[turbofan] Change RawMachineAssembler to take a CallDescriptor instead of a MachineSignature.

src/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/raw-machine-assembler.h"
 #include "src/compiler/scheduler.h"
 
 namespace v8 {
 namespace internal {
 namespace compiler {
 
 RawMachineAssembler::RawMachineAssembler(Isolate* isolate, Graph* graph,
-                                         const MachineSignature* machine_sig,
+                                         CallDescriptor* call_descriptor,
                                          MachineType word,
                                          MachineOperatorBuilder::Flags flags)
     : GraphBuilder(isolate, graph),
       schedule_(new (zone()) Schedule(zone())),
       machine_(zone(), word, flags),
       common_(zone()),
-      machine_sig_(machine_sig),
-      call_descriptor_(
-          Linkage::GetSimplifiedCDescriptor(graph->zone(), machine_sig)),
+      call_descriptor_(call_descriptor),
       parameters_(NULL),
       current_block_(schedule()->start()) {
   int param_count = static_cast<int>(parameter_count());
   Node* s = graph->NewNode(common_.Start(param_count));
   graph->SetStart(s);
   if (parameter_count() == 0) return;
   parameters_ = zone()->NewArray<Node*>(param_count);
   for (size_t i = 0; i < parameter_count(); ++i) {
     parameters_[i] =
         NewNode(common()->Parameter(static_cast<int>(i)), graph->start());
@@ skipping 216 matching lines @@
                                                            : CurrentBlock();
   if (op->opcode() != IrOpcode::kReturn) {
     schedule()->AddNode(block, node);
   }
   return node;
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8