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

   1 /* { dg-require-effective-target vect_int } */
   2
   3 #include <stdarg.h>
   4 #include "tree-vect.h"
   5
   6 #define N 32
   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 (s *arr)
  21 {
  22   int i;
  23   s *ptr = arr;
  24   s res[N];
  25   unsigned char u, t, s, x, y, z, w;
  26
  27   for (i = 0; i < N; i++)
  28     {
  29       u = ptr->b - ptr->a;
  30       t = ptr->d - ptr->c;
  31       res[i].c = u + t;
  32       s =  ptr->a + ptr->g;
  33       x = ptr->b + ptr->d;
  34       res[i].a = s + x;
  35       res[i].d = u + t;
  36       s = ptr->h - ptr->a;
  37       x = ptr->d - ptr->c;
  38       res[i].b = s + x;
  39       res[i].f = ptr->f + ptr->h;
  40       res[i].e = ptr->b + ptr->e;
  41       res[i].h = ptr->d - ptr->g;
  42       res[i].g = u + t;
  43       ptr++;
  44     }
  45
  46   /* check results:  */
  47 #pragma GCC novector
  48   for (i = 0; i < N; i++)
  49     {
  50       if (res[i].c != arr[i].b - arr[i].a + arr[i].d - arr[i].c
  51           || res[i].a != arr[i].a + arr[i].g + arr[i].b + arr[i].d
  52           || res[i].d != arr[i].b - arr[i].a + arr[i].d - arr[i].c
  53           || res[i].b != arr[i].h - arr[i].a + arr[i].d - arr[i].c
  54           || res[i].f != arr[i].f + arr[i].h
  55           || res[i].e != arr[i].b + arr[i].e
  56           || res[i].h != arr[i].d - arr[i].g
  57           || res[i].g != arr[i].b - arr[i].a + arr[i].d - arr[i].c
  58        )
  59           abort();
  60    }
  61 }
  62
  63 int main (void)
  64 {
  65   int i;
  66   s arr[N];
  67
  68   check_vect ();
  69
  70   for (i = 0; i < N; i++)
  71     {
  72       arr[i].a = i;
  73       arr[i].b = i * 2;
  74       arr[i].c = 17;
  75       arr[i].d = i+34;
  76       arr[i].e = i;
  77       arr[i].f = i + 5;
  78       arr[i].g = i + 3;
  79       arr[i].h = 67;
  80       asm volatile ("" ::: "memory");
  81     }
  82
  83   main1 (arr);
  84
  85   return 0;
  86 }
  87
  88 /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" { target vect_strided8 } } } */
  89