gcc/testsuite/gcc.dg/vect/vect-strided-a-u32-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 int a;
  10    unsigned int b;
  11 } ii;
  12
  13 __attribute__ ((noinline)) int
  14 main1 ()
  15 {
  16   unsigned short arr[N];
  17   unsigned short *ptr = arr;
  18   ii iarr[N];
  19   ii *iptr = iarr;
  20   unsigned short res[N];
  21   ii ires[N];
  22   int i;
  23
  24   for (i = 0; i < N; i++)
  25     {
  26       arr[i] = i;
  27       iarr[i].a = i;
  28       iarr[i].b = i * 3;
  29       __asm__ volatile ("");
  30     }
  31
  32   for (i = 0; i < N; i++)
  33     {
  34       ires[i].a = iptr->b - iptr->a;
  35       ires[i].b = iptr->b + iptr->a;
  36       res[i] = *ptr;
  37       iptr++;
  38       ptr++;
  39     }
  40
  41   /* check results:  */
  42 #pragma GCC novector
  43   for (i = 0; i < N; i++)
  44     {
  45       if (res[i] != arr[i]
  46           || ires[i].a != iarr[i].b - iarr[i].a
  47           || ires[i].b != iarr[i].b +  iarr[i].a)
  48         abort ();
  49     }
  50
  51   return 0;
  52 }
  53
  54 int main (void)
  55 {
  56   int i;
  57
  58   check_vect ();
  59
  60   main1 ();
  61
  62   return 0;
  63 }
  64
  65 /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect"  { target vect_strided2 } } } */
  66