#ifndef LLVM_MC_MCSTREAMER_H
#define LLVM_MC_MCSTREAMER_H
+#include "llvm/ADT/ArrayRef.h"
#include "llvm/ADT/SmallVector.h"
-#include "llvm/Support/DataTypes.h"
+#include "llvm/MC/MCAssembler.h"
#include "llvm/MC/MCDirectives.h"
#include "llvm/MC/MCDwarf.h"
+#include "llvm/MC/MCWin64EH.h"
+#include "llvm/Support/DataTypes.h"
+#include <string>
namespace llvm {
- class MCAsmInfo;
- class MCCodeEmitter;
- class MCContext;
- class MCExpr;
- class MCInst;
- class MCInstPrinter;
- class MCSection;
- class MCSymbol;
- class StringRef;
- class TargetAsmBackend;
- class TargetLoweringObjectFile;
- class Twine;
- class raw_ostream;
- class formatted_raw_ostream;
-
- /// MCStreamer - Streaming machine code generation interface. This interface
- /// is intended to provide a programatic interface that is very similar to the
- /// level that an assembler .s file provides. It has callbacks to emit bytes,
- /// handle directives, etc. The implementation of this interface retains
- /// state to know what the current section is etc.
- ///
- /// There are multiple implementations of this interface: one for writing out
- /// a .s file, and implementations that write out .o files of various formats.
- ///
- class MCStreamer {
- MCContext &Context;
-
- MCStreamer(const MCStreamer&); // DO NOT IMPLEMENT
- MCStreamer &operator=(const MCStreamer&); // DO NOT IMPLEMENT
-
- void EmitSymbolValue(const MCSymbol *Sym, unsigned Size,
- bool isPCRel, unsigned AddrSpace);
-
- std::vector<MCDwarfFrameInfo> FrameInfos;
- MCDwarfFrameInfo *getCurrentFrameInfo();
- void EnsureValidFrame();
-
- const MCSymbol* LastNonPrivate;
-
- /// SectionStack - This is stack of current and previous section
- /// values saved by PushSection.
- SmallVector<std::pair<const MCSection *,
- const MCSection *>, 4> SectionStack;
-
- protected:
- MCStreamer(MCContext &Ctx);
-
- public:
- virtual ~MCStreamer();
-
- MCContext &getContext() const { return Context; }
-
- unsigned getNumFrameInfos() {
- return FrameInfos.size();
- }
+class MCAsmBackend;
+class MCCodeEmitter;
+class MCContext;
+class MCExpr;
+class MCInst;
+class MCInstPrinter;
+class MCSection;
+class MCStreamer;
+class MCSymbol;
+class StringRef;
+class Twine;
+class raw_ostream;
+class formatted_raw_ostream;
+
+typedef std::pair<const MCSection *, const MCExpr *> MCSectionSubPair;
+
+/// Target specific streamer interface. This is used so that targets can
+/// implement support for target specific assembly directives.
+///
+/// If target foo wants to use this, it should implement 3 classes:
+/// * FooTargetStreamer : public MCTargetStreamer
+/// * FooTargetAsmSreamer : public FooTargetStreamer
+/// * FooTargetELFStreamer : public FooTargetStreamer
+///
+/// FooTargetStreamer should have a pure virtual method for each directive. For
+/// example, for a ".bar symbol_name" directive, it should have
+/// virtual emitBar(const MCSymbol &Symbol) = 0;
+///
+/// The FooTargetAsmSreamer and FooTargetELFStreamer classes implement the
+/// method. The assembly streamer just prints ".bar symbol_name". The object
+/// streamer does whatever is needed to implement .bar in the object file.
+///
+/// In the assembly printer and parser the target streamer can be used by
+/// calling getTargetStreamer and casting it to FooTargetStreamer:
+///
+/// MCTargetStreamer &TS = OutStreamer.getTargetStreamer();
+/// FooTargetStreamer &ATS = static_cast<FooTargetStreamer &>(TS);
+///
+/// The base classes FooTargetAsmSreamer and FooTargetELFStreamer should *never*
+/// be treated differently. Callers should always talk to a FooTargetStreamer.
+class MCTargetStreamer {
+protected:
+ MCStreamer *Streamer;
+
+public:
+ virtual ~MCTargetStreamer();
+ void setStreamer(MCStreamer *S) { Streamer = S; }
+
+ // Allow a target to add behavior to the EmitLabel of MCStreamer.
+ virtual void emitLabel(MCSymbol *Symbol);
+};
+
+// FIXME: declared here because it is used from
+// lib/CodeGen/AsmPrinter/ARMException.cpp.
+class ARMTargetStreamer : public MCTargetStreamer {
+ virtual void anchor();
+public:
+ virtual void emitFnStart() = 0;
+ virtual void emitFnEnd() = 0;
+ virtual void emitCantUnwind() = 0;
+ virtual void emitPersonality(const MCSymbol *Personality) = 0;
+ virtual void emitHandlerData() = 0;
+ virtual void emitSetFP(unsigned FpReg, unsigned SpReg,
+ int64_t Offset = 0) = 0;
+ virtual void emitPad(int64_t Offset) = 0;
+ virtual void emitRegSave(const SmallVectorImpl<unsigned> &RegList,
+ bool isVector) = 0;
+
+ virtual void switchVendor(StringRef Vendor) = 0;
+ virtual void emitAttribute(unsigned Attribute, unsigned Value) = 0;
+ virtual void emitTextAttribute(unsigned Attribute, StringRef String) = 0;
+ virtual void emitIntTextAttribute(unsigned Attribute, unsigned IntValue,
+ StringRef StringValue = "") = 0;
+ virtual void emitFPU(unsigned FPU) = 0;
+ virtual void emitArch(unsigned Arch) = 0;
+ virtual void finishAttributeSection() = 0;
+ virtual void emitInst(uint32_t Inst, char Suffix = '\0') = 0;
+};
+
+/// MCStreamer - Streaming machine code generation interface. This interface
+/// is intended to provide a programatic interface that is very similar to the
+/// level that an assembler .s file provides. It has callbacks to emit bytes,
+/// handle directives, etc. The implementation of this interface retains
+/// state to know what the current section is etc.
+///
+/// There are multiple implementations of this interface: one for writing out
+/// a .s file, and implementations that write out .o files of various formats.
+///
+class MCStreamer {
+ MCContext &Context;
+ OwningPtr<MCTargetStreamer> TargetStreamer;
+
+ MCStreamer(const MCStreamer &) LLVM_DELETED_FUNCTION;
+ MCStreamer &operator=(const MCStreamer &) LLVM_DELETED_FUNCTION;
+
+ bool EmitEHFrame;
+ bool EmitDebugFrame;
+
+ std::vector<MCDwarfFrameInfo> FrameInfos;
+ MCDwarfFrameInfo *getCurrentFrameInfo();
+ MCSymbol *EmitCFICommon();
+ void EnsureValidFrame();
+
+ std::vector<MCWin64EHUnwindInfo *> W64UnwindInfos;
+ MCWin64EHUnwindInfo *CurrentW64UnwindInfo;
+ void setCurrentW64UnwindInfo(MCWin64EHUnwindInfo *Frame);
+ void EnsureValidW64UnwindInfo();
+
+ MCSymbol *LastSymbol;
+
+ // SymbolOrdering - Tracks an index to represent the order
+ // a symbol was emitted in. Zero means we did not emit that symbol.
+ DenseMap<const MCSymbol *, unsigned> SymbolOrdering;
+
+ /// SectionStack - This is stack of current and previous section
+ /// values saved by PushSection.
+ SmallVector<std::pair<MCSectionSubPair, MCSectionSubPair>, 4> SectionStack;
+
+ bool AutoInitSections;
+
+protected:
+ MCStreamer(MCContext &Ctx, MCTargetStreamer *TargetStreamer);
+
+ const MCExpr *BuildSymbolDiff(MCContext &Context, const MCSymbol *A,
+ const MCSymbol *B);
+
+ const MCExpr *ForceExpAbs(const MCExpr *Expr);
+
+ void RecordProcStart(MCDwarfFrameInfo &Frame);
+ virtual void EmitCFIStartProcImpl(MCDwarfFrameInfo &Frame);
+ void RecordProcEnd(MCDwarfFrameInfo &Frame);
+ virtual void EmitCFIEndProcImpl(MCDwarfFrameInfo &CurFrame);
+ void EmitFrames(MCAsmBackend *MAB, bool usingCFI);
+
+ MCWin64EHUnwindInfo *getCurrentW64UnwindInfo() {
+ return CurrentW64UnwindInfo;
+ }
+ void EmitW64Tables();
+
+ virtual void EmitRawTextImpl(StringRef String);
+
+public:
+ virtual ~MCStreamer();
+
+ /// State management
+ ///
+ virtual void reset();
- const MCDwarfFrameInfo &getFrameInfo(unsigned i) {
- return FrameInfos[i];
- }
+ MCContext &getContext() const { return Context; }
- /// @name Assembly File Formatting.
- /// @{
-
- /// isVerboseAsm - Return true if this streamer supports verbose assembly
- /// and if it is enabled.
- virtual bool isVerboseAsm() const { return false; }
-
- /// hasRawTextSupport - Return true if this asm streamer supports emitting
- /// unformatted text to the .s file with EmitRawText.
- virtual bool hasRawTextSupport() const { return false; }
-
- /// AddComment - Add a comment that can be emitted to the generated .s
- /// file if applicable as a QoI issue to make the output of the compiler
- /// more readable. This only affects the MCAsmStreamer, and only when
- /// verbose assembly output is enabled.
- ///
- /// If the comment includes embedded \n's, they will each get the comment
- /// prefix as appropriate. The added comment should not end with a \n.
- virtual void AddComment(const Twine &T) {}
-
- /// GetCommentOS - Return a raw_ostream that comments can be written to.
- /// Unlike AddComment, you are required to terminate comments with \n if you
- /// use this method.
- virtual raw_ostream &GetCommentOS();
-
- /// AddBlankLine - Emit a blank line to a .s file to pretty it up.
- virtual void AddBlankLine() {}
-
- /// @}
-
- /// @name Symbol & Section Management
- /// @{
-
- /// getCurrentSection - Return the current section that the streamer is
- /// emitting code to.
- const MCSection *getCurrentSection() const {
- if (!SectionStack.empty())
- return SectionStack.back().first;
- return NULL;
- }
+ MCTargetStreamer *getTargetStreamer() {
+ return TargetStreamer.get();
+ }
- /// getPreviousSection - Return the previous section that the streamer is
- /// emitting code to.
- const MCSection *getPreviousSection() const {
- if (!SectionStack.empty())
- return SectionStack.back().second;
- return NULL;
- }
+ unsigned getNumFrameInfos() { return FrameInfos.size(); }
- /// ChangeSection - Update streamer for a new active section.
- ///
- /// This is called by PopSection and SwitchSection, if the current
- /// section changes.
- virtual void ChangeSection(const MCSection *) = 0;
-
- /// pushSection - Save the current and previous section on the
- /// section stack.
- void PushSection() {
- SectionStack.push_back(std::make_pair(getCurrentSection(),
- getPreviousSection()));
- }
+ const MCDwarfFrameInfo &getFrameInfo(unsigned i) { return FrameInfos[i]; }
- /// popSection - Restore the current and previous section from
- /// the section stack. Calls ChangeSection as needed.
- ///
- /// Returns false if the stack was empty.
- bool PopSection() {
- if (SectionStack.size() <= 1)
- return false;
- const MCSection *oldSection = SectionStack.pop_back_val().first;
- const MCSection *curSection = SectionStack.back().first;
-
- if (oldSection != curSection)
- ChangeSection(curSection);
- return true;
- }
+ ArrayRef<MCDwarfFrameInfo> getFrameInfos() const { return FrameInfos; }
- /// SwitchSection - Set the current section where code is being emitted to
- /// @p Section. This is required to update CurSection.
- ///
- /// This corresponds to assembler directives like .section, .text, etc.
- void SwitchSection(const MCSection *Section) {
- assert(Section && "Cannot switch to a null section!");
- const MCSection *curSection = SectionStack.back().first;
- SectionStack.back().second = curSection;
- if (Section != curSection) {
- SectionStack.back().first = Section;
- ChangeSection(Section);
- }
- }
+ unsigned getNumW64UnwindInfos() { return W64UnwindInfos.size(); }
- /// InitSections - Create the default sections and set the initial one.
- virtual void InitSections() = 0;
-
- /// EmitLabel - Emit a label for @p Symbol into the current section.
- ///
- /// This corresponds to an assembler statement such as:
- /// foo:
- ///
- /// @param Symbol - The symbol to emit. A given symbol should only be
- /// emitted as a label once, and symbols emitted as a label should never be
- /// used in an assignment.
- virtual void EmitLabel(MCSymbol *Symbol);
-
- virtual void EmitEHSymAttributes(const MCSymbol *Symbol,
- MCSymbol *EHSymbol);
-
- /// EmitAssemblerFlag - Note in the output the specified @p Flag
- virtual void EmitAssemblerFlag(MCAssemblerFlag Flag) = 0;
-
- /// EmitThumbFunc - Note in the output that the specified @p Func is
- /// a Thumb mode function (ARM target only).
- virtual void EmitThumbFunc(MCSymbol *Func) = 0;
-
- /// EmitAssignment - Emit an assignment of @p Value to @p Symbol.
- ///
- /// This corresponds to an assembler statement such as:
- /// symbol = value
- ///
- /// The assignment generates no code, but has the side effect of binding the
- /// value in the current context. For the assembly streamer, this prints the
- /// binding into the .s file.
- ///
- /// @param Symbol - The symbol being assigned to.
- /// @param Value - The value for the symbol.
- virtual void EmitAssignment(MCSymbol *Symbol, const MCExpr *Value) = 0;
-
- /// EmitWeakReference - Emit an weak reference from @p Alias to @p Symbol.
- ///
- /// This corresponds to an assembler statement such as:
- /// .weakref alias, symbol
- ///
- /// @param Alias - The alias that is being created.
- /// @param Symbol - The symbol being aliased.
- virtual void EmitWeakReference(MCSymbol *Alias, const MCSymbol *Symbol) = 0;
-
- /// EmitSymbolAttribute - Add the given @p Attribute to @p Symbol.
- virtual void EmitSymbolAttribute(MCSymbol *Symbol,
- MCSymbolAttr Attribute) = 0;
-
- /// EmitSymbolDesc - Set the @p DescValue for the @p Symbol.
- ///
- /// @param Symbol - The symbol to have its n_desc field set.
- /// @param DescValue - The value to set into the n_desc field.
- virtual void EmitSymbolDesc(MCSymbol *Symbol, unsigned DescValue) = 0;
-
- /// BeginCOFFSymbolDef - Start emitting COFF symbol definition
- ///
- /// @param Symbol - The symbol to have its External & Type fields set.
- virtual void BeginCOFFSymbolDef(const MCSymbol *Symbol) = 0;
-
- /// EmitCOFFSymbolStorageClass - Emit the storage class of the symbol.
- ///
- /// @param StorageClass - The storage class the symbol should have.
- virtual void EmitCOFFSymbolStorageClass(int StorageClass) = 0;
-
- /// EmitCOFFSymbolType - Emit the type of the symbol.
- ///
- /// @param Type - A COFF type identifier (see COFF::SymbolType in X86COFF.h)
- virtual void EmitCOFFSymbolType(int Type) = 0;
-
- /// EndCOFFSymbolDef - Marks the end of the symbol definition.
- virtual void EndCOFFSymbolDef() = 0;
-
- /// EmitELFSize - Emit an ELF .size directive.
- ///
- /// This corresponds to an assembler statement such as:
- /// .size symbol, expression
- ///
- virtual void EmitELFSize(MCSymbol *Symbol, const MCExpr *Value) = 0;
-
- /// EmitCommonSymbol - Emit a common symbol.
- ///
- /// @param Symbol - The common symbol to emit.
- /// @param Size - The size of the common symbol.
- /// @param ByteAlignment - The alignment of the symbol if
- /// non-zero. This must be a power of 2.
- virtual void EmitCommonSymbol(MCSymbol *Symbol, uint64_t Size,
- unsigned ByteAlignment) = 0;
-
- /// EmitLocalCommonSymbol - Emit a local common (.lcomm) symbol.
- ///
- /// @param Symbol - The common symbol to emit.
- /// @param Size - The size of the common symbol.
- virtual void EmitLocalCommonSymbol(MCSymbol *Symbol, uint64_t Size) = 0;
-
- /// EmitZerofill - Emit the zerofill section and an optional symbol.
- ///
- /// @param Section - The zerofill section to create and or to put the symbol
- /// @param Symbol - The zerofill symbol to emit, if non-NULL.
- /// @param Size - The size of the zerofill symbol.
- /// @param ByteAlignment - The alignment of the zerofill symbol if
- /// non-zero. This must be a power of 2 on some targets.
- virtual void EmitZerofill(const MCSection *Section, MCSymbol *Symbol = 0,
- unsigned Size = 0,unsigned ByteAlignment = 0) = 0;
-
- /// EmitTBSSSymbol - Emit a thread local bss (.tbss) symbol.
- ///
- /// @param Section - The thread local common section.
- /// @param Symbol - The thread local common symbol to emit.
- /// @param Size - The size of the symbol.
- /// @param ByteAlignment - The alignment of the thread local common symbol
- /// if non-zero. This must be a power of 2 on some targets.
- virtual void EmitTBSSSymbol(const MCSection *Section, MCSymbol *Symbol,
- uint64_t Size, unsigned ByteAlignment = 0) = 0;
- /// @}
- /// @name Generating Data
- /// @{
-
- /// EmitBytes - Emit the bytes in \arg Data into the output.
- ///
- /// This is used to implement assembler directives such as .byte, .ascii,
- /// etc.
- virtual void EmitBytes(StringRef Data, unsigned AddrSpace) = 0;
-
- /// EmitValue - Emit the expression @p Value into the output as a native
- /// integer of the given @p Size bytes.
- ///
- /// This is used to implement assembler directives such as .word, .quad,
- /// etc.
- ///
- /// @param Value - The value to emit.
- /// @param Size - The size of the integer (in bytes) to emit. This must
- /// match a native machine width.
- virtual void EmitValueImpl(const MCExpr *Value, unsigned Size,
- bool isPCRel, unsigned AddrSpace) = 0;
-
- void EmitValue(const MCExpr *Value, unsigned Size, unsigned AddrSpace = 0);
-
- void EmitPCRelValue(const MCExpr *Value, unsigned Size,
- unsigned AddrSpace = 0);
-
- /// EmitIntValue - Special case of EmitValue that avoids the client having
- /// to pass in a MCExpr for constant integers.
- virtual void EmitIntValue(uint64_t Value, unsigned Size,
- unsigned AddrSpace = 0);
-
- /// EmitAbsValue - Emit the Value, but try to avoid relocations. On MachO
- /// this is done by producing
- /// foo = value
- /// .long foo
- void EmitAbsValue(const MCExpr *Value, unsigned Size,
- unsigned AddrSpace = 0);
-
- virtual void EmitULEB128Value(const MCExpr *Value) = 0;
-
- virtual void EmitSLEB128Value(const MCExpr *Value) = 0;
-
- /// EmitULEB128Value - Special case of EmitULEB128Value that avoids the
- /// client having to pass in a MCExpr for constant integers.
- void EmitULEB128IntValue(uint64_t Value, unsigned AddrSpace = 0);
-
- /// EmitSLEB128Value - Special case of EmitSLEB128Value that avoids the
- /// client having to pass in a MCExpr for constant integers.
- void EmitSLEB128IntValue(int64_t Value, unsigned AddrSpace = 0);
-
- /// EmitSymbolValue - Special case of EmitValue that avoids the client
- /// having to pass in a MCExpr for MCSymbols.
- void EmitSymbolValue(const MCSymbol *Sym, unsigned Size,
- unsigned AddrSpace = 0);
-
- void EmitPCRelSymbolValue(const MCSymbol *Sym, unsigned Size,
- unsigned AddrSpace = 0);
-
- /// EmitGPRel32Value - Emit the expression @p Value into the output as a
- /// gprel32 (32-bit GP relative) value.
- ///
- /// This is used to implement assembler directives such as .gprel32 on
- /// targets that support them.
- virtual void EmitGPRel32Value(const MCExpr *Value);
-
- /// EmitFill - Emit NumBytes bytes worth of the value specified by
- /// FillValue. This implements directives such as '.space'.
- virtual void EmitFill(uint64_t NumBytes, uint8_t FillValue,
- unsigned AddrSpace);
-
- /// EmitZeros - Emit NumBytes worth of zeros. This is a convenience
- /// function that just wraps EmitFill.
- void EmitZeros(uint64_t NumBytes, unsigned AddrSpace) {
- EmitFill(NumBytes, 0, AddrSpace);
- }
+ MCWin64EHUnwindInfo &getW64UnwindInfo(unsigned i) {
+ return *W64UnwindInfos[i];
+ }
+ void generateCompactUnwindEncodings(MCAsmBackend *MAB);
- /// EmitValueToAlignment - Emit some number of copies of @p Value until
- /// the byte alignment @p ByteAlignment is reached.
- ///
- /// If the number of bytes need to emit for the alignment is not a multiple
- /// of @p ValueSize, then the contents of the emitted fill bytes is
- /// undefined.
- ///
- /// This used to implement the .align assembler directive.
- ///
- /// @param ByteAlignment - The alignment to reach. This must be a power of
- /// two on some targets.
- /// @param Value - The value to use when filling bytes.
- /// @param ValueSize - The size of the integer (in bytes) to emit for
- /// @p Value. This must match a native machine width.
- /// @param MaxBytesToEmit - The maximum numbers of bytes to emit, or 0. If
- /// the alignment cannot be reached in this many bytes, no bytes are
- /// emitted.
- virtual void EmitValueToAlignment(unsigned ByteAlignment, int64_t Value = 0,
- unsigned ValueSize = 1,
- unsigned MaxBytesToEmit = 0) = 0;
-
- /// EmitCodeAlignment - Emit nops until the byte alignment @p ByteAlignment
- /// is reached.
- ///
- /// This used to align code where the alignment bytes may be executed. This
- /// can emit different bytes for different sizes to optimize execution.
- ///
- /// @param ByteAlignment - The alignment to reach. This must be a power of
- /// two on some targets.
- /// @param MaxBytesToEmit - The maximum numbers of bytes to emit, or 0. If
- /// the alignment cannot be reached in this many bytes, no bytes are
- /// emitted.
- virtual void EmitCodeAlignment(unsigned ByteAlignment,
- unsigned MaxBytesToEmit = 0) = 0;
-
- /// EmitValueToOffset - Emit some number of copies of @p Value until the
- /// byte offset @p Offset is reached.
- ///
- /// This is used to implement assembler directives such as .org.
- ///
- /// @param Offset - The offset to reach. This may be an expression, but the
- /// expression must be associated with the current section.
- /// @param Value - The value to use when filling bytes.
- virtual void EmitValueToOffset(const MCExpr *Offset,
- unsigned char Value = 0) = 0;
-
- /// @}
-
- /// EmitFileDirective - Switch to a new logical file. This is used to
- /// implement the '.file "foo.c"' assembler directive.
- virtual void EmitFileDirective(StringRef Filename) = 0;
-
- /// EmitDwarfFileDirective - Associate a filename with a specified logical
- /// file number. This implements the DWARF2 '.file 4 "foo.c"' assembler
- /// directive.
- virtual bool EmitDwarfFileDirective(unsigned FileNo,StringRef Filename);
-
- /// EmitDwarfLocDirective - This implements the DWARF2
- // '.loc fileno lineno ...' assembler directive.
- virtual void EmitDwarfLocDirective(unsigned FileNo, unsigned Line,
- unsigned Column, unsigned Flags,
- unsigned Isa,
- unsigned Discriminator,
- StringRef FileName);
-
- virtual void EmitDwarfAdvanceLineAddr(int64_t LineDelta,
- const MCSymbol *LastLabel,
- const MCSymbol *Label) = 0;
-
- virtual void EmitDwarfAdvanceFrameAddr(const MCSymbol *LastLabel,
- const MCSymbol *Label) {
+ /// @name Assembly File Formatting.
+ /// @{
+
+ /// isVerboseAsm - Return true if this streamer supports verbose assembly
+ /// and if it is enabled.
+ virtual bool isVerboseAsm() const { return false; }
+
+ /// hasRawTextSupport - Return true if this asm streamer supports emitting
+ /// unformatted text to the .s file with EmitRawText.
+ virtual bool hasRawTextSupport() const { return false; }
+
+ /// AddComment - Add a comment that can be emitted to the generated .s
+ /// file if applicable as a QoI issue to make the output of the compiler
+ /// more readable. This only affects the MCAsmStreamer, and only when
+ /// verbose assembly output is enabled.
+ ///
+ /// If the comment includes embedded \n's, they will each get the comment
+ /// prefix as appropriate. The added comment should not end with a \n.
+ virtual void AddComment(const Twine &T) {}
+
+ /// GetCommentOS - Return a raw_ostream that comments can be written to.
+ /// Unlike AddComment, you are required to terminate comments with \n if you
+ /// use this method.
+ virtual raw_ostream &GetCommentOS();
+
+ /// AddBlankLine - Emit a blank line to a .s file to pretty it up.
+ virtual void AddBlankLine() {}
+
+ /// @}
+
+ /// @name Symbol & Section Management
+ /// @{
+
+ /// getCurrentSection - Return the current section that the streamer is
+ /// emitting code to.
+ MCSectionSubPair getCurrentSection() const {
+ if (!SectionStack.empty())
+ return SectionStack.back().first;
+ return MCSectionSubPair();
+ }
+
+ /// getPreviousSection - Return the previous section that the streamer is
+ /// emitting code to.
+ MCSectionSubPair getPreviousSection() const {
+ if (!SectionStack.empty())
+ return SectionStack.back().second;
+ return MCSectionSubPair();
+ }
+
+ /// GetSymbolOrder - Returns an index to represent the order
+ /// a symbol was emitted in. (zero if we did not emit that symbol)
+ unsigned GetSymbolOrder(const MCSymbol *Sym) const {
+ return SymbolOrdering.lookup(Sym);
+ }
+
+ /// ChangeSection - Update streamer for a new active section.
+ ///
+ /// This is called by PopSection and SwitchSection, if the current
+ /// section changes.
+ virtual void ChangeSection(const MCSection *, const MCExpr *) = 0;
+
+ /// pushSection - Save the current and previous section on the
+ /// section stack.
+ void PushSection() {
+ SectionStack.push_back(
+ std::make_pair(getCurrentSection(), getPreviousSection()));
+ }
+
+ /// popSection - Restore the current and previous section from
+ /// the section stack. Calls ChangeSection as needed.
+ ///
+ /// Returns false if the stack was empty.
+ bool PopSection() {
+ if (SectionStack.size() <= 1)
+ return false;
+ MCSectionSubPair oldSection = SectionStack.pop_back_val().first;
+ MCSectionSubPair curSection = SectionStack.back().first;
+
+ if (oldSection != curSection)
+ ChangeSection(curSection.first, curSection.second);
+ return true;
+ }
+
+ bool SubSection(const MCExpr *Subsection) {
+ if (SectionStack.empty())
+ return false;
+
+ SwitchSection(SectionStack.back().first.first, Subsection);
+ return true;
+ }
+
+ /// SwitchSection - Set the current section where code is being emitted to
+ /// @p Section. This is required to update CurSection.
+ ///
+ /// This corresponds to assembler directives like .section, .text, etc.
+ void SwitchSection(const MCSection *Section, const MCExpr *Subsection = 0) {
+ assert(Section && "Cannot switch to a null section!");
+ MCSectionSubPair curSection = SectionStack.back().first;
+ SectionStack.back().second = curSection;
+ if (MCSectionSubPair(Section, Subsection) != curSection) {
+ SectionStack.back().first = MCSectionSubPair(Section, Subsection);
+ ChangeSection(Section, Subsection);
}
+ }
+
+ /// SwitchSectionNoChange - Set the current section where code is being
+ /// emitted to @p Section. This is required to update CurSection. This
+ /// version does not call ChangeSection.
+ void SwitchSectionNoChange(const MCSection *Section,
+ const MCExpr *Subsection = 0) {
+ assert(Section && "Cannot switch to a null section!");
+ MCSectionSubPair curSection = SectionStack.back().first;
+ SectionStack.back().second = curSection;
+ if (MCSectionSubPair(Section, Subsection) != curSection)
+ SectionStack.back().first = MCSectionSubPair(Section, Subsection);
+ }
+
+ /// Initialize the streamer.
+ void InitStreamer() {
+ if (AutoInitSections)
+ InitSections();
+ }
+
+ /// Tell this MCStreamer to call InitSections upon initialization.
+ void setAutoInitSections(bool AutoInitSections) {
+ this->AutoInitSections = AutoInitSections;
+ }
+
+ /// InitSections - Create the default sections and set the initial one.
+ virtual void InitSections() = 0;
+
+ /// InitToTextSection - Create a text section and switch the streamer to it.
+ virtual void InitToTextSection() = 0;
+
+ /// AssignSection - Sets the symbol's section.
+ ///
+ /// Each emitted symbol will be tracked in the ordering table,
+ /// so we can sort on them later.
+ void AssignSection(MCSymbol *Symbol, const MCSection *Section);
- void EmitDwarfSetLineAddr(int64_t LineDelta, const MCSymbol *Label,
- int PointerSize);
-
- virtual void EmitCFIStartProc();
- virtual void EmitCFIEndProc();
- virtual void EmitCFIDefCfa(int64_t Register, int64_t Offset);
- virtual void EmitCFIDefCfaOffset(int64_t Offset);
- virtual void EmitCFIDefCfaRegister(int64_t Register);
- virtual void EmitCFIOffset(int64_t Register, int64_t Offset);
- virtual void EmitCFIPersonality(const MCSymbol *Sym, unsigned Encoding);
- virtual void EmitCFILsda(const MCSymbol *Sym, unsigned Encoding);
- virtual void EmitCFIRememberState();
- virtual void EmitCFIRestoreState();
- virtual void EmitCFISameValue(int64_t Register);
- virtual void EmitCFIRelOffset(int64_t Register, int64_t Offset);
- virtual void EmitCFIAdjustCfaOffset(int64_t Adjustment);
-
- /// EmitInstruction - Emit the given @p Instruction into the current
- /// section.
- virtual void EmitInstruction(const MCInst &Inst) = 0;
-
- /// EmitRawText - If this file is backed by a assembly streamer, this dumps
- /// the specified string in the output .s file. This capability is
- /// indicated by the hasRawTextSupport() predicate. By default this aborts.
- virtual void EmitRawText(StringRef String);
- void EmitRawText(const Twine &String);
-
- /// ARM-related methods.
- /// FIXME: Eventually we should have some "target MC streamer" and move
- /// these methods there.
- virtual void EmitFnStart();
- virtual void EmitFnEnd();
- virtual void EmitCantUnwind();
- virtual void EmitPersonality(const MCSymbol *Personality);
- virtual void EmitHandlerData();
- virtual void EmitSetFP(unsigned FpReg, unsigned SpReg, int64_t Offset = 0);
- virtual void EmitPad(int64_t Offset);
- virtual void EmitRegSave(const SmallVectorImpl<unsigned> &RegList,
- bool isVector);
-
- /// Finish - Finish emission of machine code.
- virtual void Finish() = 0;
- };
-
- /// createNullStreamer - Create a dummy machine code streamer, which does
- /// nothing. This is useful for timing the assembler front end.
- MCStreamer *createNullStreamer(MCContext &Ctx);
-
- /// createAsmStreamer - Create a machine code streamer which will print out
- /// assembly for the native target, suitable for compiling with a native
- /// assembler.
- ///
- /// \param InstPrint - If given, the instruction printer to use. If not given
- /// the MCInst representation will be printed. This method takes ownership of
- /// InstPrint.
- ///
- /// \param CE - If given, a code emitter to use to show the instruction
- /// encoding inline with the assembly. This method takes ownership of \arg CE.
- ///
- /// \param TAB - If given, a target asm backend to use to show the fixup
- /// information in conjunction with encoding information. This method takes
- /// ownership of \arg TAB.
- ///
- /// \param ShowInst - Whether to show the MCInst representation inline with
- /// the assembly.
- MCStreamer *createAsmStreamer(MCContext &Ctx, formatted_raw_ostream &OS,
- bool isVerboseAsm,
- bool useLoc,
- MCInstPrinter *InstPrint = 0,
- MCCodeEmitter *CE = 0,
- TargetAsmBackend *TAB = 0,
- bool ShowInst = false);
-
- /// createMachOStreamer - Create a machine code streamer which will generate
- /// Mach-O format object files.
- ///
- /// Takes ownership of \arg TAB and \arg CE.
- MCStreamer *createMachOStreamer(MCContext &Ctx, TargetAsmBackend &TAB,
- raw_ostream &OS, MCCodeEmitter *CE,
- bool RelaxAll = false);
+ /// EmitLabel - Emit a label for @p Symbol into the current section.
+ ///
+ /// This corresponds to an assembler statement such as:
+ /// foo:
+ ///
+ /// @param Symbol - The symbol to emit. A given symbol should only be
+ /// emitted as a label once, and symbols emitted as a label should never be
+ /// used in an assignment.
+ // FIXME: These emission are non-const because we mutate the symbol to
+ // add the section we're emitting it to later.
+ virtual void EmitLabel(MCSymbol *Symbol);
+
+ virtual void EmitDebugLabel(MCSymbol *Symbol);
+
+ virtual void EmitEHSymAttributes(const MCSymbol *Symbol, MCSymbol *EHSymbol);
+
+ /// EmitAssemblerFlag - Note in the output the specified @p Flag.
+ virtual void EmitAssemblerFlag(MCAssemblerFlag Flag) = 0;
+
+ /// EmitLinkerOptions - Emit the given list @p Options of strings as linker
+ /// options into the output.
+ virtual void EmitLinkerOptions(ArrayRef<std::string> Kind) {}
+
+ /// EmitDataRegion - Note in the output the specified region @p Kind.
+ virtual void EmitDataRegion(MCDataRegionType Kind) {}
+
+ /// EmitThumbFunc - Note in the output that the specified @p Func is
+ /// a Thumb mode function (ARM target only).
+ virtual void EmitThumbFunc(MCSymbol *Func) = 0;
+
+ /// getOrCreateSymbolData - Get symbol data for given symbol.
+ virtual MCSymbolData &getOrCreateSymbolData(MCSymbol *Symbol);
+
+ /// EmitAssignment - Emit an assignment of @p Value to @p Symbol.
+ ///
+ /// This corresponds to an assembler statement such as:
+ /// symbol = value
+ ///
+ /// The assignment generates no code, but has the side effect of binding the
+ /// value in the current context. For the assembly streamer, this prints the
+ /// binding into the .s file.
+ ///
+ /// @param Symbol - The symbol being assigned to.
+ /// @param Value - The value for the symbol.
+ virtual void EmitAssignment(MCSymbol *Symbol, const MCExpr *Value) = 0;
+
+ /// EmitWeakReference - Emit an weak reference from @p Alias to @p Symbol.
+ ///
+ /// This corresponds to an assembler statement such as:
+ /// .weakref alias, symbol
+ ///
+ /// @param Alias - The alias that is being created.
+ /// @param Symbol - The symbol being aliased.
+ virtual void EmitWeakReference(MCSymbol *Alias, const MCSymbol *Symbol) = 0;
- /// createWinCOFFStreamer - Create a machine code streamer which will
- /// generate Microsoft COFF format object files.
+ /// EmitSymbolAttribute - Add the given @p Attribute to @p Symbol.
+ virtual bool EmitSymbolAttribute(MCSymbol *Symbol,
+ MCSymbolAttr Attribute) = 0;
+
+ /// EmitSymbolDesc - Set the @p DescValue for the @p Symbol.
///
- /// Takes ownership of \arg TAB and \arg CE.
- MCStreamer *createWinCOFFStreamer(MCContext &Ctx,
- TargetAsmBackend &TAB,
- MCCodeEmitter &CE, raw_ostream &OS,
- bool RelaxAll = false);
+ /// @param Symbol - The symbol to have its n_desc field set.
+ /// @param DescValue - The value to set into the n_desc field.
+ virtual void EmitSymbolDesc(MCSymbol *Symbol, unsigned DescValue) = 0;
- /// createELFStreamer - Create a machine code streamer which will generate
- /// ELF format object files.
- MCStreamer *createELFStreamer(MCContext &Ctx, TargetAsmBackend &TAB,
- raw_ostream &OS, MCCodeEmitter *CE,
- bool RelaxAll, bool NoExecStack);
+ /// BeginCOFFSymbolDef - Start emitting COFF symbol definition
+ ///
+ /// @param Symbol - The symbol to have its External & Type fields set.
+ virtual void BeginCOFFSymbolDef(const MCSymbol *Symbol) = 0;
- /// createLoggingStreamer - Create a machine code streamer which just logs the
- /// API calls and then dispatches to another streamer.
+ /// EmitCOFFSymbolStorageClass - Emit the storage class of the symbol.
///
- /// The new streamer takes ownership of the \arg Child.
- MCStreamer *createLoggingStreamer(MCStreamer *Child, raw_ostream &OS);
+ /// @param StorageClass - The storage class the symbol should have.
+ virtual void EmitCOFFSymbolStorageClass(int StorageClass) = 0;
+
+ /// EmitCOFFSymbolType - Emit the type of the symbol.
+ ///
+ /// @param Type - A COFF type identifier (see COFF::SymbolType in X86COFF.h)
+ virtual void EmitCOFFSymbolType(int Type) = 0;
+
+ /// EndCOFFSymbolDef - Marks the end of the symbol definition.
+ virtual void EndCOFFSymbolDef() = 0;
- /// createPureStreamer - Create a machine code streamer which will generate
- /// "pure" MC object files, for use with MC-JIT and testing tools.
+ /// EmitCOFFSectionIndex - Emits a COFF section index.
///
- /// Takes ownership of \arg TAB and \arg CE.
- MCStreamer *createPureStreamer(MCContext &Ctx, TargetAsmBackend &TAB,
- raw_ostream &OS, MCCodeEmitter *CE);
+ /// @param Symbol - Symbol the section number relocation should point to.
+ virtual void EmitCOFFSectionIndex(MCSymbol const *Symbol);
+
+ /// EmitCOFFSecRel32 - Emits a COFF section relative relocation.
+ ///
+ /// @param Symbol - Symbol the section relative relocation should point to.
+ virtual void EmitCOFFSecRel32(MCSymbol const *Symbol);
+
+ /// EmitELFSize - Emit an ELF .size directive.
+ ///
+ /// This corresponds to an assembler statement such as:
+ /// .size symbol, expression
+ ///
+ virtual void EmitELFSize(MCSymbol *Symbol, const MCExpr *Value) = 0;
+
+ /// EmitCommonSymbol - Emit a common symbol.
+ ///
+ /// @param Symbol - The common symbol to emit.
+ /// @param Size - The size of the common symbol.
+ /// @param ByteAlignment - The alignment of the symbol if
+ /// non-zero. This must be a power of 2.
+ virtual void EmitCommonSymbol(MCSymbol *Symbol, uint64_t Size,
+ unsigned ByteAlignment) = 0;
+
+ /// EmitLocalCommonSymbol - Emit a local common (.lcomm) symbol.
+ ///
+ /// @param Symbol - The common symbol to emit.
+ /// @param Size - The size of the common symbol.
+ /// @param ByteAlignment - The alignment of the common symbol in bytes.
+ virtual void EmitLocalCommonSymbol(MCSymbol *Symbol, uint64_t Size,
+ unsigned ByteAlignment) = 0;
+
+ /// EmitZerofill - Emit the zerofill section and an optional symbol.
+ ///
+ /// @param Section - The zerofill section to create and or to put the symbol
+ /// @param Symbol - The zerofill symbol to emit, if non-NULL.
+ /// @param Size - The size of the zerofill symbol.
+ /// @param ByteAlignment - The alignment of the zerofill symbol if
+ /// non-zero. This must be a power of 2 on some targets.
+ virtual void EmitZerofill(const MCSection *Section, MCSymbol *Symbol = 0,
+ uint64_t Size = 0, unsigned ByteAlignment = 0) = 0;
+
+ /// EmitTBSSSymbol - Emit a thread local bss (.tbss) symbol.
+ ///
+ /// @param Section - The thread local common section.
+ /// @param Symbol - The thread local common symbol to emit.
+ /// @param Size - The size of the symbol.
+ /// @param ByteAlignment - The alignment of the thread local common symbol
+ /// if non-zero. This must be a power of 2 on some targets.
+ virtual void EmitTBSSSymbol(const MCSection *Section, MCSymbol *Symbol,
+ uint64_t Size, unsigned ByteAlignment = 0) = 0;
+
+ /// @}
+ /// @name Generating Data
+ /// @{
+
+ /// EmitBytes - Emit the bytes in \p Data into the output.
+ ///
+ /// This is used to implement assembler directives such as .byte, .ascii,
+ /// etc.
+ virtual void EmitBytes(StringRef Data) = 0;
+
+ /// EmitValue - Emit the expression @p Value into the output as a native
+ /// integer of the given @p Size bytes.
+ ///
+ /// This is used to implement assembler directives such as .word, .quad,
+ /// etc.
+ ///
+ /// @param Value - The value to emit.
+ /// @param Size - The size of the integer (in bytes) to emit. This must
+ /// match a native machine width.
+ virtual void EmitValueImpl(const MCExpr *Value, unsigned Size) = 0;
+
+ void EmitValue(const MCExpr *Value, unsigned Size);
+
+ /// EmitIntValue - Special case of EmitValue that avoids the client having
+ /// to pass in a MCExpr for constant integers.
+ virtual void EmitIntValue(uint64_t Value, unsigned Size);
+
+ /// EmitAbsValue - Emit the Value, but try to avoid relocations. On MachO
+ /// this is done by producing
+ /// foo = value
+ /// .long foo
+ void EmitAbsValue(const MCExpr *Value, unsigned Size);
+
+ virtual void EmitULEB128Value(const MCExpr *Value) = 0;
+
+ virtual void EmitSLEB128Value(const MCExpr *Value) = 0;
+
+ /// EmitULEB128Value - Special case of EmitULEB128Value that avoids the
+ /// client having to pass in a MCExpr for constant integers.
+ void EmitULEB128IntValue(uint64_t Value, unsigned Padding = 0);
+
+ /// EmitSLEB128Value - Special case of EmitSLEB128Value that avoids the
+ /// client having to pass in a MCExpr for constant integers.
+ void EmitSLEB128IntValue(int64_t Value);
+
+ /// EmitSymbolValue - Special case of EmitValue that avoids the client
+ /// having to pass in a MCExpr for MCSymbols.
+ void EmitSymbolValue(const MCSymbol *Sym, unsigned Size);
+
+ /// EmitGPRel64Value - Emit the expression @p Value into the output as a
+ /// gprel64 (64-bit GP relative) value.
+ ///
+ /// This is used to implement assembler directives such as .gpdword on
+ /// targets that support them.
+ virtual void EmitGPRel64Value(const MCExpr *Value);
+
+ /// EmitGPRel32Value - Emit the expression @p Value into the output as a
+ /// gprel32 (32-bit GP relative) value.
+ ///
+ /// This is used to implement assembler directives such as .gprel32 on
+ /// targets that support them.
+ virtual void EmitGPRel32Value(const MCExpr *Value);
+
+ /// EmitFill - Emit NumBytes bytes worth of the value specified by
+ /// FillValue. This implements directives such as '.space'.
+ virtual void EmitFill(uint64_t NumBytes, uint8_t FillValue);
+
+ /// \brief Emit NumBytes worth of zeros.
+ /// This function properly handles data in virtual sections.
+ virtual void EmitZeros(uint64_t NumBytes);
+
+ /// EmitValueToAlignment - Emit some number of copies of @p Value until
+ /// the byte alignment @p ByteAlignment is reached.
+ ///
+ /// If the number of bytes need to emit for the alignment is not a multiple
+ /// of @p ValueSize, then the contents of the emitted fill bytes is
+ /// undefined.
+ ///
+ /// This used to implement the .align assembler directive.
+ ///
+ /// @param ByteAlignment - The alignment to reach. This must be a power of
+ /// two on some targets.
+ /// @param Value - The value to use when filling bytes.
+ /// @param ValueSize - The size of the integer (in bytes) to emit for
+ /// @p Value. This must match a native machine width.
+ /// @param MaxBytesToEmit - The maximum numbers of bytes to emit, or 0. If
+ /// the alignment cannot be reached in this many bytes, no bytes are
+ /// emitted.
+ virtual void EmitValueToAlignment(unsigned ByteAlignment, int64_t Value = 0,
+ unsigned ValueSize = 1,
+ unsigned MaxBytesToEmit = 0) = 0;
+
+ /// EmitCodeAlignment - Emit nops until the byte alignment @p ByteAlignment
+ /// is reached.
+ ///
+ /// This used to align code where the alignment bytes may be executed. This
+ /// can emit different bytes for different sizes to optimize execution.
+ ///
+ /// @param ByteAlignment - The alignment to reach. This must be a power of
+ /// two on some targets.
+ /// @param MaxBytesToEmit - The maximum numbers of bytes to emit, or 0. If
+ /// the alignment cannot be reached in this many bytes, no bytes are
+ /// emitted.
+ virtual void EmitCodeAlignment(unsigned ByteAlignment,
+ unsigned MaxBytesToEmit = 0) = 0;
+
+ /// EmitValueToOffset - Emit some number of copies of @p Value until the
+ /// byte offset @p Offset is reached.
+ ///
+ /// This is used to implement assembler directives such as .org.
+ ///
+ /// @param Offset - The offset to reach. This may be an expression, but the
+ /// expression must be associated with the current section.
+ /// @param Value - The value to use when filling bytes.
+ /// @return false on success, true if the offset was invalid.
+ virtual bool EmitValueToOffset(const MCExpr *Offset,
+ unsigned char Value = 0) = 0;
+
+ /// @}
+
+ /// EmitFileDirective - Switch to a new logical file. This is used to
+ /// implement the '.file "foo.c"' assembler directive.
+ virtual void EmitFileDirective(StringRef Filename) = 0;
+
+ /// Emit the "identifiers" directive. This implements the
+ /// '.ident "version foo"' assembler directive.
+ virtual void EmitIdent(StringRef IdentString) {}
+
+ /// EmitDwarfFileDirective - Associate a filename with a specified logical
+ /// file number. This implements the DWARF2 '.file 4 "foo.c"' assembler
+ /// directive.
+ virtual bool EmitDwarfFileDirective(unsigned FileNo, StringRef Directory,
+ StringRef Filename, unsigned CUID = 0);
+
+ /// EmitDwarfLocDirective - This implements the DWARF2
+ // '.loc fileno lineno ...' assembler directive.
+ virtual void EmitDwarfLocDirective(unsigned FileNo, unsigned Line,
+ unsigned Column, unsigned Flags,
+ unsigned Isa, unsigned Discriminator,
+ StringRef FileName);
+
+ virtual void EmitDwarfAdvanceLineAddr(int64_t LineDelta,
+ const MCSymbol *LastLabel,
+ const MCSymbol *Label,
+ unsigned PointerSize) = 0;
+
+ virtual void EmitDwarfAdvanceFrameAddr(const MCSymbol *LastLabel,
+ const MCSymbol *Label) {}
+
+ void EmitDwarfSetLineAddr(int64_t LineDelta, const MCSymbol *Label,
+ int PointerSize);
+
+ virtual void EmitCompactUnwindEncoding(uint32_t CompactUnwindEncoding);
+ virtual void EmitCFISections(bool EH, bool Debug);
+ void EmitCFIStartProc();
+ void EmitCFIEndProc();
+ virtual void EmitCFIDefCfa(int64_t Register, int64_t Offset);
+ virtual void EmitCFIDefCfaOffset(int64_t Offset);
+ virtual void EmitCFIDefCfaRegister(int64_t Register);
+ virtual void EmitCFIOffset(int64_t Register, int64_t Offset);
+ virtual void EmitCFIPersonality(const MCSymbol *Sym, unsigned Encoding);
+ virtual void EmitCFILsda(const MCSymbol *Sym, unsigned Encoding);
+ virtual void EmitCFIRememberState();
+ virtual void EmitCFIRestoreState();
+ virtual void EmitCFISameValue(int64_t Register);
+ virtual void EmitCFIRestore(int64_t Register);
+ virtual void EmitCFIRelOffset(int64_t Register, int64_t Offset);
+ virtual void EmitCFIAdjustCfaOffset(int64_t Adjustment);
+ virtual void EmitCFIEscape(StringRef Values);
+ virtual void EmitCFISignalFrame();
+ virtual void EmitCFIUndefined(int64_t Register);
+ virtual void EmitCFIRegister(int64_t Register1, int64_t Register2);
+ virtual void EmitCFIWindowSave();
+
+ virtual void EmitWin64EHStartProc(const MCSymbol *Symbol);
+ virtual void EmitWin64EHEndProc();
+ virtual void EmitWin64EHStartChained();
+ virtual void EmitWin64EHEndChained();
+ virtual void EmitWin64EHHandler(const MCSymbol *Sym, bool Unwind,
+ bool Except);
+ virtual void EmitWin64EHHandlerData();
+ virtual void EmitWin64EHPushReg(unsigned Register);
+ virtual void EmitWin64EHSetFrame(unsigned Register, unsigned Offset);
+ virtual void EmitWin64EHAllocStack(unsigned Size);
+ virtual void EmitWin64EHSaveReg(unsigned Register, unsigned Offset);
+ virtual void EmitWin64EHSaveXMM(unsigned Register, unsigned Offset);
+ virtual void EmitWin64EHPushFrame(bool Code);
+ virtual void EmitWin64EHEndProlog();
+
+ /// EmitInstruction - Emit the given @p Instruction into the current
+ /// section.
+ virtual void EmitInstruction(const MCInst &Inst) = 0;
+
+ /// \brief Set the bundle alignment mode from now on in the section.
+ /// The argument is the power of 2 to which the alignment is set. The
+ /// value 0 means turn the bundle alignment off.
+ virtual void EmitBundleAlignMode(unsigned AlignPow2) = 0;
+
+ /// \brief The following instructions are a bundle-locked group.
+ ///
+ /// \param AlignToEnd - If true, the bundle-locked group will be aligned to
+ /// the end of a bundle.
+ virtual void EmitBundleLock(bool AlignToEnd) = 0;
+
+ /// \brief Ends a bundle-locked group.
+ virtual void EmitBundleUnlock() = 0;
+
+ /// EmitRawText - If this file is backed by a assembly streamer, this dumps
+ /// the specified string in the output .s file. This capability is
+ /// indicated by the hasRawTextSupport() predicate. By default this aborts.
+ void EmitRawText(const Twine &String);
+
+ /// Flush - Causes any cached state to be written out.
+ virtual void Flush() {}
+
+ /// FinishImpl - Streamer specific finalization.
+ virtual void FinishImpl() = 0;
+ /// Finish - Finish emission of machine code.
+ void Finish();
+};
+
+/// createNullStreamer - Create a dummy machine code streamer, which does
+/// nothing. This is useful for timing the assembler front end.
+MCStreamer *createNullStreamer(MCContext &Ctx);
+
+/// createAsmStreamer - Create a machine code streamer which will print out
+/// assembly for the native target, suitable for compiling with a native
+/// assembler.
+///
+/// \param InstPrint - If given, the instruction printer to use. If not given
+/// the MCInst representation will be printed. This method takes ownership of
+/// InstPrint.
+///
+/// \param CE - If given, a code emitter to use to show the instruction
+/// encoding inline with the assembly. This method takes ownership of \p CE.
+///
+/// \param TAB - If given, a target asm backend to use to show the fixup
+/// information in conjunction with encoding information. This method takes
+/// ownership of \p TAB.
+///
+/// \param ShowInst - Whether to show the MCInst representation inline with
+/// the assembly.
+MCStreamer *createAsmStreamer(MCContext &Ctx, MCTargetStreamer *TargetStreamer,
+ formatted_raw_ostream &OS, bool isVerboseAsm,
+ bool useLoc, bool useCFI, bool useDwarfDirectory,
+ MCInstPrinter *InstPrint = 0,
+ MCCodeEmitter *CE = 0, MCAsmBackend *TAB = 0,
+ bool ShowInst = false);
+
+/// createMachOStreamer - Create a machine code streamer which will generate
+/// Mach-O format object files.
+///
+/// Takes ownership of \p TAB and \p CE.
+MCStreamer *createMachOStreamer(MCContext &Ctx, MCAsmBackend &TAB,
+ raw_ostream &OS, MCCodeEmitter *CE,
+ bool RelaxAll = false);
+
+/// createWinCOFFStreamer - Create a machine code streamer which will
+/// generate Microsoft COFF format object files.
+///
+/// Takes ownership of \p TAB and \p CE.
+MCStreamer *createWinCOFFStreamer(MCContext &Ctx, MCAsmBackend &TAB,
+ MCCodeEmitter &CE, raw_ostream &OS,
+ bool RelaxAll = false);
+
+/// createELFStreamer - Create a machine code streamer which will generate
+/// ELF format object files.
+MCStreamer *createELFStreamer(MCContext &Ctx, MCTargetStreamer *TargetStreamer,
+ MCAsmBackend &TAB, raw_ostream &OS,
+ MCCodeEmitter *CE, bool RelaxAll,
+ bool NoExecStack);
+
+/// createPureStreamer - Create a machine code streamer which will generate
+/// "pure" MC object files, for use with MC-JIT and testing tools.
+///
+/// Takes ownership of \p TAB and \p CE.
+MCStreamer *createPureStreamer(MCContext &Ctx, MCAsmBackend &TAB,
+ raw_ostream &OS, MCCodeEmitter *CE);
} // end namespace llvm
projects / oota-llvm.git / blobdiff