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Check Affine AR only. #144550

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4 changes: 1 addition & 3 deletions llvm/lib/Analysis/ScalarEvolution.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -10894,9 +10894,7 @@ bool ScalarEvolution::SimplifyICmpOperands(CmpPredicate &Pred, const SCEV *&LHS,
case ICmpInst::ICMP_UGE:
// If RHS is an op we can fold the -1, try that first.
// Otherwise prefer LHS to preserve the nuw flag.
if ((isa<SCEVConstant>(RHS) ||
(isa<SCEVAddExpr, SCEVAddRecExpr>(RHS) &&
isa<SCEVConstant>(cast<SCEVNAryExpr>(RHS)->getOperand(0)))) &&
if ((isa<SCEVConstant>(RHS) || match(RHS, m_scev_AffineAddRec(m_SCEVConstant(), m_SCEV(), m_Loop()))) &&
!getUnsignedRangeMin(RHS).isMinValue()) {
RHS = getAddExpr(getConstant(RHS->getType(), (uint64_t)-1, true), RHS);
Pred = ICmpInst::ICMP_UGT;
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