[llvm] [RISCV] Add basic ISel patterns for Xqcilo instructions (PR #135901)

[LLVM Continuous Integration via llvm-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `lldb-x86_64-debian` running on `lldb-x86_64-debian` while building `llvm` at step 6 "test".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/162/builds/20310

<details>
<summary>Here is the relevant piece of the build log for the reference</summary>

```
Step 6 (test) failure: build (failure)
...
PASS: lldb-api :: functionalities/thread/num_threads/TestNumThreads.py (115 of 2827)
PASS: lldb-api :: lang/cpp/virtual-functions/TestCppVirtualFunctions.py (116 of 2827)
PASS: lldb-api :: functionalities/step-avoids-no-debug/TestStepNoDebug.py (117 of 2827)
PASS: lldb-api :: functionalities/thread/exit_during_break/TestExitDuringBreak.py (118 of 2827)
PASS: lldb-api :: functionalities/data-formatter/data-formatter-stl/generic/unordered/TestDataFormatterGenericUnordered.py (119 of 2827)
PASS: lldb-shell :: Commands/command-thread-siginfo.test (120 of 2827)
PASS: lldb-api :: functionalities/data-formatter/data-formatter-stl/generic/bitset/TestDataFormatterGenericBitset.py (121 of 2827)
PASS: lldb-api :: tools/lldb-server/libraries-svr4/TestGdbRemoteLibrariesSvr4Support.py (122 of 2827)
PASS: lldb-api :: functionalities/postmortem/mach-core/TestMachCore.py (123 of 2827)
UNRESOLVED: lldb-api :: tools/lldb-dap/memory/TestDAP_memory.py (124 of 2827)
******************** TEST 'lldb-api :: tools/lldb-dap/memory/TestDAP_memory.py' FAILED ********************
Script:
--
/usr/bin/python3 /home/worker/2.0.1/lldb-x86_64-debian/llvm-project/lldb/test/API/dotest.py -u CXXFLAGS -u CFLAGS --env LLVM_LIBS_DIR=/home/worker/2.0.1/lldb-x86_64-debian/build/./lib --env LLVM_INCLUDE_DIR=/home/worker/2.0.1/lldb-x86_64-debian/build/include --env LLVM_TOOLS_DIR=/home/worker/2.0.1/lldb-x86_64-debian/build/./bin --arch x86_64 --build-dir /home/worker/2.0.1/lldb-x86_64-debian/build/lldb-test-build.noindex --lldb-module-cache-dir /home/worker/2.0.1/lldb-x86_64-debian/build/lldb-test-build.noindex/module-cache-lldb/lldb-api --clang-module-cache-dir /home/worker/2.0.1/lldb-x86_64-debian/build/lldb-test-build.noindex/module-cache-clang/lldb-api --executable /home/worker/2.0.1/lldb-x86_64-debian/build/./bin/lldb --compiler /home/worker/2.0.1/lldb-x86_64-debian/build/./bin/clang --dsymutil /home/worker/2.0.1/lldb-x86_64-debian/build/./bin/dsymutil --make /usr/bin/gmake --llvm-tools-dir /home/worker/2.0.1/lldb-x86_64-debian/build/./bin --lldb-obj-root /home/worker/2.0.1/lldb-x86_64-debian/build/tools/lldb --lldb-libs-dir /home/worker/2.0.1/lldb-x86_64-debian/build/./lib -t /home/worker/2.0.1/lldb-x86_64-debian/llvm-project/lldb/test/API/tools/lldb-dap/memory -p TestDAP_memory.py
--
Exit Code: 1

Command Output (stdout):
--
lldb version 21.0.0git (https://github.com/llvm/llvm-project.git revision 40460a5cf76c973a783fb2f5229e1076398df96e)
  clang revision 40460a5cf76c973a783fb2f5229e1076398df96e
  llvm revision 40460a5cf76c973a783fb2f5229e1076398df96e
Skipping the following test categories: ['libc++', 'dsym', 'gmodules', 'debugserver', 'objc']

--
Command Output (stderr):
--
Change dir to: /home/worker/2.0.1/lldb-x86_64-debian/llvm-project/lldb/test/API/tools/lldb-dap/memory
runCmd: settings clear -all

output: 

runCmd: settings set symbols.enable-external-lookup false

output: 

runCmd: settings set target.inherit-tcc true

output: 

runCmd: settings set target.disable-aslr false

output: 

runCmd: settings set target.detach-on-error false

output: 

runCmd: settings set target.auto-apply-fixits false

```

</details>

https://github.com/llvm/llvm-project/pull/135901