[Bug target/70341] [5/6/7 Regression] cost model for addresses is incorrect, slsr is using reg + reg + CST for arm

[fredrik.hederstie...@securitas-direct.com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70341

--- Comment #7 from Fredrik Hederstierna 
<fredrik.hederstie...@securitas-direct.com> ---
Tested with GCC 6.2 and still same behaviour.