[turbofan] Remove architecture-specific linkage files and LinkageTraits. Use macro-assembler-define…

src/compiler/ppc/linkage-ppc.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 PPCLinkageHelperTraits {
-  static Register ReturnValueReg() { return r3; }
-  static Register ReturnValue2Reg() { return r4; }
-  static Register JSCallFunctionReg() { return r4; }
-  static Register ContextReg() { return cp; }
-  static Register InterpreterBytecodeOffsetReg() {
-    return kInterpreterBytecodeOffsetRegister;
-  }
-  static Register InterpreterBytecodeArrayReg() {
-    return kInterpreterBytecodeArrayRegister;
-  }
-  static Register InterpreterDispatchTableReg() {
-    return kInterpreterDispatchTableRegister;
-  }
-  static Register RuntimeCallFunctionReg() { return r4; }
-  static Register RuntimeCallArgCountReg() { return r3; }
-};
-
-
-typedef LinkageHelper<PPCLinkageHelperTraits> 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::GetInterpreterDispatchDescriptor(Zone* zone) {
-  return LH::GetInterpreterDispatchDescriptor(zone);
-}
-
-}  // namespace compiler
-}  // namespace internal
-}  // namespace v8