[llvm] [DA] Require `nsw` for AddRecs involved in GCD test (PR #186892)

[Ehsan Amiri via llvm-commits]

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@@ -2099,6 +2099,8 @@ static const SCEV *analyzeCoefficientsForGCD(const SCEV *Coefficients,
   while (const SCEVAddRecExpr *AddRec =
              dyn_cast<SCEVAddRecExpr>(Coefficients)) {
     const SCEV *Coeff = AddRec->getStepRecurrence(*SE);
+    if (!AddRec->hasNoSignedWrap())
+      return nullptr;
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amehsan wrote:

going to move this code one above the previous line

https://github.com/llvm/llvm-project/pull/186892