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//===-------- MipsELFStreamer.h - ELF Object Output -----------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This is a custom MCELFStreamer which allows us to insert some hooks before
// emitting data into an actual object file.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_LIB_TARGET_MIPS_MCTARGETDESC_MIPSELFSTREAMER_H
#define LLVM_LIB_TARGET_MIPS_MCTARGETDESC_MIPSELFSTREAMER_H
#include "MipsOptionRecord.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/MC/MCELFStreamer.h"
#include <memory>
namespace llvm {
class MCAsmBackend;
class MCCodeEmitter;
class MCContext;
class MCSubtargetInfo;
class MipsELFStreamer : public MCELFStreamer {
SmallVector<std::unique_ptr<MipsOptionRecord>, 8> MipsOptionRecords;
MipsRegInfoRecord *RegInfoRecord;
SmallVector<MCSymbol*, 4> Labels;
public:
MipsELFStreamer(MCContext &Context, MCAsmBackend &MAB, raw_ostream &OS,
MCCodeEmitter *Emitter, const MCSubtargetInfo &STI)
: MCELFStreamer(Context, MAB, OS, Emitter) {
RegInfoRecord = new MipsRegInfoRecord(this, Context);
MipsOptionRecords.push_back(
std::unique_ptr<MipsRegInfoRecord>(RegInfoRecord));
}
/// Overriding this function allows us to add arbitrary behaviour before the
/// \p Inst is actually emitted. For example, we can inspect the operands and
/// gather sufficient information that allows us to reason about the register
/// usage for the translation unit.
void EmitInstruction(const MCInst &Inst, const MCSubtargetInfo &STI) override;
/// Overriding this function allows us to record all labels that should be
/// marked as microMIPS. Based on this data marking is done in
/// EmitInstruction.
void EmitLabel(MCSymbol *Symbol) override;
/// Overriding this function allows us to dismiss all labels that are
/// candidates for marking as microMIPS when .section directive is processed.
void SwitchSection(const MCSection *Section,
const MCExpr *Subsection = nullptr) override;
/// Overriding this function allows us to dismiss all labels that are
/// candidates for marking as microMIPS when .word directive is emitted.
void EmitValueImpl(const MCExpr *Value, unsigned Size,
const SMLoc &Loc) override;
/// Emits all the option records stored up until the point it's called.
void EmitMipsOptionRecords();
};
MCELFStreamer *createMipsELFStreamer(MCContext &Context, MCAsmBackend &MAB,
raw_ostream &OS, MCCodeEmitter *Emitter,
const MCSubtargetInfo &STI, bool RelaxAll);
} // namespace llvm.
#endif
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