gcc/testsuite/gcc.target/arm/pr53636.c

   1 /* { dg-do run } */
   2 /* { dg-require-effective-target arm_neon_hw } */
   3 /* { dg-options "-O -ftree-vectorize" } */
   4 /* { dg-add-options arm_neon } */
   5
   6 void fill (short *buf) __attribute__ ((noinline));
   7 void fill (short *buf)
   8 {
   9   int i;
  10
  11   for (i = 0; i < 11 * 8; i++)
  12     buf[i] = i;
  13 }
  14
  15 void test (unsigned char *dst) __attribute__ ((noinline));
  16 void test (unsigned char *dst)
  17 {
  18   short tmp[11 * 8], *tptr;
  19   int i;
  20
  21   fill (tmp);
  22
  23   tptr = tmp;
  24   for (i = 0; i < 8; i++)
  25     {
  26       dst[0] = (-tptr[0] + 9 * tptr[0 + 1] + 9 * tptr[0 + 2] - tptr[0 + 3]) >> 7;
  27       dst[1] = (-tptr[1] + 9 * tptr[1 + 1] + 9 * tptr[1 + 2] - tptr[1 + 3]) >> 7;
  28       dst[2] = (-tptr[2] + 9 * tptr[2 + 1] + 9 * tptr[2 + 2] - tptr[2 + 3]) >> 7;
  29       dst[3] = (-tptr[3] + 9 * tptr[3 + 1] + 9 * tptr[3 + 2] - tptr[3 + 3]) >> 7;
  30       dst[4] = (-tptr[4] + 9 * tptr[4 + 1] + 9 * tptr[4 + 2] - tptr[4 + 3]) >> 7;
  31       dst[5] = (-tptr[5] + 9 * tptr[5 + 1] + 9 * tptr[5 + 2] - tptr[5 + 3]) >> 7;
  32       dst[6] = (-tptr[6] + 9 * tptr[6 + 1] + 9 * tptr[6 + 2] - tptr[6 + 3]) >> 7;
  33       dst[7] = (-tptr[7] + 9 * tptr[7 + 1] + 9 * tptr[7 + 2] - tptr[7 + 3]) >> 7;
  34
  35       dst += 8;
  36       tptr += 11;
  37     }
  38 }
  39
  40 int main (void)
  41 {
  42   char buf [8 * 8];
  43
  44   test (buf);
  45
  46   return 0;
  47 }
  48