Convert Linkage to use MachineSignature.

src/compiler/common-operator.h

 // Copyright 2013 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_COMMON_OPERATOR_H_
 #define V8_COMPILER_COMMON_OPERATOR_H_
 
 #include "src/v8.h"
 
 #include "src/assembler.h"
@@ skipping 15 matching lines @@
                   int outputs, int controls, const char* mnemonic)
       : Operator1<int>(opcode, properties, inputs, outputs, mnemonic,
                        controls) {}
 
   virtual OStream& PrintParameter(OStream& os) const { return os; }  // NOLINT
   int ControlInputCount() const { return parameter(); }
 };
 
 class CallOperator : public Operator1<CallDescriptor*> {
  public:
+  // TODO(titzer): Operator still uses int, whereas CallDescriptor uses size_t.
   CallOperator(CallDescriptor* descriptor, const char* mnemonic)
       : Operator1<CallDescriptor*>(
             IrOpcode::kCall, descriptor->properties(),
-            descriptor->InputCount() + descriptor->FrameStateCount(),
-            descriptor->ReturnCount(), mnemonic, descriptor) {}
+            static_cast<int>(descriptor->InputCount() +
+                             descriptor->FrameStateCount()),
+            static_cast<int>(descriptor->ReturnCount()), mnemonic, descriptor) {
+  }
 
   virtual OStream& PrintParameter(OStream& os) const {  // NOLINT
     return os << "[" << *parameter() << "]";
   }
 };
 
 // Flag that describes how to combine the current environment with
 // the output of a node to obtain a framestate for lazy bailout.
 enum OutputFrameStateCombine {
   kPushOutput,   // Push the output on the expression stack.
@@ skipping 255 matching lines @@
 
 template <typename T>
 inline T ValueOf(Operator* op) {
   return CommonOperatorTraits<T>::ValueOf(op);
 }
 }
 }
 }  // namespace v8::internal::compiler
 
 #endif  // V8_COMPILER_COMMON_OPERATOR_H_