mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-25 12:12:47 +01:00
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
103 lines
3.2 KiB
C++
103 lines
3.2 KiB
C++
//===-- SystemZMCInstLower.cpp - Lower MachineInstr to 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
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "SystemZMCInstLower.h"
|
|
#include "SystemZAsmPrinter.h"
|
|
#include "llvm/IR/Mangler.h"
|
|
#include "llvm/MC/MCExpr.h"
|
|
#include "llvm/MC/MCInst.h"
|
|
#include "llvm/MC/MCStreamer.h"
|
|
|
|
using namespace llvm;
|
|
|
|
// Return the VK_* enumeration for MachineOperand target flags Flags.
|
|
static MCSymbolRefExpr::VariantKind getVariantKind(unsigned Flags) {
|
|
switch (Flags & SystemZII::MO_SYMBOL_MODIFIER) {
|
|
case 0:
|
|
return MCSymbolRefExpr::VK_None;
|
|
case SystemZII::MO_GOT:
|
|
return MCSymbolRefExpr::VK_GOT;
|
|
case SystemZII::MO_INDNTPOFF:
|
|
return MCSymbolRefExpr::VK_INDNTPOFF;
|
|
}
|
|
llvm_unreachable("Unrecognised MO_ACCESS_MODEL");
|
|
}
|
|
|
|
SystemZMCInstLower::SystemZMCInstLower(MCContext &ctx,
|
|
SystemZAsmPrinter &asmprinter)
|
|
: Ctx(ctx), AsmPrinter(asmprinter) {}
|
|
|
|
const MCExpr *
|
|
SystemZMCInstLower::getExpr(const MachineOperand &MO,
|
|
MCSymbolRefExpr::VariantKind Kind) const {
|
|
const MCSymbol *Symbol;
|
|
bool HasOffset = true;
|
|
switch (MO.getType()) {
|
|
case MachineOperand::MO_MachineBasicBlock:
|
|
Symbol = MO.getMBB()->getSymbol();
|
|
HasOffset = false;
|
|
break;
|
|
|
|
case MachineOperand::MO_GlobalAddress:
|
|
Symbol = AsmPrinter.getSymbol(MO.getGlobal());
|
|
break;
|
|
|
|
case MachineOperand::MO_ExternalSymbol:
|
|
Symbol = AsmPrinter.GetExternalSymbolSymbol(MO.getSymbolName());
|
|
break;
|
|
|
|
case MachineOperand::MO_JumpTableIndex:
|
|
Symbol = AsmPrinter.GetJTISymbol(MO.getIndex());
|
|
HasOffset = false;
|
|
break;
|
|
|
|
case MachineOperand::MO_ConstantPoolIndex:
|
|
Symbol = AsmPrinter.GetCPISymbol(MO.getIndex());
|
|
break;
|
|
|
|
case MachineOperand::MO_BlockAddress:
|
|
Symbol = AsmPrinter.GetBlockAddressSymbol(MO.getBlockAddress());
|
|
break;
|
|
|
|
default:
|
|
llvm_unreachable("unknown operand type");
|
|
}
|
|
const MCExpr *Expr = MCSymbolRefExpr::create(Symbol, Kind, Ctx);
|
|
if (HasOffset)
|
|
if (int64_t Offset = MO.getOffset()) {
|
|
const MCExpr *OffsetExpr = MCConstantExpr::create(Offset, Ctx);
|
|
Expr = MCBinaryExpr::createAdd(Expr, OffsetExpr, Ctx);
|
|
}
|
|
return Expr;
|
|
}
|
|
|
|
MCOperand SystemZMCInstLower::lowerOperand(const MachineOperand &MO) const {
|
|
switch (MO.getType()) {
|
|
case MachineOperand::MO_Register:
|
|
return MCOperand::createReg(MO.getReg());
|
|
|
|
case MachineOperand::MO_Immediate:
|
|
return MCOperand::createImm(MO.getImm());
|
|
|
|
default: {
|
|
MCSymbolRefExpr::VariantKind Kind = getVariantKind(MO.getTargetFlags());
|
|
return MCOperand::createExpr(getExpr(MO, Kind));
|
|
}
|
|
}
|
|
}
|
|
|
|
void SystemZMCInstLower::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);
|
|
// Ignore all implicit register operands.
|
|
if (!MO.isReg() || !MO.isImplicit())
|
|
OutMI.addOperand(lowerOperand(MO));
|
|
}
|
|
}
|