add shape attribute in fill_constant op converted from scale_loss_grad after...

add shape attribute in fill_constant op converted from scale_loss_grad after convert graph to program (#43898)

* fix grad loss shape

* little change

* delete for_test

* add unittest for FLAGS_CONVERT_GRAPH_TO_PROGRAM

* avoid conflict

paddle/fluid/framework/ir/graph_helper.cc

@@ -452,6 +452,7 @@ static OpDesc *ReplaceScaleLossGradOp(const Node &node, OpDesc *desc) {
       OpProtoAndCheckerMaker::OpRoleAttrName(),
       (static_cast<int>(OpRole::kBackward) | static_cast<int>(OpRole::kLoss)));
   desc->SetAttr("value", 1.0f);
+  desc->SetAttr("shape", std::vector<int64_t>({1}));
   std::vector<std::string> output_names;
   for (auto out : node.outputs) {
     output_names.emplace_back(out->Name());

python/paddle/fluid/tests/unittests/interpreter/CMakeLists.txt

@@ -55,3 +55,6 @@ py_test_modules(
 py_test_modules(
   test_standalone_executor_serial_run MODULES test_standalone_executor ENVS
   FLAGS_new_executor_serial_run=true)
+
+py_test_modules(test_convert_graph_to_program MODULES test_standalone_executor
+                ENVS FLAGS_CONVERT_GRAPH_TO_PROGRAM=true)