[Bug target/80334] [7 Regression] Segfault when taking address of copy of unaligned struct

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80334

--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fix:

Index: gcc/tree-ssa-loop-ivopts.c
===================================================================
--- gcc/tree-ssa-loop-ivopts.c  (revision 246724)
+++ gcc/tree-ssa-loop-ivopts.c  (working copy)
@@ -7396,7 +7396,11 @@ rewrite_use_address (struct ivopts_data
     base_hint = var_at_stmt (data->current_loop, cand, use->stmt);

   iv = var_at_stmt (data->current_loop, cand, use->stmt);
-  ref = create_mem_ref (&bsi, TREE_TYPE (*use->op_p), &aff,
+  tree type = TREE_TYPE (*use->op_p);
+  unsigned int align = get_object_alignment (*use->op_p);
+  if (align != TYPE_ALIGN (type))
+    type = build_aligned_type (type, align);
+  ref = create_mem_ref (&bsi, type, &aff,
                        reference_alias_ptr_type (*use->op_p),
                        iv, base_hint, data->speed);
   copy_ref_info (ref, *use->op_p);