Bug Summary

File:llvm/lib/MC/MCParser/AsmParser.cpp
Warning:line 5917, column 3
1st function call argument is an uninitialized value

Annotated Source Code

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clang -cc1 -cc1 -triple x86_64-pc-linux-gnu -analyze -disable-free -clear-ast-before-backend -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 -ffp-contract=on -fno-rounding-math -mconstructor-aliases -funwind-tables=2 -target-cpu x86-64 -tune-cpu generic -debugger-tuning=gdb -ffunction-sections -fdata-sections -fcoverage-compilation-dir=/build/llvm-toolchain-snapshot-14~++20220118101002+ec47dba1c8a2/build-llvm -resource-dir /usr/lib/llvm-14/lib/clang/14.0.0 -D _DEBUG -D _GNU_SOURCE -D __STDC_CONSTANT_MACROS -D __STDC_FORMAT_MACROS -D __STDC_LIMIT_MACROS -I lib/MC/MCParser -I /build/llvm-toolchain-snapshot-14~++20220118101002+ec47dba1c8a2/llvm/lib/MC/MCParser -I include -I /build/llvm-toolchain-snapshot-14~++20220118101002+ec47dba1c8a2/llvm/include -D _FORTIFY_SOURCE=2 -D NDEBUG -U NDEBUG -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/10/../../../../include/x86_64-linux-gnu/c++/10 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10/backward -internal-isystem /usr/lib/llvm-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 -fmacro-prefix-map=/build/llvm-toolchain-snapshot-14~++20220118101002+ec47dba1c8a2/build-llvm=build-llvm -fmacro-prefix-map=/build/llvm-toolchain-snapshot-14~++20220118101002+ec47dba1c8a2/= -fcoverage-prefix-map=/build/llvm-toolchain-snapshot-14~++20220118101002+ec47dba1c8a2/build-llvm=build-llvm -fcoverage-prefix-map=/build/llvm-toolchain-snapshot-14~++20220118101002+ec47dba1c8a2/= -O3 -Wno-unused-command-line-argument -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~++20220118101002+ec47dba1c8a2/build-llvm -fdebug-prefix-map=/build/llvm-toolchain-snapshot-14~++20220118101002+ec47dba1c8a2/build-llvm=build-llvm -fdebug-prefix-map=/build/llvm-toolchain-snapshot-14~++20220118101002+ec47dba1c8a2/= -ferror-limit 19 -fvisibility-inlines-hidden -stack-protector 2 -fgnuc-version=4.2.1 -fcolor-diagnostics -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-2022-01-19-001817-16337-1 -x c++ /build/llvm-toolchain-snapshot-14~++20220118101002+ec47dba1c8a2/llvm/lib/MC/MCParser/AsmParser.cpp

/build/llvm-toolchain-snapshot-14~++20220118101002+ec47dba1c8a2/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() : LineNumber(0), 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 enum class AssignmentKind {
360 Set,
361 Equiv,
362 Equal,
363 LTOSetConditional,
364 };
365
366 bool parseAssignment(StringRef Name, AssignmentKind Kind);
367
368 unsigned getBinOpPrecedence(AsmToken::TokenKind K,
369 MCBinaryExpr::Opcode &Kind);
370
371 bool parseBinOpRHS(unsigned Precedence, const MCExpr *&Res, SMLoc &EndLoc);
372 bool parseParenExpr(const MCExpr *&Res, SMLoc &EndLoc);
373 bool parseBracketExpr(const MCExpr *&Res, SMLoc &EndLoc);
374
375 bool parseRegisterOrRegisterNumber(int64_t &Register, SMLoc DirectiveLoc);
376
377 bool parseCVFunctionId(int64_t &FunctionId, StringRef DirectiveName);
378 bool parseCVFileId(int64_t &FileId, StringRef DirectiveName);
379
380 // Generic (target and platform independent) directive parsing.
381 enum DirectiveKind {
382 DK_NO_DIRECTIVE, // Placeholder
383 DK_SET,
384 DK_EQU,
385 DK_EQUIV,
386 DK_ASCII,
387 DK_ASCIZ,
388 DK_STRING,
389 DK_BYTE,
390 DK_SHORT,
391 DK_RELOC,
392 DK_VALUE,
393 DK_2BYTE,
394 DK_LONG,
395 DK_INT,
396 DK_4BYTE,
397 DK_QUAD,
398 DK_8BYTE,
399 DK_OCTA,
400 DK_DC,
401 DK_DC_A,
402 DK_DC_B,
403 DK_DC_D,
404 DK_DC_L,
405 DK_DC_S,
406 DK_DC_W,
407 DK_DC_X,
408 DK_DCB,
409 DK_DCB_B,
410 DK_DCB_D,
411 DK_DCB_L,
412 DK_DCB_S,
413 DK_DCB_W,
414 DK_DCB_X,
415 DK_DS,
416 DK_DS_B,
417 DK_DS_D,
418 DK_DS_L,
419 DK_DS_P,
420 DK_DS_S,
421 DK_DS_W,
422 DK_DS_X,
423 DK_SINGLE,
424 DK_FLOAT,
425 DK_DOUBLE,
426 DK_ALIGN,
427 DK_ALIGN32,
428 DK_BALIGN,
429 DK_BALIGNW,
430 DK_BALIGNL,
431 DK_P2ALIGN,
432 DK_P2ALIGNW,
433 DK_P2ALIGNL,
434 DK_ORG,
435 DK_FILL,
436 DK_ENDR,
437 DK_BUNDLE_ALIGN_MODE,
438 DK_BUNDLE_LOCK,
439 DK_BUNDLE_UNLOCK,
440 DK_ZERO,
441 DK_EXTERN,
442 DK_GLOBL,
443 DK_GLOBAL,
444 DK_LAZY_REFERENCE,
445 DK_NO_DEAD_STRIP,
446 DK_SYMBOL_RESOLVER,
447 DK_PRIVATE_EXTERN,
448 DK_REFERENCE,
449 DK_WEAK_DEFINITION,
450 DK_WEAK_REFERENCE,
451 DK_WEAK_DEF_CAN_BE_HIDDEN,
452 DK_COLD,
453 DK_COMM,
454 DK_COMMON,
455 DK_LCOMM,
456 DK_ABORT,
457 DK_INCLUDE,
458 DK_INCBIN,
459 DK_CODE16,
460 DK_CODE16GCC,
461 DK_REPT,
462 DK_IRP,
463 DK_IRPC,
464 DK_IF,
465 DK_IFEQ,
466 DK_IFGE,
467 DK_IFGT,
468 DK_IFLE,
469 DK_IFLT,
470 DK_IFNE,
471 DK_IFB,
472 DK_IFNB,
473 DK_IFC,
474 DK_IFEQS,
475 DK_IFNC,
476 DK_IFNES,
477 DK_IFDEF,
478 DK_IFNDEF,
479 DK_IFNOTDEF,
480 DK_ELSEIF,
481 DK_ELSE,
482 DK_ENDIF,
483 DK_SPACE,
484 DK_SKIP,
485 DK_FILE,
486 DK_LINE,
487 DK_LOC,
488 DK_STABS,
489 DK_CV_FILE,
490 DK_CV_FUNC_ID,
491 DK_CV_INLINE_SITE_ID,
492 DK_CV_LOC,
493 DK_CV_LINETABLE,
494 DK_CV_INLINE_LINETABLE,
495 DK_CV_DEF_RANGE,
496 DK_CV_STRINGTABLE,
497 DK_CV_STRING,
498 DK_CV_FILECHECKSUMS,
499 DK_CV_FILECHECKSUM_OFFSET,
500 DK_CV_FPO_DATA,
501 DK_CFI_SECTIONS,
502 DK_CFI_STARTPROC,
503 DK_CFI_ENDPROC,
504 DK_CFI_DEF_CFA,
505 DK_CFI_DEF_CFA_OFFSET,
506 DK_CFI_ADJUST_CFA_OFFSET,
507 DK_CFI_DEF_CFA_REGISTER,
508 DK_CFI_LLVM_DEF_ASPACE_CFA,
509 DK_CFI_OFFSET,
510 DK_CFI_REL_OFFSET,
511 DK_CFI_PERSONALITY,
512 DK_CFI_LSDA,
513 DK_CFI_REMEMBER_STATE,
514 DK_CFI_RESTORE_STATE,
515 DK_CFI_SAME_VALUE,
516 DK_CFI_RESTORE,
517 DK_CFI_ESCAPE,
518 DK_CFI_RETURN_COLUMN,
519 DK_CFI_SIGNAL_FRAME,
520 DK_CFI_UNDEFINED,
521 DK_CFI_REGISTER,
522 DK_CFI_WINDOW_SAVE,
523 DK_CFI_B_KEY_FRAME,
524 DK_MACROS_ON,
525 DK_MACROS_OFF,
526 DK_ALTMACRO,
527 DK_NOALTMACRO,
528 DK_MACRO,
529 DK_EXITM,
530 DK_ENDM,
531 DK_ENDMACRO,
532 DK_PURGEM,
533 DK_SLEB128,
534 DK_ULEB128,
535 DK_ERR,
536 DK_ERROR,
537 DK_WARNING,
538 DK_PRINT,
539 DK_ADDRSIG,
540 DK_ADDRSIG_SYM,
541 DK_PSEUDO_PROBE,
542 DK_LTO_DISCARD,
543 DK_LTO_SET_CONDITIONAL,
544 DK_END
545 };
546
547 /// Maps directive name --> DirectiveKind enum, for
548 /// directives parsed by this class.
549 StringMap<DirectiveKind> DirectiveKindMap;
550
551 // Codeview def_range type parsing.
552 enum CVDefRangeType {
553 CVDR_DEFRANGE = 0, // Placeholder
554 CVDR_DEFRANGE_REGISTER,
555 CVDR_DEFRANGE_FRAMEPOINTER_REL,
556 CVDR_DEFRANGE_SUBFIELD_REGISTER,
557 CVDR_DEFRANGE_REGISTER_REL
558 };
559
560 /// Maps Codeview def_range types --> CVDefRangeType enum, for
561 /// Codeview def_range types parsed by this class.
562 StringMap<CVDefRangeType> CVDefRangeTypeMap;
563
564 // ".ascii", ".asciz", ".string"
565 bool parseDirectiveAscii(StringRef IDVal, bool ZeroTerminated);
566 bool parseDirectiveReloc(SMLoc DirectiveLoc); // ".reloc"
567 bool parseDirectiveValue(StringRef IDVal,
568 unsigned Size); // ".byte", ".long", ...
569 bool parseDirectiveOctaValue(StringRef IDVal); // ".octa", ...
570 bool parseDirectiveRealValue(StringRef IDVal,
571 const fltSemantics &); // ".single", ...
572 bool parseDirectiveFill(); // ".fill"
573 bool parseDirectiveZero(); // ".zero"
574 // ".set", ".equ", ".equiv", ".lto_set_conditional"
575 bool parseDirectiveSet(StringRef IDVal, AssignmentKind Kind);
576 bool parseDirectiveOrg(); // ".org"
577 // ".align{,32}", ".p2align{,w,l}"
578 bool parseDirectiveAlign(bool IsPow2, unsigned ValueSize);
579
580 // ".file", ".line", ".loc", ".stabs"
581 bool parseDirectiveFile(SMLoc DirectiveLoc);
582 bool parseDirectiveLine();
583 bool parseDirectiveLoc();
584 bool parseDirectiveStabs();
585
586 // ".cv_file", ".cv_func_id", ".cv_inline_site_id", ".cv_loc", ".cv_linetable",
587 // ".cv_inline_linetable", ".cv_def_range", ".cv_string"
588 bool parseDirectiveCVFile();
589 bool parseDirectiveCVFuncId();
590 bool parseDirectiveCVInlineSiteId();
591 bool parseDirectiveCVLoc();
592 bool parseDirectiveCVLinetable();
593 bool parseDirectiveCVInlineLinetable();
594 bool parseDirectiveCVDefRange();
595 bool parseDirectiveCVString();
596 bool parseDirectiveCVStringTable();
597 bool parseDirectiveCVFileChecksums();
598 bool parseDirectiveCVFileChecksumOffset();
599 bool parseDirectiveCVFPOData();
600
601 // .cfi directives
602 bool parseDirectiveCFIRegister(SMLoc DirectiveLoc);
603 bool parseDirectiveCFIWindowSave();
604 bool parseDirectiveCFISections();
605 bool parseDirectiveCFIStartProc();
606 bool parseDirectiveCFIEndProc();
607 bool parseDirectiveCFIDefCfaOffset();
608 bool parseDirectiveCFIDefCfa(SMLoc DirectiveLoc);
609 bool parseDirectiveCFIAdjustCfaOffset();
610 bool parseDirectiveCFIDefCfaRegister(SMLoc DirectiveLoc);
611 bool parseDirectiveCFILLVMDefAspaceCfa(SMLoc DirectiveLoc);
612 bool parseDirectiveCFIOffset(SMLoc DirectiveLoc);
613 bool parseDirectiveCFIRelOffset(SMLoc DirectiveLoc);
614 bool parseDirectiveCFIPersonalityOrLsda(bool IsPersonality);
615 bool parseDirectiveCFIRememberState();
616 bool parseDirectiveCFIRestoreState();
617 bool parseDirectiveCFISameValue(SMLoc DirectiveLoc);
618 bool parseDirectiveCFIRestore(SMLoc DirectiveLoc);
619 bool parseDirectiveCFIEscape();
620 bool parseDirectiveCFIReturnColumn(SMLoc DirectiveLoc);
621 bool parseDirectiveCFISignalFrame();
622 bool parseDirectiveCFIUndefined(SMLoc DirectiveLoc);
623
624 // macro directives
625 bool parseDirectivePurgeMacro(SMLoc DirectiveLoc);
626 bool parseDirectiveExitMacro(StringRef Directive);
627 bool parseDirectiveEndMacro(StringRef Directive);
628 bool parseDirectiveMacro(SMLoc DirectiveLoc);
629 bool parseDirectiveMacrosOnOff(StringRef Directive);
630 // alternate macro mode directives
631 bool parseDirectiveAltmacro(StringRef Directive);
632 // ".bundle_align_mode"
633 bool parseDirectiveBundleAlignMode();
634 // ".bundle_lock"
635 bool parseDirectiveBundleLock();
636 // ".bundle_unlock"
637 bool parseDirectiveBundleUnlock();
638
639 // ".space", ".skip"
640 bool parseDirectiveSpace(StringRef IDVal);
641
642 // ".dcb"
643 bool parseDirectiveDCB(StringRef IDVal, unsigned Size);
644 bool parseDirectiveRealDCB(StringRef IDVal, const fltSemantics &);
645 // ".ds"
646 bool parseDirectiveDS(StringRef IDVal, unsigned Size);
647
648 // .sleb128 (Signed=true) and .uleb128 (Signed=false)
649 bool parseDirectiveLEB128(bool Signed);
650
651 /// Parse a directive like ".globl" which
652 /// accepts a single symbol (which should be a label or an external).
653 bool parseDirectiveSymbolAttribute(MCSymbolAttr Attr);
654
655 bool parseDirectiveComm(bool IsLocal); // ".comm" and ".lcomm"
656
657 bool parseDirectiveAbort(); // ".abort"
658 bool parseDirectiveInclude(); // ".include"
659 bool parseDirectiveIncbin(); // ".incbin"
660
661 // ".if", ".ifeq", ".ifge", ".ifgt" , ".ifle", ".iflt" or ".ifne"
662 bool parseDirectiveIf(SMLoc DirectiveLoc, DirectiveKind DirKind);
663 // ".ifb" or ".ifnb", depending on ExpectBlank.
664 bool parseDirectiveIfb(SMLoc DirectiveLoc, bool ExpectBlank);
665 // ".ifc" or ".ifnc", depending on ExpectEqual.
666 bool parseDirectiveIfc(SMLoc DirectiveLoc, bool ExpectEqual);
667 // ".ifeqs" or ".ifnes", depending on ExpectEqual.
668 bool parseDirectiveIfeqs(SMLoc DirectiveLoc, bool ExpectEqual);
669 // ".ifdef" or ".ifndef", depending on expect_defined
670 bool parseDirectiveIfdef(SMLoc DirectiveLoc, bool expect_defined);
671 bool parseDirectiveElseIf(SMLoc DirectiveLoc); // ".elseif"
672 bool parseDirectiveElse(SMLoc DirectiveLoc); // ".else"
673 bool parseDirectiveEndIf(SMLoc DirectiveLoc); // .endif
674 bool parseEscapedString(std::string &Data) override;
675 bool parseAngleBracketString(std::string &Data) override;
676
677 const MCExpr *applyModifierToExpr(const MCExpr *E,
678 MCSymbolRefExpr::VariantKind Variant);
679
680 // Macro-like directives
681 MCAsmMacro *parseMacroLikeBody(SMLoc DirectiveLoc);
682 void instantiateMacroLikeBody(MCAsmMacro *M, SMLoc DirectiveLoc,
683 raw_svector_ostream &OS);
684 bool parseDirectiveRept(SMLoc DirectiveLoc, StringRef Directive);
685 bool parseDirectiveIrp(SMLoc DirectiveLoc); // ".irp"
686 bool parseDirectiveIrpc(SMLoc DirectiveLoc); // ".irpc"
687 bool parseDirectiveEndr(SMLoc DirectiveLoc); // ".endr"
688
689 // "_emit" or "__emit"
690 bool parseDirectiveMSEmit(SMLoc DirectiveLoc, ParseStatementInfo &Info,
691 size_t Len);
692
693 // "align"
694 bool parseDirectiveMSAlign(SMLoc DirectiveLoc, ParseStatementInfo &Info);
695
696 // "end"
697 bool parseDirectiveEnd(SMLoc DirectiveLoc);
698
699 // ".err" or ".error"
700 bool parseDirectiveError(SMLoc DirectiveLoc, bool WithMessage);
701
702 // ".warning"
703 bool parseDirectiveWarning(SMLoc DirectiveLoc);
704
705 // .print <double-quotes-string>
706 bool parseDirectivePrint(SMLoc DirectiveLoc);
707
708 // .pseudoprobe
709 bool parseDirectivePseudoProbe();
710
711 // ".lto_discard"
712 bool parseDirectiveLTODiscard();
713
714 // Directives to support address-significance tables.
715 bool parseDirectiveAddrsig();
716 bool parseDirectiveAddrsigSym();
717
718 void initializeDirectiveKindMap();
719 void initializeCVDefRangeTypeMap();
720};
721
722class HLASMAsmParser final : public AsmParser {
723private:
724 MCAsmLexer &Lexer;
725 MCStreamer &Out;
726
727 void lexLeadingSpaces() {
728 while (Lexer.is(AsmToken::Space))
729 Lexer.Lex();
730 }
731
732 bool parseAsHLASMLabel(ParseStatementInfo &Info, MCAsmParserSemaCallback *SI);
733 bool parseAsMachineInstruction(ParseStatementInfo &Info,
734 MCAsmParserSemaCallback *SI);
735
736public:
737 HLASMAsmParser(SourceMgr &SM, MCContext &Ctx, MCStreamer &Out,
738 const MCAsmInfo &MAI, unsigned CB = 0)
739 : AsmParser(SM, Ctx, Out, MAI, CB), Lexer(getLexer()), Out(Out) {
740 Lexer.setSkipSpace(false);
741 Lexer.setAllowHashInIdentifier(true);
742 Lexer.setLexHLASMIntegers(true);
743 Lexer.setLexHLASMStrings(true);
744 }
745
746 ~HLASMAsmParser() { Lexer.setSkipSpace(true); }
747
748 bool parseStatement(ParseStatementInfo &Info,
749 MCAsmParserSemaCallback *SI) override;
750};
751
752} // end anonymous namespace
753
754namespace llvm {
755
756extern MCAsmParserExtension *createDarwinAsmParser();
757extern MCAsmParserExtension *createELFAsmParser();
758extern MCAsmParserExtension *createCOFFAsmParser();
759extern MCAsmParserExtension *createGOFFAsmParser();
760extern MCAsmParserExtension *createXCOFFAsmParser();
761extern MCAsmParserExtension *createWasmAsmParser();
762
763} // end namespace llvm
764
765enum { DEFAULT_ADDRSPACE = 0 };
766
767AsmParser::AsmParser(SourceMgr &SM, MCContext &Ctx, MCStreamer &Out,
768 const MCAsmInfo &MAI, unsigned CB = 0)
769 : Lexer(MAI), Ctx(Ctx), Out(Out), MAI(MAI), SrcMgr(SM),
770 CurBuffer(CB ? CB : SM.getMainFileID()), MacrosEnabledFlag(true) {
771 HadError = false;
772 // Save the old handler.
773 SavedDiagHandler = SrcMgr.getDiagHandler();
774 SavedDiagContext = SrcMgr.getDiagContext();
775 // Set our own handler which calls the saved handler.
776 SrcMgr.setDiagHandler(DiagHandler, this);
777 Lexer.setBuffer(SrcMgr.getMemoryBuffer(CurBuffer)->getBuffer());
778 // Make MCStreamer aware of the StartTokLoc for locations in diagnostics.
779 Out.setStartTokLocPtr(&StartTokLoc);
780
781 // Initialize the platform / file format parser.
782 switch (Ctx.getObjectFileType()) {
783 case MCContext::IsCOFF:
784 PlatformParser.reset(createCOFFAsmParser());
785 break;
786 case MCContext::IsMachO:
787 PlatformParser.reset(createDarwinAsmParser());
788 IsDarwin = true;
789 break;
790 case MCContext::IsELF:
791 PlatformParser.reset(createELFAsmParser());
792 break;
793 case MCContext::IsGOFF:
794 PlatformParser.reset(createGOFFAsmParser());
795 break;
796 case MCContext::IsWasm:
797 PlatformParser.reset(createWasmAsmParser());
798 break;
799 case MCContext::IsXCOFF:
800 PlatformParser.reset(createXCOFFAsmParser());
801 break;
802 }
803
804 PlatformParser->Initialize(*this);
805 initializeDirectiveKindMap();
806 initializeCVDefRangeTypeMap();
807
808 NumOfMacroInstantiations = 0;
809}
810
811AsmParser::~AsmParser() {
812 assert((HadError || ActiveMacros.empty()) &&(static_cast <bool> ((HadError || ActiveMacros.empty())
&& "Unexpected active macro instantiation!") ? void (
0) : __assert_fail ("(HadError || ActiveMacros.empty()) && \"Unexpected active macro instantiation!\""
, "llvm/lib/MC/MCParser/AsmParser.cpp", 813, __extension__ __PRETTY_FUNCTION__
))
813 "Unexpected active macro instantiation!")(static_cast <bool> ((HadError || ActiveMacros.empty())
&& "Unexpected active macro instantiation!") ? void (
0) : __assert_fail ("(HadError || ActiveMacros.empty()) && \"Unexpected active macro instantiation!\""
, "llvm/lib/MC/MCParser/AsmParser.cpp", 813, __extension__ __PRETTY_FUNCTION__
))
;
814
815 // Remove MCStreamer's reference to the parser SMLoc.
816 Out.setStartTokLocPtr(nullptr);
817 // Restore the saved diagnostics handler and context for use during
818 // finalization.
819 SrcMgr.setDiagHandler(SavedDiagHandler, SavedDiagContext);
820}
821
822void AsmParser::printMacroInstantiations() {
823 // Print the active macro instantiation stack.
824 for (std::vector<MacroInstantiation *>::const_reverse_iterator
825 it = ActiveMacros.rbegin(),
826 ie = ActiveMacros.rend();
827 it != ie; ++it)
828 printMessage((*it)->InstantiationLoc, SourceMgr::DK_Note,
829 "while in macro instantiation");
830}
831
832void AsmParser::Note(SMLoc L, const Twine &Msg, SMRange Range) {
833 printPendingErrors();
834 printMessage(L, SourceMgr::DK_Note, Msg, Range);
835 printMacroInstantiations();
836}
837
838bool AsmParser::Warning(SMLoc L, const Twine &Msg, SMRange Range) {
839 if(getTargetParser().getTargetOptions().MCNoWarn)
840 return false;
841 if (getTargetParser().getTargetOptions().MCFatalWarnings)
842 return Error(L, Msg, Range);
843 printMessage(L, SourceMgr::DK_Warning, Msg, Range);
844 printMacroInstantiations();
845 return false;
846}
847
848bool AsmParser::printError(SMLoc L, const Twine &Msg, SMRange Range) {
849 HadError = true;
850 printMessage(L, SourceMgr::DK_Error, Msg, Range);
851 printMacroInstantiations();
852 return true;
853}
854
855bool AsmParser::enterIncludeFile(const std::string &Filename) {
856 std::string IncludedFile;
857 unsigned NewBuf =
858 SrcMgr.AddIncludeFile(Filename, Lexer.getLoc(), IncludedFile);
859 if (!NewBuf)
860 return true;
861
862 CurBuffer = NewBuf;
863 Lexer.setBuffer(SrcMgr.getMemoryBuffer(CurBuffer)->getBuffer());
864 return false;
865}
866
867/// Process the specified .incbin file by searching for it in the include paths
868/// then just emitting the byte contents of the file to the streamer. This
869/// returns true on failure.
870bool AsmParser::processIncbinFile(const std::string &Filename, int64_t Skip,
871 const MCExpr *Count, SMLoc Loc) {
872 std::string IncludedFile;
873 unsigned NewBuf =
874 SrcMgr.AddIncludeFile(Filename, Lexer.getLoc(), IncludedFile);
875 if (!NewBuf)
876 return true;
877
878 // Pick up the bytes from the file and emit them.
879 StringRef Bytes = SrcMgr.getMemoryBuffer(NewBuf)->getBuffer();
880 Bytes = Bytes.drop_front(Skip);
881 if (Count) {
882 int64_t Res;
883 if (!Count->evaluateAsAbsolute(Res, getStreamer().getAssemblerPtr()))
884 return Error(Loc, "expected absolute expression");
885 if (Res < 0)
886 return Warning(Loc, "negative count has no effect");
887 Bytes = Bytes.take_front(Res);
888 }
889 getStreamer().emitBytes(Bytes);
890 return false;
891}
892
893void AsmParser::jumpToLoc(SMLoc Loc, unsigned InBuffer) {
894 CurBuffer = InBuffer ? InBuffer : SrcMgr.FindBufferContainingLoc(Loc);
895 Lexer.setBuffer(SrcMgr.getMemoryBuffer(CurBuffer)->getBuffer(),
896 Loc.getPointer());
897}
898
899const AsmToken &AsmParser::Lex() {
900 if (Lexer.getTok().is(AsmToken::Error))
901 Error(Lexer.getErrLoc(), Lexer.getErr());
902
903 // if it's a end of statement with a comment in it
904 if (getTok().is(AsmToken::EndOfStatement)) {
905 // if this is a line comment output it.
906 if (!getTok().getString().empty() && getTok().getString().front() != '\n' &&
907 getTok().getString().front() != '\r' && MAI.preserveAsmComments())
908 Out.addExplicitComment(Twine(getTok().getString()));
909 }
910
911 const AsmToken *tok = &Lexer.Lex();
912
913 // Parse comments here to be deferred until end of next statement.
914 while (tok->is(AsmToken::Comment)) {
915 if (MAI.preserveAsmComments())
916 Out.addExplicitComment(Twine(tok->getString()));
917 tok = &Lexer.Lex();
918 }
919
920 if (tok->is(AsmToken::Eof)) {
921 // If this is the end of an included file, pop the parent file off the
922 // include stack.
923 SMLoc ParentIncludeLoc = SrcMgr.getParentIncludeLoc(CurBuffer);
924 if (ParentIncludeLoc != SMLoc()) {
925 jumpToLoc(ParentIncludeLoc);
926 return Lex();
927 }
928 }
929
930 return *tok;
931}
932
933bool AsmParser::enabledGenDwarfForAssembly() {
934 // Check whether the user specified -g.
935 if (!getContext().getGenDwarfForAssembly())
936 return false;
937 // If we haven't encountered any .file directives (which would imply that
938 // the assembler source was produced with debug info already) then emit one
939 // describing the assembler source file itself.
940 if (getContext().getGenDwarfFileNumber() == 0) {
941 // Use the first #line directive for this, if any. It's preprocessed, so
942 // there is no checksum, and of course no source directive.
943 if (!FirstCppHashFilename.empty())
944 getContext().setMCLineTableRootFile(/*CUID=*/0,
945 getContext().getCompilationDir(),
946 FirstCppHashFilename,
947 /*Cksum=*/None, /*Source=*/None);
948 const MCDwarfFile &RootFile =
949 getContext().getMCDwarfLineTable(/*CUID=*/0).getRootFile();
950 getContext().setGenDwarfFileNumber(getStreamer().emitDwarfFileDirective(
951 /*CUID=*/0, getContext().getCompilationDir(), RootFile.Name,
952 RootFile.Checksum, RootFile.Source));
953 }
954 return true;
955}
956
957bool AsmParser::Run(bool NoInitialTextSection, bool NoFinalize) {
958 LTODiscardSymbols.clear();
959
960 // Create the initial section, if requested.
961 if (!NoInitialTextSection)
962 Out.initSections(false, getTargetParser().getSTI());
963
964 // Prime the lexer.
965 Lex();
966
967 HadError = false;
968 AsmCond StartingCondState = TheCondState;
969 SmallVector<AsmRewrite, 4> AsmStrRewrites;
970
971 // If we are generating dwarf for assembly source files save the initial text
972 // section. (Don't use enabledGenDwarfForAssembly() here, as we aren't
973 // emitting any actual debug info yet and haven't had a chance to parse any
974 // embedded .file directives.)
975 if (getContext().getGenDwarfForAssembly()) {
976 MCSection *Sec = getStreamer().getCurrentSectionOnly();
977 if (!Sec->getBeginSymbol()) {
978 MCSymbol *SectionStartSym = getContext().createTempSymbol();
979 getStreamer().emitLabel(SectionStartSym);
980 Sec->setBeginSymbol(SectionStartSym);
981 }
982 bool InsertResult = getContext().addGenDwarfSection(Sec);
983 assert(InsertResult && ".text section should not have debug info yet")(static_cast <bool> (InsertResult && ".text section should not have debug info yet"
) ? void (0) : __assert_fail ("InsertResult && \".text section should not have debug info yet\""
, "llvm/lib/MC/MCParser/AsmParser.cpp", 983, __extension__ __PRETTY_FUNCTION__
))
;
984 (void)InsertResult;
985 }
986
987 getTargetParser().onBeginOfFile();
988
989 // While we have input, parse each statement.
990 while (Lexer.isNot(AsmToken::Eof)) {
991 ParseStatementInfo Info(&AsmStrRewrites);
992 bool Parsed = parseStatement(Info, nullptr);
993
994 // If we have a Lexer Error we are on an Error Token. Load in Lexer Error
995 // for printing ErrMsg via Lex() only if no (presumably better) parser error
996 // exists.
997 if (Parsed && !hasPendingError() && Lexer.getTok().is(AsmToken::Error)) {
998 Lex();
999 }
1000
1001 // parseStatement returned true so may need to emit an error.
1002 printPendingErrors();
1003
1004 // Skipping to the next line if needed.
1005 if (Parsed && !getLexer().isAtStartOfStatement())
1006 eatToEndOfStatement();
1007 }
1008
1009 getTargetParser().onEndOfFile();
1010 printPendingErrors();
1011
1012 // All errors should have been emitted.
1013 assert(!hasPendingError() && "unexpected error from parseStatement")(static_cast <bool> (!hasPendingError() && "unexpected error from parseStatement"
) ? void (0) : __assert_fail ("!hasPendingError() && \"unexpected error from parseStatement\""
, "llvm/lib/MC/MCParser/AsmParser.cpp", 1013, __extension__ __PRETTY_FUNCTION__
))
;
1014
1015 getTargetParser().flushPendingInstructions(getStreamer());
1016
1017 if (TheCondState.TheCond != StartingCondState.TheCond ||
1018 TheCondState.Ignore != StartingCondState.Ignore)
1019 printError(getTok().getLoc(), "unmatched .ifs or .elses");
1020 // Check to see there are no empty DwarfFile slots.
1021 const auto &LineTables = getContext().getMCDwarfLineTables();
1022 if (!LineTables.empty()) {
1023 unsigned Index = 0;
1024 for (const auto &File : LineTables.begin()->second.getMCDwarfFiles()) {
1025 if (File.Name.empty() && Index != 0)
1026 printError(getTok().getLoc(), "unassigned file number: " +
1027 Twine(Index) +
1028 " for .file directives");
1029 ++Index;
1030 }
1031 }
1032
1033 // Check to see that all assembler local symbols were actually defined.
1034 // Targets that don't do subsections via symbols may not want this, though,
1035 // so conservatively exclude them. Only do this if we're finalizing, though,
1036 // as otherwise we won't necessarilly have seen everything yet.
1037 if (!NoFinalize) {
1038 if (MAI.hasSubsectionsViaSymbols()) {
1039 for (const auto &TableEntry : getContext().getSymbols()) {
1040 MCSymbol *Sym = TableEntry.getValue();
1041 // Variable symbols may not be marked as defined, so check those
1042 // explicitly. If we know it's a variable, we have a definition for
1043 // the purposes of this check.
1044 if (Sym->isTemporary() && !Sym->isVariable() && !Sym->isDefined())
1045 // FIXME: We would really like to refer back to where the symbol was
1046 // first referenced for a source location. We need to add something
1047 // to track that. Currently, we just point to the end of the file.
1048 printError(getTok().getLoc(), "assembler local symbol '" +
1049 Sym->getName() + "' not defined");
1050 }
1051 }
1052
1053 // Temporary symbols like the ones for directional jumps don't go in the
1054 // symbol table. They also need to be diagnosed in all (final) cases.
1055 for (std::tuple<SMLoc, CppHashInfoTy, MCSymbol *> &LocSym : DirLabels) {
1056 if (std::get<2>(LocSym)->isUndefined()) {
1057 // Reset the state of any "# line file" directives we've seen to the
1058 // context as it was at the diagnostic site.
1059 CppHashInfo = std::get<1>(LocSym);
1060 printError(std::get<0>(LocSym), "directional label undefined");
1061 }
1062 }
1063 }
1064 // Finalize the output stream if there are no errors and if the client wants
1065 // us to.
1066 if (!HadError && !NoFinalize) {
1067 if (auto *TS = Out.getTargetStreamer())
1068 TS->emitConstantPools();
1069
1070 Out.Finish(Lexer.getLoc());
1071 }
1072
1073 return HadError || getContext().hadError();
1074}
1075
1076bool AsmParser::checkForValidSection() {
1077 if (!ParsingMSInlineAsm && !getStreamer().getCurrentSectionOnly()) {
1078 Out.initSections(false, getTargetParser().getSTI());
1079 return Error(getTok().getLoc(),
1080 "expected section directive before assembly directive");
1081 }
1082 return false;
1083}
1084
1085/// Throw away the rest of the line for testing purposes.
1086void AsmParser::eatToEndOfStatement() {
1087 while (Lexer.isNot(AsmToken::EndOfStatement) && Lexer.isNot(AsmToken::Eof))
1088 Lexer.Lex();
1089
1090 // Eat EOL.
1091 if (Lexer.is(AsmToken::EndOfStatement))
1092 Lexer.Lex();
1093}
1094
1095StringRef AsmParser::parseStringToEndOfStatement() {
1096 const char *Start = getTok().getLoc().getPointer();
1097
1098 while (Lexer.isNot(AsmToken::EndOfStatement) && Lexer.isNot(AsmToken::Eof))
1099 Lexer.Lex();
1100
1101 const char *End = getTok().getLoc().getPointer();
1102 return StringRef(Start, End - Start);
1103}
1104
1105StringRef AsmParser::parseStringToComma() {
1106 const char *Start = getTok().getLoc().getPointer();
1107
1108 while (Lexer.isNot(AsmToken::EndOfStatement) &&
1109 Lexer.isNot(AsmToken::Comma) && Lexer.isNot(AsmToken::Eof))
1110 Lexer.Lex();
1111
1112 const char *End = getTok().getLoc().getPointer();
1113 return StringRef(Start, End - Start);
1114}
1115
1116/// Parse a paren expression and return it.
1117/// NOTE: This assumes the leading '(' has already been consumed.
1118///
1119/// parenexpr ::= expr)
1120///
1121bool AsmParser::parseParenExpr(const MCExpr *&Res, SMLoc &EndLoc) {
1122 if (parseExpression(Res))
1123 return true;
1124 if (Lexer.isNot(AsmToken::RParen))
1125 return TokError("expected ')' in parentheses expression");
1126 EndLoc = Lexer.getTok().getEndLoc();
1127 Lex();
1128 return false;
1129}
1130
1131/// Parse a bracket expression and return it.
1132/// NOTE: This assumes the leading '[' has already been consumed.
1133///
1134/// bracketexpr ::= expr]
1135///
1136bool AsmParser::parseBracketExpr(const MCExpr *&Res, SMLoc &EndLoc) {
1137 if (parseExpression(Res))
1138 return true;
1139 EndLoc = getTok().getEndLoc();
1140 if (parseToken(AsmToken::RBrac, "expected ']' in brackets expression"))
1141 return true;
1142 return false;
1143}
1144
1145/// Parse a primary expression and return it.
1146/// primaryexpr ::= (parenexpr
1147/// primaryexpr ::= symbol
1148/// primaryexpr ::= number
1149/// primaryexpr ::= '.'
1150/// primaryexpr ::= ~,+,- primaryexpr
1151bool AsmParser::parsePrimaryExpr(const MCExpr *&Res, SMLoc &EndLoc,
1152 AsmTypeInfo *TypeInfo) {
1153 SMLoc FirstTokenLoc = getLexer().getLoc();
1154 AsmToken::TokenKind FirstTokenKind = Lexer.getKind();
1155 switch (FirstTokenKind) {
1156 default:
1157 return TokError("unknown token in expression");
1158 // If we have an error assume that we've already handled it.
1159 case AsmToken::Error:
1160 return true;
1161 case AsmToken::Exclaim:
1162 Lex(); // Eat the operator.
1163 if (parsePrimaryExpr(Res, EndLoc, TypeInfo))
1164 return true;
1165 Res = MCUnaryExpr::createLNot(Res, getContext(), FirstTokenLoc);
1166 return false;
1167 case AsmToken::Dollar:
1168 case AsmToken::Star:
1169 case AsmToken::At:
1170 case AsmToken::String:
1171 case AsmToken::Identifier: {
1172 StringRef Identifier;
1173 if (parseIdentifier(Identifier)) {
1174 // We may have failed but '$'|'*' may be a valid token in context of
1175 // the current PC.
1176 if (getTok().is(AsmToken::Dollar) || getTok().is(AsmToken::Star)) {
1177 bool ShouldGenerateTempSymbol = false;
1178 if ((getTok().is(AsmToken::Dollar) && MAI.getDollarIsPC()) ||
1179 (getTok().is(AsmToken::Star) && MAI.getStarIsPC()))
1180 ShouldGenerateTempSymbol = true;
1181
1182 if (!ShouldGenerateTempSymbol)
1183 return Error(FirstTokenLoc, "invalid token in expression");
1184
1185 // Eat the '$'|'*' token.
1186 Lex();
1187 // This is either a '$'|'*' reference, which references the current PC.
1188 // Emit a temporary label to the streamer and refer to it.
1189 MCSymbol *Sym = Ctx.createTempSymbol();
1190 Out.emitLabel(Sym);
1191 Res = MCSymbolRefExpr::create(Sym, MCSymbolRefExpr::VK_None,
1192 getContext());
1193 EndLoc = FirstTokenLoc;
1194 return false;
1195 }
1196 }
1197 // Parse symbol variant
1198 std::pair<StringRef, StringRef> Split;
1199 if (!MAI.useParensForSymbolVariant()) {
1200 if (FirstTokenKind == AsmToken::String) {
1201 if (Lexer.is(AsmToken::At)) {
1202 Lex(); // eat @
1203 SMLoc AtLoc = getLexer().getLoc();
1204 StringRef VName;
1205 if (parseIdentifier(VName))
1206 return Error(AtLoc, "expected symbol variant after '@'");
1207
1208 Split = std::make_pair(Identifier, VName);
1209 }
1210 } else {
1211 Split = Identifier.split('@');
1212 }
1213 } else if (Lexer.is(AsmToken::LParen)) {
1214 Lex(); // eat '('.
1215 StringRef VName;
1216 parseIdentifier(VName);
1217 // eat ')'.
1218 if (parseToken(AsmToken::RParen,
1219 "unexpected token in variant, expected ')'"))
1220 return true;
1221 Split = std::make_pair(Identifier, VName);
1222 }
1223
1224 EndLoc = SMLoc::getFromPointer(Identifier.end());
1225
1226 // This is a symbol reference.
1227 StringRef SymbolName = Identifier;
1228 if (SymbolName.empty())
1229 return Error(getLexer().getLoc(), "expected a symbol reference");
1230
1231 MCSymbolRefExpr::VariantKind Variant = MCSymbolRefExpr::VK_None;
1232
1233 // Lookup the symbol variant if used.
1234 if (!Split.second.empty()) {
1235 Variant = MCSymbolRefExpr::getVariantKindForName(Split.second);
1236 if (Variant != MCSymbolRefExpr::VK_Invalid) {
1237 SymbolName = Split.first;
1238 } else if (MAI.doesAllowAtInName() && !MAI.useParensForSymbolVariant()) {
1239 Variant = MCSymbolRefExpr::VK_None;
1240 } else {
1241 return Error(SMLoc::getFromPointer(Split.second.begin()),
1242 "invalid variant '" + Split.second + "'");
1243 }
1244 }
1245
1246 MCSymbol *Sym = getContext().getInlineAsmLabel(SymbolName);
1247 if (!Sym)
1248 Sym = getContext().getOrCreateSymbol(
1249 MAI.shouldEmitLabelsInUpperCase() ? SymbolName.upper() : SymbolName);
1250
1251 // If this is an absolute variable reference, substitute it now to preserve
1252 // semantics in the face of reassignment.
1253 if (Sym->isVariable()) {
1254 auto V = Sym->getVariableValue(/*SetUsed*/ false);
1255 bool DoInline = isa<MCConstantExpr>(V) && !Variant;
1256 if (auto TV = dyn_cast<MCTargetExpr>(V))
1257 DoInline = TV->inlineAssignedExpr();
1258 if (DoInline) {
1259 if (Variant)
1260 return Error(EndLoc, "unexpected modifier on variable reference");
1261 Res = Sym->getVariableValue(/*SetUsed*/ false);
1262 return false;
1263 }
1264 }
1265
1266 // Otherwise create a symbol ref.
1267 Res = MCSymbolRefExpr::create(Sym, Variant, getContext(), FirstTokenLoc);
1268 return false;
1269 }
1270 case AsmToken::BigNum:
1271 return TokError("literal value out of range for directive");
1272 case AsmToken::Integer: {
1273 SMLoc Loc = getTok().getLoc();
1274 int64_t IntVal = getTok().getIntVal();
1275 Res = MCConstantExpr::create(IntVal, getContext());
1276 EndLoc = Lexer.getTok().getEndLoc();
1277 Lex(); // Eat token.
1278 // Look for 'b' or 'f' following an Integer as a directional label
1279 if (Lexer.getKind() == AsmToken::Identifier) {
1280 StringRef IDVal = getTok().getString();
1281 // Lookup the symbol variant if used.
1282 std::pair<StringRef, StringRef> Split = IDVal.split('@');
1283 MCSymbolRefExpr::VariantKind Variant = MCSymbolRefExpr::VK_None;
1284 if (Split.first.size() != IDVal.size()) {
1285 Variant = MCSymbolRefExpr::getVariantKindForName(Split.second);
1286 if (Variant == MCSymbolRefExpr::VK_Invalid)
1287 return TokError("invalid variant '" + Split.second + "'");
1288 IDVal = Split.first;
1289 }
1290 if (IDVal == "f" || IDVal == "b") {
1291 MCSymbol *Sym =
1292 Ctx.getDirectionalLocalSymbol(IntVal, IDVal == "b");
1293 Res = MCSymbolRefExpr::create(Sym, Variant, getContext());
1294 if (IDVal == "b" && Sym->isUndefined())
1295 return Error(Loc, "directional label undefined");
1296 DirLabels.push_back(std::make_tuple(Loc, CppHashInfo, Sym));
1297 EndLoc = Lexer.getTok().getEndLoc();
1298 Lex(); // Eat identifier.
1299 }
1300 }
1301 return false;
1302 }
1303 case AsmToken::Real: {
1304 APFloat RealVal(APFloat::IEEEdouble(), getTok().getString());
1305 uint64_t IntVal = RealVal.bitcastToAPInt().getZExtValue();
1306 Res = MCConstantExpr::create(IntVal, getContext());
1307 EndLoc = Lexer.getTok().getEndLoc();
1308 Lex(); // Eat token.
1309 return false;
1310 }
1311 case AsmToken::Dot: {
1312 if (!MAI.getDotIsPC())
1313 return TokError("cannot use . as current PC");
1314
1315 // This is a '.' reference, which references the current PC. Emit a
1316 // temporary label to the streamer and refer to it.
1317 MCSymbol *Sym = Ctx.createTempSymbol();
1318 Out.emitLabel(Sym);
1319 Res = MCSymbolRefExpr::create(Sym, MCSymbolRefExpr::VK_None, getContext());
1320 EndLoc = Lexer.getTok().getEndLoc();
1321 Lex(); // Eat identifier.
1322 return false;
1323 }
1324 case AsmToken::LParen:
1325 Lex(); // Eat the '('.
1326 return parseParenExpr(Res, EndLoc);
1327 case AsmToken::LBrac:
1328 if (!PlatformParser->HasBracketExpressions())
1329 return TokError("brackets expression not supported on this target");
1330 Lex(); // Eat the '['.
1331 return parseBracketExpr(Res, EndLoc);
1332 case AsmToken::Minus:
1333 Lex(); // Eat the operator.
1334 if (parsePrimaryExpr(Res, EndLoc, TypeInfo))
1335 return true;
1336 Res = MCUnaryExpr::createMinus(Res, getContext(), FirstTokenLoc);
1337 return false;
1338 case AsmToken::Plus:
1339 Lex(); // Eat the operator.
1340 if (parsePrimaryExpr(Res, EndLoc, TypeInfo))
1341 return true;
1342 Res = MCUnaryExpr::createPlus(Res, getContext(), FirstTokenLoc);
1343 return false;
1344 case AsmToken::Tilde:
1345 Lex(); // Eat the operator.
1346 if (parsePrimaryExpr(Res, EndLoc, TypeInfo))
1347 return true;
1348 Res = MCUnaryExpr::createNot(Res, getContext(), FirstTokenLoc);
1349 return false;
1350 // MIPS unary expression operators. The lexer won't generate these tokens if
1351 // MCAsmInfo::HasMipsExpressions is false for the target.
1352 case AsmToken::PercentCall16:
1353 case AsmToken::PercentCall_Hi:
1354 case AsmToken::PercentCall_Lo:
1355 case AsmToken::PercentDtprel_Hi:
1356 case AsmToken::PercentDtprel_Lo:
1357 case AsmToken::PercentGot:
1358 case AsmToken::PercentGot_Disp:
1359 case AsmToken::PercentGot_Hi:
1360 case AsmToken::PercentGot_Lo:
1361 case AsmToken::PercentGot_Ofst:
1362 case AsmToken::PercentGot_Page:
1363 case AsmToken::PercentGottprel:
1364 case AsmToken::PercentGp_Rel:
1365 case AsmToken::PercentHi:
1366 case AsmToken::PercentHigher:
1367 case AsmToken::PercentHighest:
1368 case AsmToken::PercentLo:
1369 case AsmToken::PercentNeg:
1370 case AsmToken::PercentPcrel_Hi:
1371 case AsmToken::PercentPcrel_Lo:
1372 case AsmToken::PercentTlsgd:
1373 case AsmToken::PercentTlsldm:
1374 case AsmToken::PercentTprel_Hi:
1375 case AsmToken::PercentTprel_Lo:
1376 Lex(); // Eat the operator.
1377 if (Lexer.isNot(AsmToken::LParen))
1378 return TokError("expected '(' after operator");
1379 Lex(); // Eat the operator.
1380 if (parseExpression(Res, EndLoc))
1381 return true;
1382 if (Lexer.isNot(AsmToken::RParen))
1383 return TokError("expected ')'");
1384 Lex(); // Eat the operator.
1385 Res = getTargetParser().createTargetUnaryExpr(Res, FirstTokenKind, Ctx);
1386 return !Res;
1387 }
1388}
1389
1390bool AsmParser::parseExpression(const MCExpr *&Res) {
1391 SMLoc EndLoc;
1392 return parseExpression(Res, EndLoc);
1393}
1394
1395const MCExpr *
1396AsmParser::applyModifierToExpr(const MCExpr *E,
1397 MCSymbolRefExpr::VariantKind Variant) {
1398 // Ask the target implementation about this expression first.
1399 const MCExpr *NewE = getTargetParser().applyModifierToExpr(E, Variant, Ctx);
1400 if (NewE)
1401 return NewE;
1402 // Recurse over the given expression, rebuilding it to apply the given variant
1403 // if there is exactly one symbol.
1404 switch (E->getKind()) {
1405 case MCExpr::Target:
1406 case MCExpr::Constant:
1407 return nullptr;
1408
1409 case MCExpr::SymbolRef: {
1410 const MCSymbolRefExpr *SRE = cast<MCSymbolRefExpr>(E);
1411
1412 if (SRE->getKind() != MCSymbolRefExpr::VK_None) {
1413 TokError("invalid variant on expression '" + getTok().getIdentifier() +
1414 "' (already modified)");
1415 return E;
1416 }
1417
1418 return MCSymbolRefExpr::create(&SRE->getSymbol(), Variant, getContext());
1419 }
1420
1421 case MCExpr::Unary: {
1422 const MCUnaryExpr *UE = cast<MCUnaryExpr>(E);
1423 const MCExpr *Sub = applyModifierToExpr(UE->getSubExpr(), Variant);
1424 if (!Sub)
1425 return nullptr;
1426 return MCUnaryExpr::create(UE->getOpcode(), Sub, getContext());
1427 }
1428
1429 case MCExpr::Binary: {
1430 const MCBinaryExpr *BE = cast<MCBinaryExpr>(E);
1431 const MCExpr *LHS = applyModifierToExpr(BE->getLHS(), Variant);
1432 const MCExpr *RHS = applyModifierToExpr(BE->getRHS(), Variant);
1433
1434 if (!LHS && !RHS)
1435 return nullptr;
1436
1437 if (!LHS)
1438 LHS = BE->getLHS();
1439 if (!RHS)
1440 RHS = BE->getRHS();
1441
1442 return MCBinaryExpr::create(BE->getOpcode(), LHS, RHS, getContext());
1443 }
1444 }
1445
1446 llvm_unreachable("Invalid expression kind!")::llvm::llvm_unreachable_internal("Invalid expression kind!",
"llvm/lib/MC/MCParser/AsmParser.cpp", 1446)
;
1447}
1448
1449/// This function checks if the next token is <string> type or arithmetic.
1450/// string that begin with character '<' must end with character '>'.
1451/// otherwise it is arithmetics.
1452/// If the function returns a 'true' value,
1453/// the End argument will be filled with the last location pointed to the '>'
1454/// character.
1455
1456/// There is a gap between the AltMacro's documentation and the single quote
1457/// implementation. GCC does not fully support this feature and so we will not
1458/// support it.
1459/// TODO: Adding single quote as a string.
1460static bool isAngleBracketString(SMLoc &StrLoc, SMLoc &EndLoc) {
1461 assert((StrLoc.getPointer() != nullptr) &&(static_cast <bool> ((StrLoc.getPointer() != nullptr) &&
"Argument to the function cannot be a NULL value") ? void (0
) : __assert_fail ("(StrLoc.getPointer() != nullptr) && \"Argument to the function cannot be a NULL value\""
, "llvm/lib/MC/MCParser/AsmParser.cpp", 1462, __extension__ __PRETTY_FUNCTION__
))
1462 "Argument to the function cannot be a NULL value")(static_cast <bool> ((StrLoc.getPointer() != nullptr) &&
"Argument to the function cannot be a NULL value") ? void (0
) : __assert_fail ("(StrLoc.getPointer() != nullptr) && \"Argument to the function cannot be a NULL value\""
, "llvm/lib/MC/MCParser/AsmParser.cpp", 1462, __extension__ __PRETTY_FUNCTION__
))
;
1463 const char *CharPtr = StrLoc.getPointer();
1464 while ((*CharPtr != '>') && (*CharPtr != '\n') && (*CharPtr != '\r') &&
1465 (*CharPtr != '\0')) {
1466 if (*CharPtr == '!')
1467 CharPtr++;
1468 CharPtr++;
1469 }
1470 if (*CharPtr == '>') {
1471 EndLoc = StrLoc.getFromPointer(CharPtr + 1);
1472 return true;
1473 }
1474 return false;
1475}
1476
1477/// creating a string without the escape characters '!'.
1478static std::string angleBracketString(StringRef AltMacroStr) {
1479 std::string Res;
1480 for (size_t Pos = 0; Pos < AltMacroStr.size(); Pos++) {
1481 if (AltMacroStr[Pos] == '!')
1482 Pos++;
1483 Res += AltMacroStr[Pos];
1484 }
1485 return Res;
1486}
1487
1488/// Parse an expression and return it.
1489///
1490/// expr ::= expr &&,|| expr -> lowest.
1491/// expr ::= expr |,^,&,! expr
1492/// expr ::= expr ==,!=,<>,<,<=,>,>= expr
1493/// expr ::= expr <<,>> expr
1494/// expr ::= expr +,- expr
1495/// expr ::= expr *,/,% expr -> highest.
1496/// expr ::= primaryexpr
1497///
1498bool AsmParser::parseExpression(const MCExpr *&Res, SMLoc &EndLoc) {
1499 // Parse the expression.
1500 Res = nullptr;
1501 if (getTargetParser().parsePrimaryExpr(Res, EndLoc) ||
1502 parseBinOpRHS(1, Res, EndLoc))
1503 return true;
1504
1505 // As a special case, we support 'a op b @ modifier' by rewriting the
1506 // expression to include the modifier. This is inefficient, but in general we
1507 // expect users to use 'a@modifier op b'.
1508 if (Lexer.getKind() == AsmToken::At) {
1509 Lex();
1510
1511 if (Lexer.isNot(AsmToken::Identifier))
1512 return TokError("unexpected symbol modifier following '@'");
1513
1514 MCSymbolRefExpr::VariantKind Variant =
1515 MCSymbolRefExpr::getVariantKindForName(getTok().getIdentifier());
1516 if (Variant == MCSymbolRefExpr::VK_Invalid)
1517 return TokError("invalid variant '" + getTok().getIdentifier() + "'");
1518
1519 const MCExpr *ModifiedRes = applyModifierToExpr(Res, Variant);
1520 if (!ModifiedRes) {
1521 return TokError("invalid modifier '" + getTok().getIdentifier() +
1522 "' (no symbols present)");
1523 }
1524
1525 Res = ModifiedRes;
1526 Lex();
1527 }
1528
1529 // Try to constant fold it up front, if possible. Do not exploit
1530 // assembler here.
1531 int64_t Value;
1532 if (Res->evaluateAsAbsolute(Value))
1533 Res = MCConstantExpr::create(Value, getContext());
1534
1535 return false;
1536}
1537
1538bool AsmParser::parseParenExpression(const MCExpr *&Res, SMLoc &EndLoc) {
1539 Res = nullptr;
1540 return parseParenExpr(Res, EndLoc) || parseBinOpRHS(1, Res, EndLoc);
1541}
1542
1543bool AsmParser::parseParenExprOfDepth(unsigned ParenDepth, const MCExpr *&Res,
1544 SMLoc &EndLoc) {
1545 if (parseParenExpr(Res, EndLoc))
1546 return true;
1547
1548 for (; ParenDepth > 0; --ParenDepth) {
1549 if (parseBinOpRHS(1, Res, EndLoc))
1550 return true;
1551
1552 // We don't Lex() the last RParen.
1553 // This is the same behavior as parseParenExpression().
1554 if (ParenDepth - 1 > 0) {
1555 EndLoc = getTok().getEndLoc();
1556 if (parseToken(AsmToken::RParen,
1557 "expected ')' in parentheses expression"))
1558 return true;
1559 }
1560 }
1561 return false;
1562}
1563
1564bool AsmParser::parseAbsoluteExpression(int64_t &Res) {
1565 const MCExpr *Expr;
1566
1567 SMLoc StartLoc = Lexer.getLoc();
1568 if (parseExpression(Expr))
1569 return true;
1570
1571 if (!Expr->evaluateAsAbsolute(Res, getStreamer().getAssemblerPtr()))
1572 return Error(StartLoc, "expected absolute expression");
1573
1574 return false;
1575}
1576
1577static unsigned getDarwinBinOpPrecedence(AsmToken::TokenKind K,
1578 MCBinaryExpr::Opcode &Kind,
1579 bool ShouldUseLogicalShr) {
1580 switch (K) {
1581 default:
1582 return 0; // not a binop.
1583
1584 // Lowest Precedence: &&, ||
1585 case AsmToken::AmpAmp:
1586 Kind = MCBinaryExpr::LAnd;
1587 return 1;
1588 case AsmToken::PipePipe:
1589 Kind = MCBinaryExpr::LOr;
1590 return 1;
1591
1592 // Low Precedence: |, &, ^
1593 case AsmToken::Pipe:
1594 Kind = MCBinaryExpr::Or;
1595 return 2;
1596 case AsmToken::Caret:
1597 Kind = MCBinaryExpr::Xor;
1598 return 2;
1599 case AsmToken::Amp:
1600 Kind = MCBinaryExpr::And;
1601 return 2;
1602
1603 // Low Intermediate Precedence: ==, !=, <>, <, <=, >, >=
1604 case AsmToken::EqualEqual:
1605 Kind = MCBinaryExpr::EQ;
1606 return 3;
1607 case AsmToken::ExclaimEqual:
1608 case AsmToken::LessGreater:
1609 Kind = MCBinaryExpr::NE;
1610 return 3;
1611 case AsmToken::Less:
1612 Kind = MCBinaryExpr::LT;
1613 return 3;
1614 case AsmToken::LessEqual:
1615 Kind = MCBinaryExpr::LTE;
1616 return 3;
1617 case AsmToken::Greater:
1618 Kind = MCBinaryExpr::GT;
1619 return 3;
1620 case AsmToken::GreaterEqual:
1621 Kind = MCBinaryExpr::GTE;
1622 return 3;
1623
1624 // Intermediate Precedence: <<, >>
1625 case AsmToken::LessLess:
1626 Kind = MCBinaryExpr::Shl;
1627 return 4;
1628 case AsmToken::GreaterGreater:
1629 Kind = ShouldUseLogicalShr ? MCBinaryExpr::LShr : MCBinaryExpr::AShr;
1630 return 4;
1631
1632 // High Intermediate Precedence: +, -
1633 case AsmToken::Plus:
1634 Kind = MCBinaryExpr::Add;
1635 return 5;
1636 case AsmToken::Minus:
1637 Kind = MCBinaryExpr::Sub;
1638 return 5;
1639
1640 // Highest Precedence: *, /, %
1641 case AsmToken::Star:
1642 Kind = MCBinaryExpr::Mul;
1643 return 6;
1644 case AsmToken::Slash:
1645 Kind = MCBinaryExpr::Div;
1646 return 6;
1647 case AsmToken::Percent:
1648 Kind = MCBinaryExpr::Mod;
1649 return 6;
1650 }
1651}
1652
1653static unsigned getGNUBinOpPrecedence(const MCAsmInfo &MAI,
1654 AsmToken::TokenKind K,
1655 MCBinaryExpr::Opcode &Kind,
1656 bool ShouldUseLogicalShr) {
1657 switch (K) {
1658 default:
1659 return 0; // not a binop.
1660
1661 // Lowest Precedence: &&, ||
1662 case AsmToken::AmpAmp:
1663 Kind = MCBinaryExpr::LAnd;
1664 return 2;
1665 case AsmToken::PipePipe:
1666 Kind = MCBinaryExpr::LOr;
1667 return 1;
1668
1669 // Low Precedence: ==, !=, <>, <, <=, >, >=
1670 case AsmToken::EqualEqual:
1671 Kind = MCBinaryExpr::EQ;
1672 return 3;
1673 case AsmToken::ExclaimEqual:
1674 case AsmToken::LessGreater:
1675 Kind = MCBinaryExpr::NE;
1676 return 3;
1677 case AsmToken::Less:
1678 Kind = MCBinaryExpr::LT;
1679 return 3;
1680 case AsmToken::LessEqual:
1681 Kind = MCBinaryExpr::LTE;
1682 return 3;
1683 case AsmToken::Greater:
1684 Kind = MCBinaryExpr::GT;
1685 return 3;
1686 case AsmToken::GreaterEqual:
1687 Kind = MCBinaryExpr::GTE;
1688 return 3;
1689
1690 // Low Intermediate Precedence: +, -
1691 case AsmToken::Plus:
1692 Kind = MCBinaryExpr::Add;
1693 return 4;
1694 case AsmToken::Minus:
1695 Kind = MCBinaryExpr::Sub;
1696 return 4;
1697
1698 // High Intermediate Precedence: |, !, &, ^
1699 //
1700 case AsmToken::Pipe:
1701 Kind = MCBinaryExpr::Or;
1702 return 5;
1703 case AsmToken::Exclaim:
1704 // Hack to support ARM compatible aliases (implied 'sp' operand in 'srs*'
1705 // instructions like 'srsda #31!') and not parse ! as an infix operator.
1706 if (MAI.getCommentString() == "@")
1707 return 0;
1708 Kind = MCBinaryExpr::OrNot;
1709 return 5;
1710 case AsmToken::Caret:
1711 Kind = MCBinaryExpr::Xor;
1712 return 5;
1713 case AsmToken::Amp:
1714 Kind = MCBinaryExpr::And;
1715 return 5;
1716
1717 // Highest Precedence: *, /, %, <<, >>
1718 case AsmToken::Star:
1719 Kind = MCBinaryExpr::Mul;
1720 return 6;
1721 case AsmToken::Slash:
1722 Kind = MCBinaryExpr::Div;
1723 return 6;
1724 case AsmToken::Percent:
1725 Kind = MCBinaryExpr::Mod;
1726 return 6;
1727 case AsmToken::LessLess:
1728 Kind = MCBinaryExpr::Shl;
1729 return 6;
1730 case AsmToken::GreaterGreater:
1731 Kind = ShouldUseLogicalShr ? MCBinaryExpr::LShr : MCBinaryExpr::AShr;
1732 return 6;
1733 }
1734}
1735
1736unsigned AsmParser::getBinOpPrecedence(AsmToken::TokenKind K,
1737 MCBinaryExpr::Opcode &Kind) {
1738 bool ShouldUseLogicalShr = MAI.shouldUseLogicalShr();
1739 return IsDarwin ? getDarwinBinOpPrecedence(K, Kind, ShouldUseLogicalShr)
1740 : getGNUBinOpPrecedence(MAI, K, Kind, ShouldUseLogicalShr);
1741}
1742
1743/// Parse all binary operators with precedence >= 'Precedence'.
1744/// Res contains the LHS of the expression on input.
1745bool AsmParser::parseBinOpRHS(unsigned Precedence, const MCExpr *&Res,
1746 SMLoc &EndLoc) {
1747 SMLoc StartLoc = Lexer.getLoc();
1748 while (true) {
1749 MCBinaryExpr::Opcode Kind = MCBinaryExpr::Add;
1750 unsigned TokPrec = getBinOpPrecedence(Lexer.getKind(), Kind);
1751
1752 // If the next token is lower precedence than we are allowed to eat, return
1753 // successfully with what we ate already.
1754 if (TokPrec < Precedence)
1755 return false;
1756
1757 Lex();
1758
1759 // Eat the next primary expression.
1760 const MCExpr *RHS;
1761 if (getTargetParser().parsePrimaryExpr(RHS, EndLoc))
1762 return true;
1763
1764 // If BinOp binds less tightly with RHS than the operator after RHS, let
1765 // the pending operator take RHS as its LHS.
1766 MCBinaryExpr::Opcode Dummy;
1767 unsigned NextTokPrec = getBinOpPrecedence(Lexer.getKind(), Dummy);
1768 if (TokPrec < NextTokPrec && parseBinOpRHS(TokPrec + 1, RHS, EndLoc))
1769 return true;
1770
1771 // Merge LHS and RHS according to operator.
1772 Res = MCBinaryExpr::create(Kind, Res, RHS, getContext(), StartLoc);
1773 }
1774}
1775
1776/// ParseStatement:
1777/// ::= EndOfStatement
1778/// ::= Label* Directive ...Operands... EndOfStatement
1779/// ::= Label* Identifier OperandList* EndOfStatement
1780bool AsmParser::parseStatement(ParseStatementInfo &Info,
1781 MCAsmParserSemaCallback *SI) {
1782 assert(!hasPendingError() && "parseStatement started with pending error")(static_cast <bool> (!hasPendingError() && "parseStatement started with pending error"
) ? void (0) : __assert_fail ("!hasPendingError() && \"parseStatement started with pending error\""
, "llvm/lib/MC/MCParser/AsmParser.cpp", 1782, __extension__ __PRETTY_FUNCTION__
))
;
1
'?' condition is true
1783 // Eat initial spaces and comments
1784 while (Lexer.is(AsmToken::Space))
2
Loop condition is false. Execution continues on line 1786
1785 Lex();
1786 if (Lexer.is(AsmToken::EndOfStatement)) {
3
Taking false branch
1787 // if this is a line comment we can drop it safely
1788 if (getTok().getString().empty() || getTok().getString().front() == '\r' ||
1789 getTok().getString().front() == '\n')
1790 Out.AddBlankLine();
1791 Lex();
1792 return false;
1793 }
1794 // Statements always start with an identifier.
1795 AsmToken ID = getTok();
1796 SMLoc IDLoc = ID.getLoc();
1797 StringRef IDVal;
1798 int64_t LocalLabelVal = -1;
1799 StartTokLoc = ID.getLoc();
1800 if (Lexer.is(AsmToken::HashDirective))
4
Taking false branch
1801 return parseCppHashLineFilenameComment(IDLoc,
1802 !isInsideMacroInstantiation());
1803
1804 // Allow an integer followed by a ':' as a directional local label.
1805 if (Lexer.is(AsmToken::Integer)) {
5
Taking false branch
1806 LocalLabelVal = getTok().getIntVal();
1807 if (LocalLabelVal < 0) {
1808 if (!TheCondState.Ignore) {
1809 Lex(); // always eat a token
1810 return Error(IDLoc, "unexpected token at start of statement");
1811 }
1812 IDVal = "";
1813 } else {
1814 IDVal = getTok().getString();
1815 Lex(); // Consume the integer token to be used as an identifier token.
1816 if (Lexer.getKind() != AsmToken::Colon) {
1817 if (!TheCondState.Ignore) {
1818 Lex(); // always eat a token
1819 return Error(IDLoc, "unexpected token at start of statement");
1820 }
1821 }
1822 }
1823 } else if (Lexer.is(AsmToken::Dot)) {
6
Taking false branch
1824 // Treat '.' as a valid identifier in this context.
1825 Lex();
1826 IDVal = ".";
1827 } else if (Lexer.is(AsmToken::LCurly)) {
7
Taking false branch
1828 // Treat '{' as a valid identifier in this context.
1829 Lex();
1830 IDVal = "{";
1831
1832 } else if (Lexer.is(AsmToken::RCurly)) {
1833 // Treat '}' as a valid identifier in this context.
1834 Lex();
1835 IDVal = "}";
1836 } else if (Lexer.is(AsmToken::Star) &&
1837 getTargetParser().starIsStartOfStatement()) {
1838 // Accept '*' as a valid start of statement.
1839 Lex();
1840 IDVal = "*";
1841 } else if (parseIdentifier(IDVal)) {
8
Assuming the condition is false
9
Taking false branch
1842 if (!TheCondState.Ignore) {
1843 Lex(); // always eat a token
1844 return Error(IDLoc, "unexpected token at start of statement");
1845 }
1846 IDVal = "";
1847 }
1848
1849 // Handle conditional assembly here before checking for skipping. We
1850 // have to do this so that .endif isn't skipped in a ".if 0" block for
1851 // example.
1852 StringMap<DirectiveKind>::const_iterator DirKindIt =
1853 DirectiveKindMap.find(IDVal.lower());
1854 DirectiveKind DirKind = (DirKindIt == DirectiveKindMap.end())
10
'?' condition is false
1855 ? DK_NO_DIRECTIVE
1856 : DirKindIt->getValue();
1857 switch (DirKind) {
11
Control jumps to the 'default' case at line 1858
1858 default:
1859 break;
1860 case DK_IF:
1861 case DK_IFEQ:
1862 case DK_IFGE:
1863 case DK_IFGT:
1864 case DK_IFLE:
1865 case DK_IFLT:
1866 case DK_IFNE:
1867 return parseDirectiveIf(IDLoc, DirKind);
1868 case DK_IFB:
1869 return parseDirectiveIfb(IDLoc, true);
1870 case DK_IFNB:
1871 return parseDirectiveIfb(IDLoc, false);
1872 case DK_IFC:
1873 return parseDirectiveIfc(IDLoc, true);
1874 case DK_IFEQS:
1875 return parseDirectiveIfeqs(IDLoc, true);
1876 case DK_IFNC:
1877 return parseDirectiveIfc(IDLoc, false);
1878 case DK_IFNES:
1879 return parseDirectiveIfeqs(IDLoc, false);
1880 case DK_IFDEF:
1881 return parseDirectiveIfdef(IDLoc, true);
1882 case DK_IFNDEF:
1883 case DK_IFNOTDEF:
1884 return parseDirectiveIfdef(IDLoc, false);
1885 case DK_ELSEIF:
1886 return parseDirectiveElseIf(IDLoc);
1887 case DK_ELSE:
1888 return parseDirectiveElse(IDLoc);
1889 case DK_ENDIF:
1890 return parseDirectiveEndIf(IDLoc);
1891 }
1892
1893 // Ignore the statement if in the middle of inactive conditional
1894 // (e.g. ".if 0").
1895 if (TheCondState.Ignore) {
12
Execution continues on line 1895
13
Assuming field 'Ignore' is false
14
Taking false branch
1896 eatToEndOfStatement();
1897 return false;
1898 }
1899
1900 // FIXME: Recurse on local labels?
1901
1902 // See what kind of statement we have.
1903 switch (Lexer.getKind()) {
15
Control jumps to the 'default' case at line 1980
1904 case AsmToken::Colon: {
1905 if (!getTargetParser().isLabel(ID))
1906 break;
1907 if (checkForValidSection())
1908 return true;
1909
1910 // identifier ':' -> Label.
1911 Lex();
1912
1913 // Diagnose attempt to use '.' as a label.
1914 if (IDVal == ".")
1915 return Error(IDLoc, "invalid use of pseudo-symbol '.' as a label");
1916
1917 // Diagnose attempt to use a variable as a label.
1918 //
1919 // FIXME: Diagnostics. Note the location of the definition as a label.
1920 // FIXME: This doesn't diagnose assignment to a symbol which has been
1921 // implicitly marked as external.
1922 MCSymbol *Sym;
1923 if (LocalLabelVal == -1) {
1924 if (ParsingMSInlineAsm && SI) {
1925 StringRef RewrittenLabel =
1926 SI->LookupInlineAsmLabel(IDVal, getSourceManager(), IDLoc, true);
1927 assert(!RewrittenLabel.empty() &&(static_cast <bool> (!RewrittenLabel.empty() &&
"We should have an internal name here.") ? void (0) : __assert_fail
("!RewrittenLabel.empty() && \"We should have an internal name here.\""
, "llvm/lib/MC/MCParser/AsmParser.cpp", 1928, __extension__ __PRETTY_FUNCTION__
))
1928 "We should have an internal name here.")(static_cast <bool> (!RewrittenLabel.empty() &&
"We should have an internal name here.") ? void (0) : __assert_fail
("!RewrittenLabel.empty() && \"We should have an internal name here.\""
, "llvm/lib/MC/MCParser/AsmParser.cpp", 1928, __extension__ __PRETTY_FUNCTION__
))
;
1929 Info.AsmRewrites->emplace_back(AOK_Label, IDLoc, IDVal.size(),
1930 RewrittenLabel);
1931 IDVal = RewrittenLabel;
1932 }
1933 Sym = getContext().getOrCreateSymbol(IDVal);
1934 } else
1935 Sym = Ctx.createDirectionalLocalSymbol(LocalLabelVal);
1936 // End of Labels should be treated as end of line for lexing
1937 // purposes but that information is not available to the Lexer who
1938 // does not understand Labels. This may cause us to see a Hash
1939 // here instead of a preprocessor line comment.
1940 if (getTok().is(AsmToken::Hash)) {
1941 StringRef CommentStr = parseStringToEndOfStatement();
1942 Lexer.Lex();
1943 Lexer.UnLex(AsmToken(AsmToken::EndOfStatement, CommentStr));
1944 }
1945
1946 // Consume any end of statement token, if present, to avoid spurious
1947 // AddBlankLine calls().
1948 if (getTok().is(AsmToken::EndOfStatement)) {
1949 Lex();
1950 }
1951
1952 if (discardLTOSymbol(IDVal))
1953 return false;
1954
1955 getTargetParser().doBeforeLabelEmit(Sym);
1956
1957 // Emit the label.
1958 if (!getTargetParser().isParsingMSInlineAsm())
1959 Out.emitLabel(Sym, IDLoc);
1960
1961 // If we are generating dwarf for assembly source files then gather the
1962 // info to make a dwarf label entry for this label if needed.
1963 if (enabledGenDwarfForAssembly())
1964 MCGenDwarfLabelEntry::Make(Sym, &getStreamer(), getSourceManager(),
1965 IDLoc);
1966
1967 getTargetParser().onLabelParsed(Sym);
1968
1969 return false;
1970 }
1971
1972 case AsmToken::Equal:
1973 if (!getTargetParser().equalIsAsmAssignment())
1974 break;
1975 // identifier '=' ... -> assignment statement
1976 Lex();
1977
1978 return parseAssignment(IDVal, AssignmentKind::Equal);
1979
1980 default: // Normal instruction or directive.
1981 break;
1982 }
1983
1984 // If macros are enabled, check to see if this is a macro instantiation.
1985 if (areMacrosEnabled())
16
Execution continues on line 1985
17
Assuming the condition is false
1986 if (const MCAsmMacro *M = getContext().lookupMacro(IDVal)) {
1987 return handleMacroEntry(M, IDLoc);
1988 }
1989
1990 // Otherwise, we have a normal instruction or directive.
1991
1992 // Directives start with "."
1993 if (IDVal.startswith(".") && IDVal != ".") {
18
Assuming the condition is true
19
Taking true branch
1994 // There are several entities interested in parsing directives:
1995 //
1996 // 1. The target-specific assembly parser. Some directives are target
1997 // specific or may potentially behave differently on certain targets.
1998 // 2. Asm parser extensions. For example, platform-specific parsers
1999 // (like the ELF parser) register themselves as extensions.
2000 // 3. The generic directive parser implemented by this class. These are
2001 // all the directives that behave in a target and platform independent
2002 // manner, or at least have a default behavior that's shared between
2003 // all targets and platforms.
2004
2005 getTargetParser().flushPendingInstructions(getStreamer());
2006
2007 SMLoc StartTokLoc = getTok().getLoc();
2008 bool TPDirectiveReturn = getTargetParser().ParseDirective(ID);
2009
2010 if (hasPendingError())
2011 return true;
2012 // Currently the return value should be true if we are
2013 // uninterested but as this is at odds with the standard parsing
2014 // convention (return true = error) we have instances of a parsed
2015 // directive that fails returning true as an error. Catch these
2016 // cases as best as possible errors here.
2017 if (TPDirectiveReturn && StartTokLoc != getTok().getLoc())
20
Assuming 'TPDirectiveReturn' is true
2018 return true;
2019 // Return if we did some parsing or believe we succeeded.
2020 if (!TPDirectiveReturn
20.1
'TPDirectiveReturn' is true
20.1
'TPDirectiveReturn' is true
20.1
'TPDirectiveReturn' is true
|| StartTokLoc != getTok().getLoc())
21
Taking false branch
2021 return false;
2022
2023 // Next, check the extension directive map to see if any extension has
2024 // registered itself to parse this directive.
2025 std::pair<MCAsmParserExtension *, DirectiveHandler> Handler =
2026 ExtensionDirectiveMap.lookup(IDVal);
2027 if (Handler.first)
22
Assuming field 'first' is null
23
Taking false branch
2028 return (*Handler.second)(Handler.first, IDVal, IDLoc);
2029
2030 // Finally, if no one else is interested in this directive, it must be
2031 // generic and familiar to this class.
2032 switch (DirKind) {
24
Control jumps to 'case DK_PSEUDO_PROBE:' at line 2297
2033 default:
2034 break;
2035 case DK_SET:
2036 case DK_EQU:
2037 return parseDirectiveSet(IDVal, AssignmentKind::Set);
2038 case DK_EQUIV:
2039 return parseDirectiveSet(IDVal, AssignmentKind::Equiv);
2040 case DK_LTO_SET_CONDITIONAL:
2041 return parseDirectiveSet(IDVal, AssignmentKind::LTOSetConditional);
2042 case DK_ASCII:
2043 return parseDirectiveAscii(IDVal, false);
2044 case DK_ASCIZ:
2045 case DK_STRING:
2046 return parseDirectiveAscii(IDVal, true);
2047 case DK_BYTE:
2048 case DK_DC_B:
2049 return parseDirectiveValue(IDVal, 1);
2050 case DK_DC:
2051 case DK_DC_W:
2052 case DK_SHORT:
2053 case DK_VALUE:
2054 case DK_2BYTE:
2055 return parseDirectiveValue(IDVal, 2);
2056 case DK_LONG:
2057 case DK_INT:
2058 case DK_4BYTE:
2059 case DK_DC_L:
2060 return parseDirectiveValue(IDVal, 4);
2061 case DK_QUAD:
2062 case DK_8BYTE:
2063 return parseDirectiveValue(IDVal, 8);
2064 case DK_DC_A:
2065 return parseDirectiveValue(
2066 IDVal, getContext().getAsmInfo()->getCodePointerSize());
2067 case DK_OCTA:
2068 return parseDirectiveOctaValue(IDVal);
2069 case DK_SINGLE:
2070 case DK_FLOAT:
2071 case DK_DC_S:
2072 return parseDirectiveRealValue(IDVal, APFloat::IEEEsingle());
2073 case DK_DOUBLE:
2074 case DK_DC_D:
2075 return parseDirectiveRealValue(IDVal, APFloat::IEEEdouble());
2076 case DK_ALIGN: {
2077 bool IsPow2 = !getContext().getAsmInfo()->getAlignmentIsInBytes();
2078 return parseDirectiveAlign(IsPow2, /*ExprSize=*/1);
2079 }
2080 case DK_ALIGN32: {
2081 bool IsPow2 = !getContext().getAsmInfo()->getAlignmentIsInBytes();
2082 return parseDirectiveAlign(IsPow2, /*ExprSize=*/4);
2083 }
2084 case DK_BALIGN:
2085 return parseDirectiveAlign(/*IsPow2=*/false, /*ExprSize=*/1);
2086 case DK_BALIGNW:
2087 return parseDirectiveAlign(/*IsPow2=*/false, /*ExprSize=*/2);
2088 case DK_BALIGNL:
2089 return parseDirectiveAlign(/*IsPow2=*/false, /*ExprSize=*/4);
2090 case DK_P2ALIGN:
2091 return parseDirectiveAlign(/*IsPow2=*/true, /*ExprSize=*/1);
2092 case DK_P2ALIGNW:
2093 return parseDirectiveAlign(/*IsPow2=*/true, /*ExprSize=*/2);
2094 case DK_P2ALIGNL:
2095 return parseDirectiveAlign(/*IsPow2=*/true, /*ExprSize=*/4);
2096 case DK_ORG:
2097 return parseDirectiveOrg();
2098 case DK_FILL:
2099 return parseDirectiveFill();
2100 case DK_ZERO:
2101 return parseDirectiveZero();
2102 case DK_EXTERN:
2103 eatToEndOfStatement(); // .extern is the default, ignore it.
2104 return false;
2105 case DK_GLOBL:
2106 case DK_GLOBAL:
2107 return parseDirectiveSymbolAttribute(MCSA_Global);
2108 case DK_LAZY_REFERENCE:
2109 return parseDirectiveSymbolAttribute(MCSA_LazyReference);
2110 case DK_NO_DEAD_STRIP:
2111 return parseDirectiveSymbolAttribute(MCSA_NoDeadStrip);
2112 case DK_SYMBOL_RESOLVER:
2113 return parseDirectiveSymbolAttribute(MCSA_SymbolResolver);
2114 case DK_PRIVATE_EXTERN:
2115 return parseDirectiveSymbolAttribute(MCSA_PrivateExtern);
2116 case DK_REFERENCE:
2117 return parseDirectiveSymbolAttribute(MCSA_Reference);
2118 case DK_WEAK_DEFINITION:
2119 return parseDirectiveSymbolAttribute(MCSA_WeakDefinition);
2120 case DK_WEAK_REFERENCE:
2121 return parseDirectiveSymbolAttribute(MCSA_WeakReference);
2122 case DK_WEAK_DEF_CAN_BE_HIDDEN:
2123 return parseDirectiveSymbolAttribute(MCSA_WeakDefAutoPrivate);
2124 case DK_COLD:
2125 return parseDirectiveSymbolAttribute(MCSA_Cold);
2126 case DK_COMM:
2127 case DK_COMMON:
2128 return parseDirectiveComm(/*IsLocal=*/false);
2129 case DK_LCOMM:
2130 return parseDirectiveComm(/*IsLocal=*/true);
2131 case DK_ABORT:
2132 return parseDirectiveAbort();
2133 case DK_INCLUDE:
2134 return parseDirectiveInclude();
2135 case DK_INCBIN:
2136 return parseDirectiveIncbin();
2137 case DK_CODE16:
2138 case DK_CODE16GCC:
2139 return TokError(Twine(IDVal) +
2140 " not currently supported for this target");
2141 case DK_REPT:
2142 return parseDirectiveRept(IDLoc, IDVal);
2143 case DK_IRP:
2144 return parseDirectiveIrp(IDLoc);
2145 case DK_IRPC:
2146 return parseDirectiveIrpc(IDLoc);
2147 case DK_ENDR:
2148 return parseDirectiveEndr(IDLoc);
2149 case DK_BUNDLE_ALIGN_MODE:
2150 return parseDirectiveBundleAlignMode();
2151 case DK_BUNDLE_LOCK:
2152 return parseDirectiveBundleLock();
2153 case DK_BUNDLE_UNLOCK:
2154 return parseDirectiveBundleUnlock();
2155 case DK_SLEB128:
2156 return parseDirectiveLEB128(true);
2157 case DK_ULEB128:
2158 return parseDirectiveLEB128(false);
2159 case DK_SPACE:
2160 case DK_SKIP:
2161 return parseDirectiveSpace(IDVal);
2162 case DK_FILE:
2163 return parseDirectiveFile(IDLoc);
2164 case DK_LINE:
2165 return parseDirectiveLine();
2166 case DK_LOC:
2167 return parseDirectiveLoc();
2168 case DK_STABS:
2169 return parseDirectiveStabs();
2170 case DK_CV_FILE:
2171 return parseDirectiveCVFile();
2172 case DK_CV_FUNC_ID:
2173 return parseDirectiveCVFuncId();
2174 case DK_CV_INLINE_SITE_ID:
2175 return parseDirectiveCVInlineSiteId();
2176 case DK_CV_LOC:
2177 return parseDirectiveCVLoc();
2178 case DK_CV_LINETABLE:
2179 return parseDirectiveCVLinetable();
2180 case DK_CV_INLINE_LINETABLE:
2181 return parseDirectiveCVInlineLinetable();
2182 case DK_CV_DEF_RANGE:
2183 return parseDirectiveCVDefRange();
2184 case DK_CV_STRING:
2185 return parseDirectiveCVString();
2186 case DK_CV_STRINGTABLE:
2187 return parseDirectiveCVStringTable();
2188 case DK_CV_FILECHECKSUMS:
2189 return parseDirectiveCVFileChecksums();
2190 case DK_CV_FILECHECKSUM_OFFSET:
2191 return parseDirectiveCVFileChecksumOffset();
2192 case DK_CV_FPO_DATA:
2193 return parseDirectiveCVFPOData();
2194 case DK_CFI_SECTIONS:
2195 return parseDirectiveCFISections();
2196 case DK_CFI_STARTPROC:
2197 return parseDirectiveCFIStartProc();
2198 case DK_CFI_ENDPROC:
2199 return parseDirectiveCFIEndProc();
2200 case DK_CFI_DEF_CFA:
2201 return parseDirectiveCFIDefCfa(IDLoc);
2202 case DK_CFI_DEF_CFA_OFFSET:
2203 return parseDirectiveCFIDefCfaOffset();
2204 case DK_CFI_ADJUST_CFA_OFFSET:
2205 return parseDirectiveCFIAdjustCfaOffset();
2206 case DK_CFI_DEF_CFA_REGISTER:
2207 return parseDirectiveCFIDefCfaRegister(IDLoc);
2208 case DK_CFI_LLVM_DEF_ASPACE_CFA:
2209 return parseDirectiveCFILLVMDefAspaceCfa(IDLoc);
2210 case DK_CFI_OFFSET:
2211 return parseDirectiveCFIOffset(IDLoc);
2212 case DK_CFI_REL_OFFSET:
2213 return parseDirectiveCFIRelOffset(IDLoc);
2214 case DK_CFI_PERSONALITY:
2215 return parseDirectiveCFIPersonalityOrLsda(true);
2216 case DK_CFI_LSDA:
2217 return parseDirectiveCFIPersonalityOrLsda(false);
2218 case DK_CFI_REMEMBER_STATE:
2219 return parseDirectiveCFIRememberState();
2220 case DK_CFI_RESTORE_STATE:
2221 return parseDirectiveCFIRestoreState();
2222 case DK_CFI_SAME_VALUE:
2223 return parseDirectiveCFISameValue(IDLoc);
2224 case DK_CFI_RESTORE:
2225 return parseDirectiveCFIRestore(IDLoc);
2226 case DK_CFI_ESCAPE:
2227 return parseDirectiveCFIEscape();
2228 case DK_CFI_RETURN_COLUMN:
2229 return parseDirectiveCFIReturnColumn(IDLoc);
2230 case DK_CFI_SIGNAL_FRAME:
2231 return parseDirectiveCFISignalFrame();
2232 case DK_CFI_UNDEFINED:
2233 return parseDirectiveCFIUndefined(IDLoc);
2234 case DK_CFI_REGISTER:
2235 return parseDirectiveCFIRegister(IDLoc);
2236 case DK_CFI_WINDOW_SAVE:
2237 return parseDirectiveCFIWindowSave();
2238 case DK_MACROS_ON:
2239 case DK_MACROS_OFF:
2240 return parseDirectiveMacrosOnOff(IDVal);
2241 case DK_MACRO:
2242 return parseDirectiveMacro(IDLoc);
2243 case DK_ALTMACRO:
2244 case DK_NOALTMACRO:
2245 return parseDirectiveAltmacro(IDVal);
2246 case DK_EXITM:
2247 return parseDirectiveExitMacro(IDVal);
2248 case DK_ENDM:
2249 case DK_ENDMACRO:
2250 return parseDirectiveEndMacro(IDVal);
2251 case DK_PURGEM:
2252 return parseDirectivePurgeMacro(IDLoc);
2253 case DK_END:
2254 return parseDirectiveEnd(IDLoc);
2255 case DK_ERR:
2256 return parseDirectiveError(IDLoc, false);
2257 case DK_ERROR:
2258 return parseDirectiveError(IDLoc, true);
2259 case DK_WARNING:
2260 return parseDirectiveWarning(IDLoc);
2261 case DK_RELOC:
2262 return parseDirectiveReloc(IDLoc);
2263 case DK_DCB:
2264 case DK_DCB_W:
2265 return parseDirectiveDCB(IDVal, 2);
2266 case DK_DCB_B:
2267 return parseDirectiveDCB(IDVal, 1);
2268 case DK_DCB_D:
2269 return parseDirectiveRealDCB(IDVal, APFloat::IEEEdouble());
2270 case DK_DCB_L:
2271 return parseDirectiveDCB(IDVal, 4);
2272 case DK_DCB_S:
2273 return parseDirectiveRealDCB(IDVal, APFloat::IEEEsingle());
2274 case DK_DC_X:
2275 case DK_DCB_X:
2276 return TokError(Twine(IDVal) +
2277 " not currently supported for this target");
2278 case DK_DS:
2279 case DK_DS_W:
2280 return parseDirectiveDS(IDVal, 2);
2281 case DK_DS_B:
2282 return parseDirectiveDS(IDVal, 1);
2283 case DK_DS_D:
2284 return parseDirectiveDS(IDVal, 8);
2285 case DK_DS_L:
2286 case DK_DS_S:
2287 return parseDirectiveDS(IDVal, 4);
2288 case DK_DS_P:
2289 case DK_DS_X:
2290 return parseDirectiveDS(IDVal, 12);
2291 case DK_PRINT:
2292 return parseDirectivePrint(IDLoc);
2293 case DK_ADDRSIG:
2294 return parseDirectiveAddrsig();
2295 case DK_ADDRSIG_SYM:
2296 return parseDirectiveAddrsigSym();
2297 case DK_PSEUDO_PROBE:
2298 return parseDirectivePseudoProbe();
25
Calling 'AsmParser::parseDirectivePseudoProbe'
2299 case DK_LTO_DISCARD:
2300 return parseDirectiveLTODiscard();
2301 }
2302
2303 return Error(IDLoc, "unknown directive");
2304 }
2305
2306 // __asm _emit or __asm __emit
2307 if (ParsingMSInlineAsm && (IDVal == "_emit" || IDVal == "__emit" ||
2308 IDVal == "_EMIT" || IDVal == "__EMIT"))
2309 return parseDirectiveMSEmit(IDLoc, Info, IDVal.size());
2310
2311 // __asm align
2312 if (ParsingMSInlineAsm && (IDVal == "align" || IDVal == "ALIGN"))
2313 return parseDirectiveMSAlign(IDLoc, Info);
2314
2315 if (ParsingMSInlineAsm && (IDVal == "even" || IDVal == "EVEN"))
2316 Info.AsmRewrites->emplace_back(AOK_EVEN, IDLoc, 4);
2317 if (checkForValidSection())
2318 return true;
2319
2320 return parseAndMatchAndEmitTargetInstruction(Info, IDVal, ID, IDLoc);
2321}
2322
2323bool AsmParser::parseAndMatchAndEmitTargetInstruction(ParseStatementInfo &Info,
2324 StringRef IDVal,
2325 AsmToken ID,
2326 SMLoc IDLoc) {
2327 // Canonicalize the opcode to lower case.
2328 std::string OpcodeStr = IDVal.lower();
2329 ParseInstructionInfo IInfo(Info.AsmRewrites);
2330 bool ParseHadError = getTargetParser().ParseInstruction(IInfo, OpcodeStr, ID,
2331 Info.ParsedOperands);
2332 Info.ParseError = ParseHadError;
2333
2334 // Dump the parsed representation, if requested.
2335 if (getShowParsedOperands()) {
2336 SmallString<256> Str;
2337 raw_svector_ostream OS(Str);
2338 OS << "parsed instruction: [";
2339 for (unsigned i = 0; i != Info.ParsedOperands.size(); ++i) {
2340 if (i != 0)
2341 OS << ", ";
2342 Info.ParsedOperands[i]->print(OS);
2343 }
2344 OS << "]";
2345
2346 printMessage(IDLoc, SourceMgr::DK_Note, OS.str());
2347 }
2348
2349 // Fail even if ParseInstruction erroneously returns false.
2350 if (hasPendingError() || ParseHadError)
2351 return true;
2352
2353 // If we are generating dwarf for the current section then generate a .loc
2354 // directive for the instruction.
2355 if (!ParseHadError && enabledGenDwarfForAssembly() &&
2356 getContext().getGenDwarfSectionSyms().count(
2357 getStreamer().getCurrentSectionOnly())) {
2358 unsigned Line;
2359 if (ActiveMacros.empty())
2360 Line = SrcMgr.FindLineNumber(IDLoc, CurBuffer);
2361 else
2362 Line = SrcMgr.FindLineNumber(ActiveMacros.front()->InstantiationLoc,
2363 ActiveMacros.front()->ExitBuffer);
2364
2365 // If we previously parsed a cpp hash file line comment then make sure the
2366 // current Dwarf File is for the CppHashFilename if not then emit the
2367 // Dwarf File table for it and adjust the line number for the .loc.
2368 if (!CppHashInfo.Filename.empty()) {
2369 unsigned FileNumber = getStreamer().emitDwarfFileDirective(
2370 0, StringRef(), CppHashInfo.Filename);
2371 getContext().setGenDwarfFileNumber(FileNumber);
2372
2373 unsigned CppHashLocLineNo =
2374 SrcMgr.FindLineNumber(CppHashInfo.Loc, CppHashInfo.Buf);
2375 Line = CppHashInfo.LineNumber - 1 + (Line - CppHashLocLineNo);
2376 }
2377
2378 getStreamer().emitDwarfLocDirective(
2379 getContext().getGenDwarfFileNumber(), Line, 0,
2380 DWARF2_LINE_DEFAULT_IS_STMT1 ? DWARF2_FLAG_IS_STMT(1 << 0) : 0, 0, 0,
2381 StringRef());
2382 }
2383
2384 // If parsing succeeded, match the instruction.
2385 if (!ParseHadError) {
2386 uint64_t ErrorInfo;
2387 if (getTargetParser().MatchAndEmitInstruction(
2388 IDLoc, Info.Opcode, Info.ParsedOperands, Out, ErrorInfo,
2389 getTargetParser().isParsingMSInlineAsm()))
2390 return true;
2391 }
2392 return false;
2393}
2394
2395// Parse and erase curly braces marking block start/end
2396bool
2397AsmParser::parseCurlyBlockScope(SmallVectorImpl<AsmRewrite> &AsmStrRewrites) {
2398 // Identify curly brace marking block start/end
2399 if (Lexer.isNot(AsmToken::LCurly) && Lexer.isNot(AsmToken::RCurly))
2400 return false;
2401
2402 SMLoc StartLoc = Lexer.getLoc();
2403 Lex(); // Eat the brace
2404 if (Lexer.is(AsmToken::EndOfStatement))
2405 Lex(); // Eat EndOfStatement following the brace
2406
2407 // Erase the block start/end brace from the output asm string
2408 AsmStrRewrites.emplace_back(AOK_Skip, StartLoc, Lexer.getLoc().getPointer() -
2409 StartLoc.getPointer());
2410 return true;
2411}
2412
2413/// parseCppHashLineFilenameComment as this:
2414/// ::= # number "filename"
2415bool AsmParser::parseCppHashLineFilenameComment(SMLoc L, bool SaveLocInfo) {
2416 Lex(); // Eat the hash token.
2417 // Lexer only ever emits HashDirective if it fully formed if it's
2418 // done the checking already so this is an internal error.
2419 assert(getTok().is(AsmToken::Integer) &&(static_cast <bool> (getTok().is(AsmToken::Integer) &&
"Lexing Cpp line comment: Expected Integer") ? void (0) : __assert_fail
("getTok().is(AsmToken::Integer) && \"Lexing Cpp line comment: Expected Integer\""
, "llvm/lib/MC/MCParser/AsmParser.cpp", 2420, __extension__ __PRETTY_FUNCTION__
))
2420 "Lexing Cpp line comment: Expected Integer")(static_cast <bool> (getTok().is(AsmToken::Integer) &&
"Lexing Cpp line comment: Expected Integer") ? void (0) : __assert_fail
("getTok().is(AsmToken::Integer) && \"Lexing Cpp line comment: Expected Integer\""
, "llvm/lib/MC/MCParser/AsmParser.cpp", 2420, __extension__ __PRETTY_FUNCTION__
))
;
2421 int64_t LineNumber = getTok().getIntVal();
2422 Lex();
2423 assert(getTok().is(AsmToken::String) &&(static_cast <bool> (getTok().is(AsmToken::String) &&
"Lexing Cpp line comment: Expected String") ? void (0) : __assert_fail
("getTok().is(AsmToken::String) && \"Lexing Cpp line comment: Expected String\""
, "llvm/lib/MC/MCParser/AsmParser.cpp", 2424, __extension__ __PRETTY_FUNCTION__
))
2424 "Lexing Cpp line comment: Expected String")(static_cast <bool> (getTok().is(AsmToken::String) &&
"Lexing Cpp line comment: Expected String") ? void (0) : __assert_fail
("getTok().is(AsmToken::String) && \"Lexing Cpp line comment: Expected String\""
, "llvm/lib/MC/MCParser/AsmParser.cpp", 2424, __extension__ __PRETTY_FUNCTION__
))
;
2425 StringRef Filename = getTok().getString();
2426 Lex();
2427
2428 if (!SaveLocInfo)
2429 return false;
2430
2431 // Get rid of the enclosing quotes.
2432 Filename = Filename.substr(1, Filename.size() - 2);
2433
2434 // Save the SMLoc, Filename and LineNumber for later use by diagnostics
2435 // and possibly DWARF file info.
2436 CppHashInfo.Loc = L;
2437 CppHashInfo.Filename = Filename;
2438 CppHashInfo.LineNumber = LineNumber;
2439 CppHashInfo.Buf = CurBuffer;
2440 if (FirstCppHashFilename.empty())
2441 FirstCppHashFilename = Filename;
2442 return false;
2443}
2444
2445/// will use the last parsed cpp hash line filename comment
2446/// for the Filename and LineNo if any in the diagnostic.
2447void AsmParser::DiagHandler(const SMDiagnostic &Diag, void *Context) {
2448 auto *Parser = static_cast<AsmParser *>(Context);
2449 raw_ostream &OS = errs();
2450
2451 const SourceMgr &DiagSrcMgr = *Diag.getSourceMgr();
2452 SMLoc DiagLoc = Diag.getLoc();
2453 unsigned DiagBuf = DiagSrcMgr.FindBufferContainingLoc(DiagLoc);
2454 unsigned CppHashBuf =
2455 Parser->SrcMgr.FindBufferContainingLoc(Parser->CppHashInfo.Loc);
2456
2457 // Like SourceMgr::printMessage() we need to print the include stack if any
2458 // before printing the message.
2459 unsigned DiagCurBuffer = DiagSrcMgr.FindBufferContainingLoc(DiagLoc);
2460 if (!Parser->SavedDiagHandler && DiagCurBuffer &&
2461 DiagCurBuffer != DiagSrcMgr.getMainFileID()) {
2462 SMLoc ParentIncludeLoc = DiagSrcMgr.getParentIncludeLoc(DiagCurBuffer);
2463 DiagSrcMgr.PrintIncludeStack(ParentIncludeLoc, OS);
2464 }
2465
2466 // If we have not parsed a cpp hash line filename comment or the source
2467 // manager changed or buffer changed (like in a nested include) then just
2468 // print the normal diagnostic using its Filename and LineNo.
2469 if (!Parser->CppHashInfo.LineNumber || DiagBuf != CppHashBuf) {
2470 if (Parser->SavedDiagHandler)
2471 Parser->SavedDiagHandler(Diag, Parser->SavedDiagContext);
2472 else
2473 Parser->getContext().diagnose(Diag);
2474 return;
2475 }
2476
2477 // Use the CppHashFilename and calculate a line number based on the
2478 // CppHashInfo.Loc and CppHashInfo.LineNumber relative to this Diag's SMLoc
2479 // for the diagnostic.
2480 const std::string &Filename = std::string(Parser->CppHashInfo.Filename);
2481
2482 int DiagLocLineNo = DiagSrcMgr.FindLineNumber(DiagLoc, DiagBuf);
2483 int CppHashLocLineNo =
2484 Parser->SrcMgr.FindLineNumber(Parser->CppHashInfo.Loc, CppHashBuf);
2485 int LineNo =
2486 Parser->CppHashInfo.LineNumber - 1 + (DiagLocLineNo - CppHashLocLineNo);
2487
2488 SMDiagnostic NewDiag(*Diag.getSourceMgr(), Diag.getLoc(), Filename, LineNo,
2489 Diag.getColumnNo(), Diag.getKind(), Diag.getMessage(),
2490 Diag.getLineContents(), Diag.getRanges());
2491
2492 if (Parser->SavedDiagHandler)
2493 Parser->SavedDiagHandler(Diag, Parser->SavedDiagContext);
2494 else
2495 Parser->getContext().diagnose(NewDiag);
2496}
2497
2498// FIXME: This is mostly duplicated from the function in AsmLexer.cpp. The
2499// difference being that that function accepts '@' as part of identifiers and
2500// we can't do that. AsmLexer.cpp should probably be changed to handle
2501// '@' as a special case when needed.
2502static bool isIdentifierChar(char c) {
2503 return isalnum(static_cast<unsigned char>(c)) || c == '_' || c == '$' ||
2504 c == '.';
2505}
2506
2507bool AsmParser::expandMacro(raw_svector_ostream &OS, StringRef Body,
2508 ArrayRef<MCAsmMacroParameter> Parameters,
2509 ArrayRef<MCAsmMacroArgument> A,
2510 bool EnableAtPseudoVariable, SMLoc L) {
2511 unsigned NParameters = Parameters.size();
2512 bool HasVararg = NParameters ? Parameters.back().Vararg : false;
2513 if ((!IsDarwin || NParameters != 0) && NParameters != A.size())
2514 return Error(L, "Wrong number of arguments");
2515
2516 // A macro without parameters is handled differently on Darwin:
2517 // gas accepts no arguments and does no substitutions
2518 while (!Body.empty()) {
2519 // Scan for the next substitution.
2520 std::size_t End = Body.size(), Pos = 0;
2521 for (; Pos != End; ++Pos) {
2522 // Check for a substitution or escape.
2523 if (IsDarwin && !NParameters) {
2524 // This macro has no parameters, look for $0, $1, etc.
2525 if (Body[Pos] != '$' || Pos + 1 == End)
2526 continue;
2527
2528 char Next = Body[Pos + 1];
2529 if (Next == '$' || Next == 'n' ||
2530 isdigit(static_cast<unsigned char>(Next)))
2531 break;
2532 } else {
2533 // This macro has parameters, look for \foo, \bar, etc.
2534 if (Body[Pos] == '\\' && Pos + 1 != End)
2535 break;
2536 }
2537 }
2538
2539 // Add the prefix.
2540 OS << Body.slice(0, Pos);
2541
2542 // Check if we reached the end.
2543 if (Pos == End)
2544 break;
2545
2546 if (IsDarwin && !NParameters) {
2547 switch (Body[Pos + 1]) {
2548 // $$ => $
2549 case '$':
2550 OS << '$';
2551 break;
2552
2553 // $n => number of arguments
2554 case 'n':
2555 OS << A.size();
2556 break;
2557
2558 // $[0-9] => argument
2559 default: {
2560 // Missing arguments are ignored.
2561 unsigned Index = Body[Pos + 1] - '0';
2562 if (Index >= A.size())
2563 break;
2564
2565 // Otherwise substitute with the token values, with spaces eliminated.
2566 for (const AsmToken &Token : A[Index])
2567 OS << Token.getString();
2568 break;
2569 }
2570 }
2571 Pos += 2;
2572 } else {
2573 unsigned I = Pos + 1;
2574
2575 // Check for the \@ pseudo-variable.
2576 if (EnableAtPseudoVariable && Body[I] == '@' && I + 1 != End)
2577 ++I;
2578 else
2579 while (isIdentifierChar(Body[I]) && I + 1 != End)
2580 ++I;
2581
2582 const char *Begin = Body.data() + Pos + 1;
2583 StringRef Argument(Begin, I - (Pos + 1));
2584 unsigned Index = 0;
2585
2586 if (Argument == "@") {
2587 OS << NumOfMacroInstantiations;
2588 Pos += 2;
2589 } else {
2590 for (; Index < NParameters; ++Index)
2591 if (Parameters[Index].Name == Argument)
2592 break;
2593
2594 if (Index == NParameters) {
2595 if (Body[Pos + 1] == '(' && Body[Pos + 2] == ')')
2596 Pos += 3;
2597 else {
2598 OS << '\\' << Argument;
2599 Pos = I;
2600 }
2601 } else {
2602 bool VarargParameter = HasVararg && Index == (NParameters - 1);
2603 for (const AsmToken &Token : A[Index])
2604 // For altmacro mode, you can write '%expr'.
2605 // The prefix '%' evaluates the expression 'expr'
2606 // and uses the result as a string (e.g. replace %(1+2) with the
2607 // string "3").
2608 // Here, we identify the integer token which is the result of the
2609 // absolute expression evaluation and replace it with its string
2610 // representation.
2611 if (AltMacroMode && Token.getString().front() == '%' &&
2612 Token.is(AsmToken::Integer))
2613 // Emit an integer value to the buffer.
2614 OS << Token.getIntVal();
2615 // Only Token that was validated as a string and begins with '<'
2616 // is considered altMacroString!!!
2617 else if (AltMacroMode && Token.getString().front() == '<' &&
2618 Token.is(AsmToken::String)) {
2619 OS << angleBracketString(Token.getStringContents());
2620 }
2621 // We expect no quotes around the string's contents when
2622 // parsing for varargs.
2623 else if (Token.isNot(AsmToken::String) || VarargParameter)
2624 OS << Token.getString();
2625 else
2626 OS << Token.getStringContents();
2627
2628 Pos += 1 + Argument.size();
2629 }
2630 }
2631 }
2632 // Update the scan point.
2633 Body = Body.substr(Pos);
2634 }
2635
2636 return false;
2637}
2638
2639static bool isOperator(AsmToken::TokenKind kind) {
2640 switch (kind) {
2641 default:
2642 return false;
2643 case AsmToken::Plus:
2644 case AsmToken::Minus:
2645 case AsmToken::Tilde:
2646 case AsmToken::Slash:
2647 case AsmToken::Star:
2648 case AsmToken::Dot:
2649 case AsmToken::Equal:
2650 case AsmToken::EqualEqual:
2651 case AsmToken::Pipe:
2652 case AsmToken::PipePipe:
2653 case AsmToken::Caret:
2654 case AsmToken::Amp:
2655 case AsmToken::AmpAmp:
2656 case AsmToken::Exclaim:
2657 case AsmToken::ExclaimEqual:
2658 case AsmToken::Less:
2659 case AsmToken::LessEqual:
2660 case AsmToken::LessLess:
2661 case AsmToken::LessGreater:
2662 case AsmToken::Greater:
2663 case AsmToken::GreaterEqual:
2664 case AsmToken::GreaterGreater:
2665 return true;
2666 }
2667}
2668
2669namespace {
2670
2671class AsmLexerSkipSpaceRAII {
2672public:
2673 AsmLexerSkipSpaceRAII(AsmLexer &Lexer, bool SkipSpace) : Lexer(Lexer) {
2674 Lexer.setSkipSpace(SkipSpace);
2675 }
2676
2677 ~AsmLexerSkipSpaceRAII() {
2678 Lexer.setSkipSpace(true);
2679 }
2680
2681private:
2682 AsmLexer &Lexer;
2683};
2684
2685} // end anonymous namespace
2686
2687bool AsmParser::parseMacroArgument(MCAsmMacroArgument &MA, bool Vararg) {
2688
2689 if (Vararg) {
2690 if (Lexer.isNot(AsmToken::EndOfStatement)) {
2691 StringRef Str = parseStringToEndOfStatement();
2692 MA.emplace_back(AsmToken::String, Str);
2693 }
2694 return false;
2695 }
2696
2697 unsigned ParenLevel = 0;
2698
2699 // Darwin doesn't use spaces to delmit arguments.
2700 AsmLexerSkipSpaceRAII ScopedSkipSpace(Lexer, IsDarwin);
2701
2702 bool SpaceEaten;
2703
2704 while (true) {
2705 SpaceEaten = false;
2706 if (Lexer.is(AsmToken::Eof) || Lexer.is(AsmToken::Equal))
2707 return TokError("unexpected token in macro instantiation");
2708
2709 if (ParenLevel == 0) {
2710
2711 if (Lexer.is(AsmToken::Comma))
2712 break;
2713
2714 if (Lexer.is(AsmToken::Space)) {
2715 SpaceEaten = true;
2716 Lexer.Lex(); // Eat spaces
2717 }
2718
2719 // Spaces can delimit parameters, but could also be part an expression.
2720 // If the token after a space is an operator, add the token and the next
2721 // one into this argument
2722 if (!IsDarwin) {
2723 if (isOperator(Lexer.getKind())) {
2724 MA.push_back(getTok());
2725 Lexer.Lex();
2726
2727 // Whitespace after an operator can be ignored.
2728 if (Lexer.is(AsmToken::Space))
2729 Lexer.Lex();
2730
2731 continue;
2732 }
2733 }
2734 if (SpaceEaten)
2735 break;
2736 }
2737
2738 // handleMacroEntry relies on not advancing the lexer here
2739 // to be able to fill in the remaining default parameter values
2740 if (Lexer.is(AsmToken::EndOfStatement))
2741 break;
2742
2743 // Adjust the current parentheses level.
2744 if (Lexer.is(AsmToken::LParen))
2745 ++ParenLevel;
2746 else if (Lexer.is(AsmToken::RParen) && ParenLevel)
2747 --ParenLevel;
2748
2749 // Append the token to the current argument list.
2750 MA.push_back(getTok());
2751 Lexer.Lex();
2752 }
2753
2754 if (ParenLevel != 0)
2755 return TokError("unbalanced parentheses in macro argument");
2756 return false;
2757}
2758
2759// Parse the macro instantiation arguments.
2760bool AsmParser::parseMacroArguments(const MCAsmMacro *M,
2761 MCAsmMacroArguments &A) {
2762 const unsigned NParameters = M ? M->Parameters.size() : 0;
2763 bool NamedParametersFound = false;
2764 SmallVector<SMLoc, 4> FALocs;
2765
2766 A.resize(NParameters);
2767 FALocs.resize(NParameters);
2768
2769 // Parse two kinds of macro invocations:
2770 // - macros defined without any parameters accept an arbitrary number of them
2771 // - macros defined with parameters accept at most that many of them
2772 bool HasVararg = NParameters ? M->Parameters.back().Vararg : false;
2773 for (unsigned Parameter = 0; !NParameters || Parameter < NParameters;
2774 ++Parameter) {
2775 SMLoc IDLoc = Lexer.getLoc();
2776 MCAsmMacroParameter FA;
2777
2778 if (Lexer.is(AsmToken::Identifier) && Lexer.peekTok().is(AsmToken::Equal)) {
2779 if (parseIdentifier(FA.Name))
2780 return Error(IDLoc, "invalid argument identifier for formal argument");
2781
2782 if (Lexer.isNot(AsmToken::Equal))
2783 return TokError("expected '=' after formal parameter identifier");
2784
2785 Lex();
2786
2787 NamedParametersFound = true;
2788 }
2789 bool Vararg = HasVararg && Parameter == (NParameters - 1);
2790
2791 if (NamedParametersFound && FA.Name.empty())
2792 return Error(IDLoc, "cannot mix positional and keyword arguments");
2793
2794 SMLoc StrLoc = Lexer.getLoc();
2795 SMLoc EndLoc;
2796 if (AltMacroMode && Lexer.is(AsmToken::Percent)) {
2797 const MCExpr *AbsoluteExp;
2798 int64_t Value;
2799 /// Eat '%'
2800 Lex();
2801 if (parseExpression(AbsoluteExp, EndLoc))
2802 return false;
2803 if (!AbsoluteExp->evaluateAsAbsolute(Value,
2804 getStreamer().getAssemblerPtr()))
2805 return Error(StrLoc, "expected absolute expression");
2806 const char *StrChar = StrLoc.getPointer();
2807 const char *EndChar = EndLoc.getPointer();
2808 AsmToken newToken(AsmToken::Integer,
2809 StringRef(StrChar, EndChar - StrChar), Value);
2810 FA.Value.push_back(newToken);
2811 } else if (AltMacroMode && Lexer.is(AsmToken::Less) &&
2812 isAngleBracketString(StrLoc, EndLoc)) {
2813 const char *StrChar = StrLoc.getPointer();
2814 const char *EndChar = EndLoc.getPointer();
2815 jumpToLoc(EndLoc, CurBuffer);
2816 /// Eat from '<' to '>'
2817 Lex();
2818 AsmToken newToken(AsmToken::String,
2819 StringRef(StrChar, EndChar - StrChar));
2820 FA.Value.push_back(newToken);
2821 } else if(parseMacroArgument(FA.Value, Vararg))
2822 return true;
2823
2824 unsigned PI = Parameter;
2825 if (!FA.Name.empty()) {
2826 unsigned FAI = 0;
2827 for (FAI = 0; FAI < NParameters; ++FAI)
2828 if (M->Parameters[FAI].Name == FA.Name)
2829 break;
2830
2831 if (FAI >= NParameters) {
2832 assert(M && "expected macro to be defined")(static_cast <bool> (M && "expected macro to be defined"
) ? void (0) : __assert_fail ("M && \"expected macro to be defined\""
, "llvm/lib/MC/MCParser/AsmParser.cpp", 2832, __extension__ __PRETTY_FUNCTION__
))
;
2833 return Error(IDLoc, "parameter named '" + FA.Name +
2834 "' does not exist for macro '" + M->Name + "'");
2835 }
2836 PI = FAI;
2837 }
2838
2839 if (!FA.Value.empty()) {
2840 if (A.size() <= PI)
2841 A.resize(PI + 1);
2842 A[PI] = FA.Value;
2843
2844 if (FALocs.size() <= PI)
2845 FALocs.resize(PI + 1);
2846
2847 FALocs[PI] = Lexer.getLoc();
2848 }
2849
2850 // At the end of the statement, fill in remaining arguments that have
2851 // default values. If there aren't any, then the next argument is
2852 // required but missing
2853 if (Lexer.is(AsmToken::EndOfStatement)) {
2854 bool Failure = false;
2855 for (unsigned FAI = 0; FAI < NParameters; ++FAI) {
2856 if (A[FAI].empty()) {
2857 if (M->Parameters[FAI].Required) {
2858 Error(FALocs[FAI].isValid() ? FALocs[FAI] : Lexer.getLoc(),
2859 "missing value for required parameter "
2860 "'" + M->Parameters[FAI].Name + "' in macro '" + M->Name + "'");
2861 Failure = true;
2862 }
2863
2864 if (!M->Parameters[FAI].Value.empty())
2865 A[FAI] = M->Parameters[FAI].Value;
2866 }
2867 }
2868 return Failure;
2869 }
2870
2871 if (Lexer.is(AsmToken::Comma))
2872 Lex();
2873 }
2874
2875 return TokError("too many positional arguments");
2876}
2877
2878bool AsmParser::handleMacroEntry(const MCAsmMacro *M, SMLoc NameLoc) {
2879 // Arbitrarily limit macro nesting depth (default matches 'as'). We can
2880 // eliminate this, although we should protect against infinite loops.
2881 unsigned MaxNestingDepth = AsmMacroMaxNestingDepth;
2882 if (ActiveMacros.size() == MaxNestingDepth) {
2883 std::ostringstream MaxNestingDepthError;
2884 MaxNestingDepthError << "macros cannot be nested more than "
2885 << MaxNestingDepth << " levels deep."
2886 << " Use -asm-macro-max-nesting-depth to increase "
2887 "this limit.";
2888 return TokError(MaxNestingDepthError.str());
2889 }
2890
2891 MCAsmMacroArguments A;
2892 if (parseMacroArguments(M, A))
2893 return true;
2894
2895 // Macro instantiation is lexical, unfortunately. We construct a new buffer
2896 // to hold the macro body with substitutions.
2897 SmallString<256> Buf;
2898 StringRef Body = M->Body;
2899 raw_svector_ostream OS(Buf);
2900
2901 if (expandMacro(OS, Body, M->Parameters, A, true, getTok().getLoc()))
2902 return true;
2903
2904 // We include the .endmacro in the buffer as our cue to exit the macro
2905 // instantiation.
2906 OS << ".endmacro\n";
2907
2908 std::unique_ptr<MemoryBuffer> Instantiation =
2909 MemoryBuffer::getMemBufferCopy(OS.str(), "<instantiation>");
2910
2911 // Create the macro instantiation object and add to the current macro
2912 // instantiation stack.
2913 MacroInstantiation *MI = new MacroInstantiation{
2914 NameLoc, CurBuffer, getTok().getLoc(), TheCondStack.size()};
2915 ActiveMacros.push_back(MI);
2916
2917 ++NumOfMacroInstantiations;
2918
2919 // Jump to the macro instantiation and prime the lexer.
2920 CurBuffer = SrcMgr.AddNewSourceBuffer(std::move(Instantiation), SMLoc());
2921 Lexer.setBuffer(SrcMgr.getMemoryBuffer(CurBuffer)->getBuffer());
2922 Lex();
2923
2924 return false;
2925}
2926
2927void AsmParser::handleMacroExit() {
2928 // Jump to the EndOfStatement we should return to, and consume it.
2929 jumpToLoc(ActiveMacros.back()->ExitLoc, ActiveMacros.back()->ExitBuffer);
2930 Lex();
2931
2932 // Pop the instantiation entry.
2933 delete ActiveMacros.back();
2934 ActiveMacros.pop_back();
2935}
2936
2937bool AsmParser::parseAssignment(StringRef Name, AssignmentKind Kind) {
2938 MCSymbol *Sym;
2939 const MCExpr *Value;
2940 SMLoc ExprLoc = getTok().getLoc();
2941 bool AllowRedef =
2942 Kind == AssignmentKind::Set || Kind == AssignmentKind::Equal;
2943 if (MCParserUtils::parseAssignmentExpression(Name, AllowRedef, *this, Sym,
2944 Value))
2945 return true;
2946
2947 if (!Sym) {
2948 // In the case where we parse an expression starting with a '.', we will
2949 // not generate an error, nor will we create a symbol. In this case we
2950 // should just return out.
2951 return false;
2952 }
2953
2954 if (discardLTOSymbol(Name))
2955 return false;
2956
2957 // Do the assignment.
2958 switch (Kind) {
2959 case AssignmentKind::Equal:
2960 Out.emitAssignment(Sym, Value);
2961 break;
2962 case AssignmentKind::Set:
2963 case AssignmentKind::Equiv:
2964 Out.emitAssignment(Sym, Value);
2965 Out.emitSymbolAttribute(Sym, MCSA_NoDeadStrip);
2966 break;
2967 case AssignmentKind::LTOSetConditional:
2968 if (Value->getKind() != MCExpr::SymbolRef)
2969 return Error(ExprLoc, "expected identifier");
2970
2971 Out.emitConditionalAssignment(Sym, Value);
2972 break;
2973 }
2974
2975 return false;
2976}
2977
2978/// parseIdentifier:
2979/// ::= identifier
2980/// ::= string
2981bool AsmParser::parseIdentifier(StringRef &Res) {
2982 // The assembler has relaxed rules for accepting identifiers, in particular we
2983 // allow things like '.globl $foo' and '.def @feat.00', which would normally be
2984 // separate tokens. At this level, we have already lexed so we cannot (currently)
2985 // handle this as a context dependent token, instead we detect adjacent tokens
2986 // and return the combined identifier.
2987 if (Lexer.is(AsmToken::Dollar) || Lexer.is(AsmToken::At)) {
2988 SMLoc PrefixLoc = getLexer().getLoc();
2989
2990 // Consume the prefix character, and check for a following identifier.
2991
2992 AsmToken Buf[1];
2993 Lexer.peekTokens(Buf, false);
2994
2995 if (Buf[0].isNot(AsmToken::Identifier) && Buf[0].isNot(AsmToken::Integer))
2996 return true;
2997
2998 // We have a '$' or '@' followed by an identifier or integer token, make
2999 // sure they are adjacent.
3000 if (PrefixLoc.getPointer() + 1 != Buf[0].getLoc().getPointer())
3001 return true;
3002
3003 // eat $ or @
3004 Lexer.Lex(); // Lexer's Lex guarantees consecutive token.
3005 // Construct the joined identifier and consume the token.
3006 Res = StringRef(PrefixLoc.getPointer(), getTok().getString().size() + 1);
3007 Lex(); // Parser Lex to maintain invariants.
3008 return false;
3009 }
3010
3011 if (Lexer.isNot(AsmToken::Identifier) && Lexer.isNot(AsmToken::String))
3012 return true;
3013
3014 Res = getTok().getIdentifier();
3015
3016 Lex(); // Consume the identifier token.
3017
3018 return false;
3019}
3020
3021/// parseDirectiveSet:
3022/// ::= .equ identifier ',' expression
3023/// ::= .equiv identifier ',' expression
3024/// ::= .set identifier ',' expression
3025/// ::= .lto_set_conditional identifier ',' expression
3026bool AsmParser::parseDirectiveSet(StringRef IDVal, AssignmentKind Kind) {
3027 StringRef Name;
3028 if (check(parseIdentifier(Name), "expected identifier") || parseComma() ||
3029 parseAssignment(Name, Kind))
3030 return true;
3031 return false;
3032}
3033
3034bool AsmParser::parseEscapedString(std::string &Data) {
3035 if (check(getTok().isNot(AsmToken::String), "expected string"))
3036 return true;
3037
3038 Data = "";
3039 StringRef Str = getTok().getStringContents();
3040 for (unsigned i = 0, e = Str.size(); i != e; ++i) {
3041 if (Str[i] != '\\') {
3042 Data += Str[i];
3043 continue;
3044 }
3045
3046 // Recognize escaped characters. Note that this escape semantics currently
3047 // loosely follows Darwin 'as'.
3048 ++i;
3049 if (i == e)
3050 return TokError("unexpected backslash at end of string");
3051
3052 // Recognize hex sequences similarly to GNU 'as'.
3053 if (Str[i] == 'x' || Str[i] == 'X') {
3054 size_t length = Str.size();
3055 if (i + 1 >= length || !isHexDigit(Str[i + 1]))
3056 return TokError("invalid hexadecimal escape sequence");
3057
3058 // Consume hex characters. GNU 'as' reads all hexadecimal characters and
3059 // then truncates to the lower 16 bits. Seems reasonable.
3060 unsigned Value = 0;
3061 while (i + 1 < length && isHexDigit(Str[i + 1]))
3062 Value = Value * 16 + hexDigitValue(Str[++i]);
3063
3064 Data += (unsigned char)(Value & 0xFF);
3065 continue;
3066 }
3067
3068 // Recognize octal sequences.
3069 if ((unsigned)(Str[i] - '0') <= 7) {
3070 // Consume up to three octal characters.
3071 unsigned Value = Str[i] - '0';
3072
3073 if (i + 1 != e && ((unsigned)(Str[i + 1] - '0')) <= 7) {
3074 ++i;
3075 Value = Value * 8 + (Str[i] - '0');
3076
3077 if (i + 1 != e && ((unsigned)(Str[i + 1] - '0')) <= 7) {
3078 ++i;
3079 Value = Value * 8 + (Str[i] - '0');
3080 }
3081 }
3082
3083 if (Value > 255)
3084 return TokError("invalid octal escape sequence (out of range)");
3085
3086 Data += (unsigned char)Value;
3087 continue;
3088 }
3089
3090 // Otherwise recognize individual escapes.
3091 switch (Str[i]) {
3092 default:
3093 // Just reject invalid escape sequences for now.
3094 return TokError("invalid escape sequence (unrecognized character)");
3095
3096 case 'b': Data += '\b'; break;
3097 case 'f': Data += '\f'; break;
3098 case 'n': Data += '\n'; break;
3099 case 'r': Data += '\r'; break;
3100 case 't': Data += '\t'; break;
3101 case '"': Data += '"'; break;
3102 case '\\': Data += '\\'; break;
3103 }
3104 }
3105
3106 Lex();
3107 return false;
3108}
3109
3110bool AsmParser::parseAngleBracketString(std::string &Data) {
3111 SMLoc EndLoc, StartLoc = getTok().getLoc();
3112 if (isAngleBracketString(StartLoc, EndLoc)) {
3113 const char *StartChar = StartLoc.getPointer() + 1;
3114 const char *EndChar = EndLoc.getPointer() - 1;
3115 jumpToLoc(EndLoc, CurBuffer);
3116 /// Eat from '<' to '>'
3117 Lex();
3118
3119 Data = angleBracketString(StringRef(StartChar, EndChar - StartChar));
3120 return false;
3121 }
3122 return true;
3123}
3124
3125/// parseDirectiveAscii:
3126// ::= .ascii [ "string"+ ( , "string"+ )* ]
3127/// ::= ( .asciz | .string ) [ "string" ( , "string" )* ]
3128bool AsmParser::parseDirectiveAscii(StringRef IDVal, bool ZeroTerminated) {
3129 auto parseOp = [&]() -> bool {
3130 std::string Data;
3131 if (checkForValidSection())
3132 return true;
3133 // Only support spaces as separators for .ascii directive for now. See the
3134 // discusssion at https://reviews.llvm.org/D91460 for more details.
3135 do {
3136 if (parseEscapedString(Data))
3137 return true;
3138 getStreamer().emitBytes(Data);
3139 } while (!ZeroTerminated && getTok().is(AsmToken::String));
3140 if (ZeroTerminated)
3141 getStreamer().emitBytes(StringRef("\0", 1));
3142 return false;
3143 };
3144
3145 return parseMany(parseOp);
3146}
3147
3148/// parseDirectiveReloc
3149/// ::= .reloc expression , identifier [ , expression ]
3150bool AsmParser::parseDirectiveReloc(SMLoc DirectiveLoc) {
3151 const MCExpr *Offset;
3152 const MCExpr *Expr = nullptr;
3153 SMLoc OffsetLoc = Lexer.getTok().getLoc();
3154
3155 if (parseExpression(Offset))
3156 return true;
3157 if (parseComma() ||
3158 check(getTok().isNot(AsmToken::Identifier), "expected relocation name"))
3159 return true;
3160
3161 SMLoc NameLoc = Lexer.getTok().getLoc();
3162 StringRef Name = Lexer.getTok().getIdentifier();
3163 Lex();
3164
3165 if (Lexer.is(AsmToken::Comma)) {
3166 Lex();
3167 SMLoc ExprLoc = Lexer.getLoc();
3168 if (parseExpression(Expr))
3169 return true;
3170
3171 MCValue Value;
3172 if (!Expr->evaluateAsRelocatable(Value, nullptr, nullptr))
3173 return Error(ExprLoc, "expression must be relocatable");
3174 }
3175
3176 if (parseEOL())
3177 return true;
3178
3179 const MCTargetAsmParser &MCT = getTargetParser();
3180 const MCSubtargetInfo &STI = MCT.getSTI();
3181 if (Optional<std::pair<bool, std::string>> Err =
3182 getStreamer().emitRelocDirective(*Offset, Name, Expr, DirectiveLoc,
3183 STI))
3184 return Error(Err->first ? NameLoc : OffsetLoc, Err->second);
3185
3186 return false;
3187}
3188
3189/// parseDirectiveValue
3190/// ::= (.byte | .short | ... ) [ expression (, expression)* ]
3191bool AsmParser::parseDirectiveValue(StringRef IDVal, unsigned Size) {
3192 auto parseOp = [&]() -> bool {
3193 const MCExpr *Value;
3194 SMLoc ExprLoc = getLexer().getLoc();
3195 if (checkForValidSection() || parseExpression(Value))
3196 return true;
3197 // Special case constant expressions to match code generator.
3198 if (const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Value)) {
3199 assert(Size <= 8 && "Invalid size")(static_cast <bool> (Size <= 8 && "Invalid size"
) ? void (0) : __assert_fail ("Size <= 8 && \"Invalid size\""
, "llvm/lib/MC/MCParser/AsmParser.cpp", 3199, __extension__ __PRETTY_FUNCTION__
))
;
3200 uint64_t IntValue = MCE->getValue();
3201 if (!isUIntN(8 * Size, IntValue) && !isIntN(8 * Size, IntValue))
3202 return Error(ExprLoc, "out of range literal value");
3203 getStreamer().emitIntValue(IntValue, Size);
3204 } else
3205 getStreamer().emitValue(Value, Size, ExprLoc);
3206 return false;
3207 };
3208
3209 return parseMany(parseOp);
3210}
3211
3212static bool parseHexOcta(AsmParser &Asm, uint64_t &hi, uint64_t &lo) {
3213 if (Asm.getTok().isNot(AsmToken::Integer) &&
3214 Asm.getTok().isNot(AsmToken::BigNum))
3215 return Asm.TokError("unknown token in expression");
3216 SMLoc ExprLoc = Asm.getTok().getLoc();
3217 APInt IntValue = Asm.getTok().getAPIntVal();
3218 Asm.Lex();
3219 if (!IntValue.isIntN(128))
3220 return Asm.Error(ExprLoc, "out of range literal value");
3221 if (!IntValue.isIntN(64)) {
3222 hi = IntValue.getHiBits(IntValue.getBitWidth() - 64).getZExtValue();
3223 lo = IntValue.getLoBits(64).getZExtValue();
3224 } else {
3225 hi = 0;
3226 lo = IntValue.getZExtValue();
3227 }
3228 return false;
3229}
3230
3231/// ParseDirectiveOctaValue
3232/// ::= .octa [ hexconstant (, hexconstant)* ]
3233
3234bool AsmParser::parseDirectiveOctaValue(StringRef IDVal) {
3235 auto parseOp = [&]() -> bool {
3236 if (checkForValidSection())
3237 return true;
3238 uint64_t hi, lo;
3239 if (parseHexOcta(*this, hi, lo))
3240 return true;
3241 if (MAI.isLittleEndian()) {
3242 getStreamer().emitInt64(lo);
3243 getStreamer().emitInt64(hi);
3244 } else {
3245 getStreamer().emitInt64(hi);
3246 getStreamer().emitInt64(lo);
3247 }
3248 return false;
3249 };
3250
3251 return parseMany(parseOp);
3252}
3253
3254bool AsmParser::parseRealValue(const fltSemantics &Semantics, APInt &Res) {
3255 // We don't truly support arithmetic on floating point expressions, so we
3256 // have to manually parse unary prefixes.
3257 bool IsNeg = false;
3258 if (getLexer().is(AsmToken::Minus)) {
3259 Lexer.Lex();
3260 IsNeg = true;
3261 } else if (getLexer().is(AsmToken::Plus))
3262 Lexer.Lex();
3263
3264 if (Lexer.is(AsmToken::Error))
3265 return TokError(Lexer.getErr());
3266 if (Lexer.isNot(AsmToken::Integer) && Lexer.isNot(AsmToken::Real) &&
3267 Lexer.isNot(AsmToken::Identifier))
3268 return TokError("unexpected token in directive");
3269
3270 // Convert to an APFloat.
3271 APFloat Value(Semantics);
3272 StringRef IDVal = getTok().getString();
3273 if (getLexer().is(AsmToken::Identifier)) {
3274 if (!IDVal.compare_insensitive("infinity") ||
3275 !IDVal.compare_insensitive("inf"))
3276 Value = APFloat::getInf(Semantics);
3277 else if (!IDVal.compare_insensitive("nan"))
3278 Value = APFloat::getNaN(Semantics, false, ~0);
3279 else
3280 return TokError("invalid floating point literal");
3281 } else if (errorToBool(
3282 Value.convertFromString(IDVal, APFloat::rmNearestTiesToEven)
3283 .takeError()))
3284 return TokError("invalid floating point literal");
3285 if (IsNeg)
3286 Value.changeSign();
3287
3288 // Consume the numeric token.
3289 Lex();
3290
3291 Res = Value.bitcastToAPInt();
3292
3293 return false;
3294}
3295
3296/// parseDirectiveRealValue
3297/// ::= (.single | .double) [ expression (, expression)* ]
3298bool AsmParser::parseDirectiveRealValue(StringRef IDVal,
3299 const fltSemantics &Semantics) {
3300 auto parseOp = [&]() -> bool {
3301 APInt AsInt;
3302 if (checkForValidSection() || parseRealValue(Semantics, AsInt))
3303 return true;
3304 getStreamer().emitIntValue(AsInt.getLimitedValue(),
3305 AsInt.getBitWidth() / 8);
3306 return false;
3307 };
3308
3309 return parseMany(parseOp);
3310}
3311
3312/// parseDirectiveZero
3313/// ::= .zero expression
3314bool AsmParser::parseDirectiveZero() {
3315 SMLoc NumBytesLoc = Lexer.getLoc();
3316 const MCExpr *NumBytes;
3317 if (checkForValidSection() || parseExpression(NumBytes))
3318 return true;
3319
3320 int64_t Val = 0;
3321 if (getLexer().is(AsmToken::Comma)) {
3322 Lex();
3323 if (parseAbsoluteExpression(Val))
3324 return true;
3325 }
3326
3327 if (parseEOL())
3328 return true;
3329 getStreamer().emitFill(*NumBytes, Val, NumBytesLoc);
3330
3331 return false;
3332}
3333
3334/// parseDirectiveFill
3335/// ::= .fill expression [ , expression [ , expression ] ]
3336bool AsmParser::parseDirectiveFill() {
3337 SMLoc NumValuesLoc = Lexer.getLoc();
3338 const MCExpr *NumValues;
3339 if (checkForValidSection() || parseExpression(NumValues))
3340 return true;
3341
3342 int64_t FillSize = 1;
3343 int64_t FillExpr = 0;
3344
3345 SMLoc SizeLoc, ExprLoc;
3346
3347 if (parseOptionalToken(AsmToken::Comma)) {
3348 SizeLoc = getTok().getLoc();
3349 if (parseAbsoluteExpression(FillSize))
3350 return true;
3351 if (parseOptionalToken(AsmToken::Comma)) {
3352 ExprLoc = getTok().getLoc();
3353 if (parseAbsoluteExpression(FillExpr))
3354 return true;
3355 }
3356 }
3357 if (parseEOL())
3358 return true;
3359
3360 if (FillSize < 0) {
3361 Warning(SizeLoc, "'.fill' directive with negative size has no effect");
3362 return false;
3363 }
3364 if (FillSize > 8) {
3365 Warning(SizeLoc, "'.fill' directive with size greater than 8 has been truncated to 8");
3366 FillSize = 8;
3367 }
3368
3369 if (!isUInt<32>(FillExpr) && FillSize > 4)
3370 Warning(ExprLoc, "'.fill' directive pattern has been truncated to 32-bits");
3371
3372 getStreamer().emitFill(*NumValues, FillSize, FillExpr, NumValuesLoc);
3373
3374 return false;
3375}
3376
3377/// parseDirectiveOrg
3378/// ::= .org expression [ , expression ]
3379bool AsmParser::parseDirectiveOrg() {
3380 const MCExpr *Offset;
3381 SMLoc OffsetLoc = Lexer.getLoc();
3382 if (checkForValidSection() || parseExpression(Offset))
3383 return true;
3384
3385 // Parse optional fill expression.
3386 int64_t FillExpr = 0;
3387 if (parseOptionalToken(AsmToken::Comma))
3388 if (parseAbsoluteExpression(FillExpr))
3389 return true;
3390 if (parseEOL())
3391 return true;
3392
3393 getStreamer().emitValueToOffset(Offset, FillExpr, OffsetLoc);
3394 return false;
3395}
3396
3397/// parseDirectiveAlign
3398/// ::= {.align, ...} expression [ , expression [ , expression ]]
3399bool AsmParser::parseDirectiveAlign(bool IsPow2, unsigned ValueSize) {
3400 SMLoc AlignmentLoc = getLexer().getLoc();
3401 int64_t Alignment;
3402 SMLoc MaxBytesLoc;
3403 bool HasFillExpr = false;
3404 int64_t FillExpr = 0;
3405 int64_t MaxBytesToFill = 0;
3406
3407 auto parseAlign = [&]() -> bool {
3408 if (parseAbsoluteExpression(Alignment))
3409 return true;
3410 if (parseOptionalToken(AsmToken::Comma)) {
3411 // The fill expression can be omitted while specifying a maximum number of
3412 // alignment bytes, e.g:
3413 // .align 3,,4
3414 if (getTok().isNot(AsmToken::Comma)) {
3415 HasFillExpr = true;
3416 if (parseAbsoluteExpression(FillExpr))
3417 return true;
3418 }
3419 if (parseOptionalToken(AsmToken::Comma))
3420 if (parseTokenLoc(MaxBytesLoc) ||
3421 parseAbsoluteExpression(MaxBytesToFill))
3422 return true;
3423 }
3424 return parseEOL();
3425 };
3426
3427 if (checkForValidSection())
3428 return true;
3429 // Ignore empty '.p2align' directives for GNU-as compatibility
3430 if (IsPow2 && (ValueSize == 1) && getTok().is(AsmToken::EndOfStatement)) {
3431 Warning(AlignmentLoc, "p2align directive with no operand(s) is ignored");
3432 return parseEOL();
3433 }
3434 if (parseAlign())
3435 return true;
3436
3437 // Always emit an alignment here even if we thrown an error.
3438 bool ReturnVal = false;
3439
3440 // Compute alignment in bytes.
3441 if (IsPow2) {
3442 // FIXME: Diagnose overflow.
3443 if (Alignment >= 32) {
3444 ReturnVal |= Error(AlignmentLoc, "invalid alignment value");
3445 Alignment = 31;
3446 }
3447
3448 Alignment = 1ULL << Alignment;
3449 } else {
3450 // Reject alignments that aren't either a power of two or zero,
3451 // for gas compatibility. Alignment of zero is silently rounded
3452 // up to one.
3453 if (Alignment == 0)
3454 Alignment = 1;
3455 if (!isPowerOf2_64(Alignment))
3456 ReturnVal |= Error(AlignmentLoc, "alignment must be a power of 2");
3457 if (!isUInt<32>(Alignment))
3458 ReturnVal |= Error(AlignmentLoc, "alignment must be smaller than 2**32");
3459 }
3460
3461 // Diagnose non-sensical max bytes to align.
3462 if (MaxBytesLoc.isValid()) {
3463 if (MaxBytesToFill < 1) {
3464 ReturnVal |= Error(MaxBytesLoc,
3465 "alignment directive can never be satisfied in this "
3466 "many bytes, ignoring maximum bytes expression");
3467 MaxBytesToFill = 0;
3468 }
3469
3470 if (MaxBytesToFill >= Alignment) {
3471 Warning(MaxBytesLoc, "maximum bytes expression exceeds alignment and "
3472 "has no effect");
3473 MaxBytesToFill = 0;
3474 }
3475 }
3476
3477 // Check whether we should use optimal code alignment for this .align
3478 // directive.
3479 const MCSection *Section = getStreamer().getCurrentSectionOnly();
3480 assert(Section && "must have section to emit alignment")(static_cast <bool> (Section && "must have section to emit alignment"
) ? void (0) : __assert_fail ("Section && \"must have section to emit alignment\""
, "llvm/lib/MC/MCParser/AsmParser.cpp", 3480, __extension__ __PRETTY_FUNCTION__
))
;
3481 bool UseCodeAlign = Section->UseCodeAlign();
3482 if ((!HasFillExpr || Lexer.getMAI().getTextAlignFillValue() == FillExpr) &&
3483 ValueSize == 1 && UseCodeAlign) {
3484 getStreamer().emitCodeAlignment(Alignment, &getTargetParser().getSTI(),
3485 MaxBytesToFill);
3486 } else {
3487 // FIXME: Target specific behavior about how the "extra" bytes are filled.
3488 getStreamer().emitValueToAlignment(Alignment, FillExpr, ValueSize,
3489 MaxBytesToFill);
3490 }
3491
3492 return ReturnVal;
3493}
3494
3495/// parseDirectiveFile
3496/// ::= .file filename
3497/// ::= .file number [directory] filename [md5 checksum] [source source-text]
3498bool AsmParser::parseDirectiveFile(SMLoc DirectiveLoc) {
3499 // FIXME: I'm not sure what this is.
3500 int64_t FileNumber = -1;
3501 if (getLexer().is(AsmToken::Integer)) {
3502 FileNumber = getTok().getIntVal();
3503 Lex();
3504
3505 if (FileNumber < 0)
3506 return TokError("negative file number");
3507 }
3508
3509 std::string Path;
3510
3511 // Usually the directory and filename together, otherwise just the directory.
3512 // Allow the strings to have escaped octal character sequence.
3513 if (parseEscapedString(Path))
3514 return true;
3515
3516 StringRef Directory;
3517 StringRef Filename;
3518 std::string FilenameData;
3519 if (getLexer().is(AsmToken::String)) {
3520 if (check(FileNumber == -1,
3521 "explicit path specified, but no file number") ||
3522 parseEscapedString(FilenameData))
3523 return true;
3524 Filename = FilenameData;
3525 Directory = Path;
3526 } else {
3527 Filename = Path;
3528 }
3529
3530 uint64_t MD5Hi, MD5Lo;
3531 bool HasMD5 = false;
3532
3533 Optional<StringRef> Source;
3534 bool HasSource = false;
3535 std::string SourceString;
3536
3537 while (!parseOptionalToken(AsmToken::EndOfStatement)) {
3538 StringRef Keyword;
3539 if (check(getTok().isNot(AsmToken::Identifier),
3540 "unexpected token in '.file' directive") ||
3541 parseIdentifier(Keyword))
3542 return true;
3543 if (Keyword == "md5") {
3544 HasMD5 = true;
3545 if (check(FileNumber == -1,
3546 "MD5 checksum specified, but no file number") ||
3547 parseHexOcta(*this, MD5Hi, MD5Lo))
3548 return true;
3549 } else if (Keyword == "source") {
3550 HasSource = true;
3551 if (check(FileNumber == -1,
3552 "source specified, but no file number") ||
3553 check(getTok().isNot(AsmToken::String),
3554 "unexpected token in '.file' directive") ||
3555 parseEscapedString(SourceString))
3556 return true;
3557 } else {
3558 return TokError("unexpected token in '.file' directive");
3559 }
3560 }
3561
3562 if (FileNumber == -1) {
3563 // Ignore the directive if there is no number and the target doesn't support
3564 // numberless .file directives. This allows some portability of assembler
3565 // between different object file formats.
3566 if (getContext().getAsmInfo()->hasSingleParameterDotFile())
3567 getStreamer().emitFileDirective(Filename);
3568 } else {
3569 // In case there is a -g option as well as debug info from directive .file,
3570 // we turn off the -g option, directly use the existing debug info instead.
3571 // Throw away any implicit file table for the assembler source.
3572 if (Ctx.getGenDwarfForAssembly()) {
3573 Ctx.getMCDwarfLineTable(0).resetFileTable();
3574 Ctx.setGenDwarfForAssembly(false);
3575 }
3576
3577 Optional<MD5::MD5Result> CKMem;
3578 if (HasMD5) {
3579 MD5::MD5Result Sum;
3580 for (unsigned i = 0; i != 8; ++i) {
3581 Sum.Bytes[i] = uint8_t(MD5Hi >> ((7 - i) * 8));
3582 Sum.Bytes[i + 8] = uint8_t(MD5Lo >> ((7 - i) * 8));
3583 }
3584 CKMem = Sum;
3585 }
3586 if (HasSource) {
3587 char *SourceBuf = static_cast<char *>(Ctx.allocate(SourceString.size()));
3588 memcpy(SourceBuf, SourceString.data(), SourceString.size());
3589 Source = StringRef(SourceBuf, SourceString.size());
3590 }
3591 if (FileNumber == 0) {
3592 // Upgrade to Version 5 for assembly actions like clang -c a.s.
3593 if (Ctx.getDwarfVersion() < 5)
3594 Ctx.setDwarfVersion(5);
3595 getStreamer().emitDwarfFile0Directive(Directory, Filename, CKMem, Source);
3596 } else {
3597 Expected<unsigned> FileNumOrErr = getStreamer().tryEmitDwarfFileDirective(
3598 FileNumber, Directory, Filename, CKMem, Source);
3599 if (!FileNumOrErr)
3600 return Error(DirectiveLoc, toString(FileNumOrErr.takeError()));
3601 }
3602 // Alert the user if there are some .file directives with MD5 and some not.
3603 // But only do that once.
3604 if (!ReportedInconsistentMD5 && !Ctx.isDwarfMD5UsageConsistent(0)) {
3605 ReportedInconsistentMD5 = true;
3606 return Warning(DirectiveLoc, "inconsistent use of MD5 checksums");
3607 }
3608 }
3609
3610 return false;
3611}
3612
3613/// parseDirectiveLine
3614/// ::= .line [number]
3615bool AsmParser::parseDirectiveLine() {
3616 int64_t LineNumber;
3617 if (getLexer().is(AsmToken::Integer)) {
3618 if (parseIntToken(LineNumber, "unexpected token in '.line' directive"))
3619 return true;
3620 (void)LineNumber;
3621 // FIXME: Do something with the .line.
3622 }
3623 return parseEOL();
3624}
3625
3626/// parseDirectiveLoc
3627/// ::= .loc FileNumber [LineNumber] [ColumnPos] [basic_block] [prologue_end]
3628/// [epilogue_begin] [is_stmt VALUE] [isa VALUE]
3629/// The first number is a file number, must have been previously assigned with
3630/// a .file directive, the second number is the line number and optionally the
3631/// third number is a column position (zero if not specified). The remaining
3632/// optional items are .loc sub-directives.
3633bool AsmParser::parseDirectiveLoc() {
3634 int64_t FileNumber = 0, LineNumber = 0;
3635 SMLoc Loc = getTok().getLoc();
3636 if (parseIntToken(FileNumber, "unexpected token in '.loc' directive") ||
3637 check(FileNumber < 1 && Ctx.getDwarfVersion() < 5, Loc,
3638 "file number less than one in '.loc' directive") ||
3639 check(!getContext().isValidDwarfFileNumber(FileNumber), Loc,
3640 "unassigned file number in '.loc' directive"))
3641 return true;
3642
3643 // optional
3644 if (getLexer().is(AsmToken::Integer)) {
3645 LineNumber = getTok().getIntVal();
3646 if (LineNumber < 0)
3647 return TokError("line number less than zero in '.loc' directive");
3648 Lex();
3649 }
3650
3651 int64_t ColumnPos = 0;
3652 if (getLexer().is(AsmToken::Integer)) {
3653 ColumnPos = getTok().getIntVal();
3654 if (ColumnPos < 0)
3655 return TokError("column position less than zero in '.loc' directive");
3656 Lex();
3657 }
3658
3659 auto PrevFlags = getContext().getCurrentDwarfLoc().getFlags();
3660 unsigned Flags = PrevFlags & DWARF2_FLAG_IS_STMT(1 << 0);
3661 unsigned Isa = 0;
3662 int64_t Discriminator = 0;
3663
3664 auto parseLocOp = [&]() -> bool {
3665 StringRef Name;
3666 SMLoc Loc = getTok().getLoc();
3667 if (parseIdentifier(Name))
3668 return TokError("unexpected token in '.loc' directive");
3669
3670 if (Name == "basic_block")
3671 Flags |= DWARF2_FLAG_BASIC_BLOCK(1 << 1);
3672 else if (Name == "prologue_end")
3673 Flags |= DWARF2_FLAG_PROLOGUE_END(1 << 2);
3674 else if (Name == "epilogue_begin")
3675 Flags |= DWARF2_FLAG_EPILOGUE_BEGIN(1 << 3);
3676 else if (Name == "is_stmt") {
3677 Loc = getTok().getLoc();
3678 const MCExpr *Value;
3679 if (parseExpression(Value))
3680 return true;
3681 // The expression must be the constant 0 or 1.
3682 if (const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Value)) {
3683 int Value = MCE->getValue();
3684 if (Value == 0)
3685 Flags &= ~DWARF2_FLAG_IS_STMT(1 << 0);
3686 else if (Value == 1)
3687 Flags |= DWARF2_FLAG_IS_STMT(1 << 0);
3688 else
3689 return Error(Loc, "is_stmt value not 0 or 1");
3690 } else {
3691 return Error(Loc, "is_stmt value not the constant value of 0 or 1");
3692 }
3693 } else if (Name == "isa") {
3694 Loc = getTok().getLoc();
3695 const MCExpr *Value;
3696 if (parseExpression(Value))
3697 return true;
3698 // The expression must be a constant greater or equal to 0.
3699 if (const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Value)) {
3700 int Value = MCE->getValue();
3701 if (Value < 0)
3702 return Error(Loc, "isa number less than zero");
3703 Isa = Value;
3704 } else {
3705 return Error(Loc, "isa number not a constant value");
3706 }
3707 } else if (Name == "discriminator") {
3708 if (parseAbsoluteExpression(Discriminator))
3709 return true;
3710 } else {
3711 return Error(Loc, "unknown sub-directive in '.loc' directive");
3712 }
3713 return false;
3714 };
3715
3716 if (parseMany(parseLocOp, false /*hasComma*/))
3717 return true;
3718
3719 getStreamer().emitDwarfLocDirective(FileNumber, LineNumber, ColumnPos, Flags,
3720 Isa, Discriminator, StringRef());
3721
3722 return false;
3723}
3724
3725/// parseDirectiveStabs
3726/// ::= .stabs string, number, number, number
3727bool AsmParser::parseDirectiveStabs() {
3728 return TokError("unsupported directive '.stabs'");
3729}
3730
3731/// parseDirectiveCVFile
3732/// ::= .cv_file number filename [checksum] [checksumkind]
3733bool AsmParser::parseDirectiveCVFile() {
3734 SMLoc FileNumberLoc = getTok().getLoc();
3735 int64_t FileNumber;
3736 std::string Filename;
3737 std::string Checksum;
3738 int64_t ChecksumKind = 0;
3739
3740 if (parseIntToken(FileNumber,
3741 "expected file number in '.cv_file' directive") ||
3742 check(FileNumber < 1, FileNumberLoc, "file number less than one") ||
3743 check(getTok().isNot(AsmToken::String),
3744 "unexpected token in '.cv_file' directive") ||
3745 parseEscapedString(Filename))
3746 return true;
3747 if (!parseOptionalToken(AsmToken::EndOfStatement)) {
3748 if (check(getTok().isNot(AsmToken::String),
3749 "unexpected token in '.cv_file' directive") ||
3750 parseEscapedString(Checksum) ||
3751 parseIntToken(ChecksumKind,
3752 "expected checksum kind in '.cv_file' directive") ||
3753 parseToken(AsmToken::EndOfStatement,
3754 "unexpected token in '.cv_file' directive"))
3755 return true;
3756 }
3757
3758 Checksum = fromHex(Checksum);
3759 void *CKMem = Ctx.allocate(Checksum.size(), 1);
3760 memcpy(CKMem, Checksum.data(), Checksum.size());
3761 ArrayRef<uint8_t> ChecksumAsBytes(reinterpret_cast<const uint8_t *>(CKMem),
3762 Checksum.size());
3763
3764 if (!getStreamer().EmitCVFileDirective(FileNumber, Filename, ChecksumAsBytes,
3765 static_cast<uint8_t>(ChecksumKind)))
3766 return Error(FileNumberLoc, "file number already allocated");
3767
3768 return false;
3769}
3770
3771bool AsmParser::parseCVFunctionId(int64_t &FunctionId,
3772 StringRef DirectiveName) {
3773 SMLoc Loc;
3774 return parseTokenLoc(Loc) ||
3775 parseIntToken(FunctionId, "expected function id in '" + DirectiveName +
3776 "' directive") ||
3777 check(FunctionId < 0 || FunctionId >= UINT_MAX(2147483647 *2U +1U), Loc,
3778 "expected function id within range [0, UINT_MAX)");
3779}
3780
3781bool AsmParser::parseCVFileId(int64_t &FileNumber, StringRef DirectiveName) {
3782 SMLoc Loc;
3783 return parseTokenLoc(Loc) ||
3784 parseIntToken(FileNumber, "expected integer in '" + DirectiveName +
3785 "' directive") ||
3786 check(FileNumber < 1, Loc, "file number less than one in '" +
3787 DirectiveName + "' directive") ||
3788 check(!getCVContext().isValidFileNumber(FileNumber), Loc,
3789 "unassigned file number in '" + DirectiveName + "' directive");
3790}
3791
3792/// parseDirectiveCVFuncId
3793/// ::= .cv_func_id FunctionId
3794///
3795/// Introduces a function ID that can be used with .cv_loc.
3796bool AsmParser::parseDirectiveCVFuncId() {
3797 SMLoc FunctionIdLoc = getTok().getLoc();
3798 int64_t FunctionId;
3799
3800 if (parseCVFunctionId(FunctionId, ".cv_func_id") ||
3801 parseToken(AsmToken::EndOfStatement,
3802 "unexpected token in '.cv_func_id' directive"))
3803 return true;
3804
3805 if (!getStreamer().EmitCVFuncIdDirective(FunctionId))
3806 return Error(FunctionIdLoc, "function id already allocated");
3807
3808 return false;
3809}
3810
3811/// parseDirectiveCVInlineSiteId
3812/// ::= .cv_inline_site_id FunctionId
3813/// "within" IAFunc
3814/// "inlined_at" IAFile IALine [IACol]
3815///
3816/// Introduces a function ID that can be used with .cv_loc. Includes "inlined
3817/// at" source location information for use in the line table of the caller,
3818/// whether the caller is a real function or another inlined call site.
3819bool AsmParser::parseDirectiveCVInlineSiteId() {
3820 SMLoc FunctionIdLoc = getTok().getLoc();
3821 int64_t FunctionId;
3822 int64_t IAFunc;
3823 int64_t IAFile;
3824 int64_t IALine;
3825 int64_t IACol = 0;
3826
3827 // FunctionId
3828 if (parseCVFunctionId(FunctionId, ".cv_inline_site_id"))
3829 return true;
3830
3831 // "within"
3832 if (check((getLexer().isNot(AsmToken::Identifier) ||
3833 getTok().getIdentifier() != "within"),
3834 "expected 'within' identifier in '.cv_inline_site_id' directive"))
3835 return true;
3836 Lex();
3837
3838 // IAFunc
3839 if (parseCVFunctionId(IAFunc, ".cv_inline_site_id"))
3840 return true;
3841
3842 // "inlined_at"
3843 if (check((getLexer().isNot(AsmToken::Identifier) ||
3844 getTok().getIdentifier() != "inlined_at"),
3845 "expected 'inlined_at' identifier in '.cv_inline_site_id' "
3846 "directive") )
3847 return true;
3848 Lex();
3849
3850 // IAFile IALine
3851 if (parseCVFileId(IAFile, ".cv_inline_site_id") ||
3852 parseIntToken(IALine, "expected line number after 'inlined_at'"))
3853 return true;
3854
3855 // [IACol]
3856 if (getLexer().is(AsmToken::Integer)) {
3857 IACol = getTok().getIntVal();
3858 Lex();
3859 }
3860
3861 if (parseToken(AsmToken::EndOfStatement,
3862 "unexpected token in '.cv_inline_site_id' directive"))
3863 return true;
3864
3865 if (!getStreamer().EmitCVInlineSiteIdDirective(FunctionId, IAFunc, IAFile,
3866 IALine, IACol, FunctionIdLoc))
3867 return Error(FunctionIdLoc, "function id already allocated");
3868
3869 return false;
3870}
3871
3872/// parseDirectiveCVLoc
3873/// ::= .cv_loc FunctionId FileNumber [LineNumber] [ColumnPos] [prologue_end]
3874/// [is_stmt VALUE]
3875/// The first number is a file number, must have been previously assigned with
3876/// a .file directive, the second number is the line number and optionally the
3877/// third number is a column position (zero if not specified). The remaining
3878/// optional items are .loc sub-directives.
3879bool AsmParser::parseDirectiveCVLoc() {
3880 SMLoc DirectiveLoc = getTok().getLoc();
3881 int64_t FunctionId, FileNumber;
3882 if (parseCVFunctionId(FunctionId, ".cv_loc") ||
3883 parseCVFileId(FileNumber, ".cv_loc"))
3884 return true;
3885
3886 int64_t LineNumber = 0;
3887 if (getLexer().is(AsmToken::Integer)) {
3888 LineNumber = getTok().getIntVal();
3889 if (LineNumber < 0)
3890 return TokError("line number less than zero in '.cv_loc' directive");
3891 Lex();
3892 }
3893
3894 int64_t ColumnPos = 0;
3895 if (getLexer().is(AsmToken::Integer)) {
3896 ColumnPos = getTok().getIntVal();
3897 if (ColumnPos < 0)
3898 return TokError("column position less than zero in '.cv_loc' directive");
3899 Lex();
3900 }
3901
3902 bool PrologueEnd = false;
3903 uint64_t IsStmt = 0;
3904
3905 auto parseOp = [&]() -> bool {
3906 StringRef Name;
3907 SMLoc Loc = getTok().getLoc();
3908 if (parseIdentifier(Name))
3909 return TokError("unexpected token in '.cv_loc' directive");
3910 if (Name == "prologue_end")
3911 PrologueEnd = true;
3912 else if (Name == "is_stmt") {
3913 Loc = getTok().getLoc();
3914 const MCExpr *Value;
3915 if (parseExpression(Value))
3916 return true;
3917 // The expression must be the constant 0 or 1.
3918 IsStmt = ~0ULL;
3919 if (const auto *MCE = dyn_cast<MCConstantExpr>(Value))
3920 IsStmt = MCE->getValue();
3921
3922 if (IsStmt > 1)
3923 return Error(Loc, "is_stmt value not 0 or 1");
3924 } else {
3925 return Error(Loc, "unknown sub-directive in '.cv_loc' directive");
3926 }
3927 return false;
3928 };
3929
3930 if (parseMany(parseOp, false /*hasComma*/))
3931 return true;
3932
3933 getStreamer().emitCVLocDirective(FunctionId, FileNumber, LineNumber,
3934 ColumnPos, PrologueEnd, IsStmt, StringRef(),
3935 DirectiveLoc);
3936 return false;
3937}
3938
3939/// parseDirectiveCVLinetable
3940/// ::= .cv_linetable FunctionId, FnStart, FnEnd
3941bool AsmParser::parseDirectiveCVLinetable() {
3942 int64_t FunctionId;
3943 StringRef FnStartName, FnEndName;
3944 SMLoc Loc = getTok().getLoc();
3945 if (parseCVFunctionId(FunctionId, ".cv_linetable") || parseComma() ||
3946 parseTokenLoc(Loc) ||
3947 check(parseIdentifier(FnStartName), Loc,
3948 "expected identifier in directive") ||
3949 parseComma() || parseTokenLoc(Loc) ||
3950 check(parseIdentifier(FnEndName), Loc,
3951 "expected identifier in directive"))
3952 return true;
3953
3954 MCSymbol *FnStartSym = getContext().getOrCreateSymbol(FnStartName);
3955 MCSymbol *FnEndSym = getContext().getOrCreateSymbol(FnEndName);
3956
3957 getStreamer().emitCVLinetableDirective(FunctionId, FnStartSym, FnEndSym);
3958 return false;
3959}
3960
3961/// parseDirectiveCVInlineLinetable
3962/// ::= .cv_inline_linetable PrimaryFunctionId FileId LineNum FnStart FnEnd
3963bool AsmParser::parseDirectiveCVInlineLinetable() {
3964 int64_t PrimaryFunctionId, SourceFileId, SourceLineNum;
3965 StringRef FnStartName, FnEndName;
3966 SMLoc Loc = getTok().getLoc();
3967 if (parseCVFunctionId(PrimaryFunctionId, ".cv_inline_linetable") ||
3968 parseTokenLoc(Loc) ||
3969 parseIntToken(
3970 SourceFileId,
3971 "expected SourceField in '.cv_inline_linetable' directive") ||
3972 check(SourceFileId <= 0, Loc,
3973 "File id less than zero in '.cv_inline_linetable' directive") ||
3974 parseTokenLoc(Loc) ||
3975 parseIntToken(
3976 SourceLineNum,
3977 "expected SourceLineNum in '.cv_inline_linetable' directive") ||
3978 check(SourceLineNum < 0, Loc,
3979 "Line number less than zero in '.cv_inline_linetable' directive") ||
3980 parseTokenLoc(Loc) || check(parseIdentifier(FnStartName), Loc,
3981 "expected identifier in directive") ||
3982 parseTokenLoc(Loc) || check(parseIdentifier(FnEndName), Loc,
3983 "expected identifier in directive"))
3984 return true;
3985
3986 if (parseToken(AsmToken::EndOfStatement, "Expected End of Statement"))
3987 return true;
3988
3989 MCSymbol *FnStartSym = getContext().getOrCreateSymbol(FnStartName);
3990 MCSymbol *FnEndSym = getContext().getOrCreateSymbol(FnEndName);
3991 getStreamer().emitCVInlineLinetableDirective(PrimaryFunctionId, SourceFileId,
3992 SourceLineNum, FnStartSym,
3993 FnEndSym);
3994 return false;
3995}
3996
3997void AsmParser::initializeCVDefRangeTypeMap() {
3998 CVDefRangeTypeMap["reg"] = CVDR_DEFRANGE_REGISTER;
3999 CVDefRangeTypeMap["frame_ptr_rel"] = CVDR_DEFRANGE_FRAMEPOINTER_REL;
4000 CVDefRangeTypeMap["subfield_reg"] = CVDR_DEFRANGE_SUBFIELD_REGISTER;
4001 CVDefRangeTypeMap["reg_rel"] = CVDR_DEFRANGE_REGISTER_REL;
4002}
4003
4004/// parseDirectiveCVDefRange
4005/// ::= .cv_def_range RangeStart RangeEnd (GapStart GapEnd)*, bytes*
4006bool AsmParser::parseDirectiveCVDefRange() {
4007 SMLoc Loc;
4008 std::vector<std::pair<const MCSymbol *, const MCSymbol *>> Ranges;
4009 while (getLexer().is(AsmToken::Identifier)) {
4010 Loc = getLexer().getLoc();
4011 StringRef GapStartName;
4012 if (parseIdentifier(GapStartName))
4013 return Error(Loc, "expected identifier in directive");
4014 MCSymbol *GapStartSym = getContext().getOrCreateSymbol(GapStartName);
4015
4016 Loc = getLexer().getLoc();
4017 StringRef GapEndName;
4018 if (parseIdentifier(GapEndName))
4019 return Error(Loc, "expected identifier in directive");
4020 MCSymbol *GapEndSym = getContext().getOrCreateSymbol(GapEndName);
4021
4022 Ranges.push_back({GapStartSym, GapEndSym});
4023 }
4024
4025 StringRef CVDefRangeTypeStr;
4026 if (parseToken(
4027 AsmToken::Comma,
4028 "expected comma before def_range type in .cv_def_range directive") ||
4029 parseIdentifier(CVDefRangeTypeStr))
4030 return Error(Loc, "expected def_range type in directive");
4031
4032 StringMap<CVDefRangeType>::const_iterator CVTypeIt =
4033 CVDefRangeTypeMap.find(CVDefRangeTypeStr);
4034 CVDefRangeType CVDRType = (CVTypeIt == CVDefRangeTypeMap.end())
4035 ? CVDR_DEFRANGE
4036 : CVTypeIt->getValue();
4037 switch (CVDRType) {
4038 case CVDR_DEFRANGE_REGISTER: {
4039 int64_t DRRegister;
4040 if (parseToken(AsmToken::Comma, "expected comma before register number in "
4041 ".cv_def_range directive") ||
4042 parseAbsoluteExpression(DRRegister))
4043 return Error(Loc, "expected register number");
4044
4045 codeview::DefRangeRegisterHeader DRHdr;
4046 DRHdr.Register = DRRegister;
4047 DRHdr.MayHaveNoName = 0;
4048 getStreamer().emitCVDefRangeDirective(Ranges, DRHdr);
4049 break;
4050 }
4051 case CVDR_DEFRANGE_FRAMEPOINTER_REL: {
4052 int64_t DROffset;
4053 if (parseToken(AsmToken::Comma,
4054 "expected comma before offset in .cv_def_range directive") ||
4055 parseAbsoluteExpression(DROffset))
4056 return Error(Loc, "expected offset value");
4057
4058 codeview::DefRangeFramePointerRelHeader DRHdr;
4059 DRHdr.Offset = DROffset;
4060 getStreamer().emitCVDefRangeDirective(Ranges, DRHdr);
4061 break;
4062 }
4063 case CVDR_DEFRANGE_SUBFIELD_REGISTER: {
4064 int64_t DRRegister;
4065 int64_t DROffsetInParent;
4066 if (parseToken(AsmToken::Comma, "expected comma before register number in "
4067 ".cv_def_range directive") ||
4068 parseAbsoluteExpression(DRRegister))
4069 return Error(Loc, "expected register number");
4070 if (parseToken(AsmToken::Comma,
4071 "expected comma before offset in .cv_def_range directive") ||
4072 parseAbsoluteExpression(DROffsetInParent))
4073 return Error(Loc, "expected offset value");
4074
4075 codeview::DefRangeSubfieldRegisterHeader DRHdr;
4076 DRHdr.Register = DRRegister;
4077 DRHdr.MayHaveNoName = 0;
4078 DRHdr.OffsetInParent = DROffsetInParent;
4079 getStreamer().emitCVDefRangeDirective(Ranges, DRHdr);
4080 break;
4081 }
4082 case CVDR_DEFRANGE_REGISTER_REL: {
4083 int64_t DRRegister;
4084 int64_t DRFlags;
4085 int64_t DRBasePointerOffset;
4086 if (parseToken(AsmToken::Comma, "expected comma before register number in "
4087 ".cv_def_range directive") ||
4088 parseAbsoluteExpression(DRRegister))
4089 return Error(Loc, "expected register value");
4090 if (parseToken(
4091 AsmToken::Comma,
4092 "expected comma before flag value in .cv_def_range directive") ||
4093 parseAbsoluteExpression(DRFlags))
4094 return Error(Loc, "expected flag value");
4095 if (parseToken(AsmToken::Comma, "expected comma before base pointer offset "
4096 "in .cv_def_range directive") ||
4097 parseAbsoluteExpression(DRBasePointerOffset))
4098 return Error(Loc, "expected base pointer offset value");
4099
4100 codeview::DefRangeRegisterRelHeader DRHdr;
4101 DRHdr.Register = DRRegister;
4102 DRHdr.Flags = DRFlags;
4103 DRHdr.BasePointerOffset = DRBasePointerOffset;
4104 getStreamer().emitCVDefRangeDirective(Ranges, DRHdr);
4105 break;
4106 }
4107 default:
4108 return Error(Loc, "unexpected def_range type in .cv_def_range directive");
4109 }
4110 return true;
4111}
4112
4113/// parseDirectiveCVString
4114/// ::= .cv_stringtable "string"
4115bool AsmParser::parseDirectiveCVString() {
4116 std::string Data;
4117 if (checkForValidSection() || parseEscapedString(Data))
4118 return true;
4119
4120 // Put the string in the table and emit the offset.
4121 std::pair<StringRef, unsigned> Insertion =
4122 getCVContext().addToStringTable(Data);
4123 getStreamer().emitInt32(Insertion.second);
4124 return false;
4125}
4126
4127/// parseDirectiveCVStringTable
4128/// ::= .cv_stringtable
4129bool AsmParser::parseDirectiveCVStringTable() {
4130 getStreamer().emitCVStringTableDirective();
4131 return false;
4132}
4133
4134/// parseDirectiveCVFileChecksums
4135/// ::= .cv_filechecksums
4136bool AsmParser::parseDirectiveCVFileChecksums() {
4137 getStreamer().emitCVFileChecksumsDirective();
4138 return false;
4139}
4140
4141/// parseDirectiveCVFileChecksumOffset
4142/// ::= .cv_filechecksumoffset fileno
4143bool AsmParser::parseDirectiveCVFileChecksumOffset() {
4144 int64_t FileNo;
4145 if (parseIntToken(FileNo, "expected identifier in directive"))
4146 return true;
4147 if (parseToken(AsmToken::EndOfStatement, "Expected End of Statement"))
4148 return true;
4149 getStreamer().emitCVFileChecksumOffsetDirective(FileNo);
4150 return false;
4151}
4152
4153/// parseDirectiveCVFPOData
4154/// ::= .cv_fpo_data procsym
4155bool AsmParser::parseDirectiveCVFPOData() {
4156 SMLoc DirLoc = getLexer().getLoc();
4157 StringRef ProcName;
4158 if (parseIdentifier(ProcName))
4159 return TokError("expected symbol name");
4160 if (parseEOL())
4161 return true;
4162 MCSymbol *ProcSym = getContext().getOrCreateSymbol(ProcName);
4163 getStreamer().EmitCVFPOData(ProcSym, DirLoc);
4164 return false;
4165}
4166
4167/// parseDirectiveCFISections
4168/// ::= .cfi_sections section [, section]
4169bool AsmParser::parseDirectiveCFISections() {
4170 StringRef Name;
4171 bool EH = false;
4172 bool Debug = false;
4173
4174 if (!parseOptionalToken(AsmToken::EndOfStatement)) {
4175 for (;;) {
4176 if (parseIdentifier(Name))
4177 return TokError("expected .eh_frame or .debug_frame");
4178 if (Name == ".eh_frame")
4179 EH = true;
4180 else if (Name == ".debug_frame")
4181 Debug = true;
4182 if (parseOptionalToken(AsmToken::EndOfStatement))
4183 break;
4184 if (parseComma())
4185 return true;
4186 }
4187 }
4188 getStreamer().emitCFISections(EH, Debug);
4189 return false;
4190}
4191
4192/// parseDirectiveCFIStartProc
4193/// ::= .cfi_startproc [simple]
4194bool AsmParser::parseDirectiveCFIStartProc() {
4195 StringRef Simple;
4196 if (!parseOptionalToken(AsmToken::EndOfStatement)) {
4197 if (check(parseIdentifier(Simple) || Simple != "simple",
4198 "unexpected token") ||
4199 parseEOL())
4200 return true;
4201 }
4202
4203 // TODO(kristina): Deal with a corner case of incorrect diagnostic context
4204 // being produced if this directive is emitted as part of preprocessor macro
4205 // expansion which can *ONLY* happen if Clang's cc1as is the API consumer.
4206 // Tools like llvm-mc on the other hand are not affected by it, and report
4207 // correct context information.
4208 getStreamer().emitCFIStartProc(!Simple.empty(), Lexer.getLoc());
4209 return false;
4210}
4211
4212/// parseDirectiveCFIEndProc
4213/// ::= .cfi_endproc
4214bool AsmParser::parseDirectiveCFIEndProc() {
4215 if (parseEOL())
4216 return true;
4217 getStreamer().emitCFIEndProc();
4218 return false;
4219}
4220
4221/// parse register name or number.
4222bool AsmParser::parseRegisterOrRegisterNumber(int64_t &Register,
4223 SMLoc DirectiveLoc) {
4224 unsigned RegNo;
4225
4226 if (getLexer().isNot(AsmToken::Integer)) {
4227 if (getTargetParser().ParseRegister(RegNo, DirectiveLoc, DirectiveLoc))
4228 return true;
4229 Register = getContext().getRegisterInfo()->getDwarfRegNum(RegNo, true);
4230 } else
4231 return parseAbsoluteExpression(Register);
4232
4233 return false;
4234}
4235
4236/// parseDirectiveCFIDefCfa
4237/// ::= .cfi_def_cfa register, offset
4238bool AsmParser::parseDirectiveCFIDefCfa(SMLoc DirectiveLoc) {
4239 int64_t Register = 0, Offset = 0;
4240 if (parseRegisterOrRegisterNumber(Register, DirectiveLoc) || parseComma() ||
4241 parseAbsoluteExpression(Offset) || parseEOL())
4242 return true;
4243
4244 getStreamer().emitCFIDefCfa(Register, Offset);
4245 return false;
4246}
4247
4248/// parseDirectiveCFIDefCfaOffset
4249/// ::= .cfi_def_cfa_offset offset
4250bool AsmParser::parseDirectiveCFIDefCfaOffset() {
4251 int64_t Offset = 0;
4252 if (parseAbsoluteExpression(Offset) || parseEOL())
4253 return true;
4254
4255 getStreamer().emitCFIDefCfaOffset(Offset);
4256 return false;
4257}
4258
4259/// parseDirectiveCFIRegister
4260/// ::= .cfi_register register, register
4261bool AsmParser::parseDirectiveCFIRegister(SMLoc DirectiveLoc) {
4262 int64_t Register1 = 0, Register2 = 0;
4263 if (parseRegisterOrRegisterNumber(Register1, DirectiveLoc) || parseComma() ||
4264 parseRegisterOrRegisterNumber(Register2, DirectiveLoc) || parseEOL())
4265 return true;
4266
4267 getStreamer().emitCFIRegister(Register1, Register2);
4268 return false;
4269}
4270
4271/// parseDirectiveCFIWindowSave
4272/// ::= .cfi_window_save
4273bool AsmParser::parseDirectiveCFIWindowSave() {
4274 if (parseEOL())
4275 return true;
4276 getStreamer().emitCFIWindowSave();
4277 return false;
4278}
4279
4280/// parseDirectiveCFIAdjustCfaOffset
4281/// ::= .cfi_adjust_cfa_offset adjustment
4282bool AsmParser::parseDirectiveCFIAdjustCfaOffset() {
4283 int64_t Adjustment = 0;
4284 if (parseAbsoluteExpression(Adjustment) || parseEOL())
4285 return true;
4286
4287 getStreamer().emitCFIAdjustCfaOffset(Adjustment);
4288 return false;
4289}
4290
4291/// parseDirectiveCFIDefCfaRegister
4292/// ::= .cfi_def_cfa_register register
4293bool AsmParser::parseDirectiveCFIDefCfaRegister(SMLoc DirectiveLoc) {
4294 int64_t Register = 0;
4295 if (parseRegisterOrRegisterNumber(Register, DirectiveLoc) || parseEOL())
4296 return true;
4297
4298 getStreamer().emitCFIDefCfaRegister(Register);
4299 return false;
4300}
4301
4302/// parseDirectiveCFILLVMDefAspaceCfa
4303/// ::= .cfi_llvm_def_aspace_cfa register, offset, address_space
4304bool AsmParser::parseDirectiveCFILLVMDefAspaceCfa(SMLoc DirectiveLoc) {
4305 int64_t Register = 0, Offset = 0, AddressSpace = 0;
4306 if (parseRegisterOrRegisterNumber(Register, DirectiveLoc) || parseComma() ||
4307 parseAbsoluteExpression(Offset) || parseComma() ||
4308 parseAbsoluteExpression(AddressSpace) || parseEOL())
4309 return true;
4310
4311 getStreamer().emitCFILLVMDefAspaceCfa(Register, Offset, AddressSpace);
4312 return false;
4313}
4314
4315/// parseDirectiveCFIOffset
4316/// ::= .cfi_offset register, offset
4317bool AsmParser::parseDirectiveCFIOffset(SMLoc DirectiveLoc) {
4318 int64_t Register = 0;
4319 int64_t Offset = 0;
4320
4321 if (parseRegisterOrRegisterNumber(Register, DirectiveLoc) || parseComma() ||
4322 parseAbsoluteExpression(Offset) || parseEOL())
4323 return true;
4324
4325 getStreamer().emitCFIOffset(Register, Offset);
4326 return false;
4327}
4328
4329/// parseDirectiveCFIRelOffset
4330/// ::= .cfi_rel_offset register, offset
4331bool AsmParser::parseDirectiveCFIRelOffset(SMLoc DirectiveLoc) {
4332 int64_t Register = 0, Offset = 0;
4333
4334 if (parseRegisterOrRegisterNumber(Register, DirectiveLoc) || parseComma() ||
4335 parseAbsoluteExpression(Offset) || parseEOL())
4336 return true;
4337
4338 getStreamer().emitCFIRelOffset(Register, Offset);
4339 return false;
4340}
4341
4342static bool isValidEncoding(int64_t Encoding) {
4343 if (Encoding & ~0xff)
4344 return false;
4345
4346 if (Encoding == dwarf::DW_EH_PE_omit)
4347 return true;
4348
4349 const unsigned Format = Encoding & 0xf;
4350 if (Format != dwarf::DW_EH_PE_absptr && Format != dwarf::DW_EH_PE_udata2 &&
4351 Format != dwarf::DW_EH_PE_udata4 && Format != dwarf::DW_EH_PE_udata8 &&
4352 Format != dwarf::DW_EH_PE_sdata2 && Format != dwarf::DW_EH_PE_sdata4 &&
4353 Format != dwarf::DW_EH_PE_sdata8 && Format != dwarf::DW_EH_PE_signed)
4354 return false;
4355
4356 const unsigned Application = Encoding & 0x70;
4357 if (Application != dwarf::DW_EH_PE_absptr &&
4358 Application != dwarf::DW_EH_PE_pcrel)
4359 return false;
4360
4361 return true;
4362}
4363
4364/// parseDirectiveCFIPersonalityOrLsda
4365/// IsPersonality true for cfi_personality, false for cfi_lsda
4366/// ::= .cfi_personality encoding, [symbol_name]
4367/// ::= .cfi_lsda encoding, [symbol_name]
4368bool AsmParser::parseDirectiveCFIPersonalityOrLsda(bool IsPersonality) {
4369 int64_t Encoding = 0;
4370 if (parseAbsoluteExpression(Encoding))
4371 return true;
4372 if (Encoding == dwarf::DW_EH_PE_omit)
4373 return false;
4374
4375 StringRef Name;
4376 if (check(!isValidEncoding(Encoding), "unsupported encoding.") ||
4377 parseComma() ||
4378 check(parseIdentifier(Name), "expected identifier in directive") ||
4379 parseEOL())
4380 return true;
4381
4382 MCSymbol *Sym = getContext().getOrCreateSymbol(Name);
4383
4384 if (IsPersonality)
4385 getStreamer().emitCFIPersonality(Sym, Encoding);
4386 else
4387 getStreamer().emitCFILsda(Sym, Encoding);
4388 return false;
4389}
4390
4391/// parseDirectiveCFIRememberState
4392/// ::= .cfi_remember_state
4393bool AsmParser::parseDirectiveCFIRememberState() {
4394 if (parseEOL())
4395 return true;
4396 getStreamer().emitCFIRememberState();
4397 return false;
4398}
4399
4400/// parseDirectiveCFIRestoreState
4401/// ::= .cfi_remember_state
4402bool AsmParser::parseDirectiveCFIRestoreState() {
4403 if (parseEOL())
4404 return true;
4405 getStreamer().emitCFIRestoreState();
4406 return false;
4407}
4408
4409/// parseDirectiveCFISameValue
4410/// ::= .cfi_same_value register
4411bool AsmParser::parseDirectiveCFISameValue(SMLoc DirectiveLoc) {
4412 int64_t Register = 0;
4413
4414 if (parseRegisterOrRegisterNumber(Register, DirectiveLoc) || parseEOL())
4415 return true;
4416
4417 getStreamer().emitCFISameValue(Register);
4418 return false;
4419}
4420
4421/// parseDirectiveCFIRestore
4422/// ::= .cfi_restore register
4423bool AsmParser::parseDirectiveCFIRestore(SMLoc DirectiveLoc) {
4424 int64_t Register = 0;
4425 if (parseRegisterOrRegisterNumber(Register, DirectiveLoc) || parseEOL())
4426 return true;
4427
4428 getStreamer().emitCFIRestore(Register);
4429 return false;
4430}
4431
4432/// parseDirectiveCFIEscape
4433/// ::= .cfi_escape expression[,...]
4434bool AsmParser::parseDirectiveCFIEscape() {
4435 std::string Values;
4436 int64_t CurrValue;
4437 if (parseAbsoluteExpression(CurrValue))
4438 return true;
4439
4440 Values.push_back((uint8_t)CurrValue);
4441
4442 while (getLexer().is(AsmToken::Comma)) {
4443 Lex();
4444
4445 if (parseAbsoluteExpression(CurrValue))
4446 return true;
4447
4448 Values.push_back((uint8_t)CurrValue);
4449 }
4450
4451 getStreamer().emitCFIEscape(Values);
4452 return false;
4453}
4454
4455/// parseDirectiveCFIReturnColumn
4456/// ::= .cfi_return_column register
4457bool AsmParser::parseDirectiveCFIReturnColumn(SMLoc DirectiveLoc) {
4458 int64_t Register = 0;
4459 if (parseRegisterOrRegisterNumber(Register, DirectiveLoc) || parseEOL())
4460 return true;
4461 getStreamer().emitCFIReturnColumn(Register);
4462 return false;
4463}
4464
4465/// parseDirectiveCFISignalFrame
4466/// ::= .cfi_signal_frame
4467bool AsmParser::parseDirectiveCFISignalFrame() {
4468 if (parseEOL())
4469 return true;
4470
4471 getStreamer().emitCFISignalFrame();
4472 return false;
4473}
4474
4475/// parseDirectiveCFIUndefined
4476/// ::= .cfi_undefined register
4477bool AsmParser::parseDirectiveCFIUndefined(SMLoc DirectiveLoc) {
4478 int64_t Register = 0;
4479
4480 if (parseRegisterOrRegisterNumber(Register, DirectiveLoc) || parseEOL())
4481 return true;
4482
4483 getStreamer().emitCFIUndefined(Register);
4484 return false;
4485}
4486
4487/// parseDirectiveAltmacro
4488/// ::= .altmacro
4489/// ::= .noaltmacro
4490bool AsmParser::parseDirectiveAltmacro(StringRef Directive) {
4491 if (parseEOL())
4492 return true;
4493 AltMacroMode = (Directive == ".altmacro");
4494 return false;
4495}
4496
4497/// parseDirectiveMacrosOnOff
4498/// ::= .macros_on
4499/// ::= .macros_off
4500bool AsmParser::parseDirectiveMacrosOnOff(StringRef Directive) {
4501 if (parseEOL())
4502 return true;
4503 setMacrosEnabled(Directive == ".macros_on");
4504 return false;
4505}
4506
4507/// parseDirectiveMacro
4508/// ::= .macro name[,] [parameters]
4509bool AsmParser::parseDirectiveMacro(SMLoc DirectiveLoc) {
4510 StringRef Name;
4511 if (parseIdentifier(Name))
4512 return TokError("expected identifier in '.macro' directive");
4513
4514 if (getLexer().is(AsmToken::Comma))
4515 Lex();
4516
4517 MCAsmMacroParameters Parameters;
4518 while (getLexer().isNot(AsmToken::EndOfStatement)) {
4519
4520 if (!Parameters.empty() && Parameters.back().Vararg)
4521 return Error(Lexer.getLoc(), "vararg parameter '" +
4522 Parameters.back().Name +
4523 "' should be the last parameter");
4524
4525 MCAsmMacroParameter Parameter;
4526 if (parseIdentifier(Parameter.Name))
4527 return TokError("expected identifier in '.macro' directive");
4528
4529 // Emit an error if two (or more) named parameters share the same name
4530 for (const MCAsmMacroParameter& CurrParam : Parameters)
4531 if (CurrParam.Name.equals(Parameter.Name))
4532 return TokError("macro '" + Name + "' has multiple parameters"
4533 " named '" + Parameter.Name + "'");
4534
4535 if (Lexer.is(AsmToken::Colon)) {
4536 Lex(); // consume ':'
4537
4538 SMLoc QualLoc;
4539 StringRef Qualifier;
4540
4541 QualLoc = Lexer.getLoc();
4542 if (parseIdentifier(Qualifier))
4543 return Error(QualLoc, "missing parameter qualifier for "
4544 "'" + Parameter.Name + "' in macro '" + Name + "'");
4545
4546 if (Qualifier == "req")
4547 Parameter.Required = true;
4548 else if (Qualifier == "vararg")
4549 Parameter.Vararg = true;
4550 else
4551 return Error(QualLoc, Qualifier + " is not a valid parameter qualifier "
4552 "for '" + Parameter.Name + "' in macro '" + Name + "'");
4553 }
4554
4555 if (getLexer().is(AsmToken::Equal)) {
4556 Lex();
4557
4558 SMLoc ParamLoc;
4559
4560 ParamLoc = Lexer.getLoc();
4561 if (parseMacroArgument(Parameter.Value, /*Vararg=*/false ))
4562 return true;
4563
4564 if (Parameter.Required)
4565 Warning(ParamLoc, "pointless default value for required parameter "
4566 "'" + Parameter.Name + "' in macro '" + Name + "'");
4567 }
4568
4569 Parameters.push_back(std::move(Parameter));
4570
4571 if (getLexer().is(AsmToken::Comma))
4572 Lex();
4573 }
4574
4575 // Eat just the end of statement.
4576 Lexer.Lex();
4577
4578 // Consuming deferred text, so use Lexer.Lex to ignore Lexing Errors
4579 AsmToken EndToken, StartToken = getTok();
4580 unsigned MacroDepth = 0;
4581 // Lex the macro definition.
4582 while (true) {
4583 // Ignore Lexing errors in macros.
4584 while (Lexer.is(AsmToken::Error)) {
4585 Lexer.Lex();
4586 }
4587
4588 // Check whether we have reached the end of the file.
4589 if (getLexer().is(AsmToken::Eof))
4590 return Error(DirectiveLoc, "no matching '.endmacro' in definition");
4591
4592 // Otherwise, check whether we have reach the .endmacro or the start of a
4593 // preprocessor line marker.
4594 if (getLexer().is(AsmToken::Identifier)) {
4595 if (getTok().getIdentifier() == ".endm" ||
4596 getTok().getIdentifier() == ".endmacro") {
4597 if (MacroDepth == 0) { // Outermost macro.
4598 EndToken = getTok();
4599 Lexer.Lex();
4600 if (getLexer().isNot(AsmToken::EndOfStatement))
4601 return TokError("unexpected token in '" + EndToken.getIdentifier() +
4602 "' directive");
4603 break;
4604 } else {
4605 // Otherwise we just found the end of an inner macro.
4606 --MacroDepth;
4607 }
4608 } else if (getTok().getIdentifier() == ".macro") {
4609 // We allow nested macros. Those aren't instantiated until the outermost
4610 // macro is expanded so just ignore them for now.
4611 ++MacroDepth;
4612 }
4613 } else if (Lexer.is(AsmToken::HashDirective)) {
4614 (void)parseCppHashLineFilenameComment(getLexer().getLoc());
4615 }
4616
4617 // Otherwise, scan til the end of the statement.
4618 eatToEndOfStatement();
4619 }
4620
4621 if (getContext().lookupMacro(Name)) {
4622 return Error(DirectiveLoc, "macro '" + Name + "' is already defined");
4623 }
4624
4625 const char *BodyStart = StartToken.getLoc().getPointer();
4626 const char *BodyEnd = EndToken.getLoc().getPointer();
4627 StringRef Body = StringRef(BodyStart, BodyEnd - BodyStart);
4628 checkForBadMacro(DirectiveLoc, Name, Body, Parameters);
4629 MCAsmMacro Macro(Name, Body, std::move(Parameters));
4630 DEBUG_WITH_TYPE("asm-macros", dbgs() << "Defining new macro:\n";do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("asm-macros")) { dbgs() << "Defining new macro:\n"; Macro
.dump(); } } while (false)
4631 Macro.dump())do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("asm-macros")) { dbgs() << "Defining new macro:\n"; Macro
.dump(); } } while (false)
;
4632 getContext().defineMacro(Name, std::move(Macro));
4633 return false;
4634}
4635
4636/// checkForBadMacro
4637///
4638/// With the support added for named parameters there may be code out there that
4639/// is transitioning from positional parameters. In versions of gas that did
4640/// not support named parameters they would be ignored on the macro definition.
4641/// But to support both styles of parameters this is not possible so if a macro
4642/// definition has named parameters but does not use them and has what appears
4643/// to be positional parameters, strings like $1, $2, ... and $n, then issue a
4644/// warning that the positional parameter found in body which have no effect.
4645/// Hoping the developer will either remove the named parameters from the macro
4646/// definition so the positional parameters get used if that was what was
4647/// intended or change the macro to use the named parameters. It is possible
4648/// this warning will trigger when the none of the named parameters are used
4649/// and the strings like $1 are infact to simply to be passed trough unchanged.
4650void AsmParser::checkForBadMacro(SMLoc DirectiveLoc, StringRef Name,
4651 StringRef Body,
4652 ArrayRef<MCAsmMacroParameter> Parameters) {
4653 // If this macro is not defined with named parameters the warning we are
4654 // checking for here doesn't apply.
4655 unsigned NParameters = Parameters.size();
4656 if (NParameters == 0)
4657 return;
4658
4659 bool NamedParametersFound = false;
4660 bool PositionalParametersFound = false;
4661
4662 // Look at the body of the macro for use of both the named parameters and what
4663 // are likely to be positional parameters. This is what expandMacro() is
4664 // doing when it finds the parameters in the body.
4665 while (!Body.empty()) {
4666 // Scan for the next possible parameter.
4667 std::size_t End = Body.size(), Pos = 0;
4668 for (; Pos != End; ++Pos) {
4669 // Check for a substitution or escape.
4670 // This macro is defined with parameters, look for \foo, \bar, etc.
4671 if (Body[Pos] == '\\' && Pos + 1 != End)
4672 break;
4673
4674 // This macro should have parameters, but look for $0, $1, ..., $n too.
4675 if (Body[Pos] != '$' || Pos + 1 == End)
4676 continue;
4677 char Next = Body[Pos + 1];
4678 if (Next == '$' || Next == 'n' ||
4679 isdigit(static_cast<unsigned char>(Next)))
4680 break;
4681 }
4682
4683 // Check if we reached the end.
4684 if (Pos == End)
4685 break;
4686
4687 if (Body[Pos] == '$') {
4688 switch (Body[Pos + 1]) {
4689 // $$ => $
4690 case '$':
4691 break;
4692
4693 // $n => number of arguments
4694 case 'n':
4695 PositionalParametersFound = true;
4696 break;
4697
4698 // $[0-9] => argument
4699 default: {
4700 PositionalParametersFound = true;
4701 break;
4702 }
4703 }
4704 Pos += 2;
4705 } else {
4706 unsigned I = Pos + 1;
4707 while (isIdentifierChar(Body[I]) && I + 1 != End)
4708 ++I;
4709
4710 const char *Begin = Body.data() + Pos + 1;
4711 StringRef Argument(Begin, I - (Pos + 1));
4712 unsigned Index = 0;
4713 for (; Index < NParameters; ++Index)
4714 if (Parameters[Index].Name == Argument)
4715 break;
4716
4717 if (Index == NParameters) {
4718 if (Body[Pos + 1] == '(' && Body[Pos + 2] == ')')
4719 Pos += 3;
4720 else {
4721 Pos = I;
4722 }
4723 } else {
4724 NamedParametersFound = true;
4725 Pos += 1 + Argument.size();
4726 }
4727 }
4728 // Update the scan point.
4729 Body = Body.substr(Pos);
4730 }
4731
4732 if (!NamedParametersFound && PositionalParametersFound)
4733 Warning(DirectiveLoc, "macro defined with named parameters which are not "
4734 "used in macro body, possible positional parameter "
4735 "found in body which will have no effect");
4736}
4737
4738/// parseDirectiveExitMacro
4739/// ::= .exitm
4740bool AsmParser::parseDirectiveExitMacro(StringRef Directive) {
4741 if (parseEOL())
4742 return true;
4743
4744 if (!isInsideMacroInstantiation())
4745 return TokError("unexpected '" + Directive + "' in file, "
4746 "no current macro definition");
4747
4748 // Exit all conditionals that are active in the current macro.
4749 while (TheCondStack.size() != ActiveMacros.back()->CondStackDepth) {
4750 TheCondState = TheCondStack.back();
4751 TheCondStack.pop_back();
4752 }
4753
4754 handleMacroExit();
4755 return false;
4756}
4757
4758/// parseDirectiveEndMacro
4759/// ::= .endm
4760/// ::= .endmacro
4761bool AsmParser::parseDirectiveEndMacro(StringRef Directive) {
4762 if (getLexer().isNot(AsmToken::EndOfStatement))
4763 return TokError("unexpected token in '" + Directive + "' directive");
4764
4765 // If we are inside a macro instantiation, terminate the current
4766 // instantiation.
4767 if (isInsideMacroInstantiation()) {
4768 handleMacroExit();
4769 return false;
4770 }
4771
4772 // Otherwise, this .endmacro is a stray entry in the file; well formed
4773 // .endmacro directives are handled during the macro definition parsing.
4774 return TokError("unexpected '" + Directive + "' in file, "
4775 "no current macro definition");
4776}
4777
4778/// parseDirectivePurgeMacro
4779/// ::= .purgem name
4780bool AsmParser::parseDirectivePurgeMacro(SMLoc DirectiveLoc) {
4781 StringRef Name;
4782 SMLoc Loc;
4783 if (parseTokenLoc(Loc) ||
4784 check(parseIdentifier(Name), Loc,
4785 "expected identifier in '.purgem' directive") ||
4786 parseEOL())
4787 return true;
4788
4789 if (!getContext().lookupMacro(Name))
4790 return Error(DirectiveLoc, "macro '" + Name + "' is not defined");
4791
4792 getContext().undefineMacro(Name);
4793 DEBUG_WITH_TYPE("asm-macros", dbgs()do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("asm-macros")) { dbgs() << "Un-defining macro: " <<
Name << "\n"; } } while (false)
4794 << "Un-defining macro: " << Name << "\n")do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("asm-macros")) { dbgs() << "Un-defining macro: " <<
Name << "\n"; } } while (false)
;
4795 return false;
4796}
4797
4798/// parseDirectiveBundleAlignMode
4799/// ::= {.bundle_align_mode} expression
4800bool AsmParser::parseDirectiveBundleAlignMode() {
4801 // Expect a single argument: an expression that evaluates to a constant
4802 // in the inclusive range 0-30.
4803 SMLoc ExprLoc = getLexer().getLoc();
4804 int64_t AlignSizePow2;
4805 if (checkForValidSection() || parseAbsoluteExpression(AlignSizePow2) ||
4806 parseEOL() ||
4807 check(AlignSizePow2 < 0 || AlignSizePow2 > 30, ExprLoc,
4808 "invalid bundle alignment size (expected between 0 and 30)"))
4809 return true;
4810
4811 // Because of AlignSizePow2's verified range we can safely truncate it to
4812 // unsigned.
4813 getStreamer().emitBundleAlignMode(static_cast<unsigned>(AlignSizePow2));
4814 return false;
4815}
4816
4817/// parseDirectiveBundleLock
4818/// ::= {.bundle_lock} [align_to_end]
4819bool AsmParser::parseDirectiveBundleLock() {
4820 if (checkForValidSection())
4821 return true;
4822 bool AlignToEnd = false;
4823
4824 StringRef Option;
4825 SMLoc Loc = getTok().getLoc();
4826 const char *kInvalidOptionError =
4827 "invalid option for '.bundle_lock' directive";
4828
4829 if (!parseOptionalToken(AsmToken::EndOfStatement)) {
4830 if (check(parseIdentifier(Option), Loc, kInvalidOptionError) ||
4831 check(Option != "align_to_end", Loc, kInvalidOptionError) || parseEOL())
4832 return true;
4833 AlignToEnd = true;
4834 }
4835
4836 getStreamer().emitBundleLock(AlignToEnd);
4837 return false;
4838}
4839
4840/// parseDirectiveBundleLock
4841/// ::= {.bundle_lock}
4842bool AsmParser::parseDirectiveBundleUnlock() {
4843 if (checkForValidSection() || parseEOL())
4844 return true;
4845
4846 getStreamer().emitBundleUnlock();
4847 return false;
4848}
4849
4850/// parseDirectiveSpace
4851/// ::= (.skip | .space) expression [ , expression ]
4852bool AsmParser::parseDirectiveSpace(StringRef IDVal) {
4853 SMLoc NumBytesLoc = Lexer.getLoc();
4854 const MCExpr *NumBytes;
4855 if (checkForValidSection() || parseExpression(NumBytes))
4856 return true;
4857
4858 int64_t FillExpr = 0;
4859 if (parseOptionalToken(AsmToken::Comma))
4860 if (parseAbsoluteExpression(FillExpr))
4861 return true;
4862 if (parseEOL())
4863 return true;
4864
4865 // FIXME: Sometimes the fill expr is 'nop' if it isn't supplied, instead of 0.
4866 getStreamer().emitFill(*NumBytes, FillExpr, NumBytesLoc);
4867
4868 return false;
4869}
4870
4871/// parseDirectiveDCB
4872/// ::= .dcb.{b, l, w} expression, expression
4873bool AsmParser::parseDirectiveDCB(StringRef IDVal, unsigned Size) {
4874 SMLoc NumValuesLoc = Lexer.getLoc();
4875 int64_t NumValues;
4876 if (checkForValidSection() || parseAbsoluteExpression(NumValues))
4877 return true;
4878
4879 if (NumValues < 0) {
4880 Warning(NumValuesLoc, "'" + Twine(IDVal) + "' directive with negative repeat count has no effect");
4881 return false;
4882 }
4883
4884 if (parseComma())
4885 return true;
4886
4887 const MCExpr *Value;
4888 SMLoc ExprLoc = getLexer().getLoc();
4889 if (parseExpression(Value))
4890 return true;
4891
4892 // Special case constant expressions to match code generator.
4893 if (const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Value)) {
4894 assert(Size <= 8 && "Invalid size")(static_cast <bool> (Size <= 8 && "Invalid size"
) ? void (0) : __assert_fail ("Size <= 8 && \"Invalid size\""
, "llvm/lib/MC/MCParser/AsmParser.cpp", 4894, __extension__ __PRETTY_FUNCTION__
))
;
4895 uint64_t IntValue = MCE->getValue();
4896 if (!isUIntN(8 * Size, IntValue) && !isIntN(8 * Size, IntValue))
4897 return Error(ExprLoc, "literal value out of range for directive");
4898 for (uint64_t i = 0, e = NumValues; i != e; ++i)
4899 getStreamer().emitIntValue(IntValue, Size);
4900 } else {
4901 for (uint64_t i = 0, e = NumValues; i != e; ++i)
4902 getStreamer().emitValue(Value, Size, ExprLoc);
4903 }
4904
4905 return parseEOL();
4906}
4907
4908/// parseDirectiveRealDCB
4909/// ::= .dcb.{d, s} expression, expression
4910bool AsmParser::parseDirectiveRealDCB(StringRef IDVal, const fltSemantics &Semantics) {
4911 SMLoc NumValuesLoc = Lexer.getLoc();
4912 int64_t NumValues;
4913 if (checkForValidSection() || parseAbsoluteExpression(NumValues))
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 if (parseComma())
4922 return true;
4923
4924 APInt AsInt;
4925 if (parseRealValue(Semantics, AsInt) || parseEOL())
4926 return true;
4927
4928 for (uint64_t i = 0, e = NumValues; i != e; ++i)
4929 getStreamer().emitIntValue(AsInt.getLimitedValue(),
4930 AsInt.getBitWidth() / 8);
4931
4932 return false;
4933}
4934
4935/// parseDirectiveDS
4936/// ::= .ds.{b, d, l, p, s, w, x} expression
4937bool AsmParser::parseDirectiveDS(StringRef IDVal, unsigned Size) {
4938 SMLoc NumValuesLoc = Lexer.getLoc();
4939 int64_t NumValues;
4940 if (checkForValidSection() || parseAbsoluteExpression(NumValues) ||
4941 parseEOL())
4942 return true;
4943
4944 if (NumValues < 0) {
4945 Warning(NumValuesLoc, "'" + Twine(IDVal) + "' directive with negative repeat count has no effect");
4946 return false;
4947 }
4948
4949 for (uint64_t i = 0, e = NumValues; i != e; ++i)
4950 getStreamer().emitFill(Size, 0);
4951
4952 return false;
4953}
4954
4955/// parseDirectiveLEB128
4956/// ::= (.sleb128 | .uleb128) [ expression (, expression)* ]
4957bool AsmParser::parseDirectiveLEB128(bool Signed) {
4958 if (checkForValidSection())
4959 return true;
4960
4961 auto parseOp = [&]() -> bool {
4962 const MCExpr *Value;
4963 if (parseExpression(Value))
4964 return true;
4965 if (Signed)
4966 getStreamer().emitSLEB128Value(Value);
4967 else
4968 getStreamer().emitULEB128Value(Value);
4969 return false;
4970 };
4971
4972 return parseMany(parseOp);
4973}
4974
4975/// parseDirectiveSymbolAttribute
4976/// ::= { ".globl", ".weak", ... } [ identifier ( , identifier )* ]
4977bool AsmParser::parseDirectiveSymbolAttribute(MCSymbolAttr Attr) {
4978 auto parseOp = [&]() -> bool {
4979 StringRef Name;
4980 SMLoc Loc = getTok().getLoc();
4981 if (parseIdentifier(Name))
4982 return Error(Loc, "expected identifier");
4983
4984 if (discardLTOSymbol(Name))
4985 return false;
4986
4987 MCSymbol *Sym = getContext().getOrCreateSymbol(Name);
4988
4989 // Assembler local symbols don't make any sense here. Complain loudly.
4990 if (Sym->isTemporary())
4991 return Error(Loc, "non-local symbol required");
4992
4993 if (!getStreamer().emitSymbolAttribute(Sym, Attr))
4994 return Error(Loc, "unable to emit symbol attribute");
4995 return false;
4996 };
4997
4998 return parseMany(parseOp);
4999}
5000
5001/// parseDirectiveComm
5002/// ::= ( .comm | .lcomm ) identifier , size_expression [ , align_expression ]
5003bool AsmParser::parseDirectiveComm(bool IsLocal) {
5004 if (checkForValidSection())
5005 return true;
5006
5007 SMLoc IDLoc = getLexer().getLoc();
5008 StringRef Name;
5009 if (parseIdentifier(Name))
5010 return TokError("expected identifier in directive");
5011
5012 // Handle the identifier as the key symbol.
5013 MCSymbol *Sym = getContext().getOrCreateSymbol(Name);
5014
5015 if (parseComma())
5016 return true;
5017
5018 int64_t Size;
5019 SMLoc SizeLoc = getLexer().getLoc();
5020 if (parseAbsoluteExpression(Size))
5021 return true;
5022
5023 int64_t Pow2Alignment = 0;
5024 SMLoc Pow2AlignmentLoc;
5025 if (getLexer().is(AsmToken::Comma)) {
5026 Lex();
5027 Pow2AlignmentLoc = getLexer().getLoc();
5028 if (parseAbsoluteExpression(Pow2Alignment))
5029 return true;
5030
5031 LCOMM::LCOMMType LCOMM = Lexer.getMAI().getLCOMMDirectiveAlignmentType();
5032 if (IsLocal && LCOMM == LCOMM::NoAlignment)
5033 return Error(Pow2AlignmentLoc, "alignment not supported on this target");
5034
5035 // If this target takes alignments in bytes (not log) validate and convert.
5036 if ((!IsLocal && Lexer.getMAI().getCOMMDirectiveAlignmentIsInBytes()) ||
5037 (IsLocal && LCOMM == LCOMM::ByteAlignment)) {
5038 if (!isPowerOf2_64(Pow2Alignment))
5039 return Error(Pow2AlignmentLoc, "alignment must be a power of 2");
5040 Pow2Alignment = Log2_64(Pow2Alignment);
5041 }
5042 }
5043
5044 if (parseEOL())
5045 return true;
5046
5047 // NOTE: a size of zero for a .comm should create a undefined symbol
5048 // but a size of .lcomm creates a bss symbol of size zero.
5049 if (Size < 0)
5050 return Error(SizeLoc, "invalid '.comm' or '.lcomm' directive size, can't "
5051 "be less than zero");
5052
5053 // NOTE: The alignment in the directive is a power of 2 value, the assembler
5054 // may internally end up wanting an alignment in bytes.
5055 // FIXME: Diagnose overflow.
5056 if (Pow2Alignment < 0)
5057 return Error(Pow2AlignmentLoc, "invalid '.comm' or '.lcomm' directive "
5058 "alignment, can't be less than zero");
5059
5060 Sym->redefineIfPossible();
5061 if (!Sym->isUndefined())
5062 return Error(IDLoc, "invalid symbol redefinition");
5063
5064 // Create the Symbol as a common or local common with Size and Pow2Alignment
5065 if (IsLocal) {
5066 getStreamer().emitLocalCommonSymbol(Sym, Size, 1 << Pow2Alignment);
5067 return false;
5068 }
5069
5070 getStreamer().emitCommonSymbol(Sym, Size, 1 << Pow2Alignment);
5071 return false;
5072}
5073
5074/// parseDirectiveAbort
5075/// ::= .abort [... message ...]
5076bool AsmParser::parseDirectiveAbort() {
5077 // FIXME: Use loc from directive.
5078 SMLoc Loc = getLexer().getLoc();
5079
5080 StringRef Str = parseStringToEndOfStatement();
5081 if (parseEOL())
5082 return true;
5083
5084 if (Str.empty())
5085 return Error(Loc, ".abort detected. Assembly stopping.");
5086 else
5087 return Error(Loc, ".abort '" + Str + "' detected. Assembly stopping.");
5088 // FIXME: Actually abort assembly here.
5089
5090 return false;
5091}
5092
5093/// parseDirectiveInclude
5094/// ::= .include "filename"
5095bool AsmParser::parseDirectiveInclude() {
5096 // Allow the strings to have escaped octal character sequence.
5097 std::string Filename;
5098 SMLoc IncludeLoc = getTok().getLoc();
5099
5100 if (check(getTok().isNot(AsmToken::String),
5101 "expected string in '.include' directive") ||
5102 parseEscapedString(Filename) ||
5103 check(getTok().isNot(AsmToken::EndOfStatement),
5104 "unexpected token in '.include' directive") ||
5105 // Attempt to switch the lexer to the included file before consuming the
5106 // end of statement to avoid losing it when we switch.
5107 check(enterIncludeFile(Filename), IncludeLoc,
5108 "Could not find include file '" + Filename + "'"))
5109 return true;
5110
5111 return false;
5112}
5113
5114/// parseDirectiveIncbin
5115/// ::= .incbin "filename" [ , skip [ , count ] ]
5116bool AsmParser::parseDirectiveIncbin() {
5117 // Allow the strings to have escaped octal character sequence.
5118 std::string Filename;
5119 SMLoc IncbinLoc = getTok().getLoc();
5120 if (check(getTok().isNot(AsmToken::String),
5121 "expected string in '.incbin' directive") ||
5122 parseEscapedString(Filename))
5123 return true;
5124
5125 int64_t Skip = 0;
5126 const MCExpr *Count = nullptr;
5127 SMLoc SkipLoc, CountLoc;
5128 if (parseOptionalToken(AsmToken::Comma)) {
5129 // The skip expression can be omitted while specifying the count, e.g:
5130 // .incbin "filename",,4
5131 if (getTok().isNot(AsmToken::Comma)) {
5132 if (parseTokenLoc(SkipLoc) || parseAbsoluteExpression(Skip))
5133 return true;
5134 }
5135 if (parseOptionalToken(AsmToken::Comma)) {
5136 CountLoc = getTok().getLoc();
5137 if (parseExpression(Count))
5138 return true;
5139 }
5140 }
5141
5142 if (parseEOL())
5143 return true;
5144
5145 if (check(Skip < 0, SkipLoc, "skip is negative"))
5146 return true;
5147
5148 // Attempt to process the included file.
5149 if (processIncbinFile(Filename, Skip, Count, CountLoc))
5150 return Error(IncbinLoc, "Could not find incbin file '" + Filename + "'");
5151 return false;
5152}
5153
5154/// parseDirectiveIf
5155/// ::= .if{,eq,ge,gt,le,lt,ne} expression
5156bool AsmParser::parseDirectiveIf(SMLoc DirectiveLoc, DirectiveKind DirKind) {
5157 TheCondStack.push_back(TheCondState);
5158 TheCondState.TheCond = AsmCond::IfCond;
5159 if (TheCondState.Ignore) {
5160 eatToEndOfStatement();
5161 } else {
5162 int64_t ExprValue;
5163 if (parseAbsoluteExpression(ExprValue) || parseEOL())
5164 return true;
5165
5166 switch (DirKind) {
5167 default:
5168 llvm_unreachable("unsupported directive")::llvm::llvm_unreachable_internal("unsupported directive", "llvm/lib/MC/MCParser/AsmParser.cpp"
, 5168)
;
5169 case DK_IF:
5170 case DK_IFNE:
5171 break;
5172 case DK_IFEQ:
5173 ExprValue = ExprValue == 0;
5174 break;
5175 case DK_IFGE:
5176 ExprValue = ExprValue >= 0;
5177 break;
5178 case DK_IFGT:
5179 ExprValue = ExprValue > 0;
5180 break;
5181 case DK_IFLE:
5182 ExprValue = ExprValue <= 0;
5183 break;
5184 case DK_IFLT:
5185 ExprValue = ExprValue < 0;
5186 break;
5187 }
5188
5189 TheCondState.CondMet = ExprValue;
5190 TheCondState.Ignore = !TheCondState.CondMet;
5191 }
5192
5193 return false;
5194}
5195
5196/// parseDirectiveIfb
5197/// ::= .ifb string
5198bool AsmParser::parseDirectiveIfb(SMLoc DirectiveLoc, bool ExpectBlank) {
5199 TheCondStack.push_back(TheCondState);
5200 TheCondState.TheCond = AsmCond::IfCond;
5201
5202 if (TheCondState.Ignore) {
5203 eatToEndOfStatement();
5204 } else {
5205 StringRef Str = parseStringToEndOfStatement();
5206
5207 if (parseEOL())
5208 return true;
5209
5210 TheCondState.CondMet = ExpectBlank == Str.empty();
5211 TheCondState.Ignore = !TheCondState.CondMet;
5212 }
5213
5214 return false;
5215}
5216
5217/// parseDirectiveIfc
5218/// ::= .ifc string1, string2
5219/// ::= .ifnc string1, string2
5220bool AsmParser::parseDirectiveIfc(SMLoc DirectiveLoc, bool ExpectEqual) {
5221 TheCondStack.push_back(TheCondState);
5222 TheCondState.TheCond = AsmCond::IfCond;
5223
5224 if (TheCondState.Ignore) {
5225 eatToEndOfStatement();
5226 } else {
5227 StringRef Str1 = parseStringToComma();
5228
5229 if (parseComma())
5230 return true;
5231
5232 StringRef Str2 = parseStringToEndOfStatement();
5233
5234 if (parseEOL())
5235 return true;
5236
5237 TheCondState.CondMet = ExpectEqual == (Str1.trim() == Str2.trim());
5238 TheCondState.Ignore = !TheCondState.CondMet;
5239 }
5240
5241 return false;
5242}
5243
5244/// parseDirectiveIfeqs
5245/// ::= .ifeqs string1, string2
5246bool AsmParser::parseDirectiveIfeqs(SMLoc DirectiveLoc, bool ExpectEqual) {
5247 if (Lexer.isNot(AsmToken::String)) {
5248 if (ExpectEqual)
5249 return TokError("expected string parameter for '.ifeqs' directive");
5250 return TokError("expected string parameter for '.ifnes' directive");
5251 }
5252
5253 StringRef String1 = getTok().getStringContents();
5254 Lex();
5255
5256 if (Lexer.isNot(AsmToken::Comma)) {
5257 if (ExpectEqual)
5258 return TokError(
5259 "expected comma after first string for '.ifeqs' directive");
5260 return TokError("expected comma after first string for '.ifnes' directive");
5261 }
5262
5263 Lex();
5264
5265 if (Lexer.isNot(AsmToken::String)) {
5266 if (ExpectEqual)
5267 return TokError("expected string parameter for '.ifeqs' directive");
5268 return TokError("expected string parameter for '.ifnes' directive");
5269 }
5270
5271 StringRef String2 = getTok().getStringContents();
5272 Lex();
5273
5274 TheCondStack.push_back(TheCondState);
5275 TheCondState.TheCond = AsmCond::IfCond;
5276 TheCondState.CondMet = ExpectEqual == (String1 == String2);
5277 TheCondState.Ignore = !TheCondState.CondMet;
5278
5279 return false;
5280}
5281
5282/// parseDirectiveIfdef
5283/// ::= .ifdef symbol
5284bool AsmParser::parseDirectiveIfdef(SMLoc DirectiveLoc, bool expect_defined) {
5285 StringRef Name;
5286 TheCondStack.push_back(TheCondState);
5287 TheCondState.TheCond = AsmCond::IfCond;
5288
5289 if (TheCondState.Ignore) {
5290 eatToEndOfStatement();
5291 } else {
5292 if (check(parseIdentifier(Name), "expected identifier after '.ifdef'") ||
5293 parseEOL())
5294 return true;
5295
5296 MCSymbol *Sym = getContext().lookupSymbol(Name);
5297
5298 if (expect_defined)
5299 TheCondState.CondMet = (Sym && !Sym->isUndefined(false));
5300 else
5301 TheCondState.CondMet = (!Sym || Sym->isUndefined(false));
5302 TheCondState.Ignore = !TheCondState.CondMet;
5303 }
5304
5305 return false;
5306}
5307
5308/// parseDirectiveElseIf
5309/// ::= .elseif expression
5310bool AsmParser::parseDirectiveElseIf(SMLoc DirectiveLoc) {
5311 if (TheCondState.TheCond != AsmCond::IfCond &&
5312 TheCondState.TheCond != AsmCond::ElseIfCond)
5313 return Error(DirectiveLoc, "Encountered a .elseif that doesn't follow an"
5314 " .if or an .elseif");
5315 TheCondState.TheCond = AsmCond::ElseIfCond;
5316
5317 bool LastIgnoreState = false;
5318 if (!TheCondStack.empty())
5319 LastIgnoreState = TheCondStack.back().Ignore;
5320 if (LastIgnoreState || TheCondState.CondMet) {
5321 TheCondState.Ignore = true;
5322 eatToEndOfStatement();
5323 } else {
5324 int64_t ExprValue;
5325 if (parseAbsoluteExpression(ExprValue))
5326 return true;
5327
5328 if (parseEOL())
5329 return true;
5330
5331 TheCondState.CondMet = ExprValue;
5332 TheCondState.Ignore = !TheCondState.CondMet;
5333 }
5334
5335 return false;
5336}
5337
5338/// parseDirectiveElse
5339/// ::= .else
5340bool AsmParser::parseDirectiveElse(SMLoc DirectiveLoc) {
5341 if (parseEOL())
5342 return true;
5343
5344 if (TheCondState.TheCond != AsmCond::IfCond &&
5345 TheCondState.TheCond != AsmCond::ElseIfCond)
5346 return Error(DirectiveLoc, "Encountered a .else that doesn't follow "
5347 " an .if or an .elseif");
5348 TheCondState.TheCond = AsmCond::ElseCond;
5349 bool LastIgnoreState = false;
5350 if (!TheCondStack.empty())
5351 LastIgnoreState = TheCondStack.back().Ignore;
5352 if (LastIgnoreState || TheCondState.CondMet)
5353 TheCondState.Ignore = true;
5354 else
5355 TheCondState.Ignore = false;
5356
5357 return false;
5358}
5359
5360/// parseDirectiveEnd
5361/// ::= .end
5362bool AsmParser::parseDirectiveEnd(SMLoc DirectiveLoc) {
5363 if (parseEOL())
5364 return true;
5365
5366 while (Lexer.isNot(AsmToken::Eof))
5367 Lexer.Lex();
5368
5369 return false;
5370}
5371
5372/// parseDirectiveError
5373/// ::= .err
5374/// ::= .error [string]
5375bool AsmParser::parseDirectiveError(SMLoc L, bool WithMessage) {
5376 if (!TheCondStack.empty()) {
5377 if (TheCondStack.back().Ignore) {
5378 eatToEndOfStatement();
5379 return false;
5380 }
5381 }
5382
5383 if (!WithMessage)
5384 return Error(L, ".err encountered");
5385
5386 StringRef Message = ".error directive invoked in source file";
5387 if (Lexer.isNot(AsmToken::EndOfStatement)) {
5388 if (Lexer.isNot(AsmToken::String))
5389 return TokError(".error argument must be a string");
5390
5391 Message = getTok().getStringContents();
5392 Lex();
5393 }
5394
5395 return Error(L, Message);
5396}
5397
5398/// parseDirectiveWarning
5399/// ::= .warning [string]
5400bool AsmParser::parseDirectiveWarning(SMLoc L) {
5401 if (!TheCondStack.empty()) {
5402 if (TheCondStack.back().Ignore) {
5403 eatToEndOfStatement();
5404 return false;
5405 }
5406 }
5407
5408 StringRef Message = ".warning directive invoked in source file";
5409
5410 if (!parseOptionalToken(AsmToken::EndOfStatement)) {
5411 if (Lexer.isNot(AsmToken::String))
5412 return TokError(".warning argument must be a string");
5413
5414 Message = getTok().getStringContents();
5415 Lex();
5416 if (parseEOL())
5417 return true;
5418 }
5419
5420 return Warning(L, Message);
5421}
5422
5423/// parseDirectiveEndIf
5424/// ::= .endif
5425bool AsmParser::parseDirectiveEndIf(SMLoc DirectiveLoc) {
5426 if (parseEOL())
5427 return true;
5428
5429 if ((TheCondState.TheCond == AsmCond::NoCond) || TheCondStack.empty())
5430 return Error(DirectiveLoc, "Encountered a .endif that doesn't follow "
5431 "an .if or .else");
5432 if (!TheCondStack.empty()) {
5433 TheCondState = TheCondStack.back();
5434 TheCondStack.pop_back();
5435 }
5436
5437 return false;
5438}
5439
5440void AsmParser::initializeDirectiveKindMap() {
5441 /* Lookup will be done with the directive
5442 * converted to lower case, so all these
5443 * keys should be lower case.
5444 * (target specific directives are handled
5445 * elsewhere)
5446 */
5447 DirectiveKindMap[".set"] = DK_SET;
5448 DirectiveKindMap[".equ"] = DK_EQU;
5449 DirectiveKindMap[".equiv"] = DK_EQUIV;
5450 DirectiveKindMap[".ascii"] = DK_ASCII;
5451 DirectiveKindMap[".asciz"] = DK_ASCIZ;
5452 DirectiveKindMap[".string"] = DK_STRING;
5453 DirectiveKindMap[".byte"] = DK_BYTE;
5454 DirectiveKindMap[".short"] = DK_SHORT;
5455 DirectiveKindMap[".value"] = DK_VALUE;
5456 DirectiveKindMap[".2byte"] = DK_2BYTE;
5457 DirectiveKindMap[".long"] = DK_LONG;
5458 DirectiveKindMap[".int"] = DK_INT;
5459 DirectiveKindMap[".4byte"] = DK_4BYTE;
5460 DirectiveKindMap[".quad"] = DK_QUAD;
5461 DirectiveKindMap[".8byte"] = DK_8BYTE;
5462 DirectiveKindMap[".octa"] = DK_OCTA;
5463 DirectiveKindMap[".single"] = DK_SINGLE;
5464 DirectiveKindMap[".float"] = DK_FLOAT;
5465 DirectiveKindMap[".double"] = DK_DOUBLE;
5466 DirectiveKindMap[".align"] = DK_ALIGN;
5467 DirectiveKindMap[".align32"] = DK_ALIGN32;
5468 DirectiveKindMap[".balign"] = DK_BALIGN;
5469 DirectiveKindMap[".balignw"] = DK_BALIGNW;
5470 DirectiveKindMap[".balignl"] = DK_BALIGNL;
5471 DirectiveKindMap[".p2align"] = DK_P2ALIGN;
5472 DirectiveKindMap[".p2alignw"] = DK_P2ALIGNW;
5473 DirectiveKindMap[".p2alignl"] = DK_P2ALIGNL;
5474 DirectiveKindMap[".org"] = DK_ORG;
5475 DirectiveKindMap[".fill"] = DK_FILL;
5476 DirectiveKindMap[".zero"] = DK_ZERO;
5477 DirectiveKindMap[".extern"] = DK_EXTERN;
5478 DirectiveKindMap[".globl"] = DK_GLOBL;
5479 DirectiveKindMap[".global"] = DK_GLOBAL;
5480 DirectiveKindMap[".lazy_reference"] = DK_LAZY_REFERENCE;
5481 DirectiveKindMap[".no_dead_strip"] = DK_NO_DEAD_STRIP;
5482 DirectiveKindMap[".symbol_resolver"] = DK_SYMBOL_RESOLVER;
5483 DirectiveKindMap[".private_extern"] = DK_PRIVATE_EXTERN;
5484 DirectiveKindMap[".reference"] = DK_REFERENCE;
5485 DirectiveKindMap[".weak_definition"] = DK_WEAK_DEFINITION;
5486 DirectiveKindMap[".weak_reference"] = DK_WEAK_REFERENCE;
5487 DirectiveKindMap[".weak_def_can_be_hidden"] = DK_WEAK_DEF_CAN_BE_HIDDEN;
5488 DirectiveKindMap[".cold"] = DK_COLD;
5489 DirectiveKindMap[".comm"] = DK_COMM;
5490 DirectiveKindMap[".common"] = DK_COMMON;
5491 DirectiveKindMap[".lcomm"] = DK_LCOMM;
5492 DirectiveKindMap[".abort"] = DK_ABORT;
5493 DirectiveKindMap[".include"] = DK_INCLUDE;
5494 DirectiveKindMap[".incbin"] = DK_INCBIN;
5495 DirectiveKindMap[".code16"] = DK_CODE16;
5496 DirectiveKindMap[".code16gcc"] = DK_CODE16GCC;
5497 DirectiveKindMap[".rept"] = DK_REPT;
5498 DirectiveKindMap[".rep"] = DK_REPT;
5499 DirectiveKindMap[".irp"] = DK_IRP;
5500 DirectiveKindMap[".irpc"] = DK_IRPC;
5501 DirectiveKindMap[".endr"] = DK_ENDR;
5502 DirectiveKindMap[".bundle_align_mode"] = DK_BUNDLE_ALIGN_MODE;
5503 DirectiveKindMap[".bundle_lock"] = DK_BUNDLE_LOCK;
5504 DirectiveKindMap[".bundle_unlock"] = DK_BUNDLE_UNLOCK;
5505 DirectiveKindMap[".if"] = DK_IF;
5506 DirectiveKindMap[".ifeq"] = DK_IFEQ;
5507 DirectiveKindMap[".ifge"] = DK_IFGE;
5508 DirectiveKindMap[".ifgt"] = DK_IFGT;
5509 DirectiveKindMap[".ifle"] = DK_IFLE;
5510 DirectiveKindMap[".iflt"] = DK_IFLT;
5511 DirectiveKindMap[".ifne"] = DK_IFNE;
5512 DirectiveKindMap[".ifb"] = DK_IFB;
5513 DirectiveKindMap[".ifnb"] = DK_IFNB;
5514 DirectiveKindMap[".ifc"] = DK_IFC;
5515 DirectiveKindMap[".ifeqs"] = DK_IFEQS;
5516 DirectiveKindMap[".ifnc"] = DK_IFNC;
5517 DirectiveKindMap[".ifnes"] = DK_IFNES;
5518 DirectiveKindMap[".ifdef"] = DK_IFDEF;
5519 DirectiveKindMap[".ifndef"] = DK_IFNDEF;
5520 DirectiveKindMap[".ifnotdef"] = DK_IFNOTDEF;
5521 DirectiveKindMap[".elseif"] = DK_ELSEIF;
5522 DirectiveKindMap[".else"] = DK_ELSE;
5523 DirectiveKindMap[".end"] = DK_END;
5524 DirectiveKindMap[".endif"] = DK_ENDIF;
5525 DirectiveKindMap[".skip"] = DK_SKIP;
5526 DirectiveKindMap[".space"] = DK_SPACE;
5527 DirectiveKindMap[".file"] = DK_FILE;
5528 DirectiveKindMap[".line"] = DK_LINE;
5529 DirectiveKindMap[".loc"] = DK_LOC;
5530 DirectiveKindMap[".stabs"] = DK_STABS;
5531 DirectiveKindMap[".cv_file"] = DK_CV_FILE;
5532 DirectiveKindMap[".cv_func_id"] = DK_CV_FUNC_ID;
5533 DirectiveKindMap[".cv_loc"] = DK_CV_LOC;
5534 DirectiveKindMap[".cv_linetable"] = DK_CV_LINETABLE;
5535 DirectiveKindMap[".cv_inline_linetable"] = DK_CV_INLINE_LINETABLE;
5536 DirectiveKindMap[".cv_inline_site_id"] = DK_CV_INLINE_SITE_ID;
5537 DirectiveKindMap[".cv_def_range"] = DK_CV_DEF_RANGE;
5538 DirectiveKindMap[".cv_string"] = DK_CV_STRING;
5539 DirectiveKindMap[".cv_stringtable"] = DK_CV_STRINGTABLE;
5540 DirectiveKindMap[".cv_filechecksums"] = DK_CV_FILECHECKSUMS;
5541 DirectiveKindMap[".cv_filechecksumoffset"] = DK_CV_FILECHECKSUM_OFFSET;
5542 DirectiveKindMap[".cv_fpo_data"] = DK_CV_FPO_DATA;
5543 DirectiveKindMap[".sleb128"] = DK_SLEB128;
5544 DirectiveKindMap[".uleb128"] = DK_ULEB128;
5545 DirectiveKindMap[".cfi_sections"] = DK_CFI_SECTIONS;
5546 DirectiveKindMap[".cfi_startproc"] = DK_CFI_STARTPROC;
5547 DirectiveKindMap[".cfi_endproc"] = DK_CFI_ENDPROC;
5548 DirectiveKindMap[".cfi_def_cfa"] = DK_CFI_DEF_CFA;
5549 DirectiveKindMap[".cfi_def_cfa_offset"] = DK_CFI_DEF_CFA_OFFSET;
5550 DirectiveKindMap[".cfi_adjust_cfa_offset"] = DK_CFI_ADJUST_CFA_OFFSET;
5551 DirectiveKindMap[".cfi_def_cfa_register"] = DK_CFI_DEF_CFA_REGISTER;
5552 DirectiveKindMap[".cfi_llvm_def_aspace_cfa"] = DK_CFI_LLVM_DEF_ASPACE_CFA;
5553 DirectiveKindMap[".cfi_offset"] = DK_CFI_OFFSET;
5554 DirectiveKindMap[".cfi_rel_offset"] = DK_CFI_REL_OFFSET;
5555 DirectiveKindMap[".cfi_personality"] = DK_CFI_PERSONALITY;
5556 DirectiveKindMap[".cfi_lsda"] = DK_CFI_LSDA;
5557 DirectiveKindMap[".cfi_remember_state"] = DK_CFI_REMEMBER_STATE;
5558 DirectiveKindMap[".cfi_restore_state"] = DK_CFI_RESTORE_STATE;
5559 DirectiveKindMap[".cfi_same_value"] = DK_CFI_SAME_VALUE;
5560 DirectiveKindMap[".cfi_restore"] = DK_CFI_RESTORE;
5561 DirectiveKindMap[".cfi_escape"] = DK_CFI_ESCAPE;
5562 DirectiveKindMap[".cfi_return_column"] = DK_CFI_RETURN_COLUMN;
5563 DirectiveKindMap[".cfi_signal_frame"] = DK_CFI_SIGNAL_FRAME;
5564 DirectiveKindMap[".cfi_undefined"] = DK_CFI_UNDEFINED;
5565 DirectiveKindMap[".cfi_register"] = DK_CFI_REGISTER;
5566 DirectiveKindMap[".cfi_window_save"] = DK_CFI_WINDOW_SAVE;
5567 DirectiveKindMap[".cfi_b_key_frame"] = DK_CFI_B_KEY_FRAME;
5568 DirectiveKindMap[".macros_on"] = DK_MACROS_ON;
5569 DirectiveKindMap[".macros_off"] = DK_MACROS_OFF;
5570 DirectiveKindMap[".macro"] = DK_MACRO;
5571 DirectiveKindMap[".exitm"] = DK_EXITM;
5572 DirectiveKindMap[".endm"] = DK_ENDM;
5573 DirectiveKindMap[".endmacro"] = DK_ENDMACRO;
5574 DirectiveKindMap[".purgem"] = DK_PURGEM;
5575 DirectiveKindMap[".err"] = DK_ERR;
5576 DirectiveKindMap[".error"] = DK_ERROR;
5577 DirectiveKindMap[".warning"] = DK_WARNING;
5578 DirectiveKindMap[".altmacro"] = DK_ALTMACRO;
5579 DirectiveKindMap[".noaltmacro"] = DK_NOALTMACRO;
5580 DirectiveKindMap[".reloc"] = DK_RELOC;
5581 DirectiveKindMap[".dc"] = DK_DC;
5582 DirectiveKindMap[".dc.a"] = DK_DC_A;
5583 DirectiveKindMap[".dc.b"] = DK_DC_B;
5584 DirectiveKindMap[".dc.d"] = DK_DC_D;
5585 DirectiveKindMap[".dc.l"] = DK_DC_L;
5586 DirectiveKindMap[".dc.s"] = DK_DC_S;
5587 DirectiveKindMap[".dc.w"] = DK_DC_W;
5588 DirectiveKindMap[".dc.x"] = DK_DC_X;
5589 DirectiveKindMap[".dcb"] = DK_DCB;
5590 DirectiveKindMap[".dcb.b"] = DK_DCB_B;
5591 DirectiveKindMap[".dcb.d"] = DK_DCB_D;
5592 DirectiveKindMap[".dcb.l"] = DK_DCB_L;
5593 DirectiveKindMap[".dcb.s"] = DK_DCB_S;
5594 DirectiveKindMap[".dcb.w"] = DK_DCB_W;
5595 DirectiveKindMap[".dcb.x"] = DK_DCB_X;
5596 DirectiveKindMap[".ds"] = DK_DS;
5597 DirectiveKindMap[".ds.b"] = DK_DS_B;
5598 DirectiveKindMap[".ds.d"] = DK_DS_D;
5599 DirectiveKindMap[".ds.l"] = DK_DS_L;
5600 DirectiveKindMap[".ds.p"] = DK_DS_P;
5601 DirectiveKindMap[".ds.s"] = DK_DS_S;
5602 DirectiveKindMap[".ds.w"] = DK_DS_W;
5603 DirectiveKindMap[".ds.x"] = DK_DS_X;
5604 DirectiveKindMap[".print"] = DK_PRINT;
5605 DirectiveKindMap[".addrsig"] = DK_ADDRSIG;
5606 DirectiveKindMap[".addrsig_sym"] = DK_ADDRSIG_SYM;
5607 DirectiveKindMap[".pseudoprobe"] = DK_PSEUDO_PROBE;
5608 DirectiveKindMap[".lto_discard"] = DK_LTO_DISCARD;
5609 DirectiveKindMap[".lto_set_conditional"] = DK_LTO_SET_CONDITIONAL;
5610}
5611
5612MCAsmMacro *AsmParser::parseMacroLikeBody(SMLoc DirectiveLoc) {
5613 AsmToken EndToken, StartToken = getTok();
5614
5615 unsigned NestLevel = 0;
5616 while (true) {
5617 // Check whether we have reached the end of the file.
5618 if (getLexer().is(AsmToken::Eof)) {
5619 printError(DirectiveLoc, "no matching '.endr' in definition");
5620 return nullptr;
5621 }
5622
5623 if (Lexer.is(AsmToken::Identifier) &&
5624 (getTok().getIdentifier() == ".rep" ||
5625 getTok().getIdentifier() == ".rept" ||
5626 getTok().getIdentifier() == ".irp" ||
5627 getTok().getIdentifier() == ".irpc")) {
5628 ++NestLevel;
5629 }
5630
5631 // Otherwise, check whether we have reached the .endr.
5632 if (Lexer.is(AsmToken::Identifier) && getTok().getIdentifier() == ".endr") {
5633 if (NestLevel == 0) {
5634 EndToken = getTok();
5635 Lex();
5636 if (Lexer.isNot(AsmToken::EndOfStatement)) {
5637 printError(getTok().getLoc(),
5638 "unexpected token in '.endr' directive");
5639 return nullptr;
5640 }
5641 break;
5642 }
5643 --NestLevel;
5644 }
5645
5646 // Otherwise, scan till the end of the statement.
5647 eatToEndOfStatement();
5648 }
5649
5650 const char *BodyStart = StartToken.getLoc().getPointer();
5651 const char *BodyEnd = EndToken.getLoc().getPointer();
5652 StringRef Body = StringRef(BodyStart, BodyEnd - BodyStart);
5653
5654 // We Are Anonymous.
5655 MacroLikeBodies.emplace_back(StringRef(), Body, MCAsmMacroParameters());
5656 return &MacroLikeBodies.back();
5657}
5658
5659void AsmParser::instantiateMacroLikeBody(MCAsmMacro *M, SMLoc DirectiveLoc,
5660 raw_svector_ostream &OS) {
5661 OS << ".endr\n";
5662
5663 std::unique_ptr<MemoryBuffer> Instantiation =
5664 MemoryBuffer::getMemBufferCopy(OS.str(), "<instantiation>");
5665
5666 // Create the macro instantiation object and add to the current macro
5667 // instantiation stack.
5668 MacroInstantiation *MI = new MacroInstantiation{
5669 DirectiveLoc, CurBuffer, getTok().getLoc(), TheCondStack.size()};
5670 ActiveMacros.push_back(MI);
5671
5672 // Jump to the macro instantiation and prime the lexer.
5673 CurBuffer = SrcMgr.AddNewSourceBuffer(std::move(Instantiation), SMLoc());
5674 Lexer.setBuffer(SrcMgr.getMemoryBuffer(CurBuffer)->getBuffer());
5675 Lex();
5676}
5677
5678/// parseDirectiveRept
5679/// ::= .rep | .rept count
5680bool AsmParser::parseDirectiveRept(SMLoc DirectiveLoc, StringRef Dir) {
5681 const MCExpr *CountExpr;
5682 SMLoc CountLoc = getTok().getLoc();
5683 if (parseExpression(CountExpr))
5684 return true;
5685
5686 int64_t Count;
5687 if (!CountExpr->evaluateAsAbsolute(Count, getStreamer().getAssemblerPtr())) {
5688 return Error(CountLoc, "unexpected token in '" + Dir + "' directive");
5689 }
5690
5691 if (check(Count < 0, CountLoc, "Count is negative") || parseEOL())
5692 return true;
5693
5694 // Lex the rept 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 while (Count--) {
5704 // Note that the AtPseudoVariable is disabled for instantiations of .rep(t).
5705 if (expandMacro(OS, M->Body, None, None, false, getTok().getLoc()))
5706 return true;
5707 }
5708 instantiateMacroLikeBody(M, DirectiveLoc, OS);
5709
5710 return false;
5711}
5712
5713/// parseDirectiveIrp
5714/// ::= .irp symbol,values
5715bool AsmParser::parseDirectiveIrp(SMLoc DirectiveLoc) {
5716 MCAsmMacroParameter Parameter;
5717 MCAsmMacroArguments A;
5718 if (check(parseIdentifier(Parameter.Name),
5719 "expected identifier in '.irp' directive") ||
5720 parseComma() || parseMacroArguments(nullptr, A) || parseEOL())
5721 return true;
5722
5723 // Lex the irp definition.
5724 MCAsmMacro *M = parseMacroLikeBody(DirectiveLoc);
5725 if (!M)
5726 return true;
5727
5728 // Macro instantiation is lexical, unfortunately. We construct a new buffer
5729 // to hold the macro body with substitutions.
5730 SmallString<256> Buf;
5731 raw_svector_ostream OS(Buf);
5732
5733 for (const MCAsmMacroArgument &Arg : A) {
5734 // Note that the AtPseudoVariable is enabled for instantiations of .irp.
5735 // This is undocumented, but GAS seems to support it.
5736 if (expandMacro(OS, M->Body, Parameter, Arg, true, getTok().getLoc()))
5737 return true;
5738 }
5739
5740 instantiateMacroLikeBody(M, DirectiveLoc, OS);
5741
5742 return false;
5743}
5744
5745/// parseDirectiveIrpc
5746/// ::= .irpc symbol,values
5747bool AsmParser::parseDirectiveIrpc(SMLoc DirectiveLoc) {
5748 MCAsmMacroParameter Parameter;
5749 MCAsmMacroArguments A;
5750
5751 if (check(parseIdentifier(Parameter.Name),
5752 "expected identifier in '.irpc' directive") ||
5753 parseComma() || parseMacroArguments(nullptr, A))
5754 return true;
5755
5756 if (A.size() != 1 || A.front().size() != 1)
5757 return TokError("unexpected token in '.irpc' directive");
5758 if (parseEOL())
5759 return true;
5760
5761 // Lex the irpc definition.
5762 MCAsmMacro *M = parseMacroLikeBody(DirectiveLoc);
5763 if (!M)
5764 return true;
5765
5766 // Macro instantiation is lexical, unfortunately. We construct a new buffer
5767 // to hold the macro body with substitutions.
5768 SmallString<256> Buf;
5769 raw_svector_ostream OS(Buf);
5770
5771 StringRef Values = A.front().front().getString();
5772 for (std::size_t I = 0, End = Values.size(); I != End; ++I) {
5773 MCAsmMacroArgument Arg;
5774 Arg.emplace_back(AsmToken::Identifier, Values.slice(I, I + 1));
5775
5776 // Note that the AtPseudoVariable is enabled for instantiations of .irpc.
5777 // This is undocumented, but GAS seems to support it.
5778 if (expandMacro(OS, M->Body, Parameter, Arg, true, getTok().getLoc()))
5779 return true;
5780 }
5781
5782 instantiateMacroLikeBody(M, DirectiveLoc, OS);
5783
5784 return false;
5785}
5786
5787bool AsmParser::parseDirectiveEndr(SMLoc DirectiveLoc) {
5788 if (ActiveMacros.empty())
5789 return TokError("unmatched '.endr' directive");
5790
5791 // The only .repl that should get here are the ones created by
5792 // instantiateMacroLikeBody.
5793 assert(getLexer().is(AsmToken::EndOfStatement))(static_cast <bool> (getLexer().is(AsmToken::EndOfStatement
)) ? void (0) : __assert_fail ("getLexer().is(AsmToken::EndOfStatement)"
, "llvm/lib/MC/MCParser/AsmParser.cpp", 5793, __extension__ __PRETTY_FUNCTION__
))
;
5794
5795 handleMacroExit();
5796 return false;
5797}
5798
5799bool AsmParser::parseDirectiveMSEmit(SMLoc IDLoc, ParseStatementInfo &Info,
5800 size_t Len) {
5801 const MCExpr *Value;
5802 SMLoc ExprLoc = getLexer().getLoc();
5803 if (parseExpression(Value))
5804 return true;
5805 const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Value);
5806 if (!MCE)
5807 return Error(ExprLoc, "unexpected expression in _emit");
5808 uint64_t IntValue = MCE->getValue();
5809 if (!isUInt<8>(IntValue) && !isInt<8>(IntValue))
5810 return Error(ExprLoc, "literal value out of range for directive");
5811
5812 Info.AsmRewrites->emplace_back(AOK_Emit, IDLoc, Len);
5813 return false;
5814}
5815
5816bool AsmParser::parseDirectiveMSAlign(SMLoc IDLoc, ParseStatementInfo &Info) {
5817 const MCExpr *Value;
5818 SMLoc ExprLoc = getLexer().getLoc();
5819 if (parseExpression(Value))
5820 return true;
5821 const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Value);
5822 if (!MCE)
5823 return Error(ExprLoc, "unexpected expression in align");
5824 uint64_t IntValue = MCE->getValue();
5825 if (!isPowerOf2_64(IntValue))
5826 return Error(ExprLoc, "literal value not a power of two greater then zero");
5827
5828 Info.AsmRewrites->emplace_back(AOK_Align, IDLoc, 5, Log2_64(IntValue));
5829 return false;
5830}
5831
5832bool AsmParser::parseDirectivePrint(SMLoc DirectiveLoc) {
5833 const AsmToken StrTok = getTok();
5834 Lex();
5835 if (StrTok.isNot(AsmToken::String) || StrTok.getString().front() != '"')
5836 return Error(DirectiveLoc, "expected double quoted string after .print");
5837 if (parseEOL())
5838 return true;
5839 llvm::outs() << StrTok.getStringContents() << '\n';
5840 return false;
5841}
5842
5843bool AsmParser::parseDirectiveAddrsig() {
5844 if (parseEOL())
5845 return true;
5846 getStreamer().emitAddrsig();
5847 return false;
5848}
5849
5850bool AsmParser::parseDirectiveAddrsigSym() {
5851 StringRef Name;
5852 if (check(parseIdentifier(Name), "expected identifier") || parseEOL())
5853 return true;
5854 MCSymbol *Sym = getContext().getOrCreateSymbol(Name);
5855 getStreamer().emitAddrsigSym(Sym);
5856 return false;
5857}
5858
5859bool AsmParser::parseDirectivePseudoProbe() {
5860 int64_t Guid;
26
'Guid' declared without an initial value
5861 int64_t Index;
5862 int64_t Type;
5863 int64_t Attr;
5864
5865 if (getLexer().is(AsmToken::Integer)) {
27
Calling 'MCAsmLexer::is'
33
Returning from 'MCAsmLexer::is'
34
Taking false branch
5866 if (parseIntToken(Guid, "unexpected token in '.pseudoprobe' directive"))
5867 return true;
5868 }
5869
5870 if (getLexer().is(AsmToken::Integer)) {
35
Calling 'MCAsmLexer::is'
41
Returning from 'MCAsmLexer::is'
42
Taking false branch
5871 if (parseIntToken(Index, "unexpected token in '.pseudoprobe' directive"))
5872 return true;
5873 }
5874
5875 if (getLexer().is(AsmToken::Integer)) {
43
Calling 'MCAsmLexer::is'
49
Returning from 'MCAsmLexer::is'
50
Taking false branch
5876 if (parseIntToken(Type, "unexpected token in '.pseudoprobe' directive"))
5877 return true;
5878 }
5879
5880 if (getLexer().is(AsmToken::Integer)) {
51
Calling 'MCAsmLexer::is'
57
Returning from 'MCAsmLexer::is'
58
Taking false branch
5881 if (parseIntToken(Attr, "unexpected token in '.pseudoprobe' directive"))
5882 return true;
5883 }
5884
5885 // Parse inline stack like @ GUID:11:12 @ GUID:1:11 @ GUID:3:21
5886 MCPseudoProbeInlineStack InlineStack;
5887
5888 while (getLexer().is(AsmToken::At)) {
59
Calling 'MCAsmLexer::is'
65
Returning from 'MCAsmLexer::is'
66
Loop condition is false. Execution continues on line 5914
5889 // eat @
5890 Lex();
5891
5892 int64_t CallerGuid = 0;
5893 if (getLexer().is(AsmToken::Integer)) {
5894 if (parseIntToken(CallerGuid,
5895 "unexpected token in '.pseudoprobe' directive"))
5896 return true;
5897 }
5898
5899 // eat colon
5900 if (getLexer().is(AsmToken::Colon))
5901 Lex();
5902
5903 int64_t CallerProbeId = 0;
5904 if (getLexer().is(AsmToken::Integer)) {
5905 if (parseIntToken(CallerProbeId,
5906 "unexpected token in '.pseudoprobe' directive"))
5907 return true;
5908 }
5909
5910 InlineSite Site(CallerGuid, CallerProbeId);
5911 InlineStack.push_back(Site);
5912 }
5913
5914 if (parseEOL())
67
Assuming the condition is false
68
Taking false branch
5915 return true;
5916
5917 getStreamer().emitPseudoProbe(Guid, Index, Type, Attr, InlineStack);
69
1st function call argument is an uninitialized value
5918 return false;
5919}
5920
5921/// parseDirectiveLTODiscard
5922/// ::= ".lto_discard" [ identifier ( , identifier )* ]
5923/// The LTO library emits this directive to discard non-prevailing symbols.
5924/// We ignore symbol assignments and attribute changes for the specified
5925/// symbols.
5926bool AsmParser::parseDirectiveLTODiscard() {
5927 auto ParseOp = [&]() -> bool {
5928 StringRef Name;
5929 SMLoc Loc = getTok().getLoc();
5930 if (parseIdentifier(Name))
5931 return Error(Loc, "expected identifier");
5932 LTODiscardSymbols.insert(Name);
5933 return false;
5934 };
5935
5936 LTODiscardSymbols.clear();
5937 return parseMany(ParseOp);
5938}
5939
5940// We are comparing pointers, but the pointers are relative to a single string.
5941// Thus, this should always be deterministic.
5942static int rewritesSort(const AsmRewrite *AsmRewriteA,
5943 const AsmRewrite *AsmRewriteB) {
5944 if (AsmRewriteA->Loc.getPointer() < AsmRewriteB->Loc.getPointer())
5945 return -1;
5946 if (AsmRewriteB->Loc.getPointer() < AsmRewriteA->Loc.getPointer())
5947 return 1;
5948
5949 // It's possible to have a SizeDirective, Imm/ImmPrefix and an Input/Output
5950 // rewrite to the same location. Make sure the SizeDirective rewrite is
5951 // performed first, then the Imm/ImmPrefix and finally the Input/Output. This
5952 // ensures the sort algorithm is stable.
5953 if (AsmRewritePrecedence[AsmRewriteA->Kind] >
5954 AsmRewritePrecedence[AsmRewriteB->Kind])
5955 return -1;
5956
5957 if (AsmRewritePrecedence[AsmRewriteA->Kind] <
5958 AsmRewritePrecedence[AsmRewriteB->Kind])
5959 return 1;
5960 llvm_unreachable("Unstable rewrite sort.")::llvm::llvm_unreachable_internal("Unstable rewrite sort.", "llvm/lib/MC/MCParser/AsmParser.cpp"
, 5960)
;
5961}
5962
5963bool AsmParser::parseMSInlineAsm(
5964 std::string &AsmString, unsigned &NumOutputs, unsigned &NumInputs,
5965 SmallVectorImpl<std::pair<void *, bool>> &OpDecls,
5966 SmallVectorImpl<std::string> &Constraints,
5967 SmallVectorImpl<std::string> &Clobbers, const MCInstrInfo *MII,
5968 const MCInstPrinter *IP, MCAsmParserSemaCallback &SI) {
5969 SmallVector<void *, 4> InputDecls;
5970 SmallVector<void *, 4> OutputDecls;
5971 SmallVector<bool, 4> InputDeclsAddressOf;
5972 SmallVector<bool, 4> OutputDeclsAddressOf;
5973 SmallVector<std::string, 4> InputConstraints;
5974 SmallVector<std::string, 4> OutputConstraints;
5975 SmallVector<unsigned, 4> ClobberRegs;
5976
5977 SmallVector<AsmRewrite, 4> AsmStrRewrites;
5978
5979 // Prime the lexer.
5980 Lex();
5981
5982 // While we have input, parse each statement.
5983 unsigned InputIdx = 0;
5984 unsigned OutputIdx = 0;
5985 while (getLexer().isNot(AsmToken::Eof)) {
5986 // Parse curly braces marking block start/end
5987 if (parseCurlyBlockScope(AsmStrRewrites))
5988 continue;
5989
5990 ParseStatementInfo Info(&AsmStrRewrites);
5991 bool StatementErr = parseStatement(Info, &SI);
5992
5993 if (StatementErr || Info.ParseError) {
5994 // Emit pending errors if any exist.
5995 printPendingErrors();
5996 return true;
5997 }
5998
5999 // No pending error should exist here.
6000 assert(!hasPendingError() && "unexpected error from parseStatement")(static_cast <bool> (!hasPendingError() && "unexpected error from parseStatement"
) ? void (0) : __assert_fail ("!hasPendingError() && \"unexpected error from parseStatement\""
, "llvm/lib/MC/MCParser/AsmParser.cpp", 6000, __extension__ __PRETTY_FUNCTION__
))
;
6001
6002 if (Info.Opcode == ~0U)
6003 continue;
6004
6005 const MCInstrDesc &Desc = MII->get(Info.Opcode);
6006
6007 // Build the list of clobbers, outputs and inputs.
6008 for (unsigned i = 1, e = Info.ParsedOperands.size(); i != e; ++i) {
6009 MCParsedAsmOperand &Operand = *Info.ParsedOperands[i];
6010
6011 // Register operand.
6012 if (Operand.isReg() && !Operand.needAddressOf() &&
6013 !getTargetParser().OmitRegisterFromClobberLists(Operand.getReg())) {
6014 unsigned NumDefs = Desc.getNumDefs();
6015 // Clobber.
6016 if (NumDefs && Operand.getMCOperandNum() < NumDefs)
6017 ClobberRegs.push_back(Operand.getReg());
6018 continue;
6019 }
6020
6021 // Expr/Input or Output.
6022 StringRef SymName = Operand.getSymName();
6023 if (SymName.empty())
6024 continue;
6025
6026 void *OpDecl = Operand.getOpDecl();
6027 if (!OpDecl)
6028 continue;
6029
6030 StringRef Constraint = Operand.getConstraint();
6031 if (Operand.isImm()) {
6032 // Offset as immediate
6033 if (Operand.isOffsetOfLocal())
6034 Constraint = "r";
6035 else
6036 Constraint = "i";
6037 }
6038
6039 bool isOutput = (i == 1) && Desc.mayStore();
6040 SMLoc Start = SMLoc::getFromPointer(SymName.data());
6041 int64_t Size = Operand.isMemPlaceholder(Desc) ? 0 : SymName.size();
6042 if (isOutput) {
6043 ++InputIdx;
6044 OutputDecls.push_back(OpDecl);
6045 OutputDeclsAddressOf.push_back(Operand.needAddressOf());
6046 OutputConstraints.push_back(("=" + Constraint).str());
6047 AsmStrRewrites.emplace_back(AOK_Output, Start, Size);
6048 } else {
6049 InputDecls.push_back(OpDecl);
6050 InputDeclsAddressOf.push_back(Operand.needAddressOf());
6051 InputConstraints.push_back(Constraint.str());
6052 if (Desc.OpInfo[i - 1].isBranchTarget())
6053 AsmStrRewrites.emplace_back(AOK_CallInput, Start, SymName.size());
6054 else
6055 AsmStrRewrites.emplace_back(AOK_Input, Start, Size);
6056 }
6057 }
6058
6059 // Consider implicit defs to be clobbers. Think of cpuid and push.
6060 ArrayRef<MCPhysReg> ImpDefs(Desc.getImplicitDefs(),