Revert "DIBuilder: Remove dead code"

This reverts commit r218820.  It turns out that Adrian has an
outstanding SROA patch that uses this.

I've updated it to forward to `createExpression()`.

llvm-svn: 218828

1 files changed, 6 insertions, 0 deletions

diff --git a/llvm/lib/IR/DIBuilder.cpp b/llvm/lib/IR/DIBuilder.cpp
index 743886946fc..950c5d237e4 100644
--- a/llvm/lib/IR/DIBuilder.cpp
+++ b/llvm/lib/IR/DIBuilder.cpp
@@ -1056,6 +1056,12 @@ DIExpression DIBuilder::createExpression(ArrayRef<int64_t> Addr) {
   return DIExpression(MDNode::get(VMContext, Elts));
 }
 
+DIExpression DIBuilder::createPieceExpression(unsigned OffsetInBytes,
+                                              unsigned SizeInBytes) {
+  int64_t Addr[] = {dwarf::DW_OP_piece, OffsetInBytes, SizeInBytes};
+  return createExpression(Addr);
+}
+
 /// createFunction - Create a new descriptor for the specified function.
 /// FIXME: this is added for dragonegg. Once we update dragonegg
 /// to call resolve function, this will be removed.