle<JSGlobalProxy> global_proxy() const;
   CommonOperatorBuilder* common() const;
   JSOperatorBuilder* javascript() const;
   SimplifiedOperatorBuilder* simplified() const;
   CompilationDependencies* dependencies() const { return dependencies_; }
 
   JSGraph* const jsgraph_;
   Handle<Context> const native_context_;
   CompilationDependencies* const dependencies_;
+  std::set<Node*> waitlist_;
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_JS_CALL_REDUCER_H_