RISC-V LLVM sync-up call 25th June 2020

For background on these calls, see

Reminder: the purpose is to co-ordinate between active contributors.
If you have support questions etc then it's best to post to llvm-dev.

We have a call every alternate Thursday at 4pm BST, via

I've created a shared calendar which may help in keeping track, which
is accessible at:
* <https://calendar.google.com/calendar/b/1?cid=bG93cmlzYy5vcmdfMG41cGtlc2ZqY25wMGJoNWhwczFwMGJkODBAZ3JvdXAuY2FsZW5kYXIuZ29vZ2xlLmNvbQ&gt;
* <https://calendar.google.com/calendar/ical/lowrisc.org_0n5pkesfjcnp0bh5hps1p0bd80%40group.calendar.google.com/public/basic.ics&gt;

Issues to discuss today include the following:

* LLVM 10.0.1
  * Final issues being ironed out, all fixes are in, but one patch has been updated to avoid breaking ABI.
  * Tracking issue: 46378 – RISCV backport request for 10.0.1
* LLVM 11 Plans
* B-extension Work Update
* V-extension Work Update
* Shadow Stack Discussion
* Thanks to Evandro for working on clarifications and improvements to psABI and ASM manual.
* Reminder: we now meet every other week. We'll meet again on Thu 9 July.
* No other topics were submitted, as always, please do submit things
you'd like to discuss