[gcc r16-2470] Remove non-SLP path from vectorizable_bswap

[Richard Biener via Gcc-cvs]

https://gcc.gnu.org/g:a9394c914739becd6239c8aaa277c9b8e32a4e5e

commit r16-2470-ga9394c914739becd6239c8aaa277c9b8e32a4e5e
Author: Richard Biener <rguent...@suse.de>
Date:   Thu Jul 24 11:34:45 2025 +0200

    Remove non-SLP path from vectorizable_bswap
    
            * tree-vect-stmts.cc (vectorizable_bswap): Remove non-SLP path.

Diff:
---
 gcc/tree-vect-stmts.cc | 31 +++++--------------------------
 1 file changed, 5 insertions(+), 26 deletions(-)

diff --git a/gcc/tree-vect-stmts.cc b/gcc/tree-vect-stmts.cc
index 2e9b3d2e6863..bf1fcdc0940e 100644
--- a/gcc/tree-vect-stmts.cc
+++ b/gcc/tree-vect-stmts.cc
@@ -3242,23 +3242,11 @@ vectorizable_bswap (vec_info *vinfo,
 {
   tree op, vectype;
   gcall *stmt = as_a <gcall *> (stmt_info->stmt);
-  loop_vec_info loop_vinfo = dyn_cast <loop_vec_info> (vinfo);
-  unsigned ncopies;
 
   op = gimple_call_arg (stmt, 0);
-  vectype = STMT_VINFO_VECTYPE (stmt_info);
+  vectype = SLP_TREE_VECTYPE (slp_node);
   poly_uint64 nunits = TYPE_VECTOR_SUBPARTS (vectype);
 
-  /* Multiple types in SLP are handled by creating the appropriate number of
-     vectorized stmts for each SLP node.  Hence, NCOPIES is always 1 in
-     case of SLP.  */
-  if (slp_node)
-    ncopies = 1;
-  else
-    ncopies = vect_get_num_copies (loop_vinfo, vectype);
-
-  gcc_assert (ncopies >= 1);
-
   if (TYPE_SIZE (vectype_in) != TYPE_SIZE (vectype))
     {
       if (dump_enabled_p ())
@@ -3290,8 +3278,7 @@ vectorizable_bswap (vec_info *vinfo,
 
   if (! vec_stmt)
     {
-      if (slp_node
-         && !vect_maybe_update_slp_op_vectype (slp_op[0], vectype_in))
+      if (!vect_maybe_update_slp_op_vectype (slp_op[0], vectype_in))
        {
          if (dump_enabled_p ())
            dump_printf_loc (MSG_MISSED_OPTIMIZATION, vect_location,
@@ -3304,8 +3291,7 @@ vectorizable_bswap (vec_info *vinfo,
       record_stmt_cost (cost_vec,
                        1, vector_stmt, stmt_info, 0, vect_prologue);
       record_stmt_cost (cost_vec,
-                       slp_node
-                       ? SLP_TREE_NUMBER_OF_VEC_STMTS (slp_node) : ncopies,
+                       SLP_TREE_NUMBER_OF_VEC_STMTS (slp_node),
                        vec_perm, stmt_info, 0, vect_body);
       return true;
     }
@@ -3314,8 +3300,7 @@ vectorizable_bswap (vec_info *vinfo,
 
   /* Transform.  */
   vec<tree> vec_oprnds = vNULL;
-  vect_get_vec_defs (vinfo, stmt_info, slp_node, ncopies,
-                    op, &vec_oprnds);
+  vect_get_vec_defs (vinfo, stmt_info, slp_node, 1, op, &vec_oprnds);
   /* Arguments are ready. create the new vector stmt.  */
   unsigned i;
   tree vop;
@@ -3334,15 +3319,9 @@ vectorizable_bswap (vec_info *vinfo,
       new_stmt = gimple_build_assign (tem, build1 (VIEW_CONVERT_EXPR,
                                                   vectype, tem2));
       vect_finish_stmt_generation (vinfo, stmt_info, new_stmt, gsi);
-      if (slp_node)
-       slp_node->push_vec_def (new_stmt);
-      else
-       STMT_VINFO_VEC_STMTS (stmt_info).safe_push (new_stmt);
+      slp_node->push_vec_def (new_stmt);
     }
 
-  if (!slp_node)
-    *vec_stmt = STMT_VINFO_VEC_STMTS (stmt_info)[0];
-
   vec_oprnds.release ();
   return true;
 }