Debug info: Refactor EmitDwarfRegOpPiece to be a member function of

AsmPrinter.
No functional change.

http://reviews.llvm.org/D3373
rdar://problem/15928306

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@207369 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/CodeGen/AsmPrinter.h

@@ -430,7 +430,17 @@ namespace llvm {
     /// encoding specified.
     virtual unsigned getISAEncoding() { return 0; }
 
+    /// \brief Emit a partial dwarf register operation.
+    /// \param MLoc             the register
+    /// \param PieceSizeInBits  size and
+    /// \param PieceOffsetBits  offset of the piece in bits, if this is one
+    ///                         piece of an aggregate value.
+    void EmitDwarfRegOpPiece(ByteStreamer &BS, const MachineLocation &MLoc,
+                             unsigned PieceSize,
+                             unsigned PieceOffset) const;
+
     /// EmitDwarfRegOp - Emit dwarf register operation.
+    /// \param Indirect   whether this is a register-indirect address
     virtual void EmitDwarfRegOp(ByteStreamer &BS, const MachineLocation &MLoc,
                                 bool Indirect) const;