gcc/testsuite/gcc.target/i386/pr61923.c

   1 /* PR debug/61923 */
   2 /* { dg-do compile } */
   3 /* { dg-options "-O2 -fcompare-debug" } */
   4
   5 typedef struct
   6 {
   7   struct
   8   {
   9     struct
  10     {
  11       char head;
  12     } tickets;
  13   };
  14 } arch_spinlock_t;
  15 struct ext4_map_blocks
  16 {
  17   int m_lblk;
  18   int m_len;
  19   int m_flags;
  20 };
  21 int ext4_da_map_blocks_ei_0;
  22 void fn2 (int, int);
  23 void fn1 (int p1, struct ext4_map_blocks *p2)
  24 {
  25   int ret;
  26   if (p2->m_flags)
  27     {
  28       ext4_da_map_blocks_ei_0++;
  29       arch_spinlock_t *lock;
  30       switch (sizeof *&lock->tickets.head)
  31       case 1:
  32       asm("" : "+m"(*&lock->tickets.head) : ""(0));
  33       __asm__("");
  34       ret = 0;
  35     }
  36   fn2 (p2->m_lblk, p2->m_len);
  37 }