diff options
Diffstat (limited to 'llvm/lib')
| -rw-r--r-- | llvm/lib/Transforms/InstCombine/InstCombineCompares.cpp | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/llvm/lib/Transforms/InstCombine/InstCombineCompares.cpp b/llvm/lib/Transforms/InstCombine/InstCombineCompares.cpp index a04e56916f8..0cfd930003a 100644 --- a/llvm/lib/Transforms/InstCombine/InstCombineCompares.cpp +++ b/llvm/lib/Transforms/InstCombine/InstCombineCompares.cpp @@ -3110,6 +3110,10 @@ static Value *foldICmpWithLowBitMaskedVal(ICmpInst &I, // x s> x & (-1 >> y) -> x s> (-1 >> y) if (X != I.getOperand(0)) // X must be on LHS of comparison! return nullptr; // Ignore the other case. + if (!match(M, m_Constant())) // Can not do this fold with non-constant. + return nullptr; + if (!match(M, m_NonNegative())) // Must not have any -1 vector elements. + return nullptr; DstPred = ICmpInst::Predicate::ICMP_SGT; break; case ICmpInst::Predicate::ICMP_SGE: @@ -3136,6 +3140,10 @@ static Value *foldICmpWithLowBitMaskedVal(ICmpInst &I, // x s<= x & (-1 >> y) -> x s<= (-1 >> y) if (X != I.getOperand(0)) // X must be on LHS of comparison! return nullptr; // Ignore the other case. + if (!match(M, m_Constant())) // Can not do this fold with non-constant. + return nullptr; + if (!match(M, m_NonNegative())) // Must not have any -1 vector elements. + return nullptr; DstPred = ICmpInst::Predicate::ICMP_SLE; break; default: |
