f785676f2a
all of the features in the current working draft of the upcoming C++ standard, provisionally named C++1y. The code generator's performance is greatly increased, and the loop auto-vectorizer is now enabled at -Os and -O2 in addition to -O3. The PowerPC backend has made several major improvements to code generation quality and compile time, and the X86, SPARC, ARM32, Aarch64 and SystemZ backends have all seen major feature work. Release notes for llvm and clang can be found here: <http://llvm.org/releases/3.4/docs/ReleaseNotes.html> <http://llvm.org/releases/3.4/tools/clang/docs/ReleaseNotes.html> MFC after: 1 month
119 lines
4.5 KiB
C++
119 lines
4.5 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, 0) {}
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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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AssignSection(Symbol, 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 bool EmitSymbolAttribute(MCSymbol *Symbol, MCSymbolAttr Attribute){
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return true;
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}
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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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}
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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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