gcc/testsuite/gcc.dg/vect/vect-strided-a-u8-i8-gap7.c

   1 /* { dg-require-effective-target vect_int } */
   2
   3 #include <stdarg.h>
   4 #include "tree-vect.h"
   5
   6 #define N 16
   7
   8 typedef struct {
   9    unsigned char a;
  10    unsigned char b;
  11    unsigned char c;
  12    unsigned char d;
  13    unsigned char e;
  14    unsigned char f;
  15    unsigned char g;
  16    unsigned char h;
  17 } s;
  18
  19 __attribute__ ((noinline)) int
  20 main1 ()
  21 {
  22   int i;
  23   s arr[N];
  24   s *ptr = arr;
  25   s res[N];
  26   unsigned char u, t, s, x, z, w;
  27
  28   for (i = 0; i < N; i++)
  29     {
  30       arr[i].a = i;
  31       arr[i].b = i * 2;
  32       arr[i].c = 17;
  33       arr[i].d = i+34;
  34       arr[i].e = i * 3 + 5;
  35       arr[i].f = i * 5;
  36       arr[i].g = i - 3;
  37       arr[i].h = 67;
  38       asm volatile ("" ::: "memory");
  39     }
  40
  41   for (i = 0; i < N; i++)
  42     {
  43       u = ptr->b - ptr->a;
  44       t = ptr->d - ptr->c;
  45       res[i].c = u + t;
  46       x = ptr->b + ptr->d;
  47       res[i].a = ptr->a + x;
  48       res[i].d = u + t;
  49       s = ptr->h - ptr->a;
  50       res[i].b = s + t;
  51       res[i].f = ptr->f + ptr->h;
  52       res[i].e = ptr->b + ptr->e;
  53       res[i].h = ptr->d;
  54       res[i].g = u + t;
  55       ptr++;
  56     }
  57
  58   /* check results:  */
  59 #pragma GCC novector
  60   for (i = 0; i < N; i++)
  61     {
  62       if (res[i].c != arr[i].b - arr[i].a + arr[i].d - arr[i].c
  63           || res[i].a != arr[i].a + arr[i].b + arr[i].d
  64           || res[i].d != arr[i].b - arr[i].a + arr[i].d - arr[i].c
  65           || res[i].b != arr[i].h - arr[i].a + arr[i].d - arr[i].c
  66           || res[i].f != arr[i].f + arr[i].h
  67           || res[i].e != arr[i].b + arr[i].e
  68           || res[i].h != arr[i].d
  69           || res[i].g != arr[i].b - arr[i].a + arr[i].d - arr[i].c)
  70          abort();
  71    }
  72 }
  73
  74
  75 int main (void)
  76 {
  77   check_vect ();
  78
  79   main1 ();
  80
  81   return 0;
  82 }
  83
  84 /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" { target vect_strided8 } } } */
  85