| Issue |
109376
|
| Summary |
[SLPVectorizer] Assertion `Iter != this->end() && "DenseMap::at failed due to a missing key"' failed.
|
| Labels |
llvm:SLPVectorizer,
crash-on-valid
|
| Assignees |
|
| Reporter |
dtcxzyw
|
Reproducer: https://godbolt.org/z/v5bqhPWqb
```
; bin/opt -passes=slp-vectorizer reduced.ll -S
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 i16 @test() {
entry:
%sub.i487.i.reass.i = add i16 0, 0
%sub.i487.i.reass.40.i = add i16 %sub.i487.i.reass.i, 0
%sub.i487.i.reass.41.i = add i16 %sub.i487.i.reass.i, 0
%sub.i487.i.reass.42.i = add i16 %sub.i487.i.reass.i, 0
%sub.i487.i.reass.43.i = add i16 %sub.i487.i.reass.i, 0
%sub.i487.i.reass.44.i = add i16 %sub.i487.i.reass.i, 0
%sub.i487.i.reass.45.i = add i16 %sub.i487.i.reass.i, 0
%sub.i487.i.reass.46.i = add i16 0, 0
%sub.i487.i.reass.47.i = add i16 0, 0
%sub.i487.i.reass.48.i = add i16 0, 0
%sub.i487.i.reass.49.i = add i16 0, 0
%or374461.i.40.i = or i16 %sub.i487.i.reass.40.i, %sub.i487.i.reass.41.i
%or374461.i.41.i = or i16 %or374461.i.40.i, %sub.i487.i.reass.42.i
%or374461.i.42.i = or i16 %or374461.i.41.i, %sub.i487.i.reass.43.i
%or374461.i.43.i = or i16 %or374461.i.42.i, %sub.i487.i.reass.44.i
%or374461.i.44.i = or i16 %or374461.i.43.i, %sub.i487.i.reass.45.i
%or374461.i.45.i = or i16 %or374461.i.44.i, %sub.i487.i.reass.46.i
%or374461.i.46.i = or i16 %or374461.i.45.i, %sub.i487.i.reass.47.i
%or374461.i.47.i = or i16 %or374461.i.46.i, %sub.i487.i.reass.48.i
%or374461.i.48.i = or i16 %or374461.i.47.i, %sub.i487.i.reass.49.i
%or374461.i.50.i = or i16 %or374461.i.48.i, %sub.i487.i.reass.i
%sub.i487.i96.reass.i = add i16 0, 0
%sub.i487.i96.reass.16.i = add i16 %sub.i487.i96.reass.i, 0
%sub.i487.i96.reass.17.i = add i16 %sub.i487.i96.reass.i, 0
%0 = or i16 %sub.i487.i96.reass.16.i, %sub.i487.i96.reass.17.i
%1 = or i16 %0, %or374461.i.50.i
ret i16 %1
}
```
```
opt: /root/llvm-project/llvm/include/llvm/ADT/DenseMap.h:204: const ValueT& llvm::DenseMapBase<DerivedT, KeyT, ValueT, KeyInfoT, BucketT>::at(llvm::DenseMapBase<DerivedT, KeyT, ValueT, KeyInfoT, BucketT>::const_arg_type_t<KeyT>) const [with DerivedT = llvm::DenseMap<llvm::Value*, llvm::Value*>; KeyT = llvm::Value*; ValueT = llvm::Value*; KeyInfoT = llvm::DenseMapInfo<llvm::Value*, void>; BucketT = llvm::detail::DenseMapPair<llvm::Value*, llvm::Value*>; llvm::DenseMapBase<DerivedT, KeyT, ValueT, KeyInfoT, BucketT>::const_arg_type_t<KeyT> = const llvm::Value*]: Assertion `Iter != this->end() && "DenseMap::at failed due to a missing key"' 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 0x0000000005035d68 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x5035d68)
#1 0x00000000050334ac SignalHandler(int) Signals.cpp:0:0
#2 0x0000707bdcc42520 (/lib/x86_64-linux-gnu/libc.so.6+0x42520)
#3 0x0000707bdcc969fc pthread_kill (/lib/x86_64-linux-gnu/libc.so.6+0x969fc)
#4 0x0000707bdcc42476 gsignal (/lib/x86_64-linux-gnu/libc.so.6+0x42476)
#5 0x0000707bdcc287f3 abort (/lib/x86_64-linux-gnu/libc.so.6+0x287f3)
#6 0x0000707bdcc2871b (/lib/x86_64-linux-gnu/libc.so.6+0x2871b)
#7 0x0000707bdcc39e96 (/lib/x86_64-linux-gnu/libc.so.6+0x39e96)
#8 0x000000000409326e llvm::DenseMapBase<llvm::DenseMap<llvm::Value*, llvm::Value*, llvm::DenseMapInfo<llvm::Value*, void>, llvm::detail::DenseMapPair<llvm::Value*, llvm::Value*>>, llvm::Value*, llvm::Value*, llvm::DenseMapInfo<llvm::Value*, void>, llvm::detail::DenseMapPair<llvm::Value*, llvm::Value*>>::at(llvm::Value const*) const (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x409326e)
#9 0x000000000413473f (anonymous namespace)::HorizontalReduction::tryToReduce(llvm::slpvectorizer::BoUpSLP&, llvm::DataLayout const&, llvm::TargetTransformInfo*, llvm::TargetLibraryInfo const&) SLPVectorizer.cpp:0:0
#10 0x00000000041370d1 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+0x41370d1)
#11 0x000000000413b996 llvm::SLPVectorizerPass::vectorizeRootInstruction(llvm::PHINode*, llvm::Instruction*, llvm::BasicBlock*, llvm::slpvectorizer::BoUpSLP&, llvm::TargetTransformInfo*) (.constprop.0) SLPVectorizer.cpp:0:0
#12 0x000000000413ff36 llvm::SLPVectorizerPass::vectorizeChainsInBlock(llvm::BasicBlock*, llvm::slpvectorizer::BoUpSLP&) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x413ff36)
#13 0x0000000004146401 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
#14 0x000000000414708b llvm::SLPVectorizerPass::run(llvm::Function&, llvm::AnalysisManager<llvm::Function>&) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x414708b)
#15 0x0000000002f1a1ae 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+0x2f1a1ae)
#16 0x0000000004e38158 llvm::PassManager<llvm::Function, llvm::AnalysisManager<llvm::Function>>::run(llvm::Function&, llvm::AnalysisManager<llvm::Function>&) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x4e38158)
#17 0x0000000000e0b02e 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+0xe0b02e)
#18 0x0000000004e36b7e llvm::ModuleToFunctionPassAdaptor::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x4e36b7e)
#19 0x0000000000e0a83e 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+0xe0a83e)
#20 0x0000000004e365b0 llvm::PassManager<llvm::Module, llvm::AnalysisManager<llvm::Module>>::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x4e365b0)
#21 0x00000000008feef2 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+0x8feef2)
#22 0x00000000008f1d7c optMain (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x8f1d7c)
#23 0x0000707bdcc29d90 (/lib/x86_64-linux-gnu/libc.so.6+0x29d90)
#24 0x0000707bdcc29e40 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x29e40)
#25 0x00000000008e984e _start (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x8e984e)
Program terminated with signal: SIGSEGV
Compiler returned: 139
```
llvm version: e8a739062490ce1bb30974f216ba187cd7b5a2a4
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