gcc/testsuite/gcc.c-torture/execute/20020529-1.c

   1 /* PR target/6838 from cato@df.lth.se.
   2    cris-elf got an ICE with -O2: the insn matching
   3       (insn 49 48 52 (parallel[
   4                   (set (mem/s:HI (plus:SI (reg/v/f:SI 0 r0 [24])
   5                               (const_int 8 [0x8])) [5 <variable>.c+0 S2 A8])
   6                       (reg:HI 2 r2 [27]))
   7                   (set (reg/f:SI 2 r2 [31])
   8                       (plus:SI (reg/v/f:SI 0 r0 [24])
   9                           (const_int 8 [0x8])))
  10               ] ) 24 {*mov_sidehi_mem} (nil)
  11           (nil))
  12    forced a splitter through the output pattern "#", but there was no
  13    matching splitter.  */
  14
  15 /* The ptx assembler appears to clobber 'b' inside foo during the f1 call.
  16    Reported to nvidia 2016-05-18.  */
  17 /* { dg-skip-if "PTX assembler bug" { nvptx-*-* } { "-O0" } { "" } } */
  18
  19 struct xx
  20  {
  21    int a;
  22    struct xx *b;
  23    short c;
  24  };
  25
  26 int f1 (struct xx *);
  27 void f2 (void);
  28
  29 int
  30 foo (struct xx *p, int b, int c, int d)
  31 {
  32   int a;
  33
  34   for (;;)
  35     {
  36       a = f1(p);
  37       if (a)
  38         return (0);
  39       if (b)
  40         continue;
  41       p->c = d;
  42       if (p->a)
  43         f2 ();
  44       if (c)
  45         f2 ();
  46       d = p->c;
  47       switch (a)
  48         {
  49         case 1:
  50           if (p->b)
  51             f2 ();
  52           if (c)
  53             f2 ();
  54         default:
  55           break;
  56         }
  57     }
  58   return d;
  59 }
  60
  61 int main (void)
  62 {
  63   struct xx s = {0, &s, 23};
  64   if (foo (&s, 0, 0, 0) != 0 || s.a != 0 || s.b != &s || s.c != 0)
  65     abort ();
  66   exit (0);
  67 }
  68
  69 int
  70 f1 (struct xx *p)
  71 {
  72   static int beenhere = 0;
  73   if (beenhere++ > 1)
  74     abort ();
  75   return beenhere > 1;
  76 }
  77
  78 void
  79 f2 (void)
  80 {
  81   abort ();
  82 }