[DAG] Remove pointless std::function wrapper, NFC

diff --git a/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp b/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
index 8fd0001..b316967 100644 (file)
--- a/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
@@ -23962,7 +23962,7 @@ void DAGCombiner::GatherAllAliases(SDNode *N, SDValue OriginalChain,
   unsigned Depth = 0;
 
   // Attempt to improve chain by a single step
-  std::function<bool(SDValue &)> ImproveChain = [&](SDValue &C) -> bool {
+  auto ImproveChain = [&](SDValue &C) -> bool {
     switch (C.getOpcode()) {
     case ISD::EntryToken:
       // No need to mark EntryToken.