fix fusion_lstm unique_name bug

Author: luotao1

paddle/fluid/framework/ir/fc_lstm_fuse_pass.cc

@@ -51,7 +51,7 @@ int BuildFusion(Graph* graph, const std::string& name_scope, Scope* scope,
     if (with_fc_bias) {
       // Add FC-bias with LSTM-bias and create a new weight
       PADDLE_ENFORCE(scope);
-      const std::string& new_bias_var = name_scope + "_bias.new";
+      const std::string& new_bias_var = patterns::UniqueKey("NewBias");
       auto* bias_var = scope->Var(new_bias_var);
       PADDLE_ENFORCE(bias_var);
       auto* bias_tensor = bias_var->GetMutable<framework::LoDTensor>();
@@ -120,7 +120,6 @@ int BuildFusion(Graph* graph, const std::string& name_scope, Scope* scope,
 
   auto handler = [&](const GraphPatternDetector::subgraph_t& subgraph,
                      Graph* g) {
-
     GET_IR_NODE_FROM_SUBGRAPH(lstm, lstm, lstm_pattern);
     GET_IR_NODE_FROM_SUBGRAPH(Weight, Weight, lstm_pattern);
     GET_IR_NODE_FROM_SUBGRAPH(Bias, Bias, lstm_pattern);
@@ -136,7 +135,7 @@ int BuildFusion(Graph* graph, const std::string& name_scope, Scope* scope,
                    fc_bias);
       // Remove unneeded nodes.
       std::unordered_set<const Node*> marked_nodes(
-          {mul, lstm, elementwise_add});
+          {mul, lstm, elementwise_add, fc_bias});
       GraphSafeRemoveNodes(graph, marked_nodes);
     } else {
       GET_IR_NODE_FROM_SUBGRAPH(fc_out, mul_out, fc_pattern);

paddle/fluid/inference/analysis/ir_pass_manager.cc

@@ -14,6 +14,7 @@
 
 #include "paddle/fluid/inference/analysis/ir_pass_manager.h"
 #include <string>
+#include <vector>
 #include "paddle/fluid/framework/ir/fuse_pass_base.h"
 #include "paddle/fluid/framework/ir/graph.h"
 #include "paddle/fluid/framework/scope.h"
@@ -37,13 +38,16 @@ IRPassManager::IRPassManager(const ProgramDesc &program,
 void IRPassManager::Apply(const std::vector<std::string> &passes) {
   // Apply all the passes
   std::string pre_pass;
+  int pass_num = 0;
   for (const std::string &pass_name : passes) {
     PrettyLogEndl(Style::H2(), "--- Running IR pass [%s]", pass_name);
     auto pass = framework::ir::PassRegistry::Instance().Get(pass_name);
     if (pass_name == "graph_viz_pass") {
-      std::string dot_file_path =
-          "ir_" + (pre_pass.empty() ? "origin" : pre_pass) + ".dot";
+      std::string dot_file_path = std::to_string(pass_num) + "_ir_" +
+                                  (pre_pass.empty() ? "origin" : pre_pass) +
+                                  ".dot";
       pass->Set("graph_viz_path", new std::string(std::move(dot_file_path)));
+      pass_num++;
     }
     graph_ = pass->Apply(std::move(graph_));
     pre_pass = pass_name;