[llvm] [VPlan] Update scalar induction resume values in VPlan. (PR #110577)

[LLVM Continuous Integration via llvm-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `sanitizer-aarch64-linux-bootstrap-msan` running on `sanitizer-buildbot10` while building `llvm` at step 2 "annotate".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/94/builds/2683

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

```
Step 2 (annotate) failure: 'python ../sanitizer_buildbot/sanitizers/zorg/buildbot/builders/sanitizers/buildbot_selector.py' (failure)
...
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:506: note: using lld-link: /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build_msan/bin/lld-link
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:506: note: using ld64.lld: /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build_msan/bin/ld64.lld
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:506: note: using wasm-ld: /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build_msan/bin/wasm-ld
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:506: note: using ld.lld: /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build_msan/bin/ld.lld
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:506: note: using lld-link: /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build_msan/bin/lld-link
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:506: note: using ld64.lld: /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build_msan/bin/ld64.lld
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:506: note: using wasm-ld: /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build_msan/bin/wasm-ld
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/utils/lit/lit/main.py:72: note: The test suite configuration requested an individual test timeout of 0 seconds but a timeout of 900 seconds was requested on the command line. Forcing timeout to be 900 seconds.
-- Testing: 84254 tests, 48 workers --
Testing:  0
FAIL: Clang :: CodeGen/AArch64/sve-vector-bits-codegen.c (3415 of 84254)
******************** TEST 'Clang :: CodeGen/AArch64/sve-vector-bits-codegen.c' FAILED ********************
Exit Code: 2

Command Output (stderr):
--
RUN: at line 1: /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build_msan/bin/clang -cc1 -internal-isystem /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build_msan/lib/clang/20/include -nostdsysteminc -triple aarch64-none-linux-gnu -target-feature +sve -O2 -S    -mllvm -prefer-predicate-over-epilogue=scalar-epilogue -o - /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/test/CodeGen/AArch64/sve-vector-bits-codegen.c -mvscale-min=2 -mvscale-max=2  | /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build_msan/bin/FileCheck /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/test/CodeGen/AArch64/sve-vector-bits-codegen.c --check-prefixes=CHECK,CHECK256
+ /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build_msan/bin/FileCheck /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/test/CodeGen/AArch64/sve-vector-bits-codegen.c --check-prefixes=CHECK,CHECK256
+ /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build_msan/bin/clang -cc1 -internal-isystem /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build_msan/lib/clang/20/include -nostdsysteminc -triple aarch64-none-linux-gnu -target-feature +sve -O2 -S -mllvm -prefer-predicate-over-epilogue=scalar-epilogue -o - /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/test/CodeGen/AArch64/sve-vector-bits-codegen.c -mvscale-min=2 -mvscale-max=2
==1443302==WARNING: MemorySanitizer: use-of-uninitialized-value
    #0 0xaaaab9f871b0 in llvm::VPInstruction::generate(llvm::VPTransformState&) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/lib/Transforms/Vectorize/VPlanRecipes.cpp:636:7
    #1 0xaaaab9f87cb8 in llvm::VPInstruction::execute(llvm::VPTransformState&) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/lib/Transforms/Vectorize/VPlanRecipes.cpp:691:27
    #2 0xaaaab9f42654 in llvm::VPBasicBlock::executeRecipes(llvm::VPTransformState*, llvm::BasicBlock*) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/lib/Transforms/Vectorize/VPlan.cpp:535:12
    #3 0xaaaab9f41b9c in llvm::VPIRBasicBlock::execute(llvm::VPTransformState*) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/lib/Transforms/Vectorize/VPlan.cpp:463:3
    #4 0xaaaab9f504bc in llvm::VPlan::execute(llvm::VPTransformState*) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/lib/Transforms/Vectorize/VPlan.cpp:1033:12
    #5 0xaaaab9ebd730 in llvm::LoopVectorizationPlanner::executePlan(llvm::ElementCount, unsigned int, llvm::VPlan&, llvm::InnerLoopVectorizer&, llvm::DominatorTree*, bool, llvm::DenseMap<llvm::SCEV const*, llvm::Value*, llvm::DenseMapInfo<llvm::SCEV const*, void>, llvm::detail::DenseMapPair<llvm::SCEV const*, llvm::Value*>> const*) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp:7750:13
    #6 0xaaaab9eeb874 in llvm::LoopVectorizePass::processLoop(llvm::Loop*) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp:10399:13
    #7 0xaaaab9ef4b68 in llvm::LoopVectorizePass::runImpl(llvm::Function&) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp:10475:30
    #8 0xaaaab9ef5fbc in llvm::LoopVectorizePass::run(llvm::Function&, llvm::AnalysisManager<llvm::Function>&) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp:10512:32
    #9 0xaaaab5ca7d54 in llvm::PassManager<llvm::Function, llvm::AnalysisManager<llvm::Function>>::run(llvm::Function&, llvm::AnalysisManager<llvm::Function>&) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/include/llvm/IR/PassManagerImpl.h:81:38
    #10 0xaaaab5cb2b10 in llvm::ModuleToFunctionPassAdaptor::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/lib/IR/PassManager.cpp:124:38
    #11 0xaaaab5ca5638 in llvm::PassManager<llvm::Module, llvm::AnalysisManager<llvm::Module>>::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/include/llvm/IR/PassManagerImpl.h:81:38
    #12 0xaaaab7dffb50 in (anonymous namespace)::EmitAssemblyHelper::RunOptimizationPipeline(clang::BackendAction, std::__1::unique_ptr<llvm::raw_pwrite_stream, std::__1::default_delete<llvm::raw_pwrite_stream>>&, std::__1::unique_ptr<llvm::ToolOutputFile, std::__1::default_delete<llvm::ToolOutputFile>>&, clang::BackendConsumer*) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/lib/CodeGen/BackendUtil.cpp:1153:9
    #13 0xaaaab7dea1f8 in EmitAssembly /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/lib/CodeGen/BackendUtil.cpp:1218:3
    #14 0xaaaab7dea1f8 in 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::__1::unique_ptr<llvm::raw_pwrite_stream, std::__1::default_delete<llvm::raw_pwrite_stream>>, clang::BackendConsumer*) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/lib/CodeGen/BackendUtil.cpp:1382:13
    #15 0xaaaab7e4207c in clang::BackendConsumer::HandleTranslationUnit(clang::ASTContext&) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/lib/CodeGen/CodeGenAction.cpp:351:3
    #16 0xaaaabc0d7f7c in clang::ParseAST(clang::Sema&, bool, bool) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/lib/Parse/ParseAST.cpp:184:13
    #17 0xaaaab8869f94 in clang::FrontendAction::Execute() /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/lib/Frontend/FrontendAction.cpp:1077:8
    #18 0xaaaab872eb04 in clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/lib/Frontend/CompilerInstance.cpp:1062:33
    #19 0xaaaab8a875e0 in clang::ExecuteCompilerInvocation(clang::CompilerInstance*) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/lib/FrontendTool/ExecuteCompilerInvocation.cpp:296:25
    #20 0xaaaab0777038 in cc1_main(llvm::ArrayRef<char const*>, char const*, void*) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/tools/driver/cc1_main.cpp:286:15
    #21 0xaaaab0770d38 in ExecuteCC1Tool(llvm::SmallVectorImpl<char const*>&, llvm::ToolContext const&) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/tools/driver/driver.cpp:218:12
    #22 0xaaaab076ea98 in clang_main(int, char**, llvm::ToolContext const&) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/tools/driver/driver.cpp:259:12
    #23 0xaaaab0792aa4 in main /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build_msan/tools/clang/tools/driver/clang-driver.cpp:17:10
    #24 0xfffff7a584c0  (/lib/aarch64-linux-gnu/libc.so.6+0x284c0) (BuildId: 32fa4d6f3a8d5f430bdb7af2eb779470cd5ec7c2)
    #25 0xfffff7a58594 in __libc_start_main (/lib/aarch64-linux-gnu/libc.so.6+0x28594) (BuildId: 32fa4d6f3a8d5f430bdb7af2eb779470cd5ec7c2)
    #26 0xaaaab06d44ec in _start (/home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build_msan/bin/clang-20+0x5c344ec)

SUMMARY: MemorySanitizer: use-of-uninitialized-value /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/lib/Transforms/Vectorize/VPlanRecipes.cpp:636:7 in llvm::VPInstruction::generate(llvm::VPTransformState&)
Step 10 (stage2/msan check) failure: stage2/msan check (failure)
...
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:506: note: using lld-link: /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build_msan/bin/lld-link
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:506: note: using ld64.lld: /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build_msan/bin/ld64.lld
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:506: note: using wasm-ld: /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build_msan/bin/wasm-ld
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:506: note: using ld.lld: /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build_msan/bin/ld.lld
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:506: note: using lld-link: /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build_msan/bin/lld-link
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:506: note: using ld64.lld: /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build_msan/bin/ld64.lld
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:506: note: using wasm-ld: /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build_msan/bin/wasm-ld
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/utils/lit/lit/main.py:72: note: The test suite configuration requested an individual test timeout of 0 seconds but a timeout of 900 seconds was requested on the command line. Forcing timeout to be 900 seconds.
-- Testing: 84254 tests, 48 workers --
Testing:  0
FAIL: Clang :: CodeGen/AArch64/sve-vector-bits-codegen.c (3415 of 84254)
******************** TEST 'Clang :: CodeGen/AArch64/sve-vector-bits-codegen.c' FAILED ********************
Exit Code: 2

Command Output (stderr):
--
RUN: at line 1: /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build_msan/bin/clang -cc1 -internal-isystem /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build_msan/lib/clang/20/include -nostdsysteminc -triple aarch64-none-linux-gnu -target-feature +sve -O2 -S    -mllvm -prefer-predicate-over-epilogue=scalar-epilogue -o - /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/test/CodeGen/AArch64/sve-vector-bits-codegen.c -mvscale-min=2 -mvscale-max=2  | /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build_msan/bin/FileCheck /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/test/CodeGen/AArch64/sve-vector-bits-codegen.c --check-prefixes=CHECK,CHECK256
+ /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build_msan/bin/FileCheck /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/test/CodeGen/AArch64/sve-vector-bits-codegen.c --check-prefixes=CHECK,CHECK256
+ /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build_msan/bin/clang -cc1 -internal-isystem /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build_msan/lib/clang/20/include -nostdsysteminc -triple aarch64-none-linux-gnu -target-feature +sve -O2 -S -mllvm -prefer-predicate-over-epilogue=scalar-epilogue -o - /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/test/CodeGen/AArch64/sve-vector-bits-codegen.c -mvscale-min=2 -mvscale-max=2
==1443302==WARNING: MemorySanitizer: use-of-uninitialized-value
    #0 0xaaaab9f871b0 in llvm::VPInstruction::generate(llvm::VPTransformState&) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/lib/Transforms/Vectorize/VPlanRecipes.cpp:636:7
    #1 0xaaaab9f87cb8 in llvm::VPInstruction::execute(llvm::VPTransformState&) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/lib/Transforms/Vectorize/VPlanRecipes.cpp:691:27
    #2 0xaaaab9f42654 in llvm::VPBasicBlock::executeRecipes(llvm::VPTransformState*, llvm::BasicBlock*) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/lib/Transforms/Vectorize/VPlan.cpp:535:12
    #3 0xaaaab9f41b9c in llvm::VPIRBasicBlock::execute(llvm::VPTransformState*) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/lib/Transforms/Vectorize/VPlan.cpp:463:3
    #4 0xaaaab9f504bc in llvm::VPlan::execute(llvm::VPTransformState*) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/lib/Transforms/Vectorize/VPlan.cpp:1033:12
    #5 0xaaaab9ebd730 in llvm::LoopVectorizationPlanner::executePlan(llvm::ElementCount, unsigned int, llvm::VPlan&, llvm::InnerLoopVectorizer&, llvm::DominatorTree*, bool, llvm::DenseMap<llvm::SCEV const*, llvm::Value*, llvm::DenseMapInfo<llvm::SCEV const*, void>, llvm::detail::DenseMapPair<llvm::SCEV const*, llvm::Value*>> const*) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp:7750:13
    #6 0xaaaab9eeb874 in llvm::LoopVectorizePass::processLoop(llvm::Loop*) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp:10399:13
    #7 0xaaaab9ef4b68 in llvm::LoopVectorizePass::runImpl(llvm::Function&) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp:10475:30
    #8 0xaaaab9ef5fbc in llvm::LoopVectorizePass::run(llvm::Function&, llvm::AnalysisManager<llvm::Function>&) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp:10512:32
    #9 0xaaaab5ca7d54 in llvm::PassManager<llvm::Function, llvm::AnalysisManager<llvm::Function>>::run(llvm::Function&, llvm::AnalysisManager<llvm::Function>&) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/include/llvm/IR/PassManagerImpl.h:81:38
    #10 0xaaaab5cb2b10 in llvm::ModuleToFunctionPassAdaptor::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/lib/IR/PassManager.cpp:124:38
    #11 0xaaaab5ca5638 in llvm::PassManager<llvm::Module, llvm::AnalysisManager<llvm::Module>>::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/include/llvm/IR/PassManagerImpl.h:81:38
    #12 0xaaaab7dffb50 in (anonymous namespace)::EmitAssemblyHelper::RunOptimizationPipeline(clang::BackendAction, std::__1::unique_ptr<llvm::raw_pwrite_stream, std::__1::default_delete<llvm::raw_pwrite_stream>>&, std::__1::unique_ptr<llvm::ToolOutputFile, std::__1::default_delete<llvm::ToolOutputFile>>&, clang::BackendConsumer*) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/lib/CodeGen/BackendUtil.cpp:1153:9
    #13 0xaaaab7dea1f8 in EmitAssembly /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/lib/CodeGen/BackendUtil.cpp:1218:3
    #14 0xaaaab7dea1f8 in 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::__1::unique_ptr<llvm::raw_pwrite_stream, std::__1::default_delete<llvm::raw_pwrite_stream>>, clang::BackendConsumer*) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/lib/CodeGen/BackendUtil.cpp:1382:13
    #15 0xaaaab7e4207c in clang::BackendConsumer::HandleTranslationUnit(clang::ASTContext&) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/lib/CodeGen/CodeGenAction.cpp:351:3
    #16 0xaaaabc0d7f7c in clang::ParseAST(clang::Sema&, bool, bool) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/lib/Parse/ParseAST.cpp:184:13
    #17 0xaaaab8869f94 in clang::FrontendAction::Execute() /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/lib/Frontend/FrontendAction.cpp:1077:8
    #18 0xaaaab872eb04 in clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/lib/Frontend/CompilerInstance.cpp:1062:33
    #19 0xaaaab8a875e0 in clang::ExecuteCompilerInvocation(clang::CompilerInstance*) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/lib/FrontendTool/ExecuteCompilerInvocation.cpp:296:25
    #20 0xaaaab0777038 in cc1_main(llvm::ArrayRef<char const*>, char const*, void*) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/tools/driver/cc1_main.cpp:286:15
    #21 0xaaaab0770d38 in ExecuteCC1Tool(llvm::SmallVectorImpl<char const*>&, llvm::ToolContext const&) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/tools/driver/driver.cpp:218:12
    #22 0xaaaab076ea98 in clang_main(int, char**, llvm::ToolContext const&) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/tools/driver/driver.cpp:259:12
    #23 0xaaaab0792aa4 in main /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build_msan/tools/clang/tools/driver/clang-driver.cpp:17:10
    #24 0xfffff7a584c0  (/lib/aarch64-linux-gnu/libc.so.6+0x284c0) (BuildId: 32fa4d6f3a8d5f430bdb7af2eb779470cd5ec7c2)
    #25 0xfffff7a58594 in __libc_start_main (/lib/aarch64-linux-gnu/libc.so.6+0x28594) (BuildId: 32fa4d6f3a8d5f430bdb7af2eb779470cd5ec7c2)
    #26 0xaaaab06d44ec in _start (/home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build_msan/bin/clang-20+0x5c344ec)

SUMMARY: MemorySanitizer: use-of-uninitialized-value /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/lib/Transforms/Vectorize/VPlanRecipes.cpp:636:7 in llvm::VPInstruction::generate(llvm::VPTransformState&)
Step 14 (stage2/msan_track_origins check) failure: stage2/msan_track_origins check (failure)
...
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:506: note: using lld-link: /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build_msan_track_origins/bin/lld-link
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:506: note: using ld64.lld: /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build_msan_track_origins/bin/ld64.lld
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:506: note: using wasm-ld: /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build_msan_track_origins/bin/wasm-ld
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:506: note: using ld.lld: /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build_msan_track_origins/bin/ld.lld
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:506: note: using lld-link: /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build_msan_track_origins/bin/lld-link
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:506: note: using ld64.lld: /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build_msan_track_origins/bin/ld64.lld
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:506: note: using wasm-ld: /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build_msan_track_origins/bin/wasm-ld
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/utils/lit/lit/main.py:72: note: The test suite configuration requested an individual test timeout of 0 seconds but a timeout of 900 seconds was requested on the command line. Forcing timeout to be 900 seconds.
-- Testing: 84254 tests, 48 workers --
Testing:  0
FAIL: Clang :: CodeGen/AArch64/sve-vector-bits-codegen.c (3411 of 84254)
******************** TEST 'Clang :: CodeGen/AArch64/sve-vector-bits-codegen.c' FAILED ********************
Exit Code: 2

Command Output (stderr):
--
RUN: at line 1: /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build_msan_track_origins/bin/clang -cc1 -internal-isystem /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build_msan_track_origins/lib/clang/20/include -nostdsysteminc -triple aarch64-none-linux-gnu -target-feature +sve -O2 -S    -mllvm -prefer-predicate-over-epilogue=scalar-epilogue -o - /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/test/CodeGen/AArch64/sve-vector-bits-codegen.c -mvscale-min=2 -mvscale-max=2  | /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build_msan_track_origins/bin/FileCheck /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/test/CodeGen/AArch64/sve-vector-bits-codegen.c --check-prefixes=CHECK,CHECK256
+ /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build_msan_track_origins/bin/FileCheck /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/test/CodeGen/AArch64/sve-vector-bits-codegen.c --check-prefixes=CHECK,CHECK256
+ /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build_msan_track_origins/bin/clang -cc1 -internal-isystem /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build_msan_track_origins/lib/clang/20/include -nostdsysteminc -triple aarch64-none-linux-gnu -target-feature +sve -O2 -S -mllvm -prefer-predicate-over-epilogue=scalar-epilogue -o - /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/test/CodeGen/AArch64/sve-vector-bits-codegen.c -mvscale-min=2 -mvscale-max=2
==1351288==WARNING: MemorySanitizer: use-of-uninitialized-value
    #0 0xaaaabe39c7a8 in llvm::VPInstruction::generate(llvm::VPTransformState&) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/lib/Transforms/Vectorize/VPlanRecipes.cpp:636:7
    #1 0xaaaabe39ddc4 in llvm::VPInstruction::execute(llvm::VPTransformState&) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/lib/Transforms/Vectorize/VPlanRecipes.cpp:691:27
    #2 0xaaaabe339eb4 in llvm::VPBasicBlock::executeRecipes(llvm::VPTransformState*, llvm::BasicBlock*) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/lib/Transforms/Vectorize/VPlan.cpp:535:12
    #3 0xaaaabe339174 in llvm::VPIRBasicBlock::execute(llvm::VPTransformState*) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/lib/Transforms/Vectorize/VPlan.cpp:463:3
    #4 0xaaaabe34da30 in llvm::VPlan::execute(llvm::VPTransformState*) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/lib/Transforms/Vectorize/VPlan.cpp:1033:12
    #5 0xaaaabe27f92c in llvm::LoopVectorizationPlanner::executePlan(llvm::ElementCount, unsigned int, llvm::VPlan&, llvm::InnerLoopVectorizer&, llvm::DominatorTree*, bool, llvm::DenseMap<llvm::SCEV const*, llvm::Value*, llvm::DenseMapInfo<llvm::SCEV const*, void>, llvm::detail::DenseMapPair<llvm::SCEV const*, llvm::Value*>> const*) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp:7750:13
    #6 0xaaaabe2bd1dc in llvm::LoopVectorizePass::processLoop(llvm::Loop*) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp:10399:13
    #7 0xaaaabe2ca7a4 in llvm::LoopVectorizePass::runImpl(llvm::Function&) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp:10475:30
    #8 0xaaaabe2cc184 in llvm::LoopVectorizePass::run(llvm::Function&, llvm::AnalysisManager<llvm::Function>&) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp:10512:32
    #9 0xaaaab84f518c in llvm::PassManager<llvm::Function, llvm::AnalysisManager<llvm::Function>>::run(llvm::Function&, llvm::AnalysisManager<llvm::Function>&) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/include/llvm/IR/PassManagerImpl.h:81:38
    #10 0xaaaab8504824 in llvm::ModuleToFunctionPassAdaptor::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/lib/IR/PassManager.cpp:124:38
    #11 0xaaaab84f1bd0 in llvm::PassManager<llvm::Module, llvm::AnalysisManager<llvm::Module>>::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/include/llvm/IR/PassManagerImpl.h:81:38
    #12 0xaaaabb30c670 in (anonymous namespace)::EmitAssemblyHelper::RunOptimizationPipeline(clang::BackendAction, std::__1::unique_ptr<llvm::raw_pwrite_stream, std::__1::default_delete<llvm::raw_pwrite_stream>>&, std::__1::unique_ptr<llvm::ToolOutputFile, std::__1::default_delete<llvm::ToolOutputFile>>&, clang::BackendConsumer*) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/lib/CodeGen/BackendUtil.cpp:1153:9
    #13 0xaaaabb2eef88 in EmitAssembly /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/lib/CodeGen/BackendUtil.cpp:1218:3
    #14 0xaaaabb2eef88 in 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::__1::unique_ptr<llvm::raw_pwrite_stream, std::__1::default_delete<llvm::raw_pwrite_stream>>, clang::BackendConsumer*) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/lib/CodeGen/BackendUtil.cpp:1382:13
    #15 0xaaaabb36d394 in clang::BackendConsumer::HandleTranslationUnit(clang::ASTContext&) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/lib/CodeGen/CodeGenAction.cpp:351:3
    #16 0xaaaac11d3f18 in clang::ParseAST(clang::Sema&, bool, bool) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/lib/Parse/ParseAST.cpp:184:13
    #17 0xaaaabc1d8144 in clang::FrontendAction::Execute() /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/lib/Frontend/FrontendAction.cpp:1077:8
    #18 0xaaaabc010f18 in clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/lib/Frontend/CompilerInstance.cpp:1062:33
    #19 0xaaaabc4cd9c8 in clang::ExecuteCompilerInvocation(clang::CompilerInstance*) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/lib/FrontendTool/ExecuteCompilerInvocation.cpp:296:25
    #20 0xaaaab0e217d4 in cc1_main(llvm::ArrayRef<char const*>, char const*, void*) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/tools/driver/cc1_main.cpp:286:15
    #21 0xaaaab0e19328 in ExecuteCC1Tool(llvm::SmallVectorImpl<char const*>&, llvm::ToolContext const&) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/tools/driver/driver.cpp:218:12
    #22 0xaaaab0e16044 in clang_main(int, char**, llvm::ToolContext const&) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/tools/driver/driver.cpp:259:12
    #23 0xaaaab0e483b0 in main /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build_msan_track_origins/tools/clang/tools/driver/clang-driver.cpp:17:10
    #24 0xfffff79884c0  (/lib/aarch64-linux-gnu/libc.so.6+0x284c0) (BuildId: 32fa4d6f3a8d5f430bdb7af2eb779470cd5ec7c2)
    #25 0xfffff7988594 in __libc_start_main (/lib/aarch64-linux-gnu/libc.so.6+0x28594) (BuildId: 32fa4d6f3a8d5f430bdb7af2eb779470cd5ec7c2)
    #26 0xaaaab0d7af6c in _start (/home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build_msan_track_origins/bin/clang-20+0x62daf6c)

  Member fields were destroyed
Step 16 (build stage3/msan build) failure: build stage3/msan build (failure)
...
[2/5319] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/AutoConvert.cpp.o
[3/5319] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/COM.cpp.o
[4/5319] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/BuryPointer.cpp.o
[5/5319] Building CXX object lib/Demangle/CMakeFiles/LLVMDemangle.dir/Demangle.cpp.o
[6/5319] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/DivisionByConstantInfo.cpp.o
[7/5319] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/ConvertUTF.cpp.o
[8/5319] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/ExtensibleRTTI.cpp.o
[9/5319] Building CXX object lib/Demangle/CMakeFiles/LLVMDemangle.dir/DLangDemangle.cpp.o
[10/5319] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/CrashRecoveryContext.cpp.o
[11/5319] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/DeltaTree.cpp.o
FAILED: lib/Support/CMakeFiles/LLVMSupport.dir/DeltaTree.cpp.o 
/home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build_msan/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/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build2_msan/lib/Support -I/home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/lib/Support -I/home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build2_msan/include -I/home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/include -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 -Wstring-conversion -Wmisleading-indentation -Wctad-maybe-unsupported -fdiagnostics-color -ffunction-sections -fdata-sections -Werror=global-constructors -O3 -DNDEBUG -std=c++17 -UNDEBUG  -fno-exceptions -funwind-tables -fno-rtti -MD -MT lib/Support/CMakeFiles/LLVMSupport.dir/DeltaTree.cpp.o -MF lib/Support/CMakeFiles/LLVMSupport.dir/DeltaTree.cpp.o.d -o lib/Support/CMakeFiles/LLVMSupport.dir/DeltaTree.cpp.o -c /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/lib/Support/DeltaTree.cpp
==2913193==WARNING: MemorySanitizer: use-of-uninitialized-value
    #0 0xaaaab9f871b0 in llvm::VPInstruction::generate(llvm::VPTransformState&) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/lib/Transforms/Vectorize/VPlanRecipes.cpp:636:7
    #1 0xaaaab9f87cb8 in llvm::VPInstruction::execute(llvm::VPTransformState&) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/lib/Transforms/Vectorize/VPlanRecipes.cpp:691:27
    #2 0xaaaab9f42654 in llvm::VPBasicBlock::executeRecipes(llvm::VPTransformState*, llvm::BasicBlock*) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/lib/Transforms/Vectorize/VPlan.cpp:535:12
    #3 0xaaaab9f41b9c in llvm::VPIRBasicBlock::execute(llvm::VPTransformState*) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/lib/Transforms/Vectorize/VPlan.cpp:463:3
    #4 0xaaaab9f504bc in llvm::VPlan::execute(llvm::VPTransformState*) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/lib/Transforms/Vectorize/VPlan.cpp:1033:12
    #5 0xaaaab9ebd730 in llvm::LoopVectorizationPlanner::executePlan(llvm::ElementCount, unsigned int, llvm::VPlan&, llvm::InnerLoopVectorizer&, llvm::DominatorTree*, bool, llvm::DenseMap<llvm::SCEV const*, llvm::Value*, llvm::DenseMapInfo<llvm::SCEV const*, void>, llvm::detail::DenseMapPair<llvm::SCEV const*, llvm::Value*>> const*) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp:7750:13
    #6 0xaaaab9eeb6a0 in llvm::LoopVectorizePass::processLoop(llvm::Loop*) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp:10281:11
    #7 0xaaaab9ef4b68 in llvm::LoopVectorizePass::runImpl(llvm::Function&) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp:10475:30
    #8 0xaaaab9ef5fbc in llvm::LoopVectorizePass::run(llvm::Function&, llvm::AnalysisManager<llvm::Function>&) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp:10512:32
    #9 0xaaaab5ca7d54 in llvm::PassManager<llvm::Function, llvm::AnalysisManager<llvm::Function>>::run(llvm::Function&, llvm::AnalysisManager<llvm::Function>&) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/include/llvm/IR/PassManagerImpl.h:81:38
    #10 0xaaaab5cb2b10 in llvm::ModuleToFunctionPassAdaptor::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/lib/IR/PassManager.cpp:124:38
    #11 0xaaaab5ca5638 in llvm::PassManager<llvm::Module, llvm::AnalysisManager<llvm::Module>>::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/include/llvm/IR/PassManagerImpl.h:81:38
    #12 0xaaaab7dffb50 in (anonymous namespace)::EmitAssemblyHelper::RunOptimizationPipeline(clang::BackendAction, std::__1::unique_ptr<llvm::raw_pwrite_stream, std::__1::default_delete<llvm::raw_pwrite_stream>>&, std::__1::unique_ptr<llvm::ToolOutputFile, std::__1::default_delete<llvm::ToolOutputFile>>&, clang::BackendConsumer*) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/lib/CodeGen/BackendUtil.cpp:1153:9
    #13 0xaaaab7dea1f8 in EmitAssembly /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/lib/CodeGen/BackendUtil.cpp:1218:3
    #14 0xaaaab7dea1f8 in 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::__1::unique_ptr<llvm::raw_pwrite_stream, std::__1::default_delete<llvm::raw_pwrite_stream>>, clang::BackendConsumer*) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/lib/CodeGen/BackendUtil.cpp:1382:13
    #15 0xaaaab7e4207c in clang::BackendConsumer::HandleTranslationUnit(clang::ASTContext&) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/lib/CodeGen/CodeGenAction.cpp:351:3
    #16 0xaaaabc0d7f7c in clang::ParseAST(clang::Sema&, bool, bool) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/lib/Parse/ParseAST.cpp:184:13
    #17 0xaaaab8869f94 in clang::FrontendAction::Execute() /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/lib/Frontend/FrontendAction.cpp:1077:8
    #18 0xaaaab872eb04 in clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/lib/Frontend/CompilerInstance.cpp:1062:33
    #19 0xaaaab8a875e0 in clang::ExecuteCompilerInvocation(clang::CompilerInstance*) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/lib/FrontendTool/ExecuteCompilerInvocation.cpp:296:25
    #20 0xaaaab0777038 in cc1_main(llvm::ArrayRef<char const*>, char const*, void*) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/tools/driver/cc1_main.cpp:286:15
    #21 0xaaaab0770d38 in ExecuteCC1Tool(llvm::SmallVectorImpl<char const*>&, llvm::ToolContext const&) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/tools/driver/driver.cpp:218:12
    #22 0xaaaab83b0a9c in operator() /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/include/llvm/ADT/STLFunctionalExtras.h:69:12
    #23 0xaaaab83b0a9c in operator() /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/lib/Driver/Job.cpp:437:34
    #24 0xaaaab83b0a9c in void llvm::function_ref<void ()>::callback_fn<clang::driver::CC1Command::Execute(llvm::ArrayRef<std::__1::optional<llvm::StringRef>>, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char>>*, bool*) const::$_0>(long) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/include/llvm/ADT/STLFunctionalExtras.h:46:12
    #25 0xaaaab6980f84 in operator() /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/include/llvm/ADT/STLFunctionalExtras.h:69:12
    #26 0xaaaab6980f84 in llvm::CrashRecoveryContext::RunSafely(llvm::function_ref<void ()>) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/lib/Support/CrashRecoveryContext.cpp:426:3
    #27 0xaaaab83aed68 in clang::driver::CC1Command::Execute(llvm::ArrayRef<std::__1::optional<llvm::StringRef>>, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char>>*, bool*) const /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/lib/Driver/Job.cpp:437:12
    #28 0xaaaab831d978 in clang::driver::Compilation::ExecuteCommand(clang::driver::Command const&, clang::driver::Command const*&, bool) const /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/lib/Driver/Compilation.cpp:196:15
    #29 0xaaaab831e1d8 in clang::driver::Compilation::ExecuteJobs(clang::driver::JobList const&, llvm::SmallVectorImpl<std::__1::pair<int, clang::driver::Command const*>>&, bool) const /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/lib/Driver/Compilation.cpp:250:19
    #30 0xaaaab835a550 in clang::driver::Driver::ExecuteCompilation(clang::driver::Compilation&, llvm::SmallVectorImpl<std::__1::pair<int, clang::driver::Command const*>>&) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/lib/Driver/Driver.cpp:1956:5
    #31 0xaaaab076f634 in clang_main(int, char**, llvm::ToolContext const&) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/tools/driver/driver.cpp:396:21
    #32 0xaaaab0792aa4 in main /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build_msan/tools/clang/tools/driver/clang-driver.cpp:17:10
    #33 0xfffff7a584c0  (/lib/aarch64-linux-gnu/libc.so.6+0x284c0) (BuildId: 32fa4d6f3a8d5f430bdb7af2eb779470cd5ec7c2)
    #34 0xfffff7a58594 in __libc_start_main (/lib/aarch64-linux-gnu/libc.so.6+0x28594) (BuildId: 32fa4d6f3a8d5f430bdb7af2eb779470cd5ec7c2)
    #35 0xaaaab06d44ec in _start (/home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build_msan/bin/clang-20+0x5c344ec)
Step 17 (stage3/msan check) failure: stage3/msan check (failure)
...
LC_ALL=C
JOURNAL_STREAM=8:4805
PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/snap/bin
BOT_DIR=/home/b
LIT_OPTS=--time-tests --timeout=900
_=/usr/bin/env
OLDPWD=/home/b/sanitizer-aarch64-linux-bootstrap-msan/build
[1/6195] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/MemAlloc.cpp.o
[2/6195] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/MathExtras.cpp.o
[3/6195] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/DeltaTree.cpp.o
FAILED: lib/Support/CMakeFiles/LLVMSupport.dir/DeltaTree.cpp.o 
/home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build_msan/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/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build2_msan/lib/Support -I/home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/lib/Support -I/home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build2_msan/include -I/home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/include -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 -Wstring-conversion -Wmisleading-indentation -Wctad-maybe-unsupported -fdiagnostics-color -ffunction-sections -fdata-sections -Werror=global-constructors -O3 -DNDEBUG -std=c++17 -UNDEBUG  -fno-exceptions -funwind-tables -fno-rtti -MD -MT lib/Support/CMakeFiles/LLVMSupport.dir/DeltaTree.cpp.o -MF lib/Support/CMakeFiles/LLVMSupport.dir/DeltaTree.cpp.o.d -o lib/Support/CMakeFiles/LLVMSupport.dir/DeltaTree.cpp.o -c /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/lib/Support/DeltaTree.cpp
==2915371==WARNING: MemorySanitizer: use-of-uninitialized-value
    #0 0xaaaab9f871b0 in llvm::VPInstruction::generate(llvm::VPTransformState&) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/lib/Transforms/Vectorize/VPlanRecipes.cpp:636:7
    #1 0xaaaab9f87cb8 in llvm::VPInstruction::execute(llvm::VPTransformState&) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/lib/Transforms/Vectorize/VPlanRecipes.cpp:691:27
    #2 0xaaaab9f42654 in llvm::VPBasicBlock::executeRecipes(llvm::VPTransformState*, llvm::BasicBlock*) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/lib/Transforms/Vectorize/VPlan.cpp:535:12
    #3 0xaaaab9f41b9c in llvm::VPIRBasicBlock::execute(llvm::VPTransformState*) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/lib/Transforms/Vectorize/VPlan.cpp:463:3
    #4 0xaaaab9f504bc in llvm::VPlan::execute(llvm::VPTransformState*) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/lib/Transforms/Vectorize/VPlan.cpp:1033:12
    #5 0xaaaab9ebd730 in llvm::LoopVectorizationPlanner::executePlan(llvm::ElementCount, unsigned int, llvm::VPlan&, llvm::InnerLoopVectorizer&, llvm::DominatorTree*, bool, llvm::DenseMap<llvm::SCEV const*, llvm::Value*, llvm::DenseMapInfo<llvm::SCEV const*, void>, llvm::detail::DenseMapPair<llvm::SCEV const*, llvm::Value*>> const*) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp:7750:13
    #6 0xaaaab9eeb6a0 in llvm::LoopVectorizePass::processLoop(llvm::Loop*) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp:10281:11
    #7 0xaaaab9ef4b68 in llvm::LoopVectorizePass::runImpl(llvm::Function&) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp:10475:30
    #8 0xaaaab9ef5fbc in llvm::LoopVectorizePass::run(llvm::Function&, llvm::AnalysisManager<llvm::Function>&) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp:10512:32
    #9 0xaaaab5ca7d54 in llvm::PassManager<llvm::Function, llvm::AnalysisManager<llvm::Function>>::run(llvm::Function&, llvm::AnalysisManager<llvm::Function>&) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/include/llvm/IR/PassManagerImpl.h:81:38
    #10 0xaaaab5cb2b10 in llvm::ModuleToFunctionPassAdaptor::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/lib/IR/PassManager.cpp:124:38
    #11 0xaaaab5ca5638 in llvm::PassManager<llvm::Module, llvm::AnalysisManager<llvm::Module>>::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/include/llvm/IR/PassManagerImpl.h:81:38
    #12 0xaaaab7dffb50 in (anonymous namespace)::EmitAssemblyHelper::RunOptimizationPipeline(clang::BackendAction, std::__1::unique_ptr<llvm::raw_pwrite_stream, std::__1::default_delete<llvm::raw_pwrite_stream>>&, std::__1::unique_ptr<llvm::ToolOutputFile, std::__1::default_delete<llvm::ToolOutputFile>>&, clang::BackendConsumer*) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/lib/CodeGen/BackendUtil.cpp:1153:9
    #13 0xaaaab7dea1f8 in EmitAssembly /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/lib/CodeGen/BackendUtil.cpp:1218:3
    #14 0xaaaab7dea1f8 in 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::__1::unique_ptr<llvm::raw_pwrite_stream, std::__1::default_delete<llvm::raw_pwrite_stream>>, clang::BackendConsumer*) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/lib/CodeGen/BackendUtil.cpp:1382:13
    #15 0xaaaab7e4207c in clang::BackendConsumer::HandleTranslationUnit(clang::ASTContext&) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/lib/CodeGen/CodeGenAction.cpp:351:3
    #16 0xaaaabc0d7f7c in clang::ParseAST(clang::Sema&, bool, bool) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/lib/Parse/ParseAST.cpp:184:13
    #17 0xaaaab8869f94 in clang::FrontendAction::Execute() /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/lib/Frontend/FrontendAction.cpp:1077:8
    #18 0xaaaab872eb04 in clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/lib/Frontend/CompilerInstance.cpp:1062:33
    #19 0xaaaab8a875e0 in clang::ExecuteCompilerInvocation(clang::CompilerInstance*) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/lib/FrontendTool/ExecuteCompilerInvocation.cpp:296:25
    #20 0xaaaab0777038 in cc1_main(llvm::ArrayRef<char const*>, char const*, void*) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/tools/driver/cc1_main.cpp:286:15
    #21 0xaaaab0770d38 in ExecuteCC1Tool(llvm::SmallVectorImpl<char const*>&, llvm::ToolContext const&) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/tools/driver/driver.cpp:218:12
    #22 0xaaaab83b0a9c in operator() /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/include/llvm/ADT/STLFunctionalExtras.h:69:12
    #23 0xaaaab83b0a9c in operator() /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/lib/Driver/Job.cpp:437:34
    #24 0xaaaab83b0a9c in void llvm::function_ref<void ()>::callback_fn<clang::driver::CC1Command::Execute(llvm::ArrayRef<std::__1::optional<llvm::StringRef>>, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char>>*, bool*) const::$_0>(long) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/include/llvm/ADT/STLFunctionalExtras.h:46:12
    #25 0xaaaab6980f84 in operator() /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/include/llvm/ADT/STLFunctionalExtras.h:69:12
    #26 0xaaaab6980f84 in llvm::CrashRecoveryContext::RunSafely(llvm::function_ref<void ()>) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/lib/Support/CrashRecoveryContext.cpp:426:3
    #27 0xaaaab83aed68 in clang::driver::CC1Command::Execute(llvm::ArrayRef<std::__1::optional<llvm::StringRef>>, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char>>*, bool*) const /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/lib/Driver/Job.cpp:437:12
    #28 0xaaaab831d978 in clang::driver::Compilation::ExecuteCommand(clang::driver::Command const&, clang::driver::Command const*&, bool) const /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/lib/Driver/Compilation.cpp:196:15
    #29 0xaaaab831e1d8 in clang::driver::Compilation::ExecuteJobs(clang::driver::JobList const&, llvm::SmallVectorImpl<std::__1::pair<int, clang::driver::Command const*>>&, bool) const /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/lib/Driver/Compilation.cpp:250:19
    #30 0xaaaab835a550 in clang::driver::Driver::ExecuteCompilation(clang::driver::Compilation&, llvm::SmallVectorImpl<std::__1::pair<int, clang::driver::Command const*>>&) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/lib/Driver/Driver.cpp:1956:5
    #31 0xaaaab076f634 in clang_main(int, char**, llvm::ToolContext const&) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/tools/driver/driver.cpp:396:21
    #32 0xaaaab0792aa4 in main /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build_msan/tools/clang/tools/driver/clang-driver.cpp:17:10
    #33 0xfffff7a584c0  (/lib/aarch64-linux-gnu/libc.so.6+0x284c0) (BuildId: 32fa4d6f3a8d5f430bdb7af2eb779470cd5ec7c2)
    #34 0xfffff7a58594 in __libc_start_main (/lib/aarch64-linux-gnu/libc.so.6+0x28594) (BuildId: 32fa4d6f3a8d5f430bdb7af2eb779470cd5ec7c2)
    #35 0xaaaab06d44ec in _start (/home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build_msan/bin/clang-20+0x5c344ec)
Step 20 (build stage3/msan_track_origins build) failure: build stage3/msan_track_origins build (failure)
...
[1/5319] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/ABIBreak.cpp.o
[2/5319] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/AutoConvert.cpp.o
[3/5319] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/COM.cpp.o
[4/5319] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/ConvertUTF.cpp.o
[5/5319] Building CXX object lib/Demangle/CMakeFiles/LLVMDemangle.dir/Demangle.cpp.o
[6/5319] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/DivisionByConstantInfo.cpp.o
[7/5319] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/BuryPointer.cpp.o
[8/5319] Building CXX object lib/Demangle/CMakeFiles/LLVMDemangle.dir/DLangDemangle.cpp.o
[9/5319] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/ExtensibleRTTI.cpp.o
[10/5319] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/DeltaTree.cpp.o
FAILED: lib/Support/CMakeFiles/LLVMSupport.dir/DeltaTree.cpp.o 
/home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build_msan_track_origins/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/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build2_msan_track_origins/lib/Support -I/home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/lib/Support -I/home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build2_msan_track_origins/include -I/home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/include -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 -Wstring-conversion -Wmisleading-indentation -Wctad-maybe-unsupported -fdiagnostics-color -ffunction-sections -fdata-sections -Werror=global-constructors -O3 -DNDEBUG -std=c++17 -UNDEBUG  -fno-exceptions -funwind-tables -fno-rtti -MD -MT lib/Support/CMakeFiles/LLVMSupport.dir/DeltaTree.cpp.o -MF lib/Support/CMakeFiles/LLVMSupport.dir/DeltaTree.cpp.o.d -o lib/Support/CMakeFiles/LLVMSupport.dir/DeltaTree.cpp.o -c /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/lib/Support/DeltaTree.cpp
==2925165==WARNING: MemorySanitizer: use-of-uninitialized-value
    #0 0xaaaabe39c7a8 in llvm::VPInstruction::generate(llvm::VPTransformState&) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/lib/Transforms/Vectorize/VPlanRecipes.cpp:636:7
    #1 0xaaaabe39ddc4 in llvm::VPInstruction::execute(llvm::VPTransformState&) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/lib/Transforms/Vectorize/VPlanRecipes.cpp:691:27
    #2 0xaaaabe339eb4 in llvm::VPBasicBlock::executeRecipes(llvm::VPTransformState*, llvm::BasicBlock*) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/lib/Transforms/Vectorize/VPlan.cpp:535:12
    #3 0xaaaabe339174 in llvm::VPIRBasicBlock::execute(llvm::VPTransformState*) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/lib/Transforms/Vectorize/VPlan.cpp:463:3
    #4 0xaaaabe34da30 in llvm::VPlan::execute(llvm::VPTransformState*) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/lib/Transforms/Vectorize/VPlan.cpp:1033:12
    #5 0xaaaabe27f92c in llvm::LoopVectorizationPlanner::executePlan(llvm::ElementCount, unsigned int, llvm::VPlan&, llvm::InnerLoopVectorizer&, llvm::DominatorTree*, bool, llvm::DenseMap<llvm::SCEV const*, llvm::Value*, llvm::DenseMapInfo<llvm::SCEV const*, void>, llvm::detail::DenseMapPair<llvm::SCEV const*, llvm::Value*>> const*) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp:7750:13
    #6 0xaaaabe2bcf60 in llvm::LoopVectorizePass::processLoop(llvm::Loop*) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp:10281:11
    #7 0xaaaabe2ca7a4 in llvm::LoopVectorizePass::runImpl(llvm::Function&) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp:10475:30
    #8 0xaaaabe2cc184 in llvm::LoopVectorizePass::run(llvm::Function&, llvm::AnalysisManager<llvm::Function>&) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp:10512:32
    #9 0xaaaab84f518c in llvm::PassManager<llvm::Function, llvm::AnalysisManager<llvm::Function>>::run(llvm::Function&, llvm::AnalysisManager<llvm::Function>&) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/include/llvm/IR/PassManagerImpl.h:81:38
    #10 0xaaaab8504824 in llvm::ModuleToFunctionPassAdaptor::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/lib/IR/PassManager.cpp:124:38
    #11 0xaaaab84f1bd0 in llvm::PassManager<llvm::Module, llvm::AnalysisManager<llvm::Module>>::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/include/llvm/IR/PassManagerImpl.h:81:38
    #12 0xaaaabb30c670 in (anonymous namespace)::EmitAssemblyHelper::RunOptimizationPipeline(clang::BackendAction, std::__1::unique_ptr<llvm::raw_pwrite_stream, std::__1::default_delete<llvm::raw_pwrite_stream>>&, std::__1::unique_ptr<llvm::ToolOutputFile, std::__1::default_delete<llvm::ToolOutputFile>>&, clang::BackendConsumer*) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/lib/CodeGen/BackendUtil.cpp:1153:9
    #13 0xaaaabb2eef88 in EmitAssembly /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/lib/CodeGen/BackendUtil.cpp:1218:3
    #14 0xaaaabb2eef88 in 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::__1::unique_ptr<llvm::raw_pwrite_stream, std::__1::default_delete<llvm::raw_pwrite_stream>>, clang::BackendConsumer*) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/lib/CodeGen/BackendUtil.cpp:1382:13
    #15 0xaaaabb36d394 in clang::BackendConsumer::HandleTranslationUnit(clang::ASTContext&) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/lib/CodeGen/CodeGenAction.cpp:351:3
    #16 0xaaaac11d3f18 in clang::ParseAST(clang::Sema&, bool, bool) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/lib/Parse/ParseAST.cpp:184:13
    #17 0xaaaabc1d8144 in clang::FrontendAction::Execute() /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/lib/Frontend/FrontendAction.cpp:1077:8
    #18 0xaaaabc010f18 in clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/lib/Frontend/CompilerInstance.cpp:1062:33
    #19 0xaaaabc4cd9c8 in clang::ExecuteCompilerInvocation(clang::CompilerInstance*) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/lib/FrontendTool/ExecuteCompilerInvocation.cpp:296:25
    #20 0xaaaab0e217d4 in cc1_main(llvm::ArrayRef<char const*>, char const*, void*) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/tools/driver/cc1_main.cpp:286:15
    #21 0xaaaab0e19328 in ExecuteCC1Tool(llvm::SmallVectorImpl<char const*>&, llvm::ToolContext const&) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/tools/driver/driver.cpp:218:12
    #22 0xaaaabbb47f4c in operator() /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/include/llvm/ADT/STLFunctionalExtras.h:69:12
    #23 0xaaaabbb47f4c in operator() /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/lib/Driver/Job.cpp:437:34
    #24 0xaaaabbb47f4c in void llvm::function_ref<void ()>::callback_fn<clang::driver::CC1Command::Execute(llvm::ArrayRef<std::__1::optional<llvm::StringRef>>, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char>>*, bool*) const::$_0>(long) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/include/llvm/ADT/STLFunctionalExtras.h:46:12
    #25 0xaaaab96d8604 in operator() /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/include/llvm/ADT/STLFunctionalExtras.h:69:12
    #26 0xaaaab96d8604 in llvm::CrashRecoveryContext::RunSafely(llvm::function_ref<void ()>) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/lib/Support/CrashRecoveryContext.cpp:426:3
    #27 0xaaaabbb454e8 in clang::driver::CC1Command::Execute(llvm::ArrayRef<std::__1::optional<llvm::StringRef>>, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char>>*, bool*) const /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/lib/Driver/Job.cpp:437:12
    #28 0xaaaabba7ac10 in clang::driver::Compilation::ExecuteCommand(clang::driver::Command const&, clang::driver::Command const*&, bool) const /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/lib/Driver/Compilation.cpp:196:15
    #29 0xaaaabba7b2c8 in clang::driver::Compilation::ExecuteJobs(clang::driver::JobList const&, llvm::SmallVectorImpl<std::__1::pair<int, clang::driver::Command const*>>&, bool) const /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/lib/Driver/Compilation.cpp:250:19
    #30 0xaaaabbacdf8c in clang::driver::Driver::ExecuteCompilation(clang::driver::Compilation&, llvm::SmallVectorImpl<std::__1::pair<int, clang::driver::Command const*>>&) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/lib/Driver/Driver.cpp:1956:5
    #31 0xaaaab0e1730c in clang_main(int, char**, llvm::ToolContext const&) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/tools/driver/driver.cpp:396:21
    #32 0xaaaab0e483b0 in main /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build_msan_track_origins/tools/clang/tools/driver/clang-driver.cpp:17:10
    #33 0xfffff79884c0  (/lib/aarch64-linux-gnu/libc.so.6+0x284c0) (BuildId: 32fa4d6f3a8d5f430bdb7af2eb779470cd5ec7c2)
    #34 0xfffff7988594 in __libc_start_main (/lib/aarch64-linux-gnu/libc.so.6+0x28594) (BuildId: 32fa4d6f3a8d5f430bdb7af2eb779470cd5ec7c2)
    #35 0xaaaab0d7af6c in _start (/home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build_msan_track_origins/bin/clang-20+0x62daf6c)
Step 21 (stage3/msan_track_origins check) failure: stage3/msan_track_origins check (failure)
...
LC_ALL=C
JOURNAL_STREAM=8:4805
PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/snap/bin
BOT_DIR=/home/b
LIT_OPTS=--time-tests --timeout=900
_=/usr/bin/env
OLDPWD=/home/b/sanitizer-aarch64-linux-bootstrap-msan/build
[1/6196] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/MemAlloc.cpp.o
[2/6196] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/MathExtras.cpp.o
[3/6196] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/DeltaTree.cpp.o
FAILED: lib/Support/CMakeFiles/LLVMSupport.dir/DeltaTree.cpp.o 
/home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build_msan_track_origins/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/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build2_msan_track_origins/lib/Support -I/home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/lib/Support -I/home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build2_msan_track_origins/include -I/home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/include -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 -Wstring-conversion -Wmisleading-indentation -Wctad-maybe-unsupported -fdiagnostics-color -ffunction-sections -fdata-sections -Werror=global-constructors -O3 -DNDEBUG -std=c++17 -UNDEBUG  -fno-exceptions -funwind-tables -fno-rtti -MD -MT lib/Support/CMakeFiles/LLVMSupport.dir/DeltaTree.cpp.o -MF lib/Support/CMakeFiles/LLVMSupport.dir/DeltaTree.cpp.o.d -o lib/Support/CMakeFiles/LLVMSupport.dir/DeltaTree.cpp.o -c /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/lib/Support/DeltaTree.cpp
==2942792==WARNING: MemorySanitizer: use-of-uninitialized-value
    #0 0xaaaabe39c7a8 in llvm::VPInstruction::generate(llvm::VPTransformState&) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/lib/Transforms/Vectorize/VPlanRecipes.cpp:636:7
    #1 0xaaaabe39ddc4 in llvm::VPInstruction::execute(llvm::VPTransformState&) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/lib/Transforms/Vectorize/VPlanRecipes.cpp:691:27
    #2 0xaaaabe339eb4 in llvm::VPBasicBlock::executeRecipes(llvm::VPTransformState*, llvm::BasicBlock*) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/lib/Transforms/Vectorize/VPlan.cpp:535:12
    #3 0xaaaabe339174 in llvm::VPIRBasicBlock::execute(llvm::VPTransformState*) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/lib/Transforms/Vectorize/VPlan.cpp:463:3
    #4 0xaaaabe34da30 in llvm::VPlan::execute(llvm::VPTransformState*) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/lib/Transforms/Vectorize/VPlan.cpp:1033:12
    #5 0xaaaabe27f92c in llvm::LoopVectorizationPlanner::executePlan(llvm::ElementCount, unsigned int, llvm::VPlan&, llvm::InnerLoopVectorizer&, llvm::DominatorTree*, bool, llvm::DenseMap<llvm::SCEV const*, llvm::Value*, llvm::DenseMapInfo<llvm::SCEV const*, void>, llvm::detail::DenseMapPair<llvm::SCEV const*, llvm::Value*>> const*) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp:7750:13
    #6 0xaaaabe2bcf60 in llvm::LoopVectorizePass::processLoop(llvm::Loop*) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp:10281:11
    #7 0xaaaabe2ca7a4 in llvm::LoopVectorizePass::runImpl(llvm::Function&) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp:10475:30
    #8 0xaaaabe2cc184 in llvm::LoopVectorizePass::run(llvm::Function&, llvm::AnalysisManager<llvm::Function>&) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp:10512:32
    #9 0xaaaab84f518c in llvm::PassManager<llvm::Function, llvm::AnalysisManager<llvm::Function>>::run(llvm::Function&, llvm::AnalysisManager<llvm::Function>&) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/include/llvm/IR/PassManagerImpl.h:81:38
    #10 0xaaaab8504824 in llvm::ModuleToFunctionPassAdaptor::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/lib/IR/PassManager.cpp:124:38
    #11 0xaaaab84f1bd0 in llvm::PassManager<llvm::Module, llvm::AnalysisManager<llvm::Module>>::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/include/llvm/IR/PassManagerImpl.h:81:38
    #12 0xaaaabb30c670 in (anonymous namespace)::EmitAssemblyHelper::RunOptimizationPipeline(clang::BackendAction, std::__1::unique_ptr<llvm::raw_pwrite_stream, std::__1::default_delete<llvm::raw_pwrite_stream>>&, std::__1::unique_ptr<llvm::ToolOutputFile, std::__1::default_delete<llvm::ToolOutputFile>>&, clang::BackendConsumer*) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/lib/CodeGen/BackendUtil.cpp:1153:9
    #13 0xaaaabb2eef88 in EmitAssembly /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/lib/CodeGen/BackendUtil.cpp:1218:3
    #14 0xaaaabb2eef88 in 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::__1::unique_ptr<llvm::raw_pwrite_stream, std::__1::default_delete<llvm::raw_pwrite_stream>>, clang::BackendConsumer*) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/lib/CodeGen/BackendUtil.cpp:1382:13
    #15 0xaaaabb36d394 in clang::BackendConsumer::HandleTranslationUnit(clang::ASTContext&) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/lib/CodeGen/CodeGenAction.cpp:351:3
    #16 0xaaaac11d3f18 in clang::ParseAST(clang::Sema&, bool, bool) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/lib/Parse/ParseAST.cpp:184:13
    #17 0xaaaabc1d8144 in clang::FrontendAction::Execute() /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/lib/Frontend/FrontendAction.cpp:1077:8
    #18 0xaaaabc010f18 in clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/lib/Frontend/CompilerInstance.cpp:1062:33
    #19 0xaaaabc4cd9c8 in clang::ExecuteCompilerInvocation(clang::CompilerInstance*) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/lib/FrontendTool/ExecuteCompilerInvocation.cpp:296:25
    #20 0xaaaab0e217d4 in cc1_main(llvm::ArrayRef<char const*>, char const*, void*) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/tools/driver/cc1_main.cpp:286:15
    #21 0xaaaab0e19328 in ExecuteCC1Tool(llvm::SmallVectorImpl<char const*>&, llvm::ToolContext const&) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/tools/driver/driver.cpp:218:12
    #22 0xaaaabbb47f4c in operator() /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/include/llvm/ADT/STLFunctionalExtras.h:69:12
    #23 0xaaaabbb47f4c in operator() /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/lib/Driver/Job.cpp:437:34
    #24 0xaaaabbb47f4c in void llvm::function_ref<void ()>::callback_fn<clang::driver::CC1Command::Execute(llvm::ArrayRef<std::__1::optional<llvm::StringRef>>, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char>>*, bool*) const::$_0>(long) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/include/llvm/ADT/STLFunctionalExtras.h:46:12
    #25 0xaaaab96d8604 in operator() /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/include/llvm/ADT/STLFunctionalExtras.h:69:12
    #26 0xaaaab96d8604 in llvm::CrashRecoveryContext::RunSafely(llvm::function_ref<void ()>) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/lib/Support/CrashRecoveryContext.cpp:426:3
    #27 0xaaaabbb454e8 in clang::driver::CC1Command::Execute(llvm::ArrayRef<std::__1::optional<llvm::StringRef>>, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char>>*, bool*) const /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/lib/Driver/Job.cpp:437:12
    #28 0xaaaabba7ac10 in clang::driver::Compilation::ExecuteCommand(clang::driver::Command const&, clang::driver::Command const*&, bool) const /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/lib/Driver/Compilation.cpp:196:15
    #29 0xaaaabba7b2c8 in clang::driver::Compilation::ExecuteJobs(clang::driver::JobList const&, llvm::SmallVectorImpl<std::__1::pair<int, clang::driver::Command const*>>&, bool) const /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/lib/Driver/Compilation.cpp:250:19
    #30 0xaaaabbacdf8c in clang::driver::Driver::ExecuteCompilation(clang::driver::Compilation&, llvm::SmallVectorImpl<std::__1::pair<int, clang::driver::Command const*>>&) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/lib/Driver/Driver.cpp:1956:5
    #31 0xaaaab0e1730c in clang_main(int, char**, llvm::ToolContext const&) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/tools/driver/driver.cpp:396:21
    #32 0xaaaab0e483b0 in main /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build_msan_track_origins/tools/clang/tools/driver/clang-driver.cpp:17:10
    #33 0xfffff79884c0  (/lib/aarch64-linux-gnu/libc.so.6+0x284c0) (BuildId: 32fa4d6f3a8d5f430bdb7af2eb779470cd5ec7c2)
    #34 0xfffff7988594 in __libc_start_main (/lib/aarch64-linux-gnu/libc.so.6+0x28594) (BuildId: 32fa4d6f3a8d5f430bdb7af2eb779470cd5ec7c2)
    #35 0xaaaab0d7af6c in _start (/home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build_msan_track_origins/bin/clang-20+0x62daf6c)

```

</details>

https://github.com/llvm/llvm-project/pull/110577