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 volatile int y = 0;
  19
  20 __attribute__ ((noinline)) int
  21 main1 (s *arr, ii *iarr)
  22 {
  23   s *ptr = arr;
  24   ii *iptr = iarr;
  25   s res[N];
  26   ii ires[N];
  27   int i;
  28
  29   for (i = 0; i < N; i++)
  30     {
  31       ires[i].a = iptr->b - iptr->a;
  32       ires[i].b = iptr->b + iptr->a;
  33       res[i].b = ptr->b - ptr->a;
  34       res[i].a = ptr->b + ptr->a;
  35       iptr++;
  36       ptr++;
  37     }
  38
  39   /* check results:  */
  40   for (i = 0; i < N; i++)
  41     {
  42       if (res[i].b != arr[i].b - arr[i].a
  43           || ires[i].a != iarr[i].b - iarr[i].a
  44           || res[i].a != arr[i].b + arr[i].a
  45           || ires[i].b != iarr[i].b +  iarr[i].a
  46 )
  47         abort ();
  48     }
  49
  50   return 0;
  51 }
  52
  53 int main (void)
  54 {
  55   int i;
  56   s arr[N];
  57   ii iarr[N];
  58
  59   check_vect ();
  60
  61   for (i = 0; i < N; i++)
  62     {
  63       arr[i].a = i;
  64       arr[i].b = i * 2;
  65       iarr[i].a = i;
  66       iarr[i].b = i * 3;
  67       if (y) /* Avoid vectorization.  */
  68         abort ();
  69     }
  70
  71   main1 (arr, iarr);
  72
  73   return 0;
  74 }
  75
  76 /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect"  { target vect_strided2 } } } */
  77 /* { dg-final { cleanup-tree-dump "vect" } } */
  78