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Fix for PR9633 [indvars] Assertion `isa<X>(Val) && "cast<Ty>() argument of incompatible type!"' failed.
Added a type check in ScalarEvolution::computeSCEVAtScope to handle the case in which operands of an AddRecExpr in the current scope are folded. llvm-svn: 130271
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@ -4701,9 +4701,14 @@ const SCEV *ScalarEvolution::computeSCEVAtScope(const SCEV *V, const Loop *L) {
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for (++i; i != e; ++i)
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NewOps.push_back(getSCEVAtScope(AddRec->getOperand(i), L));
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AddRec = cast<SCEVAddRecExpr>(
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const SCEV *FoldedRec =
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getAddRecExpr(NewOps, AddRec->getLoop(),
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AddRec->getNoWrapFlags(SCEV::FlagNW)));
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AddRec->getNoWrapFlags(SCEV::FlagNW));
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AddRec = dyn_cast<SCEVAddRecExpr>(FoldedRec);
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// In cases with "undef" values, a loop's own recurrence may
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// fold into a constant. Go ahead and return the optimistic value.
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if (!AddRec)
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return FoldedRec;
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break;
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}
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