[E2E Test] Add regression test for #13887 (#13888)

The test is marked as `XFAIL` until #13887 gets fixed in OCL FPGA EMU.

Signed-off-by: Yilong Guo <yilong.guo@intel.com>

sycl/test-e2e/Basic/fpga_tests/fpga_pipes_mixed_usage.cpp

@@ -0,0 +1,59 @@
+//===-- fpga_pipes_mixed_usage.cpp -- Using pipe and experimental::pipe ---===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+// REQUIRES: accelerator
+// RUN: %{build} -o %t.out
+// RUN: %{run} %t.out
+
+// https://github.com/intel/llvm/issues/13887
+// XFAIL: *
+// If users need to use host pipe feature provided by experimental::pipe, all
+// pipes in their design should use the experimental::pipe (as a workround).
+
+#include <iostream>
+#include <sycl/detail/core.hpp>
+#include <sycl/ext/intel/fpga_extensions.hpp>
+#include <sycl/pipes.hpp>
+
+// Test for using sycl::ext::intel::pipe and
+// sycl::ext::intel::experimental::pipe in the same kernel.
+using NonExpPipe = sycl::ext::intel::pipe<class PipeA, int>;
+using ExpPipe = sycl::ext::intel::experimental::pipe<class PipeB, short>;
+
+int main() {
+  sycl::queue q(sycl::ext::intel::fpga_emulator_selector_v);
+
+  q.submit([&](sycl::handler &cgh) {
+    cgh.single_task<class SimplePipeWrite>([=]() {
+      NonExpPipe::write(42);
+      ExpPipe::write(24);
+    });
+  });
+  q.wait();
+
+  int a = 0;
+  short b = 0;
+  sycl::buffer<int, 1> buf_a(&a, 1);
+  sycl::buffer<short, 1> buf_b(&b, 1);
+  q.submit([&](sycl::handler &cgh) {
+    auto acc_a = buf_a.get_access<sycl::access::mode::write>(cgh);
+    auto acc_b = buf_b.get_access<sycl::access::mode::write>(cgh);
+    cgh.single_task<class SimplePipeRead>([=]() {
+      acc_a[0] = NonExpPipe::read();
+      acc_b[0] = ExpPipe::read();
+    });
+  });
+  q.wait();
+
+  if (a != 42 || b != 24) {
+    std::cout << "Failed\n";
+    return 1;
+  }
+
+  std::cout << "Passed\n";
+  return 0;
+}