diff options
Diffstat (limited to 'llvm/lib')
| -rw-r--r-- | llvm/lib/Analysis/ValueTracking.cpp | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/llvm/lib/Analysis/ValueTracking.cpp b/llvm/lib/Analysis/ValueTracking.cpp index b35e2074acb..745e5fe99cc 100644 --- a/llvm/lib/Analysis/ValueTracking.cpp +++ b/llvm/lib/Analysis/ValueTracking.cpp @@ -723,17 +723,17 @@ void llvm::ComputeMaskedBits(Value *V, const APInt &Mask, // If this call is undefined for 0, the result will be less than 2^n. if (II->getArgOperand(1) == ConstantInt::getTrue(II->getContext())) LowBits -= 1; - KnownZero = APInt::getHighBitsSet(BitWidth, BitWidth - LowBits); + KnownZero = Mask & APInt::getHighBitsSet(BitWidth, BitWidth - LowBits); break; } case Intrinsic::ctpop: { unsigned LowBits = Log2_32(BitWidth)+1; - KnownZero = APInt::getHighBitsSet(BitWidth, BitWidth - LowBits); + KnownZero = Mask & APInt::getHighBitsSet(BitWidth, BitWidth - LowBits); break; } case Intrinsic::x86_sse42_crc32_64_8: case Intrinsic::x86_sse42_crc32_64_64: - KnownZero = APInt::getHighBitsSet(64, 32); + KnownZero = Mask & APInt::getHighBitsSet(64, 32); break; } } |
