Bug Summary

File:llvm/lib/MC/MCParser/AsmParser.cpp
Warning:line 5844, 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~++20210306111116+7ae191f59f0f/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~++20210306111116+7ae191f59f0f/build-llvm/lib/MC/MCParser -I /build/llvm-toolchain-snapshot-13~++20210306111116+7ae191f59f0f/llvm/lib/MC/MCParser -I /build/llvm-toolchain-snapshot-13~++20210306111116+7ae191f59f0f/build-llvm/include -I /build/llvm-toolchain-snapshot-13~++20210306111116+7ae191f59f0f/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/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/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~++20210306111116+7ae191f59f0f/build-llvm/lib/MC/MCParser -fdebug-prefix-map=/build/llvm-toolchain-snapshot-13~++20210306111116+7ae191f59f0f=. -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 -o /tmp/scan-build-2021-03-06-174226-36265-1 -x c++ /build/llvm-toolchain-snapshot-13~++20210306111116+7ae191f59f0f/llvm/lib/MC/MCParser/AsmParser.cpp

/build/llvm-toolchain-snapshot-13~++20210306111116+7ae191f59f0f/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/SmallString.h"
19#include "llvm/ADT/SmallVector.h"
20#include "llvm/ADT/StringExtras.h"
21#include "llvm/ADT/StringMap.h"
22#include "llvm/ADT/StringRef.h"
23#include "llvm/ADT/Twine.h"
24#include "llvm/BinaryFormat/Dwarf.h"
25#include "llvm/DebugInfo/CodeView/SymbolRecord.h"
26#include "llvm/MC/MCAsmInfo.h"
27#include "llvm/MC/MCCodeView.h"
28#include "llvm/MC/MCContext.h"
29#include "llvm/MC/MCDirectives.h"
30#include "llvm/MC/MCDwarf.h"
31#include "llvm/MC/MCExpr.h"
32#include "llvm/MC/MCInstPrinter.h"
33#include "llvm/MC/MCInstrDesc.h"
34#include "llvm/MC/MCInstrInfo.h"
35#include "llvm/MC/MCObjectFileInfo.h"
36#include "llvm/MC/MCParser/AsmCond.h"
37#include "llvm/MC/MCParser/AsmLexer.h"
38#include "llvm/MC/MCParser/MCAsmLexer.h"
39#include "llvm/MC/MCParser/MCAsmParser.h"
40#include "llvm/MC/MCParser/MCAsmParserExtension.h"
41#include "llvm/MC/MCParser/MCAsmParserUtils.h"
42#include "llvm/MC/MCParser/MCParsedAsmOperand.h"
43#include "llvm/MC/MCParser/MCTargetAsmParser.h"
44#include "llvm/MC/MCRegisterInfo.h"
45#include "llvm/MC/MCSection.h"
46#include "llvm/MC/MCStreamer.h"
47#include "llvm/MC/MCSymbol.h"
48#include "llvm/MC/MCTargetOptions.h"
49#include "llvm/MC/MCValue.h"
50#include "llvm/Support/Casting.h"
51#include "llvm/Support/CommandLine.h"
52#include "llvm/Support/ErrorHandling.h"
53#include "llvm/Support/MD5.h"
54#include "llvm/Support/MathExtras.h"
55#include "llvm/Support/MemoryBuffer.h"
56#include "llvm/Support/SMLoc.h"
57#include "llvm/Support/SourceMgr.h"
58#include "llvm/Support/raw_ostream.h"
59#include <algorithm>
60#include <cassert>
61#include <cctype>
62#include <climits>
63#include <cstddef>
64#include <cstdint>
65#include <deque>
66#include <memory>
67#include <sstream>
68#include <string>
69#include <tuple>
70#include <utility>
71#include <vector>
72
73using namespace llvm;
74
75MCAsmParserSemaCallback::~MCAsmParserSemaCallback() = default;
76
77extern cl::opt<unsigned> AsmMacroMaxNestingDepth;
78
79namespace {
80
81/// Helper types for tracking macro definitions.
82typedef std::vector<AsmToken> MCAsmMacroArgument;
83typedef std::vector<MCAsmMacroArgument> MCAsmMacroArguments;
84
85/// Helper class for storing information about an active macro
86/// instantiation.
87struct MacroInstantiation {
88 /// The location of the instantiation.
89 SMLoc InstantiationLoc;
90
91 /// The buffer where parsing should resume upon instantiation completion.
92 unsigned ExitBuffer;
93
94 /// The location where parsing should resume upon instantiation completion.
95 SMLoc ExitLoc;
96
97 /// The depth of TheCondStack at the start of the instantiation.
98 size_t CondStackDepth;
99};
100
101struct ParseStatementInfo {
102 /// The parsed operands from the last parsed statement.
103 SmallVector<std::unique_ptr<MCParsedAsmOperand>, 8> ParsedOperands;
104
105 /// The opcode from the last parsed instruction.
106 unsigned Opcode = ~0U;
107
108 /// Was there an error parsing the inline assembly?
109 bool ParseError = false;
110
111 SmallVectorImpl<AsmRewrite> *AsmRewrites = nullptr;
112
113 ParseStatementInfo() = delete;
114 ParseStatementInfo(SmallVectorImpl<AsmRewrite> *rewrites)
115 : AsmRewrites(rewrites) {}
116};
117
118/// The concrete assembly parser instance.
119class AsmParser : public MCAsmParser {
120private:
121 AsmLexer Lexer;
122 MCContext &Ctx;
123 MCStreamer &Out;
124 const MCAsmInfo &MAI;
125 SourceMgr &SrcMgr;
126 SourceMgr::DiagHandlerTy SavedDiagHandler;
127 void *SavedDiagContext;
128 std::unique_ptr<MCAsmParserExtension> PlatformParser;
129 SMLoc StartTokLoc;
130
131 /// This is the current buffer index we're lexing from as managed by the
132 /// SourceMgr object.
133 unsigned CurBuffer;
134
135 AsmCond TheCondState;
136 std::vector<AsmCond> TheCondStack;
137
138 /// maps directive names to handler methods in parser
139 /// extensions. Extensions register themselves in this map by calling
140 /// addDirectiveHandler.
141 StringMap<ExtensionDirectiveHandler> ExtensionDirectiveMap;
142
143 /// Stack of active macro instantiations.
144 std::vector<MacroInstantiation*> ActiveMacros;
145
146 /// List of bodies of anonymous macros.
147 std::deque<MCAsmMacro> MacroLikeBodies;
148
149 /// Boolean tracking whether macro substitution is enabled.
150 unsigned MacrosEnabledFlag : 1;
151
152 /// Keeps track of how many .macro's have been instantiated.
153 unsigned NumOfMacroInstantiations;
154
155 /// The values from the last parsed cpp hash file line comment if any.
156 struct CppHashInfoTy {
157 StringRef Filename;
158 int64_t LineNumber;
159 SMLoc Loc;
160 unsigned Buf;
161 CppHashInfoTy() : Filename(), LineNumber(0), Loc(), Buf(0) {}
162 };
163 CppHashInfoTy CppHashInfo;
164
165 /// The filename from the first cpp hash file line comment, if any.
166 StringRef FirstCppHashFilename;
167
168 /// List of forward directional labels for diagnosis at the end.
169 SmallVector<std::tuple<SMLoc, CppHashInfoTy, MCSymbol *>, 4> DirLabels;
170
171 /// AssemblerDialect. ~OU means unset value and use value provided by MAI.
172 unsigned AssemblerDialect = ~0U;
173
174 /// is Darwin compatibility enabled?
175 bool IsDarwin = false;
176
177 /// Are we parsing ms-style inline assembly?
178 bool ParsingMSInlineAsm = false;
179
180 /// Did we already inform the user about inconsistent MD5 usage?
181 bool ReportedInconsistentMD5 = false;
182
183 // Is alt macro mode enabled.
184 bool AltMacroMode = false;
185
186public:
187 AsmParser(SourceMgr &SM, MCContext &Ctx, MCStreamer &Out,
188 const MCAsmInfo &MAI, unsigned CB);
189 AsmParser(const AsmParser &) = delete;
190 AsmParser &operator=(const AsmParser &) = delete;
191 ~AsmParser() override;
192
193 bool Run(bool NoInitialTextSection, bool NoFinalize = false) override;
194
195 void addDirectiveHandler(StringRef Directive,
196 ExtensionDirectiveHandler Handler) override {
197 ExtensionDirectiveMap[Directive] = Handler;
198 }
199
200 void addAliasForDirective(StringRef Directive, StringRef Alias) override {
201 DirectiveKindMap[Directive.lower()] = DirectiveKindMap[Alias.lower()];
202 }
203
204 /// @name MCAsmParser Interface
205 /// {
206
207 SourceMgr &getSourceManager() override { return SrcMgr; }
208 MCAsmLexer &getLexer() override { return Lexer; }
209 MCContext &getContext() override { return Ctx; }
210 MCStreamer &getStreamer() override { return Out; }
211
212 CodeViewContext &getCVContext() { return Ctx.getCVContext(); }
213
214 unsigned getAssemblerDialect() override {
215 if (AssemblerDialect == ~0U)
216 return MAI.getAssemblerDialect();
217 else
218 return AssemblerDialect;
219 }
220 void setAssemblerDialect(unsigned i) override {
221 AssemblerDialect = i;
222 }
223
224 void Note(SMLoc L, const Twine &Msg, SMRange Range = None) override;
225 bool Warning(SMLoc L, const Twine &Msg, SMRange Range = None) override;
226 bool printError(SMLoc L, const Twine &Msg, SMRange Range = None) override;
227
228 const AsmToken &Lex() override;
229
230 void setParsingMSInlineAsm(bool V) override {
231 ParsingMSInlineAsm = V;
232 // When parsing MS inline asm, we must lex 0b1101 and 0ABCH as binary and
233 // hex integer literals.
234 Lexer.setLexMasmIntegers(V);
235 }
236 bool isParsingMSInlineAsm() override { return ParsingMSInlineAsm; }
237
238 bool parseMSInlineAsm(void *AsmLoc, std::string &AsmString,
239 unsigned &NumOutputs, unsigned &NumInputs,
240 SmallVectorImpl<std::pair<void *,bool>> &OpDecls,
241 SmallVectorImpl<std::string> &Constraints,
242 SmallVectorImpl<std::string> &Clobbers,
243 const MCInstrInfo *MII, const MCInstPrinter *IP,
244 MCAsmParserSemaCallback &SI) override;
245
246 bool parseExpression(const MCExpr *&Res);
247 bool parseExpression(const MCExpr *&Res, SMLoc &EndLoc) override;
248 bool parsePrimaryExpr(const MCExpr *&Res, SMLoc &EndLoc,
249 AsmTypeInfo *TypeInfo) override;
250 bool parseParenExpression(const MCExpr *&Res, SMLoc &EndLoc) override;
251 bool parseParenExprOfDepth(unsigned ParenDepth, const MCExpr *&Res,
252 SMLoc &EndLoc) override;
253 bool parseAbsoluteExpression(int64_t &Res) override;
254
255 /// Parse a floating point expression using the float \p Semantics
256 /// and set \p Res to the value.
257 bool parseRealValue(const fltSemantics &Semantics, APInt &Res);
258
259 /// Parse an identifier or string (as a quoted identifier)
260 /// and set \p Res to the identifier contents.
261 bool parseIdentifier(StringRef &Res) override;
262 void eatToEndOfStatement() override;
263
264 bool checkForValidSection() override;
265
266 /// }
267
268private:
269 bool parseStatement(ParseStatementInfo &Info,
270 MCAsmParserSemaCallback *SI);
271 bool parseCurlyBlockScope(SmallVectorImpl<AsmRewrite>& AsmStrRewrites);
272 bool parseCppHashLineFilenameComment(SMLoc L, bool SaveLocInfo = true);
273
274 void checkForBadMacro(SMLoc DirectiveLoc, StringRef Name, StringRef Body,
275 ArrayRef<MCAsmMacroParameter> Parameters);
276 bool expandMacro(raw_svector_ostream &OS, StringRef Body,
277 ArrayRef<MCAsmMacroParameter> Parameters,
278 ArrayRef<MCAsmMacroArgument> A, bool EnableAtPseudoVariable,
279 SMLoc L);
280
281 /// Are macros enabled in the parser?
282 bool areMacrosEnabled() {return MacrosEnabledFlag;}
283
284 /// Control a flag in the parser that enables or disables macros.
285 void setMacrosEnabled(bool Flag) {MacrosEnabledFlag = Flag;}
286
287 /// Are we inside a macro instantiation?
288 bool isInsideMacroInstantiation() {return !ActiveMacros.empty();}
289
290 /// Handle entry to macro instantiation.
291 ///
292 /// \param M The macro.
293 /// \param NameLoc Instantiation location.
294 bool handleMacroEntry(const MCAsmMacro *M, SMLoc NameLoc);
295
296 /// Handle exit from macro instantiation.
297 void handleMacroExit();
298
299 /// Extract AsmTokens for a macro argument.
300 bool parseMacroArgument(MCAsmMacroArgument &MA, bool Vararg);
301
302 /// Parse all macro arguments for a given macro.
303 bool parseMacroArguments(const MCAsmMacro *M, MCAsmMacroArguments &A);
304
305 void printMacroInstantiations();
306 void printMessage(SMLoc Loc, SourceMgr::DiagKind Kind, const Twine &Msg,
307 SMRange Range = None) const {
308 ArrayRef<SMRange> Ranges(Range);
309 SrcMgr.PrintMessage(Loc, Kind, Msg, Ranges);
310 }
311 static void DiagHandler(const SMDiagnostic &Diag, void *Context);
312
313 /// Should we emit DWARF describing this assembler source? (Returns false if
314 /// the source has .file directives, which means we don't want to generate
315 /// info describing the assembler source itself.)
316 bool enabledGenDwarfForAssembly();
317
318 /// Enter the specified file. This returns true on failure.
319 bool enterIncludeFile(const std::string &Filename);
320
321 /// Process the specified file for the .incbin directive.
322 /// This returns true on failure.
323 bool processIncbinFile(const std::string &Filename, int64_t Skip = 0,
324 const MCExpr *Count = nullptr, SMLoc Loc = SMLoc());
325
326 /// Reset the current lexer position to that given by \p Loc. The
327 /// current token is not set; clients should ensure Lex() is called
328 /// subsequently.
329 ///
330 /// \param InBuffer If not 0, should be the known buffer id that contains the
331 /// location.
332 void jumpToLoc(SMLoc Loc, unsigned InBuffer = 0);
333
334 /// Parse up to the end of statement and a return the contents from the
335 /// current token until the end of the statement; the current token on exit
336 /// will be either the EndOfStatement or EOF.
337 StringRef parseStringToEndOfStatement() override;
338
339 /// Parse until the end of a statement or a comma is encountered,
340 /// return the contents from the current token up to the end or comma.
341 StringRef parseStringToComma();
342
343 bool parseAssignment(StringRef Name, bool allow_redef,
344 bool NoDeadStrip = false);
345
346 unsigned getBinOpPrecedence(AsmToken::TokenKind K,
347 MCBinaryExpr::Opcode &Kind);
348
349 bool parseBinOpRHS(unsigned Precedence, const MCExpr *&Res, SMLoc &EndLoc);
350 bool parseParenExpr(const MCExpr *&Res, SMLoc &EndLoc);
351 bool parseBracketExpr(const MCExpr *&Res, SMLoc &EndLoc);
352
353 bool parseRegisterOrRegisterNumber(int64_t &Register, SMLoc DirectiveLoc);
354
355 bool parseCVFunctionId(int64_t &FunctionId, StringRef DirectiveName);
356 bool parseCVFileId(int64_t &FileId, StringRef DirectiveName);
357
358 // Generic (target and platform independent) directive parsing.
359 enum DirectiveKind {
360 DK_NO_DIRECTIVE, // Placeholder
361 DK_SET,
362 DK_EQU,
363 DK_EQUIV,
364 DK_ASCII,
365 DK_ASCIZ,
366 DK_STRING,
367 DK_BYTE,
368 DK_SHORT,
369 DK_RELOC,
370 DK_VALUE,
371 DK_2BYTE,
372 DK_LONG,
373 DK_INT,
374 DK_4BYTE,
375 DK_QUAD,
376 DK_8BYTE,
377 DK_OCTA,
378 DK_DC,
379 DK_DC_A,
380 DK_DC_B,
381 DK_DC_D,
382 DK_DC_L,
383 DK_DC_S,
384 DK_DC_W,
385 DK_DC_X,
386 DK_DCB,
387 DK_DCB_B,
388 DK_DCB_D,
389 DK_DCB_L,
390 DK_DCB_S,
391 DK_DCB_W,
392 DK_DCB_X,
393 DK_DS,
394 DK_DS_B,
395 DK_DS_D,
396 DK_DS_L,
397 DK_DS_P,
398 DK_DS_S,
399 DK_DS_W,
400 DK_DS_X,
401 DK_SINGLE,
402 DK_FLOAT,
403 DK_DOUBLE,
404 DK_ALIGN,
405 DK_ALIGN32,
406 DK_BALIGN,
407 DK_BALIGNW,
408 DK_BALIGNL,
409 DK_P2ALIGN,
410 DK_P2ALIGNW,
411 DK_P2ALIGNL,
412 DK_ORG,
413 DK_FILL,
414 DK_ENDR,
415 DK_BUNDLE_ALIGN_MODE,
416 DK_BUNDLE_LOCK,
417 DK_BUNDLE_UNLOCK,
418 DK_ZERO,
419 DK_EXTERN,
420 DK_GLOBL,
421 DK_GLOBAL,
422 DK_LAZY_REFERENCE,
423 DK_NO_DEAD_STRIP,
424 DK_SYMBOL_RESOLVER,
425 DK_PRIVATE_EXTERN,
426 DK_REFERENCE,
427 DK_WEAK_DEFINITION,
428 DK_WEAK_REFERENCE,
429 DK_WEAK_DEF_CAN_BE_HIDDEN,
430 DK_COLD,
431 DK_COMM,
432 DK_COMMON,
433 DK_LCOMM,
434 DK_ABORT,
435 DK_INCLUDE,
436 DK_INCBIN,
437 DK_CODE16,
438 DK_CODE16GCC,
439 DK_REPT,
440 DK_IRP,
441 DK_IRPC,
442 DK_IF,
443 DK_IFEQ,
444 DK_IFGE,
445 DK_IFGT,
446 DK_IFLE,
447 DK_IFLT,
448 DK_IFNE,
449 DK_IFB,
450 DK_IFNB,
451 DK_IFC,
452 DK_IFEQS,
453 DK_IFNC,
454 DK_IFNES,
455 DK_IFDEF,
456 DK_IFNDEF,
457 DK_IFNOTDEF,
458 DK_ELSEIF,
459 DK_ELSE,
460 DK_ENDIF,
461 DK_SPACE,
462 DK_SKIP,
463 DK_FILE,
464 DK_LINE,
465 DK_LOC,
466 DK_STABS,
467 DK_CV_FILE,
468 DK_CV_FUNC_ID,
469 DK_CV_INLINE_SITE_ID,
470 DK_CV_LOC,
471 DK_CV_LINETABLE,
472 DK_CV_INLINE_LINETABLE,
473 DK_CV_DEF_RANGE,
474 DK_CV_STRINGTABLE,
475 DK_CV_STRING,
476 DK_CV_FILECHECKSUMS,
477 DK_CV_FILECHECKSUM_OFFSET,
478 DK_CV_FPO_DATA,
479 DK_CFI_SECTIONS,
480 DK_CFI_STARTPROC,
481 DK_CFI_ENDPROC,
482 DK_CFI_DEF_CFA,
483 DK_CFI_DEF_CFA_OFFSET,
484 DK_CFI_ADJUST_CFA_OFFSET,
485 DK_CFI_DEF_CFA_REGISTER,
486 DK_CFI_OFFSET,
487 DK_CFI_REL_OFFSET,
488 DK_CFI_PERSONALITY,
489 DK_CFI_LSDA,
490 DK_CFI_REMEMBER_STATE,
491 DK_CFI_RESTORE_STATE,
492 DK_CFI_SAME_VALUE,
493 DK_CFI_RESTORE,
494 DK_CFI_ESCAPE,
495 DK_CFI_RETURN_COLUMN,
496 DK_CFI_SIGNAL_FRAME,
497 DK_CFI_UNDEFINED,
498 DK_CFI_REGISTER,
499 DK_CFI_WINDOW_SAVE,
500 DK_CFI_B_KEY_FRAME,
501 DK_MACROS_ON,
502 DK_MACROS_OFF,
503 DK_ALTMACRO,
504 DK_NOALTMACRO,
505 DK_MACRO,
506 DK_EXITM,
507 DK_ENDM,
508 DK_ENDMACRO,
509 DK_PURGEM,
510 DK_SLEB128,
511 DK_ULEB128,
512 DK_ERR,
513 DK_ERROR,
514 DK_WARNING,
515 DK_PRINT,
516 DK_ADDRSIG,
517 DK_ADDRSIG_SYM,
518 DK_PSEUDO_PROBE,
519 DK_END
520 };
521
522 /// Maps directive name --> DirectiveKind enum, for
523 /// directives parsed by this class.
524 StringMap<DirectiveKind> DirectiveKindMap;
525
526 // Codeview def_range type parsing.
527 enum CVDefRangeType {
528 CVDR_DEFRANGE = 0, // Placeholder
529 CVDR_DEFRANGE_REGISTER,
530 CVDR_DEFRANGE_FRAMEPOINTER_REL,
531 CVDR_DEFRANGE_SUBFIELD_REGISTER,
532 CVDR_DEFRANGE_REGISTER_REL
533 };
534
535 /// Maps Codeview def_range types --> CVDefRangeType enum, for
536 /// Codeview def_range types parsed by this class.
537 StringMap<CVDefRangeType> CVDefRangeTypeMap;
538
539 // ".ascii", ".asciz", ".string"
540 bool parseDirectiveAscii(StringRef IDVal, bool ZeroTerminated);
541 bool parseDirectiveReloc(SMLoc DirectiveLoc); // ".reloc"
542 bool parseDirectiveValue(StringRef IDVal,
543 unsigned Size); // ".byte", ".long", ...
544 bool parseDirectiveOctaValue(StringRef IDVal); // ".octa", ...
545 bool parseDirectiveRealValue(StringRef IDVal,
546 const fltSemantics &); // ".single", ...
547 bool parseDirectiveFill(); // ".fill"
548 bool parseDirectiveZero(); // ".zero"
549 // ".set", ".equ", ".equiv"
550 bool parseDirectiveSet(StringRef IDVal, bool allow_redef);
551 bool parseDirectiveOrg(); // ".org"
552 // ".align{,32}", ".p2align{,w,l}"
553 bool parseDirectiveAlign(bool IsPow2, unsigned ValueSize);
554
555 // ".file", ".line", ".loc", ".stabs"
556 bool parseDirectiveFile(SMLoc DirectiveLoc);
557 bool parseDirectiveLine();
558 bool parseDirectiveLoc();
559 bool parseDirectiveStabs();
560
561 // ".cv_file", ".cv_func_id", ".cv_inline_site_id", ".cv_loc", ".cv_linetable",
562 // ".cv_inline_linetable", ".cv_def_range", ".cv_string"
563 bool parseDirectiveCVFile();
564 bool parseDirectiveCVFuncId();
565 bool parseDirectiveCVInlineSiteId();
566 bool parseDirectiveCVLoc();
567 bool parseDirectiveCVLinetable();
568 bool parseDirectiveCVInlineLinetable();
569 bool parseDirectiveCVDefRange();
570 bool parseDirectiveCVString();
571 bool parseDirectiveCVStringTable();
572 bool parseDirectiveCVFileChecksums();
573 bool parseDirectiveCVFileChecksumOffset();
574 bool parseDirectiveCVFPOData();
575
576 // .cfi directives
577 bool parseDirectiveCFIRegister(SMLoc DirectiveLoc);
578 bool parseDirectiveCFIWindowSave();
579 bool parseDirectiveCFISections();
580 bool parseDirectiveCFIStartProc();
581 bool parseDirectiveCFIEndProc();
582 bool parseDirectiveCFIDefCfaOffset();
583 bool parseDirectiveCFIDefCfa(SMLoc DirectiveLoc);
584 bool parseDirectiveCFIAdjustCfaOffset();
585 bool parseDirectiveCFIDefCfaRegister(SMLoc DirectiveLoc);
586 bool parseDirectiveCFIOffset(SMLoc DirectiveLoc);
587 bool parseDirectiveCFIRelOffset(SMLoc DirectiveLoc);
588 bool parseDirectiveCFIPersonalityOrLsda(bool IsPersonality);
589 bool parseDirectiveCFIRememberState();
590 bool parseDirectiveCFIRestoreState();
591 bool parseDirectiveCFISameValue(SMLoc DirectiveLoc);
592 bool parseDirectiveCFIRestore(SMLoc DirectiveLoc);
593 bool parseDirectiveCFIEscape();
594 bool parseDirectiveCFIReturnColumn(SMLoc DirectiveLoc);
595 bool parseDirectiveCFISignalFrame();
596 bool parseDirectiveCFIUndefined(SMLoc DirectiveLoc);
597
598 // macro directives
599 bool parseDirectivePurgeMacro(SMLoc DirectiveLoc);
600 bool parseDirectiveExitMacro(StringRef Directive);
601 bool parseDirectiveEndMacro(StringRef Directive);
602 bool parseDirectiveMacro(SMLoc DirectiveLoc);
603 bool parseDirectiveMacrosOnOff(StringRef Directive);
604 // alternate macro mode directives
605 bool parseDirectiveAltmacro(StringRef Directive);
606 // ".bundle_align_mode"
607 bool parseDirectiveBundleAlignMode();
608 // ".bundle_lock"
609 bool parseDirectiveBundleLock();
610 // ".bundle_unlock"
611 bool parseDirectiveBundleUnlock();
612
613 // ".space", ".skip"
614 bool parseDirectiveSpace(StringRef IDVal);
615
616 // ".dcb"
617 bool parseDirectiveDCB(StringRef IDVal, unsigned Size);
618 bool parseDirectiveRealDCB(StringRef IDVal, const fltSemantics &);
619 // ".ds"
620 bool parseDirectiveDS(StringRef IDVal, unsigned Size);
621
622 // .sleb128 (Signed=true) and .uleb128 (Signed=false)
623 bool parseDirectiveLEB128(bool Signed);
624
625 /// Parse a directive like ".globl" which
626 /// accepts a single symbol (which should be a label or an external).
627 bool parseDirectiveSymbolAttribute(MCSymbolAttr Attr);
628
629 bool parseDirectiveComm(bool IsLocal); // ".comm" and ".lcomm"
630
631 bool parseDirectiveAbort(); // ".abort"
632 bool parseDirectiveInclude(); // ".include"
633 bool parseDirectiveIncbin(); // ".incbin"
634
635 // ".if", ".ifeq", ".ifge", ".ifgt" , ".ifle", ".iflt" or ".ifne"
636 bool parseDirectiveIf(SMLoc DirectiveLoc, DirectiveKind DirKind);
637 // ".ifb" or ".ifnb", depending on ExpectBlank.
638 bool parseDirectiveIfb(SMLoc DirectiveLoc, bool ExpectBlank);
639 // ".ifc" or ".ifnc", depending on ExpectEqual.
640 bool parseDirectiveIfc(SMLoc DirectiveLoc, bool ExpectEqual);
641 // ".ifeqs" or ".ifnes", depending on ExpectEqual.
642 bool parseDirectiveIfeqs(SMLoc DirectiveLoc, bool ExpectEqual);
643 // ".ifdef" or ".ifndef", depending on expect_defined
644 bool parseDirectiveIfdef(SMLoc DirectiveLoc, bool expect_defined);
645 bool parseDirectiveElseIf(SMLoc DirectiveLoc); // ".elseif"
646 bool parseDirectiveElse(SMLoc DirectiveLoc); // ".else"
647 bool parseDirectiveEndIf(SMLoc DirectiveLoc); // .endif
648 bool parseEscapedString(std::string &Data) override;
649 bool parseAngleBracketString(std::string &Data) override;
650
651 const MCExpr *applyModifierToExpr(const MCExpr *E,
652 MCSymbolRefExpr::VariantKind Variant);
653
654 // Macro-like directives
655 MCAsmMacro *parseMacroLikeBody(SMLoc DirectiveLoc);
656 void instantiateMacroLikeBody(MCAsmMacro *M, SMLoc DirectiveLoc,
657 raw_svector_ostream &OS);
658 bool parseDirectiveRept(SMLoc DirectiveLoc, StringRef Directive);
659 bool parseDirectiveIrp(SMLoc DirectiveLoc); // ".irp"
660 bool parseDirectiveIrpc(SMLoc DirectiveLoc); // ".irpc"
661 bool parseDirectiveEndr(SMLoc DirectiveLoc); // ".endr"
662
663 // "_emit" or "__emit"
664 bool parseDirectiveMSEmit(SMLoc DirectiveLoc, ParseStatementInfo &Info,
665 size_t Len);
666
667 // "align"
668 bool parseDirectiveMSAlign(SMLoc DirectiveLoc, ParseStatementInfo &Info);
669
670 // "end"
671 bool parseDirectiveEnd(SMLoc DirectiveLoc);
672
673 // ".err" or ".error"
674 bool parseDirectiveError(SMLoc DirectiveLoc, bool WithMessage);
675
676 // ".warning"
677 bool parseDirectiveWarning(SMLoc DirectiveLoc);
678
679 // .print <double-quotes-string>
680 bool parseDirectivePrint(SMLoc DirectiveLoc);
681
682 // .pseudoprobe
683 bool parseDirectivePseudoProbe();
684
685 // Directives to support address-significance tables.
686 bool parseDirectiveAddrsig();
687 bool parseDirectiveAddrsigSym();
688
689 void initializeDirectiveKindMap();
690 void initializeCVDefRangeTypeMap();
691};
692
693} // end anonymous namespace
694
695namespace llvm {
696
697extern MCAsmParserExtension *createDarwinAsmParser();
698extern MCAsmParserExtension *createELFAsmParser();
699extern MCAsmParserExtension *createCOFFAsmParser();
700extern MCAsmParserExtension *createWasmAsmParser();
701
702} // end namespace llvm
703
704enum { DEFAULT_ADDRSPACE = 0 };
705
706AsmParser::AsmParser(SourceMgr &SM, MCContext &Ctx, MCStreamer &Out,
707 const MCAsmInfo &MAI, unsigned CB = 0)
708 : Lexer(MAI), Ctx(Ctx), Out(Out), MAI(MAI), SrcMgr(SM),
709 CurBuffer(CB ? CB : SM.getMainFileID()), MacrosEnabledFlag(true) {
710 HadError = false;
711 // Save the old handler.
712 SavedDiagHandler = SrcMgr.getDiagHandler();
713 SavedDiagContext = SrcMgr.getDiagContext();
714 // Set our own handler which calls the saved handler.
715 SrcMgr.setDiagHandler(DiagHandler, this);
716 Lexer.setBuffer(SrcMgr.getMemoryBuffer(CurBuffer)->getBuffer());
717 // Make MCStreamer aware of the StartTokLoc for locations in diagnostics.
718 Out.setStartTokLocPtr(&StartTokLoc);
719
720 // Initialize the platform / file format parser.
721 switch (Ctx.getObjectFileInfo()->getObjectFileType()) {
722 case MCObjectFileInfo::IsCOFF:
723 PlatformParser.reset(createCOFFAsmParser());
724 break;
725 case MCObjectFileInfo::IsMachO:
726 PlatformParser.reset(createDarwinAsmParser());
727 IsDarwin = true;
728 break;
729 case MCObjectFileInfo::IsELF:
730 PlatformParser.reset(createELFAsmParser());
731 break;
732 case MCObjectFileInfo::IsWasm:
733 PlatformParser.reset(createWasmAsmParser());
734 break;
735 case MCObjectFileInfo::IsXCOFF:
736 report_fatal_error(
737 "Need to implement createXCOFFAsmParser for XCOFF format.");
738 break;
739 }
740
741 PlatformParser->Initialize(*this);
742 initializeDirectiveKindMap();
743 initializeCVDefRangeTypeMap();
744
745 NumOfMacroInstantiations = 0;
746}
747
748AsmParser::~AsmParser() {
749 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~++20210306111116+7ae191f59f0f/llvm/lib/MC/MCParser/AsmParser.cpp"
, 750, __PRETTY_FUNCTION__))
750 "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~++20210306111116+7ae191f59f0f/llvm/lib/MC/MCParser/AsmParser.cpp"
, 750, __PRETTY_FUNCTION__))
;
751
752 // Remove MCStreamer's reference to the parser SMLoc.
753 Out.setStartTokLocPtr(nullptr);
754 // Restore the saved diagnostics handler and context for use during
755 // finalization.
756 SrcMgr.setDiagHandler(SavedDiagHandler, SavedDiagContext);
757}
758
759void AsmParser::printMacroInstantiations() {
760 // Print the active macro instantiation stack.
761 for (std::vector<MacroInstantiation *>::const_reverse_iterator
762 it = ActiveMacros.rbegin(),
763 ie = ActiveMacros.rend();
764 it != ie; ++it)
765 printMessage((*it)->InstantiationLoc, SourceMgr::DK_Note,
766 "while in macro instantiation");
767}
768
769void AsmParser::Note(SMLoc L, const Twine &Msg, SMRange Range) {
770 printPendingErrors();
771 printMessage(L, SourceMgr::DK_Note, Msg, Range);
772 printMacroInstantiations();
773}
774
775bool AsmParser::Warning(SMLoc L, const Twine &Msg, SMRange Range) {
776 if(getTargetParser().getTargetOptions().MCNoWarn)
777 return false;
778 if (getTargetParser().getTargetOptions().MCFatalWarnings)
779 return Error(L, Msg, Range);
780 printMessage(L, SourceMgr::DK_Warning, Msg, Range);
781 printMacroInstantiations();
782 return false;
783}
784
785bool AsmParser::printError(SMLoc L, const Twine &Msg, SMRange Range) {
786 HadError = true;
787 printMessage(L, SourceMgr::DK_Error, Msg, Range);
788 printMacroInstantiations();
789 return true;
790}
791
792bool AsmParser::enterIncludeFile(const std::string &Filename) {
793 std::string IncludedFile;
794 unsigned NewBuf =
795 SrcMgr.AddIncludeFile(Filename, Lexer.getLoc(), IncludedFile);
796 if (!NewBuf)
797 return true;
798
799 CurBuffer = NewBuf;
800 Lexer.setBuffer(SrcMgr.getMemoryBuffer(CurBuffer)->getBuffer());
801 return false;
802}
803
804/// Process the specified .incbin file by searching for it in the include paths
805/// then just emitting the byte contents of the file to the streamer. This
806/// returns true on failure.
807bool AsmParser::processIncbinFile(const std::string &Filename, int64_t Skip,
808 const MCExpr *Count, SMLoc Loc) {
809 std::string IncludedFile;
810 unsigned NewBuf =
811 SrcMgr.AddIncludeFile(Filename, Lexer.getLoc(), IncludedFile);
812 if (!NewBuf)
813 return true;
814
815 // Pick up the bytes from the file and emit them.
816 StringRef Bytes = SrcMgr.getMemoryBuffer(NewBuf)->getBuffer();
817 Bytes = Bytes.drop_front(Skip);
818 if (Count) {
819 int64_t Res;
820 if (!Count->evaluateAsAbsolute(Res, getStreamer().getAssemblerPtr()))
821 return Error(Loc, "expected absolute expression");
822 if (Res < 0)
823 return Warning(Loc, "negative count has no effect");
824 Bytes = Bytes.take_front(Res);
825 }
826 getStreamer().emitBytes(Bytes);
827 return false;
828}
829
830void AsmParser::jumpToLoc(SMLoc Loc, unsigned InBuffer) {
831 CurBuffer = InBuffer ? InBuffer : SrcMgr.FindBufferContainingLoc(Loc);
832 Lexer.setBuffer(SrcMgr.getMemoryBuffer(CurBuffer)->getBuffer(),
833 Loc.getPointer());
834}
835
836const AsmToken &AsmParser::Lex() {
837 if (Lexer.getTok().is(AsmToken::Error))
838 Error(Lexer.getErrLoc(), Lexer.getErr());
839
840 // if it's a end of statement with a comment in it
841 if (getTok().is(AsmToken::EndOfStatement)) {
842 // if this is a line comment output it.
843 if (!getTok().getString().empty() && getTok().getString().front() != '\n' &&
844 getTok().getString().front() != '\r' && MAI.preserveAsmComments())
845 Out.addExplicitComment(Twine(getTok().getString()));
846 }
847
848 const AsmToken *tok = &Lexer.Lex();
849
850 // Parse comments here to be deferred until end of next statement.
851 while (tok->is(AsmToken::Comment)) {
852 if (MAI.preserveAsmComments())
853 Out.addExplicitComment(Twine(tok->getString()));
854 tok = &Lexer.Lex();
855 }
856
857 if (tok->is(AsmToken::Eof)) {
858 // If this is the end of an included file, pop the parent file off the
859 // include stack.
860 SMLoc ParentIncludeLoc = SrcMgr.getParentIncludeLoc(CurBuffer);
861 if (ParentIncludeLoc != SMLoc()) {
862 jumpToLoc(ParentIncludeLoc);
863 return Lex();
864 }
865 }
866
867 return *tok;
868}
869
870bool AsmParser::enabledGenDwarfForAssembly() {
871 // Check whether the user specified -g.
872 if (!getContext().getGenDwarfForAssembly())
873 return false;
874 // If we haven't encountered any .file directives (which would imply that
875 // the assembler source was produced with debug info already) then emit one
876 // describing the assembler source file itself.
877 if (getContext().getGenDwarfFileNumber() == 0) {
878 // Use the first #line directive for this, if any. It's preprocessed, so
879 // there is no checksum, and of course no source directive.
880 if (!FirstCppHashFilename.empty())
881 getContext().setMCLineTableRootFile(/*CUID=*/0,
882 getContext().getCompilationDir(),
883 FirstCppHashFilename,
884 /*Cksum=*/None, /*Source=*/None);
885 const MCDwarfFile &RootFile =
886 getContext().getMCDwarfLineTable(/*CUID=*/0).getRootFile();
887 getContext().setGenDwarfFileNumber(getStreamer().emitDwarfFileDirective(
888 /*CUID=*/0, getContext().getCompilationDir(), RootFile.Name,
889 RootFile.Checksum, RootFile.Source));
890 }
891 return true;
892}
893
894bool AsmParser::Run(bool NoInitialTextSection, bool NoFinalize) {
895 // Create the initial section, if requested.
896 if (!NoInitialTextSection)
897 Out.InitSections(false);
898
899 // Prime the lexer.
900 Lex();
901
902 HadError = false;
903 AsmCond StartingCondState = TheCondState;
904 SmallVector<AsmRewrite, 4> AsmStrRewrites;
905
906 // If we are generating dwarf for assembly source files save the initial text
907 // section. (Don't use enabledGenDwarfForAssembly() here, as we aren't
908 // emitting any actual debug info yet and haven't had a chance to parse any
909 // embedded .file directives.)
910 if (getContext().getGenDwarfForAssembly()) {
911 MCSection *Sec = getStreamer().getCurrentSectionOnly();
912 if (!Sec->getBeginSymbol()) {
913 MCSymbol *SectionStartSym = getContext().createTempSymbol();
914 getStreamer().emitLabel(SectionStartSym);
915 Sec->setBeginSymbol(SectionStartSym);
916 }
917 bool InsertResult = getContext().addGenDwarfSection(Sec);
918 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~++20210306111116+7ae191f59f0f/llvm/lib/MC/MCParser/AsmParser.cpp"
, 918, __PRETTY_FUNCTION__))
;
919 (void)InsertResult;
920 }
921
922 // While we have input, parse each statement.
923 while (Lexer.isNot(AsmToken::Eof)) {
924 ParseStatementInfo Info(&AsmStrRewrites);
925 bool Parsed = parseStatement(Info, nullptr);
926
927 // If we have a Lexer Error we are on an Error Token. Load in Lexer Error
928 // for printing ErrMsg via Lex() only if no (presumably better) parser error
929 // exists.
930 if (Parsed && !hasPendingError() && Lexer.getTok().is(AsmToken::Error)) {
931 Lex();
932 }
933
934 // parseStatement returned true so may need to emit an error.
935 printPendingErrors();
936
937 // Skipping to the next line if needed.
938 if (Parsed && !getLexer().isAtStartOfStatement())
939 eatToEndOfStatement();
940 }
941
942 getTargetParser().onEndOfFile();
943 printPendingErrors();
944
945 // All errors should have been emitted.
946 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~++20210306111116+7ae191f59f0f/llvm/lib/MC/MCParser/AsmParser.cpp"
, 946, __PRETTY_FUNCTION__))
;
947
948 getTargetParser().flushPendingInstructions(getStreamer());
949
950 if (TheCondState.TheCond != StartingCondState.TheCond ||
951 TheCondState.Ignore != StartingCondState.Ignore)
952 printError(getTok().getLoc(), "unmatched .ifs or .elses");
953 // Check to see there are no empty DwarfFile slots.
954 const auto &LineTables = getContext().getMCDwarfLineTables();
955 if (!LineTables.empty()) {
956 unsigned Index = 0;
957 for (const auto &File : LineTables.begin()->second.getMCDwarfFiles()) {
958 if (File.Name.empty() && Index != 0)
959 printError(getTok().getLoc(), "unassigned file number: " +
960 Twine(Index) +
961 " for .file directives");
962 ++Index;
963 }
964 }
965
966 // Check to see that all assembler local symbols were actually defined.
967 // Targets that don't do subsections via symbols may not want this, though,
968 // so conservatively exclude them. Only do this if we're finalizing, though,
969 // as otherwise we won't necessarilly have seen everything yet.
970 if (!NoFinalize) {
971 if (MAI.hasSubsectionsViaSymbols()) {
972 for (const auto &TableEntry : getContext().getSymbols()) {
973 MCSymbol *Sym = TableEntry.getValue();
974 // Variable symbols may not be marked as defined, so check those
975 // explicitly. If we know it's a variable, we have a definition for
976 // the purposes of this check.
977 if (Sym->isTemporary() && !Sym->isVariable() && !Sym->isDefined())
978 // FIXME: We would really like to refer back to where the symbol was
979 // first referenced for a source location. We need to add something
980 // to track that. Currently, we just point to the end of the file.
981 printError(getTok().getLoc(), "assembler local symbol '" +
982 Sym->getName() + "' not defined");
983 }
984 }
985
986 // Temporary symbols like the ones for directional jumps don't go in the
987 // symbol table. They also need to be diagnosed in all (final) cases.
988 for (std::tuple<SMLoc, CppHashInfoTy, MCSymbol *> &LocSym : DirLabels) {
989 if (std::get<2>(LocSym)->isUndefined()) {
990 // Reset the state of any "# line file" directives we've seen to the
991 // context as it was at the diagnostic site.
992 CppHashInfo = std::get<1>(LocSym);
993 printError(std::get<0>(LocSym), "directional label undefined");
994 }
995 }
996 }
997
998 // Finalize the output stream if there are no errors and if the client wants
999 // us to.
1000 if (!HadError && !NoFinalize)
1001 Out.Finish(Lexer.getLoc());
1002
1003 return HadError || getContext().hadError();
1004}
1005
1006bool AsmParser::checkForValidSection() {
1007 if (!ParsingMSInlineAsm && !getStreamer().getCurrentSectionOnly()) {
1008 Out.InitSections(false);
1009 return Error(getTok().getLoc(),
1010 "expected section directive before assembly directive");
1011 }
1012 return false;
1013}
1014
1015/// Throw away the rest of the line for testing purposes.
1016void AsmParser::eatToEndOfStatement() {
1017 while (Lexer.isNot(AsmToken::EndOfStatement) && Lexer.isNot(AsmToken::Eof))
1018 Lexer.Lex();
1019
1020 // Eat EOL.
1021 if (Lexer.is(AsmToken::EndOfStatement))
1022 Lexer.Lex();
1023}
1024
1025StringRef AsmParser::parseStringToEndOfStatement() {
1026 const char *Start = getTok().getLoc().getPointer();
1027
1028 while (Lexer.isNot(AsmToken::EndOfStatement) && Lexer.isNot(AsmToken::Eof))
1029 Lexer.Lex();
1030
1031 const char *End = getTok().getLoc().getPointer();
1032 return StringRef(Start, End - Start);
1033}
1034
1035StringRef AsmParser::parseStringToComma() {
1036 const char *Start = getTok().getLoc().getPointer();
1037
1038 while (Lexer.isNot(AsmToken::EndOfStatement) &&
1039 Lexer.isNot(AsmToken::Comma) && Lexer.isNot(AsmToken::Eof))
1040 Lexer.Lex();
1041
1042 const char *End = getTok().getLoc().getPointer();
1043 return StringRef(Start, End - Start);
1044}
1045
1046/// Parse a paren expression and return it.
1047/// NOTE: This assumes the leading '(' has already been consumed.
1048///
1049/// parenexpr ::= expr)
1050///
1051bool AsmParser::parseParenExpr(const MCExpr *&Res, SMLoc &EndLoc) {
1052 if (parseExpression(Res))
1053 return true;
1054 if (Lexer.isNot(AsmToken::RParen))
1055 return TokError("expected ')' in parentheses expression");
1056 EndLoc = Lexer.getTok().getEndLoc();
1057 Lex();
1058 return false;
1059}
1060
1061/// Parse a bracket expression and return it.
1062/// NOTE: This assumes the leading '[' has already been consumed.
1063///
1064/// bracketexpr ::= expr]
1065///
1066bool AsmParser::parseBracketExpr(const MCExpr *&Res, SMLoc &EndLoc) {
1067 if (parseExpression(Res))
1068 return true;
1069 EndLoc = getTok().getEndLoc();
1070 if (parseToken(AsmToken::RBrac, "expected ']' in brackets expression"))
1071 return true;
1072 return false;
1073}
1074
1075/// Parse a primary expression and return it.
1076/// primaryexpr ::= (parenexpr
1077/// primaryexpr ::= symbol
1078/// primaryexpr ::= number
1079/// primaryexpr ::= '.'
1080/// primaryexpr ::= ~,+,- primaryexpr
1081bool AsmParser::parsePrimaryExpr(const MCExpr *&Res, SMLoc &EndLoc,
1082 AsmTypeInfo *TypeInfo) {
1083 SMLoc FirstTokenLoc = getLexer().getLoc();
1084 AsmToken::TokenKind FirstTokenKind = Lexer.getKind();
1085 switch (FirstTokenKind) {
1086 default:
1087 return TokError("unknown token in expression");
1088 // If we have an error assume that we've already handled it.
1089 case AsmToken::Error:
1090 return true;
1091 case AsmToken::Exclaim:
1092 Lex(); // Eat the operator.
1093 if (parsePrimaryExpr(Res, EndLoc, TypeInfo))
1094 return true;
1095 Res = MCUnaryExpr::createLNot(Res, getContext(), FirstTokenLoc);
1096 return false;
1097 case AsmToken::Dollar:
1098 case AsmToken::At:
1099 case AsmToken::String:
1100 case AsmToken::Identifier: {
1101 StringRef Identifier;
1102 if (parseIdentifier(Identifier)) {
1103 // We may have failed but $ may be a valid token.
1104 if (getTok().is(AsmToken::Dollar)) {
1105 if (Lexer.getMAI().getDollarIsPC()) {
1106 Lex();
1107 // This is a '$' reference, which references the current PC. Emit a
1108 // temporary label to the streamer and refer to it.
1109 MCSymbol *Sym = Ctx.createTempSymbol();
1110 Out.emitLabel(Sym);
1111 Res = MCSymbolRefExpr::create(Sym, MCSymbolRefExpr::VK_None,
1112 getContext());
1113 EndLoc = FirstTokenLoc;
1114 return false;
1115 }
1116 return Error(FirstTokenLoc, "invalid token in expression");
1117 }
1118 }
1119 // Parse symbol variant
1120 std::pair<StringRef, StringRef> Split;
1121 if (!MAI.useParensForSymbolVariant()) {
1122 if (FirstTokenKind == AsmToken::String) {
1123 if (Lexer.is(AsmToken::At)) {
1124 Lex(); // eat @
1125 SMLoc AtLoc = getLexer().getLoc();
1126 StringRef VName;
1127 if (parseIdentifier(VName))
1128 return Error(AtLoc, "expected symbol variant after '@'");
1129
1130 Split = std::make_pair(Identifier, VName);
1131 }
1132 } else {
1133 Split = Identifier.split('@');
1134 }
1135 } else if (Lexer.is(AsmToken::LParen)) {
1136 Lex(); // eat '('.
1137 StringRef VName;
1138 parseIdentifier(VName);
1139 // eat ')'.
1140 if (parseToken(AsmToken::RParen,
1141 "unexpected token in variant, expected ')'"))
1142 return true;
1143 Split = std::make_pair(Identifier, VName);
1144 }
1145
1146 EndLoc = SMLoc::getFromPointer(Identifier.end());
1147
1148 // This is a symbol reference.
1149 StringRef SymbolName = Identifier;
1150 if (SymbolName.empty())
1151 return Error(getLexer().getLoc(), "expected a symbol reference");
1152
1153 MCSymbolRefExpr::VariantKind Variant = MCSymbolRefExpr::VK_None;
1154
1155 // Lookup the symbol variant if used.
1156 if (!Split.second.empty()) {
1157 Variant = MCSymbolRefExpr::getVariantKindForName(Split.second);
1158 if (Variant != MCSymbolRefExpr::VK_Invalid) {
1159 SymbolName = Split.first;
1160 } else if (MAI.doesAllowAtInName() && !MAI.useParensForSymbolVariant()) {
1161 Variant = MCSymbolRefExpr::VK_None;
1162 } else {
1163 return Error(SMLoc::getFromPointer(Split.second.begin()),
1164 "invalid variant '" + Split.second + "'");
1165 }
1166 }
1167
1168 MCSymbol *Sym = getContext().getInlineAsmLabel(SymbolName);
1169 if (!Sym)
1170 Sym = getContext().getOrCreateSymbol(SymbolName);
1171
1172 // If this is an absolute variable reference, substitute it now to preserve
1173 // semantics in the face of reassignment.
1174 if (Sym->isVariable()) {
1175 auto V = Sym->getVariableValue(/*SetUsed*/ false);
1176 bool DoInline = isa<MCConstantExpr>(V) && !Variant;
1177 if (auto TV = dyn_cast<MCTargetExpr>(V))
1178 DoInline = TV->inlineAssignedExpr();
1179 if (DoInline) {
1180 if (Variant)
1181 return Error(EndLoc, "unexpected modifier on variable reference");
1182 Res = Sym->getVariableValue(/*SetUsed*/ false);
1183 return false;
1184 }
1185 }
1186
1187 // Otherwise create a symbol ref.
1188 Res = MCSymbolRefExpr::create(Sym, Variant, getContext(), FirstTokenLoc);
1189 return false;
1190 }
1191 case AsmToken::BigNum:
1192 return TokError("literal value out of range for directive");
1193 case AsmToken::Integer: {
1194 SMLoc Loc = getTok().getLoc();
1195 int64_t IntVal = getTok().getIntVal();
1196 Res = MCConstantExpr::create(IntVal, getContext());
1197 EndLoc = Lexer.getTok().getEndLoc();
1198 Lex(); // Eat token.
1199 // Look for 'b' or 'f' following an Integer as a directional label
1200 if (Lexer.getKind() == AsmToken::Identifier) {
1201 StringRef IDVal = getTok().getString();
1202 // Lookup the symbol variant if used.
1203 std::pair<StringRef, StringRef> Split = IDVal.split('@');
1204 MCSymbolRefExpr::VariantKind Variant = MCSymbolRefExpr::VK_None;
1205 if (Split.first.size() != IDVal.size()) {
1206 Variant = MCSymbolRefExpr::getVariantKindForName(Split.second);
1207 if (Variant == MCSymbolRefExpr::VK_Invalid)
1208 return TokError("invalid variant '" + Split.second + "'");
1209 IDVal = Split.first;
1210 }
1211 if (IDVal == "f" || IDVal == "b") {
1212 MCSymbol *Sym =
1213 Ctx.getDirectionalLocalSymbol(IntVal, IDVal == "b");
1214 Res = MCSymbolRefExpr::create(Sym, Variant, getContext());
1215 if (IDVal == "b" && Sym->isUndefined())
1216 return Error(Loc, "directional label undefined");
1217 DirLabels.push_back(std::make_tuple(Loc, CppHashInfo, Sym));
1218 EndLoc = Lexer.getTok().getEndLoc();
1219 Lex(); // Eat identifier.
1220 }
1221 }
1222 return false;
1223 }
1224 case AsmToken::Real: {
1225 APFloat RealVal(APFloat::IEEEdouble(), getTok().getString());
1226 uint64_t IntVal = RealVal.bitcastToAPInt().getZExtValue();
1227 Res = MCConstantExpr::create(IntVal, getContext());
1228 EndLoc = Lexer.getTok().getEndLoc();
1229 Lex(); // Eat token.
1230 return false;
1231 }
1232 case AsmToken::Dot: {
1233 // This is a '.' reference, which references the current PC. Emit a
1234 // temporary label to the streamer and refer to it.
1235 MCSymbol *Sym = Ctx.createTempSymbol();
1236 Out.emitLabel(Sym);
1237 Res = MCSymbolRefExpr::create(Sym, MCSymbolRefExpr::VK_None, getContext());
1238 EndLoc = Lexer.getTok().getEndLoc();
1239 Lex(); // Eat identifier.
1240 return false;
1241 }
1242 case AsmToken::LParen:
1243 Lex(); // Eat the '('.
1244 return parseParenExpr(Res, EndLoc);
1245 case AsmToken::LBrac:
1246 if (!PlatformParser->HasBracketExpressions())
1247 return TokError("brackets expression not supported on this target");
1248 Lex(); // Eat the '['.
1249 return parseBracketExpr(Res, EndLoc);
1250 case AsmToken::Minus:
1251 Lex(); // Eat the operator.
1252 if (parsePrimaryExpr(Res, EndLoc, TypeInfo))
1253 return true;
1254 Res = MCUnaryExpr::createMinus(Res, getContext(), FirstTokenLoc);
1255 return false;
1256 case AsmToken::Plus:
1257 Lex(); // Eat the operator.
1258 if (parsePrimaryExpr(Res, EndLoc, TypeInfo))
1259 return true;
1260 Res = MCUnaryExpr::createPlus(Res, getContext(), FirstTokenLoc);
1261 return false;
1262 case AsmToken::Tilde:
1263 Lex(); // Eat the operator.
1264 if (parsePrimaryExpr(Res, EndLoc, TypeInfo))
1265 return true;
1266 Res = MCUnaryExpr::createNot(Res, getContext(), FirstTokenLoc);
1267 return false;
1268 // MIPS unary expression operators. The lexer won't generate these tokens if
1269 // MCAsmInfo::HasMipsExpressions is false for the target.
1270 case AsmToken::PercentCall16:
1271 case AsmToken::PercentCall_Hi:
1272 case AsmToken::PercentCall_Lo:
1273 case AsmToken::PercentDtprel_Hi:
1274 case AsmToken::PercentDtprel_Lo:
1275 case AsmToken::PercentGot:
1276 case AsmToken::PercentGot_Disp:
1277 case AsmToken::PercentGot_Hi:
1278 case AsmToken::PercentGot_Lo:
1279 case AsmToken::PercentGot_Ofst:
1280 case AsmToken::PercentGot_Page:
1281 case AsmToken::PercentGottprel:
1282 case AsmToken::PercentGp_Rel:
1283 case AsmToken::PercentHi:
1284 case AsmToken::PercentHigher:
1285 case AsmToken::PercentHighest:
1286 case AsmToken::PercentLo:
1287 case AsmToken::PercentNeg:
1288 case AsmToken::PercentPcrel_Hi:
1289 case AsmToken::PercentPcrel_Lo:
1290 case AsmToken::PercentTlsgd:
1291 case AsmToken::PercentTlsldm:
1292 case AsmToken::PercentTprel_Hi:
1293 case AsmToken::PercentTprel_Lo:
1294 Lex(); // Eat the operator.
1295 if (Lexer.isNot(AsmToken::LParen))
1296 return TokError("expected '(' after operator");
1297 Lex(); // Eat the operator.
1298 if (parseExpression(Res, EndLoc))
1299 return true;
1300 if (Lexer.isNot(AsmToken::RParen))
1301 return TokError("expected ')'");
1302 Lex(); // Eat the operator.
1303 Res = getTargetParser().createTargetUnaryExpr(Res, FirstTokenKind, Ctx);
1304 return !Res;
1305 }
1306}
1307
1308bool AsmParser::parseExpression(const MCExpr *&Res) {
1309 SMLoc EndLoc;
1310 return parseExpression(Res, EndLoc);
1311}
1312
1313const MCExpr *
1314AsmParser::applyModifierToExpr(const MCExpr *E,
1315 MCSymbolRefExpr::VariantKind Variant) {
1316 // Ask the target implementation about this expression first.
1317 const MCExpr *NewE = getTargetParser().applyModifierToExpr(E, Variant, Ctx);
1318 if (NewE)
1319 return NewE;
1320 // Recurse over the given expression, rebuilding it to apply the given variant
1321 // if there is exactly one symbol.
1322 switch (E->getKind()) {
1323 case MCExpr::Target:
1324 case MCExpr::Constant:
1325 return nullptr;
1326
1327 case MCExpr::SymbolRef: {
1328 const MCSymbolRefExpr *SRE = cast<MCSymbolRefExpr>(E);
1329
1330 if (SRE->getKind() != MCSymbolRefExpr::VK_None) {
1331 TokError("invalid variant on expression '" + getTok().getIdentifier() +
1332 "' (already modified)");
1333 return E;
1334 }
1335
1336 return MCSymbolRefExpr::create(&SRE->getSymbol(), Variant, getContext());
1337 }
1338
1339 case MCExpr::Unary: {
1340 const MCUnaryExpr *UE = cast<MCUnaryExpr>(E);
1341 const MCExpr *Sub = applyModifierToExpr(UE->getSubExpr(), Variant);
1342 if (!Sub)
1343 return nullptr;
1344 return MCUnaryExpr::create(UE->getOpcode(), Sub, getContext());
1345 }
1346
1347 case MCExpr::Binary: {
1348 const MCBinaryExpr *BE = cast<MCBinaryExpr>(E);
1349 const MCExpr *LHS = applyModifierToExpr(BE->getLHS(), Variant);
1350 const MCExpr *RHS = applyModifierToExpr(BE->getRHS(), Variant);
1351
1352 if (!LHS && !RHS)
1353 return nullptr;
1354
1355 if (!LHS)
1356 LHS = BE->getLHS();
1357 if (!RHS)
1358 RHS = BE->getRHS();
1359
1360 return MCBinaryExpr::create(BE->getOpcode(), LHS, RHS, getContext());
1361 }
1362 }
1363
1364 llvm_unreachable("Invalid expression kind!")::llvm::llvm_unreachable_internal("Invalid expression kind!",
"/build/llvm-toolchain-snapshot-13~++20210306111116+7ae191f59f0f/llvm/lib/MC/MCParser/AsmParser.cpp"
, 1364)
;
1365}
1366
1367/// This function checks if the next token is <string> type or arithmetic.
1368/// string that begin with character '<' must end with character '>'.
1369/// otherwise it is arithmetics.
1370/// If the function returns a 'true' value,
1371/// the End argument will be filled with the last location pointed to the '>'
1372/// character.
1373
1374/// There is a gap between the AltMacro's documentation and the single quote
1375/// implementation. GCC does not fully support this feature and so we will not
1376/// support it.
1377/// TODO: Adding single quote as a string.
1378static bool isAngleBracketString(SMLoc &StrLoc, SMLoc &EndLoc) {
1379 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~++20210306111116+7ae191f59f0f/llvm/lib/MC/MCParser/AsmParser.cpp"
, 1380, __PRETTY_FUNCTION__))
1380 "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~++20210306111116+7ae191f59f0f/llvm/lib/MC/MCParser/AsmParser.cpp"
, 1380, __PRETTY_FUNCTION__))
;
1381 const char *CharPtr = StrLoc.getPointer();
1382 while ((*CharPtr != '>') && (*CharPtr != '\n') && (*CharPtr != '\r') &&
1383 (*CharPtr != '\0')) {
1384 if (*CharPtr == '!')
1385 CharPtr++;
1386 CharPtr++;
1387 }
1388 if (*CharPtr == '>') {
1389 EndLoc = StrLoc.getFromPointer(CharPtr + 1);
1390 return true;
1391 }
1392 return false;
1393}
1394
1395/// creating a string without the escape characters '!'.
1396static std::string angleBracketString(StringRef AltMacroStr) {
1397 std::string Res;
1398 for (size_t Pos = 0; Pos < AltMacroStr.size(); Pos++) {
1399 if (AltMacroStr[Pos] == '!')
1400 Pos++;
1401 Res += AltMacroStr[Pos];
1402 }
1403 return Res;
1404}
1405
1406/// Parse an expression and return it.
1407///
1408/// expr ::= expr &&,|| expr -> lowest.
1409/// expr ::= expr |,^,&,! expr
1410/// expr ::= expr ==,!=,<>,<,<=,>,>= expr
1411/// expr ::= expr <<,>> expr
1412/// expr ::= expr +,- expr
1413/// expr ::= expr *,/,% expr -> highest.
1414/// expr ::= primaryexpr
1415///
1416bool AsmParser::parseExpression(const MCExpr *&Res, SMLoc &EndLoc) {
1417 // Parse the expression.
1418 Res = nullptr;
1419 if (getTargetParser().parsePrimaryExpr(Res, EndLoc) ||
1420 parseBinOpRHS(1, Res, EndLoc))
1421 return true;
1422
1423 // As a special case, we support 'a op b @ modifier' by rewriting the
1424 // expression to include the modifier. This is inefficient, but in general we
1425 // expect users to use 'a@modifier op b'.
1426 if (Lexer.getKind() == AsmToken::At) {
1427 Lex();
1428
1429 if (Lexer.isNot(AsmToken::Identifier))
1430 return TokError("unexpected symbol modifier following '@'");
1431
1432 MCSymbolRefExpr::VariantKind Variant =
1433 MCSymbolRefExpr::getVariantKindForName(getTok().getIdentifier());
1434 if (Variant == MCSymbolRefExpr::VK_Invalid)
1435 return TokError("invalid variant '" + getTok().getIdentifier() + "'");
1436
1437 const MCExpr *ModifiedRes = applyModifierToExpr(Res, Variant);
1438 if (!ModifiedRes) {
1439 return TokError("invalid modifier '" + getTok().getIdentifier() +
1440 "' (no symbols present)");
1441 }
1442
1443 Res = ModifiedRes;
1444 Lex();
1445 }
1446
1447 // Try to constant fold it up front, if possible. Do not exploit
1448 // assembler here.
1449 int64_t Value;
1450 if (Res->evaluateAsAbsolute(Value))
1451 Res = MCConstantExpr::create(Value, getContext());
1452
1453 return false;
1454}
1455
1456bool AsmParser::parseParenExpression(const MCExpr *&Res, SMLoc &EndLoc) {
1457 Res = nullptr;
1458 return parseParenExpr(Res, EndLoc) || parseBinOpRHS(1, Res, EndLoc);
1459}
1460
1461bool AsmParser::parseParenExprOfDepth(unsigned ParenDepth, const MCExpr *&Res,
1462 SMLoc &EndLoc) {
1463 if (parseParenExpr(Res, EndLoc))
1464 return true;
1465
1466 for (; ParenDepth > 0; --ParenDepth) {
1467 if (parseBinOpRHS(1, Res, EndLoc))
1468 return true;
1469
1470 // We don't Lex() the last RParen.
1471 // This is the same behavior as parseParenExpression().
1472 if (ParenDepth - 1 > 0) {
1473 EndLoc = getTok().getEndLoc();
1474 if (parseToken(AsmToken::RParen,
1475 "expected ')' in parentheses expression"))
1476 return true;
1477 }
1478 }
1479 return false;
1480}
1481
1482bool AsmParser::parseAbsoluteExpression(int64_t &Res) {
1483 const MCExpr *Expr;
1484
1485 SMLoc StartLoc = Lexer.getLoc();
1486 if (parseExpression(Expr))
1487 return true;
1488
1489 if (!Expr->evaluateAsAbsolute(Res, getStreamer().getAssemblerPtr()))
1490 return Error(StartLoc, "expected absolute expression");
1491
1492 return false;
1493}
1494
1495static unsigned getDarwinBinOpPrecedence(AsmToken::TokenKind K,
1496 MCBinaryExpr::Opcode &Kind,
1497 bool ShouldUseLogicalShr) {
1498 switch (K) {
1499 default:
1500 return 0; // not a binop.
1501
1502 // Lowest Precedence: &&, ||
1503 case AsmToken::AmpAmp:
1504 Kind = MCBinaryExpr::LAnd;
1505 return 1;
1506 case AsmToken::PipePipe:
1507 Kind = MCBinaryExpr::LOr;
1508 return 1;
1509
1510 // Low Precedence: |, &, ^
1511 case AsmToken::Pipe:
1512 Kind = MCBinaryExpr::Or;
1513 return 2;
1514 case AsmToken::Caret:
1515 Kind = MCBinaryExpr::Xor;
1516 return 2;
1517 case AsmToken::Amp:
1518 Kind = MCBinaryExpr::And;
1519 return 2;
1520
1521 // Low Intermediate Precedence: ==, !=, <>, <, <=, >, >=
1522 case AsmToken::EqualEqual:
1523 Kind = MCBinaryExpr::EQ;
1524 return 3;
1525 case AsmToken::ExclaimEqual:
1526 case AsmToken::LessGreater:
1527 Kind = MCBinaryExpr::NE;
1528 return 3;
1529 case AsmToken::Less:
1530 Kind = MCBinaryExpr::LT;
1531 return 3;
1532 case AsmToken::LessEqual:
1533 Kind = MCBinaryExpr::LTE;
1534 return 3;
1535 case AsmToken::Greater:
1536 Kind = MCBinaryExpr::GT;
1537 return 3;
1538 case AsmToken::GreaterEqual:
1539 Kind = MCBinaryExpr::GTE;
1540 return 3;
1541
1542 // Intermediate Precedence: <<, >>
1543 case AsmToken::LessLess:
1544 Kind = MCBinaryExpr::Shl;
1545 return 4;
1546 case AsmToken::GreaterGreater:
1547 Kind = ShouldUseLogicalShr ? MCBinaryExpr::LShr : MCBinaryExpr::AShr;
1548 return 4;
1549
1550 // High Intermediate Precedence: +, -
1551 case AsmToken::Plus:
1552 Kind = MCBinaryExpr::Add;
1553 return 5;
1554 case AsmToken::Minus:
1555 Kind = MCBinaryExpr::Sub;
1556 return 5;
1557
1558 // Highest Precedence: *, /, %
1559 case AsmToken::Star:
1560 Kind = MCBinaryExpr::Mul;
1561 return 6;
1562 case AsmToken::Slash:
1563 Kind = MCBinaryExpr::Div;
1564 return 6;
1565 case AsmToken::Percent:
1566 Kind = MCBinaryExpr::Mod;
1567 return 6;
1568 }
1569}
1570
1571static unsigned getGNUBinOpPrecedence(const MCAsmInfo &MAI,
1572 AsmToken::TokenKind K,
1573 MCBinaryExpr::Opcode &Kind,
1574 bool ShouldUseLogicalShr) {
1575 switch (K) {
1576 default:
1577 return 0; // not a binop.
1578
1579 // Lowest Precedence: &&, ||
1580 case AsmToken::AmpAmp:
1581 Kind = MCBinaryExpr::LAnd;
1582 return 2;
1583 case AsmToken::PipePipe:
1584 Kind = MCBinaryExpr::LOr;
1585 return 1;
1586
1587 // Low Precedence: ==, !=, <>, <, <=, >, >=
1588 case AsmToken::EqualEqual:
1589 Kind = MCBinaryExpr::EQ;
1590 return 3;
1591 case AsmToken::ExclaimEqual:
1592 case AsmToken::LessGreater:
1593 Kind = MCBinaryExpr::NE;
1594 return 3;
1595 case AsmToken::Less:
1596 Kind = MCBinaryExpr::LT;
1597 return 3;
1598 case AsmToken::LessEqual:
1599 Kind = MCBinaryExpr::LTE;
1600 return 3;
1601 case AsmToken::Greater:
1602 Kind = MCBinaryExpr::GT;
1603 return 3;
1604 case AsmToken::GreaterEqual:
1605 Kind = MCBinaryExpr::GTE;
1606 return 3;
1607
1608 // Low Intermediate Precedence: +, -
1609 case AsmToken::Plus:
1610 Kind = MCBinaryExpr::Add;
1611 return 4;
1612 case AsmToken::Minus:
1613 Kind = MCBinaryExpr::Sub;
1614 return 4;
1615
1616 // High Intermediate Precedence: |, !, &, ^
1617 //
1618 case AsmToken::Pipe:
1619 Kind = MCBinaryExpr::Or;
1620 return 5;
1621 case AsmToken::Exclaim:
1622 // Hack to support ARM compatible aliases (implied 'sp' operand in 'srs*'
1623 // instructions like 'srsda #31!') and not parse ! as an infix operator.
1624 if (MAI.getCommentString() == "@")
1625 return 0;
1626 Kind = MCBinaryExpr::OrNot;
1627 return 5;
1628 case AsmToken::Caret:
1629 Kind = MCBinaryExpr::Xor;
1630 return 5;
1631 case AsmToken::Amp:
1632 Kind = MCBinaryExpr::And;
1633 return 5;
1634
1635 // Highest Precedence: *, /, %, <<, >>
1636 case AsmToken::Star:
1637 Kind = MCBinaryExpr::Mul;
1638 return 6;
1639 case AsmToken::Slash:
1640 Kind = MCBinaryExpr::Div;
1641 return 6;
1642 case AsmToken::Percent:
1643 Kind = MCBinaryExpr::Mod;
1644 return 6;
1645 case AsmToken::LessLess:
1646 Kind = MCBinaryExpr::Shl;
1647 return 6;
1648 case AsmToken::GreaterGreater:
1649 Kind = ShouldUseLogicalShr ? MCBinaryExpr::LShr : MCBinaryExpr::AShr;
1650 return 6;
1651 }
1652}
1653
1654unsigned AsmParser::getBinOpPrecedence(AsmToken::TokenKind K,
1655 MCBinaryExpr::Opcode &Kind) {
1656 bool ShouldUseLogicalShr = MAI.shouldUseLogicalShr();
1657 return IsDarwin ? getDarwinBinOpPrecedence(K, Kind, ShouldUseLogicalShr)
1658 : getGNUBinOpPrecedence(MAI, K, Kind, ShouldUseLogicalShr);
1659}
1660
1661/// Parse all binary operators with precedence >= 'Precedence'.
1662/// Res contains the LHS of the expression on input.
1663bool AsmParser::parseBinOpRHS(unsigned Precedence, const MCExpr *&Res,
1664 SMLoc &EndLoc) {
1665 SMLoc StartLoc = Lexer.getLoc();
1666 while (true) {
1667 MCBinaryExpr::Opcode Kind = MCBinaryExpr::Add;
1668 unsigned TokPrec = getBinOpPrecedence(Lexer.getKind(), Kind);
1669
1670 // If the next token is lower precedence than we are allowed to eat, return
1671 // successfully with what we ate already.
1672 if (TokPrec < Precedence)
1673 return false;
1674
1675 Lex();
1676
1677 // Eat the next primary expression.
1678 const MCExpr *RHS;
1679 if (getTargetParser().parsePrimaryExpr(RHS, EndLoc))
1680 return true;
1681
1682 // If BinOp binds less tightly with RHS than the operator after RHS, let
1683 // the pending operator take RHS as its LHS.
1684 MCBinaryExpr::Opcode Dummy;
1685 unsigned NextTokPrec = getBinOpPrecedence(Lexer.getKind(), Dummy);
1686 if (TokPrec < NextTokPrec && parseBinOpRHS(TokPrec + 1, RHS, EndLoc))
1687 return true;
1688
1689 // Merge LHS and RHS according to operator.
1690 Res = MCBinaryExpr::create(Kind, Res, RHS, getContext(), StartLoc);
1691 }
1692}
1693
1694/// ParseStatement:
1695/// ::= EndOfStatement
1696/// ::= Label* Directive ...Operands... EndOfStatement
1697/// ::= Label* Identifier OperandList* EndOfStatement
1698bool AsmParser::parseStatement(ParseStatementInfo &Info,
1699 MCAsmParserSemaCallback *SI) {
1700 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~++20210306111116+7ae191f59f0f/llvm/lib/MC/MCParser/AsmParser.cpp"
, 1700, __PRETTY_FUNCTION__))
;
1
'?' condition is true
1701 // Eat initial spaces and comments
1702 while (Lexer.is(AsmToken::Space))
2
Loop condition is false. Execution continues on line 1704
1703 Lex();
1704 if (Lexer.is(AsmToken::EndOfStatement)) {
3
Taking false branch
1705 // if this is a line comment we can drop it safely
1706 if (getTok().getString().empty() || getTok().getString().front() == '\r' ||
1707 getTok().getString().front() == '\n')
1708 Out.AddBlankLine();
1709 Lex();
1710 return false;
1711 }
1712 // Statements always start with an identifier.
1713 AsmToken ID = getTok();
1714 SMLoc IDLoc = ID.getLoc();
1715 StringRef IDVal;
1716 int64_t LocalLabelVal = -1;
1717 StartTokLoc = ID.getLoc();
1718 if (Lexer.is(AsmToken::HashDirective))
4
Taking false branch
1719 return parseCppHashLineFilenameComment(IDLoc,
1720 !isInsideMacroInstantiation());
1721
1722 // Allow an integer followed by a ':' as a directional local label.
1723 if (Lexer.is(AsmToken::Integer)) {
5
Taking false branch
1724 LocalLabelVal = getTok().getIntVal();
1725 if (LocalLabelVal < 0) {
1726 if (!TheCondState.Ignore) {
1727 Lex(); // always eat a token
1728 return Error(IDLoc, "unexpected token at start of statement");
1729 }
1730 IDVal = "";
1731 } else {
1732 IDVal = getTok().getString();
1733 Lex(); // Consume the integer token to be used as an identifier token.
1734 if (Lexer.getKind() != AsmToken::Colon) {
1735 if (!TheCondState.Ignore) {
1736 Lex(); // always eat a token
1737 return Error(IDLoc, "unexpected token at start of statement");
1738 }
1739 }
1740 }
1741 } else if (Lexer.is(AsmToken::Dot)) {
6
Taking false branch
1742 // Treat '.' as a valid identifier in this context.
1743 Lex();
1744 IDVal = ".";
1745 } else if (Lexer.is(AsmToken::LCurly)) {
7
Taking false branch
1746 // Treat '{' as a valid identifier in this context.
1747 Lex();
1748 IDVal = "{";
1749
1750 } else if (Lexer.is(AsmToken::RCurly)) {
8
Taking false branch
1751 // Treat '}' as a valid identifier in this context.
1752 Lex();
1753 IDVal = "}";
1754 } else if (Lexer.is(AsmToken::Star) &&
1755 getTargetParser().starIsStartOfStatement()) {
1756 // Accept '*' as a valid start of statement.
1757 Lex();
1758 IDVal = "*";
1759 } else if (parseIdentifier(IDVal)) {
9
Assuming the condition is false
10
Taking false branch
1760 if (!TheCondState.Ignore) {
1761 Lex(); // always eat a token
1762 return Error(IDLoc, "unexpected token at start of statement");
1763 }
1764 IDVal = "";
1765 }
1766
1767 // Handle conditional assembly here before checking for skipping. We
1768 // have to do this so that .endif isn't skipped in a ".if 0" block for
1769 // example.
1770 StringMap<DirectiveKind>::const_iterator DirKindIt =
1771 DirectiveKindMap.find(IDVal.lower());
1772 DirectiveKind DirKind = (DirKindIt == DirectiveKindMap.end())
11
'?' condition is false
1773
1774 ? DK_NO_DIRECTIVE
1775 : DirKindIt->getValue();
1776 switch (DirKind) {
12
Control jumps to the 'default' case at line 1777
1777 default:
1778 break;
13
Execution continues on line 1814
1779 case DK_IF:
1780 case DK_IFEQ:
1781 case DK_IFGE:
1782 case DK_IFGT:
1783 case DK_IFLE:
1784 case DK_IFLT:
1785 case DK_IFNE:
1786 return parseDirectiveIf(IDLoc, DirKind);
1787 case DK_IFB:
1788 return parseDirectiveIfb(IDLoc, true);
1789 case DK_IFNB:
1790 return parseDirectiveIfb(IDLoc, false);
1791 case DK_IFC:
1792 return parseDirectiveIfc(IDLoc, true);
1793 case DK_IFEQS:
1794 return parseDirectiveIfeqs(IDLoc, true);
1795 case DK_IFNC:
1796 return parseDirectiveIfc(IDLoc, false);
1797 case DK_IFNES:
1798 return parseDirectiveIfeqs(IDLoc, false);
1799 case DK_IFDEF:
1800 return parseDirectiveIfdef(IDLoc, true);
1801 case DK_IFNDEF:
1802 case DK_IFNOTDEF:
1803 return parseDirectiveIfdef(IDLoc, false);
1804 case DK_ELSEIF:
1805 return parseDirectiveElseIf(IDLoc);
1806 case DK_ELSE:
1807 return parseDirectiveElse(IDLoc);
1808 case DK_ENDIF:
1809 return parseDirectiveEndIf(IDLoc);
1810 }
1811
1812 // Ignore the statement if in the middle of inactive conditional
1813 // (e.g. ".if 0").
1814 if (TheCondState.Ignore) {
14
Assuming field 'Ignore' is false
15
Taking false branch
1815 eatToEndOfStatement();
1816 return false;
1817 }
1818
1819 // FIXME: Recurse on local labels?
1820
1821 // See what kind of statement we have.
1822 switch (Lexer.getKind()) {
16
Control jumps to the 'default' case at line 1896
1823 case AsmToken::Colon: {
1824 if (!getTargetParser().isLabel(ID))
1825 break;
1826 if (checkForValidSection())
1827 return true;
1828
1829 // identifier ':' -> Label.
1830 Lex();
1831
1832 // Diagnose attempt to use '.' as a label.
1833 if (IDVal == ".")
1834 return Error(IDLoc, "invalid use of pseudo-symbol '.' as a label");
1835
1836 // Diagnose attempt to use a variable as a label.
1837 //
1838 // FIXME: Diagnostics. Note the location of the definition as a label.
1839 // FIXME: This doesn't diagnose assignment to a symbol which has been
1840 // implicitly marked as external.
1841 MCSymbol *Sym;
1842 if (LocalLabelVal == -1) {
1843 if (ParsingMSInlineAsm && SI) {
1844 StringRef RewrittenLabel =
1845 SI->LookupInlineAsmLabel(IDVal, getSourceManager(), IDLoc, true);
1846 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~++20210306111116+7ae191f59f0f/llvm/lib/MC/MCParser/AsmParser.cpp"
, 1847, __PRETTY_FUNCTION__))
1847 "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~++20210306111116+7ae191f59f0f/llvm/lib/MC/MCParser/AsmParser.cpp"
, 1847, __PRETTY_FUNCTION__))
;
1848 Info.AsmRewrites->emplace_back(AOK_Label, IDLoc, IDVal.size(),
1849 RewrittenLabel);
1850 IDVal = RewrittenLabel;
1851 }
1852 Sym = getContext().getOrCreateSymbol(IDVal);
1853 } else
1854 Sym = Ctx.createDirectionalLocalSymbol(LocalLabelVal);
1855 // End of Labels should be treated as end of line for lexing
1856 // purposes but that information is not available to the Lexer who
1857 // does not understand Labels. This may cause us to see a Hash
1858 // here instead of a preprocessor line comment.
1859 if (getTok().is(AsmToken::Hash)) {
1860 StringRef CommentStr = parseStringToEndOfStatement();
1861 Lexer.Lex();
1862 Lexer.UnLex(AsmToken(AsmToken::EndOfStatement, CommentStr));
1863 }
1864
1865 // Consume any end of statement token, if present, to avoid spurious
1866 // AddBlankLine calls().
1867 if (getTok().is(AsmToken::EndOfStatement)) {
1868 Lex();
1869 }
1870
1871 getTargetParser().doBeforeLabelEmit(Sym);
1872
1873 // Emit the label.
1874 if (!getTargetParser().isParsingMSInlineAsm())
1875 Out.emitLabel(Sym, IDLoc);
1876
1877 // If we are generating dwarf for assembly source files then gather the
1878 // info to make a dwarf label entry for this label if needed.
1879 if (enabledGenDwarfForAssembly())
1880 MCGenDwarfLabelEntry::Make(Sym, &getStreamer(), getSourceManager(),
1881 IDLoc);
1882
1883 getTargetParser().onLabelParsed(Sym);
1884
1885 return false;
1886 }
1887
1888 case AsmToken::Equal:
1889 if (!getTargetParser().equalIsAsmAssignment())
1890 break;
1891 // identifier '=' ... -> assignment statement
1892 Lex();
1893
1894 return parseAssignment(IDVal, true);
1895
1896 default: // Normal instruction or directive.
1897 break;
17
Execution continues on line 1901
1898 }
1899
1900 // If macros are enabled, check to see if this is a macro instantiation.
1901 if (areMacrosEnabled())
18
Assuming the condition is false
19
Taking false branch
1902 if (const MCAsmMacro *M = getContext().lookupMacro(IDVal)) {
1903 return handleMacroEntry(M, IDLoc);
1904 }
1905
1906 // Otherwise, we have a normal instruction or directive.
1907
1908 // Directives start with "."
1909 if (IDVal.startswith(".") && IDVal != ".") {
20
Assuming the condition is true
21
Taking true branch
1910 // There are several entities interested in parsing directives:
1911 //
1912 // 1. The target-specific assembly parser. Some directives are target
1913 // specific or may potentially behave differently on certain targets.
1914 // 2. Asm parser extensions. For example, platform-specific parsers
1915 // (like the ELF parser) register themselves as extensions.
1916 // 3. The generic directive parser implemented by this class. These are
1917 // all the directives that behave in a target and platform independent
1918 // manner, or at least have a default behavior that's shared between
1919 // all targets and platforms.
1920
1921 getTargetParser().flushPendingInstructions(getStreamer());
1922
1923 SMLoc StartTokLoc = getTok().getLoc();
1924 bool TPDirectiveReturn = getTargetParser().ParseDirective(ID);
1925
1926 if (hasPendingError())
22
Taking false branch
1927 return true;
1928 // Currently the return value should be true if we are
1929 // uninterested but as this is at odds with the standard parsing
1930 // convention (return true = error) we have instances of a parsed
1931 // directive that fails returning true as an error. Catch these
1932 // cases as best as possible errors here.
1933 if (TPDirectiveReturn && StartTokLoc != getTok().getLoc())
23
Assuming 'TPDirectiveReturn' is true
24
Taking false branch
1934 return true;
1935 // Return if we did some parsing or believe we succeeded.
1936 if (!TPDirectiveReturn
24.1
'TPDirectiveReturn' is true
24.1
'TPDirectiveReturn' is true
24.1
'TPDirectiveReturn' is true
|| StartTokLoc != getTok().getLoc())
25
Taking false branch
1937 return false;
1938
1939 // Next, check the extension directive map to see if any extension has
1940 // registered itself to parse this directive.
1941 std::pair<MCAsmParserExtension *, DirectiveHandler> Handler =
1942 ExtensionDirectiveMap.lookup(IDVal);
1943 if (Handler.first)
26
Assuming field 'first' is null
27
Taking false branch
1944 return (*Handler.second)(Handler.first, IDVal, IDLoc);
1945
1946 // Finally, if no one else is interested in this directive, it must be
1947 // generic and familiar to this class.
1948 switch (DirKind) {
28
Control jumps to 'case DK_PSEUDO_PROBE:' at line 2209
1949 default:
1950 break;
1951 case DK_SET:
1952 case DK_EQU:
1953 return parseDirectiveSet(IDVal, true);
1954 case DK_EQUIV:
1955 return parseDirectiveSet(IDVal, false);
1956 case DK_ASCII:
1957 return parseDirectiveAscii(IDVal, false);
1958 case DK_ASCIZ:
1959 case DK_STRING:
1960 return parseDirectiveAscii(IDVal, true);
1961 case DK_BYTE:
1962 case DK_DC_B:
1963 return parseDirectiveValue(IDVal, 1);
1964 case DK_DC:
1965 case DK_DC_W:
1966 case DK_SHORT:
1967 case DK_VALUE:
1968 case DK_2BYTE:
1969 return parseDirectiveValue(IDVal, 2);
1970 case DK_LONG:
1971 case DK_INT:
1972 case DK_4BYTE:
1973 case DK_DC_L:
1974 return parseDirectiveValue(IDVal, 4);
1975 case DK_QUAD:
1976 case DK_8BYTE:
1977 return parseDirectiveValue(IDVal, 8);
1978 case DK_DC_A:
1979 return parseDirectiveValue(
1980 IDVal, getContext().getAsmInfo()->getCodePointerSize());
1981 case DK_OCTA:
1982 return parseDirectiveOctaValue(IDVal);
1983 case DK_SINGLE:
1984 case DK_FLOAT:
1985 case DK_DC_S:
1986 return parseDirectiveRealValue(IDVal, APFloat::IEEEsingle());
1987 case DK_DOUBLE:
1988 case DK_DC_D:
1989 return parseDirectiveRealValue(IDVal, APFloat::IEEEdouble());
1990 case DK_ALIGN: {
1991 bool IsPow2 = !getContext().getAsmInfo()->getAlignmentIsInBytes();
1992 return parseDirectiveAlign(IsPow2, /*ExprSize=*/1);
1993 }
1994 case DK_ALIGN32: {
1995 bool IsPow2 = !getContext().getAsmInfo()->getAlignmentIsInBytes();
1996 return parseDirectiveAlign(IsPow2, /*ExprSize=*/4);
1997 }
1998 case DK_BALIGN:
1999 return parseDirectiveAlign(/*IsPow2=*/false, /*ExprSize=*/1);
2000 case DK_BALIGNW:
2001 return parseDirectiveAlign(/*IsPow2=*/false, /*ExprSize=*/2);
2002 case DK_BALIGNL:
2003 return parseDirectiveAlign(/*IsPow2=*/false, /*ExprSize=*/4);
2004 case DK_P2ALIGN:
2005 return parseDirectiveAlign(/*IsPow2=*/true, /*ExprSize=*/1);
2006 case DK_P2ALIGNW:
2007 return parseDirectiveAlign(/*IsPow2=*/true, /*ExprSize=*/2);
2008 case DK_P2ALIGNL:
2009 return parseDirectiveAlign(/*IsPow2=*/true, /*ExprSize=*/4);
2010 case DK_ORG:
2011 return parseDirectiveOrg();
2012 case DK_FILL:
2013 return parseDirectiveFill();
2014 case DK_ZERO:
2015 return parseDirectiveZero();
2016 case DK_EXTERN:
2017 eatToEndOfStatement(); // .extern is the default, ignore it.
2018 return false;
2019 case DK_GLOBL:
2020 case DK_GLOBAL:
2021 return parseDirectiveSymbolAttribute(MCSA_Global);
2022 case DK_LAZY_REFERENCE:
2023 return parseDirectiveSymbolAttribute(MCSA_LazyReference);
2024 case DK_NO_DEAD_STRIP:
2025 return parseDirectiveSymbolAttribute(MCSA_NoDeadStrip);
2026 case DK_SYMBOL_RESOLVER:
2027 return parseDirectiveSymbolAttribute(MCSA_SymbolResolver);
2028 case DK_PRIVATE_EXTERN:
2029 return parseDirectiveSymbolAttribute(MCSA_PrivateExtern);
2030 case DK_REFERENCE:
2031 return parseDirectiveSymbolAttribute(MCSA_Reference);
2032 case DK_WEAK_DEFINITION:
2033 return parseDirectiveSymbolAttribute(MCSA_WeakDefinition);
2034 case DK_WEAK_REFERENCE:
2035 return parseDirectiveSymbolAttribute(MCSA_WeakReference);
2036 case DK_WEAK_DEF_CAN_BE_HIDDEN:
2037 return parseDirectiveSymbolAttribute(MCSA_WeakDefAutoPrivate);
2038 case DK_COLD:
2039 return parseDirectiveSymbolAttribute(MCSA_Cold);
2040 case DK_COMM:
2041 case DK_COMMON:
2042 return parseDirectiveComm(/*IsLocal=*/false);
2043 case DK_LCOMM:
2044 return parseDirectiveComm(/*IsLocal=*/true);
2045 case DK_ABORT:
2046 return parseDirectiveAbort();
2047 case DK_INCLUDE:
2048 return parseDirectiveInclude();
2049 case DK_INCBIN:
2050 return parseDirectiveIncbin();
2051 case DK_CODE16:
2052 case DK_CODE16GCC:
2053 return TokError(Twine(IDVal) +
2054 " not currently supported for this target");
2055 case DK_REPT:
2056 return parseDirectiveRept(IDLoc, IDVal);
2057 case DK_IRP:
2058 return parseDirectiveIrp(IDLoc);
2059 case DK_IRPC:
2060 return parseDirectiveIrpc(IDLoc);
2061 case DK_ENDR:
2062 return parseDirectiveEndr(IDLoc);
2063 case DK_BUNDLE_ALIGN_MODE:
2064 return parseDirectiveBundleAlignMode();
2065 case DK_BUNDLE_LOCK:
2066 return parseDirectiveBundleLock();
2067 case DK_BUNDLE_UNLOCK:
2068 return parseDirectiveBundleUnlock();
2069 case DK_SLEB128:
2070 return parseDirectiveLEB128(true);
2071 case DK_ULEB128:
2072 return parseDirectiveLEB128(false);
2073 case DK_SPACE:
2074 case DK_SKIP:
2075 return parseDirectiveSpace(IDVal);
2076 case DK_FILE:
2077 return parseDirectiveFile(IDLoc);
2078 case DK_LINE:
2079 return parseDirectiveLine();
2080 case DK_LOC:
2081 return parseDirectiveLoc();
2082 case DK_STABS:
2083 return parseDirectiveStabs();
2084 case DK_CV_FILE:
2085 return parseDirectiveCVFile();
2086 case DK_CV_FUNC_ID:
2087 return parseDirectiveCVFuncId();
2088 case DK_CV_INLINE_SITE_ID:
2089 return parseDirectiveCVInlineSiteId();
2090 case DK_CV_LOC:
2091 return parseDirectiveCVLoc();
2092 case DK_CV_LINETABLE:
2093 return parseDirectiveCVLinetable();
2094 case DK_CV_INLINE_LINETABLE:
2095 return parseDirectiveCVInlineLinetable();
2096 case DK_CV_DEF_RANGE:
2097 return parseDirectiveCVDefRange();
2098 case DK_CV_STRING:
2099 return parseDirectiveCVString();
2100 case DK_CV_STRINGTABLE:
2101 return parseDirectiveCVStringTable();
2102 case DK_CV_FILECHECKSUMS:
2103 return parseDirectiveCVFileChecksums();
2104 case DK_CV_FILECHECKSUM_OFFSET:
2105 return parseDirectiveCVFileChecksumOffset();
2106 case DK_CV_FPO_DATA:
2107 return parseDirectiveCVFPOData();
2108 case DK_CFI_SECTIONS:
2109 return parseDirectiveCFISections();
2110 case DK_CFI_STARTPROC:
2111 return parseDirectiveCFIStartProc();
2112 case DK_CFI_ENDPROC:
2113 return parseDirectiveCFIEndProc();
2114 case DK_CFI_DEF_CFA:
2115 return parseDirectiveCFIDefCfa(IDLoc);
2116 case DK_CFI_DEF_CFA_OFFSET:
2117 return parseDirectiveCFIDefCfaOffset();
2118 case DK_CFI_ADJUST_CFA_OFFSET:
2119 return parseDirectiveCFIAdjustCfaOffset();
2120 case DK_CFI_DEF_CFA_REGISTER:
2121 return parseDirectiveCFIDefCfaRegister(IDLoc);
2122 case DK_CFI_OFFSET:
2123 return parseDirectiveCFIOffset(IDLoc);
2124 case DK_CFI_REL_OFFSET:
2125 return parseDirectiveCFIRelOffset(IDLoc);
2126 case DK_CFI_PERSONALITY:
2127 return parseDirectiveCFIPersonalityOrLsda(true);
2128 case DK_CFI_LSDA:
2129 return parseDirectiveCFIPersonalityOrLsda(false);
2130 case DK_CFI_REMEMBER_STATE:
2131 return parseDirectiveCFIRememberState();
2132 case DK_CFI_RESTORE_STATE:
2133 return parseDirectiveCFIRestoreState();
2134 case DK_CFI_SAME_VALUE:
2135 return parseDirectiveCFISameValue(IDLoc);
2136 case DK_CFI_RESTORE:
2137 return parseDirectiveCFIRestore(IDLoc);
2138 case DK_CFI_ESCAPE:
2139 return parseDirectiveCFIEscape();
2140 case DK_CFI_RETURN_COLUMN:
2141 return parseDirectiveCFIReturnColumn(IDLoc);
2142 case DK_CFI_SIGNAL_FRAME:
2143 return parseDirectiveCFISignalFrame();
2144 case DK_CFI_UNDEFINED:
2145 return parseDirectiveCFIUndefined(IDLoc);
2146 case DK_CFI_REGISTER:
2147 return parseDirectiveCFIRegister(IDLoc);
2148 case DK_CFI_WINDOW_SAVE:
2149 return parseDirectiveCFIWindowSave();
2150 case DK_MACROS_ON:
2151 case DK_MACROS_OFF:
2152 return parseDirectiveMacrosOnOff(IDVal);
2153 case DK_MACRO:
2154 return parseDirectiveMacro(IDLoc);
2155 case DK_ALTMACRO:
2156 case DK_NOALTMACRO:
2157 return parseDirectiveAltmacro(IDVal);
2158 case DK_EXITM:
2159 return parseDirectiveExitMacro(IDVal);
2160 case DK_ENDM:
2161 case DK_ENDMACRO:
2162 return parseDirectiveEndMacro(IDVal);
2163 case DK_PURGEM:
2164 return parseDirectivePurgeMacro(IDLoc);
2165 case DK_END:
2166 return parseDirectiveEnd(IDLoc);
2167 case DK_ERR:
2168 return parseDirectiveError(IDLoc, false);
2169 case DK_ERROR:
2170 return parseDirectiveError(IDLoc, true);
2171 case DK_WARNING:
2172 return parseDirectiveWarning(IDLoc);
2173 case DK_RELOC:
2174 return parseDirectiveReloc(IDLoc);
2175 case DK_DCB:
2176 case DK_DCB_W:
2177 return parseDirectiveDCB(IDVal, 2);
2178 case DK_DCB_B:
2179 return parseDirectiveDCB(IDVal, 1);
2180 case DK_DCB_D:
2181 return parseDirectiveRealDCB(IDVal, APFloat::IEEEdouble());
2182 case DK_DCB_L:
2183 return parseDirectiveDCB(IDVal, 4);
2184 case DK_DCB_S:
2185 return parseDirectiveRealDCB(IDVal, APFloat::IEEEsingle());
2186 case DK_DC_X:
2187 case DK_DCB_X:
2188 return TokError(Twine(IDVal) +
2189 " not currently supported for this target");
2190 case DK_DS:
2191 case DK_DS_W:
2192 return parseDirectiveDS(IDVal, 2);
2193 case DK_DS_B:
2194 return parseDirectiveDS(IDVal, 1);
2195 case DK_DS_D:
2196 return parseDirectiveDS(IDVal, 8);
2197 case DK_DS_L:
2198 case DK_DS_S:
2199 return parseDirectiveDS(IDVal, 4);
2200 case DK_DS_P:
2201 case DK_DS_X:
2202 return parseDirectiveDS(IDVal, 12);
2203 case DK_PRINT:
2204 return parseDirectivePrint(IDLoc);
2205 case DK_ADDRSIG:
2206 return parseDirectiveAddrsig();
2207 case DK_ADDRSIG_SYM:
2208 return parseDirectiveAddrsigSym();
2209 case DK_PSEUDO_PROBE:
2210 return parseDirectivePseudoProbe();
29
Calling 'AsmParser::parseDirectivePseudoProbe'
2211 }
2212
2213 return Error(IDLoc, "unknown directive");
2214 }
2215
2216 // __asm _emit or __asm __emit
2217 if (ParsingMSInlineAsm && (IDVal == "_emit" || IDVal == "__emit" ||
2218 IDVal == "_EMIT" || IDVal == "__EMIT"))
2219 return parseDirectiveMSEmit(IDLoc, Info, IDVal.size());
2220
2221 // __asm align
2222 if (ParsingMSInlineAsm && (IDVal == "align" || IDVal == "ALIGN"))
2223 return parseDirectiveMSAlign(IDLoc, Info);
2224
2225 if (ParsingMSInlineAsm && (IDVal == "even" || IDVal == "EVEN"))
2226 Info.AsmRewrites->emplace_back(AOK_EVEN, IDLoc, 4);
2227 if (checkForValidSection())
2228 return true;
2229
2230 // Canonicalize the opcode to lower case.
2231 std::string OpcodeStr = IDVal.lower();
2232 ParseInstructionInfo IInfo(Info.AsmRewrites);
2233 bool ParseHadError = getTargetParser().ParseInstruction(IInfo, OpcodeStr, ID,
2234 Info.ParsedOperands);
2235 Info.ParseError = ParseHadError;
2236
2237 // Dump the parsed representation, if requested.
2238 if (getShowParsedOperands()) {
2239 SmallString<256> Str;
2240 raw_svector_ostream OS(Str);
2241 OS << "parsed instruction: [";
2242 for (unsigned i = 0; i != Info.ParsedOperands.size(); ++i) {
2243 if (i != 0)
2244 OS << ", ";
2245 Info.ParsedOperands[i]->print(OS);
2246 }
2247 OS << "]";
2248
2249 printMessage(IDLoc, SourceMgr::DK_Note, OS.str());
2250 }
2251
2252 // Fail even if ParseInstruction erroneously returns false.
2253 if (hasPendingError() || ParseHadError)
2254 return true;
2255
2256 // If we are generating dwarf for the current section then generate a .loc
2257 // directive for the instruction.
2258 if (!ParseHadError && enabledGenDwarfForAssembly() &&
2259 getContext().getGenDwarfSectionSyms().count(
2260 getStreamer().getCurrentSectionOnly())) {
2261 unsigned Line;
2262 if (ActiveMacros.empty())
2263 Line = SrcMgr.FindLineNumber(IDLoc, CurBuffer);
2264 else
2265 Line = SrcMgr.FindLineNumber(ActiveMacros.front()->InstantiationLoc,
2266 ActiveMacros.front()->ExitBuffer);
2267
2268 // If we previously parsed a cpp hash file line comment then make sure the
2269 // current Dwarf File is for the CppHashFilename if not then emit the
2270 // Dwarf File table for it and adjust the line number for the .loc.
2271 if (!CppHashInfo.Filename.empty()) {
2272 unsigned FileNumber = getStreamer().emitDwarfFileDirective(
2273 0, StringRef(), CppHashInfo.Filename);
2274 getContext().setGenDwarfFileNumber(FileNumber);
2275
2276 unsigned CppHashLocLineNo =
2277 SrcMgr.FindLineNumber(CppHashInfo.Loc, CppHashInfo.Buf);
2278 Line = CppHashInfo.LineNumber - 1 + (Line - CppHashLocLineNo);
2279 }
2280
2281 getStreamer().emitDwarfLocDirective(
2282 getContext().getGenDwarfFileNumber(), Line, 0,
2283 DWARF2_LINE_DEFAULT_IS_STMT1 ? DWARF2_FLAG_IS_STMT(1 << 0) : 0, 0, 0,
2284 StringRef());
2285 }
2286
2287 // If parsing succeeded, match the instruction.
2288 if (!ParseHadError) {
2289 uint64_t ErrorInfo;
2290 if (getTargetParser().MatchAndEmitInstruction(
2291 IDLoc, Info.Opcode, Info.ParsedOperands, Out, ErrorInfo,
2292 getTargetParser().isParsingMSInlineAsm()))
2293 return true;
2294 }
2295 return false;
2296}
2297
2298// Parse and erase curly braces marking block start/end
2299bool
2300AsmParser::parseCurlyBlockScope(SmallVectorImpl<AsmRewrite> &AsmStrRewrites) {
2301 // Identify curly brace marking block start/end
2302 if (Lexer.isNot(AsmToken::LCurly) && Lexer.isNot(AsmToken::RCurly))
2303 return false;
2304
2305 SMLoc StartLoc = Lexer.getLoc();
2306 Lex(); // Eat the brace
2307 if (Lexer.is(AsmToken::EndOfStatement))
2308 Lex(); // Eat EndOfStatement following the brace
2309
2310 // Erase the block start/end brace from the output asm string
2311 AsmStrRewrites.emplace_back(AOK_Skip, StartLoc, Lexer.getLoc().getPointer() -
2312 StartLoc.getPointer());
2313 return true;
2314}
2315
2316/// parseCppHashLineFilenameComment as this:
2317/// ::= # number "filename"
2318bool AsmParser::parseCppHashLineFilenameComment(SMLoc L, bool SaveLocInfo) {
2319 Lex(); // Eat the hash token.
2320 // Lexer only ever emits HashDirective if it fully formed if it's
2321 // done the checking already so this is an internal error.
2322 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~++20210306111116+7ae191f59f0f/llvm/lib/MC/MCParser/AsmParser.cpp"
, 2323, __PRETTY_FUNCTION__))
2323 "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~++20210306111116+7ae191f59f0f/llvm/lib/MC/MCParser/AsmParser.cpp"
, 2323, __PRETTY_FUNCTION__))
;
2324 int64_t LineNumber = getTok().getIntVal();
2325 Lex();
2326 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~++20210306111116+7ae191f59f0f/llvm/lib/MC/MCParser/AsmParser.cpp"
, 2327, __PRETTY_FUNCTION__))
2327 "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~++20210306111116+7ae191f59f0f/llvm/lib/MC/MCParser/AsmParser.cpp"
, 2327, __PRETTY_FUNCTION__))
;
2328 StringRef Filename = getTok().getString();
2329 Lex();
2330
2331 if (!SaveLocInfo)
2332 return false;
2333
2334 // Get rid of the enclosing quotes.
2335 Filename = Filename.substr(1, Filename.size() - 2);
2336
2337 // Save the SMLoc, Filename and LineNumber for later use by diagnostics
2338 // and possibly DWARF file info.
2339 CppHashInfo.Loc = L;
2340 CppHashInfo.Filename = Filename;
2341 CppHashInfo.LineNumber = LineNumber;
2342 CppHashInfo.Buf = CurBuffer;
2343 if (FirstCppHashFilename.empty())
2344 FirstCppHashFilename = Filename;
2345 return false;
2346}
2347
2348/// will use the last parsed cpp hash line filename comment
2349/// for the Filename and LineNo if any in the diagnostic.
2350void AsmParser::DiagHandler(const SMDiagnostic &Diag, void *Context) {
2351 auto *Parser = static_cast<AsmParser *>(Context);
2352 raw_ostream &OS = errs();
2353
2354 const SourceMgr &DiagSrcMgr = *Diag.getSourceMgr();
2355 SMLoc DiagLoc = Diag.getLoc();
2356 unsigned DiagBuf = DiagSrcMgr.FindBufferContainingLoc(DiagLoc);
2357 unsigned CppHashBuf =
2358 Parser->SrcMgr.FindBufferContainingLoc(Parser->CppHashInfo.Loc);
2359
2360 // Like SourceMgr::printMessage() we need to print the include stack if any
2361 // before printing the message.
2362 unsigned DiagCurBuffer = DiagSrcMgr.FindBufferContainingLoc(DiagLoc);
2363 if (!Parser->SavedDiagHandler && DiagCurBuffer &&
2364 DiagCurBuffer != DiagSrcMgr.getMainFileID()) {
2365 SMLoc ParentIncludeLoc = DiagSrcMgr.getParentIncludeLoc(DiagCurBuffer);
2366 DiagSrcMgr.PrintIncludeStack(ParentIncludeLoc, OS);
2367 }
2368
2369 // If we have not parsed a cpp hash line filename comment or the source
2370 // manager changed or buffer changed (like in a nested include) then just
2371 // print the normal diagnostic using its Filename and LineNo.
2372 if (!Parser->CppHashInfo.LineNumber || DiagBuf != CppHashBuf) {
2373 if (Parser->SavedDiagHandler)
2374 Parser->SavedDiagHandler(Diag, Parser->SavedDiagContext);
2375 else
2376 Parser->getContext().diagnose(Diag);
2377 return;
2378 }
2379
2380 // Use the CppHashFilename and calculate a line number based on the
2381 // CppHashInfo.Loc and CppHashInfo.LineNumber relative to this Diag's SMLoc
2382 // for the diagnostic.
2383 const std::string &Filename = std::string(Parser->CppHashInfo.Filename);
2384
2385 int DiagLocLineNo = DiagSrcMgr.FindLineNumber(DiagLoc, DiagBuf);
2386 int CppHashLocLineNo =
2387 Parser->SrcMgr.FindLineNumber(Parser->CppHashInfo.Loc, CppHashBuf);
2388 int LineNo =
2389 Parser->CppHashInfo.LineNumber - 1 + (DiagLocLineNo - CppHashLocLineNo);
2390
2391 SMDiagnostic NewDiag(*Diag.getSourceMgr(), Diag.getLoc(), Filename, LineNo,
2392 Diag.getColumnNo(), Diag.getKind(), Diag.getMessage(),
2393 Diag.getLineContents(), Diag.getRanges());
2394
2395 if (Parser->SavedDiagHandler)
2396 Parser->SavedDiagHandler(Diag, Parser->SavedDiagContext);
2397 else
2398 Parser->getContext().diagnose(NewDiag);
2399}
2400
2401// FIXME: This is mostly duplicated from the function in AsmLexer.cpp. The
2402// difference being that that function accepts '@' as part of identifiers and
2403// we can't do that. AsmLexer.cpp should probably be changed to handle
2404// '@' as a special case when needed.
2405static bool isIdentifierChar(char c) {
2406 return isalnum(static_cast<unsigned char>(c)) || c == '_' || c == '$' ||
2407 c == '.';
2408}
2409
2410bool AsmParser::expandMacro(raw_svector_ostream &OS, StringRef Body,
2411 ArrayRef<MCAsmMacroParameter> Parameters,
2412 ArrayRef<MCAsmMacroArgument> A,
2413 bool EnableAtPseudoVariable, SMLoc L) {
2414 unsigned NParameters = Parameters.size();
2415 bool HasVararg = NParameters ? Parameters.back().Vararg : false;
2416 if ((!IsDarwin || NParameters != 0) && NParameters != A.size())
2417 return Error(L, "Wrong number of arguments");
2418
2419 // A macro without parameters is handled differently on Darwin:
2420 // gas accepts no arguments and does no substitutions
2421 while (!Body.empty()) {
2422 // Scan for the next substitution.
2423 std::size_t End = Body.size(), Pos = 0;
2424 for (; Pos != End; ++Pos) {
2425 // Check for a substitution or escape.
2426 if (IsDarwin && !NParameters) {
2427 // This macro has no parameters, look for $0, $1, etc.
2428 if (Body[Pos] != '$' || Pos + 1 == End)
2429 continue;
2430
2431 char Next = Body[Pos + 1];
2432 if (Next == '$' || Next == 'n' ||
2433 isdigit(static_cast<unsigned char>(Next)))
2434 break;
2435 } else {
2436 // This macro has parameters, look for \foo, \bar, etc.
2437 if (Body[Pos] == '\\' && Pos + 1 != End)
2438 break;
2439 }
2440 }
2441
2442 // Add the prefix.
2443 OS << Body.slice(0, Pos);
2444
2445 // Check if we reached the end.
2446 if (Pos == End)
2447 break;
2448
2449 if (IsDarwin && !NParameters) {
2450 switch (Body[Pos + 1]) {
2451 // $$ => $
2452 case '$':
2453 OS << '$';
2454 break;
2455
2456 // $n => number of arguments
2457 case 'n':
2458 OS << A.size();
2459 break;
2460
2461 // $[0-9] => argument
2462 default: {
2463 // Missing arguments are ignored.
2464 unsigned Index = Body[Pos + 1] - '0';
2465 if (Index >= A.size())
2466 break;
2467
2468 // Otherwise substitute with the token values, with spaces eliminated.
2469 for (const AsmToken &Token : A[Index])
2470 OS << Token.getString();
2471 break;
2472 }
2473 }
2474 Pos += 2;
2475 } else {
2476 unsigned I = Pos + 1;
2477
2478 // Check for the \@ pseudo-variable.
2479 if (EnableAtPseudoVariable && Body[I] == '@' && I + 1 != End)
2480 ++I;
2481 else
2482 while (isIdentifierChar(Body[I]) && I + 1 != End)
2483 ++I;
2484
2485 const char *Begin = Body.data() + Pos + 1;
2486 StringRef Argument(Begin, I - (Pos + 1));
2487 unsigned Index = 0;
2488
2489 if (Argument == "@") {
2490 OS << NumOfMacroInstantiations;
2491 Pos += 2;
2492 } else {
2493 for (; Index < NParameters; ++Index)
2494 if (Parameters[Index].Name == Argument)
2495 break;
2496
2497 if (Index == NParameters) {
2498 if (Body[Pos + 1] == '(' && Body[Pos + 2] == ')')
2499 Pos += 3;
2500 else {
2501 OS << '\\' << Argument;
2502 Pos = I;
2503 }
2504 } else {
2505 bool VarargParameter = HasVararg && Index == (NParameters - 1);
2506 for (const AsmToken &Token : A[Index])
2507 // For altmacro mode, you can write '%expr'.
2508 // The prefix '%' evaluates the expression 'expr'
2509 // and uses the result as a string (e.g. replace %(1+2) with the
2510 // string "3").
2511 // Here, we identify the integer token which is the result of the
2512 // absolute expression evaluation and replace it with its string
2513 // representation.
2514 if (AltMacroMode && Token.getString().front() == '%' &&
2515 Token.is(AsmToken::Integer))
2516 // Emit an integer value to the buffer.
2517 OS << Token.getIntVal();
2518 // Only Token that was validated as a string and begins with '<'
2519 // is considered altMacroString!!!
2520 else if (AltMacroMode && Token.getString().front() == '<' &&
2521 Token.is(AsmToken::String)) {
2522 OS << angleBracketString(Token.getStringContents());
2523 }
2524 // We expect no quotes around the string's contents when
2525 // parsing for varargs.
2526 else if (Token.isNot(AsmToken::String) || VarargParameter)
2527 OS << Token.getString();
2528 else
2529 OS << Token.getStringContents();
2530
2531 Pos += 1 + Argument.size();
2532 }
2533 }
2534 }
2535 // Update the scan point.
2536 Body = Body.substr(Pos);
2537 }
2538
2539 return false;
2540}
2541
2542static bool isOperator(AsmToken::TokenKind kind) {
2543 switch (kind) {
2544 default:
2545 return false;
2546 case AsmToken::Plus:
2547 case AsmToken::Minus:
2548 case AsmToken::Tilde:
2549 case AsmToken::Slash:
2550 case AsmToken::Star:
2551 case AsmToken::Dot:
2552 case AsmToken::Equal:
2553 case AsmToken::EqualEqual:
2554 case AsmToken::Pipe:
2555 case AsmToken::PipePipe:
2556 case AsmToken::Caret:
2557 case AsmToken::Amp:
2558 case AsmToken::AmpAmp:
2559 case AsmToken::Exclaim:
2560 case AsmToken::ExclaimEqual:
2561 case AsmToken::Less:
2562 case AsmToken::LessEqual:
2563 case AsmToken::LessLess:
2564 case AsmToken::LessGreater:
2565 case AsmToken::Greater:
2566 case AsmToken::GreaterEqual:
2567 case AsmToken::GreaterGreater:
2568 return true;
2569 }
2570}
2571
2572namespace {
2573
2574class AsmLexerSkipSpaceRAII {
2575public:
2576 AsmLexerSkipSpaceRAII(AsmLexer &Lexer, bool SkipSpace) : Lexer(Lexer) {
2577 Lexer.setSkipSpace(SkipSpace);
2578 }
2579
2580 ~AsmLexerSkipSpaceRAII() {
2581 Lexer.setSkipSpace(true);
2582 }
2583
2584private:
2585 AsmLexer &Lexer;
2586};
2587
2588} // end anonymous namespace
2589
2590bool AsmParser::parseMacroArgument(MCAsmMacroArgument &MA, bool Vararg) {
2591
2592 if (Vararg) {
2593 if (Lexer.isNot(AsmToken::EndOfStatement)) {
2594 StringRef Str = parseStringToEndOfStatement();
2595 MA.emplace_back(AsmToken::String, Str);
2596 }
2597 return false;
2598 }
2599
2600 unsigned ParenLevel = 0;
2601
2602 // Darwin doesn't use spaces to delmit arguments.
2603 AsmLexerSkipSpaceRAII ScopedSkipSpace(Lexer, IsDarwin);
2604
2605 bool SpaceEaten;
2606
2607 while (true) {
2608 SpaceEaten = false;
2609 if (Lexer.is(AsmToken::Eof) || Lexer.is(AsmToken::Equal))
2610 return TokError("unexpected token in macro instantiation");
2611
2612 if (ParenLevel == 0) {
2613
2614 if (Lexer.is(AsmToken::Comma))
2615 break;
2616
2617 if (Lexer.is(AsmToken::Space)) {
2618 SpaceEaten = true;
2619 Lexer.Lex(); // Eat spaces
2620 }
2621
2622 // Spaces can delimit parameters, but could also be part an expression.
2623 // If the token after a space is an operator, add the token and the next
2624 // one into this argument
2625 if (!IsDarwin) {
2626 if (isOperator(Lexer.getKind())) {
2627 MA.push_back(getTok());
2628 Lexer.Lex();
2629
2630 // Whitespace after an operator can be ignored.
2631 if (Lexer.is(AsmToken::Space))
2632 Lexer.Lex();
2633
2634 continue;
2635 }
2636 }
2637 if (SpaceEaten)
2638 break;
2639 }
2640
2641 // handleMacroEntry relies on not advancing the lexer here
2642 // to be able to fill in the remaining default parameter values
2643 if (Lexer.is(AsmToken::EndOfStatement))
2644 break;
2645
2646 // Adjust the current parentheses level.
2647 if (Lexer.is(AsmToken::LParen))
2648 ++ParenLevel;
2649 else if (Lexer.is(AsmToken::RParen) && ParenLevel)
2650 --ParenLevel;
2651
2652 // Append the token to the current argument list.
2653 MA.push_back(getTok());
2654 Lexer.Lex();
2655 }
2656
2657 if (ParenLevel != 0)
2658 return TokError("unbalanced parentheses in macro argument");
2659 return false;
2660}
2661
2662// Parse the macro instantiation arguments.
2663bool AsmParser::parseMacroArguments(const MCAsmMacro *M,
2664 MCAsmMacroArguments &A) {
2665 const unsigned NParameters = M ? M->Parameters.size() : 0;
2666 bool NamedParametersFound = false;
2667 SmallVector<SMLoc, 4> FALocs;
2668
2669 A.resize(NParameters);
2670 FALocs.resize(NParameters);
2671
2672 // Parse two kinds of macro invocations:
2673 // - macros defined without any parameters accept an arbitrary number of them
2674 // - macros defined with parameters accept at most that many of them
2675 bool HasVararg = NParameters ? M->Parameters.back().Vararg : false;
2676 for (unsigned Parameter = 0; !NParameters || Parameter < NParameters;
2677 ++Parameter) {
2678 SMLoc IDLoc = Lexer.getLoc();
2679 MCAsmMacroParameter FA;
2680
2681 if (Lexer.is(AsmToken::Identifier) && Lexer.peekTok().is(AsmToken::Equal)) {
2682 if (parseIdentifier(FA.Name))
2683 return Error(IDLoc, "invalid argument identifier for formal argument");
2684
2685 if (Lexer.isNot(AsmToken::Equal))
2686 return TokError("expected '=' after formal parameter identifier");
2687
2688 Lex();
2689
2690 NamedParametersFound = true;
2691 }
2692 bool Vararg = HasVararg && Parameter == (NParameters - 1);
2693
2694 if (NamedParametersFound && FA.Name.empty())
2695 return Error(IDLoc, "cannot mix positional and keyword arguments");
2696
2697 SMLoc StrLoc = Lexer.getLoc();
2698 SMLoc EndLoc;
2699 if (AltMacroMode && Lexer.is(AsmToken::Percent)) {
2700 const MCExpr *AbsoluteExp;
2701 int64_t Value;
2702 /// Eat '%'
2703 Lex();
2704 if (parseExpression(AbsoluteExp, EndLoc))
2705 return false;
2706 if (!AbsoluteExp->evaluateAsAbsolute(Value,
2707 getStreamer().getAssemblerPtr()))
2708 return Error(StrLoc, "expected absolute expression");
2709 const char *StrChar = StrLoc.getPointer();
2710 const char *EndChar = EndLoc.getPointer();
2711 AsmToken newToken(AsmToken::Integer,
2712 StringRef(StrChar, EndChar - StrChar), Value);
2713 FA.Value.push_back(newToken);
2714 } else if (AltMacroMode && Lexer.is(AsmToken::Less) &&
2715 isAngleBracketString(StrLoc, EndLoc)) {
2716 const char *StrChar = StrLoc.getPointer();
2717 const char *EndChar = EndLoc.getPointer();
2718 jumpToLoc(EndLoc, CurBuffer);
2719 /// Eat from '<' to '>'
2720 Lex();
2721 AsmToken newToken(AsmToken::String,
2722 StringRef(StrChar, EndChar - StrChar));
2723 FA.Value.push_back(newToken);
2724 } else if(parseMacroArgument(FA.Value, Vararg))
2725 return true;
2726
2727 unsigned PI = Parameter;
2728 if (!FA.Name.empty()) {
2729 unsigned FAI = 0;
2730 for (FAI = 0; FAI < NParameters; ++FAI)
2731 if (M->Parameters[FAI].Name == FA.Name)
2732 break;
2733
2734 if (FAI >= NParameters) {
2735 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~++20210306111116+7ae191f59f0f/llvm/lib/MC/MCParser/AsmParser.cpp"
, 2735, __PRETTY_FUNCTION__))
;
2736 return Error(IDLoc, "parameter named '" + FA.Name +
2737 "' does not exist for macro '" + M->Name + "'");
2738 }
2739 PI = FAI;
2740 }
2741
2742 if (!FA.Value.empty()) {
2743 if (A.size() <= PI)
2744 A.resize(PI + 1);
2745 A[PI] = FA.Value;
2746
2747 if (FALocs.size() <= PI)
2748 FALocs.resize(PI + 1);
2749
2750 FALocs[PI] = Lexer.getLoc();
2751 }
2752
2753 // At the end of the statement, fill in remaining arguments that have
2754 // default values. If there aren't any, then the next argument is
2755 // required but missing
2756 if (Lexer.is(AsmToken::EndOfStatement)) {
2757 bool Failure = false;
2758 for (unsigned FAI = 0; FAI < NParameters; ++FAI) {
2759 if (A[FAI].empty()) {
2760 if (M->Parameters[FAI].Required) {
2761 Error(FALocs[FAI].isValid() ? FALocs[FAI] : Lexer.getLoc(),
2762 "missing value for required parameter "
2763 "'" + M->Parameters[FAI].Name + "' in macro '" + M->Name + "'");
2764 Failure = true;
2765 }
2766
2767 if (!M->Parameters[FAI].Value.empty())
2768 A[FAI] = M->Parameters[FAI].Value;
2769 }
2770 }
2771 return Failure;
2772 }
2773
2774 if (Lexer.is(AsmToken::Comma))
2775 Lex();
2776 }
2777
2778 return TokError("too many positional arguments");
2779}
2780
2781bool AsmParser::handleMacroEntry(const MCAsmMacro *M, SMLoc NameLoc) {
2782 // Arbitrarily limit macro nesting depth (default matches 'as'). We can
2783 // eliminate this, although we should protect against infinite loops.
2784 unsigned MaxNestingDepth = AsmMacroMaxNestingDepth;
2785 if (ActiveMacros.size() == MaxNestingDepth) {
2786 std::ostringstream MaxNestingDepthError;
2787 MaxNestingDepthError << "macros cannot be nested more than "
2788 << MaxNestingDepth << " levels deep."
2789 << " Use -asm-macro-max-nesting-depth to increase "
2790 "this limit.";
2791 return TokError(MaxNestingDepthError.str());
2792 }
2793
2794 MCAsmMacroArguments A;
2795 if (parseMacroArguments(M, A))
2796 return true;
2797
2798 // Macro instantiation is lexical, unfortunately. We construct a new buffer
2799 // to hold the macro body with substitutions.
2800 SmallString<256> Buf;
2801 StringRef Body = M->Body;
2802 raw_svector_ostream OS(Buf);
2803
2804 if (expandMacro(OS, Body, M->Parameters, A, true, getTok().getLoc()))
2805 return true;
2806
2807 // We include the .endmacro in the buffer as our cue to exit the macro
2808 // instantiation.
2809 OS << ".endmacro\n";
2810
2811 std::unique_ptr<MemoryBuffer> Instantiation =
2812 MemoryBuffer::getMemBufferCopy(OS.str(), "<instantiation>");
2813
2814 // Create the macro instantiation object and add to the current macro
2815 // instantiation stack.
2816 MacroInstantiation *MI = new MacroInstantiation{
2817 NameLoc, CurBuffer, getTok().getLoc(), TheCondStack.size()};
2818 ActiveMacros.push_back(MI);
2819
2820 ++NumOfMacroInstantiations;
2821
2822 // Jump to the macro instantiation and prime the lexer.
2823 CurBuffer = SrcMgr.AddNewSourceBuffer(std::move(Instantiation), SMLoc());
2824 Lexer.setBuffer(SrcMgr.getMemoryBuffer(CurBuffer)->getBuffer());
2825 Lex();
2826
2827 return false;
2828}
2829
2830void AsmParser::handleMacroExit() {
2831 // Jump to the EndOfStatement we should return to, and consume it.
2832 jumpToLoc(ActiveMacros.back()->ExitLoc, ActiveMacros.back()->ExitBuffer);
2833 Lex();
2834
2835 // Pop the instantiation entry.
2836 delete ActiveMacros.back();
2837 ActiveMacros.pop_back();
2838}
2839
2840bool AsmParser::parseAssignment(StringRef Name, bool allow_redef,
2841 bool NoDeadStrip) {
2842 MCSymbol *Sym;
2843 const MCExpr *Value;
2844 if (MCParserUtils::parseAssignmentExpression(Name, allow_redef, *this, Sym,
2845 Value))
2846 return true;
2847
2848 if (!Sym) {
2849 // In the case where we parse an expression starting with a '.', we will
2850 // not generate an error, nor will we create a symbol. In this case we
2851 // should just return out.
2852 return false;
2853 }
2854
2855 // Do the assignment.
2856 Out.emitAssignment(Sym, Value);
2857 if (NoDeadStrip)
2858 Out.emitSymbolAttribute(Sym, MCSA_NoDeadStrip);
2859
2860 return false;
2861}
2862
2863/// parseIdentifier:
2864/// ::= identifier
2865/// ::= string
2866bool AsmParser::parseIdentifier(StringRef &Res) {
2867 // The assembler has relaxed rules for accepting identifiers, in particular we
2868 // allow things like '.globl $foo' and '.def @feat.00', which would normally be
2869 // separate tokens. At this level, we have already lexed so we cannot (currently)
2870 // handle this as a context dependent token, instead we detect adjacent tokens
2871 // and return the combined identifier.
2872 if (Lexer.is(AsmToken::Dollar) || Lexer.is(AsmToken::At)) {
2873 SMLoc PrefixLoc = getLexer().getLoc();
2874
2875 // Consume the prefix character, and check for a following identifier.
2876
2877 AsmToken Buf[1];
2878 Lexer.peekTokens(Buf, false);
2879
2880 if (Buf[0].isNot(AsmToken::Identifier) && Buf[0].isNot(AsmToken::Integer))
2881 return true;
2882
2883 // We have a '$' or '@' followed by an identifier or integer token, make
2884 // sure they are adjacent.
2885 if (PrefixLoc.getPointer() + 1 != Buf[0].getLoc().getPointer())
2886 return true;
2887
2888 // eat $ or @
2889 Lexer.Lex(); // Lexer's Lex guarantees consecutive token.
2890 // Construct the joined identifier and consume the token.
2891 Res = StringRef(PrefixLoc.getPointer(), getTok().getString().size() + 1);
2892 Lex(); // Parser Lex to maintain invariants.
2893 return false;
2894 }
2895
2896 if (Lexer.isNot(AsmToken::Identifier) && Lexer.isNot(AsmToken::String))
2897 return true;
2898
2899 Res = getTok().getIdentifier();
2900
2901 Lex(); // Consume the identifier token.
2902
2903 return false;
2904}
2905
2906/// parseDirectiveSet:
2907/// ::= .equ identifier ',' expression
2908/// ::= .equiv identifier ',' expression
2909/// ::= .set identifier ',' expression
2910bool AsmParser::parseDirectiveSet(StringRef IDVal, bool allow_redef) {
2911 StringRef Name;
2912 if (check(parseIdentifier(Name), "expected identifier") ||
2913 parseToken(AsmToken::Comma) || parseAssignment(Name, allow_redef, true))
2914 return addErrorSuffix(" in '" + Twine(IDVal) + "' directive");
2915 return false;
2916}
2917
2918bool AsmParser::parseEscapedString(std::string &Data) {
2919 if (check(getTok().isNot(AsmToken::String), "expected string"))
2920 return true;
2921
2922 Data = "";
2923 StringRef Str = getTok().getStringContents();
2924 for (unsigned i = 0, e = Str.size(); i != e; ++i) {
2925 if (Str[i] != '\\') {
2926 Data += Str[i];
2927 continue;
2928 }
2929
2930 // Recognize escaped characters. Note that this escape semantics currently
2931 // loosely follows Darwin 'as'.
2932 ++i;
2933 if (i == e)
2934 return TokError("unexpected backslash at end of string");
2935
2936 // Recognize hex sequences similarly to GNU 'as'.
2937 if (Str[i] == 'x' || Str[i] == 'X') {
2938 size_t length = Str.size();
2939 if (i + 1 >= length || !isHexDigit(Str[i + 1]))
2940 return TokError("invalid hexadecimal escape sequence");
2941
2942 // Consume hex characters. GNU 'as' reads all hexadecimal characters and
2943 // then truncates to the lower 16 bits. Seems reasonable.
2944 unsigned Value = 0;
2945 while (i + 1 < length && isHexDigit(Str[i + 1]))
2946 Value = Value * 16 + hexDigitValue(Str[++i]);
2947
2948 Data += (unsigned char)(Value & 0xFF);
2949 continue;
2950 }
2951
2952 // Recognize octal sequences.
2953 if ((unsigned)(Str[i] - '0') <= 7) {
2954 // Consume up to three octal characters.
2955 unsigned Value = Str[i] - '0';
2956
2957 if (i + 1 != e && ((unsigned)(Str[i + 1] - '0')) <= 7) {
2958 ++i;
2959 Value = Value * 8 + (Str[i] - '0');
2960
2961 if (i + 1 != e && ((unsigned)(Str[i + 1] - '0')) <= 7) {
2962 ++i;
2963 Value = Value * 8 + (Str[i] - '0');
2964 }
2965 }
2966
2967 if (Value > 255)
2968 return TokError("invalid octal escape sequence (out of range)");
2969
2970 Data += (unsigned char)Value;
2971 continue;
2972 }
2973
2974 // Otherwise recognize individual escapes.
2975 switch (Str[i]) {
2976 default:
2977 // Just reject invalid escape sequences for now.
2978 return TokError("invalid escape sequence (unrecognized character)");
2979
2980 case 'b': Data += '\b'; break;
2981 case 'f': Data += '\f'; break;
2982 case 'n': Data += '\n'; break;
2983 case 'r': Data += '\r'; break;
2984 case 't': Data += '\t'; break;
2985 case '"': Data += '"'; break;
2986 case '\\': Data += '\\'; break;
2987 }
2988 }
2989
2990 Lex();
2991 return false;
2992}
2993
2994bool AsmParser::parseAngleBracketString(std::string &Data) {
2995 SMLoc EndLoc, StartLoc = getTok().getLoc();
2996 if (isAngleBracketString(StartLoc, EndLoc)) {
2997 const char *StartChar = StartLoc.getPointer() + 1;
2998 const char *EndChar = EndLoc.getPointer() - 1;
2999 jumpToLoc(EndLoc, CurBuffer);
3000 /// Eat from '<' to '>'
3001 Lex();
3002
3003 Data = angleBracketString(StringRef(StartChar, EndChar - StartChar));
3004 return false;
3005 }
3006 return true;
3007}
3008
3009/// parseDirectiveAscii:
3010// ::= .ascii [ "string"+ ( , "string"+ )* ]
3011/// ::= ( .asciz | .string ) [ "string" ( , "string" )* ]
3012bool AsmParser::parseDirectiveAscii(StringRef IDVal, bool ZeroTerminated) {
3013 auto parseOp = [&]() -> bool {
3014 std::string Data;
3015 if (checkForValidSection())
3016 return true;
3017 // Only support spaces as separators for .ascii directive for now. See the
3018 // discusssion at https://reviews.llvm.org/D91460 for more details.
3019 do {
3020 if (parseEscapedString(Data))
3021 return true;
3022 getStreamer().emitBytes(Data);
3023 } while (!ZeroTerminated && getTok().is(AsmToken::String));
3024 if (ZeroTerminated)
3025 getStreamer().emitBytes(StringRef("\0", 1));
3026 return false;
3027 };
3028
3029 if (parseMany(parseOp))
3030 return addErrorSuffix(" in '" + Twine(IDVal) + "' directive");
3031 return false;
3032}
3033
3034/// parseDirectiveReloc
3035/// ::= .reloc expression , identifier [ , expression ]
3036bool AsmParser::parseDirectiveReloc(SMLoc DirectiveLoc) {
3037 const MCExpr *Offset;
3038 const MCExpr *Expr = nullptr;
3039 SMLoc OffsetLoc = Lexer.getTok().getLoc();
3040
3041 if (parseExpression(Offset))
3042 return true;
3043 if (parseToken(AsmToken::Comma, "expected comma") ||
3044 check(getTok().isNot(AsmToken::Identifier), "expected relocation name"))
3045 return true;
3046
3047 SMLoc NameLoc = Lexer.getTok().getLoc();
3048 StringRef Name = Lexer.getTok().getIdentifier();
3049 Lex();
3050
3051 if (Lexer.is(AsmToken::Comma)) {
3052 Lex();
3053 SMLoc ExprLoc = Lexer.getLoc();
3054 if (parseExpression(Expr))
3055 return true;
3056
3057 MCValue Value;
3058 if (!Expr->evaluateAsRelocatable(Value, nullptr, nullptr))
3059 return Error(ExprLoc, "expression must be relocatable");
3060 }
3061
3062 if (parseToken(AsmToken::EndOfStatement,
3063 "unexpected token in .reloc directive"))
3064 return true;
3065
3066 const MCTargetAsmParser &MCT = getTargetParser();
3067 const MCSubtargetInfo &STI = MCT.getSTI();
3068 if (Optional<std::pair<bool, std::string>> Err =
3069 getStreamer().emitRelocDirective(*Offset, Name, Expr, DirectiveLoc,
3070 STI))
3071 return Error(Err->first ? NameLoc : OffsetLoc, Err->second);
3072
3073 return false;
3074}
3075
3076/// parseDirectiveValue
3077/// ::= (.byte | .short | ... ) [ expression (, expression)* ]
3078bool AsmParser::parseDirectiveValue(StringRef IDVal, unsigned Size) {
3079 auto parseOp = [&]() -> bool {
3080 const MCExpr *Value;
3081 SMLoc ExprLoc = getLexer().getLoc();
3082 if (checkForValidSection() || parseExpression(Value))
3083 return true;
3084 // Special case constant expressions to match code generator.
3085 if (const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Value)) {
3086 assert(Size <= 8 && "Invalid size")((Size <= 8 && "Invalid size") ? static_cast<void
> (0) : __assert_fail ("Size <= 8 && \"Invalid size\""
, "/build/llvm-toolchain-snapshot-13~++20210306111116+7ae191f59f0f/llvm/lib/MC/MCParser/AsmParser.cpp"
, 3086, __PRETTY_FUNCTION__))
;
3087 uint64_t IntValue = MCE->getValue();
3088 if (!isUIntN(8 * Size, IntValue) && !isIntN(8 * Size, IntValue))
3089 return Error(ExprLoc, "out of range literal value");
3090 getStreamer().emitIntValue(IntValue, Size);
3091 } else
3092 getStreamer().emitValue(Value, Size, ExprLoc);
3093 return false;
3094 };
3095
3096 if (parseMany(parseOp))
3097 return addErrorSuffix(" in '" + Twine(IDVal) + "' directive");
3098 return false;
3099}
3100
3101static bool parseHexOcta(AsmParser &Asm, uint64_t &hi, uint64_t &lo) {
3102 if (Asm.getTok().isNot(AsmToken::Integer) &&
3103 Asm.getTok().isNot(AsmToken::BigNum))
3104 return Asm.TokError("unknown token in expression");
3105 SMLoc ExprLoc = Asm.getTok().getLoc();
3106 APInt IntValue = Asm.getTok().getAPIntVal();
3107 Asm.Lex();
3108 if (!IntValue.isIntN(128))
3109 return Asm.Error(ExprLoc, "out of range literal value");
3110 if (!IntValue.isIntN(64)) {
3111 hi = IntValue.getHiBits(IntValue.getBitWidth() - 64).getZExtValue();
3112 lo = IntValue.getLoBits(64).getZExtValue();
3113 } else {
3114 hi = 0;
3115 lo = IntValue.getZExtValue();
3116 }
3117 return false;
3118}
3119
3120/// ParseDirectiveOctaValue
3121/// ::= .octa [ hexconstant (, hexconstant)* ]
3122
3123bool AsmParser::parseDirectiveOctaValue(StringRef IDVal) {
3124 auto parseOp = [&]() -> bool {
3125 if (checkForValidSection())
3126 return true;
3127 uint64_t hi, lo;
3128 if (parseHexOcta(*this, hi, lo))
3129 return true;
3130 if (MAI.isLittleEndian()) {
3131 getStreamer().emitInt64(lo);
3132 getStreamer().emitInt64(hi);
3133 } else {
3134 getStreamer().emitInt64(hi);
3135 getStreamer().emitInt64(lo);
3136 }
3137 return false;
3138 };
3139
3140 if (parseMany(parseOp))
3141 return addErrorSuffix(" in '" + Twine(IDVal) + "' directive");
3142 return false;
3143}
3144
3145bool AsmParser::parseRealValue(const fltSemantics &Semantics, APInt &Res) {
3146 // We don't truly support arithmetic on floating point expressions, so we
3147 // have to manually parse unary prefixes.
3148 bool IsNeg = false;
3149 if (getLexer().is(AsmToken::Minus)) {
3150 Lexer.Lex();
3151 IsNeg = true;
3152 } else if (getLexer().is(AsmToken::Plus))
3153 Lexer.Lex();
3154
3155 if (Lexer.is(AsmToken::Error))
3156 return TokError(Lexer.getErr());
3157 if (Lexer.isNot(AsmToken::Integer) && Lexer.isNot(AsmToken::Real) &&
3158 Lexer.isNot(AsmToken::Identifier))
3159 return TokError("unexpected token in directive");
3160
3161 // Convert to an APFloat.
3162 APFloat Value(Semantics);
3163 StringRef IDVal = getTok().getString();
3164 if (getLexer().is(AsmToken::Identifier)) {
3165 if (!IDVal.compare_lower("infinity") || !IDVal.compare_lower("inf"))
3166 Value = APFloat::getInf(Semantics);
3167 else if (!IDVal.compare_lower("nan"))
3168 Value = APFloat::getNaN(Semantics, false, ~0);
3169 else
3170 return TokError("invalid floating point literal");
3171 } else if (errorToBool(
3172 Value.convertFromString(IDVal, APFloat::rmNearestTiesToEven)
3173 .takeError()))
3174 return TokError("invalid floating point literal");
3175 if (IsNeg)
3176 Value.changeSign();
3177
3178 // Consume the numeric token.
3179 Lex();
3180
3181 Res = Value.bitcastToAPInt();
3182
3183 return false;
3184}
3185
3186/// parseDirectiveRealValue
3187/// ::= (.single | .double) [ expression (, expression)* ]
3188bool AsmParser::parseDirectiveRealValue(StringRef IDVal,
3189 const fltSemantics &Semantics) {
3190 auto parseOp = [&]() -> bool {
3191 APInt AsInt;
3192 if (checkForValidSection() || parseRealValue(Semantics, AsInt))
3193 return true;
3194 getStreamer().emitIntValue(AsInt.getLimitedValue(),
3195 AsInt.getBitWidth() / 8);
3196 return false;
3197 };
3198
3199 if (parseMany(parseOp))
3200 return addErrorSuffix(" in '" + Twine(IDVal) + "' directive");
3201 return false;
3202}
3203
3204/// parseDirectiveZero
3205/// ::= .zero expression
3206bool AsmParser::parseDirectiveZero() {
3207 SMLoc NumBytesLoc = Lexer.getLoc();
3208 const MCExpr *NumBytes;
3209 if (checkForValidSection() || parseExpression(NumBytes))
3210 return true;
3211
3212 int64_t Val = 0;
3213 if (getLexer().is(AsmToken::Comma)) {
3214 Lex();
3215 if (parseAbsoluteExpression(Val))
3216 return true;
3217 }
3218
3219 if (parseToken(AsmToken::EndOfStatement,
3220 "unexpected token in '.zero' directive"))
3221 return true;
3222 getStreamer().emitFill(*NumBytes, Val, NumBytesLoc);
3223
3224 return false;
3225}
3226
3227/// parseDirectiveFill
3228/// ::= .fill expression [ , expression [ , expression ] ]
3229bool AsmParser::parseDirectiveFill() {
3230 SMLoc NumValuesLoc = Lexer.getLoc();
3231 const MCExpr *NumValues;
3232 if (checkForValidSection() || parseExpression(NumValues))
3233 return true;
3234
3235 int64_t FillSize = 1;
3236 int64_t FillExpr = 0;
3237
3238 SMLoc SizeLoc, ExprLoc;
3239
3240 if (parseOptionalToken(AsmToken::Comma)) {
3241 SizeLoc = getTok().getLoc();
3242 if (parseAbsoluteExpression(FillSize))
3243 return true;
3244 if (parseOptionalToken(AsmToken::Comma)) {
3245 ExprLoc = getTok().getLoc();
3246 if (parseAbsoluteExpression(FillExpr))
3247 return true;
3248 }
3249 }
3250 if (parseToken(AsmToken::EndOfStatement,
3251 "unexpected token in '.fill' directive"))
3252 return true;
3253
3254 if (FillSize < 0) {
3255 Warning(SizeLoc, "'.fill' directive with negative size has no effect");
3256 return false;
3257 }
3258 if (FillSize > 8) {
3259 Warning(SizeLoc, "'.fill' directive with size greater than 8 has been truncated to 8");
3260 FillSize = 8;
3261 }
3262
3263 if (!isUInt<32>(FillExpr) && FillSize > 4)
3264 Warning(ExprLoc, "'.fill' directive pattern has been truncated to 32-bits");
3265
3266 getStreamer().emitFill(*NumValues, FillSize, FillExpr, NumValuesLoc);
3267
3268 return false;
3269}
3270
3271/// parseDirectiveOrg
3272/// ::= .org expression [ , expression ]
3273bool AsmParser::parseDirectiveOrg() {
3274 const MCExpr *Offset;
3275 SMLoc OffsetLoc = Lexer.getLoc();
3276 if (checkForValidSection() || parseExpression(Offset))
3277 return true;
3278
3279 // Parse optional fill expression.
3280 int64_t FillExpr = 0;
3281 if (parseOptionalToken(AsmToken::Comma))
3282 if (parseAbsoluteExpression(FillExpr))
3283 return addErrorSuffix(" in '.org' directive");
3284 if (parseToken(AsmToken::EndOfStatement))
3285 return addErrorSuffix(" in '.org' directive");
3286
3287 getStreamer().emitValueToOffset(Offset, FillExpr, OffsetLoc);
3288 return false;
3289}
3290
3291/// parseDirectiveAlign
3292/// ::= {.align, ...} expression [ , expression [ , expression ]]
3293bool AsmParser::parseDirectiveAlign(bool IsPow2, unsigned ValueSize) {
3294 SMLoc AlignmentLoc = getLexer().getLoc();
3295 int64_t Alignment;
3296 SMLoc MaxBytesLoc;
3297 bool HasFillExpr = false;
3298 int64_t FillExpr = 0;
3299 int64_t MaxBytesToFill = 0;
3300
3301 auto parseAlign = [&]() -> bool {
3302 if (parseAbsoluteExpression(Alignment))
3303 return true;
3304 if (parseOptionalToken(AsmToken::Comma)) {
3305 // The fill expression can be omitted while specifying a maximum number of
3306 // alignment bytes, e.g:
3307 // .align 3,,4
3308 if (getTok().isNot(AsmToken::Comma)) {
3309 HasFillExpr = true;
3310 if (parseAbsoluteExpression(FillExpr))
3311 return true;
3312 }
3313 if (parseOptionalToken(AsmToken::Comma))
3314 if (parseTokenLoc(MaxBytesLoc) ||
3315 parseAbsoluteExpression(MaxBytesToFill))
3316 return true;
3317 }
3318 return parseToken(AsmToken::EndOfStatement);
3319 };
3320
3321 if (checkForValidSection())
3322 return addErrorSuffix(" in directive");
3323 // Ignore empty '.p2align' directives for GNU-as compatibility
3324 if (IsPow2 && (ValueSize == 1) && getTok().is(AsmToken::EndOfStatement)) {
3325 Warning(AlignmentLoc, "p2align directive with no operand(s) is ignored");
3326 return parseToken(AsmToken::EndOfStatement);
3327 }
3328 if (parseAlign())
3329 return addErrorSuffix(" in directive");
3330
3331 // Always emit an alignment here even if we thrown an error.
3332 bool ReturnVal = false;
3333
3334 // Compute alignment in bytes.
3335 if (IsPow2) {
3336 // FIXME: Diagnose overflow.
3337 if (Alignment >= 32) {
3338 ReturnVal |= Error(AlignmentLoc, "invalid alignment value");
3339 Alignment = 31;
3340 }
3341
3342 Alignment = 1ULL << Alignment;
3343 } else {
3344 // Reject alignments that aren't either a power of two or zero,
3345 // for gas compatibility. Alignment of zero is silently rounded
3346 // up to one.
3347 if (Alignment == 0)
3348 Alignment = 1;
3349 if (!isPowerOf2_64(Alignment))
3350 ReturnVal |= Error(AlignmentLoc, "alignment must be a power of 2");
3351 if (!isUInt<32>(Alignment))
3352 ReturnVal |= Error(AlignmentLoc, "alignment must be smaller than 2**32");
3353 }
3354
3355 // Diagnose non-sensical max bytes to align.
3356 if (MaxBytesLoc.isValid()) {
3357 if (MaxBytesToFill < 1) {
3358 ReturnVal |= Error(MaxBytesLoc,
3359 "alignment directive can never be satisfied in this "
3360 "many bytes, ignoring maximum bytes expression");
3361 MaxBytesToFill = 0;
3362 }
3363
3364 if (MaxBytesToFill >= Alignment) {
3365 Warning(MaxBytesLoc, "maximum bytes expression exceeds alignment and "
3366 "has no effect");
3367 MaxBytesToFill = 0;
3368 }
3369 }
3370
3371 // Check whether we should use optimal code alignment for this .align
3372 // directive.
3373 const MCSection *Section = getStreamer().getCurrentSectionOnly();
3374 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~++20210306111116+7ae191f59f0f/llvm/lib/MC/MCParser/AsmParser.cpp"
, 3374, __PRETTY_FUNCTION__))
;
3375 bool UseCodeAlign = Section->UseCodeAlign();
3376 if ((!HasFillExpr || Lexer.getMAI().getTextAlignFillValue() == FillExpr) &&
3377 ValueSize == 1 && UseCodeAlign) {
3378 getStreamer().emitCodeAlignment(Alignment, MaxBytesToFill);
3379 } else {
3380 // FIXME: Target specific behavior about how the "extra" bytes are filled.
3381 getStreamer().emitValueToAlignment(Alignment, FillExpr, ValueSize,
3382 MaxBytesToFill);
3383 }
3384
3385 return ReturnVal;
3386}
3387
3388/// parseDirectiveFile
3389/// ::= .file filename
3390/// ::= .file number [directory] filename [md5 checksum] [source source-text]
3391bool AsmParser::parseDirectiveFile(SMLoc DirectiveLoc) {
3392 // FIXME: I'm not sure what this is.
3393 int64_t FileNumber = -1;
3394 if (getLexer().is(AsmToken::Integer)) {
3395 FileNumber = getTok().getIntVal();
3396 Lex();
3397
3398 if (FileNumber < 0)
3399 return TokError("negative file number");
3400 }
3401
3402 std::string Path;
3403
3404 // Usually the directory and filename together, otherwise just the directory.
3405 // Allow the strings to have escaped octal character sequence.
3406 if (check(getTok().isNot(AsmToken::String),
3407 "unexpected token in '.file' directive") ||
3408 parseEscapedString(Path))
3409 return true;
3410
3411 StringRef Directory;
3412 StringRef Filename;
3413 std::string FilenameData;
3414 if (getLexer().is(AsmToken::String)) {
3415 if (check(FileNumber == -1,
3416 "explicit path specified, but no file number") ||
3417 parseEscapedString(FilenameData))
3418 return true;
3419 Filename = FilenameData;
3420 Directory = Path;
3421 } else {
3422 Filename = Path;
3423 }
3424
3425 uint64_t MD5Hi, MD5Lo;
3426 bool HasMD5 = false;
3427
3428 Optional<StringRef> Source;
3429 bool HasSource = false;
3430 std::string SourceString;
3431
3432 while (!parseOptionalToken(AsmToken::EndOfStatement)) {
3433 StringRef Keyword;
3434 if (check(getTok().isNot(AsmToken::Identifier),
3435 "unexpected token in '.file' directive") ||
3436 parseIdentifier(Keyword))
3437 return true;
3438 if (Keyword == "md5") {
3439 HasMD5 = true;
3440 if (check(FileNumber == -1,
3441 "MD5 checksum specified, but no file number") ||
3442 parseHexOcta(*this, MD5Hi, MD5Lo))
3443 return true;
3444 } else if (Keyword == "source") {
3445 HasSource = true;
3446 if (check(FileNumber == -1,
3447 "source specified, but no file number") ||
3448 check(getTok().isNot(AsmToken::String),
3449 "unexpected token in '.file' directive") ||
3450 parseEscapedString(SourceString))
3451 return true;
3452 } else {
3453 return TokError("unexpected token in '.file' directive");
3454 }
3455 }
3456
3457 if (FileNumber == -1) {
3458 // Ignore the directive if there is no number and the target doesn't support
3459 // numberless .file directives. This allows some portability of assembler
3460 // between different object file formats.
3461 if (getContext().getAsmInfo()->hasSingleParameterDotFile())
3462 getStreamer().emitFileDirective(Filename);
3463 } else {
3464 // In case there is a -g option as well as debug info from directive .file,
3465 // we turn off the -g option, directly use the existing debug info instead.
3466 // Throw away any implicit file table for the assembler source.
3467 if (Ctx.getGenDwarfForAssembly()) {
3468 Ctx.getMCDwarfLineTable(0).resetFileTable();
3469 Ctx.setGenDwarfForAssembly(false);
3470 }
3471
3472 Optional<MD5::MD5Result> CKMem;
3473 if (HasMD5) {
3474 MD5::MD5Result Sum;
3475 for (unsigned i = 0; i != 8; ++i) {
3476 Sum.Bytes[i] = uint8_t(MD5Hi >> ((7 - i) * 8));
3477 Sum.Bytes[i + 8] = uint8_t(MD5Lo >> ((7 - i) * 8));
3478 }
3479 CKMem = Sum;
3480 }
3481 if (HasSource) {
3482 char *SourceBuf = static_cast<char *>(Ctx.allocate(SourceString.size()));
3483 memcpy(SourceBuf, SourceString.data(), SourceString.size());
3484 Source = StringRef(SourceBuf, SourceString.size());
3485 }
3486 if (FileNumber == 0) {
3487 // Upgrade to Version 5 for assembly actions like clang -c a.s.
3488 if (Ctx.getDwarfVersion() < 5)
3489 Ctx.setDwarfVersion(5);
3490 getStreamer().emitDwarfFile0Directive(Directory, Filename, CKMem, Source);
3491 } else {
3492 Expected<unsigned> FileNumOrErr = getStreamer().tryEmitDwarfFileDirective(
3493 FileNumber, Directory, Filename, CKMem, Source);
3494 if (!FileNumOrErr)
3495 return Error(DirectiveLoc, toString(FileNumOrErr.takeError()));
3496 }
3497 // Alert the user if there are some .file directives with MD5 and some not.
3498 // But only do that once.
3499 if (!ReportedInconsistentMD5 && !Ctx.isDwarfMD5UsageConsistent(0)) {
3500 ReportedInconsistentMD5 = true;
3501 return Warning(DirectiveLoc, "inconsistent use of MD5 checksums");
3502 }
3503 }
3504
3505 return false;
3506}
3507
3508/// parseDirectiveLine
3509/// ::= .line [number]
3510bool AsmParser::parseDirectiveLine() {
3511 int64_t LineNumber;
3512 if (getLexer().is(AsmToken::Integer)) {
3513 if (parseIntToken(LineNumber, "unexpected token in '.line' directive"))
3514 return true;
3515 (void)LineNumber;
3516 // FIXME: Do something with the .line.
3517 }
3518 if (parseToken(AsmToken::EndOfStatement,
3519 "unexpected token in '.line' directive"))
3520 return true;
3521
3522 return false;
3523}
3524
3525/// parseDirectiveLoc
3526/// ::= .loc FileNumber [LineNumber] [ColumnPos] [basic_block] [prologue_end]
3527/// [epilogue_begin] [is_stmt VALUE] [isa VALUE]
3528/// The first number is a file number, must have been previously assigned with
3529/// a .file directive, the second number is the line number and optionally the
3530/// third number is a column position (zero if not specified). The remaining
3531/// optional items are .loc sub-directives.
3532bool AsmParser::parseDirectiveLoc() {
3533 int64_t FileNumber = 0, LineNumber = 0;
3534 SMLoc Loc = getTok().getLoc();
3535 if (parseIntToken(FileNumber, "unexpected token in '.loc' directive") ||
3536 check(FileNumber < 1 && Ctx.getDwarfVersion() < 5, Loc,
3537 "file number less than one in '.loc' directive") ||
3538 check(!getContext().isValidDwarfFileNumber(FileNumber), Loc,
3539 "unassigned file number in '.loc' directive"))
3540 return true;
3541
3542 // optional
3543 if (getLexer().is(AsmToken::Integer)) {
3544 LineNumber = getTok().getIntVal();
3545 if (LineNumber < 0)
3546 return TokError("line number less than zero in '.loc' directive");
3547 Lex();
3548 }
3549
3550 int64_t ColumnPos = 0;
3551 if (getLexer().is(AsmToken::Integer)) {
3552 ColumnPos = getTok().getIntVal();
3553 if (ColumnPos < 0)
3554 return TokError("column position less than zero in '.loc' directive");
3555 Lex();
3556 }
3557
3558 auto PrevFlags = getContext().getCurrentDwarfLoc().getFlags();
3559 unsigned Flags = PrevFlags & DWARF2_FLAG_IS_STMT(1 << 0);
3560 unsigned Isa = 0;
3561 int64_t Discriminator = 0;
3562
3563 auto parseLocOp = [&]() -> bool {
3564 StringRef Name;
3565 SMLoc Loc = getTok().getLoc();
3566 if (parseIdentifier(Name))
3567 return TokError("unexpected token in '.loc' directive");
3568
3569 if (Name == "basic_block")
3570 Flags |= DWARF2_FLAG_BASIC_BLOCK(1 << 1);
3571 else if (Name == "prologue_end")
3572 Flags |= DWARF2_FLAG_PROLOGUE_END(1 << 2);
3573 else if (Name == "epilogue_begin")
3574 Flags |= DWARF2_FLAG_EPILOGUE_BEGIN(1 << 3);
3575 else if (Name == "is_stmt") {
3576 Loc = getTok().getLoc();
3577 const MCExpr *Value;
3578 if (parseExpression(Value))
3579 return true;
3580 // The expression must be the constant 0 or 1.
3581 if (const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Value)) {
3582 int Value = MCE->getValue();
3583 if (Value == 0)
3584 Flags &= ~DWARF2_FLAG_IS_STMT(1 << 0);
3585 else if (Value == 1)
3586 Flags |= DWARF2_FLAG_IS_STMT(1 << 0);
3587 else
3588 return Error(Loc, "is_stmt value not 0 or 1");
3589 } else {
3590 return Error(Loc, "is_stmt value not the constant value of 0 or 1");
3591 }
3592 } else if (Name == "isa") {
3593 Loc = getTok().getLoc();
3594 const MCExpr *Value;
3595 if (parseExpression(Value))
3596 return true;
3597 // The expression must be a constant greater or equal to 0.
3598 if (const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Value)) {
3599 int Value = MCE->getValue();
3600 if (Value < 0)
3601 return Error(Loc, "isa number less than zero");
3602 Isa = Value;
3603 } else {
3604 return Error(Loc, "isa number not a constant value");
3605 }
3606 } else if (Name == "discriminator") {
3607 if (parseAbsoluteExpression(Discriminator))
3608 return true;
3609 } else {
3610 return Error(Loc, "unknown sub-directive in '.loc' directive");
3611 }
3612 return false;
3613 };
3614
3615 if (parseMany(parseLocOp, false /*hasComma*/))
3616 return true;
3617
3618 getStreamer().emitDwarfLocDirective(FileNumber, LineNumber, ColumnPos, Flags,
3619 Isa, Discriminator, StringRef());
3620
3621 return false;
3622}
3623
3624/// parseDirectiveStabs
3625/// ::= .stabs string, number, number, number
3626bool AsmParser::parseDirectiveStabs() {
3627 return TokError("unsupported directive '.stabs'");
3628}
3629
3630/// parseDirectiveCVFile
3631/// ::= .cv_file number filename [checksum] [checksumkind]
3632bool AsmParser::parseDirectiveCVFile() {
3633 SMLoc FileNumberLoc = getTok().getLoc();
3634 int64_t FileNumber;
3635 std::string Filename;
3636 std::string Checksum;
3637 int64_t ChecksumKind = 0;
3638
3639 if (parseIntToken(FileNumber,
3640 "expected file number in '.cv_file' directive") ||
3641 check(FileNumber < 1, FileNumberLoc, "file number less than one") ||
3642 check(getTok().isNot(AsmToken::String),
3643 "unexpected token in '.cv_file' directive") ||
3644 parseEscapedString(Filename))
3645 return true;
3646 if (!parseOptionalToken(AsmToken::EndOfStatement)) {
3647 if (check(getTok().isNot(AsmToken::String),
3648 "unexpected token in '.cv_file' directive") ||
3649 parseEscapedString(Checksum) ||
3650 parseIntToken(ChecksumKind,
3651 "expected checksum kind in '.cv_file' directive") ||
3652 parseToken(AsmToken::EndOfStatement,
3653 "unexpected token in '.cv_file' directive"))
3654 return true;
3655 }
3656
3657 Checksum = fromHex(Checksum);
3658 void *CKMem = Ctx.allocate(Checksum.size(), 1);
3659 memcpy(CKMem, Checksum.data(), Checksum.size());
3660 ArrayRef<uint8_t> ChecksumAsBytes(reinterpret_cast<const uint8_t *>(CKMem),
3661 Checksum.size());
3662
3663 if (!getStreamer().EmitCVFileDirective(FileNumber, Filename, ChecksumAsBytes,
3664 static_cast<uint8_t>(ChecksumKind)))
3665 return Error(FileNumberLoc, "file number already allocated");
3666
3667 return false;
3668}
3669
3670bool AsmParser::parseCVFunctionId(int64_t &FunctionId,
3671 StringRef DirectiveName) {
3672 SMLoc Loc;
3673 return parseTokenLoc(Loc) ||
3674 parseIntToken(FunctionId, "expected function id in '" + DirectiveName +
3675 "' directive") ||
3676 check(FunctionId < 0 || FunctionId >= UINT_MAX(2147483647 *2U +1U), Loc,
3677 "expected function id within range [0, UINT_MAX)");
3678}
3679
3680bool AsmParser::parseCVFileId(int64_t &FileNumber, StringRef DirectiveName) {
3681 SMLoc Loc;
3682 return parseTokenLoc(Loc) ||
3683 parseIntToken(FileNumber, "expected integer in '" + DirectiveName +
3684 "' directive") ||
3685 check(FileNumber < 1, Loc, "file number less than one in '" +
3686 DirectiveName + "' directive") ||
3687 check(!getCVContext().isValidFileNumber(FileNumber), Loc,
3688 "unassigned file number in '" + DirectiveName + "' directive");
3689}
3690
3691/// parseDirectiveCVFuncId
3692/// ::= .cv_func_id FunctionId
3693///
3694/// Introduces a function ID that can be used with .cv_loc.
3695bool AsmParser::parseDirectiveCVFuncId() {
3696 SMLoc FunctionIdLoc = getTok().getLoc();
3697 int64_t FunctionId;
3698
3699 if (parseCVFunctionId(FunctionId, ".cv_func_id") ||
3700 parseToken(AsmToken::EndOfStatement,
3701 "unexpected token in '.cv_func_id' directive"))
3702 return true;
3703
3704 if (!getStreamer().EmitCVFuncIdDirective(FunctionId))
3705 return Error(FunctionIdLoc, "function id already allocated");
3706
3707 return false;
3708}
3709
3710/// parseDirectiveCVInlineSiteId
3711/// ::= .cv_inline_site_id FunctionId
3712/// "within" IAFunc
3713/// "inlined_at" IAFile IALine [IACol]
3714///
3715/// Introduces a function ID that can be used with .cv_loc. Includes "inlined
3716/// at" source location information for use in the line table of the caller,
3717/// whether the caller is a real function or another inlined call site.
3718bool AsmParser::parseDirectiveCVInlineSiteId() {
3719 SMLoc FunctionIdLoc = getTok().getLoc();
3720 int64_t FunctionId;
3721 int64_t IAFunc;
3722 int64_t IAFile;
3723 int64_t IALine;
3724 int64_t IACol = 0;
3725
3726 // FunctionId
3727 if (parseCVFunctionId(FunctionId, ".cv_inline_site_id"))
3728 return true;
3729
3730 // "within"
3731 if (check((getLexer().isNot(AsmToken::Identifier) ||
3732 getTok().getIdentifier() != "within"),
3733 "expected 'within' identifier in '.cv_inline_site_id' directive"))
3734 return true;
3735 Lex();
3736
3737 // IAFunc
3738 if (parseCVFunctionId(IAFunc, ".cv_inline_site_id"))
3739 return true;
3740
3741 // "inlined_at"
3742 if (check((getLexer().isNot(AsmToken::Identifier) ||
3743 getTok().getIdentifier() != "inlined_at"),
3744 "expected 'inlined_at' identifier in '.cv_inline_site_id' "
3745 "directive") )
3746 return true;
3747 Lex();
3748
3749 // IAFile IALine
3750 if (parseCVFileId(IAFile, ".cv_inline_site_id") ||
3751 parseIntToken(IALine, "expected line number after 'inlined_at'"))
3752 return true;
3753
3754 // [IACol]
3755 if (getLexer().is(AsmToken::Integer)) {
3756 IACol = getTok().getIntVal();
3757 Lex();
3758 }
3759
3760 if (parseToken(AsmToken::EndOfStatement,
3761 "unexpected token in '.cv_inline_site_id' directive"))
3762 return true;
3763
3764 if (!getStreamer().EmitCVInlineSiteIdDirective(FunctionId, IAFunc, IAFile,
3765 IALine, IACol, FunctionIdLoc))
3766 return Error(FunctionIdLoc, "function id already allocated");
3767
3768 return false;
3769}
3770
3771/// parseDirectiveCVLoc
3772/// ::= .cv_loc FunctionId FileNumber [LineNumber] [ColumnPos] [prologue_end]
3773/// [is_stmt VALUE]
3774/// The first number is a file number, must have been previously assigned with
3775/// a .file directive, the second number is the line number and optionally the
3776/// third number is a column position (zero if not specified). The remaining
3777/// optional items are .loc sub-directives.
3778bool AsmParser::parseDirectiveCVLoc() {
3779 SMLoc DirectiveLoc = getTok().getLoc();
3780 int64_t FunctionId, FileNumber;
3781 if (parseCVFunctionId(FunctionId, ".cv_loc") ||
3782 parseCVFileId(FileNumber, ".cv_loc"))
3783 return true;
3784
3785 int64_t LineNumber = 0;
3786 if (getLexer().is(AsmToken::Integer)) {
3787 LineNumber = getTok().getIntVal();
3788 if (LineNumber < 0)
3789 return TokError("line number less than zero in '.cv_loc' directive");
3790 Lex();
3791 }
3792
3793 int64_t ColumnPos = 0;
3794 if (getLexer().is(AsmToken::Integer)) {
3795 ColumnPos = getTok().getIntVal();
3796 if (ColumnPos < 0)
3797 return TokError("column position less than zero in '.cv_loc' directive");
3798 Lex();
3799 }
3800
3801 bool PrologueEnd = false;
3802 uint64_t IsStmt = 0;
3803
3804 auto parseOp = [&]() -> bool {
3805 StringRef Name;
3806 SMLoc Loc = getTok().getLoc();
3807 if (parseIdentifier(Name))
3808 return TokError("unexpected token in '.cv_loc' directive");
3809 if (Name == "prologue_end")
3810 PrologueEnd = true;
3811 else if (Name == "is_stmt") {
3812 Loc = getTok().getLoc();
3813 const MCExpr *Value;
3814 if (parseExpression(Value))
3815 return true;
3816 // The expression must be the constant 0 or 1.
3817 IsStmt = ~0ULL;
3818 if (const auto *MCE = dyn_cast<MCConstantExpr>(Value))
3819 IsStmt = MCE->getValue();
3820
3821 if (IsStmt > 1)
3822 return Error(Loc, "is_stmt value not 0 or 1");
3823 } else {
3824 return Error(Loc, "unknown sub-directive in '.cv_loc' directive");
3825 }
3826 return false;
3827 };
3828
3829 if (parseMany(parseOp, false /*hasComma*/))
3830 return true;
3831
3832 getStreamer().emitCVLocDirective(FunctionId, FileNumber, LineNumber,
3833 ColumnPos, PrologueEnd, IsStmt, StringRef(),
3834 DirectiveLoc);
3835 return false;
3836}
3837
3838/// parseDirectiveCVLinetable
3839/// ::= .cv_linetable FunctionId, FnStart, FnEnd
3840bool AsmParser::parseDirectiveCVLinetable() {
3841 int64_t FunctionId;
3842 StringRef FnStartName, FnEndName;
3843 SMLoc Loc = getTok().getLoc();
3844 if (parseCVFunctionId(FunctionId, ".cv_linetable") ||
3845 parseToken(AsmToken::Comma,
3846 "unexpected token in '.cv_linetable' directive") ||
3847 parseTokenLoc(Loc) || check(parseIdentifier(FnStartName), Loc,
3848 "expected identifier in directive") ||
3849 parseToken(AsmToken::Comma,
3850 "unexpected token in '.cv_linetable' directive") ||
3851 parseTokenLoc(Loc) || check(parseIdentifier(FnEndName), Loc,
3852 "expected identifier in directive"))
3853 return true;
3854
3855 MCSymbol *FnStartSym = getContext().getOrCreateSymbol(FnStartName);
3856 MCSymbol *FnEndSym = getContext().getOrCreateSymbol(FnEndName);
3857
3858 getStreamer().emitCVLinetableDirective(FunctionId, FnStartSym, FnEndSym);
3859 return false;
3860}
3861
3862/// parseDirectiveCVInlineLinetable
3863/// ::= .cv_inline_linetable PrimaryFunctionId FileId LineNum FnStart FnEnd
3864bool AsmParser::parseDirectiveCVInlineLinetable() {
3865 int64_t PrimaryFunctionId, SourceFileId, SourceLineNum;
3866 StringRef FnStartName, FnEndName;
3867 SMLoc Loc = getTok().getLoc();
3868 if (parseCVFunctionId(PrimaryFunctionId, ".cv_inline_linetable") ||
3869 parseTokenLoc(Loc) ||
3870 parseIntToken(
3871 SourceFileId,
3872 "expected SourceField in '.cv_inline_linetable' directive") ||
3873 check(SourceFileId <= 0, Loc,
3874 "File id less than zero in '.cv_inline_linetable' directive") ||
3875 parseTokenLoc(Loc) ||
3876 parseIntToken(
3877 SourceLineNum,
3878 "expected SourceLineNum in '.cv_inline_linetable' directive") ||
3879 check(SourceLineNum < 0, Loc,
3880 "Line number less than zero in '.cv_inline_linetable' directive") ||
3881 parseTokenLoc(Loc) || check(parseIdentifier(FnStartName), Loc,
3882 "expected identifier in directive") ||
3883 parseTokenLoc(Loc) || check(parseIdentifier(FnEndName), Loc,
3884 "expected identifier in directive"))
3885 return true;
3886
3887 if (parseToken(AsmToken::EndOfStatement, "Expected End of Statement"))
3888 return true;
3889
3890 MCSymbol *FnStartSym = getContext().getOrCreateSymbol(FnStartName);
3891 MCSymbol *FnEndSym = getContext().getOrCreateSymbol(FnEndName);
3892 getStreamer().emitCVInlineLinetableDirective(PrimaryFunctionId, SourceFileId,
3893 SourceLineNum, FnStartSym,
3894 FnEndSym);
3895 return false;
3896}
3897
3898void AsmParser::initializeCVDefRangeTypeMap() {
3899 CVDefRangeTypeMap["reg"] = CVDR_DEFRANGE_REGISTER;
3900 CVDefRangeTypeMap["frame_ptr_rel"] = CVDR_DEFRANGE_FRAMEPOINTER_REL;
3901 CVDefRangeTypeMap["subfield_reg"] = CVDR_DEFRANGE_SUBFIELD_REGISTER;
3902 CVDefRangeTypeMap["reg_rel"] = CVDR_DEFRANGE_REGISTER_REL;
3903}
3904
3905/// parseDirectiveCVDefRange
3906/// ::= .cv_def_range RangeStart RangeEnd (GapStart GapEnd)*, bytes*
3907bool AsmParser::parseDirectiveCVDefRange() {
3908 SMLoc Loc;
3909 std::vector<std::pair<const MCSymbol *, const MCSymbol *>> Ranges;
3910 while (getLexer().is(AsmToken::Identifier)) {
3911 Loc = getLexer().getLoc();
3912 StringRef GapStartName;
3913 if (parseIdentifier(GapStartName))
3914 return Error(Loc, "expected identifier in directive");
3915 MCSymbol *GapStartSym = getContext().getOrCreateSymbol(GapStartName);
3916
3917 Loc = getLexer().getLoc();
3918 StringRef GapEndName;
3919 if (parseIdentifier(GapEndName))
3920 return Error(Loc, "expected identifier in directive");
3921 MCSymbol *GapEndSym = getContext().getOrCreateSymbol(GapEndName);
3922
3923 Ranges.push_back({GapStartSym, GapEndSym});
3924 }
3925
3926 StringRef CVDefRangeTypeStr;
3927 if (parseToken(
3928 AsmToken::Comma,
3929 "expected comma before def_range type in .cv_def_range directive") ||
3930 parseIdentifier(CVDefRangeTypeStr))
3931 return Error(Loc, "expected def_range type in directive");
3932
3933 StringMap<CVDefRangeType>::const_iterator CVTypeIt =
3934 CVDefRangeTypeMap.find(CVDefRangeTypeStr);
3935 CVDefRangeType CVDRType = (CVTypeIt == CVDefRangeTypeMap.end())
3936 ? CVDR_DEFRANGE
3937 : CVTypeIt->getValue();
3938 switch (CVDRType) {
3939 case CVDR_DEFRANGE_REGISTER: {
3940 int64_t DRRegister;
3941 if (parseToken(AsmToken::Comma, "expected comma before register number in "
3942 ".cv_def_range directive") ||
3943 parseAbsoluteExpression(DRRegister))
3944 return Error(Loc, "expected register number");
3945
3946 codeview::DefRangeRegisterHeader DRHdr;
3947 DRHdr.Register = DRRegister;
3948 DRHdr.MayHaveNoName = 0;
3949 getStreamer().emitCVDefRangeDirective(Ranges, DRHdr);
3950 break;
3951 }
3952 case CVDR_DEFRANGE_FRAMEPOINTER_REL: {
3953 int64_t DROffset;
3954 if (parseToken(AsmToken::Comma,
3955 "expected comma before offset in .cv_def_range directive") ||
3956 parseAbsoluteExpression(DROffset))
3957 return Error(Loc, "expected offset value");
3958
3959 codeview::DefRangeFramePointerRelHeader DRHdr;
3960 DRHdr.Offset = DROffset;
3961 getStreamer().emitCVDefRangeDirective(Ranges, DRHdr);
3962 break;
3963 }
3964 case CVDR_DEFRANGE_SUBFIELD_REGISTER: {
3965 int64_t DRRegister;
3966 int64_t DROffsetInParent;
3967 if (parseToken(AsmToken::Comma, "expected comma before register number in "
3968 ".cv_def_range directive") ||
3969 parseAbsoluteExpression(DRRegister))
3970 return Error(Loc, "expected register number");
3971 if (parseToken(AsmToken::Comma,
3972 "expected comma before offset in .cv_def_range directive") ||
3973 parseAbsoluteExpression(DROffsetInParent))
3974 return Error(Loc, "expected offset value");
3975
3976 codeview::DefRangeSubfieldRegisterHeader DRHdr;
3977 DRHdr.Register = DRRegister;
3978 DRHdr.MayHaveNoName = 0;
3979 DRHdr.OffsetInParent = DROffsetInParent;
3980 getStreamer().emitCVDefRangeDirective(Ranges, DRHdr);
3981 break;
3982 }
3983 case CVDR_DEFRANGE_REGISTER_REL: {
3984 int64_t DRRegister;
3985 int64_t DRFlags;
3986 int64_t DRBasePointerOffset;
3987 if (parseToken(AsmToken::Comma, "expected comma before register number in "
3988 ".cv_def_range directive") ||
3989 parseAbsoluteExpression(DRRegister))
3990 return Error(Loc, "expected register value");
3991 if (parseToken(
3992 AsmToken::Comma,
3993 "expected comma before flag value in .cv_def_range directive") ||
3994 parseAbsoluteExpression(DRFlags))
3995 return Error(Loc, "expected flag value");
3996 if (parseToken(AsmToken::Comma, "expected comma before base pointer offset "
3997 "in .cv_def_range directive") ||
3998 parseAbsoluteExpression(DRBasePointerOffset))
3999 return Error(Loc, "expected base pointer offset value");
4000
4001 codeview::DefRangeRegisterRelHeader DRHdr;
4002 DRHdr.Register = DRRegister;
4003 DRHdr.Flags = DRFlags;
4004 DRHdr.BasePointerOffset = DRBasePointerOffset;
4005 getStreamer().emitCVDefRangeDirective(Ranges, DRHdr);
4006 break;
4007 }
4008 default:
4009 return Error(Loc, "unexpected def_range type in .cv_def_range directive");
4010 }
4011 return true;
4012}
4013
4014/// parseDirectiveCVString
4015/// ::= .cv_stringtable "string"
4016bool AsmParser::parseDirectiveCVString() {
4017 std::string Data;
4018 if (checkForValidSection() || parseEscapedString(Data))
4019 return addErrorSuffix(" in '.cv_string' directive");
4020
4021 // Put the string in the table and emit the offset.
4022 std::pair<StringRef, unsigned> Insertion =
4023 getCVContext().addToStringTable(Data);
4024 getStreamer().emitInt32(Insertion.second);
4025 return false;
4026}
4027
4028/// parseDirectiveCVStringTable
4029/// ::= .cv_stringtable
4030bool AsmParser::parseDirectiveCVStringTable() {
4031 getStreamer().emitCVStringTableDirective();
4032 return false;
4033}
4034
4035/// parseDirectiveCVFileChecksums
4036/// ::= .cv_filechecksums
4037bool AsmParser::parseDirectiveCVFileChecksums() {
4038 getStreamer().emitCVFileChecksumsDirective();
4039 return false;
4040}
4041
4042/// parseDirectiveCVFileChecksumOffset
4043/// ::= .cv_filechecksumoffset fileno
4044bool AsmParser::parseDirectiveCVFileChecksumOffset() {
4045 int64_t FileNo;
4046 if (parseIntToken(FileNo, "expected identifier in directive"))
4047 return true;
4048 if (parseToken(AsmToken::EndOfStatement, "Expected End of Statement"))
4049 return true;
4050 getStreamer().emitCVFileChecksumOffsetDirective(FileNo);
4051 return false;
4052}
4053
4054/// parseDirectiveCVFPOData
4055/// ::= .cv_fpo_data procsym
4056bool AsmParser::parseDirectiveCVFPOData() {
4057 SMLoc DirLoc = getLexer().getLoc();
4058 StringRef ProcName;
4059 if (parseIdentifier(ProcName))
4060 return TokError("expected symbol name");
4061 if (parseEOL("unexpected tokens"))
4062 return addErrorSuffix(" in '.cv_fpo_data' directive");
4063 MCSymbol *ProcSym = getContext().getOrCreateSymbol(ProcName);
4064 getStreamer().EmitCVFPOData(ProcSym, DirLoc);
4065 return false;
4066}
4067
4068/// parseDirectiveCFISections
4069/// ::= .cfi_sections section [, section]
4070bool AsmParser::parseDirectiveCFISections() {
4071 StringRef Name;
4072 bool EH = false;
4073 bool Debug = false;
4074
4075 if (!parseOptionalToken(AsmToken::EndOfStatement)) {
4076 for (;;) {
4077 if (parseIdentifier(Name))
4078 return TokError("expected .eh_frame or .debug_frame");
4079 if (Name == ".eh_frame")
4080 EH = true;
4081 else if (Name == ".debug_frame")
4082 Debug = true;
4083 if (parseOptionalToken(AsmToken::EndOfStatement))
4084 break;
4085 if (parseToken(AsmToken::Comma))
4086 return true;
4087 }
4088 }
4089 getStreamer().emitCFISections(EH, Debug);
4090 return false;
4091}
4092
4093/// parseDirectiveCFIStartProc
4094/// ::= .cfi_startproc [simple]
4095bool AsmParser::parseDirectiveCFIStartProc() {
4096 StringRef Simple;
4097 if (!parseOptionalToken(AsmToken::EndOfStatement)) {
4098 if (check(parseIdentifier(Simple) || Simple != "simple",
4099 "unexpected token") ||
4100 parseToken(AsmToken::EndOfStatement))
4101 return addErrorSuffix(" in '.cfi_startproc' directive");
4102 }
4103
4104 // TODO(kristina): Deal with a corner case of incorrect diagnostic context
4105 // being produced if this directive is emitted as part of preprocessor macro
4106 // expansion which can *ONLY* happen if Clang's cc1as is the API consumer.
4107 // Tools like llvm-mc on the other hand are not affected by it, and report
4108 // correct context information.
4109 getStreamer().emitCFIStartProc(!Simple.empty(), Lexer.getLoc());
4110 return false;
4111}
4112
4113/// parseDirectiveCFIEndProc
4114/// ::= .cfi_endproc
4115bool AsmParser::parseDirectiveCFIEndProc() {
4116 if (parseToken(AsmToken::EndOfStatement))
4117 return addErrorSuffix(" in '.cfi_endproc' directive");
4118 getStreamer().emitCFIEndProc();
4119 return false;
4120}
4121
4122/// parse register name or number.
4123bool AsmParser::parseRegisterOrRegisterNumber(int64_t &Register,
4124 SMLoc DirectiveLoc) {
4125 unsigned RegNo;
4126
4127 if (getLexer().isNot(AsmToken::Integer)) {
4128 if (getTargetParser().ParseRegister(RegNo, DirectiveLoc, DirectiveLoc))
4129 return true;
4130 Register = getContext().getRegisterInfo()->getDwarfRegNum(RegNo, true);
4131 } else
4132 return parseAbsoluteExpression(Register);
4133
4134 return false;
4135}
4136
4137/// parseDirectiveCFIDefCfa
4138/// ::= .cfi_def_cfa register, offset
4139bool AsmParser::parseDirectiveCFIDefCfa(SMLoc DirectiveLoc) {
4140 int64_t Register = 0, Offset = 0;
4141 if (parseRegisterOrRegisterNumber(Register, DirectiveLoc) ||
4142 parseToken(AsmToken::Comma, "unexpected token in directive") ||
4143 parseAbsoluteExpression(Offset))
4144 return true;
4145
4146 getStreamer().emitCFIDefCfa(Register, Offset);
4147 return false;
4148}
4149
4150/// parseDirectiveCFIDefCfaOffset
4151/// ::= .cfi_def_cfa_offset offset
4152bool AsmParser::parseDirectiveCFIDefCfaOffset() {
4153 int64_t Offset = 0;
4154 if (parseAbsoluteExpression(Offset))
4155 return true;
4156
4157 getStreamer().emitCFIDefCfaOffset(Offset);
4158 return false;
4159}
4160
4161/// parseDirectiveCFIRegister
4162/// ::= .cfi_register register, register
4163bool AsmParser::parseDirectiveCFIRegister(SMLoc DirectiveLoc) {
4164 int64_t Register1 = 0, Register2 = 0;
4165 if (parseRegisterOrRegisterNumber(Register1, DirectiveLoc) ||
4166 parseToken(AsmToken::Comma, "unexpected token in directive") ||
4167 parseRegisterOrRegisterNumber(Register2, DirectiveLoc))
4168 return true;
4169
4170 getStreamer().emitCFIRegister(Register1, Register2);
4171 return false;
4172}
4173
4174/// parseDirectiveCFIWindowSave
4175/// ::= .cfi_window_save
4176bool AsmParser::parseDirectiveCFIWindowSave() {
4177 getStreamer().emitCFIWindowSave();
4178 return false;
4179}
4180
4181/// parseDirectiveCFIAdjustCfaOffset
4182/// ::= .cfi_adjust_cfa_offset adjustment
4183bool AsmParser::parseDirectiveCFIAdjustCfaOffset() {
4184 int64_t Adjustment = 0;
4185 if (parseAbsoluteExpression(Adjustment))
4186 return true;
4187
4188 getStreamer().emitCFIAdjustCfaOffset(Adjustment);
4189 return false;
4190}
4191
4192/// parseDirectiveCFIDefCfaRegister
4193/// ::= .cfi_def_cfa_register register
4194bool AsmParser::parseDirectiveCFIDefCfaRegister(SMLoc DirectiveLoc) {
4195 int64_t Register = 0;
4196 if (parseRegisterOrRegisterNumber(Register, DirectiveLoc))
4197 return true;
4198
4199 getStreamer().emitCFIDefCfaRegister(Register);
4200 return false;
4201}
4202
4203/// parseDirectiveCFIOffset
4204/// ::= .cfi_offset register, offset
4205bool AsmParser::parseDirectiveCFIOffset(SMLoc DirectiveLoc) {
4206 int64_t Register = 0;
4207 int64_t Offset = 0;
4208
4209 if (parseRegisterOrRegisterNumber(Register, DirectiveLoc) ||
4210 parseToken(AsmToken::Comma, "unexpected token in directive") ||
4211 parseAbsoluteExpression(Offset))
4212 return true;
4213
4214 getStreamer().emitCFIOffset(Register, Offset);
4215 return false;
4216}
4217
4218/// parseDirectiveCFIRelOffset
4219/// ::= .cfi_rel_offset register, offset
4220bool AsmParser::parseDirectiveCFIRelOffset(SMLoc DirectiveLoc) {
4221 int64_t Register = 0, Offset = 0;
4222
4223 if (parseRegisterOrRegisterNumber(Register, DirectiveLoc) ||
4224 parseToken(AsmToken::Comma, "unexpected token in directive") ||
4225 parseAbsoluteExpression(Offset))
4226 return true;
4227
4228 getStreamer().emitCFIRelOffset(Register, Offset);
4229 return false;
4230}
4231
4232static bool isValidEncoding(int64_t Encoding) {
4233 if (Encoding & ~0xff)
4234 return false;
4235
4236 if (Encoding == dwarf::DW_EH_PE_omit)
4237 return true;
4238
4239 const unsigned Format = Encoding & 0xf;
4240 if (Format != dwarf::DW_EH_PE_absptr && Format != dwarf::DW_EH_PE_udata2 &&
4241 Format != dwarf::DW_EH_PE_udata4 && Format != dwarf::DW_EH_PE_udata8 &&
4242 Format != dwarf::DW_EH_PE_sdata2 && Format != dwarf::DW_EH_PE_sdata4 &&
4243 Format != dwarf::DW_EH_PE_sdata8 && Format != dwarf::DW_EH_PE_signed)
4244 return false;
4245
4246 const unsigned Application = Encoding & 0x70;
4247 if (Application != dwarf::DW_EH_PE_absptr &&
4248 Application != dwarf::DW_EH_PE_pcrel)
4249 return false;
4250
4251 return true;
4252}
4253
4254/// parseDirectiveCFIPersonalityOrLsda
4255/// IsPersonality true for cfi_personality, false for cfi_lsda
4256/// ::= .cfi_personality encoding, [symbol_name]
4257/// ::= .cfi_lsda encoding, [symbol_name]
4258bool AsmParser::parseDirectiveCFIPersonalityOrLsda(bool IsPersonality) {
4259 int64_t Encoding = 0;
4260 if (parseAbsoluteExpression(Encoding))
4261 return true;
4262 if (Encoding == dwarf::DW_EH_PE_omit)
4263 return false;
4264
4265 StringRef Name;
4266 if (check(!isValidEncoding(Encoding), "unsupported encoding.") ||
4267 parseToken(AsmToken::Comma, "unexpected token in directive") ||
4268 check(parseIdentifier(Name), "expected identifier in directive"))
4269 return true;
4270
4271 MCSymbol *Sym = getContext().getOrCreateSymbol(Name);
4272
4273 if (IsPersonality)
4274 getStreamer().emitCFIPersonality(Sym, Encoding);
4275 else
4276 getStreamer().emitCFILsda(Sym, Encoding);
4277 return false;
4278}
4279
4280/// parseDirectiveCFIRememberState
4281/// ::= .cfi_remember_state
4282bool AsmParser::parseDirectiveCFIRememberState() {
4283 getStreamer().emitCFIRememberState();
4284 return false;
4285}
4286
4287/// parseDirectiveCFIRestoreState
4288/// ::= .cfi_remember_state
4289bool AsmParser::parseDirectiveCFIRestoreState() {
4290 getStreamer().emitCFIRestoreState();
4291 return false;
4292}
4293
4294/// parseDirectiveCFISameValue
4295/// ::= .cfi_same_value register
4296bool AsmParser::parseDirectiveCFISameValue(SMLoc DirectiveLoc) {
4297 int64_t Register = 0;
4298
4299 if (parseRegisterOrRegisterNumber(Register, DirectiveLoc))
4300 return true;
4301
4302 getStreamer().emitCFISameValue(Register);
4303 return false;
4304}
4305
4306/// parseDirectiveCFIRestore
4307/// ::= .cfi_restore register
4308bool AsmParser::parseDirectiveCFIRestore(SMLoc DirectiveLoc) {
4309 int64_t Register = 0;
4310 if (parseRegisterOrRegisterNumber(Register, DirectiveLoc))
4311 return true;
4312
4313 getStreamer().emitCFIRestore(Register);
4314 return false;
4315}
4316
4317/// parseDirectiveCFIEscape
4318/// ::= .cfi_escape expression[,...]
4319bool AsmParser::parseDirectiveCFIEscape() {
4320 std::string Values;
4321 int64_t CurrValue;
4322 if (parseAbsoluteExpression(CurrValue))
4323 return true;
4324
4325 Values.push_back((uint8_t)CurrValue);
4326
4327 while (getLexer().is(AsmToken::Comma)) {
4328 Lex();
4329
4330 if (parseAbsoluteExpression(CurrValue))
4331 return true;
4332
4333 Values.push_back((uint8_t)CurrValue);
4334 }
4335
4336 getStreamer().emitCFIEscape(Values);
4337 return false;
4338}
4339
4340/// parseDirectiveCFIReturnColumn
4341/// ::= .cfi_return_column register
4342bool AsmParser::parseDirectiveCFIReturnColumn(SMLoc DirectiveLoc) {
4343 int64_t Register = 0;
4344 if (parseRegisterOrRegisterNumber(Register, DirectiveLoc))
4345 return true;
4346 getStreamer().emitCFIReturnColumn(Register);
4347 return false;
4348}
4349
4350/// parseDirectiveCFISignalFrame
4351/// ::= .cfi_signal_frame
4352bool AsmParser::parseDirectiveCFISignalFrame() {
4353 if (parseToken(AsmToken::EndOfStatement,
4354 "unexpected token in '.cfi_signal_frame'"))
4355 return true;
4356
4357 getStreamer().emitCFISignalFrame();
4358 return false;
4359}
4360
4361/// parseDirectiveCFIUndefined
4362/// ::= .cfi_undefined register
4363bool AsmParser::parseDirectiveCFIUndefined(SMLoc DirectiveLoc) {
4364 int64_t Register = 0;
4365
4366 if (parseRegisterOrRegisterNumber(Register, DirectiveLoc))
4367 return true;
4368
4369 getStreamer().emitCFIUndefined(Register);
4370 return false;
4371}
4372
4373/// parseDirectiveAltmacro
4374/// ::= .altmacro
4375/// ::= .noaltmacro
4376bool AsmParser::parseDirectiveAltmacro(StringRef Directive) {
4377 if (getLexer().isNot(AsmToken::EndOfStatement))
4378 return TokError("unexpected token in '" + Directive + "' directive");
4379 AltMacroMode = (Directive == ".altmacro");
4380 return false;
4381}
4382
4383/// parseDirectiveMacrosOnOff
4384/// ::= .macros_on
4385/// ::= .macros_off
4386bool AsmParser::parseDirectiveMacrosOnOff(StringRef Directive) {
4387 if (parseToken(AsmToken::EndOfStatement,
4388 "unexpected token in '" + Directive + "' directive"))
4389 return true;
4390
4391 setMacrosEnabled(Directive == ".macros_on");
4392 return false;
4393}
4394
4395/// parseDirectiveMacro
4396/// ::= .macro name[,] [parameters]
4397bool AsmParser::parseDirectiveMacro(SMLoc DirectiveLoc) {
4398 StringRef Name;
4399 if (parseIdentifier(Name))
4400 return TokError("expected identifier in '.macro' directive");
4401
4402 if (getLexer().is(AsmToken::Comma))
4403 Lex();
4404
4405 MCAsmMacroParameters Parameters;
4406 while (getLexer().isNot(AsmToken::EndOfStatement)) {
4407
4408 if (!Parameters.empty() && Parameters.back().Vararg)
4409 return Error(Lexer.getLoc(), "vararg parameter '" +
4410 Parameters.back().Name +
4411 "' should be the last parameter");
4412
4413 MCAsmMacroParameter Parameter;
4414 if (parseIdentifier(Parameter.Name))
4415 return TokError("expected identifier in '.macro' directive");
4416
4417 // Emit an error if two (or more) named parameters share the same name
4418 for (const MCAsmMacroParameter& CurrParam : Parameters)
4419 if (CurrParam.Name.equals(Parameter.Name))
4420 return TokError("macro '" + Name + "' has multiple parameters"
4421 " named '" + Parameter.Name + "'");
4422
4423 if (Lexer.is(AsmToken::Colon)) {
4424 Lex(); // consume ':'
4425
4426 SMLoc QualLoc;
4427 StringRef Qualifier;
4428
4429 QualLoc = Lexer.getLoc();
4430 if (parseIdentifier(Qualifier))
4431 return Error(QualLoc, "missing parameter qualifier for "
4432 "'" + Parameter.Name + "' in macro '" + Name + "'");
4433
4434 if (Qualifier == "req")
4435 Parameter.Required = true;
4436 else if (Qualifier == "vararg")
4437 Parameter.Vararg = true;
4438 else
4439 return Error(QualLoc, Qualifier + " is not a valid parameter qualifier "
4440 "for '" + Parameter.Name + "' in macro '" + Name + "'");
4441 }
4442
4443 if (getLexer().is(AsmToken::Equal)) {
4444 Lex();
4445
4446 SMLoc ParamLoc;
4447
4448 ParamLoc = Lexer.getLoc();
4449 if (parseMacroArgument(Parameter.Value, /*Vararg=*/false ))
4450 return true;
4451
4452 if (Parameter.Required)
4453 Warning(ParamLoc, "pointless default value for required parameter "
4454 "'" + Parameter.Name + "' in macro '" + Name + "'");
4455 }
4456
4457 Parameters.push_back(std::move(Parameter));
4458
4459 if (getLexer().is(AsmToken::Comma))
4460 Lex();
4461 }
4462
4463 // Eat just the end of statement.
4464 Lexer.Lex();
4465
4466 // Consuming deferred text, so use Lexer.Lex to ignore Lexing Errors
4467 AsmToken EndToken, StartToken = getTok();
4468 unsigned MacroDepth = 0;
4469 // Lex the macro definition.
4470 while (true) {
4471 // Ignore Lexing errors in macros.
4472 while (Lexer.is(AsmToken::Error)) {
4473 Lexer.Lex();
4474 }
4475
4476 // Check whether we have reached the end of the file.
4477 if (getLexer().is(AsmToken::Eof))
4478 return Error(DirectiveLoc, "no matching '.endmacro' in definition");
4479
4480 // Otherwise, check whether we have reach the .endmacro or the start of a
4481 // preprocessor line marker.
4482 if (getLexer().is(AsmToken::Identifier)) {
4483 if (getTok().getIdentifier() == ".endm" ||
4484 getTok().getIdentifier() == ".endmacro") {
4485 if (MacroDepth == 0) { // Outermost macro.
4486 EndToken = getTok();
4487 Lexer.Lex();
4488 if (getLexer().isNot(AsmToken::EndOfStatement))
4489 return TokError("unexpected token in '" + EndToken.getIdentifier() +
4490 "' directive");
4491 break;
4492 } else {
4493 // Otherwise we just found the end of an inner macro.
4494 --MacroDepth;
4495 }
4496 } else if (getTok().getIdentifier() == ".macro") {
4497 // We allow nested macros. Those aren't instantiated until the outermost
4498 // macro is expanded so just ignore them for now.
4499 ++MacroDepth;
4500 }
4501 } else if (Lexer.is(AsmToken::HashDirective)) {
4502 (void)parseCppHashLineFilenameComment(getLexer().getLoc());
4503 }
4504
4505 // Otherwise, scan til the end of the statement.
4506 eatToEndOfStatement();
4507 }
4508
4509 if (getContext().lookupMacro(Name)) {
4510 return Error(DirectiveLoc, "macro '" + Name + "' is already defined");
4511 }
4512
4513 const char *BodyStart = StartToken.getLoc().getPointer();
4514 const char *BodyEnd = EndToken.getLoc().getPointer();
4515 StringRef Body = StringRef(BodyStart, BodyEnd - BodyStart);
4516 checkForBadMacro(DirectiveLoc, Name, Body, Parameters);
4517 MCAsmMacro Macro(Name, Body, std::move(Parameters));
4518 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)
4519 Macro.dump())do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("asm-macros")) { dbgs() << "Defining new macro:\n"; Macro
.dump(); } } while (false)
;
4520 getContext().defineMacro(Name, std::move(Macro));
4521 return false;
4522}
4523
4524/// checkForBadMacro
4525///
4526/// With the support added for named parameters there may be code out there that
4527/// is transitioning from positional parameters. In versions of gas that did
4528/// not support named parameters they would be ignored on the macro definition.
4529/// But to support both styles of parameters this is not possible so if a macro
4530/// definition has named parameters but does not use them and has what appears
4531/// to be positional parameters, strings like $1, $2, ... and $n, then issue a
4532/// warning that the positional parameter found in body which have no effect.
4533/// Hoping the developer will either remove the named parameters from the macro
4534/// definition so the positional parameters get used if that was what was
4535/// intended or change the macro to use the named parameters. It is possible
4536/// this warning will trigger when the none of the named parameters are used
4537/// and the strings like $1 are infact to simply to be passed trough unchanged.
4538void AsmParser::checkForBadMacro(SMLoc DirectiveLoc, StringRef Name,
4539 StringRef Body,
4540 ArrayRef<MCAsmMacroParameter> Parameters) {
4541 // If this macro is not defined with named parameters the warning we are
4542 // checking for here doesn't apply.
4543 unsigned NParameters = Parameters.size();
4544 if (NParameters == 0)
4545 return;
4546
4547 bool NamedParametersFound = false;
4548 bool PositionalParametersFound = false;
4549
4550 // Look at the body of the macro for use of both the named parameters and what
4551 // are likely to be positional parameters. This is what expandMacro() is
4552 // doing when it finds the parameters in the body.
4553 while (!Body.empty()) {
4554 // Scan for the next possible parameter.
4555 std::size_t End = Body.size(), Pos = 0;
4556 for (; Pos != End; ++Pos) {
4557 // Check for a substitution or escape.
4558 // This macro is defined with parameters, look for \foo, \bar, etc.
4559 if (Body[Pos] == '\\' && Pos + 1 != End)
4560 break;
4561
4562 // This macro should have parameters, but look for $0, $1, ..., $n too.
4563 if (Body[Pos] != '$' || Pos + 1 == End)
4564 continue;
4565 char Next = Body[Pos + 1];
4566 if (Next == '$' || Next == 'n' ||
4567 isdigit(static_cast<unsigned char>(Next)))
4568 break;
4569 }
4570
4571 // Check if we reached the end.
4572 if (Pos == End)
4573 break;
4574
4575 if (Body[Pos] == '$') {
4576 switch (Body[Pos + 1]) {
4577 // $$ => $
4578 case '$':
4579 break;
4580
4581 // $n => number of arguments
4582 case 'n':
4583 PositionalParametersFound = true;
4584 break;
4585
4586 // $[0-9] => argument
4587 default: {
4588 PositionalParametersFound = true;
4589 break;
4590 }
4591 }
4592 Pos += 2;
4593 } else {
4594 unsigned I = Pos + 1;
4595 while (isIdentifierChar(Body[I]) && I + 1 != End)
4596 ++I;
4597
4598 const char *Begin = Body.data() + Pos + 1;
4599 StringRef Argument(Begin, I - (Pos + 1));
4600 unsigned Index = 0;
4601 for (; Index < NParameters; ++Index)
4602 if (Parameters[Index].Name == Argument)
4603 break;
4604
4605 if (Index == NParameters) {
4606 if (Body[Pos + 1] == '(' && Body[Pos + 2] == ')')
4607 Pos += 3;
4608 else {
4609 Pos = I;
4610 }
4611 } else {
4612 NamedParametersFound = true;
4613 Pos += 1 + Argument.size();
4614 }
4615 }
4616 // Update the scan point.
4617 Body = Body.substr(Pos);
4618 }
4619
4620 if (!NamedParametersFound && PositionalParametersFound)
4621 Warning(DirectiveLoc, "macro defined with named parameters which are not "
4622 "used in macro body, possible positional parameter "
4623 "found in body which will have no effect");
4624}
4625
4626/// parseDirectiveExitMacro
4627/// ::= .exitm
4628bool AsmParser::parseDirectiveExitMacro(StringRef Directive) {
4629 if (parseToken(AsmToken::EndOfStatement,
4630 "unexpected token in '" + Directive + "' directive"))
4631 return true;
4632
4633 if (!isInsideMacroInstantiation())
4634 return TokError("unexpected '" + Directive + "' in file, "
4635 "no current macro definition");
4636
4637 // Exit all conditionals that are active in the current macro.
4638 while (TheCondStack.size() != ActiveMacros.back()->CondStackDepth) {
4639 TheCondState = TheCondStack.back();
4640 TheCondStack.pop_back();
4641 }
4642
4643 handleMacroExit();
4644 return false;
4645}
4646
4647/// parseDirectiveEndMacro
4648/// ::= .endm
4649/// ::= .endmacro
4650bool AsmParser::parseDirectiveEndMacro(StringRef Directive) {
4651 if (getLexer().isNot(AsmToken::EndOfStatement))
4652 return TokError("unexpected token in '" + Directive + "' directive");
4653
4654 // If we are inside a macro instantiation, terminate the current
4655 // instantiation.
4656 if (isInsideMacroInstantiation()) {
4657 handleMacroExit();
4658 return false;
4659 }
4660
4661 // Otherwise, this .endmacro is a stray entry in the file; well formed
4662 // .endmacro directives are handled during the macro definition parsing.
4663 return TokError("unexpected '" + Directive + "' in file, "
4664 "no current macro definition");
4665}
4666
4667/// parseDirectivePurgeMacro
4668/// ::= .purgem
4669bool AsmParser::parseDirectivePurgeMacro(SMLoc DirectiveLoc) {
4670 StringRef Name;
4671 SMLoc Loc;
4672 if (parseTokenLoc(Loc) ||
4673 check(parseIdentifier(Name), Loc,
4674 "expected identifier in '.purgem' directive") ||
4675 parseToken(AsmToken::EndOfStatement,
4676 "unexpected token in '.purgem' directive"))
4677 return true;
4678
4679 if (!getContext().lookupMacro(Name))
4680 return Error(DirectiveLoc, "macro '" + Name + "' is not defined");
4681
4682 getContext().undefineMacro(Name);
4683 DEBUG_WITH_TYPE("asm-macros", dbgs()do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("asm-macros")) { dbgs() << "Un-defining macro: " <<
Name << "\n"; } } while (false)
4684 << "Un-defining macro: " << Name << "\n")do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("asm-macros")) { dbgs() << "Un-defining macro: " <<
Name << "\n"; } } while (false)
;
4685 return false;
4686}
4687
4688/// parseDirectiveBundleAlignMode
4689/// ::= {.bundle_align_mode} expression
4690bool AsmParser::parseDirectiveBundleAlignMode() {
4691 // Expect a single argument: an expression that evaluates to a constant
4692 // in the inclusive range 0-30.
4693 SMLoc ExprLoc = getLexer().getLoc();
4694 int64_t AlignSizePow2;
4695 if (checkForValidSection() || parseAbsoluteExpression(AlignSizePow2) ||
4696 parseToken(AsmToken::EndOfStatement, "unexpected token after expression "
4697 "in '.bundle_align_mode' "
4698 "directive") ||
4699 check(AlignSizePow2 < 0 || AlignSizePow2 > 30, ExprLoc,
4700 "invalid bundle alignment size (expected between 0 and 30)"))
4701 return true;
4702
4703 // Because of AlignSizePow2's verified range we can safely truncate it to
4704 // unsigned.
4705 getStreamer().emitBundleAlignMode(static_cast<unsigned>(AlignSizePow2));
4706 return false;
4707}
4708
4709/// parseDirectiveBundleLock
4710/// ::= {.bundle_lock} [align_to_end]
4711bool AsmParser::parseDirectiveBundleLock() {
4712 if (checkForValidSection())
4713 return true;
4714 bool AlignToEnd = false;
4715
4716 StringRef Option;
4717 SMLoc Loc = getTok().getLoc();
4718 const char *kInvalidOptionError =
4719 "invalid option for '.bundle_lock' directive";
4720
4721 if (!parseOptionalToken(AsmToken::EndOfStatement)) {
4722 if (check(parseIdentifier(Option), Loc, kInvalidOptionError) ||
4723 check(Option != "align_to_end", Loc, kInvalidOptionError) ||
4724 parseToken(AsmToken::EndOfStatement,
4725 "unexpected token after '.bundle_lock' directive option"))
4726 return true;
4727 AlignToEnd = true;
4728 }
4729
4730 getStreamer().emitBundleLock(AlignToEnd);
4731 return false;
4732}
4733
4734/// parseDirectiveBundleLock
4735/// ::= {.bundle_lock}
4736bool AsmParser::parseDirectiveBundleUnlock() {
4737 if (checkForValidSection() ||
4738 parseToken(AsmToken::EndOfStatement,
4739 "unexpected token in '.bundle_unlock' directive"))
4740 return true;
4741
4742 getStreamer().emitBundleUnlock();
4743 return false;
4744}
4745
4746/// parseDirectiveSpace
4747/// ::= (.skip | .space) expression [ , expression ]
4748bool AsmParser::parseDirectiveSpace(StringRef IDVal) {
4749 SMLoc NumBytesLoc = Lexer.getLoc();
4750 const MCExpr *NumBytes;
4751 if (checkForValidSection() || parseExpression(NumBytes))
4752 return true;
4753
4754 int64_t FillExpr = 0;
4755 if (parseOptionalToken(AsmToken::Comma))
4756 if (parseAbsoluteExpression(FillExpr))
4757 return addErrorSuffix("in '" + Twine(IDVal) + "' directive");
4758 if (parseToken(AsmToken::EndOfStatement))
4759 return addErrorSuffix("in '" + Twine(IDVal) + "' directive");
4760
4761 // FIXME: Sometimes the fill expr is 'nop' if it isn't supplied, instead of 0.
4762 getStreamer().emitFill(*NumBytes, FillExpr, NumBytesLoc);
4763
4764 return false;
4765}
4766
4767/// parseDirectiveDCB
4768/// ::= .dcb.{b, l, w} expression, expression
4769bool AsmParser::parseDirectiveDCB(StringRef IDVal, unsigned Size) {
4770 SMLoc NumValuesLoc = Lexer.getLoc();
4771 int64_t NumValues;
4772 if (checkForValidSection() || parseAbsoluteExpression(NumValues))
4773 return true;
4774
4775 if (NumValues < 0) {
4776 Warning(NumValuesLoc, "'" + Twine(IDVal) + "' directive with negative repeat count has no effect");
4777 return false;
4778 }
4779
4780 if (parseToken(AsmToken::Comma,
4781 "unexpected token in '" + Twine(IDVal) + "' directive"))
4782 return true;
4783
4784 const MCExpr *Value;
4785 SMLoc ExprLoc = getLexer().getLoc();
4786 if (parseExpression(Value))
4787 return true;
4788
4789 // Special case constant expressions to match code generator.
4790 if (const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Value)) {
4791 assert(Size <= 8 && "Invalid size")((Size <= 8 && "Invalid size") ? static_cast<void
> (0) : __assert_fail ("Size <= 8 && \"Invalid size\""
, "/build/llvm-toolchain-snapshot-13~++20210306111116+7ae191f59f0f/llvm/lib/MC/MCParser/AsmParser.cpp"
, 4791, __PRETTY_FUNCTION__))
;
4792 uint64_t IntValue = MCE->getValue();
4793 if (!isUIntN(8 * Size, IntValue) && !isIntN(8 * Size, IntValue))
4794 return Error(ExprLoc, "literal value out of range for directive");
4795 for (uint64_t i = 0, e = NumValues; i != e; ++i)
4796 getStreamer().emitIntValue(IntValue, Size);
4797 } else {
4798 for (uint64_t i = 0, e = NumValues; i != e; ++i)
4799 getStreamer().emitValue(Value, Size, ExprLoc);
4800 }
4801
4802 if (parseToken(AsmToken::EndOfStatement,
4803 "unexpected token in '" + Twine(IDVal) + "' directive"))
4804 return true;
4805
4806 return false;
4807}
4808
4809/// parseDirectiveRealDCB
4810/// ::= .dcb.{d, s} expression, expression
4811bool AsmParser::parseDirectiveRealDCB(StringRef IDVal, const fltSemantics &Semantics) {
4812 SMLoc NumValuesLoc = Lexer.getLoc();
4813 int64_t NumValues;
4814 if (checkForValidSection() || parseAbsoluteExpression(NumValues))
4815 return true;
4816
4817 if (NumValues < 0) {
4818 Warning(NumValuesLoc, "'" + Twine(IDVal) + "' directive with negative repeat count has no effect");
4819 return false;
4820 }
4821
4822 if (parseToken(AsmToken::Comma,
4823 "unexpected token in '" + Twine(IDVal) + "' directive"))
4824 return true;
4825
4826 APInt AsInt;
4827 if (parseRealValue(Semantics, AsInt))
4828 return true;
4829
4830 if (parseToken(AsmToken::EndOfStatement,
4831 "unexpected token in '" + Twine(IDVal) + "' directive"))
4832 return true;
4833
4834 for (uint64_t i = 0, e = NumValues; i != e; ++i)
4835 getStreamer().emitIntValue(AsInt.getLimitedValue(),
4836 AsInt.getBitWidth() / 8);
4837
4838 return false;
4839}
4840
4841/// parseDirectiveDS
4842/// ::= .ds.{b, d, l, p, s, w, x} expression
4843bool AsmParser::parseDirectiveDS(StringRef IDVal, unsigned Size) {
4844 SMLoc NumValuesLoc = Lexer.getLoc();
4845 int64_t NumValues;
4846 if (checkForValidSection() || parseAbsoluteExpression(NumValues))
4847 return true;
4848
4849 if (NumValues < 0) {
4850 Warning(NumValuesLoc, "'" + Twine(IDVal) + "' directive with negative repeat count has no effect");
4851 return false;
4852 }
4853
4854 if (parseToken(AsmToken::EndOfStatement,
4855 "unexpected token in '" + Twine(IDVal) + "' directive"))
4856 return true;
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 MCSymbol *Sym = getContext().getOrCreateSymbol(Name);
4896
4897 // Assembler local symbols don't make any sense here. Complain loudly.
4898 if (Sym->isTemporary())
4899 return Error(Loc, "non-local symbol required");
4900
4901 if (!getStreamer().emitSymbolAttribute(Sym, Attr))
4902 return Error(Loc, "unable to emit symbol attribute");
4903 return false;
4904 };
4905
4906 if (parseMany(parseOp))
4907 return addErrorSuffix(" in directive");
4908 return false;
4909}
4910
4911/// parseDirectiveComm
4912/// ::= ( .comm | .lcomm ) identifier , size_expression [ , align_expression ]
4913bool AsmParser::parseDirectiveComm(bool IsLocal) {
4914 if (checkForValidSection())
4915 return true;
4916
4917 SMLoc IDLoc = getLexer().getLoc();
4918 StringRef Name;
4919 if (parseIdentifier(Name))
4920 return TokError("expected identifier in directive");
4921
4922 // Handle the identifier as the key symbol.
4923 MCSymbol *Sym = getContext().getOrCreateSymbol(Name);
4924
4925 if (getLexer().isNot(AsmToken::Comma))
4926 return TokError("unexpected token in directive");
4927 Lex();
4928
4929 int64_t Size;
4930 SMLoc SizeLoc = getLexer().getLoc();
4931 if (parseAbsoluteExpression(Size))
4932 return true;
4933
4934 int64_t Pow2Alignment = 0;
4935 SMLoc Pow2AlignmentLoc;
4936 if (getLexer().is(AsmToken::Comma)) {
4937 Lex();
4938 Pow2AlignmentLoc = getLexer().getLoc();
4939 if (parseAbsoluteExpression(Pow2Alignment))
4940 return true;
4941
4942 LCOMM::LCOMMType LCOMM = Lexer.getMAI().getLCOMMDirectiveAlignmentType();
4943 if (IsLocal && LCOMM == LCOMM::NoAlignment)
4944 return Error(Pow2AlignmentLoc, "alignment not supported on this target");
4945
4946 // If this target takes alignments in bytes (not log) validate and convert.
4947 if ((!IsLocal && Lexer.getMAI().getCOMMDirectiveAlignmentIsInBytes()) ||
4948 (IsLocal && LCOMM == LCOMM::ByteAlignment)) {
4949 if (!isPowerOf2_64(Pow2Alignment))
4950 return Error(Pow2AlignmentLoc, "alignment must be a power of 2");
4951 Pow2Alignment = Log2_64(Pow2Alignment);
4952 }
4953 }
4954
4955 if (parseToken(AsmToken::EndOfStatement,
4956 "unexpected token in '.comm' or '.lcomm' directive"))
4957 return true;
4958
4959 // NOTE: a size of zero for a .comm should create a undefined symbol
4960 // but a size of .lcomm creates a bss symbol of size zero.
4961 if (Size < 0)
4962 return Error(SizeLoc, "invalid '.comm' or '.lcomm' directive size, can't "
4963 "be less than zero");
4964
4965 // NOTE: The alignment in the directive is a power of 2 value, the assembler
4966 // may internally end up wanting an alignment in bytes.
4967 // FIXME: Diagnose overflow.
4968 if (Pow2Alignment < 0)
4969 return Error(Pow2AlignmentLoc, "invalid '.comm' or '.lcomm' directive "
4970 "alignment, can't be less than zero");
4971
4972 Sym->redefineIfPossible();
4973 if (!Sym->isUndefined())
4974 return Error(IDLoc, "invalid symbol redefinition");
4975
4976 // Create the Symbol as a common or local common with Size and Pow2Alignment
4977 if (IsLocal) {
4978 getStreamer().emitLocalCommonSymbol(Sym, Size, 1 << Pow2Alignment);
4979 return false;
4980 }
4981
4982 getStreamer().emitCommonSymbol(Sym, Size, 1 << Pow2Alignment);
4983 return false;
4984}
4985
4986/// parseDirectiveAbort
4987/// ::= .abort [... message ...]
4988bool AsmParser::parseDirectiveAbort() {
4989 // FIXME: Use loc from directive.
4990 SMLoc Loc = getLexer().getLoc();
4991
4992 StringRef Str = parseStringToEndOfStatement();
4993 if (parseToken(AsmToken::EndOfStatement,
4994 "unexpected token in '.abort' directive"))
4995 return true;
4996
4997 if (Str.empty())
4998 return Error(Loc, ".abort detected. Assembly stopping.");
4999 else
5000 return Error(Loc, ".abort '" + Str + "' detected. Assembly stopping.");
5001 // FIXME: Actually abort assembly here.
5002
5003 return false;
5004}
5005
5006/// parseDirectiveInclude
5007/// ::= .include "filename"
5008bool AsmParser::parseDirectiveInclude() {
5009 // Allow the strings to have escaped octal character sequence.
5010 std::string Filename;
5011 SMLoc IncludeLoc = getTok().getLoc();
5012
5013 if (check(getTok().isNot(AsmToken::String),
5014 "expected string in '.include' directive") ||
5015 parseEscapedString(Filename) ||
5016 check(getTok().isNot(AsmToken::EndOfStatement),
5017 "unexpected token in '.include' directive") ||
5018 // Attempt to switch the lexer to the included file before consuming the
5019 // end of statement to avoid losing it when we switch.
5020 check(enterIncludeFile(Filename), IncludeLoc,
5021 "Could not find include file '" + Filename + "'"))
5022 return true;
5023
5024 return false;
5025}
5026
5027/// parseDirectiveIncbin
5028/// ::= .incbin "filename" [ , skip [ , count ] ]
5029bool AsmParser::parseDirectiveIncbin() {
5030 // Allow the strings to have escaped octal character sequence.
5031 std::string Filename;
5032 SMLoc IncbinLoc = getTok().getLoc();
5033 if (check(getTok().isNot(AsmToken::String),
5034 "expected string in '.incbin' directive") ||
5035 parseEscapedString(Filename))
5036 return true;
5037
5038 int64_t Skip = 0;
5039 const MCExpr *Count = nullptr;
5040 SMLoc SkipLoc, CountLoc;
5041 if (parseOptionalToken(AsmToken::Comma)) {
5042 // The skip expression can be omitted while specifying the count, e.g:
5043 // .incbin "filename",,4
5044 if (getTok().isNot(AsmToken::Comma)) {
5045 if (parseTokenLoc(SkipLoc) || parseAbsoluteExpression(Skip))
5046 return true;
5047 }
5048 if (parseOptionalToken(AsmToken::Comma)) {
5049 CountLoc = getTok().getLoc();
5050 if (parseExpression(Count))
5051 return true;
5052 }
5053 }
5054
5055 if (parseToken(AsmToken::EndOfStatement,
5056 "unexpected token in '.incbin' directive"))
5057 return true;
5058
5059 if (check(Skip < 0, SkipLoc, "skip is negative"))
5060 return true;
5061
5062 // Attempt to process the included file.
5063 if (processIncbinFile(Filename, Skip, Count, CountLoc))
5064 return Error(IncbinLoc, "Could not find incbin file '" + Filename + "'");
5065 return false;
5066}
5067
5068/// parseDirectiveIf
5069/// ::= .if{,eq,ge,gt,le,lt,ne} expression
5070bool AsmParser::parseDirectiveIf(SMLoc DirectiveLoc, DirectiveKind DirKind) {
5071 TheCondStack.push_back(TheCondState);
5072 TheCondState.TheCond = AsmCond::IfCond;
5073 if (TheCondState.Ignore) {
5074 eatToEndOfStatement();
5075 } else {
5076 int64_t ExprValue;
5077 if (parseAbsoluteExpression(ExprValue) ||
5078 parseToken(AsmToken::EndOfStatement,
5079 "unexpected token in '.if' directive"))
5080 return true;
5081
5082 switch (DirKind) {
5083 default:
5084 llvm_unreachable("unsupported directive")::llvm::llvm_unreachable_internal("unsupported directive", "/build/llvm-toolchain-snapshot-13~++20210306111116+7ae191f59f0f/llvm/lib/MC/MCParser/AsmParser.cpp"
, 5084)
;
5085 case DK_IF:
5086 case DK_IFNE:
5087 break;
5088 case DK_IFEQ:
5089 ExprValue = ExprValue == 0;
5090 break;
5091 case DK_IFGE:
5092 ExprValue = ExprValue >= 0;
5093 break;
5094 case DK_IFGT:
5095 ExprValue = ExprValue > 0;
5096 break;
5097 case DK_IFLE:
5098 ExprValue = ExprValue <= 0;
5099 break;
5100 case DK_IFLT:
5101 ExprValue = ExprValue < 0;
5102 break;
5103 }
5104
5105 TheCondState.CondMet = ExprValue;
5106 TheCondState.Ignore = !TheCondState.CondMet;
5107 }
5108
5109 return false;
5110}
5111
5112/// parseDirectiveIfb
5113/// ::= .ifb string
5114bool AsmParser::parseDirectiveIfb(SMLoc DirectiveLoc, bool ExpectBlank) {
5115 TheCondStack.push_back(TheCondState);
5116 TheCondState.TheCond = AsmCond::IfCond;
5117
5118 if (TheCondState.Ignore) {
5119 eatToEndOfStatement();
5120 } else {
5121 StringRef Str = parseStringToEndOfStatement();
5122
5123 if (parseToken(AsmToken::EndOfStatement,
5124 "unexpected token in '.ifb' directive"))
5125 return true;
5126
5127 TheCondState.CondMet = ExpectBlank == Str.empty();
5128 TheCondState.Ignore = !TheCondState.CondMet;
5129 }
5130
5131 return false;
5132}
5133
5134/// parseDirectiveIfc
5135/// ::= .ifc string1, string2
5136/// ::= .ifnc string1, string2
5137bool AsmParser::parseDirectiveIfc(SMLoc DirectiveLoc, bool ExpectEqual) {
5138 TheCondStack.push_back(TheCondState);
5139 TheCondState.TheCond = AsmCond::IfCond;
5140
5141 if (TheCondState.Ignore) {
5142 eatToEndOfStatement();
5143 } else {
5144 StringRef Str1 = parseStringToComma();
5145
5146 if (parseToken(AsmToken::Comma, "unexpected token in '.ifc' directive"))
5147 return true;
5148
5149 StringRef Str2 = parseStringToEndOfStatement();
5150
5151 if (parseToken(AsmToken::EndOfStatement,
5152 "unexpected token in '.ifc' directive"))
5153 return true;
5154
5155 TheCondState.CondMet = ExpectEqual == (Str1.trim() == Str2.trim());
5156 TheCondState.Ignore = !TheCondState.CondMet;
5157 }
5158
5159 return false;
5160}
5161
5162/// parseDirectiveIfeqs
5163/// ::= .ifeqs string1, string2
5164bool AsmParser::parseDirectiveIfeqs(SMLoc DirectiveLoc, bool ExpectEqual) {
5165 if (Lexer.isNot(AsmToken::String)) {
5166 if (ExpectEqual)
5167 return TokError("expected string parameter for '.ifeqs' directive");
5168 return TokError("expected string parameter for '.ifnes' directive");
5169 }
5170
5171 StringRef String1 = getTok().getStringContents();
5172 Lex();
5173
5174 if (Lexer.isNot(AsmToken::Comma)) {
5175 if (ExpectEqual)
5176 return TokError(
5177 "expected comma after first string for '.ifeqs' directive");
5178 return TokError("expected comma after first string for '.ifnes' directive");
5179 }
5180
5181 Lex();
5182
5183 if (Lexer.isNot(AsmToken::String)) {
5184 if (ExpectEqual)
5185 return TokError("expected string parameter for '.ifeqs' directive");
5186 return TokError("expected string parameter for '.ifnes' directive");
5187 }
5188
5189 StringRef String2 = getTok().getStringContents();
5190 Lex();
5191
5192 TheCondStack.push_back(TheCondState);
5193 TheCondState.TheCond = AsmCond::IfCond;
5194 TheCondState.CondMet = ExpectEqual == (String1 == String2);
5195 TheCondState.Ignore = !TheCondState.CondMet;
5196
5197 return false;
5198}
5199
5200/// parseDirectiveIfdef
5201/// ::= .ifdef symbol
5202bool AsmParser::parseDirectiveIfdef(SMLoc DirectiveLoc, bool expect_defined) {
5203 StringRef Name;
5204 TheCondStack.push_back(TheCondState);
5205 TheCondState.TheCond = AsmCond::IfCond;
5206
5207 if (TheCondState.Ignore) {
5208 eatToEndOfStatement();
5209 } else {
5210 if (check(parseIdentifier(Name), "expected identifier after '.ifdef'") ||
5211 parseToken(AsmToken::EndOfStatement, "unexpected token in '.ifdef'"))
5212 return true;
5213
5214 MCSymbol *Sym = getContext().lookupSymbol(Name);
5215
5216 if (expect_defined)
5217 TheCondState.CondMet = (Sym && !Sym->isUndefined(false));
5218 else
5219 TheCondState.CondMet = (!Sym || Sym->isUndefined(false));
5220 TheCondState.Ignore = !TheCondState.CondMet;
5221 }
5222
5223 return false;
5224}
5225
5226/// parseDirectiveElseIf
5227/// ::= .elseif expression
5228bool AsmParser::parseDirectiveElseIf(SMLoc DirectiveLoc) {
5229 if (TheCondState.TheCond != AsmCond::IfCond &&
5230 TheCondState.TheCond != AsmCond::ElseIfCond)
5231 return Error(DirectiveLoc, "Encountered a .elseif that doesn't follow an"
5232 " .if or an .elseif");
5233 TheCondState.TheCond = AsmCond::ElseIfCond;
5234
5235 bool LastIgnoreState = false;
5236 if (!TheCondStack.empty())
5237 LastIgnoreState = TheCondStack.back().Ignore;
5238 if (LastIgnoreState || TheCondState.CondMet) {
5239 TheCondState.Ignore = true;
5240 eatToEndOfStatement();
5241 } else {
5242 int64_t ExprValue;
5243 if (parseAbsoluteExpression(ExprValue))
5244 return true;
5245
5246 if (parseToken(AsmToken::EndOfStatement,
5247 "unexpected token in '.elseif' directive"))
5248 return true;
5249
5250 TheCondState.CondMet = ExprValue;
5251 TheCondState.Ignore = !TheCondState.CondMet;
5252 }
5253
5254 return false;
5255}
5256
5257/// parseDirectiveElse
5258/// ::= .else
5259bool AsmParser::parseDirectiveElse(SMLoc DirectiveLoc) {
5260 if (parseToken(AsmToken::EndOfStatement,
5261 "unexpected token in '.else' directive"))
5262 return true;
5263
5264 if (TheCondState.TheCond != AsmCond::IfCond &&
5265 TheCondState.TheCond != AsmCond::ElseIfCond)
5266 return Error(DirectiveLoc, "Encountered a .else that doesn't follow "
5267 " an .if or an .elseif");
5268 TheCondState.TheCond = AsmCond::ElseCond;
5269 bool LastIgnoreState = false;
5270 if (!TheCondStack.empty())
5271 LastIgnoreState = TheCondStack.back().Ignore;
5272 if (LastIgnoreState || TheCondState.CondMet)
5273 TheCondState.Ignore = true;
5274 else
5275 TheCondState.Ignore = false;
5276
5277 return false;
5278}
5279
5280/// parseDirectiveEnd
5281/// ::= .end
5282bool AsmParser::parseDirectiveEnd(SMLoc DirectiveLoc) {
5283 if (parseToken(AsmToken::EndOfStatement,
5284 "unexpected token in '.end' directive"))
5285 return true;
5286
5287 while (Lexer.isNot(AsmToken::Eof))
5288 Lexer.Lex();
5289
5290 return false;
5291}
5292
5293/// parseDirectiveError
5294/// ::= .err
5295/// ::= .error [string]
5296bool AsmParser::parseDirectiveError(SMLoc L, bool WithMessage) {
5297 if (!TheCondStack.empty()) {
5298 if (TheCondStack.back().Ignore) {
5299 eatToEndOfStatement();
5300 return false;
5301 }
5302 }
5303
5304 if (!WithMessage)
5305 return Error(L, ".err encountered");
5306
5307 StringRef Message = ".error directive invoked in source file";
5308 if (Lexer.isNot(AsmToken::EndOfStatement)) {
5309 if (Lexer.isNot(AsmToken::String))
5310 return TokError(".error argument must be a string");
5311
5312 Message = getTok().getStringContents();
5313 Lex();
5314 }
5315
5316 return Error(L, Message);
5317}
5318
5319/// parseDirectiveWarning
5320/// ::= .warning [string]
5321bool AsmParser::parseDirectiveWarning(SMLoc L) {
5322 if (!TheCondStack.empty()) {
5323 if (TheCondStack.back().Ignore) {
5324 eatToEndOfStatement();
5325 return false;
5326 }
5327 }
5328
5329 StringRef Message = ".warning directive invoked in source file";
5330
5331 if (!parseOptionalToken(AsmToken::EndOfStatement)) {
5332 if (Lexer.isNot(AsmToken::String))
5333 return TokError(".warning argument must be a string");
5334
5335 Message = getTok().getStringContents();
5336 Lex();
5337 if (parseToken(AsmToken::EndOfStatement,
5338 "expected end of statement in '.warning' directive"))
5339 return true;
5340 }
5341
5342 return Warning(L, Message);
5343}
5344
5345/// parseDirectiveEndIf
5346/// ::= .endif
5347bool AsmParser::parseDirectiveEndIf(SMLoc DirectiveLoc) {
5348 if (parseToken(AsmToken::EndOfStatement,
5349 "unexpected token in '.endif' directive"))
5350 return true;
5351
5352 if ((TheCondState.TheCond == AsmCond::NoCond) || TheCondStack.empty())
5353 return Error(DirectiveLoc, "Encountered a .endif that doesn't follow "
5354 "an .if or .else");
5355 if (!TheCondStack.empty()) {
5356 TheCondState = TheCondStack.back();
5357 TheCondStack.pop_back();
5358 }
5359
5360 return false;
5361}
5362
5363void AsmParser::initializeDirectiveKindMap() {
5364 /* Lookup will be done with the directive
5365 * converted to lower case, so all these
5366 * keys should be lower case.
5367 * (target specific directives are handled
5368 * elsewhere)
5369 */
5370 DirectiveKindMap[".set"] = DK_SET;
5371 DirectiveKindMap[".equ"] = DK_EQU;
5372 DirectiveKindMap[".equiv"] = DK_EQUIV;
5373 DirectiveKindMap[".ascii"] = DK_ASCII;
5374 DirectiveKindMap[".asciz"] = DK_ASCIZ;
5375 DirectiveKindMap[".string"] = DK_STRING;
5376 DirectiveKindMap[".byte"] = DK_BYTE;
5377 DirectiveKindMap[".short"] = DK_SHORT;
5378 DirectiveKindMap[".value"] = DK_VALUE;
5379 DirectiveKindMap[".2byte"] = DK_2BYTE;
5380 DirectiveKindMap[".long"] = DK_LONG;
5381 DirectiveKindMap[".int"] = DK_INT;
5382 DirectiveKindMap[".4byte"] = DK_4BYTE;
5383 DirectiveKindMap[".quad"] = DK_QUAD;
5384 DirectiveKindMap[".8byte"] = DK_8BYTE;
5385 DirectiveKindMap[".octa"] = DK_OCTA;
5386 DirectiveKindMap[".single"] = DK_SINGLE;
5387 DirectiveKindMap[".float"] = DK_FLOAT;
5388 DirectiveKindMap[".double"] = DK_DOUBLE;
5389 DirectiveKindMap[".align"] = DK_ALIGN;
5390 DirectiveKindMap[".align32"] = DK_ALIGN32;
5391 DirectiveKindMap[".balign"] = DK_BALIGN;
5392 DirectiveKindMap[".balignw"] = DK_BALIGNW;
5393 DirectiveKindMap[".balignl"] = DK_BALIGNL;
5394 DirectiveKindMap[".p2align"] = DK_P2ALIGN;
5395 DirectiveKindMap[".p2alignw"] = DK_P2ALIGNW;
5396 DirectiveKindMap[".p2alignl"] = DK_P2ALIGNL;
5397 DirectiveKindMap[".org"] = DK_ORG;
5398 DirectiveKindMap[".fill"] = DK_FILL;
5399 DirectiveKindMap[".zero"] = DK_ZERO;
5400 DirectiveKindMap[".extern"] = DK_EXTERN;
5401 DirectiveKindMap[".globl"] = DK_GLOBL;
5402 DirectiveKindMap[".global"] = DK_GLOBAL;
5403 DirectiveKindMap[".lazy_reference"] = DK_LAZY_REFERENCE;
5404 DirectiveKindMap[".no_dead_strip"] = DK_NO_DEAD_STRIP;
5405 DirectiveKindMap[".symbol_resolver"] = DK_SYMBOL_RESOLVER;
5406 DirectiveKindMap[".private_extern"] = DK_PRIVATE_EXTERN;
5407 DirectiveKindMap[".reference"] = DK_REFERENCE;
5408 DirectiveKindMap[".weak_definition"] = DK_WEAK_DEFINITION;
5409 DirectiveKindMap[".weak_reference"] = DK_WEAK_REFERENCE;
5410 DirectiveKindMap[".weak_def_can_be_hidden"] = DK_WEAK_DEF_CAN_BE_HIDDEN;
5411 DirectiveKindMap[".cold"] = DK_COLD;
5412 DirectiveKindMap[".comm"] = DK_COMM;
5413 DirectiveKindMap[".common"] = DK_COMMON;
5414 DirectiveKindMap[".lcomm"] = DK_LCOMM;
5415 DirectiveKindMap[".abort"] = DK_ABORT;
5416 DirectiveKindMap[".include"] = DK_INCLUDE;
5417 DirectiveKindMap[".incbin"] = DK_INCBIN;
5418 DirectiveKindMap[".code16"] = DK_CODE16;
5419 DirectiveKindMap[".code16gcc"] = DK_CODE16GCC;
5420 DirectiveKindMap[".rept"] = DK_REPT;
5421 DirectiveKindMap[".rep"] = DK_REPT;
5422 DirectiveKindMap[".irp"] = DK_IRP;
5423 DirectiveKindMap[".irpc"] = DK_IRPC;
5424 DirectiveKindMap[".endr"] = DK_ENDR;
5425 DirectiveKindMap[".bundle_align_mode"] = DK_BUNDLE_ALIGN_MODE;
5426 DirectiveKindMap[".bundle_lock"] = DK_BUNDLE_LOCK;
5427 DirectiveKindMap[".bundle_unlock"] = DK_BUNDLE_UNLOCK;
5428 DirectiveKindMap[".if"] = DK_IF;
5429 DirectiveKindMap[".ifeq"] = DK_IFEQ;
5430 DirectiveKindMap[".ifge"] = DK_IFGE;
5431 DirectiveKindMap[".ifgt"] = DK_IFGT;
5432 DirectiveKindMap[".ifle"] = DK_IFLE;
5433 DirectiveKindMap[".iflt"] = DK_IFLT;
5434 DirectiveKindMap[".ifne"] = DK_IFNE;
5435 DirectiveKindMap[".ifb"] = DK_IFB;
5436 DirectiveKindMap[".ifnb"] = DK_IFNB;
5437 DirectiveKindMap[".ifc"] = DK_IFC;
5438 DirectiveKindMap[".ifeqs"] = DK_IFEQS;
5439 DirectiveKindMap[".ifnc"] = DK_IFNC;
5440 DirectiveKindMap[".ifnes"] = DK_IFNES;
5441 DirectiveKindMap[".ifdef"] = DK_IFDEF;
5442 DirectiveKindMap[".ifndef"] = DK_IFNDEF;
5443 DirectiveKindMap[".ifnotdef"] = DK_IFNOTDEF;
5444 DirectiveKindMap[".elseif"] = DK_ELSEIF;
5445 DirectiveKindMap[".else"] = DK_ELSE;
5446 DirectiveKindMap[".end"] = DK_END;
5447 DirectiveKindMap[".endif"] = DK_ENDIF;
5448 DirectiveKindMap[".skip"] = DK_SKIP;
5449 DirectiveKindMap[".space"] = DK_SPACE;
5450 DirectiveKindMap[".file"] = DK_FILE;
5451 DirectiveKindMap[".line"] = DK_LINE;
5452 DirectiveKindMap[".loc"] = DK_LOC;
5453 DirectiveKindMap[".stabs"] = DK_STABS;
5454 DirectiveKindMap[".cv_file"] = DK_CV_FILE;
5455 DirectiveKindMap[".cv_func_id"] = DK_CV_FUNC_ID;
5456 DirectiveKindMap[".cv_loc"] = DK_CV_LOC;
5457 DirectiveKindMap[".cv_linetable"] = DK_CV_LINETABLE;
5458 DirectiveKindMap[".cv_inline_linetable"] = DK_CV_INLINE_LINETABLE;
5459 DirectiveKindMap[".cv_inline_site_id"] = DK_CV_INLINE_SITE_ID;
5460 DirectiveKindMap[".cv_def_range"] = DK_CV_DEF_RANGE;
5461 DirectiveKindMap[".cv_string"] = DK_CV_STRING;
5462 DirectiveKindMap[".cv_stringtable"] = DK_CV_STRINGTABLE;
5463 DirectiveKindMap[".cv_filechecksums"] = DK_CV_FILECHECKSUMS;
5464 DirectiveKindMap[".cv_filechecksumoffset"] = DK_CV_FILECHECKSUM_OFFSET;
5465 DirectiveKindMap[".cv_fpo_data"] = DK_CV_FPO_DATA;
5466 DirectiveKindMap[".sleb128"] = DK_SLEB128;
5467 DirectiveKindMap[".uleb128"] = DK_ULEB128;
5468 DirectiveKindMap[".cfi_sections"] = DK_CFI_SECTIONS;
5469 DirectiveKindMap[".cfi_startproc"] = DK_CFI_STARTPROC;
5470 DirectiveKindMap[".cfi_endproc"] = DK_CFI_ENDPROC;
5471 DirectiveKindMap[".cfi_def_cfa"] = DK_CFI_DEF_CFA;
5472 DirectiveKindMap[".cfi_def_cfa_offset"] = DK_CFI_DEF_CFA_OFFSET;
5473 DirectiveKindMap[".cfi_adjust_cfa_offset"] = DK_CFI_ADJUST_CFA_OFFSET;
5474 DirectiveKindMap[".cfi_def_cfa_register"] = DK_CFI_DEF_CFA_REGISTER;
5475 DirectiveKindMap[".cfi_offset"] = DK_CFI_OFFSET;
5476 DirectiveKindMap[".cfi_rel_offset"] = DK_CFI_REL_OFFSET;
5477 DirectiveKindMap[".cfi_personality"] = DK_CFI_PERSONALITY;
5478 DirectiveKindMap[".cfi_lsda"] = DK_CFI_LSDA;
5479 DirectiveKindMap[".cfi_remember_state"] = DK_CFI_REMEMBER_STATE;
5480 DirectiveKindMap[".cfi_restore_state"] = DK_CFI_RESTORE_STATE;
5481 DirectiveKindMap[".cfi_same_value"] = DK_CFI_SAME_VALUE;
5482 DirectiveKindMap[".cfi_restore"] = DK_CFI_RESTORE;
5483 DirectiveKindMap[".cfi_escape"] = DK_CFI_ESCAPE;
5484 DirectiveKindMap[".cfi_return_column"] = DK_CFI_RETURN_COLUMN;
5485 DirectiveKindMap[".cfi_signal_frame"] = DK_CFI_SIGNAL_FRAME;
5486 DirectiveKindMap[".cfi_undefined"] = DK_CFI_UNDEFINED;
5487 DirectiveKindMap[".cfi_register"] = DK_CFI_REGISTER;
5488 DirectiveKindMap[".cfi_window_save"] = DK_CFI_WINDOW_SAVE;
5489 DirectiveKindMap[".cfi_b_key_frame"] = DK_CFI_B_KEY_FRAME;
5490 DirectiveKindMap[".macros_on"] = DK_MACROS_ON;
5491 DirectiveKindMap[".macros_off"] = DK_MACROS_OFF;
5492 DirectiveKindMap[".macro"] = DK_MACRO;
5493 DirectiveKindMap[".exitm"] = DK_EXITM;
5494 DirectiveKindMap[".endm"] = DK_ENDM;
5495 DirectiveKindMap[".endmacro"] = DK_ENDMACRO;
5496 DirectiveKindMap[".purgem"] = DK_PURGEM;
5497 DirectiveKindMap[".err"] = DK_ERR;
5498 DirectiveKindMap[".error"] = DK_ERROR;
5499 DirectiveKindMap[".warning"] = DK_WARNING;
5500 DirectiveKindMap[".altmacro"] = DK_ALTMACRO;
5501 DirectiveKindMap[".noaltmacro"] = DK_NOALTMACRO;
5502 DirectiveKindMap[".reloc"] = DK_RELOC;
5503 DirectiveKindMap[".dc"] = DK_DC;
5504 DirectiveKindMap[".dc.a"] = DK_DC_A;
5505 DirectiveKindMap[".dc.b"] = DK_DC_B;
5506 DirectiveKindMap[".dc.d"] = DK_DC_D;
5507 DirectiveKindMap[".dc.l"] = DK_DC_L;
5508 DirectiveKindMap[".dc.s"] = DK_DC_S;
5509 DirectiveKindMap[".dc.w"] = DK_DC_W;
5510 DirectiveKindMap[".dc.x"] = DK_DC_X;
5511 DirectiveKindMap[".dcb"] = DK_DCB;
5512 DirectiveKindMap[".dcb.b"] = DK_DCB_B;
5513 DirectiveKindMap[".dcb.d"] = DK_DCB_D;
5514 DirectiveKindMap[".dcb.l"] = DK_DCB_L;
5515 DirectiveKindMap[".dcb.s"] = DK_DCB_S;
5516 DirectiveKindMap[".dcb.w"] = DK_DCB_W;
5517 DirectiveKindMap[".dcb.x"] = DK_DCB_X;
5518 DirectiveKindMap[".ds"] = DK_DS;
5519 DirectiveKindMap[".ds.b"] = DK_DS_B;
5520 DirectiveKindMap[".ds.d"] = DK_DS_D;
5521 DirectiveKindMap[".ds.l"] = DK_DS_L;
5522 DirectiveKindMap[".ds.p"] = DK_DS_P;
5523 DirectiveKindMap[".ds.s"] = DK_DS_S;
5524 DirectiveKindMap[".ds.w"] = DK_DS_W;
5525 DirectiveKindMap[".ds.x"] = DK_DS_X;
5526 DirectiveKindMap[".print"] = DK_PRINT;
5527 DirectiveKindMap[".addrsig"] = DK_ADDRSIG;
5528 DirectiveKindMap[".addrsig_sym"] = DK_ADDRSIG_SYM;
5529 DirectiveKindMap[".pseudoprobe"] = DK_PSEUDO_PROBE;
5530}
5531
5532MCAsmMacro *AsmParser::parseMacroLikeBody(SMLoc DirectiveLoc) {
5533 AsmToken EndToken, StartToken = getTok();
5534
5535 unsigned NestLevel = 0;
5536 while (true) {
5537 // Check whether we have reached the end of the file.
5538 if (getLexer().is(AsmToken::Eof)) {
5539 printError(DirectiveLoc, "no matching '.endr' in definition");
5540 return nullptr;
5541 }
5542
5543 if (Lexer.is(AsmToken::Identifier) &&
5544 (getTok().getIdentifier() == ".rep" ||
5545 getTok().getIdentifier() == ".rept" ||
5546 getTok().getIdentifier() == ".irp" ||
5547 getTok().getIdentifier() == ".irpc")) {
5548 ++NestLevel;
5549 }
5550
5551 // Otherwise, check whether we have reached the .endr.
5552 if (Lexer.is(AsmToken::Identifier) && getTok().getIdentifier() == ".endr") {
5553 if (NestLevel == 0) {
5554 EndToken = getTok();
5555 Lex();
5556 if (Lexer.isNot(AsmToken::EndOfStatement)) {
5557 printError(getTok().getLoc(),
5558 "unexpected token in '.endr' directive");
5559 return nullptr;
5560 }
5561 break;
5562 }
5563 --NestLevel;
5564 }
5565
5566 // Otherwise, scan till the end of the statement.
5567 eatToEndOfStatement();
5568 }
5569
5570 const char *BodyStart = StartToken.getLoc().getPointer();
5571 const char *BodyEnd = EndToken.getLoc().getPointer();
5572 StringRef Body = StringRef(BodyStart, BodyEnd - BodyStart);
5573
5574 // We Are Anonymous.
5575 MacroLikeBodies.emplace_back(StringRef(), Body, MCAsmMacroParameters());
5576 return &MacroLikeBodies.back();
5577}
5578
5579void AsmParser::instantiateMacroLikeBody(MCAsmMacro *M, SMLoc DirectiveLoc,
5580 raw_svector_ostream &OS) {
5581 OS << ".endr\n";
5582
5583 std::unique_ptr<MemoryBuffer> Instantiation =
5584 MemoryBuffer::getMemBufferCopy(OS.str(), "<instantiation>");
5585
5586 // Create the macro instantiation object and add to the current macro
5587 // instantiation stack.
5588 MacroInstantiation *MI = new MacroInstantiation{
5589 DirectiveLoc, CurBuffer, getTok().getLoc(), TheCondStack.size()};
5590 ActiveMacros.push_back(MI);
5591
5592 // Jump to the macro instantiation and prime the lexer.
5593 CurBuffer = SrcMgr.AddNewSourceBuffer(std::move(Instantiation), SMLoc());
5594 Lexer.setBuffer(SrcMgr.getMemoryBuffer(CurBuffer)->getBuffer());
5595 Lex();
5596}
5597
5598/// parseDirectiveRept
5599/// ::= .rep | .rept count
5600bool AsmParser::parseDirectiveRept(SMLoc DirectiveLoc, StringRef Dir) {
5601 const MCExpr *CountExpr;
5602 SMLoc CountLoc = getTok().getLoc();
5603 if (parseExpression(CountExpr))
5604 return true;
5605
5606 int64_t Count;
5607 if (!CountExpr->evaluateAsAbsolute(Count, getStreamer().getAssemblerPtr())) {
5608 return Error(CountLoc, "unexpected token in '" + Dir + "' directive");
5609 }
5610
5611 if (check(Count < 0, CountLoc, "Count is negative") ||
5612 parseToken(AsmToken::EndOfStatement,
5613 "unexpected token in '" + Dir + "' directive"))
5614 return true;
5615
5616 // Lex the rept definition.
5617 MCAsmMacro *M = parseMacroLikeBody(DirectiveLoc);
5618 if (!M)
5619 return true;
5620
5621 // Macro instantiation is lexical, unfortunately. We construct a new buffer
5622 // to hold the macro body with substitutions.
5623 SmallString<256> Buf;
5624 raw_svector_ostream OS(Buf);
5625 while (Count--) {
5626 // Note that the AtPseudoVariable is disabled for instantiations of .rep(t).
5627 if (expandMacro(OS, M->Body, None, None, false, getTok().getLoc()))
5628 return true;
5629 }
5630 instantiateMacroLikeBody(M, DirectiveLoc, OS);
5631
5632 return false;
5633}
5634
5635/// parseDirectiveIrp
5636/// ::= .irp symbol,values
5637bool AsmParser::parseDirectiveIrp(SMLoc DirectiveLoc) {
5638 MCAsmMacroParameter Parameter;
5639 MCAsmMacroArguments A;
5640 if (check(parseIdentifier(Parameter.Name),
5641 "expected identifier in '.irp' directive") ||
5642 parseToken(AsmToken::Comma, "expected comma in '.irp' directive") ||
5643 parseMacroArguments(nullptr, A) ||
5644 parseToken(AsmToken::EndOfStatement, "expected End of Statement"))
5645 return true;
5646
5647 // Lex the irp definition.
5648 MCAsmMacro *M = parseMacroLikeBody(DirectiveLoc);
5649 if (!M)
5650 return true;
5651
5652 // Macro instantiation is lexical, unfortunately. We construct a new buffer
5653 // to hold the macro body with substitutions.
5654 SmallString<256> Buf;
5655 raw_svector_ostream OS(Buf);
5656
5657 for (const MCAsmMacroArgument &Arg : A) {
5658 // Note that the AtPseudoVariable is enabled for instantiations of .irp.
5659 // This is undocumented, but GAS seems to support it.
5660 if (expandMacro(OS, M->Body, Parameter, Arg, true, getTok().getLoc()))
5661 return true;
5662 }
5663
5664 instantiateMacroLikeBody(M, DirectiveLoc, OS);
5665
5666 return false;
5667}
5668
5669/// parseDirectiveIrpc
5670/// ::= .irpc symbol,values
5671bool AsmParser::parseDirectiveIrpc(SMLoc DirectiveLoc) {
5672 MCAsmMacroParameter Parameter;
5673 MCAsmMacroArguments A;
5674
5675 if (check(parseIdentifier(Parameter.Name),
5676 "expected identifier in '.irpc' directive") ||
5677 parseToken(AsmToken::Comma, "expected comma in '.irpc' directive") ||
5678 parseMacroArguments(nullptr, A))
5679 return true;
5680
5681 if (A.size() != 1 || A.front().size() != 1)
5682 return TokError("unexpected token in '.irpc' directive");
5683
5684 // Eat the end of statement.
5685 if (parseToken(AsmToken::EndOfStatement, "expected end of statement"))
5686 return true;
5687
5688 // Lex the irpc definition.
5689 MCAsmMacro *M = parseMacroLikeBody(DirectiveLoc);
5690 if (!M)
5691 return true;
5692
5693 // Macro instantiation is lexical, unfortunately. We construct a new buffer
5694 // to hold the macro body with substitutions.
5695 SmallString<256> Buf;
5696 raw_svector_ostream OS(Buf);
5697
5698 StringRef Values = A.front().front().getString();
5699 for (std::size_t I = 0, End = Values.size(); I != End; ++I) {
5700 MCAsmMacroArgument Arg;
5701 Arg.emplace_back(AsmToken::Identifier, Values.slice(I, I + 1));
5702
5703 // Note that the AtPseudoVariable is enabled for instantiations of .irpc.
5704 // This is undocumented, but GAS seems to support it.
5705 if (expandMacro(OS, M->Body, Parameter, Arg, true, getTok().getLoc()))
5706 return true;
5707 }
5708
5709 instantiateMacroLikeBody(M, DirectiveLoc, OS);
5710
5711 return false;
5712}
5713
5714bool AsmParser::parseDirectiveEndr(SMLoc DirectiveLoc) {
5715 if (ActiveMacros.empty())
5716 return TokError("unmatched '.endr' directive");
5717
5718 // The only .repl that should get here are the ones created by
5719 // instantiateMacroLikeBody.
5720 assert(getLexer().is(AsmToken::EndOfStatement))((getLexer().is(AsmToken::EndOfStatement)) ? static_cast<void
> (0) : __assert_fail ("getLexer().is(AsmToken::EndOfStatement)"
, "/build/llvm-toolchain-snapshot-13~++20210306111116+7ae191f59f0f/llvm/lib/MC/MCParser/AsmParser.cpp"
, 5720, __PRETTY_FUNCTION__))
;
5721
5722 handleMacroExit();
5723 return false;
5724}
5725
5726bool AsmParser::parseDirectiveMSEmit(SMLoc IDLoc, ParseStatementInfo &Info,
5727 size_t Len) {
5728 const MCExpr *Value;
5729 SMLoc ExprLoc = getLexer().getLoc();
5730 if (parseExpression(Value))
5731 return true;
5732 const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Value);
5733 if (!MCE)
5734 return Error(ExprLoc, "unexpected expression in _emit");
5735 uint64_t IntValue = MCE->getValue();
5736 if (!isUInt<8>(IntValue) && !isInt<8>(IntValue))
5737 return Error(ExprLoc, "literal value out of range for directive");
5738
5739 Info.AsmRewrites->emplace_back(AOK_Emit, IDLoc, Len);
5740 return false;
5741}
5742
5743bool AsmParser::parseDirectiveMSAlign(SMLoc IDLoc, ParseStatementInfo &Info) {
5744 const MCExpr *Value;
5745 SMLoc ExprLoc = getLexer().getLoc();
5746 if (parseExpression(Value))
5747 return true;
5748 const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Value);
5749 if (!MCE)
5750 return Error(ExprLoc, "unexpected expression in align");
5751 uint64_t IntValue = MCE->getValue();
5752 if (!isPowerOf2_64(IntValue))
5753 return Error(ExprLoc, "literal value not a power of two greater then zero");
5754
5755 Info.AsmRewrites->emplace_back(AOK_Align, IDLoc, 5, Log2_64(IntValue));
5756 return false;
5757}
5758
5759bool AsmParser::parseDirectivePrint(SMLoc DirectiveLoc) {
5760 const AsmToken StrTok = getTok();
5761 Lex();
5762 if (StrTok.isNot(AsmToken::String) || StrTok.getString().front() != '"')
5763 return Error(DirectiveLoc, "expected double quoted string after .print");
5764 if (parseToken(AsmToken::EndOfStatement, "expected end of statement"))
5765 return true;
5766 llvm::outs() << StrTok.getStringContents() << '\n';
5767 return false;
5768}
5769
5770bool AsmParser::parseDirectiveAddrsig() {
5771 getStreamer().emitAddrsig();
5772 return false;
5773}
5774
5775bool AsmParser::parseDirectiveAddrsigSym() {
5776 StringRef Name;
5777 if (check(parseIdentifier(Name),
5778 "expected identifier in '.addrsig_sym' directive"))
5779 return true;
5780 MCSymbol *Sym = getContext().getOrCreateSymbol(Name);
5781 getStreamer().emitAddrsigSym(Sym);
5782 return false;
5783}
5784
5785bool AsmParser::parseDirectivePseudoProbe() {
5786 int64_t Guid;
30
'Guid' declared without an initial value
5787 int64_t Index;
5788 int64_t Type;
5789 int64_t Attr;
5790
5791 if (getLexer().is(AsmToken::Integer)) {
31
Calling 'MCAsmLexer::is'
37
Returning from 'MCAsmLexer::is'
38
Taking false branch
5792 if (parseIntToken(Guid, "unexpected token in '.pseudoprobe' directive"))
5793 return true;
5794 }
5795
5796 if (getLexer().is(AsmToken::Integer)) {
39
Calling 'MCAsmLexer::is'
45
Returning from 'MCAsmLexer::is'
46
Taking false branch
5797 if (parseIntToken(Index, "unexpected token in '.pseudoprobe' directive"))
5798 return true;
5799 }
5800
5801 if (getLexer().is(AsmToken::Integer)) {
47
Calling 'MCAsmLexer::is'
53
Returning from 'MCAsmLexer::is'
54
Taking false branch
5802 if (parseIntToken(Type, "unexpected token in '.pseudoprobe' directive"))
5803 return true;
5804 }
5805
5806 if (getLexer().is(AsmToken::Integer)) {
55
Calling 'MCAsmLexer::is'
61
Returning from 'MCAsmLexer::is'
62
Taking false branch
5807 if (parseIntToken(Attr, "unexpected token in '.pseudoprobe' directive"))
5808 return true;
5809 }
5810
5811 // Parse inline stack like @ GUID:11:12 @ GUID:1:11 @ GUID:3:21
5812 MCPseudoProbeInlineStack InlineStack;
5813
5814 while (getLexer().is(AsmToken::At)) {
63
Calling 'MCAsmLexer::is'
69
Returning from 'MCAsmLexer::is'
70
Loop condition is false. Execution continues on line 5840
5815 // eat @
5816 Lex();
5817
5818 int64_t CallerGuid = 0;
5819 if (getLexer().is(AsmToken::Integer)) {
5820 if (parseIntToken(CallerGuid,
5821 "unexpected token in '.pseudoprobe' directive"))
5822 return true;
5823 }
5824
5825 // eat colon
5826 if (getLexer().is(AsmToken::Colon))
5827 Lex();
5828
5829 int64_t CallerProbeId = 0;
5830 if (getLexer().is(AsmToken::Integer)) {
5831 if (parseIntToken(CallerProbeId,
5832 "unexpected token in '.pseudoprobe' directive"))
5833 return true;
5834 }
5835
5836 InlineSite Site(CallerGuid, CallerProbeId);
5837 InlineStack.push_back(Site);
5838 }
5839
5840 if (parseToken(AsmToken::EndOfStatement,
71
Assuming the condition is false
72
Taking false branch
5841 "unexpected token in '.pseudoprobe' directive"))
5842 return true;
5843
5844 getStreamer().emitPseudoProbe(Guid, Index, Type, Attr, InlineStack);
73
1st function call argument is an uninitialized value
5845 return false;
5846}
5847
5848// We are comparing pointers, but the pointers are relative to a single string.
5849// Thus, this should always be deterministic.
5850static int rewritesSort(const AsmRewrite *AsmRewriteA,
5851 const AsmRewrite *AsmRewriteB) {
5852 if (AsmRewriteA->Loc.getPointer() < AsmRewriteB->Loc.getPointer())
5853 return -1;
5854 if (AsmRewriteB->Loc.getPointer() < AsmRewriteA->Loc.getPointer())
5855 return 1;
5856
5857 // It's possible to have a SizeDirective, Imm/ImmPrefix and an Input/Output
5858 // rewrite to the same location. Make sure the SizeDirective rewrite is
5859 // performed first, then the Imm/ImmPrefix and finally the Input/Output. This
5860 // ensures the sort algorithm is stable.
5861 if (AsmRewritePrecedence[AsmRewriteA->Kind] >
5862 AsmRewritePrecedence[AsmRewriteB->Kind])
5863 return -1;
5864
5865 if (AsmRewritePrecedence[AsmRewriteA->Kind] <
5866 AsmRewritePrecedence[AsmRewriteB->Kind])
5867 return 1;
5868 llvm_unreachable("Unstable rewrite sort.")::llvm::llvm_unreachable_internal("Unstable rewrite sort.", "/build/llvm-toolchain-snapshot-13~++20210306111116+7ae191f59f0f/llvm/lib/MC/MCParser/AsmParser.cpp"
, 5868)
;
5869}
5870
5871bool AsmParser::parseMSInlineAsm(
5872 void *AsmLoc, std::string &AsmString, unsigned &NumOutputs,
5873 unsigned &NumInputs, SmallVectorImpl<std::pair<void *, bool>> &OpDecls,
5874 SmallVectorImpl<std::string> &Constraints,
5875 SmallVectorImpl<std::string> &Clobbers, const MCInstrInfo *MII,
5876 const MCInstPrinter *IP, MCAsmParserSemaCallback &SI) {
5877 SmallVector<void *, 4> InputDecls;
5878 SmallVector<void *, 4> OutputDecls;
5879 SmallVector<bool, 4> InputDeclsAddressOf;
5880 SmallVector<bool, 4> OutputDeclsAddressOf;
5881 SmallVector<std::string, 4> InputConstraints;
5882 SmallVector<std::string, 4> OutputConstraints;
5883 SmallVector<unsigned, 4> ClobberRegs;
5884
5885 SmallVector<AsmRewrite, 4> AsmStrRewrites;
5886
5887 // Prime the lexer.
5888 Lex();
5889
5890 // While we have input, parse each statement.
5891 unsigned InputIdx = 0;
5892 unsigned OutputIdx = 0;
5893 while (getLexer().isNot(AsmToken::Eof)) {
5894 // Parse curly braces marking block start/end
5895 if (parseCurlyBlockScope(AsmStrRewrites))
5896 continue;
5897
5898 ParseStatementInfo Info(&AsmStrRewrites);
5899 bool StatementErr = parseStatement(Info, &SI);
5900
5901 if (StatementErr || Info.ParseError) {
5902 // Emit pending errors if any exist.
5903 printPendingErrors();
5904 return true;
5905 }
5906
5907 // No pending error should exist here.
5908 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~++20210306111116+7ae191f59f0f/llvm/lib/MC/MCParser/AsmParser.cpp"
, 5908, __PRETTY_FUNCTION__))
;
5909
5910 if (Info.Opcode == ~0U)
5911 continue;
5912
5913 const MCInstrDesc &Desc = MII->get(Info.Opcode);
5914
5915 // Build the list of clobbers, outputs and inputs.
5916 for (unsigned i = 1, e = Info.ParsedOperands.size(); i != e; ++i) {
5917 MCParsedAsmOperand &Operand = *Info.ParsedOperands[i];
5918
5919 // Register operand.
5920 if (Operand.isReg() && !Operand.needAddressOf() &&
5921 !getTargetParser().OmitRegisterFromClobberLists(Operand.getReg())) {
5922 unsigned NumDefs = Desc.getNumDefs();
5923 // Clobber.
5924 if (NumDefs && Operand.getMCOperandNum() < NumDefs)
5925 ClobberRegs.push_back(Operand.getReg());
5926 continue;
5927 }
5928
5929 // Expr/Input or Output.
5930 StringRef SymName = Operand.getSymName();
5931 if (SymName.empty())
5932 continue;
5933
5934 void *OpDecl = Operand.getOpDecl();
5935 if (!OpDecl)
5936 continue;
5937
5938 StringRef Constraint = Operand.getConstraint();
5939 if (Operand.isImm()) {
5940 // Offset as immediate
5941 if (Operand.isOffsetOfLocal())
5942 Constraint = "r";
5943 else
5944 Constraint = "i";
5945 }
5946
5947 bool isOutput = (i == 1) && Desc.mayStore();
5948 SMLoc Start = SMLoc::getFromPointer(SymName.data());
5949 if (isOutput) {
5950 ++InputIdx;
5951 OutputDecls.push_back(OpDecl);
5952 OutputDeclsAddressOf.push_back(Operand.needAddressOf());
5953 OutputConstraints.push_back(("=" + Constraint).str());
5954 AsmStrRewrites.emplace_back(AOK_Output, Start, SymName.size());
5955 } else {
5956 InputDecls.push_back(OpDecl);
5957 InputDeclsAddressOf.push_back(Operand.needAddressOf());
5958 InputConstraints.push_back(Constraint.str());
5959 if (Desc.OpInfo[i - 1].isBranchTarget())
5960 AsmStrRewrites.emplace_back(AOK_CallInput, Start, SymName.size());
5961 else
5962 AsmStrRewrites.emplace_back(AOK_Input, Start, SymName.size());
5963 }
5964 }
5965
5966 // Consider implicit defs to be clobbers. Think of cpuid and push.
5967 ArrayRef<MCPhysReg> ImpDefs(Desc.getImplicitDefs(),
5968 Desc.getNumImplicitDefs());
5969 llvm::append_range(ClobberRegs, ImpDefs);
5970 }
5971
5972 // Set the number of Outputs and Inputs.
5973 NumOutputs = OutputDecls.size();
5974 NumInputs = InputDecls.size();
5975
5976 // Set the unique clobbers.
5977 array_pod_sort(ClobberRegs.begin(), ClobberRegs.end());
5978 ClobberRegs.erase(std::unique(ClobberRegs.begin(), ClobberRegs.end()),
5979 ClobberRegs.end());
5980 Clobbers.assign(ClobberRegs.size(), std::string());
5981 for (unsigned I = 0, E = ClobberRegs.size(); I != E; ++I) {
5982 raw_string_ostream OS(Clobbers[I]);
5983 IP->printRegName(OS, ClobberRegs[I]);
5984 }
5985
5986 // Merge the various outputs and inputs. Output are expected first.
5987 if (NumOutputs || NumInputs) {
5988 unsigned NumExprs = NumOutputs + NumInputs;
5989 OpDecls.resize(NumExprs);
5990 Constraints.resize(NumExprs);
5991 for (unsigned i = 0; i < NumOutputs; ++i) {
5992 OpDecls[i] = std::make_pair(OutputDecls[i], OutputDeclsAddressOf[i]);
5993 Constraints[i] = OutputConstraints[i];
5994 }
5995 for (unsigned i = 0, j = NumOutputs; i < NumInputs; ++i, ++j) {
5996 OpDecls[j] = std::make_pair(InputDecls[i], InputDeclsAddressOf[i]);
5997 Constraints[j] = InputConstraints[i];
5998 }
5999 }
6000
6001 // Build the IR assembly string.
6002 std::string AsmStringIR;
6003 raw_string_ostream OS(AsmStringIR);
6004 StringRef ASMString =
6005 SrcMgr.getMemoryBuffer(SrcMgr.getMainFileID())->getBuffer();
6006 const char *AsmStart = ASMString.begin();
6007 const char *AsmEnd = ASMString.end();
6008 array_pod_sort(AsmStrRewrites.begin(), AsmStrRewrites.end(), rewritesSort);
6009 for (auto it = AsmStrRewrites.begin(); it != AsmStrRewrites.end(); ++it) {
6010 const AsmRewrite &AR = *it;
6011 // Check if this has already been covered by another rewrite...
6012 if (AR.Done)
6013 continue;
6014 AsmRewriteKind Kind = AR.Kind;
6015
6016 const char *Loc = AR.Loc.getPointer();
6017 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~++20210306111116+7ae191f59f0f/llvm/lib/MC/MCParser/AsmParser.cpp"
, 6017, __PRETTY_FUNCTION__))
;
6018
6019 // Emit everything up to the immediate/expression.
6020 if (unsigned Len = Loc - AsmStart)
6021 OS << StringRef(AsmStart, Len);
6022
6023 // Skip the original expression.
6024 if (Kind == AOK_Skip) {
6025 AsmStart = Loc + AR.Len;
6026 continue;
6027 }
6028
6029 unsigned AdditionalSkip = 0;
6030 // Rewrite expressions in $N notation.
6031 switch (Kind) {
6032 default:
6033 break;
6034 case AOK_IntelExpr:
6035 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~++20210306111116+7ae191f59f0f/llvm/lib/MC/MCParser/AsmParser.cpp"
, 6035, __PRETTY_FUNCTION__))
;
6036 if (AR.IntelExp.NeedBracs)
6037 OS << "[";
6038 if (AR.IntelExp.hasBaseReg())
6039 OS << AR.IntelExp.BaseReg;
6040 if (AR.IntelExp.hasIndexReg())
6041 OS << (AR.IntelExp.hasBaseReg() ? " + " : "")
6042 << AR.IntelExp.IndexReg;
6043 if (AR.IntelExp.Scale > 1)
6044 OS << " * $$" << AR.IntelExp.Scale;
6045 if (AR.IntelExp.hasOffset()) {
6046 if (AR.IntelExp.hasRegs())
6047 OS << " + ";
6048 // Fuse this rewrite with a rewrite of the offset name, if present.
6049 StringRef OffsetName = AR.IntelExp.OffsetName;
6050 SMLoc OffsetLoc = SMLoc::getFromPointer(AR.IntelExp.OffsetName.data());
6051 size_t OffsetLen = OffsetName.size();
6052 auto rewrite_it = std::find_if(
6053 it, AsmStrRewrites.end(), [&](const AsmRewrite &FusingAR) {
6054 return FusingAR.Loc == OffsetLoc && FusingAR.Len == OffsetLen &&
6055 (FusingAR.Kind == AOK_Input ||
6056 FusingAR.Kind == AOK_CallInput);
6057 });
6058 if (rewrite_it == AsmStrRewrites.end()) {
6059 OS << "offset " << OffsetName;
6060 } else if (rewrite_it->Kind == AOK_CallInput) {
6061 OS << "${" << InputIdx++ << ":P}";
6062 rewrite_it->Done = true;
6063 } else {
6064 OS << '$' << InputIdx++;
6065 rewrite_it->Done = true;
6066 }
6067 }
6068 if (AR.IntelExp.Imm || AR.IntelExp.emitImm())
6069 OS << (AR.IntelExp.emitImm() ? "$$" : " + $$") << AR.IntelExp.Imm;
6070 if (AR.IntelExp.NeedBracs)
6071 OS << "]";
6072 break;
6073 case AOK_Label:
6074 OS << Ctx.getAsmInfo()->getPrivateLabelPrefix() << AR.Label;
6075 break;
6076 case AOK_Input:
6077 OS << '$' << InputIdx++;
6078 break;
6079 case AOK_CallInput:
6080 OS << "${" << InputIdx++ << ":P}";
6081 break;
6082 case AOK_Output:
6083 OS << '$' << OutputIdx++;
6084 break;
6085 case AOK_SizeDirective:
6086 switch (AR.Val) {
6087 default: break;
6088 case 8: OS << "byte ptr "; break;
6089 case 16: OS << "word ptr "; break;
6090 case 32: OS << "dword ptr "; break;
6091 case 64: OS << "qword ptr "; break;
6092 case 80: OS << "xword ptr "; break;
6093 case 128: OS << "xmmword ptr "; break;
6094 case 256: OS << "ymmword ptr "; break;
6095 }
6096 break;
6097 case AOK_Emit:
6098 OS << ".byte";
6099 break;
6100 case AOK_Align: {
6101 // MS alignment directives are measured in bytes. If the native assembler
6102 // measures alignment in bytes, we can pass it straight through.
6103 OS << ".align";
6104 if (getContext().getAsmInfo()->getAlignmentIsInBytes())
6105 break;
6106
6107 // Alignment is in log2 form, so print that instead and skip the original
6108 // immediate.
6109 unsigned Val = AR.Val;
6110 OS << ' ' << Val;
6111 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~++20210306111116+7ae191f59f0f/llvm/lib/MC/MCParser/AsmParser.cpp"
, 6111, __PRETTY_FUNCTION__))
;
6112 AdditionalSkip = (Val < 4) ? 2 : Val < 7 ? 3 : 4;
6113 break;
6114 }
6115 case AOK_EVEN:
6116 OS << ".even";
6117 break;
6118 case AOK_EndOfStatement:
6119 OS << "\n\t";
6120 break;
6121 }
6122
6123 // Skip the original expression.
6124 AsmStart = Loc + AR.Len + AdditionalSkip;
6125 }
6126
6127 // Emit the remainder of the asm string.
6128 if (AsmStart != AsmEnd)
6129 OS << StringRef(AsmStart, AsmEnd - AsmStart);
6130
6131 AsmString = OS.str();
6132 return false;
6133}
6134
6135namespace llvm {
6136namespace MCParserUtils {
6137
6138/// Returns whether the given symbol is used anywhere in the given expression,
6139/// or subexpressions.
6140static bool isSymbolUsedInExpression(const MCSymbol *Sym, const MCExpr *Value) {
6141 switch (Value->getKind()) {
6142 case MCExpr::Binary: {
6143 const MCBinaryExpr *BE = static_cast<const MCBinaryExpr *>(Value);
6144 return isSymbolUsedInExpression(Sym, BE->getLHS()) ||
6145 isSymbolUsedInExpression(Sym, BE->getRHS());
6146 }
6147 case MCExpr::Target:
6148 case MCExpr::Constant:
6149 return false;
6150 case MCExpr::SymbolRef: {
6151 const MCSymbol &S =
6152 static_cast<const MCSymbolRefExpr *>(Value)->getSymbol();
6153 if (S.isVariable())
6154 return isSymbolUsedInExpression(Sym, S.getVariableValue());
6155 return &S == Sym;
6156 }
6157 case MCExpr::Unary:
6158 return isSymbolUsedInExpression(
6159 Sym, static_cast<const MCUnaryExpr *>(Value)->getSubExpr());
6160 }
6161
6162 llvm_unreachable("Unknown expr kind!")::llvm::llvm_unreachable_internal("Unknown expr kind!", "/build/llvm-toolchain-snapshot-13~++20210306111116+7ae191f59f0f/llvm/lib/MC/MCParser/AsmParser.cpp"
, 6162)
;
6163}
6164
6165bool parseAssignmentExpression(StringRef Name, bool allow_redef,
6166 MCAsmParser &Parser, MCSymbol *&Sym,
6167 const MCExpr *&Value) {
6168
6169 // FIXME: Use better location, we should use proper tokens.
6170 SMLoc EqualLoc = Parser.getTok().getLoc();
6171 if (Parser.parseExpression(Value))
6172 return Parser.TokError("missing expression");
6173
6174 // Note: we don't count b as used in "a = b". This is to allow
6175 // a = b
6176 // b = c
6177
6178 if (Parser.parseToken(AsmToken::EndOfStatement))
6179 return true;
6180
6181 // Validate that the LHS is allowed to be a variable (either it has not been
6182 // used as a symbol, or it is an absolute symbol).
6183 Sym = Parser.getContext().lookupSymbol(Name);
6184 if (Sym) {
6185 // Diagnose assignment to a label.
6186 //
6187 // FIXME: Diagnostics. Note the location of the definition as a label.
6188 // FIXME: Diagnose assignment to protected identifier (e.g., register name).
6189 if (isSymbolUsedInExpression(Sym, Value))
6190 return Parser.Error(EqualLoc, "Recursive use of '" + Name + "'");
6191 else if (Sym->isUndefined(/*SetUsed*/ false) && !Sym->isUsed() &&
6192 !Sym->isVariable())
6193 ; // Allow redefinitions of undefined symbols only used in directives.
6194 else if (Sym->isVariable() && !Sym->isUsed() && allow_redef)
6195 ; // Allow redefinitions of variables that haven't yet been used.
6196 else if (!Sym->isUndefined() && (!Sym->isVariable() || !allow_redef))
6197 return Parser.Error(EqualLoc, "redefinition of '" + Name + "'");
6198 else if (!Sym->isVariable())
6199 return Parser.Error(EqualLoc, "invalid assignment to '" + Name + "'");
6200 else if (!isa<MCConstantExpr>(Sym->getVariableValue()))
6201 return Parser.Error(EqualLoc,
6202 "invalid reassignment of non-absolute variable '" +
6203 Name + "'");
6204 } else if (Name == ".") {
6205 Parser.getStreamer().emitValueToOffset(Value, 0, EqualLoc);
6206 return false;
6207 } else
6208 Sym = Parser.getContext().getOrCreateSymbol(Name);
6209
6210 Sym->setRedefinable(allow_redef);
6211
6212 return false;
6213}
6214
6215} // end namespace MCParserUtils
6216} // end namespace llvm
6217
6218/// Create an MCAsmParser instance.
6219MCAsmParser *llvm::createMCAsmParser(SourceMgr &SM, MCContext &C,
6220 MCStreamer &Out, const MCAsmInfo &MAI,
6221 unsigned CB) {
6222 return new AsmParser(SM, C, Out, MAI, CB);
6223}

/build/llvm-toolchain-snapshot-13~++20210306111116+7ae191f59f0f/llvm/include/llvm/MC/MCParser/MCAsmLexer.h

1//===- llvm/MC/MCAsmLexer.h - Abstract Asm Lexer Interface ------*- C++ -*-===//
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#ifndef LLVM_MC_MCPARSER_MCASMLEXER_H
10#define LLVM_MC_MCPARSER_MCASMLEXER_H
11
12#include "llvm/ADT/ArrayRef.h"
13#include "llvm/ADT/SmallVector.h"
14#include "llvm/MC/MCAsmMacro.h"
15#include <algorithm>
16#include <cassert>
17#include <cstddef>
18#include <cstdint>
19#include <string>
20
21namespace llvm {
22
23/// A callback class which is notified of each comment in an assembly file as
24/// it is lexed.
25class AsmCommentConsumer {
26public:
27 virtual ~AsmCommentConsumer() = default;
28
29 /// Callback function for when a comment is lexed. Loc is the start of the
30 /// comment text (excluding the comment-start marker). CommentText is the text
31 /// of the comment, excluding the comment start and end markers, and the
32 /// newline for single-line comments.
33 virtual void HandleComment(SMLoc Loc, StringRef CommentText) = 0;
34};
35
36
37/// Generic assembler lexer interface, for use by target specific assembly
38/// lexers.
39class MCAsmLexer {
40 /// The current token, stored in the base class for faster access.
41 SmallVector<AsmToken, 1> CurTok;
42
43 /// The location and description of the current error
44 SMLoc ErrLoc;
45 std::string Err;
46
47protected: // Can only create subclasses.
48 const char *TokStart = nullptr;
49 bool SkipSpace = true;
50 bool AllowAtInIdentifier;
51 bool IsAtStartOfStatement = true;
52 bool LexMasmHexFloats = false;
53 bool LexMasmIntegers = false;
54 bool LexMasmStrings = false;
55 bool UseMasmDefaultRadix = false;
56 unsigned DefaultRadix = 10;
57 AsmCommentConsumer *CommentConsumer = nullptr;
58
59 MCAsmLexer();
60
61 virtual AsmToken LexToken() = 0;
62
63 void SetError(SMLoc errLoc, const std::string &err) {
64 ErrLoc = errLoc;
65 Err = err;
66 }
67
68public:
69 MCAsmLexer(const MCAsmLexer &) = delete;
70 MCAsmLexer &operator=(const MCAsmLexer &) = delete;
71 virtual ~MCAsmLexer();
72
73 /// Consume the next token from the input stream and return it.
74 ///
75 /// The lexer will continuously return the end-of-file token once the end of
76 /// the main input file has been reached.
77 const AsmToken &Lex() {
78 assert(!CurTok.empty())((!CurTok.empty()) ? static_cast<void> (0) : __assert_fail
("!CurTok.empty()", "/build/llvm-toolchain-snapshot-13~++20210306111116+7ae191f59f0f/llvm/include/llvm/MC/MCParser/MCAsmLexer.h"
, 78, __PRETTY_FUNCTION__))
;
79 // Mark if we parsing out a EndOfStatement.
80 IsAtStartOfStatement = CurTok.front().getKind() == AsmToken::EndOfStatement;
81 CurTok.erase(CurTok.begin());
82 // LexToken may generate multiple tokens via UnLex but will always return
83 // the first one. Place returned value at head of CurTok vector.
84 if (CurTok.empty()) {
85 AsmToken T = LexToken();
86 CurTok.insert(CurTok.begin(), T);
87 }
88 return CurTok.front();
89 }
90
91 void UnLex(AsmToken const &Token) {
92 IsAtStartOfStatement = false;
93 CurTok.insert(CurTok.begin(), Token);
94 }
95
96 bool isAtStartOfStatement() { return IsAtStartOfStatement; }
97
98 virtual StringRef LexUntilEndOfStatement() = 0;
99
100 /// Get the current source location.
101 SMLoc getLoc() const;
102
103 /// Get the current (last) lexed token.
104 const AsmToken &getTok() const {
105 return CurTok[0];
106 }
107
108 /// Look ahead at the next token to be lexed.
109 const AsmToken peekTok(bool ShouldSkipSpace = true) {
110 AsmToken Tok;
111
112 MutableArrayRef<AsmToken> Buf(Tok);
113 size_t ReadCount = peekTokens(Buf, ShouldSkipSpace);
114
115 assert(ReadCount == 1)((ReadCount == 1) ? static_cast<void> (0) : __assert_fail
("ReadCount == 1", "/build/llvm-toolchain-snapshot-13~++20210306111116+7ae191f59f0f/llvm/include/llvm/MC/MCParser/MCAsmLexer.h"
, 115, __PRETTY_FUNCTION__))
;
116 (void)ReadCount;
117
118 return Tok;
119 }
120
121 /// Look ahead an arbitrary number of tokens.
122 virtual size_t peekTokens(MutableArrayRef<AsmToken> Buf,
123 bool ShouldSkipSpace = true) = 0;
124
125 /// Get the current error location
126 SMLoc getErrLoc() {
127 return ErrLoc;
128 }
129
130 /// Get the current error string
131 const std::string &getErr() {
132 return Err;
133 }
134
135 /// Get the kind of current token.
136 AsmToken::TokenKind getKind() const { return getTok().getKind(); }
137
138 /// Check if the current token has kind \p K.
139 bool is(AsmToken::TokenKind K) const { return getTok().is(K); }
32
Calling 'AsmToken::is'
35
Returning from 'AsmToken::is'
36
Returning zero, which participates in a condition later
40
Calling 'AsmToken::is'
43
Returning from 'AsmToken::is'
44
Returning zero, which participates in a condition later
48
Calling 'AsmToken::is'
51
Returning from 'AsmToken::is'
52
Returning zero, which participates in a condition later
56
Calling 'AsmToken::is'
59
Returning from 'AsmToken::is'
60
Returning zero, which participates in a condition later
64
Calling 'AsmToken::is'
67
Returning from 'AsmToken::is'
68
Returning zero, which participates in a condition later
140
141 /// Check if the current token has kind \p K.
142 bool isNot(AsmToken::TokenKind K) const { return getTok().isNot(K); }
143
144 /// Set whether spaces should be ignored by the lexer
145 void setSkipSpace(bool val) { SkipSpace = val; }
146
147 bool getAllowAtInIdentifier() { return AllowAtInIdentifier; }
148 void setAllowAtInIdentifier(bool v) { AllowAtInIdentifier = v; }
149
150 void setCommentConsumer(AsmCommentConsumer *CommentConsumer) {
151 this->CommentConsumer = CommentConsumer;
152 }
153
154 /// Set whether to lex masm-style binary (e.g., 0b1101) and radix-specified
155 /// literals (e.g., 0ABCh [hex], 576t [decimal], 77o [octal], 1101y [binary]).
156 void setLexMasmIntegers(bool V) { LexMasmIntegers = V; }
157
158 /// Set whether to use masm-style default-radix integer literals. If disabled,
159 /// assume decimal unless prefixed (e.g., 0x2c [hex], 077 [octal]).
160 void useMasmDefaultRadix(bool V) { UseMasmDefaultRadix = V; }
161
162 unsigned getMasmDefaultRadix() const { return DefaultRadix; }
163 void setMasmDefaultRadix(unsigned Radix) { DefaultRadix = Radix; }
164
165 /// Set whether to lex masm-style hex float literals, such as 3f800000r.
166 void setLexMasmHexFloats(bool V) { LexMasmHexFloats = V; }
167
168 /// Set whether to lex masm-style string literals, such as 'Can''t find file'
169 /// and "This ""value"" not found".
170 void setLexMasmStrings(bool V) { LexMasmStrings = V; }
171};
172
173} // end namespace llvm
174
175#endif // LLVM_MC_MCPARSER_MCASMLEXER_H

/build/llvm-toolchain-snapshot-13~++20210306111116+7ae191f59f0f/llvm/include/llvm/MC/MCAsmMacro.h

1//===- MCAsmMacro.h - Assembly Macros ---------------------------*- C++ -*-===//
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#ifndef LLVM_MC_MCASMMACRO_H
10#define LLVM_MC_MCASMMACRO_H
11
12#include "llvm/ADT/APInt.h"
13#include "llvm/ADT/StringRef.h"
14#include "llvm/Support/Debug.h"
15#include "llvm/Support/SMLoc.h"
16#include <vector>
17
18namespace llvm {
19
20/// Target independent representation for an assembler token.
21class AsmToken {
22public:
23 enum TokenKind {
24 // Markers
25 Eof, Error,
26
27 // String values.
28 Identifier,
29 String,
30
31 // Integer values.
32 Integer,
33 BigNum, // larger than 64 bits
34
35 // Real values.
36 Real,
37
38 // Comments
39 Comment,
40 HashDirective,
41 // No-value.
42 EndOfStatement,
43 Colon,
44 Space,
45 Plus, Minus, Tilde,
46 Slash, // '/'
47 BackSlash, // '\'
48 LParen, RParen, LBrac, RBrac, LCurly, RCurly,
49 Star, Dot, Comma, Dollar, Equal, EqualEqual,
50
51 Pipe, PipePipe, Caret,
52 Amp, AmpAmp, Exclaim, ExclaimEqual, Percent, Hash,
53 Less, LessEqual, LessLess, LessGreater,
54 Greater, GreaterEqual, GreaterGreater, At, MinusGreater,
55
56 // MIPS unary expression operators such as %neg.
57 PercentCall16, PercentCall_Hi, PercentCall_Lo, PercentDtprel_Hi,
58 PercentDtprel_Lo, PercentGot, PercentGot_Disp, PercentGot_Hi, PercentGot_Lo,
59 PercentGot_Ofst, PercentGot_Page, PercentGottprel, PercentGp_Rel, PercentHi,
60 PercentHigher, PercentHighest, PercentLo, PercentNeg, PercentPcrel_Hi,
61 PercentPcrel_Lo, PercentTlsgd, PercentTlsldm, PercentTprel_Hi,
62 PercentTprel_Lo
63 };
64
65private:
66 TokenKind Kind;
67
68 /// A reference to the entire token contents; this is always a pointer into
69 /// a memory buffer owned by the source manager.
70 StringRef Str;
71
72 APInt IntVal;
73
74public:
75 AsmToken() = default;
76 AsmToken(TokenKind Kind, StringRef Str, APInt IntVal)
77 : Kind(Kind), Str(Str), IntVal(std::move(IntVal)) {}
78 AsmToken(TokenKind Kind, StringRef Str, int64_t IntVal = 0)
79 : Kind(Kind), Str(Str), IntVal(64, IntVal, true) {}
80
81 TokenKind getKind() const { return Kind; }
82 bool is(TokenKind K) const { return Kind == K; }
33
Assuming 'K' is not equal to field 'Kind'
34
Returning zero, which participates in a condition later
41
Assuming 'K' is not equal to field 'Kind'
42
Returning zero, which participates in a condition later
49
Assuming 'K' is not equal to field 'Kind'
50
Returning zero, which participates in a condition later
57
Assuming 'K' is not equal to field 'Kind'
58
Returning zero, which participates in a condition later
65
Assuming 'K' is not equal to field 'Kind'
66
Returning zero, which participates in a condition later
83 bool isNot(TokenKind K) const { return Kind != K; }
84
85 SMLoc getLoc() const;
86 SMLoc getEndLoc() const;
87 SMRange getLocRange() const;
88
89 /// Get the contents of a string token (without quotes).
90 StringRef getStringContents() const {
91 assert(Kind == String && "This token isn't a string!")((Kind == String && "This token isn't a string!") ? static_cast
<void> (0) : __assert_fail ("Kind == String && \"This token isn't a string!\""
, "/build/llvm-toolchain-snapshot-13~++20210306111116+7ae191f59f0f/llvm/include/llvm/MC/MCAsmMacro.h"
, 91, __PRETTY_FUNCTION__))
;
92 return Str.slice(1, Str.size() - 1);
93 }
94
95 /// Get the identifier string for the current token, which should be an
96 /// identifier or a string. This gets the portion of the string which should
97 /// be used as the identifier, e.g., it does not include the quotes on
98 /// strings.
99 StringRef getIdentifier() const {
100 if (Kind == Identifier)
101 return getString();
102 return getStringContents();
103 }
104
105 /// Get the string for the current token, this includes all characters (for
106 /// example, the quotes on strings) in the token.
107 ///
108 /// The returned StringRef points into the source manager's memory buffer, and
109 /// is safe to store across calls to Lex().
110 StringRef getString() const { return Str; }
111
112 // FIXME: Don't compute this in advance, it makes every token larger, and is
113 // also not generally what we want (it is nicer for recovery etc. to lex 123br
114 // as a single token, then diagnose as an invalid number).
115 int64_t getIntVal() const {
116 assert(Kind == Integer && "This token isn't an integer!")((Kind == Integer && "This token isn't an integer!") ?
static_cast<void> (0) : __assert_fail ("Kind == Integer && \"This token isn't an integer!\""
, "/build/llvm-toolchain-snapshot-13~++20210306111116+7ae191f59f0f/llvm/include/llvm/MC/MCAsmMacro.h"
, 116, __PRETTY_FUNCTION__))
;
117 return IntVal.getZExtValue();
118 }
119
120 APInt getAPIntVal() const {
121 assert((Kind == Integer || Kind == BigNum) &&(((Kind == Integer || Kind == BigNum) && "This token isn't an integer!"
) ? static_cast<void> (0) : __assert_fail ("(Kind == Integer || Kind == BigNum) && \"This token isn't an integer!\""
, "/build/llvm-toolchain-snapshot-13~++20210306111116+7ae191f59f0f/llvm/include/llvm/MC/MCAsmMacro.h"
, 122, __PRETTY_FUNCTION__))
122 "This token isn't an integer!")(((Kind == Integer || Kind == BigNum) && "This token isn't an integer!"
) ? static_cast<void> (0) : __assert_fail ("(Kind == Integer || Kind == BigNum) && \"This token isn't an integer!\""
, "/build/llvm-toolchain-snapshot-13~++20210306111116+7ae191f59f0f/llvm/include/llvm/MC/MCAsmMacro.h"
, 122, __PRETTY_FUNCTION__))
;
123 return IntVal;
124 }
125
126 void dump(raw_ostream &OS) const;
127};
128
129struct MCAsmMacroParameter {
130 StringRef Name;
131 std::vector<AsmToken> Value;
132 bool Required = false;
133 bool Vararg = false;
134
135#if !defined(NDEBUG) || defined(LLVM_ENABLE_DUMP)
136 void dump() const { dump(dbgs()); }
137 LLVM_DUMP_METHOD__attribute__((noinline)) __attribute__((__used__)) void dump(raw_ostream &OS) const;
138#endif
139};
140
141typedef std::vector<MCAsmMacroParameter> MCAsmMacroParameters;
142struct MCAsmMacro {
143 StringRef Name;
144 StringRef Body;
145 MCAsmMacroParameters Parameters;
146 std::vector<std::string> Locals;
147 bool IsFunction = false;
148
149public:
150 MCAsmMacro(StringRef N, StringRef B, MCAsmMacroParameters P)
151 : Name(N), Body(B), Parameters(std::move(P)) {}
152 MCAsmMacro(StringRef N, StringRef B, MCAsmMacroParameters P,
153 std::vector<std::string> L, bool F)
154 : Name(N), Body(B), Parameters(std::move(P)), Locals(std::move(L)),
155 IsFunction(F) {}
156
157#if !defined(NDEBUG) || defined(LLVM_ENABLE_DUMP)
158 void dump() const { dump(dbgs()); }
159 LLVM_DUMP_METHOD__attribute__((noinline)) __attribute__((__used__)) void dump(raw_ostream &OS) const;
160#endif
161};
162} // namespace llvm
163
164#endif