fix mix input type error, test=develop

paddle/fluid/operators/save_combine_op.cc

@@ -23,14 +23,21 @@ class SaveCombineOp : public framework::OperatorWithKernel {
  public:
   using framework::OperatorWithKernel::OperatorWithKernel;
 
-  void InferShape(framework::InferShapeContext *ctx) const override {}
+  void InferShape(framework::InferShapeContext* ctx) const override {}
 
  protected:
   framework::OpKernelType GetExpectedKernelType(
-      const framework::ExecutionContext &ctx) const override {
-    return framework::OpKernelType(ctx.MultiInput<Tensor>("X")[0]->type(),
+      const framework::ExecutionContext& ctx) const override {
+    return framework::OpKernelType(framework::proto::VarType::FP32,
                                    ctx.GetPlace());
   }
+  // TODO(lujun): The override here is just to bypass transform
+  //  in operator impl, which is not elegant enough.
+  framework::OpKernelType GetKernelTypeForVar(
+      const std::string& var_name, const Tensor& tensor,
+      const framework::OpKernelType& expected_kernel_type) const override {
+    return expected_kernel_type;
+  }
 };
 
 class SaveCombineOpProtoMaker : public framework::OpProtoAndCheckerMaker {
@@ -61,7 +68,7 @@ to a file on disk.
         "(string)"
         "The \"file_path\" where the LoDTensor variables will be saved.")
         .AddCustomChecker(
-            [](const std::string &path) { return !path.empty(); });
+            [](const std::string& path) { return !path.empty(); });
   }
 };
 
@@ -77,6 +84,4 @@ REGISTER_OP_CPU_KERNEL(
     save_combine,
     ops::SaveCombineOpKernel<paddle::platform::CPUDeviceContext, float>,
     ops::SaveCombineOpKernel<paddle::platform::CPUDeviceContext, double>,
-    ops::SaveCombineOpKernel<paddle::platform::CPUDeviceContext, int>,
-    ops::SaveCombineOpKernel<paddle::platform::CPUDeviceContext, int8_t>,
-    ops::SaveCombineOpKernel<paddle::platform::CPUDeviceContext, int64_t>);
+    ops::SaveCombineOpKernel<paddle::platform::CPUDeviceContext, int>);

paddle/fluid/operators/save_combine_op.cu

@@ -20,6 +20,4 @@ REGISTER_OP_CUDA_KERNEL(
     save_combine,
     ops::SaveCombineOpKernel<paddle::platform::CUDADeviceContext, float>,
     ops::SaveCombineOpKernel<paddle::platform::CUDADeviceContext, double>,
-    ops::SaveCombineOpKernel<paddle::platform::CUDADeviceContext, int>,
-    ops::SaveCombineOpKernel<paddle::platform::CUDADeviceContext, int8_t>,
-    ops::SaveCombineOpKernel<paddle::platform::CUDADeviceContext, int64_t>);
+    ops::SaveCombineOpKernel<paddle::platform::CUDADeviceContext, int>);