diff options
Diffstat (limited to 'llvm/lib/Analysis/ValueTracking.cpp')
| -rw-r--r-- | llvm/lib/Analysis/ValueTracking.cpp | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/llvm/lib/Analysis/ValueTracking.cpp b/llvm/lib/Analysis/ValueTracking.cpp index 7cb8c8d8aae..b065f427b06 100644 --- a/llvm/lib/Analysis/ValueTracking.cpp +++ b/llvm/lib/Analysis/ValueTracking.cpp @@ -852,7 +852,8 @@ static void computeKnownBitsFromShiftOperator( Optional<bool> ShifterOperandIsNonZero; // Early exit if we can't constrain any well-defined shift amount. - if (!(ShiftAmtKZ & (BitWidth - 1)) && !(ShiftAmtKO & (BitWidth - 1))) { + if (!(ShiftAmtKZ & (PowerOf2Ceil(BitWidth) - 1)) && + !(ShiftAmtKO & (PowerOf2Ceil(BitWidth) - 1))) { ShifterOperandIsNonZero = isKnownNonZero(I->getOperand(1), Depth + 1, Q); if (!*ShifterOperandIsNonZero) |
