Changes

[lldb/Plugin] Fix some issues on Windows

 - Don't initialize NativePDB.
 - Initialize ProcessWindows after any Process*Core plugins.
 - Don't initialize DynamicLoaderDarwinKernel on non-Darwin platforms.

[lldb/Plugin] Unconditionally build Darwin-Kernel

[X86] Add one use check to '0-x == y --> x+y == 0' in EmitCmp.

I failed to copy it when I moved this in
b62de210cf50ccb6822260e4075dd93333adb23e

[XCore][NFC] Remove trailing space

[NFC] Remove trailing space

sed -Ei 's/[[:space:]]+$//' include/**/*.{def,h,td} lib/**/*.{cpp,h,td}

Revert "[lldb/CMake] Auto-generate the Initialize and Terminate calls for plugin"

This is still failing spectacularly on the Windows bot and I still have
no clue what's going on.

[lldb/Plugins] Rename lldbPluginDisassemblerLLVM (NFC)

[lldb/Plugins] Remove PLUGIN from libraries that aren't really plugins.

Although their name and location suggests otherwise, these libraries are
not really plugins but rather support the real plugins.

[X86] Use isScalarFPTypeInSSEReg to simplify code in LowerSELECT. NFC

[lldb/Plugins] Initialize all ABI plugins by their plugin name

[lldb/Plugins] Rename initializers to match their plugin name.

Use LLDB_PLUGIN_DEFINE_ADV to make the name of the generated initializer
match the name of the plugin. This is a step towards generating the
initializers with a def file. I'm landing this change in pieces so I can
narrow down what exactly breaks the Windows bot.

[Coroutines][2/6] New pass manager: coro-split

Summary:
This patch has four dependencies:

1. The first in this series of patches that implement coroutine passes in the
   new pass manager: https://reviews.llvm.org/D71898.
2. A patch that introduces an API for CGSCC passes to add new reference
   edges to a `LazyCallGraph`, `updateCGAndAnalysisManagerForCGSCCPass`:
   https://reviews.llvm.org/D72025.
3. A patch that introduces a `CallGraphUpdater` helper class that is
   capable of mutating internal `LazyCallGraph` state in order to insert
   new function nodes into a specific SCC: https://reviews.llvm.org/D70927.
4. And finally, a small edge case fix for updating `LazyCallGraph` that
   patch 3 above happens to run into: https://reviews.llvm.org/D72226.

This is the second in a series of patches that ports the LLVM coroutines
passes to the new pass manager infrastructure. This patch implements
'coro-split'.

Some notes:
* Using the new CGSCC pass manager resulted in IR being printed in the
  reverse order in some tests. To prevent FileCheck checks from failing due
  to these reversed orders, this patch splits up test files that test
  multiple different coroutine functions: specifically
  coro-alloc-with-param.ll, coro-split-eh.ll, and coro-eh-aware-edge-split.ll.
* CoroSplit.cpp contained 2 overloads of `splitCoroutine`, one of which
  dispatched to the other based on the coroutine ABI being used (C++20
  switch-based versus Swift returned-continuation-based). I found this
  confusing, especially with the additional branching based on `CallGraph`
  vs. `LazyCallGraph`, so I removed the ABI-checking overload of
  `splitCoroutine`.

Reviewers: GorNishanov, lewissbaker, chandlerc, jdoerfert, junparser, deadalnix, wenlei

Reviewed By: wenlei

Subscribers: wenlei, qcolombet, EricWF, hiraditya, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D71899

[Coroutines][3/6] New pass manager: coro-elide

Summary:
Depends on https://reviews.llvm.org/D71899.

The third in a series of patches that ports the LLVM coroutines passes
to the new pass manager infrastructure. This patch implements 'coro-elide'.

The new pass manager infrastructure does not implicitly repeat CGSCC
pass pipelines when a function is devirtualized, and so the tests
for the new pass manager that rely on that behavior now explicitly
specify `repeat<2>`.

Reviewers: GorNishanov, lewissbaker, chandlerc, jdoerfert, junparser, deadalnix, wenlei

Reviewed By: wenlei

Subscribers: wenlei, EricWF, Prazek, hiraditya, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D71900

Revert new pass manager coro-split and coro-elide

This reverts
https://reviews.llvm.org/rG7125d66f9969605d886b5286780101a45b5bed67 and
https://reviews.llvm.org/rG00fec8004aca6588d8d695a2c3827c3754c380a0 due
to buildbot failures:
http://lab.llvm.org:8011/builders/clang-cmake-x86_64-sde-avx512-linux/builds/34004

Revert "[lldb/lldb-server] Add target.xml support for qXfer request."

This patch cause floating point registers to fail on LLDB aarch64-linux
buildbot.

http://lab.llvm.org:8011/builders/lldb-aarch64-ubuntu/builds/1713

This reverts commit aedc196101e33bd58f7443c5b93398418ce55edf.

[lldb/Plugins] Conditionally build OperatingSystemPython.

Only build the Python Operating System Plugin when LLDB_ENABLE_PYTHON is
set to true.

[lldb/Plugins] Add missing initialize/terminate calls

Add missing initialize and terminate calls for DynamicLoaderHexagonDYLD
and ObjectFileJIT.

Revert new files from new pass manager coro-split/coro-elide

This reverts
https://reviews.llvm.org/rG7125d66f9969605d886b5286780101a45b5bed67 and
https://reviews.llvm.org/rG00fec8004aca6588d8d695a2c3827c3754c380a0 due
to buildbot failures:
http://lab.llvm.org:8011/builders/clang-cmake-x86_64-sde-avx512-linux/builds/34004

Previous revert 11053a1cc61afaabf2df2b8345d8d392c88cd508 missed newly
added files, this commit removes those as well.