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"
18#include "llvm/ADT/SmallString.h"
19#include "llvm/ADT/SmallVector.h"
20#include "llvm/ADT/StringExtras.h"
21#include "llvm/ADT/StringMap.h"
22#include "llvm/ADT/StringRef.h"
23#include "llvm/ADT/Twine.h"
24#include "llvm/BinaryFormat/Dwarf.h"
25#include "llvm/DebugInfo/CodeView/SymbolRecord.h"
26#include "llvm/MC/MCAsmInfo.h"
27#include "llvm/MC/MCCodeView.h"
28#include "llvm/MC/MCContext.h"
29#include "llvm/MC/MCDirectives.h"
30#include "llvm/MC/MCDwarf.h"
31#include "llvm/MC/MCExpr.h"
32#include "llvm/MC/MCInstPrinter.h"
33#include "llvm/MC/MCInstrDesc.h"
34#include "llvm/MC/MCInstrInfo.h"
35#include "llvm/MC/MCParser/AsmCond.h"
36#include "llvm/MC/MCParser/AsmLexer.h"
37#include "llvm/MC/MCParser/MCAsmParser.h"
38#include "llvm/MC/MCParser/MCAsmParserExtension.h"
39#include "llvm/MC/MCParser/MCAsmParserUtils.h"
40#include "llvm/MC/MCParser/MCParsedAsmOperand.h"
41#include "llvm/MC/MCParser/MCTargetAsmParser.h"
42#include "llvm/MC/MCRegisterInfo.h"
43#include "llvm/MC/MCSection.h"
44#include "llvm/MC/MCStreamer.h"
45#include "llvm/MC/MCSymbol.h"
46#include "llvm/MC/MCSymbolMachO.h"
47#include "llvm/MC/MCTargetOptions.h"
48#include "llvm/MC/MCValue.h"
49#include "llvm/Support/Casting.h"
50#include "llvm/Support/CommandLine.h"
51#include "llvm/Support/ErrorHandling.h"
52#include "llvm/Support/MD5.h"
53#include "llvm/Support/MathExtras.h"
54#include "llvm/Support/MemoryBuffer.h"
55#include "llvm/Support/SMLoc.h"
56#include "llvm/Support/SourceMgr.h"
57#include "llvm/Support/raw_ostream.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
75MCAsmParserSemaCallback::~MCAsmParserSemaCallback() = default;
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.
101 SmallVector<std::unique_ptr<MCParsedAsmOperand>, 8> ParsedOperands;
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 SourceMgr::DiagHandlerTy SavedDiagHandler;
120 void *SavedDiagContext;
121 std::unique_ptr<MCAsmParserExtension> PlatformParser;
122 SMLoc StartTokLoc;
123 std::optional<SMLoc> CFIStartProcLoc;
124
125 /// This is the current buffer index we're lexing from as managed by the
126 /// SourceMgr object.
127 unsigned CurBuffer;
128
129 AsmCond TheCondState;
130 std::vector<AsmCond> TheCondStack;
131
132 /// maps directive names to handler methods in parser
133 /// extensions. Extensions register themselves in this map by calling
134 /// addDirectiveHandler.
135 StringMap<ExtensionDirectiveHandler> ExtensionDirectiveMap;
136
137 /// Stack of active macro instantiations.
138 std::vector<MacroInstantiation*> ActiveMacros;
139
140 /// List of bodies of anonymous macros.
141 std::deque<MCAsmMacro> MacroLikeBodies;
142
143 /// Boolean tracking whether macro substitution is enabled.
144 unsigned MacrosEnabledFlag : 1;
145
146 /// Keeps track of how many .macro's have been instantiated.
147 unsigned NumOfMacroInstantiations = 0;
148
149 /// The values from the last parsed cpp hash file line comment if any.
150 struct CppHashInfoTy {
151 StringRef Filename;
152 int64_t LineNumber;
153 SMLoc Loc;
154 unsigned Buf;
155 CppHashInfoTy() : LineNumber(0), Buf(0) {}
156 };
157 CppHashInfoTy CppHashInfo;
158
159 /// Have we seen any file line comment.
160 bool HadCppHashFilename = false;
161
162 /// List of forward directional labels for diagnosis at the end.
163 SmallVector<std::tuple<SMLoc, CppHashInfoTy, MCSymbol *>, 4> DirLabels;
164
165 SmallSet<StringRef, 2> LTODiscardSymbols;
166
167 /// AssemblerDialect. ~OU means unset value and use value provided by MAI.
168 unsigned AssemblerDialect = ~0U;
169
170 /// is Darwin compatibility enabled?
171 bool IsDarwin = false;
172
173 /// Are we parsing ms-style inline assembly?
174 bool ParsingMSInlineAsm = false;
175
176 /// Did we already inform the user about inconsistent MD5 usage?
177 bool ReportedInconsistentMD5 = false;
178
179 // Is alt macro mode enabled.
180 bool AltMacroMode = false;
181
182protected:
183 virtual bool parseStatement(ParseStatementInfo &Info,
184 MCAsmParserSemaCallback *SI);
185
186 /// This routine uses the target specific ParseInstruction function to
187 /// parse an instruction into Operands, and then call the target specific
188 /// MatchAndEmit function to match and emit the instruction.
189 bool parseAndMatchAndEmitTargetInstruction(ParseStatementInfo &Info,
190 StringRef IDVal, AsmToken ID,
191 SMLoc IDLoc);
192
193 /// Should we emit DWARF describing this assembler source? (Returns false if
194 /// the source has .file directives, which means we don't want to generate
195 /// info describing the assembler source itself.)
196 bool enabledGenDwarfForAssembly();
197
198public:
199 AsmParser(SourceMgr &SM, MCContext &Ctx, MCStreamer &Out,
200 const MCAsmInfo &MAI, unsigned CB);
201 AsmParser(const AsmParser &) = delete;
202 AsmParser &operator=(const AsmParser &) = delete;
203 ~AsmParser() override;
204
205 bool Run(bool NoInitialTextSection, bool NoFinalize = false) override;
206
207 void addDirectiveHandler(StringRef Directive,
208 ExtensionDirectiveHandler Handler) override {
209 ExtensionDirectiveMap[Directive] = Handler;
210 }
211
212 void addAliasForDirective(StringRef Directive, StringRef Alias) override {
213 DirectiveKindMap[Directive.lower()] = DirectiveKindMap[Alias.lower()];
214 }
215
216 /// @name MCAsmParser Interface
217 /// {
218
219 CodeViewContext &getCVContext() { return Ctx.getCVContext(); }
220
221 unsigned getAssemblerDialect() override {
222 if (AssemblerDialect == ~0U)
223 return MAI.getAssemblerDialect();
224 else
225 return AssemblerDialect;
226 }
227 void setAssemblerDialect(unsigned i) override {
228 AssemblerDialect = i;
229 }
230
231 void Note(SMLoc L, const Twine &Msg, SMRange Range = std::nullopt) override;
232 bool Warning(SMLoc L, const Twine &Msg,
233 SMRange Range = std::nullopt) override;
234 bool printError(SMLoc L, const Twine &Msg,
235 SMRange Range = std::nullopt) override;
236
237 const AsmToken &Lex() override;
238
239 void setParsingMSInlineAsm(bool V) override {
240 ParsingMSInlineAsm = V;
241 // When parsing MS inline asm, we must lex 0b1101 and 0ABCH as binary and
242 // hex integer literals.
243 Lexer.setLexMasmIntegers(V);
244 }
245 bool isParsingMSInlineAsm() override { return ParsingMSInlineAsm; }
246
247 bool discardLTOSymbol(StringRef Name) const override {
248 return LTODiscardSymbols.contains(V: Name);
249 }
250
251 bool parseMSInlineAsm(std::string &AsmString, unsigned &NumOutputs,
252 unsigned &NumInputs,
253 SmallVectorImpl<std::pair<void *, bool>> &OpDecls,
254 SmallVectorImpl<std::string> &Constraints,
255 SmallVectorImpl<std::string> &Clobbers,
256 const MCInstrInfo *MII, MCInstPrinter *IP,
257 MCAsmParserSemaCallback &SI) override;
258
259 bool parseExpression(const MCExpr *&Res);
260 bool parseExpression(const MCExpr *&Res, SMLoc &EndLoc) override;
261 bool parsePrimaryExpr(const MCExpr *&Res, SMLoc &EndLoc,
262 AsmTypeInfo *TypeInfo) override;
263 bool parseParenExpression(const MCExpr *&Res, SMLoc &EndLoc) override;
264 bool parseAbsoluteExpression(int64_t &Res) override;
265
266 /// Parse a floating point expression using the float \p Semantics
267 /// and set \p Res to the value.
268 bool parseRealValue(const fltSemantics &Semantics, APInt &Res);
269
270 /// Parse an identifier or string (as a quoted identifier)
271 /// and set \p Res to the identifier contents.
272 bool parseIdentifier(StringRef &Res) override;
273 void eatToEndOfStatement() override;
274
275 bool checkForValidSection() override;
276
277 /// }
278
279private:
280 bool parseCurlyBlockScope(SmallVectorImpl<AsmRewrite>& AsmStrRewrites);
281 bool parseCppHashLineFilenameComment(SMLoc L, bool SaveLocInfo = true);
282
283 void checkForBadMacro(SMLoc DirectiveLoc, StringRef Name, StringRef Body,
284 ArrayRef<MCAsmMacroParameter> Parameters);
285 bool expandMacro(raw_svector_ostream &OS, MCAsmMacro &Macro,
286 ArrayRef<MCAsmMacroParameter> Parameters,
287 ArrayRef<MCAsmMacroArgument> A, bool EnableAtPseudoVariable);
288
289 /// Are macros enabled in the parser?
290 bool areMacrosEnabled() {return MacrosEnabledFlag;}
291
292 /// Control a flag in the parser that enables or disables macros.
293 void setMacrosEnabled(bool Flag) {MacrosEnabledFlag = Flag;}
294
295 /// Are we inside a macro instantiation?
296 bool isInsideMacroInstantiation() {return !ActiveMacros.empty();}
297
298 /// Handle entry to macro instantiation.
299 ///
300 /// \param M The macro.
301 /// \param NameLoc Instantiation location.
302 bool handleMacroEntry(MCAsmMacro *M, SMLoc NameLoc);
303
304 /// Handle exit from macro instantiation.
305 void handleMacroExit();
306
307 /// Extract AsmTokens for a macro argument.
308 bool parseMacroArgument(MCAsmMacroArgument &MA, bool Vararg);
309
310 /// Parse all macro arguments for a given macro.
311 bool parseMacroArguments(const MCAsmMacro *M, MCAsmMacroArguments &A);
312
313 void printMacroInstantiations();
314 void printMessage(SMLoc Loc, SourceMgr::DiagKind Kind, const Twine &Msg,
315 SMRange Range = std::nullopt) const {
316 ArrayRef<SMRange> Ranges(Range);
317 SrcMgr.PrintMessage(Loc, Kind, Msg, Ranges);
318 }
319 static void DiagHandler(const SMDiagnostic &Diag, void *Context);
320
321 /// Enter the specified file. This returns true on failure.
322 bool enterIncludeFile(const std::string &Filename);
323
324 /// Process the specified file for the .incbin directive.
325 /// This returns true on failure.
326 bool processIncbinFile(const std::string &Filename, int64_t Skip = 0,
327 const MCExpr *Count = nullptr, SMLoc Loc = SMLoc());
328
329 /// Reset the current lexer position to that given by \p Loc. The
330 /// current token is not set; clients should ensure Lex() is called
331 /// subsequently.
332 ///
333 /// \param InBuffer If not 0, should be the known buffer id that contains the
334 /// location.
335 void jumpToLoc(SMLoc Loc, unsigned InBuffer = 0);
336
337 /// Parse up to the end of statement and a return the contents from the
338 /// current token until the end of the statement; the current token on exit
339 /// will be either the EndOfStatement or EOF.
340 StringRef parseStringToEndOfStatement() override;
341
342 /// Parse until the end of a statement or a comma is encountered,
343 /// return the contents from the current token up to the end or comma.
344 StringRef parseStringToComma();
345
346 enum class AssignmentKind {
347 Set,
348 Equiv,
349 Equal,
350 LTOSetConditional,
351 };
352
353 bool parseAssignment(StringRef Name, AssignmentKind Kind);
354
355 unsigned getBinOpPrecedence(AsmToken::TokenKind K,
356 MCBinaryExpr::Opcode &Kind);
357
358 bool parseBinOpRHS(unsigned Precedence, const MCExpr *&Res, SMLoc &EndLoc);
359 bool parseParenExpr(const MCExpr *&Res, SMLoc &EndLoc);
360 bool parseBracketExpr(const MCExpr *&Res, SMLoc &EndLoc);
361
362 bool parseRegisterOrRegisterNumber(int64_t &Register, SMLoc DirectiveLoc);
363
364 bool parseCVFunctionId(int64_t &FunctionId, StringRef DirectiveName);
365 bool parseCVFileId(int64_t &FileId, StringRef DirectiveName);
366
367 // Generic (target and platform independent) directive parsing.
368 enum DirectiveKind {
369 DK_NO_DIRECTIVE, // Placeholder
370 DK_SET,
371 DK_EQU,
372 DK_EQUIV,
373 DK_ASCII,
374 DK_ASCIZ,
375 DK_STRING,
376 DK_BYTE,
377 DK_SHORT,
378 DK_RELOC,
379 DK_VALUE,
380 DK_2BYTE,
381 DK_LONG,
382 DK_INT,
383 DK_4BYTE,
384 DK_QUAD,
385 DK_8BYTE,
386 DK_OCTA,
387 DK_DC,
388 DK_DC_A,
389 DK_DC_B,
390 DK_DC_D,
391 DK_DC_L,
392 DK_DC_S,
393 DK_DC_W,
394 DK_DC_X,
395 DK_DCB,
396 DK_DCB_B,
397 DK_DCB_D,
398 DK_DCB_L,
399 DK_DCB_S,
400 DK_DCB_W,
401 DK_DCB_X,
402 DK_DS,
403 DK_DS_B,
404 DK_DS_D,
405 DK_DS_L,
406 DK_DS_P,
407 DK_DS_S,
408 DK_DS_W,
409 DK_DS_X,
410 DK_SINGLE,
411 DK_FLOAT,
412 DK_DOUBLE,
413 DK_ALIGN,
414 DK_ALIGN32,
415 DK_BALIGN,
416 DK_BALIGNW,
417 DK_BALIGNL,
418 DK_P2ALIGN,
419 DK_P2ALIGNW,
420 DK_P2ALIGNL,
421 DK_ORG,
422 DK_FILL,
423 DK_ENDR,
424 DK_BUNDLE_ALIGN_MODE,
425 DK_BUNDLE_LOCK,
426 DK_BUNDLE_UNLOCK,
427 DK_ZERO,
428 DK_EXTERN,
429 DK_GLOBL,
430 DK_GLOBAL,
431 DK_LAZY_REFERENCE,
432 DK_NO_DEAD_STRIP,
433 DK_SYMBOL_RESOLVER,
434 DK_PRIVATE_EXTERN,
435 DK_REFERENCE,
436 DK_WEAK_DEFINITION,
437 DK_WEAK_REFERENCE,
438 DK_WEAK_DEF_CAN_BE_HIDDEN,
439 DK_COLD,
440 DK_COMM,
441 DK_COMMON,
442 DK_LCOMM,
443 DK_ABORT,
444 DK_INCLUDE,
445 DK_INCBIN,
446 DK_CODE16,
447 DK_CODE16GCC,
448 DK_REPT,
449 DK_IRP,
450 DK_IRPC,
451 DK_IF,
452 DK_IFEQ,
453 DK_IFGE,
454 DK_IFGT,
455 DK_IFLE,
456 DK_IFLT,
457 DK_IFNE,
458 DK_IFB,
459 DK_IFNB,
460 DK_IFC,
461 DK_IFEQS,
462 DK_IFNC,
463 DK_IFNES,
464 DK_IFDEF,
465 DK_IFNDEF,
466 DK_IFNOTDEF,
467 DK_ELSEIF,
468 DK_ELSE,
469 DK_ENDIF,
470 DK_SPACE,
471 DK_SKIP,
472 DK_FILE,
473 DK_LINE,
474 DK_LOC,
475 DK_LOC_LABEL,
476 DK_STABS,
477 DK_CV_FILE,
478 DK_CV_FUNC_ID,
479 DK_CV_INLINE_SITE_ID,
480 DK_CV_LOC,
481 DK_CV_LINETABLE,
482 DK_CV_INLINE_LINETABLE,
483 DK_CV_DEF_RANGE,
484 DK_CV_STRINGTABLE,
485 DK_CV_STRING,
486 DK_CV_FILECHECKSUMS,
487 DK_CV_FILECHECKSUM_OFFSET,
488 DK_CV_FPO_DATA,
489 DK_CFI_SECTIONS,
490 DK_CFI_STARTPROC,
491 DK_CFI_ENDPROC,
492 DK_CFI_DEF_CFA,
493 DK_CFI_DEF_CFA_OFFSET,
494 DK_CFI_ADJUST_CFA_OFFSET,
495 DK_CFI_DEF_CFA_REGISTER,
496 DK_CFI_LLVM_DEF_ASPACE_CFA,
497 DK_CFI_OFFSET,
498 DK_CFI_REL_OFFSET,
499 DK_CFI_PERSONALITY,
500 DK_CFI_LSDA,
501 DK_CFI_REMEMBER_STATE,
502 DK_CFI_RESTORE_STATE,
503 DK_CFI_SAME_VALUE,
504 DK_CFI_RESTORE,
505 DK_CFI_ESCAPE,
506 DK_CFI_RETURN_COLUMN,
507 DK_CFI_SIGNAL_FRAME,
508 DK_CFI_UNDEFINED,
509 DK_CFI_REGISTER,
510 DK_CFI_WINDOW_SAVE,
511 DK_CFI_LABEL,
512 DK_CFI_B_KEY_FRAME,
513 DK_CFI_VAL_OFFSET,
514 DK_MACROS_ON,
515 DK_MACROS_OFF,
516 DK_ALTMACRO,
517 DK_NOALTMACRO,
518 DK_MACRO,
519 DK_EXITM,
520 DK_ENDM,
521 DK_ENDMACRO,
522 DK_PURGEM,
523 DK_SLEB128,
524 DK_ULEB128,
525 DK_ERR,
526 DK_ERROR,
527 DK_WARNING,
528 DK_PRINT,
529 DK_ADDRSIG,
530 DK_ADDRSIG_SYM,
531 DK_PSEUDO_PROBE,
532 DK_LTO_DISCARD,
533 DK_LTO_SET_CONDITIONAL,
534 DK_CFI_MTE_TAGGED_FRAME,
535 DK_MEMTAG,
536 DK_END
537 };
538
539 /// Maps directive name --> DirectiveKind enum, for
540 /// directives parsed by this class.
541 StringMap<DirectiveKind> DirectiveKindMap;
542
543 // Codeview def_range type parsing.
544 enum CVDefRangeType {
545 CVDR_DEFRANGE = 0, // Placeholder
546 CVDR_DEFRANGE_REGISTER,
547 CVDR_DEFRANGE_FRAMEPOINTER_REL,
548 CVDR_DEFRANGE_SUBFIELD_REGISTER,
549 CVDR_DEFRANGE_REGISTER_REL
550 };
551
552 /// Maps Codeview def_range types --> CVDefRangeType enum, for
553 /// Codeview def_range types parsed by this class.
554 StringMap<CVDefRangeType> CVDefRangeTypeMap;
555
556 // ".ascii", ".asciz", ".string"
557 bool parseDirectiveAscii(StringRef IDVal, bool ZeroTerminated);
558 bool parseDirectiveReloc(SMLoc DirectiveLoc); // ".reloc"
559 bool parseDirectiveValue(StringRef IDVal,
560 unsigned Size); // ".byte", ".long", ...
561 bool parseDirectiveOctaValue(StringRef IDVal); // ".octa", ...
562 bool parseDirectiveRealValue(StringRef IDVal,
563 const fltSemantics &); // ".single", ...
564 bool parseDirectiveFill(); // ".fill"
565 bool parseDirectiveZero(); // ".zero"
566 // ".set", ".equ", ".equiv", ".lto_set_conditional"
567 bool parseDirectiveSet(StringRef IDVal, AssignmentKind Kind);
568 bool parseDirectiveOrg(); // ".org"
569 // ".align{,32}", ".p2align{,w,l}"
570 bool parseDirectiveAlign(bool IsPow2, unsigned ValueSize);
571
572 // ".file", ".line", ".loc", ".loc_label", ".stabs"
573 bool parseDirectiveFile(SMLoc DirectiveLoc);
574 bool parseDirectiveLine();
575 bool parseDirectiveLoc();
576 bool parseDirectiveLocLabel(SMLoc DirectiveLoc);
577 bool parseDirectiveStabs();
578
579 // ".cv_file", ".cv_func_id", ".cv_inline_site_id", ".cv_loc", ".cv_linetable",
580 // ".cv_inline_linetable", ".cv_def_range", ".cv_string"
581 bool parseDirectiveCVFile();
582 bool parseDirectiveCVFuncId();
583 bool parseDirectiveCVInlineSiteId();
584 bool parseDirectiveCVLoc();
585 bool parseDirectiveCVLinetable();
586 bool parseDirectiveCVInlineLinetable();
587 bool parseDirectiveCVDefRange();
588 bool parseDirectiveCVString();
589 bool parseDirectiveCVStringTable();
590 bool parseDirectiveCVFileChecksums();
591 bool parseDirectiveCVFileChecksumOffset();
592 bool parseDirectiveCVFPOData();
593
594 // .cfi directives
595 bool parseDirectiveCFIRegister(SMLoc DirectiveLoc);
596 bool parseDirectiveCFIWindowSave(SMLoc DirectiveLoc);
597 bool parseDirectiveCFISections();
598 bool parseDirectiveCFIStartProc();
599 bool parseDirectiveCFIEndProc();
600 bool parseDirectiveCFIDefCfaOffset(SMLoc DirectiveLoc);
601 bool parseDirectiveCFIDefCfa(SMLoc DirectiveLoc);
602 bool parseDirectiveCFIAdjustCfaOffset(SMLoc DirectiveLoc);
603 bool parseDirectiveCFIDefCfaRegister(SMLoc DirectiveLoc);
604 bool parseDirectiveCFILLVMDefAspaceCfa(SMLoc DirectiveLoc);
605 bool parseDirectiveCFIOffset(SMLoc DirectiveLoc);
606 bool parseDirectiveCFIRelOffset(SMLoc DirectiveLoc);
607 bool parseDirectiveCFIPersonalityOrLsda(bool IsPersonality);
608 bool parseDirectiveCFIRememberState(SMLoc DirectiveLoc);
609 bool parseDirectiveCFIRestoreState(SMLoc DirectiveLoc);
610 bool parseDirectiveCFISameValue(SMLoc DirectiveLoc);
611 bool parseDirectiveCFIRestore(SMLoc DirectiveLoc);
612 bool parseDirectiveCFIEscape(SMLoc DirectiveLoc);
613 bool parseDirectiveCFIReturnColumn(SMLoc DirectiveLoc);
614 bool parseDirectiveCFISignalFrame(SMLoc DirectiveLoc);
615 bool parseDirectiveCFIUndefined(SMLoc DirectiveLoc);
616 bool parseDirectiveCFILabel(SMLoc DirectiveLoc);
617 bool parseDirectiveCFIValOffset(SMLoc DirectiveLoc);
618
619 // macro directives
620 bool parseDirectivePurgeMacro(SMLoc DirectiveLoc);
621 bool parseDirectiveExitMacro(StringRef Directive);
622 bool parseDirectiveEndMacro(StringRef Directive);
623 bool parseDirectiveMacro(SMLoc DirectiveLoc);
624 bool parseDirectiveMacrosOnOff(StringRef Directive);
625 // alternate macro mode directives
626 bool parseDirectiveAltmacro(StringRef Directive);
627 // ".bundle_align_mode"
628 bool parseDirectiveBundleAlignMode();
629 // ".bundle_lock"
630 bool parseDirectiveBundleLock();
631 // ".bundle_unlock"
632 bool parseDirectiveBundleUnlock();
633
634 // ".space", ".skip"
635 bool parseDirectiveSpace(StringRef IDVal);
636
637 // ".dcb"
638 bool parseDirectiveDCB(StringRef IDVal, unsigned Size);
639 bool parseDirectiveRealDCB(StringRef IDVal, const fltSemantics &);
640 // ".ds"
641 bool parseDirectiveDS(StringRef IDVal, unsigned Size);
642
643 // .sleb128 (Signed=true) and .uleb128 (Signed=false)
644 bool parseDirectiveLEB128(bool Signed);
645
646 /// Parse a directive like ".globl" which
647 /// accepts a single symbol (which should be a label or an external).
648 bool parseDirectiveSymbolAttribute(MCSymbolAttr Attr);
649
650 bool parseDirectiveComm(bool IsLocal); // ".comm" and ".lcomm"
651
652 bool parseDirectiveAbort(SMLoc DirectiveLoc); // ".abort"
653 bool parseDirectiveInclude(); // ".include"
654 bool parseDirectiveIncbin(); // ".incbin"
655
656 // ".if", ".ifeq", ".ifge", ".ifgt" , ".ifle", ".iflt" or ".ifne"
657 bool parseDirectiveIf(SMLoc DirectiveLoc, DirectiveKind DirKind);
658 // ".ifb" or ".ifnb", depending on ExpectBlank.
659 bool parseDirectiveIfb(SMLoc DirectiveLoc, bool ExpectBlank);
660 // ".ifc" or ".ifnc", depending on ExpectEqual.
661 bool parseDirectiveIfc(SMLoc DirectiveLoc, bool ExpectEqual);
662 // ".ifeqs" or ".ifnes", depending on ExpectEqual.
663 bool parseDirectiveIfeqs(SMLoc DirectiveLoc, bool ExpectEqual);
664 // ".ifdef" or ".ifndef", depending on expect_defined
665 bool parseDirectiveIfdef(SMLoc DirectiveLoc, bool expect_defined);
666 bool parseDirectiveElseIf(SMLoc DirectiveLoc); // ".elseif"
667 bool parseDirectiveElse(SMLoc DirectiveLoc); // ".else"
668 bool parseDirectiveEndIf(SMLoc DirectiveLoc); // .endif
669 bool parseEscapedString(std::string &Data) override;
670 bool parseAngleBracketString(std::string &Data) override;
671
672 // Macro-like directives
673 MCAsmMacro *parseMacroLikeBody(SMLoc DirectiveLoc);
674 void instantiateMacroLikeBody(MCAsmMacro *M, SMLoc DirectiveLoc,
675 raw_svector_ostream &OS);
676 bool parseDirectiveRept(SMLoc DirectiveLoc, StringRef Directive);
677 bool parseDirectiveIrp(SMLoc DirectiveLoc); // ".irp"
678 bool parseDirectiveIrpc(SMLoc DirectiveLoc); // ".irpc"
679 bool parseDirectiveEndr(SMLoc DirectiveLoc); // ".endr"
680
681 // "_emit" or "__emit"
682 bool parseDirectiveMSEmit(SMLoc DirectiveLoc, ParseStatementInfo &Info,
683 size_t Len);
684
685 // "align"
686 bool parseDirectiveMSAlign(SMLoc DirectiveLoc, ParseStatementInfo &Info);
687
688 // "end"
689 bool parseDirectiveEnd(SMLoc DirectiveLoc);
690
691 // ".err" or ".error"
692 bool parseDirectiveError(SMLoc DirectiveLoc, bool WithMessage);
693
694 // ".warning"
695 bool parseDirectiveWarning(SMLoc DirectiveLoc);
696
697 // .print <double-quotes-string>
698 bool parseDirectivePrint(SMLoc DirectiveLoc);
699
700 // .pseudoprobe
701 bool parseDirectivePseudoProbe();
702
703 // ".lto_discard"
704 bool parseDirectiveLTODiscard();
705
706 // Directives to support address-significance tables.
707 bool parseDirectiveAddrsig();
708 bool parseDirectiveAddrsigSym();
709
710 void initializeDirectiveKindMap();
711 void initializeCVDefRangeTypeMap();
712};
713
714class HLASMAsmParser final : public AsmParser {
715private:
716 AsmLexer &Lexer;
717 MCStreamer &Out;
718
719 void lexLeadingSpaces() {
720 while (Lexer.is(K: AsmToken::Space))
721 Lexer.Lex();
722 }
723
724 bool parseAsHLASMLabel(ParseStatementInfo &Info, MCAsmParserSemaCallback *SI);
725 bool parseAsMachineInstruction(ParseStatementInfo &Info,
726 MCAsmParserSemaCallback *SI);
727
728public:
729 HLASMAsmParser(SourceMgr &SM, MCContext &Ctx, MCStreamer &Out,
730 const MCAsmInfo &MAI, unsigned CB = 0)
731 : AsmParser(SM, Ctx, Out, MAI, CB), Lexer(getLexer()), Out(Out) {
732 Lexer.setSkipSpace(false);
733 Lexer.setAllowHashInIdentifier(true);
734 Lexer.setLexHLASMIntegers(true);
735 Lexer.setLexHLASMStrings(true);
736 }
737
738 ~HLASMAsmParser() { Lexer.setSkipSpace(true); }
739
740 bool parseStatement(ParseStatementInfo &Info,
741 MCAsmParserSemaCallback *SI) override;
742};
743
744} // end anonymous namespace
745
746namespace llvm {
747
748extern cl::opt<unsigned> AsmMacroMaxNestingDepth;
749
750extern MCAsmParserExtension *createDarwinAsmParser();
751extern MCAsmParserExtension *createELFAsmParser();
752extern MCAsmParserExtension *createCOFFAsmParser();
753extern MCAsmParserExtension *createGOFFAsmParser();
754extern MCAsmParserExtension *createXCOFFAsmParser();
755extern MCAsmParserExtension *createWasmAsmParser();
756
757} // end namespace llvm
758
759AsmParser::AsmParser(SourceMgr &SM, MCContext &Ctx, MCStreamer &Out,
760 const MCAsmInfo &MAI, unsigned CB = 0)
761 : MCAsmParser(Ctx, Out, SM, MAI), CurBuffer(CB ? CB : SM.getMainFileID()),
762 MacrosEnabledFlag(true) {
763 HadError = false;
764 // Save the old handler.
765 SavedDiagHandler = SrcMgr.getDiagHandler();
766 SavedDiagContext = SrcMgr.getDiagContext();
767 // Set our own handler which calls the saved handler.
768 SrcMgr.setDiagHandler(DH: DiagHandler, Ctx: this);
769 Lexer.setBuffer(Buf: SrcMgr.getMemoryBuffer(i: CurBuffer)->getBuffer());
770 // Make MCStreamer aware of the StartTokLoc for locations in diagnostics.
771 Out.setStartTokLocPtr(&StartTokLoc);
772
773 // Initialize the platform / file format parser.
774 switch (Ctx.getObjectFileType()) {
775 case MCContext::IsCOFF:
776 PlatformParser.reset(p: createCOFFAsmParser());
777 break;
778 case MCContext::IsMachO:
779 PlatformParser.reset(p: createDarwinAsmParser());
780 IsDarwin = true;
781 break;
782 case MCContext::IsELF:
783 PlatformParser.reset(p: createELFAsmParser());
784 break;
785 case MCContext::IsGOFF:
786 PlatformParser.reset(p: createGOFFAsmParser());
787 break;
788 case MCContext::IsSPIRV:
789 report_fatal_error(
790 reason: "Need to implement createSPIRVAsmParser for SPIRV format.");
791 break;
792 case MCContext::IsWasm:
793 PlatformParser.reset(p: createWasmAsmParser());
794 break;
795 case MCContext::IsXCOFF:
796 PlatformParser.reset(p: createXCOFFAsmParser());
797 break;
798 case MCContext::IsDXContainer:
799 report_fatal_error(reason: "DXContainer is not supported yet");
800 break;
801 }
802
803 PlatformParser->Initialize(Parser&: *this);
804 initializeDirectiveKindMap();
805 initializeCVDefRangeTypeMap();
806}
807
808AsmParser::~AsmParser() {
809 assert((HadError || ActiveMacros.empty()) &&
810 "Unexpected active macro instantiation!");
811
812 // Remove MCStreamer's reference to the parser SMLoc.
813 Out.setStartTokLocPtr(nullptr);
814 // Restore the saved diagnostics handler and context for use during
815 // finalization.
816 SrcMgr.setDiagHandler(DH: SavedDiagHandler, Ctx: SavedDiagContext);
817}
818
819void AsmParser::printMacroInstantiations() {
820 // Print the active macro instantiation stack.
821 for (MacroInstantiation *M : reverse(C&: ActiveMacros))
822 printMessage(Loc: M->InstantiationLoc, Kind: SourceMgr::DK_Note,
823 Msg: "while in macro instantiation");
824}
825
826void AsmParser::Note(SMLoc L, const Twine &Msg, SMRange Range) {
827 printPendingErrors();
828 printMessage(Loc: L, Kind: SourceMgr::DK_Note, Msg, Range);
829 printMacroInstantiations();
830}
831
832bool AsmParser::Warning(SMLoc L, const Twine &Msg, SMRange Range) {
833 if(getTargetParser().getTargetOptions().MCNoWarn)
834 return false;
835 if (getTargetParser().getTargetOptions().MCFatalWarnings)
836 return Error(L, Msg, Range);
837 printMessage(Loc: L, Kind: SourceMgr::DK_Warning, Msg, Range);
838 printMacroInstantiations();
839 return false;
840}
841
842bool AsmParser::printError(SMLoc L, const Twine &Msg, SMRange Range) {
843 HadError = true;
844 printMessage(Loc: L, Kind: SourceMgr::DK_Error, Msg, Range);
845 printMacroInstantiations();
846 return true;
847}
848
849bool AsmParser::enterIncludeFile(const std::string &Filename) {
850 std::string IncludedFile;
851 unsigned NewBuf =
852 SrcMgr.AddIncludeFile(Filename, IncludeLoc: Lexer.getLoc(), IncludedFile);
853 if (!NewBuf)
854 return true;
855
856 CurBuffer = NewBuf;
857 Lexer.setBuffer(Buf: SrcMgr.getMemoryBuffer(i: CurBuffer)->getBuffer());
858 return false;
859}
860
861/// Process the specified .incbin file by searching for it in the include paths
862/// then just emitting the byte contents of the file to the streamer. This
863/// returns true on failure.
864bool AsmParser::processIncbinFile(const std::string &Filename, int64_t Skip,
865 const MCExpr *Count, SMLoc Loc) {
866 std::string IncludedFile;
867 unsigned NewBuf =
868 SrcMgr.AddIncludeFile(Filename, IncludeLoc: Lexer.getLoc(), IncludedFile);
869 if (!NewBuf)
870 return true;
871
872 // Pick up the bytes from the file and emit them.
873 StringRef Bytes = SrcMgr.getMemoryBuffer(i: NewBuf)->getBuffer();
874 Bytes = Bytes.drop_front(N: Skip);
875 if (Count) {
876 int64_t Res;
877 if (!Count->evaluateAsAbsolute(Res, Asm: getStreamer().getAssemblerPtr()))
878 return Error(L: Loc, Msg: "expected absolute expression");
879 if (Res < 0)
880 return Warning(L: Loc, Msg: "negative count has no effect");
881 Bytes = Bytes.take_front(N: Res);
882 }
883 getStreamer().emitBytes(Data: Bytes);
884 return false;
885}
886
887void AsmParser::jumpToLoc(SMLoc Loc, unsigned InBuffer) {
888 CurBuffer = InBuffer ? InBuffer : SrcMgr.FindBufferContainingLoc(Loc);
889 Lexer.setBuffer(Buf: SrcMgr.getMemoryBuffer(i: CurBuffer)->getBuffer(),
890 ptr: Loc.getPointer());
891}
892
893const AsmToken &AsmParser::Lex() {
894 if (Lexer.getTok().is(K: AsmToken::Error))
895 Error(L: Lexer.getErrLoc(), Msg: Lexer.getErr());
896
897 // if it's a end of statement with a comment in it
898 if (getTok().is(K: AsmToken::EndOfStatement)) {
899 // if this is a line comment output it.
900 if (!getTok().getString().empty() && getTok().getString().front() != '\n' &&
901 getTok().getString().front() != '\r' && MAI.preserveAsmComments())
902 Out.addExplicitComment(T: Twine(getTok().getString()));
903 }
904
905 const AsmToken *tok = &Lexer.Lex();
906
907 // Parse comments here to be deferred until end of next statement.
908 while (tok->is(K: AsmToken::Comment)) {
909 if (MAI.preserveAsmComments())
910 Out.addExplicitComment(T: Twine(tok->getString()));
911 tok = &Lexer.Lex();
912 }
913
914 if (tok->is(K: AsmToken::Eof)) {
915 // If this is the end of an included file, pop the parent file off the
916 // include stack.
917 SMLoc ParentIncludeLoc = SrcMgr.getParentIncludeLoc(i: CurBuffer);
918 if (ParentIncludeLoc != SMLoc()) {
919 jumpToLoc(Loc: ParentIncludeLoc);
920 return Lex();
921 }
922 }
923
924 return *tok;
925}
926
927bool AsmParser::enabledGenDwarfForAssembly() {
928 // Check whether the user specified -g.
929 if (!getContext().getGenDwarfForAssembly())
930 return false;
931 // If we haven't encountered any .file directives (which would imply that
932 // the assembler source was produced with debug info already) then emit one
933 // describing the assembler source file itself.
934 if (getContext().getGenDwarfFileNumber() == 0) {
935 const MCDwarfFile &RootFile =
936 getContext().getMCDwarfLineTable(/*CUID=*/0).getRootFile();
937 getContext().setGenDwarfFileNumber(getStreamer().emitDwarfFileDirective(
938 /*CUID=*/FileNo: 0, Directory: getContext().getCompilationDir(), Filename: RootFile.Name,
939 Checksum: RootFile.Checksum, Source: RootFile.Source));
940 }
941 return true;
942}
943
944bool AsmParser::Run(bool NoInitialTextSection, bool NoFinalize) {
945 LTODiscardSymbols.clear();
946
947 // Create the initial section, if requested.
948 if (!NoInitialTextSection)
949 Out.initSections(NoExecStack: false, STI: getTargetParser().getSTI());
950
951 // Prime the lexer.
952 Lex();
953
954 HadError = false;
955 AsmCond StartingCondState = TheCondState;
956 SmallVector<AsmRewrite, 4> AsmStrRewrites;
957
958 // If we are generating dwarf for assembly source files save the initial text
959 // section. (Don't use enabledGenDwarfForAssembly() here, as we aren't
960 // emitting any actual debug info yet and haven't had a chance to parse any
961 // embedded .file directives.)
962 if (getContext().getGenDwarfForAssembly()) {
963 MCSection *Sec = getStreamer().getCurrentSectionOnly();
964 if (!Sec->getBeginSymbol()) {
965 MCSymbol *SectionStartSym = getContext().createTempSymbol();
966 getStreamer().emitLabel(Symbol: SectionStartSym);
967 Sec->setBeginSymbol(SectionStartSym);
968 }
969 bool InsertResult = getContext().addGenDwarfSection(Sec);
970 assert(InsertResult && ".text section should not have debug info yet");
971 (void)InsertResult;
972 }
973
974 getTargetParser().onBeginOfFile();
975
976 // While we have input, parse each statement.
977 while (Lexer.isNot(K: AsmToken::Eof)) {
978 ParseStatementInfo Info(&AsmStrRewrites);
979 bool HasError = parseStatement(Info, SI: nullptr);
980
981 // If we have a Lexer Error we are on an Error Token. Load in Lexer Error
982 // for printing ErrMsg via Lex() only if no (presumably better) parser error
983 // exists.
984 if (HasError && !hasPendingError() && Lexer.getTok().is(K: AsmToken::Error))
985 Lex();
986
987 // parseStatement returned true so may need to emit an error.
988 printPendingErrors();
989
990 // Skipping to the next line if needed.
991 if (HasError && !getLexer().justConsumedEOL())
992 eatToEndOfStatement();
993 }
994
995 getTargetParser().onEndOfFile();
996 printPendingErrors();
997
998 // All errors should have been emitted.
999 assert(!hasPendingError() && "unexpected error from parseStatement");
1000
1001 if (TheCondState.TheCond != StartingCondState.TheCond ||
1002 TheCondState.Ignore != StartingCondState.Ignore)
1003 printError(L: getTok().getLoc(), Msg: "unmatched .ifs or .elses");
1004 // Check to see there are no empty DwarfFile slots.
1005 const auto &LineTables = getContext().getMCDwarfLineTables();
1006 if (!LineTables.empty()) {
1007 unsigned Index = 0;
1008 for (const auto &File : LineTables.begin()->second.getMCDwarfFiles()) {
1009 if (File.Name.empty() && Index != 0)
1010 printError(L: getTok().getLoc(), Msg: "unassigned file number: " +
1011 Twine(Index) +
1012 " for .file directives");
1013 ++Index;
1014 }
1015 }
1016
1017 // Check to see that all assembler local symbols were actually defined.
1018 // Targets that don't do subsections via symbols may not want this, though,
1019 // so conservatively exclude them. Only do this if we're finalizing, though,
1020 // as otherwise we won't necessarily have seen everything yet.
1021 if (!NoFinalize) {
1022 if (MAI.hasSubsectionsViaSymbols()) {
1023 for (const auto &TableEntry : getContext().getSymbols()) {
1024 MCSymbol *Sym = TableEntry.getValue().Symbol;
1025 // Variable symbols may not be marked as defined, so check those
1026 // explicitly. If we know it's a variable, we have a definition for
1027 // the purposes of this check.
1028 if (Sym && Sym->isTemporary() && !Sym->isVariable() &&
1029 !Sym->isDefined())
1030 // FIXME: We would really like to refer back to where the symbol was
1031 // first referenced for a source location. We need to add something
1032 // to track that. Currently, we just point to the end of the file.
1033 printError(L: getTok().getLoc(), Msg: "assembler local symbol '" +
1034 Sym->getName() + "' not defined");
1035 }
1036 }
1037
1038 // Temporary symbols like the ones for directional jumps don't go in the
1039 // symbol table. They also need to be diagnosed in all (final) cases.
1040 for (std::tuple<SMLoc, CppHashInfoTy, MCSymbol *> &LocSym : DirLabels) {
1041 if (std::get<2>(t&: LocSym)->isUndefined()) {
1042 // Reset the state of any "# line file" directives we've seen to the
1043 // context as it was at the diagnostic site.
1044 CppHashInfo = std::get<1>(t&: LocSym);
1045 printError(L: std::get<0>(t&: LocSym), Msg: "directional label undefined");
1046 }
1047 }
1048 }
1049 // Finalize the output stream if there are no errors and if the client wants
1050 // us to.
1051 if (!HadError && !NoFinalize) {
1052 if (auto *TS = Out.getTargetStreamer())
1053 TS->emitConstantPools();
1054
1055 Out.finish(EndLoc: Lexer.getLoc());
1056 }
1057
1058 return HadError || getContext().hadError();
1059}
1060
1061bool AsmParser::checkForValidSection() {
1062 if (!ParsingMSInlineAsm && !getStreamer().getCurrentFragment()) {
1063 Out.initSections(NoExecStack: false, STI: getTargetParser().getSTI());
1064 return Error(L: getTok().getLoc(),
1065 Msg: "expected section directive before assembly directive");
1066 }
1067 return false;
1068}
1069
1070/// Throw away the rest of the line for testing purposes.
1071void AsmParser::eatToEndOfStatement() {
1072 while (Lexer.isNot(K: AsmToken::EndOfStatement) && Lexer.isNot(K: AsmToken::Eof))
1073 Lexer.Lex();
1074
1075 // Eat EOL.
1076 if (Lexer.is(K: AsmToken::EndOfStatement))
1077 Lexer.Lex();
1078}
1079
1080StringRef AsmParser::parseStringToEndOfStatement() {
1081 const char *Start = getTok().getLoc().getPointer();
1082
1083 while (Lexer.isNot(K: AsmToken::EndOfStatement) && Lexer.isNot(K: AsmToken::Eof))
1084 Lexer.Lex();
1085
1086 const char *End = getTok().getLoc().getPointer();
1087 return StringRef(Start, End - Start);
1088}
1089
1090StringRef AsmParser::parseStringToComma() {
1091 const char *Start = getTok().getLoc().getPointer();
1092
1093 while (Lexer.isNot(K: AsmToken::EndOfStatement) &&
1094 Lexer.isNot(K: AsmToken::Comma) && Lexer.isNot(K: AsmToken::Eof))
1095 Lexer.Lex();
1096
1097 const char *End = getTok().getLoc().getPointer();
1098 return StringRef(Start, End - Start);
1099}
1100
1101/// Parse a paren expression and return it.
1102/// NOTE: This assumes the leading '(' has already been consumed.
1103///
1104/// parenexpr ::= expr)
1105///
1106bool AsmParser::parseParenExpr(const MCExpr *&Res, SMLoc &EndLoc) {
1107 if (parseExpression(Res))
1108 return true;
1109 EndLoc = Lexer.getTok().getEndLoc();
1110 return parseRParen();
1111}
1112
1113/// Parse a bracket expression and return it.
1114/// NOTE: This assumes the leading '[' has already been consumed.
1115///
1116/// bracketexpr ::= expr]
1117///
1118bool AsmParser::parseBracketExpr(const MCExpr *&Res, SMLoc &EndLoc) {
1119 if (parseExpression(Res))
1120 return true;
1121 EndLoc = getTok().getEndLoc();
1122 if (parseToken(T: AsmToken::RBrac, Msg: "expected ']' in brackets expression"))
1123 return true;
1124 return false;
1125}
1126
1127/// Parse a primary expression and return it.
1128/// primaryexpr ::= (parenexpr
1129/// primaryexpr ::= symbol
1130/// primaryexpr ::= number
1131/// primaryexpr ::= '.'
1132/// primaryexpr ::= ~,+,- primaryexpr
1133bool AsmParser::parsePrimaryExpr(const MCExpr *&Res, SMLoc &EndLoc,
1134 AsmTypeInfo *TypeInfo) {
1135 SMLoc FirstTokenLoc = getLexer().getLoc();
1136 AsmToken::TokenKind FirstTokenKind = Lexer.getKind();
1137 switch (FirstTokenKind) {
1138 default:
1139 return TokError(Msg: "unknown token in expression");
1140 // If we have an error assume that we've already handled it.
1141 case AsmToken::Error:
1142 return true;
1143 case AsmToken::Exclaim:
1144 Lex(); // Eat the operator.
1145 if (parsePrimaryExpr(Res, EndLoc, TypeInfo))
1146 return true;
1147 Res = MCUnaryExpr::createLNot(Expr: Res, Ctx&: getContext(), Loc: FirstTokenLoc);
1148 return false;
1149 case AsmToken::Dollar:
1150 case AsmToken::Star:
1151 case AsmToken::At:
1152 case AsmToken::String:
1153 case AsmToken::Identifier: {
1154 StringRef Identifier;
1155 if (parseIdentifier(Res&: Identifier)) {
1156 // We may have failed but '$'|'*' may be a valid token in context of
1157 // the current PC.
1158 if (getTok().is(K: AsmToken::Dollar) || getTok().is(K: AsmToken::Star)) {
1159 bool ShouldGenerateTempSymbol = false;
1160 if ((getTok().is(K: AsmToken::Dollar) && MAI.getDollarIsPC()) ||
1161 (getTok().is(K: AsmToken::Star) && MAI.isHLASM()))
1162 ShouldGenerateTempSymbol = true;
1163
1164 if (!ShouldGenerateTempSymbol)
1165 return Error(L: FirstTokenLoc, Msg: "invalid token in expression");
1166
1167 // Eat the '$'|'*' token.
1168 Lex();
1169 // This is either a '$'|'*' reference, which references the current PC.
1170 // Emit a temporary label to the streamer and refer to it.
1171 MCSymbol *Sym = Ctx.createTempSymbol();
1172 Out.emitLabel(Symbol: Sym);
1173 Res = MCSymbolRefExpr::create(Symbol: Sym, Ctx&: getContext());
1174 EndLoc = FirstTokenLoc;
1175 return false;
1176 }
1177 }
1178 // Parse an optional relocation specifier.
1179 std::pair<StringRef, StringRef> Split;
1180 if (MAI.useAtForSpecifier()) {
1181 if (FirstTokenKind == AsmToken::String) {
1182 if (Lexer.is(K: AsmToken::At)) {
1183 Lex(); // eat @
1184 SMLoc AtLoc = getLexer().getLoc();
1185 StringRef VName;
1186 if (parseIdentifier(Res&: VName))
1187 return Error(L: AtLoc, Msg: "expected symbol variant after '@'");
1188
1189 Split = std::make_pair(x&: Identifier, y&: VName);
1190 }
1191 } else if (Lexer.getAllowAtInIdentifier()) {
1192 Split = Identifier.split(Separator: '@');
1193 }
1194 } else if (MAI.useParensForSpecifier() &&
1195 parseOptionalToken(T: AsmToken::LParen)) {
1196 StringRef VName;
1197 parseIdentifier(Res&: VName);
1198 if (parseRParen())
1199 return true;
1200 Split = std::make_pair(x&: Identifier, y&: VName);
1201 }
1202
1203 EndLoc = SMLoc::getFromPointer(Ptr: Identifier.end());
1204
1205 // This is a symbol reference.
1206 StringRef SymbolName = Identifier;
1207 if (SymbolName.empty())
1208 return Error(L: getLexer().getLoc(), Msg: "expected a symbol reference");
1209
1210 // Lookup the @specifier if used.
1211 uint16_t Spec = 0;
1212 if (!Split.second.empty()) {
1213 auto MaybeSpecifier = MAI.getSpecifierForName(Name: Split.second);
1214 if (MaybeSpecifier) {
1215 SymbolName = Split.first;
1216 Spec = *MaybeSpecifier;
1217 } else if (!MAI.doesAllowAtInName()) {
1218 return Error(L: SMLoc::getFromPointer(Ptr: Split.second.begin()),
1219 Msg: "invalid variant '" + Split.second + "'");
1220 }
1221 }
1222
1223 MCSymbol *Sym = getContext().getInlineAsmLabel(Name: SymbolName);
1224 if (!Sym)
1225 Sym = getContext().getOrCreateSymbol(Name: MAI.isHLASM() ? SymbolName.upper()
1226 : SymbolName);
1227
1228 // If this is an absolute variable reference, substitute it now to preserve
1229 // semantics in the face of reassignment.
1230 if (Sym->isVariable()) {
1231 auto V = Sym->getVariableValue();
1232 bool DoInline = isa<MCConstantExpr>(Val: V) && !Spec;
1233 if (auto TV = dyn_cast<MCTargetExpr>(Val: V))
1234 DoInline = TV->inlineAssignedExpr();
1235 if (DoInline) {
1236 if (Spec)
1237 return Error(L: EndLoc, Msg: "unexpected modifier on variable reference");
1238 Res = Sym->getVariableValue();
1239 return false;
1240 }
1241 }
1242
1243 // Otherwise create a symbol ref.
1244 Res = MCSymbolRefExpr::create(Symbol: Sym, specifier: Spec, Ctx&: getContext(), Loc: FirstTokenLoc);
1245 return false;
1246 }
1247 case AsmToken::BigNum:
1248 return TokError(Msg: "literal value out of range for directive");
1249 case AsmToken::Integer: {
1250 SMLoc Loc = getTok().getLoc();
1251 int64_t IntVal = getTok().getIntVal();
1252 Res = MCConstantExpr::create(Value: IntVal, Ctx&: getContext());
1253 EndLoc = Lexer.getTok().getEndLoc();
1254 Lex(); // Eat token.
1255 // Look for 'b' or 'f' following an Integer as a directional label
1256 if (Lexer.getKind() == AsmToken::Identifier) {
1257 StringRef IDVal = getTok().getString();
1258 // Lookup the symbol variant if used.
1259 std::pair<StringRef, StringRef> Split = IDVal.split(Separator: '@');
1260 uint16_t Spec = 0;
1261 if (Split.first.size() != IDVal.size()) {
1262 auto MaybeSpec = MAI.getSpecifierForName(Name: Split.second);
1263 if (!MaybeSpec)
1264 return TokError(Msg: "invalid variant '" + Split.second + "'");
1265 IDVal = Split.first;
1266 Spec = *MaybeSpec;
1267 }
1268 if (IDVal == "f" || IDVal == "b") {
1269 MCSymbol *Sym =
1270 Ctx.getDirectionalLocalSymbol(LocalLabelVal: IntVal, Before: IDVal == "b");
1271 Res = MCSymbolRefExpr::create(Symbol: Sym, specifier: Spec, Ctx&: getContext(), Loc);
1272 if (IDVal == "b" && Sym->isUndefined())
1273 return Error(L: Loc, Msg: "directional label undefined");
1274 DirLabels.push_back(Elt: std::make_tuple(args&: Loc, args&: CppHashInfo, args&: Sym));
1275 EndLoc = Lexer.getTok().getEndLoc();
1276 Lex(); // Eat identifier.
1277 }
1278 }
1279 return false;
1280 }
1281 case AsmToken::Real: {
1282 APFloat RealVal(APFloat::IEEEdouble(), getTok().getString());
1283 uint64_t IntVal = RealVal.bitcastToAPInt().getZExtValue();
1284 Res = MCConstantExpr::create(Value: IntVal, Ctx&: getContext());
1285 EndLoc = Lexer.getTok().getEndLoc();
1286 Lex(); // Eat token.
1287 return false;
1288 }
1289 case AsmToken::Dot: {
1290 if (MAI.isHLASM())
1291 return TokError(Msg: "cannot use . as current PC");
1292
1293 // This is a '.' reference, which references the current PC. Emit a
1294 // temporary label to the streamer and refer to it.
1295 MCSymbol *Sym = Ctx.createTempSymbol();
1296 Out.emitLabel(Symbol: Sym);
1297 Res = MCSymbolRefExpr::create(Symbol: Sym, Ctx&: getContext());
1298 EndLoc = Lexer.getTok().getEndLoc();
1299 Lex(); // Eat identifier.
1300 return false;
1301 }
1302 case AsmToken::LParen:
1303 Lex(); // Eat the '('.
1304 return parseParenExpr(Res, EndLoc);
1305 case AsmToken::LBrac:
1306 if (!PlatformParser->HasBracketExpressions())
1307 return TokError(Msg: "brackets expression not supported on this target");
1308 Lex(); // Eat the '['.
1309 return parseBracketExpr(Res, EndLoc);
1310 case AsmToken::Minus:
1311 Lex(); // Eat the operator.
1312 if (parsePrimaryExpr(Res, EndLoc, TypeInfo))
1313 return true;
1314 Res = MCUnaryExpr::createMinus(Expr: Res, Ctx&: getContext(), Loc: FirstTokenLoc);
1315 return false;
1316 case AsmToken::Plus:
1317 Lex(); // Eat the operator.
1318 if (parsePrimaryExpr(Res, EndLoc, TypeInfo))
1319 return true;
1320 Res = MCUnaryExpr::createPlus(Expr: Res, Ctx&: getContext(), Loc: FirstTokenLoc);
1321 return false;
1322 case AsmToken::Tilde:
1323 Lex(); // Eat the operator.
1324 if (parsePrimaryExpr(Res, EndLoc, TypeInfo))
1325 return true;
1326 Res = MCUnaryExpr::createNot(Expr: Res, Ctx&: getContext(), Loc: FirstTokenLoc);
1327 return false;
1328 }
1329}
1330
1331bool AsmParser::parseExpression(const MCExpr *&Res) {
1332 SMLoc EndLoc;
1333 return parseExpression(Res, EndLoc);
1334}
1335
1336const MCExpr *MCAsmParser::applySpecifier(const MCExpr *E, uint32_t Spec) {
1337 // Ask the target implementation about this expression first.
1338 const MCExpr *NewE = getTargetParser().applySpecifier(E, Spec, Ctx);
1339 if (NewE)
1340 return NewE;
1341 // Recurse over the given expression, rebuilding it to apply the given variant
1342 // if there is exactly one symbol.
1343 switch (E->getKind()) {
1344 case MCExpr::Specifier:
1345 llvm_unreachable("cannot apply another specifier to MCSpecifierExpr");
1346 case MCExpr::Target:
1347 case MCExpr::Constant:
1348 return nullptr;
1349
1350 case MCExpr::SymbolRef: {
1351 const MCSymbolRefExpr *SRE = cast<MCSymbolRefExpr>(Val: E);
1352
1353 if (SRE->getSpecifier()) {
1354 TokError(Msg: "invalid variant on expression '" + getTok().getIdentifier() +
1355 "' (already modified)");
1356 return E;
1357 }
1358
1359 return MCSymbolRefExpr::create(Symbol: &SRE->getSymbol(), specifier: Spec, Ctx&: getContext());
1360 }
1361
1362 case MCExpr::Unary: {
1363 const MCUnaryExpr *UE = cast<MCUnaryExpr>(Val: E);
1364 const MCExpr *Sub = applySpecifier(E: UE->getSubExpr(), Spec);
1365 if (!Sub)
1366 return nullptr;
1367 return MCUnaryExpr::create(Op: UE->getOpcode(), Expr: Sub, Ctx&: getContext());
1368 }
1369
1370 case MCExpr::Binary: {
1371 const MCBinaryExpr *BE = cast<MCBinaryExpr>(Val: E);
1372 const MCExpr *LHS = applySpecifier(E: BE->getLHS(), Spec);
1373 const MCExpr *RHS = applySpecifier(E: BE->getRHS(), Spec);
1374
1375 if (!LHS && !RHS)
1376 return nullptr;
1377
1378 if (!LHS)
1379 LHS = BE->getLHS();
1380 if (!RHS)
1381 RHS = BE->getRHS();
1382
1383 return MCBinaryExpr::create(Op: BE->getOpcode(), LHS, RHS, Ctx&: getContext());
1384 }
1385 }
1386
1387 llvm_unreachable("Invalid expression kind!");
1388}
1389
1390/// This function checks if the next token is <string> type or arithmetic.
1391/// string that begin with character '<' must end with character '>'.
1392/// otherwise it is arithmetics.
1393/// If the function returns a 'true' value,
1394/// the End argument will be filled with the last location pointed to the '>'
1395/// character.
1396
1397/// There is a gap between the AltMacro's documentation and the single quote
1398/// implementation. GCC does not fully support this feature and so we will not
1399/// support it.
1400/// TODO: Adding single quote as a string.
1401static bool isAngleBracketString(SMLoc &StrLoc, SMLoc &EndLoc) {
1402 assert((StrLoc.getPointer() != nullptr) &&
1403 "Argument to the function cannot be a NULL value");
1404 const char *CharPtr = StrLoc.getPointer();
1405 while ((*CharPtr != '>') && (*CharPtr != '\n') && (*CharPtr != '\r') &&
1406 (*CharPtr != '\0')) {
1407 if (*CharPtr == '!')
1408 CharPtr++;
1409 CharPtr++;
1410 }
1411 if (*CharPtr == '>') {
1412 EndLoc = StrLoc.getFromPointer(Ptr: CharPtr + 1);
1413 return true;
1414 }
1415 return false;
1416}
1417
1418/// creating a string without the escape characters '!'.
1419static std::string angleBracketString(StringRef AltMacroStr) {
1420 std::string Res;
1421 for (size_t Pos = 0; Pos < AltMacroStr.size(); Pos++) {
1422 if (AltMacroStr[Pos] == '!')
1423 Pos++;
1424 Res += AltMacroStr[Pos];
1425 }
1426 return Res;
1427}
1428
1429bool MCAsmParser::parseAtSpecifier(const MCExpr *&Res, SMLoc &EndLoc) {
1430 if (parseOptionalToken(T: AsmToken::At)) {
1431 if (getLexer().isNot(K: AsmToken::Identifier))
1432 return TokError(Msg: "expected specifier following '@'");
1433
1434 auto Spec = MAI.getSpecifierForName(Name: getTok().getIdentifier());
1435 if (!Spec)
1436 return TokError(Msg: "invalid specifier '@" + getTok().getIdentifier() + "'");
1437
1438 const MCExpr *ModifiedRes = applySpecifier(E: Res, Spec: *Spec);
1439 if (ModifiedRes)
1440 Res = ModifiedRes;
1441 Lex();
1442 }
1443 return false;
1444}
1445
1446/// Parse an expression and return it.
1447///
1448/// expr ::= expr &&,|| expr -> lowest.
1449/// expr ::= expr |,^,&,! expr
1450/// expr ::= expr ==,!=,<>,<,<=,>,>= expr
1451/// expr ::= expr <<,>> expr
1452/// expr ::= expr +,- expr
1453/// expr ::= expr *,/,% expr -> highest.
1454/// expr ::= primaryexpr
1455///
1456bool AsmParser::parseExpression(const MCExpr *&Res, SMLoc &EndLoc) {
1457 // Parse the expression.
1458 Res = nullptr;
1459 auto &TS = getTargetParser();
1460 if (TS.parsePrimaryExpr(Res, EndLoc) || parseBinOpRHS(Precedence: 1, Res, EndLoc))
1461 return true;
1462
1463 // As a special case, we support 'a op b @ modifier' by rewriting the
1464 // expression to include the modifier. This is inefficient, but in general we
1465 // expect users to use 'a@modifier op b'.
1466 if (Lexer.getAllowAtInIdentifier() && parseOptionalToken(T: AsmToken::At)) {
1467 if (Lexer.isNot(K: AsmToken::Identifier))
1468 return TokError(Msg: "unexpected symbol modifier following '@'");
1469
1470 auto Spec = MAI.getSpecifierForName(Name: getTok().getIdentifier());
1471 if (!Spec)
1472 return TokError(Msg: "invalid variant '" + getTok().getIdentifier() + "'");
1473
1474 const MCExpr *ModifiedRes = applySpecifier(E: Res, Spec: *Spec);
1475 if (!ModifiedRes) {
1476 return TokError(Msg: "invalid modifier '" + getTok().getIdentifier() +
1477 "' (no symbols present)");
1478 }
1479
1480 Res = ModifiedRes;
1481 Lex();
1482 }
1483
1484 // Try to constant fold it up front, if possible. Do not exploit
1485 // assembler here.
1486 int64_t Value;
1487 if (Res->evaluateAsAbsolute(Res&: Value))
1488 Res = MCConstantExpr::create(Value, Ctx&: getContext());
1489
1490 return false;
1491}
1492
1493bool AsmParser::parseParenExpression(const MCExpr *&Res, SMLoc &EndLoc) {
1494 Res = nullptr;
1495 return parseParenExpr(Res, EndLoc) || parseBinOpRHS(Precedence: 1, Res, EndLoc);
1496}
1497
1498bool AsmParser::parseAbsoluteExpression(int64_t &Res) {
1499 const MCExpr *Expr;
1500
1501 SMLoc StartLoc = Lexer.getLoc();
1502 if (parseExpression(Res&: Expr))
1503 return true;
1504
1505 if (!Expr->evaluateAsAbsolute(Res, Asm: getStreamer().getAssemblerPtr()))
1506 return Error(L: StartLoc, Msg: "expected absolute expression");
1507
1508 return false;
1509}
1510
1511static unsigned getDarwinBinOpPrecedence(AsmToken::TokenKind K,
1512 MCBinaryExpr::Opcode &Kind,
1513 bool ShouldUseLogicalShr) {
1514 switch (K) {
1515 default:
1516 return 0; // not a binop.
1517
1518 // Lowest Precedence: &&, ||
1519 case AsmToken::AmpAmp:
1520 Kind = MCBinaryExpr::LAnd;
1521 return 1;
1522 case AsmToken::PipePipe:
1523 Kind = MCBinaryExpr::LOr;
1524 return 1;
1525
1526 // Low Precedence: |, &, ^
1527 case AsmToken::Pipe:
1528 Kind = MCBinaryExpr::Or;
1529 return 2;
1530 case AsmToken::Caret:
1531 Kind = MCBinaryExpr::Xor;
1532 return 2;
1533 case AsmToken::Amp:
1534 Kind = MCBinaryExpr::And;
1535 return 2;
1536
1537 // Low Intermediate Precedence: ==, !=, <>, <, <=, >, >=
1538 case AsmToken::EqualEqual:
1539 Kind = MCBinaryExpr::EQ;
1540 return 3;
1541 case AsmToken::ExclaimEqual:
1542 case AsmToken::LessGreater:
1543 Kind = MCBinaryExpr::NE;
1544 return 3;
1545 case AsmToken::Less:
1546 Kind = MCBinaryExpr::LT;
1547 return 3;
1548 case AsmToken::LessEqual:
1549 Kind = MCBinaryExpr::LTE;
1550 return 3;
1551 case AsmToken::Greater:
1552 Kind = MCBinaryExpr::GT;
1553 return 3;
1554 case AsmToken::GreaterEqual:
1555 Kind = MCBinaryExpr::GTE;
1556 return 3;
1557
1558 // Intermediate Precedence: <<, >>
1559 case AsmToken::LessLess:
1560 Kind = MCBinaryExpr::Shl;
1561 return 4;
1562 case AsmToken::GreaterGreater:
1563 Kind = ShouldUseLogicalShr ? MCBinaryExpr::LShr : MCBinaryExpr::AShr;
1564 return 4;
1565
1566 // High Intermediate Precedence: +, -
1567 case AsmToken::Plus:
1568 Kind = MCBinaryExpr::Add;
1569 return 5;
1570 case AsmToken::Minus:
1571 Kind = MCBinaryExpr::Sub;
1572 return 5;
1573
1574 // Highest Precedence: *, /, %
1575 case AsmToken::Star:
1576 Kind = MCBinaryExpr::Mul;
1577 return 6;
1578 case AsmToken::Slash:
1579 Kind = MCBinaryExpr::Div;
1580 return 6;
1581 case AsmToken::Percent:
1582 Kind = MCBinaryExpr::Mod;
1583 return 6;
1584 }
1585}
1586
1587static unsigned getGNUBinOpPrecedence(const MCAsmInfo &MAI,
1588 AsmToken::TokenKind K,
1589 MCBinaryExpr::Opcode &Kind,
1590 bool ShouldUseLogicalShr) {
1591 switch (K) {
1592 default:
1593 return 0; // not a binop.
1594
1595 // Lowest Precedence: &&, ||
1596 case AsmToken::AmpAmp:
1597 Kind = MCBinaryExpr::LAnd;
1598 return 2;
1599 case AsmToken::PipePipe:
1600 Kind = MCBinaryExpr::LOr;
1601 return 1;
1602
1603 // Low Precedence: ==, !=, <>, <, <=, >, >=
1604 case AsmToken::EqualEqual:
1605 Kind = MCBinaryExpr::EQ;
1606 return 3;
1607 case AsmToken::ExclaimEqual:
1608 case AsmToken::LessGreater:
1609 Kind = MCBinaryExpr::NE;
1610 return 3;
1611 case AsmToken::Less:
1612 Kind = MCBinaryExpr::LT;
1613 return 3;
1614 case AsmToken::LessEqual:
1615 Kind = MCBinaryExpr::LTE;
1616 return 3;
1617 case AsmToken::Greater:
1618 Kind = MCBinaryExpr::GT;
1619 return 3;
1620 case AsmToken::GreaterEqual:
1621 Kind = MCBinaryExpr::GTE;
1622 return 3;
1623
1624 // Low Intermediate Precedence: +, -
1625 case AsmToken::Plus:
1626 Kind = MCBinaryExpr::Add;
1627 return 4;
1628 case AsmToken::Minus:
1629 Kind = MCBinaryExpr::Sub;
1630 return 4;
1631
1632 // High Intermediate Precedence: |, !, &, ^
1633 //
1634 case AsmToken::Pipe:
1635 Kind = MCBinaryExpr::Or;
1636 return 5;
1637 case AsmToken::Exclaim:
1638 // Hack to support ARM compatible aliases (implied 'sp' operand in 'srs*'
1639 // instructions like 'srsda #31!') and not parse ! as an infix operator.
1640 if (MAI.getCommentString() == "@")
1641 return 0;
1642 Kind = MCBinaryExpr::OrNot;
1643 return 5;
1644 case AsmToken::Caret:
1645 Kind = MCBinaryExpr::Xor;
1646 return 5;
1647 case AsmToken::Amp:
1648 Kind = MCBinaryExpr::And;
1649 return 5;
1650
1651 // Highest Precedence: *, /, %, <<, >>
1652 case AsmToken::Star:
1653 Kind = MCBinaryExpr::Mul;
1654 return 6;
1655 case AsmToken::Slash:
1656 Kind = MCBinaryExpr::Div;
1657 return 6;
1658 case AsmToken::Percent:
1659 Kind = MCBinaryExpr::Mod;
1660 return 6;
1661 case AsmToken::LessLess:
1662 Kind = MCBinaryExpr::Shl;
1663 return 6;
1664 case AsmToken::GreaterGreater:
1665 Kind = ShouldUseLogicalShr ? MCBinaryExpr::LShr : MCBinaryExpr::AShr;
1666 return 6;
1667 }
1668}
1669
1670unsigned AsmParser::getBinOpPrecedence(AsmToken::TokenKind K,
1671 MCBinaryExpr::Opcode &Kind) {
1672 bool ShouldUseLogicalShr = MAI.shouldUseLogicalShr();
1673 return IsDarwin ? getDarwinBinOpPrecedence(K, Kind, ShouldUseLogicalShr)
1674 : getGNUBinOpPrecedence(MAI, K, Kind, ShouldUseLogicalShr);
1675}
1676
1677/// Parse all binary operators with precedence >= 'Precedence'.
1678/// Res contains the LHS of the expression on input.
1679bool AsmParser::parseBinOpRHS(unsigned Precedence, const MCExpr *&Res,
1680 SMLoc &EndLoc) {
1681 SMLoc StartLoc = Lexer.getLoc();
1682 while (true) {
1683 MCBinaryExpr::Opcode Kind = MCBinaryExpr::Add;
1684 unsigned TokPrec = getBinOpPrecedence(K: Lexer.getKind(), Kind);
1685
1686 // If the next token is lower precedence than we are allowed to eat, return
1687 // successfully with what we ate already.
1688 if (TokPrec < Precedence)
1689 return false;
1690
1691 Lex();
1692
1693 // Eat the next primary expression.
1694 const MCExpr *RHS;
1695 if (getTargetParser().parsePrimaryExpr(Res&: RHS, EndLoc))
1696 return true;
1697
1698 // If BinOp binds less tightly with RHS than the operator after RHS, let
1699 // the pending operator take RHS as its LHS.
1700 MCBinaryExpr::Opcode Dummy;
1701 unsigned NextTokPrec = getBinOpPrecedence(K: Lexer.getKind(), Kind&: Dummy);
1702 if (TokPrec < NextTokPrec && parseBinOpRHS(Precedence: TokPrec + 1, Res&: RHS, EndLoc))
1703 return true;
1704
1705 // Merge LHS and RHS according to operator.
1706 Res = MCBinaryExpr::create(Op: Kind, LHS: Res, RHS, Ctx&: getContext(), Loc: StartLoc);
1707 }
1708}
1709
1710/// ParseStatement:
1711/// ::= EndOfStatement
1712/// ::= Label* Directive ...Operands... EndOfStatement
1713/// ::= Label* Identifier OperandList* EndOfStatement
1714bool AsmParser::parseStatement(ParseStatementInfo &Info,
1715 MCAsmParserSemaCallback *SI) {
1716 assert(!hasPendingError() && "parseStatement started with pending error");
1717 // Eat initial spaces and comments
1718 while (Lexer.is(K: AsmToken::Space))
1719 Lex();
1720 if (Lexer.is(K: AsmToken::EndOfStatement)) {
1721 // if this is a line comment we can drop it safely
1722 if (getTok().getString().empty() || getTok().getString().front() == '\r' ||
1723 getTok().getString().front() == '\n')
1724 Out.addBlankLine();
1725 Lex();
1726 return false;
1727 }
1728 // Statements always start with an identifier.
1729 AsmToken ID = getTok();
1730 SMLoc IDLoc = ID.getLoc();
1731 StringRef IDVal;
1732 int64_t LocalLabelVal = -1;
1733 StartTokLoc = ID.getLoc();
1734 if (Lexer.is(K: AsmToken::HashDirective))
1735 return parseCppHashLineFilenameComment(L: IDLoc,
1736 SaveLocInfo: !isInsideMacroInstantiation());
1737
1738 // Allow an integer followed by a ':' as a directional local label.
1739 if (Lexer.is(K: AsmToken::Integer)) {
1740 LocalLabelVal = getTok().getIntVal();
1741 if (LocalLabelVal < 0) {
1742 if (!TheCondState.Ignore) {
1743 Lex(); // always eat a token
1744 return Error(L: IDLoc, Msg: "unexpected token at start of statement");
1745 }
1746 IDVal = "";
1747 } else {
1748 IDVal = getTok().getString();
1749 Lex(); // Consume the integer token to be used as an identifier token.
1750 if (Lexer.getKind() != AsmToken::Colon) {
1751 if (!TheCondState.Ignore) {
1752 Lex(); // always eat a token
1753 return Error(L: IDLoc, Msg: "unexpected token at start of statement");
1754 }
1755 }
1756 }
1757 } else if (Lexer.is(K: AsmToken::Dot)) {
1758 // Treat '.' as a valid identifier in this context.
1759 Lex();
1760 IDVal = ".";
1761 } else if (getTargetParser().tokenIsStartOfStatement(Token: ID.getKind())) {
1762 Lex();
1763 IDVal = ID.getString();
1764 } else if (parseIdentifier(Res&: IDVal)) {
1765 if (!TheCondState.Ignore) {
1766 Lex(); // always eat a token
1767 return Error(L: IDLoc, Msg: "unexpected token at start of statement");
1768 }
1769 IDVal = "";
1770 }
1771
1772 // Handle conditional assembly here before checking for skipping. We
1773 // have to do this so that .endif isn't skipped in a ".if 0" block for
1774 // example.
1775 StringMap<DirectiveKind>::const_iterator DirKindIt =
1776 DirectiveKindMap.find(Key: IDVal.lower());
1777 DirectiveKind DirKind = (DirKindIt == DirectiveKindMap.end())
1778 ? DK_NO_DIRECTIVE
1779 : DirKindIt->getValue();
1780 switch (DirKind) {
1781 default:
1782 break;
1783 case DK_IF:
1784 case DK_IFEQ:
1785 case DK_IFGE:
1786 case DK_IFGT:
1787 case DK_IFLE:
1788 case DK_IFLT:
1789 case DK_IFNE:
1790 return parseDirectiveIf(DirectiveLoc: IDLoc, DirKind);
1791 case DK_IFB:
1792 return parseDirectiveIfb(DirectiveLoc: IDLoc, ExpectBlank: true);
1793 case DK_IFNB:
1794 return parseDirectiveIfb(DirectiveLoc: IDLoc, ExpectBlank: false);
1795 case DK_IFC:
1796 return parseDirectiveIfc(DirectiveLoc: IDLoc, ExpectEqual: true);
1797 case DK_IFEQS:
1798 return parseDirectiveIfeqs(DirectiveLoc: IDLoc, ExpectEqual: true);
1799 case DK_IFNC:
1800 return parseDirectiveIfc(DirectiveLoc: IDLoc, ExpectEqual: false);
1801 case DK_IFNES:
1802 return parseDirectiveIfeqs(DirectiveLoc: IDLoc, ExpectEqual: false);
1803 case DK_IFDEF:
1804 return parseDirectiveIfdef(DirectiveLoc: IDLoc, expect_defined: true);
1805 case DK_IFNDEF:
1806 case DK_IFNOTDEF:
1807 return parseDirectiveIfdef(DirectiveLoc: IDLoc, expect_defined: false);
1808 case DK_ELSEIF:
1809 return parseDirectiveElseIf(DirectiveLoc: IDLoc);
1810 case DK_ELSE:
1811 return parseDirectiveElse(DirectiveLoc: IDLoc);
1812 case DK_ENDIF:
1813 return parseDirectiveEndIf(DirectiveLoc: IDLoc);
1814 }
1815
1816 // Ignore the statement if in the middle of inactive conditional
1817 // (e.g. ".if 0").
1818 if (TheCondState.Ignore) {
1819 eatToEndOfStatement();
1820 return false;
1821 }
1822
1823 // FIXME: Recurse on local labels?
1824
1825 // Check for a label.
1826 // ::= identifier ':'
1827 // ::= number ':'
1828 if (Lexer.is(K: AsmToken::Colon) && getTargetParser().isLabel(Token&: ID)) {
1829 if (checkForValidSection())
1830 return true;
1831
1832 Lex(); // Consume the ':'.
1833
1834 // Diagnose attempt to use '.' as a label.
1835 if (IDVal == ".")
1836 return Error(L: IDLoc, Msg: "invalid use of pseudo-symbol '.' as a label");
1837
1838 // Diagnose attempt to use a variable as a label.
1839 //
1840 // FIXME: Diagnostics. Note the location of the definition as a label.
1841 // FIXME: This doesn't diagnose assignment to a symbol which has been
1842 // implicitly marked as external.
1843 MCSymbol *Sym;
1844 if (LocalLabelVal == -1) {
1845 if (ParsingMSInlineAsm && SI) {
1846 StringRef RewrittenLabel =
1847 SI->LookupInlineAsmLabel(Identifier: IDVal, SM&: getSourceManager(), Location: IDLoc, Create: true);
1848 assert(!RewrittenLabel.empty() &&
1849 "We should have an internal name here.");
1850 Info.AsmRewrites->emplace_back(Args: AOK_Label, Args&: IDLoc, Args: IDVal.size(),
1851 Args&: RewrittenLabel);
1852 IDVal = RewrittenLabel;
1853 }
1854 Sym = getContext().getOrCreateSymbol(Name: IDVal);
1855 } else
1856 Sym = Ctx.createDirectionalLocalSymbol(LocalLabelVal);
1857 // End of Labels should be treated as end of line for lexing
1858 // purposes but that information is not available to the Lexer who
1859 // does not understand Labels. This may cause us to see a Hash
1860 // here instead of a preprocessor line comment.
1861 if (getTok().is(K: AsmToken::Hash)) {
1862 StringRef CommentStr = parseStringToEndOfStatement();
1863 Lexer.Lex();
1864 Lexer.UnLex(Token: AsmToken(AsmToken::EndOfStatement, CommentStr));
1865 }
1866
1867 // Consume any end of statement token, if present, to avoid spurious
1868 // addBlankLine calls().
1869 if (getTok().is(K: AsmToken::EndOfStatement)) {
1870 Lex();
1871 }
1872
1873 if (MAI.hasSubsectionsViaSymbols() && CFIStartProcLoc &&
1874 Sym->isExternal() && !cast<MCSymbolMachO>(Val: Sym)->isAltEntry())
1875 return Error(L: StartTokLoc, Msg: "non-private labels cannot appear between "
1876 ".cfi_startproc / .cfi_endproc pairs") &&
1877 Error(L: *CFIStartProcLoc, Msg: "previous .cfi_startproc was here");
1878
1879 if (discardLTOSymbol(Name: IDVal))
1880 return false;
1881
1882 getTargetParser().doBeforeLabelEmit(Symbol: Sym, IDLoc);
1883
1884 // Emit the label.
1885 if (!getTargetParser().isParsingMSInlineAsm())
1886 Out.emitLabel(Symbol: Sym, Loc: IDLoc);
1887
1888 // If we are generating dwarf for assembly source files then gather the
1889 // info to make a dwarf label entry for this label if needed.
1890 if (enabledGenDwarfForAssembly())
1891 MCGenDwarfLabelEntry::Make(Symbol: Sym, MCOS: &getStreamer(), SrcMgr&: getSourceManager(),
1892 Loc&: IDLoc);
1893
1894 getTargetParser().onLabelParsed(Symbol: Sym);
1895
1896 return false;
1897 }
1898
1899 // Check for an assignment statement.
1900 // ::= identifier '='
1901 if (Lexer.is(K: AsmToken::Equal) && getTargetParser().equalIsAsmAssignment()) {
1902 Lex();
1903 return parseAssignment(Name: IDVal, Kind: AssignmentKind::Equal);
1904 }
1905
1906 // If macros are enabled, check to see if this is a macro instantiation.
1907 if (areMacrosEnabled())
1908 if (MCAsmMacro *M = getContext().lookupMacro(Name: IDVal))
1909 return handleMacroEntry(M, NameLoc: IDLoc);
1910
1911 // Otherwise, we have a normal instruction or directive.
1912
1913 // Directives start with "."
1914 if (IDVal.starts_with(Prefix: ".") && IDVal != ".") {
1915 // There are several entities interested in parsing directives:
1916 //
1917 // 1. The target-specific assembly parser. Some directives are target
1918 // specific or may potentially behave differently on certain targets.
1919 // 2. Asm parser extensions. For example, platform-specific parsers
1920 // (like the ELF parser) register themselves as extensions.
1921 // 3. The generic directive parser implemented by this class. These are
1922 // all the directives that behave in a target and platform independent
1923 // manner, or at least have a default behavior that's shared between
1924 // all targets and platforms.
1925
1926 getTargetParser().flushPendingInstructions(Out&: getStreamer());
1927
1928 ParseStatus TPDirectiveReturn = getTargetParser().parseDirective(DirectiveID: ID);
1929 assert(TPDirectiveReturn.isFailure() == hasPendingError() &&
1930 "Should only return Failure iff there was an error");
1931 if (TPDirectiveReturn.isFailure())
1932 return true;
1933 if (TPDirectiveReturn.isSuccess())
1934 return false;
1935
1936 // Next, check the extension directive map to see if any extension has
1937 // registered itself to parse this directive.
1938 std::pair<MCAsmParserExtension *, DirectiveHandler> Handler =
1939 ExtensionDirectiveMap.lookup(Key: IDVal);
1940 if (Handler.first)
1941 return (*Handler.second)(Handler.first, IDVal, IDLoc);
1942
1943 // Finally, if no one else is interested in this directive, it must be
1944 // generic and familiar to this class.
1945 switch (DirKind) {
1946 default:
1947 break;
1948 case DK_SET:
1949 case DK_EQU:
1950 return parseDirectiveSet(IDVal, Kind: AssignmentKind::Set);
1951 case DK_EQUIV:
1952 return parseDirectiveSet(IDVal, Kind: AssignmentKind::Equiv);
1953 case DK_LTO_SET_CONDITIONAL:
1954 return parseDirectiveSet(IDVal, Kind: AssignmentKind::LTOSetConditional);
1955 case DK_ASCII:
1956 return parseDirectiveAscii(IDVal, ZeroTerminated: false);
1957 case DK_ASCIZ:
1958 case DK_STRING:
1959 return parseDirectiveAscii(IDVal, ZeroTerminated: true);
1960 case DK_BYTE:
1961 case DK_DC_B:
1962 return parseDirectiveValue(IDVal, Size: 1);
1963 case DK_DC:
1964 case DK_DC_W:
1965 case DK_SHORT:
1966 case DK_VALUE:
1967 case DK_2BYTE:
1968 return parseDirectiveValue(IDVal, Size: 2);
1969 case DK_LONG:
1970 case DK_INT:
1971 case DK_4BYTE:
1972 case DK_DC_L:
1973 return parseDirectiveValue(IDVal, Size: 4);
1974 case DK_QUAD:
1975 case DK_8BYTE:
1976 return parseDirectiveValue(IDVal, Size: 8);
1977 case DK_DC_A:
1978 return parseDirectiveValue(
1979 IDVal, Size: getContext().getAsmInfo()->getCodePointerSize());
1980 case DK_OCTA:
1981 return parseDirectiveOctaValue(IDVal);
1982 case DK_SINGLE:
1983 case DK_FLOAT:
1984 case DK_DC_S:
1985 return parseDirectiveRealValue(IDVal, APFloat::IEEEsingle());
1986 case DK_DOUBLE:
1987 case DK_DC_D:
1988 return parseDirectiveRealValue(IDVal, APFloat::IEEEdouble());
1989 case DK_ALIGN: {
1990 bool IsPow2 = !getContext().getAsmInfo()->getAlignmentIsInBytes();
1991 return parseDirectiveAlign(IsPow2, /*ExprSize=*/ValueSize: 1);
1992 }
1993 case DK_ALIGN32: {
1994 bool IsPow2 = !getContext().getAsmInfo()->getAlignmentIsInBytes();
1995 return parseDirectiveAlign(IsPow2, /*ExprSize=*/ValueSize: 4);
1996 }
1997 case DK_BALIGN:
1998 return parseDirectiveAlign(/*IsPow2=*/false, /*ExprSize=*/ValueSize: 1);
1999 case DK_BALIGNW:
2000 return parseDirectiveAlign(/*IsPow2=*/false, /*ExprSize=*/ValueSize: 2);
2001 case DK_BALIGNL:
2002 return parseDirectiveAlign(/*IsPow2=*/false, /*ExprSize=*/ValueSize: 4);
2003 case DK_P2ALIGN:
2004 return parseDirectiveAlign(/*IsPow2=*/true, /*ExprSize=*/ValueSize: 1);
2005 case DK_P2ALIGNW:
2006 return parseDirectiveAlign(/*IsPow2=*/true, /*ExprSize=*/ValueSize: 2);
2007 case DK_P2ALIGNL:
2008 return parseDirectiveAlign(/*IsPow2=*/true, /*ExprSize=*/ValueSize: 4);
2009 case DK_ORG:
2010 return parseDirectiveOrg();
2011 case DK_FILL:
2012 return parseDirectiveFill();
2013 case DK_ZERO:
2014 return parseDirectiveZero();
2015 case DK_EXTERN:
2016 eatToEndOfStatement(); // .extern is the default, ignore it.
2017 return false;
2018 case DK_GLOBL:
2019 case DK_GLOBAL:
2020 return parseDirectiveSymbolAttribute(Attr: MCSA_Global);
2021 case DK_LAZY_REFERENCE:
2022 return parseDirectiveSymbolAttribute(Attr: MCSA_LazyReference);
2023 case DK_NO_DEAD_STRIP:
2024 return parseDirectiveSymbolAttribute(Attr: MCSA_NoDeadStrip);
2025 case DK_SYMBOL_RESOLVER:
2026 return parseDirectiveSymbolAttribute(Attr: MCSA_SymbolResolver);
2027 case DK_PRIVATE_EXTERN:
2028 return parseDirectiveSymbolAttribute(Attr: MCSA_PrivateExtern);
2029 case DK_REFERENCE:
2030 return parseDirectiveSymbolAttribute(Attr: MCSA_Reference);
2031 case DK_WEAK_DEFINITION:
2032 return parseDirectiveSymbolAttribute(Attr: MCSA_WeakDefinition);
2033 case DK_WEAK_REFERENCE:
2034 return parseDirectiveSymbolAttribute(Attr: MCSA_WeakReference);
2035 case DK_WEAK_DEF_CAN_BE_HIDDEN:
2036 return parseDirectiveSymbolAttribute(Attr: MCSA_WeakDefAutoPrivate);
2037 case DK_COLD:
2038 return parseDirectiveSymbolAttribute(Attr: MCSA_Cold);
2039 case DK_COMM:
2040 case DK_COMMON:
2041 return parseDirectiveComm(/*IsLocal=*/false);
2042 case DK_LCOMM:
2043 return parseDirectiveComm(/*IsLocal=*/true);
2044 case DK_ABORT:
2045 return parseDirectiveAbort(DirectiveLoc: IDLoc);
2046 case DK_INCLUDE:
2047 return parseDirectiveInclude();
2048 case DK_INCBIN:
2049 return parseDirectiveIncbin();
2050 case DK_CODE16:
2051 case DK_CODE16GCC:
2052 return TokError(Msg: Twine(IDVal) +
2053 " not currently supported for this target");
2054 case DK_REPT:
2055 return parseDirectiveRept(DirectiveLoc: IDLoc, Directive: IDVal);
2056 case DK_IRP:
2057 return parseDirectiveIrp(DirectiveLoc: IDLoc);
2058 case DK_IRPC:
2059 return parseDirectiveIrpc(DirectiveLoc: IDLoc);
2060 case DK_ENDR:
2061 return parseDirectiveEndr(DirectiveLoc: IDLoc);
2062 case DK_BUNDLE_ALIGN_MODE:
2063 return parseDirectiveBundleAlignMode();
2064 case DK_BUNDLE_LOCK:
2065 return parseDirectiveBundleLock();
2066 case DK_BUNDLE_UNLOCK:
2067 return parseDirectiveBundleUnlock();
2068 case DK_SLEB128:
2069 return parseDirectiveLEB128(Signed: true);
2070 case DK_ULEB128:
2071 return parseDirectiveLEB128(Signed: false);
2072 case DK_SPACE:
2073 case DK_SKIP:
2074 return parseDirectiveSpace(IDVal);
2075 case DK_FILE:
2076 return parseDirectiveFile(DirectiveLoc: IDLoc);
2077 case DK_LINE:
2078 return parseDirectiveLine();
2079 case DK_LOC:
2080 return parseDirectiveLoc();
2081 case DK_LOC_LABEL:
2082 return parseDirectiveLocLabel(DirectiveLoc: IDLoc);
2083 case DK_STABS:
2084 return parseDirectiveStabs();
2085 case DK_CV_FILE:
2086 return parseDirectiveCVFile();
2087 case DK_CV_FUNC_ID:
2088 return parseDirectiveCVFuncId();
2089 case DK_CV_INLINE_SITE_ID:
2090 return parseDirectiveCVInlineSiteId();
2091 case DK_CV_LOC:
2092 return parseDirectiveCVLoc();
2093 case DK_CV_LINETABLE:
2094 return parseDirectiveCVLinetable();
2095 case DK_CV_INLINE_LINETABLE:
2096 return parseDirectiveCVInlineLinetable();
2097 case DK_CV_DEF_RANGE:
2098 return parseDirectiveCVDefRange();
2099 case DK_CV_STRING:
2100 return parseDirectiveCVString();
2101 case DK_CV_STRINGTABLE:
2102 return parseDirectiveCVStringTable();
2103 case DK_CV_FILECHECKSUMS:
2104 return parseDirectiveCVFileChecksums();
2105 case DK_CV_FILECHECKSUM_OFFSET:
2106 return parseDirectiveCVFileChecksumOffset();
2107 case DK_CV_FPO_DATA:
2108 return parseDirectiveCVFPOData();
2109 case DK_CFI_SECTIONS:
2110 return parseDirectiveCFISections();
2111 case DK_CFI_STARTPROC:
2112 return parseDirectiveCFIStartProc();
2113 case DK_CFI_ENDPROC:
2114 return parseDirectiveCFIEndProc();
2115 case DK_CFI_DEF_CFA:
2116 return parseDirectiveCFIDefCfa(DirectiveLoc: IDLoc);
2117 case DK_CFI_DEF_CFA_OFFSET:
2118 return parseDirectiveCFIDefCfaOffset(DirectiveLoc: IDLoc);
2119 case DK_CFI_ADJUST_CFA_OFFSET:
2120 return parseDirectiveCFIAdjustCfaOffset(DirectiveLoc: IDLoc);
2121 case DK_CFI_DEF_CFA_REGISTER:
2122 return parseDirectiveCFIDefCfaRegister(DirectiveLoc: IDLoc);
2123 case DK_CFI_LLVM_DEF_ASPACE_CFA:
2124 return parseDirectiveCFILLVMDefAspaceCfa(DirectiveLoc: IDLoc);
2125 case DK_CFI_OFFSET:
2126 return parseDirectiveCFIOffset(DirectiveLoc: IDLoc);
2127 case DK_CFI_REL_OFFSET:
2128 return parseDirectiveCFIRelOffset(DirectiveLoc: IDLoc);
2129 case DK_CFI_PERSONALITY:
2130 return parseDirectiveCFIPersonalityOrLsda(IsPersonality: true);
2131 case DK_CFI_LSDA:
2132 return parseDirectiveCFIPersonalityOrLsda(IsPersonality: false);
2133 case DK_CFI_REMEMBER_STATE:
2134 return parseDirectiveCFIRememberState(DirectiveLoc: IDLoc);
2135 case DK_CFI_RESTORE_STATE:
2136 return parseDirectiveCFIRestoreState(DirectiveLoc: IDLoc);
2137 case DK_CFI_SAME_VALUE:
2138 return parseDirectiveCFISameValue(DirectiveLoc: IDLoc);
2139 case DK_CFI_RESTORE:
2140 return parseDirectiveCFIRestore(DirectiveLoc: IDLoc);
2141 case DK_CFI_ESCAPE:
2142 return parseDirectiveCFIEscape(DirectiveLoc: IDLoc);
2143 case DK_CFI_RETURN_COLUMN:
2144 return parseDirectiveCFIReturnColumn(DirectiveLoc: IDLoc);
2145 case DK_CFI_SIGNAL_FRAME:
2146 return parseDirectiveCFISignalFrame(DirectiveLoc: IDLoc);
2147 case DK_CFI_UNDEFINED:
2148 return parseDirectiveCFIUndefined(DirectiveLoc: IDLoc);
2149 case DK_CFI_REGISTER:
2150 return parseDirectiveCFIRegister(DirectiveLoc: IDLoc);
2151 case DK_CFI_WINDOW_SAVE:
2152 return parseDirectiveCFIWindowSave(DirectiveLoc: IDLoc);
2153 case DK_CFI_LABEL:
2154 return parseDirectiveCFILabel(DirectiveLoc: IDLoc);
2155 case DK_CFI_VAL_OFFSET:
2156 return parseDirectiveCFIValOffset(DirectiveLoc: IDLoc);
2157 case DK_MACROS_ON:
2158 case DK_MACROS_OFF:
2159 return parseDirectiveMacrosOnOff(Directive: IDVal);
2160 case DK_MACRO:
2161 return parseDirectiveMacro(DirectiveLoc: IDLoc);
2162 case DK_ALTMACRO:
2163 case DK_NOALTMACRO:
2164 return parseDirectiveAltmacro(Directive: IDVal);
2165 case DK_EXITM:
2166 return parseDirectiveExitMacro(Directive: IDVal);
2167 case DK_ENDM:
2168 case DK_ENDMACRO:
2169 return parseDirectiveEndMacro(Directive: IDVal);
2170 case DK_PURGEM:
2171 return parseDirectivePurgeMacro(DirectiveLoc: IDLoc);
2172 case DK_END:
2173 return parseDirectiveEnd(DirectiveLoc: IDLoc);
2174 case DK_ERR:
2175 return parseDirectiveError(DirectiveLoc: IDLoc, WithMessage: false);
2176 case DK_ERROR:
2177 return parseDirectiveError(DirectiveLoc: IDLoc, WithMessage: true);
2178 case DK_WARNING:
2179 return parseDirectiveWarning(DirectiveLoc: IDLoc);
2180 case DK_RELOC:
2181 return parseDirectiveReloc(DirectiveLoc: IDLoc);
2182 case DK_DCB:
2183 case DK_DCB_W:
2184 return parseDirectiveDCB(IDVal, Size: 2);
2185 case DK_DCB_B:
2186 return parseDirectiveDCB(IDVal, Size: 1);
2187 case DK_DCB_D:
2188 return parseDirectiveRealDCB(IDVal, APFloat::IEEEdouble());
2189 case DK_DCB_L:
2190 return parseDirectiveDCB(IDVal, Size: 4);
2191 case DK_DCB_S:
2192 return parseDirectiveRealDCB(IDVal, APFloat::IEEEsingle());
2193 case DK_DC_X:
2194 case DK_DCB_X:
2195 return TokError(Msg: Twine(IDVal) +
2196 " not currently supported for this target");
2197 case DK_DS:
2198 case DK_DS_W:
2199 return parseDirectiveDS(IDVal, Size: 2);
2200 case DK_DS_B:
2201 return parseDirectiveDS(IDVal, Size: 1);
2202 case DK_DS_D:
2203 return parseDirectiveDS(IDVal, Size: 8);
2204 case DK_DS_L:
2205 case DK_DS_S:
2206 return parseDirectiveDS(IDVal, Size: 4);
2207 case DK_DS_P:
2208 case DK_DS_X:
2209 return parseDirectiveDS(IDVal, Size: 12);
2210 case DK_PRINT:
2211 return parseDirectivePrint(DirectiveLoc: IDLoc);
2212 case DK_ADDRSIG:
2213 return parseDirectiveAddrsig();
2214 case DK_ADDRSIG_SYM:
2215 return parseDirectiveAddrsigSym();
2216 case DK_PSEUDO_PROBE:
2217 return parseDirectivePseudoProbe();
2218 case DK_LTO_DISCARD:
2219 return parseDirectiveLTODiscard();
2220 case DK_MEMTAG:
2221 return parseDirectiveSymbolAttribute(Attr: MCSA_Memtag);
2222 }
2223
2224 return Error(L: IDLoc, Msg: "unknown directive");
2225 }
2226
2227 // __asm _emit or __asm __emit
2228 if (ParsingMSInlineAsm && (IDVal == "_emit" || IDVal == "__emit" ||
2229 IDVal == "_EMIT" || IDVal == "__EMIT"))
2230 return parseDirectiveMSEmit(DirectiveLoc: IDLoc, Info, Len: IDVal.size());
2231
2232 // __asm align
2233 if (ParsingMSInlineAsm && (IDVal == "align" || IDVal == "ALIGN"))
2234 return parseDirectiveMSAlign(DirectiveLoc: IDLoc, Info);
2235
2236 if (ParsingMSInlineAsm && (IDVal == "even" || IDVal == "EVEN"))
2237 Info.AsmRewrites->emplace_back(Args: AOK_EVEN, Args&: IDLoc, Args: 4);
2238 if (checkForValidSection())
2239 return true;
2240
2241 return parseAndMatchAndEmitTargetInstruction(Info, IDVal, ID, IDLoc);
2242}
2243
2244bool AsmParser::parseAndMatchAndEmitTargetInstruction(ParseStatementInfo &Info,
2245 StringRef IDVal,
2246 AsmToken ID,
2247 SMLoc IDLoc) {
2248 // Canonicalize the opcode to lower case.
2249 std::string OpcodeStr = IDVal.lower();
2250 ParseInstructionInfo IInfo(Info.AsmRewrites);
2251 bool ParseHadError = getTargetParser().parseInstruction(Info&: IInfo, Name: OpcodeStr, Token: ID,
2252 Operands&: Info.ParsedOperands);
2253 Info.ParseError = ParseHadError;
2254
2255 // Dump the parsed representation, if requested.
2256 if (getShowParsedOperands()) {
2257 SmallString<256> Str;
2258 raw_svector_ostream OS(Str);
2259 OS << "parsed instruction: [";
2260 for (unsigned i = 0; i != Info.ParsedOperands.size(); ++i) {
2261 if (i != 0)
2262 OS << ", ";
2263 Info.ParsedOperands[i]->print(OS, MAI);
2264 }
2265 OS << "]";
2266
2267 printMessage(Loc: IDLoc, Kind: SourceMgr::DK_Note, Msg: OS.str());
2268 }
2269
2270 // Fail even if ParseInstruction erroneously returns false.
2271 if (hasPendingError() || ParseHadError)
2272 return true;
2273
2274 // If we are generating dwarf for the current section then generate a .loc
2275 // directive for the instruction.
2276 if (!ParseHadError && enabledGenDwarfForAssembly() &&
2277 getContext().getGenDwarfSectionSyms().count(
2278 key: getStreamer().getCurrentSectionOnly())) {
2279 unsigned Line;
2280 if (ActiveMacros.empty())
2281 Line = SrcMgr.FindLineNumber(Loc: IDLoc, BufferID: CurBuffer);
2282 else
2283 Line = SrcMgr.FindLineNumber(Loc: ActiveMacros.front()->InstantiationLoc,
2284 BufferID: ActiveMacros.front()->ExitBuffer);
2285
2286 // If we previously parsed a cpp hash file line comment then make sure the
2287 // current Dwarf File is for the CppHashFilename if not then emit the
2288 // Dwarf File table for it and adjust the line number for the .loc.
2289 if (!CppHashInfo.Filename.empty()) {
2290 unsigned FileNumber = getStreamer().emitDwarfFileDirective(
2291 FileNo: 0, Directory: StringRef(), Filename: CppHashInfo.Filename);
2292 getContext().setGenDwarfFileNumber(FileNumber);
2293
2294 unsigned CppHashLocLineNo =
2295 SrcMgr.FindLineNumber(Loc: CppHashInfo.Loc, BufferID: CppHashInfo.Buf);
2296 Line = CppHashInfo.LineNumber - 1 + (Line - CppHashLocLineNo);
2297 }
2298
2299 getStreamer().emitDwarfLocDirective(
2300 FileNo: getContext().getGenDwarfFileNumber(), Line, Column: 0,
2301 DWARF2_LINE_DEFAULT_IS_STMT ? DWARF2_FLAG_IS_STMT : 0, Isa: 0, Discriminator: 0,
2302 FileName: StringRef());
2303 }
2304
2305 // If parsing succeeded, match the instruction.
2306 if (!ParseHadError) {
2307 uint64_t ErrorInfo;
2308 if (getTargetParser().matchAndEmitInstruction(
2309 IDLoc, Opcode&: Info.Opcode, Operands&: Info.ParsedOperands, Out, ErrorInfo,
2310 MatchingInlineAsm: getTargetParser().isParsingMSInlineAsm()))
2311 return true;
2312 }
2313 return false;
2314}
2315
2316// Parse and erase curly braces marking block start/end
2317bool
2318AsmParser::parseCurlyBlockScope(SmallVectorImpl<AsmRewrite> &AsmStrRewrites) {
2319 // Identify curly brace marking block start/end
2320 if (Lexer.isNot(K: AsmToken::LCurly) && Lexer.isNot(K: AsmToken::RCurly))
2321 return false;
2322
2323 SMLoc StartLoc = Lexer.getLoc();
2324 Lex(); // Eat the brace
2325 if (Lexer.is(K: AsmToken::EndOfStatement))
2326 Lex(); // Eat EndOfStatement following the brace
2327
2328 // Erase the block start/end brace from the output asm string
2329 AsmStrRewrites.emplace_back(Args: AOK_Skip, Args&: StartLoc, Args: Lexer.getLoc().getPointer() -
2330 StartLoc.getPointer());
2331 return true;
2332}
2333
2334/// parseCppHashLineFilenameComment as this:
2335/// ::= # number "filename"
2336bool AsmParser::parseCppHashLineFilenameComment(SMLoc L, bool SaveLocInfo) {
2337 Lex(); // Eat the hash token.
2338 // Lexer only ever emits HashDirective if it fully formed if it's
2339 // done the checking already so this is an internal error.
2340 assert(getTok().is(AsmToken::Integer) &&
2341 "Lexing Cpp line comment: Expected Integer");
2342 int64_t LineNumber = getTok().getIntVal();
2343 Lex();
2344 assert(getTok().is(AsmToken::String) &&
2345 "Lexing Cpp line comment: Expected String");
2346 StringRef Filename = getTok().getString();
2347 Lex();
2348
2349 if (!SaveLocInfo)
2350 return false;
2351
2352 // Get rid of the enclosing quotes.
2353 Filename = Filename.substr(Start: 1, N: Filename.size() - 2);
2354
2355 // Save the SMLoc, Filename and LineNumber for later use by diagnostics
2356 // and possibly DWARF file info.
2357 CppHashInfo.Loc = L;
2358 CppHashInfo.Filename = Filename;
2359 CppHashInfo.LineNumber = LineNumber;
2360 CppHashInfo.Buf = CurBuffer;
2361 if (!HadCppHashFilename) {
2362 HadCppHashFilename = true;
2363 // If we haven't encountered any .file directives, then the first #line
2364 // directive describes the "root" file and directory of the compilation
2365 // unit.
2366 if (getContext().getGenDwarfForAssembly() &&
2367 getContext().getGenDwarfFileNumber() == 0) {
2368 // It's preprocessed, so there is no checksum, and of course no source
2369 // directive.
2370 getContext().setMCLineTableRootFile(
2371 /*CUID=*/0, CompilationDir: getContext().getCompilationDir(), Filename,
2372 /*Cksum=*/Checksum: std::nullopt, /*Source=*/std::nullopt);
2373 }
2374 }
2375 return false;
2376}
2377
2378/// will use the last parsed cpp hash line filename comment
2379/// for the Filename and LineNo if any in the diagnostic.
2380void AsmParser::DiagHandler(const SMDiagnostic &Diag, void *Context) {
2381 auto *Parser = static_cast<AsmParser *>(Context);
2382 raw_ostream &OS = errs();
2383
2384 const SourceMgr &DiagSrcMgr = *Diag.getSourceMgr();
2385 SMLoc DiagLoc = Diag.getLoc();
2386 unsigned DiagBuf = DiagSrcMgr.FindBufferContainingLoc(Loc: DiagLoc);
2387 unsigned CppHashBuf =
2388 Parser->SrcMgr.FindBufferContainingLoc(Loc: Parser->CppHashInfo.Loc);
2389
2390 // Like SourceMgr::printMessage() we need to print the include stack if any
2391 // before printing the message.
2392 unsigned DiagCurBuffer = DiagSrcMgr.FindBufferContainingLoc(Loc: DiagLoc);
2393 if (!Parser->SavedDiagHandler && DiagCurBuffer &&
2394 DiagCurBuffer != DiagSrcMgr.getMainFileID()) {
2395 SMLoc ParentIncludeLoc = DiagSrcMgr.getParentIncludeLoc(i: DiagCurBuffer);
2396 DiagSrcMgr.PrintIncludeStack(IncludeLoc: ParentIncludeLoc, OS);
2397 }
2398
2399 // If we have not parsed a cpp hash line filename comment or the source
2400 // manager changed or buffer changed (like in a nested include) then just
2401 // print the normal diagnostic using its Filename and LineNo.
2402 if (!Parser->CppHashInfo.LineNumber || DiagBuf != CppHashBuf) {
2403 if (Parser->SavedDiagHandler)
2404 Parser->SavedDiagHandler(Diag, Parser->SavedDiagContext);
2405 else
2406 Parser->getContext().diagnose(SMD: Diag);
2407 return;
2408 }
2409
2410 // Use the CppHashFilename and calculate a line number based on the
2411 // CppHashInfo.Loc and CppHashInfo.LineNumber relative to this Diag's SMLoc
2412 // for the diagnostic.
2413 const std::string &Filename = std::string(Parser->CppHashInfo.Filename);
2414
2415 int DiagLocLineNo = DiagSrcMgr.FindLineNumber(Loc: DiagLoc, BufferID: DiagBuf);
2416 int CppHashLocLineNo =
2417 Parser->SrcMgr.FindLineNumber(Loc: Parser->CppHashInfo.Loc, BufferID: CppHashBuf);
2418 int LineNo =
2419 Parser->CppHashInfo.LineNumber - 1 + (DiagLocLineNo - CppHashLocLineNo);
2420
2421 SMDiagnostic NewDiag(*Diag.getSourceMgr(), Diag.getLoc(), Filename, LineNo,
2422 Diag.getColumnNo(), Diag.getKind(), Diag.getMessage(),
2423 Diag.getLineContents(), Diag.getRanges());
2424
2425 if (Parser->SavedDiagHandler)
2426 Parser->SavedDiagHandler(Diag, Parser->SavedDiagContext);
2427 else
2428 Parser->getContext().diagnose(SMD: NewDiag);
2429}
2430
2431// FIXME: This is mostly duplicated from the function in AsmLexer.cpp. The
2432// difference being that that function accepts '@' as part of identifiers and
2433// we can't do that. AsmLexer.cpp should probably be changed to handle
2434// '@' as a special case when needed.
2435static bool isIdentifierChar(char c) {
2436 return isalnum(static_cast<unsigned char>(c)) || c == '_' || c == '$' ||
2437 c == '.';
2438}
2439
2440bool AsmParser::expandMacro(raw_svector_ostream &OS, MCAsmMacro &Macro,
2441 ArrayRef<MCAsmMacroParameter> Parameters,
2442 ArrayRef<MCAsmMacroArgument> A,
2443 bool EnableAtPseudoVariable) {
2444 unsigned NParameters = Parameters.size();
2445 auto expandArg = [&](unsigned Index) {
2446 bool HasVararg = NParameters ? Parameters.back().Vararg : false;
2447 bool VarargParameter = HasVararg && Index == (NParameters - 1);
2448 for (const AsmToken &Token : A[Index])
2449 // For altmacro mode, you can write '%expr'.
2450 // The prefix '%' evaluates the expression 'expr'
2451 // and uses the result as a string (e.g. replace %(1+2) with the
2452 // string "3").
2453 // Here, we identify the integer token which is the result of the
2454 // absolute expression evaluation and replace it with its string
2455 // representation.
2456 if (AltMacroMode && Token.getString().front() == '%' &&
2457 Token.is(K: AsmToken::Integer))
2458 // Emit an integer value to the buffer.
2459 OS << Token.getIntVal();
2460 // Only Token that was validated as a string and begins with '<'
2461 // is considered altMacroString!!!
2462 else if (AltMacroMode && Token.getString().front() == '<' &&
2463 Token.is(K: AsmToken::String)) {
2464 OS << angleBracketString(AltMacroStr: Token.getStringContents());
2465 }
2466 // We expect no quotes around the string's contents when
2467 // parsing for varargs.
2468 else if (Token.isNot(K: AsmToken::String) || VarargParameter)
2469 OS << Token.getString();
2470 else
2471 OS << Token.getStringContents();
2472 };
2473
2474 // A macro without parameters is handled differently on Darwin:
2475 // gas accepts no arguments and does no substitutions
2476 StringRef Body = Macro.Body;
2477 size_t I = 0, End = Body.size();
2478 while (I != End) {
2479 if (Body[I] == '\\' && I + 1 != End) {
2480 // Check for \@ and \+ pseudo variables.
2481 if (EnableAtPseudoVariable && Body[I + 1] == '@') {
2482 OS << NumOfMacroInstantiations;
2483 I += 2;
2484 continue;
2485 }
2486 if (Body[I + 1] == '+') {
2487 OS << Macro.Count;
2488 I += 2;
2489 continue;
2490 }
2491 if (Body[I + 1] == '(' && Body[I + 2] == ')') {
2492 I += 3;
2493 continue;
2494 }
2495
2496 size_t Pos = ++I;
2497 while (I != End && isIdentifierChar(c: Body[I]))
2498 ++I;
2499 StringRef Argument(Body.data() + Pos, I - Pos);
2500 if (AltMacroMode && I != End && Body[I] == '&')
2501 ++I;
2502 unsigned Index = 0;
2503 for (; Index < NParameters; ++Index)
2504 if (Parameters[Index].Name == Argument)
2505 break;
2506 if (Index == NParameters)
2507 OS << '\\' << Argument;
2508 else
2509 expandArg(Index);
2510 continue;
2511 }
2512
2513 // In Darwin mode, $ is used for macro expansion, not considered an
2514 // identifier char.
2515 if (Body[I] == '$' && I + 1 != End && IsDarwin && !NParameters) {
2516 // This macro has no parameters, look for $0, $1, etc.
2517 switch (Body[I + 1]) {
2518 // $$ => $
2519 case '$':
2520 OS << '$';
2521 I += 2;
2522 continue;
2523 // $n => number of arguments
2524 case 'n':
2525 OS << A.size();
2526 I += 2;
2527 continue;
2528 default: {
2529 if (!isDigit(C: Body[I + 1]))
2530 break;
2531 // $[0-9] => argument
2532 // Missing arguments are ignored.
2533 unsigned Index = Body[I + 1] - '0';
2534 if (Index < A.size())
2535 for (const AsmToken &Token : A[Index])
2536 OS << Token.getString();
2537 I += 2;
2538 continue;
2539 }
2540 }
2541 }
2542
2543 if (!isIdentifierChar(c: Body[I]) || IsDarwin) {
2544 OS << Body[I++];
2545 continue;
2546 }
2547
2548 const size_t Start = I;
2549 while (++I && isIdentifierChar(c: Body[I])) {
2550 }
2551 StringRef Token(Body.data() + Start, I - Start);
2552 if (AltMacroMode) {
2553 unsigned Index = 0;
2554 for (; Index != NParameters; ++Index)
2555 if (Parameters[Index].Name == Token)
2556 break;
2557 if (Index != NParameters) {
2558 expandArg(Index);
2559 if (I != End && Body[I] == '&')
2560 ++I;
2561 continue;
2562 }
2563 }
2564 OS << Token;
2565 }
2566
2567 ++Macro.Count;
2568 return false;
2569}
2570
2571static bool isOperator(AsmToken::TokenKind kind) {
2572 switch (kind) {
2573 default:
2574 return false;
2575 case AsmToken::Plus:
2576 case AsmToken::Minus:
2577 case AsmToken::Tilde:
2578 case AsmToken::Slash:
2579 case AsmToken::Star:
2580 case AsmToken::Dot:
2581 case AsmToken::Equal:
2582 case AsmToken::EqualEqual:
2583 case AsmToken::Pipe:
2584 case AsmToken::PipePipe:
2585 case AsmToken::Caret:
2586 case AsmToken::Amp:
2587 case AsmToken::AmpAmp:
2588 case AsmToken::Exclaim:
2589 case AsmToken::ExclaimEqual:
2590 case AsmToken::Less:
2591 case AsmToken::LessEqual:
2592 case AsmToken::LessLess:
2593 case AsmToken::LessGreater:
2594 case AsmToken::Greater:
2595 case AsmToken::GreaterEqual:
2596 case AsmToken::GreaterGreater:
2597 return true;
2598 }
2599}
2600
2601namespace {
2602
2603class AsmLexerSkipSpaceRAII {
2604public:
2605 AsmLexerSkipSpaceRAII(AsmLexer &Lexer, bool SkipSpace) : Lexer(Lexer) {
2606 Lexer.setSkipSpace(SkipSpace);
2607 }
2608
2609 ~AsmLexerSkipSpaceRAII() {
2610 Lexer.setSkipSpace(true);
2611 }
2612
2613private:
2614 AsmLexer &Lexer;
2615};
2616
2617} // end anonymous namespace
2618
2619bool AsmParser::parseMacroArgument(MCAsmMacroArgument &MA, bool Vararg) {
2620
2621 if (Vararg) {
2622 if (Lexer.isNot(K: AsmToken::EndOfStatement)) {
2623 StringRef Str = parseStringToEndOfStatement();
2624 MA.emplace_back(args: AsmToken::String, args&: Str);
2625 }
2626 return false;
2627 }
2628
2629 unsigned ParenLevel = 0;
2630
2631 // Darwin doesn't use spaces to delmit arguments.
2632 AsmLexerSkipSpaceRAII ScopedSkipSpace(Lexer, IsDarwin);
2633
2634 bool SpaceEaten;
2635
2636 while (true) {
2637 SpaceEaten = false;
2638 if (Lexer.is(K: AsmToken::Eof) || Lexer.is(K: AsmToken::Equal))
2639 return TokError(Msg: "unexpected token in macro instantiation");
2640
2641 if (ParenLevel == 0) {
2642
2643 if (Lexer.is(K: AsmToken::Comma))
2644 break;
2645
2646 if (parseOptionalToken(T: AsmToken::Space))
2647 SpaceEaten = true;
2648
2649 // Spaces can delimit parameters, but could also be part an expression.
2650 // If the token after a space is an operator, add the token and the next
2651 // one into this argument
2652 if (!IsDarwin) {
2653 if (isOperator(kind: Lexer.getKind())) {
2654 MA.push_back(x: getTok());
2655 Lexer.Lex();
2656
2657 // Whitespace after an operator can be ignored.
2658 parseOptionalToken(T: AsmToken::Space);
2659 continue;
2660 }
2661 }
2662 if (SpaceEaten)
2663 break;
2664 }
2665
2666 // handleMacroEntry relies on not advancing the lexer here
2667 // to be able to fill in the remaining default parameter values
2668 if (Lexer.is(K: AsmToken::EndOfStatement))
2669 break;
2670
2671 // Adjust the current parentheses level.
2672 if (Lexer.is(K: AsmToken::LParen))
2673 ++ParenLevel;
2674 else if (Lexer.is(K: AsmToken::RParen) && ParenLevel)
2675 --ParenLevel;
2676
2677 // Append the token to the current argument list.
2678 MA.push_back(x: getTok());
2679 Lexer.Lex();
2680 }
2681
2682 if (ParenLevel != 0)
2683 return TokError(Msg: "unbalanced parentheses in macro argument");
2684 return false;
2685}
2686
2687// Parse the macro instantiation arguments.
2688bool AsmParser::parseMacroArguments(const MCAsmMacro *M,
2689 MCAsmMacroArguments &A) {
2690 const unsigned NParameters = M ? M->Parameters.size() : 0;
2691 bool NamedParametersFound = false;
2692 SmallVector<SMLoc, 4> FALocs;
2693
2694 A.resize(new_size: NParameters);
2695 FALocs.resize(N: NParameters);
2696
2697 // Parse two kinds of macro invocations:
2698 // - macros defined without any parameters accept an arbitrary number of them
2699 // - macros defined with parameters accept at most that many of them
2700 bool HasVararg = NParameters ? M->Parameters.back().Vararg : false;
2701 for (unsigned Parameter = 0; !NParameters || Parameter < NParameters;
2702 ++Parameter) {
2703 SMLoc IDLoc = Lexer.getLoc();
2704 MCAsmMacroParameter FA;
2705
2706 if (Lexer.is(K: AsmToken::Identifier) && Lexer.peekTok().is(K: AsmToken::Equal)) {
2707 if (parseIdentifier(Res&: FA.Name))
2708 return Error(L: IDLoc, Msg: "invalid argument identifier for formal argument");
2709
2710 if (Lexer.isNot(K: AsmToken::Equal))
2711 return TokError(Msg: "expected '=' after formal parameter identifier");
2712
2713 Lex();
2714
2715 NamedParametersFound = true;
2716 }
2717 bool Vararg = HasVararg && Parameter == (NParameters - 1);
2718
2719 if (NamedParametersFound && FA.Name.empty())
2720 return Error(L: IDLoc, Msg: "cannot mix positional and keyword arguments");
2721
2722 SMLoc StrLoc = Lexer.getLoc();
2723 SMLoc EndLoc;
2724 if (AltMacroMode && Lexer.is(K: AsmToken::Percent)) {
2725 const MCExpr *AbsoluteExp;
2726 int64_t Value;
2727 /// Eat '%'
2728 Lex();
2729 if (parseExpression(Res&: AbsoluteExp, EndLoc))
2730 return false;
2731 if (!AbsoluteExp->evaluateAsAbsolute(Res&: Value,
2732 Asm: getStreamer().getAssemblerPtr()))
2733 return Error(L: StrLoc, Msg: "expected absolute expression");
2734 const char *StrChar = StrLoc.getPointer();
2735 const char *EndChar = EndLoc.getPointer();
2736 AsmToken newToken(AsmToken::Integer,
2737 StringRef(StrChar, EndChar - StrChar), Value);
2738 FA.Value.push_back(x: newToken);
2739 } else if (AltMacroMode && Lexer.is(K: AsmToken::Less) &&
2740 isAngleBracketString(StrLoc, EndLoc)) {
2741 const char *StrChar = StrLoc.getPointer();
2742 const char *EndChar = EndLoc.getPointer();
2743 jumpToLoc(Loc: EndLoc, InBuffer: CurBuffer);
2744 /// Eat from '<' to '>'
2745 Lex();
2746 AsmToken newToken(AsmToken::String,
2747 StringRef(StrChar, EndChar - StrChar));
2748 FA.Value.push_back(x: newToken);
2749 } else if(parseMacroArgument(MA&: FA.Value, Vararg))
2750 return true;
2751
2752 unsigned PI = Parameter;
2753 if (!FA.Name.empty()) {
2754 unsigned FAI = 0;
2755 for (FAI = 0; FAI < NParameters; ++FAI)
2756 if (M->Parameters[FAI].Name == FA.Name)
2757 break;
2758
2759 if (FAI >= NParameters) {
2760 assert(M && "expected macro to be defined");
2761 return Error(L: IDLoc, Msg: "parameter named '" + FA.Name +
2762 "' does not exist for macro '" + M->Name + "'");
2763 }
2764 PI = FAI;
2765 }
2766
2767 if (!FA.Value.empty()) {
2768 if (A.size() <= PI)
2769 A.resize(new_size: PI + 1);
2770 A[PI] = FA.Value;
2771
2772 if (FALocs.size() <= PI)
2773 FALocs.resize(N: PI + 1);
2774
2775 FALocs[PI] = Lexer.getLoc();
2776 }
2777
2778 // At the end of the statement, fill in remaining arguments that have
2779 // default values. If there aren't any, then the next argument is
2780 // required but missing
2781 if (Lexer.is(K: AsmToken::EndOfStatement)) {
2782 bool Failure = false;
2783 for (unsigned FAI = 0; FAI < NParameters; ++FAI) {
2784 if (A[FAI].empty()) {
2785 if (M->Parameters[FAI].Required) {
2786 Error(L: FALocs[FAI].isValid() ? FALocs[FAI] : Lexer.getLoc(),
2787 Msg: "missing value for required parameter "
2788 "'" + M->Parameters[FAI].Name + "' in macro '" + M->Name + "'");
2789 Failure = true;
2790 }
2791
2792 if (!M->Parameters[FAI].Value.empty())
2793 A[FAI] = M->Parameters[FAI].Value;
2794 }
2795 }
2796 return Failure;
2797 }
2798
2799 parseOptionalToken(T: AsmToken::Comma);
2800 }
2801
2802 return TokError(Msg: "too many positional arguments");
2803}
2804
2805bool AsmParser::handleMacroEntry(MCAsmMacro *M, SMLoc NameLoc) {
2806 // Arbitrarily limit macro nesting depth (default matches 'as'). We can
2807 // eliminate this, although we should protect against infinite loops.
2808 unsigned MaxNestingDepth = AsmMacroMaxNestingDepth;
2809 if (ActiveMacros.size() == MaxNestingDepth) {
2810 std::ostringstream MaxNestingDepthError;
2811 MaxNestingDepthError << "macros cannot be nested more than "
2812 << MaxNestingDepth << " levels deep."
2813 << " Use -asm-macro-max-nesting-depth to increase "
2814 "this limit.";
2815 return TokError(Msg: MaxNestingDepthError.str());
2816 }
2817
2818 MCAsmMacroArguments A;
2819 if (parseMacroArguments(M, A))
2820 return true;
2821
2822 // Macro instantiation is lexical, unfortunately. We construct a new buffer
2823 // to hold the macro body with substitutions.
2824 SmallString<256> Buf;
2825 raw_svector_ostream OS(Buf);
2826
2827 if ((!IsDarwin || M->Parameters.size()) && M->Parameters.size() != A.size())
2828 return Error(L: getTok().getLoc(), Msg: "Wrong number of arguments");
2829 if (expandMacro(OS, Macro&: *M, Parameters: M->Parameters, A, EnableAtPseudoVariable: true))
2830 return true;
2831
2832 // We include the .endmacro in the buffer as our cue to exit the macro
2833 // instantiation.
2834 OS << ".endmacro\n";
2835
2836 std::unique_ptr<MemoryBuffer> Instantiation =
2837 MemoryBuffer::getMemBufferCopy(InputData: OS.str(), BufferName: "<instantiation>");
2838
2839 // Create the macro instantiation object and add to the current macro
2840 // instantiation stack.
2841 MacroInstantiation *MI = new MacroInstantiation{
2842 .InstantiationLoc: NameLoc, .ExitBuffer: CurBuffer, .ExitLoc: getTok().getLoc(), .CondStackDepth: TheCondStack.size()};
2843 ActiveMacros.push_back(x: MI);
2844
2845 ++NumOfMacroInstantiations;
2846
2847 // Jump to the macro instantiation and prime the lexer.
2848 CurBuffer = SrcMgr.AddNewSourceBuffer(F: std::move(Instantiation), IncludeLoc: SMLoc());
2849 Lexer.setBuffer(Buf: SrcMgr.getMemoryBuffer(i: CurBuffer)->getBuffer());
2850 Lex();
2851
2852 return false;
2853}
2854
2855void AsmParser::handleMacroExit() {
2856 // Jump to the EndOfStatement we should return to, and consume it.
2857 jumpToLoc(Loc: ActiveMacros.back()->ExitLoc, InBuffer: ActiveMacros.back()->ExitBuffer);
2858 Lex();
2859 // If .endm/.endr is followed by \n instead of a comment, consume it so that
2860 // we don't print an excess \n.
2861 if (getTok().is(K: AsmToken::EndOfStatement))
2862 Lex();
2863
2864 // Pop the instantiation entry.
2865 delete ActiveMacros.back();
2866 ActiveMacros.pop_back();
2867}
2868
2869bool AsmParser::parseAssignment(StringRef Name, AssignmentKind Kind) {
2870 MCSymbol *Sym;
2871 const MCExpr *Value;
2872 SMLoc ExprLoc = getTok().getLoc();
2873 bool AllowRedef =
2874 Kind == AssignmentKind::Set || Kind == AssignmentKind::Equal;
2875 if (MCParserUtils::parseAssignmentExpression(Name, allow_redef: AllowRedef, Parser&: *this, Symbol&: Sym,
2876 Value))
2877 return true;
2878
2879 if (!Sym) {
2880 // In the case where we parse an expression starting with a '.', we will
2881 // not generate an error, nor will we create a symbol. In this case we
2882 // should just return out.
2883 return false;
2884 }
2885
2886 if (discardLTOSymbol(Name))
2887 return false;
2888
2889 // Do the assignment.
2890 switch (Kind) {
2891 case AssignmentKind::Equal:
2892 Out.emitAssignment(Symbol: Sym, Value);
2893 break;
2894 case AssignmentKind::Set:
2895 case AssignmentKind::Equiv:
2896 Out.emitAssignment(Symbol: Sym, Value);
2897 Out.emitSymbolAttribute(Symbol: Sym, Attribute: MCSA_NoDeadStrip);
2898 break;
2899 case AssignmentKind::LTOSetConditional:
2900 if (Value->getKind() != MCExpr::SymbolRef)
2901 return Error(L: ExprLoc, Msg: "expected identifier");
2902
2903 Out.emitConditionalAssignment(Symbol: Sym, Value);
2904 break;
2905 }
2906
2907 return false;
2908}
2909
2910/// parseIdentifier:
2911/// ::= identifier
2912/// ::= string
2913bool AsmParser::parseIdentifier(StringRef &Res) {
2914 // The assembler has relaxed rules for accepting identifiers, in particular we
2915 // allow things like '.globl $foo' and '.def @feat.00', which would normally be
2916 // separate tokens. At this level, we have already lexed so we cannot (currently)
2917 // handle this as a context dependent token, instead we detect adjacent tokens
2918 // and return the combined identifier.
2919 if (Lexer.is(K: AsmToken::Dollar) || Lexer.is(K: AsmToken::At)) {
2920 SMLoc PrefixLoc = getLexer().getLoc();
2921
2922 // Consume the prefix character, and check for a following identifier.
2923
2924 AsmToken Buf[1];
2925 Lexer.peekTokens(Buf, ShouldSkipSpace: false);
2926
2927 if (Buf[0].isNot(K: AsmToken::Identifier) && Buf[0].isNot(K: AsmToken::Integer))
2928 return true;
2929
2930 // We have a '$' or '@' followed by an identifier or integer token, make
2931 // sure they are adjacent.
2932 if (PrefixLoc.getPointer() + 1 != Buf[0].getLoc().getPointer())
2933 return true;
2934
2935 // eat $ or @
2936 Lexer.Lex(); // Lexer's Lex guarantees consecutive token.
2937 // Construct the joined identifier and consume the token.
2938 Res = StringRef(PrefixLoc.getPointer(), getTok().getString().size() + 1);
2939 Lex(); // Parser Lex to maintain invariants.
2940 return false;
2941 }
2942
2943 if (Lexer.isNot(K: AsmToken::Identifier) && Lexer.isNot(K: AsmToken::String))
2944 return true;
2945
2946 Res = getTok().getIdentifier();
2947
2948 Lex(); // Consume the identifier token.
2949
2950 return false;
2951}
2952
2953/// parseDirectiveSet:
2954/// ::= .equ identifier ',' expression
2955/// ::= .equiv identifier ',' expression
2956/// ::= .set identifier ',' expression
2957/// ::= .lto_set_conditional identifier ',' expression
2958bool AsmParser::parseDirectiveSet(StringRef IDVal, AssignmentKind Kind) {
2959 StringRef Name;
2960 if (check(P: parseIdentifier(Res&: Name), Msg: "expected identifier") || parseComma() ||
2961 parseAssignment(Name, Kind))
2962 return true;
2963 return false;
2964}
2965
2966bool AsmParser::parseEscapedString(std::string &Data) {
2967 if (check(P: getTok().isNot(K: AsmToken::String), Msg: "expected string"))
2968 return true;
2969
2970 Data = "";
2971 StringRef Str = getTok().getStringContents();
2972 for (unsigned i = 0, e = Str.size(); i != e; ++i) {
2973 if (Str[i] != '\\') {
2974 if ((Str[i] == '\n') || (Str[i] == '\r')) {
2975 // Don't double-warn for Windows newlines.
2976 if ((Str[i] == '\n') && (i > 0) && (Str[i - 1] == '\r'))
2977 continue;
2978
2979 SMLoc NewlineLoc = SMLoc::getFromPointer(Ptr: Str.data() + i);
2980 if (Warning(L: NewlineLoc, Msg: "unterminated string; newline inserted"))
2981 return true;
2982 }
2983 Data += Str[i];
2984 continue;
2985 }
2986
2987 // Recognize escaped characters. Note that this escape semantics currently
2988 // loosely follows Darwin 'as'.
2989 ++i;
2990 if (i == e)
2991 return TokError(Msg: "unexpected backslash at end of string");
2992
2993 // Recognize hex sequences similarly to GNU 'as'.
2994 if (Str[i] == 'x' || Str[i] == 'X') {
2995 size_t length = Str.size();
2996 if (i + 1 >= length || !isHexDigit(C: Str[i + 1]))
2997 return TokError(Msg: "invalid hexadecimal escape sequence");
2998
2999 // Consume hex characters. GNU 'as' reads all hexadecimal characters and
3000 // then truncates to the lower 16 bits. Seems reasonable.
3001 unsigned Value = 0;
3002 while (i + 1 < length && isHexDigit(C: Str[i + 1]))
3003 Value = Value * 16 + hexDigitValue(C: Str[++i]);
3004
3005 Data += (unsigned char)(Value & 0xFF);
3006 continue;
3007 }
3008
3009 // Recognize octal sequences.
3010 if ((unsigned)(Str[i] - '0') <= 7) {
3011 // Consume up to three octal characters.
3012 unsigned Value = Str[i] - '0';
3013
3014 if (i + 1 != e && ((unsigned)(Str[i + 1] - '0')) <= 7) {
3015 ++i;
3016 Value = Value * 8 + (Str[i] - '0');
3017
3018 if (i + 1 != e && ((unsigned)(Str[i + 1] - '0')) <= 7) {
3019 ++i;
3020 Value = Value * 8 + (Str[i] - '0');
3021 }
3022 }
3023
3024 if (Value > 255)
3025 return TokError(Msg: "invalid octal escape sequence (out of range)");
3026
3027 Data += (unsigned char)Value;
3028 continue;
3029 }
3030
3031 // Otherwise recognize individual escapes.
3032 switch (Str[i]) {
3033 default:
3034 // Just reject invalid escape sequences for now.
3035 return TokError(Msg: "invalid escape sequence (unrecognized character)");
3036
3037 case 'b': Data += '\b'; break;
3038 case 'f': Data += '\f'; break;
3039 case 'n': Data += '\n'; break;
3040 case 'r': Data += '\r'; break;
3041 case 't': Data += '\t'; break;
3042 case '"': Data += '"'; break;
3043 case '\\': Data += '\\'; break;
3044 }
3045 }
3046
3047 Lex();
3048 return false;
3049}
3050
3051bool AsmParser::parseAngleBracketString(std::string &Data) {
3052 SMLoc EndLoc, StartLoc = getTok().getLoc();
3053 if (isAngleBracketString(StrLoc&: StartLoc, EndLoc)) {
3054 const char *StartChar = StartLoc.getPointer() + 1;
3055 const char *EndChar = EndLoc.getPointer() - 1;
3056 jumpToLoc(Loc: EndLoc, InBuffer: CurBuffer);
3057 /// Eat from '<' to '>'
3058 Lex();
3059
3060 Data = angleBracketString(AltMacroStr: StringRef(StartChar, EndChar - StartChar));
3061 return false;
3062 }
3063 return true;
3064}
3065
3066/// parseDirectiveAscii:
3067// ::= .ascii [ "string"+ ( , "string"+ )* ]
3068/// ::= ( .asciz | .string ) [ "string" ( , "string" )* ]
3069bool AsmParser::parseDirectiveAscii(StringRef IDVal, bool ZeroTerminated) {
3070 auto parseOp = [&]() -> bool {
3071 std::string Data;
3072 if (checkForValidSection())
3073 return true;
3074 // Only support spaces as separators for .ascii directive for now. See the
3075 // discusssion at https://reviews.llvm.org/D91460 for more details.
3076 do {
3077 if (parseEscapedString(Data))
3078 return true;
3079 getStreamer().emitBytes(Data);
3080 } while (!ZeroTerminated && getTok().is(K: AsmToken::String));
3081 if (ZeroTerminated)
3082 getStreamer().emitBytes(Data: StringRef("\0", 1));
3083 return false;
3084 };
3085
3086 return parseMany(parseOne: parseOp);
3087}
3088
3089/// parseDirectiveReloc
3090/// ::= .reloc expression , identifier [ , expression ]
3091bool AsmParser::parseDirectiveReloc(SMLoc DirectiveLoc) {
3092 const MCExpr *Offset;
3093 const MCExpr *Expr = nullptr;
3094 SMLoc OffsetLoc = Lexer.getTok().getLoc();
3095
3096 if (parseExpression(Res&: Offset))
3097 return true;
3098 if (parseComma() ||
3099 check(P: getTok().isNot(K: AsmToken::Identifier), Msg: "expected relocation name"))
3100 return true;
3101
3102 SMLoc NameLoc = Lexer.getTok().getLoc();
3103 StringRef Name = Lexer.getTok().getIdentifier();
3104 Lex();
3105
3106 if (Lexer.is(K: AsmToken::Comma)) {
3107 Lex();
3108 SMLoc ExprLoc = Lexer.getLoc();
3109 if (parseExpression(Res&: Expr))
3110 return true;
3111
3112 MCValue Value;
3113 if (!Expr->evaluateAsRelocatable(Res&: Value, Asm: nullptr))
3114 return Error(L: ExprLoc, Msg: "expression must be relocatable");
3115 }
3116
3117 if (parseEOL())
3118 return true;
3119
3120 const MCTargetAsmParser &MCT = getTargetParser();
3121 const MCSubtargetInfo &STI = MCT.getSTI();
3122 if (std::optional<std::pair<bool, std::string>> Err =
3123 getStreamer().emitRelocDirective(Offset: *Offset, Name, Expr, Loc: DirectiveLoc,
3124 STI))
3125 return Error(L: Err->first ? NameLoc : OffsetLoc, Msg: Err->second);
3126
3127 return false;
3128}
3129
3130/// parseDirectiveValue
3131/// ::= (.byte | .short | ... ) [ expression (, expression)* ]
3132bool AsmParser::parseDirectiveValue(StringRef IDVal, unsigned Size) {
3133 auto parseOp = [&]() -> bool {
3134 const MCExpr *Value;
3135 SMLoc ExprLoc = getLexer().getLoc();
3136 if (checkForValidSection() || getTargetParser().parseDataExpr(Res&: Value))
3137 return true;
3138 // Special case constant expressions to match code generator.
3139 if (const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Val: Value)) {
3140 assert(Size <= 8 && "Invalid size");
3141 uint64_t IntValue = MCE->getValue();
3142 if (!isUIntN(N: 8 * Size, x: IntValue) && !isIntN(N: 8 * Size, x: IntValue))
3143 return Error(L: ExprLoc, Msg: "out of range literal value");
3144 getStreamer().emitIntValue(Value: IntValue, Size);
3145 } else
3146 getStreamer().emitValue(Value, Size, Loc: ExprLoc);
3147 return false;
3148 };
3149
3150 return parseMany(parseOne: parseOp);
3151}
3152
3153static bool parseHexOcta(AsmParser &Asm, uint64_t &hi, uint64_t &lo) {
3154 if (Asm.getTok().isNot(K: AsmToken::Integer) &&
3155 Asm.getTok().isNot(K: AsmToken::BigNum))
3156 return Asm.TokError(Msg: "unknown token in expression");
3157 SMLoc ExprLoc = Asm.getTok().getLoc();
3158 APInt IntValue = Asm.getTok().getAPIntVal();
3159 Asm.Lex();
3160 if (!IntValue.isIntN(N: 128))
3161 return Asm.Error(L: ExprLoc, Msg: "out of range literal value");
3162 if (!IntValue.isIntN(N: 64)) {
3163 hi = IntValue.getHiBits(numBits: IntValue.getBitWidth() - 64).getZExtValue();
3164 lo = IntValue.getLoBits(numBits: 64).getZExtValue();
3165 } else {
3166 hi = 0;
3167 lo = IntValue.getZExtValue();
3168 }
3169 return false;
3170}
3171
3172/// ParseDirectiveOctaValue
3173/// ::= .octa [ hexconstant (, hexconstant)* ]
3174
3175bool AsmParser::parseDirectiveOctaValue(StringRef IDVal) {
3176 auto parseOp = [&]() -> bool {
3177 if (checkForValidSection())
3178 return true;
3179 uint64_t hi, lo;
3180 if (parseHexOcta(Asm&: *this, hi, lo))
3181 return true;
3182 if (MAI.isLittleEndian()) {
3183 getStreamer().emitInt64(Value: lo);
3184 getStreamer().emitInt64(Value: hi);
3185 } else {
3186 getStreamer().emitInt64(Value: hi);
3187 getStreamer().emitInt64(Value: lo);
3188 }
3189 return false;
3190 };
3191
3192 return parseMany(parseOne: parseOp);
3193}
3194
3195bool AsmParser::parseRealValue(const fltSemantics &Semantics, APInt &Res) {
3196 // We don't truly support arithmetic on floating point expressions, so we
3197 // have to manually parse unary prefixes.
3198 bool IsNeg = false;
3199 if (getLexer().is(K: AsmToken::Minus)) {
3200 Lexer.Lex();
3201 IsNeg = true;
3202 } else if (getLexer().is(K: AsmToken::Plus))
3203 Lexer.Lex();
3204
3205 if (Lexer.is(K: AsmToken::Error))
3206 return TokError(Msg: Lexer.getErr());
3207 if (Lexer.isNot(K: AsmToken::Integer) && Lexer.isNot(K: AsmToken::Real) &&
3208 Lexer.isNot(K: AsmToken::Identifier))
3209 return TokError(Msg: "unexpected token in directive");
3210
3211 // Convert to an APFloat.
3212 APFloat Value(Semantics);
3213 StringRef IDVal = getTok().getString();
3214 if (getLexer().is(K: AsmToken::Identifier)) {
3215 if (!IDVal.compare_insensitive(RHS: "infinity") ||
3216 !IDVal.compare_insensitive(RHS: "inf"))
3217 Value = APFloat::getInf(Sem: Semantics);
3218 else if (!IDVal.compare_insensitive(RHS: "nan"))
3219 Value = APFloat::getNaN(Sem: Semantics, Negative: false, payload: ~0);
3220 else
3221 return TokError(Msg: "invalid floating point literal");
3222 } else if (errorToBool(
3223 Err: Value.convertFromString(IDVal, APFloat::rmNearestTiesToEven)
3224 .takeError()))
3225 return TokError(Msg: "invalid floating point literal");
3226 if (IsNeg)
3227 Value.changeSign();
3228
3229 // Consume the numeric token.
3230 Lex();
3231
3232 Res = Value.bitcastToAPInt();
3233
3234 return false;
3235}
3236
3237/// parseDirectiveRealValue
3238/// ::= (.single | .double) [ expression (, expression)* ]
3239bool AsmParser::parseDirectiveRealValue(StringRef IDVal,
3240 const fltSemantics &Semantics) {
3241 auto parseOp = [&]() -> bool {
3242 APInt AsInt;
3243 if (checkForValidSection() || parseRealValue(Semantics, Res&: AsInt))
3244 return true;
3245 getStreamer().emitIntValue(Value: AsInt.getLimitedValue(),
3246 Size: AsInt.getBitWidth() / 8);
3247 return false;
3248 };
3249
3250 return parseMany(parseOne: parseOp);
3251}
3252
3253/// parseDirectiveZero
3254/// ::= .zero expression
3255bool AsmParser::parseDirectiveZero() {
3256 SMLoc NumBytesLoc = Lexer.getLoc();
3257 const MCExpr *NumBytes;
3258 if (checkForValidSection() || parseExpression(Res&: NumBytes))
3259 return true;
3260
3261 int64_t Val = 0;
3262 if (getLexer().is(K: AsmToken::Comma)) {
3263 Lex();
3264 if (parseAbsoluteExpression(Res&: Val))
3265 return true;
3266 }
3267
3268 if (parseEOL())
3269 return true;
3270 getStreamer().emitFill(NumBytes: *NumBytes, FillValue: Val, Loc: NumBytesLoc);
3271
3272 return false;
3273}
3274
3275/// parseDirectiveFill
3276/// ::= .fill expression [ , expression [ , expression ] ]
3277bool AsmParser::parseDirectiveFill() {
3278 SMLoc NumValuesLoc = Lexer.getLoc();
3279 const MCExpr *NumValues;
3280 if (checkForValidSection() || parseExpression(Res&: NumValues))
3281 return true;
3282
3283 int64_t FillSize = 1;
3284 int64_t FillExpr = 0;
3285
3286 SMLoc SizeLoc, ExprLoc;
3287
3288 if (parseOptionalToken(T: AsmToken::Comma)) {
3289 SizeLoc = getTok().getLoc();
3290 if (parseAbsoluteExpression(Res&: FillSize))
3291 return true;
3292 if (parseOptionalToken(T: AsmToken::Comma)) {
3293 ExprLoc = getTok().getLoc();
3294 if (parseAbsoluteExpression(Res&: FillExpr))
3295 return true;
3296 }
3297 }
3298 if (parseEOL())
3299 return true;
3300
3301 if (FillSize < 0) {
3302 Warning(L: SizeLoc, Msg: "'.fill' directive with negative size has no effect");
3303 return false;
3304 }
3305 if (FillSize > 8) {
3306 Warning(L: SizeLoc, Msg: "'.fill' directive with size greater than 8 has been truncated to 8");
3307 FillSize = 8;
3308 }
3309
3310 if (!isUInt<32>(x: FillExpr) && FillSize > 4)
3311 Warning(L: ExprLoc, Msg: "'.fill' directive pattern has been truncated to 32-bits");
3312
3313 getStreamer().emitFill(NumValues: *NumValues, Size: FillSize, Expr: FillExpr, Loc: NumValuesLoc);
3314
3315 return false;
3316}
3317
3318/// parseDirectiveOrg
3319/// ::= .org expression [ , expression ]
3320bool AsmParser::parseDirectiveOrg() {
3321 const MCExpr *Offset;
3322 SMLoc OffsetLoc = Lexer.getLoc();
3323 if (checkForValidSection() || parseExpression(Res&: Offset))
3324 return true;
3325
3326 // Parse optional fill expression.
3327 int64_t FillExpr = 0;
3328 if (parseOptionalToken(T: AsmToken::Comma))
3329 if (parseAbsoluteExpression(Res&: FillExpr))
3330 return true;
3331 if (parseEOL())
3332 return true;
3333
3334 getStreamer().emitValueToOffset(Offset, Value: FillExpr, Loc: OffsetLoc);
3335 return false;
3336}
3337
3338/// parseDirectiveAlign
3339/// ::= {.align, ...} expression [ , expression [ , expression ]]
3340bool AsmParser::parseDirectiveAlign(bool IsPow2, unsigned ValueSize) {
3341 SMLoc AlignmentLoc = getLexer().getLoc();
3342 int64_t Alignment;
3343 SMLoc MaxBytesLoc;
3344 bool HasFillExpr = false;
3345 int64_t FillExpr = 0;
3346 int64_t MaxBytesToFill = 0;
3347 SMLoc FillExprLoc;
3348
3349 auto parseAlign = [&]() -> bool {
3350 if (parseAbsoluteExpression(Res&: Alignment))
3351 return true;
3352 if (parseOptionalToken(T: AsmToken::Comma)) {
3353 // The fill expression can be omitted while specifying a maximum number of
3354 // alignment bytes, e.g:
3355 // .align 3,,4
3356 if (getTok().isNot(K: AsmToken::Comma)) {
3357 HasFillExpr = true;
3358 if (parseTokenLoc(Loc&: FillExprLoc) || parseAbsoluteExpression(Res&: FillExpr))
3359 return true;
3360 }
3361 if (parseOptionalToken(T: AsmToken::Comma))
3362 if (parseTokenLoc(Loc&: MaxBytesLoc) ||
3363 parseAbsoluteExpression(Res&: MaxBytesToFill))
3364 return true;
3365 }
3366 return parseEOL();
3367 };
3368
3369 if (checkForValidSection())
3370 return true;
3371 // Ignore empty '.p2align' directives for GNU-as compatibility
3372 if (IsPow2 && (ValueSize == 1) && getTok().is(K: AsmToken::EndOfStatement)) {
3373 Warning(L: AlignmentLoc, Msg: "p2align directive with no operand(s) is ignored");
3374 return parseEOL();
3375 }
3376 if (parseAlign())
3377 return true;
3378
3379 // Always emit an alignment here even if we thrown an error.
3380 bool ReturnVal = false;
3381
3382 // Compute alignment in bytes.
3383 if (IsPow2) {
3384 // FIXME: Diagnose overflow.
3385 if (Alignment >= 32) {
3386 ReturnVal |= Error(L: AlignmentLoc, Msg: "invalid alignment value");
3387 Alignment = 31;
3388 }
3389
3390 Alignment = 1ULL << Alignment;
3391 } else {
3392 // Reject alignments that aren't either a power of two or zero,
3393 // for gas compatibility. Alignment of zero is silently rounded
3394 // up to one.
3395 if (Alignment == 0)
3396 Alignment = 1;
3397 else if (!isPowerOf2_64(Value: Alignment)) {
3398 ReturnVal |= Error(L: AlignmentLoc, Msg: "alignment must be a power of 2");
3399 Alignment = llvm::bit_floor<uint64_t>(Value: Alignment);
3400 }
3401 if (!isUInt<32>(x: Alignment)) {
3402 ReturnVal |= Error(L: AlignmentLoc, Msg: "alignment must be smaller than 2**32");
3403 Alignment = 1u << 31;
3404 }
3405 }
3406
3407 // Diagnose non-sensical max bytes to align.
3408 if (MaxBytesLoc.isValid()) {
3409 if (MaxBytesToFill < 1) {
3410 ReturnVal |= Error(L: MaxBytesLoc,
3411 Msg: "alignment directive can never be satisfied in this "
3412 "many bytes, ignoring maximum bytes expression");
3413 MaxBytesToFill = 0;
3414 }
3415
3416 if (MaxBytesToFill >= Alignment) {
3417 Warning(L: MaxBytesLoc, Msg: "maximum bytes expression exceeds alignment and "
3418 "has no effect");
3419 MaxBytesToFill = 0;
3420 }
3421 }
3422
3423 const MCSection *Section = getStreamer().getCurrentSectionOnly();
3424 assert(Section && "must have section to emit alignment");
3425
3426 if (HasFillExpr && FillExpr != 0 && Section->isVirtualSection()) {
3427 ReturnVal |=
3428 Warning(L: FillExprLoc, Msg: "ignoring non-zero fill value in " +
3429 Section->getVirtualSectionKind() +
3430 " section '" + Section->getName() + "'");
3431 FillExpr = 0;
3432 }
3433
3434 // Check whether we should use optimal code alignment for this .align
3435 // directive.
3436 if (Section->useCodeAlign() && !HasFillExpr) {
3437 getStreamer().emitCodeAlignment(
3438 Alignment: Align(Alignment), STI: &getTargetParser().getSTI(), MaxBytesToEmit: MaxBytesToFill);
3439 } else {
3440 // FIXME: Target specific behavior about how the "extra" bytes are filled.
3441 getStreamer().emitValueToAlignment(Alignment: Align(Alignment), Value: FillExpr, ValueSize,
3442 MaxBytesToEmit: MaxBytesToFill);
3443 }
3444
3445 return ReturnVal;
3446}
3447
3448/// parseDirectiveFile
3449/// ::= .file filename
3450/// ::= .file number [directory] filename [md5 checksum] [source source-text]
3451bool AsmParser::parseDirectiveFile(SMLoc DirectiveLoc) {
3452 // FIXME: I'm not sure what this is.
3453 int64_t FileNumber = -1;
3454 if (getLexer().is(K: AsmToken::Integer)) {
3455 FileNumber = getTok().getIntVal();
3456 Lex();
3457
3458 if (FileNumber < 0)
3459 return TokError(Msg: "negative file number");
3460 }
3461
3462 std::string Path;
3463
3464 // Usually the directory and filename together, otherwise just the directory.
3465 // Allow the strings to have escaped octal character sequence.
3466 if (parseEscapedString(Data&: Path))
3467 return true;
3468
3469 StringRef Directory;
3470 StringRef Filename;
3471 std::string FilenameData;
3472 if (getLexer().is(K: AsmToken::String)) {
3473 if (check(P: FileNumber == -1,
3474 Msg: "explicit path specified, but no file number") ||
3475 parseEscapedString(Data&: FilenameData))
3476 return true;
3477 Filename = FilenameData;
3478 Directory = Path;
3479 } else {
3480 Filename = Path;
3481 }
3482
3483 uint64_t MD5Hi, MD5Lo;
3484 bool HasMD5 = false;
3485
3486 std::optional<StringRef> Source;
3487 bool HasSource = false;
3488 std::string SourceString;
3489
3490 while (!parseOptionalToken(T: AsmToken::EndOfStatement)) {
3491 StringRef Keyword;
3492 if (check(P: getTok().isNot(K: AsmToken::Identifier),
3493 Msg: "unexpected token in '.file' directive") ||
3494 parseIdentifier(Res&: Keyword))
3495 return true;
3496 if (Keyword == "md5") {
3497 HasMD5 = true;
3498 if (check(P: FileNumber == -1,
3499 Msg: "MD5 checksum specified, but no file number") ||
3500 parseHexOcta(Asm&: *this, hi&: MD5Hi, lo&: MD5Lo))
3501 return true;
3502 } else if (Keyword == "source") {
3503 HasSource = true;
3504 if (check(P: FileNumber == -1,
3505 Msg: "source specified, but no file number") ||
3506 check(P: getTok().isNot(K: AsmToken::String),
3507 Msg: "unexpected token in '.file' directive") ||
3508 parseEscapedString(Data&: SourceString))
3509 return true;
3510 } else {
3511 return TokError(Msg: "unexpected token in '.file' directive");
3512 }
3513 }
3514
3515 if (FileNumber == -1) {
3516 // Ignore the directive if there is no number and the target doesn't support
3517 // numberless .file directives. This allows some portability of assembler
3518 // between different object file formats.
3519 if (getContext().getAsmInfo()->hasSingleParameterDotFile())
3520 getStreamer().emitFileDirective(Filename);
3521 } else {
3522 // In case there is a -g option as well as debug info from directive .file,
3523 // we turn off the -g option, directly use the existing debug info instead.
3524 // Throw away any implicit file table for the assembler source.
3525 if (Ctx.getGenDwarfForAssembly()) {
3526 Ctx.getMCDwarfLineTable(CUID: 0).resetFileTable();
3527 Ctx.setGenDwarfForAssembly(false);
3528 }
3529
3530 std::optional<MD5::MD5Result> CKMem;
3531 if (HasMD5) {
3532 MD5::MD5Result Sum;
3533 for (unsigned i = 0; i != 8; ++i) {
3534 Sum[i] = uint8_t(MD5Hi >> ((7 - i) * 8));
3535 Sum[i + 8] = uint8_t(MD5Lo >> ((7 - i) * 8));
3536 }
3537 CKMem = Sum;
3538 }
3539 if (HasSource) {
3540 char *SourceBuf = static_cast<char *>(Ctx.allocate(Size: SourceString.size()));
3541 memcpy(dest: SourceBuf, src: SourceString.data(), n: SourceString.size());
3542 Source = StringRef(SourceBuf, SourceString.size());
3543 }
3544 if (FileNumber == 0) {
3545 // Upgrade to Version 5 for assembly actions like clang -c a.s.
3546 if (Ctx.getDwarfVersion() < 5)
3547 Ctx.setDwarfVersion(5);
3548 getStreamer().emitDwarfFile0Directive(Directory, Filename, Checksum: CKMem, Source);
3549 } else {
3550 Expected<unsigned> FileNumOrErr = getStreamer().tryEmitDwarfFileDirective(
3551 FileNo: FileNumber, Directory, Filename, Checksum: CKMem, Source);
3552 if (!FileNumOrErr)
3553 return Error(L: DirectiveLoc, Msg: toString(E: FileNumOrErr.takeError()));
3554 }
3555 // Alert the user if there are some .file directives with MD5 and some not.
3556 // But only do that once.
3557 if (!ReportedInconsistentMD5 && !Ctx.isDwarfMD5UsageConsistent(CUID: 0)) {
3558 ReportedInconsistentMD5 = true;
3559 return Warning(L: DirectiveLoc, Msg: "inconsistent use of MD5 checksums");
3560 }
3561 }
3562
3563 return false;
3564}
3565
3566/// parseDirectiveLine
3567/// ::= .line [number]
3568bool AsmParser::parseDirectiveLine() {
3569 parseOptionalToken(T: AsmToken::Integer);
3570 return parseEOL();
3571}
3572
3573/// parseDirectiveLoc
3574/// ::= .loc FileNumber [LineNumber] [ColumnPos] [basic_block] [prologue_end]
3575/// [epilogue_begin] [is_stmt VALUE] [isa VALUE]
3576/// The first number is a file number, must have been previously assigned with
3577/// a .file directive, the second number is the line number and optionally the
3578/// third number is a column position (zero if not specified). The remaining
3579/// optional items are .loc sub-directives.
3580bool AsmParser::parseDirectiveLoc() {
3581 int64_t FileNumber = 0, LineNumber = 0;
3582 SMLoc Loc = getTok().getLoc();
3583 if (parseIntToken(V&: FileNumber) ||
3584 check(P: FileNumber < 1 && Ctx.getDwarfVersion() < 5, Loc,
3585 Msg: "file number less than one in '.loc' directive") ||
3586 check(P: !getContext().isValidDwarfFileNumber(FileNumber), Loc,
3587 Msg: "unassigned file number in '.loc' directive"))
3588 return true;
3589
3590 // optional
3591 if (getLexer().is(K: AsmToken::Integer)) {
3592 LineNumber = getTok().getIntVal();
3593 if (LineNumber < 0)
3594 return TokError(Msg: "line number less than zero in '.loc' directive");
3595 Lex();
3596 }
3597
3598 int64_t ColumnPos = 0;
3599 if (getLexer().is(K: AsmToken::Integer)) {
3600 ColumnPos = getTok().getIntVal();
3601 if (ColumnPos < 0)
3602 return TokError(Msg: "column position less than zero in '.loc' directive");
3603 Lex();
3604 }
3605
3606 auto PrevFlags = getContext().getCurrentDwarfLoc().getFlags();
3607 unsigned Flags = PrevFlags & DWARF2_FLAG_IS_STMT;
3608 unsigned Isa = 0;
3609 int64_t Discriminator = 0;
3610
3611 auto parseLocOp = [&]() -> bool {
3612 StringRef Name;
3613 SMLoc Loc = getTok().getLoc();
3614 if (parseIdentifier(Res&: Name))
3615 return TokError(Msg: "unexpected token in '.loc' directive");
3616
3617 if (Name == "basic_block")
3618 Flags |= DWARF2_FLAG_BASIC_BLOCK;
3619 else if (Name == "prologue_end")
3620 Flags |= DWARF2_FLAG_PROLOGUE_END;
3621 else if (Name == "epilogue_begin")
3622 Flags |= DWARF2_FLAG_EPILOGUE_BEGIN;
3623 else if (Name == "is_stmt") {
3624 Loc = getTok().getLoc();
3625 const MCExpr *Value;
3626 if (parseExpression(Res&: Value))
3627 return true;
3628 // The expression must be the constant 0 or 1.
3629 if (const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Val: Value)) {
3630 int Value = MCE->getValue();
3631 if (Value == 0)
3632 Flags &= ~DWARF2_FLAG_IS_STMT;
3633 else if (Value == 1)
3634 Flags |= DWARF2_FLAG_IS_STMT;
3635 else
3636 return Error(L: Loc, Msg: "is_stmt value not 0 or 1");
3637 } else {
3638 return Error(L: Loc, Msg: "is_stmt value not the constant value of 0 or 1");
3639 }
3640 } else if (Name == "isa") {
3641 Loc = getTok().getLoc();
3642 const MCExpr *Value;
3643 if (parseExpression(Res&: Value))
3644 return true;
3645 // The expression must be a constant greater or equal to 0.
3646 if (const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Val: Value)) {
3647 int Value = MCE->getValue();
3648 if (Value < 0)
3649 return Error(L: Loc, Msg: "isa number less than zero");
3650 Isa = Value;
3651 } else {
3652 return Error(L: Loc, Msg: "isa number not a constant value");
3653 }
3654 } else if (Name == "discriminator") {
3655 if (parseAbsoluteExpression(Res&: Discriminator))
3656 return true;
3657 } else {
3658 return Error(L: Loc, Msg: "unknown sub-directive in '.loc' directive");
3659 }
3660 return false;
3661 };
3662
3663 if (parseMany(parseOne: parseLocOp, hasComma: false /*hasComma*/))
3664 return true;
3665
3666 getStreamer().emitDwarfLocDirective(FileNo: FileNumber, Line: LineNumber, Column: ColumnPos, Flags,
3667 Isa, Discriminator, FileName: StringRef());
3668
3669 return false;
3670}
3671
3672/// parseDirectiveLoc
3673/// ::= .loc_label label
3674bool AsmParser::parseDirectiveLocLabel(SMLoc DirectiveLoc) {
3675 StringRef Name;
3676 DirectiveLoc = Lexer.getLoc();
3677 if (parseIdentifier(Res&: Name))
3678 return TokError(Msg: "expected identifier");
3679 if (parseEOL())
3680 return true;
3681 getStreamer().emitDwarfLocLabelDirective(Loc: DirectiveLoc, Name);
3682 return false;
3683}
3684
3685/// parseDirectiveStabs
3686/// ::= .stabs string, number, number, number
3687bool AsmParser::parseDirectiveStabs() {
3688 return TokError(Msg: "unsupported directive '.stabs'");
3689}
3690
3691/// parseDirectiveCVFile
3692/// ::= .cv_file number filename [checksum] [checksumkind]
3693bool AsmParser::parseDirectiveCVFile() {
3694 SMLoc FileNumberLoc = getTok().getLoc();
3695 int64_t FileNumber;
3696 std::string Filename;
3697 std::string Checksum;
3698 int64_t ChecksumKind = 0;
3699
3700 if (parseIntToken(V&: FileNumber, ErrMsg: "expected file number") ||
3701 check(P: FileNumber < 1, Loc: FileNumberLoc, Msg: "file number less than one") ||
3702 check(P: getTok().isNot(K: AsmToken::String),
3703 Msg: "unexpected token in '.cv_file' directive") ||
3704 parseEscapedString(Data&: Filename))
3705 return true;
3706 if (!parseOptionalToken(T: AsmToken::EndOfStatement)) {
3707 if (check(P: getTok().isNot(K: AsmToken::String),
3708 Msg: "unexpected token in '.cv_file' directive") ||
3709 parseEscapedString(Data&: Checksum) ||
3710 parseIntToken(V&: ChecksumKind,
3711 ErrMsg: "expected checksum kind in '.cv_file' directive") ||
3712 parseEOL())
3713 return true;
3714 }
3715
3716 Checksum = fromHex(Input: Checksum);
3717 void *CKMem = Ctx.allocate(Size: Checksum.size(), Align: 1);
3718 memcpy(dest: CKMem, src: Checksum.data(), n: Checksum.size());
3719 ArrayRef<uint8_t> ChecksumAsBytes(reinterpret_cast<const uint8_t *>(CKMem),
3720 Checksum.size());
3721
3722 if (!getStreamer().emitCVFileDirective(FileNo: FileNumber, Filename, Checksum: ChecksumAsBytes,
3723 ChecksumKind: static_cast<uint8_t>(ChecksumKind)))
3724 return Error(L: FileNumberLoc, Msg: "file number already allocated");
3725
3726 return false;
3727}
3728
3729bool AsmParser::parseCVFunctionId(int64_t &FunctionId,
3730 StringRef DirectiveName) {
3731 SMLoc Loc;
3732 return parseTokenLoc(Loc) ||
3733 parseIntToken(V&: FunctionId, ErrMsg: "expected function id") ||
3734 check(P: FunctionId < 0 || FunctionId >= UINT_MAX, Loc,
3735 Msg: "expected function id within range [0, UINT_MAX)");
3736}
3737
3738bool AsmParser::parseCVFileId(int64_t &FileNumber, StringRef DirectiveName) {
3739 SMLoc Loc;
3740 return parseTokenLoc(Loc) ||
3741 parseIntToken(V&: FileNumber, ErrMsg: "expected file number") ||
3742 check(P: FileNumber < 1, Loc,
3743 Msg: "file number less than one in '" + DirectiveName +
3744 "' directive") ||
3745 check(P: !getCVContext().isValidFileNumber(FileNumber), Loc,
3746 Msg: "unassigned file number in '" + DirectiveName + "' directive");
3747}
3748
3749/// parseDirectiveCVFuncId
3750/// ::= .cv_func_id FunctionId
3751///
3752/// Introduces a function ID that can be used with .cv_loc.
3753bool AsmParser::parseDirectiveCVFuncId() {
3754 SMLoc FunctionIdLoc = getTok().getLoc();
3755 int64_t FunctionId;
3756
3757 if (parseCVFunctionId(FunctionId, DirectiveName: ".cv_func_id") || parseEOL())
3758 return true;
3759
3760 if (!getStreamer().emitCVFuncIdDirective(FunctionId))
3761 return Error(L: FunctionIdLoc, Msg: "function id already allocated");
3762
3763 return false;
3764}
3765
3766/// parseDirectiveCVInlineSiteId
3767/// ::= .cv_inline_site_id FunctionId
3768/// "within" IAFunc
3769/// "inlined_at" IAFile IALine [IACol]
3770///
3771/// Introduces a function ID that can be used with .cv_loc. Includes "inlined
3772/// at" source location information for use in the line table of the caller,
3773/// whether the caller is a real function or another inlined call site.
3774bool AsmParser::parseDirectiveCVInlineSiteId() {
3775 SMLoc FunctionIdLoc = getTok().getLoc();
3776 int64_t FunctionId;
3777 int64_t IAFunc;
3778 int64_t IAFile;
3779 int64_t IALine;
3780 int64_t IACol = 0;
3781
3782 // FunctionId
3783 if (parseCVFunctionId(FunctionId, DirectiveName: ".cv_inline_site_id"))
3784 return true;
3785
3786 // "within"
3787 if (check(P: (getLexer().isNot(K: AsmToken::Identifier) ||
3788 getTok().getIdentifier() != "within"),
3789 Msg: "expected 'within' identifier in '.cv_inline_site_id' directive"))
3790 return true;
3791 Lex();
3792
3793 // IAFunc
3794 if (parseCVFunctionId(FunctionId&: IAFunc, DirectiveName: ".cv_inline_site_id"))
3795 return true;
3796
3797 // "inlined_at"
3798 if (check(P: (getLexer().isNot(K: AsmToken::Identifier) ||
3799 getTok().getIdentifier() != "inlined_at"),
3800 Msg: "expected 'inlined_at' identifier in '.cv_inline_site_id' "
3801 "directive") )
3802 return true;
3803 Lex();
3804
3805 // IAFile IALine
3806 if (parseCVFileId(FileNumber&: IAFile, DirectiveName: ".cv_inline_site_id") ||
3807 parseIntToken(V&: IALine, ErrMsg: "expected line number after 'inlined_at'"))
3808 return true;
3809
3810 // [IACol]
3811 if (getLexer().is(K: AsmToken::Integer)) {
3812 IACol = getTok().getIntVal();
3813 Lex();
3814 }
3815
3816 if (parseEOL())
3817 return true;
3818
3819 if (!getStreamer().emitCVInlineSiteIdDirective(FunctionId, IAFunc, IAFile,
3820 IALine, IACol, Loc: FunctionIdLoc))
3821 return Error(L: FunctionIdLoc, Msg: "function id already allocated");
3822
3823 return false;
3824}
3825
3826/// parseDirectiveCVLoc
3827/// ::= .cv_loc FunctionId FileNumber [LineNumber] [ColumnPos] [prologue_end]
3828/// [is_stmt VALUE]
3829/// The first number is a file number, must have been previously assigned with
3830/// a .file directive, the second number is the line number and optionally the
3831/// third number is a column position (zero if not specified). The remaining
3832/// optional items are .loc sub-directives.
3833bool AsmParser::parseDirectiveCVLoc() {
3834 SMLoc DirectiveLoc = getTok().getLoc();
3835 int64_t FunctionId, FileNumber;
3836 if (parseCVFunctionId(FunctionId, DirectiveName: ".cv_loc") ||
3837 parseCVFileId(FileNumber, DirectiveName: ".cv_loc"))
3838 return true;
3839
3840 int64_t LineNumber = 0;
3841 if (getLexer().is(K: AsmToken::Integer)) {
3842 LineNumber = getTok().getIntVal();
3843 if (LineNumber < 0)
3844 return TokError(Msg: "line number less than zero in '.cv_loc' directive");
3845 Lex();
3846 }
3847
3848 int64_t ColumnPos = 0;
3849 if (getLexer().is(K: AsmToken::Integer)) {
3850 ColumnPos = getTok().getIntVal();
3851 if (ColumnPos < 0)
3852 return TokError(Msg: "column position less than zero in '.cv_loc' directive");
3853 Lex();
3854 }
3855
3856 bool PrologueEnd = false;
3857 uint64_t IsStmt = 0;
3858
3859 auto parseOp = [&]() -> bool {
3860 StringRef Name;
3861 SMLoc Loc = getTok().getLoc();
3862 if (parseIdentifier(Res&: Name))
3863 return TokError(Msg: "unexpected token in '.cv_loc' directive");
3864 if (Name == "prologue_end")
3865 PrologueEnd = true;
3866 else if (Name == "is_stmt") {
3867 Loc = getTok().getLoc();
3868 const MCExpr *Value;
3869 if (parseExpression(Res&: Value))
3870 return true;
3871 // The expression must be the constant 0 or 1.
3872 IsStmt = ~0ULL;
3873 if (const auto *MCE = dyn_cast<MCConstantExpr>(Val: Value))
3874 IsStmt = MCE->getValue();
3875
3876 if (IsStmt > 1)
3877 return Error(L: Loc, Msg: "is_stmt value not 0 or 1");
3878 } else {
3879 return Error(L: Loc, Msg: "unknown sub-directive in '.cv_loc' directive");
3880 }
3881 return false;
3882 };
3883
3884 if (parseMany(parseOne: parseOp, hasComma: false /*hasComma*/))
3885 return true;
3886
3887 getStreamer().emitCVLocDirective(FunctionId, FileNo: FileNumber, Line: LineNumber,
3888 Column: ColumnPos, PrologueEnd, IsStmt, FileName: StringRef(),
3889 Loc: DirectiveLoc);
3890 return false;
3891}
3892
3893/// parseDirectiveCVLinetable
3894/// ::= .cv_linetable FunctionId, FnStart, FnEnd
3895bool AsmParser::parseDirectiveCVLinetable() {
3896 int64_t FunctionId;
3897 StringRef FnStartName, FnEndName;
3898 SMLoc Loc = getTok().getLoc();
3899 if (parseCVFunctionId(FunctionId, DirectiveName: ".cv_linetable") || parseComma() ||
3900 parseTokenLoc(Loc) ||
3901 check(P: parseIdentifier(Res&: FnStartName), Loc,
3902 Msg: "expected identifier in directive") ||
3903 parseComma() || parseTokenLoc(Loc) ||
3904 check(P: parseIdentifier(Res&: FnEndName), Loc,
3905 Msg: "expected identifier in directive"))
3906 return true;
3907
3908 MCSymbol *FnStartSym = getContext().getOrCreateSymbol(Name: FnStartName);
3909 MCSymbol *FnEndSym = getContext().getOrCreateSymbol(Name: FnEndName);
3910
3911 getStreamer().emitCVLinetableDirective(FunctionId, FnStart: FnStartSym, FnEnd: FnEndSym);
3912 return false;
3913}
3914
3915/// parseDirectiveCVInlineLinetable
3916/// ::= .cv_inline_linetable PrimaryFunctionId FileId LineNum FnStart FnEnd
3917bool AsmParser::parseDirectiveCVInlineLinetable() {
3918 int64_t PrimaryFunctionId, SourceFileId, SourceLineNum;
3919 StringRef FnStartName, FnEndName;
3920 SMLoc Loc = getTok().getLoc();
3921 if (parseCVFunctionId(FunctionId&: PrimaryFunctionId, DirectiveName: ".cv_inline_linetable") ||
3922 parseTokenLoc(Loc) ||
3923 parseIntToken(V&: SourceFileId, ErrMsg: "expected SourceField") ||
3924 check(P: SourceFileId <= 0, Loc, Msg: "File id less than zero") ||
3925 parseTokenLoc(Loc) ||
3926 parseIntToken(V&: SourceLineNum, ErrMsg: "expected SourceLineNum") ||
3927 check(P: SourceLineNum < 0, Loc, Msg: "Line number less than zero") ||
3928 parseTokenLoc(Loc) ||
3929 check(P: parseIdentifier(Res&: FnStartName), Loc, Msg: "expected identifier") ||
3930 parseTokenLoc(Loc) ||
3931 check(P: parseIdentifier(Res&: FnEndName), Loc, Msg: "expected identifier"))
3932 return true;
3933
3934 if (parseEOL())
3935 return true;
3936
3937 MCSymbol *FnStartSym = getContext().getOrCreateSymbol(Name: FnStartName);
3938 MCSymbol *FnEndSym = getContext().getOrCreateSymbol(Name: FnEndName);
3939 getStreamer().emitCVInlineLinetableDirective(PrimaryFunctionId, SourceFileId,
3940 SourceLineNum, FnStartSym,
3941 FnEndSym);
3942 return false;
3943}
3944
3945void AsmParser::initializeCVDefRangeTypeMap() {
3946 CVDefRangeTypeMap["reg"] = CVDR_DEFRANGE_REGISTER;
3947 CVDefRangeTypeMap["frame_ptr_rel"] = CVDR_DEFRANGE_FRAMEPOINTER_REL;
3948 CVDefRangeTypeMap["subfield_reg"] = CVDR_DEFRANGE_SUBFIELD_REGISTER;
3949 CVDefRangeTypeMap["reg_rel"] = CVDR_DEFRANGE_REGISTER_REL;
3950}
3951
3952/// parseDirectiveCVDefRange
3953/// ::= .cv_def_range RangeStart RangeEnd (GapStart GapEnd)*, bytes*
3954bool AsmParser::parseDirectiveCVDefRange() {
3955 SMLoc Loc;
3956 std::vector<std::pair<const MCSymbol *, const MCSymbol *>> Ranges;
3957 while (getLexer().is(K: AsmToken::Identifier)) {
3958 Loc = getLexer().getLoc();
3959 StringRef GapStartName;
3960 if (parseIdentifier(Res&: GapStartName))
3961 return Error(L: Loc, Msg: "expected identifier in directive");
3962 MCSymbol *GapStartSym = getContext().getOrCreateSymbol(Name: GapStartName);
3963
3964 Loc = getLexer().getLoc();
3965 StringRef GapEndName;
3966 if (parseIdentifier(Res&: GapEndName))
3967 return Error(L: Loc, Msg: "expected identifier in directive");
3968 MCSymbol *GapEndSym = getContext().getOrCreateSymbol(Name: GapEndName);
3969
3970 Ranges.push_back(x: {GapStartSym, GapEndSym});
3971 }
3972
3973 StringRef CVDefRangeTypeStr;
3974 if (parseToken(
3975 T: AsmToken::Comma,
3976 Msg: "expected comma before def_range type in .cv_def_range directive") ||
3977 parseIdentifier(Res&: CVDefRangeTypeStr))
3978 return Error(L: Loc, Msg: "expected def_range type in directive");
3979
3980 StringMap<CVDefRangeType>::const_iterator CVTypeIt =
3981 CVDefRangeTypeMap.find(Key: CVDefRangeTypeStr);
3982 CVDefRangeType CVDRType = (CVTypeIt == CVDefRangeTypeMap.end())
3983 ? CVDR_DEFRANGE
3984 : CVTypeIt->getValue();
3985 switch (CVDRType) {
3986 case CVDR_DEFRANGE_REGISTER: {
3987 int64_t DRRegister;
3988 if (parseToken(T: AsmToken::Comma, Msg: "expected comma before register number in "
3989 ".cv_def_range directive") ||
3990 parseAbsoluteExpression(Res&: DRRegister))
3991 return Error(L: Loc, Msg: "expected register number");
3992
3993 codeview::DefRangeRegisterHeader DRHdr;
3994 DRHdr.Register = DRRegister;
3995 DRHdr.MayHaveNoName = 0;
3996 getStreamer().emitCVDefRangeDirective(Ranges, DRHdr);
3997 break;
3998 }
3999 case CVDR_DEFRANGE_FRAMEPOINTER_REL: {
4000 int64_t DROffset;
4001 if (parseToken(T: AsmToken::Comma,
4002 Msg: "expected comma before offset in .cv_def_range directive") ||
4003 parseAbsoluteExpression(Res&: DROffset))
4004 return Error(L: Loc, Msg: "expected offset value");
4005
4006 codeview::DefRangeFramePointerRelHeader DRHdr;
4007 DRHdr.Offset = DROffset;
4008 getStreamer().emitCVDefRangeDirective(Ranges, DRHdr);
4009 break;
4010 }
4011 case CVDR_DEFRANGE_SUBFIELD_REGISTER: {
4012 int64_t DRRegister;
4013 int64_t DROffsetInParent;
4014 if (parseToken(T: AsmToken::Comma, Msg: "expected comma before register number in "
4015 ".cv_def_range directive") ||
4016 parseAbsoluteExpression(Res&: DRRegister))
4017 return Error(L: Loc, Msg: "expected register number");
4018 if (parseToken(T: AsmToken::Comma,
4019 Msg: "expected comma before offset in .cv_def_range directive") ||
4020 parseAbsoluteExpression(Res&: DROffsetInParent))
4021 return Error(L: Loc, Msg: "expected offset value");
4022
4023 codeview::DefRangeSubfieldRegisterHeader DRHdr;
4024 DRHdr.Register = DRRegister;
4025 DRHdr.MayHaveNoName = 0;
4026 DRHdr.OffsetInParent = DROffsetInParent;
4027 getStreamer().emitCVDefRangeDirective(Ranges, DRHdr);
4028 break;
4029 }
4030 case CVDR_DEFRANGE_REGISTER_REL: {
4031 int64_t DRRegister;
4032 int64_t DRFlags;
4033 int64_t DRBasePointerOffset;
4034 if (parseToken(T: AsmToken::Comma, Msg: "expected comma before register number in "
4035 ".cv_def_range directive") ||
4036 parseAbsoluteExpression(Res&: DRRegister))
4037 return Error(L: Loc, Msg: "expected register value");
4038 if (parseToken(
4039 T: AsmToken::Comma,
4040 Msg: "expected comma before flag value in .cv_def_range directive") ||
4041 parseAbsoluteExpression(Res&: DRFlags))
4042 return Error(L: Loc, Msg: "expected flag value");
4043 if (parseToken(T: AsmToken::Comma, Msg: "expected comma before base pointer offset "
4044 "in .cv_def_range directive") ||
4045 parseAbsoluteExpression(Res&: DRBasePointerOffset))
4046 return Error(L: Loc, Msg: "expected base pointer offset value");
4047
4048 codeview::DefRangeRegisterRelHeader DRHdr;
4049 DRHdr.Register = DRRegister;
4050 DRHdr.Flags = DRFlags;
4051 DRHdr.BasePointerOffset = DRBasePointerOffset;
4052 getStreamer().emitCVDefRangeDirective(Ranges, DRHdr);
4053 break;
4054 }
4055 default:
4056 return Error(L: Loc, Msg: "unexpected def_range type in .cv_def_range directive");
4057 }
4058 return true;
4059}
4060
4061/// parseDirectiveCVString
4062/// ::= .cv_stringtable "string"
4063bool AsmParser::parseDirectiveCVString() {
4064 std::string Data;
4065 if (checkForValidSection() || parseEscapedString(Data))
4066 return true;
4067
4068 // Put the string in the table and emit the offset.
4069 std::pair<StringRef, unsigned> Insertion =
4070 getCVContext().addToStringTable(S: Data);
4071 getStreamer().emitInt32(Value: Insertion.second);
4072 return false;
4073}
4074
4075/// parseDirectiveCVStringTable
4076/// ::= .cv_stringtable
4077bool AsmParser::parseDirectiveCVStringTable() {
4078 getStreamer().emitCVStringTableDirective();
4079 return false;
4080}
4081
4082/// parseDirectiveCVFileChecksums
4083/// ::= .cv_filechecksums
4084bool AsmParser::parseDirectiveCVFileChecksums() {
4085 getStreamer().emitCVFileChecksumsDirective();
4086 return false;
4087}
4088
4089/// parseDirectiveCVFileChecksumOffset
4090/// ::= .cv_filechecksumoffset fileno
4091bool AsmParser::parseDirectiveCVFileChecksumOffset() {
4092 int64_t FileNo;
4093 if (parseIntToken(V&: FileNo))
4094 return true;
4095 if (parseEOL())
4096 return true;
4097 getStreamer().emitCVFileChecksumOffsetDirective(FileNo);
4098 return false;
4099}
4100
4101/// parseDirectiveCVFPOData
4102/// ::= .cv_fpo_data procsym
4103bool AsmParser::parseDirectiveCVFPOData() {
4104 SMLoc DirLoc = getLexer().getLoc();
4105 StringRef ProcName;
4106 if (parseIdentifier(Res&: ProcName))
4107 return TokError(Msg: "expected symbol name");
4108 if (parseEOL())
4109 return true;
4110 MCSymbol *ProcSym = getContext().getOrCreateSymbol(Name: ProcName);
4111 getStreamer().emitCVFPOData(ProcSym, Loc: DirLoc);
4112 return false;
4113}
4114
4115/// parseDirectiveCFISections
4116/// ::= .cfi_sections section [, section]
4117bool AsmParser::parseDirectiveCFISections() {
4118 StringRef Name;
4119 bool EH = false;
4120 bool Debug = false;
4121
4122 if (!parseOptionalToken(T: AsmToken::EndOfStatement)) {
4123 for (;;) {
4124 if (parseIdentifier(Res&: Name))
4125 return TokError(Msg: "expected .eh_frame or .debug_frame");
4126 if (Name == ".eh_frame")
4127 EH = true;
4128 else if (Name == ".debug_frame")
4129 Debug = true;
4130 if (parseOptionalToken(T: AsmToken::EndOfStatement))
4131 break;
4132 if (parseComma())
4133 return true;
4134 }
4135 }
4136 getStreamer().emitCFISections(EH, Debug);
4137 return false;
4138}
4139
4140/// parseDirectiveCFIStartProc
4141/// ::= .cfi_startproc [simple]
4142bool AsmParser::parseDirectiveCFIStartProc() {
4143 CFIStartProcLoc = StartTokLoc;
4144
4145 StringRef Simple;
4146 if (!parseOptionalToken(T: AsmToken::EndOfStatement)) {
4147 if (check(P: parseIdentifier(Res&: Simple) || Simple != "simple",
4148 Msg: "unexpected token") ||
4149 parseEOL())
4150 return true;
4151 }
4152
4153 // TODO(kristina): Deal with a corner case of incorrect diagnostic context
4154 // being produced if this directive is emitted as part of preprocessor macro
4155 // expansion which can *ONLY* happen if Clang's cc1as is the API consumer.
4156 // Tools like llvm-mc on the other hand are not affected by it, and report
4157 // correct context information.
4158 getStreamer().emitCFIStartProc(IsSimple: !Simple.empty(), Loc: Lexer.getLoc());
4159 return false;
4160}
4161
4162/// parseDirectiveCFIEndProc
4163/// ::= .cfi_endproc
4164bool AsmParser::parseDirectiveCFIEndProc() {
4165 CFIStartProcLoc = std::nullopt;
4166
4167 if (parseEOL())
4168 return true;
4169
4170 getStreamer().emitCFIEndProc();
4171 return false;
4172}
4173
4174/// parse register name or number.
4175bool AsmParser::parseRegisterOrRegisterNumber(int64_t &Register,
4176 SMLoc DirectiveLoc) {
4177 MCRegister RegNo;
4178
4179 if (getLexer().isNot(K: AsmToken::Integer)) {
4180 if (getTargetParser().parseRegister(Reg&: RegNo, StartLoc&: DirectiveLoc, EndLoc&: DirectiveLoc))
4181 return true;
4182 Register = getContext().getRegisterInfo()->getDwarfRegNum(RegNum: RegNo, isEH: true);
4183 } else
4184 return parseAbsoluteExpression(Res&: Register);
4185
4186 return false;
4187}
4188
4189/// parseDirectiveCFIDefCfa
4190/// ::= .cfi_def_cfa register, offset
4191bool AsmParser::parseDirectiveCFIDefCfa(SMLoc DirectiveLoc) {
4192 int64_t Register = 0, Offset = 0;
4193 if (parseRegisterOrRegisterNumber(Register, DirectiveLoc) || parseComma() ||
4194 parseAbsoluteExpression(Res&: Offset) || parseEOL())
4195 return true;
4196
4197 getStreamer().emitCFIDefCfa(Register, Offset, Loc: DirectiveLoc);
4198 return false;
4199}
4200
4201/// parseDirectiveCFIDefCfaOffset
4202/// ::= .cfi_def_cfa_offset offset
4203bool AsmParser::parseDirectiveCFIDefCfaOffset(SMLoc DirectiveLoc) {
4204 int64_t Offset = 0;
4205 if (parseAbsoluteExpression(Res&: Offset) || parseEOL())
4206 return true;
4207
4208 getStreamer().emitCFIDefCfaOffset(Offset, Loc: DirectiveLoc);
4209 return false;
4210}
4211
4212/// parseDirectiveCFIRegister
4213/// ::= .cfi_register register, register
4214bool AsmParser::parseDirectiveCFIRegister(SMLoc DirectiveLoc) {
4215 int64_t Register1 = 0, Register2 = 0;
4216 if (parseRegisterOrRegisterNumber(Register&: Register1, DirectiveLoc) || parseComma() ||
4217 parseRegisterOrRegisterNumber(Register&: Register2, DirectiveLoc) || parseEOL())
4218 return true;
4219
4220 getStreamer().emitCFIRegister(Register1, Register2, Loc: DirectiveLoc);
4221 return false;
4222}
4223
4224/// parseDirectiveCFIWindowSave
4225/// ::= .cfi_window_save
4226bool AsmParser::parseDirectiveCFIWindowSave(SMLoc DirectiveLoc) {
4227 if (parseEOL())
4228 return true;
4229 getStreamer().emitCFIWindowSave(Loc: DirectiveLoc);
4230 return false;
4231}
4232
4233/// parseDirectiveCFIAdjustCfaOffset
4234/// ::= .cfi_adjust_cfa_offset adjustment
4235bool AsmParser::parseDirectiveCFIAdjustCfaOffset(SMLoc DirectiveLoc) {
4236 int64_t Adjustment = 0;
4237 if (parseAbsoluteExpression(Res&: Adjustment) || parseEOL())
4238 return true;
4239
4240 getStreamer().emitCFIAdjustCfaOffset(Adjustment, Loc: DirectiveLoc);
4241 return false;
4242}
4243
4244/// parseDirectiveCFIDefCfaRegister
4245/// ::= .cfi_def_cfa_register register
4246bool AsmParser::parseDirectiveCFIDefCfaRegister(SMLoc DirectiveLoc) {
4247 int64_t Register = 0;
4248 if (parseRegisterOrRegisterNumber(Register, DirectiveLoc) || parseEOL())
4249 return true;
4250
4251 getStreamer().emitCFIDefCfaRegister(Register, Loc: DirectiveLoc);
4252 return false;
4253}
4254
4255/// parseDirectiveCFILLVMDefAspaceCfa
4256/// ::= .cfi_llvm_def_aspace_cfa register, offset, address_space
4257bool AsmParser::parseDirectiveCFILLVMDefAspaceCfa(SMLoc DirectiveLoc) {
4258 int64_t Register = 0, Offset = 0, AddressSpace = 0;
4259 if (parseRegisterOrRegisterNumber(Register, DirectiveLoc) || parseComma() ||
4260 parseAbsoluteExpression(Res&: Offset) || parseComma() ||
4261 parseAbsoluteExpression(Res&: AddressSpace) || parseEOL())
4262 return true;
4263
4264 getStreamer().emitCFILLVMDefAspaceCfa(Register, Offset, AddressSpace,
4265 Loc: DirectiveLoc);
4266 return false;
4267}
4268
4269/// parseDirectiveCFIOffset
4270/// ::= .cfi_offset register, offset
4271bool AsmParser::parseDirectiveCFIOffset(SMLoc DirectiveLoc) {
4272 int64_t Register = 0;
4273 int64_t Offset = 0;
4274
4275 if (parseRegisterOrRegisterNumber(Register, DirectiveLoc) || parseComma() ||
4276 parseAbsoluteExpression(Res&: Offset) || parseEOL())
4277 return true;
4278
4279 getStreamer().emitCFIOffset(Register, Offset, Loc: DirectiveLoc);
4280 return false;
4281}
4282
4283/// parseDirectiveCFIRelOffset
4284/// ::= .cfi_rel_offset register, offset
4285bool AsmParser::parseDirectiveCFIRelOffset(SMLoc DirectiveLoc) {
4286 int64_t Register = 0, Offset = 0;
4287
4288 if (parseRegisterOrRegisterNumber(Register, DirectiveLoc) || parseComma() ||
4289 parseAbsoluteExpression(Res&: Offset) || parseEOL())
4290 return true;
4291
4292 getStreamer().emitCFIRelOffset(Register, Offset, Loc: DirectiveLoc);
4293 return false;
4294}
4295
4296static bool isValidEncoding(int64_t Encoding) {
4297 if (Encoding & ~0xff)
4298 return false;
4299
4300 if (Encoding == dwarf::DW_EH_PE_omit)
4301 return true;
4302
4303 const unsigned Format = Encoding & 0xf;
4304 if (Format != dwarf::DW_EH_PE_absptr && Format != dwarf::DW_EH_PE_udata2 &&
4305 Format != dwarf::DW_EH_PE_udata4 && Format != dwarf::DW_EH_PE_udata8 &&
4306 Format != dwarf::DW_EH_PE_sdata2 && Format != dwarf::DW_EH_PE_sdata4 &&
4307 Format != dwarf::DW_EH_PE_sdata8 && Format != dwarf::DW_EH_PE_signed)
4308 return false;
4309
4310 const unsigned Application = Encoding & 0x70;
4311 if (Application != dwarf::DW_EH_PE_absptr &&
4312 Application != dwarf::DW_EH_PE_pcrel)
4313 return false;
4314
4315 return true;
4316}
4317
4318/// parseDirectiveCFIPersonalityOrLsda
4319/// IsPersonality true for cfi_personality, false for cfi_lsda
4320/// ::= .cfi_personality encoding, [symbol_name]
4321/// ::= .cfi_lsda encoding, [symbol_name]
4322bool AsmParser::parseDirectiveCFIPersonalityOrLsda(bool IsPersonality) {
4323 int64_t Encoding = 0;
4324 if (parseAbsoluteExpression(Res&: Encoding))
4325 return true;
4326 if (Encoding == dwarf::DW_EH_PE_omit)
4327 return false;
4328
4329 StringRef Name;
4330 if (check(P: !isValidEncoding(Encoding), Msg: "unsupported encoding.") ||
4331 parseComma() ||
4332 check(P: parseIdentifier(Res&: Name), Msg: "expected identifier in directive") ||
4333 parseEOL())
4334 return true;
4335
4336 MCSymbol *Sym = getContext().getOrCreateSymbol(Name);
4337
4338 if (IsPersonality)
4339 getStreamer().emitCFIPersonality(Sym, Encoding);
4340 else
4341 getStreamer().emitCFILsda(Sym, Encoding);
4342 return false;
4343}
4344
4345/// parseDirectiveCFIRememberState
4346/// ::= .cfi_remember_state
4347bool AsmParser::parseDirectiveCFIRememberState(SMLoc DirectiveLoc) {
4348 if (parseEOL())
4349 return true;
4350 getStreamer().emitCFIRememberState(Loc: DirectiveLoc);
4351 return false;
4352}
4353
4354/// parseDirectiveCFIRestoreState
4355/// ::= .cfi_remember_state
4356bool AsmParser::parseDirectiveCFIRestoreState(SMLoc DirectiveLoc) {
4357 if (parseEOL())
4358 return true;
4359 getStreamer().emitCFIRestoreState(Loc: DirectiveLoc);
4360 return false;
4361}
4362
4363/// parseDirectiveCFISameValue
4364/// ::= .cfi_same_value register
4365bool AsmParser::parseDirectiveCFISameValue(SMLoc DirectiveLoc) {
4366 int64_t Register = 0;
4367
4368 if (parseRegisterOrRegisterNumber(Register, DirectiveLoc) || parseEOL())
4369 return true;
4370
4371 getStreamer().emitCFISameValue(Register, Loc: DirectiveLoc);
4372 return false;
4373}
4374
4375/// parseDirectiveCFIRestore
4376/// ::= .cfi_restore register
4377bool AsmParser::parseDirectiveCFIRestore(SMLoc DirectiveLoc) {
4378 int64_t Register = 0;
4379 if (parseRegisterOrRegisterNumber(Register, DirectiveLoc) || parseEOL())
4380 return true;
4381
4382 getStreamer().emitCFIRestore(Register, Loc: DirectiveLoc);
4383 return false;
4384}
4385
4386/// parseDirectiveCFIEscape
4387/// ::= .cfi_escape expression[,...]
4388bool AsmParser::parseDirectiveCFIEscape(SMLoc DirectiveLoc) {
4389 std::string Values;
4390 int64_t CurrValue;
4391 if (parseAbsoluteExpression(Res&: CurrValue))
4392 return true;
4393
4394 Values.push_back(c: (uint8_t)CurrValue);
4395
4396 while (getLexer().is(K: AsmToken::Comma)) {
4397 Lex();
4398
4399 if (parseAbsoluteExpression(Res&: CurrValue))
4400 return true;
4401
4402 Values.push_back(c: (uint8_t)CurrValue);
4403 }
4404
4405 getStreamer().emitCFIEscape(Values, Loc: DirectiveLoc);
4406 return false;
4407}
4408
4409/// parseDirectiveCFIReturnColumn
4410/// ::= .cfi_return_column register
4411bool AsmParser::parseDirectiveCFIReturnColumn(SMLoc DirectiveLoc) {
4412 int64_t Register = 0;
4413 if (parseRegisterOrRegisterNumber(Register, DirectiveLoc) || parseEOL())
4414 return true;
4415 getStreamer().emitCFIReturnColumn(Register);
4416 return false;
4417}
4418
4419/// parseDirectiveCFISignalFrame
4420/// ::= .cfi_signal_frame
4421bool AsmParser::parseDirectiveCFISignalFrame(SMLoc DirectiveLoc) {
4422 if (parseEOL())
4423 return true;
4424
4425 getStreamer().emitCFISignalFrame();
4426 return false;
4427}
4428
4429/// parseDirectiveCFIUndefined
4430/// ::= .cfi_undefined register
4431bool AsmParser::parseDirectiveCFIUndefined(SMLoc DirectiveLoc) {
4432 int64_t Register = 0;
4433
4434 if (parseRegisterOrRegisterNumber(Register, DirectiveLoc) || parseEOL())
4435 return true;
4436
4437 getStreamer().emitCFIUndefined(Register, Loc: DirectiveLoc);
4438 return false;
4439}
4440
4441/// parseDirectiveCFILabel
4442/// ::= .cfi_label label
4443bool AsmParser::parseDirectiveCFILabel(SMLoc Loc) {
4444 StringRef Name;
4445 Loc = Lexer.getLoc();
4446 if (parseIdentifier(Res&: Name))
4447 return TokError(Msg: "expected identifier");
4448 if (parseEOL())
4449 return true;
4450 getStreamer().emitCFILabelDirective(Loc, Name);
4451 return false;
4452}
4453
4454/// parseDirectiveCFIValOffset
4455/// ::= .cfi_val_offset register, offset
4456bool AsmParser::parseDirectiveCFIValOffset(SMLoc DirectiveLoc) {
4457 int64_t Register = 0;
4458 int64_t Offset = 0;
4459
4460 if (parseRegisterOrRegisterNumber(Register, DirectiveLoc) || parseComma() ||
4461 parseAbsoluteExpression(Res&: Offset) || parseEOL())
4462 return true;
4463
4464 getStreamer().emitCFIValOffset(Register, Offset, Loc: DirectiveLoc);
4465 return false;
4466}
4467
4468/// parseDirectiveAltmacro
4469/// ::= .altmacro
4470/// ::= .noaltmacro
4471bool AsmParser::parseDirectiveAltmacro(StringRef Directive) {
4472 if (parseEOL())
4473 return true;
4474 AltMacroMode = (Directive == ".altmacro");
4475 return false;
4476}
4477
4478/// parseDirectiveMacrosOnOff
4479/// ::= .macros_on
4480/// ::= .macros_off
4481bool AsmParser::parseDirectiveMacrosOnOff(StringRef Directive) {
4482 if (parseEOL())
4483 return true;
4484 setMacrosEnabled(Directive == ".macros_on");
4485 return false;
4486}
4487
4488/// parseDirectiveMacro
4489/// ::= .macro name[,] [parameters]
4490bool AsmParser::parseDirectiveMacro(SMLoc DirectiveLoc) {
4491 StringRef Name;
4492 if (parseIdentifier(Res&: Name))
4493 return TokError(Msg: "expected identifier in '.macro' directive");
4494
4495 if (getLexer().is(K: AsmToken::Comma))
4496 Lex();
4497
4498 MCAsmMacroParameters Parameters;
4499 while (getLexer().isNot(K: AsmToken::EndOfStatement)) {
4500
4501 if (!Parameters.empty() && Parameters.back().Vararg)
4502 return Error(L: Lexer.getLoc(), Msg: "vararg parameter '" +
4503 Parameters.back().Name +
4504 "' should be the last parameter");
4505
4506 MCAsmMacroParameter Parameter;
4507 if (parseIdentifier(Res&: Parameter.Name))
4508 return TokError(Msg: "expected identifier in '.macro' directive");
4509
4510 // Emit an error if two (or more) named parameters share the same name
4511 for (const MCAsmMacroParameter& CurrParam : Parameters)
4512 if (CurrParam.Name == Parameter.Name)
4513 return TokError(Msg: "macro '" + Name + "' has multiple parameters"
4514 " named '" + Parameter.Name + "'");
4515
4516 if (Lexer.is(K: AsmToken::Colon)) {
4517 Lex(); // consume ':'
4518
4519 SMLoc QualLoc;
4520 StringRef Qualifier;
4521
4522 QualLoc = Lexer.getLoc();
4523 if (parseIdentifier(Res&: Qualifier))
4524 return Error(L: QualLoc, Msg: "missing parameter qualifier for "
4525 "'" + Parameter.Name + "' in macro '" + Name + "'");
4526
4527 if (Qualifier == "req")
4528 Parameter.Required = true;
4529 else if (Qualifier == "vararg")
4530 Parameter.Vararg = true;
4531 else
4532 return Error(L: QualLoc, Msg: Qualifier + " is not a valid parameter qualifier "
4533 "for '" + Parameter.Name + "' in macro '" + Name + "'");
4534 }
4535
4536 if (getLexer().is(K: AsmToken::Equal)) {
4537 Lex();
4538
4539 SMLoc ParamLoc;
4540
4541 ParamLoc = Lexer.getLoc();
4542 if (parseMacroArgument(MA&: Parameter.Value, /*Vararg=*/false ))
4543 return true;
4544
4545 if (Parameter.Required)
4546 Warning(L: ParamLoc, Msg: "pointless default value for required parameter "
4547 "'" + Parameter.Name + "' in macro '" + Name + "'");
4548 }
4549
4550 Parameters.push_back(x: std::move(Parameter));
4551
4552 if (getLexer().is(K: AsmToken::Comma))
4553 Lex();
4554 }
4555
4556 // Eat just the end of statement.
4557 Lexer.Lex();
4558
4559 // Consuming deferred text, so use Lexer.Lex to ignore Lexing Errors
4560 AsmToken EndToken, StartToken = getTok();
4561 unsigned MacroDepth = 0;
4562 // Lex the macro definition.
4563 while (true) {
4564 // Ignore Lexing errors in macros.
4565 while (Lexer.is(K: AsmToken::Error)) {
4566 Lexer.Lex();
4567 }
4568
4569 // Check whether we have reached the end of the file.
4570 if (getLexer().is(K: AsmToken::Eof))
4571 return Error(L: DirectiveLoc, Msg: "no matching '.endmacro' in definition");
4572
4573 // Otherwise, check whether we have reach the .endmacro or the start of a
4574 // preprocessor line marker.
4575 if (getLexer().is(K: AsmToken::Identifier)) {
4576 if (getTok().getIdentifier() == ".endm" ||
4577 getTok().getIdentifier() == ".endmacro") {
4578 if (MacroDepth == 0) { // Outermost macro.
4579 EndToken = getTok();
4580 Lexer.Lex();
4581 if (getLexer().isNot(K: AsmToken::EndOfStatement))
4582 return TokError(Msg: "unexpected token in '" + EndToken.getIdentifier() +
4583 "' directive");
4584 break;
4585 } else {
4586 // Otherwise we just found the end of an inner macro.
4587 --MacroDepth;
4588 }
4589 } else if (getTok().getIdentifier() == ".macro") {
4590 // We allow nested macros. Those aren't instantiated until the outermost
4591 // macro is expanded so just ignore them for now.
4592 ++MacroDepth;
4593 }
4594 } else if (Lexer.is(K: AsmToken::HashDirective)) {
4595 (void)parseCppHashLineFilenameComment(L: getLexer().getLoc());
4596 }
4597
4598 // Otherwise, scan til the end of the statement.
4599 eatToEndOfStatement();
4600 }
4601
4602 if (getContext().lookupMacro(Name)) {
4603 return Error(L: DirectiveLoc, Msg: "macro '" + Name + "' is already defined");
4604 }
4605
4606 const char *BodyStart = StartToken.getLoc().getPointer();
4607 const char *BodyEnd = EndToken.getLoc().getPointer();
4608 StringRef Body = StringRef(BodyStart, BodyEnd - BodyStart);
4609 checkForBadMacro(DirectiveLoc, Name, Body, Parameters);
4610 MCAsmMacro Macro(Name, Body, std::move(Parameters));
4611 DEBUG_WITH_TYPE("asm-macros", dbgs() << "Defining new macro:\n";
4612 Macro.dump());
4613 getContext().defineMacro(Name, Macro: std::move(Macro));
4614 return false;
4615}
4616
4617/// checkForBadMacro
4618///
4619/// With the support added for named parameters there may be code out there that
4620/// is transitioning from positional parameters. In versions of gas that did
4621/// not support named parameters they would be ignored on the macro definition.
4622/// But to support both styles of parameters this is not possible so if a macro
4623/// definition has named parameters but does not use them and has what appears
4624/// to be positional parameters, strings like $1, $2, ... and $n, then issue a
4625/// warning that the positional parameter found in body which have no effect.
4626/// Hoping the developer will either remove the named parameters from the macro
4627/// definition so the positional parameters get used if that was what was
4628/// intended or change the macro to use the named parameters. It is possible
4629/// this warning will trigger when the none of the named parameters are used
4630/// and the strings like $1 are infact to simply to be passed trough unchanged.
4631void AsmParser::checkForBadMacro(SMLoc DirectiveLoc, StringRef Name,
4632 StringRef Body,
4633 ArrayRef<MCAsmMacroParameter> Parameters) {
4634 // If this macro is not defined with named parameters the warning we are
4635 // checking for here doesn't apply.
4636 unsigned NParameters = Parameters.size();
4637 if (NParameters == 0)
4638 return;
4639
4640 bool NamedParametersFound = false;
4641 bool PositionalParametersFound = false;
4642
4643 // Look at the body of the macro for use of both the named parameters and what
4644 // are likely to be positional parameters. This is what expandMacro() is
4645 // doing when it finds the parameters in the body.
4646 while (!Body.empty()) {
4647 // Scan for the next possible parameter.
4648 std::size_t End = Body.size(), Pos = 0;
4649 for (; Pos != End; ++Pos) {
4650 // Check for a substitution or escape.
4651 // This macro is defined with parameters, look for \foo, \bar, etc.
4652 if (Body[Pos] == '\\' && Pos + 1 != End)
4653 break;
4654
4655 // This macro should have parameters, but look for $0, $1, ..., $n too.
4656 if (Body[Pos] != '$' || Pos + 1 == End)
4657 continue;
4658 char Next = Body[Pos + 1];
4659 if (Next == '$' || Next == 'n' ||
4660 isdigit(static_cast<unsigned char>(Next)))
4661 break;
4662 }
4663
4664 // Check if we reached the end.
4665 if (Pos == End)
4666 break;
4667
4668 if (Body[Pos] == '$') {
4669 switch (Body[Pos + 1]) {
4670 // $$ => $
4671 case '$':
4672 break;
4673
4674 // $n => number of arguments
4675 case 'n':
4676 PositionalParametersFound = true;
4677 break;
4678
4679 // $[0-9] => argument
4680 default: {
4681 PositionalParametersFound = true;
4682 break;
4683 }
4684 }
4685 Pos += 2;
4686 } else {
4687 unsigned I = Pos + 1;
4688 while (isIdentifierChar(c: Body[I]) && I + 1 != End)
4689 ++I;
4690
4691 const char *Begin = Body.data() + Pos + 1;
4692 StringRef Argument(Begin, I - (Pos + 1));
4693 unsigned Index = 0;
4694 for (; Index < NParameters; ++Index)
4695 if (Parameters[Index].Name == Argument)
4696 break;
4697
4698 if (Index == NParameters) {
4699 if (Body[Pos + 1] == '(' && Body[Pos + 2] == ')')
4700 Pos += 3;
4701 else {
4702 Pos = I;
4703 }
4704 } else {
4705 NamedParametersFound = true;
4706 Pos += 1 + Argument.size();
4707 }
4708 }
4709 // Update the scan point.
4710 Body = Body.substr(Start: Pos);
4711 }
4712
4713 if (!NamedParametersFound && PositionalParametersFound)
4714 Warning(L: DirectiveLoc, Msg: "macro defined with named parameters which are not "
4715 "used in macro body, possible positional parameter "
4716 "found in body which will have no effect");
4717}
4718
4719/// parseDirectiveExitMacro
4720/// ::= .exitm
4721bool AsmParser::parseDirectiveExitMacro(StringRef Directive) {
4722 if (parseEOL())
4723 return true;
4724
4725 if (!isInsideMacroInstantiation())
4726 return TokError(Msg: "unexpected '" + Directive + "' in file, "
4727 "no current macro definition");
4728
4729 // Exit all conditionals that are active in the current macro.
4730 while (TheCondStack.size() != ActiveMacros.back()->CondStackDepth) {
4731 TheCondState = TheCondStack.back();
4732 TheCondStack.pop_back();
4733 }
4734
4735 handleMacroExit();
4736 return false;
4737}
4738
4739/// parseDirectiveEndMacro
4740/// ::= .endm
4741/// ::= .endmacro
4742bool AsmParser::parseDirectiveEndMacro(StringRef Directive) {
4743 if (getLexer().isNot(K: AsmToken::EndOfStatement))
4744 return TokError(Msg: "unexpected token in '" + Directive + "' directive");
4745
4746 // If we are inside a macro instantiation, terminate the current
4747 // instantiation.
4748 if (isInsideMacroInstantiation()) {
4749 handleMacroExit();
4750 return false;
4751 }
4752
4753 // Otherwise, this .endmacro is a stray entry in the file; well formed
4754 // .endmacro directives are handled during the macro definition parsing.
4755 return TokError(Msg: "unexpected '" + Directive + "' in file, "
4756 "no current macro definition");
4757}
4758
4759/// parseDirectivePurgeMacro
4760/// ::= .purgem name
4761bool AsmParser::parseDirectivePurgeMacro(SMLoc DirectiveLoc) {
4762 StringRef Name;
4763 SMLoc Loc;
4764 if (parseTokenLoc(Loc) ||
4765 check(P: parseIdentifier(Res&: Name), Loc,
4766 Msg: "expected identifier in '.purgem' directive") ||
4767 parseEOL())
4768 return true;
4769
4770 if (!getContext().lookupMacro(Name))
4771 return Error(L: DirectiveLoc, Msg: "macro '" + Name + "' is not defined");
4772
4773 getContext().undefineMacro(Name);
4774 DEBUG_WITH_TYPE("asm-macros", dbgs()
4775 << "Un-defining macro: " << Name << "\n");
4776 return false;
4777}
4778
4779/// parseDirectiveBundleAlignMode
4780/// ::= {.bundle_align_mode} expression
4781bool AsmParser::parseDirectiveBundleAlignMode() {
4782 // Expect a single argument: an expression that evaluates to a constant
4783 // in the inclusive range 0-30.
4784 SMLoc ExprLoc = getLexer().getLoc();
4785 int64_t AlignSizePow2;
4786 if (checkForValidSection() || parseAbsoluteExpression(Res&: AlignSizePow2) ||
4787 parseEOL() ||
4788 check(P: AlignSizePow2 < 0 || AlignSizePow2 > 30, Loc: ExprLoc,
4789 Msg: "invalid bundle alignment size (expected between 0 and 30)"))
4790 return true;
4791
4792 getStreamer().emitBundleAlignMode(Alignment: Align(1ULL << AlignSizePow2));
4793 return false;
4794}
4795
4796/// parseDirectiveBundleLock
4797/// ::= {.bundle_lock} [align_to_end]
4798bool AsmParser::parseDirectiveBundleLock() {
4799 if (checkForValidSection())
4800 return true;
4801 bool AlignToEnd = false;
4802
4803 StringRef Option;
4804 SMLoc Loc = getTok().getLoc();
4805 const char *kInvalidOptionError =
4806 "invalid option for '.bundle_lock' directive";
4807
4808 if (!parseOptionalToken(T: AsmToken::EndOfStatement)) {
4809 if (check(P: parseIdentifier(Res&: Option), Loc, Msg: kInvalidOptionError) ||
4810 check(P: Option != "align_to_end", Loc, Msg: kInvalidOptionError) || parseEOL())
4811 return true;
4812 AlignToEnd = true;
4813 }
4814
4815 getStreamer().emitBundleLock(AlignToEnd);
4816 return false;
4817}
4818
4819/// parseDirectiveBundleLock
4820/// ::= {.bundle_lock}
4821bool AsmParser::parseDirectiveBundleUnlock() {
4822 if (checkForValidSection() || parseEOL())
4823 return true;
4824
4825 getStreamer().emitBundleUnlock();
4826 return false;
4827}
4828
4829/// parseDirectiveSpace
4830/// ::= (.skip | .space) expression [ , expression ]
4831bool AsmParser::parseDirectiveSpace(StringRef IDVal) {
4832 SMLoc NumBytesLoc = Lexer.getLoc();
4833 const MCExpr *NumBytes;
4834 if (checkForValidSection() || parseExpression(Res&: NumBytes))
4835 return true;
4836
4837 int64_t FillExpr = 0;
4838 if (parseOptionalToken(T: AsmToken::Comma))
4839 if (parseAbsoluteExpression(Res&: FillExpr))
4840 return true;
4841 if (parseEOL())
4842 return true;
4843
4844 // FIXME: Sometimes the fill expr is 'nop' if it isn't supplied, instead of 0.
4845 getStreamer().emitFill(NumBytes: *NumBytes, FillValue: FillExpr, Loc: NumBytesLoc);
4846
4847 return false;
4848}
4849
4850/// parseDirectiveDCB
4851/// ::= .dcb.{b, l, w} expression, expression
4852bool AsmParser::parseDirectiveDCB(StringRef IDVal, unsigned Size) {
4853 SMLoc NumValuesLoc = Lexer.getLoc();
4854 int64_t NumValues;
4855 if (checkForValidSection() || parseAbsoluteExpression(Res&: NumValues))
4856 return true;
4857
4858 if (NumValues < 0) {
4859 Warning(L: NumValuesLoc, Msg: "'" + Twine(IDVal) + "' directive with negative repeat count has no effect");
4860 return false;
4861 }
4862
4863 if (parseComma())
4864 return true;
4865
4866 const MCExpr *Value;
4867 SMLoc ExprLoc = getLexer().getLoc();
4868 if (parseExpression(Res&: Value))
4869 return true;
4870
4871 // Special case constant expressions to match code generator.
4872 if (const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Val: Value)) {
4873 assert(Size <= 8 && "Invalid size");
4874 uint64_t IntValue = MCE->getValue();
4875 if (!isUIntN(N: 8 * Size, x: IntValue) && !isIntN(N: 8 * Size, x: IntValue))
4876 return Error(L: ExprLoc, Msg: "literal value out of range for directive");
4877 for (uint64_t i = 0, e = NumValues; i != e; ++i)
4878 getStreamer().emitIntValue(Value: IntValue, Size);
4879 } else {
4880 for (uint64_t i = 0, e = NumValues; i != e; ++i)
4881 getStreamer().emitValue(Value, Size, Loc: ExprLoc);
4882 }
4883
4884 return parseEOL();
4885}
4886
4887/// parseDirectiveRealDCB
4888/// ::= .dcb.{d, s} expression, expression
4889bool AsmParser::parseDirectiveRealDCB(StringRef IDVal, const fltSemantics &Semantics) {
4890 SMLoc NumValuesLoc = Lexer.getLoc();
4891 int64_t NumValues;
4892 if (checkForValidSection() || parseAbsoluteExpression(Res&: NumValues))
4893 return true;
4894
4895 if (NumValues < 0) {
4896 Warning(L: NumValuesLoc, Msg: "'" + Twine(IDVal) + "' directive with negative repeat count has no effect");
4897 return false;
4898 }
4899
4900 if (parseComma())
4901 return true;
4902
4903 APInt AsInt;
4904 if (parseRealValue(Semantics, Res&: AsInt) || parseEOL())
4905 return true;
4906
4907 for (uint64_t i = 0, e = NumValues; i != e; ++i)
4908 getStreamer().emitIntValue(Value: AsInt.getLimitedValue(),
4909 Size: AsInt.getBitWidth() / 8);
4910
4911 return false;
4912}
4913
4914/// parseDirectiveDS
4915/// ::= .ds.{b, d, l, p, s, w, x} expression
4916bool AsmParser::parseDirectiveDS(StringRef IDVal, unsigned Size) {
4917 SMLoc NumValuesLoc = Lexer.getLoc();
4918 int64_t NumValues;
4919 if (checkForValidSection() || parseAbsoluteExpression(Res&: NumValues) ||
4920 parseEOL())
4921 return true;
4922
4923 if (NumValues < 0) {
4924 Warning(L: NumValuesLoc, Msg: "'" + Twine(IDVal) + "' directive with negative repeat count has no effect");
4925 return false;
4926 }
4927
4928 for (uint64_t i = 0, e = NumValues; i != e; ++i)
4929 getStreamer().emitFill(NumBytes: Size, FillValue: 0);
4930
4931 return false;
4932}
4933
4934/// parseDirectiveLEB128
4935/// ::= (.sleb128 | .uleb128) [ expression (, expression)* ]
4936bool AsmParser::parseDirectiveLEB128(bool Signed) {
4937 if (checkForValidSection())
4938 return true;
4939
4940 auto parseOp = [&]() -> bool {
4941 const MCExpr *Value;
4942 if (parseExpression(Res&: Value))
4943 return true;
4944 if (Signed)
4945 getStreamer().emitSLEB128Value(Value);
4946 else
4947 getStreamer().emitULEB128Value(Value);
4948 return false;
4949 };
4950
4951 return parseMany(parseOne: parseOp);
4952}
4953
4954/// parseDirectiveSymbolAttribute
4955/// ::= { ".globl", ".weak", ... } [ identifier ( , identifier )* ]
4956bool AsmParser::parseDirectiveSymbolAttribute(MCSymbolAttr Attr) {
4957 auto parseOp = [&]() -> bool {
4958 StringRef Name;
4959 SMLoc Loc = getTok().getLoc();
4960 if (parseIdentifier(Res&: Name))
4961 return Error(L: Loc, Msg: "expected identifier");
4962
4963 if (discardLTOSymbol(Name))
4964 return false;
4965
4966 MCSymbol *Sym = getContext().getOrCreateSymbol(Name);
4967
4968 // Assembler local symbols don't make any sense here, except for directives
4969 // that the symbol should be tagged.
4970 if (Sym->isTemporary() && Attr != MCSA_Memtag)
4971 return Error(L: Loc, Msg: "non-local symbol required");
4972
4973 if (!getStreamer().emitSymbolAttribute(Symbol: Sym, Attribute: Attr))
4974 return Error(L: Loc, Msg: "unable to emit symbol attribute");
4975 return false;
4976 };
4977
4978 return parseMany(parseOne: parseOp);
4979}
4980
4981/// parseDirectiveComm
4982/// ::= ( .comm | .lcomm ) identifier , size_expression [ , align_expression ]
4983bool AsmParser::parseDirectiveComm(bool IsLocal) {
4984 if (checkForValidSection())
4985 return true;
4986
4987 SMLoc IDLoc = getLexer().getLoc();
4988 StringRef Name;
4989 if (parseIdentifier(Res&: Name))
4990 return TokError(Msg: "expected identifier in directive");
4991
4992 // Handle the identifier as the key symbol.
4993 MCSymbol *Sym = getContext().getOrCreateSymbol(Name);
4994
4995 if (parseComma())
4996 return true;
4997
4998 int64_t Size;
4999 SMLoc SizeLoc = getLexer().getLoc();
5000 if (parseAbsoluteExpression(Res&: Size))
5001 return true;
5002
5003 int64_t Pow2Alignment = 0;
5004 SMLoc Pow2AlignmentLoc;
5005 if (getLexer().is(K: AsmToken::Comma)) {
5006 Lex();
5007 Pow2AlignmentLoc = getLexer().getLoc();
5008 if (parseAbsoluteExpression(Res&: Pow2Alignment))
5009 return true;
5010
5011 LCOMM::LCOMMType LCOMM = Lexer.getMAI().getLCOMMDirectiveAlignmentType();
5012 if (IsLocal && LCOMM == LCOMM::NoAlignment)
5013 return Error(L: Pow2AlignmentLoc, Msg: "alignment not supported on this target");
5014
5015 // If this target takes alignments in bytes (not log) validate and convert.
5016 if ((!IsLocal && Lexer.getMAI().getCOMMDirectiveAlignmentIsInBytes()) ||
5017 (IsLocal && LCOMM == LCOMM::ByteAlignment)) {
5018 if (!isPowerOf2_64(Value: Pow2Alignment))
5019 return Error(L: Pow2AlignmentLoc, Msg: "alignment must be a power of 2");
5020 Pow2Alignment = Log2_64(Value: Pow2Alignment);
5021 }
5022 }
5023
5024 if (parseEOL())
5025 return true;
5026
5027 // NOTE: a size of zero for a .comm should create a undefined symbol
5028 // but a size of .lcomm creates a bss symbol of size zero.
5029 if (Size < 0)
5030 return Error(L: SizeLoc, Msg: "size must be non-negative");
5031
5032 Sym->redefineIfPossible();
5033 if (!Sym->isUndefined())
5034 return Error(L: IDLoc, Msg: "invalid symbol redefinition");
5035
5036 // Create the Symbol as a common or local common with Size and Pow2Alignment
5037 if (IsLocal) {
5038 getStreamer().emitLocalCommonSymbol(Symbol: Sym, Size,
5039 ByteAlignment: Align(1ULL << Pow2Alignment));
5040 return false;
5041 }
5042
5043 getStreamer().emitCommonSymbol(Symbol: Sym, Size, ByteAlignment: Align(1ULL << Pow2Alignment));
5044 return false;
5045}
5046
5047/// parseDirectiveAbort
5048/// ::= .abort [... message ...]
5049bool AsmParser::parseDirectiveAbort(SMLoc DirectiveLoc) {
5050 StringRef Str = parseStringToEndOfStatement();
5051 if (parseEOL())
5052 return true;
5053
5054 if (Str.empty())
5055 return Error(L: DirectiveLoc, Msg: ".abort detected. Assembly stopping");
5056
5057 // FIXME: Actually abort assembly here.
5058 return Error(L: DirectiveLoc,
5059 Msg: ".abort '" + Str + "' detected. Assembly stopping");
5060}
5061
5062/// parseDirectiveInclude
5063/// ::= .include "filename"
5064bool AsmParser::parseDirectiveInclude() {
5065 // Allow the strings to have escaped octal character sequence.
5066 std::string Filename;
5067 SMLoc IncludeLoc = getTok().getLoc();
5068
5069 if (check(P: getTok().isNot(K: AsmToken::String),
5070 Msg: "expected string in '.include' directive") ||
5071 parseEscapedString(Data&: Filename) ||
5072 check(P: getTok().isNot(K: AsmToken::EndOfStatement),
5073 Msg: "unexpected token in '.include' directive") ||
5074 // Attempt to switch the lexer to the included file before consuming the
5075 // end of statement to avoid losing it when we switch.
5076 check(P: enterIncludeFile(Filename), Loc: IncludeLoc,
5077 Msg: "Could not find include file '" + Filename + "'"))
5078 return true;
5079
5080 return false;
5081}
5082
5083/// parseDirectiveIncbin
5084/// ::= .incbin "filename" [ , skip [ , count ] ]
5085bool AsmParser::parseDirectiveIncbin() {
5086 // Allow the strings to have escaped octal character sequence.
5087 std::string Filename;
5088 SMLoc IncbinLoc = getTok().getLoc();
5089 if (check(P: getTok().isNot(K: AsmToken::String),
5090 Msg: "expected string in '.incbin' directive") ||
5091 parseEscapedString(Data&: Filename))
5092 return true;
5093
5094 int64_t Skip = 0;
5095 const MCExpr *Count = nullptr;
5096 SMLoc SkipLoc, CountLoc;
5097 if (parseOptionalToken(T: AsmToken::Comma)) {
5098 // The skip expression can be omitted while specifying the count, e.g:
5099 // .incbin "filename",,4
5100 if (getTok().isNot(K: AsmToken::Comma)) {
5101 if (parseTokenLoc(Loc&: SkipLoc) || parseAbsoluteExpression(Res&: Skip))
5102 return true;
5103 }
5104 if (parseOptionalToken(T: AsmToken::Comma)) {
5105 CountLoc = getTok().getLoc();
5106 if (parseExpression(Res&: Count))
5107 return true;
5108 }
5109 }
5110
5111 if (parseEOL())
5112 return true;
5113
5114 if (check(P: Skip < 0, Loc: SkipLoc, Msg: "skip is negative"))
5115 return true;
5116
5117 // Attempt to process the included file.
5118 if (processIncbinFile(Filename, Skip, Count, Loc: CountLoc))
5119 return Error(L: IncbinLoc, Msg: "Could not find incbin file '" + Filename + "'");
5120 return false;
5121}
5122
5123/// parseDirectiveIf
5124/// ::= .if{,eq,ge,gt,le,lt,ne} expression
5125bool AsmParser::parseDirectiveIf(SMLoc DirectiveLoc, DirectiveKind DirKind) {
5126 TheCondStack.push_back(x: TheCondState);
5127 TheCondState.TheCond = AsmCond::IfCond;
5128 if (TheCondState.Ignore) {
5129 eatToEndOfStatement();
5130 } else {
5131 int64_t ExprValue;
5132 if (parseAbsoluteExpression(Res&: ExprValue) || parseEOL())
5133 return true;
5134
5135 switch (DirKind) {
5136 default:
5137 llvm_unreachable("unsupported directive");
5138 case DK_IF:
5139 case DK_IFNE:
5140 break;
5141 case DK_IFEQ:
5142 ExprValue = ExprValue == 0;
5143 break;
5144 case DK_IFGE:
5145 ExprValue = ExprValue >= 0;
5146 break;
5147 case DK_IFGT:
5148 ExprValue = ExprValue > 0;
5149 break;
5150 case DK_IFLE:
5151 ExprValue = ExprValue <= 0;
5152 break;
5153 case DK_IFLT:
5154 ExprValue = ExprValue < 0;
5155 break;
5156 }
5157
5158 TheCondState.CondMet = ExprValue;
5159 TheCondState.Ignore = !TheCondState.CondMet;
5160 }
5161
5162 return false;
5163}
5164
5165/// parseDirectiveIfb
5166/// ::= .ifb string
5167bool AsmParser::parseDirectiveIfb(SMLoc DirectiveLoc, bool ExpectBlank) {
5168 TheCondStack.push_back(x: TheCondState);
5169 TheCondState.TheCond = AsmCond::IfCond;
5170
5171 if (TheCondState.Ignore) {
5172 eatToEndOfStatement();
5173 } else {
5174 StringRef Str = parseStringToEndOfStatement();
5175
5176 if (parseEOL())
5177 return true;
5178
5179 TheCondState.CondMet = ExpectBlank == Str.empty();
5180 TheCondState.Ignore = !TheCondState.CondMet;
5181 }
5182
5183 return false;
5184}
5185
5186/// parseDirectiveIfc
5187/// ::= .ifc string1, string2
5188/// ::= .ifnc string1, string2
5189bool AsmParser::parseDirectiveIfc(SMLoc DirectiveLoc, bool ExpectEqual) {
5190 TheCondStack.push_back(x: TheCondState);
5191 TheCondState.TheCond = AsmCond::IfCond;
5192
5193 if (TheCondState.Ignore) {
5194 eatToEndOfStatement();
5195 } else {
5196 StringRef Str1 = parseStringToComma();
5197
5198 if (parseComma())
5199 return true;
5200
5201 StringRef Str2 = parseStringToEndOfStatement();
5202
5203 if (parseEOL())
5204 return true;
5205
5206 TheCondState.CondMet = ExpectEqual == (Str1.trim() == Str2.trim());
5207 TheCondState.Ignore = !TheCondState.CondMet;
5208 }
5209
5210 return false;
5211}
5212
5213/// parseDirectiveIfeqs
5214/// ::= .ifeqs string1, string2
5215bool AsmParser::parseDirectiveIfeqs(SMLoc DirectiveLoc, bool ExpectEqual) {
5216 TheCondStack.push_back(x: TheCondState);
5217 TheCondState.TheCond = AsmCond::IfCond;
5218
5219 if (TheCondState.Ignore) {
5220 eatToEndOfStatement();
5221 } else {
5222 if (Lexer.isNot(K: AsmToken::String)) {
5223 if (ExpectEqual)
5224 return TokError(Msg: "expected string parameter for '.ifeqs' directive");
5225 return TokError(Msg: "expected string parameter for '.ifnes' directive");
5226 }
5227
5228 StringRef String1 = getTok().getStringContents();
5229 Lex();
5230
5231 if (Lexer.isNot(K: AsmToken::Comma)) {
5232 if (ExpectEqual)
5233 return TokError(
5234 Msg: "expected comma after first string for '.ifeqs' directive");
5235 return TokError(
5236 Msg: "expected comma after first string for '.ifnes' directive");
5237 }
5238
5239 Lex();
5240
5241 if (Lexer.isNot(K: AsmToken::String)) {
5242 if (ExpectEqual)
5243 return TokError(Msg: "expected string parameter for '.ifeqs' directive");
5244 return TokError(Msg: "expected string parameter for '.ifnes' directive");
5245 }
5246
5247 StringRef String2 = getTok().getStringContents();
5248 Lex();
5249
5250 TheCondState.CondMet = ExpectEqual == (String1 == String2);
5251 TheCondState.Ignore = !TheCondState.CondMet;
5252 }
5253
5254 return false;
5255}
5256
5257/// parseDirectiveIfdef
5258/// ::= .ifdef symbol
5259bool AsmParser::parseDirectiveIfdef(SMLoc DirectiveLoc, bool expect_defined) {
5260 StringRef Name;
5261 TheCondStack.push_back(x: TheCondState);
5262 TheCondState.TheCond = AsmCond::IfCond;
5263
5264 if (TheCondState.Ignore) {
5265 eatToEndOfStatement();
5266 } else {
5267 if (check(P: parseIdentifier(Res&: Name), Msg: "expected identifier after '.ifdef'") ||
5268 parseEOL())
5269 return true;
5270
5271 MCSymbol *Sym = getContext().lookupSymbol(Name);
5272
5273 if (expect_defined)
5274 TheCondState.CondMet = (Sym && !Sym->isUndefined());
5275 else
5276 TheCondState.CondMet = (!Sym || Sym->isUndefined());
5277 TheCondState.Ignore = !TheCondState.CondMet;
5278 }
5279
5280 return false;
5281}
5282
5283/// parseDirectiveElseIf
5284/// ::= .elseif expression
5285bool AsmParser::parseDirectiveElseIf(SMLoc DirectiveLoc) {
5286 if (TheCondState.TheCond != AsmCond::IfCond &&
5287 TheCondState.TheCond != AsmCond::ElseIfCond)
5288 return Error(L: DirectiveLoc, Msg: "Encountered a .elseif that doesn't follow an"
5289 " .if or an .elseif");
5290 TheCondState.TheCond = AsmCond::ElseIfCond;
5291
5292 bool LastIgnoreState = false;
5293 if (!TheCondStack.empty())
5294 LastIgnoreState = TheCondStack.back().Ignore;
5295 if (LastIgnoreState || TheCondState.CondMet) {
5296 TheCondState.Ignore = true;
5297 eatToEndOfStatement();
5298 } else {
5299 int64_t ExprValue;
5300 if (parseAbsoluteExpression(Res&: ExprValue))
5301 return true;
5302
5303 if (parseEOL())
5304 return true;
5305
5306 TheCondState.CondMet = ExprValue;
5307 TheCondState.Ignore = !TheCondState.CondMet;
5308 }
5309
5310 return false;
5311}
5312
5313/// parseDirectiveElse
5314/// ::= .else
5315bool AsmParser::parseDirectiveElse(SMLoc DirectiveLoc) {
5316 if (parseEOL())
5317 return true;
5318
5319 if (TheCondState.TheCond != AsmCond::IfCond &&
5320 TheCondState.TheCond != AsmCond::ElseIfCond)
5321 return Error(L: DirectiveLoc, Msg: "Encountered a .else that doesn't follow "
5322 " an .if or an .elseif");
5323 TheCondState.TheCond = AsmCond::ElseCond;
5324 bool LastIgnoreState = false;
5325 if (!TheCondStack.empty())
5326 LastIgnoreState = TheCondStack.back().Ignore;
5327 if (LastIgnoreState || TheCondState.CondMet)
5328 TheCondState.Ignore = true;
5329 else
5330 TheCondState.Ignore = false;
5331
5332 return false;
5333}
5334
5335/// parseDirectiveEnd
5336/// ::= .end
5337bool AsmParser::parseDirectiveEnd(SMLoc DirectiveLoc) {
5338 if (parseEOL())
5339 return true;
5340
5341 while (Lexer.isNot(K: AsmToken::Eof))
5342 Lexer.Lex();
5343
5344 return false;
5345}
5346
5347/// parseDirectiveError
5348/// ::= .err
5349/// ::= .error [string]
5350bool AsmParser::parseDirectiveError(SMLoc L, bool WithMessage) {
5351 if (!TheCondStack.empty()) {
5352 if (TheCondStack.back().Ignore) {
5353 eatToEndOfStatement();
5354 return false;
5355 }
5356 }
5357
5358 if (!WithMessage)
5359 return Error(L, Msg: ".err encountered");
5360
5361 StringRef Message = ".error directive invoked in source file";
5362 if (Lexer.isNot(K: AsmToken::EndOfStatement)) {
5363 if (Lexer.isNot(K: AsmToken::String))
5364 return TokError(Msg: ".error argument must be a string");
5365
5366 Message = getTok().getStringContents();
5367 Lex();
5368 }
5369
5370 return Error(L, Msg: Message);
5371}
5372
5373/// parseDirectiveWarning
5374/// ::= .warning [string]
5375bool AsmParser::parseDirectiveWarning(SMLoc L) {
5376 if (!TheCondStack.empty()) {
5377 if (TheCondStack.back().Ignore) {
5378 eatToEndOfStatement();
5379 return false;
5380 }
5381 }
5382
5383 StringRef Message = ".warning directive invoked in source file";
5384
5385 if (!parseOptionalToken(T: AsmToken::EndOfStatement)) {
5386 if (Lexer.isNot(K: AsmToken::String))
5387 return TokError(Msg: ".warning argument must be a string");
5388
5389 Message = getTok().getStringContents();
5390 Lex();
5391 if (parseEOL())
5392 return true;
5393 }
5394
5395 return Warning(L, Msg: Message);
5396}
5397
5398/// parseDirectiveEndIf
5399/// ::= .endif
5400bool AsmParser::parseDirectiveEndIf(SMLoc DirectiveLoc) {
5401 if (parseEOL())
5402 return true;
5403
5404 if ((TheCondState.TheCond == AsmCond::NoCond) || TheCondStack.empty())
5405 return Error(L: DirectiveLoc, Msg: "Encountered a .endif that doesn't follow "
5406 "an .if or .else");
5407 if (!TheCondStack.empty()) {
5408 TheCondState = TheCondStack.back();
5409 TheCondStack.pop_back();
5410 }
5411
5412 return false;
5413}
5414
5415void AsmParser::initializeDirectiveKindMap() {
5416 /* Lookup will be done with the directive
5417 * converted to lower case, so all these
5418 * keys should be lower case.
5419 * (target specific directives are handled
5420 * elsewhere)
5421 */
5422 DirectiveKindMap[".set"] = DK_SET;
5423 DirectiveKindMap[".equ"] = DK_EQU;
5424 DirectiveKindMap[".equiv"] = DK_EQUIV;
5425 DirectiveKindMap[".ascii"] = DK_ASCII;
5426 DirectiveKindMap[".asciz"] = DK_ASCIZ;
5427 DirectiveKindMap[".string"] = DK_STRING;
5428 DirectiveKindMap[".byte"] = DK_BYTE;
5429 DirectiveKindMap[".short"] = DK_SHORT;
5430 DirectiveKindMap[".value"] = DK_VALUE;
5431 DirectiveKindMap[".2byte"] = DK_2BYTE;
5432 DirectiveKindMap[".long"] = DK_LONG;
5433 DirectiveKindMap[".int"] = DK_INT;
5434 DirectiveKindMap[".4byte"] = DK_4BYTE;
5435 DirectiveKindMap[".quad"] = DK_QUAD;
5436 DirectiveKindMap[".8byte"] = DK_8BYTE;
5437 DirectiveKindMap[".octa"] = DK_OCTA;
5438 DirectiveKindMap[".single"] = DK_SINGLE;
5439 DirectiveKindMap[".float"] = DK_FLOAT;
5440 DirectiveKindMap[".double"] = DK_DOUBLE;
5441 DirectiveKindMap[".align"] = DK_ALIGN;
5442 DirectiveKindMap[".align32"] = DK_ALIGN32;
5443 DirectiveKindMap[".balign"] = DK_BALIGN;
5444 DirectiveKindMap[".balignw"] = DK_BALIGNW;
5445 DirectiveKindMap[".balignl"] = DK_BALIGNL;
5446 DirectiveKindMap[".p2align"] = DK_P2ALIGN;
5447 DirectiveKindMap[".p2alignw"] = DK_P2ALIGNW;
5448 DirectiveKindMap[".p2alignl"] = DK_P2ALIGNL;
5449 DirectiveKindMap[".org"] = DK_ORG;
5450 DirectiveKindMap[".fill"] = DK_FILL;
5451 DirectiveKindMap[".zero"] = DK_ZERO;
5452 DirectiveKindMap[".extern"] = DK_EXTERN;
5453 DirectiveKindMap[".globl"] = DK_GLOBL;
5454 DirectiveKindMap[".global"] = DK_GLOBAL;
5455 DirectiveKindMap[".lazy_reference"] = DK_LAZY_REFERENCE;
5456 DirectiveKindMap[".no_dead_strip"] = DK_NO_DEAD_STRIP;
5457 DirectiveKindMap[".symbol_resolver"] = DK_SYMBOL_RESOLVER;
5458 DirectiveKindMap[".private_extern"] = DK_PRIVATE_EXTERN;
5459 DirectiveKindMap[".reference"] = DK_REFERENCE;
5460 DirectiveKindMap[".weak_definition"] = DK_WEAK_DEFINITION;
5461 DirectiveKindMap[".weak_reference"] = DK_WEAK_REFERENCE;
5462 DirectiveKindMap[".weak_def_can_be_hidden"] = DK_WEAK_DEF_CAN_BE_HIDDEN;
5463 DirectiveKindMap[".cold"] = DK_COLD;
5464 DirectiveKindMap[".comm"] = DK_COMM;
5465 DirectiveKindMap[".common"] = DK_COMMON;
5466 DirectiveKindMap[".lcomm"] = DK_LCOMM;
5467 DirectiveKindMap[".abort"] = DK_ABORT;
5468 DirectiveKindMap[".include"] = DK_INCLUDE;
5469 DirectiveKindMap[".incbin"] = DK_INCBIN;
5470 DirectiveKindMap[".code16"] = DK_CODE16;
5471 DirectiveKindMap[".code16gcc"] = DK_CODE16GCC;
5472 DirectiveKindMap[".rept"] = DK_REPT;
5473 DirectiveKindMap[".rep"] = DK_REPT;
5474 DirectiveKindMap[".irp"] = DK_IRP;
5475 DirectiveKindMap[".irpc"] = DK_IRPC;
5476 DirectiveKindMap[".endr"] = DK_ENDR;
5477 DirectiveKindMap[".bundle_align_mode"] = DK_BUNDLE_ALIGN_MODE;
5478 DirectiveKindMap[".bundle_lock"] = DK_BUNDLE_LOCK;
5479 DirectiveKindMap[".bundle_unlock"] = DK_BUNDLE_UNLOCK;
5480 DirectiveKindMap[".if"] = DK_IF;
5481 DirectiveKindMap[".ifeq"] = DK_IFEQ;
5482 DirectiveKindMap[".ifge"] = DK_IFGE;
5483 DirectiveKindMap[".ifgt"] = DK_IFGT;
5484 DirectiveKindMap[".ifle"] = DK_IFLE;
5485 DirectiveKindMap[".iflt"] = DK_IFLT;
5486 DirectiveKindMap[".ifne"] = DK_IFNE;
5487 DirectiveKindMap[".ifb"] = DK_IFB;
5488 DirectiveKindMap[".ifnb"] = DK_IFNB;
5489 DirectiveKindMap[".ifc"] = DK_IFC;
5490 DirectiveKindMap[".ifeqs"] = DK_IFEQS;
5491 DirectiveKindMap[".ifnc"] = DK_IFNC;
5492 DirectiveKindMap[".ifnes"] = DK_IFNES;
5493 DirectiveKindMap[".ifdef"] = DK_IFDEF;
5494 DirectiveKindMap[".ifndef"] = DK_IFNDEF;
5495 DirectiveKindMap[".ifnotdef"] = DK_IFNOTDEF;
5496 DirectiveKindMap[".elseif"] = DK_ELSEIF;
5497 DirectiveKindMap[".else"] = DK_ELSE;
5498 DirectiveKindMap[".end"] = DK_END;
5499 DirectiveKindMap[".endif"] = DK_ENDIF;
5500 DirectiveKindMap[".skip"] = DK_SKIP;
5501 DirectiveKindMap[".space"] = DK_SPACE;
5502 DirectiveKindMap[".file"] = DK_FILE;
5503 DirectiveKindMap[".line"] = DK_LINE;
5504 DirectiveKindMap[".loc"] = DK_LOC;
5505 DirectiveKindMap[".loc_label"] = DK_LOC_LABEL;
5506 DirectiveKindMap[".stabs"] = DK_STABS;
5507 DirectiveKindMap[".cv_file"] = DK_CV_FILE;
5508 DirectiveKindMap[".cv_func_id"] = DK_CV_FUNC_ID;
5509 DirectiveKindMap[".cv_loc"] = DK_CV_LOC;
5510 DirectiveKindMap[".cv_linetable"] = DK_CV_LINETABLE;
5511 DirectiveKindMap[".cv_inline_linetable"] = DK_CV_INLINE_LINETABLE;
5512 DirectiveKindMap[".cv_inline_site_id"] = DK_CV_INLINE_SITE_ID;
5513 DirectiveKindMap[".cv_def_range"] = DK_CV_DEF_RANGE;
5514 DirectiveKindMap[".cv_string"] = DK_CV_STRING;
5515 DirectiveKindMap[".cv_stringtable"] = DK_CV_STRINGTABLE;
5516 DirectiveKindMap[".cv_filechecksums"] = DK_CV_FILECHECKSUMS;
5517 DirectiveKindMap[".cv_filechecksumoffset"] = DK_CV_FILECHECKSUM_OFFSET;
5518 DirectiveKindMap[".cv_fpo_data"] = DK_CV_FPO_DATA;
5519 DirectiveKindMap[".sleb128"] = DK_SLEB128;
5520 DirectiveKindMap[".uleb128"] = DK_ULEB128;
5521 DirectiveKindMap[".cfi_sections"] = DK_CFI_SECTIONS;
5522 DirectiveKindMap[".cfi_startproc"] = DK_CFI_STARTPROC;
5523 DirectiveKindMap[".cfi_endproc"] = DK_CFI_ENDPROC;
5524 DirectiveKindMap[".cfi_def_cfa"] = DK_CFI_DEF_CFA;
5525 DirectiveKindMap[".cfi_def_cfa_offset"] = DK_CFI_DEF_CFA_OFFSET;
5526 DirectiveKindMap[".cfi_adjust_cfa_offset"] = DK_CFI_ADJUST_CFA_OFFSET;
5527 DirectiveKindMap[".cfi_def_cfa_register"] = DK_CFI_DEF_CFA_REGISTER;
5528 DirectiveKindMap[".cfi_llvm_def_aspace_cfa"] = DK_CFI_LLVM_DEF_ASPACE_CFA;
5529 DirectiveKindMap[".cfi_offset"] = DK_CFI_OFFSET;
5530 DirectiveKindMap[".cfi_rel_offset"] = DK_CFI_REL_OFFSET;
5531 DirectiveKindMap[".cfi_personality"] = DK_CFI_PERSONALITY;
5532 DirectiveKindMap[".cfi_lsda"] = DK_CFI_LSDA;
5533 DirectiveKindMap[".cfi_remember_state"] = DK_CFI_REMEMBER_STATE;
5534 DirectiveKindMap[".cfi_restore_state"] = DK_CFI_RESTORE_STATE;
5535 DirectiveKindMap[".cfi_same_value"] = DK_CFI_SAME_VALUE;
5536 DirectiveKindMap[".cfi_restore"] = DK_CFI_RESTORE;
5537 DirectiveKindMap[".cfi_escape"] = DK_CFI_ESCAPE;
5538 DirectiveKindMap[".cfi_return_column"] = DK_CFI_RETURN_COLUMN;
5539 DirectiveKindMap[".cfi_signal_frame"] = DK_CFI_SIGNAL_FRAME;
5540 DirectiveKindMap[".cfi_undefined"] = DK_CFI_UNDEFINED;
5541 DirectiveKindMap[".cfi_register"] = DK_CFI_REGISTER;
5542 DirectiveKindMap[".cfi_window_save"] = DK_CFI_WINDOW_SAVE;
5543 DirectiveKindMap[".cfi_label"] = DK_CFI_LABEL;
5544 DirectiveKindMap[".cfi_b_key_frame"] = DK_CFI_B_KEY_FRAME;
5545 DirectiveKindMap[".cfi_mte_tagged_frame"] = DK_CFI_MTE_TAGGED_FRAME;
5546 DirectiveKindMap[".cfi_val_offset"] = DK_CFI_VAL_OFFSET;
5547 DirectiveKindMap[".macros_on"] = DK_MACROS_ON;
5548 DirectiveKindMap[".macros_off"] = DK_MACROS_OFF;
5549 DirectiveKindMap[".macro"] = DK_MACRO;
5550 DirectiveKindMap[".exitm"] = DK_EXITM;
5551 DirectiveKindMap[".endm"] = DK_ENDM;
5552 DirectiveKindMap[".endmacro"] = DK_ENDMACRO;
5553 DirectiveKindMap[".purgem"] = DK_PURGEM;
5554 DirectiveKindMap[".err"] = DK_ERR;
5555 DirectiveKindMap[".error"] = DK_ERROR;
5556 DirectiveKindMap[".warning"] = DK_WARNING;
5557 DirectiveKindMap[".altmacro"] = DK_ALTMACRO;
5558 DirectiveKindMap[".noaltmacro"] = DK_NOALTMACRO;
5559 DirectiveKindMap[".reloc"] = DK_RELOC;
5560 DirectiveKindMap[".dc"] = DK_DC;
5561 DirectiveKindMap[".dc.a"] = DK_DC_A;
5562 DirectiveKindMap[".dc.b"] = DK_DC_B;
5563 DirectiveKindMap[".dc.d"] = DK_DC_D;
5564 DirectiveKindMap[".dc.l"] = DK_DC_L;
5565 DirectiveKindMap[".dc.s"] = DK_DC_S;
5566 DirectiveKindMap[".dc.w"] = DK_DC_W;
5567 DirectiveKindMap[".dc.x"] = DK_DC_X;
5568 DirectiveKindMap[".dcb"] = DK_DCB;
5569 DirectiveKindMap[".dcb.b"] = DK_DCB_B;
5570 DirectiveKindMap[".dcb.d"] = DK_DCB_D;
5571 DirectiveKindMap[".dcb.l"] = DK_DCB_L;
5572 DirectiveKindMap[".dcb.s"] = DK_DCB_S;
5573 DirectiveKindMap[".dcb.w"] = DK_DCB_W;
5574 DirectiveKindMap[".dcb.x"] = DK_DCB_X;
5575 DirectiveKindMap[".ds"] = DK_DS;
5576 DirectiveKindMap[".ds.b"] = DK_DS_B;
5577 DirectiveKindMap[".ds.d"] = DK_DS_D;
5578 DirectiveKindMap[".ds.l"] = DK_DS_L;
5579 DirectiveKindMap[".ds.p"] = DK_DS_P;
5580 DirectiveKindMap[".ds.s"] = DK_DS_S;
5581 DirectiveKindMap[".ds.w"] = DK_DS_W;
5582 DirectiveKindMap[".ds.x"] = DK_DS_X;
5583 DirectiveKindMap[".print"] = DK_PRINT;
5584 DirectiveKindMap[".addrsig"] = DK_ADDRSIG;
5585 DirectiveKindMap[".addrsig_sym"] = DK_ADDRSIG_SYM;
5586 DirectiveKindMap[".pseudoprobe"] = DK_PSEUDO_PROBE;
5587 DirectiveKindMap[".lto_discard"] = DK_LTO_DISCARD;
5588 DirectiveKindMap[".lto_set_conditional"] = DK_LTO_SET_CONDITIONAL;
5589 DirectiveKindMap[".memtag"] = DK_MEMTAG;
5590}
5591
5592MCAsmMacro *AsmParser::parseMacroLikeBody(SMLoc DirectiveLoc) {
5593 AsmToken EndToken, StartToken = getTok();
5594
5595 unsigned NestLevel = 0;
5596 while (true) {
5597 // Check whether we have reached the end of the file.
5598 if (getLexer().is(K: AsmToken::Eof)) {
5599 printError(L: DirectiveLoc, Msg: "no matching '.endr' in definition");
5600 return nullptr;
5601 }
5602
5603 if (Lexer.is(K: AsmToken::Identifier)) {
5604 StringRef Ident = getTok().getIdentifier();
5605 if (Ident == ".rep" || Ident == ".rept" || Ident == ".irp" ||
5606 Ident == ".irpc") {
5607 ++NestLevel;
5608 } else if (Ident == ".endr") {
5609 if (NestLevel == 0) {
5610 EndToken = getTok();
5611 Lex();
5612 if (Lexer.is(K: AsmToken::EndOfStatement))
5613 break;
5614 printError(L: getTok().getLoc(), Msg: "expected newline");
5615 return nullptr;
5616 }
5617 --NestLevel;
5618 }
5619 }
5620
5621 // Otherwise, scan till the end of the statement.
5622 eatToEndOfStatement();
5623 }
5624
5625 const char *BodyStart = StartToken.getLoc().getPointer();
5626 const char *BodyEnd = EndToken.getLoc().getPointer();
5627 StringRef Body = StringRef(BodyStart, BodyEnd - BodyStart);
5628
5629 // We Are Anonymous.
5630 MacroLikeBodies.emplace_back(args: StringRef(), args&: Body, args: MCAsmMacroParameters());
5631 return &MacroLikeBodies.back();
5632}
5633
5634void AsmParser::instantiateMacroLikeBody(MCAsmMacro *M, SMLoc DirectiveLoc,
5635 raw_svector_ostream &OS) {
5636 OS << ".endr\n";
5637
5638 std::unique_ptr<MemoryBuffer> Instantiation =
5639 MemoryBuffer::getMemBufferCopy(InputData: OS.str(), BufferName: "<instantiation>");
5640
5641 // Create the macro instantiation object and add to the current macro
5642 // instantiation stack.
5643 MacroInstantiation *MI = new MacroInstantiation{
5644 .InstantiationLoc: DirectiveLoc, .ExitBuffer: CurBuffer, .ExitLoc: getTok().getLoc(), .CondStackDepth: TheCondStack.size()};
5645 ActiveMacros.push_back(x: MI);
5646
5647 // Jump to the macro instantiation and prime the lexer.
5648 CurBuffer = SrcMgr.AddNewSourceBuffer(F: std::move(Instantiation), IncludeLoc: SMLoc());
5649 Lexer.setBuffer(Buf: SrcMgr.getMemoryBuffer(i: CurBuffer)->getBuffer());
5650 Lex();
5651}
5652
5653/// parseDirectiveRept
5654/// ::= .rep | .rept count
5655bool AsmParser::parseDirectiveRept(SMLoc DirectiveLoc, StringRef Dir) {
5656 const MCExpr *CountExpr;
5657 SMLoc CountLoc = getTok().getLoc();
5658 if (parseExpression(Res&: CountExpr))
5659 return true;
5660
5661 int64_t Count;
5662 if (!CountExpr->evaluateAsAbsolute(Res&: Count, Asm: getStreamer().getAssemblerPtr())) {
5663 return Error(L: CountLoc, Msg: "unexpected token in '" + Dir + "' directive");
5664 }
5665
5666 if (check(P: Count < 0, Loc: CountLoc, Msg: "Count is negative") || parseEOL())
5667 return true;
5668
5669 // Lex the rept definition.
5670 MCAsmMacro *M = parseMacroLikeBody(DirectiveLoc);
5671 if (!M)
5672 return true;
5673
5674 // Macro instantiation is lexical, unfortunately. We construct a new buffer
5675 // to hold the macro body with substitutions.
5676 SmallString<256> Buf;
5677 raw_svector_ostream OS(Buf);
5678 while (Count--) {
5679 // Note that the AtPseudoVariable is disabled for instantiations of .rep(t).
5680 if (expandMacro(OS, Macro&: *M, Parameters: {}, A: {}, EnableAtPseudoVariable: false))
5681 return true;
5682 }
5683 instantiateMacroLikeBody(M, DirectiveLoc, OS);
5684
5685 return false;
5686}
5687
5688/// parseDirectiveIrp
5689/// ::= .irp symbol,values
5690bool AsmParser::parseDirectiveIrp(SMLoc DirectiveLoc) {
5691 MCAsmMacroParameter Parameter;
5692 MCAsmMacroArguments A;
5693 if (check(P: parseIdentifier(Res&: Parameter.Name),
5694 Msg: "expected identifier in '.irp' directive") ||
5695 parseComma() || parseMacroArguments(M: nullptr, A) || parseEOL())
5696 return true;
5697
5698 // Lex the irp definition.
5699 MCAsmMacro *M = parseMacroLikeBody(DirectiveLoc);
5700 if (!M)
5701 return true;
5702
5703 // Macro instantiation is lexical, unfortunately. We construct a new buffer
5704 // to hold the macro body with substitutions.
5705 SmallString<256> Buf;
5706 raw_svector_ostream OS(Buf);
5707
5708 for (const MCAsmMacroArgument &Arg : A) {
5709 // Note that the AtPseudoVariable is enabled for instantiations of .irp.
5710 // This is undocumented, but GAS seems to support it.
5711 if (expandMacro(OS, Macro&: *M, Parameters: Parameter, A: Arg, EnableAtPseudoVariable: true))
5712 return true;
5713 }
5714
5715 instantiateMacroLikeBody(M, DirectiveLoc, OS);
5716
5717 return false;
5718}
5719
5720/// parseDirectiveIrpc
5721/// ::= .irpc symbol,values
5722bool AsmParser::parseDirectiveIrpc(SMLoc DirectiveLoc) {
5723 MCAsmMacroParameter Parameter;
5724 MCAsmMacroArguments A;
5725
5726 if (check(P: parseIdentifier(Res&: Parameter.Name),
5727 Msg: "expected identifier in '.irpc' directive") ||
5728 parseComma() || parseMacroArguments(M: nullptr, A))
5729 return true;
5730
5731 if (A.size() != 1 || A.front().size() != 1)
5732 return TokError(Msg: "unexpected token in '.irpc' directive");
5733 if (parseEOL())
5734 return true;
5735
5736 // Lex the irpc definition.
5737 MCAsmMacro *M = parseMacroLikeBody(DirectiveLoc);
5738 if (!M)
5739 return true;
5740
5741 // Macro instantiation is lexical, unfortunately. We construct a new buffer
5742 // to hold the macro body with substitutions.
5743 SmallString<256> Buf;
5744 raw_svector_ostream OS(Buf);
5745
5746 StringRef Values = A[0][0].is(K: AsmToken::String) ? A[0][0].getStringContents()
5747 : A[0][0].getString();
5748 for (std::size_t I = 0, End = Values.size(); I != End; ++I) {
5749 MCAsmMacroArgument Arg;
5750 Arg.emplace_back(args: AsmToken::Identifier, args: Values.substr(Start: I, N: 1));
5751
5752 // Note that the AtPseudoVariable is enabled for instantiations of .irpc.
5753 // This is undocumented, but GAS seems to support it.
5754 if (expandMacro(OS, Macro&: *M, Parameters: Parameter, A: Arg, EnableAtPseudoVariable: true))
5755 return true;
5756 }
5757
5758 instantiateMacroLikeBody(M, DirectiveLoc, OS);
5759
5760 return false;
5761}
5762
5763bool AsmParser::parseDirectiveEndr(SMLoc DirectiveLoc) {
5764 if (ActiveMacros.empty())
5765 return TokError(Msg: "unmatched '.endr' directive");
5766
5767 // The only .repl that should get here are the ones created by
5768 // instantiateMacroLikeBody.
5769 assert(getLexer().is(AsmToken::EndOfStatement));
5770
5771 handleMacroExit();
5772 return false;
5773}
5774
5775bool AsmParser::parseDirectiveMSEmit(SMLoc IDLoc, ParseStatementInfo &Info,
5776 size_t Len) {
5777 const MCExpr *Value;
5778 SMLoc ExprLoc = getLexer().getLoc();
5779 if (parseExpression(Res&: Value))
5780 return true;
5781 const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Val: Value);
5782 if (!MCE)
5783 return Error(L: ExprLoc, Msg: "unexpected expression in _emit");
5784 uint64_t IntValue = MCE->getValue();
5785 if (!isUInt<8>(x: IntValue) && !isInt<8>(x: IntValue))
5786 return Error(L: ExprLoc, Msg: "literal value out of range for directive");
5787
5788 Info.AsmRewrites->emplace_back(Args: AOK_Emit, Args&: IDLoc, Args&: Len);
5789 return false;
5790}
5791
5792bool AsmParser::parseDirectiveMSAlign(SMLoc IDLoc, ParseStatementInfo &Info) {
5793 const MCExpr *Value;
5794 SMLoc ExprLoc = getLexer().getLoc();
5795 if (parseExpression(Res&: Value))
5796 return true;
5797 const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Val: Value);
5798 if (!MCE)
5799 return Error(L: ExprLoc, Msg: "unexpected expression in align");
5800 uint64_t IntValue = MCE->getValue();
5801 if (!isPowerOf2_64(Value: IntValue))
5802 return Error(L: ExprLoc, Msg: "literal value not a power of two greater then zero");
5803
5804 Info.AsmRewrites->emplace_back(Args: AOK_Align, Args&: IDLoc, Args: 5, Args: Log2_64(Value: IntValue));
5805 return false;
5806}
5807
5808bool AsmParser::parseDirectivePrint(SMLoc DirectiveLoc) {
5809 const AsmToken StrTok = getTok();
5810 Lex();
5811 if (StrTok.isNot(K: AsmToken::String) || StrTok.getString().front() != '"')
5812 return Error(L: DirectiveLoc, Msg: "expected double quoted string after .print");
5813 if (parseEOL())
5814 return true;
5815 llvm::outs() << StrTok.getStringContents() << '\n';
5816 return false;
5817}
5818
5819bool AsmParser::parseDirectiveAddrsig() {
5820 if (parseEOL())
5821 return true;
5822 getStreamer().emitAddrsig();
5823 return false;
5824}
5825
5826bool AsmParser::parseDirectiveAddrsigSym() {
5827 StringRef Name;
5828 if (check(P: parseIdentifier(Res&: Name), Msg: "expected identifier") || parseEOL())
5829 return true;
5830 MCSymbol *Sym = getContext().getOrCreateSymbol(Name);
5831 getStreamer().emitAddrsigSym(Sym);
5832 return false;
5833}
5834
5835bool AsmParser::parseDirectivePseudoProbe() {
5836 int64_t Guid;
5837 int64_t Index;
5838 int64_t Type;
5839 int64_t Attr;
5840 int64_t Discriminator = 0;
5841 if (parseIntToken(V&: Guid))
5842 return true;
5843 if (parseIntToken(V&: Index))
5844 return true;
5845 if (parseIntToken(V&: Type))
5846 return true;
5847 if (parseIntToken(V&: Attr))
5848 return true;
5849 if (hasDiscriminator(Flags: Attr) && parseIntToken(V&: Discriminator))
5850 return true;
5851
5852 // Parse inline stack like @ GUID:11:12 @ GUID:1:11 @ GUID:3:21
5853 MCPseudoProbeInlineStack InlineStack;
5854
5855 while (getLexer().is(K: AsmToken::At)) {
5856 // eat @
5857 Lex();
5858
5859 int64_t CallerGuid = 0;
5860 if (getLexer().is(K: AsmToken::Integer)) {
5861 CallerGuid = getTok().getIntVal();
5862 Lex();
5863 }
5864
5865 // eat colon
5866 if (getLexer().is(K: AsmToken::Colon))
5867 Lex();
5868
5869 int64_t CallerProbeId = 0;
5870 if (getLexer().is(K: AsmToken::Integer)) {
5871 CallerProbeId = getTok().getIntVal();
5872 Lex();
5873 }
5874
5875 InlineSite Site(CallerGuid, CallerProbeId);
5876 InlineStack.push_back(Elt: Site);
5877 }
5878
5879 // Parse function entry name
5880 StringRef FnName;
5881 if (parseIdentifier(Res&: FnName))
5882 return Error(L: getLexer().getLoc(), Msg: "expected identifier");
5883 MCSymbol *FnSym = getContext().lookupSymbol(Name: FnName);
5884
5885 if (parseEOL())
5886 return true;
5887
5888 getStreamer().emitPseudoProbe(Guid, Index, Type, Attr, Discriminator,
5889 InlineStack, FnSym);
5890 return false;
5891}
5892
5893/// parseDirectiveLTODiscard
5894/// ::= ".lto_discard" [ identifier ( , identifier )* ]
5895/// The LTO library emits this directive to discard non-prevailing symbols.
5896/// We ignore symbol assignments and attribute changes for the specified
5897/// symbols.
5898bool AsmParser::parseDirectiveLTODiscard() {
5899 auto ParseOp = [&]() -> bool {
5900 StringRef Name;
5901 SMLoc Loc = getTok().getLoc();
5902 if (parseIdentifier(Res&: Name))
5903 return Error(L: Loc, Msg: "expected identifier");
5904 LTODiscardSymbols.insert(V: Name);
5905 return false;
5906 };
5907
5908 LTODiscardSymbols.clear();
5909 return parseMany(parseOne: ParseOp);
5910}
5911
5912// We are comparing pointers, but the pointers are relative to a single string.
5913// Thus, this should always be deterministic.
5914static int rewritesSort(const AsmRewrite *AsmRewriteA,
5915 const AsmRewrite *AsmRewriteB) {
5916 if (AsmRewriteA->Loc.getPointer() < AsmRewriteB->Loc.getPointer())
5917 return -1;
5918 if (AsmRewriteB->Loc.getPointer() < AsmRewriteA->Loc.getPointer())
5919 return 1;
5920
5921 // It's possible to have a SizeDirective, Imm/ImmPrefix and an Input/Output
5922 // rewrite to the same location. Make sure the SizeDirective rewrite is
5923 // performed first, then the Imm/ImmPrefix and finally the Input/Output. This
5924 // ensures the sort algorithm is stable.
5925 if (AsmRewritePrecedence[AsmRewriteA->Kind] >
5926 AsmRewritePrecedence[AsmRewriteB->Kind])
5927 return -1;
5928
5929 if (AsmRewritePrecedence[AsmRewriteA->Kind] <
5930 AsmRewritePrecedence[AsmRewriteB->Kind])
5931 return 1;
5932 llvm_unreachable("Unstable rewrite sort.");
5933}
5934
5935bool AsmParser::parseMSInlineAsm(
5936 std::string &AsmString, unsigned &NumOutputs, unsigned &NumInputs,
5937 SmallVectorImpl<std::pair<void *, bool>> &OpDecls,
5938 SmallVectorImpl<std::string> &Constraints,
5939 SmallVectorImpl<std::string> &Clobbers, const MCInstrInfo *MII,
5940 MCInstPrinter *IP, MCAsmParserSemaCallback &SI) {
5941 SmallVector<void *, 4> InputDecls;
5942 SmallVector<void *, 4> OutputDecls;
5943 SmallVector<bool, 4> InputDeclsAddressOf;
5944 SmallVector<bool, 4> OutputDeclsAddressOf;
5945 SmallVector<std::string, 4> InputConstraints;
5946 SmallVector<std::string, 4> OutputConstraints;
5947 SmallVector<MCRegister, 4> ClobberRegs;
5948
5949 SmallVector<AsmRewrite, 4> AsmStrRewrites;
5950
5951 // Prime the lexer.
5952 Lex();
5953
5954 // While we have input, parse each statement.
5955 unsigned InputIdx = 0;
5956 unsigned OutputIdx = 0;
5957 while (getLexer().isNot(K: AsmToken::Eof)) {
5958 // Parse curly braces marking block start/end
5959 if (parseCurlyBlockScope(AsmStrRewrites))
5960 continue;
5961
5962 ParseStatementInfo Info(&AsmStrRewrites);
5963 bool StatementErr = parseStatement(Info, SI: &SI);
5964
5965 if (StatementErr || Info.ParseError) {
5966 // Emit pending errors if any exist.
5967 printPendingErrors();
5968 return true;
5969 }
5970
5971 // No pending error should exist here.
5972 assert(!hasPendingError() && "unexpected error from parseStatement");
5973
5974 if (Info.Opcode == ~0U)
5975 continue;
5976
5977 const MCInstrDesc &Desc = MII->get(Opcode: Info.Opcode);
5978
5979 // Build the list of clobbers, outputs and inputs.
5980 for (unsigned i = 1, e = Info.ParsedOperands.size(); i != e; ++i) {
5981 MCParsedAsmOperand &Operand = *Info.ParsedOperands[i];
5982
5983 // Register operand.
5984 if (Operand.isReg() && !Operand.needAddressOf() &&
5985 !getTargetParser().omitRegisterFromClobberLists(Reg: Operand.getReg())) {
5986 unsigned NumDefs = Desc.getNumDefs();
5987 // Clobber.
5988 if (NumDefs && Operand.getMCOperandNum() < NumDefs)
5989 ClobberRegs.push_back(Elt: Operand.getReg());
5990 continue;
5991 }
5992
5993 // Expr/Input or Output.
5994 StringRef SymName = Operand.getSymName();
5995 if (SymName.empty())
5996 continue;
5997
5998 void *OpDecl = Operand.getOpDecl();
5999 if (!OpDecl)
6000 continue;
6001
6002 StringRef Constraint = Operand.getConstraint();
6003 if (Operand.isImm()) {
6004 // Offset as immediate
6005 if (Operand.isOffsetOfLocal())
6006 Constraint = "r";
6007 else
6008 Constraint = "i";
6009 }
6010
6011 bool isOutput = (i == 1) && Desc.mayStore();
6012 bool Restricted = Operand.isMemUseUpRegs();
6013 SMLoc Start = SMLoc::getFromPointer(Ptr: SymName.data());
6014 if (isOutput) {
6015 ++InputIdx;
6016 OutputDecls.push_back(Elt: OpDecl);
6017 OutputDeclsAddressOf.push_back(Elt: Operand.needAddressOf());
6018 OutputConstraints.push_back(Elt: ("=" + Constraint).str());
6019 AsmStrRewrites.emplace_back(Args: AOK_Output, Args&: Start, Args: SymName.size(), Args: 0,
6020 Args&: Restricted);
6021 } else {
6022 InputDecls.push_back(Elt: OpDecl);
6023 InputDeclsAddressOf.push_back(Elt: Operand.needAddressOf());
6024 InputConstraints.push_back(Elt: Constraint.str());
6025 if (Desc.operands()[i - 1].isBranchTarget())
6026 AsmStrRewrites.emplace_back(Args: AOK_CallInput, Args&: Start, Args: SymName.size(), Args: 0,
6027 Args&: Restricted);
6028 else
6029 AsmStrRewrites.emplace_back(Args: AOK_Input, Args&: Start, Args: SymName.size(), Args: 0,
6030 Args&: Restricted);
6031 }
6032 }
6033
6034 // Consider implicit defs to be clobbers. Think of cpuid and push.
6035 llvm::append_range(C&: ClobberRegs, R: Desc.implicit_defs());
6036 }
6037
6038 // Set the number of Outputs and Inputs.
6039 NumOutputs = OutputDecls.size();
6040 NumInputs = InputDecls.size();
6041
6042 // Set the unique clobbers.
6043 array_pod_sort(Start: ClobberRegs.begin(), End: ClobberRegs.end());
6044 ClobberRegs.erase(CS: llvm::unique(R&: ClobberRegs), CE: ClobberRegs.end());
6045 Clobbers.assign(NumElts: ClobberRegs.size(), Elt: std::string());
6046 for (unsigned I = 0, E = ClobberRegs.size(); I != E; ++I) {
6047 raw_string_ostream OS(Clobbers[I]);
6048 IP->printRegName(OS, Reg: ClobberRegs[I]);
6049 }
6050
6051 // Merge the various outputs and inputs. Output are expected first.
6052 if (NumOutputs || NumInputs) {
6053 unsigned NumExprs = NumOutputs + NumInputs;
6054 OpDecls.resize(N: NumExprs);
6055 Constraints.resize(N: NumExprs);
6056 for (unsigned i = 0; i < NumOutputs; ++i) {
6057 OpDecls[i] = std::make_pair(x&: OutputDecls[i], y&: OutputDeclsAddressOf[i]);
6058 Constraints[i] = OutputConstraints[i];
6059 }
6060 for (unsigned i = 0, j = NumOutputs; i < NumInputs; ++i, ++j) {
6061 OpDecls[j] = std::make_pair(x&: InputDecls[i], y&: InputDeclsAddressOf[i]);
6062 Constraints[j] = InputConstraints[i];
6063 }
6064 }
6065
6066 // Build the IR assembly string.
6067 std::string AsmStringIR;
6068 raw_string_ostream OS(AsmStringIR);
6069 StringRef ASMString =
6070 SrcMgr.getMemoryBuffer(i: SrcMgr.getMainFileID())->getBuffer();
6071 const char *AsmStart = ASMString.begin();
6072 const char *AsmEnd = ASMString.end();
6073 array_pod_sort(Start: AsmStrRewrites.begin(), End: AsmStrRewrites.end(), Compare: rewritesSort);
6074 for (auto I = AsmStrRewrites.begin(), E = AsmStrRewrites.end(); I != E; ++I) {
6075 const AsmRewrite &AR = *I;
6076 // Check if this has already been covered by another rewrite...
6077 if (AR.Done)
6078 continue;
6079 AsmRewriteKind Kind = AR.Kind;
6080
6081 const char *Loc = AR.Loc.getPointer();
6082 assert(Loc >= AsmStart && "Expected Loc to be at or after Start!");
6083
6084 // Emit everything up to the immediate/expression.
6085 if (unsigned Len = Loc - AsmStart)
6086 OS << StringRef(AsmStart, Len);
6087
6088 // Skip the original expression.
6089 if (Kind == AOK_Skip) {
6090 AsmStart = Loc + AR.Len;
6091 continue;
6092 }
6093
6094 unsigned AdditionalSkip = 0;
6095 // Rewrite expressions in $N notation.
6096 switch (Kind) {
6097 default:
6098 break;
6099 case AOK_IntelExpr:
6100 assert(AR.IntelExp.isValid() && "cannot write invalid intel expression");
6101 if (AR.IntelExp.NeedBracs)
6102 OS << "[";
6103 if (AR.IntelExp.hasBaseReg())
6104 OS << AR.IntelExp.BaseReg;
6105 if (AR.IntelExp.hasIndexReg())
6106 OS << (AR.IntelExp.hasBaseReg() ? " + " : "")
6107 << AR.IntelExp.IndexReg;
6108 if (AR.IntelExp.Scale > 1)
6109 OS << " * $$" << AR.IntelExp.Scale;
6110 if (AR.IntelExp.hasOffset()) {
6111 if (AR.IntelExp.hasRegs())
6112 OS << " + ";
6113 // Fuse this rewrite with a rewrite of the offset name, if present.
6114 StringRef OffsetName = AR.IntelExp.OffsetName;
6115 SMLoc OffsetLoc = SMLoc::getFromPointer(Ptr: AR.IntelExp.OffsetName.data());
6116 size_t OffsetLen = OffsetName.size();
6117 auto rewrite_it = std::find_if(
6118 first: I, last: AsmStrRewrites.end(), pred: [&](const AsmRewrite &FusingAR) {
6119 return FusingAR.Loc == OffsetLoc && FusingAR.Len == OffsetLen &&
6120 (FusingAR.Kind == AOK_Input ||
6121 FusingAR.Kind == AOK_CallInput);
6122 });
6123 if (rewrite_it == AsmStrRewrites.end()) {
6124 OS << "offset " << OffsetName;
6125 } else if (rewrite_it->Kind == AOK_CallInput) {
6126 OS << "${" << InputIdx++ << ":P}";
6127 rewrite_it->Done = true;
6128 } else {
6129 OS << '$' << InputIdx++;
6130 rewrite_it->Done = true;
6131 }
6132 }
6133 if (AR.IntelExp.Imm || AR.IntelExp.emitImm())
6134 OS << (AR.IntelExp.emitImm() ? "$$" : " + $$") << AR.IntelExp.Imm;
6135 if (AR.IntelExp.NeedBracs)
6136 OS << "]";
6137 break;
6138 case AOK_Label:
6139 OS << Ctx.getAsmInfo()->getPrivateLabelPrefix() << AR.Label;
6140 break;
6141 case AOK_Input:
6142 if (AR.IntelExpRestricted)
6143 OS << "${" << InputIdx++ << ":P}";
6144 else
6145 OS << '$' << InputIdx++;
6146 break;
6147 case AOK_CallInput:
6148 OS << "${" << InputIdx++ << ":P}";
6149 break;
6150 case AOK_Output:
6151 if (AR.IntelExpRestricted)
6152 OS << "${" << OutputIdx++ << ":P}";
6153 else
6154 OS << '$' << OutputIdx++;
6155 break;
6156 case AOK_SizeDirective:
6157 switch (AR.Val) {
6158 default: break;
6159 case 8: OS << "byte ptr "; break;
6160 case 16: OS << "word ptr "; break;
6161 case 32: OS << "dword ptr "; break;
6162 case 64: OS << "qword ptr "; break;
6163 case 80: OS << "xword ptr "; break;
6164 case 128: OS << "xmmword ptr "; break;
6165 case 256: OS << "ymmword ptr "; break;
6166 }
6167 break;
6168 case AOK_Emit:
6169 OS << ".byte";
6170 break;
6171 case AOK_Align: {
6172 // MS alignment directives are measured in bytes. If the native assembler
6173 // measures alignment in bytes, we can pass it straight through.
6174 OS << ".align";
6175 if (getContext().getAsmInfo()->getAlignmentIsInBytes())
6176 break;
6177
6178 // Alignment is in log2 form, so print that instead and skip the original
6179 // immediate.
6180 unsigned Val = AR.Val;
6181 OS << ' ' << Val;
6182 assert(Val < 10 && "Expected alignment less then 2^10.");
6183 AdditionalSkip = (Val < 4) ? 2 : Val < 7 ? 3 : 4;
6184 break;
6185 }
6186 case AOK_EVEN:
6187 OS << ".even";
6188 break;
6189 case AOK_EndOfStatement:
6190 OS << "\n\t";
6191 break;
6192 }
6193
6194 // Skip the original expression.
6195 AsmStart = Loc + AR.Len + AdditionalSkip;
6196 }
6197
6198 // Emit the remainder of the asm string.
6199 if (AsmStart != AsmEnd)
6200 OS << StringRef(AsmStart, AsmEnd - AsmStart);
6201
6202 AsmString = std::move(AsmStringIR);
6203 return false;
6204}
6205
6206bool HLASMAsmParser::parseAsHLASMLabel(ParseStatementInfo &Info,
6207 MCAsmParserSemaCallback *SI) {
6208 AsmToken LabelTok = getTok();
6209 SMLoc LabelLoc = LabelTok.getLoc();
6210 StringRef LabelVal;
6211
6212 if (parseIdentifier(Res&: LabelVal))
6213 return Error(L: LabelLoc, Msg: "The HLASM Label has to be an Identifier");
6214
6215 // We have validated whether the token is an Identifier.
6216 // Now we have to validate whether the token is a
6217 // valid HLASM Label.
6218 if (!getTargetParser().isLabel(Token&: LabelTok) || checkForValidSection())
6219 return true;
6220
6221 // Lex leading spaces to get to the next operand.
6222 lexLeadingSpaces();
6223
6224 // We shouldn't emit the label if there is nothing else after the label.
6225 // i.e asm("<token>\n")
6226 if (getTok().is(K: AsmToken::EndOfStatement))
6227 return Error(L: LabelLoc,
6228 Msg: "Cannot have just a label for an HLASM inline asm statement");
6229
6230 MCSymbol *Sym = getContext().getOrCreateSymbol(
6231 Name: getContext().getAsmInfo()->isHLASM() ? LabelVal.upper() : LabelVal);
6232
6233 // Emit the label.
6234 Out.emitLabel(Symbol: Sym, Loc: LabelLoc);
6235
6236 // If we are generating dwarf for assembly source files then gather the
6237 // info to make a dwarf label entry for this label if needed.
6238 if (enabledGenDwarfForAssembly())
6239 MCGenDwarfLabelEntry::Make(Symbol: Sym, MCOS: &getStreamer(), SrcMgr&: getSourceManager(),
6240 Loc&: LabelLoc);
6241
6242 return false;
6243}
6244
6245bool HLASMAsmParser::parseAsMachineInstruction(ParseStatementInfo &Info,
6246 MCAsmParserSemaCallback *SI) {
6247 AsmToken OperationEntryTok = Lexer.getTok();
6248 SMLoc OperationEntryLoc = OperationEntryTok.getLoc();
6249 StringRef OperationEntryVal;
6250
6251 // Attempt to parse the first token as an Identifier
6252 if (parseIdentifier(Res&: OperationEntryVal))
6253 return Error(L: OperationEntryLoc, Msg: "unexpected token at start of statement");
6254
6255 // Once we've parsed the operation entry successfully, lex
6256 // any spaces to get to the OperandEntries.
6257 lexLeadingSpaces();
6258
6259 return parseAndMatchAndEmitTargetInstruction(
6260 Info, IDVal: OperationEntryVal, ID: OperationEntryTok, IDLoc: OperationEntryLoc);
6261}
6262
6263bool HLASMAsmParser::parseStatement(ParseStatementInfo &Info,
6264 MCAsmParserSemaCallback *SI) {
6265 assert(!hasPendingError() && "parseStatement started with pending error");
6266
6267 // Should the first token be interpreted as a HLASM Label.
6268 bool ShouldParseAsHLASMLabel = false;
6269
6270 // If a Name Entry exists, it should occur at the very
6271 // start of the string. In this case, we should parse the
6272 // first non-space token as a Label.
6273 // If the Name entry is missing (i.e. there's some other
6274 // token), then we attempt to parse the first non-space
6275 // token as a Machine Instruction.
6276 if (getTok().isNot(K: AsmToken::Space))
6277 ShouldParseAsHLASMLabel = true;
6278
6279 // If we have an EndOfStatement (which includes the target's comment
6280 // string) we can appropriately lex it early on)
6281 if (Lexer.is(K: AsmToken::EndOfStatement)) {
6282 // if this is a line comment we can drop it safely
6283 if (getTok().getString().empty() || getTok().getString().front() == '\r' ||
6284 getTok().getString().front() == '\n')
6285 Out.addBlankLine();
6286 Lex();
6287 return false;
6288 }
6289
6290 // We have established how to parse the inline asm statement.
6291 // Now we can safely lex any leading spaces to get to the
6292 // first token.
6293 lexLeadingSpaces();
6294
6295 // If we see a new line or carriage return as the first operand,
6296 // after lexing leading spaces, emit the new line and lex the
6297 // EndOfStatement token.
6298 if (Lexer.is(K: AsmToken::EndOfStatement)) {
6299 if (getTok().getString().front() == '\n' ||
6300 getTok().getString().front() == '\r') {
6301 Out.addBlankLine();
6302 Lex();
6303 return false;
6304 }
6305 }
6306
6307 // Handle the label first if we have to before processing the rest
6308 // of the tokens as a machine instruction.
6309 if (ShouldParseAsHLASMLabel) {
6310 // If there were any errors while handling and emitting the label,
6311 // early return.
6312 if (parseAsHLASMLabel(Info, SI)) {
6313 // If we know we've failed in parsing, simply eat until end of the
6314 // statement. This ensures that we don't process any other statements.
6315 eatToEndOfStatement();
6316 return true;
6317 }
6318 }
6319
6320 return parseAsMachineInstruction(Info, SI);
6321}
6322
6323namespace llvm {
6324namespace MCParserUtils {
6325
6326bool parseAssignmentExpression(StringRef Name, bool allow_redef,
6327 MCAsmParser &Parser, MCSymbol *&Sym,
6328 const MCExpr *&Value) {
6329
6330 // FIXME: Use better location, we should use proper tokens.
6331 SMLoc EqualLoc = Parser.getTok().getLoc();
6332 if (Parser.parseExpression(Res&: Value))
6333 return Parser.TokError(Msg: "missing expression");
6334 if (Parser.parseEOL())
6335 return true;
6336 // Relocation specifiers are not permitted. For now, handle just
6337 // MCSymbolRefExpr.
6338 if (auto *S = dyn_cast<MCSymbolRefExpr>(Val: Value); S && S->getSpecifier())
6339 return Parser.Error(
6340 L: EqualLoc, Msg: "relocation specifier not permitted in symbol equating");
6341
6342 // Validate that the LHS is allowed to be a variable (either it has not been
6343 // used as a symbol, or it is an absolute symbol).
6344 Sym = Parser.getContext().lookupSymbol(Name);
6345 if (Sym) {
6346 if (!Sym->isUnset() && (!allow_redef || !Sym->isRedefinable()))
6347 return Parser.Error(L: EqualLoc, Msg: "redefinition of '" + Name + "'");
6348 // If the symbol is redefinable, clone it and update the symbol table
6349 // to the new symbol. Existing references to the original symbol remain
6350 // unchanged.
6351 if (Sym->isRedefinable())
6352 Sym = Parser.getContext().cloneSymbol(Sym&: *Sym);
6353 } else if (Name == ".") {
6354 Parser.getStreamer().emitValueToOffset(Offset: Value, Value: 0, Loc: EqualLoc);
6355 return false;
6356 } else
6357 Sym = Parser.getContext().getOrCreateSymbol(Name);
6358
6359 Sym->setRedefinable(allow_redef);
6360
6361 return false;
6362}
6363
6364} // end namespace MCParserUtils
6365} // end namespace llvm
6366
6367/// Create an MCAsmParser instance.
6368MCAsmParser *llvm::createMCAsmParser(SourceMgr &SM, MCContext &C,
6369 MCStreamer &Out, const MCAsmInfo &MAI,
6370 unsigned CB) {
6371 if (C.getTargetTriple().isSystemZ() && C.getTargetTriple().isOSzOS())
6372 return new HLASMAsmParser(SM, C, Out, MAI, CB);
6373
6374 return new AsmParser(SM, C, Out, MAI, CB);
6375}
6376