This reverts commit d04452d54829cd7af5b43d670325ffa755ab0030 since test llvm-project/llvm/test/Bitcode/DIImportedEntity_backward.ll is broken.
This reverts commit d04452d54829cd7af5b43d670325ffa755ab0030 since test llvm-project/llvm/test/Bitcode/DIImportedEntity_backward.ll is broken.