DenseMap.h revision 7ed47a13356daed2a34cd2209a31f92552e3bdd8
16e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner//===- llvm/ADT/DenseMap.h - Dense probed hash table ------------*- C++ -*-===// 26e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner// 36e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner// The LLVM Compiler Infrastructure 46e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner// 57ed47a13356daed2a34cd2209a31f92552e3bdd8Chris Lattner// This file is distributed under the University of Illinois Open Source 67ed47a13356daed2a34cd2209a31f92552e3bdd8Chris Lattner// License. See LICENSE.TXT for details. 76e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner// 86e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner//===----------------------------------------------------------------------===// 96e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner// 106e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner// This file defines the DenseMap class. 116e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner// 126e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner//===----------------------------------------------------------------------===// 136e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner 146e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner#ifndef LLVM_ADT_DENSEMAP_H 156e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner#define LLVM_ADT_DENSEMAP_H 166e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner 176e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner#include "llvm/Support/DataTypes.h" 18398b40671b13018f88371b74822fa8ee2638577eOwen Anderson#include "llvm/Support/MathExtras.h" 196e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner#include <cassert> 20f6390f48e6324b0221d10a9c75ab625357d8a43aChris Lattner#include <utility> 216e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner 226e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattnernamespace llvm { 236e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner 246e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattnertemplate<typename T> 2576c1b97e4020faace8c95a127f1eab66c278fb58Chris Lattnerstruct DenseMapInfo { 266e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner //static inline T getEmptyKey(); 276e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner //static inline T getTombstoneKey(); 286e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner //static unsigned getHashValue(const T &Val); 2976c1b97e4020faace8c95a127f1eab66c278fb58Chris Lattner //static bool isEqual(const T &LHS, const T &RHS); 306e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner //static bool isPod() 316e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner}; 326e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner 3376c1b97e4020faace8c95a127f1eab66c278fb58Chris Lattner// Provide DenseMapInfo for all pointers. 346e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattnertemplate<typename T> 3576c1b97e4020faace8c95a127f1eab66c278fb58Chris Lattnerstruct DenseMapInfo<T*> { 36276222a5ae189ed5c6a2afb248d4c8f0335585b4Reid Spencer static inline T* getEmptyKey() { return reinterpret_cast<T*>(-1); } 37276222a5ae189ed5c6a2afb248d4c8f0335585b4Reid Spencer static inline T* getTombstoneKey() { return reinterpret_cast<T*>(-2); } 386e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner static unsigned getHashValue(const T *PtrVal) { 39f8a3ee1d637a747c87f72bc880445e6a82280ff0Chris Lattner return (unsigned((uintptr_t)PtrVal) >> 4) ^ 40f8a3ee1d637a747c87f72bc880445e6a82280ff0Chris Lattner (unsigned((uintptr_t)PtrVal) >> 9); 416e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner } 4276c1b97e4020faace8c95a127f1eab66c278fb58Chris Lattner static bool isEqual(const T *LHS, const T *RHS) { return LHS == RHS; } 4329ce95511f905df3a63e3b953a4a0179ead46865Owen Anderson static bool isPod() { return true; } 4429ce95511f905df3a63e3b953a4a0179ead46865Owen Anderson}; 4529ce95511f905df3a63e3b953a4a0179ead46865Owen Anderson 46a76b1febd4fd258e8054395adedcbd477668d956Chris Lattnertemplate<typename KeyT, typename ValueT, 4776c1b97e4020faace8c95a127f1eab66c278fb58Chris Lattner typename KeyInfoT = DenseMapInfo<KeyT>, 4876c1b97e4020faace8c95a127f1eab66c278fb58Chris Lattner typename ValueInfoT = DenseMapInfo<ValueT> > 49f6390f48e6324b0221d10a9c75ab625357d8a43aChris Lattnerclass DenseMapIterator; 50a76b1febd4fd258e8054395adedcbd477668d956Chris Lattnertemplate<typename KeyT, typename ValueT, 5176c1b97e4020faace8c95a127f1eab66c278fb58Chris Lattner typename KeyInfoT = DenseMapInfo<KeyT>, 5276c1b97e4020faace8c95a127f1eab66c278fb58Chris Lattner typename ValueInfoT = DenseMapInfo<ValueT> > 5370a76a633ed5101dbe472404efd989f4f1b3669cChris Lattnerclass DenseMapConstIterator; 546e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner 55a76b1febd4fd258e8054395adedcbd477668d956Chris Lattnertemplate<typename KeyT, typename ValueT, 5676c1b97e4020faace8c95a127f1eab66c278fb58Chris Lattner typename KeyInfoT = DenseMapInfo<KeyT>, 5776c1b97e4020faace8c95a127f1eab66c278fb58Chris Lattner typename ValueInfoT = DenseMapInfo<ValueT> > 586e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattnerclass DenseMap { 59f6390f48e6324b0221d10a9c75ab625357d8a43aChris Lattner typedef std::pair<KeyT, ValueT> BucketT; 606e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner unsigned NumBuckets; 616e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner BucketT *Buckets; 626e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner 636e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner unsigned NumEntries; 6404a3115e619740245cbe34c8c7428b4bde7868f7Chris Lattner unsigned NumTombstones; 656e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattnerpublic: 66aef806e9cb021919be8f3a988af0478f3da75758Ted Kremenek typedef BucketT value_type; 67aef806e9cb021919be8f3a988af0478f3da75758Ted Kremenek 6867280e1dd22cf9fa452c335d1e2328d13f158da1Owen Anderson DenseMap(const DenseMap& other) { 6967280e1dd22cf9fa452c335d1e2328d13f158da1Owen Anderson NumBuckets = 0; 7067280e1dd22cf9fa452c335d1e2328d13f158da1Owen Anderson CopyFrom(other); 7167280e1dd22cf9fa452c335d1e2328d13f158da1Owen Anderson } 7267280e1dd22cf9fa452c335d1e2328d13f158da1Owen Anderson 735a5f6b6e38b7155200903816f22501cce4ca36a7Chris Lattner explicit DenseMap(unsigned NumInitBuckets = 64) { 746e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner init(NumInitBuckets); 756e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner } 7667280e1dd22cf9fa452c335d1e2328d13f158da1Owen Anderson 776e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner ~DenseMap() { 786e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner const KeyT EmptyKey = getEmptyKey(), TombstoneKey = getTombstoneKey(); 796e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner for (BucketT *P = Buckets, *E = Buckets+NumBuckets; P != E; ++P) { 8005831c073abbaacbf2fc21ef5ef160872056e075Chris Lattner if (!KeyInfoT::isEqual(P->first, EmptyKey) && 8105831c073abbaacbf2fc21ef5ef160872056e075Chris Lattner !KeyInfoT::isEqual(P->first, TombstoneKey)) 82f6390f48e6324b0221d10a9c75ab625357d8a43aChris Lattner P->second.~ValueT(); 83f6390f48e6324b0221d10a9c75ab625357d8a43aChris Lattner P->first.~KeyT(); 846e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner } 85276222a5ae189ed5c6a2afb248d4c8f0335585b4Reid Spencer delete[] reinterpret_cast<char*>(Buckets); 866e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner } 876e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner 88a76b1febd4fd258e8054395adedcbd477668d956Chris Lattner typedef DenseMapIterator<KeyT, ValueT, KeyInfoT> iterator; 89a76b1febd4fd258e8054395adedcbd477668d956Chris Lattner typedef DenseMapConstIterator<KeyT, ValueT, KeyInfoT> const_iterator; 9070a76a633ed5101dbe472404efd989f4f1b3669cChris Lattner inline iterator begin() { 91a76b1febd4fd258e8054395adedcbd477668d956Chris Lattner return iterator(Buckets, Buckets+NumBuckets); 9270a76a633ed5101dbe472404efd989f4f1b3669cChris Lattner } 9370a76a633ed5101dbe472404efd989f4f1b3669cChris Lattner inline iterator end() { 94a76b1febd4fd258e8054395adedcbd477668d956Chris Lattner return iterator(Buckets+NumBuckets, Buckets+NumBuckets); 9570a76a633ed5101dbe472404efd989f4f1b3669cChris Lattner } 9670a76a633ed5101dbe472404efd989f4f1b3669cChris Lattner inline const_iterator begin() const { 97a76b1febd4fd258e8054395adedcbd477668d956Chris Lattner return const_iterator(Buckets, Buckets+NumBuckets); 9870a76a633ed5101dbe472404efd989f4f1b3669cChris Lattner } 9970a76a633ed5101dbe472404efd989f4f1b3669cChris Lattner inline const_iterator end() const { 100a76b1febd4fd258e8054395adedcbd477668d956Chris Lattner return const_iterator(Buckets+NumBuckets, Buckets+NumBuckets); 10170a76a633ed5101dbe472404efd989f4f1b3669cChris Lattner } 102f6390f48e6324b0221d10a9c75ab625357d8a43aChris Lattner 10370a76a633ed5101dbe472404efd989f4f1b3669cChris Lattner bool empty() const { return NumEntries == 0; } 1046e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner unsigned size() const { return NumEntries; } 105d81ccc2806b2c8a498d16f1a547d0cc9c00d602dDaniel Berlin 106d81ccc2806b2c8a498d16f1a547d0cc9c00d602dDaniel Berlin /// Grow the densemap so that it has at least Size buckets. Does not shrink 107d81ccc2806b2c8a498d16f1a547d0cc9c00d602dDaniel Berlin void resize(size_t Size) { grow(Size); } 1086e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner 1096e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner void clear() { 11042e4bdf2577946380ce1529d5716e48b33d4186dChris Lattner // If the capacity of the array is huge, and the # elements used is small, 11142e4bdf2577946380ce1529d5716e48b33d4186dChris Lattner // shrink the array. 1126ad5fde5d01e0c8c23b928583d2fb9489b1b5a36Owen Anderson if (NumEntries * 4 < NumBuckets && NumBuckets > 64) { 1136ad5fde5d01e0c8c23b928583d2fb9489b1b5a36Owen Anderson shrink_and_clear(); 1146ad5fde5d01e0c8c23b928583d2fb9489b1b5a36Owen Anderson return; 1156ad5fde5d01e0c8c23b928583d2fb9489b1b5a36Owen Anderson } 1166ad5fde5d01e0c8c23b928583d2fb9489b1b5a36Owen Anderson 1176e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner const KeyT EmptyKey = getEmptyKey(), TombstoneKey = getTombstoneKey(); 1186e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner for (BucketT *P = Buckets, *E = Buckets+NumBuckets; P != E; ++P) { 11905831c073abbaacbf2fc21ef5ef160872056e075Chris Lattner if (!KeyInfoT::isEqual(P->first, EmptyKey)) { 12005831c073abbaacbf2fc21ef5ef160872056e075Chris Lattner if (!KeyInfoT::isEqual(P->first, TombstoneKey)) { 1217b54452c84e478ab4d49ac08759ca4ec1badf2b2Chris Lattner P->second.~ValueT(); 1227b54452c84e478ab4d49ac08759ca4ec1badf2b2Chris Lattner --NumEntries; 1237b54452c84e478ab4d49ac08759ca4ec1badf2b2Chris Lattner } 124f6390f48e6324b0221d10a9c75ab625357d8a43aChris Lattner P->first = EmptyKey; 1256e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner } 1266e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner } 1276e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner assert(NumEntries == 0 && "Node count imbalance!"); 12804a3115e619740245cbe34c8c7428b4bde7868f7Chris Lattner NumTombstones = 0; 1296e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner } 1306ad5fde5d01e0c8c23b928583d2fb9489b1b5a36Owen Anderson 1316e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner /// count - Return true if the specified key is in the map. 1326e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner bool count(const KeyT &Val) const { 1336e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner BucketT *TheBucket; 1346e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner return LookupBucketFor(Val, TheBucket); 1356e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner } 1366e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner 137569b935e6b23c4a0e4ebb2c96603974310ef0587Chris Lattner iterator find(const KeyT &Val) { 13870a76a633ed5101dbe472404efd989f4f1b3669cChris Lattner BucketT *TheBucket; 13970a76a633ed5101dbe472404efd989f4f1b3669cChris Lattner if (LookupBucketFor(Val, TheBucket)) 14070a76a633ed5101dbe472404efd989f4f1b3669cChris Lattner return iterator(TheBucket, Buckets+NumBuckets); 14170a76a633ed5101dbe472404efd989f4f1b3669cChris Lattner return end(); 14270a76a633ed5101dbe472404efd989f4f1b3669cChris Lattner } 143569b935e6b23c4a0e4ebb2c96603974310ef0587Chris Lattner const_iterator find(const KeyT &Val) const { 144569b935e6b23c4a0e4ebb2c96603974310ef0587Chris Lattner BucketT *TheBucket; 145569b935e6b23c4a0e4ebb2c96603974310ef0587Chris Lattner if (LookupBucketFor(Val, TheBucket)) 146569b935e6b23c4a0e4ebb2c96603974310ef0587Chris Lattner return const_iterator(TheBucket, Buckets+NumBuckets); 147569b935e6b23c4a0e4ebb2c96603974310ef0587Chris Lattner return end(); 148569b935e6b23c4a0e4ebb2c96603974310ef0587Chris Lattner } 14970a76a633ed5101dbe472404efd989f4f1b3669cChris Lattner 15028f72279f5aaf34ba62ae00ca3b8bb94d8b91f70Chris Lattner bool insert(const std::pair<KeyT, ValueT> &KV) { 15128f72279f5aaf34ba62ae00ca3b8bb94d8b91f70Chris Lattner BucketT *TheBucket; 15228f72279f5aaf34ba62ae00ca3b8bb94d8b91f70Chris Lattner if (LookupBucketFor(KV.first, TheBucket)) 15328f72279f5aaf34ba62ae00ca3b8bb94d8b91f70Chris Lattner return false; // Already in map. 15428f72279f5aaf34ba62ae00ca3b8bb94d8b91f70Chris Lattner 15528f72279f5aaf34ba62ae00ca3b8bb94d8b91f70Chris Lattner // Otherwise, insert the new element. 15628f72279f5aaf34ba62ae00ca3b8bb94d8b91f70Chris Lattner InsertIntoBucket(KV.first, KV.second, TheBucket); 15728f72279f5aaf34ba62ae00ca3b8bb94d8b91f70Chris Lattner return true; 15828f72279f5aaf34ba62ae00ca3b8bb94d8b91f70Chris Lattner } 15928f72279f5aaf34ba62ae00ca3b8bb94d8b91f70Chris Lattner 16070a76a633ed5101dbe472404efd989f4f1b3669cChris Lattner bool erase(const KeyT &Val) { 16170a76a633ed5101dbe472404efd989f4f1b3669cChris Lattner BucketT *TheBucket; 16270a76a633ed5101dbe472404efd989f4f1b3669cChris Lattner if (!LookupBucketFor(Val, TheBucket)) 16370a76a633ed5101dbe472404efd989f4f1b3669cChris Lattner return false; // not in map. 16470a76a633ed5101dbe472404efd989f4f1b3669cChris Lattner 16570a76a633ed5101dbe472404efd989f4f1b3669cChris Lattner TheBucket->second.~ValueT(); 16670a76a633ed5101dbe472404efd989f4f1b3669cChris Lattner TheBucket->first = getTombstoneKey(); 16770a76a633ed5101dbe472404efd989f4f1b3669cChris Lattner --NumEntries; 16804a3115e619740245cbe34c8c7428b4bde7868f7Chris Lattner ++NumTombstones; 16970a76a633ed5101dbe472404efd989f4f1b3669cChris Lattner return true; 17070a76a633ed5101dbe472404efd989f4f1b3669cChris Lattner } 17170a76a633ed5101dbe472404efd989f4f1b3669cChris Lattner bool erase(iterator I) { 17270a76a633ed5101dbe472404efd989f4f1b3669cChris Lattner BucketT *TheBucket = &*I; 17370a76a633ed5101dbe472404efd989f4f1b3669cChris Lattner TheBucket->second.~ValueT(); 17470a76a633ed5101dbe472404efd989f4f1b3669cChris Lattner TheBucket->first = getTombstoneKey(); 17570a76a633ed5101dbe472404efd989f4f1b3669cChris Lattner --NumEntries; 17604a3115e619740245cbe34c8c7428b4bde7868f7Chris Lattner ++NumTombstones; 17770a76a633ed5101dbe472404efd989f4f1b3669cChris Lattner return true; 17870a76a633ed5101dbe472404efd989f4f1b3669cChris Lattner } 179aef806e9cb021919be8f3a988af0478f3da75758Ted Kremenek 180aef806e9cb021919be8f3a988af0478f3da75758Ted Kremenek value_type& FindAndConstruct(const KeyT &Key) { 1816e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner BucketT *TheBucket; 18228f72279f5aaf34ba62ae00ca3b8bb94d8b91f70Chris Lattner if (LookupBucketFor(Key, TheBucket)) 183aef806e9cb021919be8f3a988af0478f3da75758Ted Kremenek return *TheBucket; 184aef806e9cb021919be8f3a988af0478f3da75758Ted Kremenek 185aef806e9cb021919be8f3a988af0478f3da75758Ted Kremenek return *InsertIntoBucket(Key, ValueT(), TheBucket); 186aef806e9cb021919be8f3a988af0478f3da75758Ted Kremenek } 187aef806e9cb021919be8f3a988af0478f3da75758Ted Kremenek 188aef806e9cb021919be8f3a988af0478f3da75758Ted Kremenek ValueT &operator[](const KeyT &Key) { 189aef806e9cb021919be8f3a988af0478f3da75758Ted Kremenek return FindAndConstruct(Key).second; 19028f72279f5aaf34ba62ae00ca3b8bb94d8b91f70Chris Lattner } 19128f72279f5aaf34ba62ae00ca3b8bb94d8b91f70Chris Lattner 19267280e1dd22cf9fa452c335d1e2328d13f158da1Owen Anderson DenseMap& operator=(const DenseMap& other) { 19367280e1dd22cf9fa452c335d1e2328d13f158da1Owen Anderson CopyFrom(other); 1943d345631db71174ffc4997a88c09f21eb9ed052bOwen Anderson return *this; 19567280e1dd22cf9fa452c335d1e2328d13f158da1Owen Anderson } 19667280e1dd22cf9fa452c335d1e2328d13f158da1Owen Anderson 19728f72279f5aaf34ba62ae00ca3b8bb94d8b91f70Chris Lattnerprivate: 19867280e1dd22cf9fa452c335d1e2328d13f158da1Owen Anderson void CopyFrom(const DenseMap& other) { 19929ce95511f905df3a63e3b953a4a0179ead46865Owen Anderson if (NumBuckets != 0 && (!KeyInfoT::isPod() || !ValueInfoT::isPod())) { 20067280e1dd22cf9fa452c335d1e2328d13f158da1Owen Anderson const KeyT EmptyKey = getEmptyKey(), TombstoneKey = getTombstoneKey(); 20167280e1dd22cf9fa452c335d1e2328d13f158da1Owen Anderson for (BucketT *P = Buckets, *E = Buckets+NumBuckets; P != E; ++P) { 20205831c073abbaacbf2fc21ef5ef160872056e075Chris Lattner if (!KeyInfoT::isEqual(P->first, EmptyKey) && 20305831c073abbaacbf2fc21ef5ef160872056e075Chris Lattner !KeyInfoT::isEqual(P->first, TombstoneKey)) 20467280e1dd22cf9fa452c335d1e2328d13f158da1Owen Anderson P->second.~ValueT(); 20567280e1dd22cf9fa452c335d1e2328d13f158da1Owen Anderson P->first.~KeyT(); 20667280e1dd22cf9fa452c335d1e2328d13f158da1Owen Anderson } 20767280e1dd22cf9fa452c335d1e2328d13f158da1Owen Anderson } 20867280e1dd22cf9fa452c335d1e2328d13f158da1Owen Anderson 20967280e1dd22cf9fa452c335d1e2328d13f158da1Owen Anderson NumEntries = other.NumEntries; 21067280e1dd22cf9fa452c335d1e2328d13f158da1Owen Anderson NumTombstones = other.NumTombstones; 21167280e1dd22cf9fa452c335d1e2328d13f158da1Owen Anderson 21267280e1dd22cf9fa452c335d1e2328d13f158da1Owen Anderson if (NumBuckets) 21367280e1dd22cf9fa452c335d1e2328d13f158da1Owen Anderson delete[] reinterpret_cast<char*>(Buckets); 21467280e1dd22cf9fa452c335d1e2328d13f158da1Owen Anderson Buckets = reinterpret_cast<BucketT*>(new char[sizeof(BucketT) * 21567280e1dd22cf9fa452c335d1e2328d13f158da1Owen Anderson other.NumBuckets]); 21667280e1dd22cf9fa452c335d1e2328d13f158da1Owen Anderson 21729ce95511f905df3a63e3b953a4a0179ead46865Owen Anderson if (KeyInfoT::isPod() && ValueInfoT::isPod()) 2189544dc294f63ce116fbab398a8874ebf834cf41eOwen Anderson memcpy(Buckets, other.Buckets, other.NumBuckets * sizeof(BucketT)); 2199544dc294f63ce116fbab398a8874ebf834cf41eOwen Anderson else 2209544dc294f63ce116fbab398a8874ebf834cf41eOwen Anderson for (size_t i = 0; i < other.NumBuckets; ++i) { 2219544dc294f63ce116fbab398a8874ebf834cf41eOwen Anderson new (Buckets[i].first) KeyT(other.Buckets[i].first); 22205831c073abbaacbf2fc21ef5ef160872056e075Chris Lattner if (!KeyInfoT::isEqual(Buckets[i].first, getEmptyKey()) && 22305831c073abbaacbf2fc21ef5ef160872056e075Chris Lattner !KeyInfoT::isEqual(Buckets[i].first, getTombstoneKey())) 2244938d347723d452786c1a7c1d1b9ec79121b0040Owen Anderson new (&Buckets[i].second) ValueT(other.Buckets[i].second); 2259544dc294f63ce116fbab398a8874ebf834cf41eOwen Anderson } 22667280e1dd22cf9fa452c335d1e2328d13f158da1Owen Anderson NumBuckets = other.NumBuckets; 22767280e1dd22cf9fa452c335d1e2328d13f158da1Owen Anderson } 22867280e1dd22cf9fa452c335d1e2328d13f158da1Owen Anderson 22928f72279f5aaf34ba62ae00ca3b8bb94d8b91f70Chris Lattner BucketT *InsertIntoBucket(const KeyT &Key, const ValueT &Value, 23028f72279f5aaf34ba62ae00ca3b8bb94d8b91f70Chris Lattner BucketT *TheBucket) { 23104a3115e619740245cbe34c8c7428b4bde7868f7Chris Lattner // If the load of the hash table is more than 3/4, or if fewer than 1/8 of 23204a3115e619740245cbe34c8c7428b4bde7868f7Chris Lattner // the buckets are empty (meaning that many are filled with tombstones), 23304a3115e619740245cbe34c8c7428b4bde7868f7Chris Lattner // grow the table. 23404a3115e619740245cbe34c8c7428b4bde7868f7Chris Lattner // 23504a3115e619740245cbe34c8c7428b4bde7868f7Chris Lattner // The later case is tricky. For example, if we had one empty bucket with 23604a3115e619740245cbe34c8c7428b4bde7868f7Chris Lattner // tons of tombstones, failing lookups (e.g. for insertion) would have to 23704a3115e619740245cbe34c8c7428b4bde7868f7Chris Lattner // probe almost the entire table until it found the empty bucket. If the 23804a3115e619740245cbe34c8c7428b4bde7868f7Chris Lattner // table completely filled with tombstones, no lookup would ever succeed, 23904a3115e619740245cbe34c8c7428b4bde7868f7Chris Lattner // causing infinite loops in lookup. 24004a3115e619740245cbe34c8c7428b4bde7868f7Chris Lattner if (NumEntries*4 >= NumBuckets*3 || 24104a3115e619740245cbe34c8c7428b4bde7868f7Chris Lattner NumBuckets-(NumEntries+NumTombstones) < NumBuckets/8) { 242d81ccc2806b2c8a498d16f1a547d0cc9c00d602dDaniel Berlin this->grow(NumBuckets * 2); 24328f72279f5aaf34ba62ae00ca3b8bb94d8b91f70Chris Lattner LookupBucketFor(Key, TheBucket); 2446e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner } 2456e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner ++NumEntries; 24604a3115e619740245cbe34c8c7428b4bde7868f7Chris Lattner 24704a3115e619740245cbe34c8c7428b4bde7868f7Chris Lattner // If we are writing over a tombstone, remember this. 24805831c073abbaacbf2fc21ef5ef160872056e075Chris Lattner if (!KeyInfoT::isEqual(TheBucket->first, getEmptyKey())) 24904a3115e619740245cbe34c8c7428b4bde7868f7Chris Lattner --NumTombstones; 25004a3115e619740245cbe34c8c7428b4bde7868f7Chris Lattner 25128f72279f5aaf34ba62ae00ca3b8bb94d8b91f70Chris Lattner TheBucket->first = Key; 25228f72279f5aaf34ba62ae00ca3b8bb94d8b91f70Chris Lattner new (&TheBucket->second) ValueT(Value); 25328f72279f5aaf34ba62ae00ca3b8bb94d8b91f70Chris Lattner return TheBucket; 2546e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner } 25528f72279f5aaf34ba62ae00ca3b8bb94d8b91f70Chris Lattner 25670a76a633ed5101dbe472404efd989f4f1b3669cChris Lattner static unsigned getHashValue(const KeyT &Val) { 257a76b1febd4fd258e8054395adedcbd477668d956Chris Lattner return KeyInfoT::getHashValue(Val); 2586e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner } 25970a76a633ed5101dbe472404efd989f4f1b3669cChris Lattner static const KeyT getEmptyKey() { 260a76b1febd4fd258e8054395adedcbd477668d956Chris Lattner return KeyInfoT::getEmptyKey(); 26170a76a633ed5101dbe472404efd989f4f1b3669cChris Lattner } 26270a76a633ed5101dbe472404efd989f4f1b3669cChris Lattner static const KeyT getTombstoneKey() { 263a76b1febd4fd258e8054395adedcbd477668d956Chris Lattner return KeyInfoT::getTombstoneKey(); 2646e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner } 2656e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner 2666e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner /// LookupBucketFor - Lookup the appropriate bucket for Val, returning it in 2676e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner /// FoundBucket. If the bucket contains the key and a value, this returns 2686e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner /// true, otherwise it returns a bucket with an empty marker or tombstone and 2696e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner /// returns false. 2706e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner bool LookupBucketFor(const KeyT &Val, BucketT *&FoundBucket) const { 2716e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner unsigned BucketNo = getHashValue(Val); 2726e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner unsigned ProbeAmt = 1; 2736e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner BucketT *BucketsPtr = Buckets; 2746e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner 2756e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner // FoundTombstone - Keep track of whether we find a tombstone while probing. 2766e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner BucketT *FoundTombstone = 0; 2776e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner const KeyT EmptyKey = getEmptyKey(); 2786e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner const KeyT TombstoneKey = getTombstoneKey(); 27905831c073abbaacbf2fc21ef5ef160872056e075Chris Lattner assert(!KeyInfoT::isEqual(Val, EmptyKey) && 28005831c073abbaacbf2fc21ef5ef160872056e075Chris Lattner !KeyInfoT::isEqual(Val, TombstoneKey) && 2816e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner "Empty/Tombstone value shouldn't be inserted into map!"); 2826e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner 2836e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner while (1) { 2846e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner BucketT *ThisBucket = BucketsPtr + (BucketNo & (NumBuckets-1)); 2856e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner // Found Val's bucket? If so, return it. 28676c1b97e4020faace8c95a127f1eab66c278fb58Chris Lattner if (KeyInfoT::isEqual(ThisBucket->first, Val)) { 2876e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner FoundBucket = ThisBucket; 2886e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner return true; 2896e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner } 2906e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner 2916e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner // If we found an empty bucket, the key doesn't exist in the set. 2926e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner // Insert it and return the default value. 29376c1b97e4020faace8c95a127f1eab66c278fb58Chris Lattner if (KeyInfoT::isEqual(ThisBucket->first, EmptyKey)) { 2946e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner // If we've already seen a tombstone while probing, fill it in instead 2956e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner // of the empty bucket we eventually probed to. 2966e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner if (FoundTombstone) ThisBucket = FoundTombstone; 2976e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner FoundBucket = FoundTombstone ? FoundTombstone : ThisBucket; 2986e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner return false; 2996e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner } 3006e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner 3016e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner // If this is a tombstone, remember it. If Val ends up not in the map, we 3026e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner // prefer to return it than something that would require more probing. 30376c1b97e4020faace8c95a127f1eab66c278fb58Chris Lattner if (KeyInfoT::isEqual(ThisBucket->first, TombstoneKey) && !FoundTombstone) 3046e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner FoundTombstone = ThisBucket; // Remember the first tombstone found. 3056e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner 3066e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner // Otherwise, it's a hash collision or a tombstone, continue quadratic 3076e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner // probing. 3086e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner BucketNo += ProbeAmt++; 3096e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner } 3106e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner } 3116e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner 3126e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner void init(unsigned InitBuckets) { 3136e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner NumEntries = 0; 31404a3115e619740245cbe34c8c7428b4bde7868f7Chris Lattner NumTombstones = 0; 3156e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner NumBuckets = InitBuckets; 3166e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner assert(InitBuckets && (InitBuckets & InitBuckets-1) == 0 && 3176e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner "# initial buckets must be a power of two!"); 318276222a5ae189ed5c6a2afb248d4c8f0335585b4Reid Spencer Buckets = reinterpret_cast<BucketT*>(new char[sizeof(BucketT)*InitBuckets]); 3196e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner // Initialize all the keys to EmptyKey. 3206e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner const KeyT EmptyKey = getEmptyKey(); 3216e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner for (unsigned i = 0; i != InitBuckets; ++i) 322f6390f48e6324b0221d10a9c75ab625357d8a43aChris Lattner new (&Buckets[i].first) KeyT(EmptyKey); 3236e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner } 3246e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner 325d81ccc2806b2c8a498d16f1a547d0cc9c00d602dDaniel Berlin void grow(unsigned AtLeast) { 3266e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner unsigned OldNumBuckets = NumBuckets; 3276e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner BucketT *OldBuckets = Buckets; 3286e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner 3296e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner // Double the number of buckets. 330d81ccc2806b2c8a498d16f1a547d0cc9c00d602dDaniel Berlin while (NumBuckets <= AtLeast) 331d81ccc2806b2c8a498d16f1a547d0cc9c00d602dDaniel Berlin NumBuckets <<= 1; 33204a3115e619740245cbe34c8c7428b4bde7868f7Chris Lattner NumTombstones = 0; 333276222a5ae189ed5c6a2afb248d4c8f0335585b4Reid Spencer Buckets = reinterpret_cast<BucketT*>(new char[sizeof(BucketT)*NumBuckets]); 3346e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner 3356e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner // Initialize all the keys to EmptyKey. 3366e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner const KeyT EmptyKey = getEmptyKey(); 3376e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner for (unsigned i = 0, e = NumBuckets; i != e; ++i) 338f6390f48e6324b0221d10a9c75ab625357d8a43aChris Lattner new (&Buckets[i].first) KeyT(EmptyKey); 3396e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner 3406e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner // Insert all the old elements. 3416e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner const KeyT TombstoneKey = getTombstoneKey(); 3426e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner for (BucketT *B = OldBuckets, *E = OldBuckets+OldNumBuckets; B != E; ++B) { 34305831c073abbaacbf2fc21ef5ef160872056e075Chris Lattner if (!KeyInfoT::isEqual(B->first, EmptyKey) && 34405831c073abbaacbf2fc21ef5ef160872056e075Chris Lattner !KeyInfoT::isEqual(B->first, TombstoneKey)) { 3456e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner // Insert the key/value into the new table. 3466e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner BucketT *DestBucket; 347f6390f48e6324b0221d10a9c75ab625357d8a43aChris Lattner bool FoundVal = LookupBucketFor(B->first, DestBucket); 348137d4b253384adce88bfa2a1c37695d90f0a9d6cChris Lattner FoundVal = FoundVal; // silence warning. 3496e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner assert(!FoundVal && "Key already in new map?"); 350f6390f48e6324b0221d10a9c75ab625357d8a43aChris Lattner DestBucket->first = B->first; 351f6390f48e6324b0221d10a9c75ab625357d8a43aChris Lattner new (&DestBucket->second) ValueT(B->second); 3526e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner 3536e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner // Free the value. 354f6390f48e6324b0221d10a9c75ab625357d8a43aChris Lattner B->second.~ValueT(); 3556e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner } 356f6390f48e6324b0221d10a9c75ab625357d8a43aChris Lattner B->first.~KeyT(); 3576e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner } 3586e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner 3596e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner // Free the old table. 360276222a5ae189ed5c6a2afb248d4c8f0335585b4Reid Spencer delete[] reinterpret_cast<char*>(OldBuckets); 3616e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner } 3626ad5fde5d01e0c8c23b928583d2fb9489b1b5a36Owen Anderson 3636ad5fde5d01e0c8c23b928583d2fb9489b1b5a36Owen Anderson void shrink_and_clear() { 3646ad5fde5d01e0c8c23b928583d2fb9489b1b5a36Owen Anderson unsigned OldNumBuckets = NumBuckets; 3656ad5fde5d01e0c8c23b928583d2fb9489b1b5a36Owen Anderson BucketT *OldBuckets = Buckets; 3666ad5fde5d01e0c8c23b928583d2fb9489b1b5a36Owen Anderson 367398b40671b13018f88371b74822fa8ee2638577eOwen Anderson // Reduce the number of buckets. 368398b40671b13018f88371b74822fa8ee2638577eOwen Anderson NumBuckets = NumEntries > 32 ? 1 << (Log2_32_Ceil(NumEntries) + 1) 369398b40671b13018f88371b74822fa8ee2638577eOwen Anderson : 64; 3706ad5fde5d01e0c8c23b928583d2fb9489b1b5a36Owen Anderson NumTombstones = 0; 371276222a5ae189ed5c6a2afb248d4c8f0335585b4Reid Spencer Buckets = reinterpret_cast<BucketT*>(new char[sizeof(BucketT)*NumBuckets]); 3726ad5fde5d01e0c8c23b928583d2fb9489b1b5a36Owen Anderson 3736ad5fde5d01e0c8c23b928583d2fb9489b1b5a36Owen Anderson // Initialize all the keys to EmptyKey. 3746ad5fde5d01e0c8c23b928583d2fb9489b1b5a36Owen Anderson const KeyT EmptyKey = getEmptyKey(); 3756ad5fde5d01e0c8c23b928583d2fb9489b1b5a36Owen Anderson for (unsigned i = 0, e = NumBuckets; i != e; ++i) 3766ad5fde5d01e0c8c23b928583d2fb9489b1b5a36Owen Anderson new (&Buckets[i].first) KeyT(EmptyKey); 3776ad5fde5d01e0c8c23b928583d2fb9489b1b5a36Owen Anderson 3786ad5fde5d01e0c8c23b928583d2fb9489b1b5a36Owen Anderson // Free the old buckets. 3796ad5fde5d01e0c8c23b928583d2fb9489b1b5a36Owen Anderson const KeyT TombstoneKey = getTombstoneKey(); 3806ad5fde5d01e0c8c23b928583d2fb9489b1b5a36Owen Anderson for (BucketT *B = OldBuckets, *E = OldBuckets+OldNumBuckets; B != E; ++B) { 38105831c073abbaacbf2fc21ef5ef160872056e075Chris Lattner if (!KeyInfoT::isEqual(B->first, EmptyKey) && 38205831c073abbaacbf2fc21ef5ef160872056e075Chris Lattner !KeyInfoT::isEqual(B->first, TombstoneKey)) { 3836ad5fde5d01e0c8c23b928583d2fb9489b1b5a36Owen Anderson // Free the value. 3846ad5fde5d01e0c8c23b928583d2fb9489b1b5a36Owen Anderson B->second.~ValueT(); 3856ad5fde5d01e0c8c23b928583d2fb9489b1b5a36Owen Anderson } 3866ad5fde5d01e0c8c23b928583d2fb9489b1b5a36Owen Anderson B->first.~KeyT(); 3876ad5fde5d01e0c8c23b928583d2fb9489b1b5a36Owen Anderson } 3886ad5fde5d01e0c8c23b928583d2fb9489b1b5a36Owen Anderson 3896ad5fde5d01e0c8c23b928583d2fb9489b1b5a36Owen Anderson // Free the old table. 390276222a5ae189ed5c6a2afb248d4c8f0335585b4Reid Spencer delete[] reinterpret_cast<char*>(OldBuckets); 3916ad5fde5d01e0c8c23b928583d2fb9489b1b5a36Owen Anderson 3926ad5fde5d01e0c8c23b928583d2fb9489b1b5a36Owen Anderson NumEntries = 0; 3936ad5fde5d01e0c8c23b928583d2fb9489b1b5a36Owen Anderson } 3946e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner}; 3956e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner 39629ce95511f905df3a63e3b953a4a0179ead46865Owen Andersontemplate<typename KeyT, typename ValueT, typename KeyInfoT, typename ValueInfoT> 397f6390f48e6324b0221d10a9c75ab625357d8a43aChris Lattnerclass DenseMapIterator { 398f6390f48e6324b0221d10a9c75ab625357d8a43aChris Lattner typedef std::pair<KeyT, ValueT> BucketT; 39970a76a633ed5101dbe472404efd989f4f1b3669cChris Lattnerprotected: 400f6390f48e6324b0221d10a9c75ab625357d8a43aChris Lattner const BucketT *Ptr, *End; 401f6390f48e6324b0221d10a9c75ab625357d8a43aChris Lattnerpublic: 402f6390f48e6324b0221d10a9c75ab625357d8a43aChris Lattner DenseMapIterator(const BucketT *Pos, const BucketT *E) : Ptr(Pos), End(E) { 403f6390f48e6324b0221d10a9c75ab625357d8a43aChris Lattner AdvancePastEmptyBuckets(); 404f6390f48e6324b0221d10a9c75ab625357d8a43aChris Lattner } 405f6390f48e6324b0221d10a9c75ab625357d8a43aChris Lattner 40670a76a633ed5101dbe472404efd989f4f1b3669cChris Lattner std::pair<KeyT, ValueT> &operator*() const { 40770a76a633ed5101dbe472404efd989f4f1b3669cChris Lattner return *const_cast<BucketT*>(Ptr); 408f6390f48e6324b0221d10a9c75ab625357d8a43aChris Lattner } 40970a76a633ed5101dbe472404efd989f4f1b3669cChris Lattner std::pair<KeyT, ValueT> *operator->() const { 41070a76a633ed5101dbe472404efd989f4f1b3669cChris Lattner return const_cast<BucketT*>(Ptr); 411f6390f48e6324b0221d10a9c75ab625357d8a43aChris Lattner } 412f6390f48e6324b0221d10a9c75ab625357d8a43aChris Lattner 413f6390f48e6324b0221d10a9c75ab625357d8a43aChris Lattner bool operator==(const DenseMapIterator &RHS) const { 414f6390f48e6324b0221d10a9c75ab625357d8a43aChris Lattner return Ptr == RHS.Ptr; 415f6390f48e6324b0221d10a9c75ab625357d8a43aChris Lattner } 416f6390f48e6324b0221d10a9c75ab625357d8a43aChris Lattner bool operator!=(const DenseMapIterator &RHS) const { 417f6390f48e6324b0221d10a9c75ab625357d8a43aChris Lattner return Ptr != RHS.Ptr; 418f6390f48e6324b0221d10a9c75ab625357d8a43aChris Lattner } 419f6390f48e6324b0221d10a9c75ab625357d8a43aChris Lattner 420f6390f48e6324b0221d10a9c75ab625357d8a43aChris Lattner inline DenseMapIterator& operator++() { // Preincrement 421f6390f48e6324b0221d10a9c75ab625357d8a43aChris Lattner ++Ptr; 422f6390f48e6324b0221d10a9c75ab625357d8a43aChris Lattner AdvancePastEmptyBuckets(); 423f6390f48e6324b0221d10a9c75ab625357d8a43aChris Lattner return *this; 424f6390f48e6324b0221d10a9c75ab625357d8a43aChris Lattner } 425f6390f48e6324b0221d10a9c75ab625357d8a43aChris Lattner DenseMapIterator operator++(int) { // Postincrement 426f6390f48e6324b0221d10a9c75ab625357d8a43aChris Lattner DenseMapIterator tmp = *this; ++*this; return tmp; 427f6390f48e6324b0221d10a9c75ab625357d8a43aChris Lattner } 428f6390f48e6324b0221d10a9c75ab625357d8a43aChris Lattner 429f6390f48e6324b0221d10a9c75ab625357d8a43aChris Lattnerprivate: 430f6390f48e6324b0221d10a9c75ab625357d8a43aChris Lattner void AdvancePastEmptyBuckets() { 431a76b1febd4fd258e8054395adedcbd477668d956Chris Lattner const KeyT Empty = KeyInfoT::getEmptyKey(); 432a76b1febd4fd258e8054395adedcbd477668d956Chris Lattner const KeyT Tombstone = KeyInfoT::getTombstoneKey(); 433f6390f48e6324b0221d10a9c75ab625357d8a43aChris Lattner 43476c1b97e4020faace8c95a127f1eab66c278fb58Chris Lattner while (Ptr != End && 43576c1b97e4020faace8c95a127f1eab66c278fb58Chris Lattner (KeyInfoT::isEqual(Ptr->first, Empty) || 43676c1b97e4020faace8c95a127f1eab66c278fb58Chris Lattner KeyInfoT::isEqual(Ptr->first, Tombstone))) 437f6390f48e6324b0221d10a9c75ab625357d8a43aChris Lattner ++Ptr; 438f6390f48e6324b0221d10a9c75ab625357d8a43aChris Lattner } 439f6390f48e6324b0221d10a9c75ab625357d8a43aChris Lattner}; 440f6390f48e6324b0221d10a9c75ab625357d8a43aChris Lattner 44129ce95511f905df3a63e3b953a4a0179ead46865Owen Andersontemplate<typename KeyT, typename ValueT, typename KeyInfoT, typename ValueInfoT> 442a76b1febd4fd258e8054395adedcbd477668d956Chris Lattnerclass DenseMapConstIterator : public DenseMapIterator<KeyT, ValueT, KeyInfoT> { 44370a76a633ed5101dbe472404efd989f4f1b3669cChris Lattnerpublic: 44470a76a633ed5101dbe472404efd989f4f1b3669cChris Lattner DenseMapConstIterator(const std::pair<KeyT, ValueT> *Pos, 44570a76a633ed5101dbe472404efd989f4f1b3669cChris Lattner const std::pair<KeyT, ValueT> *E) 446569b935e6b23c4a0e4ebb2c96603974310ef0587Chris Lattner : DenseMapIterator<KeyT, ValueT, KeyInfoT>(Pos, E) { 44770a76a633ed5101dbe472404efd989f4f1b3669cChris Lattner } 44870a76a633ed5101dbe472404efd989f4f1b3669cChris Lattner const std::pair<KeyT, ValueT> &operator*() const { 44970a76a633ed5101dbe472404efd989f4f1b3669cChris Lattner return *this->Ptr; 45070a76a633ed5101dbe472404efd989f4f1b3669cChris Lattner } 45170a76a633ed5101dbe472404efd989f4f1b3669cChris Lattner const std::pair<KeyT, ValueT> *operator->() const { 45270a76a633ed5101dbe472404efd989f4f1b3669cChris Lattner return this->Ptr; 45370a76a633ed5101dbe472404efd989f4f1b3669cChris Lattner } 45470a76a633ed5101dbe472404efd989f4f1b3669cChris Lattner}; 455f6390f48e6324b0221d10a9c75ab625357d8a43aChris Lattner 4566e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner} // end namespace llvm 4576e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner 4586e94c00ab29e654125e845f3bce692a3764c1c11Chris Lattner#endif 459