Index: include/llvm/IR/DebugInfoMetadata.h
===================================================================
--- include/llvm/IR/DebugInfoMetadata.h
+++ include/llvm/IR/DebugInfoMetadata.h
@@ -1690,6 +1690,11 @@
   bool isDefinition() const { return IsDefinition; }
   bool isOptimized() const { return IsOptimized; }
 
+  void setFlags(DIFlags NewFlags) {
+    assert(!isUniqued() && "Cannot set flags on uniqued nodes");
+    Flags = NewFlags;
+  }
+
   bool isArtificial() const { return getFlags() & FlagArtificial; }
   bool isPrivate() const {
     return (getFlags() & FlagAccessibility) == FlagPrivate;