[llvm-dev] Linker error while building a new back end in the latest LLVM from GitHub
Alex Susu via llvm-dev
llvm-dev at lists.llvm.org
Tue Feb 9 05:51:25 PST 2021
Hello.
I solved this last runtime error. TargetInstrInfo::copyPhysReg() has changed the
method prototype. Before it was:
void copyPhysReg(MachineBasicBlock &MBB,
MachineBasicBlock::iterator I, const DebugLoc &DL,
unsigned DestReg, unsigned SrcReg,
bool KillSrc) const override;
In the last version of LLVM from GitHub, they changed:
unsigned DestReg, unsigned SrcReg
to:
MCRegister DestReg, MCRegister SrcReg .
There was also the override keyword but I took it out without noticing the method
prototype changed...
After updating the method prototype everything now works.
Best regards,
Alex
On 2/9/2021 1:33 PM, Alex Susu wrote:
> Hello.
> I would like to inform that I managed to solve the problem mentioned here and to
> build LLVM today.
> What I had to do was to add (uncomment) in the lib/Target/Connex/CMakeLists.txt (my
> main back end CMakeLists file), in the section LINK_COMPONENTS the following 2 lines:
> Analysis
> TransformUtils
>
> I got inspired a bit from the XCore back end's main CMakeLists.txt since my back
> end's ConnexTargetTransformInfo.h is inspired from XCore.
>
> If ever, you can find the corrected CMakeLists.txt at
> https://sites.google.com/site/alexsusu/myfilecabinet/Connex_be.zip .
>
>
> However, I still have issues. While running llc I get the following error:
> ********** EXPANDING POST-RA PSEUDO INSTRS **********
> ********** Function: MatMul_BTransposed
> real copy: $r5 = COPY $r0
> Target didn't implement TargetInstrInfo::copyPhysReg!
> UNREACHABLE executed at
> /home/asusu/LLVM/llvm2021_01_23/llvm-project/llvm/include/llvm/CodeGen/TargetInstrInfo.h:951!
> ...
> #8 0x00007fce772ce4b6 llvm::TargetInstrInfo::isCopyInstrImpl(llvm::MachineInstr
> const&) const
> /home/asusu/LLVM/llvm2021_01_23/llvm-project/llvm/include/llvm/CodeGen/TargetInstrInfo.h:960:3
>
> #9 0x00007fce712082c8 (anonymous
> namespace)::ExpandPostRA::LowerCopy(llvm::MachineInstr*)
> /home/asusu/LLVM/llvm2021_01_23/llvm-project/llvm/lib/CodeGen/ExpandPostRAPseudos.cpp:166:19
> #10 0x00007fce71208611 (anonymous
> namespace)::ExpandPostRA::runOnMachineFunction(llvm::MachineFunction&)
> /home/asusu/LLVM/llvm2021_01_23/llvm-project/llvm/lib/CodeGen/ExpandPostRAPseudos.cpp:215:20
> ...
> #17 0x00005560165771f7 compileModule(char**, llvm::LLVMContext&)
> /home/asusu/LLVM/llvm2021_01_23/llvm-project/llvm/tools/llc/llc.cpp:661:66
>
>
> But actually I did implement TargetInstrInfo::copyPhysReg() in ConnexInstrInfo.cpp in
> my back end (you can see my back end code at
> https://sites.google.com/site/alexsusu/myfilecabinet/Connex_be.zip).
>
> Can somebody help me with this new llc runtime error that just appeared? (It looks
> like llc does not load the object file of ConnexInstrInfo.cpp, so it might be a hidden
> linker issue).
>
> Thank you very much,
> Alex
>
>
>
> On 2/6/2021 7:26 PM, Alex Susu wrote:
>> Hello.
>> I would like to come back to this message.
>> It seems the reason of these linker errors are some changes performed in LLVM
>> itself in the last 2 years, since I am able to run my back end in an older LLVM build
>> downloaded from the source repository in Mar 2019. I apologize for being a bit in the
>> haze - I didn't follow closely the changes performed to LLVM lately.
>>
>> If interested please find my main CMakeLists.txt for my Connex LLVM back end:
>> add_llvm_component_group(Connex)
>>
>> set(LLVM_TARGET_DEFINITIONS Connex.td)
>>
>> tablegen(LLVM ConnexGenRegisterInfo.inc -gen-register-info)
>> tablegen(LLVM ConnexGenInstrInfo.inc -gen-instr-info)
>> tablegen(LLVM ConnexGenAsmWriter.inc -gen-asm-writer)
>> tablegen(LLVM ConnexGenAsmMatcher.inc -gen-asm-matcher)
>> tablegen(LLVM ConnexGenDAGISel.inc -gen-dag-isel)
>> tablegen(LLVM ConnexGenMCCodeEmitter.inc -gen-emitter)
>> tablegen(LLVM ConnexGenCallingConv.inc -gen-callingconv)
>> tablegen(LLVM ConnexGenSubtargetInfo.inc -gen-subtarget)
>> add_public_tablegen_target(ConnexCommonTableGen)
>>
>> add_llvm_target(ConnexCodeGen
>> ConnexAsmPrinter.cpp
>> ConnexFrameLowering.cpp
>> ConnexHazardRecognizer.cpp
>> # ConnexHazardRecognizerPreRAScheduler.cpp
>> ConnexInstrInfo.cpp
>> ConnexISelDAGToDAG.cpp
>> ConnexISelLowering.cpp
>> ConnexMCInstLower.cpp
>> ConnexRegisterInfo.cpp
>> ConnexSelectionDAGInfo.cpp
>> ConnexSubtarget.cpp
>> ConnexTargetMachine.cpp
>>
>> LINK_COMPONENTS
>> #Analysis
>> AsmPrinter
>> CodeGen
>> Core
>> ConnexDesc
>> ConnexInfo
>> MC
>> SelectionDAG
>> Support
>> Target
>> #TransformUtils
>>
>> ADD_TO_COMPONENT
>> Connex
>> )
>>
>> #add_subdirectory(AsmParser) # 2021_01
>> #add_subdirectory(InstPrinter)
>> #add_subdirectory(Disassembler)
>> add_subdirectory(MCTargetDesc)
>> add_subdirectory(TargetInfo)
>>
>>
>> Please keep in mind that the source files of my Connex LLVM back
>> end are in a ZIP archive at this address:
>> https://sites.google.com/site/alexsusu/myfilecabinet/Connex_be.zip .
>>
>>
>> Thank you very much,
>> Alex
>>
>>
>> On 2/3/2021 11:43 PM, Alex Susu wrote:
>>> Hello.
>>> I am trying to build against the latest LLVM source from GitHub (from Jan 23 2021)
>>> my Connex processor back end, which is mostly inspired from the BPF and Mips back end.
>>> I did my best to correct all the errors that appeared, but I now get a rather
>>> strange linker error that I don't know exactly how to solve (maybe somebody is more
>>> experienced than me on this). Maybe I have an error in lib/Target/Connex/CMakeLists.txt.
>>>
>>> The error I get while building LLVM is:
>>> <<cd /home/asusu/LLVM/llvm2021_01_23/llvm-project/build/lib/Target/Connex &&
>>> /usr/bin/cmake -E cmake_link_script CMakeFiles/LLVMConnexCodeGen.dir/link.txt --verbose=1
>>> /usr/bin/c++ -fPIC -fPIC -fvisibility-inlines-hidden -Werror=date-time -Wall
>>> -Wextra -Wno-unused-parameter -Wwrite-strings -Wcast-qual
>>> -Wno-missing-field-initializers -pedantic -Wno-long-long -Wimplicit-fallthrough
>>> -Wno-maybe-uninitialized -Wno-class-memaccess -Wno-redundant-move -Wno-noexcept-type
>>> -Wdelete-non-virtual-dtor -Wsuggest-override -Wno-comment -g
>>> -Wl,-rpath-link,/home/asusu/LLVM/llvm2021_01_23/llvm-project/build/./lib
>>> -Wl,-z,defs -Wl,-z,nodelete -shared -Wl,-soname,libLLVMConnexCodeGen.so.12git -o
>>> ../../libLLVMConnexCodeGen.so.12git
>>> CMakeFiles/LLVMConnexCodeGen.dir/ConnexAsmPrinter.cpp.o
>>> CMakeFiles/LLVMConnexCodeGen.dir/ConnexFrameLowering.cpp.o
>>> CMakeFiles/LLVMConnexCodeGen.dir/ConnexHazardRecognizer.cpp.o
>>> CMakeFiles/LLVMConnexCodeGen.dir/ConnexInstrInfo.cpp.o
>>> CMakeFiles/LLVMConnexCodeGen.dir/ConnexISelDAGToDAG.cpp.o
>>> CMakeFiles/LLVMConnexCodeGen.dir/ConnexISelLowering.cpp.o
>>> CMakeFiles/LLVMConnexCodeGen.dir/ConnexMCInstLower.cpp.o
>>> CMakeFiles/LLVMConnexCodeGen.dir/ConnexRegisterInfo.cpp.o
>>> CMakeFiles/LLVMConnexCodeGen.dir/ConnexSelectionDAGInfo.cpp.o
>>> CMakeFiles/LLVMConnexCodeGen.dir/ConnexSubtarget.cpp.o
>>> CMakeFiles/LLVMConnexCodeGen.dir/ConnexTargetMachine.cpp.o
>>> -Wl,-rpath,"\$ORIGIN/../lib" ../../libLLVMAsmPrinter.so.12git
>>> ../../libLLVMConnexDesc.so.12git ../../libLLVMConnexInfo.so.12git
>>> ../../libLLVMSelectionDAG.so.12git ../../libLLVMCodeGen.so.12git
>>> ../../libLLVMTarget.so.12git ../../libLLVMMC.so.12git ../../libLLVMCore.so.12git
>>> ../../libLLVMSupport.so.12git
>>> -Wl,-rpath-link,/home/asusu/LLVM/llvm2021_01_23/llvm-project/build/lib
>>> /usr/bin/ld: CMakeFiles/LLVMConnexCodeGen.dir/ConnexTargetMachine.cpp.o: in
>>> function `llvm::TargetTransformInfo::Model<llvm::ConnexTTIImpl>::~Model()':
>>> /home/asusu/LLVM/llvm2021_01_23/llvm-project/llvm/include/llvm/Analysis/TargetTransformInfo.h:1672:
>>> undefined reference to `llvm::TargetTransformInfo::Concept::~Concept()'
>>> /usr/bin/ld: CMakeFiles/LLVMConnexCodeGen.dir/ConnexTargetMachine.cpp.o: in
>>> function
>>> `llvm::TargetTransformInfoImplCRTPBase<llvm::ConnexTTIImpl>::getUserCost(llvm::User
>>> const*, llvm::ArrayRef<llvm::Value const*>, llvm::TargetTransformInfo::TargetCostKind)':
>>> /home/asusu/LLVM/llvm2021_01_23/llvm-project/llvm/include/llvm/Analysis/TargetTransformInfoImpl.h:911:
>>> undefined reference to `llvm::IntrinsicCostAttributes::IntrinsicCostAttributes(unsigned
>>> int, llvm::CallBase const&)'
>>> /usr/bin/ld:
>>> /home/asusu/LLVM/llvm2021_01_23/llvm-project/llvm/include/llvm/Analysis/TargetTransformInfoImpl.h:953:
>>> undefined reference to `llvm::TargetTransformInfo::getOperandInfo(llvm::Value const*,
>>> llvm::TargetTransformInfo::OperandValueProperties&)'
>>> ...
>>> ...
>>> /usr/bin/ld:
>>> /home/asusu/LLVM/llvm2021_01_23/llvm-project/llvm/include/llvm/CodeGen/BasicTTIImpl.h:1805:
>>> undefined reference to `llvm::IntrinsicCostAttributes::IntrinsicCostAttributes(unsigned
>>> int, llvm::Type*, llvm::ArrayRef<llvm::Type*>)'
>>> /usr/bin/ld:
>>> /home/asusu/LLVM/llvm2021_01_23/llvm-project/llvm/include/llvm/CodeGen/BasicTTIImpl.h:1826:
>>> undefined reference to `llvm::IntrinsicCostAttributes::IntrinsicCostAttributes(unsigned
>>> int, llvm::Type*, llvm::ArrayRef<llvm::Type*>, llvm::FastMathFlags)'
>>> collect2: error: ld returned 1 exit status>>
>>>
>>>
>>> Please find if you have the time also most of the source files of my Connex LLVM
>>> back end in the ZIP archive at this address:
>>> https://sites.google.com/site/alexsusu/myfilecabinet/Connex_be.zip (please note the
>>> file ERROR_LINKER.txt contains the above mentioned linker error).
>>> Please let me know if you want me to provide any further information about my build.
>>>
>>> Thank you very much,
>>> Alex
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