divide by the result of the gcd

used to fail with 'Step should divide Start with no remainder.'

llvm-svn: 205802

llvm/lib/Analysis/ScalarEvolution.cpp

@@ -7138,7 +7138,7 @@ public:
         const SCEV *Res = SCEVGCD::findGCD(SE, Expr->getOperand(i), GCD, &Rem);
         if (Rem == Zero) {
           PartialGCD = SE.getMulExpr(PartialGCD, Res);
-          Operands.push_back(divide(SE, Expr->getOperand(i), GCD));
+          Operands.push_back(divide(SE, Expr->getOperand(i), Res));
         } else {
           Operands.push_back(Expr->getOperand(i));
         }