gcc/testsuite/gcc.dg/vect/vect-nest-cycle-2.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 out[N];
   9 float check_res[N] = {880,864,848,832,816,800,784,768,752,736,720,704,688,672,656,640};
  10 float a[2*N] = {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31};
  11
  12 /* Outer-loop vectorization.  */
  13
  14 __attribute__ ((noinline)) void
  15 foo ()
  16 {
  17   int i, j;
  18   float res;
  19
  20   for (i = 0; i < N; i++)
  21     {
  22       res = 1000;
  23
  24       for (j = 0; j < N; j++)
  25         res = res - a[i+j];
  26
  27       out[i] = res;
  28     }
  29
  30   for (i = 0; i < N; i++)
  31     if (out[i] != check_res[i])
  32       abort ();
  33
  34 }
  35
  36 int main ()
  37 {
  38   check_vect ();
  39
  40   foo();
  41
  42   return 0;
  43 }
  44
  45 /* { dg-final { scan-tree-dump-times "OUTER LOOP VECTORIZED" 1 "vect" { xfail vect_no_align } } } */
  46 /* { dg-final { cleanup-tree-dump "vect" } } */
  47