1  /* { dg-do compile } */
       2  /* { dg-require-effective-target vect_float } */
       3  /* { dg-additional-options "-Ofast -funroll-loops" } */
       4  
       5  #define NXX 516
       6  #define NYY 516
       7  #define IND(x,y) ((x) + (y)*NXX)
       8  float **In, **Out, **V;
       9  
      10  void foo(int I, int J, int K1, int K2, int L1, int L2 )
      11  {
      12    for(int i=0; i < I; i++)
      13      {
      14        float *v = V[i];
      15  
      16        for(int j=0; j < J; j++)
      17  	{
      18  	  float *in = In[j];
      19  	  float *out = Out[j];
      20  	  for(int l=L1; l<L2; l++)
      21  	    {
      22  	      for(int k=K1; k<K2; k++)
      23  		{
      24  		  float sum = 0;
      25  		  int offset = 0;
      26  		  for(int m=-2; m<=2; m++)
      27  		    {
      28  		      for(int n=-2; n<=2; n++, offset++)
      29  			sum += in[IND((k+n), (l+m))] * v[offset];
      30  		    }
      31  		  out[IND(k,l)] = sum;
      32  		}
      33  	    }
      34  
      35  	}
      36      }
      37  }
      38  
      39  /* { dg-final { scan-tree-dump "improved number of alias checks from \[0-9\]* to 2" "vect" } } */