Vendor import of llvm-project branch release/11.x
llvmorg-11-init-20933-g3c1fca803bc.

Vendor import of llvm-project master 2e10b7a39b9, the last commit before
the llvmorg-12-init tag, from which release/11.x was branched.

Vendor import of llvm-project master e26a78e70, the last commit before
the llvmorg-11-init tag, from which release/10.x was branched.

Remove files from vendor/llvm-project/master which are unused, and never
merged to contrib.

Eliminate differences between Git version of llvm-project master, and
our vendor import in ^/vendor/llvm-project/master.

Remove empty dirs under vendor/llvm-project, which are no longer stored
in git.

Copy llvm vendor/*/dist to vendor/llvm-project/master

This uses the new layout of the upstream repository, which was recently
migrated to GitHub, and converted into a "monorepo".  That is, most of
the earlier separate sub-projects with their own branches and tags were
consolidated into one top-level directory, and are now branched and
tagged together.

Vendor import of stripped LLVM openmp trunk r375505, the last commit
before the upstream Subversion repository was made read-only, and the
LLVM project migrated to GitHub:

https://llvm.org/svn/llvm-project/openmp/trunk@375505

Vendor import of stripped lldb trunk r375505, the last commit before the
upstream Subversion repository was made read-only, and the LLVM project
migrated to GitHub:

https://llvm.org/svn/llvm-project/lldb/trunk@375505

Vendor import of stripped lld trunk r375505, the last commit before the
upstream Subversion repository was made read-only, and the LLVM project
migrated to GitHub:

https://llvm.org/svn/llvm-project/lld/trunk@375505

Vendor import of stripped LLVM libunwind trunk r375505, the last commit
before the upstream Subversion repository was made read-only, and the
LLVM project migrated to GitHub:

https://llvm.org/svn/llvm-project/libunwind/trunk@375505

Vendor import of stripped libc++ trunk r375505, the last commit before
the upstream Subversion repository was made read-only, and the LLVM
project migrated to GitHub:

https://llvm.org/svn/llvm-project/libcxx/trunk@375505

Vendor import of stripped compiler-rt trunk r375505, the last commit
before the upstream Subversion repository was made read-only, and the
LLVM project migrated to GitHub:

https://llvm.org/svn/llvm-project/compiler-rt/trunk@375505

Vendor import of stripped clang trunk r375505, the last commit before
the upstream Subversion repository was made read-only, and the LLVM
project migrated to GitHub:

https://llvm.org/svn/llvm-project/cfe/trunk@375505

Vendor import of stripped llvm trunk r375505, the last commit before the
upstream Subversion repository was made read-only, and the LLVM project
migrated to GitHub:

https://llvm.org/svn/llvm-project/llvm/trunk@375505

Import missed sources for lldb-specific TableGen tool.

Vendor import of stripped LLVM openmp trunk r366426 (just before the
release_90 branch point):

https://llvm.org/svn/llvm-project/openmp/trunk@366426

Vendor import of stripped lldb trunk r366426 (just before the release_90
branch point):

https://llvm.org/svn/llvm-project/lldb/trunk@366426

Vendor import of stripped lld trunk r366426 (just before the release_90
branch point):

https://llvm.org/svn/llvm-project/lld/trunk@366426

Vendor import of stripped LLVM libunwind trunk r366426 (just before the
release_90 branch point):

https://llvm.org/svn/llvm-project/libunwind/trunk@366426

Vendor import of stripped libc++ trunk r366426 (just before the release_90 branch
point):

https://llvm.org/svn/llvm-project/libcxx/trunk@366426

Vendor import of stripped compiler-rt trunk r366426 (just before the release_90
branch point):

https://llvm.org/svn/llvm-project/compiler-rt/trunk@366426

Vendor import of stripped clang trunk r366426 (just before the
release_90 branch point):

https://llvm.org/svn/llvm-project/cfe/trunk@366426

Vendor import of stripped llvm trunk r366426 (just before the release_90
branch point):

https://llvm.org/svn/llvm-project/llvm/trunk@366426

Remove upstream files and directories from vendor/lldb/dist that we do
not use.  This saves on repository space, and reduces the number of tree
conflicts when merging.

Remove upstream files and directories from vendor/lld/dist that we do
not use.  This saves on repository space, and reduces the number of tree
conflicts when merging.

Remove upstream files and directories from vendor/libc++/dist that we do
not use.  This saves on repository space, and reduces the number of tree
conflicts when merging.

Remove upstream files and directories from vendor/compiler-rt/dist that
we do not use.  This saves on repository space, and reduces the number
of tree conflicts when merging.

Remove upstream files and directories from vendor/clang/dist that we do
not use.  This saves on repository space, and reduces the number of tree
conflicts when merging.

Remove upstream files and directories from vendor/llvm/dist that we do
not use.  This saves on repository space, and reduces the number of tree
conflicts when merging.

Vendor import of LLVM openmp trunk r351319 (just before the release_80
branch point):
https://llvm.org/svn/llvm-project/openmp/trunk@351319

Vendor import of LLVM libunwind trunk r351319 (just before the
release_80 branch point):
https://llvm.org/svn/llvm-project/libunwind/trunk@351319

Vendor import of lldb trunk r351319 (just before the release_80 branch
point):
https://llvm.org/svn/llvm-project/lldb/trunk@351319

Vendor import of lld trunk r351319 (just before the release_80 branch
point):
https://llvm.org/svn/llvm-project/lld/trunk@351319

Vendor import of libc++ trunk r351319 (just before the release_80
branch point):
https://llvm.org/svn/llvm-project/libcxx/trunk@351319

Vendor import of compiler-rt trunk r351319 (just before the release_80
branch point):
https://llvm.org/svn/llvm-project/compiler-rt/trunk@351319

Vendor import of clang trunk r351319 (just before the release_80 branch
point):
https://llvm.org/svn/llvm-project/cfe/trunk@351319

Vendor import of llvm trunk r351319 (just before the release_80 branch
point):
https://llvm.org/svn/llvm-project/llvm/trunk@351319

Vendor import of lldb trunk r338536:
https://llvm.org/svn/llvm-project/lldb/trunk@338536

Vendor import of lld trunk r338536:
https://llvm.org/svn/llvm-project/lld/trunk@338536

Vendor import of libc++ trunk r338536:
https://llvm.org/svn/llvm-project/libcxx/trunk@338536

Vendor import of compiler-rt trunk r338536:
https://llvm.org/svn/llvm-project/compiler-rt/trunk@338536

Vendor import of clang trunk r338536:
https://llvm.org/svn/llvm-project/cfe/trunk@338536

Vendor import of llvm trunk r338536:
https://llvm.org/svn/llvm-project/llvm/trunk@338536

Vendor import of lldb trunk r338150:
https://llvm.org/svn/llvm-project/lldb/trunk@338150

Vendor import of lld trunk r338150:
https://llvm.org/svn/llvm-project/lld/trunk@338150

Vendor import of libc++ trunk r338150:
https://llvm.org/svn/llvm-project/libcxx/trunk@338150

Vendor import of compiler-rt trunk r338150:
https://llvm.org/svn/llvm-project/compiler-rt/trunk@338150

Vendor import of clang trunk r338150:
https://llvm.org/svn/llvm-project/cfe/trunk@338150

Vendor import of llvm trunk r338150:
https://llvm.org/svn/llvm-project/llvm/trunk@338150

Vendor import of compiler-rt trunk r321545:
https://llvm.org/svn/llvm-project/compiler-rt/trunk@321545

Vendor import of llvm trunk r321545:
https://llvm.org/svn/llvm-project/llvm/trunk@321545

Vendor import of lldb trunk r321530:
https://llvm.org/svn/llvm-project/lldb/trunk@321530

Vendor import of lld trunk r321530:
https://llvm.org/svn/llvm-project/lld/trunk@321530

Vendor import of libc++ trunk r321530:
https://llvm.org/svn/llvm-project/libcxx/trunk@321530

Vendor import of compiler-rt trunk r321530:
https://llvm.org/svn/llvm-project/compiler-rt/trunk@321530

Vendor import of clang trunk r321530:
https://llvm.org/svn/llvm-project/cfe/trunk@321530

Vendor import of llvm trunk r321530:
https://llvm.org/svn/llvm-project/llvm/trunk@321530

Vendor import of lld trunk r321426:
https://llvm.org/svn/llvm-project/lld/trunk@321426

Vendor import of clang trunk r321426:
https://llvm.org/svn/llvm-project/cfe/trunk@321426

Vendor import of llvm trunk r321426:
https://llvm.org/svn/llvm-project/llvm/trunk@321426

Vendor import of lldb trunk r321414:
https://llvm.org/svn/llvm-project/lldb/trunk@321414

Vendor import of lld trunk r321414:
https://llvm.org/svn/llvm-project/lld/trunk@321414

Vendor import of libc++ trunk r321414:
https://llvm.org/svn/llvm-project/libcxx/trunk@321414

Vendor import of compiler-rt trunk r321414:
https://llvm.org/svn/llvm-project/compiler-rt/trunk@321414

Vendor import of clang trunk r321414:
https://llvm.org/svn/llvm-project/cfe/trunk@321414

Vendor import of llvm trunk r321414:
https://llvm.org/svn/llvm-project/llvm/trunk@321414

Vendor import of lldb trunk r321017:
https://llvm.org/svn/llvm-project/lldb/trunk@321017

Vendor import of lld trunk r321017:
https://llvm.org/svn/llvm-project/lld/trunk@321017

Vendor import of libc++ trunk r321017:
https://llvm.org/svn/llvm-project/libcxx/trunk@321017

Vendor import of compiler-rt trunk r321017:
https://llvm.org/svn/llvm-project/compiler-rt/trunk@321017

Vendor import of clang trunk r321017:
https://llvm.org/svn/llvm-project/cfe/trunk@321017

Vendor import of llvm trunk r321017:
https://llvm.org/svn/llvm-project/llvm/trunk@321017

Vendor import of lld 5.0.1 release r320880:
https://llvm.org/svn/llvm-project/lld/tags/RELEASE_501/final@320880

Vendor import of clang 5.0.1 release r320880:
https://llvm.org/svn/llvm-project/cfe/tags/RELEASE_501/final@320880

Vendor import of llvm 5.0.1 release r320880:
https://llvm.org/svn/llvm-project/llvm/tags/RELEASE_501/final@320880

Vendor import of lldb release_50 branch r319231:
https://llvm.org/svn/llvm-project/lldb/branches/release_50@319231

Vendor import of lld release_50 branch r319231:
https://llvm.org/svn/llvm-project/lld/branches/release_50@319231

Vendor import of libc++ release_50 branch r319231:
https://llvm.org/svn/llvm-project/libcxx/branches/release_50@319231

Vendor import of clang release_50 branch r319231:
https://llvm.org/svn/llvm-project/cfe/branches/release_50@319231

Vendor import of llvm release_50 branch r319231:
https://llvm.org/svn/llvm-project/llvm/branches/release_50@319231

Vendor import of clang 5.0.0 release r312559:
https://llvm.org/svn/llvm-project/cfe/tags/RELEASE_500/final@312559

Vendor import of llvm 5.0.0 release r312559:
https://llvm.org/svn/llvm-project/llvm/tags/RELEASE_500/final@312559

Vendor import of lldb release_50 branch r312293:
https://llvm.org/svn/llvm-project/lldb/branches/release_50@312293

Vendor import of lld release_50 branch r312293:
https://llvm.org/svn/llvm-project/lld/branches/release_50@312293

Vendor import of libc++ release_50 branch r312293:
https://llvm.org/svn/llvm-project/libcxx/branches/release_50@312293

Vendor import of compiler-rt release_50 branch r312293:
https://llvm.org/svn/llvm-project/compiler-rt/branches/release_50@312293

Vendor import of clang release_50 branch r312293:
https://llvm.org/svn/llvm-project/cfe/branches/release_50@312293

Vendor import of llvm release_50 branch r312293:
https://llvm.org/svn/llvm-project/llvm/branches/release_50@312293

Vendor import of lldb release_50 branch r311606:
https://llvm.org/svn/llvm-project/lldb/branches/release_50@311606

Vendor import of compiler-rt release_50 branch r311606:
https://llvm.org/svn/llvm-project/compiler-rt/branches/release_50@311606

Vendor import of clang release_50 branch r311606:
https://llvm.org/svn/llvm-project/cfe/branches/release_50@311606

Vendor import of llvm release_50 branch r311606:
https://llvm.org/svn/llvm-project/llvm/branches/release_50@311606

Vendor import of lld release_50 branch r311219:
https://llvm.org/svn/llvm-project/lld/branches/release_50@311219

Vendor import of libc++ release_50 branch r311219:
https://llvm.org/svn/llvm-project/libcxx/branches/release_50@311219

Vendor import of clang release_50 branch r311219:
https://llvm.org/svn/llvm-project/cfe/branches/release_50@311219

Vendor import of llvm release_50 branch r311219:
https://llvm.org/svn/llvm-project/llvm/branches/release_50@311219

Vendor import of libc++ release_50 branch r310316:
https://llvm.org/svn/llvm-project/libcxx/branches/release_50@310316

Vendor import of clang release_50 branch r310316:
https://llvm.org/svn/llvm-project/cfe/branches/release_50@310316

Vendor import of llvm release_50 branch r310316:
https://llvm.org/svn/llvm-project/llvm/branches/release_50@310316