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/* { dg-do compile } */

/* { dg-options "-O2 -ftree-parallelize-loops=4 -fdump-tree-parloops-details -fdump-tree-optimized" } */

#include <stdarg.h>

#include <stdlib.h>

#define N 1600

unsigned int ub[N];

unsigned int uc[N];

/* Reduction of unsigned-int.  */

__attribute__ ((noinline))

int main1 (int n, int res)

{

  int i;

  unsigned int udiff;

  udiff = 0;

  for (i = 0; i < n; i++) {

    udiff += (ub[i] - uc[i]);

  }

  /* check results:  */

  if (udiff != res)

    abort ();

  return 0;

}

__attribute__((noinline))

void init_arrays ()

{

  int i;

  for (i=0; i<N; i++)

    {

      ub[i] = i * 3;

      uc[i] = i;

    }

}

int main (void)

{

  init_arrays ();

  main1 (N, 2558400);

  main1 (N-1, 2555202);

  return 0;

}

/* { dg-final { scan-tree-dump-times "Detected reduction" 1 "parloops" } } */

/* { dg-final { scan-tree-dump-times "SUCCESS: may be parallelized" 2 "parloops" } } */

/* { dg-final { cleanup-tree-dump "parloops" } } */

/* { dg-final { cleanup-tree-dump "optimized" } } */