diff options
Diffstat (limited to 'lib/Transforms/InstCombine/InstCombineCalls.cpp')
| -rw-r--r-- | lib/Transforms/InstCombine/InstCombineCalls.cpp | 16 |
1 files changed, 6 insertions, 10 deletions
diff --git a/lib/Transforms/InstCombine/InstCombineCalls.cpp b/lib/Transforms/InstCombine/InstCombineCalls.cpp index b550fe83eb..77e4727100 100644 --- a/lib/Transforms/InstCombine/InstCombineCalls.cpp +++ b/lib/Transforms/InstCombine/InstCombineCalls.cpp @@ -361,8 +361,7 @@ Instruction *InstCombiner::visitCallInst(CallInst &CI) { uint32_t BitWidth = IT->getBitWidth(); APInt KnownZero(BitWidth, 0); APInt KnownOne(BitWidth, 0); - ComputeMaskedBits(II->getArgOperand(0), APInt::getAllOnesValue(BitWidth), - KnownZero, KnownOne); + ComputeMaskedBits(II->getArgOperand(0), KnownZero, KnownOne); unsigned TrailingZeros = KnownOne.countTrailingZeros(); APInt Mask(APInt::getLowBitsSet(BitWidth, TrailingZeros)); if ((Mask & KnownZero) == Mask) @@ -380,8 +379,7 @@ Instruction *InstCombiner::visitCallInst(CallInst &CI) { uint32_t BitWidth = IT->getBitWidth(); APInt KnownZero(BitWidth, 0); APInt KnownOne(BitWidth, 0); - ComputeMaskedBits(II->getArgOperand(0), APInt::getAllOnesValue(BitWidth), - KnownZero, KnownOne); + ComputeMaskedBits(II->getArgOperand(0), KnownZero, KnownOne); unsigned LeadingZeros = KnownOne.countLeadingZeros(); APInt Mask(APInt::getHighBitsSet(BitWidth, LeadingZeros)); if ((Mask & KnownZero) == Mask) @@ -394,17 +392,16 @@ Instruction *InstCombiner::visitCallInst(CallInst &CI) { Value *LHS = II->getArgOperand(0), *RHS = II->getArgOperand(1); IntegerType *IT = cast<IntegerType>(II->getArgOperand(0)->getType()); uint32_t BitWidth = IT->getBitWidth(); - APInt Mask = APInt::getSignBit(BitWidth); APInt LHSKnownZero(BitWidth, 0); APInt LHSKnownOne(BitWidth, 0); - ComputeMaskedBits(LHS, Mask, LHSKnownZero, LHSKnownOne); + ComputeMaskedBits(LHS, LHSKnownZero, LHSKnownOne); bool LHSKnownNegative = LHSKnownOne[BitWidth - 1]; bool LHSKnownPositive = LHSKnownZero[BitWidth - 1]; if (LHSKnownNegative || LHSKnownPositive) { APInt RHSKnownZero(BitWidth, 0); APInt RHSKnownOne(BitWidth, 0); - ComputeMaskedBits(RHS, Mask, RHSKnownZero, RHSKnownOne); + ComputeMaskedBits(RHS, RHSKnownZero, RHSKnownOne); bool RHSKnownNegative = RHSKnownOne[BitWidth - 1]; bool RHSKnownPositive = RHSKnownZero[BitWidth - 1]; if (LHSKnownNegative && RHSKnownNegative) { @@ -488,14 +485,13 @@ Instruction *InstCombiner::visitCallInst(CallInst &CI) { case Intrinsic::umul_with_overflow: { Value *LHS = II->getArgOperand(0), *RHS = II->getArgOperand(1); unsigned BitWidth = cast<IntegerType>(LHS->getType())->getBitWidth(); - APInt Mask = APInt::getAllOnesValue(BitWidth); APInt LHSKnownZero(BitWidth, 0); APInt LHSKnownOne(BitWidth, 0); - ComputeMaskedBits(LHS, Mask, LHSKnownZero, LHSKnownOne); + ComputeMaskedBits(LHS, LHSKnownZero, LHSKnownOne); APInt RHSKnownZero(BitWidth, 0); APInt RHSKnownOne(BitWidth, 0); - ComputeMaskedBits(RHS, Mask, RHSKnownZero, RHSKnownOne); + ComputeMaskedBits(RHS, RHSKnownZero, RHSKnownOne); // Get the largest possible values for each operand. APInt LHSMax = ~LHSKnownZero; |