gcc/testsuite/gcc.dg/delay-slot-1.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2" } */
   3 /* { dg-options "-O2 -mabi=64" { target mips-*-linux-* } } */
   4
   5 struct offset_v1 {
   6     int k_uniqueness;
   7 };
   8
   9 struct offset_v2 {
  10  long v;
  11 } __attribute__ ((__packed__));
  12
  13 struct reiserfs_key {
  14     int k_objectid;
  15     union {
  16  struct offset_v1 k_offset_v1;
  17  struct offset_v2 k_offset_v2;
  18     } u;
  19 };
  20
  21 struct item_head
  22 {
  23  struct reiserfs_key ih_key;
  24  int ih_version;
  25 };
  26
  27 static void set_offset_v2_k_type(struct offset_v2 *v2)
  28 {
  29     v2->v &= 1;
  30 }
  31
  32 static void set_le_key_k_type (int version, struct reiserfs_key * key)
  33 {
  34     version ? (key->u.k_offset_v1.k_uniqueness = 1)
  35             : set_offset_v2_k_type(&(key->u.k_offset_v2));
  36 }
  37
  38 static void set_le_ih_k_type (struct item_head * ih)
  39 {
  40     set_le_key_k_type((__builtin_constant_p((ih)->ih_version) ? (ih)->ih_version : (ih)->ih_version), &(ih->ih_key));
  41 }
  42
  43 void boo(struct item_head *ih, const char *body);
  44
  45 void direct2indirect(void)
  46 {
  47     struct item_head *p_le_ih;
  48     struct item_head ind_ih;
  49     unsigned int unfm_ptr;
  50
  51     if (__builtin_expect(32, 0)) __asm__ ("break");
  52
  53     set_le_ih_k_type (&ind_ih);
  54
  55     if (__builtin_constant_p(p_le_ih) ? 1 : 2) {
  56         (__builtin_constant_p(__builtin_constant_p(1) == 1));
  57       boo(&ind_ih, (char *)&unfm_ptr);
  58     }
  59 }