gnu/dist/gcc4/gcc/testsuite/gcc.dg/vect/vect-49.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 void bar (float *pa, float *pb, float *pc)
   9 {
  10   int i;
  11
  12   /* check results:  */
  13   for (i = 0; i < N; i++)
  14     {
  15       if (pa[i] != (pb[i] * pc[i]))
  16         abort ();
  17     }
  18
  19   return;
  20 }
  21
  22 /* Unaligned pointer read accesses, aligned pointer write access.
  23    The loop bound is known and divisible by the vectorization factor.
  24    Can't prove that the pointers don't alias.
  25    vect-53.c is similar to this one with one difference:
  26         the loop bound is unknown.
  27    vect-48.c is similar to this one with one difference:
  28         aliasing is not a problem.  */
  29
  30 int
  31 main1 (float *pb, float *pc)
  32 {
  33   float pa[N] __attribute__ ((__aligned__(16)));
  34   int i;
  35
  36   for (i = 0; i < N; i++)
  37     {
  38       pa[i] = pb[i] * pc[i];
  39     }
  40
  41   bar (pa,pb,pc);
  42
  43   return 0;
  44 }
  45
  46 int main (void)
  47 {
  48   int i;
  49   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};
  50   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};
  51
  52   check_vect ();
  53
  54   main1 (b,c);
  55   main1 (&b[1],c);
  56
  57   return 0;
  58 }
  59
  60 /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" { xfail *-*-* } } } */
  61 /* { dg-final { cleanup-tree-dump "vect" } } */