gcc/testsuite/gcc.dg/vect/vect-outer-4i.c

   1 /* { dg-require-effective-target vect_int } */
   2
   3 #include <stdarg.h>
   4 #include "tree-vect.h"
   5
   6 #define N 96
   7 #define M 128
   8 unsigned char in[N+M];
   9 unsigned short out[N];
  10
  11 /* Outer-loop vectorization. */
  12 /* Multiple-types in the inner-loop.  */
  13
  14 __attribute__ ((noinline))
  15 unsigned short
  16 foo (){
  17   int i,j;
  18   unsigned short diff;
  19   unsigned short s=0;
  20
  21   for (i = 0; i < N; i++) {
  22     diff = 0;
  23     for (j = 0; j < M; j+=8) {
  24       diff += in[j+i];
  25     }
  26     s+=diff;
  27   }
  28   return s;
  29 }
  30
  31 int main (void)
  32 {
  33   check_vect ();
  34   int i;
  35   unsigned short s;
  36
  37   for (i = 0; i < N+M; i++)
  38     in[i] = (unsigned char)i;
  39
  40   s = foo ();
  41
  42   if (s != 34048)
  43     abort ();
  44
  45   return 0;
  46 }
  47
  48 /* { dg-final { scan-tree-dump-times "OUTER LOOP VECTORIZED" 1 "vect" { target vect_unpack } } } */