gcc/testsuite/gcc.dg/tree-ssa/cunroll-13.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O3 -fdisable-tree-evrp -fdisable-tree-cunrolli -fdisable-tree-vrp1 -fdump-tree-cunroll-blocks-details" } */
   3
   4 #if __SIZEOF_INT__ < 4
   5 __extension__ typedef __INT32_TYPE__ i32;
   6 #else
   7 typedef int i32;
   8 #endif
   9
  10 struct a {int a[8];int b;};
  11 void
  12 t(struct a *a)
  13 {
  14   for (i32 i=0;i<123456 && a->a[i];i++)
  15     a->a[i]++;
  16 }
  17 /* This pass relies on the fact that we do not eliminate the redundant test for i early.
  18    It is necessary to disable all passes that do so.  At the moment it is evrp, vrp1 and cunrolli.  */
  19 /* { dg-final { scan-tree-dump-times "Loop 1 iterates 123454 times" 1 "cunroll" } } */
  20 /* { dg-final { scan-tree-dump-times "Last iteration exit edge was proved true" 1 "cunroll" } } */
  21 /* { dg-final { scan-tree-dump-times "Exit condition of peeled iterations was eliminated" 1 "cunroll" } } */
  22 /* { dg-final { scan-tree-dump-times "loop with 6 iterations completely unrolled" 1 "cunroll" } } */
  23 /* { dg-final { scan-tree-dump-not "Invalid sum" "cunroll" } } */