ref: 8aaecfe55f73a8c599fed1adbbba11a5e94dfc3c
parent: 47165e1c2ccc0471349691cc92f64f81984b18c5
author: Sigrid Solveig Haflínudóttir <sigrid@ftrv.se>
date: Tue May 9 10:24:23 EDT 2023
7l: throw an error if CASE uses the same register for base and offset (CASE R1, R1)