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

test/unittests/compiler/raw-machine-assembler.cc

 // 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.
 
 #include "src/code-factory.h"
 #include "src/compiler/pipeline.h"
 #include "src/compiler/scheduler.h"
 #include "test/unittests/compiler/raw-machine-assembler.h"
 
 namespace v8 {
@@ skipping 126 matching lines @@
       common()->ExternalConstant(ExternalReference(function, isolate())));
   Node* arity = Int32Constant(1);
 
   Node* call = graph()->NewNode(common()->Call(descriptor), centry, arg0, ref,
                                 arity, context, frame_state);
   schedule()->AddNode(CurrentBlock(), call);
   return call;
 }
 
 
+Node* RawMachineAssembler::CallCFunction0(MachineType return_type,
+                                          Node* function) {
+  MachineSignature::Builder builder(zone(), 1, 0);
+  builder.AddReturn(return_type);
+  const CallDescriptor* descriptor =
+      Linkage::GetSimplifiedCDescriptor(zone(), builder.Build());
+
+  Node* call = graph()->NewNode(common()->Call(descriptor), function);
+  schedule()->AddNode(CurrentBlock(), call);
+  return call;
+}
+
+
+Node* RawMachineAssembler::CallCFunction1(MachineType return_type,
+                                          MachineType arg0_type, Node* function,
+                                          Node* arg0) {
+  MachineSignature::Builder builder(zone(), 1, 1);
+  builder.AddReturn(return_type);
+  builder.AddParam(arg0_type);
+  const CallDescriptor* descriptor =
+      Linkage::GetSimplifiedCDescriptor(zone(), builder.Build());
+
+  Node* call = graph()->NewNode(common()->Call(descriptor), function, arg0);
+  schedule()->AddNode(CurrentBlock(), call);
+  return call;
+}
+
+
+Node* RawMachineAssembler::CallCFunction2(MachineType return_type,
+                                          MachineType arg0_type,
+                                          MachineType arg1_type, Node* function,
+                                          Node* arg0, Node* arg1) {
+  MachineSignature::Builder builder(zone(), 1, 2);
+  builder.AddReturn(return_type);
+  builder.AddParam(arg0_type);
+  builder.AddParam(arg1_type);
+  const CallDescriptor* descriptor =
+      Linkage::GetSimplifiedCDescriptor(zone(), builder.Build());
+
+  Node* call =
+      graph()->NewNode(common()->Call(descriptor), function, arg0, arg1);
+  schedule()->AddNode(CurrentBlock(), call);
+  return call;
+}
+
+
 void RawMachineAssembler::Bind(Label* label) {
   DCHECK(current_block_ == NULL);
   DCHECK(!label->bound_);
   label->bound_ = true;
   current_block_ = EnsureBlock(label);
 }
 
 
 BasicBlock* RawMachineAssembler::Use(Label* label) {
   label->used_ = true;
@@ skipping 22 matching lines @@
                                                            : CurrentBlock();
   if (op->opcode() != IrOpcode::kReturn) {
     schedule()->AddNode(block, node);
   }
   return node;
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8