auto-win-gnu-32-opt bot is failing llvm build on MIPS header file

[pnkfelix]

bors blocked because auto-win-gnu-32-opt bot is failing llvm build on MIPS header file

Pull Requests that have failed due to this:
#30352
#30468
#30469
#30482
#30486
#30413
#30461
#30473

Sample Error Message:

make[4]: Entering directory '/c/bot/slave/auto-win-gnu-32-opt/build/obj/i686-pc-windows-gnu/llvm/lib/Target/Mips'
llvm[4]: Compiling Mips16FrameLowering.cpp for Release build
In file included from C:/bot/slave/auto-win-gnu-32-opt/build/src/llvm/lib/Target/Mips/MCTargetDesc/MipsMCTargetDesc.h:74:0,
                 from C:/bot/slave/auto-win-gnu-32-opt/build/src/llvm/lib/Target/Mips/Mips.h:18,
                 from C:/bot/slave/auto-win-gnu-32-opt/build/src/llvm/lib/Target/Mips/MipsFrameLowering.h:17,
                 from C:/bot/slave/auto-win-gnu-32-opt/build/src/llvm/lib/Target/Mips/Mips16FrameLowering.h:17,
                 from C:/bot/slave/auto-win-gnu-32-opt/build/src/llvm/lib/Target/Mips/Mips16FrameLowering.cpp:14:
C:/bot/slave/auto-win-gnu-32-opt/build/obj/i686-pc-windows-gnu/llvm/lib/Target/Mips/MipsGenInstrInfo.inc:2032:0: error: unterminated #ifdef
 #ifdef GET_INSTRINFO_MC_DESC
 ^
In file included from C:/bot/slave/auto-win-gnu-32-opt/build/src/llvm/lib/Target/Mips/MipsInstrInfo.h:29:0,
                 from C:/bot/slave/auto-win-gnu-32-opt/build/src/llvm/lib/Target/Mips/Mips16InstrInfo.h:18,
                 from C:/bot/slave/auto-win-gnu-32-opt/build/src/llvm/lib/Target/Mips/Mips16FrameLowering.cpp:16:
C:/bot/slave/auto-win-gnu-32-opt/build/obj/i686-pc-windows-gnu/llvm/lib/Target/Mips/MipsGenInstrInfo.inc:2032:0: error: unterminated #ifdef
 #ifdef GET_INSTRINFO_MC_DESC
 ^
In file included from C:/bot/slave/auto-win-gnu-32-opt/build/src/llvm/lib/Target/Mips/Mips16InstrInfo.h:18:0,
                 from C:/bot/slave/auto-win-gnu-32-opt/build/src/llvm/lib/Target/Mips/Mips16FrameLowering.cpp:16:
C:/bot/slave/auto-win-gnu-32-opt/build/src/llvm/lib/Target/Mips/MipsInstrInfo.h:33:47: error: expected class-name before '{' token
 class MipsInstrInfo : public MipsGenInstrInfo {
                                               ^
C:/bot/slave/auto-win-gnu-32-opt/build/src/llvm/lib/Target/Mips/MipsInstrInfo.h:54:8: error: 'bool llvm::MipsInstrInfo::AnalyzeBranch(llvm::MachineBasicBlock&, llvm::MachineBasicBlock*&, llvm::MachineBasicBlock*&, llvm::SmallVectorImpl<llvm::MachineOperand>&, bool) const' marked override, but does not override
   bool AnalyzeBranch(MachineBasicBlock &MBB, MachineBasicBlock *&TBB,
        ^
C:/bot/slave/auto-win-gnu-32-opt/build/src/llvm/lib/Target/Mips/MipsInstrInfo.h:59:12: error: 'unsigned int llvm::MipsInstrInfo::RemoveBranch(llvm::MachineBasicBlock&) const' marked override, but does not override
   unsigned RemoveBranch(MachineBasicBlock &MBB) const override;
            ^
C:/bot/slave/auto-win-gnu-32-opt/build/src/llvm/lib/Target/Mips/MipsInstrInfo.h:61:12: error: 'unsigned int llvm::MipsInstrInfo::InsertBranch(llvm::MachineBasicBlock&, llvm::MachineBasicBlock*, llvm::MachineBasicBlock*, llvm::ArrayRef<llvm::MachineOperand>, llvm::DebugLoc) const' marked override, but does not override
   unsigned InsertBranch(MachineBasicBlock &MBB, MachineBasicBlock *TBB,
            ^
C:/bot/slave/auto-win-gnu-32-opt/build/src/llvm/lib/Target/Mips/MipsInstrInfo.h:66:3: error: 'bool llvm::MipsInstrInfo::ReverseBranchCondition(llvm::SmallVectorImpl<llvm::MachineOperand>&) const' marked override, but does not override
   ReverseBranchCondition(SmallVectorImpl<MachineOperand> &Cond) const override;
   ^
C:/bot/slave/auto-win-gnu-32-opt/build/src/llvm/lib/Target/Mips/MipsInstrInfo.h:75:8: error: 'void llvm::MipsInstrInfo::insertNoop(llvm::MachineBasicBlock&, llvm::MachineBasicBlock::iterator) const' marked override, but does not override
   void insertNoop(MachineBasicBlock &MBB,
        ^
C:/bot/slave/auto-win-gnu-32-opt/build/src/llvm/lib/Target/Mips/MipsInstrInfo.h:89:8: error: 'void llvm::MipsInstrInfo::storeRegToStackSlot(llvm::MachineBasicBlock&, llvm::MachineBasicBlock::iterator, unsigned int, bool, int, const llvm::TargetRegisterClass*, const llvm::TargetRegisterInfo*) const' marked override, but does not override
   void storeRegToStackSlot(MachineBasicBlock &MBB,
        ^
C:/bot/slave/auto-win-gnu-32-opt/build/src/llvm/lib/Target/Mips/MipsInstrInfo.h:97:8: error: 'void llvm::MipsInstrInfo::loadRegFromStackSlot(llvm::MachineBasicBlock&, llvm::MachineBasicBlock::iterator, unsigned int, int, const llvm::TargetRegisterClass*, const llvm::TargetRegisterInfo*) const' marked override, but does not override
   void loadRegFromStackSlot(MachineBasicBlock &MBB,
        ^
In file included from C:/bot/slave/auto-win-gnu-32-opt/build/src/llvm/lib/Target/Mips/Mips16FrameLowering.cpp:16:0:
C:/bot/slave/auto-win-gnu-32-opt/build/src/llvm/lib/Target/Mips/Mips16InstrInfo.h:35:12: error: 'unsigned int llvm::Mips16InstrInfo::isLoadFromStackSlot(const llvm::MachineInstr*, int&) const' marked override, but does not override
   unsigned isLoadFromStackSlot(const MachineInstr *MI,
            ^
C:/bot/slave/auto-win-gnu-32-opt/build/src/llvm/lib/Target/Mips/Mips16InstrInfo.h:43:12: error: 'unsigned int llvm::Mips16InstrInfo::isStoreToStackSlot(const llvm::MachineInstr*, int&) const' marked override, but does not override
   unsigned isStoreToStackSlot(const MachineInstr *MI,
            ^
C:/bot/slave/auto-win-gnu-32-opt/build/src/llvm/lib/Target/Mips/Mips16InstrInfo.h:46:8: error: 'void llvm::Mips16InstrInfo::copyPhysReg(llvm::MachineBasicBlock&, llvm::MachineBasicBlock::iterator, llvm::DebugLoc, unsigned int, unsigned int, bool) const' marked override, but does not override
   void copyPhysReg(MachineBasicBlock &MBB,
        ^
C:/bot/slave/auto-win-gnu-32-opt/build/src/llvm/lib/Target/Mips/Mips16InstrInfo.h:65:8: error: 'bool llvm::Mips16InstrInfo::expandPostRAPseudo(llvm::MachineBasicBlock::iterator) const' marked override, but does not override
   bool expandPostRAPseudo(MachineBasicBlock::iterator MI) const override;
        ^
C:/bot/slave/auto-win-gnu-32-opt/build/src/llvm/lib/Target/Mips/Mips16InstrInfo.h:106:12: error: 'unsigned int llvm::Mips16InstrInfo::getInlineAsmLength(const char*, const llvm::MCAsmInfo&) const' marked override, but does not override
   unsigned getInlineAsmLength(const char *Str,
            ^
In file included from C:/bot/slave/auto-win-gnu-32-opt/build/src/llvm/lib/Target/Mips/Mips16FrameLowering.cpp:19:0:
C:/bot/slave/auto-win-gnu-32-opt/build/src/llvm/lib/Target/Mips/MipsSubtarget.h:281:24: error: invalid covariant return type for 'virtual const llvm::MipsInstrInfo* llvm::MipsSubtarget::getInstrInfo() const'
   const MipsInstrInfo *getInstrInfo() const override { return InstrInfo.get(); }
                        ^
In file included from C:/bot/slave/auto-win-gnu-32-opt/build/src/llvm/lib/Target/Mips/MipsSubtarget.h:25:0,
                 from C:/bot/slave/auto-win-gnu-32-opt/build/src/llvm/lib/Target/Mips/Mips16FrameLowering.cpp:19:
C:/bot/slave/auto-win-gnu-32-opt/build/src/llvm/include/llvm/Target/TargetSubtargetInfo.h:76:34: error:   overriding 'virtual const llvm::TargetInstrInfo* llvm::TargetSubtargetInfo::getInstrInfo() const'
   virtual const TargetInstrInfo *getInstrInfo() const { return nullptr; }
                                  ^
C:/bot/slave/auto-win-gnu-32-opt/build/src/llvm/lib/Target/Mips/Mips16FrameLowering.cpp: In member function 'virtual void llvm::Mips16FrameLowering::emitPrologue(llvm::MachineFunction&, llvm::MachineBasicBlock&) const':
C:/bot/slave/auto-win-gnu-32-opt/build/src/llvm/lib/Target/Mips/Mips16FrameLowering.cpp:58:30: error: 'const class llvm::Mips16InstrInfo' has no member named 'get'
   BuildMI(MBB, MBBI, dl, TII.get(TargetOpcode::CFI_INSTRUCTION))
                              ^
C:/bot/slave/auto-win-gnu-32-opt/build/src/llvm/lib/Target/Mips/Mips16FrameLowering.cpp:73:34: error: 'const class llvm::Mips16InstrInfo' has no member named 'get'
       BuildMI(MBB, MBBI, dl, TII.get(TargetOpcode::CFI_INSTRUCTION))
                                  ^
C:/bot/slave/auto-win-gnu-32-opt/build/src/llvm/lib/Target/Mips/Mips16FrameLowering.cpp:78:32: error: 'const class llvm::Mips16InstrInfo' has no member named 'get'
     BuildMI(MBB, MBBI, dl, TII.get(Mips::MoveR3216), Mips::S0)
                                ^
C:/bot/slave/auto-win-gnu-32-opt/build/src/llvm/lib/Target/Mips/Mips16FrameLowering.cpp: In member function 'virtual void llvm::Mips16FrameLowering::emitEpilogue(llvm::MachineFunction&, llvm::MachineBasicBlock&) const':
C:/bot/slave/auto-win-gnu-32-opt/build/src/llvm/lib/Target/Mips/Mips16FrameLowering.cpp:96:32: error: 'const class llvm::Mips16InstrInfo' has no member named 'get'
     BuildMI(MBB, MBBI, dl, TII.get(Mips::Move32R16), Mips::SP)
                                ^
/c/bot/slave/auto-win-gnu-32-opt/build/src/llvm/Makefile.rules:1521: recipe for target '/c/bot/slave/auto-win-gnu-32-opt/build/obj/i686-pc-windows-gnu/llvm/lib/Target/Mips/Release/Mips16FrameLowering.o' failed
make[4]: Leaving directory '/c/bot/slave/auto-win-gnu-32-opt/build/obj/i686-pc-windows-gnu/llvm/lib/Target/Mips'

[pnkfelix]

cc @edunham @alexcrichton

[alexcrichton]

The bot's now shut down so it'll be pretty difficult to diagnose to prevent this from happening in the future, but for now the new bots should have a clean slate where this doesn't happen.