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Process the step before the start, because it's usually the simpler
of the two. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111495 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -441,12 +441,12 @@ static const SCEV *getExactSDiv(const SCEV *LHS, const SCEV *RHS,
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// Distribute the sdiv over addrec operands, if the addrec doesn't overflow.
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if (const SCEVAddRecExpr *AR = dyn_cast<SCEVAddRecExpr>(LHS)) {
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if (IgnoreSignificantBits || isAddRecSExtable(AR, SE)) {
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const SCEV *Start = getExactSDiv(AR->getStart(), RHS, SE,
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IgnoreSignificantBits);
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if (!Start) return 0;
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const SCEV *Step = getExactSDiv(AR->getStepRecurrence(SE), RHS, SE,
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IgnoreSignificantBits);
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if (!Step) return 0;
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const SCEV *Start = getExactSDiv(AR->getStart(), RHS, SE,
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IgnoreSignificantBits);
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if (!Start) return 0;
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return SE.getAddRecExpr(Start, Step, AR->getLoop());
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}
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return 0;
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