1 files changed, 14 insertions, 0 deletions
diff --git a/llvm/include/llvm/Transforms/IPO/GlobalDCE.h b/llvm/include/llvm/Transforms/IPO/GlobalDCE.h
index c434484d1ae..0a6851849e7 100644
--- a/llvm/include/llvm/Transforms/IPO/GlobalDCE.h
+++ b/llvm/include/llvm/Transforms/IPO/GlobalDCE.h
@@ -43,11 +43,25 @@ private:
   /// Comdat -> Globals in that Comdat section.
   std::unordered_multimap<Comdat *, GlobalValue *> ComdatMembers;
 
+  /// !type metadata -> set of (vtable, offset) pairs
+  DenseMap<Metadata *, SmallSet<std::pair<GlobalVariable *, uint64_t>, 4>>
+      TypeIdMap;
+
+  // Global variables which are vtables, and which we have enough information
+  // about to safely do dead virtual function elimination.
+  SmallPtrSet<GlobalValue *, 32> VFESafeVTables;
+
   void UpdateGVDependencies(GlobalValue &GV);
   void MarkLive(GlobalValue &GV,
                 SmallVectorImpl<GlobalValue *> *Updates = nullptr);
   bool RemoveUnusedGlobalValue(GlobalValue &GV);
 
+  // Dead virtual function elimination.
+  void AddVirtualFunctionDependencies(Module &M);
+  void ScanVTables(Module &M);
+  void ScanTypeCheckedLoadIntrinsics(Module &M);
+  void ScanVTableLoad(Function *Caller, Metadata *TypeId, uint64_t CallOffset);
+
   void ComputeDependencies(Value *V, SmallPtrSetImpl<GlobalValue *> &U);
 };