address PR review comments

src/ngraph/codegen/compiler.cpp

@@ -276,6 +276,7 @@ void StaticCompiler::add_header_search_path(const string& path)
                     if (error_code ec = code.getError())
                     {
                         // throw up
+                        throw runtime_error("could not find file '" + file + "'");
                     }
 
                     s_header_cache.add_file(mapped_name, code.get());

src/ngraph/file_util.cpp

@@ -187,7 +187,7 @@ vector<char> ngraph::file_util::read_file_contents(const string& path)
     if (f)
     {
         char* p = data.data();
-        int remainder = static_cast<int>(file_size);
+        size_t remainder = file_size;
         size_t offset = 0;
         while (f && remainder > 0)
         {

src/ngraph/runtime/cpu/emitter.cpp

@@ -1384,7 +1384,7 @@ void Emitter::generate_call(const std::vector<TensorViewInfo>& inputs,
 static string format_name(const string& name)
 {
     string rc;
-    if (name.size() > 0)
+    if (name.empty())
     {
         rc = " " + name;
     }

src/ngraph/runtime/cpu/external_function.cpp

@@ -83,7 +83,7 @@
 using namespace std;
 using namespace ngraph::runtime::cpu;
 
-static std::string s_output_dir = "cpu_codegen";
+static const std::string s_output_dir = "cpu_codegen";
 
 class StaticInitializers
 {

src/ngraph/runtime/cpu/memory_handler.cpp

@@ -41,8 +41,3 @@ runtime::cpu::MemoryHandler::~MemoryHandler()
         free(m_allocated_buffer_pool);
     }
 }
-
-void* runtime::cpu::MemoryHandler::get_ptr(size_t offset) const
-{
-    return m_aligned_buffer_pool + offset;
-}

src/ngraph/runtime/cpu/memory_handler.hpp

@@ -34,8 +34,7 @@ public:
     MemoryHandler(size_t pool_size, size_t alignment);
     ~MemoryHandler();
 
-    void* get_ptr(size_t offset) const;
-
+    void* get_ptr(size_t offset) const { return m_aligned_buffer_pool + offset; }
 private:
     char* m_allocated_buffer_pool;
     char* m_aligned_buffer_pool;