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From: "crazylht at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/98309] [AVX512] Missing expander for ldexpm3.
Date: Wed, 11 Aug 2021 02:22:08 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D98309

--- Comment #2 from Hongtao.liu <crazylht at gmail dot com> ---
Although avx512 have vscalefps/d, vectorizer failed at=20
```
      /* 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.=