[LLVMdev] What does this error mean: psuedo instructions should be removed before code emission?

[Yuri]

On 08/27/2010 11:32, Yuri wrote:
> As I understand only one of TCRETURNri64 and RET should be created.
> I have sources of rev.112200.
>
> Here is the stack when TCRETURNri64 instruction is created:
> #1  0x0000000802c8b4e2 in llvm::MachineFunction::CreateMachineInstr
> (this=0x30eb000, TID=@0x803a78940, DL={LineCol = 0, ScopeIdx = 0},
> NoImp=false) at /tmp/llvm-svn/llvm/lib/CodeGen/MachineFunction.cpp:153
> #2  0x00000008028ea45b in llvm::BuildMI (BB=@0x4b69378,
> I={<std::iterator<std::bidirectional_iterator_tag, llvm::MachineInstr,
> long int, llvm::MachineInstr*, llvm::MachineInstr&>>  = {<No data
> fields>}, NodePtr = 0x4b69440}, DL={LineCol = 0, ScopeIdx = 0},
> TID=@0x803a78940) at MachineInstrBuilder.h:183
> #3  0x0000000803451825 in llvm::X86RegisterInfo::emitPrologue
> (this=0x1a96220, MF=@0x30eb000) at
> /tmp/llvm-svn/llvm/lib/Target/X86/X86RegisterInfo.cpp:1037
> #4  0x0000000802cdf3e5 in llvm::PEI::insertPrologEpilogCode
> (this=0x3231900, Fn=@0x30eb000) at
> /tmp/llvm-svn/llvm/lib/CodeGen/PrologEpilogInserter.cpp:680
> #5  0x0000000802cdcf04 in llvm::PEI::runOnMachineFunction
> (this=0x3231900, Fn=@0x30eb000) at
> /tmp/llvm-svn/llvm/lib/CodeGen/PrologEpilogInserter.cpp:106
> #6  0x0000000802c92abd in llvm::MachineFunctionPass::runOnFunction
> (this=0x3231900, F=@0x4530c60) at
> /tmp/llvm-svn/llvm/lib/CodeGen/MachineFunctionPass.cpp:33
> #7  0x0000000802e76e77 in llvm::FPPassManager::runOnFunction
> (this=0x235e540, F=@0x4530c60) at
> /tmp/llvm-svn/llvm/lib/VMCore/PassManager.cpp:1443
> #8  0x0000000802e76b3f in llvm::FunctionPassManagerImpl::run
> (this=0x1e1a300, F=@0x4530c60) at
> /tmp/llvm-svn/llvm/lib/VMCore/PassManager.cpp:1394
> #9  0x0000000802e767ef in llvm::FunctionPassManager::run
> (this=0x4b566c0, F=@0x4530c60) at
> /tmp/llvm-svn/llvm/lib/VMCore/PassManager.cpp:1324
> #10 0x0000000802f50500 in llvm::JIT::jitTheFunction (this=0x327a7e0,
> F=0x4530c60, locked=@0x7fffffff9840) at
> /tmp/llvm-svn/llvm/lib/ExecutionEngine/JIT/JIT.cpp:655
> #11 0x0000000802f5037b in llvm::JIT::runJITOnFunctionUnlocked
> (this=0x327a7e0, F=0x4530c60, locked=@0x7fffffff9840) at
> /tmp/llvm-svn/llvm/lib/ExecutionEngine/JIT/JIT.cpp:633
> #12 0x0000000802f507e4 in llvm::JIT::getPointerToFunction
> (this=0x327a7e0, F=0x4530c60) at
> /tmp/llvm-svn/llvm/lib/ExecutionEngine/JIT/JIT.cpp:719
>
>
> Here is the stack when RET instruction is created:
> #1  0x0000000802c8b4e2 in llvm::MachineFunction::CreateMachineInstr
> (this=0x30eb000, TID=@0x803a99240, DL={LineCol = 0, ScopeIdx = 0},
> NoImp=false) at /tmp/llvm-svn/llvm/lib/CodeGen/MachineFunction.cpp:153
> #2  0x00000008028ea45b in llvm::BuildMI (BB=@0x4b69378,
> I={<std::iterator<std::bidirectional_iterator_tag, llvm::MachineInstr,
> long int, llvm::MachineInstr*, llvm::MachineInstr&>>  = {<No data
> fields>}, NodePtr = 0x4b69388}, DL={LineCol = 0, ScopeIdx = 0},
> TID=@0x803a99240) at MachineInstrBuilder.h:183
> #3  0x00000008033c7637 in X86SelectRet (this=0x4530bd0, I=0x493fae0) at
> /tmp/llvm-svn/llvm/lib/Target/X86/X86FastISel.cpp:771
> #4  0x00000008033cc4fc in TargetSelectInstruction (this=0x4530bd0,
> I=0x493fae0) at /tmp/llvm-svn/llvm/lib/Target/X86/X86FastISel.cpp:1783
> #5  0x000000080315a64f in llvm::FastISel::SelectInstruction
> (this=0x4530bd0, I=0x493fae0) at
> /tmp/llvm-svn/llvm/lib/CodeGen/SelectionDAG/FastISel.cpp:706
> #6  0x0000000803275ee0 in llvm::SelectionDAGISel::SelectAllBasicBlocks
> (this=0x45174d0, Fn=@0x4530c60) at
> /tmp/llvm-svn/llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp:726
> #7  0x00000008032737f7 in llvm::SelectionDAGISel::runOnMachineFunction
> (this=0x45174d0, mf=@0x30eb000) at
> /tmp/llvm-svn/llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp:252
> #8  0x0000000802c92abd in llvm::MachineFunctionPass::runOnFunction
> (this=0x45174d0, F=@0x4530c60) at
> /tmp/llvm-svn/llvm/lib/CodeGen/MachineFunctionPass.cpp:33
> #9  0x0000000802e76e77 in llvm::FPPassManager::runOnFunction
> (this=0x235e540, F=@0x4530c60) at
> /tmp/llvm-svn/llvm/lib/VMCore/PassManager.cpp:1443
> #10 0x0000000802e76b3f in llvm::FunctionPassManagerImpl::run
> (this=0x1e1a300, F=@0x4530c60) at
> /tmp/llvm-svn/llvm/lib/VMCore/PassManager.cpp:1394
> #11 0x0000000802e767ef in llvm::FunctionPassManager::run
> (this=0x4b566c0, F=@0x4530c60) at
> /tmp/llvm-svn/llvm/lib/VMCore/PassManager.cpp:1324
> #12 0x0000000802f50500 in llvm::JIT::jitTheFunction (this=0x327a7e0,
> F=0x4530c60, locked=@0x7fffffff9840) at
> /tmp/llvm-svn/llvm/lib/ExecutionEngine/JIT/JIT.cpp:655
> #13 0x0000000802f5037b in llvm::JIT::runJITOnFunctionUnlocked
> (this=0x327a7e0, F=0x4530c60, locked=@0x7fffffff9840) at
> /tmp/llvm-svn/llvm/lib/ExecutionEngine/JIT/JIT.cpp:633
> #14 0x0000000802f507e4 in llvm::JIT::getPointerToFunction
> (this=0x327a7e0, F=0x4530c60) at
> /tmp/llvm-svn/llvm/lib/ExecutionEngine/JIT/JIT.cpp:719
> ....my code....


It seems wrong that TCRETURNri64 is created in 
X86RegisterInfo::emitPrologue even when RET instruction is already 
there. This seems to be a bug.

Yuri