[libunwind] [llvm] [AArch64][Libunwind] Add Support for FEAT_PAuthLR DWARF Instruction (PR #112171)

Mon Oct 28 02:07:40 PDT 2024

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `ppc64le-lld-multistage-test` running on `ppc64le-lld-multistage-test` while building `libunwind,llvm` at step 12 "build-stage2-unified-tree".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/168/builds/4846

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

```
Step 12 (build-stage2-unified-tree) failure: build (failure)
...
22.818 [1/8/15] Building CXX object tools/clang/utils/TableGen/CMakeFiles/clang-tblgen.dir/ClangOptionDocEmitter.cpp.o
26.477 [1/7/16] Building CXX object tools/clang/utils/TableGen/CMakeFiles/clang-tblgen.dir/ClangOpenCLBuiltinEmitter.cpp.o
33.407 [1/6/17] Building CXX object tools/clang/utils/TableGen/CMakeFiles/clang-tblgen.dir/RISCVVEmitter.cpp.o
35.348 [1/5/18] Building CXX object tools/clang/utils/TableGen/CMakeFiles/clang-tblgen.dir/SveEmitter.cpp.o
39.266 [1/4/19] Building CXX object tools/clang/utils/TableGen/CMakeFiles/clang-tblgen.dir/ClangDiagnosticsEmitter.cpp.o
42.972 [1/3/20] Building CXX object tools/clang/utils/TableGen/CMakeFiles/clang-tblgen.dir/MveEmitter.cpp.o
45.411 [1/2/21] Building CXX object tools/clang/utils/TableGen/CMakeFiles/clang-tblgen.dir/NeonEmitter.cpp.o
64.806 [1/1/22] Building CXX object tools/clang/utils/TableGen/CMakeFiles/clang-tblgen.dir/ClangAttrEmitter.cpp.o
64.898 [0/1/23] Linking CXX executable bin/clang-tblgen
100.899 [3881/1068/1358] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/MachineOperand.cpp.o
FAILED: lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/MachineOperand.cpp.o 
ccache /home/buildbots/llvm-external-buildbots/workers/ppc64le-lld-multistage-test/ppc64le-lld-multistage-test/install/stage1/bin/clang++ -DGTEST_HAS_RTTI=0 -D_DEBUG -D_GLIBCXX_ASSERTIONS -D_GNU_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -I/home/buildbots/llvm-external-buildbots/workers/ppc64le-lld-multistage-test/ppc64le-lld-multistage-test/build/stage2/lib/CodeGen -I/home/buildbots/llvm-external-buildbots/workers/ppc64le-lld-multistage-test/ppc64le-lld-multistage-test/llvm-project/llvm/lib/CodeGen -I/home/buildbots/llvm-external-buildbots/workers/ppc64le-lld-multistage-test/ppc64le-lld-multistage-test/build/stage2/include -I/home/buildbots/llvm-external-buildbots/workers/ppc64le-lld-multistage-test/ppc64le-lld-multistage-test/llvm-project/llvm/include -fPIC -fno-semantic-interposition -fvisibility-inlines-hidden -Werror -Werror=date-time -Werror=unguarded-availability-new -Wall -Wextra -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wmissing-field-initializers -pedantic -Wno-long-long -Wc++98-compat-extra-semi -Wimplicit-fallthrough -Wcovered-switch-default -Wno-noexcept-type -Wnon-virtual-dtor -Wdelete-non-virtual-dtor -Wsuggest-override -Wstring-conversion -Wmisleading-indentation -Wctad-maybe-unsupported -fdiagnostics-color -ffunction-sections -fdata-sections -O3 -DNDEBUG -std=c++17  -fno-exceptions -funwind-tables -fno-rtti -UNDEBUG -MD -MT lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/MachineOperand.cpp.o -MF lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/MachineOperand.cpp.o.d -o lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/MachineOperand.cpp.o -c /home/buildbots/llvm-external-buildbots/workers/ppc64le-lld-multistage-test/ppc64le-lld-multistage-test/llvm-project/llvm/lib/CodeGen/MachineOperand.cpp
/home/buildbots/llvm-external-buildbots/workers/ppc64le-lld-multistage-test/ppc64le-lld-multistage-test/llvm-project/llvm/lib/CodeGen/MachineOperand.cpp:775:3: error: unannotated fall-through between switch labels [-Werror,-Wimplicit-fallthrough]
  775 |   default:
      |   ^
/home/buildbots/llvm-external-buildbots/workers/ppc64le-lld-multistage-test/ppc64le-lld-multistage-test/llvm-project/llvm/lib/CodeGen/MachineOperand.cpp:775:3: note: insert 'LLVM_FALLTHROUGH;' to silence this warning
  775 |   default:
      |   ^
      |   LLVM_FALLTHROUGH; 
/home/buildbots/llvm-external-buildbots/workers/ppc64le-lld-multistage-test/ppc64le-lld-multistage-test/llvm-project/llvm/lib/CodeGen/MachineOperand.cpp:775:3: note: insert 'break;' to avoid fall-through
  775 |   default:
      |   ^
      |   break; 
1 error generated.
133.857 [3881/31/2395] Building CXX object lib/AsmParser/CMakeFiles/LLVMAsmParser.dir/LLParser.cpp.o
134.854 [3881/29/2397] Building CXX object tools/llvm-profdata/CMakeFiles/llvm-profdata.dir/llvm-profdata.cpp.o
134.885 [3881/28/2398] Building CXX object lib/CodeGen/SelectionDAG/CMakeFiles/LLVMSelectionDAG.dir/SelectionDAG.cpp.o
135.946 [3881/27/2399] Building CXX object lib/LTO/CMakeFiles/LLVMLTO.dir/LTO.cpp.o
136.593 [3881/26/2400] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/LiveDebugValues/InstrRefBasedImpl.cpp.o
136.711 [3881/25/2401] Building CXX object unittests/IR/CMakeFiles/IRTests.dir/MetadataTest.cpp.o
137.756 [3881/24/2402] Building CXX object lib/CodeGen/SelectionDAG/CMakeFiles/LLVMSelectionDAG.dir/SelectionDAGBuilder.cpp.o
138.715 [3881/23/2403] Building CXX object lib/Passes/CMakeFiles/LLVMPasses.dir/PassBuilderPipelines.cpp.o
139.386 [3881/22/2404] Building CXX object lib/Bitcode/Reader/CMakeFiles/LLVMBitReader.dir/BitcodeReader.cpp.o
139.496 [3881/21/2405] Building CXX object unittests/Support/CMakeFiles/SupportTests.dir/VirtualFileSystemTest.cpp.o
139.516 [3881/20/2406] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/CodeGenPrepare.cpp.o
140.381 [3881/19/2407] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/ScalarEvolution.cpp.o
140.598 [3881/18/2408] Building CXX object unittests/ProfileData/CMakeFiles/ProfileDataTests.dir/InstrProfTest.cpp.o
143.197 [3881/17/2409] Building CXX object unittests/ADT/CMakeFiles/ADTTests.dir/DenseMapTest.cpp.o
143.316 [3881/16/2410] Building CXX object lib/Object/CMakeFiles/LLVMObject.dir/ELF.cpp.o
144.822 [3881/15/2411] Building CXX object tools/obj2yaml/CMakeFiles/obj2yaml.dir/elf2yaml.cpp.o
145.234 [3881/14/2412] Building CXX object lib/Transforms/Vectorize/CMakeFiles/LLVMVectorize.dir/LoopVectorize.cpp.o
146.789 [3881/13/2413] Building CXX object unittests/Transforms/Scalar/CMakeFiles/ScalarTests.dir/LoopPassManagerTest.cpp.o
148.002 [3881/12/2414] Building CXX object lib/CodeGen/SelectionDAG/CMakeFiles/LLVMSelectionDAG.dir/DAGCombiner.cpp.o
148.079 [3881/11/2415] Building CXX object unittests/ADT/CMakeFiles/ADTTests.dir/APFloatTest.cpp.o
148.323 [3881/10/2416] Building CXX object lib/Transforms/IPO/CMakeFiles/LLVMipo.dir/MemProfContextDisambiguation.cpp.o
150.435 [3881/9/2417] Building CXX object unittests/IR/CMakeFiles/IRTests.dir/PassBuilderCallbacksTest.cpp.o
151.552 [3881/8/2418] Building CXX object unittests/Frontend/CMakeFiles/LLVMFrontendTests.dir/OpenMPIRBuilderTest.cpp.o
151.973 [3881/7/2419] Building CXX object lib/Transforms/IPO/CMakeFiles/LLVMipo.dir/AttributorAttributes.cpp.o
154.193 [3881/6/2420] Building CXX object unittests/SandboxIR/CMakeFiles/SandboxIRTests.dir/SandboxIRTest.cpp.o

```

</details>

https://github.com/llvm/llvm-project/pull/112171