diff options
Diffstat (limited to 'llvm/lib/Transforms/InstCombine/InstCombineMulDivRem.cpp')
| -rw-r--r-- | llvm/lib/Transforms/InstCombine/InstCombineMulDivRem.cpp | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/llvm/lib/Transforms/InstCombine/InstCombineMulDivRem.cpp b/llvm/lib/Transforms/InstCombine/InstCombineMulDivRem.cpp index 8d004f2a0a2..b09198afff2 100644 --- a/llvm/lib/Transforms/InstCombine/InstCombineMulDivRem.cpp +++ b/llvm/lib/Transforms/InstCombine/InstCombineMulDivRem.cpp @@ -762,7 +762,8 @@ Instruction *InstCombiner::commonIDivTransforms(BinaryOperator &I) { } } - if ((IsSigned && match(LHS, m_NSWShl(m_Value(X), m_APInt(C1)))) || + if ((IsSigned && match(LHS, m_NSWShl(m_Value(X), m_APInt(C1))) && + *C1 != C1->getBitWidth() - 1) || (!IsSigned && match(LHS, m_NUWShl(m_Value(X), m_APInt(C1))))) { APInt Quotient(C1->getBitWidth(), /*Val=*/0ULL, IsSigned); APInt C1Shifted = APInt::getOneBitSet( |
