gnu/dist/gcc4/gcc/testsuite/gcc.c-torture/execute/pr15296.c

   1 /* PR optimization/15296.  The delayed-branch scheduler caused code that
   2    SEGV:d for CRIS; a register was set to -1 in a delay-slot for the
   3    fall-through code, while that register held a pointer used in code at
   4    the branch target.  */
   5
   6 typedef int __attribute__ ((mode (__pointer__))) intptr_t;
   7 typedef intptr_t W;
   8 union u0
   9 {
  10   union u0 *r;
  11   W i;
  12 };
  13 struct s1
  14 {
  15   union u0 **m0;
  16   union u0 m1[4];
  17 };
  18
  19 void f (void *, struct s1 *, const union u0 *, W, W, W)
  20      __attribute__ ((__noinline__));
  21 void g (void *, char *) __attribute__ ((__noinline__));
  22
  23 void
  24 f (void *a, struct s1 *b, const union u0 *h, W v0, W v1, W v4)
  25 {
  26   union u0 *e = 0;
  27   union u0 *k = 0;
  28   union u0 **v5 = b->m0;
  29   union u0 *c = b->m1;
  30   union u0 **d = &v5[0];
  31 l0:;
  32   if (v0 < v1)
  33     goto l0;
  34   if (v0 == 0)
  35     goto l3;
  36   v0 = v4;
  37   if (v0 != 0)
  38     goto l3;
  39   c[0].r = *d;
  40   v1 = -1;
  41   e = c[0].r;
  42   if (e != 0)
  43     g (a, "");
  44   k = e + 3;
  45   k->i = v1;
  46   goto l4;
  47 l3:;
  48   c[0].i = v0;
  49   e = c[1].r;
  50   if (e != 0)
  51     g (a, "");
  52   e = c[0].r;
  53   if (e == 0)
  54     g (a, "");
  55   k = e + 2;
  56   k->r = c[1].r;
  57 l4:;
  58 }
  59
  60 void g (void *a, char *b) { abort (); }
  61
  62 int
  63 main ()
  64 {
  65   union u0 uv[] = {{ .i = 111 }, { .i = 222 }, { .i = 333 }, { .i = 444 }};
  66   struct s1 s = { 0, {{ .i = 555 }, { .i = 0 }, { .i = 999 }, { .i = 777 }}};
  67   f (0, &s, 0, 20000, 10000, (W) uv);
  68   if (s.m1[0].i != (W) uv || s.m1[1].i != 0 || s.m1[2].i != 999
  69       || s.m1[3].i != 777 || uv[0].i != 111 || uv[1].i != 222
  70       || uv[2].i != 0 || uv[3].i != 444)
  71     abort ();
  72   exit (0);
  73 }