[turbofan] Add MachineType to LinkageLocation

src/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/assembler.h"
 #include "src/compiler/common-operator.h"
 #include "src/compiler/graph.h"
@@ skipping 744 matching lines @@
     return AddNode(op, sizeof...(args) + 1, buffer);
   }
 
  private:
   Node* MakeNode(const Operator* op, int input_count, Node* const* inputs);
   BasicBlock* Use(RawMachineLabel* label);
   BasicBlock* EnsureBlock(RawMachineLabel* label);
   BasicBlock* CurrentBlock();
 
   Schedule* schedule() { return schedule_; }
-  size_t parameter_count() const { return machine_sig()->parameter_count(); }
-  const MachineSignature* machine_sig() const {
-    return call_descriptor_->GetMachineSignature();
-  }
+  size_t parameter_count() const { return call_descriptor_->ParameterCount(); }
 
   Isolate* isolate_;
   Graph* graph_;
   Schedule* schedule_;
   MachineOperatorBuilder machine_;
   CommonOperatorBuilder common_;
   CallDescriptor* call_descriptor_;
   NodeVector parameters_;
   BasicBlock* current_block_;
 
@@ skipping 16 matching lines @@
   bool deferred_;
   friend class RawMachineAssembler;
   DISALLOW_COPY_AND_ASSIGN(RawMachineLabel);
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_RAW_MACHINE_ASSEMBLER_H_