gcc/testsuite/gcc.dg/pr65063.c

   1 /* { dg-do run } */
   2 /* { dg-options "-O3 -fno-tree-loop-ivcanon -fno-tree-vectorize" } */
   3
   4 static int in[8][4];
   5 static int out[4];
   6 static const int check_result[] = {0, 16, 256, 4096};
   7
   8 static inline void foo ()
   9 {
  10   int sum;
  11   int i, j, k;
  12   for (k = 0; k < 4; k++)
  13     {
  14       sum = 1;
  15       for (j = 0; j < 4; j++)
  16         for (i = 0; i < 4; i++)
  17           sum *= in[i + k][j];
  18       out[k] = sum;
  19     }
  20 }
  21
  22 int main ()
  23 {
  24   int i, j, k;
  25   for (i = 0; i < 8; i++)
  26     for (j = 0; j < 4; j++)
  27       in[i][j] = (i + 2) / 3;
  28   foo ();
  29   for (k = 0; k < 4; k++)
  30     if (out[k] != check_result[k])
  31       __builtin_abort ();
  32   return 0;
  33 }