[Bug middle-end/104069] -Werror=use-after-free false positive on elfutils-0.186

[msebor at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104069

--- Comment #17 from Martin Sebor <msebor at gcc dot gnu.org> ---
Having spent some time trying to understand the function I think the following
simplification should capture its intent.  It compiles without warnings at all
levels:

void *xrealloc (void *ptr, size_t size)
{
  void *ret = __builtin_realloc (ptr, size);
  if (ret)
    return ret;

  if (!size)
    size = 1;

  ret = __builtin_realloc (ptr, size);
  if (ret)
    return ret;

  __builtin_abort ();
}