[Bug rtl-optimization/117532] [15 Regression] Miscompile with -Os and -O0/1/2/3

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=117532

--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Modified testcase for testsuite:
int a, c = -1;

__attribute__((noipa)) void
foo (int x)
{
  if (x)
    __builtin_abort ();
}

int
main ()
{
  a = ~c;
  foo ((unsigned char) a);
}