MFC r255978:

Pull in r191711 from upstream llvm trunk:

  The X86FixupLEAs pass for Intel Atom must not call
  convertToThreeAddress on ADD16rr opcodes, if src1 != src, since that
  would cause convertToThreeAddress to try to create a virtual register.
  This is not permitted after register allocation, which is when the
  X86FixupLEAs pass runs.

  This patch fixes PR16785.

Pull in r191715 from upstream llvm trunk:

  Forgot to add a break statement.

This should enable building the x11-toolskits/libXaw port with
CPUTYPE=atom.

Reported by:	Kenta Suzumoto <kentas@hush.com>
MFC r255798:
Pre-acquire the filedesc sx when a possibility exists that the later
code could need to remove a kqueue from the filedesc list.
MFC r255945:
Make the mac_policy_rm lock recursable, which allows reentrance into
the mac framework.
MFC r255940:
Add LK_TRYUPGRADE operation for lockmgr(9).
MFC r255941:
Increase the chance of the buffer write from the bufdaemon helper
context to succeed. If the locked vnode which owns the buffer to be
written is shared locked, try the non-blocking upgrade of the lock to
exclusive.
MFC r255942:
For vunref(), try to upgrade the vnode lock if the function was called
with the vnode shared-locked.
MFC r256024:

Pull in r186338 from upstream llvm trunk:

  Remove invalid assert in DAGTypeLegalizer::RemapValue

  There is a comment at the top of DAGTypeLegalizer::PerformExpensiveChecks
  which, in part, says:

   // Note that these invariants may not hold momentarily when processing a node:
   // the node being processed may be put in a map before being marked Processed.

  Unfortunately, this assert would be valid only if the above-mentioned invariant
  held unconditionally. This was causing llc to assert when, in fact,
  everything was fine.

  Thanks to Richard Sandiford for investigating this issue!

  Fixes PR16562.

This fixes assertions which could occur in the multimedia/ffmpeg1 and
multimedia/ffmpeg2 ports.

Reported by:	Matthias Apitz <guru@unixarea.de>
MFH (r255597): add unbound user to facilitate cross-building
MFH (r256097): add missing entries to ftpusers and reorder
MFC r237560,254319 (by uqs): Fix 'make depend'.

PR:		misc/180918
Submitted by:	Eugene Grosbein <egrosbein@rdtc.ru>