File: | lib/MC/MCParser/AsmParser.cpp |
Warning: | line 3399, column 7 Value stored to 'FileNumber' is never read |
Press '?' to see keyboard shortcuts
Keyboard shortcuts:
1 | //===- AsmParser.cpp - Parser for Assembly Files --------------------------===// |
2 | // |
3 | // The LLVM Compiler Infrastructure |
4 | // |
5 | // This file is distributed under the University of Illinois Open Source |
6 | // License. See LICENSE.TXT for details. |
7 | // |
8 | //===----------------------------------------------------------------------===// |
9 | // |
10 | // This class implements the parser for assembly files. |
11 | // |
12 | //===----------------------------------------------------------------------===// |
13 | |
14 | #include "llvm/ADT/APFloat.h" |
15 | #include "llvm/ADT/APInt.h" |
16 | #include "llvm/ADT/ArrayRef.h" |
17 | #include "llvm/ADT/None.h" |
18 | #include "llvm/ADT/STLExtras.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/MC/MCAsmInfo.h" |
27 | #include "llvm/MC/MCCodeView.h" |
28 | #include "llvm/MC/MCContext.h" |
29 | #include "llvm/MC/MCDirectives.h" |
30 | #include "llvm/MC/MCDwarf.h" |
31 | #include "llvm/MC/MCExpr.h" |
32 | #include "llvm/MC/MCInstPrinter.h" |
33 | #include "llvm/MC/MCInstrDesc.h" |
34 | #include "llvm/MC/MCInstrInfo.h" |
35 | #include "llvm/MC/MCObjectFileInfo.h" |
36 | #include "llvm/MC/MCParser/AsmCond.h" |
37 | #include "llvm/MC/MCParser/AsmLexer.h" |
38 | #include "llvm/MC/MCParser/MCAsmLexer.h" |
39 | #include "llvm/MC/MCParser/MCAsmParser.h" |
40 | #include "llvm/MC/MCParser/MCAsmParserExtension.h" |
41 | #include "llvm/MC/MCParser/MCAsmParserUtils.h" |
42 | #include "llvm/MC/MCParser/MCParsedAsmOperand.h" |
43 | #include "llvm/MC/MCParser/MCTargetAsmParser.h" |
44 | #include "llvm/MC/MCRegisterInfo.h" |
45 | #include "llvm/MC/MCSection.h" |
46 | #include "llvm/MC/MCStreamer.h" |
47 | #include "llvm/MC/MCSymbol.h" |
48 | #include "llvm/MC/MCTargetOptions.h" |
49 | #include "llvm/MC/MCValue.h" |
50 | #include "llvm/Support/Casting.h" |
51 | #include "llvm/Support/CommandLine.h" |
52 | #include "llvm/Support/ErrorHandling.h" |
53 | #include "llvm/Support/MD5.h" |
54 | #include "llvm/Support/MathExtras.h" |
55 | #include "llvm/Support/MemoryBuffer.h" |
56 | #include "llvm/Support/SMLoc.h" |
57 | #include "llvm/Support/SourceMgr.h" |
58 | #include "llvm/Support/raw_ostream.h" |
59 | #include <algorithm> |
60 | #include <cassert> |
61 | #include <cctype> |
62 | #include <climits> |
63 | #include <cstddef> |
64 | #include <cstdint> |
65 | #include <deque> |
66 | #include <memory> |
67 | #include <sstream> |
68 | #include <string> |
69 | #include <tuple> |
70 | #include <utility> |
71 | #include <vector> |
72 | |
73 | using namespace llvm; |
74 | |
75 | MCAsmParserSemaCallback::~MCAsmParserSemaCallback() = default; |
76 | |
77 | static cl::opt<unsigned> AsmMacroMaxNestingDepth( |
78 | "asm-macro-max-nesting-depth", cl::init(20), cl::Hidden, |
79 | cl::desc("The maximum nesting depth allowed for assembly macros.")); |
80 | |
81 | namespace { |
82 | |
83 | /// Helper types for tracking macro definitions. |
84 | typedef std::vector<AsmToken> MCAsmMacroArgument; |
85 | typedef std::vector<MCAsmMacroArgument> MCAsmMacroArguments; |
86 | |
87 | /// Helper class for storing information about an active macro |
88 | /// instantiation. |
89 | struct MacroInstantiation { |
90 | /// The location of the instantiation. |
91 | SMLoc InstantiationLoc; |
92 | |
93 | /// The buffer where parsing should resume upon instantiation completion. |
94 | int ExitBuffer; |
95 | |
96 | /// The location where parsing should resume upon instantiation completion. |
97 | SMLoc ExitLoc; |
98 | |
99 | /// The depth of TheCondStack at the start of the instantiation. |
100 | size_t CondStackDepth; |
101 | |
102 | public: |
103 | MacroInstantiation(SMLoc IL, int EB, SMLoc EL, size_t CondStackDepth); |
104 | }; |
105 | |
106 | struct ParseStatementInfo { |
107 | /// The parsed operands from the last parsed statement. |
108 | SmallVector<std::unique_ptr<MCParsedAsmOperand>, 8> ParsedOperands; |
109 | |
110 | /// The opcode from the last parsed instruction. |
111 | unsigned Opcode = ~0U; |
112 | |
113 | /// Was there an error parsing the inline assembly? |
114 | bool ParseError = false; |
115 | |
116 | SmallVectorImpl<AsmRewrite> *AsmRewrites = nullptr; |
117 | |
118 | ParseStatementInfo() = delete; |
119 | ParseStatementInfo(SmallVectorImpl<AsmRewrite> *rewrites) |
120 | : AsmRewrites(rewrites) {} |
121 | }; |
122 | |
123 | /// The concrete assembly parser instance. |
124 | class AsmParser : public MCAsmParser { |
125 | private: |
126 | AsmLexer Lexer; |
127 | MCContext &Ctx; |
128 | MCStreamer &Out; |
129 | const MCAsmInfo &MAI; |
130 | SourceMgr &SrcMgr; |
131 | SourceMgr::DiagHandlerTy SavedDiagHandler; |
132 | void *SavedDiagContext; |
133 | std::unique_ptr<MCAsmParserExtension> PlatformParser; |
134 | |
135 | /// This is the current buffer index we're lexing from as managed by the |
136 | /// SourceMgr object. |
137 | unsigned CurBuffer; |
138 | |
139 | AsmCond TheCondState; |
140 | std::vector<AsmCond> TheCondStack; |
141 | |
142 | /// maps directive names to handler methods in parser |
143 | /// extensions. Extensions register themselves in this map by calling |
144 | /// addDirectiveHandler. |
145 | StringMap<ExtensionDirectiveHandler> ExtensionDirectiveMap; |
146 | |
147 | /// Stack of active macro instantiations. |
148 | std::vector<MacroInstantiation*> ActiveMacros; |
149 | |
150 | /// List of bodies of anonymous macros. |
151 | std::deque<MCAsmMacro> MacroLikeBodies; |
152 | |
153 | /// Boolean tracking whether macro substitution is enabled. |
154 | unsigned MacrosEnabledFlag : 1; |
155 | |
156 | /// Keeps track of how many .macro's have been instantiated. |
157 | unsigned NumOfMacroInstantiations; |
158 | |
159 | /// The values from the last parsed cpp hash file line comment if any. |
160 | struct CppHashInfoTy { |
161 | StringRef Filename; |
162 | int64_t LineNumber = 0; |
163 | SMLoc Loc; |
164 | unsigned Buf = 0; |
165 | }; |
166 | CppHashInfoTy CppHashInfo; |
167 | |
168 | /// List of forward directional labels for diagnosis at the end. |
169 | SmallVector<std::tuple<SMLoc, CppHashInfoTy, MCSymbol *>, 4> DirLabels; |
170 | |
171 | /// AssemblerDialect. ~OU means unset value and use value provided by MAI. |
172 | unsigned AssemblerDialect = ~0U; |
173 | |
174 | /// is Darwin compatibility enabled? |
175 | bool IsDarwin = false; |
176 | |
177 | /// Are we parsing ms-style inline assembly? |
178 | bool ParsingInlineAsm = false; |
179 | |
180 | /// Did we already inform the user about inconsistent MD5 usage? |
181 | bool ReportedInconsistentMD5 = false; |
182 | |
183 | // Is alt macro mode enabled. |
184 | bool AltMacroMode = false; |
185 | |
186 | public: |
187 | AsmParser(SourceMgr &SM, MCContext &Ctx, MCStreamer &Out, |
188 | const MCAsmInfo &MAI, unsigned CB); |
189 | AsmParser(const AsmParser &) = delete; |
190 | AsmParser &operator=(const AsmParser &) = delete; |
191 | ~AsmParser() override; |
192 | |
193 | bool Run(bool NoInitialTextSection, bool NoFinalize = false) override; |
194 | |
195 | void addDirectiveHandler(StringRef Directive, |
196 | ExtensionDirectiveHandler Handler) override { |
197 | ExtensionDirectiveMap[Directive] = Handler; |
198 | } |
199 | |
200 | void addAliasForDirective(StringRef Directive, StringRef Alias) override { |
201 | DirectiveKindMap[Directive] = DirectiveKindMap[Alias]; |
202 | } |
203 | |
204 | /// @name MCAsmParser Interface |
205 | /// { |
206 | |
207 | SourceMgr &getSourceManager() override { return SrcMgr; } |
208 | MCAsmLexer &getLexer() override { return Lexer; } |
209 | MCContext &getContext() override { return Ctx; } |
210 | MCStreamer &getStreamer() override { return Out; } |
211 | |
212 | CodeViewContext &getCVContext() { return Ctx.getCVContext(); } |
213 | |
214 | unsigned getAssemblerDialect() override { |
215 | if (AssemblerDialect == ~0U) |
216 | return MAI.getAssemblerDialect(); |
217 | else |
218 | return AssemblerDialect; |
219 | } |
220 | void setAssemblerDialect(unsigned i) override { |
221 | AssemblerDialect = i; |
222 | } |
223 | |
224 | void Note(SMLoc L, const Twine &Msg, SMRange Range = None) override; |
225 | bool Warning(SMLoc L, const Twine &Msg, SMRange Range = None) override; |
226 | bool printError(SMLoc L, const Twine &Msg, SMRange Range = None) override; |
227 | |
228 | const AsmToken &Lex() override; |
229 | |
230 | void setParsingInlineAsm(bool V) override { |
231 | ParsingInlineAsm = V; |
232 | // When parsing MS inline asm, we must lex 0b1101 and 0ABCH as binary and |
233 | // hex integer literals. |
234 | Lexer.setLexMasmIntegers(V); |
235 | } |
236 | bool isParsingInlineAsm() override { return ParsingInlineAsm; } |
237 | |
238 | bool parseMSInlineAsm(void *AsmLoc, std::string &AsmString, |
239 | unsigned &NumOutputs, unsigned &NumInputs, |
240 | SmallVectorImpl<std::pair<void *,bool>> &OpDecls, |
241 | SmallVectorImpl<std::string> &Constraints, |
242 | SmallVectorImpl<std::string> &Clobbers, |
243 | const MCInstrInfo *MII, const MCInstPrinter *IP, |
244 | MCAsmParserSemaCallback &SI) override; |
245 | |
246 | bool parseExpression(const MCExpr *&Res); |
247 | bool parseExpression(const MCExpr *&Res, SMLoc &EndLoc) override; |
248 | bool parsePrimaryExpr(const MCExpr *&Res, SMLoc &EndLoc) override; |
249 | bool parseParenExpression(const MCExpr *&Res, SMLoc &EndLoc) override; |
250 | bool parseParenExprOfDepth(unsigned ParenDepth, const MCExpr *&Res, |
251 | SMLoc &EndLoc) override; |
252 | bool parseAbsoluteExpression(int64_t &Res) override; |
253 | |
254 | /// Parse a floating point expression using the float \p Semantics |
255 | /// and set \p Res to the value. |
256 | bool parseRealValue(const fltSemantics &Semantics, APInt &Res); |
257 | |
258 | /// Parse an identifier or string (as a quoted identifier) |
259 | /// and set \p Res to the identifier contents. |
260 | bool parseIdentifier(StringRef &Res) override; |
261 | void eatToEndOfStatement() override; |
262 | |
263 | bool checkForValidSection() override; |
264 | |
265 | /// } |
266 | |
267 | private: |
268 | bool parseStatement(ParseStatementInfo &Info, |
269 | MCAsmParserSemaCallback *SI); |
270 | bool parseCurlyBlockScope(SmallVectorImpl<AsmRewrite>& AsmStrRewrites); |
271 | bool parseCppHashLineFilenameComment(SMLoc L); |
272 | |
273 | void checkForBadMacro(SMLoc DirectiveLoc, StringRef Name, StringRef Body, |
274 | ArrayRef<MCAsmMacroParameter> Parameters); |
275 | bool expandMacro(raw_svector_ostream &OS, StringRef Body, |
276 | ArrayRef<MCAsmMacroParameter> Parameters, |
277 | ArrayRef<MCAsmMacroArgument> A, bool EnableAtPseudoVariable, |
278 | SMLoc L); |
279 | |
280 | /// Are macros enabled in the parser? |
281 | bool areMacrosEnabled() {return MacrosEnabledFlag;} |
282 | |
283 | /// Control a flag in the parser that enables or disables macros. |
284 | void setMacrosEnabled(bool Flag) {MacrosEnabledFlag = Flag;} |
285 | |
286 | /// Are we inside a macro instantiation? |
287 | bool isInsideMacroInstantiation() {return !ActiveMacros.empty();} |
288 | |
289 | /// Handle entry to macro instantiation. |
290 | /// |
291 | /// \param M The macro. |
292 | /// \param NameLoc Instantiation location. |
293 | bool handleMacroEntry(const MCAsmMacro *M, SMLoc NameLoc); |
294 | |
295 | /// Handle exit from macro instantiation. |
296 | void handleMacroExit(); |
297 | |
298 | /// Extract AsmTokens for a macro argument. |
299 | bool parseMacroArgument(MCAsmMacroArgument &MA, bool Vararg); |
300 | |
301 | /// Parse all macro arguments for a given macro. |
302 | bool parseMacroArguments(const MCAsmMacro *M, MCAsmMacroArguments &A); |
303 | |
304 | void printMacroInstantiations(); |
305 | void printMessage(SMLoc Loc, SourceMgr::DiagKind Kind, const Twine &Msg, |
306 | SMRange Range = None) const { |
307 | ArrayRef<SMRange> Ranges(Range); |
308 | SrcMgr.PrintMessage(Loc, Kind, Msg, Ranges); |
309 | } |
310 | static void DiagHandler(const SMDiagnostic &Diag, void *Context); |
311 | |
312 | /// Should we emit DWARF describing this assembler source? (Returns false if |
313 | /// the source has .file directives, which means we don't want to generate |
314 | /// info describing the assembler source itself.) |
315 | bool enabledGenDwarfForAssembly(); |
316 | |
317 | /// Enter the specified file. This returns true on failure. |
318 | bool enterIncludeFile(const std::string &Filename); |
319 | |
320 | /// Process the specified file for the .incbin directive. |
321 | /// This returns true on failure. |
322 | bool processIncbinFile(const std::string &Filename, int64_t Skip = 0, |
323 | const MCExpr *Count = nullptr, SMLoc Loc = SMLoc()); |
324 | |
325 | /// Reset the current lexer position to that given by \p Loc. The |
326 | /// current token is not set; clients should ensure Lex() is called |
327 | /// subsequently. |
328 | /// |
329 | /// \param InBuffer If not 0, should be the known buffer id that contains the |
330 | /// location. |
331 | void jumpToLoc(SMLoc Loc, unsigned InBuffer = 0); |
332 | |
333 | /// Parse up to the end of statement and a return the contents from the |
334 | /// current token until the end of the statement; the current token on exit |
335 | /// will be either the EndOfStatement or EOF. |
336 | StringRef parseStringToEndOfStatement() override; |
337 | |
338 | /// Parse until the end of a statement or a comma is encountered, |
339 | /// return the contents from the current token up to the end or comma. |
340 | StringRef parseStringToComma(); |
341 | |
342 | bool parseAssignment(StringRef Name, bool allow_redef, |
343 | bool NoDeadStrip = false); |
344 | |
345 | unsigned getBinOpPrecedence(AsmToken::TokenKind K, |
346 | MCBinaryExpr::Opcode &Kind); |
347 | |
348 | bool parseBinOpRHS(unsigned Precedence, const MCExpr *&Res, SMLoc &EndLoc); |
349 | bool parseParenExpr(const MCExpr *&Res, SMLoc &EndLoc); |
350 | bool parseBracketExpr(const MCExpr *&Res, SMLoc &EndLoc); |
351 | |
352 | bool parseRegisterOrRegisterNumber(int64_t &Register, SMLoc DirectiveLoc); |
353 | |
354 | bool parseCVFunctionId(int64_t &FunctionId, StringRef DirectiveName); |
355 | bool parseCVFileId(int64_t &FileId, StringRef DirectiveName); |
356 | |
357 | // Generic (target and platform independent) directive parsing. |
358 | enum DirectiveKind { |
359 | DK_NO_DIRECTIVE, // Placeholder |
360 | DK_SET, |
361 | DK_EQU, |
362 | DK_EQUIV, |
363 | DK_ASCII, |
364 | DK_ASCIZ, |
365 | DK_STRING, |
366 | DK_BYTE, |
367 | DK_SHORT, |
368 | DK_RELOC, |
369 | DK_VALUE, |
370 | DK_2BYTE, |
371 | DK_LONG, |
372 | DK_INT, |
373 | DK_4BYTE, |
374 | DK_QUAD, |
375 | DK_8BYTE, |
376 | DK_OCTA, |
377 | DK_DC, |
378 | DK_DC_A, |
379 | DK_DC_B, |
380 | DK_DC_D, |
381 | DK_DC_L, |
382 | DK_DC_S, |
383 | DK_DC_W, |
384 | DK_DC_X, |
385 | DK_DCB, |
386 | DK_DCB_B, |
387 | DK_DCB_D, |
388 | DK_DCB_L, |
389 | DK_DCB_S, |
390 | DK_DCB_W, |
391 | DK_DCB_X, |
392 | DK_DS, |
393 | DK_DS_B, |
394 | DK_DS_D, |
395 | DK_DS_L, |
396 | DK_DS_P, |
397 | DK_DS_S, |
398 | DK_DS_W, |
399 | DK_DS_X, |
400 | DK_SINGLE, |
401 | DK_FLOAT, |
402 | DK_DOUBLE, |
403 | DK_ALIGN, |
404 | DK_ALIGN32, |
405 | DK_BALIGN, |
406 | DK_BALIGNW, |
407 | DK_BALIGNL, |
408 | DK_P2ALIGN, |
409 | DK_P2ALIGNW, |
410 | DK_P2ALIGNL, |
411 | DK_ORG, |
412 | DK_FILL, |
413 | DK_ENDR, |
414 | DK_BUNDLE_ALIGN_MODE, |
415 | DK_BUNDLE_LOCK, |
416 | DK_BUNDLE_UNLOCK, |
417 | DK_ZERO, |
418 | DK_EXTERN, |
419 | DK_GLOBL, |
420 | DK_GLOBAL, |
421 | DK_LAZY_REFERENCE, |
422 | DK_NO_DEAD_STRIP, |
423 | DK_SYMBOL_RESOLVER, |
424 | DK_PRIVATE_EXTERN, |
425 | DK_REFERENCE, |
426 | DK_WEAK_DEFINITION, |
427 | DK_WEAK_REFERENCE, |
428 | DK_WEAK_DEF_CAN_BE_HIDDEN, |
429 | DK_COMM, |
430 | DK_COMMON, |
431 | DK_LCOMM, |
432 | DK_ABORT, |
433 | DK_INCLUDE, |
434 | DK_INCBIN, |
435 | DK_CODE16, |
436 | DK_CODE16GCC, |
437 | DK_REPT, |
438 | DK_IRP, |
439 | DK_IRPC, |
440 | DK_IF, |
441 | DK_IFEQ, |
442 | DK_IFGE, |
443 | DK_IFGT, |
444 | DK_IFLE, |
445 | DK_IFLT, |
446 | DK_IFNE, |
447 | DK_IFB, |
448 | DK_IFNB, |
449 | DK_IFC, |
450 | DK_IFEQS, |
451 | DK_IFNC, |
452 | DK_IFNES, |
453 | DK_IFDEF, |
454 | DK_IFNDEF, |
455 | DK_IFNOTDEF, |
456 | DK_ELSEIF, |
457 | DK_ELSE, |
458 | DK_ENDIF, |
459 | DK_SPACE, |
460 | DK_SKIP, |
461 | DK_FILE, |
462 | DK_LINE, |
463 | DK_LOC, |
464 | DK_STABS, |
465 | DK_CV_FILE, |
466 | DK_CV_FUNC_ID, |
467 | DK_CV_INLINE_SITE_ID, |
468 | DK_CV_LOC, |
469 | DK_CV_LINETABLE, |
470 | DK_CV_INLINE_LINETABLE, |
471 | DK_CV_DEF_RANGE, |
472 | DK_CV_STRINGTABLE, |
473 | DK_CV_STRING, |
474 | DK_CV_FILECHECKSUMS, |
475 | DK_CV_FILECHECKSUM_OFFSET, |
476 | DK_CV_FPO_DATA, |
477 | DK_CFI_SECTIONS, |
478 | DK_CFI_STARTPROC, |
479 | DK_CFI_ENDPROC, |
480 | DK_CFI_DEF_CFA, |
481 | DK_CFI_DEF_CFA_OFFSET, |
482 | DK_CFI_ADJUST_CFA_OFFSET, |
483 | DK_CFI_DEF_CFA_REGISTER, |
484 | DK_CFI_OFFSET, |
485 | DK_CFI_REL_OFFSET, |
486 | DK_CFI_PERSONALITY, |
487 | DK_CFI_LSDA, |
488 | DK_CFI_REMEMBER_STATE, |
489 | DK_CFI_RESTORE_STATE, |
490 | DK_CFI_SAME_VALUE, |
491 | DK_CFI_RESTORE, |
492 | DK_CFI_ESCAPE, |
493 | DK_CFI_RETURN_COLUMN, |
494 | DK_CFI_SIGNAL_FRAME, |
495 | DK_CFI_UNDEFINED, |
496 | DK_CFI_REGISTER, |
497 | DK_CFI_WINDOW_SAVE, |
498 | DK_CFI_B_KEY_FRAME, |
499 | DK_MACROS_ON, |
500 | DK_MACROS_OFF, |
501 | DK_ALTMACRO, |
502 | DK_NOALTMACRO, |
503 | DK_MACRO, |
504 | DK_EXITM, |
505 | DK_ENDM, |
506 | DK_ENDMACRO, |
507 | DK_PURGEM, |
508 | DK_SLEB128, |
509 | DK_ULEB128, |
510 | DK_ERR, |
511 | DK_ERROR, |
512 | DK_WARNING, |
513 | DK_PRINT, |
514 | DK_ADDRSIG, |
515 | DK_ADDRSIG_SYM, |
516 | DK_END |
517 | }; |
518 | |
519 | /// Maps directive name --> DirectiveKind enum, for |
520 | /// directives parsed by this class. |
521 | StringMap<DirectiveKind> DirectiveKindMap; |
522 | |
523 | // ".ascii", ".asciz", ".string" |
524 | bool parseDirectiveAscii(StringRef IDVal, bool ZeroTerminated); |
525 | bool parseDirectiveReloc(SMLoc DirectiveLoc); // ".reloc" |
526 | bool parseDirectiveValue(StringRef IDVal, |
527 | unsigned Size); // ".byte", ".long", ... |
528 | bool parseDirectiveOctaValue(StringRef IDVal); // ".octa", ... |
529 | bool parseDirectiveRealValue(StringRef IDVal, |
530 | const fltSemantics &); // ".single", ... |
531 | bool parseDirectiveFill(); // ".fill" |
532 | bool parseDirectiveZero(); // ".zero" |
533 | // ".set", ".equ", ".equiv" |
534 | bool parseDirectiveSet(StringRef IDVal, bool allow_redef); |
535 | bool parseDirectiveOrg(); // ".org" |
536 | // ".align{,32}", ".p2align{,w,l}" |
537 | bool parseDirectiveAlign(bool IsPow2, unsigned ValueSize); |
538 | |
539 | // ".file", ".line", ".loc", ".stabs" |
540 | bool parseDirectiveFile(SMLoc DirectiveLoc); |
541 | bool parseDirectiveLine(); |
542 | bool parseDirectiveLoc(); |
543 | bool parseDirectiveStabs(); |
544 | |
545 | // ".cv_file", ".cv_func_id", ".cv_inline_site_id", ".cv_loc", ".cv_linetable", |
546 | // ".cv_inline_linetable", ".cv_def_range", ".cv_string" |
547 | bool parseDirectiveCVFile(); |
548 | bool parseDirectiveCVFuncId(); |
549 | bool parseDirectiveCVInlineSiteId(); |
550 | bool parseDirectiveCVLoc(); |
551 | bool parseDirectiveCVLinetable(); |
552 | bool parseDirectiveCVInlineLinetable(); |
553 | bool parseDirectiveCVDefRange(); |
554 | bool parseDirectiveCVString(); |
555 | bool parseDirectiveCVStringTable(); |
556 | bool parseDirectiveCVFileChecksums(); |
557 | bool parseDirectiveCVFileChecksumOffset(); |
558 | bool parseDirectiveCVFPOData(); |
559 | |
560 | // .cfi directives |
561 | bool parseDirectiveCFIRegister(SMLoc DirectiveLoc); |
562 | bool parseDirectiveCFIWindowSave(); |
563 | bool parseDirectiveCFISections(); |
564 | bool parseDirectiveCFIStartProc(); |
565 | bool parseDirectiveCFIEndProc(); |
566 | bool parseDirectiveCFIDefCfaOffset(); |
567 | bool parseDirectiveCFIDefCfa(SMLoc DirectiveLoc); |
568 | bool parseDirectiveCFIAdjustCfaOffset(); |
569 | bool parseDirectiveCFIDefCfaRegister(SMLoc DirectiveLoc); |
570 | bool parseDirectiveCFIOffset(SMLoc DirectiveLoc); |
571 | bool parseDirectiveCFIRelOffset(SMLoc DirectiveLoc); |
572 | bool parseDirectiveCFIPersonalityOrLsda(bool IsPersonality); |
573 | bool parseDirectiveCFIRememberState(); |
574 | bool parseDirectiveCFIRestoreState(); |
575 | bool parseDirectiveCFISameValue(SMLoc DirectiveLoc); |
576 | bool parseDirectiveCFIRestore(SMLoc DirectiveLoc); |
577 | bool parseDirectiveCFIEscape(); |
578 | bool parseDirectiveCFIReturnColumn(SMLoc DirectiveLoc); |
579 | bool parseDirectiveCFISignalFrame(); |
580 | bool parseDirectiveCFIUndefined(SMLoc DirectiveLoc); |
581 | |
582 | // macro directives |
583 | bool parseDirectivePurgeMacro(SMLoc DirectiveLoc); |
584 | bool parseDirectiveExitMacro(StringRef Directive); |
585 | bool parseDirectiveEndMacro(StringRef Directive); |
586 | bool parseDirectiveMacro(SMLoc DirectiveLoc); |
587 | bool parseDirectiveMacrosOnOff(StringRef Directive); |
588 | // alternate macro mode directives |
589 | bool parseDirectiveAltmacro(StringRef Directive); |
590 | // ".bundle_align_mode" |
591 | bool parseDirectiveBundleAlignMode(); |
592 | // ".bundle_lock" |
593 | bool parseDirectiveBundleLock(); |
594 | // ".bundle_unlock" |
595 | bool parseDirectiveBundleUnlock(); |
596 | |
597 | // ".space", ".skip" |
598 | bool parseDirectiveSpace(StringRef IDVal); |
599 | |
600 | // ".dcb" |
601 | bool parseDirectiveDCB(StringRef IDVal, unsigned Size); |
602 | bool parseDirectiveRealDCB(StringRef IDVal, const fltSemantics &); |
603 | // ".ds" |
604 | bool parseDirectiveDS(StringRef IDVal, unsigned Size); |
605 | |
606 | // .sleb128 (Signed=true) and .uleb128 (Signed=false) |
607 | bool parseDirectiveLEB128(bool Signed); |
608 | |
609 | /// Parse a directive like ".globl" which |
610 | /// accepts a single symbol (which should be a label or an external). |
611 | bool parseDirectiveSymbolAttribute(MCSymbolAttr Attr); |
612 | |
613 | bool parseDirectiveComm(bool IsLocal); // ".comm" and ".lcomm" |
614 | |
615 | bool parseDirectiveAbort(); // ".abort" |
616 | bool parseDirectiveInclude(); // ".include" |
617 | bool parseDirectiveIncbin(); // ".incbin" |
618 | |
619 | // ".if", ".ifeq", ".ifge", ".ifgt" , ".ifle", ".iflt" or ".ifne" |
620 | bool parseDirectiveIf(SMLoc DirectiveLoc, DirectiveKind DirKind); |
621 | // ".ifb" or ".ifnb", depending on ExpectBlank. |
622 | bool parseDirectiveIfb(SMLoc DirectiveLoc, bool ExpectBlank); |
623 | // ".ifc" or ".ifnc", depending on ExpectEqual. |
624 | bool parseDirectiveIfc(SMLoc DirectiveLoc, bool ExpectEqual); |
625 | // ".ifeqs" or ".ifnes", depending on ExpectEqual. |
626 | bool parseDirectiveIfeqs(SMLoc DirectiveLoc, bool ExpectEqual); |
627 | // ".ifdef" or ".ifndef", depending on expect_defined |
628 | bool parseDirectiveIfdef(SMLoc DirectiveLoc, bool expect_defined); |
629 | bool parseDirectiveElseIf(SMLoc DirectiveLoc); // ".elseif" |
630 | bool parseDirectiveElse(SMLoc DirectiveLoc); // ".else" |
631 | bool parseDirectiveEndIf(SMLoc DirectiveLoc); // .endif |
632 | bool parseEscapedString(std::string &Data) override; |
633 | |
634 | const MCExpr *applyModifierToExpr(const MCExpr *E, |
635 | MCSymbolRefExpr::VariantKind Variant); |
636 | |
637 | // Macro-like directives |
638 | MCAsmMacro *parseMacroLikeBody(SMLoc DirectiveLoc); |
639 | void instantiateMacroLikeBody(MCAsmMacro *M, SMLoc DirectiveLoc, |
640 | raw_svector_ostream &OS); |
641 | bool parseDirectiveRept(SMLoc DirectiveLoc, StringRef Directive); |
642 | bool parseDirectiveIrp(SMLoc DirectiveLoc); // ".irp" |
643 | bool parseDirectiveIrpc(SMLoc DirectiveLoc); // ".irpc" |
644 | bool parseDirectiveEndr(SMLoc DirectiveLoc); // ".endr" |
645 | |
646 | // "_emit" or "__emit" |
647 | bool parseDirectiveMSEmit(SMLoc DirectiveLoc, ParseStatementInfo &Info, |
648 | size_t Len); |
649 | |
650 | // "align" |
651 | bool parseDirectiveMSAlign(SMLoc DirectiveLoc, ParseStatementInfo &Info); |
652 | |
653 | // "end" |
654 | bool parseDirectiveEnd(SMLoc DirectiveLoc); |
655 | |
656 | // ".err" or ".error" |
657 | bool parseDirectiveError(SMLoc DirectiveLoc, bool WithMessage); |
658 | |
659 | // ".warning" |
660 | bool parseDirectiveWarning(SMLoc DirectiveLoc); |
661 | |
662 | // .print <double-quotes-string> |
663 | bool parseDirectivePrint(SMLoc DirectiveLoc); |
664 | |
665 | // Directives to support address-significance tables. |
666 | bool parseDirectiveAddrsig(); |
667 | bool parseDirectiveAddrsigSym(); |
668 | |
669 | void initializeDirectiveKindMap(); |
670 | }; |
671 | |
672 | } // end anonymous namespace |
673 | |
674 | namespace llvm { |
675 | |
676 | extern MCAsmParserExtension *createDarwinAsmParser(); |
677 | extern MCAsmParserExtension *createELFAsmParser(); |
678 | extern MCAsmParserExtension *createCOFFAsmParser(); |
679 | extern MCAsmParserExtension *createWasmAsmParser(); |
680 | |
681 | } // end namespace llvm |
682 | |
683 | enum { DEFAULT_ADDRSPACE = 0 }; |
684 | |
685 | AsmParser::AsmParser(SourceMgr &SM, MCContext &Ctx, MCStreamer &Out, |
686 | const MCAsmInfo &MAI, unsigned CB = 0) |
687 | : Lexer(MAI), Ctx(Ctx), Out(Out), MAI(MAI), SrcMgr(SM), |
688 | CurBuffer(CB ? CB : SM.getMainFileID()), MacrosEnabledFlag(true) { |
689 | HadError = false; |
690 | // Save the old handler. |
691 | SavedDiagHandler = SrcMgr.getDiagHandler(); |
692 | SavedDiagContext = SrcMgr.getDiagContext(); |
693 | // Set our own handler which calls the saved handler. |
694 | SrcMgr.setDiagHandler(DiagHandler, this); |
695 | Lexer.setBuffer(SrcMgr.getMemoryBuffer(CurBuffer)->getBuffer()); |
696 | |
697 | // Initialize the platform / file format parser. |
698 | switch (Ctx.getObjectFileInfo()->getObjectFileType()) { |
699 | case MCObjectFileInfo::IsCOFF: |
700 | PlatformParser.reset(createCOFFAsmParser()); |
701 | break; |
702 | case MCObjectFileInfo::IsMachO: |
703 | PlatformParser.reset(createDarwinAsmParser()); |
704 | IsDarwin = true; |
705 | break; |
706 | case MCObjectFileInfo::IsELF: |
707 | PlatformParser.reset(createELFAsmParser()); |
708 | break; |
709 | case MCObjectFileInfo::IsWasm: |
710 | PlatformParser.reset(createWasmAsmParser()); |
711 | break; |
712 | } |
713 | |
714 | PlatformParser->Initialize(*this); |
715 | initializeDirectiveKindMap(); |
716 | |
717 | NumOfMacroInstantiations = 0; |
718 | } |
719 | |
720 | AsmParser::~AsmParser() { |
721 | assert((HadError || ActiveMacros.empty()) &&(((HadError || ActiveMacros.empty()) && "Unexpected active macro instantiation!" ) ? static_cast<void> (0) : __assert_fail ("(HadError || ActiveMacros.empty()) && \"Unexpected active macro instantiation!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/MC/MCParser/AsmParser.cpp" , 722, __PRETTY_FUNCTION__)) |
722 | "Unexpected active macro instantiation!")(((HadError || ActiveMacros.empty()) && "Unexpected active macro instantiation!" ) ? static_cast<void> (0) : __assert_fail ("(HadError || ActiveMacros.empty()) && \"Unexpected active macro instantiation!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/MC/MCParser/AsmParser.cpp" , 722, __PRETTY_FUNCTION__)); |
723 | |
724 | // Restore the saved diagnostics handler and context for use during |
725 | // finalization. |
726 | SrcMgr.setDiagHandler(SavedDiagHandler, SavedDiagContext); |
727 | } |
728 | |
729 | void AsmParser::printMacroInstantiations() { |
730 | // Print the active macro instantiation stack. |
731 | for (std::vector<MacroInstantiation *>::const_reverse_iterator |
732 | it = ActiveMacros.rbegin(), |
733 | ie = ActiveMacros.rend(); |
734 | it != ie; ++it) |
735 | printMessage((*it)->InstantiationLoc, SourceMgr::DK_Note, |
736 | "while in macro instantiation"); |
737 | } |
738 | |
739 | void AsmParser::Note(SMLoc L, const Twine &Msg, SMRange Range) { |
740 | printPendingErrors(); |
741 | printMessage(L, SourceMgr::DK_Note, Msg, Range); |
742 | printMacroInstantiations(); |
743 | } |
744 | |
745 | bool AsmParser::Warning(SMLoc L, const Twine &Msg, SMRange Range) { |
746 | if(getTargetParser().getTargetOptions().MCNoWarn) |
747 | return false; |
748 | if (getTargetParser().getTargetOptions().MCFatalWarnings) |
749 | return Error(L, Msg, Range); |
750 | printMessage(L, SourceMgr::DK_Warning, Msg, Range); |
751 | printMacroInstantiations(); |
752 | return false; |
753 | } |
754 | |
755 | bool AsmParser::printError(SMLoc L, const Twine &Msg, SMRange Range) { |
756 | HadError = true; |
757 | printMessage(L, SourceMgr::DK_Error, Msg, Range); |
758 | printMacroInstantiations(); |
759 | return true; |
760 | } |
761 | |
762 | bool AsmParser::enterIncludeFile(const std::string &Filename) { |
763 | std::string IncludedFile; |
764 | unsigned NewBuf = |
765 | SrcMgr.AddIncludeFile(Filename, Lexer.getLoc(), IncludedFile); |
766 | if (!NewBuf) |
767 | return true; |
768 | |
769 | CurBuffer = NewBuf; |
770 | Lexer.setBuffer(SrcMgr.getMemoryBuffer(CurBuffer)->getBuffer()); |
771 | return false; |
772 | } |
773 | |
774 | /// Process the specified .incbin file by searching for it in the include paths |
775 | /// then just emitting the byte contents of the file to the streamer. This |
776 | /// returns true on failure. |
777 | bool AsmParser::processIncbinFile(const std::string &Filename, int64_t Skip, |
778 | const MCExpr *Count, SMLoc Loc) { |
779 | std::string IncludedFile; |
780 | unsigned NewBuf = |
781 | SrcMgr.AddIncludeFile(Filename, Lexer.getLoc(), IncludedFile); |
782 | if (!NewBuf) |
783 | return true; |
784 | |
785 | // Pick up the bytes from the file and emit them. |
786 | StringRef Bytes = SrcMgr.getMemoryBuffer(NewBuf)->getBuffer(); |
787 | Bytes = Bytes.drop_front(Skip); |
788 | if (Count) { |
789 | int64_t Res; |
790 | if (!Count->evaluateAsAbsolute(Res, getStreamer().getAssemblerPtr())) |
791 | return Error(Loc, "expected absolute expression"); |
792 | if (Res < 0) |
793 | return Warning(Loc, "negative count has no effect"); |
794 | Bytes = Bytes.take_front(Res); |
795 | } |
796 | getStreamer().EmitBytes(Bytes); |
797 | return false; |
798 | } |
799 | |
800 | void AsmParser::jumpToLoc(SMLoc Loc, unsigned InBuffer) { |
801 | CurBuffer = InBuffer ? InBuffer : SrcMgr.FindBufferContainingLoc(Loc); |
802 | Lexer.setBuffer(SrcMgr.getMemoryBuffer(CurBuffer)->getBuffer(), |
803 | Loc.getPointer()); |
804 | } |
805 | |
806 | const AsmToken &AsmParser::Lex() { |
807 | if (Lexer.getTok().is(AsmToken::Error)) |
808 | Error(Lexer.getErrLoc(), Lexer.getErr()); |
809 | |
810 | // if it's a end of statement with a comment in it |
811 | if (getTok().is(AsmToken::EndOfStatement)) { |
812 | // if this is a line comment output it. |
813 | if (!getTok().getString().empty() && getTok().getString().front() != '\n' && |
814 | getTok().getString().front() != '\r' && MAI.preserveAsmComments()) |
815 | Out.addExplicitComment(Twine(getTok().getString())); |
816 | } |
817 | |
818 | const AsmToken *tok = &Lexer.Lex(); |
819 | |
820 | // Parse comments here to be deferred until end of next statement. |
821 | while (tok->is(AsmToken::Comment)) { |
822 | if (MAI.preserveAsmComments()) |
823 | Out.addExplicitComment(Twine(tok->getString())); |
824 | tok = &Lexer.Lex(); |
825 | } |
826 | |
827 | if (tok->is(AsmToken::Eof)) { |
828 | // If this is the end of an included file, pop the parent file off the |
829 | // include stack. |
830 | SMLoc ParentIncludeLoc = SrcMgr.getParentIncludeLoc(CurBuffer); |
831 | if (ParentIncludeLoc != SMLoc()) { |
832 | jumpToLoc(ParentIncludeLoc); |
833 | return Lex(); |
834 | } |
835 | } |
836 | |
837 | return *tok; |
838 | } |
839 | |
840 | bool AsmParser::enabledGenDwarfForAssembly() { |
841 | // Check whether the user specified -g. |
842 | if (!getContext().getGenDwarfForAssembly()) |
843 | return false; |
844 | // If we haven't encountered any .file directives (which would imply that |
845 | // the assembler source was produced with debug info already) then emit one |
846 | // describing the assembler source file itself. |
847 | if (getContext().getGenDwarfFileNumber() == 0) |
848 | getContext().setGenDwarfFileNumber(getStreamer().EmitDwarfFileDirective( |
849 | 0, StringRef(), getContext().getMainFileName())); |
850 | return true; |
851 | } |
852 | |
853 | bool AsmParser::Run(bool NoInitialTextSection, bool NoFinalize) { |
854 | // Create the initial section, if requested. |
855 | if (!NoInitialTextSection) |
856 | Out.InitSections(false); |
857 | |
858 | // Prime the lexer. |
859 | Lex(); |
860 | |
861 | HadError = false; |
862 | AsmCond StartingCondState = TheCondState; |
863 | SmallVector<AsmRewrite, 4> AsmStrRewrites; |
864 | |
865 | // If we are generating dwarf for assembly source files save the initial text |
866 | // section. (Don't use enabledGenDwarfForAssembly() here, as we aren't |
867 | // emitting any actual debug info yet and haven't had a chance to parse any |
868 | // embedded .file directives.) |
869 | if (getContext().getGenDwarfForAssembly()) { |
870 | MCSection *Sec = getStreamer().getCurrentSectionOnly(); |
871 | if (!Sec->getBeginSymbol()) { |
872 | MCSymbol *SectionStartSym = getContext().createTempSymbol(); |
873 | getStreamer().EmitLabel(SectionStartSym); |
874 | Sec->setBeginSymbol(SectionStartSym); |
875 | } |
876 | bool InsertResult = getContext().addGenDwarfSection(Sec); |
877 | assert(InsertResult && ".text section should not have debug info yet")((InsertResult && ".text section should not have debug info yet" ) ? static_cast<void> (0) : __assert_fail ("InsertResult && \".text section should not have debug info yet\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/MC/MCParser/AsmParser.cpp" , 877, __PRETTY_FUNCTION__)); |
878 | (void)InsertResult; |
879 | } |
880 | |
881 | // While we have input, parse each statement. |
882 | while (Lexer.isNot(AsmToken::Eof)) { |
883 | ParseStatementInfo Info(&AsmStrRewrites); |
884 | if (!parseStatement(Info, nullptr)) |
885 | continue; |
886 | |
887 | // If we have a Lexer Error we are on an Error Token. Load in Lexer Error |
888 | // for printing ErrMsg via Lex() only if no (presumably better) parser error |
889 | // exists. |
890 | if (!hasPendingError() && Lexer.getTok().is(AsmToken::Error)) { |
891 | Lex(); |
892 | } |
893 | |
894 | // parseStatement returned true so may need to emit an error. |
895 | printPendingErrors(); |
896 | |
897 | // Skipping to the next line if needed. |
898 | if (!getLexer().isAtStartOfStatement()) |
899 | eatToEndOfStatement(); |
900 | } |
901 | |
902 | // All errors should have been emitted. |
903 | assert(!hasPendingError() && "unexpected error from parseStatement")((!hasPendingError() && "unexpected error from parseStatement" ) ? static_cast<void> (0) : __assert_fail ("!hasPendingError() && \"unexpected error from parseStatement\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/MC/MCParser/AsmParser.cpp" , 903, __PRETTY_FUNCTION__)); |
904 | |
905 | getTargetParser().flushPendingInstructions(getStreamer()); |
906 | |
907 | if (TheCondState.TheCond != StartingCondState.TheCond || |
908 | TheCondState.Ignore != StartingCondState.Ignore) |
909 | printError(getTok().getLoc(), "unmatched .ifs or .elses"); |
910 | // Check to see there are no empty DwarfFile slots. |
911 | const auto &LineTables = getContext().getMCDwarfLineTables(); |
912 | if (!LineTables.empty()) { |
913 | unsigned Index = 0; |
914 | for (const auto &File : LineTables.begin()->second.getMCDwarfFiles()) { |
915 | if (File.Name.empty() && Index != 0) |
916 | printError(getTok().getLoc(), "unassigned file number: " + |
917 | Twine(Index) + |
918 | " for .file directives"); |
919 | ++Index; |
920 | } |
921 | } |
922 | |
923 | // Check to see that all assembler local symbols were actually defined. |
924 | // Targets that don't do subsections via symbols may not want this, though, |
925 | // so conservatively exclude them. Only do this if we're finalizing, though, |
926 | // as otherwise we won't necessarilly have seen everything yet. |
927 | if (!NoFinalize) { |
928 | if (MAI.hasSubsectionsViaSymbols()) { |
929 | for (const auto &TableEntry : getContext().getSymbols()) { |
930 | MCSymbol *Sym = TableEntry.getValue(); |
931 | // Variable symbols may not be marked as defined, so check those |
932 | // explicitly. If we know it's a variable, we have a definition for |
933 | // the purposes of this check. |
934 | if (Sym->isTemporary() && !Sym->isVariable() && !Sym->isDefined()) |
935 | // FIXME: We would really like to refer back to where the symbol was |
936 | // first referenced for a source location. We need to add something |
937 | // to track that. Currently, we just point to the end of the file. |
938 | printError(getTok().getLoc(), "assembler local symbol '" + |
939 | Sym->getName() + "' not defined"); |
940 | } |
941 | } |
942 | |
943 | // Temporary symbols like the ones for directional jumps don't go in the |
944 | // symbol table. They also need to be diagnosed in all (final) cases. |
945 | for (std::tuple<SMLoc, CppHashInfoTy, MCSymbol *> &LocSym : DirLabels) { |
946 | if (std::get<2>(LocSym)->isUndefined()) { |
947 | // Reset the state of any "# line file" directives we've seen to the |
948 | // context as it was at the diagnostic site. |
949 | CppHashInfo = std::get<1>(LocSym); |
950 | printError(std::get<0>(LocSym), "directional label undefined"); |
951 | } |
952 | } |
953 | } |
954 | |
955 | // Finalize the output stream if there are no errors and if the client wants |
956 | // us to. |
957 | if (!HadError && !NoFinalize) |
958 | Out.Finish(); |
959 | |
960 | return HadError || getContext().hadError(); |
961 | } |
962 | |
963 | bool AsmParser::checkForValidSection() { |
964 | if (!ParsingInlineAsm && !getStreamer().getCurrentSectionOnly()) { |
965 | Out.InitSections(false); |
966 | return Error(getTok().getLoc(), |
967 | "expected section directive before assembly directive"); |
968 | } |
969 | return false; |
970 | } |
971 | |
972 | /// Throw away the rest of the line for testing purposes. |
973 | void AsmParser::eatToEndOfStatement() { |
974 | while (Lexer.isNot(AsmToken::EndOfStatement) && Lexer.isNot(AsmToken::Eof)) |
975 | Lexer.Lex(); |
976 | |
977 | // Eat EOL. |
978 | if (Lexer.is(AsmToken::EndOfStatement)) |
979 | Lexer.Lex(); |
980 | } |
981 | |
982 | StringRef AsmParser::parseStringToEndOfStatement() { |
983 | const char *Start = getTok().getLoc().getPointer(); |
984 | |
985 | while (Lexer.isNot(AsmToken::EndOfStatement) && Lexer.isNot(AsmToken::Eof)) |
986 | Lexer.Lex(); |
987 | |
988 | const char *End = getTok().getLoc().getPointer(); |
989 | return StringRef(Start, End - Start); |
990 | } |
991 | |
992 | StringRef AsmParser::parseStringToComma() { |
993 | const char *Start = getTok().getLoc().getPointer(); |
994 | |
995 | while (Lexer.isNot(AsmToken::EndOfStatement) && |
996 | Lexer.isNot(AsmToken::Comma) && Lexer.isNot(AsmToken::Eof)) |
997 | Lexer.Lex(); |
998 | |
999 | const char *End = getTok().getLoc().getPointer(); |
1000 | return StringRef(Start, End - Start); |
1001 | } |
1002 | |
1003 | /// Parse a paren expression and return it. |
1004 | /// NOTE: This assumes the leading '(' has already been consumed. |
1005 | /// |
1006 | /// parenexpr ::= expr) |
1007 | /// |
1008 | bool AsmParser::parseParenExpr(const MCExpr *&Res, SMLoc &EndLoc) { |
1009 | if (parseExpression(Res)) |
1010 | return true; |
1011 | if (Lexer.isNot(AsmToken::RParen)) |
1012 | return TokError("expected ')' in parentheses expression"); |
1013 | EndLoc = Lexer.getTok().getEndLoc(); |
1014 | Lex(); |
1015 | return false; |
1016 | } |
1017 | |
1018 | /// Parse a bracket expression and return it. |
1019 | /// NOTE: This assumes the leading '[' has already been consumed. |
1020 | /// |
1021 | /// bracketexpr ::= expr] |
1022 | /// |
1023 | bool AsmParser::parseBracketExpr(const MCExpr *&Res, SMLoc &EndLoc) { |
1024 | if (parseExpression(Res)) |
1025 | return true; |
1026 | EndLoc = getTok().getEndLoc(); |
1027 | if (parseToken(AsmToken::RBrac, "expected ']' in brackets expression")) |
1028 | return true; |
1029 | return false; |
1030 | } |
1031 | |
1032 | /// Parse a primary expression and return it. |
1033 | /// primaryexpr ::= (parenexpr |
1034 | /// primaryexpr ::= symbol |
1035 | /// primaryexpr ::= number |
1036 | /// primaryexpr ::= '.' |
1037 | /// primaryexpr ::= ~,+,- primaryexpr |
1038 | bool AsmParser::parsePrimaryExpr(const MCExpr *&Res, SMLoc &EndLoc) { |
1039 | SMLoc FirstTokenLoc = getLexer().getLoc(); |
1040 | AsmToken::TokenKind FirstTokenKind = Lexer.getKind(); |
1041 | switch (FirstTokenKind) { |
1042 | default: |
1043 | return TokError("unknown token in expression"); |
1044 | // If we have an error assume that we've already handled it. |
1045 | case AsmToken::Error: |
1046 | return true; |
1047 | case AsmToken::Exclaim: |
1048 | Lex(); // Eat the operator. |
1049 | if (parsePrimaryExpr(Res, EndLoc)) |
1050 | return true; |
1051 | Res = MCUnaryExpr::createLNot(Res, getContext(), FirstTokenLoc); |
1052 | return false; |
1053 | case AsmToken::Dollar: |
1054 | case AsmToken::At: |
1055 | case AsmToken::String: |
1056 | case AsmToken::Identifier: { |
1057 | StringRef Identifier; |
1058 | if (parseIdentifier(Identifier)) { |
1059 | // We may have failed but $ may be a valid token. |
1060 | if (getTok().is(AsmToken::Dollar)) { |
1061 | if (Lexer.getMAI().getDollarIsPC()) { |
1062 | Lex(); |
1063 | // This is a '$' reference, which references the current PC. Emit a |
1064 | // temporary label to the streamer and refer to it. |
1065 | MCSymbol *Sym = Ctx.createTempSymbol(); |
1066 | Out.EmitLabel(Sym); |
1067 | Res = MCSymbolRefExpr::create(Sym, MCSymbolRefExpr::VK_None, |
1068 | getContext()); |
1069 | EndLoc = FirstTokenLoc; |
1070 | return false; |
1071 | } |
1072 | return Error(FirstTokenLoc, "invalid token in expression"); |
1073 | } |
1074 | } |
1075 | // Parse symbol variant |
1076 | std::pair<StringRef, StringRef> Split; |
1077 | if (!MAI.useParensForSymbolVariant()) { |
1078 | if (FirstTokenKind == AsmToken::String) { |
1079 | if (Lexer.is(AsmToken::At)) { |
1080 | Lex(); // eat @ |
1081 | SMLoc AtLoc = getLexer().getLoc(); |
1082 | StringRef VName; |
1083 | if (parseIdentifier(VName)) |
1084 | return Error(AtLoc, "expected symbol variant after '@'"); |
1085 | |
1086 | Split = std::make_pair(Identifier, VName); |
1087 | } |
1088 | } else { |
1089 | Split = Identifier.split('@'); |
1090 | } |
1091 | } else if (Lexer.is(AsmToken::LParen)) { |
1092 | Lex(); // eat '('. |
1093 | StringRef VName; |
1094 | parseIdentifier(VName); |
1095 | // eat ')'. |
1096 | if (parseToken(AsmToken::RParen, |
1097 | "unexpected token in variant, expected ')'")) |
1098 | return true; |
1099 | Split = std::make_pair(Identifier, VName); |
1100 | } |
1101 | |
1102 | EndLoc = SMLoc::getFromPointer(Identifier.end()); |
1103 | |
1104 | // This is a symbol reference. |
1105 | StringRef SymbolName = Identifier; |
1106 | if (SymbolName.empty()) |
1107 | return Error(getLexer().getLoc(), "expected a symbol reference"); |
1108 | |
1109 | MCSymbolRefExpr::VariantKind Variant = MCSymbolRefExpr::VK_None; |
1110 | |
1111 | // Lookup the symbol variant if used. |
1112 | if (!Split.second.empty()) { |
1113 | Variant = MCSymbolRefExpr::getVariantKindForName(Split.second); |
1114 | if (Variant != MCSymbolRefExpr::VK_Invalid) { |
1115 | SymbolName = Split.first; |
1116 | } else if (MAI.doesAllowAtInName() && !MAI.useParensForSymbolVariant()) { |
1117 | Variant = MCSymbolRefExpr::VK_None; |
1118 | } else { |
1119 | return Error(SMLoc::getFromPointer(Split.second.begin()), |
1120 | "invalid variant '" + Split.second + "'"); |
1121 | } |
1122 | } |
1123 | |
1124 | MCSymbol *Sym = getContext().getOrCreateSymbol(SymbolName); |
1125 | |
1126 | // If this is an absolute variable reference, substitute it now to preserve |
1127 | // semantics in the face of reassignment. |
1128 | if (Sym->isVariable()) { |
1129 | auto V = Sym->getVariableValue(/*SetUsed*/ false); |
1130 | bool DoInline = isa<MCConstantExpr>(V) && !Variant; |
1131 | if (auto TV = dyn_cast<MCTargetExpr>(V)) |
1132 | DoInline = TV->inlineAssignedExpr(); |
1133 | if (DoInline) { |
1134 | if (Variant) |
1135 | return Error(EndLoc, "unexpected modifier on variable reference"); |
1136 | Res = Sym->getVariableValue(/*SetUsed*/ false); |
1137 | return false; |
1138 | } |
1139 | } |
1140 | |
1141 | // Otherwise create a symbol ref. |
1142 | Res = MCSymbolRefExpr::create(Sym, Variant, getContext(), FirstTokenLoc); |
1143 | return false; |
1144 | } |
1145 | case AsmToken::BigNum: |
1146 | return TokError("literal value out of range for directive"); |
1147 | case AsmToken::Integer: { |
1148 | SMLoc Loc = getTok().getLoc(); |
1149 | int64_t IntVal = getTok().getIntVal(); |
1150 | Res = MCConstantExpr::create(IntVal, getContext()); |
1151 | EndLoc = Lexer.getTok().getEndLoc(); |
1152 | Lex(); // Eat token. |
1153 | // Look for 'b' or 'f' following an Integer as a directional label |
1154 | if (Lexer.getKind() == AsmToken::Identifier) { |
1155 | StringRef IDVal = getTok().getString(); |
1156 | // Lookup the symbol variant if used. |
1157 | std::pair<StringRef, StringRef> Split = IDVal.split('@'); |
1158 | MCSymbolRefExpr::VariantKind Variant = MCSymbolRefExpr::VK_None; |
1159 | if (Split.first.size() != IDVal.size()) { |
1160 | Variant = MCSymbolRefExpr::getVariantKindForName(Split.second); |
1161 | if (Variant == MCSymbolRefExpr::VK_Invalid) |
1162 | return TokError("invalid variant '" + Split.second + "'"); |
1163 | IDVal = Split.first; |
1164 | } |
1165 | if (IDVal == "f" || IDVal == "b") { |
1166 | MCSymbol *Sym = |
1167 | Ctx.getDirectionalLocalSymbol(IntVal, IDVal == "b"); |
1168 | Res = MCSymbolRefExpr::create(Sym, Variant, getContext()); |
1169 | if (IDVal == "b" && Sym->isUndefined()) |
1170 | return Error(Loc, "directional label undefined"); |
1171 | DirLabels.push_back(std::make_tuple(Loc, CppHashInfo, Sym)); |
1172 | EndLoc = Lexer.getTok().getEndLoc(); |
1173 | Lex(); // Eat identifier. |
1174 | } |
1175 | } |
1176 | return false; |
1177 | } |
1178 | case AsmToken::Real: { |
1179 | APFloat RealVal(APFloat::IEEEdouble(), getTok().getString()); |
1180 | uint64_t IntVal = RealVal.bitcastToAPInt().getZExtValue(); |
1181 | Res = MCConstantExpr::create(IntVal, getContext()); |
1182 | EndLoc = Lexer.getTok().getEndLoc(); |
1183 | Lex(); // Eat token. |
1184 | return false; |
1185 | } |
1186 | case AsmToken::Dot: { |
1187 | // This is a '.' reference, which references the current PC. Emit a |
1188 | // 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, getContext()); |
1192 | EndLoc = Lexer.getTok().getEndLoc(); |
1193 | Lex(); // Eat identifier. |
1194 | return false; |
1195 | } |
1196 | case AsmToken::LParen: |
1197 | Lex(); // Eat the '('. |
1198 | return parseParenExpr(Res, EndLoc); |
1199 | case AsmToken::LBrac: |
1200 | if (!PlatformParser->HasBracketExpressions()) |
1201 | return TokError("brackets expression not supported on this target"); |
1202 | Lex(); // Eat the '['. |
1203 | return parseBracketExpr(Res, EndLoc); |
1204 | case AsmToken::Minus: |
1205 | Lex(); // Eat the operator. |
1206 | if (parsePrimaryExpr(Res, EndLoc)) |
1207 | return true; |
1208 | Res = MCUnaryExpr::createMinus(Res, getContext(), FirstTokenLoc); |
1209 | return false; |
1210 | case AsmToken::Plus: |
1211 | Lex(); // Eat the operator. |
1212 | if (parsePrimaryExpr(Res, EndLoc)) |
1213 | return true; |
1214 | Res = MCUnaryExpr::createPlus(Res, getContext(), FirstTokenLoc); |
1215 | return false; |
1216 | case AsmToken::Tilde: |
1217 | Lex(); // Eat the operator. |
1218 | if (parsePrimaryExpr(Res, EndLoc)) |
1219 | return true; |
1220 | Res = MCUnaryExpr::createNot(Res, getContext(), FirstTokenLoc); |
1221 | return false; |
1222 | // MIPS unary expression operators. The lexer won't generate these tokens if |
1223 | // MCAsmInfo::HasMipsExpressions is false for the target. |
1224 | case AsmToken::PercentCall16: |
1225 | case AsmToken::PercentCall_Hi: |
1226 | case AsmToken::PercentCall_Lo: |
1227 | case AsmToken::PercentDtprel_Hi: |
1228 | case AsmToken::PercentDtprel_Lo: |
1229 | case AsmToken::PercentGot: |
1230 | case AsmToken::PercentGot_Disp: |
1231 | case AsmToken::PercentGot_Hi: |
1232 | case AsmToken::PercentGot_Lo: |
1233 | case AsmToken::PercentGot_Ofst: |
1234 | case AsmToken::PercentGot_Page: |
1235 | case AsmToken::PercentGottprel: |
1236 | case AsmToken::PercentGp_Rel: |
1237 | case AsmToken::PercentHi: |
1238 | case AsmToken::PercentHigher: |
1239 | case AsmToken::PercentHighest: |
1240 | case AsmToken::PercentLo: |
1241 | case AsmToken::PercentNeg: |
1242 | case AsmToken::PercentPcrel_Hi: |
1243 | case AsmToken::PercentPcrel_Lo: |
1244 | case AsmToken::PercentTlsgd: |
1245 | case AsmToken::PercentTlsldm: |
1246 | case AsmToken::PercentTprel_Hi: |
1247 | case AsmToken::PercentTprel_Lo: |
1248 | Lex(); // Eat the operator. |
1249 | if (Lexer.isNot(AsmToken::LParen)) |
1250 | return TokError("expected '(' after operator"); |
1251 | Lex(); // Eat the operator. |
1252 | if (parseExpression(Res, EndLoc)) |
1253 | return true; |
1254 | if (Lexer.isNot(AsmToken::RParen)) |
1255 | return TokError("expected ')'"); |
1256 | Lex(); // Eat the operator. |
1257 | Res = getTargetParser().createTargetUnaryExpr(Res, FirstTokenKind, Ctx); |
1258 | return !Res; |
1259 | } |
1260 | } |
1261 | |
1262 | bool AsmParser::parseExpression(const MCExpr *&Res) { |
1263 | SMLoc EndLoc; |
1264 | return parseExpression(Res, EndLoc); |
1265 | } |
1266 | |
1267 | const MCExpr * |
1268 | AsmParser::applyModifierToExpr(const MCExpr *E, |
1269 | MCSymbolRefExpr::VariantKind Variant) { |
1270 | // Ask the target implementation about this expression first. |
1271 | const MCExpr *NewE = getTargetParser().applyModifierToExpr(E, Variant, Ctx); |
1272 | if (NewE) |
1273 | return NewE; |
1274 | // Recurse over the given expression, rebuilding it to apply the given variant |
1275 | // if there is exactly one symbol. |
1276 | switch (E->getKind()) { |
1277 | case MCExpr::Target: |
1278 | case MCExpr::Constant: |
1279 | return nullptr; |
1280 | |
1281 | case MCExpr::SymbolRef: { |
1282 | const MCSymbolRefExpr *SRE = cast<MCSymbolRefExpr>(E); |
1283 | |
1284 | if (SRE->getKind() != MCSymbolRefExpr::VK_None) { |
1285 | TokError("invalid variant on expression '" + getTok().getIdentifier() + |
1286 | "' (already modified)"); |
1287 | return E; |
1288 | } |
1289 | |
1290 | return MCSymbolRefExpr::create(&SRE->getSymbol(), Variant, getContext()); |
1291 | } |
1292 | |
1293 | case MCExpr::Unary: { |
1294 | const MCUnaryExpr *UE = cast<MCUnaryExpr>(E); |
1295 | const MCExpr *Sub = applyModifierToExpr(UE->getSubExpr(), Variant); |
1296 | if (!Sub) |
1297 | return nullptr; |
1298 | return MCUnaryExpr::create(UE->getOpcode(), Sub, getContext()); |
1299 | } |
1300 | |
1301 | case MCExpr::Binary: { |
1302 | const MCBinaryExpr *BE = cast<MCBinaryExpr>(E); |
1303 | const MCExpr *LHS = applyModifierToExpr(BE->getLHS(), Variant); |
1304 | const MCExpr *RHS = applyModifierToExpr(BE->getRHS(), Variant); |
1305 | |
1306 | if (!LHS && !RHS) |
1307 | return nullptr; |
1308 | |
1309 | if (!LHS) |
1310 | LHS = BE->getLHS(); |
1311 | if (!RHS) |
1312 | RHS = BE->getRHS(); |
1313 | |
1314 | return MCBinaryExpr::create(BE->getOpcode(), LHS, RHS, getContext()); |
1315 | } |
1316 | } |
1317 | |
1318 | llvm_unreachable("Invalid expression kind!")::llvm::llvm_unreachable_internal("Invalid expression kind!", "/build/llvm-toolchain-snapshot-8~svn350071/lib/MC/MCParser/AsmParser.cpp" , 1318); |
1319 | } |
1320 | |
1321 | /// This function checks if the next token is <string> type or arithmetic. |
1322 | /// string that begin with character '<' must end with character '>'. |
1323 | /// otherwise it is arithmetics. |
1324 | /// If the function returns a 'true' value, |
1325 | /// the End argument will be filled with the last location pointed to the '>' |
1326 | /// character. |
1327 | |
1328 | /// There is a gap between the AltMacro's documentation and the single quote |
1329 | /// implementation. GCC does not fully support this feature and so we will not |
1330 | /// support it. |
1331 | /// TODO: Adding single quote as a string. |
1332 | static bool isAltmacroString(SMLoc &StrLoc, SMLoc &EndLoc) { |
1333 | assert((StrLoc.getPointer() != nullptr) &&(((StrLoc.getPointer() != nullptr) && "Argument to the function cannot be a NULL value" ) ? static_cast<void> (0) : __assert_fail ("(StrLoc.getPointer() != nullptr) && \"Argument to the function cannot be a NULL value\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/MC/MCParser/AsmParser.cpp" , 1334, __PRETTY_FUNCTION__)) |
1334 | "Argument to the function cannot be a NULL value")(((StrLoc.getPointer() != nullptr) && "Argument to the function cannot be a NULL value" ) ? static_cast<void> (0) : __assert_fail ("(StrLoc.getPointer() != nullptr) && \"Argument to the function cannot be a NULL value\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/MC/MCParser/AsmParser.cpp" , 1334, __PRETTY_FUNCTION__)); |
1335 | const char *CharPtr = StrLoc.getPointer(); |
1336 | while ((*CharPtr != '>') && (*CharPtr != '\n') && (*CharPtr != '\r') && |
1337 | (*CharPtr != '\0')) { |
1338 | if (*CharPtr == '!') |
1339 | CharPtr++; |
1340 | CharPtr++; |
1341 | } |
1342 | if (*CharPtr == '>') { |
1343 | EndLoc = StrLoc.getFromPointer(CharPtr + 1); |
1344 | return true; |
1345 | } |
1346 | return false; |
1347 | } |
1348 | |
1349 | /// creating a string without the escape characters '!'. |
1350 | static std::string altMacroString(StringRef AltMacroStr) { |
1351 | std::string Res; |
1352 | for (size_t Pos = 0; Pos < AltMacroStr.size(); Pos++) { |
1353 | if (AltMacroStr[Pos] == '!') |
1354 | Pos++; |
1355 | Res += AltMacroStr[Pos]; |
1356 | } |
1357 | return Res; |
1358 | } |
1359 | |
1360 | /// Parse an expression and return it. |
1361 | /// |
1362 | /// expr ::= expr &&,|| expr -> lowest. |
1363 | /// expr ::= expr |,^,&,! expr |
1364 | /// expr ::= expr ==,!=,<>,<,<=,>,>= expr |
1365 | /// expr ::= expr <<,>> expr |
1366 | /// expr ::= expr +,- expr |
1367 | /// expr ::= expr *,/,% expr -> highest. |
1368 | /// expr ::= primaryexpr |
1369 | /// |
1370 | bool AsmParser::parseExpression(const MCExpr *&Res, SMLoc &EndLoc) { |
1371 | // Parse the expression. |
1372 | Res = nullptr; |
1373 | if (getTargetParser().parsePrimaryExpr(Res, EndLoc) || |
1374 | parseBinOpRHS(1, Res, EndLoc)) |
1375 | return true; |
1376 | |
1377 | // As a special case, we support 'a op b @ modifier' by rewriting the |
1378 | // expression to include the modifier. This is inefficient, but in general we |
1379 | // expect users to use 'a@modifier op b'. |
1380 | if (Lexer.getKind() == AsmToken::At) { |
1381 | Lex(); |
1382 | |
1383 | if (Lexer.isNot(AsmToken::Identifier)) |
1384 | return TokError("unexpected symbol modifier following '@'"); |
1385 | |
1386 | MCSymbolRefExpr::VariantKind Variant = |
1387 | MCSymbolRefExpr::getVariantKindForName(getTok().getIdentifier()); |
1388 | if (Variant == MCSymbolRefExpr::VK_Invalid) |
1389 | return TokError("invalid variant '" + getTok().getIdentifier() + "'"); |
1390 | |
1391 | const MCExpr *ModifiedRes = applyModifierToExpr(Res, Variant); |
1392 | if (!ModifiedRes) { |
1393 | return TokError("invalid modifier '" + getTok().getIdentifier() + |
1394 | "' (no symbols present)"); |
1395 | } |
1396 | |
1397 | Res = ModifiedRes; |
1398 | Lex(); |
1399 | } |
1400 | |
1401 | // Try to constant fold it up front, if possible. Do not exploit |
1402 | // assembler here. |
1403 | int64_t Value; |
1404 | if (Res->evaluateAsAbsolute(Value)) |
1405 | Res = MCConstantExpr::create(Value, getContext()); |
1406 | |
1407 | return false; |
1408 | } |
1409 | |
1410 | bool AsmParser::parseParenExpression(const MCExpr *&Res, SMLoc &EndLoc) { |
1411 | Res = nullptr; |
1412 | return parseParenExpr(Res, EndLoc) || parseBinOpRHS(1, Res, EndLoc); |
1413 | } |
1414 | |
1415 | bool AsmParser::parseParenExprOfDepth(unsigned ParenDepth, const MCExpr *&Res, |
1416 | SMLoc &EndLoc) { |
1417 | if (parseParenExpr(Res, EndLoc)) |
1418 | return true; |
1419 | |
1420 | for (; ParenDepth > 0; --ParenDepth) { |
1421 | if (parseBinOpRHS(1, Res, EndLoc)) |
1422 | return true; |
1423 | |
1424 | // We don't Lex() the last RParen. |
1425 | // This is the same behavior as parseParenExpression(). |
1426 | if (ParenDepth - 1 > 0) { |
1427 | EndLoc = getTok().getEndLoc(); |
1428 | if (parseToken(AsmToken::RParen, |
1429 | "expected ')' in parentheses expression")) |
1430 | return true; |
1431 | } |
1432 | } |
1433 | return false; |
1434 | } |
1435 | |
1436 | bool AsmParser::parseAbsoluteExpression(int64_t &Res) { |
1437 | const MCExpr *Expr; |
1438 | |
1439 | SMLoc StartLoc = Lexer.getLoc(); |
1440 | if (parseExpression(Expr)) |
1441 | return true; |
1442 | |
1443 | if (!Expr->evaluateAsAbsolute(Res, getStreamer().getAssemblerPtr())) |
1444 | return Error(StartLoc, "expected absolute expression"); |
1445 | |
1446 | return false; |
1447 | } |
1448 | |
1449 | static unsigned getDarwinBinOpPrecedence(AsmToken::TokenKind K, |
1450 | MCBinaryExpr::Opcode &Kind, |
1451 | bool ShouldUseLogicalShr) { |
1452 | switch (K) { |
1453 | default: |
1454 | return 0; // not a binop. |
1455 | |
1456 | // Lowest Precedence: &&, || |
1457 | case AsmToken::AmpAmp: |
1458 | Kind = MCBinaryExpr::LAnd; |
1459 | return 1; |
1460 | case AsmToken::PipePipe: |
1461 | Kind = MCBinaryExpr::LOr; |
1462 | return 1; |
1463 | |
1464 | // Low Precedence: |, &, ^ |
1465 | // |
1466 | // FIXME: gas seems to support '!' as an infix operator? |
1467 | case AsmToken::Pipe: |
1468 | Kind = MCBinaryExpr::Or; |
1469 | return 2; |
1470 | case AsmToken::Caret: |
1471 | Kind = MCBinaryExpr::Xor; |
1472 | return 2; |
1473 | case AsmToken::Amp: |
1474 | Kind = MCBinaryExpr::And; |
1475 | return 2; |
1476 | |
1477 | // Low Intermediate Precedence: ==, !=, <>, <, <=, >, >= |
1478 | case AsmToken::EqualEqual: |
1479 | Kind = MCBinaryExpr::EQ; |
1480 | return 3; |
1481 | case AsmToken::ExclaimEqual: |
1482 | case AsmToken::LessGreater: |
1483 | Kind = MCBinaryExpr::NE; |
1484 | return 3; |
1485 | case AsmToken::Less: |
1486 | Kind = MCBinaryExpr::LT; |
1487 | return 3; |
1488 | case AsmToken::LessEqual: |
1489 | Kind = MCBinaryExpr::LTE; |
1490 | return 3; |
1491 | case AsmToken::Greater: |
1492 | Kind = MCBinaryExpr::GT; |
1493 | return 3; |
1494 | case AsmToken::GreaterEqual: |
1495 | Kind = MCBinaryExpr::GTE; |
1496 | return 3; |
1497 | |
1498 | // Intermediate Precedence: <<, >> |
1499 | case AsmToken::LessLess: |
1500 | Kind = MCBinaryExpr::Shl; |
1501 | return 4; |
1502 | case AsmToken::GreaterGreater: |
1503 | Kind = ShouldUseLogicalShr ? MCBinaryExpr::LShr : MCBinaryExpr::AShr; |
1504 | return 4; |
1505 | |
1506 | // High Intermediate Precedence: +, - |
1507 | case AsmToken::Plus: |
1508 | Kind = MCBinaryExpr::Add; |
1509 | return 5; |
1510 | case AsmToken::Minus: |
1511 | Kind = MCBinaryExpr::Sub; |
1512 | return 5; |
1513 | |
1514 | // Highest Precedence: *, /, % |
1515 | case AsmToken::Star: |
1516 | Kind = MCBinaryExpr::Mul; |
1517 | return 6; |
1518 | case AsmToken::Slash: |
1519 | Kind = MCBinaryExpr::Div; |
1520 | return 6; |
1521 | case AsmToken::Percent: |
1522 | Kind = MCBinaryExpr::Mod; |
1523 | return 6; |
1524 | } |
1525 | } |
1526 | |
1527 | static unsigned getGNUBinOpPrecedence(AsmToken::TokenKind K, |
1528 | MCBinaryExpr::Opcode &Kind, |
1529 | bool ShouldUseLogicalShr) { |
1530 | switch (K) { |
1531 | default: |
1532 | return 0; // not a binop. |
1533 | |
1534 | // Lowest Precedence: &&, || |
1535 | case AsmToken::AmpAmp: |
1536 | Kind = MCBinaryExpr::LAnd; |
1537 | return 2; |
1538 | case AsmToken::PipePipe: |
1539 | Kind = MCBinaryExpr::LOr; |
1540 | return 1; |
1541 | |
1542 | // Low Precedence: ==, !=, <>, <, <=, >, >= |
1543 | case AsmToken::EqualEqual: |
1544 | Kind = MCBinaryExpr::EQ; |
1545 | return 3; |
1546 | case AsmToken::ExclaimEqual: |
1547 | case AsmToken::LessGreater: |
1548 | Kind = MCBinaryExpr::NE; |
1549 | return 3; |
1550 | case AsmToken::Less: |
1551 | Kind = MCBinaryExpr::LT; |
1552 | return 3; |
1553 | case AsmToken::LessEqual: |
1554 | Kind = MCBinaryExpr::LTE; |
1555 | return 3; |
1556 | case AsmToken::Greater: |
1557 | Kind = MCBinaryExpr::GT; |
1558 | return 3; |
1559 | case AsmToken::GreaterEqual: |
1560 | Kind = MCBinaryExpr::GTE; |
1561 | return 3; |
1562 | |
1563 | // Low Intermediate Precedence: +, - |
1564 | case AsmToken::Plus: |
1565 | Kind = MCBinaryExpr::Add; |
1566 | return 4; |
1567 | case AsmToken::Minus: |
1568 | Kind = MCBinaryExpr::Sub; |
1569 | return 4; |
1570 | |
1571 | // High Intermediate Precedence: |, &, ^ |
1572 | // |
1573 | // FIXME: gas seems to support '!' as an infix operator? |
1574 | case AsmToken::Pipe: |
1575 | Kind = MCBinaryExpr::Or; |
1576 | return 5; |
1577 | case AsmToken::Caret: |
1578 | Kind = MCBinaryExpr::Xor; |
1579 | return 5; |
1580 | case AsmToken::Amp: |
1581 | Kind = MCBinaryExpr::And; |
1582 | return 5; |
1583 | |
1584 | // Highest Precedence: *, /, %, <<, >> |
1585 | case AsmToken::Star: |
1586 | Kind = MCBinaryExpr::Mul; |
1587 | return 6; |
1588 | case AsmToken::Slash: |
1589 | Kind = MCBinaryExpr::Div; |
1590 | return 6; |
1591 | case AsmToken::Percent: |
1592 | Kind = MCBinaryExpr::Mod; |
1593 | return 6; |
1594 | case AsmToken::LessLess: |
1595 | Kind = MCBinaryExpr::Shl; |
1596 | return 6; |
1597 | case AsmToken::GreaterGreater: |
1598 | Kind = ShouldUseLogicalShr ? MCBinaryExpr::LShr : MCBinaryExpr::AShr; |
1599 | return 6; |
1600 | } |
1601 | } |
1602 | |
1603 | unsigned AsmParser::getBinOpPrecedence(AsmToken::TokenKind K, |
1604 | MCBinaryExpr::Opcode &Kind) { |
1605 | bool ShouldUseLogicalShr = MAI.shouldUseLogicalShr(); |
1606 | return IsDarwin ? getDarwinBinOpPrecedence(K, Kind, ShouldUseLogicalShr) |
1607 | : getGNUBinOpPrecedence(K, Kind, ShouldUseLogicalShr); |
1608 | } |
1609 | |
1610 | /// Parse all binary operators with precedence >= 'Precedence'. |
1611 | /// Res contains the LHS of the expression on input. |
1612 | bool AsmParser::parseBinOpRHS(unsigned Precedence, const MCExpr *&Res, |
1613 | SMLoc &EndLoc) { |
1614 | SMLoc StartLoc = Lexer.getLoc(); |
1615 | while (true) { |
1616 | MCBinaryExpr::Opcode Kind = MCBinaryExpr::Add; |
1617 | unsigned TokPrec = getBinOpPrecedence(Lexer.getKind(), Kind); |
1618 | |
1619 | // If the next token is lower precedence than we are allowed to eat, return |
1620 | // successfully with what we ate already. |
1621 | if (TokPrec < Precedence) |
1622 | return false; |
1623 | |
1624 | Lex(); |
1625 | |
1626 | // Eat the next primary expression. |
1627 | const MCExpr *RHS; |
1628 | if (getTargetParser().parsePrimaryExpr(RHS, EndLoc)) |
1629 | return true; |
1630 | |
1631 | // If BinOp binds less tightly with RHS than the operator after RHS, let |
1632 | // the pending operator take RHS as its LHS. |
1633 | MCBinaryExpr::Opcode Dummy; |
1634 | unsigned NextTokPrec = getBinOpPrecedence(Lexer.getKind(), Dummy); |
1635 | if (TokPrec < NextTokPrec && parseBinOpRHS(TokPrec + 1, RHS, EndLoc)) |
1636 | return true; |
1637 | |
1638 | // Merge LHS and RHS according to operator. |
1639 | Res = MCBinaryExpr::create(Kind, Res, RHS, getContext(), StartLoc); |
1640 | } |
1641 | } |
1642 | |
1643 | /// ParseStatement: |
1644 | /// ::= EndOfStatement |
1645 | /// ::= Label* Directive ...Operands... EndOfStatement |
1646 | /// ::= Label* Identifier OperandList* EndOfStatement |
1647 | bool AsmParser::parseStatement(ParseStatementInfo &Info, |
1648 | MCAsmParserSemaCallback *SI) { |
1649 | assert(!hasPendingError() && "parseStatement started with pending error")((!hasPendingError() && "parseStatement started with pending error" ) ? static_cast<void> (0) : __assert_fail ("!hasPendingError() && \"parseStatement started with pending error\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/MC/MCParser/AsmParser.cpp" , 1649, __PRETTY_FUNCTION__)); |
1650 | // Eat initial spaces and comments |
1651 | while (Lexer.is(AsmToken::Space)) |
1652 | Lex(); |
1653 | if (Lexer.is(AsmToken::EndOfStatement)) { |
1654 | // if this is a line comment we can drop it safely |
1655 | if (getTok().getString().empty() || getTok().getString().front() == '\r' || |
1656 | getTok().getString().front() == '\n') |
1657 | Out.AddBlankLine(); |
1658 | Lex(); |
1659 | return false; |
1660 | } |
1661 | // Statements always start with an identifier. |
1662 | AsmToken ID = getTok(); |
1663 | SMLoc IDLoc = ID.getLoc(); |
1664 | StringRef IDVal; |
1665 | int64_t LocalLabelVal = -1; |
1666 | if (Lexer.is(AsmToken::HashDirective)) |
1667 | return parseCppHashLineFilenameComment(IDLoc); |
1668 | // Allow an integer followed by a ':' as a directional local label. |
1669 | if (Lexer.is(AsmToken::Integer)) { |
1670 | LocalLabelVal = getTok().getIntVal(); |
1671 | if (LocalLabelVal < 0) { |
1672 | if (!TheCondState.Ignore) { |
1673 | Lex(); // always eat a token |
1674 | return Error(IDLoc, "unexpected token at start of statement"); |
1675 | } |
1676 | IDVal = ""; |
1677 | } else { |
1678 | IDVal = getTok().getString(); |
1679 | Lex(); // Consume the integer token to be used as an identifier token. |
1680 | if (Lexer.getKind() != AsmToken::Colon) { |
1681 | if (!TheCondState.Ignore) { |
1682 | Lex(); // always eat a token |
1683 | return Error(IDLoc, "unexpected token at start of statement"); |
1684 | } |
1685 | } |
1686 | } |
1687 | } else if (Lexer.is(AsmToken::Dot)) { |
1688 | // Treat '.' as a valid identifier in this context. |
1689 | Lex(); |
1690 | IDVal = "."; |
1691 | } else if (Lexer.is(AsmToken::LCurly)) { |
1692 | // Treat '{' as a valid identifier in this context. |
1693 | Lex(); |
1694 | IDVal = "{"; |
1695 | |
1696 | } else if (Lexer.is(AsmToken::RCurly)) { |
1697 | // Treat '}' as a valid identifier in this context. |
1698 | Lex(); |
1699 | IDVal = "}"; |
1700 | } else if (Lexer.is(AsmToken::Star) && |
1701 | getTargetParser().starIsStartOfStatement()) { |
1702 | // Accept '*' as a valid start of statement. |
1703 | Lex(); |
1704 | IDVal = "*"; |
1705 | } else if (parseIdentifier(IDVal)) { |
1706 | if (!TheCondState.Ignore) { |
1707 | Lex(); // always eat a token |
1708 | return Error(IDLoc, "unexpected token at start of statement"); |
1709 | } |
1710 | IDVal = ""; |
1711 | } |
1712 | |
1713 | // Handle conditional assembly here before checking for skipping. We |
1714 | // have to do this so that .endif isn't skipped in a ".if 0" block for |
1715 | // example. |
1716 | StringMap<DirectiveKind>::const_iterator DirKindIt = |
1717 | DirectiveKindMap.find(IDVal); |
1718 | DirectiveKind DirKind = (DirKindIt == DirectiveKindMap.end()) |
1719 | ? DK_NO_DIRECTIVE |
1720 | : DirKindIt->getValue(); |
1721 | switch (DirKind) { |
1722 | default: |
1723 | break; |
1724 | case DK_IF: |
1725 | case DK_IFEQ: |
1726 | case DK_IFGE: |
1727 | case DK_IFGT: |
1728 | case DK_IFLE: |
1729 | case DK_IFLT: |
1730 | case DK_IFNE: |
1731 | return parseDirectiveIf(IDLoc, DirKind); |
1732 | case DK_IFB: |
1733 | return parseDirectiveIfb(IDLoc, true); |
1734 | case DK_IFNB: |
1735 | return parseDirectiveIfb(IDLoc, false); |
1736 | case DK_IFC: |
1737 | return parseDirectiveIfc(IDLoc, true); |
1738 | case DK_IFEQS: |
1739 | return parseDirectiveIfeqs(IDLoc, true); |
1740 | case DK_IFNC: |
1741 | return parseDirectiveIfc(IDLoc, false); |
1742 | case DK_IFNES: |
1743 | return parseDirectiveIfeqs(IDLoc, false); |
1744 | case DK_IFDEF: |
1745 | return parseDirectiveIfdef(IDLoc, true); |
1746 | case DK_IFNDEF: |
1747 | case DK_IFNOTDEF: |
1748 | return parseDirectiveIfdef(IDLoc, false); |
1749 | case DK_ELSEIF: |
1750 | return parseDirectiveElseIf(IDLoc); |
1751 | case DK_ELSE: |
1752 | return parseDirectiveElse(IDLoc); |
1753 | case DK_ENDIF: |
1754 | return parseDirectiveEndIf(IDLoc); |
1755 | } |
1756 | |
1757 | // Ignore the statement if in the middle of inactive conditional |
1758 | // (e.g. ".if 0"). |
1759 | if (TheCondState.Ignore) { |
1760 | eatToEndOfStatement(); |
1761 | return false; |
1762 | } |
1763 | |
1764 | // FIXME: Recurse on local labels? |
1765 | |
1766 | // See what kind of statement we have. |
1767 | switch (Lexer.getKind()) { |
1768 | case AsmToken::Colon: { |
1769 | if (!getTargetParser().isLabel(ID)) |
1770 | break; |
1771 | if (checkForValidSection()) |
1772 | return true; |
1773 | |
1774 | // identifier ':' -> Label. |
1775 | Lex(); |
1776 | |
1777 | // Diagnose attempt to use '.' as a label. |
1778 | if (IDVal == ".") |
1779 | return Error(IDLoc, "invalid use of pseudo-symbol '.' as a label"); |
1780 | |
1781 | // Diagnose attempt to use a variable as a label. |
1782 | // |
1783 | // FIXME: Diagnostics. Note the location of the definition as a label. |
1784 | // FIXME: This doesn't diagnose assignment to a symbol which has been |
1785 | // implicitly marked as external. |
1786 | MCSymbol *Sym; |
1787 | if (LocalLabelVal == -1) { |
1788 | if (ParsingInlineAsm && SI) { |
1789 | StringRef RewrittenLabel = |
1790 | SI->LookupInlineAsmLabel(IDVal, getSourceManager(), IDLoc, true); |
1791 | assert(!RewrittenLabel.empty() &&((!RewrittenLabel.empty() && "We should have an internal name here." ) ? static_cast<void> (0) : __assert_fail ("!RewrittenLabel.empty() && \"We should have an internal name here.\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/MC/MCParser/AsmParser.cpp" , 1792, __PRETTY_FUNCTION__)) |
1792 | "We should have an internal name here.")((!RewrittenLabel.empty() && "We should have an internal name here." ) ? static_cast<void> (0) : __assert_fail ("!RewrittenLabel.empty() && \"We should have an internal name here.\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/MC/MCParser/AsmParser.cpp" , 1792, __PRETTY_FUNCTION__)); |
1793 | Info.AsmRewrites->emplace_back(AOK_Label, IDLoc, IDVal.size(), |
1794 | RewrittenLabel); |
1795 | IDVal = RewrittenLabel; |
1796 | } |
1797 | Sym = getContext().getOrCreateSymbol(IDVal); |
1798 | } else |
1799 | Sym = Ctx.createDirectionalLocalSymbol(LocalLabelVal); |
1800 | // End of Labels should be treated as end of line for lexing |
1801 | // purposes but that information is not available to the Lexer who |
1802 | // does not understand Labels. This may cause us to see a Hash |
1803 | // here instead of a preprocessor line comment. |
1804 | if (getTok().is(AsmToken::Hash)) { |
1805 | StringRef CommentStr = parseStringToEndOfStatement(); |
1806 | Lexer.Lex(); |
1807 | Lexer.UnLex(AsmToken(AsmToken::EndOfStatement, CommentStr)); |
1808 | } |
1809 | |
1810 | // Consume any end of statement token, if present, to avoid spurious |
1811 | // AddBlankLine calls(). |
1812 | if (getTok().is(AsmToken::EndOfStatement)) { |
1813 | Lex(); |
1814 | } |
1815 | |
1816 | getTargetParser().doBeforeLabelEmit(Sym); |
1817 | |
1818 | // Emit the label. |
1819 | if (!getTargetParser().isParsingInlineAsm()) |
1820 | Out.EmitLabel(Sym, IDLoc); |
1821 | |
1822 | // If we are generating dwarf for assembly source files then gather the |
1823 | // info to make a dwarf label entry for this label if needed. |
1824 | if (enabledGenDwarfForAssembly()) |
1825 | MCGenDwarfLabelEntry::Make(Sym, &getStreamer(), getSourceManager(), |
1826 | IDLoc); |
1827 | |
1828 | getTargetParser().onLabelParsed(Sym); |
1829 | |
1830 | return false; |
1831 | } |
1832 | |
1833 | case AsmToken::Equal: |
1834 | if (!getTargetParser().equalIsAsmAssignment()) |
1835 | break; |
1836 | // identifier '=' ... -> assignment statement |
1837 | Lex(); |
1838 | |
1839 | return parseAssignment(IDVal, true); |
1840 | |
1841 | default: // Normal instruction or directive. |
1842 | break; |
1843 | } |
1844 | |
1845 | // If macros are enabled, check to see if this is a macro instantiation. |
1846 | if (areMacrosEnabled()) |
1847 | if (const MCAsmMacro *M = getContext().lookupMacro(IDVal)) { |
1848 | return handleMacroEntry(M, IDLoc); |
1849 | } |
1850 | |
1851 | // Otherwise, we have a normal instruction or directive. |
1852 | |
1853 | // Directives start with "." |
1854 | if (IDVal.startswith(".") && IDVal != ".") { |
1855 | // There are several entities interested in parsing directives: |
1856 | // |
1857 | // 1. The target-specific assembly parser. Some directives are target |
1858 | // specific or may potentially behave differently on certain targets. |
1859 | // 2. Asm parser extensions. For example, platform-specific parsers |
1860 | // (like the ELF parser) register themselves as extensions. |
1861 | // 3. The generic directive parser implemented by this class. These are |
1862 | // all the directives that behave in a target and platform independent |
1863 | // manner, or at least have a default behavior that's shared between |
1864 | // all targets and platforms. |
1865 | |
1866 | getTargetParser().flushPendingInstructions(getStreamer()); |
1867 | |
1868 | SMLoc StartTokLoc = getTok().getLoc(); |
1869 | bool TPDirectiveReturn = getTargetParser().ParseDirective(ID); |
1870 | |
1871 | if (hasPendingError()) |
1872 | return true; |
1873 | // Currently the return value should be true if we are |
1874 | // uninterested but as this is at odds with the standard parsing |
1875 | // convention (return true = error) we have instances of a parsed |
1876 | // directive that fails returning true as an error. Catch these |
1877 | // cases as best as possible errors here. |
1878 | if (TPDirectiveReturn && StartTokLoc != getTok().getLoc()) |
1879 | return true; |
1880 | // Return if we did some parsing or believe we succeeded. |
1881 | if (!TPDirectiveReturn || StartTokLoc != getTok().getLoc()) |
1882 | return false; |
1883 | |
1884 | // Next, check the extension directive map to see if any extension has |
1885 | // registered itself to parse this directive. |
1886 | std::pair<MCAsmParserExtension *, DirectiveHandler> Handler = |
1887 | ExtensionDirectiveMap.lookup(IDVal); |
1888 | if (Handler.first) |
1889 | return (*Handler.second)(Handler.first, IDVal, IDLoc); |
1890 | |
1891 | // Finally, if no one else is interested in this directive, it must be |
1892 | // generic and familiar to this class. |
1893 | switch (DirKind) { |
1894 | default: |
1895 | break; |
1896 | case DK_SET: |
1897 | case DK_EQU: |
1898 | return parseDirectiveSet(IDVal, true); |
1899 | case DK_EQUIV: |
1900 | return parseDirectiveSet(IDVal, false); |
1901 | case DK_ASCII: |
1902 | return parseDirectiveAscii(IDVal, false); |
1903 | case DK_ASCIZ: |
1904 | case DK_STRING: |
1905 | return parseDirectiveAscii(IDVal, true); |
1906 | case DK_BYTE: |
1907 | case DK_DC_B: |
1908 | return parseDirectiveValue(IDVal, 1); |
1909 | case DK_DC: |
1910 | case DK_DC_W: |
1911 | case DK_SHORT: |
1912 | case DK_VALUE: |
1913 | case DK_2BYTE: |
1914 | return parseDirectiveValue(IDVal, 2); |
1915 | case DK_LONG: |
1916 | case DK_INT: |
1917 | case DK_4BYTE: |
1918 | case DK_DC_L: |
1919 | return parseDirectiveValue(IDVal, 4); |
1920 | case DK_QUAD: |
1921 | case DK_8BYTE: |
1922 | return parseDirectiveValue(IDVal, 8); |
1923 | case DK_DC_A: |
1924 | return parseDirectiveValue( |
1925 | IDVal, getContext().getAsmInfo()->getCodePointerSize()); |
1926 | case DK_OCTA: |
1927 | return parseDirectiveOctaValue(IDVal); |
1928 | case DK_SINGLE: |
1929 | case DK_FLOAT: |
1930 | case DK_DC_S: |
1931 | return parseDirectiveRealValue(IDVal, APFloat::IEEEsingle()); |
1932 | case DK_DOUBLE: |
1933 | case DK_DC_D: |
1934 | return parseDirectiveRealValue(IDVal, APFloat::IEEEdouble()); |
1935 | case DK_ALIGN: { |
1936 | bool IsPow2 = !getContext().getAsmInfo()->getAlignmentIsInBytes(); |
1937 | return parseDirectiveAlign(IsPow2, /*ExprSize=*/1); |
1938 | } |
1939 | case DK_ALIGN32: { |
1940 | bool IsPow2 = !getContext().getAsmInfo()->getAlignmentIsInBytes(); |
1941 | return parseDirectiveAlign(IsPow2, /*ExprSize=*/4); |
1942 | } |
1943 | case DK_BALIGN: |
1944 | return parseDirectiveAlign(/*IsPow2=*/false, /*ExprSize=*/1); |
1945 | case DK_BALIGNW: |
1946 | return parseDirectiveAlign(/*IsPow2=*/false, /*ExprSize=*/2); |
1947 | case DK_BALIGNL: |
1948 | return parseDirectiveAlign(/*IsPow2=*/false, /*ExprSize=*/4); |
1949 | case DK_P2ALIGN: |
1950 | return parseDirectiveAlign(/*IsPow2=*/true, /*ExprSize=*/1); |
1951 | case DK_P2ALIGNW: |
1952 | return parseDirectiveAlign(/*IsPow2=*/true, /*ExprSize=*/2); |
1953 | case DK_P2ALIGNL: |
1954 | return parseDirectiveAlign(/*IsPow2=*/true, /*ExprSize=*/4); |
1955 | case DK_ORG: |
1956 | return parseDirectiveOrg(); |
1957 | case DK_FILL: |
1958 | return parseDirectiveFill(); |
1959 | case DK_ZERO: |
1960 | return parseDirectiveZero(); |
1961 | case DK_EXTERN: |
1962 | eatToEndOfStatement(); // .extern is the default, ignore it. |
1963 | return false; |
1964 | case DK_GLOBL: |
1965 | case DK_GLOBAL: |
1966 | return parseDirectiveSymbolAttribute(MCSA_Global); |
1967 | case DK_LAZY_REFERENCE: |
1968 | return parseDirectiveSymbolAttribute(MCSA_LazyReference); |
1969 | case DK_NO_DEAD_STRIP: |
1970 | return parseDirectiveSymbolAttribute(MCSA_NoDeadStrip); |
1971 | case DK_SYMBOL_RESOLVER: |
1972 | return parseDirectiveSymbolAttribute(MCSA_SymbolResolver); |
1973 | case DK_PRIVATE_EXTERN: |
1974 | return parseDirectiveSymbolAttribute(MCSA_PrivateExtern); |
1975 | case DK_REFERENCE: |
1976 | return parseDirectiveSymbolAttribute(MCSA_Reference); |
1977 | case DK_WEAK_DEFINITION: |
1978 | return parseDirectiveSymbolAttribute(MCSA_WeakDefinition); |
1979 | case DK_WEAK_REFERENCE: |
1980 | return parseDirectiveSymbolAttribute(MCSA_WeakReference); |
1981 | case DK_WEAK_DEF_CAN_BE_HIDDEN: |
1982 | return parseDirectiveSymbolAttribute(MCSA_WeakDefAutoPrivate); |
1983 | case DK_COMM: |
1984 | case DK_COMMON: |
1985 | return parseDirectiveComm(/*IsLocal=*/false); |
1986 | case DK_LCOMM: |
1987 | return parseDirectiveComm(/*IsLocal=*/true); |
1988 | case DK_ABORT: |
1989 | return parseDirectiveAbort(); |
1990 | case DK_INCLUDE: |
1991 | return parseDirectiveInclude(); |
1992 | case DK_INCBIN: |
1993 | return parseDirectiveIncbin(); |
1994 | case DK_CODE16: |
1995 | case DK_CODE16GCC: |
1996 | return TokError(Twine(IDVal) + |
1997 | " not currently supported for this target"); |
1998 | case DK_REPT: |
1999 | return parseDirectiveRept(IDLoc, IDVal); |
2000 | case DK_IRP: |
2001 | return parseDirectiveIrp(IDLoc); |
2002 | case DK_IRPC: |
2003 | return parseDirectiveIrpc(IDLoc); |
2004 | case DK_ENDR: |
2005 | return parseDirectiveEndr(IDLoc); |
2006 | case DK_BUNDLE_ALIGN_MODE: |
2007 | return parseDirectiveBundleAlignMode(); |
2008 | case DK_BUNDLE_LOCK: |
2009 | return parseDirectiveBundleLock(); |
2010 | case DK_BUNDLE_UNLOCK: |
2011 | return parseDirectiveBundleUnlock(); |
2012 | case DK_SLEB128: |
2013 | return parseDirectiveLEB128(true); |
2014 | case DK_ULEB128: |
2015 | return parseDirectiveLEB128(false); |
2016 | case DK_SPACE: |
2017 | case DK_SKIP: |
2018 | return parseDirectiveSpace(IDVal); |
2019 | case DK_FILE: |
2020 | return parseDirectiveFile(IDLoc); |
2021 | case DK_LINE: |
2022 | return parseDirectiveLine(); |
2023 | case DK_LOC: |
2024 | return parseDirectiveLoc(); |
2025 | case DK_STABS: |
2026 | return parseDirectiveStabs(); |
2027 | case DK_CV_FILE: |
2028 | return parseDirectiveCVFile(); |
2029 | case DK_CV_FUNC_ID: |
2030 | return parseDirectiveCVFuncId(); |
2031 | case DK_CV_INLINE_SITE_ID: |
2032 | return parseDirectiveCVInlineSiteId(); |
2033 | case DK_CV_LOC: |
2034 | return parseDirectiveCVLoc(); |
2035 | case DK_CV_LINETABLE: |
2036 | return parseDirectiveCVLinetable(); |
2037 | case DK_CV_INLINE_LINETABLE: |
2038 | return parseDirectiveCVInlineLinetable(); |
2039 | case DK_CV_DEF_RANGE: |
2040 | return parseDirectiveCVDefRange(); |
2041 | case DK_CV_STRING: |
2042 | return parseDirectiveCVString(); |
2043 | case DK_CV_STRINGTABLE: |
2044 | return parseDirectiveCVStringTable(); |
2045 | case DK_CV_FILECHECKSUMS: |
2046 | return parseDirectiveCVFileChecksums(); |
2047 | case DK_CV_FILECHECKSUM_OFFSET: |
2048 | return parseDirectiveCVFileChecksumOffset(); |
2049 | case DK_CV_FPO_DATA: |
2050 | return parseDirectiveCVFPOData(); |
2051 | case DK_CFI_SECTIONS: |
2052 | return parseDirectiveCFISections(); |
2053 | case DK_CFI_STARTPROC: |
2054 | return parseDirectiveCFIStartProc(); |
2055 | case DK_CFI_ENDPROC: |
2056 | return parseDirectiveCFIEndProc(); |
2057 | case DK_CFI_DEF_CFA: |
2058 | return parseDirectiveCFIDefCfa(IDLoc); |
2059 | case DK_CFI_DEF_CFA_OFFSET: |
2060 | return parseDirectiveCFIDefCfaOffset(); |
2061 | case DK_CFI_ADJUST_CFA_OFFSET: |
2062 | return parseDirectiveCFIAdjustCfaOffset(); |
2063 | case DK_CFI_DEF_CFA_REGISTER: |
2064 | return parseDirectiveCFIDefCfaRegister(IDLoc); |
2065 | case DK_CFI_OFFSET: |
2066 | return parseDirectiveCFIOffset(IDLoc); |
2067 | case DK_CFI_REL_OFFSET: |
2068 | return parseDirectiveCFIRelOffset(IDLoc); |
2069 | case DK_CFI_PERSONALITY: |
2070 | return parseDirectiveCFIPersonalityOrLsda(true); |
2071 | case DK_CFI_LSDA: |
2072 | return parseDirectiveCFIPersonalityOrLsda(false); |
2073 | case DK_CFI_REMEMBER_STATE: |
2074 | return parseDirectiveCFIRememberState(); |
2075 | case DK_CFI_RESTORE_STATE: |
2076 | return parseDirectiveCFIRestoreState(); |
2077 | case DK_CFI_SAME_VALUE: |
2078 | return parseDirectiveCFISameValue(IDLoc); |
2079 | case DK_CFI_RESTORE: |
2080 | return parseDirectiveCFIRestore(IDLoc); |
2081 | case DK_CFI_ESCAPE: |
2082 | return parseDirectiveCFIEscape(); |
2083 | case DK_CFI_RETURN_COLUMN: |
2084 | return parseDirectiveCFIReturnColumn(IDLoc); |
2085 | case DK_CFI_SIGNAL_FRAME: |
2086 | return parseDirectiveCFISignalFrame(); |
2087 | case DK_CFI_UNDEFINED: |
2088 | return parseDirectiveCFIUndefined(IDLoc); |
2089 | case DK_CFI_REGISTER: |
2090 | return parseDirectiveCFIRegister(IDLoc); |
2091 | case DK_CFI_WINDOW_SAVE: |
2092 | return parseDirectiveCFIWindowSave(); |
2093 | case DK_MACROS_ON: |
2094 | case DK_MACROS_OFF: |
2095 | return parseDirectiveMacrosOnOff(IDVal); |
2096 | case DK_MACRO: |
2097 | return parseDirectiveMacro(IDLoc); |
2098 | case DK_ALTMACRO: |
2099 | case DK_NOALTMACRO: |
2100 | return parseDirectiveAltmacro(IDVal); |
2101 | case DK_EXITM: |
2102 | return parseDirectiveExitMacro(IDVal); |
2103 | case DK_ENDM: |
2104 | case DK_ENDMACRO: |
2105 | return parseDirectiveEndMacro(IDVal); |
2106 | case DK_PURGEM: |
2107 | return parseDirectivePurgeMacro(IDLoc); |
2108 | case DK_END: |
2109 | return parseDirectiveEnd(IDLoc); |
2110 | case DK_ERR: |
2111 | return parseDirectiveError(IDLoc, false); |
2112 | case DK_ERROR: |
2113 | return parseDirectiveError(IDLoc, true); |
2114 | case DK_WARNING: |
2115 | return parseDirectiveWarning(IDLoc); |
2116 | case DK_RELOC: |
2117 | return parseDirectiveReloc(IDLoc); |
2118 | case DK_DCB: |
2119 | case DK_DCB_W: |
2120 | return parseDirectiveDCB(IDVal, 2); |
2121 | case DK_DCB_B: |
2122 | return parseDirectiveDCB(IDVal, 1); |
2123 | case DK_DCB_D: |
2124 | return parseDirectiveRealDCB(IDVal, APFloat::IEEEdouble()); |
2125 | case DK_DCB_L: |
2126 | return parseDirectiveDCB(IDVal, 4); |
2127 | case DK_DCB_S: |
2128 | return parseDirectiveRealDCB(IDVal, APFloat::IEEEsingle()); |
2129 | case DK_DC_X: |
2130 | case DK_DCB_X: |
2131 | return TokError(Twine(IDVal) + |
2132 | " not currently supported for this target"); |
2133 | case DK_DS: |
2134 | case DK_DS_W: |
2135 | return parseDirectiveDS(IDVal, 2); |
2136 | case DK_DS_B: |
2137 | return parseDirectiveDS(IDVal, 1); |
2138 | case DK_DS_D: |
2139 | return parseDirectiveDS(IDVal, 8); |
2140 | case DK_DS_L: |
2141 | case DK_DS_S: |
2142 | return parseDirectiveDS(IDVal, 4); |
2143 | case DK_DS_P: |
2144 | case DK_DS_X: |
2145 | return parseDirectiveDS(IDVal, 12); |
2146 | case DK_PRINT: |
2147 | return parseDirectivePrint(IDLoc); |
2148 | case DK_ADDRSIG: |
2149 | return parseDirectiveAddrsig(); |
2150 | case DK_ADDRSIG_SYM: |
2151 | return parseDirectiveAddrsigSym(); |
2152 | } |
2153 | |
2154 | return Error(IDLoc, "unknown directive"); |
2155 | } |
2156 | |
2157 | // __asm _emit or __asm __emit |
2158 | if (ParsingInlineAsm && (IDVal == "_emit" || IDVal == "__emit" || |
2159 | IDVal == "_EMIT" || IDVal == "__EMIT")) |
2160 | return parseDirectiveMSEmit(IDLoc, Info, IDVal.size()); |
2161 | |
2162 | // __asm align |
2163 | if (ParsingInlineAsm && (IDVal == "align" || IDVal == "ALIGN")) |
2164 | return parseDirectiveMSAlign(IDLoc, Info); |
2165 | |
2166 | if (ParsingInlineAsm && (IDVal == "even" || IDVal == "EVEN")) |
2167 | Info.AsmRewrites->emplace_back(AOK_EVEN, IDLoc, 4); |
2168 | if (checkForValidSection()) |
2169 | return true; |
2170 | |
2171 | // Canonicalize the opcode to lower case. |
2172 | std::string OpcodeStr = IDVal.lower(); |
2173 | ParseInstructionInfo IInfo(Info.AsmRewrites); |
2174 | bool ParseHadError = getTargetParser().ParseInstruction(IInfo, OpcodeStr, ID, |
2175 | Info.ParsedOperands); |
2176 | Info.ParseError = ParseHadError; |
2177 | |
2178 | // Dump the parsed representation, if requested. |
2179 | if (getShowParsedOperands()) { |
2180 | SmallString<256> Str; |
2181 | raw_svector_ostream OS(Str); |
2182 | OS << "parsed instruction: ["; |
2183 | for (unsigned i = 0; i != Info.ParsedOperands.size(); ++i) { |
2184 | if (i != 0) |
2185 | OS << ", "; |
2186 | Info.ParsedOperands[i]->print(OS); |
2187 | } |
2188 | OS << "]"; |
2189 | |
2190 | printMessage(IDLoc, SourceMgr::DK_Note, OS.str()); |
2191 | } |
2192 | |
2193 | // Fail even if ParseInstruction erroneously returns false. |
2194 | if (hasPendingError() || ParseHadError) |
2195 | return true; |
2196 | |
2197 | // If we are generating dwarf for the current section then generate a .loc |
2198 | // directive for the instruction. |
2199 | if (!ParseHadError && enabledGenDwarfForAssembly() && |
2200 | getContext().getGenDwarfSectionSyms().count( |
2201 | getStreamer().getCurrentSectionOnly())) { |
2202 | unsigned Line; |
2203 | if (ActiveMacros.empty()) |
2204 | Line = SrcMgr.FindLineNumber(IDLoc, CurBuffer); |
2205 | else |
2206 | Line = SrcMgr.FindLineNumber(ActiveMacros.front()->InstantiationLoc, |
2207 | ActiveMacros.front()->ExitBuffer); |
2208 | |
2209 | // If we previously parsed a cpp hash file line comment then make sure the |
2210 | // current Dwarf File is for the CppHashFilename if not then emit the |
2211 | // Dwarf File table for it and adjust the line number for the .loc. |
2212 | if (!CppHashInfo.Filename.empty()) { |
2213 | unsigned FileNumber = getStreamer().EmitDwarfFileDirective( |
2214 | 0, StringRef(), CppHashInfo.Filename); |
2215 | getContext().setGenDwarfFileNumber(FileNumber); |
2216 | |
2217 | unsigned CppHashLocLineNo = |
2218 | SrcMgr.FindLineNumber(CppHashInfo.Loc, CppHashInfo.Buf); |
2219 | Line = CppHashInfo.LineNumber - 1 + (Line - CppHashLocLineNo); |
2220 | } |
2221 | |
2222 | getStreamer().EmitDwarfLocDirective( |
2223 | getContext().getGenDwarfFileNumber(), Line, 0, |
2224 | DWARF2_LINE_DEFAULT_IS_STMT1 ? DWARF2_FLAG_IS_STMT(1 << 0) : 0, 0, 0, |
2225 | StringRef()); |
2226 | } |
2227 | |
2228 | // If parsing succeeded, match the instruction. |
2229 | if (!ParseHadError) { |
2230 | uint64_t ErrorInfo; |
2231 | if (getTargetParser().MatchAndEmitInstruction( |
2232 | IDLoc, Info.Opcode, Info.ParsedOperands, Out, ErrorInfo, |
2233 | getTargetParser().isParsingInlineAsm())) |
2234 | return true; |
2235 | } |
2236 | return false; |
2237 | } |
2238 | |
2239 | // Parse and erase curly braces marking block start/end |
2240 | bool |
2241 | AsmParser::parseCurlyBlockScope(SmallVectorImpl<AsmRewrite> &AsmStrRewrites) { |
2242 | // Identify curly brace marking block start/end |
2243 | if (Lexer.isNot(AsmToken::LCurly) && Lexer.isNot(AsmToken::RCurly)) |
2244 | return false; |
2245 | |
2246 | SMLoc StartLoc = Lexer.getLoc(); |
2247 | Lex(); // Eat the brace |
2248 | if (Lexer.is(AsmToken::EndOfStatement)) |
2249 | Lex(); // Eat EndOfStatement following the brace |
2250 | |
2251 | // Erase the block start/end brace from the output asm string |
2252 | AsmStrRewrites.emplace_back(AOK_Skip, StartLoc, Lexer.getLoc().getPointer() - |
2253 | StartLoc.getPointer()); |
2254 | return true; |
2255 | } |
2256 | |
2257 | /// parseCppHashLineFilenameComment as this: |
2258 | /// ::= # number "filename" |
2259 | bool AsmParser::parseCppHashLineFilenameComment(SMLoc L) { |
2260 | Lex(); // Eat the hash token. |
2261 | // Lexer only ever emits HashDirective if it fully formed if it's |
2262 | // done the checking already so this is an internal error. |
2263 | assert(getTok().is(AsmToken::Integer) &&((getTok().is(AsmToken::Integer) && "Lexing Cpp line comment: Expected Integer" ) ? static_cast<void> (0) : __assert_fail ("getTok().is(AsmToken::Integer) && \"Lexing Cpp line comment: Expected Integer\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/MC/MCParser/AsmParser.cpp" , 2264, __PRETTY_FUNCTION__)) |
2264 | "Lexing Cpp line comment: Expected Integer")((getTok().is(AsmToken::Integer) && "Lexing Cpp line comment: Expected Integer" ) ? static_cast<void> (0) : __assert_fail ("getTok().is(AsmToken::Integer) && \"Lexing Cpp line comment: Expected Integer\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/MC/MCParser/AsmParser.cpp" , 2264, __PRETTY_FUNCTION__)); |
2265 | int64_t LineNumber = getTok().getIntVal(); |
2266 | Lex(); |
2267 | assert(getTok().is(AsmToken::String) &&((getTok().is(AsmToken::String) && "Lexing Cpp line comment: Expected String" ) ? static_cast<void> (0) : __assert_fail ("getTok().is(AsmToken::String) && \"Lexing Cpp line comment: Expected String\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/MC/MCParser/AsmParser.cpp" , 2268, __PRETTY_FUNCTION__)) |
2268 | "Lexing Cpp line comment: Expected String")((getTok().is(AsmToken::String) && "Lexing Cpp line comment: Expected String" ) ? static_cast<void> (0) : __assert_fail ("getTok().is(AsmToken::String) && \"Lexing Cpp line comment: Expected String\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/MC/MCParser/AsmParser.cpp" , 2268, __PRETTY_FUNCTION__)); |
2269 | StringRef Filename = getTok().getString(); |
2270 | Lex(); |
2271 | |
2272 | // Get rid of the enclosing quotes. |
2273 | Filename = Filename.substr(1, Filename.size() - 2); |
2274 | |
2275 | // Save the SMLoc, Filename and LineNumber for later use by diagnostics. |
2276 | CppHashInfo.Loc = L; |
2277 | CppHashInfo.Filename = Filename; |
2278 | CppHashInfo.LineNumber = LineNumber; |
2279 | CppHashInfo.Buf = CurBuffer; |
2280 | return false; |
2281 | } |
2282 | |
2283 | /// will use the last parsed cpp hash line filename comment |
2284 | /// for the Filename and LineNo if any in the diagnostic. |
2285 | void AsmParser::DiagHandler(const SMDiagnostic &Diag, void *Context) { |
2286 | const AsmParser *Parser = static_cast<const AsmParser *>(Context); |
2287 | raw_ostream &OS = errs(); |
2288 | |
2289 | const SourceMgr &DiagSrcMgr = *Diag.getSourceMgr(); |
2290 | SMLoc DiagLoc = Diag.getLoc(); |
2291 | unsigned DiagBuf = DiagSrcMgr.FindBufferContainingLoc(DiagLoc); |
2292 | unsigned CppHashBuf = |
2293 | Parser->SrcMgr.FindBufferContainingLoc(Parser->CppHashInfo.Loc); |
2294 | |
2295 | // Like SourceMgr::printMessage() we need to print the include stack if any |
2296 | // before printing the message. |
2297 | unsigned DiagCurBuffer = DiagSrcMgr.FindBufferContainingLoc(DiagLoc); |
2298 | if (!Parser->SavedDiagHandler && DiagCurBuffer && |
2299 | DiagCurBuffer != DiagSrcMgr.getMainFileID()) { |
2300 | SMLoc ParentIncludeLoc = DiagSrcMgr.getParentIncludeLoc(DiagCurBuffer); |
2301 | DiagSrcMgr.PrintIncludeStack(ParentIncludeLoc, OS); |
2302 | } |
2303 | |
2304 | // If we have not parsed a cpp hash line filename comment or the source |
2305 | // manager changed or buffer changed (like in a nested include) then just |
2306 | // print the normal diagnostic using its Filename and LineNo. |
2307 | if (!Parser->CppHashInfo.LineNumber || &DiagSrcMgr != &Parser->SrcMgr || |
2308 | DiagBuf != CppHashBuf) { |
2309 | if (Parser->SavedDiagHandler) |
2310 | Parser->SavedDiagHandler(Diag, Parser->SavedDiagContext); |
2311 | else |
2312 | Diag.print(nullptr, OS); |
2313 | return; |
2314 | } |
2315 | |
2316 | // Use the CppHashFilename and calculate a line number based on the |
2317 | // CppHashInfo.Loc and CppHashInfo.LineNumber relative to this Diag's SMLoc |
2318 | // for the diagnostic. |
2319 | const std::string &Filename = Parser->CppHashInfo.Filename; |
2320 | |
2321 | int DiagLocLineNo = DiagSrcMgr.FindLineNumber(DiagLoc, DiagBuf); |
2322 | int CppHashLocLineNo = |
2323 | Parser->SrcMgr.FindLineNumber(Parser->CppHashInfo.Loc, CppHashBuf); |
2324 | int LineNo = |
2325 | Parser->CppHashInfo.LineNumber - 1 + (DiagLocLineNo - CppHashLocLineNo); |
2326 | |
2327 | SMDiagnostic NewDiag(*Diag.getSourceMgr(), Diag.getLoc(), Filename, LineNo, |
2328 | Diag.getColumnNo(), Diag.getKind(), Diag.getMessage(), |
2329 | Diag.getLineContents(), Diag.getRanges()); |
2330 | |
2331 | if (Parser->SavedDiagHandler) |
2332 | Parser->SavedDiagHandler(NewDiag, Parser->SavedDiagContext); |
2333 | else |
2334 | NewDiag.print(nullptr, OS); |
2335 | } |
2336 | |
2337 | // FIXME: This is mostly duplicated from the function in AsmLexer.cpp. The |
2338 | // difference being that that function accepts '@' as part of identifiers and |
2339 | // we can't do that. AsmLexer.cpp should probably be changed to handle |
2340 | // '@' as a special case when needed. |
2341 | static bool isIdentifierChar(char c) { |
2342 | return isalnum(static_cast<unsigned char>(c)) || c == '_' || c == '$' || |
2343 | c == '.'; |
2344 | } |
2345 | |
2346 | bool AsmParser::expandMacro(raw_svector_ostream &OS, StringRef Body, |
2347 | ArrayRef<MCAsmMacroParameter> Parameters, |
2348 | ArrayRef<MCAsmMacroArgument> A, |
2349 | bool EnableAtPseudoVariable, SMLoc L) { |
2350 | unsigned NParameters = Parameters.size(); |
2351 | bool HasVararg = NParameters ? Parameters.back().Vararg : false; |
2352 | if ((!IsDarwin || NParameters != 0) && NParameters != A.size()) |
2353 | return Error(L, "Wrong number of arguments"); |
2354 | |
2355 | // A macro without parameters is handled differently on Darwin: |
2356 | // gas accepts no arguments and does no substitutions |
2357 | while (!Body.empty()) { |
2358 | // Scan for the next substitution. |
2359 | std::size_t End = Body.size(), Pos = 0; |
2360 | for (; Pos != End; ++Pos) { |
2361 | // Check for a substitution or escape. |
2362 | if (IsDarwin && !NParameters) { |
2363 | // This macro has no parameters, look for $0, $1, etc. |
2364 | if (Body[Pos] != '$' || Pos + 1 == End) |
2365 | continue; |
2366 | |
2367 | char Next = Body[Pos + 1]; |
2368 | if (Next == '$' || Next == 'n' || |
2369 | isdigit(static_cast<unsigned char>(Next))) |
2370 | break; |
2371 | } else { |
2372 | // This macro has parameters, look for \foo, \bar, etc. |
2373 | if (Body[Pos] == '\\' && Pos + 1 != End) |
2374 | break; |
2375 | } |
2376 | } |
2377 | |
2378 | // Add the prefix. |
2379 | OS << Body.slice(0, Pos); |
2380 | |
2381 | // Check if we reached the end. |
2382 | if (Pos == End) |
2383 | break; |
2384 | |
2385 | if (IsDarwin && !NParameters) { |
2386 | switch (Body[Pos + 1]) { |
2387 | // $$ => $ |
2388 | case '$': |
2389 | OS << '$'; |
2390 | break; |
2391 | |
2392 | // $n => number of arguments |
2393 | case 'n': |
2394 | OS << A.size(); |
2395 | break; |
2396 | |
2397 | // $[0-9] => argument |
2398 | default: { |
2399 | // Missing arguments are ignored. |
2400 | unsigned Index = Body[Pos + 1] - '0'; |
2401 | if (Index >= A.size()) |
2402 | break; |
2403 | |
2404 | // Otherwise substitute with the token values, with spaces eliminated. |
2405 | for (const AsmToken &Token : A[Index]) |
2406 | OS << Token.getString(); |
2407 | break; |
2408 | } |
2409 | } |
2410 | Pos += 2; |
2411 | } else { |
2412 | unsigned I = Pos + 1; |
2413 | |
2414 | // Check for the \@ pseudo-variable. |
2415 | if (EnableAtPseudoVariable && Body[I] == '@' && I + 1 != End) |
2416 | ++I; |
2417 | else |
2418 | while (isIdentifierChar(Body[I]) && I + 1 != End) |
2419 | ++I; |
2420 | |
2421 | const char *Begin = Body.data() + Pos + 1; |
2422 | StringRef Argument(Begin, I - (Pos + 1)); |
2423 | unsigned Index = 0; |
2424 | |
2425 | if (Argument == "@") { |
2426 | OS << NumOfMacroInstantiations; |
2427 | Pos += 2; |
2428 | } else { |
2429 | for (; Index < NParameters; ++Index) |
2430 | if (Parameters[Index].Name == Argument) |
2431 | break; |
2432 | |
2433 | if (Index == NParameters) { |
2434 | if (Body[Pos + 1] == '(' && Body[Pos + 2] == ')') |
2435 | Pos += 3; |
2436 | else { |
2437 | OS << '\\' << Argument; |
2438 | Pos = I; |
2439 | } |
2440 | } else { |
2441 | bool VarargParameter = HasVararg && Index == (NParameters - 1); |
2442 | for (const AsmToken &Token : A[Index]) |
2443 | // For altmacro mode, you can write '%expr'. |
2444 | // The prefix '%' evaluates the expression 'expr' |
2445 | // and uses the result as a string (e.g. replace %(1+2) with the |
2446 | // string "3"). |
2447 | // Here, we identify the integer token which is the result of the |
2448 | // absolute expression evaluation and replace it with its string |
2449 | // representation. |
2450 | if (AltMacroMode && Token.getString().front() == '%' && |
2451 | Token.is(AsmToken::Integer)) |
2452 | // Emit an integer value to the buffer. |
2453 | OS << Token.getIntVal(); |
2454 | // Only Token that was validated as a string and begins with '<' |
2455 | // is considered altMacroString!!! |
2456 | else if (AltMacroMode && Token.getString().front() == '<' && |
2457 | Token.is(AsmToken::String)) { |
2458 | OS << altMacroString(Token.getStringContents()); |
2459 | } |
2460 | // We expect no quotes around the string's contents when |
2461 | // parsing for varargs. |
2462 | else if (Token.isNot(AsmToken::String) || VarargParameter) |
2463 | OS << Token.getString(); |
2464 | else |
2465 | OS << Token.getStringContents(); |
2466 | |
2467 | Pos += 1 + Argument.size(); |
2468 | } |
2469 | } |
2470 | } |
2471 | // Update the scan point. |
2472 | Body = Body.substr(Pos); |
2473 | } |
2474 | |
2475 | return false; |
2476 | } |
2477 | |
2478 | MacroInstantiation::MacroInstantiation(SMLoc IL, int EB, SMLoc EL, |
2479 | size_t CondStackDepth) |
2480 | : InstantiationLoc(IL), ExitBuffer(EB), ExitLoc(EL), |
2481 | CondStackDepth(CondStackDepth) {} |
2482 | |
2483 | static bool isOperator(AsmToken::TokenKind kind) { |
2484 | switch (kind) { |
2485 | default: |
2486 | return false; |
2487 | case AsmToken::Plus: |
2488 | case AsmToken::Minus: |
2489 | case AsmToken::Tilde: |
2490 | case AsmToken::Slash: |
2491 | case AsmToken::Star: |
2492 | case AsmToken::Dot: |
2493 | case AsmToken::Equal: |
2494 | case AsmToken::EqualEqual: |
2495 | case AsmToken::Pipe: |
2496 | case AsmToken::PipePipe: |
2497 | case AsmToken::Caret: |
2498 | case AsmToken::Amp: |
2499 | case AsmToken::AmpAmp: |
2500 | case AsmToken::Exclaim: |
2501 | case AsmToken::ExclaimEqual: |
2502 | case AsmToken::Less: |
2503 | case AsmToken::LessEqual: |
2504 | case AsmToken::LessLess: |
2505 | case AsmToken::LessGreater: |
2506 | case AsmToken::Greater: |
2507 | case AsmToken::GreaterEqual: |
2508 | case AsmToken::GreaterGreater: |
2509 | return true; |
2510 | } |
2511 | } |
2512 | |
2513 | namespace { |
2514 | |
2515 | class AsmLexerSkipSpaceRAII { |
2516 | public: |
2517 | AsmLexerSkipSpaceRAII(AsmLexer &Lexer, bool SkipSpace) : Lexer(Lexer) { |
2518 | Lexer.setSkipSpace(SkipSpace); |
2519 | } |
2520 | |
2521 | ~AsmLexerSkipSpaceRAII() { |
2522 | Lexer.setSkipSpace(true); |
2523 | } |
2524 | |
2525 | private: |
2526 | AsmLexer &Lexer; |
2527 | }; |
2528 | |
2529 | } // end anonymous namespace |
2530 | |
2531 | bool AsmParser::parseMacroArgument(MCAsmMacroArgument &MA, bool Vararg) { |
2532 | |
2533 | if (Vararg) { |
2534 | if (Lexer.isNot(AsmToken::EndOfStatement)) { |
2535 | StringRef Str = parseStringToEndOfStatement(); |
2536 | MA.emplace_back(AsmToken::String, Str); |
2537 | } |
2538 | return false; |
2539 | } |
2540 | |
2541 | unsigned ParenLevel = 0; |
2542 | |
2543 | // Darwin doesn't use spaces to delmit arguments. |
2544 | AsmLexerSkipSpaceRAII ScopedSkipSpace(Lexer, IsDarwin); |
2545 | |
2546 | bool SpaceEaten; |
2547 | |
2548 | while (true) { |
2549 | SpaceEaten = false; |
2550 | if (Lexer.is(AsmToken::Eof) || Lexer.is(AsmToken::Equal)) |
2551 | return TokError("unexpected token in macro instantiation"); |
2552 | |
2553 | if (ParenLevel == 0) { |
2554 | |
2555 | if (Lexer.is(AsmToken::Comma)) |
2556 | break; |
2557 | |
2558 | if (Lexer.is(AsmToken::Space)) { |
2559 | SpaceEaten = true; |
2560 | Lexer.Lex(); // Eat spaces |
2561 | } |
2562 | |
2563 | // Spaces can delimit parameters, but could also be part an expression. |
2564 | // If the token after a space is an operator, add the token and the next |
2565 | // one into this argument |
2566 | if (!IsDarwin) { |
2567 | if (isOperator(Lexer.getKind())) { |
2568 | MA.push_back(getTok()); |
2569 | Lexer.Lex(); |
2570 | |
2571 | // Whitespace after an operator can be ignored. |
2572 | if (Lexer.is(AsmToken::Space)) |
2573 | Lexer.Lex(); |
2574 | |
2575 | continue; |
2576 | } |
2577 | } |
2578 | if (SpaceEaten) |
2579 | break; |
2580 | } |
2581 | |
2582 | // handleMacroEntry relies on not advancing the lexer here |
2583 | // to be able to fill in the remaining default parameter values |
2584 | if (Lexer.is(AsmToken::EndOfStatement)) |
2585 | break; |
2586 | |
2587 | // Adjust the current parentheses level. |
2588 | if (Lexer.is(AsmToken::LParen)) |
2589 | ++ParenLevel; |
2590 | else if (Lexer.is(AsmToken::RParen) && ParenLevel) |
2591 | --ParenLevel; |
2592 | |
2593 | // Append the token to the current argument list. |
2594 | MA.push_back(getTok()); |
2595 | Lexer.Lex(); |
2596 | } |
2597 | |
2598 | if (ParenLevel != 0) |
2599 | return TokError("unbalanced parentheses in macro argument"); |
2600 | return false; |
2601 | } |
2602 | |
2603 | // Parse the macro instantiation arguments. |
2604 | bool AsmParser::parseMacroArguments(const MCAsmMacro *M, |
2605 | MCAsmMacroArguments &A) { |
2606 | const unsigned NParameters = M ? M->Parameters.size() : 0; |
2607 | bool NamedParametersFound = false; |
2608 | SmallVector<SMLoc, 4> FALocs; |
2609 | |
2610 | A.resize(NParameters); |
2611 | FALocs.resize(NParameters); |
2612 | |
2613 | // Parse two kinds of macro invocations: |
2614 | // - macros defined without any parameters accept an arbitrary number of them |
2615 | // - macros defined with parameters accept at most that many of them |
2616 | bool HasVararg = NParameters ? M->Parameters.back().Vararg : false; |
2617 | for (unsigned Parameter = 0; !NParameters || Parameter < NParameters; |
2618 | ++Parameter) { |
2619 | SMLoc IDLoc = Lexer.getLoc(); |
2620 | MCAsmMacroParameter FA; |
2621 | |
2622 | if (Lexer.is(AsmToken::Identifier) && Lexer.peekTok().is(AsmToken::Equal)) { |
2623 | if (parseIdentifier(FA.Name)) |
2624 | return Error(IDLoc, "invalid argument identifier for formal argument"); |
2625 | |
2626 | if (Lexer.isNot(AsmToken::Equal)) |
2627 | return TokError("expected '=' after formal parameter identifier"); |
2628 | |
2629 | Lex(); |
2630 | |
2631 | NamedParametersFound = true; |
2632 | } |
2633 | bool Vararg = HasVararg && Parameter == (NParameters - 1); |
2634 | |
2635 | if (NamedParametersFound && FA.Name.empty()) |
2636 | return Error(IDLoc, "cannot mix positional and keyword arguments"); |
2637 | |
2638 | SMLoc StrLoc = Lexer.getLoc(); |
2639 | SMLoc EndLoc; |
2640 | if (AltMacroMode && Lexer.is(AsmToken::Percent)) { |
2641 | const MCExpr *AbsoluteExp; |
2642 | int64_t Value; |
2643 | /// Eat '%' |
2644 | Lex(); |
2645 | if (parseExpression(AbsoluteExp, EndLoc)) |
2646 | return false; |
2647 | if (!AbsoluteExp->evaluateAsAbsolute(Value, |
2648 | getStreamer().getAssemblerPtr())) |
2649 | return Error(StrLoc, "expected absolute expression"); |
2650 | const char *StrChar = StrLoc.getPointer(); |
2651 | const char *EndChar = EndLoc.getPointer(); |
2652 | AsmToken newToken(AsmToken::Integer, |
2653 | StringRef(StrChar, EndChar - StrChar), Value); |
2654 | FA.Value.push_back(newToken); |
2655 | } else if (AltMacroMode && Lexer.is(AsmToken::Less) && |
2656 | isAltmacroString(StrLoc, EndLoc)) { |
2657 | const char *StrChar = StrLoc.getPointer(); |
2658 | const char *EndChar = EndLoc.getPointer(); |
2659 | jumpToLoc(EndLoc, CurBuffer); |
2660 | /// Eat from '<' to '>' |
2661 | Lex(); |
2662 | AsmToken newToken(AsmToken::String, |
2663 | StringRef(StrChar, EndChar - StrChar)); |
2664 | FA.Value.push_back(newToken); |
2665 | } else if(parseMacroArgument(FA.Value, Vararg)) |
2666 | return true; |
2667 | |
2668 | unsigned PI = Parameter; |
2669 | if (!FA.Name.empty()) { |
2670 | unsigned FAI = 0; |
2671 | for (FAI = 0; FAI < NParameters; ++FAI) |
2672 | if (M->Parameters[FAI].Name == FA.Name) |
2673 | break; |
2674 | |
2675 | if (FAI >= NParameters) { |
2676 | assert(M && "expected macro to be defined")((M && "expected macro to be defined") ? static_cast< void> (0) : __assert_fail ("M && \"expected macro to be defined\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/MC/MCParser/AsmParser.cpp" , 2676, __PRETTY_FUNCTION__)); |
2677 | return Error(IDLoc, "parameter named '" + FA.Name + |
2678 | "' does not exist for macro '" + M->Name + "'"); |
2679 | } |
2680 | PI = FAI; |
2681 | } |
2682 | |
2683 | if (!FA.Value.empty()) { |
2684 | if (A.size() <= PI) |
2685 | A.resize(PI + 1); |
2686 | A[PI] = FA.Value; |
2687 | |
2688 | if (FALocs.size() <= PI) |
2689 | FALocs.resize(PI + 1); |
2690 | |
2691 | FALocs[PI] = Lexer.getLoc(); |
2692 | } |
2693 | |
2694 | // At the end of the statement, fill in remaining arguments that have |
2695 | // default values. If there aren't any, then the next argument is |
2696 | // required but missing |
2697 | if (Lexer.is(AsmToken::EndOfStatement)) { |
2698 | bool Failure = false; |
2699 | for (unsigned FAI = 0; FAI < NParameters; ++FAI) { |
2700 | if (A[FAI].empty()) { |
2701 | if (M->Parameters[FAI].Required) { |
2702 | Error(FALocs[FAI].isValid() ? FALocs[FAI] : Lexer.getLoc(), |
2703 | "missing value for required parameter " |
2704 | "'" + M->Parameters[FAI].Name + "' in macro '" + M->Name + "'"); |
2705 | Failure = true; |
2706 | } |
2707 | |
2708 | if (!M->Parameters[FAI].Value.empty()) |
2709 | A[FAI] = M->Parameters[FAI].Value; |
2710 | } |
2711 | } |
2712 | return Failure; |
2713 | } |
2714 | |
2715 | if (Lexer.is(AsmToken::Comma)) |
2716 | Lex(); |
2717 | } |
2718 | |
2719 | return TokError("too many positional arguments"); |
2720 | } |
2721 | |
2722 | bool AsmParser::handleMacroEntry(const MCAsmMacro *M, SMLoc NameLoc) { |
2723 | // Arbitrarily limit macro nesting depth (default matches 'as'). We can |
2724 | // eliminate this, although we should protect against infinite loops. |
2725 | unsigned MaxNestingDepth = AsmMacroMaxNestingDepth; |
2726 | if (ActiveMacros.size() == MaxNestingDepth) { |
2727 | std::ostringstream MaxNestingDepthError; |
2728 | MaxNestingDepthError << "macros cannot be nested more than " |
2729 | << MaxNestingDepth << " levels deep." |
2730 | << " Use -asm-macro-max-nesting-depth to increase " |
2731 | "this limit."; |
2732 | return TokError(MaxNestingDepthError.str()); |
2733 | } |
2734 | |
2735 | MCAsmMacroArguments A; |
2736 | if (parseMacroArguments(M, A)) |
2737 | return true; |
2738 | |
2739 | // Macro instantiation is lexical, unfortunately. We construct a new buffer |
2740 | // to hold the macro body with substitutions. |
2741 | SmallString<256> Buf; |
2742 | StringRef Body = M->Body; |
2743 | raw_svector_ostream OS(Buf); |
2744 | |
2745 | if (expandMacro(OS, Body, M->Parameters, A, true, getTok().getLoc())) |
2746 | return true; |
2747 | |
2748 | // We include the .endmacro in the buffer as our cue to exit the macro |
2749 | // instantiation. |
2750 | OS << ".endmacro\n"; |
2751 | |
2752 | std::unique_ptr<MemoryBuffer> Instantiation = |
2753 | MemoryBuffer::getMemBufferCopy(OS.str(), "<instantiation>"); |
2754 | |
2755 | // Create the macro instantiation object and add to the current macro |
2756 | // instantiation stack. |
2757 | MacroInstantiation *MI = new MacroInstantiation( |
2758 | NameLoc, CurBuffer, getTok().getLoc(), TheCondStack.size()); |
2759 | ActiveMacros.push_back(MI); |
2760 | |
2761 | ++NumOfMacroInstantiations; |
2762 | |
2763 | // Jump to the macro instantiation and prime the lexer. |
2764 | CurBuffer = SrcMgr.AddNewSourceBuffer(std::move(Instantiation), SMLoc()); |
2765 | Lexer.setBuffer(SrcMgr.getMemoryBuffer(CurBuffer)->getBuffer()); |
2766 | Lex(); |
2767 | |
2768 | return false; |
2769 | } |
2770 | |
2771 | void AsmParser::handleMacroExit() { |
2772 | // Jump to the EndOfStatement we should return to, and consume it. |
2773 | jumpToLoc(ActiveMacros.back()->ExitLoc, ActiveMacros.back()->ExitBuffer); |
2774 | Lex(); |
2775 | |
2776 | // Pop the instantiation entry. |
2777 | delete ActiveMacros.back(); |
2778 | ActiveMacros.pop_back(); |
2779 | } |
2780 | |
2781 | bool AsmParser::parseAssignment(StringRef Name, bool allow_redef, |
2782 | bool NoDeadStrip) { |
2783 | MCSymbol *Sym; |
2784 | const MCExpr *Value; |
2785 | if (MCParserUtils::parseAssignmentExpression(Name, allow_redef, *this, Sym, |
2786 | Value)) |
2787 | return true; |
2788 | |
2789 | if (!Sym) { |
2790 | // In the case where we parse an expression starting with a '.', we will |
2791 | // not generate an error, nor will we create a symbol. In this case we |
2792 | // should just return out. |
2793 | return false; |
2794 | } |
2795 | |
2796 | // Do the assignment. |
2797 | Out.EmitAssignment(Sym, Value); |
2798 | if (NoDeadStrip) |
2799 | Out.EmitSymbolAttribute(Sym, MCSA_NoDeadStrip); |
2800 | |
2801 | return false; |
2802 | } |
2803 | |
2804 | /// parseIdentifier: |
2805 | /// ::= identifier |
2806 | /// ::= string |
2807 | bool AsmParser::parseIdentifier(StringRef &Res) { |
2808 | // The assembler has relaxed rules for accepting identifiers, in particular we |
2809 | // allow things like '.globl $foo' and '.def @feat.00', which would normally be |
2810 | // separate tokens. At this level, we have already lexed so we cannot (currently) |
2811 | // handle this as a context dependent token, instead we detect adjacent tokens |
2812 | // and return the combined identifier. |
2813 | if (Lexer.is(AsmToken::Dollar) || Lexer.is(AsmToken::At)) { |
2814 | SMLoc PrefixLoc = getLexer().getLoc(); |
2815 | |
2816 | // Consume the prefix character, and check for a following identifier. |
2817 | |
2818 | AsmToken Buf[1]; |
2819 | Lexer.peekTokens(Buf, false); |
2820 | |
2821 | if (Buf[0].isNot(AsmToken::Identifier)) |
2822 | return true; |
2823 | |
2824 | // We have a '$' or '@' followed by an identifier, make sure they are adjacent. |
2825 | if (PrefixLoc.getPointer() + 1 != Buf[0].getLoc().getPointer()) |
2826 | return true; |
2827 | |
2828 | // eat $ or @ |
2829 | Lexer.Lex(); // Lexer's Lex guarantees consecutive token. |
2830 | // Construct the joined identifier and consume the token. |
2831 | Res = |
2832 | StringRef(PrefixLoc.getPointer(), getTok().getIdentifier().size() + 1); |
2833 | Lex(); // Parser Lex to maintain invariants. |
2834 | return false; |
2835 | } |
2836 | |
2837 | if (Lexer.isNot(AsmToken::Identifier) && Lexer.isNot(AsmToken::String)) |
2838 | return true; |
2839 | |
2840 | Res = getTok().getIdentifier(); |
2841 | |
2842 | Lex(); // Consume the identifier token. |
2843 | |
2844 | return false; |
2845 | } |
2846 | |
2847 | /// parseDirectiveSet: |
2848 | /// ::= .equ identifier ',' expression |
2849 | /// ::= .equiv identifier ',' expression |
2850 | /// ::= .set identifier ',' expression |
2851 | bool AsmParser::parseDirectiveSet(StringRef IDVal, bool allow_redef) { |
2852 | StringRef Name; |
2853 | if (check(parseIdentifier(Name), "expected identifier") || |
2854 | parseToken(AsmToken::Comma) || parseAssignment(Name, allow_redef, true)) |
2855 | return addErrorSuffix(" in '" + Twine(IDVal) + "' directive"); |
2856 | return false; |
2857 | } |
2858 | |
2859 | bool AsmParser::parseEscapedString(std::string &Data) { |
2860 | if (check(getTok().isNot(AsmToken::String), "expected string")) |
2861 | return true; |
2862 | |
2863 | Data = ""; |
2864 | StringRef Str = getTok().getStringContents(); |
2865 | for (unsigned i = 0, e = Str.size(); i != e; ++i) { |
2866 | if (Str[i] != '\\') { |
2867 | Data += Str[i]; |
2868 | continue; |
2869 | } |
2870 | |
2871 | // Recognize escaped characters. Note that this escape semantics currently |
2872 | // loosely follows Darwin 'as'. Notably, it doesn't support hex escapes. |
2873 | ++i; |
2874 | if (i == e) |
2875 | return TokError("unexpected backslash at end of string"); |
2876 | |
2877 | // Recognize octal sequences. |
2878 | if ((unsigned)(Str[i] - '0') <= 7) { |
2879 | // Consume up to three octal characters. |
2880 | unsigned Value = Str[i] - '0'; |
2881 | |
2882 | if (i + 1 != e && ((unsigned)(Str[i + 1] - '0')) <= 7) { |
2883 | ++i; |
2884 | Value = Value * 8 + (Str[i] - '0'); |
2885 | |
2886 | if (i + 1 != e && ((unsigned)(Str[i + 1] - '0')) <= 7) { |
2887 | ++i; |
2888 | Value = Value * 8 + (Str[i] - '0'); |
2889 | } |
2890 | } |
2891 | |
2892 | if (Value > 255) |
2893 | return TokError("invalid octal escape sequence (out of range)"); |
2894 | |
2895 | Data += (unsigned char)Value; |
2896 | continue; |
2897 | } |
2898 | |
2899 | // Otherwise recognize individual escapes. |
2900 | switch (Str[i]) { |
2901 | default: |
2902 | // Just reject invalid escape sequences for now. |
2903 | return TokError("invalid escape sequence (unrecognized character)"); |
2904 | |
2905 | case 'b': Data += '\b'; break; |
2906 | case 'f': Data += '\f'; break; |
2907 | case 'n': Data += '\n'; break; |
2908 | case 'r': Data += '\r'; break; |
2909 | case 't': Data += '\t'; break; |
2910 | case '"': Data += '"'; break; |
2911 | case '\\': Data += '\\'; break; |
2912 | } |
2913 | } |
2914 | |
2915 | Lex(); |
2916 | return false; |
2917 | } |
2918 | |
2919 | /// parseDirectiveAscii: |
2920 | /// ::= ( .ascii | .asciz | .string ) [ "string" ( , "string" )* ] |
2921 | bool AsmParser::parseDirectiveAscii(StringRef IDVal, bool ZeroTerminated) { |
2922 | auto parseOp = [&]() -> bool { |
2923 | std::string Data; |
2924 | if (checkForValidSection() || parseEscapedString(Data)) |
2925 | return true; |
2926 | getStreamer().EmitBytes(Data); |
2927 | if (ZeroTerminated) |
2928 | getStreamer().EmitBytes(StringRef("\0", 1)); |
2929 | return false; |
2930 | }; |
2931 | |
2932 | if (parseMany(parseOp)) |
2933 | return addErrorSuffix(" in '" + Twine(IDVal) + "' directive"); |
2934 | return false; |
2935 | } |
2936 | |
2937 | /// parseDirectiveReloc |
2938 | /// ::= .reloc expression , identifier [ , expression ] |
2939 | bool AsmParser::parseDirectiveReloc(SMLoc DirectiveLoc) { |
2940 | const MCExpr *Offset; |
2941 | const MCExpr *Expr = nullptr; |
2942 | int64_t OffsetValue; |
2943 | SMLoc OffsetLoc = Lexer.getTok().getLoc(); |
2944 | |
2945 | if (parseExpression(Offset)) |
2946 | return true; |
2947 | |
2948 | if ((Offset->evaluateAsAbsolute(OffsetValue, |
2949 | getStreamer().getAssemblerPtr()) && |
2950 | check(OffsetValue < 0, OffsetLoc, "expression is negative")) || |
2951 | (check(Offset->getKind() != llvm::MCExpr::Constant && |
2952 | Offset->getKind() != llvm::MCExpr::SymbolRef, |
2953 | OffsetLoc, "expected non-negative number or a label")) || |
2954 | (parseToken(AsmToken::Comma, "expected comma") || |
2955 | check(getTok().isNot(AsmToken::Identifier), "expected relocation name"))) |
2956 | return true; |
2957 | |
2958 | SMLoc NameLoc = Lexer.getTok().getLoc(); |
2959 | StringRef Name = Lexer.getTok().getIdentifier(); |
2960 | Lex(); |
2961 | |
2962 | if (Lexer.is(AsmToken::Comma)) { |
2963 | Lex(); |
2964 | SMLoc ExprLoc = Lexer.getLoc(); |
2965 | if (parseExpression(Expr)) |
2966 | return true; |
2967 | |
2968 | MCValue Value; |
2969 | if (!Expr->evaluateAsRelocatable(Value, nullptr, nullptr)) |
2970 | return Error(ExprLoc, "expression must be relocatable"); |
2971 | } |
2972 | |
2973 | if (parseToken(AsmToken::EndOfStatement, |
2974 | "unexpected token in .reloc directive")) |
2975 | return true; |
2976 | |
2977 | const MCTargetAsmParser &MCT = getTargetParser(); |
2978 | const MCSubtargetInfo &STI = MCT.getSTI(); |
2979 | if (getStreamer().EmitRelocDirective(*Offset, Name, Expr, DirectiveLoc, STI)) |
2980 | return Error(NameLoc, "unknown relocation name"); |
2981 | |
2982 | return false; |
2983 | } |
2984 | |
2985 | /// parseDirectiveValue |
2986 | /// ::= (.byte | .short | ... ) [ expression (, expression)* ] |
2987 | bool AsmParser::parseDirectiveValue(StringRef IDVal, unsigned Size) { |
2988 | auto parseOp = [&]() -> bool { |
2989 | const MCExpr *Value; |
2990 | SMLoc ExprLoc = getLexer().getLoc(); |
2991 | if (checkForValidSection() || parseExpression(Value)) |
2992 | return true; |
2993 | // Special case constant expressions to match code generator. |
2994 | if (const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Value)) { |
2995 | assert(Size <= 8 && "Invalid size")((Size <= 8 && "Invalid size") ? static_cast<void > (0) : __assert_fail ("Size <= 8 && \"Invalid size\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/MC/MCParser/AsmParser.cpp" , 2995, __PRETTY_FUNCTION__)); |
2996 | uint64_t IntValue = MCE->getValue(); |
2997 | if (!isUIntN(8 * Size, IntValue) && !isIntN(8 * Size, IntValue)) |
2998 | return Error(ExprLoc, "out of range literal value"); |
2999 | getStreamer().EmitIntValue(IntValue, Size); |
3000 | } else |
3001 | getStreamer().EmitValue(Value, Size, ExprLoc); |
3002 | return false; |
3003 | }; |
3004 | |
3005 | if (parseMany(parseOp)) |
3006 | return addErrorSuffix(" in '" + Twine(IDVal) + "' directive"); |
3007 | return false; |
3008 | } |
3009 | |
3010 | static bool parseHexOcta(AsmParser &Asm, uint64_t &hi, uint64_t &lo) { |
3011 | if (Asm.getTok().isNot(AsmToken::Integer) && |
3012 | Asm.getTok().isNot(AsmToken::BigNum)) |
3013 | return Asm.TokError("unknown token in expression"); |
3014 | SMLoc ExprLoc = Asm.getTok().getLoc(); |
3015 | APInt IntValue = Asm.getTok().getAPIntVal(); |
3016 | Asm.Lex(); |
3017 | if (!IntValue.isIntN(128)) |
3018 | return Asm.Error(ExprLoc, "out of range literal value"); |
3019 | if (!IntValue.isIntN(64)) { |
3020 | hi = IntValue.getHiBits(IntValue.getBitWidth() - 64).getZExtValue(); |
3021 | lo = IntValue.getLoBits(64).getZExtValue(); |
3022 | } else { |
3023 | hi = 0; |
3024 | lo = IntValue.getZExtValue(); |
3025 | } |
3026 | return false; |
3027 | } |
3028 | |
3029 | /// ParseDirectiveOctaValue |
3030 | /// ::= .octa [ hexconstant (, hexconstant)* ] |
3031 | |
3032 | bool AsmParser::parseDirectiveOctaValue(StringRef IDVal) { |
3033 | auto parseOp = [&]() -> bool { |
3034 | if (checkForValidSection()) |
3035 | return true; |
3036 | uint64_t hi, lo; |
3037 | if (parseHexOcta(*this, hi, lo)) |
3038 | return true; |
3039 | if (MAI.isLittleEndian()) { |
3040 | getStreamer().EmitIntValue(lo, 8); |
3041 | getStreamer().EmitIntValue(hi, 8); |
3042 | } else { |
3043 | getStreamer().EmitIntValue(hi, 8); |
3044 | getStreamer().EmitIntValue(lo, 8); |
3045 | } |
3046 | return false; |
3047 | }; |
3048 | |
3049 | if (parseMany(parseOp)) |
3050 | return addErrorSuffix(" in '" + Twine(IDVal) + "' directive"); |
3051 | return false; |
3052 | } |
3053 | |
3054 | bool AsmParser::parseRealValue(const fltSemantics &Semantics, APInt &Res) { |
3055 | // We don't truly support arithmetic on floating point expressions, so we |
3056 | // have to manually parse unary prefixes. |
3057 | bool IsNeg = false; |
3058 | if (getLexer().is(AsmToken::Minus)) { |
3059 | Lexer.Lex(); |
3060 | IsNeg = true; |
3061 | } else if (getLexer().is(AsmToken::Plus)) |
3062 | Lexer.Lex(); |
3063 | |
3064 | if (Lexer.is(AsmToken::Error)) |
3065 | return TokError(Lexer.getErr()); |
3066 | if (Lexer.isNot(AsmToken::Integer) && Lexer.isNot(AsmToken::Real) && |
3067 | Lexer.isNot(AsmToken::Identifier)) |
3068 | return TokError("unexpected token in directive"); |
3069 | |
3070 | // Convert to an APFloat. |
3071 | APFloat Value(Semantics); |
3072 | StringRef IDVal = getTok().getString(); |
3073 | if (getLexer().is(AsmToken::Identifier)) { |
3074 | if (!IDVal.compare_lower("infinity") || !IDVal.compare_lower("inf")) |
3075 | Value = APFloat::getInf(Semantics); |
3076 | else if (!IDVal.compare_lower("nan")) |
3077 | Value = APFloat::getNaN(Semantics, false, ~0); |
3078 | else |
3079 | return TokError("invalid floating point literal"); |
3080 | } else if (Value.convertFromString(IDVal, APFloat::rmNearestTiesToEven) == |
3081 | APFloat::opInvalidOp) |
3082 | return TokError("invalid floating point literal"); |
3083 | if (IsNeg) |
3084 | Value.changeSign(); |
3085 | |
3086 | // Consume the numeric token. |
3087 | Lex(); |
3088 | |
3089 | Res = Value.bitcastToAPInt(); |
3090 | |
3091 | return false; |
3092 | } |
3093 | |
3094 | /// parseDirectiveRealValue |
3095 | /// ::= (.single | .double) [ expression (, expression)* ] |
3096 | bool AsmParser::parseDirectiveRealValue(StringRef IDVal, |
3097 | const fltSemantics &Semantics) { |
3098 | auto parseOp = [&]() -> bool { |
3099 | APInt AsInt; |
3100 | if (checkForValidSection() || parseRealValue(Semantics, AsInt)) |
3101 | return true; |
3102 | getStreamer().EmitIntValue(AsInt.getLimitedValue(), |
3103 | AsInt.getBitWidth() / 8); |
3104 | return false; |
3105 | }; |
3106 | |
3107 | if (parseMany(parseOp)) |
3108 | return addErrorSuffix(" in '" + Twine(IDVal) + "' directive"); |
3109 | return false; |
3110 | } |
3111 | |
3112 | /// parseDirectiveZero |
3113 | /// ::= .zero expression |
3114 | bool AsmParser::parseDirectiveZero() { |
3115 | SMLoc NumBytesLoc = Lexer.getLoc(); |
3116 | const MCExpr *NumBytes; |
3117 | if (checkForValidSection() || parseExpression(NumBytes)) |
3118 | return true; |
3119 | |
3120 | int64_t Val = 0; |
3121 | if (getLexer().is(AsmToken::Comma)) { |
3122 | Lex(); |
3123 | if (parseAbsoluteExpression(Val)) |
3124 | return true; |
3125 | } |
3126 | |
3127 | if (parseToken(AsmToken::EndOfStatement, |
3128 | "unexpected token in '.zero' directive")) |
3129 | return true; |
3130 | getStreamer().emitFill(*NumBytes, Val, NumBytesLoc); |
3131 | |
3132 | return false; |
3133 | } |
3134 | |
3135 | /// parseDirectiveFill |
3136 | /// ::= .fill expression [ , expression [ , expression ] ] |
3137 | bool AsmParser::parseDirectiveFill() { |
3138 | SMLoc NumValuesLoc = Lexer.getLoc(); |
3139 | const MCExpr *NumValues; |
3140 | if (checkForValidSection() || parseExpression(NumValues)) |
3141 | return true; |
3142 | |
3143 | int64_t FillSize = 1; |
3144 | int64_t FillExpr = 0; |
3145 | |
3146 | SMLoc SizeLoc, ExprLoc; |
3147 | |
3148 | if (parseOptionalToken(AsmToken::Comma)) { |
3149 | SizeLoc = getTok().getLoc(); |
3150 | if (parseAbsoluteExpression(FillSize)) |
3151 | return true; |
3152 | if (parseOptionalToken(AsmToken::Comma)) { |
3153 | ExprLoc = getTok().getLoc(); |
3154 | if (parseAbsoluteExpression(FillExpr)) |
3155 | return true; |
3156 | } |
3157 | } |
3158 | if (parseToken(AsmToken::EndOfStatement, |
3159 | "unexpected token in '.fill' directive")) |
3160 | return true; |
3161 | |
3162 | if (FillSize < 0) { |
3163 | Warning(SizeLoc, "'.fill' directive with negative size has no effect"); |
3164 | return false; |
3165 | } |
3166 | if (FillSize > 8) { |
3167 | Warning(SizeLoc, "'.fill' directive with size greater than 8 has been truncated to 8"); |
3168 | FillSize = 8; |
3169 | } |
3170 | |
3171 | if (!isUInt<32>(FillExpr) && FillSize > 4) |
3172 | Warning(ExprLoc, "'.fill' directive pattern has been truncated to 32-bits"); |
3173 | |
3174 | getStreamer().emitFill(*NumValues, FillSize, FillExpr, NumValuesLoc); |
3175 | |
3176 | return false; |
3177 | } |
3178 | |
3179 | /// parseDirectiveOrg |
3180 | /// ::= .org expression [ , expression ] |
3181 | bool AsmParser::parseDirectiveOrg() { |
3182 | const MCExpr *Offset; |
3183 | SMLoc OffsetLoc = Lexer.getLoc(); |
3184 | if (checkForValidSection() || parseExpression(Offset)) |
3185 | return true; |
3186 | |
3187 | // Parse optional fill expression. |
3188 | int64_t FillExpr = 0; |
3189 | if (parseOptionalToken(AsmToken::Comma)) |
3190 | if (parseAbsoluteExpression(FillExpr)) |
3191 | return addErrorSuffix(" in '.org' directive"); |
3192 | if (parseToken(AsmToken::EndOfStatement)) |
3193 | return addErrorSuffix(" in '.org' directive"); |
3194 | |
3195 | getStreamer().emitValueToOffset(Offset, FillExpr, OffsetLoc); |
3196 | return false; |
3197 | } |
3198 | |
3199 | /// parseDirectiveAlign |
3200 | /// ::= {.align, ...} expression [ , expression [ , expression ]] |
3201 | bool AsmParser::parseDirectiveAlign(bool IsPow2, unsigned ValueSize) { |
3202 | SMLoc AlignmentLoc = getLexer().getLoc(); |
3203 | int64_t Alignment; |
3204 | SMLoc MaxBytesLoc; |
3205 | bool HasFillExpr = false; |
3206 | int64_t FillExpr = 0; |
3207 | int64_t MaxBytesToFill = 0; |
3208 | |
3209 | auto parseAlign = [&]() -> bool { |
3210 | if (parseAbsoluteExpression(Alignment)) |
3211 | return true; |
3212 | if (parseOptionalToken(AsmToken::Comma)) { |
3213 | // The fill expression can be omitted while specifying a maximum number of |
3214 | // alignment bytes, e.g: |
3215 | // .align 3,,4 |
3216 | if (getTok().isNot(AsmToken::Comma)) { |
3217 | HasFillExpr = true; |
3218 | if (parseAbsoluteExpression(FillExpr)) |
3219 | return true; |
3220 | } |
3221 | if (parseOptionalToken(AsmToken::Comma)) |
3222 | if (parseTokenLoc(MaxBytesLoc) || |
3223 | parseAbsoluteExpression(MaxBytesToFill)) |
3224 | return true; |
3225 | } |
3226 | return parseToken(AsmToken::EndOfStatement); |
3227 | }; |
3228 | |
3229 | if (checkForValidSection()) |
3230 | return addErrorSuffix(" in directive"); |
3231 | // Ignore empty '.p2align' directives for GNU-as compatibility |
3232 | if (IsPow2 && (ValueSize == 1) && getTok().is(AsmToken::EndOfStatement)) { |
3233 | Warning(AlignmentLoc, "p2align directive with no operand(s) is ignored"); |
3234 | return parseToken(AsmToken::EndOfStatement); |
3235 | } |
3236 | if (parseAlign()) |
3237 | return addErrorSuffix(" in directive"); |
3238 | |
3239 | // Always emit an alignment here even if we thrown an error. |
3240 | bool ReturnVal = false; |
3241 | |
3242 | // Compute alignment in bytes. |
3243 | if (IsPow2) { |
3244 | // FIXME: Diagnose overflow. |
3245 | if (Alignment >= 32) { |
3246 | ReturnVal |= Error(AlignmentLoc, "invalid alignment value"); |
3247 | Alignment = 31; |
3248 | } |
3249 | |
3250 | Alignment = 1ULL << Alignment; |
3251 | } else { |
3252 | // Reject alignments that aren't either a power of two or zero, |
3253 | // for gas compatibility. Alignment of zero is silently rounded |
3254 | // up to one. |
3255 | if (Alignment == 0) |
3256 | Alignment = 1; |
3257 | if (!isPowerOf2_64(Alignment)) |
3258 | ReturnVal |= Error(AlignmentLoc, "alignment must be a power of 2"); |
3259 | } |
3260 | |
3261 | // Diagnose non-sensical max bytes to align. |
3262 | if (MaxBytesLoc.isValid()) { |
3263 | if (MaxBytesToFill < 1) { |
3264 | ReturnVal |= Error(MaxBytesLoc, |
3265 | "alignment directive can never be satisfied in this " |
3266 | "many bytes, ignoring maximum bytes expression"); |
3267 | MaxBytesToFill = 0; |
3268 | } |
3269 | |
3270 | if (MaxBytesToFill >= Alignment) { |
3271 | Warning(MaxBytesLoc, "maximum bytes expression exceeds alignment and " |
3272 | "has no effect"); |
3273 | MaxBytesToFill = 0; |
3274 | } |
3275 | } |
3276 | |
3277 | // Check whether we should use optimal code alignment for this .align |
3278 | // directive. |
3279 | const MCSection *Section = getStreamer().getCurrentSectionOnly(); |
3280 | assert(Section && "must have section to emit alignment")((Section && "must have section to emit alignment") ? static_cast<void> (0) : __assert_fail ("Section && \"must have section to emit alignment\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/MC/MCParser/AsmParser.cpp" , 3280, __PRETTY_FUNCTION__)); |
3281 | bool UseCodeAlign = Section->UseCodeAlign(); |
3282 | if ((!HasFillExpr || Lexer.getMAI().getTextAlignFillValue() == FillExpr) && |
3283 | ValueSize == 1 && UseCodeAlign) { |
3284 | getStreamer().EmitCodeAlignment(Alignment, MaxBytesToFill); |
3285 | } else { |
3286 | // FIXME: Target specific behavior about how the "extra" bytes are filled. |
3287 | getStreamer().EmitValueToAlignment(Alignment, FillExpr, ValueSize, |
3288 | MaxBytesToFill); |
3289 | } |
3290 | |
3291 | return ReturnVal; |
3292 | } |
3293 | |
3294 | /// parseDirectiveFile |
3295 | /// ::= .file filename |
3296 | /// ::= .file number [directory] filename [md5 checksum] [source source-text] |
3297 | bool AsmParser::parseDirectiveFile(SMLoc DirectiveLoc) { |
3298 | // FIXME: I'm not sure what this is. |
3299 | int64_t FileNumber = -1; |
3300 | if (getLexer().is(AsmToken::Integer)) { |
3301 | FileNumber = getTok().getIntVal(); |
3302 | Lex(); |
3303 | |
3304 | if (FileNumber < 0) |
3305 | return TokError("negative file number"); |
3306 | } |
3307 | |
3308 | std::string Path; |
3309 | |
3310 | // Usually the directory and filename together, otherwise just the directory. |
3311 | // Allow the strings to have escaped octal character sequence. |
3312 | if (check(getTok().isNot(AsmToken::String), |
3313 | "unexpected token in '.file' directive") || |
3314 | parseEscapedString(Path)) |
3315 | return true; |
3316 | |
3317 | StringRef Directory; |
3318 | StringRef Filename; |
3319 | std::string FilenameData; |
3320 | if (getLexer().is(AsmToken::String)) { |
3321 | if (check(FileNumber == -1, |
3322 | "explicit path specified, but no file number") || |
3323 | parseEscapedString(FilenameData)) |
3324 | return true; |
3325 | Filename = FilenameData; |
3326 | Directory = Path; |
3327 | } else { |
3328 | Filename = Path; |
3329 | } |
3330 | |
3331 | uint64_t MD5Hi, MD5Lo; |
3332 | bool HasMD5 = false; |
3333 | |
3334 | Optional<StringRef> Source; |
3335 | bool HasSource = false; |
3336 | std::string SourceString; |
3337 | |
3338 | while (!parseOptionalToken(AsmToken::EndOfStatement)) { |
3339 | StringRef Keyword; |
3340 | if (check(getTok().isNot(AsmToken::Identifier), |
3341 | "unexpected token in '.file' directive") || |
3342 | parseIdentifier(Keyword)) |
3343 | return true; |
3344 | if (Keyword == "md5") { |
3345 | HasMD5 = true; |
3346 | if (check(FileNumber == -1, |
3347 | "MD5 checksum specified, but no file number") || |
3348 | parseHexOcta(*this, MD5Hi, MD5Lo)) |
3349 | return true; |
3350 | } else if (Keyword == "source") { |
3351 | HasSource = true; |
3352 | if (check(FileNumber == -1, |
3353 | "source specified, but no file number") || |
3354 | check(getTok().isNot(AsmToken::String), |
3355 | "unexpected token in '.file' directive") || |
3356 | parseEscapedString(SourceString)) |
3357 | return true; |
3358 | } else { |
3359 | return TokError("unexpected token in '.file' directive"); |
3360 | } |
3361 | } |
3362 | |
3363 | if (FileNumber == -1) { |
3364 | if (!getContext().getAsmInfo()->hasSingleParameterDotFile()) |
3365 | return Error(DirectiveLoc, |
3366 | "target does not support '.file' without a number"); |
3367 | getStreamer().EmitFileDirective(Filename); |
3368 | } else { |
3369 | // In case there is a -g option as well as debug info from directive .file, |
3370 | // we turn off the -g option, directly use the existing debug info instead. |
3371 | // Also reset any implicit ".file 0" for the assembler source. |
3372 | if (Ctx.getGenDwarfForAssembly()) { |
3373 | Ctx.getMCDwarfLineTable(0).resetRootFile(); |
3374 | Ctx.setGenDwarfForAssembly(false); |
3375 | } |
3376 | |
3377 | MD5::MD5Result *CKMem = nullptr; |
3378 | if (HasMD5) { |
3379 | CKMem = (MD5::MD5Result *)Ctx.allocate(sizeof(MD5::MD5Result), 1); |
3380 | for (unsigned i = 0; i != 8; ++i) { |
3381 | CKMem->Bytes[i] = uint8_t(MD5Hi >> ((7 - i) * 8)); |
3382 | CKMem->Bytes[i + 8] = uint8_t(MD5Lo >> ((7 - i) * 8)); |
3383 | } |
3384 | } |
3385 | if (HasSource) { |
3386 | char *SourceBuf = static_cast<char *>(Ctx.allocate(SourceString.size())); |
3387 | memcpy(SourceBuf, SourceString.data(), SourceString.size()); |
3388 | Source = StringRef(SourceBuf, SourceString.size()); |
3389 | } |
3390 | if (FileNumber == 0) { |
3391 | if (Ctx.getDwarfVersion() < 5) |
3392 | return Warning(DirectiveLoc, "file 0 not supported prior to DWARF-5"); |
3393 | getStreamer().emitDwarfFile0Directive(Directory, Filename, CKMem, Source); |
3394 | } else { |
3395 | Expected<unsigned> FileNumOrErr = getStreamer().tryEmitDwarfFileDirective( |
3396 | FileNumber, Directory, Filename, CKMem, Source); |
3397 | if (!FileNumOrErr) |
3398 | return Error(DirectiveLoc, toString(FileNumOrErr.takeError())); |
3399 | FileNumber = FileNumOrErr.get(); |
Value stored to 'FileNumber' is never read | |
3400 | } |
3401 | // Alert the user if there are some .file directives with MD5 and some not. |
3402 | // But only do that once. |
3403 | if (!ReportedInconsistentMD5 && !Ctx.isDwarfMD5UsageConsistent(0)) { |
3404 | ReportedInconsistentMD5 = true; |
3405 | return Warning(DirectiveLoc, "inconsistent use of MD5 checksums"); |
3406 | } |
3407 | } |
3408 | |
3409 | return false; |
3410 | } |
3411 | |
3412 | /// parseDirectiveLine |
3413 | /// ::= .line [number] |
3414 | bool AsmParser::parseDirectiveLine() { |
3415 | int64_t LineNumber; |
3416 | if (getLexer().is(AsmToken::Integer)) { |
3417 | if (parseIntToken(LineNumber, "unexpected token in '.line' directive")) |
3418 | return true; |
3419 | (void)LineNumber; |
3420 | // FIXME: Do something with the .line. |
3421 | } |
3422 | if (parseToken(AsmToken::EndOfStatement, |
3423 | "unexpected token in '.line' directive")) |
3424 | return true; |
3425 | |
3426 | return false; |
3427 | } |
3428 | |
3429 | /// parseDirectiveLoc |
3430 | /// ::= .loc FileNumber [LineNumber] [ColumnPos] [basic_block] [prologue_end] |
3431 | /// [epilogue_begin] [is_stmt VALUE] [isa VALUE] |
3432 | /// The first number is a file number, must have been previously assigned with |
3433 | /// a .file directive, the second number is the line number and optionally the |
3434 | /// third number is a column position (zero if not specified). The remaining |
3435 | /// optional items are .loc sub-directives. |
3436 | bool AsmParser::parseDirectiveLoc() { |
3437 | int64_t FileNumber = 0, LineNumber = 0; |
3438 | SMLoc Loc = getTok().getLoc(); |
3439 | if (parseIntToken(FileNumber, "unexpected token in '.loc' directive") || |
3440 | check(FileNumber < 1 && Ctx.getDwarfVersion() < 5, Loc, |
3441 | "file number less than one in '.loc' directive") || |
3442 | check(!getContext().isValidDwarfFileNumber(FileNumber), Loc, |
3443 | "unassigned file number in '.loc' directive")) |
3444 | return true; |
3445 | |
3446 | // optional |
3447 | if (getLexer().is(AsmToken::Integer)) { |
3448 | LineNumber = getTok().getIntVal(); |
3449 | if (LineNumber < 0) |
3450 | return TokError("line number less than zero in '.loc' directive"); |
3451 | Lex(); |
3452 | } |
3453 | |
3454 | int64_t ColumnPos = 0; |
3455 | if (getLexer().is(AsmToken::Integer)) { |
3456 | ColumnPos = getTok().getIntVal(); |
3457 | if (ColumnPos < 0) |
3458 | return TokError("column position less than zero in '.loc' directive"); |
3459 | Lex(); |
3460 | } |
3461 | |
3462 | unsigned Flags = DWARF2_LINE_DEFAULT_IS_STMT1 ? DWARF2_FLAG_IS_STMT(1 << 0) : 0; |
3463 | unsigned Isa = 0; |
3464 | int64_t Discriminator = 0; |
3465 | |
3466 | auto parseLocOp = [&]() -> bool { |
3467 | StringRef Name; |
3468 | SMLoc Loc = getTok().getLoc(); |
3469 | if (parseIdentifier(Name)) |
3470 | return TokError("unexpected token in '.loc' directive"); |
3471 | |
3472 | if (Name == "basic_block") |
3473 | Flags |= DWARF2_FLAG_BASIC_BLOCK(1 << 1); |
3474 | else if (Name == "prologue_end") |
3475 | Flags |= DWARF2_FLAG_PROLOGUE_END(1 << 2); |
3476 | else if (Name == "epilogue_begin") |
3477 | Flags |= DWARF2_FLAG_EPILOGUE_BEGIN(1 << 3); |
3478 | else if (Name == "is_stmt") { |
3479 | Loc = getTok().getLoc(); |
3480 | const MCExpr *Value; |
3481 | if (parseExpression(Value)) |
3482 | return true; |
3483 | // The expression must be the constant 0 or 1. |
3484 | if (const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Value)) { |
3485 | int Value = MCE->getValue(); |
3486 | if (Value == 0) |
3487 | Flags &= ~DWARF2_FLAG_IS_STMT(1 << 0); |
3488 | else if (Value == 1) |
3489 | Flags |= DWARF2_FLAG_IS_STMT(1 << 0); |
3490 | else |
3491 | return Error(Loc, "is_stmt value not 0 or 1"); |
3492 | } else { |
3493 | return Error(Loc, "is_stmt value not the constant value of 0 or 1"); |
3494 | } |
3495 | } else if (Name == "isa") { |
3496 | Loc = getTok().getLoc(); |
3497 | const MCExpr *Value; |
3498 | if (parseExpression(Value)) |
3499 | return true; |
3500 | // The expression must be a constant greater or equal to 0. |
3501 | if (const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Value)) { |
3502 | int Value = MCE->getValue(); |
3503 | if (Value < 0) |
3504 | return Error(Loc, "isa number less than zero"); |
3505 | Isa = Value; |
3506 | } else { |
3507 | return Error(Loc, "isa number not a constant value"); |
3508 | } |
3509 | } else if (Name == "discriminator") { |
3510 | if (parseAbsoluteExpression(Discriminator)) |
3511 | return true; |
3512 | } else { |
3513 | return Error(Loc, "unknown sub-directive in '.loc' directive"); |
3514 | } |
3515 | return false; |
3516 | }; |
3517 | |
3518 | if (parseMany(parseLocOp, false /*hasComma*/)) |
3519 | return true; |
3520 | |
3521 | getStreamer().EmitDwarfLocDirective(FileNumber, LineNumber, ColumnPos, Flags, |
3522 | Isa, Discriminator, StringRef()); |
3523 | |
3524 | return false; |
3525 | } |
3526 | |
3527 | /// parseDirectiveStabs |
3528 | /// ::= .stabs string, number, number, number |
3529 | bool AsmParser::parseDirectiveStabs() { |
3530 | return TokError("unsupported directive '.stabs'"); |
3531 | } |
3532 | |
3533 | /// parseDirectiveCVFile |
3534 | /// ::= .cv_file number filename [checksum] [checksumkind] |
3535 | bool AsmParser::parseDirectiveCVFile() { |
3536 | SMLoc FileNumberLoc = getTok().getLoc(); |
3537 | int64_t FileNumber; |
3538 | std::string Filename; |
3539 | std::string Checksum; |
3540 | int64_t ChecksumKind = 0; |
3541 | |
3542 | if (parseIntToken(FileNumber, |
3543 | "expected file number in '.cv_file' directive") || |
3544 | check(FileNumber < 1, FileNumberLoc, "file number less than one") || |
3545 | check(getTok().isNot(AsmToken::String), |
3546 | "unexpected token in '.cv_file' directive") || |
3547 | parseEscapedString(Filename)) |
3548 | return true; |
3549 | if (!parseOptionalToken(AsmToken::EndOfStatement)) { |
3550 | if (check(getTok().isNot(AsmToken::String), |
3551 | "unexpected token in '.cv_file' directive") || |
3552 | parseEscapedString(Checksum) || |
3553 | parseIntToken(ChecksumKind, |
3554 | "expected checksum kind in '.cv_file' directive") || |
3555 | parseToken(AsmToken::EndOfStatement, |
3556 | "unexpected token in '.cv_file' directive")) |
3557 | return true; |
3558 | } |
3559 | |
3560 | Checksum = fromHex(Checksum); |
3561 | void *CKMem = Ctx.allocate(Checksum.size(), 1); |
3562 | memcpy(CKMem, Checksum.data(), Checksum.size()); |
3563 | ArrayRef<uint8_t> ChecksumAsBytes(reinterpret_cast<const uint8_t *>(CKMem), |
3564 | Checksum.size()); |
3565 | |
3566 | if (!getStreamer().EmitCVFileDirective(FileNumber, Filename, ChecksumAsBytes, |
3567 | static_cast<uint8_t>(ChecksumKind))) |
3568 | return Error(FileNumberLoc, "file number already allocated"); |
3569 | |
3570 | return false; |
3571 | } |
3572 | |
3573 | bool AsmParser::parseCVFunctionId(int64_t &FunctionId, |
3574 | StringRef DirectiveName) { |
3575 | SMLoc Loc; |
3576 | return parseTokenLoc(Loc) || |
3577 | parseIntToken(FunctionId, "expected function id in '" + DirectiveName + |
3578 | "' directive") || |
3579 | check(FunctionId < 0 || FunctionId >= UINT_MAX(2147483647 *2U +1U), Loc, |
3580 | "expected function id within range [0, UINT_MAX)"); |
3581 | } |
3582 | |
3583 | bool AsmParser::parseCVFileId(int64_t &FileNumber, StringRef DirectiveName) { |
3584 | SMLoc Loc; |
3585 | return parseTokenLoc(Loc) || |
3586 | parseIntToken(FileNumber, "expected integer in '" + DirectiveName + |
3587 | "' directive") || |
3588 | check(FileNumber < 1, Loc, "file number less than one in '" + |
3589 | DirectiveName + "' directive") || |
3590 | check(!getCVContext().isValidFileNumber(FileNumber), Loc, |
3591 | "unassigned file number in '" + DirectiveName + "' directive"); |
3592 | } |
3593 | |
3594 | /// parseDirectiveCVFuncId |
3595 | /// ::= .cv_func_id FunctionId |
3596 | /// |
3597 | /// Introduces a function ID that can be used with .cv_loc. |
3598 | bool AsmParser::parseDirectiveCVFuncId() { |
3599 | SMLoc FunctionIdLoc = getTok().getLoc(); |
3600 | int64_t FunctionId; |
3601 | |
3602 | if (parseCVFunctionId(FunctionId, ".cv_func_id") || |
3603 | parseToken(AsmToken::EndOfStatement, |
3604 | "unexpected token in '.cv_func_id' directive")) |
3605 | return true; |
3606 | |
3607 | if (!getStreamer().EmitCVFuncIdDirective(FunctionId)) |
3608 | return Error(FunctionIdLoc, "function id already allocated"); |
3609 | |
3610 | return false; |
3611 | } |
3612 | |
3613 | /// parseDirectiveCVInlineSiteId |
3614 | /// ::= .cv_inline_site_id FunctionId |
3615 | /// "within" IAFunc |
3616 | /// "inlined_at" IAFile IALine [IACol] |
3617 | /// |
3618 | /// Introduces a function ID that can be used with .cv_loc. Includes "inlined |
3619 | /// at" source location information for use in the line table of the caller, |
3620 | /// whether the caller is a real function or another inlined call site. |
3621 | bool AsmParser::parseDirectiveCVInlineSiteId() { |
3622 | SMLoc FunctionIdLoc = getTok().getLoc(); |
3623 | int64_t FunctionId; |
3624 | int64_t IAFunc; |
3625 | int64_t IAFile; |
3626 | int64_t IALine; |
3627 | int64_t IACol = 0; |
3628 | |
3629 | // FunctionId |
3630 | if (parseCVFunctionId(FunctionId, ".cv_inline_site_id")) |
3631 | return true; |
3632 | |
3633 | // "within" |
3634 | if (check((getLexer().isNot(AsmToken::Identifier) || |
3635 | getTok().getIdentifier() != "within"), |
3636 | "expected 'within' identifier in '.cv_inline_site_id' directive")) |
3637 | return true; |
3638 | Lex(); |
3639 | |
3640 | // IAFunc |
3641 | if (parseCVFunctionId(IAFunc, ".cv_inline_site_id")) |
3642 | return true; |
3643 | |
3644 | // "inlined_at" |
3645 | if (check((getLexer().isNot(AsmToken::Identifier) || |
3646 | getTok().getIdentifier() != "inlined_at"), |
3647 | "expected 'inlined_at' identifier in '.cv_inline_site_id' " |
3648 | "directive") ) |
3649 | return true; |
3650 | Lex(); |
3651 | |
3652 | // IAFile IALine |
3653 | if (parseCVFileId(IAFile, ".cv_inline_site_id") || |
3654 | parseIntToken(IALine, "expected line number after 'inlined_at'")) |
3655 | return true; |
3656 | |
3657 | // [IACol] |
3658 | if (getLexer().is(AsmToken::Integer)) { |
3659 | IACol = getTok().getIntVal(); |
3660 | Lex(); |
3661 | } |
3662 | |
3663 | if (parseToken(AsmToken::EndOfStatement, |
3664 | "unexpected token in '.cv_inline_site_id' directive")) |
3665 | return true; |
3666 | |
3667 | if (!getStreamer().EmitCVInlineSiteIdDirective(FunctionId, IAFunc, IAFile, |
3668 | IALine, IACol, FunctionIdLoc)) |
3669 | return Error(FunctionIdLoc, "function id already allocated"); |
3670 | |
3671 | return false; |
3672 | } |
3673 | |
3674 | /// parseDirectiveCVLoc |
3675 | /// ::= .cv_loc FunctionId FileNumber [LineNumber] [ColumnPos] [prologue_end] |
3676 | /// [is_stmt VALUE] |
3677 | /// The first number is a file number, must have been previously assigned with |
3678 | /// a .file directive, the second number is the line number and optionally the |
3679 | /// third number is a column position (zero if not specified). The remaining |
3680 | /// optional items are .loc sub-directives. |
3681 | bool AsmParser::parseDirectiveCVLoc() { |
3682 | SMLoc DirectiveLoc = getTok().getLoc(); |
3683 | int64_t FunctionId, FileNumber; |
3684 | if (parseCVFunctionId(FunctionId, ".cv_loc") || |
3685 | parseCVFileId(FileNumber, ".cv_loc")) |
3686 | return true; |
3687 | |
3688 | int64_t LineNumber = 0; |
3689 | if (getLexer().is(AsmToken::Integer)) { |
3690 | LineNumber = getTok().getIntVal(); |
3691 | if (LineNumber < 0) |
3692 | return TokError("line number less than zero in '.cv_loc' directive"); |
3693 | Lex(); |
3694 | } |
3695 | |
3696 | int64_t ColumnPos = 0; |
3697 | if (getLexer().is(AsmToken::Integer)) { |
3698 | ColumnPos = getTok().getIntVal(); |
3699 | if (ColumnPos < 0) |
3700 | return TokError("column position less than zero in '.cv_loc' directive"); |
3701 | Lex(); |
3702 | } |
3703 | |
3704 | bool PrologueEnd = false; |
3705 | uint64_t IsStmt = 0; |
3706 | |
3707 | auto parseOp = [&]() -> bool { |
3708 | StringRef Name; |
3709 | SMLoc Loc = getTok().getLoc(); |
3710 | if (parseIdentifier(Name)) |
3711 | return TokError("unexpected token in '.cv_loc' directive"); |
3712 | if (Name == "prologue_end") |
3713 | PrologueEnd = true; |
3714 | else if (Name == "is_stmt") { |
3715 | Loc = getTok().getLoc(); |
3716 | const MCExpr *Value; |
3717 | if (parseExpression(Value)) |
3718 | return true; |
3719 | // The expression must be the constant 0 or 1. |
3720 | IsStmt = ~0ULL; |
3721 | if (const auto *MCE = dyn_cast<MCConstantExpr>(Value)) |
3722 | IsStmt = MCE->getValue(); |
3723 | |
3724 | if (IsStmt > 1) |
3725 | return Error(Loc, "is_stmt value not 0 or 1"); |
3726 | } else { |
3727 | return Error(Loc, "unknown sub-directive in '.cv_loc' directive"); |
3728 | } |
3729 | return false; |
3730 | }; |
3731 | |
3732 | if (parseMany(parseOp, false /*hasComma*/)) |
3733 | return true; |
3734 | |
3735 | getStreamer().EmitCVLocDirective(FunctionId, FileNumber, LineNumber, |
3736 | ColumnPos, PrologueEnd, IsStmt, StringRef(), |
3737 | DirectiveLoc); |
3738 | return false; |
3739 | } |
3740 | |
3741 | /// parseDirectiveCVLinetable |
3742 | /// ::= .cv_linetable FunctionId, FnStart, FnEnd |
3743 | bool AsmParser::parseDirectiveCVLinetable() { |
3744 | int64_t FunctionId; |
3745 | StringRef FnStartName, FnEndName; |
3746 | SMLoc Loc = getTok().getLoc(); |
3747 | if (parseCVFunctionId(FunctionId, ".cv_linetable") || |
3748 | parseToken(AsmToken::Comma, |
3749 | "unexpected token in '.cv_linetable' directive") || |
3750 | parseTokenLoc(Loc) || check(parseIdentifier(FnStartName), Loc, |
3751 | "expected identifier in directive") || |
3752 | parseToken(AsmToken::Comma, |
3753 | "unexpected token in '.cv_linetable' directive") || |
3754 | parseTokenLoc(Loc) || check(parseIdentifier(FnEndName), Loc, |
3755 | "expected identifier in directive")) |
3756 | return true; |
3757 | |
3758 | MCSymbol *FnStartSym = getContext().getOrCreateSymbol(FnStartName); |
3759 | MCSymbol *FnEndSym = getContext().getOrCreateSymbol(FnEndName); |
3760 | |
3761 | getStreamer().EmitCVLinetableDirective(FunctionId, FnStartSym, FnEndSym); |
3762 | return false; |
3763 | } |
3764 | |
3765 | /// parseDirectiveCVInlineLinetable |
3766 | /// ::= .cv_inline_linetable PrimaryFunctionId FileId LineNum FnStart FnEnd |
3767 | bool AsmParser::parseDirectiveCVInlineLinetable() { |
3768 | int64_t PrimaryFunctionId, SourceFileId, SourceLineNum; |
3769 | StringRef FnStartName, FnEndName; |
3770 | SMLoc Loc = getTok().getLoc(); |
3771 | if (parseCVFunctionId(PrimaryFunctionId, ".cv_inline_linetable") || |
3772 | parseTokenLoc(Loc) || |
3773 | parseIntToken( |
3774 | SourceFileId, |
3775 | "expected SourceField in '.cv_inline_linetable' directive") || |
3776 | check(SourceFileId <= 0, Loc, |
3777 | "File id less than zero in '.cv_inline_linetable' directive") || |
3778 | parseTokenLoc(Loc) || |
3779 | parseIntToken( |
3780 | SourceLineNum, |
3781 | "expected SourceLineNum in '.cv_inline_linetable' directive") || |
3782 | check(SourceLineNum < 0, Loc, |
3783 | "Line number less than zero in '.cv_inline_linetable' directive") || |
3784 | parseTokenLoc(Loc) || check(parseIdentifier(FnStartName), Loc, |
3785 | "expected identifier in directive") || |
3786 | parseTokenLoc(Loc) || check(parseIdentifier(FnEndName), Loc, |
3787 | "expected identifier in directive")) |
3788 | return true; |
3789 | |
3790 | if (parseToken(AsmToken::EndOfStatement, "Expected End of Statement")) |
3791 | return true; |
3792 | |
3793 | MCSymbol *FnStartSym = getContext().getOrCreateSymbol(FnStartName); |
3794 | MCSymbol *FnEndSym = getContext().getOrCreateSymbol(FnEndName); |
3795 | getStreamer().EmitCVInlineLinetableDirective(PrimaryFunctionId, SourceFileId, |
3796 | SourceLineNum, FnStartSym, |
3797 | FnEndSym); |
3798 | return false; |
3799 | } |
3800 | |
3801 | /// parseDirectiveCVDefRange |
3802 | /// ::= .cv_def_range RangeStart RangeEnd (GapStart GapEnd)*, bytes* |
3803 | bool AsmParser::parseDirectiveCVDefRange() { |
3804 | SMLoc Loc; |
3805 | std::vector<std::pair<const MCSymbol *, const MCSymbol *>> Ranges; |
3806 | while (getLexer().is(AsmToken::Identifier)) { |
3807 | Loc = getLexer().getLoc(); |
3808 | StringRef GapStartName; |
3809 | if (parseIdentifier(GapStartName)) |
3810 | return Error(Loc, "expected identifier in directive"); |
3811 | MCSymbol *GapStartSym = getContext().getOrCreateSymbol(GapStartName); |
3812 | |
3813 | Loc = getLexer().getLoc(); |
3814 | StringRef GapEndName; |
3815 | if (parseIdentifier(GapEndName)) |
3816 | return Error(Loc, "expected identifier in directive"); |
3817 | MCSymbol *GapEndSym = getContext().getOrCreateSymbol(GapEndName); |
3818 | |
3819 | Ranges.push_back({GapStartSym, GapEndSym}); |
3820 | } |
3821 | |
3822 | std::string FixedSizePortion; |
3823 | if (parseToken(AsmToken::Comma, "unexpected token in directive") || |
3824 | parseEscapedString(FixedSizePortion)) |
3825 | return true; |
3826 | |
3827 | getStreamer().EmitCVDefRangeDirective(Ranges, FixedSizePortion); |
3828 | return false; |
3829 | } |
3830 | |
3831 | /// parseDirectiveCVString |
3832 | /// ::= .cv_stringtable "string" |
3833 | bool AsmParser::parseDirectiveCVString() { |
3834 | std::string Data; |
3835 | if (checkForValidSection() || parseEscapedString(Data)) |
3836 | return addErrorSuffix(" in '.cv_string' directive"); |
3837 | |
3838 | // Put the string in the table and emit the offset. |
3839 | std::pair<StringRef, unsigned> Insertion = |
3840 | getCVContext().addToStringTable(Data); |
3841 | getStreamer().EmitIntValue(Insertion.second, 4); |
3842 | return false; |
3843 | } |
3844 | |
3845 | /// parseDirectiveCVStringTable |
3846 | /// ::= .cv_stringtable |
3847 | bool AsmParser::parseDirectiveCVStringTable() { |
3848 | getStreamer().EmitCVStringTableDirective(); |
3849 | return false; |
3850 | } |
3851 | |
3852 | /// parseDirectiveCVFileChecksums |
3853 | /// ::= .cv_filechecksums |
3854 | bool AsmParser::parseDirectiveCVFileChecksums() { |
3855 | getStreamer().EmitCVFileChecksumsDirective(); |
3856 | return false; |
3857 | } |
3858 | |
3859 | /// parseDirectiveCVFileChecksumOffset |
3860 | /// ::= .cv_filechecksumoffset fileno |
3861 | bool AsmParser::parseDirectiveCVFileChecksumOffset() { |
3862 | int64_t FileNo; |
3863 | if (parseIntToken(FileNo, "expected identifier in directive")) |
3864 | return true; |
3865 | if (parseToken(AsmToken::EndOfStatement, "Expected End of Statement")) |
3866 | return true; |
3867 | getStreamer().EmitCVFileChecksumOffsetDirective(FileNo); |
3868 | return false; |
3869 | } |
3870 | |
3871 | /// parseDirectiveCVFPOData |
3872 | /// ::= .cv_fpo_data procsym |
3873 | bool AsmParser::parseDirectiveCVFPOData() { |
3874 | SMLoc DirLoc = getLexer().getLoc(); |
3875 | StringRef ProcName; |
3876 | if (parseIdentifier(ProcName)) |
3877 | return TokError("expected symbol name"); |
3878 | if (parseEOL("unexpected tokens")) |
3879 | return addErrorSuffix(" in '.cv_fpo_data' directive"); |
3880 | MCSymbol *ProcSym = getContext().getOrCreateSymbol(ProcName); |
3881 | getStreamer().EmitCVFPOData(ProcSym, DirLoc); |
3882 | return false; |
3883 | } |
3884 | |
3885 | /// parseDirectiveCFISections |
3886 | /// ::= .cfi_sections section [, section] |
3887 | bool AsmParser::parseDirectiveCFISections() { |
3888 | StringRef Name; |
3889 | bool EH = false; |
3890 | bool Debug = false; |
3891 | |
3892 | if (parseIdentifier(Name)) |
3893 | return TokError("Expected an identifier"); |
3894 | |
3895 | if (Name == ".eh_frame") |
3896 | EH = true; |
3897 | else if (Name == ".debug_frame") |
3898 | Debug = true; |
3899 | |
3900 | if (getLexer().is(AsmToken::Comma)) { |
3901 | Lex(); |
3902 | |
3903 | if (parseIdentifier(Name)) |
3904 | return TokError("Expected an identifier"); |
3905 | |
3906 | if (Name == ".eh_frame") |
3907 | EH = true; |
3908 | else if (Name == ".debug_frame") |
3909 | Debug = true; |
3910 | } |
3911 | |
3912 | getStreamer().EmitCFISections(EH, Debug); |
3913 | return false; |
3914 | } |
3915 | |
3916 | /// parseDirectiveCFIStartProc |
3917 | /// ::= .cfi_startproc [simple] |
3918 | bool AsmParser::parseDirectiveCFIStartProc() { |
3919 | StringRef Simple; |
3920 | if (!parseOptionalToken(AsmToken::EndOfStatement)) { |
3921 | if (check(parseIdentifier(Simple) || Simple != "simple", |
3922 | "unexpected token") || |
3923 | parseToken(AsmToken::EndOfStatement)) |
3924 | return addErrorSuffix(" in '.cfi_startproc' directive"); |
3925 | } |
3926 | |
3927 | // TODO(kristina): Deal with a corner case of incorrect diagnostic context |
3928 | // being produced if this directive is emitted as part of preprocessor macro |
3929 | // expansion which can *ONLY* happen if Clang's cc1as is the API consumer. |
3930 | // Tools like llvm-mc on the other hand are not affected by it, and report |
3931 | // correct context information. |
3932 | getStreamer().EmitCFIStartProc(!Simple.empty(), Lexer.getLoc()); |
3933 | return false; |
3934 | } |
3935 | |
3936 | /// parseDirectiveCFIEndProc |
3937 | /// ::= .cfi_endproc |
3938 | bool AsmParser::parseDirectiveCFIEndProc() { |
3939 | getStreamer().EmitCFIEndProc(); |
3940 | return false; |
3941 | } |
3942 | |
3943 | /// parse register name or number. |
3944 | bool AsmParser::parseRegisterOrRegisterNumber(int64_t &Register, |
3945 | SMLoc DirectiveLoc) { |
3946 | unsigned RegNo; |
3947 | |
3948 | if (getLexer().isNot(AsmToken::Integer)) { |
3949 | if (getTargetParser().ParseRegister(RegNo, DirectiveLoc, DirectiveLoc)) |
3950 | return true; |
3951 | Register = getContext().getRegisterInfo()->getDwarfRegNum(RegNo, true); |
3952 | } else |
3953 | return parseAbsoluteExpression(Register); |
3954 | |
3955 | return false; |
3956 | } |
3957 | |
3958 | /// parseDirectiveCFIDefCfa |
3959 | /// ::= .cfi_def_cfa register, offset |
3960 | bool AsmParser::parseDirectiveCFIDefCfa(SMLoc DirectiveLoc) { |
3961 | int64_t Register = 0, Offset = 0; |
3962 | if (parseRegisterOrRegisterNumber(Register, DirectiveLoc) || |
3963 | parseToken(AsmToken::Comma, "unexpected token in directive") || |
3964 | parseAbsoluteExpression(Offset)) |
3965 | return true; |
3966 | |
3967 | getStreamer().EmitCFIDefCfa(Register, Offset); |
3968 | return false; |
3969 | } |
3970 | |
3971 | /// parseDirectiveCFIDefCfaOffset |
3972 | /// ::= .cfi_def_cfa_offset offset |
3973 | bool AsmParser::parseDirectiveCFIDefCfaOffset() { |
3974 | int64_t Offset = 0; |
3975 | if (parseAbsoluteExpression(Offset)) |
3976 | return true; |
3977 | |
3978 | getStreamer().EmitCFIDefCfaOffset(Offset); |
3979 | return false; |
3980 | } |
3981 | |
3982 | /// parseDirectiveCFIRegister |
3983 | /// ::= .cfi_register register, register |
3984 | bool AsmParser::parseDirectiveCFIRegister(SMLoc DirectiveLoc) { |
3985 | int64_t Register1 = 0, Register2 = 0; |
3986 | if (parseRegisterOrRegisterNumber(Register1, DirectiveLoc) || |
3987 | parseToken(AsmToken::Comma, "unexpected token in directive") || |
3988 | parseRegisterOrRegisterNumber(Register2, DirectiveLoc)) |
3989 | return true; |
3990 | |
3991 | getStreamer().EmitCFIRegister(Register1, Register2); |
3992 | return false; |
3993 | } |
3994 | |
3995 | /// parseDirectiveCFIWindowSave |
3996 | /// ::= .cfi_window_save |
3997 | bool AsmParser::parseDirectiveCFIWindowSave() { |
3998 | getStreamer().EmitCFIWindowSave(); |
3999 | return false; |
4000 | } |
4001 | |
4002 | /// parseDirectiveCFIAdjustCfaOffset |
4003 | /// ::= .cfi_adjust_cfa_offset adjustment |
4004 | bool AsmParser::parseDirectiveCFIAdjustCfaOffset() { |
4005 | int64_t Adjustment = 0; |
4006 | if (parseAbsoluteExpression(Adjustment)) |
4007 | return true; |
4008 | |
4009 | getStreamer().EmitCFIAdjustCfaOffset(Adjustment); |
4010 | return false; |
4011 | } |
4012 | |
4013 | /// parseDirectiveCFIDefCfaRegister |
4014 | /// ::= .cfi_def_cfa_register register |
4015 | bool AsmParser::parseDirectiveCFIDefCfaRegister(SMLoc DirectiveLoc) { |
4016 | int64_t Register = 0; |
4017 | if (parseRegisterOrRegisterNumber(Register, DirectiveLoc)) |
4018 | return true; |
4019 | |
4020 | getStreamer().EmitCFIDefCfaRegister(Register); |
4021 | return false; |
4022 | } |
4023 | |
4024 | /// parseDirectiveCFIOffset |
4025 | /// ::= .cfi_offset register, offset |
4026 | bool AsmParser::parseDirectiveCFIOffset(SMLoc DirectiveLoc) { |
4027 | int64_t Register = 0; |
4028 | int64_t Offset = 0; |
4029 | |
4030 | if (parseRegisterOrRegisterNumber(Register, DirectiveLoc) || |
4031 | parseToken(AsmToken::Comma, "unexpected token in directive") || |
4032 | parseAbsoluteExpression(Offset)) |
4033 | return true; |
4034 | |
4035 | getStreamer().EmitCFIOffset(Register, Offset); |
4036 | return false; |
4037 | } |
4038 | |
4039 | /// parseDirectiveCFIRelOffset |
4040 | /// ::= .cfi_rel_offset register, offset |
4041 | bool AsmParser::parseDirectiveCFIRelOffset(SMLoc DirectiveLoc) { |
4042 | int64_t Register = 0, Offset = 0; |
4043 | |
4044 | if (parseRegisterOrRegisterNumber(Register, DirectiveLoc) || |
4045 | parseToken(AsmToken::Comma, "unexpected token in directive") || |
4046 | parseAbsoluteExpression(Offset)) |
4047 | return true; |
4048 | |
4049 | getStreamer().EmitCFIRelOffset(Register, Offset); |
4050 | return false; |
4051 | } |
4052 | |
4053 | static bool isValidEncoding(int64_t Encoding) { |
4054 | if (Encoding & ~0xff) |
4055 | return false; |
4056 | |
4057 | if (Encoding == dwarf::DW_EH_PE_omit) |
4058 | return true; |
4059 | |
4060 | const unsigned Format = Encoding & 0xf; |
4061 | if (Format != dwarf::DW_EH_PE_absptr && Format != dwarf::DW_EH_PE_udata2 && |
4062 | Format != dwarf::DW_EH_PE_udata4 && Format != dwarf::DW_EH_PE_udata8 && |
4063 | Format != dwarf::DW_EH_PE_sdata2 && Format != dwarf::DW_EH_PE_sdata4 && |
4064 | Format != dwarf::DW_EH_PE_sdata8 && Format != dwarf::DW_EH_PE_signed) |
4065 | return false; |
4066 | |
4067 | const unsigned Application = Encoding & 0x70; |
4068 | if (Application != dwarf::DW_EH_PE_absptr && |
4069 | Application != dwarf::DW_EH_PE_pcrel) |
4070 | return false; |
4071 | |
4072 | return true; |
4073 | } |
4074 | |
4075 | /// parseDirectiveCFIPersonalityOrLsda |
4076 | /// IsPersonality true for cfi_personality, false for cfi_lsda |
4077 | /// ::= .cfi_personality encoding, [symbol_name] |
4078 | /// ::= .cfi_lsda encoding, [symbol_name] |
4079 | bool AsmParser::parseDirectiveCFIPersonalityOrLsda(bool IsPersonality) { |
4080 | int64_t Encoding = 0; |
4081 | if (parseAbsoluteExpression(Encoding)) |
4082 | return true; |
4083 | if (Encoding == dwarf::DW_EH_PE_omit) |
4084 | return false; |
4085 | |
4086 | StringRef Name; |
4087 | if (check(!isValidEncoding(Encoding), "unsupported encoding.") || |
4088 | parseToken(AsmToken::Comma, "unexpected token in directive") || |
4089 | check(parseIdentifier(Name), "expected identifier in directive")) |
4090 | return true; |
4091 | |
4092 | MCSymbol *Sym = getContext().getOrCreateSymbol(Name); |
4093 | |
4094 | if (IsPersonality) |
4095 | getStreamer().EmitCFIPersonality(Sym, Encoding); |
4096 | else |
4097 | getStreamer().EmitCFILsda(Sym, Encoding); |
4098 | return false; |
4099 | } |
4100 | |
4101 | /// parseDirectiveCFIRememberState |
4102 | /// ::= .cfi_remember_state |
4103 | bool AsmParser::parseDirectiveCFIRememberState() { |
4104 | getStreamer().EmitCFIRememberState(); |
4105 | return false; |
4106 | } |
4107 | |
4108 | /// parseDirectiveCFIRestoreState |
4109 | /// ::= .cfi_remember_state |
4110 | bool AsmParser::parseDirectiveCFIRestoreState() { |
4111 | getStreamer().EmitCFIRestoreState(); |
4112 | return false; |
4113 | } |
4114 | |
4115 | /// parseDirectiveCFISameValue |
4116 | /// ::= .cfi_same_value register |
4117 | bool AsmParser::parseDirectiveCFISameValue(SMLoc DirectiveLoc) { |
4118 | int64_t Register = 0; |
4119 | |
4120 | if (parseRegisterOrRegisterNumber(Register, DirectiveLoc)) |
4121 | return true; |
4122 | |
4123 | getStreamer().EmitCFISameValue(Register); |
4124 | return false; |
4125 | } |
4126 | |
4127 | /// parseDirectiveCFIRestore |
4128 | /// ::= .cfi_restore register |
4129 | bool AsmParser::parseDirectiveCFIRestore(SMLoc DirectiveLoc) { |
4130 | int64_t Register = 0; |
4131 | if (parseRegisterOrRegisterNumber(Register, DirectiveLoc)) |
4132 | return true; |
4133 | |
4134 | getStreamer().EmitCFIRestore(Register); |
4135 | return false; |
4136 | } |
4137 | |
4138 | /// parseDirectiveCFIEscape |
4139 | /// ::= .cfi_escape expression[,...] |
4140 | bool AsmParser::parseDirectiveCFIEscape() { |
4141 | std::string Values; |
4142 | int64_t CurrValue; |
4143 | if (parseAbsoluteExpression(CurrValue)) |
4144 | return true; |
4145 | |
4146 | Values.push_back((uint8_t)CurrValue); |
4147 | |
4148 | while (getLexer().is(AsmToken::Comma)) { |
4149 | Lex(); |
4150 | |
4151 | if (parseAbsoluteExpression(CurrValue)) |
4152 | return true; |
4153 | |
4154 | Values.push_back((uint8_t)CurrValue); |
4155 | } |
4156 | |
4157 | getStreamer().EmitCFIEscape(Values); |
4158 | return false; |
4159 | } |
4160 | |
4161 | /// parseDirectiveCFIReturnColumn |
4162 | /// ::= .cfi_return_column register |
4163 | bool AsmParser::parseDirectiveCFIReturnColumn(SMLoc DirectiveLoc) { |
4164 | int64_t Register = 0; |
4165 | if (parseRegisterOrRegisterNumber(Register, DirectiveLoc)) |
4166 | return true; |
4167 | getStreamer().EmitCFIReturnColumn(Register); |
4168 | return false; |
4169 | } |
4170 | |
4171 | /// parseDirectiveCFISignalFrame |
4172 | /// ::= .cfi_signal_frame |
4173 | bool AsmParser::parseDirectiveCFISignalFrame() { |
4174 | if (parseToken(AsmToken::EndOfStatement, |
4175 | "unexpected token in '.cfi_signal_frame'")) |
4176 | return true; |
4177 | |
4178 | getStreamer().EmitCFISignalFrame(); |
4179 | return false; |
4180 | } |
4181 | |
4182 | /// parseDirectiveCFIUndefined |
4183 | /// ::= .cfi_undefined register |
4184 | bool AsmParser::parseDirectiveCFIUndefined(SMLoc DirectiveLoc) { |
4185 | int64_t Register = 0; |
4186 | |
4187 | if (parseRegisterOrRegisterNumber(Register, DirectiveLoc)) |
4188 | return true; |
4189 | |
4190 | getStreamer().EmitCFIUndefined(Register); |
4191 | return false; |
4192 | } |
4193 | |
4194 | /// parseDirectiveAltmacro |
4195 | /// ::= .altmacro |
4196 | /// ::= .noaltmacro |
4197 | bool AsmParser::parseDirectiveAltmacro(StringRef Directive) { |
4198 | if (getLexer().isNot(AsmToken::EndOfStatement)) |
4199 | return TokError("unexpected token in '" + Directive + "' directive"); |
4200 | AltMacroMode = (Directive == ".altmacro"); |
4201 | return false; |
4202 | } |
4203 | |
4204 | /// parseDirectiveMacrosOnOff |
4205 | /// ::= .macros_on |
4206 | /// ::= .macros_off |
4207 | bool AsmParser::parseDirectiveMacrosOnOff(StringRef Directive) { |
4208 | if (parseToken(AsmToken::EndOfStatement, |
4209 | "unexpected token in '" + Directive + "' directive")) |
4210 | return true; |
4211 | |
4212 | setMacrosEnabled(Directive == ".macros_on"); |
4213 | return false; |
4214 | } |
4215 | |
4216 | /// parseDirectiveMacro |
4217 | /// ::= .macro name[,] [parameters] |
4218 | bool AsmParser::parseDirectiveMacro(SMLoc DirectiveLoc) { |
4219 | StringRef Name; |
4220 | if (parseIdentifier(Name)) |
4221 | return TokError("expected identifier in '.macro' directive"); |
4222 | |
4223 | if (getLexer().is(AsmToken::Comma)) |
4224 | Lex(); |
4225 | |
4226 | MCAsmMacroParameters Parameters; |
4227 | while (getLexer().isNot(AsmToken::EndOfStatement)) { |
4228 | |
4229 | if (!Parameters.empty() && Parameters.back().Vararg) |
4230 | return Error(Lexer.getLoc(), |
4231 | "Vararg parameter '" + Parameters.back().Name + |
4232 | "' should be last one in the list of parameters."); |
4233 | |
4234 | MCAsmMacroParameter Parameter; |
4235 | if (parseIdentifier(Parameter.Name)) |
4236 | return TokError("expected identifier in '.macro' directive"); |
4237 | |
4238 | // Emit an error if two (or more) named parameters share the same name |
4239 | for (const MCAsmMacroParameter& CurrParam : Parameters) |
4240 | if (CurrParam.Name.equals(Parameter.Name)) |
4241 | return TokError("macro '" + Name + "' has multiple parameters" |
4242 | " named '" + Parameter.Name + "'"); |
4243 | |
4244 | if (Lexer.is(AsmToken::Colon)) { |
4245 | Lex(); // consume ':' |
4246 | |
4247 | SMLoc QualLoc; |
4248 | StringRef Qualifier; |
4249 | |
4250 | QualLoc = Lexer.getLoc(); |
4251 | if (parseIdentifier(Qualifier)) |
4252 | return Error(QualLoc, "missing parameter qualifier for " |
4253 | "'" + Parameter.Name + "' in macro '" + Name + "'"); |
4254 | |
4255 | if (Qualifier == "req") |
4256 | Parameter.Required = true; |
4257 | else if (Qualifier == "vararg") |
4258 | Parameter.Vararg = true; |
4259 | else |
4260 | return Error(QualLoc, Qualifier + " is not a valid parameter qualifier " |
4261 | "for '" + Parameter.Name + "' in macro '" + Name + "'"); |
4262 | } |
4263 | |
4264 | if (getLexer().is(AsmToken::Equal)) { |
4265 | Lex(); |
4266 | |
4267 | SMLoc ParamLoc; |
4268 | |
4269 | ParamLoc = Lexer.getLoc(); |
4270 | if (parseMacroArgument(Parameter.Value, /*Vararg=*/false )) |
4271 | return true; |
4272 | |
4273 | if (Parameter.Required) |
4274 | Warning(ParamLoc, "pointless default value for required parameter " |
4275 | "'" + Parameter.Name + "' in macro '" + Name + "'"); |
4276 | } |
4277 | |
4278 | Parameters.push_back(std::move(Parameter)); |
4279 | |
4280 | if (getLexer().is(AsmToken::Comma)) |
4281 | Lex(); |
4282 | } |
4283 | |
4284 | // Eat just the end of statement. |
4285 | Lexer.Lex(); |
4286 | |
4287 | // Consuming deferred text, so use Lexer.Lex to ignore Lexing Errors |
4288 | AsmToken EndToken, StartToken = getTok(); |
4289 | unsigned MacroDepth = 0; |
4290 | // Lex the macro definition. |
4291 | while (true) { |
4292 | // Ignore Lexing errors in macros. |
4293 | while (Lexer.is(AsmToken::Error)) { |
4294 | Lexer.Lex(); |
4295 | } |
4296 | |
4297 | // Check whether we have reached the end of the file. |
4298 | if (getLexer().is(AsmToken::Eof)) |
4299 | return Error(DirectiveLoc, "no matching '.endmacro' in definition"); |
4300 | |
4301 | // Otherwise, check whether we have reach the .endmacro. |
4302 | if (getLexer().is(AsmToken::Identifier)) { |
4303 | if (getTok().getIdentifier() == ".endm" || |
4304 | getTok().getIdentifier() == ".endmacro") { |
4305 | if (MacroDepth == 0) { // Outermost macro. |
4306 | EndToken = getTok(); |
4307 | Lexer.Lex(); |
4308 | if (getLexer().isNot(AsmToken::EndOfStatement)) |
4309 | return TokError("unexpected token in '" + EndToken.getIdentifier() + |
4310 | "' directive"); |
4311 | break; |
4312 | } else { |
4313 | // Otherwise we just found the end of an inner macro. |
4314 | --MacroDepth; |
4315 | } |
4316 | } else if (getTok().getIdentifier() == ".macro") { |
4317 | // We allow nested macros. Those aren't instantiated until the outermost |
4318 | // macro is expanded so just ignore them for now. |
4319 | ++MacroDepth; |
4320 | } |
4321 | } |
4322 | |
4323 | // Otherwise, scan til the end of the statement. |
4324 | eatToEndOfStatement(); |
4325 | } |
4326 | |
4327 | if (getContext().lookupMacro(Name)) { |
4328 | return Error(DirectiveLoc, "macro '" + Name + "' is already defined"); |
4329 | } |
4330 | |
4331 | const char *BodyStart = StartToken.getLoc().getPointer(); |
4332 | const char *BodyEnd = EndToken.getLoc().getPointer(); |
4333 | StringRef Body = StringRef(BodyStart, BodyEnd - BodyStart); |
4334 | checkForBadMacro(DirectiveLoc, Name, Body, Parameters); |
4335 | MCAsmMacro Macro(Name, Body, std::move(Parameters)); |
4336 | 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) |
4337 | Macro.dump())do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("asm-macros")) { dbgs() << "Defining new macro:\n"; Macro .dump(); } } while (false); |
4338 | getContext().defineMacro(Name, std::move(Macro)); |
4339 | return false; |
4340 | } |
4341 | |
4342 | /// checkForBadMacro |
4343 | /// |
4344 | /// With the support added for named parameters there may be code out there that |
4345 | /// is transitioning from positional parameters. In versions of gas that did |
4346 | /// not support named parameters they would be ignored on the macro definition. |
4347 | /// But to support both styles of parameters this is not possible so if a macro |
4348 | /// definition has named parameters but does not use them and has what appears |
4349 | /// to be positional parameters, strings like $1, $2, ... and $n, then issue a |
4350 | /// warning that the positional parameter found in body which have no effect. |
4351 | /// Hoping the developer will either remove the named parameters from the macro |
4352 | /// definition so the positional parameters get used if that was what was |
4353 | /// intended or change the macro to use the named parameters. It is possible |
4354 | /// this warning will trigger when the none of the named parameters are used |
4355 | /// and the strings like $1 are infact to simply to be passed trough unchanged. |
4356 | void AsmParser::checkForBadMacro(SMLoc DirectiveLoc, StringRef Name, |
4357 | StringRef Body, |
4358 | ArrayRef<MCAsmMacroParameter> Parameters) { |
4359 | // If this macro is not defined with named parameters the warning we are |
4360 | // checking for here doesn't apply. |
4361 | unsigned NParameters = Parameters.size(); |
4362 | if (NParameters == 0) |
4363 | return; |
4364 | |
4365 | bool NamedParametersFound = false; |
4366 | bool PositionalParametersFound = false; |
4367 | |
4368 | // Look at the body of the macro for use of both the named parameters and what |
4369 | // are likely to be positional parameters. This is what expandMacro() is |
4370 | // doing when it finds the parameters in the body. |
4371 | while (!Body.empty()) { |
4372 | // Scan for the next possible parameter. |
4373 | std::size_t End = Body.size(), Pos = 0; |
4374 | for (; Pos != End; ++Pos) { |
4375 | // Check for a substitution or escape. |
4376 | // This macro is defined with parameters, look for \foo, \bar, etc. |
4377 | if (Body[Pos] == '\\' && Pos + 1 != End) |
4378 | break; |
4379 | |
4380 | // This macro should have parameters, but look for $0, $1, ..., $n too. |
4381 | if (Body[Pos] != '$' || Pos + 1 == End) |
4382 | continue; |
4383 | char Next = Body[Pos + 1]; |
4384 | if (Next == '$' || Next == 'n' || |
4385 | isdigit(static_cast<unsigned char>(Next))) |
4386 | break; |
4387 | } |
4388 | |
4389 | // Check if we reached the end. |
4390 | if (Pos == End) |
4391 | break; |
4392 | |
4393 | if (Body[Pos] == '$') { |
4394 | switch (Body[Pos + 1]) { |
4395 | // $$ => $ |
4396 | case '$': |
4397 | break; |
4398 | |
4399 | // $n => number of arguments |
4400 | case 'n': |
4401 | PositionalParametersFound = true; |
4402 | break; |
4403 | |
4404 | // $[0-9] => argument |
4405 | default: { |
4406 | PositionalParametersFound = true; |
4407 | break; |
4408 | } |
4409 | } |
4410 | Pos += 2; |
4411 | } else { |
4412 | unsigned I = Pos + 1; |
4413 | while (isIdentifierChar(Body[I]) && I + 1 != End) |
4414 | ++I; |
4415 | |
4416 | const char *Begin = Body.data() + Pos + 1; |
4417 | StringRef Argument(Begin, I - (Pos + 1)); |
4418 | unsigned Index = 0; |
4419 | for (; Index < NParameters; ++Index) |
4420 | if (Parameters[Index].Name == Argument) |
4421 | break; |
4422 | |
4423 | if (Index == NParameters) { |
4424 | if (Body[Pos + 1] == '(' && Body[Pos + 2] == ')') |
4425 | Pos += 3; |
4426 | else { |
4427 | Pos = I; |
4428 | } |
4429 | } else { |
4430 | NamedParametersFound = true; |
4431 | Pos += 1 + Argument.size(); |
4432 | } |
4433 | } |
4434 | // Update the scan point. |
4435 | Body = Body.substr(Pos); |
4436 | } |
4437 | |
4438 | if (!NamedParametersFound && PositionalParametersFound) |
4439 | Warning(DirectiveLoc, "macro defined with named parameters which are not " |
4440 | "used in macro body, possible positional parameter " |
4441 | "found in body which will have no effect"); |
4442 | } |
4443 | |
4444 | /// parseDirectiveExitMacro |
4445 | /// ::= .exitm |
4446 | bool AsmParser::parseDirectiveExitMacro(StringRef Directive) { |
4447 | if (parseToken(AsmToken::EndOfStatement, |
4448 | "unexpected token in '" + Directive + "' directive")) |
4449 | return true; |
4450 | |
4451 | if (!isInsideMacroInstantiation()) |
4452 | return TokError("unexpected '" + Directive + "' in file, " |
4453 | "no current macro definition"); |
4454 | |
4455 | // Exit all conditionals that are active in the current macro. |
4456 | while (TheCondStack.size() != ActiveMacros.back()->CondStackDepth) { |
4457 | TheCondState = TheCondStack.back(); |
4458 | TheCondStack.pop_back(); |
4459 | } |
4460 | |
4461 | handleMacroExit(); |
4462 | return false; |
4463 | } |
4464 | |
4465 | /// parseDirectiveEndMacro |
4466 | /// ::= .endm |
4467 | /// ::= .endmacro |
4468 | bool AsmParser::parseDirectiveEndMacro(StringRef Directive) { |
4469 | if (getLexer().isNot(AsmToken::EndOfStatement)) |
4470 | return TokError("unexpected token in '" + Directive + "' directive"); |
4471 | |
4472 | // If we are inside a macro instantiation, terminate the current |
4473 | // instantiation. |
4474 | if (isInsideMacroInstantiation()) { |
4475 | handleMacroExit(); |
4476 | return false; |
4477 | } |
4478 | |
4479 | // Otherwise, this .endmacro is a stray entry in the file; well formed |
4480 | // .endmacro directives are handled during the macro definition parsing. |
4481 | return TokError("unexpected '" + Directive + "' in file, " |
4482 | "no current macro definition"); |
4483 | } |
4484 | |
4485 | /// parseDirectivePurgeMacro |
4486 | /// ::= .purgem |
4487 | bool AsmParser::parseDirectivePurgeMacro(SMLoc DirectiveLoc) { |
4488 | StringRef Name; |
4489 | SMLoc Loc; |
4490 | if (parseTokenLoc(Loc) || |
4491 | check(parseIdentifier(Name), Loc, |
4492 | "expected identifier in '.purgem' directive") || |
4493 | parseToken(AsmToken::EndOfStatement, |
4494 | "unexpected token in '.purgem' directive")) |
4495 | return true; |
4496 | |
4497 | if (!getContext().lookupMacro(Name)) |
4498 | return Error(DirectiveLoc, "macro '" + Name + "' is not defined"); |
4499 | |
4500 | getContext().undefineMacro(Name); |
4501 | DEBUG_WITH_TYPE("asm-macros", dbgs()do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("asm-macros")) { dbgs() << "Un-defining macro: " << Name << "\n"; } } while (false) |
4502 | << "Un-defining macro: " << Name << "\n")do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("asm-macros")) { dbgs() << "Un-defining macro: " << Name << "\n"; } } while (false); |
4503 | return false; |
4504 | } |
4505 | |
4506 | /// parseDirectiveBundleAlignMode |
4507 | /// ::= {.bundle_align_mode} expression |
4508 | bool AsmParser::parseDirectiveBundleAlignMode() { |
4509 | // Expect a single argument: an expression that evaluates to a constant |
4510 | // in the inclusive range 0-30. |
4511 | SMLoc ExprLoc = getLexer().getLoc(); |
4512 | int64_t AlignSizePow2; |
4513 | if (checkForValidSection() || parseAbsoluteExpression(AlignSizePow2) || |
4514 | parseToken(AsmToken::EndOfStatement, "unexpected token after expression " |
4515 | "in '.bundle_align_mode' " |
4516 | "directive") || |
4517 | check(AlignSizePow2 < 0 || AlignSizePow2 > 30, ExprLoc, |
4518 | "invalid bundle alignment size (expected between 0 and 30)")) |
4519 | return true; |
4520 | |
4521 | // Because of AlignSizePow2's verified range we can safely truncate it to |
4522 | // unsigned. |
4523 | getStreamer().EmitBundleAlignMode(static_cast<unsigned>(AlignSizePow2)); |
4524 | return false; |
4525 | } |
4526 | |
4527 | /// parseDirectiveBundleLock |
4528 | /// ::= {.bundle_lock} [align_to_end] |
4529 | bool AsmParser::parseDirectiveBundleLock() { |
4530 | if (checkForValidSection()) |
4531 | return true; |
4532 | bool AlignToEnd = false; |
4533 | |
4534 | StringRef Option; |
4535 | SMLoc Loc = getTok().getLoc(); |
4536 | const char *kInvalidOptionError = |
4537 | "invalid option for '.bundle_lock' directive"; |
4538 | |
4539 | if (!parseOptionalToken(AsmToken::EndOfStatement)) { |
4540 | if (check(parseIdentifier(Option), Loc, kInvalidOptionError) || |
4541 | check(Option != "align_to_end", Loc, kInvalidOptionError) || |
4542 | parseToken(AsmToken::EndOfStatement, |
4543 | "unexpected token after '.bundle_lock' directive option")) |
4544 | return true; |
4545 | AlignToEnd = true; |
4546 | } |
4547 | |
4548 | getStreamer().EmitBundleLock(AlignToEnd); |
4549 | return false; |
4550 | } |
4551 | |
4552 | /// parseDirectiveBundleLock |
4553 | /// ::= {.bundle_lock} |
4554 | bool AsmParser::parseDirectiveBundleUnlock() { |
4555 | if (checkForValidSection() || |
4556 | parseToken(AsmToken::EndOfStatement, |
4557 | "unexpected token in '.bundle_unlock' directive")) |
4558 | return true; |
4559 | |
4560 | getStreamer().EmitBundleUnlock(); |
4561 | return false; |
4562 | } |
4563 | |
4564 | /// parseDirectiveSpace |
4565 | /// ::= (.skip | .space) expression [ , expression ] |
4566 | bool AsmParser::parseDirectiveSpace(StringRef IDVal) { |
4567 | SMLoc NumBytesLoc = Lexer.getLoc(); |
4568 | const MCExpr *NumBytes; |
4569 | if (checkForValidSection() || parseExpression(NumBytes)) |
4570 | return true; |
4571 | |
4572 | int64_t FillExpr = 0; |
4573 | if (parseOptionalToken(AsmToken::Comma)) |
4574 | if (parseAbsoluteExpression(FillExpr)) |
4575 | return addErrorSuffix("in '" + Twine(IDVal) + "' directive"); |
4576 | if (parseToken(AsmToken::EndOfStatement)) |
4577 | return addErrorSuffix("in '" + Twine(IDVal) + "' directive"); |
4578 | |
4579 | // FIXME: Sometimes the fill expr is 'nop' if it isn't supplied, instead of 0. |
4580 | getStreamer().emitFill(*NumBytes, FillExpr, NumBytesLoc); |
4581 | |
4582 | return false; |
4583 | } |
4584 | |
4585 | /// parseDirectiveDCB |
4586 | /// ::= .dcb.{b, l, w} expression, expression |
4587 | bool AsmParser::parseDirectiveDCB(StringRef IDVal, unsigned Size) { |
4588 | SMLoc NumValuesLoc = Lexer.getLoc(); |
4589 | int64_t NumValues; |
4590 | if (checkForValidSection() || parseAbsoluteExpression(NumValues)) |
4591 | return true; |
4592 | |
4593 | if (NumValues < 0) { |
4594 | Warning(NumValuesLoc, "'" + Twine(IDVal) + "' directive with negative repeat count has no effect"); |
4595 | return false; |
4596 | } |
4597 | |
4598 | if (parseToken(AsmToken::Comma, |
4599 | "unexpected token in '" + Twine(IDVal) + "' directive")) |
4600 | return true; |
4601 | |
4602 | const MCExpr *Value; |
4603 | SMLoc ExprLoc = getLexer().getLoc(); |
4604 | if (parseExpression(Value)) |
4605 | return true; |
4606 | |
4607 | // Special case constant expressions to match code generator. |
4608 | if (const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Value)) { |
4609 | assert(Size <= 8 && "Invalid size")((Size <= 8 && "Invalid size") ? static_cast<void > (0) : __assert_fail ("Size <= 8 && \"Invalid size\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/MC/MCParser/AsmParser.cpp" , 4609, __PRETTY_FUNCTION__)); |
4610 | uint64_t IntValue = MCE->getValue(); |
4611 | if (!isUIntN(8 * Size, IntValue) && !isIntN(8 * Size, IntValue)) |
4612 | return Error(ExprLoc, "literal value out of range for directive"); |
4613 | for (uint64_t i = 0, e = NumValues; i != e; ++i) |
4614 | getStreamer().EmitIntValue(IntValue, Size); |
4615 | } else { |
4616 | for (uint64_t i = 0, e = NumValues; i != e; ++i) |
4617 | getStreamer().EmitValue(Value, Size, ExprLoc); |
4618 | } |
4619 | |
4620 | if (parseToken(AsmToken::EndOfStatement, |
4621 | "unexpected token in '" + Twine(IDVal) + "' directive")) |
4622 | return true; |
4623 | |
4624 | return false; |
4625 | } |
4626 | |
4627 | /// parseDirectiveRealDCB |
4628 | /// ::= .dcb.{d, s} expression, expression |
4629 | bool AsmParser::parseDirectiveRealDCB(StringRef IDVal, const fltSemantics &Semantics) { |
4630 | SMLoc NumValuesLoc = Lexer.getLoc(); |
4631 | int64_t NumValues; |
4632 | if (checkForValidSection() || parseAbsoluteExpression(NumValues)) |
4633 | return true; |
4634 | |
4635 | if (NumValues < 0) { |
4636 | Warning(NumValuesLoc, "'" + Twine(IDVal) + "' directive with negative repeat count has no effect"); |
4637 | return false; |
4638 | } |
4639 | |
4640 | if (parseToken(AsmToken::Comma, |
4641 | "unexpected token in '" + Twine(IDVal) + "' directive")) |
4642 | return true; |
4643 | |
4644 | APInt AsInt; |
4645 | if (parseRealValue(Semantics, AsInt)) |
4646 | return true; |
4647 | |
4648 | if (parseToken(AsmToken::EndOfStatement, |
4649 | "unexpected token in '" + Twine(IDVal) + "' directive")) |
4650 | return true; |
4651 | |
4652 | for (uint64_t i = 0, e = NumValues; i != e; ++i) |
4653 | getStreamer().EmitIntValue(AsInt.getLimitedValue(), |
4654 | AsInt.getBitWidth() / 8); |
4655 | |
4656 | return false; |
4657 | } |
4658 | |
4659 | /// parseDirectiveDS |
4660 | /// ::= .ds.{b, d, l, p, s, w, x} expression |
4661 | bool AsmParser::parseDirectiveDS(StringRef IDVal, unsigned Size) { |
4662 | SMLoc NumValuesLoc = Lexer.getLoc(); |
4663 | int64_t NumValues; |
4664 | if (checkForValidSection() || parseAbsoluteExpression(NumValues)) |
4665 | return true; |
4666 | |
4667 | if (NumValues < 0) { |
4668 | Warning(NumValuesLoc, "'" + Twine(IDVal) + "' directive with negative repeat count has no effect"); |
4669 | return false; |
4670 | } |
4671 | |
4672 | if (parseToken(AsmToken::EndOfStatement, |
4673 | "unexpected token in '" + Twine(IDVal) + "' directive")) |
4674 | return true; |
4675 | |
4676 | for (uint64_t i = 0, e = NumValues; i != e; ++i) |
4677 | getStreamer().emitFill(Size, 0); |
4678 | |
4679 | return false; |
4680 | } |
4681 | |
4682 | /// parseDirectiveLEB128 |
4683 | /// ::= (.sleb128 | .uleb128) [ expression (, expression)* ] |
4684 | bool AsmParser::parseDirectiveLEB128(bool Signed) { |
4685 | if (checkForValidSection()) |
4686 | return true; |
4687 | |
4688 | auto parseOp = [&]() -> bool { |
4689 | const MCExpr *Value; |
4690 | if (parseExpression(Value)) |
4691 | return true; |
4692 | if (Signed) |
4693 | getStreamer().EmitSLEB128Value(Value); |
4694 | else |
4695 | getStreamer().EmitULEB128Value(Value); |
4696 | return false; |
4697 | }; |
4698 | |
4699 | if (parseMany(parseOp)) |
4700 | return addErrorSuffix(" in directive"); |
4701 | |
4702 | return false; |
4703 | } |
4704 | |
4705 | /// parseDirectiveSymbolAttribute |
4706 | /// ::= { ".globl", ".weak", ... } [ identifier ( , identifier )* ] |
4707 | bool AsmParser::parseDirectiveSymbolAttribute(MCSymbolAttr Attr) { |
4708 | auto parseOp = [&]() -> bool { |
4709 | StringRef Name; |
4710 | SMLoc Loc = getTok().getLoc(); |
4711 | if (parseIdentifier(Name)) |
4712 | return Error(Loc, "expected identifier"); |
4713 | MCSymbol *Sym = getContext().getOrCreateSymbol(Name); |
4714 | |
4715 | // Assembler local symbols don't make any sense here. Complain loudly. |
4716 | if (Sym->isTemporary()) |
4717 | return Error(Loc, "non-local symbol required"); |
4718 | |
4719 | if (!getStreamer().EmitSymbolAttribute(Sym, Attr)) |
4720 | return Error(Loc, "unable to emit symbol attribute"); |
4721 | return false; |
4722 | }; |
4723 | |
4724 | if (parseMany(parseOp)) |
4725 | return addErrorSuffix(" in directive"); |
4726 | return false; |
4727 | } |
4728 | |
4729 | /// parseDirectiveComm |
4730 | /// ::= ( .comm | .lcomm ) identifier , size_expression [ , align_expression ] |
4731 | bool AsmParser::parseDirectiveComm(bool IsLocal) { |
4732 | if (checkForValidSection()) |
4733 | return true; |
4734 | |
4735 | SMLoc IDLoc = getLexer().getLoc(); |
4736 | StringRef Name; |
4737 | if (parseIdentifier(Name)) |
4738 | return TokError("expected identifier in directive"); |
4739 | |
4740 | // Handle the identifier as the key symbol. |
4741 | MCSymbol *Sym = getContext().getOrCreateSymbol(Name); |
4742 | |
4743 | if (getLexer().isNot(AsmToken::Comma)) |
4744 | return TokError("unexpected token in directive"); |
4745 | Lex(); |
4746 | |
4747 | int64_t Size; |
4748 | SMLoc SizeLoc = getLexer().getLoc(); |
4749 | if (parseAbsoluteExpression(Size)) |
4750 | return true; |
4751 | |
4752 | int64_t Pow2Alignment = 0; |
4753 | SMLoc Pow2AlignmentLoc; |
4754 | if (getLexer().is(AsmToken::Comma)) { |
4755 | Lex(); |
4756 | Pow2AlignmentLoc = getLexer().getLoc(); |
4757 | if (parseAbsoluteExpression(Pow2Alignment)) |
4758 | return true; |
4759 | |
4760 | LCOMM::LCOMMType LCOMM = Lexer.getMAI().getLCOMMDirectiveAlignmentType(); |
4761 | if (IsLocal && LCOMM == LCOMM::NoAlignment) |
4762 | return Error(Pow2AlignmentLoc, "alignment not supported on this target"); |
4763 | |
4764 | // If this target takes alignments in bytes (not log) validate and convert. |
4765 | if ((!IsLocal && Lexer.getMAI().getCOMMDirectiveAlignmentIsInBytes()) || |
4766 | (IsLocal && LCOMM == LCOMM::ByteAlignment)) { |
4767 | if (!isPowerOf2_64(Pow2Alignment)) |
4768 | return Error(Pow2AlignmentLoc, "alignment must be a power of 2"); |
4769 | Pow2Alignment = Log2_64(Pow2Alignment); |
4770 | } |
4771 | } |
4772 | |
4773 | if (parseToken(AsmToken::EndOfStatement, |
4774 | "unexpected token in '.comm' or '.lcomm' directive")) |
4775 | return true; |
4776 | |
4777 | // NOTE: a size of zero for a .comm should create a undefined symbol |
4778 | // but a size of .lcomm creates a bss symbol of size zero. |
4779 | if (Size < 0) |
4780 | return Error(SizeLoc, "invalid '.comm' or '.lcomm' directive size, can't " |
4781 | "be less than zero"); |
4782 | |
4783 | // NOTE: The alignment in the directive is a power of 2 value, the assembler |
4784 | // may internally end up wanting an alignment in bytes. |
4785 | // FIXME: Diagnose overflow. |
4786 | if (Pow2Alignment < 0) |
4787 | return Error(Pow2AlignmentLoc, "invalid '.comm' or '.lcomm' directive " |
4788 | "alignment, can't be less than zero"); |
4789 | |
4790 | Sym->redefineIfPossible(); |
4791 | if (!Sym->isUndefined()) |
4792 | return Error(IDLoc, "invalid symbol redefinition"); |
4793 | |
4794 | // Create the Symbol as a common or local common with Size and Pow2Alignment |
4795 | if (IsLocal) { |
4796 | getStreamer().EmitLocalCommonSymbol(Sym, Size, 1 << Pow2Alignment); |
4797 | return false; |
4798 | } |
4799 | |
4800 | getStreamer().EmitCommonSymbol(Sym, Size, 1 << Pow2Alignment); |
4801 | return false; |
4802 | } |
4803 | |
4804 | /// parseDirectiveAbort |
4805 | /// ::= .abort [... message ...] |
4806 | bool AsmParser::parseDirectiveAbort() { |
4807 | // FIXME: Use loc from directive. |
4808 | SMLoc Loc = getLexer().getLoc(); |
4809 | |
4810 | StringRef Str = parseStringToEndOfStatement(); |
4811 | if (parseToken(AsmToken::EndOfStatement, |
4812 | "unexpected token in '.abort' directive")) |
4813 | return true; |
4814 | |
4815 | if (Str.empty()) |
4816 | return Error(Loc, ".abort detected. Assembly stopping."); |
4817 | else |
4818 | return Error(Loc, ".abort '" + Str + "' detected. Assembly stopping."); |
4819 | // FIXME: Actually abort assembly here. |
4820 | |
4821 | return false; |
4822 | } |
4823 | |
4824 | /// parseDirectiveInclude |
4825 | /// ::= .include "filename" |
4826 | bool AsmParser::parseDirectiveInclude() { |
4827 | // Allow the strings to have escaped octal character sequence. |
4828 | std::string Filename; |
4829 | SMLoc IncludeLoc = getTok().getLoc(); |
4830 | |
4831 | if (check(getTok().isNot(AsmToken::String), |
4832 | "expected string in '.include' directive") || |
4833 | parseEscapedString(Filename) || |
4834 | check(getTok().isNot(AsmToken::EndOfStatement), |
4835 | "unexpected token in '.include' directive") || |
4836 | // Attempt to switch the lexer to the included file before consuming the |
4837 | // end of statement to avoid losing it when we switch. |
4838 | check(enterIncludeFile(Filename), IncludeLoc, |
4839 | "Could not find include file '" + Filename + "'")) |
4840 | return true; |
4841 | |
4842 | return false; |
4843 | } |
4844 | |
4845 | /// parseDirectiveIncbin |
4846 | /// ::= .incbin "filename" [ , skip [ , count ] ] |
4847 | bool AsmParser::parseDirectiveIncbin() { |
4848 | // Allow the strings to have escaped octal character sequence. |
4849 | std::string Filename; |
4850 | SMLoc IncbinLoc = getTok().getLoc(); |
4851 | if (check(getTok().isNot(AsmToken::String), |
4852 | "expected string in '.incbin' directive") || |
4853 | parseEscapedString(Filename)) |
4854 | return true; |
4855 | |
4856 | int64_t Skip = 0; |
4857 | const MCExpr *Count = nullptr; |
4858 | SMLoc SkipLoc, CountLoc; |
4859 | if (parseOptionalToken(AsmToken::Comma)) { |
4860 | // The skip expression can be omitted while specifying the count, e.g: |
4861 | // .incbin "filename",,4 |
4862 | if (getTok().isNot(AsmToken::Comma)) { |
4863 | if (parseTokenLoc(SkipLoc) || parseAbsoluteExpression(Skip)) |
4864 | return true; |
4865 | } |
4866 | if (parseOptionalToken(AsmToken::Comma)) { |
4867 | CountLoc = getTok().getLoc(); |
4868 | if (parseExpression(Count)) |
4869 | return true; |
4870 | } |
4871 | } |
4872 | |
4873 | if (parseToken(AsmToken::EndOfStatement, |
4874 | "unexpected token in '.incbin' directive")) |
4875 | return true; |
4876 | |
4877 | if (check(Skip < 0, SkipLoc, "skip is negative")) |
4878 | return true; |
4879 | |
4880 | // Attempt to process the included file. |
4881 | if (processIncbinFile(Filename, Skip, Count, CountLoc)) |
4882 | return Error(IncbinLoc, "Could not find incbin file '" + Filename + "'"); |
4883 | return false; |
4884 | } |
4885 | |
4886 | /// parseDirectiveIf |
4887 | /// ::= .if{,eq,ge,gt,le,lt,ne} expression |
4888 | bool AsmParser::parseDirectiveIf(SMLoc DirectiveLoc, DirectiveKind DirKind) { |
4889 | TheCondStack.push_back(TheCondState); |
4890 | TheCondState.TheCond = AsmCond::IfCond; |
4891 | if (TheCondState.Ignore) { |
4892 | eatToEndOfStatement(); |
4893 | } else { |
4894 | int64_t ExprValue; |
4895 | if (parseAbsoluteExpression(ExprValue) || |
4896 | parseToken(AsmToken::EndOfStatement, |
4897 | "unexpected token in '.if' directive")) |
4898 | return true; |
4899 | |
4900 | switch (DirKind) { |
4901 | default: |
4902 | llvm_unreachable("unsupported directive")::llvm::llvm_unreachable_internal("unsupported directive", "/build/llvm-toolchain-snapshot-8~svn350071/lib/MC/MCParser/AsmParser.cpp" , 4902); |
4903 | case DK_IF: |
4904 | case DK_IFNE: |
4905 | break; |
4906 | case DK_IFEQ: |
4907 | ExprValue = ExprValue == 0; |
4908 | break; |
4909 | case DK_IFGE: |
4910 | ExprValue = ExprValue >= 0; |
4911 | break; |
4912 | case DK_IFGT: |
4913 | ExprValue = ExprValue > 0; |
4914 | break; |
4915 | case DK_IFLE: |
4916 | ExprValue = ExprValue <= 0; |
4917 | break; |
4918 | case DK_IFLT: |
4919 | ExprValue = ExprValue < 0; |
4920 | break; |
4921 | } |
4922 | |
4923 | TheCondState.CondMet = ExprValue; |
4924 | TheCondState.Ignore = !TheCondState.CondMet; |
4925 | } |
4926 | |
4927 | return false; |
4928 | } |
4929 | |
4930 | /// parseDirectiveIfb |
4931 | /// ::= .ifb string |
4932 | bool AsmParser::parseDirectiveIfb(SMLoc DirectiveLoc, bool ExpectBlank) { |
4933 | TheCondStack.push_back(TheCondState); |
4934 | TheCondState.TheCond = AsmCond::IfCond; |
4935 | |
4936 | if (TheCondState.Ignore) { |
4937 | eatToEndOfStatement(); |
4938 | } else { |
4939 | StringRef Str = parseStringToEndOfStatement(); |
4940 | |
4941 | if (parseToken(AsmToken::EndOfStatement, |
4942 | "unexpected token in '.ifb' directive")) |
4943 | return true; |
4944 | |
4945 | TheCondState.CondMet = ExpectBlank == Str.empty(); |
4946 | TheCondState.Ignore = !TheCondState.CondMet; |
4947 | } |
4948 | |
4949 | return false; |
4950 | } |
4951 | |
4952 | /// parseDirectiveIfc |
4953 | /// ::= .ifc string1, string2 |
4954 | /// ::= .ifnc string1, string2 |
4955 | bool AsmParser::parseDirectiveIfc(SMLoc DirectiveLoc, bool ExpectEqual) { |
4956 | TheCondStack.push_back(TheCondState); |
4957 | TheCondState.TheCond = AsmCond::IfCond; |
4958 | |
4959 | if (TheCondState.Ignore) { |
4960 | eatToEndOfStatement(); |
4961 | } else { |
4962 | StringRef Str1 = parseStringToComma(); |
4963 | |
4964 | if (parseToken(AsmToken::Comma, "unexpected token in '.ifc' directive")) |
4965 | return true; |
4966 | |
4967 | StringRef Str2 = parseStringToEndOfStatement(); |
4968 | |
4969 | if (parseToken(AsmToken::EndOfStatement, |
4970 | "unexpected token in '.ifc' directive")) |
4971 | return true; |
4972 | |
4973 | TheCondState.CondMet = ExpectEqual == (Str1.trim() == Str2.trim()); |
4974 | TheCondState.Ignore = !TheCondState.CondMet; |
4975 | } |
4976 | |
4977 | return false; |
4978 | } |
4979 | |
4980 | /// parseDirectiveIfeqs |
4981 | /// ::= .ifeqs string1, string2 |
4982 | bool AsmParser::parseDirectiveIfeqs(SMLoc DirectiveLoc, bool ExpectEqual) { |
4983 | if (Lexer.isNot(AsmToken::String)) { |
4984 | if (ExpectEqual) |
4985 | return TokError("expected string parameter for '.ifeqs' directive"); |
4986 | return TokError("expected string parameter for '.ifnes' directive"); |
4987 | } |
4988 | |
4989 | StringRef String1 = getTok().getStringContents(); |
4990 | Lex(); |
4991 | |
4992 | if (Lexer.isNot(AsmToken::Comma)) { |
4993 | if (ExpectEqual) |
4994 | return TokError( |
4995 | "expected comma after first string for '.ifeqs' directive"); |
4996 | return TokError("expected comma after first string for '.ifnes' directive"); |
4997 | } |
4998 | |
4999 | Lex(); |
5000 | |
5001 | if (Lexer.isNot(AsmToken::String)) { |
5002 | if (ExpectEqual) |
5003 | return TokError("expected string parameter for '.ifeqs' directive"); |
5004 | return TokError("expected string parameter for '.ifnes' directive"); |
5005 | } |
5006 | |
5007 | StringRef String2 = getTok().getStringContents(); |
5008 | Lex(); |
5009 | |
5010 | TheCondStack.push_back(TheCondState); |
5011 | TheCondState.TheCond = AsmCond::IfCond; |
5012 | TheCondState.CondMet = ExpectEqual == (String1 == String2); |
5013 | TheCondState.Ignore = !TheCondState.CondMet; |
5014 | |
5015 | return false; |
5016 | } |
5017 | |
5018 | /// parseDirectiveIfdef |
5019 | /// ::= .ifdef symbol |
5020 | bool AsmParser::parseDirectiveIfdef(SMLoc DirectiveLoc, bool expect_defined) { |
5021 | StringRef Name; |
5022 | TheCondStack.push_back(TheCondState); |
5023 | TheCondState.TheCond = AsmCond::IfCond; |
5024 | |
5025 | if (TheCondState.Ignore) { |
5026 | eatToEndOfStatement(); |
5027 | } else { |
5028 | if (check(parseIdentifier(Name), "expected identifier after '.ifdef'") || |
5029 | parseToken(AsmToken::EndOfStatement, "unexpected token in '.ifdef'")) |
5030 | return true; |
5031 | |
5032 | MCSymbol *Sym = getContext().lookupSymbol(Name); |
5033 | |
5034 | if (expect_defined) |
5035 | TheCondState.CondMet = (Sym && !Sym->isUndefined()); |
5036 | else |
5037 | TheCondState.CondMet = (!Sym || Sym->isUndefined()); |
5038 | TheCondState.Ignore = !TheCondState.CondMet; |
5039 | } |
5040 | |
5041 | return false; |
5042 | } |
5043 | |
5044 | /// parseDirectiveElseIf |
5045 | /// ::= .elseif expression |
5046 | bool AsmParser::parseDirectiveElseIf(SMLoc DirectiveLoc) { |
5047 | if (TheCondState.TheCond != AsmCond::IfCond && |
5048 | TheCondState.TheCond != AsmCond::ElseIfCond) |
5049 | return Error(DirectiveLoc, "Encountered a .elseif that doesn't follow an" |
5050 | " .if or an .elseif"); |
5051 | TheCondState.TheCond = AsmCond::ElseIfCond; |
5052 | |
5053 | bool LastIgnoreState = false; |
5054 | if (!TheCondStack.empty()) |
5055 | LastIgnoreState = TheCondStack.back().Ignore; |
5056 | if (LastIgnoreState || TheCondState.CondMet) { |
5057 | TheCondState.Ignore = true; |
5058 | eatToEndOfStatement(); |
5059 | } else { |
5060 | int64_t ExprValue; |
5061 | if (parseAbsoluteExpression(ExprValue)) |
5062 | return true; |
5063 | |
5064 | if (parseToken(AsmToken::EndOfStatement, |
5065 | "unexpected token in '.elseif' directive")) |
5066 | return true; |
5067 | |
5068 | TheCondState.CondMet = ExprValue; |
5069 | TheCondState.Ignore = !TheCondState.CondMet; |
5070 | } |
5071 | |
5072 | return false; |
5073 | } |
5074 | |
5075 | /// parseDirectiveElse |
5076 | /// ::= .else |
5077 | bool AsmParser::parseDirectiveElse(SMLoc DirectiveLoc) { |
5078 | if (parseToken(AsmToken::EndOfStatement, |
5079 | "unexpected token in '.else' directive")) |
5080 | return true; |
5081 | |
5082 | if (TheCondState.TheCond != AsmCond::IfCond && |
5083 | TheCondState.TheCond != AsmCond::ElseIfCond) |
5084 | return Error(DirectiveLoc, "Encountered a .else that doesn't follow " |
5085 | " an .if or an .elseif"); |
5086 | TheCondState.TheCond = AsmCond::ElseCond; |
5087 | bool LastIgnoreState = false; |
5088 | if (!TheCondStack.empty()) |
5089 | LastIgnoreState = TheCondStack.back().Ignore; |
5090 | if (LastIgnoreState || TheCondState.CondMet) |
5091 | TheCondState.Ignore = true; |
5092 | else |
5093 | TheCondState.Ignore = false; |
5094 | |
5095 | return false; |
5096 | } |
5097 | |
5098 | /// parseDirectiveEnd |
5099 | /// ::= .end |
5100 | bool AsmParser::parseDirectiveEnd(SMLoc DirectiveLoc) { |
5101 | if (parseToken(AsmToken::EndOfStatement, |
5102 | "unexpected token in '.end' directive")) |
5103 | return true; |
5104 | |
5105 | while (Lexer.isNot(AsmToken::Eof)) |
5106 | Lexer.Lex(); |
5107 | |
5108 | return false; |
5109 | } |
5110 | |
5111 | /// parseDirectiveError |
5112 | /// ::= .err |
5113 | /// ::= .error [string] |
5114 | bool AsmParser::parseDirectiveError(SMLoc L, bool WithMessage) { |
5115 | if (!TheCondStack.empty()) { |
5116 | if (TheCondStack.back().Ignore) { |
5117 | eatToEndOfStatement(); |
5118 | return false; |
5119 | } |
5120 | } |
5121 | |
5122 | if (!WithMessage) |
5123 | return Error(L, ".err encountered"); |
5124 | |
5125 | StringRef Message = ".error directive invoked in source file"; |
5126 | if (Lexer.isNot(AsmToken::EndOfStatement)) { |
5127 | if (Lexer.isNot(AsmToken::String)) |
5128 | return TokError(".error argument must be a string"); |
5129 | |
5130 | Message = getTok().getStringContents(); |
5131 | Lex(); |
5132 | } |
5133 | |
5134 | return Error(L, Message); |
5135 | } |
5136 | |
5137 | /// parseDirectiveWarning |
5138 | /// ::= .warning [string] |
5139 | bool AsmParser::parseDirectiveWarning(SMLoc L) { |
5140 | if (!TheCondStack.empty()) { |
5141 | if (TheCondStack.back().Ignore) { |
5142 | eatToEndOfStatement(); |
5143 | return false; |
5144 | } |
5145 | } |
5146 | |
5147 | StringRef Message = ".warning directive invoked in source file"; |
5148 | |
5149 | if (!parseOptionalToken(AsmToken::EndOfStatement)) { |
5150 | if (Lexer.isNot(AsmToken::String)) |
5151 | return TokError(".warning argument must be a string"); |
5152 | |
5153 | Message = getTok().getStringContents(); |
5154 | Lex(); |
5155 | if (parseToken(AsmToken::EndOfStatement, |
5156 | "expected end of statement in '.warning' directive")) |
5157 | return true; |
5158 | } |
5159 | |
5160 | return Warning(L, Message); |
5161 | } |
5162 | |
5163 | /// parseDirectiveEndIf |
5164 | /// ::= .endif |
5165 | bool AsmParser::parseDirectiveEndIf(SMLoc DirectiveLoc) { |
5166 | if (parseToken(AsmToken::EndOfStatement, |
5167 | "unexpected token in '.endif' directive")) |
5168 | return true; |
5169 | |
5170 | if ((TheCondState.TheCond == AsmCond::NoCond) || TheCondStack.empty()) |
5171 | return Error(DirectiveLoc, "Encountered a .endif that doesn't follow " |
5172 | "an .if or .else"); |
5173 | if (!TheCondStack.empty()) { |
5174 | TheCondState = TheCondStack.back(); |
5175 | TheCondStack.pop_back(); |
5176 | } |
5177 | |
5178 | return false; |
5179 | } |
5180 | |
5181 | void AsmParser::initializeDirectiveKindMap() { |
5182 | DirectiveKindMap[".set"] = DK_SET; |
5183 | DirectiveKindMap[".equ"] = DK_EQU; |
5184 | DirectiveKindMap[".equiv"] = DK_EQUIV; |
5185 | DirectiveKindMap[".ascii"] = DK_ASCII; |
5186 | DirectiveKindMap[".asciz"] = DK_ASCIZ; |
5187 | DirectiveKindMap[".string"] = DK_STRING; |
5188 | DirectiveKindMap[".byte"] = DK_BYTE; |
5189 | DirectiveKindMap[".short"] = DK_SHORT; |
5190 | DirectiveKindMap[".value"] = DK_VALUE; |
5191 | DirectiveKindMap[".2byte"] = DK_2BYTE; |
5192 | DirectiveKindMap[".long"] = DK_LONG; |
5193 | DirectiveKindMap[".int"] = DK_INT; |
5194 | DirectiveKindMap[".4byte"] = DK_4BYTE; |
5195 | DirectiveKindMap[".quad"] = DK_QUAD; |
5196 | DirectiveKindMap[".8byte"] = DK_8BYTE; |
5197 | DirectiveKindMap[".octa"] = DK_OCTA; |
5198 | DirectiveKindMap[".single"] = DK_SINGLE; |
5199 | DirectiveKindMap[".float"] = DK_FLOAT; |
5200 | DirectiveKindMap[".double"] = DK_DOUBLE; |
5201 | DirectiveKindMap[".align"] = DK_ALIGN; |
5202 | DirectiveKindMap[".align32"] = DK_ALIGN32; |
5203 | DirectiveKindMap[".balign"] = DK_BALIGN; |
5204 | DirectiveKindMap[".balignw"] = DK_BALIGNW; |
5205 | DirectiveKindMap[".balignl"] = DK_BALIGNL; |
5206 | DirectiveKindMap[".p2align"] = DK_P2ALIGN; |
5207 | DirectiveKindMap[".p2alignw"] = DK_P2ALIGNW; |
5208 | DirectiveKindMap[".p2alignl"] = DK_P2ALIGNL; |
5209 | DirectiveKindMap[".org"] = DK_ORG; |
5210 | DirectiveKindMap[".fill"] = DK_FILL; |
5211 | DirectiveKindMap[".zero"] = DK_ZERO; |
5212 | DirectiveKindMap[".extern"] = DK_EXTERN; |
5213 | DirectiveKindMap[".globl"] = DK_GLOBL; |
5214 | DirectiveKindMap[".global"] = DK_GLOBAL; |
5215 | DirectiveKindMap[".lazy_reference"] = DK_LAZY_REFERENCE; |
5216 | DirectiveKindMap[".no_dead_strip"] = DK_NO_DEAD_STRIP; |
5217 | DirectiveKindMap[".symbol_resolver"] = DK_SYMBOL_RESOLVER; |
5218 | DirectiveKindMap[".private_extern"] = DK_PRIVATE_EXTERN; |
5219 | DirectiveKindMap[".reference"] = DK_REFERENCE; |
5220 | DirectiveKindMap[".weak_definition"] = DK_WEAK_DEFINITION; |
5221 | DirectiveKindMap[".weak_reference"] = DK_WEAK_REFERENCE; |
5222 | DirectiveKindMap[".weak_def_can_be_hidden"] = DK_WEAK_DEF_CAN_BE_HIDDEN; |
5223 | DirectiveKindMap[".comm"] = DK_COMM; |
5224 | DirectiveKindMap[".common"] = DK_COMMON; |
5225 | DirectiveKindMap[".lcomm"] = DK_LCOMM; |
5226 | DirectiveKindMap[".abort"] = DK_ABORT; |
5227 | DirectiveKindMap[".include"] = DK_INCLUDE; |
5228 | DirectiveKindMap[".incbin"] = DK_INCBIN; |
5229 | DirectiveKindMap[".code16"] = DK_CODE16; |
5230 | DirectiveKindMap[".code16gcc"] = DK_CODE16GCC; |
5231 | DirectiveKindMap[".rept"] = DK_REPT; |
5232 | DirectiveKindMap[".rep"] = DK_REPT; |
5233 | DirectiveKindMap[".irp"] = DK_IRP; |
5234 | DirectiveKindMap[".irpc"] = DK_IRPC; |
5235 | DirectiveKindMap[".endr"] = DK_ENDR; |
5236 | DirectiveKindMap[".bundle_align_mode"] = DK_BUNDLE_ALIGN_MODE; |
5237 | DirectiveKindMap[".bundle_lock"] = DK_BUNDLE_LOCK; |
5238 | DirectiveKindMap[".bundle_unlock"] = DK_BUNDLE_UNLOCK; |
5239 | DirectiveKindMap[".if"] = DK_IF; |
5240 | DirectiveKindMap[".ifeq"] = DK_IFEQ; |
5241 | DirectiveKindMap[".ifge"] = DK_IFGE; |
5242 | DirectiveKindMap[".ifgt"] = DK_IFGT; |
5243 | DirectiveKindMap[".ifle"] = DK_IFLE; |
5244 | DirectiveKindMap[".iflt"] = DK_IFLT; |
5245 | DirectiveKindMap[".ifne"] = DK_IFNE; |
5246 | DirectiveKindMap[".ifb"] = DK_IFB; |
5247 | DirectiveKindMap[".ifnb"] = DK_IFNB; |
5248 | DirectiveKindMap[".ifc"] = DK_IFC; |
5249 | DirectiveKindMap[".ifeqs"] = DK_IFEQS; |
5250 | DirectiveKindMap[".ifnc"] = DK_IFNC; |
5251 | DirectiveKindMap[".ifnes"] = DK_IFNES; |
5252 | DirectiveKindMap[".ifdef"] = DK_IFDEF; |
5253 | DirectiveKindMap[".ifndef"] = DK_IFNDEF; |
5254 | DirectiveKindMap[".ifnotdef"] = DK_IFNOTDEF; |
5255 | DirectiveKindMap[".elseif"] = DK_ELSEIF; |
5256 | DirectiveKindMap[".else"] = DK_ELSE; |
5257 | DirectiveKindMap[".end"] = DK_END; |
5258 | DirectiveKindMap[".endif"] = DK_ENDIF; |
5259 | DirectiveKindMap[".skip"] = DK_SKIP; |
5260 | DirectiveKindMap[".space"] = DK_SPACE; |
5261 | DirectiveKindMap[".file"] = DK_FILE; |
5262 | DirectiveKindMap[".line"] = DK_LINE; |
5263 | DirectiveKindMap[".loc"] = DK_LOC; |
5264 | DirectiveKindMap[".stabs"] = DK_STABS; |
5265 | DirectiveKindMap[".cv_file"] = DK_CV_FILE; |
5266 | DirectiveKindMap[".cv_func_id"] = DK_CV_FUNC_ID; |
5267 | DirectiveKindMap[".cv_loc"] = DK_CV_LOC; |
5268 | DirectiveKindMap[".cv_linetable"] = DK_CV_LINETABLE; |
5269 | DirectiveKindMap[".cv_inline_linetable"] = DK_CV_INLINE_LINETABLE; |
5270 | DirectiveKindMap[".cv_inline_site_id"] = DK_CV_INLINE_SITE_ID; |
5271 | DirectiveKindMap[".cv_def_range"] = DK_CV_DEF_RANGE; |
5272 | DirectiveKindMap[".cv_string"] = DK_CV_STRING; |
5273 | DirectiveKindMap[".cv_stringtable"] = DK_CV_STRINGTABLE; |
5274 | DirectiveKindMap[".cv_filechecksums"] = DK_CV_FILECHECKSUMS; |
5275 | DirectiveKindMap[".cv_filechecksumoffset"] = DK_CV_FILECHECKSUM_OFFSET; |
5276 | DirectiveKindMap[".cv_fpo_data"] = DK_CV_FPO_DATA; |
5277 | DirectiveKindMap[".sleb128"] = DK_SLEB128; |
5278 | DirectiveKindMap[".uleb128"] = DK_ULEB128; |
5279 | DirectiveKindMap[".cfi_sections"] = DK_CFI_SECTIONS; |
5280 | DirectiveKindMap[".cfi_startproc"] = DK_CFI_STARTPROC; |
5281 | DirectiveKindMap[".cfi_endproc"] = DK_CFI_ENDPROC; |
5282 | DirectiveKindMap[".cfi_def_cfa"] = DK_CFI_DEF_CFA; |
5283 | DirectiveKindMap[".cfi_def_cfa_offset"] = DK_CFI_DEF_CFA_OFFSET; |
5284 | DirectiveKindMap[".cfi_adjust_cfa_offset"] = DK_CFI_ADJUST_CFA_OFFSET; |
5285 | DirectiveKindMap[".cfi_def_cfa_register"] = DK_CFI_DEF_CFA_REGISTER; |
5286 | DirectiveKindMap[".cfi_offset"] = DK_CFI_OFFSET; |
5287 | DirectiveKindMap[".cfi_rel_offset"] = DK_CFI_REL_OFFSET; |
5288 | DirectiveKindMap[".cfi_personality"] = DK_CFI_PERSONALITY; |
5289 | DirectiveKindMap[".cfi_lsda"] = DK_CFI_LSDA; |
5290 | DirectiveKindMap[".cfi_remember_state"] = DK_CFI_REMEMBER_STATE; |
5291 | DirectiveKindMap[".cfi_restore_state"] = DK_CFI_RESTORE_STATE; |
5292 | DirectiveKindMap[".cfi_same_value"] = DK_CFI_SAME_VALUE; |
5293 | DirectiveKindMap[".cfi_restore"] = DK_CFI_RESTORE; |
5294 | DirectiveKindMap[".cfi_escape"] = DK_CFI_ESCAPE; |
5295 | DirectiveKindMap[".cfi_return_column"] = DK_CFI_RETURN_COLUMN; |
5296 | DirectiveKindMap[".cfi_signal_frame"] = DK_CFI_SIGNAL_FRAME; |
5297 | DirectiveKindMap[".cfi_undefined"] = DK_CFI_UNDEFINED; |
5298 | DirectiveKindMap[".cfi_register"] = DK_CFI_REGISTER; |
5299 | DirectiveKindMap[".cfi_window_save"] = DK_CFI_WINDOW_SAVE; |
5300 | DirectiveKindMap[".cfi_b_key_frame"] = DK_CFI_B_KEY_FRAME; |
5301 | DirectiveKindMap[".macros_on"] = DK_MACROS_ON; |
5302 | DirectiveKindMap[".macros_off"] = DK_MACROS_OFF; |
5303 | DirectiveKindMap[".macro"] = DK_MACRO; |
5304 | DirectiveKindMap[".exitm"] = DK_EXITM; |
5305 | DirectiveKindMap[".endm"] = DK_ENDM; |
5306 | DirectiveKindMap[".endmacro"] = DK_ENDMACRO; |
5307 | DirectiveKindMap[".purgem"] = DK_PURGEM; |
5308 | DirectiveKindMap[".err"] = DK_ERR; |
5309 | DirectiveKindMap[".error"] = DK_ERROR; |
5310 | DirectiveKindMap[".warning"] = DK_WARNING; |
5311 | DirectiveKindMap[".altmacro"] = DK_ALTMACRO; |
5312 | DirectiveKindMap[".noaltmacro"] = DK_NOALTMACRO; |
5313 | DirectiveKindMap[".reloc"] = DK_RELOC; |
5314 | DirectiveKindMap[".dc"] = DK_DC; |
5315 | DirectiveKindMap[".dc.a"] = DK_DC_A; |
5316 | DirectiveKindMap[".dc.b"] = DK_DC_B; |
5317 | DirectiveKindMap[".dc.d"] = DK_DC_D; |
5318 | DirectiveKindMap[".dc.l"] = DK_DC_L; |
5319 | DirectiveKindMap[".dc.s"] = DK_DC_S; |
5320 | DirectiveKindMap[".dc.w"] = DK_DC_W; |
5321 | DirectiveKindMap[".dc.x"] = DK_DC_X; |
5322 | DirectiveKindMap[".dcb"] = DK_DCB; |
5323 | DirectiveKindMap[".dcb.b"] = DK_DCB_B; |
5324 | DirectiveKindMap[".dcb.d"] = DK_DCB_D; |
5325 | DirectiveKindMap[".dcb.l"] = DK_DCB_L; |
5326 | DirectiveKindMap[".dcb.s"] = DK_DCB_S; |
5327 | DirectiveKindMap[".dcb.w"] = DK_DCB_W; |
5328 | DirectiveKindMap[".dcb.x"] = DK_DCB_X; |
5329 | DirectiveKindMap[".ds"] = DK_DS; |
5330 | DirectiveKindMap[".ds.b"] = DK_DS_B; |
5331 | DirectiveKindMap[".ds.d"] = DK_DS_D; |
5332 | DirectiveKindMap[".ds.l"] = DK_DS_L; |
5333 | DirectiveKindMap[".ds.p"] = DK_DS_P; |
5334 | DirectiveKindMap[".ds.s"] = DK_DS_S; |
5335 | DirectiveKindMap[".ds.w"] = DK_DS_W; |
5336 | DirectiveKindMap[".ds.x"] = DK_DS_X; |
5337 | DirectiveKindMap[".print"] = DK_PRINT; |
5338 | DirectiveKindMap[".addrsig"] = DK_ADDRSIG; |
5339 | DirectiveKindMap[".addrsig_sym"] = DK_ADDRSIG_SYM; |
5340 | } |
5341 | |
5342 | MCAsmMacro *AsmParser::parseMacroLikeBody(SMLoc DirectiveLoc) { |
5343 | AsmToken EndToken, StartToken = getTok(); |
5344 | |
5345 | unsigned NestLevel = 0; |
5346 | while (true) { |
5347 | // Check whether we have reached the end of the file. |
5348 | if (getLexer().is(AsmToken::Eof)) { |
5349 | printError(DirectiveLoc, "no matching '.endr' in definition"); |
5350 | return nullptr; |
5351 | } |
5352 | |
5353 | if (Lexer.is(AsmToken::Identifier) && |
5354 | (getTok().getIdentifier() == ".rep" || |
5355 | getTok().getIdentifier() == ".rept" || |
5356 | getTok().getIdentifier() == ".irp" || |
5357 | getTok().getIdentifier() == ".irpc")) { |
5358 | ++NestLevel; |
5359 | } |
5360 | |
5361 | // Otherwise, check whether we have reached the .endr. |
5362 | if (Lexer.is(AsmToken::Identifier) && getTok().getIdentifier() == ".endr") { |
5363 | if (NestLevel == 0) { |
5364 | EndToken = getTok(); |
5365 | Lex(); |
5366 | if (Lexer.isNot(AsmToken::EndOfStatement)) { |
5367 | printError(getTok().getLoc(), |
5368 | "unexpected token in '.endr' directive"); |
5369 | return nullptr; |
5370 | } |
5371 | break; |
5372 | } |
5373 | --NestLevel; |
5374 | } |
5375 | |
5376 | // Otherwise, scan till the end of the statement. |
5377 | eatToEndOfStatement(); |
5378 | } |
5379 | |
5380 | const char *BodyStart = StartToken.getLoc().getPointer(); |
5381 | const char *BodyEnd = EndToken.getLoc().getPointer(); |
5382 | StringRef Body = StringRef(BodyStart, BodyEnd - BodyStart); |
5383 | |
5384 | // We Are Anonymous. |
5385 | MacroLikeBodies.emplace_back(StringRef(), Body, MCAsmMacroParameters()); |
5386 | return &MacroLikeBodies.back(); |
5387 | } |
5388 | |
5389 | void AsmParser::instantiateMacroLikeBody(MCAsmMacro *M, SMLoc DirectiveLoc, |
5390 | raw_svector_ostream &OS) { |
5391 | OS << ".endr\n"; |
5392 | |
5393 | std::unique_ptr<MemoryBuffer> Instantiation = |
5394 | MemoryBuffer::getMemBufferCopy(OS.str(), "<instantiation>"); |
5395 | |
5396 | // Create the macro instantiation object and add to the current macro |
5397 | // instantiation stack. |
5398 | MacroInstantiation *MI = new MacroInstantiation( |
5399 | DirectiveLoc, CurBuffer, getTok().getLoc(), TheCondStack.size()); |
5400 | ActiveMacros.push_back(MI); |
5401 | |
5402 | // Jump to the macro instantiation and prime the lexer. |
5403 | CurBuffer = SrcMgr.AddNewSourceBuffer(std::move(Instantiation), SMLoc()); |
5404 | Lexer.setBuffer(SrcMgr.getMemoryBuffer(CurBuffer)->getBuffer()); |
5405 | Lex(); |
5406 | } |
5407 | |
5408 | /// parseDirectiveRept |
5409 | /// ::= .rep | .rept count |
5410 | bool AsmParser::parseDirectiveRept(SMLoc DirectiveLoc, StringRef Dir) { |
5411 | const MCExpr *CountExpr; |
5412 | SMLoc CountLoc = getTok().getLoc(); |
5413 | if (parseExpression(CountExpr)) |
5414 | return true; |
5415 | |
5416 | int64_t Count; |
5417 | if (!CountExpr->evaluateAsAbsolute(Count, getStreamer().getAssemblerPtr())) { |
5418 | return Error(CountLoc, "unexpected token in '" + Dir + "' directive"); |
5419 | } |
5420 | |
5421 | if (check(Count < 0, CountLoc, "Count is negative") || |
5422 | parseToken(AsmToken::EndOfStatement, |
5423 | "unexpected token in '" + Dir + "' directive")) |
5424 | return true; |
5425 | |
5426 | // Lex the rept definition. |
5427 | MCAsmMacro *M = parseMacroLikeBody(DirectiveLoc); |
5428 | if (!M) |
5429 | return true; |
5430 | |
5431 | // Macro instantiation is lexical, unfortunately. We construct a new buffer |
5432 | // to hold the macro body with substitutions. |
5433 | SmallString<256> Buf; |
5434 | raw_svector_ostream OS(Buf); |
5435 | while (Count--) { |
5436 | // Note that the AtPseudoVariable is disabled for instantiations of .rep(t). |
5437 | if (expandMacro(OS, M->Body, None, None, false, getTok().getLoc())) |
5438 | return true; |
5439 | } |
5440 | instantiateMacroLikeBody(M, DirectiveLoc, OS); |
5441 | |
5442 | return false; |
5443 | } |
5444 | |
5445 | /// parseDirectiveIrp |
5446 | /// ::= .irp symbol,values |
5447 | bool AsmParser::parseDirectiveIrp(SMLoc DirectiveLoc) { |
5448 | MCAsmMacroParameter Parameter; |
5449 | MCAsmMacroArguments A; |
5450 | if (check(parseIdentifier(Parameter.Name), |
5451 | "expected identifier in '.irp' directive") || |
5452 | parseToken(AsmToken::Comma, "expected comma in '.irp' directive") || |
5453 | parseMacroArguments(nullptr, A) || |
5454 | parseToken(AsmToken::EndOfStatement, "expected End of Statement")) |
5455 | return true; |
5456 | |
5457 | // Lex the irp definition. |
5458 | MCAsmMacro *M = parseMacroLikeBody(DirectiveLoc); |
5459 | if (!M) |
5460 | return true; |
5461 | |
5462 | // Macro instantiation is lexical, unfortunately. We construct a new buffer |
5463 | // to hold the macro body with substitutions. |
5464 | SmallString<256> Buf; |
5465 | raw_svector_ostream OS(Buf); |
5466 | |
5467 | for (const MCAsmMacroArgument &Arg : A) { |
5468 | // Note that the AtPseudoVariable is enabled for instantiations of .irp. |
5469 | // This is undocumented, but GAS seems to support it. |
5470 | if (expandMacro(OS, M->Body, Parameter, Arg, true, getTok().getLoc())) |
5471 | return true; |
5472 | } |
5473 | |
5474 | instantiateMacroLikeBody(M, DirectiveLoc, OS); |
5475 | |
5476 | return false; |
5477 | } |
5478 | |
5479 | /// parseDirectiveIrpc |
5480 | /// ::= .irpc symbol,values |
5481 | bool AsmParser::parseDirectiveIrpc(SMLoc DirectiveLoc) { |
5482 | MCAsmMacroParameter Parameter; |
5483 | MCAsmMacroArguments A; |
5484 | |
5485 | if (check(parseIdentifier(Parameter.Name), |
5486 | "expected identifier in '.irpc' directive") || |
5487 | parseToken(AsmToken::Comma, "expected comma in '.irpc' directive") || |
5488 | parseMacroArguments(nullptr, A)) |
5489 | return true; |
5490 | |
5491 | if (A.size() != 1 || A.front().size() != 1) |
5492 | return TokError("unexpected token in '.irpc' directive"); |
5493 | |
5494 | // Eat the end of statement. |
5495 | if (parseToken(AsmToken::EndOfStatement, "expected end of statement")) |
5496 | return true; |
5497 | |
5498 | // Lex the irpc definition. |
5499 | MCAsmMacro *M = parseMacroLikeBody(DirectiveLoc); |
5500 | if (!M) |
5501 | return true; |
5502 | |
5503 | // Macro instantiation is lexical, unfortunately. We construct a new buffer |
5504 | // to hold the macro body with substitutions. |
5505 | SmallString<256> Buf; |
5506 | raw_svector_ostream OS(Buf); |
5507 | |
5508 | StringRef Values = A.front().front().getString(); |
5509 | for (std::size_t I = 0, End = Values.size(); I != End; ++I) { |
5510 | MCAsmMacroArgument Arg; |
5511 | Arg.emplace_back(AsmToken::Identifier, Values.slice(I, I + 1)); |
5512 | |
5513 | // Note that the AtPseudoVariable is enabled for instantiations of .irpc. |
5514 | // This is undocumented, but GAS seems to support it. |
5515 | if (expandMacro(OS, M->Body, Parameter, Arg, true, getTok().getLoc())) |
5516 | return true; |
5517 | } |
5518 | |
5519 | instantiateMacroLikeBody(M, DirectiveLoc, OS); |
5520 | |
5521 | return false; |
5522 | } |
5523 | |
5524 | bool AsmParser::parseDirectiveEndr(SMLoc DirectiveLoc) { |
5525 | if (ActiveMacros.empty()) |
5526 | return TokError("unmatched '.endr' directive"); |
5527 | |
5528 | // The only .repl that should get here are the ones created by |
5529 | // instantiateMacroLikeBody. |
5530 | assert(getLexer().is(AsmToken::EndOfStatement))((getLexer().is(AsmToken::EndOfStatement)) ? static_cast<void > (0) : __assert_fail ("getLexer().is(AsmToken::EndOfStatement)" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/MC/MCParser/AsmParser.cpp" , 5530, __PRETTY_FUNCTION__)); |
5531 | |
5532 | handleMacroExit(); |
5533 | return false; |
5534 | } |
5535 | |
5536 | bool AsmParser::parseDirectiveMSEmit(SMLoc IDLoc, ParseStatementInfo &Info, |
5537 | size_t Len) { |
5538 | const MCExpr *Value; |
5539 | SMLoc ExprLoc = getLexer().getLoc(); |
5540 | if (parseExpression(Value)) |
5541 | return true; |
5542 | const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Value); |
5543 | if (!MCE) |
5544 | return Error(ExprLoc, "unexpected expression in _emit"); |
5545 | uint64_t IntValue = MCE->getValue(); |
5546 | if (!isUInt<8>(IntValue) && !isInt<8>(IntValue)) |
5547 | return Error(ExprLoc, "literal value out of range for directive"); |
5548 | |
5549 | Info.AsmRewrites->emplace_back(AOK_Emit, IDLoc, Len); |
5550 | return false; |
5551 | } |
5552 | |
5553 | bool AsmParser::parseDirectiveMSAlign(SMLoc IDLoc, ParseStatementInfo &Info) { |
5554 | const MCExpr *Value; |
5555 | SMLoc ExprLoc = getLexer().getLoc(); |
5556 | if (parseExpression(Value)) |
5557 | return true; |
5558 | const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Value); |
5559 | if (!MCE) |
5560 | return Error(ExprLoc, "unexpected expression in align"); |
5561 | uint64_t IntValue = MCE->getValue(); |
5562 | if (!isPowerOf2_64(IntValue)) |
5563 | return Error(ExprLoc, "literal value not a power of two greater then zero"); |
5564 | |
5565 | Info.AsmRewrites->emplace_back(AOK_Align, IDLoc, 5, Log2_64(IntValue)); |
5566 | return false; |
5567 | } |
5568 | |
5569 | bool AsmParser::parseDirectivePrint(SMLoc DirectiveLoc) { |
5570 | const AsmToken StrTok = getTok(); |
5571 | Lex(); |
5572 | if (StrTok.isNot(AsmToken::String) || StrTok.getString().front() != '"') |
5573 | return Error(DirectiveLoc, "expected double quoted string after .print"); |
5574 | if (parseToken(AsmToken::EndOfStatement, "expected end of statement")) |
5575 | return true; |
5576 | llvm::outs() << StrTok.getStringContents() << '\n'; |
5577 | return false; |
5578 | } |
5579 | |
5580 | bool AsmParser::parseDirectiveAddrsig() { |
5581 | getStreamer().EmitAddrsig(); |
5582 | return false; |
5583 | } |
5584 | |
5585 | bool AsmParser::parseDirectiveAddrsigSym() { |
5586 | StringRef Name; |
5587 | if (check(parseIdentifier(Name), |
5588 | "expected identifier in '.addrsig_sym' directive")) |
5589 | return true; |
5590 | MCSymbol *Sym = getContext().getOrCreateSymbol(Name); |
5591 | getStreamer().EmitAddrsigSym(Sym); |
5592 | return false; |
5593 | } |
5594 | |
5595 | // We are comparing pointers, but the pointers are relative to a single string. |
5596 | // Thus, this should always be deterministic. |
5597 | static int rewritesSort(const AsmRewrite *AsmRewriteA, |
5598 | const AsmRewrite *AsmRewriteB) { |
5599 | if (AsmRewriteA->Loc.getPointer() < AsmRewriteB->Loc.getPointer()) |
5600 | return -1; |
5601 | if (AsmRewriteB->Loc.getPointer() < AsmRewriteA->Loc.getPointer()) |
5602 | return 1; |
5603 | |
5604 | // It's possible to have a SizeDirective, Imm/ImmPrefix and an Input/Output |
5605 | // rewrite to the same location. Make sure the SizeDirective rewrite is |
5606 | // performed first, then the Imm/ImmPrefix and finally the Input/Output. This |
5607 | // ensures the sort algorithm is stable. |
5608 | if (AsmRewritePrecedence[AsmRewriteA->Kind] > |
5609 | AsmRewritePrecedence[AsmRewriteB->Kind]) |
5610 | return -1; |
5611 | |
5612 | if (AsmRewritePrecedence[AsmRewriteA->Kind] < |
5613 | AsmRewritePrecedence[AsmRewriteB->Kind]) |
5614 | return 1; |
5615 | llvm_unreachable("Unstable rewrite sort.")::llvm::llvm_unreachable_internal("Unstable rewrite sort.", "/build/llvm-toolchain-snapshot-8~svn350071/lib/MC/MCParser/AsmParser.cpp" , 5615); |
5616 | } |
5617 | |
5618 | bool AsmParser::parseMSInlineAsm( |
5619 | void *AsmLoc, std::string &AsmString, unsigned &NumOutputs, |
5620 | unsigned &NumInputs, SmallVectorImpl<std::pair<void *, bool>> &OpDecls, |
5621 | SmallVectorImpl<std::string> &Constraints, |
5622 | SmallVectorImpl<std::string> &Clobbers, const MCInstrInfo *MII, |
5623 | const MCInstPrinter *IP, MCAsmParserSemaCallback &SI) { |
5624 | SmallVector<void *, 4> InputDecls; |
5625 | SmallVector<void *, 4> OutputDecls; |
5626 | SmallVector<bool, 4> InputDeclsAddressOf; |
5627 | SmallVector<bool, 4> OutputDeclsAddressOf; |
5628 | SmallVector<std::string, 4> InputConstraints; |
5629 | SmallVector<std::string, 4> OutputConstraints; |
5630 | SmallVector<unsigned, 4> ClobberRegs; |
5631 | |
5632 | SmallVector<AsmRewrite, 4> AsmStrRewrites; |
5633 | |
5634 | // Prime the lexer. |
5635 | Lex(); |
5636 | |
5637 | // While we have input, parse each statement. |
5638 | unsigned InputIdx = 0; |
5639 | unsigned OutputIdx = 0; |
5640 | while (getLexer().isNot(AsmToken::Eof)) { |
5641 | // Parse curly braces marking block start/end |
5642 | if (parseCurlyBlockScope(AsmStrRewrites)) |
5643 | continue; |
5644 | |
5645 | ParseStatementInfo Info(&AsmStrRewrites); |
5646 | bool StatementErr = parseStatement(Info, &SI); |
5647 | |
5648 | if (StatementErr || Info.ParseError) { |
5649 | // Emit pending errors if any exist. |
5650 | printPendingErrors(); |
5651 | return true; |
5652 | } |
5653 | |
5654 | // No pending error should exist here. |
5655 | assert(!hasPendingError() && "unexpected error from parseStatement")((!hasPendingError() && "unexpected error from parseStatement" ) ? static_cast<void> (0) : __assert_fail ("!hasPendingError() && \"unexpected error from parseStatement\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/MC/MCParser/AsmParser.cpp" , 5655, __PRETTY_FUNCTION__)); |
5656 | |
5657 | if (Info.Opcode == ~0U) |
5658 | continue; |
5659 | |
5660 | const MCInstrDesc &Desc = MII->get(Info.Opcode); |
5661 | |
5662 | // Build the list of clobbers, outputs and inputs. |
5663 | for (unsigned i = 1, e = Info.ParsedOperands.size(); i != e; ++i) { |
5664 | MCParsedAsmOperand &Operand = *Info.ParsedOperands[i]; |
5665 | |
5666 | // Immediate. |
5667 | if (Operand.isImm()) |
5668 | continue; |
5669 | |
5670 | // Register operand. |
5671 | if (Operand.isReg() && !Operand.needAddressOf() && |
5672 | !getTargetParser().OmitRegisterFromClobberLists(Operand.getReg())) { |
5673 | unsigned NumDefs = Desc.getNumDefs(); |
5674 | // Clobber. |
5675 | if (NumDefs && Operand.getMCOperandNum() < NumDefs) |
5676 | ClobberRegs.push_back(Operand.getReg()); |
5677 | continue; |
5678 | } |
5679 | |
5680 | // Expr/Input or Output. |
5681 | StringRef SymName = Operand.getSymName(); |
5682 | if (SymName.empty()) |
5683 | continue; |
5684 | |
5685 | void *OpDecl = Operand.getOpDecl(); |
5686 | if (!OpDecl) |
5687 | continue; |
5688 | |
5689 | bool isOutput = (i == 1) && Desc.mayStore(); |
5690 | SMLoc Start = SMLoc::getFromPointer(SymName.data()); |
5691 | if (isOutput) { |
5692 | ++InputIdx; |
5693 | OutputDecls.push_back(OpDecl); |
5694 | OutputDeclsAddressOf.push_back(Operand.needAddressOf()); |
5695 | OutputConstraints.push_back(("=" + Operand.getConstraint()).str()); |
5696 | AsmStrRewrites.emplace_back(AOK_Output, Start, SymName.size()); |
5697 | } else { |
5698 | InputDecls.push_back(OpDecl); |
5699 | InputDeclsAddressOf.push_back(Operand.needAddressOf()); |
5700 | InputConstraints.push_back(Operand.getConstraint().str()); |
5701 | AsmStrRewrites.emplace_back(AOK_Input, Start, SymName.size()); |
5702 | } |
5703 | } |
5704 | |
5705 | // Consider implicit defs to be clobbers. Think of cpuid and push. |
5706 | ArrayRef<MCPhysReg> ImpDefs(Desc.getImplicitDefs(), |
5707 | Desc.getNumImplicitDefs()); |
5708 | ClobberRegs.insert(ClobberRegs.end(), ImpDefs.begin(), ImpDefs.end()); |
5709 | } |
5710 | |
5711 | // Set the number of Outputs and Inputs. |
5712 | NumOutputs = OutputDecls.size(); |
5713 | NumInputs = InputDecls.size(); |
5714 | |
5715 | // Set the unique clobbers. |
5716 | array_pod_sort(ClobberRegs.begin(), ClobberRegs.end()); |
5717 | ClobberRegs.erase(std::unique(ClobberRegs.begin(), ClobberRegs.end()), |
5718 | ClobberRegs.end()); |
5719 | Clobbers.assign(ClobberRegs.size(), std::string()); |
5720 | for (unsigned I = 0, E = ClobberRegs.size(); I != E; ++I) { |
5721 | raw_string_ostream OS(Clobbers[I]); |
5722 | IP->printRegName(OS, ClobberRegs[I]); |
5723 | } |
5724 | |
5725 | // Merge the various outputs and inputs. Output are expected first. |
5726 | if (NumOutputs || NumInputs) { |
5727 | unsigned NumExprs = NumOutputs + NumInputs; |
5728 | OpDecls.resize(NumExprs); |
5729 | Constraints.resize(NumExprs); |
5730 | for (unsigned i = 0; i < NumOutputs; ++i) { |
5731 | OpDecls[i] = std::make_pair(OutputDecls[i], OutputDeclsAddressOf[i]); |
5732 | Constraints[i] = OutputConstraints[i]; |
5733 | } |
5734 | for (unsigned i = 0, j = NumOutputs; i < NumInputs; ++i, ++j) { |
5735 | OpDecls[j] = std::make_pair(InputDecls[i], InputDeclsAddressOf[i]); |
5736 | Constraints[j] = InputConstraints[i]; |
5737 | } |
5738 | } |
5739 | |
5740 | // Build the IR assembly string. |
5741 | std::string AsmStringIR; |
5742 | raw_string_ostream OS(AsmStringIR); |
5743 | StringRef ASMString = |
5744 | SrcMgr.getMemoryBuffer(SrcMgr.getMainFileID())->getBuffer(); |
5745 | const char *AsmStart = ASMString.begin(); |
5746 | const char *AsmEnd = ASMString.end(); |
5747 | array_pod_sort(AsmStrRewrites.begin(), AsmStrRewrites.end(), rewritesSort); |
5748 | for (const AsmRewrite &AR : AsmStrRewrites) { |
5749 | AsmRewriteKind Kind = AR.Kind; |
5750 | |
5751 | const char *Loc = AR.Loc.getPointer(); |
5752 | assert(Loc >= AsmStart && "Expected Loc to be at or after Start!")((Loc >= AsmStart && "Expected Loc to be at or after Start!" ) ? static_cast<void> (0) : __assert_fail ("Loc >= AsmStart && \"Expected Loc to be at or after Start!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/MC/MCParser/AsmParser.cpp" , 5752, __PRETTY_FUNCTION__)); |
5753 | |
5754 | // Emit everything up to the immediate/expression. |
5755 | if (unsigned Len = Loc - AsmStart) |
5756 | OS << StringRef(AsmStart, Len); |
5757 | |
5758 | // Skip the original expression. |
5759 | if (Kind == AOK_Skip) { |
5760 | AsmStart = Loc + AR.Len; |
5761 | continue; |
5762 | } |
5763 | |
5764 | unsigned AdditionalSkip = 0; |
5765 | // Rewrite expressions in $N notation. |
5766 | switch (Kind) { |
5767 | default: |
5768 | break; |
5769 | case AOK_IntelExpr: |
5770 | assert(AR.IntelExp.isValid() && "cannot write invalid intel expression")((AR.IntelExp.isValid() && "cannot write invalid intel expression" ) ? static_cast<void> (0) : __assert_fail ("AR.IntelExp.isValid() && \"cannot write invalid intel expression\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/MC/MCParser/AsmParser.cpp" , 5770, __PRETTY_FUNCTION__)); |
5771 | if (AR.IntelExp.NeedBracs) |
5772 | OS << "["; |
5773 | if (AR.IntelExp.hasBaseReg()) |
5774 | OS << AR.IntelExp.BaseReg; |
5775 | if (AR.IntelExp.hasIndexReg()) |
5776 | OS << (AR.IntelExp.hasBaseReg() ? " + " : "") |
5777 | << AR.IntelExp.IndexReg; |
5778 | if (AR.IntelExp.Scale > 1) |
5779 | OS << " * $$" << AR.IntelExp.Scale; |
5780 | if (AR.IntelExp.Imm || !AR.IntelExp.hasRegs()) |
5781 | OS << (AR.IntelExp.hasRegs() ? " + $$" : "$$") << AR.IntelExp.Imm; |
5782 | if (AR.IntelExp.NeedBracs) |
5783 | OS << "]"; |
5784 | break; |
5785 | case AOK_Label: |
5786 | OS << Ctx.getAsmInfo()->getPrivateLabelPrefix() << AR.Label; |
5787 | break; |
5788 | case AOK_Input: |
5789 | OS << '$' << InputIdx++; |
5790 | break; |
5791 | case AOK_Output: |
5792 | OS << '$' << OutputIdx++; |
5793 | break; |
5794 | case AOK_SizeDirective: |
5795 | switch (AR.Val) { |
5796 | default: break; |
5797 | case 8: OS << "byte ptr "; break; |
5798 | case 16: OS << "word ptr "; break; |
5799 | case 32: OS << "dword ptr "; break; |
5800 | case 64: OS << "qword ptr "; break; |
5801 | case 80: OS << "xword ptr "; break; |
5802 | case 128: OS << "xmmword ptr "; break; |
5803 | case 256: OS << "ymmword ptr "; break; |
5804 | } |
5805 | break; |
5806 | case AOK_Emit: |
5807 | OS << ".byte"; |
5808 | break; |
5809 | case AOK_Align: { |
5810 | // MS alignment directives are measured in bytes. If the native assembler |
5811 | // measures alignment in bytes, we can pass it straight through. |
5812 | OS << ".align"; |
5813 | if (getContext().getAsmInfo()->getAlignmentIsInBytes()) |
5814 | break; |
5815 | |
5816 | // Alignment is in log2 form, so print that instead and skip the original |
5817 | // immediate. |
5818 | unsigned Val = AR.Val; |
5819 | OS << ' ' << Val; |
5820 | assert(Val < 10 && "Expected alignment less then 2^10.")((Val < 10 && "Expected alignment less then 2^10." ) ? static_cast<void> (0) : __assert_fail ("Val < 10 && \"Expected alignment less then 2^10.\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/MC/MCParser/AsmParser.cpp" , 5820, __PRETTY_FUNCTION__)); |
5821 | AdditionalSkip = (Val < 4) ? 2 : Val < 7 ? 3 : 4; |
5822 | break; |
5823 | } |
5824 | case AOK_EVEN: |
5825 | OS << ".even"; |
5826 | break; |
5827 | case AOK_EndOfStatement: |
5828 | OS << "\n\t"; |
5829 | break; |
5830 | } |
5831 | |
5832 | // Skip the original expression. |
5833 | AsmStart = Loc + AR.Len + AdditionalSkip; |
5834 | } |
5835 | |
5836 | // Emit the remainder of the asm string. |
5837 | if (AsmStart != AsmEnd) |
5838 | OS << StringRef(AsmStart, AsmEnd - AsmStart); |
5839 | |
5840 | AsmString = OS.str(); |
5841 | return false; |
5842 | } |
5843 | |
5844 | namespace llvm { |
5845 | namespace MCParserUtils { |
5846 | |
5847 | /// Returns whether the given symbol is used anywhere in the given expression, |
5848 | /// or subexpressions. |
5849 | static bool isSymbolUsedInExpression(const MCSymbol *Sym, const MCExpr *Value) { |
5850 | switch (Value->getKind()) { |
5851 | case MCExpr::Binary: { |
5852 | const MCBinaryExpr *BE = static_cast<const MCBinaryExpr *>(Value); |
5853 | return isSymbolUsedInExpression(Sym, BE->getLHS()) || |
5854 | isSymbolUsedInExpression(Sym, BE->getRHS()); |
5855 | } |
5856 | case MCExpr::Target: |
5857 | case MCExpr::Constant: |
5858 | return false; |
5859 | case MCExpr::SymbolRef: { |
5860 | const MCSymbol &S = |
5861 | static_cast<const MCSymbolRefExpr *>(Value)->getSymbol(); |
5862 | if (S.isVariable()) |
5863 | return isSymbolUsedInExpression(Sym, S.getVariableValue()); |
5864 | return &S == Sym; |
5865 | } |
5866 | case MCExpr::Unary: |
5867 | return isSymbolUsedInExpression( |
5868 | Sym, static_cast<const MCUnaryExpr *>(Value)->getSubExpr()); |
5869 | } |
5870 | |
5871 | llvm_unreachable("Unknown expr kind!")::llvm::llvm_unreachable_internal("Unknown expr kind!", "/build/llvm-toolchain-snapshot-8~svn350071/lib/MC/MCParser/AsmParser.cpp" , 5871); |
5872 | } |
5873 | |
5874 | bool parseAssignmentExpression(StringRef Name, bool allow_redef, |
5875 | MCAsmParser &Parser, MCSymbol *&Sym, |
5876 | const MCExpr *&Value) { |
5877 | |
5878 | // FIXME: Use better location, we should use proper tokens. |
5879 | SMLoc EqualLoc = Parser.getTok().getLoc(); |
5880 | if (Parser.parseExpression(Value)) |
5881 | return Parser.TokError("missing expression"); |
5882 | |
5883 | // Note: we don't count b as used in "a = b". This is to allow |
5884 | // a = b |
5885 | // b = c |
5886 | |
5887 | if (Parser.parseToken(AsmToken::EndOfStatement)) |
5888 | return true; |
5889 | |
5890 | // Validate that the LHS is allowed to be a variable (either it has not been |
5891 | // used as a symbol, or it is an absolute symbol). |
5892 | Sym = Parser.getContext().lookupSymbol(Name); |
5893 | if (Sym) { |
5894 | // Diagnose assignment to a label. |
5895 | // |
5896 | // FIXME: Diagnostics. Note the location of the definition as a label. |
5897 | // FIXME: Diagnose assignment to protected identifier (e.g., register name). |
5898 | if (isSymbolUsedInExpression(Sym, Value)) |
5899 | return Parser.Error(EqualLoc, "Recursive use of '" + Name + "'"); |
5900 | else if (Sym->isUndefined(/*SetUsed*/ false) && !Sym->isUsed() && |
5901 | !Sym->isVariable()) |
5902 | ; // Allow redefinitions of undefined symbols only used in directives. |
5903 | else if (Sym->isVariable() && !Sym->isUsed() && allow_redef) |
5904 | ; // Allow redefinitions of variables that haven't yet been used. |
5905 | else if (!Sym->isUndefined() && (!Sym->isVariable() || !allow_redef)) |
5906 | return Parser.Error(EqualLoc, "redefinition of '" + Name + "'"); |
5907 | else if (!Sym->isVariable()) |
5908 | return Parser.Error(EqualLoc, "invalid assignment to '" + Name + "'"); |
5909 | else if (!isa<MCConstantExpr>(Sym->getVariableValue())) |
5910 | return Parser.Error(EqualLoc, |
5911 | "invalid reassignment of non-absolute variable '" + |
5912 | Name + "'"); |
5913 | } else if (Name == ".") { |
5914 | Parser.getStreamer().emitValueToOffset(Value, 0, EqualLoc); |
5915 | return false; |
5916 | } else |
5917 | Sym = Parser.getContext().getOrCreateSymbol(Name); |
5918 | |
5919 | Sym->setRedefinable(allow_redef); |
5920 | |
5921 | return false; |
5922 | } |
5923 | |
5924 | } // end namespace MCParserUtils |
5925 | } // end namespace llvm |
5926 | |
5927 | /// Create an MCAsmParser instance. |
5928 | MCAsmParser *llvm::createMCAsmParser(SourceMgr &SM, MCContext &C, |
5929 | MCStreamer &Out, const MCAsmInfo &MAI, |
5930 | unsigned CB) { |
5931 | return new AsmParser(SM, C, Out, MAI, CB); |
5932 | } |