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https://github.com/c64scene-ar/llvm-6502.git
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This is dead code since PIC16 was removed in 2010. The result was an odd mix, where some parts would carefully pass it along and others would assert it was zero (most of the object streamer for example). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@185436 91177308-0d34-0410-b5e6-96231b3b80d8
124 lines
4.6 KiB
C++
124 lines
4.6 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(SK_NullStreamer, Context) {}
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/// @name MCStreamer Interface
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/// @{
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virtual void InitToTextSection() {
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}
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virtual void InitSections() {
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}
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virtual void ChangeSection(const MCSection *Section,
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const MCExpr *Subsection) {
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}
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virtual void EmitLabel(MCSymbol *Symbol) {
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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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Symbol->setSection(*getCurrentSection().first);
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}
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virtual void EmitDebugLabel(MCSymbol *Symbol) {
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EmitLabel(Symbol);
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}
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virtual void EmitAssemblerFlag(MCAssemblerFlag Flag) {}
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virtual void EmitThumbFunc(MCSymbol *Func) {}
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virtual void EmitAssignment(MCSymbol *Symbol, const MCExpr *Value) {}
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virtual void EmitWeakReference(MCSymbol *Alias, const MCSymbol *Symbol){}
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virtual void EmitDwarfAdvanceLineAddr(int64_t LineDelta,
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const MCSymbol *LastLabel,
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const MCSymbol *Label,
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unsigned PointerSize) {}
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virtual void EmitSymbolAttribute(MCSymbol *Symbol, MCSymbolAttr Attribute){}
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virtual void EmitSymbolDesc(MCSymbol *Symbol, unsigned DescValue) {}
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virtual void BeginCOFFSymbolDef(const MCSymbol *Symbol) {}
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virtual void EmitCOFFSymbolStorageClass(int StorageClass) {}
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virtual void EmitCOFFSymbolType(int Type) {}
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virtual void EndCOFFSymbolDef() {}
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virtual void EmitCOFFSecRel32(MCSymbol const *Symbol) {}
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virtual void EmitELFSize(MCSymbol *Symbol, const MCExpr *Value) {}
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virtual void EmitCommonSymbol(MCSymbol *Symbol, uint64_t Size,
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unsigned ByteAlignment) {}
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virtual void EmitLocalCommonSymbol(MCSymbol *Symbol, uint64_t Size,
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unsigned ByteAlignment) {}
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virtual void EmitZerofill(const MCSection *Section, MCSymbol *Symbol = 0,
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uint64_t Size = 0, unsigned ByteAlignment = 0) {}
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virtual void EmitTBSSSymbol(const MCSection *Section, MCSymbol *Symbol,
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uint64_t Size, unsigned ByteAlignment) {}
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virtual void EmitBytes(StringRef Data) {}
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virtual void EmitValueImpl(const MCExpr *Value, unsigned Size) {}
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virtual void EmitULEB128Value(const MCExpr *Value) {}
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virtual void EmitSLEB128Value(const MCExpr *Value) {}
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virtual void EmitGPRel32Value(const MCExpr *Value) {}
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virtual void EmitValueToAlignment(unsigned ByteAlignment, int64_t Value = 0,
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unsigned ValueSize = 1,
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unsigned MaxBytesToEmit = 0) {}
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virtual void EmitCodeAlignment(unsigned ByteAlignment,
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unsigned MaxBytesToEmit = 0) {}
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virtual bool EmitValueToOffset(const MCExpr *Offset,
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unsigned char Value = 0) { return false; }
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virtual void EmitFileDirective(StringRef Filename) {}
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virtual bool EmitDwarfFileDirective(unsigned FileNo, StringRef Directory,
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StringRef Filename, unsigned CUID = 0) {
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return false;
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}
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virtual 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) {}
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virtual void EmitInstruction(const MCInst &Inst) {}
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virtual void EmitBundleAlignMode(unsigned AlignPow2) {}
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virtual void EmitBundleLock(bool AlignToEnd) {}
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virtual void EmitBundleUnlock() {}
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virtual void FinishImpl() {}
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virtual void EmitCFIEndProcImpl(MCDwarfFrameInfo &Frame) {
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RecordProcEnd(Frame);
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}
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/// @}
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static bool classof(const MCStreamer *S) {
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return S->getKind() == SK_NullStreamer;
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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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