clang x86_84, trunk rev 321482. > cat f.c namespace a { typedef int b; struct c { template <typename d, typename e> struct f { using g = typename d::template h<e>::i; }; }; template <typename j, typename e> using k = typename c::f<j, e>::g; template <typename j> struct l { typedef typename j::m m; template <typename d> using n = k<j, d>; }; } namespace aa { template <typename j> struct o { typedef a::l<j> p; typedef typename p::m q; template <typename d> struct h { typedef typename p::template n<d> i; }; }; } namespace a { template <class d> class r { public: d &operator[](b); }; } namespace aa { template <typename d> class s { public: typedef d m; template <typename> struct h { typedef s i; }; }; } namespace a { template <typename d> using t = aa::s<d>; template <typename d> class ab : public t<d> {}; template <typename d, typename j> struct ac { typedef typename aa::o<j>::template h<d>::i ad; }; template <typename d, typename j = ab<d>> class u { typedef ac<d, j> ae; typedef typename ae::ad ad; typedef aa::o<ad> v; typedef typename v::q q; typedef b w; public: q af(w); }; } bool x; int y; struct z { char ag : 22; bool : 8; }; struct ah { z ai; }; a::u<int> aj; a::r<ah> ak; void al() { ak[2].ai.ag = x | ~~(32767 | aj.af(3)) ^ y; } > clang++ -std=c++11 -w -O0 -c f.c clang-6.0: /localdisk2/users/dybaboki/llvm/llvm-trunk-20171227/include/llvm/Support/Casting.h:241: typename std::enable_if<!is_simple_type<Y>::value, typename cast_retty<X, const Y>::ret_type>::type llvm::cast(const Y &) [X = llvm::ConstantSDNode, Y = llvm::SDValue]: Assertion `isa<X>(Val) && "cast<Ty>() argument of incompatible type!"' failed. #0 0x00000000013dfcbf llvm::sys::PrintStackTrace(llvm::raw_ostream&) (/localdisk2/users/dybaboki/llvm/bin-trunk-20171227/bin/clang-6.0+0x13dfcbf) #1 0x00000000013dffc6 SignalHandler(int) (/localdisk2/users/dybaboki/llvm/bin-trunk-20171227/bin/clang-6.0+0x13dffc6) #2 0x00007f3a3134c5e0 __restore_rt (/lib64/libpthread.so.0+0xf5e0) #3 0x00007f3a2fec51f7 __GI_raise (/lib64/libc.so.6+0x351f7) #4 0x00007f3a2fec68e8 __GI_abort (/lib64/libc.so.6+0x368e8) #5 0x00007f3a2febe266 __assert_fail_base (/lib64/libc.so.6+0x2e266) #6 0x00007f3a2febe312 (/lib64/libc.so.6+0x2e312) #7 0x0000000001a846dd (anonymous namespace)::DAGCombiner::visitAND(llvm::SDNode*) (/localdisk2/users/dybaboki/llvm/bin-trunk-20171227/bin/clang-6.0+0x1a846dd) #8 0x0000000001a57e45 (anonymous namespace)::DAGCombiner::visit(llvm::SDNode*) (/localdisk2/users/dybaboki/llvm/bin-trunk-20171227/bin/clang-6.0+0x1a57e45) #9 0x0000000001a5557c (anonymous namespace)::DAGCombiner::combine(llvm::SDNode*) (/localdisk2/users/dybaboki/llvm/bin-trunk-20171227/bin/clang-6.0+0x1a5557c) #10 0x0000000001a541ff llvm::SelectionDAG::Combine(llvm::CombineLevel, llvm::AAResults*, llvm::CodeGenOpt::Level) (/localdisk2/users/dybaboki/llvm/bin-trunk-20171227/bin/clang-6.0+0x1a541ff) #11 0x0000000001b9210f llvm::SelectionDAGISel::CodeGenAndEmitDAG() (/localdisk2/users/dybaboki/llvm/bin-trunk-20171227/bin/clang-6.0+0x1b9210f) #12 0x0000000001b901be llvm::SelectionDAGISel::SelectAllBasicBlocks(llvm::Function const&) (/localdisk2/users/dybaboki/llvm/bin-trunk-20171227/bin/clang-6.0+0x1b901be) #13 0x0000000001b8ca82 llvm::SelectionDAGISel::runOnMachineFunction(llvm::MachineFunction&) (/localdisk2/users/dybaboki/llvm/bin-trunk-20171227/bin/clang-6.0+0x1b8ca82) #14 0x0000000000851351 (anonymous namespace)::X86DAGToDAGISel::runOnMachineFunction(llvm::MachineFunction&) (/localdisk2/users/dybaboki/llvm/bin-trunk-20171227/bin/clang-6.0+0x851351) #15 0x0000000000c2153e llvm::MachineFunctionPass::runOnFunction(llvm::Function&) (/localdisk2/users/dybaboki/llvm/bin-trunk-20171227/bin/clang-6.0+0xc2153e) #16 0x0000000000f4775f llvm::FPPassManager::runOnFunction(llvm::Function&) (/localdisk2/users/dybaboki/llvm/bin-trunk-20171227/bin/clang-6.0+0xf4775f) #17 0x0000000000f47a23 llvm::FPPassManager::runOnModule(llvm::Module&) (/localdisk2/users/dybaboki/llvm/bin-trunk-20171227/bin/clang-6.0+0xf47a23) #18 0x0000000000f47f09 llvm::legacy::PassManagerImpl::run(llvm::Module&) (/localdisk2/users/dybaboki/llvm/bin-trunk-20171227/bin/clang-6.0+0xf47f09) #19 0x000000000157505f 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> >) (/localdisk2/users/dybaboki/llvm/bin-trunk-20171227/bin/clang-6.0+0x157505f) #20 0x0000000001c80ab6 clang::BackendConsumer::HandleTranslationUnit(clang::ASTContext&) (/localdisk2/users/dybaboki/llvm/bin-trunk-20171227/bin/clang-6.0+0x1c80ab6) #21 0x0000000002137a36 clang::ParseAST(clang::Sema&, bool, bool) (/localdisk2/users/dybaboki/llvm/bin-trunk-20171227/bin/clang-6.0+0x2137a36) #22 0x0000000001939eb8 clang::FrontendAction::Execute() (/localdisk2/users/dybaboki/llvm/bin-trunk-20171227/bin/clang-6.0+0x1939eb8) #23 0x00000000018fbe81 clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) (/localdisk2/users/dybaboki/llvm/bin-trunk-20171227/bin/clang-6.0+0x18fbe81) #24 0x00000000019c4a68 clang::ExecuteCompilerInvocation(clang::CompilerInstance*) (/localdisk2/users/dybaboki/llvm/bin-trunk-20171227/bin/clang-6.0+0x19c4a68) #25 0x00000000007a4daa cc1_main(llvm::ArrayRef<char const*>, char const*, void*) (/localdisk2/users/dybaboki/llvm/bin-trunk-20171227/bin/clang-6.0+0x7a4daa) #26 0x00000000007a30c9 main (/localdisk2/users/dybaboki/llvm/bin-trunk-20171227/bin/clang-6.0+0x7a30c9) #27 0x00007f3a2feb1c05 __libc_start_main (/lib64/libc.so.6+0x21c05) #28 0x00000000007a04f2 _start (/localdisk2/users/dybaboki/llvm/bin-trunk-20171227/bin/clang-6.0+0x7a04f2) Stack dump: 0. Program arguments: /localdisk2/users/dybaboki/llvm/bin-trunk-20171227/bin/clang-6.0 -cc1 -triple x86_64-unknown-linux-gnu -emit-obj -mrelax-all -disable-free -main-file-name f.c -mrelocation-model static -mthread-model posix -mdisable-fp-elim -fmath-errno -masm-verbose -mconstructor-aliases -munwind-tables -fuse-init-array -target-cpu x86-64 -dwarf-column-info -debugger-tuning=gdb -coverage-notes-file /users/dybaboki/yarpgen/yarpgen/test_run_dec19_reduce/result/clang/compfail/S_12_2880678421/f.gcno -resource-dir /localdisk2/users/dybaboki/llvm/bin-trunk-20171227/lib/clang/6.0.0 -internal-isystem /users/dybaboki/gcc/bin/lib/gcc/x86_64-pc-linux-gnu/8.0.0/../../../../include/c++/8.0.0 -internal-isystem /users/dybaboki/gcc/bin/lib/gcc/x86_64-pc-linux-gnu/8.0.0/../../../../include/c++/8.0.0/x86_64-pc-linux-gnu -internal-isystem /users/dybaboki/gcc/bin/lib/gcc/x86_64-pc-linux-gnu/8.0.0/../../../../include/c++/8.0.0/backward -internal-isystem /usr/local/include -internal-isystem /localdisk2/users/dybaboki/llvm/bin-trunk-20171227/lib/clang/6.0.0/include -internal-externc-isystem /include -internal-externc-isystem /usr/include -O0 -w -std=c++11 -fdeprecated-macro -fdebug-compilation-dir /users/dybaboki/yarpgen/yarpgen/test_run_dec19_reduce/result/clang/compfail/S_12_2880678421 -ferror-limit 19 -fmessage-length 204 -fobjc-runtime=gcc -fcxx-exceptions -fexceptions -fdiagnostics-show-option -fcolor-diagnostics -o f.o -x c++ f.c 1. <eof> parser at end of file 2. Code generation 3. Running pass 'Function Pass Manager' on module 'f.c'. 4. Running pass 'X86 DAG->DAG Instruction Selection' on function '@_Z2alv' clang-6.0: error: unable to execute command: Aborted (core dumped) clang-6.0: error: clang frontend command failed due to signal (use -v to see invocation) clang version 6.0.0 (trunk 321482) Target: x86_64-unknown-linux-gnu Thread model: posix InstalledDir: /users/dybaboki/llvm/bin-trunk-20171227/bin clang-6.0: note: diagnostic msg: PLEASE submit a bug report to http://llvm.org/bugs/ and include the crash backtrace, preprocessed source, and associated run script. clang-6.0: note: diagnostic msg: Error generating preprocessed source(s).
%"class.a::u" = type { i8 } %"class.a::r" = type { i8 } %struct.ah = type { %struct.z } %struct.z = type { [3 x i8], i8 } @x = global i8 0, align 1 @y = global i32 0, align 4 @aj = global %"class.a::u" zeroinitializer, align 1 @ak = global %"class.a::r" zeroinitializer, align 1 define void @_Z2alv() #0 { entry: %0 = load i8, i8* @x, align 1 %tobool = trunc i8 %0 to i1 %conv = zext i1 %tobool to i32 %call = call i32 @_ZN1a1uIiNS_2abIiEEE2afEi(%"class.a::u"* @aj, i32 3) %or = or i32 32767, %call %neg = xor i32 %or, -1 %neg1 = xor i32 %neg, -1 %1 = load i32, i32* @y, align 4 %xor = xor i32 %neg1, %1 %or2 = or i32 %conv, %xor %conv3 = trunc i32 %or2 to i8 %call4 = call dereferenceable(4) %struct.ah* @_ZN1a1rI2ahEixEi(%"class.a::r"* @ak, i32 2) %ai = getelementptr inbounds %struct.ah, %struct.ah* %call4, i32 0, i32 0 %2 = bitcast %struct.z* %ai to i24* %3 = zext i8 %conv3 to i24 %bf.load = load i24, i24* %2, align 2 %bf.value = and i24 %3, 4194303 %bf.clear = and i24 %bf.load, -4194304 %bf.set = or i24 %bf.clear, %bf.value store i24 %bf.set, i24* %2, align 2 ret void } declare i32 @_ZN1a1uIiNS_2abIiEEE2afEi(%"class.a::u"*, i32) #1 declare dereferenceable(4) %struct.ah* @_ZN1a1rI2ahEixEi(%"class.a::r"*, i32) #1
$ ./llc red.ll Assertion failed: (isa<X>(Val) && "cast<Ty>() argument of incompatible type!"), function cast, file ../include/llvm/Support/Casting.h, line 241. 0 llc 0x00000001083a094c llvm::sys::PrintStackTrace(llvm::raw_ostream&) + 60 1 llc 0x00000001083a0f49 PrintStackTraceSignalHandler(void*) + 25 2 llc 0x000000010839c989 llvm::sys::RunSignalHandlers() + 425 3 llc 0x00000001083a1722 SignalHandler(int) + 354 4 libsystem_platform.dylib 0x00007fff620d8f5a _sigtramp + 26 5 libsystem_platform.dylib 000000000000000000 _sigtramp + 2649911488 6 libsystem_c.dylib 0x00007fff61f03312 abort + 127 7 libsystem_c.dylib 0x00007fff61ecb368 basename_r + 0 8 llc 0x00000001081a5fb4 std::__1::enable_if<!(is_simple_type<llvm::SDValue>::value), llvm::cast_retty<llvm::ConstantSDNode, llvm::SDValue const>::ret_type>::type llvm::cast<llvm::ConstantSDNode, llvm::SDValue>(llvm::SDValue const&) + 100 9 llc 0x0000000107ebc0be (anonymous namespace)::DAGCombiner::BackwardsPropagateMask(llvm::SDNode*, llvm::SelectionDAG&) + 1022 10 llc 0x0000000107e72764 (anonymous namespace)::DAGCombiner::visitAND(llvm::SDNode*) + 6596 11 llc 0x0000000107e6070d (anonymous namespace)::DAGCombiner::visit(llvm::SDNode*) + 669 12 llc 0x0000000107e5fe38 (anonymous namespace)::DAGCombiner::combine(llvm::SDNode*) + 56 13 llc 0x0000000107e5cfc6 (anonymous namespace)::DAGCombiner::Run(llvm::CombineLevel) + 1286 14 llc 0x0000000107e5ca48 llvm::SelectionDAG::Combine(llvm::CombineLevel, llvm::AAResults*, llvm::CodeGenOpt::Level) + 104 15 llc 0x0000000108188eb2 llvm::SelectionDAGISel::CodeGenAndEmitDAG() + 6018 16 llc 0x0000000108187580 llvm::SelectionDAGISel::SelectBasicBlock(llvm::ilist_iterator<llvm::ilist_detail::node_options<llvm::Instruction, true, false, void>, false, true>, llvm::ilist_iterator<llvm::ilist_detail::node_options<llvm::Instruction, true, false, void>, false, true>, bool&) + 336 17 llc 0x0000000108185ec1 llvm::SelectionDAGISel::SelectAllBasicBlocks(llvm::Function const&) + 10257
Patch for review: https://reviews.llvm.org/D41667
Fix committed in https://reviews.llvm.org/rL321991
Merged to 6.0 in r322670.