gcc/testsuite/gcc.dg/vect/pr69783.c

   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" } } */