Bug Summary

File:llvm/lib/MC/MCParser/AsmParser.cpp
Warning:line 5863, column 3
2nd function call argument is an uninitialized value

Annotated Source Code

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clang -cc1 -cc1 -triple x86_64-pc-linux-gnu -analyze -disable-free -disable-llvm-verifier -discard-value-names -main-file-name AsmParser.cpp -analyzer-store=region -analyzer-opt-analyze-nested-blocks -analyzer-checker=core -analyzer-checker=apiModeling -analyzer-checker=unix -analyzer-checker=deadcode -analyzer-checker=cplusplus -analyzer-checker=security.insecureAPI.UncheckedReturn -analyzer-checker=security.insecureAPI.getpw -analyzer-checker=security.insecureAPI.gets -analyzer-checker=security.insecureAPI.mktemp -analyzer-checker=security.insecureAPI.mkstemp -analyzer-checker=security.insecureAPI.vfork -analyzer-checker=nullability.NullPassedToNonnull -analyzer-checker=nullability.NullReturnedFromNonnull -analyzer-output plist -w -setup-static-analyzer -analyzer-config-compatibility-mode=true -mrelocation-model pic -pic-level 2 -mframe-pointer=none -fmath-errno -fno-rounding-math -mconstructor-aliases -munwind-tables -target-cpu x86-64 -tune-cpu generic -debugger-tuning=gdb -ffunction-sections -fdata-sections -fcoverage-compilation-dir=/build/llvm-toolchain-snapshot-13~++20210613111130+5be314f79ba7/build-llvm/lib/MC/MCParser -resource-dir /usr/lib/llvm-13/lib/clang/13.0.0 -D _DEBUG -D _GNU_SOURCE -D __STDC_CONSTANT_MACROS -D __STDC_FORMAT_MACROS -D __STDC_LIMIT_MACROS -I /build/llvm-toolchain-snapshot-13~++20210613111130+5be314f79ba7/build-llvm/lib/MC/MCParser -I /build/llvm-toolchain-snapshot-13~++20210613111130+5be314f79ba7/llvm/lib/MC/MCParser -I /build/llvm-toolchain-snapshot-13~++20210613111130+5be314f79ba7/build-llvm/include -I /build/llvm-toolchain-snapshot-13~++20210613111130+5be314f79ba7/llvm/include -D NDEBUG -U NDEBUG -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/10/../../../../include/x86_64-linux-gnu/c++/10 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10/backward -internal-isystem /usr/lib/llvm-13/lib/clang/13.0.0/include -internal-isystem /usr/local/include -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/10/../../../../x86_64-linux-gnu/include -internal-externc-isystem /usr/include/x86_64-linux-gnu -internal-externc-isystem /include -internal-externc-isystem /usr/include -O2 -Wno-unused-parameter -Wwrite-strings -Wno-missing-field-initializers -Wno-long-long -Wno-maybe-uninitialized -Wno-class-memaccess -Wno-redundant-move -Wno-pessimizing-move -Wno-noexcept-type -Wno-comment -std=c++14 -fdeprecated-macro -fdebug-compilation-dir=/build/llvm-toolchain-snapshot-13~++20210613111130+5be314f79ba7/build-llvm/lib/MC/MCParser -fdebug-prefix-map=/build/llvm-toolchain-snapshot-13~++20210613111130+5be314f79ba7=. -ferror-limit 19 -fvisibility-inlines-hidden -stack-protector 2 -fgnuc-version=4.2.1 -vectorize-loops -vectorize-slp -analyzer-output=html -analyzer-config stable-report-filename=true -faddrsig -D__GCC_HAVE_DWARF2_CFI_ASM=1 -o /tmp/scan-build-2021-06-13-111025-38230-1 -x c++ /build/llvm-toolchain-snapshot-13~++20210613111130+5be314f79ba7/llvm/lib/MC/MCParser/AsmParser.cpp

/build/llvm-toolchain-snapshot-13~++20210613111130+5be314f79ba7/llvm/lib/MC/MCParser/AsmParser.cpp

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/None.h"
17#include "llvm/ADT/STLExtras.h"
18#include "llvm/ADT/SmallSet.h"
19#include "llvm/ADT/SmallString.h"
20#include "llvm/ADT/SmallVector.h"
21#include "llvm/ADT/StringExtras.h"
22#include "llvm/ADT/StringMap.h"
23#include "llvm/ADT/StringRef.h"
24#include "llvm/ADT/Twine.h"
25#include "llvm/BinaryFormat/Dwarf.h"
26#include "llvm/DebugInfo/CodeView/SymbolRecord.h"
27#include "llvm/MC/MCAsmInfo.h"
28#include "llvm/MC/MCCodeView.h"
29#include "llvm/MC/MCContext.h"
30#include "llvm/MC/MCDirectives.h"
31#include "llvm/MC/MCDwarf.h"
32#include "llvm/MC/MCExpr.h"
33#include "llvm/MC/MCInstPrinter.h"
34#include "llvm/MC/MCInstrDesc.h"
35#include "llvm/MC/MCInstrInfo.h"
36#include "llvm/MC/MCObjectFileInfo.h"
37#include "llvm/MC/MCParser/AsmCond.h"
38#include "llvm/MC/MCParser/AsmLexer.h"
39#include "llvm/MC/MCParser/MCAsmLexer.h"
40#include "llvm/MC/MCParser/MCAsmParser.h"
41#include "llvm/MC/MCParser/MCAsmParserExtension.h"
42#include "llvm/MC/MCParser/MCAsmParserUtils.h"
43#include "llvm/MC/MCParser/MCParsedAsmOperand.h"
44#include "llvm/MC/MCParser/MCTargetAsmParser.h"
45#include "llvm/MC/MCRegisterInfo.h"
46#include "llvm/MC/MCSection.h"
47#include "llvm/MC/MCStreamer.h"
48#include "llvm/MC/MCSymbol.h"
49#include "llvm/MC/MCTargetOptions.h"
50#include "llvm/MC/MCValue.h"
51#include "llvm/Support/Casting.h"
52#include "llvm/Support/CommandLine.h"
53#include "llvm/Support/ErrorHandling.h"
54#include "llvm/Support/MD5.h"
55#include "llvm/Support/MathExtras.h"
56#include "llvm/Support/MemoryBuffer.h"
57#include "llvm/Support/SMLoc.h"
58#include "llvm/Support/SourceMgr.h"
59#include "llvm/Support/raw_ostream.h"
60#include <algorithm>
61#include <cassert>
62#include <cctype>
63#include <climits>
64#include <cstddef>
65#include <cstdint>
66#include <deque>
67#include <memory>
68#include <sstream>
69#include <string>
70#include <tuple>
71#include <utility>
72#include <vector>
73
74using namespace llvm;
75
76MCAsmParserSemaCallback::~MCAsmParserSemaCallback() = default;
77
78extern cl::opt<unsigned> AsmMacroMaxNestingDepth;
79
80namespace {
81
82/// Helper types for tracking macro definitions.
83typedef std::vector<AsmToken> MCAsmMacroArgument;
84typedef std::vector<MCAsmMacroArgument> MCAsmMacroArguments;
85
86/// Helper class for storing information about an active macro
87/// instantiation.
88struct MacroInstantiation {
89 /// The location of the instantiation.
90 SMLoc InstantiationLoc;
91
92 /// The buffer where parsing should resume upon instantiation completion.
93 unsigned ExitBuffer;
94
95 /// The location where parsing should resume upon instantiation completion.
96 SMLoc ExitLoc;
97
98 /// The depth of TheCondStack at the start of the instantiation.
99 size_t CondStackDepth;
100};
101
102struct ParseStatementInfo {
103 /// The parsed operands from the last parsed statement.
104 SmallVector<std::unique_ptr<MCParsedAsmOperand>, 8> ParsedOperands;
105
106 /// The opcode from the last parsed instruction.
107 unsigned Opcode = ~0U;
108
109 /// Was there an error parsing the inline assembly?
110 bool ParseError = false;
111
112 SmallVectorImpl<AsmRewrite> *AsmRewrites = nullptr;
113
114 ParseStatementInfo() = delete;
115 ParseStatementInfo(SmallVectorImpl<AsmRewrite> *rewrites)
116 : AsmRewrites(rewrites) {}
117};
118
119/// The concrete assembly parser instance.
120class AsmParser : public MCAsmParser {
121private:
122 AsmLexer Lexer;
123 MCContext &Ctx;
124 MCStreamer &Out;
125 const MCAsmInfo &MAI;
126 SourceMgr &SrcMgr;
127 SourceMgr::DiagHandlerTy SavedDiagHandler;
128 void *SavedDiagContext;
129 std::unique_ptr<MCAsmParserExtension> PlatformParser;
130 SMLoc StartTokLoc;
131
132 /// This is the current buffer index we're lexing from as managed by the
133 /// SourceMgr object.
134 unsigned CurBuffer;
135
136 AsmCond TheCondState;
137 std::vector<AsmCond> TheCondStack;
138
139 /// maps directive names to handler methods in parser
140 /// extensions. Extensions register themselves in this map by calling
141 /// addDirectiveHandler.
142 StringMap<ExtensionDirectiveHandler> ExtensionDirectiveMap;
143
144 /// Stack of active macro instantiations.
145 std::vector<MacroInstantiation*> ActiveMacros;
146
147 /// List of bodies of anonymous macros.
148 std::deque<MCAsmMacro> MacroLikeBodies;
149
150 /// Boolean tracking whether macro substitution is enabled.
151 unsigned MacrosEnabledFlag : 1;
152
153 /// Keeps track of how many .macro's have been instantiated.
154 unsigned NumOfMacroInstantiations;
155
156 /// The values from the last parsed cpp hash file line comment if any.
157 struct CppHashInfoTy {
158 StringRef Filename;
159 int64_t LineNumber;
160 SMLoc Loc;
161 unsigned Buf;
162 CppHashInfoTy() : Filename(), LineNumber(0), Loc(), Buf(0) {}
163 };
164 CppHashInfoTy CppHashInfo;
165
166 /// The filename from the first cpp hash file line comment, if any.
167 StringRef FirstCppHashFilename;
168
169 /// List of forward directional labels for diagnosis at the end.
170 SmallVector<std::tuple<SMLoc, CppHashInfoTy, MCSymbol *>, 4> DirLabels;
171
172 SmallSet<StringRef, 2> LTODiscardSymbols;
173
174 /// AssemblerDialect. ~OU means unset value and use value provided by MAI.
175 unsigned AssemblerDialect = ~0U;
176
177 /// is Darwin compatibility enabled?
178 bool IsDarwin = false;
179
180 /// Are we parsing ms-style inline assembly?
181 bool ParsingMSInlineAsm = false;
182
183 /// Did we already inform the user about inconsistent MD5 usage?
184 bool ReportedInconsistentMD5 = false;
185
186 // Is alt macro mode enabled.
187 bool AltMacroMode = false;
188
189protected:
190 virtual bool parseStatement(ParseStatementInfo &Info,
191 MCAsmParserSemaCallback *SI);
192
193 /// This routine uses the target specific ParseInstruction function to
194 /// parse an instruction into Operands, and then call the target specific
195 /// MatchAndEmit function to match and emit the instruction.
196 bool parseAndMatchAndEmitTargetInstruction(ParseStatementInfo &Info,
197 StringRef IDVal, AsmToken ID,
198 SMLoc IDLoc);
199
200 /// Should we emit DWARF describing this assembler source? (Returns false if
201 /// the source has .file directives, which means we don't want to generate
202 /// info describing the assembler source itself.)
203 bool enabledGenDwarfForAssembly();
204
205public:
206 AsmParser(SourceMgr &SM, MCContext &Ctx, MCStreamer &Out,
207 const MCAsmInfo &MAI, unsigned CB);
208 AsmParser(const AsmParser &) = delete;
209 AsmParser &operator=(const AsmParser &) = delete;
210 ~AsmParser() override;
211
212 bool Run(bool NoInitialTextSection, bool NoFinalize = false) override;
213
214 void addDirectiveHandler(StringRef Directive,
215 ExtensionDirectiveHandler Handler) override {
216 ExtensionDirectiveMap[Directive] = Handler;
217 }
218
219 void addAliasForDirective(StringRef Directive, StringRef Alias) override {
220 DirectiveKindMap[Directive.lower()] = DirectiveKindMap[Alias.lower()];
221 }
222
223 /// @name MCAsmParser Interface
224 /// {
225
226 SourceMgr &getSourceManager() override { return SrcMgr; }
227 MCAsmLexer &getLexer() override { return Lexer; }
228 MCContext &getContext() override { return Ctx; }
229 MCStreamer &getStreamer() override { return Out; }
230
231 CodeViewContext &getCVContext() { return Ctx.getCVContext(); }
232
233 unsigned getAssemblerDialect() override {
234 if (AssemblerDialect == ~0U)
235 return MAI.getAssemblerDialect();
236 else
237 return AssemblerDialect;
238 }
239 void setAssemblerDialect(unsigned i) override {
240 AssemblerDialect = i;
241 }
242
243 void Note(SMLoc L, const Twine &Msg, SMRange Range = None) override;
244 bool Warning(SMLoc L, const Twine &Msg, SMRange Range = None) override;
245 bool printError(SMLoc L, const Twine &Msg, SMRange Range = None) override;
246
247 const AsmToken &Lex() override;
248
249 void setParsingMSInlineAsm(bool V) override {
250 ParsingMSInlineAsm = V;
251 // When parsing MS inline asm, we must lex 0b1101 and 0ABCH as binary and
252 // hex integer literals.
253 Lexer.setLexMasmIntegers(V);
254 }
255 bool isParsingMSInlineAsm() override { return ParsingMSInlineAsm; }
256
257 bool discardLTOSymbol(StringRef Name) const override {
258 return LTODiscardSymbols.contains(Name);
259 }
260
261 bool parseMSInlineAsm(void *AsmLoc, std::string &AsmString,
262 unsigned &NumOutputs, unsigned &NumInputs,
263 SmallVectorImpl<std::pair<void *,bool>> &OpDecls,
264 SmallVectorImpl<std::string> &Constraints,
265 SmallVectorImpl<std::string> &Clobbers,
266 const MCInstrInfo *MII, const MCInstPrinter *IP,
267 MCAsmParserSemaCallback &SI) override;
268
269 bool parseExpression(const MCExpr *&Res);
270 bool parseExpression(const MCExpr *&Res, SMLoc &EndLoc) override;
271 bool parsePrimaryExpr(const MCExpr *&Res, SMLoc &EndLoc,
272 AsmTypeInfo *TypeInfo) override;
273 bool parseParenExpression(const MCExpr *&Res, SMLoc &EndLoc) override;
274 bool parseParenExprOfDepth(unsigned ParenDepth, const MCExpr *&Res,
275 SMLoc &EndLoc) override;
276 bool parseAbsoluteExpression(int64_t &Res) override;
277
278 /// Parse a floating point expression using the float \p Semantics
279 /// and set \p Res to the value.
280 bool parseRealValue(const fltSemantics &Semantics, APInt &Res);
281
282 /// Parse an identifier or string (as a quoted identifier)
283 /// and set \p Res to the identifier contents.
284 bool parseIdentifier(StringRef &Res) override;
285 void eatToEndOfStatement() override;
286
287 bool checkForValidSection() override;
288
289 /// }
290
291private:
292 bool parseCurlyBlockScope(SmallVectorImpl<AsmRewrite>& AsmStrRewrites);
293 bool parseCppHashLineFilenameComment(SMLoc L, bool SaveLocInfo = true);
294
295 void checkForBadMacro(SMLoc DirectiveLoc, StringRef Name, StringRef Body,
296 ArrayRef<MCAsmMacroParameter> Parameters);
297 bool expandMacro(raw_svector_ostream &OS, StringRef Body,
298 ArrayRef<MCAsmMacroParameter> Parameters,
299 ArrayRef<MCAsmMacroArgument> A, bool EnableAtPseudoVariable,
300 SMLoc L);
301
302 /// Are macros enabled in the parser?
303 bool areMacrosEnabled() {return MacrosEnabledFlag;}
304
305 /// Control a flag in the parser that enables or disables macros.
306 void setMacrosEnabled(bool Flag) {MacrosEnabledFlag = Flag;}
307
308 /// Are we inside a macro instantiation?
309 bool isInsideMacroInstantiation() {return !ActiveMacros.empty();}
310
311 /// Handle entry to macro instantiation.
312 ///
313 /// \param M The macro.
314 /// \param NameLoc Instantiation location.
315 bool handleMacroEntry(const MCAsmMacro *M, SMLoc NameLoc);
316
317 /// Handle exit from macro instantiation.
318 void handleMacroExit();
319
320 /// Extract AsmTokens for a macro argument.
321 bool parseMacroArgument(MCAsmMacroArgument &MA, bool Vararg);
322
323 /// Parse all macro arguments for a given macro.
324 bool parseMacroArguments(const MCAsmMacro *M, MCAsmMacroArguments &A);
325
326 void printMacroInstantiations();
327 void printMessage(SMLoc Loc, SourceMgr::DiagKind Kind, const Twine &Msg,
328 SMRange Range = None) const {
329 ArrayRef<SMRange> Ranges(Range);
330 SrcMgr.PrintMessage(Loc, Kind, Msg, Ranges);
331 }
332 static void DiagHandler(const SMDiagnostic &Diag, void *Context);
333
334 /// Enter the specified file. This returns true on failure.
335 bool enterIncludeFile(const std::string &Filename);
336
337 /// Process the specified file for the .incbin directive.
338 /// This returns true on failure.
339 bool processIncbinFile(const std::string &Filename, int64_t Skip = 0,
340 const MCExpr *Count = nullptr, SMLoc Loc = SMLoc());
341
342 /// Reset the current lexer position to that given by \p Loc. The
343 /// current token is not set; clients should ensure Lex() is called
344 /// subsequently.
345 ///
346 /// \param InBuffer If not 0, should be the known buffer id that contains the
347 /// location.
348 void jumpToLoc(SMLoc Loc, unsigned InBuffer = 0);
349
350 /// Parse up to the end of statement and a return the contents from the
351 /// current token until the end of the statement; the current token on exit
352 /// will be either the EndOfStatement or EOF.
353 StringRef parseStringToEndOfStatement() override;
354
355 /// Parse until the end of a statement or a comma is encountered,
356 /// return the contents from the current token up to the end or comma.
357 StringRef parseStringToComma();
358
359 bool parseAssignment(StringRef Name, bool allow_redef,
360 bool NoDeadStrip = false);
361
362 unsigned getBinOpPrecedence(AsmToken::TokenKind K,
363 MCBinaryExpr::Opcode &Kind);
364
365 bool parseBinOpRHS(unsigned Precedence, const MCExpr *&Res, SMLoc &EndLoc);
366 bool parseParenExpr(const MCExpr *&Res, SMLoc &EndLoc);
367 bool parseBracketExpr(const MCExpr *&Res, SMLoc &EndLoc);
368
369 bool parseRegisterOrRegisterNumber(int64_t &Register, SMLoc DirectiveLoc);
370
371 bool parseCVFunctionId(int64_t &FunctionId, StringRef DirectiveName);
372 bool parseCVFileId(int64_t &FileId, StringRef DirectiveName);
373
374 // Generic (target and platform independent) directive parsing.
375 enum DirectiveKind {
376 DK_NO_DIRECTIVE, // Placeholder
377 DK_SET,
378 DK_EQU,
379 DK_EQUIV,
380 DK_ASCII,
381 DK_ASCIZ,
382 DK_STRING,
383 DK_BYTE,
384 DK_SHORT,
385 DK_RELOC,
386 DK_VALUE,
387 DK_2BYTE,
388 DK_LONG,
389 DK_INT,
390 DK_4BYTE,
391 DK_QUAD,
392 DK_8BYTE,
393 DK_OCTA,
394 DK_DC,
395 DK_DC_A,
396 DK_DC_B,
397 DK_DC_D,
398 DK_DC_L,
399 DK_DC_S,
400 DK_DC_W,
401 DK_DC_X,
402 DK_DCB,
403 DK_DCB_B,
404 DK_DCB_D,
405 DK_DCB_L,
406 DK_DCB_S,
407 DK_DCB_W,
408 DK_DCB_X,
409 DK_DS,
410 DK_DS_B,
411 DK_DS_D,
412 DK_DS_L,
413 DK_DS_P,
414 DK_DS_S,
415 DK_DS_W,
416 DK_DS_X,
417 DK_SINGLE,
418 DK_FLOAT,
419 DK_DOUBLE,
420 DK_ALIGN,
421 DK_ALIGN32,
422 DK_BALIGN,
423 DK_BALIGNW,
424 DK_BALIGNL,
425 DK_P2ALIGN,
426 DK_P2ALIGNW,
427 DK_P2ALIGNL,
428 DK_ORG,
429 DK_FILL,
430 DK_ENDR,
431 DK_BUNDLE_ALIGN_MODE,
432 DK_BUNDLE_LOCK,
433 DK_BUNDLE_UNLOCK,
434 DK_ZERO,
435 DK_EXTERN,
436 DK_GLOBL,
437 DK_GLOBAL,
438 DK_LAZY_REFERENCE,
439 DK_NO_DEAD_STRIP,
440 DK_SYMBOL_RESOLVER,
441 DK_PRIVATE_EXTERN,
442 DK_REFERENCE,
443 DK_WEAK_DEFINITION,
444 DK_WEAK_REFERENCE,
445 DK_WEAK_DEF_CAN_BE_HIDDEN,
446 DK_COLD,
447 DK_COMM,
448 DK_COMMON,
449 DK_LCOMM,
450 DK_ABORT,
451 DK_INCLUDE,
452 DK_INCBIN,
453 DK_CODE16,
454 DK_CODE16GCC,
455 DK_REPT,
456 DK_IRP,
457 DK_IRPC,
458 DK_IF,
459 DK_IFEQ,
460 DK_IFGE,
461 DK_IFGT,
462 DK_IFLE,
463 DK_IFLT,
464 DK_IFNE,
465 DK_IFB,
466 DK_IFNB,
467 DK_IFC,
468 DK_IFEQS,
469 DK_IFNC,
470 DK_IFNES,
471 DK_IFDEF,
472 DK_IFNDEF,
473 DK_IFNOTDEF,
474 DK_ELSEIF,
475 DK_ELSE,
476 DK_ENDIF,
477 DK_SPACE,
478 DK_SKIP,
479 DK_FILE,
480 DK_LINE,
481 DK_LOC,
482 DK_STABS,
483 DK_CV_FILE,
484 DK_CV_FUNC_ID,
485 DK_CV_INLINE_SITE_ID,
486 DK_CV_LOC,
487 DK_CV_LINETABLE,
488 DK_CV_INLINE_LINETABLE,
489 DK_CV_DEF_RANGE,
490 DK_CV_STRINGTABLE,
491 DK_CV_STRING,
492 DK_CV_FILECHECKSUMS,
493 DK_CV_FILECHECKSUM_OFFSET,
494 DK_CV_FPO_DATA,
495 DK_CFI_SECTIONS,
496 DK_CFI_STARTPROC,
497 DK_CFI_ENDPROC,
498 DK_CFI_DEF_CFA,
499 DK_CFI_DEF_CFA_OFFSET,
500 DK_CFI_ADJUST_CFA_OFFSET,
501 DK_CFI_DEF_CFA_REGISTER,
502 DK_CFI_OFFSET,
503 DK_CFI_REL_OFFSET,
504 DK_CFI_PERSONALITY,
505 DK_CFI_LSDA,
506 DK_CFI_REMEMBER_STATE,
507 DK_CFI_RESTORE_STATE,
508 DK_CFI_SAME_VALUE,
509 DK_CFI_RESTORE,
510 DK_CFI_ESCAPE,
511 DK_CFI_RETURN_COLUMN,
512 DK_CFI_SIGNAL_FRAME,
513 DK_CFI_UNDEFINED,
514 DK_CFI_REGISTER,
515 DK_CFI_WINDOW_SAVE,
516 DK_CFI_B_KEY_FRAME,
517 DK_MACROS_ON,
518 DK_MACROS_OFF,
519 DK_ALTMACRO,
520 DK_NOALTMACRO,
521 DK_MACRO,
522 DK_EXITM,
523 DK_ENDM,
524 DK_ENDMACRO,
525 DK_PURGEM,
526 DK_SLEB128,
527 DK_ULEB128,
528 DK_ERR,
529 DK_ERROR,
530 DK_WARNING,
531 DK_PRINT,
532 DK_ADDRSIG,
533 DK_ADDRSIG_SYM,
534 DK_PSEUDO_PROBE,
535 DK_LTO_DISCARD,
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"
567 bool parseDirectiveSet(StringRef IDVal, bool allow_redef);
568 bool parseDirectiveOrg(); // ".org"
569 // ".align{,32}", ".p2align{,w,l}"
570 bool parseDirectiveAlign(bool IsPow2, unsigned ValueSize);
571
572 // ".file", ".line", ".loc", ".stabs"
573 bool parseDirectiveFile(SMLoc DirectiveLoc);
574 bool parseDirectiveLine();
575 bool parseDirectiveLoc();
576 bool parseDirectiveStabs();
577
578 // ".cv_file", ".cv_func_id", ".cv_inline_site_id", ".cv_loc", ".cv_linetable",
579 // ".cv_inline_linetable", ".cv_def_range", ".cv_string"
580 bool parseDirectiveCVFile();
581 bool parseDirectiveCVFuncId();
582 bool parseDirectiveCVInlineSiteId();
583 bool parseDirectiveCVLoc();
584 bool parseDirectiveCVLinetable();
585 bool parseDirectiveCVInlineLinetable();
586 bool parseDirectiveCVDefRange();
587 bool parseDirectiveCVString();
588 bool parseDirectiveCVStringTable();
589 bool parseDirectiveCVFileChecksums();
590 bool parseDirectiveCVFileChecksumOffset();
591 bool parseDirectiveCVFPOData();
592
593 // .cfi directives
594 bool parseDirectiveCFIRegister(SMLoc DirectiveLoc);
595 bool parseDirectiveCFIWindowSave();
596 bool parseDirectiveCFISections();
597 bool parseDirectiveCFIStartProc();
598 bool parseDirectiveCFIEndProc();
599 bool parseDirectiveCFIDefCfaOffset();
600 bool parseDirectiveCFIDefCfa(SMLoc DirectiveLoc);
601 bool parseDirectiveCFIAdjustCfaOffset();
602 bool parseDirectiveCFIDefCfaRegister(SMLoc DirectiveLoc);
603 bool parseDirectiveCFIOffset(SMLoc DirectiveLoc);
604 bool parseDirectiveCFIRelOffset(SMLoc DirectiveLoc);
605 bool parseDirectiveCFIPersonalityOrLsda(bool IsPersonality);
606 bool parseDirectiveCFIRememberState();
607 bool parseDirectiveCFIRestoreState();
608 bool parseDirectiveCFISameValue(SMLoc DirectiveLoc);
609 bool parseDirectiveCFIRestore(SMLoc DirectiveLoc);
610 bool parseDirectiveCFIEscape();
611 bool parseDirectiveCFIReturnColumn(SMLoc DirectiveLoc);
612 bool parseDirectiveCFISignalFrame();
613 bool parseDirectiveCFIUndefined(SMLoc DirectiveLoc);
614
615 // macro directives
616 bool parseDirectivePurgeMacro(SMLoc DirectiveLoc);
617 bool parseDirectiveExitMacro(StringRef Directive);
618 bool parseDirectiveEndMacro(StringRef Directive);
619 bool parseDirectiveMacro(SMLoc DirectiveLoc);
620 bool parseDirectiveMacrosOnOff(StringRef Directive);
621 // alternate macro mode directives
622 bool parseDirectiveAltmacro(StringRef Directive);
623 // ".bundle_align_mode"
624 bool parseDirectiveBundleAlignMode();
625 // ".bundle_lock"
626 bool parseDirectiveBundleLock();
627 // ".bundle_unlock"
628 bool parseDirectiveBundleUnlock();
629
630 // ".space", ".skip"
631 bool parseDirectiveSpace(StringRef IDVal);
632
633 // ".dcb"
634 bool parseDirectiveDCB(StringRef IDVal, unsigned Size);
635 bool parseDirectiveRealDCB(StringRef IDVal, const fltSemantics &);
636 // ".ds"
637 bool parseDirectiveDS(StringRef IDVal, unsigned Size);
638
639 // .sleb128 (Signed=true) and .uleb128 (Signed=false)
640 bool parseDirectiveLEB128(bool Signed);
641
642 /// Parse a directive like ".globl" which
643 /// accepts a single symbol (which should be a label or an external).
644 bool parseDirectiveSymbolAttribute(MCSymbolAttr Attr);
645
646 bool parseDirectiveComm(bool IsLocal); // ".comm" and ".lcomm"
647
648 bool parseDirectiveAbort(); // ".abort"
649 bool parseDirectiveInclude(); // ".include"
650 bool parseDirectiveIncbin(); // ".incbin"
651
652 // ".if", ".ifeq", ".ifge", ".ifgt" , ".ifle", ".iflt" or ".ifne"
653 bool parseDirectiveIf(SMLoc DirectiveLoc, DirectiveKind DirKind);
654 // ".ifb" or ".ifnb", depending on ExpectBlank.
655 bool parseDirectiveIfb(SMLoc DirectiveLoc, bool ExpectBlank);
656 // ".ifc" or ".ifnc", depending on ExpectEqual.
657 bool parseDirectiveIfc(SMLoc DirectiveLoc, bool ExpectEqual);
658 // ".ifeqs" or ".ifnes", depending on ExpectEqual.
659 bool parseDirectiveIfeqs(SMLoc DirectiveLoc, bool ExpectEqual);
660 // ".ifdef" or ".ifndef", depending on expect_defined
661 bool parseDirectiveIfdef(SMLoc DirectiveLoc, bool expect_defined);
662 bool parseDirectiveElseIf(SMLoc DirectiveLoc); // ".elseif"
663 bool parseDirectiveElse(SMLoc DirectiveLoc); // ".else"
664 bool parseDirectiveEndIf(SMLoc DirectiveLoc); // .endif
665 bool parseEscapedString(std::string &Data) override;
666 bool parseAngleBracketString(std::string &Data) override;
667
668 const MCExpr *applyModifierToExpr(const MCExpr *E,
669 MCSymbolRefExpr::VariantKind Variant);
670
671 // Macro-like directives
672 MCAsmMacro *parseMacroLikeBody(SMLoc DirectiveLoc);
673 void instantiateMacroLikeBody(MCAsmMacro *M, SMLoc DirectiveLoc,
674 raw_svector_ostream &OS);
675 bool parseDirectiveRept(SMLoc DirectiveLoc, StringRef Directive);
676 bool parseDirectiveIrp(SMLoc DirectiveLoc); // ".irp"
677 bool parseDirectiveIrpc(SMLoc DirectiveLoc); // ".irpc"
678 bool parseDirectiveEndr(SMLoc DirectiveLoc); // ".endr"
679
680 // "_emit" or "__emit"
681 bool parseDirectiveMSEmit(SMLoc DirectiveLoc, ParseStatementInfo &Info,
682 size_t Len);
683
684 // "align"
685 bool parseDirectiveMSAlign(SMLoc DirectiveLoc, ParseStatementInfo &Info);
686
687 // "end"
688 bool parseDirectiveEnd(SMLoc DirectiveLoc);
689
690 // ".err" or ".error"
691 bool parseDirectiveError(SMLoc DirectiveLoc, bool WithMessage);
692
693 // ".warning"
694 bool parseDirectiveWarning(SMLoc DirectiveLoc);
695
696 // .print <double-quotes-string>
697 bool parseDirectivePrint(SMLoc DirectiveLoc);
698
699 // .pseudoprobe
700 bool parseDirectivePseudoProbe();
701
702 // ".lto_discard"
703 bool parseDirectiveLTODiscard();
704
705 // Directives to support address-significance tables.
706 bool parseDirectiveAddrsig();
707 bool parseDirectiveAddrsigSym();
708
709 void initializeDirectiveKindMap();
710 void initializeCVDefRangeTypeMap();
711};
712
713class HLASMAsmParser final : public AsmParser {
714private:
715 MCAsmLexer &Lexer;
716 MCStreamer &Out;
717
718 void lexLeadingSpaces() {
719 while (Lexer.is(AsmToken::Space))
720 Lexer.Lex();
721 }
722
723 bool parseAsHLASMLabel(ParseStatementInfo &Info, MCAsmParserSemaCallback *SI);
724 bool parseAsMachineInstruction(ParseStatementInfo &Info,
725 MCAsmParserSemaCallback *SI);
726
727public:
728 HLASMAsmParser(SourceMgr &SM, MCContext &Ctx, MCStreamer &Out,
729 const MCAsmInfo &MAI, unsigned CB = 0)
730 : AsmParser(SM, Ctx, Out, MAI, CB), Lexer(getLexer()), Out(Out) {
731 Lexer.setSkipSpace(false);
732 Lexer.setAllowHashInIdentifier(true);
733 Lexer.setLexHLASMIntegers(true);
734 Lexer.setLexHLASMStrings(true);
735 }
736
737 ~HLASMAsmParser() { Lexer.setSkipSpace(true); }
738
739 bool parseStatement(ParseStatementInfo &Info,
740 MCAsmParserSemaCallback *SI) override;
741};
742
743} // end anonymous namespace
744
745namespace llvm {
746
747extern MCAsmParserExtension *createDarwinAsmParser();
748extern MCAsmParserExtension *createELFAsmParser();
749extern MCAsmParserExtension *createCOFFAsmParser();
750extern MCAsmParserExtension *createWasmAsmParser();
751
752} // end namespace llvm
753
754enum { DEFAULT_ADDRSPACE = 0 };
755
756AsmParser::AsmParser(SourceMgr &SM, MCContext &Ctx, MCStreamer &Out,
757 const MCAsmInfo &MAI, unsigned CB = 0)
758 : Lexer(MAI), Ctx(Ctx), Out(Out), MAI(MAI), SrcMgr(SM),
759 CurBuffer(CB ? CB : SM.getMainFileID()), MacrosEnabledFlag(true) {
760 HadError = false;
761 // Save the old handler.
762 SavedDiagHandler = SrcMgr.getDiagHandler();
763 SavedDiagContext = SrcMgr.getDiagContext();
764 // Set our own handler which calls the saved handler.
765 SrcMgr.setDiagHandler(DiagHandler, this);
766 Lexer.setBuffer(SrcMgr.getMemoryBuffer(CurBuffer)->getBuffer());
767 // Make MCStreamer aware of the StartTokLoc for locations in diagnostics.
768 Out.setStartTokLocPtr(&StartTokLoc);
769
770 // Initialize the platform / file format parser.
771 switch (Ctx.getObjectFileType()) {
772 case MCContext::IsCOFF:
773 PlatformParser.reset(createCOFFAsmParser());
774 break;
775 case MCContext::IsMachO:
776 PlatformParser.reset(createDarwinAsmParser());
777 IsDarwin = true;
778 break;
779 case MCContext::IsELF:
780 PlatformParser.reset(createELFAsmParser());
781 break;
782 case MCContext::IsWasm:
783 PlatformParser.reset(createWasmAsmParser());
784 break;
785 case MCContext::IsXCOFF:
786 report_fatal_error(
787 "Need to implement createXCOFFAsmParser for XCOFF format.");
788 break;
789 }
790
791 PlatformParser->Initialize(*this);
792 initializeDirectiveKindMap();
793 initializeCVDefRangeTypeMap();
794
795 NumOfMacroInstantiations = 0;
796}
797
798AsmParser::~AsmParser() {
799 assert((HadError || ActiveMacros.empty()) &&(static_cast <bool> ((HadError || ActiveMacros.empty())
&& "Unexpected active macro instantiation!") ? void (
0) : __assert_fail ("(HadError || ActiveMacros.empty()) && \"Unexpected active macro instantiation!\""
, "/build/llvm-toolchain-snapshot-13~++20210613111130+5be314f79ba7/llvm/lib/MC/MCParser/AsmParser.cpp"
, 800, __extension__ __PRETTY_FUNCTION__))
800 "Unexpected active macro instantiation!")(static_cast <bool> ((HadError || ActiveMacros.empty())
&& "Unexpected active macro instantiation!") ? void (
0) : __assert_fail ("(HadError || ActiveMacros.empty()) && \"Unexpected active macro instantiation!\""
, "/build/llvm-toolchain-snapshot-13~++20210613111130+5be314f79ba7/llvm/lib/MC/MCParser/AsmParser.cpp"
, 800, __extension__ __PRETTY_FUNCTION__))
;
801
802 // Remove MCStreamer's reference to the parser SMLoc.
803 Out.setStartTokLocPtr(nullptr);
804 // Restore the saved diagnostics handler and context for use during
805 // finalization.
806 SrcMgr.setDiagHandler(SavedDiagHandler, SavedDiagContext);
807}
808
809void AsmParser::printMacroInstantiations() {
810 // Print the active macro instantiation stack.
811 for (std::vector<MacroInstantiation *>::const_reverse_iterator
812 it = ActiveMacros.rbegin(),
813 ie = ActiveMacros.rend();
814 it != ie; ++it)
815 printMessage((*it)->InstantiationLoc, SourceMgr::DK_Note,
816 "while in macro instantiation");
817}
818
819void AsmParser::Note(SMLoc L, const Twine &Msg, SMRange Range) {
820 printPendingErrors();
821 printMessage(L, SourceMgr::DK_Note, Msg, Range);
822 printMacroInstantiations();
823}
824
825bool AsmParser::Warning(SMLoc L, const Twine &Msg, SMRange Range) {
826 if(getTargetParser().getTargetOptions().MCNoWarn)
827 return false;
828 if (getTargetParser().getTargetOptions().MCFatalWarnings)
829 return Error(L, Msg, Range);
830 printMessage(L, SourceMgr::DK_Warning, Msg, Range);
831 printMacroInstantiations();
832 return false;
833}
834
835bool AsmParser::printError(SMLoc L, const Twine &Msg, SMRange Range) {
836 HadError = true;
837 printMessage(L, SourceMgr::DK_Error, Msg, Range);
838 printMacroInstantiations();
839 return true;
840}
841
842bool AsmParser::enterIncludeFile(const std::string &Filename) {
843 std::string IncludedFile;
844 unsigned NewBuf =
845 SrcMgr.AddIncludeFile(Filename, Lexer.getLoc(), IncludedFile);
846 if (!NewBuf)
847 return true;
848
849 CurBuffer = NewBuf;
850 Lexer.setBuffer(SrcMgr.getMemoryBuffer(CurBuffer)->getBuffer());
851 return false;
852}
853
854/// Process the specified .incbin file by searching for it in the include paths
855/// then just emitting the byte contents of the file to the streamer. This
856/// returns true on failure.
857bool AsmParser::processIncbinFile(const std::string &Filename, int64_t Skip,
858 const MCExpr *Count, SMLoc Loc) {
859 std::string IncludedFile;
860 unsigned NewBuf =
861 SrcMgr.AddIncludeFile(Filename, Lexer.getLoc(), IncludedFile);
862 if (!NewBuf)
863 return true;
864
865 // Pick up the bytes from the file and emit them.
866 StringRef Bytes = SrcMgr.getMemoryBuffer(NewBuf)->getBuffer();
867 Bytes = Bytes.drop_front(Skip);
868 if (Count) {
869 int64_t Res;
870 if (!Count->evaluateAsAbsolute(Res, getStreamer().getAssemblerPtr()))
871 return Error(Loc, "expected absolute expression");
872 if (Res < 0)
873 return Warning(Loc, "negative count has no effect");
874 Bytes = Bytes.take_front(Res);
875 }
876 getStreamer().emitBytes(Bytes);
877 return false;
878}
879
880void AsmParser::jumpToLoc(SMLoc Loc, unsigned InBuffer) {
881 CurBuffer = InBuffer ? InBuffer : SrcMgr.FindBufferContainingLoc(Loc);
882 Lexer.setBuffer(SrcMgr.getMemoryBuffer(CurBuffer)->getBuffer(),
883 Loc.getPointer());
884}
885
886const AsmToken &AsmParser::Lex() {
887 if (Lexer.getTok().is(AsmToken::Error))
888 Error(Lexer.getErrLoc(), Lexer.getErr());
889
890 // if it's a end of statement with a comment in it
891 if (getTok().is(AsmToken::EndOfStatement)) {
892 // if this is a line comment output it.
893 if (!getTok().getString().empty() && getTok().getString().front() != '\n' &&
894 getTok().getString().front() != '\r' && MAI.preserveAsmComments())
895 Out.addExplicitComment(Twine(getTok().getString()));
896 }
897
898 const AsmToken *tok = &Lexer.Lex();
899
900 // Parse comments here to be deferred until end of next statement.
901 while (tok->is(AsmToken::Comment)) {
902 if (MAI.preserveAsmComments())
903 Out.addExplicitComment(Twine(tok->getString()));
904 tok = &Lexer.Lex();
905 }
906
907 if (tok->is(AsmToken::Eof)) {
908 // If this is the end of an included file, pop the parent file off the
909 // include stack.
910 SMLoc ParentIncludeLoc = SrcMgr.getParentIncludeLoc(CurBuffer);
911 if (ParentIncludeLoc != SMLoc()) {
912 jumpToLoc(ParentIncludeLoc);
913 return Lex();
914 }
915 }
916
917 return *tok;
918}
919
920bool AsmParser::enabledGenDwarfForAssembly() {
921 // Check whether the user specified -g.
922 if (!getContext().getGenDwarfForAssembly())
923 return false;
924 // If we haven't encountered any .file directives (which would imply that
925 // the assembler source was produced with debug info already) then emit one
926 // describing the assembler source file itself.
927 if (getContext().getGenDwarfFileNumber() == 0) {
928 // Use the first #line directive for this, if any. It's preprocessed, so
929 // there is no checksum, and of course no source directive.
930 if (!FirstCppHashFilename.empty())
931 getContext().setMCLineTableRootFile(/*CUID=*/0,
932 getContext().getCompilationDir(),
933 FirstCppHashFilename,
934 /*Cksum=*/None, /*Source=*/None);
935 const MCDwarfFile &RootFile =
936 getContext().getMCDwarfLineTable(/*CUID=*/0).getRootFile();
937 getContext().setGenDwarfFileNumber(getStreamer().emitDwarfFileDirective(
938 /*CUID=*/0, getContext().getCompilationDir(), RootFile.Name,
939 RootFile.Checksum, 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(false);
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(SectionStartSym);
967 Sec->setBeginSymbol(SectionStartSym);
968 }
969 bool InsertResult = getContext().addGenDwarfSection(Sec);
970 assert(InsertResult && ".text section should not have debug info yet")(static_cast <bool> (InsertResult && ".text section should not have debug info yet"
) ? void (0) : __assert_fail ("InsertResult && \".text section should not have debug info yet\""
, "/build/llvm-toolchain-snapshot-13~++20210613111130+5be314f79ba7/llvm/lib/MC/MCParser/AsmParser.cpp"
, 970, __extension__ __PRETTY_FUNCTION__))
;
971 (void)InsertResult;
972 }
973
974 getTargetParser().onBeginOfFile();
975
976 // While we have input, parse each statement.
977 while (Lexer.isNot(AsmToken::Eof)) {
978 ParseStatementInfo Info(&AsmStrRewrites);
979 bool Parsed = parseStatement(Info, 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 (Parsed && !hasPendingError() && Lexer.getTok().is(AsmToken::Error)) {
985 Lex();
986 }
987
988 // parseStatement returned true so may need to emit an error.
989 printPendingErrors();
990
991 // Skipping to the next line if needed.
992 if (Parsed && !getLexer().isAtStartOfStatement())
993 eatToEndOfStatement();
994 }
995
996 getTargetParser().onEndOfFile();
997 printPendingErrors();
998
999 // All errors should have been emitted.
1000 assert(!hasPendingError() && "unexpected error from parseStatement")(static_cast <bool> (!hasPendingError() && "unexpected error from parseStatement"
) ? void (0) : __assert_fail ("!hasPendingError() && \"unexpected error from parseStatement\""
, "/build/llvm-toolchain-snapshot-13~++20210613111130+5be314f79ba7/llvm/lib/MC/MCParser/AsmParser.cpp"
, 1000, __extension__ __PRETTY_FUNCTION__))
;
1001
1002 getTargetParser().flushPendingInstructions(getStreamer());
1003
1004 if (TheCondState.TheCond != StartingCondState.TheCond ||
1005 TheCondState.Ignore != StartingCondState.Ignore)
1006 printError(getTok().getLoc(), "unmatched .ifs or .elses");
1007 // Check to see there are no empty DwarfFile slots.
1008 const auto &LineTables = getContext().getMCDwarfLineTables();
1009 if (!LineTables.empty()) {
1010 unsigned Index = 0;
1011 for (const auto &File : LineTables.begin()->second.getMCDwarfFiles()) {
1012 if (File.Name.empty() && Index != 0)
1013 printError(getTok().getLoc(), "unassigned file number: " +
1014 Twine(Index) +
1015 " for .file directives");
1016 ++Index;
1017 }
1018 }
1019
1020 // Check to see that all assembler local symbols were actually defined.
1021 // Targets that don't do subsections via symbols may not want this, though,
1022 // so conservatively exclude them. Only do this if we're finalizing, though,
1023 // as otherwise we won't necessarilly have seen everything yet.
1024 if (!NoFinalize) {
1025 if (MAI.hasSubsectionsViaSymbols()) {
1026 for (const auto &TableEntry : getContext().getSymbols()) {
1027 MCSymbol *Sym = TableEntry.getValue();
1028 // Variable symbols may not be marked as defined, so check those
1029 // explicitly. If we know it's a variable, we have a definition for
1030 // the purposes of this check.
1031 if (Sym->isTemporary() && !Sym->isVariable() && !Sym->isDefined())
1032 // FIXME: We would really like to refer back to where the symbol was
1033 // first referenced for a source location. We need to add something
1034 // to track that. Currently, we just point to the end of the file.
1035 printError(getTok().getLoc(), "assembler local symbol '" +
1036 Sym->getName() + "' not defined");
1037 }
1038 }
1039
1040 // Temporary symbols like the ones for directional jumps don't go in the
1041 // symbol table. They also need to be diagnosed in all (final) cases.
1042 for (std::tuple<SMLoc, CppHashInfoTy, MCSymbol *> &LocSym : DirLabels) {
1043 if (std::get<2>(LocSym)->isUndefined()) {
1044 // Reset the state of any "# line file" directives we've seen to the
1045 // context as it was at the diagnostic site.
1046 CppHashInfo = std::get<1>(LocSym);
1047 printError(std::get<0>(LocSym), "directional label undefined");
1048 }
1049 }
1050 }
1051
1052 // Finalize the output stream if there are no errors and if the client wants
1053 // us to.
1054 if (!HadError && !NoFinalize)
1055 Out.Finish(Lexer.getLoc());
1056
1057 return HadError || getContext().hadError();
1058}
1059
1060bool AsmParser::checkForValidSection() {
1061 if (!ParsingMSInlineAsm && !getStreamer().getCurrentSectionOnly()) {
1062 Out.InitSections(false);
1063 return Error(getTok().getLoc(),
1064 "expected section directive before assembly directive");
1065 }
1066 return false;
1067}
1068
1069/// Throw away the rest of the line for testing purposes.
1070void AsmParser::eatToEndOfStatement() {
1071 while (Lexer.isNot(AsmToken::EndOfStatement) && Lexer.isNot(AsmToken::Eof))
1072 Lexer.Lex();
1073
1074 // Eat EOL.
1075 if (Lexer.is(AsmToken::EndOfStatement))
1076 Lexer.Lex();
1077}
1078
1079StringRef AsmParser::parseStringToEndOfStatement() {
1080 const char *Start = getTok().getLoc().getPointer();
1081
1082 while (Lexer.isNot(AsmToken::EndOfStatement) && Lexer.isNot(AsmToken::Eof))
1083 Lexer.Lex();
1084
1085 const char *End = getTok().getLoc().getPointer();
1086 return StringRef(Start, End - Start);
1087}
1088
1089StringRef AsmParser::parseStringToComma() {
1090 const char *Start = getTok().getLoc().getPointer();
1091
1092 while (Lexer.isNot(AsmToken::EndOfStatement) &&
1093 Lexer.isNot(AsmToken::Comma) && Lexer.isNot(AsmToken::Eof))
1094 Lexer.Lex();
1095
1096 const char *End = getTok().getLoc().getPointer();
1097 return StringRef(Start, End - Start);
1098}
1099
1100/// Parse a paren expression and return it.
1101/// NOTE: This assumes the leading '(' has already been consumed.
1102///
1103/// parenexpr ::= expr)
1104///
1105bool AsmParser::parseParenExpr(const MCExpr *&Res, SMLoc &EndLoc) {
1106 if (parseExpression(Res))
1107 return true;
1108 if (Lexer.isNot(AsmToken::RParen))
1109 return TokError("expected ')' in parentheses expression");
1110 EndLoc = Lexer.getTok().getEndLoc();
1111 Lex();
1112 return false;
1113}
1114
1115/// Parse a bracket expression and return it.
1116/// NOTE: This assumes the leading '[' has already been consumed.
1117///
1118/// bracketexpr ::= expr]
1119///
1120bool AsmParser::parseBracketExpr(const MCExpr *&Res, SMLoc &EndLoc) {
1121 if (parseExpression(Res))
1122 return true;
1123 EndLoc = getTok().getEndLoc();
1124 if (parseToken(AsmToken::RBrac, "expected ']' in brackets expression"))
1125 return true;
1126 return false;
1127}
1128
1129/// Parse a primary expression and return it.
1130/// primaryexpr ::= (parenexpr
1131/// primaryexpr ::= symbol
1132/// primaryexpr ::= number
1133/// primaryexpr ::= '.'
1134/// primaryexpr ::= ~,+,- primaryexpr
1135bool AsmParser::parsePrimaryExpr(const MCExpr *&Res, SMLoc &EndLoc,
1136 AsmTypeInfo *TypeInfo) {
1137 SMLoc FirstTokenLoc = getLexer().getLoc();
1138 AsmToken::TokenKind FirstTokenKind = Lexer.getKind();
1139 switch (FirstTokenKind) {
1140 default:
1141 return TokError("unknown token in expression");
1142 // If we have an error assume that we've already handled it.
1143 case AsmToken::Error:
1144 return true;
1145 case AsmToken::Exclaim:
1146 Lex(); // Eat the operator.
1147 if (parsePrimaryExpr(Res, EndLoc, TypeInfo))
1148 return true;
1149 Res = MCUnaryExpr::createLNot(Res, getContext(), FirstTokenLoc);
1150 return false;
1151 case AsmToken::Dollar:
1152 case AsmToken::Star:
1153 case AsmToken::At:
1154 case AsmToken::String:
1155 case AsmToken::Identifier: {
1156 StringRef Identifier;
1157 if (parseIdentifier(Identifier)) {
1158 // We may have failed but '$'|'*' may be a valid token in context of
1159 // the current PC.
1160 if (getTok().is(AsmToken::Dollar) || getTok().is(AsmToken::Star)) {
1161 bool ShouldGenerateTempSymbol = false;
1162 if ((getTok().is(AsmToken::Dollar) && MAI.getDollarIsPC()) ||
1163 (getTok().is(AsmToken::Star) && MAI.getStarIsPC()))
1164 ShouldGenerateTempSymbol = true;
1165
1166 if (!ShouldGenerateTempSymbol)
1167 return Error(FirstTokenLoc, "invalid token in expression");
1168
1169 // Eat the '$'|'*' token.
1170 Lex();
1171 // This is either a '$'|'*' reference, which references the current PC.
1172 // Emit a temporary label to the streamer and refer to it.
1173 MCSymbol *Sym = Ctx.createTempSymbol();
1174 Out.emitLabel(Sym);
1175 Res = MCSymbolRefExpr::create(Sym, MCSymbolRefExpr::VK_None,
1176 getContext());
1177 EndLoc = FirstTokenLoc;
1178 return false;
1179 }
1180 }
1181 // Parse symbol variant
1182 std::pair<StringRef, StringRef> Split;
1183 if (!MAI.useParensForSymbolVariant()) {
1184 if (FirstTokenKind == AsmToken::String) {
1185 if (Lexer.is(AsmToken::At)) {
1186 Lex(); // eat @
1187 SMLoc AtLoc = getLexer().getLoc();
1188 StringRef VName;
1189 if (parseIdentifier(VName))
1190 return Error(AtLoc, "expected symbol variant after '@'");
1191
1192 Split = std::make_pair(Identifier, VName);
1193 }
1194 } else {
1195 Split = Identifier.split('@');
1196 }
1197 } else if (Lexer.is(AsmToken::LParen)) {
1198 Lex(); // eat '('.
1199 StringRef VName;
1200 parseIdentifier(VName);
1201 // eat ')'.
1202 if (parseToken(AsmToken::RParen,
1203 "unexpected token in variant, expected ')'"))
1204 return true;
1205 Split = std::make_pair(Identifier, VName);
1206 }
1207
1208 EndLoc = SMLoc::getFromPointer(Identifier.end());
1209
1210 // This is a symbol reference.
1211 StringRef SymbolName = Identifier;
1212 if (SymbolName.empty())
1213 return Error(getLexer().getLoc(), "expected a symbol reference");
1214
1215 MCSymbolRefExpr::VariantKind Variant = MCSymbolRefExpr::VK_None;
1216
1217 // Lookup the symbol variant if used.
1218 if (!Split.second.empty()) {
1219 Variant = MCSymbolRefExpr::getVariantKindForName(Split.second);
1220 if (Variant != MCSymbolRefExpr::VK_Invalid) {
1221 SymbolName = Split.first;
1222 } else if (MAI.doesAllowAtInName() && !MAI.useParensForSymbolVariant()) {
1223 Variant = MCSymbolRefExpr::VK_None;
1224 } else {
1225 return Error(SMLoc::getFromPointer(Split.second.begin()),
1226 "invalid variant '" + Split.second + "'");
1227 }
1228 }
1229
1230 MCSymbol *Sym = getContext().getInlineAsmLabel(SymbolName);
1231 if (!Sym)
1232 Sym = getContext().getOrCreateSymbol(SymbolName);
1233
1234 // If this is an absolute variable reference, substitute it now to preserve
1235 // semantics in the face of reassignment.
1236 if (Sym->isVariable()) {
1237 auto V = Sym->getVariableValue(/*SetUsed*/ false);
1238 bool DoInline = isa<MCConstantExpr>(V) && !Variant;
1239 if (auto TV = dyn_cast<MCTargetExpr>(V))
1240 DoInline = TV->inlineAssignedExpr();
1241 if (DoInline) {
1242 if (Variant)
1243 return Error(EndLoc, "unexpected modifier on variable reference");
1244 Res = Sym->getVariableValue(/*SetUsed*/ false);
1245 return false;
1246 }
1247 }
1248
1249 // Otherwise create a symbol ref.
1250 Res = MCSymbolRefExpr::create(Sym, Variant, getContext(), FirstTokenLoc);
1251 return false;
1252 }
1253 case AsmToken::BigNum:
1254 return TokError("literal value out of range for directive");
1255 case AsmToken::Integer: {
1256 SMLoc Loc = getTok().getLoc();
1257 int64_t IntVal = getTok().getIntVal();
1258 Res = MCConstantExpr::create(IntVal, getContext());
1259 EndLoc = Lexer.getTok().getEndLoc();
1260 Lex(); // Eat token.
1261 // Look for 'b' or 'f' following an Integer as a directional label
1262 if (Lexer.getKind() == AsmToken::Identifier) {
1263 StringRef IDVal = getTok().getString();
1264 // Lookup the symbol variant if used.
1265 std::pair<StringRef, StringRef> Split = IDVal.split('@');
1266 MCSymbolRefExpr::VariantKind Variant = MCSymbolRefExpr::VK_None;
1267 if (Split.first.size() != IDVal.size()) {
1268 Variant = MCSymbolRefExpr::getVariantKindForName(Split.second);
1269 if (Variant == MCSymbolRefExpr::VK_Invalid)
1270 return TokError("invalid variant '" + Split.second + "'");
1271 IDVal = Split.first;
1272 }
1273 if (IDVal == "f" || IDVal == "b") {
1274 MCSymbol *Sym =
1275 Ctx.getDirectionalLocalSymbol(IntVal, IDVal == "b");
1276 Res = MCSymbolRefExpr::create(Sym, Variant, getContext());
1277 if (IDVal == "b" && Sym->isUndefined())
1278 return Error(Loc, "directional label undefined");
1279 DirLabels.push_back(std::make_tuple(Loc, CppHashInfo, Sym));
1280 EndLoc = Lexer.getTok().getEndLoc();
1281 Lex(); // Eat identifier.
1282 }
1283 }
1284 return false;
1285 }
1286 case AsmToken::Real: {
1287 APFloat RealVal(APFloat::IEEEdouble(), getTok().getString());
1288 uint64_t IntVal = RealVal.bitcastToAPInt().getZExtValue();
1289 Res = MCConstantExpr::create(IntVal, getContext());
1290 EndLoc = Lexer.getTok().getEndLoc();
1291 Lex(); // Eat token.
1292 return false;
1293 }
1294 case AsmToken::Dot: {
1295 if (!MAI.getDotIsPC())
1296 return TokError("cannot use . as current PC");
1297
1298 // This is a '.' reference, which references the current PC. Emit a
1299 // temporary label to the streamer and refer to it.
1300 MCSymbol *Sym = Ctx.createTempSymbol();
1301 Out.emitLabel(Sym);
1302 Res = MCSymbolRefExpr::create(Sym, MCSymbolRefExpr::VK_None, getContext());
1303 EndLoc = Lexer.getTok().getEndLoc();
1304 Lex(); // Eat identifier.
1305 return false;
1306 }
1307 case AsmToken::LParen:
1308 Lex(); // Eat the '('.
1309 return parseParenExpr(Res, EndLoc);
1310 case AsmToken::LBrac:
1311 if (!PlatformParser->HasBracketExpressions())
1312 return TokError("brackets expression not supported on this target");
1313 Lex(); // Eat the '['.
1314 return parseBracketExpr(Res, EndLoc);
1315 case AsmToken::Minus:
1316 Lex(); // Eat the operator.
1317 if (parsePrimaryExpr(Res, EndLoc, TypeInfo))
1318 return true;
1319 Res = MCUnaryExpr::createMinus(Res, getContext(), FirstTokenLoc);
1320 return false;
1321 case AsmToken::Plus:
1322 Lex(); // Eat the operator.
1323 if (parsePrimaryExpr(Res, EndLoc, TypeInfo))
1324 return true;
1325 Res = MCUnaryExpr::createPlus(Res, getContext(), FirstTokenLoc);
1326 return false;
1327 case AsmToken::Tilde:
1328 Lex(); // Eat the operator.
1329 if (parsePrimaryExpr(Res, EndLoc, TypeInfo))
1330 return true;
1331 Res = MCUnaryExpr::createNot(Res, getContext(), FirstTokenLoc);
1332 return false;
1333 // MIPS unary expression operators. The lexer won't generate these tokens if
1334 // MCAsmInfo::HasMipsExpressions is false for the target.
1335 case AsmToken::PercentCall16:
1336 case AsmToken::PercentCall_Hi:
1337 case AsmToken::PercentCall_Lo:
1338 case AsmToken::PercentDtprel_Hi:
1339 case AsmToken::PercentDtprel_Lo:
1340 case AsmToken::PercentGot:
1341 case AsmToken::PercentGot_Disp:
1342 case AsmToken::PercentGot_Hi:
1343 case AsmToken::PercentGot_Lo:
1344 case AsmToken::PercentGot_Ofst:
1345 case AsmToken::PercentGot_Page:
1346 case AsmToken::PercentGottprel:
1347 case AsmToken::PercentGp_Rel:
1348 case AsmToken::PercentHi:
1349 case AsmToken::PercentHigher:
1350 case AsmToken::PercentHighest:
1351 case AsmToken::PercentLo:
1352 case AsmToken::PercentNeg:
1353 case AsmToken::PercentPcrel_Hi:
1354 case AsmToken::PercentPcrel_Lo:
1355 case AsmToken::PercentTlsgd:
1356 case AsmToken::PercentTlsldm:
1357 case AsmToken::PercentTprel_Hi:
1358 case AsmToken::PercentTprel_Lo:
1359 Lex(); // Eat the operator.
1360 if (Lexer.isNot(AsmToken::LParen))
1361 return TokError("expected '(' after operator");
1362 Lex(); // Eat the operator.
1363 if (parseExpression(Res, EndLoc))
1364 return true;
1365 if (Lexer.isNot(AsmToken::RParen))
1366 return TokError("expected ')'");
1367 Lex(); // Eat the operator.
1368 Res = getTargetParser().createTargetUnaryExpr(Res, FirstTokenKind, Ctx);
1369 return !Res;
1370 }
1371}
1372
1373bool AsmParser::parseExpression(const MCExpr *&Res) {
1374 SMLoc EndLoc;
1375 return parseExpression(Res, EndLoc);
1376}
1377
1378const MCExpr *
1379AsmParser::applyModifierToExpr(const MCExpr *E,
1380 MCSymbolRefExpr::VariantKind Variant) {
1381 // Ask the target implementation about this expression first.
1382 const MCExpr *NewE = getTargetParser().applyModifierToExpr(E, Variant, Ctx);
1383 if (NewE)
1384 return NewE;
1385 // Recurse over the given expression, rebuilding it to apply the given variant
1386 // if there is exactly one symbol.
1387 switch (E->getKind()) {
1388 case MCExpr::Target:
1389 case MCExpr::Constant:
1390 return nullptr;
1391
1392 case MCExpr::SymbolRef: {
1393 const MCSymbolRefExpr *SRE = cast<MCSymbolRefExpr>(E);
1394
1395 if (SRE->getKind() != MCSymbolRefExpr::VK_None) {
1396 TokError("invalid variant on expression '" + getTok().getIdentifier() +
1397 "' (already modified)");
1398 return E;
1399 }
1400
1401 return MCSymbolRefExpr::create(&SRE->getSymbol(), Variant, getContext());
1402 }
1403
1404 case MCExpr::Unary: {
1405 const MCUnaryExpr *UE = cast<MCUnaryExpr>(E);
1406 const MCExpr *Sub = applyModifierToExpr(UE->getSubExpr(), Variant);
1407 if (!Sub)
1408 return nullptr;
1409 return MCUnaryExpr::create(UE->getOpcode(), Sub, getContext());
1410 }
1411
1412 case MCExpr::Binary: {
1413 const MCBinaryExpr *BE = cast<MCBinaryExpr>(E);
1414 const MCExpr *LHS = applyModifierToExpr(BE->getLHS(), Variant);
1415 const MCExpr *RHS = applyModifierToExpr(BE->getRHS(), Variant);
1416
1417 if (!LHS && !RHS)
1418 return nullptr;
1419
1420 if (!LHS)
1421 LHS = BE->getLHS();
1422 if (!RHS)
1423 RHS = BE->getRHS();
1424
1425 return MCBinaryExpr::create(BE->getOpcode(), LHS, RHS, getContext());
1426 }
1427 }
1428
1429 llvm_unreachable("Invalid expression kind!")::llvm::llvm_unreachable_internal("Invalid expression kind!",
"/build/llvm-toolchain-snapshot-13~++20210613111130+5be314f79ba7/llvm/lib/MC/MCParser/AsmParser.cpp"
, 1429)
;
1430}
1431
1432/// This function checks if the next token is <string> type or arithmetic.
1433/// string that begin with character '<' must end with character '>'.
1434/// otherwise it is arithmetics.
1435/// If the function returns a 'true' value,
1436/// the End argument will be filled with the last location pointed to the '>'
1437/// character.
1438
1439/// There is a gap between the AltMacro's documentation and the single quote
1440/// implementation. GCC does not fully support this feature and so we will not
1441/// support it.
1442/// TODO: Adding single quote as a string.
1443static bool isAngleBracketString(SMLoc &StrLoc, SMLoc &EndLoc) {
1444 assert((StrLoc.getPointer() != nullptr) &&(static_cast <bool> ((StrLoc.getPointer() != nullptr) &&
"Argument to the function cannot be a NULL value") ? void (0
) : __assert_fail ("(StrLoc.getPointer() != nullptr) && \"Argument to the function cannot be a NULL value\""
, "/build/llvm-toolchain-snapshot-13~++20210613111130+5be314f79ba7/llvm/lib/MC/MCParser/AsmParser.cpp"
, 1445, __extension__ __PRETTY_FUNCTION__))
1445 "Argument to the function cannot be a NULL value")(static_cast <bool> ((StrLoc.getPointer() != nullptr) &&
"Argument to the function cannot be a NULL value") ? void (0
) : __assert_fail ("(StrLoc.getPointer() != nullptr) && \"Argument to the function cannot be a NULL value\""
, "/build/llvm-toolchain-snapshot-13~++20210613111130+5be314f79ba7/llvm/lib/MC/MCParser/AsmParser.cpp"
, 1445, __extension__ __PRETTY_FUNCTION__))
;
1446 const char *CharPtr = StrLoc.getPointer();
1447 while ((*CharPtr != '>') && (*CharPtr != '\n') && (*CharPtr != '\r') &&
1448 (*CharPtr != '\0')) {
1449 if (*CharPtr == '!')
1450 CharPtr++;
1451 CharPtr++;
1452 }
1453 if (*CharPtr == '>') {
1454 EndLoc = StrLoc.getFromPointer(CharPtr + 1);
1455 return true;
1456 }
1457 return false;
1458}
1459
1460/// creating a string without the escape characters '!'.
1461static std::string angleBracketString(StringRef AltMacroStr) {
1462 std::string Res;
1463 for (size_t Pos = 0; Pos < AltMacroStr.size(); Pos++) {
1464 if (AltMacroStr[Pos] == '!')
1465 Pos++;
1466 Res += AltMacroStr[Pos];
1467 }
1468 return Res;
1469}
1470
1471/// Parse an expression and return it.
1472///
1473/// expr ::= expr &&,|| expr -> lowest.
1474/// expr ::= expr |,^,&,! expr
1475/// expr ::= expr ==,!=,<>,<,<=,>,>= expr
1476/// expr ::= expr <<,>> expr
1477/// expr ::= expr +,- expr
1478/// expr ::= expr *,/,% expr -> highest.
1479/// expr ::= primaryexpr
1480///
1481bool AsmParser::parseExpression(const MCExpr *&Res, SMLoc &EndLoc) {
1482 // Parse the expression.
1483 Res = nullptr;
1484 if (getTargetParser().parsePrimaryExpr(Res, EndLoc) ||
1485 parseBinOpRHS(1, Res, EndLoc))
1486 return true;
1487
1488 // As a special case, we support 'a op b @ modifier' by rewriting the
1489 // expression to include the modifier. This is inefficient, but in general we
1490 // expect users to use 'a@modifier op b'.
1491 if (Lexer.getKind() == AsmToken::At) {
1492 Lex();
1493
1494 if (Lexer.isNot(AsmToken::Identifier))
1495 return TokError("unexpected symbol modifier following '@'");
1496
1497 MCSymbolRefExpr::VariantKind Variant =
1498 MCSymbolRefExpr::getVariantKindForName(getTok().getIdentifier());
1499 if (Variant == MCSymbolRefExpr::VK_Invalid)
1500 return TokError("invalid variant '" + getTok().getIdentifier() + "'");
1501
1502 const MCExpr *ModifiedRes = applyModifierToExpr(Res, Variant);
1503 if (!ModifiedRes) {
1504 return TokError("invalid modifier '" + getTok().getIdentifier() +
1505 "' (no symbols present)");
1506 }
1507
1508 Res = ModifiedRes;
1509 Lex();
1510 }
1511
1512 // Try to constant fold it up front, if possible. Do not exploit
1513 // assembler here.
1514 int64_t Value;
1515 if (Res->evaluateAsAbsolute(Value))
1516 Res = MCConstantExpr::create(Value, getContext());
1517
1518 return false;
1519}
1520
1521bool AsmParser::parseParenExpression(const MCExpr *&Res, SMLoc &EndLoc) {
1522 Res = nullptr;
1523 return parseParenExpr(Res, EndLoc) || parseBinOpRHS(1, Res, EndLoc);
1524}
1525
1526bool AsmParser::parseParenExprOfDepth(unsigned ParenDepth, const MCExpr *&Res,
1527 SMLoc &EndLoc) {
1528 if (parseParenExpr(Res, EndLoc))
1529 return true;
1530
1531 for (; ParenDepth > 0; --ParenDepth) {
1532 if (parseBinOpRHS(1, Res, EndLoc))
1533 return true;
1534
1535 // We don't Lex() the last RParen.
1536 // This is the same behavior as parseParenExpression().
1537 if (ParenDepth - 1 > 0) {
1538 EndLoc = getTok().getEndLoc();
1539 if (parseToken(AsmToken::RParen,
1540 "expected ')' in parentheses expression"))
1541 return true;
1542 }
1543 }
1544 return false;
1545}
1546
1547bool AsmParser::parseAbsoluteExpression(int64_t &Res) {
1548 const MCExpr *Expr;
1549
1550 SMLoc StartLoc = Lexer.getLoc();
1551 if (parseExpression(Expr))
1552 return true;
1553
1554 if (!Expr->evaluateAsAbsolute(Res, getStreamer().getAssemblerPtr()))
1555 return Error(StartLoc, "expected absolute expression");
1556
1557 return false;
1558}
1559
1560static unsigned getDarwinBinOpPrecedence(AsmToken::TokenKind K,
1561 MCBinaryExpr::Opcode &Kind,
1562 bool ShouldUseLogicalShr) {
1563 switch (K) {
1564 default:
1565 return 0; // not a binop.
1566
1567 // Lowest Precedence: &&, ||
1568 case AsmToken::AmpAmp:
1569 Kind = MCBinaryExpr::LAnd;
1570 return 1;
1571 case AsmToken::PipePipe:
1572 Kind = MCBinaryExpr::LOr;
1573 return 1;
1574
1575 // Low Precedence: |, &, ^
1576 case AsmToken::Pipe:
1577 Kind = MCBinaryExpr::Or;
1578 return 2;
1579 case AsmToken::Caret:
1580 Kind = MCBinaryExpr::Xor;
1581 return 2;
1582 case AsmToken::Amp:
1583 Kind = MCBinaryExpr::And;
1584 return 2;
1585
1586 // Low Intermediate Precedence: ==, !=, <>, <, <=, >, >=
1587 case AsmToken::EqualEqual:
1588 Kind = MCBinaryExpr::EQ;
1589 return 3;
1590 case AsmToken::ExclaimEqual:
1591 case AsmToken::LessGreater:
1592 Kind = MCBinaryExpr::NE;
1593 return 3;
1594 case AsmToken::Less:
1595 Kind = MCBinaryExpr::LT;
1596 return 3;
1597 case AsmToken::LessEqual:
1598 Kind = MCBinaryExpr::LTE;
1599 return 3;
1600 case AsmToken::Greater:
1601 Kind = MCBinaryExpr::GT;
1602 return 3;
1603 case AsmToken::GreaterEqual:
1604 Kind = MCBinaryExpr::GTE;
1605 return 3;
1606
1607 // Intermediate Precedence: <<, >>
1608 case AsmToken::LessLess:
1609 Kind = MCBinaryExpr::Shl;
1610 return 4;
1611 case AsmToken::GreaterGreater:
1612 Kind = ShouldUseLogicalShr ? MCBinaryExpr::LShr : MCBinaryExpr::AShr;
1613 return 4;
1614
1615 // High Intermediate Precedence: +, -
1616 case AsmToken::Plus:
1617 Kind = MCBinaryExpr::Add;
1618 return 5;
1619 case AsmToken::Minus:
1620 Kind = MCBinaryExpr::Sub;
1621 return 5;
1622
1623 // Highest Precedence: *, /, %
1624 case AsmToken::Star:
1625 Kind = MCBinaryExpr::Mul;
1626 return 6;
1627 case AsmToken::Slash:
1628 Kind = MCBinaryExpr::Div;
1629 return 6;
1630 case AsmToken::Percent:
1631 Kind = MCBinaryExpr::Mod;
1632 return 6;
1633 }
1634}
1635
1636static unsigned getGNUBinOpPrecedence(const MCAsmInfo &MAI,
1637 AsmToken::TokenKind K,
1638 MCBinaryExpr::Opcode &Kind,
1639 bool ShouldUseLogicalShr) {
1640 switch (K) {
1641 default:
1642 return 0; // not a binop.
1643
1644 // Lowest Precedence: &&, ||
1645 case AsmToken::AmpAmp:
1646 Kind = MCBinaryExpr::LAnd;
1647 return 2;
1648 case AsmToken::PipePipe:
1649 Kind = MCBinaryExpr::LOr;
1650 return 1;
1651
1652 // Low Precedence: ==, !=, <>, <, <=, >, >=
1653 case AsmToken::EqualEqual:
1654 Kind = MCBinaryExpr::EQ;
1655 return 3;
1656 case AsmToken::ExclaimEqual:
1657 case AsmToken::LessGreater:
1658 Kind = MCBinaryExpr::NE;
1659 return 3;
1660 case AsmToken::Less:
1661 Kind = MCBinaryExpr::LT;
1662 return 3;
1663 case AsmToken::LessEqual:
1664 Kind = MCBinaryExpr::LTE;
1665 return 3;
1666 case AsmToken::Greater:
1667 Kind = MCBinaryExpr::GT;
1668 return 3;
1669 case AsmToken::GreaterEqual:
1670 Kind = MCBinaryExpr::GTE;
1671 return 3;
1672
1673 // Low Intermediate Precedence: +, -
1674 case AsmToken::Plus:
1675 Kind = MCBinaryExpr::Add;
1676 return 4;
1677 case AsmToken::Minus:
1678 Kind = MCBinaryExpr::Sub;
1679 return 4;
1680
1681 // High Intermediate Precedence: |, !, &, ^
1682 //
1683 case AsmToken::Pipe:
1684 Kind = MCBinaryExpr::Or;
1685 return 5;
1686 case AsmToken::Exclaim:
1687 // Hack to support ARM compatible aliases (implied 'sp' operand in 'srs*'
1688 // instructions like 'srsda #31!') and not parse ! as an infix operator.
1689 if (MAI.getCommentString() == "@")
1690 return 0;
1691 Kind = MCBinaryExpr::OrNot;
1692 return 5;
1693 case AsmToken::Caret:
1694 Kind = MCBinaryExpr::Xor;
1695 return 5;
1696 case AsmToken::Amp:
1697 Kind = MCBinaryExpr::And;
1698 return 5;
1699
1700 // Highest Precedence: *, /, %, <<, >>
1701 case AsmToken::Star:
1702 Kind = MCBinaryExpr::Mul;
1703 return 6;
1704 case AsmToken::Slash:
1705 Kind = MCBinaryExpr::Div;
1706 return 6;
1707 case AsmToken::Percent:
1708 Kind = MCBinaryExpr::Mod;
1709 return 6;
1710 case AsmToken::LessLess:
1711 Kind = MCBinaryExpr::Shl;
1712 return 6;
1713 case AsmToken::GreaterGreater:
1714 Kind = ShouldUseLogicalShr ? MCBinaryExpr::LShr : MCBinaryExpr::AShr;
1715 return 6;
1716 }
1717}
1718
1719unsigned AsmParser::getBinOpPrecedence(AsmToken::TokenKind K,
1720 MCBinaryExpr::Opcode &Kind) {
1721 bool ShouldUseLogicalShr = MAI.shouldUseLogicalShr();
1722 return IsDarwin ? getDarwinBinOpPrecedence(K, Kind, ShouldUseLogicalShr)
1723 : getGNUBinOpPrecedence(MAI, K, Kind, ShouldUseLogicalShr);
1724}
1725
1726/// Parse all binary operators with precedence >= 'Precedence'.
1727/// Res contains the LHS of the expression on input.
1728bool AsmParser::parseBinOpRHS(unsigned Precedence, const MCExpr *&Res,
1729 SMLoc &EndLoc) {
1730 SMLoc StartLoc = Lexer.getLoc();
1731 while (true) {
1732 MCBinaryExpr::Opcode Kind = MCBinaryExpr::Add;
1733 unsigned TokPrec = getBinOpPrecedence(Lexer.getKind(), Kind);
1734
1735 // If the next token is lower precedence than we are allowed to eat, return
1736 // successfully with what we ate already.
1737 if (TokPrec < Precedence)
1738 return false;
1739
1740 Lex();
1741
1742 // Eat the next primary expression.
1743 const MCExpr *RHS;
1744 if (getTargetParser().parsePrimaryExpr(RHS, EndLoc))
1745 return true;
1746
1747 // If BinOp binds less tightly with RHS than the operator after RHS, let
1748 // the pending operator take RHS as its LHS.
1749 MCBinaryExpr::Opcode Dummy;
1750 unsigned NextTokPrec = getBinOpPrecedence(Lexer.getKind(), Dummy);
1751 if (TokPrec < NextTokPrec && parseBinOpRHS(TokPrec + 1, RHS, EndLoc))
1752 return true;
1753
1754 // Merge LHS and RHS according to operator.
1755 Res = MCBinaryExpr::create(Kind, Res, RHS, getContext(), StartLoc);
1756 }
1757}
1758
1759/// ParseStatement:
1760/// ::= EndOfStatement
1761/// ::= Label* Directive ...Operands... EndOfStatement
1762/// ::= Label* Identifier OperandList* EndOfStatement
1763bool AsmParser::parseStatement(ParseStatementInfo &Info,
1764 MCAsmParserSemaCallback *SI) {
1765 assert(!hasPendingError() && "parseStatement started with pending error")(static_cast <bool> (!hasPendingError() && "parseStatement started with pending error"
) ? void (0) : __assert_fail ("!hasPendingError() && \"parseStatement started with pending error\""
, "/build/llvm-toolchain-snapshot-13~++20210613111130+5be314f79ba7/llvm/lib/MC/MCParser/AsmParser.cpp"
, 1765, __extension__ __PRETTY_FUNCTION__))
;
1
'?' condition is true
1766 // Eat initial spaces and comments
1767 while (Lexer.is(AsmToken::Space))
2
Loop condition is false. Execution continues on line 1769
1768 Lex();
1769 if (Lexer.is(AsmToken::EndOfStatement)) {
3
Taking false branch
1770 // if this is a line comment we can drop it safely
1771 if (getTok().getString().empty() || getTok().getString().front() == '\r' ||
1772 getTok().getString().front() == '\n')
1773 Out.AddBlankLine();
1774 Lex();
1775 return false;
1776 }
1777 // Statements always start with an identifier.
1778 AsmToken ID = getTok();
1779 SMLoc IDLoc = ID.getLoc();
1780 StringRef IDVal;
1781 int64_t LocalLabelVal = -1;
1782 StartTokLoc = ID.getLoc();
1783 if (Lexer.is(AsmToken::HashDirective))
4
Taking false branch
1784 return parseCppHashLineFilenameComment(IDLoc,
1785 !isInsideMacroInstantiation());
1786
1787 // Allow an integer followed by a ':' as a directional local label.
1788 if (Lexer.is(AsmToken::Integer)) {
5
Taking false branch
1789 LocalLabelVal = getTok().getIntVal();
1790 if (LocalLabelVal < 0) {
1791 if (!TheCondState.Ignore) {
1792 Lex(); // always eat a token
1793 return Error(IDLoc, "unexpected token at start of statement");
1794 }
1795 IDVal = "";
1796 } else {
1797 IDVal = getTok().getString();
1798 Lex(); // Consume the integer token to be used as an identifier token.
1799 if (Lexer.getKind() != AsmToken::Colon) {
1800 if (!TheCondState.Ignore) {
1801 Lex(); // always eat a token
1802 return Error(IDLoc, "unexpected token at start of statement");
1803 }
1804 }
1805 }
1806 } else if (Lexer.is(AsmToken::Dot)) {
6
Taking false branch
1807 // Treat '.' as a valid identifier in this context.
1808 Lex();
1809 IDVal = ".";
1810 } else if (Lexer.is(AsmToken::LCurly)) {
7
Taking false branch
1811 // Treat '{' as a valid identifier in this context.
1812 Lex();
1813 IDVal = "{";
1814
1815 } else if (Lexer.is(AsmToken::RCurly)) {
8
Taking false branch
1816 // Treat '}' as a valid identifier in this context.
1817 Lex();
1818 IDVal = "}";
1819 } else if (Lexer.is(AsmToken::Star) &&
1820 getTargetParser().starIsStartOfStatement()) {
1821 // Accept '*' as a valid start of statement.
1822 Lex();
1823 IDVal = "*";
1824 } else if (parseIdentifier(IDVal)) {
9
Assuming the condition is false
10
Taking false branch
1825 if (!TheCondState.Ignore) {
1826 Lex(); // always eat a token
1827 return Error(IDLoc, "unexpected token at start of statement");
1828 }
1829 IDVal = "";
1830 }
1831
1832 // Handle conditional assembly here before checking for skipping. We
1833 // have to do this so that .endif isn't skipped in a ".if 0" block for
1834 // example.
1835 StringMap<DirectiveKind>::const_iterator DirKindIt =
1836 DirectiveKindMap.find(IDVal.lower());
1837 DirectiveKind DirKind = (DirKindIt == DirectiveKindMap.end())
11
'?' condition is false
1838 ? DK_NO_DIRECTIVE
1839 : DirKindIt->getValue();
1840 switch (DirKind) {
12
Control jumps to the 'default' case at line 1841
1841 default:
1842 break;
13
Execution continues on line 1878
1843 case DK_IF:
1844 case DK_IFEQ:
1845 case DK_IFGE:
1846 case DK_IFGT:
1847 case DK_IFLE:
1848 case DK_IFLT:
1849 case DK_IFNE:
1850 return parseDirectiveIf(IDLoc, DirKind);
1851 case DK_IFB:
1852 return parseDirectiveIfb(IDLoc, true);
1853 case DK_IFNB:
1854 return parseDirectiveIfb(IDLoc, false);
1855 case DK_IFC:
1856 return parseDirectiveIfc(IDLoc, true);
1857 case DK_IFEQS:
1858 return parseDirectiveIfeqs(IDLoc, true);
1859 case DK_IFNC:
1860 return parseDirectiveIfc(IDLoc, false);
1861 case DK_IFNES:
1862 return parseDirectiveIfeqs(IDLoc, false);
1863 case DK_IFDEF:
1864 return parseDirectiveIfdef(IDLoc, true);
1865 case DK_IFNDEF:
1866 case DK_IFNOTDEF:
1867 return parseDirectiveIfdef(IDLoc, false);
1868 case DK_ELSEIF:
1869 return parseDirectiveElseIf(IDLoc);
1870 case DK_ELSE:
1871 return parseDirectiveElse(IDLoc);
1872 case DK_ENDIF:
1873 return parseDirectiveEndIf(IDLoc);
1874 }
1875
1876 // Ignore the statement if in the middle of inactive conditional
1877 // (e.g. ".if 0").
1878 if (TheCondState.Ignore) {
14
Assuming field 'Ignore' is false
15
Taking false branch
1879 eatToEndOfStatement();
1880 return false;
1881 }
1882
1883 // FIXME: Recurse on local labels?
1884
1885 // See what kind of statement we have.
1886 switch (Lexer.getKind()) {
16
Control jumps to the 'default' case at line 1963
1887 case AsmToken::Colon: {
1888 if (!getTargetParser().isLabel(ID))
1889 break;
1890 if (checkForValidSection())
1891 return true;
1892
1893 // identifier ':' -> Label.
1894 Lex();
1895
1896 // Diagnose attempt to use '.' as a label.
1897 if (IDVal == ".")
1898 return Error(IDLoc, "invalid use of pseudo-symbol '.' as a label");
1899
1900 // Diagnose attempt to use a variable as a label.
1901 //
1902 // FIXME: Diagnostics. Note the location of the definition as a label.
1903 // FIXME: This doesn't diagnose assignment to a symbol which has been
1904 // implicitly marked as external.
1905 MCSymbol *Sym;
1906 if (LocalLabelVal == -1) {
1907 if (ParsingMSInlineAsm && SI) {
1908 StringRef RewrittenLabel =
1909 SI->LookupInlineAsmLabel(IDVal, getSourceManager(), IDLoc, true);
1910 assert(!RewrittenLabel.empty() &&(static_cast <bool> (!RewrittenLabel.empty() &&
"We should have an internal name here.") ? void (0) : __assert_fail
("!RewrittenLabel.empty() && \"We should have an internal name here.\""
, "/build/llvm-toolchain-snapshot-13~++20210613111130+5be314f79ba7/llvm/lib/MC/MCParser/AsmParser.cpp"
, 1911, __extension__ __PRETTY_FUNCTION__))
1911 "We should have an internal name here.")(static_cast <bool> (!RewrittenLabel.empty() &&
"We should have an internal name here.") ? void (0) : __assert_fail
("!RewrittenLabel.empty() && \"We should have an internal name here.\""
, "/build/llvm-toolchain-snapshot-13~++20210613111130+5be314f79ba7/llvm/lib/MC/MCParser/AsmParser.cpp"
, 1911, __extension__ __PRETTY_FUNCTION__))
;
1912 Info.AsmRewrites->emplace_back(AOK_Label, IDLoc, IDVal.size(),
1913 RewrittenLabel);
1914 IDVal = RewrittenLabel;
1915 }
1916 Sym = getContext().getOrCreateSymbol(IDVal);
1917 } else
1918 Sym = Ctx.createDirectionalLocalSymbol(LocalLabelVal);
1919 // End of Labels should be treated as end of line for lexing
1920 // purposes but that information is not available to the Lexer who
1921 // does not understand Labels. This may cause us to see a Hash
1922 // here instead of a preprocessor line comment.
1923 if (getTok().is(AsmToken::Hash)) {
1924 StringRef CommentStr = parseStringToEndOfStatement();
1925 Lexer.Lex();
1926 Lexer.UnLex(AsmToken(AsmToken::EndOfStatement, CommentStr));
1927 }
1928
1929 // Consume any end of statement token, if present, to avoid spurious
1930 // AddBlankLine calls().
1931 if (getTok().is(AsmToken::EndOfStatement)) {
1932 Lex();
1933 }
1934
1935 if (discardLTOSymbol(IDVal))
1936 return false;
1937
1938 getTargetParser().doBeforeLabelEmit(Sym);
1939
1940 // Emit the label.
1941 if (!getTargetParser().isParsingMSInlineAsm())
1942 Out.emitLabel(Sym, IDLoc);
1943
1944 // If we are generating dwarf for assembly source files then gather the
1945 // info to make a dwarf label entry for this label if needed.
1946 if (enabledGenDwarfForAssembly())
1947 MCGenDwarfLabelEntry::Make(Sym, &getStreamer(), getSourceManager(),
1948 IDLoc);
1949
1950 getTargetParser().onLabelParsed(Sym);
1951
1952 return false;
1953 }
1954
1955 case AsmToken::Equal:
1956 if (!getTargetParser().equalIsAsmAssignment())
1957 break;
1958 // identifier '=' ... -> assignment statement
1959 Lex();
1960
1961 return parseAssignment(IDVal, true);
1962
1963 default: // Normal instruction or directive.
1964 break;
17
Execution continues on line 1968
1965 }
1966
1967 // If macros are enabled, check to see if this is a macro instantiation.
1968 if (areMacrosEnabled())
18
Assuming the condition is false
19
Taking false branch
1969 if (const MCAsmMacro *M = getContext().lookupMacro(IDVal)) {
1970 return handleMacroEntry(M, IDLoc);
1971 }
1972
1973 // Otherwise, we have a normal instruction or directive.
1974
1975 // Directives start with "."
1976 if (IDVal.startswith(".") && IDVal != ".") {
20
Assuming the condition is true
21
Taking true branch
1977 // There are several entities interested in parsing directives:
1978 //
1979 // 1. The target-specific assembly parser. Some directives are target
1980 // specific or may potentially behave differently on certain targets.
1981 // 2. Asm parser extensions. For example, platform-specific parsers
1982 // (like the ELF parser) register themselves as extensions.
1983 // 3. The generic directive parser implemented by this class. These are
1984 // all the directives that behave in a target and platform independent
1985 // manner, or at least have a default behavior that's shared between
1986 // all targets and platforms.
1987
1988 getTargetParser().flushPendingInstructions(getStreamer());
1989
1990 SMLoc StartTokLoc = getTok().getLoc();
1991 bool TPDirectiveReturn = getTargetParser().ParseDirective(ID);
1992
1993 if (hasPendingError())
22
Taking false branch
1994 return true;
1995 // Currently the return value should be true if we are
1996 // uninterested but as this is at odds with the standard parsing
1997 // convention (return true = error) we have instances of a parsed
1998 // directive that fails returning true as an error. Catch these
1999 // cases as best as possible errors here.
2000 if (TPDirectiveReturn && StartTokLoc != getTok().getLoc())
23
Assuming 'TPDirectiveReturn' is true
24
Taking false branch
2001 return true;
2002 // Return if we did some parsing or believe we succeeded.
2003 if (!TPDirectiveReturn
24.1
'TPDirectiveReturn' is true
24.1
'TPDirectiveReturn' is true
24.1
'TPDirectiveReturn' is true
|| StartTokLoc != getTok().getLoc())
25
Taking false branch
2004 return false;
2005
2006 // Next, check the extension directive map to see if any extension has
2007 // registered itself to parse this directive.
2008 std::pair<MCAsmParserExtension *, DirectiveHandler> Handler =
2009 ExtensionDirectiveMap.lookup(IDVal);
2010 if (Handler.first)
26
Assuming field 'first' is null
27
Taking false branch
2011 return (*Handler.second)(Handler.first, IDVal, IDLoc);
2012
2013 // Finally, if no one else is interested in this directive, it must be
2014 // generic and familiar to this class.
2015 switch (DirKind) {
28
Control jumps to 'case DK_PSEUDO_PROBE:' at line 2276
2016 default:
2017 break;
2018 case DK_SET:
2019 case DK_EQU:
2020 return parseDirectiveSet(IDVal, true);
2021 case DK_EQUIV:
2022 return parseDirectiveSet(IDVal, false);
2023 case DK_ASCII:
2024 return parseDirectiveAscii(IDVal, false);
2025 case DK_ASCIZ:
2026 case DK_STRING:
2027 return parseDirectiveAscii(IDVal, true);
2028 case DK_BYTE:
2029 case DK_DC_B:
2030 return parseDirectiveValue(IDVal, 1);
2031 case DK_DC:
2032 case DK_DC_W:
2033 case DK_SHORT:
2034 case DK_VALUE:
2035 case DK_2BYTE:
2036 return parseDirectiveValue(IDVal, 2);
2037 case DK_LONG:
2038 case DK_INT:
2039 case DK_4BYTE:
2040 case DK_DC_L:
2041 return parseDirectiveValue(IDVal, 4);
2042 case DK_QUAD:
2043 case DK_8BYTE:
2044 return parseDirectiveValue(IDVal, 8);
2045 case DK_DC_A:
2046 return parseDirectiveValue(
2047 IDVal, getContext().getAsmInfo()->getCodePointerSize());
2048 case DK_OCTA:
2049 return parseDirectiveOctaValue(IDVal);
2050 case DK_SINGLE:
2051 case DK_FLOAT:
2052 case DK_DC_S:
2053 return parseDirectiveRealValue(IDVal, APFloat::IEEEsingle());
2054 case DK_DOUBLE:
2055 case DK_DC_D:
2056 return parseDirectiveRealValue(IDVal, APFloat::IEEEdouble());
2057 case DK_ALIGN: {
2058 bool IsPow2 = !getContext().getAsmInfo()->getAlignmentIsInBytes();
2059 return parseDirectiveAlign(IsPow2, /*ExprSize=*/1);
2060 }
2061 case DK_ALIGN32: {
2062 bool IsPow2 = !getContext().getAsmInfo()->getAlignmentIsInBytes();
2063 return parseDirectiveAlign(IsPow2, /*ExprSize=*/4);
2064 }
2065 case DK_BALIGN:
2066 return parseDirectiveAlign(/*IsPow2=*/false, /*ExprSize=*/1);
2067 case DK_BALIGNW:
2068 return parseDirectiveAlign(/*IsPow2=*/false, /*ExprSize=*/2);
2069 case DK_BALIGNL:
2070 return parseDirectiveAlign(/*IsPow2=*/false, /*ExprSize=*/4);
2071 case DK_P2ALIGN:
2072 return parseDirectiveAlign(/*IsPow2=*/true, /*ExprSize=*/1);
2073 case DK_P2ALIGNW:
2074 return parseDirectiveAlign(/*IsPow2=*/true, /*ExprSize=*/2);
2075 case DK_P2ALIGNL:
2076 return parseDirectiveAlign(/*IsPow2=*/true, /*ExprSize=*/4);
2077 case DK_ORG:
2078 return parseDirectiveOrg();
2079 case DK_FILL:
2080 return parseDirectiveFill();
2081 case DK_ZERO:
2082 return parseDirectiveZero();
2083 case DK_EXTERN:
2084 eatToEndOfStatement(); // .extern is the default, ignore it.
2085 return false;
2086 case DK_GLOBL:
2087 case DK_GLOBAL:
2088 return parseDirectiveSymbolAttribute(MCSA_Global);
2089 case DK_LAZY_REFERENCE:
2090 return parseDirectiveSymbolAttribute(MCSA_LazyReference);
2091 case DK_NO_DEAD_STRIP:
2092 return parseDirectiveSymbolAttribute(MCSA_NoDeadStrip);
2093 case DK_SYMBOL_RESOLVER:
2094 return parseDirectiveSymbolAttribute(MCSA_SymbolResolver);
2095 case DK_PRIVATE_EXTERN:
2096 return parseDirectiveSymbolAttribute(MCSA_PrivateExtern);
2097 case DK_REFERENCE:
2098 return parseDirectiveSymbolAttribute(MCSA_Reference);
2099 case DK_WEAK_DEFINITION:
2100 return parseDirectiveSymbolAttribute(MCSA_WeakDefinition);
2101 case DK_WEAK_REFERENCE:
2102 return parseDirectiveSymbolAttribute(MCSA_WeakReference);
2103 case DK_WEAK_DEF_CAN_BE_HIDDEN:
2104 return parseDirectiveSymbolAttribute(MCSA_WeakDefAutoPrivate);
2105 case DK_COLD:
2106 return parseDirectiveSymbolAttribute(MCSA_Cold);
2107 case DK_COMM:
2108 case DK_COMMON:
2109 return parseDirectiveComm(/*IsLocal=*/false);
2110 case DK_LCOMM:
2111 return parseDirectiveComm(/*IsLocal=*/true);
2112 case DK_ABORT:
2113 return parseDirectiveAbort();
2114 case DK_INCLUDE:
2115 return parseDirectiveInclude();
2116 case DK_INCBIN:
2117 return parseDirectiveIncbin();
2118 case DK_CODE16:
2119 case DK_CODE16GCC:
2120 return TokError(Twine(IDVal) +
2121 " not currently supported for this target");
2122 case DK_REPT:
2123 return parseDirectiveRept(IDLoc, IDVal);
2124 case DK_IRP:
2125 return parseDirectiveIrp(IDLoc);
2126 case DK_IRPC:
2127 return parseDirectiveIrpc(IDLoc);
2128 case DK_ENDR:
2129 return parseDirectiveEndr(IDLoc);
2130 case DK_BUNDLE_ALIGN_MODE:
2131 return parseDirectiveBundleAlignMode();
2132 case DK_BUNDLE_LOCK:
2133 return parseDirectiveBundleLock();
2134 case DK_BUNDLE_UNLOCK:
2135 return parseDirectiveBundleUnlock();
2136 case DK_SLEB128:
2137 return parseDirectiveLEB128(true);
2138 case DK_ULEB128:
2139 return parseDirectiveLEB128(false);
2140 case DK_SPACE:
2141 case DK_SKIP:
2142 return parseDirectiveSpace(IDVal);
2143 case DK_FILE:
2144 return parseDirectiveFile(IDLoc);
2145 case DK_LINE:
2146 return parseDirectiveLine();
2147 case DK_LOC:
2148 return parseDirectiveLoc();
2149 case DK_STABS:
2150 return parseDirectiveStabs();
2151 case DK_CV_FILE:
2152 return parseDirectiveCVFile();
2153 case DK_CV_FUNC_ID:
2154 return parseDirectiveCVFuncId();
2155 case DK_CV_INLINE_SITE_ID:
2156 return parseDirectiveCVInlineSiteId();
2157 case DK_CV_LOC:
2158 return parseDirectiveCVLoc();
2159 case DK_CV_LINETABLE:
2160 return parseDirectiveCVLinetable();
2161 case DK_CV_INLINE_LINETABLE:
2162 return parseDirectiveCVInlineLinetable();
2163 case DK_CV_DEF_RANGE:
2164 return parseDirectiveCVDefRange();
2165 case DK_CV_STRING:
2166 return parseDirectiveCVString();
2167 case DK_CV_STRINGTABLE:
2168 return parseDirectiveCVStringTable();
2169 case DK_CV_FILECHECKSUMS:
2170 return parseDirectiveCVFileChecksums();
2171 case DK_CV_FILECHECKSUM_OFFSET:
2172 return parseDirectiveCVFileChecksumOffset();
2173 case DK_CV_FPO_DATA:
2174 return parseDirectiveCVFPOData();
2175 case DK_CFI_SECTIONS:
2176 return parseDirectiveCFISections();
2177 case DK_CFI_STARTPROC:
2178 return parseDirectiveCFIStartProc();
2179 case DK_CFI_ENDPROC:
2180 return parseDirectiveCFIEndProc();
2181 case DK_CFI_DEF_CFA:
2182 return parseDirectiveCFIDefCfa(IDLoc);
2183 case DK_CFI_DEF_CFA_OFFSET:
2184 return parseDirectiveCFIDefCfaOffset();
2185 case DK_CFI_ADJUST_CFA_OFFSET:
2186 return parseDirectiveCFIAdjustCfaOffset();
2187 case DK_CFI_DEF_CFA_REGISTER:
2188 return parseDirectiveCFIDefCfaRegister(IDLoc);
2189 case DK_CFI_OFFSET:
2190 return parseDirectiveCFIOffset(IDLoc);
2191 case DK_CFI_REL_OFFSET:
2192 return parseDirectiveCFIRelOffset(IDLoc);
2193 case DK_CFI_PERSONALITY:
2194 return parseDirectiveCFIPersonalityOrLsda(true);
2195 case DK_CFI_LSDA:
2196 return parseDirectiveCFIPersonalityOrLsda(false);
2197 case DK_CFI_REMEMBER_STATE:
2198 return parseDirectiveCFIRememberState();
2199 case DK_CFI_RESTORE_STATE:
2200 return parseDirectiveCFIRestoreState();
2201 case DK_CFI_SAME_VALUE:
2202 return parseDirectiveCFISameValue(IDLoc);
2203 case DK_CFI_RESTORE:
2204 return parseDirectiveCFIRestore(IDLoc);
2205 case DK_CFI_ESCAPE:
2206 return parseDirectiveCFIEscape();
2207 case DK_CFI_RETURN_COLUMN:
2208 return parseDirectiveCFIReturnColumn(IDLoc);
2209 case DK_CFI_SIGNAL_FRAME:
2210 return parseDirectiveCFISignalFrame();
2211 case DK_CFI_UNDEFINED:
2212 return parseDirectiveCFIUndefined(IDLoc);
2213 case DK_CFI_REGISTER:
2214 return parseDirectiveCFIRegister(IDLoc);
2215 case DK_CFI_WINDOW_SAVE:
2216 return parseDirectiveCFIWindowSave();
2217 case DK_MACROS_ON:
2218 case DK_MACROS_OFF:
2219 return parseDirectiveMacrosOnOff(IDVal);
2220 case DK_MACRO:
2221 return parseDirectiveMacro(IDLoc);
2222 case DK_ALTMACRO:
2223 case DK_NOALTMACRO:
2224 return parseDirectiveAltmacro(IDVal);
2225 case DK_EXITM:
2226 return parseDirectiveExitMacro(IDVal);
2227 case DK_ENDM:
2228 case DK_ENDMACRO:
2229 return parseDirectiveEndMacro(IDVal);
2230 case DK_PURGEM:
2231 return parseDirectivePurgeMacro(IDLoc);
2232 case DK_END:
2233 return parseDirectiveEnd(IDLoc);
2234 case DK_ERR:
2235 return parseDirectiveError(IDLoc, false);
2236 case DK_ERROR:
2237 return parseDirectiveError(IDLoc, true);
2238 case DK_WARNING:
2239 return parseDirectiveWarning(IDLoc);
2240 case DK_RELOC:
2241 return parseDirectiveReloc(IDLoc);
2242 case DK_DCB:
2243 case DK_DCB_W:
2244 return parseDirectiveDCB(IDVal, 2);
2245 case DK_DCB_B:
2246 return parseDirectiveDCB(IDVal, 1);
2247 case DK_DCB_D:
2248 return parseDirectiveRealDCB(IDVal, APFloat::IEEEdouble());
2249 case DK_DCB_L:
2250 return parseDirectiveDCB(IDVal, 4);
2251 case DK_DCB_S:
2252 return parseDirectiveRealDCB(IDVal, APFloat::IEEEsingle());
2253 case DK_DC_X:
2254 case DK_DCB_X:
2255 return TokError(Twine(IDVal) +
2256 " not currently supported for this target");
2257 case DK_DS:
2258 case DK_DS_W:
2259 return parseDirectiveDS(IDVal, 2);
2260 case DK_DS_B:
2261 return parseDirectiveDS(IDVal, 1);
2262 case DK_DS_D:
2263 return parseDirectiveDS(IDVal, 8);
2264 case DK_DS_L:
2265 case DK_DS_S:
2266 return parseDirectiveDS(IDVal, 4);
2267 case DK_DS_P:
2268 case DK_DS_X:
2269 return parseDirectiveDS(IDVal, 12);
2270 case DK_PRINT:
2271 return parseDirectivePrint(IDLoc);
2272 case DK_ADDRSIG:
2273 return parseDirectiveAddrsig();
2274 case DK_ADDRSIG_SYM:
2275 return parseDirectiveAddrsigSym();
2276 case DK_PSEUDO_PROBE:
2277 return parseDirectivePseudoProbe();
29
Calling 'AsmParser::parseDirectivePseudoProbe'
2278 case DK_LTO_DISCARD:
2279 return parseDirectiveLTODiscard();
2280 }
2281
2282 return Error(IDLoc, "unknown directive");
2283 }
2284
2285 // __asm _emit or __asm __emit
2286 if (ParsingMSInlineAsm && (IDVal == "_emit" || IDVal == "__emit" ||
2287 IDVal == "_EMIT" || IDVal == "__EMIT"))
2288 return parseDirectiveMSEmit(IDLoc, Info, IDVal.size());
2289
2290 // __asm align
2291 if (ParsingMSInlineAsm && (IDVal == "align" || IDVal == "ALIGN"))
2292 return parseDirectiveMSAlign(IDLoc, Info);
2293
2294 if (ParsingMSInlineAsm && (IDVal == "even" || IDVal == "EVEN"))
2295 Info.AsmRewrites->emplace_back(AOK_EVEN, IDLoc, 4);
2296 if (checkForValidSection())
2297 return true;
2298
2299 return parseAndMatchAndEmitTargetInstruction(Info, IDVal, ID, IDLoc);
2300}
2301
2302bool AsmParser::parseAndMatchAndEmitTargetInstruction(ParseStatementInfo &Info,
2303 StringRef IDVal,
2304 AsmToken ID,
2305 SMLoc IDLoc) {
2306 // Canonicalize the opcode to lower case.
2307 std::string OpcodeStr = IDVal.lower();
2308 ParseInstructionInfo IInfo(Info.AsmRewrites);
2309 bool ParseHadError = getTargetParser().ParseInstruction(IInfo, OpcodeStr, ID,
2310 Info.ParsedOperands);
2311 Info.ParseError = ParseHadError;
2312
2313 // Dump the parsed representation, if requested.
2314 if (getShowParsedOperands()) {
2315 SmallString<256> Str;
2316 raw_svector_ostream OS(Str);
2317 OS << "parsed instruction: [";
2318 for (unsigned i = 0; i != Info.ParsedOperands.size(); ++i) {
2319 if (i != 0)
2320 OS << ", ";
2321 Info.ParsedOperands[i]->print(OS);
2322 }
2323 OS << "]";
2324
2325 printMessage(IDLoc, SourceMgr::DK_Note, OS.str());
2326 }
2327
2328 // Fail even if ParseInstruction erroneously returns false.
2329 if (hasPendingError() || ParseHadError)
2330 return true;
2331
2332 // If we are generating dwarf for the current section then generate a .loc
2333 // directive for the instruction.
2334 if (!ParseHadError && enabledGenDwarfForAssembly() &&
2335 getContext().getGenDwarfSectionSyms().count(
2336 getStreamer().getCurrentSectionOnly())) {
2337 unsigned Line;
2338 if (ActiveMacros.empty())
2339 Line = SrcMgr.FindLineNumber(IDLoc, CurBuffer);
2340 else
2341 Line = SrcMgr.FindLineNumber(ActiveMacros.front()->InstantiationLoc,
2342 ActiveMacros.front()->ExitBuffer);
2343
2344 // If we previously parsed a cpp hash file line comment then make sure the
2345 // current Dwarf File is for the CppHashFilename if not then emit the
2346 // Dwarf File table for it and adjust the line number for the .loc.
2347 if (!CppHashInfo.Filename.empty()) {
2348 unsigned FileNumber = getStreamer().emitDwarfFileDirective(
2349 0, StringRef(), CppHashInfo.Filename);
2350 getContext().setGenDwarfFileNumber(FileNumber);
2351
2352 unsigned CppHashLocLineNo =
2353 SrcMgr.FindLineNumber(CppHashInfo.Loc, CppHashInfo.Buf);
2354 Line = CppHashInfo.LineNumber - 1 + (Line - CppHashLocLineNo);
2355 }
2356
2357 getStreamer().emitDwarfLocDirective(
2358 getContext().getGenDwarfFileNumber(), Line, 0,
2359 DWARF2_LINE_DEFAULT_IS_STMT1 ? DWARF2_FLAG_IS_STMT(1 << 0) : 0, 0, 0,
2360 StringRef());
2361 }
2362
2363 // If parsing succeeded, match the instruction.
2364 if (!ParseHadError) {
2365 uint64_t ErrorInfo;
2366 if (getTargetParser().MatchAndEmitInstruction(
2367 IDLoc, Info.Opcode, Info.ParsedOperands, Out, ErrorInfo,
2368 getTargetParser().isParsingMSInlineAsm()))
2369 return true;
2370 }
2371 return false;
2372}
2373
2374// Parse and erase curly braces marking block start/end
2375bool
2376AsmParser::parseCurlyBlockScope(SmallVectorImpl<AsmRewrite> &AsmStrRewrites) {
2377 // Identify curly brace marking block start/end
2378 if (Lexer.isNot(AsmToken::LCurly) && Lexer.isNot(AsmToken::RCurly))
2379 return false;
2380
2381 SMLoc StartLoc = Lexer.getLoc();
2382 Lex(); // Eat the brace
2383 if (Lexer.is(AsmToken::EndOfStatement))
2384 Lex(); // Eat EndOfStatement following the brace
2385
2386 // Erase the block start/end brace from the output asm string
2387 AsmStrRewrites.emplace_back(AOK_Skip, StartLoc, Lexer.getLoc().getPointer() -
2388 StartLoc.getPointer());
2389 return true;
2390}
2391
2392/// parseCppHashLineFilenameComment as this:
2393/// ::= # number "filename"
2394bool AsmParser::parseCppHashLineFilenameComment(SMLoc L, bool SaveLocInfo) {
2395 Lex(); // Eat the hash token.
2396 // Lexer only ever emits HashDirective if it fully formed if it's
2397 // done the checking already so this is an internal error.
2398 assert(getTok().is(AsmToken::Integer) &&(static_cast <bool> (getTok().is(AsmToken::Integer) &&
"Lexing Cpp line comment: Expected Integer") ? void (0) : __assert_fail
("getTok().is(AsmToken::Integer) && \"Lexing Cpp line comment: Expected Integer\""
, "/build/llvm-toolchain-snapshot-13~++20210613111130+5be314f79ba7/llvm/lib/MC/MCParser/AsmParser.cpp"
, 2399, __extension__ __PRETTY_FUNCTION__))
2399 "Lexing Cpp line comment: Expected Integer")(static_cast <bool> (getTok().is(AsmToken::Integer) &&
"Lexing Cpp line comment: Expected Integer") ? void (0) : __assert_fail
("getTok().is(AsmToken::Integer) && \"Lexing Cpp line comment: Expected Integer\""
, "/build/llvm-toolchain-snapshot-13~++20210613111130+5be314f79ba7/llvm/lib/MC/MCParser/AsmParser.cpp"
, 2399, __extension__ __PRETTY_FUNCTION__))
;
2400 int64_t LineNumber = getTok().getIntVal();
2401 Lex();
2402 assert(getTok().is(AsmToken::String) &&(static_cast <bool> (getTok().is(AsmToken::String) &&
"Lexing Cpp line comment: Expected String") ? void (0) : __assert_fail
("getTok().is(AsmToken::String) && \"Lexing Cpp line comment: Expected String\""
, "/build/llvm-toolchain-snapshot-13~++20210613111130+5be314f79ba7/llvm/lib/MC/MCParser/AsmParser.cpp"
, 2403, __extension__ __PRETTY_FUNCTION__))
2403 "Lexing Cpp line comment: Expected String")(static_cast <bool> (getTok().is(AsmToken::String) &&
"Lexing Cpp line comment: Expected String") ? void (0) : __assert_fail
("getTok().is(AsmToken::String) && \"Lexing Cpp line comment: Expected String\""
, "/build/llvm-toolchain-snapshot-13~++20210613111130+5be314f79ba7/llvm/lib/MC/MCParser/AsmParser.cpp"
, 2403, __extension__ __PRETTY_FUNCTION__))
;
2404 StringRef Filename = getTok().getString();
2405 Lex();
2406
2407 if (!SaveLocInfo)
2408 return false;
2409
2410 // Get rid of the enclosing quotes.
2411 Filename = Filename.substr(1, Filename.size() - 2);
2412
2413 // Save the SMLoc, Filename and LineNumber for later use by diagnostics
2414 // and possibly DWARF file info.
2415 CppHashInfo.Loc = L;
2416 CppHashInfo.Filename = Filename;
2417 CppHashInfo.LineNumber = LineNumber;
2418 CppHashInfo.Buf = CurBuffer;
2419 if (FirstCppHashFilename.empty())
2420 FirstCppHashFilename = Filename;
2421 return false;
2422}
2423
2424/// will use the last parsed cpp hash line filename comment
2425/// for the Filename and LineNo if any in the diagnostic.
2426void AsmParser::DiagHandler(const SMDiagnostic &Diag, void *Context) {
2427 auto *Parser = static_cast<AsmParser *>(Context);
2428 raw_ostream &OS = errs();
2429
2430 const SourceMgr &DiagSrcMgr = *Diag.getSourceMgr();
2431 SMLoc DiagLoc = Diag.getLoc();
2432 unsigned DiagBuf = DiagSrcMgr.FindBufferContainingLoc(DiagLoc);
2433 unsigned CppHashBuf =
2434 Parser->SrcMgr.FindBufferContainingLoc(Parser->CppHashInfo.Loc);
2435
2436 // Like SourceMgr::printMessage() we need to print the include stack if any
2437 // before printing the message.
2438 unsigned DiagCurBuffer = DiagSrcMgr.FindBufferContainingLoc(DiagLoc);
2439 if (!Parser->SavedDiagHandler && DiagCurBuffer &&
2440 DiagCurBuffer != DiagSrcMgr.getMainFileID()) {
2441 SMLoc ParentIncludeLoc = DiagSrcMgr.getParentIncludeLoc(DiagCurBuffer);
2442 DiagSrcMgr.PrintIncludeStack(ParentIncludeLoc, OS);
2443 }
2444
2445 // If we have not parsed a cpp hash line filename comment or the source
2446 // manager changed or buffer changed (like in a nested include) then just
2447 // print the normal diagnostic using its Filename and LineNo.
2448 if (!Parser->CppHashInfo.LineNumber || DiagBuf != CppHashBuf) {
2449 if (Parser->SavedDiagHandler)
2450 Parser->SavedDiagHandler(Diag, Parser->SavedDiagContext);
2451 else
2452 Parser->getContext().diagnose(Diag);
2453 return;
2454 }
2455
2456 // Use the CppHashFilename and calculate a line number based on the
2457 // CppHashInfo.Loc and CppHashInfo.LineNumber relative to this Diag's SMLoc
2458 // for the diagnostic.
2459 const std::string &Filename = std::string(Parser->CppHashInfo.Filename);
2460
2461 int DiagLocLineNo = DiagSrcMgr.FindLineNumber(DiagLoc, DiagBuf);
2462 int CppHashLocLineNo =
2463 Parser->SrcMgr.FindLineNumber(Parser->CppHashInfo.Loc, CppHashBuf);
2464 int LineNo =
2465 Parser->CppHashInfo.LineNumber - 1 + (DiagLocLineNo - CppHashLocLineNo);
2466
2467 SMDiagnostic NewDiag(*Diag.getSourceMgr(), Diag.getLoc(), Filename, LineNo,
2468 Diag.getColumnNo(), Diag.getKind(), Diag.getMessage(),
2469 Diag.getLineContents(), Diag.getRanges());
2470
2471 if (Parser->SavedDiagHandler)
2472 Parser->SavedDiagHandler(Diag, Parser->SavedDiagContext);
2473 else
2474 Parser->getContext().diagnose(NewDiag);
2475}
2476
2477// FIXME: This is mostly duplicated from the function in AsmLexer.cpp. The
2478// difference being that that function accepts '@' as part of identifiers and
2479// we can't do that. AsmLexer.cpp should probably be changed to handle
2480// '@' as a special case when needed.
2481static bool isIdentifierChar(char c) {
2482 return isalnum(static_cast<unsigned char>(c)) || c == '_' || c == '$' ||
2483 c == '.';
2484}
2485
2486bool AsmParser::expandMacro(raw_svector_ostream &OS, StringRef Body,
2487 ArrayRef<MCAsmMacroParameter> Parameters,
2488 ArrayRef<MCAsmMacroArgument> A,
2489 bool EnableAtPseudoVariable, SMLoc L) {
2490 unsigned NParameters = Parameters.size();
2491 bool HasVararg = NParameters ? Parameters.back().Vararg : false;
2492 if ((!IsDarwin || NParameters != 0) && NParameters != A.size())
2493 return Error(L, "Wrong number of arguments");
2494
2495 // A macro without parameters is handled differently on Darwin:
2496 // gas accepts no arguments and does no substitutions
2497 while (!Body.empty()) {
2498 // Scan for the next substitution.
2499 std::size_t End = Body.size(), Pos = 0;
2500 for (; Pos != End; ++Pos) {
2501 // Check for a substitution or escape.
2502 if (IsDarwin && !NParameters) {
2503 // This macro has no parameters, look for $0, $1, etc.
2504 if (Body[Pos] != '$' || Pos + 1 == End)
2505 continue;
2506
2507 char Next = Body[Pos + 1];
2508 if (Next == '$' || Next == 'n' ||
2509 isdigit(static_cast<unsigned char>(Next)))
2510 break;
2511 } else {
2512 // This macro has parameters, look for \foo, \bar, etc.
2513 if (Body[Pos] == '\\' && Pos + 1 != End)
2514 break;
2515 }
2516 }
2517
2518 // Add the prefix.
2519 OS << Body.slice(0, Pos);
2520
2521 // Check if we reached the end.
2522 if (Pos == End)
2523 break;
2524
2525 if (IsDarwin && !NParameters) {
2526 switch (Body[Pos + 1]) {
2527 // $$ => $
2528 case '$':
2529 OS << '$';
2530 break;
2531
2532 // $n => number of arguments
2533 case 'n':
2534 OS << A.size();
2535 break;
2536
2537 // $[0-9] => argument
2538 default: {
2539 // Missing arguments are ignored.
2540 unsigned Index = Body[Pos + 1] - '0';
2541 if (Index >= A.size())
2542 break;
2543
2544 // Otherwise substitute with the token values, with spaces eliminated.
2545 for (const AsmToken &Token : A[Index])
2546 OS << Token.getString();
2547 break;
2548 }
2549 }
2550 Pos += 2;
2551 } else {
2552 unsigned I = Pos + 1;
2553
2554 // Check for the \@ pseudo-variable.
2555 if (EnableAtPseudoVariable && Body[I] == '@' && I + 1 != End)
2556 ++I;
2557 else
2558 while (isIdentifierChar(Body[I]) && I + 1 != End)
2559 ++I;
2560
2561 const char *Begin = Body.data() + Pos + 1;
2562 StringRef Argument(Begin, I - (Pos + 1));
2563 unsigned Index = 0;
2564
2565 if (Argument == "@") {
2566 OS << NumOfMacroInstantiations;
2567 Pos += 2;
2568 } else {
2569 for (; Index < NParameters; ++Index)
2570 if (Parameters[Index].Name == Argument)
2571 break;
2572
2573 if (Index == NParameters) {
2574 if (Body[Pos + 1] == '(' && Body[Pos + 2] == ')')
2575 Pos += 3;
2576 else {
2577 OS << '\\' << Argument;
2578 Pos = I;
2579 }
2580 } else {
2581 bool VarargParameter = HasVararg && Index == (NParameters - 1);
2582 for (const AsmToken &Token : A[Index])
2583 // For altmacro mode, you can write '%expr'.
2584 // The prefix '%' evaluates the expression 'expr'
2585 // and uses the result as a string (e.g. replace %(1+2) with the
2586 // string "3").
2587 // Here, we identify the integer token which is the result of the
2588 // absolute expression evaluation and replace it with its string
2589 // representation.
2590 if (AltMacroMode && Token.getString().front() == '%' &&
2591 Token.is(AsmToken::Integer))
2592 // Emit an integer value to the buffer.
2593 OS << Token.getIntVal();
2594 // Only Token that was validated as a string and begins with '<'
2595 // is considered altMacroString!!!
2596 else if (AltMacroMode && Token.getString().front() == '<' &&
2597 Token.is(AsmToken::String)) {
2598 OS << angleBracketString(Token.getStringContents());
2599 }
2600 // We expect no quotes around the string's contents when
2601 // parsing for varargs.
2602 else if (Token.isNot(AsmToken::String) || VarargParameter)
2603 OS << Token.getString();
2604 else
2605 OS << Token.getStringContents();
2606
2607 Pos += 1 + Argument.size();
2608 }
2609 }
2610 }
2611 // Update the scan point.
2612 Body = Body.substr(Pos);
2613 }
2614
2615 return false;
2616}
2617
2618static bool isOperator(AsmToken::TokenKind kind) {
2619 switch (kind) {
2620 default:
2621 return false;
2622 case AsmToken::Plus:
2623 case AsmToken::Minus:
2624 case AsmToken::Tilde:
2625 case AsmToken::Slash:
2626 case AsmToken::Star:
2627 case AsmToken::Dot:
2628 case AsmToken::Equal:
2629 case AsmToken::EqualEqual:
2630 case AsmToken::Pipe:
2631 case AsmToken::PipePipe:
2632 case AsmToken::Caret:
2633 case AsmToken::Amp:
2634 case AsmToken::AmpAmp:
2635 case AsmToken::Exclaim:
2636 case AsmToken::ExclaimEqual:
2637 case AsmToken::Less:
2638 case AsmToken::LessEqual:
2639 case AsmToken::LessLess:
2640 case AsmToken::LessGreater:
2641 case AsmToken::Greater:
2642 case AsmToken::GreaterEqual:
2643 case AsmToken::GreaterGreater:
2644 return true;
2645 }
2646}
2647
2648namespace {
2649
2650class AsmLexerSkipSpaceRAII {
2651public:
2652 AsmLexerSkipSpaceRAII(AsmLexer &Lexer, bool SkipSpace) : Lexer(Lexer) {
2653 Lexer.setSkipSpace(SkipSpace);
2654 }
2655
2656 ~AsmLexerSkipSpaceRAII() {
2657 Lexer.setSkipSpace(true);
2658 }
2659
2660private:
2661 AsmLexer &Lexer;
2662};
2663
2664} // end anonymous namespace
2665
2666bool AsmParser::parseMacroArgument(MCAsmMacroArgument &MA, bool Vararg) {
2667
2668 if (Vararg) {
2669 if (Lexer.isNot(AsmToken::EndOfStatement)) {
2670 StringRef Str = parseStringToEndOfStatement();
2671 MA.emplace_back(AsmToken::String, Str);
2672 }
2673 return false;
2674 }
2675
2676 unsigned ParenLevel = 0;
2677
2678 // Darwin doesn't use spaces to delmit arguments.
2679 AsmLexerSkipSpaceRAII ScopedSkipSpace(Lexer, IsDarwin);
2680
2681 bool SpaceEaten;
2682
2683 while (true) {
2684 SpaceEaten = false;
2685 if (Lexer.is(AsmToken::Eof) || Lexer.is(AsmToken::Equal))
2686 return TokError("unexpected token in macro instantiation");
2687
2688 if (ParenLevel == 0) {
2689
2690 if (Lexer.is(AsmToken::Comma))
2691 break;
2692
2693 if (Lexer.is(AsmToken::Space)) {
2694 SpaceEaten = true;
2695 Lexer.Lex(); // Eat spaces
2696 }
2697
2698 // Spaces can delimit parameters, but could also be part an expression.
2699 // If the token after a space is an operator, add the token and the next
2700 // one into this argument
2701 if (!IsDarwin) {
2702 if (isOperator(Lexer.getKind())) {
2703 MA.push_back(getTok());
2704 Lexer.Lex();
2705
2706 // Whitespace after an operator can be ignored.
2707 if (Lexer.is(AsmToken::Space))
2708 Lexer.Lex();
2709
2710 continue;
2711 }
2712 }
2713 if (SpaceEaten)
2714 break;
2715 }
2716
2717 // handleMacroEntry relies on not advancing the lexer here
2718 // to be able to fill in the remaining default parameter values
2719 if (Lexer.is(AsmToken::EndOfStatement))
2720 break;
2721
2722 // Adjust the current parentheses level.
2723 if (Lexer.is(AsmToken::LParen))
2724 ++ParenLevel;
2725 else if (Lexer.is(AsmToken::RParen) && ParenLevel)
2726 --ParenLevel;
2727
2728 // Append the token to the current argument list.
2729 MA.push_back(getTok());
2730 Lexer.Lex();
2731 }
2732
2733 if (ParenLevel != 0)
2734 return TokError("unbalanced parentheses in macro argument");
2735 return false;
2736}
2737
2738// Parse the macro instantiation arguments.
2739bool AsmParser::parseMacroArguments(const MCAsmMacro *M,
2740 MCAsmMacroArguments &A) {
2741 const unsigned NParameters = M ? M->Parameters.size() : 0;
2742 bool NamedParametersFound = false;
2743 SmallVector<SMLoc, 4> FALocs;
2744
2745 A.resize(NParameters);
2746 FALocs.resize(NParameters);
2747
2748 // Parse two kinds of macro invocations:
2749 // - macros defined without any parameters accept an arbitrary number of them
2750 // - macros defined with parameters accept at most that many of them
2751 bool HasVararg = NParameters ? M->Parameters.back().Vararg : false;
2752 for (unsigned Parameter = 0; !NParameters || Parameter < NParameters;
2753 ++Parameter) {
2754 SMLoc IDLoc = Lexer.getLoc();
2755 MCAsmMacroParameter FA;
2756
2757 if (Lexer.is(AsmToken::Identifier) && Lexer.peekTok().is(AsmToken::Equal)) {
2758 if (parseIdentifier(FA.Name))
2759 return Error(IDLoc, "invalid argument identifier for formal argument");
2760
2761 if (Lexer.isNot(AsmToken::Equal))
2762 return TokError("expected '=' after formal parameter identifier");
2763
2764 Lex();
2765
2766 NamedParametersFound = true;
2767 }
2768 bool Vararg = HasVararg && Parameter == (NParameters - 1);
2769
2770 if (NamedParametersFound && FA.Name.empty())
2771 return Error(IDLoc, "cannot mix positional and keyword arguments");
2772
2773 SMLoc StrLoc = Lexer.getLoc();
2774 SMLoc EndLoc;
2775 if (AltMacroMode && Lexer.is(AsmToken::Percent)) {
2776 const MCExpr *AbsoluteExp;
2777 int64_t Value;
2778 /// Eat '%'
2779 Lex();
2780 if (parseExpression(AbsoluteExp, EndLoc))
2781 return false;
2782 if (!AbsoluteExp->evaluateAsAbsolute(Value,
2783 getStreamer().getAssemblerPtr()))
2784 return Error(StrLoc, "expected absolute expression");
2785 const char *StrChar = StrLoc.getPointer();
2786 const char *EndChar = EndLoc.getPointer();
2787 AsmToken newToken(AsmToken::Integer,
2788 StringRef(StrChar, EndChar - StrChar), Value);
2789 FA.Value.push_back(newToken);
2790 } else if (AltMacroMode && Lexer.is(AsmToken::Less) &&
2791 isAngleBracketString(StrLoc, EndLoc)) {
2792 const char *StrChar = StrLoc.getPointer();
2793 const char *EndChar = EndLoc.getPointer();
2794 jumpToLoc(EndLoc, CurBuffer);
2795 /// Eat from '<' to '>'
2796 Lex();
2797 AsmToken newToken(AsmToken::String,
2798 StringRef(StrChar, EndChar - StrChar));
2799 FA.Value.push_back(newToken);
2800 } else if(parseMacroArgument(FA.Value, Vararg))
2801 return true;
2802
2803 unsigned PI = Parameter;
2804 if (!FA.Name.empty()) {
2805 unsigned FAI = 0;
2806 for (FAI = 0; FAI < NParameters; ++FAI)
2807 if (M->Parameters[FAI].Name == FA.Name)
2808 break;
2809
2810 if (FAI >= NParameters) {
2811 assert(M && "expected macro to be defined")(static_cast <bool> (M && "expected macro to be defined"
) ? void (0) : __assert_fail ("M && \"expected macro to be defined\""
, "/build/llvm-toolchain-snapshot-13~++20210613111130+5be314f79ba7/llvm/lib/MC/MCParser/AsmParser.cpp"
, 2811, __extension__ __PRETTY_FUNCTION__))
;
2812 return Error(IDLoc, "parameter named '" + FA.Name +
2813 "' does not exist for macro '" + M->Name + "'");
2814 }
2815 PI = FAI;
2816 }
2817
2818 if (!FA.Value.empty()) {
2819 if (A.size() <= PI)
2820 A.resize(PI + 1);
2821 A[PI] = FA.Value;
2822
2823 if (FALocs.size() <= PI)
2824 FALocs.resize(PI + 1);
2825
2826 FALocs[PI] = Lexer.getLoc();
2827 }
2828
2829 // At the end of the statement, fill in remaining arguments that have
2830 // default values. If there aren't any, then the next argument is
2831 // required but missing
2832 if (Lexer.is(AsmToken::EndOfStatement)) {
2833 bool Failure = false;
2834 for (unsigned FAI = 0; FAI < NParameters; ++FAI) {
2835 if (A[FAI].empty()) {
2836 if (M->Parameters[FAI].Required) {
2837 Error(FALocs[FAI].isValid() ? FALocs[FAI] : Lexer.getLoc(),
2838 "missing value for required parameter "
2839 "'" + M->Parameters[FAI].Name + "' in macro '" + M->Name + "'");
2840 Failure = true;
2841 }
2842
2843 if (!M->Parameters[FAI].Value.empty())
2844 A[FAI] = M->Parameters[FAI].Value;
2845 }
2846 }
2847 return Failure;
2848 }
2849
2850 if (Lexer.is(AsmToken::Comma))
2851 Lex();
2852 }
2853
2854 return TokError("too many positional arguments");
2855}
2856
2857bool AsmParser::handleMacroEntry(const MCAsmMacro *M, SMLoc NameLoc) {
2858 // Arbitrarily limit macro nesting depth (default matches 'as'). We can
2859 // eliminate this, although we should protect against infinite loops.
2860 unsigned MaxNestingDepth = AsmMacroMaxNestingDepth;
2861 if (ActiveMacros.size() == MaxNestingDepth) {
2862 std::ostringstream MaxNestingDepthError;
2863 MaxNestingDepthError << "macros cannot be nested more than "
2864 << MaxNestingDepth << " levels deep."
2865 << " Use -asm-macro-max-nesting-depth to increase "
2866 "this limit.";
2867 return TokError(MaxNestingDepthError.str());
2868 }
2869
2870 MCAsmMacroArguments A;
2871 if (parseMacroArguments(M, A))
2872 return true;
2873
2874 // Macro instantiation is lexical, unfortunately. We construct a new buffer
2875 // to hold the macro body with substitutions.
2876 SmallString<256> Buf;
2877 StringRef Body = M->Body;
2878 raw_svector_ostream OS(Buf);
2879
2880 if (expandMacro(OS, Body, M->Parameters, A, true, getTok().getLoc()))
2881 return true;
2882
2883 // We include the .endmacro in the buffer as our cue to exit the macro
2884 // instantiation.
2885 OS << ".endmacro\n";
2886
2887 std::unique_ptr<MemoryBuffer> Instantiation =
2888 MemoryBuffer::getMemBufferCopy(OS.str(), "<instantiation>");
2889
2890 // Create the macro instantiation object and add to the current macro
2891 // instantiation stack.
2892 MacroInstantiation *MI = new MacroInstantiation{
2893 NameLoc, CurBuffer, getTok().getLoc(), TheCondStack.size()};
2894 ActiveMacros.push_back(MI);
2895
2896 ++NumOfMacroInstantiations;
2897
2898 // Jump to the macro instantiation and prime the lexer.
2899 CurBuffer = SrcMgr.AddNewSourceBuffer(std::move(Instantiation), SMLoc());
2900 Lexer.setBuffer(SrcMgr.getMemoryBuffer(CurBuffer)->getBuffer());
2901 Lex();
2902
2903 return false;
2904}
2905
2906void AsmParser::handleMacroExit() {
2907 // Jump to the EndOfStatement we should return to, and consume it.
2908 jumpToLoc(ActiveMacros.back()->ExitLoc, ActiveMacros.back()->ExitBuffer);
2909 Lex();
2910
2911 // Pop the instantiation entry.
2912 delete ActiveMacros.back();
2913 ActiveMacros.pop_back();
2914}
2915
2916bool AsmParser::parseAssignment(StringRef Name, bool allow_redef,
2917 bool NoDeadStrip) {
2918 MCSymbol *Sym;
2919 const MCExpr *Value;
2920 if (MCParserUtils::parseAssignmentExpression(Name, allow_redef, *this, Sym,
2921 Value))
2922 return true;
2923
2924 if (!Sym) {
2925 // In the case where we parse an expression starting with a '.', we will
2926 // not generate an error, nor will we create a symbol. In this case we
2927 // should just return out.
2928 return false;
2929 }
2930
2931 if (discardLTOSymbol(Name))
2932 return false;
2933
2934 // Do the assignment.
2935 Out.emitAssignment(Sym, Value);
2936 if (NoDeadStrip)
2937 Out.emitSymbolAttribute(Sym, MCSA_NoDeadStrip);
2938
2939 return false;
2940}
2941
2942/// parseIdentifier:
2943/// ::= identifier
2944/// ::= string
2945bool AsmParser::parseIdentifier(StringRef &Res) {
2946 // The assembler has relaxed rules for accepting identifiers, in particular we
2947 // allow things like '.globl $foo' and '.def @feat.00', which would normally be
2948 // separate tokens. At this level, we have already lexed so we cannot (currently)
2949 // handle this as a context dependent token, instead we detect adjacent tokens
2950 // and return the combined identifier.
2951 if (Lexer.is(AsmToken::Dollar) || Lexer.is(AsmToken::At)) {
2952 SMLoc PrefixLoc = getLexer().getLoc();
2953
2954 // Consume the prefix character, and check for a following identifier.
2955
2956 AsmToken Buf[1];
2957 Lexer.peekTokens(Buf, false);
2958
2959 if (Buf[0].isNot(AsmToken::Identifier) && Buf[0].isNot(AsmToken::Integer))
2960 return true;
2961
2962 // We have a '$' or '@' followed by an identifier or integer token, make
2963 // sure they are adjacent.
2964 if (PrefixLoc.getPointer() + 1 != Buf[0].getLoc().getPointer())
2965 return true;
2966
2967 // eat $ or @
2968 Lexer.Lex(); // Lexer's Lex guarantees consecutive token.
2969 // Construct the joined identifier and consume the token.
2970 Res = StringRef(PrefixLoc.getPointer(), getTok().getString().size() + 1);
2971 Lex(); // Parser Lex to maintain invariants.
2972 return false;
2973 }
2974
2975 if (Lexer.isNot(AsmToken::Identifier) && Lexer.isNot(AsmToken::String))
2976 return true;
2977
2978 Res = getTok().getIdentifier();
2979
2980 Lex(); // Consume the identifier token.
2981
2982 return false;
2983}
2984
2985/// parseDirectiveSet:
2986/// ::= .equ identifier ',' expression
2987/// ::= .equiv identifier ',' expression
2988/// ::= .set identifier ',' expression
2989bool AsmParser::parseDirectiveSet(StringRef IDVal, bool allow_redef) {
2990 StringRef Name;
2991 if (check(parseIdentifier(Name), "expected identifier") || parseComma() ||
2992 parseAssignment(Name, allow_redef, true))
2993 return true;
2994 return false;
2995}
2996
2997bool AsmParser::parseEscapedString(std::string &Data) {
2998 if (check(getTok().isNot(AsmToken::String), "expected string"))
2999 return true;
3000
3001 Data = "";
3002 StringRef Str = getTok().getStringContents();
3003 for (unsigned i = 0, e = Str.size(); i != e; ++i) {
3004 if (Str[i] != '\\') {
3005 Data += Str[i];
3006 continue;
3007 }
3008
3009 // Recognize escaped characters. Note that this escape semantics currently
3010 // loosely follows Darwin 'as'.
3011 ++i;
3012 if (i == e)
3013 return TokError("unexpected backslash at end of string");
3014
3015 // Recognize hex sequences similarly to GNU 'as'.
3016 if (Str[i] == 'x' || Str[i] == 'X') {
3017 size_t length = Str.size();
3018 if (i + 1 >= length || !isHexDigit(Str[i + 1]))
3019 return TokError("invalid hexadecimal escape sequence");
3020
3021 // Consume hex characters. GNU 'as' reads all hexadecimal characters and
3022 // then truncates to the lower 16 bits. Seems reasonable.
3023 unsigned Value = 0;
3024 while (i + 1 < length && isHexDigit(Str[i + 1]))
3025 Value = Value * 16 + hexDigitValue(Str[++i]);
3026
3027 Data += (unsigned char)(Value & 0xFF);
3028 continue;
3029 }
3030
3031 // Recognize octal sequences.
3032 if ((unsigned)(Str[i] - '0') <= 7) {
3033 // Consume up to three octal characters.
3034 unsigned Value = Str[i] - '0';
3035
3036 if (i + 1 != e && ((unsigned)(Str[i + 1] - '0')) <= 7) {
3037 ++i;
3038 Value = Value * 8 + (Str[i] - '0');
3039
3040 if (i + 1 != e && ((unsigned)(Str[i + 1] - '0')) <= 7) {
3041 ++i;
3042 Value = Value * 8 + (Str[i] - '0');
3043 }
3044 }
3045
3046 if (Value > 255)
3047 return TokError("invalid octal escape sequence (out of range)");
3048
3049 Data += (unsigned char)Value;
3050 continue;
3051 }
3052
3053 // Otherwise recognize individual escapes.
3054 switch (Str[i]) {
3055 default:
3056 // Just reject invalid escape sequences for now.
3057 return TokError("invalid escape sequence (unrecognized character)");
3058
3059 case 'b': Data += '\b'; break;
3060 case 'f': Data += '\f'; break;
3061 case 'n': Data += '\n'; break;
3062 case 'r': Data += '\r'; break;
3063 case 't': Data += '\t'; break;
3064 case '"': Data += '"'; break;
3065 case '\\': Data += '\\'; break;
3066 }
3067 }
3068
3069 Lex();
3070 return false;
3071}
3072
3073bool AsmParser::parseAngleBracketString(std::string &Data) {
3074 SMLoc EndLoc, StartLoc = getTok().getLoc();
3075 if (isAngleBracketString(StartLoc, EndLoc)) {
3076 const char *StartChar = StartLoc.getPointer() + 1;
3077 const char *EndChar = EndLoc.getPointer() - 1;
3078 jumpToLoc(EndLoc, CurBuffer);
3079 /// Eat from '<' to '>'
3080 Lex();
3081
3082 Data = angleBracketString(StringRef(StartChar, EndChar - StartChar));
3083 return false;
3084 }
3085 return true;
3086}
3087
3088/// parseDirectiveAscii:
3089// ::= .ascii [ "string"+ ( , "string"+ )* ]
3090/// ::= ( .asciz | .string ) [ "string" ( , "string" )* ]
3091bool AsmParser::parseDirectiveAscii(StringRef IDVal, bool ZeroTerminated) {
3092 auto parseOp = [&]() -> bool {
3093 std::string Data;
3094 if (checkForValidSection())
3095 return true;
3096 // Only support spaces as separators for .ascii directive for now. See the
3097 // discusssion at https://reviews.llvm.org/D91460 for more details.
3098 do {
3099 if (parseEscapedString(Data))
3100 return true;
3101 getStreamer().emitBytes(Data);
3102 } while (!ZeroTerminated && getTok().is(AsmToken::String));
3103 if (ZeroTerminated)
3104 getStreamer().emitBytes(StringRef("\0", 1));
3105 return false;
3106 };
3107
3108 return parseMany(parseOp);
3109}
3110
3111/// parseDirectiveReloc
3112/// ::= .reloc expression , identifier [ , expression ]
3113bool AsmParser::parseDirectiveReloc(SMLoc DirectiveLoc) {
3114 const MCExpr *Offset;
3115 const MCExpr *Expr = nullptr;
3116 SMLoc OffsetLoc = Lexer.getTok().getLoc();
3117
3118 if (parseExpression(Offset))
3119 return true;
3120 if (parseComma() ||
3121 check(getTok().isNot(AsmToken::Identifier), "expected relocation name"))
3122 return true;
3123
3124 SMLoc NameLoc = Lexer.getTok().getLoc();
3125 StringRef Name = Lexer.getTok().getIdentifier();
3126 Lex();
3127
3128 if (Lexer.is(AsmToken::Comma)) {
3129 Lex();
3130 SMLoc ExprLoc = Lexer.getLoc();
3131 if (parseExpression(Expr))
3132 return true;
3133
3134 MCValue Value;
3135 if (!Expr->evaluateAsRelocatable(Value, nullptr, nullptr))
3136 return Error(ExprLoc, "expression must be relocatable");
3137 }
3138
3139 if (parseEOL())
3140 return true;
3141
3142 const MCTargetAsmParser &MCT = getTargetParser();
3143 const MCSubtargetInfo &STI = MCT.getSTI();
3144 if (Optional<std::pair<bool, std::string>> Err =
3145 getStreamer().emitRelocDirective(*Offset, Name, Expr, DirectiveLoc,
3146 STI))
3147 return Error(Err->first ? NameLoc : OffsetLoc, Err->second);
3148
3149 return false;
3150}
3151
3152/// parseDirectiveValue
3153/// ::= (.byte | .short | ... ) [ expression (, expression)* ]
3154bool AsmParser::parseDirectiveValue(StringRef IDVal, unsigned Size) {
3155 auto parseOp = [&]() -> bool {
3156 const MCExpr *Value;
3157 SMLoc ExprLoc = getLexer().getLoc();
3158 if (checkForValidSection() || parseExpression(Value))
3159 return true;
3160 // Special case constant expressions to match code generator.
3161 if (const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Value)) {
3162 assert(Size <= 8 && "Invalid size")(static_cast <bool> (Size <= 8 && "Invalid size"
) ? void (0) : __assert_fail ("Size <= 8 && \"Invalid size\""
, "/build/llvm-toolchain-snapshot-13~++20210613111130+5be314f79ba7/llvm/lib/MC/MCParser/AsmParser.cpp"
, 3162, __extension__ __PRETTY_FUNCTION__))
;
3163 uint64_t IntValue = MCE->getValue();
3164 if (!isUIntN(8 * Size, IntValue) && !isIntN(8 * Size, IntValue))
3165 return Error(ExprLoc, "out of range literal value");
3166 getStreamer().emitIntValue(IntValue, Size);
3167 } else
3168 getStreamer().emitValue(Value, Size, ExprLoc);
3169 return false;
3170 };
3171
3172 return parseMany(parseOp);
3173}
3174
3175static bool parseHexOcta(AsmParser &Asm, uint64_t &hi, uint64_t &lo) {
3176 if (Asm.getTok().isNot(AsmToken::Integer) &&
3177 Asm.getTok().isNot(AsmToken::BigNum))
3178 return Asm.TokError("unknown token in expression");
3179 SMLoc ExprLoc = Asm.getTok().getLoc();
3180 APInt IntValue = Asm.getTok().getAPIntVal();
3181 Asm.Lex();
3182 if (!IntValue.isIntN(128))
3183 return Asm.Error(ExprLoc, "out of range literal value");
3184 if (!IntValue.isIntN(64)) {
3185 hi = IntValue.getHiBits(IntValue.getBitWidth() - 64).getZExtValue();
3186 lo = IntValue.getLoBits(64).getZExtValue();
3187 } else {
3188 hi = 0;
3189 lo = IntValue.getZExtValue();
3190 }
3191 return false;
3192}
3193
3194/// ParseDirectiveOctaValue
3195/// ::= .octa [ hexconstant (, hexconstant)* ]
3196
3197bool AsmParser::parseDirectiveOctaValue(StringRef IDVal) {
3198 auto parseOp = [&]() -> bool {
3199 if (checkForValidSection())
3200 return true;
3201 uint64_t hi, lo;
3202 if (parseHexOcta(*this, hi, lo))
3203 return true;
3204 if (MAI.isLittleEndian()) {
3205 getStreamer().emitInt64(lo);
3206 getStreamer().emitInt64(hi);
3207 } else {
3208 getStreamer().emitInt64(hi);
3209 getStreamer().emitInt64(lo);
3210 }
3211 return false;
3212 };
3213
3214 return parseMany(parseOp);
3215}
3216
3217bool AsmParser::parseRealValue(const fltSemantics &Semantics, APInt &Res) {
3218 // We don't truly support arithmetic on floating point expressions, so we
3219 // have to manually parse unary prefixes.
3220 bool IsNeg = false;
3221 if (getLexer().is(AsmToken::Minus)) {
3222 Lexer.Lex();
3223 IsNeg = true;
3224 } else if (getLexer().is(AsmToken::Plus))
3225 Lexer.Lex();
3226
3227 if (Lexer.is(AsmToken::Error))
3228 return TokError(Lexer.getErr());
3229 if (Lexer.isNot(AsmToken::Integer) && Lexer.isNot(AsmToken::Real) &&
3230 Lexer.isNot(AsmToken::Identifier))
3231 return TokError("unexpected token in directive");
3232
3233 // Convert to an APFloat.
3234 APFloat Value(Semantics);
3235 StringRef IDVal = getTok().getString();
3236 if (getLexer().is(AsmToken::Identifier)) {
3237 if (!IDVal.compare_lower("infinity") || !IDVal.compare_lower("inf"))
3238 Value = APFloat::getInf(Semantics);
3239 else if (!IDVal.compare_lower("nan"))
3240 Value = APFloat::getNaN(Semantics, false, ~0);
3241 else
3242 return TokError("invalid floating point literal");
3243 } else if (errorToBool(
3244 Value.convertFromString(IDVal, APFloat::rmNearestTiesToEven)
3245 .takeError()))
3246 return TokError("invalid floating point literal");
3247 if (IsNeg)
3248 Value.changeSign();
3249
3250 // Consume the numeric token.
3251 Lex();
3252
3253 Res = Value.bitcastToAPInt();
3254
3255 return false;
3256}
3257
3258/// parseDirectiveRealValue
3259/// ::= (.single | .double) [ expression (, expression)* ]
3260bool AsmParser::parseDirectiveRealValue(StringRef IDVal,
3261 const fltSemantics &Semantics) {
3262 auto parseOp = [&]() -> bool {
3263 APInt AsInt;
3264 if (checkForValidSection() || parseRealValue(Semantics, AsInt))
3265 return true;
3266 getStreamer().emitIntValue(AsInt.getLimitedValue(),
3267 AsInt.getBitWidth() / 8);
3268 return false;
3269 };
3270
3271 return parseMany(parseOp);
3272}
3273
3274/// parseDirectiveZero
3275/// ::= .zero expression
3276bool AsmParser::parseDirectiveZero() {
3277 SMLoc NumBytesLoc = Lexer.getLoc();
3278 const MCExpr *NumBytes;
3279 if (checkForValidSection() || parseExpression(NumBytes))
3280 return true;
3281
3282 int64_t Val = 0;
3283 if (getLexer().is(AsmToken::Comma)) {
3284 Lex();
3285 if (parseAbsoluteExpression(Val))
3286 return true;
3287 }
3288
3289 if (parseEOL())
3290 return true;
3291 getStreamer().emitFill(*NumBytes, Val, NumBytesLoc);
3292
3293 return false;
3294}
3295
3296/// parseDirectiveFill
3297/// ::= .fill expression [ , expression [ , expression ] ]
3298bool AsmParser::parseDirectiveFill() {
3299 SMLoc NumValuesLoc = Lexer.getLoc();
3300 const MCExpr *NumValues;
3301 if (checkForValidSection() || parseExpression(NumValues))
3302 return true;
3303
3304 int64_t FillSize = 1;
3305 int64_t FillExpr = 0;
3306
3307 SMLoc SizeLoc, ExprLoc;
3308
3309 if (parseOptionalToken(AsmToken::Comma)) {
3310 SizeLoc = getTok().getLoc();
3311 if (parseAbsoluteExpression(FillSize))
3312 return true;
3313 if (parseOptionalToken(AsmToken::Comma)) {
3314 ExprLoc = getTok().getLoc();
3315 if (parseAbsoluteExpression(FillExpr))
3316 return true;
3317 }
3318 }
3319 if (parseEOL())
3320 return true;
3321
3322 if (FillSize < 0) {
3323 Warning(SizeLoc, "'.fill' directive with negative size has no effect");
3324 return false;
3325 }
3326 if (FillSize > 8) {
3327 Warning(SizeLoc, "'.fill' directive with size greater than 8 has been truncated to 8");
3328 FillSize = 8;
3329 }
3330
3331 if (!isUInt<32>(FillExpr) && FillSize > 4)
3332 Warning(ExprLoc, "'.fill' directive pattern has been truncated to 32-bits");
3333
3334 getStreamer().emitFill(*NumValues, FillSize, FillExpr, NumValuesLoc);
3335
3336 return false;
3337}
3338
3339/// parseDirectiveOrg
3340/// ::= .org expression [ , expression ]
3341bool AsmParser::parseDirectiveOrg() {
3342 const MCExpr *Offset;
3343 SMLoc OffsetLoc = Lexer.getLoc();
3344 if (checkForValidSection() || parseExpression(Offset))
3345 return true;
3346
3347 // Parse optional fill expression.
3348 int64_t FillExpr = 0;
3349 if (parseOptionalToken(AsmToken::Comma))
3350 if (parseAbsoluteExpression(FillExpr))
3351 return true;
3352 if (parseEOL())
3353 return true;
3354
3355 getStreamer().emitValueToOffset(Offset, FillExpr, OffsetLoc);
3356 return false;
3357}
3358
3359/// parseDirectiveAlign
3360/// ::= {.align, ...} expression [ , expression [ , expression ]]
3361bool AsmParser::parseDirectiveAlign(bool IsPow2, unsigned ValueSize) {
3362 SMLoc AlignmentLoc = getLexer().getLoc();
3363 int64_t Alignment;
3364 SMLoc MaxBytesLoc;
3365 bool HasFillExpr = false;
3366 int64_t FillExpr = 0;
3367 int64_t MaxBytesToFill = 0;
3368
3369 auto parseAlign = [&]() -> bool {
3370 if (parseAbsoluteExpression(Alignment))
3371 return true;
3372 if (parseOptionalToken(AsmToken::Comma)) {
3373 // The fill expression can be omitted while specifying a maximum number of
3374 // alignment bytes, e.g:
3375 // .align 3,,4
3376 if (getTok().isNot(AsmToken::Comma)) {
3377 HasFillExpr = true;
3378 if (parseAbsoluteExpression(FillExpr))
3379 return true;
3380 }
3381 if (parseOptionalToken(AsmToken::Comma))
3382 if (parseTokenLoc(MaxBytesLoc) ||
3383 parseAbsoluteExpression(MaxBytesToFill))
3384 return true;
3385 }
3386 return parseEOL();
3387 };
3388
3389 if (checkForValidSection())
3390 return true;
3391 // Ignore empty '.p2align' directives for GNU-as compatibility
3392 if (IsPow2 && (ValueSize == 1) && getTok().is(AsmToken::EndOfStatement)) {
3393 Warning(AlignmentLoc, "p2align directive with no operand(s) is ignored");
3394 return parseEOL();
3395 }
3396 if (parseAlign())
3397 return true;
3398
3399 // Always emit an alignment here even if we thrown an error.
3400 bool ReturnVal = false;
3401
3402 // Compute alignment in bytes.
3403 if (IsPow2) {
3404 // FIXME: Diagnose overflow.
3405 if (Alignment >= 32) {
3406 ReturnVal |= Error(AlignmentLoc, "invalid alignment value");
3407 Alignment = 31;
3408 }
3409
3410 Alignment = 1ULL << Alignment;
3411 } else {
3412 // Reject alignments that aren't either a power of two or zero,
3413 // for gas compatibility. Alignment of zero is silently rounded
3414 // up to one.
3415 if (Alignment == 0)
3416 Alignment = 1;
3417 if (!isPowerOf2_64(Alignment))
3418 ReturnVal |= Error(AlignmentLoc, "alignment must be a power of 2");
3419 if (!isUInt<32>(Alignment))
3420 ReturnVal |= Error(AlignmentLoc, "alignment must be smaller than 2**32");
3421 }
3422
3423 // Diagnose non-sensical max bytes to align.
3424 if (MaxBytesLoc.isValid()) {
3425 if (MaxBytesToFill < 1) {
3426 ReturnVal |= Error(MaxBytesLoc,
3427 "alignment directive can never be satisfied in this "
3428 "many bytes, ignoring maximum bytes expression");
3429 MaxBytesToFill = 0;
3430 }
3431
3432 if (MaxBytesToFill >= Alignment) {
3433 Warning(MaxBytesLoc, "maximum bytes expression exceeds alignment and "
3434 "has no effect");
3435 MaxBytesToFill = 0;
3436 }
3437 }
3438
3439 // Check whether we should use optimal code alignment for this .align
3440 // directive.
3441 const MCSection *Section = getStreamer().getCurrentSectionOnly();
3442 assert(Section && "must have section to emit alignment")(static_cast <bool> (Section && "must have section to emit alignment"
) ? void (0) : __assert_fail ("Section && \"must have section to emit alignment\""
, "/build/llvm-toolchain-snapshot-13~++20210613111130+5be314f79ba7/llvm/lib/MC/MCParser/AsmParser.cpp"
, 3442, __extension__ __PRETTY_FUNCTION__))
;
3443 bool UseCodeAlign = Section->UseCodeAlign();
3444 if ((!HasFillExpr || Lexer.getMAI().getTextAlignFillValue() == FillExpr) &&
3445 ValueSize == 1 && UseCodeAlign) {
3446 getStreamer().emitCodeAlignment(Alignment, MaxBytesToFill);
3447 } else {
3448 // FIXME: Target specific behavior about how the "extra" bytes are filled.
3449 getStreamer().emitValueToAlignment(Alignment, FillExpr, ValueSize,
3450 MaxBytesToFill);
3451 }
3452
3453 return ReturnVal;
3454}
3455
3456/// parseDirectiveFile
3457/// ::= .file filename
3458/// ::= .file number [directory] filename [md5 checksum] [source source-text]
3459bool AsmParser::parseDirectiveFile(SMLoc DirectiveLoc) {
3460 // FIXME: I'm not sure what this is.
3461 int64_t FileNumber = -1;
3462 if (getLexer().is(AsmToken::Integer)) {
3463 FileNumber = getTok().getIntVal();
3464 Lex();
3465
3466 if (FileNumber < 0)
3467 return TokError("negative file number");
3468 }
3469
3470 std::string Path;
3471
3472 // Usually the directory and filename together, otherwise just the directory.
3473 // Allow the strings to have escaped octal character sequence.
3474 if (parseEscapedString(Path))
3475 return true;
3476
3477 StringRef Directory;
3478 StringRef Filename;
3479 std::string FilenameData;
3480 if (getLexer().is(AsmToken::String)) {
3481 if (check(FileNumber == -1,
3482 "explicit path specified, but no file number") ||
3483 parseEscapedString(FilenameData))
3484 return true;
3485 Filename = FilenameData;
3486 Directory = Path;
3487 } else {
3488 Filename = Path;
3489 }
3490
3491 uint64_t MD5Hi, MD5Lo;
3492 bool HasMD5 = false;
3493
3494 Optional<StringRef> Source;
3495 bool HasSource = false;
3496 std::string SourceString;
3497
3498 while (!parseOptionalToken(AsmToken::EndOfStatement)) {
3499 StringRef Keyword;
3500 if (check(getTok().isNot(AsmToken::Identifier),
3501 "unexpected token in '.file' directive") ||
3502 parseIdentifier(Keyword))
3503 return true;
3504 if (Keyword == "md5") {
3505 HasMD5 = true;
3506 if (check(FileNumber == -1,
3507 "MD5 checksum specified, but no file number") ||
3508 parseHexOcta(*this, MD5Hi, MD5Lo))
3509 return true;
3510 } else if (Keyword == "source") {
3511 HasSource = true;
3512 if (check(FileNumber == -1,
3513 "source specified, but no file number") ||
3514 check(getTok().isNot(AsmToken::String),
3515 "unexpected token in '.file' directive") ||
3516 parseEscapedString(SourceString))
3517 return true;
3518 } else {
3519 return TokError("unexpected token in '.file' directive");
3520 }
3521 }
3522
3523 if (FileNumber == -1) {
3524 // Ignore the directive if there is no number and the target doesn't support
3525 // numberless .file directives. This allows some portability of assembler
3526 // between different object file formats.
3527 if (getContext().getAsmInfo()->hasSingleParameterDotFile())
3528 getStreamer().emitFileDirective(Filename);
3529 } else {
3530 // In case there is a -g option as well as debug info from directive .file,
3531 // we turn off the -g option, directly use the existing debug info instead.
3532 // Throw away any implicit file table for the assembler source.
3533 if (Ctx.getGenDwarfForAssembly()) {
3534 Ctx.getMCDwarfLineTable(0).resetFileTable();
3535 Ctx.setGenDwarfForAssembly(false);
3536 }
3537
3538 Optional<MD5::MD5Result> CKMem;
3539 if (HasMD5) {
3540 MD5::MD5Result Sum;
3541 for (unsigned i = 0; i != 8; ++i) {
3542 Sum.Bytes[i] = uint8_t(MD5Hi >> ((7 - i) * 8));
3543 Sum.Bytes[i + 8] = uint8_t(MD5Lo >> ((7 - i) * 8));
3544 }
3545 CKMem = Sum;
3546 }
3547 if (HasSource) {
3548 char *SourceBuf = static_cast<char *>(Ctx.allocate(SourceString.size()));
3549 memcpy(SourceBuf, SourceString.data(), SourceString.size());
3550 Source = StringRef(SourceBuf, SourceString.size());
3551 }
3552 if (FileNumber == 0) {
3553 // Upgrade to Version 5 for assembly actions like clang -c a.s.
3554 if (Ctx.getDwarfVersion() < 5)
3555 Ctx.setDwarfVersion(5);
3556 getStreamer().emitDwarfFile0Directive(Directory, Filename, CKMem, Source);
3557 } else {
3558 Expected<unsigned> FileNumOrErr = getStreamer().tryEmitDwarfFileDirective(
3559 FileNumber, Directory, Filename, CKMem, Source);
3560 if (!FileNumOrErr)
3561 return Error(DirectiveLoc, toString(FileNumOrErr.takeError()));
3562 }
3563 // Alert the user if there are some .file directives with MD5 and some not.
3564 // But only do that once.
3565 if (!ReportedInconsistentMD5 && !Ctx.isDwarfMD5UsageConsistent(0)) {
3566 ReportedInconsistentMD5 = true;
3567 return Warning(DirectiveLoc, "inconsistent use of MD5 checksums");
3568 }
3569 }
3570
3571 return false;
3572}
3573
3574/// parseDirectiveLine
3575/// ::= .line [number]
3576bool AsmParser::parseDirectiveLine() {
3577 int64_t LineNumber;
3578 if (getLexer().is(AsmToken::Integer)) {
3579 if (parseIntToken(LineNumber, "unexpected token in '.line' directive"))
3580 return true;
3581 (void)LineNumber;
3582 // FIXME: Do something with the .line.
3583 }
3584 return parseEOL();
3585}
3586
3587/// parseDirectiveLoc
3588/// ::= .loc FileNumber [LineNumber] [ColumnPos] [basic_block] [prologue_end]
3589/// [epilogue_begin] [is_stmt VALUE] [isa VALUE]
3590/// The first number is a file number, must have been previously assigned with
3591/// a .file directive, the second number is the line number and optionally the
3592/// third number is a column position (zero if not specified). The remaining
3593/// optional items are .loc sub-directives.
3594bool AsmParser::parseDirectiveLoc() {
3595 int64_t FileNumber = 0, LineNumber = 0;
3596 SMLoc Loc = getTok().getLoc();
3597 if (parseIntToken(FileNumber, "unexpected token in '.loc' directive") ||
3598 check(FileNumber < 1 && Ctx.getDwarfVersion() < 5, Loc,
3599 "file number less than one in '.loc' directive") ||
3600 check(!getContext().isValidDwarfFileNumber(FileNumber), Loc,
3601 "unassigned file number in '.loc' directive"))
3602 return true;
3603
3604 // optional
3605 if (getLexer().is(AsmToken::Integer)) {
3606 LineNumber = getTok().getIntVal();
3607 if (LineNumber < 0)
3608 return TokError("line number less than zero in '.loc' directive");
3609 Lex();
3610 }
3611
3612 int64_t ColumnPos = 0;
3613 if (getLexer().is(AsmToken::Integer)) {
3614 ColumnPos = getTok().getIntVal();
3615 if (ColumnPos < 0)
3616 return TokError("column position less than zero in '.loc' directive");
3617 Lex();
3618 }
3619
3620 auto PrevFlags = getContext().getCurrentDwarfLoc().getFlags();
3621 unsigned Flags = PrevFlags & DWARF2_FLAG_IS_STMT(1 << 0);
3622 unsigned Isa = 0;
3623 int64_t Discriminator = 0;
3624
3625 auto parseLocOp = [&]() -> bool {
3626 StringRef Name;
3627 SMLoc Loc = getTok().getLoc();
3628 if (parseIdentifier(Name))
3629 return TokError("unexpected token in '.loc' directive");
3630
3631 if (Name == "basic_block")
3632 Flags |= DWARF2_FLAG_BASIC_BLOCK(1 << 1);
3633 else if (Name == "prologue_end")
3634 Flags |= DWARF2_FLAG_PROLOGUE_END(1 << 2);
3635 else if (Name == "epilogue_begin")
3636 Flags |= DWARF2_FLAG_EPILOGUE_BEGIN(1 << 3);
3637 else if (Name == "is_stmt") {
3638 Loc = getTok().getLoc();
3639 const MCExpr *Value;
3640 if (parseExpression(Value))
3641 return true;
3642 // The expression must be the constant 0 or 1.
3643 if (const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Value)) {
3644 int Value = MCE->getValue();
3645 if (Value == 0)
3646 Flags &= ~DWARF2_FLAG_IS_STMT(1 << 0);
3647 else if (Value == 1)
3648 Flags |= DWARF2_FLAG_IS_STMT(1 << 0);
3649 else
3650 return Error(Loc, "is_stmt value not 0 or 1");
3651 } else {
3652 return Error(Loc, "is_stmt value not the constant value of 0 or 1");
3653 }
3654 } else if (Name == "isa") {
3655 Loc = getTok().getLoc();
3656 const MCExpr *Value;
3657 if (parseExpression(Value))
3658 return true;
3659 // The expression must be a constant greater or equal to 0.
3660 if (const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Value)) {
3661 int Value = MCE->getValue();
3662 if (Value < 0)
3663 return Error(Loc, "isa number less than zero");
3664 Isa = Value;
3665 } else {
3666 return Error(Loc, "isa number not a constant value");
3667 }
3668 } else if (Name == "discriminator") {
3669 if (parseAbsoluteExpression(Discriminator))
3670 return true;
3671 } else {
3672 return Error(Loc, "unknown sub-directive in '.loc' directive");
3673 }
3674 return false;
3675 };
3676
3677 if (parseMany(parseLocOp, false /*hasComma*/))
3678 return true;
3679
3680 getStreamer().emitDwarfLocDirective(FileNumber, LineNumber, ColumnPos, Flags,
3681 Isa, Discriminator, StringRef());
3682
3683 return false;
3684}
3685
3686/// parseDirectiveStabs
3687/// ::= .stabs string, number, number, number
3688bool AsmParser::parseDirectiveStabs() {
3689 return TokError("unsupported directive '.stabs'");
3690}
3691
3692/// parseDirectiveCVFile
3693/// ::= .cv_file number filename [checksum] [checksumkind]
3694bool AsmParser::parseDirectiveCVFile() {
3695 SMLoc FileNumberLoc = getTok().getLoc();
3696 int64_t FileNumber;
3697 std::string Filename;
3698 std::string Checksum;
3699 int64_t ChecksumKind = 0;
3700
3701 if (parseIntToken(FileNumber,
3702 "expected file number in '.cv_file' directive") ||
3703 check(FileNumber < 1, FileNumberLoc, "file number less than one") ||
3704 check(getTok().isNot(AsmToken::String),
3705 "unexpected token in '.cv_file' directive") ||
3706 parseEscapedString(Filename))
3707 return true;
3708 if (!parseOptionalToken(AsmToken::EndOfStatement)) {
3709 if (check(getTok().isNot(AsmToken::String),
3710 "unexpected token in '.cv_file' directive") ||
3711 parseEscapedString(Checksum) ||
3712 parseIntToken(ChecksumKind,
3713 "expected checksum kind in '.cv_file' directive") ||
3714 parseToken(AsmToken::EndOfStatement,
3715 "unexpected token in '.cv_file' directive"))
3716 return true;
3717 }
3718
3719 Checksum = fromHex(Checksum);
3720 void *CKMem = Ctx.allocate(Checksum.size(), 1);
3721 memcpy(CKMem, Checksum.data(), Checksum.size());
3722 ArrayRef<uint8_t> ChecksumAsBytes(reinterpret_cast<const uint8_t *>(CKMem),
3723 Checksum.size());
3724
3725 if (!getStreamer().EmitCVFileDirective(FileNumber, Filename, ChecksumAsBytes,
3726 static_cast<uint8_t>(ChecksumKind)))
3727 return Error(FileNumberLoc, "file number already allocated");
3728
3729 return false;
3730}
3731
3732bool AsmParser::parseCVFunctionId(int64_t &FunctionId,
3733 StringRef DirectiveName) {
3734 SMLoc Loc;
3735 return parseTokenLoc(Loc) ||
3736 parseIntToken(FunctionId, "expected function id in '" + DirectiveName +
3737 "' directive") ||
3738 check(FunctionId < 0 || FunctionId >= UINT_MAX(2147483647 *2U +1U), Loc,
3739 "expected function id within range [0, UINT_MAX)");
3740}
3741
3742bool AsmParser::parseCVFileId(int64_t &FileNumber, StringRef DirectiveName) {
3743 SMLoc Loc;
3744 return parseTokenLoc(Loc) ||
3745 parseIntToken(FileNumber, "expected integer in '" + DirectiveName +
3746 "' directive") ||
3747 check(FileNumber < 1, Loc, "file number less than one in '" +
3748 DirectiveName + "' directive") ||
3749 check(!getCVContext().isValidFileNumber(FileNumber), Loc,
3750 "unassigned file number in '" + DirectiveName + "' directive");
3751}
3752
3753/// parseDirectiveCVFuncId
3754/// ::= .cv_func_id FunctionId
3755///
3756/// Introduces a function ID that can be used with .cv_loc.
3757bool AsmParser::parseDirectiveCVFuncId() {
3758 SMLoc FunctionIdLoc = getTok().getLoc();
3759 int64_t FunctionId;
3760
3761 if (parseCVFunctionId(FunctionId, ".cv_func_id") ||
3762 parseToken(AsmToken::EndOfStatement,
3763 "unexpected token in '.cv_func_id' directive"))
3764 return true;
3765
3766 if (!getStreamer().EmitCVFuncIdDirective(FunctionId))
3767 return Error(FunctionIdLoc, "function id already allocated");
3768
3769 return false;
3770}
3771
3772/// parseDirectiveCVInlineSiteId
3773/// ::= .cv_inline_site_id FunctionId
3774/// "within" IAFunc
3775/// "inlined_at" IAFile IALine [IACol]
3776///
3777/// Introduces a function ID that can be used with .cv_loc. Includes "inlined
3778/// at" source location information for use in the line table of the caller,
3779/// whether the caller is a real function or another inlined call site.
3780bool AsmParser::parseDirectiveCVInlineSiteId() {
3781 SMLoc FunctionIdLoc = getTok().getLoc();
3782 int64_t FunctionId;
3783 int64_t IAFunc;
3784 int64_t IAFile;
3785 int64_t IALine;
3786 int64_t IACol = 0;
3787
3788 // FunctionId
3789 if (parseCVFunctionId(FunctionId, ".cv_inline_site_id"))
3790 return true;
3791
3792 // "within"
3793 if (check((getLexer().isNot(AsmToken::Identifier) ||
3794 getTok().getIdentifier() != "within"),
3795 "expected 'within' identifier in '.cv_inline_site_id' directive"))
3796 return true;
3797 Lex();
3798
3799 // IAFunc
3800 if (parseCVFunctionId(IAFunc, ".cv_inline_site_id"))
3801 return true;
3802
3803 // "inlined_at"
3804 if (check((getLexer().isNot(AsmToken::Identifier) ||
3805 getTok().getIdentifier() != "inlined_at"),
3806 "expected 'inlined_at' identifier in '.cv_inline_site_id' "
3807 "directive") )
3808 return true;
3809 Lex();
3810
3811 // IAFile IALine
3812 if (parseCVFileId(IAFile, ".cv_inline_site_id") ||
3813 parseIntToken(IALine, "expected line number after 'inlined_at'"))
3814 return true;
3815
3816 // [IACol]
3817 if (getLexer().is(AsmToken::Integer)) {
3818 IACol = getTok().getIntVal();
3819 Lex();
3820 }
3821
3822 if (parseToken(AsmToken::EndOfStatement,
3823 "unexpected token in '.cv_inline_site_id' directive"))
3824 return true;
3825
3826 if (!getStreamer().EmitCVInlineSiteIdDirective(FunctionId, IAFunc, IAFile,
3827 IALine, IACol, FunctionIdLoc))
3828 return Error(FunctionIdLoc, "function id already allocated");
3829
3830 return false;
3831}
3832
3833/// parseDirectiveCVLoc
3834/// ::= .cv_loc FunctionId FileNumber [LineNumber] [ColumnPos] [prologue_end]
3835/// [is_stmt VALUE]
3836/// The first number is a file number, must have been previously assigned with
3837/// a .file directive, the second number is the line number and optionally the
3838/// third number is a column position (zero if not specified). The remaining
3839/// optional items are .loc sub-directives.
3840bool AsmParser::parseDirectiveCVLoc() {
3841 SMLoc DirectiveLoc = getTok().getLoc();
3842 int64_t FunctionId, FileNumber;
3843 if (parseCVFunctionId(FunctionId, ".cv_loc") ||
3844 parseCVFileId(FileNumber, ".cv_loc"))
3845 return true;
3846
3847 int64_t LineNumber = 0;
3848 if (getLexer().is(AsmToken::Integer)) {
3849 LineNumber = getTok().getIntVal();
3850 if (LineNumber < 0)
3851 return TokError("line number less than zero in '.cv_loc' directive");
3852 Lex();
3853 }
3854
3855 int64_t ColumnPos = 0;
3856 if (getLexer().is(AsmToken::Integer)) {
3857 ColumnPos = getTok().getIntVal();
3858 if (ColumnPos < 0)
3859 return TokError("column position less than zero in '.cv_loc' directive");
3860 Lex();
3861 }
3862
3863 bool PrologueEnd = false;
3864 uint64_t IsStmt = 0;
3865
3866 auto parseOp = [&]() -> bool {
3867 StringRef Name;
3868 SMLoc Loc = getTok().getLoc();
3869 if (parseIdentifier(Name))
3870 return TokError("unexpected token in '.cv_loc' directive");
3871 if (Name == "prologue_end")
3872 PrologueEnd = true;
3873 else if (Name == "is_stmt") {
3874 Loc = getTok().getLoc();
3875 const MCExpr *Value;
3876 if (parseExpression(Value))
3877 return true;
3878 // The expression must be the constant 0 or 1.
3879 IsStmt = ~0ULL;
3880 if (const auto *MCE = dyn_cast<MCConstantExpr>(Value))
3881 IsStmt = MCE->getValue();
3882
3883 if (IsStmt > 1)
3884 return Error(Loc, "is_stmt value not 0 or 1");
3885 } else {
3886 return Error(Loc, "unknown sub-directive in '.cv_loc' directive");
3887 }
3888 return false;
3889 };
3890
3891 if (parseMany(parseOp, false /*hasComma*/))
3892 return true;
3893
3894 getStreamer().emitCVLocDirective(FunctionId, FileNumber, LineNumber,
3895 ColumnPos, PrologueEnd, IsStmt, StringRef(),
3896 DirectiveLoc);
3897 return false;
3898}
3899
3900/// parseDirectiveCVLinetable
3901/// ::= .cv_linetable FunctionId, FnStart, FnEnd
3902bool AsmParser::parseDirectiveCVLinetable() {
3903 int64_t FunctionId;
3904 StringRef FnStartName, FnEndName;
3905 SMLoc Loc = getTok().getLoc();
3906 if (parseCVFunctionId(FunctionId, ".cv_linetable") || parseComma() ||
3907 parseTokenLoc(Loc) ||
3908 check(parseIdentifier(FnStartName), Loc,
3909 "expected identifier in directive") ||
3910 parseComma() || parseTokenLoc(Loc) ||
3911 check(parseIdentifier(FnEndName), Loc,
3912 "expected identifier in directive"))
3913 return true;
3914
3915 MCSymbol *FnStartSym = getContext().getOrCreateSymbol(FnStartName);
3916 MCSymbol *FnEndSym = getContext().getOrCreateSymbol(FnEndName);
3917
3918 getStreamer().emitCVLinetableDirective(FunctionId, FnStartSym, FnEndSym);
3919 return false;
3920}
3921
3922/// parseDirectiveCVInlineLinetable
3923/// ::= .cv_inline_linetable PrimaryFunctionId FileId LineNum FnStart FnEnd
3924bool AsmParser::parseDirectiveCVInlineLinetable() {
3925 int64_t PrimaryFunctionId, SourceFileId, SourceLineNum;
3926 StringRef FnStartName, FnEndName;
3927 SMLoc Loc = getTok().getLoc();
3928 if (parseCVFunctionId(PrimaryFunctionId, ".cv_inline_linetable") ||
3929 parseTokenLoc(Loc) ||
3930 parseIntToken(
3931 SourceFileId,
3932 "expected SourceField in '.cv_inline_linetable' directive") ||
3933 check(SourceFileId <= 0, Loc,
3934 "File id less than zero in '.cv_inline_linetable' directive") ||
3935 parseTokenLoc(Loc) ||
3936 parseIntToken(
3937 SourceLineNum,
3938 "expected SourceLineNum in '.cv_inline_linetable' directive") ||
3939 check(SourceLineNum < 0, Loc,
3940 "Line number less than zero in '.cv_inline_linetable' directive") ||
3941 parseTokenLoc(Loc) || check(parseIdentifier(FnStartName), Loc,
3942 "expected identifier in directive") ||
3943 parseTokenLoc(Loc) || check(parseIdentifier(FnEndName), Loc,
3944 "expected identifier in directive"))
3945 return true;
3946
3947 if (parseToken(AsmToken::EndOfStatement, "Expected End of Statement"))
3948 return true;
3949
3950 MCSymbol *FnStartSym = getContext().getOrCreateSymbol(FnStartName);
3951 MCSymbol *FnEndSym = getContext().getOrCreateSymbol(FnEndName);
3952 getStreamer().emitCVInlineLinetableDirective(PrimaryFunctionId, SourceFileId,
3953 SourceLineNum, FnStartSym,
3954 FnEndSym);
3955 return false;
3956}
3957
3958void AsmParser::initializeCVDefRangeTypeMap() {
3959 CVDefRangeTypeMap["reg"] = CVDR_DEFRANGE_REGISTER;
3960 CVDefRangeTypeMap["frame_ptr_rel"] = CVDR_DEFRANGE_FRAMEPOINTER_REL;
3961 CVDefRangeTypeMap["subfield_reg"] = CVDR_DEFRANGE_SUBFIELD_REGISTER;
3962 CVDefRangeTypeMap["reg_rel"] = CVDR_DEFRANGE_REGISTER_REL;
3963}
3964
3965/// parseDirectiveCVDefRange
3966/// ::= .cv_def_range RangeStart RangeEnd (GapStart GapEnd)*, bytes*
3967bool AsmParser::parseDirectiveCVDefRange() {
3968 SMLoc Loc;
3969 std::vector<std::pair<const MCSymbol *, const MCSymbol *>> Ranges;
3970 while (getLexer().is(AsmToken::Identifier)) {
3971 Loc = getLexer().getLoc();
3972 StringRef GapStartName;
3973 if (parseIdentifier(GapStartName))
3974 return Error(Loc, "expected identifier in directive");
3975 MCSymbol *GapStartSym = getContext().getOrCreateSymbol(GapStartName);
3976
3977 Loc = getLexer().getLoc();
3978 StringRef GapEndName;
3979 if (parseIdentifier(GapEndName))
3980 return Error(Loc, "expected identifier in directive");
3981 MCSymbol *GapEndSym = getContext().getOrCreateSymbol(GapEndName);
3982
3983 Ranges.push_back({GapStartSym, GapEndSym});
3984 }
3985
3986 StringRef CVDefRangeTypeStr;
3987 if (parseToken(
3988 AsmToken::Comma,
3989 "expected comma before def_range type in .cv_def_range directive") ||
3990 parseIdentifier(CVDefRangeTypeStr))
3991 return Error(Loc, "expected def_range type in directive");
3992
3993 StringMap<CVDefRangeType>::const_iterator CVTypeIt =
3994 CVDefRangeTypeMap.find(CVDefRangeTypeStr);
3995 CVDefRangeType CVDRType = (CVTypeIt == CVDefRangeTypeMap.end())
3996 ? CVDR_DEFRANGE
3997 : CVTypeIt->getValue();
3998 switch (CVDRType) {
3999 case CVDR_DEFRANGE_REGISTER: {
4000 int64_t DRRegister;
4001 if (parseToken(AsmToken::Comma, "expected comma before register number in "
4002 ".cv_def_range directive") ||
4003 parseAbsoluteExpression(DRRegister))
4004 return Error(Loc, "expected register number");
4005
4006 codeview::DefRangeRegisterHeader DRHdr;
4007 DRHdr.Register = DRRegister;
4008 DRHdr.MayHaveNoName = 0;
4009 getStreamer().emitCVDefRangeDirective(Ranges, DRHdr);
4010 break;
4011 }
4012 case CVDR_DEFRANGE_FRAMEPOINTER_REL: {
4013 int64_t DROffset;
4014 if (parseToken(AsmToken::Comma,
4015 "expected comma before offset in .cv_def_range directive") ||
4016 parseAbsoluteExpression(DROffset))
4017 return Error(Loc, "expected offset value");
4018
4019 codeview::DefRangeFramePointerRelHeader DRHdr;
4020 DRHdr.Offset = DROffset;
4021 getStreamer().emitCVDefRangeDirective(Ranges, DRHdr);
4022 break;
4023 }
4024 case CVDR_DEFRANGE_SUBFIELD_REGISTER: {
4025 int64_t DRRegister;
4026 int64_t DROffsetInParent;
4027 if (parseToken(AsmToken::Comma, "expected comma before register number in "
4028 ".cv_def_range directive") ||
4029 parseAbsoluteExpression(DRRegister))
4030 return Error(Loc, "expected register number");
4031 if (parseToken(AsmToken::Comma,
4032 "expected comma before offset in .cv_def_range directive") ||
4033 parseAbsoluteExpression(DROffsetInParent))
4034 return Error(Loc, "expected offset value");
4035
4036 codeview::DefRangeSubfieldRegisterHeader DRHdr;
4037 DRHdr.Register = DRRegister;
4038 DRHdr.MayHaveNoName = 0;
4039 DRHdr.OffsetInParent = DROffsetInParent;
4040 getStreamer().emitCVDefRangeDirective(Ranges, DRHdr);
4041 break;
4042 }
4043 case CVDR_DEFRANGE_REGISTER_REL: {
4044 int64_t DRRegister;
4045 int64_t DRFlags;
4046 int64_t DRBasePointerOffset;
4047 if (parseToken(AsmToken::Comma, "expected comma before register number in "
4048 ".cv_def_range directive") ||
4049 parseAbsoluteExpression(DRRegister))
4050 return Error(Loc, "expected register value");
4051 if (parseToken(
4052 AsmToken::Comma,
4053 "expected comma before flag value in .cv_def_range directive") ||
4054 parseAbsoluteExpression(DRFlags))
4055 return Error(Loc, "expected flag value");
4056 if (parseToken(AsmToken::Comma, "expected comma before base pointer offset "
4057 "in .cv_def_range directive") ||
4058 parseAbsoluteExpression(DRBasePointerOffset))
4059 return Error(Loc, "expected base pointer offset value");
4060
4061 codeview::DefRangeRegisterRelHeader DRHdr;
4062 DRHdr.Register = DRRegister;
4063 DRHdr.Flags = DRFlags;
4064 DRHdr.BasePointerOffset = DRBasePointerOffset;
4065 getStreamer().emitCVDefRangeDirective(Ranges, DRHdr);
4066 break;
4067 }
4068 default:
4069 return Error(Loc, "unexpected def_range type in .cv_def_range directive");
4070 }
4071 return true;
4072}
4073
4074/// parseDirectiveCVString
4075/// ::= .cv_stringtable "string"
4076bool AsmParser::parseDirectiveCVString() {
4077 std::string Data;
4078 if (checkForValidSection() || parseEscapedString(Data))
4079 return true;
4080
4081 // Put the string in the table and emit the offset.
4082 std::pair<StringRef, unsigned> Insertion =
4083 getCVContext().addToStringTable(Data);
4084 getStreamer().emitInt32(Insertion.second);
4085 return false;
4086}
4087
4088/// parseDirectiveCVStringTable
4089/// ::= .cv_stringtable
4090bool AsmParser::parseDirectiveCVStringTable() {
4091 getStreamer().emitCVStringTableDirective();
4092 return false;
4093}
4094
4095/// parseDirectiveCVFileChecksums
4096/// ::= .cv_filechecksums
4097bool AsmParser::parseDirectiveCVFileChecksums() {
4098 getStreamer().emitCVFileChecksumsDirective();
4099 return false;
4100}
4101
4102/// parseDirectiveCVFileChecksumOffset
4103/// ::= .cv_filechecksumoffset fileno
4104bool AsmParser::parseDirectiveCVFileChecksumOffset() {
4105 int64_t FileNo;
4106 if (parseIntToken(FileNo, "expected identifier in directive"))
4107 return true;
4108 if (parseToken(AsmToken::EndOfStatement, "Expected End of Statement"))
4109 return true;
4110 getStreamer().emitCVFileChecksumOffsetDirective(FileNo);
4111 return false;
4112}
4113
4114/// parseDirectiveCVFPOData
4115/// ::= .cv_fpo_data procsym
4116bool AsmParser::parseDirectiveCVFPOData() {
4117 SMLoc DirLoc = getLexer().getLoc();
4118 StringRef ProcName;
4119 if (parseIdentifier(ProcName))
4120 return TokError("expected symbol name");
4121 if (parseEOL())
4122 return true;
4123 MCSymbol *ProcSym = getContext().getOrCreateSymbol(ProcName);
4124 getStreamer().EmitCVFPOData(ProcSym, DirLoc);
4125 return false;
4126}
4127
4128/// parseDirectiveCFISections
4129/// ::= .cfi_sections section [, section]
4130bool AsmParser::parseDirectiveCFISections() {
4131 StringRef Name;
4132 bool EH = false;
4133 bool Debug = false;
4134
4135 if (!parseOptionalToken(AsmToken::EndOfStatement)) {
4136 for (;;) {
4137 if (parseIdentifier(Name))
4138 return TokError("expected .eh_frame or .debug_frame");
4139 if (Name == ".eh_frame")
4140 EH = true;
4141 else if (Name == ".debug_frame")
4142 Debug = true;
4143 if (parseOptionalToken(AsmToken::EndOfStatement))
4144 break;
4145 if (parseComma())
4146 return true;
4147 }
4148 }
4149 getStreamer().emitCFISections(EH, Debug);
4150 return false;
4151}
4152
4153/// parseDirectiveCFIStartProc
4154/// ::= .cfi_startproc [simple]
4155bool AsmParser::parseDirectiveCFIStartProc() {
4156 StringRef Simple;
4157 if (!parseOptionalToken(AsmToken::EndOfStatement)) {
4158 if (check(parseIdentifier(Simple) || Simple != "simple",
4159 "unexpected token") ||
4160 parseEOL())
4161 return true;
4162 }
4163
4164 // TODO(kristina): Deal with a corner case of incorrect diagnostic context
4165 // being produced if this directive is emitted as part of preprocessor macro
4166 // expansion which can *ONLY* happen if Clang's cc1as is the API consumer.
4167 // Tools like llvm-mc on the other hand are not affected by it, and report
4168 // correct context information.
4169 getStreamer().emitCFIStartProc(!Simple.empty(), Lexer.getLoc());
4170 return false;
4171}
4172
4173/// parseDirectiveCFIEndProc
4174/// ::= .cfi_endproc
4175bool AsmParser::parseDirectiveCFIEndProc() {
4176 if (parseEOL())
4177 return true;
4178 getStreamer().emitCFIEndProc();
4179 return false;
4180}
4181
4182/// parse register name or number.
4183bool AsmParser::parseRegisterOrRegisterNumber(int64_t &Register,
4184 SMLoc DirectiveLoc) {
4185 unsigned RegNo;
4186
4187 if (getLexer().isNot(AsmToken::Integer)) {
4188 if (getTargetParser().ParseRegister(RegNo, DirectiveLoc, DirectiveLoc))
4189 return true;
4190 Register = getContext().getRegisterInfo()->getDwarfRegNum(RegNo, true);
4191 } else
4192 return parseAbsoluteExpression(Register);
4193
4194 return false;
4195}
4196
4197/// parseDirectiveCFIDefCfa
4198/// ::= .cfi_def_cfa register, offset
4199bool AsmParser::parseDirectiveCFIDefCfa(SMLoc DirectiveLoc) {
4200 int64_t Register = 0, Offset = 0;
4201 if (parseRegisterOrRegisterNumber(Register, DirectiveLoc) || parseComma() ||
4202 parseAbsoluteExpression(Offset) || parseEOL())
4203 return true;
4204
4205 getStreamer().emitCFIDefCfa(Register, Offset);
4206 return false;
4207}
4208
4209/// parseDirectiveCFIDefCfaOffset
4210/// ::= .cfi_def_cfa_offset offset
4211bool AsmParser::parseDirectiveCFIDefCfaOffset() {
4212 int64_t Offset = 0;
4213 if (parseAbsoluteExpression(Offset) || parseEOL())
4214 return true;
4215
4216 getStreamer().emitCFIDefCfaOffset(Offset);
4217 return false;
4218}
4219
4220/// parseDirectiveCFIRegister
4221/// ::= .cfi_register register, register
4222bool AsmParser::parseDirectiveCFIRegister(SMLoc DirectiveLoc) {
4223 int64_t Register1 = 0, Register2 = 0;
4224 if (parseRegisterOrRegisterNumber(Register1, DirectiveLoc) || parseComma() ||
4225 parseRegisterOrRegisterNumber(Register2, DirectiveLoc) || parseEOL())
4226 return true;
4227
4228 getStreamer().emitCFIRegister(Register1, Register2);
4229 return false;
4230}
4231
4232/// parseDirectiveCFIWindowSave
4233/// ::= .cfi_window_save
4234bool AsmParser::parseDirectiveCFIWindowSave() {
4235 if (parseEOL())
4236 return true;
4237 getStreamer().emitCFIWindowSave();
4238 return false;
4239}
4240
4241/// parseDirectiveCFIAdjustCfaOffset
4242/// ::= .cfi_adjust_cfa_offset adjustment
4243bool AsmParser::parseDirectiveCFIAdjustCfaOffset() {
4244 int64_t Adjustment = 0;
4245 if (parseAbsoluteExpression(Adjustment) || parseEOL())
4246 return true;
4247
4248 getStreamer().emitCFIAdjustCfaOffset(Adjustment);
4249 return false;
4250}
4251
4252/// parseDirectiveCFIDefCfaRegister
4253/// ::= .cfi_def_cfa_register register
4254bool AsmParser::parseDirectiveCFIDefCfaRegister(SMLoc DirectiveLoc) {
4255 int64_t Register = 0;
4256 if (parseRegisterOrRegisterNumber(Register, DirectiveLoc) || parseEOL())
4257 return true;
4258
4259 getStreamer().emitCFIDefCfaRegister(Register);
4260 return false;
4261}
4262
4263/// parseDirectiveCFIOffset
4264/// ::= .cfi_offset register, offset
4265bool AsmParser::parseDirectiveCFIOffset(SMLoc DirectiveLoc) {
4266 int64_t Register = 0;
4267 int64_t Offset = 0;
4268
4269 if (parseRegisterOrRegisterNumber(Register, DirectiveLoc) || parseComma() ||
4270 parseAbsoluteExpression(Offset) || parseEOL())
4271 return true;
4272
4273 getStreamer().emitCFIOffset(Register, Offset);
4274 return false;
4275}
4276
4277/// parseDirectiveCFIRelOffset
4278/// ::= .cfi_rel_offset register, offset
4279bool AsmParser::parseDirectiveCFIRelOffset(SMLoc DirectiveLoc) {
4280 int64_t Register = 0, Offset = 0;
4281
4282 if (parseRegisterOrRegisterNumber(Register, DirectiveLoc) || parseComma() ||
4283 parseAbsoluteExpression(Offset) || parseEOL())
4284 return true;
4285
4286 getStreamer().emitCFIRelOffset(Register, Offset);
4287 return false;
4288}
4289
4290static bool isValidEncoding(int64_t Encoding) {
4291 if (Encoding & ~0xff)
4292 return false;
4293
4294 if (Encoding == dwarf::DW_EH_PE_omit)
4295 return true;
4296
4297 const unsigned Format = Encoding & 0xf;
4298 if (Format != dwarf::DW_EH_PE_absptr && Format != dwarf::DW_EH_PE_udata2 &&
4299 Format != dwarf::DW_EH_PE_udata4 && Format != dwarf::DW_EH_PE_udata8 &&
4300 Format != dwarf::DW_EH_PE_sdata2 && Format != dwarf::DW_EH_PE_sdata4 &&
4301 Format != dwarf::DW_EH_PE_sdata8 && Format != dwarf::DW_EH_PE_signed)
4302 return false;
4303
4304 const unsigned Application = Encoding & 0x70;
4305 if (Application != dwarf::DW_EH_PE_absptr &&
4306 Application != dwarf::DW_EH_PE_pcrel)
4307 return false;
4308
4309 return true;
4310}
4311
4312/// parseDirectiveCFIPersonalityOrLsda
4313/// IsPersonality true for cfi_personality, false for cfi_lsda
4314/// ::= .cfi_personality encoding, [symbol_name]
4315/// ::= .cfi_lsda encoding, [symbol_name]
4316bool AsmParser::parseDirectiveCFIPersonalityOrLsda(bool IsPersonality) {
4317 int64_t Encoding = 0;
4318 if (parseAbsoluteExpression(Encoding))
4319 return true;
4320 if (Encoding == dwarf::DW_EH_PE_omit)
4321 return false;
4322
4323 StringRef Name;
4324 if (check(!isValidEncoding(Encoding), "unsupported encoding.") ||
4325 parseComma() ||
4326 check(parseIdentifier(Name), "expected identifier in directive") ||
4327 parseEOL())
4328 return true;
4329
4330 MCSymbol *Sym = getContext().getOrCreateSymbol(Name);
4331
4332 if (IsPersonality)
4333 getStreamer().emitCFIPersonality(Sym, Encoding);
4334 else
4335 getStreamer().emitCFILsda(Sym, Encoding);
4336 return false;
4337}
4338
4339/// parseDirectiveCFIRememberState
4340/// ::= .cfi_remember_state
4341bool AsmParser::parseDirectiveCFIRememberState() {
4342 if (parseEOL())
4343 return true;
4344 getStreamer().emitCFIRememberState();
4345 return false;
4346}
4347
4348/// parseDirectiveCFIRestoreState
4349/// ::= .cfi_remember_state
4350bool AsmParser::parseDirectiveCFIRestoreState() {
4351 if (parseEOL())
4352 return true;
4353 getStreamer().emitCFIRestoreState();
4354 return false;
4355}
4356
4357/// parseDirectiveCFISameValue
4358/// ::= .cfi_same_value register
4359bool AsmParser::parseDirectiveCFISameValue(SMLoc DirectiveLoc) {
4360 int64_t Register = 0;
4361
4362 if (parseRegisterOrRegisterNumber(Register, DirectiveLoc) || parseEOL())
4363 return true;
4364
4365 getStreamer().emitCFISameValue(Register);
4366 return false;
4367}
4368
4369/// parseDirectiveCFIRestore
4370/// ::= .cfi_restore register
4371bool AsmParser::parseDirectiveCFIRestore(SMLoc DirectiveLoc) {
4372 int64_t Register = 0;
4373 if (parseRegisterOrRegisterNumber(Register, DirectiveLoc) || parseEOL())
4374 return true;
4375
4376 getStreamer().emitCFIRestore(Register);
4377 return false;
4378}
4379
4380/// parseDirectiveCFIEscape
4381/// ::= .cfi_escape expression[,...]
4382bool AsmParser::parseDirectiveCFIEscape() {
4383 std::string Values;
4384 int64_t CurrValue;
4385 if (parseAbsoluteExpression(CurrValue))
4386 return true;
4387
4388 Values.push_back((uint8_t)CurrValue);
4389
4390 while (getLexer().is(AsmToken::Comma)) {
4391 Lex();
4392
4393 if (parseAbsoluteExpression(CurrValue))
4394 return true;
4395
4396 Values.push_back((uint8_t)CurrValue);
4397 }
4398
4399 getStreamer().emitCFIEscape(Values);
4400 return false;
4401}
4402
4403/// parseDirectiveCFIReturnColumn
4404/// ::= .cfi_return_column register
4405bool AsmParser::parseDirectiveCFIReturnColumn(SMLoc DirectiveLoc) {
4406 int64_t Register = 0;
4407 if (parseRegisterOrRegisterNumber(Register, DirectiveLoc) || parseEOL())
4408 return true;
4409 getStreamer().emitCFIReturnColumn(Register);
4410 return false;
4411}
4412
4413/// parseDirectiveCFISignalFrame
4414/// ::= .cfi_signal_frame
4415bool AsmParser::parseDirectiveCFISignalFrame() {
4416 if (parseEOL())
4417 return true;
4418
4419 getStreamer().emitCFISignalFrame();
4420 return false;
4421}
4422
4423/// parseDirectiveCFIUndefined
4424/// ::= .cfi_undefined register
4425bool AsmParser::parseDirectiveCFIUndefined(SMLoc DirectiveLoc) {
4426 int64_t Register = 0;
4427
4428 if (parseRegisterOrRegisterNumber(Register, DirectiveLoc) || parseEOL())
4429 return true;
4430
4431 getStreamer().emitCFIUndefined(Register);
4432 return false;
4433}
4434
4435/// parseDirectiveAltmacro
4436/// ::= .altmacro
4437/// ::= .noaltmacro
4438bool AsmParser::parseDirectiveAltmacro(StringRef Directive) {
4439 if (parseEOL())
4440 return true;
4441 AltMacroMode = (Directive == ".altmacro");
4442 return false;
4443}
4444
4445/// parseDirectiveMacrosOnOff
4446/// ::= .macros_on
4447/// ::= .macros_off
4448bool AsmParser::parseDirectiveMacrosOnOff(StringRef Directive) {
4449 if (parseEOL())
4450 return true;
4451 setMacrosEnabled(Directive == ".macros_on");
4452 return false;
4453}
4454
4455/// parseDirectiveMacro
4456/// ::= .macro name[,] [parameters]
4457bool AsmParser::parseDirectiveMacro(SMLoc DirectiveLoc) {
4458 StringRef Name;
4459 if (parseIdentifier(Name))
4460 return TokError("expected identifier in '.macro' directive");
4461
4462 if (getLexer().is(AsmToken::Comma))
4463 Lex();
4464
4465 MCAsmMacroParameters Parameters;
4466 while (getLexer().isNot(AsmToken::EndOfStatement)) {
4467
4468 if (!Parameters.empty() && Parameters.back().Vararg)
4469 return Error(Lexer.getLoc(), "vararg parameter '" +
4470 Parameters.back().Name +
4471 "' should be the last parameter");
4472
4473 MCAsmMacroParameter Parameter;
4474 if (parseIdentifier(Parameter.Name))
4475 return TokError("expected identifier in '.macro' directive");
4476
4477 // Emit an error if two (or more) named parameters share the same name
4478 for (const MCAsmMacroParameter& CurrParam : Parameters)
4479 if (CurrParam.Name.equals(Parameter.Name))
4480 return TokError("macro '" + Name + "' has multiple parameters"
4481 " named '" + Parameter.Name + "'");
4482
4483 if (Lexer.is(AsmToken::Colon)) {
4484 Lex(); // consume ':'
4485
4486 SMLoc QualLoc;
4487 StringRef Qualifier;
4488
4489 QualLoc = Lexer.getLoc();
4490 if (parseIdentifier(Qualifier))
4491 return Error(QualLoc, "missing parameter qualifier for "
4492 "'" + Parameter.Name + "' in macro '" + Name + "'");
4493
4494 if (Qualifier == "req")
4495 Parameter.Required = true;
4496 else if (Qualifier == "vararg")
4497 Parameter.Vararg = true;
4498 else
4499 return Error(QualLoc, Qualifier + " is not a valid parameter qualifier "
4500 "for '" + Parameter.Name + "' in macro '" + Name + "'");
4501 }
4502
4503 if (getLexer().is(AsmToken::Equal)) {
4504 Lex();
4505
4506 SMLoc ParamLoc;
4507
4508 ParamLoc = Lexer.getLoc();
4509 if (parseMacroArgument(Parameter.Value, /*Vararg=*/false ))
4510 return true;
4511
4512 if (Parameter.Required)
4513 Warning(ParamLoc, "pointless default value for required parameter "
4514 "'" + Parameter.Name + "' in macro '" + Name + "'");
4515 }
4516
4517 Parameters.push_back(std::move(Parameter));
4518
4519 if (getLexer().is(AsmToken::Comma))
4520 Lex();
4521 }
4522
4523 // Eat just the end of statement.
4524 Lexer.Lex();
4525
4526 // Consuming deferred text, so use Lexer.Lex to ignore Lexing Errors
4527 AsmToken EndToken, StartToken = getTok();
4528 unsigned MacroDepth = 0;
4529 // Lex the macro definition.
4530 while (true) {
4531 // Ignore Lexing errors in macros.
4532 while (Lexer.is(AsmToken::Error)) {
4533 Lexer.Lex();
4534 }
4535
4536 // Check whether we have reached the end of the file.
4537 if (getLexer().is(AsmToken::Eof))
4538 return Error(DirectiveLoc, "no matching '.endmacro' in definition");
4539
4540 // Otherwise, check whether we have reach the .endmacro or the start of a
4541 // preprocessor line marker.
4542 if (getLexer().is(AsmToken::Identifier)) {
4543 if (getTok().getIdentifier() == ".endm" ||
4544 getTok().getIdentifier() == ".endmacro") {
4545 if (MacroDepth == 0) { // Outermost macro.
4546 EndToken = getTok();
4547 Lexer.Lex();
4548 if (getLexer().isNot(AsmToken::EndOfStatement))
4549 return TokError("unexpected token in '" + EndToken.getIdentifier() +
4550 "' directive");
4551 break;
4552 } else {
4553 // Otherwise we just found the end of an inner macro.
4554 --MacroDepth;
4555 }
4556 } else if (getTok().getIdentifier() == ".macro") {
4557 // We allow nested macros. Those aren't instantiated until the outermost
4558 // macro is expanded so just ignore them for now.
4559 ++MacroDepth;
4560 }
4561 } else if (Lexer.is(AsmToken::HashDirective)) {
4562 (void)parseCppHashLineFilenameComment(getLexer().getLoc());
4563 }
4564
4565 // Otherwise, scan til the end of the statement.
4566 eatToEndOfStatement();
4567 }
4568
4569 if (getContext().lookupMacro(Name)) {
4570 return Error(DirectiveLoc, "macro '" + Name + "' is already defined");
4571 }
4572
4573 const char *BodyStart = StartToken.getLoc().getPointer();
4574 const char *BodyEnd = EndToken.getLoc().getPointer();
4575 StringRef Body = StringRef(BodyStart, BodyEnd - BodyStart);
4576 checkForBadMacro(DirectiveLoc, Name, Body, Parameters);
4577 MCAsmMacro Macro(Name, Body, std::move(Parameters));
4578 DEBUG_WITH_TYPE("asm-macros", dbgs() << "Defining new macro:\n";do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("asm-macros")) { dbgs() << "Defining new macro:\n"; Macro
.dump(); } } while (false)
4579 Macro.dump())do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("asm-macros")) { dbgs() << "Defining new macro:\n"; Macro
.dump(); } } while (false)
;
4580 getContext().defineMacro(Name, std::move(Macro));
4581 return false;
4582}
4583
4584/// checkForBadMacro
4585///
4586/// With the support added for named parameters there may be code out there that
4587/// is transitioning from positional parameters. In versions of gas that did
4588/// not support named parameters they would be ignored on the macro definition.
4589/// But to support both styles of parameters this is not possible so if a macro
4590/// definition has named parameters but does not use them and has what appears
4591/// to be positional parameters, strings like $1, $2, ... and $n, then issue a
4592/// warning that the positional parameter found in body which have no effect.
4593/// Hoping the developer will either remove the named parameters from the macro
4594/// definition so the positional parameters get used if that was what was
4595/// intended or change the macro to use the named parameters. It is possible
4596/// this warning will trigger when the none of the named parameters are used
4597/// and the strings like $1 are infact to simply to be passed trough unchanged.
4598void AsmParser::checkForBadMacro(SMLoc DirectiveLoc, StringRef Name,
4599 StringRef Body,
4600 ArrayRef<MCAsmMacroParameter> Parameters) {
4601 // If this macro is not defined with named parameters the warning we are
4602 // checking for here doesn't apply.
4603 unsigned NParameters = Parameters.size();
4604 if (NParameters == 0)
4605 return;
4606
4607 bool NamedParametersFound = false;
4608 bool PositionalParametersFound = false;
4609
4610 // Look at the body of the macro for use of both the named parameters and what
4611 // are likely to be positional parameters. This is what expandMacro() is
4612 // doing when it finds the parameters in the body.
4613 while (!Body.empty()) {
4614 // Scan for the next possible parameter.
4615 std::size_t End = Body.size(), Pos = 0;
4616 for (; Pos != End; ++Pos) {
4617 // Check for a substitution or escape.
4618 // This macro is defined with parameters, look for \foo, \bar, etc.
4619 if (Body[Pos] == '\\' && Pos + 1 != End)
4620 break;
4621
4622 // This macro should have parameters, but look for $0, $1, ..., $n too.
4623 if (Body[Pos] != '$' || Pos + 1 == End)
4624 continue;
4625 char Next = Body[Pos + 1];
4626 if (Next == '$' || Next == 'n' ||
4627 isdigit(static_cast<unsigned char>(Next)))
4628 break;
4629 }
4630
4631 // Check if we reached the end.
4632 if (Pos == End)
4633 break;
4634
4635 if (Body[Pos] == '$') {
4636 switch (Body[Pos + 1]) {
4637 // $$ => $
4638 case '$':
4639 break;
4640
4641 // $n => number of arguments
4642 case 'n':
4643 PositionalParametersFound = true;
4644 break;
4645
4646 // $[0-9] => argument
4647 default: {
4648 PositionalParametersFound = true;
4649 break;
4650 }
4651 }
4652 Pos += 2;
4653 } else {
4654 unsigned I = Pos + 1;
4655 while (isIdentifierChar(Body[I]) && I + 1 != End)
4656 ++I;
4657
4658 const char *Begin = Body.data() + Pos + 1;
4659 StringRef Argument(Begin, I - (Pos + 1));
4660 unsigned Index = 0;
4661 for (; Index < NParameters; ++Index)
4662 if (Parameters[Index].Name == Argument)
4663 break;
4664
4665 if (Index == NParameters) {
4666 if (Body[Pos + 1] == '(' && Body[Pos + 2] == ')')
4667 Pos += 3;
4668 else {
4669 Pos = I;
4670 }
4671 } else {
4672 NamedParametersFound = true;
4673 Pos += 1 + Argument.size();
4674 }
4675 }
4676 // Update the scan point.
4677 Body = Body.substr(Pos);
4678 }
4679
4680 if (!NamedParametersFound && PositionalParametersFound)
4681 Warning(DirectiveLoc, "macro defined with named parameters which are not "
4682 "used in macro body, possible positional parameter "
4683 "found in body which will have no effect");
4684}
4685
4686/// parseDirectiveExitMacro
4687/// ::= .exitm
4688bool AsmParser::parseDirectiveExitMacro(StringRef Directive) {
4689 if (parseEOL())
4690 return true;
4691
4692 if (!isInsideMacroInstantiation())
4693 return TokError("unexpected '" + Directive + "' in file, "
4694 "no current macro definition");
4695
4696 // Exit all conditionals that are active in the current macro.
4697 while (TheCondStack.size() != ActiveMacros.back()->CondStackDepth) {
4698 TheCondState = TheCondStack.back();
4699 TheCondStack.pop_back();
4700 }
4701
4702 handleMacroExit();
4703 return false;
4704}
4705
4706/// parseDirectiveEndMacro
4707/// ::= .endm
4708/// ::= .endmacro
4709bool AsmParser::parseDirectiveEndMacro(StringRef Directive) {
4710 if (getLexer().isNot(AsmToken::EndOfStatement))
4711 return TokError("unexpected token in '" + Directive + "' directive");
4712
4713 // If we are inside a macro instantiation, terminate the current
4714 // instantiation.
4715 if (isInsideMacroInstantiation()) {
4716 handleMacroExit();
4717 return false;
4718 }
4719
4720 // Otherwise, this .endmacro is a stray entry in the file; well formed
4721 // .endmacro directives are handled during the macro definition parsing.
4722 return TokError("unexpected '" + Directive + "' in file, "
4723 "no current macro definition");
4724}
4725
4726/// parseDirectivePurgeMacro
4727/// ::= .purgem name
4728bool AsmParser::parseDirectivePurgeMacro(SMLoc DirectiveLoc) {
4729 StringRef Name;
4730 SMLoc Loc;
4731 if (parseTokenLoc(Loc) ||
4732 check(parseIdentifier(Name), Loc,
4733 "expected identifier in '.purgem' directive") ||
4734 parseEOL())
4735 return true;
4736
4737 if (!getContext().lookupMacro(Name))
4738 return Error(DirectiveLoc, "macro '" + Name + "' is not defined");
4739
4740 getContext().undefineMacro(Name);
4741 DEBUG_WITH_TYPE("asm-macros", dbgs()do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("asm-macros")) { dbgs() << "Un-defining macro: " <<
Name << "\n"; } } while (false)
4742 << "Un-defining macro: " << Name << "\n")do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("asm-macros")) { dbgs() << "Un-defining macro: " <<
Name << "\n"; } } while (false)
;
4743 return false;
4744}
4745
4746/// parseDirectiveBundleAlignMode
4747/// ::= {.bundle_align_mode} expression
4748bool AsmParser::parseDirectiveBundleAlignMode() {
4749 // Expect a single argument: an expression that evaluates to a constant
4750 // in the inclusive range 0-30.
4751 SMLoc ExprLoc = getLexer().getLoc();
4752 int64_t AlignSizePow2;
4753 if (checkForValidSection() || parseAbsoluteExpression(AlignSizePow2) ||
4754 parseEOL() ||
4755 check(AlignSizePow2 < 0 || AlignSizePow2 > 30, ExprLoc,
4756 "invalid bundle alignment size (expected between 0 and 30)"))
4757 return true;
4758
4759 // Because of AlignSizePow2's verified range we can safely truncate it to
4760 // unsigned.
4761 getStreamer().emitBundleAlignMode(static_cast<unsigned>(AlignSizePow2));
4762 return false;
4763}
4764
4765/// parseDirectiveBundleLock
4766/// ::= {.bundle_lock} [align_to_end]
4767bool AsmParser::parseDirectiveBundleLock() {
4768 if (checkForValidSection())
4769 return true;
4770 bool AlignToEnd = false;
4771
4772 StringRef Option;
4773 SMLoc Loc = getTok().getLoc();
4774 const char *kInvalidOptionError =
4775 "invalid option for '.bundle_lock' directive";
4776
4777 if (!parseOptionalToken(AsmToken::EndOfStatement)) {
4778 if (check(parseIdentifier(Option), Loc, kInvalidOptionError) ||
4779 check(Option != "align_to_end", Loc, kInvalidOptionError) || parseEOL())
4780 return true;
4781 AlignToEnd = true;
4782 }
4783
4784 getStreamer().emitBundleLock(AlignToEnd);
4785 return false;
4786}
4787
4788/// parseDirectiveBundleLock
4789/// ::= {.bundle_lock}
4790bool AsmParser::parseDirectiveBundleUnlock() {
4791 if (checkForValidSection() || parseEOL())
4792 return true;
4793
4794 getStreamer().emitBundleUnlock();
4795 return false;
4796}
4797
4798/// parseDirectiveSpace
4799/// ::= (.skip | .space) expression [ , expression ]
4800bool AsmParser::parseDirectiveSpace(StringRef IDVal) {
4801 SMLoc NumBytesLoc = Lexer.getLoc();
4802 const MCExpr *NumBytes;
4803 if (checkForValidSection() || parseExpression(NumBytes))
4804 return true;
4805
4806 int64_t FillExpr = 0;
4807 if (parseOptionalToken(AsmToken::Comma))
4808 if (parseAbsoluteExpression(FillExpr))
4809 return true;
4810 if (parseEOL())
4811 return true;
4812
4813 // FIXME: Sometimes the fill expr is 'nop' if it isn't supplied, instead of 0.
4814 getStreamer().emitFill(*NumBytes, FillExpr, NumBytesLoc);
4815
4816 return false;
4817}
4818
4819/// parseDirectiveDCB
4820/// ::= .dcb.{b, l, w} expression, expression
4821bool AsmParser::parseDirectiveDCB(StringRef IDVal, unsigned Size) {
4822 SMLoc NumValuesLoc = Lexer.getLoc();
4823 int64_t NumValues;
4824 if (checkForValidSection() || parseAbsoluteExpression(NumValues))
4825 return true;
4826
4827 if (NumValues < 0) {
4828 Warning(NumValuesLoc, "'" + Twine(IDVal) + "' directive with negative repeat count has no effect");
4829 return false;
4830 }
4831
4832 if (parseComma())
4833 return true;
4834
4835 const MCExpr *Value;
4836 SMLoc ExprLoc = getLexer().getLoc();
4837 if (parseExpression(Value))
4838 return true;
4839
4840 // Special case constant expressions to match code generator.
4841 if (const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Value)) {
4842 assert(Size <= 8 && "Invalid size")(static_cast <bool> (Size <= 8 && "Invalid size"
) ? void (0) : __assert_fail ("Size <= 8 && \"Invalid size\""
, "/build/llvm-toolchain-snapshot-13~++20210613111130+5be314f79ba7/llvm/lib/MC/MCParser/AsmParser.cpp"
, 4842, __extension__ __PRETTY_FUNCTION__))
;
4843 uint64_t IntValue = MCE->getValue();
4844 if (!isUIntN(8 * Size, IntValue) && !isIntN(8 * Size, IntValue))
4845 return Error(ExprLoc, "literal value out of range for directive");
4846 for (uint64_t i = 0, e = NumValues; i != e; ++i)
4847 getStreamer().emitIntValue(IntValue, Size);
4848 } else {
4849 for (uint64_t i = 0, e = NumValues; i != e; ++i)
4850 getStreamer().emitValue(Value, Size, ExprLoc);
4851 }
4852
4853 return parseEOL();
4854}
4855
4856/// parseDirectiveRealDCB
4857/// ::= .dcb.{d, s} expression, expression
4858bool AsmParser::parseDirectiveRealDCB(StringRef IDVal, const fltSemantics &Semantics) {
4859 SMLoc NumValuesLoc = Lexer.getLoc();
4860 int64_t NumValues;
4861 if (checkForValidSection() || parseAbsoluteExpression(NumValues))
4862 return true;
4863
4864 if (NumValues < 0) {
4865 Warning(NumValuesLoc, "'" + Twine(IDVal) + "' directive with negative repeat count has no effect");
4866 return false;
4867 }
4868
4869 if (parseComma())
4870 return true;
4871
4872 APInt AsInt;
4873 if (parseRealValue(Semantics, AsInt) || parseEOL())
4874 return true;
4875
4876 for (uint64_t i = 0, e = NumValues; i != e; ++i)
4877 getStreamer().emitIntValue(AsInt.getLimitedValue(),
4878 AsInt.getBitWidth() / 8);
4879
4880 return false;
4881}
4882
4883/// parseDirectiveDS
4884/// ::= .ds.{b, d, l, p, s, w, x} expression
4885bool AsmParser::parseDirectiveDS(StringRef IDVal, unsigned Size) {
4886 SMLoc NumValuesLoc = Lexer.getLoc();
4887 int64_t NumValues;
4888 if (checkForValidSection() || parseAbsoluteExpression(NumValues) ||
4889 parseEOL())
4890 return true;
4891
4892 if (NumValues < 0) {
4893 Warning(NumValuesLoc, "'" + Twine(IDVal) + "' directive with negative repeat count has no effect");
4894 return false;
4895 }
4896
4897 for (uint64_t i = 0, e = NumValues; i != e; ++i)
4898 getStreamer().emitFill(Size, 0);
4899
4900 return false;
4901}
4902
4903/// parseDirectiveLEB128
4904/// ::= (.sleb128 | .uleb128) [ expression (, expression)* ]
4905bool AsmParser::parseDirectiveLEB128(bool Signed) {
4906 if (checkForValidSection())
4907 return true;
4908
4909 auto parseOp = [&]() -> bool {
4910 const MCExpr *Value;
4911 if (parseExpression(Value))
4912 return true;
4913 if (Signed)
4914 getStreamer().emitSLEB128Value(Value);
4915 else
4916 getStreamer().emitULEB128Value(Value);
4917 return false;
4918 };
4919
4920 return parseMany(parseOp);
4921}
4922
4923/// parseDirectiveSymbolAttribute
4924/// ::= { ".globl", ".weak", ... } [ identifier ( , identifier )* ]
4925bool AsmParser::parseDirectiveSymbolAttribute(MCSymbolAttr Attr) {
4926 auto parseOp = [&]() -> bool {
4927 StringRef Name;
4928 SMLoc Loc = getTok().getLoc();
4929 if (parseIdentifier(Name))
4930 return Error(Loc, "expected identifier");
4931
4932 if (discardLTOSymbol(Name))
4933 return false;
4934
4935 MCSymbol *Sym = getContext().getOrCreateSymbol(Name);
4936
4937 // Assembler local symbols don't make any sense here. Complain loudly.
4938 if (Sym->isTemporary())
4939 return Error(Loc, "non-local symbol required");
4940
4941 if (!getStreamer().emitSymbolAttribute(Sym, Attr))
4942 return Error(Loc, "unable to emit symbol attribute");
4943 return false;
4944 };
4945
4946 return parseMany(parseOp);
4947}
4948
4949/// parseDirectiveComm
4950/// ::= ( .comm | .lcomm ) identifier , size_expression [ , align_expression ]
4951bool AsmParser::parseDirectiveComm(bool IsLocal) {
4952 if (checkForValidSection())
4953 return true;
4954
4955 SMLoc IDLoc = getLexer().getLoc();
4956 StringRef Name;
4957 if (parseIdentifier(Name))
4958 return TokError("expected identifier in directive");
4959
4960 // Handle the identifier as the key symbol.
4961 MCSymbol *Sym = getContext().getOrCreateSymbol(Name);
4962
4963 if (parseComma())
4964 return true;
4965
4966 int64_t Size;
4967 SMLoc SizeLoc = getLexer().getLoc();
4968 if (parseAbsoluteExpression(Size))
4969 return true;
4970
4971 int64_t Pow2Alignment = 0;
4972 SMLoc Pow2AlignmentLoc;
4973 if (getLexer().is(AsmToken::Comma)) {
4974 Lex();
4975 Pow2AlignmentLoc = getLexer().getLoc();
4976 if (parseAbsoluteExpression(Pow2Alignment))
4977 return true;
4978
4979 LCOMM::LCOMMType LCOMM = Lexer.getMAI().getLCOMMDirectiveAlignmentType();
4980 if (IsLocal && LCOMM == LCOMM::NoAlignment)
4981 return Error(Pow2AlignmentLoc, "alignment not supported on this target");
4982
4983 // If this target takes alignments in bytes (not log) validate and convert.
4984 if ((!IsLocal && Lexer.getMAI().getCOMMDirectiveAlignmentIsInBytes()) ||
4985 (IsLocal && LCOMM == LCOMM::ByteAlignment)) {
4986 if (!isPowerOf2_64(Pow2Alignment))
4987 return Error(Pow2AlignmentLoc, "alignment must be a power of 2");
4988 Pow2Alignment = Log2_64(Pow2Alignment);
4989 }
4990 }
4991
4992 if (parseEOL())
4993 return true;
4994
4995 // NOTE: a size of zero for a .comm should create a undefined symbol
4996 // but a size of .lcomm creates a bss symbol of size zero.
4997 if (Size < 0)
4998 return Error(SizeLoc, "invalid '.comm' or '.lcomm' directive size, can't "
4999 "be less than zero");
5000
5001 // NOTE: The alignment in the directive is a power of 2 value, the assembler
5002 // may internally end up wanting an alignment in bytes.
5003 // FIXME: Diagnose overflow.
5004 if (Pow2Alignment < 0)
5005 return Error(Pow2AlignmentLoc, "invalid '.comm' or '.lcomm' directive "
5006 "alignment, can't be less than zero");
5007
5008 Sym->redefineIfPossible();
5009 if (!Sym->isUndefined())
5010 return Error(IDLoc, "invalid symbol redefinition");
5011
5012 // Create the Symbol as a common or local common with Size and Pow2Alignment
5013 if (IsLocal) {
5014 getStreamer().emitLocalCommonSymbol(Sym, Size, 1 << Pow2Alignment);
5015 return false;
5016 }
5017
5018 getStreamer().emitCommonSymbol(Sym, Size, 1 << Pow2Alignment);
5019 return false;
5020}
5021
5022/// parseDirectiveAbort
5023/// ::= .abort [... message ...]
5024bool AsmParser::parseDirectiveAbort() {
5025 // FIXME: Use loc from directive.
5026 SMLoc Loc = getLexer().getLoc();
5027
5028 StringRef Str = parseStringToEndOfStatement();
5029 if (parseEOL())
5030 return true;
5031
5032 if (Str.empty())
5033 return Error(Loc, ".abort detected. Assembly stopping.");
5034 else
5035 return Error(Loc, ".abort '" + Str + "' detected. Assembly stopping.");
5036 // FIXME: Actually abort assembly here.
5037
5038 return false;
5039}
5040
5041/// parseDirectiveInclude
5042/// ::= .include "filename"
5043bool AsmParser::parseDirectiveInclude() {
5044 // Allow the strings to have escaped octal character sequence.
5045 std::string Filename;
5046 SMLoc IncludeLoc = getTok().getLoc();
5047
5048 if (check(getTok().isNot(AsmToken::String),
5049 "expected string in '.include' directive") ||
5050 parseEscapedString(Filename) ||
5051 check(getTok().isNot(AsmToken::EndOfStatement),
5052 "unexpected token in '.include' directive") ||
5053 // Attempt to switch the lexer to the included file before consuming the
5054 // end of statement to avoid losing it when we switch.
5055 check(enterIncludeFile(Filename), IncludeLoc,
5056 "Could not find include file '" + Filename + "'"))
5057 return true;
5058
5059 return false;
5060}
5061
5062/// parseDirectiveIncbin
5063/// ::= .incbin "filename" [ , skip [ , count ] ]
5064bool AsmParser::parseDirectiveIncbin() {
5065 // Allow the strings to have escaped octal character sequence.
5066 std::string Filename;
5067 SMLoc IncbinLoc = getTok().getLoc();
5068 if (check(getTok().isNot(AsmToken::String),
5069 "expected string in '.incbin' directive") ||
5070 parseEscapedString(Filename))
5071 return true;
5072
5073 int64_t Skip = 0;
5074 const MCExpr *Count = nullptr;
5075 SMLoc SkipLoc, CountLoc;
5076 if (parseOptionalToken(AsmToken::Comma)) {
5077 // The skip expression can be omitted while specifying the count, e.g:
5078 // .incbin "filename",,4
5079 if (getTok().isNot(AsmToken::Comma)) {
5080 if (parseTokenLoc(SkipLoc) || parseAbsoluteExpression(Skip))
5081 return true;
5082 }
5083 if (parseOptionalToken(AsmToken::Comma)) {
5084 CountLoc = getTok().getLoc();
5085 if (parseExpression(Count))
5086 return true;
5087 }
5088 }
5089
5090 if (parseEOL())
5091 return true;
5092
5093 if (check(Skip < 0, SkipLoc, "skip is negative"))
5094 return true;
5095
5096 // Attempt to process the included file.
5097 if (processIncbinFile(Filename, Skip, Count, CountLoc))
5098 return Error(IncbinLoc, "Could not find incbin file '" + Filename + "'");
5099 return false;
5100}
5101
5102/// parseDirectiveIf
5103/// ::= .if{,eq,ge,gt,le,lt,ne} expression
5104bool AsmParser::parseDirectiveIf(SMLoc DirectiveLoc, DirectiveKind DirKind) {
5105 TheCondStack.push_back(TheCondState);
5106 TheCondState.TheCond = AsmCond::IfCond;
5107 if (TheCondState.Ignore) {
5108 eatToEndOfStatement();
5109 } else {
5110 int64_t ExprValue;
5111 if (parseAbsoluteExpression(ExprValue) || parseEOL())
5112 return true;
5113
5114 switch (DirKind) {
5115 default:
5116 llvm_unreachable("unsupported directive")::llvm::llvm_unreachable_internal("unsupported directive", "/build/llvm-toolchain-snapshot-13~++20210613111130+5be314f79ba7/llvm/lib/MC/MCParser/AsmParser.cpp"
, 5116)
;
5117 case DK_IF:
5118 case DK_IFNE:
5119 break;
5120 case DK_IFEQ:
5121 ExprValue = ExprValue == 0;
5122 break;
5123 case DK_IFGE:
5124 ExprValue = ExprValue >= 0;
5125 break;
5126 case DK_IFGT:
5127 ExprValue = ExprValue > 0;
5128 break;
5129 case DK_IFLE:
5130 ExprValue = ExprValue <= 0;
5131 break;
5132 case DK_IFLT:
5133 ExprValue = ExprValue < 0;
5134 break;
5135 }
5136
5137 TheCondState.CondMet = ExprValue;
5138 TheCondState.Ignore = !TheCondState.CondMet;
5139 }
5140
5141 return false;
5142}
5143
5144/// parseDirectiveIfb
5145/// ::= .ifb string
5146bool AsmParser::parseDirectiveIfb(SMLoc DirectiveLoc, bool ExpectBlank) {
5147 TheCondStack.push_back(TheCondState);
5148 TheCondState.TheCond = AsmCond::IfCond;
5149
5150 if (TheCondState.Ignore) {
5151 eatToEndOfStatement();
5152 } else {
5153 StringRef Str = parseStringToEndOfStatement();
5154
5155 if (parseEOL())
5156 return true;
5157
5158 TheCondState.CondMet = ExpectBlank == Str.empty();
5159 TheCondState.Ignore = !TheCondState.CondMet;
5160 }
5161
5162 return false;
5163}
5164
5165/// parseDirectiveIfc
5166/// ::= .ifc string1, string2
5167/// ::= .ifnc string1, string2
5168bool AsmParser::parseDirectiveIfc(SMLoc DirectiveLoc, bool ExpectEqual) {
5169 TheCondStack.push_back(TheCondState);
5170 TheCondState.TheCond = AsmCond::IfCond;
5171
5172 if (TheCondState.Ignore) {
5173 eatToEndOfStatement();
5174 } else {
5175 StringRef Str1 = parseStringToComma();
5176
5177 if (parseComma())
5178 return true;
5179
5180 StringRef Str2 = parseStringToEndOfStatement();
5181
5182 if (parseEOL())
5183 return true;
5184
5185 TheCondState.CondMet = ExpectEqual == (Str1.trim() == Str2.trim());
5186 TheCondState.Ignore = !TheCondState.CondMet;
5187 }
5188
5189 return false;
5190}
5191
5192/// parseDirectiveIfeqs
5193/// ::= .ifeqs string1, string2
5194bool AsmParser::parseDirectiveIfeqs(SMLoc DirectiveLoc, bool ExpectEqual) {
5195 if (Lexer.isNot(AsmToken::String)) {
5196 if (ExpectEqual)
5197 return TokError("expected string parameter for '.ifeqs' directive");
5198 return TokError("expected string parameter for '.ifnes' directive");
5199 }
5200
5201 StringRef String1 = getTok().getStringContents();
5202 Lex();
5203
5204 if (Lexer.isNot(AsmToken::Comma)) {
5205 if (ExpectEqual)
5206 return TokError(
5207 "expected comma after first string for '.ifeqs' directive");
5208 return TokError("expected comma after first string for '.ifnes' directive");
5209 }
5210
5211 Lex();
5212
5213 if (Lexer.isNot(AsmToken::String)) {
5214 if (ExpectEqual)
5215 return TokError("expected string parameter for '.ifeqs' directive");
5216 return TokError("expected string parameter for '.ifnes' directive");
5217 }
5218
5219 StringRef String2 = getTok().getStringContents();
5220 Lex();
5221
5222 TheCondStack.push_back(TheCondState);
5223 TheCondState.TheCond = AsmCond::IfCond;
5224 TheCondState.CondMet = ExpectEqual == (String1 == String2);
5225 TheCondState.Ignore = !TheCondState.CondMet;
5226
5227 return false;
5228}
5229
5230/// parseDirectiveIfdef
5231/// ::= .ifdef symbol
5232bool AsmParser::parseDirectiveIfdef(SMLoc DirectiveLoc, bool expect_defined) {
5233 StringRef Name;
5234 TheCondStack.push_back(TheCondState);
5235 TheCondState.TheCond = AsmCond::IfCond;
5236
5237 if (TheCondState.Ignore) {
5238 eatToEndOfStatement();
5239 } else {
5240 if (check(parseIdentifier(Name), "expected identifier after '.ifdef'") ||
5241 parseEOL())
5242 return true;
5243
5244 MCSymbol *Sym = getContext().lookupSymbol(Name);
5245
5246 if (expect_defined)
5247 TheCondState.CondMet = (Sym && !Sym->isUndefined(false));
5248 else
5249 TheCondState.CondMet = (!Sym || Sym->isUndefined(false));
5250 TheCondState.Ignore = !TheCondState.CondMet;
5251 }
5252
5253 return false;
5254}
5255
5256/// parseDirectiveElseIf
5257/// ::= .elseif expression
5258bool AsmParser::parseDirectiveElseIf(SMLoc DirectiveLoc) {
5259 if (TheCondState.TheCond != AsmCond::IfCond &&
5260 TheCondState.TheCond != AsmCond::ElseIfCond)
5261 return Error(DirectiveLoc, "Encountered a .elseif that doesn't follow an"
5262 " .if or an .elseif");
5263 TheCondState.TheCond = AsmCond::ElseIfCond;
5264
5265 bool LastIgnoreState = false;
5266 if (!TheCondStack.empty())
5267 LastIgnoreState = TheCondStack.back().Ignore;
5268 if (LastIgnoreState || TheCondState.CondMet) {
5269 TheCondState.Ignore = true;
5270 eatToEndOfStatement();
5271 } else {
5272 int64_t ExprValue;
5273 if (parseAbsoluteExpression(ExprValue))
5274 return true;
5275
5276 if (parseEOL())
5277 return true;
5278
5279 TheCondState.CondMet = ExprValue;
5280 TheCondState.Ignore = !TheCondState.CondMet;
5281 }
5282
5283 return false;
5284}
5285
5286/// parseDirectiveElse
5287/// ::= .else
5288bool AsmParser::parseDirectiveElse(SMLoc DirectiveLoc) {
5289 if (parseEOL())
5290 return true;
5291
5292 if (TheCondState.TheCond != AsmCond::IfCond &&
5293 TheCondState.TheCond != AsmCond::ElseIfCond)
5294 return Error(DirectiveLoc, "Encountered a .else that doesn't follow "
5295 " an .if or an .elseif");
5296 TheCondState.TheCond = AsmCond::ElseCond;
5297 bool LastIgnoreState = false;
5298 if (!TheCondStack.empty())
5299 LastIgnoreState = TheCondStack.back().Ignore;
5300 if (LastIgnoreState || TheCondState.CondMet)
5301 TheCondState.Ignore = true;
5302 else
5303 TheCondState.Ignore = false;
5304
5305 return false;
5306}
5307
5308/// parseDirectiveEnd
5309/// ::= .end
5310bool AsmParser::parseDirectiveEnd(SMLoc DirectiveLoc) {
5311 if (parseEOL())
5312 return true;
5313
5314 while (Lexer.isNot(AsmToken::Eof))
5315 Lexer.Lex();
5316
5317 return false;
5318}
5319
5320/// parseDirectiveError
5321/// ::= .err
5322/// ::= .error [string]
5323bool AsmParser::parseDirectiveError(SMLoc L, bool WithMessage) {
5324 if (!TheCondStack.empty()) {
5325 if (TheCondStack.back().Ignore) {
5326 eatToEndOfStatement();
5327 return false;
5328 }
5329 }
5330
5331 if (!WithMessage)
5332 return Error(L, ".err encountered");
5333
5334 StringRef Message = ".error directive invoked in source file";
5335 if (Lexer.isNot(AsmToken::EndOfStatement)) {
5336 if (Lexer.isNot(AsmToken::String))
5337 return TokError(".error argument must be a string");
5338
5339 Message = getTok().getStringContents();
5340 Lex();
5341 }
5342
5343 return Error(L, Message);
5344}
5345
5346/// parseDirectiveWarning
5347/// ::= .warning [string]
5348bool AsmParser::parseDirectiveWarning(SMLoc L) {
5349 if (!TheCondStack.empty()) {
5350 if (TheCondStack.back().Ignore) {
5351 eatToEndOfStatement();
5352 return false;
5353 }
5354 }
5355
5356 StringRef Message = ".warning directive invoked in source file";
5357
5358 if (!parseOptionalToken(AsmToken::EndOfStatement)) {
5359 if (Lexer.isNot(AsmToken::String))
5360 return TokError(".warning argument must be a string");
5361
5362 Message = getTok().getStringContents();
5363 Lex();
5364 if (parseEOL())
5365 return true;
5366 }
5367
5368 return Warning(L, Message);
5369}
5370
5371/// parseDirectiveEndIf
5372/// ::= .endif
5373bool AsmParser::parseDirectiveEndIf(SMLoc DirectiveLoc) {
5374 if (parseEOL())
5375 return true;
5376
5377 if ((TheCondState.TheCond == AsmCond::NoCond) || TheCondStack.empty())
5378 return Error(DirectiveLoc, "Encountered a .endif that doesn't follow "
5379 "an .if or .else");
5380 if (!TheCondStack.empty()) {
5381 TheCondState = TheCondStack.back();
5382 TheCondStack.pop_back();
5383 }
5384
5385 return false;
5386}
5387
5388void AsmParser::initializeDirectiveKindMap() {
5389 /* Lookup will be done with the directive
5390 * converted to lower case, so all these
5391 * keys should be lower case.
5392 * (target specific directives are handled
5393 * elsewhere)
5394 */
5395 DirectiveKindMap[".set"] = DK_SET;
5396 DirectiveKindMap[".equ"] = DK_EQU;
5397 DirectiveKindMap[".equiv"] = DK_EQUIV;
5398 DirectiveKindMap[".ascii"] = DK_ASCII;
5399 DirectiveKindMap[".asciz"] = DK_ASCIZ;
5400 DirectiveKindMap[".string"] = DK_STRING;
5401 DirectiveKindMap[".byte"] = DK_BYTE;
5402 DirectiveKindMap[".short"] = DK_SHORT;
5403 DirectiveKindMap[".value"] = DK_VALUE;
5404 DirectiveKindMap[".2byte"] = DK_2BYTE;
5405 DirectiveKindMap[".long"] = DK_LONG;
5406 DirectiveKindMap[".int"] = DK_INT;
5407 DirectiveKindMap[".4byte"] = DK_4BYTE;
5408 DirectiveKindMap[".quad"] = DK_QUAD;
5409 DirectiveKindMap[".8byte"] = DK_8BYTE;
5410 DirectiveKindMap[".octa"] = DK_OCTA;
5411 DirectiveKindMap[".single"] = DK_SINGLE;
5412 DirectiveKindMap[".float"] = DK_FLOAT;
5413 DirectiveKindMap[".double"] = DK_DOUBLE;
5414 DirectiveKindMap[".align"] = DK_ALIGN;
5415 DirectiveKindMap[".align32"] = DK_ALIGN32;
5416 DirectiveKindMap[".balign"] = DK_BALIGN;
5417 DirectiveKindMap[".balignw"] = DK_BALIGNW;
5418 DirectiveKindMap[".balignl"] = DK_BALIGNL;
5419 DirectiveKindMap[".p2align"] = DK_P2ALIGN;
5420 DirectiveKindMap[".p2alignw"] = DK_P2ALIGNW;
5421 DirectiveKindMap[".p2alignl"] = DK_P2ALIGNL;
5422 DirectiveKindMap[".org"] = DK_ORG;
5423 DirectiveKindMap[".fill"] = DK_FILL;
5424 DirectiveKindMap[".zero"] = DK_ZERO;
5425 DirectiveKindMap[".extern"] = DK_EXTERN;
5426 DirectiveKindMap[".globl"] = DK_GLOBL;
5427 DirectiveKindMap[".global"] = DK_GLOBAL;
5428 DirectiveKindMap[".lazy_reference"] = DK_LAZY_REFERENCE;
5429 DirectiveKindMap[".no_dead_strip"] = DK_NO_DEAD_STRIP;
5430 DirectiveKindMap[".symbol_resolver"] = DK_SYMBOL_RESOLVER;
5431 DirectiveKindMap[".private_extern"] = DK_PRIVATE_EXTERN;
5432 DirectiveKindMap[".reference"] = DK_REFERENCE;
5433 DirectiveKindMap[".weak_definition"] = DK_WEAK_DEFINITION;
5434 DirectiveKindMap[".weak_reference"] = DK_WEAK_REFERENCE;
5435 DirectiveKindMap[".weak_def_can_be_hidden"] = DK_WEAK_DEF_CAN_BE_HIDDEN;
5436 DirectiveKindMap[".cold"] = DK_COLD;
5437 DirectiveKindMap[".comm"] = DK_COMM;
5438 DirectiveKindMap[".common"] = DK_COMMON;
5439 DirectiveKindMap[".lcomm"] = DK_LCOMM;
5440 DirectiveKindMap[".abort"] = DK_ABORT;
5441 DirectiveKindMap[".include"] = DK_INCLUDE;
5442 DirectiveKindMap[".incbin"] = DK_INCBIN;
5443 DirectiveKindMap[".code16"] = DK_CODE16;
5444 DirectiveKindMap[".code16gcc"] = DK_CODE16GCC;
5445 DirectiveKindMap[".rept"] = DK_REPT;
5446 DirectiveKindMap[".rep"] = DK_REPT;
5447 DirectiveKindMap[".irp"] = DK_IRP;
5448 DirectiveKindMap[".irpc"] = DK_IRPC;
5449 DirectiveKindMap[".endr"] = DK_ENDR;
5450 DirectiveKindMap[".bundle_align_mode"] = DK_BUNDLE_ALIGN_MODE;
5451 DirectiveKindMap[".bundle_lock"] = DK_BUNDLE_LOCK;
5452 DirectiveKindMap[".bundle_unlock"] = DK_BUNDLE_UNLOCK;
5453 DirectiveKindMap[".if"] = DK_IF;
5454 DirectiveKindMap[".ifeq"] = DK_IFEQ;
5455 DirectiveKindMap[".ifge"] = DK_IFGE;
5456 DirectiveKindMap[".ifgt"] = DK_IFGT;
5457 DirectiveKindMap[".ifle"] = DK_IFLE;
5458 DirectiveKindMap[".iflt"] = DK_IFLT;
5459 DirectiveKindMap[".ifne"] = DK_IFNE;
5460 DirectiveKindMap[".ifb"] = DK_IFB;
5461 DirectiveKindMap[".ifnb"] = DK_IFNB;
5462 DirectiveKindMap[".ifc"] = DK_IFC;
5463 DirectiveKindMap[".ifeqs"] = DK_IFEQS;
5464 DirectiveKindMap[".ifnc"] = DK_IFNC;
5465 DirectiveKindMap[".ifnes"] = DK_IFNES;
5466 DirectiveKindMap[".ifdef"] = DK_IFDEF;
5467 DirectiveKindMap[".ifndef"] = DK_IFNDEF;
5468 DirectiveKindMap[".ifnotdef"] = DK_IFNOTDEF;
5469 DirectiveKindMap[".elseif"] = DK_ELSEIF;
5470 DirectiveKindMap[".else"] = DK_ELSE;
5471 DirectiveKindMap[".end"] = DK_END;
5472 DirectiveKindMap[".endif"] = DK_ENDIF;
5473 DirectiveKindMap[".skip"] = DK_SKIP;
5474 DirectiveKindMap[".space"] = DK_SPACE;
5475 DirectiveKindMap[".file"] = DK_FILE;
5476 DirectiveKindMap[".line"] = DK_LINE;
5477 DirectiveKindMap[".loc"] = DK_LOC;
5478 DirectiveKindMap[".stabs"] = DK_STABS;
5479 DirectiveKindMap[".cv_file"] = DK_CV_FILE;
5480 DirectiveKindMap[".cv_func_id"] = DK_CV_FUNC_ID;
5481 DirectiveKindMap[".cv_loc"] = DK_CV_LOC;
5482 DirectiveKindMap[".cv_linetable"] = DK_CV_LINETABLE;
5483 DirectiveKindMap[".cv_inline_linetable"] = DK_CV_INLINE_LINETABLE;
5484 DirectiveKindMap[".cv_inline_site_id"] = DK_CV_INLINE_SITE_ID;
5485 DirectiveKindMap[".cv_def_range"] = DK_CV_DEF_RANGE;
5486 DirectiveKindMap[".cv_string"] = DK_CV_STRING;
5487 DirectiveKindMap[".cv_stringtable"] = DK_CV_STRINGTABLE;
5488 DirectiveKindMap[".cv_filechecksums"] = DK_CV_FILECHECKSUMS;
5489 DirectiveKindMap[".cv_filechecksumoffset"] = DK_CV_FILECHECKSUM_OFFSET;
5490 DirectiveKindMap[".cv_fpo_data"] = DK_CV_FPO_DATA;
5491 DirectiveKindMap[".sleb128"] = DK_SLEB128;
5492 DirectiveKindMap[".uleb128"] = DK_ULEB128;
5493 DirectiveKindMap[".cfi_sections"] = DK_CFI_SECTIONS;
5494 DirectiveKindMap[".cfi_startproc"] = DK_CFI_STARTPROC;
5495 DirectiveKindMap[".cfi_endproc"] = DK_CFI_ENDPROC;
5496 DirectiveKindMap[".cfi_def_cfa"] = DK_CFI_DEF_CFA;
5497 DirectiveKindMap[".cfi_def_cfa_offset"] = DK_CFI_DEF_CFA_OFFSET;
5498 DirectiveKindMap[".cfi_adjust_cfa_offset"] = DK_CFI_ADJUST_CFA_OFFSET;
5499 DirectiveKindMap[".cfi_def_cfa_register"] = DK_CFI_DEF_CFA_REGISTER;
5500 DirectiveKindMap[".cfi_offset"] = DK_CFI_OFFSET;
5501 DirectiveKindMap[".cfi_rel_offset"] = DK_CFI_REL_OFFSET;
5502 DirectiveKindMap[".cfi_personality"] = DK_CFI_PERSONALITY;
5503 DirectiveKindMap[".cfi_lsda"] = DK_CFI_LSDA;
5504 DirectiveKindMap[".cfi_remember_state"] = DK_CFI_REMEMBER_STATE;
5505 DirectiveKindMap[".cfi_restore_state"] = DK_CFI_RESTORE_STATE;
5506 DirectiveKindMap[".cfi_same_value"] = DK_CFI_SAME_VALUE;
5507 DirectiveKindMap[".cfi_restore"] = DK_CFI_RESTORE;
5508 DirectiveKindMap[".cfi_escape"] = DK_CFI_ESCAPE;
5509 DirectiveKindMap[".cfi_return_column"] = DK_CFI_RETURN_COLUMN;
5510 DirectiveKindMap[".cfi_signal_frame"] = DK_CFI_SIGNAL_FRAME;
5511 DirectiveKindMap[".cfi_undefined"] = DK_CFI_UNDEFINED;
5512 DirectiveKindMap[".cfi_register"] = DK_CFI_REGISTER;
5513 DirectiveKindMap[".cfi_window_save"] = DK_CFI_WINDOW_SAVE;
5514 DirectiveKindMap[".cfi_b_key_frame"] = DK_CFI_B_KEY_FRAME;
5515 DirectiveKindMap[".macros_on"] = DK_MACROS_ON;
5516 DirectiveKindMap[".macros_off"] = DK_MACROS_OFF;
5517 DirectiveKindMap[".macro"] = DK_MACRO;
5518 DirectiveKindMap[".exitm"] = DK_EXITM;
5519 DirectiveKindMap[".endm"] = DK_ENDM;
5520 DirectiveKindMap[".endmacro"] = DK_ENDMACRO;
5521 DirectiveKindMap[".purgem"] = DK_PURGEM;
5522 DirectiveKindMap[".err"] = DK_ERR;
5523 DirectiveKindMap[".error"] = DK_ERROR;
5524 DirectiveKindMap[".warning"] = DK_WARNING;
5525 DirectiveKindMap[".altmacro"] = DK_ALTMACRO;
5526 DirectiveKindMap[".noaltmacro"] = DK_NOALTMACRO;
5527 DirectiveKindMap[".reloc"] = DK_RELOC;
5528 DirectiveKindMap[".dc"] = DK_DC;
5529 DirectiveKindMap[".dc.a"] = DK_DC_A;
5530 DirectiveKindMap[".dc.b"] = DK_DC_B;
5531 DirectiveKindMap[".dc.d"] = DK_DC_D;
5532 DirectiveKindMap[".dc.l"] = DK_DC_L;
5533 DirectiveKindMap[".dc.s"] = DK_DC_S;
5534 DirectiveKindMap[".dc.w"] = DK_DC_W;
5535 DirectiveKindMap[".dc.x"] = DK_DC_X;
5536 DirectiveKindMap[".dcb"] = DK_DCB;
5537 DirectiveKindMap[".dcb.b"] = DK_DCB_B;
5538 DirectiveKindMap[".dcb.d"] = DK_DCB_D;
5539 DirectiveKindMap[".dcb.l"] = DK_DCB_L;
5540 DirectiveKindMap[".dcb.s"] = DK_DCB_S;
5541 DirectiveKindMap[".dcb.w"] = DK_DCB_W;
5542 DirectiveKindMap[".dcb.x"] = DK_DCB_X;
5543 DirectiveKindMap[".ds"] = DK_DS;
5544 DirectiveKindMap[".ds.b"] = DK_DS_B;
5545 DirectiveKindMap[".ds.d"] = DK_DS_D;
5546 DirectiveKindMap[".ds.l"] = DK_DS_L;
5547 DirectiveKindMap[".ds.p"] = DK_DS_P;
5548 DirectiveKindMap[".ds.s"] = DK_DS_S;
5549 DirectiveKindMap[".ds.w"] = DK_DS_W;
5550 DirectiveKindMap[".ds.x"] = DK_DS_X;
5551 DirectiveKindMap[".print"] = DK_PRINT;
5552 DirectiveKindMap[".addrsig"] = DK_ADDRSIG;
5553 DirectiveKindMap[".addrsig_sym"] = DK_ADDRSIG_SYM;
5554 DirectiveKindMap[".pseudoprobe"] = DK_PSEUDO_PROBE;
5555 DirectiveKindMap[".lto_discard"] = DK_LTO_DISCARD;
5556}
5557
5558MCAsmMacro *AsmParser::parseMacroLikeBody(SMLoc DirectiveLoc) {
5559 AsmToken EndToken, StartToken = getTok();
5560
5561 unsigned NestLevel = 0;
5562 while (true) {
5563 // Check whether we have reached the end of the file.
5564 if (getLexer().is(AsmToken::Eof)) {
5565 printError(DirectiveLoc, "no matching '.endr' in definition");
5566 return nullptr;
5567 }
5568
5569 if (Lexer.is(AsmToken::Identifier) &&
5570 (getTok().getIdentifier() == ".rep" ||
5571 getTok().getIdentifier() == ".rept" ||
5572 getTok().getIdentifier() == ".irp" ||
5573 getTok().getIdentifier() == ".irpc")) {
5574 ++NestLevel;
5575 }
5576
5577 // Otherwise, check whether we have reached the .endr.
5578 if (Lexer.is(AsmToken::Identifier) && getTok().getIdentifier() == ".endr") {
5579 if (NestLevel == 0) {
5580 EndToken = getTok();
5581 Lex();
5582 if (Lexer.isNot(AsmToken::EndOfStatement)) {
5583 printError(getTok().getLoc(),
5584 "unexpected token in '.endr' directive");
5585 return nullptr;
5586 }
5587 break;
5588 }
5589 --NestLevel;
5590 }
5591
5592 // Otherwise, scan till the end of the statement.
5593 eatToEndOfStatement();
5594 }
5595
5596 const char *BodyStart = StartToken.getLoc().getPointer();
5597 const char *BodyEnd = EndToken.getLoc().getPointer();
5598 StringRef Body = StringRef(BodyStart, BodyEnd - BodyStart);
5599
5600 // We Are Anonymous.
5601 MacroLikeBodies.emplace_back(StringRef(), Body, MCAsmMacroParameters());
5602 return &MacroLikeBodies.back();
5603}
5604
5605void AsmParser::instantiateMacroLikeBody(MCAsmMacro *M, SMLoc DirectiveLoc,
5606 raw_svector_ostream &OS) {
5607 OS << ".endr\n";
5608
5609 std::unique_ptr<MemoryBuffer> Instantiation =
5610 MemoryBuffer::getMemBufferCopy(OS.str(), "<instantiation>");
5611
5612 // Create the macro instantiation object and add to the current macro
5613 // instantiation stack.
5614 MacroInstantiation *MI = new MacroInstantiation{
5615 DirectiveLoc, CurBuffer, getTok().getLoc(), TheCondStack.size()};
5616 ActiveMacros.push_back(MI);
5617
5618 // Jump to the macro instantiation and prime the lexer.
5619 CurBuffer = SrcMgr.AddNewSourceBuffer(std::move(Instantiation), SMLoc());
5620 Lexer.setBuffer(SrcMgr.getMemoryBuffer(CurBuffer)->getBuffer());
5621 Lex();
5622}
5623
5624/// parseDirectiveRept
5625/// ::= .rep | .rept count
5626bool AsmParser::parseDirectiveRept(SMLoc DirectiveLoc, StringRef Dir) {
5627 const MCExpr *CountExpr;
5628 SMLoc CountLoc = getTok().getLoc();
5629 if (parseExpression(CountExpr))
5630 return true;
5631
5632 int64_t Count;
5633 if (!CountExpr->evaluateAsAbsolute(Count, getStreamer().getAssemblerPtr())) {
5634 return Error(CountLoc, "unexpected token in '" + Dir + "' directive");
5635 }
5636
5637 if (check(Count < 0, CountLoc, "Count is negative") || parseEOL())
5638 return true;
5639
5640 // Lex the rept definition.
5641 MCAsmMacro *M = parseMacroLikeBody(DirectiveLoc);
5642 if (!M)
5643 return true;
5644
5645 // Macro instantiation is lexical, unfortunately. We construct a new buffer
5646 // to hold the macro body with substitutions.
5647 SmallString<256> Buf;
5648 raw_svector_ostream OS(Buf);
5649 while (Count--) {
5650 // Note that the AtPseudoVariable is disabled for instantiations of .rep(t).
5651 if (expandMacro(OS, M->Body, None, None, false, getTok().getLoc()))
5652 return true;
5653 }
5654 instantiateMacroLikeBody(M, DirectiveLoc, OS);
5655
5656 return false;
5657}
5658
5659/// parseDirectiveIrp
5660/// ::= .irp symbol,values
5661bool AsmParser::parseDirectiveIrp(SMLoc DirectiveLoc) {
5662 MCAsmMacroParameter Parameter;
5663 MCAsmMacroArguments A;
5664 if (check(parseIdentifier(Parameter.Name),
5665 "expected identifier in '.irp' directive") ||
5666 parseComma() || parseMacroArguments(nullptr, A) || parseEOL())
5667 return true;
5668
5669 // Lex the irp 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
5679 for (const MCAsmMacroArgument &Arg : A) {
5680 // Note that the AtPseudoVariable is enabled for instantiations of .irp.
5681 // This is undocumented, but GAS seems to support it.
5682 if (expandMacro(OS, M->Body, Parameter, Arg, true, getTok().getLoc()))
5683 return true;
5684 }
5685
5686 instantiateMacroLikeBody(M, DirectiveLoc, OS);
5687
5688 return false;
5689}
5690
5691/// parseDirectiveIrpc
5692/// ::= .irpc symbol,values
5693bool AsmParser::parseDirectiveIrpc(SMLoc DirectiveLoc) {
5694 MCAsmMacroParameter Parameter;
5695 MCAsmMacroArguments A;
5696
5697 if (check(parseIdentifier(Parameter.Name),
5698 "expected identifier in '.irpc' directive") ||
5699 parseComma() || parseMacroArguments(nullptr, A))
5700 return true;
5701
5702 if (A.size() != 1 || A.front().size() != 1)
5703 return TokError("unexpected token in '.irpc' directive");
5704 if (parseEOL())
5705 return true;
5706
5707 // Lex the irpc definition.
5708 MCAsmMacro *M = parseMacroLikeBody(DirectiveLoc);
5709 if (!M)
5710 return true;
5711
5712 // Macro instantiation is lexical, unfortunately. We construct a new buffer
5713 // to hold the macro body with substitutions.
5714 SmallString<256> Buf;
5715 raw_svector_ostream OS(Buf);
5716
5717 StringRef Values = A.front().front().getString();
5718 for (std::size_t I = 0, End = Values.size(); I != End; ++I) {
5719 MCAsmMacroArgument Arg;
5720 Arg.emplace_back(AsmToken::Identifier, Values.slice(I, I + 1));
5721
5722 // Note that the AtPseudoVariable is enabled for instantiations of .irpc.
5723 // This is undocumented, but GAS seems to support it.
5724 if (expandMacro(OS, M->Body, Parameter, Arg, true, getTok().getLoc()))
5725 return true;
5726 }
5727
5728 instantiateMacroLikeBody(M, DirectiveLoc, OS);
5729
5730 return false;
5731}
5732
5733bool AsmParser::parseDirectiveEndr(SMLoc DirectiveLoc) {
5734 if (ActiveMacros.empty())
5735 return TokError("unmatched '.endr' directive");
5736
5737 // The only .repl that should get here are the ones created by
5738 // instantiateMacroLikeBody.
5739 assert(getLexer().is(AsmToken::EndOfStatement))(static_cast <bool> (getLexer().is(AsmToken::EndOfStatement
)) ? void (0) : __assert_fail ("getLexer().is(AsmToken::EndOfStatement)"
, "/build/llvm-toolchain-snapshot-13~++20210613111130+5be314f79ba7/llvm/lib/MC/MCParser/AsmParser.cpp"
, 5739, __extension__ __PRETTY_FUNCTION__))
;
5740
5741 handleMacroExit();
5742 return false;
5743}
5744
5745bool AsmParser::parseDirectiveMSEmit(SMLoc IDLoc, ParseStatementInfo &Info,
5746 size_t Len) {
5747 const MCExpr *Value;
5748 SMLoc ExprLoc = getLexer().getLoc();
5749 if (parseExpression(Value))
5750 return true;
5751 const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Value);
5752 if (!MCE)
5753 return Error(ExprLoc, "unexpected expression in _emit");
5754 uint64_t IntValue = MCE->getValue();
5755 if (!isUInt<8>(IntValue) && !isInt<8>(IntValue))
5756 return Error(ExprLoc, "literal value out of range for directive");
5757
5758 Info.AsmRewrites->emplace_back(AOK_Emit, IDLoc, Len);
5759 return false;
5760}
5761
5762bool AsmParser::parseDirectiveMSAlign(SMLoc IDLoc, ParseStatementInfo &Info) {
5763 const MCExpr *Value;
5764 SMLoc ExprLoc = getLexer().getLoc();
5765 if (parseExpression(Value))
5766 return true;
5767 const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Value);
5768 if (!MCE)
5769 return Error(ExprLoc, "unexpected expression in align");
5770 uint64_t IntValue = MCE->getValue();
5771 if (!isPowerOf2_64(IntValue))
5772 return Error(ExprLoc, "literal value not a power of two greater then zero");
5773
5774 Info.AsmRewrites->emplace_back(AOK_Align, IDLoc, 5, Log2_64(IntValue));
5775 return false;
5776}
5777
5778bool AsmParser::parseDirectivePrint(SMLoc DirectiveLoc) {
5779 const AsmToken StrTok = getTok();
5780 Lex();
5781 if (StrTok.isNot(AsmToken::String) || StrTok.getString().front() != '"')
5782 return Error(DirectiveLoc, "expected double quoted string after .print");
5783 if (parseEOL())
5784 return true;
5785 llvm::outs() << StrTok.getStringContents() << '\n';
5786 return false;
5787}
5788
5789bool AsmParser::parseDirectiveAddrsig() {
5790 if (parseEOL())
5791 return true;
5792 getStreamer().emitAddrsig();
5793 return false;
5794}
5795
5796bool AsmParser::parseDirectiveAddrsigSym() {
5797 StringRef Name;
5798 if (check(parseIdentifier(Name), "expected identifier") || parseEOL())
5799 return true;
5800 MCSymbol *Sym = getContext().getOrCreateSymbol(Name);
5801 getStreamer().emitAddrsigSym(Sym);
5802 return false;
5803}
5804
5805bool AsmParser::parseDirectivePseudoProbe() {
5806 int64_t Guid;
5807 int64_t Index;
30
'Index' declared without an initial value
5808 int64_t Type;
5809 int64_t Attr;
5810
5811 if (getLexer().is(AsmToken::Integer)) {
31
Calling 'MCAsmLexer::is'
37
Returning from 'MCAsmLexer::is'
38
Taking true branch
5812 if (parseIntToken(Guid, "unexpected token in '.pseudoprobe' directive"))
39
Assuming the condition is false
40
Taking false branch
5813 return true;
5814 }
5815
5816 if (getLexer().is(AsmToken::Integer)) {
41
Calling 'MCAsmLexer::is'
47
Returning from 'MCAsmLexer::is'
48
Taking false branch
5817 if (parseIntToken(Index, "unexpected token in '.pseudoprobe' directive"))
5818 return true;
5819 }
5820
5821 if (getLexer().is(AsmToken::Integer)) {
49
Calling 'MCAsmLexer::is'
55
Returning from 'MCAsmLexer::is'
56
Taking false branch
5822 if (parseIntToken(Type, "unexpected token in '.pseudoprobe' directive"))
5823 return true;
5824 }
5825
5826 if (getLexer().is(AsmToken::Integer)) {
57
Calling 'MCAsmLexer::is'
63
Returning from 'MCAsmLexer::is'
64
Taking false branch
5827 if (parseIntToken(Attr, "unexpected token in '.pseudoprobe' directive"))
5828 return true;
5829 }
5830
5831 // Parse inline stack like @ GUID:11:12 @ GUID:1:11 @ GUID:3:21
5832 MCPseudoProbeInlineStack InlineStack;
5833
5834 while (getLexer().is(AsmToken::At)) {
65
Calling 'MCAsmLexer::is'
71
Returning from 'MCAsmLexer::is'
72
Loop condition is false. Execution continues on line 5860
5835 // eat @
5836 Lex();
5837
5838 int64_t CallerGuid = 0;
5839 if (getLexer().is(AsmToken::Integer)) {
5840 if (parseIntToken(CallerGuid,
5841 "unexpected token in '.pseudoprobe' directive"))
5842 return true;
5843 }
5844
5845 // eat colon
5846 if (getLexer().is(AsmToken::Colon))
5847 Lex();
5848
5849 int64_t CallerProbeId = 0;
5850 if (getLexer().is(AsmToken::Integer)) {
5851 if (parseIntToken(CallerProbeId,
5852 "unexpected token in '.pseudoprobe' directive"))
5853 return true;
5854 }
5855
5856 InlineSite Site(CallerGuid, CallerProbeId);
5857 InlineStack.push_back(Site);
5858 }
5859
5860 if (parseEOL())
73
Assuming the condition is false
74
Taking false branch
5861 return true;
5862
5863 getStreamer().emitPseudoProbe(Guid, Index, Type, Attr, InlineStack);
75
2nd function call argument is an uninitialized value
5864 return false;
5865}
5866
5867/// parseDirectiveLTODiscard
5868/// ::= ".lto_discard" [ identifier ( , identifier )* ]
5869/// The LTO library emits this directive to discard non-prevailing symbols.
5870/// We ignore symbol assignments and attribute changes for the specified
5871/// symbols.
5872bool AsmParser::parseDirectiveLTODiscard() {
5873 auto ParseOp = [&]() -> bool {
5874 StringRef Name;
5875 SMLoc Loc = getTok().getLoc();
5876 if (parseIdentifier(Name))
5877 return Error(Loc, "expected identifier");
5878 LTODiscardSymbols.insert(Name);
5879 return false;
5880 };
5881
5882 LTODiscardSymbols.clear();
5883 return parseMany(ParseOp);
5884}
5885
5886// We are comparing pointers, but the pointers are relative to a single string.
5887// Thus, this should always be deterministic.
5888static int rewritesSort(const AsmRewrite *AsmRewriteA,
5889 const AsmRewrite *AsmRewriteB) {
5890 if (AsmRewriteA->Loc.getPointer() < AsmRewriteB->Loc.getPointer())
5891 return -1;
5892 if (AsmRewriteB->Loc.getPointer() < AsmRewriteA->Loc.getPointer())
5893 return 1;
5894
5895 // It's possible to have a SizeDirective, Imm/ImmPrefix and an Input/Output
5896 // rewrite to the same location. Make sure the SizeDirective rewrite is
5897 // performed first, then the Imm/ImmPrefix and finally the Input/Output. This
5898 // ensures the sort algorithm is stable.
5899 if (AsmRewritePrecedence[AsmRewriteA->Kind] >
5900 AsmRewritePrecedence[AsmRewriteB->Kind])
5901 return -1;
5902
5903 if (AsmRewritePrecedence[AsmRewriteA->Kind] <
5904 AsmRewritePrecedence[AsmRewriteB->Kind])
5905 return 1;
5906 llvm_unreachable("Unstable rewrite sort.")::llvm::llvm_unreachable_internal("Unstable rewrite sort.", "/build/llvm-toolchain-snapshot-13~++20210613111130+5be314f79ba7/llvm/lib/MC/MCParser/AsmParser.cpp"
, 5906)
;
5907}
5908
5909bool AsmParser::parseMSInlineAsm(
5910 void *AsmLoc, std::string &AsmString, unsigned &NumOutputs,
5911 unsigned &NumInputs, SmallVectorImpl<std::pair<void *, bool>> &OpDecls,
5912 SmallVectorImpl<std::string> &Constraints,
5913 SmallVectorImpl<std::string> &Clobbers, const MCInstrInfo *MII,
5914 const MCInstPrinter *IP, MCAsmParserSemaCallback &SI) {
5915 SmallVector<void *, 4> InputDecls;
5916 SmallVector<void *, 4> OutputDecls;
5917 SmallVector<bool, 4> InputDeclsAddressOf;
5918 SmallVector<bool, 4> OutputDeclsAddressOf;
5919 SmallVector<std::string, 4> InputConstraints;
5920 SmallVector<std::string, 4> OutputConstraints;
5921 SmallVector<unsigned, 4> ClobberRegs;
5922
5923 SmallVector<AsmRewrite, 4> AsmStrRewrites;
5924
5925 // Prime the lexer.
5926 Lex();
5927
5928 // While we have input, parse each statement.
5929 unsigned InputIdx = 0;
5930 unsigned OutputIdx = 0;
5931 while (getLexer().isNot(AsmToken::Eof)) {
5932 // Parse curly braces marking block start/end
5933 if (parseCurlyBlockScope(AsmStrRewrites))
5934 continue;
5935
5936 ParseStatementInfo Info(&AsmStrRewrites);
5937 bool StatementErr = parseStatement(Info, &SI);
5938
5939 if (StatementErr || Info.ParseError) {
5940 // Emit pending errors if any exist.
5941 printPendingErrors();
5942 return true;
5943 }
5944
5945 // No pending error should exist here.
5946 assert(!hasPendingError() && "unexpected error from parseStatement")(static_cast <bool> (!hasPendingError() && "unexpected error from parseStatement"
) ? void (0) : __assert_fail ("!hasPendingError() && \"unexpected error from parseStatement\""
, "/build/llvm-toolchain-snapshot-13~++20210613111130+5be314f79ba7/llvm/lib/MC/MCParser/AsmParser.cpp"
, 5946, __extension__ __PRETTY_FUNCTION__))
;
5947
5948 if (Info.Opcode == ~0U)
5949 continue;
5950
5951 const MCInstrDesc &Desc = MII->get(Info.Opcode);
5952
5953 // Build the list of clobbers, outputs and inputs.
5954 for (unsigned i = 1, e = Info.ParsedOperands.size(); i != e; ++i) {
5955 MCParsedAsmOperand &Operand = *Info.ParsedOperands[i];
5956
5957 // Register operand.
5958 if (Operand.isReg() && !Operand.needAddressOf() &&
5959 !getTargetParser().OmitRegisterFromClobberLists(Operand.getReg())) {
5960 unsigned NumDefs = Desc.getNumDefs();
5961 // Clobber.
5962 if (NumDefs && Operand.getMCOperandNum() < NumDefs)
5963 ClobberRegs.push_back(Operand.getReg());
5964 continue;
5965 }
5966
5967 // Expr/Input or Output.
5968 StringRef SymName = Operand.getSymName();
5969 if (SymName.empty())
5970 continue;
5971
5972 void *OpDecl = Operand.getOpDecl();
5973 if (!OpDecl)
5974 continue;
5975
5976 StringRef Constraint = Operand.getConstraint();
5977 if (Operand.isImm()) {
5978 // Offset as immediate
5979 if (Operand.isOffsetOfLocal())
5980 Constraint = "r";
5981 else
5982 Constraint = "i";
5983 }
5984
5985 bool isOutput = (i == 1) && Desc.mayStore();
5986 SMLoc Start = SMLoc::getFromPointer(SymName.data());
5987 if (isOutput) {
5988 ++InputIdx;
5989 OutputDecls.push_back(OpDecl);
5990 OutputDeclsAddressOf.push_back(Operand.needAddressOf());
5991 OutputConstraints.push_back(("=" + Constraint).str());
5992 AsmStrRewrites.emplace_back(AOK_Output, Start, SymName.size());
5993 } else {
5994 InputDecls.push_back(OpDecl);
5995 InputDeclsAddressOf.push_back(Operand.needAddressOf());
5996 InputConstraints.push_back(Constraint.str());
5997 if (Desc.OpInfo[i - 1].isBranchTarget())
5998 AsmStrRewrites.emplace_back(AOK_CallInput, Start, SymName.size());
5999 else
6000 AsmStrRewrites.emplace_back(AOK_Input, Start, SymName.size());
6001 }
6002 }
6003
6004 // Consider implicit defs to be clobbers. Think of cpuid and push.
6005 ArrayRef<MCPhysReg> ImpDefs(Desc.getImplicitDefs(),
6006 Desc.getNumImplicitDefs());
6007 llvm::append_range(ClobberRegs, ImpDefs);
6008 }
6009
6010 // Set the number of Outputs and Inputs.
6011 NumOutputs = OutputDecls.size();
6012 NumInputs = InputDecls.size();
6013
6014 // Set the unique clobbers.
6015 array_pod_sort(ClobberRegs.begin(), ClobberRegs.end());
6016 ClobberRegs.erase(std::unique(ClobberRegs.begin(), ClobberRegs.end()),
6017 ClobberRegs.end());
6018 Clobbers.assign(ClobberRegs.size(), std::string());
6019 for (unsigned I = 0, E = ClobberRegs.size(); I != E; ++I) {
6020 raw_string_ostream OS(Clobbers[I]);
6021 IP->printRegName(OS, ClobberRegs[I]);
6022 }
6023
6024 // Merge the various outputs and inputs. Output are expected first.
6025 if (NumOutputs || NumInputs) {
6026 unsigned NumExprs = NumOutputs + NumInputs;
6027 OpDecls.resize(NumExprs);
6028 Constraints.resize(NumExprs);
6029 for (unsigned i = 0; i < NumOutputs; ++i) {
6030 OpDecls[i] = std::make_pair(OutputDecls[i], OutputDeclsAddressOf[i]);
6031 Constraints[i] = OutputConstraints[i];
6032 }
6033 for (unsigned i = 0, j = NumOutputs; i < NumInputs; ++i, ++j) {
6034 OpDecls[j] = std::make_pair(InputDecls[i], InputDeclsAddressOf[i]);
6035 Constraints[j] = InputConstraints[i];
6036 }
6037 }
6038
6039 // Build the IR assembly string.
6040 std::string AsmStringIR;
6041 raw_string_ostream OS(AsmStringIR);
6042 StringRef ASMString =
6043 SrcMgr.getMemoryBuffer(SrcMgr.getMainFileID())->getBuffer();
6044 const char *AsmStart = ASMString.begin();
6045 const char *AsmEnd = ASMString.end();
6046 array_pod_sort(AsmStrRewrites.begin(), AsmStrRewrites.end(), rewritesSort);
6047 for (auto it = AsmStrRewrites.begin(); it != AsmStrRewrites.end(); ++it) {
6048 const AsmRewrite &AR = *it;
6049 // Check if this has already been covered by another rewrite...
6050 if (AR.Done)
6051 continue;
6052 AsmRewriteKind Kind = AR.Kind;
6053
6054 const char *Loc = AR.Loc.getPointer();
6055 assert(Loc >= AsmStart && "Expected Loc to be at or after Start!")(static_cast <bool> (Loc >= AsmStart && "Expected Loc to be at or after Start!"
) ? void (0) : __assert_fail ("Loc >= AsmStart && \"Expected Loc to be at or after Start!\""
, "/build/llvm-toolchain-snapshot-13~++20210613111130+5be314f79ba7/llvm/lib/MC/MCParser/AsmParser.cpp"
, 6055, __extension__ __PRETTY_FUNCTION__))
;
6056
6057 // Emit everything up to the immediate/expression.
6058 if (unsigned Len = Loc - AsmStart)
6059 OS << StringRef(AsmStart, Len);
6060
6061 // Skip the original expression.
6062 if (Kind == AOK_Skip) {
6063 AsmStart = Loc + AR.Len;
6064 continue;
6065 }
6066
6067 unsigned AdditionalSkip = 0;
6068 // Rewrite expressions in $N notation.
6069 switch (Kind) {
6070 default:
6071 break;
6072 case AOK_IntelExpr:
6073 assert(AR.IntelExp.isValid() && "cannot write invalid intel expression")(static_cast <bool> (AR.IntelExp.isValid() && "cannot write invalid intel expression"
) ? void (0) : __assert_fail ("AR.IntelExp.isValid() && \"cannot write invalid intel expression\""
, "/build/llvm-toolchain-snapshot-13~++20210613111130+5be314f79ba7/llvm/lib/MC/MCParser/AsmParser.cpp"
, 6073, __extension__ __PRETTY_FUNCTION__))
;
6074 if (AR.IntelExp.NeedBracs)
6075 OS << "[";
6076 if (AR.IntelExp.hasBaseReg())
6077 OS << AR.IntelExp.BaseReg;
6078 if (AR.IntelExp.hasIndexReg())
6079 OS << (AR.IntelExp.hasBaseReg() ? " + " : "")
6080 << AR.IntelExp.IndexReg;
6081 if (AR.IntelExp.Scale > 1)
6082 OS << " * $$" << AR.IntelExp.Scale;
6083 if (AR.IntelExp.hasOffset()) {
6084 if (AR.IntelExp.hasRegs())
6085 OS << " + ";
6086 // Fuse this rewrite with a rewrite of the offset name, if present.
6087 StringRef OffsetName = AR.IntelExp.OffsetName;
6088 SMLoc OffsetLoc = SMLoc::getFromPointer(AR.IntelExp.OffsetName.data());
6089 size_t OffsetLen = OffsetName.size();
6090 auto rewrite_it = std::find_if(
6091 it, AsmStrRewrites.end(), [&](const AsmRewrite &FusingAR) {
6092 return FusingAR.Loc == OffsetLoc && FusingAR.Len == OffsetLen &&
6093 (FusingAR.Kind == AOK_Input ||
6094 FusingAR.Kind == AOK_CallInput);
6095 });
6096 if (rewrite_it == AsmStrRewrites.end()) {
6097 OS << "offset " << OffsetName;
6098 } else if (rewrite_it->Kind == AOK_CallInput) {
6099 OS << "${" << InputIdx++ << ":P}";
6100 rewrite_it->Done = true;
6101 } else {
6102 OS << '$' << InputIdx++;
6103 rewrite_it->Done = true;
6104 }
6105 }
6106 if (AR.IntelExp.Imm || AR.IntelExp.emitImm())
6107 OS << (AR.IntelExp.emitImm() ? "$$" : " + $$") << AR.IntelExp.Imm;
6108 if (AR.IntelExp.NeedBracs)
6109 OS << "]";
6110 break;
6111 case AOK_Label:
6112 OS << Ctx.getAsmInfo()->getPrivateLabelPrefix() << AR.Label;
6113 break;
6114 case AOK_Input:
6115 OS << '$' << InputIdx++;
6116 break;
6117 case AOK_CallInput:
6118 OS << "${" << InputIdx++ << ":P}";
6119 break;
6120 case AOK_Output:
6121 OS << '$' << OutputIdx++;
6122 break;
6123 case AOK_SizeDirective:
6124 switch (AR.Val) {
6125 default: break;
6126 case 8: OS << "byte ptr "; break;
6127 case 16: OS << "word ptr "; break;
6128 case 32: OS << "dword ptr "; break;
6129 case 64: OS << "qword ptr "; break;