Bug Summary

File:llvm/lib/MC/MCParser/AsmParser.cpp
Warning:line 5853, 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 -fno-split-dwarf-inlining -debugger-tuning=gdb -ffunction-sections -fdata-sections -resource-dir /usr/lib/llvm-12/lib/clang/12.0.0 -D _DEBUG -D _GNU_SOURCE -D __STDC_CONSTANT_MACROS -D __STDC_FORMAT_MACROS -D __STDC_LIMIT_MACROS -I /build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/build-llvm/lib/MC/MCParser -I /build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/lib/MC/MCParser -I /build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/build-llvm/include -I /build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/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-12/lib/clang/12.0.0/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-12~++20210115100614+a14c36fe27f5/build-llvm/lib/MC/MCParser -fdebug-prefix-map=/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5=. -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-2021-01-16-002530-32805-1 -x c++ /build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/lib/MC/MCParser/AsmParser.cpp

/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/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-12~++20210115100614+a14c36fe27f5/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-12~++20210115100614+a14c36fe27f5/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-12~++20210115100614+a14c36fe27f5/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-12~++20210115100614+a14c36fe27f5/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-12~++20210115100614+a14c36fe27f5/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-12~++20210115100614+a14c36fe27f5/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-12~++20210115100614+a14c36fe27f5/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-12~++20210115100614+a14c36fe27f5/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-12~++20210115100614+a14c36fe27f5/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-12~++20210115100614+a14c36fe27f5/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-12~++20210115100614+a14c36fe27f5/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-12~++20210115100614+a14c36fe27f5/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-12~++20210115100614+a14c36fe27f5/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-12~++20210115100614+a14c36fe27f5/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 const AsmParser *Parser = static_cast<const 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 || &DiagSrcMgr != &Parser->SrcMgr ||
2373 DiagBuf != CppHashBuf) {
2374 if (Parser->SavedDiagHandler)
2375 Parser->SavedDiagHandler(Diag, Parser->SavedDiagContext);
2376 else
2377 Diag.print(nullptr, OS);
2378 return;
2379 }
2380
2381 // Use the CppHashFilename and calculate a line number based on the
2382 // CppHashInfo.Loc and CppHashInfo.LineNumber relative to this Diag's SMLoc
2383 // for the diagnostic.
2384 const std::string &Filename = std::string(Parser->CppHashInfo.Filename);
2385
2386 int DiagLocLineNo = DiagSrcMgr.FindLineNumber(DiagLoc, DiagBuf);
2387 int CppHashLocLineNo =
2388 Parser->SrcMgr.FindLineNumber(Parser->CppHashInfo.Loc, CppHashBuf);
2389 int LineNo =
2390 Parser->CppHashInfo.LineNumber - 1 + (DiagLocLineNo - CppHashLocLineNo);
2391
2392 SMDiagnostic NewDiag(*Diag.getSourceMgr(), Diag.getLoc(), Filename, LineNo,
2393 Diag.getColumnNo(), Diag.getKind(), Diag.getMessage(),
2394 Diag.getLineContents(), Diag.getRanges());
2395
2396 if (Parser->SavedDiagHandler)
2397 Parser->SavedDiagHandler(NewDiag, Parser->SavedDiagContext);
2398 else
2399 NewDiag.print(nullptr, OS);
2400}
2401
2402// FIXME: This is mostly duplicated from the function in AsmLexer.cpp. The
2403// difference being that that function accepts '@' as part of identifiers and
2404// we can't do that. AsmLexer.cpp should probably be changed to handle
2405// '@' as a special case when needed.
2406static bool isIdentifierChar(char c) {
2407 return isalnum(static_cast<unsigned char>(c)) || c == '_' || c == '$' ||
2408 c == '.';
2409}
2410
2411bool AsmParser::expandMacro(raw_svector_ostream &OS, StringRef Body,
2412 ArrayRef<MCAsmMacroParameter> Parameters,
2413 ArrayRef<MCAsmMacroArgument> A,
2414 bool EnableAtPseudoVariable, SMLoc L) {
2415 unsigned NParameters = Parameters.size();
2416 bool HasVararg = NParameters ? Parameters.back().Vararg : false;
2417 if ((!IsDarwin || NParameters != 0) && NParameters != A.size())
2418 return Error(L, "Wrong number of arguments");
2419
2420 // A macro without parameters is handled differently on Darwin:
2421 // gas accepts no arguments and does no substitutions
2422 while (!Body.empty()) {
2423 // Scan for the next substitution.
2424 std::size_t End = Body.size(), Pos = 0;
2425 for (; Pos != End; ++Pos) {
2426 // Check for a substitution or escape.
2427 if (IsDarwin && !NParameters) {
2428 // This macro has no parameters, look for $0, $1, etc.
2429 if (Body[Pos] != '$' || Pos + 1 == End)
2430 continue;
2431
2432 char Next = Body[Pos + 1];
2433 if (Next == '$' || Next == 'n' ||
2434 isdigit(static_cast<unsigned char>(Next)))
2435 break;
2436 } else {
2437 // This macro has parameters, look for \foo, \bar, etc.
2438 if (Body[Pos] == '\\' && Pos + 1 != End)
2439 break;
2440 }
2441 }
2442
2443 // Add the prefix.
2444 OS << Body.slice(0, Pos);
2445
2446 // Check if we reached the end.
2447 if (Pos == End)
2448 break;
2449
2450 if (IsDarwin && !NParameters) {
2451 switch (Body[Pos + 1]) {
2452 // $$ => $
2453 case '$':
2454 OS << '$';
2455 break;
2456
2457 // $n => number of arguments
2458 case 'n':
2459 OS << A.size();
2460 break;
2461
2462 // $[0-9] => argument
2463 default: {
2464 // Missing arguments are ignored.
2465 unsigned Index = Body[Pos + 1] - '0';
2466 if (Index >= A.size())
2467 break;
2468
2469 // Otherwise substitute with the token values, with spaces eliminated.
2470 for (const AsmToken &Token : A[Index])
2471 OS << Token.getString();
2472 break;
2473 }
2474 }
2475 Pos += 2;
2476 } else {
2477 unsigned I = Pos + 1;
2478
2479 // Check for the \@ pseudo-variable.
2480 if (EnableAtPseudoVariable && Body[I] == '@' && I + 1 != End)
2481 ++I;
2482 else
2483 while (isIdentifierChar(Body[I]) && I + 1 != End)
2484 ++I;
2485
2486 const char *Begin = Body.data() + Pos + 1;
2487 StringRef Argument(Begin, I - (Pos + 1));
2488 unsigned Index = 0;
2489
2490 if (Argument == "@") {
2491 OS << NumOfMacroInstantiations;
2492 Pos += 2;
2493 } else {
2494 for (; Index < NParameters; ++Index)
2495 if (Parameters[Index].Name == Argument)
2496 break;
2497
2498 if (Index == NParameters) {
2499 if (Body[Pos + 1] == '(' && Body[Pos + 2] == ')')
2500 Pos += 3;
2501 else {
2502 OS << '\\' << Argument;
2503 Pos = I;
2504 }
2505 } else {
2506 bool VarargParameter = HasVararg && Index == (NParameters - 1);
2507 for (const AsmToken &Token : A[Index])
2508 // For altmacro mode, you can write '%expr'.
2509 // The prefix '%' evaluates the expression 'expr'
2510 // and uses the result as a string (e.g. replace %(1+2) with the
2511 // string "3").
2512 // Here, we identify the integer token which is the result of the
2513 // absolute expression evaluation and replace it with its string
2514 // representation.
2515 if (AltMacroMode && Token.getString().front() == '%' &&
2516 Token.is(AsmToken::Integer))
2517 // Emit an integer value to the buffer.
2518 OS << Token.getIntVal();
2519 // Only Token that was validated as a string and begins with '<'
2520 // is considered altMacroString!!!
2521 else if (AltMacroMode && Token.getString().front() == '<' &&
2522 Token.is(AsmToken::String)) {
2523 OS << angleBracketString(Token.getStringContents());
2524 }
2525 // We expect no quotes around the string's contents when
2526 // parsing for varargs.
2527 else if (Token.isNot(AsmToken::String) || VarargParameter)
2528 OS << Token.getString();
2529 else
2530 OS << Token.getStringContents();
2531
2532 Pos += 1 + Argument.size();
2533 }
2534 }
2535 }
2536 // Update the scan point.
2537 Body = Body.substr(Pos);
2538 }
2539
2540 return false;
2541}
2542
2543static bool isOperator(AsmToken::TokenKind kind) {
2544 switch (kind) {
2545 default:
2546 return false;
2547 case AsmToken::Plus:
2548 case AsmToken::Minus:
2549 case AsmToken::Tilde:
2550 case AsmToken::Slash:
2551 case AsmToken::Star:
2552 case AsmToken::Dot:
2553 case AsmToken::Equal:
2554 case AsmToken::EqualEqual:
2555 case AsmToken::Pipe:
2556 case AsmToken::PipePipe:
2557 case AsmToken::Caret:
2558 case AsmToken::Amp:
2559 case AsmToken::AmpAmp:
2560 case AsmToken::Exclaim:
2561 case AsmToken::ExclaimEqual:
2562 case AsmToken::Less:
2563 case AsmToken::LessEqual:
2564 case AsmToken::LessLess:
2565 case AsmToken::LessGreater:
2566 case AsmToken::Greater:
2567 case AsmToken::GreaterEqual:
2568 case AsmToken::GreaterGreater:
2569 return true;
2570 }
2571}
2572
2573namespace {
2574
2575class AsmLexerSkipSpaceRAII {
2576public:
2577 AsmLexerSkipSpaceRAII(AsmLexer &Lexer, bool SkipSpace) : Lexer(Lexer) {
2578 Lexer.setSkipSpace(SkipSpace);
2579 }
2580
2581 ~AsmLexerSkipSpaceRAII() {
2582 Lexer.setSkipSpace(true);
2583 }
2584
2585private:
2586 AsmLexer &Lexer;
2587};
2588
2589} // end anonymous namespace
2590
2591bool AsmParser::parseMacroArgument(MCAsmMacroArgument &MA, bool Vararg) {
2592
2593 if (Vararg) {
2594 if (Lexer.isNot(AsmToken::EndOfStatement)) {
2595 StringRef Str = parseStringToEndOfStatement();
2596 MA.emplace_back(AsmToken::String, Str);
2597 }
2598 return false;
2599 }
2600
2601 unsigned ParenLevel = 0;
2602
2603 // Darwin doesn't use spaces to delmit arguments.
2604 AsmLexerSkipSpaceRAII ScopedSkipSpace(Lexer, IsDarwin);
2605
2606 bool SpaceEaten;
2607
2608 while (true) {
2609 SpaceEaten = false;
2610 if (Lexer.is(AsmToken::Eof) || Lexer.is(AsmToken::Equal))
2611 return TokError("unexpected token in macro instantiation");
2612
2613 if (ParenLevel == 0) {
2614
2615 if (Lexer.is(AsmToken::Comma))
2616 break;
2617
2618 if (Lexer.is(AsmToken::Space)) {
2619 SpaceEaten = true;
2620 Lexer.Lex(); // Eat spaces
2621 }
2622
2623 // Spaces can delimit parameters, but could also be part an expression.
2624 // If the token after a space is an operator, add the token and the next
2625 // one into this argument
2626 if (!IsDarwin) {
2627 if (isOperator(Lexer.getKind())) {
2628 MA.push_back(getTok());
2629 Lexer.Lex();
2630
2631 // Whitespace after an operator can be ignored.
2632 if (Lexer.is(AsmToken::Space))
2633 Lexer.Lex();
2634
2635 continue;
2636 }
2637 }
2638 if (SpaceEaten)
2639 break;
2640 }
2641
2642 // handleMacroEntry relies on not advancing the lexer here
2643 // to be able to fill in the remaining default parameter values
2644 if (Lexer.is(AsmToken::EndOfStatement))
2645 break;
2646
2647 // Adjust the current parentheses level.
2648 if (Lexer.is(AsmToken::LParen))
2649 ++ParenLevel;
2650 else if (Lexer.is(AsmToken::RParen) && ParenLevel)
2651 --ParenLevel;
2652
2653 // Append the token to the current argument list.
2654 MA.push_back(getTok());
2655 Lexer.Lex();
2656 }
2657
2658 if (ParenLevel != 0)
2659 return TokError("unbalanced parentheses in macro argument");
2660 return false;
2661}
2662
2663// Parse the macro instantiation arguments.
2664bool AsmParser::parseMacroArguments(const MCAsmMacro *M,
2665 MCAsmMacroArguments &A) {
2666 const unsigned NParameters = M ? M->Parameters.size() : 0;
2667 bool NamedParametersFound = false;
2668 SmallVector<SMLoc, 4> FALocs;
2669
2670 A.resize(NParameters);
2671 FALocs.resize(NParameters);
2672
2673 // Parse two kinds of macro invocations:
2674 // - macros defined without any parameters accept an arbitrary number of them
2675 // - macros defined with parameters accept at most that many of them
2676 bool HasVararg = NParameters ? M->Parameters.back().Vararg : false;
2677 for (unsigned Parameter = 0; !NParameters || Parameter < NParameters;
2678 ++Parameter) {
2679 SMLoc IDLoc = Lexer.getLoc();
2680 MCAsmMacroParameter FA;
2681
2682 if (Lexer.is(AsmToken::Identifier) && Lexer.peekTok().is(AsmToken::Equal)) {
2683 if (parseIdentifier(FA.Name))
2684 return Error(IDLoc, "invalid argument identifier for formal argument");
2685
2686 if (Lexer.isNot(AsmToken::Equal))
2687 return TokError("expected '=' after formal parameter identifier");
2688
2689 Lex();
2690
2691 NamedParametersFound = true;
2692 }
2693 bool Vararg = HasVararg && Parameter == (NParameters - 1);
2694
2695 if (NamedParametersFound && FA.Name.empty())
2696 return Error(IDLoc, "cannot mix positional and keyword arguments");
2697
2698 SMLoc StrLoc = Lexer.getLoc();
2699 SMLoc EndLoc;
2700 if (AltMacroMode && Lexer.is(AsmToken::Percent)) {
2701 const MCExpr *AbsoluteExp;
2702 int64_t Value;
2703 /// Eat '%'
2704 Lex();
2705 if (parseExpression(AbsoluteExp, EndLoc))
2706 return false;
2707 if (!AbsoluteExp->evaluateAsAbsolute(Value,
2708 getStreamer().getAssemblerPtr()))
2709 return Error(StrLoc, "expected absolute expression");
2710 const char *StrChar = StrLoc.getPointer();
2711 const char *EndChar = EndLoc.getPointer();
2712 AsmToken newToken(AsmToken::Integer,
2713 StringRef(StrChar, EndChar - StrChar), Value);
2714 FA.Value.push_back(newToken);
2715 } else if (AltMacroMode && Lexer.is(AsmToken::Less) &&
2716 isAngleBracketString(StrLoc, EndLoc)) {
2717 const char *StrChar = StrLoc.getPointer();
2718 const char *EndChar = EndLoc.getPointer();
2719 jumpToLoc(EndLoc, CurBuffer);
2720 /// Eat from '<' to '>'
2721 Lex();
2722 AsmToken newToken(AsmToken::String,
2723 StringRef(StrChar, EndChar - StrChar));
2724 FA.Value.push_back(newToken);
2725 } else if(parseMacroArgument(FA.Value, Vararg))
2726 return true;
2727
2728 unsigned PI = Parameter;
2729 if (!FA.Name.empty()) {
2730 unsigned FAI = 0;
2731 for (FAI = 0; FAI < NParameters; ++FAI)
2732 if (M->Parameters[FAI].Name == FA.Name)
2733 break;
2734
2735 if (FAI >= NParameters) {
2736 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-12~++20210115100614+a14c36fe27f5/llvm/lib/MC/MCParser/AsmParser.cpp"
, 2736, __PRETTY_FUNCTION__))
;
2737 return Error(IDLoc, "parameter named '" + FA.Name +
2738 "' does not exist for macro '" + M->Name + "'");
2739 }
2740 PI = FAI;
2741 }
2742
2743 if (!FA.Value.empty()) {
2744 if (A.size() <= PI)
2745 A.resize(PI + 1);
2746 A[PI] = FA.Value;
2747
2748 if (FALocs.size() <= PI)
2749 FALocs.resize(PI + 1);
2750
2751 FALocs[PI] = Lexer.getLoc();
2752 }
2753
2754 // At the end of the statement, fill in remaining arguments that have
2755 // default values. If there aren't any, then the next argument is
2756 // required but missing
2757 if (Lexer.is(AsmToken::EndOfStatement)) {
2758 bool Failure = false;
2759 for (unsigned FAI = 0; FAI < NParameters; ++FAI) {
2760 if (A[FAI].empty()) {
2761 if (M->Parameters[FAI].Required) {
2762 Error(FALocs[FAI].isValid() ? FALocs[FAI] : Lexer.getLoc(),
2763 "missing value for required parameter "
2764 "'" + M->Parameters[FAI].Name + "' in macro '" + M->Name + "'");
2765 Failure = true;
2766 }
2767
2768 if (!M->Parameters[FAI].Value.empty())
2769 A[FAI] = M->Parameters[FAI].Value;
2770 }
2771 }
2772 return Failure;
2773 }
2774
2775 if (Lexer.is(AsmToken::Comma))
2776 Lex();
2777 }
2778
2779 return TokError("too many positional arguments");
2780}
2781
2782bool AsmParser::handleMacroEntry(const MCAsmMacro *M, SMLoc NameLoc) {
2783 // Arbitrarily limit macro nesting depth (default matches 'as'). We can
2784 // eliminate this, although we should protect against infinite loops.
2785 unsigned MaxNestingDepth = AsmMacroMaxNestingDepth;
2786 if (ActiveMacros.size() == MaxNestingDepth) {
2787 std::ostringstream MaxNestingDepthError;
2788 MaxNestingDepthError << "macros cannot be nested more than "
2789 << MaxNestingDepth << " levels deep."
2790 << " Use -asm-macro-max-nesting-depth to increase "
2791 "this limit.";
2792 return TokError(MaxNestingDepthError.str());
2793 }
2794
2795 MCAsmMacroArguments A;
2796 if (parseMacroArguments(M, A))
2797 return true;
2798
2799 // Macro instantiation is lexical, unfortunately. We construct a new buffer
2800 // to hold the macro body with substitutions.
2801 SmallString<256> Buf;
2802 StringRef Body = M->Body;
2803 raw_svector_ostream OS(Buf);
2804
2805 if (expandMacro(OS, Body, M->Parameters, A, true, getTok().getLoc()))
2806 return true;
2807
2808 // We include the .endmacro in the buffer as our cue to exit the macro
2809 // instantiation.
2810 OS << ".endmacro\n";
2811
2812 std::unique_ptr<MemoryBuffer> Instantiation =
2813 MemoryBuffer::getMemBufferCopy(OS.str(), "<instantiation>");
2814
2815 // Create the macro instantiation object and add to the current macro
2816 // instantiation stack.
2817 MacroInstantiation *MI = new MacroInstantiation{
2818 NameLoc, CurBuffer, getTok().getLoc(), TheCondStack.size()};
2819 ActiveMacros.push_back(MI);
2820
2821 ++NumOfMacroInstantiations;
2822
2823 // Jump to the macro instantiation and prime the lexer.
2824 CurBuffer = SrcMgr.AddNewSourceBuffer(std::move(Instantiation), SMLoc());
2825 Lexer.setBuffer(SrcMgr.getMemoryBuffer(CurBuffer)->getBuffer());
2826 Lex();
2827
2828 return false;
2829}
2830
2831void AsmParser::handleMacroExit() {
2832 // Jump to the EndOfStatement we should return to, and consume it.
2833 jumpToLoc(ActiveMacros.back()->ExitLoc, ActiveMacros.back()->ExitBuffer);
2834 Lex();
2835
2836 // Pop the instantiation entry.
2837 delete ActiveMacros.back();
2838 ActiveMacros.pop_back();
2839}
2840
2841bool AsmParser::parseAssignment(StringRef Name, bool allow_redef,
2842 bool NoDeadStrip) {
2843 MCSymbol *Sym;
2844 const MCExpr *Value;
2845 if (MCParserUtils::parseAssignmentExpression(Name, allow_redef, *this, Sym,
2846 Value))
2847 return true;
2848
2849 if (!Sym) {
2850 // In the case where we parse an expression starting with a '.', we will
2851 // not generate an error, nor will we create a symbol. In this case we
2852 // should just return out.
2853 return false;
2854 }
2855
2856 // Do the assignment.
2857 Out.emitAssignment(Sym, Value);
2858 if (NoDeadStrip)
2859 Out.emitSymbolAttribute(Sym, MCSA_NoDeadStrip);
2860
2861 return false;
2862}
2863
2864/// parseIdentifier:
2865/// ::= identifier
2866/// ::= string
2867bool AsmParser::parseIdentifier(StringRef &Res) {
2868 // The assembler has relaxed rules for accepting identifiers, in particular we
2869 // allow things like '.globl $foo' and '.def @feat.00', which would normally be
2870 // separate tokens. At this level, we have already lexed so we cannot (currently)
2871 // handle this as a context dependent token, instead we detect adjacent tokens
2872 // and return the combined identifier.
2873 if (Lexer.is(AsmToken::Dollar) || Lexer.is(AsmToken::At)) {
2874 SMLoc PrefixLoc = getLexer().getLoc();
2875
2876 // Consume the prefix character, and check for a following identifier.
2877
2878 AsmToken Buf[1];
2879 Lexer.peekTokens(Buf, false);
2880
2881 if (Buf[0].isNot(AsmToken::Identifier) && Buf[0].isNot(AsmToken::Integer))
2882 return true;
2883
2884 // We have a '$' or '@' followed by an identifier or integer token, make
2885 // sure they are adjacent.
2886 if (PrefixLoc.getPointer() + 1 != Buf[0].getLoc().getPointer())
2887 return true;
2888
2889 // eat $ or @
2890 Lexer.Lex(); // Lexer's Lex guarantees consecutive token.
2891 // Construct the joined identifier and consume the token.
2892 Res = StringRef(PrefixLoc.getPointer(), getTok().getString().size() + 1);
2893 Lex(); // Parser Lex to maintain invariants.
2894 return false;
2895 }
2896
2897 if (Lexer.isNot(AsmToken::Identifier) && Lexer.isNot(AsmToken::String))
2898 return true;
2899
2900 Res = getTok().getIdentifier();
2901
2902 Lex(); // Consume the identifier token.
2903
2904 return false;
2905}
2906
2907/// parseDirectiveSet:
2908/// ::= .equ identifier ',' expression
2909/// ::= .equiv identifier ',' expression
2910/// ::= .set identifier ',' expression
2911bool AsmParser::parseDirectiveSet(StringRef IDVal, bool allow_redef) {
2912 StringRef Name;
2913 if (check(parseIdentifier(Name), "expected identifier") ||
2914 parseToken(AsmToken::Comma) || parseAssignment(Name, allow_redef, true))
2915 return addErrorSuffix(" in '" + Twine(IDVal) + "' directive");
2916 return false;
2917}
2918
2919bool AsmParser::parseEscapedString(std::string &Data) {
2920 if (check(getTok().isNot(AsmToken::String), "expected string"))
2921 return true;
2922
2923 Data = "";
2924 StringRef Str = getTok().getStringContents();
2925 for (unsigned i = 0, e = Str.size(); i != e; ++i) {
2926 if (Str[i] != '\\') {
2927 Data += Str[i];
2928 continue;
2929 }
2930
2931 // Recognize escaped characters. Note that this escape semantics currently
2932 // loosely follows Darwin 'as'.
2933 ++i;
2934 if (i == e)
2935 return TokError("unexpected backslash at end of string");
2936
2937 // Recognize hex sequences similarly to GNU 'as'.
2938 if (Str[i] == 'x' || Str[i] == 'X') {
2939 size_t length = Str.size();
2940 if (i + 1 >= length || !isHexDigit(Str[i + 1]))
2941 return TokError("invalid hexadecimal escape sequence");
2942
2943 // Consume hex characters. GNU 'as' reads all hexadecimal characters and
2944 // then truncates to the lower 16 bits. Seems reasonable.
2945 unsigned Value = 0;
2946 while (i + 1 < length && isHexDigit(Str[i + 1]))
2947 Value = Value * 16 + hexDigitValue(Str[++i]);
2948
2949 Data += (unsigned char)(Value & 0xFF);
2950 continue;
2951 }
2952
2953 // Recognize octal sequences.
2954 if ((unsigned)(Str[i] - '0') <= 7) {
2955 // Consume up to three octal characters.
2956 unsigned Value = Str[i] - '0';
2957
2958 if (i + 1 != e && ((unsigned)(Str[i + 1] - '0')) <= 7) {
2959 ++i;
2960 Value = Value * 8 + (Str[i] - '0');
2961
2962 if (i + 1 != e && ((unsigned)(Str[i + 1] - '0')) <= 7) {
2963 ++i;
2964 Value = Value * 8 + (Str[i] - '0');
2965 }
2966 }
2967
2968 if (Value > 255)
2969 return TokError("invalid octal escape sequence (out of range)");
2970
2971 Data += (unsigned char)Value;
2972 continue;
2973 }
2974
2975 // Otherwise recognize individual escapes.
2976 switch (Str[i]) {
2977 default:
2978 // Just reject invalid escape sequences for now.
2979 return TokError("invalid escape sequence (unrecognized character)");
2980
2981 case 'b': Data += '\b'; break;
2982 case 'f': Data += '\f'; break;
2983 case 'n': Data += '\n'; break;
2984 case 'r': Data += '\r'; break;
2985 case 't': Data += '\t'; break;
2986 case '"': Data += '"'; break;
2987 case '\\': Data += '\\'; break;
2988 }
2989 }
2990
2991 Lex();
2992 return false;
2993}
2994
2995bool AsmParser::parseAngleBracketString(std::string &Data) {
2996 SMLoc EndLoc, StartLoc = getTok().getLoc();
2997 if (isAngleBracketString(StartLoc, EndLoc)) {
2998 const char *StartChar = StartLoc.getPointer() + 1;
2999 const char *EndChar = EndLoc.getPointer() - 1;
3000 jumpToLoc(EndLoc, CurBuffer);
3001 /// Eat from '<' to '>'
3002 Lex();
3003
3004 Data = angleBracketString(StringRef(StartChar, EndChar - StartChar));
3005 return false;
3006 }
3007 return true;
3008}
3009
3010/// parseDirectiveAscii:
3011// ::= .ascii [ "string"+ ( , "string"+ )* ]
3012/// ::= ( .asciz | .string ) [ "string" ( , "string" )* ]
3013bool AsmParser::parseDirectiveAscii(StringRef IDVal, bool ZeroTerminated) {
3014 auto parseOp = [&]() -> bool {
3015 std::string Data;
3016 if (checkForValidSection())
3017 return true;
3018 // Only support spaces as separators for .ascii directive for now. See the
3019 // discusssion at https://reviews.llvm.org/D91460 for more details.
3020 do {
3021 if (parseEscapedString(Data))
3022 return true;
3023 getStreamer().emitBytes(Data);
3024 } while (!ZeroTerminated && getTok().is(AsmToken::String));
3025 if (ZeroTerminated)
3026 getStreamer().emitBytes(StringRef("\0", 1));
3027 return false;
3028 };
3029
3030 if (parseMany(parseOp))
3031 return addErrorSuffix(" in '" + Twine(IDVal) + "' directive");
3032 return false;
3033}
3034
3035/// parseDirectiveReloc
3036/// ::= .reloc expression , identifier [ , expression ]
3037bool AsmParser::parseDirectiveReloc(SMLoc DirectiveLoc) {
3038 const MCExpr *Offset;
3039 const MCExpr *Expr = nullptr;
3040 SMLoc OffsetLoc = Lexer.getTok().getLoc();
3041
3042 if (parseExpression(Offset))
3043 return true;
3044 if (parseToken(AsmToken::Comma, "expected comma") ||
3045 check(getTok().isNot(AsmToken::Identifier), "expected relocation name"))
3046 return true;
3047
3048 SMLoc NameLoc = Lexer.getTok().getLoc();
3049 StringRef Name = Lexer.getTok().getIdentifier();
3050 Lex();
3051
3052 if (Lexer.is(AsmToken::Comma)) {
3053 Lex();
3054 SMLoc ExprLoc = Lexer.getLoc();
3055 if (parseExpression(Expr))
3056 return true;
3057
3058 MCValue Value;
3059 if (!Expr->evaluateAsRelocatable(Value, nullptr, nullptr))
3060 return Error(ExprLoc, "expression must be relocatable");
3061 }
3062
3063 if (parseToken(AsmToken::EndOfStatement,
3064 "unexpected token in .reloc directive"))
3065 return true;
3066
3067 const MCTargetAsmParser &MCT = getTargetParser();
3068 const MCSubtargetInfo &STI = MCT.getSTI();
3069 if (Optional<std::pair<bool, std::string>> Err =
3070 getStreamer().emitRelocDirective(*Offset, Name, Expr, DirectiveLoc,
3071 STI))
3072 return Error(Err->first ? NameLoc : OffsetLoc, Err->second);
3073
3074 return false;
3075}
3076
3077/// parseDirectiveValue
3078/// ::= (.byte | .short | ... ) [ expression (, expression)* ]
3079bool AsmParser::parseDirectiveValue(StringRef IDVal, unsigned Size) {
3080 auto parseOp = [&]() -> bool {
3081 const MCExpr *Value;
3082 SMLoc ExprLoc = getLexer().getLoc();
3083 if (checkForValidSection() || parseExpression(Value))
3084 return true;
3085 // Special case constant expressions to match code generator.
3086 if (const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Value)) {
3087 assert(Size <= 8 && "Invalid size")((Size <= 8 && "Invalid size") ? static_cast<void
> (0) : __assert_fail ("Size <= 8 && \"Invalid size\""
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/lib/MC/MCParser/AsmParser.cpp"
, 3087, __PRETTY_FUNCTION__))
;
3088 uint64_t IntValue = MCE->getValue();
3089 if (!isUIntN(8 * Size, IntValue) && !isIntN(8 * Size, IntValue))
3090 return Error(ExprLoc, "out of range literal value");
3091 getStreamer().emitIntValue(IntValue, Size);
3092 } else
3093 getStreamer().emitValue(Value, Size, ExprLoc);
3094 return false;
3095 };
3096
3097 if (parseMany(parseOp))
3098 return addErrorSuffix(" in '" + Twine(IDVal) + "' directive");
3099 return false;
3100}
3101
3102static bool parseHexOcta(AsmParser &Asm, uint64_t &hi, uint64_t &lo) {
3103 if (Asm.getTok().isNot(AsmToken::Integer) &&
3104 Asm.getTok().isNot(AsmToken::BigNum))
3105 return Asm.TokError("unknown token in expression");
3106 SMLoc ExprLoc = Asm.getTok().getLoc();
3107 APInt IntValue = Asm.getTok().getAPIntVal();
3108 Asm.Lex();
3109 if (!IntValue.isIntN(128))
3110 return Asm.Error(ExprLoc, "out of range literal value");
3111 if (!IntValue.isIntN(64)) {
3112 hi = IntValue.getHiBits(IntValue.getBitWidth() - 64).getZExtValue();
3113 lo = IntValue.getLoBits(64).getZExtValue();
3114 } else {
3115 hi = 0;
3116 lo = IntValue.getZExtValue();
3117 }
3118 return false;
3119}
3120
3121/// ParseDirectiveOctaValue
3122/// ::= .octa [ hexconstant (, hexconstant)* ]
3123
3124bool AsmParser::parseDirectiveOctaValue(StringRef IDVal) {
3125 auto parseOp = [&]() -> bool {
3126 if (checkForValidSection())
3127 return true;
3128 uint64_t hi, lo;
3129 if (parseHexOcta(*this, hi, lo))
3130 return true;
3131 if (MAI.isLittleEndian()) {
3132 getStreamer().emitInt64(lo);
3133 getStreamer().emitInt64(hi);
3134 } else {
3135 getStreamer().emitInt64(hi);
3136 getStreamer().emitInt64(lo);
3137 }
3138 return false;
3139 };
3140
3141 if (parseMany(parseOp))
3142 return addErrorSuffix(" in '" + Twine(IDVal) + "' directive");
3143 return false;
3144}
3145
3146bool AsmParser::parseRealValue(const fltSemantics &Semantics, APInt &Res) {
3147 // We don't truly support arithmetic on floating point expressions, so we
3148 // have to manually parse unary prefixes.
3149 bool IsNeg = false;
3150 if (getLexer().is(AsmToken::Minus)) {
3151 Lexer.Lex();
3152 IsNeg = true;
3153 } else if (getLexer().is(AsmToken::Plus))
3154 Lexer.Lex();
3155
3156 if (Lexer.is(AsmToken::Error))
3157 return TokError(Lexer.getErr());
3158 if (Lexer.isNot(AsmToken::Integer) && Lexer.isNot(AsmToken::Real) &&
3159 Lexer.isNot(AsmToken::Identifier))
3160 return TokError("unexpected token in directive");
3161
3162 // Convert to an APFloat.
3163 APFloat Value(Semantics);
3164 StringRef IDVal = getTok().getString();
3165 if (getLexer().is(AsmToken::Identifier)) {
3166 if (!IDVal.compare_lower("infinity") || !IDVal.compare_lower("inf"))
3167 Value = APFloat::getInf(Semantics);
3168 else if (!IDVal.compare_lower("nan"))
3169 Value = APFloat::getNaN(Semantics, false, ~0);
3170 else
3171 return TokError("invalid floating point literal");
3172 } else if (errorToBool(
3173 Value.convertFromString(IDVal, APFloat::rmNearestTiesToEven)
3174 .takeError()))
3175 return TokError("invalid floating point literal");
3176 if (IsNeg)
3177 Value.changeSign();
3178
3179 // Consume the numeric token.
3180 Lex();
3181
3182 Res = Value.bitcastToAPInt();
3183
3184 return false;
3185}
3186
3187/// parseDirectiveRealValue
3188/// ::= (.single | .double) [ expression (, expression)* ]
3189bool AsmParser::parseDirectiveRealValue(StringRef IDVal,
3190 const fltSemantics &Semantics) {
3191 auto parseOp = [&]() -> bool {
3192 APInt AsInt;
3193 if (checkForValidSection() || parseRealValue(Semantics, AsInt))
3194 return true;
3195 getStreamer().emitIntValue(AsInt.getLimitedValue(),
3196 AsInt.getBitWidth() / 8);
3197 return false;
3198 };
3199
3200 if (parseMany(parseOp))
3201 return addErrorSuffix(" in '" + Twine(IDVal) + "' directive");
3202 return false;
3203}
3204
3205/// parseDirectiveZero
3206/// ::= .zero expression
3207bool AsmParser::parseDirectiveZero() {
3208 SMLoc NumBytesLoc = Lexer.getLoc();
3209 const MCExpr *NumBytes;
3210 if (checkForValidSection() || parseExpression(NumBytes))
3211 return true;
3212
3213 int64_t Val = 0;
3214 if (getLexer().is(AsmToken::Comma)) {
3215 Lex();
3216 if (parseAbsoluteExpression(Val))
3217 return true;
3218 }
3219
3220 if (parseToken(AsmToken::EndOfStatement,
3221 "unexpected token in '.zero' directive"))
3222 return true;
3223 getStreamer().emitFill(*NumBytes, Val, NumBytesLoc);
3224
3225 return false;
3226}
3227
3228/// parseDirectiveFill
3229/// ::= .fill expression [ , expression [ , expression ] ]
3230bool AsmParser::parseDirectiveFill() {
3231 SMLoc NumValuesLoc = Lexer.getLoc();
3232 const MCExpr *NumValues;
3233 if (checkForValidSection() || parseExpression(NumValues))
3234 return true;
3235
3236 int64_t FillSize = 1;
3237 int64_t FillExpr = 0;
3238
3239 SMLoc SizeLoc, ExprLoc;
3240
3241 if (parseOptionalToken(AsmToken::Comma)) {
3242 SizeLoc = getTok().getLoc();
3243 if (parseAbsoluteExpression(FillSize))
3244 return true;
3245 if (parseOptionalToken(AsmToken::Comma)) {
3246 ExprLoc = getTok().getLoc();
3247 if (parseAbsoluteExpression(FillExpr))
3248 return true;
3249 }
3250 }
3251 if (parseToken(AsmToken::EndOfStatement,
3252 "unexpected token in '.fill' directive"))
3253 return true;
3254
3255 if (FillSize < 0) {
3256 Warning(SizeLoc, "'.fill' directive with negative size has no effect");
3257 return false;
3258 }
3259 if (FillSize > 8) {
3260 Warning(SizeLoc, "'.fill' directive with size greater than 8 has been truncated to 8");
3261 FillSize = 8;
3262 }
3263
3264 if (!isUInt<32>(FillExpr) && FillSize > 4)
3265 Warning(ExprLoc, "'.fill' directive pattern has been truncated to 32-bits");
3266
3267 getStreamer().emitFill(*NumValues, FillSize, FillExpr, NumValuesLoc);
3268
3269 return false;
3270}
3271
3272/// parseDirectiveOrg
3273/// ::= .org expression [ , expression ]
3274bool AsmParser::parseDirectiveOrg() {
3275 const MCExpr *Offset;
3276 SMLoc OffsetLoc = Lexer.getLoc();
3277 if (checkForValidSection() || parseExpression(Offset))
3278 return true;
3279
3280 // Parse optional fill expression.
3281 int64_t FillExpr = 0;
3282 if (parseOptionalToken(AsmToken::Comma))
3283 if (parseAbsoluteExpression(FillExpr))
3284 return addErrorSuffix(" in '.org' directive");
3285 if (parseToken(AsmToken::EndOfStatement))
3286 return addErrorSuffix(" in '.org' directive");
3287
3288 getStreamer().emitValueToOffset(Offset, FillExpr, OffsetLoc);
3289 return false;
3290}
3291
3292/// parseDirectiveAlign
3293/// ::= {.align, ...} expression [ , expression [ , expression ]]
3294bool AsmParser::parseDirectiveAlign(bool IsPow2, unsigned ValueSize) {
3295 SMLoc AlignmentLoc = getLexer().getLoc();
3296 int64_t Alignment;
3297 SMLoc MaxBytesLoc;
3298 bool HasFillExpr = false;
3299 int64_t FillExpr = 0;
3300 int64_t MaxBytesToFill = 0;
3301
3302 auto parseAlign = [&]() -> bool {
3303 if (parseAbsoluteExpression(Alignment))
3304 return true;
3305 if (parseOptionalToken(AsmToken::Comma)) {
3306 // The fill expression can be omitted while specifying a maximum number of
3307 // alignment bytes, e.g:
3308 // .align 3,,4
3309 if (getTok().isNot(AsmToken::Comma)) {
3310 HasFillExpr = true;
3311 if (parseAbsoluteExpression(FillExpr))
3312 return true;
3313 }
3314 if (parseOptionalToken(AsmToken::Comma))
3315 if (parseTokenLoc(MaxBytesLoc) ||
3316 parseAbsoluteExpression(MaxBytesToFill))
3317 return true;
3318 }
3319 return parseToken(AsmToken::EndOfStatement);
3320 };
3321
3322 if (checkForValidSection())
3323 return addErrorSuffix(" in directive");
3324 // Ignore empty '.p2align' directives for GNU-as compatibility
3325 if (IsPow2 && (ValueSize == 1) && getTok().is(AsmToken::EndOfStatement)) {
3326 Warning(AlignmentLoc, "p2align directive with no operand(s) is ignored");
3327 return parseToken(AsmToken::EndOfStatement);
3328 }
3329 if (parseAlign())
3330 return addErrorSuffix(" in directive");
3331
3332 // Always emit an alignment here even if we thrown an error.
3333 bool ReturnVal = false;
3334
3335 // Compute alignment in bytes.
3336 if (IsPow2) {
3337 // FIXME: Diagnose overflow.
3338 if (Alignment >= 32) {
3339 ReturnVal |= Error(AlignmentLoc, "invalid alignment value");
3340 Alignment = 31;
3341 }
3342
3343 Alignment = 1ULL << Alignment;
3344 } else {
3345 // Reject alignments that aren't either a power of two or zero,
3346 // for gas compatibility. Alignment of zero is silently rounded
3347 // up to one.
3348 if (Alignment == 0)
3349 Alignment = 1;
3350 if (!isPowerOf2_64(Alignment))
3351 ReturnVal |= Error(AlignmentLoc, "alignment must be a power of 2");
3352 if (!isUInt<32>(Alignment))
3353 ReturnVal |= Error(AlignmentLoc, "alignment must be smaller than 2**32");
3354 }
3355
3356 // Diagnose non-sensical max bytes to align.
3357 if (MaxBytesLoc.isValid()) {
3358 if (MaxBytesToFill < 1) {
3359 ReturnVal |= Error(MaxBytesLoc,
3360 "alignment directive can never be satisfied in this "
3361 "many bytes, ignoring maximum bytes expression");
3362 MaxBytesToFill = 0;
3363 }
3364
3365 if (MaxBytesToFill >= Alignment) {
3366 Warning(MaxBytesLoc, "maximum bytes expression exceeds alignment and "
3367 "has no effect");
3368 MaxBytesToFill = 0;
3369 }
3370 }
3371
3372 // Check whether we should use optimal code alignment for this .align
3373 // directive.
3374 const MCSection *Section = getStreamer().getCurrentSectionOnly();
3375 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-12~++20210115100614+a14c36fe27f5/llvm/lib/MC/MCParser/AsmParser.cpp"
, 3375, __PRETTY_FUNCTION__))
;
3376 bool UseCodeAlign = Section->UseCodeAlign();
3377 if ((!HasFillExpr || Lexer.getMAI().getTextAlignFillValue() == FillExpr) &&
3378 ValueSize == 1 && UseCodeAlign) {
3379 getStreamer().emitCodeAlignment(Alignment, MaxBytesToFill);
3380 } else {
3381 // FIXME: Target specific behavior about how the "extra" bytes are filled.
3382 getStreamer().emitValueToAlignment(Alignment, FillExpr, ValueSize,
3383 MaxBytesToFill);
3384 }
3385
3386 return ReturnVal;
3387}
3388
3389/// parseDirectiveFile
3390/// ::= .file filename
3391/// ::= .file number [directory] filename [md5 checksum] [source source-text]
3392bool AsmParser::parseDirectiveFile(SMLoc DirectiveLoc) {
3393 // FIXME: I'm not sure what this is.
3394 int64_t FileNumber = -1;
3395 if (getLexer().is(AsmToken::Integer)) {
3396 FileNumber = getTok().getIntVal();
3397 Lex();
3398
3399 if (FileNumber < 0)
3400 return TokError("negative file number");
3401 }
3402
3403 std::string Path;
3404
3405 // Usually the directory and filename together, otherwise just the directory.
3406 // Allow the strings to have escaped octal character sequence.
3407 if (check(getTok().isNot(AsmToken::String),
3408 "unexpected token in '.file' directive") ||
3409 parseEscapedString(Path))
3410 return true;
3411
3412 StringRef Directory;
3413 StringRef Filename;
3414 std::string FilenameData;
3415 if (getLexer().is(AsmToken::String)) {
3416 if (check(FileNumber == -1,
3417 "explicit path specified, but no file number") ||
3418 parseEscapedString(FilenameData))
3419 return true;
3420 Filename = FilenameData;
3421 Directory = Path;
3422 } else {
3423 Filename = Path;
3424 }
3425
3426 uint64_t MD5Hi, MD5Lo;
3427 bool HasMD5 = false;
3428
3429 Optional<StringRef> Source;
3430 bool HasSource = false;
3431 std::string SourceString;
3432
3433 while (!parseOptionalToken(AsmToken::EndOfStatement)) {
3434 StringRef Keyword;
3435 if (check(getTok().isNot(AsmToken::Identifier),
3436 "unexpected token in '.file' directive") ||
3437 parseIdentifier(Keyword))
3438 return true;
3439 if (Keyword == "md5") {
3440 HasMD5 = true;
3441 if (check(FileNumber == -1,
3442 "MD5 checksum specified, but no file number") ||
3443 parseHexOcta(*this, MD5Hi, MD5Lo))
3444 return true;
3445 } else if (Keyword == "source") {
3446 HasSource = true;
3447 if (check(FileNumber == -1,
3448 "source specified, but no file number") ||
3449 check(getTok().isNot(AsmToken::String),
3450 "unexpected token in '.file' directive") ||
3451 parseEscapedString(SourceString))
3452 return true;
3453 } else {
3454 return TokError("unexpected token in '.file' directive");
3455 }
3456 }
3457
3458 if (FileNumber == -1) {
3459 // Ignore the directive if there is no number and the target doesn't support
3460 // numberless .file directives. This allows some portability of assembler
3461 // between different object file formats.
3462 if (getContext().getAsmInfo()->hasSingleParameterDotFile())
3463 getStreamer().emitFileDirective(Filename);
3464 } else {
3465 // In case there is a -g option as well as debug info from directive .file,
3466 // we turn off the -g option, directly use the existing debug info instead.
3467 // Throw away any implicit file table for the assembler source.
3468 if (Ctx.getGenDwarfForAssembly()) {
3469 Ctx.getMCDwarfLineTable(0).resetFileTable();
3470 Ctx.setGenDwarfForAssembly(false);
3471 }
3472
3473 Optional<MD5::MD5Result> CKMem;
3474 if (HasMD5) {
3475 MD5::MD5Result Sum;
3476 for (unsigned i = 0; i != 8; ++i) {
3477 Sum.Bytes[i] = uint8_t(MD5Hi >> ((7 - i) * 8));
3478 Sum.Bytes[i + 8] = uint8_t(MD5Lo >> ((7 - i) * 8));
3479 }
3480 CKMem = Sum;
3481 }
3482 if (HasSource) {
3483 char *SourceBuf = static_cast<char *>(Ctx.allocate(SourceString.size()));
3484 memcpy(SourceBuf, SourceString.data(), SourceString.size());
3485 Source = StringRef(SourceBuf, SourceString.size());
3486 }
3487 if (FileNumber == 0) {
3488 if (Ctx.getDwarfVersion() < 5)
3489 return Warning(DirectiveLoc, "file 0 not supported prior to DWARF-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 (parseIdentifier(Name))
4076 return TokError("Expected an identifier");
4077
4078 if (Name == ".eh_frame")
4079 EH = true;
4080 else if (Name == ".debug_frame")
4081 Debug = true;
4082
4083 if (getLexer().is(AsmToken::Comma)) {
4084 Lex();
4085
4086 if (parseIdentifier(Name))
4087 return TokError("Expected an identifier");
4088
4089 if (Name == ".eh_frame")
4090 EH = true;
4091 else if (Name == ".debug_frame")
4092 Debug = true;
4093 }
4094
4095 if (parseToken(AsmToken::EndOfStatement))
4096 return addErrorSuffix(" in '.cfi_sections' directive");
4097
4098 getStreamer().emitCFISections(EH, Debug);
4099 return false;
4100}
4101
4102/// parseDirectiveCFIStartProc
4103/// ::= .cfi_startproc [simple]
4104bool AsmParser::parseDirectiveCFIStartProc() {
4105 StringRef Simple;
4106 if (!parseOptionalToken(AsmToken::EndOfStatement)) {
4107 if (check(parseIdentifier(Simple) || Simple != "simple",
4108 "unexpected token") ||
4109 parseToken(AsmToken::EndOfStatement))
4110 return addErrorSuffix(" in '.cfi_startproc' directive");
4111 }
4112
4113 // TODO(kristina): Deal with a corner case of incorrect diagnostic context
4114 // being produced if this directive is emitted as part of preprocessor macro
4115 // expansion which can *ONLY* happen if Clang's cc1as is the API consumer.
4116 // Tools like llvm-mc on the other hand are not affected by it, and report
4117 // correct context information.
4118 getStreamer().emitCFIStartProc(!Simple.empty(), Lexer.getLoc());
4119 return false;
4120}
4121
4122/// parseDirectiveCFIEndProc
4123/// ::= .cfi_endproc
4124bool AsmParser::parseDirectiveCFIEndProc() {
4125 if (parseToken(AsmToken::EndOfStatement))
4126 return addErrorSuffix(" in '.cfi_endproc' directive");
4127 getStreamer().emitCFIEndProc();
4128 return false;
4129}
4130
4131/// parse register name or number.
4132bool AsmParser::parseRegisterOrRegisterNumber(int64_t &Register,
4133 SMLoc DirectiveLoc) {
4134 unsigned RegNo;
4135
4136 if (getLexer().isNot(AsmToken::Integer)) {
4137 if (getTargetParser().ParseRegister(RegNo, DirectiveLoc, DirectiveLoc))
4138 return true;
4139 Register = getContext().getRegisterInfo()->getDwarfRegNum(RegNo, true);
4140 } else
4141 return parseAbsoluteExpression(Register);
4142
4143 return false;
4144}
4145
4146/// parseDirectiveCFIDefCfa
4147/// ::= .cfi_def_cfa register, offset
4148bool AsmParser::parseDirectiveCFIDefCfa(SMLoc DirectiveLoc) {
4149 int64_t Register = 0, Offset = 0;
4150 if (parseRegisterOrRegisterNumber(Register, DirectiveLoc) ||
4151 parseToken(AsmToken::Comma, "unexpected token in directive") ||
4152 parseAbsoluteExpression(Offset))
4153 return true;
4154
4155 getStreamer().emitCFIDefCfa(Register, Offset);
4156 return false;
4157}
4158
4159/// parseDirectiveCFIDefCfaOffset
4160/// ::= .cfi_def_cfa_offset offset
4161bool AsmParser::parseDirectiveCFIDefCfaOffset() {
4162 int64_t Offset = 0;
4163 if (parseAbsoluteExpression(Offset))
4164 return true;
4165
4166 getStreamer().emitCFIDefCfaOffset(Offset);
4167 return false;
4168}
4169
4170/// parseDirectiveCFIRegister
4171/// ::= .cfi_register register, register
4172bool AsmParser::parseDirectiveCFIRegister(SMLoc DirectiveLoc) {
4173 int64_t Register1 = 0, Register2 = 0;
4174 if (parseRegisterOrRegisterNumber(Register1, DirectiveLoc) ||
4175 parseToken(AsmToken::Comma, "unexpected token in directive") ||
4176 parseRegisterOrRegisterNumber(Register2, DirectiveLoc))
4177 return true;
4178
4179 getStreamer().emitCFIRegister(Register1, Register2);
4180 return false;
4181}
4182
4183/// parseDirectiveCFIWindowSave
4184/// ::= .cfi_window_save
4185bool AsmParser::parseDirectiveCFIWindowSave() {
4186 getStreamer().emitCFIWindowSave();
4187 return false;
4188}
4189
4190/// parseDirectiveCFIAdjustCfaOffset
4191/// ::= .cfi_adjust_cfa_offset adjustment
4192bool AsmParser::parseDirectiveCFIAdjustCfaOffset() {
4193 int64_t Adjustment = 0;
4194 if (parseAbsoluteExpression(Adjustment))
4195 return true;
4196
4197 getStreamer().emitCFIAdjustCfaOffset(Adjustment);
4198 return false;
4199}
4200
4201/// parseDirectiveCFIDefCfaRegister
4202/// ::= .cfi_def_cfa_register register
4203bool AsmParser::parseDirectiveCFIDefCfaRegister(SMLoc DirectiveLoc) {
4204 int64_t Register = 0;
4205 if (parseRegisterOrRegisterNumber(Register, DirectiveLoc))
4206 return true;
4207
4208 getStreamer().emitCFIDefCfaRegister(Register);
4209 return false;
4210}
4211
4212/// parseDirectiveCFIOffset
4213/// ::= .cfi_offset register, offset
4214bool AsmParser::parseDirectiveCFIOffset(SMLoc DirectiveLoc) {
4215 int64_t Register = 0;
4216 int64_t Offset = 0;
4217
4218 if (parseRegisterOrRegisterNumber(Register, DirectiveLoc) ||
4219 parseToken(AsmToken::Comma, "unexpected token in directive") ||
4220 parseAbsoluteExpression(Offset))
4221 return true;
4222
4223 getStreamer().emitCFIOffset(Register, Offset);
4224 return false;
4225}
4226
4227/// parseDirectiveCFIRelOffset
4228/// ::= .cfi_rel_offset register, offset
4229bool AsmParser::parseDirectiveCFIRelOffset(SMLoc DirectiveLoc) {
4230 int64_t Register = 0, Offset = 0;
4231
4232 if (parseRegisterOrRegisterNumber(Register, DirectiveLoc) ||
4233 parseToken(AsmToken::Comma, "unexpected token in directive") ||
4234 parseAbsoluteExpression(Offset))
4235 return true;
4236
4237 getStreamer().emitCFIRelOffset(Register, Offset);
4238 return false;
4239}
4240
4241static bool isValidEncoding(int64_t Encoding) {
4242 if (Encoding & ~0xff)
4243 return false;
4244
4245 if (Encoding == dwarf::DW_EH_PE_omit)
4246 return true;
4247
4248 const unsigned Format = Encoding & 0xf;
4249 if (Format != dwarf::DW_EH_PE_absptr && Format != dwarf::DW_EH_PE_udata2 &&
4250 Format != dwarf::DW_EH_PE_udata4 && Format != dwarf::DW_EH_PE_udata8 &&
4251 Format != dwarf::DW_EH_PE_sdata2 && Format != dwarf::DW_EH_PE_sdata4 &&
4252 Format != dwarf::DW_EH_PE_sdata8 && Format != dwarf::DW_EH_PE_signed)
4253 return false;
4254
4255 const unsigned Application = Encoding & 0x70;
4256 if (Application != dwarf::DW_EH_PE_absptr &&
4257 Application != dwarf::DW_EH_PE_pcrel)
4258 return false;
4259
4260 return true;
4261}
4262
4263/// parseDirectiveCFIPersonalityOrLsda
4264/// IsPersonality true for cfi_personality, false for cfi_lsda
4265/// ::= .cfi_personality encoding, [symbol_name]
4266/// ::= .cfi_lsda encoding, [symbol_name]
4267bool AsmParser::parseDirectiveCFIPersonalityOrLsda(bool IsPersonality) {
4268 int64_t Encoding = 0;
4269 if (parseAbsoluteExpression(Encoding))
4270 return true;
4271 if (Encoding == dwarf::DW_EH_PE_omit)
4272 return false;
4273
4274 StringRef Name;
4275 if (check(!isValidEncoding(Encoding), "unsupported encoding.") ||
4276 parseToken(AsmToken::Comma, "unexpected token in directive") ||
4277 check(parseIdentifier(Name), "expected identifier in directive"))
4278 return true;
4279
4280 MCSymbol *Sym = getContext().getOrCreateSymbol(Name);
4281
4282 if (IsPersonality)
4283 getStreamer().emitCFIPersonality(Sym, Encoding);
4284 else
4285 getStreamer().emitCFILsda(Sym, Encoding);
4286 return false;
4287}
4288
4289/// parseDirectiveCFIRememberState
4290/// ::= .cfi_remember_state
4291bool AsmParser::parseDirectiveCFIRememberState() {
4292 getStreamer().emitCFIRememberState();
4293 return false;
4294}
4295
4296/// parseDirectiveCFIRestoreState
4297/// ::= .cfi_remember_state
4298bool AsmParser::parseDirectiveCFIRestoreState() {
4299 getStreamer().emitCFIRestoreState();
4300 return false;
4301}
4302
4303/// parseDirectiveCFISameValue
4304/// ::= .cfi_same_value register
4305bool AsmParser::parseDirectiveCFISameValue(SMLoc DirectiveLoc) {
4306 int64_t Register = 0;
4307
4308 if (parseRegisterOrRegisterNumber(Register, DirectiveLoc))
4309 return true;
4310
4311 getStreamer().emitCFISameValue(Register);
4312 return false;
4313}
4314
4315/// parseDirectiveCFIRestore
4316/// ::= .cfi_restore register
4317bool AsmParser::parseDirectiveCFIRestore(SMLoc DirectiveLoc) {
4318 int64_t Register = 0;
4319 if (parseRegisterOrRegisterNumber(Register, DirectiveLoc))
4320 return true;
4321
4322 getStreamer().emitCFIRestore(Register);
4323 return false;
4324}
4325
4326/// parseDirectiveCFIEscape
4327/// ::= .cfi_escape expression[,...]
4328bool AsmParser::parseDirectiveCFIEscape() {
4329 std::string Values;
4330 int64_t CurrValue;
4331 if (parseAbsoluteExpression(CurrValue))
4332 return true;
4333
4334 Values.push_back((uint8_t)CurrValue);
4335
4336 while (getLexer().is(AsmToken::Comma)) {
4337 Lex();
4338
4339 if (parseAbsoluteExpression(CurrValue))
4340 return true;
4341
4342 Values.push_back((uint8_t)CurrValue);
4343 }
4344
4345 getStreamer().emitCFIEscape(Values);
4346 return false;
4347}
4348
4349/// parseDirectiveCFIReturnColumn
4350/// ::= .cfi_return_column register
4351bool AsmParser::parseDirectiveCFIReturnColumn(SMLoc DirectiveLoc) {
4352 int64_t Register = 0;
4353 if (parseRegisterOrRegisterNumber(Register, DirectiveLoc))
4354 return true;
4355 getStreamer().emitCFIReturnColumn(Register);
4356 return false;
4357}
4358
4359/// parseDirectiveCFISignalFrame
4360/// ::= .cfi_signal_frame
4361bool AsmParser::parseDirectiveCFISignalFrame() {
4362 if (parseToken(AsmToken::EndOfStatement,
4363 "unexpected token in '.cfi_signal_frame'"))
4364 return true;
4365
4366 getStreamer().emitCFISignalFrame();
4367 return false;
4368}
4369
4370/// parseDirectiveCFIUndefined
4371/// ::= .cfi_undefined register
4372bool AsmParser::parseDirectiveCFIUndefined(SMLoc DirectiveLoc) {
4373 int64_t Register = 0;
4374
4375 if (parseRegisterOrRegisterNumber(Register, DirectiveLoc))
4376 return true;
4377
4378 getStreamer().emitCFIUndefined(Register);
4379 return false;
4380}
4381
4382/// parseDirectiveAltmacro
4383/// ::= .altmacro
4384/// ::= .noaltmacro
4385bool AsmParser::parseDirectiveAltmacro(StringRef Directive) {
4386 if (getLexer().isNot(AsmToken::EndOfStatement))
4387 return TokError("unexpected token in '" + Directive + "' directive");
4388 AltMacroMode = (Directive == ".altmacro");
4389 return false;
4390}
4391
4392/// parseDirectiveMacrosOnOff
4393/// ::= .macros_on
4394/// ::= .macros_off
4395bool AsmParser::parseDirectiveMacrosOnOff(StringRef Directive) {
4396 if (parseToken(AsmToken::EndOfStatement,
4397 "unexpected token in '" + Directive + "' directive"))
4398 return true;
4399
4400 setMacrosEnabled(Directive == ".macros_on");
4401 return false;
4402}
4403
4404/// parseDirectiveMacro
4405/// ::= .macro name[,] [parameters]
4406bool AsmParser::parseDirectiveMacro(SMLoc DirectiveLoc) {
4407 StringRef Name;
4408 if (parseIdentifier(Name))
4409 return TokError("expected identifier in '.macro' directive");
4410
4411 if (getLexer().is(AsmToken::Comma))
4412 Lex();
4413
4414 MCAsmMacroParameters Parameters;
4415 while (getLexer().isNot(AsmToken::EndOfStatement)) {
4416
4417 if (!Parameters.empty() && Parameters.back().Vararg)
4418 return Error(Lexer.getLoc(), "vararg parameter '" +
4419 Parameters.back().Name +
4420 "' should be the last parameter");
4421
4422 MCAsmMacroParameter Parameter;
4423 if (parseIdentifier(Parameter.Name))
4424 return TokError("expected identifier in '.macro' directive");
4425
4426 // Emit an error if two (or more) named parameters share the same name
4427 for (const MCAsmMacroParameter& CurrParam : Parameters)
4428 if (CurrParam.Name.equals(Parameter.Name))
4429 return TokError("macro '" + Name + "' has multiple parameters"
4430 " named '" + Parameter.Name + "'");
4431
4432 if (Lexer.is(AsmToken::Colon)) {
4433 Lex(); // consume ':'
4434
4435 SMLoc QualLoc;
4436 StringRef Qualifier;
4437
4438 QualLoc = Lexer.getLoc();
4439 if (parseIdentifier(Qualifier))
4440 return Error(QualLoc, "missing parameter qualifier for "
4441 "'" + Parameter.Name + "' in macro '" + Name + "'");
4442
4443 if (Qualifier == "req")
4444 Parameter.Required = true;
4445 else if (Qualifier == "vararg")
4446 Parameter.Vararg = true;
4447 else
4448 return Error(QualLoc, Qualifier + " is not a valid parameter qualifier "
4449 "for '" + Parameter.Name + "' in macro '" + Name + "'");
4450 }
4451
4452 if (getLexer().is(AsmToken::Equal)) {
4453 Lex();
4454
4455 SMLoc ParamLoc;
4456
4457 ParamLoc = Lexer.getLoc();
4458 if (parseMacroArgument(Parameter.Value, /*Vararg=*/false ))
4459 return true;
4460
4461 if (Parameter.Required)
4462 Warning(ParamLoc, "pointless default value for required parameter "
4463 "'" + Parameter.Name + "' in macro '" + Name + "'");
4464 }
4465
4466 Parameters.push_back(std::move(Parameter));
4467
4468 if (getLexer().is(AsmToken::Comma))
4469 Lex();
4470 }
4471
4472 // Eat just the end of statement.
4473 Lexer.Lex();
4474
4475 // Consuming deferred text, so use Lexer.Lex to ignore Lexing Errors
4476 AsmToken EndToken, StartToken = getTok();
4477 unsigned MacroDepth = 0;
4478 // Lex the macro definition.
4479 while (true) {
4480 // Ignore Lexing errors in macros.
4481 while (Lexer.is(AsmToken::Error)) {
4482 Lexer.Lex();
4483 }
4484
4485 // Check whether we have reached the end of the file.
4486 if (getLexer().is(AsmToken::Eof))
4487 return Error(DirectiveLoc, "no matching '.endmacro' in definition");
4488
4489 // Otherwise, check whether we have reach the .endmacro or the start of a
4490 // preprocessor line marker.
4491 if (getLexer().is(AsmToken::Identifier)) {
4492 if (getTok().getIdentifier() == ".endm" ||
4493 getTok().getIdentifier() == ".endmacro") {
4494 if (MacroDepth == 0) { // Outermost macro.
4495 EndToken = getTok();
4496 Lexer.Lex();
4497 if (getLexer().isNot(AsmToken::EndOfStatement))
4498 return TokError("unexpected token in '" + EndToken.getIdentifier() +
4499 "' directive");
4500 break;
4501 } else {
4502 // Otherwise we just found the end of an inner macro.
4503 --MacroDepth;
4504 }
4505 } else if (getTok().getIdentifier() == ".macro") {
4506 // We allow nested macros. Those aren't instantiated until the outermost
4507 // macro is expanded so just ignore them for now.
4508 ++MacroDepth;
4509 }
4510 } else if (Lexer.is(AsmToken::HashDirective)) {
4511 (void)parseCppHashLineFilenameComment(getLexer().getLoc());
4512 }
4513
4514 // Otherwise, scan til the end of the statement.
4515 eatToEndOfStatement();
4516 }
4517
4518 if (getContext().lookupMacro(Name)) {
4519 return Error(DirectiveLoc, "macro '" + Name + "' is already defined");
4520 }
4521
4522 const char *BodyStart = StartToken.getLoc().getPointer();
4523 const char *BodyEnd = EndToken.getLoc().getPointer();
4524 StringRef Body = StringRef(BodyStart, BodyEnd - BodyStart);
4525 checkForBadMacro(DirectiveLoc, Name, Body, Parameters);
4526 MCAsmMacro Macro(Name, Body, std::move(Parameters));
4527 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)
4528 Macro.dump())do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("asm-macros")) { dbgs() << "Defining new macro:\n"; Macro
.dump(); } } while (false)
;
4529 getContext().defineMacro(Name, std::move(Macro));
4530 return false;
4531}
4532
4533/// checkForBadMacro
4534///
4535/// With the support added for named parameters there may be code out there that
4536/// is transitioning from positional parameters. In versions of gas that did
4537/// not support named parameters they would be ignored on the macro definition.
4538/// But to support both styles of parameters this is not possible so if a macro
4539/// definition has named parameters but does not use them and has what appears
4540/// to be positional parameters, strings like $1, $2, ... and $n, then issue a
4541/// warning that the positional parameter found in body which have no effect.
4542/// Hoping the developer will either remove the named parameters from the macro
4543/// definition so the positional parameters get used if that was what was
4544/// intended or change the macro to use the named parameters. It is possible
4545/// this warning will trigger when the none of the named parameters are used
4546/// and the strings like $1 are infact to simply to be passed trough unchanged.
4547void AsmParser::checkForBadMacro(SMLoc DirectiveLoc, StringRef Name,
4548 StringRef Body,
4549 ArrayRef<MCAsmMacroParameter> Parameters) {
4550 // If this macro is not defined with named parameters the warning we are
4551 // checking for here doesn't apply.
4552 unsigned NParameters = Parameters.size();
4553 if (NParameters == 0)
4554 return;
4555
4556 bool NamedParametersFound = false;
4557 bool PositionalParametersFound = false;
4558
4559 // Look at the body of the macro for use of both the named parameters and what
4560 // are likely to be positional parameters. This is what expandMacro() is
4561 // doing when it finds the parameters in the body.
4562 while (!Body.empty()) {
4563 // Scan for the next possible parameter.
4564 std::size_t End = Body.size(), Pos = 0;
4565 for (; Pos != End; ++Pos) {
4566 // Check for a substitution or escape.
4567 // This macro is defined with parameters, look for \foo, \bar, etc.
4568 if (Body[Pos] == '\\' && Pos + 1 != End)
4569 break;
4570
4571 // This macro should have parameters, but look for $0, $1, ..., $n too.
4572 if (Body[Pos] != '$' || Pos + 1 == End)
4573 continue;
4574 char Next = Body[Pos + 1];
4575 if (Next == '$' || Next == 'n' ||
4576 isdigit(static_cast<unsigned char>(Next)))
4577 break;
4578 }
4579
4580 // Check if we reached the end.
4581 if (Pos == End)
4582 break;
4583
4584 if (Body[Pos] == '$') {
4585 switch (Body[Pos + 1]) {
4586 // $$ => $
4587 case '$':
4588 break;
4589
4590 // $n => number of arguments
4591 case 'n':
4592 PositionalParametersFound = true;
4593 break;
4594
4595 // $[0-9] => argument
4596 default: {
4597 PositionalParametersFound = true;
4598 break;
4599 }
4600 }
4601 Pos += 2;
4602 } else {
4603 unsigned I = Pos + 1;
4604 while (isIdentifierChar(Body[I]) && I + 1 != End)
4605 ++I;
4606
4607 const char *Begin = Body.data() + Pos + 1;
4608 StringRef Argument(Begin, I - (Pos + 1));
4609 unsigned Index = 0;
4610 for (; Index < NParameters; ++Index)
4611 if (Parameters[Index].Name == Argument)
4612 break;
4613
4614 if (Index == NParameters) {
4615 if (Body[Pos + 1] == '(' && Body[Pos + 2] == ')')
4616 Pos += 3;
4617 else {
4618 Pos = I;
4619 }
4620 } else {
4621 NamedParametersFound = true;
4622 Pos += 1 + Argument.size();
4623 }
4624 }
4625 // Update the scan point.
4626 Body = Body.substr(Pos);
4627 }
4628
4629 if (!NamedParametersFound && PositionalParametersFound)
4630 Warning(DirectiveLoc, "macro defined with named parameters which are not "
4631 "used in macro body, possible positional parameter "
4632 "found in body which will have no effect");
4633}
4634
4635/// parseDirectiveExitMacro
4636/// ::= .exitm
4637bool AsmParser::parseDirectiveExitMacro(StringRef Directive) {
4638 if (parseToken(AsmToken::EndOfStatement,
4639 "unexpected token in '" + Directive + "' directive"))
4640 return true;
4641
4642 if (!isInsideMacroInstantiation())
4643 return TokError("unexpected '" + Directive + "' in file, "
4644 "no current macro definition");
4645
4646 // Exit all conditionals that are active in the current macro.
4647 while (TheCondStack.size() != ActiveMacros.back()->CondStackDepth) {
4648 TheCondState = TheCondStack.back();
4649 TheCondStack.pop_back();
4650 }
4651
4652 handleMacroExit();
4653 return false;
4654}
4655
4656/// parseDirectiveEndMacro
4657/// ::= .endm
4658/// ::= .endmacro
4659bool AsmParser::parseDirectiveEndMacro(StringRef Directive) {
4660 if (getLexer().isNot(AsmToken::EndOfStatement))
4661 return TokError("unexpected token in '" + Directive + "' directive");
4662
4663 // If we are inside a macro instantiation, terminate the current
4664 // instantiation.
4665 if (isInsideMacroInstantiation()) {
4666 handleMacroExit();
4667 return false;
4668 }
4669
4670 // Otherwise, this .endmacro is a stray entry in the file; well formed
4671 // .endmacro directives are handled during the macro definition parsing.
4672 return TokError("unexpected '" + Directive + "' in file, "
4673 "no current macro definition");
4674}
4675
4676/// parseDirectivePurgeMacro
4677/// ::= .purgem
4678bool AsmParser::parseDirectivePurgeMacro(SMLoc DirectiveLoc) {
4679 StringRef Name;
4680 SMLoc Loc;
4681 if (parseTokenLoc(Loc) ||
4682 check(parseIdentifier(Name), Loc,
4683 "expected identifier in '.purgem' directive") ||
4684 parseToken(AsmToken::EndOfStatement,
4685 "unexpected token in '.purgem' directive"))
4686 return true;
4687
4688 if (!getContext().lookupMacro(Name))
4689 return Error(DirectiveLoc, "macro '" + Name + "' is not defined");
4690
4691 getContext().undefineMacro(Name);
4692 DEBUG_WITH_TYPE("asm-macros", dbgs()do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("asm-macros")) { dbgs() << "Un-defining macro: " <<
Name << "\n"; } } while (false)
4693 << "Un-defining macro: " << Name << "\n")do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("asm-macros")) { dbgs() << "Un-defining macro: " <<
Name << "\n"; } } while (false)
;
4694 return false;
4695}
4696
4697/// parseDirectiveBundleAlignMode
4698/// ::= {.bundle_align_mode} expression
4699bool AsmParser::parseDirectiveBundleAlignMode() {
4700 // Expect a single argument: an expression that evaluates to a constant
4701 // in the inclusive range 0-30.
4702 SMLoc ExprLoc = getLexer().getLoc();
4703 int64_t AlignSizePow2;
4704 if (checkForValidSection() || parseAbsoluteExpression(AlignSizePow2) ||
4705 parseToken(AsmToken::EndOfStatement, "unexpected token after expression "
4706 "in '.bundle_align_mode' "
4707 "directive") ||
4708 check(AlignSizePow2 < 0 || AlignSizePow2 > 30, ExprLoc,
4709 "invalid bundle alignment size (expected between 0 and 30)"))
4710 return true;
4711
4712 // Because of AlignSizePow2's verified range we can safely truncate it to
4713 // unsigned.
4714 getStreamer().emitBundleAlignMode(static_cast<unsigned>(AlignSizePow2));
4715 return false;
4716}
4717
4718/// parseDirectiveBundleLock
4719/// ::= {.bundle_lock} [align_to_end]
4720bool AsmParser::parseDirectiveBundleLock() {
4721 if (checkForValidSection())
4722 return true;
4723 bool AlignToEnd = false;
4724
4725 StringRef Option;
4726 SMLoc Loc = getTok().getLoc();
4727 const char *kInvalidOptionError =
4728 "invalid option for '.bundle_lock' directive";
4729
4730 if (!parseOptionalToken(AsmToken::EndOfStatement)) {
4731 if (check(parseIdentifier(Option), Loc, kInvalidOptionError) ||
4732 check(Option != "align_to_end", Loc, kInvalidOptionError) ||
4733 parseToken(AsmToken::EndOfStatement,
4734 "unexpected token after '.bundle_lock' directive option"))
4735 return true;
4736 AlignToEnd = true;
4737 }
4738
4739 getStreamer().emitBundleLock(AlignToEnd);
4740 return false;
4741}
4742
4743/// parseDirectiveBundleLock
4744/// ::= {.bundle_lock}
4745bool AsmParser::parseDirectiveBundleUnlock() {
4746 if (checkForValidSection() ||
4747 parseToken(AsmToken::EndOfStatement,
4748 "unexpected token in '.bundle_unlock' directive"))
4749 return true;
4750
4751 getStreamer().emitBundleUnlock();
4752 return false;
4753}
4754
4755/// parseDirectiveSpace
4756/// ::= (.skip | .space) expression [ , expression ]
4757bool AsmParser::parseDirectiveSpace(StringRef IDVal) {
4758 SMLoc NumBytesLoc = Lexer.getLoc();
4759 const MCExpr *NumBytes;
4760 if (checkForValidSection() || parseExpression(NumBytes))
4761 return true;
4762
4763 int64_t FillExpr = 0;
4764 if (parseOptionalToken(AsmToken::Comma))
4765 if (parseAbsoluteExpression(FillExpr))
4766 return addErrorSuffix("in '" + Twine(IDVal) + "' directive");
4767 if (parseToken(AsmToken::EndOfStatement))
4768 return addErrorSuffix("in '" + Twine(IDVal) + "' directive");
4769
4770 // FIXME: Sometimes the fill expr is 'nop' if it isn't supplied, instead of 0.
4771 getStreamer().emitFill(*NumBytes, FillExpr, NumBytesLoc);
4772
4773 return false;
4774}
4775
4776/// parseDirectiveDCB
4777/// ::= .dcb.{b, l, w} expression, expression
4778bool AsmParser::parseDirectiveDCB(StringRef IDVal, unsigned Size) {
4779 SMLoc NumValuesLoc = Lexer.getLoc();
4780 int64_t NumValues;
4781 if (checkForValidSection() || parseAbsoluteExpression(NumValues))
4782 return true;
4783
4784 if (NumValues < 0) {
4785 Warning(NumValuesLoc, "'" + Twine(IDVal) + "' directive with negative repeat count has no effect");
4786 return false;
4787 }
4788
4789 if (parseToken(AsmToken::Comma,
4790 "unexpected token in '" + Twine(IDVal) + "' directive"))
4791 return true;
4792
4793 const MCExpr *Value;
4794 SMLoc ExprLoc = getLexer().getLoc();
4795 if (parseExpression(Value))
4796 return true;
4797
4798 // Special case constant expressions to match code generator.
4799 if (const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Value)) {
4800 assert(Size <= 8 && "Invalid size")((Size <= 8 && "Invalid size") ? static_cast<void
> (0) : __assert_fail ("Size <= 8 && \"Invalid size\""
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/lib/MC/MCParser/AsmParser.cpp"
, 4800, __PRETTY_FUNCTION__))
;
4801 uint64_t IntValue = MCE->getValue();
4802 if (!isUIntN(8 * Size, IntValue) && !isIntN(8 * Size, IntValue))
4803 return Error(ExprLoc, "literal value out of range for directive");
4804 for (uint64_t i = 0, e = NumValues; i != e; ++i)
4805 getStreamer().emitIntValue(IntValue, Size);
4806 } else {
4807 for (uint64_t i = 0, e = NumValues; i != e; ++i)
4808 getStreamer().emitValue(Value, Size, ExprLoc);
4809 }
4810
4811 if (parseToken(AsmToken::EndOfStatement,
4812 "unexpected token in '" + Twine(IDVal) + "' directive"))
4813 return true;
4814
4815 return false;
4816}
4817
4818/// parseDirectiveRealDCB
4819/// ::= .dcb.{d, s} expression, expression
4820bool AsmParser::parseDirectiveRealDCB(StringRef IDVal, const fltSemantics &Semantics) {
4821 SMLoc NumValuesLoc = Lexer.getLoc();
4822 int64_t NumValues;
4823 if (checkForValidSection() || parseAbsoluteExpression(NumValues))
4824 return true;
4825
4826 if (NumValues < 0) {
4827 Warning(NumValuesLoc, "'" + Twine(IDVal) + "' directive with negative repeat count has no effect");
4828 return false;
4829 }
4830
4831 if (parseToken(AsmToken::Comma,
4832 "unexpected token in '" + Twine(IDVal) + "' directive"))
4833 return true;
4834
4835 APInt AsInt;
4836 if (parseRealValue(Semantics, AsInt))
4837 return true;
4838
4839 if (parseToken(AsmToken::EndOfStatement,
4840 "unexpected token in '" + Twine(IDVal) + "' directive"))
4841 return true;
4842
4843 for (uint64_t i = 0, e = NumValues; i != e; ++i)
4844 getStreamer().emitIntValue(AsInt.getLimitedValue(),
4845 AsInt.getBitWidth() / 8);
4846
4847 return false;
4848}
4849
4850/// parseDirectiveDS
4851/// ::= .ds.{b, d, l, p, s, w, x} expression
4852bool AsmParser::parseDirectiveDS(StringRef IDVal, unsigned Size) {
4853 SMLoc NumValuesLoc = Lexer.getLoc();
4854 int64_t NumValues;
4855 if (checkForValidSection() || parseAbsoluteExpression(NumValues))
4856 return true;
4857
4858 if (NumValues < 0) {
4859 Warning(NumValuesLoc, "'" + Twine(IDVal) + "' directive with negative repeat count has no effect");
4860 return false;
4861 }
4862
4863 if (parseToken(AsmToken::EndOfStatement,
4864 "unexpected token in '" + Twine(IDVal) + "' directive"))
4865 return true;
4866
4867 for (uint64_t i = 0, e = NumValues; i != e; ++i)
4868 getStreamer().emitFill(Size, 0);
4869
4870 return false;
4871}
4872
4873/// parseDirectiveLEB128
4874/// ::= (.sleb128 | .uleb128) [ expression (, expression)* ]
4875bool AsmParser::parseDirectiveLEB128(bool Signed) {
4876 if (checkForValidSection())
4877 return true;
4878
4879 auto parseOp = [&]() -> bool {
4880 const MCExpr *Value;
4881 if (parseExpression(Value))
4882 return true;
4883 if (Signed)
4884 getStreamer().emitSLEB128Value(Value);
4885 else
4886 getStreamer().emitULEB128Value(Value);
4887 return false;
4888 };
4889
4890 if (parseMany(parseOp))
4891 return addErrorSuffix(" in directive");
4892
4893 return false;
4894}
4895
4896/// parseDirectiveSymbolAttribute
4897/// ::= { ".globl", ".weak", ... } [ identifier ( , identifier )* ]
4898bool AsmParser::parseDirectiveSymbolAttribute(MCSymbolAttr Attr) {
4899 auto parseOp = [&]() -> bool {
4900 StringRef Name;
4901 SMLoc Loc = getTok().getLoc();
4902 if (parseIdentifier(Name))
4903 return Error(Loc, "expected identifier");
4904 MCSymbol *Sym = getContext().getOrCreateSymbol(Name);
4905
4906 // Assembler local symbols don't make any sense here. Complain loudly.
4907 if (Sym->isTemporary())
4908 return Error(Loc, "non-local symbol required");
4909
4910 if (!getStreamer().emitSymbolAttribute(Sym, Attr))
4911 return Error(Loc, "unable to emit symbol attribute");
4912 return false;
4913 };
4914
4915 if (parseMany(parseOp))
4916 return addErrorSuffix(" in directive");
4917 return false;
4918}
4919
4920/// parseDirectiveComm
4921/// ::= ( .comm | .lcomm ) identifier , size_expression [ , align_expression ]
4922bool AsmParser::parseDirectiveComm(bool IsLocal) {
4923 if (checkForValidSection())
4924 return true;
4925
4926 SMLoc IDLoc = getLexer().getLoc();
4927 StringRef Name;
4928 if (parseIdentifier(Name))
4929 return TokError("expected identifier in directive");
4930
4931 // Handle the identifier as the key symbol.
4932 MCSymbol *Sym = getContext().getOrCreateSymbol(Name);
4933
4934 if (getLexer().isNot(AsmToken::Comma))
4935 return TokError("unexpected token in directive");
4936 Lex();
4937
4938 int64_t Size;
4939 SMLoc SizeLoc = getLexer().getLoc();
4940 if (parseAbsoluteExpression(Size))
4941 return true;
4942
4943 int64_t Pow2Alignment = 0;
4944 SMLoc Pow2AlignmentLoc;
4945 if (getLexer().is(AsmToken::Comma)) {
4946 Lex();
4947 Pow2AlignmentLoc = getLexer().getLoc();
4948 if (parseAbsoluteExpression(Pow2Alignment))
4949 return true;
4950
4951 LCOMM::LCOMMType LCOMM = Lexer.getMAI().getLCOMMDirectiveAlignmentType();
4952 if (IsLocal && LCOMM == LCOMM::NoAlignment)
4953 return Error(Pow2AlignmentLoc, "alignment not supported on this target");
4954
4955 // If this target takes alignments in bytes (not log) validate and convert.
4956 if ((!IsLocal && Lexer.getMAI().getCOMMDirectiveAlignmentIsInBytes()) ||
4957 (IsLocal && LCOMM == LCOMM::ByteAlignment)) {
4958 if (!isPowerOf2_64(Pow2Alignment))
4959 return Error(Pow2AlignmentLoc, "alignment must be a power of 2");
4960 Pow2Alignment = Log2_64(Pow2Alignment);
4961 }
4962 }
4963
4964 if (parseToken(AsmToken::EndOfStatement,
4965 "unexpected token in '.comm' or '.lcomm' directive"))
4966 return true;
4967
4968 // NOTE: a size of zero for a .comm should create a undefined symbol
4969 // but a size of .lcomm creates a bss symbol of size zero.
4970 if (Size < 0)
4971 return Error(SizeLoc, "invalid '.comm' or '.lcomm' directive size, can't "
4972 "be less than zero");
4973
4974 // NOTE: The alignment in the directive is a power of 2 value, the assembler
4975 // may internally end up wanting an alignment in bytes.
4976 // FIXME: Diagnose overflow.
4977 if (Pow2Alignment < 0)
4978 return Error(Pow2AlignmentLoc, "invalid '.comm' or '.lcomm' directive "
4979 "alignment, can't be less than zero");
4980
4981 Sym->redefineIfPossible();
4982 if (!Sym->isUndefined())
4983 return Error(IDLoc, "invalid symbol redefinition");
4984
4985 // Create the Symbol as a common or local common with Size and Pow2Alignment
4986 if (IsLocal) {
4987 getStreamer().emitLocalCommonSymbol(Sym, Size, 1 << Pow2Alignment);
4988 return false;
4989 }
4990
4991 getStreamer().emitCommonSymbol(Sym, Size, 1 << Pow2Alignment);
4992 return false;
4993}
4994
4995/// parseDirectiveAbort
4996/// ::= .abort [... message ...]
4997bool AsmParser::parseDirectiveAbort() {
4998 // FIXME: Use loc from directive.
4999 SMLoc Loc = getLexer().getLoc();
5000
5001 StringRef Str = parseStringToEndOfStatement();
5002 if (parseToken(AsmToken::EndOfStatement,
5003 "unexpected token in '.abort' directive"))
5004 return true;
5005
5006 if (Str.empty())
5007 return Error(Loc, ".abort detected. Assembly stopping.");
5008 else
5009 return Error(Loc, ".abort '" + Str + "' detected. Assembly stopping.");
5010 // FIXME: Actually abort assembly here.
5011
5012 return false;
5013}
5014
5015/// parseDirectiveInclude
5016/// ::= .include "filename"
5017bool AsmParser::parseDirectiveInclude() {
5018 // Allow the strings to have escaped octal character sequence.
5019 std::string Filename;
5020 SMLoc IncludeLoc = getTok().getLoc();
5021
5022 if (check(getTok().isNot(AsmToken::String),
5023 "expected string in '.include' directive") ||
5024 parseEscapedString(Filename) ||
5025 check(getTok().isNot(AsmToken::EndOfStatement),
5026 "unexpected token in '.include' directive") ||
5027 // Attempt to switch the lexer to the included file before consuming the
5028 // end of statement to avoid losing it when we switch.
5029 check(enterIncludeFile(Filename), IncludeLoc,
5030 "Could not find include file '" + Filename + "'"))
5031 return true;
5032
5033 return false;
5034}
5035
5036/// parseDirectiveIncbin
5037/// ::= .incbin "filename" [ , skip [ , count ] ]
5038bool AsmParser::parseDirectiveIncbin() {
5039 // Allow the strings to have escaped octal character sequence.
5040 std::string Filename;
5041 SMLoc IncbinLoc = getTok().getLoc();
5042 if (check(getTok().isNot(AsmToken::String),
5043 "expected string in '.incbin' directive") ||
5044 parseEscapedString(Filename))
5045 return true;
5046
5047 int64_t Skip = 0;
5048 const MCExpr *Count = nullptr;
5049 SMLoc SkipLoc, CountLoc;
5050 if (parseOptionalToken(AsmToken::Comma)) {
5051 // The skip expression can be omitted while specifying the count, e.g:
5052 // .incbin "filename",,4
5053 if (getTok().isNot(AsmToken::Comma)) {
5054 if (parseTokenLoc(SkipLoc) || parseAbsoluteExpression(Skip))
5055 return true;
5056 }
5057 if (parseOptionalToken(AsmToken::Comma)) {
5058 CountLoc = getTok().getLoc();
5059 if (parseExpression(Count))
5060 return true;
5061 }
5062 }
5063
5064 if (parseToken(AsmToken::EndOfStatement,
5065 "unexpected token in '.incbin' directive"))
5066 return true;
5067
5068 if (check(Skip < 0, SkipLoc, "skip is negative"))
5069 return true;
5070
5071 // Attempt to process the included file.
5072 if (processIncbinFile(Filename, Skip, Count, CountLoc))
5073 return Error(IncbinLoc, "Could not find incbin file '" + Filename + "'");
5074 return false;
5075}
5076
5077/// parseDirectiveIf
5078/// ::= .if{,eq,ge,gt,le,lt,ne} expression
5079bool AsmParser::parseDirectiveIf(SMLoc DirectiveLoc, DirectiveKind DirKind) {
5080 TheCondStack.push_back(TheCondState);
5081 TheCondState.TheCond = AsmCond::IfCond;
5082 if (TheCondState.Ignore) {
5083 eatToEndOfStatement();
5084 } else {
5085 int64_t ExprValue;
5086 if (parseAbsoluteExpression(ExprValue) ||
5087 parseToken(AsmToken::EndOfStatement,
5088 "unexpected token in '.if' directive"))
5089 return true;
5090
5091 switch (DirKind) {
5092 default:
5093 llvm_unreachable("unsupported directive")::llvm::llvm_unreachable_internal("unsupported directive", "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/lib/MC/MCParser/AsmParser.cpp"
, 5093)
;
5094 case DK_IF:
5095 case DK_IFNE:
5096 break;
5097 case DK_IFEQ:
5098 ExprValue = ExprValue == 0;
5099 break;
5100 case DK_IFGE:
5101 ExprValue = ExprValue >= 0;
5102 break;
5103 case DK_IFGT:
5104 ExprValue = ExprValue > 0;
5105 break;
5106 case DK_IFLE:
5107 ExprValue = ExprValue <= 0;
5108 break;
5109 case DK_IFLT:
5110 ExprValue = ExprValue < 0;
5111 break;
5112 }
5113
5114 TheCondState.CondMet = ExprValue;
5115 TheCondState.Ignore = !TheCondState.CondMet;
5116 }
5117
5118 return false;
5119}
5120
5121/// parseDirectiveIfb
5122/// ::= .ifb string
5123bool AsmParser::parseDirectiveIfb(SMLoc DirectiveLoc, bool ExpectBlank) {
5124 TheCondStack.push_back(TheCondState);
5125 TheCondState.TheCond = AsmCond::IfCond;
5126
5127 if (TheCondState.Ignore) {
5128 eatToEndOfStatement();
5129 } else {
5130 StringRef Str = parseStringToEndOfStatement();
5131
5132 if (parseToken(AsmToken::EndOfStatement,
5133 "unexpected token in '.ifb' directive"))
5134 return true;
5135
5136 TheCondState.CondMet = ExpectBlank == Str.empty();
5137 TheCondState.Ignore = !TheCondState.CondMet;
5138 }
5139
5140 return false;
5141}
5142
5143/// parseDirectiveIfc
5144/// ::= .ifc string1, string2
5145/// ::= .ifnc string1, string2
5146bool AsmParser::parseDirectiveIfc(SMLoc DirectiveLoc, bool ExpectEqual) {
5147 TheCondStack.push_back(TheCondState);
5148 TheCondState.TheCond = AsmCond::IfCond;
5149
5150 if (TheCondState.Ignore) {
5151 eatToEndOfStatement();
5152 } else {
5153 StringRef Str1 = parseStringToComma();
5154
5155 if (parseToken(AsmToken::Comma, "unexpected token in '.ifc' directive"))
5156 return true;
5157
5158 StringRef Str2 = parseStringToEndOfStatement();
5159
5160 if (parseToken(AsmToken::EndOfStatement,
5161 "unexpected token in '.ifc' directive"))
5162 return true;
5163
5164 TheCondState.CondMet = ExpectEqual == (Str1.trim() == Str2.trim());
5165 TheCondState.Ignore = !TheCondState.CondMet;
5166 }
5167
5168 return false;
5169}
5170
5171/// parseDirectiveIfeqs
5172/// ::= .ifeqs string1, string2
5173bool AsmParser::parseDirectiveIfeqs(SMLoc DirectiveLoc, bool ExpectEqual) {
5174 if (Lexer.isNot(AsmToken::String)) {
5175 if (ExpectEqual)
5176 return TokError("expected string parameter for '.ifeqs' directive");
5177 return TokError("expected string parameter for '.ifnes' directive");
5178 }
5179
5180 StringRef String1 = getTok().getStringContents();
5181 Lex();
5182
5183 if (Lexer.isNot(AsmToken::Comma)) {
5184 if (ExpectEqual)
5185 return TokError(
5186 "expected comma after first string for '.ifeqs' directive");
5187 return TokError("expected comma after first string for '.ifnes' directive");
5188 }
5189
5190 Lex();
5191
5192 if (Lexer.isNot(AsmToken::String)) {
5193 if (ExpectEqual)
5194 return TokError("expected string parameter for '.ifeqs' directive");
5195 return TokError("expected string parameter for '.ifnes' directive");
5196 }
5197
5198 StringRef String2 = getTok().getStringContents();
5199 Lex();
5200
5201 TheCondStack.push_back(TheCondState);
5202 TheCondState.TheCond = AsmCond::IfCond;
5203 TheCondState.CondMet = ExpectEqual == (String1 == String2);
5204 TheCondState.Ignore = !TheCondState.CondMet;
5205
5206 return false;
5207}
5208
5209/// parseDirectiveIfdef
5210/// ::= .ifdef symbol
5211bool AsmParser::parseDirectiveIfdef(SMLoc DirectiveLoc, bool expect_defined) {
5212 StringRef Name;
5213 TheCondStack.push_back(TheCondState);
5214 TheCondState.TheCond = AsmCond::IfCond;
5215
5216 if (TheCondState.Ignore) {
5217 eatToEndOfStatement();
5218 } else {
5219 if (check(parseIdentifier(Name), "expected identifier after '.ifdef'") ||
5220 parseToken(AsmToken::EndOfStatement, "unexpected token in '.ifdef'"))
5221 return true;
5222
5223 MCSymbol *Sym = getContext().lookupSymbol(Name);
5224
5225 if (expect_defined)
5226 TheCondState.CondMet = (Sym && !Sym->isUndefined(false));
5227 else
5228 TheCondState.CondMet = (!Sym || Sym->isUndefined(false));
5229 TheCondState.Ignore = !TheCondState.CondMet;
5230 }
5231
5232 return false;
5233}
5234
5235/// parseDirectiveElseIf
5236/// ::= .elseif expression
5237bool AsmParser::parseDirectiveElseIf(SMLoc DirectiveLoc) {
5238 if (TheCondState.TheCond != AsmCond::IfCond &&
5239 TheCondState.TheCond != AsmCond::ElseIfCond)
5240 return Error(DirectiveLoc, "Encountered a .elseif that doesn't follow an"
5241 " .if or an .elseif");
5242 TheCondState.TheCond = AsmCond::ElseIfCond;
5243
5244 bool LastIgnoreState = false;
5245 if (!TheCondStack.empty())
5246 LastIgnoreState = TheCondStack.back().Ignore;
5247 if (LastIgnoreState || TheCondState.CondMet) {
5248 TheCondState.Ignore = true;
5249 eatToEndOfStatement();
5250 } else {
5251 int64_t ExprValue;
5252 if (parseAbsoluteExpression(ExprValue))
5253 return true;
5254
5255 if (parseToken(AsmToken::EndOfStatement,
5256 "unexpected token in '.elseif' directive"))
5257 return true;
5258
5259 TheCondState.CondMet = ExprValue;
5260 TheCondState.Ignore = !TheCondState.CondMet;
5261 }
5262
5263 return false;
5264}
5265
5266/// parseDirectiveElse
5267/// ::= .else
5268bool AsmParser::parseDirectiveElse(SMLoc DirectiveLoc) {
5269 if (parseToken(AsmToken::EndOfStatement,
5270 "unexpected token in '.else' directive"))
5271 return true;
5272
5273 if (TheCondState.TheCond != AsmCond::IfCond &&
5274 TheCondState.TheCond != AsmCond::ElseIfCond)
5275 return Error(DirectiveLoc, "Encountered a .else that doesn't follow "
5276 " an .if or an .elseif");
5277 TheCondState.TheCond = AsmCond::ElseCond;
5278 bool LastIgnoreState = false;
5279 if (!TheCondStack.empty())
5280 LastIgnoreState = TheCondStack.back().Ignore;
5281 if (LastIgnoreState || TheCondState.CondMet)
5282 TheCondState.Ignore = true;
5283 else
5284 TheCondState.Ignore = false;
5285
5286 return false;
5287}
5288
5289/// parseDirectiveEnd
5290/// ::= .end
5291bool AsmParser::parseDirectiveEnd(SMLoc DirectiveLoc) {
5292 if (parseToken(AsmToken::EndOfStatement,
5293 "unexpected token in '.end' directive"))
5294 return true;
5295
5296 while (Lexer.isNot(AsmToken::Eof))
5297 Lexer.Lex();
5298
5299 return false;
5300}
5301
5302/// parseDirectiveError
5303/// ::= .err
5304/// ::= .error [string]
5305bool AsmParser::parseDirectiveError(SMLoc L, bool WithMessage) {
5306 if (!TheCondStack.empty()) {
5307 if (TheCondStack.back().Ignore) {
5308 eatToEndOfStatement();
5309 return false;
5310 }
5311 }
5312
5313 if (!WithMessage)
5314 return Error(L, ".err encountered");
5315
5316 StringRef Message = ".error directive invoked in source file";
5317 if (Lexer.isNot(AsmToken::EndOfStatement)) {
5318 if (Lexer.isNot(AsmToken::String))
5319 return TokError(".error argument must be a string");
5320
5321 Message = getTok().getStringContents();
5322 Lex();
5323 }
5324
5325 return Error(L, Message);
5326}
5327
5328/// parseDirectiveWarning
5329/// ::= .warning [string]
5330bool AsmParser::parseDirectiveWarning(SMLoc L) {
5331 if (!TheCondStack.empty()) {
5332 if (TheCondStack.back().Ignore) {
5333 eatToEndOfStatement();
5334 return false;
5335 }
5336 }
5337
5338 StringRef Message = ".warning directive invoked in source file";
5339
5340 if (!parseOptionalToken(AsmToken::EndOfStatement)) {
5341 if (Lexer.isNot(AsmToken::String))
5342 return TokError(".warning argument must be a string");
5343
5344 Message = getTok().getStringContents();
5345 Lex();
5346 if (parseToken(AsmToken::EndOfStatement,
5347 "expected end of statement in '.warning' directive"))
5348 return true;
5349 }
5350
5351 return Warning(L, Message);
5352}
5353
5354/// parseDirectiveEndIf
5355/// ::= .endif
5356bool AsmParser::parseDirectiveEndIf(SMLoc DirectiveLoc) {
5357 if (parseToken(AsmToken::EndOfStatement,
5358 "unexpected token in '.endif' directive"))
5359 return true;
5360
5361 if ((TheCondState.TheCond == AsmCond::NoCond) || TheCondStack.empty())
5362 return Error(DirectiveLoc, "Encountered a .endif that doesn't follow "
5363 "an .if or .else");
5364 if (!TheCondStack.empty()) {
5365 TheCondState = TheCondStack.back();
5366 TheCondStack.pop_back();
5367 }
5368
5369 return false;
5370}
5371
5372void AsmParser::initializeDirectiveKindMap() {
5373 /* Lookup will be done with the directive
5374 * converted to lower case, so all these
5375 * keys should be lower case.
5376 * (target specific directives are handled
5377 * elsewhere)
5378 */
5379 DirectiveKindMap[".set"] = DK_SET;
5380 DirectiveKindMap[".equ"] = DK_EQU;
5381 DirectiveKindMap[".equiv"] = DK_EQUIV;
5382 DirectiveKindMap[".ascii"] = DK_ASCII;
5383 DirectiveKindMap[".asciz"] = DK_ASCIZ;
5384 DirectiveKindMap[".string"] = DK_STRING;
5385 DirectiveKindMap[".byte"] = DK_BYTE;
5386 DirectiveKindMap[".short"] = DK_SHORT;
5387 DirectiveKindMap[".value"] = DK_VALUE;
5388 DirectiveKindMap[".2byte"] = DK_2BYTE;
5389 DirectiveKindMap[".long"] = DK_LONG;
5390 DirectiveKindMap[".int"] = DK_INT;
5391 DirectiveKindMap[".4byte"] = DK_4BYTE;
5392 DirectiveKindMap[".quad"] = DK_QUAD;
5393 DirectiveKindMap[".8byte"] = DK_8BYTE;
5394 DirectiveKindMap[".octa"] = DK_OCTA;
5395 DirectiveKindMap[".single"] = DK_SINGLE;
5396 DirectiveKindMap[".float"] = DK_FLOAT;
5397 DirectiveKindMap[".double"] = DK_DOUBLE;
5398 DirectiveKindMap[".align"] = DK_ALIGN;
5399 DirectiveKindMap[".align32"] = DK_ALIGN32;
5400 DirectiveKindMap[".balign"] = DK_BALIGN;
5401 DirectiveKindMap[".balignw"] = DK_BALIGNW;
5402 DirectiveKindMap[".balignl"] = DK_BALIGNL;
5403 DirectiveKindMap[".p2align"] = DK_P2ALIGN;
5404 DirectiveKindMap[".p2alignw"] = DK_P2ALIGNW;
5405 DirectiveKindMap[".p2alignl"] = DK_P2ALIGNL;
5406 DirectiveKindMap[".org"] = DK_ORG;
5407 DirectiveKindMap[".fill"] = DK_FILL;
5408 DirectiveKindMap[".zero"] = DK_ZERO;
5409 DirectiveKindMap[".extern"] = DK_EXTERN;
5410 DirectiveKindMap[".globl"] = DK_GLOBL;
5411 DirectiveKindMap[".global"] = DK_GLOBAL;
5412 DirectiveKindMap[".lazy_reference"] = DK_LAZY_REFERENCE;
5413 DirectiveKindMap[".no_dead_strip"] = DK_NO_DEAD_STRIP;
5414 DirectiveKindMap[".symbol_resolver"] = DK_SYMBOL_RESOLVER;
5415 DirectiveKindMap[".private_extern"] = DK_PRIVATE_EXTERN;
5416 DirectiveKindMap[".reference"] = DK_REFERENCE;
5417 DirectiveKindMap[".weak_definition"] = DK_WEAK_DEFINITION;
5418 DirectiveKindMap[".weak_reference"] = DK_WEAK_REFERENCE;
5419 DirectiveKindMap[".weak_def_can_be_hidden"] = DK_WEAK_DEF_CAN_BE_HIDDEN;
5420 DirectiveKindMap[".cold"] = DK_COLD;
5421 DirectiveKindMap[".comm"] = DK_COMM;
5422 DirectiveKindMap[".common"] = DK_COMMON;
5423 DirectiveKindMap[".lcomm"] = DK_LCOMM;
5424 DirectiveKindMap[".abort"] = DK_ABORT;
5425 DirectiveKindMap[".include"] = DK_INCLUDE;
5426 DirectiveKindMap[".incbin"] = DK_INCBIN;
5427 DirectiveKindMap[".code16"] = DK_CODE16;
5428 DirectiveKindMap[".code16gcc"] = DK_CODE16GCC;
5429 DirectiveKindMap[".rept"] = DK_REPT;
5430 DirectiveKindMap[".rep"] = DK_REPT;
5431 DirectiveKindMap[".irp"] = DK_IRP;
5432 DirectiveKindMap[".irpc"] = DK_IRPC;
5433 DirectiveKindMap[".endr"] = DK_ENDR;
5434 DirectiveKindMap[".bundle_align_mode"] = DK_BUNDLE_ALIGN_MODE;
5435 DirectiveKindMap[".bundle_lock"] = DK_BUNDLE_LOCK;
5436 DirectiveKindMap[".bundle_unlock"] = DK_BUNDLE_UNLOCK;
5437 DirectiveKindMap[".if"] = DK_IF;
5438 DirectiveKindMap[".ifeq"] = DK_IFEQ;
5439 DirectiveKindMap[".ifge"] = DK_IFGE;
5440 DirectiveKindMap[".ifgt"] = DK_IFGT;
5441 DirectiveKindMap[".ifle"] = DK_IFLE;
5442 DirectiveKindMap[".iflt"] = DK_IFLT;
5443 DirectiveKindMap[".ifne"] = DK_IFNE;
5444 DirectiveKindMap[".ifb"] = DK_IFB;
5445 DirectiveKindMap[".ifnb"] = DK_IFNB;
5446 DirectiveKindMap[".ifc"] = DK_IFC;
5447 DirectiveKindMap[".ifeqs"] = DK_IFEQS;
5448 DirectiveKindMap[".ifnc"] = DK_IFNC;
5449 DirectiveKindMap[".ifnes"] = DK_IFNES;
5450 DirectiveKindMap[".ifdef"] = DK_IFDEF;
5451 DirectiveKindMap[".ifndef"] = DK_IFNDEF;
5452 DirectiveKindMap[".ifnotdef"] = DK_IFNOTDEF;
5453 DirectiveKindMap[".elseif"] = DK_ELSEIF;
5454 DirectiveKindMap[".else"] = DK_ELSE;
5455 DirectiveKindMap[".end"] = DK_END;
5456 DirectiveKindMap[".endif"] = DK_ENDIF;
5457 DirectiveKindMap[".skip"] = DK_SKIP;
5458 DirectiveKindMap[".space"] = DK_SPACE;
5459 DirectiveKindMap[".file"] = DK_FILE;
5460 DirectiveKindMap[".line"] = DK_LINE;
5461 DirectiveKindMap[".loc"] = DK_LOC;
5462 DirectiveKindMap[".stabs"] = DK_STABS;
5463 DirectiveKindMap[".cv_file"] = DK_CV_FILE;
5464 DirectiveKindMap[".cv_func_id"] = DK_CV_FUNC_ID;
5465 DirectiveKindMap[".cv_loc"] = DK_CV_LOC;
5466 DirectiveKindMap[".cv_linetable"] = DK_CV_LINETABLE;
5467 DirectiveKindMap[".cv_inline_linetable"] = DK_CV_INLINE_LINETABLE;
5468 DirectiveKindMap[".cv_inline_site_id"] = DK_CV_INLINE_SITE_ID;
5469 DirectiveKindMap[".cv_def_range"] = DK_CV_DEF_RANGE;
5470 DirectiveKindMap[".cv_string"] = DK_CV_STRING;
5471 DirectiveKindMap[".cv_stringtable"] = DK_CV_STRINGTABLE;
5472 DirectiveKindMap[".cv_filechecksums"] = DK_CV_FILECHECKSUMS;
5473 DirectiveKindMap[".cv_filechecksumoffset"] = DK_CV_FILECHECKSUM_OFFSET;
5474 DirectiveKindMap[".cv_fpo_data"] = DK_CV_FPO_DATA;
5475 DirectiveKindMap[".sleb128"] = DK_SLEB128;
5476 DirectiveKindMap[".uleb128"] = DK_ULEB128;
5477 DirectiveKindMap[".cfi_sections"] = DK_CFI_SECTIONS;
5478 DirectiveKindMap[".cfi_startproc"] = DK_CFI_STARTPROC;
5479 DirectiveKindMap[".cfi_endproc"] = DK_CFI_ENDPROC;
5480 DirectiveKindMap[".cfi_def_cfa"] = DK_CFI_DEF_CFA;
5481 DirectiveKindMap[".cfi_def_cfa_offset"] = DK_CFI_DEF_CFA_OFFSET;
5482 DirectiveKindMap[".cfi_adjust_cfa_offset"] = DK_CFI_ADJUST_CFA_OFFSET;
5483 DirectiveKindMap[".cfi_def_cfa_register"] = DK_CFI_DEF_CFA_REGISTER;
5484 DirectiveKindMap[".cfi_offset"] = DK_CFI_OFFSET;
5485 DirectiveKindMap[".cfi_rel_offset"] = DK_CFI_REL_OFFSET;
5486 DirectiveKindMap[".cfi_personality"] = DK_CFI_PERSONALITY;
5487 DirectiveKindMap[".cfi_lsda"] = DK_CFI_LSDA;
5488 DirectiveKindMap[".cfi_remember_state"] = DK_CFI_REMEMBER_STATE;
5489 DirectiveKindMap[".cfi_restore_state"] = DK_CFI_RESTORE_STATE;
5490 DirectiveKindMap[".cfi_same_value"] = DK_CFI_SAME_VALUE;
5491 DirectiveKindMap[".cfi_restore"] = DK_CFI_RESTORE;
5492 DirectiveKindMap[".cfi_escape"] = DK_CFI_ESCAPE;
5493 DirectiveKindMap[".cfi_return_column"] = DK_CFI_RETURN_COLUMN;
5494 DirectiveKindMap[".cfi_signal_frame"] = DK_CFI_SIGNAL_FRAME;
5495 DirectiveKindMap[".cfi_undefined"] = DK_CFI_UNDEFINED;
5496 DirectiveKindMap[".cfi_register"] = DK_CFI_REGISTER;
5497 DirectiveKindMap[".cfi_window_save"] = DK_CFI_WINDOW_SAVE;
5498 DirectiveKindMap[".cfi_b_key_frame"] = DK_CFI_B_KEY_FRAME;
5499 DirectiveKindMap[".macros_on"] = DK_MACROS_ON;
5500 DirectiveKindMap[".macros_off"] = DK_MACROS_OFF;
5501 DirectiveKindMap[".macro"] = DK_MACRO;
5502 DirectiveKindMap[".exitm"] = DK_EXITM;
5503 DirectiveKindMap[".endm"] = DK_ENDM;
5504 DirectiveKindMap[".endmacro"] = DK_ENDMACRO;
5505 DirectiveKindMap[".purgem"] = DK_PURGEM;
5506 DirectiveKindMap[".err"] = DK_ERR;
5507 DirectiveKindMap[".error"] = DK_ERROR;
5508 DirectiveKindMap[".warning"] = DK_WARNING;
5509 DirectiveKindMap[".altmacro"] = DK_ALTMACRO;
5510 DirectiveKindMap[".noaltmacro"] = DK_NOALTMACRO;
5511 DirectiveKindMap[".reloc"] = DK_RELOC;
5512 DirectiveKindMap[".dc"] = DK_DC;
5513 DirectiveKindMap[".dc.a"] = DK_DC_A;
5514 DirectiveKindMap[".dc.b"] = DK_DC_B;
5515 DirectiveKindMap[".dc.d"] = DK_DC_D;
5516 DirectiveKindMap[".dc.l"] = DK_DC_L;
5517 DirectiveKindMap[".dc.s"] = DK_DC_S;
5518 DirectiveKindMap[".dc.w"] = DK_DC_W;
5519 DirectiveKindMap[".dc.x"] = DK_DC_X;
5520 DirectiveKindMap[".dcb"] = DK_DCB;
5521 DirectiveKindMap[".dcb.b"] = DK_DCB_B;
5522 DirectiveKindMap[".dcb.d"] = DK_DCB_D;
5523 DirectiveKindMap[".dcb.l"] = DK_DCB_L;
5524 DirectiveKindMap[".dcb.s"] = DK_DCB_S;
5525 DirectiveKindMap[".dcb.w"] = DK_DCB_W;
5526 DirectiveKindMap[".dcb.x"] = DK_DCB_X;
5527 DirectiveKindMap[".ds"] = DK_DS;
5528 DirectiveKindMap[".ds.b"] = DK_DS_B;
5529 DirectiveKindMap[".ds.d"] = DK_DS_D;
5530 DirectiveKindMap[".ds.l"] = DK_DS_L;
5531 DirectiveKindMap[".ds.p"] = DK_DS_P;
5532 DirectiveKindMap[".ds.s"] = DK_DS_S;
5533 DirectiveKindMap[".ds.w"] = DK_DS_W;
5534 DirectiveKindMap[".ds.x"] = DK_DS_X;
5535 DirectiveKindMap[".print"] = DK_PRINT;
5536 DirectiveKindMap[".addrsig"] = DK_ADDRSIG;
5537 DirectiveKindMap[".addrsig_sym"] = DK_ADDRSIG_SYM;
5538 DirectiveKindMap[".pseudoprobe"] = DK_PSEUDO_PROBE;
5539}
5540
5541MCAsmMacro *AsmParser::parseMacroLikeBody(SMLoc DirectiveLoc) {
5542 AsmToken EndToken, StartToken = getTok();
5543
5544 unsigned NestLevel = 0;
5545 while (true) {
5546 // Check whether we have reached the end of the file.
5547 if (getLexer().is(AsmToken::Eof)) {
5548 printError(DirectiveLoc, "no matching '.endr' in definition");
5549 return nullptr;
5550 }
5551
5552 if (Lexer.is(AsmToken::Identifier) &&
5553 (getTok().getIdentifier() == ".rep" ||
5554 getTok().getIdentifier() == ".rept" ||
5555 getTok().getIdentifier() == ".irp" ||
5556 getTok().getIdentifier() == ".irpc")) {
5557 ++NestLevel;
5558 }
5559
5560 // Otherwise, check whether we have reached the .endr.
5561 if (Lexer.is(AsmToken::Identifier) && getTok().getIdentifier() == ".endr") {
5562 if (NestLevel == 0) {
5563 EndToken = getTok();
5564 Lex();
5565 if (Lexer.isNot(AsmToken::EndOfStatement)) {
5566 printError(getTok().getLoc(),
5567 "unexpected token in '.endr' directive");
5568 return nullptr;
5569 }
5570 break;
5571 }
5572 --NestLevel;
5573 }
5574
5575 // Otherwise, scan till the end of the statement.
5576 eatToEndOfStatement();
5577 }
5578
5579 const char *BodyStart = StartToken.getLoc().getPointer();
5580 const char *BodyEnd = EndToken.getLoc().getPointer();
5581 StringRef Body = StringRef(BodyStart, BodyEnd - BodyStart);
5582
5583 // We Are Anonymous.
5584 MacroLikeBodies.emplace_back(StringRef(), Body, MCAsmMacroParameters());
5585 return &MacroLikeBodies.back();
5586}
5587
5588void AsmParser::instantiateMacroLikeBody(MCAsmMacro *M, SMLoc DirectiveLoc,
5589 raw_svector_ostream &OS) {
5590 OS << ".endr\n";
5591
5592 std::unique_ptr<MemoryBuffer> Instantiation =
5593 MemoryBuffer::getMemBufferCopy(OS.str(), "<instantiation>");
5594
5595 // Create the macro instantiation object and add to the current macro
5596 // instantiation stack.
5597 MacroInstantiation *MI = new MacroInstantiation{
5598 DirectiveLoc, CurBuffer, getTok().getLoc(), TheCondStack.size()};
5599 ActiveMacros.push_back(MI);
5600
5601 // Jump to the macro instantiation and prime the lexer.
5602 CurBuffer = SrcMgr.AddNewSourceBuffer(std::move(Instantiation), SMLoc());
5603 Lexer.setBuffer(SrcMgr.getMemoryBuffer(CurBuffer)->getBuffer());
5604 Lex();
5605}
5606
5607/// parseDirectiveRept
5608/// ::= .rep | .rept count
5609bool AsmParser::parseDirectiveRept(SMLoc DirectiveLoc, StringRef Dir) {
5610 const MCExpr *CountExpr;
5611 SMLoc CountLoc = getTok().getLoc();
5612 if (parseExpression(CountExpr))
5613 return true;
5614
5615 int64_t Count;
5616 if (!CountExpr->evaluateAsAbsolute(Count, getStreamer().getAssemblerPtr())) {
5617 return Error(CountLoc, "unexpected token in '" + Dir + "' directive");
5618 }
5619
5620 if (check(Count < 0, CountLoc, "Count is negative") ||
5621 parseToken(AsmToken::EndOfStatement,
5622 "unexpected token in '" + Dir + "' directive"))
5623 return true;
5624
5625 // Lex the rept definition.
5626 MCAsmMacro *M = parseMacroLikeBody(DirectiveLoc);
5627 if (!M)
5628 return true;
5629
5630 // Macro instantiation is lexical, unfortunately. We construct a new buffer
5631 // to hold the macro body with substitutions.
5632 SmallString<256> Buf;
5633 raw_svector_ostream OS(Buf);
5634 while (Count--) {
5635 // Note that the AtPseudoVariable is disabled for instantiations of .rep(t).
5636 if (expandMacro(OS, M->Body, None, None, false, getTok().getLoc()))
5637 return true;
5638 }
5639 instantiateMacroLikeBody(M, DirectiveLoc, OS);
5640
5641 return false;
5642}
5643
5644/// parseDirectiveIrp
5645/// ::= .irp symbol,values
5646bool AsmParser::parseDirectiveIrp(SMLoc DirectiveLoc) {
5647 MCAsmMacroParameter Parameter;
5648 MCAsmMacroArguments A;
5649 if (check(parseIdentifier(Parameter.Name),
5650 "expected identifier in '.irp' directive") ||
5651 parseToken(AsmToken::Comma, "expected comma in '.irp' directive") ||
5652 parseMacroArguments(nullptr, A) ||
5653 parseToken(AsmToken::EndOfStatement, "expected End of Statement"))
5654 return true;
5655
5656 // Lex the irp definition.
5657 MCAsmMacro *M = parseMacroLikeBody(DirectiveLoc);
5658 if (!M)
5659 return true;
5660
5661 // Macro instantiation is lexical, unfortunately. We construct a new buffer
5662 // to hold the macro body with substitutions.
5663 SmallString<256> Buf;
5664 raw_svector_ostream OS(Buf);
5665
5666 for (const MCAsmMacroArgument &Arg : A) {
5667 // Note that the AtPseudoVariable is enabled for instantiations of .irp.
5668 // This is undocumented, but GAS seems to support it.
5669 if (expandMacro(OS, M->Body, Parameter, Arg, true, getTok().getLoc()))
5670 return true;
5671 }
5672
5673 instantiateMacroLikeBody(M, DirectiveLoc, OS);
5674
5675 return false;
5676}
5677
5678/// parseDirectiveIrpc
5679/// ::= .irpc symbol,values
5680bool AsmParser::parseDirectiveIrpc(SMLoc DirectiveLoc) {
5681 MCAsmMacroParameter Parameter;
5682 MCAsmMacroArguments A;
5683
5684 if (check(parseIdentifier(Parameter.Name),
5685 "expected identifier in '.irpc' directive") ||
5686 parseToken(AsmToken::Comma, "expected comma in '.irpc' directive") ||
5687 parseMacroArguments(nullptr, A))
5688 return true;
5689
5690 if (A.size() != 1 || A.front().size() != 1)
5691 return TokError("unexpected token in '.irpc' directive");
5692
5693 // Eat the end of statement.
5694 if (parseToken(AsmToken::EndOfStatement, "expected end of statement"))
5695 return true;
5696
5697 // Lex the irpc definition.
5698 MCAsmMacro *M = parseMacroLikeBody(DirectiveLoc);
5699 if (!M)
5700 return true;
5701
5702 // Macro instantiation is lexical, unfortunately. We construct a new buffer
5703 // to hold the macro body with substitutions.
5704 SmallString<256> Buf;
5705 raw_svector_ostream OS(Buf);
5706
5707 StringRef Values = A.front().front().getString();
5708 for (std::size_t I = 0, End = Values.size(); I != End; ++I) {
5709 MCAsmMacroArgument Arg;
5710 Arg.emplace_back(AsmToken::Identifier, Values.slice(I, I + 1));
5711
5712 // Note that the AtPseudoVariable is enabled for instantiations of .irpc.
5713 // This is undocumented, but GAS seems to support it.
5714 if (expandMacro(OS, M->Body, Parameter, Arg, true, getTok().getLoc()))
5715 return true;
5716 }
5717
5718 instantiateMacroLikeBody(M, DirectiveLoc, OS);
5719
5720 return false;
5721}
5722
5723bool AsmParser::parseDirectiveEndr(SMLoc DirectiveLoc) {
5724 if (ActiveMacros.empty())
5725 return TokError("unmatched '.endr' directive");
5726
5727 // The only .repl that should get here are the ones created by
5728 // instantiateMacroLikeBody.
5729 assert(getLexer().is(AsmToken::EndOfStatement))((getLexer().is(AsmToken::EndOfStatement)) ? static_cast<void
> (0) : __assert_fail ("getLexer().is(AsmToken::EndOfStatement)"
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/lib/MC/MCParser/AsmParser.cpp"
, 5729, __PRETTY_FUNCTION__))
;
5730
5731 handleMacroExit();
5732 return false;
5733}
5734
5735bool AsmParser::parseDirectiveMSEmit(SMLoc IDLoc, ParseStatementInfo &Info,
5736 size_t Len) {
5737 const MCExpr *Value;
5738 SMLoc ExprLoc = getLexer().getLoc();
5739 if (parseExpression(Value))
5740 return true;
5741 const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Value);
5742 if (!MCE)
5743 return Error(ExprLoc, "unexpected expression in _emit");
5744 uint64_t IntValue = MCE->getValue();
5745 if (!isUInt<8>(IntValue) && !isInt<8>(IntValue))
5746 return Error(ExprLoc, "literal value out of range for directive");
5747
5748 Info.AsmRewrites->emplace_back(AOK_Emit, IDLoc, Len);
5749 return false;
5750}
5751
5752bool AsmParser::parseDirectiveMSAlign(SMLoc IDLoc, ParseStatementInfo &Info) {
5753 const MCExpr *Value;
5754 SMLoc ExprLoc = getLexer().getLoc();
5755 if (parseExpression(Value))
5756 return true;
5757 const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Value);
5758 if (!MCE)
5759 return Error(ExprLoc, "unexpected expression in align");
5760 uint64_t IntValue = MCE->getValue();
5761 if (!isPowerOf2_64(IntValue))
5762 return Error(ExprLoc, "literal value not a power of two greater then zero");
5763
5764 Info.AsmRewrites->emplace_back(AOK_Align, IDLoc, 5, Log2_64(IntValue));
5765 return false;
5766}
5767
5768bool AsmParser::parseDirectivePrint(SMLoc DirectiveLoc) {
5769 const AsmToken StrTok = getTok();
5770 Lex();
5771 if (StrTok.isNot(AsmToken::String) || StrTok.getString().front() != '"')
5772 return Error(DirectiveLoc, "expected double quoted string after .print");
5773 if (parseToken(AsmToken::EndOfStatement, "expected end of statement"))
5774 return true;
5775 llvm::outs() << StrTok.getStringContents() << '\n';
5776 return false;
5777}
5778
5779bool AsmParser::parseDirectiveAddrsig() {
5780 getStreamer().emitAddrsig();
5781 return false;
5782}
5783
5784bool AsmParser::parseDirectiveAddrsigSym() {
5785 StringRef Name;
5786 if (check(parseIdentifier(Name),
5787 "expected identifier in '.addrsig_sym' directive"))
5788 return true;
5789 MCSymbol *Sym = getContext().getOrCreateSymbol(Name);
5790 getStreamer().emitAddrsigSym(Sym);
5791 return false;
5792}
5793
5794bool AsmParser::parseDirectivePseudoProbe() {
5795 int64_t Guid;
30
'Guid' declared without an initial value
5796 int64_t Index;
5797 int64_t Type;
5798 int64_t Attr;
5799
5800 if (getLexer().is(AsmToken::Integer)) {
31
Calling 'MCAsmLexer::is'
37
Returning from 'MCAsmLexer::is'
38
Taking false branch
5801 if (parseIntToken(Guid, "unexpected token in '.pseudoprobe' directive"))
5802 return true;
5803 }
5804
5805 if (getLexer().is(AsmToken::Integer)) {
39
Calling 'MCAsmLexer::is'
45
Returning from 'MCAsmLexer::is'
46
Taking false branch
5806 if (parseIntToken(Index, "unexpected token in '.pseudoprobe' directive"))
5807 return true;
5808 }
5809
5810 if (getLexer().is(AsmToken::Integer)) {
47
Calling 'MCAsmLexer::is'
53
Returning from 'MCAsmLexer::is'
54
Taking false branch
5811 if (parseIntToken(Type, "unexpected token in '.pseudoprobe' directive"))
5812 return true;
5813 }
5814
5815 if (getLexer().is(AsmToken::Integer)) {
55
Calling 'MCAsmLexer::is'
61
Returning from 'MCAsmLexer::is'
62
Taking false branch
5816 if (parseIntToken(Attr, "unexpected token in '.pseudoprobe' directive"))
5817 return true;
5818 }
5819
5820 // Parse inline stack like @ GUID:11:12 @ GUID:1:11 @ GUID:3:21
5821 MCPseudoProbeInlineStack InlineStack;
5822
5823 while (getLexer().is(AsmToken::At)) {
63
Calling 'MCAsmLexer::is'
69
Returning from 'MCAsmLexer::is'
70
Loop condition is false. Execution continues on line 5849
5824 // eat @
5825 Lex();
5826
5827 int64_t CallerGuid = 0;
5828 if (getLexer().is(AsmToken::Integer)) {
5829 if (parseIntToken(CallerGuid,
5830 "unexpected token in '.pseudoprobe' directive"))
5831 return true;
5832 }
5833
5834 // eat colon
5835 if (getLexer().is(AsmToken::Colon))
5836 Lex();
5837
5838 int64_t CallerProbeId = 0;
5839 if (getLexer().is(AsmToken::Integer)) {
5840 if (parseIntToken(CallerProbeId,
5841 "unexpected token in '.pseudoprobe' directive"))
5842 return true;
5843 }
5844
5845 InlineSite Site(CallerGuid, CallerProbeId);
5846 InlineStack.push_back(Site);
5847 }
5848
5849 if (parseToken(AsmToken::EndOfStatement,
71
Assuming the condition is false
72
Taking false branch
5850 "unexpected token in '.pseudoprobe' directive"))
5851 return true;
5852
5853 getStreamer().emitPseudoProbe(Guid, Index, Type, Attr, InlineStack);
73
1st function call argument is an uninitialized value
5854 return false;
5855}
5856
5857// We are comparing pointers, but the pointers are relative to a single string.
5858// Thus, this should always be deterministic.
5859static int rewritesSort(const AsmRewrite *AsmRewriteA,
5860 const AsmRewrite *AsmRewriteB) {
5861 if (AsmRewriteA->Loc.getPointer() < AsmRewriteB->Loc.getPointer())
5862 return -1;
5863 if (AsmRewriteB->Loc.getPointer() < AsmRewriteA->Loc.getPointer())
5864 return 1;
5865
5866 // It's possible to have a SizeDirective, Imm/ImmPrefix and an Input/Output
5867 // rewrite to the same location. Make sure the SizeDirective rewrite is
5868 // performed first, then the Imm/ImmPrefix and finally the Input/Output. This
5869 // ensures the sort algorithm is stable.
5870 if (AsmRewritePrecedence[AsmRewriteA->Kind] >
5871 AsmRewritePrecedence[AsmRewriteB->Kind])
5872 return -1;
5873
5874 if (AsmRewritePrecedence[AsmRewriteA->Kind] <
5875 AsmRewritePrecedence[AsmRewriteB->Kind])
5876 return 1;
5877 llvm_unreachable("Unstable rewrite sort.")::llvm::llvm_unreachable_internal("Unstable rewrite sort.", "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/lib/MC/MCParser/AsmParser.cpp"
, 5877)
;
5878}
5879
5880bool AsmParser::parseMSInlineAsm(
5881 void *AsmLoc, std::string &AsmString, unsigned &NumOutputs,
5882 unsigned &NumInputs, SmallVectorImpl<std::pair<void *, bool>> &OpDecls,
5883 SmallVectorImpl<std::string> &Constraints,
5884 SmallVectorImpl<std::string> &Clobbers, const MCInstrInfo *MII,
5885 const MCInstPrinter *IP, MCAsmParserSemaCallback &SI) {
5886 SmallVector<void *, 4> InputDecls;
5887 SmallVector<void *, 4> OutputDecls;
5888 SmallVector<bool, 4> InputDeclsAddressOf;
5889 SmallVector<bool, 4> OutputDeclsAddressOf;
5890 SmallVector<std::string, 4> InputConstraints;
5891 SmallVector<std::string, 4> OutputConstraints;
5892 SmallVector<unsigned, 4> ClobberRegs;
5893
5894 SmallVector<AsmRewrite, 4> AsmStrRewrites;
5895
5896 // Prime the lexer.
5897 Lex();
5898
5899 // While we have input, parse each statement.
5900 unsigned InputIdx = 0;
5901 unsigned OutputIdx = 0;
5902 while (getLexer().isNot(AsmToken::Eof)) {
5903 // Parse curly braces marking block start/end
5904 if (parseCurlyBlockScope(AsmStrRewrites))
5905 continue;
5906
5907 ParseStatementInfo Info(&AsmStrRewrites);
5908 bool StatementErr = parseStatement(Info, &SI);
5909
5910 if (StatementErr || Info.ParseError) {
5911 // Emit pending errors if any exist.
5912 printPendingErrors();
5913 return true;
5914 }
5915
5916 // No pending error should exist here.
5917 assert(!hasPendingError() && "unexpected error from parseStatement")((!hasPendingError() && "unexpected error from parseStatement"
) ? static_cast<void> (0) : __assert_fail ("!hasPendingError() && \"unexpected error from parseStatement\""
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/lib/MC/MCParser/AsmParser.cpp"
, 5917, __PRETTY_FUNCTION__))
;
5918
5919 if (Info.Opcode == ~0U)
5920 continue;
5921
5922 const MCInstrDesc &Desc = MII->get(Info.Opcode);
5923
5924 // Build the list of clobbers, outputs and inputs.
5925 for (unsigned i = 1, e = Info.ParsedOperands.size(); i != e; ++i) {
5926 MCParsedAsmOperand &Operand = *Info.ParsedOperands[i];
5927
5928 // Register operand.
5929 if (Operand.isReg() && !Operand.needAddressOf() &&
5930 !getTargetParser().OmitRegisterFromClobberLists(Operand.getReg())) {
5931 unsigned NumDefs = Desc.getNumDefs();
5932 // Clobber.
5933 if (NumDefs && Operand.getMCOperandNum() < NumDefs)
5934 ClobberRegs.push_back(Operand.getReg());
5935 continue;
5936 }
5937
5938 // Expr/Input or Output.
5939 StringRef SymName = Operand.getSymName();
5940 if (SymName.empty())
5941 continue;
5942
5943 void *OpDecl = Operand.getOpDecl();
5944 if (!OpDecl)
5945 continue;
5946
5947 StringRef Constraint = Operand.getConstraint();
5948 if (Operand.isImm()) {
5949 // Offset as immediate
5950 if (Operand.isOffsetOfLocal())
5951 Constraint = "r";
5952 else
5953 Constraint = "i";
5954 }
5955
5956 bool isOutput = (i == 1) && Desc.mayStore();
5957 SMLoc Start = SMLoc::getFromPointer(SymName.data());
5958 if (isOutput) {
5959 ++InputIdx;
5960 OutputDecls.push_back(OpDecl);
5961 OutputDeclsAddressOf.push_back(Operand.needAddressOf());
5962 OutputConstraints.push_back(("=" + Constraint).str());
5963 AsmStrRewrites.emplace_back(AOK_Output, Start, SymName.size());
5964 } else {
5965 InputDecls.push_back(OpDecl);
5966 InputDeclsAddressOf.push_back(Operand.needAddressOf());
5967 InputConstraints.push_back(Constraint.str());
5968 if (Desc.OpInfo[i - 1].isBranchTarget())
5969 AsmStrRewrites.emplace_back(AOK_CallInput, Start, SymName.size());
5970 else
5971 AsmStrRewrites.emplace_back(AOK_Input, Start, SymName.size());
5972 }
5973 }
5974
5975 // Consider implicit defs to be clobbers. Think of cpuid and push.
5976 ArrayRef<MCPhysReg> ImpDefs(Desc.getImplicitDefs(),
5977 Desc.getNumImplicitDefs());
5978 llvm::append_range(ClobberRegs, ImpDefs);
5979 }
5980
5981 // Set the number of Outputs and Inputs.
5982 NumOutputs = OutputDecls.size();
5983 NumInputs = InputDecls.size();
5984
5985 // Set the unique clobbers.
5986 array_pod_sort(ClobberRegs.begin(), ClobberRegs.end());
5987 ClobberRegs.erase(std::unique(ClobberRegs.begin(), ClobberRegs.end()),
5988 ClobberRegs.end());
5989 Clobbers.assign(ClobberRegs.size(), std::string());
5990 for (unsigned I = 0, E = ClobberRegs.size(); I != E; ++I) {
5991 raw_string_ostream OS(Clobbers[I]);
5992 IP->printRegName(OS, ClobberRegs[I]);
5993 }
5994
5995 // Merge the various outputs and inputs. Output are expected first.
5996 if (NumOutputs || NumInputs) {
5997 unsigned NumExprs = NumOutputs + NumInputs;
5998 OpDecls.resize(NumExprs);
5999 Constraints.resize(NumExprs);
6000 for (unsigned i = 0; i < NumOutputs; ++i) {
6001 OpDecls[i] = std::make_pair(OutputDecls[i], OutputDeclsAddressOf[i]);
6002 Constraints[i] = OutputConstraints[i];
6003 }
6004 for (unsigned i = 0, j = NumOutputs; i < NumInputs; ++i, ++j) {
6005 OpDecls[j] = std::make_pair(InputDecls[i], InputDeclsAddressOf[i]);
6006 Constraints[j] = InputConstraints[i];
6007 }
6008 }
6009
6010 // Build the IR assembly string.
6011 std::string AsmStringIR;
6012 raw_string_ostream OS(AsmStringIR);
6013 StringRef ASMString =
6014 SrcMgr.getMemoryBuffer(SrcMgr.getMainFileID())->getBuffer();
6015 const char *AsmStart = ASMString.begin();
6016 const char *AsmEnd = ASMString.end();
6017 array_pod_sort(AsmStrRewrites.begin(), AsmStrRewrites.end(), rewritesSort);
6018 for (auto it = AsmStrRewrites.begin(); it != AsmStrRewrites.end(); ++it) {
6019 const AsmRewrite &AR = *it;
6020 // Check if this has already been covered by another rewrite...
6021 if (AR.Done)
6022 continue;
6023 AsmRewriteKind Kind = AR.Kind;
6024
6025 const char *Loc = AR.Loc.getPointer();
6026 assert(Loc >= AsmStart && "Expected Loc to be at or after Start!")((Loc >= AsmStart && "Expected Loc to be at or after Start!"
) ? static_cast<void> (0) : __assert_fail ("Loc >= AsmStart && \"Expected Loc to be at or after Start!\""
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/lib/MC/MCParser/AsmParser.cpp"
, 6026, __PRETTY_FUNCTION__))
;
6027
6028 // Emit everything up to the immediate/expression.
6029 if (unsigned Len = Loc - AsmStart)
6030 OS << StringRef(AsmStart, Len);
6031
6032 // Skip the original expression.
6033 if (Kind == AOK_Skip) {
6034 AsmStart = Loc + AR.Len;
6035 continue;
6036 }
6037
6038 unsigned AdditionalSkip = 0;
6039 // Rewrite expressions in $N notation.
6040 switch (Kind) {
6041 default:
6042 break;
6043 case AOK_IntelExpr:
6044 assert(AR.IntelExp.isValid() && "cannot write invalid intel expression")((AR.IntelExp.isValid() && "cannot write invalid intel expression"
) ? static_cast<void> (0) : __assert_fail ("AR.IntelExp.isValid() && \"cannot write invalid intel expression\""
, "/build/llvm-toolchain-snapshot-12~++20210115100614+a14c36fe27f5/llvm/lib/MC/MCParser/AsmParser.cpp"
, 6044, __PRETTY_FUNCTION__))
;
6045 if (AR.IntelExp.NeedBracs)
6046 OS << "[";
6047 if (AR.IntelExp.hasBaseReg())
6048 OS << AR.IntelExp.BaseReg;
6049 if (AR.IntelExp.hasIndexReg())
6050 OS << (AR.IntelExp.hasBaseReg() ? " + " : "")
6051 << AR.IntelExp.IndexReg;
6052 if (AR.IntelExp.Scale > 1)
6053 OS << " * $$" << AR.IntelExp.Scale;
6054 if (AR.IntelExp.hasOffset()) {
6055 if (AR.IntelExp.hasRegs())
6056 OS << " + ";
6057 // Fuse this rewrite with a rewrite of the offset name, if present.
6058 StringRef OffsetName = AR.IntelExp.OffsetName;
6059 SMLoc OffsetLoc = SMLoc::getFromPointer(AR.IntelExp.OffsetName.data());
6060 size_t OffsetLen = OffsetName.size();
6061 auto rewrite_it = std::find_if(
6062 it, AsmStrRewrites.end(), [&](const AsmRewrite &FusingAR) {
6063 return FusingAR.Loc == OffsetLoc && FusingAR.Len == OffsetLen &&
6064 (FusingAR.Kind == AOK_Input ||
6065 FusingAR.Kind == AOK_CallInput);
6066 });
6067 if (rewrite_it == AsmStrRewrites.end()) {
6068 OS << "offset " << OffsetName;
6069 } else if (rewrite_it->Kind == AOK_CallInput) {
6070 OS << "${" << InputIdx++ << ":P}";
6071 rewrite_it->Done = true;
6072 } else {
6073 OS << '$' << InputIdx++;
6074 rewrite_it->Done = true;
6075 }
6076 }
6077 if (AR.IntelExp.Imm || AR.IntelExp.emitImm())
6078 OS << (AR.IntelExp.emitImm() ? "$$" : " + $$") << AR.IntelExp.Imm;
6079 if (AR.IntelExp.NeedBracs)
6080 OS << "]";
6081 break;
6082 case AOK_Label:
6083 OS << Ctx.getAsmInfo()->getPrivateLabelPrefix() << AR.Label;
6084 break;
6085 case AOK_Input:
6086 OS << '$' << InputIdx++;
6087 break;
6088 case AOK_CallInput:
6089 OS << "${" << InputIdx++ << ":P}";
6090 break;
6091 case AOK_Output:
6092 OS << '$' << OutputIdx++;
6093 break;
6094 case AOK_SizeDirective:
6095 switch (AR.Val) {
6096 default: break;
6097 case 8: OS << "byte ptr "; break;
6098 case 16: OS << "word ptr "; break;
6099 case 32: OS << "dword ptr "; break;
6100 case 64: OS << "qword ptr "; break;
6101 case 80: OS << "xword ptr "; break;
6102 case 128: OS << "xmmword ptr "; break;
6103 case 256: OS << "ymmword ptr "; break;
6104 }
6105 break;
6106 case AOK_Emit:
6107 OS << ".byte";
6108