https://llvm.org/bugs/show_bug.cgi?id=24241
Bug ID: 24241 Summary: crash due to -value-tracking-dom-conditions: "Bits known to be one AND zero?" Product: new-bugs Version: trunk Hardware: PC OS: All Status: NEW Severity: normal Priority: P Component: new bugs Assignee: unassignedb...@nondot.org Reporter: reg...@cs.utah.edu CC: llvmbugs@cs.uiuc.edu Classification: Unclassified regehr@higgs:~/test/reduce_crash_83860$ clang -c -O3 small.c -w regehr@higgs:~/test/reduce_crash_83860$ clang -c -O3 -mllvm -value-tracking-dom-conditions=true small.c -w clang-3.8: ../lib/Analysis/ValueTracking.cpp:1541: void computeKnownBits(llvm::Value *, llvm::APInt &, llvm::APInt &, const llvm::DataLayout &, unsigned int, const (anonymous namespace)::Query &): Assertion `(KnownZero & KnownOne) == 0 && "Bits known to be one AND zero?"' failed. #0 0x15de86a llvm::sys::PrintStackTrace(llvm::raw_ostream&) /home/regehr/llvm/build/../lib/Support/Unix/Signals.inc:404:15 #1 0x15ddd86 llvm::sys::RunSignalHandlers() /home/regehr/llvm/build/../lib/Support/Signals.cpp:35:5 #2 0x15dffb3 SignalHandler(int) /home/regehr/llvm/build/../lib/Support/Unix/Signals.inc:201:3 #3 0x7f546acf7340 __restore_rt (/lib/x86_64-linux-gnu/libpthread.so.0+0x10340) #4 0x7f5469eaacc9 gsignal /build/buildd/eglibc-2.19/signal/../nptl/sysdeps/unix/sysv/linux/raise.c:56:0 #5 0x7f5469eae0d8 abort /build/buildd/eglibc-2.19/stdlib/abort.c:91:0 #6 0x7f5469ea3b86 __assert_fail_base /build/buildd/eglibc-2.19/assert/assert.c:92:0 #7 0x7f5469ea3c32 (/lib/x86_64-linux-gnu/libc.so.6+0x2fc32) #8 0xfe7b06 llvm::cast_retty<llvm::Constant, llvm::Value*>::ret_type llvm::cast_or_null<llvm::Constant, llvm::Value>(llvm::Value*) /home/regehr/llvm/build/../include/llvm/Support/Casting.h:269:3 #9 0xfe7b06 llvm::GlobalAlias::getOperand(unsigned int) const /home/regehr/llvm/build/../include/llvm/IR/GlobalAlias.h:119:0 #10 0xfe7b06 llvm::GlobalAlias::getAliasee() /home/regehr/llvm/build/../include/llvm/IR/GlobalAlias.h:85:0 #11 0xfe7b06 computeKnownBits(llvm::Value*, llvm::APInt&, llvm::APInt&, llvm::DataLayout const&, unsigned int, (anonymous namespace)::Query const&) /home/regehr/llvm/build/../lib/Analysis/ValueTracking.cpp:1522:0 #12 0xfe701d (anonymous namespace)::Query::~Query() /home/regehr/llvm/build/../lib/Analysis/ValueTracking.cpp:96:8 #13 0xfe701d llvm::computeKnownBits(llvm::Value*, llvm::APInt&, llvm::APInt&, llvm::DataLayout const&, unsigned int, llvm::AssumptionCache*, llvm::Instruction const*, llvm::DominatorTree const*) /home/regehr/llvm/build/../lib/Analysis/ValueTracking.cpp:137:0 #14 0x13dfb0f llvm::InstCombiner::computeKnownBits(llvm::Value*, llvm::APInt&, llvm::APInt&, unsigned int, llvm::Instruction*) const /home/regehr/llvm/build/../lib/Transforms/InstCombine/InstCombineInternal.h:466:12 #15 0x13dfb0f llvm::InstCombiner::SimplifyDemandedUseBits(llvm::Value*, llvm::APInt, llvm::APInt&, llvm::APInt&, unsigned int, llvm::Instruction*) /home/regehr/llvm/build/../lib/Transforms/InstCombine/InstCombineSimplifyDemanded.cpp:226:0 #16 0x13e8ab8 llvm::InstCombiner::SimplifyDemandedBits(llvm::Use&, llvm::APInt, llvm::APInt&, llvm::APInt&, unsigned int) /home/regehr/llvm/build/../lib/Transforms/InstCombine/InstCombineSimplifyDemanded.cpp:75:19 #17 0x13e2415 llvm::InstCombiner::SimplifyDemandedUseBits(llvm::Value*, llvm::APInt, llvm::APInt&, llvm::APInt&, unsigned int, llvm::Instruction*) /home/regehr/llvm/build/../lib/Transforms/InstCombine/InstCombineSimplifyDemanded.cpp:503:9 #18 0x13df6b5 llvm::InstCombiner::SimplifyDemandedInstructionBits(llvm::Instruction&) /home/regehr/llvm/build/../lib/Transforms/InstCombine/InstCombineSimplifyDemanded.cpp:60:14 #19 0x13ab4bf llvm::InstCombiner::visitSExt(llvm::SExtInst&) /home/regehr/llvm/build/../lib/Transforms/InstCombine/InstCombineCasts.cpp:1064:7 #20 0x137ec5b llvm::InstCombiner::run() /home/regehr/llvm/build/../lib/Transforms/InstCombine/InstructionCombining.cpp:2777:31 #21 0x13806d6 combineInstructionsOverFunction(llvm::Function&, llvm::InstCombineWorklist&, llvm::AliasAnalysis*, llvm::AssumptionCache&, llvm::TargetLibraryInfo&, llvm::DominatorTree&, llvm::LoopInfo*) /home/regehr/llvm/build/../lib/Transforms/InstCombine/InstructionCombining.cpp:3024:9 #22 0x1383029 (anonymous namespace)::InstructionCombiningPass::runOnFunction(llvm::Function&) /home/regehr/llvm/build/../lib/Transforms/InstCombine/InstructionCombining.cpp:3098:1 #23 0x12db862 llvm::FPPassManager::runOnFunction(llvm::Function&) /home/regehr/llvm/build/../lib/IR/LegacyPassManager.cpp:1520:23 #24 0x1cc5768 (anonymous namespace)::CGPassManager::RunPassOnSCC(llvm::Pass*, llvm::CallGraphSCC&, llvm::CallGraph&, bool&, bool&) /home/regehr/llvm/build/../lib/Analysis/IPA/CallGraphSCCPass.cpp:150:20 #25 0x1cc5768 (anonymous namespace)::CGPassManager::RunAllPassesOnSCC(llvm::CallGraphSCC&, llvm::CallGraph&, bool&) /home/regehr/llvm/build/../lib/Analysis/IPA/CallGraphSCCPass.cpp:418:0 #26 0x1cc5768 (anonymous namespace)::CGPassManager::runOnModule(llvm::Module&) /home/regehr/llvm/build/../lib/Analysis/IPA/CallGraphSCCPass.cpp:474:0 #27 0x12dbea5 (anonymous namespace)::MPPassManager::runOnModule(llvm::Module&) /home/regehr/llvm/build/../lib/IR/LegacyPassManager.cpp:1596:23 #28 0x12dbea5 llvm::legacy::PassManagerImpl::run(llvm::Module&) /home/regehr/llvm/build/../lib/IR/LegacyPassManager.cpp:1698:0 #29 0x16cc0c3 (anonymous namespace)::EmitAssemblyHelper::EmitAssembly(clang::BackendAction, llvm::raw_pwrite_stream*) /home/regehr/llvm/build/../tools/clang/lib/CodeGen/BackendUtil.cpp:652:3 #30 0x16cc0c3 clang::EmitBackendOutput(clang::DiagnosticsEngine&, clang::CodeGenOptions const&, clang::TargetOptions const&, clang::LangOptions const&, llvm::StringRef, llvm::Module*, clang::BackendAction, llvm::raw_pwrite_stream*) /home/regehr/llvm/build/../tools/clang/lib/CodeGen/BackendUtil.cpp:668:0 #31 0x1bf1785 clang::BackendConsumer::HandleTranslationUnit(clang::ASTContext&) /home/regehr/llvm/build/../tools/clang/lib/CodeGen/CodeGenAction.cpp:186:7 #32 0x1ee95c3 void std::swap<bool>(bool&, bool&) /usr/lib/gcc/x86_64-linux-gnu/4.8/../../../../include/c++/4.8/bits/move.h:177:7 #33 0x1ee95c3 clang::ParseAST(clang::Sema&, bool, bool) /home/regehr/llvm/build/../tools/clang/lib/Parse/ParseAST.cpp:153:0 #34 0x197a94e clang::FrontendAction::Execute() /home/regehr/llvm/build/../tools/clang/lib/Frontend/FrontendAction.cpp:443:7 #35 0x194b02c clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) /home/regehr/llvm/build/../tools/clang/lib/Frontend/CompilerInstance.cpp:820:7 #36 0x19ee5dd clang::ExecuteCompilerInvocation(clang::CompilerInstance*) /home/regehr/llvm/build/../tools/clang/lib/FrontendTool/ExecuteCompilerInvocation.cpp:222:18 #37 0x715b44 cc1_main(llvm::ArrayRef<char const*>, char const*, void*) /home/regehr/llvm/build/../tools/clang/tools/driver/cc1_main.cpp:116:13 #38 0x7146f7 ExecuteCC1Tool(llvm::ArrayRef<char const*>, llvm::StringRef) /home/regehr/llvm/build/../tools/clang/tools/driver/driver.cpp:367:12 #39 0x7146f7 main /home/regehr/llvm/build/../tools/clang/tools/driver/driver.cpp:430:0 #40 0x7f5469e95ec5 __libc_start_main /build/buildd/eglibc-2.19/csu/libc-start.c:321:0 #41 0x711836 _start (/home/regehr/llvm-install/bin/clang-3.8+0x711836) Stack dump: 0. Program arguments: /home/regehr/llvm-install/bin/clang-3.8 -cc1 -triple x86_64-unknown-linux-gnu -emit-obj -disable-free -main-file-name small.c -mrelocation-model static -mthread-model posix -fmath-errno -masm-verbose -mconstructor-aliases -munwind-tables -fuse-init-array -target-cpu x86-64 -momit-leaf-frame-pointer -dwarf-column-info -coverage-file /home/regehr/test/reduce_crash_83860/small.c -resource-dir /home/regehr/llvm-install/bin/../lib/clang/3.8.0 -internal-isystem /usr/local/include -internal-isystem /home/regehr/llvm-install/bin/../lib/clang/3.8.0/include -internal-externc-isystem /usr/include/x86_64-linux-gnu -internal-externc-isystem /include -internal-externc-isystem /usr/include -O3 -w -fdebug-compilation-dir /home/regehr/test/reduce_crash_83860 -ferror-limit 19 -fmessage-length 109 -mstackrealign -fobjc-runtime=gcc -fdiagnostics-show-option -fcolor-diagnostics -vectorize-loops -vectorize-slp -mllvm -value-tracking-dom-conditions=true -o small.o -x c small.c 1. <eof> parser at end of file 2. Per-module optimization passes 3. Running pass 'CallGraph Pass Manager' on module 'small.c'. 4. Running pass 'Combine redundant instructions' on function '@fn3' clang-3.8: error: unable to execute command: Aborted (core dumped) clang-3.8: error: clang frontend command failed due to signal (use -v to see invocation) clang version 3.8.0 (trunk 243039) Target: x86_64-unknown-linux-gnu Thread model: posix clang-3.8: 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-3.8: note: diagnostic msg: ******************** PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT: Preprocessed source(s) and associated run script(s) are located at: clang-3.8: note: diagnostic msg: /tmp/small-debc8a.c clang-3.8: note: diagnostic msg: /tmp/small-debc8a.sh clang-3.8: note: diagnostic msg: ******************** regehr@higgs:~/test/reduce_crash_83860$ cat small.c long a; char fn1(); short fn2(); void fn3() { short b = 0; for (; b == -1; b--) if (a) ; else fn2(&b == 0) != fn1(b); } regehr@higgs:~/test/reduce_crash_83860$ clang -v clang version 3.8.0 (trunk 243039) Target: x86_64-unknown-linux-gnu Thread model: posix Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.4 Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.4.7 Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.8 Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.8.5 Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.9 Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.9.3 Selected GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.8 Candidate multilib: .;@m64 Candidate multilib: 32;@m32 Candidate multilib: x32;@mx32 Selected multilib: .;@m64 -- You are receiving this mail because: You are on the CC list for the bug.
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