- SmallVector<const SCEV *, 3> AddRecOps;
- AddRecOps.push_back(NewStart);
- AddRecOps.push_back(NewStep);
- AddRecOps.push_back(NewSecondOrderStep);
- const SCEV *NewAddRec = getAddRecExpr(AddRecOps,
- AddRec->getLoop(),
- SCEV::FlagAnyWrap);
- if (Ops.size() == 2) return NewAddRec;
- Ops[Idx] = AddRec = cast<SCEVAddRecExpr>(NewAddRec);
- Ops.erase(Ops.begin() + OtherIdx); --OtherIdx;
+ // This can happen when AddRec or OtherAddRec have >3 operands.
+ // TODO: support these add-recs.
+ if (isLoopInvariant(NewStart, AddRecLoop) &&
+ isLoopInvariant(NewStep, AddRecLoop) &&
+ isLoopInvariant(NewSecondOrderStep, AddRecLoop)) {
+ SmallVector<const SCEV *, 3> AddRecOps;
+ AddRecOps.push_back(NewStart);
+ AddRecOps.push_back(NewStep);
+ AddRecOps.push_back(NewSecondOrderStep);
+ const SCEV *NewAddRec = getAddRecExpr(AddRecOps,
+ AddRec->getLoop(),
+ SCEV::FlagAnyWrap);
+ if (Ops.size() == 2) return NewAddRec;
+ Ops[Idx] = AddRec = cast<SCEVAddRecExpr>(NewAddRec);
+ Ops.erase(Ops.begin() + OtherIdx); --OtherIdx;
+ Retry = true;
+ }