Merge pull request #14717 from panyx0718/infer

fix a const_cast and avoid using stale program.

paddle/fluid/framework/ir/graph.h

@@ -177,14 +177,13 @@ class Graph {
     return nullptr;
   }
 
-  const ProgramDesc &program() const { return program_; }
-  std::map<std::string, std::vector<ir::Node *>> InitFromProgram(
-      const ProgramDesc &program);
-
   void ResolveHazard(
       const std::map<std::string, std::vector<ir::Node *>> &var_nodes);
 
  private:
+  std::map<std::string, std::vector<ir::Node *>> InitFromProgram(
+      const ProgramDesc &program);
+
   // This method takes ownership of `node`.
   ir::Node *AddNode(ir::Node *node) {
     PADDLE_ENFORCE(node_set_.find(node) == node_set_.end());

paddle/fluid/inference/analysis/ir_passes/tensorrt_subgraph_pass.cc

@@ -178,11 +178,12 @@ void TensorRtSubgraphPass::CreateTensorRTOp(framework::ir::Node *node,
     output_mapping.push_back(output_name_map[name]);
   }
 
-  *block_desc.Proto()->mutable_vars() =
-      const_cast<framework::ProgramDesc *>(&graph->program())
-          ->Proto()
-          ->blocks(0)
-          .vars();
+  auto *vars = block_desc.Proto()->mutable_vars();
+  for (framework::ir::Node *node : graph->Nodes()) {
+    if (node->IsVar() && node->Var()) {
+      *vars->Add() = *node->Var()->Proto();
+    }
+  }
   PADDLE_ENFORCE(!block_desc.Proto()->vars().empty(),
                  "the block has no var-desc");
   PADDLE_ENFORCE(!output_mapping.empty());