gcc/testsuite/gcc.dg/ipa/ipcp-3.c

   1 /* Verify that IPA-CP can clone mark_cell without miscompiling it despite its
   2    type_attributes.  */
   3 /* { dg-do run } */
   4 /* { dg-options "-O3 -fdump-ipa-cp" } */
   5
   6
   7 struct PMC {
   8     unsigned flags;
   9 };
  10
  11 typedef struct Pcc_cell
  12 {
  13     struct PMC *p;
  14     long bla;
  15     long type;
  16 } Pcc_cell;
  17
  18 int gi;
  19
  20 extern void abort ();
  21 extern void never_ever(int * interp, struct PMC *pmc)
  22      __attribute__((noinline));
  23
  24 void never_ever (int * interp, struct PMC *pmc)
  25 {
  26   abort ();
  27 }
  28
  29 static void mark_cell(int * interp, Pcc_cell *c)
  30         __attribute__((__nonnull__(1)))
  31         __attribute__((noinline));
  32
  33 static void
  34 mark_cell(int * interp, Pcc_cell *c)
  35 {
  36   if (c && c->type == 4 && c->p
  37       && !(c->p->flags & (1<<14)))
  38     never_ever(interp, c->p);
  39 }
  40
  41 static void foo(int * interp, Pcc_cell *c)
  42   __attribute__((noinline));
  43
  44 static void
  45 foo(int * interp, Pcc_cell *c)
  46 {
  47   mark_cell(interp, c);
  48 }
  49
  50 static struct Pcc_cell *
  51 __attribute__((noinline,noclone))
  52 getnull(void)
  53 {
  54   return (struct Pcc_cell *) 0;
  55 }
  56
  57
  58 int main()
  59 {
  60   int i;
  61
  62   for (i = 0; i < 100; i++)
  63     foo (&gi, getnull ());
  64   return 0;
  65 }
  66
  67
  68 /* { dg-final { scan-ipa-dump "Creating a specialized node of mark_cell" "cp" } } */
  69