gcc/testsuite/gcc.c-torture/execute/20061220-1.c

   1 /* PR middle-end/30262 */
   2 extern void abort (void);
   3
   4 int
   5 foo (void)
   6 {
   7   unsigned int x = 0;
   8
   9   void nested (void)
  10   {
  11     x = 254;
  12   }
  13
  14   nested ();
  15   asm volatile ("" :: "r" (x));
  16   asm volatile ("" :: "m" (x));
  17   asm volatile ("" :: "mr" (x));
  18   asm volatile ("" : "=r" (x) : "0" (x));
  19   asm volatile ("" : "=m" (x) : "m" (x));
  20   return x;
  21 }
  22
  23 int
  24 bar (void)
  25 {
  26   unsigned int x = 0;
  27
  28   void nested (void)
  29   {
  30     asm volatile ("" :: "r" (x));
  31     asm volatile ("" :: "m" (x));
  32     asm volatile ("" :: "mr" (x));
  33     x += 4;
  34     asm volatile ("" : "=r" (x) : "0" (x));
  35     asm volatile ("" : "=m" (x) : "m" (x));
  36   }
  37
  38   nested ();
  39   return x;
  40 }
  41
  42 int
  43 baz (void)
  44 {
  45   unsigned int x = 0;
  46
  47   void nested (void)
  48   {
  49     void nested2 (void)
  50     {
  51       asm volatile ("" :: "r" (x));
  52       asm volatile ("" :: "m" (x));
  53       asm volatile ("" :: "mr" (x));
  54       x += 4;
  55       asm volatile ("" : "=r" (x) : "0" (x));
  56       asm volatile ("" : "=m" (x) : "m" (x));
  57     }
  58     nested2 ();
  59     nested2 ();
  60   }
  61
  62   nested ();
  63   return x;
  64 }
  65
  66 int
  67 main (void)
  68 {
  69   if (foo () != 254 || bar () != 4 || baz () != 8)
  70     abort ();
  71   return 0;
  72 }