[libcxx-commits] [clang] [libcxx] [Clang] Add __builtin_common_reference (PR #121199)

Mon Dec 1 07:18:22 PST 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 `clang,libcxx` at step 5 "ninja check 1".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/27/builds/19672

<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)
...
[51/406] Building CXX object tools/clang/tools/extra/unittests/clang-tidy/CMakeFiles/ClangTidyTests.dir/ClangTidyDiagnosticConsumerTest.cpp.o
[52/406] Building CXX object tools/clang/tools/extra/unittests/clang-change-namespace/CMakeFiles/ClangChangeNamespaceTests.dir/ChangeNamespaceTests.cpp.o
[53/406] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/Analysis/FlowSensitive/DataflowAnalysisContextTest.cpp.o
[54/406] Building CXX object tools/clang/tools/extra/unittests/clang-tidy/CMakeFiles/ClangTidyTests.dir/TransformerClangTidyCheckTest.cpp.o
[55/406] Building CXX object tools/clang/tools/extra/include-cleaner/unittests/CMakeFiles/ClangIncludeCleanerTests.dir/FindHeadersTest.cpp.o
[56/406] Building CXX object tools/clang/tools/extra/unittests/clang-tidy/CMakeFiles/ClangTidyTests.dir/IncludeInserterTest.cpp.o
[57/406] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/Analysis/IntervalPartitionTest.cpp.o
[58/406] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/Analysis/CFGTest.cpp.o
[59/406] Building CXX object tools/clang/tools/extra/unittests/clang-tidy/CMakeFiles/ClangTidyTests.dir/AddConstTest.cpp.o
[60/406] Building CXX object tools/clang/tools/extra/unittests/clang-tidy/CMakeFiles/ClangTidyTests.dir/OverlappingReplacementsTest.cpp.o
FAILED: tools/clang/tools/extra/unittests/clang-tidy/CMakeFiles/ClangTidyTests.dir/OverlappingReplacementsTest.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/tools/extra/unittests/clang-tidy -I/var/lib/buildbot/workers/suse-gary-m68k-cross/clang-m68k-linux-cross/llvm/clang-tools-extra/unittests/clang-tidy -I/var/lib/buildbot/workers/suse-gary-m68k-cross/clang-m68k-linux-cross/llvm/clang-tools-extra/unittests/clang-tidy/../../include-cleaner/include -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-tools-extra/clang-tidy -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/tools/extra/unittests/clang-tidy/CMakeFiles/ClangTidyTests.dir/OverlappingReplacementsTest.cpp.o -MF tools/clang/tools/extra/unittests/clang-tidy/CMakeFiles/ClangTidyTests.dir/OverlappingReplacementsTest.cpp.o.d -o tools/clang/tools/extra/unittests/clang-tidy/CMakeFiles/ClangTidyTests.dir/OverlappingReplacementsTest.cpp.o -c /var/lib/buildbot/workers/suse-gary-m68k-cross/clang-m68k-linux-cross/llvm/clang-tools-extra/unittests/clang-tidy/OverlappingReplacementsTest.cpp
c++: fatal error: Killed signal terminated program cc1plus
compilation terminated.
[61/406] Building CXX object tools/clang/tools/extra/clangd/unittests/CMakeFiles/ClangdTests.dir/ASTTests.cpp.o
[62/406] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/Analysis/FlowSensitive/CachedConstAccessorsLatticeTest.cpp.o
[63/406] Building CXX object tools/clang/tools/extra/clangd/unittests/CMakeFiles/ClangdTests.dir/FormatTests.cpp.o
[64/406] Building CXX object tools/clang/tools/extra/clangd/unittests/CMakeFiles/ClangdTests.dir/FeatureModulesTests.cpp.o
[65/406] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/Analysis/FlowSensitive/MapLatticeTest.cpp.o
[66/406] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/Analysis/FlowSensitive/ChromiumCheckModelTest.cpp.o
[67/406] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/Analysis/FlowSensitive/DeterminismTest.cpp.o
[68/406] Building CXX object tools/clang/tools/extra/clangd/unittests/CMakeFiles/ClangdTests.dir/CodeCompletionStringsTests.cpp.o
[69/406] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/Analysis/FlowSensitive/DebugSupportTest.cpp.o
[70/406] Building CXX object tools/clang/tools/extra/clangd/unittests/CMakeFiles/ClangdTests.dir/DumpASTTests.cpp.o
[71/406] Building CXX object tools/clang/tools/extra/clangd/unittests/CMakeFiles/ClangdTests.dir/CollectMacrosTests.cpp.o
[72/406] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/Analysis/FlowSensitive/MatchSwitchTest.cpp.o
[73/406] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/Analysis/FlowSensitive/CFGMatchSwitchTest.cpp.o
[74/406] Building CXX object tools/clang/tools/extra/clangd/unittests/CMakeFiles/ClangdTests.dir/CallHierarchyTests.cpp.o
[75/406] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/Analysis/FlowSensitive/ASTOpsTest.cpp.o
[76/406] Building CXX object tools/clang/tools/extra/clangd/unittests/CMakeFiles/ClangdTests.dir/FeatureModulesRegistryTests.cpp.o
[77/406] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/Analysis/LifetimeSafetyTest.cpp.o
/var/lib/buildbot/workers/suse-gary-m68k-cross/clang-m68k-linux-cross/llvm/clang/unittests/Analysis/LifetimeSafetyTest.cpp: In instantiation of ‘bool clang::lifetimes::internal::{anonymous}::AreLiveAtImplMatcherP2<Annotation_type, ConfFilter_type>::gmock_Impl<arg_type>::MatchAndExplain(const arg_type&, testing::MatchResultListener*) const [with arg_type = const clang::lifetimes::internal::{anonymous}::OriginsInfo&; Annotation_type = const char*; ConfFilter_type = clang::lifetimes::internal::{anonymous}::LivenessKindFilter]’:
/var/lib/buildbot/workers/suse-gary-m68k-cross/clang-m68k-linux-cross/llvm/clang/unittests/Analysis/LifetimeSafetyTest.cpp:303:1:   required from here
  303 | MATCHER_P2(AreLiveAtImpl, Annotation, ConfFilter, "") {
/var/lib/buildbot/workers/suse-gary-m68k-cross/clang-m68k-linux-cross/llvm/clang/unittests/Analysis/LifetimeSafetyTest.cpp:313:19: warning: loop variable ‘<structured bindings>’ creates a copy from type ‘const std::pair<clang::lifetimes::internal::utils::ID<clang::lifetimes::internal::OriginTag>, clang::lifetimes::internal::LivenessKind>’ [-Wrange-loop-construct]
  313 |   for (const auto [OID, ActualConfidence] : ActualLiveSetOpt.value()) {
      |                   ^~~~~~~~~~~~~~~~~~~~~~~
/var/lib/buildbot/workers/suse-gary-m68k-cross/clang-m68k-linux-cross/llvm/clang/unittests/Analysis/LifetimeSafetyTest.cpp:313:19: note: use reference type to prevent copying
  313 |   for (const auto [OID, ActualConfidence] : ActualLiveSetOpt.value()) {
      |                   ^~~~~~~~~~~~~~~~~~~~~~~
      |                   &
[78/406] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/Analysis/FlowSensitive/LoggerTest.cpp.o
[79/406] Building CXX object tools/clang/tools/extra/clangd/unittests/CMakeFiles/ClangdTests.dir/ASTSignalsTests.cpp.o
[80/406] Building CXX object tools/clang/tools/extra/clangd/unittests/CMakeFiles/ClangdTests.dir/ClangdLSPServerTests.cpp.o
[81/406] Building CXX object tools/clang/tools/extra/clangd/unittests/CMakeFiles/ClangdTests.dir/ExpectedTypeTest.cpp.o
[82/406] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/Analysis/FlowSensitive/DataflowEnvironmentTest.cpp.o
[83/406] Building CXX object tools/clang/unittests/CMakeFiles/AllClangUnitTests.dir/Analysis/ExprMutationAnalyzerTest.cpp.o
[84/406] Building CXX object tools/clang/tools/extra/clangd/unittests/CMakeFiles/ClangdTests.dir/FindTargetTests.cpp.o
[85/406] Building CXX object tools/clang/tools/extra/clangd/unittests/CMakeFiles/ClangdTests.dir/BackgroundIndexTests.cpp.o

```

</details>

https://github.com/llvm/llvm-project/pull/121199