gcc/testsuite/gcc.dg/graphite/interchange-8.c

   1 #define DEBUG 0
   2 #if DEBUG
   3 #include <stdio.h>
   4 #endif
   5
   6 int B[4];
   7 int A[4][4][4][4];
   8
   9 static int __attribute__((noinline))
  10 foo (void)
  11 {
  12   int i, j, k, l;
  13
  14   for (l = 0; l < 4; l++)
  15     {
  16       for (k = 0; k < 4; k++)
  17         {
  18           for (j = 0; j < 4; j++)
  19             {
  20               for (i = 0; i < 2; i++)
  21                 {
  22                   B[i] = A[i][k][j][l] + A[3 - i][k][j][l];
  23                   B[3 - i] = A[i][k][j][l] - A[3 - i][k][j][l];
  24                 }
  25               A[0][k][j][l] = B[0] + B[1];
  26               A[2][k][j][l] = B[0] - B[1];
  27               A[1][k][j][l] = B[3] + B[2];
  28               A[3][k][j][l] = B[3] - B[2];
  29             }
  30
  31           for (i = 0; i < 4; i++)
  32             {
  33               for (j = 0; j < 2; j++)
  34                 {
  35                   B[j] = A[i][k][j][l] + A[i][k][3 - j][l];
  36                   B[3 - j] = A[i][k][j][l] - A[i][k][3 - j][l];
  37                 }
  38               A[i][k][0][l] = B[0] + B[1];
  39               A[i][k][2][l] = B[0] - B[1];
  40               A[i][k][1][l] = B[3] + B[2];
  41               A[i][k][3][l] = B[3] - B[2];
  42             }
  43         }
  44     }
  45
  46   return A[0][1][0][2] + A[0][3][0][3] + A[0][2][0][2] + A[0][1][0][1] + A[3][3][0][2];
  47 }
  48
  49 extern void abort ();
  50
  51 int
  52 main (void)
  53 {
  54   int i, j, k, l, res;
  55
  56   for (i = 0; i < 4; i++)
  57     B[i] = 2;
  58
  59   for (i = 0; i < 4; i++)
  60     for (j = 0; j < 4; j++)
  61       for (k = 0; k < 4; k++)
  62         for (l = 0; l < 4; l++)
  63           A[i][j][k][l] = i + j + k + l;
  64
  65   res = foo ();
  66
  67 #if DEBUG
  68   for (i = 0; i < 4; i++)
  69     for (j = 0; j < 4; j++)
  70       for (k = 0; k < 4; k++)
  71         for (l = 0; l < 4; l++)
  72           fprintf (stderr, "A[%d][%d][%d][%d] = %d \n", i, j, k, l, A[i][j][k][l]);
  73
  74   fprintf (stderr, "res = %d \n", res);
  75 #endif
  76
  77   if (res != 424)
  78     abort ();
  79
  80   return 0;
  81 }
  82
  83 /* Loops K and L should be interchanged.  */
  84 /* { dg-final { scan-tree-dump-times "will be interchanged" 1 "graphite" { xfail *-*-* } } } */
  85 /* { dg-final { cleanup-tree-dump "graphite" } } */