[gcc(refs/users/rguenth/heads/vect-force-slp)] Avoid ICEing with SLP scatter

[Richard Biener <rguenth@gcc.gnu.org>]

https://gcc.gnu.org/g:4ce8bd68e45be33d0598f3c117bcd2d41bd69635

commit 4ce8bd68e45be33d0598f3c117bcd2d41bd69635
Author: Richard Biener <rguenther@suse.de>
Date:   Fri Sep 29 13:39:07 2023 +0200

    Avoid ICEing with SLP scatter
    
    When we SLP discover scatters vectorizable_store will ICE instead
    of rejecting it.  See PR111133 for the missing support.
    
            * tree-vect-stmts.cc (vectorizable_store): Reject SLP or
            grouped scatters.

Diff:
---
 gcc/tree-vect-stmts.cc | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/gcc/tree-vect-stmts.cc b/gcc/tree-vect-stmts.cc
index 2a73e914bdf4..509e76b9f7b2 100644
--- a/gcc/tree-vect-stmts.cc
+++ b/gcc/tree-vect-stmts.cc
@@ -8344,6 +8344,15 @@ vectorizable_store (vec_info *vinfo,
 	return false;
     }
 
+  /* PR111133.  */
+  if (memory_access_type == VMAT_GATHER_SCATTER && (slp || grouped_store))
+    {
+      if (dump_enabled_p ())
+	dump_printf_loc (MSG_MISSED_OPTIMIZATION, vect_location,
+			 "unsupported grouped or SLP scatter.\n");
+      return false;
+    }
+
   bool costing_p = !vec_stmt;
   if (costing_p) /* transformation not required.  */
     {