[llvm] [LV] Split checking if tail-folding is possible, collecting masked ops. (PR #77612)

Mon Jul 8 10:04:02 PDT 2024

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `clang-aarch64-sve-vla-2stage` running on `linaro-g3-01` while building `llvm` at step 11 "build stage 2".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/41/builds/456

Here is the relevant piece of the build log for the reference:
```
Step 11 (build stage 2) failure: 'ninja' (failure)
...
[7900/8584] Building CXX object tools/flang/lib/Optimizer/Transforms/CMakeFiles/obj.FIRTransforms.dir/FunctionAttr.cpp.o
[7901/8584] Building CXX object tools/flang/runtime/CMakeFiles/obj.FortranRuntime.dir/exceptions.cpp.o
[7902/8584] Building CXX object tools/flang/runtime/CMakeFiles/obj.FortranRuntime.dir/descriptor-io.cpp.o
[7903/8584] Building CXX object tools/flang/runtime/CMakeFiles/obj.FortranRuntime.dir/environment.cpp.o
[7904/8584] Building CXX object tools/flang/runtime/CMakeFiles/obj.FortranRuntime.dir/extensions.cpp.o
[7905/8584] Building CXX object tools/flang/runtime/CMakeFiles/obj.FortranRuntime.dir/execute.cpp.o
[7906/8584] Building CXX object tools/flang/runtime/CMakeFiles/obj.FortranRuntime.dir/external-unit.cpp.o
[7907/8584] Building CXX object tools/flang/runtime/CMakeFiles/obj.FortranRuntime.dir/file.cpp.o
[7908/8584] Building CXX object tools/flang/runtime/CMakeFiles/obj.FortranRuntime.dir/edit-output.cpp.o
[7909/8584] Building CXX object tools/flang/runtime/CMakeFiles/obj.FortranRuntime.dir/edit-input.cpp.o
FAILED: tools/flang/runtime/CMakeFiles/obj.FortranRuntime.dir/edit-input.cpp.o 
/home/tcwg-buildbot/worker/clang-aarch64-sve-vla-2stage/stage1.install/bin/clang++ -DFLANG_INCLUDE_TESTS=1 -DFLANG_LITTLE_ENDIAN=1 -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/tcwg-buildbot/worker/clang-aarch64-sve-vla-2stage/stage2/tools/flang/runtime -I/home/tcwg-buildbot/worker/clang-aarch64-sve-vla-2stage/llvm/flang/runtime -I/home/tcwg-buildbot/worker/clang-aarch64-sve-vla-2stage/llvm/flang/include -I/home/tcwg-buildbot/worker/clang-aarch64-sve-vla-2stage/stage2/tools/flang/include -I/home/tcwg-buildbot/worker/clang-aarch64-sve-vla-2stage/stage2/include -I/home/tcwg-buildbot/worker/clang-aarch64-sve-vla-2stage/llvm/llvm/include -isystem /home/tcwg-buildbot/worker/clang-aarch64-sve-vla-2stage/llvm/llvm/../mlir/include -isystem /home/tcwg-buildbot/worker/clang-aarch64-sve-vla-2stage/stage2/tools/mlir/include -isystem /home/tcwg-buildbot/worker/clang-aarch64-sve-vla-2stage/stage2/tools/clang/include -isystem /home/tcwg-buildbot/worker/clang-aarch64-sve-vla-2stage/llvm/llvm/../clang/include -mcpu=neoverse-512tvb -mllvm -scalable-vectorization=preferred -mllvm -treat-scalable-fixed-error-as-warning=false -fPIC -fno-semantic-interposition -fvisibility-inlines-hidden -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 -Wno-comment -Wstring-conversion -Wmisleading-indentation -Wctad-maybe-unsupported -fdiagnostics-color -ffunction-sections -fdata-sections -Wno-deprecated-copy -Wno-string-conversion -Wno-ctad-maybe-unsupported -Wno-unused-command-line-argument -Wstring-conversion           -Wcovered-switch-default -Wno-nested-anon-types -fno-lto -O3 -DNDEBUG   -U_GLIBCXX_ASSERTIONS -U_LIBCPP_ENABLE_ASSERTIONS -UNDEBUG -std=c++17  -fno-exceptions -funwind-tables -fno-rtti -MD -MT tools/flang/runtime/CMakeFiles/obj.FortranRuntime.dir/edit-input.cpp.o -MF tools/flang/runtime/CMakeFiles/obj.FortranRuntime.dir/edit-input.cpp.o.d -o tools/flang/runtime/CMakeFiles/obj.FortranRuntime.dir/edit-input.cpp.o -c /home/tcwg-buildbot/worker/clang-aarch64-sve-vla-2stage/llvm/flang/runtime/edit-input.cpp
clang++: ../llvm/llvm/include/llvm/ADT/APInt.h:1503: uint64_t llvm::APInt::getZExtValue() const: Assertion `getActiveBits() <= 64 && "Too many bits for uint64_t"' failed.
PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace, preprocessed source, and associated run script.
Stack dump:
0.	Program arguments: /home/tcwg-buildbot/worker/clang-aarch64-sve-vla-2stage/stage1.install/bin/clang++ -DFLANG_INCLUDE_TESTS=1 -DFLANG_LITTLE_ENDIAN=1 -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/tcwg-buildbot/worker/clang-aarch64-sve-vla-2stage/stage2/tools/flang/runtime -I/home/tcwg-buildbot/worker/clang-aarch64-sve-vla-2stage/llvm/flang/runtime -I/home/tcwg-buildbot/worker/clang-aarch64-sve-vla-2stage/llvm/flang/include -I/home/tcwg-buildbot/worker/clang-aarch64-sve-vla-2stage/stage2/tools/flang/include -I/home/tcwg-buildbot/worker/clang-aarch64-sve-vla-2stage/stage2/include -I/home/tcwg-buildbot/worker/clang-aarch64-sve-vla-2stage/llvm/llvm/include -isystem /home/tcwg-buildbot/worker/clang-aarch64-sve-vla-2stage/llvm/llvm/../mlir/include -isystem /home/tcwg-buildbot/worker/clang-aarch64-sve-vla-2stage/stage2/tools/mlir/include -isystem /home/tcwg-buildbot/worker/clang-aarch64-sve-vla-2stage/stage2/tools/clang/include -isystem /home/tcwg-buildbot/worker/clang-aarch64-sve-vla-2stage/llvm/llvm/../clang/include -mcpu=neoverse-512tvb -mllvm -scalable-vectorization=preferred -mllvm -treat-scalable-fixed-error-as-warning=false -fPIC -fno-semantic-interposition -fvisibility-inlines-hidden -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 -Wno-comment -Wstring-conversion -Wmisleading-indentation -Wctad-maybe-unsupported -fdiagnostics-color -ffunction-sections -fdata-sections -Wno-deprecated-copy -Wno-string-conversion -Wno-ctad-maybe-unsupported -Wno-unused-command-line-argument -Wstring-conversion -Wcovered-switch-default -Wno-nested-anon-types -fno-lto -O3 -DNDEBUG -U_GLIBCXX_ASSERTIONS -U_LIBCPP_ENABLE_ASSERTIONS -UNDEBUG -std=c++17 -fno-exceptions -funwind-tables -fno-rtti -MD -MT tools/flang/runtime/CMakeFiles/obj.FortranRuntime.dir/edit-input.cpp.o -MF tools/flang/runtime/CMakeFiles/obj.FortranRuntime.dir/edit-input.cpp.o.d -o tools/flang/runtime/CMakeFiles/obj.FortranRuntime.dir/edit-input.cpp.o -c /home/tcwg-buildbot/worker/clang-aarch64-sve-vla-2stage/llvm/flang/runtime/edit-input.cpp
1.	<eof> parser at end of file
2.	Optimizer
3.	Running pass "require<globals-aa>,function(invalidate<aa>),require<profile-summary>,cgscc(devirt<4>(inline,function-attrs<skip-non-recursive-function-attrs>,argpromotion,openmp-opt-cgscc,function<eager-inv;no-rerun>(sroa<modify-cfg>,early-cse<memssa>,speculative-execution<only-if-divergent-target>,jump-threading,correlated-propagation,simplifycfg<bonus-inst-threshold=1;no-forward-switch-cond;switch-range-to-icmp;no-switch-to-lookup;keep-loops;no-hoist-common-insts;no-sink-common-insts;speculate-blocks;simplify-cond-branch>,instcombine<max-iterations=1;no-use-loop-info;no-verify-fixpoint>,aggressive-instcombine,libcalls-shrinkwrap,tailcallelim,simplifycfg<bonus-inst-threshold=1;no-forward-switch-cond;switch-range-to-icmp;no-switch-to-lookup;keep-loops;no-hoist-common-insts;no-sink-common-insts;speculate-blocks;simplify-cond-branch>,reassociate,constraint-elimination,loop-mssa(loop-instsimplify,loop-simplifycfg,licm<no-allowspeculation>,loop-rotate<header-duplication;no-prepare-for-lto>,licm<allowspeculation>,simple-loop-unswitch<nontrivial;trivial>),simplifycfg<bonus-inst-threshold=1;no-forward-switch-cond;switch-range-to-icmp;no-switch-to-lookup;keep-loops;no-hoist-common-insts;no-sink-common-insts;speculate-blocks;simplify-cond-branch>,instcombine<max-iterations=1;no-use-loop-info;no-verify-fixpoint>,loop(loop-idiom,indvars,simple-loop-unswitch<nontrivial;trivial>,loop-idiom-vectorize,loop-deletion,loop-unroll-full),sroa<modify-cfg>,vector-combine,mldst-motion<no-split-footer-bb>,gvn<>,sccp,bdce,instcombine<max-iterations=1;no-use-loop-info;no-verify-fixpoint>,jump-threading,correlated-propagation,adce,memcpyopt,dse,move-auto-init,loop-mssa(licm<allowspeculation>),coro-elide,simplifycfg<bonus-inst-threshold=1;no-forward-switch-cond;switch-range-to-icmp;no-switch-to-lookup;keep-loops;hoist-common-insts;sink-common-insts;speculate-blocks;simplify-cond-branch>,instcombine<max-iterations=1;no-use-loop-info;no-verify-fixpoint>),function-attrs,function(require<should-not-run-function-passes>),coro-split)),function(invalidate<should-not-run-function-passes>),cgscc(devirt<4>())" on module "/home/tcwg-buildbot/worker/clang-aarch64-sve-vla-2stage/llvm/flang/runtime/edit-input.cpp"
4.	Running pass "cgscc(devirt<4>(inline,function-attrs<skip-non-recursive-function-attrs>,argpromotion,openmp-opt-cgscc,function<eager-inv;no-rerun>(sroa<modify-cfg>,early-cse<memssa>,speculative-execution<only-if-divergent-target>,jump-threading,correlated-propagation,simplifycfg<bonus-inst-threshold=1;no-forward-switch-cond;switch-range-to-icmp;no-switch-to-lookup;keep-loops;no-hoist-common-insts;no-sink-common-insts;speculate-blocks;simplify-cond-branch>,instcombine<max-iterations=1;no-use-loop-info;no-verify-fixpoint>,aggressive-instcombine,libcalls-shrinkwrap,tailcallelim,simplifycfg<bonus-inst-threshold=1;no-forward-switch-cond;switch-range-to-icmp;no-switch-to-lookup;keep-loops;no-hoist-common-insts;no-sink-common-insts;speculate-blocks;simplify-cond-branch>,reassociate,constraint-elimination,loop-mssa(loop-instsimplify,loop-simplifycfg,licm<no-allowspeculation>,loop-rotate<header-duplication;no-prepare-for-lto>,licm<allowspeculation>,simple-loop-unswitch<nontrivial;trivial>),simplifycfg<bonus-inst-threshold=1;no-forward-switch-cond;switch-range-to-icmp;no-switch-to-lookup;keep-loops;no-hoist-common-insts;no-sink-common-insts;speculate-blocks;simplify-cond-branch>,instcombine<max-iterations=1;no-use-loop-info;no-verify-fixpoint>,loop(loop-idiom,indvars,simple-loop-unswitch<nontrivial;trivial>,loop-idiom-vectorize,loop-deletion,loop-unroll-full),sroa<modify-cfg>,vector-combine,mldst-motion<no-split-footer-bb>,gvn<>,sccp,bdce,instcombine<max-iterations=1;no-use-loop-info;no-verify-fixpoint>,jump-threading,correlated-propagation,adce,memcpyopt,dse,move-auto-init,loop-mssa(licm<allowspeculation>),coro-elide,simplifycfg<bonus-inst-threshold=1;no-forward-switch-cond;switch-range-to-icmp;no-switch-to-lookup;keep-loops;hoist-common-insts;sink-common-insts;speculate-blocks;simplify-cond-branch>,instcombine<max-iterations=1;no-use-loop-info;no-verify-fixpoint>),function-attrs,function(require<should-not-run-function-passes>),coro-split))" on module "/home/tcwg-buildbot/worker/clang-aarch64-sve-vla-2stage/llvm/flang/runtime/edit-input.cpp"
5.	Running pass "loop(loop-idiom,indvars,simple-loop-unswitch<nontrivial;trivial>,loop-idiom-vectorize,loop-deletion,loop-unroll-full)" on function "_ZN7Fortran7runtime2io18ConvertHexadecimalILi64EEENS_7decimal24ConversionToBinaryResultIXT_EEERPKcNS3_15FortranRoundingEi"
 #0 0x0000aaaabba4d480 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/home/tcwg-buildbot/worker/clang-aarch64-sve-vla-2stage/stage1.install/bin/clang+++0x79ad480)
 #1 0x0000aaaabba4b350 llvm::sys::RunSignalHandlers() (/home/tcwg-buildbot/worker/clang-aarch64-sve-vla-2stage/stage1.install/bin/clang+++0x79ab350)
 #2 0x0000aaaabba4c8d4 llvm::sys::CleanupOnSignal(unsigned long) (/home/tcwg-buildbot/worker/clang-aarch64-sve-vla-2stage/stage1.install/bin/clang+++0x79ac8d4)
 #3 0x0000aaaabb9b3f7c CrashRecoverySignalHandler(int) CrashRecoveryContext.cpp:0:0
 #4 0x0000ffff896629d0 (linux-vdso.so.1+0x9d0)
 #5 0x0000ffff891b5d78 raise /build/glibc-Q8DG8B/glibc-2.31/signal/../sysdeps/unix/sysv/linux/raise.c:51:1
 #6 0x0000ffff891a2aac abort /build/glibc-Q8DG8B/glibc-2.31/stdlib/abort.c:81:7
 #7 0x0000ffff891af490 __assert_fail_base /build/glibc-Q8DG8B/glibc-2.31/assert/assert.c:89:7
 #8 0x0000ffff891af4f4 (/lib/aarch64-linux-gnu/libc.so.6+0x2d4f4)
 #9 0x0000aaaabd1f0198 (/home/tcwg-buildbot/worker/clang-aarch64-sve-vla-2stage/stage1.install/bin/clang+++0x9150198)
#10 0x0000aaaabd1e217c (anonymous namespace)::LoopIdiomRecognize::runOnNoncountableLoop() LoopIdiomRecognize.cpp:0:0
#11 0x0000aaaabd1e0c84 llvm::LoopIdiomRecognizePass::run(llvm::Loop&, llvm::AnalysisManager<llvm::Loop, llvm::LoopStandardAnalysisResults&>&, llvm::LoopStandardAnalysisResults&, llvm::LPMUpdater&) (/home/tcwg-buildbot/worker/clang-aarch64-sve-vla-2stage/stage1.install/bin/clang+++0x9140c84)
#12 0x0000aaaabb8b1264 std::optional<llvm::PreservedAnalyses> llvm::PassManager<llvm::Loop, llvm::AnalysisManager<llvm::Loop, llvm::LoopStandardAnalysisResults&>, llvm::LoopStandardAnalysisResults&, llvm::LPMUpdater&>::runSinglePass<llvm::Loop, std::unique_ptr<llvm::detail::PassConcept<llvm::Loop, llvm::AnalysisManager<llvm::Loop, llvm::LoopStandardAnalysisResults&>, llvm::LoopStandardAnalysisResults&, llvm::LPMUpdater&>, std::default_delete<llvm::detail::PassConcept<llvm::Loop, llvm::AnalysisManager<llvm::Loop, llvm::LoopStandardAnalysisResults&>, llvm::LoopStandardAnalysisResults&, llvm::LPMUpdater&>>>>(llvm::Loop&, std::unique_ptr<llvm::detail::PassConcept<llvm::Loop, llvm::AnalysisManager<llvm::Loop, llvm::LoopStandardAnalysisResults&>, llvm::LoopStandardAnalysisResults&, llvm::LPMUpdater&>, std::default_delete<llvm::detail::PassConcept<llvm::Loop, llvm::AnalysisManager<llvm::Loop, llvm::LoopStandardAnalysisResults&>, llvm::LoopStandardAnalysisResults&, llvm::LPMUpdater&>>>&, llvm::AnalysisManager<llvm::Loop, llvm::LoopStandardAnalysisResults&>&, llvm::LoopStandardAnalysisResults&, llvm::LPMUpdater&, llvm::PassInstrumentation&) (/home/tcwg-buildbot/worker/clang-aarch64-sve-vla-2stage/stage1.install/bin/clang+++0x7811264)
#13 0x0000aaaabb8b0e9c llvm::PassManager<llvm::Loop, llvm::AnalysisManager<llvm::Loop, llvm::LoopStandardAnalysisResults&>, llvm::LoopStandardAnalysisResults&, llvm::LPMUpdater&>::runWithoutLoopNestPasses(llvm::Loop&, llvm::AnalysisManager<llvm::Loop, llvm::LoopStandardAnalysisResults&>&, llvm::LoopStandardAnalysisResults&, llvm::LPMUpdater&) (/home/tcwg-buildbot/worker/clang-aarch64-sve-vla-2stage/stage1.install/bin/clang+++0x7810e9c)
#14 0x0000aaaabb8b0680 llvm::PassManager<llvm::Loop, llvm::AnalysisManager<llvm::Loop, llvm::LoopStandardAnalysisResults&>, llvm::LoopStandardAnalysisResults&, llvm::LPMUpdater&>::run(llvm::Loop&, llvm::AnalysisManager<llvm::Loop, llvm::LoopStandardAnalysisResults&>&, llvm::LoopStandardAnalysisResults&, llvm::LPMUpdater&) (/home/tcwg-buildbot/worker/clang-aarch64-sve-vla-2stage/stage1.install/bin/clang+++0x7810680)
#15 0x0000aaaabb8b20b4 llvm::FunctionToLoopPassAdaptor::run(llvm::Function&, llvm::AnalysisManager<llvm::Function>&) (/home/tcwg-buildbot/worker/clang-aarch64-sve-vla-2stage/stage1.install/bin/clang+++0x78120b4)
#16 0x0000aaaabb4a3aac llvm::PassManager<llvm::Function, llvm::AnalysisManager<llvm::Function>>::run(llvm::Function&, llvm::AnalysisManager<llvm::Function>&) (/home/tcwg-buildbot/worker/clang-aarch64-sve-vla-2stage/stage1.install/bin/clang+++0x7403aac)
#17 0x0000aaaabaaed73c llvm::CGSCCToFunctionPassAdaptor::run(llvm::LazyCallGraph::SCC&, llvm::AnalysisManager<llvm::LazyCallGraph::SCC, llvm::LazyCallGraph&>&, llvm::LazyCallGraph&, llvm::CGSCCUpdateResult&) (/home/tcwg-buildbot/worker/clang-aarch64-sve-vla-2stage/stage1.install/bin/clang+++0x6a4d73c)
#18 0x0000aaaabaae89bc llvm::PassManager<llvm::LazyCallGraph::SCC, llvm::AnalysisManager<llvm::LazyCallGraph::SCC, llvm::LazyCallGraph&>, llvm::LazyCallGraph&, llvm::CGSCCUpdateResult&>::run(llvm::LazyCallGraph::SCC&, llvm::AnalysisManager<llvm::LazyCallGraph::SCC, llvm::LazyCallGraph&>&, llvm::LazyCallGraph&, llvm::CGSCCUpdateResult&) (/home/tcwg-buildbot/worker/clang-aarch64-sve-vla-2stage/stage1.install/bin/clang+++0x6a489bc)
#19 0x0000aaaabaaebd84 llvm::DevirtSCCRepeatedPass::run(llvm::LazyCallGraph::SCC&, llvm::AnalysisManager<llvm::LazyCallGraph::SCC, llvm::LazyCallGraph&>&, llvm::LazyCallGraph&, llvm::CGSCCUpdateResult&) (/home/tcwg-buildbot/worker/clang-aarch64-sve-vla-2stage/stage1.install/bin/clang+++0x6a4bd84)
#20 0x0000aaaabaaea3cc llvm::ModuleToPostOrderCGSCCPassAdaptor::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (/home/tcwg-buildbot/worker/clang-aarch64-sve-vla-2stage/stage1.install/bin/clang+++0x6a4a3cc)
#21 0x0000aaaabb4a2dbc llvm::PassManager<llvm::Module, llvm::AnalysisManager<llvm::Module>>::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (/home/tcwg-buildbot/worker/clang-aarch64-sve-vla-2stage/stage1.install/bin/clang+++0x7402dbc)
#22 0x0000aaaabceca810 llvm::ModuleInlinerWrapperPass::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (/home/tcwg-buildbot/worker/clang-aarch64-sve-vla-2stage/stage1.install/bin/clang+++0x8e2a810)
#23 0x0000aaaabb4a2dbc llvm::PassManager<llvm::Module, llvm::AnalysisManager<llvm::Module>>::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (/home/tcwg-buildbot/worker/clang-aarch64-sve-vla-2stage/stage1.install/bin/clang+++0x7402dbc)
#24 0x0000aaaabc1e307c (anonymous namespace)::EmitAssemblyHelper::RunOptimizationPipeline(clang::BackendAction, std::unique_ptr<llvm::raw_pwrite_stream, std::default_delete<llvm::raw_pwrite_stream>>&, std::unique_ptr<llvm::ToolOutputFile, std::default_delete<llvm::ToolOutputFile>>&, clang::BackendConsumer*) BackendUtil.cpp:0:0
#25 0x0000aaaabc1da364 clang::EmitBackendOutput(clang::DiagnosticsEngine&, clang::HeaderSearchOptions const&, clang::CodeGenOptions const&, clang::TargetOptions const&, clang::LangOptions const&, llvm::StringRef, llvm::Module*, clang::BackendAction, llvm::IntrusiveRefCntPtr<llvm::vfs::FileSystem>, std::unique_ptr<llvm::raw_pwrite_stream, std::default_delete<llvm::raw_pwrite_stream>>, clang::BackendConsumer*) (/home/tcwg-buildbot/worker/clang-aarch64-sve-vla-2stage/stage1.install/bin/clang+++0x813a364)
#26 0x0000aaaabc1fda78 clang::BackendConsumer::HandleTranslationUnit(clang::ASTContext&) (/home/tcwg-buildbot/worker/clang-aarch64-sve-vla-2stage/stage1.install/bin/clang+++0x815da78)
#27 0x0000aaaabde800a8 clang::ParseAST(clang::Sema&, bool, bool) (/home/tcwg-buildbot/worker/clang-aarch64-sve-vla-2stage/stage1.install/bin/clang+++0x9de00a8)

```

https://github.com/llvm/llvm-project/pull/77612