[llvm] [ADT] Deprecate StringSwitch Cases with 4+ args. NFC. (PR #164276)

Mon Oct 20 12:23:31 PDT 2025

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `clang-m68k-linux-cross` running on `suse-gary-m68k-cross` while building `llvm` at step 5 "ninja check 1".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/27/builds/17793

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

```
Step 5 (ninja check 1) failure: stage 1 checked (failure)
...
[299/893] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/Tooling/LookupTest.cpp.o
[300/893] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/Tooling/RecursiveASTVisitorTests/CXXMemberCall.cpp.o
[301/893] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/Tooling/QualTypeNamesTest.cpp.o
[302/893] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/Tooling/RecursiveASTVisitorTests/IntegerLiteral.cpp.o
[303/893] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/Tooling/RecursiveASTVisitorTests/LambdaDefaultCapture.cpp.o
[304/893] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/Tooling/RecursiveASTVisitorTests/LambdaTemplateParams.cpp.o
[305/893] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/Tooling/RecursiveASTVisitorTests/LambdaExpr.cpp.o
[306/893] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/Tooling/RewriterTest.cpp.o
[307/893] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/Tooling/DependencyScanning/DependencyScannerTest.cpp.o
[308/893] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/AST/ASTImporterTest.cpp.o
FAILED: tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/AST/ASTImporterTest.cpp.o 
/usr/bin/c++ -DGTEST_HAS_RTTI=0 -DLLVM_BUILD_STATIC -D_DEBUG -D_GLIBCXX_ASSERTIONS -D_GLIBCXX_USE_CXX11_ABI=1 -D_GNU_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -I/var/lib/buildbot/workers/suse-gary-m68k-cross/clang-m68k-linux-cross/stage1/tools/clang/unittests -I/var/lib/buildbot/workers/suse-gary-m68k-cross/clang-m68k-linux-cross/llvm/clang/unittests -I/var/lib/buildbot/workers/suse-gary-m68k-cross/clang-m68k-linux-cross/llvm/clang/include -I/var/lib/buildbot/workers/suse-gary-m68k-cross/clang-m68k-linux-cross/stage1/tools/clang/include -I/var/lib/buildbot/workers/suse-gary-m68k-cross/clang-m68k-linux-cross/stage1/include -I/var/lib/buildbot/workers/suse-gary-m68k-cross/clang-m68k-linux-cross/llvm/llvm/include -I/var/lib/buildbot/workers/suse-gary-m68k-cross/clang-m68k-linux-cross/llvm/clang/unittests/Tooling -I/var/lib/buildbot/workers/suse-gary-m68k-cross/clang-m68k-linux-cross/llvm/third-party/unittest/googletest/include -I/var/lib/buildbot/workers/suse-gary-m68k-cross/clang-m68k-linux-cross/llvm/third-party/unittest/googlemock/include -fPIC -fno-semantic-interposition -fvisibility-inlines-hidden -Werror=date-time -Wall -Wextra -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wno-missing-field-initializers -pedantic -Wno-long-long -Wimplicit-fallthrough -Wno-uninitialized -Wno-nonnull -Wno-class-memaccess -Wno-dangling-reference -Wno-redundant-move -Wno-pessimizing-move -Wno-array-bounds -Wno-stringop-overread -Wno-noexcept-type -Wdelete-non-virtual-dtor -Wsuggest-override -Wno-comment -Wno-misleading-indentation -Wctad-maybe-unsupported -fdiagnostics-color -ffunction-sections -fdata-sections -fno-common -Woverloaded-virtual -O3 -DNDEBUG -std=c++17  -Wno-variadic-macros -fno-exceptions -funwind-tables -fno-rtti -UNDEBUG -Wno-suggest-override -MD -MT tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/AST/ASTImporterTest.cpp.o -MF tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/AST/ASTImporterTest.cpp.o.d -o tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/AST/ASTImporterTest.cpp.o -c /var/lib/buildbot/workers/suse-gary-m68k-cross/clang-m68k-linux-cross/llvm/clang/unittests/AST/ASTImporterTest.cpp
c++: fatal error: Killed signal terminated program cc1plus
compilation terminated.
[309/893] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/Tooling/RecursiveASTVisitorTests/MemberPointerTypeLoc.cpp.o
[310/893] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/Tooling/RecursiveASTVisitorTests/NestedNameSpecifiers.cpp.o
[311/893] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/Tooling/RecursiveASTVisitorTests/TraversalScope.cpp.o
[312/893] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/Tooling/RefactoringActionRulesTest.cpp.o
[313/893] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/Tooling/ReplacementsYamlTest.cpp.o
[314/893] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/Tooling/ToolingTest.cpp.o
[315/893] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/Tooling/RecursiveASTVisitorTests/Attr.cpp.o
[316/893] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/Tooling/RecursiveASTVisitorTests/InitListExprPostOrder.cpp.o
[317/893] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/Tooling/RecursiveASTVisitorTests/InitListExprPostOrderNoQueue.cpp.o
[318/893] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/Tooling/RecursiveASTVisitorTests/ParenExpr.cpp.o
[319/893] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/Tooling/Syntax/SynthesisTest.cpp.o
[320/893] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/Tooling/Syntax/TreeTestBase.cpp.o
[321/893] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/Tooling/RecursiveASTVisitorTestDeclVisitor.cpp.o
[322/893] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/Tooling/RecursiveASTVisitorTests/TemplateArgumentLocTraverser.cpp.o
[323/893] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/ASTMatchers/ASTMatchersNodeTest.cpp.o
[324/893] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/Tooling/RecursiveASTVisitorTestTypeLocVisitor.cpp.o
[325/893] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/Tooling/RangeSelectorTest.cpp.o
[326/893] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/Tooling/Syntax/MutationsTest.cpp.o
[327/893] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/Tooling/RefactoringTest.cpp.o
[328/893] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/Tooling/Syntax/BuildTreeTest.cpp.o
[329/893] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/Tooling/SourceCodeBuildersTest.cpp.o
[330/893] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/Tooling/SourceCodeTest.cpp.o
[331/893] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/Tooling/RefactoringCallbacksTest.cpp.o
[332/893] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/Tooling/StencilTest.cpp.o
[333/893] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/Tooling/RecursiveASTVisitorTests/CallbacksBinaryOperator.cpp.o
[334/893] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/ASTMatchers/ASTMatchersNarrowingTest.cpp.o
[335/893] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/Tooling/RecursiveASTVisitorTests/CallbacksCompoundAssignOperator.cpp.o
[336/893] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/Tooling/TransformerTest.cpp.o
[337/893] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/Tooling/RecursiveASTVisitorTestPostOrderVisitor.cpp.o
[338/893] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/Tooling/RecursiveASTVisitorTests/CallbacksCallExpr.cpp.o
[339/893] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/Tooling/RecursiveASTVisitorTests/CallbacksLeaf.cpp.o
[340/893] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/Tooling/RecursiveASTVisitorTests/CallbacksUnaryOperator.cpp.o
[341/893] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/ASTMatchers/ASTMatchersTraversalTest.cpp.o
ninja: build stopped: subcommand failed.

```

</details>

https://github.com/llvm/llvm-project/pull/164276