Convert Linkage to use MachineSignature.

src/compiler/ia32/linkage-ia32.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/v8.h"
 
 #include "src/assembler.h"
 #include "src/code-stubs.h"
 #include "src/compiler/linkage.h"
 #include "src/compiler/linkage-impl.h"
 #include "src/zone.h"
 
 namespace v8 {
 namespace internal {
 namespace compiler {
 
-struct LinkageHelperTraits {
+struct IA32LinkageHelperTraits {
   static Register ReturnValueReg() { return eax; }
   static Register ReturnValue2Reg() { return edx; }
   static Register JSCallFunctionReg() { return edi; }
   static Register ContextReg() { return esi; }
   static Register RuntimeCallFunctionReg() { return ebx; }
   static Register RuntimeCallArgCountReg() { return eax; }
   static RegList CCalleeSaveRegisters() {
     return esi.bit() | edi.bit() | ebx.bit();
   }
   static Register CRegisterParameter(int i) { return no_reg; }
   static int CRegisterParametersLength() { return 0; }
 };
 
+typedef LinkageHelper<IA32LinkageHelperTraits> LH;
 
 CallDescriptor* Linkage::GetJSCallDescriptor(int parameter_count, Zone* zone) {
-  return LinkageHelper::GetJSCallDescriptor<LinkageHelperTraits>(
-      zone, parameter_count);
+  return LH::GetJSCallDescriptor(zone, parameter_count);
 }
 
 
 CallDescriptor* Linkage::GetRuntimeCallDescriptor(Runtime::FunctionId function,
                                                   int parameter_count,
                                                   Operator::Property properties,
                                                   CallDescriptor::Flags flags,
                                                   Zone* zone) {
-  return LinkageHelper::GetRuntimeCallDescriptor<LinkageHelperTraits>(
-      zone, function, parameter_count, properties, flags);
+  return LH::GetRuntimeCallDescriptor(zone, function, parameter_count,
+                                      properties, flags);
 }
 
 
 CallDescriptor* Linkage::GetStubCallDescriptor(
     CodeStubInterfaceDescriptor* descriptor, int stack_parameter_count,
     CallDescriptor::Flags flags, Zone* zone) {
-  return LinkageHelper::GetStubCallDescriptor<LinkageHelperTraits>(
-      zone, descriptor, stack_parameter_count, flags);
+  return LH::GetStubCallDescriptor(zone, descriptor, stack_parameter_count,
+                                   flags);
 }
 
 
-CallDescriptor* Linkage::GetSimplifiedCDescriptor(
-    Zone* zone, int num_params, MachineType return_type,
-    const MachineType* param_types) {
-  return LinkageHelper::GetSimplifiedCDescriptor<LinkageHelperTraits>(
-      zone, num_params, return_type, param_types);
+CallDescriptor* Linkage::GetSimplifiedCDescriptor(Zone* zone,
+                                                  MachineSignature* sig) {
+  return LH::GetSimplifiedCDescriptor(zone, sig);
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8