[turbofan] Add basic support for calling to (a subset of) C functions.

test/unittests/compiler/raw-machine-assembler.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_RAW_MACHINE_ASSEMBLER_H_
 #define V8_COMPILER_RAW_MACHINE_ASSEMBLER_H_
 
 #include "src/compiler/common-operator.h"
 #include "src/compiler/graph-builder.h"
 #include "src/compiler/linkage.h"
@@ skipping 453 matching lines @@
               Label** case_labels, size_t case_count);
   // Call through CallFunctionStub with lazy deopt and frame-state.
   Node* CallFunctionStub0(Node* function, Node* receiver, Node* context,
                           Node* frame_state, CallFunctionFlags flags);
   // Call to a JS function with zero parameters.
   Node* CallJS0(Node* function, Node* receiver, Node* context,
                 Node* frame_state);
   // Call to a runtime function with zero parameters.
   Node* CallRuntime1(Runtime::FunctionId function, Node* arg0, Node* context,
                      Node* frame_state);
+  // Call to a C function with zero parameters.
+  Node* CallCFunction0(MachineType return_type, Node* function);
+  // Call to a C function with one parameter.
+  Node* CallCFunction1(MachineType return_type, MachineType arg0_type,
+                       Node* function, Node* arg0);
+  // Call to a C function with two parameters.
+  Node* CallCFunction2(MachineType return_type, MachineType arg0_type,
+                       MachineType arg1_type, Node* function, Node* arg0,
+                       Node* arg1);
   void Return(Node* value);
   void Bind(Label* label);
   void Deoptimize(Node* state);
 
   // Variables.
   Node* Phi(MachineType type, Node* n1, Node* n2) {
     return NewNode(common()->Phi(type, 2), n1, n2);
   }
   Node* Phi(MachineType type, Node* n1, Node* n2, Node* n3) {
     return NewNode(common()->Phi(type, 3), n1, n2, n3);
@@ skipping 30 matching lines @@
   BasicBlock* current_block_;
 
   DISALLOW_COPY_AND_ASSIGN(RawMachineAssembler);
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_RAW_MACHINE_ASSEMBLER_H_