gcc/testsuite/gcc.dg/tree-ssa/ssa-dse-33.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O -fdump-tree-dse1-details" } */
   3
   4 void f(char *p, int n)
   5 {
   6   for (int i = 0; i < n; ++i)
   7     *p = 0;  /* Removed by DSE.  */
   8   *p = 1;
   9 }
  10
  11 void g(char *p, int n)
  12 {
  13   int i = 0;
  14   do
  15     *p = 0;  /* Not yet removed by DSE.  */
  16   while (++i < n);
  17   *p = 1;
  18 }
  19
  20
  21 /* { dg-final { scan-tree-dump-times "Deleted dead store" 2 "dse1" { xfail *-*-* } } } */
  22 /* { dg-final { scan-tree-dump-times "Deleted dead store" 1 "dse1" } } */