gnu/dist/gcc4/gcc/testsuite/gcc.dg/vect/vect-58.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/2; i++)
  14     {
  15       if (pa[i+1] != (pb[i+1] * pc[i+1]))
  16         abort ();
  17     }
  18
  19   return;
  20 }
  21
  22 /* Unaligned pointer accesses, with a known alignment.
  23    The loop bound is unknown.
  24    No aliasing problems.
  25    vect-54.c is similar to this one with one difference:
  26         the loop bound is known.  */
  27
  28 int
  29 main1 (int n)
  30 {
  31   int i;
  32   float a[N] __attribute__ ((__aligned__(16)));  float b[N] __attribute__ ((__aligned__(16))) = {0,3,6,9,12,15,18,21,24,27,30,33,36,39,42,45,48,51,54,57};  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};
  33   float *pa = a;
  34   float *pb = b;
  35   float *pc = c;
  36
  37   for (i = 0; i < n/2; i++)
  38     {
  39       pa[i+1] = pb[i+1] * pc[i+1];
  40     }
  41
  42   bar (a,b,c);
  43
  44   return 0;
  45 }
  46
  47 int main (void)
  48 {
  49   int i;
  50   int n=N;
  51
  52   check_vect ();
  53   main1 (n);
  54
  55   return 0;
  56 }
  57
  58 /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" } } */
  59 /* { dg-final { scan-tree-dump-times "Vectorizing an unaligned access" 0 "vect" } } */
  60 /* { dg-final { scan-tree-dump-times "Alignment of access forced using peeling" 1 "vect" } } */
  61 /* { dg-final { cleanup-tree-dump "vect" } } */