Segmentation fault building FFMPEG with polly/openmp

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Bugzilla Link	PR36612
Status	CONFIRMED
Importance	P normal
Reported by	Andrei Vukolov (andrei.vukolov@gmail.com)
Reported on	2018-03-06 02:34:53 -0800
Last modified on	2018-03-13 03:11:56 -0700
Version	trunk
Hardware	PC Linux
CC	llvm-bugs@lists.llvm.org
Fixed by commit(s)
Attachments	vf_premultiply-228c51.sh (5411 bytes, application/x-shellscript) vf_premultiply-228c51.c.tar.gz (315715 bytes, application/gzip)
Blocks
Blocked by
See also

clang produces the following:

NVCC    libavfilter/vf_scale_cuda.ptx
CC  libavfilter/vf_scale_vaapi.o
CC  libavfilter/vf_selectivecolor.o
CC  libavfilter/vf_separatefields.o
CC  libavfilter/vf_setfield.o
CC  libavfilter/vf_setparams.o
CC  libavfilter/vf_showinfo.o
CC  libavfilter/vf_showpalette.o
#0 0x0000000001f98e3a llvm::sys::PrintStackTrace(llvm::raw_ostream&)
(/home/twdragon/util/llvm/bin/clang-7.0+0x1f98e3a)
#1 0x0000000001f96f1e llvm::sys::RunSignalHandlers()
(/home/twdragon/util/llvm/bin/clang-7.0+0x1f96f1e)
#2 0x0000000001f9706c SignalHandler(int) (/home/twdragon/util/llvm/bin/clang-
7.0+0x1f9706c)
#3 0x00007f84c8511390 __restore_rt (/lib/x86_64-linux-
gnu/libpthread.so.0+0x11390)
#4 0x00000000017ce390 (anonymous
namespace)::MachineLICMBase::IsLoopInvariantInst(llvm::MachineInstr&) [clone
.constprop.341] (/home/twdragon/util/llvm/bin/clang-7.0+0x17ce390)
#5 0x00000000017d3aec (anonymous
namespace)::MachineLICMBase::HoistOutOfLoop(llvm::DomTreeNodeBase<llvm::MachineBasicBlock>*)
[clone .constprop.335] (/home/twdragon/util/llvm/bin/clang-7.0+0x17d3aec)
#6 0x00000000017d6bfb (anonymous
namespace)::MachineLICMBase::runOnMachineFunction(llvm::MachineFunction&)
(/home/twdragon/util/llvm/bin/clang-7.0+0x17d6bfb)
#7 0x00000000017c30b1 llvm::MachineFunctionPass::runOnFunction(llvm::Function&)
(/home/twdragon/util/llvm/bin/clang-7.0+0x17c30b1)
#8 0x0000000001aa3a9a llvm::FPPassManager::runOnFunction(llvm::Function&)
(/home/twdragon/util/llvm/bin/clang-7.0+0x1aa3a9a)
#9 0x0000000001aa3b43 llvm::FPPassManager::runOnModule(llvm::Module&)
(/home/twdragon/util/llvm/bin/clang-7.0+0x1aa3b43)
#10 0x0000000001aa3654 llvm::legacy::PassManagerImpl::run(llvm::Module&)
(/home/twdragon/util/llvm/bin/clang-7.0+0x1aa3654)
#11 0x000000000216daf6 (anonymous
namespace)::EmitAssemblyHelper::EmitAssembly(clang::BackendAction,
std::unique_ptr<llvm::raw_pwrite_stream,
std::default_delete<llvm::raw_pwrite_stream> >)
(/home/twdragon/util/llvm/bin/clang-7.0+0x216daf6)
#12 0x000000000216fbd2 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/twdragon/util/llvm/bin/clang-7.0+0x216fbd2)
#13 0x0000000002979f04
clang::BackendConsumer::HandleTranslationUnit(clang::ASTContext&)
(/home/twdragon/util/llvm/bin/clang-7.0+0x2979f04)
#14 0x0000000002b14850 clang::ParseAST(clang::Sema&, bool, bool)
(/home/twdragon/util/llvm/bin/clang-7.0+0x2b14850)
#15 0x00000000029794e7 clang::CodeGenAction::ExecuteAction()
(/home/twdragon/util/llvm/bin/clang-7.0+0x29794e7)
#16 0x00000000025256ce clang::FrontendAction::Execute()
(/home/twdragon/util/llvm/bin/clang-7.0+0x25256ce)
#17 0x00000000024f0b36
clang::CompilerInstance::ExecuteAction(clang::FrontendAction&)
(/home/twdragon/util/llvm/bin/clang-7.0+0x24f0b36)
#18 0x00000000025b91ac
clang::ExecuteCompilerInvocation(clang::CompilerInstance*)
(/home/twdragon/util/llvm/bin/clang-7.0+0x25b91ac)
#19 0x0000000000a25198 cc1_main(llvm::ArrayRef<char const*>, char const*,
void*) (/home/twdragon/util/llvm/bin/clang-7.0+0xa25198)
#20 0x00000000009897b7 main (/home/twdragon/util/llvm/bin/clang-7.0+0x9897b7)
#21 0x00007f84c7497830 __libc_start_main /build/glibc-Cl5G7W/glibc-
2.23/csu/../csu/libc-start.c:325:0
#22 0x0000000000a226e9 _start (/home/twdragon/util/llvm/bin/clang-7.0+0xa226e9)
Stack dump:
0.  Program arguments: /home/twdragon/util/llvm/bin/clang-7.0 -cc1 -triple
x86_64-unknown-linux-gnu -emit-obj -disable-free -disable-llvm-verifier -
discard-value-names -main-file-name vf_premultiply.c -mrelocation-model pic -
pic-level 2 -mthread-model posix -fno-signed-zeros -masm-verbose -mconstructor-
aliases -munwind-tables -fuse-init-array -target-cpu x86-64 -dwarf-column-info -
debug-info-kind=limited -dwarf-version=4 -debugger-tuning=gdb -momit-leaf-frame-
pointer -coverage-notes-file
/home/twdragon/src/ffmpeg/build/libavfilter/vf_premultiply.gcno -resource-dir
/home/twdragon/util/llvm/lib/clang/7.0.0 -dependency-file
libavfilter/vf_premultiply.d -MT libavfilter/vf_premultiply.o -I . -I src/ -D
_ISOC99_SOURCE -D _FILE_OFFSET_BITS=64 -D _LARGEFILE_SOURCE -D
_POSIX_C_SOURCE=200112 -D _XOPEN_SOURCE=600 -D PIC -D ZLIB_CONST -D
HAVE_AV_CONFIG_H -D BUILDING_avfilter -I /usr/include/harfbuzz -I
/usr/include/freetype2 -I /usr/include/fribidi -I /usr/include/freetype2 -I
/usr/include/freetype2 -I /usr/include/opus -I /usr/include/opus -I
/usr/include/alsa -D _REENTRANT -I /usr/include/SDL2 -internal-isystem
/usr/local/include -internal-isystem
/home/twdragon/util/llvm/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 -Wdeclaration-after-statement -Wall -Wdisabled-
optimization -Wpointer-arith -Wredundant-decls -Wwrite-strings -Wtype-limits -
Wundef -Wmissing-prototypes -Wno-pointer-to-int-cast -Wstrict-prototypes -
Wempty-body -Wno-parentheses -Wno-switch -Wno-format-zero-length -Wno-pointer-
sign -Wno-unused-const-variable -Werror=implicit-function-declaration -
Werror=missing-prototypes -Werror=return-type -std=c11 -fconst-strings -fdebug-
compilation-dir /home/twdragon/src/ffmpeg/build -ferror-limit 19 -fmessage-
length 96 -pthread -mstack-alignment=16 -fobjc-runtime=gcc -fdiagnostics-show-
option -fcolor-diagnostics -vectorize-loops -vectorize-slp -mllvm -polly -mllvm
-polly-parallel -o libavfilter/vf_premultiply.o -x c
src/libavfilter/vf_premultiply.c
1.  <eof> parser at end of file
2.  Code generation
3.  Running pass 'Function Pass Manager' on module
'src/libavfilter/vf_premultiply.c'.
4.  Running pass 'Early Machine Loop Invariant Code Motion' on function
'@unpremultiply16_polly_subfn'
CC  libavfilter/vf_shuffleframes.o
CC  libavfilter/vf_shuffleplanes.o
CC  libavfilter/vf_signalstats.o
CC  libavfilter/vf_signature.o
clang-7.0: error: unable to execute command: Segmentation fault (core dumped)
clang-7.0: error: clang frontend command failed due to signal (use -v to see
invocation)

while executing with polly and openmp enabled in build of ffmpeg with CUDA/NVCC
support.

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Attached vf_premultiply-228c51.sh (5411 bytes, application/x-shellscript): Invocating script

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Attached vf_premultiply-228c51.c.tar.gz (315715 bytes, application/gzip): Compressed source code fragment which produces the error