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Diffstat (limited to 'contrib/llvm/lib/MC/MCPureStreamer.cpp')
| -rw-r--r-- | contrib/llvm/lib/MC/MCPureStreamer.cpp | 235 |
1 files changed, 0 insertions, 235 deletions
diff --git a/contrib/llvm/lib/MC/MCPureStreamer.cpp b/contrib/llvm/lib/MC/MCPureStreamer.cpp deleted file mode 100644 index f7bf002fbc67..000000000000 --- a/contrib/llvm/lib/MC/MCPureStreamer.cpp +++ /dev/null @@ -1,235 +0,0 @@ -//===- lib/MC/MCPureStreamer.cpp - MC "Pure" Object Output ----------------===// -// -// The LLVM Compiler Infrastructure -// -// This file is distributed under the University of Illinois Open Source -// License. See LICENSE.TXT for details. -// -//===----------------------------------------------------------------------===// - -#include "llvm/MC/MCStreamer.h" -#include "llvm/MC/MCAssembler.h" -#include "llvm/MC/MCCodeEmitter.h" -#include "llvm/MC/MCContext.h" -#include "llvm/MC/MCExpr.h" -#include "llvm/MC/MCObjectFileInfo.h" -#include "llvm/MC/MCObjectStreamer.h" -#include "llvm/MC/MCSymbol.h" -#include "llvm/Support/ErrorHandling.h" - -using namespace llvm; - -namespace { - -class MCPureStreamer : public MCObjectStreamer { -private: - virtual void EmitInstToFragment(const MCInst &Inst); - virtual void EmitInstToData(const MCInst &Inst); - -public: - MCPureStreamer(MCContext &Context, MCAsmBackend &TAB, raw_ostream &OS, - MCCodeEmitter *Emitter) - : MCObjectStreamer(Context, 0, TAB, OS, Emitter) {} - - /// @name MCStreamer Interface - /// @{ - - virtual void InitSections(); - virtual void InitToTextSection(); - virtual void EmitLabel(MCSymbol *Symbol); - virtual void EmitDebugLabel(MCSymbol *Symbol); - virtual void EmitZerofill(const MCSection *Section, MCSymbol *Symbol = 0, - uint64_t Size = 0, unsigned ByteAlignment = 0); - virtual void EmitBytes(StringRef Data); - virtual void EmitValueToAlignment(unsigned ByteAlignment, int64_t Value = 0, - unsigned ValueSize = 1, - unsigned MaxBytesToEmit = 0); - virtual void EmitCodeAlignment(unsigned ByteAlignment, - unsigned MaxBytesToEmit = 0); - virtual bool EmitValueToOffset(const MCExpr *Offset, - unsigned char Value = 0); - virtual void FinishImpl(); - - - virtual bool EmitSymbolAttribute(MCSymbol *Symbol, MCSymbolAttr Attribute) { - report_fatal_error("unsupported directive in pure streamer"); - return false; - } - virtual void EmitAssemblerFlag(MCAssemblerFlag Flag) { - report_fatal_error("unsupported directive in pure streamer"); - } - virtual void EmitTBSSSymbol(const MCSection *Section, MCSymbol *Symbol, - uint64_t Size, unsigned ByteAlignment = 0) { - report_fatal_error("unsupported directive in pure streamer"); - } - virtual void EmitSymbolDesc(MCSymbol *Symbol, unsigned DescValue) { - report_fatal_error("unsupported directive in pure streamer"); - } - virtual void EmitCommonSymbol(MCSymbol *Symbol, uint64_t Size, - unsigned ByteAlignment) { - report_fatal_error("unsupported directive in pure streamer"); - } - virtual void EmitThumbFunc(MCSymbol *Func) { - report_fatal_error("unsupported directive in pure streamer"); - } - virtual void BeginCOFFSymbolDef(const MCSymbol *Symbol) { - report_fatal_error("unsupported directive in pure streamer"); - } - virtual void EmitCOFFSymbolStorageClass(int StorageClass) { - report_fatal_error("unsupported directive in pure streamer"); - } - virtual void EmitCOFFSymbolType(int Type) { - report_fatal_error("unsupported directive in pure streamer"); - } - virtual void EndCOFFSymbolDef() { - report_fatal_error("unsupported directive in pure streamer"); - } - virtual void EmitELFSize(MCSymbol *Symbol, const MCExpr *Value) { - report_fatal_error("unsupported directive in pure streamer"); - } - virtual void EmitLocalCommonSymbol(MCSymbol *Symbol, uint64_t Size, - unsigned ByteAlignment) { - report_fatal_error("unsupported directive in pure streamer"); - } - virtual void EmitFileDirective(StringRef Filename) { - report_fatal_error("unsupported directive in pure streamer"); - } - virtual void EmitIdent(StringRef IdentString) { - report_fatal_error("unsupported directive in pure streamer"); - } - virtual bool EmitDwarfFileDirective(unsigned FileNo, StringRef Directory, - StringRef Filename, unsigned CUID = 0) { - report_fatal_error("unsupported directive in pure streamer"); - } -}; - -} // end anonymous namespace. - -void MCPureStreamer::InitSections() { - InitToTextSection(); -} - -void MCPureStreamer::InitToTextSection() { - SwitchSection(getContext().getObjectFileInfo()->getTextSection()); -} - -void MCPureStreamer::EmitLabel(MCSymbol *Symbol) { - assert(Symbol->isUndefined() && "Cannot define a symbol twice!"); - assert(!Symbol->isVariable() && "Cannot emit a variable symbol!"); - assert(getCurrentSection().first && "Cannot emit before setting section!"); - - AssignSection(Symbol, getCurrentSection().first); - - MCSymbolData &SD = getAssembler().getOrCreateSymbolData(*Symbol); - - // We have to create a new fragment if this is an atom defining symbol, - // fragments cannot span atoms. - if (getAssembler().isSymbolLinkerVisible(SD.getSymbol())) - insert(new MCDataFragment()); - - // FIXME: This is wasteful, we don't necessarily need to create a data - // fragment. Instead, we should mark the symbol as pointing into the data - // fragment if it exists, otherwise we should just queue the label and set its - // fragment pointer when we emit the next fragment. - MCDataFragment *F = getOrCreateDataFragment(); - assert(!SD.getFragment() && "Unexpected fragment on symbol data!"); - SD.setFragment(F); - SD.setOffset(F->getContents().size()); -} - - -void MCPureStreamer::EmitDebugLabel(MCSymbol *Symbol) { - EmitLabel(Symbol); -} - -void MCPureStreamer::EmitZerofill(const MCSection *Section, MCSymbol *Symbol, - uint64_t Size, unsigned ByteAlignment) { - report_fatal_error("not yet implemented in pure streamer"); -} - -void MCPureStreamer::EmitBytes(StringRef Data) { - // TODO: This is exactly the same as WinCOFFStreamer. Consider merging into - // MCObjectStreamer. - getOrCreateDataFragment()->getContents().append(Data.begin(), Data.end()); -} - -void MCPureStreamer::EmitValueToAlignment(unsigned ByteAlignment, - int64_t Value, unsigned ValueSize, - unsigned MaxBytesToEmit) { - // TODO: This is exactly the same as WinCOFFStreamer. Consider merging into - // MCObjectStreamer. - if (MaxBytesToEmit == 0) - MaxBytesToEmit = ByteAlignment; - insert(new MCAlignFragment(ByteAlignment, Value, ValueSize, MaxBytesToEmit)); - - // Update the maximum alignment on the current section if necessary. - if (ByteAlignment > getCurrentSectionData()->getAlignment()) - getCurrentSectionData()->setAlignment(ByteAlignment); -} - -void MCPureStreamer::EmitCodeAlignment(unsigned ByteAlignment, - unsigned MaxBytesToEmit) { - // TODO: This is exactly the same as WinCOFFStreamer. Consider merging into - // MCObjectStreamer. - if (MaxBytesToEmit == 0) - MaxBytesToEmit = ByteAlignment; - MCAlignFragment *F = new MCAlignFragment(ByteAlignment, 0, 1, MaxBytesToEmit); - insert(F); - F->setEmitNops(true); - - // Update the maximum alignment on the current section if necessary. - if (ByteAlignment > getCurrentSectionData()->getAlignment()) - getCurrentSectionData()->setAlignment(ByteAlignment); -} - -bool MCPureStreamer::EmitValueToOffset(const MCExpr *Offset, - unsigned char Value) { - insert(new MCOrgFragment(*Offset, Value)); - return false; -} - -void MCPureStreamer::EmitInstToFragment(const MCInst &Inst) { - MCRelaxableFragment *IF = new MCRelaxableFragment(Inst); - insert(IF); - - // Add the fixups and data. - // - // FIXME: Revisit this design decision when relaxation is done, we may be - // able to get away with not storing any extra data in the MCInst. - SmallVector<MCFixup, 4> Fixups; - SmallString<256> Code; - raw_svector_ostream VecOS(Code); - getAssembler().getEmitter().EncodeInstruction(Inst, VecOS, Fixups); - VecOS.flush(); - - IF->getContents() = Code; - IF->getFixups() = Fixups; -} - -void MCPureStreamer::EmitInstToData(const MCInst &Inst) { - MCDataFragment *DF = getOrCreateDataFragment(); - - SmallVector<MCFixup, 4> Fixups; - SmallString<256> Code; - raw_svector_ostream VecOS(Code); - getAssembler().getEmitter().EncodeInstruction(Inst, VecOS, Fixups); - VecOS.flush(); - - // Add the fixups and data. - for (unsigned i = 0, e = Fixups.size(); i != e; ++i) { - Fixups[i].setOffset(Fixups[i].getOffset() + DF->getContents().size()); - DF->getFixups().push_back(Fixups[i]); - } - DF->getContents().append(Code.begin(), Code.end()); -} - -void MCPureStreamer::FinishImpl() { - // FIXME: Handle DWARF tables? - - this->MCObjectStreamer::FinishImpl(); -} - -MCStreamer *llvm::createPureStreamer(MCContext &Context, MCAsmBackend &MAB, - raw_ostream &OS, MCCodeEmitter *CE) { - return new MCPureStreamer(Context, MAB, OS, CE); -} |