Enable device switching automatically for serveral operators (#8684)

Author: qingqing01

paddle/fluid/operators/bipartite_match_op.cc

@@ -41,6 +41,14 @@ class BipartiteMatchOp : public framework::OperatorWithKernel {
     ctx->SetOutputDim("ColToRowMatchIndices", dims);
     ctx->SetOutputDim("ColToRowMatchDist", dims);
   }
+
+ protected:
+  framework::OpKernelType GetExpectedKernelType(
+      const framework::ExecutionContext& ctx) const override {
+    return framework::OpKernelType(
+        framework::ToDataType(ctx.Input<LoDTensor>("DistMat")->type()),
+        platform::CPUPlace());
+  }
 };
 
 template <typename T>

paddle/fluid/operators/multiclass_nms_op.cc

@@ -62,7 +62,7 @@ class MultiClassNMSOp : public framework::OperatorWithKernel {
     return framework::OpKernelType(
         framework::ToDataType(
             ctx.Input<framework::LoDTensor>("Scores")->type()),
-        ctx.device_context());
+        platform::CPUPlace());
   }
 };
 

paddle/fluid/operators/prior_box_op.cc

@@ -67,6 +67,14 @@ class PriorBoxOp : public framework::OperatorWithKernel {
     ctx->SetOutputDim("Boxes", framework::make_ddim(dim_vec));
     ctx->SetOutputDim("Variances", framework::make_ddim(dim_vec));
   }
+
+ protected:
+  framework::OpKernelType GetExpectedKernelType(
+      const framework::ExecutionContext& ctx) const override {
+    return framework::OpKernelType(
+        framework::ToDataType(ctx.Input<framework::Tensor>("Input")->type()),
+        platform::CPUPlace());
+  }
 };
 
 class PriorBoxOpMaker : public framework::OpProtoAndCheckerMaker {