old-autovect-branch/gcc/testsuite/gcc.dg/vect/vect-79.c

   1 /* { dg-require-effective-target vect_float } */
   2
   3 #include <stdarg.h>
   4 #include "tree-vect.h"
   5
   6 #define N 16
   7
   8 float fa[N] __attribute__ ((__aligned__(16)));
   9 float fb[N+4] __attribute__ ((__aligned__(16))) = {0.0, 1.0, 2.0, 3.0, 4.0, 5.0, 7.0, 9.0, 10.0, 11.0, 12.0, 13.0, 14.0, 15.0, 16.0, 17.0, 18.0, 19.0};
  10 float fc[N] __attribute__ ((__aligned__(16))) = {0.5, 1.5, 2.5, 3.5, 4.5, 5.5, 7.5, 9.5, 10.5, 11.5, 12.5, 13.5, 14.5, 15.5};
  11
  12 /* Like vect-80.c but the pointers are not annotated as restricted,
  13    and therefore can't be antialiased.  */
  14
  15 int
  16 main1 (float *pa, float *pb, float *pc)
  17 {
  18   int i;
  19   float *q = pb + 4;
  20
  21   for (i = 0; i < N; i++)
  22     {
  23       pa[i] = q[i] * pc[i];
  24     }
  25
  26   for (i = 0; i < N; i++)
  27     {
  28       if (pa[i] != q[i] * pc[i])
  29         abort();
  30     }
  31
  32   return 0;
  33 }
  34
  35
  36 int main (void)
  37 {
  38   check_vect ();
  39
  40   main1 (fa, fb, fc);
  41
  42   return 0;
  43 }
  44
  45 /* Currently the loops fail to vectorize due to aliasing problems.
  46   If/when the aliasing problems are resolved, unalignment may
  47   prevent vectorization on some targets.  */
  48 /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect"  { xfail *-*-* } } } */
  49 /* { dg-final { scan-tree-dump-times "can't determine dependence between" 1 "vect" } } */
  50 /* { dg-final { cleanup-tree-dump "vect" } } */
  51