[Bug tree-optimization/114164] simdclone vectorization creates unsupported IL

["rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114164

--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
The following fixes this, it also shows that even with -mavx2 we don't support
this (as was expected after the analysis).  Note since we emit
mask ? {true,..} : {false,...} we only support in-branch clones when the
target has corresponding vcond_mask expanders.  For vcondeq we'd need to
emit a redundant mask != mask_false_cst compare

diff --git a/gcc/tree-vect-stmts.cc b/gcc/tree-vect-stmts.cc
index be0e1a9c69d..14a3ffb5f02 100644
--- a/gcc/tree-vect-stmts.cc
+++ b/gcc/tree-vect-stmts.cc
@@ -4210,6 +4210,16 @@ vectorizable_simd_clone_call (vec_info *vinfo,
stmt_vec_info stmt_info,
                                     " supported for mismatched vector
sizes.\n");
                  return false;
                }
+             if (!expand_vec_cond_expr_p (clone_arg_vectype,
+                                          arginfo[i].vectype, ERROR_MARK))
+               {
+                 if (dump_enabled_p ())
+                   dump_printf_loc (MSG_MISSED_OPTIMIZATION,
+                                    vect_location,
+                                    "cannot compute mask argument for"
+                                    " in-branch vector clones.\n");
+                 return false;
+               }
            }
          else if (SCALAR_INT_MODE_P (bestn->simdclone->mask_mode))
            {