gnu/dist/gcc4/gcc/testsuite/gcc.dg/vect/vect-44.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 accesses, with unknown alignment.
  23    The loop bound is known and divisible by the vectorization factor.
  24    No aliasing problems.
  25    vect-50.c is similar to this one with one difference:
  26         the loop bound is unknown.
  27    vect-45.c is similar to this one with one difference:
  28         can't prove that pointers don't alias.  */
  29
  30 int
  31 main1 (float * __restrict__ pa, float * __restrict__ pb, float * __restrict__ pc)
  32 {
  33   int i;
  34
  35   for (i = 0; i < N; i++)
  36     {
  37       pa[i] = pb[i] * pc[i];
  38     }
  39
  40   bar (pa,pb,pc);
  41
  42   return 0;
  43 }
  44
  45 int main (void)
  46 {
  47   int i;
  48   float a[N+4] __attribute__ ((__aligned__(16)));
  49   float b[N+4] __attribute__ ((__aligned__(16))) = {0,3,6,9,12,15,18,21,24,27,30,33,36,39,42,45,48,51,54,57,60,63,66,69};
  50   float c[N+4] __attribute__ ((__aligned__(16))) = {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23};
  51
  52   check_vect ();
  53
  54   main1 (a,b,c);
  55   main1 (&a[1],b,c);
  56   main1 (a,&b[1],c);
  57   main1 (&a[1],&b[1],&c[1]);
  58
  59   return 0;
  60 }
  61
  62 /* For targets that don't support misaligned loads we version for the
  63    all three accesses (peeling to align the store will not force the
  64    two loads to be aligned).  */
  65
  66 /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" } } */
  67 /* { dg-final { scan-tree-dump-times "Vectorizing an unaligned access" 2 "vect" { xfail vect_no_align } } } */
  68 /* { dg-final { scan-tree-dump-times "Alignment of access forced using peeling" 1 "vect" { xfail vect_no_align } } } */
  69 /* { dg-final { scan-tree-dump-times "Alignment of access forced using versioning." 3 "vect" { target vect_no_align } } } */
  70 /* { dg-final { cleanup-tree-dump "vect" } } */