#ifndef LLVM_ADT_SPARSEBITVECTOR_H
#define LLVM_ADT_SPARSEBITVECTOR_H
-#include <cassert>
-#include <cstring>
+#include "llvm/ADT/ilist.h"
+#include "llvm/ADT/ilist_node.h"
#include "llvm/Support/DataTypes.h"
-#include "llvm/ADT/STLExtras.h"
+#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/MathExtras.h"
-#include "llvm/ADT/ilist.h"
+#include "llvm/Support/raw_ostream.h"
+#include <cassert>
+#include <climits>
namespace llvm {
template <unsigned ElementSize = 128>
struct SparseBitVectorElement
- : ilist_node<SparseBitVectorElement<ElementSize> > {
+ : public ilist_node<SparseBitVectorElement<ElementSize> > {
public:
typedef unsigned long BitWord;
enum {
- BITWORD_SIZE = sizeof(BitWord) * 8,
+ BITWORD_SIZE = sizeof(BitWord) * CHAR_BIT,
BITWORDS_PER_ELEMENT = (ElementSize + BITWORD_SIZE - 1) / BITWORD_SIZE,
BITS_PER_ELEMENT = ElementSize
};
unsigned ElementIndex;
BitWord Bits[BITWORDS_PER_ELEMENT];
// Needed for sentinels
- friend class ilist_sentinel_traits<SparseBitVectorElement>;
+ friend struct ilist_sentinel_traits<SparseBitVectorElement>;
SparseBitVectorElement() {
ElementIndex = ~0U;
memset(&Bits[0], 0, sizeof (BitWord) * BITWORDS_PER_ELEMENT);
else if (sizeof(BitWord) == 8)
NumBits += CountPopulation_64(Bits[i]);
else
- assert(0 && "Unsupported!");
+ llvm_unreachable("Unsupported!");
return NumBits;
}
for (unsigned i = 0; i < BITWORDS_PER_ELEMENT; ++i)
if (Bits[i] != 0) {
if (sizeof(BitWord) == 4)
- return i * BITWORD_SIZE + CountTrailingZeros_32(Bits[i]);
- else if (sizeof(BitWord) == 8)
- return i * BITWORD_SIZE + CountTrailingZeros_64(Bits[i]);
- else
- assert(0 && "Unsupported!");
+ return i * BITWORD_SIZE + countTrailingZeros(Bits[i]);
+ if (sizeof(BitWord) == 8)
+ return i * BITWORD_SIZE + countTrailingZeros(Bits[i]);
+ llvm_unreachable("Unsupported!");
}
- assert(0 && "Illegal empty element");
- return 0; // Not reached
+ llvm_unreachable("Illegal empty element");
}
/// find_next - Returns the index of the next set bit starting from the
&& "Word Position outside of element");
// Mask off previous bits.
- Copy &= ~0L << BitPos;
+ Copy &= ~0UL << BitPos;
if (Copy != 0) {
if (sizeof(BitWord) == 4)
- return WordPos * BITWORD_SIZE + CountTrailingZeros_32(Copy);
- else if (sizeof(BitWord) == 8)
- return WordPos * BITWORD_SIZE + CountTrailingZeros_64(Copy);
- else
- assert(0 && "Unsupported!");
+ return WordPos * BITWORD_SIZE + countTrailingZeros(Copy);
+ if (sizeof(BitWord) == 8)
+ return WordPos * BITWORD_SIZE + countTrailingZeros(Copy);
+ llvm_unreachable("Unsupported!");
}
// Check subsequent words.
for (unsigned i = WordPos+1; i < BITWORDS_PER_ELEMENT; ++i)
if (Bits[i] != 0) {
if (sizeof(BitWord) == 4)
- return i * BITWORD_SIZE + CountTrailingZeros_32(Bits[i]);
- else if (sizeof(BitWord) == 8)
- return i * BITWORD_SIZE + CountTrailingZeros_64(Bits[i]);
- else
- assert(0 && "Unsupported!");
+ return i * BITWORD_SIZE + countTrailingZeros(Bits[i]);
+ if (sizeof(BitWord) == 8)
+ return i * BITWORD_SIZE + countTrailingZeros(Bits[i]);
+ llvm_unreachable("Unsupported!");
}
return -1;
}
}
BecameZero = allzero;
}
+};
- // Get a hash value for this element;
- uint64_t getHashValue() const {
- uint64_t HashVal = 0;
- for (unsigned i = 0; i < BITWORDS_PER_ELEMENT; ++i) {
- HashVal ^= Bits[i];
- }
- return HashVal;
- }
+template <unsigned ElementSize>
+struct ilist_traits<SparseBitVectorElement<ElementSize> >
+ : public ilist_default_traits<SparseBitVectorElement<ElementSize> > {
+ typedef SparseBitVectorElement<ElementSize> Element;
+
+ Element *createSentinel() const { return static_cast<Element *>(&Sentinel); }
+ static void destroySentinel(Element *) {}
+
+ Element *provideInitialHead() const { return createSentinel(); }
+ Element *ensureHead(Element *) const { return createSentinel(); }
+ static void noteHead(Element *, Element *) {}
+
+private:
+ mutable ilist_half_node<Element> Sentinel;
};
template <unsigned ElementSize = 128>
CurrElementIter = Elements.begin ();
}
+ // Clear.
+ void clear() {
+ Elements.clear();
+ }
+
// Assignment
SparseBitVector& operator=(const SparseBitVector& RHS) {
Elements.clear();
return changed;
}
- // Intersect our bitmap with the complement of the RHS and return true if ours
- // changed.
+ // Intersect our bitmap with the complement of the RHS and return true
+ // if ours changed.
bool intersectWithComplement(const SparseBitVector &RHS) {
bool changed = false;
ElementListIter Iter1 = Elements.begin();
}
- // Three argument version of intersectWithComplement. Result of RHS1 & ~RHS2
- // is stored into this bitmap.
+ // Three argument version of intersectWithComplement.
+ // Result of RHS1 & ~RHS2 is stored into this bitmap.
void intersectWithComplement(const SparseBitVector<ElementSize> &RHS1,
const SparseBitVector<ElementSize> &RHS2)
{
return false;
}
+ // Return true iff all bits set in this SparseBitVector are
+ // also set in RHS.
+ bool contains(const SparseBitVector<ElementSize> &RHS) const {
+ SparseBitVector<ElementSize> Result(*this);
+ Result &= RHS;
+ return (Result == RHS);
+ }
+
// Return the first set bit in the bitmap. Return -1 if no bits are set.
int find_first() const {
if (Elements.empty())
iterator end() const {
return iterator(this, true);
}
-
- // Get a hash value for this bitmap.
- uint64_t getHashValue() const {
- uint64_t HashVal = 0;
- for (ElementListConstIter Iter = Elements.begin();
- Iter != Elements.end();
- ++Iter) {
- HashVal ^= Iter->index();
- HashVal ^= Iter->getHashValue();
- }
- return HashVal;
- }
};
// Convenience functions to allow Or and And without dereferencing in the user
template <unsigned ElementSize>
inline bool operator &=(SparseBitVector<ElementSize> &LHS,
const SparseBitVector<ElementSize> *RHS) {
- return LHS &= (*RHS);
+ return LHS &= *RHS;
}
+// Convenience functions for infix union, intersection, difference operators.
-// Dump a SparseBitVector to a stream
template <unsigned ElementSize>
-void dump(const SparseBitVector<ElementSize> &LHS, llvm::OStream &out) {
- out << "[ ";
+inline SparseBitVector<ElementSize>
+operator|(const SparseBitVector<ElementSize> &LHS,
+ const SparseBitVector<ElementSize> &RHS) {
+ SparseBitVector<ElementSize> Result(LHS);
+ Result |= RHS;
+ return Result;
+}
- typename SparseBitVector<ElementSize>::iterator bi;
- for (bi = LHS.begin(); bi != LHS.end(); ++bi) {
- out << *bi << " ";
- }
- out << " ]\n";
+template <unsigned ElementSize>
+inline SparseBitVector<ElementSize>
+operator&(const SparseBitVector<ElementSize> &LHS,
+ const SparseBitVector<ElementSize> &RHS) {
+ SparseBitVector<ElementSize> Result(LHS);
+ Result &= RHS;
+ return Result;
}
+
+template <unsigned ElementSize>
+inline SparseBitVector<ElementSize>
+operator-(const SparseBitVector<ElementSize> &LHS,
+ const SparseBitVector<ElementSize> &RHS) {
+ SparseBitVector<ElementSize> Result;
+ Result.intersectWithComplement(LHS, RHS);
+ return Result;
}
+
+// Dump a SparseBitVector to a stream
+template <unsigned ElementSize>
+void dump(const SparseBitVector<ElementSize> &LHS, raw_ostream &out) {
+ out << "[";
+
+ typename SparseBitVector<ElementSize>::iterator bi = LHS.begin(),
+ be = LHS.end();
+ if (bi != be) {
+ out << *bi;
+ for (++bi; bi != be; ++bi) {
+ out << " " << *bi;
+ }
+ }
+ out << "]\n";
+}
+} // end namespace llvm
+
#endif