Fix TF literal parsing for relu6 (#1370)

Fixes TF literal parsing for relu6.  previously always made a float type literal, breaks for float16 as an example

src/tf/parse_relu6.cpp

@@ -41,8 +41,9 @@ struct parse_relu6 : op_parser<parse_relu6>
                           const tf_parser::node_info& info,
                           std::vector<instruction_ref> args) const
     {
-        auto min_val = info.add_literal(0.0f);
-        auto max_val = info.add_literal(6.0f);
+        shape::type_t output_type = args[0]->get_shape().type();
+        auto min_val = info.add_literal(migraphx::literal{migraphx::shape{output_type}, {0.0f}});
+        auto max_val = info.add_literal(migraphx::literal{migraphx::shape{output_type}, {6.0f}});
 
         return info.add_common_op("clip", args[0], min_val, max_val);
     }

test/tf/gen_tf_pb.py

@@ -495,10 +495,10 @@ def relu6_test(g1):
 
 
 @tf_test
-def relu6_mismatch_test(g1):
+def relu6_half_test(g1):
     with g1.as_default():
         g1_input = tf.compat.v1.placeholder(tf.float16,
-                                            shape=(1, 3, 13, 37),
+                                            shape=(1, 3, 16, 16),
                                             name='0')
         tf.nn.relu6(g1_input, 'relu6')
 
@@ -708,7 +708,7 @@ if __name__ == '__main__':
     pow_test()
     relu_test()
     relu6_test()
-    relu6_mismatch_test()
+    relu6_half_test()
     reshape_test()
     rsqrt_test()
     shape_test()

test/tf/relu6_mismatch_test.pb → test/tf/relu6_half_test.pb

@@ -2,7 +2,7 @@
 :
 
0Placeholder*
 dtype0*
-shape:

%
+shape:

 
 relu6Relu6
0*
 
T0"
\ No newline at end of file

test/tf/tf_test.cpp

@@ -729,27 +729,23 @@ TEST_CASE(relu6_test)
     EXPECT(p == prog);
 }
 
-TEST_CASE(relu6_mismatch_test)
+TEST_CASE(relu6_half_test)
 {
     migraphx::program p;
 
     auto* mm = p.get_main_module();
-    std::vector<size_t> input_lens{1, 3, 13, 37};
-    auto l0      = mm->add_parameter("0", migraphx::shape{migraphx::shape::half_type, input_lens});
-    auto min_val = mm->add_literal(0.0f);
-    auto max_val = mm->add_literal(6.0f);
-
-    auto l0_convert = mm->add_instruction(
-        migraphx::make_op("convert", {{"target_type", migraphx::shape::float_type}}), l0);
-
+    std::vector<size_t> input_lens{1, 3, 16, 16};
+    auto l0 = mm->add_parameter("0", migraphx::shape{migraphx::shape::half_type, input_lens});
+    auto min_val =
+        mm->add_literal(migraphx::literal{migraphx::shape{migraphx::shape::half_type}, {0.0f}});
+    auto max_val =
+        mm->add_literal(migraphx::literal{migraphx::shape{migraphx::shape::half_type}, {6.0f}});
     min_val = mm->add_instruction(migraphx::make_op("multibroadcast", {{"out_lens", input_lens}}),
                                   min_val);
     max_val = mm->add_instruction(migraphx::make_op("multibroadcast", {{"out_lens", input_lens}}),
                                   max_val);
-
-    mm->add_instruction(migraphx::make_op("clip"), l0_convert, min_val, max_val);
-
-    auto prog = optimize_tf("relu6_mismatch_test.pb", false);
+    mm->add_instruction(migraphx::make_op("clip"), l0, min_val, max_val);
+    auto prog = optimize_tf("relu6_half_test.pb", false);
 
     EXPECT(p == prog);
 }