diff --git a/dnn/src/common/handle.cpp b/dnn/src/common/handle.cpp
index 17e7edfa..ea9208b4 100644
--- a/dnn/src/common/handle.cpp
+++ b/dnn/src/common/handle.cpp
@@ -6,7 +6,8 @@
  *
  * Unless required by applicable law or agreed to in writing,
  * software distributed under the License is distributed on an
- * "AS IS" BASIS, WITHOUT ARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * "AS IS" BASIS, WITHOUT ARRANTIES OR CONDITIONS OF ANY KIND, either express or
+ * implied.
  */
 
 #include "megdnn/basic_types.h"
@@ -65,7 +66,7 @@ std::unique_ptr<Handle> Handle::make(megcoreComputingHandle_t computing_handle,
         // only enable midout for CPU, becuase CPU might be unused when some
         // other platforms are used
         MIDOUT_BEGIN(HandlePlatform, midout_iv(megcorePlatformCPU)) {
-        // CPU
+            // CPU
 #if MEGDNN_NAIVE
             return make_unique<naive::HandleImpl>(computing_handle);
 #else
@@ -90,91 +91,92 @@ std::unique_ptr<Handle> Handle::make(megcoreComputingHandle_t computing_handle,
             } else {
                 megdnn_throw("Debug level must be 0/1/2.");
             }
-        }
-        MIDOUT_END();
 #endif
         }
-        else if (platform == megcorePlatformROCM) {
+        MIDOUT_END();
+
+    }
+    else if (platform == megcorePlatformROCM) {
 #if MEGDNN_WITH_ROCM
-            return make_rocm_handle(computing_handle);
+        return make_rocm_handle(computing_handle);
 #else
-            return nullptr;
+        return nullptr;
 #endif
-        }
-        else if (platform == megcorePlatformCambricon) {
+    } else if (platform == megcorePlatformCambricon) {
 #if MEGDNN_WITH_CAMBRICON
-            return make_unique<cambricon::HandleImpl>(computing_handle);
+        return make_unique<cambricon::HandleImpl>(computing_handle);
 #else
-            return nullptr;
+        return nullptr;
 #endif
-        }
-        else if (platform == megcorePlatformAtlas) {
+    } else if (platform == megcorePlatformAtlas) {
 #if MEGDNN_WITH_ATLAS
-            return make_unique<atlas::HandleImpl>(computing_handle);
+        return make_unique<atlas::HandleImpl>(computing_handle);
 #else
-            return nullptr;
+        return nullptr;
 #endif
-        }
-        else {
-            // CUDA
-            megdnn_throw_if(platform != megcorePlatformCUDA, megdnn_error,
-                            "platform should be CUDA Platform");
+    }
+    else {
+        // CUDA
+        megdnn_throw_if(platform != megcorePlatformCUDA, megdnn_error,
+                        "platform should be CUDA Platform");
 #if MEGDNN_WITH_CUDA
-            return make_unique<cuda::HandleImpl>(computing_handle);
+        return make_unique<cuda::HandleImpl>(computing_handle);
 #else
-            return nullptr;
-#endif
-        }
         return nullptr;
+#endif
     }
-
-
-    void Handle::set_destructor(const thin_function<void()>& d) {
-        megdnn_assert(!m_destructor, "destructor can be set only once");
-        m_destructor = d;
-    }
-
-    Handle::~Handle() {
-        if (m_destructor)
-            m_destructor();
-        m_alive_magic = 0;
-    }
-
-    size_t Handle::alignment_requirement() const {
-        // default to 32
-        return 32;
+    return nullptr;
+}
+
+
+void Handle::set_destructor(const thin_function<void()>& d) {
+    megdnn_assert(!m_destructor, "destructor can be set only once");
+    m_destructor = d;
+}
+
+Handle::~Handle() {
+    if (m_destructor)
+        m_destructor();
+    m_alive_magic = 0;
+}
+
+size_t Handle::alignment_requirement() const {
+    // default to 32
+    return 32;
+}
+
+size_t Handle::image2d_pitch_alignment() const {
+    megdnn_throw("image2d tensor format not supported on this handle");
+}
+
+megdnn::HandleImplHelper::HandleVendorType Handle::vendor_type() const {
+    return HandleVendorType::NOT_SPEC;
+}
+
+bool Handle::check_cross_dev_copy_constraint(const TensorLayout& src) {
+    return src.is_contiguous();
+}
+
+void Handle::on_opr_destructed(OperatorBase* opr) {
+    if (m_alive_magic != ALIVE_MAGIC) {
+        megdnn_log_error(
+                "Handle is destructed before opr gets destructed. "
+                "Please fix the destruction order as this would cause "
+                "undefined memory access. "
+                "Abort now to avoid further problems.");
+        abort();
     }
-
-    size_t Handle::image2d_pitch_alignment() const {
-        megdnn_throw("image2d tensor format not supported on this handle");
+    if (m_on_opr_destructed) {
+        m_on_opr_destructed(opr);
     }
+}
 
-    megdnn::HandleImplHelper::HandleVendorType Handle::vendor_type() const {
-        return HandleVendorType::NOT_SPEC;
-    }
+OperatorBase::~OperatorBase() {
+    m_handle->on_opr_destructed(this);
+}
 
-    bool Handle::check_cross_dev_copy_constraint(const TensorLayout& src) {
-        return src.is_contiguous();
-    }
-
-    void Handle::on_opr_destructed(OperatorBase * opr) {
-        if (m_alive_magic != ALIVE_MAGIC) {
-            megdnn_log_error(
-                    "Handle is destructed before opr gets destructed. "
-                    "Please fix the destruction order as this would cause "
-                    "undefined memory access. "
-                    "Abort now to avoid further problems.");
-            abort();
-        }
-        if (m_on_opr_destructed) {
-            m_on_opr_destructed(opr);
-        }
-    }
-
-    OperatorBase::~OperatorBase() { m_handle->on_opr_destructed(this); }
-
-    template <typename Opr>
-    std::unique_ptr<Opr> Handle::create_operator() {
+template <typename Opr>
+std::unique_ptr<Opr> Handle::create_operator() {
 #define CASE(etype, nm)                                                        \
     case HandleType::etype: {                                                  \
         MIDOUT_BEGIN(HandleOpr, Opr, midout_iv(HandleType::etype)) {           \
@@ -183,48 +185,47 @@ std::unique_ptr<Handle> Handle::make(megcoreComputingHandle_t computing_handle,
         MIDOUT_END();                                                          \
     }
 
-        switch (m_handle_type) {
-            CASE(NAIVE, naive);
+    switch (m_handle_type) {
+        CASE(NAIVE, naive);
 #if !MEGDNN_NAIVE
-            CASE(FALLBACK, fallback);
+        CASE(FALLBACK, fallback);
 #if MEGDNN_X86
-            CASE(X86, x86);
+        CASE(X86, x86);
 #endif
 #if MEGDNN_ARMV7
-            CASE(ARMV7, armv7);
+        CASE(ARMV7, armv7);
 #endif
 #if MEGDNN_AARCH64
-            CASE(AARCH64, aarch64);
+        CASE(AARCH64, aarch64);
 #endif
 #if MEGDNN_ARMV7 || MEGDNN_AARCH64
-            CASE(ARM_COMMON, arm_common);
+        CASE(ARM_COMMON, arm_common);
 #endif
 #endif  // !MEGDNN_NAIVE
 #if MEGDNN_WITH_CUDA
-            CASE(CUDA,cuda);
+        CASE(CUDA, cuda);
 #endif
 #if MEGDNN_WITH_ATLAS
-            CASE(ATLAS, atlas);
+        CASE(ATLAS, atlas);
 #endif
 #if MEGDNN_WITH_ROCM
-            case HandleType::ROCM: {
-                MIDOUT_BEGIN(HandleOpr, Opr, midout_iv(HandleType::ROCM)) {
-                    return create_rocm_operator<Opr>();
-                }
-                MIDOUT_END();
+        case HandleType::ROCM: {
+            MIDOUT_BEGIN(HandleOpr, Opr, midout_iv(HandleType::ROCM)) {
+                return create_rocm_operator<Opr>();
             }
+            MIDOUT_END();
+        }
 #endif
 #if MEGDNN_WITH_CAMBRICON
             CASE(CAMBRICON, cambricon);
 #endif
-            default:
-                megdnn_throw("bad handle type");
-        }
-#undef CASE
+        default:
+            megdnn_throw("bad handle type");
     }
+#undef CASE
+}
 
 #define INST(opr) template std::unique_ptr<opr> Handle::create_operator();
-        MEGDNN_FOREACH_OPR_CLASS(INST)
+MEGDNN_FOREACH_OPR_CLASS(INST)
 #undef INST
 // vim: syntax=cpp.doxygen
-
diff --git a/dnn/src/common/relayout_helper.h b/dnn/src/common/relayout_helper.h
index 7ff34924..401a418f 100644
--- a/dnn/src/common/relayout_helper.h
+++ b/dnn/src/common/relayout_helper.h
@@ -41,7 +41,7 @@ bool is_transpose(const TensorLayout& src, const TensorLayout& dst,
 
 namespace transpose_fallback {
 
-#if MEGDNN_X86
+#if MEGDNN_X86 || MEGDNN_NAIVE
 constexpr size_t BLOCK_LINE_SIZE_BYTES = 64;
 #elif MEGDNN_AARCH64 || MEGDNN_ARMV7 /*BEGIN-INLINE-INTERNAL*/ || \
         MEGDNN_MIPS /*END-INLINE-INTERNAL*/