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https://github.com/c64scene-ar/llvm-6502.git
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7521964d28
This starts merging MCSection and MCSectionData. There are a few issues with the current split between MCSection and MCSectionData. * It optimizes the the not as important case. We want the production of .o files to be really fast, but the split puts the information used for .o emission in a separate data structure. * The ELF/COFF/MachO hierarchy is not represented in MCSectionData, leading to some ad-hoc ways to represent the various flags. * It makes it harder to remember where each item is. The attached patch starts merging the two by moving the alignment from MCSectionData to MCSection. Most of the patch is actually just dropping 'const', since MCSectionData is mutable, but MCSection was not. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@237936 91177308-0d34-0410-b5e6-96231b3b80d8
78 lines
2.9 KiB
C++
78 lines
2.9 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 LLVM_LIB_TARGET_MIPS_MCTARGETDESC_MIPSELFSTREAMER_H
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#define LLVM_LIB_TARGET_MIPS_MCTARGETDESC_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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SmallVector<MCSymbol*, 4> Labels;
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public:
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MipsELFStreamer(MCContext &Context, MCAsmBackend &MAB, raw_pwrite_stream &OS,
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MCCodeEmitter *Emitter)
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: MCELFStreamer(Context, MAB, OS, Emitter) {
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RegInfoRecord = new MipsRegInfoRecord(this, Context);
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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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/// Overriding this function allows us to record all labels that should be
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/// marked as microMIPS. Based on this data marking is done in
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/// EmitInstruction.
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void EmitLabel(MCSymbol *Symbol) override;
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/// Overriding this function allows us to dismiss all labels that are
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/// candidates for marking as microMIPS when .section directive is processed.
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void SwitchSection(MCSection *Section,
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const MCExpr *Subsection = nullptr) override;
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/// Overriding this function allows us to dismiss all labels that are
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/// candidates for marking as microMIPS when .word directive is emitted.
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void EmitValueImpl(const MCExpr *Value, unsigned Size,
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const SMLoc &Loc) 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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/// Mark labels as microMIPS, if necessary for the subtarget.
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void createPendingLabelRelocs();
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};
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MCELFStreamer *createMipsELFStreamer(MCContext &Context, MCAsmBackend &MAB,
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raw_pwrite_stream &OS,
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MCCodeEmitter *Emitter, bool RelaxAll);
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} // namespace llvm.
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#endif
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