[gcc(refs/users/rguenth/heads/vect-force-slp)] Properly reject SLP gather with builtin decl

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

https://gcc.gnu.org/g:5fb7c61b94f9d83e31e26fa7f2f7f2279d2748ef

commit 5fb7c61b94f9d83e31e26fa7f2f7f2279d2748ef
Author: Richard Biener <rguenther@suse.de>
Date:   Fri Sep 29 14:34:33 2023 +0200

    Properly reject SLP gather with builtin decl
    
    The builtin decl path for gather load vectorization doesn't implement
    SLP (PR111131).  Check that instead of ICEing.
    
            * tree-vect-stmts.cc (vectorizable_load): Reject SLP gather
            with builtin decl vectorization.

Diff:
---
 gcc/tree-vect-stmts.cc | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/gcc/tree-vect-stmts.cc b/gcc/tree-vect-stmts.cc
index 4b0852dead1..a4a912474a1 100644
--- a/gcc/tree-vect-stmts.cc
+++ b/gcc/tree-vect-stmts.cc
@@ -9770,6 +9770,14 @@ vectorizable_load (vec_info *vinfo,
 	}
     }
 
+  if (memory_access_type == VMAT_GATHER_SCATTER && gs_info.decl && slp)
+    {
+      if (dump_enabled_p ())
+	dump_printf_loc (MSG_MISSED_OPTIMIZATION, vect_location,
+			 "unsupported SLP gather.\n");
+      return false;
+    }
+
   bool costing_p = !vec_stmt;
 
   if (costing_p) /* transformation not required.  */