[Bug tree-optimization/101932] New: Vectorizer failed due to argument types differ for ldexp

[crazylht at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101932

            Bug ID: 101932
           Summary: Vectorizer failed due to argument types differ for
                    ldexp
           Product: gcc
           Version: 12.0
            Status: UNCONFIRMED
          Keywords: missed-optimization
          Severity: normal
          Priority: P3
         Component: tree-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: crazylht at gmail dot com
  Target Milestone: ---
              Host: x86_64-pc-linux-gnu
            Target: x86_64-*-* i?86-*-*

This is from PR98309

--- 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.