gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-81.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2 -fdump-tree-fre1-details" } */
   3
   4 struct a
   5 {
   6   int foo,bar;
   7 };
   8 struct b
   9 {
  10   struct a a[10];
  11 };
  12 struct b b, *bptr=&b, *bptr2=&b;
  13 int j;
  14 int i;
  15 int n=1;
  16
  17 int
  18 main ()
  19 {
  20   int jj=j;
  21   bptr2->a[jj].bar = 0;
  22   for (int i=0; i<n; i++)
  23     bptr->a[i].foo=1;
  24   if (!__builtin_constant_p (bptr2->a[jj].bar == 0))
  25     __builtin_abort ();
  26   return 0;
  27 }
  28
  29 /* { dg-final { scan-tree-dump "Replaced __builtin_constant_p \\\(\[^)\]*\\\) with 1" "fre1" } } */