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This abstraction allows us to support the various records that can be placed in the .MIPS.options section in the future. We currently use it to record register usage information (the ODK_REGINFO record in our ELF64 spec). Each .MIPS.options record should subclass MipsOptionRecord and provide an implementation of EmitMipsOptionRecord. Patch by Matheus Almeida and Toma Tabacu git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@213522 91177308-0d34-0410-b5e6-96231b3b80d8
59 lines
2.1 KiB
C++
59 lines
2.1 KiB
C++
//===-------- MipsELFStreamer.h - ELF Object Output -----------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This is a custom MCELFStreamer which allows us to insert some hooks before
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// emitting data into an actual object file.
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//
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//===----------------------------------------------------------------------===//
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#ifndef MIPSELFSTREAMER_H
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#define MIPSELFSTREAMER_H
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#include "MipsOptionRecord.h"
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#include "llvm/ADT/SmallVector.h"
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#include "llvm/MC/MCELFStreamer.h"
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#include <memory>
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namespace llvm {
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class MCAsmBackend;
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class MCCodeEmitter;
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class MCContext;
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class MCSubtargetInfo;
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class MipsELFStreamer : public MCELFStreamer {
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SmallVector<std::unique_ptr<MipsOptionRecord>, 8> MipsOptionRecords;
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MipsRegInfoRecord *RegInfoRecord;
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public:
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MipsELFStreamer(MCContext &Context, MCAsmBackend &MAB, raw_ostream &OS,
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MCCodeEmitter *Emitter, const MCSubtargetInfo &STI)
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: MCELFStreamer(Context, MAB, OS, Emitter) {
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RegInfoRecord = new MipsRegInfoRecord(this, Context, STI);
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MipsOptionRecords.push_back(
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std::unique_ptr<MipsRegInfoRecord>(RegInfoRecord));
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}
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/// Overriding this function allows us to add arbitrary behaviour before the
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/// \p Inst is actually emitted. For example, we can inspect the operands and
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/// gather sufficient information that allows us to reason about the register
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/// usage for the translation unit.
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void EmitInstruction(const MCInst &Inst, const MCSubtargetInfo &STI) override;
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/// Emits all the option records stored up until the point it's called.
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void EmitMipsOptionRecords();
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};
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MCELFStreamer *createMipsELFStreamer(MCContext &Context, MCAsmBackend &MAB,
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raw_ostream &OS, MCCodeEmitter *Emitter,
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const MCSubtargetInfo &STI, bool RelaxAll,
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bool NoExecStack);
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} // namespace llvm.
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#endif
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