[Llvm-bgq-discuss] cnk syscalls

Wed Jan 2 13:41:14 CST 2013

----- Original Message -----
> From: "Michael Blocksome" <blocksom at us.ibm.com>
> To: "Hal Finkel" <hfinkel at anl.gov>
> Cc: llvm-bgq-discuss at lists.alcf.anl.gov
> Sent: Wednesday, January 2, 2013 1:32:59 PM
> Subject: Re: [Llvm-bgq-discuss] cnk syscalls
> 
> Jeff ... thanks for the suggestion. The workaround seems to work just
> fine, so I am "un-stuck" again.
> 
> Hal ... thanks for looking into this bug. I don't have any urgent
> need for the fix though, so whenever it happens is just fine with
> me. :)

Actually, there is another work-around: compile with optimizations. You're hitting a bug in the fast register allocator, and that is only used at -O0. Nevertheless, I'll try to get this resolved.

 -Hal

> 
> Thanks again!
> 
> Michael Blocksome
> Blue Gene Messaging
> blocksom at us.ibm.com
> 
> 
> 
> 
> From: Hal Finkel <hfinkel at anl.gov>
> To: Michael Blocksome/Rochester/IBM at IBMUS,
> Cc: llvm-bgq-discuss at lists.alcf.anl.gov
> Date: 01/02/2013 01:15 PM
> Subject: Re: [Llvm-bgq-discuss] cnk syscalls
> 
> 
> 
> 
> ----- Original Message -----
> > From: "Michael Blocksome" <blocksom at us.ibm.com>
> > To: llvm-bgq-discuss at lists.alcf.anl.gov
> > Sent: Wednesday, January 2, 2013 12:17:37 PM
> > Subject: [Llvm-bgq-discuss] cnk syscalls
> > 
> > 
> > All,
> > 
> > I've encountered an ICE with clang built from the recent updates
> > (thanks!) when I attempt to use certain CNK syscalls. Has anyone
> > else seen this? Is there a workaround?
> 
> Interesting, thanks! I'll get this fixed. I don't have a better
> workaround than what Jeff suggested (compile this file with gcc).
> 
> -Hal
> 
> > 
> > Here's my code and the clang output:
> > 
> > ====
> > 
> > .../test> cat personality_ice.cc
> > 
> > #include <kernel/location.h>
> > 
> > int main ()
> > {
> > Personality_t personality;
> > Kernel_GetPersonality(&personality, sizeof(Personality_t));
> > 
> > return 0;
> > };
> > 
> > .../test> /bghome/blocksom/development/llvm/bgclang++
> > -ferror-limit=10 -I../include -I /bgsys/drivers/ppcfloor -I
> > /bgsys/drivers/ppcfloor/spi/include -I
> > /bgsys/drivers/ppcfloor/spi/include/kernel/cnk -std=c++11
> > -stdlib=libc++ -fno-exceptions -v -c personality_ice.cc -o
> > personality_ice.o
> > clang version 3.3 (trunk 170456)
> > Target: powerpc64-bgq-linux
> > Thread model: posix
> > "/bghome/blocksom/development/llvm/install/bin/clang" -cc1 -triple
> > powerpc64-bgq-linux -S -disable-free -main-file-name
> > personality_ice.cc -static-define -mrelocation-model static
> > -mdisable-fp-elim -fmath-errno -ffp-contract=fast
> > -mconstructor-aliases -target-cpu a2q -target-linker-version
> > 2.20.51.0.2 -momit-leaf-frame-pointer -v -coverage-file
> > /tmp/personality_ice-m3wqVS.s -resource-dir
> > /bghome/blocksom/development/llvm/install/bin/../lib/clang/3.3 -I
> > ../include -I /bgsys/drivers/ppcfloor -I
> > /bgsys/drivers/ppcfloor/spi/include -I
> > /bgsys/drivers/ppcfloor/spi/include/kernel/cnk -fmodule-cache-path
> > /var/tmp/clang-module-cache -internal-isystem /usr/include/c++/v1
> > -internal-isystem /usr/local/include -internal-isystem
> > /bghome/blocksom/development/llvm/install/bin/../lib/clang/3.3/include
> > -internal-externc-isystem /include -internal-externc-isystem
> > /usr/include -std=c++11 -fdeprecated-macro -fno-dwarf-directory-asm
> > -fdebug-compilation-dir
> > /bghome/blocksom/development/boost-pami/next/test -ferror-limit 10
> > -fmessage-length 231 -mstackrealign -fno-signed-char
> > -fobjc-runtime=gcc -fdiagnostics-show-option -fcolor-diagnostics
> > -isystem /bghome/blocksom/development/llvm/install/libc++/include
> > -isystem
> > /bgsys/drivers/ppcfloor/gnu-linux/powerpc64-bgq-linux/include/c++/4.4.6
> > -isystem
> > /bgsys/drivers/ppcfloor/gnu-linux/powerpc64-bgq-linux/include/c++/4.4.6/powerpc64-bgq-linux
> > -isystem
> > /bgsys/drivers/ppcfloor/gnu-linux/powerpc64-bgq-linux/sys-include
> > -mllvm -enable-misched -mllvm -enable-aa-sched-mi -mllvm
> > -ilp-window=0 -o /tmp/personality_ice-m3wqVS.s -x c++
> > personality_ice.cc
> > clang -cc1 version 3.3 based upon LLVM 3.3svn default target
> > powerpc64-unknown-linux-gnu
> > ignoring nonexistent directory "/usr/include/c++/v1"
> > ignoring nonexistent directory "/include"
> > #include "..." search starts here:
> > #include <...> search starts here:
> > ../include
> > /bgsys/drivers/ppcfloor
> > /bgsys/drivers/ppcfloor/spi/include
> > /bgsys/drivers/ppcfloor/spi/include/kernel/cnk
> > /bghome/blocksom/development/llvm/install/libc++/include
> > /bgsys/drivers/ppcfloor/gnu-linux/powerpc64-bgq-linux/include/c++/4.4.6
> > /bgsys/drivers/ppcfloor/gnu-linux/powerpc64-bgq-linux/include/c++/4.4.6/powerpc64-bgq-linux
> > /bgsys/drivers/ppcfloor/gnu-linux/powerpc64-bgq-linux/sys-include
> > /usr/local/include
> > /bghome/blocksom/development/llvm/install/bin/../lib/clang/3.3/include
> > /usr/include
> > End of search list.
> > Instruction uses an allocated register
> > UNREACHABLE executed at
> > /bghome/blocksom/development/llvm/src/lib/CodeGen/RegAllocFast.cpp:351!
> > 0 clang 0x0000000011f55b1c
> > 1 clang 0x0000000011f56924
> > 2 0x00000fff962e0418 __kernel_sigtramp_rt64 + 0
> > 3 libc.so.6 0x00000080dbd86ef8 abort + 18446744073708064168
> > 4 clang 0x0000000011f38df4 llvm::llvm_unreachable_internal(char
> > const*, char const*, unsigned int) + 18446744073696340212
> > 5 clang 0x00000000118fa8c4
> > 6 clang 0x00000000118fb77c
> > 7 clang 0x000000001189498c
> > llvm::MachineFunctionPass::runOnFunction(llvm::Function&) +
> > 18446744073689552652
> > 8 clang 0x0000000011edaa98
> > llvm::FPPassManager::runOnFunction(llvm::Function&) +
> > 18446744073695968280
> > 9 clang 0x0000000011edabdc
> > llvm::FPPassManager::runOnModule(llvm::Module&) +
> > 18446744073695968588
> > 10 clang 0x0000000011eda60c
> > llvm::MPPassManager::runOnModule(llvm::Module&) +
> > 18446744073695967132
> > 11 clang 0x0000000011edbf64
> > llvm::PassManagerImpl::run(llvm::Module&)
> > + 18446744073695973428
> > 12 clang 0x0000000011edc074 llvm::PassManager::run(llvm::Module&) +
> > 18446744073695973684
> > 13 clang 0x000000001044851c
> > clang::EmitBackendOutput(clang::DiagnosticsEngine&,
> > clang::CodeGenOptions const&, clang::TargetOptions const&,
> > clang::LangOptions const&, llvm::Module*, clang::BackendAction,
> > llvm::raw_ostream*) + 18446744073668788412
> > 14 clang 0x00000000104453f4
> > 15 clang 0x00000000105db3d0 clang::ParseAST(clang::Sema&, bool,
> > bool)
> > + 18446744073670399680
> > 16 clang 0x00000000102a0b50
> > clang::ASTFrontendAction::ExecuteAction()
> > + 18446744073667099648
> > 17 clang 0x0000000010443028 clang::CodeGenAction::ExecuteAction() +
> > 18446744073668767224
> > 18 clang 0x00000000102a1024 clang::FrontendAction::Execute() +
> > 18446744073667100756
> > 19 clang 0x000000001027ed64
> > clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) +
> > 18446744073666962340
> > 20 clang 0x000000001025f704
> > clang::ExecuteCompilerInvocation(clang::CompilerInstance*) +
> > 18446744073666839428
> > 21 clang 0x0000000010255998 cc1_main(char const**, char const**,
> > char
> > const*, void*) + 18446744073666799576
> > 22 clang 0x000000001025daf0 main + 18446744073666832256
> > 23 libc.so.6 0x00000080dbd6bcf8
> > 24 libc.so.6 0x00000080dbd6bef0 __libc_start_main +
> > 18446744073707958816
> > Stack dump:
> > 0. Program arguments:
> > /bghome/blocksom/development/llvm/install/bin/clang -cc1 -triple
> > powerpc64-bgq-linux -S -disable-free -main-file-name
> > personality_ice.cc -static-define -mrelocation-model static
> > -mdisable-fp-elim -fmath-errno -ffp-contract=fast
> > -mconstructor-aliases -target-cpu a2q -target-linker-version
> > 2.20.51.0.2 -momit-leaf-frame-pointer -v -coverage-file
> > /tmp/personality_ice-m3wqVS.s -resource-dir
> > /bghome/blocksom/development/llvm/install/bin/../lib/clang/3.3 -I
> > ../include -I /bgsys/drivers/ppcfloor -I
> > /bgsys/drivers/ppcfloor/spi/include -I
> > /bgsys/drivers/ppcfloor/spi/include/kernel/cnk -fmodule-cache-path
> > /var/tmp/clang-module-cache -internal-isystem /usr/include/c++/v1
> > -internal-isystem /usr/local/include -internal-isystem
> > /bghome/blocksom/development/llvm/install/bin/../lib/clang/3.3/include
> > -internal-externc-isystem /include -internal-externc-isystem
> > /usr/include -std=c++11 -fdeprecated-macro -fno-dwarf-directory-asm
> > -fdebug-compilation-dir
> > /bghome/blocksom/development/boost-pami/next/test -ferror-limit 10
> > -fmessage-length 231 -mstackrealign -fno-signed-char
> > -fobjc-runtime=gcc -fdiagnostics-show-option -fcolor-diagnostics
> > -isystem /bghome/blocksom/development/llvm/install/libc++/include
> > -isystem
> > /bgsys/drivers/ppcfloor/gnu-linux/powerpc64-bgq-linux/include/c++/4.4.6
> > -isystem
> > /bgsys/drivers/ppcfloor/gnu-linux/powerpc64-bgq-linux/include/c++/4.4.6/powerpc64-bgq-linux
> > -isystem
> > /bgsys/drivers/ppcfloor/gnu-linux/powerpc64-bgq-linux/sys-include
> > -mllvm -enable-misched -mllvm -enable-aa-sched-mi -mllvm
> > -ilp-window=0 -o /tmp/personality_ice-m3wqVS.s -x c++
> > personality_ice.cc
> > 1. <eof> parser at end of file
> > 2. Code generation
> > 3. Running pass 'Function Pass Manager' on module
> > 'personality_ice.cc'.
> > 4. Running pass 'Fast Register Allocator' on function '@main'
> > clang: error: unable to execute command: Aborted (core dumped)
> > clang: error: clang frontend command failed due to signal (use -v
> > to
> > see invocation)
> > clang version 3.3 (trunk 170456)
> > Target: powerpc64-bgq-linux
> > Thread model: posix
> > clang: note: diagnostic msg: PLEASE submit a bug report to
> > http://llvm.org/bugs/ and include the crash backtrace, preprocessed
> > source, and associated run script.
> > clang: note: diagnostic msg:
> > ********************
> > 
> > PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:
> > Preprocessed source(s) and associated run script(s) are located at:
> > clang: note: diagnostic msg: /tmp/personality_ice-hApwmA.cpp
> > clang: note: diagnostic msg: /tmp/personality_ice-hApwmA.sh
> > clang: note: diagnostic msg:
> > 
> > ********************
> > 
> > ====
> > 
> > Thanks,
> > Michael Blocksome
> > 
> > _______________________________________________
> > llvm-bgq-discuss mailing list
> > llvm-bgq-discuss at lists.alcf.anl.gov
> > https://lists.alcf.anl.gov/mailman/listinfo/llvm-bgq-discuss
> > 
> 
> --
> Hal Finkel
> Postdoctoral Appointee
> Leadership Computing Facility
> Argonne National Laboratory
> 
> 
> 

-- 
Hal Finkel
Postdoctoral Appointee
Leadership Computing Facility
Argonne National Laboratory