[llvm-dev] retpoline mitigation and 6.0

David Woodhouse via llvm-dev llvm-dev at lists.llvm.org
Wed Feb 7 02:49:25 PST 2018 

On Wed, 2018-02-07 at 06:20 +0000, Chandler Carruth wrote:
> I've landed the patch in r324449.
> 
> Before we merge this into two different Clang release branches and
> almost immediately release one of them, I would really like someone
> to confirm that this patch works well with the Linux kernel. David,
> if you're up for that, it would be great. Alternatively, Guenter or
> someone else here can help.

Hm, please could we also have the %V asm constraint modifier? That
allows us to emit calls to the thunks from inline asm using the
register that the compiler chose for us:

 asm volatile ("call __x86_indirect_thunk_%V[thunk_target]" : :
		[thunk_target] "r" (the_function)); 

Other than that, I get the following errors with LLVM+Clang master, and
my tree at
http://git.infradead.org/users/dwmw2/linux-retpoline.git/shortlog/refs/heads/ibpb

I haven't paid much attention to llvmlinux for a while; are these
expected? I'll try turning off config options until I can get something
to build...

Script started on 2018-02-07 10:36:07+0000
]0;dwoodhou at i7:~/git/linux-2.6[dwoodhou at i7 linux-2.6]$ make CC=~/git/llvm-build/bin/clang vmlinux  -k
  CHK     include/config/kernel.release
  CHK     include/generated/uapi/linux/version.h
  CHK     include/generated/utsrelease.h
  CHK     include/generated/bounds.h
  CHK     include/generated/timeconst.h
  CHK     include/generated/asm-offsets.h
  CALL    scripts/checksyscalls.sh
  DESCEND  objtool
  CHK     scripts/mod/devicetable-offsets.h
  CHK     include/generated/compile.h
  CC      arch/x86/events/core.o
clang-7.0: /home/dwmw2/git/llvm/lib/Analysis/ScalarEvolution.cpp:9092: bool llvm::ScalarEvolution::isLoopEntryGuardedByCond(const llvm::Loop*, llvm::CmpInst::Predicate, const llvm::SCEV*, const llvm::SCEV*): Assertion `(!ProvedNonStrictComparison || !ProvedNonEquality) && "Why we were unable to prove (Pred, LHS, RHS) via constant ranges?"' failed.
#0 0x0000000003cdcc0e llvm::sys::PrintStackTrace(llvm::raw_ostream&) /home/dwmw2/git/llvm/lib/Support/Unix/Signals.inc:398:0
#1 0x0000000003cdcca1 PrintStackTraceSignalHandler(void*) /home/dwmw2/git/llvm/lib/Support/Unix/Signals.inc:462:0
#2 0x0000000003cdb146 llvm::sys::RunSignalHandlers() /home/dwmw2/git/llvm/lib/Support/Signals.cpp:49:0
#3 0x0000000003cdc583 SignalHandler(int) /home/dwmw2/git/llvm/lib/Support/Unix/Signals.inc:252:0
#4 0x00007f9b52e75a80 __restore_rt (/lib64/libpthread.so.0+0x12a80)
#5 0x00007f9b5197666b __GI_raise (/lib64/libc.so.6+0x3766b)
#6 0x00007f9b51978381 __GI_abort (/lib64/libc.so.6+0x39381)
#7 0x00007f9b5196e8fa __assert_fail_base (/lib64/libc.so.6+0x2f8fa)
#8 0x00007f9b5196e972 (/lib64/libc.so.6+0x2f972)
#9 0x0000000002f60e6b llvm::ScalarEvolution::isLoopEntryGuardedByCond(llvm::Loop const*, llvm::CmpInst::Predicate, llvm::SCEV const*, llvm::SCEV const*) /home/dwmw2/git/llvm/lib/Analysis/ScalarEvolution.cpp:9110:0
#10 0x0000000002f3a1f8 llvm::ScalarEvolution::getSignExtendExpr(llvm::SCEV const*, llvm::Type*, unsigned int) /home/dwmw2/git/llvm/lib/Analysis/ScalarEvolution.cpp:1991:0
#11 0x0000000003dd8df8 (anonymous namespace)::SimplifyIndvar::strengthenOverflowingOperation(llvm::BinaryOperator*, llvm::Value*) /home/dwmw2/git/llvm/lib/Transforms/Utils/SimplifyIndVar.cpp:652:0
#12 0x0000000003dd9578 (anonymous namespace)::SimplifyIndvar::simplifyUsers(llvm::PHINode*, llvm::IVVisitor*) /home/dwmw2/git/llvm/lib/Transforms/Utils/SimplifyIndVar.cpp:800:0
#13 0x0000000003dd9757 llvm::simplifyUsersOfIV(llvm::PHINode*, llvm::ScalarEvolution*, llvm::DominatorTree*, llvm::LoopInfo*, llvm::SmallVectorImpl<llvm::WeakTrackingVH>&, llvm::SCEVExpander&, llvm::IVVisitor*) /home/dwmw2/git/llvm/lib/Transforms/Utils/SimplifyIndVar.cpp:832:0
#14 0x0000000003a4235a (anonymous namespace)::IndVarSimplify::simplifyAndExtend(llvm::Loop*, llvm::SCEVExpander&, llvm::LoopInfo*) /home/dwmw2/git/llvm/lib/Transforms/Scalar/IndVarSimplify.cpp:1812:0
#15 0x0000000003a447db (anonymous namespace)::IndVarSimplify::run(llvm::Loop*) /home/dwmw2/git/llvm/lib/Transforms/Scalar/IndVarSimplify.cpp:2461:0
#16 0x0000000003a44f64 (anonymous namespace)::IndVarSimplifyLegacyPass::runOnLoop(llvm::Loop*, llvm::LPPassManager&) /home/dwmw2/git/llvm/lib/Transforms/Scalar/IndVarSimplify.cpp:2576:0
#17 0x0000000002ed44ff llvm::LPPassManager::runOnFunction(llvm::Function&) /home/dwmw2/git/llvm/lib/Analysis/LoopPass.cpp:204:0
#18 0x00000000035a1af1 llvm::FPPassManager::runOnFunction(llvm::Function&) /home/dwmw2/git/llvm/lib/IR/LegacyPassManager.cpp:1520:0
#19 0x0000000002e0311c (anonymous namespace)::CGPassManager::RunPassOnSCC(llvm::Pass*, llvm::CallGraphSCC&, llvm::CallGraph&, bool&, bool&) /home/dwmw2/git/llvm/lib/Analysis/CallGraphSCCPass.cpp:156:0
#20 0x0000000002e040a4 (anonymous namespace)::CGPassManager::RunAllPassesOnSCC(llvm::CallGraphSCC&, llvm::CallGraph&, bool&) /home/dwmw2/git/llvm/lib/Analysis/CallGraphSCCPass.cpp:423:0
#21 0x0000000002e043a5 (anonymous namespace)::CGPassManager::runOnModule(llvm::Module&) /home/dwmw2/git/llvm/lib/Analysis/CallGraphSCCPass.cpp:479:0
#22 0x00000000035a1fc3 (anonymous namespace)::MPPassManager::runOnModule(llvm::Module&) /home/dwmw2/git/llvm/lib/IR/LegacyPassManager.cpp:1597:0
#23 0x00000000035a2693 llvm::legacy::PassManagerImpl::run(llvm::Module&) /home/dwmw2/git/llvm/lib/IR/LegacyPassManager.cpp:1700:0
#24 0x00000000035a288b llvm::legacy::PassManager::run(llvm::Module&) /home/dwmw2/git/llvm/lib/IR/LegacyPassManager.cpp:1732:0
#25 0x0000000003f8b5d1 (anonymous namespace)::EmitAssemblyHelper::EmitAssembly(clang::BackendAction, std::unique_ptr<llvm::raw_pwrite_stream, std::default_delete<llvm::raw_pwrite_stream> >) /home/dwmw2/git/llvm/tools/clang/lib/CodeGen/BackendUtil.cpp:801:0
#26 0x0000000003f8df15 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/dwmw2/git/llvm/tools/clang/lib/CodeGen/BackendUtil.cpp:1180:0
#27 0x0000000004aec157 clang::BackendConsumer::HandleTranslationUnit(clang::ASTContext&) /home/dwmw2/git/llvm/tools/clang/lib/CodeGen/CodeGenAction.cpp:292:0
#28 0x00000000057fec75 clang::ParseAST(clang::Sema&, bool, bool) /home/dwmw2/git/llvm/tools/clang/lib/Parse/ParseAST.cpp:161:0
#29 0x00000000045f2b13 clang::ASTFrontendAction::ExecuteAction() /home/dwmw2/git/llvm/tools/clang/lib/Frontend/FrontendAction.cpp:1005:0
#30 0x0000000004aea206 clang::CodeGenAction::ExecuteAction() /home/dwmw2/git/llvm/tools/clang/lib/CodeGen/CodeGenAction.cpp:1032:0
#31 0x00000000045f256d clang::FrontendAction::Execute() /home/dwmw2/git/llvm/tools/clang/lib/Frontend/FrontendAction.cpp:908:0
#32 0x000000000459028f clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) /home/dwmw2/git/llvm/tools/clang/lib/Frontend/CompilerInstance.cpp:992:0
#33 0x0000000004734158 clang::ExecuteCompilerInvocation(clang::CompilerInstance*) /home/dwmw2/git/llvm/tools/clang/lib/FrontendTool/ExecuteCompilerInvocation.cpp:252:0
#34 0x0000000001c119a2 cc1_main(llvm::ArrayRef<char const*>, char const*, void*) /home/dwmw2/git/llvm/tools/clang/tools/driver/cc1_main.cpp:221:0
#35 0x0000000001c06f5d ExecuteCC1Tool(llvm::ArrayRef<char const*>, llvm::StringRef) /home/dwmw2/git/llvm/tools/clang/tools/driver/driver.cpp:309:0
#36 0x0000000001c07b94 main /home/dwmw2/git/llvm/tools/clang/tools/driver/driver.cpp:389:0
#37 0x00007f9b5196000a __libc_start_main (/lib64/libc.so.6+0x2100a)
#38 0x0000000001c0480a _start (/home/dwmw2/git/llvm-build/bin/clang-7.0+0x1c0480a)
Stack dump:
0.	Program arguments: /home/dwmw2/git/llvm-build/bin/clang-7.0 -cc1 -triple x86_64-unknown-linux-gnu -S -disable-free -main-file-name core.c -mrelocation-model static -mthread-model posix -mllvm -warn-stack-size=2048 -mdisable-fp-elim -relaxed-aliasing -fmath-errno -masm-verbose -no-integrated-as -mconstructor-aliases -fuse-init-array -mcode-model kernel -target-cpu x86-64 -target-feature -sse -target-feature -mmx -target-feature -sse2 -target-feature -3dnow -target-feature -avx -target-feature -x87 -target-feature +retpoline-external-thunk -disable-red-zone -dwarf-column-info -debug-info-kind=limited -dwarf-version=4 -debugger-tuning=gdb -coverage-notes-file /home/dwmw2/git/linux-2.6/arch/x86/events/core.gcno -nostdsysteminc -nobuiltininc -resource-dir /home/dwmw2/git/llvm-build/lib/clang/7.0.0 -dependency-file arch/x86/events/.core.o.d -MT arch/x86/events/core.o -sys-header-deps -isystem /home/dwmw2/git/llvm-build/lib/clang/7.0.0/include -include ./include/linux/kconfig.h -I ./arch/x86/include -I ./arch/x86/include/generated -I ./include -I ./arch/x86/include/uapi -I ./arch/x86/include/generated/uapi -I ./include/uapi -I ./include/generated/uapi -D __KERNEL__ -D CONFIG_AS_CFI=1 -D CONFIG_AS_CFI_SIGNAL_FRAME=1 -D CONFIG_AS_CFI_SECTIONS=1 -D CONFIG_AS_FXSAVEQ=1 -D CONFIG_AS_SSSE3=1 -D CONFIG_AS_CRC32=1 -D CONFIG_AS_AVX=1 -D CONFIG_AS_AVX2=1 -D CONFIG_AS_AVX512=1 -D CONFIG_AS_SHA1_NI=1 -D CONFIG_AS_SHA256_NI=1 -D RETPOLINE -D CC_USING_FENTRY -D KBUILD_BASENAME="core" -D KBUILD_MODNAME="core" -O2 -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs -Werror-implicit-function-declaration -Wno-format-security -Wno-sign-compare -Wno-unused-variable -Wno-format-invalid-specifier -Wno-gnu -Wno-address-of-packed-member -Wno-tautological-compare -Wdeclaration-after-statement -Wno-pointer-sign -Werror=implicit-int -Werror=strict-prototypes -Werror=date-time -Werror=incompatible-pointer-types -Wno-initializer-overrides -Wno-unused-value -Wno-format -Wno-sign-compare -Wno-format-zero-length -Wno-uninitialized -std=gnu89 -fno-dwarf-directory-asm -fdebug-compilation-dir /home/dwmw2/git/linux-2.6 -ferror-limit 19 -fmessage-length 80 -pg -mfentry -fwrapv -stack-protector 2 -mstack-alignment=8 -fwchar-type=short -fno-signed-wchar -fobjc-runtime=gcc -fno-common -fdiagnostics-show-option -fcolor-diagnostics -vectorize-loops -vectorize-slp -o /tmp/core-26897d.s -x c arch/x86/events/core.c 
1.	<eof> parser at end of file
2.	Per-module optimization passes
3.	Running pass 'CallGraph Pass Manager' on module 'arch/x86/events/core.c'.
4.	Running pass 'Loop Pass Manager' on function '@x86_reserve_hardware'
5.	Running pass 'Induction Variable Simplification' on basic block '%for.body15.i'
clang-7.0: error: unable to execute command: Aborted (core dumped)
clang-7.0: error: clang frontend command failed due to signal (use -v to see invocation)
clang version 7.0.0  (llvm/trunk 324455)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /home/dwmw2/git/llvm-build/bin
clang-7.0: 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-7.0: note: diagnostic msg: 
********************

PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:
Preprocessed source(s) and associated run script(s) are located at:
clang-7.0: note: diagnostic msg: /tmp/core-4220fe.c
clang-7.0: note: diagnostic msg: /tmp/core-4220fe.sh
clang-7.0: note: diagnostic msg: 

********************
make[2]: *** [scripts/Makefile.build:317: arch/x86/events/core.o] Error 254
make[2]: Target '__build' not remade because of errors.
make[1]: *** [scripts/Makefile.build:575: arch/x86/events] Error 2
  CC      arch/x86/hyperv/mmu.o
In file included from arch/x86/hyperv/mmu.c:9:
./arch/x86/include/asm/mshyperv.h:189:23: error: invalid operand in inline asm:
      'mov $4, %r8999: .pushsection .discard.nospec .long 999b - . .popsection
      661: call *$5662:.skip -(((6651f-6641f)-(662b-661b)) > 0) *
      ((6651f-6641f)-(662b-661b)),0x90663:.pushsection .altinstructions,"a"
      .long 661b - . .long 6641f - . .word ( 7*32+12) .byte 663b-661b .byte
      6651f-6641f .byte 663b-662b.popsection.pushsection .altinstr_replacement,
      "ax"6641: call __x86_indirect_thunk_${5:V}6651: .popsection'
        __asm__ __volatile__("mov %4, %%r8\n"
                             ^
./arch/x86/include/asm/mshyperv.h:189:23: error: invalid operand in inline asm:
      'mov $4, %r8999: .pushsection .discard.nospec .long 999b - . .popsection
      661: call *$5662:.skip -(((6651f-6641f)-(662b-661b)) > 0) *
      ((6651f-6641f)-(662b-661b)),0x90663:.pushsection .altinstructions,"a"
      .long 661b - . .long 6641f - . .word ( 7*32+12) .byte 663b-661b .byte
      6651f-6641f .byte 663b-662b.popsection.pushsection .altinstr_replacement,
      "ax"6641: call __x86_indirect_thunk_${5:V}6651: .popsection'
./arch/x86/include/asm/mshyperv.h:189:23: error: invalid operand in inline asm:
      'mov $4, %r8999: .pushsection .discard.nospec .long 999b - . .popsection
      661: call *$5662:.skip -(((6651f-6641f)-(662b-661b)) > 0) *
      ((6651f-6641f)-(662b-661b)),0x90663:.pushsection .altinstructions,"a"
      .long 661b - . .long 6641f - . .word ( 7*32+12) .byte 663b-661b .byte
      6651f-6641f .byte 663b-662b.popsection.pushsection .altinstr_replacement,
      "ax"6641: call __x86_indirect_thunk_${5:V}6651: .popsection'
./arch/x86/include/asm/mshyperv.h:189:23: error: invalid operand in inline asm:
      'mov $4, %r8999: .pushsection .discard.nospec .long 999b - . .popsection
      661: call *$5662:.skip -(((6651f-6641f)-(662b-661b)) > 0) *
      ((6651f-6641f)-(662b-661b)),0x90663:.pushsection .altinstructions,"a"
      .long 661b - . .long 6641f - . .word ( 7*32+12) .byte 663b-661b .byte
      6651f-6641f .byte 663b-662b.popsection.pushsection .altinstr_replacement,
      "ax"6641: call __x86_indirect_thunk_${5:V}6651: .popsection'
./arch/x86/include/asm/mshyperv.h:189:23: error: invalid operand in inline asm:
      'mov $4, %r8999: .pushsection .discard.nospec .long 999b - . .popsection
      661: call *$5662:.skip -(((6651f-6641f)-(662b-661b)) > 0) *
      ((6651f-6641f)-(662b-661b)),0x90663:.pushsection .altinstructions,"a"
      .long 661b - . .long 6641f - . .word ( 7*32+12) .byte 663b-661b .byte
      6651f-6641f .byte 663b-662b.popsection.pushsection .altinstr_replacement,
      "ax"6641: call __x86_indirect_thunk_${5:V}6651: .popsection'
./arch/x86/include/asm/mshyperv.h:189:23: error: invalid operand in inline asm:
      'mov $4, %r8999: .pushsection .discard.nospec .long 999b - . .popsection
      661: call *$5662:.skip -(((6651f-6641f)-(662b-661b)) > 0) *
      ((6651f-6641f)-(662b-661b)),0x90663:.pushsection .altinstructions,"a"
      .long 661b - . .long 6641f - . .word ( 7*32+12) .byte 663b-661b .byte
      6651f-6641f .byte 663b-662b.popsection.pushsection .altinstr_replacement,
      "ax"6641: call __x86_indirect_thunk_${5:V}6651: .popsection'
6 errors generated.
make[2]: *** [scripts/Makefile.build:317: arch/x86/hyperv/mmu.o] Error 1
make[2]: Target '__build' not remade because of errors.
make[1]: *** [scripts/Makefile.build:575: arch/x86/hyperv] Error 2
  CC      arch/x86/kernel/cpu/microcode/intel.o
clang-7.0: /home/dwmw2/git/llvm/lib/Analysis/ScalarEvolution.cpp:9092: bool llvm::ScalarEvolution::isLoopEntryGuardedByCond(const llvm::Loop*, llvm::CmpInst::Predicate, const llvm::SCEV*, const llvm::SCEV*): Assertion `(!ProvedNonStrictComparison || !ProvedNonEquality) && "Why we were unable to prove (Pred, LHS, RHS) via constant ranges?"' failed.
#0 0x0000000003cdcc0e llvm::sys::PrintStackTrace(llvm::raw_ostream&) /home/dwmw2/git/llvm/lib/Support/Unix/Signals.inc:398:0
#1 0x0000000003cdcca1 PrintStackTraceSignalHandler(void*) /home/dwmw2/git/llvm/lib/Support/Unix/Signals.inc:462:0
#2 0x0000000003cdb146 llvm::sys::RunSignalHandlers() /home/dwmw2/git/llvm/lib/Support/Signals.cpp:49:0
#3 0x0000000003cdc583 SignalHandler(int) /home/dwmw2/git/llvm/lib/Support/Unix/Signals.inc:252:0
#4 0x00007fc240864a80 __restore_rt (/lib64/libpthread.so.0+0x12a80)
#5 0x00007fc23f36566b __GI_raise (/lib64/libc.so.6+0x3766b)
#6 0x00007fc23f367381 __GI_abort (/lib64/libc.so.6+0x39381)
#7 0x00007fc23f35d8fa __assert_fail_base (/lib64/libc.so.6+0x2f8fa)
#8 0x00007fc23f35d972 (/lib64/libc.so.6+0x2f972)
#9 0x0000000002f60e6b llvm::ScalarEvolution::isLoopEntryGuardedByCond(llvm::Loop const*, llvm::CmpInst::Predicate, llvm::SCEV const*, llvm::SCEV const*) /home/dwmw2/git/llvm/lib/Analysis/ScalarEvolution.cpp:9110:0
#10 0x0000000002f3a1f8 llvm::ScalarEvolution::getSignExtendExpr(llvm::SCEV const*, llvm::Type*, unsigned int) /home/dwmw2/git/llvm/lib/Analysis/ScalarEvolution.cpp:1991:0
#11 0x0000000003dd8d75 (anonymous namespace)::SimplifyIndvar::strengthenOverflowingOperation(llvm::BinaryOperator*, llvm::Value*) /home/dwmw2/git/llvm/lib/Transforms/Utils/SimplifyIndVar.cpp:649:0
#12 0x0000000003dd9578 (anonymous namespace)::SimplifyIndvar::simplifyUsers(llvm::PHINode*, llvm::IVVisitor*) /home/dwmw2/git/llvm/lib/Transforms/Utils/SimplifyIndVar.cpp:800:0
#13 0x0000000003dd9757 llvm::simplifyUsersOfIV(llvm::PHINode*, llvm::ScalarEvolution*, llvm::DominatorTree*, llvm::LoopInfo*, llvm::SmallVectorImpl<llvm::WeakTrackingVH>&, llvm::SCEVExpander&, llvm::IVVisitor*) /home/dwmw2/git/llvm/lib/Transforms/Utils/SimplifyIndVar.cpp:832:0
#14 0x0000000003a4235a (anonymous namespace)::IndVarSimplify::simplifyAndExtend(llvm::Loop*, llvm::SCEVExpander&, llvm::LoopInfo*) /home/dwmw2/git/llvm/lib/Transforms/Scalar/IndVarSimplify.cpp:1812:0
#15 0x0000000003a447db (anonymous namespace)::IndVarSimplify::run(llvm::Loop*) /home/dwmw2/git/llvm/lib/Transforms/Scalar/IndVarSimplify.cpp:2461:0
#16 0x0000000003a44f64 (anonymous namespace)::IndVarSimplifyLegacyPass::runOnLoop(llvm::Loop*, llvm::LPPassManager&) /home/dwmw2/git/llvm/lib/Transforms/Scalar/IndVarSimplify.cpp:2576:0
#17 0x0000000002ed44ff llvm::LPPassManager::runOnFunction(llvm::Function&) /home/dwmw2/git/llvm/lib/Analysis/LoopPass.cpp:204:0
#18 0x00000000035a1af1 llvm::FPPassManager::runOnFunction(llvm::Function&) /home/dwmw2/git/llvm/lib/IR/LegacyPassManager.cpp:1520:0
#19 0x0000000002e0311c (anonymous namespace)::CGPassManager::RunPassOnSCC(llvm::Pass*, llvm::CallGraphSCC&, llvm::CallGraph&, bool&, bool&) /home/dwmw2/git/llvm/lib/Analysis/CallGraphSCCPass.cpp:156:0
#20 0x0000000002e040a4 (anonymous namespace)::CGPassManager::RunAllPassesOnSCC(llvm::CallGraphSCC&, llvm::CallGraph&, bool&) /home/dwmw2/git/llvm/lib/Analysis/CallGraphSCCPass.cpp:423:0
#21 0x0000000002e043a5 (anonymous namespace)::CGPassManager::runOnModule(llvm::Module&) /home/dwmw2/git/llvm/lib/Analysis/CallGraphSCCPass.cpp:479:0
#22 0x00000000035a1fc3 (anonymous namespace)::MPPassManager::runOnModule(llvm::Module&) /home/dwmw2/git/llvm/lib/IR/LegacyPassManager.cpp:1597:0
#23 0x00000000035a2693 llvm::legacy::PassManagerImpl::run(llvm::Module&) /home/dwmw2/git/llvm/lib/IR/LegacyPassManager.cpp:1700:0
#24 0x00000000035a288b llvm::legacy::PassManager::run(llvm::Module&) /home/dwmw2/git/llvm/lib/IR/LegacyPassManager.cpp:1732:0
#25 0x0000000003f8b5d1 (anonymous namespace)::EmitAssemblyHelper::EmitAssembly(clang::BackendAction, std::unique_ptr<llvm::raw_pwrite_stream, std::default_delete<llvm::raw_pwrite_stream> >) /home/dwmw2/git/llvm/tools/clang/lib/CodeGen/BackendUtil.cpp:801:0
#26 0x0000000003f8df15 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/dwmw2/git/llvm/tools/clang/lib/CodeGen/BackendUtil.cpp:1180:0
#27 0x0000000004aec157 clang::BackendConsumer::HandleTranslationUnit(clang::ASTContext&) /home/dwmw2/git/llvm/tools/clang/lib/CodeGen/CodeGenAction.cpp:292:0
#28 0x00000000057fec75 clang::ParseAST(clang::Sema&, bool, bool) /home/dwmw2/git/llvm/tools/clang/lib/Parse/ParseAST.cpp:161:0
#29 0x00000000045f2b13 clang::ASTFrontendAction::ExecuteAction() /home/dwmw2/git/llvm/tools/clang/lib/Frontend/FrontendAction.cpp:1005:0
#30 0x0000000004aea206 clang::CodeGenAction::ExecuteAction() /home/dwmw2/git/llvm/tools/clang/lib/CodeGen/CodeGenAction.cpp:1032:0
#31 0x00000000045f256d clang::FrontendAction::Execute() /home/dwmw2/git/llvm/tools/clang/lib/Frontend/FrontendAction.cpp:908:0
#32 0x000000000459028f clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) /home/dwmw2/git/llvm/tools/clang/lib/Frontend/CompilerInstance.cpp:992:0
#33 0x0000000004734158 clang::ExecuteCompilerInvocation(clang::CompilerInstance*) /home/dwmw2/git/llvm/tools/clang/lib/FrontendTool/ExecuteCompilerInvocation.cpp:252:0
#34 0x0000000001c119a2 cc1_main(llvm::ArrayRef<char const*>, char const*, void*) /home/dwmw2/git/llvm/tools/clang/tools/driver/cc1_main.cpp:221:0
#35 0x0000000001c06f5d ExecuteCC1Tool(llvm::ArrayRef<char const*>, llvm::StringRef) /home/dwmw2/git/llvm/tools/clang/tools/driver/driver.cpp:309:0
#36 0x0000000001c07b94 main /home/dwmw2/git/llvm/tools/clang/tools/driver/driver.cpp:389:0
#37 0x00007fc23f34f00a __libc_start_main (/lib64/libc.so.6+0x2100a)
#38 0x0000000001c0480a _start (/home/dwmw2/git/llvm-build/bin/clang-7.0+0x1c0480a)
Stack dump:
0.	Program arguments: /home/dwmw2/git/llvm-build/bin/clang-7.0 -cc1 -triple x86_64-unknown-linux-gnu -S -disable-free -main-file-name intel.c -mrelocation-model static -mthread-model posix -mllvm -warn-stack-size=2048 -mdisable-fp-elim -relaxed-aliasing -fmath-errno -masm-verbose -no-integrated-as -mconstructor-aliases -fuse-init-array -mcode-model kernel -target-cpu x86-64 -target-feature -sse -target-feature -mmx -target-feature -sse2 -target-feature -3dnow -target-feature -avx -target-feature -x87 -target-feature +retpoline-external-thunk -disable-red-zone -dwarf-column-info -debug-info-kind=limited -dwarf-version=4 -debugger-tuning=gdb -coverage-notes-file /home/dwmw2/git/linux-2.6/arch/x86/kernel/cpu/microcode/intel.gcno -nostdsysteminc -nobuiltininc -resource-dir /home/dwmw2/git/llvm-build/lib/clang/7.0.0 -dependency-file arch/x86/kernel/cpu/microcode/.intel.o.d -MT arch/x86/kernel/cpu/microcode/intel.o -sys-header-deps -isystem /home/dwmw2/git/llvm-build/lib/clang/7.0.0/include -include ./include/linux/kconfig.h -I ./arch/x86/include -I ./arch/x86/include/generated -I ./include -I ./arch/x86/include/uapi -I ./arch/x86/include/generated/uapi -I ./include/uapi -I ./include/generated/uapi -D __KERNEL__ -D CONFIG_AS_CFI=1 -D CONFIG_AS_CFI_SIGNAL_FRAME=1 -D CONFIG_AS_CFI_SECTIONS=1 -D CONFIG_AS_FXSAVEQ=1 -D CONFIG_AS_SSSE3=1 -D CONFIG_AS_CRC32=1 -D CONFIG_AS_AVX=1 -D CONFIG_AS_AVX2=1 -D CONFIG_AS_AVX512=1 -D CONFIG_AS_SHA1_NI=1 -D CONFIG_AS_SHA256_NI=1 -D RETPOLINE -D CC_USING_FENTRY -D KBUILD_BASENAME="intel" -D KBUILD_MODNAME="microcode" -O2 -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs -Werror-implicit-function-declaration -Wno-format-security -Wno-sign-compare -Wno-unused-variable -Wno-format-invalid-specifier -Wno-gnu -Wno-address-of-packed-member -Wno-tautological-compare -Wdeclaration-after-statement -Wno-pointer-sign -Werror=implicit-int -Werror=strict-prototypes -Werror=date-time -Werror=incompatible-pointer-types -Wno-initializer-overrides -Wno-unused-value -Wno-format -Wno-sign-compare -Wno-format-zero-length -Wno-uninitialized -std=gnu89 -fno-dwarf-directory-asm -fdebug-compilation-dir /home/dwmw2/git/linux-2.6 -ferror-limit 19 -fmessage-length 80 -pg -mfentry -fwrapv -stack-protector 2 -mstack-alignment=8 -fwchar-type=short -fno-signed-wchar -fobjc-runtime=gcc -fno-common -fdiagnostics-show-option -fcolor-diagnostics -vectorize-loops -vectorize-slp -o /tmp/intel-e7ba31.s -x c arch/x86/kernel/cpu/microcode/intel.c 
1.	<eof> parser at end of file
2.	Per-module optimization passes
3.	Running pass 'CallGraph Pass Manager' on module 'arch/x86/kernel/cpu/microcode/intel.c'.
4.	Running pass 'Loop Pass Manager' on function '@microcode_sanity_check'
5.	Running pass 'Induction Variable Simplification' on basic block '%while.body70'
clang-7.0: error: unable to execute command: Aborted (core dumped)
clang-7.0: error: clang frontend command failed due to signal (use -v to see invocation)
clang version 7.0.0  (llvm/trunk 324455)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /home/dwmw2/git/llvm-build/bin
clang-7.0: 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-7.0: note: diagnostic msg: 
********************

PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:
Preprocessed source(s) and associated run script(s) are located at:
clang-7.0: note: diagnostic msg: /tmp/intel-c10d76.c
clang-7.0: note: diagnostic msg: /tmp/intel-c10d76.sh
clang-7.0: note: diagnostic msg: 

********************
make[4]: *** [scripts/Makefile.build:317: arch/x86/kernel/cpu/microcode/intel.o] Error 254
make[4]: Target '__build' not remade because of errors.
make[3]: *** [scripts/Makefile.build:575: arch/x86/kernel/cpu/microcode] Error 2
make[3]: Target '__build' not remade because of errors.
make[2]: *** [scripts/Makefile.build:575: arch/x86/kernel/cpu] Error 2
make[2]: Target '__build' not remade because of errors.
make[1]: *** [scripts/Makefile.build:575: arch/x86/kernel] Error 2
  CC      arch/x86/xen/multicalls.o
In file included from arch/x86/xen/multicalls.c:27:
./arch/x86/include/asm/xen/hypercall.h:221:15: error: invalid operand in inline
      asm: '999: .pushsection .discard.nospec .long 999b - . .popsection 661:
      call *$7662:.skip -(((6651f-6641f)-(662b-661b)) > 0) *
      ((6651f-6641f)-(662b-661b)),0x90663:.pushsection .altinstructions,"a"
      .long 661b - . .long 6641f - . .word ( 7*32+12) .byte 663b-661b .byte
      6651f-6641f .byte 663b-662b.popsection.pushsection .altinstr_replacement,
      "ax"6641: call __x86_indirect_thunk_${7:V}6651: .popsection'
        asm volatile(CALL_NOSPEC
                     ^
./arch/x86/include/asm/nospec-branch.h:102:2: note: expanded from macro
      'CALL_NOSPEC'
        ANNOTATE_NOSPEC_ALTERNATIVE                             \
        ^
./arch/x86/include/asm/nospec-branch.h:90:2: note: expanded from macro
      'ANNOTATE_NOSPEC_ALTERNATIVE'
        "999:\n\t"                                              \
        ^
1 error generated.
make[2]: *** [scripts/Makefile.build:317: arch/x86/xen/multicalls.o] Error 1
make[2]: Target '__build' not remade because of errors.
make[1]: *** [scripts/Makefile.build:575: arch/x86/xen] Error 2
make[1]: Target '__build' not remade because of errors.
make: *** [Makefile:1018: arch/x86] Error 2
  CC      drivers/cpuidle/governors/menu.o
clang-7.0: /home/dwmw2/git/llvm/lib/Analysis/ScalarEvolution.cpp:9092: bool llvm::ScalarEvolution::isLoopEntryGuardedByCond(const llvm::Loop*, llvm::CmpInst::Predicate, const llvm::SCEV*, const llvm::SCEV*): Assertion `(!ProvedNonStrictComparison || !ProvedNonEquality) && "Why we were unable to prove (Pred, LHS, RHS) via constant ranges?"' failed.
#0 0x0000000003cdcc0e llvm::sys::PrintStackTrace(llvm::raw_ostream&) /home/dwmw2/git/llvm/lib/Support/Unix/Signals.inc:398:0
#1 0x0000000003cdcca1 PrintStackTraceSignalHandler(void*) /home/dwmw2/git/llvm/lib/Support/Unix/Signals.inc:462:0
#2 0x0000000003cdb146 llvm::sys::RunSignalHandlers() /home/dwmw2/git/llvm/lib/Support/Signals.cpp:49:0
#3 0x0000000003cdc583 SignalHandler(int) /home/dwmw2/git/llvm/lib/Support/Unix/Signals.inc:252:0
#4 0x00007f8d6a5baa80 __restore_rt (/lib64/libpthread.so.0+0x12a80)
#5 0x00007f8d690bb66b __GI_raise (/lib64/libc.so.6+0x3766b)
#6 0x00007f8d690bd381 __GI_abort (/lib64/libc.so.6+0x39381)
#7 0x00007f8d690b38fa __assert_fail_base (/lib64/libc.so.6+0x2f8fa)
#8 0x00007f8d690b3972 (/lib64/libc.so.6+0x2f972)
#9 0x0000000002f60e6b llvm::ScalarEvolution::isLoopEntryGuardedByCond(llvm::Loop const*, llvm::CmpInst::Predicate, llvm::SCEV const*, llvm::SCEV const*) /home/dwmw2/git/llvm/lib/Analysis/ScalarEvolution.cpp:9110:0
#10 0x0000000002f5f6d1 llvm::ScalarEvolution::isKnownPredicate(llvm::CmpInst::Predicate, llvm::SCEV const*, llvm::SCEV const*) /home/dwmw2/git/llvm/lib/Analysis/ScalarEvolution.cpp:8672:0
#11 0x0000000003a40edf (anonymous namespace)::WidenIV::pushNarrowIVUsers(llvm::Instruction*, llvm::Instruction*) /home/dwmw2/git/llvm/lib/Transforms/Scalar/IndVarSimplify.cpp:1510:0
#12 0x0000000003a415f4 (anonymous namespace)::WidenIV::createWideIV(llvm::SCEVExpander&) /home/dwmw2/git/llvm/lib/Transforms/Scalar/IndVarSimplify.cpp:1621:0
#13 0x0000000003a42464 (anonymous namespace)::IndVarSimplify::simplifyAndExtend(llvm::Loop*, llvm::SCEVExpander&, llvm::LoopInfo*) /home/dwmw2/git/llvm/lib/Transforms/Scalar/IndVarSimplify.cpp:1821:0
#14 0x0000000003a447db (anonymous namespace)::IndVarSimplify::run(llvm::Loop*) /home/dwmw2/git/llvm/lib/Transforms/Scalar/IndVarSimplify.cpp:2461:0
#15 0x0000000003a44f64 (anonymous namespace)::IndVarSimplifyLegacyPass::runOnLoop(llvm::Loop*, llvm::LPPassManager&) /home/dwmw2/git/llvm/lib/Transforms/Scalar/IndVarSimplify.cpp:2576:0
#16 0x0000000002ed44ff llvm::LPPassManager::runOnFunction(llvm::Function&) /home/dwmw2/git/llvm/lib/Analysis/LoopPass.cpp:204:0
#17 0x00000000035a1af1 llvm::FPPassManager::runOnFunction(llvm::Function&) /home/dwmw2/git/llvm/lib/IR/LegacyPassManager.cpp:1520:0
#18 0x0000000002e0311c (anonymous namespace)::CGPassManager::RunPassOnSCC(llvm::Pass*, llvm::CallGraphSCC&, llvm::CallGraph&, bool&, bool&) /home/dwmw2/git/llvm/lib/Analysis/CallGraphSCCPass.cpp:156:0
#19 0x0000000002e040a4 (anonymous namespace)::CGPassManager::RunAllPassesOnSCC(llvm::CallGraphSCC&, llvm::CallGraph&, bool&) /home/dwmw2/git/llvm/lib/Analysis/CallGraphSCCPass.cpp:423:0
#20 0x0000000002e043a5 (anonymous namespace)::CGPassManager::runOnModule(llvm::Module&) /home/dwmw2/git/llvm/lib/Analysis/CallGraphSCCPass.cpp:479:0
#21 0x00000000035a1fc3 (anonymous namespace)::MPPassManager::runOnModule(llvm::Module&) /home/dwmw2/git/llvm/lib/IR/LegacyPassManager.cpp:1597:0
#22 0x00000000035a2693 llvm::legacy::PassManagerImpl::run(llvm::Module&) /home/dwmw2/git/llvm/lib/IR/LegacyPassManager.cpp:1700:0
#23 0x00000000035a288b llvm::legacy::PassManager::run(llvm::Module&) /home/dwmw2/git/llvm/lib/IR/LegacyPassManager.cpp:1732:0
#24 0x0000000003f8b5d1 (anonymous namespace)::EmitAssemblyHelper::EmitAssembly(clang::BackendAction, std::unique_ptr<llvm::raw_pwrite_stream, std::default_delete<llvm::raw_pwrite_stream> >) /home/dwmw2/git/llvm/tools/clang/lib/CodeGen/BackendUtil.cpp:801:0
#25 0x0000000003f8df15 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/dwmw2/git/llvm/tools/clang/lib/CodeGen/BackendUtil.cpp:1180:0
#26 0x0000000004aec157 clang::BackendConsumer::HandleTranslationUnit(clang::ASTContext&) /home/dwmw2/git/llvm/tools/clang/lib/CodeGen/CodeGenAction.cpp:292:0
#27 0x00000000057fec75 clang::ParseAST(clang::Sema&, bool, bool) /home/dwmw2/git/llvm/tools/clang/lib/Parse/ParseAST.cpp:161:0
#28 0x00000000045f2b13 clang::ASTFrontendAction::ExecuteAction() /home/dwmw2/git/llvm/tools/clang/lib/Frontend/FrontendAction.cpp:1005:0
#29 0x0000000004aea206 clang::CodeGenAction::ExecuteAction() /home/dwmw2/git/llvm/tools/clang/lib/CodeGen/CodeGenAction.cpp:1032:0
#30 0x00000000045f256d clang::FrontendAction::Execute() /home/dwmw2/git/llvm/tools/clang/lib/Frontend/FrontendAction.cpp:908:0
#31 0x000000000459028f clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) /home/dwmw2/git/llvm/tools/clang/lib/Frontend/CompilerInstance.cpp:992:0
#32 0x0000000004734158 clang::ExecuteCompilerInvocation(clang::CompilerInstance*) /home/dwmw2/git/llvm/tools/clang/lib/FrontendTool/ExecuteCompilerInvocation.cpp:252:0
#33 0x0000000001c119a2 cc1_main(llvm::ArrayRef<char const*>, char const*, void*) /home/dwmw2/git/llvm/tools/clang/tools/driver/cc1_main.cpp:221:0
#34 0x0000000001c06f5d ExecuteCC1Tool(llvm::ArrayRef<char const*>, llvm::StringRef) /home/dwmw2/git/llvm/tools/clang/tools/driver/driver.cpp:309:0
#35 0x0000000001c07b94 main /home/dwmw2/git/llvm/tools/clang/tools/driver/driver.cpp:389:0
#36 0x00007f8d690a500a __libc_start_main (/lib64/libc.so.6+0x2100a)
#37 0x0000000001c0480a _start (/home/dwmw2/git/llvm-build/bin/clang-7.0+0x1c0480a)
Stack dump:
0.	Program arguments: /home/dwmw2/git/llvm-build/bin/clang-7.0 -cc1 -triple x86_64-unknown-linux-gnu -S -disable-free -main-file-name menu.c -mrelocation-model static -mthread-model posix -mllvm -warn-stack-size=2048 -mdisable-fp-elim -relaxed-aliasing -fmath-errno -masm-verbose -no-integrated-as -mconstructor-aliases -fuse-init-array -mcode-model kernel -target-cpu x86-64 -target-feature -sse -target-feature -mmx -target-feature -sse2 -target-feature -3dnow -target-feature -avx -target-feature -x87 -target-feature +retpoline-external-thunk -disable-red-zone -dwarf-column-info -debug-info-kind=limited -dwarf-version=4 -debugger-tuning=gdb -coverage-notes-file /home/dwmw2/git/linux-2.6/drivers/cpuidle/governors/menu.gcno -nostdsysteminc -nobuiltininc -resource-dir /home/dwmw2/git/llvm-build/lib/clang/7.0.0 -dependency-file drivers/cpuidle/governors/.menu.o.d -MT drivers/cpuidle/governors/menu.o -sys-header-deps -isystem /home/dwmw2/git/llvm-build/lib/clang/7.0.0/include -include ./include/linux/kconfig.h -I ./arch/x86/include -I ./arch/x86/include/generated -I ./include -I ./arch/x86/include/uapi -I ./arch/x86/include/generated/uapi -I ./include/uapi -I ./include/generated/uapi -D __KERNEL__ -D CONFIG_AS_CFI=1 -D CONFIG_AS_CFI_SIGNAL_FRAME=1 -D CONFIG_AS_CFI_SECTIONS=1 -D CONFIG_AS_FXSAVEQ=1 -D CONFIG_AS_SSSE3=1 -D CONFIG_AS_CRC32=1 -D CONFIG_AS_AVX=1 -D CONFIG_AS_AVX2=1 -D CONFIG_AS_AVX512=1 -D CONFIG_AS_SHA1_NI=1 -D CONFIG_AS_SHA256_NI=1 -D RETPOLINE -D CC_USING_FENTRY -D KBUILD_BASENAME="menu" -D KBUILD_MODNAME="menu" -O2 -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs -Werror-implicit-function-declaration -Wno-format-security -Wno-sign-compare -Wno-unused-variable -Wno-format-invalid-specifier -Wno-gnu -Wno-address-of-packed-member -Wno-tautological-compare -Wdeclaration-after-statement -Wno-pointer-sign -Werror=implicit-int -Werror=strict-prototypes -Werror=date-time -Werror=incompatible-pointer-types -Wno-initializer-overrides -Wno-unused-value -Wno-format -Wno-sign-compare -Wno-format-zero-length -Wno-uninitialized -std=gnu89 -fno-dwarf-directory-asm -fdebug-compilation-dir /home/dwmw2/git/linux-2.6 -ferror-limit 19 -fmessage-length 80 -pg -mfentry -fwrapv -stack-protector 2 -mstack-alignment=8 -fwchar-type=short -fno-signed-wchar -fobjc-runtime=gcc -fno-common -fdiagnostics-show-option -fcolor-diagnostics -vectorize-loops -vectorize-slp -o /tmp/menu-07e9d7.s -x c drivers/cpuidle/governors/menu.c 
1.	<eof> parser at end of file
2.	Per-module optimization passes
3.	Running pass 'CallGraph Pass Manager' on module 'drivers/cpuidle/governors/menu.c'.
4.	Running pass 'Loop Pass Manager' on function '@menu_select'
5.	Running pass 'Induction Variable Simplification' on basic block '%for.body'
clang-7.0: error: unable to execute command: Aborted (core dumped)
clang-7.0: error: clang frontend command failed due to signal (use -v to see invocation)
clang version 7.0.0  (llvm/trunk 324455)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /home/dwmw2/git/llvm-build/bin
clang-7.0: 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-7.0: note: diagnostic msg: 
********************

PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:
Preprocessed source(s) and associated run script(s) are located at:
clang-7.0: note: diagnostic msg: /tmp/menu-af3103.c
clang-7.0: note: diagnostic msg: /tmp/menu-af3103.sh
clang-7.0: note: diagnostic msg: 

********************
make[3]: *** [scripts/Makefile.build:317: drivers/cpuidle/governors/menu.o] Error 254
make[3]: Target '__build' not remade because of errors.
make[2]: *** [scripts/Makefile.build:575: drivers/cpuidle/governors] Error 2
make[2]: Target '__build' not remade because of errors.
make[1]: *** [scripts/Makefile.build:575: drivers/cpuidle] Error 2
  CC      drivers/pci/iov.o
clang-7.0: /home/dwmw2/git/llvm/lib/Analysis/ScalarEvolution.cpp:9092: bool llvm::ScalarEvolution::isLoopEntryGuardedByCond(const llvm::Loop*, llvm::CmpInst::Predicate, const llvm::SCEV*, const llvm::SCEV*): Assertion `(!ProvedNonStrictComparison || !ProvedNonEquality) && "Why we were unable to prove (Pred, LHS, RHS) via constant ranges?"' failed.
#0 0x0000000003cdcc0e llvm::sys::PrintStackTrace(llvm::raw_ostream&) /home/dwmw2/git/llvm/lib/Support/Unix/Signals.inc:398:0
#1 0x0000000003cdcca1 PrintStackTraceSignalHandler(void*) /home/dwmw2/git/llvm/lib/Support/Unix/Signals.inc:462:0
#2 0x0000000003cdb146 llvm::sys::RunSignalHandlers() /home/dwmw2/git/llvm/lib/Support/Signals.cpp:49:0
#3 0x0000000003cdc583 SignalHandler(int) /home/dwmw2/git/llvm/lib/Support/Unix/Signals.inc:252:0
#4 0x00007f05e113aa80 __restore_rt (/lib64/libpthread.so.0+0x12a80)
#5 0x00007f05dfc3b66b __GI_raise (/lib64/libc.so.6+0x3766b)
#6 0x00007f05dfc3d381 __GI_abort (/lib64/libc.so.6+0x39381)
#7 0x00007f05dfc338fa __assert_fail_base (/lib64/libc.so.6+0x2f8fa)
#8 0x00007f05dfc33972 (/lib64/libc.so.6+0x2f972)
#9 0x0000000002f60e6b llvm::ScalarEvolution::isLoopEntryGuardedByCond(llvm::Loop const*, llvm::CmpInst::Predicate, llvm::SCEV const*, llvm::SCEV const*) /home/dwmw2/git/llvm/lib/Analysis/ScalarEvolution.cpp:9110:0
#10 0x0000000002f3a1f8 llvm::ScalarEvolution::getSignExtendExpr(llvm::SCEV const*, llvm::Type*, unsigned int) /home/dwmw2/git/llvm/lib/Analysis/ScalarEvolution.cpp:1991:0
#11 0x0000000003dd8d75 (anonymous namespace)::SimplifyIndvar::strengthenOverflowingOperation(llvm::BinaryOperator*, llvm::Value*) /home/dwmw2/git/llvm/lib/Transforms/Utils/SimplifyIndVar.cpp:649:0
#12 0x0000000003dd9578 (anonymous namespace)::SimplifyIndvar::simplifyUsers(llvm::PHINode*, llvm::IVVisitor*) /home/dwmw2/git/llvm/lib/Transforms/Utils/SimplifyIndVar.cpp:800:0
#13 0x0000000003dd9757 llvm::simplifyUsersOfIV(llvm::PHINode*, llvm::ScalarEvolution*, llvm::DominatorTree*, llvm::LoopInfo*, llvm::SmallVectorImpl<llvm::WeakTrackingVH>&, llvm::SCEVExpander&, llvm::IVVisitor*) /home/dwmw2/git/llvm/lib/Transforms/Utils/SimplifyIndVar.cpp:832:0
#14 0x0000000003a4235a (anonymous namespace)::IndVarSimplify::simplifyAndExtend(llvm::Loop*, llvm::SCEVExpander&, llvm::LoopInfo*) /home/dwmw2/git/llvm/lib/Transforms/Scalar/IndVarSimplify.cpp:1812:0
#15 0x0000000003a447db (anonymous namespace)::IndVarSimplify::run(llvm::Loop*) /home/dwmw2/git/llvm/lib/Transforms/Scalar/IndVarSimplify.cpp:2461:0
#16 0x0000000003a44f64 (anonymous namespace)::IndVarSimplifyLegacyPass::runOnLoop(llvm::Loop*, llvm::LPPassManager&) /home/dwmw2/git/llvm/lib/Transforms/Scalar/IndVarSimplify.cpp:2576:0
#17 0x0000000002ed44ff llvm::LPPassManager::runOnFunction(llvm::Function&) /home/dwmw2/git/llvm/lib/Analysis/LoopPass.cpp:204:0
#18 0x00000000035a1af1 llvm::FPPassManager::runOnFunction(llvm::Function&) /home/dwmw2/git/llvm/lib/IR/LegacyPassManager.cpp:1520:0
#19 0x0000000002e0311c (anonymous namespace)::CGPassManager::RunPassOnSCC(llvm::Pass*, llvm::CallGraphSCC&, llvm::CallGraph&, bool&, bool&) /home/dwmw2/git/llvm/lib/Analysis/CallGraphSCCPass.cpp:156:0
#20 0x0000000002e040a4 (anonymous namespace)::CGPassManager::RunAllPassesOnSCC(llvm::CallGraphSCC&, llvm::CallGraph&, bool&) /home/dwmw2/git/llvm/lib/Analysis/CallGraphSCCPass.cpp:423:0
#21 0x0000000002e043a5 (anonymous namespace)::CGPassManager::runOnModule(llvm::Module&) /home/dwmw2/git/llvm/lib/Analysis/CallGraphSCCPass.cpp:479:0
#22 0x00000000035a1fc3 (anonymous namespace)::MPPassManager::runOnModule(llvm::Module&) /home/dwmw2/git/llvm/lib/IR/LegacyPassManager.cpp:1597:0
#23 0x00000000035a2693 llvm::legacy::PassManagerImpl::run(llvm::Module&) /home/dwmw2/git/llvm/lib/IR/LegacyPassManager.cpp:1700:0
#24 0x00000000035a288b llvm::legacy::PassManager::run(llvm::Module&) /home/dwmw2/git/llvm/lib/IR/LegacyPassManager.cpp:1732:0
#25 0x0000000003f8b5d1 (anonymous namespace)::EmitAssemblyHelper::EmitAssembly(clang::BackendAction, std::unique_ptr<llvm::raw_pwrite_stream, std::default_delete<llvm::raw_pwrite_stream> >) /home/dwmw2/git/llvm/tools/clang/lib/CodeGen/BackendUtil.cpp:801:0
#26 0x0000000003f8df15 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/dwmw2/git/llvm/tools/clang/lib/CodeGen/BackendUtil.cpp:1180:0
#27 0x0000000004aec157 clang::BackendConsumer::HandleTranslationUnit(clang::ASTContext&) /home/dwmw2/git/llvm/tools/clang/lib/CodeGen/CodeGenAction.cpp:292:0
#28 0x00000000057fec75 clang::ParseAST(clang::Sema&, bool, bool) /home/dwmw2/git/llvm/tools/clang/lib/Parse/ParseAST.cpp:161:0
#29 0x00000000045f2b13 clang::ASTFrontendAction::ExecuteAction() /home/dwmw2/git/llvm/tools/clang/lib/Frontend/FrontendAction.cpp:1005:0
#30 0x0000000004aea206 clang::CodeGenAction::ExecuteAction() /home/dwmw2/git/llvm/tools/clang/lib/CodeGen/CodeGenAction.cpp:1032:0
#31 0x00000000045f256d clang::FrontendAction::Execute() /home/dwmw2/git/llvm/tools/clang/lib/Frontend/FrontendAction.cpp:908:0
#32 0x000000000459028f clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) /home/dwmw2/git/llvm/tools/clang/lib/Frontend/CompilerInstance.cpp:992:0
#33 0x0000000004734158 clang::ExecuteCompilerInvocation(clang::CompilerInstance*) /home/dwmw2/git/llvm/tools/clang/lib/FrontendTool/ExecuteCompilerInvocation.cpp:252:0
#34 0x0000000001c119a2 cc1_main(llvm::ArrayRef<char const*>, char const*, void*) /home/dwmw2/git/llvm/tools/clang/tools/driver/cc1_main.cpp:221:0
#35 0x0000000001c06f5d ExecuteCC1Tool(llvm::ArrayRef<char const*>, llvm::StringRef) /home/dwmw2/git/llvm/tools/clang/tools/driver/driver.cpp:309:0
#36 0x0000000001c07b94 main /home/dwmw2/git/llvm/tools/clang/tools/driver/driver.cpp:389:0
#37 0x00007f05dfc2500a __libc_start_main (/lib64/libc.so.6+0x2100a)
#38 0x0000000001c0480a _start (/home/dwmw2/git/llvm-build/bin/clang-7.0+0x1c0480a)
Stack dump:
0.	Program arguments: /home/dwmw2/git/llvm-build/bin/clang-7.0 -cc1 -triple x86_64-unknown-linux-gnu -S -disable-free -main-file-name iov.c -mrelocation-model static -mthread-model posix -mllvm -warn-stack-size=2048 -mdisable-fp-elim -relaxed-aliasing -fmath-errno -masm-verbose -no-integrated-as -mconstructor-aliases -fuse-init-array -mcode-model kernel -target-cpu x86-64 -target-feature -sse -target-feature -mmx -target-feature -sse2 -target-feature -3dnow -target-feature -avx -target-feature -x87 -target-feature +retpoline-external-thunk -disable-red-zone -dwarf-column-info -debug-info-kind=limited -dwarf-version=4 -debugger-tuning=gdb -coverage-notes-file /home/dwmw2/git/linux-2.6/drivers/pci/iov.gcno -nostdsysteminc -nobuiltininc -resource-dir /home/dwmw2/git/llvm-build/lib/clang/7.0.0 -dependency-file drivers/pci/.iov.o.d -MT drivers/pci/iov.o -sys-header-deps -isystem /home/dwmw2/git/llvm-build/lib/clang/7.0.0/include -include ./include/linux/kconfig.h -I ./arch/x86/include -I ./arch/x86/include/generated -I ./include -I ./arch/x86/include/uapi -I ./arch/x86/include/generated/uapi -I ./include/uapi -I ./include/generated/uapi -D __KERNEL__ -D CONFIG_AS_CFI=1 -D CONFIG_AS_CFI_SIGNAL_FRAME=1 -D CONFIG_AS_CFI_SECTIONS=1 -D CONFIG_AS_FXSAVEQ=1 -D CONFIG_AS_SSSE3=1 -D CONFIG_AS_CRC32=1 -D CONFIG_AS_AVX=1 -D CONFIG_AS_AVX2=1 -D CONFIG_AS_AVX512=1 -D CONFIG_AS_SHA1_NI=1 -D CONFIG_AS_SHA256_NI=1 -D RETPOLINE -D CC_USING_FENTRY -D KBUILD_BASENAME="iov" -D KBUILD_MODNAME="iov" -O2 -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs -Werror-implicit-function-declaration -Wno-format-security -Wno-sign-compare -Wno-unused-variable -Wno-format-invalid-specifier -Wno-gnu -Wno-address-of-packed-member -Wno-tautological-compare -Wdeclaration-after-statement -Wno-pointer-sign -Werror=implicit-int -Werror=strict-prototypes -Werror=date-time -Werror=incompatible-pointer-types -Wno-initializer-overrides -Wno-unused-value -Wno-format -Wno-sign-compare -Wno-format-zero-length -Wno-uninitialized -std=gnu89 -fno-dwarf-directory-asm -fdebug-compilation-dir /home/dwmw2/git/linux-2.6 -ferror-limit 19 -fmessage-length 80 -pg -mfentry -fwrapv -stack-protector 2 -mstack-alignment=8 -fwchar-type=short -fno-signed-wchar -fobjc-runtime=gcc -fno-common -fdiagnostics-show-option -fcolor-diagnostics -vectorize-loops -vectorize-slp -o /tmp/iov-eee364.s -x c drivers/pci/iov.c 
1.	<eof> parser at end of file
2.	Per-module optimization passes
3.	Running pass 'CallGraph Pass Manager' on module 'drivers/pci/iov.c'.
4.	Running pass 'Loop Pass Manager' on function '@pci_enable_sriov'
5.	Running pass 'Induction Variable Simplification' on basic block '%while.body.i'
clang-7.0: error: unable to execute command: Aborted (core dumped)
clang-7.0: error: clang frontend command failed due to signal (use -v to see invocation)
clang version 7.0.0  (llvm/trunk 324455)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /home/dwmw2/git/llvm-build/bin
clang-7.0: 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-7.0: note: diagnostic msg: 
********************

PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:
Preprocessed source(s) and associated run script(s) are located at:
clang-7.0: note: diagnostic msg: /tmp/iov-d7800f.c
clang-7.0: note: diagnostic msg: /tmp/iov-d7800f.sh
clang-7.0: note: diagnostic msg: 

********************
make[2]: *** [scripts/Makefile.build:317: drivers/pci/iov.o] Error 254
make[2]: Target '__build' not remade because of errors.
make[1]: *** [scripts/Makefile.build:575: drivers/pci] Error 2
  CC      drivers/usb/host/xhci.o
clang-7.0: /home/dwmw2/git/llvm/lib/Analysis/ScalarEvolution.cpp:9092: bool llvm::ScalarEvolution::isLoopEntryGuardedByCond(const llvm::Loop*, llvm::CmpInst::Predicate, const llvm::SCEV*, const llvm::SCEV*): Assertion `(!ProvedNonStrictComparison || !ProvedNonEquality) && "Why we were unable to prove (Pred, LHS, RHS) via constant ranges?"' failed.
#0 0x0000000003cdcc0e llvm::sys::PrintStackTrace(llvm::raw_ostream&) /home/dwmw2/git/llvm/lib/Support/Unix/Signals.inc:398:0
#1 0x0000000003cdcca1 PrintStackTraceSignalHandler(void*) /home/dwmw2/git/llvm/lib/Support/Unix/Signals.inc:462:0
#2 0x0000000003cdb146 llvm::sys::RunSignalHandlers() /home/dwmw2/git/llvm/lib/Support/Signals.cpp:49:0
#3 0x0000000003cdc583 SignalHandler(int) /home/dwmw2/git/llvm/lib/Support/Unix/Signals.inc:252:0
#4 0x00007f7b05b99a80 __restore_rt (/lib64/libpthread.so.0+0x12a80)
#5 0x00007f7b0469a66b __GI_raise (/lib64/libc.so.6+0x3766b)
#6 0x00007f7b0469c381 __GI_abort (/lib64/libc.so.6+0x39381)
#7 0x00007f7b046928fa __assert_fail_base (/lib64/libc.so.6+0x2f8fa)
#8 0x00007f7b04692972 (/lib64/libc.so.6+0x2f972)
#9 0x0000000002f60e6b llvm::ScalarEvolution::isLoopEntryGuardedByCond(llvm::Loop const*, llvm::CmpInst::Predicate, llvm::SCEV const*, llvm::SCEV const*) /home/dwmw2/git/llvm/lib/Analysis/ScalarEvolution.cpp:9110:0
#10 0x0000000002f3a1f8 llvm::ScalarEvolution::getSignExtendExpr(llvm::SCEV const*, llvm::Type*, unsigned int) /home/dwmw2/git/llvm/lib/Analysis/ScalarEvolution.cpp:1991:0
#11 0x0000000003dd8df8 (anonymous namespace)::SimplifyIndvar::strengthenOverflowingOperation(llvm::BinaryOperator*, llvm::Value*) /home/dwmw2/git/llvm/lib/Transforms/Utils/SimplifyIndVar.cpp:652:0
#12 0x0000000003dd9578 (anonymous namespace)::SimplifyIndvar::simplifyUsers(llvm::PHINode*, llvm::IVVisitor*) /home/dwmw2/git/llvm/lib/Transforms/Utils/SimplifyIndVar.cpp:800:0
#13 0x0000000003dd9757 llvm::simplifyUsersOfIV(llvm::PHINode*, llvm::ScalarEvolution*, llvm::DominatorTree*, llvm::LoopInfo*, llvm::SmallVectorImpl<llvm::WeakTrackingVH>&, llvm::SCEVExpander&, llvm::IVVisitor*) /home/dwmw2/git/llvm/lib/Transforms/Utils/SimplifyIndVar.cpp:832:0
#14 0x0000000003a4235a (anonymous namespace)::IndVarSimplify::simplifyAndExtend(llvm::Loop*, llvm::SCEVExpander&, llvm::LoopInfo*) /home/dwmw2/git/llvm/lib/Transforms/Scalar/IndVarSimplify.cpp:1812:0
#15 0x0000000003a447db (anonymous namespace)::IndVarSimplify::run(llvm::Loop*) /home/dwmw2/git/llvm/lib/Transforms/Scalar/IndVarSimplify.cpp:2461:0
#16 0x0000000003a44f64 (anonymous namespace)::IndVarSimplifyLegacyPass::runOnLoop(llvm::Loop*, llvm::LPPassManager&) /home/dwmw2/git/llvm/lib/Transforms/Scalar/IndVarSimplify.cpp:2576:0
#17 0x0000000002ed44ff llvm::LPPassManager::runOnFunction(llvm::Function&) /home/dwmw2/git/llvm/lib/Analysis/LoopPass.cpp:204:0
#18 0x00000000035a1af1 llvm::FPPassManager::runOnFunction(llvm::Function&) /home/dwmw2/git/llvm/lib/IR/LegacyPassManager.cpp:1520:0
#19 0x0000000002e0311c (anonymous namespace)::CGPassManager::RunPassOnSCC(llvm::Pass*, llvm::CallGraphSCC&, llvm::CallGraph&, bool&, bool&) /home/dwmw2/git/llvm/lib/Analysis/CallGraphSCCPass.cpp:156:0
#20 0x0000000002e040a4 (anonymous namespace)::CGPassManager::RunAllPassesOnSCC(llvm::CallGraphSCC&, llvm::CallGraph&, bool&) /home/dwmw2/git/llvm/lib/Analysis/CallGraphSCCPass.cpp:423:0
#21 0x0000000002e043a5 (anonymous namespace)::CGPassManager::runOnModule(llvm::Module&) /home/dwmw2/git/llvm/lib/Analysis/CallGraphSCCPass.cpp:479:0
#22 0x00000000035a1fc3 (anonymous namespace)::MPPassManager::runOnModule(llvm::Module&) /home/dwmw2/git/llvm/lib/IR/LegacyPassManager.cpp:1597:0
#23 0x00000000035a2693 llvm::legacy::PassManagerImpl::run(llvm::Module&) /home/dwmw2/git/llvm/lib/IR/LegacyPassManager.cpp:1700:0
#24 0x00000000035a288b llvm::legacy::PassManager::run(llvm::Module&) /home/dwmw2/git/llvm/lib/IR/LegacyPassManager.cpp:1732:0
#25 0x0000000003f8b5d1 (anonymous namespace)::EmitAssemblyHelper::EmitAssembly(clang::BackendAction, std::unique_ptr<llvm::raw_pwrite_stream, std::default_delete<llvm::raw_pwrite_stream> >) /home/dwmw2/git/llvm/tools/clang/lib/CodeGen/BackendUtil.cpp:801:0
#26 0x0000000003f8df15 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/dwmw2/git/llvm/tools/clang/lib/CodeGen/BackendUtil.cpp:1180:0
#27 0x0000000004aec157 clang::BackendConsumer::HandleTranslationUnit(clang::ASTContext&) /home/dwmw2/git/llvm/tools/clang/lib/CodeGen/CodeGenAction.cpp:292:0
#28 0x00000000057fec75 clang::ParseAST(clang::Sema&, bool, bool) /home/dwmw2/git/llvm/tools/clang/lib/Parse/ParseAST.cpp:161:0
#29 0x00000000045f2b13 clang::ASTFrontendAction::ExecuteAction() /home/dwmw2/git/llvm/tools/clang/lib/Frontend/FrontendAction.cpp:1005:0
#30 0x0000000004aea206 clang::CodeGenAction::ExecuteAction() /home/dwmw2/git/llvm/tools/clang/lib/CodeGen/CodeGenAction.cpp:1032:0
#31 0x00000000045f256d clang::FrontendAction::Execute() /home/dwmw2/git/llvm/tools/clang/lib/Frontend/FrontendAction.cpp:908:0
#32 0x000000000459028f clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) /home/dwmw2/git/llvm/tools/clang/lib/Frontend/CompilerInstance.cpp:992:0
#33 0x0000000004734158 clang::ExecuteCompilerInvocation(clang::CompilerInstance*) /home/dwmw2/git/llvm/tools/clang/lib/FrontendTool/ExecuteCompilerInvocation.cpp:252:0
#34 0x0000000001c119a2 cc1_main(llvm::ArrayRef<char const*>, char const*, void*) /home/dwmw2/git/llvm/tools/clang/tools/driver/cc1_main.cpp:221:0
#35 0x0000000001c06f5d ExecuteCC1Tool(llvm::ArrayRef<char const*>, llvm::StringRef) /home/dwmw2/git/llvm/tools/clang/tools/driver/driver.cpp:309:0
#36 0x0000000001c07b94 main /home/dwmw2/git/llvm/tools/clang/tools/driver/driver.cpp:389:0
#37 0x00007f7b0468400a __libc_start_main (/lib64/libc.so.6+0x2100a)
#38 0x0000000001c0480a _start (/home/dwmw2/git/llvm-build/bin/clang-7.0+0x1c0480a)
Stack dump:
0.	Program arguments: /home/dwmw2/git/llvm-build/bin/clang-7.0 -cc1 -triple x86_64-unknown-linux-gnu -S -disable-free -main-file-name xhci.c -mrelocation-model static -mthread-model posix -mllvm -warn-stack-size=2048 -mdisable-fp-elim -relaxed-aliasing -fmath-errno -masm-verbose -no-integrated-as -mconstructor-aliases -fuse-init-array -mcode-model kernel -target-cpu x86-64 -target-feature -sse -target-feature -mmx -target-feature -sse2 -target-feature -3dnow -target-feature -avx -target-feature -x87 -target-feature +retpoline-external-thunk -disable-red-zone -dwarf-column-info -debug-info-kind=limited -dwarf-version=4 -debugger-tuning=gdb -coverage-notes-file /home/dwmw2/git/linux-2.6/drivers/usb/host/xhci.gcno -nostdsysteminc -nobuiltininc -resource-dir /home/dwmw2/git/llvm-build/lib/clang/7.0.0 -dependency-file drivers/usb/host/.xhci.o.d -MT drivers/usb/host/xhci.o -sys-header-deps -isystem /home/dwmw2/git/llvm-build/lib/clang/7.0.0/include -include ./include/linux/kconfig.h -I ./arch/x86/include -I ./arch/x86/include/generated -I ./include -I ./arch/x86/include/uapi -I ./arch/x86/include/generated/uapi -I ./include/uapi -I ./include/generated/uapi -D __KERNEL__ -D CONFIG_AS_CFI=1 -D CONFIG_AS_CFI_SIGNAL_FRAME=1 -D CONFIG_AS_CFI_SECTIONS=1 -D CONFIG_AS_FXSAVEQ=1 -D CONFIG_AS_SSSE3=1 -D CONFIG_AS_CRC32=1 -D CONFIG_AS_AVX=1 -D CONFIG_AS_AVX2=1 -D CONFIG_AS_AVX512=1 -D CONFIG_AS_SHA1_NI=1 -D CONFIG_AS_SHA256_NI=1 -D RETPOLINE -D CC_USING_FENTRY -D KBUILD_BASENAME="xhci" -D KBUILD_MODNAME="xhci_hcd" -O2 -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs -Werror-implicit-function-declaration -Wno-format-security -Wno-sign-compare -Wno-unused-variable -Wno-format-invalid-specifier -Wno-gnu -Wno-address-of-packed-member -Wno-tautological-compare -Wdeclaration-after-statement -Wno-pointer-sign -Werror=implicit-int -Werror=strict-prototypes -Werror=date-time -Werror=incompatible-pointer-types -Wno-initializer-overrides -Wno-unused-value -Wno-format -Wno-sign-compare -Wno-format-zero-length -Wno-uninitialized -std=gnu89 -fno-dwarf-directory-asm -fdebug-compilation-dir /home/dwmw2/git/linux-2.6 -ferror-limit 19 -fmessage-length 80 -pg -mfentry -fwrapv -stack-protector 2 -mstack-alignment=8 -fwchar-type=short -fno-signed-wchar -fobjc-runtime=gcc -fno-common -fdiagnostics-show-option -fcolor-diagnostics -vectorize-loops -vectorize-slp -o /tmp/xhci-514a71.s -x c drivers/usb/host/xhci.c 
1.	<eof> parser at end of file
2.	Per-module optimization passes
3.	Running pass 'CallGraph Pass Manager' on module 'drivers/usb/host/xhci.c'.
4.	Running pass 'Loop Pass Manager' on function '@xhci_try_enable_msi'
5.	Running pass 'Induction Variable Simplification' on basic block '%while.body.i'
clang-7.0: error: unable to execute command: Aborted (core dumped)
clang-7.0: error: clang frontend command failed due to signal (use -v to see invocation)
clang version 7.0.0  (llvm/trunk 324455)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /home/dwmw2/git/llvm-build/bin
clang-7.0: 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-7.0: note: diagnostic msg: 
********************

PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:
Preprocessed source(s) and associated run script(s) are located at:
clang-7.0: note: diagnostic msg: /tmp/xhci-4189be.c
clang-7.0: note: diagnostic msg: /tmp/xhci-4189be.sh
clang-7.0: note: diagnostic msg: 

********************
make[3]: *** [scripts/Makefile.build:317: drivers/usb/host/xhci.o] Error 254
make[3]: Target '__build' not remade because of errors.
make[2]: *** [scripts/Makefile.build:575: drivers/usb/host] Error 2
  CC      drivers/usb/mon/mon_bin.o
clang-7.0: /home/dwmw2/git/llvm/lib/Analysis/ScalarEvolution.cpp:9092: bool llvm::ScalarEvolution::isLoopEntryGuardedByCond(const llvm::Loop*, llvm::CmpInst::Predicate, const llvm::SCEV*, const llvm::SCEV*): Assertion `(!ProvedNonStrictComparison || !ProvedNonEquality) && "Why we were unable to prove (Pred, LHS, RHS) via constant ranges?"' failed.
#0 0x0000000003cdcc0e llvm::sys::PrintStackTrace(llvm::raw_ostream&) /home/dwmw2/git/llvm/lib/Support/Unix/Signals.inc:398:0
#1 0x0000000003cdcca1 PrintStackTraceSignalHandler(void*) /home/dwmw2/git/llvm/lib/Support/Unix/Signals.inc:462:0
#2 0x0000000003cdb146 llvm::sys::RunSignalHandlers() /home/dwmw2/git/llvm/lib/Support/Signals.cpp:49:0
#3 0x0000000003cdc583 SignalHandler(int) /home/dwmw2/git/llvm/lib/Support/Unix/Signals.inc:252:0
#4 0x00007f1117b0fa80 __restore_rt (/lib64/libpthread.so.0+0x12a80)
#5 0x00007f111661066b __GI_raise (/lib64/libc.so.6+0x3766b)
#6 0x00007f1116612381 __GI_abort (/lib64/libc.so.6+0x39381)
#7 0x00007f11166088fa __assert_fail_base (/lib64/libc.so.6+0x2f8fa)
#8 0x00007f1116608972 (/lib64/libc.so.6+0x2f972)
#9 0x0000000002f60e6b llvm::ScalarEvolution::isLoopEntryGuardedByCond(llvm::Loop const*, llvm::CmpInst::Predicate, llvm::SCEV const*, llvm::SCEV const*) /home/dwmw2/git/llvm/lib/Analysis/ScalarEvolution.cpp:9110:0
#10 0x0000000002f3a1f8 llvm::ScalarEvolution::getSignExtendExpr(llvm::SCEV const*, llvm::Type*, unsigned int) /home/dwmw2/git/llvm/lib/Analysis/ScalarEvolution.cpp:1991:0
#11 0x0000000003dd8d75 (anonymous namespace)::SimplifyIndvar::strengthenOverflowingOperation(llvm::BinaryOperator*, llvm::Value*) /home/dwmw2/git/llvm/lib/Transforms/Utils/SimplifyIndVar.cpp:649:0
#12 0x0000000003dd9578 (anonymous namespace)::SimplifyIndvar::simplifyUsers(llvm::PHINode*, llvm::IVVisitor*) /home/dwmw2/git/llvm/lib/Transforms/Utils/SimplifyIndVar.cpp:800:0
#13 0x0000000003dd9757 llvm::simplifyUsersOfIV(llvm::PHINode*, llvm::ScalarEvolution*, llvm::DominatorTree*, llvm::LoopInfo*, llvm::SmallVectorImpl<llvm::WeakTrackingVH>&, llvm::SCEVExpander&, llvm::IVVisitor*) /home/dwmw2/git/llvm/lib/Transforms/Utils/SimplifyIndVar.cpp:832:0
#14 0x0000000003a4235a (anonymous namespace)::IndVarSimplify::simplifyAndExtend(llvm::Loop*, llvm::SCEVExpander&, llvm::LoopInfo*) /home/dwmw2/git/llvm/lib/Transforms/Scalar/IndVarSimplify.cpp:1812:0
#15 0x0000000003a447db (anonymous namespace)::IndVarSimplify::run(llvm::Loop*) /home/dwmw2/git/llvm/lib/Transforms/Scalar/IndVarSimplify.cpp:2461:0
#16 0x0000000003a44f64 (anonymous namespace)::IndVarSimplifyLegacyPass::runOnLoop(llvm::Loop*, llvm::LPPassManager&) /home/dwmw2/git/llvm/lib/Transforms/Scalar/IndVarSimplify.cpp:2576:0
#17 0x0000000002ed44ff llvm::LPPassManager::runOnFunction(llvm::Function&) /home/dwmw2/git/llvm/lib/Analysis/LoopPass.cpp:204:0
#18 0x00000000035a1af1 llvm::FPPassManager::runOnFunction(llvm::Function&) /home/dwmw2/git/llvm/lib/IR/LegacyPassManager.cpp:1520:0
#19 0x0000000002e0311c (anonymous namespace)::CGPassManager::RunPassOnSCC(llvm::Pass*, llvm::CallGraphSCC&, llvm::CallGraph&, bool&, bool&) /home/dwmw2/git/llvm/lib/Analysis/CallGraphSCCPass.cpp:156:0
#20 0x0000000002e040a4 (anonymous namespace)::CGPassManager::RunAllPassesOnSCC(llvm::CallGraphSCC&, llvm::CallGraph&, bool&) /home/dwmw2/git/llvm/lib/Analysis/CallGraphSCCPass.cpp:423:0
#21 0x0000000002e043a5 (anonymous namespace)::CGPassManager::runOnModule(llvm::Module&) /home/dwmw2/git/llvm/lib/Analysis/CallGraphSCCPass.cpp:479:0
#22 0x00000000035a1fc3 (anonymous namespace)::MPPassManager::runOnModule(llvm::Module&) /home/dwmw2/git/llvm/lib/IR/LegacyPassManager.cpp:1597:0
#23 0x00000000035a2693 llvm::legacy::PassManagerImpl::run(llvm::Module&) /home/dwmw2/git/llvm/lib/IR/LegacyPassManager.cpp:1700:0
#24 0x00000000035a288b llvm::legacy::PassManager::run(llvm::Module&) /home/dwmw2/git/llvm/lib/IR/LegacyPassManager.cpp:1732:0
#25 0x0000000003f8b5d1 (anonymous namespace)::EmitAssemblyHelper::EmitAssembly(clang::BackendAction, std::unique_ptr<llvm::raw_pwrite_stream, std::default_delete<llvm::raw_pwrite_stream> >) /home/dwmw2/git/llvm/tools/clang/lib/CodeGen/BackendUtil.cpp:801:0
#26 0x0000000003f8df15 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/dwmw2/git/llvm/tools/clang/lib/CodeGen/BackendUtil.cpp:1180:0
#27 0x0000000004aec157 clang::BackendConsumer::HandleTranslationUnit(clang::ASTContext&) /home/dwmw2/git/llvm/tools/clang/lib/CodeGen/CodeGenAction.cpp:292:0
#28 0x00000000057fec75 clang::ParseAST(clang::Sema&, bool, bool) /home/dwmw2/git/llvm/tools/clang/lib/Parse/ParseAST.cpp:161:0
#29 0x00000000045f2b13 clang::ASTFrontendAction::ExecuteAction() /home/dwmw2/git/llvm/tools/clang/lib/Frontend/FrontendAction.cpp:1005:0
#30 0x0000000004aea206 clang::CodeGenAction::ExecuteAction() /home/dwmw2/git/llvm/tools/clang/lib/CodeGen/CodeGenAction.cpp:1032:0
#31 0x00000000045f256d clang::FrontendAction::Execute() /home/dwmw2/git/llvm/tools/clang/lib/Frontend/FrontendAction.cpp:908:0
#32 0x000000000459028f clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) /home/dwmw2/git/llvm/tools/clang/lib/Frontend/CompilerInstance.cpp:992:0
#33 0x0000000004734158 clang::ExecuteCompilerInvocation(clang::CompilerInstance*) /home/dwmw2/git/llvm/tools/clang/lib/FrontendTool/ExecuteCompilerInvocation.cpp:252:0
#34 0x0000000001c119a2 cc1_main(llvm::ArrayRef<char const*>, char const*, void*) /home/dwmw2/git/llvm/tools/clang/tools/driver/cc1_main.cpp:221:0
#35 0x0000000001c06f5d ExecuteCC1Tool(llvm::ArrayRef<char const*>, llvm::StringRef) /home/dwmw2/git/llvm/tools/clang/tools/driver/driver.cpp:309:0
#36 0x0000000001c07b94 main /home/dwmw2/git/llvm/tools/clang/tools/driver/driver.cpp:389:0
#37 0x00007f11165fa00a __libc_start_main (/lib64/libc.so.6+0x2100a)
#38 0x0000000001c0480a _start (/home/dwmw2/git/llvm-build/bin/clang-7.0+0x1c0480a)
Stack dump:
0.	Program arguments: /home/dwmw2/git/llvm-build/bin/clang-7.0 -cc1 -triple x86_64-unknown-linux-gnu -S -disable-free -main-file-name mon_bin.c -mrelocation-model static -mthread-model posix -mllvm -warn-stack-size=2048 -mdisable-fp-elim -relaxed-aliasing -fmath-errno -masm-verbose -no-integrated-as -mconstructor-aliases -fuse-init-array -mcode-model kernel -target-cpu x86-64 -target-feature -sse -target-feature -mmx -target-feature -sse2 -target-feature -3dnow -target-feature -avx -target-feature -x87 -target-feature +retpoline-external-thunk -disable-red-zone -dwarf-column-info -debug-info-kind=limited -dwarf-version=4 -debugger-tuning=gdb -coverage-notes-file /home/dwmw2/git/linux-2.6/drivers/usb/mon/mon_bin.gcno -nostdsysteminc -nobuiltininc -resource-dir /home/dwmw2/git/llvm-build/lib/clang/7.0.0 -dependency-file drivers/usb/mon/.mon_bin.o.d -MT drivers/usb/mon/mon_bin.o -sys-header-deps -isystem /home/dwmw2/git/llvm-build/lib/clang/7.0.0/include -include ./include/linux/kconfig.h -I ./arch/x86/include -I ./arch/x86/include/generated -I ./include -I ./arch/x86/include/uapi -I ./arch/x86/include/generated/uapi -I ./include/uapi -I ./include/generated/uapi -D __KERNEL__ -D CONFIG_AS_CFI=1 -D CONFIG_AS_CFI_SIGNAL_FRAME=1 -D CONFIG_AS_CFI_SECTIONS=1 -D CONFIG_AS_FXSAVEQ=1 -D CONFIG_AS_SSSE3=1 -D CONFIG_AS_CRC32=1 -D CONFIG_AS_AVX=1 -D CONFIG_AS_AVX2=1 -D CONFIG_AS_AVX512=1 -D CONFIG_AS_SHA1_NI=1 -D CONFIG_AS_SHA256_NI=1 -D RETPOLINE -D CC_USING_FENTRY -D KBUILD_BASENAME="mon_bin" -D KBUILD_MODNAME="usbmon" -O2 -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs -Werror-implicit-function-declaration -Wno-format-security -Wno-sign-compare -Wno-unused-variable -Wno-format-invalid-specifier -Wno-gnu -Wno-address-of-packed-member -Wno-tautological-compare -Wdeclaration-after-statement -Wno-pointer-sign -Werror=implicit-int -Werror=strict-prototypes -Werror=date-time -Werror=incompatible-pointer-types -Wno-initializer-overrides -Wno-unused-value -Wno-format -Wno-sign-compare -Wno-format-zero-length -Wno-uninitialized -std=gnu89 -fno-dwarf-directory-asm -fdebug-compilation-dir /home/dwmw2/git/linux-2.6 -ferror-limit 19 -fmessage-length 80 -pg -mfentry -fwrapv -stack-protector 2 -mstack-alignment=8 -fwchar-type=short -fno-signed-wchar -fobjc-runtime=gcc -fno-common -fdiagnostics-show-option -fcolor-diagnostics -vectorize-loops -vectorize-slp -o /tmp/mon_bin-8f9212.s -x c drivers/usb/mon/mon_bin.c 
1.	<eof> parser at end of file
2.	Per-module optimization passes
3.	Running pass 'CallGraph Pass Manager' on module 'drivers/usb/mon/mon_bin.c'.
4.	Running pass 'Loop Pass Manager' on function '@mon_bin_event'
5.	Running pass 'Induction Variable Simplification' on basic block '%while.body.i'
clang-7.0: error: unable to execute command: Aborted (core dumped)
clang-7.0: error: clang frontend command failed due to signal (use -v to see invocation)
clang version 7.0.0  (llvm/trunk 324455)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /home/dwmw2/git/llvm-build/bin
clang-7.0: 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-7.0: note: diagnostic msg: 
********************

PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:
Preprocessed source(s) and associated run script(s) are located at:
clang-7.0: note: diagnostic msg: /tmp/mon_bin-d51116.c
clang-7.0: note: diagnostic msg: /tmp/mon_bin-d51116.sh
clang-7.0: note: diagnostic msg: 

********************
make[3]: *** [scripts/Makefile.build:317: drivers/usb/mon/mon_bin.o] Error 254
make[3]: Target '__build' not remade because of errors.
make[2]: *** [scripts/Makefile.build:575: drivers/usb/mon] Error 2
make[2]: Target '__build' not remade because of errors.
make[1]: *** [scripts/Makefile.build:575: drivers/usb] Error 2
make[1]: Target '__build' not remade because of errors.
make: *** [Makefile:1018: drivers] Error 2
  CC      net/unix/af_unix.o
clang-7.0: /home/dwmw2/git/llvm/lib/Analysis/ScalarEvolution.cpp:9092: bool llvm::ScalarEvolution::isLoopEntryGuardedByCond(const llvm::Loop*, llvm::CmpInst::Predicate, const llvm::SCEV*, const llvm::SCEV*): Assertion `(!ProvedNonStrictComparison || !ProvedNonEquality) && "Why we were unable to prove (Pred, LHS, RHS) via constant ranges?"' failed.
#0 0x0000000003cdcc0e llvm::sys::PrintStackTrace(llvm::raw_ostream&) /home/dwmw2/git/llvm/lib/Support/Unix/Signals.inc:398:0
#1 0x0000000003cdcca1 PrintStackTraceSignalHandler(void*) /home/dwmw2/git/llvm/lib/Support/Unix/Signals.inc:462:0
#2 0x0000000003cdb146 llvm::sys::RunSignalHandlers() /home/dwmw2/git/llvm/lib/Support/Signals.cpp:49:0
#3 0x0000000003cdc583 SignalHandler(int) /home/dwmw2/git/llvm/lib/Support/Unix/Signals.inc:252:0
#4 0x00007fc4845a7a80 __restore_rt (/lib64/libpthread.so.0+0x12a80)
#5 0x00007fc4830a866b __GI_raise (/lib64/libc.so.6+0x3766b)
#6 0x00007fc4830aa381 __GI_abort (/lib64/libc.so.6+0x39381)
#7 0x00007fc4830a08fa __assert_fail_base (/lib64/libc.so.6+0x2f8fa)
#8 0x00007fc4830a0972 (/lib64/libc.so.6+0x2f972)
#9 0x0000000002f60e6b llvm::ScalarEvolution::isLoopEntryGuardedByCond(llvm::Loop const*, llvm::CmpInst::Predicate, llvm::SCEV const*, llvm::SCEV const*) /home/dwmw2/git/llvm/lib/Analysis/ScalarEvolution.cpp:9110:0
#10 0x0000000002f5f6d1 llvm::ScalarEvolution::isKnownPredicate(llvm::CmpInst::Predicate, llvm::SCEV const*, llvm::SCEV const*) /home/dwmw2/git/llvm/lib/Analysis/ScalarEvolution.cpp:8672:0
#11 0x0000000003a40edf (anonymous namespace)::WidenIV::pushNarrowIVUsers(llvm::Instruction*, llvm::Instruction*) /home/dwmw2/git/llvm/lib/Transforms/Scalar/IndVarSimplify.cpp:1510:0
#12 0x0000000003a415f4 (anonymous namespace)::WidenIV::createWideIV(llvm::SCEVExpander&) /home/dwmw2/git/llvm/lib/Transforms/Scalar/IndVarSimplify.cpp:1621:0
#13 0x0000000003a42464 (anonymous namespace)::IndVarSimplify::simplifyAndExtend(llvm::Loop*, llvm::SCEVExpander&, llvm::LoopInfo*) /home/dwmw2/git/llvm/lib/Transforms/Scalar/IndVarSimplify.cpp:1821:0
#14 0x0000000003a447db (anonymous namespace)::IndVarSimplify::run(llvm::Loop*) /home/dwmw2/git/llvm/lib/Transforms/Scalar/IndVarSimplify.cpp:2461:0
#15 0x0000000003a44f64 (anonymous namespace)::IndVarSimplifyLegacyPass::runOnLoop(llvm::Loop*, llvm::LPPassManager&) /home/dwmw2/git/llvm/lib/Transforms/Scalar/IndVarSimplify.cpp:2576:0
#16 0x0000000002ed44ff llvm::LPPassManager::runOnFunction(llvm::Function&) /home/dwmw2/git/llvm/lib/Analysis/LoopPass.cpp:204:0
#17 0x00000000035a1af1 llvm::FPPassManager::runOnFunction(llvm::Function&) /home/dwmw2/git/llvm/lib/IR/LegacyPassManager.cpp:1520:0
#18 0x0000000002e0311c (anonymous namespace)::CGPassManager::RunPassOnSCC(llvm::Pass*, llvm::CallGraphSCC&, llvm::CallGraph&, bool&, bool&) /home/dwmw2/git/llvm/lib/Analysis/CallGraphSCCPass.cpp:156:0
#19 0x0000000002e040a4 (anonymous namespace)::CGPassManager::RunAllPassesOnSCC(llvm::CallGraphSCC&, llvm::CallGraph&, bool&) /home/dwmw2/git/llvm/lib/Analysis/CallGraphSCCPass.cpp:423:0
#20 0x0000000002e043a5 (anonymous namespace)::CGPassManager::runOnModule(llvm::Module&) /home/dwmw2/git/llvm/lib/Analysis/CallGraphSCCPass.cpp:479:0
#21 0x00000000035a1fc3 (anonymous namespace)::MPPassManager::runOnModule(llvm::Module&) /home/dwmw2/git/llvm/lib/IR/LegacyPassManager.cpp:1597:0
#22 0x00000000035a2693 llvm::legacy::PassManagerImpl::run(llvm::Module&) /home/dwmw2/git/llvm/lib/IR/LegacyPassManager.cpp:1700:0
#23 0x00000000035a288b llvm::legacy::PassManager::run(llvm::Module&) /home/dwmw2/git/llvm/lib/IR/LegacyPassManager.cpp:1732:0
#24 0x0000000003f8b5d1 (anonymous namespace)::EmitAssemblyHelper::EmitAssembly(clang::BackendAction, std::unique_ptr<llvm::raw_pwrite_stream, std::default_delete<llvm::raw_pwrite_stream> >) /home/dwmw2/git/llvm/tools/clang/lib/CodeGen/BackendUtil.cpp:801:0
#25 0x0000000003f8df15 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/dwmw2/git/llvm/tools/clang/lib/CodeGen/BackendUtil.cpp:1180:0
#26 0x0000000004aec157 clang::BackendConsumer::HandleTranslationUnit(clang::ASTContext&) /home/dwmw2/git/llvm/tools/clang/lib/CodeGen/CodeGenAction.cpp:292:0
#27 0x00000000057fec75 clang::ParseAST(clang::Sema&, bool, bool) /home/dwmw2/git/llvm/tools/clang/lib/Parse/ParseAST.cpp:161:0
#28 0x00000000045f2b13 clang::ASTFrontendAction::ExecuteAction() /home/dwmw2/git/llvm/tools/clang/lib/Frontend/FrontendAction.cpp:1005:0
#29 0x0000000004aea206 clang::CodeGenAction::ExecuteAction() /home/dwmw2/git/llvm/tools/clang/lib/CodeGen/CodeGenAction.cpp:1032:0
#30 0x00000000045f256d clang::FrontendAction::Execute() /home/dwmw2/git/llvm/tools/clang/lib/Frontend/FrontendAction.cpp:908:0
#31 0x000000000459028f clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) /home/dwmw2/git/llvm/tools/clang/lib/Frontend/CompilerInstance.cpp:992:0
#32 0x0000000004734158 clang::ExecuteCompilerInvocation(clang::CompilerInstance*) /home/dwmw2/git/llvm/tools/clang/lib/FrontendTool/ExecuteCompilerInvocation.cpp:252:0
#33 0x0000000001c119a2 cc1_main(llvm::ArrayRef<char const*>, char const*, void*) /home/dwmw2/git/llvm/tools/clang/tools/driver/cc1_main.cpp:221:0
#34 0x0000000001c06f5d ExecuteCC1Tool(llvm::ArrayRef<char const*>, llvm::StringRef) /home/dwmw2/git/llvm/tools/clang/tools/driver/driver.cpp:309:0
#35 0x0000000001c07b94 main /home/dwmw2/git/llvm/tools/clang/tools/driver/driver.cpp:389:0
#36 0x00007fc48309200a __libc_start_main (/lib64/libc.so.6+0x2100a)
#37 0x0000000001c0480a _start (/home/dwmw2/git/llvm-build/bin/clang-7.0+0x1c0480a)
Stack dump:
0.	Program arguments: /home/dwmw2/git/llvm-build/bin/clang-7.0 -cc1 -triple x86_64-unknown-linux-gnu -S -disable-free -main-file-name af_unix.c -mrelocation-model static -mthread-model posix -mllvm -warn-stack-size=2048 -mdisable-fp-elim -relaxed-aliasing -fmath-errno -masm-verbose -no-integrated-as -mconstructor-aliases -fuse-init-array -mcode-model kernel -target-cpu x86-64 -target-feature -sse -target-feature -mmx -target-feature -sse2 -target-feature -3dnow -target-feature -avx -target-feature -x87 -target-feature +retpoline-external-thunk -disable-red-zone -dwarf-column-info -debug-info-kind=limited -dwarf-version=4 -debugger-tuning=gdb -coverage-notes-file /home/dwmw2/git/linux-2.6/net/unix/af_unix.gcno -nostdsysteminc -nobuiltininc -resource-dir /home/dwmw2/git/llvm-build/lib/clang/7.0.0 -dependency-file net/unix/.af_unix.o.d -MT net/unix/af_unix.o -sys-header-deps -isystem /home/dwmw2/git/llvm-build/lib/clang/7.0.0/include -include ./include/linux/kconfig.h -I ./arch/x86/include -I ./arch/x86/include/generated -I ./include -I ./arch/x86/include/uapi -I ./arch/x86/include/generated/uapi -I ./include/uapi -I ./include/generated/uapi -D __KERNEL__ -D CONFIG_AS_CFI=1 -D CONFIG_AS_CFI_SIGNAL_FRAME=1 -D CONFIG_AS_CFI_SECTIONS=1 -D CONFIG_AS_FXSAVEQ=1 -D CONFIG_AS_SSSE3=1 -D CONFIG_AS_CRC32=1 -D CONFIG_AS_AVX=1 -D CONFIG_AS_AVX2=1 -D CONFIG_AS_AVX512=1 -D CONFIG_AS_SHA1_NI=1 -D CONFIG_AS_SHA256_NI=1 -D RETPOLINE -D CC_USING_FENTRY -D KBUILD_BASENAME="af_unix" -D KBUILD_MODNAME="unix" -O2 -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs -Werror-implicit-function-declaration -Wno-format-security -Wno-sign-compare -Wno-unused-variable -Wno-format-invalid-specifier -Wno-gnu -Wno-address-of-packed-member -Wno-tautological-compare -Wdeclaration-after-statement -Wno-pointer-sign -Werror=implicit-int -Werror=strict-prototypes -Werror=date-time -Werror=incompatible-pointer-types -Wno-initializer-overrides -Wno-unused-value -Wno-format -Wno-sign-compare -Wno-format-zero-length -Wno-uninitialized -std=gnu89 -fno-dwarf-directory-asm -fdebug-compilation-dir /home/dwmw2/git/linux-2.6 -ferror-limit 19 -fmessage-length 80 -pg -mfentry -fwrapv -stack-protector 2 -mstack-alignment=8 -fwchar-type=short -fno-signed-wchar -fobjc-runtime=gcc -fno-common -fdiagnostics-show-option -fcolor-diagnostics -vectorize-loops -vectorize-slp -o /tmp/af_unix-5c03bf.s -x c net/unix/af_unix.c 
1.	<eof> parser at end of file
2.	Per-module optimization passes
3.	Running pass 'CallGraph Pass Manager' on module 'net/unix/af_unix.c'.
4.	Running pass 'Loop Pass Manager' on function '@unix_seq_show'
5.	Running pass 'Induction Variable Simplification' on basic block '%for.body'
clang-7.0: error: unable to execute command: Aborted (core dumped)
clang-7.0: error: clang frontend command failed due to signal (use -v to see invocation)
clang version 7.0.0  (llvm/trunk 324455)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /home/dwmw2/git/llvm-build/bin
clang-7.0: 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-7.0: note: diagnostic msg: 
********************

PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:
Preprocessed source(s) and associated run script(s) are located at:
clang-7.0: note: diagnostic msg: /tmp/af_unix-307390.c
clang-7.0: note: diagnostic msg: /tmp/af_unix-307390.sh
clang-7.0: note: diagnostic msg: 

********************
make[2]: *** [scripts/Makefile.build:317: net/unix/af_unix.o] Error 254
make[2]: Target '__build' not remade because of errors.
make[1]: *** [scripts/Makefile.build:575: net/unix] Error 2
make[1]: Target '__build' not remade because of errors.
make: *** [Makefile:1018: net] Error 2
make: Target 'vmlinux' not remade because of errors.
]0;dwoodhou at i7:~/git/linux-2.6[dwoodhou at i7 linux-2.6]$ exit

Script done on 2018-02-07 10:40:16+0000
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