gcc/testsuite/gcc.dg/vect/pr81633.c

   1 static double identity[4][4] = {{1, 0, 0, 0},
   2                                 {0, 1, 0, 0},
   3                                 {0, 0, 1, 0},
   4                                 {0, 0, 0, 1}};
   5 static double expected[4][4] = {{1, 0, 0, 0},
   6                                 {0, 0, 0, 0},
   7                                 {0, 0, 0, 0},
   8                                 {0, 0, 0, 0}};
   9
  10 static void __attribute__((noinline,noclone))
  11 kernel(double A[4][4])
  12 {
  13   double tmp[4][4];
  14   for (int j = 0; j < 4; j++)
  15     for (int k = 0; k < 4; k++)
  16       tmp[j][k] = identity[j][0] * identity[j][k];
  17   for (int j = 0; j < 4; j++ )
  18     for (int k = 0; k < 4; k++)
  19       A[j][k] = tmp[j][k];
  20 }
  21
  22 int main(void)
  23 {
  24   double A[4][4] = {{0.0}};
  25   kernel(A);
  26   for ( int i = 0; i < 4; i++ )
  27     for ( int j = 0; j < 4; j++ )
  28       if (A[i][j] != expected[i][j])
  29         __builtin_abort ();
  30   return 0;
  31 }