gcc/testsuite/gcc.dg/vect/vect-peel-3.c

   1 /* { dg-require-effective-target vect_int } */
   2
   3 #include <stdarg.h>
   4 #include <stdio.h>
   5 #include "tree-vect.h"
   6
   7 #define N 128
   8 #define RES 21888
   9
  10 /* unaligned store.  */
  11
  12 int ib[N+10];
  13 int ia[N+10];
  14 int ic[N+10];
  15
  16 __attribute__ ((noinline))
  17 int main1 ()
  18 {
  19   int i, suma = 0, sumb = 0, sumc = 0;
  20
  21   /* ib and ic have same misalignment, we peel to align them.  */
  22   for (i = 1; i <= N; i++)
  23     {
  24       suma += ia[i];
  25       sumb += ib[i+6];
  26       sumc += ic[i+2];
  27     }
  28
  29   /* check results:  */
  30   if (suma + sumb + sumc != RES)
  31     abort ();
  32
  33   return 0;
  34 }
  35
  36 int main (void)
  37 {
  38   int i;
  39
  40   check_vect ();
  41
  42   for (i = 0; i < N+10; i++)
  43     {
  44       ib[i] = i;
  45       ic[i] = i+2;
  46       ia[i] = i/2;
  47     }
  48
  49   return main1 ();
  50 }
  51
  52 /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 2 "vect" } } */
  53 /* { dg-final { scan-tree-dump-times "Vectorizing an unaligned access" 1 "vect"  { xfail vect_no_align } } } */
  54 /* { dg-final { scan-tree-dump-times "Alignment of access forced using peeling" 1 "vect" } } */
  55 /* { dg-final { cleanup-tree-dump "vect" } } */