| Issue |
179407
|
| Summary |
Assertion `Val && "isa<> used on a null pointer"' failed.
|
| Labels |
new issue
|
| Assignees |
|
| Reporter |
TatyanaDoubts
|
To reproduce run opt with the test below (-passes=loop-vectorize):
```
; 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(i64 %arg) #0 gc "statepoint-example" {
bb:
br label %bb1
bb1: ; preds = %bb1, %bb
%phi = phi i64 [ 0, %bb ], [ %add, %bb1 ]
%phi2 = phi i32 [ 0, %bb ], [ %or, %bb1 ]
%phi3 = phi i32 [ 0, %bb ], [ %select, %bb1 ]
%icmp = icmp eq i32 0, 0
%select = select i1 %icmp, i32 0, i32 %phi3
%or = or i32 %phi2, 0
%add = add i64 %phi, 1
%icmp4 = icmp ult i64 %phi, %arg
br i1 %icmp4, label %bb1, label %bb5
bb5: ; preds = %bb1
%phi6 = phi i32 [ %select, %bb1 ]
%phi7 = phi i32 [ %or, %bb1 ]
ret void
}
attributes #0 = { "target-features"="+prfchw,-cldemote,+avx,+aes,+sahf,+pclmul,-xop,+crc32,-amx-fp8,+xsaves,-avx512fp16,-usermsr,-sm4,-egpr,+sse4.1,-avx10.1,-avx512ifma,+xsave,+sse4.2,-tsxldtrk,-sm3,-ptwrite,-widekl,-movrs,+invpcid,+64bit,+xsavec,-avx512vpopcntdq,+cmov,-avx512vp2intersect,+avx512cd,+movbe,-avxvnniint8,-ccmp,-amx-int8,-kl,-sha512,-avxvnni,+rtm,+adx,+avx2,-hreset,-movdiri,-serialize,-vpclmulqdq,+avx512vl,-uintr,-cf,+clflushopt,-raoint,-cmpccxadd,+bmi,-amx-tile,+sse,-gfni,-avxvnniint16,-amx-fp16,-zu,-ndd,+xsaveopt,+rdrnd,+avx512f,-amx-bf16,-avx512bf16,-avx512vnni,-push2pop2,+cx8,+avx512bw,+sse3,+pku,-nf,-amx-tf32,-amx-avx512,+fsgsbase,-clzero,-mwaitx,-lwp,+lzcnt,-sha,-movdir64b,-ppx,-wbnoinvd,-enqcmd,-avxneconvert,-tbm,-pconfig,-amx-complex,+ssse3,+cx16,-avx10.2,+bmi2,+fma,+popcnt,-avxifma,+f16c,-avx512bitalg,-rdpru,+clwb,+mmx,+sse2,+rdseed,-avx512vbmi2,-prefetchi,-amx-movrs,-rdpid,-fma4,-avx512vbmi,-shstk,-vaes,-waitpkg,-sgx,+fxsr,+avx512dq,-sse4a,-avx512f" }
```
Reproducer: https://godbolt.org/z/Tq93jjPdz
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 "wombat"
#0 0x0000000005ae1818 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x5ae1818)
#1 0x0000000005ade6f4 SignalHandler(int, siginfo_t*, void*) Signals.cpp:0:0
#2 0x000074f27e242520 (/lib/x86_64-linux-gnu/libc.so.6+0x42520)
#3 0x000074f27e2969fc pthread_kill (/lib/x86_64-linux-gnu/libc.so.6+0x969fc)
#4 0x000074f27e242476 gsignal (/lib/x86_64-linux-gnu/libc.so.6+0x42476)
#5 0x000074f27e2287f3 abort (/lib/x86_64-linux-gnu/libc.so.6+0x287f3)
#6 0x000074f27e22871b (/lib/x86_64-linux-gnu/libc.so.6+0x2871b)
#7 0x000074f27e239e96 (/lib/x86_64-linux-gnu/libc.so.6+0x39e96)
#8 0x0000000003721ac3 (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x3721ac3)
#9 0x0000000003770db6 connectEpilogueVectorLoop(llvm::VPlan&, llvm::Loop*, llvm::EpilogueLoopVectorizationInfo&, llvm::DominatorTree*, llvm::LoopVectorizationLegality&, llvm::DenseMap<llvm::SCEV const*, llvm::Value*, llvm::DenseMapInfo<llvm::SCEV const*, void>, llvm::detail::DenseMapPair<llvm::SCEV const*, llvm::Value*>>&, (anonymous namespace)::GeneratedRTChecks&, llvm::ArrayRef<llvm::Instruction*>) LoopVectorize.cpp:0:0
#10 0x000000000377c300 llvm::LoopVectorizePass::processLoop(llvm::Loop*) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x377c300)
#11 0x000000000377d1e0 llvm::LoopVectorizePass::runImpl(llvm::Function&) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x377d1e0)
#12 0x000000000377d96d llvm::LoopVectorizePass::run(llvm::Function&, llvm::AnalysisManager<llvm::Function>&) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x377d96d)
#13 0x000000000305170e 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+0x305170e)
#14 0x00000000058521d1 llvm::PassManager<llvm::Function, llvm::AnalysisManager<llvm::Function>>::run(llvm::Function&, llvm::AnalysisManager<llvm::Function>&) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x58521d1)
#15 0x0000000000f0be3e 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+0xf0be3e)
#16 0x000000000585078a llvm::ModuleToFunctionPassAdaptor::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x585078a)
#17 0x000000000096703e 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+0x96703e)
#18 0x0000000005850141 llvm::PassManager<llvm::Module, llvm::AnalysisManager<llvm::Module>>::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x5850141)
#19 0x00000000009711fa 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+0x9711fa)
#20 0x00000000009652a8 optMain (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x9652a8)
#21 0x000074f27e229d90 (/lib/x86_64-linux-gnu/libc.so.6+0x29d90)
#22 0x000074f27e229e40 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x29e40)
#23 0x000000000095bf25 _start (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x95bf25)
Program terminated with signal: SIGSEGV
Compiler returned: 139
```
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