llvm/lib/Target/VE/VEAsmPrinter.cpp - llvm-project - Git at Google

 //===-- VEAsmPrinter.cpp - VE LLVM assembly writer ------------------------===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
 // See https://llvm.org/LICENSE.txt for license information.
 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 //
 //===----------------------------------------------------------------------===//
 //
 // This file contains a printer that converts from our internal representation
 // of machine-dependent LLVM code to GAS-format VE assembly language.
 //
 //===----------------------------------------------------------------------===//

 #include "MCTargetDesc/VEInstPrinter.h"
 #include "MCTargetDesc/VEMCAsmInfo.h"
 #include "MCTargetDesc/VETargetStreamer.h"
 #include "TargetInfo/VETargetInfo.h"
 #include "VE.h"
 #include "VEInstrInfo.h"
 #include "llvm/CodeGen/AsmPrinter.h"
 #include "llvm/CodeGen/MachineInstr.h"
 #include "llvm/CodeGen/MachineModuleInfoImpls.h"
 #include "llvm/CodeGen/TargetLoweringObjectFileImpl.h"
 #include "llvm/IR/Mangler.h"
 #include "llvm/MC/MCAsmInfo.h"
 #include "llvm/MC/MCContext.h"
 #include "llvm/MC/MCInst.h"
 #include "llvm/MC/MCStreamer.h"
 #include "llvm/MC/MCSymbol.h"
 #include "llvm/MC/TargetRegistry.h"
 #include "llvm/Support/Compiler.h"
 #include "llvm/Support/raw_ostream.h"
 using namespace llvm;

 #define DEBUG_TYPE "ve-asmprinter"

 namespace {
 class VEAsmPrinter : public AsmPrinter {
   VETargetStreamer &getTargetStreamer() {
     return static_cast<VETargetStreamer &>(*OutStreamer->getTargetStreamer());
   }

 public:
   explicit VEAsmPrinter(TargetMachine &TM, std::unique_ptr<MCStreamer> Streamer)
       : AsmPrinter(TM, std::move(Streamer), ID) {}

   StringRef getPassName() const override { return "VE Assembly Printer"; }

   void lowerGETGOTAndEmitMCInsts(const MachineInstr *MI,
                                  const MCSubtargetInfo &STI);
   void lowerGETFunPLTAndEmitMCInsts(const MachineInstr *MI,
                                     const MCSubtargetInfo &STI);
   void lowerGETTLSAddrAndEmitMCInsts(const MachineInstr *MI,
                                      const MCSubtargetInfo &STI);

   void emitInstruction(const MachineInstr *MI) override;

   static const char *getRegisterName(MCRegister Reg) {
     return VEInstPrinter::getRegisterName(Reg);
   }
   void printOperand(const MachineInstr *MI, int OpNum, raw_ostream &OS);
   bool PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
                        const char *ExtraCode, raw_ostream &O) override;
   bool PrintAsmMemoryOperand(const MachineInstr *MI, unsigned OpNo,
                              const char *ExtraCode, raw_ostream &O) override;

   static char ID;
 };
 } // end of anonymous namespace

 static MCOperand createVEMCOperand(VE::Specifier Kind, MCSymbol *Sym,
                                    MCContext &OutContext) {
   const MCSymbolRefExpr *MCSym = MCSymbolRefExpr::create(Sym, OutContext);
   return MCOperand::createExpr(
       MCSpecifierExpr::create(MCSym, Kind, OutContext));
 }

 static MCOperand createGOTRelExprOp(VE::Specifier Kind, MCSymbol *GOTLabel,
                                     MCContext &OutContext) {
   const MCSymbolRefExpr *GOT = MCSymbolRefExpr::create(GOTLabel, OutContext);
   return MCOperand::createExpr(MCSpecifierExpr::create(GOT, Kind, OutContext));
 }

 static void emitSIC(MCStreamer &OutStreamer, MCOperand &RD,
                     const MCSubtargetInfo &STI) {
   MCInst SICInst;
   SICInst.setOpcode(VE::SIC);
   SICInst.addOperand(RD);
   OutStreamer.emitInstruction(SICInst, STI);
 }

 static void emitBSIC(MCStreamer &OutStreamer, MCOperand &R1, MCOperand &R2,
                      const MCSubtargetInfo &STI) {
   MCInst BSICInst;
   BSICInst.setOpcode(VE::BSICrii);
   BSICInst.addOperand(R1);
   BSICInst.addOperand(R2);
   MCOperand czero = MCOperand::createImm(0);
   BSICInst.addOperand(czero);
   BSICInst.addOperand(czero);
   OutStreamer.emitInstruction(BSICInst, STI);
 }

 static void emitLEAzzi(MCStreamer &OutStreamer, MCOperand &Imm, MCOperand &RD,
                        const MCSubtargetInfo &STI) {
   MCInst LEAInst;
   LEAInst.setOpcode(VE::LEAzii);
   LEAInst.addOperand(RD);
   MCOperand CZero = MCOperand::createImm(0);
   LEAInst.addOperand(CZero);
   LEAInst.addOperand(CZero);
   LEAInst.addOperand(Imm);
   OutStreamer.emitInstruction(LEAInst, STI);
 }

 static void emitLEASLzzi(MCStreamer &OutStreamer, MCOperand &Imm, MCOperand &RD,
                          const MCSubtargetInfo &STI) {
   MCInst LEASLInst;
   LEASLInst.setOpcode(VE::LEASLzii);
   LEASLInst.addOperand(RD);
   MCOperand CZero = MCOperand::createImm(0);
   LEASLInst.addOperand(CZero);
   LEASLInst.addOperand(CZero);
   LEASLInst.addOperand(Imm);
   OutStreamer.emitInstruction(LEASLInst, STI);
 }

 static void emitLEAzii(MCStreamer &OutStreamer, MCOperand &RS1, MCOperand &Imm,
                        MCOperand &RD, const MCSubtargetInfo &STI) {
   MCInst LEAInst;
   LEAInst.setOpcode(VE::LEAzii);
   LEAInst.addOperand(RD);
   MCOperand CZero = MCOperand::createImm(0);
   LEAInst.addOperand(CZero);
   LEAInst.addOperand(RS1);
   LEAInst.addOperand(Imm);
   OutStreamer.emitInstruction(LEAInst, STI);
 }

 static void emitLEASLrri(MCStreamer &OutStreamer, MCOperand &RS1,
                          MCOperand &RS2, MCOperand &Imm, MCOperand &RD,
                          const MCSubtargetInfo &STI) {
   MCInst LEASLInst;
   LEASLInst.setOpcode(VE::LEASLrri);
   LEASLInst.addOperand(RD);
   LEASLInst.addOperand(RS1);
   LEASLInst.addOperand(RS2);
   LEASLInst.addOperand(Imm);
   OutStreamer.emitInstruction(LEASLInst, STI);
 }

 static void emitBinary(MCStreamer &OutStreamer, unsigned Opcode, MCOperand &RS1,
                        MCOperand &Src2, MCOperand &RD,
                        const MCSubtargetInfo &STI) {
   MCInst Inst;
   Inst.setOpcode(Opcode);
   Inst.addOperand(RD);
   Inst.addOperand(RS1);
   Inst.addOperand(Src2);
   OutStreamer.emitInstruction(Inst, STI);
 }

 static void emitANDrm(MCStreamer &OutStreamer, MCOperand &RS1, MCOperand &Imm,
                       MCOperand &RD, const MCSubtargetInfo &STI) {
   emitBinary(OutStreamer, VE::ANDrm, RS1, Imm, RD, STI);
 }

 static void emitHiLo(MCStreamer &OutStreamer, MCSymbol *GOTSym,
                      VE::Specifier HiKind, VE::Specifier LoKind, MCOperand &RD,
                      MCContext &OutContext, const MCSubtargetInfo &STI) {

   MCOperand hi = createVEMCOperand(HiKind, GOTSym, OutContext);
   MCOperand lo = createVEMCOperand(LoKind, GOTSym, OutContext);
   emitLEAzzi(OutStreamer, lo, RD, STI);
   MCOperand M032 = MCOperand::createImm(M0(32));
   emitANDrm(OutStreamer, RD, M032, RD, STI);
   emitLEASLzzi(OutStreamer, hi, RD, STI);
 }

 void VEAsmPrinter::lowerGETGOTAndEmitMCInsts(const MachineInstr *MI,
                                              const MCSubtargetInfo &STI) {
   MCSymbol *GOTLabel =
       OutContext.getOrCreateSymbol(Twine("_GLOBAL_OFFSET_TABLE_"));

   const MachineOperand &MO = MI->getOperand(0);
   MCOperand MCRegOP = MCOperand::createReg(MO.getReg());

   if (!isPositionIndependent()) {
     // Just load the address of GOT to MCRegOP.
     switch (TM.getCodeModel()) {
     default:
       llvm_unreachable("Unsupported absolute code model");
     case CodeModel::Small:
     case CodeModel::Medium:
     case CodeModel::Large:
       emitHiLo(*OutStreamer, GOTLabel, VE::S_HI32, VE::S_LO32, MCRegOP,
                OutContext, STI);
       break;
     }
     return;
   }

   MCOperand RegGOT = MCOperand::createReg(VE::SX15); // GOT
   MCOperand RegPLT = MCOperand::createReg(VE::SX16); // PLT

   // lea %got, _GLOBAL_OFFSET_TABLE_@PC_LO(-24)
   // and %got, %got, (32)0
   // sic %plt
   // lea.sl %got, _GLOBAL_OFFSET_TABLE_@PC_HI(%plt, %got)
   MCOperand cim24 = MCOperand::createImm(-24);
   MCOperand loImm = createGOTRelExprOp(VE::S_PC_LO32, GOTLabel, OutContext);
   emitLEAzii(*OutStreamer, cim24, loImm, MCRegOP, STI);
   MCOperand M032 = MCOperand::createImm(M0(32));
   emitANDrm(*OutStreamer, MCRegOP, M032, MCRegOP, STI);
   emitSIC(*OutStreamer, RegPLT, STI);
   MCOperand hiImm = createGOTRelExprOp(VE::S_PC_HI32, GOTLabel, OutContext);
   emitLEASLrri(*OutStreamer, RegGOT, RegPLT, hiImm, MCRegOP, STI);
 }

 void VEAsmPrinter::lowerGETFunPLTAndEmitMCInsts(const MachineInstr *MI,
                                                 const MCSubtargetInfo &STI) {
   const MachineOperand &MO = MI->getOperand(0);
   MCOperand MCRegOP = MCOperand::createReg(MO.getReg());
   const MachineOperand &Addr = MI->getOperand(1);
   MCSymbol *AddrSym = nullptr;

   switch (Addr.getType()) {
   default:
     llvm_unreachable("<unknown operand type>");
     return;
   case MachineOperand::MO_MachineBasicBlock:
     report_fatal_error("MBB is not supported yet");
     return;
   case MachineOperand::MO_ConstantPoolIndex:
     report_fatal_error("ConstantPool is not supported yet");
     return;
   case MachineOperand::MO_ExternalSymbol:
     AddrSym = GetExternalSymbolSymbol(Addr.getSymbolName());
     break;
   case MachineOperand::MO_GlobalAddress:
     AddrSym = getSymbol(Addr.getGlobal());
     break;
   }

   if (!isPositionIndependent()) {
     llvm_unreachable("Unsupported uses of %plt in not PIC code");
     return;
   }

   MCOperand RegPLT = MCOperand::createReg(VE::SX16); // PLT

   // lea %dst, func@plt_lo(-24)
   // and %dst, %dst, (32)0
   // sic %plt                            ; FIXME: is it safe to use %plt here?
   // lea.sl %dst, func@plt_hi(%plt, %dst)
   MCOperand cim24 = MCOperand::createImm(-24);
   MCOperand loImm = createGOTRelExprOp(VE::S_PLT_LO32, AddrSym, OutContext);
   emitLEAzii(*OutStreamer, cim24, loImm, MCRegOP, STI);
   MCOperand M032 = MCOperand::createImm(M0(32));
   emitANDrm(*OutStreamer, MCRegOP, M032, MCRegOP, STI);
   emitSIC(*OutStreamer, RegPLT, STI);
   MCOperand hiImm = createGOTRelExprOp(VE::S_PLT_HI32, AddrSym, OutContext);
   emitLEASLrri(*OutStreamer, MCRegOP, RegPLT, hiImm, MCRegOP, STI);
 }

 void VEAsmPrinter::lowerGETTLSAddrAndEmitMCInsts(const MachineInstr *MI,
                                                  const MCSubtargetInfo &STI) {
   const MachineOperand &Addr = MI->getOperand(0);
   MCSymbol *AddrSym = nullptr;

   switch (Addr.getType()) {
   default:
     llvm_unreachable("<unknown operand type>");
     return;
   case MachineOperand::MO_MachineBasicBlock:
     report_fatal_error("MBB is not supported yet");
     return;
   case MachineOperand::MO_ConstantPoolIndex:
     report_fatal_error("ConstantPool is not supported yet");
     return;
   case MachineOperand::MO_ExternalSymbol:
     AddrSym = GetExternalSymbolSymbol(Addr.getSymbolName());
     break;
   case MachineOperand::MO_GlobalAddress:
     AddrSym = getSymbol(Addr.getGlobal());
     break;
   }

   MCOperand RegLR = MCOperand::createReg(VE::SX10);  // LR
   MCOperand RegS0 = MCOperand::createReg(VE::SX0);   // S0
   MCOperand RegS12 = MCOperand::createReg(VE::SX12); // S12
   MCSymbol *GetTLSLabel = OutContext.getOrCreateSymbol(Twine("__tls_get_addr"));

   // lea %s0, sym@tls_gd_lo(-24)
   // and %s0, %s0, (32)0
   // sic %lr
   // lea.sl %s0, sym@tls_gd_hi(%lr, %s0)
   // lea %s12, __tls_get_addr@plt_lo(8)
   // and %s12, %s12, (32)0
   // lea.sl %s12, __tls_get_addr@plt_hi(%s12, %lr)
   // bsic %lr, (, %s12)
   MCOperand cim24 = MCOperand::createImm(-24);
   MCOperand loImm = createGOTRelExprOp(VE::S_TLS_GD_LO32, AddrSym, OutContext);
   emitLEAzii(*OutStreamer, cim24, loImm, RegS0, STI);
   MCOperand M032 = MCOperand::createImm(M0(32));
   emitANDrm(*OutStreamer, RegS0, M032, RegS0, STI);
   emitSIC(*OutStreamer, RegLR, STI);
   MCOperand hiImm = createGOTRelExprOp(VE::S_TLS_GD_HI32, AddrSym, OutContext);
   emitLEASLrri(*OutStreamer, RegS0, RegLR, hiImm, RegS0, STI);
   MCOperand ci8 = MCOperand::createImm(8);
   MCOperand loImm2 =
       createGOTRelExprOp(VE::S_PLT_LO32, GetTLSLabel, OutContext);
   emitLEAzii(*OutStreamer, ci8, loImm2, RegS12, STI);
   emitANDrm(*OutStreamer, RegS12, M032, RegS12, STI);
   MCOperand hiImm2 =
       createGOTRelExprOp(VE::S_PLT_HI32, GetTLSLabel, OutContext);
   emitLEASLrri(*OutStreamer, RegS12, RegLR, hiImm2, RegS12, STI);
   emitBSIC(*OutStreamer, RegLR, RegS12, STI);
 }

 void VEAsmPrinter::emitInstruction(const MachineInstr *MI) {
   VE_MC::verifyInstructionPredicates(MI->getOpcode(),
                                      getSubtargetInfo().getFeatureBits());

   switch (MI->getOpcode()) {
   default:
     break;
   case TargetOpcode::DBG_VALUE:
     // FIXME: Debug Value.
     return;
   case VE::GETGOT:
     lowerGETGOTAndEmitMCInsts(MI, getSubtargetInfo());
     return;
   case VE::GETFUNPLT:
     lowerGETFunPLTAndEmitMCInsts(MI, getSubtargetInfo());
     return;
   case VE::GETTLSADDR:
     lowerGETTLSAddrAndEmitMCInsts(MI, getSubtargetInfo());
     return;
   }

   MachineBasicBlock::const_instr_iterator I = MI->getIterator();
   MachineBasicBlock::const_instr_iterator E = MI->getParent()->instr_end();
   do {
     MCInst TmpInst;
     LowerVEMachineInstrToMCInst(&*I, TmpInst, *this);
     EmitToStreamer(*OutStreamer, TmpInst);
   } while ((++I != E) && I->isInsideBundle()); // Delay slot check.
 }

 void VEAsmPrinter::printOperand(const MachineInstr *MI, int OpNum,
                                 raw_ostream &O) {
   const MachineOperand &MO = MI->getOperand(OpNum);

   switch (MO.getType()) {
   case MachineOperand::MO_Register:
     O << "%" << StringRef(getRegisterName(MO.getReg())).lower();
     break;
   case MachineOperand::MO_Immediate:
     O << (int)MO.getImm();
     break;
   default:
     llvm_unreachable("<unknown operand type>");
   }
 }

 // PrintAsmOperand - Print out an operand for an inline asm expression.
 bool VEAsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
                                    const char *ExtraCode, raw_ostream &O) {
   if (ExtraCode && ExtraCode[0]) {
     if (ExtraCode[1] != 0)
       return true; // Unknown modifier.

     switch (ExtraCode[0]) {
     default:
       // See if this is a generic print operand
       return AsmPrinter::PrintAsmOperand(MI, OpNo, ExtraCode, O);
     case 'r':
     case 'v':
       break;
     }
   }

   printOperand(MI, OpNo, O);

   return false;
 }

 bool VEAsmPrinter::PrintAsmMemoryOperand(const MachineInstr *MI, unsigned OpNo,
                                          const char *ExtraCode,
                                          raw_ostream &O) {
   if (ExtraCode && ExtraCode[0])
     return true;  // Unknown modifier

   if (MI->getOperand(OpNo+1).isImm() &&
       MI->getOperand(OpNo+1).getImm() == 0) {
     // don't print "+0"
   } else {
     printOperand(MI, OpNo+1, O);
   }
   if (MI->getOperand(OpNo).isImm() &&
       MI->getOperand(OpNo).getImm() == 0) {
     if (MI->getOperand(OpNo+1).isImm() &&
         MI->getOperand(OpNo+1).getImm() == 0) {
       O << "0";
     } else {
       // don't print "(0)"
     }
   } else {
     O << "(";
     printOperand(MI, OpNo, O);
     O << ")";
   }
   return false;
 }

 char VEAsmPrinter::ID = 0;

 INITIALIZE_PASS(VEAsmPrinter, "ve-asm-printer", "VE Assembly Printer", false,
                 false)

 // Force static initialization.
 extern "C" LLVM_ABI LLVM_EXTERNAL_VISIBILITY void LLVMInitializeVEAsmPrinter() {
   RegisterAsmPrinter<VEAsmPrinter> X(getTheVETarget());
 }
	//===-- VEAsmPrinter.cpp - VE LLVM assembly writer ------------------------===//
	//
	// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
	// See https://llvm.org/LICENSE.txt for license information.
	// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
	//
	//===----------------------------------------------------------------------===//
	//
	// This file contains a printer that converts from our internal representation
	// of machine-dependent LLVM code to GAS-format VE assembly language.
	//
	//===----------------------------------------------------------------------===//

	#include "MCTargetDesc/VEInstPrinter.h"
	#include "MCTargetDesc/VEMCAsmInfo.h"
	#include "MCTargetDesc/VETargetStreamer.h"
	#include "TargetInfo/VETargetInfo.h"
	#include "VE.h"
	#include "VEInstrInfo.h"
	#include "llvm/CodeGen/AsmPrinter.h"
	#include "llvm/CodeGen/MachineInstr.h"
	#include "llvm/CodeGen/MachineModuleInfoImpls.h"
	#include "llvm/CodeGen/TargetLoweringObjectFileImpl.h"
	#include "llvm/IR/Mangler.h"
	#include "llvm/MC/MCAsmInfo.h"
	#include "llvm/MC/MCContext.h"
	#include "llvm/MC/MCInst.h"
	#include "llvm/MC/MCStreamer.h"
	#include "llvm/MC/MCSymbol.h"
	#include "llvm/MC/TargetRegistry.h"
	#include "llvm/Support/Compiler.h"
	#include "llvm/Support/raw_ostream.h"
	using namespace llvm;

	#define DEBUG_TYPE "ve-asmprinter"

	namespace {
	class VEAsmPrinter : public AsmPrinter {
	VETargetStreamer &getTargetStreamer() {
	return static_cast<VETargetStreamer &>(*OutStreamer->getTargetStreamer());
	}

	public:
	explicit VEAsmPrinter(TargetMachine &TM, std::unique_ptr<MCStreamer> Streamer)
	: AsmPrinter(TM, std::move(Streamer), ID) {}

	StringRef getPassName() const override { return "VE Assembly Printer"; }

	void lowerGETGOTAndEmitMCInsts(const MachineInstr *MI,
	const MCSubtargetInfo &STI);
	void lowerGETFunPLTAndEmitMCInsts(const MachineInstr *MI,
	const MCSubtargetInfo &STI);
	void lowerGETTLSAddrAndEmitMCInsts(const MachineInstr *MI,
	const MCSubtargetInfo &STI);

	void emitInstruction(const MachineInstr *MI) override;

	static const char *getRegisterName(MCRegister Reg) {
	return VEInstPrinter::getRegisterName(Reg);
	}
	void printOperand(const MachineInstr *MI, int OpNum, raw_ostream &OS);
	bool PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
	const char *ExtraCode, raw_ostream &O) override;
	bool PrintAsmMemoryOperand(const MachineInstr *MI, unsigned OpNo,
	const char *ExtraCode, raw_ostream &O) override;

	static char ID;
	};
	} // end of anonymous namespace

	static MCOperand createVEMCOperand(VE::Specifier Kind, MCSymbol *Sym,
	MCContext &OutContext) {
	const MCSymbolRefExpr *MCSym = MCSymbolRefExpr::create(Sym, OutContext);
	return MCOperand::createExpr(
	MCSpecifierExpr::create(MCSym, Kind, OutContext));
	}

	static MCOperand createGOTRelExprOp(VE::Specifier Kind, MCSymbol *GOTLabel,
	MCContext &OutContext) {
	const MCSymbolRefExpr *GOT = MCSymbolRefExpr::create(GOTLabel, OutContext);
	return MCOperand::createExpr(MCSpecifierExpr::create(GOT, Kind, OutContext));
	}

	static void emitSIC(MCStreamer &OutStreamer, MCOperand &RD,
	const MCSubtargetInfo &STI) {
	MCInst SICInst;
	SICInst.setOpcode(VE::SIC);
	SICInst.addOperand(RD);
	OutStreamer.emitInstruction(SICInst, STI);
	}

	static void emitBSIC(MCStreamer &OutStreamer, MCOperand &R1, MCOperand &R2,
	const MCSubtargetInfo &STI) {
	MCInst BSICInst;
	BSICInst.setOpcode(VE::BSICrii);
	BSICInst.addOperand(R1);
	BSICInst.addOperand(R2);
	MCOperand czero = MCOperand::createImm(0);
	BSICInst.addOperand(czero);
	BSICInst.addOperand(czero);
	OutStreamer.emitInstruction(BSICInst, STI);
	}

	static void emitLEAzzi(MCStreamer &OutStreamer, MCOperand &Imm, MCOperand &RD,
	const MCSubtargetInfo &STI) {
	MCInst LEAInst;
	LEAInst.setOpcode(VE::LEAzii);
	LEAInst.addOperand(RD);
	MCOperand CZero = MCOperand::createImm(0);
	LEAInst.addOperand(CZero);
	LEAInst.addOperand(CZero);
	LEAInst.addOperand(Imm);
	OutStreamer.emitInstruction(LEAInst, STI);
	}

	static void emitLEASLzzi(MCStreamer &OutStreamer, MCOperand &Imm, MCOperand &RD,
	const MCSubtargetInfo &STI) {
	MCInst LEASLInst;
	LEASLInst.setOpcode(VE::LEASLzii);
	LEASLInst.addOperand(RD);
	MCOperand CZero = MCOperand::createImm(0);
	LEASLInst.addOperand(CZero);
	LEASLInst.addOperand(CZero);
	LEASLInst.addOperand(Imm);
	OutStreamer.emitInstruction(LEASLInst, STI);
	}

	static void emitLEAzii(MCStreamer &OutStreamer, MCOperand &RS1, MCOperand &Imm,
	MCOperand &RD, const MCSubtargetInfo &STI) {
	MCInst LEAInst;
	LEAInst.setOpcode(VE::LEAzii);
	LEAInst.addOperand(RD);
	MCOperand CZero = MCOperand::createImm(0);
	LEAInst.addOperand(CZero);
	LEAInst.addOperand(RS1);
	LEAInst.addOperand(Imm);
	OutStreamer.emitInstruction(LEAInst, STI);
	}

	static void emitLEASLrri(MCStreamer &OutStreamer, MCOperand &RS1,
	MCOperand &RS2, MCOperand &Imm, MCOperand &RD,
	const MCSubtargetInfo &STI) {
	MCInst LEASLInst;
	LEASLInst.setOpcode(VE::LEASLrri);
	LEASLInst.addOperand(RD);
	LEASLInst.addOperand(RS1);
	LEASLInst.addOperand(RS2);
	LEASLInst.addOperand(Imm);
	OutStreamer.emitInstruction(LEASLInst, STI);
	}

	static void emitBinary(MCStreamer &OutStreamer, unsigned Opcode, MCOperand &RS1,
	MCOperand &Src2, MCOperand &RD,
	const MCSubtargetInfo &STI) {
	MCInst Inst;
	Inst.setOpcode(Opcode);
	Inst.addOperand(RD);
	Inst.addOperand(RS1);
	Inst.addOperand(Src2);
	OutStreamer.emitInstruction(Inst, STI);
	}

	static void emitANDrm(MCStreamer &OutStreamer, MCOperand &RS1, MCOperand &Imm,
	MCOperand &RD, const MCSubtargetInfo &STI) {
	emitBinary(OutStreamer, VE::ANDrm, RS1, Imm, RD, STI);
	}

	static void emitHiLo(MCStreamer &OutStreamer, MCSymbol *GOTSym,
	VE::Specifier HiKind, VE::Specifier LoKind, MCOperand &RD,
	MCContext &OutContext, const MCSubtargetInfo &STI) {

	MCOperand hi = createVEMCOperand(HiKind, GOTSym, OutContext);
	MCOperand lo = createVEMCOperand(LoKind, GOTSym, OutContext);
	emitLEAzzi(OutStreamer, lo, RD, STI);
	MCOperand M032 = MCOperand::createImm(M0(32));
	emitANDrm(OutStreamer, RD, M032, RD, STI);
	emitLEASLzzi(OutStreamer, hi, RD, STI);
	}

	void VEAsmPrinter::lowerGETGOTAndEmitMCInsts(const MachineInstr *MI,
	const MCSubtargetInfo &STI) {
	MCSymbol *GOTLabel =
	OutContext.getOrCreateSymbol(Twine("_GLOBAL_OFFSET_TABLE_"));

	const MachineOperand &MO = MI->getOperand(0);
	MCOperand MCRegOP = MCOperand::createReg(MO.getReg());

	if (!isPositionIndependent()) {
	// Just load the address of GOT to MCRegOP.
	switch (TM.getCodeModel()) {
	default:
	llvm_unreachable("Unsupported absolute code model");
	case CodeModel::Small:
	case CodeModel::Medium:
	case CodeModel::Large:
	emitHiLo(*OutStreamer, GOTLabel, VE::S_HI32, VE::S_LO32, MCRegOP,
	OutContext, STI);
	break;
	}
	return;
	}

	MCOperand RegGOT = MCOperand::createReg(VE::SX15); // GOT
	MCOperand RegPLT = MCOperand::createReg(VE::SX16); // PLT

	// lea %got, _GLOBAL_OFFSET_TABLE_@PC_LO(-24)
	// and %got, %got, (32)0
	// sic %plt
	// lea.sl %got, _GLOBAL_OFFSET_TABLE_@PC_HI(%plt, %got)
	MCOperand cim24 = MCOperand::createImm(-24);
	MCOperand loImm = createGOTRelExprOp(VE::S_PC_LO32, GOTLabel, OutContext);
	emitLEAzii(*OutStreamer, cim24, loImm, MCRegOP, STI);
	MCOperand M032 = MCOperand::createImm(M0(32));
	emitANDrm(*OutStreamer, MCRegOP, M032, MCRegOP, STI);
	emitSIC(*OutStreamer, RegPLT, STI);
	MCOperand hiImm = createGOTRelExprOp(VE::S_PC_HI32, GOTLabel, OutContext);
	emitLEASLrri(*OutStreamer, RegGOT, RegPLT, hiImm, MCRegOP, STI);
	}

	void VEAsmPrinter::lowerGETFunPLTAndEmitMCInsts(const MachineInstr *MI,
	const MCSubtargetInfo &STI) {
	const MachineOperand &MO = MI->getOperand(0);
	MCOperand MCRegOP = MCOperand::createReg(MO.getReg());
	const MachineOperand &Addr = MI->getOperand(1);
	MCSymbol *AddrSym = nullptr;

	switch (Addr.getType()) {
	default:
	llvm_unreachable("<unknown operand type>");
	return;
	case MachineOperand::MO_MachineBasicBlock:
	report_fatal_error("MBB is not supported yet");
	return;
	case MachineOperand::MO_ConstantPoolIndex:
	report_fatal_error("ConstantPool is not supported yet");
	return;
	case MachineOperand::MO_ExternalSymbol:
	AddrSym = GetExternalSymbolSymbol(Addr.getSymbolName());
	break;
	case MachineOperand::MO_GlobalAddress:
	AddrSym = getSymbol(Addr.getGlobal());
	break;
	}

	if (!isPositionIndependent()) {
	llvm_unreachable("Unsupported uses of %plt in not PIC code");
	return;
	}

	MCOperand RegPLT = MCOperand::createReg(VE::SX16); // PLT

	// lea %dst, func@plt_lo(-24)
	// and %dst, %dst, (32)0
	// sic %plt ; FIXME: is it safe to use %plt here?
	// lea.sl %dst, func@plt_hi(%plt, %dst)
	MCOperand cim24 = MCOperand::createImm(-24);
	MCOperand loImm = createGOTRelExprOp(VE::S_PLT_LO32, AddrSym, OutContext);
	emitLEAzii(*OutStreamer, cim24, loImm, MCRegOP, STI);
	MCOperand M032 = MCOperand::createImm(M0(32));
	emitANDrm(*OutStreamer, MCRegOP, M032, MCRegOP, STI);
	emitSIC(*OutStreamer, RegPLT, STI);
	MCOperand hiImm = createGOTRelExprOp(VE::S_PLT_HI32, AddrSym, OutContext);
	emitLEASLrri(*OutStreamer, MCRegOP, RegPLT, hiImm, MCRegOP, STI);
	}

	void VEAsmPrinter::lowerGETTLSAddrAndEmitMCInsts(const MachineInstr *MI,
	const MCSubtargetInfo &STI) {
	const MachineOperand &Addr = MI->getOperand(0);
	MCSymbol *AddrSym = nullptr;

	switch (Addr.getType()) {
	default:
	llvm_unreachable("<unknown operand type>");
	return;
	case MachineOperand::MO_MachineBasicBlock:
	report_fatal_error("MBB is not supported yet");
	return;
	case MachineOperand::MO_ConstantPoolIndex:
	report_fatal_error("ConstantPool is not supported yet");
	return;
	case MachineOperand::MO_ExternalSymbol:
	AddrSym = GetExternalSymbolSymbol(Addr.getSymbolName());
	break;
	case MachineOperand::MO_GlobalAddress:
	AddrSym = getSymbol(Addr.getGlobal());
	break;
	}

	MCOperand RegLR = MCOperand::createReg(VE::SX10); // LR
	MCOperand RegS0 = MCOperand::createReg(VE::SX0); // S0
	MCOperand RegS12 = MCOperand::createReg(VE::SX12); // S12
	MCSymbol *GetTLSLabel = OutContext.getOrCreateSymbol(Twine("__tls_get_addr"));

	// lea %s0, sym@tls_gd_lo(-24)
	// and %s0, %s0, (32)0
	// sic %lr
	// lea.sl %s0, sym@tls_gd_hi(%lr, %s0)
	// lea %s12, __tls_get_addr@plt_lo(8)
	// and %s12, %s12, (32)0
	// lea.sl %s12, __tls_get_addr@plt_hi(%s12, %lr)
	// bsic %lr, (, %s12)
	MCOperand cim24 = MCOperand::createImm(-24);
	MCOperand loImm = createGOTRelExprOp(VE::S_TLS_GD_LO32, AddrSym, OutContext);
	emitLEAzii(*OutStreamer, cim24, loImm, RegS0, STI);
	MCOperand M032 = MCOperand::createImm(M0(32));
	emitANDrm(*OutStreamer, RegS0, M032, RegS0, STI);
	emitSIC(*OutStreamer, RegLR, STI);
	MCOperand hiImm = createGOTRelExprOp(VE::S_TLS_GD_HI32, AddrSym, OutContext);
	emitLEASLrri(*OutStreamer, RegS0, RegLR, hiImm, RegS0, STI);
	MCOperand ci8 = MCOperand::createImm(8);
	MCOperand loImm2 =
	createGOTRelExprOp(VE::S_PLT_LO32, GetTLSLabel, OutContext);
	emitLEAzii(*OutStreamer, ci8, loImm2, RegS12, STI);
	emitANDrm(*OutStreamer, RegS12, M032, RegS12, STI);
	MCOperand hiImm2 =
	createGOTRelExprOp(VE::S_PLT_HI32, GetTLSLabel, OutContext);
	emitLEASLrri(*OutStreamer, RegS12, RegLR, hiImm2, RegS12, STI);
	emitBSIC(*OutStreamer, RegLR, RegS12, STI);
	}

	void VEAsmPrinter::emitInstruction(const MachineInstr *MI) {
	VE_MC::verifyInstructionPredicates(MI->getOpcode(),
	getSubtargetInfo().getFeatureBits());

	switch (MI->getOpcode()) {
	default:
	break;
	case TargetOpcode::DBG_VALUE:
	// FIXME: Debug Value.
	return;
	case VE::GETGOT:
	lowerGETGOTAndEmitMCInsts(MI, getSubtargetInfo());
	return;
	case VE::GETFUNPLT:
	lowerGETFunPLTAndEmitMCInsts(MI, getSubtargetInfo());
	return;
	case VE::GETTLSADDR:
	lowerGETTLSAddrAndEmitMCInsts(MI, getSubtargetInfo());
	return;
	}

	MachineBasicBlock::const_instr_iterator I = MI->getIterator();
	MachineBasicBlock::const_instr_iterator E = MI->getParent()->instr_end();
	do {
	MCInst TmpInst;
	LowerVEMachineInstrToMCInst(&I, TmpInst, this);
	EmitToStreamer(*OutStreamer, TmpInst);
	} while ((++I != E) && I->isInsideBundle()); // Delay slot check.
	}

	void VEAsmPrinter::printOperand(const MachineInstr *MI, int OpNum,
	raw_ostream &O) {
	const MachineOperand &MO = MI->getOperand(OpNum);

	switch (MO.getType()) {
	case MachineOperand::MO_Register:
	O << "%" << StringRef(getRegisterName(MO.getReg())).lower();
	break;
	case MachineOperand::MO_Immediate:
	O << (int)MO.getImm();
	break;
	default:
	llvm_unreachable("<unknown operand type>");
	}
	}

	// PrintAsmOperand - Print out an operand for an inline asm expression.
	bool VEAsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
	const char *ExtraCode, raw_ostream &O) {
	if (ExtraCode && ExtraCode[0]) {
	if (ExtraCode[1] != 0)
	return true; // Unknown modifier.

	switch (ExtraCode[0]) {
	default:
	// See if this is a generic print operand
	return AsmPrinter::PrintAsmOperand(MI, OpNo, ExtraCode, O);
	case 'r':
	case 'v':
	break;
	}
	}

	printOperand(MI, OpNo, O);

	return false;
	}

	bool VEAsmPrinter::PrintAsmMemoryOperand(const MachineInstr *MI, unsigned OpNo,
	const char *ExtraCode,
	raw_ostream &O) {
	if (ExtraCode && ExtraCode[0])
	return true; // Unknown modifier

	if (MI->getOperand(OpNo+1).isImm() &&
	MI->getOperand(OpNo+1).getImm() == 0) {
	// don't print "+0"
	} else {
	printOperand(MI, OpNo+1, O);
	}
	if (MI->getOperand(OpNo).isImm() &&
	MI->getOperand(OpNo).getImm() == 0) {
	if (MI->getOperand(OpNo+1).isImm() &&
	MI->getOperand(OpNo+1).getImm() == 0) {
	O << "0";
	} else {
	// don't print "(0)"
	}
	} else {
	O << "(";
	printOperand(MI, OpNo, O);
	O << ")";
	}
	return false;
	}

	char VEAsmPrinter::ID = 0;

	INITIALIZE_PASS(VEAsmPrinter, "ve-asm-printer", "VE Assembly Printer", false,
	false)

	// Force static initialization.
	extern "C" LLVM_ABI LLVM_EXTERNAL_VISIBILITY void LLVMInitializeVEAsmPrinter() {
	RegisterAsmPrinter<VEAsmPrinter> X(getTheVETarget());
	}