S390: Fix storing to below stack to avoid sampler handler corrupting stored value

src/s390/macro-assembler-s390.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_S390_MACRO_ASSEMBLER_S390_H_
 #define V8_S390_MACRO_ASSEMBLER_S390_H_
 
 #include "src/assembler.h"
 #include "src/bailout-reason.h"
 #include "src/frames.h"
@@ skipping 195 matching lines @@
   }
 
   void Call(Label* target);
 
   // Register move. May do nothing if the registers are identical.
   void Move(Register dst, Smi* smi) { LoadSmiLiteral(dst, smi); }
   void Move(Register dst, Handle<Object> value);
   void Move(Register dst, Register src, Condition cond = al);
   void Move(DoubleRegister dst, DoubleRegister src);
 
-  void InsertDoubleLow(DoubleRegister dst, Register src);
-  void InsertDoubleHigh(DoubleRegister dst, Register src);
-
   void MultiPush(RegList regs, Register location = sp);
   void MultiPop(RegList regs, Register location = sp);
 
   void MultiPushDoubles(RegList dregs, Register location = sp);
   void MultiPopDoubles(RegList dregs, Register location = sp);
 
   // Load an object from the root table.
   void LoadRoot(Register destination, Heap::RootListIndex index,
                 Condition cond = al);
   // Store an object to the root table.
@@ skipping 1659 matching lines @@
 #define ACCESS_MASM(masm)    \
   masm->stop(__FILE_LINE__); \
   masm->
 #else
 #define ACCESS_MASM(masm) masm->
 #endif
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_S390_MACRO_ASSEMBLER_S390_H_