Bug Summary

File:llvm/lib/MC/MCParser/AsmParser.cpp
Warning:line 5832, column 3
1st function call argument is an uninitialized value

Annotated Source Code

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clang -cc1 -cc1 -triple x86_64-pc-linux-gnu -analyze -disable-free -disable-llvm-verifier -discard-value-names -main-file-name AsmParser.cpp -analyzer-store=region -analyzer-opt-analyze-nested-blocks -analyzer-checker=core -analyzer-checker=apiModeling -analyzer-checker=unix -analyzer-checker=deadcode -analyzer-checker=cplusplus -analyzer-checker=security.insecureAPI.UncheckedReturn -analyzer-checker=security.insecureAPI.getpw -analyzer-checker=security.insecureAPI.gets -analyzer-checker=security.insecureAPI.mktemp -analyzer-checker=security.insecureAPI.mkstemp -analyzer-checker=security.insecureAPI.vfork -analyzer-checker=nullability.NullPassedToNonnull -analyzer-checker=nullability.NullReturnedFromNonnull -analyzer-output plist -w -setup-static-analyzer -analyzer-config-compatibility-mode=true -mrelocation-model pic -pic-level 2 -fhalf-no-semantic-interposition -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~++20210405022414+5f57793c4fe4/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~++20210405022414+5f57793c4fe4/build-llvm/lib/MC/MCParser -I /build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/llvm/lib/MC/MCParser -I /build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/build-llvm/include -I /build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/llvm/include -U NDEBUG -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/c++/6.3.0 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/x86_64-linux-gnu/c++/6.3.0 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/c++/6.3.0/backward -internal-isystem /usr/local/include -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/6.3.0/../../../../x86_64-linux-gnu/include -internal-isystem /usr/lib/llvm-13/lib/clang/13.0.0/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-comment -std=c++14 -fdeprecated-macro -fdebug-compilation-dir=/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/build-llvm/lib/MC/MCParser -fdebug-prefix-map=/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4=. -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-2021-04-05-202135-9119-1 -x c++ /build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/llvm/lib/MC/MCParser/AsmParser.cpp

/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/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
189public:
190 AsmParser(SourceMgr &SM, MCContext &Ctx, MCStreamer &Out,
191 const MCAsmInfo &MAI, unsigned CB);
192 AsmParser(const AsmParser &) = delete;
193 AsmParser &operator=(const AsmParser &) = delete;
194 ~AsmParser() override;
195
196 bool Run(bool NoInitialTextSection, bool NoFinalize = false) override;
197
198 void addDirectiveHandler(StringRef Directive,
199 ExtensionDirectiveHandler Handler) override {
200 ExtensionDirectiveMap[Directive] = Handler;
201 }
202
203 void addAliasForDirective(StringRef Directive, StringRef Alias) override {
204 DirectiveKindMap[Directive.lower()] = DirectiveKindMap[Alias.lower()];
205 }
206
207 /// @name MCAsmParser Interface
208 /// {
209
210 SourceMgr &getSourceManager() override { return SrcMgr; }
211 MCAsmLexer &getLexer() override { return Lexer; }
212 MCContext &getContext() override { return Ctx; }
213 MCStreamer &getStreamer() override { return Out; }
214
215 CodeViewContext &getCVContext() { return Ctx.getCVContext(); }
216
217 unsigned getAssemblerDialect() override {
218 if (AssemblerDialect == ~0U)
219 return MAI.getAssemblerDialect();
220 else
221 return AssemblerDialect;
222 }
223 void setAssemblerDialect(unsigned i) override {
224 AssemblerDialect = i;
225 }
226
227 void Note(SMLoc L, const Twine &Msg, SMRange Range = None) override;
228 bool Warning(SMLoc L, const Twine &Msg, SMRange Range = None) override;
229 bool printError(SMLoc L, const Twine &Msg, SMRange Range = None) override;
230
231 const AsmToken &Lex() override;
232
233 void setParsingMSInlineAsm(bool V) override {
234 ParsingMSInlineAsm = V;
235 // When parsing MS inline asm, we must lex 0b1101 and 0ABCH as binary and
236 // hex integer literals.
237 Lexer.setLexMasmIntegers(V);
238 }
239 bool isParsingMSInlineAsm() override { return ParsingMSInlineAsm; }
240
241 bool discardLTOSymbol(StringRef Name) const override {
242 return LTODiscardSymbols.contains(Name);
243 }
244
245 bool parseMSInlineAsm(void *AsmLoc, std::string &AsmString,
246 unsigned &NumOutputs, unsigned &NumInputs,
247 SmallVectorImpl<std::pair<void *,bool>> &OpDecls,
248 SmallVectorImpl<std::string> &Constraints,
249 SmallVectorImpl<std::string> &Clobbers,
250 const MCInstrInfo *MII, const MCInstPrinter *IP,
251 MCAsmParserSemaCallback &SI) override;
252
253 bool parseExpression(const MCExpr *&Res);
254 bool parseExpression(const MCExpr *&Res, SMLoc &EndLoc) override;
255 bool parsePrimaryExpr(const MCExpr *&Res, SMLoc &EndLoc,
256 AsmTypeInfo *TypeInfo) override;
257 bool parseParenExpression(const MCExpr *&Res, SMLoc &EndLoc) override;
258 bool parseParenExprOfDepth(unsigned ParenDepth, const MCExpr *&Res,
259 SMLoc &EndLoc) override;
260 bool parseAbsoluteExpression(int64_t &Res) override;
261
262 /// Parse a floating point expression using the float \p Semantics
263 /// and set \p Res to the value.
264 bool parseRealValue(const fltSemantics &Semantics, APInt &Res);
265
266 /// Parse an identifier or string (as a quoted identifier)
267 /// and set \p Res to the identifier contents.
268 bool parseIdentifier(StringRef &Res) override;
269 void eatToEndOfStatement() override;
270
271 bool checkForValidSection() override;
272
273 /// }
274
275private:
276 bool parseStatement(ParseStatementInfo &Info,
277 MCAsmParserSemaCallback *SI);
278 bool parseCurlyBlockScope(SmallVectorImpl<AsmRewrite>& AsmStrRewrites);
279 bool parseCppHashLineFilenameComment(SMLoc L, bool SaveLocInfo = true);
280
281 void checkForBadMacro(SMLoc DirectiveLoc, StringRef Name, StringRef Body,
282 ArrayRef<MCAsmMacroParameter> Parameters);
283 bool expandMacro(raw_svector_ostream &OS, StringRef Body,
284 ArrayRef<MCAsmMacroParameter> Parameters,
285 ArrayRef<MCAsmMacroArgument> A, bool EnableAtPseudoVariable,
286 SMLoc L);
287
288 /// Are macros enabled in the parser?
289 bool areMacrosEnabled() {return MacrosEnabledFlag;}
290
291 /// Control a flag in the parser that enables or disables macros.
292 void setMacrosEnabled(bool Flag) {MacrosEnabledFlag = Flag;}
293
294 /// Are we inside a macro instantiation?
295 bool isInsideMacroInstantiation() {return !ActiveMacros.empty();}
296
297 /// Handle entry to macro instantiation.
298 ///
299 /// \param M The macro.
300 /// \param NameLoc Instantiation location.
301 bool handleMacroEntry(const MCAsmMacro *M, SMLoc NameLoc);
302
303 /// Handle exit from macro instantiation.
304 void handleMacroExit();
305
306 /// Extract AsmTokens for a macro argument.
307 bool parseMacroArgument(MCAsmMacroArgument &MA, bool Vararg);
308
309 /// Parse all macro arguments for a given macro.
310 bool parseMacroArguments(const MCAsmMacro *M, MCAsmMacroArguments &A);
311
312 void printMacroInstantiations();
313 void printMessage(SMLoc Loc, SourceMgr::DiagKind Kind, const Twine &Msg,
314 SMRange Range = None) const {
315 ArrayRef<SMRange> Ranges(Range);
316 SrcMgr.PrintMessage(Loc, Kind, Msg, Ranges);
317 }
318 static void DiagHandler(const SMDiagnostic &Diag, void *Context);
319
320 /// Should we emit DWARF describing this assembler source? (Returns false if
321 /// the source has .file directives, which means we don't want to generate
322 /// info describing the assembler source itself.)
323 bool enabledGenDwarfForAssembly();
324
325 /// Enter the specified file. This returns true on failure.
326 bool enterIncludeFile(const std::string &Filename);
327
328 /// Process the specified file for the .incbin directive.
329 /// This returns true on failure.
330 bool processIncbinFile(const std::string &Filename, int64_t Skip = 0,
331 const MCExpr *Count = nullptr, SMLoc Loc = SMLoc());
332
333 /// Reset the current lexer position to that given by \p Loc. The
334 /// current token is not set; clients should ensure Lex() is called
335 /// subsequently.
336 ///
337 /// \param InBuffer If not 0, should be the known buffer id that contains the
338 /// location.
339 void jumpToLoc(SMLoc Loc, unsigned InBuffer = 0);
340
341 /// Parse up to the end of statement and a return the contents from the
342 /// current token until the end of the statement; the current token on exit
343 /// will be either the EndOfStatement or EOF.
344 StringRef parseStringToEndOfStatement() override;
345
346 /// Parse until the end of a statement or a comma is encountered,
347 /// return the contents from the current token up to the end or comma.
348 StringRef parseStringToComma();
349
350 bool parseAssignment(StringRef Name, bool allow_redef,
351 bool NoDeadStrip = false);
352
353 unsigned getBinOpPrecedence(AsmToken::TokenKind K,
354 MCBinaryExpr::Opcode &Kind);
355
356 bool parseBinOpRHS(unsigned Precedence, const MCExpr *&Res, SMLoc &EndLoc);
357 bool parseParenExpr(const MCExpr *&Res, SMLoc &EndLoc);
358 bool parseBracketExpr(const MCExpr *&Res, SMLoc &EndLoc);
359
360 bool parseRegisterOrRegisterNumber(int64_t &Register, SMLoc DirectiveLoc);
361
362 bool parseCVFunctionId(int64_t &FunctionId, StringRef DirectiveName);
363 bool parseCVFileId(int64_t &FileId, StringRef DirectiveName);
364
365 // Generic (target and platform independent) directive parsing.
366 enum DirectiveKind {
367 DK_NO_DIRECTIVE, // Placeholder
368 DK_SET,
369 DK_EQU,
370 DK_EQUIV,
371 DK_ASCII,
372 DK_ASCIZ,
373 DK_STRING,
374 DK_BYTE,
375 DK_SHORT,
376 DK_RELOC,
377 DK_VALUE,
378 DK_2BYTE,
379 DK_LONG,
380 DK_INT,
381 DK_4BYTE,
382 DK_QUAD,
383 DK_8BYTE,
384 DK_OCTA,
385 DK_DC,
386 DK_DC_A,
387 DK_DC_B,
388 DK_DC_D,
389 DK_DC_L,
390 DK_DC_S,
391 DK_DC_W,
392 DK_DC_X,
393 DK_DCB,
394 DK_DCB_B,
395 DK_DCB_D,
396 DK_DCB_L,
397 DK_DCB_S,
398 DK_DCB_W,
399 DK_DCB_X,
400 DK_DS,
401 DK_DS_B,
402 DK_DS_D,
403 DK_DS_L,
404 DK_DS_P,
405 DK_DS_S,
406 DK_DS_W,
407 DK_DS_X,
408 DK_SINGLE,
409 DK_FLOAT,
410 DK_DOUBLE,
411 DK_ALIGN,
412 DK_ALIGN32,
413 DK_BALIGN,
414 DK_BALIGNW,
415 DK_BALIGNL,
416 DK_P2ALIGN,
417 DK_P2ALIGNW,
418 DK_P2ALIGNL,
419 DK_ORG,
420 DK_FILL,
421 DK_ENDR,
422 DK_BUNDLE_ALIGN_MODE,
423 DK_BUNDLE_LOCK,
424 DK_BUNDLE_UNLOCK,
425 DK_ZERO,
426 DK_EXTERN,
427 DK_GLOBL,
428 DK_GLOBAL,
429 DK_LAZY_REFERENCE,
430 DK_NO_DEAD_STRIP,
431 DK_SYMBOL_RESOLVER,
432 DK_PRIVATE_EXTERN,
433 DK_REFERENCE,
434 DK_WEAK_DEFINITION,
435 DK_WEAK_REFERENCE,
436 DK_WEAK_DEF_CAN_BE_HIDDEN,
437 DK_COLD,
438 DK_COMM,
439 DK_COMMON,
440 DK_LCOMM,
441 DK_ABORT,
442 DK_INCLUDE,
443 DK_INCBIN,
444 DK_CODE16,
445 DK_CODE16GCC,
446 DK_REPT,
447 DK_IRP,
448 DK_IRPC,
449 DK_IF,
450 DK_IFEQ,
451 DK_IFGE,
452 DK_IFGT,
453 DK_IFLE,
454 DK_IFLT,
455 DK_IFNE,
456 DK_IFB,
457 DK_IFNB,
458 DK_IFC,
459 DK_IFEQS,
460 DK_IFNC,
461 DK_IFNES,
462 DK_IFDEF,
463 DK_IFNDEF,
464 DK_IFNOTDEF,
465 DK_ELSEIF,
466 DK_ELSE,
467 DK_ENDIF,
468 DK_SPACE,
469 DK_SKIP,
470 DK_FILE,
471 DK_LINE,
472 DK_LOC,
473 DK_STABS,
474 DK_CV_FILE,
475 DK_CV_FUNC_ID,
476 DK_CV_INLINE_SITE_ID,
477 DK_CV_LOC,
478 DK_CV_LINETABLE,
479 DK_CV_INLINE_LINETABLE,
480 DK_CV_DEF_RANGE,
481 DK_CV_STRINGTABLE,
482 DK_CV_STRING,
483 DK_CV_FILECHECKSUMS,
484 DK_CV_FILECHECKSUM_OFFSET,
485 DK_CV_FPO_DATA,
486 DK_CFI_SECTIONS,
487 DK_CFI_STARTPROC,
488 DK_CFI_ENDPROC,
489 DK_CFI_DEF_CFA,
490 DK_CFI_DEF_CFA_OFFSET,
491 DK_CFI_ADJUST_CFA_OFFSET,
492 DK_CFI_DEF_CFA_REGISTER,
493 DK_CFI_OFFSET,
494 DK_CFI_REL_OFFSET,
495 DK_CFI_PERSONALITY,
496 DK_CFI_LSDA,
497 DK_CFI_REMEMBER_STATE,
498 DK_CFI_RESTORE_STATE,
499 DK_CFI_SAME_VALUE,
500 DK_CFI_RESTORE,
501 DK_CFI_ESCAPE,
502 DK_CFI_RETURN_COLUMN,
503 DK_CFI_SIGNAL_FRAME,
504 DK_CFI_UNDEFINED,
505 DK_CFI_REGISTER,
506 DK_CFI_WINDOW_SAVE,
507 DK_CFI_B_KEY_FRAME,
508 DK_MACROS_ON,
509 DK_MACROS_OFF,
510 DK_ALTMACRO,
511 DK_NOALTMACRO,
512 DK_MACRO,
513 DK_EXITM,
514 DK_ENDM,
515 DK_ENDMACRO,
516 DK_PURGEM,
517 DK_SLEB128,
518 DK_ULEB128,
519 DK_ERR,
520 DK_ERROR,
521 DK_WARNING,
522 DK_PRINT,
523 DK_ADDRSIG,
524 DK_ADDRSIG_SYM,
525 DK_PSEUDO_PROBE,
526 DK_LTO_DISCARD,
527 DK_END
528 };
529
530 /// Maps directive name --> DirectiveKind enum, for
531 /// directives parsed by this class.
532 StringMap<DirectiveKind> DirectiveKindMap;
533
534 // Codeview def_range type parsing.
535 enum CVDefRangeType {
536 CVDR_DEFRANGE = 0, // Placeholder
537 CVDR_DEFRANGE_REGISTER,
538 CVDR_DEFRANGE_FRAMEPOINTER_REL,
539 CVDR_DEFRANGE_SUBFIELD_REGISTER,
540 CVDR_DEFRANGE_REGISTER_REL
541 };
542
543 /// Maps Codeview def_range types --> CVDefRangeType enum, for
544 /// Codeview def_range types parsed by this class.
545 StringMap<CVDefRangeType> CVDefRangeTypeMap;
546
547 // ".ascii", ".asciz", ".string"
548 bool parseDirectiveAscii(StringRef IDVal, bool ZeroTerminated);
549 bool parseDirectiveReloc(SMLoc DirectiveLoc); // ".reloc"
550 bool parseDirectiveValue(StringRef IDVal,
551 unsigned Size); // ".byte", ".long", ...
552 bool parseDirectiveOctaValue(StringRef IDVal); // ".octa", ...
553 bool parseDirectiveRealValue(StringRef IDVal,
554 const fltSemantics &); // ".single", ...
555 bool parseDirectiveFill(); // ".fill"
556 bool parseDirectiveZero(); // ".zero"
557 // ".set", ".equ", ".equiv"
558 bool parseDirectiveSet(StringRef IDVal, bool allow_redef);
559 bool parseDirectiveOrg(); // ".org"
560 // ".align{,32}", ".p2align{,w,l}"
561 bool parseDirectiveAlign(bool IsPow2, unsigned ValueSize);
562
563 // ".file", ".line", ".loc", ".stabs"
564 bool parseDirectiveFile(SMLoc DirectiveLoc);
565 bool parseDirectiveLine();
566 bool parseDirectiveLoc();
567 bool parseDirectiveStabs();
568
569 // ".cv_file", ".cv_func_id", ".cv_inline_site_id", ".cv_loc", ".cv_linetable",
570 // ".cv_inline_linetable", ".cv_def_range", ".cv_string"
571 bool parseDirectiveCVFile();
572 bool parseDirectiveCVFuncId();
573 bool parseDirectiveCVInlineSiteId();
574 bool parseDirectiveCVLoc();
575 bool parseDirectiveCVLinetable();
576 bool parseDirectiveCVInlineLinetable();
577 bool parseDirectiveCVDefRange();
578 bool parseDirectiveCVString();
579 bool parseDirectiveCVStringTable();
580 bool parseDirectiveCVFileChecksums();
581 bool parseDirectiveCVFileChecksumOffset();
582 bool parseDirectiveCVFPOData();
583
584 // .cfi directives
585 bool parseDirectiveCFIRegister(SMLoc DirectiveLoc);
586 bool parseDirectiveCFIWindowSave();
587 bool parseDirectiveCFISections();
588 bool parseDirectiveCFIStartProc();
589 bool parseDirectiveCFIEndProc();
590 bool parseDirectiveCFIDefCfaOffset();
591 bool parseDirectiveCFIDefCfa(SMLoc DirectiveLoc);
592 bool parseDirectiveCFIAdjustCfaOffset();
593 bool parseDirectiveCFIDefCfaRegister(SMLoc DirectiveLoc);
594 bool parseDirectiveCFIOffset(SMLoc DirectiveLoc);
595 bool parseDirectiveCFIRelOffset(SMLoc DirectiveLoc);
596 bool parseDirectiveCFIPersonalityOrLsda(bool IsPersonality);
597 bool parseDirectiveCFIRememberState();
598 bool parseDirectiveCFIRestoreState();
599 bool parseDirectiveCFISameValue(SMLoc DirectiveLoc);
600 bool parseDirectiveCFIRestore(SMLoc DirectiveLoc);
601 bool parseDirectiveCFIEscape();
602 bool parseDirectiveCFIReturnColumn(SMLoc DirectiveLoc);
603 bool parseDirectiveCFISignalFrame();
604 bool parseDirectiveCFIUndefined(SMLoc DirectiveLoc);
605
606 // macro directives
607 bool parseDirectivePurgeMacro(SMLoc DirectiveLoc);
608 bool parseDirectiveExitMacro(StringRef Directive);
609 bool parseDirectiveEndMacro(StringRef Directive);
610 bool parseDirectiveMacro(SMLoc DirectiveLoc);
611 bool parseDirectiveMacrosOnOff(StringRef Directive);
612 // alternate macro mode directives
613 bool parseDirectiveAltmacro(StringRef Directive);
614 // ".bundle_align_mode"
615 bool parseDirectiveBundleAlignMode();
616 // ".bundle_lock"
617 bool parseDirectiveBundleLock();
618 // ".bundle_unlock"
619 bool parseDirectiveBundleUnlock();
620
621 // ".space", ".skip"
622 bool parseDirectiveSpace(StringRef IDVal);
623
624 // ".dcb"
625 bool parseDirectiveDCB(StringRef IDVal, unsigned Size);
626 bool parseDirectiveRealDCB(StringRef IDVal, const fltSemantics &);
627 // ".ds"
628 bool parseDirectiveDS(StringRef IDVal, unsigned Size);
629
630 // .sleb128 (Signed=true) and .uleb128 (Signed=false)
631 bool parseDirectiveLEB128(bool Signed);
632
633 /// Parse a directive like ".globl" which
634 /// accepts a single symbol (which should be a label or an external).
635 bool parseDirectiveSymbolAttribute(MCSymbolAttr Attr);
636
637 bool parseDirectiveComm(bool IsLocal); // ".comm" and ".lcomm"
638
639 bool parseDirectiveAbort(); // ".abort"
640 bool parseDirectiveInclude(); // ".include"
641 bool parseDirectiveIncbin(); // ".incbin"
642
643 // ".if", ".ifeq", ".ifge", ".ifgt" , ".ifle", ".iflt" or ".ifne"
644 bool parseDirectiveIf(SMLoc DirectiveLoc, DirectiveKind DirKind);
645 // ".ifb" or ".ifnb", depending on ExpectBlank.
646 bool parseDirectiveIfb(SMLoc DirectiveLoc, bool ExpectBlank);
647 // ".ifc" or ".ifnc", depending on ExpectEqual.
648 bool parseDirectiveIfc(SMLoc DirectiveLoc, bool ExpectEqual);
649 // ".ifeqs" or ".ifnes", depending on ExpectEqual.
650 bool parseDirectiveIfeqs(SMLoc DirectiveLoc, bool ExpectEqual);
651 // ".ifdef" or ".ifndef", depending on expect_defined
652 bool parseDirectiveIfdef(SMLoc DirectiveLoc, bool expect_defined);
653 bool parseDirectiveElseIf(SMLoc DirectiveLoc); // ".elseif"
654 bool parseDirectiveElse(SMLoc DirectiveLoc); // ".else"
655 bool parseDirectiveEndIf(SMLoc DirectiveLoc); // .endif
656 bool parseEscapedString(std::string &Data) override;
657 bool parseAngleBracketString(std::string &Data) override;
658
659 const MCExpr *applyModifierToExpr(const MCExpr *E,
660 MCSymbolRefExpr::VariantKind Variant);
661
662 // Macro-like directives
663 MCAsmMacro *parseMacroLikeBody(SMLoc DirectiveLoc);
664 void instantiateMacroLikeBody(MCAsmMacro *M, SMLoc DirectiveLoc,
665 raw_svector_ostream &OS);
666 bool parseDirectiveRept(SMLoc DirectiveLoc, StringRef Directive);
667 bool parseDirectiveIrp(SMLoc DirectiveLoc); // ".irp"
668 bool parseDirectiveIrpc(SMLoc DirectiveLoc); // ".irpc"
669 bool parseDirectiveEndr(SMLoc DirectiveLoc); // ".endr"
670
671 // "_emit" or "__emit"
672 bool parseDirectiveMSEmit(SMLoc DirectiveLoc, ParseStatementInfo &Info,
673 size_t Len);
674
675 // "align"
676 bool parseDirectiveMSAlign(SMLoc DirectiveLoc, ParseStatementInfo &Info);
677
678 // "end"
679 bool parseDirectiveEnd(SMLoc DirectiveLoc);
680
681 // ".err" or ".error"
682 bool parseDirectiveError(SMLoc DirectiveLoc, bool WithMessage);
683
684 // ".warning"
685 bool parseDirectiveWarning(SMLoc DirectiveLoc);
686
687 // .print <double-quotes-string>
688 bool parseDirectivePrint(SMLoc DirectiveLoc);
689
690 // .pseudoprobe
691 bool parseDirectivePseudoProbe();
692
693 // ".lto_discard"
694 bool parseDirectiveLTODiscard();
695
696 // Directives to support address-significance tables.
697 bool parseDirectiveAddrsig();
698 bool parseDirectiveAddrsigSym();
699
700 void initializeDirectiveKindMap();
701 void initializeCVDefRangeTypeMap();
702};
703
704} // end anonymous namespace
705
706namespace llvm {
707
708extern MCAsmParserExtension *createDarwinAsmParser();
709extern MCAsmParserExtension *createELFAsmParser();
710extern MCAsmParserExtension *createCOFFAsmParser();
711extern MCAsmParserExtension *createWasmAsmParser();
712
713} // end namespace llvm
714
715enum { DEFAULT_ADDRSPACE = 0 };
716
717AsmParser::AsmParser(SourceMgr &SM, MCContext &Ctx, MCStreamer &Out,
718 const MCAsmInfo &MAI, unsigned CB = 0)
719 : Lexer(MAI), Ctx(Ctx), Out(Out), MAI(MAI), SrcMgr(SM),
720 CurBuffer(CB ? CB : SM.getMainFileID()), MacrosEnabledFlag(true) {
721 HadError = false;
722 // Save the old handler.
723 SavedDiagHandler = SrcMgr.getDiagHandler();
724 SavedDiagContext = SrcMgr.getDiagContext();
725 // Set our own handler which calls the saved handler.
726 SrcMgr.setDiagHandler(DiagHandler, this);
727 Lexer.setBuffer(SrcMgr.getMemoryBuffer(CurBuffer)->getBuffer());
728 // Make MCStreamer aware of the StartTokLoc for locations in diagnostics.
729 Out.setStartTokLocPtr(&StartTokLoc);
730
731 // Initialize the platform / file format parser.
732 switch (Ctx.getObjectFileInfo()->getObjectFileType()) {
733 case MCObjectFileInfo::IsCOFF:
734 PlatformParser.reset(createCOFFAsmParser());
735 break;
736 case MCObjectFileInfo::IsMachO:
737 PlatformParser.reset(createDarwinAsmParser());
738 IsDarwin = true;
739 break;
740 case MCObjectFileInfo::IsELF:
741 PlatformParser.reset(createELFAsmParser());
742 break;
743 case MCObjectFileInfo::IsWasm:
744 PlatformParser.reset(createWasmAsmParser());
745 break;
746 case MCObjectFileInfo::IsXCOFF:
747 report_fatal_error(
748 "Need to implement createXCOFFAsmParser for XCOFF format.");
749 break;
750 }
751
752 PlatformParser->Initialize(*this);
753 initializeDirectiveKindMap();
754 initializeCVDefRangeTypeMap();
755
756 NumOfMacroInstantiations = 0;
757}
758
759AsmParser::~AsmParser() {
760 assert((HadError || ActiveMacros.empty()) &&(((HadError || ActiveMacros.empty()) && "Unexpected active macro instantiation!"
) ? static_cast<void> (0) : __assert_fail ("(HadError || ActiveMacros.empty()) && \"Unexpected active macro instantiation!\""
, "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/llvm/lib/MC/MCParser/AsmParser.cpp"
, 761, __PRETTY_FUNCTION__))
761 "Unexpected active macro instantiation!")(((HadError || ActiveMacros.empty()) && "Unexpected active macro instantiation!"
) ? static_cast<void> (0) : __assert_fail ("(HadError || ActiveMacros.empty()) && \"Unexpected active macro instantiation!\""
, "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/llvm/lib/MC/MCParser/AsmParser.cpp"
, 761, __PRETTY_FUNCTION__))
;
762
763 // Remove MCStreamer's reference to the parser SMLoc.
764 Out.setStartTokLocPtr(nullptr);
765 // Restore the saved diagnostics handler and context for use during
766 // finalization.
767 SrcMgr.setDiagHandler(SavedDiagHandler, SavedDiagContext);
768}
769
770void AsmParser::printMacroInstantiations() {
771 // Print the active macro instantiation stack.
772 for (std::vector<MacroInstantiation *>::const_reverse_iterator
773 it = ActiveMacros.rbegin(),
774 ie = ActiveMacros.rend();
775 it != ie; ++it)
776 printMessage((*it)->InstantiationLoc, SourceMgr::DK_Note,
777 "while in macro instantiation");
778}
779
780void AsmParser::Note(SMLoc L, const Twine &Msg, SMRange Range) {
781 printPendingErrors();
782 printMessage(L, SourceMgr::DK_Note, Msg, Range);
783 printMacroInstantiations();
784}
785
786bool AsmParser::Warning(SMLoc L, const Twine &Msg, SMRange Range) {
787 if(getTargetParser().getTargetOptions().MCNoWarn)
788 return false;
789 if (getTargetParser().getTargetOptions().MCFatalWarnings)
790 return Error(L, Msg, Range);
791 printMessage(L, SourceMgr::DK_Warning, Msg, Range);
792 printMacroInstantiations();
793 return false;
794}
795
796bool AsmParser::printError(SMLoc L, const Twine &Msg, SMRange Range) {
797 HadError = true;
798 printMessage(L, SourceMgr::DK_Error, Msg, Range);
799 printMacroInstantiations();
800 return true;
801}
802
803bool AsmParser::enterIncludeFile(const std::string &Filename) {
804 std::string IncludedFile;
805 unsigned NewBuf =
806 SrcMgr.AddIncludeFile(Filename, Lexer.getLoc(), IncludedFile);
807 if (!NewBuf)
808 return true;
809
810 CurBuffer = NewBuf;
811 Lexer.setBuffer(SrcMgr.getMemoryBuffer(CurBuffer)->getBuffer());
812 return false;
813}
814
815/// Process the specified .incbin file by searching for it in the include paths
816/// then just emitting the byte contents of the file to the streamer. This
817/// returns true on failure.
818bool AsmParser::processIncbinFile(const std::string &Filename, int64_t Skip,
819 const MCExpr *Count, SMLoc Loc) {
820 std::string IncludedFile;
821 unsigned NewBuf =
822 SrcMgr.AddIncludeFile(Filename, Lexer.getLoc(), IncludedFile);
823 if (!NewBuf)
824 return true;
825
826 // Pick up the bytes from the file and emit them.
827 StringRef Bytes = SrcMgr.getMemoryBuffer(NewBuf)->getBuffer();
828 Bytes = Bytes.drop_front(Skip);
829 if (Count) {
830 int64_t Res;
831 if (!Count->evaluateAsAbsolute(Res, getStreamer().getAssemblerPtr()))
832 return Error(Loc, "expected absolute expression");
833 if (Res < 0)
834 return Warning(Loc, "negative count has no effect");
835 Bytes = Bytes.take_front(Res);
836 }
837 getStreamer().emitBytes(Bytes);
838 return false;
839}
840
841void AsmParser::jumpToLoc(SMLoc Loc, unsigned InBuffer) {
842 CurBuffer = InBuffer ? InBuffer : SrcMgr.FindBufferContainingLoc(Loc);
843 Lexer.setBuffer(SrcMgr.getMemoryBuffer(CurBuffer)->getBuffer(),
844 Loc.getPointer());
845}
846
847const AsmToken &AsmParser::Lex() {
848 if (Lexer.getTok().is(AsmToken::Error))
849 Error(Lexer.getErrLoc(), Lexer.getErr());
850
851 // if it's a end of statement with a comment in it
852 if (getTok().is(AsmToken::EndOfStatement)) {
853 // if this is a line comment output it.
854 if (!getTok().getString().empty() && getTok().getString().front() != '\n' &&
855 getTok().getString().front() != '\r' && MAI.preserveAsmComments())
856 Out.addExplicitComment(Twine(getTok().getString()));
857 }
858
859 const AsmToken *tok = &Lexer.Lex();
860
861 // Parse comments here to be deferred until end of next statement.
862 while (tok->is(AsmToken::Comment)) {
863 if (MAI.preserveAsmComments())
864 Out.addExplicitComment(Twine(tok->getString()));
865 tok = &Lexer.Lex();
866 }
867
868 if (tok->is(AsmToken::Eof)) {
869 // If this is the end of an included file, pop the parent file off the
870 // include stack.
871 SMLoc ParentIncludeLoc = SrcMgr.getParentIncludeLoc(CurBuffer);
872 if (ParentIncludeLoc != SMLoc()) {
873 jumpToLoc(ParentIncludeLoc);
874 return Lex();
875 }
876 }
877
878 return *tok;
879}
880
881bool AsmParser::enabledGenDwarfForAssembly() {
882 // Check whether the user specified -g.
883 if (!getContext().getGenDwarfForAssembly())
884 return false;
885 // If we haven't encountered any .file directives (which would imply that
886 // the assembler source was produced with debug info already) then emit one
887 // describing the assembler source file itself.
888 if (getContext().getGenDwarfFileNumber() == 0) {
889 // Use the first #line directive for this, if any. It's preprocessed, so
890 // there is no checksum, and of course no source directive.
891 if (!FirstCppHashFilename.empty())
892 getContext().setMCLineTableRootFile(/*CUID=*/0,
893 getContext().getCompilationDir(),
894 FirstCppHashFilename,
895 /*Cksum=*/None, /*Source=*/None);
896 const MCDwarfFile &RootFile =
897 getContext().getMCDwarfLineTable(/*CUID=*/0).getRootFile();
898 getContext().setGenDwarfFileNumber(getStreamer().emitDwarfFileDirective(
899 /*CUID=*/0, getContext().getCompilationDir(), RootFile.Name,
900 RootFile.Checksum, RootFile.Source));
901 }
902 return true;
903}
904
905bool AsmParser::Run(bool NoInitialTextSection, bool NoFinalize) {
906 LTODiscardSymbols.clear();
907
908 // Create the initial section, if requested.
909 if (!NoInitialTextSection)
910 Out.InitSections(false);
911
912 // Prime the lexer.
913 Lex();
914
915 HadError = false;
916 AsmCond StartingCondState = TheCondState;
917 SmallVector<AsmRewrite, 4> AsmStrRewrites;
918
919 // If we are generating dwarf for assembly source files save the initial text
920 // section. (Don't use enabledGenDwarfForAssembly() here, as we aren't
921 // emitting any actual debug info yet and haven't had a chance to parse any
922 // embedded .file directives.)
923 if (getContext().getGenDwarfForAssembly()) {
924 MCSection *Sec = getStreamer().getCurrentSectionOnly();
925 if (!Sec->getBeginSymbol()) {
926 MCSymbol *SectionStartSym = getContext().createTempSymbol();
927 getStreamer().emitLabel(SectionStartSym);
928 Sec->setBeginSymbol(SectionStartSym);
929 }
930 bool InsertResult = getContext().addGenDwarfSection(Sec);
931 assert(InsertResult && ".text section should not have debug info yet")((InsertResult && ".text section should not have debug info yet"
) ? static_cast<void> (0) : __assert_fail ("InsertResult && \".text section should not have debug info yet\""
, "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/llvm/lib/MC/MCParser/AsmParser.cpp"
, 931, __PRETTY_FUNCTION__))
;
932 (void)InsertResult;
933 }
934
935 getTargetParser().onBeginOfFile();
936
937 // While we have input, parse each statement.
938 while (Lexer.isNot(AsmToken::Eof)) {
939 ParseStatementInfo Info(&AsmStrRewrites);
940 bool Parsed = parseStatement(Info, nullptr);
941
942 // If we have a Lexer Error we are on an Error Token. Load in Lexer Error
943 // for printing ErrMsg via Lex() only if no (presumably better) parser error
944 // exists.
945 if (Parsed && !hasPendingError() && Lexer.getTok().is(AsmToken::Error)) {
946 Lex();
947 }
948
949 // parseStatement returned true so may need to emit an error.
950 printPendingErrors();
951
952 // Skipping to the next line if needed.
953 if (Parsed && !getLexer().isAtStartOfStatement())
954 eatToEndOfStatement();
955 }
956
957 getTargetParser().onEndOfFile();
958 printPendingErrors();
959
960 // All errors should have been emitted.
961 assert(!hasPendingError() && "unexpected error from parseStatement")((!hasPendingError() && "unexpected error from parseStatement"
) ? static_cast<void> (0) : __assert_fail ("!hasPendingError() && \"unexpected error from parseStatement\""
, "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/llvm/lib/MC/MCParser/AsmParser.cpp"
, 961, __PRETTY_FUNCTION__))
;
962
963 getTargetParser().flushPendingInstructions(getStreamer());
964
965 if (TheCondState.TheCond != StartingCondState.TheCond ||
966 TheCondState.Ignore != StartingCondState.Ignore)
967 printError(getTok().getLoc(), "unmatched .ifs or .elses");
968 // Check to see there are no empty DwarfFile slots.
969 const auto &LineTables = getContext().getMCDwarfLineTables();
970 if (!LineTables.empty()) {
971 unsigned Index = 0;
972 for (const auto &File : LineTables.begin()->second.getMCDwarfFiles()) {
973 if (File.Name.empty() && Index != 0)
974 printError(getTok().getLoc(), "unassigned file number: " +
975 Twine(Index) +
976 " for .file directives");
977 ++Index;
978 }
979 }
980
981 // Check to see that all assembler local symbols were actually defined.
982 // Targets that don't do subsections via symbols may not want this, though,
983 // so conservatively exclude them. Only do this if we're finalizing, though,
984 // as otherwise we won't necessarilly have seen everything yet.
985 if (!NoFinalize) {
986 if (MAI.hasSubsectionsViaSymbols()) {
987 for (const auto &TableEntry : getContext().getSymbols()) {
988 MCSymbol *Sym = TableEntry.getValue();
989 // Variable symbols may not be marked as defined, so check those
990 // explicitly. If we know it's a variable, we have a definition for
991 // the purposes of this check.
992 if (Sym->isTemporary() && !Sym->isVariable() && !Sym->isDefined())
993 // FIXME: We would really like to refer back to where the symbol was
994 // first referenced for a source location. We need to add something
995 // to track that. Currently, we just point to the end of the file.
996 printError(getTok().getLoc(), "assembler local symbol '" +
997 Sym->getName() + "' not defined");
998 }
999 }
1000
1001 // Temporary symbols like the ones for directional jumps don't go in the
1002 // symbol table. They also need to be diagnosed in all (final) cases.
1003 for (std::tuple<SMLoc, CppHashInfoTy, MCSymbol *> &LocSym : DirLabels) {
1004 if (std::get<2>(LocSym)->isUndefined()) {
1005 // Reset the state of any "# line file" directives we've seen to the
1006 // context as it was at the diagnostic site.
1007 CppHashInfo = std::get<1>(LocSym);
1008 printError(std::get<0>(LocSym), "directional label undefined");
1009 }
1010 }
1011 }
1012
1013 // Finalize the output stream if there are no errors and if the client wants
1014 // us to.
1015 if (!HadError && !NoFinalize)
1016 Out.Finish(Lexer.getLoc());
1017
1018 return HadError || getContext().hadError();
1019}
1020
1021bool AsmParser::checkForValidSection() {
1022 if (!ParsingMSInlineAsm && !getStreamer().getCurrentSectionOnly()) {
1023 Out.InitSections(false);
1024 return Error(getTok().getLoc(),
1025 "expected section directive before assembly directive");
1026 }
1027 return false;
1028}
1029
1030/// Throw away the rest of the line for testing purposes.
1031void AsmParser::eatToEndOfStatement() {
1032 while (Lexer.isNot(AsmToken::EndOfStatement) && Lexer.isNot(AsmToken::Eof))
1033 Lexer.Lex();
1034
1035 // Eat EOL.
1036 if (Lexer.is(AsmToken::EndOfStatement))
1037 Lexer.Lex();
1038}
1039
1040StringRef AsmParser::parseStringToEndOfStatement() {
1041 const char *Start = getTok().getLoc().getPointer();
1042
1043 while (Lexer.isNot(AsmToken::EndOfStatement) && Lexer.isNot(AsmToken::Eof))
1044 Lexer.Lex();
1045
1046 const char *End = getTok().getLoc().getPointer();
1047 return StringRef(Start, End - Start);
1048}
1049
1050StringRef AsmParser::parseStringToComma() {
1051 const char *Start = getTok().getLoc().getPointer();
1052
1053 while (Lexer.isNot(AsmToken::EndOfStatement) &&
1054 Lexer.isNot(AsmToken::Comma) && Lexer.isNot(AsmToken::Eof))
1055 Lexer.Lex();
1056
1057 const char *End = getTok().getLoc().getPointer();
1058 return StringRef(Start, End - Start);
1059}
1060
1061/// Parse a paren expression and return it.
1062/// NOTE: This assumes the leading '(' has already been consumed.
1063///
1064/// parenexpr ::= expr)
1065///
1066bool AsmParser::parseParenExpr(const MCExpr *&Res, SMLoc &EndLoc) {
1067 if (parseExpression(Res))
1068 return true;
1069 if (Lexer.isNot(AsmToken::RParen))
1070 return TokError("expected ')' in parentheses expression");
1071 EndLoc = Lexer.getTok().getEndLoc();
1072 Lex();
1073 return false;
1074}
1075
1076/// Parse a bracket expression and return it.
1077/// NOTE: This assumes the leading '[' has already been consumed.
1078///
1079/// bracketexpr ::= expr]
1080///
1081bool AsmParser::parseBracketExpr(const MCExpr *&Res, SMLoc &EndLoc) {
1082 if (parseExpression(Res))
1083 return true;
1084 EndLoc = getTok().getEndLoc();
1085 if (parseToken(AsmToken::RBrac, "expected ']' in brackets expression"))
1086 return true;
1087 return false;
1088}
1089
1090/// Parse a primary expression and return it.
1091/// primaryexpr ::= (parenexpr
1092/// primaryexpr ::= symbol
1093/// primaryexpr ::= number
1094/// primaryexpr ::= '.'
1095/// primaryexpr ::= ~,+,- primaryexpr
1096bool AsmParser::parsePrimaryExpr(const MCExpr *&Res, SMLoc &EndLoc,
1097 AsmTypeInfo *TypeInfo) {
1098 SMLoc FirstTokenLoc = getLexer().getLoc();
1099 AsmToken::TokenKind FirstTokenKind = Lexer.getKind();
1100 switch (FirstTokenKind) {
1101 default:
1102 return TokError("unknown token in expression");
1103 // If we have an error assume that we've already handled it.
1104 case AsmToken::Error:
1105 return true;
1106 case AsmToken::Exclaim:
1107 Lex(); // Eat the operator.
1108 if (parsePrimaryExpr(Res, EndLoc, TypeInfo))
1109 return true;
1110 Res = MCUnaryExpr::createLNot(Res, getContext(), FirstTokenLoc);
1111 return false;
1112 case AsmToken::Dollar:
1113 case AsmToken::At:
1114 case AsmToken::String:
1115 case AsmToken::Identifier: {
1116 StringRef Identifier;
1117 if (parseIdentifier(Identifier)) {
1118 // We may have failed but $ may be a valid token.
1119 if (getTok().is(AsmToken::Dollar)) {
1120 if (Lexer.getMAI().getDollarIsPC()) {
1121 Lex();
1122 // This is a '$' reference, which references the current PC. Emit a
1123 // temporary label to the streamer and refer to it.
1124 MCSymbol *Sym = Ctx.createTempSymbol();
1125 Out.emitLabel(Sym);
1126 Res = MCSymbolRefExpr::create(Sym, MCSymbolRefExpr::VK_None,
1127 getContext());
1128 EndLoc = FirstTokenLoc;
1129 return false;
1130 }
1131 return Error(FirstTokenLoc, "invalid token in expression");
1132 }
1133 }
1134 // Parse symbol variant
1135 std::pair<StringRef, StringRef> Split;
1136 if (!MAI.useParensForSymbolVariant()) {
1137 if (FirstTokenKind == AsmToken::String) {
1138 if (Lexer.is(AsmToken::At)) {
1139 Lex(); // eat @
1140 SMLoc AtLoc = getLexer().getLoc();
1141 StringRef VName;
1142 if (parseIdentifier(VName))
1143 return Error(AtLoc, "expected symbol variant after '@'");
1144
1145 Split = std::make_pair(Identifier, VName);
1146 }
1147 } else {
1148 Split = Identifier.split('@');
1149 }
1150 } else if (Lexer.is(AsmToken::LParen)) {
1151 Lex(); // eat '('.
1152 StringRef VName;
1153 parseIdentifier(VName);
1154 // eat ')'.
1155 if (parseToken(AsmToken::RParen,
1156 "unexpected token in variant, expected ')'"))
1157 return true;
1158 Split = std::make_pair(Identifier, VName);
1159 }
1160
1161 EndLoc = SMLoc::getFromPointer(Identifier.end());
1162
1163 // This is a symbol reference.
1164 StringRef SymbolName = Identifier;
1165 if (SymbolName.empty())
1166 return Error(getLexer().getLoc(), "expected a symbol reference");
1167
1168 MCSymbolRefExpr::VariantKind Variant = MCSymbolRefExpr::VK_None;
1169
1170 // Lookup the symbol variant if used.
1171 if (!Split.second.empty()) {
1172 Variant = MCSymbolRefExpr::getVariantKindForName(Split.second);
1173 if (Variant != MCSymbolRefExpr::VK_Invalid) {
1174 SymbolName = Split.first;
1175 } else if (MAI.doesAllowAtInName() && !MAI.useParensForSymbolVariant()) {
1176 Variant = MCSymbolRefExpr::VK_None;
1177 } else {
1178 return Error(SMLoc::getFromPointer(Split.second.begin()),
1179 "invalid variant '" + Split.second + "'");
1180 }
1181 }
1182
1183 MCSymbol *Sym = getContext().getInlineAsmLabel(SymbolName);
1184 if (!Sym)
1185 Sym = getContext().getOrCreateSymbol(SymbolName);
1186
1187 // If this is an absolute variable reference, substitute it now to preserve
1188 // semantics in the face of reassignment.
1189 if (Sym->isVariable()) {
1190 auto V = Sym->getVariableValue(/*SetUsed*/ false);
1191 bool DoInline = isa<MCConstantExpr>(V) && !Variant;
1192 if (auto TV = dyn_cast<MCTargetExpr>(V))
1193 DoInline = TV->inlineAssignedExpr();
1194 if (DoInline) {
1195 if (Variant)
1196 return Error(EndLoc, "unexpected modifier on variable reference");
1197 Res = Sym->getVariableValue(/*SetUsed*/ false);
1198 return false;
1199 }
1200 }
1201
1202 // Otherwise create a symbol ref.
1203 Res = MCSymbolRefExpr::create(Sym, Variant, getContext(), FirstTokenLoc);
1204 return false;
1205 }
1206 case AsmToken::BigNum:
1207 return TokError("literal value out of range for directive");
1208 case AsmToken::Integer: {
1209 SMLoc Loc = getTok().getLoc();
1210 int64_t IntVal = getTok().getIntVal();
1211 Res = MCConstantExpr::create(IntVal, getContext());
1212 EndLoc = Lexer.getTok().getEndLoc();
1213 Lex(); // Eat token.
1214 // Look for 'b' or 'f' following an Integer as a directional label
1215 if (Lexer.getKind() == AsmToken::Identifier) {
1216 StringRef IDVal = getTok().getString();
1217 // Lookup the symbol variant if used.
1218 std::pair<StringRef, StringRef> Split = IDVal.split('@');
1219 MCSymbolRefExpr::VariantKind Variant = MCSymbolRefExpr::VK_None;
1220 if (Split.first.size() != IDVal.size()) {
1221 Variant = MCSymbolRefExpr::getVariantKindForName(Split.second);
1222 if (Variant == MCSymbolRefExpr::VK_Invalid)
1223 return TokError("invalid variant '" + Split.second + "'");
1224 IDVal = Split.first;
1225 }
1226 if (IDVal == "f" || IDVal == "b") {
1227 MCSymbol *Sym =
1228 Ctx.getDirectionalLocalSymbol(IntVal, IDVal == "b");
1229 Res = MCSymbolRefExpr::create(Sym, Variant, getContext());
1230 if (IDVal == "b" && Sym->isUndefined())
1231 return Error(Loc, "directional label undefined");
1232 DirLabels.push_back(std::make_tuple(Loc, CppHashInfo, Sym));
1233 EndLoc = Lexer.getTok().getEndLoc();
1234 Lex(); // Eat identifier.
1235 }
1236 }
1237 return false;
1238 }
1239 case AsmToken::Real: {
1240 APFloat RealVal(APFloat::IEEEdouble(), getTok().getString());
1241 uint64_t IntVal = RealVal.bitcastToAPInt().getZExtValue();
1242 Res = MCConstantExpr::create(IntVal, getContext());
1243 EndLoc = Lexer.getTok().getEndLoc();
1244 Lex(); // Eat token.
1245 return false;
1246 }
1247 case AsmToken::Dot: {
1248 // This is a '.' reference, which references the current PC. Emit a
1249 // temporary label to the streamer and refer to it.
1250 MCSymbol *Sym = Ctx.createTempSymbol();
1251 Out.emitLabel(Sym);
1252 Res = MCSymbolRefExpr::create(Sym, MCSymbolRefExpr::VK_None, getContext());
1253 EndLoc = Lexer.getTok().getEndLoc();
1254 Lex(); // Eat identifier.
1255 return false;
1256 }
1257 case AsmToken::LParen:
1258 Lex(); // Eat the '('.
1259 return parseParenExpr(Res, EndLoc);
1260 case AsmToken::LBrac:
1261 if (!PlatformParser->HasBracketExpressions())
1262 return TokError("brackets expression not supported on this target");
1263 Lex(); // Eat the '['.
1264 return parseBracketExpr(Res, EndLoc);
1265 case AsmToken::Minus:
1266 Lex(); // Eat the operator.
1267 if (parsePrimaryExpr(Res, EndLoc, TypeInfo))
1268 return true;
1269 Res = MCUnaryExpr::createMinus(Res, getContext(), FirstTokenLoc);
1270 return false;
1271 case AsmToken::Plus:
1272 Lex(); // Eat the operator.
1273 if (parsePrimaryExpr(Res, EndLoc, TypeInfo))
1274 return true;
1275 Res = MCUnaryExpr::createPlus(Res, getContext(), FirstTokenLoc);
1276 return false;
1277 case AsmToken::Tilde:
1278 Lex(); // Eat the operator.
1279 if (parsePrimaryExpr(Res, EndLoc, TypeInfo))
1280 return true;
1281 Res = MCUnaryExpr::createNot(Res, getContext(), FirstTokenLoc);
1282 return false;
1283 // MIPS unary expression operators. The lexer won't generate these tokens if
1284 // MCAsmInfo::HasMipsExpressions is false for the target.
1285 case AsmToken::PercentCall16:
1286 case AsmToken::PercentCall_Hi:
1287 case AsmToken::PercentCall_Lo:
1288 case AsmToken::PercentDtprel_Hi:
1289 case AsmToken::PercentDtprel_Lo:
1290 case AsmToken::PercentGot:
1291 case AsmToken::PercentGot_Disp:
1292 case AsmToken::PercentGot_Hi:
1293 case AsmToken::PercentGot_Lo:
1294 case AsmToken::PercentGot_Ofst:
1295 case AsmToken::PercentGot_Page:
1296 case AsmToken::PercentGottprel:
1297 case AsmToken::PercentGp_Rel:
1298 case AsmToken::PercentHi:
1299 case AsmToken::PercentHigher:
1300 case AsmToken::PercentHighest:
1301 case AsmToken::PercentLo:
1302 case AsmToken::PercentNeg:
1303 case AsmToken::PercentPcrel_Hi:
1304 case AsmToken::PercentPcrel_Lo:
1305 case AsmToken::PercentTlsgd:
1306 case AsmToken::PercentTlsldm:
1307 case AsmToken::PercentTprel_Hi:
1308 case AsmToken::PercentTprel_Lo:
1309 Lex(); // Eat the operator.
1310 if (Lexer.isNot(AsmToken::LParen))
1311 return TokError("expected '(' after operator");
1312 Lex(); // Eat the operator.
1313 if (parseExpression(Res, EndLoc))
1314 return true;
1315 if (Lexer.isNot(AsmToken::RParen))
1316 return TokError("expected ')'");
1317 Lex(); // Eat the operator.
1318 Res = getTargetParser().createTargetUnaryExpr(Res, FirstTokenKind, Ctx);
1319 return !Res;
1320 }
1321}
1322
1323bool AsmParser::parseExpression(const MCExpr *&Res) {
1324 SMLoc EndLoc;
1325 return parseExpression(Res, EndLoc);
1326}
1327
1328const MCExpr *
1329AsmParser::applyModifierToExpr(const MCExpr *E,
1330 MCSymbolRefExpr::VariantKind Variant) {
1331 // Ask the target implementation about this expression first.
1332 const MCExpr *NewE = getTargetParser().applyModifierToExpr(E, Variant, Ctx);
1333 if (NewE)
1334 return NewE;
1335 // Recurse over the given expression, rebuilding it to apply the given variant
1336 // if there is exactly one symbol.
1337 switch (E->getKind()) {
1338 case MCExpr::Target:
1339 case MCExpr::Constant:
1340 return nullptr;
1341
1342 case MCExpr::SymbolRef: {
1343 const MCSymbolRefExpr *SRE = cast<MCSymbolRefExpr>(E);
1344
1345 if (SRE->getKind() != MCSymbolRefExpr::VK_None) {
1346 TokError("invalid variant on expression '" + getTok().getIdentifier() +
1347 "' (already modified)");
1348 return E;
1349 }
1350
1351 return MCSymbolRefExpr::create(&SRE->getSymbol(), Variant, getContext());
1352 }
1353
1354 case MCExpr::Unary: {
1355 const MCUnaryExpr *UE = cast<MCUnaryExpr>(E);
1356 const MCExpr *Sub = applyModifierToExpr(UE->getSubExpr(), Variant);
1357 if (!Sub)
1358 return nullptr;
1359 return MCUnaryExpr::create(UE->getOpcode(), Sub, getContext());
1360 }
1361
1362 case MCExpr::Binary: {
1363 const MCBinaryExpr *BE = cast<MCBinaryExpr>(E);
1364 const MCExpr *LHS = applyModifierToExpr(BE->getLHS(), Variant);
1365 const MCExpr *RHS = applyModifierToExpr(BE->getRHS(), Variant);
1366
1367 if (!LHS && !RHS)
1368 return nullptr;
1369
1370 if (!LHS)
1371 LHS = BE->getLHS();
1372 if (!RHS)
1373 RHS = BE->getRHS();
1374
1375 return MCBinaryExpr::create(BE->getOpcode(), LHS, RHS, getContext());
1376 }
1377 }
1378
1379 llvm_unreachable("Invalid expression kind!")::llvm::llvm_unreachable_internal("Invalid expression kind!",
"/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/llvm/lib/MC/MCParser/AsmParser.cpp"
, 1379)
;
1380}
1381
1382/// This function checks if the next token is <string> type or arithmetic.
1383/// string that begin with character '<' must end with character '>'.
1384/// otherwise it is arithmetics.
1385/// If the function returns a 'true' value,
1386/// the End argument will be filled with the last location pointed to the '>'
1387/// character.
1388
1389/// There is a gap between the AltMacro's documentation and the single quote
1390/// implementation. GCC does not fully support this feature and so we will not
1391/// support it.
1392/// TODO: Adding single quote as a string.
1393static bool isAngleBracketString(SMLoc &StrLoc, SMLoc &EndLoc) {
1394 assert((StrLoc.getPointer() != nullptr) &&(((StrLoc.getPointer() != nullptr) && "Argument to the function cannot be a NULL value"
) ? static_cast<void> (0) : __assert_fail ("(StrLoc.getPointer() != nullptr) && \"Argument to the function cannot be a NULL value\""
, "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/llvm/lib/MC/MCParser/AsmParser.cpp"
, 1395, __PRETTY_FUNCTION__))
1395 "Argument to the function cannot be a NULL value")(((StrLoc.getPointer() != nullptr) && "Argument to the function cannot be a NULL value"
) ? static_cast<void> (0) : __assert_fail ("(StrLoc.getPointer() != nullptr) && \"Argument to the function cannot be a NULL value\""
, "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/llvm/lib/MC/MCParser/AsmParser.cpp"
, 1395, __PRETTY_FUNCTION__))
;
1396 const char *CharPtr = StrLoc.getPointer();
1397 while ((*CharPtr != '>') && (*CharPtr != '\n') && (*CharPtr != '\r') &&
1398 (*CharPtr != '\0')) {
1399 if (*CharPtr == '!')
1400 CharPtr++;
1401 CharPtr++;
1402 }
1403 if (*CharPtr == '>') {
1404 EndLoc = StrLoc.getFromPointer(CharPtr + 1);
1405 return true;
1406 }
1407 return false;
1408}
1409
1410/// creating a string without the escape characters '!'.
1411static std::string angleBracketString(StringRef AltMacroStr) {
1412 std::string Res;
1413 for (size_t Pos = 0; Pos < AltMacroStr.size(); Pos++) {
1414 if (AltMacroStr[Pos] == '!')
1415 Pos++;
1416 Res += AltMacroStr[Pos];
1417 }
1418 return Res;
1419}
1420
1421/// Parse an expression and return it.
1422///
1423/// expr ::= expr &&,|| expr -> lowest.
1424/// expr ::= expr |,^,&,! expr
1425/// expr ::= expr ==,!=,<>,<,<=,>,>= expr
1426/// expr ::= expr <<,>> expr
1427/// expr ::= expr +,- expr
1428/// expr ::= expr *,/,% expr -> highest.
1429/// expr ::= primaryexpr
1430///
1431bool AsmParser::parseExpression(const MCExpr *&Res, SMLoc &EndLoc) {
1432 // Parse the expression.
1433 Res = nullptr;
1434 if (getTargetParser().parsePrimaryExpr(Res, EndLoc) ||
1435 parseBinOpRHS(1, Res, EndLoc))
1436 return true;
1437
1438 // As a special case, we support 'a op b @ modifier' by rewriting the
1439 // expression to include the modifier. This is inefficient, but in general we
1440 // expect users to use 'a@modifier op b'.
1441 if (Lexer.getKind() == AsmToken::At) {
1442 Lex();
1443
1444 if (Lexer.isNot(AsmToken::Identifier))
1445 return TokError("unexpected symbol modifier following '@'");
1446
1447 MCSymbolRefExpr::VariantKind Variant =
1448 MCSymbolRefExpr::getVariantKindForName(getTok().getIdentifier());
1449 if (Variant == MCSymbolRefExpr::VK_Invalid)
1450 return TokError("invalid variant '" + getTok().getIdentifier() + "'");
1451
1452 const MCExpr *ModifiedRes = applyModifierToExpr(Res, Variant);
1453 if (!ModifiedRes) {
1454 return TokError("invalid modifier '" + getTok().getIdentifier() +
1455 "' (no symbols present)");
1456 }
1457
1458 Res = ModifiedRes;
1459 Lex();
1460 }
1461
1462 // Try to constant fold it up front, if possible. Do not exploit
1463 // assembler here.
1464 int64_t Value;
1465 if (Res->evaluateAsAbsolute(Value))
1466 Res = MCConstantExpr::create(Value, getContext());
1467
1468 return false;
1469}
1470
1471bool AsmParser::parseParenExpression(const MCExpr *&Res, SMLoc &EndLoc) {
1472 Res = nullptr;
1473 return parseParenExpr(Res, EndLoc) || parseBinOpRHS(1, Res, EndLoc);
1474}
1475
1476bool AsmParser::parseParenExprOfDepth(unsigned ParenDepth, const MCExpr *&Res,
1477 SMLoc &EndLoc) {
1478 if (parseParenExpr(Res, EndLoc))
1479 return true;
1480
1481 for (; ParenDepth > 0; --ParenDepth) {
1482 if (parseBinOpRHS(1, Res, EndLoc))
1483 return true;
1484
1485 // We don't Lex() the last RParen.
1486 // This is the same behavior as parseParenExpression().
1487 if (ParenDepth - 1 > 0) {
1488 EndLoc = getTok().getEndLoc();
1489 if (parseToken(AsmToken::RParen,
1490 "expected ')' in parentheses expression"))
1491 return true;
1492 }
1493 }
1494 return false;
1495}
1496
1497bool AsmParser::parseAbsoluteExpression(int64_t &Res) {
1498 const MCExpr *Expr;
1499
1500 SMLoc StartLoc = Lexer.getLoc();
1501 if (parseExpression(Expr))
1502 return true;
1503
1504 if (!Expr->evaluateAsAbsolute(Res, getStreamer().getAssemblerPtr()))
1505 return Error(StartLoc, "expected absolute expression");
1506
1507 return false;
1508}
1509
1510static unsigned getDarwinBinOpPrecedence(AsmToken::TokenKind K,
1511 MCBinaryExpr::Opcode &Kind,
1512 bool ShouldUseLogicalShr) {
1513 switch (K) {
1514 default:
1515 return 0; // not a binop.
1516
1517 // Lowest Precedence: &&, ||
1518 case AsmToken::AmpAmp:
1519 Kind = MCBinaryExpr::LAnd;
1520 return 1;
1521 case AsmToken::PipePipe:
1522 Kind = MCBinaryExpr::LOr;
1523 return 1;
1524
1525 // Low Precedence: |, &, ^
1526 case AsmToken::Pipe:
1527 Kind = MCBinaryExpr::Or;
1528 return 2;
1529 case AsmToken::Caret:
1530 Kind = MCBinaryExpr::Xor;
1531 return 2;
1532 case AsmToken::Amp:
1533 Kind = MCBinaryExpr::And;
1534 return 2;
1535
1536 // Low Intermediate Precedence: ==, !=, <>, <, <=, >, >=
1537 case AsmToken::EqualEqual:
1538 Kind = MCBinaryExpr::EQ;
1539 return 3;
1540 case AsmToken::ExclaimEqual:
1541 case AsmToken::LessGreater:
1542 Kind = MCBinaryExpr::NE;
1543 return 3;
1544 case AsmToken::Less:
1545 Kind = MCBinaryExpr::LT;
1546 return 3;
1547 case AsmToken::LessEqual:
1548 Kind = MCBinaryExpr::LTE;
1549 return 3;
1550 case AsmToken::Greater:
1551 Kind = MCBinaryExpr::GT;
1552 return 3;
1553 case AsmToken::GreaterEqual:
1554 Kind = MCBinaryExpr::GTE;
1555 return 3;
1556
1557 // Intermediate Precedence: <<, >>
1558 case AsmToken::LessLess:
1559 Kind = MCBinaryExpr::Shl;
1560 return 4;
1561 case AsmToken::GreaterGreater:
1562 Kind = ShouldUseLogicalShr ? MCBinaryExpr::LShr : MCBinaryExpr::AShr;
1563 return 4;
1564
1565 // High Intermediate Precedence: +, -
1566 case AsmToken::Plus:
1567 Kind = MCBinaryExpr::Add;
1568 return 5;
1569 case AsmToken::Minus:
1570 Kind = MCBinaryExpr::Sub;
1571 return 5;
1572
1573 // Highest Precedence: *, /, %
1574 case AsmToken::Star:
1575 Kind = MCBinaryExpr::Mul;
1576 return 6;
1577 case AsmToken::Slash:
1578 Kind = MCBinaryExpr::Div;
1579 return 6;
1580 case AsmToken::Percent:
1581 Kind = MCBinaryExpr::Mod;
1582 return 6;
1583 }
1584}
1585
1586static unsigned getGNUBinOpPrecedence(const MCAsmInfo &MAI,
1587 AsmToken::TokenKind K,
1588 MCBinaryExpr::Opcode &Kind,
1589 bool ShouldUseLogicalShr) {
1590 switch (K) {
1591 default:
1592 return 0; // not a binop.
1593
1594 // Lowest Precedence: &&, ||
1595 case AsmToken::AmpAmp:
1596 Kind = MCBinaryExpr::LAnd;
1597 return 2;
1598 case AsmToken::PipePipe:
1599 Kind = MCBinaryExpr::LOr;
1600 return 1;
1601
1602 // Low Precedence: ==, !=, <>, <, <=, >, >=
1603 case AsmToken::EqualEqual:
1604 Kind = MCBinaryExpr::EQ;
1605 return 3;
1606 case AsmToken::ExclaimEqual:
1607 case AsmToken::LessGreater:
1608 Kind = MCBinaryExpr::NE;
1609 return 3;
1610 case AsmToken::Less:
1611 Kind = MCBinaryExpr::LT;
1612 return 3;
1613 case AsmToken::LessEqual:
1614 Kind = MCBinaryExpr::LTE;
1615 return 3;
1616 case AsmToken::Greater:
1617 Kind = MCBinaryExpr::GT;
1618 return 3;
1619 case AsmToken::GreaterEqual:
1620 Kind = MCBinaryExpr::GTE;
1621 return 3;
1622
1623 // Low Intermediate Precedence: +, -
1624 case AsmToken::Plus:
1625 Kind = MCBinaryExpr::Add;
1626 return 4;
1627 case AsmToken::Minus:
1628 Kind = MCBinaryExpr::Sub;
1629 return 4;
1630
1631 // High Intermediate Precedence: |, !, &, ^
1632 //
1633 case AsmToken::Pipe:
1634 Kind = MCBinaryExpr::Or;
1635 return 5;
1636 case AsmToken::Exclaim:
1637 // Hack to support ARM compatible aliases (implied 'sp' operand in 'srs*'
1638 // instructions like 'srsda #31!') and not parse ! as an infix operator.
1639 if (MAI.getCommentString() == "@")
1640 return 0;
1641 Kind = MCBinaryExpr::OrNot;
1642 return 5;
1643 case AsmToken::Caret:
1644 Kind = MCBinaryExpr::Xor;
1645 return 5;
1646 case AsmToken::Amp:
1647 Kind = MCBinaryExpr::And;
1648 return 5;
1649
1650 // Highest Precedence: *, /, %, <<, >>
1651 case AsmToken::Star:
1652 Kind = MCBinaryExpr::Mul;
1653 return 6;
1654 case AsmToken::Slash:
1655 Kind = MCBinaryExpr::Div;
1656 return 6;
1657 case AsmToken::Percent:
1658 Kind = MCBinaryExpr::Mod;
1659 return 6;
1660 case AsmToken::LessLess:
1661 Kind = MCBinaryExpr::Shl;
1662 return 6;
1663 case AsmToken::GreaterGreater:
1664 Kind = ShouldUseLogicalShr ? MCBinaryExpr::LShr : MCBinaryExpr::AShr;
1665 return 6;
1666 }
1667}
1668
1669unsigned AsmParser::getBinOpPrecedence(AsmToken::TokenKind K,
1670 MCBinaryExpr::Opcode &Kind) {
1671 bool ShouldUseLogicalShr = MAI.shouldUseLogicalShr();
1672 return IsDarwin ? getDarwinBinOpPrecedence(K, Kind, ShouldUseLogicalShr)
1673 : getGNUBinOpPrecedence(MAI, K, Kind, ShouldUseLogicalShr);
1674}
1675
1676/// Parse all binary operators with precedence >= 'Precedence'.
1677/// Res contains the LHS of the expression on input.
1678bool AsmParser::parseBinOpRHS(unsigned Precedence, const MCExpr *&Res,
1679 SMLoc &EndLoc) {
1680 SMLoc StartLoc = Lexer.getLoc();
1681 while (true) {
1682 MCBinaryExpr::Opcode Kind = MCBinaryExpr::Add;
1683 unsigned TokPrec = getBinOpPrecedence(Lexer.getKind(), Kind);
1684
1685 // If the next token is lower precedence than we are allowed to eat, return
1686 // successfully with what we ate already.
1687 if (TokPrec < Precedence)
1688 return false;
1689
1690 Lex();
1691
1692 // Eat the next primary expression.
1693 const MCExpr *RHS;
1694 if (getTargetParser().parsePrimaryExpr(RHS, EndLoc))
1695 return true;
1696
1697 // If BinOp binds less tightly with RHS than the operator after RHS, let
1698 // the pending operator take RHS as its LHS.
1699 MCBinaryExpr::Opcode Dummy;
1700 unsigned NextTokPrec = getBinOpPrecedence(Lexer.getKind(), Dummy);
1701 if (TokPrec < NextTokPrec && parseBinOpRHS(TokPrec + 1, RHS, EndLoc))
1702 return true;
1703
1704 // Merge LHS and RHS according to operator.
1705 Res = MCBinaryExpr::create(Kind, Res, RHS, getContext(), StartLoc);
1706 }
1707}
1708
1709/// ParseStatement:
1710/// ::= EndOfStatement
1711/// ::= Label* Directive ...Operands... EndOfStatement
1712/// ::= Label* Identifier OperandList* EndOfStatement
1713bool AsmParser::parseStatement(ParseStatementInfo &Info,
1714 MCAsmParserSemaCallback *SI) {
1715 assert(!hasPendingError() && "parseStatement started with pending error")((!hasPendingError() && "parseStatement started with pending error"
) ? static_cast<void> (0) : __assert_fail ("!hasPendingError() && \"parseStatement started with pending error\""
, "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/llvm/lib/MC/MCParser/AsmParser.cpp"
, 1715, __PRETTY_FUNCTION__))
;
1
'?' condition is true
1716 // Eat initial spaces and comments
1717 while (Lexer.is(AsmToken::Space))
2
Loop condition is false. Execution continues on line 1719
1718 Lex();
1719 if (Lexer.is(AsmToken::EndOfStatement)) {
3
Taking false branch
1720 // if this is a line comment we can drop it safely
1721 if (getTok().getString().empty() || getTok().getString().front() == '\r' ||
1722 getTok().getString().front() == '\n')
1723 Out.AddBlankLine();
1724 Lex();
1725 return false;
1726 }
1727 // Statements always start with an identifier.
1728 AsmToken ID = getTok();
1729 SMLoc IDLoc = ID.getLoc();
1730 StringRef IDVal;
1731 int64_t LocalLabelVal = -1;
1732 StartTokLoc = ID.getLoc();
1733 if (Lexer.is(AsmToken::HashDirective))
4
Taking false branch
1734 return parseCppHashLineFilenameComment(IDLoc,
1735 !isInsideMacroInstantiation());
1736
1737 // Allow an integer followed by a ':' as a directional local label.
1738 if (Lexer.is(AsmToken::Integer)) {
5
Taking false branch
1739 LocalLabelVal = getTok().getIntVal();
1740 if (LocalLabelVal < 0) {
1741 if (!TheCondState.Ignore) {
1742 Lex(); // always eat a token
1743 return Error(IDLoc, "unexpected token at start of statement");
1744 }
1745 IDVal = "";
1746 } else {
1747 IDVal = getTok().getString();
1748 Lex(); // Consume the integer token to be used as an identifier token.
1749 if (Lexer.getKind() != AsmToken::Colon) {
1750 if (!TheCondState.Ignore) {
1751 Lex(); // always eat a token
1752 return Error(IDLoc, "unexpected token at start of statement");
1753 }
1754 }
1755 }
1756 } else if (Lexer.is(AsmToken::Dot)) {
6
Taking false branch
1757 // Treat '.' as a valid identifier in this context.
1758 Lex();
1759 IDVal = ".";
1760 } else if (Lexer.is(AsmToken::LCurly)) {
7
Taking false branch
1761 // Treat '{' as a valid identifier in this context.
1762 Lex();
1763 IDVal = "{";
1764
1765 } else if (Lexer.is(AsmToken::RCurly)) {
8
Taking false branch
1766 // Treat '}' as a valid identifier in this context.
1767 Lex();
1768 IDVal = "}";
1769 } else if (Lexer.is(AsmToken::Star) &&
1770 getTargetParser().starIsStartOfStatement()) {
1771 // Accept '*' as a valid start of statement.
1772 Lex();
1773 IDVal = "*";
1774 } else if (parseIdentifier(IDVal)) {
9
Assuming the condition is false
10
Taking false branch
1775 if (!TheCondState.Ignore) {
1776 Lex(); // always eat a token
1777 return Error(IDLoc, "unexpected token at start of statement");
1778 }
1779 IDVal = "";
1780 }
1781
1782 // Handle conditional assembly here before checking for skipping. We
1783 // have to do this so that .endif isn't skipped in a ".if 0" block for
1784 // example.
1785 StringMap<DirectiveKind>::const_iterator DirKindIt =
1786 DirectiveKindMap.find(IDVal.lower());
1787 DirectiveKind DirKind = (DirKindIt == DirectiveKindMap.end())
11
'?' condition is false
1788 ? DK_NO_DIRECTIVE
1789 : DirKindIt->getValue();
1790 switch (DirKind) {
12
Control jumps to the 'default' case at line 1791
1791 default:
1792 break;
13
Execution continues on line 1828
1793 case DK_IF:
1794 case DK_IFEQ:
1795 case DK_IFGE:
1796 case DK_IFGT:
1797 case DK_IFLE:
1798 case DK_IFLT:
1799 case DK_IFNE:
1800 return parseDirectiveIf(IDLoc, DirKind);
1801 case DK_IFB:
1802 return parseDirectiveIfb(IDLoc, true);
1803 case DK_IFNB:
1804 return parseDirectiveIfb(IDLoc, false);
1805 case DK_IFC:
1806 return parseDirectiveIfc(IDLoc, true);
1807 case DK_IFEQS:
1808 return parseDirectiveIfeqs(IDLoc, true);
1809 case DK_IFNC:
1810 return parseDirectiveIfc(IDLoc, false);
1811 case DK_IFNES:
1812 return parseDirectiveIfeqs(IDLoc, false);
1813 case DK_IFDEF:
1814 return parseDirectiveIfdef(IDLoc, true);
1815 case DK_IFNDEF:
1816 case DK_IFNOTDEF:
1817 return parseDirectiveIfdef(IDLoc, false);
1818 case DK_ELSEIF:
1819 return parseDirectiveElseIf(IDLoc);
1820 case DK_ELSE:
1821 return parseDirectiveElse(IDLoc);
1822 case DK_ENDIF:
1823 return parseDirectiveEndIf(IDLoc);
1824 }
1825
1826 // Ignore the statement if in the middle of inactive conditional
1827 // (e.g. ".if 0").
1828 if (TheCondState.Ignore) {
14
Assuming field 'Ignore' is false
15
Taking false branch
1829 eatToEndOfStatement();
1830 return false;
1831 }
1832
1833 // FIXME: Recurse on local labels?
1834
1835 // See what kind of statement we have.
1836 switch (Lexer.getKind()) {
16
Control jumps to the 'default' case at line 1913
1837 case AsmToken::Colon: {
1838 if (!getTargetParser().isLabel(ID))
1839 break;
1840 if (checkForValidSection())
1841 return true;
1842
1843 // identifier ':' -> Label.
1844 Lex();
1845
1846 // Diagnose attempt to use '.' as a label.
1847 if (IDVal == ".")
1848 return Error(IDLoc, "invalid use of pseudo-symbol '.' as a label");
1849
1850 // Diagnose attempt to use a variable as a label.
1851 //
1852 // FIXME: Diagnostics. Note the location of the definition as a label.
1853 // FIXME: This doesn't diagnose assignment to a symbol which has been
1854 // implicitly marked as external.
1855 MCSymbol *Sym;
1856 if (LocalLabelVal == -1) {
1857 if (ParsingMSInlineAsm && SI) {
1858 StringRef RewrittenLabel =
1859 SI->LookupInlineAsmLabel(IDVal, getSourceManager(), IDLoc, true);
1860 assert(!RewrittenLabel.empty() &&((!RewrittenLabel.empty() && "We should have an internal name here."
) ? static_cast<void> (0) : __assert_fail ("!RewrittenLabel.empty() && \"We should have an internal name here.\""
, "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/llvm/lib/MC/MCParser/AsmParser.cpp"
, 1861, __PRETTY_FUNCTION__))
1861 "We should have an internal name here.")((!RewrittenLabel.empty() && "We should have an internal name here."
) ? static_cast<void> (0) : __assert_fail ("!RewrittenLabel.empty() && \"We should have an internal name here.\""
, "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/llvm/lib/MC/MCParser/AsmParser.cpp"
, 1861, __PRETTY_FUNCTION__))
;
1862 Info.AsmRewrites->emplace_back(AOK_Label, IDLoc, IDVal.size(),
1863 RewrittenLabel);
1864 IDVal = RewrittenLabel;
1865 }
1866 Sym = getContext().getOrCreateSymbol(IDVal);
1867 } else
1868 Sym = Ctx.createDirectionalLocalSymbol(LocalLabelVal);
1869 // End of Labels should be treated as end of line for lexing
1870 // purposes but that information is not available to the Lexer who
1871 // does not understand Labels. This may cause us to see a Hash
1872 // here instead of a preprocessor line comment.
1873 if (getTok().is(AsmToken::Hash)) {
1874 StringRef CommentStr = parseStringToEndOfStatement();
1875 Lexer.Lex();
1876 Lexer.UnLex(AsmToken(AsmToken::EndOfStatement, CommentStr));
1877 }
1878
1879 // Consume any end of statement token, if present, to avoid spurious
1880 // AddBlankLine calls().
1881 if (getTok().is(AsmToken::EndOfStatement)) {
1882 Lex();
1883 }
1884
1885 if (discardLTOSymbol(IDVal))
1886 return false;
1887
1888 getTargetParser().doBeforeLabelEmit(Sym);
1889
1890 // Emit the label.
1891 if (!getTargetParser().isParsingMSInlineAsm())
1892 Out.emitLabel(Sym, IDLoc);
1893
1894 // If we are generating dwarf for assembly source files then gather the
1895 // info to make a dwarf label entry for this label if needed.
1896 if (enabledGenDwarfForAssembly())
1897 MCGenDwarfLabelEntry::Make(Sym, &getStreamer(), getSourceManager(),
1898 IDLoc);
1899
1900 getTargetParser().onLabelParsed(Sym);
1901
1902 return false;
1903 }
1904
1905 case AsmToken::Equal:
1906 if (!getTargetParser().equalIsAsmAssignment())
1907 break;
1908 // identifier '=' ... -> assignment statement
1909 Lex();
1910
1911 return parseAssignment(IDVal, true);
1912
1913 default: // Normal instruction or directive.
1914 break;
17
Execution continues on line 1918
1915 }
1916
1917 // If macros are enabled, check to see if this is a macro instantiation.
1918 if (areMacrosEnabled())
18
Assuming the condition is false
19
Taking false branch
1919 if (const MCAsmMacro *M = getContext().lookupMacro(IDVal)) {
1920 return handleMacroEntry(M, IDLoc);
1921 }
1922
1923 // Otherwise, we have a normal instruction or directive.
1924
1925 // Directives start with "."
1926 if (IDVal.startswith(".") && IDVal != ".") {
20
Assuming the condition is true
21
Taking true branch
1927 // There are several entities interested in parsing directives:
1928 //
1929 // 1. The target-specific assembly parser. Some directives are target
1930 // specific or may potentially behave differently on certain targets.
1931 // 2. Asm parser extensions. For example, platform-specific parsers
1932 // (like the ELF parser) register themselves as extensions.
1933 // 3. The generic directive parser implemented by this class. These are
1934 // all the directives that behave in a target and platform independent
1935 // manner, or at least have a default behavior that's shared between
1936 // all targets and platforms.
1937
1938 getTargetParser().flushPendingInstructions(getStreamer());
1939
1940 SMLoc StartTokLoc = getTok().getLoc();
1941 bool TPDirectiveReturn = getTargetParser().ParseDirective(ID);
1942
1943 if (hasPendingError())
22
Taking false branch
1944 return true;
1945 // Currently the return value should be true if we are
1946 // uninterested but as this is at odds with the standard parsing
1947 // convention (return true = error) we have instances of a parsed
1948 // directive that fails returning true as an error. Catch these
1949 // cases as best as possible errors here.
1950 if (TPDirectiveReturn && StartTokLoc != getTok().getLoc())
23
Assuming 'TPDirectiveReturn' is true
24
Taking false branch
1951 return true;
1952 // Return if we did some parsing or believe we succeeded.
1953 if (!TPDirectiveReturn
24.1
'TPDirectiveReturn' is true
24.1
'TPDirectiveReturn' is true
24.1
'TPDirectiveReturn' is true
|| StartTokLoc != getTok().getLoc())
25
Taking false branch
1954 return false;
1955
1956 // Next, check the extension directive map to see if any extension has
1957 // registered itself to parse this directive.
1958 std::pair<MCAsmParserExtension *, DirectiveHandler> Handler =
1959 ExtensionDirectiveMap.lookup(IDVal);
1960 if (Handler.first)
26
Assuming field 'first' is null
27
Taking false branch
1961 return (*Handler.second)(Handler.first, IDVal, IDLoc);
1962
1963 // Finally, if no one else is interested in this directive, it must be
1964 // generic and familiar to this class.
1965 switch (DirKind) {
28
Control jumps to 'case DK_PSEUDO_PROBE:' at line 2226
1966 default:
1967 break;
1968 case DK_SET:
1969 case DK_EQU:
1970 return parseDirectiveSet(IDVal, true);
1971 case DK_EQUIV:
1972 return parseDirectiveSet(IDVal, false);
1973 case DK_ASCII:
1974 return parseDirectiveAscii(IDVal, false);
1975 case DK_ASCIZ:
1976 case DK_STRING:
1977 return parseDirectiveAscii(IDVal, true);
1978 case DK_BYTE:
1979 case DK_DC_B:
1980 return parseDirectiveValue(IDVal, 1);
1981 case DK_DC:
1982 case DK_DC_W:
1983 case DK_SHORT:
1984 case DK_VALUE:
1985 case DK_2BYTE:
1986 return parseDirectiveValue(IDVal, 2);
1987 case DK_LONG:
1988 case DK_INT:
1989 case DK_4BYTE:
1990 case DK_DC_L:
1991 return parseDirectiveValue(IDVal, 4);
1992 case DK_QUAD:
1993 case DK_8BYTE:
1994 return parseDirectiveValue(IDVal, 8);
1995 case DK_DC_A:
1996 return parseDirectiveValue(
1997 IDVal, getContext().getAsmInfo()->getCodePointerSize());
1998 case DK_OCTA:
1999 return parseDirectiveOctaValue(IDVal);
2000 case DK_SINGLE:
2001 case DK_FLOAT:
2002 case DK_DC_S:
2003 return parseDirectiveRealValue(IDVal, APFloat::IEEEsingle());
2004 case DK_DOUBLE:
2005 case DK_DC_D:
2006 return parseDirectiveRealValue(IDVal, APFloat::IEEEdouble());
2007 case DK_ALIGN: {
2008 bool IsPow2 = !getContext().getAsmInfo()->getAlignmentIsInBytes();
2009 return parseDirectiveAlign(IsPow2, /*ExprSize=*/1);
2010 }
2011 case DK_ALIGN32: {
2012 bool IsPow2 = !getContext().getAsmInfo()->getAlignmentIsInBytes();
2013 return parseDirectiveAlign(IsPow2, /*ExprSize=*/4);
2014 }
2015 case DK_BALIGN:
2016 return parseDirectiveAlign(/*IsPow2=*/false, /*ExprSize=*/1);
2017 case DK_BALIGNW:
2018 return parseDirectiveAlign(/*IsPow2=*/false, /*ExprSize=*/2);
2019 case DK_BALIGNL:
2020 return parseDirectiveAlign(/*IsPow2=*/false, /*ExprSize=*/4);
2021 case DK_P2ALIGN:
2022 return parseDirectiveAlign(/*IsPow2=*/true, /*ExprSize=*/1);
2023 case DK_P2ALIGNW:
2024 return parseDirectiveAlign(/*IsPow2=*/true, /*ExprSize=*/2);
2025 case DK_P2ALIGNL:
2026 return parseDirectiveAlign(/*IsPow2=*/true, /*ExprSize=*/4);
2027 case DK_ORG:
2028 return parseDirectiveOrg();
2029 case DK_FILL:
2030 return parseDirectiveFill();
2031 case DK_ZERO:
2032 return parseDirectiveZero();
2033 case DK_EXTERN:
2034 eatToEndOfStatement(); // .extern is the default, ignore it.
2035 return false;
2036 case DK_GLOBL:
2037 case DK_GLOBAL:
2038 return parseDirectiveSymbolAttribute(MCSA_Global);
2039 case DK_LAZY_REFERENCE:
2040 return parseDirectiveSymbolAttribute(MCSA_LazyReference);
2041 case DK_NO_DEAD_STRIP:
2042 return parseDirectiveSymbolAttribute(MCSA_NoDeadStrip);
2043 case DK_SYMBOL_RESOLVER:
2044 return parseDirectiveSymbolAttribute(MCSA_SymbolResolver);
2045 case DK_PRIVATE_EXTERN:
2046 return parseDirectiveSymbolAttribute(MCSA_PrivateExtern);
2047 case DK_REFERENCE:
2048 return parseDirectiveSymbolAttribute(MCSA_Reference);
2049 case DK_WEAK_DEFINITION:
2050 return parseDirectiveSymbolAttribute(MCSA_WeakDefinition);
2051 case DK_WEAK_REFERENCE:
2052 return parseDirectiveSymbolAttribute(MCSA_WeakReference);
2053 case DK_WEAK_DEF_CAN_BE_HIDDEN:
2054 return parseDirectiveSymbolAttribute(MCSA_WeakDefAutoPrivate);
2055 case DK_COLD:
2056 return parseDirectiveSymbolAttribute(MCSA_Cold);
2057 case DK_COMM:
2058 case DK_COMMON:
2059 return parseDirectiveComm(/*IsLocal=*/false);
2060 case DK_LCOMM:
2061 return parseDirectiveComm(/*IsLocal=*/true);
2062 case DK_ABORT:
2063 return parseDirectiveAbort();
2064 case DK_INCLUDE:
2065 return parseDirectiveInclude();
2066 case DK_INCBIN:
2067 return parseDirectiveIncbin();
2068 case DK_CODE16:
2069 case DK_CODE16GCC:
2070 return TokError(Twine(IDVal) +
2071 " not currently supported for this target");
2072 case DK_REPT:
2073 return parseDirectiveRept(IDLoc, IDVal);
2074 case DK_IRP:
2075 return parseDirectiveIrp(IDLoc);
2076 case DK_IRPC:
2077 return parseDirectiveIrpc(IDLoc);
2078 case DK_ENDR:
2079 return parseDirectiveEndr(IDLoc);
2080 case DK_BUNDLE_ALIGN_MODE:
2081 return parseDirectiveBundleAlignMode();
2082 case DK_BUNDLE_LOCK:
2083 return parseDirectiveBundleLock();
2084 case DK_BUNDLE_UNLOCK:
2085 return parseDirectiveBundleUnlock();
2086 case DK_SLEB128:
2087 return parseDirectiveLEB128(true);
2088 case DK_ULEB128:
2089 return parseDirectiveLEB128(false);
2090 case DK_SPACE:
2091 case DK_SKIP:
2092 return parseDirectiveSpace(IDVal);
2093 case DK_FILE:
2094 return parseDirectiveFile(IDLoc);
2095 case DK_LINE:
2096 return parseDirectiveLine();
2097 case DK_LOC:
2098 return parseDirectiveLoc();
2099 case DK_STABS:
2100 return parseDirectiveStabs();
2101 case DK_CV_FILE:
2102 return parseDirectiveCVFile();
2103 case DK_CV_FUNC_ID:
2104 return parseDirectiveCVFuncId();
2105 case DK_CV_INLINE_SITE_ID:
2106 return parseDirectiveCVInlineSiteId();
2107 case DK_CV_LOC:
2108 return parseDirectiveCVLoc();
2109 case DK_CV_LINETABLE:
2110 return parseDirectiveCVLinetable();
2111 case DK_CV_INLINE_LINETABLE:
2112 return parseDirectiveCVInlineLinetable();
2113 case DK_CV_DEF_RANGE:
2114 return parseDirectiveCVDefRange();
2115 case DK_CV_STRING:
2116 return parseDirectiveCVString();
2117 case DK_CV_STRINGTABLE:
2118 return parseDirectiveCVStringTable();
2119 case DK_CV_FILECHECKSUMS:
2120 return parseDirectiveCVFileChecksums();
2121 case DK_CV_FILECHECKSUM_OFFSET:
2122 return parseDirectiveCVFileChecksumOffset();
2123 case DK_CV_FPO_DATA:
2124 return parseDirectiveCVFPOData();
2125 case DK_CFI_SECTIONS:
2126 return parseDirectiveCFISections();
2127 case DK_CFI_STARTPROC:
2128 return parseDirectiveCFIStartProc();
2129 case DK_CFI_ENDPROC:
2130 return parseDirectiveCFIEndProc();
2131 case DK_CFI_DEF_CFA:
2132 return parseDirectiveCFIDefCfa(IDLoc);
2133 case DK_CFI_DEF_CFA_OFFSET:
2134 return parseDirectiveCFIDefCfaOffset();
2135 case DK_CFI_ADJUST_CFA_OFFSET:
2136 return parseDirectiveCFIAdjustCfaOffset();
2137 case DK_CFI_DEF_CFA_REGISTER:
2138 return parseDirectiveCFIDefCfaRegister(IDLoc);
2139 case DK_CFI_OFFSET:
2140 return parseDirectiveCFIOffset(IDLoc);
2141 case DK_CFI_REL_OFFSET:
2142 return parseDirectiveCFIRelOffset(IDLoc);
2143 case DK_CFI_PERSONALITY:
2144 return parseDirectiveCFIPersonalityOrLsda(true);
2145 case DK_CFI_LSDA:
2146 return parseDirectiveCFIPersonalityOrLsda(false);
2147 case DK_CFI_REMEMBER_STATE:
2148 return parseDirectiveCFIRememberState();
2149 case DK_CFI_RESTORE_STATE:
2150 return parseDirectiveCFIRestoreState();
2151 case DK_CFI_SAME_VALUE:
2152 return parseDirectiveCFISameValue(IDLoc);
2153 case DK_CFI_RESTORE:
2154 return parseDirectiveCFIRestore(IDLoc);
2155 case DK_CFI_ESCAPE:
2156 return parseDirectiveCFIEscape();
2157 case DK_CFI_RETURN_COLUMN:
2158 return parseDirectiveCFIReturnColumn(IDLoc);
2159 case DK_CFI_SIGNAL_FRAME:
2160 return parseDirectiveCFISignalFrame();
2161 case DK_CFI_UNDEFINED:
2162 return parseDirectiveCFIUndefined(IDLoc);
2163 case DK_CFI_REGISTER:
2164 return parseDirectiveCFIRegister(IDLoc);
2165 case DK_CFI_WINDOW_SAVE:
2166 return parseDirectiveCFIWindowSave();
2167 case DK_MACROS_ON:
2168 case DK_MACROS_OFF:
2169 return parseDirectiveMacrosOnOff(IDVal);
2170 case DK_MACRO:
2171 return parseDirectiveMacro(IDLoc);
2172 case DK_ALTMACRO:
2173 case DK_NOALTMACRO:
2174 return parseDirectiveAltmacro(IDVal);
2175 case DK_EXITM:
2176 return parseDirectiveExitMacro(IDVal);
2177 case DK_ENDM:
2178 case DK_ENDMACRO:
2179 return parseDirectiveEndMacro(IDVal);
2180 case DK_PURGEM:
2181 return parseDirectivePurgeMacro(IDLoc);
2182 case DK_END:
2183 return parseDirectiveEnd(IDLoc);
2184 case DK_ERR:
2185 return parseDirectiveError(IDLoc, false);
2186 case DK_ERROR:
2187 return parseDirectiveError(IDLoc, true);
2188 case DK_WARNING:
2189 return parseDirectiveWarning(IDLoc);
2190 case DK_RELOC:
2191 return parseDirectiveReloc(IDLoc);
2192 case DK_DCB:
2193 case DK_DCB_W:
2194 return parseDirectiveDCB(IDVal, 2);
2195 case DK_DCB_B:
2196 return parseDirectiveDCB(IDVal, 1);
2197 case DK_DCB_D:
2198 return parseDirectiveRealDCB(IDVal, APFloat::IEEEdouble());
2199 case DK_DCB_L:
2200 return parseDirectiveDCB(IDVal, 4);
2201 case DK_DCB_S:
2202 return parseDirectiveRealDCB(IDVal, APFloat::IEEEsingle());
2203 case DK_DC_X:
2204 case DK_DCB_X:
2205 return TokError(Twine(IDVal) +
2206 " not currently supported for this target");
2207 case DK_DS:
2208 case DK_DS_W:
2209 return parseDirectiveDS(IDVal, 2);
2210 case DK_DS_B:
2211 return parseDirectiveDS(IDVal, 1);
2212 case DK_DS_D:
2213 return parseDirectiveDS(IDVal, 8);
2214 case DK_DS_L:
2215 case DK_DS_S:
2216 return parseDirectiveDS(IDVal, 4);
2217 case DK_DS_P:
2218 case DK_DS_X:
2219 return parseDirectiveDS(IDVal, 12);
2220 case DK_PRINT:
2221 return parseDirectivePrint(IDLoc);
2222 case DK_ADDRSIG:
2223 return parseDirectiveAddrsig();
2224 case DK_ADDRSIG_SYM:
2225 return parseDirectiveAddrsigSym();
2226 case DK_PSEUDO_PROBE:
2227 return parseDirectivePseudoProbe();
29
Calling 'AsmParser::parseDirectivePseudoProbe'
2228 case DK_LTO_DISCARD:
2229 return parseDirectiveLTODiscard();
2230 }
2231
2232 return Error(IDLoc, "unknown directive");
2233 }
2234
2235 // __asm _emit or __asm __emit
2236 if (ParsingMSInlineAsm && (IDVal == "_emit" || IDVal == "__emit" ||
2237 IDVal == "_EMIT" || IDVal == "__EMIT"))
2238 return parseDirectiveMSEmit(IDLoc, Info, IDVal.size());
2239
2240 // __asm align
2241 if (ParsingMSInlineAsm && (IDVal == "align" || IDVal == "ALIGN"))
2242 return parseDirectiveMSAlign(IDLoc, Info);
2243
2244 if (ParsingMSInlineAsm && (IDVal == "even" || IDVal == "EVEN"))
2245 Info.AsmRewrites->emplace_back(AOK_EVEN, IDLoc, 4);
2246 if (checkForValidSection())
2247 return true;
2248
2249 // Canonicalize the opcode to lower case.
2250 std::string OpcodeStr = IDVal.lower();
2251 ParseInstructionInfo IInfo(Info.AsmRewrites);
2252 bool ParseHadError = getTargetParser().ParseInstruction(IInfo, OpcodeStr, ID,
2253 Info.ParsedOperands);
2254 Info.ParseError = ParseHadError;
2255
2256 // Dump the parsed representation, if requested.
2257 if (getShowParsedOperands()) {
2258 SmallString<256> Str;
2259 raw_svector_ostream OS(Str);
2260 OS << "parsed instruction: [";
2261 for (unsigned i = 0; i != Info.ParsedOperands.size(); ++i) {
2262 if (i != 0)
2263 OS << ", ";
2264 Info.ParsedOperands[i]->print(OS);
2265 }
2266 OS << "]";
2267
2268 printMessage(IDLoc, SourceMgr::DK_Note, OS.str());
2269 }
2270
2271 // Fail even if ParseInstruction erroneously returns false.
2272 if (hasPendingError() || ParseHadError)
2273 return true;
2274
2275 // If we are generating dwarf for the current section then generate a .loc
2276 // directive for the instruction.
2277 if (!ParseHadError && enabledGenDwarfForAssembly() &&
2278 getContext().getGenDwarfSectionSyms().count(
2279 getStreamer().getCurrentSectionOnly())) {
2280 unsigned Line;
2281 if (ActiveMacros.empty())
2282 Line = SrcMgr.FindLineNumber(IDLoc, CurBuffer);
2283 else
2284 Line = SrcMgr.FindLineNumber(ActiveMacros.front()->InstantiationLoc,
2285 ActiveMacros.front()->ExitBuffer);
2286
2287 // If we previously parsed a cpp hash file line comment then make sure the
2288 // current Dwarf File is for the CppHashFilename if not then emit the
2289 // Dwarf File table for it and adjust the line number for the .loc.
2290 if (!CppHashInfo.Filename.empty()) {
2291 unsigned FileNumber = getStreamer().emitDwarfFileDirective(
2292 0, StringRef(), CppHashInfo.Filename);
2293 getContext().setGenDwarfFileNumber(FileNumber);
2294
2295 unsigned CppHashLocLineNo =
2296 SrcMgr.FindLineNumber(CppHashInfo.Loc, CppHashInfo.Buf);
2297 Line = CppHashInfo.LineNumber - 1 + (Line - CppHashLocLineNo);
2298 }
2299
2300 getStreamer().emitDwarfLocDirective(
2301 getContext().getGenDwarfFileNumber(), Line, 0,
2302 DWARF2_LINE_DEFAULT_IS_STMT1 ? DWARF2_FLAG_IS_STMT(1 << 0) : 0, 0, 0,
2303 StringRef());
2304 }
2305
2306 // If parsing succeeded, match the instruction.
2307 if (!ParseHadError) {
2308 uint64_t ErrorInfo;
2309 if (getTargetParser().MatchAndEmitInstruction(
2310 IDLoc, Info.Opcode, Info.ParsedOperands, Out, ErrorInfo,
2311 getTargetParser().isParsingMSInlineAsm()))
2312 return true;
2313 }
2314 return false;
2315}
2316
2317// Parse and erase curly braces marking block start/end
2318bool
2319AsmParser::parseCurlyBlockScope(SmallVectorImpl<AsmRewrite> &AsmStrRewrites) {
2320 // Identify curly brace marking block start/end
2321 if (Lexer.isNot(AsmToken::LCurly) && Lexer.isNot(AsmToken::RCurly))
2322 return false;
2323
2324 SMLoc StartLoc = Lexer.getLoc();
2325 Lex(); // Eat the brace
2326 if (Lexer.is(AsmToken::EndOfStatement))
2327 Lex(); // Eat EndOfStatement following the brace
2328
2329 // Erase the block start/end brace from the output asm string
2330 AsmStrRewrites.emplace_back(AOK_Skip, StartLoc, Lexer.getLoc().getPointer() -
2331 StartLoc.getPointer());
2332 return true;
2333}
2334
2335/// parseCppHashLineFilenameComment as this:
2336/// ::= # number "filename"
2337bool AsmParser::parseCppHashLineFilenameComment(SMLoc L, bool SaveLocInfo) {
2338 Lex(); // Eat the hash token.
2339 // Lexer only ever emits HashDirective if it fully formed if it's
2340 // done the checking already so this is an internal error.
2341 assert(getTok().is(AsmToken::Integer) &&((getTok().is(AsmToken::Integer) && "Lexing Cpp line comment: Expected Integer"
) ? static_cast<void> (0) : __assert_fail ("getTok().is(AsmToken::Integer) && \"Lexing Cpp line comment: Expected Integer\""
, "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/llvm/lib/MC/MCParser/AsmParser.cpp"
, 2342, __PRETTY_FUNCTION__))
2342 "Lexing Cpp line comment: Expected Integer")((getTok().is(AsmToken::Integer) && "Lexing Cpp line comment: Expected Integer"
) ? static_cast<void> (0) : __assert_fail ("getTok().is(AsmToken::Integer) && \"Lexing Cpp line comment: Expected Integer\""
, "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/llvm/lib/MC/MCParser/AsmParser.cpp"
, 2342, __PRETTY_FUNCTION__))
;
2343 int64_t LineNumber = getTok().getIntVal();
2344 Lex();
2345 assert(getTok().is(AsmToken::String) &&((getTok().is(AsmToken::String) && "Lexing Cpp line comment: Expected String"
) ? static_cast<void> (0) : __assert_fail ("getTok().is(AsmToken::String) && \"Lexing Cpp line comment: Expected String\""
, "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/llvm/lib/MC/MCParser/AsmParser.cpp"
, 2346, __PRETTY_FUNCTION__))
2346 "Lexing Cpp line comment: Expected String")((getTok().is(AsmToken::String) && "Lexing Cpp line comment: Expected String"
) ? static_cast<void> (0) : __assert_fail ("getTok().is(AsmToken::String) && \"Lexing Cpp line comment: Expected String\""
, "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/llvm/lib/MC/MCParser/AsmParser.cpp"
, 2346, __PRETTY_FUNCTION__))
;
2347 StringRef Filename = getTok().getString();
2348 Lex();
2349
2350 if (!SaveLocInfo)
2351 return false;
2352
2353 // Get rid of the enclosing quotes.
2354 Filename = Filename.substr(1, Filename.size() - 2);
2355
2356 // Save the SMLoc, Filename and LineNumber for later use by diagnostics
2357 // and possibly DWARF file info.
2358 CppHashInfo.Loc = L;
2359 CppHashInfo.Filename = Filename;
2360 CppHashInfo.LineNumber = LineNumber;
2361 CppHashInfo.Buf = CurBuffer;
2362 if (FirstCppHashFilename.empty())
2363 FirstCppHashFilename = Filename;
2364 return false;
2365}
2366
2367/// will use the last parsed cpp hash line filename comment
2368/// for the Filename and LineNo if any in the diagnostic.
2369void AsmParser::DiagHandler(const SMDiagnostic &Diag, void *Context) {
2370 auto *Parser = static_cast<AsmParser *>(Context);
2371 raw_ostream &OS = errs();
2372
2373 const SourceMgr &DiagSrcMgr = *Diag.getSourceMgr();
2374 SMLoc DiagLoc = Diag.getLoc();
2375 unsigned DiagBuf = DiagSrcMgr.FindBufferContainingLoc(DiagLoc);
2376 unsigned CppHashBuf =
2377 Parser->SrcMgr.FindBufferContainingLoc(Parser->CppHashInfo.Loc);
2378
2379 // Like SourceMgr::printMessage() we need to print the include stack if any
2380 // before printing the message.
2381 unsigned DiagCurBuffer = DiagSrcMgr.FindBufferContainingLoc(DiagLoc);
2382 if (!Parser->SavedDiagHandler && DiagCurBuffer &&
2383 DiagCurBuffer != DiagSrcMgr.getMainFileID()) {
2384 SMLoc ParentIncludeLoc = DiagSrcMgr.getParentIncludeLoc(DiagCurBuffer);
2385 DiagSrcMgr.PrintIncludeStack(ParentIncludeLoc, OS);
2386 }
2387
2388 // If we have not parsed a cpp hash line filename comment or the source
2389 // manager changed or buffer changed (like in a nested include) then just
2390 // print the normal diagnostic using its Filename and LineNo.
2391 if (!Parser->CppHashInfo.LineNumber || DiagBuf != CppHashBuf) {
2392 if (Parser->SavedDiagHandler)
2393 Parser->SavedDiagHandler(Diag, Parser->SavedDiagContext);
2394 else
2395 Parser->getContext().diagnose(Diag);
2396 return;
2397 }
2398
2399 // Use the CppHashFilename and calculate a line number based on the
2400 // CppHashInfo.Loc and CppHashInfo.LineNumber relative to this Diag's SMLoc
2401 // for the diagnostic.
2402 const std::string &Filename = std::string(Parser->CppHashInfo.Filename);
2403
2404 int DiagLocLineNo = DiagSrcMgr.FindLineNumber(DiagLoc, DiagBuf);
2405 int CppHashLocLineNo =
2406 Parser->SrcMgr.FindLineNumber(Parser->CppHashInfo.Loc, CppHashBuf);
2407 int LineNo =
2408 Parser->CppHashInfo.LineNumber - 1 + (DiagLocLineNo - CppHashLocLineNo);
2409
2410 SMDiagnostic NewDiag(*Diag.getSourceMgr(), Diag.getLoc(), Filename, LineNo,
2411 Diag.getColumnNo(), Diag.getKind(), Diag.getMessage(),
2412 Diag.getLineContents(), Diag.getRanges());
2413
2414 if (Parser->SavedDiagHandler)
2415 Parser->SavedDiagHandler(Diag, Parser->SavedDiagContext);
2416 else
2417 Parser->getContext().diagnose(NewDiag);
2418}
2419
2420// FIXME: This is mostly duplicated from the function in AsmLexer.cpp. The
2421// difference being that that function accepts '@' as part of identifiers and
2422// we can't do that. AsmLexer.cpp should probably be changed to handle
2423// '@' as a special case when needed.
2424static bool isIdentifierChar(char c) {
2425 return isalnum(static_cast<unsigned char>(c)) || c == '_' || c == '$' ||
2426 c == '.';
2427}
2428
2429bool AsmParser::expandMacro(raw_svector_ostream &OS, StringRef Body,
2430 ArrayRef<MCAsmMacroParameter> Parameters,
2431 ArrayRef<MCAsmMacroArgument> A,
2432 bool EnableAtPseudoVariable, SMLoc L) {
2433 unsigned NParameters = Parameters.size();
2434 bool HasVararg = NParameters ? Parameters.back().Vararg : false;
2435 if ((!IsDarwin || NParameters != 0) && NParameters != A.size())
2436 return Error(L, "Wrong number of arguments");
2437
2438 // A macro without parameters is handled differently on Darwin:
2439 // gas accepts no arguments and does no substitutions
2440 while (!Body.empty()) {
2441 // Scan for the next substitution.
2442 std::size_t End = Body.size(), Pos = 0;
2443 for (; Pos != End; ++Pos) {
2444 // Check for a substitution or escape.
2445 if (IsDarwin && !NParameters) {
2446 // This macro has no parameters, look for $0, $1, etc.
2447 if (Body[Pos] != '$' || Pos + 1 == End)
2448 continue;
2449
2450 char Next = Body[Pos + 1];
2451 if (Next == '$' || Next == 'n' ||
2452 isdigit(static_cast<unsigned char>(Next)))
2453 break;
2454 } else {
2455 // This macro has parameters, look for \foo, \bar, etc.
2456 if (Body[Pos] == '\\' && Pos + 1 != End)
2457 break;
2458 }
2459 }
2460
2461 // Add the prefix.
2462 OS << Body.slice(0, Pos);
2463
2464 // Check if we reached the end.
2465 if (Pos == End)
2466 break;
2467
2468 if (IsDarwin && !NParameters) {
2469 switch (Body[Pos + 1]) {
2470 // $$ => $
2471 case '$':
2472 OS << '$';
2473 break;
2474
2475 // $n => number of arguments
2476 case 'n':
2477 OS << A.size();
2478 break;
2479
2480 // $[0-9] => argument
2481 default: {
2482 // Missing arguments are ignored.
2483 unsigned Index = Body[Pos + 1] - '0';
2484 if (Index >= A.size())
2485 break;
2486
2487 // Otherwise substitute with the token values, with spaces eliminated.
2488 for (const AsmToken &Token : A[Index])
2489 OS << Token.getString();
2490 break;
2491 }
2492 }
2493 Pos += 2;
2494 } else {
2495 unsigned I = Pos + 1;
2496
2497 // Check for the \@ pseudo-variable.
2498 if (EnableAtPseudoVariable && Body[I] == '@' && I + 1 != End)
2499 ++I;
2500 else
2501 while (isIdentifierChar(Body[I]) && I + 1 != End)
2502 ++I;
2503
2504 const char *Begin = Body.data() + Pos + 1;
2505 StringRef Argument(Begin, I - (Pos + 1));
2506 unsigned Index = 0;
2507
2508 if (Argument == "@") {
2509 OS << NumOfMacroInstantiations;
2510 Pos += 2;
2511 } else {
2512 for (; Index < NParameters; ++Index)
2513 if (Parameters[Index].Name == Argument)
2514 break;
2515
2516 if (Index == NParameters) {
2517 if (Body[Pos + 1] == '(' && Body[Pos + 2] == ')')
2518 Pos += 3;
2519 else {
2520 OS << '\\' << Argument;
2521 Pos = I;
2522 }
2523 } else {
2524 bool VarargParameter = HasVararg && Index == (NParameters - 1);
2525 for (const AsmToken &Token : A[Index])
2526 // For altmacro mode, you can write '%expr'.
2527 // The prefix '%' evaluates the expression 'expr'
2528 // and uses the result as a string (e.g. replace %(1+2) with the
2529 // string "3").
2530 // Here, we identify the integer token which is the result of the
2531 // absolute expression evaluation and replace it with its string
2532 // representation.
2533 if (AltMacroMode && Token.getString().front() == '%' &&
2534 Token.is(AsmToken::Integer))
2535 // Emit an integer value to the buffer.
2536 OS << Token.getIntVal();
2537 // Only Token that was validated as a string and begins with '<'
2538 // is considered altMacroString!!!
2539 else if (AltMacroMode && Token.getString().front() == '<' &&
2540 Token.is(AsmToken::String)) {
2541 OS << angleBracketString(Token.getStringContents());
2542 }
2543 // We expect no quotes around the string's contents when
2544 // parsing for varargs.
2545 else if (Token.isNot(AsmToken::String) || VarargParameter)
2546 OS << Token.getString();
2547 else
2548 OS << Token.getStringContents();
2549
2550 Pos += 1 + Argument.size();
2551 }
2552 }
2553 }
2554 // Update the scan point.
2555 Body = Body.substr(Pos);
2556 }
2557
2558 return false;
2559}
2560
2561static bool isOperator(AsmToken::TokenKind kind) {
2562 switch (kind) {
2563 default:
2564 return false;
2565 case AsmToken::Plus:
2566 case AsmToken::Minus:
2567 case AsmToken::Tilde:
2568 case AsmToken::Slash:
2569 case AsmToken::Star:
2570 case AsmToken::Dot:
2571 case AsmToken::Equal:
2572 case AsmToken::EqualEqual:
2573 case AsmToken::Pipe:
2574 case AsmToken::PipePipe:
2575 case AsmToken::Caret:
2576 case AsmToken::Amp:
2577 case AsmToken::AmpAmp:
2578 case AsmToken::Exclaim:
2579 case AsmToken::ExclaimEqual:
2580 case AsmToken::Less:
2581 case AsmToken::LessEqual:
2582 case AsmToken::LessLess:
2583 case AsmToken::LessGreater:
2584 case AsmToken::Greater:
2585 case AsmToken::GreaterEqual:
2586 case AsmToken::GreaterGreater:
2587 return true;
2588 }
2589}
2590
2591namespace {
2592
2593class AsmLexerSkipSpaceRAII {
2594public:
2595 AsmLexerSkipSpaceRAII(AsmLexer &Lexer, bool SkipSpace) : Lexer(Lexer) {
2596 Lexer.setSkipSpace(SkipSpace);
2597 }
2598
2599 ~AsmLexerSkipSpaceRAII() {
2600 Lexer.setSkipSpace(true);
2601 }
2602
2603private:
2604 AsmLexer &Lexer;
2605};
2606
2607} // end anonymous namespace
2608
2609bool AsmParser::parseMacroArgument(MCAsmMacroArgument &MA, bool Vararg) {
2610
2611 if (Vararg) {
2612 if (Lexer.isNot(AsmToken::EndOfStatement)) {
2613 StringRef Str = parseStringToEndOfStatement();
2614 MA.emplace_back(AsmToken::String, Str);
2615 }
2616 return false;
2617 }
2618
2619 unsigned ParenLevel = 0;
2620
2621 // Darwin doesn't use spaces to delmit arguments.
2622 AsmLexerSkipSpaceRAII ScopedSkipSpace(Lexer, IsDarwin);
2623
2624 bool SpaceEaten;
2625
2626 while (true) {
2627 SpaceEaten = false;
2628 if (Lexer.is(AsmToken::Eof) || Lexer.is(AsmToken::Equal))
2629 return TokError("unexpected token in macro instantiation");
2630
2631 if (ParenLevel == 0) {
2632
2633 if (Lexer.is(AsmToken::Comma))
2634 break;
2635
2636 if (Lexer.is(AsmToken::Space)) {
2637 SpaceEaten = true;
2638 Lexer.Lex(); // Eat spaces
2639 }
2640
2641 // Spaces can delimit parameters, but could also be part an expression.
2642 // If the token after a space is an operator, add the token and the next
2643 // one into this argument
2644 if (!IsDarwin) {
2645 if (isOperator(Lexer.getKind())) {
2646 MA.push_back(getTok());
2647 Lexer.Lex();
2648
2649 // Whitespace after an operator can be ignored.
2650 if (Lexer.is(AsmToken::Space))
2651 Lexer.Lex();
2652
2653 continue;
2654 }
2655 }
2656 if (SpaceEaten)
2657 break;
2658 }
2659
2660 // handleMacroEntry relies on not advancing the lexer here
2661 // to be able to fill in the remaining default parameter values
2662 if (Lexer.is(AsmToken::EndOfStatement))
2663 break;
2664
2665 // Adjust the current parentheses level.
2666 if (Lexer.is(AsmToken::LParen))
2667 ++ParenLevel;
2668 else if (Lexer.is(AsmToken::RParen) && ParenLevel)
2669 --ParenLevel;
2670
2671 // Append the token to the current argument list.
2672 MA.push_back(getTok());
2673 Lexer.Lex();
2674 }
2675
2676 if (ParenLevel != 0)
2677 return TokError("unbalanced parentheses in macro argument");
2678 return false;
2679}
2680
2681// Parse the macro instantiation arguments.
2682bool AsmParser::parseMacroArguments(const MCAsmMacro *M,
2683 MCAsmMacroArguments &A) {
2684 const unsigned NParameters = M ? M->Parameters.size() : 0;
2685 bool NamedParametersFound = false;
2686 SmallVector<SMLoc, 4> FALocs;
2687
2688 A.resize(NParameters);
2689 FALocs.resize(NParameters);
2690
2691 // Parse two kinds of macro invocations:
2692 // - macros defined without any parameters accept an arbitrary number of them
2693 // - macros defined with parameters accept at most that many of them
2694 bool HasVararg = NParameters ? M->Parameters.back().Vararg : false;
2695 for (unsigned Parameter = 0; !NParameters || Parameter < NParameters;
2696 ++Parameter) {
2697 SMLoc IDLoc = Lexer.getLoc();
2698 MCAsmMacroParameter FA;
2699
2700 if (Lexer.is(AsmToken::Identifier) && Lexer.peekTok().is(AsmToken::Equal)) {
2701 if (parseIdentifier(FA.Name))
2702 return Error(IDLoc, "invalid argument identifier for formal argument");
2703
2704 if (Lexer.isNot(AsmToken::Equal))
2705 return TokError("expected '=' after formal parameter identifier");
2706
2707 Lex();
2708
2709 NamedParametersFound = true;
2710 }
2711 bool Vararg = HasVararg && Parameter == (NParameters - 1);
2712
2713 if (NamedParametersFound && FA.Name.empty())
2714 return Error(IDLoc, "cannot mix positional and keyword arguments");
2715
2716 SMLoc StrLoc = Lexer.getLoc();
2717 SMLoc EndLoc;
2718 if (AltMacroMode && Lexer.is(AsmToken::Percent)) {
2719 const MCExpr *AbsoluteExp;
2720 int64_t Value;
2721 /// Eat '%'
2722 Lex();
2723 if (parseExpression(AbsoluteExp, EndLoc))
2724 return false;
2725 if (!AbsoluteExp->evaluateAsAbsolute(Value,
2726 getStreamer().getAssemblerPtr()))
2727 return Error(StrLoc, "expected absolute expression");
2728 const char *StrChar = StrLoc.getPointer();
2729 const char *EndChar = EndLoc.getPointer();
2730 AsmToken newToken(AsmToken::Integer,
2731 StringRef(StrChar, EndChar - StrChar), Value);
2732 FA.Value.push_back(newToken);
2733 } else if (AltMacroMode && Lexer.is(AsmToken::Less) &&
2734 isAngleBracketString(StrLoc, EndLoc)) {
2735 const char *StrChar = StrLoc.getPointer();
2736 const char *EndChar = EndLoc.getPointer();
2737 jumpToLoc(EndLoc, CurBuffer);
2738 /// Eat from '<' to '>'
2739 Lex();
2740 AsmToken newToken(AsmToken::String,
2741 StringRef(StrChar, EndChar - StrChar));
2742 FA.Value.push_back(newToken);
2743 } else if(parseMacroArgument(FA.Value, Vararg))
2744 return true;
2745
2746 unsigned PI = Parameter;
2747 if (!FA.Name.empty()) {
2748 unsigned FAI = 0;
2749 for (FAI = 0; FAI < NParameters; ++FAI)
2750 if (M->Parameters[FAI].Name == FA.Name)
2751 break;
2752
2753 if (FAI >= NParameters) {
2754 assert(M && "expected macro to be defined")((M && "expected macro to be defined") ? static_cast<
void> (0) : __assert_fail ("M && \"expected macro to be defined\""
, "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/llvm/lib/MC/MCParser/AsmParser.cpp"
, 2754, __PRETTY_FUNCTION__))
;
2755 return Error(IDLoc, "parameter named '" + FA.Name +
2756 "' does not exist for macro '" + M->Name + "'");
2757 }
2758 PI = FAI;
2759 }
2760
2761 if (!FA.Value.empty()) {
2762 if (A.size() <= PI)
2763 A.resize(PI + 1);
2764 A[PI] = FA.Value;
2765
2766 if (FALocs.size() <= PI)
2767 FALocs.resize(PI + 1);
2768
2769 FALocs[PI] = Lexer.getLoc();
2770 }
2771
2772 // At the end of the statement, fill in remaining arguments that have
2773 // default values. If there aren't any, then the next argument is
2774 // required but missing
2775 if (Lexer.is(AsmToken::EndOfStatement)) {
2776 bool Failure = false;
2777 for (unsigned FAI = 0; FAI < NParameters; ++FAI) {
2778 if (A[FAI].empty()) {
2779 if (M->Parameters[FAI].Required) {
2780 Error(FALocs[FAI].isValid() ? FALocs[FAI] : Lexer.getLoc(),
2781 "missing value for required parameter "
2782 "'" + M->Parameters[FAI].Name + "' in macro '" + M->Name + "'");
2783 Failure = true;
2784 }
2785
2786 if (!M->Parameters[FAI].Value.empty())
2787 A[FAI] = M->Parameters[FAI].Value;
2788 }
2789 }
2790 return Failure;
2791 }
2792
2793 if (Lexer.is(AsmToken::Comma))
2794 Lex();
2795 }
2796
2797 return TokError("too many positional arguments");
2798}
2799
2800bool AsmParser::handleMacroEntry(const MCAsmMacro *M, SMLoc NameLoc) {
2801 // Arbitrarily limit macro nesting depth (default matches 'as'). We can
2802 // eliminate this, although we should protect against infinite loops.
2803 unsigned MaxNestingDepth = AsmMacroMaxNestingDepth;
2804 if (ActiveMacros.size() == MaxNestingDepth) {
2805 std::ostringstream MaxNestingDepthError;
2806 MaxNestingDepthError << "macros cannot be nested more than "
2807 << MaxNestingDepth << " levels deep."
2808 << " Use -asm-macro-max-nesting-depth to increase "
2809 "this limit.";
2810 return TokError(MaxNestingDepthError.str());
2811 }
2812
2813 MCAsmMacroArguments A;
2814 if (parseMacroArguments(M, A))
2815 return true;
2816
2817 // Macro instantiation is lexical, unfortunately. We construct a new buffer
2818 // to hold the macro body with substitutions.
2819 SmallString<256> Buf;
2820 StringRef Body = M->Body;
2821 raw_svector_ostream OS(Buf);
2822
2823 if (expandMacro(OS, Body, M->Parameters, A, true, getTok().getLoc()))
2824 return true;
2825
2826 // We include the .endmacro in the buffer as our cue to exit the macro
2827 // instantiation.
2828 OS << ".endmacro\n";
2829
2830 std::unique_ptr<MemoryBuffer> Instantiation =
2831 MemoryBuffer::getMemBufferCopy(OS.str(), "<instantiation>");
2832
2833 // Create the macro instantiation object and add to the current macro
2834 // instantiation stack.
2835 MacroInstantiation *MI = new MacroInstantiation{
2836 NameLoc, CurBuffer, getTok().getLoc(), TheCondStack.size()};
2837 ActiveMacros.push_back(MI);
2838
2839 ++NumOfMacroInstantiations;
2840
2841 // Jump to the macro instantiation and prime the lexer.
2842 CurBuffer = SrcMgr.AddNewSourceBuffer(std::move(Instantiation), SMLoc());
2843 Lexer.setBuffer(SrcMgr.getMemoryBuffer(CurBuffer)->getBuffer());
2844 Lex();
2845
2846 return false;
2847}
2848
2849void AsmParser::handleMacroExit() {
2850 // Jump to the EndOfStatement we should return to, and consume it.
2851 jumpToLoc(ActiveMacros.back()->ExitLoc, ActiveMacros.back()->ExitBuffer);
2852 Lex();
2853
2854 // Pop the instantiation entry.
2855 delete ActiveMacros.back();
2856 ActiveMacros.pop_back();
2857}
2858
2859bool AsmParser::parseAssignment(StringRef Name, bool allow_redef,
2860 bool NoDeadStrip) {
2861 MCSymbol *Sym;
2862 const MCExpr *Value;
2863 if (MCParserUtils::parseAssignmentExpression(Name, allow_redef, *this, Sym,
2864 Value))
2865 return true;
2866
2867 if (!Sym) {
2868 // In the case where we parse an expression starting with a '.', we will
2869 // not generate an error, nor will we create a symbol. In this case we
2870 // should just return out.
2871 return false;
2872 }
2873
2874 if (discardLTOSymbol(Name))
2875 return false;
2876
2877 // Do the assignment.
2878 Out.emitAssignment(Sym, Value);
2879 if (NoDeadStrip)
2880 Out.emitSymbolAttribute(Sym, MCSA_NoDeadStrip);
2881
2882 return false;
2883}
2884
2885/// parseIdentifier:
2886/// ::= identifier
2887/// ::= string
2888bool AsmParser::parseIdentifier(StringRef &Res) {
2889 // The assembler has relaxed rules for accepting identifiers, in particular we
2890 // allow things like '.globl $foo' and '.def @feat.00', which would normally be
2891 // separate tokens. At this level, we have already lexed so we cannot (currently)
2892 // handle this as a context dependent token, instead we detect adjacent tokens
2893 // and return the combined identifier.
2894 if (Lexer.is(AsmToken::Dollar) || Lexer.is(AsmToken::At)) {
2895 SMLoc PrefixLoc = getLexer().getLoc();
2896
2897 // Consume the prefix character, and check for a following identifier.
2898
2899 AsmToken Buf[1];
2900 Lexer.peekTokens(Buf, false);
2901
2902 if (Buf[0].isNot(AsmToken::Identifier) && Buf[0].isNot(AsmToken::Integer))
2903 return true;
2904
2905 // We have a '$' or '@' followed by an identifier or integer token, make
2906 // sure they are adjacent.
2907 if (PrefixLoc.getPointer() + 1 != Buf[0].getLoc().getPointer())
2908 return true;
2909
2910 // eat $ or @
2911 Lexer.Lex(); // Lexer's Lex guarantees consecutive token.
2912 // Construct the joined identifier and consume the token.
2913 Res = StringRef(PrefixLoc.getPointer(), getTok().getString().size() + 1);
2914 Lex(); // Parser Lex to maintain invariants.
2915 return false;
2916 }
2917
2918 if (Lexer.isNot(AsmToken::Identifier) && Lexer.isNot(AsmToken::String))
2919 return true;
2920
2921 Res = getTok().getIdentifier();
2922
2923 Lex(); // Consume the identifier token.
2924
2925 return false;
2926}
2927
2928/// parseDirectiveSet:
2929/// ::= .equ identifier ',' expression
2930/// ::= .equiv identifier ',' expression
2931/// ::= .set identifier ',' expression
2932bool AsmParser::parseDirectiveSet(StringRef IDVal, bool allow_redef) {
2933 StringRef Name;
2934 if (check(parseIdentifier(Name), "expected identifier") ||
2935 parseToken(AsmToken::Comma) || parseAssignment(Name, allow_redef, true))
2936 return addErrorSuffix(" in '" + Twine(IDVal) + "' directive");
2937 return false;
2938}
2939
2940bool AsmParser::parseEscapedString(std::string &Data) {
2941 if (check(getTok().isNot(AsmToken::String), "expected string"))
2942 return true;
2943
2944 Data = "";
2945 StringRef Str = getTok().getStringContents();
2946 for (unsigned i = 0, e = Str.size(); i != e; ++i) {
2947 if (Str[i] != '\\') {
2948 Data += Str[i];
2949 continue;
2950 }
2951
2952 // Recognize escaped characters. Note that this escape semantics currently
2953 // loosely follows Darwin 'as'.
2954 ++i;
2955 if (i == e)
2956 return TokError("unexpected backslash at end of string");
2957
2958 // Recognize hex sequences similarly to GNU 'as'.
2959 if (Str[i] == 'x' || Str[i] == 'X') {
2960 size_t length = Str.size();
2961 if (i + 1 >= length || !isHexDigit(Str[i + 1]))
2962 return TokError("invalid hexadecimal escape sequence");
2963
2964 // Consume hex characters. GNU 'as' reads all hexadecimal characters and
2965 // then truncates to the lower 16 bits. Seems reasonable.
2966 unsigned Value = 0;
2967 while (i + 1 < length && isHexDigit(Str[i + 1]))
2968 Value = Value * 16 + hexDigitValue(Str[++i]);
2969
2970 Data += (unsigned char)(Value & 0xFF);
2971 continue;
2972 }
2973
2974 // Recognize octal sequences.
2975 if ((unsigned)(Str[i] - '0') <= 7) {
2976 // Consume up to three octal characters.
2977 unsigned Value = Str[i] - '0';
2978
2979 if (i + 1 != e && ((unsigned)(Str[i + 1] - '0')) <= 7) {
2980 ++i;
2981 Value = Value * 8 + (Str[i] - '0');
2982
2983 if (i + 1 != e && ((unsigned)(Str[i + 1] - '0')) <= 7) {
2984 ++i;
2985 Value = Value * 8 + (Str[i] - '0');
2986 }
2987 }
2988
2989 if (Value > 255)
2990 return TokError("invalid octal escape sequence (out of range)");
2991
2992 Data += (unsigned char)Value;
2993 continue;
2994 }
2995
2996 // Otherwise recognize individual escapes.
2997 switch (Str[i]) {
2998 default:
2999 // Just reject invalid escape sequences for now.
3000 return TokError("invalid escape sequence (unrecognized character)");
3001
3002 case 'b': Data += '\b'; break;
3003 case 'f': Data += '\f'; break;
3004 case 'n': Data += '\n'; break;
3005 case 'r': Data += '\r'; break;
3006 case 't': Data += '\t'; break;
3007 case '"': Data += '"'; break;
3008 case '\\': Data += '\\'; break;
3009 }
3010 }
3011
3012 Lex();
3013 return false;
3014}
3015
3016bool AsmParser::parseAngleBracketString(std::string &Data) {
3017 SMLoc EndLoc, StartLoc = getTok().getLoc();
3018 if (isAngleBracketString(StartLoc, EndLoc)) {
3019 const char *StartChar = StartLoc.getPointer() + 1;
3020 const char *EndChar = EndLoc.getPointer() - 1;
3021 jumpToLoc(EndLoc, CurBuffer);
3022 /// Eat from '<' to '>'
3023 Lex();
3024
3025 Data = angleBracketString(StringRef(StartChar, EndChar - StartChar));
3026 return false;
3027 }
3028 return true;
3029}
3030
3031/// parseDirectiveAscii:
3032// ::= .ascii [ "string"+ ( , "string"+ )* ]
3033/// ::= ( .asciz | .string ) [ "string" ( , "string" )* ]
3034bool AsmParser::parseDirectiveAscii(StringRef IDVal, bool ZeroTerminated) {
3035 auto parseOp = [&]() -> bool {
3036 std::string Data;
3037 if (checkForValidSection())
3038 return true;
3039 // Only support spaces as separators for .ascii directive for now. See the
3040 // discusssion at https://reviews.llvm.org/D91460 for more details.
3041 do {
3042 if (parseEscapedString(Data))
3043 return true;
3044 getStreamer().emitBytes(Data);
3045 } while (!ZeroTerminated && getTok().is(AsmToken::String));
3046 if (ZeroTerminated)
3047 getStreamer().emitBytes(StringRef("\0", 1));
3048 return false;
3049 };
3050
3051 if (parseMany(parseOp))
3052 return addErrorSuffix(" in '" + Twine(IDVal) + "' directive");
3053 return false;
3054}
3055
3056/// parseDirectiveReloc
3057/// ::= .reloc expression , identifier [ , expression ]
3058bool AsmParser::parseDirectiveReloc(SMLoc DirectiveLoc) {
3059 const MCExpr *Offset;
3060 const MCExpr *Expr = nullptr;
3061 SMLoc OffsetLoc = Lexer.getTok().getLoc();
3062
3063 if (parseExpression(Offset))
3064 return true;
3065 if (parseToken(AsmToken::Comma, "expected comma") ||
3066 check(getTok().isNot(AsmToken::Identifier), "expected relocation name"))
3067 return true;
3068
3069 SMLoc NameLoc = Lexer.getTok().getLoc();
3070 StringRef Name = Lexer.getTok().getIdentifier();
3071 Lex();
3072
3073 if (Lexer.is(AsmToken::Comma)) {
3074 Lex();
3075 SMLoc ExprLoc = Lexer.getLoc();
3076 if (parseExpression(Expr))
3077 return true;
3078
3079 MCValue Value;
3080 if (!Expr->evaluateAsRelocatable(Value, nullptr, nullptr))
3081 return Error(ExprLoc, "expression must be relocatable");
3082 }
3083
3084 if (parseEOL())
3085 return true;
3086
3087 const MCTargetAsmParser &MCT = getTargetParser();
3088 const MCSubtargetInfo &STI = MCT.getSTI();
3089 if (Optional<std::pair<bool, std::string>> Err =
3090 getStreamer().emitRelocDirective(*Offset, Name, Expr, DirectiveLoc,
3091 STI))
3092 return Error(Err->first ? NameLoc : OffsetLoc, Err->second);
3093
3094 return false;
3095}
3096
3097/// parseDirectiveValue
3098/// ::= (.byte | .short | ... ) [ expression (, expression)* ]
3099bool AsmParser::parseDirectiveValue(StringRef IDVal, unsigned Size) {
3100 auto parseOp = [&]() -> bool {
3101 const MCExpr *Value;
3102 SMLoc ExprLoc = getLexer().getLoc();
3103 if (checkForValidSection() || parseExpression(Value))
3104 return true;
3105 // Special case constant expressions to match code generator.
3106 if (const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Value)) {
3107 assert(Size <= 8 && "Invalid size")((Size <= 8 && "Invalid size") ? static_cast<void
> (0) : __assert_fail ("Size <= 8 && \"Invalid size\""
, "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/llvm/lib/MC/MCParser/AsmParser.cpp"
, 3107, __PRETTY_FUNCTION__))
;
3108 uint64_t IntValue = MCE->getValue();
3109 if (!isUIntN(8 * Size, IntValue) && !isIntN(8 * Size, IntValue))
3110 return Error(ExprLoc, "out of range literal value");
3111 getStreamer().emitIntValue(IntValue, Size);
3112 } else
3113 getStreamer().emitValue(Value, Size, ExprLoc);
3114 return false;
3115 };
3116
3117 if (parseMany(parseOp))
3118 return addErrorSuffix(" in '" + Twine(IDVal) + "' directive");
3119 return false;
3120}
3121
3122static bool parseHexOcta(AsmParser &Asm, uint64_t &hi, uint64_t &lo) {
3123 if (Asm.getTok().isNot(AsmToken::Integer) &&
3124 Asm.getTok().isNot(AsmToken::BigNum))
3125 return Asm.TokError("unknown token in expression");
3126 SMLoc ExprLoc = Asm.getTok().getLoc();
3127 APInt IntValue = Asm.getTok().getAPIntVal();
3128 Asm.Lex();
3129 if (!IntValue.isIntN(128))
3130 return Asm.Error(ExprLoc, "out of range literal value");
3131 if (!IntValue.isIntN(64)) {
3132 hi = IntValue.getHiBits(IntValue.getBitWidth() - 64).getZExtValue();
3133 lo = IntValue.getLoBits(64).getZExtValue();
3134 } else {
3135 hi = 0;
3136 lo = IntValue.getZExtValue();
3137 }
3138 return false;
3139}
3140
3141/// ParseDirectiveOctaValue
3142/// ::= .octa [ hexconstant (, hexconstant)* ]
3143
3144bool AsmParser::parseDirectiveOctaValue(StringRef IDVal) {
3145 auto parseOp = [&]() -> bool {
3146 if (checkForValidSection())
3147 return true;
3148 uint64_t hi, lo;
3149 if (parseHexOcta(*this, hi, lo))
3150 return true;
3151 if (MAI.isLittleEndian()) {
3152 getStreamer().emitInt64(lo);
3153 getStreamer().emitInt64(hi);
3154 } else {
3155 getStreamer().emitInt64(hi);
3156 getStreamer().emitInt64(lo);
3157 }
3158 return false;
3159 };
3160
3161 if (parseMany(parseOp))
3162 return addErrorSuffix(" in '" + Twine(IDVal) + "' directive");
3163 return false;
3164}
3165
3166bool AsmParser::parseRealValue(const fltSemantics &Semantics, APInt &Res) {
3167 // We don't truly support arithmetic on floating point expressions, so we
3168 // have to manually parse unary prefixes.
3169 bool IsNeg = false;
3170 if (getLexer().is(AsmToken::Minus)) {
3171 Lexer.Lex();
3172 IsNeg = true;
3173 } else if (getLexer().is(AsmToken::Plus))
3174 Lexer.Lex();
3175
3176 if (Lexer.is(AsmToken::Error))
3177 return TokError(Lexer.getErr());
3178 if (Lexer.isNot(AsmToken::Integer) && Lexer.isNot(AsmToken::Real) &&
3179 Lexer.isNot(AsmToken::Identifier))
3180 return TokError("unexpected token in directive");
3181
3182 // Convert to an APFloat.
3183 APFloat Value(Semantics);
3184 StringRef IDVal = getTok().getString();
3185 if (getLexer().is(AsmToken::Identifier)) {
3186 if (!IDVal.compare_lower("infinity") || !IDVal.compare_lower("inf"))
3187 Value = APFloat::getInf(Semantics);
3188 else if (!IDVal.compare_lower("nan"))
3189 Value = APFloat::getNaN(Semantics, false, ~0);
3190 else
3191 return TokError("invalid floating point literal");
3192 } else if (errorToBool(
3193 Value.convertFromString(IDVal, APFloat::rmNearestTiesToEven)
3194 .takeError()))
3195 return TokError("invalid floating point literal");
3196 if (IsNeg)
3197 Value.changeSign();
3198
3199 // Consume the numeric token.
3200 Lex();
3201
3202 Res = Value.bitcastToAPInt();
3203
3204 return false;
3205}
3206
3207/// parseDirectiveRealValue
3208/// ::= (.single | .double) [ expression (, expression)* ]
3209bool AsmParser::parseDirectiveRealValue(StringRef IDVal,
3210 const fltSemantics &Semantics) {
3211 auto parseOp = [&]() -> bool {
3212 APInt AsInt;
3213 if (checkForValidSection() || parseRealValue(Semantics, AsInt))
3214 return true;
3215 getStreamer().emitIntValue(AsInt.getLimitedValue(),
3216 AsInt.getBitWidth() / 8);
3217 return false;
3218 };
3219
3220 if (parseMany(parseOp))
3221 return addErrorSuffix(" in '" + Twine(IDVal) + "' directive");
3222 return false;
3223}
3224
3225/// parseDirectiveZero
3226/// ::= .zero expression
3227bool AsmParser::parseDirectiveZero() {
3228 SMLoc NumBytesLoc = Lexer.getLoc();
3229 const MCExpr *NumBytes;
3230 if (checkForValidSection() || parseExpression(NumBytes))
3231 return true;
3232
3233 int64_t Val = 0;
3234 if (getLexer().is(AsmToken::Comma)) {
3235 Lex();
3236 if (parseAbsoluteExpression(Val))
3237 return true;
3238 }
3239
3240 if (parseEOL())
3241 return true;
3242 getStreamer().emitFill(*NumBytes, Val, NumBytesLoc);
3243
3244 return false;
3245}
3246
3247/// parseDirectiveFill
3248/// ::= .fill expression [ , expression [ , expression ] ]
3249bool AsmParser::parseDirectiveFill() {
3250 SMLoc NumValuesLoc = Lexer.getLoc();
3251 const MCExpr *NumValues;
3252 if (checkForValidSection() || parseExpression(NumValues))
3253 return true;
3254
3255 int64_t FillSize = 1;
3256 int64_t FillExpr = 0;
3257
3258 SMLoc SizeLoc, ExprLoc;
3259
3260 if (parseOptionalToken(AsmToken::Comma)) {
3261 SizeLoc = getTok().getLoc();
3262 if (parseAbsoluteExpression(FillSize))
3263 return true;
3264 if (parseOptionalToken(AsmToken::Comma)) {
3265 ExprLoc = getTok().getLoc();
3266 if (parseAbsoluteExpression(FillExpr))
3267 return true;
3268 }
3269 }
3270 if (parseEOL())
3271 return true;
3272
3273 if (FillSize < 0) {
3274 Warning(SizeLoc, "'.fill' directive with negative size has no effect");
3275 return false;
3276 }
3277 if (FillSize > 8) {
3278 Warning(SizeLoc, "'.fill' directive with size greater than 8 has been truncated to 8");
3279 FillSize = 8;
3280 }
3281
3282 if (!isUInt<32>(FillExpr) && FillSize > 4)
3283 Warning(ExprLoc, "'.fill' directive pattern has been truncated to 32-bits");
3284
3285 getStreamer().emitFill(*NumValues, FillSize, FillExpr, NumValuesLoc);
3286
3287 return false;
3288}
3289
3290/// parseDirectiveOrg
3291/// ::= .org expression [ , expression ]
3292bool AsmParser::parseDirectiveOrg() {
3293 const MCExpr *Offset;
3294 SMLoc OffsetLoc = Lexer.getLoc();
3295 if (checkForValidSection() || parseExpression(Offset))
3296 return true;
3297
3298 // Parse optional fill expression.
3299 int64_t FillExpr = 0;
3300 if (parseOptionalToken(AsmToken::Comma))
3301 if (parseAbsoluteExpression(FillExpr))
3302 return addErrorSuffix(" in '.org' directive");
3303 if (parseEOL())
3304 return addErrorSuffix(" in '.org' directive");
3305
3306 getStreamer().emitValueToOffset(Offset, FillExpr, OffsetLoc);
3307 return false;
3308}
3309
3310/// parseDirectiveAlign
3311/// ::= {.align, ...} expression [ , expression [ , expression ]]
3312bool AsmParser::parseDirectiveAlign(bool IsPow2, unsigned ValueSize) {
3313 SMLoc AlignmentLoc = getLexer().getLoc();
3314 int64_t Alignment;
3315 SMLoc MaxBytesLoc;
3316 bool HasFillExpr = false;
3317 int64_t FillExpr = 0;
3318 int64_t MaxBytesToFill = 0;
3319
3320 auto parseAlign = [&]() -> bool {
3321 if (parseAbsoluteExpression(Alignment))
3322 return true;
3323 if (parseOptionalToken(AsmToken::Comma)) {
3324 // The fill expression can be omitted while specifying a maximum number of
3325 // alignment bytes, e.g:
3326 // .align 3,,4
3327 if (getTok().isNot(AsmToken::Comma)) {
3328 HasFillExpr = true;
3329 if (parseAbsoluteExpression(FillExpr))
3330 return true;
3331 }
3332 if (parseOptionalToken(AsmToken::Comma))
3333 if (parseTokenLoc(MaxBytesLoc) ||
3334 parseAbsoluteExpression(MaxBytesToFill))
3335 return true;
3336 }
3337 return parseEOL();
3338 };
3339
3340 if (checkForValidSection())
3341 return addErrorSuffix(" in directive");
3342 // Ignore empty '.p2align' directives for GNU-as compatibility
3343 if (IsPow2 && (ValueSize == 1) && getTok().is(AsmToken::EndOfStatement)) {
3344 Warning(AlignmentLoc, "p2align directive with no operand(s) is ignored");
3345 return parseEOL();
3346 }
3347 if (parseAlign())
3348 return addErrorSuffix(" in directive");
3349
3350 // Always emit an alignment here even if we thrown an error.
3351 bool ReturnVal = false;
3352
3353 // Compute alignment in bytes.
3354 if (IsPow2) {
3355 // FIXME: Diagnose overflow.
3356 if (Alignment >= 32) {
3357 ReturnVal |= Error(AlignmentLoc, "invalid alignment value");
3358 Alignment = 31;
3359 }
3360
3361 Alignment = 1ULL << Alignment;
3362 } else {
3363 // Reject alignments that aren't either a power of two or zero,
3364 // for gas compatibility. Alignment of zero is silently rounded
3365 // up to one.
3366 if (Alignment == 0)
3367 Alignment = 1;
3368 if (!isPowerOf2_64(Alignment))
3369 ReturnVal |= Error(AlignmentLoc, "alignment must be a power of 2");
3370 if (!isUInt<32>(Alignment))
3371 ReturnVal |= Error(AlignmentLoc, "alignment must be smaller than 2**32");
3372 }
3373
3374 // Diagnose non-sensical max bytes to align.
3375 if (MaxBytesLoc.isValid()) {
3376 if (MaxBytesToFill < 1) {
3377 ReturnVal |= Error(MaxBytesLoc,
3378 "alignment directive can never be satisfied in this "
3379 "many bytes, ignoring maximum bytes expression");
3380 MaxBytesToFill = 0;
3381 }
3382
3383 if (MaxBytesToFill >= Alignment) {
3384 Warning(MaxBytesLoc, "maximum bytes expression exceeds alignment and "
3385 "has no effect");
3386 MaxBytesToFill = 0;
3387 }
3388 }
3389
3390 // Check whether we should use optimal code alignment for this .align
3391 // directive.
3392 const MCSection *Section = getStreamer().getCurrentSectionOnly();
3393 assert(Section && "must have section to emit alignment")((Section && "must have section to emit alignment") ?
static_cast<void> (0) : __assert_fail ("Section && \"must have section to emit alignment\""
, "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/llvm/lib/MC/MCParser/AsmParser.cpp"
, 3393, __PRETTY_FUNCTION__))
;
3394 bool UseCodeAlign = Section->UseCodeAlign();
3395 if ((!HasFillExpr || Lexer.getMAI().getTextAlignFillValue() == FillExpr) &&
3396 ValueSize == 1 && UseCodeAlign) {
3397 getStreamer().emitCodeAlignment(Alignment, MaxBytesToFill);
3398 } else {
3399 // FIXME: Target specific behavior about how the "extra" bytes are filled.
3400 getStreamer().emitValueToAlignment(Alignment, FillExpr, ValueSize,
3401 MaxBytesToFill);
3402 }
3403
3404 return ReturnVal;
3405}
3406
3407/// parseDirectiveFile
3408/// ::= .file filename
3409/// ::= .file number [directory] filename [md5 checksum] [source source-text]
3410bool AsmParser::parseDirectiveFile(SMLoc DirectiveLoc) {
3411 // FIXME: I'm not sure what this is.
3412 int64_t FileNumber = -1;
3413 if (getLexer().is(AsmToken::Integer)) {
3414 FileNumber = getTok().getIntVal();
3415 Lex();
3416
3417 if (FileNumber < 0)
3418 return TokError("negative file number");
3419 }
3420
3421 std::string Path;
3422
3423 // Usually the directory and filename together, otherwise just the directory.
3424 // Allow the strings to have escaped octal character sequence.
3425 if (check(getTok().isNot(AsmToken::String),
3426 "unexpected token in '.file' directive") ||
3427 parseEscapedString(Path))
3428 return true;
3429
3430 StringRef Directory;
3431 StringRef Filename;
3432 std::string FilenameData;
3433 if (getLexer().is(AsmToken::String)) {
3434 if (check(FileNumber == -1,
3435 "explicit path specified, but no file number") ||
3436 parseEscapedString(FilenameData))
3437 return true;
3438 Filename = FilenameData;
3439 Directory = Path;
3440 } else {
3441 Filename = Path;
3442 }
3443
3444 uint64_t MD5Hi, MD5Lo;
3445 bool HasMD5 = false;
3446
3447 Optional<StringRef> Source;
3448 bool HasSource = false;
3449 std::string SourceString;
3450
3451 while (!parseOptionalToken(AsmToken::EndOfStatement)) {
3452 StringRef Keyword;
3453 if (check(getTok().isNot(AsmToken::Identifier),
3454 "unexpected token in '.file' directive") ||
3455 parseIdentifier(Keyword))
3456 return true;
3457 if (Keyword == "md5") {
3458 HasMD5 = true;
3459 if (check(FileNumber == -1,
3460 "MD5 checksum specified, but no file number") ||
3461 parseHexOcta(*this, MD5Hi, MD5Lo))
3462 return true;
3463 } else if (Keyword == "source") {
3464 HasSource = true;
3465 if (check(FileNumber == -1,
3466 "source specified, but no file number") ||
3467 check(getTok().isNot(AsmToken::String),
3468 "unexpected token in '.file' directive") ||
3469 parseEscapedString(SourceString))
3470 return true;
3471 } else {
3472 return TokError("unexpected token in '.file' directive");
3473 }
3474 }
3475
3476 if (FileNumber == -1) {
3477 // Ignore the directive if there is no number and the target doesn't support
3478 // numberless .file directives. This allows some portability of assembler
3479 // between different object file formats.
3480 if (getContext().getAsmInfo()->hasSingleParameterDotFile())
3481 getStreamer().emitFileDirective(Filename);
3482 } else {
3483 // In case there is a -g option as well as debug info from directive .file,
3484 // we turn off the -g option, directly use the existing debug info instead.
3485 // Throw away any implicit file table for the assembler source.
3486 if (Ctx.getGenDwarfForAssembly()) {
3487 Ctx.getMCDwarfLineTable(0).resetFileTable();
3488 Ctx.setGenDwarfForAssembly(false);
3489 }
3490
3491 Optional<MD5::MD5Result> CKMem;
3492 if (HasMD5) {
3493 MD5::MD5Result Sum;
3494 for (unsigned i = 0; i != 8; ++i) {
3495 Sum.Bytes[i] = uint8_t(MD5Hi >> ((7 - i) * 8));
3496 Sum.Bytes[i + 8] = uint8_t(MD5Lo >> ((7 - i) * 8));
3497 }
3498 CKMem = Sum;
3499 }
3500 if (HasSource) {
3501 char *SourceBuf = static_cast<char *>(Ctx.allocate(SourceString.size()));
3502 memcpy(SourceBuf, SourceString.data(), SourceString.size());
3503 Source = StringRef(SourceBuf, SourceString.size());
3504 }
3505 if (FileNumber == 0) {
3506 // Upgrade to Version 5 for assembly actions like clang -c a.s.
3507 if (Ctx.getDwarfVersion() < 5)
3508 Ctx.setDwarfVersion(5);
3509 getStreamer().emitDwarfFile0Directive(Directory, Filename, CKMem, Source);
3510 } else {
3511 Expected<unsigned> FileNumOrErr = getStreamer().tryEmitDwarfFileDirective(
3512 FileNumber, Directory, Filename, CKMem, Source);
3513 if (!FileNumOrErr)
3514 return Error(DirectiveLoc, toString(FileNumOrErr.takeError()));
3515 }
3516 // Alert the user if there are some .file directives with MD5 and some not.
3517 // But only do that once.
3518 if (!ReportedInconsistentMD5 && !Ctx.isDwarfMD5UsageConsistent(0)) {
3519 ReportedInconsistentMD5 = true;
3520 return Warning(DirectiveLoc, "inconsistent use of MD5 checksums");
3521 }
3522 }
3523
3524 return false;
3525}
3526
3527/// parseDirectiveLine
3528/// ::= .line [number]
3529bool AsmParser::parseDirectiveLine() {
3530 int64_t LineNumber;
3531 if (getLexer().is(AsmToken::Integer)) {
3532 if (parseIntToken(LineNumber, "unexpected token in '.line' directive"))
3533 return true;
3534 (void)LineNumber;
3535 // FIXME: Do something with the .line.
3536 }
3537 return parseEOL();
3538}
3539
3540/// parseDirectiveLoc
3541/// ::= .loc FileNumber [LineNumber] [ColumnPos] [basic_block] [prologue_end]
3542/// [epilogue_begin] [is_stmt VALUE] [isa VALUE]
3543/// The first number is a file number, must have been previously assigned with
3544/// a .file directive, the second number is the line number and optionally the
3545/// third number is a column position (zero if not specified). The remaining
3546/// optional items are .loc sub-directives.
3547bool AsmParser::parseDirectiveLoc() {
3548 int64_t FileNumber = 0, LineNumber = 0;
3549 SMLoc Loc = getTok().getLoc();
3550 if (parseIntToken(FileNumber, "unexpected token in '.loc' directive") ||
3551 check(FileNumber < 1 && Ctx.getDwarfVersion() < 5, Loc,
3552 "file number less than one in '.loc' directive") ||
3553 check(!getContext().isValidDwarfFileNumber(FileNumber), Loc,
3554 "unassigned file number in '.loc' directive"))
3555 return true;
3556
3557 // optional
3558 if (getLexer().is(AsmToken::Integer)) {
3559 LineNumber = getTok().getIntVal();
3560 if (LineNumber < 0)
3561 return TokError("line number less than zero in '.loc' directive");
3562 Lex();
3563 }
3564
3565 int64_t ColumnPos = 0;
3566 if (getLexer().is(AsmToken::Integer)) {
3567 ColumnPos = getTok().getIntVal();
3568 if (ColumnPos < 0)
3569 return TokError("column position less than zero in '.loc' directive");
3570 Lex();
3571 }
3572
3573 auto PrevFlags = getContext().getCurrentDwarfLoc().getFlags();
3574 unsigned Flags = PrevFlags & DWARF2_FLAG_IS_STMT(1 << 0);
3575 unsigned Isa = 0;
3576 int64_t Discriminator = 0;
3577
3578 auto parseLocOp = [&]() -> bool {
3579 StringRef Name;
3580 SMLoc Loc = getTok().getLoc();
3581 if (parseIdentifier(Name))
3582 return TokError("unexpected token in '.loc' directive");
3583
3584 if (Name == "basic_block")
3585 Flags |= DWARF2_FLAG_BASIC_BLOCK(1 << 1);
3586 else if (Name == "prologue_end")
3587 Flags |= DWARF2_FLAG_PROLOGUE_END(1 << 2);
3588 else if (Name == "epilogue_begin")
3589 Flags |= DWARF2_FLAG_EPILOGUE_BEGIN(1 << 3);
3590 else if (Name == "is_stmt") {
3591 Loc = getTok().getLoc();
3592 const MCExpr *Value;
3593 if (parseExpression(Value))
3594 return true;
3595 // The expression must be the constant 0 or 1.
3596 if (const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Value)) {
3597 int Value = MCE->getValue();
3598 if (Value == 0)
3599 Flags &= ~DWARF2_FLAG_IS_STMT(1 << 0);
3600 else if (Value == 1)
3601 Flags |= DWARF2_FLAG_IS_STMT(1 << 0);
3602 else
3603 return Error(Loc, "is_stmt value not 0 or 1");
3604 } else {
3605 return Error(Loc, "is_stmt value not the constant value of 0 or 1");
3606 }
3607 } else if (Name == "isa") {
3608 Loc = getTok().getLoc();
3609 const MCExpr *Value;
3610 if (parseExpression(Value))
3611 return true;
3612 // The expression must be a constant greater or equal to 0.
3613 if (const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Value)) {
3614 int Value = MCE->getValue();
3615 if (Value < 0)
3616 return Error(Loc, "isa number less than zero");
3617 Isa = Value;
3618 } else {
3619 return Error(Loc, "isa number not a constant value");
3620 }
3621 } else if (Name == "discriminator") {
3622 if (parseAbsoluteExpression(Discriminator))
3623 return true;
3624 } else {
3625 return Error(Loc, "unknown sub-directive in '.loc' directive");
3626 }
3627 return false;
3628 };
3629
3630 if (parseMany(parseLocOp, false /*hasComma*/))
3631 return true;
3632
3633 getStreamer().emitDwarfLocDirective(FileNumber, LineNumber, ColumnPos, Flags,
3634 Isa, Discriminator, StringRef());
3635
3636 return false;
3637}
3638
3639/// parseDirectiveStabs
3640/// ::= .stabs string, number, number, number
3641bool AsmParser::parseDirectiveStabs() {
3642 return TokError("unsupported directive '.stabs'");
3643}
3644
3645/// parseDirectiveCVFile
3646/// ::= .cv_file number filename [checksum] [checksumkind]
3647bool AsmParser::parseDirectiveCVFile() {
3648 SMLoc FileNumberLoc = getTok().getLoc();
3649 int64_t FileNumber;
3650 std::string Filename;
3651 std::string Checksum;
3652 int64_t ChecksumKind = 0;
3653
3654 if (parseIntToken(FileNumber,
3655 "expected file number in '.cv_file' directive") ||
3656 check(FileNumber < 1, FileNumberLoc, "file number less than one") ||
3657 check(getTok().isNot(AsmToken::String),
3658 "unexpected token in '.cv_file' directive") ||
3659 parseEscapedString(Filename))
3660 return true;
3661 if (!parseOptionalToken(AsmToken::EndOfStatement)) {
3662 if (check(getTok().isNot(AsmToken::String),
3663 "unexpected token in '.cv_file' directive") ||
3664 parseEscapedString(Checksum) ||
3665 parseIntToken(ChecksumKind,
3666 "expected checksum kind in '.cv_file' directive") ||
3667 parseToken(AsmToken::EndOfStatement,
3668 "unexpected token in '.cv_file' directive"))
3669 return true;
3670 }
3671
3672 Checksum = fromHex(Checksum);
3673 void *CKMem = Ctx.allocate(Checksum.size(), 1);
3674 memcpy(CKMem, Checksum.data(), Checksum.size());
3675 ArrayRef<uint8_t> ChecksumAsBytes(reinterpret_cast<const uint8_t *>(CKMem),
3676 Checksum.size());
3677
3678 if (!getStreamer().EmitCVFileDirective(FileNumber, Filename, ChecksumAsBytes,
3679 static_cast<uint8_t>(ChecksumKind)))
3680 return Error(FileNumberLoc, "file number already allocated");
3681
3682 return false;
3683}
3684
3685bool AsmParser::parseCVFunctionId(int64_t &FunctionId,
3686 StringRef DirectiveName) {
3687 SMLoc Loc;
3688 return parseTokenLoc(Loc) ||
3689 parseIntToken(FunctionId, "expected function id in '" + DirectiveName +
3690 "' directive") ||
3691 check(FunctionId < 0 || FunctionId >= UINT_MAX(2147483647 *2U +1U), Loc,
3692 "expected function id within range [0, UINT_MAX)");
3693}
3694
3695bool AsmParser::parseCVFileId(int64_t &FileNumber, StringRef DirectiveName) {
3696 SMLoc Loc;
3697 return parseTokenLoc(Loc) ||
3698 parseIntToken(FileNumber, "expected integer in '" + DirectiveName +
3699 "' directive") ||
3700 check(FileNumber < 1, Loc, "file number less than one in '" +
3701 DirectiveName + "' directive") ||
3702 check(!getCVContext().isValidFileNumber(FileNumber), Loc,
3703 "unassigned file number in '" + DirectiveName + "' directive");
3704}
3705
3706/// parseDirectiveCVFuncId
3707/// ::= .cv_func_id FunctionId
3708///
3709/// Introduces a function ID that can be used with .cv_loc.
3710bool AsmParser::parseDirectiveCVFuncId() {
3711 SMLoc FunctionIdLoc = getTok().getLoc();
3712 int64_t FunctionId;
3713
3714 if (parseCVFunctionId(FunctionId, ".cv_func_id") ||
3715 parseToken(AsmToken::EndOfStatement,
3716 "unexpected token in '.cv_func_id' directive"))
3717 return true;
3718
3719 if (!getStreamer().EmitCVFuncIdDirective(FunctionId))
3720 return Error(FunctionIdLoc, "function id already allocated");
3721
3722 return false;
3723}
3724
3725/// parseDirectiveCVInlineSiteId
3726/// ::= .cv_inline_site_id FunctionId
3727/// "within" IAFunc
3728/// "inlined_at" IAFile IALine [IACol]
3729///
3730/// Introduces a function ID that can be used with .cv_loc. Includes "inlined
3731/// at" source location information for use in the line table of the caller,
3732/// whether the caller is a real function or another inlined call site.
3733bool AsmParser::parseDirectiveCVInlineSiteId() {
3734 SMLoc FunctionIdLoc = getTok().getLoc();
3735 int64_t FunctionId;
3736 int64_t IAFunc;
3737 int64_t IAFile;
3738 int64_t IALine;
3739 int64_t IACol = 0;
3740
3741 // FunctionId
3742 if (parseCVFunctionId(FunctionId, ".cv_inline_site_id"))
3743 return true;
3744
3745 // "within"
3746 if (check((getLexer().isNot(AsmToken::Identifier) ||
3747 getTok().getIdentifier() != "within"),
3748 "expected 'within' identifier in '.cv_inline_site_id' directive"))
3749 return true;
3750 Lex();
3751
3752 // IAFunc
3753 if (parseCVFunctionId(IAFunc, ".cv_inline_site_id"))
3754 return true;
3755
3756 // "inlined_at"
3757 if (check((getLexer().isNot(AsmToken::Identifier) ||
3758 getTok().getIdentifier() != "inlined_at"),
3759 "expected 'inlined_at' identifier in '.cv_inline_site_id' "
3760 "directive") )
3761 return true;
3762 Lex();
3763
3764 // IAFile IALine
3765 if (parseCVFileId(IAFile, ".cv_inline_site_id") ||
3766 parseIntToken(IALine, "expected line number after 'inlined_at'"))
3767 return true;
3768
3769 // [IACol]
3770 if (getLexer().is(AsmToken::Integer)) {
3771 IACol = getTok().getIntVal();
3772 Lex();
3773 }
3774
3775 if (parseToken(AsmToken::EndOfStatement,
3776 "unexpected token in '.cv_inline_site_id' directive"))
3777 return true;
3778
3779 if (!getStreamer().EmitCVInlineSiteIdDirective(FunctionId, IAFunc, IAFile,
3780 IALine, IACol, FunctionIdLoc))
3781 return Error(FunctionIdLoc, "function id already allocated");
3782
3783 return false;
3784}
3785
3786/// parseDirectiveCVLoc
3787/// ::= .cv_loc FunctionId FileNumber [LineNumber] [ColumnPos] [prologue_end]
3788/// [is_stmt VALUE]
3789/// The first number is a file number, must have been previously assigned with
3790/// a .file directive, the second number is the line number and optionally the
3791/// third number is a column position (zero if not specified). The remaining
3792/// optional items are .loc sub-directives.
3793bool AsmParser::parseDirectiveCVLoc() {
3794 SMLoc DirectiveLoc = getTok().getLoc();
3795 int64_t FunctionId, FileNumber;
3796 if (parseCVFunctionId(FunctionId, ".cv_loc") ||
3797 parseCVFileId(FileNumber, ".cv_loc"))
3798 return true;
3799
3800 int64_t LineNumber = 0;
3801 if (getLexer().is(AsmToken::Integer)) {
3802 LineNumber = getTok().getIntVal();
3803 if (LineNumber < 0)
3804 return TokError("line number less than zero in '.cv_loc' directive");
3805 Lex();
3806 }
3807
3808 int64_t ColumnPos = 0;
3809 if (getLexer().is(AsmToken::Integer)) {
3810 ColumnPos = getTok().getIntVal();
3811 if (ColumnPos < 0)
3812 return TokError("column position less than zero in '.cv_loc' directive");
3813 Lex();
3814 }
3815
3816 bool PrologueEnd = false;
3817 uint64_t IsStmt = 0;
3818
3819 auto parseOp = [&]() -> bool {
3820 StringRef Name;
3821 SMLoc Loc = getTok().getLoc();
3822 if (parseIdentifier(Name))
3823 return TokError("unexpected token in '.cv_loc' directive");
3824 if (Name == "prologue_end")
3825 PrologueEnd = true;
3826 else if (Name == "is_stmt") {
3827 Loc = getTok().getLoc();
3828 const MCExpr *Value;
3829 if (parseExpression(Value))
3830 return true;
3831 // The expression must be the constant 0 or 1.
3832 IsStmt = ~0ULL;
3833 if (const auto *MCE = dyn_cast<MCConstantExpr>(Value))
3834 IsStmt = MCE->getValue();
3835
3836 if (IsStmt > 1)
3837 return Error(Loc, "is_stmt value not 0 or 1");
3838 } else {
3839 return Error(Loc, "unknown sub-directive in '.cv_loc' directive");
3840 }
3841 return false;
3842 };
3843
3844 if (parseMany(parseOp, false /*hasComma*/))
3845 return true;
3846
3847 getStreamer().emitCVLocDirective(FunctionId, FileNumber, LineNumber,
3848 ColumnPos, PrologueEnd, IsStmt, StringRef(),
3849 DirectiveLoc);
3850 return false;
3851}
3852
3853/// parseDirectiveCVLinetable
3854/// ::= .cv_linetable FunctionId, FnStart, FnEnd
3855bool AsmParser::parseDirectiveCVLinetable() {
3856 int64_t FunctionId;
3857 StringRef FnStartName, FnEndName;
3858 SMLoc Loc = getTok().getLoc();
3859 if (parseCVFunctionId(FunctionId, ".cv_linetable") ||
3860 parseToken(AsmToken::Comma,
3861 "unexpected token in '.cv_linetable' directive") ||
3862 parseTokenLoc(Loc) || check(parseIdentifier(FnStartName), Loc,
3863 "expected identifier in directive") ||
3864 parseToken(AsmToken::Comma,
3865 "unexpected token in '.cv_linetable' directive") ||
3866 parseTokenLoc(Loc) || check(parseIdentifier(FnEndName), Loc,
3867 "expected identifier in directive"))
3868 return true;
3869
3870 MCSymbol *FnStartSym = getContext().getOrCreateSymbol(FnStartName);
3871 MCSymbol *FnEndSym = getContext().getOrCreateSymbol(FnEndName);
3872
3873 getStreamer().emitCVLinetableDirective(FunctionId, FnStartSym, FnEndSym);
3874 return false;
3875}
3876
3877/// parseDirectiveCVInlineLinetable
3878/// ::= .cv_inline_linetable PrimaryFunctionId FileId LineNum FnStart FnEnd
3879bool AsmParser::parseDirectiveCVInlineLinetable() {
3880 int64_t PrimaryFunctionId, SourceFileId, SourceLineNum;
3881 StringRef FnStartName, FnEndName;
3882 SMLoc Loc = getTok().getLoc();
3883 if (parseCVFunctionId(PrimaryFunctionId, ".cv_inline_linetable") ||
3884 parseTokenLoc(Loc) ||
3885 parseIntToken(
3886 SourceFileId,
3887 "expected SourceField in '.cv_inline_linetable' directive") ||
3888 check(SourceFileId <= 0, Loc,
3889 "File id less than zero in '.cv_inline_linetable' directive") ||
3890 parseTokenLoc(Loc) ||
3891 parseIntToken(
3892 SourceLineNum,
3893 "expected SourceLineNum in '.cv_inline_linetable' directive") ||
3894 check(SourceLineNum < 0, Loc,
3895 "Line number less than zero in '.cv_inline_linetable' directive") ||
3896 parseTokenLoc(Loc) || check(parseIdentifier(FnStartName), Loc,
3897 "expected identifier in directive") ||
3898 parseTokenLoc(Loc) || check(parseIdentifier(FnEndName), Loc,
3899 "expected identifier in directive"))
3900 return true;
3901
3902 if (parseToken(AsmToken::EndOfStatement, "Expected End of Statement"))
3903 return true;
3904
3905 MCSymbol *FnStartSym = getContext().getOrCreateSymbol(FnStartName);
3906 MCSymbol *FnEndSym = getContext().getOrCreateSymbol(FnEndName);
3907 getStreamer().emitCVInlineLinetableDirective(PrimaryFunctionId, SourceFileId,
3908 SourceLineNum, FnStartSym,
3909 FnEndSym);
3910 return false;
3911}
3912
3913void AsmParser::initializeCVDefRangeTypeMap() {
3914 CVDefRangeTypeMap["reg"] = CVDR_DEFRANGE_REGISTER;
3915 CVDefRangeTypeMap["frame_ptr_rel"] = CVDR_DEFRANGE_FRAMEPOINTER_REL;
3916 CVDefRangeTypeMap["subfield_reg"] = CVDR_DEFRANGE_SUBFIELD_REGISTER;
3917 CVDefRangeTypeMap["reg_rel"] = CVDR_DEFRANGE_REGISTER_REL;
3918}
3919
3920/// parseDirectiveCVDefRange
3921/// ::= .cv_def_range RangeStart RangeEnd (GapStart GapEnd)*, bytes*
3922bool AsmParser::parseDirectiveCVDefRange() {
3923 SMLoc Loc;
3924 std::vector<std::pair<const MCSymbol *, const MCSymbol *>> Ranges;
3925 while (getLexer().is(AsmToken::Identifier)) {
3926 Loc = getLexer().getLoc();
3927 StringRef GapStartName;
3928 if (parseIdentifier(GapStartName))
3929 return Error(Loc, "expected identifier in directive");
3930 MCSymbol *GapStartSym = getContext().getOrCreateSymbol(GapStartName);
3931
3932 Loc = getLexer().getLoc();
3933 StringRef GapEndName;
3934 if (parseIdentifier(GapEndName))
3935 return Error(Loc, "expected identifier in directive");
3936 MCSymbol *GapEndSym = getContext().getOrCreateSymbol(GapEndName);
3937
3938 Ranges.push_back({GapStartSym, GapEndSym});
3939 }
3940
3941 StringRef CVDefRangeTypeStr;
3942 if (parseToken(
3943 AsmToken::Comma,
3944 "expected comma before def_range type in .cv_def_range directive") ||
3945 parseIdentifier(CVDefRangeTypeStr))
3946 return Error(Loc, "expected def_range type in directive");
3947
3948 StringMap<CVDefRangeType>::const_iterator CVTypeIt =
3949 CVDefRangeTypeMap.find(CVDefRangeTypeStr);
3950 CVDefRangeType CVDRType = (CVTypeIt == CVDefRangeTypeMap.end())
3951 ? CVDR_DEFRANGE
3952 : CVTypeIt->getValue();
3953 switch (CVDRType) {
3954 case CVDR_DEFRANGE_REGISTER: {
3955 int64_t DRRegister;
3956 if (parseToken(AsmToken::Comma, "expected comma before register number in "
3957 ".cv_def_range directive") ||
3958 parseAbsoluteExpression(DRRegister))
3959 return Error(Loc, "expected register number");
3960
3961 codeview::DefRangeRegisterHeader DRHdr;
3962 DRHdr.Register = DRRegister;
3963 DRHdr.MayHaveNoName = 0;
3964 getStreamer().emitCVDefRangeDirective(Ranges, DRHdr);
3965 break;
3966 }
3967 case CVDR_DEFRANGE_FRAMEPOINTER_REL: {
3968 int64_t DROffset;
3969 if (parseToken(AsmToken::Comma,
3970 "expected comma before offset in .cv_def_range directive") ||
3971 parseAbsoluteExpression(DROffset))
3972 return Error(Loc, "expected offset value");
3973
3974 codeview::DefRangeFramePointerRelHeader DRHdr;
3975 DRHdr.Offset = DROffset;
3976 getStreamer().emitCVDefRangeDirective(Ranges, DRHdr);
3977 break;
3978 }
3979 case CVDR_DEFRANGE_SUBFIELD_REGISTER: {
3980 int64_t DRRegister;
3981 int64_t DROffsetInParent;
3982 if (parseToken(AsmToken::Comma, "expected comma before register number in "
3983 ".cv_def_range directive") ||
3984 parseAbsoluteExpression(DRRegister))
3985 return Error(Loc, "expected register number");
3986 if (parseToken(AsmToken::Comma,
3987 "expected comma before offset in .cv_def_range directive") ||
3988 parseAbsoluteExpression(DROffsetInParent))
3989 return Error(Loc, "expected offset value");
3990
3991 codeview::DefRangeSubfieldRegisterHeader DRHdr;
3992 DRHdr.Register = DRRegister;
3993 DRHdr.MayHaveNoName = 0;
3994 DRHdr.OffsetInParent = DROffsetInParent;
3995 getStreamer().emitCVDefRangeDirective(Ranges, DRHdr);
3996 break;
3997 }
3998 case CVDR_DEFRANGE_REGISTER_REL: {
3999 int64_t DRRegister;
4000 int64_t DRFlags;
4001 int64_t DRBasePointerOffset;
4002 if (parseToken(AsmToken::Comma, "expected comma before register number in "
4003 ".cv_def_range directive") ||
4004 parseAbsoluteExpression(DRRegister))
4005 return Error(Loc, "expected register value");
4006 if (parseToken(
4007 AsmToken::Comma,
4008 "expected comma before flag value in .cv_def_range directive") ||
4009 parseAbsoluteExpression(DRFlags))
4010 return Error(Loc, "expected flag value");
4011 if (parseToken(AsmToken::Comma, "expected comma before base pointer offset "
4012 "in .cv_def_range directive") ||
4013 parseAbsoluteExpression(DRBasePointerOffset))
4014 return Error(Loc, "expected base pointer offset value");
4015
4016 codeview::DefRangeRegisterRelHeader DRHdr;
4017 DRHdr.Register = DRRegister;
4018 DRHdr.Flags = DRFlags;
4019 DRHdr.BasePointerOffset = DRBasePointerOffset;
4020 getStreamer().emitCVDefRangeDirective(Ranges, DRHdr);
4021 break;
4022 }
4023 default:
4024 return Error(Loc, "unexpected def_range type in .cv_def_range directive");
4025 }
4026 return true;
4027}
4028
4029/// parseDirectiveCVString
4030/// ::= .cv_stringtable "string"
4031bool AsmParser::parseDirectiveCVString() {
4032 std::string Data;
4033 if (checkForValidSection() || parseEscapedString(Data))
4034 return addErrorSuffix(" in '.cv_string' directive");
4035
4036 // Put the string in the table and emit the offset.
4037 std::pair<StringRef, unsigned> Insertion =
4038 getCVContext().addToStringTable(Data);
4039 getStreamer().emitInt32(Insertion.second);
4040 return false;
4041}
4042
4043/// parseDirectiveCVStringTable
4044/// ::= .cv_stringtable
4045bool AsmParser::parseDirectiveCVStringTable() {
4046 getStreamer().emitCVStringTableDirective();
4047 return false;
4048}
4049
4050/// parseDirectiveCVFileChecksums
4051/// ::= .cv_filechecksums
4052bool AsmParser::parseDirectiveCVFileChecksums() {
4053 getStreamer().emitCVFileChecksumsDirective();
4054 return false;
4055}
4056
4057/// parseDirectiveCVFileChecksumOffset
4058/// ::= .cv_filechecksumoffset fileno
4059bool AsmParser::parseDirectiveCVFileChecksumOffset() {
4060 int64_t FileNo;
4061 if (parseIntToken(FileNo, "expected identifier in directive"))
4062 return true;
4063 if (parseToken(AsmToken::EndOfStatement, "Expected End of Statement"))
4064 return true;
4065 getStreamer().emitCVFileChecksumOffsetDirective(FileNo);
4066 return false;
4067}
4068
4069/// parseDirectiveCVFPOData
4070/// ::= .cv_fpo_data procsym
4071bool AsmParser::parseDirectiveCVFPOData() {
4072 SMLoc DirLoc = getLexer().getLoc();
4073 StringRef ProcName;
4074 if (parseIdentifier(ProcName))
4075 return TokError("expected symbol name");
4076 if (parseEOL("unexpected tokens"))
4077 return addErrorSuffix(" in '.cv_fpo_data' directive");
4078 MCSymbol *ProcSym = getContext().getOrCreateSymbol(ProcName);
4079 getStreamer().EmitCVFPOData(ProcSym, DirLoc);
4080 return false;
4081}
4082
4083/// parseDirectiveCFISections
4084/// ::= .cfi_sections section [, section]
4085bool AsmParser::parseDirectiveCFISections() {
4086 StringRef Name;
4087 bool EH = false;
4088 bool Debug = false;
4089
4090 if (!parseOptionalToken(AsmToken::EndOfStatement)) {
4091 for (;;) {
4092 if (parseIdentifier(Name))
4093 return TokError("expected .eh_frame or .debug_frame");
4094 if (Name == ".eh_frame")
4095 EH = true;
4096 else if (Name == ".debug_frame")
4097 Debug = true;
4098 if (parseOptionalToken(AsmToken::EndOfStatement))
4099 break;
4100 if (parseToken(AsmToken::Comma))
4101 return true;
4102 }
4103 }
4104 getStreamer().emitCFISections(EH, Debug);
4105 return false;
4106}
4107
4108/// parseDirectiveCFIStartProc
4109/// ::= .cfi_startproc [simple]
4110bool AsmParser::parseDirectiveCFIStartProc() {
4111 StringRef Simple;
4112 if (!parseOptionalToken(AsmToken::EndOfStatement)) {
4113 if (check(parseIdentifier(Simple) || Simple != "simple",
4114 "unexpected token") ||
4115 parseEOL())
4116 return addErrorSuffix(" in '.cfi_startproc' directive");
4117 }
4118
4119 // TODO(kristina): Deal with a corner case of incorrect diagnostic context
4120 // being produced if this directive is emitted as part of preprocessor macro
4121 // expansion which can *ONLY* happen if Clang's cc1as is the API consumer.
4122 // Tools like llvm-mc on the other hand are not affected by it, and report
4123 // correct context information.
4124 getStreamer().emitCFIStartProc(!Simple.empty(), Lexer.getLoc());
4125 return false;
4126}
4127
4128/// parseDirectiveCFIEndProc
4129/// ::= .cfi_endproc
4130bool AsmParser::parseDirectiveCFIEndProc() {
4131 if (parseEOL())
4132 return addErrorSuffix(" in '.cfi_endproc' directive");
4133 getStreamer().emitCFIEndProc();
4134 return false;
4135}
4136
4137/// parse register name or number.
4138bool AsmParser::parseRegisterOrRegisterNumber(int64_t &Register,
4139 SMLoc DirectiveLoc) {
4140 unsigned RegNo;
4141
4142 if (getLexer().isNot(AsmToken::Integer)) {
4143 if (getTargetParser().ParseRegister(RegNo, DirectiveLoc, DirectiveLoc))
4144 return true;
4145 Register = getContext().getRegisterInfo()->getDwarfRegNum(RegNo, true);
4146 } else
4147 return parseAbsoluteExpression(Register);
4148
4149 return false;
4150}
4151
4152/// parseDirectiveCFIDefCfa
4153/// ::= .cfi_def_cfa register, offset
4154bool AsmParser::parseDirectiveCFIDefCfa(SMLoc DirectiveLoc) {
4155 int64_t Register = 0, Offset = 0;
4156 if (parseRegisterOrRegisterNumber(Register, DirectiveLoc) ||
4157 parseToken(AsmToken::Comma, "unexpected token in directive") ||
4158 parseAbsoluteExpression(Offset) || parseEOL())
4159 return true;
4160
4161 getStreamer().emitCFIDefCfa(Register, Offset);
4162 return false;
4163}
4164
4165/// parseDirectiveCFIDefCfaOffset
4166/// ::= .cfi_def_cfa_offset offset
4167bool AsmParser::parseDirectiveCFIDefCfaOffset() {
4168 int64_t Offset = 0;
4169 if (parseAbsoluteExpression(Offset) || parseEOL())
4170 return true;
4171
4172 getStreamer().emitCFIDefCfaOffset(Offset);
4173 return false;
4174}
4175
4176/// parseDirectiveCFIRegister
4177/// ::= .cfi_register register, register
4178bool AsmParser::parseDirectiveCFIRegister(SMLoc DirectiveLoc) {
4179 int64_t Register1 = 0, Register2 = 0;
4180 if (parseRegisterOrRegisterNumber(Register1, DirectiveLoc) ||
4181 parseToken(AsmToken::Comma, "unexpected token in directive") ||
4182 parseRegisterOrRegisterNumber(Register2, DirectiveLoc) || parseEOL())
4183 return true;
4184
4185 getStreamer().emitCFIRegister(Register1, Register2);
4186 return false;
4187}
4188
4189/// parseDirectiveCFIWindowSave
4190/// ::= .cfi_window_save
4191bool AsmParser::parseDirectiveCFIWindowSave() {
4192 if (parseEOL())
4193 return true;
4194 getStreamer().emitCFIWindowSave();
4195 return false;
4196}
4197
4198/// parseDirectiveCFIAdjustCfaOffset
4199/// ::= .cfi_adjust_cfa_offset adjustment
4200bool AsmParser::parseDirectiveCFIAdjustCfaOffset() {
4201 int64_t Adjustment = 0;
4202 if (parseAbsoluteExpression(Adjustment) || parseEOL())
4203 return true;
4204
4205 getStreamer().emitCFIAdjustCfaOffset(Adjustment);
4206 return false;
4207}
4208
4209/// parseDirectiveCFIDefCfaRegister
4210/// ::= .cfi_def_cfa_register register
4211bool AsmParser::parseDirectiveCFIDefCfaRegister(SMLoc DirectiveLoc) {
4212 int64_t Register = 0;
4213 if (parseRegisterOrRegisterNumber(Register, DirectiveLoc) || parseEOL())
4214 return true;
4215
4216 getStreamer().emitCFIDefCfaRegister(Register);
4217 return false;
4218}
4219
4220/// parseDirectiveCFIOffset
4221/// ::= .cfi_offset register, offset
4222bool AsmParser::parseDirectiveCFIOffset(SMLoc DirectiveLoc) {
4223 int64_t Register = 0;
4224 int64_t Offset = 0;
4225
4226 if (parseRegisterOrRegisterNumber(Register, DirectiveLoc) ||
4227 parseToken(AsmToken::Comma, "unexpected token in directive") ||
4228 parseAbsoluteExpression(Offset) || parseEOL())
4229 return true;
4230
4231 getStreamer().emitCFIOffset(Register, Offset);
4232 return false;
4233}
4234
4235/// parseDirectiveCFIRelOffset
4236/// ::= .cfi_rel_offset register, offset
4237bool AsmParser::parseDirectiveCFIRelOffset(SMLoc DirectiveLoc) {
4238 int64_t Register = 0, Offset = 0;
4239
4240 if (parseRegisterOrRegisterNumber(Register, DirectiveLoc) ||
4241 parseToken(AsmToken::Comma, "unexpected token in directive") ||
4242 parseAbsoluteExpression(Offset) || parseEOL())
4243 return true;
4244
4245 getStreamer().emitCFIRelOffset(Register, Offset);
4246 return false;
4247}
4248
4249static bool isValidEncoding(int64_t Encoding) {
4250 if (Encoding & ~0xff)
4251 return false;
4252
4253 if (Encoding == dwarf::DW_EH_PE_omit)
4254 return true;
4255
4256 const unsigned Format = Encoding & 0xf;
4257 if (Format != dwarf::DW_EH_PE_absptr && Format != dwarf::DW_EH_PE_udata2 &&
4258 Format != dwarf::DW_EH_PE_udata4 && Format != dwarf::DW_EH_PE_udata8 &&
4259 Format != dwarf::DW_EH_PE_sdata2 && Format != dwarf::DW_EH_PE_sdata4 &&
4260 Format != dwarf::DW_EH_PE_sdata8 && Format != dwarf::DW_EH_PE_signed)
4261 return false;
4262
4263 const unsigned Application = Encoding & 0x70;
4264 if (Application != dwarf::DW_EH_PE_absptr &&
4265 Application != dwarf::DW_EH_PE_pcrel)
4266 return false;
4267
4268 return true;
4269}
4270
4271/// parseDirectiveCFIPersonalityOrLsda
4272/// IsPersonality true for cfi_personality, false for cfi_lsda
4273/// ::= .cfi_personality encoding, [symbol_name]
4274/// ::= .cfi_lsda encoding, [symbol_name]
4275bool AsmParser::parseDirectiveCFIPersonalityOrLsda(bool IsPersonality) {
4276 int64_t Encoding = 0;
4277 if (parseAbsoluteExpression(Encoding))
4278 return true;
4279 if (Encoding == dwarf::DW_EH_PE_omit)
4280 return false;
4281
4282 StringRef Name;
4283 if (check(!isValidEncoding(Encoding), "unsupported encoding.") ||
4284 parseToken(AsmToken::Comma, "unexpected token in directive") ||
4285 check(parseIdentifier(Name), "expected identifier in directive") ||
4286 parseEOL())
4287 return true;
4288
4289 MCSymbol *Sym = getContext().getOrCreateSymbol(Name);
4290
4291 if (IsPersonality)
4292 getStreamer().emitCFIPersonality(Sym, Encoding);
4293 else
4294 getStreamer().emitCFILsda(Sym, Encoding);
4295 return false;
4296}
4297
4298/// parseDirectiveCFIRememberState
4299/// ::= .cfi_remember_state
4300bool AsmParser::parseDirectiveCFIRememberState() {
4301 if (parseEOL())
4302 return true;
4303 getStreamer().emitCFIRememberState();
4304 return false;
4305}
4306
4307/// parseDirectiveCFIRestoreState
4308/// ::= .cfi_remember_state
4309bool AsmParser::parseDirectiveCFIRestoreState() {
4310 if (parseEOL())
4311 return true;
4312 getStreamer().emitCFIRestoreState();
4313 return false;
4314}
4315
4316/// parseDirectiveCFISameValue
4317/// ::= .cfi_same_value register
4318bool AsmParser::parseDirectiveCFISameValue(SMLoc DirectiveLoc) {
4319 int64_t Register = 0;
4320
4321 if (parseRegisterOrRegisterNumber(Register, DirectiveLoc) || parseEOL())
4322 return true;
4323
4324 getStreamer().emitCFISameValue(Register);
4325 return false;
4326}
4327
4328/// parseDirectiveCFIRestore
4329/// ::= .cfi_restore register
4330bool AsmParser::parseDirectiveCFIRestore(SMLoc DirectiveLoc) {
4331 int64_t Register = 0;
4332 if (parseRegisterOrRegisterNumber(Register, DirectiveLoc) || parseEOL())
4333 return true;
4334
4335 getStreamer().emitCFIRestore(Register);
4336 return false;
4337}
4338
4339/// parseDirectiveCFIEscape
4340/// ::= .cfi_escape expression[,...]
4341bool AsmParser::parseDirectiveCFIEscape() {
4342 std::string Values;
4343 int64_t CurrValue;
4344 if (parseAbsoluteExpression(CurrValue))
4345 return true;
4346
4347 Values.push_back((uint8_t)CurrValue);
4348
4349 while (getLexer().is(AsmToken::Comma)) {
4350 Lex();
4351
4352 if (parseAbsoluteExpression(CurrValue))
4353 return true;
4354
4355 Values.push_back((uint8_t)CurrValue);
4356 }
4357
4358 getStreamer().emitCFIEscape(Values);
4359 return false;
4360}
4361
4362/// parseDirectiveCFIReturnColumn
4363/// ::= .cfi_return_column register
4364bool AsmParser::parseDirectiveCFIReturnColumn(SMLoc DirectiveLoc) {
4365 int64_t Register = 0;
4366 if (parseRegisterOrRegisterNumber(Register, DirectiveLoc) || parseEOL())
4367 return true;
4368 getStreamer().emitCFIReturnColumn(Register);
4369 return false;
4370}
4371
4372/// parseDirectiveCFISignalFrame
4373/// ::= .cfi_signal_frame
4374bool AsmParser::parseDirectiveCFISignalFrame() {
4375 if (parseEOL())
4376 return true;
4377
4378 getStreamer().emitCFISignalFrame();
4379 return false;
4380}
4381
4382/// parseDirectiveCFIUndefined
4383/// ::= .cfi_undefined register
4384bool AsmParser::parseDirectiveCFIUndefined(SMLoc DirectiveLoc) {
4385 int64_t Register = 0;
4386
4387 if (parseRegisterOrRegisterNumber(Register, DirectiveLoc) || parseEOL())
4388 return true;
4389
4390 getStreamer().emitCFIUndefined(Register);
4391 return false;
4392}
4393
4394/// parseDirectiveAltmacro
4395/// ::= .altmacro
4396/// ::= .noaltmacro
4397bool AsmParser::parseDirectiveAltmacro(StringRef Directive) {
4398 if (parseEOL())
4399 return true;
4400 AltMacroMode = (Directive == ".altmacro");
4401 return false;
4402}
4403
4404/// parseDirectiveMacrosOnOff
4405/// ::= .macros_on
4406/// ::= .macros_off
4407bool AsmParser::parseDirectiveMacrosOnOff(StringRef Directive) {
4408 if (parseEOL())
4409 return true;
4410 setMacrosEnabled(Directive == ".macros_on");
4411 return false;
4412}
4413
4414/// parseDirectiveMacro
4415/// ::= .macro name[,] [parameters]
4416bool AsmParser::parseDirectiveMacro(SMLoc DirectiveLoc) {
4417 StringRef Name;
4418 if (parseIdentifier(Name))
4419 return TokError("expected identifier in '.macro' directive");
4420
4421 if (getLexer().is(AsmToken::Comma))
4422 Lex();
4423
4424 MCAsmMacroParameters Parameters;
4425 while (getLexer().isNot(AsmToken::EndOfStatement)) {
4426
4427 if (!Parameters.empty() && Parameters.back().Vararg)
4428 return Error(Lexer.getLoc(), "vararg parameter '" +
4429 Parameters.back().Name +
4430 "' should be the last parameter");
4431
4432 MCAsmMacroParameter Parameter;
4433 if (parseIdentifier(Parameter.Name))
4434 return TokError("expected identifier in '.macro' directive");
4435
4436 // Emit an error if two (or more) named parameters share the same name
4437 for (const MCAsmMacroParameter& CurrParam : Parameters)
4438 if (CurrParam.Name.equals(Parameter.Name))
4439 return TokError("macro '" + Name + "' has multiple parameters"
4440 " named '" + Parameter.Name + "'");
4441
4442 if (Lexer.is(AsmToken::Colon)) {
4443 Lex(); // consume ':'
4444
4445 SMLoc QualLoc;
4446 StringRef Qualifier;
4447
4448 QualLoc = Lexer.getLoc();
4449 if (parseIdentifier(Qualifier))
4450 return Error(QualLoc, "missing parameter qualifier for "
4451 "'" + Parameter.Name + "' in macro '" + Name + "'");
4452
4453 if (Qualifier == "req")
4454 Parameter.Required = true;
4455 else if (Qualifier == "vararg")
4456 Parameter.Vararg = true;
4457 else
4458 return Error(QualLoc, Qualifier + " is not a valid parameter qualifier "
4459 "for '" + Parameter.Name + "' in macro '" + Name + "'");
4460 }
4461
4462 if (getLexer().is(AsmToken::Equal)) {
4463 Lex();
4464
4465 SMLoc ParamLoc;
4466
4467 ParamLoc = Lexer.getLoc();
4468 if (parseMacroArgument(Parameter.Value, /*Vararg=*/false ))
4469 return true;
4470
4471 if (Parameter.Required)
4472 Warning(ParamLoc, "pointless default value for required parameter "
4473 "'" + Parameter.Name + "' in macro '" + Name + "'");
4474 }
4475
4476 Parameters.push_back(std::move(Parameter));
4477
4478 if (getLexer().is(AsmToken::Comma))
4479 Lex();
4480 }
4481
4482 // Eat just the end of statement.
4483 Lexer.Lex();
4484
4485 // Consuming deferred text, so use Lexer.Lex to ignore Lexing Errors
4486 AsmToken EndToken, StartToken = getTok();
4487 unsigned MacroDepth = 0;
4488 // Lex the macro definition.
4489 while (true) {
4490 // Ignore Lexing errors in macros.
4491 while (Lexer.is(AsmToken::Error)) {
4492 Lexer.Lex();
4493 }
4494
4495 // Check whether we have reached the end of the file.
4496 if (getLexer().is(AsmToken::Eof))
4497 return Error(DirectiveLoc, "no matching '.endmacro' in definition");
4498
4499 // Otherwise, check whether we have reach the .endmacro or the start of a
4500 // preprocessor line marker.
4501 if (getLexer().is(AsmToken::Identifier)) {
4502 if (getTok().getIdentifier() == ".endm" ||
4503 getTok().getIdentifier() == ".endmacro") {
4504 if (MacroDepth == 0) { // Outermost macro.
4505 EndToken = getTok();
4506 Lexer.Lex();
4507 if (getLexer().isNot(AsmToken::EndOfStatement))
4508 return TokError("unexpected token in '" + EndToken.getIdentifier() +
4509 "' directive");
4510 break;
4511 } else {
4512 // Otherwise we just found the end of an inner macro.
4513 --MacroDepth;
4514 }
4515 } else if (getTok().getIdentifier() == ".macro") {
4516 // We allow nested macros. Those aren't instantiated until the outermost
4517 // macro is expanded so just ignore them for now.
4518 ++MacroDepth;
4519 }
4520 } else if (Lexer.is(AsmToken::HashDirective)) {
4521 (void)parseCppHashLineFilenameComment(getLexer().getLoc());
4522 }
4523
4524 // Otherwise, scan til the end of the statement.
4525 eatToEndOfStatement();
4526 }
4527
4528 if (getContext().lookupMacro(Name)) {
4529 return Error(DirectiveLoc, "macro '" + Name + "' is already defined");
4530 }
4531
4532 const char *BodyStart = StartToken.getLoc().getPointer();
4533 const char *BodyEnd = EndToken.getLoc().getPointer();
4534 StringRef Body = StringRef(BodyStart, BodyEnd - BodyStart);
4535 checkForBadMacro(DirectiveLoc, Name, Body, Parameters);
4536 MCAsmMacro Macro(Name, Body, std::move(Parameters));
4537 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)
4538 Macro.dump())do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("asm-macros")) { dbgs() << "Defining new macro:\n"; Macro
.dump(); } } while (false)
;
4539 getContext().defineMacro(Name, std::move(Macro));
4540 return false;
4541}
4542
4543/// checkForBadMacro
4544///
4545/// With the support added for named parameters there may be code out there that
4546/// is transitioning from positional parameters. In versions of gas that did
4547/// not support named parameters they would be ignored on the macro definition.
4548/// But to support both styles of parameters this is not possible so if a macro
4549/// definition has named parameters but does not use them and has what appears
4550/// to be positional parameters, strings like $1, $2, ... and $n, then issue a
4551/// warning that the positional parameter found in body which have no effect.
4552/// Hoping the developer will either remove the named parameters from the macro
4553/// definition so the positional parameters get used if that was what was
4554/// intended or change the macro to use the named parameters. It is possible
4555/// this warning will trigger when the none of the named parameters are used
4556/// and the strings like $1 are infact to simply to be passed trough unchanged.
4557void AsmParser::checkForBadMacro(SMLoc DirectiveLoc, StringRef Name,
4558 StringRef Body,
4559 ArrayRef<MCAsmMacroParameter> Parameters) {
4560 // If this macro is not defined with named parameters the warning we are
4561 // checking for here doesn't apply.
4562 unsigned NParameters = Parameters.size();
4563 if (NParameters == 0)
4564 return;
4565
4566 bool NamedParametersFound = false;
4567 bool PositionalParametersFound = false;
4568
4569 // Look at the body of the macro for use of both the named parameters and what
4570 // are likely to be positional parameters. This is what expandMacro() is
4571 // doing when it finds the parameters in the body.
4572 while (!Body.empty()) {
4573 // Scan for the next possible parameter.
4574 std::size_t End = Body.size(), Pos = 0;
4575 for (; Pos != End; ++Pos) {
4576 // Check for a substitution or escape.
4577 // This macro is defined with parameters, look for \foo, \bar, etc.
4578 if (Body[Pos] == '\\' && Pos + 1 != End)
4579 break;
4580
4581 // This macro should have parameters, but look for $0, $1, ..., $n too.
4582 if (Body[Pos] != '$' || Pos + 1 == End)
4583 continue;
4584 char Next = Body[Pos + 1];
4585 if (Next == '$' || Next == 'n' ||
4586 isdigit(static_cast<unsigned char>(Next)))
4587 break;
4588 }
4589
4590 // Check if we reached the end.
4591 if (Pos == End)
4592 break;
4593
4594 if (Body[Pos] == '$') {
4595 switch (Body[Pos + 1]) {
4596 // $$ => $
4597 case '$':
4598 break;
4599
4600 // $n => number of arguments
4601 case 'n':
4602 PositionalParametersFound = true;
4603 break;
4604
4605 // $[0-9] => argument
4606 default: {
4607 PositionalParametersFound = true;
4608 break;
4609 }
4610 }
4611 Pos += 2;
4612 } else {
4613 unsigned I = Pos + 1;
4614 while (isIdentifierChar(Body[I]) && I + 1 != End)
4615 ++I;
4616
4617 const char *Begin = Body.data() + Pos + 1;
4618 StringRef Argument(Begin, I - (Pos + 1));
4619 unsigned Index = 0;
4620 for (; Index < NParameters; ++Index)
4621 if (Parameters[Index].Name == Argument)
4622 break;
4623
4624 if (Index == NParameters) {
4625 if (Body[Pos + 1] == '(' && Body[Pos + 2] == ')')
4626 Pos += 3;
4627 else {
4628 Pos = I;
4629 }
4630 } else {
4631 NamedParametersFound = true;
4632 Pos += 1 + Argument.size();
4633 }
4634 }
4635 // Update the scan point.
4636 Body = Body.substr(Pos);
4637 }
4638
4639 if (!NamedParametersFound && PositionalParametersFound)
4640 Warning(DirectiveLoc, "macro defined with named parameters which are not "
4641 "used in macro body, possible positional parameter "
4642 "found in body which will have no effect");
4643}
4644
4645/// parseDirectiveExitMacro
4646/// ::= .exitm
4647bool AsmParser::parseDirectiveExitMacro(StringRef Directive) {
4648 if (parseEOL())
4649 return true;
4650
4651 if (!isInsideMacroInstantiation())
4652 return TokError("unexpected '" + Directive + "' in file, "
4653 "no current macro definition");
4654
4655 // Exit all conditionals that are active in the current macro.
4656 while (TheCondStack.size() != ActiveMacros.back()->CondStackDepth) {
4657 TheCondState = TheCondStack.back();
4658 TheCondStack.pop_back();
4659 }
4660
4661 handleMacroExit();
4662 return false;
4663}
4664
4665/// parseDirectiveEndMacro
4666/// ::= .endm
4667/// ::= .endmacro
4668bool AsmParser::parseDirectiveEndMacro(StringRef Directive) {
4669 if (getLexer().isNot(AsmToken::EndOfStatement))
4670 return TokError("unexpected token in '" + Directive + "' directive");
4671
4672 // If we are inside a macro instantiation, terminate the current
4673 // instantiation.
4674 if (isInsideMacroInstantiation()) {
4675 handleMacroExit();
4676 return false;
4677 }
4678
4679 // Otherwise, this .endmacro is a stray entry in the file; well formed
4680 // .endmacro directives are handled during the macro definition parsing.
4681 return TokError("unexpected '" + Directive + "' in file, "
4682 "no current macro definition");
4683}
4684
4685/// parseDirectivePurgeMacro
4686/// ::= .purgem name
4687bool AsmParser::parseDirectivePurgeMacro(SMLoc DirectiveLoc) {
4688 StringRef Name;
4689 SMLoc Loc;
4690 if (parseTokenLoc(Loc) ||
4691 check(parseIdentifier(Name), Loc,
4692 "expected identifier in '.purgem' directive") ||
4693 parseEOL())
4694 return true;
4695
4696 if (!getContext().lookupMacro(Name))
4697 return Error(DirectiveLoc, "macro '" + Name + "' is not defined");
4698
4699 getContext().undefineMacro(Name);
4700 DEBUG_WITH_TYPE("asm-macros", dbgs()do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("asm-macros")) { dbgs() << "Un-defining macro: " <<
Name << "\n"; } } while (false)
4701 << "Un-defining macro: " << Name << "\n")do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("asm-macros")) { dbgs() << "Un-defining macro: " <<
Name << "\n"; } } while (false)
;
4702 return false;
4703}
4704
4705/// parseDirectiveBundleAlignMode
4706/// ::= {.bundle_align_mode} expression
4707bool AsmParser::parseDirectiveBundleAlignMode() {
4708 // Expect a single argument: an expression that evaluates to a constant
4709 // in the inclusive range 0-30.
4710 SMLoc ExprLoc = getLexer().getLoc();
4711 int64_t AlignSizePow2;
4712 if (checkForValidSection() || parseAbsoluteExpression(AlignSizePow2) ||
4713 parseEOL() ||
4714 check(AlignSizePow2 < 0 || AlignSizePow2 > 30, ExprLoc,
4715 "invalid bundle alignment size (expected between 0 and 30)"))
4716 return true;
4717
4718 // Because of AlignSizePow2's verified range we can safely truncate it to
4719 // unsigned.
4720 getStreamer().emitBundleAlignMode(static_cast<unsigned>(AlignSizePow2));
4721 return false;
4722}
4723
4724/// parseDirectiveBundleLock
4725/// ::= {.bundle_lock} [align_to_end]
4726bool AsmParser::parseDirectiveBundleLock() {
4727 if (checkForValidSection())
4728 return true;
4729 bool AlignToEnd = false;
4730
4731 StringRef Option;
4732 SMLoc Loc = getTok().getLoc();
4733 const char *kInvalidOptionError =
4734 "invalid option for '.bundle_lock' directive";
4735
4736 if (!parseOptionalToken(AsmToken::EndOfStatement)) {
4737 if (check(parseIdentifier(Option), Loc, kInvalidOptionError) ||
4738 check(Option != "align_to_end", Loc, kInvalidOptionError) || parseEOL())
4739 return true;
4740 AlignToEnd = true;
4741 }
4742
4743 getStreamer().emitBundleLock(AlignToEnd);
4744 return false;
4745}
4746
4747/// parseDirectiveBundleLock
4748/// ::= {.bundle_lock}
4749bool AsmParser::parseDirectiveBundleUnlock() {
4750 if (checkForValidSection() || parseEOL())
4751 return true;
4752
4753 getStreamer().emitBundleUnlock();
4754 return false;
4755}
4756
4757/// parseDirectiveSpace
4758/// ::= (.skip | .space) expression [ , expression ]
4759bool AsmParser::parseDirectiveSpace(StringRef IDVal) {
4760 SMLoc NumBytesLoc = Lexer.getLoc();
4761 const MCExpr *NumBytes;
4762 if (checkForValidSection() || parseExpression(NumBytes))
4763 return true;
4764
4765 int64_t FillExpr = 0;
4766 if (parseOptionalToken(AsmToken::Comma))
4767 if (parseAbsoluteExpression(FillExpr))
4768 return addErrorSuffix("in '" + Twine(IDVal) + "' directive");
4769 if (parseEOL())
4770 return addErrorSuffix("in '" + Twine(IDVal) + "' directive");
4771
4772 // FIXME: Sometimes the fill expr is 'nop' if it isn't supplied, instead of 0.
4773 getStreamer().emitFill(*NumBytes, FillExpr, NumBytesLoc);
4774
4775 return false;
4776}
4777
4778/// parseDirectiveDCB
4779/// ::= .dcb.{b, l, w} expression, expression
4780bool AsmParser::parseDirectiveDCB(StringRef IDVal, unsigned Size) {
4781 SMLoc NumValuesLoc = Lexer.getLoc();
4782 int64_t NumValues;
4783 if (checkForValidSection() || parseAbsoluteExpression(NumValues))
4784 return true;
4785
4786 if (NumValues < 0) {
4787 Warning(NumValuesLoc, "'" + Twine(IDVal) + "' directive with negative repeat count has no effect");
4788 return false;
4789 }
4790
4791 if (parseToken(AsmToken::Comma,
4792 "unexpected token in '" + Twine(IDVal) + "' directive"))
4793 return true;
4794
4795 const MCExpr *Value;
4796 SMLoc ExprLoc = getLexer().getLoc();
4797 if (parseExpression(Value))
4798 return true;
4799
4800 // Special case constant expressions to match code generator.
4801 if (const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Value)) {
4802 assert(Size <= 8 && "Invalid size")((Size <= 8 && "Invalid size") ? static_cast<void
> (0) : __assert_fail ("Size <= 8 && \"Invalid size\""
, "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/llvm/lib/MC/MCParser/AsmParser.cpp"
, 4802, __PRETTY_FUNCTION__))
;
4803 uint64_t IntValue = MCE->getValue();
4804 if (!isUIntN(8 * Size, IntValue) && !isIntN(8 * Size, IntValue))
4805 return Error(ExprLoc, "literal value out of range for directive");
4806 for (uint64_t i = 0, e = NumValues; i != e; ++i)
4807 getStreamer().emitIntValue(IntValue, Size);
4808 } else {
4809 for (uint64_t i = 0, e = NumValues; i != e; ++i)
4810 getStreamer().emitValue(Value, Size, ExprLoc);
4811 }
4812
4813 return parseEOL();
4814}
4815
4816/// parseDirectiveRealDCB
4817/// ::= .dcb.{d, s} expression, expression
4818bool AsmParser::parseDirectiveRealDCB(StringRef IDVal, const fltSemantics &Semantics) {
4819 SMLoc NumValuesLoc = Lexer.getLoc();
4820 int64_t NumValues;
4821 if (checkForValidSection() || parseAbsoluteExpression(NumValues))
4822 return true;
4823
4824 if (NumValues < 0) {
4825 Warning(NumValuesLoc, "'" + Twine(IDVal) + "' directive with negative repeat count has no effect");
4826 return false;
4827 }
4828
4829 if (parseToken(AsmToken::Comma,
4830 "unexpected token in '" + Twine(IDVal) + "' directive"))
4831 return true;
4832
4833 APInt AsInt;
4834 if (parseRealValue(Semantics, AsInt) || parseEOL())
4835 return true;
4836
4837 for (uint64_t i = 0, e = NumValues; i != e; ++i)
4838 getStreamer().emitIntValue(AsInt.getLimitedValue(),
4839 AsInt.getBitWidth() / 8);
4840
4841 return false;
4842}
4843
4844/// parseDirectiveDS
4845/// ::= .ds.{b, d, l, p, s, w, x} expression
4846bool AsmParser::parseDirectiveDS(StringRef IDVal, unsigned Size) {
4847 SMLoc NumValuesLoc = Lexer.getLoc();
4848 int64_t NumValues;
4849 if (checkForValidSection() || parseAbsoluteExpression(NumValues) ||
4850 parseEOL())
4851 return true;
4852
4853 if (NumValues < 0) {
4854 Warning(NumValuesLoc, "'" + Twine(IDVal) + "' directive with negative repeat count has no effect");
4855 return false;
4856 }
4857
4858 for (uint64_t i = 0, e = NumValues; i != e; ++i)
4859 getStreamer().emitFill(Size, 0);
4860
4861 return false;
4862}
4863
4864/// parseDirectiveLEB128
4865/// ::= (.sleb128 | .uleb128) [ expression (, expression)* ]
4866bool AsmParser::parseDirectiveLEB128(bool Signed) {
4867 if (checkForValidSection())
4868 return true;
4869
4870 auto parseOp = [&]() -> bool {
4871 const MCExpr *Value;
4872 if (parseExpression(Value))
4873 return true;
4874 if (Signed)
4875 getStreamer().emitSLEB128Value(Value);
4876 else
4877 getStreamer().emitULEB128Value(Value);
4878 return false;
4879 };
4880
4881 if (parseMany(parseOp))
4882 return addErrorSuffix(" in directive");
4883
4884 return false;
4885}
4886
4887/// parseDirectiveSymbolAttribute
4888/// ::= { ".globl", ".weak", ... } [ identifier ( , identifier )* ]
4889bool AsmParser::parseDirectiveSymbolAttribute(MCSymbolAttr Attr) {
4890 auto parseOp = [&]() -> bool {
4891 StringRef Name;
4892 SMLoc Loc = getTok().getLoc();
4893 if (parseIdentifier(Name))
4894 return Error(Loc, "expected identifier");
4895
4896 if (discardLTOSymbol(Name))
4897 return false;
4898
4899 MCSymbol *Sym = getContext().getOrCreateSymbol(Name);
4900
4901 // Assembler local symbols don't make any sense here. Complain loudly.
4902 if (Sym->isTemporary())
4903 return Error(Loc, "non-local symbol required");
4904
4905 if (!getStreamer().emitSymbolAttribute(Sym, Attr))
4906 return Error(Loc, "unable to emit symbol attribute");
4907 return false;
4908 };
4909
4910 if (parseMany(parseOp))
4911 return addErrorSuffix(" in directive");
4912 return false;
4913}
4914
4915/// parseDirectiveComm
4916/// ::= ( .comm | .lcomm ) identifier , size_expression [ , align_expression ]
4917bool AsmParser::parseDirectiveComm(bool IsLocal) {
4918 if (checkForValidSection())
4919 return true;
4920
4921 SMLoc IDLoc = getLexer().getLoc();
4922 StringRef Name;
4923 if (parseIdentifier(Name))
4924 return TokError("expected identifier in directive");
4925
4926 // Handle the identifier as the key symbol.
4927 MCSymbol *Sym = getContext().getOrCreateSymbol(Name);
4928
4929 if (getLexer().isNot(AsmToken::Comma))
4930 return TokError("unexpected token in directive");
4931 Lex();
4932
4933 int64_t Size;
4934 SMLoc SizeLoc = getLexer().getLoc();
4935 if (parseAbsoluteExpression(Size))
4936 return true;
4937
4938 int64_t Pow2Alignment = 0;
4939 SMLoc Pow2AlignmentLoc;
4940 if (getLexer().is(AsmToken::Comma)) {
4941 Lex();
4942 Pow2AlignmentLoc = getLexer().getLoc();
4943 if (parseAbsoluteExpression(Pow2Alignment))
4944 return true;
4945
4946 LCOMM::LCOMMType LCOMM = Lexer.getMAI().getLCOMMDirectiveAlignmentType();
4947 if (IsLocal && LCOMM == LCOMM::NoAlignment)
4948 return Error(Pow2AlignmentLoc, "alignment not supported on this target");
4949
4950 // If this target takes alignments in bytes (not log) validate and convert.
4951 if ((!IsLocal && Lexer.getMAI().getCOMMDirectiveAlignmentIsInBytes()) ||
4952 (IsLocal && LCOMM == LCOMM::ByteAlignment)) {
4953 if (!isPowerOf2_64(Pow2Alignment))
4954 return Error(Pow2AlignmentLoc, "alignment must be a power of 2");
4955 Pow2Alignment = Log2_64(Pow2Alignment);
4956 }
4957 }
4958
4959 if (parseEOL())
4960 return true;
4961
4962 // NOTE: a size of zero for a .comm should create a undefined symbol
4963 // but a size of .lcomm creates a bss symbol of size zero.
4964 if (Size < 0)
4965 return Error(SizeLoc, "invalid '.comm' or '.lcomm' directive size, can't "
4966 "be less than zero");
4967
4968 // NOTE: The alignment in the directive is a power of 2 value, the assembler
4969 // may internally end up wanting an alignment in bytes.
4970 // FIXME: Diagnose overflow.
4971 if (Pow2Alignment < 0)
4972 return Error(Pow2AlignmentLoc, "invalid '.comm' or '.lcomm' directive "
4973 "alignment, can't be less than zero");
4974
4975 Sym->redefineIfPossible();
4976 if (!Sym->isUndefined())
4977 return Error(IDLoc, "invalid symbol redefinition");
4978
4979 // Create the Symbol as a common or local common with Size and Pow2Alignment
4980 if (IsLocal) {
4981 getStreamer().emitLocalCommonSymbol(Sym, Size, 1 << Pow2Alignment);
4982 return false;
4983 }
4984
4985 getStreamer().emitCommonSymbol(Sym, Size, 1 << Pow2Alignment);
4986 return false;
4987}
4988
4989/// parseDirectiveAbort
4990/// ::= .abort [... message ...]
4991bool AsmParser::parseDirectiveAbort() {
4992 // FIXME: Use loc from directive.
4993 SMLoc Loc = getLexer().getLoc();
4994
4995 StringRef Str = parseStringToEndOfStatement();
4996 if (parseEOL())
4997 return true;
4998
4999 if (Str.empty())
5000 return Error(Loc, ".abort detected. Assembly stopping.");
5001 else
5002 return Error(Loc, ".abort '" + Str + "' detected. Assembly stopping.");
5003 // FIXME: Actually abort assembly here.
5004
5005 return false;
5006}
5007
5008/// parseDirectiveInclude
5009/// ::= .include "filename"
5010bool AsmParser::parseDirectiveInclude() {
5011 // Allow the strings to have escaped octal character sequence.
5012 std::string Filename;
5013 SMLoc IncludeLoc = getTok().getLoc();
5014
5015 if (check(getTok().isNot(AsmToken::String),
5016 "expected string in '.include' directive") ||
5017 parseEscapedString(Filename) ||
5018 check(getTok().isNot(AsmToken::EndOfStatement),
5019 "unexpected token in '.include' directive") ||
5020 // Attempt to switch the lexer to the included file before consuming the
5021 // end of statement to avoid losing it when we switch.
5022 check(enterIncludeFile(Filename), IncludeLoc,
5023 "Could not find include file '" + Filename + "'"))
5024 return true;
5025
5026 return false;
5027}
5028
5029/// parseDirectiveIncbin
5030/// ::= .incbin "filename" [ , skip [ , count ] ]
5031bool AsmParser::parseDirectiveIncbin() {
5032 // Allow the strings to have escaped octal character sequence.
5033 std::string Filename;
5034 SMLoc IncbinLoc = getTok().getLoc();
5035 if (check(getTok().isNot(AsmToken::String),
5036 "expected string in '.incbin' directive") ||
5037 parseEscapedString(Filename))
5038 return true;
5039
5040 int64_t Skip = 0;
5041 const MCExpr *Count = nullptr;
5042 SMLoc SkipLoc, CountLoc;
5043 if (parseOptionalToken(AsmToken::Comma)) {
5044 // The skip expression can be omitted while specifying the count, e.g:
5045 // .incbin "filename",,4
5046 if (getTok().isNot(AsmToken::Comma)) {
5047 if (parseTokenLoc(SkipLoc) || parseAbsoluteExpression(Skip))
5048 return true;
5049 }
5050 if (parseOptionalToken(AsmToken::Comma)) {
5051 CountLoc = getTok().getLoc();
5052 if (parseExpression(Count))
5053 return true;
5054 }
5055 }
5056
5057 if (parseEOL())
5058 return true;
5059
5060 if (check(Skip < 0, SkipLoc, "skip is negative"))
5061 return true;
5062
5063 // Attempt to process the included file.
5064 if (processIncbinFile(Filename, Skip, Count, CountLoc))
5065 return Error(IncbinLoc, "Could not find incbin file '" + Filename + "'");
5066 return false;
5067}
5068
5069/// parseDirectiveIf
5070/// ::= .if{,eq,ge,gt,le,lt,ne} expression
5071bool AsmParser::parseDirectiveIf(SMLoc DirectiveLoc, DirectiveKind DirKind) {
5072 TheCondStack.push_back(TheCondState);
5073 TheCondState.TheCond = AsmCond::IfCond;
5074 if (TheCondState.Ignore) {
5075 eatToEndOfStatement();
5076 } else {
5077 int64_t ExprValue;
5078 if (parseAbsoluteExpression(ExprValue) || parseEOL())
5079 return true;
5080
5081 switch (DirKind) {
5082 default:
5083 llvm_unreachable("unsupported directive")::llvm::llvm_unreachable_internal("unsupported directive", "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/llvm/lib/MC/MCParser/AsmParser.cpp"
, 5083)
;
5084 case DK_IF:
5085 case DK_IFNE:
5086 break;
5087 case DK_IFEQ:
5088 ExprValue = ExprValue == 0;
5089 break;
5090 case DK_IFGE:
5091 ExprValue = ExprValue >= 0;
5092 break;
5093 case DK_IFGT:
5094 ExprValue = ExprValue > 0;
5095 break;
5096 case DK_IFLE:
5097 ExprValue = ExprValue <= 0;
5098 break;
5099 case DK_IFLT:
5100 ExprValue = ExprValue < 0;
5101 break;
5102 }
5103
5104 TheCondState.CondMet = ExprValue;
5105 TheCondState.Ignore = !TheCondState.CondMet;
5106 }
5107
5108 return false;
5109}
5110
5111/// parseDirectiveIfb
5112/// ::= .ifb string
5113bool AsmParser::parseDirectiveIfb(SMLoc DirectiveLoc, bool ExpectBlank) {
5114 TheCondStack.push_back(TheCondState);
5115 TheCondState.TheCond = AsmCond::IfCond;
5116
5117 if (TheCondState.Ignore) {
5118 eatToEndOfStatement();
5119 } else {
5120 StringRef Str = parseStringToEndOfStatement();
5121
5122 if (parseEOL())
5123 return true;
5124
5125 TheCondState.CondMet = ExpectBlank == Str.empty();
5126 TheCondState.Ignore = !TheCondState.CondMet;
5127 }
5128
5129 return false;
5130}
5131
5132/// parseDirectiveIfc
5133/// ::= .ifc string1, string2
5134/// ::= .ifnc string1, string2
5135bool AsmParser::parseDirectiveIfc(SMLoc DirectiveLoc, bool ExpectEqual) {
5136 TheCondStack.push_back(TheCondState);
5137 TheCondState.TheCond = AsmCond::IfCond;
5138
5139 if (TheCondState.Ignore) {
5140 eatToEndOfStatement();
5141 } else {
5142 StringRef Str1 = parseStringToComma();
5143
5144 if (parseToken(AsmToken::Comma, "unexpected token in '.ifc' directive"))
5145 return true;
5146
5147 StringRef Str2 = parseStringToEndOfStatement();
5148
5149 if (parseEOL())
5150 return true;
5151
5152 TheCondState.CondMet = ExpectEqual == (Str1.trim() == Str2.trim());
5153 TheCondState.Ignore = !TheCondState.CondMet;
5154 }
5155
5156 return false;
5157}
5158
5159/// parseDirectiveIfeqs
5160/// ::= .ifeqs string1, string2
5161bool AsmParser::parseDirectiveIfeqs(SMLoc DirectiveLoc, bool ExpectEqual) {
5162 if (Lexer.isNot(AsmToken::String)) {
5163 if (ExpectEqual)
5164 return TokError("expected string parameter for '.ifeqs' directive");
5165 return TokError("expected string parameter for '.ifnes' directive");
5166 }
5167
5168 StringRef String1 = getTok().getStringContents();
5169 Lex();
5170
5171 if (Lexer.isNot(AsmToken::Comma)) {
5172 if (ExpectEqual)
5173 return TokError(
5174 "expected comma after first string for '.ifeqs' directive");
5175 return TokError("expected comma after first string for '.ifnes' directive");
5176 }
5177
5178 Lex();
5179
5180 if (Lexer.isNot(AsmToken::String)) {
5181 if (ExpectEqual)
5182 return TokError("expected string parameter for '.ifeqs' directive");
5183 return TokError("expected string parameter for '.ifnes' directive");
5184 }
5185
5186 StringRef String2 = getTok().getStringContents();
5187 Lex();
5188
5189 TheCondStack.push_back(TheCondState);
5190 TheCondState.TheCond = AsmCond::IfCond;
5191 TheCondState.CondMet = ExpectEqual == (String1 == String2);
5192 TheCondState.Ignore = !TheCondState.CondMet;
5193
5194 return false;
5195}
5196
5197/// parseDirectiveIfdef
5198/// ::= .ifdef symbol
5199bool AsmParser::parseDirectiveIfdef(SMLoc DirectiveLoc, bool expect_defined) {
5200 StringRef Name;
5201 TheCondStack.push_back(TheCondState);
5202 TheCondState.TheCond = AsmCond::IfCond;
5203
5204 if (TheCondState.Ignore) {
5205 eatToEndOfStatement();
5206 } else {
5207 if (check(parseIdentifier(Name), "expected identifier after '.ifdef'") ||
5208 parseEOL())
5209 return true;
5210
5211 MCSymbol *Sym = getContext().lookupSymbol(Name);
5212
5213 if (expect_defined)
5214 TheCondState.CondMet = (Sym && !Sym->isUndefined(false));
5215 else
5216 TheCondState.CondMet = (!Sym || Sym->isUndefined(false));
5217 TheCondState.Ignore = !TheCondState.CondMet;
5218 }
5219
5220 return false;
5221}
5222
5223/// parseDirectiveElseIf
5224/// ::= .elseif expression
5225bool AsmParser::parseDirectiveElseIf(SMLoc DirectiveLoc) {
5226 if (TheCondState.TheCond != AsmCond::IfCond &&
5227 TheCondState.TheCond != AsmCond::ElseIfCond)
5228 return Error(DirectiveLoc, "Encountered a .elseif that doesn't follow an"
5229 " .if or an .elseif");
5230 TheCondState.TheCond = AsmCond::ElseIfCond;
5231
5232 bool LastIgnoreState = false;
5233 if (!TheCondStack.empty())
5234 LastIgnoreState = TheCondStack.back().Ignore;
5235 if (LastIgnoreState || TheCondState.CondMet) {
5236 TheCondState.Ignore = true;
5237 eatToEndOfStatement();
5238 } else {
5239 int64_t ExprValue;
5240 if (parseAbsoluteExpression(ExprValue))
5241 return true;
5242
5243 if (parseEOL())
5244 return true;
5245
5246 TheCondState.CondMet = ExprValue;
5247 TheCondState.Ignore = !TheCondState.CondMet;
5248 }
5249
5250 return false;
5251}
5252
5253/// parseDirectiveElse
5254/// ::= .else
5255bool AsmParser::parseDirectiveElse(SMLoc DirectiveLoc) {
5256 if (parseEOL())
5257 return true;
5258
5259 if (TheCondState.TheCond != AsmCond::IfCond &&
5260 TheCondState.TheCond != AsmCond::ElseIfCond)
5261 return Error(DirectiveLoc, "Encountered a .else that doesn't follow "
5262 " an .if or an .elseif");
5263 TheCondState.TheCond = AsmCond::ElseCond;
5264 bool LastIgnoreState = false;
5265 if (!TheCondStack.empty())
5266 LastIgnoreState = TheCondStack.back().Ignore;
5267 if (LastIgnoreState || TheCondState.CondMet)
5268 TheCondState.Ignore = true;
5269 else
5270 TheCondState.Ignore = false;
5271
5272 return false;
5273}
5274
5275/// parseDirectiveEnd
5276/// ::= .end
5277bool AsmParser::parseDirectiveEnd(SMLoc DirectiveLoc) {
5278 if (parseEOL())
5279 return true;
5280
5281 while (Lexer.isNot(AsmToken::Eof))
5282 Lexer.Lex();
5283
5284 return false;
5285}
5286
5287/// parseDirectiveError
5288/// ::= .err
5289/// ::= .error [string]
5290bool AsmParser::parseDirectiveError(SMLoc L, bool WithMessage) {
5291 if (!TheCondStack.empty()) {
5292 if (TheCondStack.back().Ignore) {
5293 eatToEndOfStatement();
5294 return false;
5295 }
5296 }
5297
5298 if (!WithMessage)
5299 return Error(L, ".err encountered");
5300
5301 StringRef Message = ".error directive invoked in source file";
5302 if (Lexer.isNot(AsmToken::EndOfStatement)) {
5303 if (Lexer.isNot(AsmToken::String))
5304 return TokError(".error argument must be a string");
5305
5306 Message = getTok().getStringContents();
5307 Lex();
5308 }
5309
5310 return Error(L, Message);
5311}
5312
5313/// parseDirectiveWarning
5314/// ::= .warning [string]
5315bool AsmParser::parseDirectiveWarning(SMLoc L) {
5316 if (!TheCondStack.empty()) {
5317 if (TheCondStack.back().Ignore) {
5318 eatToEndOfStatement();
5319 return false;
5320 }
5321 }
5322
5323 StringRef Message = ".warning directive invoked in source file";
5324
5325 if (!parseOptionalToken(AsmToken::EndOfStatement)) {
5326 if (Lexer.isNot(AsmToken::String))
5327 return TokError(".warning argument must be a string");
5328
5329 Message = getTok().getStringContents();
5330 Lex();
5331 if (parseEOL())
5332 return true;
5333 }
5334
5335 return Warning(L, Message);
5336}
5337
5338/// parseDirectiveEndIf
5339/// ::= .endif
5340bool AsmParser::parseDirectiveEndIf(SMLoc DirectiveLoc) {
5341 if (parseEOL())
5342 return true;
5343
5344 if ((TheCondState.TheCond == AsmCond::NoCond) || TheCondStack.empty())
5345 return Error(DirectiveLoc, "Encountered a .endif that doesn't follow "
5346 "an .if or .else");
5347 if (!TheCondStack.empty()) {
5348 TheCondState = TheCondStack.back();
5349 TheCondStack.pop_back();
5350 }
5351
5352 return false;
5353}
5354
5355void AsmParser::initializeDirectiveKindMap() {
5356 /* Lookup will be done with the directive
5357 * converted to lower case, so all these
5358 * keys should be lower case.
5359 * (target specific directives are handled
5360 * elsewhere)
5361 */
5362 DirectiveKindMap[".set"] = DK_SET;
5363 DirectiveKindMap[".equ"] = DK_EQU;
5364 DirectiveKindMap[".equiv"] = DK_EQUIV;
5365 DirectiveKindMap[".ascii"] = DK_ASCII;
5366 DirectiveKindMap[".asciz"] = DK_ASCIZ;
5367 DirectiveKindMap[".string"] = DK_STRING;
5368 DirectiveKindMap[".byte"] = DK_BYTE;
5369 DirectiveKindMap[".short"] = DK_SHORT;
5370 DirectiveKindMap[".value"] = DK_VALUE;
5371 DirectiveKindMap[".2byte"] = DK_2BYTE;
5372 DirectiveKindMap[".long"] = DK_LONG;
5373 DirectiveKindMap[".int"] = DK_INT;
5374 DirectiveKindMap[".4byte"] = DK_4BYTE;
5375 DirectiveKindMap[".quad"] = DK_QUAD;
5376 DirectiveKindMap[".8byte"] = DK_8BYTE;
5377 DirectiveKindMap[".octa"] = DK_OCTA;
5378 DirectiveKindMap[".single"] = DK_SINGLE;
5379 DirectiveKindMap[".float"] = DK_FLOAT;
5380 DirectiveKindMap[".double"] = DK_DOUBLE;
5381 DirectiveKindMap[".align"] = DK_ALIGN;
5382 DirectiveKindMap[".align32"] = DK_ALIGN32;
5383 DirectiveKindMap[".balign"] = DK_BALIGN;
5384 DirectiveKindMap[".balignw"] = DK_BALIGNW;
5385 DirectiveKindMap[".balignl"] = DK_BALIGNL;
5386 DirectiveKindMap[".p2align"] = DK_P2ALIGN;
5387 DirectiveKindMap[".p2alignw"] = DK_P2ALIGNW;
5388 DirectiveKindMap[".p2alignl"] = DK_P2ALIGNL;
5389 DirectiveKindMap[".org"] = DK_ORG;
5390 DirectiveKindMap[".fill"] = DK_FILL;
5391 DirectiveKindMap[".zero"] = DK_ZERO;
5392 DirectiveKindMap[".extern"] = DK_EXTERN;
5393 DirectiveKindMap[".globl"] = DK_GLOBL;
5394 DirectiveKindMap[".global"] = DK_GLOBAL;
5395 DirectiveKindMap[".lazy_reference"] = DK_LAZY_REFERENCE;
5396 DirectiveKindMap[".no_dead_strip"] = DK_NO_DEAD_STRIP;
5397 DirectiveKindMap[".symbol_resolver"] = DK_SYMBOL_RESOLVER;
5398 DirectiveKindMap[".private_extern"] = DK_PRIVATE_EXTERN;
5399 DirectiveKindMap[".reference"] = DK_REFERENCE;
5400 DirectiveKindMap[".weak_definition"] = DK_WEAK_DEFINITION;
5401 DirectiveKindMap[".weak_reference"] = DK_WEAK_REFERENCE;
5402 DirectiveKindMap[".weak_def_can_be_hidden"] = DK_WEAK_DEF_CAN_BE_HIDDEN;
5403 DirectiveKindMap[".cold"] = DK_COLD;
5404 DirectiveKindMap[".comm"] = DK_COMM;
5405 DirectiveKindMap[".common"] = DK_COMMON;
5406 DirectiveKindMap[".lcomm"] = DK_LCOMM;
5407 DirectiveKindMap[".abort"] = DK_ABORT;
5408 DirectiveKindMap[".include"] = DK_INCLUDE;
5409 DirectiveKindMap[".incbin"] = DK_INCBIN;
5410 DirectiveKindMap[".code16"] = DK_CODE16;
5411 DirectiveKindMap[".code16gcc"] = DK_CODE16GCC;
5412 DirectiveKindMap[".rept"] = DK_REPT;
5413 DirectiveKindMap[".rep"] = DK_REPT;
5414 DirectiveKindMap[".irp"] = DK_IRP;
5415 DirectiveKindMap[".irpc"] = DK_IRPC;
5416 DirectiveKindMap[".endr"] = DK_ENDR;
5417 DirectiveKindMap[".bundle_align_mode"] = DK_BUNDLE_ALIGN_MODE;
5418 DirectiveKindMap[".bundle_lock"] = DK_BUNDLE_LOCK;
5419 DirectiveKindMap[".bundle_unlock"] = DK_BUNDLE_UNLOCK;
5420 DirectiveKindMap[".if"] = DK_IF;
5421 DirectiveKindMap[".ifeq"] = DK_IFEQ;
5422 DirectiveKindMap[".ifge"] = DK_IFGE;
5423 DirectiveKindMap[".ifgt"] = DK_IFGT;
5424 DirectiveKindMap[".ifle"] = DK_IFLE;
5425 DirectiveKindMap[".iflt"] = DK_IFLT;
5426 DirectiveKindMap[".ifne"] = DK_IFNE;
5427 DirectiveKindMap[".ifb"] = DK_IFB;
5428 DirectiveKindMap[".ifnb"] = DK_IFNB;
5429 DirectiveKindMap[".ifc"] = DK_IFC;
5430 DirectiveKindMap[".ifeqs"] = DK_IFEQS;
5431 DirectiveKindMap[".ifnc"] = DK_IFNC;
5432 DirectiveKindMap[".ifnes"] = DK_IFNES;
5433 DirectiveKindMap[".ifdef"] = DK_IFDEF;
5434 DirectiveKindMap[".ifndef"] = DK_IFNDEF;
5435 DirectiveKindMap[".ifnotdef"] = DK_IFNOTDEF;
5436 DirectiveKindMap[".elseif"] = DK_ELSEIF;
5437 DirectiveKindMap[".else"] = DK_ELSE;
5438 DirectiveKindMap[".end"] = DK_END;
5439 DirectiveKindMap[".endif"] = DK_ENDIF;
5440 DirectiveKindMap[".skip"] = DK_SKIP;
5441 DirectiveKindMap[".space"] = DK_SPACE;
5442 DirectiveKindMap[".file"] = DK_FILE;
5443 DirectiveKindMap[".line"] = DK_LINE;
5444 DirectiveKindMap[".loc"] = DK_LOC;
5445 DirectiveKindMap[".stabs"] = DK_STABS;
5446 DirectiveKindMap[".cv_file"] = DK_CV_FILE;
5447 DirectiveKindMap[".cv_func_id"] = DK_CV_FUNC_ID;
5448 DirectiveKindMap[".cv_loc"] = DK_CV_LOC;
5449 DirectiveKindMap[".cv_linetable"] = DK_CV_LINETABLE;
5450 DirectiveKindMap[".cv_inline_linetable"] = DK_CV_INLINE_LINETABLE;
5451 DirectiveKindMap[".cv_inline_site_id"] = DK_CV_INLINE_SITE_ID;
5452 DirectiveKindMap[".cv_def_range"] = DK_CV_DEF_RANGE;
5453 DirectiveKindMap[".cv_string"] = DK_CV_STRING;
5454 DirectiveKindMap[".cv_stringtable"] = DK_CV_STRINGTABLE;
5455 DirectiveKindMap[".cv_filechecksums"] = DK_CV_FILECHECKSUMS;
5456 DirectiveKindMap[".cv_filechecksumoffset"] = DK_CV_FILECHECKSUM_OFFSET;
5457 DirectiveKindMap[".cv_fpo_data"] = DK_CV_FPO_DATA;
5458 DirectiveKindMap[".sleb128"] = DK_SLEB128;
5459 DirectiveKindMap[".uleb128"] = DK_ULEB128;
5460 DirectiveKindMap[".cfi_sections"] = DK_CFI_SECTIONS;
5461 DirectiveKindMap[".cfi_startproc"] = DK_CFI_STARTPROC;
5462 DirectiveKindMap[".cfi_endproc"] = DK_CFI_ENDPROC;
5463 DirectiveKindMap[".cfi_def_cfa"] = DK_CFI_DEF_CFA;
5464 DirectiveKindMap[".cfi_def_cfa_offset"] = DK_CFI_DEF_CFA_OFFSET;
5465 DirectiveKindMap[".cfi_adjust_cfa_offset"] = DK_CFI_ADJUST_CFA_OFFSET;
5466 DirectiveKindMap[".cfi_def_cfa_register"] = DK_CFI_DEF_CFA_REGISTER;
5467 DirectiveKindMap[".cfi_offset"] = DK_CFI_OFFSET;
5468 DirectiveKindMap[".cfi_rel_offset"] = DK_CFI_REL_OFFSET;
5469 DirectiveKindMap[".cfi_personality"] = DK_CFI_PERSONALITY;
5470 DirectiveKindMap[".cfi_lsda"] = DK_CFI_LSDA;
5471 DirectiveKindMap[".cfi_remember_state"] = DK_CFI_REMEMBER_STATE;
5472 DirectiveKindMap[".cfi_restore_state"] = DK_CFI_RESTORE_STATE;
5473 DirectiveKindMap[".cfi_same_value"] = DK_CFI_SAME_VALUE;
5474 DirectiveKindMap[".cfi_restore"] = DK_CFI_RESTORE;
5475 DirectiveKindMap[".cfi_escape"] = DK_CFI_ESCAPE;
5476 DirectiveKindMap[".cfi_return_column"] = DK_CFI_RETURN_COLUMN;
5477 DirectiveKindMap[".cfi_signal_frame"] = DK_CFI_SIGNAL_FRAME;
5478 DirectiveKindMap[".cfi_undefined"] = DK_CFI_UNDEFINED;
5479 DirectiveKindMap[".cfi_register"] = DK_CFI_REGISTER;
5480 DirectiveKindMap[".cfi_window_save"] = DK_CFI_WINDOW_SAVE;
5481 DirectiveKindMap[".cfi_b_key_frame"] = DK_CFI_B_KEY_FRAME;
5482 DirectiveKindMap[".macros_on"] = DK_MACROS_ON;
5483 DirectiveKindMap[".macros_off"] = DK_MACROS_OFF;
5484 DirectiveKindMap[".macro"] = DK_MACRO;
5485 DirectiveKindMap[".exitm"] = DK_EXITM;
5486 DirectiveKindMap[".endm"] = DK_ENDM;
5487 DirectiveKindMap[".endmacro"] = DK_ENDMACRO;
5488 DirectiveKindMap[".purgem"] = DK_PURGEM;
5489 DirectiveKindMap[".err"] = DK_ERR;
5490 DirectiveKindMap[".error"] = DK_ERROR;
5491 DirectiveKindMap[".warning"] = DK_WARNING;
5492 DirectiveKindMap[".altmacro"] = DK_ALTMACRO;
5493 DirectiveKindMap[".noaltmacro"] = DK_NOALTMACRO;
5494 DirectiveKindMap[".reloc"] = DK_RELOC;
5495 DirectiveKindMap[".dc"] = DK_DC;
5496 DirectiveKindMap[".dc.a"] = DK_DC_A;
5497 DirectiveKindMap[".dc.b"] = DK_DC_B;
5498 DirectiveKindMap[".dc.d"] = DK_DC_D;
5499 DirectiveKindMap[".dc.l"] = DK_DC_L;
5500 DirectiveKindMap[".dc.s"] = DK_DC_S;
5501 DirectiveKindMap[".dc.w"] = DK_DC_W;
5502 DirectiveKindMap[".dc.x"] = DK_DC_X;
5503 DirectiveKindMap[".dcb"] = DK_DCB;
5504 DirectiveKindMap[".dcb.b"] = DK_DCB_B;
5505 DirectiveKindMap[".dcb.d"] = DK_DCB_D;
5506 DirectiveKindMap[".dcb.l"] = DK_DCB_L;
5507 DirectiveKindMap[".dcb.s"] = DK_DCB_S;
5508 DirectiveKindMap[".dcb.w"] = DK_DCB_W;
5509 DirectiveKindMap[".dcb.x"] = DK_DCB_X;
5510 DirectiveKindMap[".ds"] = DK_DS;
5511 DirectiveKindMap[".ds.b"] = DK_DS_B;
5512 DirectiveKindMap[".ds.d"] = DK_DS_D;
5513 DirectiveKindMap[".ds.l"] = DK_DS_L;
5514 DirectiveKindMap[".ds.p"] = DK_DS_P;
5515 DirectiveKindMap[".ds.s"] = DK_DS_S;
5516 DirectiveKindMap[".ds.w"] = DK_DS_W;
5517 DirectiveKindMap[".ds.x"] = DK_DS_X;
5518 DirectiveKindMap[".print"] = DK_PRINT;
5519 DirectiveKindMap[".addrsig"] = DK_ADDRSIG;
5520 DirectiveKindMap[".addrsig_sym"] = DK_ADDRSIG_SYM;
5521 DirectiveKindMap[".pseudoprobe"] = DK_PSEUDO_PROBE;
5522 DirectiveKindMap[".lto_discard"] = DK_LTO_DISCARD;
5523}
5524
5525MCAsmMacro *AsmParser::parseMacroLikeBody(SMLoc DirectiveLoc) {
5526 AsmToken EndToken, StartToken = getTok();
5527
5528 unsigned NestLevel = 0;
5529 while (true) {
5530 // Check whether we have reached the end of the file.
5531 if (getLexer().is(AsmToken::Eof)) {
5532 printError(DirectiveLoc, "no matching '.endr' in definition");
5533 return nullptr;
5534 }
5535
5536 if (Lexer.is(AsmToken::Identifier) &&
5537 (getTok().getIdentifier() == ".rep" ||
5538 getTok().getIdentifier() == ".rept" ||
5539 getTok().getIdentifier() == ".irp" ||
5540 getTok().getIdentifier() == ".irpc")) {
5541 ++NestLevel;
5542 }
5543
5544 // Otherwise, check whether we have reached the .endr.
5545 if (Lexer.is(AsmToken::Identifier) && getTok().getIdentifier() == ".endr") {
5546 if (NestLevel == 0) {
5547 EndToken = getTok();
5548 Lex();
5549 if (Lexer.isNot(AsmToken::EndOfStatement)) {
5550 printError(getTok().getLoc(),
5551 "unexpected token in '.endr' directive");
5552 return nullptr;
5553 }
5554 break;
5555 }
5556 --NestLevel;
5557 }
5558
5559 // Otherwise, scan till the end of the statement.
5560 eatToEndOfStatement();
5561 }
5562
5563 const char *BodyStart = StartToken.getLoc().getPointer();
5564 const char *BodyEnd = EndToken.getLoc().getPointer();
5565 StringRef Body = StringRef(BodyStart, BodyEnd - BodyStart);
5566
5567 // We Are Anonymous.
5568 MacroLikeBodies.emplace_back(StringRef(), Body, MCAsmMacroParameters());
5569 return &MacroLikeBodies.back();
5570}
5571
5572void AsmParser::instantiateMacroLikeBody(MCAsmMacro *M, SMLoc DirectiveLoc,
5573 raw_svector_ostream &OS) {
5574 OS << ".endr\n";
5575
5576 std::unique_ptr<MemoryBuffer> Instantiation =
5577 MemoryBuffer::getMemBufferCopy(OS.str(), "<instantiation>");
5578
5579 // Create the macro instantiation object and add to the current macro
5580 // instantiation stack.
5581 MacroInstantiation *MI = new MacroInstantiation{
5582 DirectiveLoc, CurBuffer, getTok().getLoc(), TheCondStack.size()};
5583 ActiveMacros.push_back(MI);
5584
5585 // Jump to the macro instantiation and prime the lexer.
5586 CurBuffer = SrcMgr.AddNewSourceBuffer(std::move(Instantiation), SMLoc());
5587 Lexer.setBuffer(SrcMgr.getMemoryBuffer(CurBuffer)->getBuffer());
5588 Lex();
5589}
5590
5591/// parseDirectiveRept
5592/// ::= .rep | .rept count
5593bool AsmParser::parseDirectiveRept(SMLoc DirectiveLoc, StringRef Dir) {
5594 const MCExpr *CountExpr;
5595 SMLoc CountLoc = getTok().getLoc();
5596 if (parseExpression(CountExpr))
5597 return true;
5598
5599 int64_t Count;
5600 if (!CountExpr->evaluateAsAbsolute(Count, getStreamer().getAssemblerPtr())) {
5601 return Error(CountLoc, "unexpected token in '" + Dir + "' directive");
5602 }
5603
5604 if (check(Count < 0, CountLoc, "Count is negative") || parseEOL())
5605 return true;
5606
5607 // Lex the rept definition.
5608 MCAsmMacro *M = parseMacroLikeBody(DirectiveLoc);
5609 if (!M)
5610 return true;
5611
5612 // Macro instantiation is lexical, unfortunately. We construct a new buffer
5613 // to hold the macro body with substitutions.
5614 SmallString<256> Buf;
5615 raw_svector_ostream OS(Buf);
5616 while (Count--) {
5617 // Note that the AtPseudoVariable is disabled for instantiations of .rep(t).
5618 if (expandMacro(OS, M->Body, None, None, false, getTok().getLoc()))
5619 return true;
5620 }
5621 instantiateMacroLikeBody(M, DirectiveLoc, OS);
5622
5623 return false;
5624}
5625
5626/// parseDirectiveIrp
5627/// ::= .irp symbol,values
5628bool AsmParser::parseDirectiveIrp(SMLoc DirectiveLoc) {
5629 MCAsmMacroParameter Parameter;
5630 MCAsmMacroArguments A;
5631 if (check(parseIdentifier(Parameter.Name),
5632 "expected identifier in '.irp' directive") ||
5633 parseToken(AsmToken::Comma, "expected comma in '.irp' directive") ||
5634 parseMacroArguments(nullptr, A) || parseEOL())
5635 return true;
5636
5637 // Lex the irp definition.
5638 MCAsmMacro *M = parseMacroLikeBody(DirectiveLoc);
5639 if (!M)
5640 return true;
5641
5642 // Macro instantiation is lexical, unfortunately. We construct a new buffer
5643 // to hold the macro body with substitutions.
5644 SmallString<256> Buf;
5645 raw_svector_ostream OS(Buf);
5646
5647 for (const MCAsmMacroArgument &Arg : A) {
5648 // Note that the AtPseudoVariable is enabled for instantiations of .irp.
5649 // This is undocumented, but GAS seems to support it.
5650 if (expandMacro(OS, M->Body, Parameter, Arg, true, getTok().getLoc()))
5651 return true;
5652 }
5653
5654 instantiateMacroLikeBody(M, DirectiveLoc, OS);
5655
5656 return false;
5657}
5658
5659/// parseDirectiveIrpc
5660/// ::= .irpc symbol,values
5661bool AsmParser::parseDirectiveIrpc(SMLoc DirectiveLoc) {
5662 MCAsmMacroParameter Parameter;
5663 MCAsmMacroArguments A;
5664
5665 if (check(parseIdentifier(Parameter.Name),
5666 "expected identifier in '.irpc' directive") ||
5667 parseToken(AsmToken::Comma, "expected comma in '.irpc' directive") ||
5668 parseMacroArguments(nullptr, A))
5669 return true;
5670
5671 if (A.size() != 1 || A.front().size() != 1)
5672 return TokError("unexpected token in '.irpc' directive");
5673 if (parseEOL())
5674 return true;
5675
5676 // Lex the irpc definition.
5677 MCAsmMacro *M = parseMacroLikeBody(DirectiveLoc);
5678 if (!M)
5679 return true;
5680
5681 // Macro instantiation is lexical, unfortunately. We construct a new buffer
5682 // to hold the macro body with substitutions.
5683 SmallString<256> Buf;
5684 raw_svector_ostream OS(Buf);
5685
5686 StringRef Values = A.front().front().getString();
5687 for (std::size_t I = 0, End = Values.size(); I != End; ++I) {
5688 MCAsmMacroArgument Arg;
5689 Arg.emplace_back(AsmToken::Identifier, Values.slice(I, I + 1));
5690
5691 // Note that the AtPseudoVariable is enabled for instantiations of .irpc.
5692 // This is undocumented, but GAS seems to support it.
5693 if (expandMacro(OS, M->Body, Parameter, Arg, true, getTok().getLoc()))
5694 return true;
5695 }
5696
5697 instantiateMacroLikeBody(M, DirectiveLoc, OS);
5698
5699 return false;
5700}
5701
5702bool AsmParser::parseDirectiveEndr(SMLoc DirectiveLoc) {
5703 if (ActiveMacros.empty())
5704 return TokError("unmatched '.endr' directive");
5705
5706 // The only .repl that should get here are the ones created by
5707 // instantiateMacroLikeBody.
5708 assert(getLexer().is(AsmToken::EndOfStatement))((getLexer().is(AsmToken::EndOfStatement)) ? static_cast<void
> (0) : __assert_fail ("getLexer().is(AsmToken::EndOfStatement)"
, "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/llvm/lib/MC/MCParser/AsmParser.cpp"
, 5708, __PRETTY_FUNCTION__))
;
5709
5710 handleMacroExit();
5711 return false;
5712}
5713
5714bool AsmParser::parseDirectiveMSEmit(SMLoc IDLoc, ParseStatementInfo &Info,
5715 size_t Len) {
5716 const MCExpr *Value;
5717 SMLoc ExprLoc = getLexer().getLoc();
5718 if (parseExpression(Value))
5719 return true;
5720 const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Value);
5721 if (!MCE)
5722 return Error(ExprLoc, "unexpected expression in _emit");
5723 uint64_t IntValue = MCE->getValue();
5724 if (!isUInt<8>(IntValue) && !isInt<8>(IntValue))
5725 return Error(ExprLoc, "literal value out of range for directive");
5726
5727 Info.AsmRewrites->emplace_back(AOK_Emit, IDLoc, Len);
5728 return false;
5729}
5730
5731bool AsmParser::parseDirectiveMSAlign(SMLoc IDLoc, ParseStatementInfo &Info) {
5732 const MCExpr *Value;
5733 SMLoc ExprLoc = getLexer().getLoc();
5734 if (parseExpression(Value))
5735 return true;
5736 const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Value);
5737 if (!MCE)
5738 return Error(ExprLoc, "unexpected expression in align");
5739 uint64_t IntValue = MCE->getValue();
5740 if (!isPowerOf2_64(IntValue))
5741 return Error(ExprLoc, "literal value not a power of two greater then zero");
5742
5743 Info.AsmRewrites->emplace_back(AOK_Align, IDLoc, 5, Log2_64(IntValue));
5744 return false;
5745}
5746
5747bool AsmParser::parseDirectivePrint(SMLoc DirectiveLoc) {
5748 const AsmToken StrTok = getTok();
5749 Lex();
5750 if (StrTok.isNot(AsmToken::String) || StrTok.getString().front() != '"')
5751 return Error(DirectiveLoc, "expected double quoted string after .print");
5752 if (parseEOL())
5753 return true;
5754 llvm::outs() << StrTok.getStringContents() << '\n';
5755 return false;
5756}
5757
5758bool AsmParser::parseDirectiveAddrsig() {
5759 if (parseEOL())
5760 return true;
5761 getStreamer().emitAddrsig();
5762 return false;
5763}
5764
5765bool AsmParser::parseDirectiveAddrsigSym() {
5766 StringRef Name;
5767 if (check(parseIdentifier(Name), "expected identifier") || parseEOL())
5768 return true;
5769 MCSymbol *Sym = getContext().getOrCreateSymbol(Name);
5770 getStreamer().emitAddrsigSym(Sym);
5771 return false;
5772}
5773
5774bool AsmParser::parseDirectivePseudoProbe() {
5775 int64_t Guid;
30
'Guid' declared without an initial value
5776 int64_t Index;
5777 int64_t Type;
5778 int64_t Attr;
5779
5780 if (getLexer().is(AsmToken::Integer)) {
31
Calling 'MCAsmLexer::is'
37
Returning from 'MCAsmLexer::is'
38
Taking false branch
5781 if (parseIntToken(Guid, "unexpected token in '.pseudoprobe' directive"))
5782 return true;
5783 }
5784
5785 if (getLexer().is(AsmToken::Integer)) {
39
Calling 'MCAsmLexer::is'
45
Returning from 'MCAsmLexer::is'
46
Taking false branch
5786 if (parseIntToken(Index, "unexpected token in '.pseudoprobe' directive"))
5787 return true;
5788 }
5789
5790 if (getLexer().is(AsmToken::Integer)) {
47
Calling 'MCAsmLexer::is'
53
Returning from 'MCAsmLexer::is'
54
Taking false branch
5791 if (parseIntToken(Type, "unexpected token in '.pseudoprobe' directive"))
5792 return true;
5793 }
5794
5795 if (getLexer().is(AsmToken::Integer)) {
55
Calling 'MCAsmLexer::is'
61
Returning from 'MCAsmLexer::is'
62
Taking false branch
5796 if (parseIntToken(Attr, "unexpected token in '.pseudoprobe' directive"))
5797 return true;
5798 }
5799
5800 // Parse inline stack like @ GUID:11:12 @ GUID:1:11 @ GUID:3:21
5801 MCPseudoProbeInlineStack InlineStack;
5802
5803 while (getLexer().is(AsmToken::At)) {
63
Calling 'MCAsmLexer::is'
69
Returning from 'MCAsmLexer::is'
70
Loop condition is false. Execution continues on line 5829
5804 // eat @
5805 Lex();
5806
5807 int64_t CallerGuid = 0;
5808 if (getLexer().is(AsmToken::Integer)) {
5809 if (parseIntToken(CallerGuid,
5810 "unexpected token in '.pseudoprobe' directive"))
5811 return true;
5812 }
5813
5814 // eat colon
5815 if (getLexer().is(AsmToken::Colon))
5816 Lex();
5817
5818 int64_t CallerProbeId = 0;
5819 if (getLexer().is(AsmToken::Integer)) {
5820 if (parseIntToken(CallerProbeId,
5821 "unexpected token in '.pseudoprobe' directive"))
5822 return true;
5823 }
5824
5825 InlineSite Site(CallerGuid, CallerProbeId);
5826 InlineStack.push_back(Site);
5827 }
5828
5829 if (parseEOL())
71
Assuming the condition is false
72
Taking false branch
5830 return true;
5831
5832 getStreamer().emitPseudoProbe(Guid, Index, Type, Attr, InlineStack);
73
1st function call argument is an uninitialized value
5833 return false;
5834}
5835
5836/// parseDirectiveLTODiscard
5837/// ::= ".lto_discard" [ identifier ( , identifier )* ]
5838/// The LTO library emits this directive to discard non-prevailing symbols.
5839/// We ignore symbol assignments and attribute changes for the specified
5840/// symbols.
5841bool AsmParser::parseDirectiveLTODiscard() {
5842 auto ParseOp = [&]() -> bool {
5843 StringRef Name;
5844 SMLoc Loc = getTok().getLoc();
5845 if (parseIdentifier(Name))
5846 return Error(Loc, "expected identifier");
5847 LTODiscardSymbols.insert(Name);
5848 return false;
5849 };
5850
5851 LTODiscardSymbols.clear();
5852 if (parseMany(ParseOp))
5853 return addErrorSuffix(" in directive");
5854 return false;
5855}
5856
5857// We are comparing pointers, but the pointers are relative to a single string.
5858// Thus, this should always be deterministic.
5859static int rewritesSort(const AsmRewrite *AsmRewriteA,
5860 const AsmRewrite *AsmRewriteB) {
5861 if (AsmRewriteA->Loc.getPointer() < AsmRewriteB->Loc.getPointer())
5862 return -1;
5863 if (AsmRewriteB->Loc.getPointer() < AsmRewriteA->Loc.getPointer())
5864 return 1;
5865
5866 // It's possible to have a SizeDirective, Imm/ImmPrefix and an Input/Output
5867 // rewrite to the same location. Make sure the SizeDirective rewrite is
5868 // performed first, then the Imm/ImmPrefix and finally the Input/Output. This
5869 // ensures the sort algorithm is stable.
5870 if (AsmRewritePrecedence[AsmRewriteA->Kind] >
5871 AsmRewritePrecedence[AsmRewriteB->Kind])
5872 return -1;
5873
5874 if (AsmRewritePrecedence[AsmRewriteA->Kind] <
5875 AsmRewritePrecedence[AsmRewriteB->Kind])
5876 return 1;
5877 llvm_unreachable("Unstable rewrite sort.")::llvm::llvm_unreachable_internal("Unstable rewrite sort.", "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/llvm/lib/MC/MCParser/AsmParser.cpp"
, 5877)
;
5878}
5879
5880bool AsmParser::parseMSInlineAsm(
5881 void *AsmLoc, std::string &AsmString, unsigned &NumOutputs,
5882 unsigned &NumInputs, SmallVectorImpl<std::pair<void *, bool>> &OpDecls,
5883 SmallVectorImpl<std::string> &Constraints,
5884 SmallVectorImpl<std::string> &Clobbers, const MCInstrInfo *MII,
5885 const MCInstPrinter *IP, MCAsmParserSemaCallback &SI) {
5886 SmallVector<void *, 4> InputDecls;
5887 SmallVector<void *, 4> OutputDecls;
5888 SmallVector<bool, 4> InputDeclsAddressOf;
5889 SmallVector<bool, 4> OutputDeclsAddressOf;
5890 SmallVector<std::string, 4> InputConstraints;
5891 SmallVector<std::string, 4> OutputConstraints;
5892 SmallVector<unsigned, 4> ClobberRegs;
5893
5894 SmallVector<AsmRewrite, 4> AsmStrRewrites;
5895
5896 // Prime the lexer.
5897 Lex();
5898
5899 // While we have input, parse each statement.
5900 unsigned InputIdx = 0;
5901 unsigned OutputIdx = 0;
5902 while (getLexer().isNot(AsmToken::Eof)) {
5903 // Parse curly braces marking block start/end
5904 if (parseCurlyBlockScope(AsmStrRewrites))
5905 continue;
5906
5907 ParseStatementInfo Info(&AsmStrRewrites);
5908 bool StatementErr = parseStatement(Info, &SI);
5909
5910 if (StatementErr || Info.ParseError) {
5911 // Emit pending errors if any exist.
5912 printPendingErrors();
5913 return true;
5914 }
5915
5916 // No pending error should exist here.
5917 assert(!hasPendingError() && "unexpected error from parseStatement")((!hasPendingError() && "unexpected error from parseStatement"
) ? static_cast<void> (0) : __assert_fail ("!hasPendingError() && \"unexpected error from parseStatement\""
, "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/llvm/lib/MC/MCParser/AsmParser.cpp"
, 5917, __PRETTY_FUNCTION__))
;
5918
5919 if (Info.Opcode == ~0U)
5920 continue;
5921
5922 const MCInstrDesc &Desc = MII->get(Info.Opcode);
5923
5924 // Build the list of clobbers, outputs and inputs.
5925 for (unsigned i = 1, e = Info.ParsedOperands.size(); i != e; ++i) {
5926 MCParsedAsmOperand &Operand = *Info.ParsedOperands[i];
5927
5928 // Register operand.
5929 if (Operand.isReg() && !Operand.needAddressOf() &&
5930 !getTargetParser().OmitRegisterFromClobberLists(Operand.getReg())) {
5931 unsigned NumDefs = Desc.getNumDefs();
5932 // Clobber.
5933 if (NumDefs && Operand.getMCOperandNum() < NumDefs)
5934 ClobberRegs.push_back(Operand.getReg());
5935 continue;
5936 }
5937
5938 // Expr/Input or Output.
5939 StringRef SymName = Operand.getSymName();
5940 if (SymName.empty())
5941 continue;
5942
5943 void *OpDecl = Operand.getOpDecl();
5944 if (!OpDecl)
5945 continue;
5946
5947 StringRef Constraint = Operand.getConstraint();
5948 if (Operand.isImm()) {
5949 // Offset as immediate
5950 if (Operand.isOffsetOfLocal())
5951 Constraint = "r";
5952 else
5953 Constraint = "i";
5954 }
5955
5956 bool isOutput = (i == 1) && Desc.mayStore();
5957 SMLoc Start = SMLoc::getFromPointer(SymName.data());
5958 if (isOutput) {
5959 ++InputIdx;
5960 OutputDecls.push_back(OpDecl);
5961 OutputDeclsAddressOf.push_back(Operand.needAddressOf());
5962 OutputConstraints.push_back(("=" + Constraint).str());
5963 AsmStrRewrites.emplace_back(AOK_Output, Start, SymName.size());
5964 } else {
5965 InputDecls.push_back(OpDecl);
5966 InputDeclsAddressOf.push_back(Operand.needAddressOf());
5967 InputConstraints.push_back(Constraint.str());
5968 if (Desc.OpInfo[i - 1].isBranchTarget())
5969 AsmStrRewrites.emplace_back(AOK_CallInput, Start, SymName.size());
5970 else
5971 AsmStrRewrites.emplace_back(AOK_Input, Start, SymName.size());
5972 }
5973 }
5974
5975 // Consider implicit defs to be clobbers. Think of cpuid and push.
5976 ArrayRef<MCPhysReg> ImpDefs(Desc.getImplicitDefs(),
5977 Desc.getNumImplicitDefs());
5978 llvm::append_range(ClobberRegs, ImpDefs);
5979 }
5980
5981 // Set the number of Outputs and Inputs.
5982 NumOutputs = OutputDecls.size();
5983 NumInputs = InputDecls.size();
5984
5985 // Set the unique clobbers.
5986 array_pod_sort(ClobberRegs.begin(), ClobberRegs.end());
5987 ClobberRegs.erase(std::unique(ClobberRegs.begin(), ClobberRegs.end()),
5988 ClobberRegs.end());
5989 Clobbers.assign(ClobberRegs.size(), std::string());
5990 for (unsigned I = 0, E = ClobberRegs.size(); I != E; ++I) {
5991 raw_string_ostream OS(Clobbers[I]);
5992 IP->printRegName(OS, ClobberRegs[I]);
5993 }
5994
5995 // Merge the various outputs and inputs. Output are expected first.
5996 if (NumOutputs || NumInputs) {
5997 unsigned NumExprs = NumOutputs + NumInputs;
5998 OpDecls.resize(NumExprs);
5999 Constraints.resize(NumExprs);
6000 for (unsigned i = 0; i < NumOutputs; ++i) {
6001 OpDecls[i] = std::make_pair(OutputDecls[i], OutputDeclsAddressOf[i]);
6002 Constraints[i] = OutputConstraints[i];
6003 }
6004 for (unsigned i = 0, j = NumOutputs; i < NumInputs; ++i, ++j) {
6005 OpDecls[j] = std::make_pair(InputDecls[i], InputDeclsAddressOf[i]);
6006 Constraints[j] = InputConstraints[i];
6007 }
6008 }
6009
6010 // Build the IR assembly string.
6011 std::string AsmStringIR;
6012 raw_string_ostream OS(AsmStringIR);
6013 StringRef ASMString =
6014 SrcMgr.getMemoryBuffer(SrcMgr.getMainFileID())->getBuffer();
6015 const char *AsmStart = ASMString.begin();
6016 const char *AsmEnd = ASMString.end();
6017 array_pod_sort(AsmStrRewrites.begin(), AsmStrRewrites.end(), rewritesSort);
6018 for (auto it = AsmStrRewrites.begin(); it != AsmStrRewrites.end(); ++it) {
6019 const AsmRewrite &AR = *it;
6020 // Check if this has already been covered by another rewrite...
6021 if (AR.Done)
6022 continue;
6023 AsmRewriteKind Kind = AR.Kind;
6024
6025 const char *Loc = AR.Loc.getPointer();
6026 assert(Loc >= AsmStart && "Expected Loc to be at or after Start!")((Loc >= AsmStart && "Expected Loc to be at or after Start!"
) ? static_cast<void> (0) : __assert_fail ("Loc >= AsmStart && \"Expected Loc to be at or after Start!\""
, "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/llvm/lib/MC/MCParser/AsmParser.cpp"
, 6026, __PRETTY_FUNCTION__))
;
6027
6028 // Emit everything up to the immediate/expression.
6029 if (unsigned Len = Loc - AsmStart)
6030 OS << StringRef(AsmStart, Len);
6031
6032 // Skip the original expression.
6033 if (Kind == AOK_Skip) {
6034 AsmStart = Loc + AR.Len;
6035 continue;
6036 }
6037
6038 unsigned AdditionalSkip = 0;
6039 // Rewrite expressions in $N notation.
6040 switch (Kind) {
6041 default:
6042 break;
6043 case AOK_IntelExpr:
6044 assert(AR.IntelExp.isValid() && "cannot write invalid intel expression")((AR.IntelExp.isValid() && "cannot write invalid intel expression"
) ? static_cast<void> (0) : __assert_fail ("AR.IntelExp.isValid() && \"cannot write invalid intel expression\""
, "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/llvm/lib/MC/MCParser/AsmParser.cpp"
, 6044, __PRETTY_FUNCTION__))
;
6045 if (AR.IntelExp.NeedBracs)
6046 OS << "[";
6047 if (AR.IntelExp.hasBaseReg())
6048 OS << AR.IntelExp.BaseReg;
6049 if (AR.IntelExp.hasIndexReg())
6050 OS << (AR.IntelExp.hasBaseReg() ? " + " : "")
6051 << AR.IntelExp.IndexReg;
6052 if (AR.IntelExp.Scale > 1)
6053 OS << " * $$" << AR.IntelExp.Scale;
6054 if (AR.IntelExp.hasOffset()) {
6055 if (AR.IntelExp.hasRegs())
6056 OS << " + ";
6057 // Fuse this rewrite with a rewrite of the offset name, if present.
6058 StringRef OffsetName = AR.IntelExp.OffsetName;
6059 SMLoc OffsetLoc = SMLoc::getFromPointer(AR.IntelExp.OffsetName.data());
6060 size_t OffsetLen = OffsetName.size();
6061 auto rewrite_it = std::find_if(
6062 it, AsmStrRewrites.end(), [&](const AsmRewrite &FusingAR) {
6063 return FusingAR.Loc == OffsetLoc && FusingAR.Len == OffsetLen &&
6064 (FusingAR.Kind == AOK_Input ||
6065 FusingAR.Kind == AOK_CallInput);
6066 });
6067 if (rewrite_it == AsmStrRewrites.end()) {
6068 OS << "offset " << OffsetName;
6069 } else if (rewrite_it->Kind == AOK_CallInput) {
6070 OS << "${" << InputIdx++ << ":P}";
6071 rewrite_it->Done = true;
6072 } else {
6073 OS << '$' << InputIdx++;
6074 rewrite_it->Done = true;
6075 }
6076 }
6077 if (AR.IntelExp.Imm || AR.IntelExp.emitImm())
6078 OS << (AR.IntelExp.emitImm() ? "$$" : " + $$") << AR.IntelExp.Imm;
6079 if (AR.IntelExp.NeedBracs)
6080 OS << "]";
6081 break;
6082 case AOK_Label:
6083 OS << Ctx.getAsmInfo()->getPrivateLabelPrefix() << AR.Label;
6084 break;
6085 case AOK_Input:
6086 OS << '$' << InputIdx++;
6087 break;
6088 case AOK_CallInput:
6089 OS << "${" << InputIdx++ << ":P}";
6090 break;
6091 case AOK_Output:
6092 OS << '$' << OutputIdx++;
6093 break;
6094 case AOK_SizeDirective:
6095 switch (AR.Val) {
6096 default: break;
6097 case 8: OS << "byte ptr "; break;
6098 case 16: OS << "word ptr "; break;
6099 case 32: OS << "dword ptr "; break;
6100 case 64: OS << "qword ptr "; break;
6101 case 80: OS << "xword ptr "; break;
6102 case 128: OS << "xmmword ptr "; break;
6103 case 256: OS << "ymmword ptr "; break;
6104 }
6105 break;
6106 case AOK_Emit:
6107 OS << ".byte";
6108 break;
6109 case AOK_Align: {
6110 // MS alignment directives are measured in bytes. If the native assembler
6111 // measures alignment in bytes, we can pass it straight through.
6112 OS << ".align";
6113 if (getContext().getAsmInfo()->getAlignmentIsInBytes())
6114 break;
6115
6116 // Alignment is in log2 form, so print that instead and skip the original
6117 // immediate.
6118 unsigned Val = AR.Val;
6119 OS << ' ' << Val;
6120 assert(Val < 10 && "Expected alignment less then 2^10.")((Val < 10 && "Expected alignment less then 2^10."
) ? static_cast<void> (0) : __assert_fail ("Val < 10 && \"Expected alignment less then 2^10.\""
, "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/llvm/lib/MC/MCParser/AsmParser.cpp"
, 6120, __PRETTY_FUNCTION__))
;