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make operator== work with non-equal sized bitvectors, as long as
the extra bits are all zeros. This allows "010" and "010000" to be treated as equal. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42889 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -259,12 +259,23 @@ public:
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// Comparison operators.
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bool operator==(const BitVector &RHS) const {
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if (Size != RHS.Size)
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return false;
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for (unsigned i = 0; i < NumBitWords(size()); ++i)
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unsigned ThisWords = NumBitWords(size());
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unsigned RHSWords = NumBitWords(RHS.size());
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unsigned i;
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for (i = 0; i != std::min(ThisWords, RHSWords); ++i)
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if (Bits[i] != RHS.Bits[i])
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return false;
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// Verify that any extra words are all zeros.
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if (i != ThisWords) {
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for (; i != ThisWords; ++i)
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if (Bits[i])
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return false;
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} else if (i != RHSWords) {
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for (; i != RHSWords; ++i)
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if (RHS.Bits[i])
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return false;
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}
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return true;
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}
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