RISC-V LLVM sync-up call 9th July 2020

For background on these calls, see
<http://lists.llvm.org/pipermail/llvm-dev/2019-September/135087.html>.

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
<https://meet.google.com/ske-zcog-spp>.

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>
  * <https://calendar.google.com/calendar/ical/lowrisc.org_0n5pkesfjcnp0bh5hps1p0bd80%40group.calendar.google.com/public/basic.ics>

Issues to discuss today include the following:

* LLVM 11
  * Less than 1 week to branch (Wed 15th July)
  * Prioritising patches (please share any you think should be prioritised)
* -mcpu patch https://reviews.llvm.org/D71124 - I think we're all in
agreement this should land once comments + tests are cleaned up?
* Bitmanip and vector patch status
* Coordinating vector work (PLCT group
https://github.com/isrc-cas/rvv-llvm and other ongoing efforts)
* Heads up:
  * "[DAGCombiner] Prevent regression in isMulAddWithConstProfitable"
https://reviews.llvm.org/D83153 is beneficial for RISC-V
  * C++20 [[no_unique_address]] ABI issue
http://lists.llvm.org/pipermail/llvm-dev/2020-July/143129.html - patch
LGTM for RISC-V
* Next meeting: Thu 23 July
* No other topics were submitted, as always, please do submit things
you'd like to discuss

Best,

Alex