gcc/testsuite/c-c++-common/unroll-4.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2 -funroll-all-loops -fdump-rtl-loop2_unroll-details -fdump-tree-cunrolli-details" } */
   3
   4 extern void bar (int);
   5
   6 int j;
   7
   8 void test (void)
   9 {
  10   #pragma GCC unroll 0
  11   #pragma GCC ivdep
  12   for (unsigned long i = 1; i <= 3; ++i)
  13     bar(i);
  14
  15   #pragma GCC ivdep
  16   #pragma GCC unroll 0
  17   for (unsigned long i = 1; i <= j; ++i)
  18     bar(i);
  19
  20   /* { dg-final { scan-tree-dump "Not unrolling loop .: user didn't want it unrolled completely" "cunrolli" } } */
  21   /* { dg-final { scan-rtl-dump-times "Not unrolling loop, user didn't want it unrolled" 2 "loop2_unroll" } } */
  22 }