gcc/testsuite/gcc.dg/vect/vect-91.c

   1 /* { dg-do compile } */
   2 /* { dg-require-effective-target vect_int } */
   3
   4 #include <stdarg.h>
   5 #include "tree-vect.h"
   6
   7 #define N 256
   8
   9 extern int a[N];
  10
  11 /* The alignment of 'pa' is unknown.
  12    Yet we do know that both the read access and write access have
  13    the same alignment. Peeling to align one of the accesses will
  14    align the other.  */
  15
  16 int
  17 main1 (int * pa)
  18 {
  19   int i;
  20
  21   for (i = 0; i < N; i++)
  22     {
  23       pa[i] = pa[i] + 1;
  24     }
  25
  26   return 0;
  27 }
  28
  29 /* The alignment of 'a' is unknown.
  30    Yet we do know that both the read access and write access have
  31    the same alignment. Peeling to align one of the accesses will
  32    align the other.  */
  33
  34 int
  35 main2 ()
  36 {
  37   int i;
  38
  39   for (i = 0; i < N; i++)
  40     {
  41       a[i] = a[i] + 1;
  42     }
  43
  44   return 0;
  45 }
  46
  47 int
  48 main3 ()
  49 {
  50   int i;
  51
  52   for (i = 0; i < N; i++)
  53     {
  54       a[i] = a[i+20];
  55     }
  56
  57   return 0;
  58 }
  59
  60 /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 3 "vect" { xfail vect_no_int_add } } } */
  61 /* { dg-final { scan-tree-dump-times "Vectorizing an unaligned access" 0 "vect" } } */
  62 /* { dg-final { scan-tree-dump-times "accesses have the same alignment." 3 "vect" } } */
  63 /* { dg-final { scan-tree-dump-times "Alignment of access forced using peeling" 3 "vect" } } */
  64 /* { dg-final { cleanup-tree-dump "vect" } } */