| Issue |
121897
|
| Summary |
[clang] Crash at -O3: Assertion `hasVectorValue(Def)' failed.
|
| Labels |
clang
|
| Assignees |
|
| Reporter |
cardigan1008
|
This code crashes at `-O3`:
```c
int *a;
int b, d;
static int f = 65535;
char c[];
int h(int i) {
int g = 1;
for (; b;)
if (a[0]) {
g = 0;
break;
}
if (g)
a;
else if (i)
return 1;
return 0;
}
void k() {
int *e[10] = {&f};
for (;;) {
d = 0;
for (; d < 8; d = f - 65535 + d + 1) {
int j = h(f);
c[j + f - 65534 + d] = 0;
}
}
}
void main() {}
```
Compiler Explorer: https://godbolt.org/z/rcGqsE196
Bisected to https://github.com/llvm/llvm-project/commit/f48884ded884d982a7fd13394b0e93e6588f4143, which was comitted by @fhahn
Crash:
```console
clang: /root/llvm-project/llvm/lib/Transforms/Vectorize/VPlan.cpp:236: llvm::Value* llvm::VPTransformState::get(llvm::VPValue*, const llvm::VPLane&): Assertion `hasVectorValue(Def)' failed.
```
Backtrace:
```console
Stack dump:
0. Program arguments: /opt/compiler-explorer/clang-assertions-trunk/bin/clang -gdwarf-4 -g -o /app/output.s -mllvm --x86-asm-syntax=intel -fno-verbose-asm -S --gcc-toolchain=/opt/compiler-explorer/gcc-snapshot -fcolor-diagnostics -fno-crash-diagnostics -O3 <source>
1. <eof> parser at end of file
2. Optimizer
3. Running pass "function<eager-inv>(float2int,lower-constant-intrinsics,chr,loop(loop-rotate<header-duplication;no-prepare-for-lto>,loop-deletion),loop-distribute,inject-tli-mappings,loop-vectorize<no-interleave-forced-only;no-vectorize-forced-only;>,infer-alignment,loop-load-elim,instcombine<max-iterations=1;no-verify-fixpoint>,simplifycfg<bonus-inst-threshold=1;forward-switch-cond;switch-range-to-icmp;switch-to-lookup;no-keep-loops;hoist-common-insts;no-hoist-loads-stores-with-cond-faulting;sink-common-insts;speculate-blocks;simplify-cond-branch;no-speculate-unpredictables>,slp-vectorizer,vector-combine,instcombine<max-iterations=1;no-verify-fixpoint>,loop-unroll<O3>,transform-warning,sroa<preserve-cfg>,infer-alignment,instcombine<max-iterations=1;no-verify-fixpoint>,loop-mssa(licm<allowspeculation>),alignment-from-assumptions,loop-sink,instsimplify,div-rem-pairs,tailcallelim,simplifycfg<bonus-inst-threshold=1;no-forward-switch-cond;switch-range-to-icmp;no-switch-to-lookup;keep-loops;no-hoist-common-insts;hoist-loads-stores-with-cond-faulting;no-sink-common-insts;speculate-blocks;simplify-cond-branch;speculate-unpredictables>)" on module "<source>"
4. Running pass "loop-vectorize<no-interleave-forced-only;no-vectorize-forced-only;>" on function "k"
#0 0x0000000003c71738 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x3c71738)
#1 0x0000000003c6f444 llvm::sys::CleanupOnSignal(unsigned long) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x3c6f444)
#2 0x0000000003bbc988 CrashRecoverySignalHandler(int) CrashRecoveryContext.cpp:0:0
#3 0x000077fbea242520 (/lib/x86_64-linux-gnu/libc.so.6+0x42520)
#4 0x000077fbea2969fc pthread_kill (/lib/x86_64-linux-gnu/libc.so.6+0x969fc)
#5 0x000077fbea242476 gsignal (/lib/x86_64-linux-gnu/libc.so.6+0x42476)
#6 0x000077fbea2287f3 abort (/lib/x86_64-linux-gnu/libc.so.6+0x287f3)
#7 0x000077fbea22871b (/lib/x86_64-linux-gnu/libc.so.6+0x2871b)
#8 0x000077fbea239e96 (/lib/x86_64-linux-gnu/libc.so.6+0x39e96)
#9 0x00000000058fd2be llvm::VPTransformState::get(llvm::VPValue*, llvm::VPLane const&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x58fd2be)
#10 0x0000000005790d0d llvm::InnerLoopVectorizer::scalarizeInstruction(llvm::Instruction const*, llvm::VPReplicateRecipe*, llvm::VPLane const&, llvm::VPTransformState&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x5790d0d)
#11 0x00000000057916d0 llvm::VPReplicateRecipe::execute(llvm::VPTransformState&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x57916d0)
#12 0x00000000058e3ce7 llvm::VPBasicBlock::executeRecipes(llvm::VPTransformState*, llvm::BasicBlock*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x58e3ce7)
#13 0x00000000058ef282 llvm::VPBasicBlock::execute(llvm::VPTransformState*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x58ef282)
#14 0x00000000058f0ef1 llvm::VPRegionBlock::execute(llvm::VPTransformState*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x58f0ef1)
#15 0x00000000058fddb1 llvm::VPlan::execute(llvm::VPTransformState*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x58fddb1)
#16 0x00000000057be1eb llvm::LoopVectorizationPlanner::executePlan(llvm::ElementCount, unsigned int, llvm::VPlan&, llvm::InnerLoopVectorizer&, llvm::DominatorTree*, bool, llvm::DenseMap<llvm::SCEV const*, llvm::Value*, llvm::DenseMapInfo<llvm::SCEV const*, void>, llvm::detail::DenseMapPair<llvm::SCEV const*, llvm::Value*>> const*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x57be1eb)
#17 0x00000000057d24c3 llvm::LoopVectorizePass::processLoop(llvm::Loop*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x57d24c3)
#18 0x00000000057d3e19 llvm::LoopVectorizePass::runImpl(llvm::Function&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x57d3e19)
#19 0x00000000057d4453 llvm::LoopVectorizePass::run(llvm::Function&, llvm::AnalysisManager<llvm::Function>&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x57d4453)
#20 0x00000000052f765e 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/clang+0x52f765e)
#21 0x000000000361c6e0 llvm::PassManager<llvm::Function, llvm::AnalysisManager<llvm::Function>>::run(llvm::Function&, llvm::AnalysisManager<llvm::Function>&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x361c6e0)
#22 0x00000000011305ce 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/clang+0x11305ce)
#23 0x000000000361affb llvm::ModuleToFunctionPassAdaptor::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x361affb)
#24 0x000000000112fc5e 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/clang+0x112fc5e)
#25 0x000000000361aa00 llvm::PassManager<llvm::Module, llvm::AnalysisManager<llvm::Module>>::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x361aa00)
#26 0x0000000003f247bf (anonymous namespace)::EmitAssemblyHelper::RunOptimizationPipeline(clang::BackendAction, std::unique_ptr<llvm::raw_pwrite_stream, std::default_delete<llvm::raw_pwrite_stream>>&, std::unique_ptr<llvm::ToolOutputFile, std::default_delete<llvm::ToolOutputFile>>&, clang::BackendConsumer*) BackendUtil.cpp:0:0
#27 0x0000000003f28335 clang::EmitBackendOutput(clang::DiagnosticsEngine&, clang::HeaderSearchOptions const&, clang::CodeGenOptions const&, clang::TargetOptions const&, clang::LangOptions const&, llvm::StringRef, llvm::Module*, clang::BackendAction, llvm::IntrusiveRefCntPtr<llvm::vfs::FileSystem>, std::unique_ptr<llvm::raw_pwrite_stream, std::default_delete<llvm::raw_pwrite_stream>>, clang::BackendConsumer*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x3f28335)
#28 0x000000000460209e clang::BackendConsumer::HandleTranslationUnit(clang::ASTContext&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x460209e)
#29 0x000000000660f9cc clang::ParseAST(clang::Sema&, bool, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x660f9cc)
#30 0x0000000004602478 clang::CodeGenAction::ExecuteAction() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x4602478)
#31 0x00000000048be799 clang::FrontendAction::Execute() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x48be799)
#32 0x0000000004840e2e clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x4840e2e)
#33 0x00000000049abb8e clang::ExecuteCompilerInvocation(clang::CompilerInstance*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x49abb8e)
#34 0x0000000000ce93ef cc1_main(llvm::ArrayRef<char const*>, char const*, void*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0xce93ef)
#35 0x0000000000ce0e8a ExecuteCC1Tool(llvm::SmallVectorImpl<char const*>&, llvm::ToolContext const&) driver.cpp:0:0
#36 0x0000000004647ae9 void llvm::function_ref<void ()>::callback_fn<clang::driver::CC1Command::Execute(llvm::ArrayRef<std::optional<llvm::StringRef>>, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char>>*, bool*) const::'lambda'()>(long) Job.cpp:0:0
#37 0x0000000003bbce34 llvm::CrashRecoveryContext::RunSafely(llvm::function_ref<void ()>) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x3bbce34)
#38 0x00000000046480df clang::driver::CC1Command::Execute(llvm::ArrayRef<std::optional<llvm::StringRef>>, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char>>*, bool*) const (.part.0) Job.cpp:0:0
#39 0x000000000460c1ed clang::driver::Compilation::ExecuteCommand(clang::driver::Command const&, clang::driver::Command const*&, bool) const (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x460c1ed)
#40 0x000000000460d26e clang::driver::Compilation::ExecuteJobs(clang::driver::JobList const&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*>>&, bool) const (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x460d26e)
#41 0x0000000004614d95 clang::driver::Driver::ExecuteCompilation(clang::driver::Compilation&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*>>&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x4614d95)
#42 0x0000000000ce6233 clang_main(int, char**, llvm::ToolContext const&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0xce6233)
#43 0x0000000000bb2524 main (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0xbb2524)
#44 0x000077fbea229d90 (/lib/x86_64-linux-gnu/libc.so.6+0x29d90)
#45 0x000077fbea229e40 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x29e40)
#46 0x0000000000ce0935 _start (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0xce0935)
```
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