!3614 Update Convert Switch to use PCNode

Merge pull request !3614 from Giancarlo/update_convert_sw

mindspore/ccsrc/frontend/optimizer/irpass/branch_culling.h

@@ -98,19 +98,12 @@ class ConvertSwitchReplacement : public OptimizerCaller {
       return nullptr;
     }
 
-    auto cnode_ = node->cast<CNodePtr>();
-    if (cnode_->size() < 1) {
-      return nullptr;
-    }
-
-    auto node_ = cnode_->input(0);
-
     PatternNode<AnfNodePtr> cond, true_br, false_br;
 
-    auto ConvertSwitchLambda = [&node_, &cond, &true_br, &false_br]() -> AnfNodePtr {
-      auto g1_ = GetValueNode<FuncGraphPtr>(true_br.GetNode(node_));
-      auto g2_ = GetValueNode<FuncGraphPtr>(false_br.GetNode(node_));
-      auto x_ = cond.GetNode(node_);
+    auto ConvertSwitchLambda = [&node, &cond, &true_br, &false_br]() -> AnfNodePtr {
+      auto g1_ = GetValueNode<FuncGraphPtr>(true_br.GetNode(node));
+      auto g2_ = GetValueNode<FuncGraphPtr>(false_br.GetNode(node));
+      auto x_ = cond.GetNode(node);
 
       // for switch replace method, only graphs without graph inside can be replaced
       for (auto &item : g1_->value_nodes()) {
@@ -133,7 +126,7 @@ class ConvertSwitchReplacement : public OptimizerCaller {
       auto trans_g2 = internal::TransformGraphCondFalseBranchNodes(g2_, x_);
 
       std::vector<AnfNodePtr> params;
-      auto fg = node_->func_graph();
+      auto fg = node->func_graph();
       auto cloned_g1 = InlineClone(trans_g1, fg, params);
       auto cloned_g2 = InlineClone(trans_g2, fg, params);
       auto nnode = internal::TransformMergeBranches(cloned_g1, cloned_g2, true_output, false_output, x_, fg);
@@ -142,8 +135,8 @@ class ConvertSwitchReplacement : public OptimizerCaller {
     };
 
     MATCH_REPLACE_LAMBDA_IF(
-      node_, PPrimitive(prim::kPrimSwitch, cond, true_br, false_br), ConvertSwitchLambda,
-      true_br.CheckFunc(IsValueNode<FuncGraph>, node_) && false_br.CheckFunc(IsValueNode<FuncGraph>, node_));
+      node, PCNode(PPrimitive(prim::kPrimSwitch, cond, true_br, false_br)).MinExtraNodes(0), ConvertSwitchLambda,
+      true_br.CheckFunc(IsValueNode<FuncGraph>, node) && false_br.CheckFunc(IsValueNode<FuncGraph>, node));
 
     return nullptr;
   }

mindspore/core/ir/pattern_matcher.h

@@ -443,7 +443,6 @@ class PConstant : public PBase<PConstant<T> > {
   }
 
   bool TryCapture_(const AnfNodePtr &node) const {
-    // if (IsValueNode<Value>(node)) {
     if (node->isa<ValueNode>()) {
       // If any_value_ is set don't check for the node's value. Just capture it.
       if (any_value_) {
@@ -726,7 +725,7 @@ class PConstant : public PBase<PConstant<T> > {
           ret = memcpy_s(data, mem_size, data_out, mem_size);
           delete[] reinterpret_cast<int *>(data_out);
         } else {
-          // Un-support data types
+          // Unsupported data types
           return nullptr;
         }
       }