diff options
Diffstat (limited to 'contrib/llvm/lib/Target/Hexagon/HexagonMCInstLower.cpp')
| -rw-r--r-- | contrib/llvm/lib/Target/Hexagon/HexagonMCInstLower.cpp | 173 |
1 files changed, 173 insertions, 0 deletions
diff --git a/contrib/llvm/lib/Target/Hexagon/HexagonMCInstLower.cpp b/contrib/llvm/lib/Target/Hexagon/HexagonMCInstLower.cpp new file mode 100644 index 000000000000..072501d8260d --- /dev/null +++ b/contrib/llvm/lib/Target/Hexagon/HexagonMCInstLower.cpp @@ -0,0 +1,173 @@ +//===- HexagonMCInstLower.cpp - Convert Hexagon MachineInstr to an MCInst -===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +// This file contains code to lower Hexagon MachineInstrs to their corresponding +// MCInst records. +// +//===----------------------------------------------------------------------===// + +#include "Hexagon.h" +#include "HexagonAsmPrinter.h" +#include "HexagonMachineFunctionInfo.h" +#include "MCTargetDesc/HexagonMCInstrInfo.h" + +#include "llvm/CodeGen/MachineBasicBlock.h" +#include "llvm/IR/Constants.h" +#include "llvm/IR/Mangler.h" +#include "llvm/MC/MCContext.h" +#include "llvm/MC/MCExpr.h" +#include "llvm/MC/MCInst.h" + +using namespace llvm; + +namespace llvm { + void HexagonLowerToMC(const MCInstrInfo &MCII, const MachineInstr *MI, + MCInst &MCB, HexagonAsmPrinter &AP); +} + +static MCOperand GetSymbolRef(const MachineOperand &MO, const MCSymbol *Symbol, + HexagonAsmPrinter &Printer, bool MustExtend) { + MCContext &MC = Printer.OutContext; + const MCExpr *ME; + + // Populate the relocation type based on Hexagon target flags + // set on an operand + MCSymbolRefExpr::VariantKind RelocationType; + switch (MO.getTargetFlags() & ~HexagonII::HMOTF_ConstExtended) { + default: + RelocationType = MCSymbolRefExpr::VK_None; + break; + case HexagonII::MO_PCREL: + RelocationType = MCSymbolRefExpr::VK_Hexagon_PCREL; + break; + case HexagonII::MO_GOT: + RelocationType = MCSymbolRefExpr::VK_GOT; + break; + case HexagonII::MO_LO16: + RelocationType = MCSymbolRefExpr::VK_Hexagon_LO16; + break; + case HexagonII::MO_HI16: + RelocationType = MCSymbolRefExpr::VK_Hexagon_HI16; + break; + case HexagonII::MO_GPREL: + RelocationType = MCSymbolRefExpr::VK_Hexagon_GPREL; + break; + case HexagonII::MO_GDGOT: + RelocationType = MCSymbolRefExpr::VK_Hexagon_GD_GOT; + break; + case HexagonII::MO_GDPLT: + RelocationType = MCSymbolRefExpr::VK_Hexagon_GD_PLT; + break; + case HexagonII::MO_IE: + RelocationType = MCSymbolRefExpr::VK_Hexagon_IE; + break; + case HexagonII::MO_IEGOT: + RelocationType = MCSymbolRefExpr::VK_Hexagon_IE_GOT; + break; + case HexagonII::MO_TPREL: + RelocationType = MCSymbolRefExpr::VK_TPREL; + break; + } + + ME = MCSymbolRefExpr::create(Symbol, RelocationType, MC); + + if (!MO.isJTI() && MO.getOffset()) + ME = MCBinaryExpr::createAdd(ME, MCConstantExpr::create(MO.getOffset(), MC), + MC); + + ME = HexagonMCExpr::create(ME, MC); + HexagonMCInstrInfo::setMustExtend(*ME, MustExtend); + return MCOperand::createExpr(ME); +} + +// Create an MCInst from a MachineInstr +void llvm::HexagonLowerToMC(const MCInstrInfo &MCII, const MachineInstr *MI, + MCInst &MCB, HexagonAsmPrinter &AP) { + if (MI->getOpcode() == Hexagon::ENDLOOP0) { + HexagonMCInstrInfo::setInnerLoop(MCB); + return; + } + if (MI->getOpcode() == Hexagon::ENDLOOP1) { + HexagonMCInstrInfo::setOuterLoop(MCB); + return; + } + MCInst *MCI = new (AP.OutContext) MCInst; + MCI->setOpcode(MI->getOpcode()); + assert(MCI->getOpcode() == static_cast<unsigned>(MI->getOpcode()) && + "MCI opcode should have been set on construction"); + + for (unsigned i = 0, e = MI->getNumOperands(); i < e; i++) { + const MachineOperand &MO = MI->getOperand(i); + MCOperand MCO; + bool MustExtend = MO.getTargetFlags() & HexagonII::HMOTF_ConstExtended; + + switch (MO.getType()) { + default: + MI->print(errs()); + llvm_unreachable("unknown operand type"); + case MachineOperand::MO_RegisterMask: + continue; + case MachineOperand::MO_Register: + // Ignore all implicit register operands. + if (MO.isImplicit()) + continue; + MCO = MCOperand::createReg(MO.getReg()); + break; + case MachineOperand::MO_FPImmediate: { + APFloat Val = MO.getFPImm()->getValueAPF(); + // FP immediates are used only when setting GPRs, so they may be dealt + // with like regular immediates from this point on. + auto Expr = HexagonMCExpr::create( + MCConstantExpr::create(*Val.bitcastToAPInt().getRawData(), + AP.OutContext), + AP.OutContext); + HexagonMCInstrInfo::setMustExtend(*Expr, MustExtend); + MCO = MCOperand::createExpr(Expr); + break; + } + case MachineOperand::MO_Immediate: { + auto Expr = HexagonMCExpr::create( + MCConstantExpr::create(MO.getImm(), AP.OutContext), AP.OutContext); + HexagonMCInstrInfo::setMustExtend(*Expr, MustExtend); + MCO = MCOperand::createExpr(Expr); + break; + } + case MachineOperand::MO_MachineBasicBlock: { + MCExpr const *Expr = MCSymbolRefExpr::create(MO.getMBB()->getSymbol(), + AP.OutContext); + Expr = HexagonMCExpr::create(Expr, AP.OutContext); + HexagonMCInstrInfo::setMustExtend(*Expr, MustExtend); + MCO = MCOperand::createExpr(Expr); + break; + } + case MachineOperand::MO_GlobalAddress: + MCO = GetSymbolRef(MO, AP.getSymbol(MO.getGlobal()), AP, MustExtend); + break; + case MachineOperand::MO_ExternalSymbol: + MCO = GetSymbolRef(MO, AP.GetExternalSymbolSymbol(MO.getSymbolName()), + AP, MustExtend); + break; + case MachineOperand::MO_JumpTableIndex: + MCO = GetSymbolRef(MO, AP.GetJTISymbol(MO.getIndex()), AP, MustExtend); + break; + case MachineOperand::MO_ConstantPoolIndex: + MCO = GetSymbolRef(MO, AP.GetCPISymbol(MO.getIndex()), AP, MustExtend); + break; + case MachineOperand::MO_BlockAddress: + MCO = GetSymbolRef(MO, AP.GetBlockAddressSymbol(MO.getBlockAddress()), AP, + MustExtend); + break; + } + + MCI->addOperand(MCO); + } + AP.HexagonProcessInstruction(*MCI, *MI); + HexagonMCInstrInfo::extendIfNeeded(AP.OutContext, MCII, MCB, *MCI); + MCB.addOperand(MCOperand::createInst(MCI)); +} |