| //===-- MSP430MCInstLower.cpp - Convert MSP430 MachineInstr to an MCInst --===// |
| // |
| // 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 code to lower MSP430 MachineInstrs to their corresponding |
| // MCInst records. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "MSP430MCInstLower.h" |
| #include "llvm/ADT/SmallString.h" |
| #include "llvm/CodeGen/AsmPrinter.h" |
| #include "llvm/CodeGen/MachineBasicBlock.h" |
| #include "llvm/CodeGen/MachineInstr.h" |
| #include "llvm/IR/DataLayout.h" |
| #include "llvm/IR/Mangler.h" |
| #include "llvm/MC/MCAsmInfo.h" |
| #include "llvm/MC/MCContext.h" |
| #include "llvm/MC/MCExpr.h" |
| #include "llvm/MC/MCInst.h" |
| #include "llvm/Support/ErrorHandling.h" |
| #include "llvm/Support/raw_ostream.h" |
| #include "llvm/Target/TargetMachine.h" |
| using namespace llvm; |
| |
| MCSymbol *MSP430MCInstLower:: |
| GetGlobalAddressSymbol(const MachineOperand &MO) const { |
| switch (MO.getTargetFlags()) { |
| default: llvm_unreachable("Unknown target flag on GV operand"); |
| case 0: break; |
| } |
| |
| return Printer.getSymbol(MO.getGlobal()); |
| } |
| |
| MCSymbol *MSP430MCInstLower:: |
| GetExternalSymbolSymbol(const MachineOperand &MO) const { |
| switch (MO.getTargetFlags()) { |
| default: llvm_unreachable("Unknown target flag on GV operand"); |
| case 0: break; |
| } |
| |
| return Printer.GetExternalSymbolSymbol(MO.getSymbolName()); |
| } |
| |
| MCSymbol *MSP430MCInstLower:: |
| GetJumpTableSymbol(const MachineOperand &MO) const { |
| const DataLayout &DL = Printer.getDataLayout(); |
| SmallString<256> Name; |
| raw_svector_ostream(Name) << DL.getPrivateGlobalPrefix() << "JTI" |
| << Printer.getFunctionNumber() << '_' |
| << MO.getIndex(); |
| |
| switch (MO.getTargetFlags()) { |
| default: llvm_unreachable("Unknown target flag on GV operand"); |
| case 0: break; |
| } |
| |
| // Create a symbol for the name. |
| return Ctx.getOrCreateSymbol(Name); |
| } |
| |
| MCSymbol *MSP430MCInstLower:: |
| GetConstantPoolIndexSymbol(const MachineOperand &MO) const { |
| const DataLayout &DL = Printer.getDataLayout(); |
| SmallString<256> Name; |
| raw_svector_ostream(Name) << DL.getPrivateGlobalPrefix() << "CPI" |
| << Printer.getFunctionNumber() << '_' |
| << MO.getIndex(); |
| |
| switch (MO.getTargetFlags()) { |
| default: llvm_unreachable("Unknown target flag on GV operand"); |
| case 0: break; |
| } |
| |
| // Create a symbol for the name. |
| return Ctx.getOrCreateSymbol(Name); |
| } |
| |
| MCSymbol *MSP430MCInstLower:: |
| GetBlockAddressSymbol(const MachineOperand &MO) const { |
| switch (MO.getTargetFlags()) { |
| default: llvm_unreachable("Unknown target flag on GV operand"); |
| case 0: break; |
| } |
| |
| return Printer.GetBlockAddressSymbol(MO.getBlockAddress()); |
| } |
| |
| MCOperand MSP430MCInstLower:: |
| LowerSymbolOperand(const MachineOperand &MO, MCSymbol *Sym) const { |
| // FIXME: We would like an efficient form for this, so we don't have to do a |
| // lot of extra uniquing. |
| const MCExpr *Expr = MCSymbolRefExpr::create(Sym, Ctx); |
| |
| switch (MO.getTargetFlags()) { |
| default: llvm_unreachable("Unknown target flag on GV operand"); |
| case 0: break; |
| } |
| |
| if (!MO.isJTI() && MO.getOffset()) |
| Expr = MCBinaryExpr::createAdd(Expr, |
| MCConstantExpr::create(MO.getOffset(), Ctx), |
| Ctx); |
| return MCOperand::createExpr(Expr); |
| } |
| |
| #define GET_REGINFO_ENUM |
| #include "MSP430GenRegisterInfo.inc" |
| |
| void MSP430MCInstLower::Lower(const MachineInstr *MI, MCInst &OutMI) const { |
| OutMI.setOpcode(MI->getOpcode()); |
| |
| for (const MachineOperand &MO : MI->operands()) { |
| MCOperand MCOp; |
| switch (MO.getType()) { |
| default: |
| MI->print(errs()); |
| llvm_unreachable("unknown operand type"); |
| case MachineOperand::MO_Register: |
| // Ignore all implicit register operands. |
| if (MO.isImplicit()) continue; |
| MCOp = MCOperand::createReg(MO.getReg()); |
| break; |
| case MachineOperand::MO_Immediate: |
| MCOp = MCOperand::createImm(MO.getImm()); |
| break; |
| case MachineOperand::MO_MachineBasicBlock: |
| MCOp = MCOperand::createExpr(MCSymbolRefExpr::create( |
| MO.getMBB()->getSymbol(), Ctx)); |
| break; |
| case MachineOperand::MO_GlobalAddress: |
| MCOp = LowerSymbolOperand(MO, GetGlobalAddressSymbol(MO)); |
| break; |
| case MachineOperand::MO_ExternalSymbol: |
| MCOp = LowerSymbolOperand(MO, GetExternalSymbolSymbol(MO)); |
| break; |
| case MachineOperand::MO_JumpTableIndex: |
| MCOp = LowerSymbolOperand(MO, GetJumpTableSymbol(MO)); |
| break; |
| case MachineOperand::MO_ConstantPoolIndex: |
| MCOp = LowerSymbolOperand(MO, GetConstantPoolIndexSymbol(MO)); |
| break; |
| case MachineOperand::MO_BlockAddress: |
| MCOp = LowerSymbolOperand(MO, GetBlockAddressSymbol(MO)); |
| break; |
| case MachineOperand::MO_RegisterMask: |
| continue; |
| } |
| |
| OutMI.addOperand(MCOp); |
| } |
| } |