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//===- PPCELFStreamer.h - ELF Object Output --------------------*- 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
//
//===----------------------------------------------------------------------===//
//
// This is a custom MCELFStreamer for PowerPC.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_LIB_TARGET_PPC_MCELFSTREAMER_PPCELFSTREAMER_H
#define LLVM_LIB_TARGET_PPC_MCELFSTREAMER_PPCELFSTREAMER_H
#include "llvm/ADT/SmallVector.h"
#include "llvm/MC/MCELFStreamer.h"
#include <memory>
namespace llvm {
class MCAsmBackend;
class MCCodeEmitter;
class MCContext;
class MCSubtargetInfo;
class PPCELFStreamer : public MCELFStreamer {
// We need to keep track of the last label we emitted (only one) because
// depending on whether the label is on the same line as an aligned
// instruction or not, the label may refer to the instruction or the nop.
MCSymbol *LastLabel;
SMLoc LastLabelLoc;
public:
PPCELFStreamer(MCContext &Context, std::unique_ptr<MCAsmBackend> MAB,
std::unique_ptr<MCObjectWriter> OW,
std::unique_ptr<MCCodeEmitter> Emitter);
void emitInstruction(const MCInst &Inst, const MCSubtargetInfo &STI) override;
// EmitLabel updates LastLabel and LastLabelLoc when a new label is emitted.
void emitLabel(MCSymbol *Symbol, SMLoc Loc = SMLoc()) override;
private:
void emitPrefixedInstruction(const MCInst &Inst, const MCSubtargetInfo &STI);
void emitGOTToPCRelReloc(const MCInst &Inst);
void emitGOTToPCRelLabel(const MCInst &Inst);
};
// Check if the instruction Inst is part of a pair of instructions that make up
// a link time GOT PC Rel optimization.
Optional<bool> isPartOfGOTToPCRelPair(const MCInst &Inst,
const MCSubtargetInfo &STI);
MCELFStreamer *createPPCELFStreamer(MCContext &Context,
std::unique_ptr<MCAsmBackend> MAB,
std::unique_ptr<MCObjectWriter> OW,
std::unique_ptr<MCCodeEmitter> Emitter);
} // end namespace llvm
#endif // LLVM_LIB_TARGET_PPC_MCELFSTREAMER_PPCELFSTREAMER_H
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