// MCInst records.
//
//===----------------------------------------------------------------------===//
-
#include "MipsMCInstLower.h"
+#include "MCTargetDesc/MipsBaseInfo.h"
#include "MipsAsmPrinter.h"
#include "MipsInstrInfo.h"
-#include "MipsMCSymbolRefExpr.h"
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/CodeGen/MachineInstr.h"
#include "llvm/CodeGen/MachineOperand.h"
#include "llvm/MC/MCContext.h"
+#include "llvm/MC/MCExpr.h"
#include "llvm/MC/MCInst.h"
#include "llvm/Target/Mangler.h"
+
using namespace llvm;
-MipsMCInstLower::MipsMCInstLower(Mangler *mang, const MachineFunction &mf,
- MipsAsmPrinter &asmprinter)
- : Ctx(mf.getContext()), Mang(mang), AsmPrinter(asmprinter) {}
+MipsMCInstLower::MipsMCInstLower(MipsAsmPrinter &asmprinter)
+ : AsmPrinter(asmprinter) {}
+
+void MipsMCInstLower::Initialize(MCContext *C) {
+ Ctx = C;
+}
MCOperand MipsMCInstLower::LowerSymbolOperand(const MachineOperand &MO,
MachineOperandType MOTy,
unsigned Offset) const {
- MipsMCSymbolRefExpr::VariantKind Kind;
+ MCSymbolRefExpr::VariantKind Kind;
const MCSymbol *Symbol;
switch(MO.getTargetFlags()) {
- default: assert(0 && "Invalid target flag!");
- case MipsII::MO_NO_FLAG: Kind = MipsMCSymbolRefExpr::VK_Mips_None; break;
- case MipsII::MO_GPREL: Kind = MipsMCSymbolRefExpr::VK_Mips_GPREL; break;
- case MipsII::MO_GOT_CALL: Kind = MipsMCSymbolRefExpr::VK_Mips_GOT_CALL; break;
- case MipsII::MO_GOT: Kind = MipsMCSymbolRefExpr::VK_Mips_GOT; break;
- case MipsII::MO_ABS_HI: Kind = MipsMCSymbolRefExpr::VK_Mips_ABS_HI; break;
- case MipsII::MO_ABS_LO: Kind = MipsMCSymbolRefExpr::VK_Mips_ABS_LO; break;
- case MipsII::MO_TLSGD: Kind = MipsMCSymbolRefExpr::VK_Mips_TLSGD; break;
- case MipsII::MO_GOTTPREL: Kind = MipsMCSymbolRefExpr::VK_Mips_GOTTPREL; break;
- case MipsII::MO_TPREL_HI: Kind = MipsMCSymbolRefExpr::VK_Mips_TPREL_HI; break;
- case MipsII::MO_TPREL_LO: Kind = MipsMCSymbolRefExpr::VK_Mips_TPREL_LO; break;
+ default: llvm_unreachable("Invalid target flag!");
+ case MipsII::MO_NO_FLAG: Kind = MCSymbolRefExpr::VK_None; break;
+ case MipsII::MO_GPREL: Kind = MCSymbolRefExpr::VK_Mips_GPREL; break;
+ case MipsII::MO_GOT_CALL: Kind = MCSymbolRefExpr::VK_Mips_GOT_CALL; break;
+ case MipsII::MO_GOT16: Kind = MCSymbolRefExpr::VK_Mips_GOT16; break;
+ case MipsII::MO_GOT: Kind = MCSymbolRefExpr::VK_Mips_GOT; break;
+ case MipsII::MO_ABS_HI: Kind = MCSymbolRefExpr::VK_Mips_ABS_HI; break;
+ case MipsII::MO_ABS_LO: Kind = MCSymbolRefExpr::VK_Mips_ABS_LO; break;
+ case MipsII::MO_TLSGD: Kind = MCSymbolRefExpr::VK_Mips_TLSGD; break;
+ case MipsII::MO_TLSLDM: Kind = MCSymbolRefExpr::VK_Mips_TLSLDM; break;
+ case MipsII::MO_DTPREL_HI: Kind = MCSymbolRefExpr::VK_Mips_DTPREL_HI; break;
+ case MipsII::MO_DTPREL_LO: Kind = MCSymbolRefExpr::VK_Mips_DTPREL_LO; break;
+ case MipsII::MO_GOTTPREL: Kind = MCSymbolRefExpr::VK_Mips_GOTTPREL; break;
+ case MipsII::MO_TPREL_HI: Kind = MCSymbolRefExpr::VK_Mips_TPREL_HI; break;
+ case MipsII::MO_TPREL_LO: Kind = MCSymbolRefExpr::VK_Mips_TPREL_LO; break;
+ case MipsII::MO_GPOFF_HI: Kind = MCSymbolRefExpr::VK_Mips_GPOFF_HI; break;
+ case MipsII::MO_GPOFF_LO: Kind = MCSymbolRefExpr::VK_Mips_GPOFF_LO; break;
+ case MipsII::MO_GOT_DISP: Kind = MCSymbolRefExpr::VK_Mips_GOT_DISP; break;
+ case MipsII::MO_GOT_PAGE: Kind = MCSymbolRefExpr::VK_Mips_GOT_PAGE; break;
+ case MipsII::MO_GOT_OFST: Kind = MCSymbolRefExpr::VK_Mips_GOT_OFST; break;
+ case MipsII::MO_HIGHER: Kind = MCSymbolRefExpr::VK_Mips_HIGHER; break;
+ case MipsII::MO_HIGHEST: Kind = MCSymbolRefExpr::VK_Mips_HIGHEST; break;
+ case MipsII::MO_GOT_HI16: Kind = MCSymbolRefExpr::VK_Mips_GOT_HI16; break;
+ case MipsII::MO_GOT_LO16: Kind = MCSymbolRefExpr::VK_Mips_GOT_LO16; break;
+ case MipsII::MO_CALL_HI16: Kind = MCSymbolRefExpr::VK_Mips_CALL_HI16; break;
+ case MipsII::MO_CALL_LO16: Kind = MCSymbolRefExpr::VK_Mips_CALL_LO16; break;
}
switch (MOTy) {
- case MachineOperand::MO_MachineBasicBlock:
- Symbol = MO.getMBB()->getSymbol();
- break;
-
- case MachineOperand::MO_GlobalAddress:
- Symbol = Mang->getSymbol(MO.getGlobal());
- break;
-
- case MachineOperand::MO_BlockAddress:
- Symbol = AsmPrinter.GetBlockAddressSymbol(MO.getBlockAddress());
- break;
-
- case MachineOperand::MO_ExternalSymbol:
- Symbol = AsmPrinter.GetExternalSymbolSymbol(MO.getSymbolName());
- break;
-
- case MachineOperand::MO_JumpTableIndex:
- Symbol = AsmPrinter.GetJTISymbol(MO.getIndex());
- break;
-
- case MachineOperand::MO_ConstantPoolIndex:
- Symbol = AsmPrinter.GetCPISymbol(MO.getIndex());
- if (MO.getOffset())
- Offset += MO.getOffset();
- break;
-
- default:
- llvm_unreachable("<unknown operand type>");
+ case MachineOperand::MO_MachineBasicBlock:
+ Symbol = MO.getMBB()->getSymbol();
+ break;
+
+ case MachineOperand::MO_GlobalAddress:
+ Symbol = AsmPrinter.getSymbol(MO.getGlobal());
+ Offset += MO.getOffset();
+ break;
+
+ case MachineOperand::MO_BlockAddress:
+ Symbol = AsmPrinter.GetBlockAddressSymbol(MO.getBlockAddress());
+ Offset += MO.getOffset();
+ break;
+
+ case MachineOperand::MO_ExternalSymbol:
+ Symbol = AsmPrinter.GetExternalSymbolSymbol(MO.getSymbolName());
+ Offset += MO.getOffset();
+ break;
+
+ case MachineOperand::MO_JumpTableIndex:
+ Symbol = AsmPrinter.GetJTISymbol(MO.getIndex());
+ break;
+
+ case MachineOperand::MO_ConstantPoolIndex:
+ Symbol = AsmPrinter.GetCPISymbol(MO.getIndex());
+ Offset += MO.getOffset();
+ break;
+
+ default:
+ llvm_unreachable("<unknown operand type>");
}
-
- return MCOperand::CreateExpr(MipsMCSymbolRefExpr::Create(Kind, Symbol, Offset,
- Ctx));
+
+ const MCSymbolRefExpr *MCSym = MCSymbolRefExpr::Create(Symbol, Kind, *Ctx);
+
+ if (!Offset)
+ return MCOperand::CreateExpr(MCSym);
+
+ // Assume offset is never negative.
+ assert(Offset > 0);
+
+ const MCConstantExpr *OffsetExpr = MCConstantExpr::Create(Offset, *Ctx);
+ const MCBinaryExpr *Add = MCBinaryExpr::CreateAdd(MCSym, OffsetExpr, *Ctx);
+ return MCOperand::CreateExpr(Add);
}
-// If target is Mips1, expand double precision load/store to two single
-// precision loads/stores.
-//
-// ldc1 $f0, lo($CPI0_0)($5) gets expanded to the following two instructions:
-// (little endian)
-// lwc1 $f0, lo($CPI0_0)($5) and
-// lwc1 $f1, lo($CPI0_0+4)($5)
-// (big endian)
-// lwc1 $f1, lo($CPI0_0)($5) and
-// lwc1 $f0, lo($CPI0_0+4)($5)
-void MipsMCInstLower::LowerMips1F64LoadStore(const MachineInstr *MI,
- unsigned Opc,
- SmallVector<MCInst, 4>& MCInsts,
- bool isLittle,
- const unsigned *SubReg) const {
- MCInst InstLo, InstHi, DelaySlot;
- unsigned SingleOpc = (Opc == Mips::LDC1 ? Mips::LWC1 : Mips::SWC1);
- unsigned RegLo = isLittle ? *SubReg : *(SubReg + 1);
- unsigned RegHi = isLittle ? *(SubReg + 1) : *SubReg;
- const MachineOperand &MO1 = MI->getOperand(1);
- const MachineOperand &MO2 = MI->getOperand(2);
-
- InstLo.setOpcode(SingleOpc);
- InstLo.addOperand(MCOperand::CreateReg(RegLo));
- InstLo.addOperand(LowerOperand(MO1));
- InstLo.addOperand(LowerOperand(MO2));
- MCInsts.push_back(InstLo);
-
- InstHi.setOpcode(SingleOpc);
- InstHi.addOperand(MCOperand::CreateReg(RegHi));
- InstHi.addOperand(LowerOperand(MO1));
- if (MO2.isImm())// The offset of addr operand is an immediate: e.g. 0($sp)
- InstHi.addOperand(MCOperand::CreateImm(MO2.getImm() + 4));
- else// Otherwise, the offset must be a symbol: e.g. lo($CPI0_0)($5)
- InstHi.addOperand(LowerSymbolOperand(MO2, MO2.getType(), 4));
- MCInsts.push_back(InstHi);
-
- // Need to insert a NOP in LWC1's delay slot.
- if (SingleOpc == Mips::LWC1) {
- DelaySlot.setOpcode(Mips::NOP);
- MCInsts.push_back(DelaySlot);
- }
+/*
+static void CreateMCInst(MCInst& Inst, unsigned Opc, const MCOperand &Opnd0,
+ const MCOperand &Opnd1,
+ const MCOperand &Opnd2 = MCOperand()) {
+ Inst.setOpcode(Opc);
+ Inst.addOperand(Opnd0);
+ Inst.addOperand(Opnd1);
+ if (Opnd2.isValid())
+ Inst.addOperand(Opnd2);
}
+*/
-MCOperand MipsMCInstLower::LowerOperand(const MachineOperand& MO) const {
+MCOperand MipsMCInstLower::LowerOperand(const MachineOperand &MO,
+ unsigned offset) const {
MachineOperandType MOTy = MO.getType();
-
+
switch (MOTy) {
- default:
- assert(0 && "unknown operand type");
- break;
+ default: llvm_unreachable("unknown operand type");
case MachineOperand::MO_Register:
// Ignore all implicit register operands.
if (MO.isImplicit()) break;
return MCOperand::CreateReg(MO.getReg());
case MachineOperand::MO_Immediate:
- return MCOperand::CreateImm(MO.getImm());
+ return MCOperand::CreateImm(MO.getImm() + offset);
case MachineOperand::MO_MachineBasicBlock:
case MachineOperand::MO_GlobalAddress:
case MachineOperand::MO_ExternalSymbol:
case MachineOperand::MO_JumpTableIndex:
case MachineOperand::MO_ConstantPoolIndex:
case MachineOperand::MO_BlockAddress:
- return LowerSymbolOperand(MO, MOTy, 0);
+ return LowerSymbolOperand(MO, MOTy, offset);
+ case MachineOperand::MO_RegisterMask:
+ break;
}
return MCOperand();
void MipsMCInstLower::Lower(const MachineInstr *MI, MCInst &OutMI) const {
OutMI.setOpcode(MI->getOpcode());
-
+
for (unsigned i = 0, e = MI->getNumOperands(); i != e; ++i) {
const MachineOperand &MO = MI->getOperand(i);
MCOperand MCOp = LowerOperand(MO);
OutMI.addOperand(MCOp);
}
}
+
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