add unit test to check if output is set correctly

src/ngraph/CMakeLists.txt

@@ -21,6 +21,7 @@ set (SRC
     descriptor/tensor.cpp
     descriptor/tensor_view.cpp
     descriptor/tuple.cpp
+    file_util.cpp
     function.cpp
     log.cpp
     node.cpp
@@ -53,7 +54,6 @@ set (SRC
     ops/tuple.cpp
     ops/unary_elementwise_arithmetic.cpp
     ops/unary_elementwise.cpp
-    pass/collect_functions.cpp
     pass/dump_sorted.cpp
     pass/liveness.cpp
     pass/manager.cpp

src/ngraph/descriptor/tensor.hpp

@@ -61,7 +61,7 @@ public:
     size_t get_pool_offset() const;
     const element::Type& get_element_type() const { return m_element_type; }
     static std::string make_tensor_name(const Node* node, size_t value_index);
-
+    void set_is_output() { m_is_output = true; }
 protected:
     const element::Type& m_element_type;
     PrimaryTensorView* m_primary_tensor_view;

src/ngraph/file_util.cpp

+/*
+ Copyright 2016 Nervana Systems Inc.
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+      http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+*/
+
+#include <cassert>
+#include <dirent.h>
+#include <fcntl.h>
+#include <fstream>
+#include <ftw.h>
+#include <iostream>
+#include <sstream>
+#include <stdexcept>
+#include <string.h>
+#include <sys/file.h>
+#include <sys/stat.h>
+#include <sys/time.h>
+#include <sys/types.h>
+#include <unistd.h>
+#include <vector>
+
+#include "file_util.hpp"
+
+using namespace std;
+
+string ngraph::file_util::path_join(const string& s1, const string& s2)
+{
+    string rc;
+    if (s2.size() > 0)
+    {
+        if (s2[0] == '/')
+        {
+            rc = s2;
+        }
+        else if (s1.size() > 0)
+        {
+            rc = s1;
+            if (rc[rc.size() - 1] != '/')
+            {
+                rc += "/";
+            }
+            rc += s2;
+        }
+        else
+        {
+            rc = s2;
+        }
+    }
+    else
+    {
+        rc = s1;
+    }
+    return rc;
+}
+
+size_t ngraph::file_util::get_file_size(const string& filename)
+{
+    // ensure that filename exists and get its size
+
+    struct stat stats;
+    if (stat(filename.c_str(), &stats) == -1)
+    {
+        throw std::runtime_error("Could not find file: \"" + filename + "\"");
+    }
+
+    return stats.st_size;
+}
+
+void ngraph::file_util::remove_directory(const string& dir)
+{
+    file_util::iterate_files(dir,
+                             [](const string& file, bool is_dir) {
+                                 if (is_dir)
+                                     rmdir(file.c_str());
+                                 else
+                                     remove(file.c_str());
+                             },
+                             true);
+    rmdir(dir.c_str());
+}
+
+void ngraph::file_util::remove_file(const string& file)
+{
+    remove(file.c_str());
+}
+
+bool ngraph::file_util::make_directory(const string& dir)
+{
+    if (mkdir(dir.c_str(), S_IRWXU | S_IRWXG | S_IROTH | S_IXOTH))
+    {
+        if (errno == EEXIST)
+        {
+            // not really an error, the directory already exists
+            return false;
+        }
+        throw std::runtime_error("error making directory " + dir + " " + strerror(errno));
+    }
+    return true;
+}
+
+string ngraph::file_util::make_temp_directory(const string& path)
+{
+    string fname = path.empty() ? file_util::get_temp_directory() : path;
+    string tmp_template = file_util::path_join(fname, "aeonXXXXXX");
+    char* tmpname = strdup(tmp_template.c_str());
+
+    mkdtemp(tmpname);
+
+    string rc = tmpname;
+    free(tmpname);
+    return rc;
+}
+
+std::string ngraph::file_util::get_temp_directory()
+{
+    const vector<string> potential_tmps = {"NERVANA_AEON_TMP", "TMPDIR", "TMP", "TEMP", "TEMPDIR"};
+
+    const char* path = nullptr;
+    for (const string& var : potential_tmps)
+    {
+        path = getenv(var.c_str());
+        if (path != nullptr)
+        {
+            break;
+        }
+    }
+    if (path == nullptr)
+    {
+        path = "/tmp";
+    }
+
+    return path;
+}
+
+vector<char> ngraph::file_util::read_file_contents(const string& path)
+{
+    size_t file_size = get_file_size(path);
+    vector<char> data;
+    data.reserve(file_size);
+    data.resize(file_size);
+
+    FILE* f = fopen(path.c_str(), "rb");
+    if (f)
+    {
+        char* p = data.data();
+        size_t remainder = file_size;
+        size_t offset = 0;
+        while (remainder > 0)
+        {
+            size_t rc = fread(&p[offset], 1, remainder, f);
+            offset += rc;
+            remainder -= rc;
+        }
+        fclose(f);
+    }
+    else
+    {
+        throw std::runtime_error("error opening file '" + path + "'");
+    }
+    return data;
+}
+
+std::string ngraph::file_util::read_file_to_string(const std::string& path)
+{
+    std::ifstream f(path);
+    std::stringstream ss;
+    ss << f.rdbuf();
+    return ss.str();
+}
+
+void ngraph::file_util::iterate_files(const string& path,
+                                      std::function<void(const string& file, bool is_dir)> func,
+                                      bool recurse)
+{
+    vector<string> files;
+    vector<string> dirs;
+    file_util::iterate_files_worker(path,
+                                    [&files, &dirs](const string& file, bool is_dir) {
+                                        if (is_dir)
+                                            dirs.push_back(file);
+                                        else
+                                            files.push_back(file);
+                                    },
+                                    true);
+
+    for (auto f : files)
+        func(f, false);
+    for (auto f : dirs)
+        func(f, true);
+}
+
+void ngraph::file_util::iterate_files_worker(
+    const string& path, std::function<void(const string& file, bool is_dir)> func, bool recurse)
+{
+    DIR* dir;
+    struct dirent* ent;
+    if ((dir = opendir(path.c_str())) != nullptr)
+    {
+        while ((ent = readdir(dir)) != nullptr)
+        {
+            string name = ent->d_name;
+            switch (ent->d_type)
+            {
+            case DT_DIR:
+                if (recurse && name != "." && name != "..")
+                {
+                    string dir_path = file_util::path_join(path, name);
+                    iterate_files(dir_path, func, recurse);
+                    func(dir_path, true);
+                }
+                break;
+            case DT_LNK: break;
+            case DT_REG:
+                name = file_util::path_join(path, name);
+                func(name, false);
+                break;
+            default: break;
+            }
+        }
+        closedir(dir);
+    }
+    else
+    {
+        throw std::runtime_error("error enumerating file " + path);
+    }
+}
+
+string ngraph::file_util::tmp_filename(const string& extension)
+{
+    string tmp_template =
+        file_util::path_join(file_util::get_temp_directory(), "ngraph_XXXXXX" + extension);
+    char* tmpname = strdup(tmp_template.c_str());
+
+    // mkstemp opens the file with open() so we need to close it
+    close(mkstemps(tmpname, static_cast<int>(extension.size())));
+
+    string rc = tmpname;
+    free(tmpname);
+    return rc;
+}
+
+void ngraph::file_util::touch(const std::string& filename)
+{
+    // inspired by http://chris-sharpe.blogspot.com/2013/05/better-than-systemtouch.html
+    int fd = open(filename.c_str(), O_WRONLY | O_CREAT | O_NOCTTY | O_NONBLOCK, 0666);
+    assert(fd >= 0);
+    close(fd);
+
+    // update timestamp for filename
+    int rc = utimes(filename.c_str(), nullptr);
+    assert(!rc);
+}
+
+bool ngraph::file_util::exists(const std::string& filename)
+{
+    struct stat buffer;
+    return (stat(filename.c_str(), &buffer) == 0);
+}
+
+int ngraph::file_util::try_get_lock(const std::string& filename)
+{
+    mode_t m = umask(0);
+    int fd = open(filename.c_str(), O_RDWR | O_CREAT, 0666);
+    umask(m);
+    if (fd >= 0 && flock(fd, LOCK_EX | LOCK_NB) < 0)
+    {
+        close(fd);
+        fd = -1;
+    }
+    return fd;
+}
+
+void ngraph::file_util::release_lock(int fd, const std::string& filename)
+{
+    if (fd >= 0)
+    {
+        remove_file(filename);
+        close(fd);
+    }
+}

src/ngraph/file_util.hpp

+/*
+ Copyright 2016 Nervana Systems Inc.
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+      http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+*/
+
+#pragma once
+
+#include <functional>
+#include <string>
+#include <vector>
+
+namespace ngraph
+{
+    class file_util;
+}
+
+class ngraph::file_util
+{
+public:
+    static std::string path_join(const std::string& s1, const std::string& s2);
+    static size_t get_file_size(const std::string& filename);
+    static void remove_directory(const std::string& dir);
+    static bool make_directory(const std::string& dir);
+    static std::string make_temp_directory(const std::string& path = "");
+    static std::string get_temp_directory();
+    static void remove_file(const std::string& file);
+    static std::vector<char> read_file_contents(const std::string& path);
+    static std::string read_file_to_string(const std::string& path);
+    static void iterate_files(const std::string& path,
+                              std::function<void(const std::string& file, bool is_dir)> func,
+                              bool recurse = false);
+    static std::string tmp_filename(const std::string& extension = "");
+    static void touch(const std::string& filename);
+    static bool exists(const std::string& filename);
+    static int try_get_lock(const std::string& filename);
+    static void release_lock(int fd, const std::string& filename);
+
+private:
+    static void iterate_files_worker(const std::string& path,
+                                     std::function<void(const std::string& file, bool is_dir)> func,
+                                     bool recurse = false);
+};

src/ngraph/function.cpp

@@ -33,6 +33,7 @@ Function::Function(const std::shared_ptr<Node>& result,
     , m_ordered_ops_valid(false)
     , m_instance_id(m_next_instance_id.fetch_add(1))
 {
+    m_result->set_is_output();
     traverse_nodes(this, [&](shared_ptr<Node> node) { m_ops.push_back(node); });
 }
 

src/ngraph/node.cpp

@@ -118,6 +118,10 @@ bool Node::is_output() const
 void Node::set_is_output()
 {
     m_is_output = true;
+    for (descriptor::Output& output : get_outputs())
+    {
+        output.get_tensor().set_is_output();
+    }
 }
 
 std::string Node::get_node_id() const

src/ngraph/pass/collect_functions.cpp

-// ----------------------------------------------------------------------------
-// Copyright 2017 Nervana Systems Inc.
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// ----------------------------------------------------------------------------
-
-#include "ngraph/pass/collect_functions.hpp"
-#include "ngraph/function.hpp"
-#include "ngraph/log.hpp"
-#include "ngraph/node.hpp"
-#include "ngraph/ops/function_call.hpp"
-#include "ngraph/ops/op.hpp"
-#include "ngraph/util.hpp"
-
-using namespace std;
-using namespace ngraph;
-using namespace ngraph::pass;
-
-bool CollectFunctions::run_on_function(shared_ptr<ngraph::Function> func)
-{
-    set<shared_ptr<ngraph::Function>> functions;
-    deque<shared_ptr<ngraph::Function>> stack;
-    stack.push_back(func);
-
-    while (stack.empty() == false)
-    {
-        shared_ptr<ngraph::Function> f = stack.front();
-        stack.pop_front();
-        functions.insert(f);
-        traverse_nodes(f, [&](shared_ptr<Node> node) {
-            shared_ptr<op::FunctionCall> fc = dynamic_pointer_cast<op::FunctionCall>(node);
-            if (fc)
-            {
-                stack.push_back(fc->get_function());
-            }
-        });
-    }
-
-    get_state().set_functions(functions);
-
-    return false;
-}

src/ngraph/pass/collect_functions.hpp

-// ----------------------------------------------------------------------------
-// Copyright 2017 Nervana Systems Inc.
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// ----------------------------------------------------------------------------
-
-#pragma once
-
-#include "ngraph/pass/pass.hpp"
-
-namespace ngraph
-{
-    namespace pass
-    {
-        class CollectFunctions;
-    }
-}
-
-class ngraph::pass::CollectFunctions : public FunctionPass
-{
-public:
-    bool run_on_function(std::shared_ptr<ngraph::Function>) override;
-
-private:
-};

src/ngraph/pass/dump_sorted.cpp

@@ -35,6 +35,9 @@ bool pass::DumpSorted::run_on_module(vector<shared_ptr<ngraph::Function>>& funct
     {
         for (shared_ptr<Function> f : functions)
         {
+            out << "=====================================================================\n";
+            out << f->get_name() << " start\n";
+            out << "=====================================================================\n";
             for (const shared_ptr<Node>& node : f->get_ordered_ops())
             {
                 out << node->get_name() << "(";
@@ -67,6 +70,9 @@ bool pass::DumpSorted::run_on_module(vector<shared_ptr<ngraph::Function>>& funct
                     out << "    F " << tensor->get_name() << "\n";
                 }
             }
+            out << "=====================================================================\n";
+            out << f->get_name() << " end\n";
+            out << "=====================================================================\n";
         }
     }
 

src/ngraph/pass/manager.cpp

@@ -18,6 +18,8 @@
 #include "ngraph/function.hpp"
 #include "ngraph/log.hpp"
 #include "ngraph/node.hpp"
+#include "ngraph/ops/function_call.hpp"
+#include "ngraph/ops/reduce.hpp"
 #include "ngraph/pass/manager.hpp"
 #include "ngraph/pass/pass.hpp"
 
@@ -36,10 +38,37 @@ void ngraph::pass::Manager::initialize_default_passes()
 {
 }
 
+static void find_functions(shared_ptr<Function> f, set<shared_ptr<Function>>& funcs)
+{
+    funcs.insert(f);
+
+    for (shared_ptr<Node> node : f->get_ops())
+    {
+        shared_ptr<op::FunctionCall> fc = dynamic_pointer_cast<op::FunctionCall>(node);
+        if (fc)
+        {
+            find_functions(fc->get_function(), funcs);
+        }
+        shared_ptr<op::Reduce> reduce = dynamic_pointer_cast<op::Reduce>(node);
+        if (reduce)
+        {
+            find_functions(reduce->get_reduction_function(), funcs);
+        }
+    }
+}
+
 void ngraph::pass::Manager::run_passes(shared_ptr<Function> func)
 {
-    vector<shared_ptr<Function>> fs = {func};
-    get_state().set_functions(fs);
+    // find all functions
+    set<shared_ptr<Function>> tfs;
+    find_functions(func, tfs);
+    get_state().set_functions(tfs);
+
+    vector<shared_ptr<Function>> fs;
+    for (shared_ptr<Function> f : get_state().get_functions())
+    {
+        fs.push_back(f);
+    }
 
     for (shared_ptr<PassBase> pass : m_pass_list)
     {
@@ -77,40 +106,6 @@ void ngraph::pass::Manager::run_passes(shared_ptr<Function> func)
             }
         }
     }
-    // for (shared_ptr<ModulePass>& p : m_module_passes)
-    // {
-    //     p->set_state(get_state());
-    //     p->run_on_module(fs);
-    // }
-
-    // for (Function* f : fs)
-    // {
-    //     for (shared_ptr<FunctionPass> p : m_function_passes)
-    //     {
-    //         p->set_state(get_state());
-    //         p->run_on_function(f);
-    //     }
-    // }
-
-    // for (Function* f : fs)
-    // {
-    //     NGRAPH_INFO;
-    //     for (shared_ptr<NodePass> p : m_node_passes)
-    //     {
-    //         for (Node* node : f->get_ops())
-    //         {
-    //             NGRAPH_INFO;
-    //             p->set_state(get_state());
-    //             p->run_on_node(node);
-    //         }
-    //     }
-    // }
-
-    // for (shared_ptr<CallGraphPass>& p : m_call_graph_passes)
-    // {
-    //     p->set_state(get_state());
-    //     p->run_on_call_graph(func->get_ordered_ops());
-    // }
 }
 
 ngraph::pass::ManagerState& ngraph::pass::Manager::get_state()

src/ngraph/pass/manager_state.cpp

@@ -23,7 +23,7 @@
 using namespace std;
 using namespace ngraph;
 
-vector<shared_ptr<Function>>& ngraph::pass::ManagerState::get_functions()
+const vector<shared_ptr<Function>>& ngraph::pass::ManagerState::get_functions()
 {
     return m_function_list;
 }

src/ngraph/pass/manager_state.hpp

@@ -30,7 +30,7 @@ namespace ngraph
 class ngraph::pass::ManagerState
 {
 public:
-    std::vector<std::shared_ptr<Function>>& get_functions();
+    const std::vector<std::shared_ptr<Function>>& get_functions();
 
     template <typename T>
     void set_functions(const T& collection)

src/ngraph/runtime/cpu/call_frame.cpp

@@ -20,10 +20,8 @@
 using namespace std;
 using namespace ngraph::runtime::cpu;
 
-CallFrame::CallFrame(EntryPoint compiled_function,
-                     const std::vector<std::shared_ptr<CallFrame>>& callees)
+CallFrame::CallFrame(EntryPoint compiled_function)
     : m_compiled_function(compiled_function)
-    , m_callees(callees)
 {
 }
 
@@ -31,23 +29,23 @@ void CallFrame::tensor_call(
     const std::vector<std::shared_ptr<ngraph::runtime::TensorView>>& input_tvs,
     const std::vector<std::shared_ptr<ngraph::runtime::TensorView>>& output_tvs)
 {
-    m_inputs.clear();
-    m_outputs.clear();
+    vector<void*> inputs;
+    vector<void*> outputs;
     for (size_t i = 0; i < input_tvs.size(); i++)
     {
         shared_ptr<runtime::cpu::CPUTensorView> tv =
             static_pointer_cast<runtime::cpu::CPUTensorView>(input_tvs[i]);
-        m_inputs.push_back(tv->get_data_ptr());
+        inputs.push_back(tv->get_data_ptr());
     }
     for (size_t i = 0; i < output_tvs.size(); i++)
     {
         shared_ptr<runtime::cpu::CPUTensorView> tv =
             static_pointer_cast<runtime::cpu::CPUTensorView>(output_tvs[i]);
-        m_outputs.push_back(tv->get_data_ptr());
+        outputs.push_back(tv->get_data_ptr());
     }
 
     // Invoke compiled computation
-    m_compiled_function(this);
+    m_compiled_function(inputs, outputs);
 }
 
 void CallFrame::operator()(const std::vector<std::shared_ptr<ngraph::runtime::Value>>& arguments,
@@ -68,15 +66,3 @@ void CallFrame::operator()(const std::vector<std::shared_ptr<ngraph::runtime::Va
 
     tensor_call(inputs, outputs);
 }
-
-void* CallFrame::get_input_data(size_t index)
-{
-    void* rc = m_inputs.at(index);
-    return rc;
-}
-
-void* CallFrame::get_output_data(size_t index)
-{
-    void* rc = m_outputs.at(index);
-    return rc;
-}

src/ngraph/runtime/cpu/call_frame.hpp

@@ -32,7 +32,8 @@ namespace ngraph
         {
             class CallFrame;
 
-            using EntryPoint_t = void(ngraph::runtime::cpu::CallFrame* call_frame);
+            using EntryPoint_t = void(const std::vector<void*>& inputs,
+                                      const std::vector<void*>& outputs);
 
             using EntryPoint = std::function<EntryPoint_t>;
 
@@ -40,8 +41,7 @@ namespace ngraph
             class CallFrame : public ngraph::runtime::CallFrame
             {
             public:
-                CallFrame(EntryPoint compiled_function,
-                          const std::vector<std::shared_ptr<CallFrame>>& callees);
+                CallFrame(EntryPoint compiled_function);
 
                 /// @brief Invoke the function with values matching the signature of the function.
                 ///
@@ -56,19 +56,9 @@ namespace ngraph
                                  const std::vector<std::shared_ptr<TensorView>>& outputs);
 
                 void set_return() { m_return = true; }
-                // const std::vector<std::shared_ptr<ngraph::runtime::Value>>& get_inputs();
-                // const std::vector<std::shared_ptr<ngraph::runtime::Value>>& get_outputs();
-
-                void* get_input_data(size_t index);
-                void* get_output_data(size_t index);
-
             protected:
                 bool m_return;
                 EntryPoint m_compiled_function;
-                std::vector<std::shared_ptr<CallFrame>> m_callees;
-
-                std::vector<void*> m_inputs;
-                std::vector<void*> m_outputs;
             };
         }
     }

src/ngraph/runtime/cpu/emitter.hpp

@@ -25,7 +25,6 @@
 #define EMITTER_DECL(E)                                                                            \
     E(const ngraph::Node* n,                                                                       \
       ExternalFunction* ef,                                                                        \
-      FunctionMap& function_map,                                                                   \
       const std::vector<TensorViewInfo>& inputs,                                                   \
       const std::vector<TensorViewInfo>& outputs)
 

src/ngraph/runtime/cpu/external_function.hpp

@@ -42,7 +42,6 @@ namespace ngraph
             using OpFunction = std::function<void(Emitter*,
                                                   const ngraph::Node*,
                                                   ExternalFunction*,
-                                                  FunctionMap&,
                                                   const std::vector<TensorViewInfo>& inputs,
                                                   const std::vector<TensorViewInfo>& outputs)>;
 
@@ -54,15 +53,11 @@ namespace ngraph
                 ExternalFunction(const std::shared_ptr<ngraph::Function>& function,
                                  bool release_function = true);
                 std::shared_ptr<ngraph::runtime::CallFrame> make_call_frame();
-                std::vector<std::shared_ptr<CallFrame>>& get_callees() { return callees; }
+
             protected:
-                void compile(FunctionMap& function_map);
+                void compile();
 
-                size_t m_n_inputs;
-                size_t m_n_outputs;
-                ngraph::descriptor::TensorViewPtrs m_temp_views;
                 EntryPoint m_compiled_function;
-                std::vector<std::shared_ptr<CallFrame>> callees;
             };
         }
     }

test/backend_test.in.cpp

@@ -1422,10 +1422,10 @@ TEST(${BACKEND_NAME}, reduce_trivial)
     auto cf = backend->make_call_frame(external);
 
     // Create some tensors for input/output
-    auto a = runtime::make_tensor<element::Float32>(shape);
+    auto a = backend->make_primary_tensor_view(element::Float32::element_type(), shape);
     copy_data(a, vector<float>{1, 2, 3, 4});
-    auto b = runtime::make_tensor<element::Float32>(shape);
-    copy_data(b, vector<float>{0});
+    auto b = backend->make_primary_tensor_view(element::Float32::element_type(), shape);
+    copy_data(b, vector<float>{0, 0, 0, 0});
     auto result = backend->make_primary_tensor_view(element::Float32::element_type(), shape);
 
     (*cf)({a, b}, {result});

test/tensor.cpp

@@ -113,3 +113,24 @@ TEST(tensor, read_write)
     test_read_write<element::Float32>({1.0, 3.0, 5.0});
     test_read_write<element::Int64>({-1, 2, 4});
 }
+
+TEST(tensor, output_flag)
+{
+    pass::Manager pass_manager;
+    pass_manager.register_pass<pass::TopologicalSort>();
+    pass_manager.register_pass<pass::Liveness>();
+
+    auto arg0 = make_shared<op::Parameter>(element::Float32::element_type(), Shape{1});
+    auto add = make_shared<op::Add>(arg0, arg0);
+    auto rt = make_shared<TensorViewType>(element::Float32::element_type(), Shape{1});
+    auto f0 = make_shared<Function>(add, rt, op::Parameters{arg0});
+
+    pass_manager.run_passes(f0);
+
+    EXPECT_TRUE(f0->get_result()->is_output());
+    for (descriptor::Output& output : f0->get_result()->get_outputs())
+    {
+        const Tensor& t = output.get_tensor();
+        EXPECT_TRUE(t.is_output());
+    }
+}

test/topological_sort.cpp

@@ -21,7 +21,6 @@
 
 #include "ngraph/log.hpp"
 #include "ngraph/ngraph.hpp"
-#include "ngraph/pass/collect_functions.hpp"
 #include "ngraph/pass/dump_sorted.hpp"
 #include "ngraph/pass/manager.hpp"
 #include "ngraph/pass/topological_sort.hpp"
@@ -172,11 +171,11 @@ TEST(topological_sort, collect_functions)
                                    "h");
 
     pass::Manager pass_manager;
-    pass_manager.register_pass<pass::CollectFunctions>();
     pass_manager.run_passes(h);
 
     set<string> expected = {"f", "g", "h"};
     auto functions = pass_manager.get_state().get_functions();
+
     vector<string> fnames;
     for (shared_ptr<Function> func : functions)
     {