[llvm] [DSE] Apply initializes attribute to DSE (PR #107282)

Wed Oct 23 23:29:12 PDT 2024

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 6 "test-build-unified-tree-check-all".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/187/builds/2087

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

```
Step 6 (test-build-unified-tree-check-all) failure: test (failure)
******************** TEST 'LLVM :: Analysis/BasicAA/modref.ll' FAILED ********************
Exit Code: 2

Command Output (stderr):
--
RUN: at line 2: /home/buildbot/worker/as-builder-4/ramdisk/expensive-checks/build/bin/opt < /home/buildbot/worker/as-builder-4/ramdisk/expensive-checks/llvm-project/llvm/test/Analysis/BasicAA/modref.ll -aa-pipeline=basic-aa -passes=gvn,dse -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/Analysis/BasicAA/modref.ll
+ /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/Analysis/BasicAA/modref.ll
+ /home/buildbot/worker/as-builder-4/ramdisk/expensive-checks/build/bin/opt -aa-pipeline=basic-aa -passes=gvn,dse -S
LLVM ERROR: Function @test2a changed by DSEPass 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 -aa-pipeline=basic-aa -passes=gvn,dse -S
1.	Running pass "function(gvn<>,dse)" on module "<stdin>"
2.	Running pass "dse" on function "test2a"
 #0 0x000056266bf05268 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) /home/buildbot/worker/as-builder-4/ramdisk/expensive-checks/llvm-project/llvm/lib/Support/Unix/Signals.inc:723:22
 #1 0x000056266bf05689 PrintStackTraceSignalHandler(void*) /home/buildbot/worker/as-builder-4/ramdisk/expensive-checks/llvm-project/llvm/lib/Support/Unix/Signals.inc:798:1
 #2 0x000056266bf02ad9 llvm::sys::RunSignalHandlers() /home/buildbot/worker/as-builder-4/ramdisk/expensive-checks/llvm-project/llvm/lib/Support/Signals.cpp:105:20
 #3 0x000056266bf04b00 SignalHandler(int) /home/buildbot/worker/as-builder-4/ramdisk/expensive-checks/llvm-project/llvm/lib/Support/Unix/Signals.inc:413:1
 #4 0x00007f57e2a9b520 (/lib/x86_64-linux-gnu/libc.so.6+0x42520)
 #5 0x00007f57e2aef9fc pthread_kill (/lib/x86_64-linux-gnu/libc.so.6+0x969fc)
 #6 0x00007f57e2a9b476 gsignal (/lib/x86_64-linux-gnu/libc.so.6+0x42476)
 #7 0x00007f57e2a817f3 abort (/lib/x86_64-linux-gnu/libc.so.6+0x287f3)
 #8 0x000056266be15743 llvm::report_fatal_error(llvm::Twine const&, bool) /home/buildbot/worker/as-builder-4/ramdisk/expensive-checks/llvm-project/llvm/lib/Support/ErrorHandling.cpp:126:9
 #9 0x0000562668ec9cf1 llvm::PreservedCFGCheckerInstrumentation::registerCallbacks(llvm::PassInstrumentationCallbacks&, llvm::AnalysisManager<llvm::Module>&)::'lambda1'(llvm::StringRef, llvm::Any, llvm::PreservedAnalyses const&)::operator()(llvm::StringRef, llvm::Any, llvm::PreservedAnalyses const&) const /home/buildbot/worker/as-builder-4/ramdisk/expensive-checks/llvm-project/llvm/lib/Passes/StandardInstrumentations.cpp:1444:63
#10 0x0000562668edee37 void llvm::detail::UniqueFunctionBase<void, llvm::StringRef, llvm::Any, llvm::PreservedAnalyses const&>::CallImpl<llvm::PreservedCFGCheckerInstrumentation::registerCallbacks(llvm::PassInstrumentationCallbacks&, llvm::AnalysisManager<llvm::Module>&)::'lambda1'(llvm::StringRef, llvm::Any, llvm::PreservedAnalyses const&)>(void*, llvm::StringRef, llvm::Any&, llvm::PreservedAnalyses const&) /home/buildbot/worker/as-builder-4/ramdisk/expensive-checks/llvm-project/llvm/include/llvm/ADT/FunctionExtras.h:222:16
#11 0x000056266929a85d llvm::unique_function<void (llvm::StringRef, llvm::Any, llvm::PreservedAnalyses const&)>::operator()(llvm::StringRef, llvm::Any, llvm::PreservedAnalyses const&) /home/buildbot/worker/as-builder-4/ramdisk/expensive-checks/llvm-project/llvm/include/llvm/ADT/FunctionExtras.h:387:62
#12 0x000056266aceb38c void llvm::PassInstrumentation::runAfterPass<llvm::Function, llvm::detail::PassConcept<llvm::Function, llvm::AnalysisManager<llvm::Function>>>(llvm::detail::PassConcept<llvm::Function, llvm::AnalysisManager<llvm::Function>> const&, llvm::Function const&, llvm::PreservedAnalyses const&) const /home/buildbot/worker/as-builder-4/ramdisk/expensive-checks/llvm-project/llvm/include/llvm/IR/PassInstrumentation.h:273:30
#13 0x000056266bc2aafc llvm::PassManager<llvm::Function, llvm::AnalysisManager<llvm::Function>>::run(llvm::Function&, llvm::AnalysisManager<llvm::Function>&) /home/buildbot/worker/as-builder-4/ramdisk/expensive-checks/llvm-project/llvm/include/llvm/IR/PassManagerImpl.h:93:27
#14 0x00005626664fc67d llvm::detail::PassModel<llvm::Function, llvm::PassManager<llvm::Function, llvm::AnalysisManager<llvm::Function>>, llvm::AnalysisManager<llvm::Function>>::run(llvm::Function&, llvm::AnalysisManager<llvm::Function>&) /home/buildbot/worker/as-builder-4/ramdisk/expensive-checks/llvm-project/llvm/include/llvm/IR/PassManagerInternal.h:91:3
#15 0x000056266bc29abe llvm::ModuleToFunctionPassAdaptor::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) /home/buildbot/worker/as-builder-4/ramdisk/expensive-checks/llvm-project/llvm/lib/IR/PassManager.cpp:129:23
#16 0x00005626664fc5ad llvm::detail::PassModel<llvm::Module, llvm::ModuleToFunctionPassAdaptor, llvm::AnalysisManager<llvm::Module>>::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) /home/buildbot/worker/as-builder-4/ramdisk/expensive-checks/llvm-project/llvm/include/llvm/IR/PassManagerInternal.h:91:3
#17 0x000056266bc2a6df llvm::PassManager<llvm::Module, llvm::AnalysisManager<llvm::Module>>::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) /home/buildbot/worker/as-builder-4/ramdisk/expensive-checks/llvm-project/llvm/include/llvm/IR/PassManagerImpl.h:85:18
#18 0x0000562665bb947e 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/llvm-project/llvm/tools/opt/NewPMDriver.cpp:541:10
#19 0x0000562665b89de3 optMain /home/buildbot/worker/as-builder-4/ramdisk/expensive-checks/llvm-project/llvm/tools/opt/optdriver.cpp:739:27
#20 0x0000562665b875c1 main /home/buildbot/worker/as-builder-4/ramdisk/expensive-checks/llvm-project/llvm/tools/opt/opt.cpp:25:64
#21 0x00007f57e2a82d90 (/lib/x86_64-linux-gnu/libc.so.6+0x29d90)
#22 0x00007f57e2a82e40 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x29e40)
#23 0x0000562665b874a5 _start (/home/buildbot/worker/as-builder-4/ramdisk/expensive-checks/build/bin/opt+0xcf34a5)
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/Analysis/BasicAA/modref.ll

--

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

```

</details>

https://github.com/llvm/llvm-project/pull/107282