Merge pull request #15869 from TolyaTalamanov:at/plaidml-backend

G-API: Implement PlaidML2 backend

* PlaidML backend init version

* Add test

* Support multiply inputs/outputs in PlaidML2 backend

* Fix comment to review

* Add HAVE_PLAIDML macros

* Move plaidml tests to separate file

* Fix comment to review

* Fix cmake warning

* Fix comments to review

* Fix typos

overload -> overflow

* Fix comments to review

* Clean up

* Remove spaces from cmake scripts
* Disable tests with bitwise operations

* Use plaidml::exec::Binder

modules/gapi/src/api/gbackend.cpp

@@ -40,6 +40,16 @@ cv::gapi::GBackend::Priv::compile(const ade::Graph&,
     return {};
 }
 
+std::unique_ptr<cv::gimpl::GIslandExecutable>
+cv::gapi::GBackend::Priv::compile(const ade::Graph& graph,
+                                  const GCompileArgs& args,
+                                  const std::vector<ade::NodeHandle>& nodes,
+                                  const std::vector<cv::gimpl::Data>&,
+                                  const std::vector<cv::gimpl::Data>&) const
+{
+    return compile(graph, args, nodes);
+}
+
 void cv::gapi::GBackend::Priv::addBackendPasses(ade::ExecutionEngineSetupContext &)
 {
     // Do nothing by default, plugins may override this to

modules/gapi/src/api/gbackend_priv.hpp

@@ -18,6 +18,9 @@
 #include "opencv2/gapi/gcommon.hpp"
 #include "opencv2/gapi/gkernel.hpp"
 
+#include "compiler/gmodel.hpp"
+
+
 namespace cv
 {
 namespace gimpl
@@ -41,10 +44,18 @@ public:
     // there's no need in having both cv::gimpl::GBackend
     // and cv::gapi::GBackend - these two things can be unified
     // NOTE - nodes are guaranteed to be topologically sorted.
+
+    // NB: This method is deprecated
     virtual EPtr compile(const ade::Graph   &graph,
                          const GCompileArgs &args,
                          const std::vector<ade::NodeHandle> &nodes) const;
 
+    virtual EPtr compile(const ade::Graph   &graph,
+                         const GCompileArgs &args,
+                         const std::vector<ade::NodeHandle> &nodes,
+                         const std::vector<cv::gimpl::Data>& ins_data,
+                         const std::vector<cv::gimpl::Data>& outs_data) const;
+
     virtual void addBackendPasses(ade::ExecutionEngineSetupContext &);
 
     virtual cv::gapi::GKernelPackage auxiliaryKernels() const;