Closed tinkerrc closed 1 year ago
Demo on Compiler Explorer
-mcpu=icelake-server
Code:
@G = global <1 x i1> <i1 true> @G.1 = global i1 false define void @foo(i32 %x) { %LGV = load <1 x i1>, ptr @G ; This works: ;%E = extractelement <1 x i1> <i1 true>, i32 %x ; This doesn't: %E = extractelement <1 x i1> %LGV, i32 %x store i1 %E, ptr @G.1 ret void }
Crash backtrace:
LLVM ERROR: Cannot select: 0x8191910: i8 = truncate 0x81912f0 0x81912f0: i128 = bitcast 0x81917c0 0x81917c0: v1i128 = sign_extend 0x8191440 0x8191440: v1i1,ch = load<(dereferenceable load (s8) from @G)> 0x8115160, 0x8191ad0, undef:i64 0x8191ad0: i64,ch = load<(load (s64) from got)> 0x8115160, 0x8191a60, undef:i64 0x8191a60: i64 = X86ISD::WrapperRIP TargetGlobalAddress:i64<ptr @G> 0 [TF=5] 0x8191590: i64 = TargetGlobalAddress<ptr @G> 0 [TF=5] 0x81913d0: i64 = undef 0x81913d0: i64 = undef In function: foo PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace. Stack dump: 0. Program arguments: /opt/compiler-explorer/clang-trunk/bin/llc -o /app/output.s -x86-asm-syntax=intel -mtriple=x86_64 -mcpu=icelake-server <source> 1. Running pass 'Function Pass Manager' on module '<source>'. 2. Running pass 'X86 DAG->DAG Instruction Selection' on function '@foo' #0 0x000000000305a128 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/opt/compiler-explorer/clang-trunk/bin/llc+0x305a128) #1 0x0000000003057cec SignalHandler(int) Signals.cpp:0:0 #2 0x00007f785178e420 __restore_rt (/lib/x86_64-linux-gnu/libpthread.so.0+0x14420) #3 0x00007f785125100b raise (/lib/x86_64-linux-gnu/libc.so.6+0x4300b) #4 0x00007f7851230859 abort (/lib/x86_64-linux-gnu/libc.so.6+0x22859) #5 0x000000000069de84 llvm::RISCVISAInfo::updateImplication() (.cold) RISCVISAInfo.cpp:0:0 #6 0x0000000002e42ef4 llvm::SelectionDAGISel::CannotYetSelect(llvm::SDNode*) (/opt/compiler-explorer/clang-trunk/bin/llc+0x2e42ef4) #7 0x0000000002e48585 llvm::SelectionDAGISel::SelectCodeCommon(llvm::SDNode*, unsigned char const*, unsigned int) (/opt/compiler-explorer/clang-trunk/bin/llc+0x2e48585) #8 0x000000000196ed1d (anonymous namespace)::X86DAGToDAGISel::Select(llvm::SDNode*) X86ISelDAGToDAG.cpp:0:0 #9 0x0000000002e40557 llvm::SelectionDAGISel::DoInstructionSelection() (/opt/compiler-explorer/clang-trunk/bin/llc+0x2e40557) #10 0x0000000002e4ce15 llvm::SelectionDAGISel::CodeGenAndEmitDAG() (/opt/compiler-explorer/clang-trunk/bin/llc+0x2e4ce15) #11 0x0000000002e4f869 llvm::SelectionDAGISel::SelectAllBasicBlocks(llvm::Function const&) (/opt/compiler-explorer/clang-trunk/bin/llc+0x2e4f869) #12 0x0000000002e51f36 llvm::SelectionDAGISel::runOnMachineFunction(llvm::MachineFunction&) (.part.0) SelectionDAGISel.cpp:0:0 #13 0x0000000001978741 (anonymous namespace)::X86DAGToDAGISel::runOnMachineFunction(llvm::MachineFunction&) X86ISelDAGToDAG.cpp:0:0 #14 0x0000000002439700 llvm::MachineFunctionPass::runOnFunction(llvm::Function&) (.part.0) MachineFunctionPass.cpp:0:0 #15 0x000000000291aeb2 llvm::FPPassManager::runOnFunction(llvm::Function&) (/opt/compiler-explorer/clang-trunk/bin/llc+0x291aeb2) #16 0x000000000291b031 llvm::FPPassManager::runOnModule(llvm::Module&) (/opt/compiler-explorer/clang-trunk/bin/llc+0x291b031) #17 0x000000000291cba0 llvm::legacy::PassManagerImpl::run(llvm::Module&) (/opt/compiler-explorer/clang-trunk/bin/llc+0x291cba0) #18 0x00000000007673f0 compileModule(char**, llvm::LLVMContext&) llc.cpp:0:0 #19 0x00000000006a8b82 main (/opt/compiler-explorer/clang-trunk/bin/llc+0x6a8b82) #20 0x00007f7851232083 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x24083) #21 0x000000000075f33e _start (/opt/compiler-explorer/clang-trunk/bin/llc+0x75f33e) Program terminated with signal: SIGSEGV Compiler returned: 139
@DataCorrupted @HazyFish
@llvm/issue-subscribers-backend-x86
Candidate patch: https://reviews.llvm.org/D156855
Demo on Compiler Explorer
-mcpu=icelake-server
is removed.Code:
Crash backtrace: