[llvm] [ConstraintElim] Decompose `sub nsw` (PR #118219)

[LLVM Continuous Integration via llvm-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `lldb-remote-linux-ubuntu` running on `as-builder-9` while building `llvm` at step 16 "test-check-lldb-api".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/195/builds/2425

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

```
Step 16 (test-check-lldb-api) failure: Test just built components: check-lldb-api completed (failure)
...
PASS: lldb-api :: types/TestIntegerType.py (1207 of 1216)
PASS: lldb-api :: types/TestIntegerTypeExpr.py (1208 of 1216)
PASS: lldb-api :: types/TestRecursiveTypes.py (1209 of 1216)
PASS: lldb-api :: types/TestShortType.py (1210 of 1216)
PASS: lldb-api :: types/TestShortTypeExpr.py (1211 of 1216)
PASS: lldb-api :: types/TestLongTypes.py (1212 of 1216)
PASS: lldb-api :: types/TestLongTypesExpr.py (1213 of 1216)
PASS: lldb-api :: tools/lldb-server/TestNonStop.py (1214 of 1216)
PASS: lldb-api :: tools/lldb-server/TestLldbGdbServer.py (1215 of 1216)
UNRESOLVED: lldb-api :: tools/lldb-server/TestGdbRemoteLaunch.py (1216 of 1216)
******************** TEST 'lldb-api :: tools/lldb-server/TestGdbRemoteLaunch.py' FAILED ********************
Script:
--
/usr/bin/python3.12 /home/buildbot/worker/as-builder-9/lldb-remote-linux-ubuntu/llvm-project/lldb/test/API/dotest.py -u CXXFLAGS -u CFLAGS --env LLVM_LIBS_DIR=/home/buildbot/worker/as-builder-9/lldb-remote-linux-ubuntu/build/./lib --env LLVM_INCLUDE_DIR=/home/buildbot/worker/as-builder-9/lldb-remote-linux-ubuntu/build/include --env LLVM_TOOLS_DIR=/home/buildbot/worker/as-builder-9/lldb-remote-linux-ubuntu/build/./bin --libcxx-include-dir /home/buildbot/worker/as-builder-9/lldb-remote-linux-ubuntu/build/include/c++/v1 --libcxx-include-target-dir /home/buildbot/worker/as-builder-9/lldb-remote-linux-ubuntu/build/include/aarch64-unknown-linux-gnu/c++/v1 --libcxx-library-dir /home/buildbot/worker/as-builder-9/lldb-remote-linux-ubuntu/build/./lib/aarch64-unknown-linux-gnu --arch aarch64 --build-dir /home/buildbot/worker/as-builder-9/lldb-remote-linux-ubuntu/build/lldb-test-build.noindex --lldb-module-cache-dir /home/buildbot/worker/as-builder-9/lldb-remote-linux-ubuntu/build/lldb-test-build.noindex/module-cache-lldb/lldb-api --clang-module-cache-dir /home/buildbot/worker/as-builder-9/lldb-remote-linux-ubuntu/build/lldb-test-build.noindex/module-cache-clang/lldb-api --executable /home/buildbot/worker/as-builder-9/lldb-remote-linux-ubuntu/build/./bin/lldb --compiler /home/buildbot/worker/as-builder-9/lldb-remote-linux-ubuntu/build/bin/clang --dsymutil /home/buildbot/worker/as-builder-9/lldb-remote-linux-ubuntu/build/./bin/dsymutil --make /usr/bin/make --llvm-tools-dir /home/buildbot/worker/as-builder-9/lldb-remote-linux-ubuntu/build/./bin --lldb-obj-root /home/buildbot/worker/as-builder-9/lldb-remote-linux-ubuntu/build/tools/lldb --lldb-libs-dir /home/buildbot/worker/as-builder-9/lldb-remote-linux-ubuntu/build/./lib --platform-url connect://jetson-agx-2198.lab.llvm.org:1234 --platform-working-dir /home/ubuntu/lldb-tests --sysroot /mnt/fs/jetson-agx-ubuntu --env ARCH_CFLAGS=-mcpu=cortex-a78 --platform-name remote-linux /home/buildbot/worker/as-builder-9/lldb-remote-linux-ubuntu/llvm-project/lldb/test/API/tools/lldb-server -p TestGdbRemoteLaunch.py
--
Exit Code: 1

Command Output (stdout):
--
lldb version 20.0.0git (https://github.com/llvm/llvm-project.git revision 003fb2aeb49dc7440cab7e009bd264f8f42fc8dc)
  clang revision 003fb2aeb49dc7440cab7e009bd264f8f42fc8dc
  llvm revision 003fb2aeb49dc7440cab7e009bd264f8f42fc8dc
Setting up remote platform 'remote-linux'
Connecting to remote platform 'remote-linux' at 'connect://jetson-agx-2198.lab.llvm.org:1234'...
Connected.
Setting remote platform working directory to '/home/ubuntu/lldb-tests'...
Skipping the following test categories: ['dsym', 'gmodules', 'debugserver', 'objc', 'lldb-dap']
connect to debug monitor on port 16514 failed, attempt #1 of 10
connect to debug monitor on port 14855 failed, attempt #2 of 10
connect to debug monitor on port 14681 failed, attempt #3 of 10
connect to debug monitor on port 12499 failed, attempt #4 of 10
connect to debug monitor on port 15330 failed, attempt #5 of 10
connect to debug monitor on port 15228 failed, attempt #6 of 10
connect to debug monitor on port 15584 failed, attempt #7 of 10
connect to debug monitor on port 16318 failed, attempt #8 of 10
connect to debug monitor on port 19210 failed, attempt #9 of 10
connect to debug monitor on port 12639 failed, attempt #10 of 10

--
Command Output (stderr):
--
WARNING:root:Custom libc++ is not supported for remote runs: ignoring --libcxx arguments
PASS: LLDB (/home/buildbot/worker/as-builder-9/lldb-remote-linux-ubuntu/build/bin/clang-aarch64) :: test_QEnvironmentHexEncoded_llgs (TestGdbRemoteLaunch.GdbRemoteLaunchTestCase.test_QEnvironmentHexEncoded_llgs)
PASS: LLDB (/home/buildbot/worker/as-builder-9/lldb-remote-linux-ubuntu/build/bin/clang-aarch64) :: test_QEnvironment_llgs (TestGdbRemoteLaunch.GdbRemoteLaunchTestCase.test_QEnvironment_llgs)
UNSUPPORTED: LLDB (/home/buildbot/worker/as-builder-9/lldb-remote-linux-ubuntu/build/bin/clang-aarch64) :: test_launch_failure_via_vRun_llgs (TestGdbRemoteLaunch.GdbRemoteLaunchTestCase.test_launch_failure_via_vRun_llgs) (skip on remote platform) 
PASS: LLDB (/home/buildbot/worker/as-builder-9/lldb-remote-linux-ubuntu/build/bin/clang-aarch64) :: test_launch_via_A_llgs (TestGdbRemoteLaunch.GdbRemoteLaunchTestCase.test_launch_via_A_llgs)
FAIL: LLDB (/home/buildbot/worker/as-builder-9/lldb-remote-linux-ubuntu/build/bin/clang-aarch64) :: test_launch_via_vRun_llgs (TestGdbRemoteLaunch.GdbRemoteLaunchTestCase.test_launch_via_vRun_llgs)
PASS: LLDB (/home/buildbot/worker/as-builder-9/lldb-remote-linux-ubuntu/build/bin/clang-aarch64) :: test_launch_via_vRun_no_args_llgs (TestGdbRemoteLaunch.GdbRemoteLaunchTestCase.test_launch_via_vRun_no_args_llgs)
======================================================================

```

</details>

https://github.com/llvm/llvm-project/pull/118219