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

src/compiler/mips/linkage-mips.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 MipsLinkageHelperTraits {
   static Register ReturnValueReg() { return v0; }
   static Register ReturnValue2Reg() { return v1; }
   static Register JSCallFunctionReg() { return a1; }
   static Register ContextReg() { return cp; }
   static Register InterpreterBytecodePointerReg() { return s0; }
   static Register InterpreterDispatchTableReg() { return s1; }
   static Register RuntimeCallFunctionReg() { return a1; }
   static Register RuntimeCallArgCountReg() { return a0; }
-  static RegList CCalleeSaveRegisters() {
-    return s0.bit() | s1.bit() | s2.bit() | s3.bit() | s4.bit() | s5.bit() |
-           s6.bit() | s7.bit();
-  }
-  static RegList CCalleeSaveFPRegisters() {
-    return f20.bit() | f22.bit() | f24.bit() | f26.bit() | f28.bit() |
-           f30.bit();
-  }
-  static Register CRegisterParameter(int i) {
-    static Register register_parameters[] = {a0, a1, a2, a3};
-    return register_parameters[i];
-  }
-  static int CRegisterParametersLength() { return 4; }
-  static int CStackBackingStoreLength() { return 0; }
 };
 
 
 typedef LinkageHelper<MipsLinkageHelperTraits> LH;
 
 CallDescriptor* Linkage::GetJSCallDescriptor(Zone* zone, bool is_osr,
                                              int parameter_count,
                                              CallDescriptor::Flags flags) {
   return LH::GetJSCallDescriptor(zone, is_osr, parameter_count, flags);
 }
@@ skipping 10 matching lines @@
 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