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Fix countLeadingZeros in the case that the bitwidth evenly divides the

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word size. This fixes all reads of uninitialized data (buffer over read)
and makes APInt.cpp memory clean, per valgrind. The only remaining
problem is division in a few cases.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34483 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Reid Spencer 2007-02-22 00:22:00 +00:00
parent 62819f3144
commit ab2b2c827c
1 changed files with 4 additions and 1 deletions
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5
lib/Support/APInt.cpp
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@ -726,7 +726,10 @@ uint32_t APInt::countLeadingZeros() const {
}
}
}
return Count - (APINT_BITS_PER_WORD - (BitWidth % APINT_BITS_PER_WORD));
uint32_t remainder = BitWidth % APINT_BITS_PER_WORD;
if (remainder)
Count -= APINT_BITS_PER_WORD - remainder;
return Count;
}
/// countTrailingZeros - This function is a APInt version corresponding to