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| author | Benjamin Kramer <benny.kra@googlemail.com> | 2013-07-11 16:05:50 +0000 |
|---|---|---|
| committer | Benjamin Kramer <benny.kra@googlemail.com> | 2013-07-11 16:05:50 +0000 |
| commit | fc3ea6f4bcb227bf0b77c560b37210fd86d0cea3 (patch) | |
| tree | ea6c81c137585709ba62cda622e44f33409c33e1 /llvm/lib/Analysis/ScalarEvolution.cpp | |
| parent | ce2c84e6709898ecd2836462660fd573d271c255 (diff) | |
| download | bcm5719-llvm-fc3ea6f4bcb227bf0b77c560b37210fd86d0cea3.tar.gz bcm5719-llvm-fc3ea6f4bcb227bf0b77c560b37210fd86d0cea3.zip | |
Don't use a potentially expensive shift if all we want is one set bit.
No functionality change.
llvm-svn: 186095
Diffstat (limited to 'llvm/lib/Analysis/ScalarEvolution.cpp')
| -rw-r--r-- | llvm/lib/Analysis/ScalarEvolution.cpp | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/llvm/lib/Analysis/ScalarEvolution.cpp b/llvm/lib/Analysis/ScalarEvolution.cpp index af5051650ee..1d5e5fb7195 100644 --- a/llvm/lib/Analysis/ScalarEvolution.cpp +++ b/llvm/lib/Analysis/ScalarEvolution.cpp @@ -758,7 +758,7 @@ static const SCEV *BinomialCoefficient(const SCEV *It, unsigned K, unsigned CalculationBits = W + T; // Calculate 2^T, at width T+W. - APInt DivFactor = APInt(CalculationBits, 1).shl(T); + APInt DivFactor = APInt::getOneBitSet(CalculationBits, T); // Calculate the multiplicative inverse of K! / 2^T; // this multiplication factor will perform the exact division by @@ -3789,7 +3789,7 @@ const SCEV *ScalarEvolution::createSCEV(Value *V) { break; Constant *X = ConstantInt::get(getContext(), - APInt(BitWidth, 1).shl(SA->getZExtValue())); + APInt::getOneBitSet(BitWidth, SA->getZExtValue())); return getMulExpr(getSCEV(U->getOperand(0)), getSCEV(X)); } break; @@ -3807,7 +3807,7 @@ const SCEV *ScalarEvolution::createSCEV(Value *V) { break; Constant *X = ConstantInt::get(getContext(), - APInt(BitWidth, 1).shl(SA->getZExtValue())); + APInt::getOneBitSet(BitWidth, SA->getZExtValue())); return getUDivExpr(getSCEV(U->getOperand(0)), getSCEV(X)); } break; |
