1  /* { dg-do compile } */
       2  /* { dg-options "-O -fdump-tree-cunroll-details -fdump-rtl-loop2_unroll-details" } */
       3  
       4  extern void bar (int);
       5  
       6  int j;
       7  
       8  void test (void)
       9  {
      10    #pragma GCC unroll 8
      11    for (unsigned long i = 1; i <= 8; ++i)
      12      bar(i);
      13    /* { dg-final { scan-tree-dump "11:.*: loop with 7 iterations completely unrolled" "cunroll" } } */
      14  
      15    #pragma GCC unroll 8
      16    for (unsigned long i = 1; i <= 7; ++i)
      17      bar(i);
      18    /* { dg-final { scan-tree-dump "16:.*: loop with 6 iterations completely unrolled" "cunroll" } } */
      19  
      20    #pragma GCC unroll 8
      21    for (unsigned long i = 1; i <= 15; ++i)
      22      bar(i);
      23    /* { dg-final { scan-rtl-dump "21:.*: optimized: loop unrolled 7 times" "loop2_unroll" } } */
      24  
      25    #pragma GCC unroll 8
      26    for (unsigned long i = 1; i <= j; ++i)
      27      bar(i);
      28    /* { dg-final { scan-rtl-dump "26:.*: optimized: loop unrolled 7 times" "loop2_unroll" } } */
      29  
      30    #pragma GCC unroll 7
      31    for (unsigned long i = 1; i <= j; ++i)
      32      bar(i);
      33    /* { dg-final { scan-rtl-dump "31:.*: optimized: loop unrolled 3 times" "loop2_unroll" } } */
      34  
      35    unsigned long i = 0;
      36    #pragma GCC unroll 3
      37    do {
      38      bar(i);
      39    } while (++i < 9);
      40    /* { dg-final { scan-rtl-dump "3\[79\]:.*: optimized: loop unrolled 2 times" "loop2_unroll" } } */
      41  }