[llvm-bugs] [Bug 37360] New: clang crashes with both "-mllvm -enable-newgvn" and "-mllvm -polly": IMPLEMENTATION ERROR: Unhandled error state

via llvm-bugs llvm-bugs at lists.llvm.org
Mon May 7 17:52:42 PDT 2018


https://bugs.llvm.org/show_bug.cgi?id=37360

            Bug ID: 37360
           Summary: clang crashes with both "-mllvm -enable-newgvn" and
                    "-mllvm -polly": IMPLEMENTATION ERROR: Unhandled error
                    state
           Product: Polly
           Version: unspecified
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: Optimizer
          Assignee: polly-dev at googlegroups.com
          Reporter: helloqirun at gmail.com
                CC: llvm-bugs at lists.llvm.org

It happens at -O3 only and requires both "newgvn" and "polly".


$ clang-trunk -v
clang version 7.0.0 (trunk 331692)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /usr/local/bin


$ clang-trunk -mllvm -enable-newgvn -mllvm -polly -O3 abc.c
Assertion "!is_error()" failed at
/home/absozero/trunk/llvm/tools/polly/lib/External/isl/include/isl/isl-noexceptions.h:66
  IMPLEMENTATION ERROR: Unhandled error state
Stack dump:
0.      Program arguments: /home/absozero/trunk/root-clang/bin/clang-7 -cc1
-triple x86_64-unknown-linux-gnu -emit-obj -disable-free -main-file-name abc.c
-mrelocation-model static -mthread-model posix -fmath-errno -masm-verbose
-mconstructor-aliases -munwind-tables -fuse-init-array -target-cpu x86-64
-dwarf-column-info -debugger-tuning=gdb -momit-leaf-frame-pointer -resource-dir
/home/absozero/trunk/root-clang/lib/clang/7.0.0 -internal-isystem
/usr/local/include -internal-isystem
/home/absozero/trunk/root-clang/lib/clang/7.0.0/include
-internal-externc-isystem /usr/include/x86_64-linux-gnu
-internal-externc-isystem /include -internal-externc-isystem /usr/include -O3
-fdebug-compilation-dir /home/absozero/projects/reduction/crash -ferror-limit
19 -fmessage-length 142 -fobjc-runtime=gcc -fdiagnostics-show-option
-fcolor-diagnostics -vectorize-loops -vectorize-slp -mllvm -enable-newgvn
-mllvm -polly -o /tmp/abc-fff1d2.o -x c abc.c 
1.      <eof> parser at end of file
2.      Per-module optimization passes
3.      Running pass 'Function Pass Manager' on module 'abc.c'.
4.      Running pass 'Region Pass Manager' on function '@fn1'
5.      Running pass 'Polly - Create polyhedral description of Scops' on basic
block '%for.body9.lr.ph'
#0 0x000000000228988a llvm::sys::PrintStackTrace(llvm::raw_ostream&)
(/home/absozero/trunk/root-clang/bin/clang-7+0x228988a)
#1 0x000000000228772e llvm::sys::RunSignalHandlers()
(/home/absozero/trunk/root-clang/bin/clang-7+0x228772e)
#2 0x0000000002287882 SignalHandler(int)
(/home/absozero/trunk/root-clang/bin/clang-7+0x2287882)
#3 0x00007fa985352330 __restore_rt
(/lib/x86_64-linux-gnu/libpthread.so.0+0x10330)
#4 0x00007fa983ecfc37 gsignal
/build/eglibc-oGUzwX/eglibc-2.19/signal/../nptl/sysdeps/unix/sysv/linux/raise.c:56:0
#5 0x00007fa983ed3028 abort
/build/eglibc-oGUzwX/eglibc-2.19/stdlib/abort.c:91:0
#6 0x00000000029c0f15 polly::SCEVAffinator::checkForWrapping(llvm::SCEV const*,
std::pair<isl::noexceptions::pw_aff, isl::noexceptions::set>) const
(/home/absozero/trunk/root-clang/bin/clang-7+0x29c0f15)
#7 0x00000000029c2cd3 polly::SCEVAffinator::visit(llvm::SCEV const*)
(/home/absozero/trunk/root-clang/bin/clang-7+0x29c2cd3)
#8 0x00000000029c34d0 polly::SCEVAffinator::getPwAff(llvm::SCEV const*,
llvm::BasicBlock*) (/home/absozero/trunk/root-clang/bin/clang-7+0x29c34d0)
#9 0x0000000002968cb6 polly::Scop::getPwAff(llvm::SCEV const*,
llvm::BasicBlock*, bool)
(/home/absozero/trunk/root-clang/bin/clang-7+0x2968cb6)
#10 0x000000000297be2a getPwAff(polly::Scop&, llvm::BasicBlock*,
llvm::DenseMap<llvm::BasicBlock*, isl::noexceptions::set,
llvm::DenseMapInfo<llvm::BasicBlock*>,
llvm::detail::DenseMapPair<llvm::BasicBlock*, isl::noexceptions::set> >&,
llvm::SCEV const*, bool)
(/home/absozero/trunk/root-clang/bin/clang-7+0x297be2a)
#11 0x000000000297c9ff buildConditionSets(polly::Scop&, llvm::BasicBlock*,
llvm::Value*, llvm::TerminatorInst*, llvm::Loop*, isl_set*,
llvm::DenseMap<llvm::BasicBlock*, isl::noexceptions::set,
llvm::DenseMapInfo<llvm::BasicBlock*>,
llvm::detail::DenseMapPair<llvm::BasicBlock*, isl::noexceptions::set> >&,
llvm::SmallVectorImpl<isl_set*>&)
(/home/absozero/trunk/root-clang/bin/clang-7+0x297c9ff)
#12 0x000000000297cb9c buildConditionSets(polly::Scop&, llvm::BasicBlock*,
llvm::TerminatorInst*, llvm::Loop*, isl_set*, llvm::DenseMap<llvm::BasicBlock*,
isl::noexceptions::set, llvm::DenseMapInfo<llvm::BasicBlock*>,
llvm::detail::DenseMapPair<llvm::BasicBlock*, isl::noexceptions::set> >&,
llvm::SmallVectorImpl<isl_set*>&)
(/home/absozero/trunk/root-clang/bin/clang-7+0x297cb9c)
#13 0x0000000002986696
polly::Scop::buildDomainsWithBranchConstraints(llvm::Region*,
llvm::DominatorTree&, llvm::LoopInfo&, llvm::DenseMap<llvm::BasicBlock*,
isl::noexceptions::set, llvm::DenseMapInfo<llvm::BasicBlock*>,
llvm::detail::DenseMapPair<llvm::BasicBlock*, isl::noexceptions::set> >&)
(/home/absozero/trunk/root-clang/bin/clang-7+0x2986696)
#14 0x0000000002985b92
polly::Scop::buildDomainsWithBranchConstraints(llvm::Region*,
llvm::DominatorTree&, llvm::LoopInfo&, llvm::DenseMap<llvm::BasicBlock*,
isl::noexceptions::set, llvm::DenseMapInfo<llvm::BasicBlock*>,
llvm::detail::DenseMapPair<llvm::BasicBlock*, isl::noexceptions::set> >&)
(/home/absozero/trunk/root-clang/bin/clang-7+0x2985b92)
#15 0x0000000002986f3f polly::Scop::buildDomains(llvm::Region*,
llvm::DominatorTree&, llvm::LoopInfo&, llvm::DenseMap<llvm::BasicBlock*,
isl::noexceptions::set, llvm::DenseMapInfo<llvm::BasicBlock*>,
llvm::detail::DenseMapPair<llvm::BasicBlock*, isl::noexceptions::set> >&)
(/home/absozero/trunk/root-clang/bin/clang-7+0x2986f3f)
#16 0x0000000002992c0a polly::ScopBuilder::buildScop(llvm::Region&,
llvm::AssumptionCache&, llvm::OptimizationRemarkEmitter&)
(/home/absozero/trunk/root-clang/bin/clang-7+0x2992c0a)
#17 0x000000000299381a polly::ScopBuilder::ScopBuilder(llvm::Region*,
llvm::AssumptionCache&, llvm::AAResults&, llvm::DataLayout const&,
llvm::DominatorTree&, llvm::LoopInfo&, polly::ScopDetection&,
llvm::ScalarEvolution&, llvm::OptimizationRemarkEmitter&)
(/home/absozero/trunk/root-clang/bin/clang-7+0x299381a)
#18 0x000000000297759a polly::ScopInfoRegionPass::runOnRegion(llvm::Region*,
llvm::RGPassManager&) (/home/absozero/trunk/root-clang/bin/clang-7+0x297759a)
#19 0x000000000189e463 llvm::RGPassManager::runOnFunction(llvm::Function&)
(/home/absozero/trunk/root-clang/bin/clang-7+0x189e463)
#20 0x0000000001d88c83 llvm::FPPassManager::runOnFunction(llvm::Function&)
(/home/absozero/trunk/root-clang/bin/clang-7+0x1d88c83)
#21 0x0000000001d88d4c llvm::FPPassManager::runOnModule(llvm::Module&)
(/home/absozero/trunk/root-clang/bin/clang-7+0x1d88d4c)
#22 0x0000000001d8881d llvm::legacy::PassManagerImpl::run(llvm::Module&)
(/home/absozero/trunk/root-clang/bin/clang-7+0x1d8881d)
#23 0x000000000245c500 (anonymous
namespace)::EmitAssemblyHelper::EmitAssembly(clang::BackendAction,
std::unique_ptr<llvm::raw_pwrite_stream,
std::default_delete<llvm::raw_pwrite_stream> >)
(/home/absozero/trunk/root-clang/bin/clang-7+0x245c500)
#24 0x000000000245ddb1 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> >)
(/home/absozero/trunk/root-clang/bin/clang-7+0x245ddb1)
#25 0x0000000002cd0297
clang::BackendConsumer::HandleTranslationUnit(clang::ASTContext&)
(/home/absozero/trunk/root-clang/bin/clang-7+0x2cd0297)
#26 0x00000000031ff780 clang::ParseAST(clang::Sema&, bool, bool)
(/home/absozero/trunk/root-clang/bin/clang-7+0x31ff780)
#27 0x0000000002ccf64c clang::CodeGenAction::ExecuteAction()
(/home/absozero/trunk/root-clang/bin/clang-7+0x2ccf64c)
#28 0x00000000028674be clang::FrontendAction::Execute()
(/home/absozero/trunk/root-clang/bin/clang-7+0x28674be)
#29 0x0000000002832a76
clang::CompilerInstance::ExecuteAction(clang::FrontendAction&)
(/home/absozero/trunk/root-clang/bin/clang-7+0x2832a76)
#30 0x00000000028fbf90
clang::ExecuteCompilerInvocation(clang::CompilerInstance*)
(/home/absozero/trunk/root-clang/bin/clang-7+0x28fbf90)
#31 0x0000000000aaba88 cc1_main(llvm::ArrayRef<char const*>, char const*,
void*) (/home/absozero/trunk/root-clang/bin/clang-7+0xaaba88)
#32 0x0000000000a1b69c main
(/home/absozero/trunk/root-clang/bin/clang-7+0xa1b69c)
#33 0x00007fa983ebaf45 __libc_start_main
/build/eglibc-oGUzwX/eglibc-2.19/csu/libc-start.c:321:0
#34 0x0000000000aa7b49 _start
(/home/absozero/trunk/root-clang/bin/clang-7+0xaa7b49)
clang-7: error: unable to execute command: Aborted (core dumped)
clang-7: error: clang frontend command failed due to signal (use -v to see
invocation)
clang version 7.0.0 (trunk 331692)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /usr/local/bin
clang-7: note: diagnostic msg: PLEASE submit a bug report to
https://bugs.llvm.org/ and include the crash backtrace, preprocessed source,
and associated run script.
clang-7: note: diagnostic msg: 
********************

PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:
Preprocessed source(s) and associated run script(s) are located at:
clang-7: note: diagnostic msg: /tmp/abc-e41e58.c
clang-7: note: diagnostic msg: /tmp/abc-e41e58.sh
clang-7: note: diagnostic msg: 

********************



$ cat abc.c
int a;
short b, c;
long d, e, h, i;
char f, g;
void fn1() {
  d = 0;
  for (; d <= 40; d++)
    b -= b > 0;
  for (; c;) {
    for (; i; i++) {
      a = (f ? b : h) ? 0 : g;
      f = 0;
    }
    for (; e;)
      ;
  }
}

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