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