gcc/testsuite/gcc.dg/tree-ssa/ssa-dom-cse-2.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O3 -fno-tree-fre -fno-tree-pre -fdump-tree-optimized" } */
   3
   4 int
   5 foo ()
   6 {
   7   const int a[8] = { 0, 1, 2, 3, 4, 5, 6, 7 };
   8   int i, sum;
   9
  10   sum = 0;
  11   for (i = 0; i < sizeof (a) / sizeof (*a); i++)
  12     sum += a[i];
  13
  14   return sum;
  15 }
  16
  17 /* After late unrolling the above loop completely DOM should be
  18    able to optimize this to return 28.  */
  19
  20 /* See PR63679 and PR64159, if the target forces the initializer to memory then
  21    DOM is not able to perform this optimization.  */
  22
  23 /* { dg-final { scan-tree-dump "return 28;" "optimized" { xfail hppa*-*-* powerpc*-*-* sparc*-*-*} } } */
  24 /* { dg-final { cleanup-tree-dump "optimized" } } */