code cleanup according to comments from Paul.

src/targets/gpu/lowering.cpp

@@ -58,29 +58,29 @@ struct miopen_apply
 
     void init()
     {
-        add_miopen_simple_op("relu", miopen_relu{}, make_relu);
-        add_miopen_simple_op("sigmoid", miopen_sigmoid{}, make_sigmoid);
-        add_miopen_simple_op("abs", miopen_abs{}, make_abs);
-        add_miopen_simple_op("tanh", miopen_tanh{}, make_tanh);
-
-        add_miopen_extend_op("leaky_relu", miopen_leaky_relu{}, op::leaky_relu{}, make_leaky_relu);
-        add_miopen_extend_op("elu", miopen_elu{}, op::elu{}, make_elu);
-
-        add_generic_op("add", hip_add{});
-        add_generic_op("sin", hip_sin{});
-        add_generic_op("cos", hip_cos{});
-        add_generic_op("tan", hip_tan{});
-        add_generic_op("sinh", hip_sinh{});
-        add_generic_op("cosh", hip_cosh{});
-        add_generic_op("asin", hip_asin{});
-        add_generic_op("acos", hip_acos{});
-        add_generic_op("atan", hip_atan{});
-        add_generic_op("mul", hip_mul{});
-
-        add_extend_op("dot", miopen_gemm{}, op::dot{});
-        add_extend_op("contiguous", miopen_contiguous{}, op::contiguous{});
-        add_extend_op("concat", hip_concat{}, op::concat{});
-        add_extend_op("softmax", miopen_softmax{}, op::softmax{});
+        add_miopen_simple_op<miopen_relu>("relu", make_relu);
+        add_miopen_simple_op<miopen_sigmoid>("sigmoid", make_sigmoid);
+        add_miopen_simple_op<miopen_abs>("abs", make_abs);
+        add_miopen_simple_op<miopen_tanh>("tanh", make_tanh);
+
+        add_miopen_extend_op<miopen_leaky_relu, op::leaky_relu>("leaky_relu", make_leaky_relu);
+        add_miopen_extend_op<miopen_elu, op::elu>("elu", make_elu);
+
+        add_generic_op<hip_add>("add");
+        add_generic_op<hip_sin>("sin");
+        add_generic_op<hip_cos>("cos");
+        add_generic_op<hip_tan>("tan");
+        add_generic_op<hip_sinh>("sinh");
+        add_generic_op<hip_cosh>("cosh");
+        add_generic_op<hip_asin>("asin");
+        add_generic_op<hip_acos>("acos");
+        add_generic_op<hip_atan>("atan");
+        add_generic_op<hip_mul>("mul");
+
+        add_extend_op<miopen_gemm, op::dot>("dot");
+        add_extend_op<miopen_contiguous, op::contiguous>("contiguous");
+        add_extend_op<hip_concat, op::concat>("concat");
+        add_extend_op<miopen_softmax, op::softmax>("softmax");
 
         add_convolution_op();
         add_pooling_op();
@@ -143,7 +143,7 @@ struct miopen_apply
     }
 
     template <class T>
-    void add_generic_op(std::string name, T x)
+    void add_generic_op(std::string name)
     {
         apply_map.emplace(name, [=](instruction_ref ins) {
             auto output                       = insert_allocation(ins, ins->get_shape());
@@ -152,11 +152,10 @@ struct miopen_apply
 
             return prog->replace_instruction(ins, T{}, refs);
         });
-        (void)x;
     }
 
     template <class T, class Op>
-    void add_extend_op(std::string name, T x, Op o)
+    void add_extend_op(std::string name)
     {
         apply_map.emplace(name, [=](instruction_ref ins) {
             auto&& op                         = any_cast<Op>(ins->get_operator());
@@ -166,12 +165,10 @@ struct miopen_apply
 
             return prog->replace_instruction(ins, T{op}, refs);
         });
-        (void)x;
-        (void)o;
     }
 
     template <class T, class Op, class F>
-    void add_miopen_extend_op(std::string name, T x, Op o, F f)
+    void add_miopen_extend_op(std::string name, F f)
     {
         apply_map.emplace(name, [=](instruction_ref ins) {
             auto&& op = any_cast<Op>(ins->get_operator());
@@ -180,21 +177,16 @@ struct miopen_apply
             auto output = insert_allocation(ins, ins->get_shape());
             return prog->replace_instruction(ins, T{std::move(ad)}, ins->inputs().at(0), output);
         });
-        (void)x;
-        (void)o;
-        (void)f;
     }
 
     template <class T, class F>
-    void add_miopen_simple_op(std::string name, T x, F f)
+    void add_miopen_simple_op(std::string name, F f)
     {
         apply_map.emplace(name, [=](instruction_ref ins) {
             auto ad     = f();
             auto output = insert_allocation(ins, ins->get_shape());
             return prog->replace_instruction(ins, T{std::move(ad)}, ins->inputs().at(0), output);
         });
-        (void)x;
-        (void)f;
     }
 
     void add_batch_norm_inference_op()