#define LLVM_ADT_DENSEMAP_H
#include "llvm/ADT/DenseMapInfo.h"
+#include "llvm/ADT/EpochTracker.h"
#include "llvm/Support/AlignOf.h"
#include "llvm/Support/Compiler.h"
#include "llvm/Support/MathExtras.h"
template <typename DerivedT, typename KeyT, typename ValueT, typename KeyInfoT,
typename BucketT>
-class DenseMapBase {
+class DenseMapBase : public DebugEpochBase {
public:
typedef unsigned size_type;
typedef KeyT key_type;
const_iterator;
inline iterator begin() {
// When the map is empty, avoid the overhead of AdvancePastEmptyBuckets().
- return empty() ? end() : iterator(getBuckets(), getBucketsEnd());
+ return empty() ? end() : iterator(getBuckets(), getBucketsEnd(), *this);
}
inline iterator end() {
- return iterator(getBucketsEnd(), getBucketsEnd(), true);
+ return iterator(getBucketsEnd(), getBucketsEnd(), *this, true);
}
inline const_iterator begin() const {
- return empty() ? end() : const_iterator(getBuckets(), getBucketsEnd());
+ return empty() ? end()
+ : const_iterator(getBuckets(), getBucketsEnd(), *this);
}
inline const_iterator end() const {
- return const_iterator(getBucketsEnd(), getBucketsEnd(), true);
+ return const_iterator(getBucketsEnd(), getBucketsEnd(), *this, true);
}
bool LLVM_ATTRIBUTE_UNUSED_RESULT empty() const {
/// Grow the densemap so that it has at least Size buckets. Does not shrink
void resize(size_type Size) {
+ incrementEpoch();
if (Size > getNumBuckets())
grow(Size);
}
void clear() {
+ incrementEpoch();
if (getNumEntries() == 0 && getNumTombstones() == 0) return;
// If the capacity of the array is huge, and the # elements used is small,
}
const KeyT EmptyKey = getEmptyKey(), TombstoneKey = getTombstoneKey();
+ unsigned NumEntries = getNumEntries();
for (BucketT *P = getBuckets(), *E = getBucketsEnd(); P != E; ++P) {
if (!KeyInfoT::isEqual(P->getFirst(), EmptyKey)) {
if (!KeyInfoT::isEqual(P->getFirst(), TombstoneKey)) {
P->getSecond().~ValueT();
- decrementNumEntries();
+ --NumEntries;
}
P->getFirst() = EmptyKey;
}
}
- assert(getNumEntries() == 0 && "Node count imbalance!");
+ assert(NumEntries == 0 && "Node count imbalance!");
+ setNumEntries(0);
setNumTombstones(0);
}
iterator find(const KeyT &Val) {
BucketT *TheBucket;
if (LookupBucketFor(Val, TheBucket))
- return iterator(TheBucket, getBucketsEnd(), true);
+ return iterator(TheBucket, getBucketsEnd(), *this, true);
return end();
}
const_iterator find(const KeyT &Val) const {
const BucketT *TheBucket;
if (LookupBucketFor(Val, TheBucket))
- return const_iterator(TheBucket, getBucketsEnd(), true);
+ return const_iterator(TheBucket, getBucketsEnd(), *this, true);
return end();
}
iterator find_as(const LookupKeyT &Val) {
BucketT *TheBucket;
if (LookupBucketFor(Val, TheBucket))
- return iterator(TheBucket, getBucketsEnd(), true);
+ return iterator(TheBucket, getBucketsEnd(), *this, true);
return end();
}
template<class LookupKeyT>
const_iterator find_as(const LookupKeyT &Val) const {
const BucketT *TheBucket;
if (LookupBucketFor(Val, TheBucket))
- return const_iterator(TheBucket, getBucketsEnd(), true);
+ return const_iterator(TheBucket, getBucketsEnd(), *this, true);
return end();
}
std::pair<iterator, bool> insert(const std::pair<KeyT, ValueT> &KV) {
BucketT *TheBucket;
if (LookupBucketFor(KV.first, TheBucket))
- return std::make_pair(iterator(TheBucket, getBucketsEnd(), true),
+ return std::make_pair(iterator(TheBucket, getBucketsEnd(), *this, true),
false); // Already in map.
// Otherwise, insert the new element.
TheBucket = InsertIntoBucket(KV.first, KV.second, TheBucket);
- return std::make_pair(iterator(TheBucket, getBucketsEnd(), true), true);
+ return std::make_pair(iterator(TheBucket, getBucketsEnd(), *this, true),
+ true);
}
// Inserts key,value pair into the map if the key isn't already in the map.
std::pair<iterator, bool> insert(std::pair<KeyT, ValueT> &&KV) {
BucketT *TheBucket;
if (LookupBucketFor(KV.first, TheBucket))
- return std::make_pair(iterator(TheBucket, getBucketsEnd(), true),
+ return std::make_pair(iterator(TheBucket, getBucketsEnd(), *this, true),
false); // Already in map.
-
+
// Otherwise, insert the new element.
TheBucket = InsertIntoBucket(std::move(KV.first),
std::move(KV.second),
TheBucket);
- return std::make_pair(iterator(TheBucket, getBucketsEnd(), true), true);
+ return std::make_pair(iterator(TheBucket, getBucketsEnd(), *this, true),
+ true);
}
/// insert - Range insertion of pairs.
const void *getPointerIntoBucketsArray() const { return getBuckets(); }
protected:
- DenseMapBase() {}
+ DenseMapBase() = default;
void destroyAll() {
if (getNumBuckets() == 0) // Nothing to do.
P->getSecond().~ValueT();
P->getFirst().~KeyT();
}
-
-#ifndef NDEBUG
- memset((void*)getBuckets(), 0x5a, sizeof(BucketT)*getNumBuckets());
-#endif
}
void initEmpty() {
}
B->getFirst().~KeyT();
}
-
-#ifndef NDEBUG
- if (OldBucketsBegin != OldBucketsEnd)
- memset((void*)OldBucketsBegin, 0x5a,
- sizeof(BucketT) * (OldBucketsEnd - OldBucketsBegin));
-#endif
}
template <typename OtherBaseT>
}
}
- void swap(DenseMapBase& RHS) {
- std::swap(getNumEntries(), RHS.getNumEntries());
- std::swap(getNumTombstones(), RHS.getNumTombstones());
- }
-
static unsigned getHashValue(const KeyT &Val) {
return KeyInfoT::getHashValue(Val);
}
}
BucketT *InsertIntoBucketImpl(const KeyT &Key, BucketT *TheBucket) {
+ incrementEpoch();
+
// If the load of the hash table is more than 3/4, or if fewer than 1/8 of
// the buckets are empty (meaning that many are filled with tombstones),
// grow the table.
}
void swap(DenseMap& RHS) {
+ this->incrementEpoch();
+ RHS.incrementEpoch();
std::swap(Buckets, RHS.Buckets);
std::swap(NumEntries, RHS.NumEntries);
std::swap(NumTombstones, RHS.NumTombstones);
template <typename KeyT, typename ValueT, typename KeyInfoT, typename Bucket,
bool IsConst>
-class DenseMapIterator {
+class DenseMapIterator : DebugEpochBase::HandleBase {
typedef DenseMapIterator<KeyT, ValueT, KeyInfoT, Bucket, true> ConstIterator;
friend class DenseMapIterator<KeyT, ValueT, KeyInfoT, Bucket, true>;
+ friend class DenseMapIterator<KeyT, ValueT, KeyInfoT, Bucket, false>;
public:
typedef ptrdiff_t difference_type;
public:
DenseMapIterator() : Ptr(nullptr), End(nullptr) {}
- DenseMapIterator(pointer Pos, pointer E, bool NoAdvance = false)
- : Ptr(Pos), End(E) {
+ DenseMapIterator(pointer Pos, pointer E, const DebugEpochBase &Epoch,
+ bool NoAdvance = false)
+ : DebugEpochBase::HandleBase(&Epoch), Ptr(Pos), End(E) {
+ assert(isHandleInSync() && "invalid construction!");
if (!NoAdvance) AdvancePastEmptyBuckets();
}
- // If IsConst is true this is a converting constructor from iterator to
- // const_iterator and the default copy constructor is used.
- // Otherwise this is a copy constructor for iterator.
+ // Converting ctor from non-const iterators to const iterators. SFINAE'd out
+ // for const iterator destinations so it doesn't end up as a user defined copy
+ // constructor.
+ template <bool IsConstSrc,
+ typename = typename std::enable_if<!IsConstSrc && IsConst>::type>
DenseMapIterator(
- const DenseMapIterator<KeyT, ValueT, KeyInfoT, Bucket, false> &I)
- : Ptr(I.Ptr), End(I.End) {}
+ const DenseMapIterator<KeyT, ValueT, KeyInfoT, Bucket, IsConstSrc> &I)
+ : DebugEpochBase::HandleBase(I), Ptr(I.Ptr), End(I.End) {}
reference operator*() const {
+ assert(isHandleInSync() && "invalid iterator access!");
return *Ptr;
}
pointer operator->() const {
+ assert(isHandleInSync() && "invalid iterator access!");
return Ptr;
}
bool operator==(const ConstIterator &RHS) const {
- return Ptr == RHS.operator->();
+ assert((!Ptr || isHandleInSync()) && "handle not in sync!");
+ assert((!RHS.Ptr || RHS.isHandleInSync()) && "handle not in sync!");
+ assert(getEpochAddress() == RHS.getEpochAddress() &&
+ "comparing incomparable iterators!");
+ return Ptr == RHS.Ptr;
}
bool operator!=(const ConstIterator &RHS) const {
- return Ptr != RHS.operator->();
+ assert((!Ptr || isHandleInSync()) && "handle not in sync!");
+ assert((!RHS.Ptr || RHS.isHandleInSync()) && "handle not in sync!");
+ assert(getEpochAddress() == RHS.getEpochAddress() &&
+ "comparing incomparable iterators!");
+ return Ptr != RHS.Ptr;
}
inline DenseMapIterator& operator++() { // Preincrement
+ assert(isHandleInSync() && "invalid iterator access!");
++Ptr;
AdvancePastEmptyBuckets();
return *this;
}
DenseMapIterator operator++(int) { // Postincrement
+ assert(isHandleInSync() && "invalid iterator access!");
DenseMapIterator tmp = *this; ++*this; return tmp;
}
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