diff options
| -rw-r--r-- | lib/Transforms/Scalar/LoopStrengthReduce.cpp | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/lib/Transforms/Scalar/LoopStrengthReduce.cpp b/lib/Transforms/Scalar/LoopStrengthReduce.cpp index e50b13d63d..4669b60e8d 100644 --- a/lib/Transforms/Scalar/LoopStrengthReduce.cpp +++ b/lib/Transforms/Scalar/LoopStrengthReduce.cpp @@ -262,11 +262,15 @@ void Formula::InitialMatch(const SCEV *S, Loop *L, SmallVector<const SCEV *, 4> Bad; DoInitialMatch(S, L, Good, Bad, SE, DT); if (!Good.empty()) { - BaseRegs.push_back(SE.getAddExpr(Good)); + const SCEV *Sum = SE.getAddExpr(Good); + if (!Sum->isZero()) + BaseRegs.push_back(Sum); AM.HasBaseReg = true; } if (!Bad.empty()) { - BaseRegs.push_back(SE.getAddExpr(Bad)); + const SCEV *Sum = SE.getAddExpr(Bad); + if (!Sum->isZero()) + BaseRegs.push_back(Sum); AM.HasBaseReg = true; } } |