support user defined strategy

mindspore/ccsrc/frontend/parallel/auto_parallel/rec_core/rec_generate_strategy.cc

@@ -25,6 +25,7 @@
 #include "frontend/parallel/auto_parallel/rec_core/rec_partition.h"
 #include "frontend/parallel/ops_info/operator_info.h"
 #include "frontend/parallel/strategy.h"
+#include "frontend/parallel/step_parallel.h"
 
 namespace mindspore {
 namespace parallel {
@@ -43,6 +44,14 @@ void GenerateStrategy(const std::shared_ptr<Graph> &graph, const std::vector<std
   GenerateEliminatedOperatorStrategyForward(graph, ops, input_tensor_names, index_list, no_stra_op_list);
   GenerateEliminatedOperatorStrategyBackward(ops, input_tensor_names, no_stra_op_list);
   GenerateRemainingOperatorStrategy(graph, ops, input_tensor_names, index_list, no_stra_op_list);
+
+  for (auto &op : ops) {
+    auto attrs = op->attrs();
+    if (StrategyFound(attrs)) {
+      StrategyPtr user_defined_stra = parallel::ExtractStrategy(attrs);
+      op->SetSelectedStrategyAndCost(user_defined_stra, op->selected_cost());
+    }
+  }
 }
 
 Strategys PrepareMatMul(const std::shared_ptr<Graph> &graph, const std::vector<std::shared_ptr<OperatorInfo>> &ops,