add missing files for get_tuple_elem

src/targets/gpu/get_tuple_elem.cpp

+#include <migraphx/gpu/get_tuple_elem.hpp>
+#include <migraphx/gpu/context.hpp>
+#include <migraphx/gpu/device/contiguous.hpp>
+
+namespace migraphx {
+inline namespace MIGRAPHX_INLINE_NS {
+namespace gpu {
+
+shape hip_get_tuple_elem::compute_shape(std::vector<shape> inputs) const
+{
+    inputs.pop_back();
+    return op.compute_shape(inputs);
+}
+
+argument hip_get_tuple_elem::compute(context& ctx, const shape&, const std::vector<argument>& args) const
+{
+    auto sub_args = args.front().get_sub_objects();
+    device::contiguous(ctx.get_stream().get(), args.back(), sub_args[op.index]);
+    return args.back();
+}
+
+} // namespace gpu
+} // namespace MIGRAPHX_INLINE_NS
+} // namespace migraphx

src/targets/gpu/include/migraphx/gpu/get_tuple_elem.hpp

+#ifndef MIGRAPHX_GUARD_RTGLIB_GET_TUPLE_ELEM_HPP
+#define MIGRAPHX_GUARD_RTGLIB_GET_TUPLE_ELEM_HPP
+
+#include <migraphx/argument.hpp>
+#include <migraphx/reflect.hpp>
+#include <migraphx/op/get_tuple_elem.hpp>
+#include <migraphx/gpu/miopen.hpp>
+
+namespace migraphx {
+inline namespace MIGRAPHX_INLINE_NS {
+namespace gpu {
+
+struct context;
+
+struct hip_get_tuple_elem
+{
+    op::get_tuple_elem op;
+
+    template <class Self, class F>
+    static auto reflect(Self& self, F f)
+    {
+        return migraphx::reflect(self.op, f);
+    }
+
+    std::string name() const { return "gpu::get_tuple_elem"; }
+    shape compute_shape(std::vector<shape> inputs) const;
+    argument
+    compute(context& ctx, const shape& output_shape, const std::vector<argument>& args) const;
+    std::ptrdiff_t output_alias(const std::vector<shape>& shapes) const
+    {
+        return shapes.size() - 1;
+    }
+};
+
+} // namespace gpu
+} // namespace MIGRAPHX_INLINE_NS
+} // namespace migraphx
+
+#endif