gcc/testsuite/gcc.dg/vect/vect-48.c

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