[gcc(refs/users/rguenth/heads/vect-force-slp)] Amend --param vect-force-slp checking

[Richard Biener]

https://gcc.gnu.org/g:c917156dc46220d47d491a348a2a813baf908065

commit c917156dc46220d47d491a348a2a813baf908065
Author: Richard Biener <rguenther@suse.de>
Date:   Fri Feb 23 12:39:57 2024 +0100

    Amend --param vect-force-slp checking
    
    This makes sure no non-SLP code-gen happens.
    
            * tree-vect-stmts.cc (vect_transform_stmt): Assert no
            non-SLP code-gen happens with --param vect-force-slp=1.

Diff:
---
 gcc/tree-vect-stmts.cc | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/gcc/tree-vect-stmts.cc b/gcc/tree-vect-stmts.cc
index 576db3196a79..ba3871a819fc 100644
--- a/gcc/tree-vect-stmts.cc
+++ b/gcc/tree-vect-stmts.cc
@@ -13336,6 +13336,8 @@ vect_transform_stmt (vec_info *vinfo,
 
   gcc_assert (slp_node || !PURE_SLP_STMT (stmt_info));
 
+  gcc_assert (!param_vect_force_slp || slp_node);
+
   tree saved_vectype = STMT_VINFO_VECTYPE (stmt_info);
   if (slp_node)
     STMT_VINFO_VECTYPE (stmt_info) = SLP_TREE_VECTYPE (slp_node);