PPC: [stubs] Refactor StringCompareStub and use it for HStringCompareAndBranch.

src/ppc/interface-descriptors-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.
 
 #if V8_TARGET_ARCH_PPC
 
 #include "src/interface-descriptors.h"
 
 namespace v8 {
 namespace internal {
@@ skipping 32 matching lines @@
 
 
 const Register StoreGlobalViaContextDescriptor::SlotRegister() { return r5; }
 const Register StoreGlobalViaContextDescriptor::ValueRegister() { return r3; }
 
 
 const Register InstanceOfDescriptor::LeftRegister() { return r4; }
 const Register InstanceOfDescriptor::RightRegister() { return r3; }
 
 
+const Register StringCompareDescriptor::LeftRegister() { return r4; }
+const Register StringCompareDescriptor::RightRegister() { return r3; }
+
+
 const Register ArgumentsAccessReadDescriptor::index() { return r4; }
 const Register ArgumentsAccessReadDescriptor::parameter_count() { return r3; }
 
 
 const Register ApiGetterDescriptor::function_address() { return r5; }
 
 
 const Register MathPowTaggedDescriptor::exponent() { return r5; }
 
 
@@ skipping 325 matching lines @@
       r3,  // argument count (including receiver)
       r5,  // address of first argument
       r4   // the target callable to be call
   };
   data->InitializePlatformSpecific(arraysize(registers), registers);
 }
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_PPC