gcc/testsuite/gcc.dg/vect/vect-52.c

   1 /* { dg-require-effective-target vect_float } */
   2 /* { dg-add-options double_vectors } */
   3
   4 #include <stdarg.h>
   5 #include "tree-vect.h"
   6
   7 #define N 256
   8
   9 /* Unaligned pointer read accesses, aligned write access.
  10    The loop bound is unknown.
  11    No aliasing problems.
  12    vect-60.c is similar to this one with one difference:
  13         the alignment of the read accesses is known.
  14    vect-48.c is similar to this one with one difference:
  15         the loop bound is known.
  16    vect-53.c is similar to this one with one difference:
  17         aliasing is a problem.  */
  18
  19 __attribute__ ((noinline)) int
  20 main1 (int n, float *pb, float *pc)
  21 {
  22   float pa[N] __attribute__ ((__aligned__(__BIGGEST_ALIGNMENT__)));
  23   int i;
  24
  25   for (i = 0; i < n; i++)
  26     {
  27       pa[i] = pb[i] * pc[i];
  28     }
  29
  30   /* check results:  */
  31   for (i = 0; i < N; i++)
  32     {
  33       if (pa[i] != (pb[i] * pc[i]))
  34         abort ();
  35     }
  36
  37   return 0;
  38 }
  39
  40 int main (void)
  41 {
  42   int i;
  43   float a[N] __attribute__ ((__aligned__(__BIGGEST_ALIGNMENT__)));
  44   float b[N+1] __attribute__ ((__aligned__(__BIGGEST_ALIGNMENT__))) = {0,3,6,9,12,15,18,21,24,27,30,33,36,39,42,45,48,51,54,57,60};
  45   float c[N+1] __attribute__ ((__aligned__(__BIGGEST_ALIGNMENT__))) = {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20};
  46
  47   check_vect ();
  48
  49   main1 (N,&b[1],c);
  50   main1 (N,&b[1],&c[1]);
  51
  52   return 0;
  53 }
  54
  55 /* For targets that don't support misaligned loads we version for the two loads.
  56    (The store is aligned).  */
  57
  58 /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" } } */
  59 /* { dg-final { scan-tree-dump-times "Vectorizing an unaligned access" 3 "vect" { target { ! vect_align_stack_vars } xfail { ! vect_unaligned_possible } } } } */
  60 /* { dg-final { scan-tree-dump-times "Vectorizing an unaligned access" 2 "vect" { target vect_align_stack_vars xfail { ! vect_unaligned_possible } } } } */
  61 /* { dg-final { scan-tree-dump-times "Alignment of access forced using peeling" 0 "vect" } } */
  62 /* { dg-final { scan-tree-dump-times "Alignment of access forced using versioning." 2 "vect" { target { vect_no_align && { ! vect_hw_misalign } } } } } */