gcc/testsuite/gcc.dg/vect/vect-nest-cycle-1.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 in[N] = {232,132,32,432,532,321,327,323,321,324,322,329,432,832,932,232};
   9 float out[N];
  10 float check_res[N] = {112,-4,-120,264,348,121,111,91,73,60,42,33,120,504,588,-128};
  11 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};
  12
  13 /* Outer-loop vectorization.  */
  14
  15 __attribute__ ((noinline)) void
  16 foo ()
  17 {
  18   int i, j;
  19   float res;
  20
  21   for (i = 0; i < N; i++)
  22     {
  23       res = in[i];
  24
  25       for (j = 0; j < N; j++)
  26         res = res - a[i+j];
  27
  28       out[i] = res;
  29     }
  30
  31   for (i = 0; i < N; i++)
  32     if (out[i] != check_res[i])
  33       abort ();
  34
  35 }
  36
  37 int main ()
  38 {
  39   check_vect ();
  40
  41   foo();
  42
  43   return 0;
  44 }
  45
  46 /* { dg-final { scan-tree-dump-times "OUTER LOOP VECTORIZED" 1 "vect" { xfail { vect_no_align && { ! vect_hw_misalign } } } } } */
  47