MCStreamer.h revision 6f0b181bc70318f8d5d4b9bdead7fc748677fe2a
1//===- MCStreamer.h - High-level Streaming Machine Code Output --*- C++ -*-===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// This file declares the MCStreamer class. 11// 12//===----------------------------------------------------------------------===// 13 14#ifndef LLVM_MC_MCSTREAMER_H 15#define LLVM_MC_MCSTREAMER_H 16 17#include "llvm/Support/DataTypes.h" 18#include "llvm/MC/MCDirectives.h" 19#include "llvm/MC/MCDwarf.h" 20#include "llvm/MC/MCWin64EH.h" 21#include "llvm/ADT/ArrayRef.h" 22#include "llvm/ADT/SmallVector.h" 23 24namespace llvm { 25 class MCAsmBackend; 26 class MCAsmInfo; 27 class MCCodeEmitter; 28 class MCContext; 29 class MCExpr; 30 class MCInst; 31 class MCInstPrinter; 32 class MCSection; 33 class MCSymbol; 34 class StringRef; 35 class TargetLoweringObjectFile; 36 class Twine; 37 class raw_ostream; 38 class formatted_raw_ostream; 39 40 /// MCStreamer - Streaming machine code generation interface. This interface 41 /// is intended to provide a programatic interface that is very similar to the 42 /// level that an assembler .s file provides. It has callbacks to emit bytes, 43 /// handle directives, etc. The implementation of this interface retains 44 /// state to know what the current section is etc. 45 /// 46 /// There are multiple implementations of this interface: one for writing out 47 /// a .s file, and implementations that write out .o files of various formats. 48 /// 49 class MCStreamer { 50 MCContext &Context; 51 52 MCStreamer(const MCStreamer&); // DO NOT IMPLEMENT 53 MCStreamer &operator=(const MCStreamer&); // DO NOT IMPLEMENT 54 55 bool EmitEHFrame; 56 bool EmitDebugFrame; 57 58 std::vector<MCDwarfFrameInfo> FrameInfos; 59 MCDwarfFrameInfo *getCurrentFrameInfo(); 60 void EnsureValidFrame(); 61 62 std::vector<MCWin64EHUnwindInfo *> W64UnwindInfos; 63 MCWin64EHUnwindInfo *CurrentW64UnwindInfo; 64 void setCurrentW64UnwindInfo(MCWin64EHUnwindInfo *Frame); 65 void EnsureValidW64UnwindInfo(); 66 67 MCSymbol* LastSymbol; 68 69 /// SectionStack - This is stack of current and previous section 70 /// values saved by PushSection. 71 SmallVector<std::pair<const MCSection *, 72 const MCSection *>, 4> SectionStack; 73 74 unsigned UniqueCodeBeginSuffix; 75 unsigned UniqueDataBeginSuffix; 76 77 protected: 78 /// Indicator of whether the previous data-or-code indicator was for 79 /// code or not. Used to determine when we need to emit a new indicator. 80 enum DataType { 81 Data, 82 Code, 83 JumpTable8, 84 JumpTable16, 85 JumpTable32 86 }; 87 DataType RegionIndicator; 88 89 90 MCStreamer(MCContext &Ctx); 91 92 const MCExpr *BuildSymbolDiff(MCContext &Context, const MCSymbol *A, 93 const MCSymbol *B); 94 95 const MCExpr *ForceExpAbs(const MCExpr* Expr); 96 97 void EmitFrames(bool usingCFI); 98 99 MCWin64EHUnwindInfo *getCurrentW64UnwindInfo(){return CurrentW64UnwindInfo;} 100 void EmitW64Tables(); 101 102 public: 103 virtual ~MCStreamer(); 104 105 MCContext &getContext() const { return Context; } 106 107 unsigned getNumFrameInfos() { 108 return FrameInfos.size(); 109 } 110 111 const MCDwarfFrameInfo &getFrameInfo(unsigned i) { 112 return FrameInfos[i]; 113 } 114 115 ArrayRef<MCDwarfFrameInfo> getFrameInfos() { 116 return FrameInfos; 117 } 118 119 unsigned getNumW64UnwindInfos() { 120 return W64UnwindInfos.size(); 121 } 122 123 MCWin64EHUnwindInfo &getW64UnwindInfo(unsigned i) { 124 return *W64UnwindInfos[i]; 125 } 126 127 /// @name Assembly File Formatting. 128 /// @{ 129 130 /// isVerboseAsm - Return true if this streamer supports verbose assembly 131 /// and if it is enabled. 132 virtual bool isVerboseAsm() const { return false; } 133 134 /// hasRawTextSupport - Return true if this asm streamer supports emitting 135 /// unformatted text to the .s file with EmitRawText. 136 virtual bool hasRawTextSupport() const { return false; } 137 138 /// AddComment - Add a comment that can be emitted to the generated .s 139 /// file if applicable as a QoI issue to make the output of the compiler 140 /// more readable. This only affects the MCAsmStreamer, and only when 141 /// verbose assembly output is enabled. 142 /// 143 /// If the comment includes embedded \n's, they will each get the comment 144 /// prefix as appropriate. The added comment should not end with a \n. 145 virtual void AddComment(const Twine &T) {} 146 147 /// GetCommentOS - Return a raw_ostream that comments can be written to. 148 /// Unlike AddComment, you are required to terminate comments with \n if you 149 /// use this method. 150 virtual raw_ostream &GetCommentOS(); 151 152 /// AddBlankLine - Emit a blank line to a .s file to pretty it up. 153 virtual void AddBlankLine() {} 154 155 /// @} 156 157 /// @name Symbol & Section Management 158 /// @{ 159 160 /// getCurrentSection - Return the current section that the streamer is 161 /// emitting code to. 162 const MCSection *getCurrentSection() const { 163 if (!SectionStack.empty()) 164 return SectionStack.back().first; 165 return NULL; 166 } 167 168 /// getPreviousSection - Return the previous section that the streamer is 169 /// emitting code to. 170 const MCSection *getPreviousSection() const { 171 if (!SectionStack.empty()) 172 return SectionStack.back().second; 173 return NULL; 174 } 175 176 /// ChangeSection - Update streamer for a new active section. 177 /// 178 /// This is called by PopSection and SwitchSection, if the current 179 /// section changes. 180 virtual void ChangeSection(const MCSection *) = 0; 181 182 /// pushSection - Save the current and previous section on the 183 /// section stack. 184 void PushSection() { 185 SectionStack.push_back(std::make_pair(getCurrentSection(), 186 getPreviousSection())); 187 } 188 189 /// popSection - Restore the current and previous section from 190 /// the section stack. Calls ChangeSection as needed. 191 /// 192 /// Returns false if the stack was empty. 193 bool PopSection() { 194 if (SectionStack.size() <= 1) 195 return false; 196 const MCSection *oldSection = SectionStack.pop_back_val().first; 197 const MCSection *curSection = SectionStack.back().first; 198 199 if (oldSection != curSection) 200 ChangeSection(curSection); 201 return true; 202 } 203 204 /// SwitchSection - Set the current section where code is being emitted to 205 /// @p Section. This is required to update CurSection. 206 /// 207 /// This corresponds to assembler directives like .section, .text, etc. 208 void SwitchSection(const MCSection *Section) { 209 assert(Section && "Cannot switch to a null section!"); 210 const MCSection *curSection = SectionStack.back().first; 211 SectionStack.back().second = curSection; 212 if (Section != curSection) { 213 SectionStack.back().first = Section; 214 ChangeSection(Section); 215 } 216 } 217 218 /// SwitchSectionNoChange - Set the current section where code is being 219 /// emitted to @p Section. This is required to update CurSection. This 220 /// version does not call ChangeSection. 221 void SwitchSectionNoChange(const MCSection *Section) { 222 assert(Section && "Cannot switch to a null section!"); 223 const MCSection *curSection = SectionStack.back().first; 224 SectionStack.back().second = curSection; 225 if (Section != curSection) 226 SectionStack.back().first = Section; 227 } 228 229 /// InitSections - Create the default sections and set the initial one. 230 virtual void InitSections() = 0; 231 232 /// EmitLabel - Emit a label for @p Symbol into the current section. 233 /// 234 /// This corresponds to an assembler statement such as: 235 /// foo: 236 /// 237 /// @param Symbol - The symbol to emit. A given symbol should only be 238 /// emitted as a label once, and symbols emitted as a label should never be 239 /// used in an assignment. 240 virtual void EmitLabel(MCSymbol *Symbol); 241 242 /// EmitDataRegion - Emit a label that marks the beginning of a data 243 /// region. 244 /// On ELF targets, this corresponds to an assembler statement such as: 245 /// $d.1: 246 virtual void EmitDataRegion(); 247 248 /// EmitJumpTable8Region - Emit a label that marks the beginning of a 249 /// jump table composed of 8-bit offsets. 250 /// On ELF targets, this corresponds to an assembler statement such as: 251 /// $d.1: 252 virtual void EmitJumpTable8Region(); 253 254 /// EmitJumpTable16Region - Emit a label that marks the beginning of a 255 /// jump table composed of 16-bit offsets. 256 /// On ELF targets, this corresponds to an assembler statement such as: 257 /// $d.1: 258 virtual void EmitJumpTable16Region(); 259 260 /// EmitJumpTable32Region - Emit a label that marks the beginning of a 261 /// jump table composed of 32-bit offsets. 262 /// On ELF targets, this corresponds to an assembler statement such as: 263 /// $d.1: 264 virtual void EmitJumpTable32Region(); 265 266 /// EmitCodeRegion - Emit a label that marks the beginning of a code 267 /// region. 268 /// On ELF targets, this corresponds to an assembler statement such as: 269 /// $a.1: 270 virtual void EmitCodeRegion(); 271 272 /// ForceCodeRegion - Forcibly sets the current region mode to code. Used 273 /// at function entry points. 274 void ForceCodeRegion() { RegionIndicator = Code; } 275 276 277 virtual void EmitEHSymAttributes(const MCSymbol *Symbol, 278 MCSymbol *EHSymbol); 279 280 /// EmitAssemblerFlag - Note in the output the specified @p Flag 281 virtual void EmitAssemblerFlag(MCAssemblerFlag Flag) = 0; 282 283 /// EmitThumbFunc - Note in the output that the specified @p Func is 284 /// a Thumb mode function (ARM target only). 285 virtual void EmitThumbFunc(MCSymbol *Func) = 0; 286 287 /// EmitAssignment - Emit an assignment of @p Value to @p Symbol. 288 /// 289 /// This corresponds to an assembler statement such as: 290 /// symbol = value 291 /// 292 /// The assignment generates no code, but has the side effect of binding the 293 /// value in the current context. For the assembly streamer, this prints the 294 /// binding into the .s file. 295 /// 296 /// @param Symbol - The symbol being assigned to. 297 /// @param Value - The value for the symbol. 298 virtual void EmitAssignment(MCSymbol *Symbol, const MCExpr *Value) = 0; 299 300 /// EmitWeakReference - Emit an weak reference from @p Alias to @p Symbol. 301 /// 302 /// This corresponds to an assembler statement such as: 303 /// .weakref alias, symbol 304 /// 305 /// @param Alias - The alias that is being created. 306 /// @param Symbol - The symbol being aliased. 307 virtual void EmitWeakReference(MCSymbol *Alias, const MCSymbol *Symbol) = 0; 308 309 /// EmitSymbolAttribute - Add the given @p Attribute to @p Symbol. 310 virtual void EmitSymbolAttribute(MCSymbol *Symbol, 311 MCSymbolAttr Attribute) = 0; 312 313 /// EmitSymbolDesc - Set the @p DescValue for the @p Symbol. 314 /// 315 /// @param Symbol - The symbol to have its n_desc field set. 316 /// @param DescValue - The value to set into the n_desc field. 317 virtual void EmitSymbolDesc(MCSymbol *Symbol, unsigned DescValue) = 0; 318 319 /// BeginCOFFSymbolDef - Start emitting COFF symbol definition 320 /// 321 /// @param Symbol - The symbol to have its External & Type fields set. 322 virtual void BeginCOFFSymbolDef(const MCSymbol *Symbol) = 0; 323 324 /// EmitCOFFSymbolStorageClass - Emit the storage class of the symbol. 325 /// 326 /// @param StorageClass - The storage class the symbol should have. 327 virtual void EmitCOFFSymbolStorageClass(int StorageClass) = 0; 328 329 /// EmitCOFFSymbolType - Emit the type of the symbol. 330 /// 331 /// @param Type - A COFF type identifier (see COFF::SymbolType in X86COFF.h) 332 virtual void EmitCOFFSymbolType(int Type) = 0; 333 334 /// EndCOFFSymbolDef - Marks the end of the symbol definition. 335 virtual void EndCOFFSymbolDef() = 0; 336 337 /// EmitCOFFSecRel32 - Emits a COFF section relative relocation. 338 /// 339 /// @param Symbol - Symbol the section relative realocation should point to. 340 virtual void EmitCOFFSecRel32(MCSymbol const *Symbol); 341 342 /// EmitELFSize - Emit an ELF .size directive. 343 /// 344 /// This corresponds to an assembler statement such as: 345 /// .size symbol, expression 346 /// 347 virtual void EmitELFSize(MCSymbol *Symbol, const MCExpr *Value) = 0; 348 349 /// EmitCommonSymbol - Emit a common symbol. 350 /// 351 /// @param Symbol - The common symbol to emit. 352 /// @param Size - The size of the common symbol. 353 /// @param ByteAlignment - The alignment of the symbol if 354 /// non-zero. This must be a power of 2. 355 virtual void EmitCommonSymbol(MCSymbol *Symbol, uint64_t Size, 356 unsigned ByteAlignment) = 0; 357 358 /// EmitLocalCommonSymbol - Emit a local common (.lcomm) symbol. 359 /// 360 /// @param Symbol - The common symbol to emit. 361 /// @param Size - The size of the common symbol. 362 /// @param ByteAlignment - The alignment of the common symbol in bytes. 363 virtual void EmitLocalCommonSymbol(MCSymbol *Symbol, uint64_t Size, 364 unsigned ByteAlignment) = 0; 365 366 /// EmitZerofill - Emit the zerofill section and an optional symbol. 367 /// 368 /// @param Section - The zerofill section to create and or to put the symbol 369 /// @param Symbol - The zerofill symbol to emit, if non-NULL. 370 /// @param Size - The size of the zerofill symbol. 371 /// @param ByteAlignment - The alignment of the zerofill symbol if 372 /// non-zero. This must be a power of 2 on some targets. 373 virtual void EmitZerofill(const MCSection *Section, MCSymbol *Symbol = 0, 374 unsigned Size = 0,unsigned ByteAlignment = 0) = 0; 375 376 /// EmitTBSSSymbol - Emit a thread local bss (.tbss) symbol. 377 /// 378 /// @param Section - The thread local common section. 379 /// @param Symbol - The thread local common symbol to emit. 380 /// @param Size - The size of the symbol. 381 /// @param ByteAlignment - The alignment of the thread local common symbol 382 /// if non-zero. This must be a power of 2 on some targets. 383 virtual void EmitTBSSSymbol(const MCSection *Section, MCSymbol *Symbol, 384 uint64_t Size, unsigned ByteAlignment = 0) = 0; 385 386 /// @} 387 /// @name Generating Data 388 /// @{ 389 390 /// EmitBytes - Emit the bytes in \arg Data into the output. 391 /// 392 /// This is used to implement assembler directives such as .byte, .ascii, 393 /// etc. 394 virtual void EmitBytes(StringRef Data, unsigned AddrSpace) = 0; 395 396 /// EmitValue - Emit the expression @p Value into the output as a native 397 /// integer of the given @p Size bytes. 398 /// 399 /// This is used to implement assembler directives such as .word, .quad, 400 /// etc. 401 /// 402 /// @param Value - The value to emit. 403 /// @param Size - The size of the integer (in bytes) to emit. This must 404 /// match a native machine width. 405 virtual void EmitValueImpl(const MCExpr *Value, unsigned Size, 406 unsigned AddrSpace) = 0; 407 408 void EmitValue(const MCExpr *Value, unsigned Size, unsigned AddrSpace = 0); 409 410 /// EmitIntValue - Special case of EmitValue that avoids the client having 411 /// to pass in a MCExpr for constant integers. 412 virtual void EmitIntValue(uint64_t Value, unsigned Size, 413 unsigned AddrSpace = 0); 414 415 /// EmitAbsValue - Emit the Value, but try to avoid relocations. On MachO 416 /// this is done by producing 417 /// foo = value 418 /// .long foo 419 void EmitAbsValue(const MCExpr *Value, unsigned Size, 420 unsigned AddrSpace = 0); 421 422 virtual void EmitULEB128Value(const MCExpr *Value) = 0; 423 424 virtual void EmitSLEB128Value(const MCExpr *Value) = 0; 425 426 /// EmitULEB128Value - Special case of EmitULEB128Value that avoids the 427 /// client having to pass in a MCExpr for constant integers. 428 void EmitULEB128IntValue(uint64_t Value, unsigned AddrSpace = 0, 429 unsigned Padding = 0); 430 431 /// EmitSLEB128Value - Special case of EmitSLEB128Value that avoids the 432 /// client having to pass in a MCExpr for constant integers. 433 void EmitSLEB128IntValue(int64_t Value, unsigned AddrSpace = 0); 434 435 /// EmitSymbolValue - Special case of EmitValue that avoids the client 436 /// having to pass in a MCExpr for MCSymbols. 437 void EmitSymbolValue(const MCSymbol *Sym, unsigned Size, 438 unsigned AddrSpace = 0); 439 440 /// EmitGPRel32Value - Emit the expression @p Value into the output as a 441 /// gprel32 (32-bit GP relative) value. 442 /// 443 /// This is used to implement assembler directives such as .gprel32 on 444 /// targets that support them. 445 virtual void EmitGPRel32Value(const MCExpr *Value); 446 447 /// EmitFill - Emit NumBytes bytes worth of the value specified by 448 /// FillValue. This implements directives such as '.space'. 449 virtual void EmitFill(uint64_t NumBytes, uint8_t FillValue, 450 unsigned AddrSpace); 451 452 /// EmitZeros - Emit NumBytes worth of zeros. This is a convenience 453 /// function that just wraps EmitFill. 454 void EmitZeros(uint64_t NumBytes, unsigned AddrSpace) { 455 EmitFill(NumBytes, 0, AddrSpace); 456 } 457 458 459 /// EmitValueToAlignment - Emit some number of copies of @p Value until 460 /// the byte alignment @p ByteAlignment is reached. 461 /// 462 /// If the number of bytes need to emit for the alignment is not a multiple 463 /// of @p ValueSize, then the contents of the emitted fill bytes is 464 /// undefined. 465 /// 466 /// This used to implement the .align assembler directive. 467 /// 468 /// @param ByteAlignment - The alignment to reach. This must be a power of 469 /// two on some targets. 470 /// @param Value - The value to use when filling bytes. 471 /// @param ValueSize - The size of the integer (in bytes) to emit for 472 /// @p Value. This must match a native machine width. 473 /// @param MaxBytesToEmit - The maximum numbers of bytes to emit, or 0. If 474 /// the alignment cannot be reached in this many bytes, no bytes are 475 /// emitted. 476 virtual void EmitValueToAlignment(unsigned ByteAlignment, int64_t Value = 0, 477 unsigned ValueSize = 1, 478 unsigned MaxBytesToEmit = 0) = 0; 479 480 /// EmitCodeAlignment - Emit nops until the byte alignment @p ByteAlignment 481 /// is reached. 482 /// 483 /// This used to align code where the alignment bytes may be executed. This 484 /// can emit different bytes for different sizes to optimize execution. 485 /// 486 /// @param ByteAlignment - The alignment to reach. This must be a power of 487 /// two on some targets. 488 /// @param MaxBytesToEmit - The maximum numbers of bytes to emit, or 0. If 489 /// the alignment cannot be reached in this many bytes, no bytes are 490 /// emitted. 491 virtual void EmitCodeAlignment(unsigned ByteAlignment, 492 unsigned MaxBytesToEmit = 0) = 0; 493 494 /// EmitValueToOffset - Emit some number of copies of @p Value until the 495 /// byte offset @p Offset is reached. 496 /// 497 /// This is used to implement assembler directives such as .org. 498 /// 499 /// @param Offset - The offset to reach. This may be an expression, but the 500 /// expression must be associated with the current section. 501 /// @param Value - The value to use when filling bytes. 502 virtual void EmitValueToOffset(const MCExpr *Offset, 503 unsigned char Value = 0) = 0; 504 505 /// @} 506 507 /// EmitFileDirective - Switch to a new logical file. This is used to 508 /// implement the '.file "foo.c"' assembler directive. 509 virtual void EmitFileDirective(StringRef Filename) = 0; 510 511 /// EmitDwarfFileDirective - Associate a filename with a specified logical 512 /// file number. This implements the DWARF2 '.file 4 "foo.c"' assembler 513 /// directive. 514 virtual bool EmitDwarfFileDirective(unsigned FileNo, StringRef Directory, 515 StringRef Filename); 516 517 /// EmitDwarfLocDirective - This implements the DWARF2 518 // '.loc fileno lineno ...' assembler directive. 519 virtual void EmitDwarfLocDirective(unsigned FileNo, unsigned Line, 520 unsigned Column, unsigned Flags, 521 unsigned Isa, 522 unsigned Discriminator, 523 StringRef FileName); 524 525 virtual void EmitDwarfAdvanceLineAddr(int64_t LineDelta, 526 const MCSymbol *LastLabel, 527 const MCSymbol *Label, 528 unsigned PointerSize) = 0; 529 530 virtual void EmitDwarfAdvanceFrameAddr(const MCSymbol *LastLabel, 531 const MCSymbol *Label) { 532 } 533 534 void EmitDwarfSetLineAddr(int64_t LineDelta, const MCSymbol *Label, 535 int PointerSize); 536 537 virtual void EmitCompactUnwindEncoding(uint32_t CompactUnwindEncoding); 538 virtual void EmitCFISections(bool EH, bool Debug); 539 virtual void EmitCFIStartProc(); 540 virtual void EmitCFIEndProc(); 541 virtual void EmitCFIDefCfa(int64_t Register, int64_t Offset); 542 virtual void EmitCFIDefCfaOffset(int64_t Offset); 543 virtual void EmitCFIDefCfaRegister(int64_t Register); 544 virtual void EmitCFIOffset(int64_t Register, int64_t Offset); 545 virtual void EmitCFIPersonality(const MCSymbol *Sym, unsigned Encoding); 546 virtual void EmitCFILsda(const MCSymbol *Sym, unsigned Encoding); 547 virtual void EmitCFIRememberState(); 548 virtual void EmitCFIRestoreState(); 549 virtual void EmitCFISameValue(int64_t Register); 550 virtual void EmitCFIRelOffset(int64_t Register, int64_t Offset); 551 virtual void EmitCFIAdjustCfaOffset(int64_t Adjustment); 552 virtual void EmitCFIEscape(StringRef Values); 553 554 virtual void EmitWin64EHStartProc(const MCSymbol *Symbol); 555 virtual void EmitWin64EHEndProc(); 556 virtual void EmitWin64EHStartChained(); 557 virtual void EmitWin64EHEndChained(); 558 virtual void EmitWin64EHHandler(const MCSymbol *Sym, bool Unwind, 559 bool Except); 560 virtual void EmitWin64EHHandlerData(); 561 virtual void EmitWin64EHPushReg(unsigned Register); 562 virtual void EmitWin64EHSetFrame(unsigned Register, unsigned Offset); 563 virtual void EmitWin64EHAllocStack(unsigned Size); 564 virtual void EmitWin64EHSaveReg(unsigned Register, unsigned Offset); 565 virtual void EmitWin64EHSaveXMM(unsigned Register, unsigned Offset); 566 virtual void EmitWin64EHPushFrame(bool Code); 567 virtual void EmitWin64EHEndProlog(); 568 569 /// EmitInstruction - Emit the given @p Instruction into the current 570 /// section. 571 virtual void EmitInstruction(const MCInst &Inst) = 0; 572 573 /// EmitRawText - If this file is backed by a assembly streamer, this dumps 574 /// the specified string in the output .s file. This capability is 575 /// indicated by the hasRawTextSupport() predicate. By default this aborts. 576 virtual void EmitRawText(StringRef String); 577 void EmitRawText(const Twine &String); 578 579 /// ARM-related methods. 580 /// FIXME: Eventually we should have some "target MC streamer" and move 581 /// these methods there. 582 virtual void EmitFnStart(); 583 virtual void EmitFnEnd(); 584 virtual void EmitCantUnwind(); 585 virtual void EmitPersonality(const MCSymbol *Personality); 586 virtual void EmitHandlerData(); 587 virtual void EmitSetFP(unsigned FpReg, unsigned SpReg, int64_t Offset = 0); 588 virtual void EmitPad(int64_t Offset); 589 virtual void EmitRegSave(const SmallVectorImpl<unsigned> &RegList, 590 bool isVector); 591 592 /// Finish - Finish emission of machine code. 593 virtual void Finish() = 0; 594 }; 595 596 /// createNullStreamer - Create a dummy machine code streamer, which does 597 /// nothing. This is useful for timing the assembler front end. 598 MCStreamer *createNullStreamer(MCContext &Ctx); 599 600 /// createAsmStreamer - Create a machine code streamer which will print out 601 /// assembly for the native target, suitable for compiling with a native 602 /// assembler. 603 /// 604 /// \param InstPrint - If given, the instruction printer to use. If not given 605 /// the MCInst representation will be printed. This method takes ownership of 606 /// InstPrint. 607 /// 608 /// \param CE - If given, a code emitter to use to show the instruction 609 /// encoding inline with the assembly. This method takes ownership of \arg CE. 610 /// 611 /// \param TAB - If given, a target asm backend to use to show the fixup 612 /// information in conjunction with encoding information. This method takes 613 /// ownership of \arg TAB. 614 /// 615 /// \param ShowInst - Whether to show the MCInst representation inline with 616 /// the assembly. 617 /// 618 /// \param DecodeLSDA - If true, emit comments that translates the LSDA into a 619 /// human readable format. Only usable with CFI. 620 MCStreamer *createAsmStreamer(MCContext &Ctx, formatted_raw_ostream &OS, 621 bool isVerboseAsm, 622 bool useLoc, 623 bool useCFI, 624 bool useDwarfDirectory, 625 MCInstPrinter *InstPrint = 0, 626 MCCodeEmitter *CE = 0, 627 MCAsmBackend *TAB = 0, 628 bool ShowInst = false); 629 630 /// createMachOStreamer - Create a machine code streamer which will generate 631 /// Mach-O format object files. 632 /// 633 /// Takes ownership of \arg TAB and \arg CE. 634 MCStreamer *createMachOStreamer(MCContext &Ctx, MCAsmBackend &TAB, 635 raw_ostream &OS, MCCodeEmitter *CE, 636 bool RelaxAll = false); 637 638 /// createWinCOFFStreamer - Create a machine code streamer which will 639 /// generate Microsoft COFF format object files. 640 /// 641 /// Takes ownership of \arg TAB and \arg CE. 642 MCStreamer *createWinCOFFStreamer(MCContext &Ctx, 643 MCAsmBackend &TAB, 644 MCCodeEmitter &CE, raw_ostream &OS, 645 bool RelaxAll = false); 646 647 /// createELFStreamer - Create a machine code streamer which will generate 648 /// ELF format object files. 649 MCStreamer *createELFStreamer(MCContext &Ctx, MCAsmBackend &TAB, 650 raw_ostream &OS, MCCodeEmitter *CE, 651 bool RelaxAll, bool NoExecStack); 652 653 /// createLoggingStreamer - Create a machine code streamer which just logs the 654 /// API calls and then dispatches to another streamer. 655 /// 656 /// The new streamer takes ownership of the \arg Child. 657 MCStreamer *createLoggingStreamer(MCStreamer *Child, raw_ostream &OS); 658 659 /// createPureStreamer - Create a machine code streamer which will generate 660 /// "pure" MC object files, for use with MC-JIT and testing tools. 661 /// 662 /// Takes ownership of \arg TAB and \arg CE. 663 MCStreamer *createPureStreamer(MCContext &Ctx, MCAsmBackend &TAB, 664 raw_ostream &OS, MCCodeEmitter *CE); 665 666} // end namespace llvm 667 668#endif 669