From ebc6959c9becf0bf0eab6eb260da45b96afc80ea Mon Sep 17 00:00:00 2001
From: wangxinxin08 <69842442+wangxinxin08@users.noreply.github.com>
Date: Wed, 2 Mar 2022 19:35:10 +0800
Subject: [PATCH] modify infershape of yolo_box (#40056)

* modify infershape of yolo_box
---
 paddle/fluid/operators/detection/yolo_box_op.cc | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/paddle/fluid/operators/detection/yolo_box_op.cc b/paddle/fluid/operators/detection/yolo_box_op.cc
index 48b0d511d9..511d8e0eed 100644
--- a/paddle/fluid/operators/detection/yolo_box_op.cc
+++ b/paddle/fluid/operators/detection/yolo_box_op.cc
@@ -102,7 +102,12 @@ class YoloBoxOp : public framework::OperatorWithKernel {
                           "But received class_num (%s)",
                           class_num));
 
-    int box_num = dim_x[2] * dim_x[3] * anchor_num;
+    int box_num;
+    if ((dim_x[2] > 0 && dim_x[3] > 0) || ctx->IsRuntime()) {
+      box_num = dim_x[2] * dim_x[3] * anchor_num;
+    } else {
+      box_num = -1;
+    }
     std::vector<int64_t> dim_boxes({dim_x[0], box_num, 4});
     ctx->SetOutputDim("Boxes", phi::make_ddim(dim_boxes));
 
-- 
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