1 files changed, 0 insertions, 99 deletions
diff --git a/include/llvm/IR/MetadataTracking.h b/include/llvm/IR/MetadataTracking.h
deleted file mode 100644
index 541d9b3b1245..000000000000
--- a/include/llvm/IR/MetadataTracking.h
+++ /dev/null
@@ -1,99 +0,0 @@
-//===- llvm/IR/MetadataTracking.h - Metadata tracking ---------------------===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-//
-// Low-level functions to enable tracking of metadata that could RAUW.
-//
-//===----------------------------------------------------------------------===//
-
-#ifndef LLVM_IR_METADATATRACKING_H
-#define LLVM_IR_METADATATRACKING_H
-
-#include "llvm/ADT/PointerUnion.h"
-#include "llvm/Support/Casting.h"
-#include <type_traits>
-
-namespace llvm {
-
-class Metadata;
-class MetadataAsValue;
-
-/// \brief API for tracking metadata references through RAUW and deletion.
-///
-/// Shared API for updating \a Metadata pointers in subclasses that support
-/// RAUW.
-///
-/// This API is not meant to be used directly.  See \a TrackingMDRef for a
-/// user-friendly tracking reference.
-class MetadataTracking {
-public:
-  /// \brief Track the reference to metadata.
-  ///
-  /// Register \c MD with \c *MD, if the subclass supports tracking.  If \c *MD
-  /// gets RAUW'ed, \c MD will be updated to the new address.  If \c *MD gets
-  /// deleted, \c MD will be set to \c nullptr.
-  ///
-  /// If tracking isn't supported, \c *MD will not change.
-  ///
-  /// \return true iff tracking is supported by \c MD.
-  static bool track(Metadata *&MD) {
-    return track(&MD, *MD, static_cast<Metadata *>(nullptr));
-  }
-
-  /// \brief Track the reference to metadata for \a Metadata.
-  ///
-  /// As \a track(Metadata*&), but with support for calling back to \c Owner to
-  /// tell it that its operand changed.  This could trigger \c Owner being
-  /// re-uniqued.
-  static bool track(void *Ref, Metadata &MD, Metadata &Owner) {
-    return track(Ref, MD, &Owner);
-  }
-
-  /// \brief Track the reference to metadata for \a MetadataAsValue.
-  ///
-  /// As \a track(Metadata*&), but with support for calling back to \c Owner to
-  /// tell it that its operand changed.  This could trigger \c Owner being
-  /// re-uniqued.
-  static bool track(void *Ref, Metadata &MD, MetadataAsValue &Owner) {
-    return track(Ref, MD, &Owner);
-  }
-
-  /// \brief Stop tracking a reference to metadata.
-  ///
-  /// Stops \c *MD from tracking \c MD.
-  static void untrack(Metadata *&MD) { untrack(&MD, *MD); }
-  static void untrack(void *Ref, Metadata &MD);
-
-  /// \brief Move tracking from one reference to another.
-  ///
-  /// Semantically equivalent to \c untrack(MD) followed by \c track(New),
-  /// except that ownership callbacks are maintained.
-  ///
-  /// Note: it is an error if \c *MD does not equal \c New.
-  ///
-  /// \return true iff tracking is supported by \c MD.
-  static bool retrack(Metadata *&MD, Metadata *&New) {
-    return retrack(&MD, *MD, &New);
-  }
-  static bool retrack(void *Ref, Metadata &MD, void *New);
-
-  /// \brief Check whether metadata is replaceable.
-  static bool isReplaceable(const Metadata &MD);
-
-  typedef PointerUnion<MetadataAsValue *, Metadata *> OwnerTy;
-
-private:
-  /// \brief Track a reference to metadata for an owner.
-  ///
-  /// Generalized version of tracking.
-  static bool track(void *Ref, Metadata &MD, OwnerTy Owner);
-};
-
-} // end namespace llvm
-
-#endif