sources/cxx-stl/llvm-libc++/test/libcxx/utilities/function.objects/unord.hash/murmur2_or_cityhash_ubsan_unsigned_overflow_ignored.pass.cpp

//===----------------------------------------------------------------------===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//

// Test that UBSAN doesn't generate unsigned integer overflow diagnostics
// from within the hashing internals.

#include <utility>
#include <cstdint>
#include <limits>
#include <string>

#include "test_macros.h"

typedef std::__murmur2_or_cityhash<uint32_t> Hash32;
typedef std::__murmur2_or_cityhash<uint64_t> Hash64;

void test(const void* key, int len) {
  for (int i=1; i <= len; ++i) {
    Hash32 h1;
    Hash64 h2;
    DoNotOptimize(h1(key, i));
    DoNotOptimize(h2(key, i));
  }
}

int main() {
  const std::string TestCases[] = {
      "abcdaoeuaoeclaoeoaeuaoeuaousaotehu]+}sthoasuthaoesutahoesutaohesutaoeusaoetuhasoetuhaoseutaoseuthaoesutaohes"
      "00000000000000000000000000000000000000000000000000000000000000000000000",
      "1237546895+54+4554985416849484213464984765465464654564565645645646546456546546"
  };
  const size_t NumCases = sizeof(TestCases)/sizeof(TestCases[0]);
  for (size_t i=0; i < NumCases; ++i)
    test(TestCases[i].data(), TestCases[i].length());
}