gcc/testsuite/gcc.dg/pr33673.c

   1 /* PR rtl-optimization/33673 */
   2 /* { dg-do compile } */
   3 /* { dg-options "-Os -fno-forward-propagate -fno-guess-branch-probability -fno-move-loop-invariants -fno-tree-dominator-opts -fno-tree-loop-optimize" } */
   4
   5 extern int f1 (int);
   6 extern int f2 (int);
   7
   8 extern int *a;
   9
  10 static void
  11 find_reg (int n)
  12 {
  13   int i, pass;
  14   unsigned int used[2], used1[2];
  15
  16   int c = n ? f1 (a[1]) : f2 (a[1]);
  17
  18   for (i = 64, pass = 0; pass <= 1 && i >= 64; pass++)
  19     {
  20       if (pass == 1)
  21         {
  22           unsigned int *scan_tp_ = used;
  23           unsigned int *scan_fp_ = used1;
  24           int j;
  25           for (j = 0; j < 2; j++)
  26             *scan_tp_++ = *scan_fp_++;
  27         }
  28       for (i = 0; i < 64; i++)
  29         {
  30           int regno = i;
  31           if (n == 0)
  32             if (i == regno)
  33               break;
  34         }
  35     }
  36 }
  37
  38 void
  39 global_alloc ()
  40 {
  41   find_reg (0);
  42   find_reg (1);
  43 }