diff options
Diffstat (limited to 'llvm/lib/CodeGen')
| -rw-r--r-- | llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp b/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp index b07bed9f736..eb98f75b9fa 100644 --- a/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp +++ b/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp @@ -1859,8 +1859,11 @@ SDValue DAGCombiner::visitMERGE_VALUES(SDNode *N) { // can be tried again once they have new operands. AddUsersToWorklist(N); do { + // Do as a single replacement to avoid rewalking use lists. + SmallVector<SDValue, 8> Ops; for (unsigned i = 0, e = N->getNumOperands(); i != e; ++i) - DAG.ReplaceAllUsesOfValueWith(SDValue(N, i), N->getOperand(i)); + Ops.push_back(N->getOperand(i)); + DAG.ReplaceAllUsesWith(N, Ops.data()); } while (!N->use_empty()); deleteAndRecombine(N); return SDValue(N, 0); // Return N so it doesn't get rechecked! |
