gcc/testsuite/gcc.dg/vect/fast-math-vect-reduc-8.c

   1 /* { dg-do compile } */
   2 /* { dg-require-effective-target vect_float } */
   3
   4 #include "tree-vect.h"
   5
   6 extern float x[128] __attribute__ ((__aligned__(__BIGGEST_ALIGNMENT__)));
   7 extern float y[128] __attribute__ ((__aligned__(__BIGGEST_ALIGNMENT__)));
   8 extern float z[128] __attribute__ ((__aligned__(__BIGGEST_ALIGNMENT__)));
   9
  10 float f (unsigned n)
  11 {
  12   float ret = 0.0;
  13   unsigned i;
  14   for (i = 0; i < n; i++)
  15     {
  16       float diff = x[i] - y[i];
  17       ret -= diff * diff * z[i];
  18     }
  19   return ret;
  20 }
  21
  22 /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" } } */