[llvm] [IR] Remove mul constant expression (PR #127046)

[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/16206

<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/data-formatter/summary-string-onfail/Test-rdar-9974002.py (578 of 2777)
PASS: lldb-api :: lang/cpp/symbols/TestSymbols.py (579 of 2777)
PASS: lldb-api :: lang/cpp/frame-var-depth-and-elem-count/TestFrameVarDepthAndElemCount.py (580 of 2777)
PASS: lldb-api :: python_api/value/empty_class/TestValueAPIEmptyClass.py (581 of 2777)
PASS: lldb-api :: functionalities/memory/cache/TestMemoryCache.py (582 of 2777)
PASS: lldb-api :: python_api/sbvalue_unsigned_enum_bitfield_value/TestSBValueUnsignedEnumBitField.py (583 of 2777)
PASS: lldb-api :: commands/source/info/TestSourceInfo.py (584 of 2777)
PASS: lldb-api :: functionalities/plugins/python_os_plugin/TestPythonOSPlugin.py (585 of 2777)
PASS: lldb-api :: python_api/function_symbol/TestSymbolAPI.py (586 of 2777)
PASS: lldb-api :: commands/expression/ignore-artificial-constructors/TestIgnoreArtificialConstructors.py (587 of 2777)
FAIL: lldb-api :: tools/lldb-dap/output/TestDAP_output.py (588 of 2777)
******************** TEST 'lldb-api :: tools/lldb-dap/output/TestDAP_output.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/output -p TestDAP_output.py
--
Exit Code: 1

Command Output (stdout):
--
lldb version 21.0.0git (https://github.com/llvm/llvm-project.git revision d8b2e432d633e175a87e8fbc00e0f7a627ac4c9e)
  clang revision d8b2e432d633e175a87e8fbc00e0f7a627ac4c9e
  llvm revision d8b2e432d633e175a87e8fbc00e0f7a627ac4c9e
Skipping the following test categories: ['libc++', 'dsym', 'gmodules', 'debugserver', 'objc']
========= DEBUG ADAPTER PROTOCOL LOGS =========
1739522214.273759127 --> 
Content-Length: 344

{
  "arguments": {
    "adapterID": "lldb-native",
    "clientID": "vscode",
    "columnsStartAt1": true,
    "linesStartAt1": true,
    "locale": "en-us",
    "pathFormat": "path",
    "sourceInitFile": false,
    "supportsRunInTerminalRequest": true,
    "supportsStartDebuggingRequest": true,
    "supportsVariablePaging": true,
    "supportsVariableType": true
  },
  "command": "initialize",
  "seq": 1,
  "type": "request"
}
1739522214.276621819 <-- 
Content-Length: 1631


```

</details>

https://github.com/llvm/llvm-project/pull/127046