[Bug target/92841] Optimize -fstack-protector-strong code generation a bit

[bp at alien8 dot de]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92841

--- Comment #7 from Boris <bp at alien8 dot de> ---
Created attachment 47465
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=47465&action=edit
Micha's patterns fix

Fix for mix-up between patterns with and without multi-nodes.