Temporarily revert r176882 as it needs to be implemented in a different

way for all platforms.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@191975 91177308-0d34-0410-b5e6-96231b3b80d8

lib/CodeGen/AsmPrinter/DIE.cpp

@@ -110,18 +110,6 @@ DIE::~DIE() {
     delete Children[i];
 }
 
-/// Climb up the parent chain to get the compile unit DIE to which this DIE
-/// belongs.
-DIE *DIE::getCompileUnit() {
-  DIE *p = this;
-  while (p) {
-    if (p->getTag() == dwarf::DW_TAG_compile_unit)
-      return p;
-    p = p->getParent();
-  }
-  llvm_unreachable("We should not have orphaned DIEs.");
-}
-
 DIEValue *DIE::findAttribute(uint16_t Attribute) {
   const SmallVectorImpl<DIEValue *> &Values = getValues();
   const DIEAbbrev &Abbrevs = getAbbrev();