From 065804d39e34090c772517540facb5f407850706 Mon Sep 17 00:00:00 2001
From: zhongpu <2013000149@qq.com>
Date: Mon, 4 Nov 2019 10:04:17 +0800
Subject: [PATCH] fix bug in grad_op compute for dygraph, test=develop (#20975)

---
 paddle/fluid/imperative/tracer.cc | 8 +-------
 1 file changed, 1 insertion(+), 7 deletions(-)

diff --git a/paddle/fluid/imperative/tracer.cc b/paddle/fluid/imperative/tracer.cc
index 7b160cd22b..c798720007 100644
--- a/paddle/fluid/imperative/tracer.cc
+++ b/paddle/fluid/imperative/tracer.cc
@@ -20,12 +20,6 @@
 namespace paddle {
 namespace imperative {
 
-struct OpBaseCmp {
-  bool operator()(OpBase* first, OpBase* second) {
-    return first->id() > second->id();
-  }
-};
-
 static std::vector<std::unique_ptr<OpBase>> CreateGradOpBases(
     const OpBase* fw_op_base, const NameVarBaseMap& in,
     const NameVarBaseMap& out) {
@@ -130,7 +124,7 @@ void Tracer::TraceBackward(const std::shared_ptr<OpBase>& fwd_op,
       }
     }
 
-    std::set<OpBase*, OpBaseCmp> visited_preceding_ops;
+    std::set<OpBase*> visited_preceding_ops;
     for (auto& grad_out_it : grad_out) {
       bool flag_clear_list = false;
       for (auto& var_base_it : grad_out_it.second) {
-- 
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