| Issue |
174599
|
| Summary |
Assertion `all_of(Bundles, [](const ScheduleBundle *Bundle) { return Bundle->isScheduled(); }) && "must be scheduled at this point"' failed.
|
| Labels |
llvm:SLPVectorizer,
crash-on-valid
|
| Assignees |
|
| Reporter |
gregbedwell
|
Not bisected yet, but a recent regression (at least in terms of the full C++ level test-case that the following is reduced from):
https://godbolt.org/z/qcMY4W9PP
```
define float @widget() {
bb:
%fadd = fadd float 0.000000e+00, 0.000000e+00
%load = load float, ptr null, align 4
%fadd1 = fadd float %fadd, %load
%fadd2 = fadd float 0.000000e+00, 0.000000e+00
%fmul = fmul float 0.000000e+00, 0.000000e+00
%fmul3 = fmul float 0.000000e+00, 0.000000e+00
%fadd4 = fadd float %fmul3, 0.000000e+00
br i1 false, label %bb5, label %bb6
bb5: ; preds = %bb
br label %bb8
bb6: ; preds = %bb
%fdiv = fdiv float %fadd1, 0.000000e+00
%fdiv7 = fdiv float %fadd2, 0.000000e+00
br label %bb8
bb8: ; preds = %bb6, %bb5
%phi = phi float [ 0.000000e+00, %bb5 ], [ %fdiv7, %bb6 ]
%phi9 = phi float [ %fmul, %bb5 ], [ 0.000000e+00, %bb6 ]
%phi10 = phi float [ %fadd4, %bb5 ], [ %load, %bb6 ]
%phi11 = phi float [ %fadd1, %bb5 ], [ %fdiv, %bb6 ]
ret float %phi11
}
```
```
opt: /root/llvm-project/llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp:22650: void llvm::slpvectorizer::BoUpSLP::scheduleBlock(const llvm::slpvectorizer::BoUpSLP&, llvm::slpvectorizer::BoUpSLP::BlockScheduling*): Assertion `all_of(Bundles, [](const ScheduleBundle *Bundle) { return Bundle->isScheduled(); }) && "must be scheduled at this point"' failed.
PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace and instructions to reproduce the bug.
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 "widget"
#0 0x0000000005a7a2e8 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x5a7a2e8)
#1 0x0000000005a77194 SignalHandler(int, siginfo_t*, void*) Signals.cpp:0:0
#2 0x000070bc0b842520 (/lib/x86_64-linux-gnu/libc.so.6+0x42520)
#3 0x000070bc0b8969fc pthread_kill (/lib/x86_64-linux-gnu/libc.so.6+0x969fc)
#4 0x000070bc0b842476 gsignal (/lib/x86_64-linux-gnu/libc.so.6+0x42476)
#5 0x000070bc0b8287f3 abort (/lib/x86_64-linux-gnu/libc.so.6+0x287f3)
#6 0x000070bc0b82871b (/lib/x86_64-linux-gnu/libc.so.6+0x2871b)
#7 0x000070bc0b839e96 (/lib/x86_64-linux-gnu/libc.so.6+0x39e96)
#8 0x000000000380c32a llvm::slpvectorizer::BoUpSLP::scheduleBlock(llvm::slpvectorizer::BoUpSLP const&, llvm::slpvectorizer::BoUpSLP::BlockScheduling*) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x380c32a)
#9 0x000000000386090a llvm::slpvectorizer::BoUpSLP::vectorizeTree(llvm::SmallDenseSet<llvm::Value*, 4u, llvm::DenseMapInfo<llvm::Value*, void>> const&, llvm::Instruction*, llvm::ArrayRef<std::tuple<llvm::Value*, unsigned int, bool>>) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x386090a)
#10 0x0000000003864e34 llvm::slpvectorizer::BoUpSLP::vectorizeTree() (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x3864e34)
#11 0x0000000003885b24 llvm::SLPVectorizerPass::tryToVectorizeList(llvm::ArrayRef<llvm::Value*>, llvm::slpvectorizer::BoUpSLP&, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x3885b24)
#12 0x000000000388a41c bool tryToVectorizeSequence<llvm::Value>(llvm::SmallVectorImpl<llvm::Value*>&, llvm::function_ref<bool (llvm::Value*, llvm::Value*)>, llvm::function_ref<bool (llvm::ArrayRef<llvm::Value*>, llvm::Value*)>, llvm::function_ref<bool (llvm::ArrayRef<llvm::Value*>, bool)>, bool, llvm::slpvectorizer::BoUpSLP&) (.constprop.0) SLPVectorizer.cpp:0:0
#13 0x000000000388b6ac llvm::SLPVectorizerPass::vectorizeChainsInBlock(llvm::BasicBlock*, llvm::slpvectorizer::BoUpSLP&) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x388b6ac)
#14 0x00000000038935b6 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 0x00000000038941cb llvm::SLPVectorizerPass::run(llvm::Function&, llvm::AnalysisManager<llvm::Function>&) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x38941cb)
#16 0x000000000304051e 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+0x304051e)
#17 0x0000000005854c81 llvm::PassManager<llvm::Function, llvm::AnalysisManager<llvm::Function>>::run(llvm::Function&, llvm::AnalysisManager<llvm::Function>&) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x5854c81)
#18 0x0000000000f1b1de 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+0xf1b1de)
#19 0x000000000585323a llvm::ModuleToFunctionPassAdaptor::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x585323a)
#20 0x000000000097edfe 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+0x97edfe)
#21 0x0000000005852bf1 llvm::PassManager<llvm::Module, llvm::AnalysisManager<llvm::Module>>::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x5852bf1)
#22 0x00000000009890b0 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, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x9890b0)
#23 0x000000000097cfd8 optMain (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x97cfd8)
#24 0x000070bc0b829d90 (/lib/x86_64-linux-gnu/libc.so.6+0x29d90)
#25 0x000070bc0b829e40 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x29e40)
#26 0x00000000009739d5 _start (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x9739d5)
Program terminated with signal: SIGSEGV
Compiler returned: 139
```
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