old-autovect-branch/gcc/testsuite/gcc.dg/vect/vect-76.c

   1 /* { dg-require-effective-target vect_int } */
   2
   3 #include <stdarg.h>
   4 #include "tree-vect.h"
   5
   6 #define N 8
   7 #define OFF 4
   8
   9 /* Check handling of accesses for which the "initial condition" -
  10    the expression that represents the first location accessed - is
  11    more involved than just an ssa_name.  */
  12
  13 int ib[N+OFF] __attribute__ ((__aligned__(16))) = {0, 1, 3, 5, 7, 11, 13, 17, 0, 2, 6, 10};
  14
  15 int main1 (int *pib)
  16 {
  17   int i;
  18   int ia[N+OFF];
  19   int ic[N+OFF] = {0, 1, 3, 5, 7, 11, 13, 17, 0, 2, 6, 10};
  20
  21   for (i = OFF; i < N; i++)
  22     {
  23       ia[i] = pib[i - OFF];
  24     }
  25
  26
  27   /* check results:  */
  28   for (i = OFF; i < N; i++)
  29     {
  30      if (ia[i] != pib[i - OFF])
  31         abort ();
  32     }
  33
  34   /* Not vectorizable: pib may alias ia.  */
  35   for (i = 0; i < N; i++)
  36     {
  37       ia[i] = pib[i - OFF];
  38     }
  39
  40
  41   /* check results:  */
  42   for (i = 0; i < N; i++)
  43     {
  44      if (ia[i] != pib[i - OFF])
  45         abort ();
  46     }
  47
  48   for (i = OFF; i < N; i++)
  49     {
  50       ia[i] = ic[i - OFF];
  51     }
  52
  53
  54   /* check results:  */
  55   for (i = OFF; i < N; i++)
  56     {
  57      if (ia[i] != ic[i - OFF])
  58         abort ();
  59     }
  60
  61   return 0;
  62 }
  63
  64 int main (void)
  65 {
  66   check_vect ();
  67
  68   main1 (&ib[OFF]);
  69   return 0;
  70 }
  71
  72
  73 /* { dg-final { scan-tree-dump-times "vectorized 3 loops" 1 "vect" } } */
  74 /* { dg-final { scan-tree-dump-times "Vectorizing an unaligned access" 2 "vect" { xfail vect_no_align } } } */
  75 /* { dg-final { cleanup-tree-dump "vect" } } */
  76
  77