X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=include%2Fllvm%2FMC%2FMCObjectStreamer.h;h=2e3aa7e570668d5e104526dc70ea3774750c3a25;hb=7da5357acaa0e90e6af1a5cbfa88e422d697631c;hp=c4f5e348b23a4e4a001ba8cf223942cbc36cb153;hpb=e23930543c0de0adcfec00cd18e9243ad812a167;p=oota-llvm.git

diff --git a/include/llvm/MC/MCObjectStreamer.h b/include/llvm/MC/MCObjectStreamer.h
index c4f5e348b23..2e3aa7e5706 100644
--- a/include/llvm/MC/MCObjectStreamer.h
+++ b/include/llvm/MC/MCObjectStreamer.h
@@ -10,17 +10,21 @@
 #ifndef LLVM_MC_MCOBJECTSTREAMER_H
 #define LLVM_MC_MCOBJECTSTREAMER_H
 
+#include "llvm/ADT/SmallVector.h"
+#include "llvm/MC/MCAssembler.h"
+#include "llvm/MC/MCSection.h"
 #include "llvm/MC/MCStreamer.h"
 
 namespace llvm {
 class MCAssembler;
 class MCCodeEmitter;
-class MCSectionData;
+class MCSubtargetInfo;
 class MCExpr;
 class MCFragment;
 class MCDataFragment;
-class TargetAsmBackend;
+class MCAsmBackend;
 class raw_ostream;
+class raw_pwrite_stream;
 
 /// \brief Streaming object file generation interface.
 ///
@@ -31,46 +35,110 @@ class raw_ostream;
 /// implementation.
 class MCObjectStreamer : public MCStreamer {
   MCAssembler *Assembler;
-  MCSectionData *CurSectionData;
+  MCSection::iterator CurInsertionPoint;
+  bool EmitEHFrame;
+  bool EmitDebugFrame;
+  SmallVector<MCSymbol *, 2> PendingLabels;
 
-  virtual void EmitInstToData(const MCInst &Inst) = 0;
+  virtual void EmitInstToData(const MCInst &Inst, const MCSubtargetInfo&) = 0;
+  void EmitCFIStartProcImpl(MCDwarfFrameInfo &Frame) override;
+  void EmitCFIEndProcImpl(MCDwarfFrameInfo &Frame) override;
 
 protected:
-  MCObjectStreamer(MCContext &Context, TargetAsmBackend &TAB,
-                   raw_ostream &_OS, MCCodeEmitter *_Emitter,
-                   bool _PadSectionToAlignment);
-  ~MCObjectStreamer();
+  MCObjectStreamer(MCContext &Context, MCAsmBackend &TAB, raw_pwrite_stream &OS,
+                   MCCodeEmitter *Emitter);
+  ~MCObjectStreamer() override;
 
-  MCSectionData *getCurrentSectionData() const {
-    return CurSectionData;
-  }
+public:
+  /// state management
+  void reset() override;
+
+  /// Object streamers require the integrated assembler.
+  bool isIntegratedAssemblerRequired() const override { return true; }
 
+  void EmitFrames(MCAsmBackend *MAB);
+  void EmitCFISections(bool EH, bool Debug) override;
+
+protected:
   MCFragment *getCurrentFragment() const;
 
+  void insert(MCFragment *F) {
+    flushPendingLabels(F);
+    MCSection *CurSection = getCurrentSectionOnly();
+    CurSection->getFragmentList().insert(CurInsertionPoint, F);
+    F->setParent(CurSection);
+  }
+
   /// Get a data fragment to write into, creating a new one if the current
   /// fragment is not a data fragment.
-  MCDataFragment *getOrCreateDataFragment() const;
+  MCDataFragment *getOrCreateDataFragment();
 
-  const MCExpr *AddValueSymbols(const MCExpr *Value);
+  bool changeSectionImpl(MCSection *Section, const MCExpr *Subsection);
+
+  /// If any labels have been emitted but not assigned fragments, ensure that
+  /// they get assigned, either to F if possible or to a new data fragment.
+  /// Optionally, it is also possible to provide an offset \p FOffset, which
+  /// will be used as a symbol offset within the fragment.
+  void flushPendingLabels(MCFragment *F, uint64_t FOffset = 0);
 
 public:
+  void visitUsedSymbol(const MCSymbol &Sym) override;
+
   MCAssembler &getAssembler() { return *Assembler; }
 
-  /// @name MCStreamer Interface
+  /// \name MCStreamer Interface
   /// @{
 
-  virtual void EmitLabel(MCSymbol *Symbol);
-  virtual void EmitValue(const MCExpr *Value, unsigned Size,unsigned AddrSpace);
-  virtual void EmitULEB128Value(const MCExpr *Value, unsigned AddrSpace = 0);
-  virtual void EmitSLEB128Value(const MCExpr *Value, unsigned AddrSpace = 0);
-  virtual void EmitWeakReference(MCSymbol *Alias, const MCSymbol *Symbol);
-  virtual void SwitchSection(const MCSection *Section);
-  virtual void EmitInstruction(const MCInst &Inst);
-  virtual void EmitInstToFragment(const MCInst &Inst);
-  virtual void EmitValueToOffset(const MCExpr *Offset, unsigned char Value);
-  virtual void Finish();
-
-  /// @}
+  void EmitLabel(MCSymbol *Symbol) override;
+  void EmitAssignment(MCSymbol *Symbol, const MCExpr *Value) override;
+  void EmitValueImpl(const MCExpr *Value, unsigned Size,
+                     SMLoc Loc = SMLoc()) override;
+  void EmitULEB128Value(const MCExpr *Value) override;
+  void EmitSLEB128Value(const MCExpr *Value) override;
+  void EmitWeakReference(MCSymbol *Alias, const MCSymbol *Symbol) override;
+  void ChangeSection(MCSection *Section, const MCExpr *Subsection) override;
+  void EmitInstruction(const MCInst &Inst, const MCSubtargetInfo& STI) override;
+
+  /// \brief Emit an instruction to a special fragment, because this instruction
+  /// can change its size during relaxation.
+  virtual void EmitInstToFragment(const MCInst &Inst, const MCSubtargetInfo &);
+
+  void EmitBundleAlignMode(unsigned AlignPow2) override;
+  void EmitBundleLock(bool AlignToEnd) override;
+  void EmitBundleUnlock() override;
+  void EmitBytes(StringRef Data) override;
+  void EmitValueToAlignment(unsigned ByteAlignment, int64_t Value = 0,
+                            unsigned ValueSize = 1,
+                            unsigned MaxBytesToEmit = 0) override;
+  void EmitCodeAlignment(unsigned ByteAlignment,
+                         unsigned MaxBytesToEmit = 0) override;
+  bool EmitValueToOffset(const MCExpr *Offset, unsigned char Value) override;
+  void EmitDwarfLocDirective(unsigned FileNo, unsigned Line,
+                             unsigned Column, unsigned Flags,
+                             unsigned Isa, unsigned Discriminator,
+                             StringRef FileName) override;
+  void EmitDwarfAdvanceLineAddr(int64_t LineDelta, const MCSymbol *LastLabel,
+                                const MCSymbol *Label,
+                                unsigned PointerSize);
+  void EmitDwarfAdvanceFrameAddr(const MCSymbol *LastLabel,
+                                 const MCSymbol *Label);
+  void EmitGPRel32Value(const MCExpr *Value) override;
+  void EmitGPRel64Value(const MCExpr *Value) override;
+  void EmitFill(uint64_t NumBytes, uint8_t FillValue) override;
+  void EmitZeros(uint64_t NumBytes) override;
+  void FinishImpl() override;
+
+  /// Emit the absolute difference between two symbols if possible.
+  ///
+  /// Emit the absolute difference between \c Hi and \c Lo, as long as we can
+  /// compute it.  Currently, that requires that both symbols are in the same
+  /// data fragment.  Otherwise, do nothing and return \c false.
+  ///
+  /// \pre Offset of \c Hi is greater than the offset \c Lo.
+  void emitAbsoluteSymbolDiff(const MCSymbol *Hi, const MCSymbol *Lo,
+                              unsigned Size) override;
+
+  bool mayHaveInstructions(MCSection &Sec) const override;
 };
 
 } // end namespace llvm