diff options
Diffstat (limited to 'lib/Transforms/Scalar/LoopStrengthReduce.cpp')
| -rw-r--r-- | lib/Transforms/Scalar/LoopStrengthReduce.cpp | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/lib/Transforms/Scalar/LoopStrengthReduce.cpp b/lib/Transforms/Scalar/LoopStrengthReduce.cpp index a09bca8997..a09b3dc5f8 100644 --- a/lib/Transforms/Scalar/LoopStrengthReduce.cpp +++ b/lib/Transforms/Scalar/LoopStrengthReduce.cpp @@ -2060,8 +2060,11 @@ void LSRInstance::GenerateReassociations(LSRUse &LU, unsigned LUIdx, LU.Kind, LU.AccessTy, TLI, SE)) continue; + const SCEV *InnerSum = SE.getAddExpr(InnerAddOps); + if (InnerSum->isZero()) + continue; Formula F = Base; - F.BaseRegs[i] = SE.getAddExpr(InnerAddOps); + F.BaseRegs[i] = InnerSum; F.BaseRegs.push_back(*J); if (InsertFormula(LU, LUIdx, F)) // If that formula hadn't been seen before, recurse to find more like |