[llvm] [Transform] Clean up strlen loop idiom (PR #132421)

[LLVM Continuous Integration via llvm-commits]

llvm-ci wrote:

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

Full details are available at: https://lab.llvm.org/buildbot/#/builders/18/builds/13320

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

```
Step 6 (test) failure: build (failure)
...
PASS: lldb-api :: lang/cpp/printf/TestPrintf.py (838 of 2928)
PASS: lldb-api :: lang/cpp/preferred_name/TestPreferredName.py (839 of 2928)
PASS: lldb-api :: lang/cpp/rvalue-references/TestRvalueReferences.py (840 of 2928)
PASS: lldb-api :: lang/cpp/scope/TestCppScope.py (841 of 2928)
UNSUPPORTED: lldb-api :: lang/cpp/standards/cpp20/TestCPP20Standard.py (842 of 2928)
PASS: lldb-api :: lang/cpp/sizeof/TestCPPSizeof.py (843 of 2928)
PASS: lldb-api :: lang/cpp/signed_types/TestSignedTypes.py (844 of 2928)
PASS: lldb-api :: lang/cpp/static_member_type_depending_on_parent_size/TestStaticMemberTypeDependingOnParentSize.py (845 of 2928)
UNSUPPORTED: lldb-api :: lang/cpp/std-function-recognizer/TestStdFunctionRecognizer.py (846 of 2928)
UNSUPPORTED: lldb-api :: lang/cpp/std-function-step-into-callable/TestStdFunctionStepIntoCallable.py (847 of 2928)
FAIL: lldb-api :: lang/cpp/static_methods/TestCPPStaticMethods.py (848 of 2928)
******************** TEST 'lldb-api :: lang/cpp/static_methods/TestCPPStaticMethods.py' FAILED ********************
Script:
--
/usr/bin/python3.10 /home/tcwg-buildbot/worker/lldb-arm-ubuntu/llvm-project/lldb/test/API/dotest.py -u CXXFLAGS -u CFLAGS --env LLVM_LIBS_DIR=/home/tcwg-buildbot/worker/lldb-arm-ubuntu/build/./lib --env LLVM_INCLUDE_DIR=/home/tcwg-buildbot/worker/lldb-arm-ubuntu/build/include --env LLVM_TOOLS_DIR=/home/tcwg-buildbot/worker/lldb-arm-ubuntu/build/./bin --arch armv8l --build-dir /home/tcwg-buildbot/worker/lldb-arm-ubuntu/build/lldb-test-build.noindex --lldb-module-cache-dir /home/tcwg-buildbot/worker/lldb-arm-ubuntu/build/lldb-test-build.noindex/module-cache-lldb/lldb-api --clang-module-cache-dir /home/tcwg-buildbot/worker/lldb-arm-ubuntu/build/lldb-test-build.noindex/module-cache-clang/lldb-api --executable /home/tcwg-buildbot/worker/lldb-arm-ubuntu/build/./bin/lldb --compiler /home/tcwg-buildbot/worker/lldb-arm-ubuntu/build/./bin/clang --dsymutil /home/tcwg-buildbot/worker/lldb-arm-ubuntu/build/./bin/dsymutil --make /usr/bin/gmake --llvm-tools-dir /home/tcwg-buildbot/worker/lldb-arm-ubuntu/build/./bin --lldb-obj-root /home/tcwg-buildbot/worker/lldb-arm-ubuntu/build/tools/lldb --lldb-libs-dir /home/tcwg-buildbot/worker/lldb-arm-ubuntu/build/./lib /home/tcwg-buildbot/worker/lldb-arm-ubuntu/llvm-project/lldb/test/API/lang/cpp/static_methods -p TestCPPStaticMethods.py
--
Exit Code: -11

Command Output (stdout):
--
lldb version 21.0.0git (https://github.com/llvm/llvm-project.git revision 7c52886700a5a70d873400ec022a99d7dce8b03b)
  clang revision 7c52886700a5a70d873400ec022a99d7dce8b03b
  llvm revision 7c52886700a5a70d873400ec022a99d7dce8b03b
Skipping the following test categories: ['libc++', 'dsym', 'gmodules', 'debugserver', 'objc']

--
Command Output (stderr):
--
UNSUPPORTED: LLDB (/home/tcwg-buildbot/worker/lldb-arm-ubuntu/build/bin/clang-arm) :: test_with_run_command_dsym (TestCPPStaticMethods.CPPStaticMethodsTestCase) (test case does not fall in any category of interest for this run) 
PASS: LLDB (/home/tcwg-buildbot/worker/lldb-arm-ubuntu/build/bin/clang-arm) :: test_with_run_command_dwarf (TestCPPStaticMethods.CPPStaticMethodsTestCase)
PASS: LLDB (/home/tcwg-buildbot/worker/lldb-arm-ubuntu/build/bin/clang-arm) :: test_with_run_command_dwo (TestCPPStaticMethods.CPPStaticMethodsTestCase)
----------------------------------------------------------------------
Ran 3 tests in 0.954s

OK (skipped=1)

--

********************
PASS: lldb-api :: lang/cpp/scratch-context-merging/structs/TestCppScratchContextMergingStructs.py (849 of 2928)
PASS: lldb-api :: lang/cpp/step-through-trampoline/TestStepThroughTrampoline.py (850 of 2928)
PASS: lldb-api :: lang/cpp/struct_with_keyword_name/TestStructWithKeywordName.py (851 of 2928)
UNSUPPORTED: lldb-api :: lang/cpp/structured-binding/TestStructuredBinding.py (852 of 2928)
PASS: lldb-api :: lang/cpp/subst_template_type_param/TestSubstTemplateTypeParam.py (853 of 2928)
PASS: lldb-api :: lang/cpp/static_members/TestCPPStaticMembers.py (854 of 2928)
PASS: lldb-api :: lang/cpp/template-arguments/TestCppTemplateArguments.py (855 of 2928)
PASS: lldb-api :: lang/cpp/symbols/TestSymbols.py (856 of 2928)
PASS: lldb-api :: lang/cpp/template-specialization-type/TestTemplateSpecializationType.py (857 of 2928)
PASS: lldb-api :: lang/cpp/stl/TestSTL.py (858 of 2928)

```

</details>

https://github.com/llvm/llvm-project/pull/132421