We are running a survey to help us improve the experience for all of our members. If you see the survey appear, please take the time to tell us about your experience if you can.
My colleague Ronan already provided the right link to download the different compiler versions/revisions. It's a bit hard to find the right revision of the compiler. This knowledgebase article shows all available revisions:
https://developer.arm.com/documentation/ka005198/latest
So the revision you are looking for is: r5p6-07rel1