[SLPVectorizer] Assertion `(I->use_empty() || all_of(I->uses(), [&](Use &U) { return isDeleted( cast<Instruction>(U.getUser())); })) && "trying to erase instruction with users."' failed. #110787
Description
Reproducer: https://godbolt.org/z/b8cz56M9z
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"
define i32 @test(i1 %cond) {
entry:
br label %for.end14.i.i.i.us.i
for.end14.i.i.i.us.i:
%.promoted10921110.i.i.i.us.i = phi i32 [ %inc229.1.2.i.i.i.us.us.12.i, %for.end14.i.i.i.us.i ], [ 0, %entry ]
%.promoted1106.i.i.i.us.i = phi i32 [ %0, %for.end14.i.i.i.us.i ], [ 0, %entry ]
%g_276.promoted956960.i.i.i.us.i = phi i32 [ %4, %for.end14.i.i.i.us.i ], [ 0, %entry ]
%0 = or i32 1, 0
%inc229.1974.i.i.i.us.us.8.i = or i32 0, 0
%inc229.1974.i.i.i.us.us.9.i = or i32 0, 0
%inc229.1.2.i.i.i.us.us.9.i = or i32 %.promoted10921110.i.i.i.us.i, 0
%inc229.1974.i.i.i.us.us.12.i = or i32 %.promoted1106.i.i.i.us.i, 0
%inc229.1.2.i.i.i.us.us.12.i = or i32 1, 0
%1 = xor i32 %inc229.1.2.i.i.i.us.us.9.i, %inc229.1974.i.i.i.us.us.12.i
%2 = xor i32 %1, %inc229.1974.i.i.i.us.us.9.i
%3 = xor i32 %2, %inc229.1974.i.i.i.us.us.8.i
%4 = xor i32 %3, %inc229.1.2.i.i.i.us.us.12.i
br i1 %cond, label %exit, label %for.end14.i.i.i.us.i
exit:
ret i32 %4
}
opt: /root/llvm-project/llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp:2720: void llvm::slpvectorizer::BoUpSLP::removeInstructionsAndOperands(llvm::ArrayRef<U*>) [with T = llvm::Instruction]: Assertion `(I->use_empty() || all_of(I->uses(), [&](Use &U) { return isDeleted( cast<Instruction>(U.getUser())); })) && "trying to erase instruction with users."' failed.
PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace.
Stack dump:
0. Program arguments: /opt/compiler-explorer/clang-assertions-trunk/bin/opt -o /app/output.s -S -passes=slp-vectorizer <source>
1. Running pass "function(slp-vectorizer)" on module "<source>"
2. Running pass "slp-vectorizer" on function "test"
#0 0x000000000507e338 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x507e338)
#1 0x000000000507bcec SignalHandler(int) Signals.cpp:0:0
#2 0x00007f54a0842520 (/lib/x86_64-linux-gnu/libc.so.6+0x42520)
#3 0x00007f54a08969fc pthread_kill (/lib/x86_64-linux-gnu/libc.so.6+0x969fc)
#4 0x00007f54a0842476 gsignal (/lib/x86_64-linux-gnu/libc.so.6+0x42476)
#5 0x00007f54a08287f3 abort (/lib/x86_64-linux-gnu/libc.so.6+0x287f3)
#6 0x00007f54a082871b (/lib/x86_64-linux-gnu/libc.so.6+0x2871b)
#7 0x00007f54a0839e96 (/lib/x86_64-linux-gnu/libc.so.6+0x39e96)
#8 0x0000000004102d6f void llvm::slpvectorizer::BoUpSLP::removeInstructionsAndOperands<llvm::Instruction>(llvm::ArrayRef<llvm::Instruction*>) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x4102d6f)
#9 0x000000000415dea2 llvm::slpvectorizer::BoUpSLP::vectorizeTree(llvm::MapVector<llvm::Value*, llvm::SmallVector<llvm::Instruction*, 2u>, llvm::DenseMap<llvm::Value*, unsigned int, llvm::DenseMapInfo<llvm::Value*, void>, llvm::detail::DenseMapPair<llvm::Value*, unsigned int>>, llvm::SmallVector<std::pair<llvm::Value*, llvm::SmallVector<llvm::Instruction*, 2u>>, 0u>> const&, llvm::Instruction*) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x415dea2)
#10 0x0000000004167819 (anonymous namespace)::HorizontalReduction::tryToReduce(llvm::slpvectorizer::BoUpSLP&, llvm::DataLayout const&, llvm::TargetTransformInfo*, llvm::TargetLibraryInfo const&) SLPVectorizer.cpp:0:0
#11 0x000000000416a302 llvm::SLPVectorizerPass::vectorizeHorReduction(llvm::PHINode*, llvm::Instruction*, llvm::BasicBlock*, llvm::slpvectorizer::BoUpSLP&, llvm::TargetTransformInfo*, llvm::SmallVectorImpl<llvm::WeakTrackingVH>&) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x416a302)
#12 0x000000000416ebb8 llvm::SLPVectorizerPass::vectorizeRootInstruction(llvm::PHINode*, llvm::Instruction*, llvm::BasicBlock*, llvm::slpvectorizer::BoUpSLP&, llvm::TargetTransformInfo*) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x416ebb8)
#13 0x0000000004172da1 llvm::SLPVectorizerPass::vectorizeChainsInBlock(llvm::BasicBlock*, llvm::slpvectorizer::BoUpSLP&) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x4172da1)
#14 0x00000000041796b1 llvm::SLPVectorizerPass::runImpl(llvm::Function&, llvm::ScalarEvolution*, llvm::TargetTransformInfo*, llvm::TargetLibraryInfo*, llvm::AAResults*, llvm::LoopInfo*, llvm::DominatorTree*, llvm::AssumptionCache*, llvm::DemandedBits*, llvm::OptimizationRemarkEmitter*) (.part.0) SLPVectorizer.cpp:0:0
#15 0x000000000417a33b llvm::SLPVectorizerPass::run(llvm::Function&, llvm::AnalysisManager<llvm::Function>&) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x417a33b)
#16 0x0000000002f33c8e llvm::detail::PassModel<llvm::Function, llvm::SLPVectorizerPass, llvm::AnalysisManager<llvm::Function>>::run(llvm::Function&, llvm::AnalysisManager<llvm::Function>&) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x2f33c8e)
#17 0x0000000004e81158 llvm::PassManager<llvm::Function, llvm::AnalysisManager<llvm::Function>>::run(llvm::Function&, llvm::AnalysisManager<llvm::Function>&) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x4e81158)
#18 0x0000000000e15bde llvm::detail::PassModel<llvm::Function, llvm::PassManager<llvm::Function, llvm::AnalysisManager<llvm::Function>>, llvm::AnalysisManager<llvm::Function>>::run(llvm::Function&, llvm::AnalysisManager<llvm::Function>&) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0xe15bde)
#19 0x0000000004e7fb7e llvm::ModuleToFunctionPassAdaptor::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x4e7fb7e)
#20 0x0000000000e1538e llvm::detail::PassModel<llvm::Module, llvm::ModuleToFunctionPassAdaptor, llvm::AnalysisManager<llvm::Module>>::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0xe1538e)
#21 0x0000000004e7f5b0 llvm::PassManager<llvm::Module, llvm::AnalysisManager<llvm::Module>>::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x4e7f5b0)
#22 0x0000000000904102 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) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x904102)
#23 0x00000000008f6f8c optMain (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x8f6f8c)
#24 0x00007f54a0829d90 (/lib/x86_64-linux-gnu/libc.so.6+0x29d90)
#25 0x00007f54a0829e40 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x29e40)
#26 0x00000000008eea5e _start (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x8eea5e)
Program terminated with signal: SIGSEGV
Compiler returned: 139
llvm version: e379094