gcc/testsuite/gcc.dg/pr67043.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O3 -fcompare-debug -w" } */
   3
   4 extern void rt_mutex_owner (void);
   5 extern void rt_mutex_deadlock_account_lock (int);
   6 extern void signal_pending (void);
   7 __typeof__ (int *) a;
   8 int b;
   9
  10 int
  11 try_to_take_rt_mutex (int p1) {
  12   rt_mutex_owner ();
  13   if (b)
  14     return 0;
  15   rt_mutex_deadlock_account_lock (p1);
  16   return 1;
  17 }
  18
  19 void
  20 __rt_mutex_slowlock (int p1) {
  21   int c;
  22   for (;;) {
  23     c = ({
  24       asm ("" : "=r"(a));
  25       a;
  26     });
  27     if (try_to_take_rt_mutex (c))
  28       break;
  29     if (__builtin_expect (p1 == 0, 0))
  30       signal_pending ();
  31   }
  32 }