forked from OSchip/llvm-project
111 lines
4.3 KiB
C++
111 lines
4.3 KiB
C++
//===- lib/MC/MCNullStreamer.cpp - Dummy Streamer Implementation ----------===//
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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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#include "llvm/MC/MCStreamer.h"
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#include "llvm/MC/MCContext.h"
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#include "llvm/MC/MCInst.h"
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#include "llvm/MC/MCSectionMachO.h"
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#include "llvm/MC/MCSymbol.h"
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using namespace llvm;
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namespace {
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class MCNullStreamer : public MCStreamer {
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public:
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MCNullStreamer(MCContext &Context) : MCStreamer(Context) {}
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/// @name MCStreamer Interface
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/// @{
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void ChangeSection(const MCSection *Section,
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const MCExpr *Subsection) override {
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}
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void EmitLabel(MCSymbol *Symbol) override {
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assert(Symbol->isUndefined() && "Cannot define a symbol twice!");
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assert(getCurrentSection().first &&"Cannot emit before setting section!");
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AssignSection(Symbol, getCurrentSection().first);
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}
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void EmitDebugLabel(MCSymbol *Symbol) override {
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EmitLabel(Symbol);
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}
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void EmitAssemblerFlag(MCAssemblerFlag Flag) override {}
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void EmitThumbFunc(MCSymbol *Func) override {}
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void EmitAssignment(MCSymbol *Symbol, const MCExpr *Value) override {}
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void EmitWeakReference(MCSymbol *Alias, const MCSymbol *Symbol) override {}
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bool EmitSymbolAttribute(MCSymbol *Symbol,
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MCSymbolAttr Attribute) override {
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return true;
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}
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void EmitSymbolDesc(MCSymbol *Symbol, unsigned DescValue) override {}
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void BeginCOFFSymbolDef(const MCSymbol *Symbol) override {}
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void EmitCOFFSymbolStorageClass(int StorageClass) override {}
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void EmitCOFFSymbolType(int Type) override {}
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void EndCOFFSymbolDef() override {}
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void EmitCOFFSecRel32(MCSymbol const *Symbol) override {}
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void EmitELFSize(MCSymbol *Symbol, const MCExpr *Value) override {}
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void EmitCommonSymbol(MCSymbol *Symbol, uint64_t Size,
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unsigned ByteAlignment) override {}
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void EmitLocalCommonSymbol(MCSymbol *Symbol, uint64_t Size,
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unsigned ByteAlignment) override {}
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void EmitZerofill(const MCSection *Section, MCSymbol *Symbol = nullptr,
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uint64_t Size = 0, unsigned ByteAlignment = 0) override {}
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void EmitTBSSSymbol(const MCSection *Section, MCSymbol *Symbol,
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uint64_t Size, unsigned ByteAlignment) override {}
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void EmitBytes(StringRef Data) override {}
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void EmitValueImpl(const MCExpr *Value, unsigned Size,
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const SMLoc &Loc = SMLoc()) override {}
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void EmitULEB128Value(const MCExpr *Value) override {}
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void EmitSLEB128Value(const MCExpr *Value) override {}
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void EmitGPRel32Value(const MCExpr *Value) override {}
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void EmitValueToAlignment(unsigned ByteAlignment, int64_t Value = 0,
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unsigned ValueSize = 1,
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unsigned MaxBytesToEmit = 0) override {}
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void EmitCodeAlignment(unsigned ByteAlignment,
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unsigned MaxBytesToEmit = 0) override {}
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bool EmitValueToOffset(const MCExpr *Offset,
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unsigned char Value = 0) override { return false; }
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void EmitFileDirective(StringRef Filename) override {}
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unsigned EmitDwarfFileDirective(unsigned FileNo, StringRef Directory,
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StringRef Filename,
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unsigned CUID = 0) override {
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return 0;
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}
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void EmitDwarfLocDirective(unsigned FileNo, unsigned Line,
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unsigned Column, unsigned Flags,
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unsigned Isa, unsigned Discriminator,
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StringRef FileName) override {}
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void EmitInstruction(const MCInst &Inst, const MCSubtargetInfo&) override {}
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void EmitBundleAlignMode(unsigned AlignPow2) override {}
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void EmitBundleLock(bool AlignToEnd) override {}
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void EmitBundleUnlock() override {}
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void FinishImpl() override {}
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void EmitCFIEndProcImpl(MCDwarfFrameInfo &Frame) override {
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RecordProcEnd(Frame);
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}
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};
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}
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MCStreamer *llvm::createNullStreamer(MCContext &Context) {
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return new MCNullStreamer(Context);
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}
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