modernc.org/cc@v1.0.1/testdata/gcc-6.3.0/gcc/testsuite/gcc.c-torture/compile/pr42398.c (about)

     1  int ptrace_setregs(void)
     2  {
     3    union { unsigned int l; int t; } __gu_tmp;
     4    __asm__ __volatile__("" : "=r" (__gu_tmp.l));
     5    return __gu_tmp.t;
     6  }