140 lines
4.5 KiB
C++
140 lines
4.5 KiB
C++
//=-- LanaiMCInstLower.cpp - Convert Lanai 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 Lanai MachineInstrs to their corresponding
|
|
// MCInst records.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "LanaiMCInstLower.h"
|
|
|
|
#include "MCTargetDesc/LanaiBaseInfo.h"
|
|
#include "MCTargetDesc/LanaiMCExpr.h"
|
|
#include "llvm/ADT/SmallString.h"
|
|
#include "llvm/CodeGen/AsmPrinter.h"
|
|
#include "llvm/CodeGen/MachineBasicBlock.h"
|
|
#include "llvm/CodeGen/MachineInstr.h"
|
|
#include "llvm/IR/Constants.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"
|
|
|
|
using namespace llvm;
|
|
|
|
MCSymbol *
|
|
LanaiMCInstLower::GetGlobalAddressSymbol(const MachineOperand &MO) const {
|
|
return Printer.getSymbol(MO.getGlobal());
|
|
}
|
|
|
|
MCSymbol *
|
|
LanaiMCInstLower::GetBlockAddressSymbol(const MachineOperand &MO) const {
|
|
return Printer.GetBlockAddressSymbol(MO.getBlockAddress());
|
|
}
|
|
|
|
MCSymbol *
|
|
LanaiMCInstLower::GetExternalSymbolSymbol(const MachineOperand &MO) const {
|
|
return Printer.GetExternalSymbolSymbol(MO.getSymbolName());
|
|
}
|
|
|
|
MCSymbol *LanaiMCInstLower::GetJumpTableSymbol(const MachineOperand &MO) const {
|
|
SmallString<256> Name;
|
|
raw_svector_ostream(Name) << Printer.MAI->getPrivateGlobalPrefix() << "JTI"
|
|
<< Printer.getFunctionNumber() << '_'
|
|
<< MO.getIndex();
|
|
// Create a symbol for the name.
|
|
return Ctx.getOrCreateSymbol(Name.str());
|
|
}
|
|
|
|
MCSymbol *
|
|
LanaiMCInstLower::GetConstantPoolIndexSymbol(const MachineOperand &MO) const {
|
|
SmallString<256> Name;
|
|
raw_svector_ostream(Name) << Printer.MAI->getPrivateGlobalPrefix() << "CPI"
|
|
<< Printer.getFunctionNumber() << '_'
|
|
<< MO.getIndex();
|
|
// Create a symbol for the name.
|
|
return Ctx.getOrCreateSymbol(Name.str());
|
|
}
|
|
|
|
MCOperand LanaiMCInstLower::LowerSymbolOperand(const MachineOperand &MO,
|
|
MCSymbol *Sym) const {
|
|
LanaiMCExpr::VariantKind Kind;
|
|
|
|
switch (MO.getTargetFlags()) {
|
|
case LanaiII::MO_NO_FLAG:
|
|
Kind = LanaiMCExpr::VK_Lanai_None;
|
|
break;
|
|
case LanaiII::MO_ABS_HI:
|
|
Kind = LanaiMCExpr::VK_Lanai_ABS_HI;
|
|
break;
|
|
case LanaiII::MO_ABS_LO:
|
|
Kind = LanaiMCExpr::VK_Lanai_ABS_LO;
|
|
break;
|
|
default:
|
|
llvm_unreachable("Unknown target flag on GV operand");
|
|
}
|
|
|
|
const MCExpr *Expr =
|
|
MCSymbolRefExpr::create(Sym, MCSymbolRefExpr::VK_None, Ctx);
|
|
if (!MO.isJTI() && MO.getOffset())
|
|
Expr = MCBinaryExpr::createAdd(
|
|
Expr, MCConstantExpr::create(MO.getOffset(), Ctx), Ctx);
|
|
Expr = LanaiMCExpr::create(Kind, Expr, Ctx);
|
|
return MCOperand::createExpr(Expr);
|
|
}
|
|
|
|
void LanaiMCInstLower::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;
|
|
switch (MO.getType()) {
|
|
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_RegisterMask:
|
|
continue;
|
|
case MachineOperand::MO_GlobalAddress:
|
|
MCOp = LowerSymbolOperand(MO, GetGlobalAddressSymbol(MO));
|
|
break;
|
|
case MachineOperand::MO_BlockAddress:
|
|
MCOp = LowerSymbolOperand(MO, GetBlockAddressSymbol(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;
|
|
default:
|
|
MI->print(errs());
|
|
llvm_unreachable("unknown operand type");
|
|
}
|
|
|
|
OutMI.addOperand(MCOp);
|
|
}
|
|
}
|