gcc/testsuite/gcc.dg/vect/vect-strided-u8-i8-gap4.c

   1 /* { dg-require-effective-target vect_int } */
   2
   3 #include <stdarg.h>
   4 #include "tree-vect.h"
   5
   6 #define N 24
   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 volatile int y = 0;
  20
  21 __attribute__ ((noinline)) int
  22 main1 (s *arr)
  23 {
  24   int i;
  25   s *ptr = arr;
  26   s res[N];
  27   unsigned char x;
  28
  29   for (i = 0; i < N; i++)
  30     {
  31       res[i].c = ptr->b + ptr->c;
  32       x = ptr->c + ptr->f;
  33       res[i].a = x + ptr->b;
  34       res[i].d = ptr->b + ptr->c;
  35       res[i].b = ptr->c;
  36       res[i].f = ptr->f + ptr->e;
  37       res[i].e = ptr->b + ptr->e;
  38       res[i].h = ptr->c;
  39       res[i].g = ptr->b + ptr->c;
  40       ptr++;
  41     }
  42
  43   /* check results:  */
  44   for (i = 0; i < N; i++)
  45     {
  46       if (res[i].c != arr[i].b + arr[i].c
  47           || res[i].a != arr[i].c + arr[i].f + arr[i].b
  48           || res[i].d != arr[i].b + arr[i].c
  49           || res[i].b != arr[i].c
  50           || res[i].f != arr[i].f + arr[i].e
  51           || res[i].e != arr[i].b + arr[i].e
  52           || res[i].h != arr[i].c
  53           || res[i].g != arr[i].b + arr[i].c)
  54           abort ();
  55    }
  56
  57   ptr = arr;
  58   /* Not vectorizable: gap in store. */
  59   for (i = 0; i < N; i++)
  60     {
  61       res[i].a = ptr->b;
  62       res[i].b = ptr->c;
  63       ptr++;
  64     }
  65
  66   /* Check results.  */
  67   for (i = 0; i < N; i++)
  68     {
  69       if (res[i].a != arr[i].b
  70           || res[i].b != arr[i].c)
  71           abort ();
  72     }
  73
  74 }
  75
  76
  77 int main (void)
  78 {
  79   int i;
  80   s arr[N];
  81
  82   check_vect ();
  83
  84   for (i = 0; i < N; i++)
  85     {
  86       arr[i].a = i;
  87       arr[i].b = i * 2;
  88       arr[i].c = 17;
  89       arr[i].d = i+34;
  90       arr[i].e = i * 3 + 5;
  91       arr[i].f = i * 5;
  92       arr[i].g = i - 3;
  93       arr[i].h = 56;
  94       if (y) /* Avoid vectorization.  */
  95         abort ();
  96     }
  97
  98   main1 (arr);
  99
 100   return 0;
 101 }
 102
 103 /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" { target vect_strided8 } } } */
 104