https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98309
--- Comment #2 from Hongtao.liu <crazylht at gmail dot com> ---
Although avx512 have vscalefps/d, vectorizer failed at
```
/* We can only handle calls with arguments of the same type. */
if (rhs_type
&& !types_compatible_p (rhs_type, TREE_TYPE (op)))
{
if (dump_enabled_p ())
dump_printf_loc (MSG_MISSED_OPTIMIZATION, vect_location,
"argument types differ.\n");
return false;
}
```
since __builtin_ldexp is defined as BT_FN_DOUBLE_DOUBLE_INT with 2 different
type arguments.
