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[APInt] Remove unnecessary min with BitWidth from countTrailingOnesSlowCase.

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The unused upper bits are guaranteed to be 0 so we don't need to worry about accidentally counting them.

llvm-svn: 301091
This commit is contained in:
Craig Topper 2017-04-22 19:59:11 +00:00
parent 8f48b8e5d1
commit 0b06a173ec
1 changed files with 2 additions and 1 deletions
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3
lib/Support/APInt.cpp
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@ -688,7 +688,8 @@ unsigned APInt::countTrailingOnesSlowCase() const {
Count += APINT_BITS_PER_WORD;
if (i < getNumWords())
Count += llvm::countTrailingOnes(pVal[i]);
return std::min(Count, BitWidth);
assert(Count <= BitWidth);
return Count;
}
unsigned APInt::countPopulationSlowCase() const {