add one more unit test for better code coverage

test/gpu/miopen.cpp

@@ -3787,4 +3787,21 @@ struct test_reduce_mean_half : verify_program<test_reduce_mean_half>
     };
 };
 
+struct test_convert : verify_program<test_convert>
+{
+    migraphx::program create_program() const
+    {
+        migraphx::program p;
+        migraphx::shape sa{migraphx::shape::float_type, {8, 24}};
+        migraphx::shape sb{migraphx::shape::float_type, {24, 6}};
+        auto pa = p.add_parameter("a", sa);
+        auto pb = p.add_parameter("b", sb);
+        auto ia = p.add_instruction(migraphx::op::convert{migraphx::shape::int8_type, 16.0f, 1.0f}, pa);
+        auto ib = p.add_instruction(migraphx::op::convert{migraphx::shape::int8_type, 16.0f, 2.0f}, pb);
+        p.add_instruction(migraphx::op::quant_dot{}, ia, ib);
+
+        return p;
+    };
+};
+
 int main(int argc, const char* argv[]) { test::run(argc, argv); }