RISC-V LLVM sync-up call 9 Apr 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 each 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>
  * <https://calendar.google.com/calendar/ical/lowrisc.org_0n5pkesfjcnp0bh5hps1p0bd80%40group.calendar.google.com/public/basic.ics>

Issues to discuss today include the following:
* Landing bitmanip patches
* Recent discussion on -mcpu https://reviews.llvm.org/D71124
* RVCHints change https://reviews.llvm.org/D77030
* Implementing evaluateBranch for better objdump output
* Linker relaxation support - anyone else looking into this? See
* FYI/reminders
  * Google benchmark fixes for RISC-V
  * Evandro is seeking compact code model feedback Reminder on code
model feedback https://github.com/riscv/riscv-elf-psabi-doc/issues/140
  * AUIPC/JALR range limitation discussion on isa-dev
  * vscale discussion on llvm-dev
http://lists.llvm.org/pipermail/llvm-dev/2020-April/140693.html - let
me know if you'd like to put it on a future agenda for a more in-depth
  * FDPIC discussions on RISC-V sw-dev are ongoing
* No other topics were submitted, as always, please do submit things
you'd like to discuss