[BUILD] Add clang to build matrix, -Werror

CMakeLists.txt

@@ -82,8 +82,8 @@ if(MSVC)
 else(MSVC)
   include(CheckCXXCompilerFlag)
   check_cxx_compiler_flag("-std=c++11"    SUPPORT_CXX11)
-  set(CMAKE_C_FLAGS "-O3 -Wall -fPIC")
-  set(CMAKE_CXX_FLAGS "${CMAKE_C_FLAGS} -std=c++11")
+  set(CMAKE_C_FLAGS "-O2 -Wall -fPIC ${CMAKE_C_FLAGS}")
+  set(CMAKE_CXX_FLAGS "-O2 -Wall -fPIC -std=c++11 ${CMAKE_CXX_FLAGS}")
 endif(MSVC)
 
 # add source group

Jenkinsfile

@@ -96,6 +96,8 @@ stage('Build') {
            echo set\\(USE_SORT ON\\) >> config.cmake
            echo set\\(USE_GRAPH_RUNTIME ON\\) >> config.cmake
            echo set\\(USE_BLAS openblas\\) >> config.cmake
+           echo set\\(CMAKE_CXX_COMPILER g++\\) >> config.cmake
+           echo set\\(CMAKE_CXX_FLAGS -Werror\\) >> config.cmake
            """
         make('gpu', 'build', '-j2')
         pack_lib('gpu', tvm_multilib)
@@ -106,7 +108,9 @@ stage('Build') {
            cp ../cmake/config.cmake .
            echo set\\(USE_OPENCL ON\\) >> config.cmake
            echo set\\(USE_ROCM ON\\) >> config.cmake
-           echo set\\(USE_VULKAN OFF\\) >> config.cmake
+           echo set\\(USE_VULKAN ON\\) >> config.cmake
+           echo set\\(CMAKE_CXX_COMPILER clang-6.0\\) >> config.cmake
+           echo set\\(CMAKE_CXX_FLAGS -Werror\\) >> config.cmake
            """
         make('gpu', 'build2', '-j2')
       }
@@ -122,6 +126,8 @@ stage('Build') {
            cp ../cmake/config.cmake .
            echo set\\(USE_SORT ON\\) >> config.cmake
            echo set\\(USE_LLVM llvm-config-4.0\\) >> config.cmake
+           echo set\\(CMAKE_CXX_COMPILER g++\\) >> config.cmake
+           echo set\\(CMAKE_CXX_FLAGS -Werror\\) >> config.cmake
            """
         make('cpu', 'build', '-j2')
         pack_lib('cpu', tvm_lib)
@@ -142,6 +148,8 @@ stage('Build') {
            echo set\\(USE_SORT ON\\) >> config.cmake
            echo set\\(USE_RPC ON\\) >> config.cmake
            echo set\\(USE_LLVM llvm-config-5.0\\) >> config.cmake
+           echo set\\(CMAKE_CXX_COMPILER g++\\) >> config.cmake
+           echo set\\(CMAKE_CXX_FLAGS -Werror\\) >> config.cmake
            """
         make('i386', 'build', '-j2')
         pack_lib('i386', tvm_multilib)

README.md

@@ -1,18 +1,18 @@
 <img src=https://raw.githubusercontent.com/tqchen/tvm.ai/master/images/logo/tvm-logo-small.png width=128/> Open Deep Learning Compiler Stack
 ==============================================
 
-[![GitHub license](http://dmlc.github.io/img/apache2.svg)](./LICENSE)
+[![GitHub license](https://dmlc.github.io/img/apache2.svg)](./LICENSE)
 [![Build Status](http://mode-gpu.cs.washington.edu:8080/buildStatus/icon?job=dmlc/tvm/master)](http://mode-gpu.cs.washington.edu:8080/job/dmlc/job/tvm/job/master/)
 
-[Documentation](http://docs.tvm.ai) |
+[Documentation](https://docs.tvm.ai) |
 [Contributors](CONTRIBUTORS.md) |
-[Community](http://tvm.ai/community.html) |
+[Community](https://tvm.ai/community.html) |
 [Release Notes](NEWS.md)
 
 TVM is a compiler stack for deep learning systems. It is designed to close the gap between the
 productivity-focused deep learning frameworks, and the performance- and efficiency-focused hardware backends.
 TVM works with deep learning frameworks to provide end to end compilation to different backends.
-Checkout the [tvm stack homepage](http://tvm.ai/)  for more information.
+Checkout the [tvm stack homepage](https://tvm.ai/)  for more information.
 
 License
 -------
@@ -21,7 +21,7 @@ License
 Contribute to TVM
 -----------------
 TVM adopts apache committer model, we aim to create an open source project that is maintained and owned by the community.
-Checkout the [Contributor Guide](http://docs.tvm.ai/contribute/)
+Checkout the [Contributor Guide](https://docs.tvm.ai/contribute/)
 
 Acknowledgement
 ---------------

nnvm/src/core/symbolic.cc

@@ -200,7 +200,7 @@ std::vector<NodePtr> Symbol::ListInputs(ListInputOption option) const {
     std::vector<NodePtr> vlist;
     vlist.reserve(this->outputs.size());
     static auto& fmutate_inputs = Op::GetAttr<FMutateInputs>("FMutateInputs");
-    DFSVisit(this->outputs, [&ret, &mutable_set, &vlist](const NodePtr &node) {
+    DFSVisit(this->outputs, [&mutable_set, &vlist](const NodePtr &node) {
         if (node->is_variable()) {
           vlist.push_back(node);
         } else if (fmutate_inputs.count(node->op())) {

src/contrib/sort/sort.cc

@@ -78,12 +78,14 @@ TVM_REGISTER_GLOBAL("tvm.contrib.sort.argsort")
         int64_t full_idx = base_idx + k * axis_mul_after;
         sorter.emplace_back(std::make_pair(k, *(data_ptr + full_idx)));
       }
-      std::stable_sort(sorter.begin(), sorter.end(),
-                       is_descend ? CompareDescend<float>
-                                  : CompareAscend<float>);
+      if (is_descend) {
+        std::stable_sort(sorter.begin(), sorter.end(), CompareDescend<float>);
+      } else {
+        std::stable_sort(sorter.begin(), sorter.end(), CompareAscend<float>);
+      }
       for (int32_t k = 0; k < input->shape[axis]; ++k) {
         *(static_cast<int32_t *>(output->data) + base_idx + k * axis_mul_after)
-          = k < sorter.size() ? sorter[k].first : k;
+            = k < static_cast<int32_t>(sorter.size()) ? sorter[k].first : k;
       }
     }
   }

src/runtime/opengl/opengl_device_api.cc

@@ -328,10 +328,11 @@ static TextureFormat GetTextureFormat(TVMType type) {
           LOG(FATAL) << "Unsupported type bits " << type.bits;
       }
     }
-    default:
+    default: {
       LOG(FATAL) << "Unsupported type code" << type.code;
+    }
   }
-  assert(false);
+  return {GL_R32F, GL_RED, GL_FLOAT};
 }
 
 Texture OpenGLWorkspace::CreateTexture(TVMType type, size_t nbytes) {

src/runtime/opengl/opengl_module.h

@@ -88,8 +88,10 @@ inline std::string OpenGLArgKind2String(OpenGLArgKind kind) {
       return "input_texture";
     case OpenGLArgKind::kUniform:
       return "uniform";
+    default:
+      LOG(FATAL) << "invalid arg kind";
+      return "";
   }
-  assert(false);
 }
 
 inline OpenGLArgKind String2OpenGLArgKind(const std::string& str) {
@@ -101,7 +103,7 @@ inline OpenGLArgKind String2OpenGLArgKind(const std::string& str) {
     return OpenGLArgKind::kUniform;
   } else {
     LOG(FATAL) << "Invalid OpenGL arg kind.";
-    assert(false);
+    return OpenGLArgKind::kUniform;
   }
 }
 

tests/ci_build/Dockerfile.gpu

@@ -60,8 +60,8 @@ RUN bash /install/ubuntu_install_onnx.sh
 RUN pip3 install Pillow
 
 # disable vulkan for now
-# COPY install/ubuntu_install_vulkan.sh /install/ubuntu_install_vulkan.sh
-# RUN bash /install/ubuntu_install_vulkan.sh
+COPY install/ubuntu_install_vulkan.sh /install/ubuntu_install_vulkan.sh
+RUN bash /install/ubuntu_install_vulkan.sh
 
 # Environment variables
 ENV PATH=/usr/local/nvidia/bin:${PATH}

tests/ci_build/install/ubuntu_install_llvm.sh

@@ -19,4 +19,4 @@ echo deb-src http://apt.llvm.org/xenial/ llvm-toolchain-xenial main\
      >> /etc/apt/sources.list.d/llvm.list
 
 wget -O - http://apt.llvm.org/llvm-snapshot.gpg.key|sudo apt-key add -
-apt-get update && apt-get install -y --force-yes llvm-4.0 llvm-5.0 llvm-6.0
+apt-get update && apt-get install -y --force-yes llvm-4.0 llvm-5.0 llvm-6.0 clang-6.0

topi/include/topi/reduction.h

@@ -238,8 +238,8 @@ inline FCommReduce MakeCommReducer(FCombine fcombine,
     for (size_t i = 0; i < exprs.size(); ++i) {
       auto dtype = exprs[i].type();
       dtypes.push_back(dtype);
-      lhs.push_back(var("lhs_" + std::to_string(i), dtype));
-      rhs.push_back(var("rhs_" + std::to_string(i), dtype));
+      lhs.push_back(var(name + "_lhs_" + std::to_string(i), dtype));
+      rhs.push_back(var(name + "_rhs_" + std::to_string(i), dtype));
     }
 
     auto result = fcombine(lhs, rhs);