gcc/testsuite/gcc.dg/vect/slp-35.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    int a;
  10    int b;
  11    int c;
  12    int d;
  13    int e;
  14 } s;
  15
  16 int
  17 main1 (s *arr)
  18 {
  19   int i;
  20   s *ptr = arr;
  21   s res[N];
  22
  23   /* SLP with unrolling by 4.  */
  24   for (i = 0; i < N; i++)
  25     {
  26       res[i].c = ptr->c + ptr->c;
  27       res[i].a = ptr->a + ptr->a;
  28       res[i].d = ptr->d + ptr->d;
  29       res[i].b = ptr->b + ptr->b;
  30       res[i].e = ptr->e + ptr->e;
  31       ptr++;
  32     }
  33
  34   /* check results:  */
  35   for (i = 0; i < N; i++)
  36     {
  37       if (res[i].c != arr[i].c + arr[i].c
  38           || res[i].a != arr[i].a + arr[i].a
  39           || res[i].d != arr[i].d + arr[i].d
  40           || res[i].b != arr[i].b + arr[i].b
  41           || res[i].e != arr[i].e + arr[i].e)
  42          abort();
  43     }
  44
  45 }
  46
  47 int main (void)
  48 {
  49   int i;
  50   s arr[N];
  51
  52   check_vect ();
  53
  54   for (i = 0; i < N; i++)
  55     {
  56       arr[i].a = i;
  57       arr[i].b = i * 2;
  58       arr[i].c = 17;
  59       arr[i].d = i+34;
  60       arr[i].e = i * 3 + 5;
  61       asm volatile ("" ::: "memory");
  62     }
  63
  64   main1 (arr);
  65
  66   return 0;
  67 }
  68
  69 /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" } } */
  70 /* { dg-final { scan-tree-dump-times "vectorizing stmts using SLP" 1 "vect" } } */
  71