enum { BITWORD_SIZE = (unsigned)sizeof(BitWord) * CHAR_BIT };
+ static_assert(BITWORD_SIZE == 64 || BITWORD_SIZE == 32,
+ "Unsupported word size");
+
BitWord *Bits; // Actual bits.
unsigned Size; // Size of bitvector in bits.
unsigned Capacity; // Size of allocated memory in BitWord.
/// of the bits are set.
int find_first() const {
for (unsigned i = 0; i < NumBitWords(size()); ++i)
- if (Bits[i] != 0) {
- if (sizeof(BitWord) == 4)
- return i * BITWORD_SIZE + countTrailingZeros((uint32_t)Bits[i]);
- if (sizeof(BitWord) == 8)
- return i * BITWORD_SIZE + countTrailingZeros(Bits[i]);
- llvm_unreachable("Unsupported!");
- }
+ if (Bits[i] != 0)
+ return i * BITWORD_SIZE + countTrailingZeros(Bits[i]);
return -1;
}
// Mask off previous bits.
Copy &= ~0UL << BitPos;
- if (Copy != 0) {
- if (sizeof(BitWord) == 4)
- return WordPos * BITWORD_SIZE + countTrailingZeros((uint32_t)Copy);
- if (sizeof(BitWord) == 8)
- return WordPos * BITWORD_SIZE + countTrailingZeros(Copy);
- llvm_unreachable("Unsupported!");
- }
+ if (Copy != 0)
+ return WordPos * BITWORD_SIZE + countTrailingZeros(Copy);
// Check subsequent words.
for (unsigned i = WordPos+1; i < NumBitWords(size()); ++i)
- if (Bits[i] != 0) {
- if (sizeof(BitWord) == 4)
- return i * BITWORD_SIZE + countTrailingZeros((uint32_t)Bits[i]);
- if (sizeof(BitWord) == 8)
- return i * BITWORD_SIZE + countTrailingZeros(Bits[i]);
- llvm_unreachable("Unsupported!");
- }
+ if (Bits[i] != 0)
+ return i * BITWORD_SIZE + countTrailingZeros(Bits[i]);
return -1;
}
template<bool AddBits, bool InvertMask>
void applyMask(const uint32_t *Mask, unsigned MaskWords) {
- assert(BITWORD_SIZE % 32 == 0 && "Unsupported BitWord size.");
+ static_assert(BITWORD_SIZE % 32 == 0, "Unsupported BitWord size.");
MaskWords = std::min(MaskWords, (size() + 31) / 32);
const unsigned Scale = BITWORD_SIZE / 32;
unsigned i;
SmallNumDataBits = SmallNumRawBits - SmallNumSizeBits
};
+ static_assert(NumBaseBits == 64 || NumBaseBits == 32,
+ "Unsupported word size");
+
public:
typedef unsigned size_type;
// Encapsulation of a single bit.
uintptr_t Bits = getSmallBits();
if (Bits == 0)
return -1;
- if (NumBaseBits == 32)
- return countTrailingZeros(Bits);
- if (NumBaseBits == 64)
- return countTrailingZeros(Bits);
- llvm_unreachable("Unsupported!");
+ return countTrailingZeros(Bits);
}
return getPointer()->find_first();
}
Bits &= ~uintptr_t(0) << (Prev + 1);
if (Bits == 0 || Prev + 1 >= getSmallSize())
return -1;
- if (NumBaseBits == 32)
- return countTrailingZeros(Bits);
- if (NumBaseBits == 64)
- return countTrailingZeros(Bits);
- llvm_unreachable("Unsupported!");
+ return countTrailingZeros(Bits);
}
return getPointer()->find_next(Prev);
}
private:
template<bool AddBits, bool InvertMask>
void applyMask(const uint32_t *Mask, unsigned MaskWords) {
- assert((NumBaseBits == 64 || NumBaseBits == 32) && "Unsupported word size");
if (NumBaseBits == 64 && MaskWords >= 2) {
uint64_t M = Mask[0] | (uint64_t(Mask[1]) << 32);
if (InvertMask) M = ~M;