1 //===- MetadataImpl.h - Helpers for implementing metadata -----------------===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 // 10 // This file has private helpers for implementing metadata types. 11 // 12 //===----------------------------------------------------------------------===// 13 14 #ifndef LLVM_IR_METADATAIMPL_H 15 #define LLVM_IR_METADATAIMPL_H 16 17 #include "llvm/ADT/DenseSet.h" 18 #include "llvm/IR/Metadata.h" 19 20 namespace llvm { 21 22 template <class T, class InfoT> 23 static T *getUniqued(DenseSet<T *, InfoT> &Store, 24 const typename InfoT::KeyTy &Key) { 25 auto I = Store.find_as(Key); 26 return I == Store.end() ? nullptr : *I; 27 } 28 29 template <class T> T *MDNode::storeImpl(T *N, StorageType Storage) { 30 switch (Storage) { 31 case Uniqued: 32 llvm_unreachable("Cannot unique without a uniquing-store"); 33 case Distinct: 34 N->storeDistinctInContext(); 35 break; 36 case Temporary: 37 break; 38 } 39 return N; 40 } 41 42 template <class T, class StoreT> 43 T *MDNode::storeImpl(T *N, StorageType Storage, StoreT &Store) { 44 switch (Storage) { 45 case Uniqued: 46 Store.insert(N); 47 break; 48 case Distinct: 49 N->storeDistinctInContext(); 50 break; 51 case Temporary: 52 break; 53 } 54 return N; 55 } 56 57 } // end namespace llvm 58 59 #endif 60
