File: | lib/MC/MCParser/AsmParser.cpp |
Warning: | line 3346, column 7 Value stored to 'FileNumber' is never read |
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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 | /// \brief Helper types for tracking macro definitions. |
84 | typedef std::vector<AsmToken> MCAsmMacroArgument; |
85 | typedef std::vector<MCAsmMacroArgument> MCAsmMacroArguments; |
86 | |
87 | /// \brief 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 | /// \brief The parsed operands from the last parsed statement. |
108 | SmallVector<std::unique_ptr<MCParsedAsmOperand>, 8> ParsedOperands; |
109 | |
110 | /// \brief The opcode from the last parsed instruction. |
111 | unsigned Opcode = ~0U; |
112 | |
113 | /// \brief 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 | /// \brief 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 | /// \brief 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 | /// \brief Stack of active macro instantiations. |
148 | std::vector<MacroInstantiation*> ActiveMacros; |
149 | |
150 | /// \brief 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 | /// \brief 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 | /// \brief List of forward directional labels for diagnosis at the end. |
169 | SmallVector<std::tuple<SMLoc, CppHashInfoTy, MCSymbol *>, 4> DirLabels; |
170 | |
171 | /// When generating dwarf for assembly source files we need to calculate the |
172 | /// logical line number based on the last parsed cpp hash file line comment |
173 | /// and current line. Since this is slow and messes up the SourceMgr's |
174 | /// cache we save the last info we queried with SrcMgr.FindLineNumber(). |
175 | SMLoc LastQueryIDLoc; |
176 | unsigned LastQueryBuffer; |
177 | unsigned LastQueryLine; |
178 | |
179 | /// AssemblerDialect. ~OU means unset value and use value provided by MAI. |
180 | unsigned AssemblerDialect = ~0U; |
181 | |
182 | /// \brief is Darwin compatibility enabled? |
183 | bool IsDarwin = false; |
184 | |
185 | /// \brief Are we parsing ms-style inline assembly? |
186 | bool ParsingInlineAsm = false; |
187 | |
188 | public: |
189 | AsmParser(SourceMgr &SM, MCContext &Ctx, MCStreamer &Out, |
190 | const MCAsmInfo &MAI, unsigned CB); |
191 | AsmParser(const AsmParser &) = delete; |
192 | AsmParser &operator=(const AsmParser &) = delete; |
193 | ~AsmParser() override; |
194 | |
195 | bool Run(bool NoInitialTextSection, bool NoFinalize = false) override; |
196 | |
197 | void addDirectiveHandler(StringRef Directive, |
198 | ExtensionDirectiveHandler Handler) override { |
199 | ExtensionDirectiveMap[Directive] = Handler; |
200 | } |
201 | |
202 | void addAliasForDirective(StringRef Directive, StringRef Alias) override { |
203 | DirectiveKindMap[Directive] = DirectiveKindMap[Alias]; |
204 | } |
205 | |
206 | /// @name MCAsmParser Interface |
207 | /// { |
208 | |
209 | SourceMgr &getSourceManager() override { return SrcMgr; } |
210 | MCAsmLexer &getLexer() override { return Lexer; } |
211 | MCContext &getContext() override { return Ctx; } |
212 | MCStreamer &getStreamer() override { return Out; } |
213 | |
214 | CodeViewContext &getCVContext() { return Ctx.getCVContext(); } |
215 | |
216 | unsigned getAssemblerDialect() override { |
217 | if (AssemblerDialect == ~0U) |
218 | return MAI.getAssemblerDialect(); |
219 | else |
220 | return AssemblerDialect; |
221 | } |
222 | void setAssemblerDialect(unsigned i) override { |
223 | AssemblerDialect = i; |
224 | } |
225 | |
226 | void Note(SMLoc L, const Twine &Msg, SMRange Range = None) override; |
227 | bool Warning(SMLoc L, const Twine &Msg, SMRange Range = None) override; |
228 | bool printError(SMLoc L, const Twine &Msg, SMRange Range = None) override; |
229 | |
230 | const AsmToken &Lex() override; |
231 | |
232 | void setParsingInlineAsm(bool V) override { |
233 | ParsingInlineAsm = V; |
234 | Lexer.setParsingMSInlineAsm(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 | /// \brief 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 | /// \brief 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 isAltmacroString(SMLoc &StrLoc, SMLoc &EndLoc); |
269 | void altMacroString(StringRef AltMacroStr, std::string &Res); |
270 | bool parseStatement(ParseStatementInfo &Info, |
271 | MCAsmParserSemaCallback *SI); |
272 | bool parseCurlyBlockScope(SmallVectorImpl<AsmRewrite>& AsmStrRewrites); |
273 | bool parseCppHashLineFilenameComment(SMLoc L); |
274 | |
275 | void checkForBadMacro(SMLoc DirectiveLoc, StringRef Name, StringRef Body, |
276 | ArrayRef<MCAsmMacroParameter> Parameters); |
277 | bool expandMacro(raw_svector_ostream &OS, StringRef Body, |
278 | ArrayRef<MCAsmMacroParameter> Parameters, |
279 | ArrayRef<MCAsmMacroArgument> A, bool EnableAtPseudoVariable, |
280 | SMLoc L); |
281 | |
282 | /// \brief Are macros enabled in the parser? |
283 | bool areMacrosEnabled() {return MacrosEnabledFlag;} |
284 | |
285 | /// \brief Control a flag in the parser that enables or disables macros. |
286 | void setMacrosEnabled(bool Flag) {MacrosEnabledFlag = Flag;} |
287 | |
288 | /// \brief Are we inside a macro instantiation? |
289 | bool isInsideMacroInstantiation() {return !ActiveMacros.empty();} |
290 | |
291 | /// \brief Handle entry to macro instantiation. |
292 | /// |
293 | /// \param M The macro. |
294 | /// \param NameLoc Instantiation location. |
295 | bool handleMacroEntry(const MCAsmMacro *M, SMLoc NameLoc); |
296 | |
297 | /// \brief Handle exit from macro instantiation. |
298 | void handleMacroExit(); |
299 | |
300 | /// \brief Extract AsmTokens for a macro argument. |
301 | bool parseMacroArgument(MCAsmMacroArgument &MA, bool Vararg); |
302 | |
303 | /// \brief Parse all macro arguments for a given macro. |
304 | bool parseMacroArguments(const MCAsmMacro *M, MCAsmMacroArguments &A); |
305 | |
306 | void printMacroInstantiations(); |
307 | void printMessage(SMLoc Loc, SourceMgr::DiagKind Kind, const Twine &Msg, |
308 | SMRange Range = None) const { |
309 | ArrayRef<SMRange> Ranges(Range); |
310 | SrcMgr.PrintMessage(Loc, Kind, Msg, Ranges); |
311 | } |
312 | static void DiagHandler(const SMDiagnostic &Diag, void *Context); |
313 | |
314 | /// \brief Enter the specified file. This returns true on failure. |
315 | bool enterIncludeFile(const std::string &Filename); |
316 | |
317 | /// \brief Process the specified file for the .incbin directive. |
318 | /// This returns true on failure. |
319 | bool processIncbinFile(const std::string &Filename, int64_t Skip = 0, |
320 | const MCExpr *Count = nullptr, SMLoc Loc = SMLoc()); |
321 | |
322 | /// \brief Reset the current lexer position to that given by \p Loc. The |
323 | /// current token is not set; clients should ensure Lex() is called |
324 | /// subsequently. |
325 | /// |
326 | /// \param InBuffer If not 0, should be the known buffer id that contains the |
327 | /// location. |
328 | void jumpToLoc(SMLoc Loc, unsigned InBuffer = 0); |
329 | |
330 | /// \brief Parse up to the end of statement and a return the contents from the |
331 | /// current token until the end of the statement; the current token on exit |
332 | /// will be either the EndOfStatement or EOF. |
333 | StringRef parseStringToEndOfStatement() override; |
334 | |
335 | /// \brief Parse until the end of a statement or a comma is encountered, |
336 | /// return the contents from the current token up to the end or comma. |
337 | StringRef parseStringToComma(); |
338 | |
339 | bool parseAssignment(StringRef Name, bool allow_redef, |
340 | bool NoDeadStrip = false); |
341 | |
342 | unsigned getBinOpPrecedence(AsmToken::TokenKind K, |
343 | MCBinaryExpr::Opcode &Kind); |
344 | |
345 | bool parseBinOpRHS(unsigned Precedence, const MCExpr *&Res, SMLoc &EndLoc); |
346 | bool parseParenExpr(const MCExpr *&Res, SMLoc &EndLoc); |
347 | bool parseBracketExpr(const MCExpr *&Res, SMLoc &EndLoc); |
348 | |
349 | bool parseRegisterOrRegisterNumber(int64_t &Register, SMLoc DirectiveLoc); |
350 | |
351 | bool parseCVFunctionId(int64_t &FunctionId, StringRef DirectiveName); |
352 | bool parseCVFileId(int64_t &FileId, StringRef DirectiveName); |
353 | |
354 | // Generic (target and platform independent) directive parsing. |
355 | enum DirectiveKind { |
356 | DK_NO_DIRECTIVE, // Placeholder |
357 | DK_SET, |
358 | DK_EQU, |
359 | DK_EQUIV, |
360 | DK_ASCII, |
361 | DK_ASCIZ, |
362 | DK_STRING, |
363 | DK_BYTE, |
364 | DK_SHORT, |
365 | DK_RELOC, |
366 | DK_VALUE, |
367 | DK_2BYTE, |
368 | DK_LONG, |
369 | DK_INT, |
370 | DK_4BYTE, |
371 | DK_QUAD, |
372 | DK_8BYTE, |
373 | DK_OCTA, |
374 | DK_DC, |
375 | DK_DC_A, |
376 | DK_DC_B, |
377 | DK_DC_D, |
378 | DK_DC_L, |
379 | DK_DC_S, |
380 | DK_DC_W, |
381 | DK_DC_X, |
382 | DK_DCB, |
383 | DK_DCB_B, |
384 | DK_DCB_D, |
385 | DK_DCB_L, |
386 | DK_DCB_S, |
387 | DK_DCB_W, |
388 | DK_DCB_X, |
389 | DK_DS, |
390 | DK_DS_B, |
391 | DK_DS_D, |
392 | DK_DS_L, |
393 | DK_DS_P, |
394 | DK_DS_S, |
395 | DK_DS_W, |
396 | DK_DS_X, |
397 | DK_SINGLE, |
398 | DK_FLOAT, |
399 | DK_DOUBLE, |
400 | DK_ALIGN, |
401 | DK_ALIGN32, |
402 | DK_BALIGN, |
403 | DK_BALIGNW, |
404 | DK_BALIGNL, |
405 | DK_P2ALIGN, |
406 | DK_P2ALIGNW, |
407 | DK_P2ALIGNL, |
408 | DK_ORG, |
409 | DK_FILL, |
410 | DK_ENDR, |
411 | DK_BUNDLE_ALIGN_MODE, |
412 | DK_BUNDLE_LOCK, |
413 | DK_BUNDLE_UNLOCK, |
414 | DK_ZERO, |
415 | DK_EXTERN, |
416 | DK_GLOBL, |
417 | DK_GLOBAL, |
418 | DK_LAZY_REFERENCE, |
419 | DK_NO_DEAD_STRIP, |
420 | DK_SYMBOL_RESOLVER, |
421 | DK_PRIVATE_EXTERN, |
422 | DK_REFERENCE, |
423 | DK_WEAK_DEFINITION, |
424 | DK_WEAK_REFERENCE, |
425 | DK_WEAK_DEF_CAN_BE_HIDDEN, |
426 | DK_COMM, |
427 | DK_COMMON, |
428 | DK_LCOMM, |
429 | DK_ABORT, |
430 | DK_INCLUDE, |
431 | DK_INCBIN, |
432 | DK_CODE16, |
433 | DK_CODE16GCC, |
434 | DK_REPT, |
435 | DK_IRP, |
436 | DK_IRPC, |
437 | DK_IF, |
438 | DK_IFEQ, |
439 | DK_IFGE, |
440 | DK_IFGT, |
441 | DK_IFLE, |
442 | DK_IFLT, |
443 | DK_IFNE, |
444 | DK_IFB, |
445 | DK_IFNB, |
446 | DK_IFC, |
447 | DK_IFEQS, |
448 | DK_IFNC, |
449 | DK_IFNES, |
450 | DK_IFDEF, |
451 | DK_IFNDEF, |
452 | DK_IFNOTDEF, |
453 | DK_ELSEIF, |
454 | DK_ELSE, |
455 | DK_ENDIF, |
456 | DK_SPACE, |
457 | DK_SKIP, |
458 | DK_FILE, |
459 | DK_LINE, |
460 | DK_LOC, |
461 | DK_STABS, |
462 | DK_CV_FILE, |
463 | DK_CV_FUNC_ID, |
464 | DK_CV_INLINE_SITE_ID, |
465 | DK_CV_LOC, |
466 | DK_CV_LINETABLE, |
467 | DK_CV_INLINE_LINETABLE, |
468 | DK_CV_DEF_RANGE, |
469 | DK_CV_STRINGTABLE, |
470 | DK_CV_FILECHECKSUMS, |
471 | DK_CV_FILECHECKSUM_OFFSET, |
472 | DK_CV_FPO_DATA, |
473 | DK_CFI_SECTIONS, |
474 | DK_CFI_STARTPROC, |
475 | DK_CFI_ENDPROC, |
476 | DK_CFI_DEF_CFA, |
477 | DK_CFI_DEF_CFA_OFFSET, |
478 | DK_CFI_ADJUST_CFA_OFFSET, |
479 | DK_CFI_DEF_CFA_REGISTER, |
480 | DK_CFI_OFFSET, |
481 | DK_CFI_REL_OFFSET, |
482 | DK_CFI_PERSONALITY, |
483 | DK_CFI_LSDA, |
484 | DK_CFI_REMEMBER_STATE, |
485 | DK_CFI_RESTORE_STATE, |
486 | DK_CFI_SAME_VALUE, |
487 | DK_CFI_RESTORE, |
488 | DK_CFI_ESCAPE, |
489 | DK_CFI_RETURN_COLUMN, |
490 | DK_CFI_SIGNAL_FRAME, |
491 | DK_CFI_UNDEFINED, |
492 | DK_CFI_REGISTER, |
493 | DK_CFI_WINDOW_SAVE, |
494 | DK_MACROS_ON, |
495 | DK_MACROS_OFF, |
496 | DK_ALTMACRO, |
497 | DK_NOALTMACRO, |
498 | DK_MACRO, |
499 | DK_EXITM, |
500 | DK_ENDM, |
501 | DK_ENDMACRO, |
502 | DK_PURGEM, |
503 | DK_SLEB128, |
504 | DK_ULEB128, |
505 | DK_ERR, |
506 | DK_ERROR, |
507 | DK_WARNING, |
508 | DK_PRINT, |
509 | DK_END |
510 | }; |
511 | |
512 | /// \brief Maps directive name --> DirectiveKind enum, for |
513 | /// directives parsed by this class. |
514 | StringMap<DirectiveKind> DirectiveKindMap; |
515 | |
516 | // ".ascii", ".asciz", ".string" |
517 | bool parseDirectiveAscii(StringRef IDVal, bool ZeroTerminated); |
518 | bool parseDirectiveReloc(SMLoc DirectiveLoc); // ".reloc" |
519 | bool parseDirectiveValue(StringRef IDVal, |
520 | unsigned Size); // ".byte", ".long", ... |
521 | bool parseDirectiveOctaValue(StringRef IDVal); // ".octa", ... |
522 | bool parseDirectiveRealValue(StringRef IDVal, |
523 | const fltSemantics &); // ".single", ... |
524 | bool parseDirectiveFill(); // ".fill" |
525 | bool parseDirectiveZero(); // ".zero" |
526 | // ".set", ".equ", ".equiv" |
527 | bool parseDirectiveSet(StringRef IDVal, bool allow_redef); |
528 | bool parseDirectiveOrg(); // ".org" |
529 | // ".align{,32}", ".p2align{,w,l}" |
530 | bool parseDirectiveAlign(bool IsPow2, unsigned ValueSize); |
531 | |
532 | // ".file", ".line", ".loc", ".stabs" |
533 | bool parseDirectiveFile(SMLoc DirectiveLoc); |
534 | bool parseDirectiveLine(); |
535 | bool parseDirectiveLoc(); |
536 | bool parseDirectiveStabs(); |
537 | |
538 | // ".cv_file", ".cv_func_id", ".cv_inline_site_id", ".cv_loc", ".cv_linetable", |
539 | // ".cv_inline_linetable", ".cv_def_range" |
540 | bool parseDirectiveCVFile(); |
541 | bool parseDirectiveCVFuncId(); |
542 | bool parseDirectiveCVInlineSiteId(); |
543 | bool parseDirectiveCVLoc(); |
544 | bool parseDirectiveCVLinetable(); |
545 | bool parseDirectiveCVInlineLinetable(); |
546 | bool parseDirectiveCVDefRange(); |
547 | bool parseDirectiveCVStringTable(); |
548 | bool parseDirectiveCVFileChecksums(); |
549 | bool parseDirectiveCVFileChecksumOffset(); |
550 | bool parseDirectiveCVFPOData(); |
551 | |
552 | // .cfi directives |
553 | bool parseDirectiveCFIRegister(SMLoc DirectiveLoc); |
554 | bool parseDirectiveCFIWindowSave(); |
555 | bool parseDirectiveCFISections(); |
556 | bool parseDirectiveCFIStartProc(); |
557 | bool parseDirectiveCFIEndProc(); |
558 | bool parseDirectiveCFIDefCfaOffset(); |
559 | bool parseDirectiveCFIDefCfa(SMLoc DirectiveLoc); |
560 | bool parseDirectiveCFIAdjustCfaOffset(); |
561 | bool parseDirectiveCFIDefCfaRegister(SMLoc DirectiveLoc); |
562 | bool parseDirectiveCFIOffset(SMLoc DirectiveLoc); |
563 | bool parseDirectiveCFIRelOffset(SMLoc DirectiveLoc); |
564 | bool parseDirectiveCFIPersonalityOrLsda(bool IsPersonality); |
565 | bool parseDirectiveCFIRememberState(); |
566 | bool parseDirectiveCFIRestoreState(); |
567 | bool parseDirectiveCFISameValue(SMLoc DirectiveLoc); |
568 | bool parseDirectiveCFIRestore(SMLoc DirectiveLoc); |
569 | bool parseDirectiveCFIEscape(); |
570 | bool parseDirectiveCFIReturnColumn(SMLoc DirectiveLoc); |
571 | bool parseDirectiveCFISignalFrame(); |
572 | bool parseDirectiveCFIUndefined(SMLoc DirectiveLoc); |
573 | |
574 | // macro directives |
575 | bool parseDirectivePurgeMacro(SMLoc DirectiveLoc); |
576 | bool parseDirectiveExitMacro(StringRef Directive); |
577 | bool parseDirectiveEndMacro(StringRef Directive); |
578 | bool parseDirectiveMacro(SMLoc DirectiveLoc); |
579 | bool parseDirectiveMacrosOnOff(StringRef Directive); |
580 | // alternate macro mode directives |
581 | bool parseDirectiveAltmacro(StringRef Directive); |
582 | // ".bundle_align_mode" |
583 | bool parseDirectiveBundleAlignMode(); |
584 | // ".bundle_lock" |
585 | bool parseDirectiveBundleLock(); |
586 | // ".bundle_unlock" |
587 | bool parseDirectiveBundleUnlock(); |
588 | |
589 | // ".space", ".skip" |
590 | bool parseDirectiveSpace(StringRef IDVal); |
591 | |
592 | // ".dcb" |
593 | bool parseDirectiveDCB(StringRef IDVal, unsigned Size); |
594 | bool parseDirectiveRealDCB(StringRef IDVal, const fltSemantics &); |
595 | // ".ds" |
596 | bool parseDirectiveDS(StringRef IDVal, unsigned Size); |
597 | |
598 | // .sleb128 (Signed=true) and .uleb128 (Signed=false) |
599 | bool parseDirectiveLEB128(bool Signed); |
600 | |
601 | /// \brief Parse a directive like ".globl" which |
602 | /// accepts a single symbol (which should be a label or an external). |
603 | bool parseDirectiveSymbolAttribute(MCSymbolAttr Attr); |
604 | |
605 | bool parseDirectiveComm(bool IsLocal); // ".comm" and ".lcomm" |
606 | |
607 | bool parseDirectiveAbort(); // ".abort" |
608 | bool parseDirectiveInclude(); // ".include" |
609 | bool parseDirectiveIncbin(); // ".incbin" |
610 | |
611 | // ".if", ".ifeq", ".ifge", ".ifgt" , ".ifle", ".iflt" or ".ifne" |
612 | bool parseDirectiveIf(SMLoc DirectiveLoc, DirectiveKind DirKind); |
613 | // ".ifb" or ".ifnb", depending on ExpectBlank. |
614 | bool parseDirectiveIfb(SMLoc DirectiveLoc, bool ExpectBlank); |
615 | // ".ifc" or ".ifnc", depending on ExpectEqual. |
616 | bool parseDirectiveIfc(SMLoc DirectiveLoc, bool ExpectEqual); |
617 | // ".ifeqs" or ".ifnes", depending on ExpectEqual. |
618 | bool parseDirectiveIfeqs(SMLoc DirectiveLoc, bool ExpectEqual); |
619 | // ".ifdef" or ".ifndef", depending on expect_defined |
620 | bool parseDirectiveIfdef(SMLoc DirectiveLoc, bool expect_defined); |
621 | bool parseDirectiveElseIf(SMLoc DirectiveLoc); // ".elseif" |
622 | bool parseDirectiveElse(SMLoc DirectiveLoc); // ".else" |
623 | bool parseDirectiveEndIf(SMLoc DirectiveLoc); // .endif |
624 | bool parseEscapedString(std::string &Data) override; |
625 | |
626 | const MCExpr *applyModifierToExpr(const MCExpr *E, |
627 | MCSymbolRefExpr::VariantKind Variant); |
628 | |
629 | // Macro-like directives |
630 | MCAsmMacro *parseMacroLikeBody(SMLoc DirectiveLoc); |
631 | void instantiateMacroLikeBody(MCAsmMacro *M, SMLoc DirectiveLoc, |
632 | raw_svector_ostream &OS); |
633 | bool parseDirectiveRept(SMLoc DirectiveLoc, StringRef Directive); |
634 | bool parseDirectiveIrp(SMLoc DirectiveLoc); // ".irp" |
635 | bool parseDirectiveIrpc(SMLoc DirectiveLoc); // ".irpc" |
636 | bool parseDirectiveEndr(SMLoc DirectiveLoc); // ".endr" |
637 | |
638 | // "_emit" or "__emit" |
639 | bool parseDirectiveMSEmit(SMLoc DirectiveLoc, ParseStatementInfo &Info, |
640 | size_t Len); |
641 | |
642 | // "align" |
643 | bool parseDirectiveMSAlign(SMLoc DirectiveLoc, ParseStatementInfo &Info); |
644 | |
645 | // "end" |
646 | bool parseDirectiveEnd(SMLoc DirectiveLoc); |
647 | |
648 | // ".err" or ".error" |
649 | bool parseDirectiveError(SMLoc DirectiveLoc, bool WithMessage); |
650 | |
651 | // ".warning" |
652 | bool parseDirectiveWarning(SMLoc DirectiveLoc); |
653 | |
654 | // .print <double-quotes-string> |
655 | bool parseDirectivePrint(SMLoc DirectiveLoc); |
656 | |
657 | void initializeDirectiveKindMap(); |
658 | }; |
659 | |
660 | } // end anonymous namespace |
661 | |
662 | namespace llvm { |
663 | |
664 | extern MCAsmParserExtension *createDarwinAsmParser(); |
665 | extern MCAsmParserExtension *createELFAsmParser(); |
666 | extern MCAsmParserExtension *createCOFFAsmParser(); |
667 | |
668 | } // end namespace llvm |
669 | |
670 | enum { DEFAULT_ADDRSPACE = 0 }; |
671 | |
672 | AsmParser::AsmParser(SourceMgr &SM, MCContext &Ctx, MCStreamer &Out, |
673 | const MCAsmInfo &MAI, unsigned CB = 0) |
674 | : Lexer(MAI), Ctx(Ctx), Out(Out), MAI(MAI), SrcMgr(SM), |
675 | CurBuffer(CB ? CB : SM.getMainFileID()), MacrosEnabledFlag(true) { |
676 | HadError = false; |
677 | // Save the old handler. |
678 | SavedDiagHandler = SrcMgr.getDiagHandler(); |
679 | SavedDiagContext = SrcMgr.getDiagContext(); |
680 | // Set our own handler which calls the saved handler. |
681 | SrcMgr.setDiagHandler(DiagHandler, this); |
682 | Lexer.setBuffer(SrcMgr.getMemoryBuffer(CurBuffer)->getBuffer()); |
683 | |
684 | // Initialize the platform / file format parser. |
685 | switch (Ctx.getObjectFileInfo()->getObjectFileType()) { |
686 | case MCObjectFileInfo::IsCOFF: |
687 | PlatformParser.reset(createCOFFAsmParser()); |
688 | break; |
689 | case MCObjectFileInfo::IsMachO: |
690 | PlatformParser.reset(createDarwinAsmParser()); |
691 | IsDarwin = true; |
692 | break; |
693 | case MCObjectFileInfo::IsELF: |
694 | PlatformParser.reset(createELFAsmParser()); |
695 | break; |
696 | case MCObjectFileInfo::IsWasm: |
697 | llvm_unreachable("Wasm parsing not supported yet")::llvm::llvm_unreachable_internal("Wasm parsing not supported yet" , "/build/llvm-toolchain-snapshot-7~svn326551/lib/MC/MCParser/AsmParser.cpp" , 697); |
698 | break; |
699 | } |
700 | |
701 | PlatformParser->Initialize(*this); |
702 | initializeDirectiveKindMap(); |
703 | |
704 | NumOfMacroInstantiations = 0; |
705 | } |
706 | |
707 | AsmParser::~AsmParser() { |
708 | assert((HadError || ActiveMacros.empty()) &&(static_cast <bool> ((HadError || ActiveMacros.empty()) && "Unexpected active macro instantiation!") ? void ( 0) : __assert_fail ("(HadError || ActiveMacros.empty()) && \"Unexpected active macro instantiation!\"" , "/build/llvm-toolchain-snapshot-7~svn326551/lib/MC/MCParser/AsmParser.cpp" , 709, __extension__ __PRETTY_FUNCTION__)) |
709 | "Unexpected active macro instantiation!")(static_cast <bool> ((HadError || ActiveMacros.empty()) && "Unexpected active macro instantiation!") ? void ( 0) : __assert_fail ("(HadError || ActiveMacros.empty()) && \"Unexpected active macro instantiation!\"" , "/build/llvm-toolchain-snapshot-7~svn326551/lib/MC/MCParser/AsmParser.cpp" , 709, __extension__ __PRETTY_FUNCTION__)); |
710 | |
711 | // Restore the saved diagnostics handler and context for use during |
712 | // finalization. |
713 | SrcMgr.setDiagHandler(SavedDiagHandler, SavedDiagContext); |
714 | } |
715 | |
716 | void AsmParser::printMacroInstantiations() { |
717 | // Print the active macro instantiation stack. |
718 | for (std::vector<MacroInstantiation *>::const_reverse_iterator |
719 | it = ActiveMacros.rbegin(), |
720 | ie = ActiveMacros.rend(); |
721 | it != ie; ++it) |
722 | printMessage((*it)->InstantiationLoc, SourceMgr::DK_Note, |
723 | "while in macro instantiation"); |
724 | } |
725 | |
726 | void AsmParser::Note(SMLoc L, const Twine &Msg, SMRange Range) { |
727 | printPendingErrors(); |
728 | printMessage(L, SourceMgr::DK_Note, Msg, Range); |
729 | printMacroInstantiations(); |
730 | } |
731 | |
732 | bool AsmParser::Warning(SMLoc L, const Twine &Msg, SMRange Range) { |
733 | if(getTargetParser().getTargetOptions().MCNoWarn) |
734 | return false; |
735 | if (getTargetParser().getTargetOptions().MCFatalWarnings) |
736 | return Error(L, Msg, Range); |
737 | printMessage(L, SourceMgr::DK_Warning, Msg, Range); |
738 | printMacroInstantiations(); |
739 | return false; |
740 | } |
741 | |
742 | bool AsmParser::printError(SMLoc L, const Twine &Msg, SMRange Range) { |
743 | HadError = true; |
744 | printMessage(L, SourceMgr::DK_Error, Msg, Range); |
745 | printMacroInstantiations(); |
746 | return true; |
747 | } |
748 | |
749 | bool AsmParser::enterIncludeFile(const std::string &Filename) { |
750 | std::string IncludedFile; |
751 | unsigned NewBuf = |
752 | SrcMgr.AddIncludeFile(Filename, Lexer.getLoc(), IncludedFile); |
753 | if (!NewBuf) |
754 | return true; |
755 | |
756 | CurBuffer = NewBuf; |
757 | Lexer.setBuffer(SrcMgr.getMemoryBuffer(CurBuffer)->getBuffer()); |
758 | return false; |
759 | } |
760 | |
761 | /// Process the specified .incbin file by searching for it in the include paths |
762 | /// then just emitting the byte contents of the file to the streamer. This |
763 | /// returns true on failure. |
764 | bool AsmParser::processIncbinFile(const std::string &Filename, int64_t Skip, |
765 | const MCExpr *Count, SMLoc Loc) { |
766 | std::string IncludedFile; |
767 | unsigned NewBuf = |
768 | SrcMgr.AddIncludeFile(Filename, Lexer.getLoc(), IncludedFile); |
769 | if (!NewBuf) |
770 | return true; |
771 | |
772 | // Pick up the bytes from the file and emit them. |
773 | StringRef Bytes = SrcMgr.getMemoryBuffer(NewBuf)->getBuffer(); |
774 | Bytes = Bytes.drop_front(Skip); |
775 | if (Count) { |
776 | int64_t Res; |
777 | if (!Count->evaluateAsAbsolute(Res)) |
778 | return Error(Loc, "expected absolute expression"); |
779 | if (Res < 0) |
780 | return Warning(Loc, "negative count has no effect"); |
781 | Bytes = Bytes.take_front(Res); |
782 | } |
783 | getStreamer().EmitBytes(Bytes); |
784 | return false; |
785 | } |
786 | |
787 | void AsmParser::jumpToLoc(SMLoc Loc, unsigned InBuffer) { |
788 | CurBuffer = InBuffer ? InBuffer : SrcMgr.FindBufferContainingLoc(Loc); |
789 | Lexer.setBuffer(SrcMgr.getMemoryBuffer(CurBuffer)->getBuffer(), |
790 | Loc.getPointer()); |
791 | } |
792 | |
793 | const AsmToken &AsmParser::Lex() { |
794 | if (Lexer.getTok().is(AsmToken::Error)) |
795 | Error(Lexer.getErrLoc(), Lexer.getErr()); |
796 | |
797 | // if it's a end of statement with a comment in it |
798 | if (getTok().is(AsmToken::EndOfStatement)) { |
799 | // if this is a line comment output it. |
800 | if (!getTok().getString().empty() && getTok().getString().front() != '\n' && |
801 | getTok().getString().front() != '\r' && MAI.preserveAsmComments()) |
802 | Out.addExplicitComment(Twine(getTok().getString())); |
803 | } |
804 | |
805 | const AsmToken *tok = &Lexer.Lex(); |
806 | |
807 | // Parse comments here to be deferred until end of next statement. |
808 | while (tok->is(AsmToken::Comment)) { |
809 | if (MAI.preserveAsmComments()) |
810 | Out.addExplicitComment(Twine(tok->getString())); |
811 | tok = &Lexer.Lex(); |
812 | } |
813 | |
814 | if (tok->is(AsmToken::Eof)) { |
815 | // If this is the end of an included file, pop the parent file off the |
816 | // include stack. |
817 | SMLoc ParentIncludeLoc = SrcMgr.getParentIncludeLoc(CurBuffer); |
818 | if (ParentIncludeLoc != SMLoc()) { |
819 | jumpToLoc(ParentIncludeLoc); |
820 | return Lex(); |
821 | } |
822 | } |
823 | |
824 | return *tok; |
825 | } |
826 | |
827 | bool AsmParser::Run(bool NoInitialTextSection, bool NoFinalize) { |
828 | // Create the initial section, if requested. |
829 | if (!NoInitialTextSection) |
830 | Out.InitSections(false); |
831 | |
832 | // Prime the lexer. |
833 | Lex(); |
834 | |
835 | HadError = false; |
836 | AsmCond StartingCondState = TheCondState; |
837 | SmallVector<AsmRewrite, 4> AsmStrRewrites; |
838 | |
839 | // If we are generating dwarf for assembly source files save the initial text |
840 | // section and generate a .file directive. |
841 | if (getContext().getGenDwarfForAssembly()) { |
842 | MCSection *Sec = getStreamer().getCurrentSectionOnly(); |
843 | if (!Sec->getBeginSymbol()) { |
844 | MCSymbol *SectionStartSym = getContext().createTempSymbol(); |
845 | getStreamer().EmitLabel(SectionStartSym); |
846 | Sec->setBeginSymbol(SectionStartSym); |
847 | } |
848 | bool InsertResult = getContext().addGenDwarfSection(Sec); |
849 | assert(InsertResult && ".text section should not have debug info yet")(static_cast <bool> (InsertResult && ".text section should not have debug info yet" ) ? void (0) : __assert_fail ("InsertResult && \".text section should not have debug info yet\"" , "/build/llvm-toolchain-snapshot-7~svn326551/lib/MC/MCParser/AsmParser.cpp" , 849, __extension__ __PRETTY_FUNCTION__)); |
850 | (void)InsertResult; |
851 | getContext().setGenDwarfFileNumber(getStreamer().EmitDwarfFileDirective( |
852 | 0, StringRef(), getContext().getMainFileName())); |
853 | } |
854 | |
855 | // While we have input, parse each statement. |
856 | while (Lexer.isNot(AsmToken::Eof)) { |
857 | ParseStatementInfo Info(&AsmStrRewrites); |
858 | if (!parseStatement(Info, nullptr)) |
859 | continue; |
860 | |
861 | // If we have a Lexer Error we are on an Error Token. Load in Lexer Error |
862 | // for printing ErrMsg via Lex() only if no (presumably better) parser error |
863 | // exists. |
864 | if (!hasPendingError() && Lexer.getTok().is(AsmToken::Error)) { |
865 | Lex(); |
866 | } |
867 | |
868 | // parseStatement returned true so may need to emit an error. |
869 | printPendingErrors(); |
870 | |
871 | // Skipping to the next line if needed. |
872 | if (!getLexer().isAtStartOfStatement()) |
873 | eatToEndOfStatement(); |
874 | } |
875 | |
876 | // All errors should have been emitted. |
877 | assert(!hasPendingError() && "unexpected error from parseStatement")(static_cast <bool> (!hasPendingError() && "unexpected error from parseStatement" ) ? void (0) : __assert_fail ("!hasPendingError() && \"unexpected error from parseStatement\"" , "/build/llvm-toolchain-snapshot-7~svn326551/lib/MC/MCParser/AsmParser.cpp" , 877, __extension__ __PRETTY_FUNCTION__)); |
878 | |
879 | getTargetParser().flushPendingInstructions(getStreamer()); |
880 | |
881 | if (TheCondState.TheCond != StartingCondState.TheCond || |
882 | TheCondState.Ignore != StartingCondState.Ignore) |
883 | printError(getTok().getLoc(), "unmatched .ifs or .elses"); |
884 | // Check to see there are no empty DwarfFile slots. |
885 | const auto &LineTables = getContext().getMCDwarfLineTables(); |
886 | if (!LineTables.empty()) { |
887 | unsigned Index = 0; |
888 | for (const auto &File : LineTables.begin()->second.getMCDwarfFiles()) { |
889 | if (File.Name.empty() && Index != 0) |
890 | printError(getTok().getLoc(), "unassigned file number: " + |
891 | Twine(Index) + |
892 | " for .file directives"); |
893 | ++Index; |
894 | } |
895 | } |
896 | |
897 | // Check to see that all assembler local symbols were actually defined. |
898 | // Targets that don't do subsections via symbols may not want this, though, |
899 | // so conservatively exclude them. Only do this if we're finalizing, though, |
900 | // as otherwise we won't necessarilly have seen everything yet. |
901 | if (!NoFinalize) { |
902 | if (MAI.hasSubsectionsViaSymbols()) { |
903 | for (const auto &TableEntry : getContext().getSymbols()) { |
904 | MCSymbol *Sym = TableEntry.getValue(); |
905 | // Variable symbols may not be marked as defined, so check those |
906 | // explicitly. If we know it's a variable, we have a definition for |
907 | // the purposes of this check. |
908 | if (Sym->isTemporary() && !Sym->isVariable() && !Sym->isDefined()) |
909 | // FIXME: We would really like to refer back to where the symbol was |
910 | // first referenced for a source location. We need to add something |
911 | // to track that. Currently, we just point to the end of the file. |
912 | printError(getTok().getLoc(), "assembler local symbol '" + |
913 | Sym->getName() + "' not defined"); |
914 | } |
915 | } |
916 | |
917 | // Temporary symbols like the ones for directional jumps don't go in the |
918 | // symbol table. They also need to be diagnosed in all (final) cases. |
919 | for (std::tuple<SMLoc, CppHashInfoTy, MCSymbol *> &LocSym : DirLabels) { |
920 | if (std::get<2>(LocSym)->isUndefined()) { |
921 | // Reset the state of any "# line file" directives we've seen to the |
922 | // context as it was at the diagnostic site. |
923 | CppHashInfo = std::get<1>(LocSym); |
924 | printError(std::get<0>(LocSym), "directional label undefined"); |
925 | } |
926 | } |
927 | } |
928 | |
929 | // Finalize the output stream if there are no errors and if the client wants |
930 | // us to. |
931 | if (!HadError && !NoFinalize) |
932 | Out.Finish(); |
933 | |
934 | return HadError || getContext().hadError(); |
935 | } |
936 | |
937 | bool AsmParser::checkForValidSection() { |
938 | if (!ParsingInlineAsm && !getStreamer().getCurrentSectionOnly()) { |
939 | Out.InitSections(false); |
940 | return Error(getTok().getLoc(), |
941 | "expected section directive before assembly directive"); |
942 | } |
943 | return false; |
944 | } |
945 | |
946 | /// \brief Throw away the rest of the line for testing purposes. |
947 | void AsmParser::eatToEndOfStatement() { |
948 | while (Lexer.isNot(AsmToken::EndOfStatement) && Lexer.isNot(AsmToken::Eof)) |
949 | Lexer.Lex(); |
950 | |
951 | // Eat EOL. |
952 | if (Lexer.is(AsmToken::EndOfStatement)) |
953 | Lexer.Lex(); |
954 | } |
955 | |
956 | StringRef AsmParser::parseStringToEndOfStatement() { |
957 | const char *Start = getTok().getLoc().getPointer(); |
958 | |
959 | while (Lexer.isNot(AsmToken::EndOfStatement) && Lexer.isNot(AsmToken::Eof)) |
960 | Lexer.Lex(); |
961 | |
962 | const char *End = getTok().getLoc().getPointer(); |
963 | return StringRef(Start, End - Start); |
964 | } |
965 | |
966 | StringRef AsmParser::parseStringToComma() { |
967 | const char *Start = getTok().getLoc().getPointer(); |
968 | |
969 | while (Lexer.isNot(AsmToken::EndOfStatement) && |
970 | Lexer.isNot(AsmToken::Comma) && Lexer.isNot(AsmToken::Eof)) |
971 | Lexer.Lex(); |
972 | |
973 | const char *End = getTok().getLoc().getPointer(); |
974 | return StringRef(Start, End - Start); |
975 | } |
976 | |
977 | /// \brief Parse a paren expression and return it. |
978 | /// NOTE: This assumes the leading '(' has already been consumed. |
979 | /// |
980 | /// parenexpr ::= expr) |
981 | /// |
982 | bool AsmParser::parseParenExpr(const MCExpr *&Res, SMLoc &EndLoc) { |
983 | if (parseExpression(Res)) |
984 | return true; |
985 | if (Lexer.isNot(AsmToken::RParen)) |
986 | return TokError("expected ')' in parentheses expression"); |
987 | EndLoc = Lexer.getTok().getEndLoc(); |
988 | Lex(); |
989 | return false; |
990 | } |
991 | |
992 | /// \brief Parse a bracket expression and return it. |
993 | /// NOTE: This assumes the leading '[' has already been consumed. |
994 | /// |
995 | /// bracketexpr ::= expr] |
996 | /// |
997 | bool AsmParser::parseBracketExpr(const MCExpr *&Res, SMLoc &EndLoc) { |
998 | if (parseExpression(Res)) |
999 | return true; |
1000 | EndLoc = getTok().getEndLoc(); |
1001 | if (parseToken(AsmToken::RBrac, "expected ']' in brackets expression")) |
1002 | return true; |
1003 | return false; |
1004 | } |
1005 | |
1006 | /// \brief Parse a primary expression and return it. |
1007 | /// primaryexpr ::= (parenexpr |
1008 | /// primaryexpr ::= symbol |
1009 | /// primaryexpr ::= number |
1010 | /// primaryexpr ::= '.' |
1011 | /// primaryexpr ::= ~,+,- primaryexpr |
1012 | bool AsmParser::parsePrimaryExpr(const MCExpr *&Res, SMLoc &EndLoc) { |
1013 | SMLoc FirstTokenLoc = getLexer().getLoc(); |
1014 | AsmToken::TokenKind FirstTokenKind = Lexer.getKind(); |
1015 | switch (FirstTokenKind) { |
1016 | default: |
1017 | return TokError("unknown token in expression"); |
1018 | // If we have an error assume that we've already handled it. |
1019 | case AsmToken::Error: |
1020 | return true; |
1021 | case AsmToken::Exclaim: |
1022 | Lex(); // Eat the operator. |
1023 | if (parsePrimaryExpr(Res, EndLoc)) |
1024 | return true; |
1025 | Res = MCUnaryExpr::createLNot(Res, getContext(), FirstTokenLoc); |
1026 | return false; |
1027 | case AsmToken::Dollar: |
1028 | case AsmToken::At: |
1029 | case AsmToken::String: |
1030 | case AsmToken::Identifier: { |
1031 | StringRef Identifier; |
1032 | if (parseIdentifier(Identifier)) { |
1033 | // We may have failed but $ may be a valid token. |
1034 | if (getTok().is(AsmToken::Dollar)) { |
1035 | if (Lexer.getMAI().getDollarIsPC()) { |
1036 | Lex(); |
1037 | // This is a '$' reference, which references the current PC. Emit a |
1038 | // temporary label to the streamer and refer to it. |
1039 | MCSymbol *Sym = Ctx.createTempSymbol(); |
1040 | Out.EmitLabel(Sym); |
1041 | Res = MCSymbolRefExpr::create(Sym, MCSymbolRefExpr::VK_None, |
1042 | getContext()); |
1043 | EndLoc = FirstTokenLoc; |
1044 | return false; |
1045 | } |
1046 | return Error(FirstTokenLoc, "invalid token in expression"); |
1047 | } |
1048 | } |
1049 | // Parse symbol variant |
1050 | std::pair<StringRef, StringRef> Split; |
1051 | if (!MAI.useParensForSymbolVariant()) { |
1052 | if (FirstTokenKind == AsmToken::String) { |
1053 | if (Lexer.is(AsmToken::At)) { |
1054 | Lex(); // eat @ |
1055 | SMLoc AtLoc = getLexer().getLoc(); |
1056 | StringRef VName; |
1057 | if (parseIdentifier(VName)) |
1058 | return Error(AtLoc, "expected symbol variant after '@'"); |
1059 | |
1060 | Split = std::make_pair(Identifier, VName); |
1061 | } |
1062 | } else { |
1063 | Split = Identifier.split('@'); |
1064 | } |
1065 | } else if (Lexer.is(AsmToken::LParen)) { |
1066 | Lex(); // eat '('. |
1067 | StringRef VName; |
1068 | parseIdentifier(VName); |
1069 | // eat ')'. |
1070 | if (parseToken(AsmToken::RParen, |
1071 | "unexpected token in variant, expected ')'")) |
1072 | return true; |
1073 | Split = std::make_pair(Identifier, VName); |
1074 | } |
1075 | |
1076 | EndLoc = SMLoc::getFromPointer(Identifier.end()); |
1077 | |
1078 | // This is a symbol reference. |
1079 | StringRef SymbolName = Identifier; |
1080 | if (SymbolName.empty()) |
1081 | return true; |
1082 | |
1083 | MCSymbolRefExpr::VariantKind Variant = MCSymbolRefExpr::VK_None; |
1084 | |
1085 | // Lookup the symbol variant if used. |
1086 | if (!Split.second.empty()) { |
1087 | Variant = MCSymbolRefExpr::getVariantKindForName(Split.second); |
1088 | if (Variant != MCSymbolRefExpr::VK_Invalid) { |
1089 | SymbolName = Split.first; |
1090 | } else if (MAI.doesAllowAtInName() && !MAI.useParensForSymbolVariant()) { |
1091 | Variant = MCSymbolRefExpr::VK_None; |
1092 | } else { |
1093 | return Error(SMLoc::getFromPointer(Split.second.begin()), |
1094 | "invalid variant '" + Split.second + "'"); |
1095 | } |
1096 | } |
1097 | |
1098 | MCSymbol *Sym = getContext().getOrCreateSymbol(SymbolName); |
1099 | |
1100 | // If this is an absolute variable reference, substitute it now to preserve |
1101 | // semantics in the face of reassignment. |
1102 | if (Sym->isVariable() && |
1103 | isa<MCConstantExpr>(Sym->getVariableValue(/*SetUsed*/ false))) { |
1104 | if (Variant) |
1105 | return Error(EndLoc, "unexpected modifier on variable reference"); |
1106 | |
1107 | Res = Sym->getVariableValue(/*SetUsed*/ false); |
1108 | return false; |
1109 | } |
1110 | |
1111 | // Otherwise create a symbol ref. |
1112 | Res = MCSymbolRefExpr::create(Sym, Variant, getContext(), FirstTokenLoc); |
1113 | return false; |
1114 | } |
1115 | case AsmToken::BigNum: |
1116 | return TokError("literal value out of range for directive"); |
1117 | case AsmToken::Integer: { |
1118 | SMLoc Loc = getTok().getLoc(); |
1119 | int64_t IntVal = getTok().getIntVal(); |
1120 | Res = MCConstantExpr::create(IntVal, getContext()); |
1121 | EndLoc = Lexer.getTok().getEndLoc(); |
1122 | Lex(); // Eat token. |
1123 | // Look for 'b' or 'f' following an Integer as a directional label |
1124 | if (Lexer.getKind() == AsmToken::Identifier) { |
1125 | StringRef IDVal = getTok().getString(); |
1126 | // Lookup the symbol variant if used. |
1127 | std::pair<StringRef, StringRef> Split = IDVal.split('@'); |
1128 | MCSymbolRefExpr::VariantKind Variant = MCSymbolRefExpr::VK_None; |
1129 | if (Split.first.size() != IDVal.size()) { |
1130 | Variant = MCSymbolRefExpr::getVariantKindForName(Split.second); |
1131 | if (Variant == MCSymbolRefExpr::VK_Invalid) |
1132 | return TokError("invalid variant '" + Split.second + "'"); |
1133 | IDVal = Split.first; |
1134 | } |
1135 | if (IDVal == "f" || IDVal == "b") { |
1136 | MCSymbol *Sym = |
1137 | Ctx.getDirectionalLocalSymbol(IntVal, IDVal == "b"); |
1138 | Res = MCSymbolRefExpr::create(Sym, Variant, getContext()); |
1139 | if (IDVal == "b" && Sym->isUndefined()) |
1140 | return Error(Loc, "directional label undefined"); |
1141 | DirLabels.push_back(std::make_tuple(Loc, CppHashInfo, Sym)); |
1142 | EndLoc = Lexer.getTok().getEndLoc(); |
1143 | Lex(); // Eat identifier. |
1144 | } |
1145 | } |
1146 | return false; |
1147 | } |
1148 | case AsmToken::Real: { |
1149 | APFloat RealVal(APFloat::IEEEdouble(), getTok().getString()); |
1150 | uint64_t IntVal = RealVal.bitcastToAPInt().getZExtValue(); |
1151 | Res = MCConstantExpr::create(IntVal, getContext()); |
1152 | EndLoc = Lexer.getTok().getEndLoc(); |
1153 | Lex(); // Eat token. |
1154 | return false; |
1155 | } |
1156 | case AsmToken::Dot: { |
1157 | // This is a '.' reference, which references the current PC. Emit a |
1158 | // temporary label to the streamer and refer to it. |
1159 | MCSymbol *Sym = Ctx.createTempSymbol(); |
1160 | Out.EmitLabel(Sym); |
1161 | Res = MCSymbolRefExpr::create(Sym, MCSymbolRefExpr::VK_None, getContext()); |
1162 | EndLoc = Lexer.getTok().getEndLoc(); |
1163 | Lex(); // Eat identifier. |
1164 | return false; |
1165 | } |
1166 | case AsmToken::LParen: |
1167 | Lex(); // Eat the '('. |
1168 | return parseParenExpr(Res, EndLoc); |
1169 | case AsmToken::LBrac: |
1170 | if (!PlatformParser->HasBracketExpressions()) |
1171 | return TokError("brackets expression not supported on this target"); |
1172 | Lex(); // Eat the '['. |
1173 | return parseBracketExpr(Res, EndLoc); |
1174 | case AsmToken::Minus: |
1175 | Lex(); // Eat the operator. |
1176 | if (parsePrimaryExpr(Res, EndLoc)) |
1177 | return true; |
1178 | Res = MCUnaryExpr::createMinus(Res, getContext(), FirstTokenLoc); |
1179 | return false; |
1180 | case AsmToken::Plus: |
1181 | Lex(); // Eat the operator. |
1182 | if (parsePrimaryExpr(Res, EndLoc)) |
1183 | return true; |
1184 | Res = MCUnaryExpr::createPlus(Res, getContext(), FirstTokenLoc); |
1185 | return false; |
1186 | case AsmToken::Tilde: |
1187 | Lex(); // Eat the operator. |
1188 | if (parsePrimaryExpr(Res, EndLoc)) |
1189 | return true; |
1190 | Res = MCUnaryExpr::createNot(Res, getContext(), FirstTokenLoc); |
1191 | return false; |
1192 | // MIPS unary expression operators. The lexer won't generate these tokens if |
1193 | // MCAsmInfo::HasMipsExpressions is false for the target. |
1194 | case AsmToken::PercentCall16: |
1195 | case AsmToken::PercentCall_Hi: |
1196 | case AsmToken::PercentCall_Lo: |
1197 | case AsmToken::PercentDtprel_Hi: |
1198 | case AsmToken::PercentDtprel_Lo: |
1199 | case AsmToken::PercentGot: |
1200 | case AsmToken::PercentGot_Disp: |
1201 | case AsmToken::PercentGot_Hi: |
1202 | case AsmToken::PercentGot_Lo: |
1203 | case AsmToken::PercentGot_Ofst: |
1204 | case AsmToken::PercentGot_Page: |
1205 | case AsmToken::PercentGottprel: |
1206 | case AsmToken::PercentGp_Rel: |
1207 | case AsmToken::PercentHi: |
1208 | case AsmToken::PercentHigher: |
1209 | case AsmToken::PercentHighest: |
1210 | case AsmToken::PercentLo: |
1211 | case AsmToken::PercentNeg: |
1212 | case AsmToken::PercentPcrel_Hi: |
1213 | case AsmToken::PercentPcrel_Lo: |
1214 | case AsmToken::PercentTlsgd: |
1215 | case AsmToken::PercentTlsldm: |
1216 | case AsmToken::PercentTprel_Hi: |
1217 | case AsmToken::PercentTprel_Lo: |
1218 | Lex(); // Eat the operator. |
1219 | if (Lexer.isNot(AsmToken::LParen)) |
1220 | return TokError("expected '(' after operator"); |
1221 | Lex(); // Eat the operator. |
1222 | if (parseExpression(Res, EndLoc)) |
1223 | return true; |
1224 | if (Lexer.isNot(AsmToken::RParen)) |
1225 | return TokError("expected ')'"); |
1226 | Lex(); // Eat the operator. |
1227 | Res = getTargetParser().createTargetUnaryExpr(Res, FirstTokenKind, Ctx); |
1228 | return !Res; |
1229 | } |
1230 | } |
1231 | |
1232 | bool AsmParser::parseExpression(const MCExpr *&Res) { |
1233 | SMLoc EndLoc; |
1234 | return parseExpression(Res, EndLoc); |
1235 | } |
1236 | |
1237 | const MCExpr * |
1238 | AsmParser::applyModifierToExpr(const MCExpr *E, |
1239 | MCSymbolRefExpr::VariantKind Variant) { |
1240 | // Ask the target implementation about this expression first. |
1241 | const MCExpr *NewE = getTargetParser().applyModifierToExpr(E, Variant, Ctx); |
1242 | if (NewE) |
1243 | return NewE; |
1244 | // Recurse over the given expression, rebuilding it to apply the given variant |
1245 | // if there is exactly one symbol. |
1246 | switch (E->getKind()) { |
1247 | case MCExpr::Target: |
1248 | case MCExpr::Constant: |
1249 | return nullptr; |
1250 | |
1251 | case MCExpr::SymbolRef: { |
1252 | const MCSymbolRefExpr *SRE = cast<MCSymbolRefExpr>(E); |
1253 | |
1254 | if (SRE->getKind() != MCSymbolRefExpr::VK_None) { |
1255 | TokError("invalid variant on expression '" + getTok().getIdentifier() + |
1256 | "' (already modified)"); |
1257 | return E; |
1258 | } |
1259 | |
1260 | return MCSymbolRefExpr::create(&SRE->getSymbol(), Variant, getContext()); |
1261 | } |
1262 | |
1263 | case MCExpr::Unary: { |
1264 | const MCUnaryExpr *UE = cast<MCUnaryExpr>(E); |
1265 | const MCExpr *Sub = applyModifierToExpr(UE->getSubExpr(), Variant); |
1266 | if (!Sub) |
1267 | return nullptr; |
1268 | return MCUnaryExpr::create(UE->getOpcode(), Sub, getContext()); |
1269 | } |
1270 | |
1271 | case MCExpr::Binary: { |
1272 | const MCBinaryExpr *BE = cast<MCBinaryExpr>(E); |
1273 | const MCExpr *LHS = applyModifierToExpr(BE->getLHS(), Variant); |
1274 | const MCExpr *RHS = applyModifierToExpr(BE->getRHS(), Variant); |
1275 | |
1276 | if (!LHS && !RHS) |
1277 | return nullptr; |
1278 | |
1279 | if (!LHS) |
1280 | LHS = BE->getLHS(); |
1281 | if (!RHS) |
1282 | RHS = BE->getRHS(); |
1283 | |
1284 | return MCBinaryExpr::create(BE->getOpcode(), LHS, RHS, getContext()); |
1285 | } |
1286 | } |
1287 | |
1288 | llvm_unreachable("Invalid expression kind!")::llvm::llvm_unreachable_internal("Invalid expression kind!", "/build/llvm-toolchain-snapshot-7~svn326551/lib/MC/MCParser/AsmParser.cpp" , 1288); |
1289 | } |
1290 | |
1291 | /// This function checks if the next token is <string> type or arithmetic. |
1292 | /// string that begin with character '<' must end with character '>'. |
1293 | /// otherwise it is arithmetics. |
1294 | /// If the function returns a 'true' value, |
1295 | /// the End argument will be filled with the last location pointed to the '>' |
1296 | /// character. |
1297 | |
1298 | /// There is a gap between the AltMacro's documentation and the single quote implementation. |
1299 | /// GCC does not fully support this feature and so we will not support it. |
1300 | /// TODO: Adding single quote as a string. |
1301 | bool AsmParser::isAltmacroString(SMLoc &StrLoc, SMLoc &EndLoc) { |
1302 | assert((StrLoc.getPointer() != NULL) &&(static_cast <bool> ((StrLoc.getPointer() != __null) && "Argument to the function cannot be a NULL value") ? void (0 ) : __assert_fail ("(StrLoc.getPointer() != NULL) && \"Argument to the function cannot be a NULL value\"" , "/build/llvm-toolchain-snapshot-7~svn326551/lib/MC/MCParser/AsmParser.cpp" , 1303, __extension__ __PRETTY_FUNCTION__)) |
1303 | "Argument to the function cannot be a NULL value")(static_cast <bool> ((StrLoc.getPointer() != __null) && "Argument to the function cannot be a NULL value") ? void (0 ) : __assert_fail ("(StrLoc.getPointer() != NULL) && \"Argument to the function cannot be a NULL value\"" , "/build/llvm-toolchain-snapshot-7~svn326551/lib/MC/MCParser/AsmParser.cpp" , 1303, __extension__ __PRETTY_FUNCTION__)); |
1304 | const char *CharPtr = StrLoc.getPointer(); |
1305 | while ((*CharPtr != '>') && (*CharPtr != '\n') && (*CharPtr != '\r') && |
1306 | (*CharPtr != '\0')) { |
1307 | if (*CharPtr == '!') |
1308 | CharPtr++; |
1309 | CharPtr++; |
1310 | } |
1311 | if (*CharPtr == '>') { |
1312 | EndLoc = StrLoc.getFromPointer(CharPtr + 1); |
1313 | return true; |
1314 | } |
1315 | return false; |
1316 | } |
1317 | |
1318 | /// \brief creating a string without the escape characters '!'. |
1319 | void AsmParser::altMacroString(StringRef AltMacroStr,std::string &Res) { |
1320 | for (size_t Pos = 0; Pos < AltMacroStr.size(); Pos++) { |
1321 | if (AltMacroStr[Pos] == '!') |
1322 | Pos++; |
1323 | Res += AltMacroStr[Pos]; |
1324 | } |
1325 | } |
1326 | |
1327 | /// \brief Parse an expression and return it. |
1328 | /// |
1329 | /// expr ::= expr &&,|| expr -> lowest. |
1330 | /// expr ::= expr |,^,&,! expr |
1331 | /// expr ::= expr ==,!=,<>,<,<=,>,>= expr |
1332 | /// expr ::= expr <<,>> expr |
1333 | /// expr ::= expr +,- expr |
1334 | /// expr ::= expr *,/,% expr -> highest. |
1335 | /// expr ::= primaryexpr |
1336 | /// |
1337 | bool AsmParser::parseExpression(const MCExpr *&Res, SMLoc &EndLoc) { |
1338 | // Parse the expression. |
1339 | Res = nullptr; |
1340 | if (parsePrimaryExpr(Res, EndLoc) || parseBinOpRHS(1, Res, EndLoc)) |
1341 | return true; |
1342 | |
1343 | // As a special case, we support 'a op b @ modifier' by rewriting the |
1344 | // expression to include the modifier. This is inefficient, but in general we |
1345 | // expect users to use 'a@modifier op b'. |
1346 | if (Lexer.getKind() == AsmToken::At) { |
1347 | Lex(); |
1348 | |
1349 | if (Lexer.isNot(AsmToken::Identifier)) |
1350 | return TokError("unexpected symbol modifier following '@'"); |
1351 | |
1352 | MCSymbolRefExpr::VariantKind Variant = |
1353 | MCSymbolRefExpr::getVariantKindForName(getTok().getIdentifier()); |
1354 | if (Variant == MCSymbolRefExpr::VK_Invalid) |
1355 | return TokError("invalid variant '" + getTok().getIdentifier() + "'"); |
1356 | |
1357 | const MCExpr *ModifiedRes = applyModifierToExpr(Res, Variant); |
1358 | if (!ModifiedRes) { |
1359 | return TokError("invalid modifier '" + getTok().getIdentifier() + |
1360 | "' (no symbols present)"); |
1361 | } |
1362 | |
1363 | Res = ModifiedRes; |
1364 | Lex(); |
1365 | } |
1366 | |
1367 | // Try to constant fold it up front, if possible. |
1368 | int64_t Value; |
1369 | if (Res->evaluateAsAbsolute(Value)) |
1370 | Res = MCConstantExpr::create(Value, getContext()); |
1371 | |
1372 | return false; |
1373 | } |
1374 | |
1375 | bool AsmParser::parseParenExpression(const MCExpr *&Res, SMLoc &EndLoc) { |
1376 | Res = nullptr; |
1377 | return parseParenExpr(Res, EndLoc) || parseBinOpRHS(1, Res, EndLoc); |
1378 | } |
1379 | |
1380 | bool AsmParser::parseParenExprOfDepth(unsigned ParenDepth, const MCExpr *&Res, |
1381 | SMLoc &EndLoc) { |
1382 | if (parseParenExpr(Res, EndLoc)) |
1383 | return true; |
1384 | |
1385 | for (; ParenDepth > 0; --ParenDepth) { |
1386 | if (parseBinOpRHS(1, Res, EndLoc)) |
1387 | return true; |
1388 | |
1389 | // We don't Lex() the last RParen. |
1390 | // This is the same behavior as parseParenExpression(). |
1391 | if (ParenDepth - 1 > 0) { |
1392 | EndLoc = getTok().getEndLoc(); |
1393 | if (parseToken(AsmToken::RParen, |
1394 | "expected ')' in parentheses expression")) |
1395 | return true; |
1396 | } |
1397 | } |
1398 | return false; |
1399 | } |
1400 | |
1401 | bool AsmParser::parseAbsoluteExpression(int64_t &Res) { |
1402 | const MCExpr *Expr; |
1403 | |
1404 | SMLoc StartLoc = Lexer.getLoc(); |
1405 | if (parseExpression(Expr)) |
1406 | return true; |
1407 | |
1408 | if (!Expr->evaluateAsAbsolute(Res)) |
1409 | return Error(StartLoc, "expected absolute expression"); |
1410 | |
1411 | return false; |
1412 | } |
1413 | |
1414 | static unsigned getDarwinBinOpPrecedence(AsmToken::TokenKind K, |
1415 | MCBinaryExpr::Opcode &Kind, |
1416 | bool ShouldUseLogicalShr) { |
1417 | switch (K) { |
1418 | default: |
1419 | return 0; // not a binop. |
1420 | |
1421 | // Lowest Precedence: &&, || |
1422 | case AsmToken::AmpAmp: |
1423 | Kind = MCBinaryExpr::LAnd; |
1424 | return 1; |
1425 | case AsmToken::PipePipe: |
1426 | Kind = MCBinaryExpr::LOr; |
1427 | return 1; |
1428 | |
1429 | // Low Precedence: |, &, ^ |
1430 | // |
1431 | // FIXME: gas seems to support '!' as an infix operator? |
1432 | case AsmToken::Pipe: |
1433 | Kind = MCBinaryExpr::Or; |
1434 | return 2; |
1435 | case AsmToken::Caret: |
1436 | Kind = MCBinaryExpr::Xor; |
1437 | return 2; |
1438 | case AsmToken::Amp: |
1439 | Kind = MCBinaryExpr::And; |
1440 | return 2; |
1441 | |
1442 | // Low Intermediate Precedence: ==, !=, <>, <, <=, >, >= |
1443 | case AsmToken::EqualEqual: |
1444 | Kind = MCBinaryExpr::EQ; |
1445 | return 3; |
1446 | case AsmToken::ExclaimEqual: |
1447 | case AsmToken::LessGreater: |
1448 | Kind = MCBinaryExpr::NE; |
1449 | return 3; |
1450 | case AsmToken::Less: |
1451 | Kind = MCBinaryExpr::LT; |
1452 | return 3; |
1453 | case AsmToken::LessEqual: |
1454 | Kind = MCBinaryExpr::LTE; |
1455 | return 3; |
1456 | case AsmToken::Greater: |
1457 | Kind = MCBinaryExpr::GT; |
1458 | return 3; |
1459 | case AsmToken::GreaterEqual: |
1460 | Kind = MCBinaryExpr::GTE; |
1461 | return 3; |
1462 | |
1463 | // Intermediate Precedence: <<, >> |
1464 | case AsmToken::LessLess: |
1465 | Kind = MCBinaryExpr::Shl; |
1466 | return 4; |
1467 | case AsmToken::GreaterGreater: |
1468 | Kind = ShouldUseLogicalShr ? MCBinaryExpr::LShr : MCBinaryExpr::AShr; |
1469 | return 4; |
1470 | |
1471 | // High Intermediate Precedence: +, - |
1472 | case AsmToken::Plus: |
1473 | Kind = MCBinaryExpr::Add; |
1474 | return 5; |
1475 | case AsmToken::Minus: |
1476 | Kind = MCBinaryExpr::Sub; |
1477 | return 5; |
1478 | |
1479 | // Highest Precedence: *, /, % |
1480 | case AsmToken::Star: |
1481 | Kind = MCBinaryExpr::Mul; |
1482 | return 6; |
1483 | case AsmToken::Slash: |
1484 | Kind = MCBinaryExpr::Div; |
1485 | return 6; |
1486 | case AsmToken::Percent: |
1487 | Kind = MCBinaryExpr::Mod; |
1488 | return 6; |
1489 | } |
1490 | } |
1491 | |
1492 | static unsigned getGNUBinOpPrecedence(AsmToken::TokenKind K, |
1493 | MCBinaryExpr::Opcode &Kind, |
1494 | bool ShouldUseLogicalShr) { |
1495 | switch (K) { |
1496 | default: |
1497 | return 0; // not a binop. |
1498 | |
1499 | // Lowest Precedence: &&, || |
1500 | case AsmToken::AmpAmp: |
1501 | Kind = MCBinaryExpr::LAnd; |
1502 | return 2; |
1503 | case AsmToken::PipePipe: |
1504 | Kind = MCBinaryExpr::LOr; |
1505 | return 1; |
1506 | |
1507 | // Low Precedence: ==, !=, <>, <, <=, >, >= |
1508 | case AsmToken::EqualEqual: |
1509 | Kind = MCBinaryExpr::EQ; |
1510 | return 3; |
1511 | case AsmToken::ExclaimEqual: |
1512 | case AsmToken::LessGreater: |
1513 | Kind = MCBinaryExpr::NE; |
1514 | return 3; |
1515 | case AsmToken::Less: |
1516 | Kind = MCBinaryExpr::LT; |
1517 | return 3; |
1518 | case AsmToken::LessEqual: |
1519 | Kind = MCBinaryExpr::LTE; |
1520 | return 3; |
1521 | case AsmToken::Greater: |
1522 | Kind = MCBinaryExpr::GT; |
1523 | return 3; |
1524 | case AsmToken::GreaterEqual: |
1525 | Kind = MCBinaryExpr::GTE; |
1526 | return 3; |
1527 | |
1528 | // Low Intermediate Precedence: +, - |
1529 | case AsmToken::Plus: |
1530 | Kind = MCBinaryExpr::Add; |
1531 | return 4; |
1532 | case AsmToken::Minus: |
1533 | Kind = MCBinaryExpr::Sub; |
1534 | return 4; |
1535 | |
1536 | // High Intermediate Precedence: |, &, ^ |
1537 | // |
1538 | // FIXME: gas seems to support '!' as an infix operator? |
1539 | case AsmToken::Pipe: |
1540 | Kind = MCBinaryExpr::Or; |
1541 | return 5; |
1542 | case AsmToken::Caret: |
1543 | Kind = MCBinaryExpr::Xor; |
1544 | return 5; |
1545 | case AsmToken::Amp: |
1546 | Kind = MCBinaryExpr::And; |
1547 | return 5; |
1548 | |
1549 | // Highest Precedence: *, /, %, <<, >> |
1550 | case AsmToken::Star: |
1551 | Kind = MCBinaryExpr::Mul; |
1552 | return 6; |
1553 | case AsmToken::Slash: |
1554 | Kind = MCBinaryExpr::Div; |
1555 | return 6; |
1556 | case AsmToken::Percent: |
1557 | Kind = MCBinaryExpr::Mod; |
1558 | return 6; |
1559 | case AsmToken::LessLess: |
1560 | Kind = MCBinaryExpr::Shl; |
1561 | return 6; |
1562 | case AsmToken::GreaterGreater: |
1563 | Kind = ShouldUseLogicalShr ? MCBinaryExpr::LShr : MCBinaryExpr::AShr; |
1564 | return 6; |
1565 | } |
1566 | } |
1567 | |
1568 | unsigned AsmParser::getBinOpPrecedence(AsmToken::TokenKind K, |
1569 | MCBinaryExpr::Opcode &Kind) { |
1570 | bool ShouldUseLogicalShr = MAI.shouldUseLogicalShr(); |
1571 | return IsDarwin ? getDarwinBinOpPrecedence(K, Kind, ShouldUseLogicalShr) |
1572 | : getGNUBinOpPrecedence(K, Kind, ShouldUseLogicalShr); |
1573 | } |
1574 | |
1575 | /// \brief Parse all binary operators with precedence >= 'Precedence'. |
1576 | /// Res contains the LHS of the expression on input. |
1577 | bool AsmParser::parseBinOpRHS(unsigned Precedence, const MCExpr *&Res, |
1578 | SMLoc &EndLoc) { |
1579 | SMLoc StartLoc = Lexer.getLoc(); |
1580 | while (true) { |
1581 | MCBinaryExpr::Opcode Kind = MCBinaryExpr::Add; |
1582 | unsigned TokPrec = getBinOpPrecedence(Lexer.getKind(), Kind); |
1583 | |
1584 | // If the next token is lower precedence than we are allowed to eat, return |
1585 | // successfully with what we ate already. |
1586 | if (TokPrec < Precedence) |
1587 | return false; |
1588 | |
1589 | Lex(); |
1590 | |
1591 | // Eat the next primary expression. |
1592 | const MCExpr *RHS; |
1593 | if (parsePrimaryExpr(RHS, EndLoc)) |
1594 | return true; |
1595 | |
1596 | // If BinOp binds less tightly with RHS than the operator after RHS, let |
1597 | // the pending operator take RHS as its LHS. |
1598 | MCBinaryExpr::Opcode Dummy; |
1599 | unsigned NextTokPrec = getBinOpPrecedence(Lexer.getKind(), Dummy); |
1600 | if (TokPrec < NextTokPrec && parseBinOpRHS(TokPrec + 1, RHS, EndLoc)) |
1601 | return true; |
1602 | |
1603 | // Merge LHS and RHS according to operator. |
1604 | Res = MCBinaryExpr::create(Kind, Res, RHS, getContext(), StartLoc); |
1605 | } |
1606 | } |
1607 | |
1608 | /// ParseStatement: |
1609 | /// ::= EndOfStatement |
1610 | /// ::= Label* Directive ...Operands... EndOfStatement |
1611 | /// ::= Label* Identifier OperandList* EndOfStatement |
1612 | bool AsmParser::parseStatement(ParseStatementInfo &Info, |
1613 | MCAsmParserSemaCallback *SI) { |
1614 | assert(!hasPendingError() && "parseStatement started with pending error")(static_cast <bool> (!hasPendingError() && "parseStatement started with pending error" ) ? void (0) : __assert_fail ("!hasPendingError() && \"parseStatement started with pending error\"" , "/build/llvm-toolchain-snapshot-7~svn326551/lib/MC/MCParser/AsmParser.cpp" , 1614, __extension__ __PRETTY_FUNCTION__)); |
1615 | // Eat initial spaces and comments |
1616 | while (Lexer.is(AsmToken::Space)) |
1617 | Lex(); |
1618 | if (Lexer.is(AsmToken::EndOfStatement)) { |
1619 | // if this is a line comment we can drop it safely |
1620 | if (getTok().getString().empty() || getTok().getString().front() == '\r' || |
1621 | getTok().getString().front() == '\n') |
1622 | Out.AddBlankLine(); |
1623 | Lex(); |
1624 | return false; |
1625 | } |
1626 | // Statements always start with an identifier. |
1627 | AsmToken ID = getTok(); |
1628 | SMLoc IDLoc = ID.getLoc(); |
1629 | StringRef IDVal; |
1630 | int64_t LocalLabelVal = -1; |
1631 | if (Lexer.is(AsmToken::HashDirective)) |
1632 | return parseCppHashLineFilenameComment(IDLoc); |
1633 | // Allow an integer followed by a ':' as a directional local label. |
1634 | if (Lexer.is(AsmToken::Integer)) { |
1635 | LocalLabelVal = getTok().getIntVal(); |
1636 | if (LocalLabelVal < 0) { |
1637 | if (!TheCondState.Ignore) { |
1638 | Lex(); // always eat a token |
1639 | return Error(IDLoc, "unexpected token at start of statement"); |
1640 | } |
1641 | IDVal = ""; |
1642 | } else { |
1643 | IDVal = getTok().getString(); |
1644 | Lex(); // Consume the integer token to be used as an identifier token. |
1645 | if (Lexer.getKind() != AsmToken::Colon) { |
1646 | if (!TheCondState.Ignore) { |
1647 | Lex(); // always eat a token |
1648 | return Error(IDLoc, "unexpected token at start of statement"); |
1649 | } |
1650 | } |
1651 | } |
1652 | } else if (Lexer.is(AsmToken::Dot)) { |
1653 | // Treat '.' as a valid identifier in this context. |
1654 | Lex(); |
1655 | IDVal = "."; |
1656 | } else if (Lexer.is(AsmToken::LCurly)) { |
1657 | // Treat '{' as a valid identifier in this context. |
1658 | Lex(); |
1659 | IDVal = "{"; |
1660 | |
1661 | } else if (Lexer.is(AsmToken::RCurly)) { |
1662 | // Treat '}' as a valid identifier in this context. |
1663 | Lex(); |
1664 | IDVal = "}"; |
1665 | } else if (Lexer.is(AsmToken::Star) && |
1666 | getTargetParser().starIsStartOfStatement()) { |
1667 | // Accept '*' as a valid start of statement. |
1668 | Lex(); |
1669 | IDVal = "*"; |
1670 | } else if (parseIdentifier(IDVal)) { |
1671 | if (!TheCondState.Ignore) { |
1672 | Lex(); // always eat a token |
1673 | return Error(IDLoc, "unexpected token at start of statement"); |
1674 | } |
1675 | IDVal = ""; |
1676 | } |
1677 | |
1678 | // Handle conditional assembly here before checking for skipping. We |
1679 | // have to do this so that .endif isn't skipped in a ".if 0" block for |
1680 | // example. |
1681 | StringMap<DirectiveKind>::const_iterator DirKindIt = |
1682 | DirectiveKindMap.find(IDVal); |
1683 | DirectiveKind DirKind = (DirKindIt == DirectiveKindMap.end()) |
1684 | ? DK_NO_DIRECTIVE |
1685 | : DirKindIt->getValue(); |
1686 | switch (DirKind) { |
1687 | default: |
1688 | break; |
1689 | case DK_IF: |
1690 | case DK_IFEQ: |
1691 | case DK_IFGE: |
1692 | case DK_IFGT: |
1693 | case DK_IFLE: |
1694 | case DK_IFLT: |
1695 | case DK_IFNE: |
1696 | return parseDirectiveIf(IDLoc, DirKind); |
1697 | case DK_IFB: |
1698 | return parseDirectiveIfb(IDLoc, true); |
1699 | case DK_IFNB: |
1700 | return parseDirectiveIfb(IDLoc, false); |
1701 | case DK_IFC: |
1702 | return parseDirectiveIfc(IDLoc, true); |
1703 | case DK_IFEQS: |
1704 | return parseDirectiveIfeqs(IDLoc, true); |
1705 | case DK_IFNC: |
1706 | return parseDirectiveIfc(IDLoc, false); |
1707 | case DK_IFNES: |
1708 | return parseDirectiveIfeqs(IDLoc, false); |
1709 | case DK_IFDEF: |
1710 | return parseDirectiveIfdef(IDLoc, true); |
1711 | case DK_IFNDEF: |
1712 | case DK_IFNOTDEF: |
1713 | return parseDirectiveIfdef(IDLoc, false); |
1714 | case DK_ELSEIF: |
1715 | return parseDirectiveElseIf(IDLoc); |
1716 | case DK_ELSE: |
1717 | return parseDirectiveElse(IDLoc); |
1718 | case DK_ENDIF: |
1719 | return parseDirectiveEndIf(IDLoc); |
1720 | } |
1721 | |
1722 | // Ignore the statement if in the middle of inactive conditional |
1723 | // (e.g. ".if 0"). |
1724 | if (TheCondState.Ignore) { |
1725 | eatToEndOfStatement(); |
1726 | return false; |
1727 | } |
1728 | |
1729 | // FIXME: Recurse on local labels? |
1730 | |
1731 | // See what kind of statement we have. |
1732 | switch (Lexer.getKind()) { |
1733 | case AsmToken::Colon: { |
1734 | if (!getTargetParser().isLabel(ID)) |
1735 | break; |
1736 | if (checkForValidSection()) |
1737 | return true; |
1738 | |
1739 | // identifier ':' -> Label. |
1740 | Lex(); |
1741 | |
1742 | // Diagnose attempt to use '.' as a label. |
1743 | if (IDVal == ".") |
1744 | return Error(IDLoc, "invalid use of pseudo-symbol '.' as a label"); |
1745 | |
1746 | // Diagnose attempt to use a variable as a label. |
1747 | // |
1748 | // FIXME: Diagnostics. Note the location of the definition as a label. |
1749 | // FIXME: This doesn't diagnose assignment to a symbol which has been |
1750 | // implicitly marked as external. |
1751 | MCSymbol *Sym; |
1752 | if (LocalLabelVal == -1) { |
1753 | if (ParsingInlineAsm && SI) { |
1754 | StringRef RewrittenLabel = |
1755 | SI->LookupInlineAsmLabel(IDVal, getSourceManager(), IDLoc, true); |
1756 | assert(!RewrittenLabel.empty() &&(static_cast <bool> (!RewrittenLabel.empty() && "We should have an internal name here.") ? void (0) : __assert_fail ("!RewrittenLabel.empty() && \"We should have an internal name here.\"" , "/build/llvm-toolchain-snapshot-7~svn326551/lib/MC/MCParser/AsmParser.cpp" , 1757, __extension__ __PRETTY_FUNCTION__)) |
1757 | "We should have an internal name here.")(static_cast <bool> (!RewrittenLabel.empty() && "We should have an internal name here.") ? void (0) : __assert_fail ("!RewrittenLabel.empty() && \"We should have an internal name here.\"" , "/build/llvm-toolchain-snapshot-7~svn326551/lib/MC/MCParser/AsmParser.cpp" , 1757, __extension__ __PRETTY_FUNCTION__)); |
1758 | Info.AsmRewrites->emplace_back(AOK_Label, IDLoc, IDVal.size(), |
1759 | RewrittenLabel); |
1760 | IDVal = RewrittenLabel; |
1761 | } |
1762 | Sym = getContext().getOrCreateSymbol(IDVal); |
1763 | } else |
1764 | Sym = Ctx.createDirectionalLocalSymbol(LocalLabelVal); |
1765 | // End of Labels should be treated as end of line for lexing |
1766 | // purposes but that information is not available to the Lexer who |
1767 | // does not understand Labels. This may cause us to see a Hash |
1768 | // here instead of a preprocessor line comment. |
1769 | if (getTok().is(AsmToken::Hash)) { |
1770 | StringRef CommentStr = parseStringToEndOfStatement(); |
1771 | Lexer.Lex(); |
1772 | Lexer.UnLex(AsmToken(AsmToken::EndOfStatement, CommentStr)); |
1773 | } |
1774 | |
1775 | // Consume any end of statement token, if present, to avoid spurious |
1776 | // AddBlankLine calls(). |
1777 | if (getTok().is(AsmToken::EndOfStatement)) { |
1778 | Lex(); |
1779 | } |
1780 | |
1781 | // Emit the label. |
1782 | if (!getTargetParser().isParsingInlineAsm()) |
1783 | Out.EmitLabel(Sym, IDLoc); |
1784 | |
1785 | // If we are generating dwarf for assembly source files then gather the |
1786 | // info to make a dwarf label entry for this label if needed. |
1787 | if (getContext().getGenDwarfForAssembly()) |
1788 | MCGenDwarfLabelEntry::Make(Sym, &getStreamer(), getSourceManager(), |
1789 | IDLoc); |
1790 | |
1791 | getTargetParser().onLabelParsed(Sym); |
1792 | |
1793 | return false; |
1794 | } |
1795 | |
1796 | case AsmToken::Equal: |
1797 | if (!getTargetParser().equalIsAsmAssignment()) |
1798 | break; |
1799 | // identifier '=' ... -> assignment statement |
1800 | Lex(); |
1801 | |
1802 | return parseAssignment(IDVal, true); |
1803 | |
1804 | default: // Normal instruction or directive. |
1805 | break; |
1806 | } |
1807 | |
1808 | // If macros are enabled, check to see if this is a macro instantiation. |
1809 | if (areMacrosEnabled()) |
1810 | if (const MCAsmMacro *M = getContext().lookupMacro(IDVal)) { |
1811 | return handleMacroEntry(M, IDLoc); |
1812 | } |
1813 | |
1814 | // Otherwise, we have a normal instruction or directive. |
1815 | |
1816 | // Directives start with "." |
1817 | if (IDVal[0] == '.' && IDVal != ".") { |
1818 | // There are several entities interested in parsing directives: |
1819 | // |
1820 | // 1. The target-specific assembly parser. Some directives are target |
1821 | // specific or may potentially behave differently on certain targets. |
1822 | // 2. Asm parser extensions. For example, platform-specific parsers |
1823 | // (like the ELF parser) register themselves as extensions. |
1824 | // 3. The generic directive parser implemented by this class. These are |
1825 | // all the directives that behave in a target and platform independent |
1826 | // manner, or at least have a default behavior that's shared between |
1827 | // all targets and platforms. |
1828 | |
1829 | getTargetParser().flushPendingInstructions(getStreamer()); |
1830 | |
1831 | SMLoc StartTokLoc = getTok().getLoc(); |
1832 | bool TPDirectiveReturn = getTargetParser().ParseDirective(ID); |
1833 | |
1834 | if (hasPendingError()) |
1835 | return true; |
1836 | // Currently the return value should be true if we are |
1837 | // uninterested but as this is at odds with the standard parsing |
1838 | // convention (return true = error) we have instances of a parsed |
1839 | // directive that fails returning true as an error. Catch these |
1840 | // cases as best as possible errors here. |
1841 | if (TPDirectiveReturn && StartTokLoc != getTok().getLoc()) |
1842 | return true; |
1843 | // Return if we did some parsing or believe we succeeded. |
1844 | if (!TPDirectiveReturn || StartTokLoc != getTok().getLoc()) |
1845 | return false; |
1846 | |
1847 | // Next, check the extension directive map to see if any extension has |
1848 | // registered itself to parse this directive. |
1849 | std::pair<MCAsmParserExtension *, DirectiveHandler> Handler = |
1850 | ExtensionDirectiveMap.lookup(IDVal); |
1851 | if (Handler.first) |
1852 | return (*Handler.second)(Handler.first, IDVal, IDLoc); |
1853 | |
1854 | // Finally, if no one else is interested in this directive, it must be |
1855 | // generic and familiar to this class. |
1856 | switch (DirKind) { |
1857 | default: |
1858 | break; |
1859 | case DK_SET: |
1860 | case DK_EQU: |
1861 | return parseDirectiveSet(IDVal, true); |
1862 | case DK_EQUIV: |
1863 | return parseDirectiveSet(IDVal, false); |
1864 | case DK_ASCII: |
1865 | return parseDirectiveAscii(IDVal, false); |
1866 | case DK_ASCIZ: |
1867 | case DK_STRING: |
1868 | return parseDirectiveAscii(IDVal, true); |
1869 | case DK_BYTE: |
1870 | case DK_DC_B: |
1871 | return parseDirectiveValue(IDVal, 1); |
1872 | case DK_DC: |
1873 | case DK_DC_W: |
1874 | case DK_SHORT: |
1875 | case DK_VALUE: |
1876 | case DK_2BYTE: |
1877 | return parseDirectiveValue(IDVal, 2); |
1878 | case DK_LONG: |
1879 | case DK_INT: |
1880 | case DK_4BYTE: |
1881 | case DK_DC_L: |
1882 | return parseDirectiveValue(IDVal, 4); |
1883 | case DK_QUAD: |
1884 | case DK_8BYTE: |
1885 | return parseDirectiveValue(IDVal, 8); |
1886 | case DK_DC_A: |
1887 | return parseDirectiveValue( |
1888 | IDVal, getContext().getAsmInfo()->getCodePointerSize()); |
1889 | case DK_OCTA: |
1890 | return parseDirectiveOctaValue(IDVal); |
1891 | case DK_SINGLE: |
1892 | case DK_FLOAT: |
1893 | case DK_DC_S: |
1894 | return parseDirectiveRealValue(IDVal, APFloat::IEEEsingle()); |
1895 | case DK_DOUBLE: |
1896 | case DK_DC_D: |
1897 | return parseDirectiveRealValue(IDVal, APFloat::IEEEdouble()); |
1898 | case DK_ALIGN: { |
1899 | bool IsPow2 = !getContext().getAsmInfo()->getAlignmentIsInBytes(); |
1900 | return parseDirectiveAlign(IsPow2, /*ExprSize=*/1); |
1901 | } |
1902 | case DK_ALIGN32: { |
1903 | bool IsPow2 = !getContext().getAsmInfo()->getAlignmentIsInBytes(); |
1904 | return parseDirectiveAlign(IsPow2, /*ExprSize=*/4); |
1905 | } |
1906 | case DK_BALIGN: |
1907 | return parseDirectiveAlign(/*IsPow2=*/false, /*ExprSize=*/1); |
1908 | case DK_BALIGNW: |
1909 | return parseDirectiveAlign(/*IsPow2=*/false, /*ExprSize=*/2); |
1910 | case DK_BALIGNL: |
1911 | return parseDirectiveAlign(/*IsPow2=*/false, /*ExprSize=*/4); |
1912 | case DK_P2ALIGN: |
1913 | return parseDirectiveAlign(/*IsPow2=*/true, /*ExprSize=*/1); |
1914 | case DK_P2ALIGNW: |
1915 | return parseDirectiveAlign(/*IsPow2=*/true, /*ExprSize=*/2); |
1916 | case DK_P2ALIGNL: |
1917 | return parseDirectiveAlign(/*IsPow2=*/true, /*ExprSize=*/4); |
1918 | case DK_ORG: |
1919 | return parseDirectiveOrg(); |
1920 | case DK_FILL: |
1921 | return parseDirectiveFill(); |
1922 | case DK_ZERO: |
1923 | return parseDirectiveZero(); |
1924 | case DK_EXTERN: |
1925 | eatToEndOfStatement(); // .extern is the default, ignore it. |
1926 | return false; |
1927 | case DK_GLOBL: |
1928 | case DK_GLOBAL: |
1929 | return parseDirectiveSymbolAttribute(MCSA_Global); |
1930 | case DK_LAZY_REFERENCE: |
1931 | return parseDirectiveSymbolAttribute(MCSA_LazyReference); |
1932 | case DK_NO_DEAD_STRIP: |
1933 | return parseDirectiveSymbolAttribute(MCSA_NoDeadStrip); |
1934 | case DK_SYMBOL_RESOLVER: |
1935 | return parseDirectiveSymbolAttribute(MCSA_SymbolResolver); |
1936 | case DK_PRIVATE_EXTERN: |
1937 | return parseDirectiveSymbolAttribute(MCSA_PrivateExtern); |
1938 | case DK_REFERENCE: |
1939 | return parseDirectiveSymbolAttribute(MCSA_Reference); |
1940 | case DK_WEAK_DEFINITION: |
1941 | return parseDirectiveSymbolAttribute(MCSA_WeakDefinition); |
1942 | case DK_WEAK_REFERENCE: |
1943 | return parseDirectiveSymbolAttribute(MCSA_WeakReference); |
1944 | case DK_WEAK_DEF_CAN_BE_HIDDEN: |
1945 | return parseDirectiveSymbolAttribute(MCSA_WeakDefAutoPrivate); |
1946 | case DK_COMM: |
1947 | case DK_COMMON: |
1948 | return parseDirectiveComm(/*IsLocal=*/false); |
1949 | case DK_LCOMM: |
1950 | return parseDirectiveComm(/*IsLocal=*/true); |
1951 | case DK_ABORT: |
1952 | return parseDirectiveAbort(); |
1953 | case DK_INCLUDE: |
1954 | return parseDirectiveInclude(); |
1955 | case DK_INCBIN: |
1956 | return parseDirectiveIncbin(); |
1957 | case DK_CODE16: |
1958 | case DK_CODE16GCC: |
1959 | return TokError(Twine(IDVal) + |
1960 | " not currently supported for this target"); |
1961 | case DK_REPT: |
1962 | return parseDirectiveRept(IDLoc, IDVal); |
1963 | case DK_IRP: |
1964 | return parseDirectiveIrp(IDLoc); |
1965 | case DK_IRPC: |
1966 | return parseDirectiveIrpc(IDLoc); |
1967 | case DK_ENDR: |
1968 | return parseDirectiveEndr(IDLoc); |
1969 | case DK_BUNDLE_ALIGN_MODE: |
1970 | return parseDirectiveBundleAlignMode(); |
1971 | case DK_BUNDLE_LOCK: |
1972 | return parseDirectiveBundleLock(); |
1973 | case DK_BUNDLE_UNLOCK: |
1974 | return parseDirectiveBundleUnlock(); |
1975 | case DK_SLEB128: |
1976 | return parseDirectiveLEB128(true); |
1977 | case DK_ULEB128: |
1978 | return parseDirectiveLEB128(false); |
1979 | case DK_SPACE: |
1980 | case DK_SKIP: |
1981 | return parseDirectiveSpace(IDVal); |
1982 | case DK_FILE: |
1983 | return parseDirectiveFile(IDLoc); |
1984 | case DK_LINE: |
1985 | return parseDirectiveLine(); |
1986 | case DK_LOC: |
1987 | return parseDirectiveLoc(); |
1988 | case DK_STABS: |
1989 | return parseDirectiveStabs(); |
1990 | case DK_CV_FILE: |
1991 | return parseDirectiveCVFile(); |
1992 | case DK_CV_FUNC_ID: |
1993 | return parseDirectiveCVFuncId(); |
1994 | case DK_CV_INLINE_SITE_ID: |
1995 | return parseDirectiveCVInlineSiteId(); |
1996 | case DK_CV_LOC: |
1997 | return parseDirectiveCVLoc(); |
1998 | case DK_CV_LINETABLE: |
1999 | return parseDirectiveCVLinetable(); |
2000 | case DK_CV_INLINE_LINETABLE: |
2001 | return parseDirectiveCVInlineLinetable(); |
2002 | case DK_CV_DEF_RANGE: |
2003 | return parseDirectiveCVDefRange(); |
2004 | case DK_CV_STRINGTABLE: |
2005 | return parseDirectiveCVStringTable(); |
2006 | case DK_CV_FILECHECKSUMS: |
2007 | return parseDirectiveCVFileChecksums(); |
2008 | case DK_CV_FILECHECKSUM_OFFSET: |
2009 | return parseDirectiveCVFileChecksumOffset(); |
2010 | case DK_CV_FPO_DATA: |
2011 | return parseDirectiveCVFPOData(); |
2012 | case DK_CFI_SECTIONS: |
2013 | return parseDirectiveCFISections(); |
2014 | case DK_CFI_STARTPROC: |
2015 | return parseDirectiveCFIStartProc(); |
2016 | case DK_CFI_ENDPROC: |
2017 | return parseDirectiveCFIEndProc(); |
2018 | case DK_CFI_DEF_CFA: |
2019 | return parseDirectiveCFIDefCfa(IDLoc); |
2020 | case DK_CFI_DEF_CFA_OFFSET: |
2021 | return parseDirectiveCFIDefCfaOffset(); |
2022 | case DK_CFI_ADJUST_CFA_OFFSET: |
2023 | return parseDirectiveCFIAdjustCfaOffset(); |
2024 | case DK_CFI_DEF_CFA_REGISTER: |
2025 | return parseDirectiveCFIDefCfaRegister(IDLoc); |
2026 | case DK_CFI_OFFSET: |
2027 | return parseDirectiveCFIOffset(IDLoc); |
2028 | case DK_CFI_REL_OFFSET: |
2029 | return parseDirectiveCFIRelOffset(IDLoc); |
2030 | case DK_CFI_PERSONALITY: |
2031 | return parseDirectiveCFIPersonalityOrLsda(true); |
2032 | case DK_CFI_LSDA: |
2033 | return parseDirectiveCFIPersonalityOrLsda(false); |
2034 | case DK_CFI_REMEMBER_STATE: |
2035 | return parseDirectiveCFIRememberState(); |
2036 | case DK_CFI_RESTORE_STATE: |
2037 | return parseDirectiveCFIRestoreState(); |
2038 | case DK_CFI_SAME_VALUE: |
2039 | return parseDirectiveCFISameValue(IDLoc); |
2040 | case DK_CFI_RESTORE: |
2041 | return parseDirectiveCFIRestore(IDLoc); |
2042 | case DK_CFI_ESCAPE: |
2043 | return parseDirectiveCFIEscape(); |
2044 | case DK_CFI_RETURN_COLUMN: |
2045 | return parseDirectiveCFIReturnColumn(IDLoc); |
2046 | case DK_CFI_SIGNAL_FRAME: |
2047 | return parseDirectiveCFISignalFrame(); |
2048 | case DK_CFI_UNDEFINED: |
2049 | return parseDirectiveCFIUndefined(IDLoc); |
2050 | case DK_CFI_REGISTER: |
2051 | return parseDirectiveCFIRegister(IDLoc); |
2052 | case DK_CFI_WINDOW_SAVE: |
2053 | return parseDirectiveCFIWindowSave(); |
2054 | case DK_MACROS_ON: |
2055 | case DK_MACROS_OFF: |
2056 | return parseDirectiveMacrosOnOff(IDVal); |
2057 | case DK_MACRO: |
2058 | return parseDirectiveMacro(IDLoc); |
2059 | case DK_ALTMACRO: |
2060 | case DK_NOALTMACRO: |
2061 | return parseDirectiveAltmacro(IDVal); |
2062 | case DK_EXITM: |
2063 | return parseDirectiveExitMacro(IDVal); |
2064 | case DK_ENDM: |
2065 | case DK_ENDMACRO: |
2066 | return parseDirectiveEndMacro(IDVal); |
2067 | case DK_PURGEM: |
2068 | return parseDirectivePurgeMacro(IDLoc); |
2069 | case DK_END: |
2070 | return parseDirectiveEnd(IDLoc); |
2071 | case DK_ERR: |
2072 | return parseDirectiveError(IDLoc, false); |
2073 | case DK_ERROR: |
2074 | return parseDirectiveError(IDLoc, true); |
2075 | case DK_WARNING: |
2076 | return parseDirectiveWarning(IDLoc); |
2077 | case DK_RELOC: |
2078 | return parseDirectiveReloc(IDLoc); |
2079 | case DK_DCB: |
2080 | case DK_DCB_W: |
2081 | return parseDirectiveDCB(IDVal, 2); |
2082 | case DK_DCB_B: |
2083 | return parseDirectiveDCB(IDVal, 1); |
2084 | case DK_DCB_D: |
2085 | return parseDirectiveRealDCB(IDVal, APFloat::IEEEdouble()); |
2086 | case DK_DCB_L: |
2087 | return parseDirectiveDCB(IDVal, 4); |
2088 | case DK_DCB_S: |
2089 | return parseDirectiveRealDCB(IDVal, APFloat::IEEEsingle()); |
2090 | case DK_DC_X: |
2091 | case DK_DCB_X: |
2092 | return TokError(Twine(IDVal) + |
2093 | " not currently supported for this target"); |
2094 | case DK_DS: |
2095 | case DK_DS_W: |
2096 | return parseDirectiveDS(IDVal, 2); |
2097 | case DK_DS_B: |
2098 | return parseDirectiveDS(IDVal, 1); |
2099 | case DK_DS_D: |
2100 | return parseDirectiveDS(IDVal, 8); |
2101 | case DK_DS_L: |
2102 | case DK_DS_S: |
2103 | return parseDirectiveDS(IDVal, 4); |
2104 | case DK_DS_P: |
2105 | case DK_DS_X: |
2106 | return parseDirectiveDS(IDVal, 12); |
2107 | case DK_PRINT: |
2108 | return parseDirectivePrint(IDLoc); |
2109 | } |
2110 | |
2111 | return Error(IDLoc, "unknown directive"); |
2112 | } |
2113 | |
2114 | // __asm _emit or __asm __emit |
2115 | if (ParsingInlineAsm && (IDVal == "_emit" || IDVal == "__emit" || |
2116 | IDVal == "_EMIT" || IDVal == "__EMIT")) |
2117 | return parseDirectiveMSEmit(IDLoc, Info, IDVal.size()); |
2118 | |
2119 | // __asm align |
2120 | if (ParsingInlineAsm && (IDVal == "align" || IDVal == "ALIGN")) |
2121 | return parseDirectiveMSAlign(IDLoc, Info); |
2122 | |
2123 | if (ParsingInlineAsm && (IDVal == "even" || IDVal == "EVEN")) |
2124 | Info.AsmRewrites->emplace_back(AOK_EVEN, IDLoc, 4); |
2125 | if (checkForValidSection()) |
2126 | return true; |
2127 | |
2128 | // Canonicalize the opcode to lower case. |
2129 | std::string OpcodeStr = IDVal.lower(); |
2130 | ParseInstructionInfo IInfo(Info.AsmRewrites); |
2131 | bool ParseHadError = getTargetParser().ParseInstruction(IInfo, OpcodeStr, ID, |
2132 | Info.ParsedOperands); |
2133 | Info.ParseError = ParseHadError; |
2134 | |
2135 | // Dump the parsed representation, if requested. |
2136 | if (getShowParsedOperands()) { |
2137 | SmallString<256> Str; |
2138 | raw_svector_ostream OS(Str); |
2139 | OS << "parsed instruction: ["; |
2140 | for (unsigned i = 0; i != Info.ParsedOperands.size(); ++i) { |
2141 | if (i != 0) |
2142 | OS << ", "; |
2143 | Info.ParsedOperands[i]->print(OS); |
2144 | } |
2145 | OS << "]"; |
2146 | |
2147 | printMessage(IDLoc, SourceMgr::DK_Note, OS.str()); |
2148 | } |
2149 | |
2150 | // Fail even if ParseInstruction erroneously returns false. |
2151 | if (hasPendingError() || ParseHadError) |
2152 | return true; |
2153 | |
2154 | // If we are generating dwarf for the current section then generate a .loc |
2155 | // directive for the instruction. |
2156 | if (!ParseHadError && getContext().getGenDwarfForAssembly() && |
2157 | getContext().getGenDwarfSectionSyms().count( |
2158 | getStreamer().getCurrentSectionOnly())) { |
2159 | unsigned Line; |
2160 | if (ActiveMacros.empty()) |
2161 | Line = SrcMgr.FindLineNumber(IDLoc, CurBuffer); |
2162 | else |
2163 | Line = SrcMgr.FindLineNumber(ActiveMacros.front()->InstantiationLoc, |
2164 | ActiveMacros.front()->ExitBuffer); |
2165 | |
2166 | // If we previously parsed a cpp hash file line comment then make sure the |
2167 | // current Dwarf File is for the CppHashFilename if not then emit the |
2168 | // Dwarf File table for it and adjust the line number for the .loc. |
2169 | if (!CppHashInfo.Filename.empty()) { |
2170 | unsigned FileNumber = getStreamer().EmitDwarfFileDirective( |
2171 | 0, StringRef(), CppHashInfo.Filename); |
2172 | getContext().setGenDwarfFileNumber(FileNumber); |
2173 | |
2174 | // Since SrcMgr.FindLineNumber() is slow and messes up the SourceMgr's |
2175 | // cache with the different Loc from the call above we save the last |
2176 | // info we queried here with SrcMgr.FindLineNumber(). |
2177 | unsigned CppHashLocLineNo; |
2178 | if (LastQueryIDLoc == CppHashInfo.Loc && |
2179 | LastQueryBuffer == CppHashInfo.Buf) |
2180 | CppHashLocLineNo = LastQueryLine; |
2181 | else { |
2182 | CppHashLocLineNo = |
2183 | SrcMgr.FindLineNumber(CppHashInfo.Loc, CppHashInfo.Buf); |
2184 | LastQueryLine = CppHashLocLineNo; |
2185 | LastQueryIDLoc = CppHashInfo.Loc; |
2186 | LastQueryBuffer = CppHashInfo.Buf; |
2187 | } |
2188 | Line = CppHashInfo.LineNumber - 1 + (Line - CppHashLocLineNo); |
2189 | } |
2190 | |
2191 | getStreamer().EmitDwarfLocDirective( |
2192 | getContext().getGenDwarfFileNumber(), Line, 0, |
2193 | DWARF2_LINE_DEFAULT_IS_STMT1 ? DWARF2_FLAG_IS_STMT(1 << 0) : 0, 0, 0, |
2194 | StringRef()); |
2195 | } |
2196 | |
2197 | // If parsing succeeded, match the instruction. |
2198 | if (!ParseHadError) { |
2199 | uint64_t ErrorInfo; |
2200 | if (getTargetParser().MatchAndEmitInstruction( |
2201 | IDLoc, Info.Opcode, Info.ParsedOperands, Out, ErrorInfo, |
2202 | getTargetParser().isParsingInlineAsm())) |
2203 | return true; |
2204 | } |
2205 | return false; |
2206 | } |
2207 | |
2208 | // Parse and erase curly braces marking block start/end |
2209 | bool |
2210 | AsmParser::parseCurlyBlockScope(SmallVectorImpl<AsmRewrite> &AsmStrRewrites) { |
2211 | // Identify curly brace marking block start/end |
2212 | if (Lexer.isNot(AsmToken::LCurly) && Lexer.isNot(AsmToken::RCurly)) |
2213 | return false; |
2214 | |
2215 | SMLoc StartLoc = Lexer.getLoc(); |
2216 | Lex(); // Eat the brace |
2217 | if (Lexer.is(AsmToken::EndOfStatement)) |
2218 | Lex(); // Eat EndOfStatement following the brace |
2219 | |
2220 | // Erase the block start/end brace from the output asm string |
2221 | AsmStrRewrites.emplace_back(AOK_Skip, StartLoc, Lexer.getLoc().getPointer() - |
2222 | StartLoc.getPointer()); |
2223 | return true; |
2224 | } |
2225 | |
2226 | /// parseCppHashLineFilenameComment as this: |
2227 | /// ::= # number "filename" |
2228 | bool AsmParser::parseCppHashLineFilenameComment(SMLoc L) { |
2229 | Lex(); // Eat the hash token. |
2230 | // Lexer only ever emits HashDirective if it fully formed if it's |
2231 | // done the checking already so this is an internal error. |
2232 | assert(getTok().is(AsmToken::Integer) &&(static_cast <bool> (getTok().is(AsmToken::Integer) && "Lexing Cpp line comment: Expected Integer") ? void (0) : __assert_fail ("getTok().is(AsmToken::Integer) && \"Lexing Cpp line comment: Expected Integer\"" , "/build/llvm-toolchain-snapshot-7~svn326551/lib/MC/MCParser/AsmParser.cpp" , 2233, __extension__ __PRETTY_FUNCTION__)) |
2233 | "Lexing Cpp line comment: Expected Integer")(static_cast <bool> (getTok().is(AsmToken::Integer) && "Lexing Cpp line comment: Expected Integer") ? void (0) : __assert_fail ("getTok().is(AsmToken::Integer) && \"Lexing Cpp line comment: Expected Integer\"" , "/build/llvm-toolchain-snapshot-7~svn326551/lib/MC/MCParser/AsmParser.cpp" , 2233, __extension__ __PRETTY_FUNCTION__)); |
2234 | int64_t LineNumber = getTok().getIntVal(); |
2235 | Lex(); |
2236 | assert(getTok().is(AsmToken::String) &&(static_cast <bool> (getTok().is(AsmToken::String) && "Lexing Cpp line comment: Expected String") ? void (0) : __assert_fail ("getTok().is(AsmToken::String) && \"Lexing Cpp line comment: Expected String\"" , "/build/llvm-toolchain-snapshot-7~svn326551/lib/MC/MCParser/AsmParser.cpp" , 2237, __extension__ __PRETTY_FUNCTION__)) |
2237 | "Lexing Cpp line comment: Expected String")(static_cast <bool> (getTok().is(AsmToken::String) && "Lexing Cpp line comment: Expected String") ? void (0) : __assert_fail ("getTok().is(AsmToken::String) && \"Lexing Cpp line comment: Expected String\"" , "/build/llvm-toolchain-snapshot-7~svn326551/lib/MC/MCParser/AsmParser.cpp" , 2237, __extension__ __PRETTY_FUNCTION__)); |
2238 | StringRef Filename = getTok().getString(); |
2239 | Lex(); |
2240 | |
2241 | // Get rid of the enclosing quotes. |
2242 | Filename = Filename.substr(1, Filename.size() - 2); |
2243 | |
2244 | // Save the SMLoc, Filename and LineNumber for later use by diagnostics. |
2245 | CppHashInfo.Loc = L; |
2246 | CppHashInfo.Filename = Filename; |
2247 | CppHashInfo.LineNumber = LineNumber; |
2248 | CppHashInfo.Buf = CurBuffer; |
2249 | return false; |
2250 | } |
2251 | |
2252 | /// \brief will use the last parsed cpp hash line filename comment |
2253 | /// for the Filename and LineNo if any in the diagnostic. |
2254 | void AsmParser::DiagHandler(const SMDiagnostic &Diag, void *Context) { |
2255 | const AsmParser *Parser = static_cast<const AsmParser *>(Context); |
2256 | raw_ostream &OS = errs(); |
2257 | |
2258 | const SourceMgr &DiagSrcMgr = *Diag.getSourceMgr(); |
2259 | SMLoc DiagLoc = Diag.getLoc(); |
2260 | unsigned DiagBuf = DiagSrcMgr.FindBufferContainingLoc(DiagLoc); |
2261 | unsigned CppHashBuf = |
2262 | Parser->SrcMgr.FindBufferContainingLoc(Parser->CppHashInfo.Loc); |
2263 | |
2264 | // Like SourceMgr::printMessage() we need to print the include stack if any |
2265 | // before printing the message. |
2266 | unsigned DiagCurBuffer = DiagSrcMgr.FindBufferContainingLoc(DiagLoc); |
2267 | if (!Parser->SavedDiagHandler && DiagCurBuffer && |
2268 | DiagCurBuffer != DiagSrcMgr.getMainFileID()) { |
2269 | SMLoc ParentIncludeLoc = DiagSrcMgr.getParentIncludeLoc(DiagCurBuffer); |
2270 | DiagSrcMgr.PrintIncludeStack(ParentIncludeLoc, OS); |
2271 | } |
2272 | |
2273 | // If we have not parsed a cpp hash line filename comment or the source |
2274 | // manager changed or buffer changed (like in a nested include) then just |
2275 | // print the normal diagnostic using its Filename and LineNo. |
2276 | if (!Parser->CppHashInfo.LineNumber || &DiagSrcMgr != &Parser->SrcMgr || |
2277 | DiagBuf != CppHashBuf) { |
2278 | if (Parser->SavedDiagHandler) |
2279 | Parser->SavedDiagHandler(Diag, Parser->SavedDiagContext); |
2280 | else |
2281 | Diag.print(nullptr, OS); |
2282 | return; |
2283 | } |
2284 | |
2285 | // Use the CppHashFilename and calculate a line number based on the |
2286 | // CppHashInfo.Loc and CppHashInfo.LineNumber relative to this Diag's SMLoc |
2287 | // for the diagnostic. |
2288 | const std::string &Filename = Parser->CppHashInfo.Filename; |
2289 | |
2290 | int DiagLocLineNo = DiagSrcMgr.FindLineNumber(DiagLoc, DiagBuf); |
2291 | int CppHashLocLineNo = |
2292 | Parser->SrcMgr.FindLineNumber(Parser->CppHashInfo.Loc, CppHashBuf); |
2293 | int LineNo = |
2294 | Parser->CppHashInfo.LineNumber - 1 + (DiagLocLineNo - CppHashLocLineNo); |
2295 | |
2296 | SMDiagnostic NewDiag(*Diag.getSourceMgr(), Diag.getLoc(), Filename, LineNo, |
2297 | Diag.getColumnNo(), Diag.getKind(), Diag.getMessage(), |
2298 | Diag.getLineContents(), Diag.getRanges()); |
2299 | |
2300 | if (Parser->SavedDiagHandler) |
2301 | Parser->SavedDiagHandler(NewDiag, Parser->SavedDiagContext); |
2302 | else |
2303 | NewDiag.print(nullptr, OS); |
2304 | } |
2305 | |
2306 | // FIXME: This is mostly duplicated from the function in AsmLexer.cpp. The |
2307 | // difference being that that function accepts '@' as part of identifiers and |
2308 | // we can't do that. AsmLexer.cpp should probably be changed to handle |
2309 | // '@' as a special case when needed. |
2310 | static bool isIdentifierChar(char c) { |
2311 | return isalnum(static_cast<unsigned char>(c)) || c == '_' || c == '$' || |
2312 | c == '.'; |
2313 | } |
2314 | |
2315 | bool AsmParser::expandMacro(raw_svector_ostream &OS, StringRef Body, |
2316 | ArrayRef<MCAsmMacroParameter> Parameters, |
2317 | ArrayRef<MCAsmMacroArgument> A, |
2318 | bool EnableAtPseudoVariable, SMLoc L) { |
2319 | unsigned NParameters = Parameters.size(); |
2320 | bool HasVararg = NParameters ? Parameters.back().Vararg : false; |
2321 | if ((!IsDarwin || NParameters != 0) && NParameters != A.size()) |
2322 | return Error(L, "Wrong number of arguments"); |
2323 | |
2324 | // A macro without parameters is handled differently on Darwin: |
2325 | // gas accepts no arguments and does no substitutions |
2326 | while (!Body.empty()) { |
2327 | // Scan for the next substitution. |
2328 | std::size_t End = Body.size(), Pos = 0; |
2329 | for (; Pos != End; ++Pos) { |
2330 | // Check for a substitution or escape. |
2331 | if (IsDarwin && !NParameters) { |
2332 | // This macro has no parameters, look for $0, $1, etc. |
2333 | if (Body[Pos] != '$' || Pos + 1 == End) |
2334 | continue; |
2335 | |
2336 | char Next = Body[Pos + 1]; |
2337 | if (Next == '$' || Next == 'n' || |
2338 | isdigit(static_cast<unsigned char>(Next))) |
2339 | break; |
2340 | } else { |
2341 | // This macro has parameters, look for \foo, \bar, etc. |
2342 | if (Body[Pos] == '\\' && Pos + 1 != End) |
2343 | break; |
2344 | } |
2345 | } |
2346 | |
2347 | // Add the prefix. |
2348 | OS << Body.slice(0, Pos); |
2349 | |
2350 | // Check if we reached the end. |
2351 | if (Pos == End) |
2352 | break; |
2353 | |
2354 | if (IsDarwin && !NParameters) { |
2355 | switch (Body[Pos + 1]) { |
2356 | // $$ => $ |
2357 | case '$': |
2358 | OS << '$'; |
2359 | break; |
2360 | |
2361 | // $n => number of arguments |
2362 | case 'n': |
2363 | OS << A.size(); |
2364 | break; |
2365 | |
2366 | // $[0-9] => argument |
2367 | default: { |
2368 | // Missing arguments are ignored. |
2369 | unsigned Index = Body[Pos + 1] - '0'; |
2370 | if (Index >= A.size()) |
2371 | break; |
2372 | |
2373 | // Otherwise substitute with the token values, with spaces eliminated. |
2374 | for (const AsmToken &Token : A[Index]) |
2375 | OS << Token.getString(); |
2376 | break; |
2377 | } |
2378 | } |
2379 | Pos += 2; |
2380 | } else { |
2381 | unsigned I = Pos + 1; |
2382 | |
2383 | // Check for the \@ pseudo-variable. |
2384 | if (EnableAtPseudoVariable && Body[I] == '@' && I + 1 != End) |
2385 | ++I; |
2386 | else |
2387 | while (isIdentifierChar(Body[I]) && I + 1 != End) |
2388 | ++I; |
2389 | |
2390 | const char *Begin = Body.data() + Pos + 1; |
2391 | StringRef Argument(Begin, I - (Pos + 1)); |
2392 | unsigned Index = 0; |
2393 | |
2394 | if (Argument == "@") { |
2395 | OS << NumOfMacroInstantiations; |
2396 | Pos += 2; |
2397 | } else { |
2398 | for (; Index < NParameters; ++Index) |
2399 | if (Parameters[Index].Name == Argument) |
2400 | break; |
2401 | |
2402 | if (Index == NParameters) { |
2403 | if (Body[Pos + 1] == '(' && Body[Pos + 2] == ')') |
2404 | Pos += 3; |
2405 | else { |
2406 | OS << '\\' << Argument; |
2407 | Pos = I; |
2408 | } |
2409 | } else { |
2410 | bool VarargParameter = HasVararg && Index == (NParameters - 1); |
2411 | for (const AsmToken &Token : A[Index]) |
2412 | // For altmacro mode, you can write '%expr'. |
2413 | // The prefix '%' evaluates the expression 'expr' |
2414 | // and uses the result as a string (e.g. replace %(1+2) with the string "3"). |
2415 | // Here, we identify the integer token which is the result of the |
2416 | // absolute expression evaluation and replace it with its string representation. |
2417 | if ((Lexer.IsaAltMacroMode()) && |
2418 | (*(Token.getString().begin()) == '%') && Token.is(AsmToken::Integer)) |
2419 | // Emit an integer value to the buffer. |
2420 | OS << Token.getIntVal(); |
2421 | // Only Token that was validated as a string and begins with '<' |
2422 | // is considered altMacroString!!! |
2423 | else if ((Lexer.IsaAltMacroMode()) && |
2424 | (*(Token.getString().begin()) == '<') && |
2425 | Token.is(AsmToken::String)) { |
2426 | std::string Res; |
2427 | altMacroString(Token.getStringContents(), Res); |
2428 | OS << Res; |
2429 | } |
2430 | // We expect no quotes around the string's contents when |
2431 | // parsing for varargs. |
2432 | else if (Token.isNot(AsmToken::String) || VarargParameter) |
2433 | OS << Token.getString(); |
2434 | else |
2435 | OS << Token.getStringContents(); |
2436 | |
2437 | Pos += 1 + Argument.size(); |
2438 | } |
2439 | } |
2440 | } |
2441 | // Update the scan point. |
2442 | Body = Body.substr(Pos); |
2443 | } |
2444 | |
2445 | return false; |
2446 | } |
2447 | |
2448 | MacroInstantiation::MacroInstantiation(SMLoc IL, int EB, SMLoc EL, |
2449 | size_t CondStackDepth) |
2450 | : InstantiationLoc(IL), ExitBuffer(EB), ExitLoc(EL), |
2451 | CondStackDepth(CondStackDepth) {} |
2452 | |
2453 | static bool isOperator(AsmToken::TokenKind kind) { |
2454 | switch (kind) { |
2455 | default: |
2456 | return false; |
2457 | case AsmToken::Plus: |
2458 | case AsmToken::Minus: |
2459 | case AsmToken::Tilde: |
2460 | case AsmToken::Slash: |
2461 | case AsmToken::Star: |
2462 | case AsmToken::Dot: |
2463 | case AsmToken::Equal: |
2464 | case AsmToken::EqualEqual: |
2465 | case AsmToken::Pipe: |
2466 | case AsmToken::PipePipe: |
2467 | case AsmToken::Caret: |
2468 | case AsmToken::Amp: |
2469 | case AsmToken::AmpAmp: |
2470 | case AsmToken::Exclaim: |
2471 | case AsmToken::ExclaimEqual: |
2472 | case AsmToken::Less: |
2473 | case AsmToken::LessEqual: |
2474 | case AsmToken::LessLess: |
2475 | case AsmToken::LessGreater: |
2476 | case AsmToken::Greater: |
2477 | case AsmToken::GreaterEqual: |
2478 | case AsmToken::GreaterGreater: |
2479 | return true; |
2480 | } |
2481 | } |
2482 | |
2483 | namespace { |
2484 | |
2485 | class AsmLexerSkipSpaceRAII { |
2486 | public: |
2487 | AsmLexerSkipSpaceRAII(AsmLexer &Lexer, bool SkipSpace) : Lexer(Lexer) { |
2488 | Lexer.setSkipSpace(SkipSpace); |
2489 | } |
2490 | |
2491 | ~AsmLexerSkipSpaceRAII() { |
2492 | Lexer.setSkipSpace(true); |
2493 | } |
2494 | |
2495 | private: |
2496 | AsmLexer &Lexer; |
2497 | }; |
2498 | |
2499 | } // end anonymous namespace |
2500 | |
2501 | bool AsmParser::parseMacroArgument(MCAsmMacroArgument &MA, bool Vararg) { |
2502 | |
2503 | if (Vararg) { |
2504 | if (Lexer.isNot(AsmToken::EndOfStatement)) { |
2505 | StringRef Str = parseStringToEndOfStatement(); |
2506 | MA.emplace_back(AsmToken::String, Str); |
2507 | } |
2508 | return false; |
2509 | } |
2510 | |
2511 | unsigned ParenLevel = 0; |
2512 | |
2513 | // Darwin doesn't use spaces to delmit arguments. |
2514 | AsmLexerSkipSpaceRAII ScopedSkipSpace(Lexer, IsDarwin); |
2515 | |
2516 | bool SpaceEaten; |
2517 | |
2518 | while (true) { |
2519 | SpaceEaten = false; |
2520 | if (Lexer.is(AsmToken::Eof) || Lexer.is(AsmToken::Equal)) |
2521 | return TokError("unexpected token in macro instantiation"); |
2522 | |
2523 | if (ParenLevel == 0) { |
2524 | |
2525 | if (Lexer.is(AsmToken::Comma)) |
2526 | break; |
2527 | |
2528 | if (Lexer.is(AsmToken::Space)) { |
2529 | SpaceEaten = true; |
2530 | Lexer.Lex(); // Eat spaces |
2531 | } |
2532 | |
2533 | // Spaces can delimit parameters, but could also be part an expression. |
2534 | // If the token after a space is an operator, add the token and the next |
2535 | // one into this argument |
2536 | if (!IsDarwin) { |
2537 | if (isOperator(Lexer.getKind())) { |
2538 | MA.push_back(getTok()); |
2539 | Lexer.Lex(); |
2540 | |
2541 | // Whitespace after an operator can be ignored. |
2542 | if (Lexer.is(AsmToken::Space)) |
2543 | Lexer.Lex(); |
2544 | |
2545 | continue; |
2546 | } |
2547 | } |
2548 | if (SpaceEaten) |
2549 | break; |
2550 | } |
2551 | |
2552 | // handleMacroEntry relies on not advancing the lexer here |
2553 | // to be able to fill in the remaining default parameter values |
2554 | if (Lexer.is(AsmToken::EndOfStatement)) |
2555 | break; |
2556 | |
2557 | // Adjust the current parentheses level. |
2558 | if (Lexer.is(AsmToken::LParen)) |
2559 | ++ParenLevel; |
2560 | else if (Lexer.is(AsmToken::RParen) && ParenLevel) |
2561 | --ParenLevel; |
2562 | |
2563 | // Append the token to the current argument list. |
2564 | MA.push_back(getTok()); |
2565 | Lexer.Lex(); |
2566 | } |
2567 | |
2568 | if (ParenLevel != 0) |
2569 | return TokError("unbalanced parentheses in macro argument"); |
2570 | return false; |
2571 | } |
2572 | |
2573 | // Parse the macro instantiation arguments. |
2574 | bool AsmParser::parseMacroArguments(const MCAsmMacro *M, |
2575 | MCAsmMacroArguments &A) { |
2576 | const unsigned NParameters = M ? M->Parameters.size() : 0; |
2577 | bool NamedParametersFound = false; |
2578 | SmallVector<SMLoc, 4> FALocs; |
2579 | |
2580 | A.resize(NParameters); |
2581 | FALocs.resize(NParameters); |
2582 | |
2583 | // Parse two kinds of macro invocations: |
2584 | // - macros defined without any parameters accept an arbitrary number of them |
2585 | // - macros defined with parameters accept at most that many of them |
2586 | bool HasVararg = NParameters ? M->Parameters.back().Vararg : false; |
2587 | for (unsigned Parameter = 0; !NParameters || Parameter < NParameters; |
2588 | ++Parameter) { |
2589 | SMLoc IDLoc = Lexer.getLoc(); |
2590 | MCAsmMacroParameter FA; |
2591 | |
2592 | if (Lexer.is(AsmToken::Identifier) && Lexer.peekTok().is(AsmToken::Equal)) { |
2593 | if (parseIdentifier(FA.Name)) |
2594 | return Error(IDLoc, "invalid argument identifier for formal argument"); |
2595 | |
2596 | if (Lexer.isNot(AsmToken::Equal)) |
2597 | return TokError("expected '=' after formal parameter identifier"); |
2598 | |
2599 | Lex(); |
2600 | |
2601 | NamedParametersFound = true; |
2602 | } |
2603 | bool Vararg = HasVararg && Parameter == (NParameters - 1); |
2604 | |
2605 | if (NamedParametersFound && FA.Name.empty()) |
2606 | return Error(IDLoc, "cannot mix positional and keyword arguments"); |
2607 | |
2608 | SMLoc StrLoc = Lexer.getLoc(); |
2609 | SMLoc EndLoc; |
2610 | if (Lexer.IsaAltMacroMode() && Lexer.is(AsmToken::Percent)) { |
2611 | const MCExpr *AbsoluteExp; |
2612 | int64_t Value; |
2613 | /// Eat '%' |
2614 | Lex(); |
2615 | if (parseExpression(AbsoluteExp, EndLoc)) |
2616 | return false; |
2617 | if (!AbsoluteExp->evaluateAsAbsolute(Value)) |
2618 | return Error(StrLoc, "expected absolute expression"); |
2619 | const char *StrChar = StrLoc.getPointer(); |
2620 | const char *EndChar = EndLoc.getPointer(); |
2621 | AsmToken newToken(AsmToken::Integer, StringRef(StrChar , EndChar - StrChar), Value); |
2622 | FA.Value.push_back(newToken); |
2623 | } else if (Lexer.IsaAltMacroMode() && Lexer.is(AsmToken::Less) && |
2624 | isAltmacroString(StrLoc, EndLoc)) { |
2625 | const char *StrChar = StrLoc.getPointer(); |
2626 | const char *EndChar = EndLoc.getPointer(); |
2627 | jumpToLoc(EndLoc, CurBuffer); |
2628 | /// Eat from '<' to '>' |
2629 | Lex(); |
2630 | AsmToken newToken(AsmToken::String, StringRef(StrChar, EndChar - StrChar)); |
2631 | FA.Value.push_back(newToken); |
2632 | } else if(parseMacroArgument(FA.Value, Vararg)) |
2633 | return true; |
2634 | |
2635 | unsigned PI = Parameter; |
2636 | if (!FA.Name.empty()) { |
2637 | unsigned FAI = 0; |
2638 | for (FAI = 0; FAI < NParameters; ++FAI) |
2639 | if (M->Parameters[FAI].Name == FA.Name) |
2640 | break; |
2641 | |
2642 | if (FAI >= NParameters) { |
2643 | assert(M && "expected macro to be defined")(static_cast <bool> (M && "expected macro to be defined" ) ? void (0) : __assert_fail ("M && \"expected macro to be defined\"" , "/build/llvm-toolchain-snapshot-7~svn326551/lib/MC/MCParser/AsmParser.cpp" , 2643, __extension__ __PRETTY_FUNCTION__)); |
2644 | return Error(IDLoc, "parameter named '" + FA.Name + |
2645 | "' does not exist for macro '" + M->Name + "'"); |
2646 | } |
2647 | PI = FAI; |
2648 | } |
2649 | |
2650 | if (!FA.Value.empty()) { |
2651 | if (A.size() <= PI) |
2652 | A.resize(PI + 1); |
2653 | A[PI] = FA.Value; |
2654 | |
2655 | if (FALocs.size() <= PI) |
2656 | FALocs.resize(PI + 1); |
2657 | |
2658 | FALocs[PI] = Lexer.getLoc(); |
2659 | } |
2660 | |
2661 | // At the end of the statement, fill in remaining arguments that have |
2662 | // default values. If there aren't any, then the next argument is |
2663 | // required but missing |
2664 | if (Lexer.is(AsmToken::EndOfStatement)) { |
2665 | bool Failure = false; |
2666 | for (unsigned FAI = 0; FAI < NParameters; ++FAI) { |
2667 | if (A[FAI].empty()) { |
2668 | if (M->Parameters[FAI].Required) { |
2669 | Error(FALocs[FAI].isValid() ? FALocs[FAI] : Lexer.getLoc(), |
2670 | "missing value for required parameter " |
2671 | "'" + M->Parameters[FAI].Name + "' in macro '" + M->Name + "'"); |
2672 | Failure = true; |
2673 | } |
2674 | |
2675 | if (!M->Parameters[FAI].Value.empty()) |
2676 | A[FAI] = M->Parameters[FAI].Value; |
2677 | } |
2678 | } |
2679 | return Failure; |
2680 | } |
2681 | |
2682 | if (Lexer.is(AsmToken::Comma)) |
2683 | Lex(); |
2684 | } |
2685 | |
2686 | return TokError("too many positional arguments"); |
2687 | } |
2688 | |
2689 | bool AsmParser::handleMacroEntry(const MCAsmMacro *M, SMLoc NameLoc) { |
2690 | // Arbitrarily limit macro nesting depth (default matches 'as'). We can |
2691 | // eliminate this, although we should protect against infinite loops. |
2692 | unsigned MaxNestingDepth = AsmMacroMaxNestingDepth; |
2693 | if (ActiveMacros.size() == MaxNestingDepth) { |
2694 | std::ostringstream MaxNestingDepthError; |
2695 | MaxNestingDepthError << "macros cannot be nested more than " |
2696 | << MaxNestingDepth << " levels deep." |
2697 | << " Use -asm-macro-max-nesting-depth to increase " |
2698 | "this limit."; |
2699 | return TokError(MaxNestingDepthError.str()); |
2700 | } |
2701 | |
2702 | MCAsmMacroArguments A; |
2703 | if (parseMacroArguments(M, A)) |
2704 | return true; |
2705 | |
2706 | // Macro instantiation is lexical, unfortunately. We construct a new buffer |
2707 | // to hold the macro body with substitutions. |
2708 | SmallString<256> Buf; |
2709 | StringRef Body = M->Body; |
2710 | raw_svector_ostream OS(Buf); |
2711 | |
2712 | if (expandMacro(OS, Body, M->Parameters, A, true, getTok().getLoc())) |
2713 | return true; |
2714 | |
2715 | // We include the .endmacro in the buffer as our cue to exit the macro |
2716 | // instantiation. |
2717 | OS << ".endmacro\n"; |
2718 | |
2719 | std::unique_ptr<MemoryBuffer> Instantiation = |
2720 | MemoryBuffer::getMemBufferCopy(OS.str(), "<instantiation>"); |
2721 | |
2722 | // Create the macro instantiation object and add to the current macro |
2723 | // instantiation stack. |
2724 | MacroInstantiation *MI = new MacroInstantiation( |
2725 | NameLoc, CurBuffer, getTok().getLoc(), TheCondStack.size()); |
2726 | ActiveMacros.push_back(MI); |
2727 | |
2728 | ++NumOfMacroInstantiations; |
2729 | |
2730 | // Jump to the macro instantiation and prime the lexer. |
2731 | CurBuffer = SrcMgr.AddNewSourceBuffer(std::move(Instantiation), SMLoc()); |
2732 | Lexer.setBuffer(SrcMgr.getMemoryBuffer(CurBuffer)->getBuffer()); |
2733 | Lex(); |
2734 | |
2735 | return false; |
2736 | } |
2737 | |
2738 | void AsmParser::handleMacroExit() { |
2739 | // Jump to the EndOfStatement we should return to, and consume it. |
2740 | jumpToLoc(ActiveMacros.back()->ExitLoc, ActiveMacros.back()->ExitBuffer); |
2741 | Lex(); |
2742 | |
2743 | // Pop the instantiation entry. |
2744 | delete ActiveMacros.back(); |
2745 | ActiveMacros.pop_back(); |
2746 | } |
2747 | |
2748 | bool AsmParser::parseAssignment(StringRef Name, bool allow_redef, |
2749 | bool NoDeadStrip) { |
2750 | MCSymbol *Sym; |
2751 | const MCExpr *Value; |
2752 | if (MCParserUtils::parseAssignmentExpression(Name, allow_redef, *this, Sym, |
2753 | Value)) |
2754 | return true; |
2755 | |
2756 | if (!Sym) { |
2757 | // In the case where we parse an expression starting with a '.', we will |
2758 | // not generate an error, nor will we create a symbol. In this case we |
2759 | // should just return out. |
2760 | return false; |
2761 | } |
2762 | |
2763 | // Do the assignment. |
2764 | Out.EmitAssignment(Sym, Value); |
2765 | if (NoDeadStrip) |
2766 | Out.EmitSymbolAttribute(Sym, MCSA_NoDeadStrip); |
2767 | |
2768 | return false; |
2769 | } |
2770 | |
2771 | /// parseIdentifier: |
2772 | /// ::= identifier |
2773 | /// ::= string |
2774 | bool AsmParser::parseIdentifier(StringRef &Res) { |
2775 | // The assembler has relaxed rules for accepting identifiers, in particular we |
2776 | // allow things like '.globl $foo' and '.def @feat.00', which would normally be |
2777 | // separate tokens. At this level, we have already lexed so we cannot (currently) |
2778 | // handle this as a context dependent token, instead we detect adjacent tokens |
2779 | // and return the combined identifier. |
2780 | if (Lexer.is(AsmToken::Dollar) || Lexer.is(AsmToken::At)) { |
2781 | SMLoc PrefixLoc = getLexer().getLoc(); |
2782 | |
2783 | // Consume the prefix character, and check for a following identifier. |
2784 | |
2785 | AsmToken Buf[1]; |
2786 | Lexer.peekTokens(Buf, false); |
2787 | |
2788 | if (Buf[0].isNot(AsmToken::Identifier)) |
2789 | return true; |
2790 | |
2791 | // We have a '$' or '@' followed by an identifier, make sure they are adjacent. |
2792 | if (PrefixLoc.getPointer() + 1 != Buf[0].getLoc().getPointer()) |
2793 | return true; |
2794 | |
2795 | // eat $ or @ |
2796 | Lexer.Lex(); // Lexer's Lex guarantees consecutive token. |
2797 | // Construct the joined identifier and consume the token. |
2798 | Res = |
2799 | StringRef(PrefixLoc.getPointer(), getTok().getIdentifier().size() + 1); |
2800 | Lex(); // Parser Lex to maintain invariants. |
2801 | return false; |
2802 | } |
2803 | |
2804 | if (Lexer.isNot(AsmToken::Identifier) && Lexer.isNot(AsmToken::String)) |
2805 | return true; |
2806 | |
2807 | Res = getTok().getIdentifier(); |
2808 | |
2809 | Lex(); // Consume the identifier token. |
2810 | |
2811 | return false; |
2812 | } |
2813 | |
2814 | /// parseDirectiveSet: |
2815 | /// ::= .equ identifier ',' expression |
2816 | /// ::= .equiv identifier ',' expression |
2817 | /// ::= .set identifier ',' expression |
2818 | bool AsmParser::parseDirectiveSet(StringRef IDVal, bool allow_redef) { |
2819 | StringRef Name; |
2820 | if (check(parseIdentifier(Name), "expected identifier") || |
2821 | parseToken(AsmToken::Comma) || parseAssignment(Name, allow_redef, true)) |
2822 | return addErrorSuffix(" in '" + Twine(IDVal) + "' directive"); |
2823 | return false; |
2824 | } |
2825 | |
2826 | bool AsmParser::parseEscapedString(std::string &Data) { |
2827 | if (check(getTok().isNot(AsmToken::String), "expected string")) |
2828 | return true; |
2829 | |
2830 | Data = ""; |
2831 | StringRef Str = getTok().getStringContents(); |
2832 | for (unsigned i = 0, e = Str.size(); i != e; ++i) { |
2833 | if (Str[i] != '\\') { |
2834 | Data += Str[i]; |
2835 | continue; |
2836 | } |
2837 | |
2838 | // Recognize escaped characters. Note that this escape semantics currently |
2839 | // loosely follows Darwin 'as'. Notably, it doesn't support hex escapes. |
2840 | ++i; |
2841 | if (i == e) |
2842 | return TokError("unexpected backslash at end of string"); |
2843 | |
2844 | // Recognize octal sequences. |
2845 | if ((unsigned)(Str[i] - '0') <= 7) { |
2846 | // Consume up to three octal characters. |
2847 | unsigned Value = Str[i] - '0'; |
2848 | |
2849 | if (i + 1 != e && ((unsigned)(Str[i + 1] - '0')) <= 7) { |
2850 | ++i; |
2851 | Value = Value * 8 + (Str[i] - '0'); |
2852 | |
2853 | if (i + 1 != e && ((unsigned)(Str[i + 1] - '0')) <= 7) { |
2854 | ++i; |
2855 | Value = Value * 8 + (Str[i] - '0'); |
2856 | } |
2857 | } |
2858 | |
2859 | if (Value > 255) |
2860 | return TokError("invalid octal escape sequence (out of range)"); |
2861 | |
2862 | Data += (unsigned char)Value; |
2863 | continue; |
2864 | } |
2865 | |
2866 | // Otherwise recognize individual escapes. |
2867 | switch (Str[i]) { |
2868 | default: |
2869 | // Just reject invalid escape sequences for now. |
2870 | return TokError("invalid escape sequence (unrecognized character)"); |
2871 | |
2872 | case 'b': Data += '\b'; break; |
2873 | case 'f': Data += '\f'; break; |
2874 | case 'n': Data += '\n'; break; |
2875 | case 'r': Data += '\r'; break; |
2876 | case 't': Data += '\t'; break; |
2877 | case '"': Data += '"'; break; |
2878 | case '\\': Data += '\\'; break; |
2879 | } |
2880 | } |
2881 | |
2882 | Lex(); |
2883 | return false; |
2884 | } |
2885 | |
2886 | /// parseDirectiveAscii: |
2887 | /// ::= ( .ascii | .asciz | .string ) [ "string" ( , "string" )* ] |
2888 | bool AsmParser::parseDirectiveAscii(StringRef IDVal, bool ZeroTerminated) { |
2889 | auto parseOp = [&]() -> bool { |
2890 | std::string Data; |
2891 | if (checkForValidSection() || parseEscapedString(Data)) |
2892 | return true; |
2893 | getStreamer().EmitBytes(Data); |
2894 | if (ZeroTerminated) |
2895 | getStreamer().EmitBytes(StringRef("\0", 1)); |
2896 | return false; |
2897 | }; |
2898 | |
2899 | if (parseMany(parseOp)) |
2900 | return addErrorSuffix(" in '" + Twine(IDVal) + "' directive"); |
2901 | return false; |
2902 | } |
2903 | |
2904 | /// parseDirectiveReloc |
2905 | /// ::= .reloc expression , identifier [ , expression ] |
2906 | bool AsmParser::parseDirectiveReloc(SMLoc DirectiveLoc) { |
2907 | const MCExpr *Offset; |
2908 | const MCExpr *Expr = nullptr; |
2909 | |
2910 | SMLoc OffsetLoc = Lexer.getTok().getLoc(); |
2911 | int64_t OffsetValue; |
2912 | // We can only deal with constant expressions at the moment. |
2913 | |
2914 | if (parseExpression(Offset)) |
2915 | return true; |
2916 | |
2917 | if (check(!Offset->evaluateAsAbsolute(OffsetValue), OffsetLoc, |
2918 | "expression is not a constant value") || |
2919 | check(OffsetValue < 0, OffsetLoc, "expression is negative") || |
2920 | parseToken(AsmToken::Comma, "expected comma") || |
2921 | check(getTok().isNot(AsmToken::Identifier), "expected relocation name")) |
2922 | return true; |
2923 | |
2924 | SMLoc NameLoc = Lexer.getTok().getLoc(); |
2925 | StringRef Name = Lexer.getTok().getIdentifier(); |
2926 | Lex(); |
2927 | |
2928 | if (Lexer.is(AsmToken::Comma)) { |
2929 | Lex(); |
2930 | SMLoc ExprLoc = Lexer.getLoc(); |
2931 | if (parseExpression(Expr)) |
2932 | return true; |
2933 | |
2934 | MCValue Value; |
2935 | if (!Expr->evaluateAsRelocatable(Value, nullptr, nullptr)) |
2936 | return Error(ExprLoc, "expression must be relocatable"); |
2937 | } |
2938 | |
2939 | if (parseToken(AsmToken::EndOfStatement, |
2940 | "unexpected token in .reloc directive")) |
2941 | return true; |
2942 | |
2943 | if (getStreamer().EmitRelocDirective(*Offset, Name, Expr, DirectiveLoc)) |
2944 | return Error(NameLoc, "unknown relocation name"); |
2945 | |
2946 | return false; |
2947 | } |
2948 | |
2949 | /// parseDirectiveValue |
2950 | /// ::= (.byte | .short | ... ) [ expression (, expression)* ] |
2951 | bool AsmParser::parseDirectiveValue(StringRef IDVal, unsigned Size) { |
2952 | auto parseOp = [&]() -> bool { |
2953 | const MCExpr *Value; |
2954 | SMLoc ExprLoc = getLexer().getLoc(); |
2955 | if (checkForValidSection() || parseExpression(Value)) |
2956 | return true; |
2957 | // Special case constant expressions to match code generator. |
2958 | if (const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Value)) { |
2959 | assert(Size <= 8 && "Invalid size")(static_cast <bool> (Size <= 8 && "Invalid size" ) ? void (0) : __assert_fail ("Size <= 8 && \"Invalid size\"" , "/build/llvm-toolchain-snapshot-7~svn326551/lib/MC/MCParser/AsmParser.cpp" , 2959, __extension__ __PRETTY_FUNCTION__)); |
2960 | uint64_t IntValue = MCE->getValue(); |
2961 | if (!isUIntN(8 * Size, IntValue) && !isIntN(8 * Size, IntValue)) |
2962 | return Error(ExprLoc, "out of range literal value"); |
2963 | getStreamer().EmitIntValue(IntValue, Size); |
2964 | } else |
2965 | getStreamer().EmitValue(Value, Size, ExprLoc); |
2966 | return false; |
2967 | }; |
2968 | |
2969 | if (parseMany(parseOp)) |
2970 | return addErrorSuffix(" in '" + Twine(IDVal) + "' directive"); |
2971 | return false; |
2972 | } |
2973 | |
2974 | /// ParseDirectiveOctaValue |
2975 | /// ::= .octa [ hexconstant (, hexconstant)* ] |
2976 | |
2977 | bool AsmParser::parseDirectiveOctaValue(StringRef IDVal) { |
2978 | auto parseOp = [&]() -> bool { |
2979 | if (checkForValidSection()) |
2980 | return true; |
2981 | if (getTok().isNot(AsmToken::Integer) && getTok().isNot(AsmToken::BigNum)) |
2982 | return TokError("unknown token in expression"); |
2983 | SMLoc ExprLoc = getTok().getLoc(); |
2984 | APInt IntValue = getTok().getAPIntVal(); |
2985 | uint64_t hi, lo; |
2986 | Lex(); |
2987 | if (!IntValue.isIntN(128)) |
2988 | return Error(ExprLoc, "out of range literal value"); |
2989 | if (!IntValue.isIntN(64)) { |
2990 | hi = IntValue.getHiBits(IntValue.getBitWidth() - 64).getZExtValue(); |
2991 | lo = IntValue.getLoBits(64).getZExtValue(); |
2992 | } else { |
2993 | hi = 0; |
2994 | lo = IntValue.getZExtValue(); |
2995 | } |
2996 | if (MAI.isLittleEndian()) { |
2997 | getStreamer().EmitIntValue(lo, 8); |
2998 | getStreamer().EmitIntValue(hi, 8); |
2999 | } else { |
3000 | getStreamer().EmitIntValue(hi, 8); |
3001 | getStreamer().EmitIntValue(lo, 8); |
3002 | } |
3003 | return false; |
3004 | }; |
3005 | |
3006 | if (parseMany(parseOp)) |
3007 | return addErrorSuffix(" in '" + Twine(IDVal) + "' directive"); |
3008 | return false; |
3009 | } |
3010 | |
3011 | bool AsmParser::parseRealValue(const fltSemantics &Semantics, APInt &Res) { |
3012 | // We don't truly support arithmetic on floating point expressions, so we |
3013 | // have to manually parse unary prefixes. |
3014 | bool IsNeg = false; |
3015 | if (getLexer().is(AsmToken::Minus)) { |
3016 | Lexer.Lex(); |
3017 | IsNeg = true; |
3018 | } else if (getLexer().is(AsmToken::Plus)) |
3019 | Lexer.Lex(); |
3020 | |
3021 | if (Lexer.is(AsmToken::Error)) |
3022 | return TokError(Lexer.getErr()); |
3023 | if (Lexer.isNot(AsmToken::Integer) && Lexer.isNot(AsmToken::Real) && |
3024 | Lexer.isNot(AsmToken::Identifier)) |
3025 | return TokError("unexpected token in directive"); |
3026 | |
3027 | // Convert to an APFloat. |
3028 | APFloat Value(Semantics); |
3029 | StringRef IDVal = getTok().getString(); |
3030 | if (getLexer().is(AsmToken::Identifier)) { |
3031 | if (!IDVal.compare_lower("infinity") || !IDVal.compare_lower("inf")) |
3032 | Value = APFloat::getInf(Semantics); |
3033 | else if (!IDVal.compare_lower("nan")) |
3034 | Value = APFloat::getNaN(Semantics, false, ~0); |
3035 | else |
3036 | return TokError("invalid floating point literal"); |
3037 | } else if (Value.convertFromString(IDVal, APFloat::rmNearestTiesToEven) == |
3038 | APFloat::opInvalidOp) |
3039 | return TokError("invalid floating point literal"); |
3040 | if (IsNeg) |
3041 | Value.changeSign(); |
3042 | |
3043 | // Consume the numeric token. |
3044 | Lex(); |
3045 | |
3046 | Res = Value.bitcastToAPInt(); |
3047 | |
3048 | return false; |
3049 | } |
3050 | |
3051 | /// parseDirectiveRealValue |
3052 | /// ::= (.single | .double) [ expression (, expression)* ] |
3053 | bool AsmParser::parseDirectiveRealValue(StringRef IDVal, |
3054 | const fltSemantics &Semantics) { |
3055 | auto parseOp = [&]() -> bool { |
3056 | APInt AsInt; |
3057 | if (checkForValidSection() || parseRealValue(Semantics, AsInt)) |
3058 | return true; |
3059 | getStreamer().EmitIntValue(AsInt.getLimitedValue(), |
3060 | AsInt.getBitWidth() / 8); |
3061 | return false; |
3062 | }; |
3063 | |
3064 | if (parseMany(parseOp)) |
3065 | return addErrorSuffix(" in '" + Twine(IDVal) + "' directive"); |
3066 | return false; |
3067 | } |
3068 | |
3069 | /// parseDirectiveZero |
3070 | /// ::= .zero expression |
3071 | bool AsmParser::parseDirectiveZero() { |
3072 | SMLoc NumBytesLoc = Lexer.getLoc(); |
3073 | const MCExpr *NumBytes; |
3074 | if (checkForValidSection() || parseExpression(NumBytes)) |
3075 | return true; |
3076 | |
3077 | int64_t Val = 0; |
3078 | if (getLexer().is(AsmToken::Comma)) { |
3079 | Lex(); |
3080 | if (parseAbsoluteExpression(Val)) |
3081 | return true; |
3082 | } |
3083 | |
3084 | if (parseToken(AsmToken::EndOfStatement, |
3085 | "unexpected token in '.zero' directive")) |
3086 | return true; |
3087 | getStreamer().emitFill(*NumBytes, Val, NumBytesLoc); |
3088 | |
3089 | return false; |
3090 | } |
3091 | |
3092 | /// parseDirectiveFill |
3093 | /// ::= .fill expression [ , expression [ , expression ] ] |
3094 | bool AsmParser::parseDirectiveFill() { |
3095 | SMLoc NumValuesLoc = Lexer.getLoc(); |
3096 | const MCExpr *NumValues; |
3097 | if (checkForValidSection() || parseExpression(NumValues)) |
3098 | return true; |
3099 | |
3100 | int64_t FillSize = 1; |
3101 | int64_t FillExpr = 0; |
3102 | |
3103 | SMLoc SizeLoc, ExprLoc; |
3104 | |
3105 | if (parseOptionalToken(AsmToken::Comma)) { |
3106 | SizeLoc = getTok().getLoc(); |
3107 | if (parseAbsoluteExpression(FillSize)) |
3108 | return true; |
3109 | if (parseOptionalToken(AsmToken::Comma)) { |
3110 | ExprLoc = getTok().getLoc(); |
3111 | if (parseAbsoluteExpression(FillExpr)) |
3112 | return true; |
3113 | } |
3114 | } |
3115 | if (parseToken(AsmToken::EndOfStatement, |
3116 | "unexpected token in '.fill' directive")) |
3117 | return true; |
3118 | |
3119 | if (FillSize < 0) { |
3120 | Warning(SizeLoc, "'.fill' directive with negative size has no effect"); |
3121 | return false; |
3122 | } |
3123 | if (FillSize > 8) { |
3124 | Warning(SizeLoc, "'.fill' directive with size greater than 8 has been truncated to 8"); |
3125 | FillSize = 8; |
3126 | } |
3127 | |
3128 | if (!isUInt<32>(FillExpr) && FillSize > 4) |
3129 | Warning(ExprLoc, "'.fill' directive pattern has been truncated to 32-bits"); |
3130 | |
3131 | getStreamer().emitFill(*NumValues, FillSize, FillExpr, NumValuesLoc); |
3132 | |
3133 | return false; |
3134 | } |
3135 | |
3136 | /// parseDirectiveOrg |
3137 | /// ::= .org expression [ , expression ] |
3138 | bool AsmParser::parseDirectiveOrg() { |
3139 | const MCExpr *Offset; |
3140 | SMLoc OffsetLoc = Lexer.getLoc(); |
3141 | if (checkForValidSection() || parseExpression(Offset)) |
3142 | return true; |
3143 | |
3144 | // Parse optional fill expression. |
3145 | int64_t FillExpr = 0; |
3146 | if (parseOptionalToken(AsmToken::Comma)) |
3147 | if (parseAbsoluteExpression(FillExpr)) |
3148 | return addErrorSuffix(" in '.org' directive"); |
3149 | if (parseToken(AsmToken::EndOfStatement)) |
3150 | return addErrorSuffix(" in '.org' directive"); |
3151 | |
3152 | getStreamer().emitValueToOffset(Offset, FillExpr, OffsetLoc); |
3153 | return false; |
3154 | } |
3155 | |
3156 | /// parseDirectiveAlign |
3157 | /// ::= {.align, ...} expression [ , expression [ , expression ]] |
3158 | bool AsmParser::parseDirectiveAlign(bool IsPow2, unsigned ValueSize) { |
3159 | SMLoc AlignmentLoc = getLexer().getLoc(); |
3160 | int64_t Alignment; |
3161 | SMLoc MaxBytesLoc; |
3162 | bool HasFillExpr = false; |
3163 | int64_t FillExpr = 0; |
3164 | int64_t MaxBytesToFill = 0; |
3165 | |
3166 | auto parseAlign = [&]() -> bool { |
3167 | if (parseAbsoluteExpression(Alignment)) |
3168 | return true; |
3169 | if (parseOptionalToken(AsmToken::Comma)) { |
3170 | // The fill expression can be omitted while specifying a maximum number of |
3171 | // alignment bytes, e.g: |
3172 | // .align 3,,4 |
3173 | if (getTok().isNot(AsmToken::Comma)) { |
3174 | HasFillExpr = true; |
3175 | if (parseAbsoluteExpression(FillExpr)) |
3176 | return true; |
3177 | } |
3178 | if (parseOptionalToken(AsmToken::Comma)) |
3179 | if (parseTokenLoc(MaxBytesLoc) || |
3180 | parseAbsoluteExpression(MaxBytesToFill)) |
3181 | return true; |
3182 | } |
3183 | return parseToken(AsmToken::EndOfStatement); |
3184 | }; |
3185 | |
3186 | if (checkForValidSection()) |
3187 | return addErrorSuffix(" in directive"); |
3188 | // Ignore empty '.p2align' directives for GNU-as compatibility |
3189 | if (IsPow2 && (ValueSize == 1) && getTok().is(AsmToken::EndOfStatement)) { |
3190 | Warning(AlignmentLoc, "p2align directive with no operand(s) is ignored"); |
3191 | return parseToken(AsmToken::EndOfStatement); |
3192 | } |
3193 | if (parseAlign()) |
3194 | return addErrorSuffix(" in directive"); |
3195 | |
3196 | // Always emit an alignment here even if we thrown an error. |
3197 | bool ReturnVal = false; |
3198 | |
3199 | // Compute alignment in bytes. |
3200 | if (IsPow2) { |
3201 | // FIXME: Diagnose overflow. |
3202 | if (Alignment >= 32) { |
3203 | ReturnVal |= Error(AlignmentLoc, "invalid alignment value"); |
3204 | Alignment = 31; |
3205 | } |
3206 | |
3207 | Alignment = 1ULL << Alignment; |
3208 | } else { |
3209 | // Reject alignments that aren't either a power of two or zero, |
3210 | // for gas compatibility. Alignment of zero is silently rounded |
3211 | // up to one. |
3212 | if (Alignment == 0) |
3213 | Alignment = 1; |
3214 | if (!isPowerOf2_64(Alignment)) |
3215 | ReturnVal |= Error(AlignmentLoc, "alignment must be a power of 2"); |
3216 | } |
3217 | |
3218 | // Diagnose non-sensical max bytes to align. |
3219 | if (MaxBytesLoc.isValid()) { |
3220 | if (MaxBytesToFill < 1) { |
3221 | ReturnVal |= Error(MaxBytesLoc, |
3222 | "alignment directive can never be satisfied in this " |
3223 | "many bytes, ignoring maximum bytes expression"); |
3224 | MaxBytesToFill = 0; |
3225 | } |
3226 | |
3227 | if (MaxBytesToFill >= Alignment) { |
3228 | Warning(MaxBytesLoc, "maximum bytes expression exceeds alignment and " |
3229 | "has no effect"); |
3230 | MaxBytesToFill = 0; |
3231 | } |
3232 | } |
3233 | |
3234 | // Check whether we should use optimal code alignment for this .align |
3235 | // directive. |
3236 | const MCSection *Section = getStreamer().getCurrentSectionOnly(); |
3237 | assert(Section && "must have section to emit alignment")(static_cast <bool> (Section && "must have section to emit alignment" ) ? void (0) : __assert_fail ("Section && \"must have section to emit alignment\"" , "/build/llvm-toolchain-snapshot-7~svn326551/lib/MC/MCParser/AsmParser.cpp" , 3237, __extension__ __PRETTY_FUNCTION__)); |
3238 | bool UseCodeAlign = Section->UseCodeAlign(); |
3239 | if ((!HasFillExpr || Lexer.getMAI().getTextAlignFillValue() == FillExpr) && |
3240 | ValueSize == 1 && UseCodeAlign) { |
3241 | getStreamer().EmitCodeAlignment(Alignment, MaxBytesToFill); |
3242 | } else { |
3243 | // FIXME: Target specific behavior about how the "extra" bytes are filled. |
3244 | getStreamer().EmitValueToAlignment(Alignment, FillExpr, ValueSize, |
3245 | MaxBytesToFill); |
3246 | } |
3247 | |
3248 | return ReturnVal; |
3249 | } |
3250 | |
3251 | /// parseDirectiveFile |
3252 | /// ::= .file filename |
3253 | /// ::= .file number [directory] filename [md5 checksum] [source source-text] |
3254 | bool AsmParser::parseDirectiveFile(SMLoc DirectiveLoc) { |
3255 | // FIXME: I'm not sure what this is. |
3256 | int64_t FileNumber = -1; |
3257 | if (getLexer().is(AsmToken::Integer)) { |
3258 | FileNumber = getTok().getIntVal(); |
3259 | Lex(); |
3260 | |
3261 | if (FileNumber < 1) |
3262 | return TokError("file number less than one"); |
3263 | } |
3264 | |
3265 | std::string Path = getTok().getString(); |
3266 | |
3267 | // Usually the directory and filename together, otherwise just the directory. |
3268 | // Allow the strings to have escaped octal character sequence. |
3269 | if (check(getTok().isNot(AsmToken::String), |
3270 | "unexpected token in '.file' directive") || |
3271 | parseEscapedString(Path)) |
3272 | return true; |
3273 | |
3274 | StringRef Directory; |
3275 | StringRef Filename; |
3276 | std::string FilenameData; |
3277 | if (getLexer().is(AsmToken::String)) { |
3278 | if (check(FileNumber == -1, |
3279 | "explicit path specified, but no file number") || |
3280 | parseEscapedString(FilenameData)) |
3281 | return true; |
3282 | Filename = FilenameData; |
3283 | Directory = Path; |
3284 | } else { |
3285 | Filename = Path; |
3286 | } |
3287 | |
3288 | std::string Checksum; |
3289 | |
3290 | Optional<StringRef> Source; |
3291 | bool HasSource = false; |
3292 | std::string SourceString; |
3293 | |
3294 | while (!parseOptionalToken(AsmToken::EndOfStatement)) { |
3295 | StringRef Keyword; |
3296 | if (check(getTok().isNot(AsmToken::Identifier), |
3297 | "unexpected token in '.file' directive") || |
3298 | parseIdentifier(Keyword)) |
3299 | return true; |
3300 | if (Keyword == "md5") { |
3301 | if (check(FileNumber == -1, |
3302 | "MD5 checksum specified, but no file number") || |
3303 | check(getTok().isNot(AsmToken::String), |
3304 | "unexpected token in '.file' directive") || |
3305 | parseEscapedString(Checksum) || |
3306 | check(Checksum.size() != 32, "invalid MD5 checksum specified")) |
3307 | return true; |
3308 | } else if (Keyword == "source") { |
3309 | HasSource = true; |
3310 | if (check(FileNumber == -1, |
3311 | "source specified, but no file number") || |
3312 | check(getTok().isNot(AsmToken::String), |
3313 | "unexpected token in '.file' directive") || |
3314 | parseEscapedString(SourceString)) |
3315 | return true; |
3316 | } else { |
3317 | return TokError("unexpected token in '.file' directive"); |
3318 | } |
3319 | } |
3320 | |
3321 | if (FileNumber == -1) |
3322 | getStreamer().EmitFileDirective(Filename); |
3323 | else { |
3324 | MD5::MD5Result *CKMem = nullptr; |
3325 | if (!Checksum.empty()) { |
3326 | Checksum = fromHex(Checksum); |
3327 | if (check(Checksum.size() != 16, "invalid MD5 checksum specified")) |
3328 | return true; |
3329 | CKMem = (MD5::MD5Result *)Ctx.allocate(sizeof(MD5::MD5Result), 1); |
3330 | memcpy(&CKMem->Bytes, Checksum.data(), 16); |
3331 | } |
3332 | if (HasSource) { |
3333 | char *SourceBuf = static_cast<char *>(Ctx.allocate(SourceString.size())); |
3334 | memcpy(SourceBuf, SourceString.data(), SourceString.size()); |
3335 | Source = StringRef(SourceBuf, SourceString.size()); |
3336 | } |
3337 | // If there is -g option as well as debug info from directive file, |
3338 | // we turn off -g option, directly use the existing debug info instead. |
3339 | if (getContext().getGenDwarfForAssembly()) |
3340 | getContext().setGenDwarfForAssembly(false); |
3341 | else { |
3342 | Expected<unsigned> FileNumOrErr = getStreamer().tryEmitDwarfFileDirective( |
3343 | FileNumber, Directory, Filename, CKMem, Source); |
3344 | if (!FileNumOrErr) |
3345 | return Error(DirectiveLoc, toString(FileNumOrErr.takeError())); |
3346 | FileNumber = FileNumOrErr.get(); |
Value stored to 'FileNumber' is never read | |
3347 | } |
3348 | } |
3349 | |
3350 | return false; |
3351 | } |
3352 | |
3353 | /// parseDirectiveLine |
3354 | /// ::= .line [number] |
3355 | bool AsmParser::parseDirectiveLine() { |
3356 | int64_t LineNumber; |
3357 | if (getLexer().is(AsmToken::Integer)) { |
3358 | if (parseIntToken(LineNumber, "unexpected token in '.line' directive")) |
3359 | return true; |
3360 | (void)LineNumber; |
3361 | // FIXME: Do something with the .line. |
3362 | } |
3363 | if (parseToken(AsmToken::EndOfStatement, |
3364 | "unexpected token in '.line' directive")) |
3365 | return true; |
3366 | |
3367 | return false; |
3368 | } |
3369 | |
3370 | /// parseDirectiveLoc |
3371 | /// ::= .loc FileNumber [LineNumber] [ColumnPos] [basic_block] [prologue_end] |
3372 | /// [epilogue_begin] [is_stmt VALUE] [isa VALUE] |
3373 | /// The first number is a file number, must have been previously assigned with |
3374 | /// a .file directive, the second number is the line number and optionally the |
3375 | /// third number is a column position (zero if not specified). The remaining |
3376 | /// optional items are .loc sub-directives. |
3377 | bool AsmParser::parseDirectiveLoc() { |
3378 | int64_t FileNumber = 0, LineNumber = 0; |
3379 | SMLoc Loc = getTok().getLoc(); |
3380 | if (parseIntToken(FileNumber, "unexpected token in '.loc' directive") || |
3381 | check(FileNumber < 1, Loc, |
3382 | "file number less than one in '.loc' directive") || |
3383 | check(!getContext().isValidDwarfFileNumber(FileNumber), Loc, |
3384 | "unassigned file number in '.loc' directive")) |
3385 | return true; |
3386 | |
3387 | // optional |
3388 | if (getLexer().is(AsmToken::Integer)) { |
3389 | LineNumber = getTok().getIntVal(); |
3390 | if (LineNumber < 0) |
3391 | return TokError("line number less than zero in '.loc' directive"); |
3392 | Lex(); |
3393 | } |
3394 | |
3395 | int64_t ColumnPos = 0; |
3396 | if (getLexer().is(AsmToken::Integer)) { |
3397 | ColumnPos = getTok().getIntVal(); |
3398 | if (ColumnPos < 0) |
3399 | return TokError("column position less than zero in '.loc' directive"); |
3400 | Lex(); |
3401 | } |
3402 | |
3403 | unsigned Flags = DWARF2_LINE_DEFAULT_IS_STMT1 ? DWARF2_FLAG_IS_STMT(1 << 0) : 0; |
3404 | unsigned Isa = 0; |
3405 | int64_t Discriminator = 0; |
3406 | |
3407 | auto parseLocOp = [&]() -> bool { |
3408 | StringRef Name; |
3409 | SMLoc Loc = getTok().getLoc(); |
3410 | if (parseIdentifier(Name)) |
3411 | return TokError("unexpected token in '.loc' directive"); |
3412 | |
3413 | if (Name == "basic_block") |
3414 | Flags |= DWARF2_FLAG_BASIC_BLOCK(1 << 1); |
3415 | else if (Name == "prologue_end") |
3416 | Flags |= DWARF2_FLAG_PROLOGUE_END(1 << 2); |
3417 | else if (Name == "epilogue_begin") |
3418 | Flags |= DWARF2_FLAG_EPILOGUE_BEGIN(1 << 3); |
3419 | else if (Name == "is_stmt") { |
3420 | Loc = getTok().getLoc(); |
3421 | const MCExpr *Value; |
3422 | if (parseExpression(Value)) |
3423 | return true; |
3424 | // The expression must be the constant 0 or 1. |
3425 | if (const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Value)) { |
3426 | int Value = MCE->getValue(); |
3427 | if (Value == 0) |
3428 | Flags &= ~DWARF2_FLAG_IS_STMT(1 << 0); |
3429 | else if (Value == 1) |
3430 | Flags |= DWARF2_FLAG_IS_STMT(1 << 0); |
3431 | else |
3432 | return Error(Loc, "is_stmt value not 0 or 1"); |
3433 | } else { |
3434 | return Error(Loc, "is_stmt value not the constant value of 0 or 1"); |
3435 | } |
3436 | } else if (Name == "isa") { |
3437 | Loc = getTok().getLoc(); |
3438 | const MCExpr *Value; |
3439 | if (parseExpression(Value)) |
3440 | return true; |
3441 | // The expression must be a constant greater or equal to 0. |
3442 | if (const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Value)) { |
3443 | int Value = MCE->getValue(); |
3444 | if (Value < 0) |
3445 | return Error(Loc, "isa number less than zero"); |
3446 | Isa = Value; |
3447 | } else { |
3448 | return Error(Loc, "isa number not a constant value"); |
3449 | } |
3450 | } else if (Name == "discriminator") { |
3451 | if (parseAbsoluteExpression(Discriminator)) |
3452 | return true; |
3453 | } else { |
3454 | return Error(Loc, "unknown sub-directive in '.loc' directive"); |
3455 | } |
3456 | return false; |
3457 | }; |
3458 | |
3459 | if (parseMany(parseLocOp, false /*hasComma*/)) |
3460 | return true; |
3461 | |
3462 | getStreamer().EmitDwarfLocDirective(FileNumber, LineNumber, ColumnPos, Flags, |
3463 | Isa, Discriminator, StringRef()); |
3464 | |
3465 | return false; |
3466 | } |
3467 | |
3468 | /// parseDirectiveStabs |
3469 | /// ::= .stabs string, number, number, number |
3470 | bool AsmParser::parseDirectiveStabs() { |
3471 | return TokError("unsupported directive '.stabs'"); |
3472 | } |
3473 | |
3474 | /// parseDirectiveCVFile |
3475 | /// ::= .cv_file number filename [checksum] [checksumkind] |
3476 | bool AsmParser::parseDirectiveCVFile() { |
3477 | SMLoc FileNumberLoc = getTok().getLoc(); |
3478 | int64_t FileNumber; |
3479 | std::string Filename; |
3480 | std::string Checksum; |
3481 | int64_t ChecksumKind = 0; |
3482 | |
3483 | if (parseIntToken(FileNumber, |
3484 | "expected file number in '.cv_file' directive") || |
3485 | check(FileNumber < 1, FileNumberLoc, "file number less than one") || |
3486 | check(getTok().isNot(AsmToken::String), |
3487 | "unexpected token in '.cv_file' directive") || |
3488 | parseEscapedString(Filename)) |
3489 | return true; |
3490 | if (!parseOptionalToken(AsmToken::EndOfStatement)) { |
3491 | if (check(getTok().isNot(AsmToken::String), |
3492 | "unexpected token in '.cv_file' directive") || |
3493 | parseEscapedString(Checksum) || |
3494 | parseIntToken(ChecksumKind, |
3495 | "expected checksum kind in '.cv_file' directive") || |
3496 | parseToken(AsmToken::EndOfStatement, |
3497 | "unexpected token in '.cv_file' directive")) |
3498 | return true; |
3499 | } |
3500 | |
3501 | Checksum = fromHex(Checksum); |
3502 | void *CKMem = Ctx.allocate(Checksum.size(), 1); |
3503 | memcpy(CKMem, Checksum.data(), Checksum.size()); |
3504 | ArrayRef<uint8_t> ChecksumAsBytes(reinterpret_cast<const uint8_t *>(CKMem), |
3505 | Checksum.size()); |
3506 | |
3507 | if (!getStreamer().EmitCVFileDirective(FileNumber, Filename, ChecksumAsBytes, |
3508 | static_cast<uint8_t>(ChecksumKind))) |
3509 | return Error(FileNumberLoc, "file number already allocated"); |
3510 | |
3511 | return false; |
3512 | } |
3513 | |
3514 | bool AsmParser::parseCVFunctionId(int64_t &FunctionId, |
3515 | StringRef DirectiveName) { |
3516 | SMLoc Loc; |
3517 | return parseTokenLoc(Loc) || |
3518 | parseIntToken(FunctionId, "expected function id in '" + DirectiveName + |
3519 | "' directive") || |
3520 | check(FunctionId < 0 || FunctionId >= UINT_MAX(2147483647 *2U +1U), Loc, |
3521 | "expected function id within range [0, UINT_MAX)"); |
3522 | } |
3523 | |
3524 | bool AsmParser::parseCVFileId(int64_t &FileNumber, StringRef DirectiveName) { |
3525 | SMLoc Loc; |
3526 | return parseTokenLoc(Loc) || |
3527 | parseIntToken(FileNumber, "expected integer in '" + DirectiveName + |
3528 | "' directive") || |
3529 | check(FileNumber < 1, Loc, "file number less than one in '" + |
3530 | DirectiveName + "' directive") || |
3531 | check(!getCVContext().isValidFileNumber(FileNumber), Loc, |
3532 | "unassigned file number in '" + DirectiveName + "' directive"); |
3533 | } |
3534 | |
3535 | /// parseDirectiveCVFuncId |
3536 | /// ::= .cv_func_id FunctionId |
3537 | /// |
3538 | /// Introduces a function ID that can be used with .cv_loc. |
3539 | bool AsmParser::parseDirectiveCVFuncId() { |
3540 | SMLoc FunctionIdLoc = getTok().getLoc(); |
3541 | int64_t FunctionId; |
3542 | |
3543 | if (parseCVFunctionId(FunctionId, ".cv_func_id") || |
3544 | parseToken(AsmToken::EndOfStatement, |
3545 | "unexpected token in '.cv_func_id' directive")) |
3546 | return true; |
3547 | |
3548 | if (!getStreamer().EmitCVFuncIdDirective(FunctionId)) |
3549 | return Error(FunctionIdLoc, "function id already allocated"); |
3550 | |
3551 | return false; |
3552 | } |
3553 | |
3554 | /// parseDirectiveCVInlineSiteId |
3555 | /// ::= .cv_inline_site_id FunctionId |
3556 | /// "within" IAFunc |
3557 | /// "inlined_at" IAFile IALine [IACol] |
3558 | /// |
3559 | /// Introduces a function ID that can be used with .cv_loc. Includes "inlined |
3560 | /// at" source location information for use in the line table of the caller, |
3561 | /// whether the caller is a real function or another inlined call site. |
3562 | bool AsmParser::parseDirectiveCVInlineSiteId() { |
3563 | SMLoc FunctionIdLoc = getTok().getLoc(); |
3564 | int64_t FunctionId; |
3565 | int64_t IAFunc; |
3566 | int64_t IAFile; |
3567 | int64_t IALine; |
3568 | int64_t IACol = 0; |
3569 | |
3570 | // FunctionId |
3571 | if (parseCVFunctionId(FunctionId, ".cv_inline_site_id")) |
3572 | return true; |
3573 | |
3574 | // "within" |
3575 | if (check((getLexer().isNot(AsmToken::Identifier) || |
3576 | getTok().getIdentifier() != "within"), |
3577 | "expected 'within' identifier in '.cv_inline_site_id' directive")) |
3578 | return true; |
3579 | Lex(); |
3580 | |
3581 | // IAFunc |
3582 | if (parseCVFunctionId(IAFunc, ".cv_inline_site_id")) |
3583 | return true; |
3584 | |
3585 | // "inlined_at" |
3586 | if (check((getLexer().isNot(AsmToken::Identifier) || |
3587 | getTok().getIdentifier() != "inlined_at"), |
3588 | "expected 'inlined_at' identifier in '.cv_inline_site_id' " |
3589 | "directive") ) |
3590 | return true; |
3591 | Lex(); |
3592 | |
3593 | // IAFile IALine |
3594 | if (parseCVFileId(IAFile, ".cv_inline_site_id") || |
3595 | parseIntToken(IALine, "expected line number after 'inlined_at'")) |
3596 | return true; |
3597 | |
3598 | // [IACol] |
3599 | if (getLexer().is(AsmToken::Integer)) { |
3600 | IACol = getTok().getIntVal(); |
3601 | Lex(); |
3602 | } |
3603 | |
3604 | if (parseToken(AsmToken::EndOfStatement, |
3605 | "unexpected token in '.cv_inline_site_id' directive")) |
3606 | return true; |
3607 | |
3608 | if (!getStreamer().EmitCVInlineSiteIdDirective(FunctionId, IAFunc, IAFile, |
3609 | IALine, IACol, FunctionIdLoc)) |
3610 | return Error(FunctionIdLoc, "function id already allocated"); |
3611 | |
3612 | return false; |
3613 | } |
3614 | |
3615 | /// parseDirectiveCVLoc |
3616 | /// ::= .cv_loc FunctionId FileNumber [LineNumber] [ColumnPos] [prologue_end] |
3617 | /// [is_stmt VALUE] |
3618 | /// The first number is a file number, must have been previously assigned with |
3619 | /// a .file directive, the second number is the line number and optionally the |
3620 | /// third number is a column position (zero if not specified). The remaining |
3621 | /// optional items are .loc sub-directives. |
3622 | bool AsmParser::parseDirectiveCVLoc() { |
3623 | SMLoc DirectiveLoc = getTok().getLoc(); |
3624 | int64_t FunctionId, FileNumber; |
3625 | if (parseCVFunctionId(FunctionId, ".cv_loc") || |
3626 | parseCVFileId(FileNumber, ".cv_loc")) |
3627 | return true; |
3628 | |
3629 | int64_t LineNumber = 0; |
3630 | if (getLexer().is(AsmToken::Integer)) { |
3631 | LineNumber = getTok().getIntVal(); |
3632 | if (LineNumber < 0) |
3633 | return TokError("line number less than zero in '.cv_loc' directive"); |
3634 | Lex(); |
3635 | } |
3636 | |
3637 | int64_t ColumnPos = 0; |
3638 | if (getLexer().is(AsmToken::Integer)) { |
3639 | ColumnPos = getTok().getIntVal(); |
3640 | if (ColumnPos < 0) |
3641 | return TokError("column position less than zero in '.cv_loc' directive"); |
3642 | Lex(); |
3643 | } |
3644 | |
3645 | bool PrologueEnd = false; |
3646 | uint64_t IsStmt = 0; |
3647 | |
3648 | auto parseOp = [&]() -> bool { |
3649 | StringRef Name; |
3650 | SMLoc Loc = getTok().getLoc(); |
3651 | if (parseIdentifier(Name)) |
3652 | return TokError("unexpected token in '.cv_loc' directive"); |
3653 | if (Name == "prologue_end") |
3654 | PrologueEnd = true; |
3655 | else if (Name == "is_stmt") { |
3656 | Loc = getTok().getLoc(); |
3657 | const MCExpr *Value; |
3658 | if (parseExpression(Value)) |
3659 | return true; |
3660 | // The expression must be the constant 0 or 1. |
3661 | IsStmt = ~0ULL; |
3662 | if (const auto *MCE = dyn_cast<MCConstantExpr>(Value)) |
3663 | IsStmt = MCE->getValue(); |
3664 | |
3665 | if (IsStmt > 1) |
3666 | return Error(Loc, "is_stmt value not 0 or 1"); |
3667 | } else { |
3668 | return Error(Loc, "unknown sub-directive in '.cv_loc' directive"); |
3669 | } |
3670 | return false; |
3671 | }; |
3672 | |
3673 | if (parseMany(parseOp, false /*hasComma*/)) |
3674 | return true; |
3675 | |
3676 | getStreamer().EmitCVLocDirective(FunctionId, FileNumber, LineNumber, |
3677 | ColumnPos, PrologueEnd, IsStmt, StringRef(), |
3678 | DirectiveLoc); |
3679 | return false; |
3680 | } |
3681 | |
3682 | /// parseDirectiveCVLinetable |
3683 | /// ::= .cv_linetable FunctionId, FnStart, FnEnd |
3684 | bool AsmParser::parseDirectiveCVLinetable() { |
3685 | int64_t FunctionId; |
3686 | StringRef FnStartName, FnEndName; |
3687 | SMLoc Loc = getTok().getLoc(); |
3688 | if (parseCVFunctionId(FunctionId, ".cv_linetable") || |
3689 | parseToken(AsmToken::Comma, |
3690 | "unexpected token in '.cv_linetable' directive") || |
3691 | parseTokenLoc(Loc) || check(parseIdentifier(FnStartName), Loc, |
3692 | "expected identifier in directive") || |
3693 | parseToken(AsmToken::Comma, |
3694 | "unexpected token in '.cv_linetable' directive") || |
3695 | parseTokenLoc(Loc) || check(parseIdentifier(FnEndName), Loc, |
3696 | "expected identifier in directive")) |
3697 | return true; |
3698 | |
3699 | MCSymbol *FnStartSym = getContext().getOrCreateSymbol(FnStartName); |
3700 | MCSymbol *FnEndSym = getContext().getOrCreateSymbol(FnEndName); |
3701 | |
3702 | getStreamer().EmitCVLinetableDirective(FunctionId, FnStartSym, FnEndSym); |
3703 | return false; |
3704 | } |
3705 | |
3706 | /// parseDirectiveCVInlineLinetable |
3707 | /// ::= .cv_inline_linetable PrimaryFunctionId FileId LineNum FnStart FnEnd |
3708 | bool AsmParser::parseDirectiveCVInlineLinetable() { |
3709 | int64_t PrimaryFunctionId, SourceFileId, SourceLineNum; |
3710 | StringRef FnStartName, FnEndName; |
3711 | SMLoc Loc = getTok().getLoc(); |
3712 | if (parseCVFunctionId(PrimaryFunctionId, ".cv_inline_linetable") || |
3713 | parseTokenLoc(Loc) || |
3714 | parseIntToken( |
3715 | SourceFileId, |
3716 | "expected SourceField in '.cv_inline_linetable' directive") || |
3717 | check(SourceFileId <= 0, Loc, |
3718 | "File id less than zero in '.cv_inline_linetable' directive") || |
3719 | parseTokenLoc(Loc) || |
3720 | parseIntToken( |
3721 | SourceLineNum, |
3722 | "expected SourceLineNum in '.cv_inline_linetable' directive") || |
3723 | check(SourceLineNum < 0, Loc, |
3724 | "Line number less than zero in '.cv_inline_linetable' directive") || |
3725 | parseTokenLoc(Loc) || check(parseIdentifier(FnStartName), Loc, |
3726 | "expected identifier in directive") || |
3727 | parseTokenLoc(Loc) || check(parseIdentifier(FnEndName), Loc, |
3728 | "expected identifier in directive")) |
3729 | return true; |
3730 | |
3731 | if (parseToken(AsmToken::EndOfStatement, "Expected End of Statement")) |
3732 | return true; |
3733 | |
3734 | MCSymbol *FnStartSym = getContext().getOrCreateSymbol(FnStartName); |
3735 | MCSymbol *FnEndSym = getContext().getOrCreateSymbol(FnEndName); |
3736 | getStreamer().EmitCVInlineLinetableDirective(PrimaryFunctionId, SourceFileId, |
3737 | SourceLineNum, FnStartSym, |
3738 | FnEndSym); |
3739 | return false; |
3740 | } |
3741 | |
3742 | /// parseDirectiveCVDefRange |
3743 | /// ::= .cv_def_range RangeStart RangeEnd (GapStart GapEnd)*, bytes* |
3744 | bool AsmParser::parseDirectiveCVDefRange() { |
3745 | SMLoc Loc; |
3746 | std::vector<std::pair<const MCSymbol *, const MCSymbol *>> Ranges; |
3747 | while (getLexer().is(AsmToken::Identifier)) { |
3748 | Loc = getLexer().getLoc(); |
3749 | StringRef GapStartName; |
3750 | if (parseIdentifier(GapStartName)) |
3751 | return Error(Loc, "expected identifier in directive"); |
3752 | MCSymbol *GapStartSym = getContext().getOrCreateSymbol(GapStartName); |
3753 | |
3754 | Loc = getLexer().getLoc(); |
3755 | StringRef GapEndName; |
3756 | if (parseIdentifier(GapEndName)) |
3757 | return Error(Loc, "expected identifier in directive"); |
3758 | MCSymbol *GapEndSym = getContext().getOrCreateSymbol(GapEndName); |
3759 | |
3760 | Ranges.push_back({GapStartSym, GapEndSym}); |
3761 | } |
3762 | |
3763 | std::string FixedSizePortion; |
3764 | if (parseToken(AsmToken::Comma, "unexpected token in directive") || |
3765 | parseEscapedString(FixedSizePortion)) |
3766 | return true; |
3767 | |
3768 | getStreamer().EmitCVDefRangeDirective(Ranges, FixedSizePortion); |
3769 | return false; |
3770 | } |
3771 | |
3772 | /// parseDirectiveCVStringTable |
3773 | /// ::= .cv_stringtable |
3774 | bool AsmParser::parseDirectiveCVStringTable() { |
3775 | getStreamer().EmitCVStringTableDirective(); |
3776 | return false; |
3777 | } |
3778 | |
3779 | /// parseDirectiveCVFileChecksums |
3780 | /// ::= .cv_filechecksums |
3781 | bool AsmParser::parseDirectiveCVFileChecksums() { |
3782 | getStreamer().EmitCVFileChecksumsDirective(); |
3783 | return false; |
3784 | } |
3785 | |
3786 | /// parseDirectiveCVFileChecksumOffset |
3787 | /// ::= .cv_filechecksumoffset fileno |
3788 | bool AsmParser::parseDirectiveCVFileChecksumOffset() { |
3789 | int64_t FileNo; |
3790 | if (parseIntToken(FileNo, "expected identifier in directive")) |
3791 | return true; |
3792 | if (parseToken(AsmToken::EndOfStatement, "Expected End of Statement")) |
3793 | return true; |
3794 | getStreamer().EmitCVFileChecksumOffsetDirective(FileNo); |
3795 | return false; |
3796 | } |
3797 | |
3798 | /// parseDirectiveCVFPOData |
3799 | /// ::= .cv_fpo_data procsym |
3800 | bool AsmParser::parseDirectiveCVFPOData() { |
3801 | SMLoc DirLoc = getLexer().getLoc(); |
3802 | StringRef ProcName; |
3803 | if (parseIdentifier(ProcName)) |
3804 | return TokError("expected symbol name"); |
3805 | if (parseEOL("unexpected tokens")) |
3806 | return addErrorSuffix(" in '.cv_fpo_data' directive"); |
3807 | MCSymbol *ProcSym = getContext().getOrCreateSymbol(ProcName); |
3808 | getStreamer().EmitCVFPOData(ProcSym, DirLoc); |
3809 | return false; |
3810 | } |
3811 | |
3812 | /// parseDirectiveCFISections |
3813 | /// ::= .cfi_sections section [, section] |
3814 | bool AsmParser::parseDirectiveCFISections() { |
3815 | StringRef Name; |
3816 | bool EH = false; |
3817 | bool Debug = false; |
3818 | |
3819 | if (parseIdentifier(Name)) |
3820 | return TokError("Expected an identifier"); |
3821 | |
3822 | if (Name == ".eh_frame") |
3823 | EH = true; |
3824 | else if (Name == ".debug_frame") |
3825 | Debug = true; |
3826 | |
3827 | if (getLexer().is(AsmToken::Comma)) { |
3828 | Lex(); |
3829 | |
3830 | if (parseIdentifier(Name)) |
3831 | return TokError("Expected an identifier"); |
3832 | |
3833 | if (Name == ".eh_frame") |
3834 | EH = true; |
3835 | else if (Name == ".debug_frame") |
3836 | Debug = true; |
3837 | } |
3838 | |
3839 | getStreamer().EmitCFISections(EH, Debug); |
3840 | return false; |
3841 | } |
3842 | |
3843 | /// parseDirectiveCFIStartProc |
3844 | /// ::= .cfi_startproc [simple] |
3845 | bool AsmParser::parseDirectiveCFIStartProc() { |
3846 | StringRef Simple; |
3847 | if (!parseOptionalToken(AsmToken::EndOfStatement)) { |
3848 | if (check(parseIdentifier(Simple) || Simple != "simple", |
3849 | "unexpected token") || |
3850 | parseToken(AsmToken::EndOfStatement)) |
3851 | return addErrorSuffix(" in '.cfi_startproc' directive"); |
3852 | } |
3853 | |
3854 | getStreamer().EmitCFIStartProc(!Simple.empty()); |
3855 | return false; |
3856 | } |
3857 | |
3858 | /// parseDirectiveCFIEndProc |
3859 | /// ::= .cfi_endproc |
3860 | bool AsmParser::parseDirectiveCFIEndProc() { |
3861 | getStreamer().EmitCFIEndProc(); |
3862 | return false; |
3863 | } |
3864 | |
3865 | /// \brief parse register name or number. |
3866 | bool AsmParser::parseRegisterOrRegisterNumber(int64_t &Register, |
3867 | SMLoc DirectiveLoc) { |
3868 | unsigned RegNo; |
3869 | |
3870 | if (getLexer().isNot(AsmToken::Integer)) { |
3871 | if (getTargetParser().ParseRegister(RegNo, DirectiveLoc, DirectiveLoc)) |
3872 | return true; |
3873 | Register = getContext().getRegisterInfo()->getDwarfRegNum(RegNo, true); |
3874 | } else |
3875 | return parseAbsoluteExpression(Register); |
3876 | |
3877 | return false; |
3878 | } |
3879 | |
3880 | /// parseDirectiveCFIDefCfa |
3881 | /// ::= .cfi_def_cfa register, offset |
3882 | bool AsmParser::parseDirectiveCFIDefCfa(SMLoc DirectiveLoc) { |
3883 | int64_t Register = 0, Offset = 0; |
3884 | if (parseRegisterOrRegisterNumber(Register, DirectiveLoc) || |
3885 | parseToken(AsmToken::Comma, "unexpected token in directive") || |
3886 | parseAbsoluteExpression(Offset)) |
3887 | return true; |
3888 | |
3889 | getStreamer().EmitCFIDefCfa(Register, Offset); |
3890 | return false; |
3891 | } |
3892 | |
3893 | /// parseDirectiveCFIDefCfaOffset |
3894 | /// ::= .cfi_def_cfa_offset offset |
3895 | bool AsmParser::parseDirectiveCFIDefCfaOffset() { |
3896 | int64_t Offset = 0; |
3897 | if (parseAbsoluteExpression(Offset)) |
3898 | return true; |
3899 | |
3900 | getStreamer().EmitCFIDefCfaOffset(Offset); |
3901 | return false; |
3902 | } |
3903 | |
3904 | /// parseDirectiveCFIRegister |
3905 | /// ::= .cfi_register register, register |
3906 | bool AsmParser::parseDirectiveCFIRegister(SMLoc DirectiveLoc) { |
3907 | int64_t Register1 = 0, Register2 = 0; |
3908 | if (parseRegisterOrRegisterNumber(Register1, DirectiveLoc) || |
3909 | parseToken(AsmToken::Comma, "unexpected token in directive") || |
3910 | parseRegisterOrRegisterNumber(Register2, DirectiveLoc)) |
3911 | return true; |
3912 | |
3913 | getStreamer().EmitCFIRegister(Register1, Register2); |
3914 | return false; |
3915 | } |
3916 | |
3917 | /// parseDirectiveCFIWindowSave |
3918 | /// ::= .cfi_window_save |
3919 | bool AsmParser::parseDirectiveCFIWindowSave() { |
3920 | getStreamer().EmitCFIWindowSave(); |
3921 | return false; |
3922 | } |
3923 | |
3924 | /// parseDirectiveCFIAdjustCfaOffset |
3925 | /// ::= .cfi_adjust_cfa_offset adjustment |
3926 | bool AsmParser::parseDirectiveCFIAdjustCfaOffset() { |
3927 | int64_t Adjustment = 0; |
3928 | if (parseAbsoluteExpression(Adjustment)) |
3929 | return true; |
3930 | |
3931 | getStreamer().EmitCFIAdjustCfaOffset(Adjustment); |
3932 | return false; |
3933 | } |
3934 | |
3935 | /// parseDirectiveCFIDefCfaRegister |
3936 | /// ::= .cfi_def_cfa_register register |
3937 | bool AsmParser::parseDirectiveCFIDefCfaRegister(SMLoc DirectiveLoc) { |
3938 | int64_t Register = 0; |
3939 | if (parseRegisterOrRegisterNumber(Register, DirectiveLoc)) |
3940 | return true; |
3941 | |
3942 | getStreamer().EmitCFIDefCfaRegister(Register); |
3943 | return false; |
3944 | } |
3945 | |
3946 | /// parseDirectiveCFIOffset |
3947 | /// ::= .cfi_offset register, offset |
3948 | bool AsmParser::parseDirectiveCFIOffset(SMLoc DirectiveLoc) { |
3949 | int64_t Register = 0; |
3950 | int64_t Offset = 0; |
3951 | |
3952 | if (parseRegisterOrRegisterNumber(Register, DirectiveLoc) || |
3953 | parseToken(AsmToken::Comma, "unexpected token in directive") || |
3954 | parseAbsoluteExpression(Offset)) |
3955 | return true; |
3956 | |
3957 | getStreamer().EmitCFIOffset(Register, Offset); |
3958 | return false; |
3959 | } |
3960 | |
3961 | /// parseDirectiveCFIRelOffset |
3962 | /// ::= .cfi_rel_offset register, offset |
3963 | bool AsmParser::parseDirectiveCFIRelOffset(SMLoc DirectiveLoc) { |
3964 | int64_t Register = 0, Offset = 0; |
3965 | |
3966 | if (parseRegisterOrRegisterNumber(Register, DirectiveLoc) || |
3967 | parseToken(AsmToken::Comma, "unexpected token in directive") || |
3968 | parseAbsoluteExpression(Offset)) |
3969 | return true; |
3970 | |
3971 | getStreamer().EmitCFIRelOffset(Register, Offset); |
3972 | return false; |
3973 | } |
3974 | |
3975 | static bool isValidEncoding(int64_t Encoding) { |
3976 | if (Encoding & ~0xff) |
3977 | return false; |
3978 | |
3979 | if (Encoding == dwarf::DW_EH_PE_omit) |
3980 | return true; |
3981 | |
3982 | const unsigned Format = Encoding & 0xf; |
3983 | if (Format != dwarf::DW_EH_PE_absptr && Format != dwarf::DW_EH_PE_udata2 && |
3984 | Format != dwarf::DW_EH_PE_udata4 && Format != dwarf::DW_EH_PE_udata8 && |
3985 | Format != dwarf::DW_EH_PE_sdata2 && Format != dwarf::DW_EH_PE_sdata4 && |
3986 | Format != dwarf::DW_EH_PE_sdata8 && Format != dwarf::DW_EH_PE_signed) |
3987 | return false; |
3988 | |
3989 | const unsigned Application = Encoding & 0x70; |
3990 | if (Application != dwarf::DW_EH_PE_absptr && |
3991 | Application != dwarf::DW_EH_PE_pcrel) |
3992 | return false; |
3993 | |
3994 | return true; |
3995 | } |
3996 | |
3997 | /// parseDirectiveCFIPersonalityOrLsda |
3998 | /// IsPersonality true for cfi_personality, false for cfi_lsda |
3999 | /// ::= .cfi_personality encoding, [symbol_name] |
4000 | /// ::= .cfi_lsda encoding, [symbol_name] |
4001 | bool AsmParser::parseDirectiveCFIPersonalityOrLsda(bool IsPersonality) { |
4002 | int64_t Encoding = 0; |
4003 | if (parseAbsoluteExpression(Encoding)) |
4004 | return true; |
4005 | if (Encoding == dwarf::DW_EH_PE_omit) |
4006 | return false; |
4007 | |
4008 | StringRef Name; |
4009 | if (check(!isValidEncoding(Encoding), "unsupported encoding.") || |
4010 | parseToken(AsmToken::Comma, "unexpected token in directive") || |
4011 | check(parseIdentifier(Name), "expected identifier in directive")) |
4012 | return true; |
4013 | |
4014 | MCSymbol *Sym = getContext().getOrCreateSymbol(Name); |
4015 | |
4016 | if (IsPersonality) |
4017 | getStreamer().EmitCFIPersonality(Sym, Encoding); |
4018 | else |
4019 | getStreamer().EmitCFILsda(Sym, Encoding); |
4020 | return false; |
4021 | } |
4022 | |
4023 | /// parseDirectiveCFIRememberState |
4024 | /// ::= .cfi_remember_state |
4025 | bool AsmParser::parseDirectiveCFIRememberState() { |
4026 | getStreamer().EmitCFIRememberState(); |
4027 | return false; |
4028 | } |
4029 | |
4030 | /// parseDirectiveCFIRestoreState |
4031 | /// ::= .cfi_remember_state |
4032 | bool AsmParser::parseDirectiveCFIRestoreState() { |
4033 | getStreamer().EmitCFIRestoreState(); |
4034 | return false; |
4035 | } |
4036 | |
4037 | /// parseDirectiveCFISameValue |
4038 | /// ::= .cfi_same_value register |
4039 | bool AsmParser::parseDirectiveCFISameValue(SMLoc DirectiveLoc) { |
4040 | int64_t Register = 0; |
4041 | |
4042 | if (parseRegisterOrRegisterNumber(Register, DirectiveLoc)) |
4043 | return true; |
4044 | |
4045 | getStreamer().EmitCFISameValue(Register); |
4046 | return false; |
4047 | } |
4048 | |
4049 | /// parseDirectiveCFIRestore |
4050 | /// ::= .cfi_restore register |
4051 | bool AsmParser::parseDirectiveCFIRestore(SMLoc DirectiveLoc) { |
4052 | int64_t Register = 0; |
4053 | if (parseRegisterOrRegisterNumber(Register, DirectiveLoc)) |
4054 | return true; |
4055 | |
4056 | getStreamer().EmitCFIRestore(Register); |
4057 | return false; |
4058 | } |
4059 | |
4060 | /// parseDirectiveCFIEscape |
4061 | /// ::= .cfi_escape expression[,...] |
4062 | bool AsmParser::parseDirectiveCFIEscape() { |
4063 | std::string Values; |
4064 | int64_t CurrValue; |
4065 | if (parseAbsoluteExpression(CurrValue)) |
4066 | return true; |
4067 | |
4068 | Values.push_back((uint8_t)CurrValue); |
4069 | |
4070 | while (getLexer().is(AsmToken::Comma)) { |
4071 | Lex(); |
4072 | |
4073 | if (parseAbsoluteExpression(CurrValue)) |
4074 | return true; |
4075 | |
4076 | Values.push_back((uint8_t)CurrValue); |
4077 | } |
4078 | |
4079 | getStreamer().EmitCFIEscape(Values); |
4080 | return false; |
4081 | } |
4082 | |
4083 | /// parseDirectiveCFIReturnColumn |
4084 | /// ::= .cfi_return_column register |
4085 | bool AsmParser::parseDirectiveCFIReturnColumn(SMLoc DirectiveLoc) { |
4086 | int64_t Register = 0; |
4087 | if (parseRegisterOrRegisterNumber(Register, DirectiveLoc)) |
4088 | return true; |
4089 | getStreamer().EmitCFIReturnColumn(Register); |
4090 | return false; |
4091 | } |
4092 | |
4093 | /// parseDirectiveCFISignalFrame |
4094 | /// ::= .cfi_signal_frame |
4095 | bool AsmParser::parseDirectiveCFISignalFrame() { |
4096 | if (parseToken(AsmToken::EndOfStatement, |
4097 | "unexpected token in '.cfi_signal_frame'")) |
4098 | return true; |
4099 | |
4100 | getStreamer().EmitCFISignalFrame(); |
4101 | return false; |
4102 | } |
4103 | |
4104 | /// parseDirectiveCFIUndefined |
4105 | /// ::= .cfi_undefined register |
4106 | bool AsmParser::parseDirectiveCFIUndefined(SMLoc DirectiveLoc) { |
4107 | int64_t Register = 0; |
4108 | |
4109 | if (parseRegisterOrRegisterNumber(Register, DirectiveLoc)) |
4110 | return true; |
4111 | |
4112 | getStreamer().EmitCFIUndefined(Register); |
4113 | return false; |
4114 | } |
4115 | |
4116 | /// parseDirectiveAltmacro |
4117 | /// ::= .altmacro |
4118 | /// ::= .noaltmacro |
4119 | bool AsmParser::parseDirectiveAltmacro(StringRef Directive) { |
4120 | if (getLexer().isNot(AsmToken::EndOfStatement)) |
4121 | return TokError("unexpected token in '" + Directive + "' directive"); |
4122 | if (Directive == ".altmacro") |
4123 | getLexer().SetAltMacroMode(true); |
4124 | else |
4125 | getLexer().SetAltMacroMode(false); |
4126 | return false; |
4127 | } |
4128 | |
4129 | /// parseDirectiveMacrosOnOff |
4130 | /// ::= .macros_on |
4131 | /// ::= .macros_off |
4132 | bool AsmParser::parseDirectiveMacrosOnOff(StringRef Directive) { |
4133 | if (parseToken(AsmToken::EndOfStatement, |
4134 | "unexpected token in '" + Directive + "' directive")) |
4135 | return true; |
4136 | |
4137 | setMacrosEnabled(Directive == ".macros_on"); |
4138 | return false; |
4139 | } |
4140 | |
4141 | /// parseDirectiveMacro |
4142 | /// ::= .macro name[,] [parameters] |
4143 | bool AsmParser::parseDirectiveMacro(SMLoc DirectiveLoc) { |
4144 | StringRef Name; |
4145 | if (parseIdentifier(Name)) |
4146 | return TokError("expected identifier in '.macro' directive"); |
4147 | |
4148 | if (getLexer().is(AsmToken::Comma)) |
4149 | Lex(); |
4150 | |
4151 | MCAsmMacroParameters Parameters; |
4152 | while (getLexer().isNot(AsmToken::EndOfStatement)) { |
4153 | |
4154 | if (!Parameters.empty() && Parameters.back().Vararg) |
4155 | return Error(Lexer.getLoc(), |
4156 | "Vararg parameter '" + Parameters.back().Name + |
4157 | "' should be last one in the list of parameters."); |
4158 | |
4159 | MCAsmMacroParameter Parameter; |
4160 | if (parseIdentifier(Parameter.Name)) |
4161 | return TokError("expected identifier in '.macro' directive"); |
4162 | |
4163 | // Emit an error if two (or more) named parameters share the same name |
4164 | for (const MCAsmMacroParameter& CurrParam : Parameters) |
4165 | if (CurrParam.Name.equals(Parameter.Name)) |
4166 | return TokError("macro '" + Name + "' has multiple parameters" |
4167 | " named '" + Parameter.Name + "'"); |
4168 | |
4169 | if (Lexer.is(AsmToken::Colon)) { |
4170 | Lex(); // consume ':' |
4171 | |
4172 | SMLoc QualLoc; |
4173 | StringRef Qualifier; |
4174 | |
4175 | QualLoc = Lexer.getLoc(); |
4176 | if (parseIdentifier(Qualifier)) |
4177 | return Error(QualLoc, "missing parameter qualifier for " |
4178 | "'" + Parameter.Name + "' in macro '" + Name + "'"); |
4179 | |
4180 | if (Qualifier == "req") |
4181 | Parameter.Required = true; |
4182 | else if (Qualifier == "vararg") |
4183 | Parameter.Vararg = true; |
4184 | else |
4185 | return Error(QualLoc, Qualifier + " is not a valid parameter qualifier " |
4186 | "for '" + Parameter.Name + "' in macro '" + Name + "'"); |
4187 | } |
4188 | |
4189 | if (getLexer().is(AsmToken::Equal)) { |
4190 | Lex(); |
4191 | |
4192 | SMLoc ParamLoc; |
4193 | |
4194 | ParamLoc = Lexer.getLoc(); |
4195 | if (parseMacroArgument(Parameter.Value, /*Vararg=*/false )) |
4196 | return true; |
4197 | |
4198 | if (Parameter.Required) |
4199 | Warning(ParamLoc, "pointless default value for required parameter " |
4200 | "'" + Parameter.Name + "' in macro '" + Name + "'"); |
4201 | } |
4202 | |
4203 | Parameters.push_back(std::move(Parameter)); |
4204 | |
4205 | if (getLexer().is(AsmToken::Comma)) |
4206 | Lex(); |
4207 | } |
4208 | |
4209 | // Eat just the end of statement. |
4210 | Lexer.Lex(); |
4211 | |
4212 | // Consuming deferred text, so use Lexer.Lex to ignore Lexing Errors |
4213 | AsmToken EndToken, StartToken = getTok(); |
4214 | unsigned MacroDepth = 0; |
4215 | // Lex the macro definition. |
4216 | while (true) { |
4217 | // Ignore Lexing errors in macros. |
4218 | while (Lexer.is(AsmToken::Error)) { |
4219 | Lexer.Lex(); |
4220 | } |
4221 | |
4222 | // Check whether we have reached the end of the file. |
4223 | if (getLexer().is(AsmToken::Eof)) |
4224 | return Error(DirectiveLoc, "no matching '.endmacro' in definition"); |
4225 | |
4226 | // Otherwise, check whether we have reach the .endmacro. |
4227 | if (getLexer().is(AsmToken::Identifier)) { |
4228 | if (getTok().getIdentifier() == ".endm" || |
4229 | getTok().getIdentifier() == ".endmacro") { |
4230 | if (MacroDepth == 0) { // Outermost macro. |
4231 | EndToken = getTok(); |
4232 | Lexer.Lex(); |
4233 | if (getLexer().isNot(AsmToken::EndOfStatement)) |
4234 | return TokError("unexpected token in '" + EndToken.getIdentifier() + |
4235 | "' directive"); |
4236 | break; |
4237 | } else { |
4238 | // Otherwise we just found the end of an inner macro. |
4239 | --MacroDepth; |
4240 | } |
4241 | } else if (getTok().getIdentifier() == ".macro") { |
4242 | // We allow nested macros. Those aren't instantiated until the outermost |
4243 | // macro is expanded so just ignore them for now. |
4244 | ++MacroDepth; |
4245 | } |
4246 | } |
4247 | |
4248 | // Otherwise, scan til the end of the statement. |
4249 | eatToEndOfStatement(); |
4250 | } |
4251 | |
4252 | if (getContext().lookupMacro(Name)) { |
4253 | return Error(DirectiveLoc, "macro '" + Name + "' is already defined"); |
4254 | } |
4255 | |
4256 | const char *BodyStart = StartToken.getLoc().getPointer(); |
4257 | const char *BodyEnd = EndToken.getLoc().getPointer(); |
4258 | StringRef Body = StringRef(BodyStart, BodyEnd - BodyStart); |
4259 | checkForBadMacro(DirectiveLoc, Name, Body, Parameters); |
4260 | getContext().defineMacro(Name, MCAsmMacro(Name, Body, std::move(Parameters))); |
4261 | return false; |
4262 | } |
4263 | |
4264 | /// checkForBadMacro |
4265 | /// |
4266 | /// With the support added for named parameters there may be code out there that |
4267 | /// is transitioning from positional parameters. In versions of gas that did |
4268 | /// not support named parameters they would be ignored on the macro definition. |
4269 | /// But to support both styles of parameters this is not possible so if a macro |
4270 | /// definition has named parameters but does not use them and has what appears |
4271 | /// to be positional parameters, strings like $1, $2, ... and $n, then issue a |
4272 | /// warning that the positional parameter found in body which have no effect. |
4273 | /// Hoping the developer will either remove the named parameters from the macro |
4274 | /// definition so the positional parameters get used if that was what was |
4275 | /// intended or change the macro to use the named parameters. It is possible |
4276 | /// this warning will trigger when the none of the named parameters are used |
4277 | /// and the strings like $1 are infact to simply to be passed trough unchanged. |
4278 | void AsmParser::checkForBadMacro(SMLoc DirectiveLoc, StringRef Name, |
4279 | StringRef Body, |
4280 | ArrayRef<MCAsmMacroParameter> Parameters) { |
4281 | // If this macro is not defined with named parameters the warning we are |
4282 | // checking for here doesn't apply. |
4283 | unsigned NParameters = Parameters.size(); |
4284 | if (NParameters == 0) |
4285 | return; |
4286 | |
4287 | bool NamedParametersFound = false; |
4288 | bool PositionalParametersFound = false; |
4289 | |
4290 | // Look at the body of the macro for use of both the named parameters and what |
4291 | // are likely to be positional parameters. This is what expandMacro() is |
4292 | // doing when it finds the parameters in the body. |
4293 | while (!Body.empty()) { |
4294 | // Scan for the next possible parameter. |
4295 | std::size_t End = Body.size(), Pos = 0; |
4296 | for (; Pos != End; ++Pos) { |
4297 | // Check for a substitution or escape. |
4298 | // This macro is defined with parameters, look for \foo, \bar, etc. |
4299 | if (Body[Pos] == '\\' && Pos + 1 != End) |
4300 | break; |
4301 | |
4302 | // This macro should have parameters, but look for $0, $1, ..., $n too. |
4303 | if (Body[Pos] != '$' || Pos + 1 == End) |
4304 | continue; |
4305 | char Next = Body[Pos + 1]; |
4306 | if (Next == '$' || Next == 'n' || |
4307 | isdigit(static_cast<unsigned char>(Next))) |
4308 | break; |
4309 | } |
4310 | |
4311 | // Check if we reached the end. |
4312 | if (Pos == End) |
4313 | break; |
4314 | |
4315 | if (Body[Pos] == '$') { |
4316 | switch (Body[Pos + 1]) { |
4317 | // $$ => $ |
4318 | case '$': |
4319 | break; |
4320 | |
4321 | // $n => number of arguments |
4322 | case 'n': |
4323 | PositionalParametersFound = true; |
4324 | break; |
4325 | |
4326 | // $[0-9] => argument |
4327 | default: { |
4328 | PositionalParametersFound = true; |
4329 | break; |
4330 | } |
4331 | } |
4332 | Pos += 2; |
4333 | } else { |
4334 | unsigned I = Pos + 1; |
4335 | while (isIdentifierChar(Body[I]) && I + 1 != End) |
4336 | ++I; |
4337 | |
4338 | const char *Begin = Body.data() + Pos + 1; |
4339 | StringRef Argument(Begin, I - (Pos + 1)); |
4340 | unsigned Index = 0; |
4341 | for (; Index < NParameters; ++Index) |
4342 | if (Parameters[Index].Name == Argument) |
4343 | break; |
4344 | |
4345 | if (Index == NParameters) { |
4346 | if (Body[Pos + 1] == '(' && Body[Pos + 2] == ')') |
4347 | Pos += 3; |
4348 | else { |
4349 | Pos = I; |
4350 | } |
4351 | } else { |
4352 | NamedParametersFound = true; |
4353 | Pos += 1 + Argument.size(); |
4354 | } |
4355 | } |
4356 | // Update the scan point. |
4357 | Body = Body.substr(Pos); |
4358 | } |
4359 | |
4360 | if (!NamedParametersFound && PositionalParametersFound) |
4361 | Warning(DirectiveLoc, "macro defined with named parameters which are not " |
4362 | "used in macro body, possible positional parameter " |
4363 | "found in body which will have no effect"); |
4364 | } |
4365 | |
4366 | /// parseDirectiveExitMacro |
4367 | /// ::= .exitm |
4368 | bool AsmParser::parseDirectiveExitMacro(StringRef Directive) { |
4369 | if (parseToken(AsmToken::EndOfStatement, |
4370 | "unexpected token in '" + Directive + "' directive")) |
4371 | return true; |
4372 | |
4373 | if (!isInsideMacroInstantiation()) |
4374 | return TokError("unexpected '" + Directive + "' in file, " |
4375 | "no current macro definition"); |
4376 | |
4377 | // Exit all conditionals that are active in the current macro. |
4378 | while (TheCondStack.size() != ActiveMacros.back()->CondStackDepth) { |
4379 | TheCondState = TheCondStack.back(); |
4380 | TheCondStack.pop_back(); |
4381 | } |
4382 | |
4383 | handleMacroExit(); |
4384 | return false; |
4385 | } |
4386 | |
4387 | /// parseDirectiveEndMacro |
4388 | /// ::= .endm |
4389 | /// ::= .endmacro |
4390 | bool AsmParser::parseDirectiveEndMacro(StringRef Directive) { |
4391 | if (getLexer().isNot(AsmToken::EndOfStatement)) |
4392 | return TokError("unexpected token in '" + Directive + "' directive"); |
4393 | |
4394 | // If we are inside a macro instantiation, terminate the current |
4395 | // instantiation. |
4396 | if (isInsideMacroInstantiation()) { |
4397 | handleMacroExit(); |
4398 | return false; |
4399 | } |
4400 | |
4401 | // Otherwise, this .endmacro is a stray entry in the file; well formed |
4402 | // .endmacro directives are handled during the macro definition parsing. |
4403 | return TokError("unexpected '" + Directive + "' in file, " |
4404 | "no current macro definition"); |
4405 | } |
4406 | |
4407 | /// parseDirectivePurgeMacro |
4408 | /// ::= .purgem |
4409 | bool AsmParser::parseDirectivePurgeMacro(SMLoc DirectiveLoc) { |
4410 | StringRef Name; |
4411 | SMLoc Loc; |
4412 | if (parseTokenLoc(Loc) || |
4413 | check(parseIdentifier(Name), Loc, |
4414 | "expected identifier in '.purgem' directive") || |
4415 | parseToken(AsmToken::EndOfStatement, |
4416 | "unexpected token in '.purgem' directive")) |
4417 | return true; |
4418 | |
4419 | if (!getContext().lookupMacro(Name)) |
4420 | return Error(DirectiveLoc, "macro '" + Name + "' is not defined"); |
4421 | |
4422 | getContext().undefineMacro(Name); |
4423 | return false; |
4424 | } |
4425 | |
4426 | /// parseDirectiveBundleAlignMode |
4427 | /// ::= {.bundle_align_mode} expression |
4428 | bool AsmParser::parseDirectiveBundleAlignMode() { |
4429 | // Expect a single argument: an expression that evaluates to a constant |
4430 | // in the inclusive range 0-30. |
4431 | SMLoc ExprLoc = getLexer().getLoc(); |
4432 | int64_t AlignSizePow2; |
4433 | if (checkForValidSection() || parseAbsoluteExpression(AlignSizePow2) || |
4434 | parseToken(AsmToken::EndOfStatement, "unexpected token after expression " |
4435 | "in '.bundle_align_mode' " |
4436 | "directive") || |
4437 | check(AlignSizePow2 < 0 || AlignSizePow2 > 30, ExprLoc, |
4438 | "invalid bundle alignment size (expected between 0 and 30)")) |
4439 | return true; |
4440 | |
4441 | // Because of AlignSizePow2's verified range we can safely truncate it to |
4442 | // unsigned. |
4443 | getStreamer().EmitBundleAlignMode(static_cast<unsigned>(AlignSizePow2)); |
4444 | return false; |
4445 | } |
4446 | |
4447 | /// parseDirectiveBundleLock |
4448 | /// ::= {.bundle_lock} [align_to_end] |
4449 | bool AsmParser::parseDirectiveBundleLock() { |
4450 | if (checkForValidSection()) |
4451 | return true; |
4452 | bool AlignToEnd = false; |
4453 | |
4454 | StringRef Option; |
4455 | SMLoc Loc = getTok().getLoc(); |
4456 | const char *kInvalidOptionError = |
4457 | "invalid option for '.bundle_lock' directive"; |
4458 | |
4459 | if (!parseOptionalToken(AsmToken::EndOfStatement)) { |
4460 | if (check(parseIdentifier(Option), Loc, kInvalidOptionError) || |
4461 | check(Option != "align_to_end", Loc, kInvalidOptionError) || |
4462 | parseToken(AsmToken::EndOfStatement, |
4463 | "unexpected token after '.bundle_lock' directive option")) |
4464 | return true; |
4465 | AlignToEnd = true; |
4466 | } |
4467 | |
4468 | getStreamer().EmitBundleLock(AlignToEnd); |
4469 | return false; |
4470 | } |
4471 | |
4472 | /// parseDirectiveBundleLock |
4473 | /// ::= {.bundle_lock} |
4474 | bool AsmParser::parseDirectiveBundleUnlock() { |
4475 | if (checkForValidSection() || |
4476 | parseToken(AsmToken::EndOfStatement, |
4477 | "unexpected token in '.bundle_unlock' directive")) |
4478 | return true; |
4479 | |
4480 | getStreamer().EmitBundleUnlock(); |
4481 | return false; |
4482 | } |
4483 | |
4484 | /// parseDirectiveSpace |
4485 | /// ::= (.skip | .space) expression [ , expression ] |
4486 | bool AsmParser::parseDirectiveSpace(StringRef IDVal) { |
4487 | SMLoc NumBytesLoc = Lexer.getLoc(); |
4488 | const MCExpr *NumBytes; |
4489 | if (checkForValidSection() || parseExpression(NumBytes)) |
4490 | return true; |
4491 | |
4492 | int64_t FillExpr = 0; |
4493 | if (parseOptionalToken(AsmToken::Comma)) |
4494 | if (parseAbsoluteExpression(FillExpr)) |
4495 | return addErrorSuffix("in '" + Twine(IDVal) + "' directive"); |
4496 | if (parseToken(AsmToken::EndOfStatement)) |
4497 | return addErrorSuffix("in '" + Twine(IDVal) + "' directive"); |
4498 | |
4499 | // FIXME: Sometimes the fill expr is 'nop' if it isn't supplied, instead of 0. |
4500 | getStreamer().emitFill(*NumBytes, FillExpr, NumBytesLoc); |
4501 | |
4502 | return false; |
4503 | } |
4504 | |
4505 | /// parseDirectiveDCB |
4506 | /// ::= .dcb.{b, l, w} expression, expression |
4507 | bool AsmParser::parseDirectiveDCB(StringRef IDVal, unsigned Size) { |
4508 | SMLoc NumValuesLoc = Lexer.getLoc(); |
4509 | int64_t NumValues; |
4510 | if (checkForValidSection() || parseAbsoluteExpression(NumValues)) |
4511 | return true; |
4512 | |
4513 | if (NumValues < 0) { |
4514 | Warning(NumValuesLoc, "'" + Twine(IDVal) + "' directive with negative repeat count has no effect"); |
4515 | return false; |
4516 | } |
4517 | |
4518 | if (parseToken(AsmToken::Comma, |
4519 | "unexpected token in '" + Twine(IDVal) + "' directive")) |
4520 | return true; |
4521 | |
4522 | const MCExpr *Value; |
4523 | SMLoc ExprLoc = getLexer().getLoc(); |
4524 | if (parseExpression(Value)) |
4525 | return true; |
4526 | |
4527 | // Special case constant expressions to match code generator. |
4528 | if (const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Value)) { |
4529 | assert(Size <= 8 && "Invalid size")(static_cast <bool> (Size <= 8 && "Invalid size" ) ? void (0) : __assert_fail ("Size <= 8 && \"Invalid size\"" , "/build/llvm-toolchain-snapshot-7~svn326551/lib/MC/MCParser/AsmParser.cpp" , 4529, __extension__ __PRETTY_FUNCTION__)); |
4530 | uint64_t IntValue = MCE->getValue(); |
4531 | if (!isUIntN(8 * Size, IntValue) && !isIntN(8 * Size, IntValue)) |
4532 | return Error(ExprLoc, "literal value out of range for directive"); |
4533 | for (uint64_t i = 0, e = NumValues; i != e; ++i) |
4534 | getStreamer().EmitIntValue(IntValue, Size); |
4535 | } else { |
4536 | for (uint64_t i = 0, e = NumValues; i != e; ++i) |
4537 | getStreamer().EmitValue(Value, Size, ExprLoc); |
4538 | } |
4539 | |
4540 | if (parseToken(AsmToken::EndOfStatement, |
4541 | "unexpected token in '" + Twine(IDVal) + "' directive")) |
4542 | return true; |
4543 | |
4544 | return false; |
4545 | } |
4546 | |
4547 | /// parseDirectiveRealDCB |
4548 | /// ::= .dcb.{d, s} expression, expression |
4549 | bool AsmParser::parseDirectiveRealDCB(StringRef IDVal, const fltSemantics &Semantics) { |
4550 | SMLoc NumValuesLoc = Lexer.getLoc(); |
4551 | int64_t NumValues; |
4552 | if (checkForValidSection() || parseAbsoluteExpression(NumValues)) |
4553 | return true; |
4554 | |
4555 | if (NumValues < 0) { |
4556 | Warning(NumValuesLoc, "'" + Twine(IDVal) + "' directive with negative repeat count has no effect"); |
4557 | return false; |
4558 | } |
4559 | |
4560 | if (parseToken(AsmToken::Comma, |
4561 | "unexpected token in '" + Twine(IDVal) + "' directive")) |
4562 | return true; |
4563 | |
4564 | APInt AsInt; |
4565 | if (parseRealValue(Semantics, AsInt)) |
4566 | return true; |
4567 | |
4568 | if (parseToken(AsmToken::EndOfStatement, |
4569 | "unexpected token in '" + Twine(IDVal) + "' directive")) |
4570 | return true; |
4571 | |
4572 | for (uint64_t i = 0, e = NumValues; i != e; ++i) |
4573 | getStreamer().EmitIntValue(AsInt.getLimitedValue(), |
4574 | AsInt.getBitWidth() / 8); |
4575 | |
4576 | return false; |
4577 | } |
4578 | |
4579 | /// parseDirectiveDS |
4580 | /// ::= .ds.{b, d, l, p, s, w, x} expression |
4581 | bool AsmParser::parseDirectiveDS(StringRef IDVal, unsigned Size) { |
4582 | SMLoc NumValuesLoc = Lexer.getLoc(); |
4583 | int64_t NumValues; |
4584 | if (checkForValidSection() || parseAbsoluteExpression(NumValues)) |
4585 | return true; |
4586 | |
4587 | if (NumValues < 0) { |
4588 | Warning(NumValuesLoc, "'" + Twine(IDVal) + "' directive with negative repeat count has no effect"); |
4589 | return false; |
4590 | } |
4591 | |
4592 | if (parseToken(AsmToken::EndOfStatement, |
4593 | "unexpected token in '" + Twine(IDVal) + "' directive")) |
4594 | return true; |
4595 | |
4596 | for (uint64_t i = 0, e = NumValues; i != e; ++i) |
4597 | getStreamer().emitFill(Size, 0); |
4598 | |
4599 | return false; |
4600 | } |
4601 | |
4602 | /// parseDirectiveLEB128 |
4603 | /// ::= (.sleb128 | .uleb128) [ expression (, expression)* ] |
4604 | bool AsmParser::parseDirectiveLEB128(bool Signed) { |
4605 | if (checkForValidSection()) |
4606 | return true; |
4607 | |
4608 | auto parseOp = [&]() -> bool { |
4609 | const MCExpr *Value; |
4610 | if (parseExpression(Value)) |
4611 | return true; |
4612 | if (Signed) |
4613 | getStreamer().EmitSLEB128Value(Value); |
4614 | else |
4615 | getStreamer().EmitULEB128Value(Value); |
4616 | return false; |
4617 | }; |
4618 | |
4619 | if (parseMany(parseOp)) |
4620 | return addErrorSuffix(" in directive"); |
4621 | |
4622 | return false; |
4623 | } |
4624 | |
4625 | /// parseDirectiveSymbolAttribute |
4626 | /// ::= { ".globl", ".weak", ... } [ identifier ( , identifier )* ] |
4627 | bool AsmParser::parseDirectiveSymbolAttribute(MCSymbolAttr Attr) { |
4628 | auto parseOp = [&]() -> bool { |
4629 | StringRef Name; |
4630 | SMLoc Loc = getTok().getLoc(); |
4631 | if (parseIdentifier(Name)) |
4632 | return Error(Loc, "expected identifier"); |
4633 | MCSymbol *Sym = getContext().getOrCreateSymbol(Name); |
4634 | |
4635 | // Assembler local symbols don't make any sense here. Complain loudly. |
4636 | if (Sym->isTemporary()) |
4637 | return Error(Loc, "non-local symbol required"); |
4638 | |
4639 | if (!getStreamer().EmitSymbolAttribute(Sym, Attr)) |
4640 | return Error(Loc, "unable to emit symbol attribute"); |
4641 | return false; |
4642 | }; |
4643 | |
4644 | if (parseMany(parseOp)) |
4645 | return addErrorSuffix(" in directive"); |
4646 | return false; |
4647 | } |
4648 | |
4649 | /// parseDirectiveComm |
4650 | /// ::= ( .comm | .lcomm ) identifier , size_expression [ , align_expression ] |
4651 | bool AsmParser::parseDirectiveComm(bool IsLocal) { |
4652 | if (checkForValidSection()) |
4653 | return true; |
4654 | |
4655 | SMLoc IDLoc = getLexer().getLoc(); |
4656 | StringRef Name; |
4657 | if (parseIdentifier(Name)) |
4658 | return TokError("expected identifier in directive"); |
4659 | |
4660 | // Handle the identifier as the key symbol. |
4661 | MCSymbol *Sym = getContext().getOrCreateSymbol(Name); |
4662 | |
4663 | if (getLexer().isNot(AsmToken::Comma)) |
4664 | return TokError("unexpected token in directive"); |
4665 | Lex(); |
4666 | |
4667 | int64_t Size; |
4668 | SMLoc SizeLoc = getLexer().getLoc(); |
4669 | if (parseAbsoluteExpression(Size)) |
4670 | return true; |
4671 | |
4672 | int64_t Pow2Alignment = 0; |
4673 | SMLoc Pow2AlignmentLoc; |
4674 | if (getLexer().is(AsmToken::Comma)) { |
4675 | Lex(); |
4676 | Pow2AlignmentLoc = getLexer().getLoc(); |
4677 | if (parseAbsoluteExpression(Pow2Alignment)) |
4678 | return true; |
4679 | |
4680 | LCOMM::LCOMMType LCOMM = Lexer.getMAI().getLCOMMDirectiveAlignmentType(); |
4681 | if (IsLocal && LCOMM == LCOMM::NoAlignment) |
4682 | return Error(Pow2AlignmentLoc, "alignment not supported on this target"); |
4683 | |
4684 | // If this target takes alignments in bytes (not log) validate and convert. |
4685 | if ((!IsLocal && Lexer.getMAI().getCOMMDirectiveAlignmentIsInBytes()) || |
4686 | (IsLocal && LCOMM == LCOMM::ByteAlignment)) { |
4687 | if (!isPowerOf2_64(Pow2Alignment)) |
4688 | return Error(Pow2AlignmentLoc, "alignment must be a power of 2"); |
4689 | Pow2Alignment = Log2_64(Pow2Alignment); |
4690 | } |
4691 | } |
4692 | |
4693 | if (parseToken(AsmToken::EndOfStatement, |
4694 | "unexpected token in '.comm' or '.lcomm' directive")) |
4695 | return true; |
4696 | |
4697 | // NOTE: a size of zero for a .comm should create a undefined symbol |
4698 | // but a size of .lcomm creates a bss symbol of size zero. |
4699 | if (Size < 0) |
4700 | return Error(SizeLoc, "invalid '.comm' or '.lcomm' directive size, can't " |
4701 | "be less than zero"); |
4702 | |
4703 | // NOTE: The alignment in the directive is a power of 2 value, the assembler |
4704 | // may internally end up wanting an alignment in bytes. |
4705 | // FIXME: Diagnose overflow. |
4706 | if (Pow2Alignment < 0) |
4707 | return Error(Pow2AlignmentLoc, "invalid '.comm' or '.lcomm' directive " |
4708 | "alignment, can't be less than zero"); |
4709 | |
4710 | Sym->redefineIfPossible(); |
4711 | if (!Sym->isUndefined()) |
4712 | return Error(IDLoc, "invalid symbol redefinition"); |
4713 | |
4714 | // Create the Symbol as a common or local common with Size and Pow2Alignment |
4715 | if (IsLocal) { |
4716 | getStreamer().EmitLocalCommonSymbol(Sym, Size, 1 << Pow2Alignment); |
4717 | return false; |
4718 | } |
4719 | |
4720 | getStreamer().EmitCommonSymbol(Sym, Size, 1 << Pow2Alignment); |
4721 | return false; |
4722 | } |
4723 | |
4724 | /// parseDirectiveAbort |
4725 | /// ::= .abort [... message ...] |
4726 | bool AsmParser::parseDirectiveAbort() { |
4727 | // FIXME: Use loc from directive. |
4728 | SMLoc Loc = getLexer().getLoc(); |
4729 | |
4730 | StringRef Str = parseStringToEndOfStatement(); |
4731 | if (parseToken(AsmToken::EndOfStatement, |
4732 | "unexpected token in '.abort' directive")) |
4733 | return true; |
4734 | |
4735 | if (Str.empty()) |
4736 | return Error(Loc, ".abort detected. Assembly stopping."); |
4737 | else |
4738 | return Error(Loc, ".abort '" + Str + "' detected. Assembly stopping."); |
4739 | // FIXME: Actually abort assembly here. |
4740 | |
4741 | return false; |
4742 | } |
4743 | |
4744 | /// parseDirectiveInclude |
4745 | /// ::= .include "filename" |
4746 | bool AsmParser::parseDirectiveInclude() { |
4747 | // Allow the strings to have escaped octal character sequence. |
4748 | std::string Filename; |
4749 | SMLoc IncludeLoc = getTok().getLoc(); |
4750 | |
4751 | if (check(getTok().isNot(AsmToken::String), |
4752 | "expected string in '.include' directive") || |
4753 | parseEscapedString(Filename) || |
4754 | check(getTok().isNot(AsmToken::EndOfStatement), |
4755 | "unexpected token in '.include' directive") || |
4756 | // Attempt to switch the lexer to the included file before consuming the |
4757 | // end of statement to avoid losing it when we switch. |
4758 | check(enterIncludeFile(Filename), IncludeLoc, |
4759 | "Could not find include file '" + Filename + "'")) |
4760 | return true; |
4761 | |
4762 | return false; |
4763 | } |
4764 | |
4765 | /// parseDirectiveIncbin |
4766 | /// ::= .incbin "filename" [ , skip [ , count ] ] |
4767 | bool AsmParser::parseDirectiveIncbin() { |
4768 | // Allow the strings to have escaped octal character sequence. |
4769 | std::string Filename; |
4770 | SMLoc IncbinLoc = getTok().getLoc(); |
4771 | if (check(getTok().isNot(AsmToken::String), |
4772 | "expected string in '.incbin' directive") || |
4773 | parseEscapedString(Filename)) |
4774 | return true; |
4775 | |
4776 | int64_t Skip = 0; |
4777 | const MCExpr *Count = nullptr; |
4778 | SMLoc SkipLoc, CountLoc; |
4779 | if (parseOptionalToken(AsmToken::Comma)) { |
4780 | // The skip expression can be omitted while specifying the count, e.g: |
4781 | // .incbin "filename",,4 |
4782 | if (getTok().isNot(AsmToken::Comma)) { |
4783 | if (parseTokenLoc(SkipLoc) || parseAbsoluteExpression(Skip)) |
4784 | return true; |
4785 | } |
4786 | if (parseOptionalToken(AsmToken::Comma)) { |
4787 | CountLoc = getTok().getLoc(); |
4788 | if (parseExpression(Count)) |
4789 | return true; |
4790 | } |
4791 | } |
4792 | |
4793 | if (parseToken(AsmToken::EndOfStatement, |
4794 | "unexpected token in '.incbin' directive")) |
4795 | return true; |
4796 | |
4797 | if (check(Skip < 0, SkipLoc, "skip is negative")) |
4798 | return true; |
4799 | |
4800 | // Attempt to process the included file. |
4801 | if (processIncbinFile(Filename, Skip, Count, CountLoc)) |
4802 | return Error(IncbinLoc, "Could not find incbin file '" + Filename + "'"); |
4803 | return false; |
4804 | } |
4805 | |
4806 | /// parseDirectiveIf |
4807 | /// ::= .if{,eq,ge,gt,le,lt,ne} expression |
4808 | bool AsmParser::parseDirectiveIf(SMLoc DirectiveLoc, DirectiveKind DirKind) { |
4809 | TheCondStack.push_back(TheCondState); |
4810 | TheCondState.TheCond = AsmCond::IfCond; |
4811 | if (TheCondState.Ignore) { |
4812 | eatToEndOfStatement(); |
4813 | } else { |
4814 | int64_t ExprValue; |
4815 | if (parseAbsoluteExpression(ExprValue) || |
4816 | parseToken(AsmToken::EndOfStatement, |
4817 | "unexpected token in '.if' directive")) |
4818 | return true; |
4819 | |
4820 | switch (DirKind) { |
4821 | default: |
4822 | llvm_unreachable("unsupported directive")::llvm::llvm_unreachable_internal("unsupported directive", "/build/llvm-toolchain-snapshot-7~svn326551/lib/MC/MCParser/AsmParser.cpp" , 4822); |
4823 | case DK_IF: |
4824 | case DK_IFNE: |
4825 | break; |
4826 | case DK_IFEQ: |
4827 | ExprValue = ExprValue == 0; |
4828 | break; |
4829 | case DK_IFGE: |
4830 | ExprValue = ExprValue >= 0; |
4831 | break; |
4832 | case DK_IFGT: |
4833 | ExprValue = ExprValue > 0; |
4834 | break; |
4835 | case DK_IFLE: |
4836 | ExprValue = ExprValue <= 0; |
4837 | break; |
4838 | case DK_IFLT: |
4839 | ExprValue = ExprValue < 0; |
4840 | break; |
4841 | } |
4842 | |
4843 | TheCondState.CondMet = ExprValue; |
4844 | TheCondState.Ignore = !TheCondState.CondMet; |
4845 | } |
4846 | |
4847 | return false; |
4848 | } |
4849 | |
4850 | /// parseDirectiveIfb |
4851 | /// ::= .ifb string |
4852 | bool AsmParser::parseDirectiveIfb(SMLoc DirectiveLoc, bool ExpectBlank) { |
4853 | TheCondStack.push_back(TheCondState); |
4854 | TheCondState.TheCond = AsmCond::IfCond; |
4855 | |
4856 | if (TheCondState.Ignore) { |
4857 | eatToEndOfStatement(); |
4858 | } else { |
4859 | StringRef Str = parseStringToEndOfStatement(); |
4860 | |
4861 | if (parseToken(AsmToken::EndOfStatement, |
4862 | "unexpected token in '.ifb' directive")) |
4863 | return true; |
4864 | |
4865 | TheCondState.CondMet = ExpectBlank == Str.empty(); |
4866 | TheCondState.Ignore = !TheCondState.CondMet; |
4867 | } |
4868 | |
4869 | return false; |
4870 | } |
4871 | |
4872 | /// parseDirectiveIfc |
4873 | /// ::= .ifc string1, string2 |
4874 | /// ::= .ifnc string1, string2 |
4875 | bool AsmParser::parseDirectiveIfc(SMLoc DirectiveLoc, bool ExpectEqual) { |
4876 | TheCondStack.push_back(TheCondState); |
4877 | TheCondState.TheCond = AsmCond::IfCond; |
4878 | |
4879 | if (TheCondState.Ignore) { |
4880 | eatToEndOfStatement(); |
4881 | } else { |
4882 | StringRef Str1 = parseStringToComma(); |
4883 | |
4884 | if (parseToken(AsmToken::Comma, "unexpected token in '.ifc' directive")) |
4885 | return true; |
4886 | |
4887 | StringRef Str2 = parseStringToEndOfStatement(); |
4888 | |
4889 | if (parseToken(AsmToken::EndOfStatement, |
4890 | "unexpected token in '.ifc' directive")) |
4891 | return true; |
4892 | |
4893 | TheCondState.CondMet = ExpectEqual == (Str1.trim() == Str2.trim()); |
4894 | TheCondState.Ignore = !TheCondState.CondMet; |
4895 | } |
4896 | |
4897 | return false; |
4898 | } |
4899 | |
4900 | /// parseDirectiveIfeqs |
4901 | /// ::= .ifeqs string1, string2 |
4902 | bool AsmParser::parseDirectiveIfeqs(SMLoc DirectiveLoc, bool ExpectEqual) { |
4903 | if (Lexer.isNot(AsmToken::String)) { |
4904 | if (ExpectEqual) |
4905 | return TokError("expected string parameter for '.ifeqs' directive"); |
4906 | return TokError("expected string parameter for '.ifnes' directive"); |
4907 | } |
4908 | |
4909 | StringRef String1 = getTok().getStringContents(); |
4910 | Lex(); |
4911 | |
4912 | if (Lexer.isNot(AsmToken::Comma)) { |
4913 | if (ExpectEqual) |
4914 | return TokError( |
4915 | "expected comma after first string for '.ifeqs' directive"); |
4916 | return TokError("expected comma after first string for '.ifnes' directive"); |
4917 | } |
4918 | |
4919 | Lex(); |
4920 | |
4921 | if (Lexer.isNot(AsmToken::String)) { |
4922 | if (ExpectEqual) |
4923 | return TokError("expected string parameter for '.ifeqs' directive"); |
4924 | return TokError("expected string parameter for '.ifnes' directive"); |
4925 | } |
4926 | |
4927 | StringRef String2 = getTok().getStringContents(); |
4928 | Lex(); |
4929 | |
4930 | TheCondStack.push_back(TheCondState); |
4931 | TheCondState.TheCond = AsmCond::IfCond; |
4932 | TheCondState.CondMet = ExpectEqual == (String1 == String2); |
4933 | TheCondState.Ignore = !TheCondState.CondMet; |
4934 | |
4935 | return false; |
4936 | } |
4937 | |
4938 | /// parseDirectiveIfdef |
4939 | /// ::= .ifdef symbol |
4940 | bool AsmParser::parseDirectiveIfdef(SMLoc DirectiveLoc, bool expect_defined) { |
4941 | StringRef Name; |
4942 | TheCondStack.push_back(TheCondState); |
4943 | TheCondState.TheCond = AsmCond::IfCond; |
4944 | |
4945 | if (TheCondState.Ignore) { |
4946 | eatToEndOfStatement(); |
4947 | } else { |
4948 | if (check(parseIdentifier(Name), "expected identifier after '.ifdef'") || |
4949 | parseToken(AsmToken::EndOfStatement, "unexpected token in '.ifdef'")) |
4950 | return true; |
4951 | |
4952 | MCSymbol *Sym = getContext().lookupSymbol(Name); |
4953 | |
4954 | if (expect_defined) |
4955 | TheCondState.CondMet = (Sym && !Sym->isUndefined()); |
4956 | else |
4957 | TheCondState.CondMet = (!Sym || Sym->isUndefined()); |
4958 | TheCondState.Ignore = !TheCondState.CondMet; |
4959 | } |
4960 | |
4961 | return false; |
4962 | } |
4963 | |
4964 | /// parseDirectiveElseIf |
4965 | /// ::= .elseif expression |
4966 | bool AsmParser::parseDirectiveElseIf(SMLoc DirectiveLoc) { |
4967 | if (TheCondState.TheCond != AsmCond::IfCond && |
4968 | TheCondState.TheCond != AsmCond::ElseIfCond) |
4969 | return Error(DirectiveLoc, "Encountered a .elseif that doesn't follow an" |
4970 | " .if or an .elseif"); |
4971 | TheCondState.TheCond = AsmCond::ElseIfCond; |
4972 | |
4973 | bool LastIgnoreState = false; |
4974 | if (!TheCondStack.empty()) |
4975 | LastIgnoreState = TheCondStack.back().Ignore; |
4976 | if (LastIgnoreState || TheCondState.CondMet) { |
4977 | TheCondState.Ignore = true; |
4978 | eatToEndOfStatement(); |
4979 | } else { |
4980 | int64_t ExprValue; |
4981 | if (parseAbsoluteExpression(ExprValue)) |
4982 | return true; |
4983 | |
4984 | if (parseToken(AsmToken::EndOfStatement, |
4985 | "unexpected token in '.elseif' directive")) |
4986 | return true; |
4987 | |
4988 | TheCondState.CondMet = ExprValue; |
4989 | TheCondState.Ignore = !TheCondState.CondMet; |
4990 | } |
4991 | |
4992 | return false; |
4993 | } |
4994 | |
4995 | /// parseDirectiveElse |
4996 | /// ::= .else |
4997 | bool AsmParser::parseDirectiveElse(SMLoc DirectiveLoc) { |
4998 | if (parseToken(AsmToken::EndOfStatement, |
4999 | "unexpected token in '.else' directive")) |
5000 | return true; |
5001 | |
5002 | if (TheCondState.TheCond != AsmCond::IfCond && |
5003 | TheCondState.TheCond != AsmCond::ElseIfCond) |
5004 | return Error(DirectiveLoc, "Encountered a .else that doesn't follow " |
5005 | " an .if or an .elseif"); |
5006 | TheCondState.TheCond = AsmCond::ElseCond; |
5007 | bool LastIgnoreState = false; |
5008 | if (!TheCondStack.empty()) |
5009 | LastIgnoreState = TheCondStack.back().Ignore; |
5010 | if (LastIgnoreState || TheCondState.CondMet) |
5011 | TheCondState.Ignore = true; |
5012 | else |
5013 | TheCondState.Ignore = false; |
5014 | |
5015 | return false; |
5016 | } |
5017 | |
5018 | /// parseDirectiveEnd |
5019 | /// ::= .end |
5020 | bool AsmParser::parseDirectiveEnd(SMLoc DirectiveLoc) { |
5021 | if (parseToken(AsmToken::EndOfStatement, |
5022 | "unexpected token in '.end' directive")) |
5023 | return true; |
5024 | |
5025 | while (Lexer.isNot(AsmToken::Eof)) |
5026 | Lexer.Lex(); |
5027 | |
5028 | return false; |
5029 | } |
5030 | |
5031 | /// parseDirectiveError |
5032 | /// ::= .err |
5033 | /// ::= .error [string] |
5034 | bool AsmParser::parseDirectiveError(SMLoc L, bool WithMessage) { |
5035 | if (!TheCondStack.empty()) { |
5036 | if (TheCondStack.back().Ignore) { |
5037 | eatToEndOfStatement(); |
5038 | return false; |
5039 | } |
5040 | } |
5041 | |
5042 | if (!WithMessage) |
5043 | return Error(L, ".err encountered"); |
5044 | |
5045 | StringRef Message = ".error directive invoked in source file"; |
5046 | if (Lexer.isNot(AsmToken::EndOfStatement)) { |
5047 | if (Lexer.isNot(AsmToken::String)) |
5048 | return TokError(".error argument must be a string"); |
5049 | |
5050 | Message = getTok().getStringContents(); |
5051 | Lex(); |
5052 | } |
5053 | |
5054 | return Error(L, Message); |
5055 | } |
5056 | |
5057 | /// parseDirectiveWarning |
5058 | /// ::= .warning [string] |
5059 | bool AsmParser::parseDirectiveWarning(SMLoc L) { |
5060 | if (!TheCondStack.empty()) { |
5061 | if (TheCondStack.back().Ignore) { |
5062 | eatToEndOfStatement(); |
5063 | return false; |
5064 | } |
5065 | } |
5066 | |
5067 | StringRef Message = ".warning directive invoked in source file"; |
5068 | |
5069 | if (!parseOptionalToken(AsmToken::EndOfStatement)) { |
5070 | if (Lexer.isNot(AsmToken::String)) |
5071 | return TokError(".warning argument must be a string"); |
5072 | |
5073 | Message = getTok().getStringContents(); |
5074 | Lex(); |
5075 | if (parseToken(AsmToken::EndOfStatement, |
5076 | "expected end of statement in '.warning' directive")) |
5077 | return true; |
5078 | } |
5079 | |
5080 | return Warning(L, Message); |
5081 | } |
5082 | |
5083 | /// parseDirectiveEndIf |
5084 | /// ::= .endif |
5085 | bool AsmParser::parseDirectiveEndIf(SMLoc DirectiveLoc) { |
5086 | if (parseToken(AsmToken::EndOfStatement, |
5087 | "unexpected token in '.endif' directive")) |
5088 | return true; |
5089 | |
5090 | if ((TheCondState.TheCond == AsmCond::NoCond) || TheCondStack.empty()) |
5091 | return Error(DirectiveLoc, "Encountered a .endif that doesn't follow " |
5092 | "an .if or .else"); |
5093 | if (!TheCondStack.empty()) { |
5094 | TheCondState = TheCondStack.back(); |
5095 | TheCondStack.pop_back(); |
5096 | } |
5097 | |
5098 | return false; |
5099 | } |
5100 | |
5101 | void AsmParser::initializeDirectiveKindMap() { |
5102 | DirectiveKindMap[".set"] = DK_SET; |
5103 | DirectiveKindMap[".equ"] = DK_EQU; |
5104 | DirectiveKindMap[".equiv"] = DK_EQUIV; |
5105 | DirectiveKindMap[".ascii"] = DK_ASCII; |
5106 | DirectiveKindMap[".asciz"] = DK_ASCIZ; |
5107 | DirectiveKindMap[".string"] = DK_STRING; |
5108 | DirectiveKindMap[".byte"] = DK_BYTE; |
5109 | DirectiveKindMap[".short"] = DK_SHORT; |
5110 | DirectiveKindMap[".value"] = DK_VALUE; |
5111 | DirectiveKindMap[".2byte"] = DK_2BYTE; |
5112 | DirectiveKindMap[".long"] = DK_LONG; |
5113 | DirectiveKindMap[".int"] = DK_INT; |
5114 | DirectiveKindMap[".4byte"] = DK_4BYTE; |
5115 | DirectiveKindMap[".quad"] = DK_QUAD; |
5116 | DirectiveKindMap[".8byte"] = DK_8BYTE; |
5117 | DirectiveKindMap[".octa"] = DK_OCTA; |
5118 | DirectiveKindMap[".single"] = DK_SINGLE; |
5119 | DirectiveKindMap[".float"] = DK_FLOAT; |
5120 | DirectiveKindMap[".double"] = DK_DOUBLE; |
5121 | DirectiveKindMap[".align"] = DK_ALIGN; |
5122 | DirectiveKindMap[".align32"] = DK_ALIGN32; |
5123 | DirectiveKindMap[".balign"] = DK_BALIGN; |
5124 | DirectiveKindMap[".balignw"] = DK_BALIGNW; |
5125 | DirectiveKindMap[".balignl"] = DK_BALIGNL; |
5126 | DirectiveKindMap[".p2align"] = DK_P2ALIGN; |
5127 | DirectiveKindMap[".p2alignw"] = DK_P2ALIGNW; |
5128 | DirectiveKindMap[".p2alignl"] = DK_P2ALIGNL; |
5129 | DirectiveKindMap[".org"] = DK_ORG; |
5130 | DirectiveKindMap[".fill"] = DK_FILL; |
5131 | DirectiveKindMap[".zero"] = DK_ZERO; |
5132 | DirectiveKindMap[".extern"] = DK_EXTERN; |
5133 | DirectiveKindMap[".globl"] = DK_GLOBL; |
5134 | DirectiveKindMap[".global"] = DK_GLOBAL; |
5135 | DirectiveKindMap[".lazy_reference"] = DK_LAZY_REFERENCE; |
5136 | DirectiveKindMap[".no_dead_strip"] = DK_NO_DEAD_STRIP; |
5137 | DirectiveKindMap[".symbol_resolver"] = DK_SYMBOL_RESOLVER; |
5138 | DirectiveKindMap[".private_extern"] = DK_PRIVATE_EXTERN; |
5139 | DirectiveKindMap[".reference"] = DK_REFERENCE; |
5140 | DirectiveKindMap[".weak_definition"] = DK_WEAK_DEFINITION; |
5141 | DirectiveKindMap[".weak_reference"] = DK_WEAK_REFERENCE; |
5142 | DirectiveKindMap[".weak_def_can_be_hidden"] = DK_WEAK_DEF_CAN_BE_HIDDEN; |
5143 | DirectiveKindMap[".comm"] = DK_COMM; |
5144 | DirectiveKindMap[".common"] = DK_COMMON; |
5145 | DirectiveKindMap[".lcomm"] = DK_LCOMM; |
5146 | DirectiveKindMap[".abort"] = DK_ABORT; |
5147 | DirectiveKindMap[".include"] = DK_INCLUDE; |
5148 | DirectiveKindMap[".incbin"] = DK_INCBIN; |
5149 | DirectiveKindMap[".code16"] = DK_CODE16; |
5150 | DirectiveKindMap[".code16gcc"] = DK_CODE16GCC; |
5151 | DirectiveKindMap[".rept"] = DK_REPT; |
5152 | DirectiveKindMap[".rep"] = DK_REPT; |
5153 | DirectiveKindMap[".irp"] = DK_IRP; |
5154 | DirectiveKindMap[".irpc"] = DK_IRPC; |
5155 | DirectiveKindMap[".endr"] = DK_ENDR; |
5156 | DirectiveKindMap[".bundle_align_mode"] = DK_BUNDLE_ALIGN_MODE; |
5157 | DirectiveKindMap[".bundle_lock"] = DK_BUNDLE_LOCK; |
5158 | DirectiveKindMap[".bundle_unlock"] = DK_BUNDLE_UNLOCK; |
5159 | DirectiveKindMap[".if"] = DK_IF; |
5160 | DirectiveKindMap[".ifeq"] = DK_IFEQ; |
5161 | DirectiveKindMap[".ifge"] = DK_IFGE; |
5162 | DirectiveKindMap[".ifgt"] = DK_IFGT; |
5163 | DirectiveKindMap[".ifle"] = DK_IFLE; |
5164 | DirectiveKindMap[".iflt"] = DK_IFLT; |
5165 | DirectiveKindMap[".ifne"] = DK_IFNE; |
5166 | DirectiveKindMap[".ifb"] = DK_IFB; |
5167 | DirectiveKindMap[".ifnb"] = DK_IFNB; |
5168 | DirectiveKindMap[".ifc"] = DK_IFC; |
5169 | DirectiveKindMap[".ifeqs"] = DK_IFEQS; |
5170 | DirectiveKindMap[".ifnc"] = DK_IFNC; |
5171 | DirectiveKindMap[".ifnes"] = DK_IFNES; |
5172 | DirectiveKindMap[".ifdef"] = DK_IFDEF; |
5173 | DirectiveKindMap[".ifndef"] = DK_IFNDEF; |
5174 | DirectiveKindMap[".ifnotdef"] = DK_IFNOTDEF; |
5175 | DirectiveKindMap[".elseif"] = DK_ELSEIF; |
5176 | DirectiveKindMap[".else"] = DK_ELSE; |
5177 | DirectiveKindMap[".end"] = DK_END; |
5178 | DirectiveKindMap[".endif"] = DK_ENDIF; |
5179 | DirectiveKindMap[".skip"] = DK_SKIP; |
5180 | DirectiveKindMap[".space"] = DK_SPACE; |
5181 | DirectiveKindMap[".file"] = DK_FILE; |
5182 | DirectiveKindMap[".line"] = DK_LINE; |
5183 | DirectiveKindMap[".loc"] = DK_LOC; |
5184 | DirectiveKindMap[".stabs"] = DK_STABS; |
5185 | DirectiveKindMap[".cv_file"] = DK_CV_FILE; |
5186 | DirectiveKindMap[".cv_func_id"] = DK_CV_FUNC_ID; |
5187 | DirectiveKindMap[".cv_loc"] = DK_CV_LOC; |
5188 | DirectiveKindMap[".cv_linetable"] = DK_CV_LINETABLE; |
5189 | DirectiveKindMap[".cv_inline_linetable"] = DK_CV_INLINE_LINETABLE; |
5190 | DirectiveKindMap[".cv_inline_site_id"] = DK_CV_INLINE_SITE_ID; |
5191 | DirectiveKindMap[".cv_def_range"] = DK_CV_DEF_RANGE; |
5192 | DirectiveKindMap[".cv_stringtable"] = DK_CV_STRINGTABLE; |
5193 | DirectiveKindMap[".cv_filechecksums"] = DK_CV_FILECHECKSUMS; |
5194 | DirectiveKindMap[".cv_filechecksumoffset"] = DK_CV_FILECHECKSUM_OFFSET; |
5195 | DirectiveKindMap[".cv_fpo_data"] = DK_CV_FPO_DATA; |
5196 | DirectiveKindMap[".sleb128"] = DK_SLEB128; |
5197 | DirectiveKindMap[".uleb128"] = DK_ULEB128; |
5198 | DirectiveKindMap[".cfi_sections"] = DK_CFI_SECTIONS; |
5199 | DirectiveKindMap[".cfi_startproc"] = DK_CFI_STARTPROC; |
5200 | DirectiveKindMap[".cfi_endproc"] = DK_CFI_ENDPROC; |
5201 | DirectiveKindMap[".cfi_def_cfa"] = DK_CFI_DEF_CFA; |
5202 | DirectiveKindMap[".cfi_def_cfa_offset"] = DK_CFI_DEF_CFA_OFFSET; |
5203 | DirectiveKindMap[".cfi_adjust_cfa_offset"] = DK_CFI_ADJUST_CFA_OFFSET; |
5204 | DirectiveKindMap[".cfi_def_cfa_register"] = DK_CFI_DEF_CFA_REGISTER; |
5205 | DirectiveKindMap[".cfi_offset"] = DK_CFI_OFFSET; |
5206 | DirectiveKindMap[".cfi_rel_offset"] = DK_CFI_REL_OFFSET; |
5207 | DirectiveKindMap[".cfi_personality"] = DK_CFI_PERSONALITY; |
5208 | DirectiveKindMap[".cfi_lsda"] = DK_CFI_LSDA; |
5209 | DirectiveKindMap[".cfi_remember_state"] = DK_CFI_REMEMBER_STATE; |
5210 | DirectiveKindMap[".cfi_restore_state"] = DK_CFI_RESTORE_STATE; |
5211 | DirectiveKindMap[".cfi_same_value"] = DK_CFI_SAME_VALUE; |
5212 | DirectiveKindMap[".cfi_restore"] = DK_CFI_RESTORE; |
5213 | DirectiveKindMap[".cfi_escape"] = DK_CFI_ESCAPE; |
5214 | DirectiveKindMap[".cfi_return_column"] = DK_CFI_RETURN_COLUMN; |
5215 | DirectiveKindMap[".cfi_signal_frame"] = DK_CFI_SIGNAL_FRAME; |
5216 | DirectiveKindMap[".cfi_undefined"] = DK_CFI_UNDEFINED; |
5217 | DirectiveKindMap[".cfi_register"] = DK_CFI_REGISTER; |
5218 | DirectiveKindMap[".cfi_window_save"] = DK_CFI_WINDOW_SAVE; |
5219 | DirectiveKindMap[".macros_on"] = DK_MACROS_ON; |
5220 | DirectiveKindMap[".macros_off"] = DK_MACROS_OFF; |
5221 | DirectiveKindMap[".macro"] = DK_MACRO; |
5222 | DirectiveKindMap[".exitm"] = DK_EXITM; |
5223 | DirectiveKindMap[".endm"] = DK_ENDM; |
5224 | DirectiveKindMap[".endmacro"] = DK_ENDMACRO; |
5225 | DirectiveKindMap[".purgem"] = DK_PURGEM; |
5226 | DirectiveKindMap[".err"] = DK_ERR; |
5227 | DirectiveKindMap[".error"] = DK_ERROR; |
5228 | DirectiveKindMap[".warning"] = DK_WARNING; |
5229 | DirectiveKindMap[".altmacro"] = DK_ALTMACRO; |
5230 | DirectiveKindMap[".noaltmacro"] = DK_NOALTMACRO; |
5231 | DirectiveKindMap[".reloc"] = DK_RELOC; |
5232 | DirectiveKindMap[".dc"] = DK_DC; |
5233 | DirectiveKindMap[".dc.a"] = DK_DC_A; |
5234 | DirectiveKindMap[".dc.b"] = DK_DC_B; |
5235 | DirectiveKindMap[".dc.d"] = DK_DC_D; |
5236 | DirectiveKindMap[".dc.l"] = DK_DC_L; |
5237 | DirectiveKindMap[".dc.s"] = DK_DC_S; |
5238 | DirectiveKindMap[".dc.w"] = DK_DC_W; |
5239 | DirectiveKindMap[".dc.x"] = DK_DC_X; |
5240 | DirectiveKindMap[".dcb"] = DK_DCB; |
5241 | DirectiveKindMap[".dcb.b"] = DK_DCB_B; |
5242 | DirectiveKindMap[".dcb.d"] = DK_DCB_D; |
5243 | DirectiveKindMap[".dcb.l"] = DK_DCB_L; |
5244 | DirectiveKindMap[".dcb.s"] = DK_DCB_S; |
5245 | DirectiveKindMap[".dcb.w"] = DK_DCB_W; |
5246 | DirectiveKindMap[".dcb.x"] = DK_DCB_X; |
5247 | DirectiveKindMap[".ds"] = DK_DS; |
5248 | DirectiveKindMap[".ds.b"] = DK_DS_B; |
5249 | DirectiveKindMap[".ds.d"] = DK_DS_D; |
5250 | DirectiveKindMap[".ds.l"] = DK_DS_L; |
5251 | DirectiveKindMap[".ds.p"] = DK_DS_P; |
5252 | DirectiveKindMap[".ds.s"] = DK_DS_S; |
5253 | DirectiveKindMap[".ds.w"] = DK_DS_W; |
5254 | DirectiveKindMap[".ds.x"] = DK_DS_X; |
5255 | DirectiveKindMap[".print"] = DK_PRINT; |
5256 | } |
5257 | |
5258 | MCAsmMacro *AsmParser::parseMacroLikeBody(SMLoc DirectiveLoc) { |
5259 | AsmToken EndToken, StartToken = getTok(); |
5260 | |
5261 | unsigned NestLevel = 0; |
5262 | while (true) { |
5263 | // Check whether we have reached the end of the file. |
5264 | if (getLexer().is(AsmToken::Eof)) { |
5265 | printError(DirectiveLoc, "no matching '.endr' in definition"); |
5266 | return nullptr; |
5267 | } |
5268 | |
5269 | if (Lexer.is(AsmToken::Identifier) && |
5270 | (getTok().getIdentifier() == ".rept" || |
5271 | getTok().getIdentifier() == ".irp" || |
5272 | getTok().getIdentifier() == ".irpc")) { |
5273 | ++NestLevel; |
5274 | } |
5275 | |
5276 | // Otherwise, check whether we have reached the .endr. |
5277 | if (Lexer.is(AsmToken::Identifier) && getTok().getIdentifier() == ".endr") { |
5278 | if (NestLevel == 0) { |
5279 | EndToken = getTok(); |
5280 | Lex(); |
5281 | if (Lexer.isNot(AsmToken::EndOfStatement)) { |
5282 | printError(getTok().getLoc(), |
5283 | "unexpected token in '.endr' directive"); |
5284 | return nullptr; |
5285 | } |
5286 | break; |
5287 | } |
5288 | --NestLevel; |
5289 | } |
5290 | |
5291 | // Otherwise, scan till the end of the statement. |
5292 | eatToEndOfStatement(); |
5293 | } |
5294 | |
5295 | const char *BodyStart = StartToken.getLoc().getPointer(); |
5296 | const char *BodyEnd = EndToken.getLoc().getPointer(); |
5297 | StringRef Body = StringRef(BodyStart, BodyEnd - BodyStart); |
5298 | |
5299 | // We Are Anonymous. |
5300 | MacroLikeBodies.emplace_back(StringRef(), Body, MCAsmMacroParameters()); |
5301 | return &MacroLikeBodies.back(); |
5302 | } |
5303 | |
5304 | void AsmParser::instantiateMacroLikeBody(MCAsmMacro *M, SMLoc DirectiveLoc, |
5305 | raw_svector_ostream &OS) { |
5306 | OS << ".endr\n"; |
5307 | |
5308 | std::unique_ptr<MemoryBuffer> Instantiation = |
5309 | MemoryBuffer::getMemBufferCopy(OS.str(), "<instantiation>"); |
5310 | |
5311 | // Create the macro instantiation object and add to the current macro |
5312 | // instantiation stack. |
5313 | MacroInstantiation *MI = new MacroInstantiation( |
5314 | DirectiveLoc, CurBuffer, getTok().getLoc(), TheCondStack.size()); |
5315 | ActiveMacros.push_back(MI); |
5316 | |
5317 | // Jump to the macro instantiation and prime the lexer. |
5318 | CurBuffer = SrcMgr.AddNewSourceBuffer(std::move(Instantiation), SMLoc()); |
5319 | Lexer.setBuffer(SrcMgr.getMemoryBuffer(CurBuffer)->getBuffer()); |
5320 | Lex(); |
5321 | } |
5322 | |
5323 | /// parseDirectiveRept |
5324 | /// ::= .rep | .rept count |
5325 | bool AsmParser::parseDirectiveRept(SMLoc DirectiveLoc, StringRef Dir) { |
5326 | const MCExpr *CountExpr; |
5327 | SMLoc CountLoc = getTok().getLoc(); |
5328 | if (parseExpression(CountExpr)) |
5329 | return true; |
5330 | |
5331 | int64_t Count; |
5332 | if (!CountExpr->evaluateAsAbsolute(Count)) { |
5333 | return Error(CountLoc, "unexpected token in '" + Dir + "' directive"); |
5334 | } |
5335 | |
5336 | if (check(Count < 0, CountLoc, "Count is negative") || |
5337 | parseToken(AsmToken::EndOfStatement, |
5338 | "unexpected token in '" + Dir + "' directive")) |
5339 | return true; |
5340 | |
5341 | // Lex the rept definition. |
5342 | MCAsmMacro *M = parseMacroLikeBody(DirectiveLoc); |
5343 | if (!M) |
5344 | return true; |
5345 | |
5346 | // Macro instantiation is lexical, unfortunately. We construct a new buffer |
5347 | // to hold the macro body with substitutions. |
5348 | SmallString<256> Buf; |
5349 | raw_svector_ostream OS(Buf); |
5350 | while (Count--) { |
5351 | // Note that the AtPseudoVariable is disabled for instantiations of .rep(t). |
5352 | if (expandMacro(OS, M->Body, None, None, false, getTok().getLoc())) |
5353 | return true; |
5354 | } |
5355 | instantiateMacroLikeBody(M, DirectiveLoc, OS); |
5356 | |
5357 | return false; |
5358 | } |
5359 | |
5360 | /// parseDirectiveIrp |
5361 | /// ::= .irp symbol,values |
5362 | bool AsmParser::parseDirectiveIrp(SMLoc DirectiveLoc) { |
5363 | MCAsmMacroParameter Parameter; |
5364 | MCAsmMacroArguments A; |
5365 | if (check(parseIdentifier(Parameter.Name), |
5366 | "expected identifier in '.irp' directive") || |
5367 | parseToken(AsmToken::Comma, "expected comma in '.irp' directive") || |
5368 | parseMacroArguments(nullptr, A) || |
5369 | parseToken(AsmToken::EndOfStatement, "expected End of Statement")) |
5370 | return true; |
5371 | |
5372 | // Lex the irp definition. |
5373 | MCAsmMacro *M = parseMacroLikeBody(DirectiveLoc); |
5374 | if (!M) |
5375 | return true; |
5376 | |
5377 | // Macro instantiation is lexical, unfortunately. We construct a new buffer |
5378 | // to hold the macro body with substitutions. |
5379 | SmallString<256> Buf; |
5380 | raw_svector_ostream OS(Buf); |
5381 | |
5382 | for (const MCAsmMacroArgument &Arg : A) { |
5383 | // Note that the AtPseudoVariable is enabled for instantiations of .irp. |
5384 | // This is undocumented, but GAS seems to support it. |
5385 | if (expandMacro(OS, M->Body, Parameter, Arg, true, getTok().getLoc())) |
5386 | return true; |
5387 | } |
5388 | |
5389 | instantiateMacroLikeBody(M, DirectiveLoc, OS); |
5390 | |
5391 | return false; |
5392 | } |
5393 | |
5394 | /// parseDirectiveIrpc |
5395 | /// ::= .irpc symbol,values |
5396 | bool AsmParser::parseDirectiveIrpc(SMLoc DirectiveLoc) { |
5397 | MCAsmMacroParameter Parameter; |
5398 | MCAsmMacroArguments A; |
5399 | |
5400 | if (check(parseIdentifier(Parameter.Name), |
5401 | "expected identifier in '.irpc' directive") || |
5402 | parseToken(AsmToken::Comma, "expected comma in '.irpc' directive") || |
5403 | parseMacroArguments(nullptr, A)) |
5404 | return true; |
5405 | |
5406 | if (A.size() != 1 || A.front().size() != 1) |
5407 | return TokError("unexpected token in '.irpc' directive"); |
5408 | |
5409 | // Eat the end of statement. |
5410 | if (parseToken(AsmToken::EndOfStatement, "expected end of statement")) |
5411 | return true; |
5412 | |
5413 | // Lex the irpc definition. |
5414 | MCAsmMacro *M = parseMacroLikeBody(DirectiveLoc); |
5415 | if (!M) |
5416 | return true; |
5417 | |
5418 | // Macro instantiation is lexical, unfortunately. We construct a new buffer |
5419 | // to hold the macro body with substitutions. |
5420 | SmallString<256> Buf; |
5421 | raw_svector_ostream OS(Buf); |
5422 | |
5423 | StringRef Values = A.front().front().getString(); |
5424 | for (std::size_t I = 0, End = Values.size(); I != End; ++I) { |
5425 | MCAsmMacroArgument Arg; |
5426 | Arg.emplace_back(AsmToken::Identifier, Values.slice(I, I + 1)); |
5427 | |
5428 | // Note that the AtPseudoVariable is enabled for instantiations of .irpc. |
5429 | // This is undocumented, but GAS seems to support it. |
5430 | if (expandMacro(OS, M->Body, Parameter, Arg, true, getTok().getLoc())) |
5431 | return true; |
5432 | } |
5433 | |
5434 | instantiateMacroLikeBody(M, DirectiveLoc, OS); |
5435 | |
5436 | return false; |
5437 | } |
5438 | |
5439 | bool AsmParser::parseDirectiveEndr(SMLoc DirectiveLoc) { |
5440 | if (ActiveMacros.empty()) |
5441 | return TokError("unmatched '.endr' directive"); |
5442 | |
5443 | // The only .repl that should get here are the ones created by |
5444 | // instantiateMacroLikeBody. |
5445 | assert(getLexer().is(AsmToken::EndOfStatement))(static_cast <bool> (getLexer().is(AsmToken::EndOfStatement )) ? void (0) : __assert_fail ("getLexer().is(AsmToken::EndOfStatement)" , "/build/llvm-toolchain-snapshot-7~svn326551/lib/MC/MCParser/AsmParser.cpp" , 5445, __extension__ __PRETTY_FUNCTION__)); |
5446 | |
5447 | handleMacroExit(); |
5448 | return false; |
5449 | } |
5450 | |
5451 | bool AsmParser::parseDirectiveMSEmit(SMLoc IDLoc, ParseStatementInfo &Info, |
5452 | size_t Len) { |
5453 | const MCExpr *Value; |
5454 | SMLoc ExprLoc = getLexer().getLoc(); |
5455 | if (parseExpression(Value)) |
5456 | return true; |
5457 | const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Value); |
5458 | if (!MCE) |
5459 | return Error(ExprLoc, "unexpected expression in _emit"); |
5460 | uint64_t IntValue = MCE->getValue(); |
5461 | if (!isUInt<8>(IntValue) && !isInt<8>(IntValue)) |
5462 | return Error(ExprLoc, "literal value out of range for directive"); |
5463 | |
5464 | Info.AsmRewrites->emplace_back(AOK_Emit, IDLoc, Len); |
5465 | return false; |
5466 | } |
5467 | |
5468 | bool AsmParser::parseDirectiveMSAlign(SMLoc IDLoc, ParseStatementInfo &Info) { |
5469 | const MCExpr *Value; |
5470 | SMLoc ExprLoc = getLexer().getLoc(); |
5471 | if (parseExpression(Value)) |
5472 | return true; |
5473 | const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Value); |
5474 | if (!MCE) |
5475 | return Error(ExprLoc, "unexpected expression in align"); |
5476 | uint64_t IntValue = MCE->getValue(); |
5477 | if (!isPowerOf2_64(IntValue)) |
5478 | return Error(ExprLoc, "literal value not a power of two greater then zero"); |
5479 | |
5480 | Info.AsmRewrites->emplace_back(AOK_Align, IDLoc, 5, Log2_64(IntValue)); |
5481 | return false; |
5482 | } |
5483 | |
5484 | bool AsmParser::parseDirectivePrint(SMLoc DirectiveLoc) { |
5485 | const AsmToken StrTok = getTok(); |
5486 | Lex(); |
5487 | if (StrTok.isNot(AsmToken::String) || StrTok.getString().front() != '"') |
5488 | return Error(DirectiveLoc, "expected double quoted string after .print"); |
5489 | if (parseToken(AsmToken::EndOfStatement, "expected end of statement")) |
5490 | return true; |
5491 | llvm::outs() << StrTok.getStringContents() << '\n'; |
5492 | return false; |
5493 | } |
5494 | |
5495 | // We are comparing pointers, but the pointers are relative to a single string. |
5496 | // Thus, this should always be deterministic. |
5497 | static int rewritesSort(const AsmRewrite *AsmRewriteA, |
5498 | const AsmRewrite *AsmRewriteB) { |
5499 | if (AsmRewriteA->Loc.getPointer() < AsmRewriteB->Loc.getPointer()) |
5500 | return -1; |
5501 | if (AsmRewriteB->Loc.getPointer() < AsmRewriteA->Loc.getPointer()) |
5502 | return 1; |
5503 | |
5504 | // It's possible to have a SizeDirective, Imm/ImmPrefix and an Input/Output |
5505 | // rewrite to the same location. Make sure the SizeDirective rewrite is |
5506 | // performed first, then the Imm/ImmPrefix and finally the Input/Output. This |
5507 | // ensures the sort algorithm is stable. |
5508 | if (AsmRewritePrecedence[AsmRewriteA->Kind] > |
5509 | AsmRewritePrecedence[AsmRewriteB->Kind]) |
5510 | return -1; |
5511 | |
5512 | if (AsmRewritePrecedence[AsmRewriteA->Kind] < |
5513 | AsmRewritePrecedence[AsmRewriteB->Kind]) |
5514 | return 1; |
5515 | llvm_unreachable("Unstable rewrite sort.")::llvm::llvm_unreachable_internal("Unstable rewrite sort.", "/build/llvm-toolchain-snapshot-7~svn326551/lib/MC/MCParser/AsmParser.cpp" , 5515); |
5516 | } |
5517 | |
5518 | bool AsmParser::parseMSInlineAsm( |
5519 | void *AsmLoc, std::string &AsmString, unsigned &NumOutputs, |
5520 | unsigned &NumInputs, SmallVectorImpl<std::pair<void *, bool>> &OpDecls, |
5521 | SmallVectorImpl<std::string> &Constraints, |
5522 | SmallVectorImpl<std::string> &Clobbers, const MCInstrInfo *MII, |
5523 | const MCInstPrinter *IP, MCAsmParserSemaCallback &SI) { |
5524 | SmallVector<void *, 4> InputDecls; |
5525 | SmallVector<void *, 4> OutputDecls; |
5526 | SmallVector<bool, 4> InputDeclsAddressOf; |
5527 | SmallVector<bool, 4> OutputDeclsAddressOf; |
5528 | SmallVector<std::string, 4> InputConstraints; |
5529 | SmallVector<std::string, 4> OutputConstraints; |
5530 | SmallVector<unsigned, 4> ClobberRegs; |
5531 | |
5532 | SmallVector<AsmRewrite, 4> AsmStrRewrites; |
5533 | |
5534 | // Prime the lexer. |
5535 | Lex(); |
5536 | |
5537 | // While we have input, parse each statement. |
5538 | unsigned InputIdx = 0; |
5539 | unsigned OutputIdx = 0; |
5540 | while (getLexer().isNot(AsmToken::Eof)) { |
5541 | // Parse curly braces marking block start/end |
5542 | if (parseCurlyBlockScope(AsmStrRewrites)) |
5543 | continue; |
5544 | |
5545 | ParseStatementInfo Info(&AsmStrRewrites); |
5546 | bool StatementErr = parseStatement(Info, &SI); |
5547 | |
5548 | if (StatementErr || Info.ParseError) { |
5549 | // Emit pending errors if any exist. |
5550 | printPendingErrors(); |
5551 | return true; |
5552 | } |
5553 | |
5554 | // No pending error should exist here. |
5555 | assert(!hasPendingError() && "unexpected error from parseStatement")(static_cast <bool> (!hasPendingError() && "unexpected error from parseStatement" ) ? void (0) : __assert_fail ("!hasPendingError() && \"unexpected error from parseStatement\"" , "/build/llvm-toolchain-snapshot-7~svn326551/lib/MC/MCParser/AsmParser.cpp" , 5555, __extension__ __PRETTY_FUNCTION__)); |
5556 | |
5557 | if (Info.Opcode == ~0U) |
5558 | continue; |
5559 | |
5560 | const MCInstrDesc &Desc = MII->get(Info.Opcode); |
5561 | |
5562 | // Build the list of clobbers, outputs and inputs. |
5563 | for (unsigned i = 1, e = Info.ParsedOperands.size(); i != e; ++i) { |
5564 | MCParsedAsmOperand &Operand = *Info.ParsedOperands[i]; |
5565 | |
5566 | // Immediate. |
5567 | if (Operand.isImm()) |
5568 | continue; |
5569 | |
5570 | // Register operand. |
5571 | if (Operand.isReg() && !Operand.needAddressOf() && |
5572 | !getTargetParser().OmitRegisterFromClobberLists(Operand.getReg())) { |
5573 | unsigned NumDefs = Desc.getNumDefs(); |
5574 | // Clobber. |
5575 | if (NumDefs && Operand.getMCOperandNum() < NumDefs) |
5576 | ClobberRegs.push_back(Operand.getReg()); |
5577 | continue; |
5578 | } |
5579 | |
5580 | // Expr/Input or Output. |
5581 | StringRef SymName = Operand.getSymName(); |
5582 | if (SymName.empty()) |
5583 | continue; |
5584 | |
5585 | void *OpDecl = Operand.getOpDecl(); |
5586 | if (!OpDecl) |
5587 | continue; |
5588 | |
5589 | bool isOutput = (i == 1) && Desc.mayStore(); |
5590 | SMLoc Start = SMLoc::getFromPointer(SymName.data()); |
5591 | if (isOutput) { |
5592 | ++InputIdx; |
5593 | OutputDecls.push_back(OpDecl); |
5594 | OutputDeclsAddressOf.push_back(Operand.needAddressOf()); |
5595 | OutputConstraints.push_back(("=" + Operand.getConstraint()).str()); |
5596 | AsmStrRewrites.emplace_back(AOK_Output, Start, SymName.size()); |
5597 | } else { |
5598 | InputDecls.push_back(OpDecl); |
5599 | InputDeclsAddressOf.push_back(Operand.needAddressOf()); |
5600 | InputConstraints.push_back(Operand.getConstraint().str()); |
5601 | AsmStrRewrites.emplace_back(AOK_Input, Start, SymName.size()); |
5602 | } |
5603 | } |
5604 | |
5605 | // Consider implicit defs to be clobbers. Think of cpuid and push. |
5606 | ArrayRef<MCPhysReg> ImpDefs(Desc.getImplicitDefs(), |
5607 | Desc.getNumImplicitDefs()); |
5608 | ClobberRegs.insert(ClobberRegs.end(), ImpDefs.begin(), ImpDefs.end()); |
5609 | } |
5610 | |
5611 | // Set the number of Outputs and Inputs. |
5612 | NumOutputs = OutputDecls.size(); |
5613 | NumInputs = InputDecls.size(); |
5614 | |
5615 | // Set the unique clobbers. |
5616 | array_pod_sort(ClobberRegs.begin(), ClobberRegs.end()); |
5617 | ClobberRegs.erase(std::unique(ClobberRegs.begin(), ClobberRegs.end()), |
5618 | ClobberRegs.end()); |
5619 | Clobbers.assign(ClobberRegs.size(), std::string()); |
5620 | for (unsigned I = 0, E = ClobberRegs.size(); I != E; ++I) { |
5621 | raw_string_ostream OS(Clobbers[I]); |
5622 | IP->printRegName(OS, ClobberRegs[I]); |
5623 | } |
5624 | |
5625 | // Merge the various outputs and inputs. Output are expected first. |
5626 | if (NumOutputs || NumInputs) { |
5627 | unsigned NumExprs = NumOutputs + NumInputs; |
5628 | OpDecls.resize(NumExprs); |
5629 | Constraints.resize(NumExprs); |
5630 | for (unsigned i = 0; i < NumOutputs; ++i) { |
5631 | OpDecls[i] = std::make_pair(OutputDecls[i], OutputDeclsAddressOf[i]); |
5632 | Constraints[i] = OutputConstraints[i]; |
5633 | } |
5634 | for (unsigned i = 0, j = NumOutputs; i < NumInputs; ++i, ++j) { |
5635 | OpDecls[j] = std::make_pair(InputDecls[i], InputDeclsAddressOf[i]); |
5636 | Constraints[j] = InputConstraints[i]; |
5637 | } |
5638 | } |
5639 | |
5640 | // Build the IR assembly string. |
5641 | std::string AsmStringIR; |
5642 | raw_string_ostream OS(AsmStringIR); |
5643 | StringRef ASMString = |
5644 | SrcMgr.getMemoryBuffer(SrcMgr.getMainFileID())->getBuffer(); |
5645 | const char *AsmStart = ASMString.begin(); |
5646 | const char *AsmEnd = ASMString.end(); |
5647 | array_pod_sort(AsmStrRewrites.begin(), AsmStrRewrites.end(), rewritesSort); |
5648 | for (const AsmRewrite &AR : AsmStrRewrites) { |
5649 | AsmRewriteKind Kind = AR.Kind; |
5650 | |
5651 | const char *Loc = AR.Loc.getPointer(); |
5652 | assert(Loc >= AsmStart && "Expected Loc to be at or after Start!")(static_cast <bool> (Loc >= AsmStart && "Expected Loc to be at or after Start!" ) ? void (0) : __assert_fail ("Loc >= AsmStart && \"Expected Loc to be at or after Start!\"" , "/build/llvm-toolchain-snapshot-7~svn326551/lib/MC/MCParser/AsmParser.cpp" , 5652, __extension__ __PRETTY_FUNCTION__)); |
5653 | |
5654 | // Emit everything up to the immediate/expression. |
5655 | if (unsigned Len = Loc - AsmStart) |
5656 | OS << StringRef(AsmStart, Len); |
5657 | |
5658 | // Skip the original expression. |
5659 | if (Kind == AOK_Skip) { |
5660 | AsmStart = Loc + AR.Len; |
5661 | continue; |
5662 | } |
5663 | |
5664 | unsigned AdditionalSkip = 0; |
5665 | // Rewrite expressions in $N notation. |
5666 | switch (Kind) { |
5667 | default: |
5668 | break; |
5669 | case AOK_IntelExpr: |
5670 | assert(AR.IntelExp.isValid() && "cannot write invalid intel expression")(static_cast <bool> (AR.IntelExp.isValid() && "cannot write invalid intel expression" ) ? void (0) : __assert_fail ("AR.IntelExp.isValid() && \"cannot write invalid intel expression\"" , "/build/llvm-toolchain-snapshot-7~svn326551/lib/MC/MCParser/AsmParser.cpp" , 5670, __extension__ __PRETTY_FUNCTION__)); |
5671 | if (AR.IntelExp.NeedBracs) |
5672 | OS << "["; |
5673 | if (AR.IntelExp.hasBaseReg()) |
5674 | OS << AR.IntelExp.BaseReg; |
5675 | if (AR.IntelExp.hasIndexReg()) |
5676 | OS << (AR.IntelExp.hasBaseReg() ? " + " : "") |
5677 | << AR.IntelExp.IndexReg; |
5678 | if (AR.IntelExp.Scale > 1) |
5679 | OS << " * $$" << AR.IntelExp.Scale; |
5680 | if (AR.IntelExp.Imm || !AR.IntelExp.hasRegs()) |
5681 | OS << (AR.IntelExp.hasRegs() ? " + $$" : "$$") << AR.IntelExp.Imm; |
5682 | if (AR.IntelExp.NeedBracs) |
5683 | OS << "]"; |
5684 | break; |
5685 | case AOK_Label: |
5686 | OS << Ctx.getAsmInfo()->getPrivateLabelPrefix() << AR.Label; |
5687 | break; |
5688 | case AOK_Input: |
5689 | OS << '$' << InputIdx++; |
5690 | break; |
5691 | case AOK_Output: |
5692 | OS << '$' << OutputIdx++; |
5693 | break; |
5694 | case AOK_SizeDirective: |
5695 | switch (AR.Val) { |
5696 | default: break; |
5697 | case 8: OS << "byte ptr "; break; |
5698 | case 16: OS << "word ptr "; break; |
5699 | case 32: OS << "dword ptr "; break; |
5700 | case 64: OS << "qword ptr "; break; |
5701 | case 80: OS << "xword ptr "; break; |
5702 | case 128: OS << "xmmword ptr "; break; |
5703 | case 256: OS << "ymmword ptr "; break; |
5704 | } |
5705 | break; |
5706 | case AOK_Emit: |
5707 | OS << ".byte"; |
5708 | break; |
5709 | case AOK_Align: { |
5710 | // MS alignment directives are measured in bytes. If the native assembler |
5711 | // measures alignment in bytes, we can pass it straight through. |
5712 | OS << ".align"; |
5713 | if (getContext().getAsmInfo()->getAlignmentIsInBytes()) |
5714 | break; |
5715 | |
5716 | // Alignment is in log2 form, so print that instead and skip the original |
5717 | // immediate. |
5718 | unsigned Val = AR.Val; |
5719 | OS << ' ' << Val; |
5720 | assert(Val < 10 && "Expected alignment less then 2^10.")(static_cast <bool> (Val < 10 && "Expected alignment less then 2^10." ) ? void (0) : __assert_fail ("Val < 10 && \"Expected alignment less then 2^10.\"" , "/build/llvm-toolchain-snapshot-7~svn326551/lib/MC/MCParser/AsmParser.cpp" , 5720, __extension__ __PRETTY_FUNCTION__)); |
5721 | AdditionalSkip = (Val < 4) ? 2 : Val < 7 ? 3 : 4; |
5722 | break; |
5723 | } |
5724 | case AOK_EVEN: |
5725 | OS << ".even"; |
5726 | break; |
5727 | case AOK_EndOfStatement: |
5728 | OS << "\n\t"; |
5729 | break; |
5730 | } |
5731 | |
5732 | // Skip the original expression. |
5733 | AsmStart = Loc + AR.Len + AdditionalSkip; |
5734 | } |
5735 | |
5736 | // Emit the remainder of the asm string. |
5737 | if (AsmStart != AsmEnd) |
5738 | OS << StringRef(AsmStart, AsmEnd - AsmStart); |
5739 | |
5740 | AsmString = OS.str(); |
5741 | return false; |
5742 | } |
5743 | |
5744 | namespace llvm { |
5745 | namespace MCParserUtils { |
5746 | |
5747 | /// Returns whether the given symbol is used anywhere in the given expression, |
5748 | /// or subexpressions. |
5749 | static bool isSymbolUsedInExpression(const MCSymbol *Sym, const MCExpr *Value) { |
5750 | switch (Value->getKind()) { |
5751 | case MCExpr::Binary: { |
5752 | const MCBinaryExpr *BE = static_cast<const MCBinaryExpr *>(Value); |
5753 | return isSymbolUsedInExpression(Sym, BE->getLHS()) || |
5754 | isSymbolUsedInExpression(Sym, BE->getRHS()); |
5755 | } |
5756 | case MCExpr::Target: |
5757 | case MCExpr::Constant: |
5758 | return false; |
5759 | case MCExpr::SymbolRef: { |
5760 | const MCSymbol &S = |
5761 | static_cast<const MCSymbolRefExpr *>(Value)->getSymbol(); |
5762 | if (S.isVariable()) |
5763 | return isSymbolUsedInExpression(Sym, S.getVariableValue()); |
5764 | return &S == Sym; |
5765 | } |
5766 | case MCExpr::Unary: |
5767 | return isSymbolUsedInExpression( |
5768 | Sym, static_cast<const MCUnaryExpr *>(Value)->getSubExpr()); |
5769 | } |
5770 | |
5771 | llvm_unreachable("Unknown expr kind!")::llvm::llvm_unreachable_internal("Unknown expr kind!", "/build/llvm-toolchain-snapshot-7~svn326551/lib/MC/MCParser/AsmParser.cpp" , 5771); |
5772 | } |
5773 | |
5774 | bool parseAssignmentExpression(StringRef Name, bool allow_redef, |
5775 | MCAsmParser &Parser, MCSymbol *&Sym, |
5776 | const MCExpr *&Value) { |
5777 | |
5778 | // FIXME: Use better location, we should use proper tokens. |
5779 | SMLoc EqualLoc = Parser.getTok().getLoc(); |
5780 | |
5781 | if (Parser.parseExpression(Value)) { |
5782 | return Parser.TokError("missing expression"); |
5783 | } |
5784 | |
5785 | // Note: we don't count b as used in "a = b". This is to allow |
5786 | // a = b |
5787 | // b = c |
5788 | |
5789 | if (Parser.parseToken(AsmToken::EndOfStatement)) |
5790 | return true; |
5791 | |
5792 | // Validate that the LHS is allowed to be a variable (either it has not been |
5793 | // used as a symbol, or it is an absolute symbol). |
5794 | Sym = Parser.getContext().lookupSymbol(Name); |
5795 | if (Sym) { |
5796 | // Diagnose assignment to a label. |
5797 | // |
5798 | // FIXME: Diagnostics. Note the location of the definition as a label. |
5799 | // FIXME: Diagnose assignment to protected identifier (e.g., register name). |
5800 | if (isSymbolUsedInExpression(Sym, Value)) |
5801 | return Parser.Error(EqualLoc, "Recursive use of '" + Name + "'"); |
5802 | else if (Sym->isUndefined(/*SetUsed*/ false) && !Sym->isUsed() && |
5803 | !Sym->isVariable()) |
5804 | ; // Allow redefinitions of undefined symbols only used in directives. |
5805 | else if (Sym->isVariable() && !Sym->isUsed() && allow_redef) |
5806 | ; // Allow redefinitions of variables that haven't yet been used. |
5807 | else if (!Sym->isUndefined() && (!Sym->isVariable() || !allow_redef)) |
5808 | return Parser.Error(EqualLoc, "redefinition of '" + Name + "'"); |
5809 | else if (!Sym->isVariable()) |
5810 | return Parser.Error(EqualLoc, "invalid assignment to '" + Name + "'"); |
5811 | else if (!isa<MCConstantExpr>(Sym->getVariableValue())) |
5812 | return Parser.Error(EqualLoc, |
5813 | "invalid reassignment of non-absolute variable '" + |
5814 | Name + "'"); |
5815 | } else if (Name == ".") { |
5816 | Parser.getStreamer().emitValueToOffset(Value, 0, EqualLoc); |
5817 | return false; |
5818 | } else |
5819 | Sym = Parser.getContext().getOrCreateSymbol(Name); |
5820 | |
5821 | Sym->setRedefinable(allow_redef); |
5822 | |
5823 | return false; |
5824 | } |
5825 | |
5826 | } // end namespace MCParserUtils |
5827 | } // end namespace llvm |
5828 | |
5829 | /// \brief Create an MCAsmParser instance. |
5830 | MCAsmParser *llvm::createMCAsmParser(SourceMgr &SM, MCContext &C, |
5831 | MCStreamer &Out, const MCAsmInfo &MAI, |
5832 | unsigned CB) { |
5833 | return new AsmParser(SM, C, Out, MAI, CB); |
5834 | } |