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Fix APInt::countTrailingZeros to return BitWidth if the input is zero instead of returning some random large number. 

llvm-svn: 44294
This commit is contained in:
Chris Lattner 2007-11-23 22:36:25 +00:00
parent 0cf083815a
commit c2c4c7456c
1 changed files with 2 additions and 2 deletions
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4
llvm/lib/Support/APInt.cpp
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@ -782,14 +782,14 @@ uint32_t APInt::countLeadingOnes() const {
uint32_t APInt::countTrailingZeros() const {
if (isSingleWord())
return CountTrailingZeros_64(VAL);
return std::min(CountTrailingZeros_64(VAL), BitWidth);
uint32_t Count = 0;
uint32_t i = 0;
for (; i < getNumWords() && pVal[i] == 0; ++i)
Count += APINT_BITS_PER_WORD;
if (i < getNumWords())
Count += CountTrailingZeros_64(pVal[i]);
return Count;
return std::min(Count, BitWidth);
}
uint32_t APInt::countPopulation() const {