| Issue |
89614
|
| Summary |
Assertion `(E->ReorderIndices.empty() || E != VectorizableTree.front().get() || !E->UserTreeIndices.empty()) && "PHI reordering is free."' failed.
|
| Labels |
new issue
|
| Assignees |
|
| Reporter |
TatyanaDoubts
|
To reproduce run the following test with -passes slp-vectorizer
```
; ModuleID = './reduced.ll'
source_filename = "./reduced.ll"
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-ni:1-p2:32:8:8:32-ni:2"
target triple = "x86_64-unknown-linux-gnu"
define void @wombat() #0 gc "statepoint-example" {
bb:
br label %bb1
bb1: ; preds = %bb1, %bb
%phi = phi i32 [ 0, %bb ], [ %mul33, %bb1 ]
%phi2 = phi i32 [ 0, %bb ], [ %phi3, %bb1 ]
%phi3 = phi i32 [ 0, %bb ], [ %phi2, %bb1 ]
%mul = mul i32 %phi2, %phi2
%mul4 = mul i32 %phi3, %mul
%mul5 = mul i32 %phi2, %mul4
%mul6 = mul i32 %phi3, %mul5
%mul7 = mul i32 %phi2, %mul6
%mul8 = mul i32 %phi3, %mul7
%mul9 = mul i32 %phi2, %mul8
%mul10 = mul i32 %phi3, %mul9
%mul11 = mul i32 %phi2, %mul10
%mul12 = mul i32 %phi3, %mul11
%mul13 = mul i32 %phi2, %mul12
%mul14 = mul i32 %phi3, %mul13
%mul15 = mul i32 %phi2, %mul14
%mul16 = mul i32 %phi3, %mul15
%mul17 = mul i32 %phi2, %mul16
%mul18 = mul i32 %phi3, %mul17
%mul19 = mul i32 %phi2, %mul18
%mul20 = mul i32 %phi3, %mul19
%mul21 = mul i32 %phi2, %mul20
%mul22 = mul i32 %phi3, %mul21
%mul23 = mul i32 %phi2, %mul22
%mul24 = mul i32 %phi3, %mul23
%mul25 = mul i32 %phi2, %mul24
%mul26 = mul i32 %phi3, %mul25
%mul27 = mul i32 %phi2, %mul26
%mul28 = mul i32 %phi3, %mul27
%mul29 = mul i32 %phi2, %mul28
%mul30 = mul i32 %phi3, %mul29
%mul31 = mul i32 %phi2, %mul30
%mul32 = mul i32 %phi3, %mul31
%mul33 = mul i32 %phi2, %mul32
br label %bb1
}
attributes #0 = { "target-cpu"="znver2" }
```
Reproducer:
https://godbolt.org/z/3eMYddMG1
Stack dump:
```
0. Program arguments: /opt/compiler-explorer/clang-assertions-trunk/bin/opt -o /app/output.s -S -passes slp-vectorizer <source>
#0 0x0000000004d1fff8 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x4d1fff8)
#1 0x0000000004d1d74c SignalHandler(int) Signals.cpp:0:0
#2 0x00007f1d81642520 (/lib/x86_64-linux-gnu/libc.so.6+0x42520)
#3 0x00007f1d816969fc pthread_kill (/lib/x86_64-linux-gnu/libc.so.6+0x969fc)
#4 0x00007f1d81642476 gsignal (/lib/x86_64-linux-gnu/libc.so.6+0x42476)
#5 0x00007f1d816287f3 abort (/lib/x86_64-linux-gnu/libc.so.6+0x287f3)
#6 0x00007f1d8162871b (/lib/x86_64-linux-gnu/libc.so.6+0x2871b)
#7 0x00007f1d81639e96 (/lib/x86_64-linux-gnu/libc.so.6+0x39e96)
#8 0x0000000003e89276 llvm::slpvectorizer::BoUpSLP::vectorizeTree(llvm::slpvectorizer::BoUpSLP::TreeEntry*, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x3e89276)
#9 0x0000000003ea9b51 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::SmallVectorImpl<std::pair<llvm::Value*, llvm::Value*>>&, llvm::Instruction*) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x3ea9b51)
#10 0x0000000003eb651d (anonymous namespace)::HorizontalReduction::tryToReduce(llvm::slpvectorizer::BoUpSLP&, llvm::DataLayout const&, llvm::TargetTransformInfo*, llvm::TargetLibraryInfo const&) SLPVectorizer.cpp:0:0
#11 0x0000000003eb8824 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+0x3eb8824)
#12 0x0000000003ebcdd8 llvm::SLPVectorizerPass::vectorizeRootInstruction(llvm::PHINode*, llvm::Instruction*, llvm::BasicBlock*, llvm::slpvectorizer::BoUpSLP&, llvm::TargetTransformInfo*) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x3ebcdd8)
#13 0x0000000003ec0132 llvm::SLPVectorizerPass::vectorizeChainsInBlock(llvm::BasicBlock*, llvm::slpvectorizer::BoUpSLP&) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x3ec0132)
#14 0x0000000003ec3987 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 0x0000000003ec4463 llvm::SLPVectorizerPass::run(llvm::Function&, llvm::AnalysisManager<llvm::Function>&) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x3ec4463)
#16 0x0000000002d7003e 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+0x2d7003e)
#17 0x0000000000db61f4 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+0xdb61f4)
#18 0x0000000004b305ae llvm::ModuleToFunctionPassAdaptor::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x4b305ae)
#19 0x0000000000d9a89e 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+0xd9a89e)
#20 0x0000000004b2e4bc llvm::PassManager<llvm::Module, llvm::AnalysisManager<llvm::Module>>::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x4b2e4bc)
#21 0x00000000008c8eb2 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+0x8c8eb2)
#22 0x00000000008bc705 optMain (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x8bc705)
#23 0x00007f1d81629d90 (/lib/x86_64-linux-gnu/libc.so.6+0x29d90)
#24 0x00007f1d81629e40 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x29e40)
#25 0x00000000008b34ae _start (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x8b34ae)
Program terminated with signal: SIGSEGV
Compiler returned: 139
```
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