Revert of [regexp] Remove remainder of native RegExpExecStub

src/regexp/ppc/regexp-macro-assembler-ppc.h

 // 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.
 
 #ifndef V8_REGEXP_PPC_REGEXP_MACRO_ASSEMBLER_PPC_H_
 #define V8_REGEXP_PPC_REGEXP_MACRO_ASSEMBLER_PPC_H_
 
 #include "src/macro-assembler.h"
 #include "src/ppc/assembler-ppc.h"
 #include "src/ppc/frames-ppc.h"
@@ skipping 78 matching lines @@
   // Offsets from frame_pointer() of function parameters and stored registers.
   static const int kFramePointer = 0;
 
   // Above the frame pointer - Stored registers and stack passed parameters.
   // Register 25..31.
   static const int kStoredRegisters = kFramePointer;
   // Return address (stored from link register, read into pc on return).
   static const int kReturnAddress = kStoredRegisters + 7 * kPointerSize;
   static const int kCallerFrame = kReturnAddress + kPointerSize;
   // Stack parameters placed by caller.
-  static const int kIsolate =
+  static const int kSecondaryReturnAddress =
       kCallerFrame + kStackFrameExtraParamSlot * kPointerSize;
+  static const int kIsolate = kSecondaryReturnAddress + kPointerSize;
 
   // Below the frame pointer.
   // Register parameters stored by setup code.
   static const int kDirectCall = kFramePointer - kPointerSize;
   static const int kStackHighEnd = kDirectCall - kPointerSize;
   static const int kNumOutputRegisters = kStackHighEnd - kPointerSize;
   static const int kRegisterOutput = kNumOutputRegisters - kPointerSize;
   static const int kInputEnd = kRegisterOutput - kPointerSize;
   static const int kInputStart = kInputEnd - kPointerSize;
   static const int kStartIndex = kInputStart - kPointerSize;
@@ skipping 94 matching lines @@
 
 // Set of non-volatile registers saved/restored by generated regexp code.
 const RegList kRegExpCalleeSaved =
     1 << 25 | 1 << 26 | 1 << 27 | 1 << 28 | 1 << 29 | 1 << 30 | 1 << 31;
 
 #endif  // V8_INTERPRETED_REGEXP
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_REGEXP_PPC_REGEXP_MACRO_ASSEMBLER_PPC_H_