1  /* { dg-do compile } */
       2  /* { dg-options "-O2 -ftree-parallelize-loops=4 -fdump-tree-parloops2-details -fdump-tree-optimized" } */
       3  
       4  #include <stdarg.h>
       5  #include <stdlib.h>
       6  
       7  #define N 1600
       8  #define DIFF 2558400
       9  
      10  int b[N];
      11  int c[N];
      12  
      13  /* Reduction of signed-int.  */
      14  
      15  __attribute__ ((noinline))
      16  void main1 (int x, int max_result, int min_result)
      17  {
      18    int i;
      19    int diff = 0;
      20    int max = x;
      21    int min = x;
      22  
      23    for (i = 0; i < N; i++) {
      24      diff += (b[i] - c[i]);
      25    }
      26  
      27    for (i = 0; i < N; i++) {
      28      max = max < c[i] ? c[i] : max;
      29    }
      30  
      31    for (i = 0; i < N; i++) {
      32      min = min > c[i] ? c[i] : min;
      33    }
      34    
      35    /* check results:  */
      36    if (diff != DIFF)
      37      abort ();
      38    if (max != max_result)
      39      abort ();
      40    if (min != min_result)
      41      abort ();
      42  }
      43  
      44   __attribute__((noinline))
      45   void init_arrays ()
      46   {
      47     int i;
      48  
      49     b[0] = 1;
      50     c[0] = 1;
      51     for (i=1; i<N; i++)
      52       {
      53         b[i] = i * 3;
      54         c[i] = i;
      55       }
      56  }
      57  
      58  int main (void)
      59  { 
      60    init_arrays ();
      61    main1 (2000, 2000, 1);
      62    main1 (0, 1599, 0);
      63    return 0;
      64  }
      65  
      66  /* { dg-final { scan-tree-dump-times "Detected reduction" 3 "parloops2" { xfail *-*-* } } } */
      67  /* { dg-final { scan-tree-dump-times "SUCCESS: may be parallelized" 4 "parloops2" { xfail *-*-* } } } */
      68