gcc/testsuite/gcc.dg/unroll-9.c

   1 /* { dg-options "-O3 -fdump-tree-unrolljam -fno-math-errno" } */
   2
   3 void
   4 f (float *restrict x, float y[100][100])
   5 {
   6   for (int j = 0; j < 100; ++j)
   7     for (int i = 0; i < 100; ++i)
   8       x[i] += __builtin_expf (y[j][i]);
   9 }
  10
  11 /* The loop should be unrolled 2 times, without a tail loop.  */
  12 /* { dg-final { scan-tree-dump-times "__builtin_expf" 2 "unrolljam" } } */