[llvm] [SandboxVec] Add a simple pack reuse pass (PR #141848)

Wed Jun 4 14:20:33 PDT 2025

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `llvm-clang-x86_64-expensive-checks-ubuntu` running on `as-builder-4` while building `llvm` at step 7 "test-check-all".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/187/builds/6532

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

```
Step 7 (test-check-all) failure: Test just built components: check-all completed (failure)
******************** TEST 'LLVM :: Transforms/SandboxVectorizer/pack_reuse_basic.ll' FAILED ********************
Exit Code: 2

Command Output (stderr):
--
/home/buildbot/worker/as-builder-4/ramdisk/expensive-checks/build/bin/opt -passes=sandbox-vectorizer -sbvec-vec-reg-bits=1024 -sbvec-passes="regions-from-metadata<pack-reuse>" /home/buildbot/worker/as-builder-4/ramdisk/expensive-checks/llvm-project/llvm/test/Transforms/SandboxVectorizer/pack_reuse_basic.ll -S | /home/buildbot/worker/as-builder-4/ramdisk/expensive-checks/build/bin/FileCheck /home/buildbot/worker/as-builder-4/ramdisk/expensive-checks/llvm-project/llvm/test/Transforms/SandboxVectorizer/pack_reuse_basic.ll # RUN: at line 2
+ /home/buildbot/worker/as-builder-4/ramdisk/expensive-checks/build/bin/FileCheck /home/buildbot/worker/as-builder-4/ramdisk/expensive-checks/llvm-project/llvm/test/Transforms/SandboxVectorizer/pack_reuse_basic.ll
+ /home/buildbot/worker/as-builder-4/ramdisk/expensive-checks/build/bin/opt -passes=sandbox-vectorizer -sbvec-vec-reg-bits=1024 '-sbvec-passes=regions-from-metadata<pack-reuse>' /home/buildbot/worker/as-builder-4/ramdisk/expensive-checks/llvm-project/llvm/test/Transforms/SandboxVectorizer/pack_reuse_basic.ll -S
LLVM ERROR: Function @pack_reuse changed by SandboxVectorizerPass without invalidating analyses
PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace.
Stack dump:
0.	Program arguments: /home/buildbot/worker/as-builder-4/ramdisk/expensive-checks/build/bin/opt -passes=sandbox-vectorizer -sbvec-vec-reg-bits=1024 -sbvec-passes=regions-from-metadata<pack-reuse> /home/buildbot/worker/as-builder-4/ramdisk/expensive-checks/llvm-project/llvm/test/Transforms/SandboxVectorizer/pack_reuse_basic.ll -S
1.	Running pass "function(sandbox-vectorizer)" on module "/home/buildbot/worker/as-builder-4/ramdisk/expensive-checks/llvm-project/llvm/test/Transforms/SandboxVectorizer/pack_reuse_basic.ll"
2.	Running pass "sandbox-vectorizer" on function "pack_reuse"
 #0 0x00005598dc1ee288 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/home/buildbot/worker/as-builder-4/ramdisk/expensive-checks/build/bin/opt+0x4732288)
 #1 0x00005598dc1ebd2e llvm::sys::RunSignalHandlers() (/home/buildbot/worker/as-builder-4/ramdisk/expensive-checks/build/bin/opt+0x472fd2e)
 #2 0x00005598dc1eeaf1 SignalHandler(int, siginfo_t*, void*) Signals.cpp:0:0
 #3 0x00007fc0d1b89520 (/lib/x86_64-linux-gnu/libc.so.6+0x42520)
 #4 0x00007fc0d1bdd9fc pthread_kill (/lib/x86_64-linux-gnu/libc.so.6+0x969fc)
 #5 0x00007fc0d1b89476 gsignal (/lib/x86_64-linux-gnu/libc.so.6+0x42476)
 #6 0x00007fc0d1b6f7f3 abort (/lib/x86_64-linux-gnu/libc.so.6+0x287f3)
 #7 0x00005598dc1d59e4 llvm::report_fatal_error(llvm::Twine const&, bool) (/home/buildbot/worker/as-builder-4/ramdisk/expensive-checks/build/bin/opt+0x47199e4)
 #8 0x00005598dd624d95 void llvm::detail::UniqueFunctionBase<void, llvm::StringRef, llvm::Any, llvm::PreservedAnalyses const&>::CallImpl<llvm::PreservedCFGCheckerInstrumentation::registerCallbacks(llvm::PassInstrumentationCallbacks&, llvm::AnalysisManager<llvm::Module>&)::$_2>(void*, llvm::StringRef, llvm::Any&, llvm::PreservedAnalyses const&) StandardInstrumentations.cpp:0:0
 #9 0x00005598dc3d25e8 llvm::PassManager<llvm::Function, llvm::AnalysisManager<llvm::Function>>::run(llvm::Function&, llvm::AnalysisManager<llvm::Function>&) (/home/buildbot/worker/as-builder-4/ramdisk/expensive-checks/build/bin/opt+0x49165e8)
#10 0x00005598dd66e7ed llvm::detail::PassModel<llvm::Function, llvm::PassManager<llvm::Function, llvm::AnalysisManager<llvm::Function>>, llvm::AnalysisManager<llvm::Function>>::run(llvm::Function&, llvm::AnalysisManager<llvm::Function>&) PassBuilderPipelines.cpp:0:0
#11 0x00005598dc3d6ec7 llvm::ModuleToFunctionPassAdaptor::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (/home/buildbot/worker/as-builder-4/ramdisk/expensive-checks/build/bin/opt+0x491aec7)
#12 0x00005598dd66a87d llvm::detail::PassModel<llvm::Module, llvm::ModuleToFunctionPassAdaptor, llvm::AnalysisManager<llvm::Module>>::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) PassBuilderPipelines.cpp:0:0
#13 0x00005598dc3d122a llvm::PassManager<llvm::Module, llvm::AnalysisManager<llvm::Module>>::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (/home/buildbot/worker/as-builder-4/ramdisk/expensive-checks/build/bin/opt+0x491522a)
#14 0x00005598dd5f9004 llvm::runPassPipeline(llvm::StringRef, llvm::Module&, llvm::TargetMachine*, llvm::TargetLibraryInfoImpl*, llvm::ToolOutputFile*, llvm::ToolOutputFile*, llvm::ToolOutputFile*, llvm::StringRef, llvm::ArrayRef<llvm::PassPlugin>, llvm::ArrayRef<std::function<void (llvm::PassBuilder&)>>, llvm::opt_tool::OutputKind, llvm::opt_tool::VerifierKind, bool, bool, bool, bool, bool, bool, bool) (/home/buildbot/worker/as-builder-4/ramdisk/expensive-checks/build/bin/opt+0x5b3d004)
#15 0x00005598dc1b3aeb optMain (/home/buildbot/worker/as-builder-4/ramdisk/expensive-checks/build/bin/opt+0x46f7aeb)
#16 0x00007fc0d1b70d90 (/lib/x86_64-linux-gnu/libc.so.6+0x29d90)
#17 0x00007fc0d1b70e40 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x29e40)
#18 0x00005598dc1ad1e5 _start (/home/buildbot/worker/as-builder-4/ramdisk/expensive-checks/build/bin/opt+0x46f11e5)
FileCheck error: '<stdin>' is empty.
FileCheck command line:  /home/buildbot/worker/as-builder-4/ramdisk/expensive-checks/build/bin/FileCheck /home/buildbot/worker/as-builder-4/ramdisk/expensive-checks/llvm-project/llvm/test/Transforms/SandboxVectorizer/pack_reuse_basic.ll

--

********************

```

</details>

https://github.com/llvm/llvm-project/pull/141848