diff options
Diffstat (limited to 'llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp')
| -rw-r--r-- | llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp b/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp index 73a07d56a41..59b0e625baf 100644 --- a/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp +++ b/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp @@ -2668,6 +2668,10 @@ static bool isVectorReductionOp(const User *I) { } unsigned ElemNum = Inst->getType()->getVectorNumElements(); + // Ensure the reduction size is a power of 2. + if (!isPowerOf2_32(ElemNum)) + return false; + unsigned ElemNumToReduce = ElemNum; // Do DFS search on the def-use chain from the given instruction. We only |
