From 2a42a73db1ff32f7d1b9dfc772070fc7827aa4e7 Mon Sep 17 00:00:00 2001
From: zchen0211 <chenzhuoyuan07@gmail.com>
Date: Fri, 11 Aug 2017 15:10:59 -0700
Subject: [PATCH] modify gather_op with test

---
 paddle/operators/gather_op.cc | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/paddle/operators/gather_op.cc b/paddle/operators/gather_op.cc
index 3414a3c2633..5a4f889f3d8 100644
--- a/paddle/operators/gather_op.cc
+++ b/paddle/operators/gather_op.cc
@@ -27,6 +27,9 @@ class GatherOp : public framework::OperatorWithKernel {
                             "Inputs of GatherOp must all be set");
     int batch_size = ctx.Input<Tensor>(1)->dims()[0];
     PADDLE_ENFORCE(batch_size > 0);
+    paddle::framework::DDim output_dims(ctx.Input<Tensor>(0)->dims());
+    output_dims[0] = batch_size;
+    ctx.Output<Tensor>(0)->Resize(output_dims);
   }
 };
 
@@ -48,8 +51,8 @@ Y = X[Index]
 class GatherGradOp : public framework::OperatorWithKernel {
  protected:
   void InferShape(const framework::InferShapeContext &ctx) const override {
-    // ctx.Output<Tensor>("X" + framework::kGradVarSuffix)
-    //    ->Resize(ctx.Input<Tensor>("X")->dims());
+    ctx.Output<Tensor>("X" + framework::kGradVarSuffix)
+        ->Resize(ctx.Input<Tensor>("X")->dims());
   }
 };
 
-- 
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