1 files changed, 39 insertions, 4 deletions
diff --git a/include/llvm/IR/MDBuilder.h b/include/llvm/IR/MDBuilder.h
index 37d263b..d29512c 100644
--- a/include/llvm/IR/MDBuilder.h
+++ b/include/llvm/IR/MDBuilder.h
@@ -15,6 +15,7 @@
 #ifndef LLVM_IR_MDBUILDER_H
 #define LLVM_IR_MDBUILDER_H
 
+#include "llvm/ADT/StringRef.h"
 #include "llvm/Support/DataTypes.h"
 #include <utility>
 
@@ -25,7 +26,6 @@ template <typename T> class ArrayRef;
 class LLVMContext;
 class MDNode;
 class MDString;
-class StringRef;
 
 class MDBuilder {
   LLVMContext &Context;
@@ -63,19 +63,54 @@ public:
   MDNode *createRange(const APInt &Lo, const APInt &Hi);
 
   //===------------------------------------------------------------------===//
-  // TBAA metadata.
+  // AA metadata.
   //===------------------------------------------------------------------===//
 
-  /// \brief Return metadata appropriate for a TBAA root node.  Each returned
+protected:
+  /// \brief Return metadata appropriate for a AA root node (scope or TBAA).
+  /// Each returned node is distinct from all other metadata and will never
+  /// be identified (uniqued) with anything else.
+  MDNode *createAnonymousAARoot(StringRef Name = StringRef(),
+                                MDNode *Extra = nullptr);
+
+public:
+  /// \brief Return metadata appropriate for a TBAA root node. Each returned
   /// node is distinct from all other metadata and will never be identified
   /// (uniqued) with anything else.
-  MDNode *createAnonymousTBAARoot();
+  MDNode *createAnonymousTBAARoot() {
+    return createAnonymousAARoot();
+  }
+
+  /// \brief Return metadata appropriate for an alias scope domain node.
+  /// Each returned node is distinct from all other metadata and will never
+  /// be identified (uniqued) with anything else.
+  MDNode *createAnonymousAliasScopeDomain(StringRef Name = StringRef()) {
+    return createAnonymousAARoot(Name);
+  }
+
+  /// \brief Return metadata appropriate for an alias scope root node.
+  /// Each returned node is distinct from all other metadata and will never
+  /// be identified (uniqued) with anything else.
+  MDNode *createAnonymousAliasScope(MDNode *Domain,
+                                    StringRef Name = StringRef()) {
+    return createAnonymousAARoot(Name, Domain);
+  }
 
   /// \brief Return metadata appropriate for a TBAA root node with the given
   /// name.  This may be identified (uniqued) with other roots with the same
   /// name.
   MDNode *createTBAARoot(StringRef Name);
 
+  /// \brief Return metadata appropriate for an alias scope domain node with
+  /// the given name. This may be identified (uniqued) with other roots with
+  /// the same name.
+  MDNode *createAliasScopeDomain(StringRef Name);
+
+  /// \brief Return metadata appropriate for an alias scope node with
+  /// the given name. This may be identified (uniqued) with other scopes with
+  /// the same name and domain.
+  MDNode *createAliasScope(StringRef Name, MDNode *Domain);
+
   /// \brief Return metadata for a non-root TBAA node with the given name,
   /// parent in the TBAA tree, and value for 'pointsToConstantMemory'.
   MDNode *createTBAANode(StringRef Name, MDNode *Parent,