| Issue |
175229
|
| Summary |
[LoopVectorizePass] Assertion `detail::isPresent(Val) && "dyn_cast on a non-existent value"' failed.
|
| Labels |
vectorizers,
crash-on-valid
|
| Assignees |
|
| Reporter |
gregbedwell
|
Very recent regression. Not bisected yet.
https://godbolt.org/z/eMaroco7z
```
target triple = "x86_64-unknown-unknown"
define i1 @_Z1nv(i8 %0) {
entry:
br label %for.body4
for.cond.cleanup.loopexit: ; preds = %for.body4
ret i1 %tobool8
for.body4: ; preds = %for.body4, %entry
%h.028 = phi i1 [ %tobool8, %for.body4 ], [ false, %entry ]
%i.027 = phi i8 [ %inc, %for.body4 ], [ 0, %entry ]
%tobool8 = or i1 %h.028, true
%inc = add i8 %i.027, 1
%exitcond.not = icmp eq i8 %i.027, %0
br i1 %exitcond.not, label %for.cond.cleanup.loopexit, label %for.body4
; uselistorder directives
uselistorder i1 %tobool8, { 1, 0 }
}
```
```
opt: /root/llvm-project/llvm/include/llvm/Support/Casting.h:656: decltype(auto) llvm::dyn_cast(From*) [with To = llvm::VPInstruction; From = llvm::VPRecipeBase]: Assertion `detail::isPresent(Val) && "dyn_cast on a non-existent value"' 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=loop-vectorize <source>
1. Running pass "function(loop-vectorize<no-interleave-forced-only;no-vectorize-forced-only;>)" on module "<source>"
2. Running pass "loop-vectorize<no-interleave-forced-only;no-vectorize-forced-only;>" on function "_Z1nv"
#0 0x0000000005a74d58 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x5a74d58)
#1 0x0000000005a71c04 SignalHandler(int, siginfo_t*, void*) Signals.cpp:0:0
#2 0x00007def0e042520 (/lib/x86_64-linux-gnu/libc.so.6+0x42520)
#3 0x00007def0e0969fc pthread_kill (/lib/x86_64-linux-gnu/libc.so.6+0x969fc)
#4 0x00007def0e042476 gsignal (/lib/x86_64-linux-gnu/libc.so.6+0x42476)
#5 0x00007def0e0287f3 abort (/lib/x86_64-linux-gnu/libc.so.6+0x287f3)
#6 0x00007def0e02871b (/lib/x86_64-linux-gnu/libc.so.6+0x2871b)
#7 0x00007def0e039e96 (/lib/x86_64-linux-gnu/libc.so.6+0x39e96)
#8 0x00000000037526f4 preparePlanForEpilogueVectorLoop(llvm::VPlan&, llvm::Loop*, llvm::DenseMap<llvm::SCEV const*, llvm::Value*, llvm::DenseMapInfo<llvm::SCEV const*, void>, llvm::detail::DenseMapPair<llvm::SCEV const*, llvm::Value*>> const&, llvm::EpilogueLoopVectorizationInfo&, llvm::LoopVectorizationCostModel&, llvm::ScalarEvolution&) LoopVectorize.cpp:0:0
#9 0x000000000375aefa llvm::LoopVectorizePass::processLoop(llvm::Loop*) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x375aefa)
#10 0x000000000375bd20 llvm::LoopVectorizePass::runImpl(llvm::Function&) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x375bd20)
#11 0x000000000375c4ad llvm::LoopVectorizePass::run(llvm::Function&, llvm::AnalysisManager<llvm::Function>&) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x375c4ad)
#12 0x000000000303396e llvm::detail::PassModel<llvm::Function, llvm::LoopVectorizePass, llvm::AnalysisManager<llvm::Function>>::run(llvm::Function&, llvm::AnalysisManager<llvm::Function>&) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x303396e)
#13 0x000000000584ee81 llvm::PassManager<llvm::Function, llvm::AnalysisManager<llvm::Function>>::run(llvm::Function&, llvm::AnalysisManager<llvm::Function>&) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x584ee81)
#14 0x0000000000f1e11e 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+0xf1e11e)
#15 0x000000000584d43a llvm::ModuleToFunctionPassAdaptor::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x584d43a)
#16 0x000000000097f47e 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+0x97f47e)
#17 0x000000000584cdf1 llvm::PassManager<llvm::Module, llvm::AnalysisManager<llvm::Module>>::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x584cdf1)
#18 0x0000000000989730 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+0x989730)
#19 0x000000000097d658 optMain (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x97d658)
#20 0x00007def0e029d90 (/lib/x86_64-linux-gnu/libc.so.6+0x29d90)
#21 0x00007def0e029e40 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x29e40)
#22 0x0000000000974055 _start (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x974055)
Program terminated with signal: SIGSEGV
Compiler returned: 139
```
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