diff options
Diffstat (limited to 'lib/Analysis/ScalarEvolution.cpp')
| -rw-r--r-- | lib/Analysis/ScalarEvolution.cpp | 9 |
1 files changed, 3 insertions, 6 deletions
diff --git a/lib/Analysis/ScalarEvolution.cpp b/lib/Analysis/ScalarEvolution.cpp index 8b5397946e..205227ca0b 100644 --- a/lib/Analysis/ScalarEvolution.cpp +++ b/lib/Analysis/ScalarEvolution.cpp @@ -3261,9 +3261,8 @@ ScalarEvolution::GetMinTrailingZeros(const SCEV *S) { if (const SCEVUnknown *U = dyn_cast<SCEVUnknown>(S)) { // For a SCEVUnknown, ask ValueTracking. unsigned BitWidth = getTypeSizeInBits(U->getType()); - APInt Mask = APInt::getAllOnesValue(BitWidth); APInt Zeros(BitWidth, 0), Ones(BitWidth, 0); - ComputeMaskedBits(U->getValue(), Mask, Zeros, Ones); + ComputeMaskedBits(U->getValue(), Zeros, Ones); return Zeros.countTrailingOnes(); } @@ -3401,9 +3400,8 @@ ScalarEvolution::getUnsignedRange(const SCEV *S) { if (const SCEVUnknown *U = dyn_cast<SCEVUnknown>(S)) { // For a SCEVUnknown, ask ValueTracking. - APInt Mask = APInt::getAllOnesValue(BitWidth); APInt Zeros(BitWidth, 0), Ones(BitWidth, 0); - ComputeMaskedBits(U->getValue(), Mask, Zeros, Ones, TD); + ComputeMaskedBits(U->getValue(), Zeros, Ones, TD); if (Ones == ~Zeros + 1) return setUnsignedRange(U, ConservativeResult); return setUnsignedRange(U, @@ -3660,9 +3658,8 @@ const SCEV *ScalarEvolution::createSCEV(Value *V) { // knew about to reconstruct a low-bits mask value. unsigned LZ = A.countLeadingZeros(); unsigned BitWidth = A.getBitWidth(); - APInt AllOnes = APInt::getAllOnesValue(BitWidth); APInt KnownZero(BitWidth, 0), KnownOne(BitWidth, 0); - ComputeMaskedBits(U->getOperand(0), AllOnes, KnownZero, KnownOne, TD); + ComputeMaskedBits(U->getOperand(0), KnownZero, KnownOne, TD); APInt EffectiveMask = APInt::getLowBitsSet(BitWidth, BitWidth - LZ); |