/* Check some way in where code suppression caused various   miscompilations.  */extern int printf (const char *, ...);typedef unsigned long size_t; size_t _brk_start, _brk_end;void * extend_brk(size_t size, size_t align){    size_t mask = align - 1;    void *ret = 0;      do {	 if (__builtin_expect(!!(_brk_start == 0), 0))	   do {	       printf("wrong1\n");	   } while (0);     } while (0);     _brk_end = (_brk_end + mask) & ~mask;     ret = (void *)_brk_end;     _brk_end += size;      return ret;} static void get_args (int a, int b){  if (a != 1)    printf("wrong2\n");  else    printf("okay\n");} void bla(void){  int __ret = 42;  ({    if (__builtin_expect(!!(0), 0)) {      if (__builtin_expect(!!__ret, 0))        printf("wrong3\n");      int x = !!(__ret);    }    __ret;  });  get_args(!!__ret, sizeof(__ret));} _Bool chk(unsigned long addr, unsigned long limit, unsigned long size){  _Bool ret;  /* This just needs to compile, no runtime test.  (And it doesn't compile     only with certain internal checking added that's not committed).  */  if (0)    ret = 0 != (!!(addr > limit - size));} int main(){  void *r;  _brk_start = 1024;  _brk_end = 1024;  r = extend_brk (4096, 16);  if (!r)    printf("wrong4\n");  else    printf("okay\n");  bla();  return 0;}