fix

test=develop

paddle/fluid/framework/details/memory_optimize_pass.cc

@@ -337,4 +337,4 @@ void MemoryOptimizePass::RenameVarInGraphNode(const std::string& var,
 
 REGISTER_PASS(memory_optimize_pass,
               paddle::framework::details::MemoryOptimizePass)
-    .RequireGraphAttr(paddle::framework::details::kAllOpDescs);
+    .RequireGraphAttr(paddle::framework::details::kStaleProgramOpDescs);

paddle/fluid/framework/ir/graph.h

@@ -195,6 +195,12 @@ class Graph {
     return nullptr;
   }
 
+  // Returns reference to the original program.
+  // WARN: After a series of passes, the current graph can be quite
+  // different from OriginProgram. Caller shouldn't assume much from
+  // the returned OriginProgram.
+  const ProgramDesc &OriginProgram() const { return program_; }
+
   // This method takes ownership of `node`.
   ir::Node *AddNode(ir::Node *node) {
     PADDLE_ENFORCE(node_set_.find(node) == node_set_.end());