Bug Summary

File:llvm/lib/MC/MCParser/AsmParser.cpp
Warning:line 5881, column 3
1st function call argument is an uninitialized value

Annotated Source Code

Press '?' to see keyboard shortcuts

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~++20210621111111+acefe0eaaf82/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~++20210621111111+acefe0eaaf82/build-llvm/lib/MC/MCParser -I /build/llvm-toolchain-snapshot-13~++20210621111111+acefe0eaaf82/llvm/lib/MC/MCParser -I /build/llvm-toolchain-snapshot-13~++20210621111111+acefe0eaaf82/build-llvm/include -I /build/llvm-toolchain-snapshot-13~++20210621111111+acefe0eaaf82/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~++20210621111111+acefe0eaaf82/build-llvm/lib/MC/MCParser -fdebug-prefix-map=/build/llvm-toolchain-snapshot-13~++20210621111111+acefe0eaaf82=. -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-2021-06-21-164211-33944-1 -x c++ /build/llvm-toolchain-snapshot-13~++20210621111111+acefe0eaaf82/llvm/lib/MC/MCParser/AsmParser.cpp

/build/llvm-toolchain-snapshot-13~++20210621111111+acefe0eaaf82/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_LLVM_DEF_ASPACE_CFA,
503 DK_CFI_OFFSET,
504 DK_CFI_REL_OFFSET,
505 DK_CFI_PERSONALITY,
506 DK_CFI_LSDA,
507 DK_CFI_REMEMBER_STATE,
508 DK_CFI_RESTORE_STATE,
509 DK_CFI_SAME_VALUE,
510 DK_CFI_RESTORE,
511 DK_CFI_ESCAPE,
512 DK_CFI_RETURN_COLUMN,
513 DK_CFI_SIGNAL_FRAME,
514 DK_CFI_UNDEFINED,
515 DK_CFI_REGISTER,
516 DK_CFI_WINDOW_SAVE,
517 DK_CFI_B_KEY_FRAME,
518 DK_MACROS_ON,
519 DK_MACROS_OFF,
520 DK_ALTMACRO,
521 DK_NOALTMACRO,
522 DK_MACRO,
523 DK_EXITM,
524 DK_ENDM,
525 DK_ENDMACRO,
526 DK_PURGEM,
527 DK_SLEB128,
528 DK_ULEB128,
529 DK_ERR,
530 DK_ERROR,
531 DK_WARNING,
532 DK_PRINT,
533 DK_ADDRSIG,
534 DK_ADDRSIG_SYM,
535 DK_PSEUDO_PROBE,
536 DK_LTO_DISCARD,
537 DK_END
538 };
539
540 /// Maps directive name --> DirectiveKind enum, for
541 /// directives parsed by this class.
542 StringMap<DirectiveKind> DirectiveKindMap;
543
544 // Codeview def_range type parsing.
545 enum CVDefRangeType {
546 CVDR_DEFRANGE = 0, // Placeholder
547 CVDR_DEFRANGE_REGISTER,
548 CVDR_DEFRANGE_FRAMEPOINTER_REL,
549 CVDR_DEFRANGE_SUBFIELD_REGISTER,
550 CVDR_DEFRANGE_REGISTER_REL
551 };
552
553 /// Maps Codeview def_range types --> CVDefRangeType enum, for
554 /// Codeview def_range types parsed by this class.
555 StringMap<CVDefRangeType> CVDefRangeTypeMap;
556
557 // ".ascii", ".asciz", ".string"
558 bool parseDirectiveAscii(StringRef IDVal, bool ZeroTerminated);
559 bool parseDirectiveReloc(SMLoc DirectiveLoc); // ".reloc"
560 bool parseDirectiveValue(StringRef IDVal,
561 unsigned Size); // ".byte", ".long", ...
562 bool parseDirectiveOctaValue(StringRef IDVal); // ".octa", ...
563 bool parseDirectiveRealValue(StringRef IDVal,
564 const fltSemantics &); // ".single", ...
565 bool parseDirectiveFill(); // ".fill"
566 bool parseDirectiveZero(); // ".zero"
567 // ".set", ".equ", ".equiv"
568 bool parseDirectiveSet(StringRef IDVal, bool allow_redef);
569 bool parseDirectiveOrg(); // ".org"
570 // ".align{,32}", ".p2align{,w,l}"
571 bool parseDirectiveAlign(bool IsPow2, unsigned ValueSize);
572
573 // ".file", ".line", ".loc", ".stabs"
574 bool parseDirectiveFile(SMLoc DirectiveLoc);
575 bool parseDirectiveLine();
576 bool parseDirectiveLoc();
577 bool parseDirectiveStabs();
578
579 // ".cv_file", ".cv_func_id", ".cv_inline_site_id", ".cv_loc", ".cv_linetable",
580 // ".cv_inline_linetable", ".cv_def_range", ".cv_string"
581 bool parseDirectiveCVFile();
582 bool parseDirectiveCVFuncId();
583 bool parseDirectiveCVInlineSiteId();
584 bool parseDirectiveCVLoc();
585 bool parseDirectiveCVLinetable();
586 bool parseDirectiveCVInlineLinetable();
587 bool parseDirectiveCVDefRange();
588 bool parseDirectiveCVString();
589 bool parseDirectiveCVStringTable();
590 bool parseDirectiveCVFileChecksums();
591 bool parseDirectiveCVFileChecksumOffset();
592 bool parseDirectiveCVFPOData();
593
594 // .cfi directives
595 bool parseDirectiveCFIRegister(SMLoc DirectiveLoc);
596 bool parseDirectiveCFIWindowSave();
597 bool parseDirectiveCFISections();
598 bool parseDirectiveCFIStartProc();
599 bool parseDirectiveCFIEndProc();
600 bool parseDirectiveCFIDefCfaOffset();
601 bool parseDirectiveCFIDefCfa(SMLoc DirectiveLoc);
602 bool parseDirectiveCFIAdjustCfaOffset();
603 bool parseDirectiveCFIDefCfaRegister(SMLoc DirectiveLoc);
604 bool parseDirectiveCFILLVMDefAspaceCfa(SMLoc DirectiveLoc);
605 bool parseDirectiveCFIOffset(SMLoc DirectiveLoc);
606 bool parseDirectiveCFIRelOffset(SMLoc DirectiveLoc);
607 bool parseDirectiveCFIPersonalityOrLsda(bool IsPersonality);
608 bool parseDirectiveCFIRememberState();
609 bool parseDirectiveCFIRestoreState();
610 bool parseDirectiveCFISameValue(SMLoc DirectiveLoc);
611 bool parseDirectiveCFIRestore(SMLoc DirectiveLoc);
612 bool parseDirectiveCFIEscape();
613 bool parseDirectiveCFIReturnColumn(SMLoc DirectiveLoc);
614 bool parseDirectiveCFISignalFrame();
615 bool parseDirectiveCFIUndefined(SMLoc DirectiveLoc);
616
617 // macro directives
618 bool parseDirectivePurgeMacro(SMLoc DirectiveLoc);
619 bool parseDirectiveExitMacro(StringRef Directive);
620 bool parseDirectiveEndMacro(StringRef Directive);
621 bool parseDirectiveMacro(SMLoc DirectiveLoc);
622 bool parseDirectiveMacrosOnOff(StringRef Directive);
623 // alternate macro mode directives
624 bool parseDirectiveAltmacro(StringRef Directive);
625 // ".bundle_align_mode"
626 bool parseDirectiveBundleAlignMode();
627 // ".bundle_lock"
628 bool parseDirectiveBundleLock();
629 // ".bundle_unlock"
630 bool parseDirectiveBundleUnlock();
631
632 // ".space", ".skip"
633 bool parseDirectiveSpace(StringRef IDVal);
634
635 // ".dcb"
636 bool parseDirectiveDCB(StringRef IDVal, unsigned Size);
637 bool parseDirectiveRealDCB(StringRef IDVal, const fltSemantics &);
638 // ".ds"
639 bool parseDirectiveDS(StringRef IDVal, unsigned Size);
640
641 // .sleb128 (Signed=true) and .uleb128 (Signed=false)
642 bool parseDirectiveLEB128(bool Signed);
643
644 /// Parse a directive like ".globl" which
645 /// accepts a single symbol (which should be a label or an external).
646 bool parseDirectiveSymbolAttribute(MCSymbolAttr Attr);
647
648 bool parseDirectiveComm(bool IsLocal); // ".comm" and ".lcomm"
649
650 bool parseDirectiveAbort(); // ".abort"
651 bool parseDirectiveInclude(); // ".include"
652 bool parseDirectiveIncbin(); // ".incbin"
653
654 // ".if", ".ifeq", ".ifge", ".ifgt" , ".ifle", ".iflt" or ".ifne"
655 bool parseDirectiveIf(SMLoc DirectiveLoc, DirectiveKind DirKind);
656 // ".ifb" or ".ifnb", depending on ExpectBlank.
657 bool parseDirectiveIfb(SMLoc DirectiveLoc, bool ExpectBlank);
658 // ".ifc" or ".ifnc", depending on ExpectEqual.
659 bool parseDirectiveIfc(SMLoc DirectiveLoc, bool ExpectEqual);
660 // ".ifeqs" or ".ifnes", depending on ExpectEqual.
661 bool parseDirectiveIfeqs(SMLoc DirectiveLoc, bool ExpectEqual);
662 // ".ifdef" or ".ifndef", depending on expect_defined
663 bool parseDirectiveIfdef(SMLoc DirectiveLoc, bool expect_defined);
664 bool parseDirectiveElseIf(SMLoc DirectiveLoc); // ".elseif"
665 bool parseDirectiveElse(SMLoc DirectiveLoc); // ".else"
666 bool parseDirectiveEndIf(SMLoc DirectiveLoc); // .endif
667 bool parseEscapedString(std::string &Data) override;
668 bool parseAngleBracketString(std::string &Data) override;
669
670 const MCExpr *applyModifierToExpr(const MCExpr *E,
671 MCSymbolRefExpr::VariantKind Variant);
672
673 // Macro-like directives
674 MCAsmMacro *parseMacroLikeBody(SMLoc DirectiveLoc);
675 void instantiateMacroLikeBody(MCAsmMacro *M, SMLoc DirectiveLoc,
676 raw_svector_ostream &OS);
677 bool parseDirectiveRept(SMLoc DirectiveLoc, StringRef Directive);
678 bool parseDirectiveIrp(SMLoc DirectiveLoc); // ".irp"
679 bool parseDirectiveIrpc(SMLoc DirectiveLoc); // ".irpc"
680 bool parseDirectiveEndr(SMLoc DirectiveLoc); // ".endr"
681
682 // "_emit" or "__emit"
683 bool parseDirectiveMSEmit(SMLoc DirectiveLoc, ParseStatementInfo &Info,
684 size_t Len);
685
686 // "align"
687 bool parseDirectiveMSAlign(SMLoc DirectiveLoc, ParseStatementInfo &Info);
688
689 // "end"
690 bool parseDirectiveEnd(SMLoc DirectiveLoc);
691
692 // ".err" or ".error"
693 bool parseDirectiveError(SMLoc DirectiveLoc, bool WithMessage);
694
695 // ".warning"
696 bool parseDirectiveWarning(SMLoc DirectiveLoc);
697
698 // .print <double-quotes-string>
699 bool parseDirectivePrint(SMLoc DirectiveLoc);
700
701 // .pseudoprobe
702 bool parseDirectivePseudoProbe();
703
704 // ".lto_discard"
705 bool parseDirectiveLTODiscard();
706
707 // Directives to support address-significance tables.
708 bool parseDirectiveAddrsig();
709 bool parseDirectiveAddrsigSym();
710
711 void initializeDirectiveKindMap();
712 void initializeCVDefRangeTypeMap();
713};
714
715class HLASMAsmParser final : public AsmParser {
716private:
717 MCAsmLexer &Lexer;
718 MCStreamer &Out;
719
720 void lexLeadingSpaces() {
721 while (Lexer.is(AsmToken::Space))
722 Lexer.Lex();
723 }
724
725 bool parseAsHLASMLabel(ParseStatementInfo &Info, MCAsmParserSemaCallback *SI);
726 bool parseAsMachineInstruction(ParseStatementInfo &Info,
727 MCAsmParserSemaCallback *SI);
728
729public:
730 HLASMAsmParser(SourceMgr &SM, MCContext &Ctx, MCStreamer &Out,
731 const MCAsmInfo &MAI, unsigned CB = 0)
732 : AsmParser(SM, Ctx, Out, MAI, CB), Lexer(getLexer()), Out(Out) {
733 Lexer.setSkipSpace(false);
734 Lexer.setAllowHashInIdentifier(true);
735 Lexer.setLexHLASMIntegers(true);
736 Lexer.setLexHLASMStrings(true);
737 }
738
739 ~HLASMAsmParser() { Lexer.setSkipSpace(true); }
740
741 bool parseStatement(ParseStatementInfo &Info,
742 MCAsmParserSemaCallback *SI) override;
743};
744
745} // end anonymous namespace
746
747namespace llvm {
748
749extern MCAsmParserExtension *createDarwinAsmParser();
750extern MCAsmParserExtension *createELFAsmParser();
751extern MCAsmParserExtension *createCOFFAsmParser();
752extern MCAsmParserExtension *createWasmAsmParser();
753
754} // end namespace llvm
755
756enum { DEFAULT_ADDRSPACE = 0 };
757
758AsmParser::AsmParser(SourceMgr &SM, MCContext &Ctx, MCStreamer &Out,
759 const MCAsmInfo &MAI, unsigned CB = 0)
760 : Lexer(MAI), Ctx(Ctx), Out(Out), MAI(MAI), SrcMgr(SM),
761 CurBuffer(CB ? CB : SM.getMainFileID()), MacrosEnabledFlag(true) {
762 HadError = false;
763 // Save the old handler.
764 SavedDiagHandler = SrcMgr.getDiagHandler();
765 SavedDiagContext = SrcMgr.getDiagContext();
766 // Set our own handler which calls the saved handler.
767 SrcMgr.setDiagHandler(DiagHandler, this);
768 Lexer.setBuffer(SrcMgr.getMemoryBuffer(CurBuffer)->getBuffer());
769 // Make MCStreamer aware of the StartTokLoc for locations in diagnostics.
770 Out.setStartTokLocPtr(&StartTokLoc);
771
772 // Initialize the platform / file format parser.
773 switch (Ctx.getObjectFileType()) {
774 case MCContext::IsCOFF:
775 PlatformParser.reset(createCOFFAsmParser());
776 break;
777 case MCContext::IsMachO:
778 PlatformParser.reset(createDarwinAsmParser());
779 IsDarwin = true;
780 break;
781 case MCContext::IsELF:
782 PlatformParser.reset(createELFAsmParser());
783 break;
784 case MCContext::IsWasm:
785 PlatformParser.reset(createWasmAsmParser());
786 break;
787 case MCContext::IsXCOFF:
788 report_fatal_error(
789 "Need to implement createXCOFFAsmParser for XCOFF format.");
790 break;
791 }
792
793 PlatformParser->Initialize(*this);
794 initializeDirectiveKindMap();
795 initializeCVDefRangeTypeMap();
796
797 NumOfMacroInstantiations = 0;
798}
799
800AsmParser::~AsmParser() {
801 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~++20210621111111+acefe0eaaf82/llvm/lib/MC/MCParser/AsmParser.cpp"
, 802, __extension__ __PRETTY_FUNCTION__))
802 "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~++20210621111111+acefe0eaaf82/llvm/lib/MC/MCParser/AsmParser.cpp"
, 802, __extension__ __PRETTY_FUNCTION__))
;
803
804 // Remove MCStreamer's reference to the parser SMLoc.
805 Out.setStartTokLocPtr(nullptr);
806 // Restore the saved diagnostics handler and context for use during
807 // finalization.
808 SrcMgr.setDiagHandler(SavedDiagHandler, SavedDiagContext);
809}
810
811void AsmParser::printMacroInstantiations() {
812 // Print the active macro instantiation stack.
813 for (std::vector<MacroInstantiation *>::const_reverse_iterator
814 it = ActiveMacros.rbegin(),
815 ie = ActiveMacros.rend();
816 it != ie; ++it)
817 printMessage((*it)->InstantiationLoc, SourceMgr::DK_Note,
818 "while in macro instantiation");
819}
820
821void AsmParser::Note(SMLoc L, const Twine &Msg, SMRange Range) {
822 printPendingErrors();
823 printMessage(L, SourceMgr::DK_Note, Msg, Range);
824 printMacroInstantiations();
825}
826
827bool AsmParser::Warning(SMLoc L, const Twine &Msg, SMRange Range) {
828 if(getTargetParser().getTargetOptions().MCNoWarn)
829 return false;
830 if (getTargetParser().getTargetOptions().MCFatalWarnings)
831 return Error(L, Msg, Range);
832 printMessage(L, SourceMgr::DK_Warning, Msg, Range);
833 printMacroInstantiations();
834 return false;
835}
836
837bool AsmParser::printError(SMLoc L, const Twine &Msg, SMRange Range) {
838 HadError = true;
839 printMessage(L, SourceMgr::DK_Error, Msg, Range);
840 printMacroInstantiations();
841 return true;
842}
843
844bool AsmParser::enterIncludeFile(const std::string &Filename) {
845 std::string IncludedFile;
846 unsigned NewBuf =
847 SrcMgr.AddIncludeFile(Filename, Lexer.getLoc(), IncludedFile);
848 if (!NewBuf)
849 return true;
850
851 CurBuffer = NewBuf;
852 Lexer.setBuffer(SrcMgr.getMemoryBuffer(CurBuffer)->getBuffer());
853 return false;
854}
855
856/// Process the specified .incbin file by searching for it in the include paths
857/// then just emitting the byte contents of the file to the streamer. This
858/// returns true on failure.
859bool AsmParser::processIncbinFile(const std::string &Filename, int64_t Skip,
860 const MCExpr *Count, SMLoc Loc) {
861 std::string IncludedFile;
862 unsigned NewBuf =
863 SrcMgr.AddIncludeFile(Filename, Lexer.getLoc(), IncludedFile);
864 if (!NewBuf)
865 return true;
866
867 // Pick up the bytes from the file and emit them.
868 StringRef Bytes = SrcMgr.getMemoryBuffer(NewBuf)->getBuffer();
869 Bytes = Bytes.drop_front(Skip);
870 if (Count) {
871 int64_t Res;
872 if (!Count->evaluateAsAbsolute(Res, getStreamer().getAssemblerPtr()))
873 return Error(Loc, "expected absolute expression");
874 if (Res < 0)
875 return Warning(Loc, "negative count has no effect");
876 Bytes = Bytes.take_front(Res);
877 }
878 getStreamer().emitBytes(Bytes);
879 return false;
880}
881
882void AsmParser::jumpToLoc(SMLoc Loc, unsigned InBuffer) {
883 CurBuffer = InBuffer ? InBuffer : SrcMgr.FindBufferContainingLoc(Loc);
884 Lexer.setBuffer(SrcMgr.getMemoryBuffer(CurBuffer)->getBuffer(),
885 Loc.getPointer());
886}
887
888const AsmToken &AsmParser::Lex() {
889 if (Lexer.getTok().is(AsmToken::Error))
890 Error(Lexer.getErrLoc(), Lexer.getErr());
891
892 // if it's a end of statement with a comment in it
893 if (getTok().is(AsmToken::EndOfStatement)) {
894 // if this is a line comment output it.
895 if (!getTok().getString().empty() && getTok().getString().front() != '\n' &&
896 getTok().getString().front() != '\r' && MAI.preserveAsmComments())
897 Out.addExplicitComment(Twine(getTok().getString()));
898 }
899
900 const AsmToken *tok = &Lexer.Lex();
901
902 // Parse comments here to be deferred until end of next statement.
903 while (tok->is(AsmToken::Comment)) {
904 if (MAI.preserveAsmComments())
905 Out.addExplicitComment(Twine(tok->getString()));
906 tok = &Lexer.Lex();
907 }
908
909 if (tok->is(AsmToken::Eof)) {
910 // If this is the end of an included file, pop the parent file off the
911 // include stack.
912 SMLoc ParentIncludeLoc = SrcMgr.getParentIncludeLoc(CurBuffer);
913 if (ParentIncludeLoc != SMLoc()) {
914 jumpToLoc(ParentIncludeLoc);
915 return Lex();
916 }
917 }
918
919 return *tok;
920}
921
922bool AsmParser::enabledGenDwarfForAssembly() {
923 // Check whether the user specified -g.
924 if (!getContext().getGenDwarfForAssembly())
925 return false;
926 // If we haven't encountered any .file directives (which would imply that
927 // the assembler source was produced with debug info already) then emit one
928 // describing the assembler source file itself.
929 if (getContext().getGenDwarfFileNumber() == 0) {
930 // Use the first #line directive for this, if any. It's preprocessed, so
931 // there is no checksum, and of course no source directive.
932 if (!FirstCppHashFilename.empty())
933 getContext().setMCLineTableRootFile(/*CUID=*/0,
934 getContext().getCompilationDir(),
935 FirstCppHashFilename,
936 /*Cksum=*/None, /*Source=*/None);
937 const MCDwarfFile &RootFile =
938 getContext().getMCDwarfLineTable(/*CUID=*/0).getRootFile();
939 getContext().setGenDwarfFileNumber(getStreamer().emitDwarfFileDirective(
940 /*CUID=*/0, getContext().getCompilationDir(), RootFile.Name,
941 RootFile.Checksum, RootFile.Source));
942 }
943 return true;
944}
945
946bool AsmParser::Run(bool NoInitialTextSection, bool NoFinalize) {
947 LTODiscardSymbols.clear();
948
949 // Create the initial section, if requested.
950 if (!NoInitialTextSection)
951 Out.InitSections(false);
952
953 // Prime the lexer.
954 Lex();
955
956 HadError = false;
957 AsmCond StartingCondState = TheCondState;
958 SmallVector<AsmRewrite, 4> AsmStrRewrites;
959
960 // If we are generating dwarf for assembly source files save the initial text
961 // section. (Don't use enabledGenDwarfForAssembly() here, as we aren't
962 // emitting any actual debug info yet and haven't had a chance to parse any
963 // embedded .file directives.)
964 if (getContext().getGenDwarfForAssembly()) {
965 MCSection *Sec = getStreamer().getCurrentSectionOnly();
966 if (!Sec->getBeginSymbol()) {
967 MCSymbol *SectionStartSym = getContext().createTempSymbol();
968 getStreamer().emitLabel(SectionStartSym);
969 Sec->setBeginSymbol(SectionStartSym);
970 }
971 bool InsertResult = getContext().addGenDwarfSection(Sec);
972 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~++20210621111111+acefe0eaaf82/llvm/lib/MC/MCParser/AsmParser.cpp"
, 972, __extension__ __PRETTY_FUNCTION__))
;
973 (void)InsertResult;
974 }
975
976 getTargetParser().onBeginOfFile();
977
978 // While we have input, parse each statement.
979 while (Lexer.isNot(AsmToken::Eof)) {
980 ParseStatementInfo Info(&AsmStrRewrites);
981 bool Parsed = parseStatement(Info, nullptr);
982
983 // If we have a Lexer Error we are on an Error Token. Load in Lexer Error
984 // for printing ErrMsg via Lex() only if no (presumably better) parser error
985 // exists.
986 if (Parsed && !hasPendingError() && Lexer.getTok().is(AsmToken::Error)) {
987 Lex();
988 }
989
990 // parseStatement returned true so may need to emit an error.
991 printPendingErrors();
992
993 // Skipping to the next line if needed.
994 if (Parsed && !getLexer().isAtStartOfStatement())
995 eatToEndOfStatement();
996 }
997
998 getTargetParser().onEndOfFile();
999 printPendingErrors();
1000
1001 // All errors should have been emitted.
1002 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~++20210621111111+acefe0eaaf82/llvm/lib/MC/MCParser/AsmParser.cpp"
, 1002, __extension__ __PRETTY_FUNCTION__))
;
1003
1004 getTargetParser().flushPendingInstructions(getStreamer());
1005
1006 if (TheCondState.TheCond != StartingCondState.TheCond ||
1007 TheCondState.Ignore != StartingCondState.Ignore)
1008 printError(getTok().getLoc(), "unmatched .ifs or .elses");
1009 // Check to see there are no empty DwarfFile slots.
1010 const auto &LineTables = getContext().getMCDwarfLineTables();
1011 if (!LineTables.empty()) {
1012 unsigned Index = 0;
1013 for (const auto &File : LineTables.begin()->second.getMCDwarfFiles()) {
1014 if (File.Name.empty() && Index != 0)
1015 printError(getTok().getLoc(), "unassigned file number: " +
1016 Twine(Index) +
1017 " for .file directives");
1018 ++Index;
1019 }
1020 }
1021
1022 // Check to see that all assembler local symbols were actually defined.
1023 // Targets that don't do subsections via symbols may not want this, though,
1024 // so conservatively exclude them. Only do this if we're finalizing, though,
1025 // as otherwise we won't necessarilly have seen everything yet.
1026 if (!NoFinalize) {
1027 if (MAI.hasSubsectionsViaSymbols()) {
1028 for (const auto &TableEntry : getContext().getSymbols()) {
1029 MCSymbol *Sym = TableEntry.getValue();
1030 // Variable symbols may not be marked as defined, so check those
1031 // explicitly. If we know it's a variable, we have a definition for
1032 // the purposes of this check.
1033 if (Sym->isTemporary() && !Sym->isVariable() && !Sym->isDefined())
1034 // FIXME: We would really like to refer back to where the symbol was
1035 // first referenced for a source location. We need to add something
1036 // to track that. Currently, we just point to the end of the file.
1037 printError(getTok().getLoc(), "assembler local symbol '" +
1038 Sym->getName() + "' not defined");
1039 }
1040 }
1041
1042 // Temporary symbols like the ones for directional jumps don't go in the
1043 // symbol table. They also need to be diagnosed in all (final) cases.
1044 for (std::tuple<SMLoc, CppHashInfoTy, MCSymbol *> &LocSym : DirLabels) {
1045 if (std::get<2>(LocSym)->isUndefined()) {
1046 // Reset the state of any "# line file" directives we've seen to the
1047 // context as it was at the diagnostic site.
1048 CppHashInfo = std::get<1>(LocSym);
1049 printError(std::get<0>(LocSym), "directional label undefined");
1050 }
1051 }
1052 }
1053
1054 // Finalize the output stream if there are no errors and if the client wants
1055 // us to.
1056 if (!HadError && !NoFinalize)
1057 Out.Finish(Lexer.getLoc());
1058
1059 return HadError || getContext().hadError();
1060}
1061
1062bool AsmParser::checkForValidSection() {
1063 if (!ParsingMSInlineAsm && !getStreamer().getCurrentSectionOnly()) {
1064 Out.InitSections(false);
1065 return Error(getTok().getLoc(),
1066 "expected section directive before assembly directive");
1067 }
1068 return false;
1069}
1070
1071/// Throw away the rest of the line for testing purposes.
1072void AsmParser::eatToEndOfStatement() {
1073 while (Lexer.isNot(AsmToken::EndOfStatement) && Lexer.isNot(AsmToken::Eof))
1074 Lexer.Lex();
1075
1076 // Eat EOL.
1077 if (Lexer.is(AsmToken::EndOfStatement))
1078 Lexer.Lex();
1079}
1080
1081StringRef AsmParser::parseStringToEndOfStatement() {
1082 const char *Start = getTok().getLoc().getPointer();
1083
1084 while (Lexer.isNot(AsmToken::EndOfStatement) && Lexer.isNot(AsmToken::Eof))
1085 Lexer.Lex();
1086
1087 const char *End = getTok().getLoc().getPointer();
1088 return StringRef(Start, End - Start);
1089}
1090
1091StringRef AsmParser::parseStringToComma() {
1092 const char *Start = getTok().getLoc().getPointer();
1093
1094 while (Lexer.isNot(AsmToken::EndOfStatement) &&
1095 Lexer.isNot(AsmToken::Comma) && Lexer.isNot(AsmToken::Eof))
1096 Lexer.Lex();
1097
1098 const char *End = getTok().getLoc().getPointer();
1099 return StringRef(Start, End - Start);
1100}
1101
1102/// Parse a paren expression and return it.
1103/// NOTE: This assumes the leading '(' has already been consumed.
1104///
1105/// parenexpr ::= expr)
1106///
1107bool AsmParser::parseParenExpr(const MCExpr *&Res, SMLoc &EndLoc) {
1108 if (parseExpression(Res))
1109 return true;
1110 if (Lexer.isNot(AsmToken::RParen))
1111 return TokError("expected ')' in parentheses expression");
1112 EndLoc = Lexer.getTok().getEndLoc();
1113 Lex();
1114 return false;
1115}
1116
1117/// Parse a bracket expression and return it.
1118/// NOTE: This assumes the leading '[' has already been consumed.
1119///
1120/// bracketexpr ::= expr]
1121///
1122bool AsmParser::parseBracketExpr(const MCExpr *&Res, SMLoc &EndLoc) {
1123 if (parseExpression(Res))
1124 return true;
1125 EndLoc = getTok().getEndLoc();
1126 if (parseToken(AsmToken::RBrac, "expected ']' in brackets expression"))
1127 return true;
1128 return false;
1129}
1130
1131/// Parse a primary expression and return it.
1132/// primaryexpr ::= (parenexpr
1133/// primaryexpr ::= symbol
1134/// primaryexpr ::= number
1135/// primaryexpr ::= '.'
1136/// primaryexpr ::= ~,+,- primaryexpr
1137bool AsmParser::parsePrimaryExpr(const MCExpr *&Res, SMLoc &EndLoc,
1138 AsmTypeInfo *TypeInfo) {
1139 SMLoc FirstTokenLoc = getLexer().getLoc();
1140 AsmToken::TokenKind FirstTokenKind = Lexer.getKind();
1141 switch (FirstTokenKind) {
1142 default:
1143 return TokError("unknown token in expression");
1144 // If we have an error assume that we've already handled it.
1145 case AsmToken::Error:
1146 return true;
1147 case AsmToken::Exclaim:
1148 Lex(); // Eat the operator.
1149 if (parsePrimaryExpr(Res, EndLoc, TypeInfo))
1150 return true;
1151 Res = MCUnaryExpr::createLNot(Res, getContext(), FirstTokenLoc);
1152 return false;
1153 case AsmToken::Dollar:
1154 case AsmToken::Star:
1155 case AsmToken::At:
1156 case AsmToken::String:
1157 case AsmToken::Identifier: {
1158 StringRef Identifier;
1159 if (parseIdentifier(Identifier)) {
1160 // We may have failed but '$'|'*' may be a valid token in context of
1161 // the current PC.
1162 if (getTok().is(AsmToken::Dollar) || getTok().is(AsmToken::Star)) {
1163 bool ShouldGenerateTempSymbol = false;
1164 if ((getTok().is(AsmToken::Dollar) && MAI.getDollarIsPC()) ||
1165 (getTok().is(AsmToken::Star) && MAI.getStarIsPC()))
1166 ShouldGenerateTempSymbol = true;
1167
1168 if (!ShouldGenerateTempSymbol)
1169 return Error(FirstTokenLoc, "invalid token in expression");
1170
1171 // Eat the '$'|'*' token.
1172 Lex();
1173 // This is either a '$'|'*' reference, which references the current PC.
1174 // Emit a temporary label to the streamer and refer to it.
1175 MCSymbol *Sym = Ctx.createTempSymbol();
1176 Out.emitLabel(Sym);
1177 Res = MCSymbolRefExpr::create(Sym, MCSymbolRefExpr::VK_None,
1178 getContext());
1179 EndLoc = FirstTokenLoc;
1180 return false;
1181 }
1182 }
1183 // Parse symbol variant
1184 std::pair<StringRef, StringRef> Split;
1185 if (!MAI.useParensForSymbolVariant()) {
1186 if (FirstTokenKind == AsmToken::String) {
1187 if (Lexer.is(AsmToken::At)) {
1188 Lex(); // eat @
1189 SMLoc AtLoc = getLexer().getLoc();
1190 StringRef VName;
1191 if (parseIdentifier(VName))
1192 return Error(AtLoc, "expected symbol variant after '@'");
1193
1194 Split = std::make_pair(Identifier, VName);
1195 }
1196 } else {
1197 Split = Identifier.split('@');
1198 }
1199 } else if (Lexer.is(AsmToken::LParen)) {
1200 Lex(); // eat '('.
1201 StringRef VName;
1202 parseIdentifier(VName);
1203 // eat ')'.
1204 if (parseToken(AsmToken::RParen,
1205 "unexpected token in variant, expected ')'"))
1206 return true;
1207 Split = std::make_pair(Identifier, VName);
1208 }
1209
1210 EndLoc = SMLoc::getFromPointer(Identifier.end());
1211
1212 // This is a symbol reference.
1213 StringRef SymbolName = Identifier;
1214 if (SymbolName.empty())
1215 return Error(getLexer().getLoc(), "expected a symbol reference");
1216
1217 MCSymbolRefExpr::VariantKind Variant = MCSymbolRefExpr::VK_None;
1218
1219 // Lookup the symbol variant if used.
1220 if (!Split.second.empty()) {
1221 Variant = MCSymbolRefExpr::getVariantKindForName(Split.second);
1222 if (Variant != MCSymbolRefExpr::VK_Invalid) {
1223 SymbolName = Split.first;
1224 } else if (MAI.doesAllowAtInName() && !MAI.useParensForSymbolVariant()) {
1225 Variant = MCSymbolRefExpr::VK_None;
1226 } else {
1227 return Error(SMLoc::getFromPointer(Split.second.begin()),
1228 "invalid variant '" + Split.second + "'");
1229 }
1230 }
1231
1232 MCSymbol *Sym = getContext().getInlineAsmLabel(SymbolName);
1233 if (!Sym)
1234 Sym = getContext().getOrCreateSymbol(SymbolName);
1235
1236 // If this is an absolute variable reference, substitute it now to preserve
1237 // semantics in the face of reassignment.
1238 if (Sym->isVariable()) {
1239 auto V = Sym->getVariableValue(/*SetUsed*/ false);
1240 bool DoInline = isa<MCConstantExpr>(V) && !Variant;
1241 if (auto TV = dyn_cast<MCTargetExpr>(V))
1242 DoInline = TV->inlineAssignedExpr();
1243 if (DoInline) {
1244 if (Variant)
1245 return Error(EndLoc, "unexpected modifier on variable reference");
1246 Res = Sym->getVariableValue(/*SetUsed*/ false);
1247 return false;
1248 }
1249 }
1250
1251 // Otherwise create a symbol ref.
1252 Res = MCSymbolRefExpr::create(Sym, Variant, getContext(), FirstTokenLoc);
1253 return false;
1254 }
1255 case AsmToken::BigNum:
1256 return TokError("literal value out of range for directive");
1257 case AsmToken::Integer: {
1258 SMLoc Loc = getTok().getLoc();
1259 int64_t IntVal = getTok().getIntVal();
1260 Res = MCConstantExpr::create(IntVal, getContext());
1261 EndLoc = Lexer.getTok().getEndLoc();
1262 Lex(); // Eat token.
1263 // Look for 'b' or 'f' following an Integer as a directional label
1264 if (Lexer.getKind() == AsmToken::Identifier) {
1265 StringRef IDVal = getTok().getString();
1266 // Lookup the symbol variant if used.
1267 std::pair<StringRef, StringRef> Split = IDVal.split('@');
1268 MCSymbolRefExpr::VariantKind Variant = MCSymbolRefExpr::VK_None;
1269 if (Split.first.size() != IDVal.size()) {
1270 Variant = MCSymbolRefExpr::getVariantKindForName(Split.second);
1271 if (Variant == MCSymbolRefExpr::VK_Invalid)
1272 return TokError("invalid variant '" + Split.second + "'");
1273 IDVal = Split.first;
1274 }
1275 if (IDVal == "f" || IDVal == "b") {
1276 MCSymbol *Sym =
1277 Ctx.getDirectionalLocalSymbol(IntVal, IDVal == "b");
1278 Res = MCSymbolRefExpr::create(Sym, Variant, getContext());
1279 if (IDVal == "b" && Sym->isUndefined())
1280 return Error(Loc, "directional label undefined");
1281 DirLabels.push_back(std::make_tuple(Loc, CppHashInfo, Sym));
1282 EndLoc = Lexer.getTok().getEndLoc();
1283 Lex(); // Eat identifier.
1284 }
1285 }
1286 return false;
1287 }
1288 case AsmToken::Real: {
1289 APFloat RealVal(APFloat::IEEEdouble(), getTok().getString());
1290 uint64_t IntVal = RealVal.bitcastToAPInt().getZExtValue();
1291 Res = MCConstantExpr::create(IntVal, getContext());
1292 EndLoc = Lexer.getTok().getEndLoc();
1293 Lex(); // Eat token.
1294 return false;
1295 }
1296 case AsmToken::Dot: {
1297 if (!MAI.getDotIsPC())
1298 return TokError("cannot use . as current PC");
1299
1300 // This is a '.' reference, which references the current PC. Emit a
1301 // temporary label to the streamer and refer to it.
1302 MCSymbol *Sym = Ctx.createTempSymbol();
1303 Out.emitLabel(Sym);
1304 Res = MCSymbolRefExpr::create(Sym, MCSymbolRefExpr::VK_None, getContext());
1305 EndLoc = Lexer.getTok().getEndLoc();
1306 Lex(); // Eat identifier.
1307 return false;
1308 }
1309 case AsmToken::LParen:
1310 Lex(); // Eat the '('.
1311 return parseParenExpr(Res, EndLoc);
1312 case AsmToken::LBrac:
1313 if (!PlatformParser->HasBracketExpressions())
1314 return TokError("brackets expression not supported on this target");
1315 Lex(); // Eat the '['.
1316 return parseBracketExpr(Res, EndLoc);
1317 case AsmToken::Minus:
1318 Lex(); // Eat the operator.
1319 if (parsePrimaryExpr(Res, EndLoc, TypeInfo))
1320 return true;
1321 Res = MCUnaryExpr::createMinus(Res, getContext(), FirstTokenLoc);
1322 return false;
1323 case AsmToken::Plus:
1324 Lex(); // Eat the operator.
1325 if (parsePrimaryExpr(Res, EndLoc, TypeInfo))
1326 return true;
1327 Res = MCUnaryExpr::createPlus(Res, getContext(), FirstTokenLoc);
1328 return false;
1329 case AsmToken::Tilde:
1330 Lex(); // Eat the operator.
1331 if (parsePrimaryExpr(Res, EndLoc, TypeInfo))
1332 return true;
1333 Res = MCUnaryExpr::createNot(Res, getContext(), FirstTokenLoc);
1334 return false;
1335 // MIPS unary expression operators. The lexer won't generate these tokens if
1336 // MCAsmInfo::HasMipsExpressions is false for the target.
1337 case AsmToken::PercentCall16:
1338 case AsmToken::PercentCall_Hi:
1339 case AsmToken::PercentCall_Lo:
1340 case AsmToken::PercentDtprel_Hi:
1341 case AsmToken::PercentDtprel_Lo:
1342 case AsmToken::PercentGot:
1343 case AsmToken::PercentGot_Disp:
1344 case AsmToken::PercentGot_Hi:
1345 case AsmToken::PercentGot_Lo:
1346 case AsmToken::PercentGot_Ofst:
1347 case AsmToken::PercentGot_Page:
1348 case AsmToken::PercentGottprel:
1349 case AsmToken::PercentGp_Rel:
1350 case AsmToken::PercentHi:
1351 case AsmToken::PercentHigher:
1352 case AsmToken::PercentHighest:
1353 case AsmToken::PercentLo:
1354 case AsmToken::PercentNeg:
1355 case AsmToken::PercentPcrel_Hi:
1356 case AsmToken::PercentPcrel_Lo:
1357 case AsmToken::PercentTlsgd:
1358 case AsmToken::PercentTlsldm:
1359 case AsmToken::PercentTprel_Hi:
1360 case AsmToken::PercentTprel_Lo:
1361 Lex(); // Eat the operator.
1362 if (Lexer.isNot(AsmToken::LParen))
1363 return TokError("expected '(' after operator");
1364 Lex(); // Eat the operator.
1365 if (parseExpression(Res, EndLoc))
1366 return true;
1367 if (Lexer.isNot(AsmToken::RParen))
1368 return TokError("expected ')'");
1369 Lex(); // Eat the operator.
1370 Res = getTargetParser().createTargetUnaryExpr(Res, FirstTokenKind, Ctx);
1371 return !Res;
1372 }
1373}
1374
1375bool AsmParser::parseExpression(const MCExpr *&Res) {
1376 SMLoc EndLoc;
1377 return parseExpression(Res, EndLoc);
1378}
1379
1380const MCExpr *
1381AsmParser::applyModifierToExpr(const MCExpr *E,
1382 MCSymbolRefExpr::VariantKind Variant) {
1383 // Ask the target implementation about this expression first.
1384 const MCExpr *NewE = getTargetParser().applyModifierToExpr(E, Variant, Ctx);
1385 if (NewE)
1386 return NewE;
1387 // Recurse over the given expression, rebuilding it to apply the given variant
1388 // if there is exactly one symbol.
1389 switch (E->getKind()) {
1390 case MCExpr::Target:
1391 case MCExpr::Constant:
1392 return nullptr;
1393
1394 case MCExpr::SymbolRef: {
1395 const MCSymbolRefExpr *SRE = cast<MCSymbolRefExpr>(E);
1396
1397 if (SRE->getKind() != MCSymbolRefExpr::VK_None) {
1398 TokError("invalid variant on expression '" + getTok().getIdentifier() +
1399 "' (already modified)");
1400 return E;
1401 }
1402
1403 return MCSymbolRefExpr::create(&SRE->getSymbol(), Variant, getContext());
1404 }
1405
1406 case MCExpr::Unary: {
1407 const MCUnaryExpr *UE = cast<MCUnaryExpr>(E);
1408 const MCExpr *Sub = applyModifierToExpr(UE->getSubExpr(), Variant);
1409 if (!Sub)
1410 return nullptr;
1411 return MCUnaryExpr::create(UE->getOpcode(), Sub, getContext());
1412 }
1413
1414 case MCExpr::Binary: {
1415 const MCBinaryExpr *BE = cast<MCBinaryExpr>(E);
1416 const MCExpr *LHS = applyModifierToExpr(BE->getLHS(), Variant);
1417 const MCExpr *RHS = applyModifierToExpr(BE->getRHS(), Variant);
1418
1419 if (!LHS && !RHS)
1420 return nullptr;
1421
1422 if (!LHS)
1423 LHS = BE->getLHS();
1424 if (!RHS)
1425 RHS = BE->getRHS();
1426
1427 return MCBinaryExpr::create(BE->getOpcode(), LHS, RHS, getContext());
1428 }
1429 }
1430
1431 llvm_unreachable("Invalid expression kind!")::llvm::llvm_unreachable_internal("Invalid expression kind!",
"/build/llvm-toolchain-snapshot-13~++20210621111111+acefe0eaaf82/llvm/lib/MC/MCParser/AsmParser.cpp"
, 1431)
;
1432}
1433
1434/// This function checks if the next token is <string> type or arithmetic.
1435/// string that begin with character '<' must end with character '>'.
1436/// otherwise it is arithmetics.
1437/// If the function returns a 'true' value,
1438/// the End argument will be filled with the last location pointed to the '>'
1439/// character.
1440
1441/// There is a gap between the AltMacro's documentation and the single quote
1442/// implementation. GCC does not fully support this feature and so we will not
1443/// support it.
1444/// TODO: Adding single quote as a string.
1445static bool isAngleBracketString(SMLoc &StrLoc, SMLoc &EndLoc) {
1446 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~++20210621111111+acefe0eaaf82/llvm/lib/MC/MCParser/AsmParser.cpp"
, 1447, __extension__ __PRETTY_FUNCTION__))
1447 "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~++20210621111111+acefe0eaaf82/llvm/lib/MC/MCParser/AsmParser.cpp"
, 1447, __extension__ __PRETTY_FUNCTION__))
;
1448 const char *CharPtr = StrLoc.getPointer();
1449 while ((*CharPtr != '>') && (*CharPtr != '\n') && (*CharPtr != '\r') &&
1450 (*CharPtr != '\0')) {
1451 if (*CharPtr == '!')
1452 CharPtr++;
1453 CharPtr++;
1454 }
1455 if (*CharPtr == '>') {
1456 EndLoc = StrLoc.getFromPointer(CharPtr + 1);
1457 return true;
1458 }
1459 return false;
1460}
1461
1462/// creating a string without the escape characters '!'.
1463static std::string angleBracketString(StringRef AltMacroStr) {
1464 std::string Res;
1465 for (size_t Pos = 0; Pos < AltMacroStr.size(); Pos++) {
1466 if (AltMacroStr[Pos] == '!')
1467 Pos++;
1468 Res += AltMacroStr[Pos];
1469 }
1470 return Res;
1471}
1472
1473/// Parse an expression and return it.
1474///
1475/// expr ::= expr &&,|| expr -> lowest.
1476/// expr ::= expr |,^,&,! expr
1477/// expr ::= expr ==,!=,<>,<,<=,>,>= expr
1478/// expr ::= expr <<,>> expr
1479/// expr ::= expr +,- expr
1480/// expr ::= expr *,/,% expr -> highest.
1481/// expr ::= primaryexpr
1482///
1483bool AsmParser::parseExpression(const MCExpr *&Res, SMLoc &EndLoc) {
1484 // Parse the expression.
1485 Res = nullptr;
1486 if (getTargetParser().parsePrimaryExpr(Res, EndLoc) ||
1487 parseBinOpRHS(1, Res, EndLoc))
1488 return true;
1489
1490 // As a special case, we support 'a op b @ modifier' by rewriting the
1491 // expression to include the modifier. This is inefficient, but in general we
1492 // expect users to use 'a@modifier op b'.
1493 if (Lexer.getKind() == AsmToken::At) {
1494 Lex();
1495
1496 if (Lexer.isNot(AsmToken::Identifier))
1497 return TokError("unexpected symbol modifier following '@'");
1498
1499 MCSymbolRefExpr::VariantKind Variant =
1500 MCSymbolRefExpr::getVariantKindForName(getTok().getIdentifier());
1501 if (Variant == MCSymbolRefExpr::VK_Invalid)
1502 return TokError("invalid variant '" + getTok().getIdentifier() + "'");
1503
1504 const MCExpr *ModifiedRes = applyModifierToExpr(Res, Variant);
1505 if (!ModifiedRes) {
1506 return TokError("invalid modifier '" + getTok().getIdentifier() +
1507 "' (no symbols present)");
1508 }
1509
1510 Res = ModifiedRes;
1511 Lex();
1512 }
1513
1514 // Try to constant fold it up front, if possible. Do not exploit
1515 // assembler here.
1516 int64_t Value;
1517 if (Res->evaluateAsAbsolute(Value))
1518 Res = MCConstantExpr::create(Value, getContext());
1519
1520 return false;
1521}
1522
1523bool AsmParser::parseParenExpression(const MCExpr *&Res, SMLoc &EndLoc) {
1524 Res = nullptr;
1525 return parseParenExpr(Res, EndLoc) || parseBinOpRHS(1, Res, EndLoc);
1526}
1527
1528bool AsmParser::parseParenExprOfDepth(unsigned ParenDepth, const MCExpr *&Res,
1529 SMLoc &EndLoc) {
1530 if (parseParenExpr(Res, EndLoc))
1531 return true;
1532
1533 for (; ParenDepth > 0; --ParenDepth) {
1534 if (parseBinOpRHS(1, Res, EndLoc))
1535 return true;
1536
1537 // We don't Lex() the last RParen.
1538 // This is the same behavior as parseParenExpression().
1539 if (ParenDepth - 1 > 0) {
1540 EndLoc = getTok().getEndLoc();
1541 if (parseToken(AsmToken::RParen,
1542 "expected ')' in parentheses expression"))
1543 return true;
1544 }
1545 }
1546 return false;
1547}
1548
1549bool AsmParser::parseAbsoluteExpression(int64_t &Res) {
1550 const MCExpr *Expr;
1551
1552 SMLoc StartLoc = Lexer.getLoc();
1553 if (parseExpression(Expr))
1554 return true;
1555
1556 if (!Expr->evaluateAsAbsolute(Res, getStreamer().getAssemblerPtr()))
1557 return Error(StartLoc, "expected absolute expression");
1558
1559 return false;
1560}
1561
1562static unsigned getDarwinBinOpPrecedence(AsmToken::TokenKind K,
1563 MCBinaryExpr::Opcode &Kind,
1564 bool ShouldUseLogicalShr) {
1565 switch (K) {
1566 default:
1567 return 0; // not a binop.
1568
1569 // Lowest Precedence: &&, ||
1570 case AsmToken::AmpAmp:
1571 Kind = MCBinaryExpr::LAnd;
1572 return 1;
1573 case AsmToken::PipePipe:
1574 Kind = MCBinaryExpr::LOr;
1575 return 1;
1576
1577 // Low Precedence: |, &, ^
1578 case AsmToken::Pipe:
1579 Kind = MCBinaryExpr::Or;
1580 return 2;
1581 case AsmToken::Caret:
1582 Kind = MCBinaryExpr::Xor;
1583 return 2;
1584 case AsmToken::Amp:
1585 Kind = MCBinaryExpr::And;
1586 return 2;
1587
1588 // Low Intermediate Precedence: ==, !=, <>, <, <=, >, >=
1589 case AsmToken::EqualEqual:
1590 Kind = MCBinaryExpr::EQ;
1591 return 3;
1592 case AsmToken::ExclaimEqual:
1593 case AsmToken::LessGreater:
1594 Kind = MCBinaryExpr::NE;
1595 return 3;
1596 case AsmToken::Less:
1597 Kind = MCBinaryExpr::LT;
1598 return 3;
1599 case AsmToken::LessEqual:
1600 Kind = MCBinaryExpr::LTE;
1601 return 3;
1602 case AsmToken::Greater:
1603 Kind = MCBinaryExpr::GT;
1604 return 3;
1605 case AsmToken::GreaterEqual:
1606 Kind = MCBinaryExpr::GTE;
1607 return 3;
1608
1609 // Intermediate Precedence: <<, >>
1610 case AsmToken::LessLess:
1611 Kind = MCBinaryExpr::Shl;
1612 return 4;
1613 case AsmToken::GreaterGreater:
1614 Kind = ShouldUseLogicalShr ? MCBinaryExpr::LShr : MCBinaryExpr::AShr;
1615 return 4;
1616
1617 // High Intermediate Precedence: +, -
1618 case AsmToken::Plus:
1619 Kind = MCBinaryExpr::Add;
1620 return 5;
1621 case AsmToken::Minus:
1622 Kind = MCBinaryExpr::Sub;
1623 return 5;
1624
1625 // Highest Precedence: *, /, %
1626 case AsmToken::Star:
1627 Kind = MCBinaryExpr::Mul;
1628 return 6;
1629 case AsmToken::Slash:
1630 Kind = MCBinaryExpr::Div;
1631 return 6;
1632 case AsmToken::Percent:
1633 Kind = MCBinaryExpr::Mod;
1634 return 6;
1635 }
1636}
1637
1638static unsigned getGNUBinOpPrecedence(const MCAsmInfo &MAI,
1639 AsmToken::TokenKind K,
1640 MCBinaryExpr::Opcode &Kind,
1641 bool ShouldUseLogicalShr) {
1642 switch (K) {
1643 default:
1644 return 0; // not a binop.
1645
1646 // Lowest Precedence: &&, ||
1647 case AsmToken::AmpAmp:
1648 Kind = MCBinaryExpr::LAnd;
1649 return 2;
1650 case AsmToken::PipePipe:
1651 Kind = MCBinaryExpr::LOr;
1652 return 1;
1653
1654 // Low Precedence: ==, !=, <>, <, <=, >, >=
1655 case AsmToken::EqualEqual:
1656 Kind = MCBinaryExpr::EQ;
1657 return 3;
1658 case AsmToken::ExclaimEqual:
1659 case AsmToken::LessGreater:
1660 Kind = MCBinaryExpr::NE;
1661 return 3;
1662 case AsmToken::Less:
1663 Kind = MCBinaryExpr::LT;
1664 return 3;
1665 case AsmToken::LessEqual:
1666 Kind = MCBinaryExpr::LTE;
1667 return 3;
1668 case AsmToken::Greater:
1669 Kind = MCBinaryExpr::GT;
1670 return 3;
1671 case AsmToken::GreaterEqual:
1672 Kind = MCBinaryExpr::GTE;
1673 return 3;
1674
1675 // Low Intermediate Precedence: +, -
1676 case AsmToken::Plus:
1677 Kind = MCBinaryExpr::Add;
1678 return 4;
1679 case AsmToken::Minus:
1680 Kind = MCBinaryExpr::Sub;
1681 return 4;
1682
1683 // High Intermediate Precedence: |, !, &, ^
1684 //
1685 case AsmToken::Pipe:
1686 Kind = MCBinaryExpr::Or;
1687 return 5;
1688 case AsmToken::Exclaim:
1689 // Hack to support ARM compatible aliases (implied 'sp' operand in 'srs*'
1690 // instructions like 'srsda #31!') and not parse ! as an infix operator.
1691 if (MAI.getCommentString() == "@")
1692 return 0;
1693 Kind = MCBinaryExpr::OrNot;
1694 return 5;
1695 case AsmToken::Caret:
1696 Kind = MCBinaryExpr::Xor;
1697 return 5;
1698 case AsmToken::Amp:
1699 Kind = MCBinaryExpr::And;
1700 return 5;
1701
1702 // Highest Precedence: *, /, %, <<, >>
1703 case AsmToken::Star:
1704 Kind = MCBinaryExpr::Mul;
1705 return 6;
1706 case AsmToken::Slash:
1707 Kind = MCBinaryExpr::Div;
1708 return 6;
1709 case AsmToken::Percent:
1710 Kind = MCBinaryExpr::Mod;
1711 return 6;
1712 case AsmToken::LessLess:
1713 Kind = MCBinaryExpr::Shl;
1714 return 6;
1715 case AsmToken::GreaterGreater:
1716 Kind = ShouldUseLogicalShr ? MCBinaryExpr::LShr : MCBinaryExpr::AShr;
1717 return 6;
1718 }
1719}
1720
1721unsigned AsmParser::getBinOpPrecedence(AsmToken::TokenKind K,
1722 MCBinaryExpr::Opcode &Kind) {
1723 bool ShouldUseLogicalShr = MAI.shouldUseLogicalShr();
1724 return IsDarwin ? getDarwinBinOpPrecedence(K, Kind, ShouldUseLogicalShr)
1725 : getGNUBinOpPrecedence(MAI, K, Kind, ShouldUseLogicalShr);
1726}
1727
1728/// Parse all binary operators with precedence >= 'Precedence'.
1729/// Res contains the LHS of the expression on input.
1730bool AsmParser::parseBinOpRHS(unsigned Precedence, const MCExpr *&Res,
1731 SMLoc &EndLoc) {
1732 SMLoc StartLoc = Lexer.getLoc();
1733 while (true) {
1734 MCBinaryExpr::Opcode Kind = MCBinaryExpr::Add;
1735 unsigned TokPrec = getBinOpPrecedence(Lexer.getKind(), Kind);
1736
1737 // If the next token is lower precedence than we are allowed to eat, return
1738 // successfully with what we ate already.
1739 if (TokPrec < Precedence)
1740 return false;
1741
1742 Lex();
1743
1744 // Eat the next primary expression.
1745 const MCExpr *RHS;
1746 if (getTargetParser().parsePrimaryExpr(RHS, EndLoc))
1747 return true;
1748
1749 // If BinOp binds less tightly with RHS than the operator after RHS, let
1750 // the pending operator take RHS as its LHS.
1751 MCBinaryExpr::Opcode Dummy;
1752 unsigned NextTokPrec = getBinOpPrecedence(Lexer.getKind(), Dummy);
1753 if (TokPrec < NextTokPrec && parseBinOpRHS(TokPrec + 1, RHS, EndLoc))
1754 return true;
1755
1756 // Merge LHS and RHS according to operator.
1757 Res = MCBinaryExpr::create(Kind, Res, RHS, getContext(), StartLoc);
1758 }
1759}
1760
1761/// ParseStatement:
1762/// ::= EndOfStatement
1763/// ::= Label* Directive ...Operands... EndOfStatement
1764/// ::= Label* Identifier OperandList* EndOfStatement
1765bool AsmParser::parseStatement(ParseStatementInfo &Info,
1766 MCAsmParserSemaCallback *SI) {
1767 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~++20210621111111+acefe0eaaf82/llvm/lib/MC/MCParser/AsmParser.cpp"
, 1767, __extension__ __PRETTY_FUNCTION__))
;
1
'?' condition is true
1768 // Eat initial spaces and comments
1769 while (Lexer.is(AsmToken::Space))
2
Loop condition is false. Execution continues on line 1771
1770 Lex();
1771 if (Lexer.is(AsmToken::EndOfStatement)) {
3
Taking false branch
1772 // if this is a line comment we can drop it safely
1773 if (getTok().getString().empty() || getTok().getString().front() == '\r' ||
1774 getTok().getString().front() == '\n')
1775 Out.AddBlankLine();
1776 Lex();
1777 return false;
1778 }
1779 // Statements always start with an identifier.
1780 AsmToken ID = getTok();
1781 SMLoc IDLoc = ID.getLoc();
1782 StringRef IDVal;
1783 int64_t LocalLabelVal = -1;
1784 StartTokLoc = ID.getLoc();
1785 if (Lexer.is(AsmToken::HashDirective))
4
Taking false branch
1786 return parseCppHashLineFilenameComment(IDLoc,
1787 !isInsideMacroInstantiation());
1788
1789 // Allow an integer followed by a ':' as a directional local label.
1790 if (Lexer.is(AsmToken::Integer)) {
5
Taking false branch
1791 LocalLabelVal = getTok().getIntVal();
1792 if (LocalLabelVal < 0) {
1793 if (!TheCondState.Ignore) {
1794 Lex(); // always eat a token
1795 return Error(IDLoc, "unexpected token at start of statement");
1796 }
1797 IDVal = "";
1798 } else {
1799 IDVal = getTok().getString();
1800 Lex(); // Consume the integer token to be used as an identifier token.
1801 if (Lexer.getKind() != AsmToken::Colon) {
1802 if (!TheCondState.Ignore) {
1803 Lex(); // always eat a token
1804 return Error(IDLoc, "unexpected token at start of statement");
1805 }
1806 }
1807 }
1808 } else if (Lexer.is(AsmToken::Dot)) {
6
Taking false branch
1809 // Treat '.' as a valid identifier in this context.
1810 Lex();
1811 IDVal = ".";
1812 } else if (Lexer.is(AsmToken::LCurly)) {
7
Taking false branch
1813 // Treat '{' as a valid identifier in this context.
1814 Lex();
1815 IDVal = "{";
1816
1817 } else if (Lexer.is(AsmToken::RCurly)) {
8
Taking false branch
1818 // Treat '}' as a valid identifier in this context.
1819 Lex();
1820 IDVal = "}";
1821 } else if (Lexer.is(AsmToken::Star) &&
1822 getTargetParser().starIsStartOfStatement()) {
1823 // Accept '*' as a valid start of statement.
1824 Lex();
1825 IDVal = "*";
1826 } else if (parseIdentifier(IDVal)) {
9
Assuming the condition is false
10
Taking false branch
1827 if (!TheCondState.Ignore) {
1828 Lex(); // always eat a token
1829 return Error(IDLoc, "unexpected token at start of statement");
1830 }
1831 IDVal = "";
1832 }
1833
1834 // Handle conditional assembly here before checking for skipping. We
1835 // have to do this so that .endif isn't skipped in a ".if 0" block for
1836 // example.
1837 StringMap<DirectiveKind>::const_iterator DirKindIt =
1838 DirectiveKindMap.find(IDVal.lower());
1839 DirectiveKind DirKind = (DirKindIt == DirectiveKindMap.end())
11
'?' condition is false
1840 ? DK_NO_DIRECTIVE
1841 : DirKindIt->getValue();
1842 switch (DirKind) {
12
Control jumps to the 'default' case at line 1843
1843 default:
1844 break;
13
Execution continues on line 1880
1845 case DK_IF:
1846 case DK_IFEQ:
1847 case DK_IFGE:
1848 case DK_IFGT:
1849 case DK_IFLE:
1850 case DK_IFLT:
1851 case DK_IFNE:
1852 return parseDirectiveIf(IDLoc, DirKind);
1853 case DK_IFB:
1854 return parseDirectiveIfb(IDLoc, true);
1855 case DK_IFNB:
1856 return parseDirectiveIfb(IDLoc, false);
1857 case DK_IFC:
1858 return parseDirectiveIfc(IDLoc, true);
1859 case DK_IFEQS:
1860 return parseDirectiveIfeqs(IDLoc, true);
1861 case DK_IFNC:
1862 return parseDirectiveIfc(IDLoc, false);
1863 case DK_IFNES:
1864 return parseDirectiveIfeqs(IDLoc, false);
1865 case DK_IFDEF:
1866 return parseDirectiveIfdef(IDLoc, true);
1867 case DK_IFNDEF:
1868 case DK_IFNOTDEF:
1869 return parseDirectiveIfdef(IDLoc, false);
1870 case DK_ELSEIF:
1871 return parseDirectiveElseIf(IDLoc);
1872 case DK_ELSE:
1873 return parseDirectiveElse(IDLoc);
1874 case DK_ENDIF:
1875 return parseDirectiveEndIf(IDLoc);
1876 }
1877
1878 // Ignore the statement if in the middle of inactive conditional
1879 // (e.g. ".if 0").
1880 if (TheCondState.Ignore) {
14
Assuming field 'Ignore' is false
15
Taking false branch
1881 eatToEndOfStatement();
1882 return false;
1883 }
1884
1885 // FIXME: Recurse on local labels?
1886
1887 // See what kind of statement we have.
1888 switch (Lexer.getKind()) {
16
Control jumps to the 'default' case at line 1965
1889 case AsmToken::Colon: {
1890 if (!getTargetParser().isLabel(ID))
1891 break;
1892 if (checkForValidSection())
1893 return true;
1894
1895 // identifier ':' -> Label.
1896 Lex();
1897
1898 // Diagnose attempt to use '.' as a label.
1899 if (IDVal == ".")
1900 return Error(IDLoc, "invalid use of pseudo-symbol '.' as a label");
1901
1902 // Diagnose attempt to use a variable as a label.
1903 //
1904 // FIXME: Diagnostics. Note the location of the definition as a label.
1905 // FIXME: This doesn't diagnose assignment to a symbol which has been
1906 // implicitly marked as external.
1907 MCSymbol *Sym;
1908 if (LocalLabelVal == -1) {
1909 if (ParsingMSInlineAsm && SI) {
1910 StringRef RewrittenLabel =
1911 SI->LookupInlineAsmLabel(IDVal, getSourceManager(), IDLoc, true);
1912 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~++20210621111111+acefe0eaaf82/llvm/lib/MC/MCParser/AsmParser.cpp"
, 1913, __extension__ __PRETTY_FUNCTION__))
1913 "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~++20210621111111+acefe0eaaf82/llvm/lib/MC/MCParser/AsmParser.cpp"
, 1913, __extension__ __PRETTY_FUNCTION__))
;
1914 Info.AsmRewrites->emplace_back(AOK_Label, IDLoc, IDVal.size(),
1915 RewrittenLabel);
1916 IDVal = RewrittenLabel;
1917 }
1918 Sym = getContext().getOrCreateSymbol(IDVal);
1919 } else
1920 Sym = Ctx.createDirectionalLocalSymbol(LocalLabelVal);
1921 // End of Labels should be treated as end of line for lexing
1922 // purposes but that information is not available to the Lexer who
1923 // does not understand Labels. This may cause us to see a Hash
1924 // here instead of a preprocessor line comment.
1925 if (getTok().is(AsmToken::Hash)) {
1926 StringRef CommentStr = parseStringToEndOfStatement();
1927 Lexer.Lex();
1928 Lexer.UnLex(AsmToken(AsmToken::EndOfStatement, CommentStr));
1929 }
1930
1931 // Consume any end of statement token, if present, to avoid spurious
1932 // AddBlankLine calls().
1933 if (getTok().is(AsmToken::EndOfStatement)) {
1934 Lex();
1935 }
1936
1937 if (discardLTOSymbol(IDVal))
1938 return false;
1939
1940 getTargetParser().doBeforeLabelEmit(Sym);
1941
1942 // Emit the label.
1943 if (!getTargetParser().isParsingMSInlineAsm())
1944 Out.emitLabel(Sym, IDLoc);
1945
1946 // If we are generating dwarf for assembly source files then gather the
1947 // info to make a dwarf label entry for this label if needed.
1948 if (enabledGenDwarfForAssembly())
1949 MCGenDwarfLabelEntry::Make(Sym, &getStreamer(), getSourceManager(),
1950 IDLoc);
1951
1952 getTargetParser().onLabelParsed(Sym);
1953
1954 return false;
1955 }
1956
1957 case AsmToken::Equal:
1958 if (!getTargetParser().equalIsAsmAssignment())
1959 break;
1960 // identifier '=' ... -> assignment statement
1961 Lex();
1962
1963 return parseAssignment(IDVal, true);
1964
1965 default: // Normal instruction or directive.
1966 break;
17
Execution continues on line 1970
1967 }
1968
1969 // If macros are enabled, check to see if this is a macro instantiation.
1970 if (areMacrosEnabled())
18
Assuming the condition is false
19
Taking false branch
1971 if (const MCAsmMacro *M = getContext().lookupMacro(IDVal)) {
1972 return handleMacroEntry(M, IDLoc);
1973 }
1974
1975 // Otherwise, we have a normal instruction or directive.
1976
1977 // Directives start with "."
1978 if (IDVal.startswith(".") && IDVal != ".") {
20
Assuming the condition is true
21
Taking true branch
1979 // There are several entities interested in parsing directives:
1980 //
1981 // 1. The target-specific assembly parser. Some directives are target
1982 // specific or may potentially behave differently on certain targets.
1983 // 2. Asm parser extensions. For example, platform-specific parsers
1984 // (like the ELF parser) register themselves as extensions.
1985 // 3. The generic directive parser implemented by this class. These are
1986 // all the directives that behave in a target and platform independent
1987 // manner, or at least have a default behavior that's shared between
1988 // all targets and platforms.
1989
1990 getTargetParser().flushPendingInstructions(getStreamer());
1991
1992 SMLoc StartTokLoc = getTok().getLoc();
1993 bool TPDirectiveReturn = getTargetParser().ParseDirective(ID);
1994
1995 if (hasPendingError())
22
Taking false branch
1996 return true;
1997 // Currently the return value should be true if we are
1998 // uninterested but as this is at odds with the standard parsing
1999 // convention (return true = error) we have instances of a parsed
2000 // directive that fails returning true as an error. Catch these
2001 // cases as best as possible errors here.
2002 if (TPDirectiveReturn && StartTokLoc != getTok().getLoc())
23
Assuming 'TPDirectiveReturn' is true
24
Taking false branch
2003 return true;
2004 // Return if we did some parsing or believe we succeeded.
2005 if (!TPDirectiveReturn
24.1
'TPDirectiveReturn' is true
24.1
'TPDirectiveReturn' is true
24.1
'TPDirectiveReturn' is true
|| StartTokLoc != getTok().getLoc())
25
Taking false branch
2006 return false;
2007
2008 // Next, check the extension directive map to see if any extension has
2009 // registered itself to parse this directive.
2010 std::pair<MCAsmParserExtension *, DirectiveHandler> Handler =
2011 ExtensionDirectiveMap.lookup(IDVal);
2012 if (Handler.first)
26
Assuming field 'first' is null
27
Taking false branch
2013 return (*Handler.second)(Handler.first, IDVal, IDLoc);
2014
2015 // Finally, if no one else is interested in this directive, it must be
2016 // generic and familiar to this class.
2017 switch (DirKind) {
28
Control jumps to 'case DK_PSEUDO_PROBE:' at line 2280
2018 default:
2019 break;
2020 case DK_SET:
2021 case DK_EQU:
2022 return parseDirectiveSet(IDVal, true);
2023 case DK_EQUIV:
2024 return parseDirectiveSet(IDVal, false);
2025 case DK_ASCII:
2026 return parseDirectiveAscii(IDVal, false);
2027 case DK_ASCIZ:
2028 case DK_STRING:
2029 return parseDirectiveAscii(IDVal, true);
2030 case DK_BYTE:
2031 case DK_DC_B:
2032 return parseDirectiveValue(IDVal, 1);
2033 case DK_DC:
2034 case DK_DC_W:
2035 case DK_SHORT:
2036 case DK_VALUE:
2037 case DK_2BYTE:
2038 return parseDirectiveValue(IDVal, 2);
2039 case DK_LONG:
2040 case DK_INT:
2041 case DK_4BYTE:
2042 case DK_DC_L:
2043 return parseDirectiveValue(IDVal, 4);
2044 case DK_QUAD:
2045 case DK_8BYTE:
2046 return parseDirectiveValue(IDVal, 8);
2047 case DK_DC_A:
2048 return parseDirectiveValue(
2049 IDVal, getContext().getAsmInfo()->getCodePointerSize());
2050 case DK_OCTA:
2051 return parseDirectiveOctaValue(IDVal);
2052 case DK_SINGLE:
2053 case DK_FLOAT:
2054 case DK_DC_S:
2055 return parseDirectiveRealValue(IDVal, APFloat::IEEEsingle());
2056 case DK_DOUBLE:
2057 case DK_DC_D:
2058 return parseDirectiveRealValue(IDVal, APFloat::IEEEdouble());
2059 case DK_ALIGN: {
2060 bool IsPow2 = !getContext().getAsmInfo()->getAlignmentIsInBytes();
2061 return parseDirectiveAlign(IsPow2, /*ExprSize=*/1);
2062 }
2063 case DK_ALIGN32: {
2064 bool IsPow2 = !getContext().getAsmInfo()->getAlignmentIsInBytes();
2065 return parseDirectiveAlign(IsPow2, /*ExprSize=*/4);
2066 }
2067 case DK_BALIGN:
2068 return parseDirectiveAlign(/*IsPow2=*/false, /*ExprSize=*/1);
2069 case DK_BALIGNW:
2070 return parseDirectiveAlign(/*IsPow2=*/false, /*ExprSize=*/2);
2071 case DK_BALIGNL:
2072 return parseDirectiveAlign(/*IsPow2=*/false, /*ExprSize=*/4);
2073 case DK_P2ALIGN:
2074 return parseDirectiveAlign(/*IsPow2=*/true, /*ExprSize=*/1);
2075 case DK_P2ALIGNW:
2076 return parseDirectiveAlign(/*IsPow2=*/true, /*ExprSize=*/2);
2077 case DK_P2ALIGNL:
2078 return parseDirectiveAlign(/*IsPow2=*/true, /*ExprSize=*/4);
2079 case DK_ORG:
2080 return parseDirectiveOrg();
2081 case DK_FILL:
2082 return parseDirectiveFill();
2083 case DK_ZERO:
2084 return parseDirectiveZero();
2085 case DK_EXTERN:
2086 eatToEndOfStatement(); // .extern is the default, ignore it.
2087 return false;
2088 case DK_GLOBL:
2089 case DK_GLOBAL:
2090 return parseDirectiveSymbolAttribute(MCSA_Global);
2091 case DK_LAZY_REFERENCE:
2092 return parseDirectiveSymbolAttribute(MCSA_LazyReference);
2093 case DK_NO_DEAD_STRIP:
2094 return parseDirectiveSymbolAttribute(MCSA_NoDeadStrip);
2095 case DK_SYMBOL_RESOLVER:
2096 return parseDirectiveSymbolAttribute(MCSA_SymbolResolver);
2097 case DK_PRIVATE_EXTERN:
2098 return parseDirectiveSymbolAttribute(MCSA_PrivateExtern);
2099 case DK_REFERENCE:
2100 return parseDirectiveSymbolAttribute(MCSA_Reference);
2101 case DK_WEAK_DEFINITION:
2102 return parseDirectiveSymbolAttribute(MCSA_WeakDefinition);
2103 case DK_WEAK_REFERENCE:
2104 return parseDirectiveSymbolAttribute(MCSA_WeakReference);
2105 case DK_WEAK_DEF_CAN_BE_HIDDEN:
2106 return parseDirectiveSymbolAttribute(MCSA_WeakDefAutoPrivate);
2107 case DK_COLD:
2108 return parseDirectiveSymbolAttribute(MCSA_Cold);
2109 case DK_COMM:
2110 case DK_COMMON:
2111 return parseDirectiveComm(/*IsLocal=*/false);
2112 case DK_LCOMM:
2113 return parseDirectiveComm(/*IsLocal=*/true);
2114 case DK_ABORT:
2115 return parseDirectiveAbort();
2116 case DK_INCLUDE:
2117 return parseDirectiveInclude();
2118 case DK_INCBIN:
2119 return parseDirectiveIncbin();
2120 case DK_CODE16:
2121 case DK_CODE16GCC:
2122 return TokError(Twine(IDVal) +
2123 " not currently supported for this target");
2124 case DK_REPT:
2125 return parseDirectiveRept(IDLoc, IDVal);
2126 case DK_IRP:
2127 return parseDirectiveIrp(IDLoc);
2128 case DK_IRPC:
2129 return parseDirectiveIrpc(IDLoc);
2130 case DK_ENDR:
2131 return parseDirectiveEndr(IDLoc);
2132 case DK_BUNDLE_ALIGN_MODE:
2133 return parseDirectiveBundleAlignMode();
2134 case DK_BUNDLE_LOCK:
2135 return parseDirectiveBundleLock();
2136 case DK_BUNDLE_UNLOCK:
2137 return parseDirectiveBundleUnlock();
2138 case DK_SLEB128:
2139 return parseDirectiveLEB128(true);
2140 case DK_ULEB128:
2141 return parseDirectiveLEB128(false);
2142 case DK_SPACE:
2143 case DK_SKIP:
2144 return parseDirectiveSpace(IDVal);
2145 case DK_FILE:
2146 return parseDirectiveFile(IDLoc);
2147 case DK_LINE:
2148 return parseDirectiveLine();
2149 case DK_LOC:
2150 return parseDirectiveLoc();
2151 case DK_STABS:
2152 return parseDirectiveStabs();
2153 case DK_CV_FILE:
2154 return parseDirectiveCVFile();
2155 case DK_CV_FUNC_ID:
2156 return parseDirectiveCVFuncId();
2157 case DK_CV_INLINE_SITE_ID:
2158 return parseDirectiveCVInlineSiteId();
2159 case DK_CV_LOC:
2160 return parseDirectiveCVLoc();
2161 case DK_CV_LINETABLE:
2162 return parseDirectiveCVLinetable();
2163 case DK_CV_INLINE_LINETABLE:
2164 return parseDirectiveCVInlineLinetable();
2165 case DK_CV_DEF_RANGE:
2166 return parseDirectiveCVDefRange();
2167 case DK_CV_STRING:
2168 return parseDirectiveCVString();
2169 case DK_CV_STRINGTABLE:
2170 return parseDirectiveCVStringTable();
2171 case DK_CV_FILECHECKSUMS:
2172 return parseDirectiveCVFileChecksums();
2173 case DK_CV_FILECHECKSUM_OFFSET:
2174 return parseDirectiveCVFileChecksumOffset();
2175 case DK_CV_FPO_DATA:
2176 return parseDirectiveCVFPOData();
2177 case DK_CFI_SECTIONS:
2178 return parseDirectiveCFISections();
2179 case DK_CFI_STARTPROC:
2180 return parseDirectiveCFIStartProc();
2181 case DK_CFI_ENDPROC:
2182 return parseDirectiveCFIEndProc();
2183 case DK_CFI_DEF_CFA:
2184 return parseDirectiveCFIDefCfa(IDLoc);
2185 case DK_CFI_DEF_CFA_OFFSET:
2186 return parseDirectiveCFIDefCfaOffset();
2187 case DK_CFI_ADJUST_CFA_OFFSET:
2188 return parseDirectiveCFIAdjustCfaOffset();
2189 case DK_CFI_DEF_CFA_REGISTER:
2190 return parseDirectiveCFIDefCfaRegister(IDLoc);
2191 case DK_CFI_LLVM_DEF_ASPACE_CFA:
2192 return parseDirectiveCFILLVMDefAspaceCfa(IDLoc);
2193 case DK_CFI_OFFSET:
2194 return parseDirectiveCFIOffset(IDLoc);
2195 case DK_CFI_REL_OFFSET:
2196 return parseDirectiveCFIRelOffset(IDLoc);
2197 case DK_CFI_PERSONALITY:
2198 return parseDirectiveCFIPersonalityOrLsda(true);
2199 case DK_CFI_LSDA:
2200 return parseDirectiveCFIPersonalityOrLsda(false);
2201 case DK_CFI_REMEMBER_STATE:
2202 return parseDirectiveCFIRememberState();
2203 case DK_CFI_RESTORE_STATE:
2204 return parseDirectiveCFIRestoreState();
2205 case DK_CFI_SAME_VALUE:
2206 return parseDirectiveCFISameValue(IDLoc);
2207 case DK_CFI_RESTORE:
2208 return parseDirectiveCFIRestore(IDLoc);
2209 case DK_CFI_ESCAPE:
2210 return parseDirectiveCFIEscape();
2211 case DK_CFI_RETURN_COLUMN:
2212 return parseDirectiveCFIReturnColumn(IDLoc);
2213 case DK_CFI_SIGNAL_FRAME:
2214 return parseDirectiveCFISignalFrame();
2215 case DK_CFI_UNDEFINED:
2216 return parseDirectiveCFIUndefined(IDLoc);
2217 case DK_CFI_REGISTER:
2218 return parseDirectiveCFIRegister(IDLoc);
2219 case DK_CFI_WINDOW_SAVE:
2220 return parseDirectiveCFIWindowSave();
2221 case DK_MACROS_ON:
2222 case DK_MACROS_OFF:
2223 return parseDirectiveMacrosOnOff(IDVal);
2224 case DK_MACRO:
2225 return parseDirectiveMacro(IDLoc);
2226 case DK_ALTMACRO:
2227 case DK_NOALTMACRO:
2228 return parseDirectiveAltmacro(IDVal);
2229 case DK_EXITM:
2230 return parseDirectiveExitMacro(IDVal);
2231 case DK_ENDM:
2232 case DK_ENDMACRO:
2233 return parseDirectiveEndMacro(IDVal);
2234 case DK_PURGEM:
2235 return parseDirectivePurgeMacro(IDLoc);
2236 case DK_END:
2237 return parseDirectiveEnd(IDLoc);
2238 case DK_ERR:
2239 return parseDirectiveError(IDLoc, false);
2240 case DK_ERROR:
2241 return parseDirectiveError(IDLoc, true);
2242 case DK_WARNING:
2243 return parseDirectiveWarning(IDLoc);
2244 case DK_RELOC:
2245 return parseDirectiveReloc(IDLoc);
2246 case DK_DCB:
2247 case DK_DCB_W:
2248 return parseDirectiveDCB(IDVal, 2);
2249 case DK_DCB_B:
2250 return parseDirectiveDCB(IDVal, 1);
2251 case DK_DCB_D:
2252 return parseDirectiveRealDCB(IDVal, APFloat::IEEEdouble());
2253 case DK_DCB_L:
2254 return parseDirectiveDCB(IDVal, 4);
2255 case DK_DCB_S:
2256 return parseDirectiveRealDCB(IDVal, APFloat::IEEEsingle());
2257 case DK_DC_X:
2258 case DK_DCB_X:
2259 return TokError(Twine(IDVal) +
2260 " not currently supported for this target");
2261 case DK_DS:
2262 case DK_DS_W:
2263 return parseDirectiveDS(IDVal, 2);
2264 case DK_DS_B:
2265 return parseDirectiveDS(IDVal, 1);
2266 case DK_DS_D:
2267 return parseDirectiveDS(IDVal, 8);
2268 case DK_DS_L:
2269 case DK_DS_S:
2270 return parseDirectiveDS(IDVal, 4);
2271 case DK_DS_P:
2272 case DK_DS_X:
2273 return parseDirectiveDS(IDVal, 12);
2274 case DK_PRINT:
2275 return parseDirectivePrint(IDLoc);
2276 case DK_ADDRSIG:
2277 return parseDirectiveAddrsig();
2278 case DK_ADDRSIG_SYM:
2279 return parseDirectiveAddrsigSym();
2280 case DK_PSEUDO_PROBE:
2281 return parseDirectivePseudoProbe();
29
Calling 'AsmParser::parseDirectivePseudoProbe'
2282 case DK_LTO_DISCARD:
2283 return parseDirectiveLTODiscard();
2284 }
2285
2286 return Error(IDLoc, "unknown directive");
2287 }
2288
2289 // __asm _emit or __asm __emit
2290 if (ParsingMSInlineAsm && (IDVal == "_emit" || IDVal == "__emit" ||
2291 IDVal == "_EMIT" || IDVal == "__EMIT"))
2292 return parseDirectiveMSEmit(IDLoc, Info, IDVal.size());
2293
2294 // __asm align
2295 if (ParsingMSInlineAsm && (IDVal == "align" || IDVal == "ALIGN"))
2296 return parseDirectiveMSAlign(IDLoc, Info);
2297
2298 if (ParsingMSInlineAsm && (IDVal == "even" || IDVal == "EVEN"))
2299 Info.AsmRewrites->emplace_back(AOK_EVEN, IDLoc, 4);
2300 if (checkForValidSection())
2301 return true;
2302
2303 return parseAndMatchAndEmitTargetInstruction(Info, IDVal, ID, IDLoc);
2304}
2305
2306bool AsmParser::parseAndMatchAndEmitTargetInstruction(ParseStatementInfo &Info,
2307 StringRef IDVal,
2308 AsmToken ID,
2309 SMLoc IDLoc) {
2310 // Canonicalize the opcode to lower case.
2311 std::string OpcodeStr = IDVal.lower();
2312 ParseInstructionInfo IInfo(Info.AsmRewrites);
2313 bool ParseHadError = getTargetParser().ParseInstruction(IInfo, OpcodeStr, ID,
2314 Info.ParsedOperands);
2315 Info.ParseError = ParseHadError;
2316
2317 // Dump the parsed representation, if requested.
2318 if (getShowParsedOperands()) {
2319 SmallString<256> Str;
2320 raw_svector_ostream OS(Str);
2321 OS << "parsed instruction: [";
2322 for (unsigned i = 0; i != Info.ParsedOperands.size(); ++i) {
2323 if (i != 0)
2324 OS << ", ";
2325 Info.ParsedOperands[i]->print(OS);
2326 }
2327 OS << "]";
2328
2329 printMessage(IDLoc, SourceMgr::DK_Note, OS.str());
2330 }
2331
2332 // Fail even if ParseInstruction erroneously returns false.
2333 if (hasPendingError() || ParseHadError)
2334 return true;
2335
2336 // If we are generating dwarf for the current section then generate a .loc
2337 // directive for the instruction.
2338 if (!ParseHadError && enabledGenDwarfForAssembly() &&
2339 getContext().getGenDwarfSectionSyms().count(
2340 getStreamer().getCurrentSectionOnly())) {
2341 unsigned Line;
2342 if (ActiveMacros.empty())
2343 Line = SrcMgr.FindLineNumber(IDLoc, CurBuffer);
2344 else
2345 Line = SrcMgr.FindLineNumber(ActiveMacros.front()->InstantiationLoc,
2346 ActiveMacros.front()->ExitBuffer);
2347
2348 // If we previously parsed a cpp hash file line comment then make sure the
2349 // current Dwarf File is for the CppHashFilename if not then emit the
2350 // Dwarf File table for it and adjust the line number for the .loc.
2351 if (!CppHashInfo.Filename.empty()) {
2352 unsigned FileNumber = getStreamer().emitDwarfFileDirective(
2353 0, StringRef(), CppHashInfo.Filename);
2354 getContext().setGenDwarfFileNumber(FileNumber);
2355
2356 unsigned CppHashLocLineNo =
2357 SrcMgr.FindLineNumber(CppHashInfo.Loc, CppHashInfo.Buf);
2358 Line = CppHashInfo.LineNumber - 1 + (Line - CppHashLocLineNo);
2359 }
2360
2361 getStreamer().emitDwarfLocDirective(
2362 getContext().getGenDwarfFileNumber(), Line, 0,
2363 DWARF2_LINE_DEFAULT_IS_STMT1 ? DWARF2_FLAG_IS_STMT(1 << 0) : 0, 0, 0,
2364 StringRef());
2365 }
2366
2367 // If parsing succeeded, match the instruction.
2368 if (!ParseHadError) {
2369 uint64_t ErrorInfo;
2370 if (getTargetParser().MatchAndEmitInstruction(
2371 IDLoc, Info.Opcode, Info.ParsedOperands, Out, ErrorInfo,
2372 getTargetParser().isParsingMSInlineAsm()))
2373 return true;
2374 }
2375 return false;
2376}
2377
2378// Parse and erase curly braces marking block start/end
2379bool
2380AsmParser::parseCurlyBlockScope(SmallVectorImpl<AsmRewrite> &AsmStrRewrites) {
2381 // Identify curly brace marking block start/end
2382 if (Lexer.isNot(AsmToken::LCurly) && Lexer.isNot(AsmToken::RCurly))
2383 return false;
2384
2385 SMLoc StartLoc = Lexer.getLoc();
2386 Lex(); // Eat the brace
2387 if (Lexer.is(AsmToken::EndOfStatement))
2388 Lex(); // Eat EndOfStatement following the brace
2389
2390 // Erase the block start/end brace from the output asm string
2391 AsmStrRewrites.emplace_back(AOK_Skip, StartLoc, Lexer.getLoc().getPointer() -
2392 StartLoc.getPointer());
2393 return true;
2394}
2395
2396/// parseCppHashLineFilenameComment as this:
2397/// ::= # number "filename"
2398bool AsmParser::parseCppHashLineFilenameComment(SMLoc L, bool SaveLocInfo) {
2399 Lex(); // Eat the hash token.
2400 // Lexer only ever emits HashDirective if it fully formed if it's
2401 // done the checking already so this is an internal error.
2402 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~++20210621111111+acefe0eaaf82/llvm/lib/MC/MCParser/AsmParser.cpp"
, 2403, __extension__ __PRETTY_FUNCTION__))
2403 "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~++20210621111111+acefe0eaaf82/llvm/lib/MC/MCParser/AsmParser.cpp"
, 2403, __extension__ __PRETTY_FUNCTION__))
;
2404 int64_t LineNumber = getTok().getIntVal();
2405 Lex();
2406 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~++20210621111111+acefe0eaaf82/llvm/lib/MC/MCParser/AsmParser.cpp"
, 2407, __extension__ __PRETTY_FUNCTION__))
2407 "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~++20210621111111+acefe0eaaf82/llvm/lib/MC/MCParser/AsmParser.cpp"
, 2407, __extension__ __PRETTY_FUNCTION__))
;
2408 StringRef Filename = getTok().getString();
2409 Lex();
2410
2411 if (!SaveLocInfo)
2412 return false;
2413
2414 // Get rid of the enclosing quotes.
2415 Filename = Filename.substr(1, Filename.size() - 2);
2416
2417 // Save the SMLoc, Filename and LineNumber for later use by diagnostics
2418 // and possibly DWARF file info.
2419 CppHashInfo.Loc = L;
2420 CppHashInfo.Filename = Filename;
2421 CppHashInfo.LineNumber = LineNumber;
2422 CppHashInfo.Buf = CurBuffer;
2423 if (FirstCppHashFilename.empty())
2424 FirstCppHashFilename = Filename;
2425 return false;
2426}
2427
2428/// will use the last parsed cpp hash line filename comment
2429/// for the Filename and LineNo if any in the diagnostic.
2430void AsmParser::DiagHandler(const SMDiagnostic &Diag, void *Context) {
2431 auto *Parser = static_cast<AsmParser *>(Context);
2432 raw_ostream &OS = errs();
2433
2434 const SourceMgr &DiagSrcMgr = *Diag.getSourceMgr();
2435 SMLoc DiagLoc = Diag.getLoc();
2436 unsigned DiagBuf = DiagSrcMgr.FindBufferContainingLoc(DiagLoc);
2437 unsigned CppHashBuf =
2438 Parser->SrcMgr.FindBufferContainingLoc(Parser->CppHashInfo.Loc);
2439
2440 // Like SourceMgr::printMessage() we need to print the include stack if any
2441 // before printing the message.
2442 unsigned DiagCurBuffer = DiagSrcMgr.FindBufferContainingLoc(DiagLoc);
2443 if (!Parser->SavedDiagHandler && DiagCurBuffer &&
2444 DiagCurBuffer != DiagSrcMgr.getMainFileID()) {
2445 SMLoc ParentIncludeLoc = DiagSrcMgr.getParentIncludeLoc(DiagCurBuffer);
2446 DiagSrcMgr.PrintIncludeStack(ParentIncludeLoc, OS);
2447 }
2448
2449 // If we have not parsed a cpp hash line filename comment or the source
2450 // manager changed or buffer changed (like in a nested include) then just
2451 // print the normal diagnostic using its Filename and LineNo.
2452 if (!Parser->CppHashInfo.LineNumber || DiagBuf != CppHashBuf) {
2453 if (Parser->SavedDiagHandler)
2454 Parser->SavedDiagHandler(Diag, Parser->SavedDiagContext);
2455 else
2456 Parser->getContext().diagnose(Diag);
2457 return;
2458 }
2459
2460 // Use the CppHashFilename and calculate a line number based on the
2461 // CppHashInfo.Loc and CppHashInfo.LineNumber relative to this Diag's SMLoc
2462 // for the diagnostic.
2463 const std::string &Filename = std::string(Parser->CppHashInfo.Filename);
2464
2465 int DiagLocLineNo = DiagSrcMgr.FindLineNumber(DiagLoc, DiagBuf);
2466 int CppHashLocLineNo =
2467 Parser->SrcMgr.FindLineNumber(Parser->CppHashInfo.Loc, CppHashBuf);
2468 int LineNo =
2469 Parser->CppHashInfo.LineNumber - 1 + (DiagLocLineNo - CppHashLocLineNo);
2470
2471 SMDiagnostic NewDiag(*Diag.getSourceMgr(), Diag.getLoc(), Filename, LineNo,
2472 Diag.getColumnNo(), Diag.getKind(), Diag.getMessage(),
2473 Diag.getLineContents(), Diag.getRanges());
2474
2475 if (Parser->SavedDiagHandler)
2476 Parser->SavedDiagHandler(Diag, Parser->SavedDiagContext);
2477 else
2478 Parser->getContext().diagnose(NewDiag);
2479}
2480
2481// FIXME: This is mostly duplicated from the function in AsmLexer.cpp. The
2482// difference being that that function accepts '@' as part of identifiers and
2483// we can't do that. AsmLexer.cpp should probably be changed to handle
2484// '@' as a special case when needed.
2485static bool isIdentifierChar(char c) {
2486 return isalnum(static_cast<unsigned char>(c)) || c == '_' || c == '$' ||
2487 c == '.';
2488}
2489
2490bool AsmParser::expandMacro(raw_svector_ostream &OS, StringRef Body,
2491 ArrayRef<MCAsmMacroParameter> Parameters,
2492 ArrayRef<MCAsmMacroArgument> A,
2493 bool EnableAtPseudoVariable, SMLoc L) {
2494 unsigned NParameters = Parameters.size();
2495 bool HasVararg = NParameters ? Parameters.back().Vararg : false;
2496 if ((!IsDarwin || NParameters != 0) && NParameters != A.size())
2497 return Error(L, "Wrong number of arguments");
2498
2499 // A macro without parameters is handled differently on Darwin:
2500 // gas accepts no arguments and does no substitutions
2501 while (!Body.empty()) {
2502 // Scan for the next substitution.
2503 std::size_t End = Body.size(), Pos = 0;
2504 for (; Pos != End; ++Pos) {
2505 // Check for a substitution or escape.
2506 if (IsDarwin && !NParameters) {
2507 // This macro has no parameters, look for $0, $1, etc.
2508 if (Body[Pos] != '$' || Pos + 1 == End)
2509 continue;
2510
2511 char Next = Body[Pos + 1];
2512 if (Next == '$' || Next == 'n' ||
2513 isdigit(static_cast<unsigned char>(Next)))
2514 break;
2515 } else {
2516 // This macro has parameters, look for \foo, \bar, etc.
2517 if (Body[Pos] == '\\' && Pos + 1 != End)
2518 break;
2519 }
2520 }
2521
2522 // Add the prefix.
2523 OS << Body.slice(0, Pos);
2524
2525 // Check if we reached the end.
2526 if (Pos == End)
2527 break;
2528
2529 if (IsDarwin && !NParameters) {
2530 switch (Body[Pos + 1]) {
2531 // $$ => $
2532 case '$':
2533 OS << '$';
2534 break;
2535
2536 // $n => number of arguments
2537 case 'n':
2538 OS << A.size();
2539 break;
2540
2541 // $[0-9] => argument
2542 default: {
2543 // Missing arguments are ignored.
2544 unsigned Index = Body[Pos + 1] - '0';
2545 if (Index >= A.size())
2546 break;
2547
2548 // Otherwise substitute with the token values, with spaces eliminated.
2549 for (const AsmToken &Token : A[Index])
2550 OS << Token.getString();
2551 break;
2552 }
2553 }
2554 Pos += 2;
2555 } else {
2556 unsigned I = Pos + 1;
2557
2558 // Check for the \@ pseudo-variable.
2559 if (EnableAtPseudoVariable && Body[I] == '@' && I + 1 != End)
2560 ++I;
2561 else
2562 while (isIdentifierChar(Body[I]) && I + 1 != End)
2563 ++I;
2564
2565 const char *Begin = Body.data() + Pos + 1;
2566 StringRef Argument(Begin, I - (Pos + 1));
2567 unsigned Index = 0;
2568
2569 if (Argument == "@") {
2570 OS << NumOfMacroInstantiations;
2571 Pos += 2;
2572 } else {
2573 for (; Index < NParameters; ++Index)
2574 if (Parameters[Index].Name == Argument)
2575 break;
2576
2577 if (Index == NParameters) {
2578 if (Body[Pos + 1] == '(' && Body[Pos + 2] == ')')
2579 Pos += 3;
2580 else {
2581 OS << '\\' << Argument;
2582 Pos = I;
2583 }
2584 } else {
2585 bool VarargParameter = HasVararg && Index == (NParameters - 1);
2586 for (const AsmToken &Token : A[Index])
2587 // For altmacro mode, you can write '%expr'.
2588 // The prefix '%' evaluates the expression 'expr'
2589 // and uses the result as a string (e.g. replace %(1+2) with the
2590 // string "3").
2591 // Here, we identify the integer token which is the result of the
2592 // absolute expression evaluation and replace it with its string
2593 // representation.
2594 if (AltMacroMode && Token.getString().front() == '%' &&
2595 Token.is(AsmToken::Integer))
2596 // Emit an integer value to the buffer.
2597 OS << Token.getIntVal();
2598 // Only Token that was validated as a string and begins with '<'
2599 // is considered altMacroString!!!
2600 else if (AltMacroMode && Token.getString().front() == '<' &&
2601 Token.is(AsmToken::String)) {
2602 OS << angleBracketString(Token.getStringContents());
2603 }
2604 // We expect no quotes around the string's contents when
2605 // parsing for varargs.
2606 else if (Token.isNot(AsmToken::String) || VarargParameter)
2607 OS << Token.getString();
2608 else
2609 OS << Token.getStringContents();
2610
2611 Pos += 1 + Argument.size();
2612 }
2613 }
2614 }
2615 // Update the scan point.
2616 Body = Body.substr(Pos);
2617 }
2618
2619 return false;
2620}
2621
2622static bool isOperator(AsmToken::TokenKind kind) {
2623 switch (kind) {
2624 default:
2625 return false;
2626 case AsmToken::Plus:
2627 case AsmToken::Minus:
2628 case AsmToken::Tilde:
2629 case AsmToken::Slash:
2630 case AsmToken::Star:
2631 case AsmToken::Dot:
2632 case AsmToken::Equal:
2633 case AsmToken::EqualEqual:
2634 case AsmToken::Pipe:
2635 case AsmToken::PipePipe:
2636 case AsmToken::Caret:
2637 case AsmToken::Amp:
2638 case AsmToken::AmpAmp:
2639 case AsmToken::Exclaim:
2640 case AsmToken::ExclaimEqual:
2641 case AsmToken::Less:
2642 case AsmToken::LessEqual:
2643 case AsmToken::LessLess:
2644 case AsmToken::LessGreater:
2645 case AsmToken::Greater:
2646 case AsmToken::GreaterEqual:
2647 case AsmToken::GreaterGreater:
2648 return true;
2649 }
2650}
2651
2652namespace {
2653
2654class AsmLexerSkipSpaceRAII {
2655public:
2656 AsmLexerSkipSpaceRAII(AsmLexer &Lexer, bool SkipSpace) : Lexer(Lexer) {
2657 Lexer.setSkipSpace(SkipSpace);
2658 }
2659
2660 ~AsmLexerSkipSpaceRAII() {
2661 Lexer.setSkipSpace(true);
2662 }
2663
2664private:
2665 AsmLexer &Lexer;
2666};
2667
2668} // end anonymous namespace
2669
2670bool AsmParser::parseMacroArgument(MCAsmMacroArgument &MA, bool Vararg) {
2671
2672 if (Vararg) {
2673 if (Lexer.isNot(AsmToken::EndOfStatement)) {
2674 StringRef Str = parseStringToEndOfStatement();
2675 MA.emplace_back(AsmToken::String, Str);
2676 }
2677 return false;
2678 }
2679
2680 unsigned ParenLevel = 0;
2681
2682 // Darwin doesn't use spaces to delmit arguments.
2683 AsmLexerSkipSpaceRAII ScopedSkipSpace(Lexer, IsDarwin);
2684
2685 bool SpaceEaten;
2686
2687 while (true) {
2688 SpaceEaten = false;
2689 if (Lexer.is(AsmToken::Eof) || Lexer.is(AsmToken::Equal))
2690 return TokError("unexpected token in macro instantiation");
2691
2692 if (ParenLevel == 0) {
2693
2694 if (Lexer.is(AsmToken::Comma))
2695 break;
2696
2697 if (Lexer.is(AsmToken::Space)) {
2698 SpaceEaten = true;
2699 Lexer.Lex(); // Eat spaces
2700 }
2701
2702 // Spaces can delimit parameters, but could also be part an expression.
2703 // If the token after a space is an operator, add the token and the next
2704 // one into this argument
2705 if (!IsDarwin) {
2706 if (isOperator(Lexer.getKind())) {
2707 MA.push_back(getTok());
2708 Lexer.Lex();
2709
2710 // Whitespace after an operator can be ignored.
2711 if (Lexer.is(AsmToken::Space))
2712 Lexer.Lex();
2713
2714 continue;
2715 }
2716 }
2717 if (SpaceEaten)
2718 break;
2719 }
2720
2721 // handleMacroEntry relies on not advancing the lexer here
2722 // to be able to fill in the remaining default parameter values
2723 if (Lexer.is(AsmToken::EndOfStatement))
2724 break;
2725
2726 // Adjust the current parentheses level.
2727 if (Lexer.is(AsmToken::LParen))
2728 ++ParenLevel;
2729 else if (Lexer.is(AsmToken::RParen) && ParenLevel)
2730 --ParenLevel;
2731
2732 // Append the token to the current argument list.
2733 MA.push_back(getTok());
2734 Lexer.Lex();
2735 }
2736
2737 if (ParenLevel != 0)
2738 return TokError("unbalanced parentheses in macro argument");
2739 return false;
2740}
2741
2742// Parse the macro instantiation arguments.
2743bool AsmParser::parseMacroArguments(const MCAsmMacro *M,
2744 MCAsmMacroArguments &A) {
2745 const unsigned NParameters = M ? M->Parameters.size() : 0;
2746 bool NamedParametersFound = false;
2747 SmallVector<SMLoc, 4> FALocs;
2748
2749 A.resize(NParameters);
2750 FALocs.resize(NParameters);
2751
2752 // Parse two kinds of macro invocations:
2753 // - macros defined without any parameters accept an arbitrary number of them
2754 // - macros defined with parameters accept at most that many of them
2755 bool HasVararg = NParameters ? M->Parameters.back().Vararg : false;
2756 for (unsigned Parameter = 0; !NParameters || Parameter < NParameters;
2757 ++Parameter) {
2758 SMLoc IDLoc = Lexer.getLoc();
2759 MCAsmMacroParameter FA;
2760
2761 if (Lexer.is(AsmToken::Identifier) && Lexer.peekTok().is(AsmToken::Equal)) {
2762 if (parseIdentifier(FA.Name))
2763 return Error(IDLoc, "invalid argument identifier for formal argument");
2764
2765 if (Lexer.isNot(AsmToken::Equal))
2766 return TokError("expected '=' after formal parameter identifier");
2767
2768 Lex();
2769
2770 NamedParametersFound = true;
2771 }
2772 bool Vararg = HasVararg && Parameter == (NParameters - 1);
2773
2774 if (NamedParametersFound && FA.Name.empty())
2775 return Error(IDLoc, "cannot mix positional and keyword arguments");
2776
2777 SMLoc StrLoc = Lexer.getLoc();
2778 SMLoc EndLoc;
2779 if (AltMacroMode && Lexer.is(AsmToken::Percent)) {
2780 const MCExpr *AbsoluteExp;
2781 int64_t Value;
2782 /// Eat '%'
2783 Lex();
2784 if (parseExpression(AbsoluteExp, EndLoc))
2785 return false;
2786 if (!AbsoluteExp->evaluateAsAbsolute(Value,
2787 getStreamer().getAssemblerPtr()))
2788 return Error(StrLoc, "expected absolute expression");
2789 const char *StrChar = StrLoc.getPointer();
2790 const char *EndChar = EndLoc.getPointer();
2791 AsmToken newToken(AsmToken::Integer,
2792 StringRef(StrChar, EndChar - StrChar), Value);
2793 FA.Value.push_back(newToken);
2794 } else if (AltMacroMode && Lexer.is(AsmToken::Less) &&
2795 isAngleBracketString(StrLoc, EndLoc)) {
2796 const char *StrChar = StrLoc.getPointer();
2797 const char *EndChar = EndLoc.getPointer();
2798 jumpToLoc(EndLoc, CurBuffer);
2799 /// Eat from '<' to '>'
2800 Lex();
2801 AsmToken newToken(AsmToken::String,
2802 StringRef(StrChar, EndChar - StrChar));
2803 FA.Value.push_back(newToken);
2804 } else if(parseMacroArgument(FA.Value, Vararg))
2805 return true;
2806
2807 unsigned PI = Parameter;
2808 if (!FA.Name.empty()) {
2809 unsigned FAI = 0;
2810 for (FAI = 0; FAI < NParameters; ++FAI)
2811 if (M->Parameters[FAI].Name == FA.Name)
2812 break;
2813
2814 if (FAI >= NParameters) {
2815 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~++20210621111111+acefe0eaaf82/llvm/lib/MC/MCParser/AsmParser.cpp"
, 2815, __extension__ __PRETTY_FUNCTION__))
;
2816 return Error(IDLoc, "parameter named '" + FA.Name +
2817 "' does not exist for macro '" + M->Name + "'");
2818 }
2819 PI = FAI;
2820 }
2821
2822 if (!FA.Value.empty()) {
2823 if (A.size() <= PI)
2824 A.resize(PI + 1);
2825 A[PI] = FA.Value;
2826
2827 if (FALocs.size() <= PI)
2828 FALocs.resize(PI + 1);
2829
2830 FALocs[PI] = Lexer.getLoc();
2831 }
2832
2833 // At the end of the statement, fill in remaining arguments that have
2834 // default values. If there aren't any, then the next argument is
2835 // required but missing
2836 if (Lexer.is(AsmToken::EndOfStatement)) {
2837 bool Failure = false;
2838 for (unsigned FAI = 0; FAI < NParameters; ++FAI) {
2839 if (A[FAI].empty()) {
2840 if (M->Parameters[FAI].Required) {
2841 Error(FALocs[FAI].isValid() ? FALocs[FAI] : Lexer.getLoc(),
2842 "missing value for required parameter "
2843 "'" + M->Parameters[FAI].Name + "' in macro '" + M->Name + "'");
2844 Failure = true;
2845 }
2846
2847 if (!M->Parameters[FAI].Value.empty())
2848 A[FAI] = M->Parameters[FAI].Value;
2849 }
2850 }
2851 return Failure;
2852 }
2853
2854 if (Lexer.is(AsmToken::Comma))
2855 Lex();
2856 }
2857
2858 return TokError("too many positional arguments");
2859}
2860
2861bool AsmParser::handleMacroEntry(const MCAsmMacro *M, SMLoc NameLoc) {
2862 // Arbitrarily limit macro nesting depth (default matches 'as'). We can
2863 // eliminate this, although we should protect against infinite loops.
2864 unsigned MaxNestingDepth = AsmMacroMaxNestingDepth;
2865 if (ActiveMacros.size() == MaxNestingDepth) {
2866 std::ostringstream MaxNestingDepthError;
2867 MaxNestingDepthError << "macros cannot be nested more than "
2868 << MaxNestingDepth << " levels deep."
2869 << " Use -asm-macro-max-nesting-depth to increase "
2870 "this limit.";
2871 return TokError(MaxNestingDepthError.str());
2872 }
2873
2874 MCAsmMacroArguments A;
2875 if (parseMacroArguments(M, A))
2876 return true;
2877
2878 // Macro instantiation is lexical, unfortunately. We construct a new buffer
2879 // to hold the macro body with substitutions.
2880 SmallString<256> Buf;
2881 StringRef Body = M->Body;
2882 raw_svector_ostream OS(Buf);
2883
2884 if (expandMacro(OS, Body, M->Parameters, A, true, getTok().getLoc()))
2885 return true;
2886
2887 // We include the .endmacro in the buffer as our cue to exit the macro
2888 // instantiation.
2889 OS << ".endmacro\n";
2890
2891 std::unique_ptr<MemoryBuffer> Instantiation =
2892 MemoryBuffer::getMemBufferCopy(OS.str(), "<instantiation>");
2893
2894 // Create the macro instantiation object and add to the current macro
2895 // instantiation stack.
2896 MacroInstantiation *MI = new MacroInstantiation{
2897 NameLoc, CurBuffer, getTok().getLoc(), TheCondStack.size()};
2898 ActiveMacros.push_back(MI);
2899
2900 ++NumOfMacroInstantiations;
2901
2902 // Jump to the macro instantiation and prime the lexer.
2903 CurBuffer = SrcMgr.AddNewSourceBuffer(std::move(Instantiation), SMLoc());
2904 Lexer.setBuffer(SrcMgr.getMemoryBuffer(CurBuffer)->getBuffer());
2905 Lex();
2906
2907 return false;
2908}
2909
2910void AsmParser::handleMacroExit() {
2911 // Jump to the EndOfStatement we should return to, and consume it.
2912 jumpToLoc(ActiveMacros.back()->ExitLoc, ActiveMacros.back()->ExitBuffer);
2913 Lex();
2914
2915 // Pop the instantiation entry.
2916 delete ActiveMacros.back();
2917 ActiveMacros.pop_back();
2918}
2919
2920bool AsmParser::parseAssignment(StringRef Name, bool allow_redef,
2921 bool NoDeadStrip) {
2922 MCSymbol *Sym;
2923 const MCExpr *Value;
2924 if (MCParserUtils::parseAssignmentExpression(Name, allow_redef, *this, Sym,
2925 Value))
2926 return true;
2927
2928 if (!Sym) {
2929 // In the case where we parse an expression starting with a '.', we will
2930 // not generate an error, nor will we create a symbol. In this case we
2931 // should just return out.
2932 return false;
2933 }
2934
2935 if (discardLTOSymbol(Name))
2936 return false;
2937
2938 // Do the assignment.
2939 Out.emitAssignment(Sym, Value);
2940 if (NoDeadStrip)
2941 Out.emitSymbolAttribute(Sym, MCSA_NoDeadStrip);
2942
2943 return false;
2944}
2945
2946/// parseIdentifier:
2947/// ::= identifier
2948/// ::= string
2949bool AsmParser::parseIdentifier(StringRef &Res) {
2950 // The assembler has relaxed rules for accepting identifiers, in particular we
2951 // allow things like '.globl $foo' and '.def @feat.00', which would normally be
2952 // separate tokens. At this level, we have already lexed so we cannot (currently)
2953 // handle this as a context dependent token, instead we detect adjacent tokens
2954 // and return the combined identifier.
2955 if (Lexer.is(AsmToken::Dollar) || Lexer.is(AsmToken::At)) {
2956 SMLoc PrefixLoc = getLexer().getLoc();
2957
2958 // Consume the prefix character, and check for a following identifier.
2959
2960 AsmToken Buf[1];
2961 Lexer.peekTokens(Buf, false);
2962
2963 if (Buf[0].isNot(AsmToken::Identifier) && Buf[0].isNot(AsmToken::Integer))
2964 return true;
2965
2966 // We have a '$' or '@' followed by an identifier or integer token, make
2967 // sure they are adjacent.
2968 if (PrefixLoc.getPointer() + 1 != Buf[0].getLoc().getPointer())
2969 return true;
2970
2971 // eat $ or @
2972 Lexer.Lex(); // Lexer's Lex guarantees consecutive token.
2973 // Construct the joined identifier and consume the token.
2974 Res = StringRef(PrefixLoc.getPointer(), getTok().getString().size() + 1);
2975 Lex(); // Parser Lex to maintain invariants.
2976 return false;
2977 }
2978
2979 if (Lexer.isNot(AsmToken::Identifier) && Lexer.isNot(AsmToken::String))
2980 return true;
2981
2982 Res = getTok().getIdentifier();
2983
2984 Lex(); // Consume the identifier token.
2985
2986 return false;
2987}
2988
2989/// parseDirectiveSet:
2990/// ::= .equ identifier ',' expression
2991/// ::= .equiv identifier ',' expression
2992/// ::= .set identifier ',' expression
2993bool AsmParser::parseDirectiveSet(StringRef IDVal, bool allow_redef) {
2994 StringRef Name;
2995 if (check(parseIdentifier(Name), "expected identifier") || parseComma() ||
2996 parseAssignment(Name, allow_redef, true))
2997 return true;
2998 return false;
2999}
3000
3001bool AsmParser::parseEscapedString(std::string &Data) {
3002 if (check(getTok().isNot(AsmToken::String), "expected string"))
3003 return true;
3004
3005 Data = "";
3006 StringRef Str = getTok().getStringContents();
3007 for (unsigned i = 0, e = Str.size(); i != e; ++i) {
3008 if (Str[i] != '\\') {
3009 Data += Str[i];
3010 continue;
3011 }
3012
3013 // Recognize escaped characters. Note that this escape semantics currently
3014 // loosely follows Darwin 'as'.
3015 ++i;
3016 if (i == e)
3017 return TokError("unexpected backslash at end of string");
3018
3019 // Recognize hex sequences similarly to GNU 'as'.
3020 if (Str[i] == 'x' || Str[i] == 'X') {
3021 size_t length = Str.size();
3022 if (i + 1 >= length || !isHexDigit(Str[i + 1]))
3023 return TokError("invalid hexadecimal escape sequence");
3024
3025 // Consume hex characters. GNU 'as' reads all hexadecimal characters and
3026 // then truncates to the lower 16 bits. Seems reasonable.
3027 unsigned Value = 0;
3028 while (i + 1 < length && isHexDigit(Str[i + 1]))
3029 Value = Value * 16 + hexDigitValue(Str[++i]);
3030
3031 Data += (unsigned char)(Value & 0xFF);
3032 continue;
3033 }
3034
3035 // Recognize octal sequences.
3036 if ((unsigned)(Str[i] - '0') <= 7) {
3037 // Consume up to three octal characters.
3038 unsigned Value = 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 if (i + 1 != e && ((unsigned)(Str[i + 1] - '0')) <= 7) {
3045 ++i;
3046 Value = Value * 8 + (Str[i] - '0');
3047 }
3048 }
3049
3050 if (Value > 255)
3051 return TokError("invalid octal escape sequence (out of range)");
3052
3053 Data += (unsigned char)Value;
3054 continue;
3055 }
3056
3057 // Otherwise recognize individual escapes.
3058 switch (Str[i]) {
3059 default:
3060 // Just reject invalid escape sequences for now.
3061 return TokError("invalid escape sequence (unrecognized character)");
3062
3063 case 'b': Data += '\b'; break;
3064 case 'f': Data += '\f'; break;
3065 case 'n': Data += '\n'; break;
3066 case 'r': Data += '\r'; break;
3067 case 't': Data += '\t'; break;
3068 case '"': Data += '"'; break;
3069 case '\\': Data += '\\'; break;
3070 }
3071 }
3072
3073 Lex();
3074 return false;
3075}
3076
3077bool AsmParser::parseAngleBracketString(std::string &Data) {
3078 SMLoc EndLoc, StartLoc = getTok().getLoc();
3079 if (isAngleBracketString(StartLoc, EndLoc)) {
3080 const char *StartChar = StartLoc.getPointer() + 1;
3081 const char *EndChar = EndLoc.getPointer() - 1;
3082 jumpToLoc(EndLoc, CurBuffer);
3083 /// Eat from '<' to '>'
3084 Lex();
3085
3086 Data = angleBracketString(StringRef(StartChar, EndChar - StartChar));
3087 return false;
3088 }
3089 return true;
3090}
3091
3092/// parseDirectiveAscii:
3093// ::= .ascii [ "string"+ ( , "string"+ )* ]
3094/// ::= ( .asciz | .string ) [ "string" ( , "string" )* ]
3095bool AsmParser::parseDirectiveAscii(StringRef IDVal, bool ZeroTerminated) {
3096 auto parseOp = [&]() -> bool {
3097 std::string Data;
3098 if (checkForValidSection())
3099 return true;
3100 // Only support spaces as separators for .ascii directive for now. See the
3101 // discusssion at https://reviews.llvm.org/D91460 for more details.
3102 do {
3103 if (parseEscapedString(Data))
3104 return true;
3105 getStreamer().emitBytes(Data);
3106 } while (!ZeroTerminated && getTok().is(AsmToken::String));
3107 if (ZeroTerminated)
3108 getStreamer().emitBytes(StringRef("\0", 1));
3109 return false;
3110 };
3111
3112 return parseMany(parseOp);
3113}
3114
3115/// parseDirectiveReloc
3116/// ::= .reloc expression , identifier [ , expression ]
3117bool AsmParser::parseDirectiveReloc(SMLoc DirectiveLoc) {
3118 const MCExpr *Offset;
3119 const MCExpr *Expr = nullptr;
3120 SMLoc OffsetLoc = Lexer.getTok().getLoc();
3121
3122 if (parseExpression(Offset))
3123 return true;
3124 if (parseComma() ||
3125 check(getTok().isNot(AsmToken::Identifier), "expected relocation name"))
3126 return true;
3127
3128 SMLoc NameLoc = Lexer.getTok().getLoc();
3129 StringRef Name = Lexer.getTok().getIdentifier();
3130 Lex();
3131
3132 if (Lexer.is(AsmToken::Comma)) {
3133 Lex();
3134 SMLoc ExprLoc = Lexer.getLoc();
3135 if (parseExpression(Expr))
3136 return true;
3137
3138 MCValue Value;
3139 if (!Expr->evaluateAsRelocatable(Value, nullptr, nullptr))
3140 return Error(ExprLoc, "expression must be relocatable");
3141 }
3142
3143 if (parseEOL())
3144 return true;
3145
3146 const MCTargetAsmParser &MCT = getTargetParser();
3147 const MCSubtargetInfo &STI = MCT.getSTI();
3148 if (Optional<std::pair<bool, std::string>> Err =
3149 getStreamer().emitRelocDirective(*Offset, Name, Expr, DirectiveLoc,
3150 STI))
3151 return Error(Err->first ? NameLoc : OffsetLoc, Err->second);
3152
3153 return false;
3154}
3155
3156/// parseDirectiveValue
3157/// ::= (.byte | .short | ... ) [ expression (, expression)* ]
3158bool AsmParser::parseDirectiveValue(StringRef IDVal, unsigned Size) {
3159 auto parseOp = [&]() -> bool {
3160 const MCExpr *Value;
3161 SMLoc ExprLoc = getLexer().getLoc();
3162 if (checkForValidSection() || parseExpression(Value))
3163 return true;
3164 // Special case constant expressions to match code generator.
3165 if (const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Value)) {
3166 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~++20210621111111+acefe0eaaf82/llvm/lib/MC/MCParser/AsmParser.cpp"
, 3166, __extension__ __PRETTY_FUNCTION__))
;
3167 uint64_t IntValue = MCE->getValue();
3168 if (!isUIntN(8 * Size, IntValue) && !isIntN(8 * Size, IntValue))
3169 return Error(ExprLoc, "out of range literal value");
3170 getStreamer().emitIntValue(IntValue, Size);
3171 } else
3172 getStreamer().emitValue(Value, Size, ExprLoc);
3173 return false;
3174 };
3175
3176 return parseMany(parseOp);
3177}
3178
3179static bool parseHexOcta(AsmParser &Asm, uint64_t &hi, uint64_t &lo) {
3180 if (Asm.getTok().isNot(AsmToken::Integer) &&
3181 Asm.getTok().isNot(AsmToken::BigNum))
3182 return Asm.TokError("unknown token in expression");
3183 SMLoc ExprLoc = Asm.getTok().getLoc();
3184 APInt IntValue = Asm.getTok().getAPIntVal();
3185 Asm.Lex();
3186 if (!IntValue.isIntN(128))
3187 return Asm.Error(ExprLoc, "out of range literal value");
3188 if (!IntValue.isIntN(64)) {
3189 hi = IntValue.getHiBits(IntValue.getBitWidth() - 64).getZExtValue();
3190 lo = IntValue.getLoBits(64).getZExtValue();
3191 } else {
3192 hi = 0;
3193 lo = IntValue.getZExtValue();
3194 }
3195 return false;
3196}
3197
3198/// ParseDirectiveOctaValue
3199/// ::= .octa [ hexconstant (, hexconstant)* ]
3200
3201bool AsmParser::parseDirectiveOctaValue(StringRef IDVal) {
3202 auto parseOp = [&]() -> bool {
3203 if (checkForValidSection())
3204 return true;
3205 uint64_t hi, lo;
3206 if (parseHexOcta(*this, hi, lo))
3207 return true;
3208 if (MAI.isLittleEndian()) {
3209 getStreamer().emitInt64(lo);
3210 getStreamer().emitInt64(hi);
3211 } else {
3212 getStreamer().emitInt64(hi);
3213 getStreamer().emitInt64(lo);
3214 }
3215 return false;
3216 };
3217
3218 return parseMany(parseOp);
3219}
3220
3221bool AsmParser::parseRealValue(const fltSemantics &Semantics, APInt &Res) {
3222 // We don't truly support arithmetic on floating point expressions, so we
3223 // have to manually parse unary prefixes.
3224 bool IsNeg = false;
3225 if (getLexer().is(AsmToken::Minus)) {
3226 Lexer.Lex();
3227 IsNeg = true;
3228 } else if (getLexer().is(AsmToken::Plus))
3229 Lexer.Lex();
3230
3231 if (Lexer.is(AsmToken::Error))
3232 return TokError(Lexer.getErr());
3233 if (Lexer.isNot(AsmToken::Integer) && Lexer.isNot(AsmToken::Real) &&
3234 Lexer.isNot(AsmToken::Identifier))
3235 return TokError("unexpected token in directive");
3236
3237 // Convert to an APFloat.
3238 APFloat Value(Semantics);
3239 StringRef IDVal = getTok().getString();
3240 if (getLexer().is(AsmToken::Identifier)) {
3241 if (!IDVal.compare_lower("infinity") || !IDVal.compare_lower("inf"))
3242 Value = APFloat::getInf(Semantics);
3243 else if (!IDVal.compare_lower("nan"))
3244 Value = APFloat::getNaN(Semantics, false, ~0);
3245 else
3246 return TokError("invalid floating point literal");
3247 } else if (errorToBool(
3248 Value.convertFromString(IDVal, APFloat::rmNearestTiesToEven)
3249 .takeError()))
3250 return TokError("invalid floating point literal");
3251 if (IsNeg)
3252 Value.changeSign();
3253
3254 // Consume the numeric token.
3255 Lex();
3256
3257 Res = Value.bitcastToAPInt();
3258
3259 return false;
3260}
3261
3262/// parseDirectiveRealValue
3263/// ::= (.single | .double) [ expression (, expression)* ]
3264bool AsmParser::parseDirectiveRealValue(StringRef IDVal,
3265 const fltSemantics &Semantics) {
3266 auto parseOp = [&]() -> bool {
3267 APInt AsInt;
3268 if (checkForValidSection() || parseRealValue(Semantics, AsInt))
3269 return true;
3270 getStreamer().emitIntValue(AsInt.getLimitedValue(),
3271 AsInt.getBitWidth() / 8);
3272 return false;
3273 };
3274
3275 return parseMany(parseOp);
3276}
3277
3278/// parseDirectiveZero
3279/// ::= .zero expression
3280bool AsmParser::parseDirectiveZero() {
3281 SMLoc NumBytesLoc = Lexer.getLoc();
3282 const MCExpr *NumBytes;
3283 if (checkForValidSection() || parseExpression(NumBytes))
3284 return true;
3285
3286 int64_t Val = 0;
3287 if (getLexer().is(AsmToken::Comma)) {
3288 Lex();
3289 if (parseAbsoluteExpression(Val))
3290 return true;
3291 }
3292
3293 if (parseEOL())
3294 return true;
3295 getStreamer().emitFill(*NumBytes, Val, NumBytesLoc);
3296
3297 return false;
3298}
3299
3300/// parseDirectiveFill
3301/// ::= .fill expression [ , expression [ , expression ] ]
3302bool AsmParser::parseDirectiveFill() {
3303 SMLoc NumValuesLoc = Lexer.getLoc();
3304 const MCExpr *NumValues;
3305 if (checkForValidSection() || parseExpression(NumValues))
3306 return true;
3307
3308 int64_t FillSize = 1;
3309 int64_t FillExpr = 0;
3310
3311 SMLoc SizeLoc, ExprLoc;
3312
3313 if (parseOptionalToken(AsmToken::Comma)) {
3314 SizeLoc = getTok().getLoc();
3315 if (parseAbsoluteExpression(FillSize))
3316 return true;
3317 if (parseOptionalToken(AsmToken::Comma)) {
3318 ExprLoc = getTok().getLoc();
3319 if (parseAbsoluteExpression(FillExpr))
3320 return true;
3321 }
3322 }
3323 if (parseEOL())
3324 return true;
3325
3326 if (FillSize < 0) {
3327 Warning(SizeLoc, "'.fill' directive with negative size has no effect");
3328 return false;
3329 }
3330 if (FillSize > 8) {
3331 Warning(SizeLoc, "'.fill' directive with size greater than 8 has been truncated to 8");
3332 FillSize = 8;
3333 }
3334
3335 if (!isUInt<32>(FillExpr) && FillSize > 4)
3336 Warning(ExprLoc, "'.fill' directive pattern has been truncated to 32-bits");
3337
3338 getStreamer().emitFill(*NumValues, FillSize, FillExpr, NumValuesLoc);
3339
3340 return false;
3341}
3342
3343/// parseDirectiveOrg
3344/// ::= .org expression [ , expression ]
3345bool AsmParser::parseDirectiveOrg() {
3346 const MCExpr *Offset;
3347 SMLoc OffsetLoc = Lexer.getLoc();
3348 if (checkForValidSection() || parseExpression(Offset))
3349 return true;
3350
3351 // Parse optional fill expression.
3352 int64_t FillExpr = 0;
3353 if (parseOptionalToken(AsmToken::Comma))
3354 if (parseAbsoluteExpression(FillExpr))
3355 return true;
3356 if (parseEOL())
3357 return true;
3358
3359 getStreamer().emitValueToOffset(Offset, FillExpr, OffsetLoc);
3360 return false;
3361}
3362
3363/// parseDirectiveAlign
3364/// ::= {.align, ...} expression [ , expression [ , expression ]]
3365bool AsmParser::parseDirectiveAlign(bool IsPow2, unsigned ValueSize) {
3366 SMLoc AlignmentLoc = getLexer().getLoc();
3367 int64_t Alignment;
3368 SMLoc MaxBytesLoc;
3369 bool HasFillExpr = false;
3370 int64_t FillExpr = 0;
3371 int64_t MaxBytesToFill = 0;
3372
3373 auto parseAlign = [&]() -> bool {
3374 if (parseAbsoluteExpression(Alignment))
3375 return true;
3376 if (parseOptionalToken(AsmToken::Comma)) {
3377 // The fill expression can be omitted while specifying a maximum number of
3378 // alignment bytes, e.g:
3379 // .align 3,,4
3380 if (getTok().isNot(AsmToken::Comma)) {
3381 HasFillExpr = true;
3382 if (parseAbsoluteExpression(FillExpr))
3383 return true;
3384 }
3385 if (parseOptionalToken(AsmToken::Comma))
3386 if (parseTokenLoc(MaxBytesLoc) ||
3387 parseAbsoluteExpression(MaxBytesToFill))
3388 return true;
3389 }
3390 return parseEOL();
3391 };
3392
3393 if (checkForValidSection())
3394 return true;
3395 // Ignore empty '.p2align' directives for GNU-as compatibility
3396 if (IsPow2 && (ValueSize == 1) && getTok().is(AsmToken::EndOfStatement)) {
3397 Warning(AlignmentLoc, "p2align directive with no operand(s) is ignored");
3398 return parseEOL();
3399 }
3400 if (parseAlign())
3401 return true;
3402
3403 // Always emit an alignment here even if we thrown an error.
3404 bool ReturnVal = false;
3405
3406 // Compute alignment in bytes.
3407 if (IsPow2) {
3408 // FIXME: Diagnose overflow.
3409 if (Alignment >= 32) {
3410 ReturnVal |= Error(AlignmentLoc, "invalid alignment value");
3411 Alignment = 31;
3412 }
3413
3414 Alignment = 1ULL << Alignment;
3415 } else {
3416 // Reject alignments that aren't either a power of two or zero,
3417 // for gas compatibility. Alignment of zero is silently rounded
3418 // up to one.
3419 if (Alignment == 0)
3420 Alignment = 1;
3421 if (!isPowerOf2_64(Alignment))
3422 ReturnVal |= Error(AlignmentLoc, "alignment must be a power of 2");
3423 if (!isUInt<32>(Alignment))
3424 ReturnVal |= Error(AlignmentLoc, "alignment must be smaller than 2**32");
3425 }
3426
3427 // Diagnose non-sensical max bytes to align.
3428 if (MaxBytesLoc.isValid()) {
3429 if (MaxBytesToFill < 1) {
3430 ReturnVal |= Error(MaxBytesLoc,
3431 "alignment directive can never be satisfied in this "
3432 "many bytes, ignoring maximum bytes expression");
3433 MaxBytesToFill = 0;
3434 }
3435
3436 if (MaxBytesToFill >= Alignment) {
3437 Warning(MaxBytesLoc, "maximum bytes expression exceeds alignment and "
3438 "has no effect");
3439 MaxBytesToFill = 0;
3440 }
3441 }
3442
3443 // Check whether we should use optimal code alignment for this .align
3444 // directive.
3445 const MCSection *Section = getStreamer().getCurrentSectionOnly();
3446 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~++20210621111111+acefe0eaaf82/llvm/lib/MC/MCParser/AsmParser.cpp"
, 3446, __extension__ __PRETTY_FUNCTION__))
;
3447 bool UseCodeAlign = Section->UseCodeAlign();
3448 if ((!HasFillExpr || Lexer.getMAI().getTextAlignFillValue() == FillExpr) &&
3449 ValueSize == 1 && UseCodeAlign) {
3450 getStreamer().emitCodeAlignment(Alignment, MaxBytesToFill);
3451 } else {
3452 // FIXME: Target specific behavior about how the "extra" bytes are filled.
3453 getStreamer().emitValueToAlignment(Alignment, FillExpr, ValueSize,
3454 MaxBytesToFill);
3455 }
3456
3457 return ReturnVal;
3458}
3459
3460/// parseDirectiveFile
3461/// ::= .file filename
3462/// ::= .file number [directory] filename [md5 checksum] [source source-text]
3463bool AsmParser::parseDirectiveFile(SMLoc DirectiveLoc) {
3464 // FIXME: I'm not sure what this is.
3465 int64_t FileNumber = -1;
3466 if (getLexer().is(AsmToken::Integer)) {
3467 FileNumber = getTok().getIntVal();
3468 Lex();
3469
3470 if (FileNumber < 0)
3471 return TokError("negative file number");
3472 }
3473
3474 std::string Path;
3475
3476 // Usually the directory and filename together, otherwise just the directory.
3477 // Allow the strings to have escaped octal character sequence.
3478 if (parseEscapedString(Path))
3479 return true;
3480
3481 StringRef Directory;
3482 StringRef Filename;
3483 std::string FilenameData;
3484 if (getLexer().is(AsmToken::String)) {
3485 if (check(FileNumber == -1,
3486 "explicit path specified, but no file number") ||
3487 parseEscapedString(FilenameData))
3488 return true;
3489 Filename = FilenameData;
3490 Directory = Path;
3491 } else {
3492 Filename = Path;
3493 }
3494
3495 uint64_t MD5Hi, MD5Lo;
3496 bool HasMD5 = false;
3497
3498 Optional<StringRef> Source;
3499 bool HasSource = false;
3500 std::string SourceString;
3501
3502 while (!parseOptionalToken(AsmToken::EndOfStatement)) {
3503 StringRef Keyword;
3504 if (check(getTok().isNot(AsmToken::Identifier),
3505 "unexpected token in '.file' directive") ||
3506 parseIdentifier(Keyword))
3507 return true;
3508 if (Keyword == "md5") {
3509 HasMD5 = true;
3510 if (check(FileNumber == -1,
3511 "MD5 checksum specified, but no file number") ||
3512 parseHexOcta(*this, MD5Hi, MD5Lo))
3513 return true;
3514 } else if (Keyword == "source") {
3515 HasSource = true;
3516 if (check(FileNumber == -1,
3517 "source specified, but no file number") ||
3518 check(getTok().isNot(AsmToken::String),
3519 "unexpected token in '.file' directive") ||
3520 parseEscapedString(SourceString))
3521 return true;
3522 } else {
3523 return TokError("unexpected token in '.file' directive");
3524 }
3525 }
3526
3527 if (FileNumber == -1) {
3528 // Ignore the directive if there is no number and the target doesn't support
3529 // numberless .file directives. This allows some portability of assembler
3530 // between different object file formats.
3531 if (getContext().getAsmInfo()->hasSingleParameterDotFile())
3532 getStreamer().emitFileDirective(Filename);
3533 } else {
3534 // In case there is a -g option as well as debug info from directive .file,
3535 // we turn off the -g option, directly use the existing debug info instead.
3536 // Throw away any implicit file table for the assembler source.
3537 if (Ctx.getGenDwarfForAssembly()) {
3538 Ctx.getMCDwarfLineTable(0).resetFileTable();
3539 Ctx.setGenDwarfForAssembly(false);
3540 }
3541
3542 Optional<MD5::MD5Result> CKMem;
3543 if (HasMD5) {
3544 MD5::MD5Result Sum;
3545 for (unsigned i = 0; i != 8; ++i) {
3546 Sum.Bytes[i] = uint8_t(MD5Hi >> ((7 - i) * 8));
3547 Sum.Bytes[i + 8] = uint8_t(MD5Lo >> ((7 - i) * 8));
3548 }
3549 CKMem = Sum;
3550 }
3551 if (HasSource) {
3552 char *SourceBuf = static_cast<char *>(Ctx.allocate(SourceString.size()));
3553 memcpy(SourceBuf, SourceString.data(), SourceString.size());
3554 Source = StringRef(SourceBuf, SourceString.size());
3555 }
3556 if (FileNumber == 0) {
3557 // Upgrade to Version 5 for assembly actions like clang -c a.s.
3558 if (Ctx.getDwarfVersion() < 5)
3559 Ctx.setDwarfVersion(5);
3560 getStreamer().emitDwarfFile0Directive(Directory, Filename, CKMem, Source);
3561 } else {
3562 Expected<unsigned> FileNumOrErr = getStreamer().tryEmitDwarfFileDirective(
3563 FileNumber, Directory, Filename, CKMem, Source);
3564 if (!FileNumOrErr)
3565 return Error(DirectiveLoc, toString(FileNumOrErr.takeError()));
3566 }
3567 // Alert the user if there are some .file directives with MD5 and some not.
3568 // But only do that once.
3569 if (!ReportedInconsistentMD5 && !Ctx.isDwarfMD5UsageConsistent(0)) {
3570 ReportedInconsistentMD5 = true;
3571 return Warning(DirectiveLoc, "inconsistent use of MD5 checksums");
3572 }
3573 }
3574
3575 return false;
3576}
3577
3578/// parseDirectiveLine
3579/// ::= .line [number]
3580bool AsmParser::parseDirectiveLine() {
3581 int64_t LineNumber;
3582 if (getLexer().is(AsmToken::Integer)) {
3583 if (parseIntToken(LineNumber, "unexpected token in '.line' directive"))
3584 return true;
3585 (void)LineNumber;
3586 // FIXME: Do something with the .line.
3587 }
3588 return parseEOL();
3589}
3590
3591/// parseDirectiveLoc
3592/// ::= .loc FileNumber [LineNumber] [ColumnPos] [basic_block] [prologue_end]
3593/// [epilogue_begin] [is_stmt VALUE] [isa VALUE]
3594/// The first number is a file number, must have been previously assigned with
3595/// a .file directive, the second number is the line number and optionally the
3596/// third number is a column position (zero if not specified). The remaining
3597/// optional items are .loc sub-directives.
3598bool AsmParser::parseDirectiveLoc() {
3599 int64_t FileNumber = 0, LineNumber = 0;
3600 SMLoc Loc = getTok().getLoc();
3601 if (parseIntToken(FileNumber, "unexpected token in '.loc' directive") ||
3602 check(FileNumber < 1 && Ctx.getDwarfVersion() < 5, Loc,
3603 "file number less than one in '.loc' directive") ||
3604 check(!getContext().isValidDwarfFileNumber(FileNumber), Loc,
3605 "unassigned file number in '.loc' directive"))
3606 return true;
3607
3608 // optional
3609 if (getLexer().is(AsmToken::Integer)) {
3610 LineNumber = getTok().getIntVal();
3611 if (LineNumber < 0)
3612 return TokError("line number less than zero in '.loc' directive");
3613 Lex();
3614 }
3615
3616 int64_t ColumnPos = 0;
3617 if (getLexer().is(AsmToken::Integer)) {
3618 ColumnPos = getTok().getIntVal();
3619 if (ColumnPos < 0)
3620 return TokError("column position less than zero in '.loc' directive");
3621 Lex();
3622 }
3623
3624 auto PrevFlags = getContext().getCurrentDwarfLoc().getFlags();
3625 unsigned Flags = PrevFlags & DWARF2_FLAG_IS_STMT(1 << 0);
3626 unsigned Isa = 0;
3627 int64_t Discriminator = 0;
3628
3629 auto parseLocOp = [&]() -> bool {
3630 StringRef Name;
3631 SMLoc Loc = getTok().getLoc();
3632 if (parseIdentifier(Name))
3633 return TokError("unexpected token in '.loc' directive");
3634
3635 if (Name == "basic_block")
3636 Flags |= DWARF2_FLAG_BASIC_BLOCK(1 << 1);
3637 else if (Name == "prologue_end")
3638 Flags |= DWARF2_FLAG_PROLOGUE_END(1 << 2);
3639 else if (Name == "epilogue_begin")
3640 Flags |= DWARF2_FLAG_EPILOGUE_BEGIN(1 << 3);
3641 else if (Name == "is_stmt") {
3642 Loc = getTok().getLoc();
3643 const MCExpr *Value;
3644 if (parseExpression(Value))
3645 return true;
3646 // The expression must be the constant 0 or 1.
3647 if (const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Value)) {
3648 int Value = MCE->getValue();
3649 if (Value == 0)
3650 Flags &= ~DWARF2_FLAG_IS_STMT(1 << 0);
3651 else if (Value == 1)
3652 Flags |= DWARF2_FLAG_IS_STMT(1 << 0);
3653 else
3654 return Error(Loc, "is_stmt value not 0 or 1");
3655 } else {
3656 return Error(Loc, "is_stmt value not the constant value of 0 or 1");
3657 }
3658 } else if (Name == "isa") {
3659 Loc = getTok().getLoc();
3660 const MCExpr *Value;
3661 if (parseExpression(Value))
3662 return true;
3663 // The expression must be a constant greater or equal to 0.
3664 if (const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Value)) {
3665 int Value = MCE->getValue();
3666 if (Value < 0)
3667 return Error(Loc, "isa number less than zero");
3668 Isa = Value;
3669 } else {
3670 return Error(Loc, "isa number not a constant value");
3671 }
3672 } else if (Name == "discriminator") {
3673 if (parseAbsoluteExpression(Discriminator))
3674 return true;
3675 } else {
3676 return Error(Loc, "unknown sub-directive in '.loc' directive");
3677 }
3678 return false;
3679 };
3680
3681 if (parseMany(parseLocOp, false /*hasComma*/))
3682 return true;
3683
3684 getStreamer().emitDwarfLocDirective(FileNumber, LineNumber, ColumnPos, Flags,
3685 Isa, Discriminator, StringRef());
3686
3687 return false;
3688}
3689
3690/// parseDirectiveStabs
3691/// ::= .stabs string, number, number, number
3692bool AsmParser::parseDirectiveStabs() {
3693 return TokError("unsupported directive '.stabs'");
3694}
3695
3696/// parseDirectiveCVFile
3697/// ::= .cv_file number filename [checksum] [checksumkind]
3698bool AsmParser::parseDirectiveCVFile() {
3699 SMLoc FileNumberLoc = getTok().getLoc();
3700 int64_t FileNumber;
3701 std::string Filename;
3702 std::string Checksum;
3703 int64_t ChecksumKind = 0;
3704
3705 if (parseIntToken(FileNumber,
3706 "expected file number in '.cv_file' directive") ||
3707 check(FileNumber < 1, FileNumberLoc, "file number less than one") ||
3708 check(getTok().isNot(AsmToken::String),
3709 "unexpected token in '.cv_file' directive") ||
3710 parseEscapedString(Filename))
3711 return true;
3712 if (!parseOptionalToken(AsmToken::EndOfStatement)) {
3713 if (check(getTok().isNot(AsmToken::String),
3714 "unexpected token in '.cv_file' directive") ||
3715 parseEscapedString(Checksum) ||
3716 parseIntToken(ChecksumKind,
3717 "expected checksum kind in '.cv_file' directive") ||
3718 parseToken(AsmToken::EndOfStatement,
3719 "unexpected token in '.cv_file' directive"))
3720 return true;
3721 }
3722
3723 Checksum = fromHex(Checksum);
3724 void *CKMem = Ctx.allocate(Checksum.size(), 1);
3725 memcpy(CKMem, Checksum.data(), Checksum.size());
3726 ArrayRef<uint8_t> ChecksumAsBytes(reinterpret_cast<const uint8_t *>(CKMem),
3727 Checksum.size());
3728
3729 if (!getStreamer().EmitCVFileDirective(FileNumber, Filename, ChecksumAsBytes,
3730 static_cast<uint8_t>(ChecksumKind)))
3731 return Error(FileNumberLoc, "file number already allocated");
3732
3733 return false;
3734}
3735
3736bool AsmParser::parseCVFunctionId(int64_t &FunctionId,
3737 StringRef DirectiveName) {
3738 SMLoc Loc;
3739 return parseTokenLoc(Loc) ||
3740 parseIntToken(FunctionId, "expected function id in '" + DirectiveName +
3741 "' directive") ||
3742 check(FunctionId < 0 || FunctionId >= UINT_MAX(2147483647 *2U +1U), Loc,
3743 "expected function id within range [0, UINT_MAX)");
3744}
3745
3746bool AsmParser::parseCVFileId(int64_t &FileNumber, StringRef DirectiveName) {
3747 SMLoc Loc;
3748 return parseTokenLoc(Loc) ||
3749 parseIntToken(FileNumber, "expected integer in '" + DirectiveName +
3750 "' directive") ||
3751 check(FileNumber < 1, Loc, "file number less than one in '" +
3752 DirectiveName + "' directive") ||
3753 check(!getCVContext().isValidFileNumber(FileNumber), Loc,
3754 "unassigned file number in '" + DirectiveName + "' directive");
3755}
3756
3757/// parseDirectiveCVFuncId
3758/// ::= .cv_func_id FunctionId
3759///
3760/// Introduces a function ID that can be used with .cv_loc.
3761bool AsmParser::parseDirectiveCVFuncId() {
3762 SMLoc FunctionIdLoc = getTok().getLoc();
3763 int64_t FunctionId;
3764
3765 if (parseCVFunctionId(FunctionId, ".cv_func_id") ||
3766 parseToken(AsmToken::EndOfStatement,
3767 "unexpected token in '.cv_func_id' directive"))
3768 return true;
3769
3770 if (!getStreamer().EmitCVFuncIdDirective(FunctionId))
3771 return Error(FunctionIdLoc, "function id already allocated");
3772
3773 return false;
3774}
3775
3776/// parseDirectiveCVInlineSiteId
3777/// ::= .cv_inline_site_id FunctionId
3778/// "within" IAFunc
3779/// "inlined_at" IAFile IALine [IACol]
3780///
3781/// Introduces a function ID that can be used with .cv_loc. Includes "inlined
3782/// at" source location information for use in the line table of the caller,
3783/// whether the caller is a real function or another inlined call site.
3784bool AsmParser::parseDirectiveCVInlineSiteId() {
3785 SMLoc FunctionIdLoc = getTok().getLoc();
3786 int64_t FunctionId;
3787 int64_t IAFunc;
3788 int64_t IAFile;
3789 int64_t IALine;
3790 int64_t IACol = 0;
3791
3792 // FunctionId
3793 if (parseCVFunctionId(FunctionId, ".cv_inline_site_id"))
3794 return true;
3795
3796 // "within"
3797 if (check((getLexer().isNot(AsmToken::Identifier) ||
3798 getTok().getIdentifier() != "within"),
3799 "expected 'within' identifier in '.cv_inline_site_id' directive"))
3800 return true;
3801 Lex();
3802
3803 // IAFunc
3804 if (parseCVFunctionId(IAFunc, ".cv_inline_site_id"))
3805 return true;
3806
3807 // "inlined_at"
3808 if (check((getLexer().isNot(AsmToken::Identifier) ||
3809 getTok().getIdentifier() != "inlined_at"),
3810 "expected 'inlined_at' identifier in '.cv_inline_site_id' "
3811 "directive") )
3812 return true;
3813 Lex();
3814
3815 // IAFile IALine
3816 if (parseCVFileId(IAFile, ".cv_inline_site_id") ||
3817 parseIntToken(IALine, "expected line number after 'inlined_at'"))
3818 return true;
3819
3820 // [IACol]
3821 if (getLexer().is(AsmToken::Integer)) {
3822 IACol = getTok().getIntVal();
3823 Lex();
3824 }
3825
3826 if (parseToken(AsmToken::EndOfStatement,
3827 "unexpected token in '.cv_inline_site_id' directive"))
3828 return true;
3829
3830 if (!getStreamer().EmitCVInlineSiteIdDirective(FunctionId, IAFunc, IAFile,
3831 IALine, IACol, FunctionIdLoc))
3832 return Error(FunctionIdLoc, "function id already allocated");
3833
3834 return false;
3835}
3836
3837/// parseDirectiveCVLoc
3838/// ::= .cv_loc FunctionId FileNumber [LineNumber] [ColumnPos] [prologue_end]
3839/// [is_stmt VALUE]
3840/// The first number is a file number, must have been previously assigned with
3841/// a .file directive, the second number is the line number and optionally the
3842/// third number is a column position (zero if not specified). The remaining
3843/// optional items are .loc sub-directives.
3844bool AsmParser::parseDirectiveCVLoc() {
3845 SMLoc DirectiveLoc = getTok().getLoc();
3846 int64_t FunctionId, FileNumber;
3847 if (parseCVFunctionId(FunctionId, ".cv_loc") ||
3848 parseCVFileId(FileNumber, ".cv_loc"))
3849 return true;
3850
3851 int64_t LineNumber = 0;
3852 if (getLexer().is(AsmToken::Integer)) {
3853 LineNumber = getTok().getIntVal();
3854 if (LineNumber < 0)
3855 return TokError("line number less than zero in '.cv_loc' directive");
3856 Lex();
3857 }
3858
3859 int64_t ColumnPos = 0;
3860 if (getLexer().is(AsmToken::Integer)) {
3861 ColumnPos = getTok().getIntVal();
3862 if (ColumnPos < 0)
3863 return TokError("column position less than zero in '.cv_loc' directive");
3864 Lex();
3865 }
3866
3867 bool PrologueEnd = false;
3868 uint64_t IsStmt = 0;
3869
3870 auto parseOp = [&]() -> bool {
3871 StringRef Name;
3872 SMLoc Loc = getTok().getLoc();
3873 if (parseIdentifier(Name))
3874 return TokError("unexpected token in '.cv_loc' directive");
3875 if (Name == "prologue_end")
3876 PrologueEnd = true;
3877 else if (Name == "is_stmt") {
3878 Loc = getTok().getLoc();
3879 const MCExpr *Value;
3880 if (parseExpression(Value))
3881 return true;
3882 // The expression must be the constant 0 or 1.
3883 IsStmt = ~0ULL;
3884 if (const auto *MCE = dyn_cast<MCConstantExpr>(Value))
3885 IsStmt = MCE->getValue();
3886
3887 if (IsStmt > 1)
3888 return Error(Loc, "is_stmt value not 0 or 1");
3889 } else {
3890 return Error(Loc, "unknown sub-directive in '.cv_loc' directive");
3891 }
3892 return false;
3893 };
3894
3895 if (parseMany(parseOp, false /*hasComma*/))
3896 return true;
3897
3898 getStreamer().emitCVLocDirective(FunctionId, FileNumber, LineNumber,
3899 ColumnPos, PrologueEnd, IsStmt, StringRef(),
3900 DirectiveLoc);
3901 return false;
3902}
3903
3904/// parseDirectiveCVLinetable
3905/// ::= .cv_linetable FunctionId, FnStart, FnEnd
3906bool AsmParser::parseDirectiveCVLinetable() {
3907 int64_t FunctionId;
3908 StringRef FnStartName, FnEndName;
3909 SMLoc Loc = getTok().getLoc();
3910 if (parseCVFunctionId(FunctionId, ".cv_linetable") || parseComma() ||
3911 parseTokenLoc(Loc) ||
3912 check(parseIdentifier(FnStartName), Loc,
3913 "expected identifier in directive") ||
3914 parseComma() || parseTokenLoc(Loc) ||
3915 check(parseIdentifier(FnEndName), Loc,
3916 "expected identifier in directive"))
3917 return true;
3918
3919 MCSymbol *FnStartSym = getContext().getOrCreateSymbol(FnStartName);
3920 MCSymbol *FnEndSym = getContext().getOrCreateSymbol(FnEndName);
3921
3922 getStreamer().emitCVLinetableDirective(FunctionId, FnStartSym, FnEndSym);
3923 return false;
3924}
3925
3926/// parseDirectiveCVInlineLinetable
3927/// ::= .cv_inline_linetable PrimaryFunctionId FileId LineNum FnStart FnEnd
3928bool AsmParser::parseDirectiveCVInlineLinetable() {
3929 int64_t PrimaryFunctionId, SourceFileId, SourceLineNum;
3930 StringRef FnStartName, FnEndName;
3931 SMLoc Loc = getTok().getLoc();
3932 if (parseCVFunctionId(PrimaryFunctionId, ".cv_inline_linetable") ||
3933 parseTokenLoc(Loc) ||
3934 parseIntToken(
3935 SourceFileId,
3936 "expected SourceField in '.cv_inline_linetable' directive") ||
3937 check(SourceFileId <= 0, Loc,
3938 "File id less than zero in '.cv_inline_linetable' directive") ||
3939 parseTokenLoc(Loc) ||
3940 parseIntToken(
3941 SourceLineNum,
3942 "expected SourceLineNum in '.cv_inline_linetable' directive") ||
3943 check(SourceLineNum < 0, Loc,
3944 "Line number less than zero in '.cv_inline_linetable' directive") ||
3945 parseTokenLoc(Loc) || check(parseIdentifier(FnStartName), Loc,
3946 "expected identifier in directive") ||
3947 parseTokenLoc(Loc) || check(parseIdentifier(FnEndName), Loc,
3948 "expected identifier in directive"))
3949 return true;
3950
3951 if (parseToken(AsmToken::EndOfStatement, "Expected End of Statement"))
3952 return true;
3953
3954 MCSymbol *FnStartSym = getContext().getOrCreateSymbol(FnStartName);
3955 MCSymbol *FnEndSym = getContext().getOrCreateSymbol(FnEndName);
3956 getStreamer().emitCVInlineLinetableDirective(PrimaryFunctionId, SourceFileId,
3957 SourceLineNum, FnStartSym,
3958 FnEndSym);
3959 return false;
3960}
3961
3962void AsmParser::initializeCVDefRangeTypeMap() {
3963 CVDefRangeTypeMap["reg"] = CVDR_DEFRANGE_REGISTER;
3964 CVDefRangeTypeMap["frame_ptr_rel"] = CVDR_DEFRANGE_FRAMEPOINTER_REL;
3965 CVDefRangeTypeMap["subfield_reg"] = CVDR_DEFRANGE_SUBFIELD_REGISTER;
3966 CVDefRangeTypeMap["reg_rel"] = CVDR_DEFRANGE_REGISTER_REL;
3967}
3968
3969/// parseDirectiveCVDefRange
3970/// ::= .cv_def_range RangeStart RangeEnd (GapStart GapEnd)*, bytes*
3971bool AsmParser::parseDirectiveCVDefRange() {
3972 SMLoc Loc;
3973 std::vector<std::pair<const MCSymbol *, const MCSymbol *>> Ranges;
3974 while (getLexer().is(AsmToken::Identifier)) {
3975 Loc = getLexer().getLoc();
3976 StringRef GapStartName;
3977 if (parseIdentifier(GapStartName))
3978 return Error(Loc, "expected identifier in directive");
3979 MCSymbol *GapStartSym = getContext().getOrCreateSymbol(GapStartName);
3980
3981 Loc = getLexer().getLoc();
3982 StringRef GapEndName;
3983 if (parseIdentifier(GapEndName))
3984 return Error(Loc, "expected identifier in directive");
3985 MCSymbol *GapEndSym = getContext().getOrCreateSymbol(GapEndName);
3986
3987 Ranges.push_back({GapStartSym, GapEndSym});
3988 }
3989
3990 StringRef CVDefRangeTypeStr;
3991 if (parseToken(
3992 AsmToken::Comma,
3993 "expected comma before def_range type in .cv_def_range directive") ||
3994 parseIdentifier(CVDefRangeTypeStr))
3995 return Error(Loc, "expected def_range type in directive");
3996
3997 StringMap<CVDefRangeType>::const_iterator CVTypeIt =
3998 CVDefRangeTypeMap.find(CVDefRangeTypeStr);
3999 CVDefRangeType CVDRType = (CVTypeIt == CVDefRangeTypeMap.end())
4000 ? CVDR_DEFRANGE
4001 : CVTypeIt->getValue();
4002 switch (CVDRType) {
4003 case CVDR_DEFRANGE_REGISTER: {
4004 int64_t DRRegister;
4005 if (parseToken(AsmToken::Comma, "expected comma before register number in "
4006 ".cv_def_range directive") ||
4007 parseAbsoluteExpression(DRRegister))
4008 return Error(Loc, "expected register number");
4009
4010 codeview::DefRangeRegisterHeader DRHdr;
4011 DRHdr.Register = DRRegister;
4012 DRHdr.MayHaveNoName = 0;
4013 getStreamer().emitCVDefRangeDirective(Ranges, DRHdr);
4014 break;
4015 }
4016 case CVDR_DEFRANGE_FRAMEPOINTER_REL: {
4017 int64_t DROffset;
4018 if (parseToken(AsmToken::Comma,
4019 "expected comma before offset in .cv_def_range directive") ||
4020 parseAbsoluteExpression(DROffset))
4021 return Error(Loc, "expected offset value");
4022
4023 codeview::DefRangeFramePointerRelHeader DRHdr;
4024 DRHdr.Offset = DROffset;
4025 getStreamer().emitCVDefRangeDirective(Ranges, DRHdr);
4026 break;
4027 }
4028 case CVDR_DEFRANGE_SUBFIELD_REGISTER: {
4029 int64_t DRRegister;
4030 int64_t DROffsetInParent;
4031 if (parseToken(AsmToken::Comma, "expected comma before register number in "
4032 ".cv_def_range directive") ||
4033 parseAbsoluteExpression(DRRegister))
4034 return Error(Loc, "expected register number");
4035 if (parseToken(AsmToken::Comma,
4036 "expected comma before offset in .cv_def_range directive") ||
4037 parseAbsoluteExpression(DROffsetInParent))
4038 return Error(Loc, "expected offset value");
4039
4040 codeview::DefRangeSubfieldRegisterHeader DRHdr;
4041 DRHdr.Register = DRRegister;
4042 DRHdr.MayHaveNoName = 0;
4043 DRHdr.OffsetInParent = DROffsetInParent;
4044 getStreamer().emitCVDefRangeDirective(Ranges, DRHdr);
4045 break;
4046 }
4047 case CVDR_DEFRANGE_REGISTER_REL: {
4048 int64_t DRRegister;
4049 int64_t DRFlags;
4050 int64_t DRBasePointerOffset;
4051 if (parseToken(AsmToken::Comma, "expected comma before register number in "
4052 ".cv_def_range directive") ||
4053 parseAbsoluteExpression(DRRegister))
4054 return Error(Loc, "expected register value");
4055 if (parseToken(
4056 AsmToken::Comma,
4057 "expected comma before flag value in .cv_def_range directive") ||
4058 parseAbsoluteExpression(DRFlags))
4059 return Error(Loc, "expected flag value");
4060 if (parseToken(AsmToken::Comma, "expected comma before base pointer offset "
4061 "in .cv_def_range directive") ||
4062 parseAbsoluteExpression(DRBasePointerOffset))
4063 return Error(Loc, "expected base pointer offset value");
4064
4065 codeview::DefRangeRegisterRelHeader DRHdr;
4066 DRHdr.Register = DRRegister;
4067 DRHdr.Flags = DRFlags;
4068 DRHdr.BasePointerOffset = DRBasePointerOffset;
4069 getStreamer().emitCVDefRangeDirective(Ranges, DRHdr);
4070 break;
4071 }
4072 default:
4073 return Error(Loc, "unexpected def_range type in .cv_def_range directive");
4074 }
4075 return true;
4076}
4077
4078/// parseDirectiveCVString
4079/// ::= .cv_stringtable "string"
4080bool AsmParser::parseDirectiveCVString() {
4081 std::string Data;
4082 if (checkForValidSection() || parseEscapedString(Data))
4083 return true;
4084
4085 // Put the string in the table and emit the offset.
4086 std::pair<StringRef, unsigned> Insertion =
4087 getCVContext().addToStringTable(Data);
4088 getStreamer().emitInt32(Insertion.second);
4089 return false;
4090}
4091
4092/// parseDirectiveCVStringTable
4093/// ::= .cv_stringtable
4094bool AsmParser::parseDirectiveCVStringTable() {
4095 getStreamer().emitCVStringTableDirective();
4096 return false;
4097}
4098
4099/// parseDirectiveCVFileChecksums
4100/// ::= .cv_filechecksums
4101bool AsmParser::parseDirectiveCVFileChecksums() {
4102 getStreamer().emitCVFileChecksumsDirective();
4103 return false;
4104}
4105
4106/// parseDirectiveCVFileChecksumOffset
4107/// ::= .cv_filechecksumoffset fileno
4108bool AsmParser::parseDirectiveCVFileChecksumOffset() {
4109 int64_t FileNo;
4110 if (parseIntToken(FileNo, "expected identifier in directive"))
4111 return true;
4112 if (parseToken(AsmToken::EndOfStatement, "Expected End of Statement"))
4113 return true;
4114 getStreamer().emitCVFileChecksumOffsetDirective(FileNo);
4115 return false;
4116}
4117
4118/// parseDirectiveCVFPOData
4119/// ::= .cv_fpo_data procsym
4120bool AsmParser::parseDirectiveCVFPOData() {
4121 SMLoc DirLoc = getLexer().getLoc();
4122 StringRef ProcName;
4123 if (parseIdentifier(ProcName))
4124 return TokError("expected symbol name");
4125 if (parseEOL())
4126 return true;
4127 MCSymbol *ProcSym = getContext().getOrCreateSymbol(ProcName);
4128 getStreamer().EmitCVFPOData(ProcSym, DirLoc);
4129 return false;
4130}
4131
4132/// parseDirectiveCFISections
4133/// ::= .cfi_sections section [, section]
4134bool AsmParser::parseDirectiveCFISections() {
4135 StringRef Name;
4136 bool EH = false;
4137 bool Debug = false;
4138
4139 if (!parseOptionalToken(AsmToken::EndOfStatement)) {
4140 for (;;) {
4141 if (parseIdentifier(Name))
4142 return TokError("expected .eh_frame or .debug_frame");
4143 if (Name == ".eh_frame")
4144 EH = true;
4145 else if (Name == ".debug_frame")
4146 Debug = true;
4147 if (parseOptionalToken(AsmToken::EndOfStatement))
4148 break;
4149 if (parseComma())
4150 return true;
4151 }
4152 }
4153 getStreamer().emitCFISections(EH, Debug);
4154 return false;
4155}
4156
4157/// parseDirectiveCFIStartProc
4158/// ::= .cfi_startproc [simple]
4159bool AsmParser::parseDirectiveCFIStartProc() {
4160 StringRef Simple;
4161 if (!parseOptionalToken(AsmToken::EndOfStatement)) {
4162 if (check(parseIdentifier(Simple) || Simple != "simple",
4163 "unexpected token") ||
4164 parseEOL())
4165 return true;
4166 }
4167
4168 // TODO(kristina): Deal with a corner case of incorrect diagnostic context
4169 // being produced if this directive is emitted as part of preprocessor macro
4170 // expansion which can *ONLY* happen if Clang's cc1as is the API consumer.
4171 // Tools like llvm-mc on the other hand are not affected by it, and report
4172 // correct context information.
4173 getStreamer().emitCFIStartProc(!Simple.empty(), Lexer.getLoc());
4174 return false;
4175}
4176
4177/// parseDirectiveCFIEndProc
4178/// ::= .cfi_endproc
4179bool AsmParser::parseDirectiveCFIEndProc() {
4180 if (parseEOL())
4181 return true;
4182 getStreamer().emitCFIEndProc();
4183 return false;
4184}
4185
4186/// parse register name or number.
4187bool AsmParser::parseRegisterOrRegisterNumber(int64_t &Register,
4188 SMLoc DirectiveLoc) {
4189 unsigned RegNo;
4190
4191 if (getLexer().isNot(AsmToken::Integer)) {
4192 if (getTargetParser().ParseRegister(RegNo, DirectiveLoc, DirectiveLoc))
4193 return true;
4194 Register = getContext().getRegisterInfo()->getDwarfRegNum(RegNo, true);
4195 } else
4196 return parseAbsoluteExpression(Register);
4197
4198 return false;
4199}
4200
4201/// parseDirectiveCFIDefCfa
4202/// ::= .cfi_def_cfa register, offset
4203bool AsmParser::parseDirectiveCFIDefCfa(SMLoc DirectiveLoc) {
4204 int64_t Register = 0, Offset = 0;
4205 if (parseRegisterOrRegisterNumber(Register, DirectiveLoc) || parseComma() ||
4206 parseAbsoluteExpression(Offset) || parseEOL())
4207 return true;
4208
4209 getStreamer().emitCFIDefCfa(Register, Offset);
4210 return false;
4211}
4212
4213/// parseDirectiveCFIDefCfaOffset
4214/// ::= .cfi_def_cfa_offset offset
4215bool AsmParser::parseDirectiveCFIDefCfaOffset() {
4216 int64_t Offset = 0;
4217 if (parseAbsoluteExpression(Offset) || parseEOL())
4218 return true;
4219
4220 getStreamer().emitCFIDefCfaOffset(Offset);
4221 return false;
4222}
4223
4224/// parseDirectiveCFIRegister
4225/// ::= .cfi_register register, register
4226bool AsmParser::parseDirectiveCFIRegister(SMLoc DirectiveLoc) {
4227 int64_t Register1 = 0, Register2 = 0;
4228 if (parseRegisterOrRegisterNumber(Register1, DirectiveLoc) || parseComma() ||
4229 parseRegisterOrRegisterNumber(Register2, DirectiveLoc) || parseEOL())
4230 return true;
4231
4232 getStreamer().emitCFIRegister(Register1, Register2);
4233 return false;
4234}
4235
4236/// parseDirectiveCFIWindowSave
4237/// ::= .cfi_window_save
4238bool AsmParser::parseDirectiveCFIWindowSave() {
4239 if (parseEOL())
4240 return true;
4241 getStreamer().emitCFIWindowSave();
4242 return false;
4243}
4244
4245/// parseDirectiveCFIAdjustCfaOffset
4246/// ::= .cfi_adjust_cfa_offset adjustment
4247bool AsmParser::parseDirectiveCFIAdjustCfaOffset() {
4248 int64_t Adjustment = 0;
4249 if (parseAbsoluteExpression(Adjustment) || parseEOL())
4250 return true;
4251
4252 getStreamer().emitCFIAdjustCfaOffset(Adjustment);
4253 return false;
4254}
4255
4256/// parseDirectiveCFIDefCfaRegister
4257/// ::= .cfi_def_cfa_register register
4258bool AsmParser::parseDirectiveCFIDefCfaRegister(SMLoc DirectiveLoc) {
4259 int64_t Register = 0;
4260 if (parseRegisterOrRegisterNumber(Register, DirectiveLoc) || parseEOL())
4261 return true;
4262
4263 getStreamer().emitCFIDefCfaRegister(Register);
4264 return false;
4265}
4266
4267/// parseDirectiveCFILLVMDefAspaceCfa
4268/// ::= .cfi_llvm_def_aspace_cfa register, offset, address_space
4269bool AsmParser::parseDirectiveCFILLVMDefAspaceCfa(SMLoc DirectiveLoc) {
4270 int64_t Register = 0, Offset = 0, AddressSpace = 0;
4271 if (parseRegisterOrRegisterNumber(Register, DirectiveLoc) || parseComma() ||
4272 parseAbsoluteExpression(Offset) || parseComma() ||
4273 parseAbsoluteExpression(AddressSpace) || parseEOL())
4274 return true;
4275
4276 getStreamer().emitCFILLVMDefAspaceCfa(Register, Offset, AddressSpace);
4277 return false;
4278}
4279
4280/// parseDirectiveCFIOffset
4281/// ::= .cfi_offset register, offset
4282bool AsmParser::parseDirectiveCFIOffset(SMLoc DirectiveLoc) {
4283 int64_t Register = 0;
4284 int64_t Offset = 0;
4285
4286 if (parseRegisterOrRegisterNumber(Register, DirectiveLoc) || parseComma() ||
4287 parseAbsoluteExpression(Offset) || parseEOL())
4288 return true;
4289
4290 getStreamer().emitCFIOffset(Register, Offset);
4291 return false;
4292}
4293
4294/// parseDirectiveCFIRelOffset
4295/// ::= .cfi_rel_offset register, offset
4296bool AsmParser::parseDirectiveCFIRelOffset(SMLoc DirectiveLoc) {
4297 int64_t Register = 0, Offset = 0;
4298
4299 if (parseRegisterOrRegisterNumber(Register, DirectiveLoc) || parseComma() ||
4300 parseAbsoluteExpression(Offset) || parseEOL())
4301 return true;
4302
4303 getStreamer().emitCFIRelOffset(Register, Offset);
4304 return false;
4305}
4306
4307static bool isValidEncoding(int64_t Encoding) {
4308 if (Encoding & ~0xff)
4309 return false;
4310
4311 if (Encoding == dwarf::DW_EH_PE_omit)
4312 return true;
4313
4314 const unsigned Format = Encoding & 0xf;
4315 if (Format != dwarf::DW_EH_PE_absptr && Format != dwarf::DW_EH_PE_udata2 &&
4316 Format != dwarf::DW_EH_PE_udata4 && Format != dwarf::DW_EH_PE_udata8 &&
4317 Format != dwarf::DW_EH_PE_sdata2 && Format != dwarf::DW_EH_PE_sdata4 &&
4318 Format != dwarf::DW_EH_PE_sdata8 && Format != dwarf::DW_EH_PE_signed)
4319 return false;
4320
4321 const unsigned Application = Encoding & 0x70;
4322 if (Application != dwarf::DW_EH_PE_absptr &&
4323 Application != dwarf::DW_EH_PE_pcrel)
4324 return false;
4325
4326 return true;
4327}
4328
4329/// parseDirectiveCFIPersonalityOrLsda
4330/// IsPersonality true for cfi_personality, false for cfi_lsda
4331/// ::= .cfi_personality encoding, [symbol_name]
4332/// ::= .cfi_lsda encoding, [symbol_name]
4333bool AsmParser::parseDirectiveCFIPersonalityOrLsda(bool IsPersonality) {
4334 int64_t Encoding = 0;
4335 if (parseAbsoluteExpression(Encoding))
4336 return true;
4337 if (Encoding == dwarf::DW_EH_PE_omit)
4338 return false;
4339
4340 StringRef Name;
4341 if (check(!isValidEncoding(Encoding), "unsupported encoding.") ||
4342 parseComma() ||
4343 check(parseIdentifier(Name), "expected identifier in directive") ||
4344 parseEOL())
4345 return true;
4346
4347 MCSymbol *Sym = getContext().getOrCreateSymbol(Name);
4348
4349 if (IsPersonality)
4350 getStreamer().emitCFIPersonality(Sym, Encoding);
4351 else
4352 getStreamer().emitCFILsda(Sym, Encoding);
4353 return false;
4354}
4355
4356/// parseDirectiveCFIRememberState
4357/// ::= .cfi_remember_state
4358bool AsmParser::parseDirectiveCFIRememberState() {
4359 if (parseEOL())
4360 return true;
4361 getStreamer().emitCFIRememberState();
4362 return false;
4363}
4364
4365/// parseDirectiveCFIRestoreState
4366/// ::= .cfi_remember_state
4367bool AsmParser::parseDirectiveCFIRestoreState() {
4368 if (parseEOL())
4369 return true;
4370 getStreamer().emitCFIRestoreState();
4371 return false;
4372}
4373
4374/// parseDirectiveCFISameValue
4375/// ::= .cfi_same_value register
4376bool AsmParser::parseDirectiveCFISameValue(SMLoc DirectiveLoc) {
4377 int64_t Register = 0;
4378
4379 if (parseRegisterOrRegisterNumber(Register, DirectiveLoc) || parseEOL())
4380 return true;
4381
4382 getStreamer().emitCFISameValue(Register);
4383 return false;
4384}
4385
4386/// parseDirectiveCFIRestore
4387/// ::= .cfi_restore register
4388bool AsmParser::parseDirectiveCFIRestore(SMLoc DirectiveLoc) {
4389 int64_t Register = 0;
4390 if (parseRegisterOrRegisterNumber(Register, DirectiveLoc) || parseEOL())
4391 return true;
4392
4393 getStreamer().emitCFIRestore(Register);
4394 return false;
4395}
4396
4397/// parseDirectiveCFIEscape
4398/// ::= .cfi_escape expression[,...]
4399bool AsmParser::parseDirectiveCFIEscape() {
4400 std::string Values;
4401 int64_t CurrValue;
4402 if (parseAbsoluteExpression(CurrValue))
4403 return true;
4404
4405 Values.push_back((uint8_t)CurrValue);
4406
4407 while (getLexer().is(AsmToken::Comma)) {
4408 Lex();
4409
4410 if (parseAbsoluteExpression(CurrValue))
4411 return true;
4412
4413 Values.push_back((uint8_t)CurrValue);
4414 }
4415
4416 getStreamer().emitCFIEscape(Values);
4417 return false;
4418}
4419
4420/// parseDirectiveCFIReturnColumn
4421/// ::= .cfi_return_column register
4422bool AsmParser::parseDirectiveCFIReturnColumn(SMLoc DirectiveLoc) {
4423 int64_t Register = 0;
4424 if (parseRegisterOrRegisterNumber(Register, DirectiveLoc) || parseEOL())
4425 return true;
4426 getStreamer().emitCFIReturnColumn(Register);
4427 return false;
4428}
4429
4430/// parseDirectiveCFISignalFrame
4431/// ::= .cfi_signal_frame
4432bool AsmParser::parseDirectiveCFISignalFrame() {
4433 if (parseEOL())
4434 return true;
4435
4436 getStreamer().emitCFISignalFrame();
4437 return false;
4438}
4439
4440/// parseDirectiveCFIUndefined
4441/// ::= .cfi_undefined register
4442bool AsmParser::parseDirectiveCFIUndefined(SMLoc DirectiveLoc) {
4443 int64_t Register = 0;
4444
4445 if (parseRegisterOrRegisterNumber(Register, DirectiveLoc) || parseEOL())
4446 return true;
4447
4448 getStreamer().emitCFIUndefined(Register);
4449 return false;
4450}
4451
4452/// parseDirectiveAltmacro
4453/// ::= .altmacro
4454/// ::= .noaltmacro
4455bool AsmParser::parseDirectiveAltmacro(StringRef Directive) {
4456 if (parseEOL())
4457 return true;
4458 AltMacroMode = (Directive == ".altmacro");
4459 return false;
4460}
4461
4462/// parseDirectiveMacrosOnOff
4463/// ::= .macros_on
4464/// ::= .macros_off
4465bool AsmParser::parseDirectiveMacrosOnOff(StringRef Directive) {
4466 if (parseEOL())
4467 return true;
4468 setMacrosEnabled(Directive == ".macros_on");
4469 return false;
4470}
4471
4472/// parseDirectiveMacro
4473/// ::= .macro name[,] [parameters]
4474bool AsmParser::parseDirectiveMacro(SMLoc DirectiveLoc) {
4475 StringRef Name;
4476 if (parseIdentifier(Name))
4477 return TokError("expected identifier in '.macro' directive");
4478
4479 if (getLexer().is(AsmToken::Comma))
4480 Lex();
4481
4482 MCAsmMacroParameters Parameters;
4483 while (getLexer().isNot(AsmToken::EndOfStatement)) {
4484
4485 if (!Parameters.empty() && Parameters.back().Vararg)
4486 return Error(Lexer.getLoc(), "vararg parameter '" +
4487 Parameters.back().Name +
4488 "' should be the last parameter");
4489
4490 MCAsmMacroParameter Parameter;
4491 if (parseIdentifier(Parameter.Name))
4492 return TokError("expected identifier in '.macro' directive");
4493
4494 // Emit an error if two (or more) named parameters share the same name
4495 for (const MCAsmMacroParameter& CurrParam : Parameters)
4496 if (CurrParam.Name.equals(Parameter.Name))
4497 return TokError("macro '" + Name + "' has multiple parameters"
4498 " named '" + Parameter.Name + "'");
4499
4500 if (Lexer.is(AsmToken::Colon)) {
4501 Lex(); // consume ':'
4502
4503 SMLoc QualLoc;
4504 StringRef Qualifier;
4505
4506 QualLoc = Lexer.getLoc();
4507 if (parseIdentifier(Qualifier))
4508 return Error(QualLoc, "missing parameter qualifier for "
4509 "'" + Parameter.Name + "' in macro '" + Name + "'");
4510
4511 if (Qualifier == "req")
4512 Parameter.Required = true;
4513 else if (Qualifier == "vararg")
4514 Parameter.Vararg = true;
4515 else
4516 return Error(QualLoc, Qualifier + " is not a valid parameter qualifier "
4517 "for '" + Parameter.Name + "' in macro '" + Name + "'");
4518 }
4519
4520 if (getLexer().is(AsmToken::Equal)) {
4521 Lex();
4522
4523 SMLoc ParamLoc;
4524
4525 ParamLoc = Lexer.getLoc();
4526 if (parseMacroArgument(Parameter.Value, /*Vararg=*/false ))
4527 return true;
4528
4529 if (Parameter.Required)
4530 Warning(ParamLoc, "pointless default value for required parameter "
4531 "'" + Parameter.Name + "' in macro '" + Name + "'");
4532 }
4533
4534 Parameters.push_back(std::move(Parameter));
4535
4536 if (getLexer().is(AsmToken::Comma))
4537 Lex();
4538 }
4539
4540 // Eat just the end of statement.
4541 Lexer.Lex();
4542
4543 // Consuming deferred text, so use Lexer.Lex to ignore Lexing Errors
4544 AsmToken EndToken, StartToken = getTok();
4545 unsigned MacroDepth = 0;
4546 // Lex the macro definition.
4547 while (true) {
4548 // Ignore Lexing errors in macros.
4549 while (Lexer.is(AsmToken::Error)) {
4550 Lexer.Lex();
4551 }
4552
4553 // Check whether we have reached the end of the file.
4554 if (getLexer().is(AsmToken::Eof))
4555 return Error(DirectiveLoc, "no matching '.endmacro' in definition");
4556
4557 // Otherwise, check whether we have reach the .endmacro or the start of a
4558 // preprocessor line marker.
4559 if (getLexer().is(AsmToken::Identifier)) {
4560 if (getTok().getIdentifier() == ".endm" ||
4561 getTok().getIdentifier() == ".endmacro") {
4562 if (MacroDepth == 0) { // Outermost macro.
4563 EndToken = getTok();
4564 Lexer.Lex();
4565 if (getLexer().isNot(AsmToken::EndOfStatement))
4566 return TokError("unexpected token in '" + EndToken.getIdentifier() +
4567 "' directive");
4568 break;
4569 } else {
4570 // Otherwise we just found the end of an inner macro.
4571 --MacroDepth;
4572 }
4573 } else if (getTok().getIdentifier() == ".macro") {
4574 // We allow nested macros. Those aren't instantiated until the outermost
4575 // macro is expanded so just ignore them for now.
4576 ++MacroDepth;
4577 }
4578 } else if (Lexer.is(AsmToken::HashDirective)) {
4579 (void)parseCppHashLineFilenameComment(getLexer().getLoc());
4580 }
4581
4582 // Otherwise, scan til the end of the statement.
4583 eatToEndOfStatement();
4584 }
4585
4586 if (getContext().lookupMacro(Name)) {
4587 return Error(DirectiveLoc, "macro '" + Name + "' is already defined");
4588 }
4589
4590 const char *BodyStart = StartToken.getLoc().getPointer();
4591 const char *BodyEnd = EndToken.getLoc().getPointer();
4592 StringRef Body = StringRef(BodyStart, BodyEnd - BodyStart);
4593 checkForBadMacro(DirectiveLoc, Name, Body, Parameters);
4594 MCAsmMacro Macro(Name, Body, std::move(Parameters));
4595 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)
4596 Macro.dump())do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("asm-macros")) { dbgs() << "Defining new macro:\n"; Macro
.dump(); } } while (false)
;
4597 getContext().defineMacro(Name, std::move(Macro));
4598 return false;
4599}
4600
4601/// checkForBadMacro
4602///
4603/// With the support added for named parameters there may be code out there that
4604/// is transitioning from positional parameters. In versions of gas that did
4605/// not support named parameters they would be ignored on the macro definition.
4606/// But to support both styles of parameters this is not possible so if a macro
4607/// definition has named parameters but does not use them and has what appears
4608/// to be positional parameters, strings like $1, $2, ... and $n, then issue a
4609/// warning that the positional parameter found in body which have no effect.
4610/// Hoping the developer will either remove the named parameters from the macro
4611/// definition so the positional parameters get used if that was what was
4612/// intended or change the macro to use the named parameters. It is possible
4613/// this warning will trigger when the none of the named parameters are used
4614/// and the strings like $1 are infact to simply to be passed trough unchanged.
4615void AsmParser::checkForBadMacro(SMLoc DirectiveLoc, StringRef Name,
4616 StringRef Body,
4617 ArrayRef<MCAsmMacroParameter> Parameters) {
4618 // If this macro is not defined with named parameters the warning we are
4619 // checking for here doesn't apply.
4620 unsigned NParameters = Parameters.size();
4621 if (NParameters == 0)
4622 return;
4623
4624 bool NamedParametersFound = false;
4625 bool PositionalParametersFound = false;
4626
4627 // Look at the body of the macro for use of both the named parameters and what
4628 // are likely to be positional parameters. This is what expandMacro() is
4629 // doing when it finds the parameters in the body.
4630 while (!Body.empty()) {
4631 // Scan for the next possible parameter.
4632 std::size_t End = Body.size(), Pos = 0;
4633 for (; Pos != End; ++Pos) {
4634 // Check for a substitution or escape.
4635 // This macro is defined with parameters, look for \foo, \bar, etc.
4636 if (Body[Pos] == '\\' && Pos + 1 != End)
4637 break;
4638
4639 // This macro should have parameters, but look for $0, $1, ..., $n too.
4640 if (Body[Pos] != '$' || Pos + 1 == End)
4641 continue;
4642 char Next = Body[Pos + 1];
4643 if (Next == '$' || Next == 'n' ||
4644 isdigit(static_cast<unsigned char>(Next)))
4645 break;
4646 }
4647
4648 // Check if we reached the end.
4649 if (Pos == End)
4650 break;
4651
4652 if (Body[Pos] == '$') {
4653 switch (Body[Pos + 1]) {
4654 // $$ => $
4655 case '$':
4656 break;
4657
4658 // $n => number of arguments
4659 case 'n':
4660 PositionalParametersFound = true;
4661 break;
4662
4663 // $[0-9] => argument
4664 default: {
4665 PositionalParametersFound = true;
4666 break;
4667 }
4668 }
4669 Pos += 2;
4670 } else {
4671 unsigned I = Pos + 1;
4672 while (isIdentifierChar(Body[I]) && I + 1 != End)
4673 ++I;
4674
4675 const char *Begin = Body.data() + Pos + 1;
4676 StringRef Argument(Begin, I - (Pos + 1));
4677 unsigned Index = 0;
4678 for (; Index < NParameters; ++Index)
4679 if (Parameters[Index].Name == Argument)
4680 break;
4681
4682 if (Index == NParameters) {
4683 if (Body[Pos + 1] == '(' && Body[Pos + 2] == ')')
4684 Pos += 3;
4685 else {
4686 Pos = I;
4687 }
4688 } else {
4689 NamedParametersFound = true;
4690 Pos += 1 + Argument.size();
4691 }
4692 }
4693 // Update the scan point.
4694 Body = Body.substr(Pos);
4695 }
4696
4697 if (!NamedParametersFound && PositionalParametersFound)
4698 Warning(DirectiveLoc, "macro defined with named parameters which are not "
4699 "used in macro body, possible positional parameter "
4700 "found in body which will have no effect");
4701}
4702
4703/// parseDirectiveExitMacro
4704/// ::= .exitm
4705bool AsmParser::parseDirectiveExitMacro(StringRef Directive) {
4706 if (parseEOL())
4707 return true;
4708
4709 if (!isInsideMacroInstantiation())
4710 return TokError("unexpected '" + Directive + "' in file, "
4711 "no current macro definition");
4712
4713 // Exit all conditionals that are active in the current macro.
4714 while (TheCondStack.size() != ActiveMacros.back()->CondStackDepth) {
4715 TheCondState = TheCondStack.back();
4716 TheCondStack.pop_back();
4717 }
4718
4719 handleMacroExit();
4720 return false;
4721}
4722
4723/// parseDirectiveEndMacro
4724/// ::= .endm
4725/// ::= .endmacro
4726bool AsmParser::parseDirectiveEndMacro(StringRef Directive) {
4727 if (getLexer().isNot(AsmToken::EndOfStatement))
4728 return TokError("unexpected token in '" + Directive + "' directive");
4729
4730 // If we are inside a macro instantiation, terminate the current
4731 // instantiation.
4732 if (isInsideMacroInstantiation()) {
4733 handleMacroExit();
4734 return false;
4735 }
4736
4737 // Otherwise, this .endmacro is a stray entry in the file; well formed
4738 // .endmacro directives are handled during the macro definition parsing.
4739 return TokError("unexpected '" + Directive + "' in file, "
4740 "no current macro definition");
4741}
4742
4743/// parseDirectivePurgeMacro
4744/// ::= .purgem name
4745bool AsmParser::parseDirectivePurgeMacro(SMLoc DirectiveLoc) {
4746 StringRef Name;
4747 SMLoc Loc;
4748 if (parseTokenLoc(Loc) ||
4749 check(parseIdentifier(Name), Loc,
4750 "expected identifier in '.purgem' directive") ||
4751 parseEOL())
4752 return true;
4753
4754 if (!getContext().lookupMacro(Name))
4755 return Error(DirectiveLoc, "macro '" + Name + "' is not defined");
4756
4757 getContext().undefineMacro(Name);
4758 DEBUG_WITH_TYPE("asm-macros", dbgs()do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("asm-macros")) { dbgs() << "Un-defining macro: " <<
Name << "\n"; } } while (false)
4759 << "Un-defining macro: " << Name << "\n")do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("asm-macros")) { dbgs() << "Un-defining macro: " <<
Name << "\n"; } } while (false)
;
4760 return false;
4761}
4762
4763/// parseDirectiveBundleAlignMode
4764/// ::= {.bundle_align_mode} expression
4765bool AsmParser::parseDirectiveBundleAlignMode() {
4766 // Expect a single argument: an expression that evaluates to a constant
4767 // in the inclusive range 0-30.
4768 SMLoc ExprLoc = getLexer().getLoc();
4769 int64_t AlignSizePow2;
4770 if (checkForValidSection() || parseAbsoluteExpression(AlignSizePow2) ||
4771 parseEOL() ||
4772 check(AlignSizePow2 < 0 || AlignSizePow2 > 30, ExprLoc,
4773 "invalid bundle alignment size (expected between 0 and 30)"))
4774 return true;
4775
4776 // Because of AlignSizePow2's verified range we can safely truncate it to
4777 // unsigned.
4778 getStreamer().emitBundleAlignMode(static_cast<unsigned>(AlignSizePow2));
4779 return false;
4780}
4781
4782/// parseDirectiveBundleLock
4783/// ::= {.bundle_lock} [align_to_end]
4784bool AsmParser::parseDirectiveBundleLock() {
4785 if (checkForValidSection())
4786 return true;
4787 bool AlignToEnd = false;
4788
4789 StringRef Option;
4790 SMLoc Loc = getTok().getLoc();
4791 const char *kInvalidOptionError =
4792 "invalid option for '.bundle_lock' directive";
4793
4794 if (!parseOptionalToken(AsmToken::EndOfStatement)) {
4795 if (check(parseIdentifier(Option), Loc, kInvalidOptionError) ||
4796 check(Option != "align_to_end", Loc, kInvalidOptionError) || parseEOL())
4797 return true;
4798 AlignToEnd = true;
4799 }
4800
4801 getStreamer().emitBundleLock(AlignToEnd);
4802 return false;
4803}
4804
4805/// parseDirectiveBundleLock
4806/// ::= {.bundle_lock}
4807bool AsmParser::parseDirectiveBundleUnlock() {
4808 if (checkForValidSection() || parseEOL())
4809 return true;
4810
4811 getStreamer().emitBundleUnlock();
4812 return false;
4813}
4814
4815/// parseDirectiveSpace
4816/// ::= (.skip | .space) expression [ , expression ]
4817bool AsmParser::parseDirectiveSpace(StringRef IDVal) {
4818 SMLoc NumBytesLoc = Lexer.getLoc();
4819 const MCExpr *NumBytes;
4820 if (checkForValidSection() || parseExpression(NumBytes))
4821 return true;
4822
4823 int64_t FillExpr = 0;
4824 if (parseOptionalToken(AsmToken::Comma))
4825 if (parseAbsoluteExpression(FillExpr))
4826 return true;
4827 if (parseEOL())
4828 return true;
4829
4830 // FIXME: Sometimes the fill expr is 'nop' if it isn't supplied, instead of 0.
4831 getStreamer().emitFill(*NumBytes, FillExpr, NumBytesLoc);
4832
4833 return false;
4834}
4835
4836/// parseDirectiveDCB
4837/// ::= .dcb.{b, l, w} expression, expression
4838bool AsmParser::parseDirectiveDCB(StringRef IDVal, unsigned Size) {
4839 SMLoc NumValuesLoc = Lexer.getLoc();
4840 int64_t NumValues;
4841 if (checkForValidSection() || parseAbsoluteExpression(NumValues))
4842 return true;
4843
4844 if (NumValues < 0) {
4845 Warning(NumValuesLoc, "'" + Twine(IDVal) + "' directive with negative repeat count has no effect");
4846 return false;
4847 }
4848
4849 if (parseComma())
4850 return true;
4851
4852 const MCExpr *Value;
4853 SMLoc ExprLoc = getLexer().getLoc();
4854 if (parseExpression(Value))
4855 return true;
4856
4857 // Special case constant expressions to match code generator.
4858 if (const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Value)) {
4859 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~++20210621111111+acefe0eaaf82/llvm/lib/MC/MCParser/AsmParser.cpp"
, 4859, __extension__ __PRETTY_FUNCTION__))
;
4860 uint64_t IntValue = MCE->getValue();
4861 if (!isUIntN(8 * Size, IntValue) && !isIntN(8 * Size, IntValue))
4862 return Error(ExprLoc, "literal value out of range for directive");
4863 for (uint64_t i = 0, e = NumValues; i != e; ++i)
4864 getStreamer().emitIntValue(IntValue, Size);
4865 } else {
4866 for (uint64_t i = 0, e = NumValues; i != e; ++i)
4867 getStreamer().emitValue(Value, Size, ExprLoc);
4868 }
4869
4870 return parseEOL();
4871}
4872
4873/// parseDirectiveRealDCB
4874/// ::= .dcb.{d, s} expression, expression
4875bool AsmParser::parseDirectiveRealDCB(StringRef IDVal, const fltSemantics &Semantics) {
4876 SMLoc NumValuesLoc = Lexer.getLoc();
4877 int64_t NumValues;
4878 if (checkForValidSection() || parseAbsoluteExpression(NumValues))
4879 return true;
4880
4881 if (NumValues < 0) {
4882 Warning(NumValuesLoc, "'" + Twine(IDVal) + "' directive with negative repeat count has no effect");
4883 return false;
4884 }
4885
4886 if (parseComma())
4887 return true;
4888
4889 APInt AsInt;
4890 if (parseRealValue(Semantics, AsInt) || parseEOL())
4891 return true;
4892
4893 for (uint64_t i = 0, e = NumValues; i != e; ++i)
4894 getStreamer().emitIntValue(AsInt.getLimitedValue(),
4895 AsInt.getBitWidth() / 8);
4896
4897 return false;
4898}
4899
4900/// parseDirectiveDS
4901/// ::= .ds.{b, d, l, p, s, w, x} expression
4902bool AsmParser::parseDirectiveDS(StringRef IDVal, unsigned Size) {
4903 SMLoc NumValuesLoc = Lexer.getLoc();
4904 int64_t NumValues;
4905 if (checkForValidSection() || parseAbsoluteExpression(NumValues) ||
4906 parseEOL())
4907 return true;
4908
4909 if (NumValues < 0) {
4910 Warning(NumValuesLoc, "'" + Twine(IDVal) + "' directive with negative repeat count has no effect");
4911 return false;
4912 }
4913
4914 for (uint64_t i = 0, e = NumValues; i != e; ++i)
4915 getStreamer().emitFill(Size, 0);
4916
4917 return false;
4918}
4919
4920/// parseDirectiveLEB128
4921/// ::= (.sleb128 | .uleb128) [ expression (, expression)* ]
4922bool AsmParser::parseDirectiveLEB128(bool Signed) {
4923 if (checkForValidSection())
4924 return true;
4925
4926 auto parseOp = [&]() -> bool {
4927 const MCExpr *Value;
4928 if (parseExpression(Value))
4929 return true;
4930 if (Signed)
4931 getStreamer().emitSLEB128Value(Value);
4932 else
4933 getStreamer().emitULEB128Value(Value);
4934 return false;
4935 };
4936
4937 return parseMany(parseOp);
4938}
4939
4940/// parseDirectiveSymbolAttribute
4941/// ::= { ".globl", ".weak", ... } [ identifier ( , identifier )* ]
4942bool AsmParser::parseDirectiveSymbolAttribute(MCSymbolAttr Attr) {
4943 auto parseOp = [&]() -> bool {
4944 StringRef Name;
4945 SMLoc Loc = getTok().getLoc();
4946 if (parseIdentifier(Name))
4947 return Error(Loc, "expected identifier");
4948
4949 if (discardLTOSymbol(Name))
4950 return false;
4951
4952 MCSymbol *Sym = getContext().getOrCreateSymbol(Name);
4953
4954 // Assembler local symbols don't make any sense here. Complain loudly.
4955 if (Sym->isTemporary())
4956 return Error(Loc, "non-local symbol required");
4957
4958 if (!getStreamer().emitSymbolAttribute(Sym, Attr))
4959 return Error(Loc, "unable to emit symbol attribute");
4960 return false;
4961 };
4962
4963 return parseMany(parseOp);
4964}
4965
4966/// parseDirectiveComm
4967/// ::= ( .comm | .lcomm ) identifier , size_expression [ , align_expression ]
4968bool AsmParser::parseDirectiveComm(bool IsLocal) {
4969 if (checkForValidSection())
4970 return true;
4971
4972 SMLoc IDLoc = getLexer().getLoc();
4973 StringRef Name;
4974 if (parseIdentifier(Name))
4975 return TokError("expected identifier in directive");
4976
4977 // Handle the identifier as the key symbol.
4978 MCSymbol *Sym = getContext().getOrCreateSymbol(Name);
4979
4980 if (parseComma())
4981 return true;
4982
4983 int64_t Size;
4984 SMLoc SizeLoc = getLexer().getLoc();
4985 if (parseAbsoluteExpression(Size))
4986 return true;
4987
4988 int64_t Pow2Alignment = 0;
4989 SMLoc Pow2AlignmentLoc;
4990 if (getLexer().is(AsmToken::Comma)) {
4991 Lex();
4992 Pow2AlignmentLoc = getLexer().getLoc();
4993 if (parseAbsoluteExpression(Pow2Alignment))
4994 return true;
4995
4996 LCOMM::LCOMMType LCOMM = Lexer.getMAI().getLCOMMDirectiveAlignmentType();
4997 if (IsLocal && LCOMM == LCOMM::NoAlignment)
4998 return Error(Pow2AlignmentLoc, "alignment not supported on this target");
4999
5000 // If this target takes alignments in bytes (not log) validate and convert.
5001 if ((!IsLocal && Lexer.getMAI().getCOMMDirectiveAlignmentIsInBytes()) ||
5002 (IsLocal && LCOMM == LCOMM::ByteAlignment)) {
5003 if (!isPowerOf2_64(Pow2Alignment))
5004 return Error(Pow2AlignmentLoc, "alignment must be a power of 2");
5005 Pow2Alignment = Log2_64(Pow2Alignment);
5006 }
5007 }
5008
5009 if (parseEOL())
5010 return true;
5011
5012 // NOTE: a size of zero for a .comm should create a undefined symbol
5013 // but a size of .lcomm creates a bss symbol of size zero.
5014 if (Size < 0)
5015 return Error(SizeLoc, "invalid '.comm' or '.lcomm' directive size, can't "
5016 "be less than zero");
5017
5018 // NOTE: The alignment in the directive is a power of 2 value, the assembler
5019 // may internally end up wanting an alignment in bytes.
5020 // FIXME: Diagnose overflow.
5021 if (Pow2Alignment < 0)
5022 return Error(Pow2AlignmentLoc, "invalid '.comm' or '.lcomm' directive "
5023 "alignment, can't be less than zero");
5024
5025 Sym->redefineIfPossible();
5026 if (!Sym->isUndefined())
5027 return Error(IDLoc, "invalid symbol redefinition");
5028
5029 // Create the Symbol as a common or local common with Size and Pow2Alignment
5030 if (IsLocal) {
5031 getStreamer().emitLocalCommonSymbol(Sym, Size, 1 << Pow2Alignment);
5032 return false;
5033 }
5034
5035 getStreamer().emitCommonSymbol(Sym, Size, 1 << Pow2Alignment);
5036 return false;
5037}
5038
5039/// parseDirectiveAbort
5040/// ::= .abort [... message ...]
5041bool AsmParser::parseDirectiveAbort() {
5042 // FIXME: Use loc from directive.
5043 SMLoc Loc = getLexer().getLoc();
5044
5045 StringRef Str = parseStringToEndOfStatement();
5046 if (parseEOL())
5047 return true;
5048
5049 if (Str.empty())
5050 return Error(Loc, ".abort detected. Assembly stopping.");
5051 else
5052 return Error(Loc, ".abort '" + Str + "' detected. Assembly stopping.");
5053 // FIXME: Actually abort assembly here.
5054
5055 return false;
5056}
5057
5058/// parseDirectiveInclude
5059/// ::= .include "filename"
5060bool AsmParser::parseDirectiveInclude() {
5061 // Allow the strings to have escaped octal character sequence.
5062 std::string Filename;
5063 SMLoc IncludeLoc = getTok().getLoc();
5064
5065 if (check(getTok().isNot(AsmToken::String),
5066 "expected string in '.include' directive") ||
5067 parseEscapedString(Filename) ||
5068 check(getTok().isNot(AsmToken::EndOfStatement),
5069 "unexpected token in '.include' directive") ||
5070 // Attempt to switch the lexer to the included file before consuming the
5071 // end of statement to avoid losing it when we switch.
5072 check(enterIncludeFile(Filename), IncludeLoc,
5073 "Could not find include file '" + Filename + "'"))
5074 return true;
5075
5076 return false;
5077}
5078
5079/// parseDirectiveIncbin
5080/// ::= .incbin "filename" [ , skip [ , count ] ]
5081bool AsmParser::parseDirectiveIncbin() {
5082 // Allow the strings to have escaped octal character sequence.
5083 std::string Filename;
5084 SMLoc IncbinLoc = getTok().getLoc();
5085 if (check(getTok().isNot(AsmToken::String),
5086 "expected string in '.incbin' directive") ||
5087 parseEscapedString(Filename))
5088 return true;
5089
5090 int64_t Skip = 0;
5091 const MCExpr *Count = nullptr;
5092 SMLoc SkipLoc, CountLoc;
5093 if (parseOptionalToken(AsmToken::Comma)) {
5094 // The skip expression can be omitted while specifying the count, e.g:
5095 // .incbin "filename",,4
5096 if (getTok().isNot(AsmToken::Comma)) {
5097 if (parseTokenLoc(SkipLoc) || parseAbsoluteExpression(Skip))
5098 return true;
5099 }
5100 if (parseOptionalToken(AsmToken::Comma)) {
5101 CountLoc = getTok().getLoc();
5102 if (parseExpression(Count))
5103 return true;
5104 }
5105 }
5106
5107 if (parseEOL())
5108 return true;
5109
5110 if (check(Skip < 0, SkipLoc, "skip is negative"))
5111 return true;
5112
5113 // Attempt to process the included file.
5114 if (processIncbinFile(Filename, Skip, Count, CountLoc))
5115 return Error(IncbinLoc, "Could not find incbin file '" + Filename + "'");
5116 return false;
5117}
5118
5119/// parseDirectiveIf
5120/// ::= .if{,eq,ge,gt,le,lt,ne} expression
5121bool AsmParser::parseDirectiveIf(SMLoc DirectiveLoc, DirectiveKind DirKind) {
5122 TheCondStack.push_back(TheCondState);
5123 TheCondState.TheCond = AsmCond::IfCond;
5124 if (TheCondState.Ignore) {
5125 eatToEndOfStatement();
5126 } else {
5127 int64_t ExprValue;
5128 if (parseAbsoluteExpression(ExprValue) || parseEOL())
5129 return true;
5130
5131 switch (DirKind) {
5132 default:
5133 llvm_unreachable("unsupported directive")::llvm::llvm_unreachable_internal("unsupported directive", "/build/llvm-toolchain-snapshot-13~++20210621111111+acefe0eaaf82/llvm/lib/MC/MCParser/AsmParser.cpp"
, 5133)
;
5134 case DK_IF:
5135 case DK_IFNE:
5136 break;
5137 case DK_IFEQ:
5138 ExprValue = ExprValue == 0;
5139 break;
5140 case DK_IFGE:
5141 ExprValue = ExprValue >= 0;
5142 break;
5143 case DK_IFGT:
5144 ExprValue = ExprValue > 0;
5145 break;
5146 case DK_IFLE:
5147 ExprValue = ExprValue <= 0;
5148 break;
5149 case DK_IFLT:
5150 ExprValue = ExprValue < 0;
5151 break;
5152 }
5153
5154 TheCondState.CondMet = ExprValue;
5155 TheCondState.Ignore = !TheCondState.CondMet;
5156 }
5157
5158 return false;
5159}
5160
5161/// parseDirectiveIfb
5162/// ::= .ifb string
5163bool AsmParser::parseDirectiveIfb(SMLoc DirectiveLoc, bool ExpectBlank) {
5164 TheCondStack.push_back(TheCondState);
5165 TheCondState.TheCond = AsmCond::IfCond;
5166
5167 if (TheCondState.Ignore) {
5168 eatToEndOfStatement();
5169 } else {
5170 StringRef Str = parseStringToEndOfStatement();
5171
5172 if (parseEOL())
5173 return true;
5174
5175 TheCondState.CondMet = ExpectBlank == Str.empty();
5176 TheCondState.Ignore = !TheCondState.CondMet;
5177 }
5178
5179 return false;
5180}
5181
5182/// parseDirectiveIfc
5183/// ::= .ifc string1, string2
5184/// ::= .ifnc string1, string2
5185bool AsmParser::parseDirectiveIfc(SMLoc DirectiveLoc, bool ExpectEqual) {
5186 TheCondStack.push_back(TheCondState);
5187 TheCondState.TheCond = AsmCond::IfCond;
5188
5189 if (TheCondState.Ignore) {
5190 eatToEndOfStatement();
5191 } else {
5192 StringRef Str1 = parseStringToComma();
5193
5194 if (parseComma())
5195 return true;
5196
5197 StringRef Str2 = parseStringToEndOfStatement();
5198
5199 if (parseEOL())
5200 return true;
5201
5202 TheCondState.CondMet = ExpectEqual == (Str1.trim() == Str2.trim());
5203 TheCondState.Ignore = !TheCondState.CondMet;
5204 }
5205
5206 return false;
5207}
5208
5209/// parseDirectiveIfeqs
5210/// ::= .ifeqs string1, string2
5211bool AsmParser::parseDirectiveIfeqs(SMLoc DirectiveLoc, bool ExpectEqual) {
5212 if (Lexer.isNot(AsmToken::String)) {
5213 if (ExpectEqual)
5214 return TokError("expected string parameter for '.ifeqs' directive");
5215 return TokError("expected string parameter for '.ifnes' directive");
5216 }
5217
5218 StringRef String1 = getTok().getStringContents();
5219 Lex();
5220
5221 if (Lexer.isNot(AsmToken::Comma)) {
5222 if (ExpectEqual)
5223 return TokError(
5224 "expected comma after first string for '.ifeqs' directive");
5225 return TokError("expected comma after first string for '.ifnes' directive");
5226 }
5227
5228 Lex();
5229
5230 if (Lexer.isNot(AsmToken::String)) {
5231 if (ExpectEqual)
5232 return TokError("expected string parameter for '.ifeqs' directive");
5233 return TokError("expected string parameter for '.ifnes' directive");
5234 }
5235
5236 StringRef String2 = getTok().getStringContents();
5237 Lex();
5238
5239 TheCondStack.push_back(TheCondState);
5240 TheCondState.TheCond = AsmCond::IfCond;
5241 TheCondState.CondMet = ExpectEqual == (String1 == String2);
5242 TheCondState.Ignore = !TheCondState.CondMet;
5243
5244 return false;
5245}
5246
5247/// parseDirectiveIfdef
5248/// ::= .ifdef symbol
5249bool AsmParser::parseDirectiveIfdef(SMLoc DirectiveLoc, bool expect_defined) {
5250 StringRef Name;
5251 TheCondStack.push_back(TheCondState);
5252 TheCondState.TheCond = AsmCond::IfCond;
5253
5254 if (TheCondState.Ignore) {
5255 eatToEndOfStatement();
5256 } else {
5257 if (check(parseIdentifier(Name), "expected identifier after '.ifdef'") ||
5258 parseEOL())
5259 return true;
5260
5261 MCSymbol *Sym = getContext().lookupSymbol(Name);
5262
5263 if (expect_defined)
5264 TheCondState.CondMet = (Sym && !Sym->isUndefined(false));
5265 else
5266 TheCondState.CondMet = (!Sym || Sym->isUndefined(false));
5267 TheCondState.Ignore = !TheCondState.CondMet;
5268 }
5269
5270 return false;
5271}
5272
5273/// parseDirectiveElseIf
5274/// ::= .elseif expression
5275bool AsmParser::parseDirectiveElseIf(SMLoc DirectiveLoc) {
5276 if (TheCondState.TheCond != AsmCond::IfCond &&
5277 TheCondState.TheCond != AsmCond::ElseIfCond)
5278 return Error(DirectiveLoc, "Encountered a .elseif that doesn't follow an"
5279 " .if or an .elseif");
5280 TheCondState.TheCond = AsmCond::ElseIfCond;
5281
5282 bool LastIgnoreState = false;
5283 if (!TheCondStack.empty())
5284 LastIgnoreState = TheCondStack.back().Ignore;
5285 if (LastIgnoreState || TheCondState.CondMet) {
5286 TheCondState.Ignore = true;
5287 eatToEndOfStatement();
5288 } else {
5289 int64_t ExprValue;
5290 if (parseAbsoluteExpression(ExprValue))
5291 return true;
5292
5293 if (parseEOL())
5294 return true;
5295
5296 TheCondState.CondMet = ExprValue;
5297 TheCondState.Ignore = !TheCondState.CondMet;
5298 }
5299
5300 return false;
5301}
5302
5303/// parseDirectiveElse
5304/// ::= .else
5305bool AsmParser::parseDirectiveElse(SMLoc DirectiveLoc) {
5306 if (parseEOL())
5307 return true;
5308
5309 if (TheCondState.TheCond != AsmCond::IfCond &&
5310 TheCondState.TheCond != AsmCond::ElseIfCond)
5311 return Error(DirectiveLoc, "Encountered a .else that doesn't follow "
5312 " an .if or an .elseif");
5313 TheCondState.TheCond = AsmCond::ElseCond;
5314 bool LastIgnoreState = false;
5315 if (!TheCondStack.empty())
5316 LastIgnoreState = TheCondStack.back().Ignore;
5317 if (LastIgnoreState || TheCondState.CondMet)
5318 TheCondState.Ignore = true;
5319 else
5320 TheCondState.Ignore = false;
5321
5322 return false;
5323}
5324
5325/// parseDirectiveEnd
5326/// ::= .end
5327bool AsmParser::parseDirectiveEnd(SMLoc DirectiveLoc) {
5328 if (parseEOL())
5329 return true;
5330
5331 while (Lexer.isNot(AsmToken::Eof))
5332 Lexer.Lex();
5333
5334 return false;
5335}
5336
5337/// parseDirectiveError
5338/// ::= .err
5339/// ::= .error [string]
5340bool AsmParser::parseDirectiveError(SMLoc L, bool WithMessage) {
5341 if (!TheCondStack.empty()) {
5342 if (TheCondStack.back().Ignore) {
5343 eatToEndOfStatement();
5344 return false;
5345 }
5346 }
5347
5348 if (!WithMessage)
5349 return Error(L, ".err encountered");
5350
5351 StringRef Message = ".error directive invoked in source file";
5352 if (Lexer.isNot(AsmToken::EndOfStatement)) {
5353 if (Lexer.isNot(AsmToken::String))
5354 return TokError(".error argument must be a string");
5355
5356 Message = getTok().getStringContents();
5357 Lex();
5358 }
5359
5360 return Error(L, Message);
5361}
5362
5363/// parseDirectiveWarning
5364/// ::= .warning [string]
5365bool AsmParser::parseDirectiveWarning(SMLoc L) {
5366 if (!TheCondStack.empty()) {
5367 if (TheCondStack.back().Ignore) {
5368 eatToEndOfStatement();
5369 return false;
5370 }
5371 }
5372
5373 StringRef Message = ".warning directive invoked in source file";
5374
5375 if (!parseOptionalToken(AsmToken::EndOfStatement)) {
5376 if (Lexer.isNot(AsmToken::String))
5377 return TokError(".warning argument must be a string");
5378
5379 Message = getTok().getStringContents();
5380 Lex();
5381 if (parseEOL())
5382 return true;
5383 }
5384
5385 return Warning(L, Message);
5386}
5387
5388/// parseDirectiveEndIf
5389/// ::= .endif
5390bool AsmParser::parseDirectiveEndIf(SMLoc DirectiveLoc) {
5391 if (parseEOL())
5392 return true;
5393
5394 if ((TheCondState.TheCond == AsmCond::NoCond) || TheCondStack.empty())
5395 return Error(DirectiveLoc, "Encountered a .endif that doesn't follow "
5396 "an .if or .else");
5397 if (!TheCondStack.empty()) {
5398 TheCondState = TheCondStack.back();
5399 TheCondStack.pop_back();
5400 }
5401
5402 return false;
5403}
5404
5405void AsmParser::initializeDirectiveKindMap() {
5406 /* Lookup will be done with the directive
5407 * converted to lower case, so all these
5408 * keys should be lower case.
5409 * (target specific directives are handled
5410 * elsewhere)
5411 */
5412 DirectiveKindMap[".set"] = DK_SET;
5413 DirectiveKindMap[".equ"] = DK_EQU;
5414 DirectiveKindMap[".equiv"] = DK_EQUIV;
5415 DirectiveKindMap[".ascii"] = DK_ASCII;
5416 DirectiveKindMap[".asciz"] = DK_ASCIZ;
5417 DirectiveKindMap[".string"] = DK_STRING;
5418 DirectiveKindMap[".byte"] = DK_BYTE;
5419 DirectiveKindMap[".short"] = DK_SHORT;
5420 DirectiveKindMap[".value"] = DK_VALUE;
5421 DirectiveKindMap[".2byte"] = DK_2BYTE;
5422 DirectiveKindMap[".long"] = DK_LONG;
5423 DirectiveKindMap[".int"] = DK_INT;
5424 DirectiveKindMap[".4byte"] = DK_4BYTE;
5425 DirectiveKindMap[".quad"] = DK_QUAD;
5426 DirectiveKindMap[".8byte"] = DK_8BYTE;
5427 DirectiveKindMap[".octa"] = DK_OCTA;
5428 DirectiveKindMap[".single"] = DK_SINGLE;
5429 DirectiveKindMap[".float"] = DK_FLOAT;
5430 DirectiveKindMap[".double"] = DK_DOUBLE;
5431 DirectiveKindMap[".align"] = DK_ALIGN;
5432 DirectiveKindMap[".align32"] = DK_ALIGN32;
5433 DirectiveKindMap[".balign"] = DK_BALIGN;
5434 DirectiveKindMap[".balignw"] = DK_BALIGNW;
5435 DirectiveKindMap[".balignl"] = DK_BALIGNL;
5436 DirectiveKindMap[".p2align"] = DK_P2ALIGN;
5437 DirectiveKindMap[".p2alignw"] = DK_P2ALIGNW;
5438 DirectiveKindMap[".p2alignl"] = DK_P2ALIGNL;
5439 DirectiveKindMap[".org"] = DK_ORG;
5440 DirectiveKindMap[".fill"] = DK_FILL;
5441 DirectiveKindMap[".zero"] = DK_ZERO;
5442 DirectiveKindMap[".extern"] = DK_EXTERN;
5443 DirectiveKindMap[".globl"] = DK_GLOBL;
5444 DirectiveKindMap[".global"] = DK_GLOBAL;
5445 DirectiveKindMap[".lazy_reference"] = DK_LAZY_REFERENCE;
5446 DirectiveKindMap[".no_dead_strip"] = DK_NO_DEAD_STRIP;
5447 DirectiveKindMap[".symbol_resolver"] = DK_SYMBOL_RESOLVER;
5448 DirectiveKindMap[".private_extern"] = DK_PRIVATE_EXTERN;
5449 DirectiveKindMap[".reference"] = DK_REFERENCE;
5450 DirectiveKindMap[".weak_definition"] = DK_WEAK_DEFINITION;
5451 DirectiveKindMap[".weak_reference"] = DK_WEAK_REFERENCE;
5452 DirectiveKindMap[".weak_def_can_be_hidden"] = DK_WEAK_DEF_CAN_BE_HIDDEN;
5453 DirectiveKindMap[".cold"] = DK_COLD;
5454 DirectiveKindMap[".comm"] = DK_COMM;
5455 DirectiveKindMap[".common"] = DK_COMMON;
5456 DirectiveKindMap[".lcomm"] = DK_LCOMM;
5457 DirectiveKindMap[".abort"] = DK_ABORT;
5458 DirectiveKindMap[".include"] = DK_INCLUDE;
5459 DirectiveKindMap[".incbin"] = DK_INCBIN;
5460 DirectiveKindMap[".code16"] = DK_CODE16;
5461 DirectiveKindMap[".code16gcc"] = DK_CODE16GCC;
5462 DirectiveKindMap[".rept"] = DK_REPT;
5463 DirectiveKindMap[".rep"] = DK_REPT;
5464 DirectiveKindMap[".irp"] = DK_IRP;
5465 DirectiveKindMap[".irpc"] = DK_IRPC;
5466 DirectiveKindMap[".endr"] = DK_ENDR;
5467 DirectiveKindMap[".bundle_align_mode"] = DK_BUNDLE_ALIGN_MODE;
5468 DirectiveKindMap[".bundle_lock"] = DK_BUNDLE_LOCK;
5469 DirectiveKindMap[".bundle_unlock"] = DK_BUNDLE_UNLOCK;
5470 DirectiveKindMap[".if"] = DK_IF;
5471 DirectiveKindMap[".ifeq"] = DK_IFEQ;
5472 DirectiveKindMap[".ifge"] = DK_IFGE;
5473 DirectiveKindMap[".ifgt"] = DK_IFGT;
5474 DirectiveKindMap[".ifle"] = DK_IFLE;
5475 DirectiveKindMap[".iflt"] = DK_IFLT;
5476 DirectiveKindMap[".ifne"] = DK_IFNE;
5477 DirectiveKindMap[".ifb"] = DK_IFB;
5478 DirectiveKindMap[".ifnb"] = DK_IFNB;
5479 DirectiveKindMap[".ifc"] = DK_IFC;
5480 DirectiveKindMap[".ifeqs"] = DK_IFEQS;
5481 DirectiveKindMap[".ifnc"] = DK_IFNC;
5482 DirectiveKindMap[".ifnes"] = DK_IFNES;
5483 DirectiveKindMap[".ifdef"] = DK_IFDEF;
5484 DirectiveKindMap[".ifndef"] = DK_IFNDEF;
5485 DirectiveKindMap[".ifnotdef"] = DK_IFNOTDEF;
5486 DirectiveKindMap[".elseif"] = DK_ELSEIF;
5487 DirectiveKindMap[".else"] = DK_ELSE;
5488 DirectiveKindMap[".end"] = DK_END;
5489 DirectiveKindMap[".endif"] = DK_ENDIF;
5490 DirectiveKindMap[".skip"] = DK_SKIP;
5491 DirectiveKindMap[".space"] = DK_SPACE;
5492 DirectiveKindMap[".file"] = DK_FILE;
5493 DirectiveKindMap[".line"] = DK_LINE;
5494 DirectiveKindMap[".loc"] = DK_LOC;
5495 DirectiveKindMap[".stabs"] = DK_STABS;
5496 DirectiveKindMap[".cv_file"] = DK_CV_FILE;
5497 DirectiveKindMap[".cv_func_id"] = DK_CV_FUNC_ID;
5498 DirectiveKindMap[".cv_loc"] = DK_CV_LOC;
5499 DirectiveKindMap[".cv_linetable"] = DK_CV_LINETABLE;
5500 DirectiveKindMap[".cv_inline_linetable"] = DK_CV_INLINE_LINETABLE;
5501 DirectiveKindMap[".cv_inline_site_id"] = DK_CV_INLINE_SITE_ID;
5502 DirectiveKindMap[".cv_def_range"] = DK_CV_DEF_RANGE;
5503 DirectiveKindMap[".cv_string"] = DK_CV_STRING;
5504 DirectiveKindMap[".cv_stringtable"] = DK_CV_STRINGTABLE;
5505 DirectiveKindMap[".cv_filechecksums"] = DK_CV_FILECHECKSUMS;
5506 DirectiveKindMap[".cv_filechecksumoffset"] = DK_CV_FILECHECKSUM_OFFSET;
5507 DirectiveKindMap[".cv_fpo_data"] = DK_CV_FPO_DATA;
5508 DirectiveKindMap[".sleb128"] = DK_SLEB128;
5509 DirectiveKindMap[".uleb128"] = DK_ULEB128;
5510 DirectiveKindMap[".cfi_sections"] = DK_CFI_SECTIONS;
5511 DirectiveKindMap[".cfi_startproc"] = DK_CFI_STARTPROC;
5512 DirectiveKindMap[".cfi_endproc"] = DK_CFI_ENDPROC;
5513 DirectiveKindMap[".cfi_def_cfa"] = DK_CFI_DEF_CFA;
5514 DirectiveKindMap[".cfi_def_cfa_offset"] = DK_CFI_DEF_CFA_OFFSET;
5515 DirectiveKindMap[".cfi_adjust_cfa_offset"] = DK_CFI_ADJUST_CFA_OFFSET;
5516 DirectiveKindMap[".cfi_def_cfa_register"] = DK_CFI_DEF_CFA_REGISTER;
5517 DirectiveKindMap[".cfi_llvm_def_aspace_cfa"] = DK_CFI_LLVM_DEF_ASPACE_CFA;
5518 DirectiveKindMap[".cfi_offset"] = DK_CFI_OFFSET;
5519 DirectiveKindMap[".cfi_rel_offset"] = DK_CFI_REL_OFFSET;
5520 DirectiveKindMap[".cfi_personality"] = DK_CFI_PERSONALITY;
5521 DirectiveKindMap[".cfi_lsda"] = DK_CFI_LSDA;
5522 DirectiveKindMap[".cfi_remember_state"] = DK_CFI_REMEMBER_STATE;
5523 DirectiveKindMap[".cfi_restore_state"] = DK_CFI_RESTORE_STATE;
5524 DirectiveKindMap[".cfi_same_value"] = DK_CFI_SAME_VALUE;
5525 DirectiveKindMap[".cfi_restore"] = DK_CFI_RESTORE;
5526 DirectiveKindMap[".cfi_escape"] = DK_CFI_ESCAPE;
5527 DirectiveKindMap[".cfi_return_column"] = DK_CFI_RETURN_COLUMN;
5528 DirectiveKindMap[".cfi_signal_frame"] = DK_CFI_SIGNAL_FRAME;
5529 DirectiveKindMap[".cfi_undefined"] = DK_CFI_UNDEFINED;
5530 DirectiveKindMap[".cfi_register"] = DK_CFI_REGISTER;
5531 DirectiveKindMap[".cfi_window_save"] = DK_CFI_WINDOW_SAVE;
5532 DirectiveKindMap[".cfi_b_key_frame"] = DK_CFI_B_KEY_FRAME;
5533 DirectiveKindMap[".macros_on"] = DK_MACROS_ON;
5534 DirectiveKindMap[".macros_off"] = DK_MACROS_OFF;
5535 DirectiveKindMap[".macro"] = DK_MACRO;
5536 DirectiveKindMap[".exitm"] = DK_EXITM;
5537 DirectiveKindMap[".endm"] = DK_ENDM;
5538 DirectiveKindMap[".endmacro"] = DK_ENDMACRO;
5539 DirectiveKindMap[".purgem"] = DK_PURGEM;
5540 DirectiveKindMap[".err"] = DK_ERR;
5541 DirectiveKindMap[".error"] = DK_ERROR;
5542 DirectiveKindMap[".warning"] = DK_WARNING;
5543 DirectiveKindMap[".altmacro"] = DK_ALTMACRO;
5544 DirectiveKindMap[".noaltmacro"] = DK_NOALTMACRO;
5545 DirectiveKindMap[".reloc"] = DK_RELOC;
5546 DirectiveKindMap[".dc"] = DK_DC;
5547 DirectiveKindMap[".dc.a"] = DK_DC_A;
5548 DirectiveKindMap[".dc.b"] = DK_DC_B;
5549 DirectiveKindMap[".dc.d"] = DK_DC_D;
5550 DirectiveKindMap[".dc.l"] = DK_DC_L;
5551 DirectiveKindMap[".dc.s"] = DK_DC_S;
5552 DirectiveKindMap[".dc.w"] = DK_DC_W;
5553 DirectiveKindMap[".dc.x"] = DK_DC_X;
5554 DirectiveKindMap[".dcb"] = DK_DCB;
5555 DirectiveKindMap[".dcb.b"] = DK_DCB_B;
5556 DirectiveKindMap[".dcb.d"] = DK_DCB_D;
5557 DirectiveKindMap[".dcb.l"] = DK_DCB_L;
5558 DirectiveKindMap[".dcb.s"] = DK_DCB_S;
5559 DirectiveKindMap[".dcb.w"] = DK_DCB_W;
5560 DirectiveKindMap[".dcb.x"] = DK_DCB_X;
5561 DirectiveKindMap[".ds"] = DK_DS;
5562 DirectiveKindMap[".ds.b"] = DK_DS_B;
5563 DirectiveKindMap[".ds.d"] = DK_DS_D;
5564 DirectiveKindMap[".ds.l"] = DK_DS_L;
5565 DirectiveKindMap[".ds.p"] = DK_DS_P;
5566 DirectiveKindMap[".ds.s"] = DK_DS_S;
5567 DirectiveKindMap[".ds.w"] = DK_DS_W;
5568 DirectiveKindMap[".ds.x"] = DK_DS_X;
5569 DirectiveKindMap[".print"] = DK_PRINT;
5570 DirectiveKindMap[".addrsig"] = DK_ADDRSIG;
5571 DirectiveKindMap[".addrsig_sym"] = DK_ADDRSIG_SYM;
5572 DirectiveKindMap[".pseudoprobe"] = DK_PSEUDO_PROBE;
5573 DirectiveKindMap[".lto_discard"] = DK_LTO_DISCARD;
5574}
5575
5576MCAsmMacro *AsmParser::parseMacroLikeBody(SMLoc DirectiveLoc) {
5577 AsmToken EndToken, StartToken = getTok();
5578
5579 unsigned NestLevel = 0;
5580 while (true) {
5581 // Check whether we have reached the end of the file.
5582 if (getLexer().is(AsmToken::Eof)) {
5583 printError(DirectiveLoc, "no matching '.endr' in definition");
5584 return nullptr;
5585 }
5586
5587 if (Lexer.is(AsmToken::Identifier) &&
5588 (getTok().getIdentifier() == ".rep" ||
5589 getTok().getIdentifier() == ".rept" ||
5590 getTok().getIdentifier() == ".irp" ||
5591 getTok().getIdentifier() == ".irpc")) {
5592 ++NestLevel;
5593 }
5594
5595 // Otherwise, check whether we have reached the .endr.
5596 if (Lexer.is(AsmToken::Identifier) && getTok().getIdentifier() == ".endr") {
5597 if (NestLevel == 0) {
5598 EndToken = getTok();
5599 Lex();
5600 if (Lexer.isNot(AsmToken::EndOfStatement)) {
5601 printError(getTok().getLoc(),
5602 "unexpected token in '.endr' directive");
5603 return nullptr;
5604 }
5605 break;
5606 }
5607 --NestLevel;
5608 }
5609
5610 // Otherwise, scan till the end of the statement.
5611 eatToEndOfStatement();
5612 }
5613
5614 const char *BodyStart = StartToken.getLoc().getPointer();
5615 const char *BodyEnd = EndToken.getLoc().getPointer();
5616 StringRef Body = StringRef(BodyStart, BodyEnd - BodyStart);
5617
5618 // We Are Anonymous.
5619 MacroLikeBodies.emplace_back(StringRef(), Body, MCAsmMacroParameters());
5620 return &MacroLikeBodies.back();
5621}
5622
5623void AsmParser::instantiateMacroLikeBody(MCAsmMacro *M, SMLoc DirectiveLoc,
5624 raw_svector_ostream &OS) {
5625 OS << ".endr\n";
5626
5627 std::unique_ptr<MemoryBuffer> Instantiation =
5628 MemoryBuffer::getMemBufferCopy(OS.str(), "<instantiation>");
5629
5630 // Create the macro instantiation object and add to the current macro
5631 // instantiation stack.
5632 MacroInstantiation *MI = new MacroInstantiation{
5633 DirectiveLoc, CurBuffer, getTok().getLoc(), TheCondStack.size()};
5634 ActiveMacros.push_back(MI);
5635
5636 // Jump to the macro instantiation and prime the lexer.
5637 CurBuffer = SrcMgr.AddNewSourceBuffer(std::move(Instantiation), SMLoc());
5638 Lexer.setBuffer(SrcMgr.getMemoryBuffer(CurBuffer)->getBuffer());
5639 Lex();
5640}
5641
5642/// parseDirectiveRept
5643/// ::= .rep | .rept count
5644bool AsmParser::parseDirectiveRept(SMLoc DirectiveLoc, StringRef Dir) {
5645 const MCExpr *CountExpr;
5646 SMLoc CountLoc = getTok().getLoc();
5647 if (parseExpression(CountExpr))
5648 return true;
5649
5650 int64_t Count;
5651 if (!CountExpr->evaluateAsAbsolute(Count, getStreamer().getAssemblerPtr())) {
5652 return Error(CountLoc, "unexpected token in '" + Dir + "' directive");
5653 }
5654
5655 if (check(Count < 0, CountLoc, "Count is negative") || parseEOL())
5656 return true;
5657
5658 // Lex the rept definition.
5659 MCAsmMacro *M = parseMacroLikeBody(DirectiveLoc);
5660 if (!M)
5661 return true;
5662
5663 // Macro instantiation is lexical, unfortunately. We construct a new buffer
5664 // to hold the macro body with substitutions.
5665 SmallString<256> Buf;
5666 raw_svector_ostream OS(Buf);
5667 while (Count--) {
5668 // Note that the AtPseudoVariable is disabled for instantiations of .rep(t).
5669 if (expandMacro(OS, M->Body, None, None, false, getTok().getLoc()))
5670 return true;
5671 }
5672 instantiateMacroLikeBody(M, DirectiveLoc, OS);
5673
5674 return false;
5675}
5676
5677/// parseDirectiveIrp
5678/// ::= .irp symbol,values
5679bool AsmParser::parseDirectiveIrp(SMLoc DirectiveLoc) {
5680 MCAsmMacroParameter Parameter;
5681 MCAsmMacroArguments A;
5682 if (check(parseIdentifier(Parameter.Name),
5683 "expected identifier in '.irp' directive") ||
5684 parseComma() || parseMacroArguments(nullptr, A) || parseEOL())
5685 return true;
5686
5687 // Lex the irp definition.
5688 MCAsmMacro *M = parseMacroLikeBody(DirectiveLoc);
5689 if (!M)
5690 return true;
5691
5692 // Macro instantiation is lexical, unfortunately. We construct a new buffer
5693 // to hold the macro body with substitutions.
5694 SmallString<256> Buf;
5695 raw_svector_ostream OS(Buf);
5696
5697 for (const MCAsmMacroArgument &Arg : A) {
5698 // Note that the AtPseudoVariable is enabled for instantiations of .irp.
5699 // This is undocumented, but GAS seems to support it.
5700 if (expandMacro(OS, M->Body, Parameter, Arg, true, getTok().getLoc()))
5701 return true;
5702 }
5703
5704 instantiateMacroLikeBody(M, DirectiveLoc, OS);
5705
5706 return false;
5707}
5708
5709/// parseDirectiveIrpc
5710/// ::= .irpc symbol,values
5711bool AsmParser::parseDirectiveIrpc(SMLoc DirectiveLoc) {
5712 MCAsmMacroParameter Parameter;
5713 MCAsmMacroArguments A;
5714
5715 if (check(parseIdentifier(Parameter.Name),
5716 "expected identifier in '.irpc' directive") ||
5717 parseComma() || parseMacroArguments(nullptr, A))
5718 return true;
5719
5720 if (A.size() != 1 || A.front().size() != 1)
5721 return TokError("unexpected token in '.irpc' directive");
5722 if (parseEOL())
5723 return true;
5724
5725 // Lex the irpc definition.
5726 MCAsmMacro *M = parseMacroLikeBody(DirectiveLoc);
5727 if (!M)
5728 return true;
5729
5730 // Macro instantiation is lexical, unfortunately. We construct a new buffer
5731 // to hold the macro body with substitutions.
5732 SmallString<256> Buf;
5733 raw_svector_ostream OS(Buf);
5734
5735 StringRef Values = A.front().front().getString();
5736 for (std::size_t I = 0, End = Values.size(); I != End; ++I) {
5737 MCAsmMacroArgument Arg;
5738 Arg.emplace_back(AsmToken::Identifier, Values.slice(I, I + 1));
5739
5740 // Note that the AtPseudoVariable is enabled for instantiations of .irpc.
5741 // This is undocumented, but GAS seems to support it.
5742 if (expandMacro(OS, M->Body, Parameter, Arg, true, getTok().getLoc()))
5743 return true;
5744 }
5745
5746 instantiateMacroLikeBody(M, DirectiveLoc, OS);
5747
5748 return false;
5749}
5750
5751bool AsmParser::parseDirectiveEndr(SMLoc DirectiveLoc) {
5752 if (ActiveMacros.empty())
5753 return TokError("unmatched '.endr' directive");
5754
5755 // The only .repl that should get here are the ones created by
5756 // instantiateMacroLikeBody.
5757 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~++20210621111111+acefe0eaaf82/llvm/lib/MC/MCParser/AsmParser.cpp"
, 5757, __extension__ __PRETTY_FUNCTION__))
;
5758
5759 handleMacroExit();
5760 return false;
5761}
5762
5763bool AsmParser::parseDirectiveMSEmit(SMLoc IDLoc, ParseStatementInfo &Info,
5764 size_t Len) {
5765 const MCExpr *Value;
5766 SMLoc ExprLoc = getLexer().getLoc();
5767 if (parseExpression(Value))
5768 return true;
5769 const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Value);
5770 if (!MCE)
5771 return Error(ExprLoc, "unexpected expression in _emit");
5772 uint64_t IntValue = MCE->getValue();
5773 if (!isUInt<8>(IntValue) && !isInt<8>(IntValue))
5774 return Error(ExprLoc, "literal value out of range for directive");
5775
5776 Info.AsmRewrites->emplace_back(AOK_Emit, IDLoc, Len);
5777 return false;
5778}
5779
5780bool AsmParser::parseDirectiveMSAlign(SMLoc IDLoc, ParseStatementInfo &Info) {
5781 const MCExpr *Value;
5782 SMLoc ExprLoc = getLexer().getLoc();
5783 if (parseExpression(Value))
5784 return true;
5785 const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Value);
5786 if (!MCE)
5787 return Error(ExprLoc, "unexpected expression in align");
5788 uint64_t IntValue = MCE->getValue();
5789 if (!isPowerOf2_64(IntValue))
5790 return Error(ExprLoc, "literal value not a power of two greater then zero");
5791
5792 Info.AsmRewrites->emplace_back(AOK_Align, IDLoc, 5, Log2_64(IntValue));
5793 return false;
5794}
5795
5796bool AsmParser::parseDirectivePrint(SMLoc DirectiveLoc) {
5797 const AsmToken StrTok = getTok();
5798 Lex();
5799 if (StrTok.isNot(AsmToken::String) || StrTok.getString().front() != '"')
5800 return Error(DirectiveLoc, "expected double quoted string after .print");
5801 if (parseEOL())
5802 return true;
5803 llvm::outs() << StrTok.getStringContents() << '\n';
5804 return false;
5805}
5806
5807bool AsmParser::parseDirectiveAddrsig() {
5808 if (parseEOL())
5809 return true;
5810 getStreamer().emitAddrsig();
5811 return false;
5812}
5813
5814bool AsmParser::parseDirectiveAddrsigSym() {
5815 StringRef Name;
5816 if (check(parseIdentifier(Name), "expected identifier") || parseEOL())
5817 return true;
5818 MCSymbol *Sym = getContext().getOrCreateSymbol(Name);
5819 getStreamer().emitAddrsigSym(Sym);
5820 return false;
5821}
5822
5823bool AsmParser::parseDirectivePseudoProbe() {
5824 int64_t Guid;
30
'Guid' declared without an initial value
5825 int64_t Index;
5826 int64_t Type;
5827 int64_t Attr;
5828
5829 if (getLexer().is(AsmToken::Integer)) {
31
Calling 'MCAsmLexer::is'
37
Returning from 'MCAsmLexer::is'
38
Taking false branch
5830 if (parseIntToken(Guid, "unexpected token in '.pseudoprobe' directive"))
5831 return true;
5832 }
5833
5834 if (getLexer().is(AsmToken::Integer)) {
39
Calling 'MCAsmLexer::is'
45
Returning from 'MCAsmLexer::is'
46
Taking false branch
5835 if (parseIntToken(Index, "unexpected token in '.pseudoprobe' directive"))
5836 return true;
5837 }
5838
5839 if (getLexer().is(AsmToken::Integer)) {
47
Calling 'MCAsmLexer::is'
53
Returning from 'MCAsmLexer::is'
54
Taking false branch
5840 if (parseIntToken(Type, "unexpected token in '.pseudoprobe' directive"))
5841 return true;
5842 }
5843
5844 if (getLexer().is(AsmToken::Integer)) {
55
Calling 'MCAsmLexer::is'
61
Returning from 'MCAsmLexer::is'
62
Taking false branch
5845 if (parseIntToken(Attr, "unexpected token in '.pseudoprobe' directive"))
5846 return true;
5847 }
5848
5849 // Parse inline stack like @ GUID:11:12 @ GUID:1:11 @ GUID:3:21
5850 MCPseudoProbeInlineStack InlineStack;
5851
5852 while (getLexer().is(AsmToken::At)) {
63
Calling 'MCAsmLexer::is'
69
Returning from 'MCAsmLexer::is'
70
Loop condition is false. Execution continues on line 5878
5853 // eat @
5854 Lex();
5855
5856 int64_t CallerGuid = 0;
5857 if (getLexer().is(AsmToken::Integer)) {
5858 if (parseIntToken(CallerGuid,
5859 "unexpected token in '.pseudoprobe' directive"))
5860 return true;
5861 }
5862
5863 // eat colon
5864 if (getLexer().is(AsmToken::Colon))
5865 Lex();
5866
5867 int64_t CallerProbeId = 0;
5868 if (getLexer().is(AsmToken::Integer)) {
5869 if (parseIntToken(CallerProbeId,
5870 "unexpected token in '.pseudoprobe' directive"))
5871 return true;
5872 }
5873
5874 InlineSite Site(CallerGuid, CallerProbeId);
5875 InlineStack.push_back(Site);
5876 }
5877
5878 if (parseEOL())
71
Assuming the condition is false
72
Taking false branch
5879 return true;
5880
5881 getStreamer().emitPseudoProbe(Guid, Index, Type, Attr, InlineStack);
73
1st function call argument is an uninitialized value
5882 return false;
5883}
5884
5885/// parseDirectiveLTODiscard
5886/// ::= ".lto_discard" [ identifier ( , identifier )* ]
5887/// The LTO library emits this directive to discard non-prevailing symbols.
5888/// We ignore symbol assignments and attribute changes for the specified
5889/// symbols.
5890bool AsmParser::parseDirectiveLTODiscard() {
5891 auto ParseOp = [&]() -> bool {
5892 StringRef Name;
5893 SMLoc Loc = getTok().getLoc();
5894 if (parseIdentifier(Name))
5895 return Error(Loc, "expected identifier");
5896 LTODiscardSymbols.insert(Name);
5897 return false;
5898 };
5899
5900 LTODiscardSymbols.clear();
5901 return parseMany(ParseOp);
5902}
5903
5904// We are comparing pointers, but the pointers are relative to a single string.
5905// Thus, this should always be deterministic.
5906static int rewritesSort(const AsmRewrite *AsmRewriteA,
5907 const AsmRewrite *AsmRewriteB) {
5908 if (AsmRewriteA->Loc.getPointer() < AsmRewriteB->Loc.getPointer())
5909 return -1;
5910 if (AsmRewriteB->Loc.getPointer() < AsmRewriteA->Loc.getPointer())
5911 return 1;
5912
5913 // It's possible to have a SizeDirective, Imm/ImmPrefix and an Input/Output
5914 // rewrite to the same location. Make sure the SizeDirective rewrite is
5915 // performed first, then the Imm/ImmPrefix and finally the Input/Output. This
5916 // ensures the sort algorithm is stable.
5917 if (AsmRewritePrecedence[AsmRewriteA->Kind] >
5918 AsmRewritePrecedence[AsmRewriteB->Kind])
5919 return -1;
5920
5921 if (AsmRewritePrecedence[AsmRewriteA->Kind] <
5922 AsmRewritePrecedence[AsmRewriteB->Kind])
5923 return 1;
5924 llvm_unreachable("Unstable rewrite sort.")::llvm::llvm_unreachable_internal("Unstable rewrite sort.", "/build/llvm-toolchain-snapshot-13~++20210621111111+acefe0eaaf82/llvm/lib/MC/MCParser/AsmParser.cpp"
, 5924)
;
5925}
5926
5927bool AsmParser::parseMSInlineAsm(
5928 void *AsmLoc, std::string &AsmString, unsigned &NumOutputs,
5929 unsigned &NumInputs, SmallVectorImpl<std::pair<void *, bool>> &OpDecls,
5930 SmallVectorImpl<std::string> &Constraints,
5931 SmallVectorImpl<std::string> &Clobbers, const MCInstrInfo *MII,
5932 const MCInstPrinter *IP, MCAsmParserSemaCallback &SI) {
5933 SmallVector<void *, 4> InputDecls;
5934 SmallVector<void *, 4> OutputDecls;
5935 SmallVector<bool, 4> InputDeclsAddressOf;
5936 SmallVector<bool, 4> OutputDeclsAddressOf;
5937 SmallVector<std::string, 4> InputConstraints;
5938 SmallVector<std::string, 4> OutputConstraints;
5939 SmallVector<unsigned, 4> ClobberRegs;
5940
5941 SmallVector<AsmRewrite, 4> AsmStrRewrites;
5942
5943 // Prime the lexer.
5944 Lex();
5945
5946 // While we have input, parse each statement.
5947 unsigned InputIdx = 0;
5948 unsigned OutputIdx = 0;
5949 while (getLexer().isNot(AsmToken::Eof)) {
5950 // Parse curly braces marking block start/end
5951 if (parseCurlyBlockScope(AsmStrRewrites))
5952 continue;
5953
5954 ParseStatementInfo Info(&AsmStrRewrites);
5955 bool StatementErr = parseStatement(Info, &SI);
5956
5957 if (StatementErr || Info.ParseError) {
5958 // Emit pending errors if any exist.
5959 printPendingErrors();
5960 return true;
5961 }
5962
5963 // No pending error should exist here.
5964 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~++20210621111111+acefe0eaaf82/llvm/lib/MC/MCParser/AsmParser.cpp"
, 5964, __extension__ __PRETTY_FUNCTION__))
;
5965
5966 if (Info.Opcode == ~0U)
5967 continue;
5968
5969 const MCInstrDesc &Desc = MII->get(Info.Opcode);
5970
5971 // Build the list of clobbers, outputs and inputs.
5972 for (unsigned i = 1, e = Info.ParsedOperands.size(); i != e; ++i) {
5973 MCParsedAsmOperand &Operand = *Info.ParsedOperands[i];
5974
5975 // Register operand.
5976 if (Operand.isReg() && !Operand.needAddressOf() &&
5977 !getTargetParser().OmitRegisterFromClobberLists(Operand.getReg())) {
5978 unsigned NumDefs = Desc.getNumDefs();
5979 // Clobber.
5980 if (NumDefs && Operand.getMCOperandNum() < NumDefs)
5981 ClobberRegs.push_back(Operand.getReg());
5982 continue;
5983 }
5984
5985 // Expr/Input or Output.
5986 StringRef SymName = Operand.getSymName();
5987 if (SymName.empty())
5988 continue;
5989
5990 void *OpDecl = Operand.getOpDecl();
5991 if (!OpDecl)
5992 continue;
5993
5994 StringRef Constraint = Operand.getConstraint();
5995 if (Operand.isImm()) {
5996 // Offset as immediate
5997 if (Operand.isOffsetOfLocal())
5998 Constraint = "r";
5999 else
6000 Constraint = "i";
6001 }
6002
6003 bool isOutput = (i == 1) && Desc.mayStore();
6004 SMLoc Start = SMLoc::getFromPointer(SymName.data());
6005 if (isOutput) {
6006 ++InputIdx;
6007 OutputDecls.push_back(OpDecl);
6008 OutputDeclsAddressOf.push_back(Operand.needAddressOf());
6009 OutputConstraints.push_back(("=" + Constraint).str());
6010 AsmStrRewrites.emplace_back(AOK_Output, Start, SymName.size());
6011 } else {
6012 InputDecls.push_back(OpDecl);
6013 InputDeclsAddressOf.push_back(Operand.needAddressOf());
6014 InputConstraints.push_back(Constraint.str());
6015 if (Desc.OpInfo[i - 1].isBranchTarget())
6016 AsmStrRewrites.emplace_back(AOK_CallInput, Start, SymName.size());
6017 else
6018 AsmStrRewrites.emplace_back(AOK_Input, Start, SymName.size());
6019 }
6020 }
6021
6022 // Consider implicit defs to be clobbers. Think of cpuid and push.
6023 ArrayRef<MCPhysReg> ImpDefs(Desc.getImplicitDefs(),
6024 Desc.getNumImplicitDefs());
6025 llvm::append_range(ClobberRegs, ImpDefs);
6026 }
6027
6028 // Set the number of Outputs and Inputs.
6029 NumOutputs = OutputDecls.size();
6030 NumInputs = InputDecls.size();
6031
6032 // Set the unique clobbers.
6033 array_pod_sort(ClobberRegs.begin(), ClobberRegs.end());
6034 ClobberRegs.erase(std::unique(ClobberRegs.begin(), ClobberRegs.end()),
6035 ClobberRegs.end());
6036 Clobbers.assign(ClobberRegs.size(), std::string());
6037 for (unsigned I = 0, E = ClobberRegs.size(); I != E; ++I) {
6038 raw_string_ostream OS(Clobbers[I]);
6039 IP->printRegName(OS, ClobberRegs[I]);
6040 }
6041
6042 // Merge the various outputs and inputs. Output are expected first.
6043 if (NumOutputs || NumInputs) {
6044 unsigned NumExprs = NumOutputs + NumInputs;
6045 OpDecls.resize(NumExprs);
6046 Constraints.resize(NumExprs);
6047 for (unsigned i = 0; i < NumOutputs; ++i) {
6048 OpDecls[i] = std::make_pair(OutputDecls[i], OutputDeclsAddressOf[i]);
6049 Constraints[i] = OutputConstraints[i];
6050 }
6051 for (unsigned i = 0, j = NumOutputs; i < NumInputs; ++i, ++j) {
6052 OpDecls[j] = std::make_pair(InputDecls[i], InputDeclsAddressOf[i]);
6053 Constraints[j] = InputConstraints[i];
6054 }
6055 }
6056
6057 // Build the IR assembly string.
6058 std::string AsmStringIR;
6059 raw_string_ostream OS(AsmStringIR);
6060 StringRef ASMString =
6061 SrcMgr.getMemoryBuffer(SrcMgr.getMainFileID())->getBuffer();
6062 const char *AsmStart = ASMString.begin();
6063 const char *AsmEnd = ASMString.end();
6064 array_pod_sort(AsmStrRewrites.begin(), AsmStrRewrites.end(), rewritesSort);
6065 for (auto it = AsmStrRewrites.begin(); it != AsmStrRewrites.end(); ++it) {
6066 const AsmRewrite &AR = *it;
6067 // Check if this has already been covered by another rewrite...
6068 if (AR.Done)
6069 continue;
6070 AsmRewriteKind Kind = AR.Kind;
6071
6072 const char *Loc = AR.Loc.getPointer();
6073 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~++20210621111111+acefe0eaaf82/llvm/lib/MC/MCParser/AsmParser.cpp"
, 6073, __extension__ __PRETTY_FUNCTION__))
;
6074
6075 // Emit everything up to the immediate/expression.
6076 if (unsigned Len = Loc - AsmStart)
6077 OS << StringRef(AsmStart, Len);
6078
6079 // Skip the original expression.
6080 if (Kind == AOK_Skip) {
6081 AsmStart = Loc + AR.Len;
6082 continue;
6083 }
6084
6085 unsigned AdditionalSkip = 0;
6086 // Rewrite expressions in $N notation.
6087 switch (Kind) {
6088 default:
6089 break;
6090 case AOK_IntelExpr:
6091 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~++20210621111111+acefe0eaaf82/llvm/lib/MC/MCParser/AsmParser.cpp"
, 6091, __extension__ __PRETTY_FUNCTION__))
;
6092 if (AR.IntelExp.NeedBracs)
6093 OS << "[";
6094 if (AR.IntelExp.hasBaseReg())
6095 OS << AR.IntelExp.BaseReg;
6096 if (AR.IntelExp.hasIndexReg())
6097 OS << (AR.IntelExp.hasBaseReg() ? " + " : "")
6098 << AR.IntelExp.IndexReg;
6099 if (AR.IntelExp.Scale > 1)
6100 OS << " * $$" << AR.IntelExp.Scale;
6101 if (AR.IntelExp.hasOffset()) {
6102 if (AR.IntelExp.hasRegs())
6103 OS << " + ";
6104 // Fuse this rewrite with a rewrite of the offset name, if present.
6105 StringRef OffsetName = AR.IntelExp.OffsetName;
6106 SMLoc OffsetLoc = SMLoc::getFromPointer(AR.IntelExp.OffsetName.data());
6107 size_t OffsetLen = OffsetName.size();
6108 auto rewrite_it = std::find_if(
6109 it, AsmStrRewrites.end(), [&](const AsmRewrite &FusingAR) {
6110 return FusingAR.Loc == OffsetLoc && FusingAR.Len == OffsetLen &&
6111 (FusingAR.Kind == AOK_Input ||
6112 FusingAR.Kind == AOK_CallInput);
6113 });
6114 if (rewrite_it == AsmStrRewrites.end()) {
6115 OS << "offset " << OffsetName;
6116 } else if (rewrite_it->Kind == AOK_CallInput) {
6117 OS << "${" << InputIdx++ << ":P}";
6118 rewrite_it->Done = true;
6119 } else {
6120 OS << '$' << InputIdx++;
6121 rewrite_it->Done = true;
6122 }
6123 }
6124 if (AR.IntelExp.Imm || AR.IntelExp.emitImm())
6125 OS << (AR.IntelExp.emitImm() ? "$$" : " + $$") << AR.IntelExp.Imm;
6126 if (AR.IntelExp.NeedBracs)
6127 OS << "]";
6128 break;
6129 case AOK_Label:
6130 OS << Ctx.getAsmInfo()->getPrivateLabelPrefix() << AR.Label;
6131 break;
6132 case AOK_Input:
6133 OS << '$' << InputIdx++;
6134 break;
6135 case AOK_CallInput:
6136 OS << "${" << InputIdx++ << ":P}";
613