LLVM 19.0.0git
AsmParser.cpp
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1//===- AsmParser.cpp - Parser for Assembly Files --------------------------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8//
9// This class implements a parser for assembly files similar to gas syntax.
10//
11//===----------------------------------------------------------------------===//
12
13#include "llvm/ADT/APFloat.h"
14#include "llvm/ADT/APInt.h"
15#include "llvm/ADT/ArrayRef.h"
16#include "llvm/ADT/STLExtras.h"
17#include "llvm/ADT/SmallSet.h"
21#include "llvm/ADT/StringMap.h"
22#include "llvm/ADT/StringRef.h"
23#include "llvm/ADT/Twine.h"
26#include "llvm/MC/MCAsmInfo.h"
27#include "llvm/MC/MCCodeView.h"
28#include "llvm/MC/MCContext.h"
30#include "llvm/MC/MCDwarf.h"
31#include "llvm/MC/MCExpr.h"
33#include "llvm/MC/MCInstrDesc.h"
34#include "llvm/MC/MCInstrInfo.h"
44#include "llvm/MC/MCSection.h"
45#include "llvm/MC/MCStreamer.h"
46#include "llvm/MC/MCSymbol.h"
48#include "llvm/MC/MCValue.h"
52#include "llvm/Support/MD5.h"
55#include "llvm/Support/SMLoc.h"
58#include <algorithm>
59#include <cassert>
60#include <cctype>
61#include <climits>
62#include <cstddef>
63#include <cstdint>
64#include <deque>
65#include <memory>
66#include <optional>
67#include <sstream>
68#include <string>
69#include <tuple>
70#include <utility>
71#include <vector>
72
73using namespace llvm;
74
76
77namespace {
78
79/// Helper types for tracking macro definitions.
80typedef std::vector<AsmToken> MCAsmMacroArgument;
81typedef std::vector<MCAsmMacroArgument> MCAsmMacroArguments;
82
83/// Helper class for storing information about an active macro
84/// instantiation.
85struct MacroInstantiation {
86 /// The location of the instantiation.
87 SMLoc InstantiationLoc;
88
89 /// The buffer where parsing should resume upon instantiation completion.
90 unsigned ExitBuffer;
91
92 /// The location where parsing should resume upon instantiation completion.
93 SMLoc ExitLoc;
94
95 /// The depth of TheCondStack at the start of the instantiation.
96 size_t CondStackDepth;
97};
98
99struct ParseStatementInfo {
100 /// The parsed operands from the last parsed statement.
102
103 /// The opcode from the last parsed instruction.
104 unsigned Opcode = ~0U;
105
106 /// Was there an error parsing the inline assembly?
107 bool ParseError = false;
108
109 SmallVectorImpl<AsmRewrite> *AsmRewrites = nullptr;
110
111 ParseStatementInfo() = delete;
112 ParseStatementInfo(SmallVectorImpl<AsmRewrite> *rewrites)
113 : AsmRewrites(rewrites) {}
114};
115
116/// The concrete assembly parser instance.
117class AsmParser : public MCAsmParser {
118private:
119 AsmLexer Lexer;
120 MCContext &Ctx;
121 MCStreamer &Out;
122 const MCAsmInfo &MAI;
124 SourceMgr::DiagHandlerTy SavedDiagHandler;
125 void *SavedDiagContext;
126 std::unique_ptr<MCAsmParserExtension> PlatformParser;
127 SMLoc StartTokLoc;
128 std::optional<SMLoc> CFIStartProcLoc;
129
130 /// This is the current buffer index we're lexing from as managed by the
131 /// SourceMgr object.
132 unsigned CurBuffer;
133
134 AsmCond TheCondState;
135 std::vector<AsmCond> TheCondStack;
136
137 /// maps directive names to handler methods in parser
138 /// extensions. Extensions register themselves in this map by calling
139 /// addDirectiveHandler.
140 StringMap<ExtensionDirectiveHandler> ExtensionDirectiveMap;
141
142 /// Stack of active macro instantiations.
143 std::vector<MacroInstantiation*> ActiveMacros;
144
145 /// List of bodies of anonymous macros.
146 std::deque<MCAsmMacro> MacroLikeBodies;
147
148 /// Boolean tracking whether macro substitution is enabled.
149 unsigned MacrosEnabledFlag : 1;
150
151 /// Keeps track of how many .macro's have been instantiated.
152 unsigned NumOfMacroInstantiations;
153
154 /// The values from the last parsed cpp hash file line comment if any.
155 struct CppHashInfoTy {
157 int64_t LineNumber;
158 SMLoc Loc;
159 unsigned Buf;
160 CppHashInfoTy() : LineNumber(0), Buf(0) {}
161 };
162 CppHashInfoTy CppHashInfo;
163
164 /// The filename from the first cpp hash file line comment, if any.
165 StringRef FirstCppHashFilename;
166
167 /// List of forward directional labels for diagnosis at the end.
169
170 SmallSet<StringRef, 2> LTODiscardSymbols;
171
172 /// AssemblerDialect. ~OU means unset value and use value provided by MAI.
173 unsigned AssemblerDialect = ~0U;
174
175 /// is Darwin compatibility enabled?
176 bool IsDarwin = false;
177
178 /// Are we parsing ms-style inline assembly?
179 bool ParsingMSInlineAsm = false;
180
181 /// Did we already inform the user about inconsistent MD5 usage?
182 bool ReportedInconsistentMD5 = false;
183
184 // Is alt macro mode enabled.
185 bool AltMacroMode = false;
186
187protected:
188 virtual bool parseStatement(ParseStatementInfo &Info,
190
191 /// This routine uses the target specific ParseInstruction function to
192 /// parse an instruction into Operands, and then call the target specific
193 /// MatchAndEmit function to match and emit the instruction.
194 bool parseAndMatchAndEmitTargetInstruction(ParseStatementInfo &Info,
195 StringRef IDVal, AsmToken ID,
196 SMLoc IDLoc);
197
198 /// Should we emit DWARF describing this assembler source? (Returns false if
199 /// the source has .file directives, which means we don't want to generate
200 /// info describing the assembler source itself.)
201 bool enabledGenDwarfForAssembly();
202
203public:
204 AsmParser(SourceMgr &SM, MCContext &Ctx, MCStreamer &Out,
205 const MCAsmInfo &MAI, unsigned CB);
206 AsmParser(const AsmParser &) = delete;
207 AsmParser &operator=(const AsmParser &) = delete;
208 ~AsmParser() override;
209
210 bool Run(bool NoInitialTextSection, bool NoFinalize = false) override;
211
213 ExtensionDirectiveHandler Handler) override {
214 ExtensionDirectiveMap[Directive] = Handler;
215 }
216
217 void addAliasForDirective(StringRef Directive, StringRef Alias) override {
218 DirectiveKindMap[Directive.lower()] = DirectiveKindMap[Alias.lower()];
219 }
220
221 /// @name MCAsmParser Interface
222 /// {
223
224 SourceMgr &getSourceManager() override { return SrcMgr; }
225 MCAsmLexer &getLexer() override { return Lexer; }
226 MCContext &getContext() override { return Ctx; }
227 MCStreamer &getStreamer() override { return Out; }
228
229 CodeViewContext &getCVContext() { return Ctx.getCVContext(); }
230
231 unsigned getAssemblerDialect() override {
232 if (AssemblerDialect == ~0U)
233 return MAI.getAssemblerDialect();
234 else
235 return AssemblerDialect;
236 }
237 void setAssemblerDialect(unsigned i) override {
238 AssemblerDialect = i;
239 }
240
241 void Note(SMLoc L, const Twine &Msg, SMRange Range = std::nullopt) override;
242 bool Warning(SMLoc L, const Twine &Msg,
243 SMRange Range = std::nullopt) override;
244 bool printError(SMLoc L, const Twine &Msg,
245 SMRange Range = std::nullopt) override;
246
247 const AsmToken &Lex() override;
248
249 void setParsingMSInlineAsm(bool V) override {
250 ParsingMSInlineAsm = V;
251 // When parsing MS inline asm, we must lex 0b1101 and 0ABCH as binary and
252 // hex integer literals.
253 Lexer.setLexMasmIntegers(V);
254 }
255 bool isParsingMSInlineAsm() override { return ParsingMSInlineAsm; }
256
257 bool discardLTOSymbol(StringRef Name) const override {
258 return LTODiscardSymbols.contains(Name);
259 }
260
261 bool parseMSInlineAsm(std::string &AsmString, unsigned &NumOutputs,
262 unsigned &NumInputs,
263 SmallVectorImpl<std::pair<void *, bool>> &OpDecls,
264 SmallVectorImpl<std::string> &Constraints,
266 const MCInstrInfo *MII, const MCInstPrinter *IP,
267 MCAsmParserSemaCallback &SI) override;
268
269 bool parseExpression(const MCExpr *&Res);
270 bool parseExpression(const MCExpr *&Res, SMLoc &EndLoc) override;
271 bool parsePrimaryExpr(const MCExpr *&Res, SMLoc &EndLoc,
272 AsmTypeInfo *TypeInfo) override;
273 bool parseParenExpression(const MCExpr *&Res, SMLoc &EndLoc) override;
274 bool parseParenExprOfDepth(unsigned ParenDepth, const MCExpr *&Res,
275 SMLoc &EndLoc) override;
276 bool parseAbsoluteExpression(int64_t &Res) override;
277
278 /// Parse a floating point expression using the float \p Semantics
279 /// and set \p Res to the value.
280 bool parseRealValue(const fltSemantics &Semantics, APInt &Res);
281
282 /// Parse an identifier or string (as a quoted identifier)
283 /// and set \p Res to the identifier contents.
284 bool parseIdentifier(StringRef &Res) override;
285 void eatToEndOfStatement() override;
286
287 bool checkForValidSection() override;
288
289 /// }
290
291private:
292 bool parseCurlyBlockScope(SmallVectorImpl<AsmRewrite>& AsmStrRewrites);
293 bool parseCppHashLineFilenameComment(SMLoc L, bool SaveLocInfo = true);
294
295 void checkForBadMacro(SMLoc DirectiveLoc, StringRef Name, StringRef Body,
297 bool expandMacro(raw_svector_ostream &OS, StringRef Body,
299 ArrayRef<MCAsmMacroArgument> A, bool EnableAtPseudoVariable,
300 SMLoc L);
301
302 /// Are macros enabled in the parser?
303 bool areMacrosEnabled() {return MacrosEnabledFlag;}
304
305 /// Control a flag in the parser that enables or disables macros.
306 void setMacrosEnabled(bool Flag) {MacrosEnabledFlag = Flag;}
307
308 /// Are we inside a macro instantiation?
309 bool isInsideMacroInstantiation() {return !ActiveMacros.empty();}
310
311 /// Handle entry to macro instantiation.
312 ///
313 /// \param M The macro.
314 /// \param NameLoc Instantiation location.
315 bool handleMacroEntry(const MCAsmMacro *M, SMLoc NameLoc);
316
317 /// Handle exit from macro instantiation.
318 void handleMacroExit();
319
320 /// Extract AsmTokens for a macro argument.
321 bool parseMacroArgument(MCAsmMacroArgument &MA, bool Vararg);
322
323 /// Parse all macro arguments for a given macro.
324 bool parseMacroArguments(const MCAsmMacro *M, MCAsmMacroArguments &A);
325
326 void printMacroInstantiations();
327 void printMessage(SMLoc Loc, SourceMgr::DiagKind Kind, const Twine &Msg,
328 SMRange Range = std::nullopt) const {
330 SrcMgr.PrintMessage(Loc, Kind, Msg, Ranges);
331 }
332 static void DiagHandler(const SMDiagnostic &Diag, void *Context);
333
334 /// Enter the specified file. This returns true on failure.
335 bool enterIncludeFile(const std::string &Filename);
336
337 /// Process the specified file for the .incbin directive.
338 /// This returns true on failure.
339 bool processIncbinFile(const std::string &Filename, int64_t Skip = 0,
340 const MCExpr *Count = nullptr, SMLoc Loc = SMLoc());
341
342 /// Reset the current lexer position to that given by \p Loc. The
343 /// current token is not set; clients should ensure Lex() is called
344 /// subsequently.
345 ///
346 /// \param InBuffer If not 0, should be the known buffer id that contains the
347 /// location.
348 void jumpToLoc(SMLoc Loc, unsigned InBuffer = 0);
349
350 /// Parse up to the end of statement and a return the contents from the
351 /// current token until the end of the statement; the current token on exit
352 /// will be either the EndOfStatement or EOF.
354
355 /// Parse until the end of a statement or a comma is encountered,
356 /// return the contents from the current token up to the end or comma.
357 StringRef parseStringToComma();
358
359 enum class AssignmentKind {
360 Set,
361 Equiv,
362 Equal,
363 LTOSetConditional,
364 };
365
366 bool parseAssignment(StringRef Name, AssignmentKind Kind);
367
368 unsigned getBinOpPrecedence(AsmToken::TokenKind K,
370
371 bool parseBinOpRHS(unsigned Precedence, const MCExpr *&Res, SMLoc &EndLoc);
372 bool parseParenExpr(const MCExpr *&Res, SMLoc &EndLoc);
373 bool parseBracketExpr(const MCExpr *&Res, SMLoc &EndLoc);
374
375 bool parseRegisterOrRegisterNumber(int64_t &Register, SMLoc DirectiveLoc);
376
377 bool parseCVFunctionId(int64_t &FunctionId, StringRef DirectiveName);
378 bool parseCVFileId(int64_t &FileId, StringRef DirectiveName);
379
380 // Generic (target and platform independent) directive parsing.
381 enum DirectiveKind {
382 DK_NO_DIRECTIVE, // Placeholder
383 DK_SET,
384 DK_EQU,
385 DK_EQUIV,
386 DK_ASCII,
387 DK_ASCIZ,
388 DK_STRING,
389 DK_BYTE,
390 DK_SHORT,
391 DK_RELOC,
392 DK_VALUE,
393 DK_2BYTE,
394 DK_LONG,
395 DK_INT,
396 DK_4BYTE,
397 DK_QUAD,
398 DK_8BYTE,
399 DK_OCTA,
400 DK_DC,
401 DK_DC_A,
402 DK_DC_B,
403 DK_DC_D,
404 DK_DC_L,
405 DK_DC_S,
406 DK_DC_W,
407 DK_DC_X,
408 DK_DCB,
409 DK_DCB_B,
410 DK_DCB_D,
411 DK_DCB_L,
412 DK_DCB_S,
413 DK_DCB_W,
414 DK_DCB_X,
415 DK_DS,
416 DK_DS_B,
417 DK_DS_D,
418 DK_DS_L,
419 DK_DS_P,
420 DK_DS_S,
421 DK_DS_W,
422 DK_DS_X,
423 DK_SINGLE,
424 DK_FLOAT,
425 DK_DOUBLE,
426 DK_ALIGN,
427 DK_ALIGN32,
428 DK_BALIGN,
429 DK_BALIGNW,
430 DK_BALIGNL,
431 DK_P2ALIGN,
432 DK_P2ALIGNW,
433 DK_P2ALIGNL,
434 DK_ORG,
435 DK_FILL,
436 DK_ENDR,
437 DK_BUNDLE_ALIGN_MODE,
438 DK_BUNDLE_LOCK,
439 DK_BUNDLE_UNLOCK,
440 DK_ZERO,
441 DK_EXTERN,
442 DK_GLOBL,
443 DK_GLOBAL,
444 DK_LAZY_REFERENCE,
445 DK_NO_DEAD_STRIP,
446 DK_SYMBOL_RESOLVER,
447 DK_PRIVATE_EXTERN,
448 DK_REFERENCE,
449 DK_WEAK_DEFINITION,
450 DK_WEAK_REFERENCE,
451 DK_WEAK_DEF_CAN_BE_HIDDEN,
452 DK_COLD,
453 DK_COMM,
454 DK_COMMON,
455 DK_LCOMM,
456 DK_ABORT,
457 DK_INCLUDE,
458 DK_INCBIN,
459 DK_CODE16,
460 DK_CODE16GCC,
461 DK_REPT,
462 DK_IRP,
463 DK_IRPC,
464 DK_IF,
465 DK_IFEQ,
466 DK_IFGE,
467 DK_IFGT,
468 DK_IFLE,
469 DK_IFLT,
470 DK_IFNE,
471 DK_IFB,
472 DK_IFNB,
473 DK_IFC,
474 DK_IFEQS,
475 DK_IFNC,
476 DK_IFNES,
477 DK_IFDEF,
478 DK_IFNDEF,
479 DK_IFNOTDEF,
480 DK_ELSEIF,
481 DK_ELSE,
482 DK_ENDIF,
483 DK_SPACE,
484 DK_SKIP,
485 DK_FILE,
486 DK_LINE,
487 DK_LOC,
488 DK_STABS,
489 DK_CV_FILE,
490 DK_CV_FUNC_ID,
491 DK_CV_INLINE_SITE_ID,
492 DK_CV_LOC,
493 DK_CV_LINETABLE,
494 DK_CV_INLINE_LINETABLE,
495 DK_CV_DEF_RANGE,
496 DK_CV_STRINGTABLE,
497 DK_CV_STRING,
498 DK_CV_FILECHECKSUMS,
499 DK_CV_FILECHECKSUM_OFFSET,
500 DK_CV_FPO_DATA,
501 DK_CFI_SECTIONS,
502 DK_CFI_STARTPROC,
503 DK_CFI_ENDPROC,
504 DK_CFI_DEF_CFA,
505 DK_CFI_DEF_CFA_OFFSET,
506 DK_CFI_ADJUST_CFA_OFFSET,
507 DK_CFI_DEF_CFA_REGISTER,
508 DK_CFI_LLVM_DEF_ASPACE_CFA,
509 DK_CFI_OFFSET,
510 DK_CFI_REL_OFFSET,
511 DK_CFI_PERSONALITY,
512 DK_CFI_LSDA,
513 DK_CFI_REMEMBER_STATE,
514 DK_CFI_RESTORE_STATE,
515 DK_CFI_SAME_VALUE,
516 DK_CFI_RESTORE,
517 DK_CFI_ESCAPE,
518 DK_CFI_RETURN_COLUMN,
519 DK_CFI_SIGNAL_FRAME,
520 DK_CFI_UNDEFINED,
521 DK_CFI_REGISTER,
522 DK_CFI_WINDOW_SAVE,
523 DK_CFI_B_KEY_FRAME,
524 DK_MACROS_ON,
525 DK_MACROS_OFF,
526 DK_ALTMACRO,
527 DK_NOALTMACRO,
528 DK_MACRO,
529 DK_EXITM,
530 DK_ENDM,
531 DK_ENDMACRO,
532 DK_PURGEM,
533 DK_SLEB128,
534 DK_ULEB128,
535 DK_ERR,
536 DK_ERROR,
537 DK_WARNING,
538 DK_PRINT,
539 DK_ADDRSIG,
540 DK_ADDRSIG_SYM,
541 DK_PSEUDO_PROBE,
542 DK_LTO_DISCARD,
543 DK_LTO_SET_CONDITIONAL,
544 DK_CFI_MTE_TAGGED_FRAME,
545 DK_MEMTAG,
546 DK_END
547 };
548
549 /// Maps directive name --> DirectiveKind enum, for
550 /// directives parsed by this class.
551 StringMap<DirectiveKind> DirectiveKindMap;
552
553 // Codeview def_range type parsing.
554 enum CVDefRangeType {
555 CVDR_DEFRANGE = 0, // Placeholder
556 CVDR_DEFRANGE_REGISTER,
557 CVDR_DEFRANGE_FRAMEPOINTER_REL,
558 CVDR_DEFRANGE_SUBFIELD_REGISTER,
559 CVDR_DEFRANGE_REGISTER_REL
560 };
561
562 /// Maps Codeview def_range types --> CVDefRangeType enum, for
563 /// Codeview def_range types parsed by this class.
564 StringMap<CVDefRangeType> CVDefRangeTypeMap;
565
566 // ".ascii", ".asciz", ".string"
567 bool parseDirectiveAscii(StringRef IDVal, bool ZeroTerminated);
568 bool parseDirectiveReloc(SMLoc DirectiveLoc); // ".reloc"
569 bool parseDirectiveValue(StringRef IDVal,
570 unsigned Size); // ".byte", ".long", ...
571 bool parseDirectiveOctaValue(StringRef IDVal); // ".octa", ...
572 bool parseDirectiveRealValue(StringRef IDVal,
573 const fltSemantics &); // ".single", ...
574 bool parseDirectiveFill(); // ".fill"
575 bool parseDirectiveZero(); // ".zero"
576 // ".set", ".equ", ".equiv", ".lto_set_conditional"
577 bool parseDirectiveSet(StringRef IDVal, AssignmentKind Kind);
578 bool parseDirectiveOrg(); // ".org"
579 // ".align{,32}", ".p2align{,w,l}"
580 bool parseDirectiveAlign(bool IsPow2, unsigned ValueSize);
581
582 // ".file", ".line", ".loc", ".stabs"
583 bool parseDirectiveFile(SMLoc DirectiveLoc);
584 bool parseDirectiveLine();
585 bool parseDirectiveLoc();
586 bool parseDirectiveStabs();
587
588 // ".cv_file", ".cv_func_id", ".cv_inline_site_id", ".cv_loc", ".cv_linetable",
589 // ".cv_inline_linetable", ".cv_def_range", ".cv_string"
590 bool parseDirectiveCVFile();
591 bool parseDirectiveCVFuncId();
592 bool parseDirectiveCVInlineSiteId();
593 bool parseDirectiveCVLoc();
594 bool parseDirectiveCVLinetable();
595 bool parseDirectiveCVInlineLinetable();
596 bool parseDirectiveCVDefRange();
597 bool parseDirectiveCVString();
598 bool parseDirectiveCVStringTable();
599 bool parseDirectiveCVFileChecksums();
600 bool parseDirectiveCVFileChecksumOffset();
601 bool parseDirectiveCVFPOData();
602
603 // .cfi directives
604 bool parseDirectiveCFIRegister(SMLoc DirectiveLoc);
605 bool parseDirectiveCFIWindowSave(SMLoc DirectiveLoc);
606 bool parseDirectiveCFISections();
607 bool parseDirectiveCFIStartProc();
608 bool parseDirectiveCFIEndProc();
609 bool parseDirectiveCFIDefCfaOffset(SMLoc DirectiveLoc);
610 bool parseDirectiveCFIDefCfa(SMLoc DirectiveLoc);
611 bool parseDirectiveCFIAdjustCfaOffset(SMLoc DirectiveLoc);
612 bool parseDirectiveCFIDefCfaRegister(SMLoc DirectiveLoc);
613 bool parseDirectiveCFILLVMDefAspaceCfa(SMLoc DirectiveLoc);
614 bool parseDirectiveCFIOffset(SMLoc DirectiveLoc);
615 bool parseDirectiveCFIRelOffset(SMLoc DirectiveLoc);
616 bool parseDirectiveCFIPersonalityOrLsda(bool IsPersonality);
617 bool parseDirectiveCFIRememberState(SMLoc DirectiveLoc);
618 bool parseDirectiveCFIRestoreState(SMLoc DirectiveLoc);
619 bool parseDirectiveCFISameValue(SMLoc DirectiveLoc);
620 bool parseDirectiveCFIRestore(SMLoc DirectiveLoc);
621 bool parseDirectiveCFIEscape(SMLoc DirectiveLoc);
622 bool parseDirectiveCFIReturnColumn(SMLoc DirectiveLoc);
623 bool parseDirectiveCFISignalFrame(SMLoc DirectiveLoc);
624 bool parseDirectiveCFIUndefined(SMLoc DirectiveLoc);
625
626 // macro directives
627 bool parseDirectivePurgeMacro(SMLoc DirectiveLoc);
628 bool parseDirectiveExitMacro(StringRef Directive);
629 bool parseDirectiveEndMacro(StringRef Directive);
630 bool parseDirectiveMacro(SMLoc DirectiveLoc);
631 bool parseDirectiveMacrosOnOff(StringRef Directive);
632 // alternate macro mode directives
633 bool parseDirectiveAltmacro(StringRef Directive);
634 // ".bundle_align_mode"
635 bool parseDirectiveBundleAlignMode();
636 // ".bundle_lock"
637 bool parseDirectiveBundleLock();
638 // ".bundle_unlock"
639 bool parseDirectiveBundleUnlock();
640
641 // ".space", ".skip"
642 bool parseDirectiveSpace(StringRef IDVal);
643
644 // ".dcb"
645 bool parseDirectiveDCB(StringRef IDVal, unsigned Size);
646 bool parseDirectiveRealDCB(StringRef IDVal, const fltSemantics &);
647 // ".ds"
648 bool parseDirectiveDS(StringRef IDVal, unsigned Size);
649
650 // .sleb128 (Signed=true) and .uleb128 (Signed=false)
651 bool parseDirectiveLEB128(bool Signed);
652
653 /// Parse a directive like ".globl" which
654 /// accepts a single symbol (which should be a label or an external).
655 bool parseDirectiveSymbolAttribute(MCSymbolAttr Attr);
656
657 bool parseDirectiveComm(bool IsLocal); // ".comm" and ".lcomm"
658
659 bool parseDirectiveAbort(); // ".abort"
660 bool parseDirectiveInclude(); // ".include"
661 bool parseDirectiveIncbin(); // ".incbin"
662
663 // ".if", ".ifeq", ".ifge", ".ifgt" , ".ifle", ".iflt" or ".ifne"
664 bool parseDirectiveIf(SMLoc DirectiveLoc, DirectiveKind DirKind);
665 // ".ifb" or ".ifnb", depending on ExpectBlank.
666 bool parseDirectiveIfb(SMLoc DirectiveLoc, bool ExpectBlank);
667 // ".ifc" or ".ifnc", depending on ExpectEqual.
668 bool parseDirectiveIfc(SMLoc DirectiveLoc, bool ExpectEqual);
669 // ".ifeqs" or ".ifnes", depending on ExpectEqual.
670 bool parseDirectiveIfeqs(SMLoc DirectiveLoc, bool ExpectEqual);
671 // ".ifdef" or ".ifndef", depending on expect_defined
672 bool parseDirectiveIfdef(SMLoc DirectiveLoc, bool expect_defined);
673 bool parseDirectiveElseIf(SMLoc DirectiveLoc); // ".elseif"
674 bool parseDirectiveElse(SMLoc DirectiveLoc); // ".else"
675 bool parseDirectiveEndIf(SMLoc DirectiveLoc); // .endif
676 bool parseEscapedString(std::string &Data) override;
677 bool parseAngleBracketString(std::string &Data) override;
678
679 const MCExpr *applyModifierToExpr(const MCExpr *E,
681
682 // Macro-like directives
683 MCAsmMacro *parseMacroLikeBody(SMLoc DirectiveLoc);
684 void instantiateMacroLikeBody(MCAsmMacro *M, SMLoc DirectiveLoc,
686 bool parseDirectiveRept(SMLoc DirectiveLoc, StringRef Directive);
687 bool parseDirectiveIrp(SMLoc DirectiveLoc); // ".irp"
688 bool parseDirectiveIrpc(SMLoc DirectiveLoc); // ".irpc"
689 bool parseDirectiveEndr(SMLoc DirectiveLoc); // ".endr"
690
691 // "_emit" or "__emit"
692 bool parseDirectiveMSEmit(SMLoc DirectiveLoc, ParseStatementInfo &Info,
693 size_t Len);
694
695 // "align"
696 bool parseDirectiveMSAlign(SMLoc DirectiveLoc, ParseStatementInfo &Info);
697
698 // "end"
699 bool parseDirectiveEnd(SMLoc DirectiveLoc);
700
701 // ".err" or ".error"
702 bool parseDirectiveError(SMLoc DirectiveLoc, bool WithMessage);
703
704 // ".warning"
705 bool parseDirectiveWarning(SMLoc DirectiveLoc);
706
707 // .print <double-quotes-string>
708 bool parseDirectivePrint(SMLoc DirectiveLoc);
709
710 // .pseudoprobe
711 bool parseDirectivePseudoProbe();
712
713 // ".lto_discard"
714 bool parseDirectiveLTODiscard();
715
716 // Directives to support address-significance tables.
717 bool parseDirectiveAddrsig();
718 bool parseDirectiveAddrsigSym();
719
720 void initializeDirectiveKindMap();
721 void initializeCVDefRangeTypeMap();
722};
723
724class HLASMAsmParser final : public AsmParser {
725private:
726 MCAsmLexer &Lexer;
727 MCStreamer &Out;
728
729 void lexLeadingSpaces() {
730 while (Lexer.is(AsmToken::Space))
731 Lexer.Lex();
732 }
733
734 bool parseAsHLASMLabel(ParseStatementInfo &Info, MCAsmParserSemaCallback *SI);
735 bool parseAsMachineInstruction(ParseStatementInfo &Info,
737
738public:
739 HLASMAsmParser(SourceMgr &SM, MCContext &Ctx, MCStreamer &Out,
740 const MCAsmInfo &MAI, unsigned CB = 0)
741 : AsmParser(SM, Ctx, Out, MAI, CB), Lexer(getLexer()), Out(Out) {
742 Lexer.setSkipSpace(false);
743 Lexer.setAllowHashInIdentifier(true);
744 Lexer.setLexHLASMIntegers(true);
745 Lexer.setLexHLASMStrings(true);
746 }
747
748 ~HLASMAsmParser() { Lexer.setSkipSpace(true); }
749
750 bool parseStatement(ParseStatementInfo &Info,
751 MCAsmParserSemaCallback *SI) override;
752};
753
754} // end anonymous namespace
755
756namespace llvm {
757
759
766
767} // end namespace llvm
768
769enum { DEFAULT_ADDRSPACE = 0 };
770
771AsmParser::AsmParser(SourceMgr &SM, MCContext &Ctx, MCStreamer &Out,
772 const MCAsmInfo &MAI, unsigned CB = 0)
773 : Lexer(MAI), Ctx(Ctx), Out(Out), MAI(MAI), SrcMgr(SM),
774 CurBuffer(CB ? CB : SM.getMainFileID()), MacrosEnabledFlag(true) {
775 HadError = false;
776 // Save the old handler.
777 SavedDiagHandler = SrcMgr.getDiagHandler();
778 SavedDiagContext = SrcMgr.getDiagContext();
779 // Set our own handler which calls the saved handler.
781 Lexer.setBuffer(SrcMgr.getMemoryBuffer(CurBuffer)->getBuffer());
782 // Make MCStreamer aware of the StartTokLoc for locations in diagnostics.
783 Out.setStartTokLocPtr(&StartTokLoc);
784
785 // Initialize the platform / file format parser.
786 switch (Ctx.getObjectFileType()) {
788 PlatformParser.reset(createCOFFAsmParser());
789 break;
791 PlatformParser.reset(createDarwinAsmParser());
792 IsDarwin = true;
793 break;
794 case MCContext::IsELF:
795 PlatformParser.reset(createELFAsmParser());
796 break;
798 PlatformParser.reset(createGOFFAsmParser());
799 break;
802 "Need to implement createSPIRVAsmParser for SPIRV format.");
803 break;
805 PlatformParser.reset(createWasmAsmParser());
806 break;
808 PlatformParser.reset(createXCOFFAsmParser());
809 break;
811 report_fatal_error("DXContainer is not supported yet");
812 break;
813 }
814
815 PlatformParser->Initialize(*this);
816 initializeDirectiveKindMap();
817 initializeCVDefRangeTypeMap();
818
819 NumOfMacroInstantiations = 0;
820}
821
822AsmParser::~AsmParser() {
823 assert((HadError || ActiveMacros.empty()) &&
824 "Unexpected active macro instantiation!");
825
826 // Remove MCStreamer's reference to the parser SMLoc.
827 Out.setStartTokLocPtr(nullptr);
828 // Restore the saved diagnostics handler and context for use during
829 // finalization.
830 SrcMgr.setDiagHandler(SavedDiagHandler, SavedDiagContext);
831}
832
833void AsmParser::printMacroInstantiations() {
834 // Print the active macro instantiation stack.
835 for (std::vector<MacroInstantiation *>::const_reverse_iterator
836 it = ActiveMacros.rbegin(),
837 ie = ActiveMacros.rend();
838 it != ie; ++it)
839 printMessage((*it)->InstantiationLoc, SourceMgr::DK_Note,
840 "while in macro instantiation");
841}
842
843void AsmParser::Note(SMLoc L, const Twine &Msg, SMRange Range) {
844 printPendingErrors();
845 printMessage(L, SourceMgr::DK_Note, Msg, Range);
846 printMacroInstantiations();
847}
848
849bool AsmParser::Warning(SMLoc L, const Twine &Msg, SMRange Range) {
850 if(getTargetParser().getTargetOptions().MCNoWarn)
851 return false;
852 if (getTargetParser().getTargetOptions().MCFatalWarnings)
853 return Error(L, Msg, Range);
854 printMessage(L, SourceMgr::DK_Warning, Msg, Range);
855 printMacroInstantiations();
856 return false;
857}
858
859bool AsmParser::printError(SMLoc L, const Twine &Msg, SMRange Range) {
860 HadError = true;
861 printMessage(L, SourceMgr::DK_Error, Msg, Range);
862 printMacroInstantiations();
863 return true;
864}
865
866bool AsmParser::enterIncludeFile(const std::string &Filename) {
867 std::string IncludedFile;
868 unsigned NewBuf =
869 SrcMgr.AddIncludeFile(Filename, Lexer.getLoc(), IncludedFile);
870 if (!NewBuf)
871 return true;
872
873 CurBuffer = NewBuf;
874 Lexer.setBuffer(SrcMgr.getMemoryBuffer(CurBuffer)->getBuffer());
875 return false;
876}
877
878/// Process the specified .incbin file by searching for it in the include paths
879/// then just emitting the byte contents of the file to the streamer. This
880/// returns true on failure.
881bool AsmParser::processIncbinFile(const std::string &Filename, int64_t Skip,
882 const MCExpr *Count, SMLoc Loc) {
883 std::string IncludedFile;
884 unsigned NewBuf =
885 SrcMgr.AddIncludeFile(Filename, Lexer.getLoc(), IncludedFile);
886 if (!NewBuf)
887 return true;
888
889 // Pick up the bytes from the file and emit them.
890 StringRef Bytes = SrcMgr.getMemoryBuffer(NewBuf)->getBuffer();
891 Bytes = Bytes.drop_front(Skip);
892 if (Count) {
893 int64_t Res;
894 if (!Count->evaluateAsAbsolute(Res, getStreamer().getAssemblerPtr()))
895 return Error(Loc, "expected absolute expression");
896 if (Res < 0)
897 return Warning(Loc, "negative count has no effect");
898 Bytes = Bytes.take_front(Res);
899 }
900 getStreamer().emitBytes(Bytes);
901 return false;
902}
903
904void AsmParser::jumpToLoc(SMLoc Loc, unsigned InBuffer) {
905 CurBuffer = InBuffer ? InBuffer : SrcMgr.FindBufferContainingLoc(Loc);
906 Lexer.setBuffer(SrcMgr.getMemoryBuffer(CurBuffer)->getBuffer(),
907 Loc.getPointer());
908}
909
910const AsmToken &AsmParser::Lex() {
911 if (Lexer.getTok().is(AsmToken::Error))
912 Error(Lexer.getErrLoc(), Lexer.getErr());
913
914 // if it's a end of statement with a comment in it
915 if (getTok().is(AsmToken::EndOfStatement)) {
916 // if this is a line comment output it.
917 if (!getTok().getString().empty() && getTok().getString().front() != '\n' &&
918 getTok().getString().front() != '\r' && MAI.preserveAsmComments())
919 Out.addExplicitComment(Twine(getTok().getString()));
920 }
921
922 const AsmToken *tok = &Lexer.Lex();
923
924 // Parse comments here to be deferred until end of next statement.
925 while (tok->is(AsmToken::Comment)) {
926 if (MAI.preserveAsmComments())
928 tok = &Lexer.Lex();
929 }
930
931 if (tok->is(AsmToken::Eof)) {
932 // If this is the end of an included file, pop the parent file off the
933 // include stack.
934 SMLoc ParentIncludeLoc = SrcMgr.getParentIncludeLoc(CurBuffer);
935 if (ParentIncludeLoc != SMLoc()) {
936 jumpToLoc(ParentIncludeLoc);
937 return Lex();
938 }
939 }
940
941 return *tok;
942}
943
944bool AsmParser::enabledGenDwarfForAssembly() {
945 // Check whether the user specified -g.
946 if (!getContext().getGenDwarfForAssembly())
947 return false;
948 // If we haven't encountered any .file directives (which would imply that
949 // the assembler source was produced with debug info already) then emit one
950 // describing the assembler source file itself.
951 if (getContext().getGenDwarfFileNumber() == 0) {
952 // Use the first #line directive for this, if any. It's preprocessed, so
953 // there is no checksum, and of course no source directive.
954 if (!FirstCppHashFilename.empty())
955 getContext().setMCLineTableRootFile(
956 /*CUID=*/0, getContext().getCompilationDir(), FirstCppHashFilename,
957 /*Cksum=*/std::nullopt, /*Source=*/std::nullopt);
958 const MCDwarfFile &RootFile =
959 getContext().getMCDwarfLineTable(/*CUID=*/0).getRootFile();
960 getContext().setGenDwarfFileNumber(getStreamer().emitDwarfFileDirective(
961 /*CUID=*/0, getContext().getCompilationDir(), RootFile.Name,
962 RootFile.Checksum, RootFile.Source));
963 }
964 return true;
965}
966
967bool AsmParser::Run(bool NoInitialTextSection, bool NoFinalize) {
968 LTODiscardSymbols.clear();
969
970 // Create the initial section, if requested.
971 if (!NoInitialTextSection)
972 Out.initSections(false, getTargetParser().getSTI());
973
974 // Prime the lexer.
975 Lex();
976
977 HadError = false;
978 AsmCond StartingCondState = TheCondState;
979 SmallVector<AsmRewrite, 4> AsmStrRewrites;
980
981 // If we are generating dwarf for assembly source files save the initial text
982 // section. (Don't use enabledGenDwarfForAssembly() here, as we aren't
983 // emitting any actual debug info yet and haven't had a chance to parse any
984 // embedded .file directives.)
985 if (getContext().getGenDwarfForAssembly()) {
986 MCSection *Sec = getStreamer().getCurrentSectionOnly();
987 if (!Sec->getBeginSymbol()) {
988 MCSymbol *SectionStartSym = getContext().createTempSymbol();
989 getStreamer().emitLabel(SectionStartSym);
990 Sec->setBeginSymbol(SectionStartSym);
991 }
992 bool InsertResult = getContext().addGenDwarfSection(Sec);
993 assert(InsertResult && ".text section should not have debug info yet");
994 (void)InsertResult;
995 }
996
997 getTargetParser().onBeginOfFile();
998
999 // While we have input, parse each statement.
1000 while (Lexer.isNot(AsmToken::Eof)) {
1001 ParseStatementInfo Info(&AsmStrRewrites);
1002 bool Parsed = parseStatement(Info, nullptr);
1003
1004 // If we have a Lexer Error we are on an Error Token. Load in Lexer Error
1005 // for printing ErrMsg via Lex() only if no (presumably better) parser error
1006 // exists.
1007 if (Parsed && !hasPendingError() && Lexer.getTok().is(AsmToken::Error)) {
1008 Lex();
1009 }
1010
1011 // parseStatement returned true so may need to emit an error.
1012 printPendingErrors();
1013
1014 // Skipping to the next line if needed.
1015 if (Parsed && !getLexer().isAtStartOfStatement())
1016 eatToEndOfStatement();
1017 }
1018
1019 getTargetParser().onEndOfFile();
1020 printPendingErrors();
1021
1022 // All errors should have been emitted.
1023 assert(!hasPendingError() && "unexpected error from parseStatement");
1024
1025 getTargetParser().flushPendingInstructions(getStreamer());
1026
1027 if (TheCondState.TheCond != StartingCondState.TheCond ||
1028 TheCondState.Ignore != StartingCondState.Ignore)
1029 printError(getTok().getLoc(), "unmatched .ifs or .elses");
1030 // Check to see there are no empty DwarfFile slots.
1031 const auto &LineTables = getContext().getMCDwarfLineTables();
1032 if (!LineTables.empty()) {
1033 unsigned Index = 0;
1034 for (const auto &File : LineTables.begin()->second.getMCDwarfFiles()) {
1035 if (File.Name.empty() && Index != 0)
1036 printError(getTok().getLoc(), "unassigned file number: " +
1037 Twine(Index) +
1038 " for .file directives");
1039 ++Index;
1040 }
1041 }
1042
1043 // Check to see that all assembler local symbols were actually defined.
1044 // Targets that don't do subsections via symbols may not want this, though,
1045 // so conservatively exclude them. Only do this if we're finalizing, though,
1046 // as otherwise we won't necessarilly have seen everything yet.
1047 if (!NoFinalize) {
1048 if (MAI.hasSubsectionsViaSymbols()) {
1049 for (const auto &TableEntry : getContext().getSymbols()) {
1050 MCSymbol *Sym = TableEntry.getValue();
1051 // Variable symbols may not be marked as defined, so check those
1052 // explicitly. If we know it's a variable, we have a definition for
1053 // the purposes of this check.
1054 if (Sym->isTemporary() && !Sym->isVariable() && !Sym->isDefined())
1055 // FIXME: We would really like to refer back to where the symbol was
1056 // first referenced for a source location. We need to add something
1057 // to track that. Currently, we just point to the end of the file.
1058 printError(getTok().getLoc(), "assembler local symbol '" +
1059 Sym->getName() + "' not defined");
1060 }
1061 }
1062
1063 // Temporary symbols like the ones for directional jumps don't go in the
1064 // symbol table. They also need to be diagnosed in all (final) cases.
1065 for (std::tuple<SMLoc, CppHashInfoTy, MCSymbol *> &LocSym : DirLabels) {
1066 if (std::get<2>(LocSym)->isUndefined()) {
1067 // Reset the state of any "# line file" directives we've seen to the
1068 // context as it was at the diagnostic site.
1069 CppHashInfo = std::get<1>(LocSym);
1070 printError(std::get<0>(LocSym), "directional label undefined");
1071 }
1072 }
1073 }
1074 // Finalize the output stream if there are no errors and if the client wants
1075 // us to.
1076 if (!HadError && !NoFinalize) {
1077 if (auto *TS = Out.getTargetStreamer())
1078 TS->emitConstantPools();
1079
1080 Out.finish(Lexer.getLoc());
1081 }
1082
1083 return HadError || getContext().hadError();
1084}
1085
1086bool AsmParser::checkForValidSection() {
1087 if (!ParsingMSInlineAsm && !getStreamer().getCurrentSectionOnly()) {
1088 Out.initSections(false, getTargetParser().getSTI());
1089 return Error(getTok().getLoc(),
1090 "expected section directive before assembly directive");
1091 }
1092 return false;
1093}
1094
1095/// Throw away the rest of the line for testing purposes.
1096void AsmParser::eatToEndOfStatement() {
1097 while (Lexer.isNot(AsmToken::EndOfStatement) && Lexer.isNot(AsmToken::Eof))
1098 Lexer.Lex();
1099
1100 // Eat EOL.
1101 if (Lexer.is(AsmToken::EndOfStatement))
1102 Lexer.Lex();
1103}
1104
1105StringRef AsmParser::parseStringToEndOfStatement() {
1106 const char *Start = getTok().getLoc().getPointer();
1107
1108 while (Lexer.isNot(AsmToken::EndOfStatement) && Lexer.isNot(AsmToken::Eof))
1109 Lexer.Lex();
1110
1111 const char *End = getTok().getLoc().getPointer();
1112 return StringRef(Start, End - Start);
1113}
1114
1115StringRef AsmParser::parseStringToComma() {
1116 const char *Start = getTok().getLoc().getPointer();
1117
1118 while (Lexer.isNot(AsmToken::EndOfStatement) &&
1119 Lexer.isNot(AsmToken::Comma) && Lexer.isNot(AsmToken::Eof))
1120 Lexer.Lex();
1121
1122 const char *End = getTok().getLoc().getPointer();
1123 return StringRef(Start, End - Start);
1124}
1125
1126/// Parse a paren expression and return it.
1127/// NOTE: This assumes the leading '(' has already been consumed.
1128///
1129/// parenexpr ::= expr)
1130///
1131bool AsmParser::parseParenExpr(const MCExpr *&Res, SMLoc &EndLoc) {
1132 if (parseExpression(Res))
1133 return true;
1134 EndLoc = Lexer.getTok().getEndLoc();
1135 return parseRParen();
1136}
1137
1138/// Parse a bracket expression and return it.
1139/// NOTE: This assumes the leading '[' has already been consumed.
1140///
1141/// bracketexpr ::= expr]
1142///
1143bool AsmParser::parseBracketExpr(const MCExpr *&Res, SMLoc &EndLoc) {
1144 if (parseExpression(Res))
1145 return true;
1146 EndLoc = getTok().getEndLoc();
1147 if (parseToken(AsmToken::RBrac, "expected ']' in brackets expression"))
1148 return true;
1149 return false;
1150}
1151
1152/// Parse a primary expression and return it.
1153/// primaryexpr ::= (parenexpr
1154/// primaryexpr ::= symbol
1155/// primaryexpr ::= number
1156/// primaryexpr ::= '.'
1157/// primaryexpr ::= ~,+,- primaryexpr
1158bool AsmParser::parsePrimaryExpr(const MCExpr *&Res, SMLoc &EndLoc,
1159 AsmTypeInfo *TypeInfo) {
1160 SMLoc FirstTokenLoc = getLexer().getLoc();
1161 AsmToken::TokenKind FirstTokenKind = Lexer.getKind();
1162 switch (FirstTokenKind) {
1163 default:
1164 return TokError("unknown token in expression");
1165 // If we have an error assume that we've already handled it.
1166 case AsmToken::Error:
1167 return true;
1168 case AsmToken::Exclaim:
1169 Lex(); // Eat the operator.
1170 if (parsePrimaryExpr(Res, EndLoc, TypeInfo))
1171 return true;
1172 Res = MCUnaryExpr::createLNot(Res, getContext(), FirstTokenLoc);
1173 return false;
1174 case AsmToken::Dollar:
1175 case AsmToken::Star:
1176 case AsmToken::At:
1177 case AsmToken::String:
1178 case AsmToken::Identifier: {
1180 if (parseIdentifier(Identifier)) {
1181 // We may have failed but '$'|'*' may be a valid token in context of
1182 // the current PC.
1183 if (getTok().is(AsmToken::Dollar) || getTok().is(AsmToken::Star)) {
1184 bool ShouldGenerateTempSymbol = false;
1185 if ((getTok().is(AsmToken::Dollar) && MAI.getDollarIsPC()) ||
1186 (getTok().is(AsmToken::Star) && MAI.getStarIsPC()))
1187 ShouldGenerateTempSymbol = true;
1188
1189 if (!ShouldGenerateTempSymbol)
1190 return Error(FirstTokenLoc, "invalid token in expression");
1191
1192 // Eat the '$'|'*' token.
1193 Lex();
1194 // This is either a '$'|'*' reference, which references the current PC.
1195 // Emit a temporary label to the streamer and refer to it.
1196 MCSymbol *Sym = Ctx.createTempSymbol();
1197 Out.emitLabel(Sym);
1199 getContext());
1200 EndLoc = FirstTokenLoc;
1201 return false;
1202 }
1203 }
1204 // Parse symbol variant
1205 std::pair<StringRef, StringRef> Split;
1206 if (!MAI.useParensForSymbolVariant()) {
1207 if (FirstTokenKind == AsmToken::String) {
1208 if (Lexer.is(AsmToken::At)) {
1209 Lex(); // eat @
1210 SMLoc AtLoc = getLexer().getLoc();
1211 StringRef VName;
1212 if (parseIdentifier(VName))
1213 return Error(AtLoc, "expected symbol variant after '@'");
1214
1215 Split = std::make_pair(Identifier, VName);
1216 }
1217 } else {
1218 Split = Identifier.split('@');
1219 }
1220 } else if (Lexer.is(AsmToken::LParen)) {
1221 Lex(); // eat '('.
1222 StringRef VName;
1223 parseIdentifier(VName);
1224 if (parseRParen())
1225 return true;
1226 Split = std::make_pair(Identifier, VName);
1227 }
1228
1229 EndLoc = SMLoc::getFromPointer(Identifier.end());
1230
1231 // This is a symbol reference.
1233 if (SymbolName.empty())
1234 return Error(getLexer().getLoc(), "expected a symbol reference");
1235
1237
1238 // Lookup the symbol variant if used.
1239 if (!Split.second.empty()) {
1240 Variant = getTargetParser().getVariantKindForName(Split.second);
1241 if (Variant != MCSymbolRefExpr::VK_Invalid) {
1242 SymbolName = Split.first;
1243 } else if (MAI.doesAllowAtInName() && !MAI.useParensForSymbolVariant()) {
1245 } else {
1246 return Error(SMLoc::getFromPointer(Split.second.begin()),
1247 "invalid variant '" + Split.second + "'");
1248 }
1249 }
1250
1251 MCSymbol *Sym = getContext().getInlineAsmLabel(SymbolName);
1252 if (!Sym)
1253 Sym = getContext().getOrCreateSymbol(
1254 MAI.shouldEmitLabelsInUpperCase() ? SymbolName.upper() : SymbolName);
1255
1256 // If this is an absolute variable reference, substitute it now to preserve
1257 // semantics in the face of reassignment.
1258 if (Sym->isVariable()) {
1259 auto V = Sym->getVariableValue(/*SetUsed*/ false);
1260 bool DoInline = isa<MCConstantExpr>(V) && !Variant;
1261 if (auto TV = dyn_cast<MCTargetExpr>(V))
1262 DoInline = TV->inlineAssignedExpr();
1263 if (DoInline) {
1264 if (Variant)
1265 return Error(EndLoc, "unexpected modifier on variable reference");
1266 Res = Sym->getVariableValue(/*SetUsed*/ false);
1267 return false;
1268 }
1269 }
1270
1271 // Otherwise create a symbol ref.
1272 Res = MCSymbolRefExpr::create(Sym, Variant, getContext(), FirstTokenLoc);
1273 return false;
1274 }
1275 case AsmToken::BigNum:
1276 return TokError("literal value out of range for directive");
1277 case AsmToken::Integer: {
1278 SMLoc Loc = getTok().getLoc();
1279 int64_t IntVal = getTok().getIntVal();
1280 Res = MCConstantExpr::create(IntVal, getContext());
1281 EndLoc = Lexer.getTok().getEndLoc();
1282 Lex(); // Eat token.
1283 // Look for 'b' or 'f' following an Integer as a directional label
1284 if (Lexer.getKind() == AsmToken::Identifier) {
1285 StringRef IDVal = getTok().getString();
1286 // Lookup the symbol variant if used.
1287 std::pair<StringRef, StringRef> Split = IDVal.split('@');
1289 if (Split.first.size() != IDVal.size()) {
1291 if (Variant == MCSymbolRefExpr::VK_Invalid)
1292 return TokError("invalid variant '" + Split.second + "'");
1293 IDVal = Split.first;
1294 }
1295 if (IDVal == "f" || IDVal == "b") {
1296 MCSymbol *Sym =
1297 Ctx.getDirectionalLocalSymbol(IntVal, IDVal == "b");
1298 Res = MCSymbolRefExpr::create(Sym, Variant, getContext());
1299 if (IDVal == "b" && Sym->isUndefined())
1300 return Error(Loc, "directional label undefined");
1301 DirLabels.push_back(std::make_tuple(Loc, CppHashInfo, Sym));
1302 EndLoc = Lexer.getTok().getEndLoc();
1303 Lex(); // Eat identifier.
1304 }
1305 }
1306 return false;
1307 }
1308 case AsmToken::Real: {
1309 APFloat RealVal(APFloat::IEEEdouble(), getTok().getString());
1310 uint64_t IntVal = RealVal.bitcastToAPInt().getZExtValue();
1311 Res = MCConstantExpr::create(IntVal, getContext());
1312 EndLoc = Lexer.getTok().getEndLoc();
1313 Lex(); // Eat token.
1314 return false;
1315 }
1316 case AsmToken::Dot: {
1317 if (!MAI.getDotIsPC())
1318 return TokError("cannot use . as current PC");
1319
1320 // This is a '.' reference, which references the current PC. Emit a
1321 // temporary label to the streamer and refer to it.
1322 MCSymbol *Sym = Ctx.createTempSymbol();
1323 Out.emitLabel(Sym);
1325 EndLoc = Lexer.getTok().getEndLoc();
1326 Lex(); // Eat identifier.
1327 return false;
1328 }
1329 case AsmToken::LParen:
1330 Lex(); // Eat the '('.
1331 return parseParenExpr(Res, EndLoc);
1332 case AsmToken::LBrac:
1333 if (!PlatformParser->HasBracketExpressions())
1334 return TokError("brackets expression not supported on this target");
1335 Lex(); // Eat the '['.
1336 return parseBracketExpr(Res, EndLoc);
1337 case AsmToken::Minus:
1338 Lex(); // Eat the operator.
1339 if (parsePrimaryExpr(Res, EndLoc, TypeInfo))
1340 return true;
1341 Res = MCUnaryExpr::createMinus(Res, getContext(), FirstTokenLoc);
1342 return false;
1343 case AsmToken::Plus:
1344 Lex(); // Eat the operator.
1345 if (parsePrimaryExpr(Res, EndLoc, TypeInfo))
1346 return true;
1347 Res = MCUnaryExpr::createPlus(Res, getContext(), FirstTokenLoc);
1348 return false;
1349 case AsmToken::Tilde:
1350 Lex(); // Eat the operator.
1351 if (parsePrimaryExpr(Res, EndLoc, TypeInfo))
1352 return true;
1353 Res = MCUnaryExpr::createNot(Res, getContext(), FirstTokenLoc);
1354 return false;
1355 // MIPS unary expression operators. The lexer won't generate these tokens if
1356 // MCAsmInfo::HasMipsExpressions is false for the target.
1381 Lex(); // Eat the operator.
1382 if (Lexer.isNot(AsmToken::LParen))
1383 return TokError("expected '(' after operator");
1384 Lex(); // Eat the operator.
1385 if (parseExpression(Res, EndLoc))
1386 return true;
1387 if (parseRParen())
1388 return true;
1389 Res = getTargetParser().createTargetUnaryExpr(Res, FirstTokenKind, Ctx);
1390 return !Res;
1391 }
1392}
1393
1394bool AsmParser::parseExpression(const MCExpr *&Res) {
1395 SMLoc EndLoc;
1396 return parseExpression(Res, EndLoc);
1397}
1398
1399const MCExpr *
1400AsmParser::applyModifierToExpr(const MCExpr *E,
1402 // Ask the target implementation about this expression first.
1403 const MCExpr *NewE = getTargetParser().applyModifierToExpr(E, Variant, Ctx);
1404 if (NewE)
1405 return NewE;
1406 // Recurse over the given expression, rebuilding it to apply the given variant
1407 // if there is exactly one symbol.
1408 switch (E->getKind()) {
1409 case MCExpr::Target:
1410 case MCExpr::Constant:
1411 return nullptr;
1412
1413 case MCExpr::SymbolRef: {
1414 const MCSymbolRefExpr *SRE = cast<MCSymbolRefExpr>(E);
1415
1416 if (SRE->getKind() != MCSymbolRefExpr::VK_None) {
1417 TokError("invalid variant on expression '" + getTok().getIdentifier() +
1418 "' (already modified)");
1419 return E;
1420 }
1421
1422 return MCSymbolRefExpr::create(&SRE->getSymbol(), Variant, getContext());
1423 }
1424
1425 case MCExpr::Unary: {
1426 const MCUnaryExpr *UE = cast<MCUnaryExpr>(E);
1427 const MCExpr *Sub = applyModifierToExpr(UE->getSubExpr(), Variant);
1428 if (!Sub)
1429 return nullptr;
1430 return MCUnaryExpr::create(UE->getOpcode(), Sub, getContext());
1431 }
1432
1433 case MCExpr::Binary: {
1434 const MCBinaryExpr *BE = cast<MCBinaryExpr>(E);
1435 const MCExpr *LHS = applyModifierToExpr(BE->getLHS(), Variant);
1436 const MCExpr *RHS = applyModifierToExpr(BE->getRHS(), Variant);
1437
1438 if (!LHS && !RHS)
1439 return nullptr;
1440
1441 if (!LHS)
1442 LHS = BE->getLHS();
1443 if (!RHS)
1444 RHS = BE->getRHS();
1445
1446 return MCBinaryExpr::create(BE->getOpcode(), LHS, RHS, getContext());
1447 }
1448 }
1449
1450 llvm_unreachable("Invalid expression kind!");
1451}
1452
1453/// This function checks if the next token is <string> type or arithmetic.
1454/// string that begin with character '<' must end with character '>'.
1455/// otherwise it is arithmetics.
1456/// If the function returns a 'true' value,
1457/// the End argument will be filled with the last location pointed to the '>'
1458/// character.
1459
1460/// There is a gap between the AltMacro's documentation and the single quote
1461/// implementation. GCC does not fully support this feature and so we will not
1462/// support it.
1463/// TODO: Adding single quote as a string.
1464static bool isAngleBracketString(SMLoc &StrLoc, SMLoc &EndLoc) {
1465 assert((StrLoc.getPointer() != nullptr) &&
1466 "Argument to the function cannot be a NULL value");
1467 const char *CharPtr = StrLoc.getPointer();
1468 while ((*CharPtr != '>') && (*CharPtr != '\n') && (*CharPtr != '\r') &&
1469 (*CharPtr != '\0')) {
1470 if (*CharPtr == '!')
1471 CharPtr++;
1472 CharPtr++;
1473 }
1474 if (*CharPtr == '>') {
1475 EndLoc = StrLoc.getFromPointer(CharPtr + 1);
1476 return true;
1477 }
1478 return false;
1479}
1480
1481/// creating a string without the escape characters '!'.
1482static std::string angleBracketString(StringRef AltMacroStr) {
1483 std::string Res;
1484 for (size_t Pos = 0; Pos < AltMacroStr.size(); Pos++) {
1485 if (AltMacroStr[Pos] == '!')
1486 Pos++;
1487 Res += AltMacroStr[Pos];
1488 }
1489 return Res;
1490}
1491
1492/// Parse an expression and return it.
1493///
1494/// expr ::= expr &&,|| expr -> lowest.
1495/// expr ::= expr |,^,&,! expr
1496/// expr ::= expr ==,!=,<>,<,<=,>,>= expr
1497/// expr ::= expr <<,>> expr
1498/// expr ::= expr +,- expr
1499/// expr ::= expr *,/,% expr -> highest.
1500/// expr ::= primaryexpr
1501///
1502bool AsmParser::parseExpression(const MCExpr *&Res, SMLoc &EndLoc) {
1503 // Parse the expression.
1504 Res = nullptr;
1505 if (getTargetParser().parsePrimaryExpr(Res, EndLoc) ||
1506 parseBinOpRHS(1, Res, EndLoc))
1507 return true;
1508
1509 // As a special case, we support 'a op b @ modifier' by rewriting the
1510 // expression to include the modifier. This is inefficient, but in general we
1511 // expect users to use 'a@modifier op b'.
1512 if (Lexer.getKind() == AsmToken::At) {
1513 Lex();
1514
1515 if (Lexer.isNot(AsmToken::Identifier))
1516 return TokError("unexpected symbol modifier following '@'");
1517
1519 MCSymbolRefExpr::getVariantKindForName(getTok().getIdentifier());
1520 if (Variant == MCSymbolRefExpr::VK_Invalid)
1521 return TokError("invalid variant '" + getTok().getIdentifier() + "'");
1522
1523 const MCExpr *ModifiedRes = applyModifierToExpr(Res, Variant);
1524 if (!ModifiedRes) {
1525 return TokError("invalid modifier '" + getTok().getIdentifier() +
1526 "' (no symbols present)");
1527 }
1528
1529 Res = ModifiedRes;
1530 Lex();
1531 }
1532
1533 // Try to constant fold it up front, if possible. Do not exploit
1534 // assembler here.
1535 int64_t Value;
1536 if (Res->evaluateAsAbsolute(Value))
1537 Res = MCConstantExpr::create(Value, getContext());
1538
1539 return false;
1540}
1541
1542bool AsmParser::parseParenExpression(const MCExpr *&Res, SMLoc &EndLoc) {
1543 Res = nullptr;
1544 return parseParenExpr(Res, EndLoc) || parseBinOpRHS(1, Res, EndLoc);
1545}
1546
1547bool AsmParser::parseParenExprOfDepth(unsigned ParenDepth, const MCExpr *&Res,
1548 SMLoc &EndLoc) {
1549 if (parseParenExpr(Res, EndLoc))
1550 return true;
1551
1552 for (; ParenDepth > 0; --ParenDepth) {
1553 if (parseBinOpRHS(1, Res, EndLoc))
1554 return true;
1555
1556 // We don't Lex() the last RParen.
1557 // This is the same behavior as parseParenExpression().
1558 if (ParenDepth - 1 > 0) {
1559 EndLoc = getTok().getEndLoc();
1560 if (parseRParen())
1561 return true;
1562 }
1563 }
1564 return false;
1565}
1566
1567bool AsmParser::parseAbsoluteExpression(int64_t &Res) {
1568 const MCExpr *Expr;
1569
1570 SMLoc StartLoc = Lexer.getLoc();
1571 if (parseExpression(Expr))
1572 return true;
1573
1574 if (!Expr->evaluateAsAbsolute(Res, getStreamer().getAssemblerPtr()))
1575 return Error(StartLoc, "expected absolute expression");
1576
1577 return false;
1578}
1579
1582 bool ShouldUseLogicalShr) {
1583 switch (K) {
1584 default:
1585 return 0; // not a binop.
1586
1587 // Lowest Precedence: &&, ||
1588 case AsmToken::AmpAmp:
1589 Kind = MCBinaryExpr::LAnd;
1590 return 1;
1591 case AsmToken::PipePipe:
1592 Kind = MCBinaryExpr::LOr;
1593 return 1;
1594
1595 // Low Precedence: |, &, ^
1596 case AsmToken::Pipe:
1597 Kind = MCBinaryExpr::Or;
1598 return 2;
1599 case AsmToken::Caret:
1600 Kind = MCBinaryExpr::Xor;
1601 return 2;
1602 case AsmToken::Amp:
1603 Kind = MCBinaryExpr::And;
1604 return 2;
1605
1606 // Low Intermediate Precedence: ==, !=, <>, <, <=, >, >=
1608 Kind = MCBinaryExpr::EQ;
1609 return 3;
1612 Kind = MCBinaryExpr::NE;
1613 return 3;
1614 case AsmToken::Less:
1615 Kind = MCBinaryExpr::LT;
1616 return 3;
1618 Kind = MCBinaryExpr::LTE;
1619 return 3;
1620 case AsmToken::Greater:
1621 Kind = MCBinaryExpr::GT;
1622 return 3;
1624 Kind = MCBinaryExpr::GTE;
1625 return 3;
1626
1627 // Intermediate Precedence: <<, >>
1628 case AsmToken::LessLess:
1629 Kind = MCBinaryExpr::Shl;
1630 return 4;
1632 Kind = ShouldUseLogicalShr ? MCBinaryExpr::LShr : MCBinaryExpr::AShr;
1633 return 4;
1634
1635 // High Intermediate Precedence: +, -
1636 case AsmToken::Plus:
1637 Kind = MCBinaryExpr::Add;
1638 return 5;
1639 case AsmToken::Minus:
1640 Kind = MCBinaryExpr::Sub;
1641 return 5;
1642
1643 // Highest Precedence: *, /, %
1644 case AsmToken::Star:
1645 Kind = MCBinaryExpr::Mul;
1646 return 6;
1647 case AsmToken::Slash:
1648 Kind = MCBinaryExpr::Div;
1649 return 6;
1650 case AsmToken::Percent:
1651 Kind = MCBinaryExpr::Mod;
1652 return 6;
1653 }
1654}
1655
1656static unsigned getGNUBinOpPrecedence(const MCAsmInfo &MAI,
1659 bool ShouldUseLogicalShr) {
1660 switch (K) {
1661 default:
1662 return 0; // not a binop.
1663
1664 // Lowest Precedence: &&, ||
1665 case AsmToken::AmpAmp:
1666 Kind = MCBinaryExpr::LAnd;
1667 return 2;
1668 case AsmToken::PipePipe:
1669 Kind = MCBinaryExpr::LOr;
1670 return 1;
1671
1672 // Low Precedence: ==, !=, <>, <, <=, >, >=
1674 Kind = MCBinaryExpr::EQ;
1675 return 3;
1678 Kind = MCBinaryExpr::NE;
1679 return 3;
1680 case AsmToken::Less:
1681 Kind = MCBinaryExpr::LT;
1682 return 3;
1684 Kind = MCBinaryExpr::LTE;
1685 return 3;
1686 case AsmToken::Greater:
1687 Kind = MCBinaryExpr::GT;
1688 return 3;
1690 Kind = MCBinaryExpr::GTE;
1691 return 3;
1692
1693 // Low Intermediate Precedence: +, -
1694 case AsmToken::Plus:
1695 Kind = MCBinaryExpr::Add;
1696 return 4;
1697 case AsmToken::Minus:
1698 Kind = MCBinaryExpr::Sub;
1699 return 4;
1700
1701 // High Intermediate Precedence: |, !, &, ^
1702 //
1703 case AsmToken::Pipe:
1704 Kind = MCBinaryExpr::Or;
1705 return 5;
1706 case AsmToken::Exclaim:
1707 // Hack to support ARM compatible aliases (implied 'sp' operand in 'srs*'
1708 // instructions like 'srsda #31!') and not parse ! as an infix operator.
1709 if (MAI.getCommentString() == "@")
1710 return 0;
1711 Kind = MCBinaryExpr::OrNot;
1712 return 5;
1713 case AsmToken::Caret:
1714 Kind = MCBinaryExpr::Xor;
1715 return 5;
1716 case AsmToken::Amp:
1717 Kind = MCBinaryExpr::And;
1718 return 5;
1719
1720 // Highest Precedence: *, /, %, <<, >>
1721 case AsmToken::Star:
1722 Kind = MCBinaryExpr::Mul;
1723 return 6;
1724 case AsmToken::Slash:
1725 Kind = MCBinaryExpr::Div;
1726 return 6;
1727 case AsmToken::Percent:
1728 Kind = MCBinaryExpr::Mod;
1729 return 6;
1730 case AsmToken::LessLess:
1731 Kind = MCBinaryExpr::Shl;
1732 return 6;
1734 Kind = ShouldUseLogicalShr ? MCBinaryExpr::LShr : MCBinaryExpr::AShr;
1735 return 6;
1736 }
1737}
1738
1739unsigned AsmParser::getBinOpPrecedence(AsmToken::TokenKind K,
1740 MCBinaryExpr::Opcode &Kind) {
1741 bool ShouldUseLogicalShr = MAI.shouldUseLogicalShr();
1742 return IsDarwin ? getDarwinBinOpPrecedence(K, Kind, ShouldUseLogicalShr)
1743 : getGNUBinOpPrecedence(MAI, K, Kind, ShouldUseLogicalShr);
1744}
1745
1746/// Parse all binary operators with precedence >= 'Precedence'.
1747/// Res contains the LHS of the expression on input.
1748bool AsmParser::parseBinOpRHS(unsigned Precedence, const MCExpr *&Res,
1749 SMLoc &EndLoc) {
1750 SMLoc StartLoc = Lexer.getLoc();
1751 while (true) {
1753 unsigned TokPrec = getBinOpPrecedence(Lexer.getKind(), Kind);
1754
1755 // If the next token is lower precedence than we are allowed to eat, return
1756 // successfully with what we ate already.
1757 if (TokPrec < Precedence)
1758 return false;
1759
1760 Lex();
1761
1762 // Eat the next primary expression.
1763 const MCExpr *RHS;
1764 if (getTargetParser().parsePrimaryExpr(RHS, EndLoc))
1765 return true;
1766
1767 // If BinOp binds less tightly with RHS than the operator after RHS, let
1768 // the pending operator take RHS as its LHS.
1770 unsigned NextTokPrec = getBinOpPrecedence(Lexer.getKind(), Dummy);
1771 if (TokPrec < NextTokPrec && parseBinOpRHS(TokPrec + 1, RHS, EndLoc))
1772 return true;
1773
1774 // Merge LHS and RHS according to operator.
1775 Res = MCBinaryExpr::create(Kind, Res, RHS, getContext(), StartLoc);
1776 }
1777}
1778
1779/// ParseStatement:
1780/// ::= EndOfStatement
1781/// ::= Label* Directive ...Operands... EndOfStatement
1782/// ::= Label* Identifier OperandList* EndOfStatement
1783bool AsmParser::parseStatement(ParseStatementInfo &Info,
1785 assert(!hasPendingError() && "parseStatement started with pending error");
1786 // Eat initial spaces and comments
1787 while (Lexer.is(AsmToken::Space))
1788 Lex();
1789 if (Lexer.is(AsmToken::EndOfStatement)) {
1790 // if this is a line comment we can drop it safely
1791 if (getTok().getString().empty() || getTok().getString().front() == '\r' ||
1792 getTok().getString().front() == '\n')
1793 Out.addBlankLine();
1794 Lex();
1795 return false;
1796 }
1797 // Statements always start with an identifier.
1798 AsmToken ID = getTok();
1799 SMLoc IDLoc = ID.getLoc();
1800 StringRef IDVal;
1801 int64_t LocalLabelVal = -1;
1802 StartTokLoc = ID.getLoc();
1803 if (Lexer.is(AsmToken::HashDirective))
1804 return parseCppHashLineFilenameComment(IDLoc,
1805 !isInsideMacroInstantiation());
1806
1807 // Allow an integer followed by a ':' as a directional local label.
1808 if (Lexer.is(AsmToken::Integer)) {
1809 LocalLabelVal = getTok().getIntVal();
1810 if (LocalLabelVal < 0) {
1811 if (!TheCondState.Ignore) {
1812 Lex(); // always eat a token
1813 return Error(IDLoc, "unexpected token at start of statement");
1814 }
1815 IDVal = "";
1816 } else {
1817 IDVal = getTok().getString();
1818 Lex(); // Consume the integer token to be used as an identifier token.
1819 if (Lexer.getKind() != AsmToken::Colon) {
1820 if (!TheCondState.Ignore) {
1821 Lex(); // always eat a token
1822 return Error(IDLoc, "unexpected token at start of statement");
1823 }
1824 }
1825 }
1826 } else if (Lexer.is(AsmToken::Dot)) {
1827 // Treat '.' as a valid identifier in this context.
1828 Lex();
1829 IDVal = ".";
1830 } else if (Lexer.is(AsmToken::LCurly)) {
1831 // Treat '{' as a valid identifier in this context.
1832 Lex();
1833 IDVal = "{";
1834
1835 } else if (Lexer.is(AsmToken::RCurly)) {
1836 // Treat '}' as a valid identifier in this context.
1837 Lex();
1838 IDVal = "}";
1839 } else if (Lexer.is(AsmToken::Star) &&
1840 getTargetParser().starIsStartOfStatement()) {
1841 // Accept '*' as a valid start of statement.
1842 Lex();
1843 IDVal = "*";
1844 } else if (parseIdentifier(IDVal)) {
1845 if (!TheCondState.Ignore) {
1846 Lex(); // always eat a token
1847 return Error(IDLoc, "unexpected token at start of statement");
1848 }
1849 IDVal = "";
1850 }
1851
1852 // Handle conditional assembly here before checking for skipping. We
1853 // have to do this so that .endif isn't skipped in a ".if 0" block for
1854 // example.
1856 DirectiveKindMap.find(IDVal.lower());
1857 DirectiveKind DirKind = (DirKindIt == DirectiveKindMap.end())
1858 ? DK_NO_DIRECTIVE
1859 : DirKindIt->getValue();
1860 switch (DirKind) {
1861 default:
1862 break;
1863 case DK_IF:
1864 case DK_IFEQ:
1865 case DK_IFGE:
1866 case DK_IFGT:
1867 case DK_IFLE:
1868 case DK_IFLT:
1869 case DK_IFNE:
1870 return parseDirectiveIf(IDLoc, DirKind);
1871 case DK_IFB:
1872 return parseDirectiveIfb(IDLoc, true);
1873 case DK_IFNB:
1874 return parseDirectiveIfb(IDLoc, false);
1875 case DK_IFC:
1876 return parseDirectiveIfc(IDLoc, true);
1877 case DK_IFEQS:
1878 return parseDirectiveIfeqs(IDLoc, true);
1879 case DK_IFNC:
1880 return parseDirectiveIfc(IDLoc, false);
1881 case DK_IFNES:
1882 return parseDirectiveIfeqs(IDLoc, false);
1883 case DK_IFDEF:
1884 return parseDirectiveIfdef(IDLoc, true);
1885 case DK_IFNDEF:
1886 case DK_IFNOTDEF:
1887 return parseDirectiveIfdef(IDLoc, false);
1888 case DK_ELSEIF:
1889 return parseDirectiveElseIf(IDLoc);
1890 case DK_ELSE:
1891 return parseDirectiveElse(IDLoc);
1892 case DK_ENDIF:
1893 return parseDirectiveEndIf(IDLoc);
1894 }
1895
1896 // Ignore the statement if in the middle of inactive conditional
1897 // (e.g. ".if 0").
1898 if (TheCondState.Ignore) {
1899 eatToEndOfStatement();
1900 return false;
1901 }
1902
1903 // FIXME: Recurse on local labels?
1904
1905 // Check for a label.
1906 // ::= identifier ':'
1907 // ::= number ':'
1908 if (Lexer.is(AsmToken::Colon) && getTargetParser().isLabel(ID)) {
1909 if (checkForValidSection())
1910 return true;
1911
1912 Lex(); // Consume the ':'.
1913
1914 // Diagnose attempt to use '.' as a label.
1915 if (IDVal == ".")
1916 return Error(IDLoc, "invalid use of pseudo-symbol '.' as a label");
1917
1918 // Diagnose attempt to use a variable as a label.
1919 //
1920 // FIXME: Diagnostics. Note the location of the definition as a label.
1921 // FIXME: This doesn't diagnose assignment to a symbol which has been
1922 // implicitly marked as external.
1923 MCSymbol *Sym;
1924 if (LocalLabelVal == -1) {
1925 if (ParsingMSInlineAsm && SI) {
1926 StringRef RewrittenLabel =
1927 SI->LookupInlineAsmLabel(IDVal, getSourceManager(), IDLoc, true);
1928 assert(!RewrittenLabel.empty() &&
1929 "We should have an internal name here.");
1930 Info.AsmRewrites->emplace_back(AOK_Label, IDLoc, IDVal.size(),
1931 RewrittenLabel);
1932 IDVal = RewrittenLabel;
1933 }
1934 Sym = getContext().getOrCreateSymbol(IDVal);
1935 } else
1936 Sym = Ctx.createDirectionalLocalSymbol(LocalLabelVal);
1937 // End of Labels should be treated as end of line for lexing
1938 // purposes but that information is not available to the Lexer who
1939 // does not understand Labels. This may cause us to see a Hash
1940 // here instead of a preprocessor line comment.
1941 if (getTok().is(AsmToken::Hash)) {
1942 StringRef CommentStr = parseStringToEndOfStatement();
1943 Lexer.Lex();
1944 Lexer.UnLex(AsmToken(AsmToken::EndOfStatement, CommentStr));
1945 }
1946
1947 // Consume any end of statement token, if present, to avoid spurious
1948 // addBlankLine calls().
1949 if (getTok().is(AsmToken::EndOfStatement)) {
1950 Lex();
1951 }
1952
1953 if (MAI.hasSubsectionsViaSymbols() && CFIStartProcLoc && Sym->isExternal())
1954 return Error(StartTokLoc, "non-private labels cannot appear between "
1955 ".cfi_startproc / .cfi_endproc pairs") &&
1956 Error(*CFIStartProcLoc, "previous .cfi_startproc was here");
1957
1958 if (discardLTOSymbol(IDVal))
1959 return false;
1960
1961 getTargetParser().doBeforeLabelEmit(Sym, IDLoc);
1962
1963 // Emit the label.
1964 if (!getTargetParser().isParsingMSInlineAsm())
1965 Out.emitLabel(Sym, IDLoc);
1966
1967 // If we are generating dwarf for assembly source files then gather the
1968 // info to make a dwarf label entry for this label if needed.
1969 if (enabledGenDwarfForAssembly())
1970 MCGenDwarfLabelEntry::Make(Sym, &getStreamer(), getSourceManager(),
1971 IDLoc);
1972
1973 getTargetParser().onLabelParsed(Sym);
1974
1975 return false;
1976 }
1977
1978 // Check for an assignment statement.
1979 // ::= identifier '='
1980 if (Lexer.is(AsmToken::Equal) && getTargetParser().equalIsAsmAssignment()) {
1981 Lex();
1982 return parseAssignment(IDVal, AssignmentKind::Equal);
1983 }
1984
1985 // If macros are enabled, check to see if this is a macro instantiation.
1986 if (areMacrosEnabled())
1987 if (const MCAsmMacro *M = getContext().lookupMacro(IDVal)) {
1988 return handleMacroEntry(M, IDLoc);
1989 }
1990
1991 // Otherwise, we have a normal instruction or directive.
1992
1993 // Directives start with "."
1994 if (IDVal.starts_with(".") && IDVal != ".") {
1995 // There are several entities interested in parsing directives:
1996 //
1997 // 1. The target-specific assembly parser. Some directives are target
1998 // specific or may potentially behave differently on certain targets.
1999 // 2. Asm parser extensions. For example, platform-specific parsers
2000 // (like the ELF parser) register themselves as extensions.
2001 // 3. The generic directive parser implemented by this class. These are
2002 // all the directives that behave in a target and platform independent
2003 // manner, or at least have a default behavior that's shared between
2004 // all targets and platforms.
2005
2006 getTargetParser().flushPendingInstructions(getStreamer());
2007
2008 ParseStatus TPDirectiveReturn = getTargetParser().parseDirective(ID);
2009 assert(TPDirectiveReturn.isFailure() == hasPendingError() &&
2010 "Should only return Failure iff there was an error");
2011 if (TPDirectiveReturn.isFailure())
2012 return true;
2013 if (TPDirectiveReturn.isSuccess())
2014 return false;
2015
2016 // Next, check the extension directive map to see if any extension has
2017 // registered itself to parse this directive.
2018 std::pair<MCAsmParserExtension *, DirectiveHandler> Handler =
2019 ExtensionDirectiveMap.lookup(IDVal);
2020 if (Handler.first)
2021 return (*Handler.second)(Handler.first, IDVal, IDLoc);
2022
2023 // Finally, if no one else is interested in this directive, it must be
2024 // generic and familiar to this class.
2025 switch (DirKind) {
2026 default:
2027 break;
2028 case DK_SET:
2029 case DK_EQU:
2030 return parseDirectiveSet(IDVal, AssignmentKind::Set);
2031 case DK_EQUIV:
2032 return parseDirectiveSet(IDVal, AssignmentKind::Equiv);
2033 case DK_LTO_SET_CONDITIONAL:
2034 return parseDirectiveSet(IDVal, AssignmentKind::LTOSetConditional);
2035 case DK_ASCII:
2036 return parseDirectiveAscii(IDVal, false);
2037 case DK_ASCIZ:
2038 case DK_STRING:
2039 return parseDirectiveAscii(IDVal, true);
2040 case DK_BYTE:
2041 case DK_DC_B:
2042 return parseDirectiveValue(IDVal, 1);
2043 case DK_DC:
2044 case DK_DC_W:
2045 case DK_SHORT:
2046 case DK_VALUE:
2047 case DK_2BYTE:
2048 return parseDirectiveValue(IDVal, 2);
2049 case DK_LONG:
2050 case DK_INT:
2051 case DK_4BYTE:
2052 case DK_DC_L:
2053 return parseDirectiveValue(IDVal, 4);
2054 case DK_QUAD:
2055 case DK_8BYTE:
2056 return parseDirectiveValue(IDVal, 8);
2057 case DK_DC_A:
2058 return parseDirectiveValue(
2059 IDVal, getContext().getAsmInfo()->getCodePointerSize());
2060 case DK_OCTA:
2061 return parseDirectiveOctaValue(IDVal);
2062 case DK_SINGLE:
2063 case DK_FLOAT:
2064 case DK_DC_S:
2065 return parseDirectiveRealValue(IDVal, APFloat::IEEEsingle());
2066 case DK_DOUBLE:
2067 case DK_DC_D:
2068 return parseDirectiveRealValue(IDVal, APFloat::IEEEdouble());
2069 case DK_ALIGN: {
2070 bool IsPow2 = !getContext().getAsmInfo()->getAlignmentIsInBytes();
2071 return parseDirectiveAlign(IsPow2, /*ExprSize=*/1);
2072 }
2073 case DK_ALIGN32: {
2074 bool IsPow2 = !getContext().getAsmInfo()->getAlignmentIsInBytes();
2075 return parseDirectiveAlign(IsPow2, /*ExprSize=*/4);
2076 }
2077 case DK_BALIGN:
2078 return parseDirectiveAlign(/*IsPow2=*/false, /*ExprSize=*/1);
2079 case DK_BALIGNW:
2080 return parseDirectiveAlign(/*IsPow2=*/false, /*ExprSize=*/2);
2081 case DK_BALIGNL:
2082 return parseDirectiveAlign(/*IsPow2=*/false, /*ExprSize=*/4);
2083 case DK_P2ALIGN:
2084 return parseDirectiveAlign(/*IsPow2=*/true, /*ExprSize=*/1);
2085 case DK_P2ALIGNW:
2086 return parseDirectiveAlign(/*IsPow2=*/true, /*ExprSize=*/2);
2087 case DK_P2ALIGNL:
2088 return parseDirectiveAlign(/*IsPow2=*/true, /*ExprSize=*/4);
2089 case DK_ORG:
2090 return parseDirectiveOrg();
2091 case DK_FILL:
2092 return parseDirectiveFill();
2093 case DK_ZERO:
2094 return parseDirectiveZero();
2095 case DK_EXTERN:
2096 eatToEndOfStatement(); // .extern is the default, ignore it.
2097 return false;
2098 case DK_GLOBL:
2099 case DK_GLOBAL:
2100 return parseDirectiveSymbolAttribute(MCSA_Global);
2101 case DK_LAZY_REFERENCE:
2102 return parseDirectiveSymbolAttribute(MCSA_LazyReference);
2103 case DK_NO_DEAD_STRIP:
2104 return parseDirectiveSymbolAttribute(MCSA_NoDeadStrip);
2105 case DK_SYMBOL_RESOLVER:
2106 return parseDirectiveSymbolAttribute(MCSA_SymbolResolver);
2107 case DK_PRIVATE_EXTERN:
2108 return parseDirectiveSymbolAttribute(MCSA_PrivateExtern);
2109 case DK_REFERENCE:
2110 return parseDirectiveSymbolAttribute(MCSA_Reference);
2111 case DK_WEAK_DEFINITION:
2112 return parseDirectiveSymbolAttribute(MCSA_WeakDefinition);
2113 case DK_WEAK_REFERENCE:
2114 return parseDirectiveSymbolAttribute(MCSA_WeakReference);
2115 case DK_WEAK_DEF_CAN_BE_HIDDEN:
2116 return parseDirectiveSymbolAttribute(MCSA_WeakDefAutoPrivate);
2117 case DK_COLD:
2118 return parseDirectiveSymbolAttribute(MCSA_Cold);
2119 case DK_COMM:
2120 case DK_COMMON:
2121 return parseDirectiveComm(/*IsLocal=*/false);
2122 case DK_LCOMM:
2123 return parseDirectiveComm(/*IsLocal=*/true);
2124 case DK_ABORT:
2125 return parseDirectiveAbort();
2126 case DK_INCLUDE:
2127 return parseDirectiveInclude();
2128 case DK_INCBIN:
2129 return parseDirectiveIncbin();
2130 case DK_CODE16:
2131 case DK_CODE16GCC:
2132 return TokError(Twine(IDVal) +
2133 " not currently supported for this target");
2134 case DK_REPT:
2135 return parseDirectiveRept(IDLoc, IDVal);
2136 case DK_IRP:
2137 return parseDirectiveIrp(IDLoc);
2138 case DK_IRPC:
2139 return parseDirectiveIrpc(IDLoc);
2140 case DK_ENDR:
2141 return parseDirectiveEndr(IDLoc);
2142 case DK_BUNDLE_ALIGN_MODE:
2143 return parseDirectiveBundleAlignMode();
2144 case DK_BUNDLE_LOCK:
2145 return parseDirectiveBundleLock();
2146 case DK_BUNDLE_UNLOCK:
2147 return parseDirectiveBundleUnlock();
2148 case DK_SLEB128:
2149 return parseDirectiveLEB128(true);
2150 case DK_ULEB128:
2151 return parseDirectiveLEB128(false);
2152 case DK_SPACE:
2153 case DK_SKIP:
2154 return parseDirectiveSpace(IDVal);
2155 case DK_FILE:
2156 return parseDirectiveFile(IDLoc);
2157 case DK_LINE:
2158 return parseDirectiveLine();
2159 case DK_LOC:
2160 return parseDirectiveLoc();
2161 case DK_STABS:
2162 return parseDirectiveStabs();
2163 case DK_CV_FILE:
2164 return parseDirectiveCVFile();
2165 case DK_CV_FUNC_ID:
2166 return parseDirectiveCVFuncId();
2167 case DK_CV_INLINE_SITE_ID:
2168 return parseDirectiveCVInlineSiteId();
2169 case DK_CV_LOC:
2170 return parseDirectiveCVLoc();
2171 case DK_CV_LINETABLE:
2172 return parseDirectiveCVLinetable();
2173 case DK_CV_INLINE_LINETABLE:
2174 return parseDirectiveCVInlineLinetable();
2175 case DK_CV_DEF_RANGE:
2176 return parseDirectiveCVDefRange();
2177 case DK_CV_STRING:
2178 return parseDirectiveCVString();
2179 case DK_CV_STRINGTABLE:
2180 return parseDirectiveCVStringTable();
2181 case DK_CV_FILECHECKSUMS:
2182 return parseDirectiveCVFileChecksums();
2183 case DK_CV_FILECHECKSUM_OFFSET:
2184 return parseDirectiveCVFileChecksumOffset();
2185 case DK_CV_FPO_DATA:
2186 return parseDirectiveCVFPOData();
2187 case DK_CFI_SECTIONS:
2188 return parseDirectiveCFISections();
2189 case DK_CFI_STARTPROC:
2190 return parseDirectiveCFIStartProc();
2191 case DK_CFI_ENDPROC:
2192 return parseDirectiveCFIEndProc();
2193 case DK_CFI_DEF_CFA:
2194 return parseDirectiveCFIDefCfa(IDLoc);
2195 case DK_CFI_DEF_CFA_OFFSET:
2196 return parseDirectiveCFIDefCfaOffset(IDLoc);
2197 case DK_CFI_ADJUST_CFA_OFFSET:
2198 return parseDirectiveCFIAdjustCfaOffset(IDLoc);
2199 case DK_CFI_DEF_CFA_REGISTER:
2200 return parseDirectiveCFIDefCfaRegister(IDLoc);
2201 case DK_CFI_LLVM_DEF_ASPACE_CFA:
2202 return parseDirectiveCFILLVMDefAspaceCfa(IDLoc);
2203 case DK_CFI_OFFSET:
2204 return parseDirectiveCFIOffset(IDLoc);
2205 case DK_CFI_REL_OFFSET:
2206 return parseDirectiveCFIRelOffset(IDLoc);
2207 case DK_CFI_PERSONALITY:
2208 return parseDirectiveCFIPersonalityOrLsda(true);
2209 case DK_CFI_LSDA:
2210 return parseDirectiveCFIPersonalityOrLsda(false);
2211 case DK_CFI_REMEMBER_STATE:
2212 return parseDirectiveCFIRememberState(IDLoc);
2213 case DK_CFI_RESTORE_STATE:
2214 return parseDirectiveCFIRestoreState(IDLoc);
2215 case DK_CFI_SAME_VALUE:
2216 return parseDirectiveCFISameValue(IDLoc);
2217 case DK_CFI_RESTORE:
2218 return parseDirectiveCFIRestore(IDLoc);
2219 case DK_CFI_ESCAPE:
2220 return parseDirectiveCFIEscape(IDLoc);
2221 case DK_CFI_RETURN_COLUMN:
2222 return parseDirectiveCFIReturnColumn(IDLoc);
2223 case DK_CFI_SIGNAL_FRAME:
2224 return parseDirectiveCFISignalFrame(IDLoc);
2225 case DK_CFI_UNDEFINED:
2226 return parseDirectiveCFIUndefined(IDLoc);
2227 case DK_CFI_REGISTER:
2228 return parseDirectiveCFIRegister(IDLoc);
2229 case DK_CFI_WINDOW_SAVE:
2230 return parseDirectiveCFIWindowSave(IDLoc);
2231 case DK_MACROS_ON:
2232 case DK_MACROS_OFF:
2233 return parseDirectiveMacrosOnOff(IDVal);
2234 case DK_MACRO:
2235 return parseDirectiveMacro(IDLoc);
2236 case DK_ALTMACRO:
2237 case DK_NOALTMACRO:
2238 return parseDirectiveAltmacro(IDVal);
2239 case DK_EXITM:
2240 return parseDirectiveExitMacro(IDVal);
2241 case DK_ENDM:
2242 case DK_ENDMACRO:
2243 return parseDirectiveEndMacro(IDVal);
2244 case DK_PURGEM:
2245 return parseDirectivePurgeMacro(IDLoc);
2246 case DK_END:
2247 return parseDirectiveEnd(IDLoc);
2248 case DK_ERR:
2249 return parseDirectiveError(IDLoc, false);
2250 case DK_ERROR:
2251 return parseDirectiveError(IDLoc, true);
2252 case DK_WARNING:
2253 return parseDirectiveWarning(IDLoc);
2254 case DK_RELOC:
2255 return parseDirectiveReloc(IDLoc);
2256 case DK_DCB:
2257 case DK_DCB_W:
2258 return parseDirectiveDCB(IDVal, 2);
2259 case DK_DCB_B:
2260 return parseDirectiveDCB(IDVal, 1);
2261 case DK_DCB_D:
2262 return parseDirectiveRealDCB(IDVal, APFloat::IEEEdouble());
2263 case DK_DCB_L:
2264 return parseDirectiveDCB(IDVal, 4);
2265 case DK_DCB_S:
2266 return parseDirectiveRealDCB(IDVal, APFloat::IEEEsingle());
2267 case DK_DC_X:
2268 case DK_DCB_X:
2269 return TokError(Twine(IDVal) +
2270 " not currently supported for this target");
2271 case DK_DS:
2272 case DK_DS_W:
2273 return parseDirectiveDS(IDVal, 2);
2274 case DK_DS_B:
2275 return parseDirectiveDS(IDVal, 1);
2276 case DK_DS_D:
2277 return parseDirectiveDS(IDVal, 8);
2278 case DK_DS_L:
2279 case DK_DS_S:
2280 return parseDirectiveDS(IDVal, 4);
2281 case DK_DS_P:
2282 case DK_DS_X:
2283 return parseDirectiveDS(IDVal, 12);
2284 case DK_PRINT:
2285 return parseDirectivePrint(IDLoc);
2286 case DK_ADDRSIG:
2287 return parseDirectiveAddrsig();
2288 case DK_ADDRSIG_SYM:
2289 return parseDirectiveAddrsigSym();
2290 case DK_PSEUDO_PROBE:
2291 return parseDirectivePseudoProbe();
2292 case DK_LTO_DISCARD:
2293 return parseDirectiveLTODiscard();
2294 case DK_MEMTAG:
2295 return parseDirectiveSymbolAttribute(MCSA_Memtag);
2296 }
2297
2298 return Error(IDLoc, "unknown directive");
2299 }
2300
2301 // __asm _emit or __asm __emit
2302 if (ParsingMSInlineAsm && (IDVal == "_emit" || IDVal == "__emit" ||
2303 IDVal == "_EMIT" || IDVal == "__EMIT"))
2304 return parseDirectiveMSEmit(IDLoc, Info, IDVal.size());
2305
2306 // __asm align
2307 if (ParsingMSInlineAsm && (IDVal == "align" || IDVal == "ALIGN"))
2308 return parseDirectiveMSAlign(IDLoc, Info);
2309
2310 if (ParsingMSInlineAsm && (IDVal == "even" || IDVal == "EVEN"))
2311 Info.AsmRewrites->emplace_back(AOK_EVEN, IDLoc, 4);
2312 if (checkForValidSection())
2313 return true;
2314
2315 return parseAndMatchAndEmitTargetInstruction(Info, IDVal, ID, IDLoc);
2316}
2317
2318bool AsmParser::parseAndMatchAndEmitTargetInstruction(ParseStatementInfo &Info,
2319 StringRef IDVal,
2320 AsmToken ID,
2321 SMLoc IDLoc) {
2322 // Canonicalize the opcode to lower case.
2323 std::string OpcodeStr = IDVal.lower();
2324 ParseInstructionInfo IInfo(Info.AsmRewrites);
2325 bool ParseHadError = getTargetParser().ParseInstruction(IInfo, OpcodeStr, ID,
2326 Info.ParsedOperands);
2327 Info.ParseError = ParseHadError;
2328
2329 // Dump the parsed representation, if requested.
2330 if (getShowParsedOperands()) {
2331 SmallString<256> Str;
2333 OS << "parsed instruction: [";
2334 for (unsigned i = 0; i != Info.ParsedOperands.size(); ++i) {
2335 if (i != 0)
2336 OS << ", ";
2337 Info.ParsedOperands[i]->print(OS);
2338 }
2339 OS << "]";
2340
2341 printMessage(IDLoc, SourceMgr::DK_Note, OS.str());
2342 }
2343
2344 // Fail even if ParseInstruction erroneously returns false.
2345 if (hasPendingError() || ParseHadError)
2346 return true;
2347
2348 // If we are generating dwarf for the current section then generate a .loc
2349 // directive for the instruction.
2350 if (!ParseHadError && enabledGenDwarfForAssembly() &&
2351 getContext().getGenDwarfSectionSyms().count(
2352 getStreamer().getCurrentSectionOnly())) {
2353 unsigned Line;
2354 if (ActiveMacros.empty())
2355 Line = SrcMgr.FindLineNumber(IDLoc, CurBuffer);
2356 else
2357 Line = SrcMgr.FindLineNumber(ActiveMacros.front()->InstantiationLoc,
2358 ActiveMacros.front()->ExitBuffer);
2359
2360 // If we previously parsed a cpp hash file line comment then make sure the
2361 // current Dwarf File is for the CppHashFilename if not then emit the
2362 // Dwarf File table for it and adjust the line number for the .loc.
2363 if (!CppHashInfo.Filename.empty()) {
2364 unsigned FileNumber = getStreamer().emitDwarfFileDirective(
2365 0, StringRef(), CppHashInfo.Filename);
2366 getContext().setGenDwarfFileNumber(FileNumber);
2367
2368 unsigned CppHashLocLineNo =
2369 SrcMgr.FindLineNumber(CppHashInfo.Loc, CppHashInfo.Buf);
2370 Line = CppHashInfo.LineNumber - 1 + (Line - CppHashLocLineNo);
2371 }
2372
2373 getStreamer().emitDwarfLocDirective(
2374 getContext().getGenDwarfFileNumber(), Line, 0,
2376 StringRef());
2377 }
2378
2379 // If parsing succeeded, match the instruction.
2380 if (!ParseHadError) {
2382 if (getTargetParser().MatchAndEmitInstruction(
2383 IDLoc, Info.Opcode, Info.ParsedOperands, Out, ErrorInfo,
2384 getTargetParser().isParsingMSInlineAsm()))
2385 return true;
2386 }
2387 return false;
2388}
2389
2390// Parse and erase curly braces marking block start/end
2391bool
2392AsmParser::parseCurlyBlockScope(SmallVectorImpl<AsmRewrite> &AsmStrRewrites) {
2393 // Identify curly brace marking block start/end
2394 if (Lexer.isNot(AsmToken::LCurly) && Lexer.isNot(AsmToken::RCurly))
2395 return false;
2396
2397 SMLoc StartLoc = Lexer.getLoc();
2398 Lex(); // Eat the brace
2399 if (Lexer.is(AsmToken::EndOfStatement))
2400 Lex(); // Eat EndOfStatement following the brace
2401
2402 // Erase the block start/end brace from the output asm string
2403 AsmStrRewrites.emplace_back(AOK_Skip, StartLoc, Lexer.getLoc().getPointer() -
2404 StartLoc.getPointer());
2405 return true;
2406}
2407
2408/// parseCppHashLineFilenameComment as this:
2409/// ::= # number "filename"
2410bool AsmParser::parseCppHashLineFilenameComment(SMLoc L, bool SaveLocInfo) {
2411 Lex(); // Eat the hash token.
2412 // Lexer only ever emits HashDirective if it fully formed if it's
2413 // done the checking already so this is an internal error.
2414 assert(getTok().is(AsmToken::Integer) &&
2415 "Lexing Cpp line comment: Expected Integer");
2416 int64_t LineNumber = getTok().getIntVal();
2417 Lex();
2418 assert(getTok().is(AsmToken::String) &&
2419 "Lexing Cpp line comment: Expected String");
2420 StringRef Filename = getTok().getString();
2421 Lex();
2422
2423 if (!SaveLocInfo)
2424 return false;
2425
2426 // Get rid of the enclosing quotes.
2427 Filename = Filename.substr(1, Filename.size() - 2);
2428
2429 // Save the SMLoc, Filename and LineNumber for later use by diagnostics
2430 // and possibly DWARF file info.
2431 CppHashInfo.Loc = L;
2432 CppHashInfo.Filename = Filename;
2433 CppHashInfo.LineNumber = LineNumber;
2434 CppHashInfo.Buf = CurBuffer;
2435 if (FirstCppHashFilename.empty())
2436 FirstCppHashFilename = Filename;
2437 return false;
2438}
2439
2440/// will use the last parsed cpp hash line filename comment
2441/// for the Filename and LineNo if any in the diagnostic.
2442void AsmParser::DiagHandler(const SMDiagnostic &Diag, void *Context) {
2443 auto *Parser = static_cast<AsmParser *>(Context);
2444 raw_ostream &OS = errs();
2445
2446 const SourceMgr &DiagSrcMgr = *Diag.getSourceMgr();
2447 SMLoc DiagLoc = Diag.getLoc();
2448 unsigned DiagBuf = DiagSrcMgr.FindBufferContainingLoc(DiagLoc);
2449 unsigned CppHashBuf =
2450 Parser->SrcMgr.FindBufferContainingLoc(Parser->CppHashInfo.Loc);
2451
2452 // Like SourceMgr::printMessage() we need to print the include stack if any
2453 // before printing the message.
2454 unsigned DiagCurBuffer = DiagSrcMgr.FindBufferContainingLoc(DiagLoc);
2455 if (!Parser->SavedDiagHandler && DiagCurBuffer &&
2456 DiagCurBuffer != DiagSrcMgr.getMainFileID()) {
2457 SMLoc ParentIncludeLoc = DiagSrcMgr.getParentIncludeLoc(DiagCurBuffer);
2458 DiagSrcMgr.PrintIncludeStack(ParentIncludeLoc, OS);
2459 }
2460
2461 // If we have not parsed a cpp hash line filename comment or the source
2462 // manager changed or buffer changed (like in a nested include) then just
2463 // print the normal diagnostic using its Filename and LineNo.
2464 if (!Parser->CppHashInfo.LineNumber || DiagBuf != CppHashBuf) {
2465 if (Parser->SavedDiagHandler)
2466 Parser->SavedDiagHandler(Diag, Parser->SavedDiagContext);
2467 else
2468 Parser->getContext().diagnose(Diag);
2469 return;
2470 }
2471
2472 // Use the CppHashFilename and calculate a line number based on the
2473 // CppHashInfo.Loc and CppHashInfo.LineNumber relative to this Diag's SMLoc
2474 // for the diagnostic.
2475 const std::string &Filename = std::string(Parser->CppHashInfo.Filename);
2476
2477 int DiagLocLineNo = DiagSrcMgr.FindLineNumber(DiagLoc, DiagBuf);
2478 int CppHashLocLineNo =
2479 Parser->SrcMgr.FindLineNumber(Parser->CppHashInfo.Loc, CppHashBuf);
2480 int LineNo =
2481 Parser->CppHashInfo.LineNumber - 1 + (DiagLocLineNo - CppHashLocLineNo);
2482
2483 SMDiagnostic NewDiag(*Diag.getSourceMgr(), Diag.getLoc(), Filename, LineNo,
2484 Diag.getColumnNo(), Diag.getKind(), Diag.getMessage(),
2485 Diag.getLineContents(), Diag.getRanges());
2486
2487 if (Parser->SavedDiagHandler)
2488 Parser->SavedDiagHandler(Diag, Parser->SavedDiagContext);
2489 else
2490 Parser->getContext().diagnose(NewDiag);
2491}
2492
2493// FIXME: This is mostly duplicated from the function in AsmLexer.cpp. The
2494// difference being that that function accepts '@' as part of identifiers and
2495// we can't do that. AsmLexer.cpp should probably be changed to handle
2496// '@' as a special case when needed.
2497static bool isIdentifierChar(char c) {
2498 return isalnum(static_cast<unsigned char>(c)) || c == '_' || c == '$' ||
2499 c == '.';
2500}
2501
2502bool AsmParser::expandMacro(raw_svector_ostream &OS, StringRef Body,
2505 bool EnableAtPseudoVariable, SMLoc L) {
2506 unsigned NParameters = Parameters.size();
2507 bool HasVararg = NParameters ? Parameters.back().Vararg : false;
2508 if ((!IsDarwin || NParameters != 0) && NParameters != A.size())
2509 return Error(L, "Wrong number of arguments");
2510
2511 // A macro without parameters is handled differently on Darwin:
2512 // gas accepts no arguments and does no substitutions
2513 while (!Body.empty()) {
2514 // Scan for the next substitution.
2515 std::size_t End = Body.size(), Pos = 0;
2516 for (; Pos != End; ++Pos) {
2517 // Check for a substitution or escape.
2518 if (IsDarwin && !NParameters) {
2519 // This macro has no parameters, look for $0, $1, etc.
2520 if (Body[Pos] != '$' || Pos + 1 == End)
2521 continue;
2522
2523 char Next = Body[Pos + 1];
2524 if (Next == '$' || Next == 'n' ||
2525 isdigit(static_cast<unsigned char>(Next)))
2526 break;
2527 } else {
2528 // This macro has parameters, look for \foo, \bar, etc.
2529 if (Body[Pos] == '\\' && Pos + 1 != End)
2530 break;
2531 }
2532 }
2533
2534 // Add the prefix.
2535 OS << Body.slice(0, Pos);
2536
2537 // Check if we reached the end.
2538 if (Pos == End)
2539 break;
2540
2541 if (IsDarwin && !NParameters) {
2542 switch (Body[Pos + 1]) {
2543 // $$ => $
2544 case '$':
2545 OS << '$';
2546 break;
2547
2548 // $n => number of arguments
2549 case 'n':
2550 OS << A.size();
2551 break;
2552
2553 // $[0-9] => argument
2554 default: {
2555 // Missing arguments are ignored.
2556 unsigned Index = Body[Pos + 1] - '0';
2557 if (Index >= A.size())
2558 break;
2559
2560 // Otherwise substitute with the token values, with spaces eliminated.
2561 for (const AsmToken &Token : A[Index])
2562 OS << Token.getString();
2563 break;
2564 }
2565 }
2566 Pos += 2;
2567 } else {
2568 unsigned I = Pos + 1;
2569
2570 // Check for the \@ pseudo-variable.
2571 if (EnableAtPseudoVariable && Body[I] == '@' && I + 1 != End)
2572 ++I;
2573 else
2574 while (isIdentifierChar(Body[I]) && I + 1 != End)
2575 ++I;
2576
2577 const char *Begin = Body.data() + Pos + 1;
2578 StringRef Argument(Begin, I - (Pos + 1));
2579 unsigned Index = 0;
2580
2581 if (Argument == "@") {
2582 OS << NumOfMacroInstantiations;
2583 Pos += 2;
2584 } else {
2585 for (; Index < NParameters; ++Index)
2586 if (Parameters[Index].Name == Argument)
2587 break;
2588
2589 if (Index == NParameters) {
2590 if (Body[Pos + 1] == '(' && Body[Pos + 2] == ')')
2591 Pos += 3;
2592 else {
2593 OS << '\\' << Argument;
2594 Pos = I;
2595 }
2596 } else {
2597 bool VarargParameter = HasVararg && Index == (NParameters - 1);
2598 for (const AsmToken &Token : A[Index])
2599 // For altmacro mode, you can write '%expr'.
2600 // The prefix '%' evaluates the expression 'expr'
2601 // and uses the result as a string (e.g. replace %(1+2) with the
2602 // string "3").
2603 // Here, we identify the integer token which is the result of the
2604 // absolute expression evaluation and replace it with its string
2605 // representation.
2606 if (AltMacroMode && Token.getString().front() == '%' &&
2607 Token.is(AsmToken::Integer))
2608 // Emit an integer value to the buffer.
2609 OS << Token.getIntVal();
2610 // Only Token that was validated as a string and begins with '<'
2611 // is considered altMacroString!!!
2612 else if (AltMacroMode && Token.getString().front() == '<' &&
2613 Token.is(AsmToken::String)) {
2614 OS << angleBracketString(Token.getStringContents());
2615 }
2616 // We expect no quotes around the string's contents when
2617 // parsing for varargs.
2618 else if (Token.isNot(AsmToken::String) || VarargParameter)
2619 OS << Token.getString();
2620 else
2621 OS << Token.getStringContents();
2622
2623 Pos += 1 + Argument.size();
2624 }
2625 }
2626 }
2627 // Update the scan point.
2628 Body = Body.substr(Pos);
2629 }
2630
2631 return false;
2632}
2633
2635 switch (kind) {
2636 default:
2637 return false;
2638 case AsmToken::Plus:
2639 case AsmToken::Minus:
2640 case AsmToken::Tilde:
2641 case AsmToken::Slash:
2642 case AsmToken::Star:
2643 case AsmToken::Dot:
2644 case AsmToken::Equal:
2646 case AsmToken::Pipe:
2647 case AsmToken::PipePipe:
2648 case AsmToken::Caret:
2649 case AsmToken::Amp:
2650 case AsmToken::AmpAmp:
2651 case AsmToken::Exclaim:
2653 case AsmToken::Less:
2655 case AsmToken::LessLess:
2657 case AsmToken::Greater:
2660 return true;
2661 }
2662}
2663
2664namespace {
2665
2666class AsmLexerSkipSpaceRAII {
2667public:
2668 AsmLexerSkipSpaceRAII(AsmLexer &Lexer, bool SkipSpace) : Lexer(Lexer) {
2669 Lexer.setSkipSpace(SkipSpace);
2670 }
2671
2672 ~AsmLexerSkipSpaceRAII() {
2673 Lexer.setSkipSpace(true);
2674 }
2675
2676private:
2677 AsmLexer &Lexer;
2678};
2679
2680} // end anonymous namespace
2681
2682bool AsmParser::parseMacroArgument(MCAsmMacroArgument &MA, bool Vararg) {
2683
2684 if (Vararg) {
2685 if (Lexer.isNot(AsmToken::EndOfStatement)) {
2686 StringRef Str = parseStringToEndOfStatement();
2687 MA.emplace_back(AsmToken::String, Str);
2688 }
2689 return false;
2690 }
2691
2692 unsigned ParenLevel = 0;
2693
2694 // Darwin doesn't use spaces to delmit arguments.
2695 AsmLexerSkipSpaceRAII ScopedSkipSpace(Lexer, IsDarwin);
2696
2697 bool SpaceEaten;
2698
2699 while (true) {
2700 SpaceEaten = false;
2701 if (Lexer.is(AsmToken::Eof) || Lexer.is(AsmToken::Equal))
2702 return TokError("unexpected token in macro instantiation");
2703
2704 if (ParenLevel == 0) {
2705
2706 if (Lexer.is(AsmToken::Comma))
2707 break;
2708
2709 if (Lexer.is(AsmToken::Space)) {
2710 SpaceEaten = true;
2711 Lexer.Lex(); // Eat spaces
2712 }
2713
2714 // Spaces can delimit parameters, but could also be part an expression.
2715 // If the token after a space is an operator, add the token and the next
2716 // one into this argument
2717 if (!IsDarwin) {
2718 if (isOperator(Lexer.getKind())) {
2719 MA.push_back(getTok());
2720 Lexer.Lex();
2721
2722 // Whitespace after an operator can be ignored.
2723 if (Lexer.is(AsmToken::Space))
2724 Lexer.Lex();
2725
2726 continue;
2727 }
2728 }
2729 if (SpaceEaten)
2730 break;
2731 }
2732
2733 // handleMacroEntry relies on not advancing the lexer here
2734 // to be able to fill in the remaining default parameter values
2735 if (Lexer.is(AsmToken::EndOfStatement))
2736 break;
2737
2738 // Adjust the current parentheses level.
2739 if (Lexer.is(AsmToken::LParen))
2740 ++ParenLevel;
2741 else if (Lexer.is(AsmToken::RParen) && ParenLevel)
2742 --ParenLevel;
2743
2744 // Append the token to the current argument list.
2745 MA.push_back(getTok());
2746 Lexer.Lex();
2747 }
2748
2749 if (ParenLevel != 0)
2750 return TokError("unbalanced parentheses in macro argument");
2751 return false;
2752}
2753
2754// Parse the macro instantiation arguments.
2755bool AsmParser::parseMacroArguments(const MCAsmMacro *M,
2756 MCAsmMacroArguments &A) {
2757 const unsigned NParameters = M ? M->Parameters.size() : 0;
2758 bool NamedParametersFound = false;
2759 SmallVector<SMLoc, 4> FALocs;
2760
2761 A.resize(NParameters);
2762 FALocs.resize(NParameters);
2763
2764 // Parse two kinds of macro invocations:
2765 // - macros defined without any parameters accept an arbitrary number of them
2766 // - macros defined with parameters accept at most that many of them
2767 bool HasVararg = NParameters ? M->Parameters.back().Vararg : false;
2768 for (unsigned Parameter = 0; !NParameters || Parameter < NParameters;
2769 ++Parameter) {
2770 SMLoc IDLoc = Lexer.getLoc();
2772
2773 if (Lexer.is(AsmToken::Identifier) && Lexer.peekTok().is(AsmToken::Equal)) {
2774 if (parseIdentifier(FA.Name))
2775 return Error(IDLoc, "invalid argument identifier for formal argument");
2776
2777 if (Lexer.isNot(AsmToken::Equal))
2778 return TokError("expected '=' after formal parameter identifier");
2779
2780 Lex();
2781
2782 NamedParametersFound = true;
2783 }
2784 bool Vararg = HasVararg && Parameter == (NParameters - 1);
2785
2786 if (NamedParametersFound && FA.Name.empty())
2787 return Error(IDLoc, "cannot mix positional and keyword arguments");
2788
2789 SMLoc StrLoc = Lexer.getLoc();
2790 SMLoc EndLoc;
2791 if (AltMacroMode && Lexer.is(AsmToken::Percent)) {
2792 const MCExpr *AbsoluteExp;
2793 int64_t Value;
2794 /// Eat '%'
2795 Lex();
2796 if (parseExpression(AbsoluteExp, EndLoc))
2797 return false;
2798 if (!AbsoluteExp->evaluateAsAbsolute(Value,
2799 getStreamer().getAssemblerPtr()))
2800 return Error(StrLoc, "expected absolute expression");
2801 const char *StrChar = StrLoc.getPointer();
2802 const char *EndChar = EndLoc.getPointer();
2803 AsmToken newToken(AsmToken::Integer,
2804 StringRef(StrChar, EndChar - StrChar), Value);
2805 FA.Value.push_back(newToken);
2806 } else if (AltMacroMode && Lexer.is(AsmToken::Less) &&
2807 isAngleBracketString(StrLoc, EndLoc)) {
2808 const char *StrChar = StrLoc.getPointer();
2809 const char *EndChar = EndLoc.getPointer();
2810 jumpToLoc(EndLoc, CurBuffer);
2811 /// Eat from '<' to '>'
2812 Lex();
2813 AsmToken newToken(AsmToken::String,
2814 StringRef(StrChar, EndChar - StrChar));
2815 FA.Value.push_back(newToken);
2816 } else if(parseMacroArgument(FA.Value, Vararg))
2817 return true;
2818
2819 unsigned PI = Parameter;
2820 if (!FA.Name.empty()) {
2821 unsigned FAI = 0;
2822 for (FAI = 0; FAI < NParameters; ++FAI)
2823 if (M->Parameters[FAI].Name == FA.Name)
2824 break;
2825
2826 if (FAI >= NParameters) {
2827 assert(M && "expected macro to be defined");
2828 return Error(IDLoc, "parameter named '" + FA.Name +
2829 "' does not exist for macro '" + M->Name + "'");
2830 }
2831 PI = FAI;
2832 }
2833
2834 if (!FA.Value.empty()) {
2835 if (A.size() <= PI)
2836 A.resize(PI + 1);
2837 A[PI] = FA.Value;
2838
2839 if (FALocs.size() <= PI)
2840 FALocs.resize(PI + 1);
2841
2842 FALocs[PI] = Lexer.getLoc();
2843 }
2844
2845 // At the end of the statement, fill in remaining arguments that have
2846 // default values. If there aren't any, then the next argument is
2847 // required but missing
2848 if (Lexer.is(AsmToken::EndOfStatement)) {
2849 bool Failure = false;
2850 for (unsigned FAI = 0; FAI < NParameters; ++FAI) {
2851 if (A[FAI].empty()) {
2852 if (M->Parameters[FAI].Required) {
2853 Error(FALocs[FAI].isValid() ? FALocs[FAI] : Lexer.getLoc(),
2854 "missing value for required parameter "
2855 "'" + M->Parameters[FAI].Name + "' in macro '" + M->Name + "'");
2856 Failure = true;
2857 }
2858
2859 if (!M->Parameters[FAI].Value.empty())
2860 A[FAI] = M->Parameters[FAI].Value;
2861 }
2862 }
2863 return Failure;
2864 }
2865
2866 if (Lexer.is(AsmToken::Comma))
2867 Lex();
2868 }
2869
2870 return TokError("too many positional arguments");
2871}
2872
2873bool AsmParser::handleMacroEntry(const MCAsmMacro *M, SMLoc NameLoc) {
2874 // Arbitrarily limit macro nesting depth (default matches 'as'). We can
2875 // eliminate this, although we should protect against infinite loops.
2876 unsigned MaxNestingDepth = AsmMacroMaxNestingDepth;
2877 if (ActiveMacros.size() == MaxNestingDepth) {
2878 std::ostringstream MaxNestingDepthError;
2879 MaxNestingDepthError << "macros cannot be nested more than "
2880 << MaxNestingDepth << " levels deep."
2881 << " Use -asm-macro-max-nesting-depth to increase "
2882 "this limit.";
2883 return TokError(MaxNestingDepthError.str());
2884 }
2885
2886 MCAsmMacroArguments A;
2887 if (parseMacroArguments(M, A))
2888 return true;
2889
2890 // Macro instantiation is lexical, unfortunately. We construct a new buffer
2891 // to hold the macro body with substitutions.
2892 SmallString<256> Buf;
2893 StringRef Body = M->Body;
2895
2896 if (expandMacro(OS, Body, M->Parameters, A, true, getTok().getLoc()))
2897 return true;
2898
2899 // We include the .endmacro in the buffer as our cue to exit the macro
2900 // instantiation.
2901 OS << ".endmacro\n";
2902
2903 std::unique_ptr<MemoryBuffer> Instantiation =
2904 MemoryBuffer::getMemBufferCopy(OS.str(), "<instantiation>");
2905
2906 // Create the macro instantiation object and add to the current macro
2907 // instantiation stack.
2908 MacroInstantiation *MI = new MacroInstantiation{
2909 NameLoc, CurBuffer, getTok().getLoc(), TheCondStack.size()};
2910 ActiveMacros.push_back(MI);
2911
2912 ++NumOfMacroInstantiations;
2913
2914 // Jump to the macro instantiation and prime the lexer.
2915 CurBuffer = SrcMgr.AddNewSourceBuffer(std::move(Instantiation), SMLoc());
2916 Lexer.setBuffer(SrcMgr.getMemoryBuffer(CurBuffer)->getBuffer());
2917 Lex();
2918
2919 return false;
2920}
2921
2922void AsmParser::handleMacroExit() {
2923 // Jump to the EndOfStatement we should return to, and consume it.
2924 jumpToLoc(ActiveMacros.back()->ExitLoc, ActiveMacros.back()->ExitBuffer);
2925 Lex();
2926
2927 // Pop the instantiation entry.
2928 delete ActiveMacros.back();
2929 ActiveMacros.pop_back();
2930}
2931
2932bool AsmParser::parseAssignment(StringRef Name, AssignmentKind Kind) {
2933 MCSymbol *Sym;
2934 const MCExpr *Value;
2935 SMLoc ExprLoc = getTok().getLoc();
2936 bool AllowRedef =
2937 Kind == AssignmentKind::Set || Kind == AssignmentKind::Equal;
2938 if (MCParserUtils::parseAssignmentExpression(Name, AllowRedef, *this, Sym,
2939 Value))
2940 return true;
2941
2942 if (!Sym) {
2943 // In the case where we parse an expression starting with a '.', we will
2944 // not generate an error, nor will we create a symbol. In this case we
2945 // should just return out.
2946 return false;
2947 }
2948
2949 if (discardLTOSymbol(Name))
2950 return false;
2951
2952 // Do the assignment.
2953 switch (Kind) {
2954 case AssignmentKind::Equal:
2955 Out.emitAssignment(Sym, Value);
2956 break;
2957 case AssignmentKind::Set:
2958 case AssignmentKind::Equiv:
2959 Out.emitAssignment(Sym, Value);
2961 break;
2962 case AssignmentKind::LTOSetConditional:
2963 if (Value->getKind() != MCExpr::SymbolRef)
2964 return Error(ExprLoc, "expected identifier");
2965
2967 break;
2968 }
2969
2970 return false;
2971}
2972
2973/// parseIdentifier:
2974/// ::= identifier
2975/// ::= string
2976bool AsmParser::parseIdentifier(StringRef &Res) {
2977 // The assembler has relaxed rules for accepting identifiers, in particular we
2978 // allow things like '.globl $foo' and '.def @feat.00', which would normally be
2979 // separate tokens. At this level, we have already lexed so we cannot (currently)
2980 // handle this as a context dependent token, instead we detect adjacent tokens
2981 // and return the combined identifier.
2982 if (Lexer.is(AsmToken::Dollar) || Lexer.is(AsmToken::At)) {
2983 SMLoc PrefixLoc = getLexer().getLoc();
2984
2985 // Consume the prefix character, and check for a following identifier.
2986
2987 AsmToken Buf[1];
2988 Lexer.peekTokens(Buf, false);
2989
2990 if (Buf[0].isNot(AsmToken::Identifier) && Buf[0].isNot(AsmToken::Integer))
2991 return true;
2992
2993 // We have a '$' or '@' followed by an identifier or integer token, make
2994 // sure they are adjacent.
2995 if (PrefixLoc.getPointer() + 1 != Buf[0].getLoc().getPointer())
2996 return true;
2997
2998 // eat $ or @
2999 Lexer.Lex(); // Lexer's Lex guarantees consecutive token.
3000 // Construct the joined identifier and consume the token.
3001 Res = StringRef(PrefixLoc.getPointer(), getTok().getString().size() + 1);
3002 Lex(); // Parser Lex to maintain invariants.
3003 return false;
3004 }
3005
3006 if (Lexer.isNot(AsmToken::Identifier) && Lexer.isNot(AsmToken::String))
3007 return true;
3008
3009 Res = getTok().getIdentifier();
3010
3011 Lex(); // Consume the identifier token.
3012
3013 return false;
3014}
3015
3016/// parseDirectiveSet:
3017/// ::= .equ identifier ',' expression
3018/// ::= .equiv identifier ',' expression
3019/// ::= .set identifier ',' expression
3020/// ::= .lto_set_conditional identifier ',' expression
3021bool AsmParser::parseDirectiveSet(StringRef IDVal, AssignmentKind Kind) {
3023 if (check(parseIdentifier(Name), "expected identifier") || parseComma() ||
3024 parseAssignment(Name, Kind))
3025 return true;
3026 return false;
3027}
3028
3029bool AsmParser::parseEscapedString(std::string &Data) {
3030 if (check(getTok().isNot(AsmToken::String), "expected string"))
3031 return true;
3032
3033 Data = "";
3034 StringRef Str = getTok().getStringContents();
3035 for (unsigned i = 0, e = Str.size(); i != e; ++i) {
3036 if (Str[i] != '\\') {
3037 Data += Str[i];
3038 continue;
3039 }
3040
3041 // Recognize escaped characters. Note that this escape semantics currently
3042 // loosely follows Darwin 'as'.
3043 ++i;
3044 if (i == e)
3045 return TokError("unexpected backslash at end of string");
3046
3047 // Recognize hex sequences similarly to GNU 'as'.
3048 if (Str[i] == 'x' || Str[i] == 'X') {
3049 size_t length = Str.size();
3050 if (i + 1 >= length || !isHexDigit(Str[i + 1]))
3051 return TokError("invalid hexadecimal escape sequence");
3052
3053 // Consume hex characters. GNU 'as' reads all hexadecimal characters and
3054 // then truncates to the lower 16 bits. Seems reasonable.
3055 unsigned Value = 0;
3056 while (i + 1 < length && isHexDigit(Str[i + 1]))
3057 Value = Value * 16 + hexDigitValue(Str[++i]);
3058
3059 Data += (unsigned char)(Value & 0xFF);
3060 continue;
3061 }
3062
3063 // Recognize octal sequences.
3064 if ((unsigned)(Str[i] - '0') <= 7) {
3065 // Consume up to three octal characters.
3066 unsigned Value = Str[i] - '0';
3067
3068 if (i + 1 != e && ((unsigned)(Str[i + 1] - '0')) <= 7) {
3069 ++i;
3070 Value = Value * 8 + (Str[i] - '0');
3071
3072 if (i + 1 != e && ((unsigned)(Str[i + 1] - '0')) <= 7) {
3073 ++i;
3074 Value = Value * 8 + (Str[i] - '0');
3075 }
3076 }
3077
3078 if (Value > 255)
3079 return TokError("invalid octal escape sequence (out of range)");
3080
3081 Data += (unsigned char)Value;
3082 continue;
3083 }
3084
3085 // Otherwise recognize individual escapes.
3086 switch (Str[i]) {
3087 default:
3088 // Just reject invalid escape sequences for now.
3089 return TokError("invalid escape sequence (unrecognized character)");
3090
3091 case 'b': Data += '\b'; break;
3092 case 'f': Data += '\f'; break;
3093 case 'n': Data += '\n'; break;
3094 case 'r': Data += '\r'; break;
3095 case 't': Data += '\t'; break;
3096 case '"': Data += '"'; break;
3097 case '\\': Data += '\\'; break;
3098 }
3099 }
3100
3101 Lex();
3102 return false;
3103}
3104
3105bool AsmParser::parseAngleBracketString(std::string &Data) {
3106 SMLoc EndLoc, StartLoc = getTok().getLoc();
3107 if (isAngleBracketString(StartLoc, EndLoc)) {
3108 const char *StartChar = StartLoc.getPointer() + 1;
3109 const char *EndChar = EndLoc.getPointer() - 1;
3110 jumpToLoc(EndLoc, CurBuffer);
3111 /// Eat from '<' to '>'
3112 Lex();
3113
3114 Data = angleBracketString(StringRef(StartChar, EndChar - StartChar));
3115 return false;
3116 }
3117 return true;
3118}
3119
3120/// parseDirectiveAscii:
3121// ::= .ascii [ "string"+ ( , "string"+ )* ]
3122/// ::= ( .asciz | .string ) [ "string" ( , "string" )* ]
3123bool AsmParser::parseDirectiveAscii(StringRef IDVal, bool ZeroTerminated) {
3124 auto parseOp = [&]() -> bool {
3125 std::string Data;
3126 if (checkForValidSection())
3127 return true;
3128 // Only support spaces as separators for .ascii directive for now. See the
3129 // discusssion at https://reviews.llvm.org/D91460 for more details.
3130 do {
3131 if (parseEscapedString(Data))
3132 return true;
3133 getStreamer().emitBytes(Data);
3134 } while (!ZeroTerminated && getTok().is(AsmToken::String));
3135 if (ZeroTerminated)
3136 getStreamer().emitBytes(StringRef("\0", 1));
3137 return false;
3138 };
3139
3140 return parseMany(parseOp);
3141}
3142
3143/// parseDirectiveReloc
3144/// ::= .reloc expression , identifier [ , expression ]
3145bool AsmParser::parseDirectiveReloc(SMLoc DirectiveLoc) {
3146 const MCExpr *Offset;
3147 const MCExpr *Expr = nullptr;
3148 SMLoc OffsetLoc = Lexer.getTok().getLoc();
3149
3150 if (parseExpression(Offset))
3151 return true;
3152 if (parseComma() ||
3153 check(getTok().isNot(AsmToken::Identifier), "expected relocation name"))
3154 return true;
3155
3156 SMLoc NameLoc = Lexer.getTok().getLoc();
3157 StringRef Name = Lexer.getTok().getIdentifier();
3158 Lex();
3159
3160 if (Lexer.is(AsmToken::Comma)) {
3161 Lex();
3162 SMLoc ExprLoc = Lexer.getLoc();
3163 if (parseExpression(Expr))
3164 return true;
3165
3166 MCValue Value;
3167 if (!Expr->evaluateAsRelocatable(Value, nullptr, nullptr))
3168 return Error(ExprLoc, "expression must be relocatable");
3169 }
3170
3171 if (parseEOL())
3172 return true;
3173
3174 const MCTargetAsmParser &MCT = getTargetParser();
3175 const MCSubtargetInfo &STI = MCT.getSTI();
3176 if (std::optional<std::pair<bool, std::string>> Err =
3177 getStreamer().emitRelocDirective(*Offset, Name, Expr, DirectiveLoc,
3178 STI))
3179 return Error(Err->first ? NameLoc : OffsetLoc, Err->second);
3180
3181 return false;
3182}
3183
3184/// parseDirectiveValue
3185/// ::= (.byte | .short | ... ) [ expression (, expression)* ]
3186bool AsmParser::parseDirectiveValue(StringRef IDVal, unsigned Size) {
3187 auto parseOp = [&]() -> bool {
3188 const MCExpr *Value;
3189 SMLoc ExprLoc = getLexer().getLoc();
3190 if (checkForValidSection() || parseExpression(Value))
3191 return true;
3192 // Special case constant expressions to match code generator.
3193 if (const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Value)) {
3194 assert(Size <= 8 && "Invalid size");
3195 uint64_t IntValue = MCE->getValue();
3196 if (!isUIntN(8 * Size, IntValue) && !isIntN(8 * Size, IntValue))
3197 return Error(ExprLoc, "out of range literal value");
3198 getStreamer().emitIntValue(IntValue, Size);
3199 } else
3200 getStreamer().emitValue(Value, Size, ExprLoc);
3201 return false;
3202 };
3203
3204 return parseMany(parseOp);
3205}
3206
3207static bool parseHexOcta(AsmParser &Asm, uint64_t &hi, uint64_t &lo) {
3208 if (Asm.getTok().isNot(AsmToken::Integer) &&
3209 Asm.getTok().isNot(AsmToken::BigNum))
3210 return Asm.TokError("unknown token in expression");
3211 SMLoc ExprLoc = Asm.getTok().getLoc();
3212 APInt IntValue = Asm.getTok().getAPIntVal();
3213 Asm.Lex();
3214 if (!IntValue.isIntN(128))
3215 return Asm.Error(ExprLoc, "out of range literal value");
3216 if (!IntValue.isIntN(64)) {
3217 hi = IntValue.getHiBits(IntValue.getBitWidth() - 64).getZExtValue();
3218 lo = IntValue.getLoBits(64).getZExtValue();
3219 } else {
3220 hi = 0;
3221 lo = IntValue.getZExtValue();
3222 }
3223 return false;
3224}
3225
3226/// ParseDirectiveOctaValue
3227/// ::= .octa [ hexconstant (, hexconstant)* ]
3228
3229bool AsmParser::parseDirectiveOctaValue(StringRef IDVal) {
3230 auto parseOp = [&]() -> bool {
3231 if (checkForValidSection())
3232 return true;
3233 uint64_t hi, lo;
3234 if (parseHexOcta(*this, hi, lo))
3235 return true;
3236 if (MAI.isLittleEndian()) {
3237 getStreamer().emitInt64(lo);
3238 getStreamer().emitInt64(hi);
3239 } else {
3240 getStreamer().emitInt64(hi);
3241 getStreamer().emitInt64(lo);
3242 }
3243 return false;
3244 };
3245
3246 return parseMany(parseOp);
3247}
3248
3249bool AsmParser::parseRealValue(const fltSemantics &Semantics, APInt &Res) {
3250 // We don't truly support arithmetic on floating point expressions, so we
3251 // have to manually parse unary prefixes.
3252 bool IsNeg = false;
3253 if (getLexer().is(AsmToken::Minus)) {
3254 Lexer.Lex();
3255 IsNeg = true;
3256 } else if (getLexer().is(AsmToken::Plus))
3257 Lexer.Lex();
3258
3259 if (Lexer.is(AsmToken::Error))
3260 return TokError(Lexer.getErr());
3261 if (Lexer.isNot(AsmToken::Integer) && Lexer.isNot(AsmToken::Real) &&
3263 return TokError("unexpected token in directive");
3264
3265 // Convert to an APFloat.
3266 APFloat Value(Semantics);
3267 StringRef IDVal = getTok().getString();
3268 if (getLexer().is(AsmToken::Identifier)) {
3269 if (!IDVal.compare_insensitive("infinity") ||
3270 !IDVal.compare_insensitive("inf"))
3271 Value = APFloat::getInf(Semantics);
3272 else if (!IDVal.compare_insensitive("nan"))
3273 Value = APFloat::getNaN(Semantics, false, ~0);
3274 else
3275 return TokError("invalid floating point literal");
3276 } else if (errorToBool(
3277 Value.convertFromString(IDVal, APFloat::rmNearestTiesToEven)
3278 .takeError()))
3279 return TokError("invalid floating point literal");
3280 if (IsNeg)
3281 Value.changeSign();
3282
3283 // Consume the numeric token.
3284 Lex();
3285
3286 Res = Value.bitcastToAPInt();
3287
3288 return false;
3289}
3290
3291/// parseDirectiveRealValue
3292/// ::= (.single | .double) [ expression (, expression)* ]
3293bool AsmParser::parseDirectiveRealValue(StringRef IDVal,
3294 const fltSemantics &Semantics) {
3295 auto parseOp = [&]() -> bool {
3296 APInt AsInt;
3297 if (checkForValidSection() || parseRealValue(Semantics, AsInt))
3298 return true;
3299 getStreamer().emitIntValue(AsInt.getLimitedValue(),
3300 AsInt.getBitWidth() / 8);
3301 return false;
3302 };
3303
3304 return parseMany(parseOp);
3305}
3306
3307/// parseDirectiveZero
3308/// ::= .zero expression
3309bool AsmParser::parseDirectiveZero() {
3310 SMLoc NumBytesLoc = Lexer.getLoc();
3311 const MCExpr *NumBytes;
3312 if (checkForValidSection() || parseExpression(NumBytes))
3313 return true;
3314
3315 int64_t Val = 0;
3316 if (getLexer().is(AsmToken::Comma)) {
3317 Lex();
3318 if (parseAbsoluteExpression(Val))
3319 return true;
3320 }
3321
3322 if (parseEOL())
3323 return true;
3324 getStreamer().emitFill(*NumBytes, Val, NumBytesLoc);
3325
3326 return false;
3327}
3328
3329/// parseDirectiveFill
3330/// ::= .fill expression [ , expression [ , expression ] ]
3331bool AsmParser::parseDirectiveFill() {
3332 SMLoc NumValuesLoc = Lexer.getLoc();
3333 const MCExpr *NumValues;
3334 if (checkForValidSection() || parseExpression(NumValues))
3335 return true;
3336
3337 int64_t FillSize = 1;
3338 int64_t FillExpr = 0;
3339
3340 SMLoc SizeLoc, ExprLoc;
3341
3342 if (parseOptionalToken(AsmToken::Comma)) {
3343 SizeLoc = getTok().getLoc();
3344 if (parseAbsoluteExpression(FillSize))
3345 return true;
3346 if (parseOptionalToken(AsmToken::Comma)) {
3347 ExprLoc = getTok().getLoc();
3348 if (parseAbsoluteExpression(FillExpr))
3349 return true;
3350 }
3351 }
3352 if (parseEOL())
3353 return true;
3354
3355 if (FillSize < 0) {
3356 Warning(SizeLoc, "'.fill' directive with negative size has no effect");
3357 return false;
3358 }
3359 if (FillSize > 8) {
3360 Warning(SizeLoc, "'.fill' directive with size greater than 8 has been truncated to 8");
3361 FillSize = 8;
3362 }
3363
3364 if (!isUInt<32>(FillExpr) && FillSize > 4)
3365 Warning(ExprLoc, "'.fill' directive pattern has been truncated to 32-bits");
3366
3367 getStreamer().emitFill(*NumValues, FillSize, FillExpr, NumValuesLoc);
3368
3369 return false;
3370}
3371
3372/// parseDirectiveOrg
3373/// ::= .org expression [ , expression ]
3374bool AsmParser::parseDirectiveOrg() {
3375 const MCExpr *Offset;
3376 SMLoc OffsetLoc = Lexer.getLoc();
3377 if (checkForValidSection() || parseExpression(Offset))
3378 return true;
3379
3380 // Parse optional fill expression.
3381 int64_t FillExpr = 0;
3382 if (parseOptionalToken(AsmToken::Comma))
3383 if (parseAbsoluteExpression(FillExpr))
3384 return true;
3385 if (parseEOL())
3386 return true;
3387
3388 getStreamer().emitValueToOffset(Offset, FillExpr, OffsetLoc);
3389 return false;
3390}
3391
3392/// parseDirectiveAlign
3393/// ::= {.align, ...} expression [ , expression [ , expression ]]
3394bool AsmParser::parseDirectiveAlign(bool IsPow2, unsigned ValueSize) {
3395 SMLoc AlignmentLoc = getLexer().getLoc();
3396 int64_t Alignment;
3397 SMLoc MaxBytesLoc;
3398 bool HasFillExpr = false;
3399 int64_t FillExpr = 0;
3400 int64_t MaxBytesToFill = 0;
3401 SMLoc FillExprLoc;
3402
3403 auto parseAlign = [&]() -> bool {
3404 if (parseAbsoluteExpression(Alignment))
3405 return true;
3406 if (parseOptionalToken(AsmToken::Comma)) {
3407 // The fill expression can be omitted while specifying a maximum number of
3408 // alignment bytes, e.g:
3409 // .align 3,,4
3410 if (getTok().isNot(AsmToken::Comma)) {
3411 HasFillExpr = true;
3412 if (parseTokenLoc(FillExprLoc) || parseAbsoluteExpression(FillExpr))
3413 return true;
3414 }
3415 if (parseOptionalToken(AsmToken::Comma))
3416 if (parseTokenLoc(MaxBytesLoc) ||
3417 parseAbsoluteExpression(MaxBytesToFill))
3418 return true;
3419 }
3420 return parseEOL();
3421 };
3422
3423 if (checkForValidSection())
3424 return true;
3425 // Ignore empty '.p2align' directives for GNU-as compatibility
3426 if (IsPow2 && (ValueSize == 1) && getTok().is(AsmToken::EndOfStatement)) {
3427 Warning(AlignmentLoc, "p2align directive with no operand(s) is ignored");
3428 return parseEOL();
3429 }
3430 if (parseAlign())
3431 return true;
3432
3433 // Always emit an alignment here even if we thrown an error.
3434 bool ReturnVal = false;
3435
3436 // Compute alignment in bytes.
3437 if (IsPow2) {
3438 // FIXME: Diagnose overflow.
3439 if (Alignment >= 32) {
3440 ReturnVal |= Error(AlignmentLoc, "invalid alignment value");
3441 Alignment = 31;
3442 }
3443
3444 Alignment = 1ULL << Alignment;
3445 } else {
3446 // Reject alignments that aren't either a power of two or zero,
3447 // for gas compatibility. Alignment of zero is silently rounded
3448 // up to one.
3449 if (Alignment == 0)
3450 Alignment = 1;
3451 else if (!isPowerOf2_64(Alignment)) {
3452 ReturnVal |= Error(AlignmentLoc, "alignment must be a power of 2");
3453 Alignment = llvm::bit_floor<uint64_t>(Alignment);
3454 }
3455 if (!isUInt<32>(Alignment)) {
3456 ReturnVal |= Error(AlignmentLoc, "alignment must be smaller than 2**32");
3457 Alignment = 1u << 31;
3458 }
3459 }
3460
3461 if (HasFillExpr && FillExpr != 0) {
3462 MCSection *Sec = getStreamer().getCurrentSectionOnly();
3463 if (Sec && Sec->isVirtualSection()) {
3464 ReturnVal |=
3465 Warning(FillExprLoc, "ignoring non-zero fill value in " +
3466 Sec->getVirtualSectionKind() + " section '" +
3467 Sec->getName() + "'");
3468 FillExpr = 0;
3469 }
3470 }
3471
3472 // Diagnose non-sensical max bytes to align.
3473 if (MaxBytesLoc.isValid()) {
3474 if (MaxBytesToFill < 1) {
3475 ReturnVal |= Error(MaxBytesLoc,
3476 "alignment directive can never be satisfied in this "
3477 "many bytes, ignoring maximum bytes expression");
3478 MaxBytesToFill = 0;
3479 }
3480
3481 if (MaxBytesToFill >= Alignment) {
3482 Warning(MaxBytesLoc, "maximum bytes expression exceeds alignment and "
3483 "has no effect");
3484 MaxBytesToFill = 0;
3485 }
3486 }
3487
3488 // Check whether we should use optimal code alignment for this .align
3489 // directive.
3490 const MCSection *Section = getStreamer().getCurrentSectionOnly();
3491 assert(Section && "must have section to emit alignment");
3492 bool useCodeAlign = Section->useCodeAlign();
3493 if ((!HasFillExpr || Lexer.getMAI().getTextAlignFillValue() == FillExpr) &&
3494 ValueSize == 1 && useCodeAlign) {
3495 getStreamer().emitCodeAlignment(
3496 Align(Alignment), &getTargetParser().getSTI(), MaxBytesToFill);
3497 } else {
3498 // FIXME: Target specific behavior about how the "extra" bytes are filled.
3499 getStreamer().emitValueToAlignment(Align(Alignment), FillExpr, ValueSize,
3500 MaxBytesToFill);
3501 }
3502
3503 return ReturnVal;
3504}
3505
3506/// parseDirectiveFile
3507/// ::= .file filename
3508/// ::= .file number [directory] filename [md5 checksum] [source source-text]
3509bool AsmParser::parseDirectiveFile(SMLoc DirectiveLoc) {
3510 // FIXME: I'm not sure what this is.
3511 int64_t FileNumber = -1;
3512 if (getLexer().is(AsmToken::Integer)) {
3513 FileNumber = getTok().getIntVal();
3514 Lex();
3515
3516 if (FileNumber < 0)
3517 return TokError("negative file number");
3518 }
3519
3520 std::string Path;
3521
3522 // Usually the directory and filename together, otherwise just the directory.
3523 // Allow the strings to have escaped octal character sequence.
3524 if (parseEscapedString(Path))
3525 return true;
3526
3527 StringRef Directory;
3529 std::string FilenameData;
3530 if (getLexer().is(AsmToken::String)) {
3531 if (check(FileNumber == -1,
3532 "explicit path specified, but no file number") ||
3533 parseEscapedString(FilenameData))
3534 return true;
3535 Filename = FilenameData;
3536 Directory = Path;
3537 } else {
3538 Filename = Path;
3539 }
3540
3541 uint64_t MD5Hi, MD5Lo;
3542 bool HasMD5 = false;
3543
3544 std::optional<StringRef> Source;
3545 bool HasSource = false;
3546 std::string SourceString;
3547
3548 while (!parseOptionalToken(AsmToken::EndOfStatement)) {
3550 if (check(getTok().isNot(AsmToken::Identifier),
3551 "unexpected token in '.file' directive") ||
3552 parseIdentifier(Keyword))
3553 return true;
3554 if (Keyword == "md5") {
3555 HasMD5 = true;
3556 if (check(FileNumber == -1,
3557 "MD5 checksum specified, but no file number") ||
3558 parseHexOcta(*this, MD5Hi, MD5Lo))
3559 return true;
3560 } else if (Keyword == "source") {
3561 HasSource = true;
3562 if (check(FileNumber == -1,
3563 "source specified, but no file number") ||
3564 check(getTok().isNot(AsmToken::String),
3565 "unexpected token in '.file' directive") ||
3566 parseEscapedString(SourceString))
3567 return true;
3568 } else {
3569 return TokError("unexpected token in '.file' directive");
3570 }
3571 }
3572
3573 if (FileNumber == -1) {
3574 // Ignore the directive if there is no number and the target doesn't support
3575 // numberless .file directives. This allows some portability of assembler
3576 // between different object file formats.
3577 if (getContext().getAsmInfo()->hasSingleParameterDotFile())
3578 getStreamer().emitFileDirective(Filename);
3579 } else {
3580 // In case there is a -g option as well as debug info from directive .file,
3581 // we turn off the -g option, directly use the existing debug info instead.
3582 // Throw away any implicit file table for the assembler source.
3583 if (Ctx.getGenDwarfForAssembly()) {
3585 Ctx.setGenDwarfForAssembly(false);
3586 }
3587
3588 std::optional<MD5::MD5Result> CKMem;
3589 if (HasMD5) {
3590 MD5::MD5Result Sum;
3591 for (unsigned i = 0; i != 8; ++i) {
3592 Sum[i] = uint8_t(MD5Hi >> ((7 - i) * 8));
3593 Sum[i + 8] = uint8_t(MD5Lo >> ((7 - i) * 8));
3594 }
3595 CKMem = Sum;
3596 }
3597 if (HasSource) {
3598 char *SourceBuf = static_cast<char *>(Ctx.allocate(SourceString.size()));
3599 memcpy(SourceBuf, SourceString.data(), SourceString.size());
3600 Source = StringRef(SourceBuf, SourceString.size());
3601 }
3602 if (FileNumber == 0) {
3603 // Upgrade to Version 5 for assembly actions like clang -c a.s.
3604 if (Ctx.getDwarfVersion() < 5)
3605 Ctx.setDwarfVersion(5);
3606 getStreamer().emitDwarfFile0Directive(Directory, Filename, CKMem, Source);
3607 } else {
3608 Expected<unsigned> FileNumOrErr = getStreamer().tryEmitDwarfFileDirective(
3609 FileNumber, Directory, Filename, CKMem, Source);
3610 if (!FileNumOrErr)
3611 return Error(DirectiveLoc, toString(FileNumOrErr.takeError()));
3612 }
3613 // Alert the user if there are some .file directives with MD5 and some not.
3614 // But only do that once.
3615 if (!ReportedInconsistentMD5 && !Ctx.isDwarfMD5UsageConsistent(0)) {
3616 ReportedInconsistentMD5 = true;
3617 return Warning(DirectiveLoc, "inconsistent use of MD5 checksums");
3618 }
3619 }
3620
3621 return false;
3622}
3623
3624/// parseDirectiveLine
3625/// ::= .line [number]
3626bool AsmParser::parseDirectiveLine() {
3627 int64_t LineNumber;
3628 if (getLexer().is(AsmToken::Integer)) {
3629 if (parseIntToken(LineNumber, "unexpected token in '.line' directive"))
3630 return true;
3631 (void)LineNumber;
3632 // FIXME: Do something with the .line.
3633 }
3634 return parseEOL();
3635}
3636
3637/// parseDirectiveLoc
3638/// ::= .loc FileNumber [LineNumber] [ColumnPos] [basic_block] [prologue_end]
3639/// [epilogue_begin] [is_stmt VALUE] [isa VALUE]
3640/// The first number is a file number, must have been previously assigned with
3641/// a .file directive, the second number is the line number and optionally the
3642/// third number is a column position (zero if not specified). The remaining
3643/// optional items are .loc sub-directives.
3644bool AsmParser::parseDirectiveLoc() {
3645 int64_t FileNumber = 0, LineNumber = 0;
3646 SMLoc Loc = getTok().getLoc();
3647 if (parseIntToken(FileNumber, "unexpected token in '.loc' directive") ||
3648 check(FileNumber < 1 && Ctx.getDwarfVersion() < 5, Loc,
3649 "file number less than one in '.loc' directive") ||
3650 check(!getContext().isValidDwarfFileNumber(FileNumber), Loc,
3651 "unassigned file number in '.loc' directive"))
3652 return true;
3653
3654 // optional
3655 if (getLexer().is(AsmToken::Integer)) {
3656 LineNumber = getTok().getIntVal();
3657 if (LineNumber < 0)
3658 return TokError("line number less than zero in '.loc' directive");
3659 Lex();
3660 }
3661
3662 int64_t ColumnPos = 0;
3663 if (getLexer().is(AsmToken::Integer)) {
3664 ColumnPos = getTok().getIntVal();
3665 if (ColumnPos < 0)
3666 return TokError("column position less than zero in '.loc' directive");
3667 Lex();
3668 }
3669
3670 auto PrevFlags = getContext().getCurrentDwarfLoc().getFlags();
3671 unsigned Flags = PrevFlags & DWARF2_FLAG_IS_STMT;
3672 unsigned Isa = 0;
3673 int64_t Discriminator = 0;
3674
3675 auto parseLocOp = [&]() -> bool {
3677 SMLoc Loc = getTok().getLoc();
3678 if (parseIdentifier(Name))
3679 return TokError("unexpected token in '.loc' directive");
3680
3681 if (Name == "basic_block")
3683 else if (Name == "prologue_end")
3685 else if (Name == "epilogue_begin")
3687 else if (Name == "is_stmt") {
3688 Loc = getTok().getLoc();
3689 const MCExpr *Value;
3690 if (parseExpression(Value))
3691 return true;
3692 // The expression must be the constant 0 or 1.
3693 if (const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Value)) {
3694 int Value = MCE->getValue();
3695 if (Value == 0)
3696 Flags &= ~DWARF2_FLAG_IS_STMT;
3697 else if (Value == 1)
3699 else
3700 return Error(Loc, "is_stmt value not 0 or 1");
3701 } else {
3702 return Error(Loc, "is_stmt value not the constant value of 0 or 1");
3703 }
3704 } else if (Name == "isa") {
3705 Loc = getTok().getLoc();
3706 const MCExpr *Value;
3707 if (parseExpression(Value))
3708 return true;
3709 // The expression must be a constant greater or equal to 0.
3710 if (const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Value)) {
3711 int Value = MCE->getValue();
3712 if (Value < 0)
3713 return Error(Loc, "isa number less than zero");
3714 Isa = Value;
3715 } else {
3716 return Error(Loc, "isa number not a constant value");
3717 }
3718 } else if (Name == "discriminator") {
3719 if (parseAbsoluteExpression(Discriminator))
3720 return true;
3721 } else {
3722 return Error(Loc, "unknown sub-directive in '.loc' directive");
3723 }
3724 return false;
3725 };
3726
3727 if (parseMany(parseLocOp, false /*hasComma*/))
3728 return true;
3729
3730 getStreamer().emitDwarfLocDirective(FileNumber, LineNumber, ColumnPos, Flags,
3731 Isa, Discriminator, StringRef());
3732
3733 return false;
3734}
3735
3736/// parseDirectiveStabs
3737/// ::= .stabs string, number, number, number
3738bool AsmParser::parseDirectiveStabs() {
3739 return TokError("unsupported directive '.stabs'");
3740}
3741
3742/// parseDirectiveCVFile
3743/// ::= .cv_file number filename [checksum] [checksumkind]
3744bool AsmParser::parseDirectiveCVFile() {
3745 SMLoc FileNumberLoc = getTok().getLoc();
3746 int64_t FileNumber;
3747 std::string Filename;
3748 std::string Checksum;
3749 int64_t ChecksumKind = 0;
3750
3751 if (parseIntToken(FileNumber,
3752 "expected file number in '.cv_file' directive") ||
3753 check(FileNumber < 1, FileNumberLoc, "file number less than one") ||
3754 check(getTok().isNot(AsmToken::String),
3755 "unexpected token in '.cv_file' directive") ||
3756 parseEscapedString(Filename))
3757 return true;
3758 if (!parseOptionalToken(AsmToken::EndOfStatement)) {
3759 if (check(getTok().isNot(AsmToken::String),
3760 "unexpected token in '.cv_file' directive") ||
3761 parseEscapedString(Checksum) ||
3762 parseIntToken(ChecksumKind,
3763 "expected checksum kind in '.cv_file' directive") ||
3764 parseEOL())
3765 return true;
3766 }
3767
3768 Checksum = fromHex(Checksum);
3769 void *CKMem = Ctx.allocate(Checksum.size(), 1);
3770 memcpy(CKMem, Checksum.data(), Checksum.size());
3771 ArrayRef<uint8_t> ChecksumAsBytes(reinterpret_cast<const uint8_t *>(CKMem),
3772 Checksum.size());
3773
3774 if (!getStreamer().emitCVFileDirective(FileNumber, Filename, ChecksumAsBytes,
3775 static_cast<uint8_t>(ChecksumKind)))
3776 return Error(FileNumberLoc, "file number already allocated");
3777
3778 return false;
3779}
3780
3781bool AsmParser::parseCVFunctionId(int64_t &FunctionId,
3782 StringRef DirectiveName) {
3783 SMLoc Loc;
3784 return parseTokenLoc(Loc) ||
3785 parseIntToken(FunctionId, "expected function id in '" + DirectiveName +
3786 "' directive") ||
3787 check(FunctionId < 0 || FunctionId >= UINT_MAX, Loc,
3788 "expected function id within range [0, UINT_MAX)");
3789}
3790
3791bool AsmParser::parseCVFileId(int64_t &FileNumber, StringRef DirectiveName) {
3792 SMLoc Loc;
3793 return parseTokenLoc(Loc) ||
3794 parseIntToken(FileNumber, "expected integer in '" + DirectiveName +
3795 "' directive") ||
3796 check(FileNumber < 1, Loc, "file number less than one in '" +
3797 DirectiveName + "' directive") ||
3798 check(!getCVContext().isValidFileNumber(FileNumber), Loc,
3799 "unassigned file number in '" + DirectiveName + "' directive");
3800}
3801
3802/// parseDirectiveCVFuncId
3803/// ::= .cv_func_id FunctionId
3804///
3805/// Introduces a function ID that can be used with .cv_loc.
3806bool AsmParser::parseDirectiveCVFuncId() {
3807 SMLoc FunctionIdLoc = getTok().getLoc();
3808 int64_t FunctionId;
3809
3810 if (parseCVFunctionId(FunctionId, ".cv_func_id") || parseEOL())
3811 return true;
3812
3813 if (!getStreamer().emitCVFuncIdDirective(FunctionId))
3814 return Error(FunctionIdLoc, "function id already allocated");
3815
3816 return false;
3817}
3818
3819/// parseDirectiveCVInlineSiteId
3820/// ::= .cv_inline_site_id FunctionId
3821/// "within" IAFunc
3822/// "inlined_at" IAFile IALine [IACol]
3823///
3824/// Introduces a function ID that can be used with .cv_loc. Includes "inlined
3825/// at" source location information for use in the line table of the caller,
3826/// whether the caller is a real function or another inlined call site.
3827bool AsmParser::parseDirectiveCVInlineSiteId() {
3828 SMLoc FunctionIdLoc = getTok().getLoc();
3829 int64_t FunctionId;
3830 int64_t IAFunc;
3831 int64_t IAFile;
3832 int64_t IALine;
3833 int64_t IACol = 0;
3834
3835 // FunctionId
3836 if (parseCVFunctionId(FunctionId, ".cv_inline_site_id"))
3837 return true;
3838
3839 // "within"
3840 if (check((getLexer().isNot(AsmToken::Identifier) ||
3841 getTok().getIdentifier() != "within"),
3842 "expected 'within' identifier in '.cv_inline_site_id' directive"))
3843 return true;
3844 Lex();
3845
3846 // IAFunc
3847 if (parseCVFunctionId(IAFunc, ".cv_inline_site_id"))
3848 return true;
3849
3850 // "inlined_at"
3851 if (check((getLexer().isNot(AsmToken::Identifier) ||
3852 getTok().getIdentifier() != "inlined_at"),
3853 "expected 'inlined_at' identifier in '.cv_inline_site_id' "
3854 "directive") )
3855 return true;
3856 Lex();
3857
3858 // IAFile IALine
3859 if (parseCVFileId(IAFile, ".cv_inline_site_id") ||
3860 parseIntToken(IALine, "expected line number after 'inlined_at'"))
3861 return true;
3862
3863 // [IACol]
3864 if (getLexer().is(AsmToken::Integer)) {
3865 IACol = getTok().getIntVal();
3866 Lex();
3867 }
3868
3869 if (parseEOL())
3870 return true;
3871
3872 if (!getStreamer().emitCVInlineSiteIdDirective(FunctionId, IAFunc, IAFile,
3873 IALine, IACol, FunctionIdLoc))
3874 return Error(FunctionIdLoc, "function id already allocated");
3875
3876 return false;
3877}
3878
3879/// parseDirectiveCVLoc
3880/// ::= .cv_loc FunctionId FileNumber [LineNumber] [ColumnPos] [prologue_end]
3881/// [is_stmt VALUE]
3882/// The first number is a file number, must have been previously assigned with
3883/// a .file directive, the second number is the line number and optionally the
3884/// third number is a column position (zero if not specified). The remaining
3885/// optional items are .loc sub-directives.
3886bool AsmParser::parseDirectiveCVLoc() {
3887 SMLoc DirectiveLoc = getTok().getLoc();
3888 int64_t FunctionId, FileNumber;
3889 if (parseCVFunctionId(FunctionId, ".cv_loc") ||
3890 parseCVFileId(FileNumber, ".cv_loc"))
3891 return true;
3892
3893 int64_t LineNumber = 0;
3894 if (getLexer().is(AsmToken::Integer)) {
3895 LineNumber = getTok().getIntVal();
3896 if (LineNumber < 0)
3897 return TokError("line number less than zero in '.cv_loc' directive");
3898 Lex();
3899 }
3900
3901 int64_t ColumnPos = 0;
3902 if (getLexer().is(AsmToken::Integer)) {
3903 ColumnPos = getTok().getIntVal();
3904 if (ColumnPos < 0)
3905 return TokError("column position less than zero in '.cv_loc' directive");
3906 Lex();
3907 }
3908
3909 bool PrologueEnd = false;
3910 uint64_t IsStmt = 0;
3911
3912 auto parseOp = [&]() -> bool {
3914 SMLoc Loc = getTok().getLoc();
3915 if (parseIdentifier(Name))
3916 return TokError("unexpected token in '.cv_loc' directive");
3917 if (Name == "prologue_end")
3918 PrologueEnd = true;
3919 else if (Name == "is_stmt") {
3920 Loc = getTok().getLoc();
3921 const MCExpr *Value;
3922 if (parseExpression(Value))
3923 return true;
3924 // The expression must be the constant 0 or 1.
3925 IsStmt = ~0ULL;
3926 if (const auto *MCE = dyn_cast<MCConstantExpr>(Value))
3927 IsStmt = MCE->getValue();
3928
3929 if (IsStmt > 1)
3930 return Error(Loc, "is_stmt value not 0 or 1");
3931 } else {
3932 return Error(Loc, "unknown sub-directive in '.cv_loc' directive");
3933 }
3934 return false;
3935 };
3936
3937 if (parseMany(parseOp, false /*hasComma*/))
3938 return true;
3939
3940 getStreamer().emitCVLocDirective(FunctionId, FileNumber, LineNumber,
3941 ColumnPos, PrologueEnd, IsStmt, StringRef(),
3942 DirectiveLoc);
3943 return false;
3944}
3945
3946/// parseDirectiveCVLinetable
3947/// ::= .cv_linetable FunctionId, FnStart, FnEnd
3948bool AsmParser::parseDirectiveCVLinetable() {
3949 int64_t FunctionId;
3950 StringRef FnStartName, FnEndName;
3951 SMLoc Loc = getTok().getLoc();
3952 if (parseCVFunctionId(FunctionId, ".cv_linetable") || parseComma() ||
3953 parseTokenLoc(Loc) ||
3954 check(parseIdentifier(FnStartName), Loc,
3955 "expected identifier in directive") ||
3956 parseComma() || parseTokenLoc(Loc) ||
3957 check(parseIdentifier(FnEndName), Loc,
3958 "expected identifier in directive"))
3959 return true;
3960
3961 MCSymbol *FnStartSym = getContext().getOrCreateSymbol(FnStartName);
3962 MCSymbol *FnEndSym = getContext().getOrCreateSymbol(FnEndName);
3963
3964 getStreamer().emitCVLinetableDirective(FunctionId, FnStartSym, FnEndSym);
3965 return false;
3966}
3967
3968/// parseDirectiveCVInlineLinetable
3969/// ::= .cv_inline_linetable PrimaryFunctionId FileId LineNum FnStart FnEnd
3970bool AsmParser::parseDirectiveCVInlineLinetable() {
3971 int64_t PrimaryFunctionId, SourceFileId, SourceLineNum;
3972 StringRef FnStartName, FnEndName;
3973 SMLoc Loc = getTok().getLoc();
3974 if (parseCVFunctionId(PrimaryFunctionId, ".cv_inline_linetable") ||
3975 parseTokenLoc(Loc) ||
3976 parseIntToken(
3977 SourceFileId,
3978 "expected SourceField in '.cv_inline_linetable' directive") ||
3979 check(SourceFileId <= 0, Loc,
3980 "File id less than zero in '.cv_inline_linetable' directive") ||
3981 parseTokenLoc(Loc) ||
3982 parseIntToken(
3983 SourceLineNum,
3984 "expected SourceLineNum in '.cv_inline_linetable' directive") ||
3985 check(SourceLineNum < 0, Loc,
3986 "Line number less than zero in '.cv_inline_linetable' directive") ||
3987 parseTokenLoc(Loc) || check(parseIdentifier(FnStartName), Loc,
3988 "expected identifier in directive") ||
3989 parseTokenLoc(Loc) || check(parseIdentifier(FnEndName), Loc,
3990 "expected identifier in directive"))
3991 return true;
3992
3993 if (parseEOL())
3994 return true;
3995
3996 MCSymbol *FnStartSym = getContext().getOrCreateSymbol(FnStartName);
3997 MCSymbol *FnEndSym = getContext().getOrCreateSymbol(FnEndName);
3998 getStreamer().emitCVInlineLinetableDirective(PrimaryFunctionId, SourceFileId,
3999 SourceLineNum, FnStartSym,
4000 FnEndSym);
4001 return false;
4002}
4003
4004void AsmParser::initializeCVDefRangeTypeMap() {
4005 CVDefRangeTypeMap["reg"] = CVDR_DEFRANGE_REGISTER;
4006 CVDefRangeTypeMap["frame_ptr_rel"] = CVDR_DEFRANGE_FRAMEPOINTER_REL;
4007 CVDefRangeTypeMap["subfield_reg"] = CVDR_DEFRANGE_SUBFIELD_REGISTER;
4008 CVDefRangeTypeMap["reg_rel"] = CVDR_DEFRANGE_REGISTER_REL;
4009}
4010
4011/// parseDirectiveCVDefRange
4012/// ::= .cv_def_range RangeStart RangeEnd (GapStart GapEnd)*, bytes*
4013bool AsmParser::parseDirectiveCVDefRange() {
4014 SMLoc Loc;
4015 std::vector<std::pair<const MCSymbol *, const MCSymbol *>> Ranges;
4016 while (getLexer().is(AsmToken::Identifier)) {
4017 Loc = getLexer().getLoc();
4018 StringRef GapStartName;
4019 if (parseIdentifier(GapStartName))
4020 return Error(Loc, "expected identifier in directive");
4021 MCSymbol *GapStartSym = getContext().getOrCreateSymbol(GapStartName);
4022
4023 Loc = getLexer().getLoc();
4024 StringRef GapEndName;
4025 if (parseIdentifier(GapEndName))
4026 return Error(Loc, "expected identifier in directive");
4027 MCSymbol *GapEndSym = getContext().getOrCreateSymbol(GapEndName);
4028
4029 Ranges.push_back({GapStartSym, GapEndSym});
4030 }
4031
4032 StringRef CVDefRangeTypeStr;
4033 if (parseToken(
4035 "expected comma before def_range type in .cv_def_range directive") ||
4036 parseIdentifier(CVDefRangeTypeStr))
4037 return Error(Loc, "expected def_range type in directive");
4038
4040 CVDefRangeTypeMap.find(CVDefRangeTypeStr);
4041 CVDefRangeType CVDRType = (CVTypeIt == CVDefRangeTypeMap.end())
4042 ? CVDR_DEFRANGE
4043 : CVTypeIt->getValue();
4044 switch (CVDRType) {
4045 case CVDR_DEFRANGE_REGISTER: {
4046 int64_t DRRegister;
4047 if (parseToken(AsmToken::Comma, "expected comma before register number in "
4048 ".cv_def_range directive") ||
4049 parseAbsoluteExpression(DRRegister))
4050 return Error(Loc, "expected register number");
4051
4053 DRHdr.Register = DRRegister;
4054 DRHdr.MayHaveNoName = 0;
4055 getStreamer().emitCVDefRangeDirective(Ranges, DRHdr);
4056 break;
4057 }
4058 case CVDR_DEFRANGE_FRAMEPOINTER_REL: {
4059 int64_t DROffset;
4060 if (parseToken(AsmToken::Comma,
4061 "expected comma before offset in .cv_def_range directive") ||
4062 parseAbsoluteExpression(DROffset))
4063 return Error(Loc, "expected offset value");
4064
4066 DRHdr.Offset = DROffset;
4067 getStreamer().emitCVDefRangeDirective(Ranges, DRHdr);
4068 break;
4069 }
4070 case CVDR_DEFRANGE_SUBFIELD_REGISTER: {
4071 int64_t DRRegister;
4072 int64_t DROffsetInParent;
4073 if (parseToken(AsmToken::Comma, "expected comma before register number in "
4074 ".cv_def_range directive") ||
4075 parseAbsoluteExpression(DRRegister))
4076 return Error(Loc, "expected register number");
4077 if (parseToken(AsmToken::Comma,
4078 "expected comma before offset in .cv_def_range directive") ||
4079 parseAbsoluteExpression(DROffsetInParent))
4080 return Error(Loc, "expected offset value");
4081
4083 DRHdr.Register = DRRegister;
4084 DRHdr.MayHaveNoName = 0;
4085 DRHdr.OffsetInParent = DROffsetInParent;
4086 getStreamer().emitCVDefRangeDirective(Ranges, DRHdr);
4087 break;
4088 }
4089 case CVDR_DEFRANGE_REGISTER_REL: {
4090 int64_t DRRegister;
4091 int64_t DRFlags;
4092 int64_t DRBasePointerOffset;
4093 if (parseToken(AsmToken::Comma, "expected comma before register number in "
4094 ".cv_def_range directive") ||
4095 parseAbsoluteExpression(DRRegister))
4096 return Error(Loc, "expected register value");
4097 if (parseToken(
4099 "expected comma before flag value in .cv_def_range directive") ||
4100 parseAbsoluteExpression(DRFlags))
4101 return Error(Loc, "expected flag value");
4102 if (parseToken(AsmToken::Comma, "expected comma before base pointer offset "
4103 "in .cv_def_range directive") ||
4104 parseAbsoluteExpression(DRBasePointerOffset))
4105 return Error(Loc, "expected base pointer offset value");
4106
4108 DRHdr.Register = DRRegister;
4109 DRHdr.Flags = DRFlags;
4110 DRHdr.BasePointerOffset = DRBasePointerOffset;
4111 getStreamer().emitCVDefRangeDirective(Ranges, DRHdr);
4112 break;
4113 }
4114 default:
4115 return Error(Loc, "unexpected def_range type in .cv_def_range directive");
4116 }
4117 return true;
4118}
4119
4120/// parseDirectiveCVString
4121/// ::= .cv_stringtable "string"
4122bool AsmParser::parseDirectiveCVString() {
4123 std::string Data;
4124 if (checkForValidSection() || parseEscapedString(Data))
4125 return true;
4126
4127 // Put the string in the table and emit the offset.
4128 std::pair<StringRef, unsigned> Insertion =
4129 getCVContext().addToStringTable(Data);
4130 getStreamer().emitInt32(Insertion.second);
4131 return false;
4132}
4133
4134/// parseDirectiveCVStringTable
4135/// ::= .cv_stringtable
4136bool AsmParser::parseDirectiveCVStringTable() {
4137 getStreamer().emitCVStringTableDirective();
4138 return false;
4139}
4140
4141/// parseDirectiveCVFileChecksums
4142/// ::= .cv_filechecksums
4143bool AsmParser::parseDirectiveCVFileChecksums() {
4144 getStreamer().emitCVFileChecksumsDirective();
4145 return false;
4146}
4147
4148/// parseDirectiveCVFileChecksumOffset
4149/// ::= .cv_filechecksumoffset fileno
4150bool AsmParser::parseDirectiveCVFileChecksumOffset() {
4151 int64_t FileNo;
4152 if (parseIntToken(FileNo, "expected identifier in directive"))
4153 return true;
4154 if (parseEOL())
4155 return true;
4156 getStreamer().emitCVFileChecksumOffsetDirective(FileNo);
4157 return false;
4158}
4159
4160/// parseDirectiveCVFPOData
4161/// ::= .cv_fpo_data procsym
4162bool AsmParser::parseDirectiveCVFPOData() {
4163 SMLoc DirLoc = getLexer().getLoc();
4164 StringRef ProcName;
4165 if (parseIdentifier(ProcName))
4166 return TokError("expected symbol name");
4167 if (parseEOL())
4168 return true;
4169 MCSymbol *ProcSym = getContext().getOrCreateSymbol(ProcName);
4170 getStreamer().emitCVFPOData(ProcSym, DirLoc);
4171 return false;
4172}
4173
4174/// parseDirectiveCFISections
4175/// ::= .cfi_sections section [, section]
4176bool AsmParser::parseDirectiveCFISections() {
4178 bool EH = false;
4179 bool Debug = false;
4180
4181 if (!parseOptionalToken(AsmToken::EndOfStatement)) {
4182 for (;;) {
4183 if (parseIdentifier(Name))
4184 return TokError("expected .eh_frame or .debug_frame");
4185 if (Name == ".eh_frame")
4186 EH = true;
4187 else if (Name == ".debug_frame")
4188 Debug = true;
4189 if (parseOptionalToken(AsmToken::EndOfStatement))
4190 break;
4191 if (parseComma())
4192 return true;
4193 }
4194 }
4195 getStreamer().emitCFISections(EH, Debug);
4196 return false;
4197}
4198
4199/// parseDirectiveCFIStartProc
4200/// ::= .cfi_startproc [simple]
4201bool AsmParser::parseDirectiveCFIStartProc() {
4202 CFIStartProcLoc = StartTokLoc;
4203
4205 if (!parseOptionalToken(AsmToken::EndOfStatement)) {
4206 if (check(parseIdentifier(Simple) || Simple != "simple",
4207 "unexpected token") ||
4208 parseEOL())
4209 return true;
4210 }
4211
4212 // TODO(kristina): Deal with a corner case of incorrect diagnostic context
4213 // being produced if this directive is emitted as part of preprocessor macro
4214 // expansion which can *ONLY* happen if Clang's cc1as is the API consumer.
4215 // Tools like llvm-mc on the other hand are not affected by it, and report
4216 // correct context information.
4217 getStreamer().emitCFIStartProc(!Simple.empty(), Lexer.getLoc());
4218 return false;
4219}
4220
4221/// parseDirectiveCFIEndProc
4222/// ::= .cfi_endproc
4223bool AsmParser::parseDirectiveCFIEndProc() {
4224 CFIStartProcLoc = std::nullopt;
4225
4226 if (parseEOL())
4227 return true;
4228
4229 getStreamer().emitCFIEndProc();
4230 return false;
4231}
4232
4233/// parse register name or number.
4234bool AsmParser::parseRegisterOrRegisterNumber(int64_t &Register,
4235 SMLoc DirectiveLoc) {
4236 MCRegister RegNo;
4237
4238 if (getLexer().isNot(AsmToken::Integer)) {
4239 if (getTargetParser().parseRegister(RegNo, DirectiveLoc, DirectiveLoc))
4240 return true;
4241 Register = getContext().getRegisterInfo()->getDwarfRegNum(RegNo, true);
4242 } else
4243 return parseAbsoluteExpression(Register);
4244
4245 return false;
4246}
4247
4248/// parseDirectiveCFIDefCfa
4249/// ::= .cfi_def_cfa register, offset
4250bool AsmParser::parseDirectiveCFIDefCfa(SMLoc DirectiveLoc) {
4251 int64_t Register = 0, Offset = 0;
4252 if (parseRegisterOrRegisterNumber(Register, DirectiveLoc) || parseComma() ||
4253 parseAbsoluteExpression(Offset) || parseEOL())
4254 return true;
4255
4256 getStreamer().emitCFIDefCfa(Register, Offset, DirectiveLoc);
4257 return false;
4258}
4259
4260/// parseDirectiveCFIDefCfaOffset
4261/// ::= .cfi_def_cfa_offset offset
4262bool AsmParser::parseDirectiveCFIDefCfaOffset(SMLoc DirectiveLoc) {
4263 int64_t Offset = 0;
4264 if (parseAbsoluteExpression(Offset) || parseEOL())
4265 return true;
4266
4267 getStreamer().emitCFIDefCfaOffset(Offset, DirectiveLoc);
4268 return false;
4269}
4270
4271/// parseDirectiveCFIRegister
4272/// ::= .cfi_register register, register
4273bool AsmParser::parseDirectiveCFIRegister(SMLoc DirectiveLoc) {
4274 int64_t Register1 = 0, Register2 = 0;
4275 if (parseRegisterOrRegisterNumber(Register1, DirectiveLoc) || parseComma() ||
4276 parseRegisterOrRegisterNumber(Register2, DirectiveLoc) || parseEOL())
4277 return true;
4278
4279 getStreamer().emitCFIRegister(Register1, Register2, DirectiveLoc);
4280 return false;
4281}
4282
4283/// parseDirectiveCFIWindowSave
4284/// ::= .cfi_window_save
4285bool AsmParser::parseDirectiveCFIWindowSave(SMLoc DirectiveLoc) {
4286 if (parseEOL())
4287 return true;
4288 getStreamer().emitCFIWindowSave(DirectiveLoc);
4289 return false;
4290}
4291
4292/// parseDirectiveCFIAdjustCfaOffset
4293/// ::= .cfi_adjust_cfa_offset adjustment
4294bool AsmParser::parseDirectiveCFIAdjustCfaOffset(SMLoc DirectiveLoc) {
4295 int64_t Adjustment = 0;
4296 if (parseAbsoluteExpression(Adjustment) || parseEOL())
4297 return true;
4298
4299 getStreamer().emitCFIAdjustCfaOffset(Adjustment, DirectiveLoc);
4300 return false;
4301}
4302
4303/// parseDirectiveCFIDefCfaRegister
4304/// ::= .cfi_def_cfa_register register
4305bool AsmParser::parseDirectiveCFIDefCfaRegister(SMLoc DirectiveLoc) {
4306 int64_t Register = 0;
4307 if (parseRegisterOrRegisterNumber(Register, DirectiveLoc) || parseEOL())
4308 return true;
4309
4310 getStreamer().emitCFIDefCfaRegister(Register, DirectiveLoc);
4311 return false;
4312}
4313
4314/// parseDirectiveCFILLVMDefAspaceCfa
4315/// ::= .cfi_llvm_def_aspace_cfa register, offset, address_space
4316bool AsmParser::parseDirectiveCFILLVMDefAspaceCfa(SMLoc DirectiveLoc) {
4317 int64_t Register = 0, Offset = 0, AddressSpace = 0;
4318 if (parseRegisterOrRegisterNumber(Register, DirectiveLoc) || parseComma() ||
4319 parseAbsoluteExpression(Offset) || parseComma() ||
4320 parseAbsoluteExpression(AddressSpace) || parseEOL())
4321 return true;
4322
4323 getStreamer().emitCFILLVMDefAspaceCfa(Register, Offset, AddressSpace,
4324 DirectiveLoc);
4325 return false;
4326}
4327
4328/// parseDirectiveCFIOffset
4329/// ::= .cfi_offset register, offset
4330bool AsmParser::parseDirectiveCFIOffset(SMLoc DirectiveLoc) {
4331 int64_t Register = 0;
4332 int64_t Offset = 0;
4333
4334 if (parseRegisterOrRegisterNumber(Register, DirectiveLoc) || parseComma() ||
4335 parseAbsoluteExpression(Offset) || parseEOL())
4336 return true;
4337
4338 getStreamer().emitCFIOffset(Register, Offset, DirectiveLoc);
4339 return false;
4340}
4341
4342/// parseDirectiveCFIRelOffset
4343/// ::= .cfi_rel_offset register, offset
4344bool AsmParser::parseDirectiveCFIRelOffset(SMLoc DirectiveLoc) {
4345 int64_t Register = 0, Offset = 0;
4346
4347 if (parseRegisterOrRegisterNumber(Register, DirectiveLoc) || parseComma() ||
4348 parseAbsoluteExpression(Offset) || parseEOL())
4349 return true;
4350
4351 getStreamer().emitCFIRelOffset(Register, Offset, DirectiveLoc);
4352 return false;
4353}
4354
4355static bool isValidEncoding(int64_t Encoding) {
4356 if (Encoding & ~0xff)
4357 return false;
4358
4359 if (Encoding == dwarf::DW_EH_PE_omit)
4360 return true;
4361
4362 const unsigned Format = Encoding & 0xf;
4363 if (Format != dwarf::DW_EH_PE_absptr && Format != dwarf::DW_EH_PE_udata2 &&
4364 Format != dwarf::DW_EH_PE_udata4 && Format != dwarf::DW_EH_PE_udata8 &&
4365 Format != dwarf::DW_EH_PE_sdata2 && Format != dwarf::DW_EH_PE_sdata4 &&
4366 Format != dwarf::DW_EH_PE_sdata8 && Format != dwarf::DW_EH_PE_signed)
4367 return false;
4368
4369 const unsigned Application = Encoding & 0x70;
4370 if (Application != dwarf::DW_EH_PE_absptr &&
4371 Application != dwarf::DW_EH_PE_pcrel)
4372 return false;
4373
4374 return true;
4375}
4376
4377/// parseDirectiveCFIPersonalityOrLsda
4378/// IsPersonality true for cfi_personality, false for cfi_lsda
4379/// ::= .cfi_personality encoding, [symbol_name]
4380/// ::= .cfi_lsda encoding, [symbol_name]
4381bool AsmParser::parseDirectiveCFIPersonalityOrLsda(bool IsPersonality) {
4382 int64_t Encoding = 0;
4383 if (parseAbsoluteExpression(Encoding))
4384 return true;
4385 if (Encoding == dwarf::DW_EH_PE_omit)
4386 return false;
4387
4389 if (check(!isValidEncoding(Encoding), "unsupported encoding.") ||
4390 parseComma() ||
4391 check(parseIdentifier(Name), "expected identifier in directive") ||
4392 parseEOL())
4393 return true;
4394
4395 MCSymbol *Sym = getContext().getOrCreateSymbol(Name);
4396
4397 if (IsPersonality)
4398 getStreamer().emitCFIPersonality(Sym, Encoding);
4399 else
4400 getStreamer().emitCFILsda(Sym, Encoding);
4401 return false;
4402}
4403
4404/// parseDirectiveCFIRememberState
4405/// ::= .cfi_remember_state
4406bool AsmParser::parseDirectiveCFIRememberState(SMLoc DirectiveLoc) {
4407 if (parseEOL())
4408 return true;
4409 getStreamer().emitCFIRememberState(DirectiveLoc);
4410 return false;
4411}
4412
4413/// parseDirectiveCFIRestoreState
4414/// ::= .cfi_remember_state
4415bool AsmParser::parseDirectiveCFIRestoreState(SMLoc DirectiveLoc) {
4416 if (parseEOL())
4417 return true;
4418 getStreamer().emitCFIRestoreState(DirectiveLoc);
4419 return false;
4420}
4421
4422/// parseDirectiveCFISameValue
4423/// ::= .cfi_same_value register
4424bool AsmParser::parseDirectiveCFISameValue(SMLoc DirectiveLoc) {
4425 int64_t Register = 0;
4426
4427 if (parseRegisterOrRegisterNumber(Register, DirectiveLoc) || parseEOL())
4428 return true;
4429
4430 getStreamer().emitCFISameValue(Register, DirectiveLoc);
4431 return false;
4432}
4433
4434/// parseDirectiveCFIRestore
4435/// ::= .cfi_restore register
4436bool AsmParser::parseDirectiveCFIRestore(SMLoc DirectiveLoc) {
4437 int64_t Register = 0;
4438 if (parseRegisterOrRegisterNumber(Register, DirectiveLoc) || parseEOL())
4439 return true;
4440
4441 getStreamer().emitCFIRestore(Register, DirectiveLoc);
4442 return false;
4443}
4444
4445/// parseDirectiveCFIEscape
4446/// ::= .cfi_escape expression[,...]
4447bool AsmParser::parseDirectiveCFIEscape(SMLoc DirectiveLoc) {
4448 std::string Values;
4449 int64_t CurrValue;
4450 if (parseAbsoluteExpression(CurrValue))
4451 return true;
4452
4453 Values.push_back((uint8_t)CurrValue);
4454
4455 while (getLexer().is(AsmToken::Comma)) {
4456 Lex();
4457
4458 if (parseAbsoluteExpression(CurrValue))
4459 return true;
4460
4461 Values.push_back((uint8_t)CurrValue);
4462 }
4463
4464 getStreamer().emitCFIEscape(Values, DirectiveLoc);
4465 return false;
4466}
4467
4468/// parseDirectiveCFIReturnColumn
4469/// ::= .cfi_return_column register
4470bool AsmParser::parseDirectiveCFIReturnColumn(SMLoc DirectiveLoc) {
4471 int64_t Register = 0;
4472 if (parseRegisterOrRegisterNumber(Register, DirectiveLoc) || parseEOL())
4473 return true;
4474 getStreamer().emitCFIReturnColumn(Register);
4475 return false;
4476}
4477
4478/// parseDirectiveCFISignalFrame
4479/// ::= .cfi_signal_frame
4480bool AsmParser::parseDirectiveCFISignalFrame(SMLoc DirectiveLoc) {
4481 if (parseEOL())
4482 return true;
4483
4484 getStreamer().emitCFISignalFrame();
4485 return false;
4486}
4487
4488/// parseDirectiveCFIUndefined
4489/// ::= .cfi_undefined register
4490bool AsmParser::parseDirectiveCFIUndefined(SMLoc DirectiveLoc) {
4491 int64_t Register = 0;
4492
4493 if (parseRegisterOrRegisterNumber(Register, DirectiveLoc) || parseEOL())
4494 return true;
4495
4496 getStreamer().emitCFIUndefined(Register, DirectiveLoc);
4497 return false;
4498}
4499
4500/// parseDirectiveAltmacro
4501/// ::= .altmacro
4502/// ::= .noaltmacro
4503bool AsmParser::parseDirectiveAltmacro(StringRef Directive) {
4504 if (parseEOL())
4505 return true;
4506 AltMacroMode = (Directive == ".altmacro");
4507 return false;
4508}
4509
4510/// parseDirectiveMacrosOnOff
4511/// ::= .macros_on
4512/// ::= .macros_off
4513bool AsmParser::parseDirectiveMacrosOnOff(StringRef Directive) {
4514 if (parseEOL())
4515 return true;
4516 setMacrosEnabled(Directive == ".macros_on");
4517 return false;
4518}
4519
4520/// parseDirectiveMacro
4521/// ::= .macro name[,] [parameters]
4522bool AsmParser::parseDirectiveMacro(SMLoc DirectiveLoc) {
4524 if (parseIdentifier(Name))
4525 return TokError("expected identifier in '.macro' directive");
4526
4527 if (getLexer().is(AsmToken::Comma))
4528 Lex();
4529
4531 while (getLexer().isNot(AsmToken::EndOfStatement)) {
4532
4533 if (!Parameters.empty() && Parameters.back().Vararg)
4534 return Error(Lexer.getLoc(), "vararg parameter '" +
4535 Parameters.back().Name +
4536 "' should be the last parameter");
4537
4538 MCAsmMacroParameter Parameter;
4539 if (parseIdentifier(Parameter.Name))
4540 return TokError("expected identifier in '.macro' directive");
4541
4542 // Emit an error if two (or more) named parameters share the same name
4543 for (const MCAsmMacroParameter& CurrParam : Parameters)
4544 if (CurrParam.Name.equals(Parameter.Name))
4545 return TokError("macro '" + Name + "' has multiple parameters"
4546 " named '" + Parameter.Name + "'");
4547
4548 if (Lexer.is(AsmToken::Colon)) {
4549 Lex(); // consume ':'
4550
4551 SMLoc QualLoc;
4553
4554 QualLoc = Lexer.getLoc();
4555 if (parseIdentifier(Qualifier))
4556 return Error(QualLoc, "missing parameter qualifier for "
4557 "'" + Parameter.Name + "' in macro '" + Name + "'");
4558
4559 if (Qualifier == "req")
4560 Parameter.Required = true;
4561 else if (Qualifier == "vararg")
4562 Parameter.Vararg = true;
4563 else
4564 return Error(QualLoc, Qualifier + " is not a valid parameter qualifier "
4565 "for '" + Parameter.Name + "' in macro '" + Name + "'");
4566 }
4567
4568 if (getLexer().is(AsmToken::Equal)) {
4569 Lex();
4570
4571 SMLoc ParamLoc;
4572
4573 ParamLoc = Lexer.getLoc();
4574 if (parseMacroArgument(Parameter.Value, /*Vararg=*/false ))
4575 return true;
4576
4577 if (Parameter.Required)
4578 Warning(ParamLoc, "pointless default value for required parameter "
4579 "'" + Parameter.Name + "' in macro '" + Name + "'");
4580 }
4581
4582 Parameters.push_back(std::move(Parameter));
4583
4584 if (getLexer().is(AsmToken::Comma))
4585 Lex();
4586 }
4587
4588 // Eat just the end of statement.
4589 Lexer.Lex();
4590
4591 // Consuming deferred text, so use Lexer.Lex to ignore Lexing Errors
4592 AsmToken EndToken, StartToken = getTok();
4593 unsigned MacroDepth = 0;
4594 // Lex the macro definition.
4595 while (true) {
4596 // Ignore Lexing errors in macros.
4597 while (Lexer.is(AsmToken::Error)) {
4598 Lexer.Lex();
4599 }
4600
4601 // Check whether we have reached the end of the file.
4602 if (getLexer().is(AsmToken::Eof))
4603 return Error(DirectiveLoc, "no matching '.endmacro' in definition");
4604
4605 // Otherwise, check whether we have reach the .endmacro or the start of a
4606 // preprocessor line marker.
4607 if (getLexer().is(AsmToken::Identifier)) {
4608 if (getTok().getIdentifier() == ".endm" ||
4609 getTok().getIdentifier() == ".endmacro") {
4610 if (MacroDepth == 0) { // Outermost macro.
4611 EndToken = getTok();
4612 Lexer.Lex();
4613 if (getLexer().isNot(AsmToken::EndOfStatement))
4614 return TokError("unexpected token in '" + EndToken.getIdentifier() +
4615 "' directive");
4616 break;
4617 } else {
4618 // Otherwise we just found the end of an inner macro.
4619 --MacroDepth;
4620 }
4621 } else if (getTok().getIdentifier() == ".macro") {
4622 // We allow nested macros. Those aren't instantiated until the outermost
4623 // macro is expanded so just ignore them for now.
4624 ++MacroDepth;
4625 }
4626 } else if (Lexer.is(AsmToken::HashDirective)) {
4627 (void)parseCppHashLineFilenameComment(getLexer().getLoc());
4628 }
4629
4630 // Otherwise, scan til the end of the statement.
4631 eatToEndOfStatement();
4632 }
4633
4634 if (getContext().lookupMacro(Name)) {
4635 return Error(DirectiveLoc, "macro '" + Name + "' is already defined");
4636 }
4637
4638 const char *BodyStart = StartToken.getLoc().getPointer();
4639 const char *BodyEnd = EndToken.getLoc().getPointer();
4640 StringRef Body = StringRef(BodyStart, BodyEnd - BodyStart);
4641 checkForBadMacro(DirectiveLoc, Name, Body, Parameters);
4642 MCAsmMacro Macro(Name, Body, std::move(Parameters));
4643 DEBUG_WITH_TYPE("asm-macros", dbgs() << "Defining new macro:\n";
4644 Macro.dump());
4645 getContext().defineMacro(Name, std::move(Macro));
4646 return false;
4647}
4648
4649/// checkForBadMacro
4650///
4651/// With the support added for named parameters there may be code out there that
4652/// is transitioning from positional parameters. In versions of gas that did
4653/// not support named parameters they would be ignored on the macro definition.
4654/// But to support both styles of parameters this is not possible so if a macro
4655/// definition has named parameters but does not use them and has what appears
4656/// to be positional parameters, strings like $1, $2, ... and $n, then issue a
4657/// warning that the positional parameter found in body which have no effect.
4658/// Hoping the developer will either remove the named parameters from the macro
4659/// definition so the positional parameters get used if that was what was
4660/// intended or change the macro to use the named parameters. It is possible
4661/// this warning will trigger when the none of the named parameters are used
4662/// and the strings like $1 are infact to simply to be passed trough unchanged.
4663void AsmParser::checkForBadMacro(SMLoc DirectiveLoc, StringRef Name,
4664 StringRef Body,
4665 ArrayRef<MCAsmMacroParameter> Parameters) {
4666 // If this macro is not defined with named parameters the warning we are
4667 // checking for here doesn't apply.
4668 unsigned NParameters = Parameters.size();
4669 if (NParameters == 0)
4670 return;
4671
4672 bool NamedParametersFound = false;
4673 bool PositionalParametersFound = false;
4674
4675 // Look at the body of the macro for use of both the named parameters and what
4676 // are likely to be positional parameters. This is what expandMacro() is
4677 // doing when it finds the parameters in the body.
4678 while (!Body.empty()) {
4679 // Scan for the next possible parameter.
4680 std::size_t End = Body.size(), Pos = 0;
4681 for (; Pos != End; ++Pos) {
4682 // Check for a substitution or escape.
4683 // This macro is defined with parameters, look for \foo, \bar, etc.
4684 if (Body[Pos] == '\\' && Pos + 1 != End)
4685 break;
4686
4687 // This macro should have parameters, but look for $0, $1, ..., $n too.
4688 if (Body[Pos] != '$' || Pos + 1 == End)
4689 continue;
4690 char Next = Body[Pos + 1];
4691 if (Next == '$' || Next == 'n' ||
4692 isdigit(static_cast<unsigned char>(Next)))
4693 break;
4694 }
4695
4696 // Check if we reached the end.
4697 if (Pos == End)
4698 break;
4699
4700 if (Body[Pos] == '$') {
4701 switch (Body[Pos + 1]) {
4702 // $$ => $
4703 case '$':
4704 break;
4705
4706 // $n => number of arguments
4707 case 'n':
4708 PositionalParametersFound = true;
4709 break;
4710
4711 // $[0-9] => argument
4712 default: {
4713 PositionalParametersFound = true;
4714 break;
4715 }
4716 }
4717 Pos += 2;
4718 } else {
4719 unsigned I = Pos + 1;
4720 while (isIdentifierChar(Body[I]) && I + 1 != End)
4721 ++I;
4722
4723 const char *Begin = Body.data() + Pos + 1;
4724 StringRef Argument(Begin, I - (Pos + 1));
4725 unsigned Index = 0;
4726 for (; Index < NParameters; ++Index)
4727 if (Parameters[Index].Name == Argument)
4728 break;
4729
4730 if (Index == NParameters) {
4731 if (Body[Pos + 1] == '(' && Body[Pos + 2] == ')')
4732 Pos += 3;
4733 else {
4734 Pos = I;
4735 }
4736 } else {
4737 NamedParametersFound = true;
4738 Pos += 1 + Argument.size();
4739 }
4740 }
4741 // Update the scan point.
4742 Body = Body.substr(Pos);
4743 }
4744
4745 if (!NamedParametersFound && PositionalParametersFound)
4746 Warning(DirectiveLoc, "macro defined with named parameters which are not "
4747 "used in macro body, possible positional parameter "
4748 "found in body which will have no effect");
4749}
4750
4751/// parseDirectiveExitMacro
4752/// ::= .exitm
4753bool AsmParser::parseDirectiveExitMacro(StringRef Directive) {
4754 if (parseEOL())
4755 return true;
4756
4757 if (!isInsideMacroInstantiation())
4758 return TokError("unexpected '" + Directive + "' in file, "
4759 "no current macro definition");
4760
4761 // Exit all conditionals that are active in the current macro.
4762 while (TheCondStack.size() != ActiveMacros.back()->CondStackDepth) {
4763 TheCondState = TheCondStack.back();
4764 TheCondStack.pop_back();
4765 }
4766
4767 handleMacroExit();
4768 return false;
4769}
4770
4771/// parseDirectiveEndMacro
4772/// ::= .endm
4773/// ::= .endmacro
4774bool AsmParser::parseDirectiveEndMacro(StringRef Directive) {
4775 if (getLexer().isNot(AsmToken::EndOfStatement))
4776 return TokError("unexpected token in '" + Directive + "' directive");
4777
4778 // If we are inside a macro instantiation, terminate the current
4779 // instantiation.
4780 if (isInsideMacroInstantiation()) {
4781 handleMacroExit();
4782 return false;
4783 }
4784
4785 // Otherwise, this .endmacro is a stray entry in the file; well formed
4786 // .endmacro directives are handled during the macro definition parsing.
4787 return TokError("unexpected '" + Directive + "' in file, "
4788 "no current macro definition");
4789}
4790
4791/// parseDirectivePurgeMacro
4792/// ::= .purgem name
4793bool AsmParser::parseDirectivePurgeMacro(SMLoc DirectiveLoc) {
4795 SMLoc Loc;
4796 if (parseTokenLoc(Loc) ||
4797 check(parseIdentifier(Name), Loc,
4798 "expected identifier in '.purgem' directive") ||
4799 parseEOL())
4800 return true;
4801
4802 if (!getContext().lookupMacro(Name))
4803 return Error(DirectiveLoc, "macro '" + Name + "' is not defined");
4804
4805 getContext().undefineMacro(Name);
4806 DEBUG_WITH_TYPE("asm-macros", dbgs()
4807 << "Un-defining macro: " << Name << "\n");
4808 return false;
4809}
4810
4811/// parseDirectiveBundleAlignMode
4812/// ::= {.bundle_align_mode} expression
4813bool AsmParser::parseDirectiveBundleAlignMode() {
4814 // Expect a single argument: an expression that evaluates to a constant
4815 // in the inclusive range 0-30.
4816 SMLoc ExprLoc = getLexer().getLoc();
4817 int64_t AlignSizePow2;
4818 if (checkForValidSection() || parseAbsoluteExpression(AlignSizePow2) ||
4819 parseEOL() ||
4820 check(AlignSizePow2 < 0 || AlignSizePow2 > 30, ExprLoc,
4821 "invalid bundle alignment size (expected between 0 and 30)"))
4822 return true;
4823
4824 getStreamer().emitBundleAlignMode(Align(1ULL << AlignSizePow2));
4825 return false;
4826}
4827
4828/// parseDirectiveBundleLock
4829/// ::= {.bundle_lock} [align_to_end]
4830bool AsmParser::parseDirectiveBundleLock() {
4831 if (checkForValidSection())
4832 return true;
4833 bool AlignToEnd = false;
4834
4836 SMLoc Loc = getTok().getLoc();
4837 const char *kInvalidOptionError =
4838 "invalid option for '.bundle_lock' directive";
4839
4840 if (!parseOptionalToken(AsmToken::EndOfStatement)) {
4841 if (check(parseIdentifier(Option), Loc, kInvalidOptionError) ||
4842 check(Option != "align_to_end", Loc, kInvalidOptionError) || parseEOL())
4843 return true;
4844 AlignToEnd = true;
4845 }
4846
4847 getStreamer().emitBundleLock(AlignToEnd);
4848 return false;
4849}
4850
4851/// parseDirectiveBundleLock
4852/// ::= {.bundle_lock}
4853bool AsmParser::parseDirectiveBundleUnlock() {
4854 if (checkForValidSection() || parseEOL())
4855 return true;
4856
4857 getStreamer().emitBundleUnlock();
4858 return false;
4859}
4860
4861/// parseDirectiveSpace
4862/// ::= (.skip | .space) expression [ , expression ]
4863bool AsmParser::parseDirectiveSpace(StringRef IDVal) {
4864 SMLoc NumBytesLoc = Lexer.getLoc();
4865 const MCExpr *NumBytes;
4866 if (checkForValidSection() || parseExpression(NumBytes))
4867 return true;
4868
4869 int64_t FillExpr = 0;
4870 if (parseOptionalToken(AsmToken::Comma))
4871 if (parseAbsoluteExpression(FillExpr))
4872 return true;
4873 if (parseEOL())
4874 return true;
4875
4876 // FIXME: Sometimes the fill expr is 'nop' if it isn't supplied, instead of 0.
4877 getStreamer().emitFill(*NumBytes, FillExpr, NumBytesLoc);
4878
4879 return false;
4880}
4881
4882/// parseDirectiveDCB
4883/// ::= .dcb.{b, l, w} expression, expression
4884bool AsmParser::parseDirectiveDCB(StringRef IDVal, unsigned Size) {
4885 SMLoc NumValuesLoc = Lexer.getLoc();
4886 int64_t NumValues;
4887 if (checkForValidSection() || parseAbsoluteExpression(NumValues))
4888 return true;
4889
4890 if (NumValues < 0) {
4891 Warning(NumValuesLoc, "'" + Twine(IDVal) + "' directive with negative repeat count has no effect");
4892 return false;
4893 }
4894
4895 if (parseComma())
4896 return true;
4897
4898 const MCExpr *Value;
4899 SMLoc ExprLoc = getLexer().getLoc();
4900 if (parseExpression(Value))
4901 return true;
4902
4903 // Special case constant expressions to match code generator.
4904 if (const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Value)) {
4905 assert(Size <= 8 && "Invalid size");
4906 uint64_t IntValue = MCE->getValue();
4907 if (!isUIntN(8 * Size, IntValue) && !isIntN(8 * Size, IntValue))
4908 return Error(ExprLoc, "literal value out of range for directive");
4909 for (uint64_t i = 0, e = NumValues; i != e; ++i)
4910 getStreamer().emitIntValue(IntValue, Size);
4911 } else {
4912 for (uint64_t i = 0, e = NumValues; i != e; ++i)
4913 getStreamer().emitValue(Value, Size, ExprLoc);
4914 }
4915
4916 return parseEOL();
4917}
4918
4919/// parseDirectiveRealDCB
4920/// ::= .dcb.{d, s} expression, expression
4921bool AsmParser::parseDirectiveRealDCB(StringRef IDVal, const fltSemantics &Semantics) {
4922 SMLoc NumValuesLoc = Lexer.getLoc();
4923 int64_t NumValues;
4924 if (checkForValidSection() || parseAbsoluteExpression(NumValues))
4925 return true;
4926
4927 if (NumValues < 0) {
4928 Warning(NumValuesLoc, "'" + Twine(IDVal) + "' directive with negative repeat count has no effect");
4929 return false;
4930 }
4931
4932 if (parseComma())
4933 return true;
4934
4935 APInt AsInt;
4936 if (parseRealValue(Semantics, AsInt) || parseEOL())
4937 return true;
4938
4939 for (uint64_t i = 0, e = NumValues; i != e; ++i)
4940 getStreamer().emitIntValue(AsInt.getLimitedValue(),
4941 AsInt.getBitWidth() / 8);
4942
4943 return false;
4944}
4945
4946/// parseDirectiveDS
4947/// ::= .ds.{b, d, l, p, s, w, x} expression
4948bool AsmParser::parseDirectiveDS(StringRef IDVal, unsigned Size) {
4949 SMLoc NumValuesLoc = Lexer.getLoc();
4950 int64_t NumValues;
4951 if (checkForValidSection() || parseAbsoluteExpression(NumValues) ||
4952 parseEOL())
4953 return true;
4954
4955 if (NumValues < 0) {
4956 Warning(NumValuesLoc, "'" + Twine(IDVal) + "' directive with negative repeat count has no effect");
4957 return false;
4958 }
4959
4960 for (uint64_t i = 0, e = NumValues; i != e; ++i)
4961 getStreamer().emitFill(Size, 0);
4962
4963 return false;
4964}
4965
4966/// parseDirectiveLEB128
4967/// ::= (.sleb128 | .uleb128) [ expression (, expression)* ]
4968bool AsmParser::parseDirectiveLEB128(bool Signed) {
4969 if (checkForValidSection())
4970 return true;
4971
4972 auto parseOp = [&]() -> bool {
4973 const MCExpr *Value;
4974 if (parseExpression(Value))
4975 return true;
4976 if (Signed)
4977 getStreamer().emitSLEB128Value(Value);
4978 else
4979 getStreamer().emitULEB128Value(Value);
4980 return false;
4981 };
4982
4983 return parseMany(parseOp);
4984}
4985
4986/// parseDirectiveSymbolAttribute
4987/// ::= { ".globl", ".weak", ... } [ identifier ( , identifier )* ]
4988bool AsmParser::parseDirectiveSymbolAttribute(MCSymbolAttr Attr) {
4989 auto parseOp = [&]() -> bool {
4991 SMLoc Loc = getTok().getLoc();
4992 if (parseIdentifier(Name))
4993 return Error(Loc, "expected identifier");
4994
4995 if (discardLTOSymbol(Name))
4996 return false;
4997
4998 MCSymbol *Sym = getContext().getOrCreateSymbol(Name);
4999
5000 // Assembler local symbols don't make any sense here, except for directives
5001 // that the symbol should be tagged.
5002 if (Sym->isTemporary() && Attr != MCSA_Memtag)
5003 return Error(Loc, "non-local symbol required");
5004
5005 if (!getStreamer().emitSymbolAttribute(Sym, Attr))
5006 return Error(Loc, "unable to emit symbol attribute");
5007 return false;
5008 };
5009
5010 return parseMany(parseOp);
5011}
5012
5013/// parseDirectiveComm
5014/// ::= ( .comm | .lcomm ) identifier , size_expression [ , align_expression ]
5015bool AsmParser::parseDirectiveComm(bool IsLocal) {
5016 if (checkForValidSection())
5017 return true;
5018
5019 SMLoc IDLoc = getLexer().getLoc();
5021 if (parseIdentifier(Name))
5022 return TokError("expected identifier in directive");
5023
5024 // Handle the identifier as the key symbol.
5025 MCSymbol *Sym = getContext().getOrCreateSymbol(Name);
5026
5027 if (parseComma())
5028 return true;
5029
5030 int64_t Size;
5031 SMLoc SizeLoc = getLexer().getLoc();
5032 if (parseAbsoluteExpression(Size))
5033 return true;
5034
5035 int64_t Pow2Alignment = 0;
5036 SMLoc Pow2AlignmentLoc;
5037 if (getLexer().is(AsmToken::Comma)) {
5038 Lex();
5039 Pow2AlignmentLoc = getLexer().getLoc();
5040 if (parseAbsoluteExpression(Pow2Alignment))
5041 return true;
5042
5043 LCOMM::LCOMMType LCOMM = Lexer.getMAI().getLCOMMDirectiveAlignmentType();
5044 if (IsLocal && LCOMM == LCOMM::NoAlignment)
5045 return Error(Pow2AlignmentLoc, "alignment not supported on this target");
5046
5047 // If this target takes alignments in bytes (not log) validate and convert.
5048 if ((!IsLocal && Lexer.getMAI().getCOMMDirectiveAlignmentIsInBytes()) ||
5049 (IsLocal && LCOMM == LCOMM::ByteAlignment)) {
5050 if (!isPowerOf2_64(Pow2Alignment))
5051 return Error(Pow2AlignmentLoc, "alignment must be a power of 2");
5052 Pow2Alignment = Log2_64(Pow2Alignment);
5053 }
5054 }
5055
5056 if (parseEOL())
5057 return true;
5058
5059 // NOTE: a size of zero for a .comm should create a undefined symbol
5060 // but a size of .lcomm creates a bss symbol of size zero.
5061 if (Size < 0)
5062 return Error(SizeLoc, "size must be non-negative");
5063
5064 Sym->redefineIfPossible();
5065 if (!Sym->isUndefined())
5066 return Error(IDLoc, "invalid symbol redefinition");
5067
5068 // Create the Symbol as a common or local common with Size and Pow2Alignment
5069 if (IsLocal) {
5070 getStreamer().emitLocalCommonSymbol(Sym, Size,
5071 Align(1ULL << Pow2Alignment));
5072 return false;
5073 }
5074
5075 getStreamer().emitCommonSymbol(Sym, Size, Align(1ULL << Pow2Alignment));
5076 return false;
5077}
5078
5079/// parseDirectiveAbort
5080/// ::= .abort [... message ...]
5081bool AsmParser::parseDirectiveAbort() {
5082 // FIXME: Use loc from directive.
5083 SMLoc Loc = getLexer().getLoc();
5084
5085 StringRef Str = parseStringToEndOfStatement();
5086 if (parseEOL())
5087 return true;
5088
5089 if (Str.empty())
5090 return Error(Loc, ".abort detected. Assembly stopping.");
5091 else
5092 return Error(Loc, ".abort '" + Str + "' detected. Assembly stopping.");
5093 // FIXME: Actually abort assembly here.
5094
5095 return false;
5096}
5097
5098/// parseDirectiveInclude
5099/// ::= .include "filename"
5100bool AsmParser::parseDirectiveInclude() {
5101 // Allow the strings to have escaped octal character sequence.
5102 std::string Filename;
5103 SMLoc IncludeLoc = getTok().getLoc();
5104
5105 if (check(getTok().isNot(AsmToken::String),
5106 "expected string in '.include' directive") ||
5107 parseEscapedString(Filename) ||
5109 "unexpected token in '.include' directive") ||
5110 // Attempt to switch the lexer to the included file before consuming the
5111 // end of statement to avoid losing it when we switch.
5112 check(enterIncludeFile(Filename), IncludeLoc,
5113 "Could not find include file '" + Filename + "'"))
5114 return true;
5115
5116 return false;
5117}
5118
5119/// parseDirectiveIncbin
5120/// ::= .incbin "filename" [ , skip [ , count ] ]
5121bool AsmParser::parseDirectiveIncbin() {
5122 // Allow the strings to have escaped octal character sequence.
5123 std::string Filename;
5124 SMLoc IncbinLoc = getTok().getLoc();
5125 if (check(getTok().isNot(AsmToken::String),
5126 "expected string in '.incbin' directive") ||
5127 parseEscapedString(Filename))
5128 return true;
5129
5130 int64_t Skip = 0;
5131 const MCExpr *Count = nullptr;
5132 SMLoc SkipLoc, CountLoc;
5133 if (parseOptionalToken(AsmToken::Comma)) {
5134 // The skip expression can be omitted while specifying the count, e.g:
5135 // .incbin "filename",,4
5136 if (getTok().isNot(AsmToken::Comma)) {
5137 if (parseTokenLoc(SkipLoc) || parseAbsoluteExpression(Skip))
5138 return true;
5139 }
5140 if (parseOptionalToken(AsmToken::Comma)) {
5141 CountLoc = getTok().getLoc();
5142 if (parseExpression(Count))
5143 return true;
5144 }
5145 }
5146
5147 if (parseEOL())
5148 return true;
5149
5150 if (check(Skip < 0, SkipLoc, "skip is negative"))
5151 return true;
5152
5153 // Attempt to process the included file.
5154 if (processIncbinFile(Filename, Skip, Count, CountLoc))
5155 return Error(IncbinLoc, "Could not find incbin file '" + Filename + "'");
5156 return false;
5157}
5158
5159/// parseDirectiveIf
5160/// ::= .if{,eq,ge,gt,le,lt,ne} expression
5161bool AsmParser::parseDirectiveIf(SMLoc DirectiveLoc, DirectiveKind DirKind) {
5162 TheCondStack.push_back(TheCondState);
5163 TheCondState.TheCond = AsmCond::IfCond;
5164 if (TheCondState.Ignore) {
5165 eatToEndOfStatement();
5166 } else {
5167 int64_t ExprValue;
5168 if (parseAbsoluteExpression(ExprValue) || parseEOL())
5169 return true;
5170
5171 switch (DirKind) {
5172 default:
5173 llvm_unreachable("unsupported directive");
5174 case DK_IF:
5175 case DK_IFNE:
5176 break;
5177 case DK_IFEQ:
5178 ExprValue = ExprValue == 0;
5179 break;
5180 case DK_IFGE:
5181 ExprValue = ExprValue >= 0;
5182 break;
5183 case DK_IFGT:
5184 ExprValue = ExprValue > 0;
5185 break;
5186 case DK_IFLE:
5187 ExprValue = ExprValue <= 0;
5188 break;
5189 case DK_IFLT:
5190 ExprValue = ExprValue < 0;
5191 break;
5192 }
5193
5194 TheCondState.CondMet = ExprValue;
5195 TheCondState.Ignore = !TheCondState.CondMet;
5196 }
5197
5198 return false;
5199}
5200
5201/// parseDirectiveIfb
5202/// ::= .ifb string
5203bool AsmParser::parseDirectiveIfb(SMLoc DirectiveLoc, bool ExpectBlank) {
5204 TheCondStack.push_back(TheCondState);
5205 TheCondState.TheCond = AsmCond::IfCond;
5206
5207 if (TheCondState.Ignore) {
5208 eatToEndOfStatement();
5209 } else {
5210 StringRef Str = parseStringToEndOfStatement();
5211
5212 if (parseEOL())
5213 return true;
5214
5215 TheCondState.CondMet = ExpectBlank == Str.empty();
5216 TheCondState.Ignore = !TheCondState.CondMet;
5217 }
5218
5219 return false;
5220}
5221
5222/// parseDirectiveIfc
5223/// ::= .ifc string1, string2
5224/// ::= .ifnc string1, string2
5225bool AsmParser::parseDirectiveIfc(SMLoc DirectiveLoc, bool ExpectEqual) {
5226 TheCondStack.push_back(TheCondState);
5227 TheCondState.TheCond = AsmCond::IfCond;
5228
5229 if (TheCondState.Ignore) {
5230 eatToEndOfStatement();
5231 } else {
5232 StringRef Str1 = parseStringToComma();
5233
5234 if (parseComma())
5235 return true;
5236
5237 StringRef Str2 = parseStringToEndOfStatement();
5238
5239 if (parseEOL())
5240 return true;
5241
5242 TheCondState.CondMet = ExpectEqual == (Str1.trim() == Str2.trim());
5243 TheCondState.Ignore = !TheCondState.CondMet;
5244 }
5245
5246 return false;
5247}
5248
5249/// parseDirectiveIfeqs
5250/// ::= .ifeqs string1, string2
5251bool AsmParser::parseDirectiveIfeqs(SMLoc DirectiveLoc, bool ExpectEqual) {
5252 if (Lexer.isNot(AsmToken::String)) {
5253 if (ExpectEqual)
5254 return TokError("expected string parameter for '.ifeqs' directive");
5255 return TokError("expected string parameter for '.ifnes' directive");
5256 }
5257
5258 StringRef String1 = getTok().getStringContents();
5259 Lex();
5260
5261 if (Lexer.isNot(AsmToken::Comma)) {
5262 if (ExpectEqual)
5263 return TokError(
5264 "expected comma after first string for '.ifeqs' directive");
5265 return TokError("expected comma after first string for '.ifnes' directive");
5266 }
5267
5268 Lex();
5269
5270 if (Lexer.isNot(AsmToken::String)) {
5271 if (ExpectEqual)
5272 return TokError("expected string parameter for '.ifeqs' directive");
5273 return TokError("expected string parameter for '.ifnes' directive");
5274 }
5275
5276 StringRef String2 = getTok().getStringContents();
5277 Lex();
5278
5279 TheCondStack.push_back(TheCondState);
5280 TheCondState.TheCond = AsmCond::IfCond;
5281 TheCondState.CondMet = ExpectEqual == (String1 == String2);
5282 TheCondState.Ignore = !TheCondState.CondMet;
5283
5284 return false;
5285}
5286
5287/// parseDirectiveIfdef
5288/// ::= .ifdef symbol
5289bool AsmParser::parseDirectiveIfdef(SMLoc DirectiveLoc, bool expect_defined) {
5291 TheCondStack.push_back(TheCondState);
5292 TheCondState.TheCond = AsmCond::IfCond;
5293
5294 if (TheCondState.Ignore) {
5295 eatToEndOfStatement();
5296 } else {
5297 if (check(parseIdentifier(Name), "expected identifier after '.ifdef'") ||
5298 parseEOL())
5299 return true;
5300
5301 MCSymbol *Sym = getContext().lookupSymbol(Name);
5302
5303 if (expect_defined)
5304 TheCondState.CondMet = (Sym && !Sym->isUndefined(false));
5305 else
5306 TheCondState.CondMet = (!Sym || Sym->isUndefined(false));
5307 TheCondState.Ignore = !TheCondState.CondMet;
5308 }
5309
5310 return false;
5311}
5312
5313/// parseDirectiveElseIf
5314/// ::= .elseif expression
5315bool AsmParser::parseDirectiveElseIf(SMLoc DirectiveLoc) {
5316 if (TheCondState.TheCond != AsmCond::IfCond &&
5317 TheCondState.TheCond != AsmCond::ElseIfCond)
5318 return Error(DirectiveLoc, "Encountered a .elseif that doesn't follow an"
5319 " .if or an .elseif");
5320 TheCondState.TheCond = AsmCond::ElseIfCond;
5321
5322 bool LastIgnoreState = false;
5323 if (!TheCondStack.empty())
5324 LastIgnoreState = TheCondStack.back().Ignore;
5325 if (LastIgnoreState || TheCondState.CondMet) {
5326 TheCondState.Ignore = true;
5327 eatToEndOfStatement();
5328 } else {
5329 int64_t ExprValue;
5330 if (parseAbsoluteExpression(ExprValue))
5331 return true;
5332
5333 if (parseEOL())
5334 return true;
5335
5336 TheCondState.CondMet = ExprValue;
5337 TheCondState.Ignore = !TheCondState.CondMet;
5338 }
5339
5340 return false;
5341}
5342
5343/// parseDirectiveElse
5344/// ::= .else
5345bool AsmParser::parseDirectiveElse(SMLoc DirectiveLoc) {
5346 if (parseEOL())
5347 return true;
5348
5349 if (TheCondState.TheCond != AsmCond::IfCond &&
5350 TheCondState.TheCond != AsmCond::ElseIfCond)
5351 return Error(DirectiveLoc, "Encountered a .else that doesn't follow "
5352 " an .if or an .elseif");
5353 TheCondState.TheCond = AsmCond::ElseCond;
5354 bool LastIgnoreState = false;
5355 if (!TheCondStack.empty())
5356 LastIgnoreState = TheCondStack.back().Ignore;
5357 if (LastIgnoreState || TheCondState.CondMet)
5358 TheCondState.Ignore = true;
5359 else
5360 TheCondState.Ignore = false;
5361
5362 return false;
5363}
5364
5365/// parseDirectiveEnd
5366/// ::= .end
5367bool AsmParser::parseDirectiveEnd(SMLoc DirectiveLoc) {
5368 if (parseEOL())
5369 return true;
5370
5371 while (Lexer.isNot(AsmToken::Eof))
5372 Lexer.Lex();
5373
5374 return false;
5375}
5376
5377/// parseDirectiveError
5378/// ::= .err
5379/// ::= .error [string]
5380bool AsmParser::parseDirectiveError(SMLoc L, bool WithMessage) {
5381 if (!TheCondStack.empty()) {
5382 if (TheCondStack.back().Ignore) {
5383 eatToEndOfStatement();
5384 return false;
5385 }
5386 }
5387
5388 if (!WithMessage)
5389 return Error(L, ".err encountered");
5390
5391 StringRef Message = ".error directive invoked in source file";
5392 if (Lexer.isNot(AsmToken::EndOfStatement)) {
5393 if (Lexer.isNot(AsmToken::String))
5394 return TokError(".error argument must be a string");
5395
5396 Message = getTok().getStringContents();
5397 Lex();
5398 }
5399
5400 return Error(L, Message);
5401}
5402
5403/// parseDirectiveWarning
5404/// ::= .warning [string]
5405bool AsmParser::parseDirectiveWarning(SMLoc L) {
5406 if (!TheCondStack.empty()) {
5407 if (TheCondStack.back().Ignore) {
5408 eatToEndOfStatement();
5409 return false;
5410 }
5411 }
5412
5413 StringRef Message = ".warning directive invoked in source file";
5414
5415 if (!parseOptionalToken(AsmToken::EndOfStatement)) {
5416 if (Lexer.isNot(AsmToken::String))
5417 return TokError(".warning argument must be a string");
5418
5419 Message = getTok().getStringContents();
5420 Lex();
5421 if (parseEOL())
5422 return true;
5423 }
5424
5425 return Warning(L, Message);
5426}
5427
5428/// parseDirectiveEndIf
5429/// ::= .endif
5430bool AsmParser::parseDirectiveEndIf(SMLoc DirectiveLoc) {
5431 if (parseEOL())
5432 return true;
5433
5434 if ((TheCondState.TheCond == AsmCond::NoCond) || TheCondStack.empty())
5435 return Error(DirectiveLoc, "Encountered a .endif that doesn't follow "
5436 "an .if or .else");
5437 if (!TheCondStack.empty()) {
5438 TheCondState = TheCondStack.back();
5439 TheCondStack.pop_back();
5440 }
5441
5442 return false;
5443}
5444
5445void AsmParser::initializeDirectiveKindMap() {
5446 /* Lookup will be done with the directive
5447 * converted to lower case, so all these
5448 * keys should be lower case.
5449 * (target specific directives are handled
5450 * elsewhere)
5451 */
5452 DirectiveKindMap[".set"] = DK_SET;
5453 DirectiveKindMap[".equ"] = DK_EQU;
5454 DirectiveKindMap[".equiv"] = DK_EQUIV;
5455 DirectiveKindMap[".ascii"] = DK_ASCII;
5456 DirectiveKindMap[".asciz"] = DK_ASCIZ;
5457 DirectiveKindMap[".string"] = DK_STRING;
5458 DirectiveKindMap[".byte"] = DK_BYTE;
5459 DirectiveKindMap[".short"] = DK_SHORT;
5460 DirectiveKindMap[".value"] = DK_VALUE;
5461 DirectiveKindMap[".2byte"] = DK_2BYTE;
5462 DirectiveKindMap[".long"] = DK_LONG;
5463 DirectiveKindMap[".int"] = DK_INT;
5464 DirectiveKindMap[".4byte"] = DK_4BYTE;
5465 DirectiveKindMap[".quad"] = DK_QUAD;
5466 DirectiveKindMap[".8byte"] = DK_8BYTE;
5467 DirectiveKindMap[".octa"] = DK_OCTA;
5468 DirectiveKindMap[".single"] = DK_SINGLE;
5469 DirectiveKindMap[".float"] = DK_FLOAT;
5470 DirectiveKindMap[".double"] = DK_DOUBLE;
5471 DirectiveKindMap[".align"] = DK_ALIGN;
5472 DirectiveKindMap[".align32"] = DK_ALIGN32;
5473 DirectiveKindMap[".balign"] = DK_BALIGN;
5474 DirectiveKindMap[".balignw"] = DK_BALIGNW;
5475 DirectiveKindMap[".balignl"] = DK_BALIGNL;
5476 DirectiveKindMap[".p2align"] = DK_P2ALIGN;
5477 DirectiveKindMap[".p2alignw"] = DK_P2ALIGNW;
5478 DirectiveKindMap[".p2alignl"] = DK_P2ALIGNL;
5479 DirectiveKindMap[".org"] = DK_ORG;
5480 DirectiveKindMap[".fill"] = DK_FILL;
5481 DirectiveKindMap[".zero"] = DK_ZERO;
5482 DirectiveKindMap[".extern"] = DK_EXTERN;
5483 DirectiveKindMap[".globl"] = DK_GLOBL;
5484 DirectiveKindMap[".global"] = DK_GLOBAL;
5485 DirectiveKindMap[".lazy_reference"] = DK_LAZY_REFERENCE;
5486 DirectiveKindMap[".no_dead_strip"] = DK_NO_DEAD_STRIP;
5487 DirectiveKindMap[".symbol_resolver"] = DK_SYMBOL_RESOLVER;
5488 DirectiveKindMap[".private_extern"] = DK_PRIVATE_EXTERN;
5489 DirectiveKindMap[".reference"] = DK_REFERENCE;
5490 DirectiveKindMap[".weak_definition"] = DK_WEAK_DEFINITION;
5491 DirectiveKindMap[".weak_reference"] = DK_WEAK_REFERENCE;
5492 DirectiveKindMap[".weak_def_can_be_hidden"] = DK_WEAK_DEF_CAN_BE_HIDDEN;
5493 DirectiveKindMap[".cold"] = DK_COLD;
5494 DirectiveKindMap[".comm"] = DK_COMM;
5495 DirectiveKindMap[".common"] = DK_COMMON;
5496 DirectiveKindMap[".lcomm"] = DK_LCOMM;
5497 DirectiveKindMap[".abort"] = DK_ABORT;
5498 DirectiveKindMap[".include"] = DK_INCLUDE;
5499 DirectiveKindMap[".incbin"] = DK_INCBIN;
5500 DirectiveKindMap[".code16"] = DK_CODE16;
5501 DirectiveKindMap[".code16gcc"] = DK_CODE16GCC;
5502 DirectiveKindMap[".rept"] = DK_REPT;
5503 DirectiveKindMap[".rep"] = DK_REPT;
5504 DirectiveKindMap[".irp"] = DK_IRP;
5505 DirectiveKindMap[".irpc"] = DK_IRPC;
5506 DirectiveKindMap[".endr"] = DK_ENDR;
5507 DirectiveKindMap[".bundle_align_mode"] = DK_BUNDLE_ALIGN_MODE;
5508 DirectiveKindMap[".bundle_lock"] = DK_BUNDLE_LOCK;
5509 DirectiveKindMap[".bundle_unlock"] = DK_BUNDLE_UNLOCK;
5510 DirectiveKindMap[".if"] = DK_IF;
5511 DirectiveKindMap[".ifeq"] = DK_IFEQ;
5512 DirectiveKindMap[".ifge"] = DK_IFGE;
5513 DirectiveKindMap[".ifgt"] = DK_IFGT;
5514 DirectiveKindMap[".ifle"] = DK_IFLE;
5515 DirectiveKindMap[".iflt"] = DK_IFLT;
5516 DirectiveKindMap[".ifne"] = DK_IFNE;
5517 DirectiveKindMap[".ifb"] = DK_IFB;
5518 DirectiveKindMap[".ifnb"] = DK_IFNB;
5519 DirectiveKindMap[".ifc"] = DK_IFC;
5520 DirectiveKindMap[".ifeqs"] = DK_IFEQS;
5521 DirectiveKindMap[".ifnc"] = DK_IFNC;
5522 DirectiveKindMap[".ifnes"] = DK_IFNES;
5523 DirectiveKindMap[".ifdef"] = DK_IFDEF;
5524 DirectiveKindMap[".ifndef"] = DK_IFNDEF;
5525 DirectiveKindMap[".ifnotdef"] = DK_IFNOTDEF;
5526 DirectiveKindMap[".elseif"] = DK_ELSEIF;
5527 DirectiveKindMap[".else"] = DK_ELSE;
5528 DirectiveKindMap[".end"] = DK_END;
5529 DirectiveKindMap[".endif"] = DK_ENDIF;
5530 DirectiveKindMap[".skip"] = DK_SKIP;
5531 DirectiveKindMap[".space"] = DK_SPACE;
5532 DirectiveKindMap[".file"] = DK_FILE;
5533 DirectiveKindMap[".line"] = DK_LINE;
5534 DirectiveKindMap[".loc"] = DK_LOC;
5535 DirectiveKindMap[".stabs"] = DK_STABS;
5536 DirectiveKindMap[".cv_file"] = DK_CV_FILE;
5537 DirectiveKindMap[".cv_func_id"] = DK_CV_FUNC_ID;
5538 DirectiveKindMap[".cv_loc"] = DK_CV_LOC;
5539 DirectiveKindMap[".cv_linetable"] = DK_CV_LINETABLE;
5540 DirectiveKindMap[".cv_inline_linetable"] = DK_CV_INLINE_LINETABLE;
5541 DirectiveKindMap[".cv_inline_site_id"] = DK_CV_INLINE_SITE_ID;
5542 DirectiveKindMap[".cv_def_range"] = DK_CV_DEF_RANGE;
5543 DirectiveKindMap[".cv_string"] = DK_CV_STRING;
5544 DirectiveKindMap[".cv_stringtable"] = DK_CV_STRINGTABLE;
5545 DirectiveKindMap[".cv_filechecksums"] = DK_CV_FILECHECKSUMS;
5546 DirectiveKindMap[".cv_filechecksumoffset"] = DK_CV_FILECHECKSUM_OFFSET;
5547 DirectiveKindMap[".cv_fpo_data"] = DK_CV_FPO_DATA;
5548 DirectiveKindMap[".sleb128"] = DK_SLEB128;
5549 DirectiveKindMap[".uleb128"] = DK_ULEB128;
5550 DirectiveKindMap[".cfi_sections"] = DK_CFI_SECTIONS;
5551 DirectiveKindMap[".cfi_startproc"] = DK_CFI_STARTPROC;
5552 DirectiveKindMap[".cfi_endproc"] = DK_CFI_ENDPROC;
5553 DirectiveKindMap[".cfi_def_cfa"] = DK_CFI_DEF_CFA;
5554 DirectiveKindMap[".cfi_def_cfa_offset"] = DK_CFI_DEF_CFA_OFFSET;
5555 DirectiveKindMap[".cfi_adjust_cfa_offset"] = DK_CFI_ADJUST_CFA_OFFSET;
5556 DirectiveKindMap[".cfi_def_cfa_register"] = DK_CFI_DEF_CFA_REGISTER;
5557 DirectiveKindMap[".cfi_llvm_def_aspace_cfa"] = DK_CFI_LLVM_DEF_ASPACE_CFA;
5558 DirectiveKindMap[".cfi_offset"] = DK_CFI_OFFSET;
5559 DirectiveKindMap[".cfi_rel_offset"] = DK_CFI_REL_OFFSET;
5560 DirectiveKindMap[".cfi_personality"] = DK_CFI_PERSONALITY;
5561 DirectiveKindMap[".cfi_lsda"] = DK_CFI_LSDA;
5562 DirectiveKindMap[".cfi_remember_state"] = DK_CFI_REMEMBER_STATE;
5563 DirectiveKindMap[".cfi_restore_state"] = DK_CFI_RESTORE_STATE;
5564 DirectiveKindMap[".cfi_same_value"] = DK_CFI_SAME_VALUE;
5565 DirectiveKindMap[".cfi_restore"] = DK_CFI_RESTORE;
5566 DirectiveKindMap[".cfi_escape"] = DK_CFI_ESCAPE;
5567