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Shifting into the sign bit is UB as discussed on IRC. Explicitly use the
BitWord type for the constants to avoid this. llvm-svn: 205257
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@ -58,14 +58,14 @@ public:
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reference& operator=(bool t) {
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reference& operator=(bool t) {
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if (t)
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if (t)
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*WordRef |= 1L << BitPos;
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*WordRef |= BitWord(1) << BitPos;
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else
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else
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*WordRef &= ~(1L << BitPos);
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*WordRef &= ~(BitWord(1) << BitPos);
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return *this;
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return *this;
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}
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}
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operator bool() const {
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operator bool() const {
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return ((*WordRef) & (1L << BitPos)) ? true : false;
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return ((*WordRef) & (BitWord(1) << BitPos)) ? true : false;
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}
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}
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};
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};
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@ -238,7 +238,7 @@ public:
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}
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}
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BitVector &set(unsigned Idx) {
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BitVector &set(unsigned Idx) {
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Bits[Idx / BITWORD_SIZE] |= 1L << (Idx % BITWORD_SIZE);
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Bits[Idx / BITWORD_SIZE] |= BitWord(1) << (Idx % BITWORD_SIZE);
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return *this;
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return *this;
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}
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}
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@ -277,7 +277,7 @@ public:
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}
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}
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BitVector &reset(unsigned Idx) {
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BitVector &reset(unsigned Idx) {
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Bits[Idx / BITWORD_SIZE] &= ~(1L << (Idx % BITWORD_SIZE));
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Bits[Idx / BITWORD_SIZE] &= ~(BitWord(1) << (Idx % BITWORD_SIZE));
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return *this;
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return *this;
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}
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}
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@ -318,7 +318,7 @@ public:
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}
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}
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BitVector &flip(unsigned Idx) {
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BitVector &flip(unsigned Idx) {
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Bits[Idx / BITWORD_SIZE] ^= 1L << (Idx % BITWORD_SIZE);
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Bits[Idx / BITWORD_SIZE] ^= BitWord(1) << (Idx % BITWORD_SIZE);
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return *this;
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return *this;
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}
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}
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@ -330,7 +330,7 @@ public:
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bool operator[](unsigned Idx) const {
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bool operator[](unsigned Idx) const {
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assert (Idx < Size && "Out-of-bounds Bit access.");
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assert (Idx < Size && "Out-of-bounds Bit access.");
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BitWord Mask = 1L << (Idx % BITWORD_SIZE);
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BitWord Mask = BitWord(1) << (Idx % BITWORD_SIZE);
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return (Bits[Idx / BITWORD_SIZE] & Mask) != 0;
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return (Bits[Idx / BITWORD_SIZE] & Mask) != 0;
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}
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}
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