FFI Compiler based on code stub assembler

src/compiler/code-assembler.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_CODE_ASSEMBLER_H_
 #define V8_COMPILER_CODE_ASSEMBLER_H_
 
 #include <map>
 #include <memory>
 
@@ skipping 346 matching lines @@
                     TArgs... args) {
     int argc = static_cast<int>(sizeof...(args));
     Node* arity = Int32Constant(argc);
     Node* receiver = LoadRoot(Heap::kUndefinedValueRootIndex);
 
     // Construct(target, new_target, arity, receiver, arguments...)
     return CallStub(callable, context, new_target, new_target, arity, receiver,
                     args...);
   }
 
+  Node* CallCFunctionN(CallDescriptor* descriptor, int input_count,

[Michael Starzinger, 2017/01/16 12:10:11]

The {compiler::CallDescriptor} struct is not available outside of the compiler
component. The {CodeAssembler} however represents an API for other components,
so we shouldn't make it part of the interface.

+                       Node* const* inputs);
+
   // Call to a C function with two arguments.
   Node* CallCFunction2(MachineType return_type, MachineType arg0_type,
                        MachineType arg1_type, Node* function, Node* arg0,
                        Node* arg1);
 
   // Call to a C function with three arguments.
   Node* CallCFunction3(MachineType return_type, MachineType arg0_type,
                        MachineType arg1_type, MachineType arg2_type,
                        Node* function, Node* arg0, Node* arg1, Node* arg2);
 
@@ skipping 124 matching lines @@
   CodeAssemblerCallback call_epilogue_;
 
   DISALLOW_COPY_AND_ASSIGN(CodeAssemblerState);
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_CODE_ASSEMBLER_H_