support front end compile for job to iree

oneflow/api/python/framework/nn_graph.cpp

@@ -80,12 +80,18 @@ ONEFLOW_API_PYBIND11_MODULE("nn.graph.", m) {
   m.def("RunLazyNNGraph", &RunLazyNNGraph);
   m.def("SoftSyncNNGraphBuffers", &SoftSyncNNGraphBuffers);
   m.def("AddTensorAsGraphLoss", &AddTensorAsGraphLoss);
+  m.def("ConvertJobToTosaIR", [](const std::string& serialized_job) -> Maybe<std::string> {
+    Job job;
+    CHECK_OR_RETURN(TxtString2PbMessage(serialized_job, &job))
+        << "serialized job conversion failed.";
+    return ConvertJobToTosaIR(&job);
+  });
   m.def("SaveJobToIR",
         [](const std::string& serialized_job, const std::string& path) -> Maybe<void> {
           Job job;
-          CHECK_OR_RETURN(TxtString2PbMessage(serialized_job, &job));
+          CHECK_OR_RETURN(TxtString2PbMessage(serialized_job, &job))
+              << "serialized job conversion failed.";
           return SaveJobToIR(&job, path);
-          ;
         });
   m.def("LoadSerializedJobFromIR", [](const std::string& path) -> Maybe<py::bytes> {
     Job job;

oneflow/core/job/job_ir.cpp

@@ -19,6 +19,10 @@ namespace oneflow {
 
 #ifndef WITH_MLIR
 
+Maybe<std::string> ConvertJobToTosaIR(Job* job) {
+  UNIMPLEMENTED_THEN_RETURN() << "ConvertJobToTosaIR is only supported WITH_MLIR";
+}
+
 Maybe<void> SaveJobToIR(Job* job, const std::string& path) {
   UNIMPLEMENTED_THEN_RETURN() << "SaveJobToIR is only supported WITH_MLIR";
 }

oneflow/core/job/job_ir.h

@@ -21,6 +21,7 @@ limitations under the License.
 
 namespace oneflow {
 
+Maybe<std::string> ConvertJobToTosaIR(Job* job);
 Maybe<void> SaveJobToIR(Job* job, const std::string& path);
 Maybe<void> LoadJobFromIR(Job* job, const std::string& path);