https://llvm.org/bugs/show_bug.cgi?id=31436
Bug ID: 31436
Summary: test-suite/MultiSource/Benchmarks/MiBench/consumer-lam
e miscompiles for AVX-512 target starting from r289073
Product: libraries
Version: trunk
Hardware: PC
OS: Windows NT
Status: NEW
Severity: normal
Priority: P
Component: Transformation Utilities
Assignee: unassignedb...@nondot.org
Reporter: zvi.racko...@intel.com
CC: llvm-bugs@lists.llvm.org
Classification: Unclassified
Created attachment 17774
--> https://llvm.org/bugs/attachment.cgi?id=17774&action=edit
Reproducer source
The attached reproducer was generated while running the LLVM test-suite for
the skylake-avx512 target.
I ran a 'git bisect' and pinned down commit 289073.
TO reproduce on my machine:
"/export/iusers/zrackove/llvm/build/bin/clang-4.0" "-cc1" "-triple"
"x86_64-unknown-linux-gnu" "-emit-obj" "-disable-free" "-main-file-name"
"layer3.c" "-mrelocation-model" "static" "-mthread-model" "posix"
"-fmath-errno" "-masm-verbose" "-mconstructor-aliases" "-munwind-tables"
"-fuse-init-array" "-target-cpu" "skylake-avx512" "-momit-leaf-frame-pointer"
"-dwarf-column-info" "-debugger-tuning=gdb" "-coverage-notes-file"
"/export/iusers/zrackove/SANDBOX/test-2016-12-20_16-55-53/MultiSource/Benchmarks/MiBench/consumer-lame/Output/layer3.llvm.gcno"
"-D" "HAVEMPGLIB" "-D" "LAMEPARSE" "-D" "NDEBUG" "-D" "__NO_MATH_INLINES" "-D"
"LAMESNDFILE" "-D" "_GNU_SOURCE" "-D" "__STDC_LIMIT_MACROS" "-D" "NDEBUG" "-O3"
"-ferror-limit" "19" "-fmessage-length" "0" "-fobjc-runtime=gcc"
"-fdiagnostics-show-option" "-vectorize-loops" "-vectorize-slp" "-x" "c"
"layer3-f2dc93.c"
Output:
#0 0x0000000002c26bec llvm::sys::PrintStackTrace(llvm::raw_ostream&)
/export/iusers/zrackove/llvm/build/../lib/Support/Unix/Signals.inc:402:11
#1 0x0000000002c270d9 PrintStackTraceSignalHandler(void*)
/export/iusers/zrackove/llvm/build/../lib/Support/Unix/Signals.inc:466:1
#2 0x0000000002c25463 llvm::sys::RunSignalHandlers()
/export/iusers/zrackove/llvm/build/../lib/Support/Signals.cpp:45:5
#3 0x0000000002c27434 SignalHandler(int)
/export/iusers/zrackove/llvm/build/../lib/Support/Unix/Signals.inc:256:1
#4 0x00007f4b3f011100 __restore_rt (/lib64/libpthread.so.0+0xf100)
#5 0x000000000263d454 llvm::GEPOperator::getSourceElementType() const
/export/iusers/zrackove/llvm/build/../lib/IR/Operator.cpp:10:17
#6 0x0000000001edcd47 (anonymous
namespace)::SymbolicallyEvaluateGEP(llvm::GEPOperator const*,
llvm::ArrayRef<llvm::Constant*>, llvm::DataLayout const&,
llvm::TargetLibraryInfo const*)
/export/iusers/zrackove/llvm/build/../lib/Analysis/ConstantFolding.cpp:792:9
#7 0x0000000001ecdd91 (anonymous
namespace)::ConstantFoldInstOperandsImpl(llvm::Value const*, unsigned int,
llvm::ArrayRef<llvm::Constant*>, llvm::DataLayout const&,
llvm::TargetLibraryInfo const*)
/export/iusers/zrackove/llvm/build/../lib/Analysis/ConstantFolding.cpp:1002:19
#8 0x0000000001ecd5b2 (anonymous
namespace)::ConstantFoldConstantImpl(llvm::Constant const*, llvm::DataLayout
const&, llvm::TargetLibraryInfo const*, llvm::SmallDenseMap<llvm::Constant*,
llvm::Constant*, 4u, llvm::DenseMapInfo<llvm::Constant*>,
llvm::detail::DenseMapPair<llvm::Constant*, llvm::Constant*> >&)
/export/iusers/zrackove/llvm/build/../lib/Analysis/ConstantFolding.cpp:1075:5
#9 0x0000000001ecdc59 llvm::ConstantFoldConstant(llvm::Constant const*,
llvm::DataLayout const&, llvm::TargetLibraryInfo const*)
/export/iusers/zrackove/llvm/build/../lib/Analysis/ConstantFolding.cpp:1158:10
#10 0x0000000001ede181 (anonymous namespace)::CastGEPIndices(llvm::Type*,
llvm::ArrayRef<llvm::Constant*>, llvm::Type*, llvm::Optional<unsigned int>,
llvm::DataLayout const&, llvm::TargetLibraryInfo const*)
/export/iusers/zrackove/llvm/build/../lib/Analysis/ConstantFolding.cpp:761:17
...
#253 0x0000000001ecd5b2 (anonymous
namespace)::ConstantFoldConstantImpl(llvm::Constant const*, llvm::DataLayout
const&, llvm::TargetLibraryInfo const*, llvm::SmallDenseMap<llvm::Constant*,
llvm::Constant*, 4u, llvm::DenseMapInfo<llvm::Constant*>,
llvm::detail::DenseMapPair<llvm::Constant*, llvm::Constant*> >&)
/export/iusers/zrackove/llvm/build/../lib/Analysis/ConstantFolding.cpp:1075:5
#254 0x0000000001ecdc59 llvm::ConstantFoldConstant(llvm::Constant const*,
llvm::DataLayout const&, llvm::TargetLibraryInfo const*)
/export/iusers/zrackove/llvm/build/../lib/Analysis/ConstantFolding.cpp:1158:10
#255 0x0000000001ede181 (anonymous namespace)::CastGEPIndices(llvm::Type*,
llvm::ArrayRef<llvm::Constant*>, llvm::Type*, llvm::Optional<unsigned int>,
llvm::DataLayout const&, llvm::TargetLibraryInfo const*)
/export/iusers/zrackove/llvm/build/../lib/Analysis/ConstantFolding.cpp:761:17
Stack dump:
0. Program arguments: /export/iusers/zrackove/llvm/build/bin/clang-4.0
-cc1 -triple x86_64-unknown-linux-gnu -emit-obj -disable-free -main-file-name
layer3.c -mrelocation-model static -mthread-model posix -fmath-errno
-masm-verbose -mconstructor-aliases -munwind-tables -fuse-init-array
-target-cpu skylake-avx512 -momit-leaf-frame-pointer -dwarf-column-info
-debugger-tuning=gdb -coverage-notes-file
/export/iusers/zrackove/SANDBOX/test-2016-12-20_16-55-53/MultiSource/Benchmarks/MiBench/consumer-lame/Output/layer3.llvm.gcno
-D HAVEMPGLIB -D LAMEPARSE -D NDEBUG -D __NO_MATH_INLINES -D LAMESNDFILE -D
_GNU_SOURCE -D __STDC_LIMIT_MACROS -D NDEBUG -O3 -ferror-limit 19
-fmessage-length 0 -fobjc-runtime=gcc -fdiagnostics-show-option
-vectorize-loops -vectorize-slp -x c layer3-f2dc93.c
1. <eof> parser at end of file
2. Per-module optimization passes
3. Running pass 'Function Pass Manager' on module 'layer3-f2dc93.c'.
4. Running pass 'Combine redundant instructions' on function
'@init_layer3'
./repro.sh: line 10: 40991 Segmentation fault
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