1  /* { dg-do compile } */
       2  /* { dg-options "-O2 -fdump-rtl-loop2_unroll-optimized" } */
       3  
       4  /* The pragma specified for foo2 should not affect foo1.
       5     Verify compiler won't perform unrolling for foo1.  */
       6  
       7  #define N 1024
       8  extern int a1[N], b1[N], c1[N];
       9  extern int a2[N], b2[N], c2[N];
      10  extern int n;
      11  
      12  void
      13  foo1 ()
      14  {
      15    int i;
      16    for (i = 0; i < n; i++)
      17      c1[i] += a1[i] + b1[i];
      18  }
      19  
      20  #pragma GCC optimize("O3,unroll-loops")
      21  void
      22  foo2 ()
      23  {
      24    int i;
      25    for (i = 0; i < n; i++)
      26      c2[i] += a2[i] + b2[i];
      27  }
      28  
      29  /* { dg-final { scan-rtl-dump-times "optimized: loop unrolled" 1 "loop2_unroll" } } */
      30