From b1fc23869417d3bf6c1f647042c8ecfea58043b4 Mon Sep 17 00:00:00 2001
From: guochaorong <guochaorong@baidu.com>
Date: Thu, 23 Aug 2018 22:36:53 +0800
Subject: [PATCH] Revert "Disable in_place in batch_norm API. (#12736)"

This reverts commit f5d5d7b2d989e8aa5b5e637fd04318566b23f2fe.
---
 paddle/fluid/operators/batch_norm_op.cc                  | 2 +-
 python/paddle/fluid/layers/nn.py                         | 9 ++-------
 python/paddle/fluid/nets.py                              | 2 +-
 .../paddle/fluid/tests/book/test_image_classification.py | 5 +----
 4 files changed, 5 insertions(+), 13 deletions(-)

diff --git a/paddle/fluid/operators/batch_norm_op.cc b/paddle/fluid/operators/batch_norm_op.cc
index 969f75544f..5912a1a17c 100644
--- a/paddle/fluid/operators/batch_norm_op.cc
+++ b/paddle/fluid/operators/batch_norm_op.cc
@@ -135,7 +135,7 @@ class BatchNormOpMaker : public framework::OpProtoAndCheckerMaker {
     AddInput("Variance",
              "The global variance (for training) "
              "or estimated Variance (for testing)");
-    AddOutput("Y", "result after normalization");
+    AddOutput("Y", "result after normalization").Reuse("X");
     AddOutput("MeanOut",
               "Share memory with Mean. "
               "Store the global mean when training")
diff --git a/python/paddle/fluid/layers/nn.py b/python/paddle/fluid/layers/nn.py
index 83250f65e4..4bd260a005 100644
--- a/python/paddle/fluid/layers/nn.py
+++ b/python/paddle/fluid/layers/nn.py
@@ -27,7 +27,6 @@ from . import utils
 import random
 from .. import unique_name
 from functools import reduce
-import warnings
 
 __all__ = [
     'fc',
@@ -2048,7 +2047,7 @@ def batch_norm(input,
         param_attr(ParamAttr): The parameter attribute for Parameter `scale`.
         bias_attr(ParamAttr): The parameter attribute for Parameter `bias`.
         data_layout(string, default NCHW): NCHW|NHWC
-        in_place(bool, Default False): This argument is deprecated since 0.15.0.
+        in_place(bool, Default False): Make the input and output of batch norm reuse memory.
         use_mkldnn(bool, Default false): ${use_mkldnn_comment}
         name(string, Default None): A name for this layer(optional). If set None, the layer
             will be named automatically.
@@ -2070,10 +2069,6 @@ def batch_norm(input,
     helper = LayerHelper('batch_norm', **locals())
     dtype = helper.input_dtype()
 
-    if in_place:
-        raise warnings.warn("The argument in_place is deprecated since 0.15.0, "
-                            "please do not set it True.")
-
     input_shape = input.shape
     if data_layout == 'NCHW':
         channel_num = input_shape[1]
@@ -2123,7 +2118,7 @@ def batch_norm(input,
     saved_mean = helper.create_tmp_variable(dtype=dtype, stop_gradient=True)
     saved_variance = helper.create_tmp_variable(dtype=dtype, stop_gradient=True)
 
-    batch_norm_out = helper.create_tmp_variable(dtype)
+    batch_norm_out = input if in_place else helper.create_tmp_variable(dtype)
 
     helper.append_op(
         type="batch_norm",
diff --git a/python/paddle/fluid/nets.py b/python/paddle/fluid/nets.py
index 01563cbbb7..051fe84364 100644
--- a/python/paddle/fluid/nets.py
+++ b/python/paddle/fluid/nets.py
@@ -229,7 +229,7 @@ def img_conv_group(input,
             use_mkldnn=use_mkldnn)
 
         if conv_with_batchnorm[i]:
-            tmp = layers.batch_norm(input=tmp, act=conv_act)
+            tmp = layers.batch_norm(input=tmp, act=conv_act, in_place=True)
             drop_rate = conv_batchnorm_drop_rate[i]
             if abs(drop_rate) > 1e-5:
                 tmp = layers.dropout(x=tmp, dropout_prob=drop_rate)
diff --git a/python/paddle/fluid/tests/book/test_image_classification.py b/python/paddle/fluid/tests/book/test_image_classification.py
index cd1e8cd682..9fe361425c 100644
--- a/python/paddle/fluid/tests/book/test_image_classification.py
+++ b/python/paddle/fluid/tests/book/test_image_classification.py
@@ -256,10 +256,7 @@ def main(net_type, use_cuda, is_local=True):
     save_dirname = "image_classification_" + net_type + ".inference.model"
 
     train(net_type, use_cuda, save_dirname, is_local)
-
-    # There is bug in fluid.InferenceTranspiler for VGG.
-    if net_type == "resnet":
-        infer(use_cuda, save_dirname)
+    infer(use_cuda, save_dirname)
 
 
 class TestImageClassification(unittest.TestCase):
-- 
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