gcc/testsuite/gcc.dg/tree-ssa/20030917-2.c

   1 /* This test was causing an ICE in DCE because we were allowing void *
   2    pointers to have a memory tag, which we were copying when doing copy
   3    propagation.  Since void * can never be de-referenced, its memory tag
   4    was never renamed.  */
   5
   6 /* { dg-do compile } */
   7 /* { dg-options "-O -ftree-dominator-opts" } */
   8
   9 typedef __SIZE_TYPE__ size_t;
  10 typedef union tree_node *tree;
  11 struct operands_d
  12 {
  13   tree *def_op;
  14 };
  15
  16 void
  17 gt_ggc_mx_operands_d (void *x_p)
  18 {
  19   struct operands_d *const x = (struct operands_d *) x_p;
  20   if ((*x).def_op != ((void *) 0))
  21     {
  22       size_t i0;
  23       do
  24         {
  25           const void *const a__ = ((*x).def_op);
  26           if (a__ != ((void *) 0) && a__ != (void *) 1)
  27             ggc_set_mark (a__);
  28         }
  29       while (0);
  30       for (i0 = 0; i0 < (size_t) (1); i0++)
  31         {
  32           do
  33             {
  34               if ((void *) (*x).def_op[i0] != ((void *) 0))
  35                 gt_ggc_mx_lang_tree_node ((*x).def_op[i0]);
  36             }
  37           while (0);
  38         }
  39     }
  40 }