Bug Summary

File:llvm/lib/MC/MCParser/AsmParser.cpp
Warning:line 2823, column 66
Forming reference to null pointer

Annotated Source Code

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clang -cc1 -cc1 -triple x86_64-pc-linux-gnu -analyze -disable-free -disable-llvm-verifier -discard-value-names -main-file-name AsmParser.cpp -analyzer-store=region -analyzer-opt-analyze-nested-blocks -analyzer-checker=core -analyzer-checker=apiModeling -analyzer-checker=unix -analyzer-checker=deadcode -analyzer-checker=cplusplus -analyzer-checker=security.insecureAPI.UncheckedReturn -analyzer-checker=security.insecureAPI.getpw -analyzer-checker=security.insecureAPI.gets -analyzer-checker=security.insecureAPI.mktemp -analyzer-checker=security.insecureAPI.mkstemp -analyzer-checker=security.insecureAPI.vfork -analyzer-checker=nullability.NullPassedToNonnull -analyzer-checker=nullability.NullReturnedFromNonnull -analyzer-output plist -w -setup-static-analyzer -analyzer-config-compatibility-mode=true -mrelocation-model pic -pic-level 2 -mframe-pointer=none -fmath-errno -fno-rounding-math -mconstructor-aliases -munwind-tables -target-cpu x86-64 -tune-cpu generic -debugger-tuning=gdb -ffunction-sections -fdata-sections -fcoverage-compilation-dir=/build/llvm-toolchain-snapshot-14~++20210903100615+fd66b44ec19e/build-llvm/lib/MC/MCParser -resource-dir /usr/lib/llvm-14/lib/clang/14.0.0 -D _GNU_SOURCE -D __STDC_CONSTANT_MACROS -D __STDC_FORMAT_MACROS -D __STDC_LIMIT_MACROS -I /build/llvm-toolchain-snapshot-14~++20210903100615+fd66b44ec19e/build-llvm/lib/MC/MCParser -I /build/llvm-toolchain-snapshot-14~++20210903100615+fd66b44ec19e/llvm/lib/MC/MCParser -I /build/llvm-toolchain-snapshot-14~++20210903100615+fd66b44ec19e/build-llvm/include -I /build/llvm-toolchain-snapshot-14~++20210903100615+fd66b44ec19e/llvm/include -D NDEBUG -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/10/../../../../include/x86_64-linux-gnu/c++/10 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10/backward -internal-isystem /usr/lib/llvm-14/lib/clang/14.0.0/include -internal-isystem /usr/local/include -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/10/../../../../x86_64-linux-gnu/include -internal-externc-isystem /usr/include/x86_64-linux-gnu -internal-externc-isystem /include -internal-externc-isystem /usr/include -O2 -Wno-unused-parameter -Wwrite-strings -Wno-missing-field-initializers -Wno-long-long -Wno-maybe-uninitialized -Wno-class-memaccess -Wno-redundant-move -Wno-pessimizing-move -Wno-noexcept-type -Wno-comment -std=c++14 -fdeprecated-macro -fdebug-compilation-dir=/build/llvm-toolchain-snapshot-14~++20210903100615+fd66b44ec19e/build-llvm/lib/MC/MCParser -fdebug-prefix-map=/build/llvm-toolchain-snapshot-14~++20210903100615+fd66b44ec19e=. -ferror-limit 19 -fvisibility-inlines-hidden -stack-protector 2 -fgnuc-version=4.2.1 -vectorize-loops -vectorize-slp -analyzer-output=html -analyzer-config stable-report-filename=true -faddrsig -D__GCC_HAVE_DWARF2_CFI_ASM=1 -o /tmp/scan-build-2021-09-04-040900-46481-1 -x c++ /build/llvm-toolchain-snapshot-14~++20210903100615+fd66b44ec19e/llvm/lib/MC/MCParser/AsmParser.cpp

/build/llvm-toolchain-snapshot-14~++20210903100615+fd66b44ec19e/llvm/lib/MC/MCParser/AsmParser.cpp

1//===- AsmParser.cpp - Parser for Assembly Files --------------------------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8//
9// This class implements a parser for assembly files similar to gas syntax.
10//
11//===----------------------------------------------------------------------===//
12
13#include "llvm/ADT/APFloat.h"
14#include "llvm/ADT/APInt.h"
15#include "llvm/ADT/ArrayRef.h"
16#include "llvm/ADT/None.h"
17#include "llvm/ADT/STLExtras.h"
18#include "llvm/ADT/SmallSet.h"
19#include "llvm/ADT/SmallString.h"
20#include "llvm/ADT/SmallVector.h"
21#include "llvm/ADT/StringExtras.h"
22#include "llvm/ADT/StringMap.h"
23#include "llvm/ADT/StringRef.h"
24#include "llvm/ADT/Twine.h"
25#include "llvm/BinaryFormat/Dwarf.h"
26#include "llvm/DebugInfo/CodeView/SymbolRecord.h"
27#include "llvm/MC/MCAsmInfo.h"
28#include "llvm/MC/MCCodeView.h"
29#include "llvm/MC/MCContext.h"
30#include "llvm/MC/MCDirectives.h"
31#include "llvm/MC/MCDwarf.h"
32#include "llvm/MC/MCExpr.h"
33#include "llvm/MC/MCInstPrinter.h"
34#include "llvm/MC/MCInstrDesc.h"
35#include "llvm/MC/MCInstrInfo.h"
36#include "llvm/MC/MCObjectFileInfo.h"
37#include "llvm/MC/MCParser/AsmCond.h"
38#include "llvm/MC/MCParser/AsmLexer.h"
39#include "llvm/MC/MCParser/MCAsmLexer.h"
40#include "llvm/MC/MCParser/MCAsmParser.h"
41#include "llvm/MC/MCParser/MCAsmParserExtension.h"
42#include "llvm/MC/MCParser/MCAsmParserUtils.h"
43#include "llvm/MC/MCParser/MCParsedAsmOperand.h"
44#include "llvm/MC/MCParser/MCTargetAsmParser.h"
45#include "llvm/MC/MCRegisterInfo.h"
46#include "llvm/MC/MCSection.h"
47#include "llvm/MC/MCStreamer.h"
48#include "llvm/MC/MCSymbol.h"
49#include "llvm/MC/MCTargetOptions.h"
50#include "llvm/MC/MCValue.h"
51#include "llvm/Support/Casting.h"
52#include "llvm/Support/CommandLine.h"
53#include "llvm/Support/ErrorHandling.h"
54#include "llvm/Support/MD5.h"
55#include "llvm/Support/MathExtras.h"
56#include "llvm/Support/MemoryBuffer.h"
57#include "llvm/Support/SMLoc.h"
58#include "llvm/Support/SourceMgr.h"
59#include "llvm/Support/raw_ostream.h"
60#include <algorithm>
61#include <cassert>
62#include <cctype>
63#include <climits>
64#include <cstddef>
65#include <cstdint>
66#include <deque>
67#include <memory>
68#include <sstream>
69#include <string>
70#include <tuple>
71#include <utility>
72#include <vector>
73
74using namespace llvm;
75
76MCAsmParserSemaCallback::~MCAsmParserSemaCallback() = default;
77
78extern cl::opt<unsigned> AsmMacroMaxNestingDepth;
79
80namespace {
81
82/// Helper types for tracking macro definitions.
83typedef std::vector<AsmToken> MCAsmMacroArgument;
84typedef std::vector<MCAsmMacroArgument> MCAsmMacroArguments;
85
86/// Helper class for storing information about an active macro
87/// instantiation.
88struct MacroInstantiation {
89 /// The location of the instantiation.
90 SMLoc InstantiationLoc;
91
92 /// The buffer where parsing should resume upon instantiation completion.
93 unsigned ExitBuffer;
94
95 /// The location where parsing should resume upon instantiation completion.
96 SMLoc ExitLoc;
97
98 /// The depth of TheCondStack at the start of the instantiation.
99 size_t CondStackDepth;
100};
101
102struct ParseStatementInfo {
103 /// The parsed operands from the last parsed statement.
104 SmallVector<std::unique_ptr<MCParsedAsmOperand>, 8> ParsedOperands;
105
106 /// The opcode from the last parsed instruction.
107 unsigned Opcode = ~0U;
108
109 /// Was there an error parsing the inline assembly?
110 bool ParseError = false;
111
112 SmallVectorImpl<AsmRewrite> *AsmRewrites = nullptr;
113
114 ParseStatementInfo() = delete;
115 ParseStatementInfo(SmallVectorImpl<AsmRewrite> *rewrites)
116 : AsmRewrites(rewrites) {}
117};
118
119/// The concrete assembly parser instance.
120class AsmParser : public MCAsmParser {
121private:
122 AsmLexer Lexer;
123 MCContext &Ctx;
124 MCStreamer &Out;
125 const MCAsmInfo &MAI;
126 SourceMgr &SrcMgr;
127 SourceMgr::DiagHandlerTy SavedDiagHandler;
128 void *SavedDiagContext;
129 std::unique_ptr<MCAsmParserExtension> PlatformParser;
130 SMLoc StartTokLoc;
131
132 /// This is the current buffer index we're lexing from as managed by the
133 /// SourceMgr object.
134 unsigned CurBuffer;
135
136 AsmCond TheCondState;
137 std::vector<AsmCond> TheCondStack;
138
139 /// maps directive names to handler methods in parser
140 /// extensions. Extensions register themselves in this map by calling
141 /// addDirectiveHandler.
142 StringMap<ExtensionDirectiveHandler> ExtensionDirectiveMap;
143
144 /// Stack of active macro instantiations.
145 std::vector<MacroInstantiation*> ActiveMacros;
146
147 /// List of bodies of anonymous macros.
148 std::deque<MCAsmMacro> MacroLikeBodies;
149
150 /// Boolean tracking whether macro substitution is enabled.
151 unsigned MacrosEnabledFlag : 1;
152
153 /// Keeps track of how many .macro's have been instantiated.
154 unsigned NumOfMacroInstantiations;
155
156 /// The values from the last parsed cpp hash file line comment if any.
157 struct CppHashInfoTy {
158 StringRef Filename;
159 int64_t LineNumber;
160 SMLoc Loc;
161 unsigned Buf;
162 CppHashInfoTy() : Filename(), LineNumber(0), Loc(), Buf(0) {}
163 };
164 CppHashInfoTy CppHashInfo;
165
166 /// The filename from the first cpp hash file line comment, if any.
167 StringRef FirstCppHashFilename;
168
169 /// List of forward directional labels for diagnosis at the end.
170 SmallVector<std::tuple<SMLoc, CppHashInfoTy, MCSymbol *>, 4> DirLabels;
171
172 SmallSet<StringRef, 2> LTODiscardSymbols;
173
174 /// AssemblerDialect. ~OU means unset value and use value provided by MAI.
175 unsigned AssemblerDialect = ~0U;
176
177 /// is Darwin compatibility enabled?
178 bool IsDarwin = false;
179
180 /// Are we parsing ms-style inline assembly?
181 bool ParsingMSInlineAsm = false;
182
183 /// Did we already inform the user about inconsistent MD5 usage?
184 bool ReportedInconsistentMD5 = false;
185
186 // Is alt macro mode enabled.
187 bool AltMacroMode = false;
188
189protected:
190 virtual bool parseStatement(ParseStatementInfo &Info,
191 MCAsmParserSemaCallback *SI);
192
193 /// This routine uses the target specific ParseInstruction function to
194 /// parse an instruction into Operands, and then call the target specific
195 /// MatchAndEmit function to match and emit the instruction.
196 bool parseAndMatchAndEmitTargetInstruction(ParseStatementInfo &Info,
197 StringRef IDVal, AsmToken ID,
198 SMLoc IDLoc);
199
200 /// Should we emit DWARF describing this assembler source? (Returns false if
201 /// the source has .file directives, which means we don't want to generate
202 /// info describing the assembler source itself.)
203 bool enabledGenDwarfForAssembly();
204
205public:
206 AsmParser(SourceMgr &SM, MCContext &Ctx, MCStreamer &Out,
207 const MCAsmInfo &MAI, unsigned CB);
208 AsmParser(const AsmParser &) = delete;
209 AsmParser &operator=(const AsmParser &) = delete;
210 ~AsmParser() override;
211
212 bool Run(bool NoInitialTextSection, bool NoFinalize = false) override;
213
214 void addDirectiveHandler(StringRef Directive,
215 ExtensionDirectiveHandler Handler) override {
216 ExtensionDirectiveMap[Directive] = Handler;
217 }
218
219 void addAliasForDirective(StringRef Directive, StringRef Alias) override {
220 DirectiveKindMap[Directive.lower()] = DirectiveKindMap[Alias.lower()];
221 }
222
223 /// @name MCAsmParser Interface
224 /// {
225
226 SourceMgr &getSourceManager() override { return SrcMgr; }
227 MCAsmLexer &getLexer() override { return Lexer; }
228 MCContext &getContext() override { return Ctx; }
229 MCStreamer &getStreamer() override { return Out; }
230
231 CodeViewContext &getCVContext() { return Ctx.getCVContext(); }
232
233 unsigned getAssemblerDialect() override {
234 if (AssemblerDialect == ~0U)
235 return MAI.getAssemblerDialect();
236 else
237 return AssemblerDialect;
238 }
239 void setAssemblerDialect(unsigned i) override {
240 AssemblerDialect = i;
241 }
242
243 void Note(SMLoc L, const Twine &Msg, SMRange Range = None) override;
244 bool Warning(SMLoc L, const Twine &Msg, SMRange Range = None) override;
245 bool printError(SMLoc L, const Twine &Msg, SMRange Range = None) override;
246
247 const AsmToken &Lex() override;
248
249 void setParsingMSInlineAsm(bool V) override {
250 ParsingMSInlineAsm = V;
251 // When parsing MS inline asm, we must lex 0b1101 and 0ABCH as binary and
252 // hex integer literals.
253 Lexer.setLexMasmIntegers(V);
254 }
255 bool isParsingMSInlineAsm() override { return ParsingMSInlineAsm; }
256
257 bool discardLTOSymbol(StringRef Name) const override {
258 return LTODiscardSymbols.contains(Name);
259 }
260
261 bool parseMSInlineAsm(std::string &AsmString, unsigned &NumOutputs,
262 unsigned &NumInputs,
263 SmallVectorImpl<std::pair<void *, bool>> &OpDecls,
264 SmallVectorImpl<std::string> &Constraints,
265 SmallVectorImpl<std::string> &Clobbers,
266 const MCInstrInfo *MII, const MCInstPrinter *IP,
267 MCAsmParserSemaCallback &SI) override;
268
269 bool parseExpression(const MCExpr *&Res);
270 bool parseExpression(const MCExpr *&Res, SMLoc &EndLoc) override;
271 bool parsePrimaryExpr(const MCExpr *&Res, SMLoc &EndLoc,
272 AsmTypeInfo *TypeInfo) override;
273 bool parseParenExpression(const MCExpr *&Res, SMLoc &EndLoc) override;
274 bool parseParenExprOfDepth(unsigned ParenDepth, const MCExpr *&Res,
275 SMLoc &EndLoc) override;
276 bool parseAbsoluteExpression(int64_t &Res) override;
277
278 /// Parse a floating point expression using the float \p Semantics
279 /// and set \p Res to the value.
280 bool parseRealValue(const fltSemantics &Semantics, APInt &Res);
281
282 /// Parse an identifier or string (as a quoted identifier)
283 /// and set \p Res to the identifier contents.
284 bool parseIdentifier(StringRef &Res) override;
285 void eatToEndOfStatement() override;
286
287 bool checkForValidSection() override;
288
289 /// }
290
291private:
292 bool parseCurlyBlockScope(SmallVectorImpl<AsmRewrite>& AsmStrRewrites);
293 bool parseCppHashLineFilenameComment(SMLoc L, bool SaveLocInfo = true);
294
295 void checkForBadMacro(SMLoc DirectiveLoc, StringRef Name, StringRef Body,
296 ArrayRef<MCAsmMacroParameter> Parameters);
297 bool expandMacro(raw_svector_ostream &OS, StringRef Body,
298 ArrayRef<MCAsmMacroParameter> Parameters,
299 ArrayRef<MCAsmMacroArgument> A, bool EnableAtPseudoVariable,
300 SMLoc L);
301
302 /// Are macros enabled in the parser?
303 bool areMacrosEnabled() {return MacrosEnabledFlag;}
304
305 /// Control a flag in the parser that enables or disables macros.
306 void setMacrosEnabled(bool Flag) {MacrosEnabledFlag = Flag;}
307
308 /// Are we inside a macro instantiation?
309 bool isInsideMacroInstantiation() {return !ActiveMacros.empty();}
310
311 /// Handle entry to macro instantiation.
312 ///
313 /// \param M The macro.
314 /// \param NameLoc Instantiation location.
315 bool handleMacroEntry(const MCAsmMacro *M, SMLoc NameLoc);
316
317 /// Handle exit from macro instantiation.
318 void handleMacroExit();
319
320 /// Extract AsmTokens for a macro argument.
321 bool parseMacroArgument(MCAsmMacroArgument &MA, bool Vararg);
322
323 /// Parse all macro arguments for a given macro.
324 bool parseMacroArguments(const MCAsmMacro *M, MCAsmMacroArguments &A);
325
326 void printMacroInstantiations();
327 void printMessage(SMLoc Loc, SourceMgr::DiagKind Kind, const Twine &Msg,
328 SMRange Range = None) const {
329 ArrayRef<SMRange> Ranges(Range);
330 SrcMgr.PrintMessage(Loc, Kind, Msg, Ranges);
331 }
332 static void DiagHandler(const SMDiagnostic &Diag, void *Context);
333
334 /// Enter the specified file. This returns true on failure.
335 bool enterIncludeFile(const std::string &Filename);
336
337 /// Process the specified file for the .incbin directive.
338 /// This returns true on failure.
339 bool processIncbinFile(const std::string &Filename, int64_t Skip = 0,
340 const MCExpr *Count = nullptr, SMLoc Loc = SMLoc());
341
342 /// Reset the current lexer position to that given by \p Loc. The
343 /// current token is not set; clients should ensure Lex() is called
344 /// subsequently.
345 ///
346 /// \param InBuffer If not 0, should be the known buffer id that contains the
347 /// location.
348 void jumpToLoc(SMLoc Loc, unsigned InBuffer = 0);
349
350 /// Parse up to the end of statement and a return the contents from the
351 /// current token until the end of the statement; the current token on exit
352 /// will be either the EndOfStatement or EOF.
353 StringRef parseStringToEndOfStatement() override;
354
355 /// Parse until the end of a statement or a comma is encountered,
356 /// return the contents from the current token up to the end or comma.
357 StringRef parseStringToComma();
358
359 bool parseAssignment(StringRef Name, bool allow_redef,
360 bool NoDeadStrip = false);
361
362 unsigned getBinOpPrecedence(AsmToken::TokenKind K,
363 MCBinaryExpr::Opcode &Kind);
364
365 bool parseBinOpRHS(unsigned Precedence, const MCExpr *&Res, SMLoc &EndLoc);
366 bool parseParenExpr(const MCExpr *&Res, SMLoc &EndLoc);
367 bool parseBracketExpr(const MCExpr *&Res, SMLoc &EndLoc);
368
369 bool parseRegisterOrRegisterNumber(int64_t &Register, SMLoc DirectiveLoc);
370
371 bool parseCVFunctionId(int64_t &FunctionId, StringRef DirectiveName);
372 bool parseCVFileId(int64_t &FileId, StringRef DirectiveName);
373
374 // Generic (target and platform independent) directive parsing.
375 enum DirectiveKind {
376 DK_NO_DIRECTIVE, // Placeholder
377 DK_SET,
378 DK_EQU,
379 DK_EQUIV,
380 DK_ASCII,
381 DK_ASCIZ,
382 DK_STRING,
383 DK_BYTE,
384 DK_SHORT,
385 DK_RELOC,
386 DK_VALUE,
387 DK_2BYTE,
388 DK_LONG,
389 DK_INT,
390 DK_4BYTE,
391 DK_QUAD,
392 DK_8BYTE,
393 DK_OCTA,
394 DK_DC,
395 DK_DC_A,
396 DK_DC_B,
397 DK_DC_D,
398 DK_DC_L,
399 DK_DC_S,
400 DK_DC_W,
401 DK_DC_X,
402 DK_DCB,
403 DK_DCB_B,
404 DK_DCB_D,
405 DK_DCB_L,
406 DK_DCB_S,
407 DK_DCB_W,
408 DK_DCB_X,
409 DK_DS,
410 DK_DS_B,
411 DK_DS_D,
412 DK_DS_L,
413 DK_DS_P,
414 DK_DS_S,
415 DK_DS_W,
416 DK_DS_X,
417 DK_SINGLE,
418 DK_FLOAT,
419 DK_DOUBLE,
420 DK_ALIGN,
421 DK_ALIGN32,
422 DK_BALIGN,
423 DK_BALIGNW,
424 DK_BALIGNL,
425 DK_P2ALIGN,
426 DK_P2ALIGNW,
427 DK_P2ALIGNL,
428 DK_ORG,
429 DK_FILL,
430 DK_ENDR,
431 DK_BUNDLE_ALIGN_MODE,
432 DK_BUNDLE_LOCK,
433 DK_BUNDLE_UNLOCK,
434 DK_ZERO,
435 DK_EXTERN,
436 DK_GLOBL,
437 DK_GLOBAL,
438 DK_LAZY_REFERENCE,
439 DK_NO_DEAD_STRIP,
440 DK_SYMBOL_RESOLVER,
441 DK_PRIVATE_EXTERN,
442 DK_REFERENCE,
443 DK_WEAK_DEFINITION,
444 DK_WEAK_REFERENCE,
445 DK_WEAK_DEF_CAN_BE_HIDDEN,
446 DK_COLD,
447 DK_COMM,
448 DK_COMMON,
449 DK_LCOMM,
450 DK_ABORT,
451 DK_INCLUDE,
452 DK_INCBIN,
453 DK_CODE16,
454 DK_CODE16GCC,
455 DK_REPT,
456 DK_IRP,
457 DK_IRPC,
458 DK_IF,
459 DK_IFEQ,
460 DK_IFGE,
461 DK_IFGT,
462 DK_IFLE,
463 DK_IFLT,
464 DK_IFNE,
465 DK_IFB,
466 DK_IFNB,
467 DK_IFC,
468 DK_IFEQS,
469 DK_IFNC,
470 DK_IFNES,
471 DK_IFDEF,
472 DK_IFNDEF,
473 DK_IFNOTDEF,
474 DK_ELSEIF,
475 DK_ELSE,
476 DK_ENDIF,
477 DK_SPACE,
478 DK_SKIP,
479 DK_FILE,
480 DK_LINE,
481 DK_LOC,
482 DK_STABS,
483 DK_CV_FILE,
484 DK_CV_FUNC_ID,
485 DK_CV_INLINE_SITE_ID,
486 DK_CV_LOC,
487 DK_CV_LINETABLE,
488 DK_CV_INLINE_LINETABLE,
489 DK_CV_DEF_RANGE,
490 DK_CV_STRINGTABLE,
491 DK_CV_STRING,
492 DK_CV_FILECHECKSUMS,
493 DK_CV_FILECHECKSUM_OFFSET,
494 DK_CV_FPO_DATA,
495 DK_CFI_SECTIONS,
496 DK_CFI_STARTPROC,
497 DK_CFI_ENDPROC,
498 DK_CFI_DEF_CFA,
499 DK_CFI_DEF_CFA_OFFSET,
500 DK_CFI_ADJUST_CFA_OFFSET,
501 DK_CFI_DEF_CFA_REGISTER,
502 DK_CFI_LLVM_DEF_ASPACE_CFA,
503 DK_CFI_OFFSET,
504 DK_CFI_REL_OFFSET,
505 DK_CFI_PERSONALITY,
506 DK_CFI_LSDA,
507 DK_CFI_REMEMBER_STATE,
508 DK_CFI_RESTORE_STATE,
509 DK_CFI_SAME_VALUE,
510 DK_CFI_RESTORE,
511 DK_CFI_ESCAPE,
512 DK_CFI_RETURN_COLUMN,
513 DK_CFI_SIGNAL_FRAME,
514 DK_CFI_UNDEFINED,
515 DK_CFI_REGISTER,
516 DK_CFI_WINDOW_SAVE,
517 DK_CFI_B_KEY_FRAME,
518 DK_MACROS_ON,
519 DK_MACROS_OFF,
520 DK_ALTMACRO,
521 DK_NOALTMACRO,
522 DK_MACRO,
523 DK_EXITM,
524 DK_ENDM,
525 DK_ENDMACRO,
526 DK_PURGEM,
527 DK_SLEB128,
528 DK_ULEB128,
529 DK_ERR,
530 DK_ERROR,
531 DK_WARNING,
532 DK_PRINT,
533 DK_ADDRSIG,
534 DK_ADDRSIG_SYM,
535 DK_PSEUDO_PROBE,
536 DK_LTO_DISCARD,
537 DK_END
538 };
539
540 /// Maps directive name --> DirectiveKind enum, for
541 /// directives parsed by this class.
542 StringMap<DirectiveKind> DirectiveKindMap;
543
544 // Codeview def_range type parsing.
545 enum CVDefRangeType {
546 CVDR_DEFRANGE = 0, // Placeholder
547 CVDR_DEFRANGE_REGISTER,
548 CVDR_DEFRANGE_FRAMEPOINTER_REL,
549 CVDR_DEFRANGE_SUBFIELD_REGISTER,
550 CVDR_DEFRANGE_REGISTER_REL
551 };
552
553 /// Maps Codeview def_range types --> CVDefRangeType enum, for
554 /// Codeview def_range types parsed by this class.
555 StringMap<CVDefRangeType> CVDefRangeTypeMap;
556
557 // ".ascii", ".asciz", ".string"
558 bool parseDirectiveAscii(StringRef IDVal, bool ZeroTerminated);
559 bool parseDirectiveReloc(SMLoc DirectiveLoc); // ".reloc"
560 bool parseDirectiveValue(StringRef IDVal,
561 unsigned Size); // ".byte", ".long", ...
562 bool parseDirectiveOctaValue(StringRef IDVal); // ".octa", ...
563 bool parseDirectiveRealValue(StringRef IDVal,
564 const fltSemantics &); // ".single", ...
565 bool parseDirectiveFill(); // ".fill"
566 bool parseDirectiveZero(); // ".zero"
567 // ".set", ".equ", ".equiv"
568 bool parseDirectiveSet(StringRef IDVal, bool allow_redef);
569 bool parseDirectiveOrg(); // ".org"
570 // ".align{,32}", ".p2align{,w,l}"
571 bool parseDirectiveAlign(bool IsPow2, unsigned ValueSize);
572
573 // ".file", ".line", ".loc", ".stabs"
574 bool parseDirectiveFile(SMLoc DirectiveLoc);
575 bool parseDirectiveLine();
576 bool parseDirectiveLoc();
577 bool parseDirectiveStabs();
578
579 // ".cv_file", ".cv_func_id", ".cv_inline_site_id", ".cv_loc", ".cv_linetable",
580 // ".cv_inline_linetable", ".cv_def_range", ".cv_string"
581 bool parseDirectiveCVFile();
582 bool parseDirectiveCVFuncId();
583 bool parseDirectiveCVInlineSiteId();
584 bool parseDirectiveCVLoc();
585 bool parseDirectiveCVLinetable();
586 bool parseDirectiveCVInlineLinetable();
587 bool parseDirectiveCVDefRange();
588 bool parseDirectiveCVString();
589 bool parseDirectiveCVStringTable();
590 bool parseDirectiveCVFileChecksums();
591 bool parseDirectiveCVFileChecksumOffset();
592 bool parseDirectiveCVFPOData();
593
594 // .cfi directives
595 bool parseDirectiveCFIRegister(SMLoc DirectiveLoc);
596 bool parseDirectiveCFIWindowSave();
597 bool parseDirectiveCFISections();
598 bool parseDirectiveCFIStartProc();
599 bool parseDirectiveCFIEndProc();
600 bool parseDirectiveCFIDefCfaOffset();
601 bool parseDirectiveCFIDefCfa(SMLoc DirectiveLoc);
602 bool parseDirectiveCFIAdjustCfaOffset();
603 bool parseDirectiveCFIDefCfaRegister(SMLoc DirectiveLoc);
604 bool parseDirectiveCFILLVMDefAspaceCfa(SMLoc DirectiveLoc);
605 bool parseDirectiveCFIOffset(SMLoc DirectiveLoc);
606 bool parseDirectiveCFIRelOffset(SMLoc DirectiveLoc);
607 bool parseDirectiveCFIPersonalityOrLsda(bool IsPersonality);
608 bool parseDirectiveCFIRememberState();
609 bool parseDirectiveCFIRestoreState();
610 bool parseDirectiveCFISameValue(SMLoc DirectiveLoc);
611 bool parseDirectiveCFIRestore(SMLoc DirectiveLoc);
612 bool parseDirectiveCFIEscape();
613 bool parseDirectiveCFIReturnColumn(SMLoc DirectiveLoc);
614 bool parseDirectiveCFISignalFrame();
615 bool parseDirectiveCFIUndefined(SMLoc DirectiveLoc);
616
617 // macro directives
618 bool parseDirectivePurgeMacro(SMLoc DirectiveLoc);
619 bool parseDirectiveExitMacro(StringRef Directive);
620 bool parseDirectiveEndMacro(StringRef Directive);
621 bool parseDirectiveMacro(SMLoc DirectiveLoc);
622 bool parseDirectiveMacrosOnOff(StringRef Directive);
623 // alternate macro mode directives
624 bool parseDirectiveAltmacro(StringRef Directive);
625 // ".bundle_align_mode"
626 bool parseDirectiveBundleAlignMode();
627 // ".bundle_lock"
628 bool parseDirectiveBundleLock();
629 // ".bundle_unlock"
630 bool parseDirectiveBundleUnlock();
631
632 // ".space", ".skip"
633 bool parseDirectiveSpace(StringRef IDVal);
634
635 // ".dcb"
636 bool parseDirectiveDCB(StringRef IDVal, unsigned Size);
637 bool parseDirectiveRealDCB(StringRef IDVal, const fltSemantics &);
638 // ".ds"
639 bool parseDirectiveDS(StringRef IDVal, unsigned Size);
640
641 // .sleb128 (Signed=true) and .uleb128 (Signed=false)
642 bool parseDirectiveLEB128(bool Signed);
643
644 /// Parse a directive like ".globl" which
645 /// accepts a single symbol (which should be a label or an external).
646 bool parseDirectiveSymbolAttribute(MCSymbolAttr Attr);
647
648 bool parseDirectiveComm(bool IsLocal); // ".comm" and ".lcomm"
649
650 bool parseDirectiveAbort(); // ".abort"
651 bool parseDirectiveInclude(); // ".include"
652 bool parseDirectiveIncbin(); // ".incbin"
653
654 // ".if", ".ifeq", ".ifge", ".ifgt" , ".ifle", ".iflt" or ".ifne"
655 bool parseDirectiveIf(SMLoc DirectiveLoc, DirectiveKind DirKind);
656 // ".ifb" or ".ifnb", depending on ExpectBlank.
657 bool parseDirectiveIfb(SMLoc DirectiveLoc, bool ExpectBlank);
658 // ".ifc" or ".ifnc", depending on ExpectEqual.
659 bool parseDirectiveIfc(SMLoc DirectiveLoc, bool ExpectEqual);
660 // ".ifeqs" or ".ifnes", depending on ExpectEqual.
661 bool parseDirectiveIfeqs(SMLoc DirectiveLoc, bool ExpectEqual);
662 // ".ifdef" or ".ifndef", depending on expect_defined
663 bool parseDirectiveIfdef(SMLoc DirectiveLoc, bool expect_defined);
664 bool parseDirectiveElseIf(SMLoc DirectiveLoc); // ".elseif"
665 bool parseDirectiveElse(SMLoc DirectiveLoc); // ".else"
666 bool parseDirectiveEndIf(SMLoc DirectiveLoc); // .endif
667 bool parseEscapedString(std::string &Data) override;
668 bool parseAngleBracketString(std::string &Data) override;
669
670 const MCExpr *applyModifierToExpr(const MCExpr *E,
671 MCSymbolRefExpr::VariantKind Variant);
672
673 // Macro-like directives
674 MCAsmMacro *parseMacroLikeBody(SMLoc DirectiveLoc);
675 void instantiateMacroLikeBody(MCAsmMacro *M, SMLoc DirectiveLoc,
676 raw_svector_ostream &OS);
677 bool parseDirectiveRept(SMLoc DirectiveLoc, StringRef Directive);
678 bool parseDirectiveIrp(SMLoc DirectiveLoc); // ".irp"
679 bool parseDirectiveIrpc(SMLoc DirectiveLoc); // ".irpc"
680 bool parseDirectiveEndr(SMLoc DirectiveLoc); // ".endr"
681
682 // "_emit" or "__emit"
683 bool parseDirectiveMSEmit(SMLoc DirectiveLoc, ParseStatementInfo &Info,
684 size_t Len);
685
686 // "align"
687 bool parseDirectiveMSAlign(SMLoc DirectiveLoc, ParseStatementInfo &Info);
688
689 // "end"
690 bool parseDirectiveEnd(SMLoc DirectiveLoc);
691
692 // ".err" or ".error"
693 bool parseDirectiveError(SMLoc DirectiveLoc, bool WithMessage);
694
695 // ".warning"
696 bool parseDirectiveWarning(SMLoc DirectiveLoc);
697
698 // .print <double-quotes-string>
699 bool parseDirectivePrint(SMLoc DirectiveLoc);
700
701 // .pseudoprobe
702 bool parseDirectivePseudoProbe();
703
704 // ".lto_discard"
705 bool parseDirectiveLTODiscard();
706
707 // Directives to support address-significance tables.
708 bool parseDirectiveAddrsig();
709 bool parseDirectiveAddrsigSym();
710
711 void initializeDirectiveKindMap();
712 void initializeCVDefRangeTypeMap();
713};
714
715class HLASMAsmParser final : public AsmParser {
716private:
717 MCAsmLexer &Lexer;
718 MCStreamer &Out;
719
720 void lexLeadingSpaces() {
721 while (Lexer.is(AsmToken::Space))
722 Lexer.Lex();
723 }
724
725 bool parseAsHLASMLabel(ParseStatementInfo &Info, MCAsmParserSemaCallback *SI);
726 bool parseAsMachineInstruction(ParseStatementInfo &Info,
727 MCAsmParserSemaCallback *SI);
728
729public:
730 HLASMAsmParser(SourceMgr &SM, MCContext &Ctx, MCStreamer &Out,
731 const MCAsmInfo &MAI, unsigned CB = 0)
732 : AsmParser(SM, Ctx, Out, MAI, CB), Lexer(getLexer()), Out(Out) {
733 Lexer.setSkipSpace(false);
734 Lexer.setAllowHashInIdentifier(true);
735 Lexer.setLexHLASMIntegers(true);
736 Lexer.setLexHLASMStrings(true);
737 }
738
739 ~HLASMAsmParser() { Lexer.setSkipSpace(true); }
740
741 bool parseStatement(ParseStatementInfo &Info,
742 MCAsmParserSemaCallback *SI) override;
743};
744
745} // end anonymous namespace
746
747namespace llvm {
748
749extern MCAsmParserExtension *createDarwinAsmParser();
750extern MCAsmParserExtension *createELFAsmParser();
751extern MCAsmParserExtension *createCOFFAsmParser();
752extern MCAsmParserExtension *createXCOFFAsmParser();
753extern MCAsmParserExtension *createWasmAsmParser();
754
755} // end namespace llvm
756
757enum { DEFAULT_ADDRSPACE = 0 };
758
759AsmParser::AsmParser(SourceMgr &SM, MCContext &Ctx, MCStreamer &Out,
760 const MCAsmInfo &MAI, unsigned CB = 0)
761 : Lexer(MAI), Ctx(Ctx), Out(Out), MAI(MAI), SrcMgr(SM),
762 CurBuffer(CB ? CB : SM.getMainFileID()), MacrosEnabledFlag(true) {
763 HadError = false;
764 // Save the old handler.
765 SavedDiagHandler = SrcMgr.getDiagHandler();
766 SavedDiagContext = SrcMgr.getDiagContext();
767 // Set our own handler which calls the saved handler.
768 SrcMgr.setDiagHandler(DiagHandler, this);
769 Lexer.setBuffer(SrcMgr.getMemoryBuffer(CurBuffer)->getBuffer());
770 // Make MCStreamer aware of the StartTokLoc for locations in diagnostics.
771 Out.setStartTokLocPtr(&StartTokLoc);
772
773 // Initialize the platform / file format parser.
774 switch (Ctx.getObjectFileType()) {
775 case MCContext::IsCOFF:
776 PlatformParser.reset(createCOFFAsmParser());
777 break;
778 case MCContext::IsMachO:
779 PlatformParser.reset(createDarwinAsmParser());
780 IsDarwin = true;
781 break;
782 case MCContext::IsELF:
783 PlatformParser.reset(createELFAsmParser());
784 break;
785 case MCContext::IsGOFF:
786 report_fatal_error("GOFFAsmParser support not implemented yet");
787 case MCContext::IsWasm:
788 PlatformParser.reset(createWasmAsmParser());
789 break;
790 case MCContext::IsXCOFF:
791 PlatformParser.reset(createXCOFFAsmParser());
792 break;
793 }
794
795 PlatformParser->Initialize(*this);
796 initializeDirectiveKindMap();
797 initializeCVDefRangeTypeMap();
798
799 NumOfMacroInstantiations = 0;
800}
801
802AsmParser::~AsmParser() {
803 assert((HadError || ActiveMacros.empty()) &&(static_cast<void> (0))
804 "Unexpected active macro instantiation!")(static_cast<void> (0));
805
806 // Remove MCStreamer's reference to the parser SMLoc.
807 Out.setStartTokLocPtr(nullptr);
808 // Restore the saved diagnostics handler and context for use during
809 // finalization.
810 SrcMgr.setDiagHandler(SavedDiagHandler, SavedDiagContext);
811}
812
813void AsmParser::printMacroInstantiations() {
814 // Print the active macro instantiation stack.
815 for (std::vector<MacroInstantiation *>::const_reverse_iterator
816 it = ActiveMacros.rbegin(),
817 ie = ActiveMacros.rend();
818 it != ie; ++it)
819 printMessage((*it)->InstantiationLoc, SourceMgr::DK_Note,
820 "while in macro instantiation");
821}
822
823void AsmParser::Note(SMLoc L, const Twine &Msg, SMRange Range) {
824 printPendingErrors();
825 printMessage(L, SourceMgr::DK_Note, Msg, Range);
826 printMacroInstantiations();
827}
828
829bool AsmParser::Warning(SMLoc L, const Twine &Msg, SMRange Range) {
830 if(getTargetParser().getTargetOptions().MCNoWarn)
831 return false;
832 if (getTargetParser().getTargetOptions().MCFatalWarnings)
833 return Error(L, Msg, Range);
834 printMessage(L, SourceMgr::DK_Warning, Msg, Range);
835 printMacroInstantiations();
836 return false;
837}
838
839bool AsmParser::printError(SMLoc L, const Twine &Msg, SMRange Range) {
840 HadError = true;
841 printMessage(L, SourceMgr::DK_Error, Msg, Range);
842 printMacroInstantiations();
843 return true;
844}
845
846bool AsmParser::enterIncludeFile(const std::string &Filename) {
847 std::string IncludedFile;
848 unsigned NewBuf =
849 SrcMgr.AddIncludeFile(Filename, Lexer.getLoc(), IncludedFile);
850 if (!NewBuf)
851 return true;
852
853 CurBuffer = NewBuf;
854 Lexer.setBuffer(SrcMgr.getMemoryBuffer(CurBuffer)->getBuffer());
855 return false;
856}
857
858/// Process the specified .incbin file by searching for it in the include paths
859/// then just emitting the byte contents of the file to the streamer. This
860/// returns true on failure.
861bool AsmParser::processIncbinFile(const std::string &Filename, int64_t Skip,
862 const MCExpr *Count, SMLoc Loc) {
863 std::string IncludedFile;
864 unsigned NewBuf =
865 SrcMgr.AddIncludeFile(Filename, Lexer.getLoc(), IncludedFile);
866 if (!NewBuf)
867 return true;
868
869 // Pick up the bytes from the file and emit them.
870 StringRef Bytes = SrcMgr.getMemoryBuffer(NewBuf)->getBuffer();
871 Bytes = Bytes.drop_front(Skip);
872 if (Count) {
873 int64_t Res;
874 if (!Count->evaluateAsAbsolute(Res, getStreamer().getAssemblerPtr()))
875 return Error(Loc, "expected absolute expression");
876 if (Res < 0)
877 return Warning(Loc, "negative count has no effect");
878 Bytes = Bytes.take_front(Res);
879 }
880 getStreamer().emitBytes(Bytes);
881 return false;
882}
883
884void AsmParser::jumpToLoc(SMLoc Loc, unsigned InBuffer) {
885 CurBuffer = InBuffer ? InBuffer : SrcMgr.FindBufferContainingLoc(Loc);
886 Lexer.setBuffer(SrcMgr.getMemoryBuffer(CurBuffer)->getBuffer(),
887 Loc.getPointer());
888}
889
890const AsmToken &AsmParser::Lex() {
891 if (Lexer.getTok().is(AsmToken::Error))
892 Error(Lexer.getErrLoc(), Lexer.getErr());
893
894 // if it's a end of statement with a comment in it
895 if (getTok().is(AsmToken::EndOfStatement)) {
896 // if this is a line comment output it.
897 if (!getTok().getString().empty() && getTok().getString().front() != '\n' &&
898 getTok().getString().front() != '\r' && MAI.preserveAsmComments())
899 Out.addExplicitComment(Twine(getTok().getString()));
900 }
901
902 const AsmToken *tok = &Lexer.Lex();
903
904 // Parse comments here to be deferred until end of next statement.
905 while (tok->is(AsmToken::Comment)) {
906 if (MAI.preserveAsmComments())
907 Out.addExplicitComment(Twine(tok->getString()));
908 tok = &Lexer.Lex();
909 }
910
911 if (tok->is(AsmToken::Eof)) {
912 // If this is the end of an included file, pop the parent file off the
913 // include stack.
914 SMLoc ParentIncludeLoc = SrcMgr.getParentIncludeLoc(CurBuffer);
915 if (ParentIncludeLoc != SMLoc()) {
916 jumpToLoc(ParentIncludeLoc);
917 return Lex();
918 }
919 }
920
921 return *tok;
922}
923
924bool AsmParser::enabledGenDwarfForAssembly() {
925 // Check whether the user specified -g.
926 if (!getContext().getGenDwarfForAssembly())
927 return false;
928 // If we haven't encountered any .file directives (which would imply that
929 // the assembler source was produced with debug info already) then emit one
930 // describing the assembler source file itself.
931 if (getContext().getGenDwarfFileNumber() == 0) {
932 // Use the first #line directive for this, if any. It's preprocessed, so
933 // there is no checksum, and of course no source directive.
934 if (!FirstCppHashFilename.empty())
935 getContext().setMCLineTableRootFile(/*CUID=*/0,
936 getContext().getCompilationDir(),
937 FirstCppHashFilename,
938 /*Cksum=*/None, /*Source=*/None);
939 const MCDwarfFile &RootFile =
940 getContext().getMCDwarfLineTable(/*CUID=*/0).getRootFile();
941 getContext().setGenDwarfFileNumber(getStreamer().emitDwarfFileDirective(
942 /*CUID=*/0, getContext().getCompilationDir(), RootFile.Name,
943 RootFile.Checksum, RootFile.Source));
944 }
945 return true;
946}
947
948bool AsmParser::Run(bool NoInitialTextSection, bool NoFinalize) {
949 LTODiscardSymbols.clear();
950
951 // Create the initial section, if requested.
952 if (!NoInitialTextSection)
953 Out.InitSections(false);
954
955 // Prime the lexer.
956 Lex();
957
958 HadError = false;
959 AsmCond StartingCondState = TheCondState;
960 SmallVector<AsmRewrite, 4> AsmStrRewrites;
961
962 // If we are generating dwarf for assembly source files save the initial text
963 // section. (Don't use enabledGenDwarfForAssembly() here, as we aren't
964 // emitting any actual debug info yet and haven't had a chance to parse any
965 // embedded .file directives.)
966 if (getContext().getGenDwarfForAssembly()) {
967 MCSection *Sec = getStreamer().getCurrentSectionOnly();
968 if (!Sec->getBeginSymbol()) {
969 MCSymbol *SectionStartSym = getContext().createTempSymbol();
970 getStreamer().emitLabel(SectionStartSym);
971 Sec->setBeginSymbol(SectionStartSym);
972 }
973 bool InsertResult = getContext().addGenDwarfSection(Sec);
974 assert(InsertResult && ".text section should not have debug info yet")(static_cast<void> (0));
975 (void)InsertResult;
976 }
977
978 getTargetParser().onBeginOfFile();
979
980 // While we have input, parse each statement.
981 while (Lexer.isNot(AsmToken::Eof)) {
982 ParseStatementInfo Info(&AsmStrRewrites);
983 bool Parsed = parseStatement(Info, nullptr);
984
985 // If we have a Lexer Error we are on an Error Token. Load in Lexer Error
986 // for printing ErrMsg via Lex() only if no (presumably better) parser error
987 // exists.
988 if (Parsed && !hasPendingError() && Lexer.getTok().is(AsmToken::Error)) {
989 Lex();
990 }
991
992 // parseStatement returned true so may need to emit an error.
993 printPendingErrors();
994
995 // Skipping to the next line if needed.
996 if (Parsed && !getLexer().isAtStartOfStatement())
997 eatToEndOfStatement();
998 }
999
1000 getTargetParser().onEndOfFile();
1001 printPendingErrors();
1002
1003 // All errors should have been emitted.
1004 assert(!hasPendingError() && "unexpected error from parseStatement")(static_cast<void> (0));
1005
1006 getTargetParser().flushPendingInstructions(getStreamer());
1007
1008 if (TheCondState.TheCond != StartingCondState.TheCond ||
1009 TheCondState.Ignore != StartingCondState.Ignore)
1010 printError(getTok().getLoc(), "unmatched .ifs or .elses");
1011 // Check to see there are no empty DwarfFile slots.
1012 const auto &LineTables = getContext().getMCDwarfLineTables();
1013 if (!LineTables.empty()) {
1014 unsigned Index = 0;
1015 for (const auto &File : LineTables.begin()->second.getMCDwarfFiles()) {
1016 if (File.Name.empty() && Index != 0)
1017 printError(getTok().getLoc(), "unassigned file number: " +
1018 Twine(Index) +
1019 " for .file directives");
1020 ++Index;
1021 }
1022 }
1023
1024 // Check to see that all assembler local symbols were actually defined.
1025 // Targets that don't do subsections via symbols may not want this, though,
1026 // so conservatively exclude them. Only do this if we're finalizing, though,
1027 // as otherwise we won't necessarilly have seen everything yet.
1028 if (!NoFinalize) {
1029 if (MAI.hasSubsectionsViaSymbols()) {
1030 for (const auto &TableEntry : getContext().getSymbols()) {
1031 MCSymbol *Sym = TableEntry.getValue();
1032 // Variable symbols may not be marked as defined, so check those
1033 // explicitly. If we know it's a variable, we have a definition for
1034 // the purposes of this check.
1035 if (Sym->isTemporary() && !Sym->isVariable() && !Sym->isDefined())
1036 // FIXME: We would really like to refer back to where the symbol was
1037 // first referenced for a source location. We need to add something
1038 // to track that. Currently, we just point to the end of the file.
1039 printError(getTok().getLoc(), "assembler local symbol '" +
1040 Sym->getName() + "' not defined");
1041 }
1042 }
1043
1044 // Temporary symbols like the ones for directional jumps don't go in the
1045 // symbol table. They also need to be diagnosed in all (final) cases.
1046 for (std::tuple<SMLoc, CppHashInfoTy, MCSymbol *> &LocSym : DirLabels) {
1047 if (std::get<2>(LocSym)->isUndefined()) {
1048 // Reset the state of any "# line file" directives we've seen to the
1049 // context as it was at the diagnostic site.
1050 CppHashInfo = std::get<1>(LocSym);
1051 printError(std::get<0>(LocSym), "directional label undefined");
1052 }
1053 }
1054 }
1055 // Finalize the output stream if there are no errors and if the client wants
1056 // us to.
1057 if (!HadError && !NoFinalize) {
1058 if (auto *TS = Out.getTargetStreamer())
1059 TS->emitConstantPools();
1060
1061 Out.Finish(Lexer.getLoc());
1062 }
1063
1064 return HadError || getContext().hadError();
1065}
1066
1067bool AsmParser::checkForValidSection() {
1068 if (!ParsingMSInlineAsm && !getStreamer().getCurrentSectionOnly()) {
1069 Out.InitSections(false);
1070 return Error(getTok().getLoc(),
1071 "expected section directive before assembly directive");
1072 }
1073 return false;
1074}
1075
1076/// Throw away the rest of the line for testing purposes.
1077void AsmParser::eatToEndOfStatement() {
1078 while (Lexer.isNot(AsmToken::EndOfStatement) && Lexer.isNot(AsmToken::Eof))
1079 Lexer.Lex();
1080
1081 // Eat EOL.
1082 if (Lexer.is(AsmToken::EndOfStatement))
1083 Lexer.Lex();
1084}
1085
1086StringRef AsmParser::parseStringToEndOfStatement() {
1087 const char *Start = getTok().getLoc().getPointer();
1088
1089 while (Lexer.isNot(AsmToken::EndOfStatement) && Lexer.isNot(AsmToken::Eof))
1090 Lexer.Lex();
1091
1092 const char *End = getTok().getLoc().getPointer();
1093 return StringRef(Start, End - Start);
1094}
1095
1096StringRef AsmParser::parseStringToComma() {
1097 const char *Start = getTok().getLoc().getPointer();
1098
1099 while (Lexer.isNot(AsmToken::EndOfStatement) &&
1100 Lexer.isNot(AsmToken::Comma) && Lexer.isNot(AsmToken::Eof))
1101 Lexer.Lex();
1102
1103 const char *End = getTok().getLoc().getPointer();
1104 return StringRef(Start, End - Start);
1105}
1106
1107/// Parse a paren expression and return it.
1108/// NOTE: This assumes the leading '(' has already been consumed.
1109///
1110/// parenexpr ::= expr)
1111///
1112bool AsmParser::parseParenExpr(const MCExpr *&Res, SMLoc &EndLoc) {
1113 if (parseExpression(Res))
1114 return true;
1115 if (Lexer.isNot(AsmToken::RParen))
1116 return TokError("expected ')' in parentheses expression");
1117 EndLoc = Lexer.getTok().getEndLoc();
1118 Lex();
1119 return false;
1120}
1121
1122/// Parse a bracket expression and return it.
1123/// NOTE: This assumes the leading '[' has already been consumed.
1124///
1125/// bracketexpr ::= expr]
1126///
1127bool AsmParser::parseBracketExpr(const MCExpr *&Res, SMLoc &EndLoc) {
1128 if (parseExpression(Res))
1129 return true;
1130 EndLoc = getTok().getEndLoc();
1131 if (parseToken(AsmToken::RBrac, "expected ']' in brackets expression"))
1132 return true;
1133 return false;
1134}
1135
1136/// Parse a primary expression and return it.
1137/// primaryexpr ::= (parenexpr
1138/// primaryexpr ::= symbol
1139/// primaryexpr ::= number
1140/// primaryexpr ::= '.'
1141/// primaryexpr ::= ~,+,- primaryexpr
1142bool AsmParser::parsePrimaryExpr(const MCExpr *&Res, SMLoc &EndLoc,
1143 AsmTypeInfo *TypeInfo) {
1144 SMLoc FirstTokenLoc = getLexer().getLoc();
1145 AsmToken::TokenKind FirstTokenKind = Lexer.getKind();
1146 switch (FirstTokenKind) {
1147 default:
1148 return TokError("unknown token in expression");
1149 // If we have an error assume that we've already handled it.
1150 case AsmToken::Error:
1151 return true;
1152 case AsmToken::Exclaim:
1153 Lex(); // Eat the operator.
1154 if (parsePrimaryExpr(Res, EndLoc, TypeInfo))
1155 return true;
1156 Res = MCUnaryExpr::createLNot(Res, getContext(), FirstTokenLoc);
1157 return false;
1158 case AsmToken::Dollar:
1159 case AsmToken::Star:
1160 case AsmToken::At:
1161 case AsmToken::String:
1162 case AsmToken::Identifier: {
1163 StringRef Identifier;
1164 if (parseIdentifier(Identifier)) {
1165 // We may have failed but '$'|'*' may be a valid token in context of
1166 // the current PC.
1167 if (getTok().is(AsmToken::Dollar) || getTok().is(AsmToken::Star)) {
1168 bool ShouldGenerateTempSymbol = false;
1169 if ((getTok().is(AsmToken::Dollar) && MAI.getDollarIsPC()) ||
1170 (getTok().is(AsmToken::Star) && MAI.getStarIsPC()))
1171 ShouldGenerateTempSymbol = true;
1172
1173 if (!ShouldGenerateTempSymbol)
1174 return Error(FirstTokenLoc, "invalid token in expression");
1175
1176 // Eat the '$'|'*' token.
1177 Lex();
1178 // This is either a '$'|'*' reference, which references the current PC.
1179 // Emit a temporary label to the streamer and refer to it.
1180 MCSymbol *Sym = Ctx.createTempSymbol();
1181 Out.emitLabel(Sym);
1182 Res = MCSymbolRefExpr::create(Sym, MCSymbolRefExpr::VK_None,
1183 getContext());
1184 EndLoc = FirstTokenLoc;
1185 return false;
1186 }
1187 }
1188 // Parse symbol variant
1189 std::pair<StringRef, StringRef> Split;
1190 if (!MAI.useParensForSymbolVariant()) {
1191 if (FirstTokenKind == AsmToken::String) {
1192 if (Lexer.is(AsmToken::At)) {
1193 Lex(); // eat @
1194 SMLoc AtLoc = getLexer().getLoc();
1195 StringRef VName;
1196 if (parseIdentifier(VName))
1197 return Error(AtLoc, "expected symbol variant after '@'");
1198
1199 Split = std::make_pair(Identifier, VName);
1200 }
1201 } else {
1202 Split = Identifier.split('@');
1203 }
1204 } else if (Lexer.is(AsmToken::LParen)) {
1205 Lex(); // eat '('.
1206 StringRef VName;
1207 parseIdentifier(VName);
1208 // eat ')'.
1209 if (parseToken(AsmToken::RParen,
1210 "unexpected token in variant, expected ')'"))
1211 return true;
1212 Split = std::make_pair(Identifier, VName);
1213 }
1214
1215 EndLoc = SMLoc::getFromPointer(Identifier.end());
1216
1217 // This is a symbol reference.
1218 StringRef SymbolName = Identifier;
1219 if (SymbolName.empty())
1220 return Error(getLexer().getLoc(), "expected a symbol reference");
1221
1222 MCSymbolRefExpr::VariantKind Variant = MCSymbolRefExpr::VK_None;
1223
1224 // Lookup the symbol variant if used.
1225 if (!Split.second.empty()) {
1226 Variant = MCSymbolRefExpr::getVariantKindForName(Split.second);
1227 if (Variant != MCSymbolRefExpr::VK_Invalid) {
1228 SymbolName = Split.first;
1229 } else if (MAI.doesAllowAtInName() && !MAI.useParensForSymbolVariant()) {
1230 Variant = MCSymbolRefExpr::VK_None;
1231 } else {
1232 return Error(SMLoc::getFromPointer(Split.second.begin()),
1233 "invalid variant '" + Split.second + "'");
1234 }
1235 }
1236
1237 MCSymbol *Sym = getContext().getInlineAsmLabel(SymbolName);
1238 if (!Sym)
1239 Sym = getContext().getOrCreateSymbol(
1240 MAI.shouldEmitLabelsInUpperCase() ? SymbolName.upper() : SymbolName);
1241
1242 // If this is an absolute variable reference, substitute it now to preserve
1243 // semantics in the face of reassignment.
1244 if (Sym->isVariable()) {
1245 auto V = Sym->getVariableValue(/*SetUsed*/ false);
1246 bool DoInline = isa<MCConstantExpr>(V) && !Variant;
1247 if (auto TV = dyn_cast<MCTargetExpr>(V))
1248 DoInline = TV->inlineAssignedExpr();
1249 if (DoInline) {
1250 if (Variant)
1251 return Error(EndLoc, "unexpected modifier on variable reference");
1252 Res = Sym->getVariableValue(/*SetUsed*/ false);
1253 return false;
1254 }
1255 }
1256
1257 // Otherwise create a symbol ref.
1258 Res = MCSymbolRefExpr::create(Sym, Variant, getContext(), FirstTokenLoc);
1259 return false;
1260 }
1261 case AsmToken::BigNum:
1262 return TokError("literal value out of range for directive");
1263 case AsmToken::Integer: {
1264 SMLoc Loc = getTok().getLoc();
1265 int64_t IntVal = getTok().getIntVal();
1266 Res = MCConstantExpr::create(IntVal, getContext());
1267 EndLoc = Lexer.getTok().getEndLoc();
1268 Lex(); // Eat token.
1269 // Look for 'b' or 'f' following an Integer as a directional label
1270 if (Lexer.getKind() == AsmToken::Identifier) {
1271 StringRef IDVal = getTok().getString();
1272 // Lookup the symbol variant if used.
1273 std::pair<StringRef, StringRef> Split = IDVal.split('@');
1274 MCSymbolRefExpr::VariantKind Variant = MCSymbolRefExpr::VK_None;
1275 if (Split.first.size() != IDVal.size()) {
1276 Variant = MCSymbolRefExpr::getVariantKindForName(Split.second);
1277 if (Variant == MCSymbolRefExpr::VK_Invalid)
1278 return TokError("invalid variant '" + Split.second + "'");
1279 IDVal = Split.first;
1280 }
1281 if (IDVal == "f" || IDVal == "b") {
1282 MCSymbol *Sym =
1283 Ctx.getDirectionalLocalSymbol(IntVal, IDVal == "b");
1284 Res = MCSymbolRefExpr::create(Sym, Variant, getContext());
1285 if (IDVal == "b" && Sym->isUndefined())
1286 return Error(Loc, "directional label undefined");
1287 DirLabels.push_back(std::make_tuple(Loc, CppHashInfo, Sym));
1288 EndLoc = Lexer.getTok().getEndLoc();
1289 Lex(); // Eat identifier.
1290 }
1291 }
1292 return false;
1293 }
1294 case AsmToken::Real: {
1295 APFloat RealVal(APFloat::IEEEdouble(), getTok().getString());
1296 uint64_t IntVal = RealVal.bitcastToAPInt().getZExtValue();
1297 Res = MCConstantExpr::create(IntVal, getContext());
1298 EndLoc = Lexer.getTok().getEndLoc();
1299 Lex(); // Eat token.
1300 return false;
1301 }
1302 case AsmToken::Dot: {
1303 if (!MAI.getDotIsPC())
1304 return TokError("cannot use . as current PC");
1305
1306 // This is a '.' reference, which references the current PC. Emit a
1307 // temporary label to the streamer and refer to it.
1308 MCSymbol *Sym = Ctx.createTempSymbol();
1309 Out.emitLabel(Sym);
1310 Res = MCSymbolRefExpr::create(Sym, MCSymbolRefExpr::VK_None, getContext());
1311 EndLoc = Lexer.getTok().getEndLoc();
1312 Lex(); // Eat identifier.
1313 return false;
1314 }
1315 case AsmToken::LParen:
1316 Lex(); // Eat the '('.
1317 return parseParenExpr(Res, EndLoc);
1318 case AsmToken::LBrac:
1319 if (!PlatformParser->HasBracketExpressions())
1320 return TokError("brackets expression not supported on this target");
1321 Lex(); // Eat the '['.
1322 return parseBracketExpr(Res, EndLoc);
1323 case AsmToken::Minus:
1324 Lex(); // Eat the operator.
1325 if (parsePrimaryExpr(Res, EndLoc, TypeInfo))
1326 return true;
1327 Res = MCUnaryExpr::createMinus(Res, getContext(), FirstTokenLoc);
1328 return false;
1329 case AsmToken::Plus:
1330 Lex(); // Eat the operator.
1331 if (parsePrimaryExpr(Res, EndLoc, TypeInfo))
1332 return true;
1333 Res = MCUnaryExpr::createPlus(Res, getContext(), FirstTokenLoc);
1334 return false;
1335 case AsmToken::Tilde:
1336 Lex(); // Eat the operator.
1337 if (parsePrimaryExpr(Res, EndLoc, TypeInfo))
1338 return true;
1339 Res = MCUnaryExpr::createNot(Res, getContext(), FirstTokenLoc);
1340 return false;
1341 // MIPS unary expression operators. The lexer won't generate these tokens if
1342 // MCAsmInfo::HasMipsExpressions is false for the target.
1343 case AsmToken::PercentCall16:
1344 case AsmToken::PercentCall_Hi:
1345 case AsmToken::PercentCall_Lo:
1346 case AsmToken::PercentDtprel_Hi:
1347 case AsmToken::PercentDtprel_Lo:
1348 case AsmToken::PercentGot:
1349 case AsmToken::PercentGot_Disp:
1350 case AsmToken::PercentGot_Hi:
1351 case AsmToken::PercentGot_Lo:
1352 case AsmToken::PercentGot_Ofst:
1353 case AsmToken::PercentGot_Page:
1354 case AsmToken::PercentGottprel:
1355 case AsmToken::PercentGp_Rel:
1356 case AsmToken::PercentHi:
1357 case AsmToken::PercentHigher:
1358 case AsmToken::PercentHighest:
1359 case AsmToken::PercentLo:
1360 case AsmToken::PercentNeg:
1361 case AsmToken::PercentPcrel_Hi:
1362 case AsmToken::PercentPcrel_Lo:
1363 case AsmToken::PercentTlsgd:
1364 case AsmToken::PercentTlsldm:
1365 case AsmToken::PercentTprel_Hi:
1366 case AsmToken::PercentTprel_Lo:
1367 Lex(); // Eat the operator.
1368 if (Lexer.isNot(AsmToken::LParen))
1369 return TokError("expected '(' after operator");
1370 Lex(); // Eat the operator.
1371 if (parseExpression(Res, EndLoc))
1372 return true;
1373 if (Lexer.isNot(AsmToken::RParen))
1374 return TokError("expected ')'");
1375 Lex(); // Eat the operator.
1376 Res = getTargetParser().createTargetUnaryExpr(Res, FirstTokenKind, Ctx);
1377 return !Res;
1378 }
1379}
1380
1381bool AsmParser::parseExpression(const MCExpr *&Res) {
1382 SMLoc EndLoc;
1383 return parseExpression(Res, EndLoc);
1384}
1385
1386const MCExpr *
1387AsmParser::applyModifierToExpr(const MCExpr *E,
1388 MCSymbolRefExpr::VariantKind Variant) {
1389 // Ask the target implementation about this expression first.
1390 const MCExpr *NewE = getTargetParser().applyModifierToExpr(E, Variant, Ctx);
1391 if (NewE)
1392 return NewE;
1393 // Recurse over the given expression, rebuilding it to apply the given variant
1394 // if there is exactly one symbol.
1395 switch (E->getKind()) {
1396 case MCExpr::Target:
1397 case MCExpr::Constant:
1398 return nullptr;
1399
1400 case MCExpr::SymbolRef: {
1401 const MCSymbolRefExpr *SRE = cast<MCSymbolRefExpr>(E);
1402
1403 if (SRE->getKind() != MCSymbolRefExpr::VK_None) {
1404 TokError("invalid variant on expression '" + getTok().getIdentifier() +
1405 "' (already modified)");
1406 return E;
1407 }
1408
1409 return MCSymbolRefExpr::create(&SRE->getSymbol(), Variant, getContext());
1410 }
1411
1412 case MCExpr::Unary: {
1413 const MCUnaryExpr *UE = cast<MCUnaryExpr>(E);
1414 const MCExpr *Sub = applyModifierToExpr(UE->getSubExpr(), Variant);
1415 if (!Sub)
1416 return nullptr;
1417 return MCUnaryExpr::create(UE->getOpcode(), Sub, getContext());
1418 }
1419
1420 case MCExpr::Binary: {
1421 const MCBinaryExpr *BE = cast<MCBinaryExpr>(E);
1422 const MCExpr *LHS = applyModifierToExpr(BE->getLHS(), Variant);
1423 const MCExpr *RHS = applyModifierToExpr(BE->getRHS(), Variant);
1424
1425 if (!LHS && !RHS)
1426 return nullptr;
1427
1428 if (!LHS)
1429 LHS = BE->getLHS();
1430 if (!RHS)
1431 RHS = BE->getRHS();
1432
1433 return MCBinaryExpr::create(BE->getOpcode(), LHS, RHS, getContext());
1434 }
1435 }
1436
1437 llvm_unreachable("Invalid expression kind!")__builtin_unreachable();
1438}
1439
1440/// This function checks if the next token is <string> type or arithmetic.
1441/// string that begin with character '<' must end with character '>'.
1442/// otherwise it is arithmetics.
1443/// If the function returns a 'true' value,
1444/// the End argument will be filled with the last location pointed to the '>'
1445/// character.
1446
1447/// There is a gap between the AltMacro's documentation and the single quote
1448/// implementation. GCC does not fully support this feature and so we will not
1449/// support it.
1450/// TODO: Adding single quote as a string.
1451static bool isAngleBracketString(SMLoc &StrLoc, SMLoc &EndLoc) {
1452 assert((StrLoc.getPointer() != nullptr) &&(static_cast<void> (0))
1453 "Argument to the function cannot be a NULL value")(static_cast<void> (0));
1454 const char *CharPtr = StrLoc.getPointer();
1455 while ((*CharPtr != '>') && (*CharPtr != '\n') && (*CharPtr != '\r') &&
1456 (*CharPtr != '\0')) {
1457 if (*CharPtr == '!')
1458 CharPtr++;
1459 CharPtr++;
1460 }
1461 if (*CharPtr == '>') {
1462 EndLoc = StrLoc.getFromPointer(CharPtr + 1);
1463 return true;
1464 }
1465 return false;
1466}
1467
1468/// creating a string without the escape characters '!'.
1469static std::string angleBracketString(StringRef AltMacroStr) {
1470 std::string Res;
1471 for (size_t Pos = 0; Pos < AltMacroStr.size(); Pos++) {
1472 if (AltMacroStr[Pos] == '!')
1473 Pos++;
1474 Res += AltMacroStr[Pos];
1475 }
1476 return Res;
1477}
1478
1479/// Parse an expression and return it.
1480///
1481/// expr ::= expr &&,|| expr -> lowest.
1482/// expr ::= expr |,^,&,! expr
1483/// expr ::= expr ==,!=,<>,<,<=,>,>= expr
1484/// expr ::= expr <<,>> expr
1485/// expr ::= expr +,- expr
1486/// expr ::= expr *,/,% expr -> highest.
1487/// expr ::= primaryexpr
1488///
1489bool AsmParser::parseExpression(const MCExpr *&Res, SMLoc &EndLoc) {
1490 // Parse the expression.
1491 Res = nullptr;
1492 if (getTargetParser().parsePrimaryExpr(Res, EndLoc) ||
1493 parseBinOpRHS(1, Res, EndLoc))
1494 return true;
1495
1496 // As a special case, we support 'a op b @ modifier' by rewriting the
1497 // expression to include the modifier. This is inefficient, but in general we
1498 // expect users to use 'a@modifier op b'.
1499 if (Lexer.getKind() == AsmToken::At) {
1500 Lex();
1501
1502 if (Lexer.isNot(AsmToken::Identifier))
1503 return TokError("unexpected symbol modifier following '@'");
1504
1505 MCSymbolRefExpr::VariantKind Variant =
1506 MCSymbolRefExpr::getVariantKindForName(getTok().getIdentifier());
1507 if (Variant == MCSymbolRefExpr::VK_Invalid)
1508 return TokError("invalid variant '" + getTok().getIdentifier() + "'");
1509
1510 const MCExpr *ModifiedRes = applyModifierToExpr(Res, Variant);
1511 if (!ModifiedRes) {
1512 return TokError("invalid modifier '" + getTok().getIdentifier() +
1513 "' (no symbols present)");
1514 }
1515
1516 Res = ModifiedRes;
1517 Lex();
1518 }
1519
1520 // Try to constant fold it up front, if possible. Do not exploit
1521 // assembler here.
1522 int64_t Value;
1523 if (Res->evaluateAsAbsolute(Value))
1524 Res = MCConstantExpr::create(Value, getContext());
1525
1526 return false;
1527}
1528
1529bool AsmParser::parseParenExpression(const MCExpr *&Res, SMLoc &EndLoc) {
1530 Res = nullptr;
1531 return parseParenExpr(Res, EndLoc) || parseBinOpRHS(1, Res, EndLoc);
1532}
1533
1534bool AsmParser::parseParenExprOfDepth(unsigned ParenDepth, const MCExpr *&Res,
1535 SMLoc &EndLoc) {
1536 if (parseParenExpr(Res, EndLoc))
1537 return true;
1538
1539 for (; ParenDepth > 0; --ParenDepth) {
1540 if (parseBinOpRHS(1, Res, EndLoc))
1541 return true;
1542
1543 // We don't Lex() the last RParen.
1544 // This is the same behavior as parseParenExpression().
1545 if (ParenDepth - 1 > 0) {
1546 EndLoc = getTok().getEndLoc();
1547 if (parseToken(AsmToken::RParen,
1548 "expected ')' in parentheses expression"))
1549 return true;
1550 }
1551 }
1552 return false;
1553}
1554
1555bool AsmParser::parseAbsoluteExpression(int64_t &Res) {
1556 const MCExpr *Expr;
1557
1558 SMLoc StartLoc = Lexer.getLoc();
1559 if (parseExpression(Expr))
1560 return true;
1561
1562 if (!Expr->evaluateAsAbsolute(Res, getStreamer().getAssemblerPtr()))
1563 return Error(StartLoc, "expected absolute expression");
1564
1565 return false;
1566}
1567
1568static unsigned getDarwinBinOpPrecedence(AsmToken::TokenKind K,
1569 MCBinaryExpr::Opcode &Kind,
1570 bool ShouldUseLogicalShr) {
1571 switch (K) {
1572 default:
1573 return 0; // not a binop.
1574
1575 // Lowest Precedence: &&, ||
1576 case AsmToken::AmpAmp:
1577 Kind = MCBinaryExpr::LAnd;
1578 return 1;
1579 case AsmToken::PipePipe:
1580 Kind = MCBinaryExpr::LOr;
1581 return 1;
1582
1583 // Low Precedence: |, &, ^
1584 case AsmToken::Pipe:
1585 Kind = MCBinaryExpr::Or;
1586 return 2;
1587 case AsmToken::Caret:
1588 Kind = MCBinaryExpr::Xor;
1589 return 2;
1590 case AsmToken::Amp:
1591 Kind = MCBinaryExpr::And;
1592 return 2;
1593
1594 // Low Intermediate Precedence: ==, !=, <>, <, <=, >, >=
1595 case AsmToken::EqualEqual:
1596 Kind = MCBinaryExpr::EQ;
1597 return 3;
1598 case AsmToken::ExclaimEqual:
1599 case AsmToken::LessGreater:
1600 Kind = MCBinaryExpr::NE;
1601 return 3;
1602 case AsmToken::Less:
1603 Kind = MCBinaryExpr::LT;
1604 return 3;
1605 case AsmToken::LessEqual:
1606 Kind = MCBinaryExpr::LTE;
1607 return 3;
1608 case AsmToken::Greater:
1609 Kind = MCBinaryExpr::GT;
1610 return 3;
1611 case AsmToken::GreaterEqual:
1612 Kind = MCBinaryExpr::GTE;
1613 return 3;
1614
1615 // Intermediate Precedence: <<, >>
1616 case AsmToken::LessLess:
1617 Kind = MCBinaryExpr::Shl;
1618 return 4;
1619 case AsmToken::GreaterGreater:
1620 Kind = ShouldUseLogicalShr ? MCBinaryExpr::LShr : MCBinaryExpr::AShr;
1621 return 4;
1622
1623 // High Intermediate Precedence: +, -
1624 case AsmToken::Plus:
1625 Kind = MCBinaryExpr::Add;
1626 return 5;
1627 case AsmToken::Minus:
1628 Kind = MCBinaryExpr::Sub;
1629 return 5;
1630
1631 // Highest Precedence: *, /, %
1632 case AsmToken::Star:
1633 Kind = MCBinaryExpr::Mul;
1634 return 6;
1635 case AsmToken::Slash:
1636 Kind = MCBinaryExpr::Div;
1637 return 6;
1638 case AsmToken::Percent:
1639 Kind = MCBinaryExpr::Mod;
1640 return 6;
1641 }
1642}
1643
1644static unsigned getGNUBinOpPrecedence(const MCAsmInfo &MAI,
1645 AsmToken::TokenKind K,
1646 MCBinaryExpr::Opcode &Kind,
1647 bool ShouldUseLogicalShr) {
1648 switch (K) {
1649 default:
1650 return 0; // not a binop.
1651
1652 // Lowest Precedence: &&, ||
1653 case AsmToken::AmpAmp:
1654 Kind = MCBinaryExpr::LAnd;
1655 return 2;
1656 case AsmToken::PipePipe:
1657 Kind = MCBinaryExpr::LOr;
1658 return 1;
1659
1660 // Low Precedence: ==, !=, <>, <, <=, >, >=
1661 case AsmToken::EqualEqual:
1662 Kind = MCBinaryExpr::EQ;
1663 return 3;
1664 case AsmToken::ExclaimEqual:
1665 case AsmToken::LessGreater:
1666 Kind = MCBinaryExpr::NE;
1667 return 3;
1668 case AsmToken::Less:
1669 Kind = MCBinaryExpr::LT;
1670 return 3;
1671 case AsmToken::LessEqual:
1672 Kind = MCBinaryExpr::LTE;
1673 return 3;
1674 case AsmToken::Greater:
1675 Kind = MCBinaryExpr::GT;
1676 return 3;
1677 case AsmToken::GreaterEqual:
1678 Kind = MCBinaryExpr::GTE;
1679 return 3;
1680
1681 // Low Intermediate Precedence: +, -
1682 case AsmToken::Plus:
1683 Kind = MCBinaryExpr::Add;
1684 return 4;
1685 case AsmToken::Minus:
1686 Kind = MCBinaryExpr::Sub;
1687 return 4;
1688
1689 // High Intermediate Precedence: |, !, &, ^
1690 //
1691 case AsmToken::Pipe:
1692 Kind = MCBinaryExpr::Or;
1693 return 5;
1694 case AsmToken::Exclaim:
1695 // Hack to support ARM compatible aliases (implied 'sp' operand in 'srs*'
1696 // instructions like 'srsda #31!') and not parse ! as an infix operator.
1697 if (MAI.getCommentString() == "@")
1698 return 0;
1699 Kind = MCBinaryExpr::OrNot;
1700 return 5;
1701 case AsmToken::Caret:
1702 Kind = MCBinaryExpr::Xor;
1703 return 5;
1704 case AsmToken::Amp:
1705 Kind = MCBinaryExpr::And;
1706 return 5;
1707
1708 // Highest Precedence: *, /, %, <<, >>
1709 case AsmToken::Star:
1710 Kind = MCBinaryExpr::Mul;
1711 return 6;
1712 case AsmToken::Slash:
1713 Kind = MCBinaryExpr::Div;
1714 return 6;
1715 case AsmToken::Percent:
1716 Kind = MCBinaryExpr::Mod;
1717 return 6;
1718 case AsmToken::LessLess:
1719 Kind = MCBinaryExpr::Shl;
1720 return 6;
1721 case AsmToken::GreaterGreater:
1722 Kind = ShouldUseLogicalShr ? MCBinaryExpr::LShr : MCBinaryExpr::AShr;
1723 return 6;
1724 }
1725}
1726
1727unsigned AsmParser::getBinOpPrecedence(AsmToken::TokenKind K,
1728 MCBinaryExpr::Opcode &Kind) {
1729 bool ShouldUseLogicalShr = MAI.shouldUseLogicalShr();
1730 return IsDarwin ? getDarwinBinOpPrecedence(K, Kind, ShouldUseLogicalShr)
1731 : getGNUBinOpPrecedence(MAI, K, Kind, ShouldUseLogicalShr);
1732}
1733
1734/// Parse all binary operators with precedence >= 'Precedence'.
1735/// Res contains the LHS of the expression on input.
1736bool AsmParser::parseBinOpRHS(unsigned Precedence, const MCExpr *&Res,
1737 SMLoc &EndLoc) {
1738 SMLoc StartLoc = Lexer.getLoc();
1739 while (true) {
1740 MCBinaryExpr::Opcode Kind = MCBinaryExpr::Add;
1741 unsigned TokPrec = getBinOpPrecedence(Lexer.getKind(), Kind);
1742
1743 // If the next token is lower precedence than we are allowed to eat, return
1744 // successfully with what we ate already.
1745 if (TokPrec < Precedence)
1746 return false;
1747
1748 Lex();
1749
1750 // Eat the next primary expression.
1751 const MCExpr *RHS;
1752 if (getTargetParser().parsePrimaryExpr(RHS, EndLoc))
1753 return true;
1754
1755 // If BinOp binds less tightly with RHS than the operator after RHS, let
1756 // the pending operator take RHS as its LHS.
1757 MCBinaryExpr::Opcode Dummy;
1758 unsigned NextTokPrec = getBinOpPrecedence(Lexer.getKind(), Dummy);
1759 if (TokPrec < NextTokPrec && parseBinOpRHS(TokPrec + 1, RHS, EndLoc))
1760 return true;
1761
1762 // Merge LHS and RHS according to operator.
1763 Res = MCBinaryExpr::create(Kind, Res, RHS, getContext(), StartLoc);
1764 }
1765}
1766
1767/// ParseStatement:
1768/// ::= EndOfStatement
1769/// ::= Label* Directive ...Operands... EndOfStatement
1770/// ::= Label* Identifier OperandList* EndOfStatement
1771bool AsmParser::parseStatement(ParseStatementInfo &Info,
1772 MCAsmParserSemaCallback *SI) {
1773 assert(!hasPendingError() && "parseStatement started with pending error")(static_cast<void> (0));
1774 // Eat initial spaces and comments
1775 while (Lexer.is(AsmToken::Space))
1
Loop condition is false. Execution continues on line 1777
1776 Lex();
1777 if (Lexer.is(AsmToken::EndOfStatement)) {
2
Taking false branch
1778 // if this is a line comment we can drop it safely
1779 if (getTok().getString().empty() || getTok().getString().front() == '\r' ||
1780 getTok().getString().front() == '\n')
1781 Out.AddBlankLine();
1782 Lex();
1783 return false;
1784 }
1785 // Statements always start with an identifier.
1786 AsmToken ID = getTok();
1787 SMLoc IDLoc = ID.getLoc();
1788 StringRef IDVal;
1789 int64_t LocalLabelVal = -1;
1790 StartTokLoc = ID.getLoc();
1791 if (Lexer.is(AsmToken::HashDirective))
3
Taking false branch
1792 return parseCppHashLineFilenameComment(IDLoc,
1793 !isInsideMacroInstantiation());
1794
1795 // Allow an integer followed by a ':' as a directional local label.
1796 if (Lexer.is(AsmToken::Integer)) {
4
Taking false branch
1797 LocalLabelVal = getTok().getIntVal();
1798 if (LocalLabelVal < 0) {
1799 if (!TheCondState.Ignore) {
1800 Lex(); // always eat a token
1801 return Error(IDLoc, "unexpected token at start of statement");
1802 }
1803 IDVal = "";
1804 } else {
1805 IDVal = getTok().getString();
1806 Lex(); // Consume the integer token to be used as an identifier token.
1807 if (Lexer.getKind() != AsmToken::Colon) {
1808 if (!TheCondState.Ignore) {
1809 Lex(); // always eat a token
1810 return Error(IDLoc, "unexpected token at start of statement");
1811 }
1812 }
1813 }
1814 } else if (Lexer.is(AsmToken::Dot)) {
5
Taking false branch
1815 // Treat '.' as a valid identifier in this context.
1816 Lex();
1817 IDVal = ".";
1818 } else if (Lexer.is(AsmToken::LCurly)) {
6
Taking false branch
1819 // Treat '{' as a valid identifier in this context.
1820 Lex();
1821 IDVal = "{";
1822
1823 } else if (Lexer.is(AsmToken::RCurly)) {
1824 // Treat '}' as a valid identifier in this context.
1825 Lex();
1826 IDVal = "}";
1827 } else if (Lexer.is(AsmToken::Star) &&
1828 getTargetParser().starIsStartOfStatement()) {
1829 // Accept '*' as a valid start of statement.
1830 Lex();
1831 IDVal = "*";
1832 } else if (parseIdentifier(IDVal)) {
7
Assuming the condition is false
8
Taking false branch
1833 if (!TheCondState.Ignore) {
1834 Lex(); // always eat a token
1835 return Error(IDLoc, "unexpected token at start of statement");
1836 }
1837 IDVal = "";
1838 }
1839
1840 // Handle conditional assembly here before checking for skipping. We
1841 // have to do this so that .endif isn't skipped in a ".if 0" block for
1842 // example.
1843 StringMap<DirectiveKind>::const_iterator DirKindIt =
1844 DirectiveKindMap.find(IDVal.lower());
1845 DirectiveKind DirKind = (DirKindIt == DirectiveKindMap.end())
9
'?' condition is false
1846 ? DK_NO_DIRECTIVE
1847 : DirKindIt->getValue();
1848 switch (DirKind) {
10
Control jumps to the 'default' case at line 1849
1849 default:
1850 break;
1851 case DK_IF:
1852 case DK_IFEQ:
1853 case DK_IFGE:
1854 case DK_IFGT:
1855 case DK_IFLE:
1856 case DK_IFLT:
1857 case DK_IFNE:
1858 return parseDirectiveIf(IDLoc, DirKind);
1859 case DK_IFB:
1860 return parseDirectiveIfb(IDLoc, true);
1861 case DK_IFNB:
1862 return parseDirectiveIfb(IDLoc, false);
1863 case DK_IFC:
1864 return parseDirectiveIfc(IDLoc, true);
1865 case DK_IFEQS:
1866 return parseDirectiveIfeqs(IDLoc, true);
1867 case DK_IFNC:
1868 return parseDirectiveIfc(IDLoc, false);
1869 case DK_IFNES:
1870 return parseDirectiveIfeqs(IDLoc, false);
1871 case DK_IFDEF:
1872 return parseDirectiveIfdef(IDLoc, true);
1873 case DK_IFNDEF:
1874 case DK_IFNOTDEF:
1875 return parseDirectiveIfdef(IDLoc, false);
1876 case DK_ELSEIF:
1877 return parseDirectiveElseIf(IDLoc);
1878 case DK_ELSE:
1879 return parseDirectiveElse(IDLoc);
1880 case DK_ENDIF:
1881 return parseDirectiveEndIf(IDLoc);
1882 }
1883
1884 // Ignore the statement if in the middle of inactive conditional
1885 // (e.g. ".if 0").
1886 if (TheCondState.Ignore) {
11
Execution continues on line 1886
12
Assuming field 'Ignore' is false
13
Taking false branch
1887 eatToEndOfStatement();
1888 return false;
1889 }
1890
1891 // FIXME: Recurse on local labels?
1892
1893 // See what kind of statement we have.
1894 switch (Lexer.getKind()) {
14
Control jumps to the 'default' case at line 1971
1895 case AsmToken::Colon: {
1896 if (!getTargetParser().isLabel(ID))
1897 break;
1898 if (checkForValidSection())
1899 return true;
1900
1901 // identifier ':' -> Label.
1902 Lex();
1903
1904 // Diagnose attempt to use '.' as a label.
1905 if (IDVal == ".")
1906 return Error(IDLoc, "invalid use of pseudo-symbol '.' as a label");
1907
1908 // Diagnose attempt to use a variable as a label.
1909 //
1910 // FIXME: Diagnostics. Note the location of the definition as a label.
1911 // FIXME: This doesn't diagnose assignment to a symbol which has been
1912 // implicitly marked as external.
1913 MCSymbol *Sym;
1914 if (LocalLabelVal == -1) {
1915 if (ParsingMSInlineAsm && SI) {
1916 StringRef RewrittenLabel =
1917 SI->LookupInlineAsmLabel(IDVal, getSourceManager(), IDLoc, true);
1918 assert(!RewrittenLabel.empty() &&(static_cast<void> (0))
1919 "We should have an internal name here.")(static_cast<void> (0));
1920 Info.AsmRewrites->emplace_back(AOK_Label, IDLoc, IDVal.size(),
1921 RewrittenLabel);
1922 IDVal = RewrittenLabel;
1923 }
1924 Sym = getContext().getOrCreateSymbol(IDVal);
1925 } else
1926 Sym = Ctx.createDirectionalLocalSymbol(LocalLabelVal);
1927 // End of Labels should be treated as end of line for lexing
1928 // purposes but that information is not available to the Lexer who
1929 // does not understand Labels. This may cause us to see a Hash
1930 // here instead of a preprocessor line comment.
1931 if (getTok().is(AsmToken::Hash)) {
1932 StringRef CommentStr = parseStringToEndOfStatement();
1933 Lexer.Lex();
1934 Lexer.UnLex(AsmToken(AsmToken::EndOfStatement, CommentStr));
1935 }
1936
1937 // Consume any end of statement token, if present, to avoid spurious
1938 // AddBlankLine calls().
1939 if (getTok().is(AsmToken::EndOfStatement)) {
1940 Lex();
1941 }
1942
1943 if (discardLTOSymbol(IDVal))
1944 return false;
1945
1946 getTargetParser().doBeforeLabelEmit(Sym);
1947
1948 // Emit the label.
1949 if (!getTargetParser().isParsingMSInlineAsm())
1950 Out.emitLabel(Sym, IDLoc);
1951
1952 // If we are generating dwarf for assembly source files then gather the
1953 // info to make a dwarf label entry for this label if needed.
1954 if (enabledGenDwarfForAssembly())
1955 MCGenDwarfLabelEntry::Make(Sym, &getStreamer(), getSourceManager(),
1956 IDLoc);
1957
1958 getTargetParser().onLabelParsed(Sym);
1959
1960 return false;
1961 }
1962
1963 case AsmToken::Equal:
1964 if (!getTargetParser().equalIsAsmAssignment())
1965 break;
1966 // identifier '=' ... -> assignment statement
1967 Lex();
1968
1969 return parseAssignment(IDVal, true);
1970
1971 default: // Normal instruction or directive.
1972 break;
1973 }
1974
1975 // If macros are enabled, check to see if this is a macro instantiation.
1976 if (areMacrosEnabled())
15
Execution continues on line 1976
16
Assuming the condition is false
1977 if (const MCAsmMacro *M = getContext().lookupMacro(IDVal)) {
1978 return handleMacroEntry(M, IDLoc);
1979 }
1980
1981 // Otherwise, we have a normal instruction or directive.
1982
1983 // Directives start with "."
1984 if (IDVal.startswith(".") && IDVal != ".") {
17
Assuming the condition is true
18
Taking true branch
1985 // There are several entities interested in parsing directives:
1986 //
1987 // 1. The target-specific assembly parser. Some directives are target
1988 // specific or may potentially behave differently on certain targets.
1989 // 2. Asm parser extensions. For example, platform-specific parsers
1990 // (like the ELF parser) register themselves as extensions.
1991 // 3. The generic directive parser implemented by this class. These are
1992 // all the directives that behave in a target and platform independent
1993 // manner, or at least have a default behavior that's shared between
1994 // all targets and platforms.
1995
1996 getTargetParser().flushPendingInstructions(getStreamer());
1997
1998 SMLoc StartTokLoc = getTok().getLoc();
1999 bool TPDirectiveReturn = getTargetParser().ParseDirective(ID);
2000
2001 if (hasPendingError())
2002 return true;
2003 // Currently the return value should be true if we are
2004 // uninterested but as this is at odds with the standard parsing
2005 // convention (return true = error) we have instances of a parsed
2006 // directive that fails returning true as an error. Catch these
2007 // cases as best as possible errors here.
2008 if (TPDirectiveReturn && StartTokLoc != getTok().getLoc())
19
Assuming 'TPDirectiveReturn' is true
2009 return true;
2010 // Return if we did some parsing or believe we succeeded.
2011 if (!TPDirectiveReturn
19.1
'TPDirectiveReturn' is true
19.1
'TPDirectiveReturn' is true
19.1
'TPDirectiveReturn' is true
|| StartTokLoc != getTok().getLoc())
20
Taking false branch
2012 return false;
2013
2014 // Next, check the extension directive map to see if any extension has
2015 // registered itself to parse this directive.
2016 std::pair<MCAsmParserExtension *, DirectiveHandler> Handler =
2017 ExtensionDirectiveMap.lookup(IDVal);
2018 if (Handler.first)
21
Assuming field 'first' is null
22
Taking false branch
2019 return (*Handler.second)(Handler.first, IDVal, IDLoc);
2020
2021 // Finally, if no one else is interested in this directive, it must be
2022 // generic and familiar to this class.
2023 switch (DirKind) {
23
Control jumps to 'case DK_IRPC:' at line 2134
2024 default:
2025 break;
2026 case DK_SET:
2027 case DK_EQU:
2028 return parseDirectiveSet(IDVal, true);
2029 case DK_EQUIV:
2030 return parseDirectiveSet(IDVal, false);
2031 case DK_ASCII:
2032 return parseDirectiveAscii(IDVal, false);
2033 case DK_ASCIZ:
2034 case DK_STRING:
2035 return parseDirectiveAscii(IDVal, true);
2036 case DK_BYTE:
2037 case DK_DC_B:
2038 return parseDirectiveValue(IDVal, 1);
2039 case DK_DC:
2040 case DK_DC_W:
2041 case DK_SHORT:
2042 case DK_VALUE:
2043 case DK_2BYTE:
2044 return parseDirectiveValue(IDVal, 2);
2045 case DK_LONG:
2046 case DK_INT:
2047 case DK_4BYTE:
2048 case DK_DC_L:
2049 return parseDirectiveValue(IDVal, 4);
2050 case DK_QUAD:
2051 case DK_8BYTE:
2052 return parseDirectiveValue(IDVal, 8);
2053 case DK_DC_A:
2054 return parseDirectiveValue(
2055 IDVal, getContext().getAsmInfo()->getCodePointerSize());
2056 case DK_OCTA:
2057 return parseDirectiveOctaValue(IDVal);
2058 case DK_SINGLE:
2059 case DK_FLOAT:
2060 case DK_DC_S:
2061 return parseDirectiveRealValue(IDVal, APFloat::IEEEsingle());
2062 case DK_DOUBLE:
2063 case DK_DC_D:
2064 return parseDirectiveRealValue(IDVal, APFloat::IEEEdouble());
2065 case DK_ALIGN: {
2066 bool IsPow2 = !getContext().getAsmInfo()->getAlignmentIsInBytes();
2067 return parseDirectiveAlign(IsPow2, /*ExprSize=*/1);
2068 }
2069 case DK_ALIGN32: {
2070 bool IsPow2 = !getContext().getAsmInfo()->getAlignmentIsInBytes();
2071 return parseDirectiveAlign(IsPow2, /*ExprSize=*/4);
2072 }
2073 case DK_BALIGN:
2074 return parseDirectiveAlign(/*IsPow2=*/false, /*ExprSize=*/1);
2075 case DK_BALIGNW:
2076 return parseDirectiveAlign(/*IsPow2=*/false, /*ExprSize=*/2);
2077 case DK_BALIGNL:
2078 return parseDirectiveAlign(/*IsPow2=*/false, /*ExprSize=*/4);
2079 case DK_P2ALIGN:
2080 return parseDirectiveAlign(/*IsPow2=*/true, /*ExprSize=*/1);
2081 case DK_P2ALIGNW:
2082 return parseDirectiveAlign(/*IsPow2=*/true, /*ExprSize=*/2);
2083 case DK_P2ALIGNL:
2084 return parseDirectiveAlign(/*IsPow2=*/true, /*ExprSize=*/4);
2085 case DK_ORG:
2086 return parseDirectiveOrg();
2087 case DK_FILL:
2088 return parseDirectiveFill();
2089 case DK_ZERO:
2090 return parseDirectiveZero();
2091 case DK_EXTERN:
2092 eatToEndOfStatement(); // .extern is the default, ignore it.
2093 return false;
2094 case DK_GLOBL:
2095 case DK_GLOBAL:
2096 return parseDirectiveSymbolAttribute(MCSA_Global);
2097 case DK_LAZY_REFERENCE:
2098 return parseDirectiveSymbolAttribute(MCSA_LazyReference);
2099 case DK_NO_DEAD_STRIP:
2100 return parseDirectiveSymbolAttribute(MCSA_NoDeadStrip);
2101 case DK_SYMBOL_RESOLVER:
2102 return parseDirectiveSymbolAttribute(MCSA_SymbolResolver);
2103 case DK_PRIVATE_EXTERN:
2104 return parseDirectiveSymbolAttribute(MCSA_PrivateExtern);
2105 case DK_REFERENCE:
2106 return parseDirectiveSymbolAttribute(MCSA_Reference);
2107 case DK_WEAK_DEFINITION:
2108 return parseDirectiveSymbolAttribute(MCSA_WeakDefinition);
2109 case DK_WEAK_REFERENCE:
2110 return parseDirectiveSymbolAttribute(MCSA_WeakReference);
2111 case DK_WEAK_DEF_CAN_BE_HIDDEN:
2112 return parseDirectiveSymbolAttribute(MCSA_WeakDefAutoPrivate);
2113 case DK_COLD:
2114 return parseDirectiveSymbolAttribute(MCSA_Cold);
2115 case DK_COMM:
2116 case DK_COMMON:
2117 return parseDirectiveComm(/*IsLocal=*/false);
2118 case DK_LCOMM:
2119 return parseDirectiveComm(/*IsLocal=*/true);
2120 case DK_ABORT:
2121 return parseDirectiveAbort();
2122 case DK_INCLUDE:
2123 return parseDirectiveInclude();
2124 case DK_INCBIN:
2125 return parseDirectiveIncbin();
2126 case DK_CODE16:
2127 case DK_CODE16GCC:
2128 return TokError(Twine(IDVal) +
2129 " not currently supported for this target");
2130 case DK_REPT:
2131 return parseDirectiveRept(IDLoc, IDVal);
2132 case DK_IRP:
2133 return parseDirectiveIrp(IDLoc);
2134 case DK_IRPC:
2135 return parseDirectiveIrpc(IDLoc);
24
Calling 'AsmParser::parseDirectiveIrpc'
2136 case DK_ENDR:
2137 return parseDirectiveEndr(IDLoc);
2138 case DK_BUNDLE_ALIGN_MODE:
2139 return parseDirectiveBundleAlignMode();
2140 case DK_BUNDLE_LOCK:
2141 return parseDirectiveBundleLock();
2142 case DK_BUNDLE_UNLOCK:
2143 return parseDirectiveBundleUnlock();
2144 case DK_SLEB128:
2145 return parseDirectiveLEB128(true);
2146 case DK_ULEB128:
2147 return parseDirectiveLEB128(false);
2148 case DK_SPACE:
2149 case DK_SKIP:
2150 return parseDirectiveSpace(IDVal);
2151 case DK_FILE:
2152 return parseDirectiveFile(IDLoc);
2153 case DK_LINE:
2154 return parseDirectiveLine();
2155 case DK_LOC:
2156 return parseDirectiveLoc();
2157 case DK_STABS:
2158 return parseDirectiveStabs();
2159 case DK_CV_FILE:
2160 return parseDirectiveCVFile();
2161 case DK_CV_FUNC_ID:
2162 return parseDirectiveCVFuncId();
2163 case DK_CV_INLINE_SITE_ID:
2164 return parseDirectiveCVInlineSiteId();
2165 case DK_CV_LOC:
2166 return parseDirectiveCVLoc();
2167 case DK_CV_LINETABLE:
2168 return parseDirectiveCVLinetable();
2169 case DK_CV_INLINE_LINETABLE:
2170 return parseDirectiveCVInlineLinetable();
2171 case DK_CV_DEF_RANGE:
2172 return parseDirectiveCVDefRange();
2173 case DK_CV_STRING:
2174 return parseDirectiveCVString();
2175 case DK_CV_STRINGTABLE:
2176 return parseDirectiveCVStringTable();
2177 case DK_CV_FILECHECKSUMS:
2178 return parseDirectiveCVFileChecksums();
2179 case DK_CV_FILECHECKSUM_OFFSET:
2180 return parseDirectiveCVFileChecksumOffset();
2181 case DK_CV_FPO_DATA:
2182 return parseDirectiveCVFPOData();
2183 case DK_CFI_SECTIONS:
2184 return parseDirectiveCFISections();
2185 case DK_CFI_STARTPROC:
2186 return parseDirectiveCFIStartProc();
2187 case DK_CFI_ENDPROC:
2188 return parseDirectiveCFIEndProc();
2189 case DK_CFI_DEF_CFA:
2190 return parseDirectiveCFIDefCfa(IDLoc);
2191 case DK_CFI_DEF_CFA_OFFSET:
2192 return parseDirectiveCFIDefCfaOffset();
2193 case DK_CFI_ADJUST_CFA_OFFSET:
2194 return parseDirectiveCFIAdjustCfaOffset();
2195 case DK_CFI_DEF_CFA_REGISTER:
2196 return parseDirectiveCFIDefCfaRegister(IDLoc);
2197 case DK_CFI_LLVM_DEF_ASPACE_CFA:
2198 return parseDirectiveCFILLVMDefAspaceCfa(IDLoc);
2199 case DK_CFI_OFFSET:
2200 return parseDirectiveCFIOffset(IDLoc);
2201 case DK_CFI_REL_OFFSET:
2202 return parseDirectiveCFIRelOffset(IDLoc);
2203 case DK_CFI_PERSONALITY:
2204 return parseDirectiveCFIPersonalityOrLsda(true);
2205 case DK_CFI_LSDA:
2206 return parseDirectiveCFIPersonalityOrLsda(false);
2207 case DK_CFI_REMEMBER_STATE:
2208 return parseDirectiveCFIRememberState();
2209 case DK_CFI_RESTORE_STATE:
2210 return parseDirectiveCFIRestoreState();
2211 case DK_CFI_SAME_VALUE:
2212 return parseDirectiveCFISameValue(IDLoc);
2213 case DK_CFI_RESTORE:
2214 return parseDirectiveCFIRestore(IDLoc);
2215 case DK_CFI_ESCAPE:
2216 return parseDirectiveCFIEscape();
2217 case DK_CFI_RETURN_COLUMN:
2218 return parseDirectiveCFIReturnColumn(IDLoc);
2219 case DK_CFI_SIGNAL_FRAME:
2220 return parseDirectiveCFISignalFrame();
2221 case DK_CFI_UNDEFINED:
2222 return parseDirectiveCFIUndefined(IDLoc);
2223 case DK_CFI_REGISTER:
2224 return parseDirectiveCFIRegister(IDLoc);
2225 case DK_CFI_WINDOW_SAVE:
2226 return parseDirectiveCFIWindowSave();
2227 case DK_MACROS_ON:
2228 case DK_MACROS_OFF:
2229 return parseDirectiveMacrosOnOff(IDVal);
2230 case DK_MACRO:
2231 return parseDirectiveMacro(IDLoc);
2232 case DK_ALTMACRO:
2233 case DK_NOALTMACRO:
2234 return parseDirectiveAltmacro(IDVal);
2235 case DK_EXITM:
2236 return parseDirectiveExitMacro(IDVal);
2237 case DK_ENDM:
2238 case DK_ENDMACRO:
2239 return parseDirectiveEndMacro(IDVal);
2240 case DK_PURGEM:
2241 return parseDirectivePurgeMacro(IDLoc);
2242 case DK_END:
2243 return parseDirectiveEnd(IDLoc);
2244 case DK_ERR:
2245 return parseDirectiveError(IDLoc, false);
2246 case DK_ERROR:
2247 return parseDirectiveError(IDLoc, true);
2248 case DK_WARNING:
2249 return parseDirectiveWarning(IDLoc);
2250 case DK_RELOC:
2251 return parseDirectiveReloc(IDLoc);
2252 case DK_DCB:
2253 case DK_DCB_W:
2254 return parseDirectiveDCB(IDVal, 2);
2255 case DK_DCB_B:
2256 return parseDirectiveDCB(IDVal, 1);
2257 case DK_DCB_D:
2258 return parseDirectiveRealDCB(IDVal, APFloat::IEEEdouble());
2259 case DK_DCB_L:
2260 return parseDirectiveDCB(IDVal, 4);
2261 case DK_DCB_S:
2262 return parseDirectiveRealDCB(IDVal, APFloat::IEEEsingle());
2263 case DK_DC_X:
2264 case DK_DCB_X:
2265 return TokError(Twine(IDVal) +
2266 " not currently supported for this target");
2267 case DK_DS:
2268 case DK_DS_W:
2269 return parseDirectiveDS(IDVal, 2);
2270 case DK_DS_B:
2271 return parseDirectiveDS(IDVal, 1);
2272 case DK_DS_D:
2273 return parseDirectiveDS(IDVal, 8);
2274 case DK_DS_L:
2275 case DK_DS_S:
2276 return parseDirectiveDS(IDVal, 4);
2277 case DK_DS_P:
2278 case DK_DS_X:
2279 return parseDirectiveDS(IDVal, 12);
2280 case DK_PRINT:
2281 return parseDirectivePrint(IDLoc);
2282 case DK_ADDRSIG:
2283 return parseDirectiveAddrsig();
2284 case DK_ADDRSIG_SYM:
2285 return parseDirectiveAddrsigSym();
2286 case DK_PSEUDO_PROBE:
2287 return parseDirectivePseudoProbe();
2288 case DK_LTO_DISCARD:
2289 return parseDirectiveLTODiscard();
2290 }
2291
2292 return Error(IDLoc, "unknown directive");
2293 }
2294
2295 // __asm _emit or __asm __emit
2296 if (ParsingMSInlineAsm && (IDVal == "_emit" || IDVal == "__emit" ||
2297 IDVal == "_EMIT" || IDVal == "__EMIT"))
2298 return parseDirectiveMSEmit(IDLoc, Info, IDVal.size());
2299
2300 // __asm align
2301 if (ParsingMSInlineAsm && (IDVal == "align" || IDVal == "ALIGN"))
2302 return parseDirectiveMSAlign(IDLoc, Info);
2303
2304 if (ParsingMSInlineAsm && (IDVal == "even" || IDVal == "EVEN"))
2305 Info.AsmRewrites->emplace_back(AOK_EVEN, IDLoc, 4);
2306 if (checkForValidSection())
2307 return true;
2308
2309 return parseAndMatchAndEmitTargetInstruction(Info, IDVal, ID, IDLoc);
2310}
2311
2312bool AsmParser::parseAndMatchAndEmitTargetInstruction(ParseStatementInfo &Info,
2313 StringRef IDVal,
2314 AsmToken ID,
2315 SMLoc IDLoc) {
2316 // Canonicalize the opcode to lower case.
2317 std::string OpcodeStr = IDVal.lower();
2318 ParseInstructionInfo IInfo(Info.AsmRewrites);
2319 bool ParseHadError = getTargetParser().ParseInstruction(IInfo, OpcodeStr, ID,
2320 Info.ParsedOperands);
2321 Info.ParseError = ParseHadError;
2322
2323 // Dump the parsed representation, if requested.
2324 if (getShowParsedOperands()) {
2325 SmallString<256> Str;
2326 raw_svector_ostream OS(Str);
2327 OS << "parsed instruction: [";
2328 for (unsigned i = 0; i != Info.ParsedOperands.size(); ++i) {
2329 if (i != 0)
2330 OS << ", ";
2331 Info.ParsedOperands[i]->print(OS);
2332 }
2333 OS << "]";
2334
2335 printMessage(IDLoc, SourceMgr::DK_Note, OS.str());
2336 }
2337
2338 // Fail even if ParseInstruction erroneously returns false.
2339 if (hasPendingError() || ParseHadError)
2340 return true;
2341
2342 // If we are generating dwarf for the current section then generate a .loc
2343 // directive for the instruction.
2344 if (!ParseHadError && enabledGenDwarfForAssembly() &&
2345 getContext().getGenDwarfSectionSyms().count(
2346 getStreamer().getCurrentSectionOnly())) {
2347 unsigned Line;
2348 if (ActiveMacros.empty())
2349 Line = SrcMgr.FindLineNumber(IDLoc, CurBuffer);
2350 else
2351 Line = SrcMgr.FindLineNumber(ActiveMacros.front()->InstantiationLoc,
2352 ActiveMacros.front()->ExitBuffer);
2353
2354 // If we previously parsed a cpp hash file line comment then make sure the
2355 // current Dwarf File is for the CppHashFilename if not then emit the
2356 // Dwarf File table for it and adjust the line number for the .loc.
2357 if (!CppHashInfo.Filename.empty()) {
2358 unsigned FileNumber = getStreamer().emitDwarfFileDirective(
2359 0, StringRef(), CppHashInfo.Filename);
2360 getContext().setGenDwarfFileNumber(FileNumber);
2361
2362 unsigned CppHashLocLineNo =
2363 SrcMgr.FindLineNumber(CppHashInfo.Loc, CppHashInfo.Buf);
2364 Line = CppHashInfo.LineNumber - 1 + (Line - CppHashLocLineNo);
2365 }
2366
2367 getStreamer().emitDwarfLocDirective(
2368 getContext().getGenDwarfFileNumber(), Line, 0,
2369 DWARF2_LINE_DEFAULT_IS_STMT1 ? DWARF2_FLAG_IS_STMT(1 << 0) : 0, 0, 0,
2370 StringRef());
2371 }
2372
2373 // If parsing succeeded, match the instruction.
2374 if (!ParseHadError) {
2375 uint64_t ErrorInfo;
2376 if (getTargetParser().MatchAndEmitInstruction(
2377 IDLoc, Info.Opcode, Info.ParsedOperands, Out, ErrorInfo,
2378 getTargetParser().isParsingMSInlineAsm()))
2379 return true;
2380 }
2381 return false;
2382}
2383
2384// Parse and erase curly braces marking block start/end
2385bool
2386AsmParser::parseCurlyBlockScope(SmallVectorImpl<AsmRewrite> &AsmStrRewrites) {
2387 // Identify curly brace marking block start/end
2388 if (Lexer.isNot(AsmToken::LCurly) && Lexer.isNot(AsmToken::RCurly))
2389 return false;
2390
2391 SMLoc StartLoc = Lexer.getLoc();
2392 Lex(); // Eat the brace
2393 if (Lexer.is(AsmToken::EndOfStatement))
2394 Lex(); // Eat EndOfStatement following the brace
2395
2396 // Erase the block start/end brace from the output asm string
2397 AsmStrRewrites.emplace_back(AOK_Skip, StartLoc, Lexer.getLoc().getPointer() -
2398 StartLoc.getPointer());
2399 return true;
2400}
2401
2402/// parseCppHashLineFilenameComment as this:
2403/// ::= # number "filename"
2404bool AsmParser::parseCppHashLineFilenameComment(SMLoc L, bool SaveLocInfo) {
2405 Lex(); // Eat the hash token.
2406 // Lexer only ever emits HashDirective if it fully formed if it's
2407 // done the checking already so this is an internal error.
2408 assert(getTok().is(AsmToken::Integer) &&(static_cast<void> (0))
2409 "Lexing Cpp line comment: Expected Integer")(static_cast<void> (0));
2410 int64_t LineNumber = getTok().getIntVal();
2411 Lex();
2412 assert(getTok().is(AsmToken::String) &&(static_cast<void> (0))
2413 "Lexing Cpp line comment: Expected String")(static_cast<void> (0));
2414 StringRef Filename = getTok().getString();
2415 Lex();
2416
2417 if (!SaveLocInfo)
2418 return false;
2419
2420 // Get rid of the enclosing quotes.
2421 Filename = Filename.substr(1, Filename.size() - 2);
2422
2423 // Save the SMLoc, Filename and LineNumber for later use by diagnostics
2424 // and possibly DWARF file info.
2425 CppHashInfo.Loc = L;
2426 CppHashInfo.Filename = Filename;
2427 CppHashInfo.LineNumber = LineNumber;
2428 CppHashInfo.Buf = CurBuffer;
2429 if (FirstCppHashFilename.empty())
2430 FirstCppHashFilename = Filename;
2431 return false;
2432}
2433
2434/// will use the last parsed cpp hash line filename comment
2435/// for the Filename and LineNo if any in the diagnostic.
2436void AsmParser::DiagHandler(const SMDiagnostic &Diag, void *Context) {
2437 auto *Parser = static_cast<AsmParser *>(Context);
2438 raw_ostream &OS = errs();
2439
2440 const SourceMgr &DiagSrcMgr = *Diag.getSourceMgr();
2441 SMLoc DiagLoc = Diag.getLoc();
2442 unsigned DiagBuf = DiagSrcMgr.FindBufferContainingLoc(DiagLoc);
2443 unsigned CppHashBuf =
2444 Parser->SrcMgr.FindBufferContainingLoc(Parser->CppHashInfo.Loc);
2445
2446 // Like SourceMgr::printMessage() we need to print the include stack if any
2447 // before printing the message.
2448 unsigned DiagCurBuffer = DiagSrcMgr.FindBufferContainingLoc(DiagLoc);
2449 if (!Parser->SavedDiagHandler && DiagCurBuffer &&
2450 DiagCurBuffer != DiagSrcMgr.getMainFileID()) {
2451 SMLoc ParentIncludeLoc = DiagSrcMgr.getParentIncludeLoc(DiagCurBuffer);
2452 DiagSrcMgr.PrintIncludeStack(ParentIncludeLoc, OS);
2453 }
2454
2455 // If we have not parsed a cpp hash line filename comment or the source
2456 // manager changed or buffer changed (like in a nested include) then just
2457 // print the normal diagnostic using its Filename and LineNo.
2458 if (!Parser->CppHashInfo.LineNumber || DiagBuf != CppHashBuf) {
2459 if (Parser->SavedDiagHandler)
2460 Parser->SavedDiagHandler(Diag, Parser->SavedDiagContext);
2461 else
2462 Parser->getContext().diagnose(Diag);
2463 return;
2464 }
2465
2466 // Use the CppHashFilename and calculate a line number based on the
2467 // CppHashInfo.Loc and CppHashInfo.LineNumber relative to this Diag's SMLoc
2468 // for the diagnostic.
2469 const std::string &Filename = std::string(Parser->CppHashInfo.Filename);
2470
2471 int DiagLocLineNo = DiagSrcMgr.FindLineNumber(DiagLoc, DiagBuf);
2472 int CppHashLocLineNo =
2473 Parser->SrcMgr.FindLineNumber(Parser->CppHashInfo.Loc, CppHashBuf);
2474 int LineNo =
2475 Parser->CppHashInfo.LineNumber - 1 + (DiagLocLineNo - CppHashLocLineNo);
2476
2477 SMDiagnostic NewDiag(*Diag.getSourceMgr(), Diag.getLoc(), Filename, LineNo,
2478 Diag.getColumnNo(), Diag.getKind(), Diag.getMessage(),
2479 Diag.getLineContents(), Diag.getRanges());
2480
2481 if (Parser->SavedDiagHandler)
2482 Parser->SavedDiagHandler(Diag, Parser->SavedDiagContext);
2483 else
2484 Parser->getContext().diagnose(NewDiag);
2485}
2486
2487// FIXME: This is mostly duplicated from the function in AsmLexer.cpp. The
2488// difference being that that function accepts '@' as part of identifiers and
2489// we can't do that. AsmLexer.cpp should probably be changed to handle
2490// '@' as a special case when needed.
2491static bool isIdentifierChar(char c) {
2492 return isalnum(static_cast<unsigned char>(c)) || c == '_' || c == '$' ||
2493 c == '.';
2494}
2495
2496bool AsmParser::expandMacro(raw_svector_ostream &OS, StringRef Body,
2497 ArrayRef<MCAsmMacroParameter> Parameters,
2498 ArrayRef<MCAsmMacroArgument> A,
2499 bool EnableAtPseudoVariable, SMLoc L) {
2500 unsigned NParameters = Parameters.size();
2501 bool HasVararg = NParameters ? Parameters.back().Vararg : false;
2502 if ((!IsDarwin || NParameters != 0) && NParameters != A.size())
2503 return Error(L, "Wrong number of arguments");
2504
2505 // A macro without parameters is handled differently on Darwin:
2506 // gas accepts no arguments and does no substitutions
2507 while (!Body.empty()) {
2508 // Scan for the next substitution.
2509 std::size_t End = Body.size(), Pos = 0;
2510 for (; Pos != End; ++Pos) {
2511 // Check for a substitution or escape.
2512 if (IsDarwin && !NParameters) {
2513 // This macro has no parameters, look for $0, $1, etc.
2514 if (Body[Pos] != '$' || Pos + 1 == End)
2515 continue;
2516
2517 char Next = Body[Pos + 1];
2518 if (Next == '$' || Next == 'n' ||
2519 isdigit(static_cast<unsigned char>(Next)))
2520 break;
2521 } else {
2522 // This macro has parameters, look for \foo, \bar, etc.
2523 if (Body[Pos] == '\\' && Pos + 1 != End)
2524 break;
2525 }
2526 }
2527
2528 // Add the prefix.
2529 OS << Body.slice(0, Pos);
2530
2531 // Check if we reached the end.
2532 if (Pos == End)
2533 break;
2534
2535 if (IsDarwin && !NParameters) {
2536 switch (Body[Pos + 1]) {
2537 // $$ => $
2538 case '$':
2539 OS << '$';
2540 break;
2541
2542 // $n => number of arguments
2543 case 'n':
2544 OS << A.size();
2545 break;
2546
2547 // $[0-9] => argument
2548 default: {
2549 // Missing arguments are ignored.
2550 unsigned Index = Body[Pos + 1] - '0';
2551 if (Index >= A.size())
2552 break;
2553
2554 // Otherwise substitute with the token values, with spaces eliminated.
2555 for (const AsmToken &Token : A[Index])
2556 OS << Token.getString();
2557 break;
2558 }
2559 }
2560 Pos += 2;
2561 } else {
2562 unsigned I = Pos + 1;
2563
2564 // Check for the \@ pseudo-variable.
2565 if (EnableAtPseudoVariable && Body[I] == '@' && I + 1 != End)
2566 ++I;
2567 else
2568 while (isIdentifierChar(Body[I]) && I + 1 != End)
2569 ++I;
2570
2571 const char *Begin = Body.data() + Pos + 1;
2572 StringRef Argument(Begin, I - (Pos + 1));
2573 unsigned Index = 0;
2574
2575 if (Argument == "@") {
2576 OS << NumOfMacroInstantiations;
2577 Pos += 2;
2578 } else {
2579 for (; Index < NParameters; ++Index)
2580 if (Parameters[Index].Name == Argument)
2581 break;
2582
2583 if (Index == NParameters) {
2584 if (Body[Pos + 1] == '(' && Body[Pos + 2] == ')')
2585 Pos += 3;
2586 else {
2587 OS << '\\' << Argument;
2588 Pos = I;
2589 }
2590 } else {
2591 bool VarargParameter = HasVararg && Index == (NParameters - 1);
2592 for (const AsmToken &Token : A[Index])
2593 // For altmacro mode, you can write '%expr'.
2594 // The prefix '%' evaluates the expression 'expr'
2595 // and uses the result as a string (e.g. replace %(1+2) with the
2596 // string "3").
2597 // Here, we identify the integer token which is the result of the
2598 // absolute expression evaluation and replace it with its string
2599 // representation.
2600 if (AltMacroMode && Token.getString().front() == '%' &&
2601 Token.is(AsmToken::Integer))
2602 // Emit an integer value to the buffer.
2603 OS << Token.getIntVal();
2604 // Only Token that was validated as a string and begins with '<'
2605 // is considered altMacroString!!!
2606 else if (AltMacroMode && Token.getString().front() == '<' &&
2607 Token.is(AsmToken::String)) {
2608 OS << angleBracketString(Token.getStringContents());
2609 }
2610 // We expect no quotes around the string's contents when
2611 // parsing for varargs.
2612 else if (Token.isNot(AsmToken::String) || VarargParameter)
2613 OS << Token.getString();
2614 else
2615 OS << Token.getStringContents();
2616
2617 Pos += 1 + Argument.size();
2618 }
2619 }
2620 }
2621 // Update the scan point.
2622 Body = Body.substr(Pos);
2623 }
2624
2625 return false;
2626}
2627
2628static bool isOperator(AsmToken::TokenKind kind) {
2629 switch (kind) {
2630 default:
2631 return false;
2632 case AsmToken::Plus:
2633 case AsmToken::Minus:
2634 case AsmToken::Tilde:
2635 case AsmToken::Slash:
2636 case AsmToken::Star:
2637 case AsmToken::Dot:
2638 case AsmToken::Equal:
2639 case AsmToken::EqualEqual:
2640 case AsmToken::Pipe:
2641 case AsmToken::PipePipe:
2642 case AsmToken::Caret:
2643 case AsmToken::Amp:
2644 case AsmToken::AmpAmp:
2645 case AsmToken::Exclaim:
2646 case AsmToken::ExclaimEqual:
2647 case AsmToken::Less:
2648 case AsmToken::LessEqual:
2649 case AsmToken::LessLess:
2650 case AsmToken::LessGreater:
2651 case AsmToken::Greater:
2652 case AsmToken::GreaterEqual:
2653 case AsmToken::GreaterGreater:
2654 return true;
2655 }
2656}
2657
2658namespace {
2659
2660class AsmLexerSkipSpaceRAII {
2661public:
2662 AsmLexerSkipSpaceRAII(AsmLexer &Lexer, bool SkipSpace) : Lexer(Lexer) {
2663 Lexer.setSkipSpace(SkipSpace);
2664 }
2665
2666 ~AsmLexerSkipSpaceRAII() {
2667 Lexer.setSkipSpace(true);
2668 }
2669
2670private:
2671 AsmLexer &Lexer;
2672};
2673
2674} // end anonymous namespace
2675
2676bool AsmParser::parseMacroArgument(MCAsmMacroArgument &MA, bool Vararg) {
2677
2678 if (Vararg) {
2679 if (Lexer.isNot(AsmToken::EndOfStatement)) {
2680 StringRef Str = parseStringToEndOfStatement();
2681 MA.emplace_back(AsmToken::String, Str);
2682 }
2683 return false;
2684 }
2685
2686 unsigned ParenLevel = 0;
2687
2688 // Darwin doesn't use spaces to delmit arguments.
2689 AsmLexerSkipSpaceRAII ScopedSkipSpace(Lexer, IsDarwin);
2690
2691 bool SpaceEaten;
2692
2693 while (true) {
2694 SpaceEaten = false;
2695 if (Lexer.is(AsmToken::Eof) || Lexer.is(AsmToken::Equal))
2696 return TokError("unexpected token in macro instantiation");
2697
2698 if (ParenLevel == 0) {
2699
2700 if (Lexer.is(AsmToken::Comma))
2701 break;
2702
2703 if (Lexer.is(AsmToken::Space)) {
2704 SpaceEaten = true;
2705 Lexer.Lex(); // Eat spaces
2706 }
2707
2708 // Spaces can delimit parameters, but could also be part an expression.
2709 // If the token after a space is an operator, add the token and the next
2710 // one into this argument
2711 if (!IsDarwin) {
2712 if (isOperator(Lexer.getKind())) {
2713 MA.push_back(getTok());
2714 Lexer.Lex();
2715
2716 // Whitespace after an operator can be ignored.
2717 if (Lexer.is(AsmToken::Space))
2718 Lexer.Lex();
2719
2720 continue;
2721 }
2722 }
2723 if (SpaceEaten)
2724 break;
2725 }
2726
2727 // handleMacroEntry relies on not advancing the lexer here
2728 // to be able to fill in the remaining default parameter values
2729 if (Lexer.is(AsmToken::EndOfStatement))
2730 break;
2731
2732 // Adjust the current parentheses level.
2733 if (Lexer.is(AsmToken::LParen))
2734 ++ParenLevel;
2735 else if (Lexer.is(AsmToken::RParen) && ParenLevel)
2736 --ParenLevel;
2737
2738 // Append the token to the current argument list.
2739 MA.push_back(getTok());
2740 Lexer.Lex();
2741 }
2742
2743 if (ParenLevel != 0)
2744 return TokError("unbalanced parentheses in macro argument");
2745 return false;
2746}
2747
2748// Parse the macro instantiation arguments.
2749bool AsmParser::parseMacroArguments(const MCAsmMacro *M,
2750 MCAsmMacroArguments &A) {
2751 const unsigned NParameters = M
28.1
'M' is null
28.1
'M' is null
28.1
'M' is null
? M->Parameters.size() : 0;
29
'?' condition is false
2752 bool NamedParametersFound = false;
2753 SmallVector<SMLoc, 4> FALocs;
2754
2755 A.resize(NParameters);
2756 FALocs.resize(NParameters);
2757
2758 // Parse two kinds of macro invocations:
2759 // - macros defined without any parameters accept an arbitrary number of them
2760 // - macros defined with parameters accept at most that many of them
2761 bool HasVararg = NParameters
29.1
'NParameters' is 0
29.1
'NParameters' is 0
29.1
'NParameters' is 0
? M->Parameters.back().Vararg : false;
30
'?' condition is false
2762 for (unsigned Parameter = 0; !NParameters
30.1
'NParameters' is 0
30.1
'NParameters' is 0
30.1
'NParameters' is 0
|| Parameter < NParameters;
2763 ++Parameter) {
2764 SMLoc IDLoc = Lexer.getLoc();
2765 MCAsmMacroParameter FA;
2766
2767 if (Lexer.is(AsmToken::Identifier) && Lexer.peekTok().is(AsmToken::Equal)) {
2768 if (parseIdentifier(FA.Name))
2769 return Error(IDLoc, "invalid argument identifier for formal argument");
2770
2771 if (Lexer.isNot(AsmToken::Equal))
2772 return TokError("expected '=' after formal parameter identifier");
2773
2774 Lex();
2775
2776 NamedParametersFound = true;
2777 }
2778 bool Vararg = HasVararg
30.2
'HasVararg' is false
30.2
'HasVararg' is false
30.2
'HasVararg' is false
&& Parameter == (NParameters - 1);
2779
2780 if (NamedParametersFound
30.3
'NamedParametersFound' is false
30.3
'NamedParametersFound' is false
30.3
'NamedParametersFound' is false
&& FA.Name.empty())
2781 return Error(IDLoc, "cannot mix positional and keyword arguments");
2782
2783 SMLoc StrLoc = Lexer.getLoc();
2784 SMLoc EndLoc;
2785 if (AltMacroMode && Lexer.is(AsmToken::Percent)) {
31
Assuming field 'AltMacroMode' is true
32
Calling 'MCAsmLexer::is'
38
Returning from 'MCAsmLexer::is'
39
Taking true branch
2786 const MCExpr *AbsoluteExp;
2787 int64_t Value;
2788 /// Eat '%'
2789 Lex();
2790 if (parseExpression(AbsoluteExp, EndLoc))
40
Assuming the condition is false
41
Taking false branch
2791 return false;
2792 if (!AbsoluteExp->evaluateAsAbsolute(Value,
42
Assuming the condition is false
43
Taking false branch
2793 getStreamer().getAssemblerPtr()))
2794 return Error(StrLoc, "expected absolute expression");
2795 const char *StrChar = StrLoc.getPointer();
2796 const char *EndChar = EndLoc.getPointer();
2797 AsmToken newToken(AsmToken::Integer,
2798 StringRef(StrChar, EndChar - StrChar), Value);
2799 FA.Value.push_back(newToken);
2800 } else if (AltMacroMode && Lexer.is(AsmToken::Less) &&
2801 isAngleBracketString(StrLoc, EndLoc)) {
2802 const char *StrChar = StrLoc.getPointer();
2803 const char *EndChar = EndLoc.getPointer();
2804 jumpToLoc(EndLoc, CurBuffer);
2805 /// Eat from '<' to '>'
2806 Lex();
2807 AsmToken newToken(AsmToken::String,
2808 StringRef(StrChar, EndChar - StrChar));
2809 FA.Value.push_back(newToken);
2810 } else if(parseMacroArgument(FA.Value, Vararg))
2811 return true;
2812
2813 unsigned PI = Parameter;
2814 if (!FA.Name.empty()) {
44
Assuming the condition is true
45
Taking true branch
2815 unsigned FAI = 0;
2816 for (FAI = 0; FAI < NParameters; ++FAI)
46
Loop condition is false. Execution continues on line 2820
2817 if (M->Parameters[FAI].Name == FA.Name)
2818 break;
2819
2820 if (FAI
46.1
'FAI' is >= 'NParameters'
46.1
'FAI' is >= 'NParameters'
46.1
'FAI' is >= 'NParameters'
>= NParameters) {
47
Taking true branch
2821 assert(M && "expected macro to be defined")(static_cast<void> (0));
2822 return Error(IDLoc, "parameter named '" + FA.Name +
2823 "' does not exist for macro '" + M->Name + "'");
48
Forming reference to null pointer
2824 }
2825 PI = FAI;
2826 }
2827
2828 if (!FA.Value.empty()) {
2829 if (A.size() <= PI)
2830 A.resize(PI + 1);
2831 A[PI] = FA.Value;
2832
2833 if (FALocs.size() <= PI)
2834 FALocs.resize(PI + 1);
2835
2836 FALocs[PI] = Lexer.getLoc();
2837 }
2838
2839 // At the end of the statement, fill in remaining arguments that have
2840 // default values. If there aren't any, then the next argument is
2841 // required but missing
2842 if (Lexer.is(AsmToken::EndOfStatement)) {
2843 bool Failure = false;
2844 for (unsigned FAI = 0; FAI < NParameters; ++FAI) {
2845 if (A[FAI].empty()) {
2846 if (M->Parameters[FAI].Required) {
2847 Error(FALocs[FAI].isValid() ? FALocs[FAI] : Lexer.getLoc(),
2848 "missing value for required parameter "
2849 "'" + M->Parameters[FAI].Name + "' in macro '" + M->Name + "'");
2850 Failure = true;
2851 }
2852
2853 if (!M->Parameters[FAI].Value.empty())
2854 A[FAI] = M->Parameters[FAI].Value;
2855 }
2856 }
2857 return Failure;
2858 }
2859
2860 if (Lexer.is(AsmToken::Comma))
2861 Lex();
2862 }
2863
2864 return TokError("too many positional arguments");
2865}
2866
2867bool AsmParser::handleMacroEntry(const MCAsmMacro *M, SMLoc NameLoc) {
2868 // Arbitrarily limit macro nesting depth (default matches 'as'). We can
2869 // eliminate this, although we should protect against infinite loops.
2870 unsigned MaxNestingDepth = AsmMacroMaxNestingDepth;
2871 if (ActiveMacros.size() == MaxNestingDepth) {
2872 std::ostringstream MaxNestingDepthError;
2873 MaxNestingDepthError << "macros cannot be nested more than "
2874 << MaxNestingDepth << " levels deep."
2875 << " Use -asm-macro-max-nesting-depth to increase "
2876 "this limit.";
2877 return TokError(MaxNestingDepthError.str());
2878 }
2879
2880 MCAsmMacroArguments A;
2881 if (parseMacroArguments(M, A))
2882 return true;
2883
2884 // Macro instantiation is lexical, unfortunately. We construct a new buffer
2885 // to hold the macro body with substitutions.
2886 SmallString<256> Buf;
2887 StringRef Body = M->Body;
2888 raw_svector_ostream OS(Buf);
2889
2890 if (expandMacro(OS, Body, M->Parameters, A, true, getTok().getLoc()))
2891 return true;
2892
2893 // We include the .endmacro in the buffer as our cue to exit the macro
2894 // instantiation.
2895 OS << ".endmacro\n";
2896
2897 std::unique_ptr<MemoryBuffer> Instantiation =
2898 MemoryBuffer::getMemBufferCopy(OS.str(), "<instantiation>");
2899
2900 // Create the macro instantiation object and add to the current macro
2901 // instantiation stack.
2902 MacroInstantiation *MI = new MacroInstantiation{
2903 NameLoc, CurBuffer, getTok().getLoc(), TheCondStack.size()};
2904 ActiveMacros.push_back(MI);
2905
2906 ++NumOfMacroInstantiations;
2907
2908 // Jump to the macro instantiation and prime the lexer.
2909 CurBuffer = SrcMgr.AddNewSourceBuffer(std::move(Instantiation), SMLoc());
2910 Lexer.setBuffer(SrcMgr.getMemoryBuffer(CurBuffer)->getBuffer());
2911 Lex();
2912
2913 return false;
2914}
2915
2916void AsmParser::handleMacroExit() {
2917 // Jump to the EndOfStatement we should return to, and consume it.
2918 jumpToLoc(ActiveMacros.back()->ExitLoc, ActiveMacros.back()->ExitBuffer);
2919 Lex();
2920
2921 // Pop the instantiation entry.
2922 delete ActiveMacros.back();
2923 ActiveMacros.pop_back();
2924}
2925
2926bool AsmParser::parseAssignment(StringRef Name, bool allow_redef,
2927 bool NoDeadStrip) {
2928 MCSymbol *Sym;
2929 const MCExpr *Value;
2930 if (MCParserUtils::parseAssignmentExpression(Name, allow_redef, *this, Sym,
2931 Value))
2932 return true;
2933
2934 if (!Sym) {
2935 // In the case where we parse an expression starting with a '.', we will
2936 // not generate an error, nor will we create a symbol. In this case we
2937 // should just return out.
2938 return false;
2939 }
2940
2941 if (discardLTOSymbol(Name))
2942 return false;
2943
2944 // Do the assignment.
2945 Out.emitAssignment(Sym, Value);
2946 if (NoDeadStrip)
2947 Out.emitSymbolAttribute(Sym, MCSA_NoDeadStrip);
2948
2949 return false;
2950}
2951
2952/// parseIdentifier:
2953/// ::= identifier
2954/// ::= string
2955bool AsmParser::parseIdentifier(StringRef &Res) {
2956 // The assembler has relaxed rules for accepting identifiers, in particular we
2957 // allow things like '.globl $foo' and '.def @feat.00', which would normally be
2958 // separate tokens. At this level, we have already lexed so we cannot (currently)
2959 // handle this as a context dependent token, instead we detect adjacent tokens
2960 // and return the combined identifier.
2961 if (Lexer.is(AsmToken::Dollar) || Lexer.is(AsmToken::At)) {
2962 SMLoc PrefixLoc = getLexer().getLoc();
2963
2964 // Consume the prefix character, and check for a following identifier.
2965
2966 AsmToken Buf[1];
2967 Lexer.peekTokens(Buf, false);
2968
2969 if (Buf[0].isNot(AsmToken::Identifier) && Buf[0].isNot(AsmToken::Integer))
2970 return true;
2971
2972 // We have a '$' or '@' followed by an identifier or integer token, make
2973 // sure they are adjacent.
2974 if (PrefixLoc.getPointer() + 1 != Buf[0].getLoc().getPointer())
2975 return true;
2976
2977 // eat $ or @
2978 Lexer.Lex(); // Lexer's Lex guarantees consecutive token.
2979 // Construct the joined identifier and consume the token.
2980 Res = StringRef(PrefixLoc.getPointer(), getTok().getString().size() + 1);
2981 Lex(); // Parser Lex to maintain invariants.
2982 return false;
2983 }
2984
2985 if (Lexer.isNot(AsmToken::Identifier) && Lexer.isNot(AsmToken::String))
2986 return true;
2987
2988 Res = getTok().getIdentifier();
2989
2990 Lex(); // Consume the identifier token.
2991
2992 return false;
2993}
2994
2995/// parseDirectiveSet:
2996/// ::= .equ identifier ',' expression
2997/// ::= .equiv identifier ',' expression
2998/// ::= .set identifier ',' expression
2999bool AsmParser::parseDirectiveSet(StringRef IDVal, bool allow_redef) {
3000 StringRef Name;
3001 if (check(parseIdentifier(Name), "expected identifier") || parseComma() ||
3002 parseAssignment(Name, allow_redef, true))
3003 return true;
3004 return false;
3005}
3006
3007bool AsmParser::parseEscapedString(std::string &Data) {
3008 if (check(getTok().isNot(AsmToken::String), "expected string"))
3009 return true;
3010
3011 Data = "";
3012 StringRef Str = getTok().getStringContents();
3013 for (unsigned i = 0, e = Str.size(); i != e; ++i) {
3014 if (Str[i] != '\\') {
3015 Data += Str[i];
3016 continue;
3017 }
3018
3019 // Recognize escaped characters. Note that this escape semantics currently
3020 // loosely follows Darwin 'as'.
3021 ++i;
3022 if (i == e)
3023 return TokError("unexpected backslash at end of string");
3024
3025 // Recognize hex sequences similarly to GNU 'as'.
3026 if (Str[i] == 'x' || Str[i] == 'X') {
3027 size_t length = Str.size();
3028 if (i + 1 >= length || !isHexDigit(Str[i + 1]))
3029 return TokError("invalid hexadecimal escape sequence");
3030
3031 // Consume hex characters. GNU 'as' reads all hexadecimal characters and
3032 // then truncates to the lower 16 bits. Seems reasonable.
3033 unsigned Value = 0;
3034 while (i + 1 < length && isHexDigit(Str[i + 1]))
3035 Value = Value * 16 + hexDigitValue(Str[++i]);
3036
3037 Data += (unsigned char)(Value & 0xFF);
3038 continue;
3039 }
3040
3041 // Recognize octal sequences.
3042 if ((unsigned)(Str[i] - '0') <= 7) {
3043 // Consume up to three octal characters.
3044 unsigned Value = Str[i] - '0';
3045
3046 if (i + 1 != e && ((unsigned)(Str[i + 1] - '0')) <= 7) {
3047 ++i;
3048 Value = Value * 8 + (Str[i] - '0');
3049
3050 if (i + 1 != e && ((unsigned)(Str[i + 1] - '0')) <= 7) {
3051 ++i;
3052 Value = Value * 8 + (Str[i] - '0');
3053 }
3054 }
3055
3056 if (Value > 255)
3057 return TokError("invalid octal escape sequence (out of range)");
3058
3059 Data += (unsigned char)Value;
3060 continue;
3061 }
3062
3063 // Otherwise recognize individual escapes.
3064 switch (Str[i]) {
3065 default:
3066 // Just reject invalid escape sequences for now.
3067 return TokError("invalid escape sequence (unrecognized character)");
3068
3069 case 'b': Data += '\b'; break;
3070 case 'f': Data += '\f'; break;
3071 case 'n': Data += '\n'; break;
3072 case 'r': Data += '\r'; break;
3073 case 't': Data += '\t'; break;
3074 case '"': Data += '"'; break;
3075 case '\\': Data += '\\'; break;
3076 }
3077 }
3078
3079 Lex();
3080 return false;
3081}
3082
3083bool AsmParser::parseAngleBracketString(std::string &Data) {
3084 SMLoc EndLoc, StartLoc = getTok().getLoc();
3085 if (isAngleBracketString(StartLoc, EndLoc)) {
3086 const char *StartChar = StartLoc.getPointer() + 1;
3087 const char *EndChar = EndLoc.getPointer() - 1;
3088 jumpToLoc(EndLoc, CurBuffer);
3089 /// Eat from '<' to '>'
3090 Lex();
3091
3092 Data = angleBracketString(StringRef(StartChar, EndChar - StartChar));
3093 return false;
3094 }
3095 return true;
3096}
3097
3098/// parseDirectiveAscii:
3099// ::= .ascii [ "string"+ ( , "string"+ )* ]
3100/// ::= ( .asciz | .string ) [ "string" ( , "string" )* ]
3101bool AsmParser::parseDirectiveAscii(StringRef IDVal, bool ZeroTerminated) {
3102 auto parseOp = [&]() -> bool {
3103 std::string Data;
3104 if (checkForValidSection())
3105 return true;
3106 // Only support spaces as separators for .ascii directive for now. See the
3107 // discusssion at https://reviews.llvm.org/D91460 for more details.
3108 do {
3109 if (parseEscapedString(Data))
3110 return true;
3111 getStreamer().emitBytes(Data);
3112 } while (!ZeroTerminated && getTok().is(AsmToken::String));
3113 if (ZeroTerminated)
3114 getStreamer().emitBytes(StringRef("\0", 1));
3115 return false;
3116 };
3117
3118 return parseMany(parseOp);
3119}
3120
3121/// parseDirectiveReloc
3122/// ::= .reloc expression , identifier [ , expression ]
3123bool AsmParser::parseDirectiveReloc(SMLoc DirectiveLoc) {
3124 const MCExpr *Offset;
3125 const MCExpr *Expr = nullptr;
3126 SMLoc OffsetLoc = Lexer.getTok().getLoc();
3127
3128 if (parseExpression(Offset))
3129 return true;
3130 if (parseComma() ||
3131 check(getTok().isNot(AsmToken::Identifier), "expected relocation name"))
3132 return true;
3133
3134 SMLoc NameLoc = Lexer.getTok().getLoc();
3135 StringRef Name = Lexer.getTok().getIdentifier();
3136 Lex();
3137
3138 if (Lexer.is(AsmToken::Comma)) {
3139 Lex();
3140 SMLoc ExprLoc = Lexer.getLoc();
3141 if (parseExpression(Expr))
3142 return true;
3143
3144 MCValue Value;
3145 if (!Expr->evaluateAsRelocatable(Value, nullptr, nullptr))
3146 return Error(ExprLoc, "expression must be relocatable");
3147 }
3148
3149 if (parseEOL())
3150 return true;
3151
3152 const MCTargetAsmParser &MCT = getTargetParser();
3153 const MCSubtargetInfo &STI = MCT.getSTI();
3154 if (Optional<std::pair<bool, std::string>> Err =
3155 getStreamer().emitRelocDirective(*Offset, Name, Expr, DirectiveLoc,
3156 STI))
3157 return Error(Err->first ? NameLoc : OffsetLoc, Err->second);
3158
3159 return false;
3160}
3161
3162/// parseDirectiveValue
3163/// ::= (.byte | .short | ... ) [ expression (, expression)* ]
3164bool AsmParser::parseDirectiveValue(StringRef IDVal, unsigned Size) {
3165 auto parseOp = [&]() -> bool {
3166 const MCExpr *Value;
3167 SMLoc ExprLoc = getLexer().getLoc();
3168 if (checkForValidSection() || parseExpression(Value))
3169 return true;
3170 // Special case constant expressions to match code generator.
3171 if (const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Value)) {
3172 assert(Size <= 8 && "Invalid size")(static_cast<void> (0));
3173 uint64_t IntValue = MCE->getValue();
3174 if (!isUIntN(8 * Size, IntValue) && !isIntN(8 * Size, IntValue))
3175 return Error(ExprLoc, "out of range literal value");
3176 getStreamer().emitIntValue(IntValue, Size);
3177 } else
3178 getStreamer().emitValue(Value, Size, ExprLoc);
3179 return false;
3180 };
3181
3182 return parseMany(parseOp);
3183}
3184
3185static bool parseHexOcta(AsmParser &Asm, uint64_t &hi, uint64_t &lo) {
3186 if (Asm.getTok().isNot(AsmToken::Integer) &&
3187 Asm.getTok().isNot(AsmToken::BigNum))
3188 return Asm.TokError("unknown token in expression");
3189 SMLoc ExprLoc = Asm.getTok().getLoc();
3190 APInt IntValue = Asm.getTok().getAPIntVal();
3191 Asm.Lex();
3192 if (!IntValue.isIntN(128))
3193 return Asm.Error(ExprLoc, "out of range literal value");
3194 if (!IntValue.isIntN(64)) {
3195 hi = IntValue.getHiBits(IntValue.getBitWidth() - 64).getZExtValue();
3196 lo = IntValue.getLoBits(64).getZExtValue();
3197 } else {
3198 hi = 0;
3199 lo = IntValue.getZExtValue();
3200 }
3201 return false;
3202}
3203
3204/// ParseDirectiveOctaValue
3205/// ::= .octa [ hexconstant (, hexconstant)* ]
3206
3207bool AsmParser::parseDirectiveOctaValue(StringRef IDVal) {
3208 auto parseOp = [&]() -> bool {
3209 if (checkForValidSection())
3210 return true;
3211 uint64_t hi, lo;
3212 if (parseHexOcta(*this, hi, lo))
3213 return true;
3214 if (MAI.isLittleEndian()) {
3215 getStreamer().emitInt64(lo);
3216 getStreamer().emitInt64(hi);
3217 } else {
3218 getStreamer().emitInt64(hi);
3219 getStreamer().emitInt64(lo);
3220 }
3221 return false;
3222 };
3223
3224 return parseMany(parseOp);
3225}
3226
3227bool AsmParser::parseRealValue(const fltSemantics &Semantics, APInt &Res) {
3228 // We don't truly support arithmetic on floating point expressions, so we
3229 // have to manually parse unary prefixes.
3230 bool IsNeg = false;
3231 if (getLexer().is(AsmToken::Minus)) {
3232 Lexer.Lex();
3233 IsNeg = true;
3234 } else if (getLexer().is(AsmToken::Plus))
3235 Lexer.Lex();
3236
3237 if (Lexer.is(AsmToken::Error))
3238 return TokError(Lexer.getErr());
3239 if (Lexer.isNot(AsmToken::Integer) && Lexer.isNot(AsmToken::Real) &&
3240 Lexer.isNot(AsmToken::Identifier))
3241 return TokError("unexpected token in directive");
3242
3243 // Convert to an APFloat.
3244 APFloat Value(Semantics);
3245 StringRef IDVal = getTok().getString();
3246 if (getLexer().is(AsmToken::Identifier)) {
3247 if (!IDVal.compare_insensitive("infinity") ||
3248 !IDVal.compare_insensitive("inf"))
3249 Value = APFloat::getInf(Semantics);
3250 else if (!IDVal.compare_insensitive("nan"))
3251 Value = APFloat::getNaN(Semantics, false, ~0);
3252 else
3253 return TokError("invalid floating point literal");
3254 } else if (errorToBool(
3255 Value.convertFromString(IDVal, APFloat::rmNearestTiesToEven)
3256 .takeError()))
3257 return TokError("invalid floating point literal");
3258 if (IsNeg)
3259 Value.changeSign();
3260
3261 // Consume the numeric token.
3262 Lex();
3263
3264 Res = Value.bitcastToAPInt();
3265
3266 return false;
3267}
3268
3269/// parseDirectiveRealValue
3270/// ::= (.single | .double) [ expression (, expression)* ]
3271bool AsmParser::parseDirectiveRealValue(StringRef IDVal,
3272 const fltSemantics &Semantics) {
3273 auto parseOp = [&]() -> bool {
3274 APInt AsInt;
3275 if (checkForValidSection() || parseRealValue(Semantics, AsInt))
3276 return true;
3277 getStreamer().emitIntValue(AsInt.getLimitedValue(),
3278 AsInt.getBitWidth() / 8);
3279 return false;
3280 };
3281
3282 return parseMany(parseOp);
3283}
3284
3285/// parseDirectiveZero
3286/// ::= .zero expression
3287bool AsmParser::parseDirectiveZero() {
3288 SMLoc NumBytesLoc = Lexer.getLoc();
3289 const MCExpr *NumBytes;
3290 if (checkForValidSection() || parseExpression(NumBytes))
3291 return true;
3292
3293 int64_t Val = 0;
3294 if (getLexer().is(AsmToken::Comma)) {
3295 Lex();
3296 if (parseAbsoluteExpression(Val))
3297 return true;
3298 }
3299
3300 if (parseEOL())
3301 return true;
3302 getStreamer().emitFill(*NumBytes, Val, NumBytesLoc);
3303
3304 return false;
3305}
3306
3307/// parseDirectiveFill
3308/// ::= .fill expression [ , expression [ , expression ] ]
3309bool AsmParser::parseDirectiveFill() {
3310 SMLoc NumValuesLoc = Lexer.getLoc();
3311 const MCExpr *NumValues;
3312 if (checkForValidSection() || parseExpression(NumValues))
3313 return true;
3314
3315 int64_t FillSize = 1;
3316 int64_t FillExpr = 0;
3317
3318 SMLoc SizeLoc, ExprLoc;
3319
3320 if (parseOptionalToken(AsmToken::Comma)) {
3321 SizeLoc = getTok().getLoc();
3322 if (parseAbsoluteExpression(FillSize))
3323 return true;
3324 if (parseOptionalToken(AsmToken::Comma)) {
3325 ExprLoc = getTok().getLoc();
3326 if (parseAbsoluteExpression(FillExpr))
3327 return true;
3328 }
3329 }
3330 if (parseEOL())
3331 return true;
3332
3333 if (FillSize < 0) {
3334 Warning(SizeLoc, "'.fill' directive with negative size has no effect");
3335 return false;
3336 }
3337 if (FillSize > 8) {
3338 Warning(SizeLoc, "'.fill' directive with size greater than 8 has been truncated to 8");
3339 FillSize = 8;
3340 }
3341
3342 if (!isUInt<32>(FillExpr) && FillSize > 4)
3343 Warning(ExprLoc, "'.fill' directive pattern has been truncated to 32-bits");
3344
3345 getStreamer().emitFill(*NumValues, FillSize, FillExpr, NumValuesLoc);
3346
3347 return false;
3348}
3349
3350/// parseDirectiveOrg
3351/// ::= .org expression [ , expression ]
3352bool AsmParser::parseDirectiveOrg() {
3353 const MCExpr *Offset;
3354 SMLoc OffsetLoc = Lexer.getLoc();
3355 if (checkForValidSection() || parseExpression(Offset))
3356 return true;
3357
3358 // Parse optional fill expression.
3359 int64_t FillExpr = 0;
3360 if (parseOptionalToken(AsmToken::Comma))
3361 if (parseAbsoluteExpression(FillExpr))
3362 return true;
3363 if (parseEOL())
3364 return true;
3365
3366 getStreamer().emitValueToOffset(Offset, FillExpr, OffsetLoc);
3367 return false;
3368}
3369
3370/// parseDirectiveAlign
3371/// ::= {.align, ...} expression [ , expression [ , expression ]]
3372bool AsmParser::parseDirectiveAlign(bool IsPow2, unsigned ValueSize) {
3373 SMLoc AlignmentLoc = getLexer().getLoc();
3374 int64_t Alignment;
3375 SMLoc MaxBytesLoc;
3376 bool HasFillExpr = false;
3377 int64_t FillExpr = 0;
3378 int64_t MaxBytesToFill = 0;
3379
3380 auto parseAlign = [&]() -> bool {
3381 if (parseAbsoluteExpression(Alignment))
3382 return true;
3383 if (parseOptionalToken(AsmToken::Comma)) {
3384 // The fill expression can be omitted while specifying a maximum number of
3385 // alignment bytes, e.g:
3386 // .align 3,,4
3387 if (getTok().isNot(AsmToken::Comma)) {
3388 HasFillExpr = true;
3389 if (parseAbsoluteExpression(FillExpr))
3390 return true;
3391 }
3392 if (parseOptionalToken(AsmToken::Comma))
3393 if (parseTokenLoc(MaxBytesLoc) ||
3394 parseAbsoluteExpression(MaxBytesToFill))
3395 return true;
3396 }
3397 return parseEOL();
3398 };
3399
3400 if (checkForValidSection())
3401 return true;
3402 // Ignore empty '.p2align' directives for GNU-as compatibility
3403 if (IsPow2 && (ValueSize == 1) && getTok().is(AsmToken::EndOfStatement)) {
3404 Warning(AlignmentLoc, "p2align directive with no operand(s) is ignored");
3405 return parseEOL();
3406 }
3407 if (parseAlign())
3408 return true;
3409
3410 // Always emit an alignment here even if we thrown an error.
3411 bool ReturnVal = false;
3412
3413 // Compute alignment in bytes.
3414 if (IsPow2) {
3415 // FIXME: Diagnose overflow.
3416 if (Alignment >= 32) {
3417 ReturnVal |= Error(AlignmentLoc, "invalid alignment value");
3418 Alignment = 31;
3419 }
3420
3421 Alignment = 1ULL << Alignment;
3422 } else {
3423 // Reject alignments that aren't either a power of two or zero,
3424 // for gas compatibility. Alignment of zero is silently rounded
3425 // up to one.
3426 if (Alignment == 0)
3427 Alignment = 1;
3428 if (!isPowerOf2_64(Alignment))
3429 ReturnVal |= Error(AlignmentLoc, "alignment must be a power of 2");
3430 if (!isUInt<32>(Alignment))
3431 ReturnVal |= Error(AlignmentLoc, "alignment must be smaller than 2**32");
3432 }
3433
3434 // Diagnose non-sensical max bytes to align.
3435 if (MaxBytesLoc.isValid()) {
3436 if (MaxBytesToFill < 1) {
3437 ReturnVal |= Error(MaxBytesLoc,
3438 "alignment directive can never be satisfied in this "
3439 "many bytes, ignoring maximum bytes expression");
3440 MaxBytesToFill = 0;
3441 }
3442
3443 if (MaxBytesToFill >= Alignment) {
3444 Warning(MaxBytesLoc, "maximum bytes expression exceeds alignment and "
3445 "has no effect");
3446 MaxBytesToFill = 0;
3447 }
3448 }
3449
3450 // Check whether we should use optimal code alignment for this .align
3451 // directive.
3452 const MCSection *Section = getStreamer().getCurrentSectionOnly();
3453 assert(Section && "must have section to emit alignment")(static_cast<void> (0));
3454 bool UseCodeAlign = Section->UseCodeAlign();
3455 if ((!HasFillExpr || Lexer.getMAI().getTextAlignFillValue() == FillExpr) &&
3456 ValueSize == 1 && UseCodeAlign) {
3457 getStreamer().emitCodeAlignment(Alignment, MaxBytesToFill);
3458 } else {
3459 // FIXME: Target specific behavior about how the "extra" bytes are filled.
3460 getStreamer().emitValueToAlignment(Alignment, FillExpr, ValueSize,
3461 MaxBytesToFill);
3462 }
3463
3464 return ReturnVal;
3465}
3466
3467/// parseDirectiveFile
3468/// ::= .file filename
3469/// ::= .file number [directory] filename [md5 checksum] [source source-text]
3470bool AsmParser::parseDirectiveFile(SMLoc DirectiveLoc) {
3471 // FIXME: I'm not sure what this is.
3472 int64_t FileNumber = -1;
3473 if (getLexer().is(AsmToken::Integer)) {
3474 FileNumber = getTok().getIntVal();
3475 Lex();
3476
3477 if (FileNumber < 0)
3478 return TokError("negative file number");
3479 }
3480
3481 std::string Path;
3482
3483 // Usually the directory and filename together, otherwise just the directory.
3484 // Allow the strings to have escaped octal character sequence.
3485 if (parseEscapedString(Path))
3486 return true;
3487
3488 StringRef Directory;
3489 StringRef Filename;
3490 std::string FilenameData;
3491 if (getLexer().is(AsmToken::String)) {
3492 if (check(FileNumber == -1,
3493 "explicit path specified, but no file number") ||
3494 parseEscapedString(FilenameData))
3495 return true;
3496 Filename = FilenameData;
3497 Directory = Path;
3498 } else {
3499 Filename = Path;
3500 }
3501
3502 uint64_t MD5Hi, MD5Lo;
3503 bool HasMD5 = false;
3504
3505 Optional<StringRef> Source;
3506 bool HasSource = false;
3507 std::string SourceString;
3508
3509 while (!parseOptionalToken(AsmToken::EndOfStatement)) {
3510 StringRef Keyword;
3511 if (check(getTok().isNot(AsmToken::Identifier),
3512 "unexpected token in '.file' directive") ||
3513 parseIdentifier(Keyword))
3514 return true;
3515 if (Keyword == "md5") {
3516 HasMD5 = true;
3517 if (check(FileNumber == -1,
3518 "MD5 checksum specified, but no file number") ||
3519 parseHexOcta(*this, MD5Hi, MD5Lo))
3520 return true;
3521 } else if (Keyword == "source") {
3522 HasSource = true;
3523 if (check(FileNumber == -1,
3524 "source specified, but no file number") ||
3525 check(getTok().isNot(AsmToken::String),
3526 "unexpected token in '.file' directive") ||
3527 parseEscapedString(SourceString))
3528 return true;
3529 } else {
3530 return TokError("unexpected token in '.file' directive");
3531 }
3532 }
3533
3534 if (FileNumber == -1) {
3535 // Ignore the directive if there is no number and the target doesn't support
3536 // numberless .file directives. This allows some portability of assembler
3537 // between different object file formats.
3538 if (getContext().getAsmInfo()->hasSingleParameterDotFile())
3539 getStreamer().emitFileDirective(Filename);
3540 } else {
3541 // In case there is a -g option as well as debug info from directive .file,
3542 // we turn off the -g option, directly use the existing debug info instead.
3543 // Throw away any implicit file table for the assembler source.
3544 if (Ctx.getGenDwarfForAssembly()) {
3545 Ctx.getMCDwarfLineTable(0).resetFileTable();
3546 Ctx.setGenDwarfForAssembly(false);
3547 }
3548
3549 Optional<MD5::MD5Result> CKMem;
3550 if (HasMD5) {
3551 MD5::MD5Result Sum;
3552 for (unsigned i = 0; i != 8; ++i) {
3553 Sum.Bytes[i] = uint8_t(MD5Hi >> ((7 - i) * 8));
3554 Sum.Bytes[i + 8] = uint8_t(MD5Lo >> ((7 - i) * 8));
3555 }
3556 CKMem = Sum;
3557 }
3558 if (HasSource) {
3559 char *SourceBuf = static_cast<char *>(Ctx.allocate(SourceString.size()));
3560 memcpy(SourceBuf, SourceString.data(), SourceString.size());
3561 Source = StringRef(SourceBuf, SourceString.size());
3562 }
3563 if (FileNumber == 0) {
3564 // Upgrade to Version 5 for assembly actions like clang -c a.s.
3565 if (Ctx.getDwarfVersion() < 5)
3566 Ctx.setDwarfVersion(5);
3567 getStreamer().emitDwarfFile0Directive(Directory, Filename, CKMem, Source);
3568 } else {
3569 Expected<unsigned> FileNumOrErr = getStreamer().tryEmitDwarfFileDirective(
3570 FileNumber, Directory, Filename, CKMem, Source);
3571 if (!FileNumOrErr)
3572 return Error(DirectiveLoc, toString(FileNumOrErr.takeError()));
3573 }
3574 // Alert the user if there are some .file directives with MD5 and some not.
3575 // But only do that once.
3576 if (!ReportedInconsistentMD5 && !Ctx.isDwarfMD5UsageConsistent(0)) {
3577 ReportedInconsistentMD5 = true;
3578 return Warning(DirectiveLoc, "inconsistent use of MD5 checksums");
3579 }
3580 }
3581
3582 return false;
3583}
3584
3585/// parseDirectiveLine
3586/// ::= .line [number]
3587bool AsmParser::parseDirectiveLine() {
3588 int64_t LineNumber;
3589 if (getLexer().is(AsmToken::Integer)) {
3590 if (parseIntToken(LineNumber, "unexpected token in '.line' directive"))
3591 return true;
3592 (void)LineNumber;
3593 // FIXME: Do something with the .line.
3594 }
3595 return parseEOL();
3596}
3597
3598/// parseDirectiveLoc
3599/// ::= .loc FileNumber [LineNumber] [ColumnPos] [basic_block] [prologue_end]
3600/// [epilogue_begin] [is_stmt VALUE] [isa VALUE]
3601/// The first number is a file number, must have been previously assigned with
3602/// a .file directive, the second number is the line number and optionally the
3603/// third number is a column position (zero if not specified). The remaining
3604/// optional items are .loc sub-directives.
3605bool AsmParser::parseDirectiveLoc() {
3606 int64_t FileNumber = 0, LineNumber = 0;
3607 SMLoc Loc = getTok().getLoc();
3608 if (parseIntToken(FileNumber, "unexpected token in '.loc' directive") ||
3609 check(FileNumber < 1 && Ctx.getDwarfVersion() < 5, Loc,
3610 "file number less than one in '.loc' directive") ||
3611 check(!getContext().isValidDwarfFileNumber(FileNumber), Loc,
3612 "unassigned file number in '.loc' directive"))
3613 return true;
3614
3615 // optional
3616 if (getLexer().is(AsmToken::Integer)) {
3617 LineNumber = getTok().getIntVal();
3618 if (LineNumber < 0)
3619 return TokError("line number less than zero in '.loc' directive");
3620 Lex();
3621 }
3622
3623 int64_t ColumnPos = 0;
3624 if (getLexer().is(AsmToken::Integer)) {
3625 ColumnPos = getTok().getIntVal();
3626 if (ColumnPos < 0)
3627 return TokError("column position less than zero in '.loc' directive");
3628 Lex();
3629 }
3630
3631 auto PrevFlags = getContext().getCurrentDwarfLoc().getFlags();
3632 unsigned Flags = PrevFlags & DWARF2_FLAG_IS_STMT(1 << 0);
3633 unsigned Isa = 0;
3634 int64_t Discriminator = 0;
3635
3636 auto parseLocOp = [&]() -> bool {
3637 StringRef Name;
3638 SMLoc Loc = getTok().getLoc();
3639 if (parseIdentifier(Name))
3640 return TokError("unexpected token in '.loc' directive");
3641
3642 if (Name == "basic_block")
3643 Flags |= DWARF2_FLAG_BASIC_BLOCK(1 << 1);
3644 else if (Name == "prologue_end")
3645 Flags |= DWARF2_FLAG_PROLOGUE_END(1 << 2);
3646 else if (Name == "epilogue_begin")
3647 Flags |= DWARF2_FLAG_EPILOGUE_BEGIN(1 << 3);
3648 else if (Name == "is_stmt") {
3649 Loc = getTok().getLoc();
3650 const MCExpr *Value;
3651 if (parseExpression(Value))
3652 return true;
3653 // The expression must be the constant 0 or 1.
3654 if (const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Value)) {
3655 int Value = MCE->getValue();
3656 if (Value == 0)
3657 Flags &= ~DWARF2_FLAG_IS_STMT(1 << 0);
3658 else if (Value == 1)
3659 Flags |= DWARF2_FLAG_IS_STMT(1 << 0);
3660 else
3661 return Error(Loc, "is_stmt value not 0 or 1");
3662 } else {
3663 return Error(Loc, "is_stmt value not the constant value of 0 or 1");
3664 }
3665 } else if (Name == "isa") {
3666 Loc = getTok().getLoc();
3667 const MCExpr *Value;
3668 if (parseExpression(Value))
3669 return true;
3670 // The expression must be a constant greater or equal to 0.
3671 if (const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Value)) {
3672 int Value = MCE->getValue();
3673 if (Value < 0)
3674 return Error(Loc, "isa number less than zero");
3675 Isa = Value;
3676 } else {
3677 return Error(Loc, "isa number not a constant value");
3678 }
3679 } else if (Name == "discriminator") {
3680 if (parseAbsoluteExpression(Discriminator))
3681 return true;
3682 } else {
3683 return Error(Loc, "unknown sub-directive in '.loc' directive");
3684 }
3685 return false;
3686 };
3687
3688 if (parseMany(parseLocOp, false /*hasComma*/))
3689 return true;
3690
3691 getStreamer().emitDwarfLocDirective(FileNumber, LineNumber, ColumnPos, Flags,
3692 Isa, Discriminator, StringRef());
3693
3694 return false;
3695}
3696
3697/// parseDirectiveStabs
3698/// ::= .stabs string, number, number, number
3699bool AsmParser::parseDirectiveStabs() {
3700 return TokError("unsupported directive '.stabs'");
3701}
3702
3703/// parseDirectiveCVFile
3704/// ::= .cv_file number filename [checksum] [checksumkind]
3705bool AsmParser::parseDirectiveCVFile() {
3706 SMLoc FileNumberLoc = getTok().getLoc();
3707 int64_t FileNumber;
3708 std::string Filename;
3709 std::string Checksum;
3710 int64_t ChecksumKind = 0;
3711
3712 if (parseIntToken(FileNumber,
3713 "expected file number in '.cv_file' directive") ||
3714 check(FileNumber < 1, FileNumberLoc, "file number less than one") ||
3715 check(getTok().isNot(AsmToken::String),
3716 "unexpected token in '.cv_file' directive") ||
3717 parseEscapedString(Filename))
3718 return true;
3719 if (!parseOptionalToken(AsmToken::EndOfStatement)) {
3720 if (check(getTok().isNot(AsmToken::String),
3721 "unexpected token in '.cv_file' directive") ||
3722 parseEscapedString(Checksum) ||
3723 parseIntToken(ChecksumKind,
3724 "expected checksum kind in '.cv_file' directive") ||
3725 parseToken(AsmToken::EndOfStatement,
3726 "unexpected token in '.cv_file' directive"))
3727 return true;
3728 }
3729
3730 Checksum = fromHex(Checksum);
3731 void *CKMem = Ctx.allocate(Checksum.size(), 1);
3732 memcpy(CKMem, Checksum.data(), Checksum.size());
3733 ArrayRef<uint8_t> ChecksumAsBytes(reinterpret_cast<const uint8_t *>(CKMem),
3734 Checksum.size());
3735
3736 if (!getStreamer().EmitCVFileDirective(FileNumber, Filename, ChecksumAsBytes,
3737 static_cast<uint8_t>(ChecksumKind)))
3738 return Error(FileNumberLoc, "file number already allocated");
3739
3740 return false;
3741}
3742
3743bool AsmParser::parseCVFunctionId(int64_t &FunctionId,
3744 StringRef DirectiveName) {
3745 SMLoc Loc;
3746 return parseTokenLoc(Loc) ||
3747 parseIntToken(FunctionId, "expected function id in '" + DirectiveName +
3748 "' directive") ||
3749 check(FunctionId < 0 || FunctionId >= UINT_MAX(2147483647 *2U +1U), Loc,
3750 "expected function id within range [0, UINT_MAX)");
3751}
3752
3753bool AsmParser::parseCVFileId(int64_t &FileNumber, StringRef DirectiveName) {
3754 SMLoc Loc;
3755 return parseTokenLoc(Loc) ||
3756 parseIntToken(FileNumber, "expected integer in '" + DirectiveName +
3757 "' directive") ||
3758 check(FileNumber < 1, Loc, "file number less than one in '" +
3759 DirectiveName + "' directive") ||
3760 check(!getCVContext().isValidFileNumber(FileNumber), Loc,
3761 "unassigned file number in '" + DirectiveName + "' directive");
3762}
3763
3764/// parseDirectiveCVFuncId
3765/// ::= .cv_func_id FunctionId
3766///
3767/// Introduces a function ID that can be used with .cv_loc.
3768bool AsmParser::parseDirectiveCVFuncId() {
3769 SMLoc FunctionIdLoc = getTok().getLoc();
3770 int64_t FunctionId;
3771
3772 if (parseCVFunctionId(FunctionId, ".cv_func_id") ||
3773 parseToken(AsmToken::EndOfStatement,
3774 "unexpected token in '.cv_func_id' directive"))
3775 return true;
3776
3777 if (!getStreamer().EmitCVFuncIdDirective(FunctionId))
3778 return Error(FunctionIdLoc, "function id already allocated");
3779
3780 return false;
3781}
3782
3783/// parseDirectiveCVInlineSiteId
3784/// ::= .cv_inline_site_id FunctionId
3785/// "within" IAFunc
3786/// "inlined_at" IAFile IALine [IACol]
3787///
3788/// Introduces a function ID that can be used with .cv_loc. Includes "inlined
3789/// at" source location information for use in the line table of the caller,
3790/// whether the caller is a real function or another inlined call site.
3791bool AsmParser::parseDirectiveCVInlineSiteId() {
3792 SMLoc FunctionIdLoc = getTok().getLoc();
3793 int64_t FunctionId;
3794 int64_t IAFunc;
3795 int64_t IAFile;
3796 int64_t IALine;
3797 int64_t IACol = 0;
3798
3799 // FunctionId
3800 if (parseCVFunctionId(FunctionId, ".cv_inline_site_id"))
3801 return true;
3802
3803 // "within"
3804 if (check((getLexer().isNot(AsmToken::Identifier) ||
3805 getTok().getIdentifier() != "within"),
3806 "expected 'within' identifier in '.cv_inline_site_id' directive"))
3807 return true;
3808 Lex();
3809
3810 // IAFunc
3811 if (parseCVFunctionId(IAFunc, ".cv_inline_site_id"))
3812 return true;
3813
3814 // "inlined_at"
3815 if (check((getLexer().isNot(AsmToken::Identifier) ||
3816 getTok().getIdentifier() != "inlined_at"),
3817 "expected 'inlined_at' identifier in '.cv_inline_site_id' "
3818 "directive") )
3819 return true;
3820 Lex();
3821
3822 // IAFile IALine
3823 if (parseCVFileId(IAFile, ".cv_inline_site_id") ||
3824 parseIntToken(IALine, "expected line number after 'inlined_at'"))
3825 return true;
3826
3827 // [IACol]
3828 if (getLexer().is(AsmToken::Integer)) {
3829 IACol = getTok().getIntVal();
3830 Lex();
3831 }
3832
3833 if (parseToken(AsmToken::EndOfStatement,
3834 "unexpected token in '.cv_inline_site_id' directive"))
3835 return true;
3836
3837 if (!getStreamer().EmitCVInlineSiteIdDirective(FunctionId, IAFunc, IAFile,
3838 IALine, IACol, FunctionIdLoc))
3839 return Error(FunctionIdLoc, "function id already allocated");
3840
3841 return false;
3842}
3843
3844/// parseDirectiveCVLoc
3845/// ::= .cv_loc FunctionId FileNumber [LineNumber] [ColumnPos] [prologue_end]
3846/// [is_stmt VALUE]
3847/// The first number is a file number, must have been previously assigned with
3848/// a .file directive, the second number is the line number and optionally the
3849/// third number is a column position (zero if not specified). The remaining
3850/// optional items are .loc sub-directives.
3851bool AsmParser::parseDirectiveCVLoc() {
3852 SMLoc DirectiveLoc = getTok().getLoc();
3853 int64_t FunctionId, FileNumber;
3854 if (parseCVFunctionId(FunctionId, ".cv_loc") ||
3855 parseCVFileId(FileNumber, ".cv_loc"))
3856 return true;
3857
3858 int64_t LineNumber = 0;
3859 if (getLexer().is(AsmToken::Integer)) {
3860 LineNumber = getTok().getIntVal();
3861 if (LineNumber < 0)
3862 return TokError("line number less than zero in '.cv_loc' directive");
3863 Lex();
3864 }
3865
3866 int64_t ColumnPos = 0;
3867 if (getLexer().is(AsmToken::Integer)) {
3868 ColumnPos = getTok().getIntVal();
3869 if (ColumnPos < 0)
3870 return TokError("column position less than zero in '.cv_loc' directive");
3871 Lex();
3872 }
3873
3874 bool PrologueEnd = false;
3875 uint64_t IsStmt = 0;
3876
3877 auto parseOp = [&]() -> bool {
3878 StringRef Name;
3879 SMLoc Loc = getTok().getLoc();
3880 if (parseIdentifier(Name))
3881 return TokError("unexpected token in '.cv_loc' directive");
3882 if (Name == "prologue_end")
3883 PrologueEnd = true;
3884 else if (Name == "is_stmt") {
3885 Loc = getTok().getLoc();
3886 const MCExpr *Value;
3887 if (parseExpression(Value))
3888 return true;
3889 // The expression must be the constant 0 or 1.
3890 IsStmt = ~0ULL;
3891 if (const auto *MCE = dyn_cast<MCConstantExpr>(Value))
3892 IsStmt = MCE->getValue();
3893
3894 if (IsStmt > 1)
3895 return Error(Loc, "is_stmt value not 0 or 1");
3896 } else {
3897 return Error(Loc, "unknown sub-directive in '.cv_loc' directive");
3898 }
3899 return false;
3900 };
3901
3902 if (parseMany(parseOp, false /*hasComma*/))
3903 return true;
3904
3905 getStreamer().emitCVLocDirective(FunctionId, FileNumber, LineNumber,
3906 ColumnPos, PrologueEnd, IsStmt, StringRef(),
3907 DirectiveLoc);
3908 return false;
3909}
3910
3911/// parseDirectiveCVLinetable
3912/// ::= .cv_linetable FunctionId, FnStart, FnEnd
3913bool AsmParser::parseDirectiveCVLinetable() {
3914 int64_t FunctionId;
3915 StringRef FnStartName, FnEndName;
3916 SMLoc Loc = getTok().getLoc();
3917 if (parseCVFunctionId(FunctionId, ".cv_linetable") || parseComma() ||
3918 parseTokenLoc(Loc) ||
3919 check(parseIdentifier(FnStartName), Loc,
3920 "expected identifier in directive") ||
3921 parseComma() || parseTokenLoc(Loc) ||
3922 check(parseIdentifier(FnEndName), Loc,
3923 "expected identifier in directive"))
3924 return true;
3925
3926 MCSymbol *FnStartSym = getContext().getOrCreateSymbol(FnStartName);
3927 MCSymbol *FnEndSym = getContext().getOrCreateSymbol(FnEndName);
3928
3929 getStreamer().emitCVLinetableDirective(FunctionId, FnStartSym, FnEndSym);
3930 return false;
3931}
3932
3933/// parseDirectiveCVInlineLinetable
3934/// ::= .cv_inline_linetable PrimaryFunctionId FileId LineNum FnStart FnEnd
3935bool AsmParser::parseDirectiveCVInlineLinetable() {
3936 int64_t PrimaryFunctionId, SourceFileId, SourceLineNum;
3937 StringRef FnStartName, FnEndName;
3938 SMLoc Loc = getTok().getLoc();
3939 if (parseCVFunctionId(PrimaryFunctionId, ".cv_inline_linetable") ||
3940 parseTokenLoc(Loc) ||
3941 parseIntToken(
3942 SourceFileId,
3943 "expected SourceField in '.cv_inline_linetable' directive") ||
3944 check(SourceFileId <= 0, Loc,
3945 "File id less than zero in '.cv_inline_linetable' directive") ||
3946 parseTokenLoc(Loc) ||
3947 parseIntToken(
3948 SourceLineNum,
3949 "expected SourceLineNum in '.cv_inline_linetable' directive") ||
3950 check(SourceLineNum < 0, Loc,
3951 "Line number less than zero in '.cv_inline_linetable' directive") ||
3952 parseTokenLoc(Loc) || check(parseIdentifier(FnStartName), Loc,
3953 "expected identifier in directive") ||
3954 parseTokenLoc(Loc) || check(parseIdentifier(FnEndName), Loc,
3955 "expected identifier in directive"))
3956 return true;
3957
3958 if (parseToken(AsmToken::EndOfStatement, "Expected End of Statement"))
3959 return true;
3960
3961 MCSymbol *FnStartSym = getContext().getOrCreateSymbol(FnStartName);
3962 MCSymbol *FnEndSym = getContext().getOrCreateSymbol(FnEndName);
3963 getStreamer().emitCVInlineLinetableDirective(PrimaryFunctionId, SourceFileId,
3964 SourceLineNum, FnStartSym,
3965 FnEndSym);
3966 return false;
3967}
3968
3969void AsmParser::initializeCVDefRangeTypeMap() {
3970 CVDefRangeTypeMap["reg"] = CVDR_DEFRANGE_REGISTER;
3971 CVDefRangeTypeMap["frame_ptr_rel"] = CVDR_DEFRANGE_FRAMEPOINTER_REL;
3972 CVDefRangeTypeMap["subfield_reg"] = CVDR_DEFRANGE_SUBFIELD_REGISTER;
3973 CVDefRangeTypeMap["reg_rel"] = CVDR_DEFRANGE_REGISTER_REL;
3974}
3975
3976/// parseDirectiveCVDefRange
3977/// ::= .cv_def_range RangeStart RangeEnd (GapStart GapEnd)*, bytes*
3978bool AsmParser::parseDirectiveCVDefRange() {
3979 SMLoc Loc;
3980 std::vector<std::pair<const MCSymbol *, const MCSymbol *>> Ranges;
3981 while (getLexer().is(AsmToken::Identifier)) {
3982 Loc = getLexer().getLoc();
3983 StringRef GapStartName;
3984 if (parseIdentifier(GapStartName))
3985 return Error(Loc, "expected identifier in directive");
3986 MCSymbol *GapStartSym = getContext().getOrCreateSymbol(GapStartName);
3987
3988 Loc = getLexer().getLoc();
3989 StringRef GapEndName;
3990 if (parseIdentifier(GapEndName))
3991 return Error(Loc, "expected identifier in directive");
3992 MCSymbol *GapEndSym = getContext().getOrCreateSymbol(GapEndName);
3993
3994 Ranges.push_back({GapStartSym, GapEndSym});
3995 }
3996
3997 StringRef CVDefRangeTypeStr;
3998 if (parseToken(
3999 AsmToken::Comma,
4000 "expected comma before def_range type in .cv_def_range directive") ||
4001 parseIdentifier(CVDefRangeTypeStr))
4002 return Error(Loc, "expected def_range type in directive");
4003
4004 StringMap<CVDefRangeType>::const_iterator CVTypeIt =
4005 CVDefRangeTypeMap.find(CVDefRangeTypeStr);
4006 CVDefRangeType CVDRType = (CVTypeIt == CVDefRangeTypeMap.end())
4007 ? CVDR_DEFRANGE
4008 : CVTypeIt->getValue();
4009 switch (CVDRType) {
4010 case CVDR_DEFRANGE_REGISTER: {
4011 int64_t DRRegister;
4012 if (parseToken(AsmToken::Comma, "expected comma before register number in "
4013 ".cv_def_range directive") ||
4014 parseAbsoluteExpression(DRRegister))
4015 return Error(Loc, "expected register number");
4016
4017 codeview::DefRangeRegisterHeader DRHdr;
4018 DRHdr.Register = DRRegister;
4019 DRHdr.MayHaveNoName = 0;
4020 getStreamer().emitCVDefRangeDirective(Ranges, DRHdr);
4021 break;
4022 }
4023 case CVDR_DEFRANGE_FRAMEPOINTER_REL: {
4024 int64_t DROffset;
4025 if (parseToken(AsmToken::Comma,
4026 "expected comma before offset in .cv_def_range directive") ||
4027 parseAbsoluteExpression(DROffset))
4028 return Error(Loc, "expected offset value");
4029
4030 codeview::DefRangeFramePointerRelHeader DRHdr;
4031 DRHdr.Offset = DROffset;
4032 getStreamer().emitCVDefRangeDirective(Ranges, DRHdr);
4033 break;
4034 }
4035 case CVDR_DEFRANGE_SUBFIELD_REGISTER: {
4036 int64_t DRRegister;
4037 int64_t DROffsetInParent;
4038 if (parseToken(AsmToken::Comma, "expected comma before register number in "
4039 ".cv_def_range directive") ||
4040 parseAbsoluteExpression(DRRegister))
4041 return Error(Loc, "expected register number");
4042 if (parseToken(AsmToken::Comma,
4043 "expected comma before offset in .cv_def_range directive") ||
4044 parseAbsoluteExpression(DROffsetInParent))
4045 return Error(Loc, "expected offset value");
4046
4047 codeview::DefRangeSubfieldRegisterHeader DRHdr;
4048 DRHdr.Register = DRRegister;
4049 DRHdr.MayHaveNoName = 0;
4050 DRHdr.OffsetInParent = DROffsetInParent;
4051 getStreamer().emitCVDefRangeDirective(Ranges, DRHdr);
4052 break;
4053 }
4054 case CVDR_DEFRANGE_REGISTER_REL: {
4055 int64_t DRRegister;
4056 int64_t DRFlags;
4057 int64_t DRBasePointerOffset;
4058 if (parseToken(AsmToken::Comma, "expected comma before register number in "
4059 ".cv_def_range directive") ||
4060 parseAbsoluteExpression(DRRegister))
4061 return Error(Loc, "expected register value");
4062 if (parseToken(
4063 AsmToken::Comma,
4064 "expected comma before flag value in .cv_def_range directive") ||
4065 parseAbsoluteExpression(DRFlags))
4066 return Error(Loc, "expected flag value");
4067 if (parseToken(AsmToken::Comma, "expected comma before base pointer offset "
4068 "in .cv_def_range directive") ||
4069 parseAbsoluteExpression(DRBasePointerOffset))
4070 return Error(Loc, "expected base pointer offset value");
4071
4072 codeview::DefRangeRegisterRelHeader DRHdr;
4073 DRHdr.Register = DRRegister;
4074 DRHdr.Flags = DRFlags;
4075 DRHdr.BasePointerOffset = DRBasePointerOffset;
4076 getStreamer().emitCVDefRangeDirective(Ranges, DRHdr);
4077 break;
4078 }
4079 default:
4080 return Error(Loc, "unexpected def_range type in .cv_def_range directive");
4081 }
4082 return true;
4083}
4084
4085/// parseDirectiveCVString
4086/// ::= .cv_stringtable "string"
4087bool AsmParser::parseDirectiveCVString() {
4088 std::string Data;
4089 if (checkForValidSection() || parseEscapedString(Data))
4090 return true;
4091
4092 // Put the string in the table and emit the offset.
4093 std::pair<StringRef, unsigned> Insertion =
4094 getCVContext().addToStringTable(Data);
4095 getStreamer().emitInt32(Insertion.second);
4096 return false;
4097}
4098
4099/// parseDirectiveCVStringTable
4100/// ::= .cv_stringtable
4101bool AsmParser::parseDirectiveCVStringTable() {
4102 getStreamer().emitCVStringTableDirective();
4103 return false;
4104}
4105
4106/// parseDirectiveCVFileChecksums
4107/// ::= .cv_filechecksums
4108bool AsmParser::parseDirectiveCVFileChecksums() {
4109 getStreamer().emitCVFileChecksumsDirective();
4110 return false;
4111}
4112
4113/// parseDirectiveCVFileChecksumOffset
4114/// ::= .cv_filechecksumoffset fileno
4115bool AsmParser::parseDirectiveCVFileChecksumOffset() {
4116 int64_t FileNo;
4117 if (parseIntToken(FileNo, "expected identifier in directive"))
4118 return true;
4119 if (parseToken(AsmToken::EndOfStatement, "Expected End of Statement"))
4120 return true;
4121 getStreamer().emitCVFileChecksumOffsetDirective(FileNo);
4122 return false;
4123}
4124
4125/// parseDirectiveCVFPOData
4126/// ::= .cv_fpo_data procsym
4127bool AsmParser::parseDirectiveCVFPOData() {
4128 SMLoc DirLoc = getLexer().getLoc();
4129 StringRef ProcName;
4130 if (parseIdentifier(ProcName))
4131 return TokError("expected symbol name");
4132 if (parseEOL())
4133 return true;
4134 MCSymbol *ProcSym = getContext().getOrCreateSymbol(ProcName);
4135 getStreamer().EmitCVFPOData(ProcSym, DirLoc);
4136 return false;
4137}
4138
4139/// parseDirectiveCFISections
4140/// ::= .cfi_sections section [, section]
4141bool AsmParser::parseDirectiveCFISections() {
4142 StringRef Name;
4143 bool EH = false;
4144 bool Debug = false;
4145
4146 if (!parseOptionalToken(AsmToken::EndOfStatement)) {
4147 for (;;) {
4148 if (parseIdentifier(Name))
4149 return TokError("expected .eh_frame or .debug_frame");
4150 if (Name == ".eh_frame")
4151 EH = true;
4152 else if (Name == ".debug_frame")
4153 Debug = true;
4154 if (parseOptionalToken(AsmToken::EndOfStatement))
4155 break;
4156 if (parseComma())
4157 return true;
4158 }
4159 }
4160 getStreamer().emitCFISections(EH, Debug);
4161 return false;
4162}
4163
4164/// parseDirectiveCFIStartProc
4165/// ::= .cfi_startproc [simple]
4166bool AsmParser::parseDirectiveCFIStartProc() {
4167 StringRef Simple;
4168 if (!parseOptionalToken(AsmToken::EndOfStatement)) {
4169 if (check(parseIdentifier(Simple) || Simple != "simple",
4170 "unexpected token") ||
4171 parseEOL())
4172 return true;
4173 }
4174
4175 // TODO(kristina): Deal with a corner case of incorrect diagnostic context
4176 // being produced if this directive is emitted as part of preprocessor macro
4177 // expansion which can *ONLY* happen if Clang's cc1as is the API consumer.
4178 // Tools like llvm-mc on the other hand are not affected by it, and report
4179 // correct context information.
4180 getStreamer().emitCFIStartProc(!Simple.empty(), Lexer.getLoc());
4181 return false;
4182}
4183
4184/// parseDirectiveCFIEndProc
4185/// ::= .cfi_endproc
4186bool AsmParser::parseDirectiveCFIEndProc() {
4187 if (parseEOL())
4188 return true;
4189 getStreamer().emitCFIEndProc();
4190 return false;
4191}
4192
4193/// parse register name or number.
4194bool AsmParser::parseRegisterOrRegisterNumber(int64_t &Register,
4195 SMLoc DirectiveLoc) {
4196 unsigned RegNo;
4197
4198 if (getLexer().isNot(AsmToken::Integer)) {
4199 if (getTargetParser().ParseRegister(RegNo, DirectiveLoc, DirectiveLoc))
4200 return true;
4201 Register = getContext().getRegisterInfo()->getDwarfRegNum(RegNo, true);
4202 } else
4203 return parseAbsoluteExpression(Register);
4204
4205 return false;
4206}
4207
4208/// parseDirectiveCFIDefCfa
4209/// ::= .cfi_def_cfa register, offset
4210bool AsmParser::parseDirectiveCFIDefCfa(SMLoc DirectiveLoc) {
4211 int64_t Register = 0, Offset = 0;
4212 if (parseRegisterOrRegisterNumber(Register, DirectiveLoc) || parseComma() ||
4213 parseAbsoluteExpression(Offset) || parseEOL())
4214 return true;
4215
4216 getStreamer().emitCFIDefCfa(Register, Offset);
4217 return false;
4218}
4219
4220/// parseDirectiveCFIDefCfaOffset
4221/// ::= .cfi_def_cfa_offset offset
4222bool AsmParser::parseDirectiveCFIDefCfaOffset() {
4223 int64_t Offset = 0;
4224 if (parseAbsoluteExpression(Offset) || parseEOL())
4225 return true;
4226
4227 getStreamer().emitCFIDefCfaOffset(Offset);
4228 return false;
4229}
4230
4231/// parseDirectiveCFIRegister
4232/// ::= .cfi_register register, register
4233bool AsmParser::parseDirectiveCFIRegister(SMLoc DirectiveLoc) {
4234 int64_t Register1 = 0, Register2 = 0;
4235 if (parseRegisterOrRegisterNumber(Register1, DirectiveLoc) || parseComma() ||
4236 parseRegisterOrRegisterNumber(Register2, DirectiveLoc) || parseEOL())
4237 return true;
4238
4239 getStreamer().emitCFIRegister(Register1, Register2);
4240 return false;
4241}
4242
4243/// parseDirectiveCFIWindowSave
4244/// ::= .cfi_window_save
4245bool AsmParser::parseDirectiveCFIWindowSave() {
4246 if (parseEOL())
4247 return true;
4248 getStreamer().emitCFIWindowSave();
4249 return false;
4250}
4251
4252/// parseDirectiveCFIAdjustCfaOffset
4253/// ::= .cfi_adjust_cfa_offset adjustment
4254bool AsmParser::parseDirectiveCFIAdjustCfaOffset() {
4255 int64_t Adjustment = 0;
4256 if (parseAbsoluteExpression(Adjustment) || parseEOL())
4257 return true;
4258
4259 getStreamer().emitCFIAdjustCfaOffset(Adjustment);
4260 return false;
4261}
4262
4263/// parseDirectiveCFIDefCfaRegister
4264/// ::= .cfi_def_cfa_register register
4265bool AsmParser::parseDirectiveCFIDefCfaRegister(SMLoc DirectiveLoc) {
4266 int64_t Register = 0;
4267 if (parseRegisterOrRegisterNumber(Register, DirectiveLoc) || parseEOL())
4268 return true;
4269
4270 getStreamer().emitCFIDefCfaRegister(Register);
4271 return false;
4272}
4273
4274/// parseDirectiveCFILLVMDefAspaceCfa
4275/// ::= .cfi_llvm_def_aspace_cfa register, offset, address_space
4276bool AsmParser::parseDirectiveCFILLVMDefAspaceCfa(SMLoc DirectiveLoc) {
4277 int64_t Register = 0, Offset = 0, AddressSpace = 0;
4278 if (parseRegisterOrRegisterNumber(Register, DirectiveLoc) || parseComma() ||
4279 parseAbsoluteExpression(Offset) || parseComma() ||
4280 parseAbsoluteExpression(AddressSpace) || parseEOL())
4281 return true;
4282
4283 getStreamer().emitCFILLVMDefAspaceCfa(Register, Offset, AddressSpace);
4284 return false;
4285}
4286
4287/// parseDirectiveCFIOffset
4288/// ::= .cfi_offset register, offset
4289bool AsmParser::parseDirectiveCFIOffset(SMLoc DirectiveLoc) {
4290 int64_t Register = 0;
4291 int64_t Offset = 0;
4292
4293 if (parseRegisterOrRegisterNumber(Register, DirectiveLoc) || parseComma() ||
4294 parseAbsoluteExpression(Offset) || parseEOL())
4295 return true;
4296
4297 getStreamer().emitCFIOffset(Register, Offset);
4298 return false;
4299}
4300
4301/// parseDirectiveCFIRelOffset
4302/// ::= .cfi_rel_offset register, offset
4303bool AsmParser::parseDirectiveCFIRelOffset(SMLoc DirectiveLoc) {
4304 int64_t Register = 0, Offset = 0;
4305
4306 if (parseRegisterOrRegisterNumber(Register, DirectiveLoc) || parseComma() ||
4307 parseAbsoluteExpression(Offset) || parseEOL())
4308 return true;
4309
4310 getStreamer().emitCFIRelOffset(Register, Offset);
4311 return false;
4312}
4313
4314static bool isValidEncoding(int64_t Encoding) {
4315 if (Encoding & ~0xff)
4316 return false;
4317
4318 if (Encoding == dwarf::DW_EH_PE_omit)
4319 return true;
4320
4321 const unsigned Format = Encoding & 0xf;
4322 if (Format != dwarf::DW_EH_PE_absptr && Format != dwarf::DW_EH_PE_udata2 &&
4323 Format != dwarf::DW_EH_PE_udata4 && Format != dwarf::DW_EH_PE_udata8 &&
4324 Format != dwarf::DW_EH_PE_sdata2 && Format != dwarf::DW_EH_PE_sdata4 &&
4325 Format != dwarf::DW_EH_PE_sdata8 && Format != dwarf::DW_EH_PE_signed)
4326 return false;
4327
4328 const unsigned Application = Encoding & 0x70;
4329 if (Application != dwarf::DW_EH_PE_absptr &&
4330 Application != dwarf::DW_EH_PE_pcrel)
4331 return false;
4332
4333 return true;
4334}
4335
4336/// parseDirectiveCFIPersonalityOrLsda
4337/// IsPersonality true for cfi_personality, false for cfi_lsda
4338/// ::= .cfi_personality encoding, [symbol_name]
4339/// ::= .cfi_lsda encoding, [symbol_name]
4340bool AsmParser::parseDirectiveCFIPersonalityOrLsda(bool IsPersonality) {
4341 int64_t Encoding = 0;
4342 if (parseAbsoluteExpression(Encoding))
4343 return true;
4344 if (Encoding == dwarf::DW_EH_PE_omit)
4345 return false;
4346
4347 StringRef Name;
4348 if (check(!isValidEncoding(Encoding), "unsupported encoding.") ||
4349 parseComma() ||
4350 check(parseIdentifier(Name), "expected identifier in directive") ||
4351 parseEOL())
4352 return true;
4353
4354 MCSymbol *Sym = getContext().getOrCreateSymbol(Name);
4355
4356 if (IsPersonality)
4357 getStreamer().emitCFIPersonality(Sym, Encoding);
4358 else
4359 getStreamer().emitCFILsda(Sym, Encoding);
4360 return false;
4361}
4362
4363/// parseDirectiveCFIRememberState
4364/// ::= .cfi_remember_state
4365bool AsmParser::parseDirectiveCFIRememberState() {
4366 if (parseEOL())
4367 return true;
4368 getStreamer().emitCFIRememberState();
4369 return false;
4370}
4371
4372/// parseDirectiveCFIRestoreState
4373/// ::= .cfi_remember_state
4374bool AsmParser::parseDirectiveCFIRestoreState() {
4375 if (parseEOL())
4376 return true;
4377 getStreamer().emitCFIRestoreState();
4378 return false;
4379}
4380
4381/// parseDirectiveCFISameValue
4382/// ::= .cfi_same_value register
4383bool AsmParser::parseDirectiveCFISameValue(SMLoc DirectiveLoc) {
4384 int64_t Register = 0;
4385
4386 if (parseRegisterOrRegisterNumber(Register, DirectiveLoc) || parseEOL())
4387 return true;
4388
4389 getStreamer().emitCFISameValue(Register);
4390 return false;
4391}
4392
4393/// parseDirectiveCFIRestore
4394/// ::= .cfi_restore register
4395bool AsmParser::parseDirectiveCFIRestore(SMLoc DirectiveLoc) {
4396 int64_t Register = 0;
4397 if (parseRegisterOrRegisterNumber(Register, DirectiveLoc) || parseEOL())
4398 return true;
4399
4400 getStreamer().emitCFIRestore(Register);
4401 return false;
4402}
4403
4404/// parseDirectiveCFIEscape
4405/// ::= .cfi_escape expression[,...]
4406bool AsmParser::parseDirectiveCFIEscape() {
4407 std::string Values;
4408 int64_t CurrValue;
4409 if (parseAbsoluteExpression(CurrValue))
4410 return true;
4411
4412 Values.push_back((uint8_t)CurrValue);
4413
4414 while (getLexer().is(AsmToken::Comma)) {
4415 Lex();
4416
4417 if (parseAbsoluteExpression(CurrValue))
4418 return true;
4419
4420 Values.push_back((uint8_t)CurrValue);
4421 }
4422
4423 getStreamer().emitCFIEscape(Values);
4424 return false;
4425}
4426
4427/// parseDirectiveCFIReturnColumn
4428/// ::= .cfi_return_column register
4429bool AsmParser::parseDirectiveCFIReturnColumn(SMLoc DirectiveLoc) {
4430 int64_t Register = 0;
4431 if (parseRegisterOrRegisterNumber(Register, DirectiveLoc) || parseEOL())
4432 return true;
4433 getStreamer().emitCFIReturnColumn(Register);
4434 return false;
4435}
4436
4437/// parseDirectiveCFISignalFrame
4438/// ::= .cfi_signal_frame
4439bool AsmParser::parseDirectiveCFISignalFrame() {
4440 if (parseEOL())
4441 return true;
4442
4443 getStreamer().emitCFISignalFrame();
4444 return false;
4445}
4446
4447/// parseDirectiveCFIUndefined
4448/// ::= .cfi_undefined register
4449bool AsmParser::parseDirectiveCFIUndefined(SMLoc DirectiveLoc) {
4450 int64_t Register = 0;
4451
4452 if (parseRegisterOrRegisterNumber(Register, DirectiveLoc) || parseEOL())
4453 return true;
4454
4455 getStreamer().emitCFIUndefined(Register);
4456 return false;
4457}
4458
4459/// parseDirectiveAltmacro
4460/// ::= .altmacro
4461/// ::= .noaltmacro
4462bool AsmParser::parseDirectiveAltmacro(StringRef Directive) {
4463 if (parseEOL())
4464 return true;
4465 AltMacroMode = (Directive == ".altmacro");
4466 return false;
4467}
4468
4469/// parseDirectiveMacrosOnOff
4470/// ::= .macros_on
4471/// ::= .macros_off
4472bool AsmParser::parseDirectiveMacrosOnOff(StringRef Directive) {
4473 if (parseEOL())
4474 return true;
4475 setMacrosEnabled(Directive == ".macros_on");
4476 return false;
4477}
4478
4479/// parseDirectiveMacro
4480/// ::= .macro name[,] [parameters]
4481bool AsmParser::parseDirectiveMacro(SMLoc DirectiveLoc) {
4482 StringRef Name;
4483 if (parseIdentifier(Name))
4484 return TokError("expected identifier in '.macro' directive");
4485
4486 if (getLexer().is(AsmToken::Comma))
4487 Lex();
4488
4489 MCAsmMacroParameters Parameters;
4490 while (getLexer().isNot(AsmToken::EndOfStatement)) {
4491
4492 if (!Parameters.empty() && Parameters.back().Vararg)
4493 return Error(Lexer.getLoc(), "vararg parameter '" +
4494 Parameters.back().Name +
4495 "' should be the last parameter");
4496
4497 MCAsmMacroParameter Parameter;
4498 if (parseIdentifier(Parameter.Name))
4499 return TokError("expected identifier in '.macro' directive");
4500
4501 // Emit an error if two (or more) named parameters share the same name
4502 for (const MCAsmMacroParameter& CurrParam : Parameters)
4503 if (CurrParam.Name.equals(Parameter.Name))
4504 return TokError("macro '" + Name + "' has multiple parameters"
4505 " named '" + Parameter.Name + "'");
4506
4507 if (Lexer.is(AsmToken::Colon)) {
4508 Lex(); // consume ':'
4509
4510 SMLoc QualLoc;
4511 StringRef Qualifier;
4512
4513 QualLoc = Lexer.getLoc();
4514 if (parseIdentifier(Qualifier))
4515 return Error(QualLoc, "missing parameter qualifier for "
4516 "'" + Parameter.Name + "' in macro '" + Name + "'");
4517
4518 if (Qualifier == "req")
4519 Parameter.Required = true;
4520 else if (Qualifier == "vararg")
4521 Parameter.Vararg = true;
4522 else
4523 return Error(QualLoc, Qualifier + " is not a valid parameter qualifier "
4524 "for '" + Parameter.Name + "' in macro '" + Name + "'");
4525 }
4526
4527 if (getLexer().is(AsmToken::Equal)) {
4528 Lex();
4529
4530 SMLoc ParamLoc;
4531
4532 ParamLoc = Lexer.getLoc();
4533 if (parseMacroArgument(Parameter.Value, /*Vararg=*/false ))
4534 return true;
4535
4536 if (Parameter.Required)
4537 Warning(ParamLoc, "pointless default value for required parameter "
4538 "'" + Parameter.Name + "' in macro '" + Name + "'");
4539 }
4540
4541 Parameters.push_back(std::move(Parameter));
4542
4543 if (getLexer().is(AsmToken::Comma))
4544 Lex();
4545 }
4546
4547 // Eat just the end of statement.
4548 Lexer.Lex();
4549
4550 // Consuming deferred text, so use Lexer.Lex to ignore Lexing Errors
4551 AsmToken EndToken, StartToken = getTok();
4552 unsigned MacroDepth = 0;
4553 // Lex the macro definition.
4554 while (true) {
4555 // Ignore Lexing errors in macros.
4556 while (Lexer.is(AsmToken::Error)) {
4557 Lexer.Lex();
4558 }
4559
4560 // Check whether we have reached the end of the file.
4561 if (getLexer().is(AsmToken::Eof))
4562 return Error(DirectiveLoc, "no matching '.endmacro' in definition");
4563
4564 // Otherwise, check whether we have reach the .endmacro or the start of a
4565 // preprocessor line marker.
4566 if (getLexer().is(AsmToken::Identifier)) {
4567 if (getTok().getIdentifier() == ".endm" ||
4568 getTok().getIdentifier() == ".endmacro") {
4569 if (MacroDepth == 0) { // Outermost macro.
4570 EndToken = getTok();
4571 Lexer.Lex();
4572 if (getLexer().isNot(AsmToken::EndOfStatement))
4573 return TokError("unexpected token in '" + EndToken.getIdentifier() +
4574 "' directive");
4575 break;
4576 } else {
4577 // Otherwise we just found the end of an inner macro.
4578 --MacroDepth;
4579 }
4580 } else if (getTok().getIdentifier() == ".macro") {
4581 // We allow nested macros. Those aren't instantiated until the outermost
4582 // macro is expanded so just ignore them for now.
4583 ++MacroDepth;
4584 }
4585 } else if (Lexer.is(AsmToken::HashDirective)) {
4586 (void)parseCppHashLineFilenameComment(getLexer().getLoc());
4587 }
4588
4589 // Otherwise, scan til the end of the statement.
4590 eatToEndOfStatement();
4591 }
4592
4593 if (getContext().lookupMacro(Name)) {
4594 return Error(DirectiveLoc, "macro '" + Name + "' is already defined");
4595 }
4596
4597 const char *BodyStart = StartToken.getLoc().getPointer();
4598 const char *BodyEnd = EndToken.getLoc().getPointer();
4599 StringRef Body = StringRef(BodyStart, BodyEnd - BodyStart);
4600 checkForBadMacro(DirectiveLoc, Name, Body, Parameters);
4601 MCAsmMacro Macro(Name, Body, std::move(Parameters));
4602 DEBUG_WITH_TYPE("asm-macros", dbgs() << "Defining new macro:\n";do { } while (false)
4603 Macro.dump())do { } while (false);
4604 getContext().defineMacro(Name, std::move(Macro));
4605 return false;
4606}
4607
4608/// checkForBadMacro
4609///
4610/// With the support added for named parameters there may be code out there that
4611/// is transitioning from positional parameters. In versions of gas that did
4612/// not support named parameters they would be ignored on the macro definition.
4613/// But to support both styles of parameters this is not possible so if a macro
4614/// definition has named parameters but does not use them and has what appears
4615/// to be positional parameters, strings like $1, $2, ... and $n, then issue a
4616/// warning that the positional parameter found in body which have no effect.
4617/// Hoping the developer will either remove the named parameters from the macro
4618/// definition so the positional parameters get used if that was what was
4619/// intended or change the macro to use the named parameters. It is possible
4620/// this warning will trigger when the none of the named parameters are used
4621/// and the strings like $1 are infact to simply to be passed trough unchanged.
4622void AsmParser::checkForBadMacro(SMLoc DirectiveLoc, StringRef Name,
4623 StringRef Body,
4624 ArrayRef<MCAsmMacroParameter> Parameters) {
4625 // If this macro is not defined with named parameters the warning we are
4626 // checking for here doesn't apply.
4627 unsigned NParameters = Parameters.size();
4628 if (NParameters == 0)
4629 return;
4630
4631 bool NamedParametersFound = false;
4632 bool PositionalParametersFound = false;
4633
4634 // Look at the body of the macro for use of both the named parameters and what
4635 // are likely to be positional parameters. This is what expandMacro() is
4636 // doing when it finds the parameters in the body.
4637 while (!Body.empty()) {
4638 // Scan for the next possible parameter.
4639 std::size_t End = Body.size(), Pos = 0;
4640 for (; Pos != End; ++Pos) {
4641 // Check for a substitution or escape.
4642 // This macro is defined with parameters, look for \foo, \bar, etc.
4643 if (Body[Pos] == '\\' && Pos + 1 != End)
4644 break;
4645
4646 // This macro should have parameters, but look for $0, $1, ..., $n too.
4647 if (Body[Pos] != '$' || Pos + 1 == End)
4648 continue;
4649 char Next = Body[Pos + 1];
4650 if (Next == '$' || Next == 'n' ||
4651 isdigit(static_cast<unsigned char>(Next)))
4652 break;
4653 }
4654
4655 // Check if we reached the end.
4656 if (Pos == End)
4657 break;
4658
4659 if (Body[Pos] == '$') {
4660 switch (Body[Pos + 1]) {
4661 // $$ => $
4662 case '$':
4663 break;
4664
4665 // $n => number of arguments
4666 case 'n':
4667 PositionalParametersFound = true;
4668 break;
4669
4670 // $[0-9] => argument
4671 default: {
4672 PositionalParametersFound = true;
4673 break;
4674 }
4675 }
4676 Pos += 2;
4677 } else {
4678 unsigned I = Pos + 1;
4679 while (isIdentifierChar(Body[I]) && I + 1 != End)
4680 ++I;
4681
4682 const char *Begin = Body.data() + Pos + 1;
4683 StringRef Argument(Begin, I - (Pos + 1));
4684 unsigned Index = 0;
4685 for (; Index < NParameters; ++Index)
4686 if (Parameters[Index].Name == Argument)
4687 break;
4688
4689 if (Index == NParameters) {
4690 if (Body[Pos + 1] == '(' && Body[Pos + 2] == ')')
4691 Pos += 3;
4692 else {
4693 Pos = I;
4694 }
4695 } else {
4696 NamedParametersFound = true;
4697 Pos += 1 + Argument.size();
4698 }
4699 }
4700 // Update the scan point.
4701 Body = Body.substr(Pos);
4702 }
4703
4704 if (!NamedParametersFound && PositionalParametersFound)
4705 Warning(DirectiveLoc, "macro defined with named parameters which are not "
4706 "used in macro body, possible positional parameter "
4707 "found in body which will have no effect");
4708}
4709
4710/// parseDirectiveExitMacro
4711/// ::= .exitm
4712bool AsmParser::parseDirectiveExitMacro(StringRef Directive) {
4713 if (parseEOL())
4714 return true;
4715
4716 if (!isInsideMacroInstantiation())
4717 return TokError("unexpected '" + Directive + "' in file, "
4718 "no current macro definition");
4719
4720 // Exit all conditionals that are active in the current macro.
4721 while (TheCondStack.size() != ActiveMacros.back()->CondStackDepth) {
4722 TheCondState = TheCondStack.back();
4723 TheCondStack.pop_back();
4724 }
4725
4726 handleMacroExit();
4727 return false;
4728}
4729
4730/// parseDirectiveEndMacro
4731/// ::= .endm
4732/// ::= .endmacro
4733bool AsmParser::parseDirectiveEndMacro(StringRef Directive) {
4734 if (getLexer().isNot(AsmToken::EndOfStatement))
4735 return TokError("unexpected token in '" + Directive + "' directive");
4736
4737 // If we are inside a macro instantiation, terminate the current
4738 // instantiation.
4739 if (isInsideMacroInstantiation()) {
4740 handleMacroExit();
4741 return false;
4742 }
4743
4744 // Otherwise, this .endmacro is a stray entry in the file; well formed
4745 // .endmacro directives are handled during the macro definition parsing.
4746 return TokError("unexpected '" + Directive + "' in file, "
4747 "no current macro definition");
4748}
4749
4750/// parseDirectivePurgeMacro
4751/// ::= .purgem name
4752bool AsmParser::parseDirectivePurgeMacro(SMLoc DirectiveLoc) {
4753 StringRef Name;
4754 SMLoc Loc;
4755 if (parseTokenLoc(Loc) ||
4756 check(parseIdentifier(Name), Loc,
4757 "expected identifier in '.purgem' directive") ||
4758 parseEOL())
4759 return true;
4760
4761 if (!getContext().lookupMacro(Name))
4762 return Error(DirectiveLoc, "macro '" + Name + "' is not defined");
4763
4764 getContext().undefineMacro(Name);
4765 DEBUG_WITH_TYPE("asm-macros", dbgs()do { } while (false)
4766 << "Un-defining macro: " << Name << "\n")do { } while (false);
4767 return false;
4768}
4769
4770/// parseDirectiveBundleAlignMode
4771/// ::= {.bundle_align_mode} expression
4772bool AsmParser::parseDirectiveBundleAlignMode() {
4773 // Expect a single argument: an expression that evaluates to a constant
4774 // in the inclusive range 0-30.
4775 SMLoc ExprLoc = getLexer().getLoc();
4776 int64_t AlignSizePow2;
4777 if (checkForValidSection() || parseAbsoluteExpression(AlignSizePow2) ||
4778 parseEOL() ||
4779 check(AlignSizePow2 < 0 || AlignSizePow2 > 30, ExprLoc,
4780 "invalid bundle alignment size (expected between 0 and 30)"))
4781 return true;
4782
4783 // Because of AlignSizePow2's verified range we can safely truncate it to
4784 // unsigned.
4785 getStreamer().emitBundleAlignMode(static_cast<unsigned>(AlignSizePow2));
4786 return false;
4787}
4788
4789/// parseDirectiveBundleLock
4790/// ::= {.bundle_lock} [align_to_end]
4791bool AsmParser::parseDirectiveBundleLock() {
4792 if (checkForValidSection())
4793 return true;
4794 bool AlignToEnd = false;
4795
4796 StringRef Option;
4797 SMLoc Loc = getTok().getLoc();
4798 const char *kInvalidOptionError =
4799 "invalid option for '.bundle_lock' directive";
4800
4801 if (!parseOptionalToken(AsmToken::EndOfStatement)) {
4802 if (check(parseIdentifier(Option), Loc, kInvalidOptionError) ||
4803 check(Option != "align_to_end", Loc, kInvalidOptionError) || parseEOL())
4804 return true;
4805 AlignToEnd = true;
4806 }
4807
4808 getStreamer().emitBundleLock(AlignToEnd);
4809 return false;
4810}
4811
4812/// parseDirectiveBundleLock
4813/// ::= {.bundle_lock}
4814bool AsmParser::parseDirectiveBundleUnlock() {
4815 if (checkForValidSection() || parseEOL())
4816 return true;
4817
4818 getStreamer().emitBundleUnlock();
4819 return false;
4820}
4821
4822/// parseDirectiveSpace
4823/// ::= (.skip | .space) expression [ , expression ]
4824bool AsmParser::parseDirectiveSpace(StringRef IDVal) {
4825 SMLoc NumBytesLoc = Lexer.getLoc();
4826 const MCExpr *NumBytes;
4827 if (checkForValidSection() || parseExpression(NumBytes))
4828 return true;
4829
4830 int64_t FillExpr = 0;
4831 if (parseOptionalToken(AsmToken::Comma))
4832 if (parseAbsoluteExpression(FillExpr))
4833 return true;
4834 if (parseEOL())
4835 return true;
4836
4837 // FIXME: Sometimes the fill expr is 'nop' if it isn't supplied, instead of 0.
4838 getStreamer().emitFill(*NumBytes, FillExpr, NumBytesLoc);
4839
4840 return false;
4841}
4842
4843/// parseDirectiveDCB
4844/// ::= .dcb.{b, l, w} expression, expression
4845bool AsmParser::parseDirectiveDCB(StringRef IDVal, unsigned Size) {
4846 SMLoc NumValuesLoc = Lexer.getLoc();
4847 int64_t NumValues;
4848 if (checkForValidSection() || parseAbsoluteExpression(NumValues))
4849 return true;
4850
4851 if (NumValues < 0) {
4852 Warning(NumValuesLoc, "'" + Twine(IDVal) + "' directive with negative repeat count has no effect");
4853 return false;
4854 }
4855
4856 if (parseComma())
4857 return true;
4858
4859 const MCExpr *Value;
4860 SMLoc ExprLoc = getLexer().getLoc();
4861 if (parseExpression(Value))
4862 return true;
4863
4864 // Special case constant expressions to match code generator.
4865 if (const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Value)) {
4866 assert(Size <= 8 && "Invalid size")(static_cast<void> (0));
4867 uint64_t IntValue = MCE->getValue();
4868 if (!isUIntN(8 * Size, IntValue) && !isIntN(8 * Size, IntValue))
4869 return Error(ExprLoc, "literal value out of range for directive");
4870 for (uint64_t i = 0, e = NumValues; i != e; ++i)
4871 getStreamer().emitIntValue(IntValue, Size);
4872 } else {
4873 for (uint64_t i = 0, e = NumValues; i != e; ++i)
4874 getStreamer().emitValue(Value, Size, ExprLoc);
4875 }
4876
4877 return parseEOL();
4878}
4879
4880/// parseDirectiveRealDCB
4881/// ::= .dcb.{d, s} expression, expression
4882bool AsmParser::parseDirectiveRealDCB(StringRef IDVal, const fltSemantics &Semantics) {
4883 SMLoc NumValuesLoc = Lexer.getLoc();
4884 int64_t NumValues;
4885 if (checkForValidSection() || parseAbsoluteExpression(NumValues))
4886 return true;
4887
4888 if (NumValues < 0) {
4889 Warning(NumValuesLoc, "'" + Twine(IDVal) + "' directive with negative repeat count has no effect");
4890 return false;
4891 }
4892
4893 if (parseComma())
4894 return true;
4895
4896 APInt AsInt;
4897 if (parseRealValue(Semantics, AsInt) || parseEOL())
4898 return true;
4899
4900 for (uint64_t i = 0, e = NumValues; i != e; ++i)
4901 getStreamer().emitIntValue(AsInt.getLimitedValue(),
4902 AsInt.getBitWidth() / 8);
4903
4904 return false;
4905}
4906
4907/// parseDirectiveDS
4908/// ::= .ds.{b, d, l, p, s, w, x} expression
4909bool AsmParser::parseDirectiveDS(StringRef IDVal, unsigned Size) {
4910 SMLoc NumValuesLoc = Lexer.getLoc();
4911 int64_t NumValues;
4912 if (checkForValidSection() || parseAbsoluteExpression(NumValues) ||
4913 parseEOL())
4914 return true;
4915
4916 if (NumValues < 0) {
4917 Warning(NumValuesLoc, "'" + Twine(IDVal) + "' directive with negative repeat count has no effect");
4918 return false;
4919 }
4920
4921 for (uint64_t i = 0, e = NumValues; i != e; ++i)
4922 getStreamer().emitFill(Size, 0);
4923
4924 return false;
4925}
4926
4927/// parseDirectiveLEB128
4928/// ::= (.sleb128 | .uleb128) [ expression (, expression)* ]
4929bool AsmParser::parseDirectiveLEB128(bool Signed) {
4930 if (checkForValidSection())
4931 return true;
4932
4933 auto parseOp = [&]() -> bool {
4934 const MCExpr *Value;
4935 if (parseExpression(Value))
4936 return true;
4937 if (Signed)
4938 getStreamer().emitSLEB128Value(Value);
4939 else
4940 getStreamer().emitULEB128Value(Value);
4941 return false;
4942 };
4943
4944 return parseMany(parseOp);
4945}
4946
4947/// parseDirectiveSymbolAttribute
4948/// ::= { ".globl", ".weak", ... } [ identifier ( , identifier )* ]
4949bool AsmParser::parseDirectiveSymbolAttribute(MCSymbolAttr Attr) {
4950 auto parseOp = [&]() -> bool {
4951 StringRef Name;
4952 SMLoc Loc = getTok().getLoc();
4953 if (parseIdentifier(Name))
4954 return Error(Loc, "expected identifier");
4955
4956 if (discardLTOSymbol(Name))
4957 return false;
4958
4959 MCSymbol *Sym = getContext().getOrCreateSymbol(Name);
4960
4961 // Assembler local symbols don't make any sense here. Complain loudly.
4962 if (Sym->isTemporary())
4963 return Error(Loc, "non-local symbol required");
4964
4965 if (!getStreamer().emitSymbolAttribute(Sym, Attr))
4966 return Error(Loc, "unable to emit symbol attribute");
4967 return false;
4968 };
4969
4970 return parseMany(parseOp);
4971}
4972
4973/// parseDirectiveComm
4974/// ::= ( .comm | .lcomm ) identifier , size_expression [ , align_expression ]
4975bool AsmParser::parseDirectiveComm(bool IsLocal) {
4976 if (checkForValidSection())
4977 return true;
4978
4979 SMLoc IDLoc = getLexer().getLoc();
4980 StringRef Name;
4981 if (parseIdentifier(Name))
4982 return TokError("expected identifier in directive");
4983
4984 // Handle the identifier as the key symbol.
4985 MCSymbol *Sym = getContext().getOrCreateSymbol(Name);
4986
4987 if (parseComma())
4988 return true;
4989
4990 int64_t Size;
4991 SMLoc SizeLoc = getLexer().getLoc();
4992 if (parseAbsoluteExpression(Size))
4993 return true;
4994
4995 int64_t Pow2Alignment = 0;
4996 SMLoc Pow2AlignmentLoc;
4997 if (getLexer().is(AsmToken::Comma)) {
4998 Lex();
4999 Pow2AlignmentLoc = getLexer().getLoc();
5000 if (parseAbsoluteExpression(Pow2Alignment))
5001 return true;
5002
5003 LCOMM::LCOMMType LCOMM = Lexer.getMAI().getLCOMMDirectiveAlignmentType();
5004 if (IsLocal && LCOMM == LCOMM::NoAlignment)
5005 return Error(Pow2AlignmentLoc, "alignment not supported on this target");
5006
5007 // If this target takes alignments in bytes (not log) validate and convert.
5008 if ((!IsLocal && Lexer.getMAI().getCOMMDirectiveAlignmentIsInBytes()) ||
5009 (IsLocal && LCOMM == LCOMM::ByteAlignment)) {
5010 if (!isPowerOf2_64(Pow2Alignment))
5011 return Error(Pow2AlignmentLoc, "alignment must be a power of 2");
5012 Pow2Alignment = Log2_64(Pow2Alignment);
5013 }
5014 }
5015
5016 if (parseEOL())
5017 return true;
5018
5019 // NOTE: a size of zero for a .comm should create a undefined symbol
5020 // but a size of .lcomm creates a bss symbol of size zero.
5021 if (Size < 0)
5022 return Error(SizeLoc, "invalid '.comm' or '.lcomm' directive size, can't "
5023 "be less than zero");
5024
5025 // NOTE: The alignment in the directive is a power of 2 value, the assembler
5026 // may internally end up wanting an alignment in bytes.
5027 // FIXME: Diagnose overflow.
5028 if (Pow2Alignment < 0)
5029 return Error(Pow2AlignmentLoc, "invalid '.comm' or '.lcomm' directive "
5030 "alignment, can't be less than zero");
5031
5032 Sym->redefineIfPossible();
5033 if (!Sym->isUndefined())
5034 return Error(IDLoc, "invalid symbol redefinition");
5035
5036 // Create the Symbol as a common or local common with Size and Pow2Alignment
5037 if (IsLocal) {
5038 getStreamer().emitLocalCommonSymbol(Sym, Size, 1 << Pow2Alignment);
5039 return false;
5040 }
5041
5042 getStreamer().emitCommonSymbol(Sym, Size, 1 << Pow2Alignment);
5043 return false;
5044}
5045
5046/// parseDirectiveAbort
5047/// ::= .abort [... message ...]
5048bool AsmParser::parseDirectiveAbort() {
5049 // FIXME: Use loc from directive.
5050 SMLoc Loc = getLexer().getLoc();
5051
5052 StringRef Str = parseStringToEndOfStatement();
5053 if (parseEOL())
5054 return true;
5055
5056 if (Str.empty())
5057 return Error(Loc, ".abort detected. Assembly stopping.");
5058 else
5059 return Error(Loc, ".abort '" + Str + "' detected. Assembly stopping.");
5060 // FIXME: Actually abort assembly here.
5061
5062 return false;
5063}
5064
5065/// parseDirectiveInclude
5066/// ::= .include "filename"
5067bool AsmParser::parseDirectiveInclude() {
5068 // Allow the strings to have escaped octal character sequence.
5069 std::string Filename;
5070 SMLoc IncludeLoc = getTok().getLoc();
5071
5072 if (check(getTok().isNot(AsmToken::String),
5073 "expected string in '.include' directive") ||
5074 parseEscapedString(Filename) ||
5075 check(getTok().isNot(AsmToken::EndOfStatement),
5076 "unexpected token in '.include' directive") ||
5077 // Attempt to switch the lexer to the included file before consuming the
5078 // end of statement to avoid losing it when we switch.
5079 check(enterIncludeFile(Filename), IncludeLoc,
5080 "Could not find include file '" + Filename + "'"))
5081 return true;
5082
5083 return false;
5084}
5085
5086/// parseDirectiveIncbin
5087/// ::= .incbin "filename" [ , skip [ , count ] ]
5088bool AsmParser::parseDirectiveIncbin() {
5089 // Allow the strings to have escaped octal character sequence.
5090 std::string Filename;
5091 SMLoc IncbinLoc = getTok().getLoc();
5092 if (check(getTok().isNot(AsmToken::String),
5093 "expected string in '.incbin' directive") ||
5094 parseEscapedString(Filename))
5095 return true;
5096
5097 int64_t Skip = 0;
5098 const MCExpr *Count = nullptr;
5099 SMLoc SkipLoc, CountLoc;
5100 if (parseOptionalToken(AsmToken::Comma)) {
5101 // The skip expression can be omitted while specifying the count, e.g:
5102 // .incbin "filename",,4
5103 if (getTok().isNot(AsmToken::Comma)) {
5104 if (parseTokenLoc(SkipLoc) || parseAbsoluteExpression(Skip))
5105 return true;
5106 }
5107 if (parseOptionalToken(AsmToken::Comma)) {
5108 CountLoc = getTok().getLoc();
5109 if (parseExpression(Count))
5110 return true;
5111 }
5112 }
5113
5114 if (parseEOL())
5115 return true;
5116
5117 if (check(Skip < 0, SkipLoc, "skip is negative"))
5118 return true;
5119
5120 // Attempt to process the included file.
5121 if (processIncbinFile(Filename, Skip, Count, CountLoc))
5122 return Error(IncbinLoc, "Could not find incbin file '" + Filename + "'");
5123 return false;
5124}
5125
5126/// parseDirectiveIf
5127/// ::= .if{,eq,ge,gt,le,lt,ne} expression
5128bool AsmParser::parseDirectiveIf(SMLoc DirectiveLoc, DirectiveKind DirKind) {
5129 TheCondStack.push_back(TheCondState);
5130 TheCondState.TheCond = AsmCond::IfCond;
5131 if (TheCondState.Ignore) {
5132 eatToEndOfStatement();
5133 } else {
5134 int64_t ExprValue;
5135 if (parseAbsoluteExpression(ExprValue) || parseEOL())
5136 return true;
5137
5138 switch (DirKind) {
5139 default:
5140 llvm_unreachable("unsupported directive")__builtin_unreachable();
5141 case DK_IF:
5142 case DK_IFNE:
5143 break;
5144 case DK_IFEQ:
5145 ExprValue = ExprValue == 0;
5146 break;
5147 case DK_IFGE:
5148 ExprValue = ExprValue >= 0;
5149 break;
5150 case DK_IFGT:
5151 ExprValue = ExprValue > 0;
5152 break;
5153 case DK_IFLE:
5154 ExprValue = ExprValue <= 0;
5155 break;
5156 case DK_IFLT:
5157 ExprValue = ExprValue < 0;
5158 break;
5159 }
5160
5161 TheCondState.CondMet = ExprValue;
5162 TheCondState.Ignore = !TheCondState.CondMet;
5163 }
5164
5165 return false;
5166}
5167
5168/// parseDirectiveIfb
5169/// ::= .ifb string
5170bool AsmParser::parseDirectiveIfb(SMLoc DirectiveLoc, bool ExpectBlank) {
5171 TheCondStack.push_back(TheCondState);
5172 TheCondState.TheCond = AsmCond::IfCond;
5173
5174 if (TheCondState.Ignore) {
5175 eatToEndOfStatement();
5176 } else {
5177 StringRef Str = parseStringToEndOfStatement();
5178
5179 if (parseEOL())
5180 return true;
5181
5182 TheCondState.CondMet = ExpectBlank == Str.empty();
5183 TheCondState.Ignore = !TheCondState.CondMet;
5184 }
5185
5186 return false;
5187}
5188
5189/// parseDirectiveIfc
5190/// ::= .ifc string1, string2
5191/// ::= .ifnc string1, string2
5192bool AsmParser::parseDirectiveIfc(SMLoc DirectiveLoc, bool ExpectEqual) {
5193 TheCondStack.push_back(TheCondState);
5194 TheCondState.TheCond = AsmCond::IfCond;
5195
5196 if (TheCondState.Ignore) {
5197 eatToEndOfStatement();
5198 } else {
5199 StringRef Str1 = parseStringToComma();
5200
5201 if (parseComma())
5202 return true;
5203
5204 StringRef Str2 = parseStringToEndOfStatement();
5205
5206 if (parseEOL())
5207 return true;
5208
5209 TheCondState.CondMet = ExpectEqual == (Str1.trim() == Str2.trim());
5210 TheCondState.Ignore = !TheCondState.CondMet;
5211 }
5212
5213 return false;
5214}
5215
5216/// parseDirectiveIfeqs
5217/// ::= .ifeqs string1, string2
5218bool AsmParser::parseDirectiveIfeqs(SMLoc DirectiveLoc, bool ExpectEqual) {
5219 if (Lexer.isNot(AsmToken::String)) {
5220 if (ExpectEqual)
5221 return TokError("expected string parameter for '.ifeqs' directive");
5222 return TokError("expected string parameter for '.ifnes' directive");
5223 }
5224
5225 StringRef String1 = getTok().getStringContents();
5226 Lex();
5227
5228 if (Lexer.isNot(AsmToken::Comma)) {
5229 if (ExpectEqual)
5230 return TokError(
5231 "expected comma after first string for '.ifeqs' directive");
5232 return TokError("expected comma after first string for '.ifnes' directive");
5233 }
5234
5235 Lex();
5236
5237 if (Lexer.isNot(AsmToken::String)) {
5238 if (ExpectEqual)
5239 return TokError("expected string parameter for '.ifeqs' directive");
5240 return TokError("expected string parameter for '.ifnes' directive");
5241 }
5242
5243 StringRef String2 = getTok().getStringContents();
5244 Lex();
5245
5246 TheCondStack.push_back(TheCondState);
5247 TheCondState.TheCond = AsmCond::IfCond;
5248 TheCondState.CondMet = ExpectEqual == (String1 == String2);
5249 TheCondState.Ignore = !TheCondState.CondMet;
5250
5251 return false;
5252}
5253
5254/// parseDirectiveIfdef
5255/// ::= .ifdef symbol
5256bool AsmParser::parseDirectiveIfdef(SMLoc DirectiveLoc, bool expect_defined) {
5257 StringRef Name;
5258 TheCondStack.push_back(TheCondState);
5259 TheCondState.TheCond = AsmCond::IfCond;
5260
5261 if (TheCondState.Ignore) {
5262 eatToEndOfStatement();
5263 } else {
5264 if (check(parseIdentifier(Name), "expected identifier after '.ifdef'") ||
5265 parseEOL())
5266 return true;
5267
5268 MCSymbol *Sym = getContext().lookupSymbol(Name);
5269
5270 if (expect_defined)
5271 TheCondState.CondMet = (Sym && !Sym->isUndefined(false));
5272 else
5273 TheCondState.CondMet = (!Sym || Sym->isUndefined(false));
5274 TheCondState.Ignore = !TheCondState.CondMet;
5275 }
5276
5277 return false;
5278}
5279
5280/// parseDirectiveElseIf
5281/// ::= .elseif expression
5282bool AsmParser::parseDirectiveElseIf(SMLoc DirectiveLoc) {
5283 if (TheCondState.TheCond != AsmCond::IfCond &&
5284 TheCondState.TheCond != AsmCond::ElseIfCond)
5285 return Error(DirectiveLoc, "Encountered a .elseif that doesn't follow an"
5286 " .if or an .elseif");
5287 TheCondState.TheCond = AsmCond::ElseIfCond;
5288
5289 bool LastIgnoreState = false;
5290 if (!TheCondStack.empty())
5291 LastIgnoreState = TheCondStack.back().Ignore;
5292 if (LastIgnoreState || TheCondState.CondMet) {
5293 TheCondState.Ignore = true;
5294 eatToEndOfStatement();
5295 } else {
5296 int64_t ExprValue;
5297 if (parseAbsoluteExpression(ExprValue))
5298 return true;
5299
5300 if (parseEOL())
5301 return true;
5302
5303 TheCondState.CondMet = ExprValue;
5304 TheCondState.Ignore = !TheCondState.CondMet;
5305 }
5306
5307 return false;
5308}
5309
5310/// parseDirectiveElse
5311/// ::= .else
5312bool AsmParser::parseDirectiveElse(SMLoc DirectiveLoc) {
5313 if (parseEOL())
5314 return true;
5315
5316 if (TheCondState.TheCond != AsmCond::IfCond &&
5317 TheCondState.TheCond != AsmCond::ElseIfCond)
5318 return Error(DirectiveLoc, "Encountered a .else that doesn't follow "
5319 " an .if or an .elseif");
5320 TheCondState.TheCond = AsmCond::ElseCond;
5321 bool LastIgnoreState = false;
5322 if (!TheCondStack.empty())
5323 LastIgnoreState = TheCondStack.back().Ignore;
5324 if (LastIgnoreState || TheCondState.CondMet)
5325 TheCondState.Ignore = true;
5326 else
5327 TheCondState.Ignore = false;
5328
5329 return false;
5330}
5331
5332/// parseDirectiveEnd
5333/// ::= .end
5334bool AsmParser::parseDirectiveEnd(SMLoc DirectiveLoc) {
5335 if (parseEOL())
5336 return true;
5337
5338 while (Lexer.isNot(AsmToken::Eof))
5339 Lexer.Lex();
5340
5341 return false;
5342}
5343
5344/// parseDirectiveError
5345/// ::= .err
5346/// ::= .error [string]
5347bool AsmParser::parseDirectiveError(SMLoc L, bool WithMessage) {
5348 if (!TheCondStack.empty()) {
5349 if (TheCondStack.back().Ignore) {
5350 eatToEndOfStatement();
5351 return false;
5352 }
5353 }
5354
5355 if (!WithMessage)
5356 return Error(L, ".err encountered");
5357
5358 StringRef Message = ".error directive invoked in source file";
5359 if (Lexer.isNot(AsmToken::EndOfStatement)) {
5360 if (Lexer.isNot(AsmToken::String))
5361 return TokError(".error argument must be a string");
5362
5363 Message = getTok().getStringContents();
5364 Lex();
5365 }
5366
5367 return Error(L, Message);
5368}
5369
5370/// parseDirectiveWarning
5371/// ::= .warning [string]
5372bool AsmParser::parseDirectiveWarning(SMLoc L) {
5373 if (!TheCondStack.empty()) {
5374 if (TheCondStack.back().Ignore) {
5375 eatToEndOfStatement();
5376 return false;
5377 }
5378 }
5379
5380 StringRef Message = ".warning directive invoked in source file";
5381
5382 if (!parseOptionalToken(AsmToken::EndOfStatement)) {
5383 if (Lexer.isNot(AsmToken::String))
5384 return TokError(".warning argument must be a string");
5385
5386 Message = getTok().getStringContents();
5387 Lex();
5388 if (parseEOL())
5389 return true;
5390 }
5391
5392 return Warning(L, Message);
5393}
5394
5395/// parseDirectiveEndIf
5396/// ::= .endif
5397bool AsmParser::parseDirectiveEndIf(SMLoc DirectiveLoc) {
5398 if (parseEOL())
5399 return true;
5400
5401 if ((TheCondState.TheCond == AsmCond::NoCond) || TheCondStack.empty())
5402 return Error(DirectiveLoc, "Encountered a .endif that doesn't follow "
5403 "an .if or .else");
5404 if (!TheCondStack.empty()) {
5405 TheCondState = TheCondStack.back();
5406 TheCondStack.pop_back();
5407 }
5408
5409 return false;
5410}
5411
5412void AsmParser::initializeDirectiveKindMap() {
5413 /* Lookup will be done with the directive
5414 * converted to lower case, so all these
5415 * keys should be lower case.
5416 * (target specific directives are handled
5417 * elsewhere)
5418 */
5419 DirectiveKindMap[".set"] = DK_SET;
5420 DirectiveKindMap[".equ"] = DK_EQU;
5421 DirectiveKindMap[".equiv"] = DK_EQUIV;
5422 DirectiveKindMap[".ascii"] = DK_ASCII;
5423 DirectiveKindMap[".asciz"] = DK_ASCIZ;
5424 DirectiveKindMap[".string"] = DK_STRING;
5425 DirectiveKindMap[".byte"] = DK_BYTE;
5426 DirectiveKindMap[".short"] = DK_SHORT;
5427 DirectiveKindMap[".value"] = DK_VALUE;
5428 DirectiveKindMap[".2byte"] = DK_2BYTE;
5429 DirectiveKindMap[".long"] = DK_LONG;
5430 DirectiveKindMap[".int"] = DK_INT;
5431 DirectiveKindMap[".4byte"] = DK_4BYTE;
5432 DirectiveKindMap[".quad"] = DK_QUAD;
5433 DirectiveKindMap[".8byte"] = DK_8BYTE;
5434 DirectiveKindMap[".octa"] = DK_OCTA;
5435 DirectiveKindMap[".single"] = DK_SINGLE;
5436 DirectiveKindMap[".float"] = DK_FLOAT;
5437 DirectiveKindMap[".double"] = DK_DOUBLE;
5438 DirectiveKindMap[".align"] = DK_ALIGN;
5439 DirectiveKindMap[".align32"] = DK_ALIGN32;
5440 DirectiveKindMap[".balign"] = DK_BALIGN;
5441 DirectiveKindMap[".balignw"] = DK_BALIGNW;
5442 DirectiveKindMap[".balignl"] = DK_BALIGNL;
5443 DirectiveKindMap[".p2align"] = DK_P2ALIGN;
5444 DirectiveKindMap[".p2alignw"] = DK_P2ALIGNW;
5445 DirectiveKindMap[".p2alignl"] = DK_P2ALIGNL;
5446 DirectiveKindMap[".org"] = DK_ORG;
5447 DirectiveKindMap[".fill"] = DK_FILL;
5448 DirectiveKindMap[".zero"] = DK_ZERO;
5449 DirectiveKindMap[".extern"] = DK_EXTERN;
5450 DirectiveKindMap[".globl"] = DK_GLOBL;
5451 DirectiveKindMap[".global"] = DK_GLOBAL;
5452 DirectiveKindMap[".lazy_reference"] = DK_LAZY_REFERENCE;
5453 DirectiveKindMap[".no_dead_strip"] = DK_NO_DEAD_STRIP;
5454 DirectiveKindMap[".symbol_resolver"] = DK_SYMBOL_RESOLVER;
5455 DirectiveKindMap[".private_extern"] = DK_PRIVATE_EXTERN;
5456 DirectiveKindMap[".reference"] = DK_REFERENCE;
5457 DirectiveKindMap[".weak_definition"] = DK_WEAK_DEFINITION;
5458 DirectiveKindMap[".weak_reference"] = DK_WEAK_REFERENCE;
5459 DirectiveKindMap[".weak_def_can_be_hidden"] = DK_WEAK_DEF_CAN_BE_HIDDEN;
5460 DirectiveKindMap[".cold"] = DK_COLD;
5461 DirectiveKindMap[".comm"] = DK_COMM;
5462 DirectiveKindMap[".common"] = DK_COMMON;
5463 DirectiveKindMap[".lcomm"] = DK_LCOMM;
5464 DirectiveKindMap[".abort"] = DK_ABORT;
5465 DirectiveKindMap[".include"] = DK_INCLUDE;
5466 DirectiveKindMap[".incbin"] = DK_INCBIN;
5467 DirectiveKindMap[".code16"] = DK_CODE16;
5468 DirectiveKindMap[".code16gcc"] = DK_CODE16GCC;
5469 DirectiveKindMap[".rept"] = DK_REPT;
5470 DirectiveKindMap[".rep"] = DK_REPT;
5471 DirectiveKindMap[".irp"] = DK_IRP;
5472 DirectiveKindMap[".irpc"] = DK_IRPC;
5473 DirectiveKindMap[".endr"] = DK_ENDR;
5474 DirectiveKindMap[".bundle_align_mode"] = DK_BUNDLE_ALIGN_MODE;
5475 DirectiveKindMap[".bundle_lock"] = DK_BUNDLE_LOCK;
5476 DirectiveKindMap[".bundle_unlock"] = DK_BUNDLE_UNLOCK;
5477 DirectiveKindMap[".if"] = DK_IF;
5478 DirectiveKindMap[".ifeq"] = DK_IFEQ;
5479 DirectiveKindMap[".ifge"] = DK_IFGE;
5480 DirectiveKindMap[".ifgt"] = DK_IFGT;
5481 DirectiveKindMap[".ifle"] = DK_IFLE;
5482 DirectiveKindMap[".iflt"] = DK_IFLT;
5483 DirectiveKindMap[".ifne"] = DK_IFNE;
5484 DirectiveKindMap[".ifb"] = DK_IFB;
5485 DirectiveKindMap[".ifnb"] = DK_IFNB;
5486 DirectiveKindMap[".ifc"] = DK_IFC;
5487 DirectiveKindMap[".ifeqs"] = DK_IFEQS;
5488 DirectiveKindMap[".ifnc"] = DK_IFNC;
5489 DirectiveKindMap[".ifnes"] = DK_IFNES;
5490 DirectiveKindMap[".ifdef"] = DK_IFDEF;
5491 DirectiveKindMap[".ifndef"] = DK_IFNDEF;
5492 DirectiveKindMap[".ifnotdef"] = DK_IFNOTDEF;
5493 DirectiveKindMap[".elseif"] = DK_ELSEIF;
5494 DirectiveKindMap[".else"] = DK_ELSE;
5495 DirectiveKindMap[".end"] = DK_END;
5496 DirectiveKindMap[".endif"] = DK_ENDIF;
5497 DirectiveKindMap[".skip"] = DK_SKIP;
5498 DirectiveKindMap[".space"] = DK_SPACE;
5499 DirectiveKindMap[".file"] = DK_FILE;
5500 DirectiveKindMap[".line"] = DK_LINE;
5501 DirectiveKindMap[".loc"] = DK_LOC;
5502 DirectiveKindMap[".stabs"] = DK_STABS;
5503 DirectiveKindMap[".cv_file"] = DK_CV_FILE;
5504 DirectiveKindMap[".cv_func_id"] = DK_CV_FUNC_ID;
5505 DirectiveKindMap[".cv_loc"] = DK_CV_LOC;
5506 DirectiveKindMap[".cv_linetable"] = DK_CV_LINETABLE;
5507 DirectiveKindMap[".cv_inline_linetable"] = DK_CV_INLINE_LINETABLE;
5508 DirectiveKindMap[".cv_inline_site_id"] = DK_CV_INLINE_SITE_ID;
5509 DirectiveKindMap[".cv_def_range"] = DK_CV_DEF_RANGE;
5510 DirectiveKindMap[".cv_string"] = DK_CV_STRING;
5511 DirectiveKindMap[".cv_stringtable"] = DK_CV_STRINGTABLE;
5512 DirectiveKindMap[".cv_filechecksums"] = DK_CV_FILECHECKSUMS;
5513 DirectiveKindMap[".cv_filechecksumoffset"] = DK_CV_FILECHECKSUM_OFFSET;
5514 DirectiveKindMap[".cv_fpo_data"] = DK_CV_FPO_DATA;
5515 DirectiveKindMap[".sleb128"] = DK_SLEB128;
5516 DirectiveKindMap[".uleb128"] = DK_ULEB128;
5517 DirectiveKindMap[".cfi_sections"] = DK_CFI_SECTIONS;
5518 DirectiveKindMap[".cfi_startproc"] = DK_CFI_STARTPROC;
5519 DirectiveKindMap[".cfi_endproc"] = DK_CFI_ENDPROC;
5520 DirectiveKindMap[".cfi_def_cfa"] = DK_CFI_DEF_CFA;
5521 DirectiveKindMap[".cfi_def_cfa_offset"] = DK_CFI_DEF_CFA_OFFSET;
5522 DirectiveKindMap[".cfi_adjust_cfa_offset"] = DK_CFI_ADJUST_CFA_OFFSET;
5523 DirectiveKindMap[".cfi_def_cfa_register"] = DK_CFI_DEF_CFA_REGISTER;
5524 DirectiveKindMap[".cfi_llvm_def_aspace_cfa"] = DK_CFI_LLVM_DEF_ASPACE_CFA;
5525 DirectiveKindMap[".cfi_offset"] = DK_CFI_OFFSET;
5526 DirectiveKindMap[".cfi_rel_offset"] = DK_CFI_REL_OFFSET;
5527 DirectiveKindMap[".cfi_personality"] = DK_CFI_PERSONALITY;
5528 DirectiveKindMap[".cfi_lsda"] = DK_CFI_LSDA;
5529 DirectiveKindMap[".cfi_remember_state"] = DK_CFI_REMEMBER_STATE;
5530 DirectiveKindMap[".cfi_restore_state"] = DK_CFI_RESTORE_STATE;
5531 DirectiveKindMap[".cfi_same_value"] = DK_CFI_SAME_VALUE;
5532 DirectiveKindMap[".cfi_restore"] = DK_CFI_RESTORE;
5533 DirectiveKindMap[".cfi_escape"] = DK_CFI_ESCAPE;
5534 DirectiveKindMap[".cfi_return_column"] = DK_CFI_RETURN_COLUMN;
5535 DirectiveKindMap[".cfi_signal_frame"] = DK_CFI_SIGNAL_FRAME;
5536 DirectiveKindMap[".cfi_undefined"] = DK_CFI_UNDEFINED;
5537 DirectiveKindMap[".cfi_register"] = DK_CFI_REGISTER;
5538 DirectiveKindMap[".cfi_window_save"] = DK_CFI_WINDOW_SAVE;
5539 DirectiveKindMap[".cfi_b_key_frame"] = DK_CFI_B_KEY_FRAME;
5540 DirectiveKindMap[".macros_on"] = DK_MACROS_ON;
5541 DirectiveKindMap[".macros_off"] = DK_MACROS_OFF;
5542 DirectiveKindMap[".macro"] = DK_MACRO;
5543 DirectiveKindMap[".exitm"] = DK_EXITM;
5544 DirectiveKindMap[".endm"] = DK_ENDM;
5545 DirectiveKindMap[".endmacro"] = DK_ENDMACRO;
5546 DirectiveKindMap[".purgem"] = DK_PURGEM;
5547 DirectiveKindMap[".err"] = DK_ERR;
5548 DirectiveKindMap[".error"] = DK_ERROR;
5549 DirectiveKindMap[".warning"] = DK_WARNING;
5550 DirectiveKindMap[".altmacro"] = DK_ALTMACRO;
5551 DirectiveKindMap[".noaltmacro"] = DK_NOALTMACRO;
5552 DirectiveKindMap[".reloc"] = DK_RELOC;
5553 DirectiveKindMap[".dc"] = DK_DC;
5554 DirectiveKindMap[".dc.a"] = DK_DC_A;
5555 DirectiveKindMap[".dc.b"] = DK_DC_B;
5556 DirectiveKindMap[".dc.d"] = DK_DC_D;
5557 DirectiveKindMap[".dc.l"] = DK_DC_L;
5558 DirectiveKindMap[".dc.s"] = DK_DC_S;
5559 DirectiveKindMap[".dc.w"] = DK_DC_W;
5560 DirectiveKindMap[".dc.x"] = DK_DC_X;
5561 DirectiveKindMap[".dcb"] = DK_DCB;
5562 DirectiveKindMap[".dcb.b"] = DK_DCB_B;
5563 DirectiveKindMap[".dcb.d"] = DK_DCB_D;
5564 DirectiveKindMap[".dcb.l"] = DK_DCB_L;
5565 DirectiveKindMap[".dcb.s"] = DK_DCB_S;
5566 DirectiveKindMap[".dcb.w"] = DK_DCB_W;
5567 DirectiveKindMap[".dcb.x"] = DK_DCB_X;
5568 DirectiveKindMap[".ds"] = DK_DS;
5569 DirectiveKindMap[".ds.b"] = DK_DS_B;
5570 DirectiveKindMap[".ds.d"] = DK_DS_D;
5571 DirectiveKindMap[".ds.l"] = DK_DS_L;
5572 DirectiveKindMap[".ds.p"] = DK_DS_P;
5573 DirectiveKindMap[".ds.s"] = DK_DS_S;
5574 DirectiveKindMap[".ds.w"] = DK_DS_W;
5575 DirectiveKindMap[".ds.x"] = DK_DS_X;
5576 DirectiveKindMap[".print"] = DK_PRINT;
5577 DirectiveKindMap[".addrsig"] = DK_ADDRSIG;
5578 DirectiveKindMap[".addrsig_sym"] = DK_ADDRSIG_SYM;
5579 DirectiveKindMap[".pseudoprobe"] = DK_PSEUDO_PROBE;
5580 DirectiveKindMap[".lto_discard"] = DK_LTO_DISCARD;
5581}
5582
5583MCAsmMacro *AsmParser::parseMacroLikeBody(SMLoc DirectiveLoc) {
5584 AsmToken EndToken, StartToken = getTok();
5585
5586 unsigned NestLevel = 0;
5587 while (true) {
5588 // Check whether we have reached the end of the file.
5589 if (getLexer().is(AsmToken::Eof)) {
5590 printError(DirectiveLoc, "no matching '.endr' in definition");
5591 return nullptr;
5592 }
5593
5594 if (Lexer.is(AsmToken::Identifier) &&
5595 (getTok().getIdentifier() == ".rep" ||
5596 getTok().getIdentifier() == ".rept" ||
5597 getTok().getIdentifier() == ".irp" ||
5598 getTok().getIdentifier() == ".irpc")) {
5599 ++NestLevel;
5600 }
5601
5602 // Otherwise, check whether we have reached the .endr.
5603 if (Lexer.is(AsmToken::Identifier) && getTok().getIdentifier() == ".endr") {
5604 if (NestLevel == 0) {
5605 EndToken = getTok();
5606 Lex();
5607 if (Lexer.isNot(AsmToken::EndOfStatement)) {
5608 printError(getTok().getLoc(),
5609 "unexpected token in '.endr' directive");
5610 return nullptr;
5611 }
5612 break;
5613 }
5614 --NestLevel;
5615 }
5616
5617 // Otherwise, scan till the end of the statement.
5618 eatToEndOfStatement();
5619 }
5620
5621 const char *BodyStart = StartToken.getLoc().getPointer();
5622 const char *BodyEnd = EndToken.getLoc().getPointer();
5623 StringRef Body = StringRef(BodyStart, BodyEnd - BodyStart);
5624
5625 // We Are Anonymous.
5626 MacroLikeBodies.emplace_back(StringRef(), Body, MCAsmMacroParameters());
5627 return &MacroLikeBodies.back();
5628}
5629
5630void AsmParser::instantiateMacroLikeBody(MCAsmMacro *M, SMLoc DirectiveLoc,
5631 raw_svector_ostream &OS) {
5632 OS << ".endr\n";
5633
5634 std::unique_ptr<MemoryBuffer> Instantiation =
5635 MemoryBuffer::getMemBufferCopy(OS.str(), "<instantiation>");
5636
5637 // Create the macro instantiation object and add to the current macro
5638 // instantiation stack.
5639 MacroInstantiation *MI = new MacroInstantiation{
5640 DirectiveLoc, CurBuffer, getTok().getLoc(), TheCondStack.size()};
5641 ActiveMacros.push_back(MI);
5642
5643 // Jump to the macro instantiation and prime the lexer.
5644 CurBuffer = SrcMgr.AddNewSourceBuffer(std::move(Instantiation), SMLoc());
5645 Lexer.setBuffer(SrcMgr.getMemoryBuffer(CurBuffer)->getBuffer());
5646 Lex();
5647}
5648
5649/// parseDirectiveRept
5650/// ::= .rep | .rept count
5651bool AsmParser::parseDirectiveRept(SMLoc DirectiveLoc, StringRef Dir) {
5652 const MCExpr *CountExpr;
5653 SMLoc CountLoc = getTok().getLoc();
5654 if (parseExpression(CountExpr))
5655 return true;
5656
5657 int64_t Count;
5658 if (!CountExpr->evaluateAsAbsolute(Count, getStreamer().getAssemblerPtr())) {
5659 return Error(CountLoc, "unexpected token in '" + Dir + "' directive");
5660 }
5661
5662 if (check(Count < 0, CountLoc, "Count is negative") || parseEOL())
5663 return true;
5664
5665 // Lex the rept definition.
5666 MCAsmMacro *M = parseMacroLikeBody(DirectiveLoc);
5667 if (!M)
5668 return true;
5669
5670 // Macro instantiation is lexical, unfortunately. We construct a new buffer
5671 // to hold the macro body with substitutions.
5672 SmallString<256> Buf;
5673 raw_svector_ostream OS(Buf);
5674 while (Count--) {
5675 // Note that the AtPseudoVariable is disabled for instantiations of .rep(t).
5676 if (expandMacro(OS, M->Body, None, None, false, getTok().getLoc()))
5677 return true;
5678 }
5679 instantiateMacroLikeBody(M, DirectiveLoc, OS);
5680
5681 return false;
5682}
5683
5684/// parseDirectiveIrp
5685/// ::= .irp symbol,values
5686bool AsmParser::parseDirectiveIrp(SMLoc DirectiveLoc) {
5687 MCAsmMacroParameter Parameter;
5688 MCAsmMacroArguments A;
5689 if (check(parseIdentifier(Parameter.Name),
5690 "expected identifier in '.irp' directive") ||
5691 parseComma() || parseMacroArguments(nullptr, A) || parseEOL())
5692 return true;
5693
5694 // Lex the irp definition.
5695 MCAsmMacro *M = parseMacroLikeBody(DirectiveLoc);
5696 if (!M)
5697 return true;
5698
5699 // Macro instantiation is lexical, unfortunately. We construct a new buffer
5700 // to hold the macro body with substitutions.
5701 SmallString<256> Buf;
5702 raw_svector_ostream OS(Buf);
5703
5704 for (const MCAsmMacroArgument &Arg : A) {
5705 // Note that the AtPseudoVariable is enabled for instantiations of .irp.
5706 // This is undocumented, but GAS seems to support it.
5707 if (expandMacro(OS, M->Body, Parameter, Arg, true, getTok().getLoc()))
5708 return true;
5709 }
5710
5711 instantiateMacroLikeBody(M, DirectiveLoc, OS);
5712
5713 return false;
5714}
5715
5716/// parseDirectiveIrpc
5717/// ::= .irpc symbol,values
5718bool AsmParser::parseDirectiveIrpc(SMLoc DirectiveLoc) {
5719 MCAsmMacroParameter Parameter;
5720 MCAsmMacroArguments A;
5721
5722 if (check(parseIdentifier(Parameter.Name),
25
Assuming the condition is false
5723 "expected identifier in '.irpc' directive") ||
5724 parseComma() || parseMacroArguments(nullptr, A))
26
Assuming the condition is false
27
Passing null pointer value via 1st parameter 'M'
28
Calling 'AsmParser::parseMacroArguments'
5725 return true;
5726
5727 if (A.size() != 1 || A.front().size() != 1)
5728 return TokError("unexpected token in '.irpc' directive");
5729 if (parseEOL())
5730 return true;
5731
5732 // Lex the irpc definition.
5733 MCAsmMacro *M = parseMacroLikeBody(DirectiveLoc);
5734 if (!M)
5735 return true;
5736
5737 // Macro instantiation is lexical, unfortunately. We construct a new buffer
5738 // to hold the macro body with substitutions.
5739 SmallString<256> Buf;
5740 raw_svector_ostream OS(Buf);
5741
5742 StringRef Values = A.front().front().getString();
5743 for (std::size_t I = 0, End = Values.size(); I != End; ++I) {
5744 MCAsmMacroArgument Arg;
5745 Arg.emplace_back(AsmToken::Identifier, Values.slice(I, I + 1));
5746
5747 // Note that the AtPseudoVariable is enabled for instantiations of .irpc.
5748 // This is undocumented, but GAS seems to support it.
5749 if (expandMacro(OS, M->Body, Parameter, Arg, true, getTok().getLoc()))
5750 return true;
5751 }
5752
5753 instantiateMacroLikeBody(M, DirectiveLoc, OS);
5754
5755 return false;
5756}
5757
5758bool AsmParser::parseDirectiveEndr(SMLoc DirectiveLoc) {
5759 if (ActiveMacros.empty())
5760 return TokError("unmatched '.endr' directive");
5761
5762 // The only .repl that should get here are the ones created by
5763 // instantiateMacroLikeBody.
5764 assert(getLexer().is(AsmToken::EndOfStatement))(static_cast<void> (0));
5765
5766 handleMacroExit();
5767 return false;
5768}
5769
5770bool AsmParser::parseDirectiveMSEmit(SMLoc IDLoc, ParseStatementInfo &Info,
5771 size_t Len) {
5772 const MCExpr *Value;
5773 SMLoc ExprLoc = getLexer().getLoc();
5774 if (parseExpression(Value))
5775 return true;
5776 const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Value);
5777 if (!MCE)
5778 return Error(ExprLoc, "unexpected expression in _emit");
5779 uint64_t IntValue = MCE->getValue();
5780 if (!isUInt<8>(IntValue) && !isInt<8>(IntValue))
5781 return Error(ExprLoc, "literal value out of range for directive");
5782
5783 Info.AsmRewrites->emplace_back(AOK_Emit, IDLoc, Len);
5784 return false;
5785}
5786
5787bool AsmParser::parseDirectiveMSAlign(SMLoc IDLoc, ParseStatementInfo &Info) {
5788 const MCExpr *Value;
5789 SMLoc ExprLoc = getLexer().getLoc();
5790 if (parseExpression(Value))
5791 return true;
5792 const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Value);
5793 if (!MCE)
5794 return Error(ExprLoc, "unexpected expression in align");
5795 uint64_t IntValue = MCE->getValue();
5796 if (!isPowerOf2_64(IntValue))
5797 return Error(ExprLoc, "literal value not a power of two greater then zero");
5798
5799 Info.AsmRewrites->emplace_back(AOK_Align, IDLoc, 5, Log2_64(IntValue));
5800 return false;
5801}
5802
5803bool AsmParser::parseDirectivePrint(SMLoc DirectiveLoc) {
5804 const AsmToken StrTok = getTok();
5805 Lex();
5806 if (StrTok.isNot(AsmToken::String) || StrTok.getString().front() != '"')
5807 return Error(DirectiveLoc, "expected double quoted string after .print");
5808 if (parseEOL())
5809 return true;
5810 llvm::outs() << StrTok.getStringContents() << '\n';
5811 return false;
5812}
5813
5814bool AsmParser::parseDirectiveAddrsig() {
5815 if (parseEOL())
5816 return true;
5817 getStreamer().emitAddrsig();
5818 return false;
5819}
5820
5821bool AsmParser::parseDirectiveAddrsigSym() {
5822 StringRef Name;
5823 if (check(parseIdentifier(Name), "expected identifier") || parseEOL())
5824 return true;
5825 MCSymbol *Sym = getContext().getOrCreateSymbol(Name);
5826 getStreamer().emitAddrsigSym(Sym);
5827 return false;
5828}
5829
5830bool AsmParser::parseDirectivePseudoProbe() {
5831 int64_t Guid;
5832 int64_t Index;
5833 int64_t Type;
5834 int64_t Attr;
5835
5836 if (getLexer().is(AsmToken::Integer)) {
5837 if (parseIntToken(Guid, "unexpected token in '.pseudoprobe' directive"))
5838 return true;
5839 }
5840
5841 if (getLexer().is(AsmToken::Integer)) {
5842 if (parseIntToken(Index, "unexpected token in '.pseudoprobe' directive"))
5843 return true;
5844 }
5845
5846 if (getLexer().is(AsmToken::Integer)) {
5847 if (parseIntToken(Type, "unexpected token in '.pseudoprobe' directive"))
5848 return true;
5849 }
5850
5851 if (getLexer().is(AsmToken::Integer)) {
5852 if (parseIntToken(Attr, "unexpected token in '.pseudoprobe' directive"))
5853 return true;
5854 }
5855
5856 // Parse inline stack like @ GUID:11:12 @ GUID:1:11 @ GUID:3:21
5857 MCPseudoProbeInlineStack InlineStack;
5858
5859 while (getLexer().is(AsmToken::At)) {
5860 // eat @
5861 Lex();
5862
5863 int64_t CallerGuid = 0;
5864 if (getLexer().is(AsmToken::Integer)) {
5865 if (parseIntToken(CallerGuid,
5866 "unexpected token in '.pseudoprobe' directive"))
5867 return true;
5868 }
5869
5870 // eat colon
5871 if (getLexer().is(AsmToken::Colon))
5872 Lex();
5873
5874 int64_t CallerProbeId = 0;
5875 if (getLexer().is(AsmToken::Integer)) {
5876 if (parseIntToken(CallerProbeId,
5877 "unexpected token in '.pseudoprobe' directive"))
5878 return true;
5879 }
5880
5881 InlineSite Site(CallerGuid, CallerProbeId);
5882 InlineStack.push_back(Site);
5883 }
5884
5885 if (parseEOL())
5886 return true;
5887
5888 getStreamer().emitPseudoProbe(Guid, Index, Type, Attr, InlineStack);
5889 return false;
5890}
5891
5892/// parseDirectiveLTODiscard
5893/// ::= ".lto_discard" [ identifier ( , identifier )* ]
5894/// The LTO library emits this directive to discard non-prevailing symbols.
5895/// We ignore symbol assignments and attribute changes for the specified
5896/// symbols.
5897bool AsmParser::parseDirectiveLTODiscard() {
5898 auto ParseOp = [&]() -> bool {
5899 StringRef Name;
5900 SMLoc Loc = getTok().getLoc();
5901 if (parseIdentifier(Name))
5902 return Error(Loc, "expected identifier");
5903 LTODiscardSymbols.insert(Name);
5904 return false;
5905 };
5906
5907 LTODiscardSymbols.clear();
5908 return parseMany(ParseOp);
5909}
5910
5911// We are comparing pointers, but the pointers are relative to a single string.
5912// Thus, this should always be deterministic.
5913static int rewritesSort(const AsmRewrite *AsmRewriteA,
5914 const AsmRewrite *AsmRewriteB) {
5915 if (AsmRewriteA->Loc.getPointer() < AsmRewriteB->Loc.getPointer())
5916 return -1;
5917 if (AsmRewriteB->Loc.getPointer() < AsmRewriteA->Loc.getPointer())
5918 return 1;
5919
5920 // It's possible to have a SizeDirective, Imm/ImmPrefix and an Input/Output
5921 // rewrite to the same location. Make sure the SizeDirective rewrite is
5922 // performed first, then the Imm/ImmPrefix and finally the Input/Output. This
5923 // ensures the sort algorithm is stable.
5924 if (AsmRewritePrecedence[AsmRewriteA->Kind] >
5925 AsmRewritePrecedence[AsmRewriteB->Kind])
5926 return -1;
5927
5928 if (AsmRewritePrecedence[AsmRewriteA->Kind] <
5929 AsmRewritePrecedence[AsmRewriteB->Kind])
5930 return 1;
5931 llvm_unreachable("Unstable rewrite sort.")__builtin_unreachable();
5932}
5933
5934bool AsmParser::parseMSInlineAsm(
5935 std::string &AsmString, unsigned &NumOutputs, unsigned &NumInputs,
5936 SmallVectorImpl<std::pair<void *, bool>> &OpDecls,
5937 SmallVectorImpl<std::string> &Constraints,
5938 SmallVectorImpl<std::string> &Clobbers, const MCInstrInfo *MII,
5939 const MCInstPrinter *IP, MCAsmParserSemaCallback &SI) {
5940 SmallVector<void *, 4> InputDecls;
5941 SmallVector<void *, 4> OutputDecls;
5942 SmallVector<bool, 4> InputDeclsAddressOf;
5943 SmallVector<bool, 4> OutputDeclsAddressOf;
5944 SmallVector<std::string, 4> InputConstraints;
5945 SmallVector<std::string, 4> OutputConstraints;
5946 SmallVector<unsigned, 4> ClobberRegs;
5947
5948 SmallVector<AsmRewrite, 4> AsmStrRewrites;
5949
5950 // Prime the lexer.
5951 Lex();
5952
5953 // While we have input, parse each statement.
5954 unsigned InputIdx = 0;
5955 unsigned OutputIdx = 0;
5956 while (getLexer().isNot(AsmToken::Eof)) {
5957 // Parse curly braces marking block start/end
5958 if (parseCurlyBlockScope(AsmStrRewrites))
5959 continue;
5960
5961 ParseStatementInfo Info(&AsmStrRewrites);
5962 bool StatementErr = parseStatement(Info, &SI);
5963
5964 if (StatementErr || Info.ParseError) {
5965 // Emit pending errors if any exist.
5966 printPendingErrors();
5967 return true;
5968 }
5969
5970 // No pending error should exist here.
5971 assert(!hasPendingError() && "unexpected error from parseStatement")(static_cast<void> (0));
5972
5973 if (Info.Opcode == ~0U)
5974 continue;
5975
5976 const MCInstrDesc &Desc = MII->get(Info.Opcode);
5977
5978 // Build the list of clobbers, outputs and inputs.
5979 for (unsigned i = 1, e = Info.ParsedOperands.size(); i != e; ++i) {
5980 MCParsedAsmOperand &Operand = *Info.ParsedOperands[i];
5981
5982 // Register operand.
5983 if (Operand.isReg() && !Operand.needAddressOf() &&
5984 !getTargetParser().OmitRegisterFromClobberLists(Operand.getReg())) {
5985 unsigned NumDefs = Desc.getNumDefs();
5986 // Clobber.
5987 if (NumDefs && Operand.getMCOperandNum() < NumDefs)
5988 ClobberRegs.push_back(Operand.getReg());
5989 continue;
5990 }
5991
5992 // Expr/Input or Output.
5993 StringRef SymName = Operand.getSymName();
5994 if (SymName.empty())
5995 continue;
5996
5997 void *OpDecl = Operand.getOpDecl();
5998 if (!OpDecl)
5999 continue;
6000
6001 StringRef Constraint = Operand.getConstraint();
6002 if (Operand.isImm()) {
6003 // Offset as immediate
6004 if (Operand.isOffsetOfLocal())
6005 Constraint = "r";
6006 else
6007 Constraint = "i";
6008 }
6009
6010 bool isOutput = (i == 1) && Desc.mayStore();
6011 SMLoc Start = SMLoc::getFromPointer(SymName.data());
6012 if (isOutput) {
6013 ++InputIdx;
6014 OutputDecls.push_back(OpDecl);
6015 OutputDeclsAddressOf.push_back(Operand.needAddressOf());
6016 OutputConstraints.push_back(("=" + Constraint).str());
6017 AsmStrRewrites.emplace_back(AOK_Output, Start, SymName.size());
6018 } else {
6019 InputDecls.push_back(OpDecl);
6020 InputDeclsAddressOf.push_back(Operand.needAddressOf());
6021 InputConstraints.push_back(Constraint.str());
6022 if (Desc.OpInfo[i - 1].isBranchTarget())
6023 AsmStrRewrites.emplace_back(AOK_CallInput, Start, SymName.size());
6024 else
6025 AsmStrRewrites.emplace_back(AOK_Input, Start, SymName.size());
6026 }
6027 }
6028
6029 // Consider implicit defs to be clobbers. Think of cpuid and push.
6030 ArrayRef<MCPhysReg> ImpDefs(Desc.getImplicitDefs(),
6031 Desc.getNumImplicitDefs());
6032 llvm::append_range(ClobberRegs, ImpDefs);
6033 }
6034
6035 // Set the number of Outputs and Inputs.
6036 NumOutputs = OutputDecls.size();
6037 NumInputs = InputDecls.size();
6038
6039 // Set the unique clobbers.
6040 array_pod_sort(ClobberRegs.begin(), ClobberRegs.end());
6041 ClobberRegs.erase(std::unique(ClobberRegs.begin(), ClobberRegs.end()),
6042 ClobberRegs.end());
6043 Clobbers.assign(ClobberRegs.size(), std::string());
6044 for (unsigned I = 0, E = ClobberRegs.size(); I != E; ++I) {
6045 raw_string_ostream OS(Clobbers[I]);
6046 IP->printRegName(OS, ClobberRegs[I]);
6047 }
6048
6049 // Merge the various outputs and inputs. Output are expected first.
6050 if (NumOutputs || NumInputs) {
6051 unsigned NumExprs = NumOutputs + NumInputs;
6052 OpDecls.resize(NumExprs);
6053 Constraints.resize(NumExprs);
6054 for (unsigned i = 0; i < NumOutputs; ++i) {
6055 OpDecls[i] = std::make_pair(OutputDecls[i], OutputDeclsAddressOf[i]);
6056 Constraints[i] = OutputConstraints[i];
6057 }
6058 for (unsigned i = 0, j = NumOutputs; i < NumInputs; ++i, ++j) {
6059 OpDecls[j] = std::make_pair(InputDecls[i], InputDeclsAddressOf[i]);