mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-10-19 11:02:59 +02:00
ae65e281f3
to reflect the new license. We understand that people may be surprised that we're moving the header entirely to discuss the new license. We checked this carefully with the Foundation's lawyer and we believe this is the correct approach. Essentially, all code in the project is now made available by the LLVM project under our new license, so you will see that the license headers include that license only. Some of our contributors have contributed code under our old license, and accordingly, we have retained a copy of our old license notice in the top-level files in each project and repository. llvm-svn: 351636
115 lines
3.7 KiB
C++
115 lines
3.7 KiB
C++
//===- ARCMCInstLower.cpp - ARC MachineInstr to MCInst ----------*- C++ -*-===//
|
|
//
|
|
// 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
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
///
|
|
/// \file
|
|
/// This file contains code to lower ARC MachineInstrs to their
|
|
/// corresponding MCInst records.
|
|
///
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "ARCMCInstLower.h"
|
|
#include "llvm/CodeGen/AsmPrinter.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"
|
|
|
|
using namespace llvm;
|
|
|
|
ARCMCInstLower::ARCMCInstLower(MCContext *C, AsmPrinter &AsmPrinter)
|
|
: Ctx(C), Printer(AsmPrinter) {}
|
|
|
|
MCOperand ARCMCInstLower::LowerSymbolOperand(const MachineOperand &MO,
|
|
MachineOperandType MOTy,
|
|
unsigned Offset) const {
|
|
MCSymbolRefExpr::VariantKind Kind = MCSymbolRefExpr::VK_None;
|
|
const MCSymbol *Symbol;
|
|
|
|
switch (MOTy) {
|
|
case MachineOperand::MO_MachineBasicBlock:
|
|
Symbol = MO.getMBB()->getSymbol();
|
|
break;
|
|
case MachineOperand::MO_GlobalAddress:
|
|
Symbol = Printer.getSymbol(MO.getGlobal());
|
|
Offset += MO.getOffset();
|
|
break;
|
|
case MachineOperand::MO_BlockAddress:
|
|
Symbol = Printer.GetBlockAddressSymbol(MO.getBlockAddress());
|
|
Offset += MO.getOffset();
|
|
break;
|
|
case MachineOperand::MO_ExternalSymbol:
|
|
Symbol = Printer.GetExternalSymbolSymbol(MO.getSymbolName());
|
|
Offset += MO.getOffset();
|
|
break;
|
|
case MachineOperand::MO_JumpTableIndex:
|
|
Symbol = Printer.GetJTISymbol(MO.getIndex());
|
|
break;
|
|
case MachineOperand::MO_ConstantPoolIndex:
|
|
Symbol = Printer.GetCPISymbol(MO.getIndex());
|
|
Offset += MO.getOffset();
|
|
break;
|
|
default:
|
|
llvm_unreachable("<unknown operand type>");
|
|
}
|
|
|
|
assert(Symbol && "Symbol creation failed.\n");
|
|
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);
|
|
}
|
|
|
|
MCOperand ARCMCInstLower::LowerOperand(const MachineOperand &MO,
|
|
unsigned Offset) const {
|
|
MachineOperandType MOTy = MO.getType();
|
|
|
|
switch (MOTy) {
|
|
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() + 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, Offset);
|
|
case MachineOperand::MO_RegisterMask:
|
|
break;
|
|
}
|
|
|
|
return {};
|
|
}
|
|
|
|
void ARCMCInstLower::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);
|
|
|
|
if (MCOp.isValid())
|
|
OutMI.addOperand(MCOp);
|
|
}
|
|
}
|