!12643 Revert 'Pull Request !12569 : Add circle check in ub fusion'

From: @xsmq
Reviewed-by: @lilongfei15,@zhunaipan
Signed-off-by:

mindspore/ccsrc/backend/optimizer/ascend/buffer_fusion/ub_pattern_fusion.cc

@@ -27,7 +27,6 @@
 #include "base/core_ops.h"
 #include "runtime/device/kernel_info.h"
 #include "utils/ms_context.h"
-#include "backend/optimizer/common/helper.h"
 
 namespace mindspore {
 namespace opt {
@@ -354,24 +353,6 @@ void SetFusionOpRefInfos(session::KernelGraph *kernel_graph, const std::vector<A
     }
   }
 }
-
-void RemoveCircle(const session::KernelGraph &kernel_graph,
-                  std::unordered_map<int64_t, BufferFusionInfo_t> *buffer_fusion_infos) {
-  MS_EXCEPTION_IF_NULL(buffer_fusion_infos);
-  for (auto &[fusion_id, fusion_info] : *buffer_fusion_infos) {
-    bool has_circle = false;
-    for (auto &inp : fusion_info.inputs_list) {
-      if (IsDepend(kernel_graph, inp, fusion_info.anf_nodes)) {
-        has_circle = true;
-        break;
-      }
-    }
-
-    if (has_circle) {
-      buffer_fusion_infos->erase(fusion_id);
-    }
-  }
-}
 }  // namespace
 
 void UbPatternFusion::GetBufferFusionInfo(session::KernelGraph *kernel_graph,
@@ -380,9 +361,6 @@ void UbPatternFusion::GetBufferFusionInfo(session::KernelGraph *kernel_graph,
   GetFusionScopeComputeNodeList(kernel_graph, buffer_fusion_infos);
   GetFusionScopeInputNodeList(*kernel_graph, buffer_fusion_infos);
   GetFusionScopeOutputNodeList(kernel_graph, buffer_fusion_infos);
-  // Remove circle which will produce a circle if do fusion
-  RemoveCircle(*kernel_graph, buffer_fusion_infos);
-
   for (auto &buffer_fusion_info : *buffer_fusion_infos) {
     buffer_fusion_info.second.kernel_build_info =
       CreateFusionOpKernelInfo(buffer_fusion_info.second.inputs_list, buffer_fusion_info.second.outputs_list);

mindspore/ccsrc/backend/optimizer/common/helper.cc

@@ -49,6 +49,23 @@ std::vector<int64_t> Convert2Long(const std::vector<size_t> &v) {
 
 bool IsDepend(const FuncGraph &graph, const AnfNodePtr &node, const std::vector<AnfNodePtr> &nodes) {
   MS_EXCEPTION_IF_NULL(node);
+  std::vector<AnfNodePtr> node_list = TopoSort(graph.get_return());
+  std::map<AnfNodePtr, std::set<AnfNodePtr>> control_depend_map;
+  for (auto &nd : node_list) {
+    MS_EXCEPTION_IF_NULL(nd);
+    if (AnfAlgo::CheckPrimitiveType(nd, prim::kPrimControlDepend)) {
+      auto control_depend = nd->cast<CNodePtr>();
+      auto prior_node = control_depend->input(kControlDependPriorIndex);
+      auto behind_node = control_depend->input(kControlDependBehindIndex);
+      auto it = control_depend_map.find(behind_node);
+      if (it == control_depend_map.end()) {
+        control_depend_map[behind_node] = std::set<AnfNodePtr>{prior_node};
+      } else {
+        it->second.insert(prior_node);
+      }
+    }
+  }
+
   FuncGraphManagerPtr manager = graph.manager();
   MS_EXCEPTION_IF_NULL(manager);
 
@@ -71,6 +88,10 @@ bool IsDepend(const FuncGraph &graph, const AnfNodePtr &node, const std::vector<
       auto inputs = cnode->inputs();
       (void)todo.insert(todo.end(), inputs.begin(), inputs.end());
     }
+    auto it = control_depend_map.find(nd);
+    if (it != control_depend_map.end()) {
+      (void)todo.insert(todo.end(), it->second.begin(), it->second.end());
+    }
   }
   return false;
 }