gcc/testsuite/gcc.dg/vect/vect-strided-mult.c

   1 /* { dg-require-effective-target vect_int } */
   2
   3 #include <stdarg.h>
   4 #include "tree-vect.h"
   5
   6 #define N 128
   7
   8 typedef struct {
   9    unsigned short a;
  10    unsigned short b;
  11 } s;
  12
  13 typedef struct {
  14    unsigned int a;
  15    unsigned int b;
  16 } ii;
  17
  18 __attribute__ ((noinline)) int
  19 main1 (s *arr, ii *iarr)
  20 {
  21   s *ptr = arr;
  22   ii *iptr = iarr;
  23   s res[N];
  24   ii ires[N];
  25   int i;
  26
  27   for (i = 0; i < N; i++)
  28     {
  29       ires[i].a = iptr->b - iptr->a;
  30       ires[i].b = iptr->b + iptr->a;
  31       res[i].b = ptr->b - ptr->a;
  32       res[i].a = ptr->b + ptr->a;
  33       iptr++;
  34       ptr++;
  35     }
  36
  37   /* check results:  */
  38 #pragma GCC novector
  39   for (i = 0; i < N; i++)
  40     {
  41       if (res[i].b != arr[i].b - arr[i].a
  42           || ires[i].a != iarr[i].b - iarr[i].a
  43           || res[i].a != arr[i].b + arr[i].a
  44           || ires[i].b != iarr[i].b +  iarr[i].a
  45 )
  46         abort ();
  47     }
  48
  49   return 0;
  50 }
  51
  52 int main (void)
  53 {
  54   int i;
  55   s arr[N];
  56   ii iarr[N];
  57
  58   check_vect ();
  59
  60   for (i = 0; i < N; i++)
  61     {
  62       arr[i].a = i;
  63       arr[i].b = i * 2;
  64       iarr[i].a = i;
  65       iarr[i].b = i * 3;
  66       asm volatile ("" ::: "memory");
  67     }
  68
  69   main1 (arr, iarr);
  70
  71   return 0;
  72 }
  73
  74 /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect"  { target vect_strided2 } } } */
  75