| Issue |
126250
|
| Summary |
[SLPVectorizer] Assertion `idx < size()' failed.
|
| Labels |
new issue
|
| Assignees |
|
| Reporter |
TatyanaDoubts
|
To reproduce run opt with the test below, -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 = %bb13, %bb13, %bb4, %bb
%phi = phi i32 [ 0, %bb ], [ %phi6, %bb4 ], [ %or, %bb13 ], [ %or, %bb13 ]
%phi2 = phi i32 [ 0, %bb ], [ %phi7, %bb4 ], [ %or14, %bb13 ], [ %or14, %bb13 ]
%phi3 = phi i32 [ 0, %bb ], [ 0, %bb4 ], [ 0, %bb13 ], [ 0, %bb13 ]
br i1 false, label %bb4, label %bb15
bb4: ; preds = %bb15, %bb1
%phi5 = phi i32 [ poison, %bb1 ], [ %add, %bb15 ]
%phi6 = phi i32 [ poison, %bb1 ], [ %add16, %bb15 ]
%phi7 = phi i32 [ poison, %bb1 ], [ %add17, %bb15 ]
%phi8 = phi i32 [ poison, %bb1 ], [ %add18, %bb15 ]
%phi9 = phi i32 [ poison, %bb1 ], [ %add19, %bb15 ]
%phi10 = phi i32 [ %phi, %bb1 ], [ %add16, %bb15 ]
%phi11 = phi i32 [ %phi2, %bb1 ], [ %add17, %bb15 ]
%phi12 = phi i32 [ %phi3, %bb1 ], [ %add, %bb15 ]
br i1 false, label %bb13, label %bb1
bb13: ; preds = %bb4
%or = or i32 %phi10, 0
%or14 = or i32 %phi11, 0
br i1 false, label %bb1, label %bb1
bb15: ; preds = %bb1
%add = add i32 0, 0
%add16 = add i32 0, 0
%add17 = add i32 0, 0
%add18 = add i32 0, 0
%add19 = add i32 0, 0
br label %bb4
}
attributes #0 = { "target-cpu"="skylake-avx512" }
```
Reproducer: https://godbolt.org/z/aKf3EaePe
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 "wombat"
#0 0x00000000054de1c8 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x54de1c8)
#1 0x00000000054dbb84 SignalHandler(int) Signals.cpp:0:0
#2 0x00007e530ca42520 (/lib/x86_64-linux-gnu/libc.so.6+0x42520)
#3 0x00007e530ca969fc pthread_kill (/lib/x86_64-linux-gnu/libc.so.6+0x969fc)
#4 0x00007e530ca42476 gsignal (/lib/x86_64-linux-gnu/libc.so.6+0x42476)
#5 0x00007e530ca287f3 abort (/lib/x86_64-linux-gnu/libc.so.6+0x287f3)
#6 0x00007e530ca2871b (/lib/x86_64-linux-gnu/libc.so.6+0x2871b)
#7 0x00007e530ca39e96 (/lib/x86_64-linux-gnu/libc.so.6+0x39e96)
#8 0x000000000451f3e4 llvm::InstructionCost llvm::slpvectorizer::BoUpSLP::processBuildVector<llvm::slpvectorizer::BoUpSLP::ShuffleCostEstimator, llvm::InstructionCost, llvm::TargetTransformInfo, llvm::ArrayRef<llvm::Value*>, llvm::slpvectorizer::BoUpSLP, llvm::SmallPtrSetImpl<llvm::Value*>>(llvm::slpvectorizer::BoUpSLP::TreeEntry const*, llvm::Type*, llvm::TargetTransformInfo&, llvm::ArrayRef<llvm::Value*>&, llvm::slpvectorizer::BoUpSLP&, llvm::SmallPtrSetImpl<llvm::Value*>&) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x451f3e4)
#9 0x0000000004526e77 llvm::slpvectorizer::BoUpSLP::getEntryCost(llvm::slpvectorizer::BoUpSLP::TreeEntry const*, llvm::ArrayRef<llvm::Value*>, llvm::SmallPtrSetImpl<llvm::Value*>&) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x4526e77)
#10 0x0000000004559e79 llvm::slpvectorizer::BoUpSLP::getTreeCost(llvm::ArrayRef<llvm::Value*>) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x4559e79)
#11 0x00000000045637c3 llvm::SLPVectorizerPass::tryToVectorizeList(llvm::ArrayRef<llvm::Value*>, llvm::slpvectorizer::BoUpSLP&, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x45637c3)
#12 0x00000000045688fd bool tryToVectorizeSequence<llvm::Value>(llvm::SmallVectorImpl<llvm::Value*>&, llvm::function_ref<bool (llvm::Value*, llvm::Value*)>, llvm::function_ref<bool (llvm::Value*, llvm::Value*)>, llvm::function_ref<bool (llvm::ArrayRef<llvm::Value*>, bool)>, bool, llvm::slpvectorizer::BoUpSLP&) (.constprop.0) SLPVectorizer.cpp:0:0
#13 0x000000000456a2d5 llvm::SLPVectorizerPass::vectorizeChainsInBlock(llvm::BasicBlock*, llvm::slpvectorizer::BoUpSLP&) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x456a2d5)
#14 0x0000000004572266 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 0x0000000004572dbb llvm::SLPVectorizerPass::run(llvm::Function&, llvm::AnalysisManager<llvm::Function>&) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x4572dbb)
#16 0x00000000031cfd2e 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+0x31cfd2e)
#17 0x00000000052d9bb0 llvm::PassManager<llvm::Function, llvm::AnalysisManager<llvm::Function>>::run(llvm::Function&, llvm::AnalysisManager<llvm::Function>&) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x52d9bb0)
#18 0x0000000000e9740e 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+0xe9740e)
#19 0x00000000052d84cb llvm::ModuleToFunctionPassAdaptor::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x52d84cb)
#20 0x0000000000e968be 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+0xe968be)
#21 0x00000000052d7ed0 llvm::PassManager<llvm::Module, llvm::AnalysisManager<llvm::Module>>::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x52d7ed0)
#22 0x000000000095ff6a 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+0x95ff6a)
#23 0x000000000095248c optMain (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x95248c)
#24 0x00007e530ca29d90 (/lib/x86_64-linux-gnu/libc.so.6+0x29d90)
#25 0x00007e530ca29e40 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x29e40)
#26 0x0000000000949d65 _start (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x949d65)
Program terminated with signal: SIGSEGV
Compiler returned: 139
```
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