// There was an issue with dead argument elminitaion optimization, which lead
// to runtime errors when setting kernel arguments if the app was compiled with
// optimizations, but linked without them.
//
// The test checks that the scenario works correctly.
//
// RUN: %{build} -O2 -c -o %t.o
// RUN: %clangxx -fsycl %{sycl_target_opts} %t.o %O0 -Wno-unused-command-line-argument -o %t.out
// RUN: %{run} %t.out

// XFAIL: spirv-backend && run-mode
// XFAIL-TRACKER: CMPLRLLVM-64059

// Failing on HIP AMD, enable after fixed
// UNSUPPORTED: hip

#include <iostream>
#include <sycl/detail/core.hpp>

int main() {
  constexpr int THE_ANSWER = 42;

  sycl::queue q;

  int storage;
  int storage2;
  {
    sycl::buffer buf(&storage, sycl::range<1>(1));
    sycl::buffer buf2(&storage2, sycl::range<1>(1));

    q.submit([&](sycl::handler &h) {
      auto acc = buf.get_access(h);
      auto acc2 = buf2.get_access(h);
      h.single_task([=]() {
        (void)acc; // unused
        acc2[0] = THE_ANSWER;
      });
    });
  }

  return storage2 != THE_ANSWER;
}