diff options
Diffstat (limited to 'llvm/lib/Transforms')
| -rw-r--r-- | llvm/lib/Transforms/Scalar/LoopStrengthReduce.cpp | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/llvm/lib/Transforms/Scalar/LoopStrengthReduce.cpp b/llvm/lib/Transforms/Scalar/LoopStrengthReduce.cpp index fbc8e0e1e7b..e1d18e8f99b 100644 --- a/llvm/lib/Transforms/Scalar/LoopStrengthReduce.cpp +++ b/llvm/lib/Transforms/Scalar/LoopStrengthReduce.cpp @@ -3117,10 +3117,15 @@ void LSRInstance::CollectLoopInvariantFixupsAndFormulae() { SmallVector<const SCEV *, 8> Worklist(RegUses.begin(), RegUses.end()); SmallPtrSet<const SCEV *, 8> Inserted; + SmallPtrSet<const SCEV *, 32> Done; while (!Worklist.empty()) { const SCEV *S = Worklist.pop_back_val(); + // Don't process the same SCEV twice + if (!Done.insert(S)) + continue; + if (const SCEVNAryExpr *N = dyn_cast<SCEVNAryExpr>(S)) Worklist.append(N->op_begin(), N->op_end()); else if (const SCEVCastExpr *C = dyn_cast<SCEVCastExpr>(S)) |
