Cherry-pick r234714: [MC] Write padding into fragments when -mc-relax-all flag is used

include/llvm/MC/MCAsmLayout.h

 //===- MCAsmLayout.h - Assembly Layout Object -------------------*- C++ -*-===//
 //
 //                     The LLVM Compiler Infrastructure
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 
 #ifndef LLVM_MC_MCASMLAYOUT_H
@@ skipping 32 matching lines @@
   /// lower ordinal will be valid.
   mutable DenseMap<const MCSectionData*, MCFragment*> LastValidFragment;
 
   /// \brief Make sure that the layout for the given fragment is valid, lazily
   /// computing it if necessary.
   void ensureValid(const MCFragment *F) const;
 
   /// \brief Is the layout for this fragment valid?
   bool isFragmentValid(const MCFragment *F) const;
 
-  /// \brief Compute the amount of padding required before this fragment to
-  /// obey bundling restrictions.
-  uint64_t computeBundlePadding(const MCFragment *F,
-                                uint64_t FOffset, uint64_t FSize);
-
 public:
   MCAsmLayout(MCAssembler &_Assembler);
 
   /// Get the assembler object this is a layout for.
   MCAssembler &getAssembler() const { return Assembler; }
 
   /// \brief Invalidate the fragments starting with F because it has been
   /// resized. The fragment's size should have already been updated, but
   /// its bundle padding will be recomputed.
   void invalidateFragmentsFrom(MCFragment *F);
@@ skipping 43 matching lines @@
 
   /// \brief If this symbol is equivalent to A + Constant, return A.
   const MCSymbol *getBaseSymbol(const MCSymbol &Symbol) const;
 
   /// @}
 };
 
 } // end namespace llvm
 
 #endif