Clang-9.0 crashed for Enoki build

[llvmbot]

Bugzilla Link	46221
Version	9.0
OS	Linux
Attachments	preprocessed source(s) and associated run script(s)
Reporter	LLVM Bugzilla Contributor
CC	@zygoloid

Extended Description

[llvmbot]

https://github.com/mitsuba-renderer/enoki

[llvmbot]

21db4940c90823040fe114ff584115edc4e4c1ac

[llvmbot]

Commit: 21db4940c90823040fe114ff584115edc4e4c1ac

[Endilll]

That was the most difficult reduction so far.
Appears to be fixed in Clang 11.
Reduced by me and C-Reduce:

using __m512  = __attribute__((__vector_size__(64))) int;
using __m512f = __attribute__((__vector_size__(64))) float;

struct S{};

void operator==(__m512, S);

void load() {
  alignas(__m512) int mem[32];
  for (int i = 0; i < 32; ++i)
    mem[i] = 1;
  
  __m512 m{1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1};

  __m512 a{
    __builtin_ia32_loadaps512_mask(
      (__m512f *)mem,
      {},
      __builtin_ia32_cmpd512_mask({}, m, 0, -1)
    )
  };
  a == S{};
}

Clang 10 with assertions crash:

clang: /root/llvm-project/llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp:969:
void {anonymous}::SelectionDAGLegalize::LegalizeOp(llvm::SDNode*):
Assertion `TLI.getTypeAction(*DAG.getContext(), Node->getValueType(i)) == TargetLowering::TypeLegal && "Unexpected illegal type!"' failed.

Stack dump:
0.      Program arguments: /opt/compiler-explorer/clang-assertions-10.0.0/bin/clang -cc1 -triple x86_64-pc-linux-gnu -emit-obj -target-cpu knl -O3 -std=c++17 -x c++ pp.ii 
1.      <eof> parser at end of file
2.      Code generation
3.      Running pass 'Function Pass Manager' on module 'pp.ii'.
4.      Running pass 'X86 DAG->DAG Instruction Selection' on function '@_Z4loadv'
 #0 0x00000000028dbd3a llvm::sys::PrintStackTrace(llvm::raw_ostream&) (/opt/compiler-explorer/clang-assertions-10.0.0/bin/clang+0x28dbd3a)
 #1 0x00000000028d9af4 llvm::sys::RunSignalHandlers() (/opt/compiler-explorer/clang-assertions-10.0.0/bin/clang+0x28d9af4)
 #2 0x00000000028d9c28 SignalHandler(int) (/opt/compiler-explorer/clang-assertions-10.0.0/bin/clang+0x28d9c28)
 #3 0x00007f16a3c5a510 (/lib/x86_64-linux-gnu/libc.so.6+0x3c510)
 #4 0x00007f16a3ca80fc (/lib/x86_64-linux-gnu/libc.so.6+0x8a0fc)
 #5 0x00007f16a3c5a472 raise ../sysdeps/posix/raise.c:27:6
 #6 0x00007f16a3c444b2 abort (/lib/x86_64-linux-gnu/libc.so.6+0x264b2)
 #7 0x00007f16a3c443d5 (/lib/x86_64-linux-gnu/libc.so.6+0x263d5)
 #8 0x00007f16a3c533a2 (/lib/x86_64-linux-gnu/libc.so.6+0x353a2)
 #9 0x0000000003587f93 (anonymous namespace)::SelectionDAGLegalize::LegalizeOp(llvm::SDNode*) (.part.0) (/opt/compiler-explorer/clang-assertions-10.0.0/bin/clang+0x3587f93)
#10 0x0000000003599619 llvm::SelectionDAG::LegalizeOp(llvm::SDNode*, llvm::SmallSetVector<llvm::SDNode*, 16u>&) (/opt/compiler-explorer/clang-assertions-10.0.0/bin/clang+0x3599619)
#11 0x000000000355a06b llvm::SelectionDAG::Combine(llvm::CombineLevel, llvm::AAResults*, llvm::CodeGenOpt::Level) (/opt/compiler-explorer/clang-assertions-10.0.0/bin/clang+0x355a06b)
#12 0x00000000036489e9 llvm::SelectionDAGISel::CodeGenAndEmitDAG() (/opt/compiler-explorer/clang-assertions-10.0.0/bin/clang+0x36489e9)
#13 0x000000000364e2b8 llvm::SelectionDAGISel::SelectAllBasicBlocks(llvm::Function const&) (/opt/compiler-explorer/clang-assertions-10.0.0/bin/clang+0x364e2b8)
#14 0x0000000003650418 llvm::SelectionDAGISel::runOnMachineFunction(llvm::MachineFunction&) (.part.0) (/opt/compiler-explorer/clang-assertions-10.0.0/bin/clang+0x3650418)
#15 0x00000000017e3013 (anonymous namespace)::X86DAGToDAGISel::runOnMachineFunction(llvm::MachineFunction&) (/opt/compiler-explorer/clang-assertions-10.0.0/bin/clang+0x17e3013)
#16 0x0000000001df3989 llvm::MachineFunctionPass::runOnFunction(llvm::Function&) (/opt/compiler-explorer/clang-assertions-10.0.0/bin/clang+0x1df3989)
#17 0x00000000021cb54a llvm::FPPassManager::runOnFunction(llvm::Function&) (/opt/compiler-explorer/clang-assertions-10.0.0/bin/clang+0x21cb54a)
#18 0x00000000021cbba1 llvm::FPPassManager::runOnModule(llvm::Module&) (/opt/compiler-explorer/clang-assertions-10.0.0/bin/clang+0x21cbba1)
#19 0x00000000021cbf29 llvm::legacy::PassManagerImpl::run(llvm::Module&) (/opt/compiler-explorer/clang-assertions-10.0.0/bin/clang+0x21cbf29)
#20 0x0000000002b3a7a7 clang::EmitBackendOutput(clang::DiagnosticsEngine&, clang::HeaderSearchOptions const&, clang::CodeGenOptions const&, clang::TargetOptions const&, clang::LangOptions const&, llvm::DataLayout const&, llvm::Module*, clang::BackendAction, std::unique_ptr<llvm::raw_pwrite_stream, std::default_delete<llvm::raw_pwrite_stream> >) (/opt/compiler-explorer/clang-assertions-10.0.0/bin/clang+0x2b3a7a7)
#21 0x000000000375a7d6 clang::BackendConsumer::HandleTranslationUnit(clang::ASTContext&) (/opt/compiler-explorer/clang-assertions-10.0.0/bin/clang+0x375a7d6)
#22 0x00000000045a4311 clang::ParseAST(clang::Sema&, bool, bool) (/opt/compiler-explorer/clang-assertions-10.0.0/bin/clang+0x45a4311)
#23 0x00000000037592a8 clang::CodeGenAction::ExecuteAction() (/opt/compiler-explorer/clang-assertions-10.0.0/bin/clang+0x37592a8)
#24 0x00000000030f69a9 clang::FrontendAction::Execute() (/opt/compiler-explorer/clang-assertions-10.0.0/bin/clang+0x30f69a9)
#25 0x00000000030b228e clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) (/opt/compiler-explorer/clang-assertions-10.0.0/bin/clang+0x30b228e)
#26 0x00000000031c5c2b clang::ExecuteCompilerInvocation(clang::CompilerInstance*) (/opt/compiler-explorer/clang-assertions-10.0.0/bin/clang+0x31c5c2b)
#27 0x000000000096970e cc1_main(llvm::ArrayRef<char const*>, char const*, void*) (/opt/compiler-explorer/clang-assertions-10.0.0/bin/clang+0x96970e)
#28 0x0000000000965857 ExecuteCC1Tool(llvm::SmallVectorImpl<char const*>&) (/opt/compiler-explorer/clang-assertions-10.0.0/bin/clang+0x965857)
#29 0x00000000008cb8ac main (/opt/compiler-explorer/clang-assertions-10.0.0/bin/clang+0x8cb8ac)
#30 0x00007f16a3c456ca __libc_start_call_main ../sysdeps/nptl/libc_start_call_main.h:74:3
#31 0x00007f16a3c45785 call_init ../csu/libc-start.c:128:20
#32 0x00007f16a3c45785 __libc_start_main ../csu/libc-start.c:347:5
#33 0x000000000096541e _start (/opt/compiler-explorer/clang-assertions-10.0.0/bin/clang+0x96541e)
[1]    2032214 IOT instruction  "/opt/compiler-explorer/clang-assertions-10.0.0/bin/clang" "-cc1" "-triple"

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