[llvm] [GlobalISel] Add G_CONCAT_VECTOR handling in computeNumSignBits (PR #142355)

[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/23827

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

```
Step 6 (test) failure: build (failure)
...
UNSUPPORTED: lldb-shell :: ScriptInterpreter/Python/Crashlog/json.test (2983 of 2992)
UNSUPPORTED: lldb-shell :: Heap/heap-cstr.test (2984 of 2992)
UNSUPPORTED: lldb-shell :: ScriptInterpreter/Lua/breakpoint_oneline_callback.test (2985 of 2992)
UNSUPPORTED: lldb-shell :: ScriptInterpreter/Python/Crashlog/parser_text.test (2986 of 2992)
UNSUPPORTED: lldb-shell :: ScriptInterpreter/Lua/breakpoint_function_callback.test (2987 of 2992)
PASS: lldb-api :: api/multithreaded/TestMultithreaded.py (2988 of 2992)
PASS: lldb-api :: terminal/TestEditlineCompletions.py (2989 of 2992)
PASS: lldb-api :: commands/process/attach/TestProcessAttach.py (2990 of 2992)
PASS: lldb-api :: repl/clang/TestClangREPL.py (2991 of 2992)
TIMEOUT: lldb-shell :: Settings/TestCxxFrameFormatRecursive.test (2992 of 2992)
******************** TEST 'lldb-shell :: Settings/TestCxxFrameFormatRecursive.test' FAILED ********************
Exit Code: -9
Timeout: Reached timeout of 600 seconds

Command Output (stderr):
--
split-file /home/worker/2.0.1/lldb-x86_64-debian/llvm-project/lldb/test/Shell/Settings/TestCxxFrameFormatRecursive.test /home/worker/2.0.1/lldb-x86_64-debian/build/tools/lldb/test/Shell/Settings/Output/TestCxxFrameFormatRecursive.test.tmp # RUN: at line 6
+ split-file /home/worker/2.0.1/lldb-x86_64-debian/llvm-project/lldb/test/Shell/Settings/TestCxxFrameFormatRecursive.test /home/worker/2.0.1/lldb-x86_64-debian/build/tools/lldb/test/Shell/Settings/Output/TestCxxFrameFormatRecursive.test.tmp
/home/worker/2.0.1/lldb-x86_64-debian/build/bin/clang --target=specify-a-target-or-use-a-_host-substitution --target=x86_64-unknown-linux-gnu -pthread -fmodules-cache-path=/home/worker/2.0.1/lldb-x86_64-debian/build/lldb-test-build.noindex/module-cache-clang/lldb-shell -g -gdwarf /home/worker/2.0.1/lldb-x86_64-debian/build/tools/lldb/test/Shell/Settings/Output/TestCxxFrameFormatRecursive.test.tmp/main.cpp -o /home/worker/2.0.1/lldb-x86_64-debian/build/tools/lldb/test/Shell/Settings/Output/TestCxxFrameFormatRecursive.test.tmp.out # RUN: at line 7
+ /home/worker/2.0.1/lldb-x86_64-debian/build/bin/clang --target=specify-a-target-or-use-a-_host-substitution --target=x86_64-unknown-linux-gnu -pthread -fmodules-cache-path=/home/worker/2.0.1/lldb-x86_64-debian/build/lldb-test-build.noindex/module-cache-clang/lldb-shell -g -gdwarf /home/worker/2.0.1/lldb-x86_64-debian/build/tools/lldb/test/Shell/Settings/Output/TestCxxFrameFormatRecursive.test.tmp/main.cpp -o /home/worker/2.0.1/lldb-x86_64-debian/build/tools/lldb/test/Shell/Settings/Output/TestCxxFrameFormatRecursive.test.tmp.out
clang: warning: argument unused during compilation: '-fmodules-cache-path=/home/worker/2.0.1/lldb-x86_64-debian/build/lldb-test-build.noindex/module-cache-clang/lldb-shell' [-Wunused-command-line-argument]
/home/worker/2.0.1/lldb-x86_64-debian/build/bin/lldb --no-lldbinit -S /home/worker/2.0.1/lldb-x86_64-debian/build/tools/lldb/test/Shell/lit-lldb-init-quiet -o "settings set interpreter.stop-command-source-on-error false"        -x -b -s /home/worker/2.0.1/lldb-x86_64-debian/build/tools/lldb/test/Shell/Settings/Output/TestCxxFrameFormatRecursive.test.tmp/commands.input /home/worker/2.0.1/lldb-x86_64-debian/build/tools/lldb/test/Shell/Settings/Output/TestCxxFrameFormatRecursive.test.tmp.out -o exit 2>&1        | /home/worker/2.0.1/lldb-x86_64-debian/build/bin/FileCheck /home/worker/2.0.1/lldb-x86_64-debian/llvm-project/lldb/test/Shell/Settings/TestCxxFrameFormatRecursive.test # RUN: at line 8
+ /home/worker/2.0.1/lldb-x86_64-debian/build/bin/lldb --no-lldbinit -S /home/worker/2.0.1/lldb-x86_64-debian/build/tools/lldb/test/Shell/lit-lldb-init-quiet -o 'settings set interpreter.stop-command-source-on-error false' -x -b -s /home/worker/2.0.1/lldb-x86_64-debian/build/tools/lldb/test/Shell/Settings/Output/TestCxxFrameFormatRecursive.test.tmp/commands.input /home/worker/2.0.1/lldb-x86_64-debian/build/tools/lldb/test/Shell/Settings/Output/TestCxxFrameFormatRecursive.test.tmp.out -o exit
+ /home/worker/2.0.1/lldb-x86_64-debian/build/bin/FileCheck /home/worker/2.0.1/lldb-x86_64-debian/llvm-project/lldb/test/Shell/Settings/TestCxxFrameFormatRecursive.test

--

********************
********************
Timed Out Tests (1):
  lldb-shell :: Settings/TestCxxFrameFormatRecursive.test


Testing Time: 637.92s

Total Discovered Tests: 33276
  Skipped          :     2 (0.01%)
  Unsupported      :   458 (1.38%)
  Passed           : 32790 (98.54%)
  Expectedly Failed:    25 (0.08%)
  Timed Out        :     1 (0.00%)
FAILED: tools/lldb/test/CMakeFiles/check-lldb /home/worker/2.0.1/lldb-x86_64-debian/build/tools/lldb/test/CMakeFiles/check-lldb 
cd /home/worker/2.0.1/lldb-x86_64-debian/build/tools/lldb/test && /usr/bin/python3 /home/worker/2.0.1/lldb-x86_64-debian/build/./bin/llvm-lit -v /home/worker/2.0.1/lldb-x86_64-debian/build/tools/lldb/test
ninja: build stopped: subcommand failed.

```

</details>

https://github.com/llvm/llvm-project/pull/142355