test_CompilerBuiltins.cxx

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// Copyright 2019-2020 CERN and copyright holders of ALICE O2.
// See https://alice-o2.web.cern.ch/copyright for details of the copyright holders.
// All rights not expressly granted are reserved.
//
// This software is distributed under the terms of the GNU General Public
// License v3 (GPL Version 3), copied verbatim in the file "COPYING".
//
// In applying this license CERN does not waive the privileges and immunities
// granted to it by virtue of its status as an Intergovernmental Organization
// or submit itself to any jurisdiction.
 
#include <catch_amalgamated.hpp>
#include "Framework/CompilerBuiltins.h"
 
struct Foo {
  int foo;
  int O2_VISIBILITY_HIDDEN someHiddenMethod() { return 0; };
};
 
struct O2_VISIBILITY_HIDDEN Bar {
  int someMethod() { return 0; };
};
 
TEST_CASE("TestPrefetch")
{
  int a[10];
  int b[10];
 
  [[maybe_unused]] Foo foo;
  [[maybe_unused]] Bar bar;
 
  for (int i = 0; i < 10; i++) {
    a[i] = a[i] + b[i];
    O2_BUILTIN_PREFETCH(&a[i + 1], 1, 1);
    O2_BUILTIN_PREFETCH(&b[i + 1], 0, 1);
    /* … */
  }
}