gcc/testsuite/gcc.dg/vect/pr99412.c

   1 /* { dg-do compile } */
   2 /* { dg-additional-options "-Ofast --param vect-epilogues-nomask=0" } */
   3 /* { dg-require-effective-target vect_float } */
   4
   5 /* From TSVC s352.  */
   6
   7 typedef float real_t;
   8
   9 #define LEN_1D 32000
  10 #define LEN_2D 256
  11
  12 real_t a[LEN_1D],b[LEN_1D];
  13 real_t foo ()
  14 {
  15   real_t dot = (real_t)0.;
  16   for (int i = 0; i < LEN_1D; i += 5) {
  17       dot = dot + a[i] * b[i] + a[i + 1] * b[i + 1] + a[i + 2]
  18           * b[i + 2] + a[i + 3] * b[i + 3] + a[i + 4] * b[i + 4];
  19   }
  20
  21   return dot;
  22 }
  23
  24 /* { dg-final { scan-tree-dump "LOOP VECTORIZED" "vect" } } */