[turbofan] Factor C call descriptor building into compiler/c-linkage.cc.

src/compiler/x87/linkage-x87.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/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 X87LinkageHelperTraits {
   static Register ReturnValueReg() { return eax; }
   static Register ReturnValue2Reg() { return edx; }
   static Register JSCallFunctionReg() { return edi; }
   static Register ContextReg() { return esi; }
   static Register InterpreterBytecodePointerReg() { return edi; }
   static Register InterpreterDispatchTableReg() { return ebx; }
   static Register RuntimeCallFunctionReg() { return ebx; }
   static Register RuntimeCallArgCountReg() { return eax; }
-  static RegList CCalleeSaveRegisters() {
-    return esi.bit() | edi.bit() | ebx.bit();
-  }
-  static RegList CCalleeSaveFPRegisters() { return 0; }
-  static Register CRegisterParameter(int i) { return no_reg; }
-  static int CRegisterParametersLength() { return 0; }
-  static int CStackBackingStoreLength() { return 0; }
 };
 
 typedef LinkageHelper<X87LinkageHelperTraits> LH;
 
 CallDescriptor* Linkage::GetJSCallDescriptor(Zone* zone, bool is_osr,
                                              int parameter_count,
                                              CallDescriptor::Flags flags) {
   return LH::GetJSCallDescriptor(zone, is_osr, parameter_count, flags);
 }
 
 
 CallDescriptor* Linkage::GetRuntimeCallDescriptor(
     Zone* zone, Runtime::FunctionId function, int parameter_count,
     Operator::Properties properties) {
   return LH::GetRuntimeCallDescriptor(zone, function, parameter_count,
                                       properties);
 }
 
 
 CallDescriptor* Linkage::GetStubCallDescriptor(
     Isolate* isolate, Zone* zone, const CallInterfaceDescriptor& descriptor,
     int stack_parameter_count, CallDescriptor::Flags flags,
     Operator::Properties properties, MachineType return_type) {
   return LH::GetStubCallDescriptor(isolate, zone, descriptor,
                                    stack_parameter_count, flags, properties,
                                    return_type);
 }
 
 
-CallDescriptor* Linkage::GetSimplifiedCDescriptor(Zone* zone,
-                                                  const MachineSignature* sig) {
-  return LH::GetSimplifiedCDescriptor(zone, sig);
-}
-
-
 CallDescriptor* Linkage::GetInterpreterDispatchDescriptor(Zone* zone) {
   return LH::GetInterpreterDispatchDescriptor(zone);
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8