File: | llvm/lib/MC/MCParser/AsmParser.cpp |
Warning: | line 5844, column 3 1st function call argument is an uninitialized value |
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1 | //===- AsmParser.cpp - Parser for Assembly Files --------------------------===// | ||||||
2 | // | ||||||
3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. | ||||||
4 | // See https://llvm.org/LICENSE.txt for license information. | ||||||
5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception | ||||||
6 | // | ||||||
7 | //===----------------------------------------------------------------------===// | ||||||
8 | // | ||||||
9 | // This class implements a parser for assembly files similar to gas syntax. | ||||||
10 | // | ||||||
11 | //===----------------------------------------------------------------------===// | ||||||
12 | |||||||
13 | #include "llvm/ADT/APFloat.h" | ||||||
14 | #include "llvm/ADT/APInt.h" | ||||||
15 | #include "llvm/ADT/ArrayRef.h" | ||||||
16 | #include "llvm/ADT/None.h" | ||||||
17 | #include "llvm/ADT/STLExtras.h" | ||||||
18 | #include "llvm/ADT/SmallString.h" | ||||||
19 | #include "llvm/ADT/SmallVector.h" | ||||||
20 | #include "llvm/ADT/StringExtras.h" | ||||||
21 | #include "llvm/ADT/StringMap.h" | ||||||
22 | #include "llvm/ADT/StringRef.h" | ||||||
23 | #include "llvm/ADT/Twine.h" | ||||||
24 | #include "llvm/BinaryFormat/Dwarf.h" | ||||||
25 | #include "llvm/DebugInfo/CodeView/SymbolRecord.h" | ||||||
26 | #include "llvm/MC/MCAsmInfo.h" | ||||||
27 | #include "llvm/MC/MCCodeView.h" | ||||||
28 | #include "llvm/MC/MCContext.h" | ||||||
29 | #include "llvm/MC/MCDirectives.h" | ||||||
30 | #include "llvm/MC/MCDwarf.h" | ||||||
31 | #include "llvm/MC/MCExpr.h" | ||||||
32 | #include "llvm/MC/MCInstPrinter.h" | ||||||
33 | #include "llvm/MC/MCInstrDesc.h" | ||||||
34 | #include "llvm/MC/MCInstrInfo.h" | ||||||
35 | #include "llvm/MC/MCObjectFileInfo.h" | ||||||
36 | #include "llvm/MC/MCParser/AsmCond.h" | ||||||
37 | #include "llvm/MC/MCParser/AsmLexer.h" | ||||||
38 | #include "llvm/MC/MCParser/MCAsmLexer.h" | ||||||
39 | #include "llvm/MC/MCParser/MCAsmParser.h" | ||||||
40 | #include "llvm/MC/MCParser/MCAsmParserExtension.h" | ||||||
41 | #include "llvm/MC/MCParser/MCAsmParserUtils.h" | ||||||
42 | #include "llvm/MC/MCParser/MCParsedAsmOperand.h" | ||||||
43 | #include "llvm/MC/MCParser/MCTargetAsmParser.h" | ||||||
44 | #include "llvm/MC/MCRegisterInfo.h" | ||||||
45 | #include "llvm/MC/MCSection.h" | ||||||
46 | #include "llvm/MC/MCStreamer.h" | ||||||
47 | #include "llvm/MC/MCSymbol.h" | ||||||
48 | #include "llvm/MC/MCTargetOptions.h" | ||||||
49 | #include "llvm/MC/MCValue.h" | ||||||
50 | #include "llvm/Support/Casting.h" | ||||||
51 | #include "llvm/Support/CommandLine.h" | ||||||
52 | #include "llvm/Support/ErrorHandling.h" | ||||||
53 | #include "llvm/Support/MD5.h" | ||||||
54 | #include "llvm/Support/MathExtras.h" | ||||||
55 | #include "llvm/Support/MemoryBuffer.h" | ||||||
56 | #include "llvm/Support/SMLoc.h" | ||||||
57 | #include "llvm/Support/SourceMgr.h" | ||||||
58 | #include "llvm/Support/raw_ostream.h" | ||||||
59 | #include <algorithm> | ||||||
60 | #include <cassert> | ||||||
61 | #include <cctype> | ||||||
62 | #include <climits> | ||||||
63 | #include <cstddef> | ||||||
64 | #include <cstdint> | ||||||
65 | #include <deque> | ||||||
66 | #include <memory> | ||||||
67 | #include <sstream> | ||||||
68 | #include <string> | ||||||
69 | #include <tuple> | ||||||
70 | #include <utility> | ||||||
71 | #include <vector> | ||||||
72 | |||||||
73 | using namespace llvm; | ||||||
74 | |||||||
75 | MCAsmParserSemaCallback::~MCAsmParserSemaCallback() = default; | ||||||
76 | |||||||
77 | extern cl::opt<unsigned> AsmMacroMaxNestingDepth; | ||||||
78 | |||||||
79 | namespace { | ||||||
80 | |||||||
81 | /// Helper types for tracking macro definitions. | ||||||
82 | typedef std::vector<AsmToken> MCAsmMacroArgument; | ||||||
83 | typedef std::vector<MCAsmMacroArgument> MCAsmMacroArguments; | ||||||
84 | |||||||
85 | /// Helper class for storing information about an active macro | ||||||
86 | /// instantiation. | ||||||
87 | struct MacroInstantiation { | ||||||
88 | /// The location of the instantiation. | ||||||
89 | SMLoc InstantiationLoc; | ||||||
90 | |||||||
91 | /// The buffer where parsing should resume upon instantiation completion. | ||||||
92 | unsigned ExitBuffer; | ||||||
93 | |||||||
94 | /// The location where parsing should resume upon instantiation completion. | ||||||
95 | SMLoc ExitLoc; | ||||||
96 | |||||||
97 | /// The depth of TheCondStack at the start of the instantiation. | ||||||
98 | size_t CondStackDepth; | ||||||
99 | }; | ||||||
100 | |||||||
101 | struct ParseStatementInfo { | ||||||
102 | /// The parsed operands from the last parsed statement. | ||||||
103 | SmallVector<std::unique_ptr<MCParsedAsmOperand>, 8> ParsedOperands; | ||||||
104 | |||||||
105 | /// The opcode from the last parsed instruction. | ||||||
106 | unsigned Opcode = ~0U; | ||||||
107 | |||||||
108 | /// Was there an error parsing the inline assembly? | ||||||
109 | bool ParseError = false; | ||||||
110 | |||||||
111 | SmallVectorImpl<AsmRewrite> *AsmRewrites = nullptr; | ||||||
112 | |||||||
113 | ParseStatementInfo() = delete; | ||||||
114 | ParseStatementInfo(SmallVectorImpl<AsmRewrite> *rewrites) | ||||||
115 | : AsmRewrites(rewrites) {} | ||||||
116 | }; | ||||||
117 | |||||||
118 | /// The concrete assembly parser instance. | ||||||
119 | class AsmParser : public MCAsmParser { | ||||||
120 | private: | ||||||
121 | AsmLexer Lexer; | ||||||
122 | MCContext &Ctx; | ||||||
123 | MCStreamer &Out; | ||||||
124 | const MCAsmInfo &MAI; | ||||||
125 | SourceMgr &SrcMgr; | ||||||
126 | SourceMgr::DiagHandlerTy SavedDiagHandler; | ||||||
127 | void *SavedDiagContext; | ||||||
128 | std::unique_ptr<MCAsmParserExtension> PlatformParser; | ||||||
129 | SMLoc StartTokLoc; | ||||||
130 | |||||||
131 | /// This is the current buffer index we're lexing from as managed by the | ||||||
132 | /// SourceMgr object. | ||||||
133 | unsigned CurBuffer; | ||||||
134 | |||||||
135 | AsmCond TheCondState; | ||||||
136 | std::vector<AsmCond> TheCondStack; | ||||||
137 | |||||||
138 | /// maps directive names to handler methods in parser | ||||||
139 | /// extensions. Extensions register themselves in this map by calling | ||||||
140 | /// addDirectiveHandler. | ||||||
141 | StringMap<ExtensionDirectiveHandler> ExtensionDirectiveMap; | ||||||
142 | |||||||
143 | /// Stack of active macro instantiations. | ||||||
144 | std::vector<MacroInstantiation*> ActiveMacros; | ||||||
145 | |||||||
146 | /// List of bodies of anonymous macros. | ||||||
147 | std::deque<MCAsmMacro> MacroLikeBodies; | ||||||
148 | |||||||
149 | /// Boolean tracking whether macro substitution is enabled. | ||||||
150 | unsigned MacrosEnabledFlag : 1; | ||||||
151 | |||||||
152 | /// Keeps track of how many .macro's have been instantiated. | ||||||
153 | unsigned NumOfMacroInstantiations; | ||||||
154 | |||||||
155 | /// The values from the last parsed cpp hash file line comment if any. | ||||||
156 | struct CppHashInfoTy { | ||||||
157 | StringRef Filename; | ||||||
158 | int64_t LineNumber; | ||||||
159 | SMLoc Loc; | ||||||
160 | unsigned Buf; | ||||||
161 | CppHashInfoTy() : Filename(), LineNumber(0), Loc(), Buf(0) {} | ||||||
162 | }; | ||||||
163 | CppHashInfoTy CppHashInfo; | ||||||
164 | |||||||
165 | /// The filename from the first cpp hash file line comment, if any. | ||||||
166 | StringRef FirstCppHashFilename; | ||||||
167 | |||||||
168 | /// List of forward directional labels for diagnosis at the end. | ||||||
169 | SmallVector<std::tuple<SMLoc, CppHashInfoTy, MCSymbol *>, 4> DirLabels; | ||||||
170 | |||||||
171 | /// AssemblerDialect. ~OU means unset value and use value provided by MAI. | ||||||
172 | unsigned AssemblerDialect = ~0U; | ||||||
173 | |||||||
174 | /// is Darwin compatibility enabled? | ||||||
175 | bool IsDarwin = false; | ||||||
176 | |||||||
177 | /// Are we parsing ms-style inline assembly? | ||||||
178 | bool ParsingMSInlineAsm = false; | ||||||
179 | |||||||
180 | /// Did we already inform the user about inconsistent MD5 usage? | ||||||
181 | bool ReportedInconsistentMD5 = false; | ||||||
182 | |||||||
183 | // Is alt macro mode enabled. | ||||||
184 | bool AltMacroMode = false; | ||||||
185 | |||||||
186 | public: | ||||||
187 | AsmParser(SourceMgr &SM, MCContext &Ctx, MCStreamer &Out, | ||||||
188 | const MCAsmInfo &MAI, unsigned CB); | ||||||
189 | AsmParser(const AsmParser &) = delete; | ||||||
190 | AsmParser &operator=(const AsmParser &) = delete; | ||||||
191 | ~AsmParser() override; | ||||||
192 | |||||||
193 | bool Run(bool NoInitialTextSection, bool NoFinalize = false) override; | ||||||
194 | |||||||
195 | void addDirectiveHandler(StringRef Directive, | ||||||
196 | ExtensionDirectiveHandler Handler) override { | ||||||
197 | ExtensionDirectiveMap[Directive] = Handler; | ||||||
198 | } | ||||||
199 | |||||||
200 | void addAliasForDirective(StringRef Directive, StringRef Alias) override { | ||||||
201 | DirectiveKindMap[Directive.lower()] = DirectiveKindMap[Alias.lower()]; | ||||||
202 | } | ||||||
203 | |||||||
204 | /// @name MCAsmParser Interface | ||||||
205 | /// { | ||||||
206 | |||||||
207 | SourceMgr &getSourceManager() override { return SrcMgr; } | ||||||
208 | MCAsmLexer &getLexer() override { return Lexer; } | ||||||
209 | MCContext &getContext() override { return Ctx; } | ||||||
210 | MCStreamer &getStreamer() override { return Out; } | ||||||
211 | |||||||
212 | CodeViewContext &getCVContext() { return Ctx.getCVContext(); } | ||||||
213 | |||||||
214 | unsigned getAssemblerDialect() override { | ||||||
215 | if (AssemblerDialect == ~0U) | ||||||
216 | return MAI.getAssemblerDialect(); | ||||||
217 | else | ||||||
218 | return AssemblerDialect; | ||||||
219 | } | ||||||
220 | void setAssemblerDialect(unsigned i) override { | ||||||
221 | AssemblerDialect = i; | ||||||
222 | } | ||||||
223 | |||||||
224 | void Note(SMLoc L, const Twine &Msg, SMRange Range = None) override; | ||||||
225 | bool Warning(SMLoc L, const Twine &Msg, SMRange Range = None) override; | ||||||
226 | bool printError(SMLoc L, const Twine &Msg, SMRange Range = None) override; | ||||||
227 | |||||||
228 | const AsmToken &Lex() override; | ||||||
229 | |||||||
230 | void setParsingMSInlineAsm(bool V) override { | ||||||
231 | ParsingMSInlineAsm = V; | ||||||
232 | // When parsing MS inline asm, we must lex 0b1101 and 0ABCH as binary and | ||||||
233 | // hex integer literals. | ||||||
234 | Lexer.setLexMasmIntegers(V); | ||||||
235 | } | ||||||
236 | bool isParsingMSInlineAsm() override { return ParsingMSInlineAsm; } | ||||||
237 | |||||||
238 | bool parseMSInlineAsm(void *AsmLoc, std::string &AsmString, | ||||||
239 | unsigned &NumOutputs, unsigned &NumInputs, | ||||||
240 | SmallVectorImpl<std::pair<void *,bool>> &OpDecls, | ||||||
241 | SmallVectorImpl<std::string> &Constraints, | ||||||
242 | SmallVectorImpl<std::string> &Clobbers, | ||||||
243 | const MCInstrInfo *MII, const MCInstPrinter *IP, | ||||||
244 | MCAsmParserSemaCallback &SI) override; | ||||||
245 | |||||||
246 | bool parseExpression(const MCExpr *&Res); | ||||||
247 | bool parseExpression(const MCExpr *&Res, SMLoc &EndLoc) override; | ||||||
248 | bool parsePrimaryExpr(const MCExpr *&Res, SMLoc &EndLoc, | ||||||
249 | AsmTypeInfo *TypeInfo) override; | ||||||
250 | bool parseParenExpression(const MCExpr *&Res, SMLoc &EndLoc) override; | ||||||
251 | bool parseParenExprOfDepth(unsigned ParenDepth, const MCExpr *&Res, | ||||||
252 | SMLoc &EndLoc) override; | ||||||
253 | bool parseAbsoluteExpression(int64_t &Res) override; | ||||||
254 | |||||||
255 | /// Parse a floating point expression using the float \p Semantics | ||||||
256 | /// and set \p Res to the value. | ||||||
257 | bool parseRealValue(const fltSemantics &Semantics, APInt &Res); | ||||||
258 | |||||||
259 | /// Parse an identifier or string (as a quoted identifier) | ||||||
260 | /// and set \p Res to the identifier contents. | ||||||
261 | bool parseIdentifier(StringRef &Res) override; | ||||||
262 | void eatToEndOfStatement() override; | ||||||
263 | |||||||
264 | bool checkForValidSection() override; | ||||||
265 | |||||||
266 | /// } | ||||||
267 | |||||||
268 | private: | ||||||
269 | bool parseStatement(ParseStatementInfo &Info, | ||||||
270 | MCAsmParserSemaCallback *SI); | ||||||
271 | bool parseCurlyBlockScope(SmallVectorImpl<AsmRewrite>& AsmStrRewrites); | ||||||
272 | bool parseCppHashLineFilenameComment(SMLoc L, bool SaveLocInfo = true); | ||||||
273 | |||||||
274 | void checkForBadMacro(SMLoc DirectiveLoc, StringRef Name, StringRef Body, | ||||||
275 | ArrayRef<MCAsmMacroParameter> Parameters); | ||||||
276 | bool expandMacro(raw_svector_ostream &OS, StringRef Body, | ||||||
277 | ArrayRef<MCAsmMacroParameter> Parameters, | ||||||
278 | ArrayRef<MCAsmMacroArgument> A, bool EnableAtPseudoVariable, | ||||||
279 | SMLoc L); | ||||||
280 | |||||||
281 | /// Are macros enabled in the parser? | ||||||
282 | bool areMacrosEnabled() {return MacrosEnabledFlag;} | ||||||
283 | |||||||
284 | /// Control a flag in the parser that enables or disables macros. | ||||||
285 | void setMacrosEnabled(bool Flag) {MacrosEnabledFlag = Flag;} | ||||||
286 | |||||||
287 | /// Are we inside a macro instantiation? | ||||||
288 | bool isInsideMacroInstantiation() {return !ActiveMacros.empty();} | ||||||
289 | |||||||
290 | /// Handle entry to macro instantiation. | ||||||
291 | /// | ||||||
292 | /// \param M The macro. | ||||||
293 | /// \param NameLoc Instantiation location. | ||||||
294 | bool handleMacroEntry(const MCAsmMacro *M, SMLoc NameLoc); | ||||||
295 | |||||||
296 | /// Handle exit from macro instantiation. | ||||||
297 | void handleMacroExit(); | ||||||
298 | |||||||
299 | /// Extract AsmTokens for a macro argument. | ||||||
300 | bool parseMacroArgument(MCAsmMacroArgument &MA, bool Vararg); | ||||||
301 | |||||||
302 | /// Parse all macro arguments for a given macro. | ||||||
303 | bool parseMacroArguments(const MCAsmMacro *M, MCAsmMacroArguments &A); | ||||||
304 | |||||||
305 | void printMacroInstantiations(); | ||||||
306 | void printMessage(SMLoc Loc, SourceMgr::DiagKind Kind, const Twine &Msg, | ||||||
307 | SMRange Range = None) const { | ||||||
308 | ArrayRef<SMRange> Ranges(Range); | ||||||
309 | SrcMgr.PrintMessage(Loc, Kind, Msg, Ranges); | ||||||
310 | } | ||||||
311 | static void DiagHandler(const SMDiagnostic &Diag, void *Context); | ||||||
312 | |||||||
313 | /// Should we emit DWARF describing this assembler source? (Returns false if | ||||||
314 | /// the source has .file directives, which means we don't want to generate | ||||||
315 | /// info describing the assembler source itself.) | ||||||
316 | bool enabledGenDwarfForAssembly(); | ||||||
317 | |||||||
318 | /// Enter the specified file. This returns true on failure. | ||||||
319 | bool enterIncludeFile(const std::string &Filename); | ||||||
320 | |||||||
321 | /// Process the specified file for the .incbin directive. | ||||||
322 | /// This returns true on failure. | ||||||
323 | bool processIncbinFile(const std::string &Filename, int64_t Skip = 0, | ||||||
324 | const MCExpr *Count = nullptr, SMLoc Loc = SMLoc()); | ||||||
325 | |||||||
326 | /// Reset the current lexer position to that given by \p Loc. The | ||||||
327 | /// current token is not set; clients should ensure Lex() is called | ||||||
328 | /// subsequently. | ||||||
329 | /// | ||||||
330 | /// \param InBuffer If not 0, should be the known buffer id that contains the | ||||||
331 | /// location. | ||||||
332 | void jumpToLoc(SMLoc Loc, unsigned InBuffer = 0); | ||||||
333 | |||||||
334 | /// Parse up to the end of statement and a return the contents from the | ||||||
335 | /// current token until the end of the statement; the current token on exit | ||||||
336 | /// will be either the EndOfStatement or EOF. | ||||||
337 | StringRef parseStringToEndOfStatement() override; | ||||||
338 | |||||||
339 | /// Parse until the end of a statement or a comma is encountered, | ||||||
340 | /// return the contents from the current token up to the end or comma. | ||||||
341 | StringRef parseStringToComma(); | ||||||
342 | |||||||
343 | bool parseAssignment(StringRef Name, bool allow_redef, | ||||||
344 | bool NoDeadStrip = false); | ||||||
345 | |||||||
346 | unsigned getBinOpPrecedence(AsmToken::TokenKind K, | ||||||
347 | MCBinaryExpr::Opcode &Kind); | ||||||
348 | |||||||
349 | bool parseBinOpRHS(unsigned Precedence, const MCExpr *&Res, SMLoc &EndLoc); | ||||||
350 | bool parseParenExpr(const MCExpr *&Res, SMLoc &EndLoc); | ||||||
351 | bool parseBracketExpr(const MCExpr *&Res, SMLoc &EndLoc); | ||||||
352 | |||||||
353 | bool parseRegisterOrRegisterNumber(int64_t &Register, SMLoc DirectiveLoc); | ||||||
354 | |||||||
355 | bool parseCVFunctionId(int64_t &FunctionId, StringRef DirectiveName); | ||||||
356 | bool parseCVFileId(int64_t &FileId, StringRef DirectiveName); | ||||||
357 | |||||||
358 | // Generic (target and platform independent) directive parsing. | ||||||
359 | enum DirectiveKind { | ||||||
360 | DK_NO_DIRECTIVE, // Placeholder | ||||||
361 | DK_SET, | ||||||
362 | DK_EQU, | ||||||
363 | DK_EQUIV, | ||||||
364 | DK_ASCII, | ||||||
365 | DK_ASCIZ, | ||||||
366 | DK_STRING, | ||||||
367 | DK_BYTE, | ||||||
368 | DK_SHORT, | ||||||
369 | DK_RELOC, | ||||||
370 | DK_VALUE, | ||||||
371 | DK_2BYTE, | ||||||
372 | DK_LONG, | ||||||
373 | DK_INT, | ||||||
374 | DK_4BYTE, | ||||||
375 | DK_QUAD, | ||||||
376 | DK_8BYTE, | ||||||
377 | DK_OCTA, | ||||||
378 | DK_DC, | ||||||
379 | DK_DC_A, | ||||||
380 | DK_DC_B, | ||||||
381 | DK_DC_D, | ||||||
382 | DK_DC_L, | ||||||
383 | DK_DC_S, | ||||||
384 | DK_DC_W, | ||||||
385 | DK_DC_X, | ||||||
386 | DK_DCB, | ||||||
387 | DK_DCB_B, | ||||||
388 | DK_DCB_D, | ||||||
389 | DK_DCB_L, | ||||||
390 | DK_DCB_S, | ||||||
391 | DK_DCB_W, | ||||||
392 | DK_DCB_X, | ||||||
393 | DK_DS, | ||||||
394 | DK_DS_B, | ||||||
395 | DK_DS_D, | ||||||
396 | DK_DS_L, | ||||||
397 | DK_DS_P, | ||||||
398 | DK_DS_S, | ||||||
399 | DK_DS_W, | ||||||
400 | DK_DS_X, | ||||||
401 | DK_SINGLE, | ||||||
402 | DK_FLOAT, | ||||||
403 | DK_DOUBLE, | ||||||
404 | DK_ALIGN, | ||||||
405 | DK_ALIGN32, | ||||||
406 | DK_BALIGN, | ||||||
407 | DK_BALIGNW, | ||||||
408 | DK_BALIGNL, | ||||||
409 | DK_P2ALIGN, | ||||||
410 | DK_P2ALIGNW, | ||||||
411 | DK_P2ALIGNL, | ||||||
412 | DK_ORG, | ||||||
413 | DK_FILL, | ||||||
414 | DK_ENDR, | ||||||
415 | DK_BUNDLE_ALIGN_MODE, | ||||||
416 | DK_BUNDLE_LOCK, | ||||||
417 | DK_BUNDLE_UNLOCK, | ||||||
418 | DK_ZERO, | ||||||
419 | DK_EXTERN, | ||||||
420 | DK_GLOBL, | ||||||
421 | DK_GLOBAL, | ||||||
422 | DK_LAZY_REFERENCE, | ||||||
423 | DK_NO_DEAD_STRIP, | ||||||
424 | DK_SYMBOL_RESOLVER, | ||||||
425 | DK_PRIVATE_EXTERN, | ||||||
426 | DK_REFERENCE, | ||||||
427 | DK_WEAK_DEFINITION, | ||||||
428 | DK_WEAK_REFERENCE, | ||||||
429 | DK_WEAK_DEF_CAN_BE_HIDDEN, | ||||||
430 | DK_COLD, | ||||||
431 | DK_COMM, | ||||||
432 | DK_COMMON, | ||||||
433 | DK_LCOMM, | ||||||
434 | DK_ABORT, | ||||||
435 | DK_INCLUDE, | ||||||
436 | DK_INCBIN, | ||||||
437 | DK_CODE16, | ||||||
438 | DK_CODE16GCC, | ||||||
439 | DK_REPT, | ||||||
440 | DK_IRP, | ||||||
441 | DK_IRPC, | ||||||
442 | DK_IF, | ||||||
443 | DK_IFEQ, | ||||||
444 | DK_IFGE, | ||||||
445 | DK_IFGT, | ||||||
446 | DK_IFLE, | ||||||
447 | DK_IFLT, | ||||||
448 | DK_IFNE, | ||||||
449 | DK_IFB, | ||||||
450 | DK_IFNB, | ||||||
451 | DK_IFC, | ||||||
452 | DK_IFEQS, | ||||||
453 | DK_IFNC, | ||||||
454 | DK_IFNES, | ||||||
455 | DK_IFDEF, | ||||||
456 | DK_IFNDEF, | ||||||
457 | DK_IFNOTDEF, | ||||||
458 | DK_ELSEIF, | ||||||
459 | DK_ELSE, | ||||||
460 | DK_ENDIF, | ||||||
461 | DK_SPACE, | ||||||
462 | DK_SKIP, | ||||||
463 | DK_FILE, | ||||||
464 | DK_LINE, | ||||||
465 | DK_LOC, | ||||||
466 | DK_STABS, | ||||||
467 | DK_CV_FILE, | ||||||
468 | DK_CV_FUNC_ID, | ||||||
469 | DK_CV_INLINE_SITE_ID, | ||||||
470 | DK_CV_LOC, | ||||||
471 | DK_CV_LINETABLE, | ||||||
472 | DK_CV_INLINE_LINETABLE, | ||||||
473 | DK_CV_DEF_RANGE, | ||||||
474 | DK_CV_STRINGTABLE, | ||||||
475 | DK_CV_STRING, | ||||||
476 | DK_CV_FILECHECKSUMS, | ||||||
477 | DK_CV_FILECHECKSUM_OFFSET, | ||||||
478 | DK_CV_FPO_DATA, | ||||||
479 | DK_CFI_SECTIONS, | ||||||
480 | DK_CFI_STARTPROC, | ||||||
481 | DK_CFI_ENDPROC, | ||||||
482 | DK_CFI_DEF_CFA, | ||||||
483 | DK_CFI_DEF_CFA_OFFSET, | ||||||
484 | DK_CFI_ADJUST_CFA_OFFSET, | ||||||
485 | DK_CFI_DEF_CFA_REGISTER, | ||||||
486 | DK_CFI_OFFSET, | ||||||
487 | DK_CFI_REL_OFFSET, | ||||||
488 | DK_CFI_PERSONALITY, | ||||||
489 | DK_CFI_LSDA, | ||||||
490 | DK_CFI_REMEMBER_STATE, | ||||||
491 | DK_CFI_RESTORE_STATE, | ||||||
492 | DK_CFI_SAME_VALUE, | ||||||
493 | DK_CFI_RESTORE, | ||||||
494 | DK_CFI_ESCAPE, | ||||||
495 | DK_CFI_RETURN_COLUMN, | ||||||
496 | DK_CFI_SIGNAL_FRAME, | ||||||
497 | DK_CFI_UNDEFINED, | ||||||
498 | DK_CFI_REGISTER, | ||||||
499 | DK_CFI_WINDOW_SAVE, | ||||||
500 | DK_CFI_B_KEY_FRAME, | ||||||
501 | DK_MACROS_ON, | ||||||
502 | DK_MACROS_OFF, | ||||||
503 | DK_ALTMACRO, | ||||||
504 | DK_NOALTMACRO, | ||||||
505 | DK_MACRO, | ||||||
506 | DK_EXITM, | ||||||
507 | DK_ENDM, | ||||||
508 | DK_ENDMACRO, | ||||||
509 | DK_PURGEM, | ||||||
510 | DK_SLEB128, | ||||||
511 | DK_ULEB128, | ||||||
512 | DK_ERR, | ||||||
513 | DK_ERROR, | ||||||
514 | DK_WARNING, | ||||||
515 | DK_PRINT, | ||||||
516 | DK_ADDRSIG, | ||||||
517 | DK_ADDRSIG_SYM, | ||||||
518 | DK_PSEUDO_PROBE, | ||||||
519 | DK_END | ||||||
520 | }; | ||||||
521 | |||||||
522 | /// Maps directive name --> DirectiveKind enum, for | ||||||
523 | /// directives parsed by this class. | ||||||
524 | StringMap<DirectiveKind> DirectiveKindMap; | ||||||
525 | |||||||
526 | // Codeview def_range type parsing. | ||||||
527 | enum CVDefRangeType { | ||||||
528 | CVDR_DEFRANGE = 0, // Placeholder | ||||||
529 | CVDR_DEFRANGE_REGISTER, | ||||||
530 | CVDR_DEFRANGE_FRAMEPOINTER_REL, | ||||||
531 | CVDR_DEFRANGE_SUBFIELD_REGISTER, | ||||||
532 | CVDR_DEFRANGE_REGISTER_REL | ||||||
533 | }; | ||||||
534 | |||||||
535 | /// Maps Codeview def_range types --> CVDefRangeType enum, for | ||||||
536 | /// Codeview def_range types parsed by this class. | ||||||
537 | StringMap<CVDefRangeType> CVDefRangeTypeMap; | ||||||
538 | |||||||
539 | // ".ascii", ".asciz", ".string" | ||||||
540 | bool parseDirectiveAscii(StringRef IDVal, bool ZeroTerminated); | ||||||
541 | bool parseDirectiveReloc(SMLoc DirectiveLoc); // ".reloc" | ||||||
542 | bool parseDirectiveValue(StringRef IDVal, | ||||||
543 | unsigned Size); // ".byte", ".long", ... | ||||||
544 | bool parseDirectiveOctaValue(StringRef IDVal); // ".octa", ... | ||||||
545 | bool parseDirectiveRealValue(StringRef IDVal, | ||||||
546 | const fltSemantics &); // ".single", ... | ||||||
547 | bool parseDirectiveFill(); // ".fill" | ||||||
548 | bool parseDirectiveZero(); // ".zero" | ||||||
549 | // ".set", ".equ", ".equiv" | ||||||
550 | bool parseDirectiveSet(StringRef IDVal, bool allow_redef); | ||||||
551 | bool parseDirectiveOrg(); // ".org" | ||||||
552 | // ".align{,32}", ".p2align{,w,l}" | ||||||
553 | bool parseDirectiveAlign(bool IsPow2, unsigned ValueSize); | ||||||
554 | |||||||
555 | // ".file", ".line", ".loc", ".stabs" | ||||||
556 | bool parseDirectiveFile(SMLoc DirectiveLoc); | ||||||
557 | bool parseDirectiveLine(); | ||||||
558 | bool parseDirectiveLoc(); | ||||||
559 | bool parseDirectiveStabs(); | ||||||
560 | |||||||
561 | // ".cv_file", ".cv_func_id", ".cv_inline_site_id", ".cv_loc", ".cv_linetable", | ||||||
562 | // ".cv_inline_linetable", ".cv_def_range", ".cv_string" | ||||||
563 | bool parseDirectiveCVFile(); | ||||||
564 | bool parseDirectiveCVFuncId(); | ||||||
565 | bool parseDirectiveCVInlineSiteId(); | ||||||
566 | bool parseDirectiveCVLoc(); | ||||||
567 | bool parseDirectiveCVLinetable(); | ||||||
568 | bool parseDirectiveCVInlineLinetable(); | ||||||
569 | bool parseDirectiveCVDefRange(); | ||||||
570 | bool parseDirectiveCVString(); | ||||||
571 | bool parseDirectiveCVStringTable(); | ||||||
572 | bool parseDirectiveCVFileChecksums(); | ||||||
573 | bool parseDirectiveCVFileChecksumOffset(); | ||||||
574 | bool parseDirectiveCVFPOData(); | ||||||
575 | |||||||
576 | // .cfi directives | ||||||
577 | bool parseDirectiveCFIRegister(SMLoc DirectiveLoc); | ||||||
578 | bool parseDirectiveCFIWindowSave(); | ||||||
579 | bool parseDirectiveCFISections(); | ||||||
580 | bool parseDirectiveCFIStartProc(); | ||||||
581 | bool parseDirectiveCFIEndProc(); | ||||||
582 | bool parseDirectiveCFIDefCfaOffset(); | ||||||
583 | bool parseDirectiveCFIDefCfa(SMLoc DirectiveLoc); | ||||||
584 | bool parseDirectiveCFIAdjustCfaOffset(); | ||||||
585 | bool parseDirectiveCFIDefCfaRegister(SMLoc DirectiveLoc); | ||||||
586 | bool parseDirectiveCFIOffset(SMLoc DirectiveLoc); | ||||||
587 | bool parseDirectiveCFIRelOffset(SMLoc DirectiveLoc); | ||||||
588 | bool parseDirectiveCFIPersonalityOrLsda(bool IsPersonality); | ||||||
589 | bool parseDirectiveCFIRememberState(); | ||||||
590 | bool parseDirectiveCFIRestoreState(); | ||||||
591 | bool parseDirectiveCFISameValue(SMLoc DirectiveLoc); | ||||||
592 | bool parseDirectiveCFIRestore(SMLoc DirectiveLoc); | ||||||
593 | bool parseDirectiveCFIEscape(); | ||||||
594 | bool parseDirectiveCFIReturnColumn(SMLoc DirectiveLoc); | ||||||
595 | bool parseDirectiveCFISignalFrame(); | ||||||
596 | bool parseDirectiveCFIUndefined(SMLoc DirectiveLoc); | ||||||
597 | |||||||
598 | // macro directives | ||||||
599 | bool parseDirectivePurgeMacro(SMLoc DirectiveLoc); | ||||||
600 | bool parseDirectiveExitMacro(StringRef Directive); | ||||||
601 | bool parseDirectiveEndMacro(StringRef Directive); | ||||||
602 | bool parseDirectiveMacro(SMLoc DirectiveLoc); | ||||||
603 | bool parseDirectiveMacrosOnOff(StringRef Directive); | ||||||
604 | // alternate macro mode directives | ||||||
605 | bool parseDirectiveAltmacro(StringRef Directive); | ||||||
606 | // ".bundle_align_mode" | ||||||
607 | bool parseDirectiveBundleAlignMode(); | ||||||
608 | // ".bundle_lock" | ||||||
609 | bool parseDirectiveBundleLock(); | ||||||
610 | // ".bundle_unlock" | ||||||
611 | bool parseDirectiveBundleUnlock(); | ||||||
612 | |||||||
613 | // ".space", ".skip" | ||||||
614 | bool parseDirectiveSpace(StringRef IDVal); | ||||||
615 | |||||||
616 | // ".dcb" | ||||||
617 | bool parseDirectiveDCB(StringRef IDVal, unsigned Size); | ||||||
618 | bool parseDirectiveRealDCB(StringRef IDVal, const fltSemantics &); | ||||||
619 | // ".ds" | ||||||
620 | bool parseDirectiveDS(StringRef IDVal, unsigned Size); | ||||||
621 | |||||||
622 | // .sleb128 (Signed=true) and .uleb128 (Signed=false) | ||||||
623 | bool parseDirectiveLEB128(bool Signed); | ||||||
624 | |||||||
625 | /// Parse a directive like ".globl" which | ||||||
626 | /// accepts a single symbol (which should be a label or an external). | ||||||
627 | bool parseDirectiveSymbolAttribute(MCSymbolAttr Attr); | ||||||
628 | |||||||
629 | bool parseDirectiveComm(bool IsLocal); // ".comm" and ".lcomm" | ||||||
630 | |||||||
631 | bool parseDirectiveAbort(); // ".abort" | ||||||
632 | bool parseDirectiveInclude(); // ".include" | ||||||
633 | bool parseDirectiveIncbin(); // ".incbin" | ||||||
634 | |||||||
635 | // ".if", ".ifeq", ".ifge", ".ifgt" , ".ifle", ".iflt" or ".ifne" | ||||||
636 | bool parseDirectiveIf(SMLoc DirectiveLoc, DirectiveKind DirKind); | ||||||
637 | // ".ifb" or ".ifnb", depending on ExpectBlank. | ||||||
638 | bool parseDirectiveIfb(SMLoc DirectiveLoc, bool ExpectBlank); | ||||||
639 | // ".ifc" or ".ifnc", depending on ExpectEqual. | ||||||
640 | bool parseDirectiveIfc(SMLoc DirectiveLoc, bool ExpectEqual); | ||||||
641 | // ".ifeqs" or ".ifnes", depending on ExpectEqual. | ||||||
642 | bool parseDirectiveIfeqs(SMLoc DirectiveLoc, bool ExpectEqual); | ||||||
643 | // ".ifdef" or ".ifndef", depending on expect_defined | ||||||
644 | bool parseDirectiveIfdef(SMLoc DirectiveLoc, bool expect_defined); | ||||||
645 | bool parseDirectiveElseIf(SMLoc DirectiveLoc); // ".elseif" | ||||||
646 | bool parseDirectiveElse(SMLoc DirectiveLoc); // ".else" | ||||||
647 | bool parseDirectiveEndIf(SMLoc DirectiveLoc); // .endif | ||||||
648 | bool parseEscapedString(std::string &Data) override; | ||||||
649 | bool parseAngleBracketString(std::string &Data) override; | ||||||
650 | |||||||
651 | const MCExpr *applyModifierToExpr(const MCExpr *E, | ||||||
652 | MCSymbolRefExpr::VariantKind Variant); | ||||||
653 | |||||||
654 | // Macro-like directives | ||||||
655 | MCAsmMacro *parseMacroLikeBody(SMLoc DirectiveLoc); | ||||||
656 | void instantiateMacroLikeBody(MCAsmMacro *M, SMLoc DirectiveLoc, | ||||||
657 | raw_svector_ostream &OS); | ||||||
658 | bool parseDirectiveRept(SMLoc DirectiveLoc, StringRef Directive); | ||||||
659 | bool parseDirectiveIrp(SMLoc DirectiveLoc); // ".irp" | ||||||
660 | bool parseDirectiveIrpc(SMLoc DirectiveLoc); // ".irpc" | ||||||
661 | bool parseDirectiveEndr(SMLoc DirectiveLoc); // ".endr" | ||||||
662 | |||||||
663 | // "_emit" or "__emit" | ||||||
664 | bool parseDirectiveMSEmit(SMLoc DirectiveLoc, ParseStatementInfo &Info, | ||||||
665 | size_t Len); | ||||||
666 | |||||||
667 | // "align" | ||||||
668 | bool parseDirectiveMSAlign(SMLoc DirectiveLoc, ParseStatementInfo &Info); | ||||||
669 | |||||||
670 | // "end" | ||||||
671 | bool parseDirectiveEnd(SMLoc DirectiveLoc); | ||||||
672 | |||||||
673 | // ".err" or ".error" | ||||||
674 | bool parseDirectiveError(SMLoc DirectiveLoc, bool WithMessage); | ||||||
675 | |||||||
676 | // ".warning" | ||||||
677 | bool parseDirectiveWarning(SMLoc DirectiveLoc); | ||||||
678 | |||||||
679 | // .print <double-quotes-string> | ||||||
680 | bool parseDirectivePrint(SMLoc DirectiveLoc); | ||||||
681 | |||||||
682 | // .pseudoprobe | ||||||
683 | bool parseDirectivePseudoProbe(); | ||||||
684 | |||||||
685 | // Directives to support address-significance tables. | ||||||
686 | bool parseDirectiveAddrsig(); | ||||||
687 | bool parseDirectiveAddrsigSym(); | ||||||
688 | |||||||
689 | void initializeDirectiveKindMap(); | ||||||
690 | void initializeCVDefRangeTypeMap(); | ||||||
691 | }; | ||||||
692 | |||||||
693 | } // end anonymous namespace | ||||||
694 | |||||||
695 | namespace llvm { | ||||||
696 | |||||||
697 | extern MCAsmParserExtension *createDarwinAsmParser(); | ||||||
698 | extern MCAsmParserExtension *createELFAsmParser(); | ||||||
699 | extern MCAsmParserExtension *createCOFFAsmParser(); | ||||||
700 | extern MCAsmParserExtension *createWasmAsmParser(); | ||||||
701 | |||||||
702 | } // end namespace llvm | ||||||
703 | |||||||
704 | enum { DEFAULT_ADDRSPACE = 0 }; | ||||||
705 | |||||||
706 | AsmParser::AsmParser(SourceMgr &SM, MCContext &Ctx, MCStreamer &Out, | ||||||
707 | const MCAsmInfo &MAI, unsigned CB = 0) | ||||||
708 | : Lexer(MAI), Ctx(Ctx), Out(Out), MAI(MAI), SrcMgr(SM), | ||||||
709 | CurBuffer(CB ? CB : SM.getMainFileID()), MacrosEnabledFlag(true) { | ||||||
710 | HadError = false; | ||||||
711 | // Save the old handler. | ||||||
712 | SavedDiagHandler = SrcMgr.getDiagHandler(); | ||||||
713 | SavedDiagContext = SrcMgr.getDiagContext(); | ||||||
714 | // Set our own handler which calls the saved handler. | ||||||
715 | SrcMgr.setDiagHandler(DiagHandler, this); | ||||||
716 | Lexer.setBuffer(SrcMgr.getMemoryBuffer(CurBuffer)->getBuffer()); | ||||||
717 | // Make MCStreamer aware of the StartTokLoc for locations in diagnostics. | ||||||
718 | Out.setStartTokLocPtr(&StartTokLoc); | ||||||
719 | |||||||
720 | // Initialize the platform / file format parser. | ||||||
721 | switch (Ctx.getObjectFileInfo()->getObjectFileType()) { | ||||||
722 | case MCObjectFileInfo::IsCOFF: | ||||||
723 | PlatformParser.reset(createCOFFAsmParser()); | ||||||
724 | break; | ||||||
725 | case MCObjectFileInfo::IsMachO: | ||||||
726 | PlatformParser.reset(createDarwinAsmParser()); | ||||||
727 | IsDarwin = true; | ||||||
728 | break; | ||||||
729 | case MCObjectFileInfo::IsELF: | ||||||
730 | PlatformParser.reset(createELFAsmParser()); | ||||||
731 | break; | ||||||
732 | case MCObjectFileInfo::IsWasm: | ||||||
733 | PlatformParser.reset(createWasmAsmParser()); | ||||||
734 | break; | ||||||
735 | case MCObjectFileInfo::IsXCOFF: | ||||||
736 | report_fatal_error( | ||||||
737 | "Need to implement createXCOFFAsmParser for XCOFF format."); | ||||||
738 | break; | ||||||
739 | } | ||||||
740 | |||||||
741 | PlatformParser->Initialize(*this); | ||||||
742 | initializeDirectiveKindMap(); | ||||||
743 | initializeCVDefRangeTypeMap(); | ||||||
744 | |||||||
745 | NumOfMacroInstantiations = 0; | ||||||
746 | } | ||||||
747 | |||||||
748 | AsmParser::~AsmParser() { | ||||||
749 | assert((HadError || ActiveMacros.empty()) &&(((HadError || ActiveMacros.empty()) && "Unexpected active macro instantiation!" ) ? static_cast<void> (0) : __assert_fail ("(HadError || ActiveMacros.empty()) && \"Unexpected active macro instantiation!\"" , "/build/llvm-toolchain-snapshot-13~++20210306111116+7ae191f59f0f/llvm/lib/MC/MCParser/AsmParser.cpp" , 750, __PRETTY_FUNCTION__)) | ||||||
750 | "Unexpected active macro instantiation!")(((HadError || ActiveMacros.empty()) && "Unexpected active macro instantiation!" ) ? static_cast<void> (0) : __assert_fail ("(HadError || ActiveMacros.empty()) && \"Unexpected active macro instantiation!\"" , "/build/llvm-toolchain-snapshot-13~++20210306111116+7ae191f59f0f/llvm/lib/MC/MCParser/AsmParser.cpp" , 750, __PRETTY_FUNCTION__)); | ||||||
751 | |||||||
752 | // Remove MCStreamer's reference to the parser SMLoc. | ||||||
753 | Out.setStartTokLocPtr(nullptr); | ||||||
754 | // Restore the saved diagnostics handler and context for use during | ||||||
755 | // finalization. | ||||||
756 | SrcMgr.setDiagHandler(SavedDiagHandler, SavedDiagContext); | ||||||
757 | } | ||||||
758 | |||||||
759 | void AsmParser::printMacroInstantiations() { | ||||||
760 | // Print the active macro instantiation stack. | ||||||
761 | for (std::vector<MacroInstantiation *>::const_reverse_iterator | ||||||
762 | it = ActiveMacros.rbegin(), | ||||||
763 | ie = ActiveMacros.rend(); | ||||||
764 | it != ie; ++it) | ||||||
765 | printMessage((*it)->InstantiationLoc, SourceMgr::DK_Note, | ||||||
766 | "while in macro instantiation"); | ||||||
767 | } | ||||||
768 | |||||||
769 | void AsmParser::Note(SMLoc L, const Twine &Msg, SMRange Range) { | ||||||
770 | printPendingErrors(); | ||||||
771 | printMessage(L, SourceMgr::DK_Note, Msg, Range); | ||||||
772 | printMacroInstantiations(); | ||||||
773 | } | ||||||
774 | |||||||
775 | bool AsmParser::Warning(SMLoc L, const Twine &Msg, SMRange Range) { | ||||||
776 | if(getTargetParser().getTargetOptions().MCNoWarn) | ||||||
777 | return false; | ||||||
778 | if (getTargetParser().getTargetOptions().MCFatalWarnings) | ||||||
779 | return Error(L, Msg, Range); | ||||||
780 | printMessage(L, SourceMgr::DK_Warning, Msg, Range); | ||||||
781 | printMacroInstantiations(); | ||||||
782 | return false; | ||||||
783 | } | ||||||
784 | |||||||
785 | bool AsmParser::printError(SMLoc L, const Twine &Msg, SMRange Range) { | ||||||
786 | HadError = true; | ||||||
787 | printMessage(L, SourceMgr::DK_Error, Msg, Range); | ||||||
788 | printMacroInstantiations(); | ||||||
789 | return true; | ||||||
790 | } | ||||||
791 | |||||||
792 | bool AsmParser::enterIncludeFile(const std::string &Filename) { | ||||||
793 | std::string IncludedFile; | ||||||
794 | unsigned NewBuf = | ||||||
795 | SrcMgr.AddIncludeFile(Filename, Lexer.getLoc(), IncludedFile); | ||||||
796 | if (!NewBuf) | ||||||
797 | return true; | ||||||
798 | |||||||
799 | CurBuffer = NewBuf; | ||||||
800 | Lexer.setBuffer(SrcMgr.getMemoryBuffer(CurBuffer)->getBuffer()); | ||||||
801 | return false; | ||||||
802 | } | ||||||
803 | |||||||
804 | /// Process the specified .incbin file by searching for it in the include paths | ||||||
805 | /// then just emitting the byte contents of the file to the streamer. This | ||||||
806 | /// returns true on failure. | ||||||
807 | bool AsmParser::processIncbinFile(const std::string &Filename, int64_t Skip, | ||||||
808 | const MCExpr *Count, SMLoc Loc) { | ||||||
809 | std::string IncludedFile; | ||||||
810 | unsigned NewBuf = | ||||||
811 | SrcMgr.AddIncludeFile(Filename, Lexer.getLoc(), IncludedFile); | ||||||
812 | if (!NewBuf) | ||||||
813 | return true; | ||||||
814 | |||||||
815 | // Pick up the bytes from the file and emit them. | ||||||
816 | StringRef Bytes = SrcMgr.getMemoryBuffer(NewBuf)->getBuffer(); | ||||||
817 | Bytes = Bytes.drop_front(Skip); | ||||||
818 | if (Count) { | ||||||
819 | int64_t Res; | ||||||
820 | if (!Count->evaluateAsAbsolute(Res, getStreamer().getAssemblerPtr())) | ||||||
821 | return Error(Loc, "expected absolute expression"); | ||||||
822 | if (Res < 0) | ||||||
823 | return Warning(Loc, "negative count has no effect"); | ||||||
824 | Bytes = Bytes.take_front(Res); | ||||||
825 | } | ||||||
826 | getStreamer().emitBytes(Bytes); | ||||||
827 | return false; | ||||||
828 | } | ||||||
829 | |||||||
830 | void AsmParser::jumpToLoc(SMLoc Loc, unsigned InBuffer) { | ||||||
831 | CurBuffer = InBuffer ? InBuffer : SrcMgr.FindBufferContainingLoc(Loc); | ||||||
832 | Lexer.setBuffer(SrcMgr.getMemoryBuffer(CurBuffer)->getBuffer(), | ||||||
833 | Loc.getPointer()); | ||||||
834 | } | ||||||
835 | |||||||
836 | const AsmToken &AsmParser::Lex() { | ||||||
837 | if (Lexer.getTok().is(AsmToken::Error)) | ||||||
838 | Error(Lexer.getErrLoc(), Lexer.getErr()); | ||||||
839 | |||||||
840 | // if it's a end of statement with a comment in it | ||||||
841 | if (getTok().is(AsmToken::EndOfStatement)) { | ||||||
842 | // if this is a line comment output it. | ||||||
843 | if (!getTok().getString().empty() && getTok().getString().front() != '\n' && | ||||||
844 | getTok().getString().front() != '\r' && MAI.preserveAsmComments()) | ||||||
845 | Out.addExplicitComment(Twine(getTok().getString())); | ||||||
846 | } | ||||||
847 | |||||||
848 | const AsmToken *tok = &Lexer.Lex(); | ||||||
849 | |||||||
850 | // Parse comments here to be deferred until end of next statement. | ||||||
851 | while (tok->is(AsmToken::Comment)) { | ||||||
852 | if (MAI.preserveAsmComments()) | ||||||
853 | Out.addExplicitComment(Twine(tok->getString())); | ||||||
854 | tok = &Lexer.Lex(); | ||||||
855 | } | ||||||
856 | |||||||
857 | if (tok->is(AsmToken::Eof)) { | ||||||
858 | // If this is the end of an included file, pop the parent file off the | ||||||
859 | // include stack. | ||||||
860 | SMLoc ParentIncludeLoc = SrcMgr.getParentIncludeLoc(CurBuffer); | ||||||
861 | if (ParentIncludeLoc != SMLoc()) { | ||||||
862 | jumpToLoc(ParentIncludeLoc); | ||||||
863 | return Lex(); | ||||||
864 | } | ||||||
865 | } | ||||||
866 | |||||||
867 | return *tok; | ||||||
868 | } | ||||||
869 | |||||||
870 | bool AsmParser::enabledGenDwarfForAssembly() { | ||||||
871 | // Check whether the user specified -g. | ||||||
872 | if (!getContext().getGenDwarfForAssembly()) | ||||||
873 | return false; | ||||||
874 | // If we haven't encountered any .file directives (which would imply that | ||||||
875 | // the assembler source was produced with debug info already) then emit one | ||||||
876 | // describing the assembler source file itself. | ||||||
877 | if (getContext().getGenDwarfFileNumber() == 0) { | ||||||
878 | // Use the first #line directive for this, if any. It's preprocessed, so | ||||||
879 | // there is no checksum, and of course no source directive. | ||||||
880 | if (!FirstCppHashFilename.empty()) | ||||||
881 | getContext().setMCLineTableRootFile(/*CUID=*/0, | ||||||
882 | getContext().getCompilationDir(), | ||||||
883 | FirstCppHashFilename, | ||||||
884 | /*Cksum=*/None, /*Source=*/None); | ||||||
885 | const MCDwarfFile &RootFile = | ||||||
886 | getContext().getMCDwarfLineTable(/*CUID=*/0).getRootFile(); | ||||||
887 | getContext().setGenDwarfFileNumber(getStreamer().emitDwarfFileDirective( | ||||||
888 | /*CUID=*/0, getContext().getCompilationDir(), RootFile.Name, | ||||||
889 | RootFile.Checksum, RootFile.Source)); | ||||||
890 | } | ||||||
891 | return true; | ||||||
892 | } | ||||||
893 | |||||||
894 | bool AsmParser::Run(bool NoInitialTextSection, bool NoFinalize) { | ||||||
895 | // Create the initial section, if requested. | ||||||
896 | if (!NoInitialTextSection) | ||||||
897 | Out.InitSections(false); | ||||||
898 | |||||||
899 | // Prime the lexer. | ||||||
900 | Lex(); | ||||||
901 | |||||||
902 | HadError = false; | ||||||
903 | AsmCond StartingCondState = TheCondState; | ||||||
904 | SmallVector<AsmRewrite, 4> AsmStrRewrites; | ||||||
905 | |||||||
906 | // If we are generating dwarf for assembly source files save the initial text | ||||||
907 | // section. (Don't use enabledGenDwarfForAssembly() here, as we aren't | ||||||
908 | // emitting any actual debug info yet and haven't had a chance to parse any | ||||||
909 | // embedded .file directives.) | ||||||
910 | if (getContext().getGenDwarfForAssembly()) { | ||||||
911 | MCSection *Sec = getStreamer().getCurrentSectionOnly(); | ||||||
912 | if (!Sec->getBeginSymbol()) { | ||||||
913 | MCSymbol *SectionStartSym = getContext().createTempSymbol(); | ||||||
914 | getStreamer().emitLabel(SectionStartSym); | ||||||
915 | Sec->setBeginSymbol(SectionStartSym); | ||||||
916 | } | ||||||
917 | bool InsertResult = getContext().addGenDwarfSection(Sec); | ||||||
918 | assert(InsertResult && ".text section should not have debug info yet")((InsertResult && ".text section should not have debug info yet" ) ? static_cast<void> (0) : __assert_fail ("InsertResult && \".text section should not have debug info yet\"" , "/build/llvm-toolchain-snapshot-13~++20210306111116+7ae191f59f0f/llvm/lib/MC/MCParser/AsmParser.cpp" , 918, __PRETTY_FUNCTION__)); | ||||||
919 | (void)InsertResult; | ||||||
920 | } | ||||||
921 | |||||||
922 | // While we have input, parse each statement. | ||||||
923 | while (Lexer.isNot(AsmToken::Eof)) { | ||||||
924 | ParseStatementInfo Info(&AsmStrRewrites); | ||||||
925 | bool Parsed = parseStatement(Info, nullptr); | ||||||
926 | |||||||
927 | // If we have a Lexer Error we are on an Error Token. Load in Lexer Error | ||||||
928 | // for printing ErrMsg via Lex() only if no (presumably better) parser error | ||||||
929 | // exists. | ||||||
930 | if (Parsed && !hasPendingError() && Lexer.getTok().is(AsmToken::Error)) { | ||||||
931 | Lex(); | ||||||
932 | } | ||||||
933 | |||||||
934 | // parseStatement returned true so may need to emit an error. | ||||||
935 | printPendingErrors(); | ||||||
936 | |||||||
937 | // Skipping to the next line if needed. | ||||||
938 | if (Parsed && !getLexer().isAtStartOfStatement()) | ||||||
939 | eatToEndOfStatement(); | ||||||
940 | } | ||||||
941 | |||||||
942 | getTargetParser().onEndOfFile(); | ||||||
943 | printPendingErrors(); | ||||||
944 | |||||||
945 | // All errors should have been emitted. | ||||||
946 | assert(!hasPendingError() && "unexpected error from parseStatement")((!hasPendingError() && "unexpected error from parseStatement" ) ? static_cast<void> (0) : __assert_fail ("!hasPendingError() && \"unexpected error from parseStatement\"" , "/build/llvm-toolchain-snapshot-13~++20210306111116+7ae191f59f0f/llvm/lib/MC/MCParser/AsmParser.cpp" , 946, __PRETTY_FUNCTION__)); | ||||||
947 | |||||||
948 | getTargetParser().flushPendingInstructions(getStreamer()); | ||||||
949 | |||||||
950 | if (TheCondState.TheCond != StartingCondState.TheCond || | ||||||
951 | TheCondState.Ignore != StartingCondState.Ignore) | ||||||
952 | printError(getTok().getLoc(), "unmatched .ifs or .elses"); | ||||||
953 | // Check to see there are no empty DwarfFile slots. | ||||||
954 | const auto &LineTables = getContext().getMCDwarfLineTables(); | ||||||
955 | if (!LineTables.empty()) { | ||||||
956 | unsigned Index = 0; | ||||||
957 | for (const auto &File : LineTables.begin()->second.getMCDwarfFiles()) { | ||||||
958 | if (File.Name.empty() && Index != 0) | ||||||
959 | printError(getTok().getLoc(), "unassigned file number: " + | ||||||
960 | Twine(Index) + | ||||||
961 | " for .file directives"); | ||||||
962 | ++Index; | ||||||
963 | } | ||||||
964 | } | ||||||
965 | |||||||
966 | // Check to see that all assembler local symbols were actually defined. | ||||||
967 | // Targets that don't do subsections via symbols may not want this, though, | ||||||
968 | // so conservatively exclude them. Only do this if we're finalizing, though, | ||||||
969 | // as otherwise we won't necessarilly have seen everything yet. | ||||||
970 | if (!NoFinalize) { | ||||||
971 | if (MAI.hasSubsectionsViaSymbols()) { | ||||||
972 | for (const auto &TableEntry : getContext().getSymbols()) { | ||||||
973 | MCSymbol *Sym = TableEntry.getValue(); | ||||||
974 | // Variable symbols may not be marked as defined, so check those | ||||||
975 | // explicitly. If we know it's a variable, we have a definition for | ||||||
976 | // the purposes of this check. | ||||||
977 | if (Sym->isTemporary() && !Sym->isVariable() && !Sym->isDefined()) | ||||||
978 | // FIXME: We would really like to refer back to where the symbol was | ||||||
979 | // first referenced for a source location. We need to add something | ||||||
980 | // to track that. Currently, we just point to the end of the file. | ||||||
981 | printError(getTok().getLoc(), "assembler local symbol '" + | ||||||
982 | Sym->getName() + "' not defined"); | ||||||
983 | } | ||||||
984 | } | ||||||
985 | |||||||
986 | // Temporary symbols like the ones for directional jumps don't go in the | ||||||
987 | // symbol table. They also need to be diagnosed in all (final) cases. | ||||||
988 | for (std::tuple<SMLoc, CppHashInfoTy, MCSymbol *> &LocSym : DirLabels) { | ||||||
989 | if (std::get<2>(LocSym)->isUndefined()) { | ||||||
990 | // Reset the state of any "# line file" directives we've seen to the | ||||||
991 | // context as it was at the diagnostic site. | ||||||
992 | CppHashInfo = std::get<1>(LocSym); | ||||||
993 | printError(std::get<0>(LocSym), "directional label undefined"); | ||||||
994 | } | ||||||
995 | } | ||||||
996 | } | ||||||
997 | |||||||
998 | // Finalize the output stream if there are no errors and if the client wants | ||||||
999 | // us to. | ||||||
1000 | if (!HadError && !NoFinalize) | ||||||
1001 | Out.Finish(Lexer.getLoc()); | ||||||
1002 | |||||||
1003 | return HadError || getContext().hadError(); | ||||||
1004 | } | ||||||
1005 | |||||||
1006 | bool AsmParser::checkForValidSection() { | ||||||
1007 | if (!ParsingMSInlineAsm && !getStreamer().getCurrentSectionOnly()) { | ||||||
1008 | Out.InitSections(false); | ||||||
1009 | return Error(getTok().getLoc(), | ||||||
1010 | "expected section directive before assembly directive"); | ||||||
1011 | } | ||||||
1012 | return false; | ||||||
1013 | } | ||||||
1014 | |||||||
1015 | /// Throw away the rest of the line for testing purposes. | ||||||
1016 | void AsmParser::eatToEndOfStatement() { | ||||||
1017 | while (Lexer.isNot(AsmToken::EndOfStatement) && Lexer.isNot(AsmToken::Eof)) | ||||||
1018 | Lexer.Lex(); | ||||||
1019 | |||||||
1020 | // Eat EOL. | ||||||
1021 | if (Lexer.is(AsmToken::EndOfStatement)) | ||||||
1022 | Lexer.Lex(); | ||||||
1023 | } | ||||||
1024 | |||||||
1025 | StringRef AsmParser::parseStringToEndOfStatement() { | ||||||
1026 | const char *Start = getTok().getLoc().getPointer(); | ||||||
1027 | |||||||
1028 | while (Lexer.isNot(AsmToken::EndOfStatement) && Lexer.isNot(AsmToken::Eof)) | ||||||
1029 | Lexer.Lex(); | ||||||
1030 | |||||||
1031 | const char *End = getTok().getLoc().getPointer(); | ||||||
1032 | return StringRef(Start, End - Start); | ||||||
1033 | } | ||||||
1034 | |||||||
1035 | StringRef AsmParser::parseStringToComma() { | ||||||
1036 | const char *Start = getTok().getLoc().getPointer(); | ||||||
1037 | |||||||
1038 | while (Lexer.isNot(AsmToken::EndOfStatement) && | ||||||
1039 | Lexer.isNot(AsmToken::Comma) && Lexer.isNot(AsmToken::Eof)) | ||||||
1040 | Lexer.Lex(); | ||||||
1041 | |||||||
1042 | const char *End = getTok().getLoc().getPointer(); | ||||||
1043 | return StringRef(Start, End - Start); | ||||||
1044 | } | ||||||
1045 | |||||||
1046 | /// Parse a paren expression and return it. | ||||||
1047 | /// NOTE: This assumes the leading '(' has already been consumed. | ||||||
1048 | /// | ||||||
1049 | /// parenexpr ::= expr) | ||||||
1050 | /// | ||||||
1051 | bool AsmParser::parseParenExpr(const MCExpr *&Res, SMLoc &EndLoc) { | ||||||
1052 | if (parseExpression(Res)) | ||||||
1053 | return true; | ||||||
1054 | if (Lexer.isNot(AsmToken::RParen)) | ||||||
1055 | return TokError("expected ')' in parentheses expression"); | ||||||
1056 | EndLoc = Lexer.getTok().getEndLoc(); | ||||||
1057 | Lex(); | ||||||
1058 | return false; | ||||||
1059 | } | ||||||
1060 | |||||||
1061 | /// Parse a bracket expression and return it. | ||||||
1062 | /// NOTE: This assumes the leading '[' has already been consumed. | ||||||
1063 | /// | ||||||
1064 | /// bracketexpr ::= expr] | ||||||
1065 | /// | ||||||
1066 | bool AsmParser::parseBracketExpr(const MCExpr *&Res, SMLoc &EndLoc) { | ||||||
1067 | if (parseExpression(Res)) | ||||||
1068 | return true; | ||||||
1069 | EndLoc = getTok().getEndLoc(); | ||||||
1070 | if (parseToken(AsmToken::RBrac, "expected ']' in brackets expression")) | ||||||
1071 | return true; | ||||||
1072 | return false; | ||||||
1073 | } | ||||||
1074 | |||||||
1075 | /// Parse a primary expression and return it. | ||||||
1076 | /// primaryexpr ::= (parenexpr | ||||||
1077 | /// primaryexpr ::= symbol | ||||||
1078 | /// primaryexpr ::= number | ||||||
1079 | /// primaryexpr ::= '.' | ||||||
1080 | /// primaryexpr ::= ~,+,- primaryexpr | ||||||
1081 | bool AsmParser::parsePrimaryExpr(const MCExpr *&Res, SMLoc &EndLoc, | ||||||
1082 | AsmTypeInfo *TypeInfo) { | ||||||
1083 | SMLoc FirstTokenLoc = getLexer().getLoc(); | ||||||
1084 | AsmToken::TokenKind FirstTokenKind = Lexer.getKind(); | ||||||
1085 | switch (FirstTokenKind) { | ||||||
1086 | default: | ||||||
1087 | return TokError("unknown token in expression"); | ||||||
1088 | // If we have an error assume that we've already handled it. | ||||||
1089 | case AsmToken::Error: | ||||||
1090 | return true; | ||||||
1091 | case AsmToken::Exclaim: | ||||||
1092 | Lex(); // Eat the operator. | ||||||
1093 | if (parsePrimaryExpr(Res, EndLoc, TypeInfo)) | ||||||
1094 | return true; | ||||||
1095 | Res = MCUnaryExpr::createLNot(Res, getContext(), FirstTokenLoc); | ||||||
1096 | return false; | ||||||
1097 | case AsmToken::Dollar: | ||||||
1098 | case AsmToken::At: | ||||||
1099 | case AsmToken::String: | ||||||
1100 | case AsmToken::Identifier: { | ||||||
1101 | StringRef Identifier; | ||||||
1102 | if (parseIdentifier(Identifier)) { | ||||||
1103 | // We may have failed but $ may be a valid token. | ||||||
1104 | if (getTok().is(AsmToken::Dollar)) { | ||||||
1105 | if (Lexer.getMAI().getDollarIsPC()) { | ||||||
1106 | Lex(); | ||||||
1107 | // This is a '$' reference, which references the current PC. Emit a | ||||||
1108 | // temporary label to the streamer and refer to it. | ||||||
1109 | MCSymbol *Sym = Ctx.createTempSymbol(); | ||||||
1110 | Out.emitLabel(Sym); | ||||||
1111 | Res = MCSymbolRefExpr::create(Sym, MCSymbolRefExpr::VK_None, | ||||||
1112 | getContext()); | ||||||
1113 | EndLoc = FirstTokenLoc; | ||||||
1114 | return false; | ||||||
1115 | } | ||||||
1116 | return Error(FirstTokenLoc, "invalid token in expression"); | ||||||
1117 | } | ||||||
1118 | } | ||||||
1119 | // Parse symbol variant | ||||||
1120 | std::pair<StringRef, StringRef> Split; | ||||||
1121 | if (!MAI.useParensForSymbolVariant()) { | ||||||
1122 | if (FirstTokenKind == AsmToken::String) { | ||||||
1123 | if (Lexer.is(AsmToken::At)) { | ||||||
1124 | Lex(); // eat @ | ||||||
1125 | SMLoc AtLoc = getLexer().getLoc(); | ||||||
1126 | StringRef VName; | ||||||
1127 | if (parseIdentifier(VName)) | ||||||
1128 | return Error(AtLoc, "expected symbol variant after '@'"); | ||||||
1129 | |||||||
1130 | Split = std::make_pair(Identifier, VName); | ||||||
1131 | } | ||||||
1132 | } else { | ||||||
1133 | Split = Identifier.split('@'); | ||||||
1134 | } | ||||||
1135 | } else if (Lexer.is(AsmToken::LParen)) { | ||||||
1136 | Lex(); // eat '('. | ||||||
1137 | StringRef VName; | ||||||
1138 | parseIdentifier(VName); | ||||||
1139 | // eat ')'. | ||||||
1140 | if (parseToken(AsmToken::RParen, | ||||||
1141 | "unexpected token in variant, expected ')'")) | ||||||
1142 | return true; | ||||||
1143 | Split = std::make_pair(Identifier, VName); | ||||||
1144 | } | ||||||
1145 | |||||||
1146 | EndLoc = SMLoc::getFromPointer(Identifier.end()); | ||||||
1147 | |||||||
1148 | // This is a symbol reference. | ||||||
1149 | StringRef SymbolName = Identifier; | ||||||
1150 | if (SymbolName.empty()) | ||||||
1151 | return Error(getLexer().getLoc(), "expected a symbol reference"); | ||||||
1152 | |||||||
1153 | MCSymbolRefExpr::VariantKind Variant = MCSymbolRefExpr::VK_None; | ||||||
1154 | |||||||
1155 | // Lookup the symbol variant if used. | ||||||
1156 | if (!Split.second.empty()) { | ||||||
1157 | Variant = MCSymbolRefExpr::getVariantKindForName(Split.second); | ||||||
1158 | if (Variant != MCSymbolRefExpr::VK_Invalid) { | ||||||
1159 | SymbolName = Split.first; | ||||||
1160 | } else if (MAI.doesAllowAtInName() && !MAI.useParensForSymbolVariant()) { | ||||||
1161 | Variant = MCSymbolRefExpr::VK_None; | ||||||
1162 | } else { | ||||||
1163 | return Error(SMLoc::getFromPointer(Split.second.begin()), | ||||||
1164 | "invalid variant '" + Split.second + "'"); | ||||||
1165 | } | ||||||
1166 | } | ||||||
1167 | |||||||
1168 | MCSymbol *Sym = getContext().getInlineAsmLabel(SymbolName); | ||||||
1169 | if (!Sym) | ||||||
1170 | Sym = getContext().getOrCreateSymbol(SymbolName); | ||||||
1171 | |||||||
1172 | // If this is an absolute variable reference, substitute it now to preserve | ||||||
1173 | // semantics in the face of reassignment. | ||||||
1174 | if (Sym->isVariable()) { | ||||||
1175 | auto V = Sym->getVariableValue(/*SetUsed*/ false); | ||||||
1176 | bool DoInline = isa<MCConstantExpr>(V) && !Variant; | ||||||
1177 | if (auto TV = dyn_cast<MCTargetExpr>(V)) | ||||||
1178 | DoInline = TV->inlineAssignedExpr(); | ||||||
1179 | if (DoInline) { | ||||||
1180 | if (Variant) | ||||||
1181 | return Error(EndLoc, "unexpected modifier on variable reference"); | ||||||
1182 | Res = Sym->getVariableValue(/*SetUsed*/ false); | ||||||
1183 | return false; | ||||||
1184 | } | ||||||
1185 | } | ||||||
1186 | |||||||
1187 | // Otherwise create a symbol ref. | ||||||
1188 | Res = MCSymbolRefExpr::create(Sym, Variant, getContext(), FirstTokenLoc); | ||||||
1189 | return false; | ||||||
1190 | } | ||||||
1191 | case AsmToken::BigNum: | ||||||
1192 | return TokError("literal value out of range for directive"); | ||||||
1193 | case AsmToken::Integer: { | ||||||
1194 | SMLoc Loc = getTok().getLoc(); | ||||||
1195 | int64_t IntVal = getTok().getIntVal(); | ||||||
1196 | Res = MCConstantExpr::create(IntVal, getContext()); | ||||||
1197 | EndLoc = Lexer.getTok().getEndLoc(); | ||||||
1198 | Lex(); // Eat token. | ||||||
1199 | // Look for 'b' or 'f' following an Integer as a directional label | ||||||
1200 | if (Lexer.getKind() == AsmToken::Identifier) { | ||||||
1201 | StringRef IDVal = getTok().getString(); | ||||||
1202 | // Lookup the symbol variant if used. | ||||||
1203 | std::pair<StringRef, StringRef> Split = IDVal.split('@'); | ||||||
1204 | MCSymbolRefExpr::VariantKind Variant = MCSymbolRefExpr::VK_None; | ||||||
1205 | if (Split.first.size() != IDVal.size()) { | ||||||
1206 | Variant = MCSymbolRefExpr::getVariantKindForName(Split.second); | ||||||
1207 | if (Variant == MCSymbolRefExpr::VK_Invalid) | ||||||
1208 | return TokError("invalid variant '" + Split.second + "'"); | ||||||
1209 | IDVal = Split.first; | ||||||
1210 | } | ||||||
1211 | if (IDVal == "f" || IDVal == "b") { | ||||||
1212 | MCSymbol *Sym = | ||||||
1213 | Ctx.getDirectionalLocalSymbol(IntVal, IDVal == "b"); | ||||||
1214 | Res = MCSymbolRefExpr::create(Sym, Variant, getContext()); | ||||||
1215 | if (IDVal == "b" && Sym->isUndefined()) | ||||||
1216 | return Error(Loc, "directional label undefined"); | ||||||
1217 | DirLabels.push_back(std::make_tuple(Loc, CppHashInfo, Sym)); | ||||||
1218 | EndLoc = Lexer.getTok().getEndLoc(); | ||||||
1219 | Lex(); // Eat identifier. | ||||||
1220 | } | ||||||
1221 | } | ||||||
1222 | return false; | ||||||
1223 | } | ||||||
1224 | case AsmToken::Real: { | ||||||
1225 | APFloat RealVal(APFloat::IEEEdouble(), getTok().getString()); | ||||||
1226 | uint64_t IntVal = RealVal.bitcastToAPInt().getZExtValue(); | ||||||
1227 | Res = MCConstantExpr::create(IntVal, getContext()); | ||||||
1228 | EndLoc = Lexer.getTok().getEndLoc(); | ||||||
1229 | Lex(); // Eat token. | ||||||
1230 | return false; | ||||||
1231 | } | ||||||
1232 | case AsmToken::Dot: { | ||||||
1233 | // This is a '.' reference, which references the current PC. Emit a | ||||||
1234 | // temporary label to the streamer and refer to it. | ||||||
1235 | MCSymbol *Sym = Ctx.createTempSymbol(); | ||||||
1236 | Out.emitLabel(Sym); | ||||||
1237 | Res = MCSymbolRefExpr::create(Sym, MCSymbolRefExpr::VK_None, getContext()); | ||||||
1238 | EndLoc = Lexer.getTok().getEndLoc(); | ||||||
1239 | Lex(); // Eat identifier. | ||||||
1240 | return false; | ||||||
1241 | } | ||||||
1242 | case AsmToken::LParen: | ||||||
1243 | Lex(); // Eat the '('. | ||||||
1244 | return parseParenExpr(Res, EndLoc); | ||||||
1245 | case AsmToken::LBrac: | ||||||
1246 | if (!PlatformParser->HasBracketExpressions()) | ||||||
1247 | return TokError("brackets expression not supported on this target"); | ||||||
1248 | Lex(); // Eat the '['. | ||||||
1249 | return parseBracketExpr(Res, EndLoc); | ||||||
1250 | case AsmToken::Minus: | ||||||
1251 | Lex(); // Eat the operator. | ||||||
1252 | if (parsePrimaryExpr(Res, EndLoc, TypeInfo)) | ||||||
1253 | return true; | ||||||
1254 | Res = MCUnaryExpr::createMinus(Res, getContext(), FirstTokenLoc); | ||||||
1255 | return false; | ||||||
1256 | case AsmToken::Plus: | ||||||
1257 | Lex(); // Eat the operator. | ||||||
1258 | if (parsePrimaryExpr(Res, EndLoc, TypeInfo)) | ||||||
1259 | return true; | ||||||
1260 | Res = MCUnaryExpr::createPlus(Res, getContext(), FirstTokenLoc); | ||||||
1261 | return false; | ||||||
1262 | case AsmToken::Tilde: | ||||||
1263 | Lex(); // Eat the operator. | ||||||
1264 | if (parsePrimaryExpr(Res, EndLoc, TypeInfo)) | ||||||
1265 | return true; | ||||||
1266 | Res = MCUnaryExpr::createNot(Res, getContext(), FirstTokenLoc); | ||||||
1267 | return false; | ||||||
1268 | // MIPS unary expression operators. The lexer won't generate these tokens if | ||||||
1269 | // MCAsmInfo::HasMipsExpressions is false for the target. | ||||||
1270 | case AsmToken::PercentCall16: | ||||||
1271 | case AsmToken::PercentCall_Hi: | ||||||
1272 | case AsmToken::PercentCall_Lo: | ||||||
1273 | case AsmToken::PercentDtprel_Hi: | ||||||
1274 | case AsmToken::PercentDtprel_Lo: | ||||||
1275 | case AsmToken::PercentGot: | ||||||
1276 | case AsmToken::PercentGot_Disp: | ||||||
1277 | case AsmToken::PercentGot_Hi: | ||||||
1278 | case AsmToken::PercentGot_Lo: | ||||||
1279 | case AsmToken::PercentGot_Ofst: | ||||||
1280 | case AsmToken::PercentGot_Page: | ||||||
1281 | case AsmToken::PercentGottprel: | ||||||
1282 | case AsmToken::PercentGp_Rel: | ||||||
1283 | case AsmToken::PercentHi: | ||||||
1284 | case AsmToken::PercentHigher: | ||||||
1285 | case AsmToken::PercentHighest: | ||||||
1286 | case AsmToken::PercentLo: | ||||||
1287 | case AsmToken::PercentNeg: | ||||||
1288 | case AsmToken::PercentPcrel_Hi: | ||||||
1289 | case AsmToken::PercentPcrel_Lo: | ||||||
1290 | case AsmToken::PercentTlsgd: | ||||||
1291 | case AsmToken::PercentTlsldm: | ||||||
1292 | case AsmToken::PercentTprel_Hi: | ||||||
1293 | case AsmToken::PercentTprel_Lo: | ||||||
1294 | Lex(); // Eat the operator. | ||||||
1295 | if (Lexer.isNot(AsmToken::LParen)) | ||||||
1296 | return TokError("expected '(' after operator"); | ||||||
1297 | Lex(); // Eat the operator. | ||||||
1298 | if (parseExpression(Res, EndLoc)) | ||||||
1299 | return true; | ||||||
1300 | if (Lexer.isNot(AsmToken::RParen)) | ||||||
1301 | return TokError("expected ')'"); | ||||||
1302 | Lex(); // Eat the operator. | ||||||
1303 | Res = getTargetParser().createTargetUnaryExpr(Res, FirstTokenKind, Ctx); | ||||||
1304 | return !Res; | ||||||
1305 | } | ||||||
1306 | } | ||||||
1307 | |||||||
1308 | bool AsmParser::parseExpression(const MCExpr *&Res) { | ||||||
1309 | SMLoc EndLoc; | ||||||
1310 | return parseExpression(Res, EndLoc); | ||||||
1311 | } | ||||||
1312 | |||||||
1313 | const MCExpr * | ||||||
1314 | AsmParser::applyModifierToExpr(const MCExpr *E, | ||||||
1315 | MCSymbolRefExpr::VariantKind Variant) { | ||||||
1316 | // Ask the target implementation about this expression first. | ||||||
1317 | const MCExpr *NewE = getTargetParser().applyModifierToExpr(E, Variant, Ctx); | ||||||
1318 | if (NewE) | ||||||
1319 | return NewE; | ||||||
1320 | // Recurse over the given expression, rebuilding it to apply the given variant | ||||||
1321 | // if there is exactly one symbol. | ||||||
1322 | switch (E->getKind()) { | ||||||
1323 | case MCExpr::Target: | ||||||
1324 | case MCExpr::Constant: | ||||||
1325 | return nullptr; | ||||||
1326 | |||||||
1327 | case MCExpr::SymbolRef: { | ||||||
1328 | const MCSymbolRefExpr *SRE = cast<MCSymbolRefExpr>(E); | ||||||
1329 | |||||||
1330 | if (SRE->getKind() != MCSymbolRefExpr::VK_None) { | ||||||
1331 | TokError("invalid variant on expression '" + getTok().getIdentifier() + | ||||||
1332 | "' (already modified)"); | ||||||
1333 | return E; | ||||||
1334 | } | ||||||
1335 | |||||||
1336 | return MCSymbolRefExpr::create(&SRE->getSymbol(), Variant, getContext()); | ||||||
1337 | } | ||||||
1338 | |||||||
1339 | case MCExpr::Unary: { | ||||||
1340 | const MCUnaryExpr *UE = cast<MCUnaryExpr>(E); | ||||||
1341 | const MCExpr *Sub = applyModifierToExpr(UE->getSubExpr(), Variant); | ||||||
1342 | if (!Sub) | ||||||
1343 | return nullptr; | ||||||
1344 | return MCUnaryExpr::create(UE->getOpcode(), Sub, getContext()); | ||||||
1345 | } | ||||||
1346 | |||||||
1347 | case MCExpr::Binary: { | ||||||
1348 | const MCBinaryExpr *BE = cast<MCBinaryExpr>(E); | ||||||
1349 | const MCExpr *LHS = applyModifierToExpr(BE->getLHS(), Variant); | ||||||
1350 | const MCExpr *RHS = applyModifierToExpr(BE->getRHS(), Variant); | ||||||
1351 | |||||||
1352 | if (!LHS && !RHS) | ||||||
1353 | return nullptr; | ||||||
1354 | |||||||
1355 | if (!LHS) | ||||||
1356 | LHS = BE->getLHS(); | ||||||
1357 | if (!RHS) | ||||||
1358 | RHS = BE->getRHS(); | ||||||
1359 | |||||||
1360 | return MCBinaryExpr::create(BE->getOpcode(), LHS, RHS, getContext()); | ||||||
1361 | } | ||||||
1362 | } | ||||||
1363 | |||||||
1364 | llvm_unreachable("Invalid expression kind!")::llvm::llvm_unreachable_internal("Invalid expression kind!", "/build/llvm-toolchain-snapshot-13~++20210306111116+7ae191f59f0f/llvm/lib/MC/MCParser/AsmParser.cpp" , 1364); | ||||||
1365 | } | ||||||
1366 | |||||||
1367 | /// This function checks if the next token is <string> type or arithmetic. | ||||||
1368 | /// string that begin with character '<' must end with character '>'. | ||||||
1369 | /// otherwise it is arithmetics. | ||||||
1370 | /// If the function returns a 'true' value, | ||||||
1371 | /// the End argument will be filled with the last location pointed to the '>' | ||||||
1372 | /// character. | ||||||
1373 | |||||||
1374 | /// There is a gap between the AltMacro's documentation and the single quote | ||||||
1375 | /// implementation. GCC does not fully support this feature and so we will not | ||||||
1376 | /// support it. | ||||||
1377 | /// TODO: Adding single quote as a string. | ||||||
1378 | static bool isAngleBracketString(SMLoc &StrLoc, SMLoc &EndLoc) { | ||||||
1379 | assert((StrLoc.getPointer() != nullptr) &&(((StrLoc.getPointer() != nullptr) && "Argument to the function cannot be a NULL value" ) ? static_cast<void> (0) : __assert_fail ("(StrLoc.getPointer() != nullptr) && \"Argument to the function cannot be a NULL value\"" , "/build/llvm-toolchain-snapshot-13~++20210306111116+7ae191f59f0f/llvm/lib/MC/MCParser/AsmParser.cpp" , 1380, __PRETTY_FUNCTION__)) | ||||||
1380 | "Argument to the function cannot be a NULL value")(((StrLoc.getPointer() != nullptr) && "Argument to the function cannot be a NULL value" ) ? static_cast<void> (0) : __assert_fail ("(StrLoc.getPointer() != nullptr) && \"Argument to the function cannot be a NULL value\"" , "/build/llvm-toolchain-snapshot-13~++20210306111116+7ae191f59f0f/llvm/lib/MC/MCParser/AsmParser.cpp" , 1380, __PRETTY_FUNCTION__)); | ||||||
1381 | const char *CharPtr = StrLoc.getPointer(); | ||||||
1382 | while ((*CharPtr != '>') && (*CharPtr != '\n') && (*CharPtr != '\r') && | ||||||
1383 | (*CharPtr != '\0')) { | ||||||
1384 | if (*CharPtr == '!') | ||||||
1385 | CharPtr++; | ||||||
1386 | CharPtr++; | ||||||
1387 | } | ||||||
1388 | if (*CharPtr == '>') { | ||||||
1389 | EndLoc = StrLoc.getFromPointer(CharPtr + 1); | ||||||
1390 | return true; | ||||||
1391 | } | ||||||
1392 | return false; | ||||||
1393 | } | ||||||
1394 | |||||||
1395 | /// creating a string without the escape characters '!'. | ||||||
1396 | static std::string angleBracketString(StringRef AltMacroStr) { | ||||||
1397 | std::string Res; | ||||||
1398 | for (size_t Pos = 0; Pos < AltMacroStr.size(); Pos++) { | ||||||
1399 | if (AltMacroStr[Pos] == '!') | ||||||
1400 | Pos++; | ||||||
1401 | Res += AltMacroStr[Pos]; | ||||||
1402 | } | ||||||
1403 | return Res; | ||||||
1404 | } | ||||||
1405 | |||||||
1406 | /// Parse an expression and return it. | ||||||
1407 | /// | ||||||
1408 | /// expr ::= expr &&,|| expr -> lowest. | ||||||
1409 | /// expr ::= expr |,^,&,! expr | ||||||
1410 | /// expr ::= expr ==,!=,<>,<,<=,>,>= expr | ||||||
1411 | /// expr ::= expr <<,>> expr | ||||||
1412 | /// expr ::= expr +,- expr | ||||||
1413 | /// expr ::= expr *,/,% expr -> highest. | ||||||
1414 | /// expr ::= primaryexpr | ||||||
1415 | /// | ||||||
1416 | bool AsmParser::parseExpression(const MCExpr *&Res, SMLoc &EndLoc) { | ||||||
1417 | // Parse the expression. | ||||||
1418 | Res = nullptr; | ||||||
1419 | if (getTargetParser().parsePrimaryExpr(Res, EndLoc) || | ||||||
1420 | parseBinOpRHS(1, Res, EndLoc)) | ||||||
1421 | return true; | ||||||
1422 | |||||||
1423 | // As a special case, we support 'a op b @ modifier' by rewriting the | ||||||
1424 | // expression to include the modifier. This is inefficient, but in general we | ||||||
1425 | // expect users to use 'a@modifier op b'. | ||||||
1426 | if (Lexer.getKind() == AsmToken::At) { | ||||||
1427 | Lex(); | ||||||
1428 | |||||||
1429 | if (Lexer.isNot(AsmToken::Identifier)) | ||||||
1430 | return TokError("unexpected symbol modifier following '@'"); | ||||||
1431 | |||||||
1432 | MCSymbolRefExpr::VariantKind Variant = | ||||||
1433 | MCSymbolRefExpr::getVariantKindForName(getTok().getIdentifier()); | ||||||
1434 | if (Variant == MCSymbolRefExpr::VK_Invalid) | ||||||
1435 | return TokError("invalid variant '" + getTok().getIdentifier() + "'"); | ||||||
1436 | |||||||
1437 | const MCExpr *ModifiedRes = applyModifierToExpr(Res, Variant); | ||||||
1438 | if (!ModifiedRes) { | ||||||
1439 | return TokError("invalid modifier '" + getTok().getIdentifier() + | ||||||
1440 | "' (no symbols present)"); | ||||||
1441 | } | ||||||
1442 | |||||||
1443 | Res = ModifiedRes; | ||||||
1444 | Lex(); | ||||||
1445 | } | ||||||
1446 | |||||||
1447 | // Try to constant fold it up front, if possible. Do not exploit | ||||||
1448 | // assembler here. | ||||||
1449 | int64_t Value; | ||||||
1450 | if (Res->evaluateAsAbsolute(Value)) | ||||||
1451 | Res = MCConstantExpr::create(Value, getContext()); | ||||||
1452 | |||||||
1453 | return false; | ||||||
1454 | } | ||||||
1455 | |||||||
1456 | bool AsmParser::parseParenExpression(const MCExpr *&Res, SMLoc &EndLoc) { | ||||||
1457 | Res = nullptr; | ||||||
1458 | return parseParenExpr(Res, EndLoc) || parseBinOpRHS(1, Res, EndLoc); | ||||||
1459 | } | ||||||
1460 | |||||||
1461 | bool AsmParser::parseParenExprOfDepth(unsigned ParenDepth, const MCExpr *&Res, | ||||||
1462 | SMLoc &EndLoc) { | ||||||
1463 | if (parseParenExpr(Res, EndLoc)) | ||||||
1464 | return true; | ||||||
1465 | |||||||
1466 | for (; ParenDepth > 0; --ParenDepth) { | ||||||
1467 | if (parseBinOpRHS(1, Res, EndLoc)) | ||||||
1468 | return true; | ||||||
1469 | |||||||
1470 | // We don't Lex() the last RParen. | ||||||
1471 | // This is the same behavior as parseParenExpression(). | ||||||
1472 | if (ParenDepth - 1 > 0) { | ||||||
1473 | EndLoc = getTok().getEndLoc(); | ||||||
1474 | if (parseToken(AsmToken::RParen, | ||||||
1475 | "expected ')' in parentheses expression")) | ||||||
1476 | return true; | ||||||
1477 | } | ||||||
1478 | } | ||||||
1479 | return false; | ||||||
1480 | } | ||||||
1481 | |||||||
1482 | bool AsmParser::parseAbsoluteExpression(int64_t &Res) { | ||||||
1483 | const MCExpr *Expr; | ||||||
1484 | |||||||
1485 | SMLoc StartLoc = Lexer.getLoc(); | ||||||
1486 | if (parseExpression(Expr)) | ||||||
1487 | return true; | ||||||
1488 | |||||||
1489 | if (!Expr->evaluateAsAbsolute(Res, getStreamer().getAssemblerPtr())) | ||||||
1490 | return Error(StartLoc, "expected absolute expression"); | ||||||
1491 | |||||||
1492 | return false; | ||||||
1493 | } | ||||||
1494 | |||||||
1495 | static unsigned getDarwinBinOpPrecedence(AsmToken::TokenKind K, | ||||||
1496 | MCBinaryExpr::Opcode &Kind, | ||||||
1497 | bool ShouldUseLogicalShr) { | ||||||
1498 | switch (K) { | ||||||
1499 | default: | ||||||
1500 | return 0; // not a binop. | ||||||
1501 | |||||||
1502 | // Lowest Precedence: &&, || | ||||||
1503 | case AsmToken::AmpAmp: | ||||||
1504 | Kind = MCBinaryExpr::LAnd; | ||||||
1505 | return 1; | ||||||
1506 | case AsmToken::PipePipe: | ||||||
1507 | Kind = MCBinaryExpr::LOr; | ||||||
1508 | return 1; | ||||||
1509 | |||||||
1510 | // Low Precedence: |, &, ^ | ||||||
1511 | case AsmToken::Pipe: | ||||||
1512 | Kind = MCBinaryExpr::Or; | ||||||
1513 | return 2; | ||||||
1514 | case AsmToken::Caret: | ||||||
1515 | Kind = MCBinaryExpr::Xor; | ||||||
1516 | return 2; | ||||||
1517 | case AsmToken::Amp: | ||||||
1518 | Kind = MCBinaryExpr::And; | ||||||
1519 | return 2; | ||||||
1520 | |||||||
1521 | // Low Intermediate Precedence: ==, !=, <>, <, <=, >, >= | ||||||
1522 | case AsmToken::EqualEqual: | ||||||
1523 | Kind = MCBinaryExpr::EQ; | ||||||
1524 | return 3; | ||||||
1525 | case AsmToken::ExclaimEqual: | ||||||
1526 | case AsmToken::LessGreater: | ||||||
1527 | Kind = MCBinaryExpr::NE; | ||||||
1528 | return 3; | ||||||
1529 | case AsmToken::Less: | ||||||
1530 | Kind = MCBinaryExpr::LT; | ||||||
1531 | return 3; | ||||||
1532 | case AsmToken::LessEqual: | ||||||
1533 | Kind = MCBinaryExpr::LTE; | ||||||
1534 | return 3; | ||||||
1535 | case AsmToken::Greater: | ||||||
1536 | Kind = MCBinaryExpr::GT; | ||||||
1537 | return 3; | ||||||
1538 | case AsmToken::GreaterEqual: | ||||||
1539 | Kind = MCBinaryExpr::GTE; | ||||||
1540 | return 3; | ||||||
1541 | |||||||
1542 | // Intermediate Precedence: <<, >> | ||||||
1543 | case AsmToken::LessLess: | ||||||
1544 | Kind = MCBinaryExpr::Shl; | ||||||
1545 | return 4; | ||||||
1546 | case AsmToken::GreaterGreater: | ||||||
1547 | Kind = ShouldUseLogicalShr ? MCBinaryExpr::LShr : MCBinaryExpr::AShr; | ||||||
1548 | return 4; | ||||||
1549 | |||||||
1550 | // High Intermediate Precedence: +, - | ||||||
1551 | case AsmToken::Plus: | ||||||
1552 | Kind = MCBinaryExpr::Add; | ||||||
1553 | return 5; | ||||||
1554 | case AsmToken::Minus: | ||||||
1555 | Kind = MCBinaryExpr::Sub; | ||||||
1556 | return 5; | ||||||
1557 | |||||||
1558 | // Highest Precedence: *, /, % | ||||||
1559 | case AsmToken::Star: | ||||||
1560 | Kind = MCBinaryExpr::Mul; | ||||||
1561 | return 6; | ||||||
1562 | case AsmToken::Slash: | ||||||
1563 | Kind = MCBinaryExpr::Div; | ||||||
1564 | return 6; | ||||||
1565 | case AsmToken::Percent: | ||||||
1566 | Kind = MCBinaryExpr::Mod; | ||||||
1567 | return 6; | ||||||
1568 | } | ||||||
1569 | } | ||||||
1570 | |||||||
1571 | static unsigned getGNUBinOpPrecedence(const MCAsmInfo &MAI, | ||||||
1572 | AsmToken::TokenKind K, | ||||||
1573 | MCBinaryExpr::Opcode &Kind, | ||||||
1574 | bool ShouldUseLogicalShr) { | ||||||
1575 | switch (K) { | ||||||
1576 | default: | ||||||
1577 | return 0; // not a binop. | ||||||
1578 | |||||||
1579 | // Lowest Precedence: &&, || | ||||||
1580 | case AsmToken::AmpAmp: | ||||||
1581 | Kind = MCBinaryExpr::LAnd; | ||||||
1582 | return 2; | ||||||
1583 | case AsmToken::PipePipe: | ||||||
1584 | Kind = MCBinaryExpr::LOr; | ||||||
1585 | return 1; | ||||||
1586 | |||||||
1587 | // Low Precedence: ==, !=, <>, <, <=, >, >= | ||||||
1588 | case AsmToken::EqualEqual: | ||||||
1589 | Kind = MCBinaryExpr::EQ; | ||||||
1590 | return 3; | ||||||
1591 | case AsmToken::ExclaimEqual: | ||||||
1592 | case AsmToken::LessGreater: | ||||||
1593 | Kind = MCBinaryExpr::NE; | ||||||
1594 | return 3; | ||||||
1595 | case AsmToken::Less: | ||||||
1596 | Kind = MCBinaryExpr::LT; | ||||||
1597 | return 3; | ||||||
1598 | case AsmToken::LessEqual: | ||||||
1599 | Kind = MCBinaryExpr::LTE; | ||||||
1600 | return 3; | ||||||
1601 | case AsmToken::Greater: | ||||||
1602 | Kind = MCBinaryExpr::GT; | ||||||
1603 | return 3; | ||||||
1604 | case AsmToken::GreaterEqual: | ||||||
1605 | Kind = MCBinaryExpr::GTE; | ||||||
1606 | return 3; | ||||||
1607 | |||||||
1608 | // Low Intermediate Precedence: +, - | ||||||
1609 | case AsmToken::Plus: | ||||||
1610 | Kind = MCBinaryExpr::Add; | ||||||
1611 | return 4; | ||||||
1612 | case AsmToken::Minus: | ||||||
1613 | Kind = MCBinaryExpr::Sub; | ||||||
1614 | return 4; | ||||||
1615 | |||||||
1616 | // High Intermediate Precedence: |, !, &, ^ | ||||||
1617 | // | ||||||
1618 | case AsmToken::Pipe: | ||||||
1619 | Kind = MCBinaryExpr::Or; | ||||||
1620 | return 5; | ||||||
1621 | case AsmToken::Exclaim: | ||||||
1622 | // Hack to support ARM compatible aliases (implied 'sp' operand in 'srs*' | ||||||
1623 | // instructions like 'srsda #31!') and not parse ! as an infix operator. | ||||||
1624 | if (MAI.getCommentString() == "@") | ||||||
1625 | return 0; | ||||||
1626 | Kind = MCBinaryExpr::OrNot; | ||||||
1627 | return 5; | ||||||
1628 | case AsmToken::Caret: | ||||||
1629 | Kind = MCBinaryExpr::Xor; | ||||||
1630 | return 5; | ||||||
1631 | case AsmToken::Amp: | ||||||
1632 | Kind = MCBinaryExpr::And; | ||||||
1633 | return 5; | ||||||
1634 | |||||||
1635 | // Highest Precedence: *, /, %, <<, >> | ||||||
1636 | case AsmToken::Star: | ||||||
1637 | Kind = MCBinaryExpr::Mul; | ||||||
1638 | return 6; | ||||||
1639 | case AsmToken::Slash: | ||||||
1640 | Kind = MCBinaryExpr::Div; | ||||||
1641 | return 6; | ||||||
1642 | case AsmToken::Percent: | ||||||
1643 | Kind = MCBinaryExpr::Mod; | ||||||
1644 | return 6; | ||||||
1645 | case AsmToken::LessLess: | ||||||
1646 | Kind = MCBinaryExpr::Shl; | ||||||
1647 | return 6; | ||||||
1648 | case AsmToken::GreaterGreater: | ||||||
1649 | Kind = ShouldUseLogicalShr ? MCBinaryExpr::LShr : MCBinaryExpr::AShr; | ||||||
1650 | return 6; | ||||||
1651 | } | ||||||
1652 | } | ||||||
1653 | |||||||
1654 | unsigned AsmParser::getBinOpPrecedence(AsmToken::TokenKind K, | ||||||
1655 | MCBinaryExpr::Opcode &Kind) { | ||||||
1656 | bool ShouldUseLogicalShr = MAI.shouldUseLogicalShr(); | ||||||
1657 | return IsDarwin ? getDarwinBinOpPrecedence(K, Kind, ShouldUseLogicalShr) | ||||||
1658 | : getGNUBinOpPrecedence(MAI, K, Kind, ShouldUseLogicalShr); | ||||||
1659 | } | ||||||
1660 | |||||||
1661 | /// Parse all binary operators with precedence >= 'Precedence'. | ||||||
1662 | /// Res contains the LHS of the expression on input. | ||||||
1663 | bool AsmParser::parseBinOpRHS(unsigned Precedence, const MCExpr *&Res, | ||||||
1664 | SMLoc &EndLoc) { | ||||||
1665 | SMLoc StartLoc = Lexer.getLoc(); | ||||||
1666 | while (true) { | ||||||
1667 | MCBinaryExpr::Opcode Kind = MCBinaryExpr::Add; | ||||||
1668 | unsigned TokPrec = getBinOpPrecedence(Lexer.getKind(), Kind); | ||||||
1669 | |||||||
1670 | // If the next token is lower precedence than we are allowed to eat, return | ||||||
1671 | // successfully with what we ate already. | ||||||
1672 | if (TokPrec < Precedence) | ||||||
1673 | return false; | ||||||
1674 | |||||||
1675 | Lex(); | ||||||
1676 | |||||||
1677 | // Eat the next primary expression. | ||||||
1678 | const MCExpr *RHS; | ||||||
1679 | if (getTargetParser().parsePrimaryExpr(RHS, EndLoc)) | ||||||
1680 | return true; | ||||||
1681 | |||||||
1682 | // If BinOp binds less tightly with RHS than the operator after RHS, let | ||||||
1683 | // the pending operator take RHS as its LHS. | ||||||
1684 | MCBinaryExpr::Opcode Dummy; | ||||||
1685 | unsigned NextTokPrec = getBinOpPrecedence(Lexer.getKind(), Dummy); | ||||||
1686 | if (TokPrec < NextTokPrec && parseBinOpRHS(TokPrec + 1, RHS, EndLoc)) | ||||||
1687 | return true; | ||||||
1688 | |||||||
1689 | // Merge LHS and RHS according to operator. | ||||||
1690 | Res = MCBinaryExpr::create(Kind, Res, RHS, getContext(), StartLoc); | ||||||
1691 | } | ||||||
1692 | } | ||||||
1693 | |||||||
1694 | /// ParseStatement: | ||||||
1695 | /// ::= EndOfStatement | ||||||
1696 | /// ::= Label* Directive ...Operands... EndOfStatement | ||||||
1697 | /// ::= Label* Identifier OperandList* EndOfStatement | ||||||
1698 | bool AsmParser::parseStatement(ParseStatementInfo &Info, | ||||||
1699 | MCAsmParserSemaCallback *SI) { | ||||||
1700 | assert(!hasPendingError() && "parseStatement started with pending error")((!hasPendingError() && "parseStatement started with pending error" ) ? static_cast<void> (0) : __assert_fail ("!hasPendingError() && \"parseStatement started with pending error\"" , "/build/llvm-toolchain-snapshot-13~++20210306111116+7ae191f59f0f/llvm/lib/MC/MCParser/AsmParser.cpp" , 1700, __PRETTY_FUNCTION__)); | ||||||
| |||||||
1701 | // Eat initial spaces and comments | ||||||
1702 | while (Lexer.is(AsmToken::Space)) | ||||||
1703 | Lex(); | ||||||
1704 | if (Lexer.is(AsmToken::EndOfStatement)) { | ||||||
1705 | // if this is a line comment we can drop it safely | ||||||
1706 | if (getTok().getString().empty() || getTok().getString().front() == '\r' || | ||||||
1707 | getTok().getString().front() == '\n') | ||||||
1708 | Out.AddBlankLine(); | ||||||
1709 | Lex(); | ||||||
1710 | return false; | ||||||
1711 | } | ||||||
1712 | // Statements always start with an identifier. | ||||||
1713 | AsmToken ID = getTok(); | ||||||
1714 | SMLoc IDLoc = ID.getLoc(); | ||||||
1715 | StringRef IDVal; | ||||||
1716 | int64_t LocalLabelVal = -1; | ||||||
1717 | StartTokLoc = ID.getLoc(); | ||||||
1718 | if (Lexer.is(AsmToken::HashDirective)) | ||||||
1719 | return parseCppHashLineFilenameComment(IDLoc, | ||||||
1720 | !isInsideMacroInstantiation()); | ||||||
1721 | |||||||
1722 | // Allow an integer followed by a ':' as a directional local label. | ||||||
1723 | if (Lexer.is(AsmToken::Integer)) { | ||||||
1724 | LocalLabelVal = getTok().getIntVal(); | ||||||
1725 | if (LocalLabelVal < 0) { | ||||||
1726 | if (!TheCondState.Ignore) { | ||||||
1727 | Lex(); // always eat a token | ||||||
1728 | return Error(IDLoc, "unexpected token at start of statement"); | ||||||
1729 | } | ||||||
1730 | IDVal = ""; | ||||||
1731 | } else { | ||||||
1732 | IDVal = getTok().getString(); | ||||||
1733 | Lex(); // Consume the integer token to be used as an identifier token. | ||||||
1734 | if (Lexer.getKind() != AsmToken::Colon) { | ||||||
1735 | if (!TheCondState.Ignore) { | ||||||
1736 | Lex(); // always eat a token | ||||||
1737 | return Error(IDLoc, "unexpected token at start of statement"); | ||||||
1738 | } | ||||||
1739 | } | ||||||
1740 | } | ||||||
1741 | } else if (Lexer.is(AsmToken::Dot)) { | ||||||
1742 | // Treat '.' as a valid identifier in this context. | ||||||
1743 | Lex(); | ||||||
1744 | IDVal = "."; | ||||||
1745 | } else if (Lexer.is(AsmToken::LCurly)) { | ||||||
1746 | // Treat '{' as a valid identifier in this context. | ||||||
1747 | Lex(); | ||||||
1748 | IDVal = "{"; | ||||||
1749 | |||||||
1750 | } else if (Lexer.is(AsmToken::RCurly)) { | ||||||
1751 | // Treat '}' as a valid identifier in this context. | ||||||
1752 | Lex(); | ||||||
1753 | IDVal = "}"; | ||||||
1754 | } else if (Lexer.is(AsmToken::Star) && | ||||||
1755 | getTargetParser().starIsStartOfStatement()) { | ||||||
1756 | // Accept '*' as a valid start of statement. | ||||||
1757 | Lex(); | ||||||
1758 | IDVal = "*"; | ||||||
1759 | } else if (parseIdentifier(IDVal)) { | ||||||
1760 | if (!TheCondState.Ignore) { | ||||||
1761 | Lex(); // always eat a token | ||||||
1762 | return Error(IDLoc, "unexpected token at start of statement"); | ||||||
1763 | } | ||||||
1764 | IDVal = ""; | ||||||
1765 | } | ||||||
1766 | |||||||
1767 | // Handle conditional assembly here before checking for skipping. We | ||||||
1768 | // have to do this so that .endif isn't skipped in a ".if 0" block for | ||||||
1769 | // example. | ||||||
1770 | StringMap<DirectiveKind>::const_iterator DirKindIt = | ||||||
1771 | DirectiveKindMap.find(IDVal.lower()); | ||||||
1772 | DirectiveKind DirKind = (DirKindIt == DirectiveKindMap.end()) | ||||||
1773 | |||||||
1774 | ? DK_NO_DIRECTIVE | ||||||
1775 | : DirKindIt->getValue(); | ||||||
1776 | switch (DirKind) { | ||||||
1777 | default: | ||||||
1778 | break; | ||||||
1779 | case DK_IF: | ||||||
1780 | case DK_IFEQ: | ||||||
1781 | case DK_IFGE: | ||||||
1782 | case DK_IFGT: | ||||||
1783 | case DK_IFLE: | ||||||
1784 | case DK_IFLT: | ||||||
1785 | case DK_IFNE: | ||||||
1786 | return parseDirectiveIf(IDLoc, DirKind); | ||||||
1787 | case DK_IFB: | ||||||
1788 | return parseDirectiveIfb(IDLoc, true); | ||||||
1789 | case DK_IFNB: | ||||||
1790 | return parseDirectiveIfb(IDLoc, false); | ||||||
1791 | case DK_IFC: | ||||||
1792 | return parseDirectiveIfc(IDLoc, true); | ||||||
1793 | case DK_IFEQS: | ||||||
1794 | return parseDirectiveIfeqs(IDLoc, true); | ||||||
1795 | case DK_IFNC: | ||||||
1796 | return parseDirectiveIfc(IDLoc, false); | ||||||
1797 | case DK_IFNES: | ||||||
1798 | return parseDirectiveIfeqs(IDLoc, false); | ||||||
1799 | case DK_IFDEF: | ||||||
1800 | return parseDirectiveIfdef(IDLoc, true); | ||||||
1801 | case DK_IFNDEF: | ||||||
1802 | case DK_IFNOTDEF: | ||||||
1803 | return parseDirectiveIfdef(IDLoc, false); | ||||||
1804 | case DK_ELSEIF: | ||||||
1805 | return parseDirectiveElseIf(IDLoc); | ||||||
1806 | case DK_ELSE: | ||||||
1807 | return parseDirectiveElse(IDLoc); | ||||||
1808 | case DK_ENDIF: | ||||||
1809 | return parseDirectiveEndIf(IDLoc); | ||||||
1810 | } | ||||||
1811 | |||||||
1812 | // Ignore the statement if in the middle of inactive conditional | ||||||
1813 | // (e.g. ".if 0"). | ||||||
1814 | if (TheCondState.Ignore) { | ||||||
1815 | eatToEndOfStatement(); | ||||||
1816 | return false; | ||||||
1817 | } | ||||||
1818 | |||||||
1819 | // FIXME: Recurse on local labels? | ||||||
1820 | |||||||
1821 | // See what kind of statement we have. | ||||||
1822 | switch (Lexer.getKind()) { | ||||||
1823 | case AsmToken::Colon: { | ||||||
1824 | if (!getTargetParser().isLabel(ID)) | ||||||
1825 | break; | ||||||
1826 | if (checkForValidSection()) | ||||||
1827 | return true; | ||||||
1828 | |||||||
1829 | // identifier ':' -> Label. | ||||||
1830 | Lex(); | ||||||
1831 | |||||||
1832 | // Diagnose attempt to use '.' as a label. | ||||||
1833 | if (IDVal == ".") | ||||||
1834 | return Error(IDLoc, "invalid use of pseudo-symbol '.' as a label"); | ||||||
1835 | |||||||
1836 | // Diagnose attempt to use a variable as a label. | ||||||
1837 | // | ||||||
1838 | // FIXME: Diagnostics. Note the location of the definition as a label. | ||||||
1839 | // FIXME: This doesn't diagnose assignment to a symbol which has been | ||||||
1840 | // implicitly marked as external. | ||||||
1841 | MCSymbol *Sym; | ||||||
1842 | if (LocalLabelVal == -1) { | ||||||
1843 | if (ParsingMSInlineAsm && SI) { | ||||||
1844 | StringRef RewrittenLabel = | ||||||
1845 | SI->LookupInlineAsmLabel(IDVal, getSourceManager(), IDLoc, true); | ||||||
1846 | assert(!RewrittenLabel.empty() &&((!RewrittenLabel.empty() && "We should have an internal name here." ) ? static_cast<void> (0) : __assert_fail ("!RewrittenLabel.empty() && \"We should have an internal name here.\"" , "/build/llvm-toolchain-snapshot-13~++20210306111116+7ae191f59f0f/llvm/lib/MC/MCParser/AsmParser.cpp" , 1847, __PRETTY_FUNCTION__)) | ||||||
1847 | "We should have an internal name here.")((!RewrittenLabel.empty() && "We should have an internal name here." ) ? static_cast<void> (0) : __assert_fail ("!RewrittenLabel.empty() && \"We should have an internal name here.\"" , "/build/llvm-toolchain-snapshot-13~++20210306111116+7ae191f59f0f/llvm/lib/MC/MCParser/AsmParser.cpp" , 1847, __PRETTY_FUNCTION__)); | ||||||
1848 | Info.AsmRewrites->emplace_back(AOK_Label, IDLoc, IDVal.size(), | ||||||
1849 | RewrittenLabel); | ||||||
1850 | IDVal = RewrittenLabel; | ||||||
1851 | } | ||||||
1852 | Sym = getContext().getOrCreateSymbol(IDVal); | ||||||
1853 | } else | ||||||
1854 | Sym = Ctx.createDirectionalLocalSymbol(LocalLabelVal); | ||||||
1855 | // End of Labels should be treated as end of line for lexing | ||||||
1856 | // purposes but that information is not available to the Lexer who | ||||||
1857 | // does not understand Labels. This may cause us to see a Hash | ||||||
1858 | // here instead of a preprocessor line comment. | ||||||
1859 | if (getTok().is(AsmToken::Hash)) { | ||||||
1860 | StringRef CommentStr = parseStringToEndOfStatement(); | ||||||
1861 | Lexer.Lex(); | ||||||
1862 | Lexer.UnLex(AsmToken(AsmToken::EndOfStatement, CommentStr)); | ||||||
1863 | } | ||||||
1864 | |||||||
1865 | // Consume any end of statement token, if present, to avoid spurious | ||||||
1866 | // AddBlankLine calls(). | ||||||
1867 | if (getTok().is(AsmToken::EndOfStatement)) { | ||||||
1868 | Lex(); | ||||||
1869 | } | ||||||
1870 | |||||||
1871 | getTargetParser().doBeforeLabelEmit(Sym); | ||||||
1872 | |||||||
1873 | // Emit the label. | ||||||
1874 | if (!getTargetParser().isParsingMSInlineAsm()) | ||||||
1875 | Out.emitLabel(Sym, IDLoc); | ||||||
1876 | |||||||
1877 | // If we are generating dwarf for assembly source files then gather the | ||||||
1878 | // info to make a dwarf label entry for this label if needed. | ||||||
1879 | if (enabledGenDwarfForAssembly()) | ||||||
1880 | MCGenDwarfLabelEntry::Make(Sym, &getStreamer(), getSourceManager(), | ||||||
1881 | IDLoc); | ||||||
1882 | |||||||
1883 | getTargetParser().onLabelParsed(Sym); | ||||||
1884 | |||||||
1885 | return false; | ||||||
1886 | } | ||||||
1887 | |||||||
1888 | case AsmToken::Equal: | ||||||
1889 | if (!getTargetParser().equalIsAsmAssignment()) | ||||||
1890 | break; | ||||||
1891 | // identifier '=' ... -> assignment statement | ||||||
1892 | Lex(); | ||||||
1893 | |||||||
1894 | return parseAssignment(IDVal, true); | ||||||
1895 | |||||||
1896 | default: // Normal instruction or directive. | ||||||
1897 | break; | ||||||
1898 | } | ||||||
1899 | |||||||
1900 | // If macros are enabled, check to see if this is a macro instantiation. | ||||||
1901 | if (areMacrosEnabled()) | ||||||
1902 | if (const MCAsmMacro *M = getContext().lookupMacro(IDVal)) { | ||||||
1903 | return handleMacroEntry(M, IDLoc); | ||||||
1904 | } | ||||||
1905 | |||||||
1906 | // Otherwise, we have a normal instruction or directive. | ||||||
1907 | |||||||
1908 | // Directives start with "." | ||||||
1909 | if (IDVal.startswith(".") && IDVal != ".") { | ||||||
1910 | // There are several entities interested in parsing directives: | ||||||
1911 | // | ||||||
1912 | // 1. The target-specific assembly parser. Some directives are target | ||||||
1913 | // specific or may potentially behave differently on certain targets. | ||||||
1914 | // 2. Asm parser extensions. For example, platform-specific parsers | ||||||
1915 | // (like the ELF parser) register themselves as extensions. | ||||||
1916 | // 3. The generic directive parser implemented by this class. These are | ||||||
1917 | // all the directives that behave in a target and platform independent | ||||||
1918 | // manner, or at least have a default behavior that's shared between | ||||||
1919 | // all targets and platforms. | ||||||
1920 | |||||||
1921 | getTargetParser().flushPendingInstructions(getStreamer()); | ||||||
1922 | |||||||
1923 | SMLoc StartTokLoc = getTok().getLoc(); | ||||||
1924 | bool TPDirectiveReturn = getTargetParser().ParseDirective(ID); | ||||||
1925 | |||||||
1926 | if (hasPendingError()) | ||||||
1927 | return true; | ||||||
1928 | // Currently the return value should be true if we are | ||||||
1929 | // uninterested but as this is at odds with the standard parsing | ||||||
1930 | // convention (return true = error) we have instances of a parsed | ||||||
1931 | // directive that fails returning true as an error. Catch these | ||||||
1932 | // cases as best as possible errors here. | ||||||
1933 | if (TPDirectiveReturn && StartTokLoc != getTok().getLoc()) | ||||||
1934 | return true; | ||||||
1935 | // Return if we did some parsing or believe we succeeded. | ||||||
1936 | if (!TPDirectiveReturn
| ||||||
1937 | return false; | ||||||
1938 | |||||||
1939 | // Next, check the extension directive map to see if any extension has | ||||||
1940 | // registered itself to parse this directive. | ||||||
1941 | std::pair<MCAsmParserExtension *, DirectiveHandler> Handler = | ||||||
1942 | ExtensionDirectiveMap.lookup(IDVal); | ||||||
1943 | if (Handler.first) | ||||||
1944 | return (*Handler.second)(Handler.first, IDVal, IDLoc); | ||||||
1945 | |||||||
1946 | // Finally, if no one else is interested in this directive, it must be | ||||||
1947 | // generic and familiar to this class. | ||||||
1948 | switch (DirKind) { | ||||||
1949 | default: | ||||||
1950 | break; | ||||||
1951 | case DK_SET: | ||||||
1952 | case DK_EQU: | ||||||
1953 | return parseDirectiveSet(IDVal, true); | ||||||
1954 | case DK_EQUIV: | ||||||
1955 | return parseDirectiveSet(IDVal, false); | ||||||
1956 | case DK_ASCII: | ||||||
1957 | return parseDirectiveAscii(IDVal, false); | ||||||
1958 | case DK_ASCIZ: | ||||||
1959 | case DK_STRING: | ||||||
1960 | return parseDirectiveAscii(IDVal, true); | ||||||
1961 | case DK_BYTE: | ||||||
1962 | case DK_DC_B: | ||||||
1963 | return parseDirectiveValue(IDVal, 1); | ||||||
1964 | case DK_DC: | ||||||
1965 | case DK_DC_W: | ||||||
1966 | case DK_SHORT: | ||||||
1967 | case DK_VALUE: | ||||||
1968 | case DK_2BYTE: | ||||||
1969 | return parseDirectiveValue(IDVal, 2); | ||||||
1970 | case DK_LONG: | ||||||
1971 | case DK_INT: | ||||||
1972 | case DK_4BYTE: | ||||||
1973 | case DK_DC_L: | ||||||
1974 | return parseDirectiveValue(IDVal, 4); | ||||||
1975 | case DK_QUAD: | ||||||
1976 | case DK_8BYTE: | ||||||
1977 | return parseDirectiveValue(IDVal, 8); | ||||||
1978 | case DK_DC_A: | ||||||
1979 | return parseDirectiveValue( | ||||||
1980 | IDVal, getContext().getAsmInfo()->getCodePointerSize()); | ||||||
1981 | case DK_OCTA: | ||||||
1982 | return parseDirectiveOctaValue(IDVal); | ||||||
1983 | case DK_SINGLE: | ||||||
1984 | case DK_FLOAT: | ||||||
1985 | case DK_DC_S: | ||||||
1986 | return parseDirectiveRealValue(IDVal, APFloat::IEEEsingle()); | ||||||
1987 | case DK_DOUBLE: | ||||||
1988 | case DK_DC_D: | ||||||
1989 | return parseDirectiveRealValue(IDVal, APFloat::IEEEdouble()); | ||||||
1990 | case DK_ALIGN: { | ||||||
1991 | bool IsPow2 = !getContext().getAsmInfo()->getAlignmentIsInBytes(); | ||||||
1992 | return parseDirectiveAlign(IsPow2, /*ExprSize=*/1); | ||||||
1993 | } | ||||||
1994 | case DK_ALIGN32: { | ||||||
1995 | bool IsPow2 = !getContext().getAsmInfo()->getAlignmentIsInBytes(); | ||||||
1996 | return parseDirectiveAlign(IsPow2, /*ExprSize=*/4); | ||||||
1997 | } | ||||||
1998 | case DK_BALIGN: | ||||||
1999 | return parseDirectiveAlign(/*IsPow2=*/false, /*ExprSize=*/1); | ||||||
2000 | case DK_BALIGNW: | ||||||
2001 | return parseDirectiveAlign(/*IsPow2=*/false, /*ExprSize=*/2); | ||||||
2002 | case DK_BALIGNL: | ||||||
2003 | return parseDirectiveAlign(/*IsPow2=*/false, /*ExprSize=*/4); | ||||||
2004 | case DK_P2ALIGN: | ||||||
2005 | return parseDirectiveAlign(/*IsPow2=*/true, /*ExprSize=*/1); | ||||||
2006 | case DK_P2ALIGNW: | ||||||
2007 | return parseDirectiveAlign(/*IsPow2=*/true, /*ExprSize=*/2); | ||||||
2008 | case DK_P2ALIGNL: | ||||||
2009 | return parseDirectiveAlign(/*IsPow2=*/true, /*ExprSize=*/4); | ||||||
2010 | case DK_ORG: | ||||||
2011 | return parseDirectiveOrg(); | ||||||
2012 | case DK_FILL: | ||||||
2013 | return parseDirectiveFill(); | ||||||
2014 | case DK_ZERO: | ||||||
2015 | return parseDirectiveZero(); | ||||||
2016 | case DK_EXTERN: | ||||||
2017 | eatToEndOfStatement(); // .extern is the default, ignore it. | ||||||
2018 | return false; | ||||||
2019 | case DK_GLOBL: | ||||||
2020 | case DK_GLOBAL: | ||||||
2021 | return parseDirectiveSymbolAttribute(MCSA_Global); | ||||||
2022 | case DK_LAZY_REFERENCE: | ||||||
2023 | return parseDirectiveSymbolAttribute(MCSA_LazyReference); | ||||||
2024 | case DK_NO_DEAD_STRIP: | ||||||
2025 | return parseDirectiveSymbolAttribute(MCSA_NoDeadStrip); | ||||||
2026 | case DK_SYMBOL_RESOLVER: | ||||||
2027 | return parseDirectiveSymbolAttribute(MCSA_SymbolResolver); | ||||||
2028 | case DK_PRIVATE_EXTERN: | ||||||
2029 | return parseDirectiveSymbolAttribute(MCSA_PrivateExtern); | ||||||
2030 | case DK_REFERENCE: | ||||||
2031 | return parseDirectiveSymbolAttribute(MCSA_Reference); | ||||||
2032 | case DK_WEAK_DEFINITION: | ||||||
2033 | return parseDirectiveSymbolAttribute(MCSA_WeakDefinition); | ||||||
2034 | case DK_WEAK_REFERENCE: | ||||||
2035 | return parseDirectiveSymbolAttribute(MCSA_WeakReference); | ||||||
2036 | case DK_WEAK_DEF_CAN_BE_HIDDEN: | ||||||
2037 | return parseDirectiveSymbolAttribute(MCSA_WeakDefAutoPrivate); | ||||||
2038 | case DK_COLD: | ||||||
2039 | return parseDirectiveSymbolAttribute(MCSA_Cold); | ||||||
2040 | case DK_COMM: | ||||||
2041 | case DK_COMMON: | ||||||
2042 | return parseDirectiveComm(/*IsLocal=*/false); | ||||||
2043 | case DK_LCOMM: | ||||||
2044 | return parseDirectiveComm(/*IsLocal=*/true); | ||||||
2045 | case DK_ABORT: | ||||||
2046 | return parseDirectiveAbort(); | ||||||
2047 | case DK_INCLUDE: | ||||||
2048 | return parseDirectiveInclude(); | ||||||
2049 | case DK_INCBIN: | ||||||
2050 | return parseDirectiveIncbin(); | ||||||
2051 | case DK_CODE16: | ||||||
2052 | case DK_CODE16GCC: | ||||||
2053 | return TokError(Twine(IDVal) + | ||||||
2054 | " not currently supported for this target"); | ||||||
2055 | case DK_REPT: | ||||||
2056 | return parseDirectiveRept(IDLoc, IDVal); | ||||||
2057 | case DK_IRP: | ||||||
2058 | return parseDirectiveIrp(IDLoc); | ||||||
2059 | case DK_IRPC: | ||||||
2060 | return parseDirectiveIrpc(IDLoc); | ||||||
2061 | case DK_ENDR: | ||||||
2062 | return parseDirectiveEndr(IDLoc); | ||||||
2063 | case DK_BUNDLE_ALIGN_MODE: | ||||||
2064 | return parseDirectiveBundleAlignMode(); | ||||||
2065 | case DK_BUNDLE_LOCK: | ||||||
2066 | return parseDirectiveBundleLock(); | ||||||
2067 | case DK_BUNDLE_UNLOCK: | ||||||
2068 | return parseDirectiveBundleUnlock(); | ||||||
2069 | case DK_SLEB128: | ||||||
2070 | return parseDirectiveLEB128(true); | ||||||
2071 | case DK_ULEB128: | ||||||
2072 | return parseDirectiveLEB128(false); | ||||||
2073 | case DK_SPACE: | ||||||
2074 | case DK_SKIP: | ||||||
2075 | return parseDirectiveSpace(IDVal); | ||||||
2076 | case DK_FILE: | ||||||
2077 | return parseDirectiveFile(IDLoc); | ||||||
2078 | case DK_LINE: | ||||||
2079 | return parseDirectiveLine(); | ||||||
2080 | case DK_LOC: | ||||||
2081 | return parseDirectiveLoc(); | ||||||
2082 | case DK_STABS: | ||||||
2083 | return parseDirectiveStabs(); | ||||||
2084 | case DK_CV_FILE: | ||||||
2085 | return parseDirectiveCVFile(); | ||||||
2086 | case DK_CV_FUNC_ID: | ||||||
2087 | return parseDirectiveCVFuncId(); | ||||||
2088 | case DK_CV_INLINE_SITE_ID: | ||||||
2089 | return parseDirectiveCVInlineSiteId(); | ||||||
2090 | case DK_CV_LOC: | ||||||
2091 | return parseDirectiveCVLoc(); | ||||||
2092 | case DK_CV_LINETABLE: | ||||||
2093 | return parseDirectiveCVLinetable(); | ||||||
2094 | case DK_CV_INLINE_LINETABLE: | ||||||
2095 | return parseDirectiveCVInlineLinetable(); | ||||||
2096 | case DK_CV_DEF_RANGE: | ||||||
2097 | return parseDirectiveCVDefRange(); | ||||||
2098 | case DK_CV_STRING: | ||||||
2099 | return parseDirectiveCVString(); | ||||||
2100 | case DK_CV_STRINGTABLE: | ||||||
2101 | return parseDirectiveCVStringTable(); | ||||||
2102 | case DK_CV_FILECHECKSUMS: | ||||||
2103 | return parseDirectiveCVFileChecksums(); | ||||||
2104 | case DK_CV_FILECHECKSUM_OFFSET: | ||||||
2105 | return parseDirectiveCVFileChecksumOffset(); | ||||||
2106 | case DK_CV_FPO_DATA: | ||||||
2107 | return parseDirectiveCVFPOData(); | ||||||
2108 | case DK_CFI_SECTIONS: | ||||||
2109 | return parseDirectiveCFISections(); | ||||||
2110 | case DK_CFI_STARTPROC: | ||||||
2111 | return parseDirectiveCFIStartProc(); | ||||||
2112 | case DK_CFI_ENDPROC: | ||||||
2113 | return parseDirectiveCFIEndProc(); | ||||||
2114 | case DK_CFI_DEF_CFA: | ||||||
2115 | return parseDirectiveCFIDefCfa(IDLoc); | ||||||
2116 | case DK_CFI_DEF_CFA_OFFSET: | ||||||
2117 | return parseDirectiveCFIDefCfaOffset(); | ||||||
2118 | case DK_CFI_ADJUST_CFA_OFFSET: | ||||||
2119 | return parseDirectiveCFIAdjustCfaOffset(); | ||||||
2120 | case DK_CFI_DEF_CFA_REGISTER: | ||||||
2121 | return parseDirectiveCFIDefCfaRegister(IDLoc); | ||||||
2122 | case DK_CFI_OFFSET: | ||||||
2123 | return parseDirectiveCFIOffset(IDLoc); | ||||||
2124 | case DK_CFI_REL_OFFSET: | ||||||
2125 | return parseDirectiveCFIRelOffset(IDLoc); | ||||||
2126 | case DK_CFI_PERSONALITY: | ||||||
2127 | return parseDirectiveCFIPersonalityOrLsda(true); | ||||||
2128 | case DK_CFI_LSDA: | ||||||
2129 | return parseDirectiveCFIPersonalityOrLsda(false); | ||||||
2130 | case DK_CFI_REMEMBER_STATE: | ||||||
2131 | return parseDirectiveCFIRememberState(); | ||||||
2132 | case DK_CFI_RESTORE_STATE: | ||||||
2133 | return parseDirectiveCFIRestoreState(); | ||||||
2134 | case DK_CFI_SAME_VALUE: | ||||||
2135 | return parseDirectiveCFISameValue(IDLoc); | ||||||
2136 | case DK_CFI_RESTORE: | ||||||
2137 | return parseDirectiveCFIRestore(IDLoc); | ||||||
2138 | case DK_CFI_ESCAPE: | ||||||
2139 | return parseDirectiveCFIEscape(); | ||||||
2140 | case DK_CFI_RETURN_COLUMN: | ||||||
2141 | return parseDirectiveCFIReturnColumn(IDLoc); | ||||||
2142 | case DK_CFI_SIGNAL_FRAME: | ||||||
2143 | return parseDirectiveCFISignalFrame(); | ||||||
2144 | case DK_CFI_UNDEFINED: | ||||||
2145 | return parseDirectiveCFIUndefined(IDLoc); | ||||||
2146 | case DK_CFI_REGISTER: | ||||||
2147 | return parseDirectiveCFIRegister(IDLoc); | ||||||
2148 | case DK_CFI_WINDOW_SAVE: | ||||||
2149 | return parseDirectiveCFIWindowSave(); | ||||||
2150 | case DK_MACROS_ON: | ||||||
2151 | case DK_MACROS_OFF: | ||||||
2152 | return parseDirectiveMacrosOnOff(IDVal); | ||||||
2153 | case DK_MACRO: | ||||||
2154 | return parseDirectiveMacro(IDLoc); | ||||||
2155 | case DK_ALTMACRO: | ||||||
2156 | case DK_NOALTMACRO: | ||||||
2157 | return parseDirectiveAltmacro(IDVal); | ||||||
2158 | case DK_EXITM: | ||||||
2159 | return parseDirectiveExitMacro(IDVal); | ||||||
2160 | case DK_ENDM: | ||||||
2161 | case DK_ENDMACRO: | ||||||
2162 | return parseDirectiveEndMacro(IDVal); | ||||||
2163 | case DK_PURGEM: | ||||||
2164 | return parseDirectivePurgeMacro(IDLoc); | ||||||
2165 | case DK_END: | ||||||
2166 | return parseDirectiveEnd(IDLoc); | ||||||
2167 | case DK_ERR: | ||||||
2168 | return parseDirectiveError(IDLoc, false); | ||||||
2169 | case DK_ERROR: | ||||||
2170 | return parseDirectiveError(IDLoc, true); | ||||||
2171 | case DK_WARNING: | ||||||
2172 | return parseDirectiveWarning(IDLoc); | ||||||
2173 | case DK_RELOC: | ||||||
2174 | return parseDirectiveReloc(IDLoc); | ||||||
2175 | case DK_DCB: | ||||||
2176 | case DK_DCB_W: | ||||||
2177 | return parseDirectiveDCB(IDVal, 2); | ||||||
2178 | case DK_DCB_B: | ||||||
2179 | return parseDirectiveDCB(IDVal, 1); | ||||||
2180 | case DK_DCB_D: | ||||||
2181 | return parseDirectiveRealDCB(IDVal, APFloat::IEEEdouble()); | ||||||
2182 | case DK_DCB_L: | ||||||
2183 | return parseDirectiveDCB(IDVal, 4); | ||||||
2184 | case DK_DCB_S: | ||||||
2185 | return parseDirectiveRealDCB(IDVal, APFloat::IEEEsingle()); | ||||||
2186 | case DK_DC_X: | ||||||
2187 | case DK_DCB_X: | ||||||
2188 | return TokError(Twine(IDVal) + | ||||||
2189 | " not currently supported for this target"); | ||||||
2190 | case DK_DS: | ||||||
2191 | case DK_DS_W: | ||||||
2192 | return parseDirectiveDS(IDVal, 2); | ||||||
2193 | case DK_DS_B: | ||||||
2194 | return parseDirectiveDS(IDVal, 1); | ||||||
2195 | case DK_DS_D: | ||||||
2196 | return parseDirectiveDS(IDVal, 8); | ||||||
2197 | case DK_DS_L: | ||||||
2198 | case DK_DS_S: | ||||||
2199 | return parseDirectiveDS(IDVal, 4); | ||||||
2200 | case DK_DS_P: | ||||||
2201 | case DK_DS_X: | ||||||
2202 | return parseDirectiveDS(IDVal, 12); | ||||||
2203 | case DK_PRINT: | ||||||
2204 | return parseDirectivePrint(IDLoc); | ||||||
2205 | case DK_ADDRSIG: | ||||||
2206 | return parseDirectiveAddrsig(); | ||||||
2207 | case DK_ADDRSIG_SYM: | ||||||
2208 | return parseDirectiveAddrsigSym(); | ||||||
2209 | case DK_PSEUDO_PROBE: | ||||||
2210 | return parseDirectivePseudoProbe(); | ||||||
2211 | } | ||||||
2212 | |||||||
2213 | return Error(IDLoc, "unknown directive"); | ||||||
2214 | } | ||||||
2215 | |||||||
2216 | // __asm _emit or __asm __emit | ||||||
2217 | if (ParsingMSInlineAsm && (IDVal == "_emit" || IDVal == "__emit" || | ||||||
2218 | IDVal == "_EMIT" || IDVal == "__EMIT")) | ||||||
2219 | return parseDirectiveMSEmit(IDLoc, Info, IDVal.size()); | ||||||
2220 | |||||||
2221 | // __asm align | ||||||
2222 | if (ParsingMSInlineAsm && (IDVal == "align" || IDVal == "ALIGN")) | ||||||
2223 | return parseDirectiveMSAlign(IDLoc, Info); | ||||||
2224 | |||||||
2225 | if (ParsingMSInlineAsm && (IDVal == "even" || IDVal == "EVEN")) | ||||||
2226 | Info.AsmRewrites->emplace_back(AOK_EVEN, IDLoc, 4); | ||||||
2227 | if (checkForValidSection()) | ||||||
2228 | return true; | ||||||
2229 | |||||||
2230 | // Canonicalize the opcode to lower case. | ||||||
2231 | std::string OpcodeStr = IDVal.lower(); | ||||||
2232 | ParseInstructionInfo IInfo(Info.AsmRewrites); | ||||||
2233 | bool ParseHadError = getTargetParser().ParseInstruction(IInfo, OpcodeStr, ID, | ||||||
2234 | Info.ParsedOperands); | ||||||
2235 | Info.ParseError = ParseHadError; | ||||||
2236 | |||||||
2237 | // Dump the parsed representation, if requested. | ||||||
2238 | if (getShowParsedOperands()) { | ||||||
2239 | SmallString<256> Str; | ||||||
2240 | raw_svector_ostream OS(Str); | ||||||
2241 | OS << "parsed instruction: ["; | ||||||
2242 | for (unsigned i = 0; i != Info.ParsedOperands.size(); ++i) { | ||||||
2243 | if (i != 0) | ||||||
2244 | OS << ", "; | ||||||
2245 | Info.ParsedOperands[i]->print(OS); | ||||||
2246 | } | ||||||
2247 | OS << "]"; | ||||||
2248 | |||||||
2249 | printMessage(IDLoc, SourceMgr::DK_Note, OS.str()); | ||||||
2250 | } | ||||||
2251 | |||||||
2252 | // Fail even if ParseInstruction erroneously returns false. | ||||||
2253 | if (hasPendingError() || ParseHadError) | ||||||
2254 | return true; | ||||||
2255 | |||||||
2256 | // If we are generating dwarf for the current section then generate a .loc | ||||||
2257 | // directive for the instruction. | ||||||
2258 | if (!ParseHadError && enabledGenDwarfForAssembly() && | ||||||
2259 | getContext().getGenDwarfSectionSyms().count( | ||||||
2260 | getStreamer().getCurrentSectionOnly())) { | ||||||
2261 | unsigned Line; | ||||||
2262 | if (ActiveMacros.empty()) | ||||||
2263 | Line = SrcMgr.FindLineNumber(IDLoc, CurBuffer); | ||||||
2264 | else | ||||||
2265 | Line = SrcMgr.FindLineNumber(ActiveMacros.front()->InstantiationLoc, | ||||||
2266 | ActiveMacros.front()->ExitBuffer); | ||||||
2267 | |||||||
2268 | // If we previously parsed a cpp hash file line comment then make sure the | ||||||
2269 | // current Dwarf File is for the CppHashFilename if not then emit the | ||||||
2270 | // Dwarf File table for it and adjust the line number for the .loc. | ||||||
2271 | if (!CppHashInfo.Filename.empty()) { | ||||||
2272 | unsigned FileNumber = getStreamer().emitDwarfFileDirective( | ||||||
2273 | 0, StringRef(), CppHashInfo.Filename); | ||||||
2274 | getContext().setGenDwarfFileNumber(FileNumber); | ||||||
2275 | |||||||
2276 | unsigned CppHashLocLineNo = | ||||||
2277 | SrcMgr.FindLineNumber(CppHashInfo.Loc, CppHashInfo.Buf); | ||||||
2278 | Line = CppHashInfo.LineNumber - 1 + (Line - CppHashLocLineNo); | ||||||
2279 | } | ||||||
2280 | |||||||
2281 | getStreamer().emitDwarfLocDirective( | ||||||
2282 | getContext().getGenDwarfFileNumber(), Line, 0, | ||||||
2283 | DWARF2_LINE_DEFAULT_IS_STMT1 ? DWARF2_FLAG_IS_STMT(1 << 0) : 0, 0, 0, | ||||||
2284 | StringRef()); | ||||||
2285 | } | ||||||
2286 | |||||||
2287 | // If parsing succeeded, match the instruction. | ||||||
2288 | if (!ParseHadError) { | ||||||
2289 | uint64_t ErrorInfo; | ||||||
2290 | if (getTargetParser().MatchAndEmitInstruction( | ||||||
2291 | IDLoc, Info.Opcode, Info.ParsedOperands, Out, ErrorInfo, | ||||||
2292 | getTargetParser().isParsingMSInlineAsm())) | ||||||
2293 | return true; | ||||||
2294 | } | ||||||
2295 | return false; | ||||||
2296 | } | ||||||
2297 | |||||||
2298 | // Parse and erase curly braces marking block start/end | ||||||
2299 | bool | ||||||
2300 | AsmParser::parseCurlyBlockScope(SmallVectorImpl<AsmRewrite> &AsmStrRewrites) { | ||||||
2301 | // Identify curly brace marking block start/end | ||||||
2302 | if (Lexer.isNot(AsmToken::LCurly) && Lexer.isNot(AsmToken::RCurly)) | ||||||
2303 | return false; | ||||||
2304 | |||||||
2305 | SMLoc StartLoc = Lexer.getLoc(); | ||||||
2306 | Lex(); // Eat the brace | ||||||
2307 | if (Lexer.is(AsmToken::EndOfStatement)) | ||||||
2308 | Lex(); // Eat EndOfStatement following the brace | ||||||
2309 | |||||||
2310 | // Erase the block start/end brace from the output asm string | ||||||
2311 | AsmStrRewrites.emplace_back(AOK_Skip, StartLoc, Lexer.getLoc().getPointer() - | ||||||
2312 | StartLoc.getPointer()); | ||||||
2313 | return true; | ||||||
2314 | } | ||||||
2315 | |||||||
2316 | /// parseCppHashLineFilenameComment as this: | ||||||
2317 | /// ::= # number "filename" | ||||||
2318 | bool AsmParser::parseCppHashLineFilenameComment(SMLoc L, bool SaveLocInfo) { | ||||||
2319 | Lex(); // Eat the hash token. | ||||||
2320 | // Lexer only ever emits HashDirective if it fully formed if it's | ||||||
2321 | // done the checking already so this is an internal error. | ||||||
2322 | assert(getTok().is(AsmToken::Integer) &&((getTok().is(AsmToken::Integer) && "Lexing Cpp line comment: Expected Integer" ) ? static_cast<void> (0) : __assert_fail ("getTok().is(AsmToken::Integer) && \"Lexing Cpp line comment: Expected Integer\"" , "/build/llvm-toolchain-snapshot-13~++20210306111116+7ae191f59f0f/llvm/lib/MC/MCParser/AsmParser.cpp" , 2323, __PRETTY_FUNCTION__)) | ||||||
2323 | "Lexing Cpp line comment: Expected Integer")((getTok().is(AsmToken::Integer) && "Lexing Cpp line comment: Expected Integer" ) ? static_cast<void> (0) : __assert_fail ("getTok().is(AsmToken::Integer) && \"Lexing Cpp line comment: Expected Integer\"" , "/build/llvm-toolchain-snapshot-13~++20210306111116+7ae191f59f0f/llvm/lib/MC/MCParser/AsmParser.cpp" , 2323, __PRETTY_FUNCTION__)); | ||||||
2324 | int64_t LineNumber = getTok().getIntVal(); | ||||||
2325 | Lex(); | ||||||
2326 | assert(getTok().is(AsmToken::String) &&((getTok().is(AsmToken::String) && "Lexing Cpp line comment: Expected String" ) ? static_cast<void> (0) : __assert_fail ("getTok().is(AsmToken::String) && \"Lexing Cpp line comment: Expected String\"" , "/build/llvm-toolchain-snapshot-13~++20210306111116+7ae191f59f0f/llvm/lib/MC/MCParser/AsmParser.cpp" , 2327, __PRETTY_FUNCTION__)) | ||||||
2327 | "Lexing Cpp line comment: Expected String")((getTok().is(AsmToken::String) && "Lexing Cpp line comment: Expected String" ) ? static_cast<void> (0) : __assert_fail ("getTok().is(AsmToken::String) && \"Lexing Cpp line comment: Expected String\"" , "/build/llvm-toolchain-snapshot-13~++20210306111116+7ae191f59f0f/llvm/lib/MC/MCParser/AsmParser.cpp" , 2327, __PRETTY_FUNCTION__)); | ||||||
2328 | StringRef Filename = getTok().getString(); | ||||||
2329 | Lex(); | ||||||
2330 | |||||||
2331 | if (!SaveLocInfo) | ||||||
2332 | return false; | ||||||
2333 | |||||||
2334 | // Get rid of the enclosing quotes. | ||||||
2335 | Filename = Filename.substr(1, Filename.size() - 2); | ||||||
2336 | |||||||
2337 | // Save the SMLoc, Filename and LineNumber for later use by diagnostics | ||||||
2338 | // and possibly DWARF file info. | ||||||
2339 | CppHashInfo.Loc = L; | ||||||
2340 | CppHashInfo.Filename = Filename; | ||||||
2341 | CppHashInfo.LineNumber = LineNumber; | ||||||
2342 | CppHashInfo.Buf = CurBuffer; | ||||||
2343 | if (FirstCppHashFilename.empty()) | ||||||
2344 | FirstCppHashFilename = Filename; | ||||||
2345 | return false; | ||||||
2346 | } | ||||||
2347 | |||||||
2348 | /// will use the last parsed cpp hash line filename comment | ||||||
2349 | /// for the Filename and LineNo if any in the diagnostic. | ||||||
2350 | void AsmParser::DiagHandler(const SMDiagnostic &Diag, void *Context) { | ||||||
2351 | auto *Parser = static_cast<AsmParser *>(Context); | ||||||
2352 | raw_ostream &OS = errs(); | ||||||
2353 | |||||||
2354 | const SourceMgr &DiagSrcMgr = *Diag.getSourceMgr(); | ||||||
2355 | SMLoc DiagLoc = Diag.getLoc(); | ||||||
2356 | unsigned DiagBuf = DiagSrcMgr.FindBufferContainingLoc(DiagLoc); | ||||||
2357 | unsigned CppHashBuf = | ||||||
2358 | Parser->SrcMgr.FindBufferContainingLoc(Parser->CppHashInfo.Loc); | ||||||
2359 | |||||||
2360 | // Like SourceMgr::printMessage() we need to print the include stack if any | ||||||
2361 | // before printing the message. | ||||||
2362 | unsigned DiagCurBuffer = DiagSrcMgr.FindBufferContainingLoc(DiagLoc); | ||||||
2363 | if (!Parser->SavedDiagHandler && DiagCurBuffer && | ||||||
2364 | DiagCurBuffer != DiagSrcMgr.getMainFileID()) { | ||||||
2365 | SMLoc ParentIncludeLoc = DiagSrcMgr.getParentIncludeLoc(DiagCurBuffer); | ||||||
2366 | DiagSrcMgr.PrintIncludeStack(ParentIncludeLoc, OS); | ||||||
2367 | } | ||||||
2368 | |||||||
2369 | // If we have not parsed a cpp hash line filename comment or the source | ||||||
2370 | // manager changed or buffer changed (like in a nested include) then just | ||||||
2371 | // print the normal diagnostic using its Filename and LineNo. | ||||||
2372 | if (!Parser->CppHashInfo.LineNumber || DiagBuf != CppHashBuf) { | ||||||
2373 | if (Parser->SavedDiagHandler) | ||||||
2374 | Parser->SavedDiagHandler(Diag, Parser->SavedDiagContext); | ||||||
2375 | else | ||||||
2376 | Parser->getContext().diagnose(Diag); | ||||||
2377 | return; | ||||||
2378 | } | ||||||
2379 | |||||||
2380 | // Use the CppHashFilename and calculate a line number based on the | ||||||
2381 | // CppHashInfo.Loc and CppHashInfo.LineNumber relative to this Diag's SMLoc | ||||||
2382 | // for the diagnostic. | ||||||
2383 | const std::string &Filename = std::string(Parser->CppHashInfo.Filename); | ||||||
2384 | |||||||
2385 | int DiagLocLineNo = DiagSrcMgr.FindLineNumber(DiagLoc, DiagBuf); | ||||||
2386 | int CppHashLocLineNo = | ||||||
2387 | Parser->SrcMgr.FindLineNumber(Parser->CppHashInfo.Loc, CppHashBuf); | ||||||
2388 | int LineNo = | ||||||
2389 | Parser->CppHashInfo.LineNumber - 1 + (DiagLocLineNo - CppHashLocLineNo); | ||||||
2390 | |||||||
2391 | SMDiagnostic NewDiag(*Diag.getSourceMgr(), Diag.getLoc(), Filename, LineNo, | ||||||
2392 | Diag.getColumnNo(), Diag.getKind(), Diag.getMessage(), | ||||||
2393 | Diag.getLineContents(), Diag.getRanges()); | ||||||
2394 | |||||||
2395 | if (Parser->SavedDiagHandler) | ||||||
2396 | Parser->SavedDiagHandler(Diag, Parser->SavedDiagContext); | ||||||
2397 | else | ||||||
2398 | Parser->getContext().diagnose(NewDiag); | ||||||
2399 | } | ||||||
2400 | |||||||
2401 | // FIXME: This is mostly duplicated from the function in AsmLexer.cpp. The | ||||||
2402 | // difference being that that function accepts '@' as part of identifiers and | ||||||
2403 | // we can't do that. AsmLexer.cpp should probably be changed to handle | ||||||
2404 | // '@' as a special case when needed. | ||||||
2405 | static bool isIdentifierChar(char c) { | ||||||
2406 | return isalnum(static_cast<unsigned char>(c)) || c == '_' || c == '$' || | ||||||
2407 | c == '.'; | ||||||
2408 | } | ||||||
2409 | |||||||
2410 | bool AsmParser::expandMacro(raw_svector_ostream &OS, StringRef Body, | ||||||
2411 | ArrayRef<MCAsmMacroParameter> Parameters, | ||||||
2412 | ArrayRef<MCAsmMacroArgument> A, | ||||||
2413 | bool EnableAtPseudoVariable, SMLoc L) { | ||||||
2414 | unsigned NParameters = Parameters.size(); | ||||||
2415 | bool HasVararg = NParameters ? Parameters.back().Vararg : false; | ||||||
2416 | if ((!IsDarwin || NParameters != 0) && NParameters != A.size()) | ||||||
2417 | return Error(L, "Wrong number of arguments"); | ||||||
2418 | |||||||
2419 | // A macro without parameters is handled differently on Darwin: | ||||||
2420 | // gas accepts no arguments and does no substitutions | ||||||
2421 | while (!Body.empty()) { | ||||||
2422 | // Scan for the next substitution. | ||||||
2423 | std::size_t End = Body.size(), Pos = 0; | ||||||
2424 | for (; Pos != End; ++Pos) { | ||||||
2425 | // Check for a substitution or escape. | ||||||
2426 | if (IsDarwin && !NParameters) { | ||||||
2427 | // This macro has no parameters, look for $0, $1, etc. | ||||||
2428 | if (Body[Pos] != '$' || Pos + 1 == End) | ||||||
2429 | continue; | ||||||
2430 | |||||||
2431 | char Next = Body[Pos + 1]; | ||||||
2432 | if (Next == '$' || Next == 'n' || | ||||||
2433 | isdigit(static_cast<unsigned char>(Next))) | ||||||
2434 | break; | ||||||
2435 | } else { | ||||||
2436 | // This macro has parameters, look for \foo, \bar, etc. | ||||||
2437 | if (Body[Pos] == '\\' && Pos + 1 != End) | ||||||
2438 | break; | ||||||
2439 | } | ||||||
2440 | } | ||||||
2441 | |||||||
2442 | // Add the prefix. | ||||||
2443 | OS << Body.slice(0, Pos); | ||||||
2444 | |||||||
2445 | // Check if we reached the end. | ||||||
2446 | if (Pos == End) | ||||||
2447 | break; | ||||||
2448 | |||||||
2449 | if (IsDarwin && !NParameters) { | ||||||
2450 | switch (Body[Pos + 1]) { | ||||||
2451 | // $$ => $ | ||||||
2452 | case '$': | ||||||
2453 | OS << '$'; | ||||||
2454 | break; | ||||||
2455 | |||||||
2456 | // $n => number of arguments | ||||||
2457 | case 'n': | ||||||
2458 | OS << A.size(); | ||||||
2459 | break; | ||||||
2460 | |||||||
2461 | // $[0-9] => argument | ||||||
2462 | default: { | ||||||
2463 | // Missing arguments are ignored. | ||||||
2464 | unsigned Index = Body[Pos + 1] - '0'; | ||||||
2465 | if (Index >= A.size()) | ||||||
2466 | break; | ||||||
2467 | |||||||
2468 | // Otherwise substitute with the token values, with spaces eliminated. | ||||||
2469 | for (const AsmToken &Token : A[Index]) | ||||||
2470 | OS << Token.getString(); | ||||||
2471 | break; | ||||||
2472 | } | ||||||
2473 | } | ||||||
2474 | Pos += 2; | ||||||
2475 | } else { | ||||||
2476 | unsigned I = Pos + 1; | ||||||
2477 | |||||||
2478 | // Check for the \@ pseudo-variable. | ||||||
2479 | if (EnableAtPseudoVariable && Body[I] == '@' && I + 1 != End) | ||||||
2480 | ++I; | ||||||
2481 | else | ||||||
2482 | while (isIdentifierChar(Body[I]) && I + 1 != End) | ||||||
2483 | ++I; | ||||||
2484 | |||||||
2485 | const char *Begin = Body.data() + Pos + 1; | ||||||
2486 | StringRef Argument(Begin, I - (Pos + 1)); | ||||||
2487 | unsigned Index = 0; | ||||||
2488 | |||||||
2489 | if (Argument == "@") { | ||||||
2490 | OS << NumOfMacroInstantiations; | ||||||
2491 | Pos += 2; | ||||||
2492 | } else { | ||||||
2493 | for (; Index < NParameters; ++Index) | ||||||
2494 | if (Parameters[Index].Name == Argument) | ||||||
2495 | break; | ||||||
2496 | |||||||
2497 | if (Index == NParameters) { | ||||||
2498 | if (Body[Pos + 1] == '(' && Body[Pos + 2] == ')') | ||||||
2499 | Pos += 3; | ||||||
2500 | else { | ||||||
2501 | OS << '\\' << Argument; | ||||||
2502 | Pos = I; | ||||||
2503 | } | ||||||
2504 | } else { | ||||||
2505 | bool VarargParameter = HasVararg && Index == (NParameters - 1); | ||||||
2506 | for (const AsmToken &Token : A[Index]) | ||||||
2507 | // For altmacro mode, you can write '%expr'. | ||||||
2508 | // The prefix '%' evaluates the expression 'expr' | ||||||
2509 | // and uses the result as a string (e.g. replace %(1+2) with the | ||||||
2510 | // string "3"). | ||||||
2511 | // Here, we identify the integer token which is the result of the | ||||||
2512 | // absolute expression evaluation and replace it with its string | ||||||
2513 | // representation. | ||||||
2514 | if (AltMacroMode && Token.getString().front() == '%' && | ||||||
2515 | Token.is(AsmToken::Integer)) | ||||||
2516 | // Emit an integer value to the buffer. | ||||||
2517 | OS << Token.getIntVal(); | ||||||
2518 | // Only Token that was validated as a string and begins with '<' | ||||||
2519 | // is considered altMacroString!!! | ||||||
2520 | else if (AltMacroMode && Token.getString().front() == '<' && | ||||||
2521 | Token.is(AsmToken::String)) { | ||||||
2522 | OS << angleBracketString(Token.getStringContents()); | ||||||
2523 | } | ||||||
2524 | // We expect no quotes around the string's contents when | ||||||
2525 | // parsing for varargs. | ||||||
2526 | else if (Token.isNot(AsmToken::String) || VarargParameter) | ||||||
2527 | OS << Token.getString(); | ||||||
2528 | else | ||||||
2529 | OS << Token.getStringContents(); | ||||||
2530 | |||||||
2531 | Pos += 1 + Argument.size(); | ||||||
2532 | } | ||||||
2533 | } | ||||||
2534 | } | ||||||
2535 | // Update the scan point. | ||||||
2536 | Body = Body.substr(Pos); | ||||||
2537 | } | ||||||
2538 | |||||||
2539 | return false; | ||||||
2540 | } | ||||||
2541 | |||||||
2542 | static bool isOperator(AsmToken::TokenKind kind) { | ||||||
2543 | switch (kind) { | ||||||
2544 | default: | ||||||
2545 | return false; | ||||||
2546 | case AsmToken::Plus: | ||||||
2547 | case AsmToken::Minus: | ||||||
2548 | case AsmToken::Tilde: | ||||||
2549 | case AsmToken::Slash: | ||||||
2550 | case AsmToken::Star: | ||||||
2551 | case AsmToken::Dot: | ||||||
2552 | case AsmToken::Equal: | ||||||
2553 | case AsmToken::EqualEqual: | ||||||
2554 | case AsmToken::Pipe: | ||||||
2555 | case AsmToken::PipePipe: | ||||||
2556 | case AsmToken::Caret: | ||||||
2557 | case AsmToken::Amp: | ||||||
2558 | case AsmToken::AmpAmp: | ||||||
2559 | case AsmToken::Exclaim: | ||||||
2560 | case AsmToken::ExclaimEqual: | ||||||
2561 | case AsmToken::Less: | ||||||
2562 | case AsmToken::LessEqual: | ||||||
2563 | case AsmToken::LessLess: | ||||||
2564 | case AsmToken::LessGreater: | ||||||
2565 | case AsmToken::Greater: | ||||||
2566 | case AsmToken::GreaterEqual: | ||||||
2567 | case AsmToken::GreaterGreater: | ||||||
2568 | return true; | ||||||
2569 | } | ||||||
2570 | } | ||||||
2571 | |||||||
2572 | namespace { | ||||||
2573 | |||||||
2574 | class AsmLexerSkipSpaceRAII { | ||||||
2575 | public: | ||||||
2576 | AsmLexerSkipSpaceRAII(AsmLexer &Lexer, bool SkipSpace) : Lexer(Lexer) { | ||||||
2577 | Lexer.setSkipSpace(SkipSpace); | ||||||
2578 | } | ||||||
2579 | |||||||
2580 | ~AsmLexerSkipSpaceRAII() { | ||||||
2581 | Lexer.setSkipSpace(true); | ||||||
2582 | } | ||||||
2583 | |||||||
2584 | private: | ||||||
2585 | AsmLexer &Lexer; | ||||||
2586 | }; | ||||||
2587 | |||||||
2588 | } // end anonymous namespace | ||||||
2589 | |||||||
2590 | bool AsmParser::parseMacroArgument(MCAsmMacroArgument &MA, bool Vararg) { | ||||||
2591 | |||||||
2592 | if (Vararg) { | ||||||
2593 | if (Lexer.isNot(AsmToken::EndOfStatement)) { | ||||||
2594 | StringRef Str = parseStringToEndOfStatement(); | ||||||
2595 | MA.emplace_back(AsmToken::String, Str); | ||||||
2596 | } | ||||||
2597 | return false; | ||||||
2598 | } | ||||||
2599 | |||||||
2600 | unsigned ParenLevel = 0; | ||||||
2601 | |||||||
2602 | // Darwin doesn't use spaces to delmit arguments. | ||||||
2603 | AsmLexerSkipSpaceRAII ScopedSkipSpace(Lexer, IsDarwin); | ||||||
2604 | |||||||
2605 | bool SpaceEaten; | ||||||
2606 | |||||||
2607 | while (true) { | ||||||
2608 | SpaceEaten = false; | ||||||
2609 | if (Lexer.is(AsmToken::Eof) || Lexer.is(AsmToken::Equal)) | ||||||
2610 | return TokError("unexpected token in macro instantiation"); | ||||||
2611 | |||||||
2612 | if (ParenLevel == 0) { | ||||||
2613 | |||||||
2614 | if (Lexer.is(AsmToken::Comma)) | ||||||
2615 | break; | ||||||
2616 | |||||||
2617 | if (Lexer.is(AsmToken::Space)) { | ||||||
2618 | SpaceEaten = true; | ||||||
2619 | Lexer.Lex(); // Eat spaces | ||||||
2620 | } | ||||||
2621 | |||||||
2622 | // Spaces can delimit parameters, but could also be part an expression. | ||||||
2623 | // If the token after a space is an operator, add the token and the next | ||||||
2624 | // one into this argument | ||||||
2625 | if (!IsDarwin) { | ||||||
2626 | if (isOperator(Lexer.getKind())) { | ||||||
2627 | MA.push_back(getTok()); | ||||||
2628 | Lexer.Lex(); | ||||||
2629 | |||||||
2630 | // Whitespace after an operator can be ignored. | ||||||
2631 | if (Lexer.is(AsmToken::Space)) | ||||||
2632 | Lexer.Lex(); | ||||||
2633 | |||||||
2634 | continue; | ||||||
2635 | } | ||||||
2636 | } | ||||||
2637 | if (SpaceEaten) | ||||||
2638 | break; | ||||||
2639 | } | ||||||
2640 | |||||||
2641 | // handleMacroEntry relies on not advancing the lexer here | ||||||
2642 | // to be able to fill in the remaining default parameter values | ||||||
2643 | if (Lexer.is(AsmToken::EndOfStatement)) | ||||||
2644 | break; | ||||||
2645 | |||||||
2646 | // Adjust the current parentheses level. | ||||||
2647 | if (Lexer.is(AsmToken::LParen)) | ||||||
2648 | ++ParenLevel; | ||||||
2649 | else if (Lexer.is(AsmToken::RParen) && ParenLevel) | ||||||
2650 | --ParenLevel; | ||||||
2651 | |||||||
2652 | // Append the token to the current argument list. | ||||||
2653 | MA.push_back(getTok()); | ||||||
2654 | Lexer.Lex(); | ||||||
2655 | } | ||||||
2656 | |||||||
2657 | if (ParenLevel != 0) | ||||||
2658 | return TokError("unbalanced parentheses in macro argument"); | ||||||
2659 | return false; | ||||||
2660 | } | ||||||
2661 | |||||||
2662 | // Parse the macro instantiation arguments. | ||||||
2663 | bool AsmParser::parseMacroArguments(const MCAsmMacro *M, | ||||||
2664 | MCAsmMacroArguments &A) { | ||||||
2665 | const unsigned NParameters = M ? M->Parameters.size() : 0; | ||||||
2666 | bool NamedParametersFound = false; | ||||||
2667 | SmallVector<SMLoc, 4> FALocs; | ||||||
2668 | |||||||
2669 | A.resize(NParameters); | ||||||
2670 | FALocs.resize(NParameters); | ||||||
2671 | |||||||
2672 | // Parse two kinds of macro invocations: | ||||||
2673 | // - macros defined without any parameters accept an arbitrary number of them | ||||||
2674 | // - macros defined with parameters accept at most that many of them | ||||||
2675 | bool HasVararg = NParameters ? M->Parameters.back().Vararg : false; | ||||||
2676 | for (unsigned Parameter = 0; !NParameters || Parameter < NParameters; | ||||||
2677 | ++Parameter) { | ||||||
2678 | SMLoc IDLoc = Lexer.getLoc(); | ||||||
2679 | MCAsmMacroParameter FA; | ||||||
2680 | |||||||
2681 | if (Lexer.is(AsmToken::Identifier) && Lexer.peekTok().is(AsmToken::Equal)) { | ||||||
2682 | if (parseIdentifier(FA.Name)) | ||||||
2683 | return Error(IDLoc, "invalid argument identifier for formal argument"); | ||||||
2684 | |||||||
2685 | if (Lexer.isNot(AsmToken::Equal)) | ||||||
2686 | return TokError("expected '=' after formal parameter identifier"); | ||||||
2687 | |||||||
2688 | Lex(); | ||||||
2689 | |||||||
2690 | NamedParametersFound = true; | ||||||
2691 | } | ||||||
2692 | bool Vararg = HasVararg && Parameter == (NParameters - 1); | ||||||
2693 | |||||||
2694 | if (NamedParametersFound && FA.Name.empty()) | ||||||
2695 | return Error(IDLoc, "cannot mix positional and keyword arguments"); | ||||||
2696 | |||||||
2697 | SMLoc StrLoc = Lexer.getLoc(); | ||||||
2698 | SMLoc EndLoc; | ||||||
2699 | if (AltMacroMode && Lexer.is(AsmToken::Percent)) { | ||||||
2700 | const MCExpr *AbsoluteExp; | ||||||
2701 | int64_t Value; | ||||||
2702 | /// Eat '%' | ||||||
2703 | Lex(); | ||||||
2704 | if (parseExpression(AbsoluteExp, EndLoc)) | ||||||
2705 | return false; | ||||||
2706 | if (!AbsoluteExp->evaluateAsAbsolute(Value, | ||||||
2707 | getStreamer().getAssemblerPtr())) | ||||||
2708 | return Error(StrLoc, "expected absolute expression"); | ||||||
2709 | const char *StrChar = StrLoc.getPointer(); | ||||||
2710 | const char *EndChar = EndLoc.getPointer(); | ||||||
2711 | AsmToken newToken(AsmToken::Integer, | ||||||
2712 | StringRef(StrChar, EndChar - StrChar), Value); | ||||||
2713 | FA.Value.push_back(newToken); | ||||||
2714 | } else if (AltMacroMode && Lexer.is(AsmToken::Less) && | ||||||
2715 | isAngleBracketString(StrLoc, EndLoc)) { | ||||||
2716 | const char *StrChar = StrLoc.getPointer(); | ||||||
2717 | const char *EndChar = EndLoc.getPointer(); | ||||||
2718 | jumpToLoc(EndLoc, CurBuffer); | ||||||
2719 | /// Eat from '<' to '>' | ||||||
2720 | Lex(); | ||||||
2721 | AsmToken newToken(AsmToken::String, | ||||||
2722 | StringRef(StrChar, EndChar - StrChar)); | ||||||
2723 | FA.Value.push_back(newToken); | ||||||
2724 | } else if(parseMacroArgument(FA.Value, Vararg)) | ||||||
2725 | return true; | ||||||
2726 | |||||||
2727 | unsigned PI = Parameter; | ||||||
2728 | if (!FA.Name.empty()) { | ||||||
2729 | unsigned FAI = 0; | ||||||
2730 | for (FAI = 0; FAI < NParameters; ++FAI) | ||||||
2731 | if (M->Parameters[FAI].Name == FA.Name) | ||||||
2732 | break; | ||||||
2733 | |||||||
2734 | if (FAI >= NParameters) { | ||||||
2735 | assert(M && "expected macro to be defined")((M && "expected macro to be defined") ? static_cast< void> (0) : __assert_fail ("M && \"expected macro to be defined\"" , "/build/llvm-toolchain-snapshot-13~++20210306111116+7ae191f59f0f/llvm/lib/MC/MCParser/AsmParser.cpp" , 2735, __PRETTY_FUNCTION__)); | ||||||
2736 | return Error(IDLoc, "parameter named '" + FA.Name + | ||||||
2737 | "' does not exist for macro '" + M->Name + "'"); | ||||||
2738 | } | ||||||
2739 | PI = FAI; | ||||||
2740 | } | ||||||
2741 | |||||||
2742 | if (!FA.Value.empty()) { | ||||||
2743 | if (A.size() <= PI) | ||||||
2744 | A.resize(PI + 1); | ||||||
2745 | A[PI] = FA.Value; | ||||||
2746 | |||||||
2747 | if (FALocs.size() <= PI) | ||||||
2748 | FALocs.resize(PI + 1); | ||||||
2749 | |||||||
2750 | FALocs[PI] = Lexer.getLoc(); | ||||||
2751 | } | ||||||
2752 | |||||||
2753 | // At the end of the statement, fill in remaining arguments that have | ||||||
2754 | // default values. If there aren't any, then the next argument is | ||||||
2755 | // required but missing | ||||||
2756 | if (Lexer.is(AsmToken::EndOfStatement)) { | ||||||
2757 | bool Failure = false; | ||||||
2758 | for (unsigned FAI = 0; FAI < NParameters; ++FAI) { | ||||||
2759 | if (A[FAI].empty()) { | ||||||
2760 | if (M->Parameters[FAI].Required) { | ||||||
2761 | Error(FALocs[FAI].isValid() ? FALocs[FAI] : Lexer.getLoc(), | ||||||
2762 | "missing value for required parameter " | ||||||
2763 | "'" + M->Parameters[FAI].Name + "' in macro '" + M->Name + "'"); | ||||||
2764 | Failure = true; | ||||||
2765 | } | ||||||
2766 | |||||||
2767 | if (!M->Parameters[FAI].Value.empty()) | ||||||
2768 | A[FAI] = M->Parameters[FAI].Value; | ||||||
2769 | } | ||||||
2770 | } | ||||||
2771 | return Failure; | ||||||
2772 | } | ||||||
2773 | |||||||
2774 | if (Lexer.is(AsmToken::Comma)) | ||||||
2775 | Lex(); | ||||||
2776 | } | ||||||
2777 | |||||||
2778 | return TokError("too many positional arguments"); | ||||||
2779 | } | ||||||
2780 | |||||||
2781 | bool AsmParser::handleMacroEntry(const MCAsmMacro *M, SMLoc NameLoc) { | ||||||
2782 | // Arbitrarily limit macro nesting depth (default matches 'as'). We can | ||||||
2783 | // eliminate this, although we should protect against infinite loops. | ||||||
2784 | unsigned MaxNestingDepth = AsmMacroMaxNestingDepth; | ||||||
2785 | if (ActiveMacros.size() == MaxNestingDepth) { | ||||||
2786 | std::ostringstream MaxNestingDepthError; | ||||||
2787 | MaxNestingDepthError << "macros cannot be nested more than " | ||||||
2788 | << MaxNestingDepth << " levels deep." | ||||||
2789 | << " Use -asm-macro-max-nesting-depth to increase " | ||||||
2790 | "this limit."; | ||||||
2791 | return TokError(MaxNestingDepthError.str()); | ||||||
2792 | } | ||||||
2793 | |||||||
2794 | MCAsmMacroArguments A; | ||||||
2795 | if (parseMacroArguments(M, A)) | ||||||
2796 | return true; | ||||||
2797 | |||||||
2798 | // Macro instantiation is lexical, unfortunately. We construct a new buffer | ||||||
2799 | // to hold the macro body with substitutions. | ||||||
2800 | SmallString<256> Buf; | ||||||
2801 | StringRef Body = M->Body; | ||||||
2802 | raw_svector_ostream OS(Buf); | ||||||
2803 | |||||||
2804 | if (expandMacro(OS, Body, M->Parameters, A, true, getTok().getLoc())) | ||||||
2805 | return true; | ||||||
2806 | |||||||
2807 | // We include the .endmacro in the buffer as our cue to exit the macro | ||||||
2808 | // instantiation. | ||||||
2809 | OS << ".endmacro\n"; | ||||||
2810 | |||||||
2811 | std::unique_ptr<MemoryBuffer> Instantiation = | ||||||
2812 | MemoryBuffer::getMemBufferCopy(OS.str(), "<instantiation>"); | ||||||
2813 | |||||||
2814 | // Create the macro instantiation object and add to the current macro | ||||||
2815 | // instantiation stack. | ||||||
2816 | MacroInstantiation *MI = new MacroInstantiation{ | ||||||
2817 | NameLoc, CurBuffer, getTok().getLoc(), TheCondStack.size()}; | ||||||
2818 | ActiveMacros.push_back(MI); | ||||||
2819 | |||||||
2820 | ++NumOfMacroInstantiations; | ||||||
2821 | |||||||
2822 | // Jump to the macro instantiation and prime the lexer. | ||||||
2823 | CurBuffer = SrcMgr.AddNewSourceBuffer(std::move(Instantiation), SMLoc()); | ||||||
2824 | Lexer.setBuffer(SrcMgr.getMemoryBuffer(CurBuffer)->getBuffer()); | ||||||
2825 | Lex(); | ||||||
2826 | |||||||
2827 | return false; | ||||||
2828 | } | ||||||
2829 | |||||||
2830 | void AsmParser::handleMacroExit() { | ||||||
2831 | // Jump to the EndOfStatement we should return to, and consume it. | ||||||
2832 | jumpToLoc(ActiveMacros.back()->ExitLoc, ActiveMacros.back()->ExitBuffer); | ||||||
2833 | Lex(); | ||||||
2834 | |||||||
2835 | // Pop the instantiation entry. | ||||||
2836 | delete ActiveMacros.back(); | ||||||
2837 | ActiveMacros.pop_back(); | ||||||
2838 | } | ||||||
2839 | |||||||
2840 | bool AsmParser::parseAssignment(StringRef Name, bool allow_redef, | ||||||
2841 | bool NoDeadStrip) { | ||||||
2842 | MCSymbol *Sym; | ||||||
2843 | const MCExpr *Value; | ||||||
2844 | if (MCParserUtils::parseAssignmentExpression(Name, allow_redef, *this, Sym, | ||||||
2845 | Value)) | ||||||
2846 | return true; | ||||||
2847 | |||||||
2848 | if (!Sym) { | ||||||
2849 | // In the case where we parse an expression starting with a '.', we will | ||||||
2850 | // not generate an error, nor will we create a symbol. In this case we | ||||||
2851 | // should just return out. | ||||||
2852 | return false; | ||||||
2853 | } | ||||||
2854 | |||||||
2855 | // Do the assignment. | ||||||
2856 | Out.emitAssignment(Sym, Value); | ||||||
2857 | if (NoDeadStrip) | ||||||
2858 | Out.emitSymbolAttribute(Sym, MCSA_NoDeadStrip); | ||||||
2859 | |||||||
2860 | return false; | ||||||
2861 | } | ||||||
2862 | |||||||
2863 | /// parseIdentifier: | ||||||
2864 | /// ::= identifier | ||||||
2865 | /// ::= string | ||||||
2866 | bool AsmParser::parseIdentifier(StringRef &Res) { | ||||||
2867 | // The assembler has relaxed rules for accepting identifiers, in particular we | ||||||
2868 | // allow things like '.globl $foo' and '.def @feat.00', which would normally be | ||||||
2869 | // separate tokens. At this level, we have already lexed so we cannot (currently) | ||||||
2870 | // handle this as a context dependent token, instead we detect adjacent tokens | ||||||
2871 | // and return the combined identifier. | ||||||
2872 | if (Lexer.is(AsmToken::Dollar) || Lexer.is(AsmToken::At)) { | ||||||
2873 | SMLoc PrefixLoc = getLexer().getLoc(); | ||||||
2874 | |||||||
2875 | // Consume the prefix character, and check for a following identifier. | ||||||
2876 | |||||||
2877 | AsmToken Buf[1]; | ||||||
2878 | Lexer.peekTokens(Buf, false); | ||||||
2879 | |||||||
2880 | if (Buf[0].isNot(AsmToken::Identifier) && Buf[0].isNot(AsmToken::Integer)) | ||||||
2881 | return true; | ||||||
2882 | |||||||
2883 | // We have a '$' or '@' followed by an identifier or integer token, make | ||||||
2884 | // sure they are adjacent. | ||||||
2885 | if (PrefixLoc.getPointer() + 1 != Buf[0].getLoc().getPointer()) | ||||||
2886 | return true; | ||||||
2887 | |||||||
2888 | // eat $ or @ | ||||||
2889 | Lexer.Lex(); // Lexer's Lex guarantees consecutive token. | ||||||
2890 | // Construct the joined identifier and consume the token. | ||||||
2891 | Res = StringRef(PrefixLoc.getPointer(), getTok().getString().size() + 1); | ||||||
2892 | Lex(); // Parser Lex to maintain invariants. | ||||||
2893 | return false; | ||||||
2894 | } | ||||||
2895 | |||||||
2896 | if (Lexer.isNot(AsmToken::Identifier) && Lexer.isNot(AsmToken::String)) | ||||||
2897 | return true; | ||||||
2898 | |||||||
2899 | Res = getTok().getIdentifier(); | ||||||
2900 | |||||||
2901 | Lex(); // Consume the identifier token. | ||||||
2902 | |||||||
2903 | return false; | ||||||
2904 | } | ||||||
2905 | |||||||
2906 | /// parseDirectiveSet: | ||||||
2907 | /// ::= .equ identifier ',' expression | ||||||
2908 | /// ::= .equiv identifier ',' expression | ||||||
2909 | /// ::= .set identifier ',' expression | ||||||
2910 | bool AsmParser::parseDirectiveSet(StringRef IDVal, bool allow_redef) { | ||||||
2911 | StringRef Name; | ||||||
2912 | if (check(parseIdentifier(Name), "expected identifier") || | ||||||
2913 | parseToken(AsmToken::Comma) || parseAssignment(Name, allow_redef, true)) | ||||||
2914 | return addErrorSuffix(" in '" + Twine(IDVal) + "' directive"); | ||||||
2915 | return false; | ||||||
2916 | } | ||||||
2917 | |||||||
2918 | bool AsmParser::parseEscapedString(std::string &Data) { | ||||||
2919 | if (check(getTok().isNot(AsmToken::String), "expected string")) | ||||||
2920 | return true; | ||||||
2921 | |||||||
2922 | Data = ""; | ||||||
2923 | StringRef Str = getTok().getStringContents(); | ||||||
2924 | for (unsigned i = 0, e = Str.size(); i != e; ++i) { | ||||||
2925 | if (Str[i] != '\\') { | ||||||
2926 | Data += Str[i]; | ||||||
2927 | continue; | ||||||
2928 | } | ||||||
2929 | |||||||
2930 | // Recognize escaped characters. Note that this escape semantics currently | ||||||
2931 | // loosely follows Darwin 'as'. | ||||||
2932 | ++i; | ||||||
2933 | if (i == e) | ||||||
2934 | return TokError("unexpected backslash at end of string"); | ||||||
2935 | |||||||
2936 | // Recognize hex sequences similarly to GNU 'as'. | ||||||
2937 | if (Str[i] == 'x' || Str[i] == 'X') { | ||||||
2938 | size_t length = Str.size(); | ||||||
2939 | if (i + 1 >= length || !isHexDigit(Str[i + 1])) | ||||||
2940 | return TokError("invalid hexadecimal escape sequence"); | ||||||
2941 | |||||||
2942 | // Consume hex characters. GNU 'as' reads all hexadecimal characters and | ||||||
2943 | // then truncates to the lower 16 bits. Seems reasonable. | ||||||
2944 | unsigned Value = 0; | ||||||
2945 | while (i + 1 < length && isHexDigit(Str[i + 1])) | ||||||
2946 | Value = Value * 16 + hexDigitValue(Str[++i]); | ||||||
2947 | |||||||
2948 | Data += (unsigned char)(Value & 0xFF); | ||||||
2949 | continue; | ||||||
2950 | } | ||||||
2951 | |||||||
2952 | // Recognize octal sequences. | ||||||
2953 | if ((unsigned)(Str[i] - '0') <= 7) { | ||||||
2954 | // Consume up to three octal characters. | ||||||
2955 | unsigned Value = Str[i] - '0'; | ||||||
2956 | |||||||
2957 | if (i + 1 != e && ((unsigned)(Str[i + 1] - '0')) <= 7) { | ||||||
2958 | ++i; | ||||||
2959 | Value = Value * 8 + (Str[i] - '0'); | ||||||
2960 | |||||||
2961 | if (i + 1 != e && ((unsigned)(Str[i + 1] - '0')) <= 7) { | ||||||
2962 | ++i; | ||||||
2963 | Value = Value * 8 + (Str[i] - '0'); | ||||||
2964 | } | ||||||
2965 | } | ||||||
2966 | |||||||
2967 | if (Value > 255) | ||||||
2968 | return TokError("invalid octal escape sequence (out of range)"); | ||||||
2969 | |||||||
2970 | Data += (unsigned char)Value; | ||||||
2971 | continue; | ||||||
2972 | } | ||||||
2973 | |||||||
2974 | // Otherwise recognize individual escapes. | ||||||
2975 | switch (Str[i]) { | ||||||
2976 | default: | ||||||
2977 | // Just reject invalid escape sequences for now. | ||||||
2978 | return TokError("invalid escape sequence (unrecognized character)"); | ||||||
2979 | |||||||
2980 | case 'b': Data += '\b'; break; | ||||||
2981 | case 'f': Data += '\f'; break; | ||||||
2982 | case 'n': Data += '\n'; break; | ||||||
2983 | case 'r': Data += '\r'; break; | ||||||
2984 | case 't': Data += '\t'; break; | ||||||
2985 | case '"': Data += '"'; break; | ||||||
2986 | case '\\': Data += '\\'; break; | ||||||
2987 | } | ||||||
2988 | } | ||||||
2989 | |||||||
2990 | Lex(); | ||||||
2991 | return false; | ||||||
2992 | } | ||||||
2993 | |||||||
2994 | bool AsmParser::parseAngleBracketString(std::string &Data) { | ||||||
2995 | SMLoc EndLoc, StartLoc = getTok().getLoc(); | ||||||
2996 | if (isAngleBracketString(StartLoc, EndLoc)) { | ||||||
2997 | const char *StartChar = StartLoc.getPointer() + 1; | ||||||
2998 | const char *EndChar = EndLoc.getPointer() - 1; | ||||||
2999 | jumpToLoc(EndLoc, CurBuffer); | ||||||
3000 | /// Eat from '<' to '>' | ||||||
3001 | Lex(); | ||||||
3002 | |||||||
3003 | Data = angleBracketString(StringRef(StartChar, EndChar - StartChar)); | ||||||
3004 | return false; | ||||||
3005 | } | ||||||
3006 | return true; | ||||||
3007 | } | ||||||
3008 | |||||||
3009 | /// parseDirectiveAscii: | ||||||
3010 | // ::= .ascii [ "string"+ ( , "string"+ )* ] | ||||||
3011 | /// ::= ( .asciz | .string ) [ "string" ( , "string" )* ] | ||||||
3012 | bool AsmParser::parseDirectiveAscii(StringRef IDVal, bool ZeroTerminated) { | ||||||
3013 | auto parseOp = [&]() -> bool { | ||||||
3014 | std::string Data; | ||||||
3015 | if (checkForValidSection()) | ||||||
3016 | return true; | ||||||
3017 | // Only support spaces as separators for .ascii directive for now. See the | ||||||
3018 | // discusssion at https://reviews.llvm.org/D91460 for more details. | ||||||
3019 | do { | ||||||
3020 | if (parseEscapedString(Data)) | ||||||
3021 | return true; | ||||||
3022 | getStreamer().emitBytes(Data); | ||||||
3023 | } while (!ZeroTerminated && getTok().is(AsmToken::String)); | ||||||
3024 | if (ZeroTerminated) | ||||||
3025 | getStreamer().emitBytes(StringRef("\0", 1)); | ||||||
3026 | return false; | ||||||
3027 | }; | ||||||
3028 | |||||||
3029 | if (parseMany(parseOp)) | ||||||
3030 | return addErrorSuffix(" in '" + Twine(IDVal) + "' directive"); | ||||||
3031 | return false; | ||||||
3032 | } | ||||||
3033 | |||||||
3034 | /// parseDirectiveReloc | ||||||
3035 | /// ::= .reloc expression , identifier [ , expression ] | ||||||
3036 | bool AsmParser::parseDirectiveReloc(SMLoc DirectiveLoc) { | ||||||
3037 | const MCExpr *Offset; | ||||||
3038 | const MCExpr *Expr = nullptr; | ||||||
3039 | SMLoc OffsetLoc = Lexer.getTok().getLoc(); | ||||||
3040 | |||||||
3041 | if (parseExpression(Offset)) | ||||||
3042 | return true; | ||||||
3043 | if (parseToken(AsmToken::Comma, "expected comma") || | ||||||
3044 | check(getTok().isNot(AsmToken::Identifier), "expected relocation name")) | ||||||
3045 | return true; | ||||||
3046 | |||||||
3047 | SMLoc NameLoc = Lexer.getTok().getLoc(); | ||||||
3048 | StringRef Name = Lexer.getTok().getIdentifier(); | ||||||
3049 | Lex(); | ||||||
3050 | |||||||
3051 | if (Lexer.is(AsmToken::Comma)) { | ||||||
3052 | Lex(); | ||||||
3053 | SMLoc ExprLoc = Lexer.getLoc(); | ||||||
3054 | if (parseExpression(Expr)) | ||||||
3055 | return true; | ||||||
3056 | |||||||
3057 | MCValue Value; | ||||||
3058 | if (!Expr->evaluateAsRelocatable(Value, nullptr, nullptr)) | ||||||
3059 | return Error(ExprLoc, "expression must be relocatable"); | ||||||
3060 | } | ||||||
3061 | |||||||
3062 | if (parseToken(AsmToken::EndOfStatement, | ||||||
3063 | "unexpected token in .reloc directive")) | ||||||
3064 | return true; | ||||||
3065 | |||||||
3066 | const MCTargetAsmParser &MCT = getTargetParser(); | ||||||
3067 | const MCSubtargetInfo &STI = MCT.getSTI(); | ||||||
3068 | if (Optional<std::pair<bool, std::string>> Err = | ||||||
3069 | getStreamer().emitRelocDirective(*Offset, Name, Expr, DirectiveLoc, | ||||||
3070 | STI)) | ||||||
3071 | return Error(Err->first ? NameLoc : OffsetLoc, Err->second); | ||||||
3072 | |||||||
3073 | return false; | ||||||
3074 | } | ||||||
3075 | |||||||
3076 | /// parseDirectiveValue | ||||||
3077 | /// ::= (.byte | .short | ... ) [ expression (, expression)* ] | ||||||
3078 | bool AsmParser::parseDirectiveValue(StringRef IDVal, unsigned Size) { | ||||||
3079 | auto parseOp = [&]() -> bool { | ||||||
3080 | const MCExpr *Value; | ||||||
3081 | SMLoc ExprLoc = getLexer().getLoc(); | ||||||
3082 | if (checkForValidSection() || parseExpression(Value)) | ||||||
3083 | return true; | ||||||
3084 | // Special case constant expressions to match code generator. | ||||||
3085 | if (const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Value)) { | ||||||
3086 | assert(Size <= 8 && "Invalid size")((Size <= 8 && "Invalid size") ? static_cast<void > (0) : __assert_fail ("Size <= 8 && \"Invalid size\"" , "/build/llvm-toolchain-snapshot-13~++20210306111116+7ae191f59f0f/llvm/lib/MC/MCParser/AsmParser.cpp" , 3086, __PRETTY_FUNCTION__)); | ||||||
3087 | uint64_t IntValue = MCE->getValue(); | ||||||
3088 | if (!isUIntN(8 * Size, IntValue) && !isIntN(8 * Size, IntValue)) | ||||||
3089 | return Error(ExprLoc, "out of range literal value"); | ||||||
3090 | getStreamer().emitIntValue(IntValue, Size); | ||||||
3091 | } else | ||||||
3092 | getStreamer().emitValue(Value, Size, ExprLoc); | ||||||
3093 | return false; | ||||||
3094 | }; | ||||||
3095 | |||||||
3096 | if (parseMany(parseOp)) | ||||||
3097 | return addErrorSuffix(" in '" + Twine(IDVal) + "' directive"); | ||||||
3098 | return false; | ||||||
3099 | } | ||||||
3100 | |||||||
3101 | static bool parseHexOcta(AsmParser &Asm, uint64_t &hi, uint64_t &lo) { | ||||||
3102 | if (Asm.getTok().isNot(AsmToken::Integer) && | ||||||
3103 | Asm.getTok().isNot(AsmToken::BigNum)) | ||||||
3104 | return Asm.TokError("unknown token in expression"); | ||||||
3105 | SMLoc ExprLoc = Asm.getTok().getLoc(); | ||||||
3106 | APInt IntValue = Asm.getTok().getAPIntVal(); | ||||||
3107 | Asm.Lex(); | ||||||
3108 | if (!IntValue.isIntN(128)) | ||||||
3109 | return Asm.Error(ExprLoc, "out of range literal value"); | ||||||
3110 | if (!IntValue.isIntN(64)) { | ||||||
3111 | hi = IntValue.getHiBits(IntValue.getBitWidth() - 64).getZExtValue(); | ||||||
3112 | lo = IntValue.getLoBits(64).getZExtValue(); | ||||||
3113 | } else { | ||||||
3114 | hi = 0; | ||||||
3115 | lo = IntValue.getZExtValue(); | ||||||
3116 | } | ||||||
3117 | return false; | ||||||
3118 | } | ||||||
3119 | |||||||
3120 | /// ParseDirectiveOctaValue | ||||||
3121 | /// ::= .octa [ hexconstant (, hexconstant)* ] | ||||||
3122 | |||||||
3123 | bool AsmParser::parseDirectiveOctaValue(StringRef IDVal) { | ||||||
3124 | auto parseOp = [&]() -> bool { | ||||||
3125 | if (checkForValidSection()) | ||||||
3126 | return true; | ||||||
3127 | uint64_t hi, lo; | ||||||
3128 | if (parseHexOcta(*this, hi, lo)) | ||||||
3129 | return true; | ||||||
3130 | if (MAI.isLittleEndian()) { | ||||||
3131 | getStreamer().emitInt64(lo); | ||||||
3132 | getStreamer().emitInt64(hi); | ||||||
3133 | } else { | ||||||
3134 | getStreamer().emitInt64(hi); | ||||||
3135 | getStreamer().emitInt64(lo); | ||||||
3136 | } | ||||||
3137 | return false; | ||||||
3138 | }; | ||||||
3139 | |||||||
3140 | if (parseMany(parseOp)) | ||||||
3141 | return addErrorSuffix(" in '" + Twine(IDVal) + "' directive"); | ||||||
3142 | return false; | ||||||
3143 | } | ||||||
3144 | |||||||
3145 | bool AsmParser::parseRealValue(const fltSemantics &Semantics, APInt &Res) { | ||||||
3146 | // We don't truly support arithmetic on floating point expressions, so we | ||||||
3147 | // have to manually parse unary prefixes. | ||||||
3148 | bool IsNeg = false; | ||||||
3149 | if (getLexer().is(AsmToken::Minus)) { | ||||||
3150 | Lexer.Lex(); | ||||||
3151 | IsNeg = true; | ||||||
3152 | } else if (getLexer().is(AsmToken::Plus)) | ||||||
3153 | Lexer.Lex(); | ||||||
3154 | |||||||
3155 | if (Lexer.is(AsmToken::Error)) | ||||||
3156 | return TokError(Lexer.getErr()); | ||||||
3157 | if (Lexer.isNot(AsmToken::Integer) && Lexer.isNot(AsmToken::Real) && | ||||||
3158 | Lexer.isNot(AsmToken::Identifier)) | ||||||
3159 | return TokError("unexpected token in directive"); | ||||||
3160 | |||||||
3161 | // Convert to an APFloat. | ||||||
3162 | APFloat Value(Semantics); | ||||||
3163 | StringRef IDVal = getTok().getString(); | ||||||
3164 | if (getLexer().is(AsmToken::Identifier)) { | ||||||
3165 | if (!IDVal.compare_lower("infinity") || !IDVal.compare_lower("inf")) | ||||||
3166 | Value = APFloat::getInf(Semantics); | ||||||
3167 | else if (!IDVal.compare_lower("nan")) | ||||||
3168 | Value = APFloat::getNaN(Semantics, false, ~0); | ||||||
3169 | else | ||||||
3170 | return TokError("invalid floating point literal"); | ||||||
3171 | } else if (errorToBool( | ||||||
3172 | Value.convertFromString(IDVal, APFloat::rmNearestTiesToEven) | ||||||
3173 | .takeError())) | ||||||
3174 | return TokError("invalid floating point literal"); | ||||||
3175 | if (IsNeg) | ||||||
3176 | Value.changeSign(); | ||||||
3177 | |||||||
3178 | // Consume the numeric token. | ||||||
3179 | Lex(); | ||||||
3180 | |||||||
3181 | Res = Value.bitcastToAPInt(); | ||||||
3182 | |||||||
3183 | return false; | ||||||
3184 | } | ||||||
3185 | |||||||
3186 | /// parseDirectiveRealValue | ||||||
3187 | /// ::= (.single | .double) [ expression (, expression)* ] | ||||||
3188 | bool AsmParser::parseDirectiveRealValue(StringRef IDVal, | ||||||
3189 | const fltSemantics &Semantics) { | ||||||
3190 | auto parseOp = [&]() -> bool { | ||||||
3191 | APInt AsInt; | ||||||
3192 | if (checkForValidSection() || parseRealValue(Semantics, AsInt)) | ||||||
3193 | return true; | ||||||
3194 | getStreamer().emitIntValue(AsInt.getLimitedValue(), | ||||||
3195 | AsInt.getBitWidth() / 8); | ||||||
3196 | return false; | ||||||
3197 | }; | ||||||
3198 | |||||||
3199 | if (parseMany(parseOp)) | ||||||
3200 | return addErrorSuffix(" in '" + Twine(IDVal) + "' directive"); | ||||||
3201 | return false; | ||||||
3202 | } | ||||||
3203 | |||||||
3204 | /// parseDirectiveZero | ||||||
3205 | /// ::= .zero expression | ||||||
3206 | bool AsmParser::parseDirectiveZero() { | ||||||
3207 | SMLoc NumBytesLoc = Lexer.getLoc(); | ||||||
3208 | const MCExpr *NumBytes; | ||||||
3209 | if (checkForValidSection() || parseExpression(NumBytes)) | ||||||
3210 | return true; | ||||||
3211 | |||||||
3212 | int64_t Val = 0; | ||||||
3213 | if (getLexer().is(AsmToken::Comma)) { | ||||||
3214 | Lex(); | ||||||
3215 | if (parseAbsoluteExpression(Val)) | ||||||
3216 | return true; | ||||||
3217 | } | ||||||
3218 | |||||||
3219 | if (parseToken(AsmToken::EndOfStatement, | ||||||
3220 | "unexpected token in '.zero' directive")) | ||||||
3221 | return true; | ||||||
3222 | getStreamer().emitFill(*NumBytes, Val, NumBytesLoc); | ||||||
3223 | |||||||
3224 | return false; | ||||||
3225 | } | ||||||
3226 | |||||||
3227 | /// parseDirectiveFill | ||||||
3228 | /// ::= .fill expression [ , expression [ , expression ] ] | ||||||
3229 | bool AsmParser::parseDirectiveFill() { | ||||||
3230 | SMLoc NumValuesLoc = Lexer.getLoc(); | ||||||
3231 | const MCExpr *NumValues; | ||||||
3232 | if (checkForValidSection() || parseExpression(NumValues)) | ||||||
3233 | return true; | ||||||
3234 | |||||||
3235 | int64_t FillSize = 1; | ||||||
3236 | int64_t FillExpr = 0; | ||||||
3237 | |||||||
3238 | SMLoc SizeLoc, ExprLoc; | ||||||
3239 | |||||||
3240 | if (parseOptionalToken(AsmToken::Comma)) { | ||||||
3241 | SizeLoc = getTok().getLoc(); | ||||||
3242 | if (parseAbsoluteExpression(FillSize)) | ||||||
3243 | return true; | ||||||
3244 | if (parseOptionalToken(AsmToken::Comma)) { | ||||||
3245 | ExprLoc = getTok().getLoc(); | ||||||
3246 | if (parseAbsoluteExpression(FillExpr)) | ||||||
3247 | return true; | ||||||
3248 | } | ||||||
3249 | } | ||||||
3250 | if (parseToken(AsmToken::EndOfStatement, | ||||||
3251 | "unexpected token in '.fill' directive")) | ||||||
3252 | return true; | ||||||
3253 | |||||||
3254 | if (FillSize < 0) { | ||||||
3255 | Warning(SizeLoc, "'.fill' directive with negative size has no effect"); | ||||||
3256 | return false; | ||||||
3257 | } | ||||||
3258 | if (FillSize > 8) { | ||||||
3259 | Warning(SizeLoc, "'.fill' directive with size greater than 8 has been truncated to 8"); | ||||||
3260 | FillSize = 8; | ||||||
3261 | } | ||||||
3262 | |||||||
3263 | if (!isUInt<32>(FillExpr) && FillSize > 4) | ||||||
3264 | Warning(ExprLoc, "'.fill' directive pattern has been truncated to 32-bits"); | ||||||
3265 | |||||||
3266 | getStreamer().emitFill(*NumValues, FillSize, FillExpr, NumValuesLoc); | ||||||
3267 | |||||||
3268 | return false; | ||||||
3269 | } | ||||||
3270 | |||||||
3271 | /// parseDirectiveOrg | ||||||
3272 | /// ::= .org expression [ , expression ] | ||||||
3273 | bool AsmParser::parseDirectiveOrg() { | ||||||
3274 | const MCExpr *Offset; | ||||||
3275 | SMLoc OffsetLoc = Lexer.getLoc(); | ||||||
3276 | if (checkForValidSection() || parseExpression(Offset)) | ||||||
3277 | return true; | ||||||
3278 | |||||||
3279 | // Parse optional fill expression. | ||||||
3280 | int64_t FillExpr = 0; | ||||||
3281 | if (parseOptionalToken(AsmToken::Comma)) | ||||||
3282 | if (parseAbsoluteExpression(FillExpr)) | ||||||
3283 | return addErrorSuffix(" in '.org' directive"); | ||||||
3284 | if (parseToken(AsmToken::EndOfStatement)) | ||||||
3285 | return addErrorSuffix(" in '.org' directive"); | ||||||
3286 | |||||||
3287 | getStreamer().emitValueToOffset(Offset, FillExpr, OffsetLoc); | ||||||
3288 | return false; | ||||||
3289 | } | ||||||
3290 | |||||||
3291 | /// parseDirectiveAlign | ||||||
3292 | /// ::= {.align, ...} expression [ , expression [ , expression ]] | ||||||
3293 | bool AsmParser::parseDirectiveAlign(bool IsPow2, unsigned ValueSize) { | ||||||
3294 | SMLoc AlignmentLoc = getLexer().getLoc(); | ||||||
3295 | int64_t Alignment; | ||||||
3296 | SMLoc MaxBytesLoc; | ||||||
3297 | bool HasFillExpr = false; | ||||||
3298 | int64_t FillExpr = 0; | ||||||
3299 | int64_t MaxBytesToFill = 0; | ||||||
3300 | |||||||
3301 | auto parseAlign = [&]() -> bool { | ||||||
3302 | if (parseAbsoluteExpression(Alignment)) | ||||||
3303 | return true; | ||||||
3304 | if (parseOptionalToken(AsmToken::Comma)) { | ||||||
3305 | // The fill expression can be omitted while specifying a maximum number of | ||||||
3306 | // alignment bytes, e.g: | ||||||
3307 | // .align 3,,4 | ||||||
3308 | if (getTok().isNot(AsmToken::Comma)) { | ||||||
3309 | HasFillExpr = true; | ||||||
3310 | if (parseAbsoluteExpression(FillExpr)) | ||||||
3311 | return true; | ||||||
3312 | } | ||||||
3313 | if (parseOptionalToken(AsmToken::Comma)) | ||||||
3314 | if (parseTokenLoc(MaxBytesLoc) || | ||||||
3315 | parseAbsoluteExpression(MaxBytesToFill)) | ||||||
3316 | return true; | ||||||
3317 | } | ||||||
3318 | return parseToken(AsmToken::EndOfStatement); | ||||||
3319 | }; | ||||||
3320 | |||||||
3321 | if (checkForValidSection()) | ||||||
3322 | return addErrorSuffix(" in directive"); | ||||||
3323 | // Ignore empty '.p2align' directives for GNU-as compatibility | ||||||
3324 | if (IsPow2 && (ValueSize == 1) && getTok().is(AsmToken::EndOfStatement)) { | ||||||
3325 | Warning(AlignmentLoc, "p2align directive with no operand(s) is ignored"); | ||||||
3326 | return parseToken(AsmToken::EndOfStatement); | ||||||
3327 | } | ||||||
3328 | if (parseAlign()) | ||||||
3329 | return addErrorSuffix(" in directive"); | ||||||
3330 | |||||||
3331 | // Always emit an alignment here even if we thrown an error. | ||||||
3332 | bool ReturnVal = false; | ||||||
3333 | |||||||
3334 | // Compute alignment in bytes. | ||||||
3335 | if (IsPow2) { | ||||||
3336 | // FIXME: Diagnose overflow. | ||||||
3337 | if (Alignment >= 32) { | ||||||
3338 | ReturnVal |= Error(AlignmentLoc, "invalid alignment value"); | ||||||
3339 | Alignment = 31; | ||||||
3340 | } | ||||||
3341 | |||||||
3342 | Alignment = 1ULL << Alignment; | ||||||
3343 | } else { | ||||||
3344 | // Reject alignments that aren't either a power of two or zero, | ||||||
3345 | // for gas compatibility. Alignment of zero is silently rounded | ||||||
3346 | // up to one. | ||||||
3347 | if (Alignment == 0) | ||||||
3348 | Alignment = 1; | ||||||
3349 | if (!isPowerOf2_64(Alignment)) | ||||||
3350 | ReturnVal |= Error(AlignmentLoc, "alignment must be a power of 2"); | ||||||
3351 | if (!isUInt<32>(Alignment)) | ||||||
3352 | ReturnVal |= Error(AlignmentLoc, "alignment must be smaller than 2**32"); | ||||||
3353 | } | ||||||
3354 | |||||||
3355 | // Diagnose non-sensical max bytes to align. | ||||||
3356 | if (MaxBytesLoc.isValid()) { | ||||||
3357 | if (MaxBytesToFill < 1) { | ||||||
3358 | ReturnVal |= Error(MaxBytesLoc, | ||||||
3359 | "alignment directive can never be satisfied in this " | ||||||
3360 | "many bytes, ignoring maximum bytes expression"); | ||||||
3361 | MaxBytesToFill = 0; | ||||||
3362 | } | ||||||
3363 | |||||||
3364 | if (MaxBytesToFill >= Alignment) { | ||||||
3365 | Warning(MaxBytesLoc, "maximum bytes expression exceeds alignment and " | ||||||
3366 | "has no effect"); | ||||||
3367 | MaxBytesToFill = 0; | ||||||
3368 | } | ||||||
3369 | } | ||||||
3370 | |||||||
3371 | // Check whether we should use optimal code alignment for this .align | ||||||
3372 | // directive. | ||||||
3373 | const MCSection *Section = getStreamer().getCurrentSectionOnly(); | ||||||
3374 | assert(Section && "must have section to emit alignment")((Section && "must have section to emit alignment") ? static_cast<void> (0) : __assert_fail ("Section && \"must have section to emit alignment\"" , "/build/llvm-toolchain-snapshot-13~++20210306111116+7ae191f59f0f/llvm/lib/MC/MCParser/AsmParser.cpp" , 3374, __PRETTY_FUNCTION__)); | ||||||
3375 | bool UseCodeAlign = Section->UseCodeAlign(); | ||||||
3376 | if ((!HasFillExpr || Lexer.getMAI().getTextAlignFillValue() == FillExpr) && | ||||||
3377 | ValueSize == 1 && UseCodeAlign) { | ||||||
3378 | getStreamer().emitCodeAlignment(Alignment, MaxBytesToFill); | ||||||
3379 | } else { | ||||||
3380 | // FIXME: Target specific behavior about how the "extra" bytes are filled. | ||||||
3381 | getStreamer().emitValueToAlignment(Alignment, FillExpr, ValueSize, | ||||||
3382 | MaxBytesToFill); | ||||||
3383 | } | ||||||
3384 | |||||||
3385 | return ReturnVal; | ||||||
3386 | } | ||||||
3387 | |||||||
3388 | /// parseDirectiveFile | ||||||
3389 | /// ::= .file filename | ||||||
3390 | /// ::= .file number [directory] filename [md5 checksum] [source source-text] | ||||||
3391 | bool AsmParser::parseDirectiveFile(SMLoc DirectiveLoc) { | ||||||
3392 | // FIXME: I'm not sure what this is. | ||||||
3393 | int64_t FileNumber = -1; | ||||||
3394 | if (getLexer().is(AsmToken::Integer)) { | ||||||
3395 | FileNumber = getTok().getIntVal(); | ||||||
3396 | Lex(); | ||||||
3397 | |||||||
3398 | if (FileNumber < 0) | ||||||
3399 | return TokError("negative file number"); | ||||||
3400 | } | ||||||
3401 | |||||||
3402 | std::string Path; | ||||||
3403 | |||||||
3404 | // Usually the directory and filename together, otherwise just the directory. | ||||||
3405 | // Allow the strings to have escaped octal character sequence. | ||||||
3406 | if (check(getTok().isNot(AsmToken::String), | ||||||
3407 | "unexpected token in '.file' directive") || | ||||||
3408 | parseEscapedString(Path)) | ||||||
3409 | return true; | ||||||
3410 | |||||||
3411 | StringRef Directory; | ||||||
3412 | StringRef Filename; | ||||||
3413 | std::string FilenameData; | ||||||
3414 | if (getLexer().is(AsmToken::String)) { | ||||||
3415 | if (check(FileNumber == -1, | ||||||
3416 | "explicit path specified, but no file number") || | ||||||
3417 | parseEscapedString(FilenameData)) | ||||||
3418 | return true; | ||||||
3419 | Filename = FilenameData; | ||||||
3420 | Directory = Path; | ||||||
3421 | } else { | ||||||
3422 | Filename = Path; | ||||||
3423 | } | ||||||
3424 | |||||||
3425 | uint64_t MD5Hi, MD5Lo; | ||||||
3426 | bool HasMD5 = false; | ||||||
3427 | |||||||
3428 | Optional<StringRef> Source; | ||||||
3429 | bool HasSource = false; | ||||||
3430 | std::string SourceString; | ||||||
3431 | |||||||
3432 | while (!parseOptionalToken(AsmToken::EndOfStatement)) { | ||||||
3433 | StringRef Keyword; | ||||||
3434 | if (check(getTok().isNot(AsmToken::Identifier), | ||||||
3435 | "unexpected token in '.file' directive") || | ||||||
3436 | parseIdentifier(Keyword)) | ||||||
3437 | return true; | ||||||
3438 | if (Keyword == "md5") { | ||||||
3439 | HasMD5 = true; | ||||||
3440 | if (check(FileNumber == -1, | ||||||
3441 | "MD5 checksum specified, but no file number") || | ||||||
3442 | parseHexOcta(*this, MD5Hi, MD5Lo)) | ||||||
3443 | return true; | ||||||
3444 | } else if (Keyword == "source") { | ||||||
3445 | HasSource = true; | ||||||
3446 | if (check(FileNumber == -1, | ||||||
3447 | "source specified, but no file number") || | ||||||
3448 | check(getTok().isNot(AsmToken::String), | ||||||
3449 | "unexpected token in '.file' directive") || | ||||||
3450 | parseEscapedString(SourceString)) | ||||||
3451 | return true; | ||||||
3452 | } else { | ||||||
3453 | return TokError("unexpected token in '.file' directive"); | ||||||
3454 | } | ||||||
3455 | } | ||||||
3456 | |||||||
3457 | if (FileNumber == -1) { | ||||||
3458 | // Ignore the directive if there is no number and the target doesn't support | ||||||
3459 | // numberless .file directives. This allows some portability of assembler | ||||||
3460 | // between different object file formats. | ||||||
3461 | if (getContext().getAsmInfo()->hasSingleParameterDotFile()) | ||||||
3462 | getStreamer().emitFileDirective(Filename); | ||||||
3463 | } else { | ||||||
3464 | // In case there is a -g option as well as debug info from directive .file, | ||||||
3465 | // we turn off the -g option, directly use the existing debug info instead. | ||||||
3466 | // Throw away any implicit file table for the assembler source. | ||||||
3467 | if (Ctx.getGenDwarfForAssembly()) { | ||||||
3468 | Ctx.getMCDwarfLineTable(0).resetFileTable(); | ||||||
3469 | Ctx.setGenDwarfForAssembly(false); | ||||||
3470 | } | ||||||
3471 | |||||||
3472 | Optional<MD5::MD5Result> CKMem; | ||||||
3473 | if (HasMD5) { | ||||||
3474 | MD5::MD5Result Sum; | ||||||
3475 | for (unsigned i = 0; i != 8; ++i) { | ||||||
3476 | Sum.Bytes[i] = uint8_t(MD5Hi >> ((7 - i) * 8)); | ||||||
3477 | Sum.Bytes[i + 8] = uint8_t(MD5Lo >> ((7 - i) * 8)); | ||||||
3478 | } | ||||||
3479 | CKMem = Sum; | ||||||
3480 | } | ||||||
3481 | if (HasSource) { | ||||||
3482 | char *SourceBuf = static_cast<char *>(Ctx.allocate(SourceString.size())); | ||||||
3483 | memcpy(SourceBuf, SourceString.data(), SourceString.size()); | ||||||
3484 | Source = StringRef(SourceBuf, SourceString.size()); | ||||||
3485 | } | ||||||
3486 | if (FileNumber == 0) { | ||||||
3487 | // Upgrade to Version 5 for assembly actions like clang -c a.s. | ||||||
3488 | if (Ctx.getDwarfVersion() < 5) | ||||||
3489 | Ctx.setDwarfVersion(5); | ||||||
3490 | getStreamer().emitDwarfFile0Directive(Directory, Filename, CKMem, Source); | ||||||
3491 | } else { | ||||||
3492 | Expected<unsigned> FileNumOrErr = getStreamer().tryEmitDwarfFileDirective( | ||||||
3493 | FileNumber, Directory, Filename, CKMem, Source); | ||||||
3494 | if (!FileNumOrErr) | ||||||
3495 | return Error(DirectiveLoc, toString(FileNumOrErr.takeError())); | ||||||
3496 | } | ||||||
3497 | // Alert the user if there are some .file directives with MD5 and some not. | ||||||
3498 | // But only do that once. | ||||||
3499 | if (!ReportedInconsistentMD5 && !Ctx.isDwarfMD5UsageConsistent(0)) { | ||||||
3500 | ReportedInconsistentMD5 = true; | ||||||
3501 | return Warning(DirectiveLoc, "inconsistent use of MD5 checksums"); | ||||||
3502 | } | ||||||
3503 | } | ||||||
3504 | |||||||
3505 | return false; | ||||||
3506 | } | ||||||
3507 | |||||||
3508 | /// parseDirectiveLine | ||||||
3509 | /// ::= .line [number] | ||||||
3510 | bool AsmParser::parseDirectiveLine() { | ||||||
3511 | int64_t LineNumber; | ||||||
3512 | if (getLexer().is(AsmToken::Integer)) { | ||||||
3513 | if (parseIntToken(LineNumber, "unexpected token in '.line' directive")) | ||||||
3514 | return true; | ||||||
3515 | (void)LineNumber; | ||||||
3516 | // FIXME: Do something with the .line. | ||||||
3517 | } | ||||||
3518 | if (parseToken(AsmToken::EndOfStatement, | ||||||
3519 | "unexpected token in '.line' directive")) | ||||||
3520 | return true; | ||||||
3521 | |||||||
3522 | return false; | ||||||
3523 | } | ||||||
3524 | |||||||
3525 | /// parseDirectiveLoc | ||||||
3526 | /// ::= .loc FileNumber [LineNumber] [ColumnPos] [basic_block] [prologue_end] | ||||||
3527 | /// [epilogue_begin] [is_stmt VALUE] [isa VALUE] | ||||||
3528 | /// The first number is a file number, must have been previously assigned with | ||||||
3529 | /// a .file directive, the second number is the line number and optionally the | ||||||
3530 | /// third number is a column position (zero if not specified). The remaining | ||||||
3531 | /// optional items are .loc sub-directives. | ||||||
3532 | bool AsmParser::parseDirectiveLoc() { | ||||||
3533 | int64_t FileNumber = 0, LineNumber = 0; | ||||||
3534 | SMLoc Loc = getTok().getLoc(); | ||||||
3535 | if (parseIntToken(FileNumber, "unexpected token in '.loc' directive") || | ||||||
3536 | check(FileNumber < 1 && Ctx.getDwarfVersion() < 5, Loc, | ||||||
3537 | "file number less than one in '.loc' directive") || | ||||||
3538 | check(!getContext().isValidDwarfFileNumber(FileNumber), Loc, | ||||||
3539 | "unassigned file number in '.loc' directive")) | ||||||
3540 | return true; | ||||||
3541 | |||||||
3542 | // optional | ||||||
3543 | if (getLexer().is(AsmToken::Integer)) { | ||||||
3544 | LineNumber = getTok().getIntVal(); | ||||||
3545 | if (LineNumber < 0) | ||||||
3546 | return TokError("line number less than zero in '.loc' directive"); | ||||||
3547 | Lex(); | ||||||
3548 | } | ||||||
3549 | |||||||
3550 | int64_t ColumnPos = 0; | ||||||
3551 | if (getLexer().is(AsmToken::Integer)) { | ||||||
3552 | ColumnPos = getTok().getIntVal(); | ||||||
3553 | if (ColumnPos < 0) | ||||||
3554 | return TokError("column position less than zero in '.loc' directive"); | ||||||
3555 | Lex(); | ||||||
3556 | } | ||||||
3557 | |||||||
3558 | auto PrevFlags = getContext().getCurrentDwarfLoc().getFlags(); | ||||||
3559 | unsigned Flags = PrevFlags & DWARF2_FLAG_IS_STMT(1 << 0); | ||||||
3560 | unsigned Isa = 0; | ||||||
3561 | int64_t Discriminator = 0; | ||||||
3562 | |||||||
3563 | auto parseLocOp = [&]() -> bool { | ||||||
3564 | StringRef Name; | ||||||
3565 | SMLoc Loc = getTok().getLoc(); | ||||||
3566 | if (parseIdentifier(Name)) | ||||||
3567 | return TokError("unexpected token in '.loc' directive"); | ||||||
3568 | |||||||
3569 | if (Name == "basic_block") | ||||||
3570 | Flags |= DWARF2_FLAG_BASIC_BLOCK(1 << 1); | ||||||
3571 | else if (Name == "prologue_end") | ||||||
3572 | Flags |= DWARF2_FLAG_PROLOGUE_END(1 << 2); | ||||||
3573 | else if (Name == "epilogue_begin") | ||||||
3574 | Flags |= DWARF2_FLAG_EPILOGUE_BEGIN(1 << 3); | ||||||
3575 | else if (Name == "is_stmt") { | ||||||
3576 | Loc = getTok().getLoc(); | ||||||
3577 | const MCExpr *Value; | ||||||
3578 | if (parseExpression(Value)) | ||||||
3579 | return true; | ||||||
3580 | // The expression must be the constant 0 or 1. | ||||||
3581 | if (const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Value)) { | ||||||
3582 | int Value = MCE->getValue(); | ||||||
3583 | if (Value == 0) | ||||||
3584 | Flags &= ~DWARF2_FLAG_IS_STMT(1 << 0); | ||||||
3585 | else if (Value == 1) | ||||||
3586 | Flags |= DWARF2_FLAG_IS_STMT(1 << 0); | ||||||
3587 | else | ||||||
3588 | return Error(Loc, "is_stmt value not 0 or 1"); | ||||||
3589 | } else { | ||||||
3590 | return Error(Loc, "is_stmt value not the constant value of 0 or 1"); | ||||||
3591 | } | ||||||
3592 | } else if (Name == "isa") { | ||||||
3593 | Loc = getTok().getLoc(); | ||||||
3594 | const MCExpr *Value; | ||||||
3595 | if (parseExpression(Value)) | ||||||
3596 | return true; | ||||||
3597 | // The expression must be a constant greater or equal to 0. | ||||||
3598 | if (const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Value)) { | ||||||
3599 | int Value = MCE->getValue(); | ||||||
3600 | if (Value < 0) | ||||||
3601 | return Error(Loc, "isa number less than zero"); | ||||||
3602 | Isa = Value; | ||||||
3603 | } else { | ||||||
3604 | return Error(Loc, "isa number not a constant value"); | ||||||
3605 | } | ||||||
3606 | } else if (Name == "discriminator") { | ||||||
3607 | if (parseAbsoluteExpression(Discriminator)) | ||||||
3608 | return true; | ||||||
3609 | } else { | ||||||
3610 | return Error(Loc, "unknown sub-directive in '.loc' directive"); | ||||||
3611 | } | ||||||
3612 | return false; | ||||||
3613 | }; | ||||||
3614 | |||||||
3615 | if (parseMany(parseLocOp, false /*hasComma*/)) | ||||||
3616 | return true; | ||||||
3617 | |||||||
3618 | getStreamer().emitDwarfLocDirective(FileNumber, LineNumber, ColumnPos, Flags, | ||||||
3619 | Isa, Discriminator, StringRef()); | ||||||
3620 | |||||||
3621 | return false; | ||||||
3622 | } | ||||||
3623 | |||||||
3624 | /// parseDirectiveStabs | ||||||
3625 | /// ::= .stabs string, number, number, number | ||||||
3626 | bool AsmParser::parseDirectiveStabs() { | ||||||
3627 | return TokError("unsupported directive '.stabs'"); | ||||||
3628 | } | ||||||
3629 | |||||||
3630 | /// parseDirectiveCVFile | ||||||
3631 | /// ::= .cv_file number filename [checksum] [checksumkind] | ||||||
3632 | bool AsmParser::parseDirectiveCVFile() { | ||||||
3633 | SMLoc FileNumberLoc = getTok().getLoc(); | ||||||
3634 | int64_t FileNumber; | ||||||
3635 | std::string Filename; | ||||||
3636 | std::string Checksum; | ||||||
3637 | int64_t ChecksumKind = 0; | ||||||
3638 | |||||||
3639 | if (parseIntToken(FileNumber, | ||||||
3640 | "expected file number in '.cv_file' directive") || | ||||||
3641 | check(FileNumber < 1, FileNumberLoc, "file number less than one") || | ||||||
3642 | check(getTok().isNot(AsmToken::String), | ||||||
3643 | "unexpected token in '.cv_file' directive") || | ||||||
3644 | parseEscapedString(Filename)) | ||||||
3645 | return true; | ||||||
3646 | if (!parseOptionalToken(AsmToken::EndOfStatement)) { | ||||||
3647 | if (check(getTok().isNot(AsmToken::String), | ||||||
3648 | "unexpected token in '.cv_file' directive") || | ||||||
3649 | parseEscapedString(Checksum) || | ||||||
3650 | parseIntToken(ChecksumKind, | ||||||
3651 | "expected checksum kind in '.cv_file' directive") || | ||||||
3652 | parseToken(AsmToken::EndOfStatement, | ||||||
3653 | "unexpected token in '.cv_file' directive")) | ||||||
3654 | return true; | ||||||
3655 | } | ||||||
3656 | |||||||
3657 | Checksum = fromHex(Checksum); | ||||||
3658 | void *CKMem = Ctx.allocate(Checksum.size(), 1); | ||||||
3659 | memcpy(CKMem, Checksum.data(), Checksum.size()); | ||||||
3660 | ArrayRef<uint8_t> ChecksumAsBytes(reinterpret_cast<const uint8_t *>(CKMem), | ||||||
3661 | Checksum.size()); | ||||||
3662 | |||||||
3663 | if (!getStreamer().EmitCVFileDirective(FileNumber, Filename, ChecksumAsBytes, | ||||||
3664 | static_cast<uint8_t>(ChecksumKind))) | ||||||
3665 | return Error(FileNumberLoc, "file number already allocated"); | ||||||
3666 | |||||||
3667 | return false; | ||||||
3668 | } | ||||||
3669 | |||||||
3670 | bool AsmParser::parseCVFunctionId(int64_t &FunctionId, | ||||||
3671 | StringRef DirectiveName) { | ||||||
3672 | SMLoc Loc; | ||||||
3673 | return parseTokenLoc(Loc) || | ||||||
3674 | parseIntToken(FunctionId, "expected function id in '" + DirectiveName + | ||||||
3675 | "' directive") || | ||||||
3676 | check(FunctionId < 0 || FunctionId >= UINT_MAX(2147483647 *2U +1U), Loc, | ||||||
3677 | "expected function id within range [0, UINT_MAX)"); | ||||||
3678 | } | ||||||
3679 | |||||||
3680 | bool AsmParser::parseCVFileId(int64_t &FileNumber, StringRef DirectiveName) { | ||||||
3681 | SMLoc Loc; | ||||||
3682 | return parseTokenLoc(Loc) || | ||||||
3683 | parseIntToken(FileNumber, "expected integer in '" + DirectiveName + | ||||||
3684 | "' directive") || | ||||||
3685 | check(FileNumber < 1, Loc, "file number less than one in '" + | ||||||
3686 | DirectiveName + "' directive") || | ||||||
3687 | check(!getCVContext().isValidFileNumber(FileNumber), Loc, | ||||||
3688 | "unassigned file number in '" + DirectiveName + "' directive"); | ||||||
3689 | } | ||||||
3690 | |||||||
3691 | /// parseDirectiveCVFuncId | ||||||
3692 | /// ::= .cv_func_id FunctionId | ||||||
3693 | /// | ||||||
3694 | /// Introduces a function ID that can be used with .cv_loc. | ||||||
3695 | bool AsmParser::parseDirectiveCVFuncId() { | ||||||
3696 | SMLoc FunctionIdLoc = getTok().getLoc(); | ||||||
3697 | int64_t FunctionId; | ||||||
3698 | |||||||
3699 | if (parseCVFunctionId(FunctionId, ".cv_func_id") || | ||||||
3700 | parseToken(AsmToken::EndOfStatement, | ||||||
3701 | "unexpected token in '.cv_func_id' directive")) | ||||||
3702 | return true; | ||||||
3703 | |||||||
3704 | if (!getStreamer().EmitCVFuncIdDirective(FunctionId)) | ||||||
3705 | return Error(FunctionIdLoc, "function id already allocated"); | ||||||
3706 | |||||||
3707 | return false; | ||||||
3708 | } | ||||||
3709 | |||||||
3710 | /// parseDirectiveCVInlineSiteId | ||||||
3711 | /// ::= .cv_inline_site_id FunctionId | ||||||
3712 | /// "within" IAFunc | ||||||
3713 | /// "inlined_at" IAFile IALine [IACol] | ||||||
3714 | /// | ||||||
3715 | /// Introduces a function ID that can be used with .cv_loc. Includes "inlined | ||||||
3716 | /// at" source location information for use in the line table of the caller, | ||||||
3717 | /// whether the caller is a real function or another inlined call site. | ||||||
3718 | bool AsmParser::parseDirectiveCVInlineSiteId() { | ||||||
3719 | SMLoc FunctionIdLoc = getTok().getLoc(); | ||||||
3720 | int64_t FunctionId; | ||||||
3721 | int64_t IAFunc; | ||||||
3722 | int64_t IAFile; | ||||||
3723 | int64_t IALine; | ||||||
3724 | int64_t IACol = 0; | ||||||
3725 | |||||||
3726 | // FunctionId | ||||||
3727 | if (parseCVFunctionId(FunctionId, ".cv_inline_site_id")) | ||||||
3728 | return true; | ||||||
3729 | |||||||
3730 | // "within" | ||||||
3731 | if (check((getLexer().isNot(AsmToken::Identifier) || | ||||||
3732 | getTok().getIdentifier() != "within"), | ||||||
3733 | "expected 'within' identifier in '.cv_inline_site_id' directive")) | ||||||
3734 | return true; | ||||||
3735 | Lex(); | ||||||
3736 | |||||||
3737 | // IAFunc | ||||||
3738 | if (parseCVFunctionId(IAFunc, ".cv_inline_site_id")) | ||||||
3739 | return true; | ||||||
3740 | |||||||
3741 | // "inlined_at" | ||||||
3742 | if (check((getLexer().isNot(AsmToken::Identifier) || | ||||||
3743 | getTok().getIdentifier() != "inlined_at"), | ||||||
3744 | "expected 'inlined_at' identifier in '.cv_inline_site_id' " | ||||||
3745 | "directive") ) | ||||||
3746 | return true; | ||||||
3747 | Lex(); | ||||||
3748 | |||||||
3749 | // IAFile IALine | ||||||
3750 | if (parseCVFileId(IAFile, ".cv_inline_site_id") || | ||||||
3751 | parseIntToken(IALine, "expected line number after 'inlined_at'")) | ||||||
3752 | return true; | ||||||
3753 | |||||||
3754 | // [IACol] | ||||||
3755 | if (getLexer().is(AsmToken::Integer)) { | ||||||
3756 | IACol = getTok().getIntVal(); | ||||||
3757 | Lex(); | ||||||
3758 | } | ||||||
3759 | |||||||
3760 | if (parseToken(AsmToken::EndOfStatement, | ||||||
3761 | "unexpected token in '.cv_inline_site_id' directive")) | ||||||
3762 | return true; | ||||||
3763 | |||||||
3764 | if (!getStreamer().EmitCVInlineSiteIdDirective(FunctionId, IAFunc, IAFile, | ||||||
3765 | IALine, IACol, FunctionIdLoc)) | ||||||
3766 | return Error(FunctionIdLoc, "function id already allocated"); | ||||||
3767 | |||||||
3768 | return false; | ||||||
3769 | } | ||||||
3770 | |||||||
3771 | /// parseDirectiveCVLoc | ||||||
3772 | /// ::= .cv_loc FunctionId FileNumber [LineNumber] [ColumnPos] [prologue_end] | ||||||
3773 | /// [is_stmt VALUE] | ||||||
3774 | /// The first number is a file number, must have been previously assigned with | ||||||
3775 | /// a .file directive, the second number is the line number and optionally the | ||||||
3776 | /// third number is a column position (zero if not specified). The remaining | ||||||
3777 | /// optional items are .loc sub-directives. | ||||||
3778 | bool AsmParser::parseDirectiveCVLoc() { | ||||||
3779 | SMLoc DirectiveLoc = getTok().getLoc(); | ||||||
3780 | int64_t FunctionId, FileNumber; | ||||||
3781 | if (parseCVFunctionId(FunctionId, ".cv_loc") || | ||||||
3782 | parseCVFileId(FileNumber, ".cv_loc")) | ||||||
3783 | return true; | ||||||
3784 | |||||||
3785 | int64_t LineNumber = 0; | ||||||
3786 | if (getLexer().is(AsmToken::Integer)) { | ||||||
3787 | LineNumber = getTok().getIntVal(); | ||||||
3788 | if (LineNumber < 0) | ||||||
3789 | return TokError("line number less than zero in '.cv_loc' directive"); | ||||||
3790 | Lex(); | ||||||
3791 | } | ||||||
3792 | |||||||
3793 | int64_t ColumnPos = 0; | ||||||
3794 | if (getLexer().is(AsmToken::Integer)) { | ||||||
3795 | ColumnPos = getTok().getIntVal(); | ||||||
3796 | if (ColumnPos < 0) | ||||||
3797 | return TokError("column position less than zero in '.cv_loc' directive"); | ||||||
3798 | Lex(); | ||||||
3799 | } | ||||||
3800 | |||||||
3801 | bool PrologueEnd = false; | ||||||
3802 | uint64_t IsStmt = 0; | ||||||
3803 | |||||||
3804 | auto parseOp = [&]() -> bool { | ||||||
3805 | StringRef Name; | ||||||
3806 | SMLoc Loc = getTok().getLoc(); | ||||||
3807 | if (parseIdentifier(Name)) | ||||||
3808 | return TokError("unexpected token in '.cv_loc' directive"); | ||||||
3809 | if (Name == "prologue_end") | ||||||
3810 | PrologueEnd = true; | ||||||
3811 | else if (Name == "is_stmt") { | ||||||
3812 | Loc = getTok().getLoc(); | ||||||
3813 | const MCExpr *Value; | ||||||
3814 | if (parseExpression(Value)) | ||||||
3815 | return true; | ||||||
3816 | // The expression must be the constant 0 or 1. | ||||||
3817 | IsStmt = ~0ULL; | ||||||
3818 | if (const auto *MCE = dyn_cast<MCConstantExpr>(Value)) | ||||||
3819 | IsStmt = MCE->getValue(); | ||||||
3820 | |||||||
3821 | if (IsStmt > 1) | ||||||
3822 | return Error(Loc, "is_stmt value not 0 or 1"); | ||||||
3823 | } else { | ||||||
3824 | return Error(Loc, "unknown sub-directive in '.cv_loc' directive"); | ||||||
3825 | } | ||||||
3826 | return false; | ||||||
3827 | }; | ||||||
3828 | |||||||
3829 | if (parseMany(parseOp, false /*hasComma*/)) | ||||||
3830 | return true; | ||||||
3831 | |||||||
3832 | getStreamer().emitCVLocDirective(FunctionId, FileNumber, LineNumber, | ||||||
3833 | ColumnPos, PrologueEnd, IsStmt, StringRef(), | ||||||
3834 | DirectiveLoc); | ||||||
3835 | return false; | ||||||
3836 | } | ||||||
3837 | |||||||
3838 | /// parseDirectiveCVLinetable | ||||||
3839 | /// ::= .cv_linetable FunctionId, FnStart, FnEnd | ||||||
3840 | bool AsmParser::parseDirectiveCVLinetable() { | ||||||
3841 | int64_t FunctionId; | ||||||
3842 | StringRef FnStartName, FnEndName; | ||||||
3843 | SMLoc Loc = getTok().getLoc(); | ||||||
3844 | if (parseCVFunctionId(FunctionId, ".cv_linetable") || | ||||||
3845 | parseToken(AsmToken::Comma, | ||||||
3846 | "unexpected token in '.cv_linetable' directive") || | ||||||
3847 | parseTokenLoc(Loc) || check(parseIdentifier(FnStartName), Loc, | ||||||
3848 | "expected identifier in directive") || | ||||||
3849 | parseToken(AsmToken::Comma, | ||||||
3850 | "unexpected token in '.cv_linetable' directive") || | ||||||
3851 | parseTokenLoc(Loc) || check(parseIdentifier(FnEndName), Loc, | ||||||
3852 | "expected identifier in directive")) | ||||||
3853 | return true; | ||||||
3854 | |||||||
3855 | MCSymbol *FnStartSym = getContext().getOrCreateSymbol(FnStartName); | ||||||
3856 | MCSymbol *FnEndSym = getContext().getOrCreateSymbol(FnEndName); | ||||||
3857 | |||||||
3858 | getStreamer().emitCVLinetableDirective(FunctionId, FnStartSym, FnEndSym); | ||||||
3859 | return false; | ||||||
3860 | } | ||||||
3861 | |||||||
3862 | /// parseDirectiveCVInlineLinetable | ||||||
3863 | /// ::= .cv_inline_linetable PrimaryFunctionId FileId LineNum FnStart FnEnd | ||||||
3864 | bool AsmParser::parseDirectiveCVInlineLinetable() { | ||||||
3865 | int64_t PrimaryFunctionId, SourceFileId, SourceLineNum; | ||||||
3866 | StringRef FnStartName, FnEndName; | ||||||
3867 | SMLoc Loc = getTok().getLoc(); | ||||||
3868 | if (parseCVFunctionId(PrimaryFunctionId, ".cv_inline_linetable") || | ||||||
3869 | parseTokenLoc(Loc) || | ||||||
3870 | parseIntToken( | ||||||
3871 | SourceFileId, | ||||||
3872 | "expected SourceField in '.cv_inline_linetable' directive") || | ||||||
3873 | check(SourceFileId <= 0, Loc, | ||||||
3874 | "File id less than zero in '.cv_inline_linetable' directive") || | ||||||
3875 | parseTokenLoc(Loc) || | ||||||
3876 | parseIntToken( | ||||||
3877 | SourceLineNum, | ||||||
3878 | "expected SourceLineNum in '.cv_inline_linetable' directive") || | ||||||
3879 | check(SourceLineNum < 0, Loc, | ||||||
3880 | "Line number less than zero in '.cv_inline_linetable' directive") || | ||||||
3881 | parseTokenLoc(Loc) || check(parseIdentifier(FnStartName), Loc, | ||||||
3882 | "expected identifier in directive") || | ||||||
3883 | parseTokenLoc(Loc) || check(parseIdentifier(FnEndName), Loc, | ||||||
3884 | "expected identifier in directive")) | ||||||
3885 | return true; | ||||||
3886 | |||||||
3887 | if (parseToken(AsmToken::EndOfStatement, "Expected End of Statement")) | ||||||
3888 | return true; | ||||||
3889 | |||||||
3890 | MCSymbol *FnStartSym = getContext().getOrCreateSymbol(FnStartName); | ||||||
3891 | MCSymbol *FnEndSym = getContext().getOrCreateSymbol(FnEndName); | ||||||
3892 | getStreamer().emitCVInlineLinetableDirective(PrimaryFunctionId, SourceFileId, | ||||||
3893 | SourceLineNum, FnStartSym, | ||||||
3894 | FnEndSym); | ||||||
3895 | return false; | ||||||
3896 | } | ||||||
3897 | |||||||
3898 | void AsmParser::initializeCVDefRangeTypeMap() { | ||||||
3899 | CVDefRangeTypeMap["reg"] = CVDR_DEFRANGE_REGISTER; | ||||||
3900 | CVDefRangeTypeMap["frame_ptr_rel"] = CVDR_DEFRANGE_FRAMEPOINTER_REL; | ||||||
3901 | CVDefRangeTypeMap["subfield_reg"] = CVDR_DEFRANGE_SUBFIELD_REGISTER; | ||||||
3902 | CVDefRangeTypeMap["reg_rel"] = CVDR_DEFRANGE_REGISTER_REL; | ||||||
3903 | } | ||||||
3904 | |||||||
3905 | /// parseDirectiveCVDefRange | ||||||
3906 | /// ::= .cv_def_range RangeStart RangeEnd (GapStart GapEnd)*, bytes* | ||||||
3907 | bool AsmParser::parseDirectiveCVDefRange() { | ||||||
3908 | SMLoc Loc; | ||||||
3909 | std::vector<std::pair<const MCSymbol *, const MCSymbol *>> Ranges; | ||||||
3910 | while (getLexer().is(AsmToken::Identifier)) { | ||||||
3911 | Loc = getLexer().getLoc(); | ||||||
3912 | StringRef GapStartName; | ||||||
3913 | if (parseIdentifier(GapStartName)) | ||||||
3914 | return Error(Loc, "expected identifier in directive"); | ||||||
3915 | MCSymbol *GapStartSym = getContext().getOrCreateSymbol(GapStartName); | ||||||
3916 | |||||||
3917 | Loc = getLexer().getLoc(); | ||||||
3918 | StringRef GapEndName; | ||||||
3919 | if (parseIdentifier(GapEndName)) | ||||||
3920 | return Error(Loc, "expected identifier in directive"); | ||||||
3921 | MCSymbol *GapEndSym = getContext().getOrCreateSymbol(GapEndName); | ||||||
3922 | |||||||
3923 | Ranges.push_back({GapStartSym, GapEndSym}); | ||||||
3924 | } | ||||||
3925 | |||||||
3926 | StringRef CVDefRangeTypeStr; | ||||||
3927 | if (parseToken( | ||||||
3928 | AsmToken::Comma, | ||||||
3929 | "expected comma before def_range type in .cv_def_range directive") || | ||||||
3930 | parseIdentifier(CVDefRangeTypeStr)) | ||||||
3931 | return Error(Loc, "expected def_range type in directive"); | ||||||
3932 | |||||||
3933 | StringMap<CVDefRangeType>::const_iterator CVTypeIt = | ||||||
3934 | CVDefRangeTypeMap.find(CVDefRangeTypeStr); | ||||||
3935 | CVDefRangeType CVDRType = (CVTypeIt == CVDefRangeTypeMap.end()) | ||||||
3936 | ? CVDR_DEFRANGE | ||||||
3937 | : CVTypeIt->getValue(); | ||||||
3938 | switch (CVDRType) { | ||||||
3939 | case CVDR_DEFRANGE_REGISTER: { | ||||||
3940 | int64_t DRRegister; | ||||||
3941 | if (parseToken(AsmToken::Comma, "expected comma before register number in " | ||||||
3942 | ".cv_def_range directive") || | ||||||
3943 | parseAbsoluteExpression(DRRegister)) | ||||||
3944 | return Error(Loc, "expected register number"); | ||||||
3945 | |||||||
3946 | codeview::DefRangeRegisterHeader DRHdr; | ||||||
3947 | DRHdr.Register = DRRegister; | ||||||
3948 | DRHdr.MayHaveNoName = 0; | ||||||
3949 | getStreamer().emitCVDefRangeDirective(Ranges, DRHdr); | ||||||
3950 | break; | ||||||
3951 | } | ||||||
3952 | case CVDR_DEFRANGE_FRAMEPOINTER_REL: { | ||||||
3953 | int64_t DROffset; | ||||||
3954 | if (parseToken(AsmToken::Comma, | ||||||
3955 | "expected comma before offset in .cv_def_range directive") || | ||||||
3956 | parseAbsoluteExpression(DROffset)) | ||||||
3957 | return Error(Loc, "expected offset value"); | ||||||
3958 | |||||||
3959 | codeview::DefRangeFramePointerRelHeader DRHdr; | ||||||
3960 | DRHdr.Offset = DROffset; | ||||||
3961 | getStreamer().emitCVDefRangeDirective(Ranges, DRHdr); | ||||||
3962 | break; | ||||||
3963 | } | ||||||
3964 | case CVDR_DEFRANGE_SUBFIELD_REGISTER: { | ||||||
3965 | int64_t DRRegister; | ||||||
3966 | int64_t DROffsetInParent; | ||||||
3967 | if (parseToken(AsmToken::Comma, "expected comma before register number in " | ||||||
3968 | ".cv_def_range directive") || | ||||||
3969 | parseAbsoluteExpression(DRRegister)) | ||||||
3970 | return Error(Loc, "expected register number"); | ||||||
3971 | if (parseToken(AsmToken::Comma, | ||||||
3972 | "expected comma before offset in .cv_def_range directive") || | ||||||
3973 | parseAbsoluteExpression(DROffsetInParent)) | ||||||
3974 | return Error(Loc, "expected offset value"); | ||||||
3975 | |||||||
3976 | codeview::DefRangeSubfieldRegisterHeader DRHdr; | ||||||
3977 | DRHdr.Register = DRRegister; | ||||||
3978 | DRHdr.MayHaveNoName = 0; | ||||||
3979 | DRHdr.OffsetInParent = DROffsetInParent; | ||||||
3980 | getStreamer().emitCVDefRangeDirective(Ranges, DRHdr); | ||||||
3981 | break; | ||||||
3982 | } | ||||||
3983 | case CVDR_DEFRANGE_REGISTER_REL: { | ||||||
3984 | int64_t DRRegister; | ||||||
3985 | int64_t DRFlags; | ||||||
3986 | int64_t DRBasePointerOffset; | ||||||
3987 | if (parseToken(AsmToken::Comma, "expected comma before register number in " | ||||||
3988 | ".cv_def_range directive") || | ||||||
3989 | parseAbsoluteExpression(DRRegister)) | ||||||
3990 | return Error(Loc, "expected register value"); | ||||||
3991 | if (parseToken( | ||||||
3992 | AsmToken::Comma, | ||||||
3993 | "expected comma before flag value in .cv_def_range directive") || | ||||||
3994 | parseAbsoluteExpression(DRFlags)) | ||||||
3995 | return Error(Loc, "expected flag value"); | ||||||
3996 | if (parseToken(AsmToken::Comma, "expected comma before base pointer offset " | ||||||
3997 | "in .cv_def_range directive") || | ||||||
3998 | parseAbsoluteExpression(DRBasePointerOffset)) | ||||||
3999 | return Error(Loc, "expected base pointer offset value"); | ||||||
4000 | |||||||
4001 | codeview::DefRangeRegisterRelHeader DRHdr; | ||||||
4002 | DRHdr.Register = DRRegister; | ||||||
4003 | DRHdr.Flags = DRFlags; | ||||||
4004 | DRHdr.BasePointerOffset = DRBasePointerOffset; | ||||||
4005 | getStreamer().emitCVDefRangeDirective(Ranges, DRHdr); | ||||||
4006 | break; | ||||||
4007 | } | ||||||
4008 | default: | ||||||
4009 | return Error(Loc, "unexpected def_range type in .cv_def_range directive"); | ||||||
4010 | } | ||||||
4011 | return true; | ||||||
4012 | } | ||||||
4013 | |||||||
4014 | /// parseDirectiveCVString | ||||||
4015 | /// ::= .cv_stringtable "string" | ||||||
4016 | bool AsmParser::parseDirectiveCVString() { | ||||||
4017 | std::string Data; | ||||||
4018 | if (checkForValidSection() || parseEscapedString(Data)) | ||||||
4019 | return addErrorSuffix(" in '.cv_string' directive"); | ||||||
4020 | |||||||
4021 | // Put the string in the table and emit the offset. | ||||||
4022 | std::pair<StringRef, unsigned> Insertion = | ||||||
4023 | getCVContext().addToStringTable(Data); | ||||||
4024 | getStreamer().emitInt32(Insertion.second); | ||||||
4025 | return false; | ||||||
4026 | } | ||||||
4027 | |||||||
4028 | /// parseDirectiveCVStringTable | ||||||
4029 | /// ::= .cv_stringtable | ||||||
4030 | bool AsmParser::parseDirectiveCVStringTable() { | ||||||
4031 | getStreamer().emitCVStringTableDirective(); | ||||||
4032 | return false; | ||||||
4033 | } | ||||||
4034 | |||||||
4035 | /// parseDirectiveCVFileChecksums | ||||||
4036 | /// ::= .cv_filechecksums | ||||||
4037 | bool AsmParser::parseDirectiveCVFileChecksums() { | ||||||
4038 | getStreamer().emitCVFileChecksumsDirective(); | ||||||
4039 | return false; | ||||||
4040 | } | ||||||
4041 | |||||||
4042 | /// parseDirectiveCVFileChecksumOffset | ||||||
4043 | /// ::= .cv_filechecksumoffset fileno | ||||||
4044 | bool AsmParser::parseDirectiveCVFileChecksumOffset() { | ||||||
4045 | int64_t FileNo; | ||||||
4046 | if (parseIntToken(FileNo, "expected identifier in directive")) | ||||||
4047 | return true; | ||||||
4048 | if (parseToken(AsmToken::EndOfStatement, "Expected End of Statement")) | ||||||
4049 | return true; | ||||||
4050 | getStreamer().emitCVFileChecksumOffsetDirective(FileNo); | ||||||
4051 | return false; | ||||||
4052 | } | ||||||
4053 | |||||||
4054 | /// parseDirectiveCVFPOData | ||||||
4055 | /// ::= .cv_fpo_data procsym | ||||||
4056 | bool AsmParser::parseDirectiveCVFPOData() { | ||||||
4057 | SMLoc DirLoc = getLexer().getLoc(); | ||||||
4058 | StringRef ProcName; | ||||||
4059 | if (parseIdentifier(ProcName)) | ||||||
4060 | return TokError("expected symbol name"); | ||||||
4061 | if (parseEOL("unexpected tokens")) | ||||||
4062 | return addErrorSuffix(" in '.cv_fpo_data' directive"); | ||||||
4063 | MCSymbol *ProcSym = getContext().getOrCreateSymbol(ProcName); | ||||||
4064 | getStreamer().EmitCVFPOData(ProcSym, DirLoc); | ||||||
4065 | return false; | ||||||
4066 | } | ||||||
4067 | |||||||
4068 | /// parseDirectiveCFISections | ||||||
4069 | /// ::= .cfi_sections section [, section] | ||||||
4070 | bool AsmParser::parseDirectiveCFISections() { | ||||||
4071 | StringRef Name; | ||||||
4072 | bool EH = false; | ||||||
4073 | bool Debug = false; | ||||||
4074 | |||||||
4075 | if (!parseOptionalToken(AsmToken::EndOfStatement)) { | ||||||
4076 | for (;;) { | ||||||
4077 | if (parseIdentifier(Name)) | ||||||
4078 | return TokError("expected .eh_frame or .debug_frame"); | ||||||
4079 | if (Name == ".eh_frame") | ||||||
4080 | EH = true; | ||||||
4081 | else if (Name == ".debug_frame") | ||||||
4082 | Debug = true; | ||||||
4083 | if (parseOptionalToken(AsmToken::EndOfStatement)) | ||||||
4084 | break; | ||||||
4085 | if (parseToken(AsmToken::Comma)) | ||||||
4086 | return true; | ||||||
4087 | } | ||||||
4088 | } | ||||||
4089 | getStreamer().emitCFISections(EH, Debug); | ||||||
4090 | return false; | ||||||
4091 | } | ||||||
4092 | |||||||
4093 | /// parseDirectiveCFIStartProc | ||||||
4094 | /// ::= .cfi_startproc [simple] | ||||||
4095 | bool AsmParser::parseDirectiveCFIStartProc() { | ||||||
4096 | StringRef Simple; | ||||||
4097 | if (!parseOptionalToken(AsmToken::EndOfStatement)) { | ||||||
4098 | if (check(parseIdentifier(Simple) || Simple != "simple", | ||||||
4099 | "unexpected token") || | ||||||
4100 | parseToken(AsmToken::EndOfStatement)) | ||||||
4101 | return addErrorSuffix(" in '.cfi_startproc' directive"); | ||||||
4102 | } | ||||||
4103 | |||||||
4104 | // TODO(kristina): Deal with a corner case of incorrect diagnostic context | ||||||
4105 | // being produced if this directive is emitted as part of preprocessor macro | ||||||
4106 | // expansion which can *ONLY* happen if Clang's cc1as is the API consumer. | ||||||
4107 | // Tools like llvm-mc on the other hand are not affected by it, and report | ||||||
4108 | // correct context information. | ||||||
4109 | getStreamer().emitCFIStartProc(!Simple.empty(), Lexer.getLoc()); | ||||||
4110 | return false; | ||||||
4111 | } | ||||||
4112 | |||||||
4113 | /// parseDirectiveCFIEndProc | ||||||
4114 | /// ::= .cfi_endproc | ||||||
4115 | bool AsmParser::parseDirectiveCFIEndProc() { | ||||||
4116 | if (parseToken(AsmToken::EndOfStatement)) | ||||||
4117 | return addErrorSuffix(" in '.cfi_endproc' directive"); | ||||||
4118 | getStreamer().emitCFIEndProc(); | ||||||
4119 | return false; | ||||||
4120 | } | ||||||
4121 | |||||||
4122 | /// parse register name or number. | ||||||
4123 | bool AsmParser::parseRegisterOrRegisterNumber(int64_t &Register, | ||||||
4124 | SMLoc DirectiveLoc) { | ||||||
4125 | unsigned RegNo; | ||||||
4126 | |||||||
4127 | if (getLexer().isNot(AsmToken::Integer)) { | ||||||
4128 | if (getTargetParser().ParseRegister(RegNo, DirectiveLoc, DirectiveLoc)) | ||||||
4129 | return true; | ||||||
4130 | Register = getContext().getRegisterInfo()->getDwarfRegNum(RegNo, true); | ||||||
4131 | } else | ||||||
4132 | return parseAbsoluteExpression(Register); | ||||||
4133 | |||||||
4134 | return false; | ||||||
4135 | } | ||||||
4136 | |||||||
4137 | /// parseDirectiveCFIDefCfa | ||||||
4138 | /// ::= .cfi_def_cfa register, offset | ||||||
4139 | bool AsmParser::parseDirectiveCFIDefCfa(SMLoc DirectiveLoc) { | ||||||
4140 | int64_t Register = 0, Offset = 0; | ||||||
4141 | if (parseRegisterOrRegisterNumber(Register, DirectiveLoc) || | ||||||
4142 | parseToken(AsmToken::Comma, "unexpected token in directive") || | ||||||
4143 | parseAbsoluteExpression(Offset)) | ||||||
4144 | return true; | ||||||
4145 | |||||||
4146 | getStreamer().emitCFIDefCfa(Register, Offset); | ||||||
4147 | return false; | ||||||
4148 | } | ||||||
4149 | |||||||
4150 | /// parseDirectiveCFIDefCfaOffset | ||||||
4151 | /// ::= .cfi_def_cfa_offset offset | ||||||
4152 | bool AsmParser::parseDirectiveCFIDefCfaOffset() { | ||||||
4153 | int64_t Offset = 0; | ||||||
4154 | if (parseAbsoluteExpression(Offset)) | ||||||
4155 | return true; | ||||||
4156 | |||||||
4157 | getStreamer().emitCFIDefCfaOffset(Offset); | ||||||
4158 | return false; | ||||||
4159 | } | ||||||
4160 | |||||||
4161 | /// parseDirectiveCFIRegister | ||||||
4162 | /// ::= .cfi_register register, register | ||||||
4163 | bool AsmParser::parseDirectiveCFIRegister(SMLoc DirectiveLoc) { | ||||||
4164 | int64_t Register1 = 0, Register2 = 0; | ||||||
4165 | if (parseRegisterOrRegisterNumber(Register1, DirectiveLoc) || | ||||||
4166 | parseToken(AsmToken::Comma, "unexpected token in directive") || | ||||||
4167 | parseRegisterOrRegisterNumber(Register2, DirectiveLoc)) | ||||||
4168 | return true; | ||||||
4169 | |||||||
4170 | getStreamer().emitCFIRegister(Register1, Register2); | ||||||
4171 | return false; | ||||||
4172 | } | ||||||
4173 | |||||||
4174 | /// parseDirectiveCFIWindowSave | ||||||
4175 | /// ::= .cfi_window_save | ||||||
4176 | bool AsmParser::parseDirectiveCFIWindowSave() { | ||||||
4177 | getStreamer().emitCFIWindowSave(); | ||||||
4178 | return false; | ||||||
4179 | } | ||||||
4180 | |||||||
4181 | /// parseDirectiveCFIAdjustCfaOffset | ||||||
4182 | /// ::= .cfi_adjust_cfa_offset adjustment | ||||||
4183 | bool AsmParser::parseDirectiveCFIAdjustCfaOffset() { | ||||||
4184 | int64_t Adjustment = 0; | ||||||
4185 | if (parseAbsoluteExpression(Adjustment)) | ||||||
4186 | return true; | ||||||
4187 | |||||||
4188 | getStreamer().emitCFIAdjustCfaOffset(Adjustment); | ||||||
4189 | return false; | ||||||
4190 | } | ||||||
4191 | |||||||
4192 | /// parseDirectiveCFIDefCfaRegister | ||||||
4193 | /// ::= .cfi_def_cfa_register register | ||||||
4194 | bool AsmParser::parseDirectiveCFIDefCfaRegister(SMLoc DirectiveLoc) { | ||||||
4195 | int64_t Register = 0; | ||||||
4196 | if (parseRegisterOrRegisterNumber(Register, DirectiveLoc)) | ||||||
4197 | return true; | ||||||
4198 | |||||||
4199 | getStreamer().emitCFIDefCfaRegister(Register); | ||||||
4200 | return false; | ||||||
4201 | } | ||||||
4202 | |||||||
4203 | /// parseDirectiveCFIOffset | ||||||
4204 | /// ::= .cfi_offset register, offset | ||||||
4205 | bool AsmParser::parseDirectiveCFIOffset(SMLoc DirectiveLoc) { | ||||||
4206 | int64_t Register = 0; | ||||||
4207 | int64_t Offset = 0; | ||||||
4208 | |||||||
4209 | if (parseRegisterOrRegisterNumber(Register, DirectiveLoc) || | ||||||
4210 | parseToken(AsmToken::Comma, "unexpected token in directive") || | ||||||
4211 | parseAbsoluteExpression(Offset)) | ||||||
4212 | return true; | ||||||
4213 | |||||||
4214 | getStreamer().emitCFIOffset(Register, Offset); | ||||||
4215 | return false; | ||||||
4216 | } | ||||||
4217 | |||||||
4218 | /// parseDirectiveCFIRelOffset | ||||||
4219 | /// ::= .cfi_rel_offset register, offset | ||||||
4220 | bool AsmParser::parseDirectiveCFIRelOffset(SMLoc DirectiveLoc) { | ||||||
4221 | int64_t Register = 0, Offset = 0; | ||||||
4222 | |||||||
4223 | if (parseRegisterOrRegisterNumber(Register, DirectiveLoc) || | ||||||
4224 | parseToken(AsmToken::Comma, "unexpected token in directive") || | ||||||
4225 | parseAbsoluteExpression(Offset)) | ||||||
4226 | return true; | ||||||
4227 | |||||||
4228 | getStreamer().emitCFIRelOffset(Register, Offset); | ||||||
4229 | return false; | ||||||
4230 | } | ||||||
4231 | |||||||
4232 | static bool isValidEncoding(int64_t Encoding) { | ||||||
4233 | if (Encoding & ~0xff) | ||||||
4234 | return false; | ||||||
4235 | |||||||
4236 | if (Encoding == dwarf::DW_EH_PE_omit) | ||||||
4237 | return true; | ||||||
4238 | |||||||
4239 | const unsigned Format = Encoding & 0xf; | ||||||
4240 | if (Format != dwarf::DW_EH_PE_absptr && Format != dwarf::DW_EH_PE_udata2 && | ||||||
4241 | Format != dwarf::DW_EH_PE_udata4 && Format != dwarf::DW_EH_PE_udata8 && | ||||||
4242 | Format != dwarf::DW_EH_PE_sdata2 && Format != dwarf::DW_EH_PE_sdata4 && | ||||||
4243 | Format != dwarf::DW_EH_PE_sdata8 && Format != dwarf::DW_EH_PE_signed) | ||||||
4244 | return false; | ||||||
4245 | |||||||
4246 | const unsigned Application = Encoding & 0x70; | ||||||
4247 | if (Application != dwarf::DW_EH_PE_absptr && | ||||||
4248 | Application != dwarf::DW_EH_PE_pcrel) | ||||||
4249 | return false; | ||||||
4250 | |||||||
4251 | return true; | ||||||
4252 | } | ||||||
4253 | |||||||
4254 | /// parseDirectiveCFIPersonalityOrLsda | ||||||
4255 | /// IsPersonality true for cfi_personality, false for cfi_lsda | ||||||
4256 | /// ::= .cfi_personality encoding, [symbol_name] | ||||||
4257 | /// ::= .cfi_lsda encoding, [symbol_name] | ||||||
4258 | bool AsmParser::parseDirectiveCFIPersonalityOrLsda(bool IsPersonality) { | ||||||
4259 | int64_t Encoding = 0; | ||||||
4260 | if (parseAbsoluteExpression(Encoding)) | ||||||
4261 | return true; | ||||||
4262 | if (Encoding == dwarf::DW_EH_PE_omit) | ||||||
4263 | return false; | ||||||
4264 | |||||||
4265 | StringRef Name; | ||||||
4266 | if (check(!isValidEncoding(Encoding), "unsupported encoding.") || | ||||||
4267 | parseToken(AsmToken::Comma, "unexpected token in directive") || | ||||||
4268 | check(parseIdentifier(Name), "expected identifier in directive")) | ||||||
4269 | return true; | ||||||
4270 | |||||||
4271 | MCSymbol *Sym = getContext().getOrCreateSymbol(Name); | ||||||
4272 | |||||||
4273 | if (IsPersonality) | ||||||
4274 | getStreamer().emitCFIPersonality(Sym, Encoding); | ||||||
4275 | else | ||||||
4276 | getStreamer().emitCFILsda(Sym, Encoding); | ||||||
4277 | return false; | ||||||
4278 | } | ||||||
4279 | |||||||
4280 | /// parseDirectiveCFIRememberState | ||||||
4281 | /// ::= .cfi_remember_state | ||||||
4282 | bool AsmParser::parseDirectiveCFIRememberState() { | ||||||
4283 | getStreamer().emitCFIRememberState(); | ||||||
4284 | return false; | ||||||
4285 | } | ||||||
4286 | |||||||
4287 | /// parseDirectiveCFIRestoreState | ||||||
4288 | /// ::= .cfi_remember_state | ||||||
4289 | bool AsmParser::parseDirectiveCFIRestoreState() { | ||||||
4290 | getStreamer().emitCFIRestoreState(); | ||||||
4291 | return false; | ||||||
4292 | } | ||||||
4293 | |||||||
4294 | /// parseDirectiveCFISameValue | ||||||
4295 | /// ::= .cfi_same_value register | ||||||
4296 | bool AsmParser::parseDirectiveCFISameValue(SMLoc DirectiveLoc) { | ||||||
4297 | int64_t Register = 0; | ||||||
4298 | |||||||
4299 | if (parseRegisterOrRegisterNumber(Register, DirectiveLoc)) | ||||||
4300 | return true; | ||||||
4301 | |||||||
4302 | getStreamer().emitCFISameValue(Register); | ||||||
4303 | return false; | ||||||
4304 | } | ||||||
4305 | |||||||
4306 | /// parseDirectiveCFIRestore | ||||||
4307 | /// ::= .cfi_restore register | ||||||
4308 | bool AsmParser::parseDirectiveCFIRestore(SMLoc DirectiveLoc) { | ||||||
4309 | int64_t Register = 0; | ||||||
4310 | if (parseRegisterOrRegisterNumber(Register, DirectiveLoc)) | ||||||
4311 | return true; | ||||||
4312 | |||||||
4313 | getStreamer().emitCFIRestore(Register); | ||||||
4314 | return false; | ||||||
4315 | } | ||||||
4316 | |||||||
4317 | /// parseDirectiveCFIEscape | ||||||
4318 | /// ::= .cfi_escape expression[,...] | ||||||
4319 | bool AsmParser::parseDirectiveCFIEscape() { | ||||||
4320 | std::string Values; | ||||||
4321 | int64_t CurrValue; | ||||||
4322 | if (parseAbsoluteExpression(CurrValue)) | ||||||
4323 | return true; | ||||||
4324 | |||||||
4325 | Values.push_back((uint8_t)CurrValue); | ||||||
4326 | |||||||
4327 | while (getLexer().is(AsmToken::Comma)) { | ||||||
4328 | Lex(); | ||||||
4329 | |||||||
4330 | if (parseAbsoluteExpression(CurrValue)) | ||||||
4331 | return true; | ||||||
4332 | |||||||
4333 | Values.push_back((uint8_t)CurrValue); | ||||||
4334 | } | ||||||
4335 | |||||||
4336 | getStreamer().emitCFIEscape(Values); | ||||||
4337 | return false; | ||||||
4338 | } | ||||||
4339 | |||||||
4340 | /// parseDirectiveCFIReturnColumn | ||||||
4341 | /// ::= .cfi_return_column register | ||||||
4342 | bool AsmParser::parseDirectiveCFIReturnColumn(SMLoc DirectiveLoc) { | ||||||
4343 | int64_t Register = 0; | ||||||
4344 | if (parseRegisterOrRegisterNumber(Register, DirectiveLoc)) | ||||||
4345 | return true; | ||||||
4346 | getStreamer().emitCFIReturnColumn(Register); | ||||||
4347 | return false; | ||||||
4348 | } | ||||||
4349 | |||||||
4350 | /// parseDirectiveCFISignalFrame | ||||||
4351 | /// ::= .cfi_signal_frame | ||||||
4352 | bool AsmParser::parseDirectiveCFISignalFrame() { | ||||||
4353 | if (parseToken(AsmToken::EndOfStatement, | ||||||
4354 | "unexpected token in '.cfi_signal_frame'")) | ||||||
4355 | return true; | ||||||
4356 | |||||||
4357 | getStreamer().emitCFISignalFrame(); | ||||||
4358 | return false; | ||||||
4359 | } | ||||||
4360 | |||||||
4361 | /// parseDirectiveCFIUndefined | ||||||
4362 | /// ::= .cfi_undefined register | ||||||
4363 | bool AsmParser::parseDirectiveCFIUndefined(SMLoc DirectiveLoc) { | ||||||
4364 | int64_t Register = 0; | ||||||
4365 | |||||||
4366 | if (parseRegisterOrRegisterNumber(Register, DirectiveLoc)) | ||||||
4367 | return true; | ||||||
4368 | |||||||
4369 | getStreamer().emitCFIUndefined(Register); | ||||||
4370 | return false; | ||||||
4371 | } | ||||||
4372 | |||||||
4373 | /// parseDirectiveAltmacro | ||||||
4374 | /// ::= .altmacro | ||||||
4375 | /// ::= .noaltmacro | ||||||
4376 | bool AsmParser::parseDirectiveAltmacro(StringRef Directive) { | ||||||
4377 | if (getLexer().isNot(AsmToken::EndOfStatement)) | ||||||
4378 | return TokError("unexpected token in '" + Directive + "' directive"); | ||||||
4379 | AltMacroMode = (Directive == ".altmacro"); | ||||||
4380 | return false; | ||||||
4381 | } | ||||||
4382 | |||||||
4383 | /// parseDirectiveMacrosOnOff | ||||||
4384 | /// ::= .macros_on | ||||||
4385 | /// ::= .macros_off | ||||||
4386 | bool AsmParser::parseDirectiveMacrosOnOff(StringRef Directive) { | ||||||
4387 | if (parseToken(AsmToken::EndOfStatement, | ||||||
4388 | "unexpected token in '" + Directive + "' directive")) | ||||||
4389 | return true; | ||||||
4390 | |||||||
4391 | setMacrosEnabled(Directive == ".macros_on"); | ||||||
4392 | return false; | ||||||
4393 | } | ||||||
4394 | |||||||
4395 | /// parseDirectiveMacro | ||||||
4396 | /// ::= .macro name[,] [parameters] | ||||||
4397 | bool AsmParser::parseDirectiveMacro(SMLoc DirectiveLoc) { | ||||||
4398 | StringRef Name; | ||||||
4399 | if (parseIdentifier(Name)) | ||||||
4400 | return TokError("expected identifier in '.macro' directive"); | ||||||
4401 | |||||||
4402 | if (getLexer().is(AsmToken::Comma)) | ||||||
4403 | Lex(); | ||||||
4404 | |||||||
4405 | MCAsmMacroParameters Parameters; | ||||||
4406 | while (getLexer().isNot(AsmToken::EndOfStatement)) { | ||||||
4407 | |||||||
4408 | if (!Parameters.empty() && Parameters.back().Vararg) | ||||||
4409 | return Error(Lexer.getLoc(), "vararg parameter '" + | ||||||
4410 | Parameters.back().Name + | ||||||
4411 | "' should be the last parameter"); | ||||||
4412 | |||||||
4413 | MCAsmMacroParameter Parameter; | ||||||
4414 | if (parseIdentifier(Parameter.Name)) | ||||||
4415 | return TokError("expected identifier in '.macro' directive"); | ||||||
4416 | |||||||
4417 | // Emit an error if two (or more) named parameters share the same name | ||||||
4418 | for (const MCAsmMacroParameter& CurrParam : Parameters) | ||||||
4419 | if (CurrParam.Name.equals(Parameter.Name)) | ||||||
4420 | return TokError("macro '" + Name + "' has multiple parameters" | ||||||
4421 | " named '" + Parameter.Name + "'"); | ||||||
4422 | |||||||
4423 | if (Lexer.is(AsmToken::Colon)) { | ||||||
4424 | Lex(); // consume ':' | ||||||
4425 | |||||||
4426 | SMLoc QualLoc; | ||||||
4427 | StringRef Qualifier; | ||||||
4428 | |||||||
4429 | QualLoc = Lexer.getLoc(); | ||||||
4430 | if (parseIdentifier(Qualifier)) | ||||||
4431 | return Error(QualLoc, "missing parameter qualifier for " | ||||||
4432 | "'" + Parameter.Name + "' in macro '" + Name + "'"); | ||||||
4433 | |||||||
4434 | if (Qualifier == "req") | ||||||
4435 | Parameter.Required = true; | ||||||
4436 | else if (Qualifier == "vararg") | ||||||
4437 | Parameter.Vararg = true; | ||||||
4438 | else | ||||||
4439 | return Error(QualLoc, Qualifier + " is not a valid parameter qualifier " | ||||||
4440 | "for '" + Parameter.Name + "' in macro '" + Name + "'"); | ||||||
4441 | } | ||||||
4442 | |||||||
4443 | if (getLexer().is(AsmToken::Equal)) { | ||||||
4444 | Lex(); | ||||||
4445 | |||||||
4446 | SMLoc ParamLoc; | ||||||
4447 | |||||||
4448 | ParamLoc = Lexer.getLoc(); | ||||||
4449 | if (parseMacroArgument(Parameter.Value, /*Vararg=*/false )) | ||||||
4450 | return true; | ||||||
4451 | |||||||
4452 | if (Parameter.Required) | ||||||
4453 | Warning(ParamLoc, "pointless default value for required parameter " | ||||||
4454 | "'" + Parameter.Name + "' in macro '" + Name + "'"); | ||||||
4455 | } | ||||||
4456 | |||||||
4457 | Parameters.push_back(std::move(Parameter)); | ||||||
4458 | |||||||
4459 | if (getLexer().is(AsmToken::Comma)) | ||||||
4460 | Lex(); | ||||||
4461 | } | ||||||
4462 | |||||||
4463 | // Eat just the end of statement. | ||||||
4464 | Lexer.Lex(); | ||||||
4465 | |||||||
4466 | // Consuming deferred text, so use Lexer.Lex to ignore Lexing Errors | ||||||
4467 | AsmToken EndToken, StartToken = getTok(); | ||||||
4468 | unsigned MacroDepth = 0; | ||||||
4469 | // Lex the macro definition. | ||||||
4470 | while (true) { | ||||||
4471 | // Ignore Lexing errors in macros. | ||||||
4472 | while (Lexer.is(AsmToken::Error)) { | ||||||
4473 | Lexer.Lex(); | ||||||
4474 | } | ||||||
4475 | |||||||
4476 | // Check whether we have reached the end of the file. | ||||||
4477 | if (getLexer().is(AsmToken::Eof)) | ||||||
4478 | return Error(DirectiveLoc, "no matching '.endmacro' in definition"); | ||||||
4479 | |||||||
4480 | // Otherwise, check whether we have reach the .endmacro or the start of a | ||||||
4481 | // preprocessor line marker. | ||||||
4482 | if (getLexer().is(AsmToken::Identifier)) { | ||||||
4483 | if (getTok().getIdentifier() == ".endm" || | ||||||
4484 | getTok().getIdentifier() == ".endmacro") { | ||||||
4485 | if (MacroDepth == 0) { // Outermost macro. | ||||||
4486 | EndToken = getTok(); | ||||||
4487 | Lexer.Lex(); | ||||||
4488 | if (getLexer().isNot(AsmToken::EndOfStatement)) | ||||||
4489 | return TokError("unexpected token in '" + EndToken.getIdentifier() + | ||||||
4490 | "' directive"); | ||||||
4491 | break; | ||||||
4492 | } else { | ||||||
4493 | // Otherwise we just found the end of an inner macro. | ||||||
4494 | --MacroDepth; | ||||||
4495 | } | ||||||
4496 | } else if (getTok().getIdentifier() == ".macro") { | ||||||
4497 | // We allow nested macros. Those aren't instantiated until the outermost | ||||||
4498 | // macro is expanded so just ignore them for now. | ||||||
4499 | ++MacroDepth; | ||||||
4500 | } | ||||||
4501 | } else if (Lexer.is(AsmToken::HashDirective)) { | ||||||
4502 | (void)parseCppHashLineFilenameComment(getLexer().getLoc()); | ||||||
4503 | } | ||||||
4504 | |||||||
4505 | // Otherwise, scan til the end of the statement. | ||||||
4506 | eatToEndOfStatement(); | ||||||
4507 | } | ||||||
4508 | |||||||
4509 | if (getContext().lookupMacro(Name)) { | ||||||
4510 | return Error(DirectiveLoc, "macro '" + Name + "' is already defined"); | ||||||
4511 | } | ||||||
4512 | |||||||
4513 | const char *BodyStart = StartToken.getLoc().getPointer(); | ||||||
4514 | const char *BodyEnd = EndToken.getLoc().getPointer(); | ||||||
4515 | StringRef Body = StringRef(BodyStart, BodyEnd - BodyStart); | ||||||
4516 | checkForBadMacro(DirectiveLoc, Name, Body, Parameters); | ||||||
4517 | MCAsmMacro Macro(Name, Body, std::move(Parameters)); | ||||||
4518 | DEBUG_WITH_TYPE("asm-macros", dbgs() << "Defining new macro:\n";do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("asm-macros")) { dbgs() << "Defining new macro:\n"; Macro .dump(); } } while (false) | ||||||
4519 | Macro.dump())do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("asm-macros")) { dbgs() << "Defining new macro:\n"; Macro .dump(); } } while (false); | ||||||
4520 | getContext().defineMacro(Name, std::move(Macro)); | ||||||
4521 | return false; | ||||||
4522 | } | ||||||
4523 | |||||||
4524 | /// checkForBadMacro | ||||||
4525 | /// | ||||||
4526 | /// With the support added for named parameters there may be code out there that | ||||||
4527 | /// is transitioning from positional parameters. In versions of gas that did | ||||||
4528 | /// not support named parameters they would be ignored on the macro definition. | ||||||
4529 | /// But to support both styles of parameters this is not possible so if a macro | ||||||
4530 | /// definition has named parameters but does not use them and has what appears | ||||||
4531 | /// to be positional parameters, strings like $1, $2, ... and $n, then issue a | ||||||
4532 | /// warning that the positional parameter found in body which have no effect. | ||||||
4533 | /// Hoping the developer will either remove the named parameters from the macro | ||||||
4534 | /// definition so the positional parameters get used if that was what was | ||||||
4535 | /// intended or change the macro to use the named parameters. It is possible | ||||||
4536 | /// this warning will trigger when the none of the named parameters are used | ||||||
4537 | /// and the strings like $1 are infact to simply to be passed trough unchanged. | ||||||
4538 | void AsmParser::checkForBadMacro(SMLoc DirectiveLoc, StringRef Name, | ||||||
4539 | StringRef Body, | ||||||
4540 | ArrayRef<MCAsmMacroParameter> Parameters) { | ||||||
4541 | // If this macro is not defined with named parameters the warning we are | ||||||
4542 | // checking for here doesn't apply. | ||||||
4543 | unsigned NParameters = Parameters.size(); | ||||||
4544 | if (NParameters == 0) | ||||||
4545 | return; | ||||||
4546 | |||||||
4547 | bool NamedParametersFound = false; | ||||||
4548 | bool PositionalParametersFound = false; | ||||||
4549 | |||||||
4550 | // Look at the body of the macro for use of both the named parameters and what | ||||||
4551 | // are likely to be positional parameters. This is what expandMacro() is | ||||||
4552 | // doing when it finds the parameters in the body. | ||||||
4553 | while (!Body.empty()) { | ||||||
4554 | // Scan for the next possible parameter. | ||||||
4555 | std::size_t End = Body.size(), Pos = 0; | ||||||
4556 | for (; Pos != End; ++Pos) { | ||||||
4557 | // Check for a substitution or escape. | ||||||
4558 | // This macro is defined with parameters, look for \foo, \bar, etc. | ||||||
4559 | if (Body[Pos] == '\\' && Pos + 1 != End) | ||||||
4560 | break; | ||||||
4561 | |||||||
4562 | // This macro should have parameters, but look for $0, $1, ..., $n too. | ||||||
4563 | if (Body[Pos] != '$' || Pos + 1 == End) | ||||||
4564 | continue; | ||||||
4565 | char Next = Body[Pos + 1]; | ||||||
4566 | if (Next == '$' || Next == 'n' || | ||||||
4567 | isdigit(static_cast<unsigned char>(Next))) | ||||||
4568 | break; | ||||||
4569 | } | ||||||
4570 | |||||||
4571 | // Check if we reached the end. | ||||||
4572 | if (Pos == End) | ||||||
4573 | break; | ||||||
4574 | |||||||
4575 | if (Body[Pos] == '$') { | ||||||
4576 | switch (Body[Pos + 1]) { | ||||||
4577 | // $$ => $ | ||||||
4578 | case '$': | ||||||
4579 | break; | ||||||
4580 | |||||||
4581 | // $n => number of arguments | ||||||
4582 | case 'n': | ||||||
4583 | PositionalParametersFound = true; | ||||||
4584 | break; | ||||||
4585 | |||||||
4586 | // $[0-9] => argument | ||||||
4587 | default: { | ||||||
4588 | PositionalParametersFound = true; | ||||||
4589 | break; | ||||||
4590 | } | ||||||
4591 | } | ||||||
4592 | Pos += 2; | ||||||
4593 | } else { | ||||||
4594 | unsigned I = Pos + 1; | ||||||
4595 | while (isIdentifierChar(Body[I]) && I + 1 != End) | ||||||
4596 | ++I; | ||||||
4597 | |||||||
4598 | const char *Begin = Body.data() + Pos + 1; | ||||||
4599 | StringRef Argument(Begin, I - (Pos + 1)); | ||||||
4600 | unsigned Index = 0; | ||||||
4601 | for (; Index < NParameters; ++Index) | ||||||
4602 | if (Parameters[Index].Name == Argument) | ||||||
4603 | break; | ||||||
4604 | |||||||
4605 | if (Index == NParameters) { | ||||||
4606 | if (Body[Pos + 1] == '(' && Body[Pos + 2] == ')') | ||||||
4607 | Pos += 3; | ||||||
4608 | else { | ||||||
4609 | Pos = I; | ||||||
4610 | } | ||||||
4611 | } else { | ||||||
4612 | NamedParametersFound = true; | ||||||
4613 | Pos += 1 + Argument.size(); | ||||||
4614 | } | ||||||
4615 | } | ||||||
4616 | // Update the scan point. | ||||||
4617 | Body = Body.substr(Pos); | ||||||
4618 | } | ||||||
4619 | |||||||
4620 | if (!NamedParametersFound && PositionalParametersFound) | ||||||
4621 | Warning(DirectiveLoc, "macro defined with named parameters which are not " | ||||||
4622 | "used in macro body, possible positional parameter " | ||||||
4623 | "found in body which will have no effect"); | ||||||
4624 | } | ||||||
4625 | |||||||
4626 | /// parseDirectiveExitMacro | ||||||
4627 | /// ::= .exitm | ||||||
4628 | bool AsmParser::parseDirectiveExitMacro(StringRef Directive) { | ||||||
4629 | if (parseToken(AsmToken::EndOfStatement, | ||||||
4630 | "unexpected token in '" + Directive + "' directive")) | ||||||
4631 | return true; | ||||||
4632 | |||||||
4633 | if (!isInsideMacroInstantiation()) | ||||||
4634 | return TokError("unexpected '" + Directive + "' in file, " | ||||||
4635 | "no current macro definition"); | ||||||
4636 | |||||||
4637 | // Exit all conditionals that are active in the current macro. | ||||||
4638 | while (TheCondStack.size() != ActiveMacros.back()->CondStackDepth) { | ||||||
4639 | TheCondState = TheCondStack.back(); | ||||||
4640 | TheCondStack.pop_back(); | ||||||
4641 | } | ||||||
4642 | |||||||
4643 | handleMacroExit(); | ||||||
4644 | return false; | ||||||
4645 | } | ||||||
4646 | |||||||
4647 | /// parseDirectiveEndMacro | ||||||
4648 | /// ::= .endm | ||||||
4649 | /// ::= .endmacro | ||||||
4650 | bool AsmParser::parseDirectiveEndMacro(StringRef Directive) { | ||||||
4651 | if (getLexer().isNot(AsmToken::EndOfStatement)) | ||||||
4652 | return TokError("unexpected token in '" + Directive + "' directive"); | ||||||
4653 | |||||||
4654 | // If we are inside a macro instantiation, terminate the current | ||||||
4655 | // instantiation. | ||||||
4656 | if (isInsideMacroInstantiation()) { | ||||||
4657 | handleMacroExit(); | ||||||
4658 | return false; | ||||||
4659 | } | ||||||
4660 | |||||||
4661 | // Otherwise, this .endmacro is a stray entry in the file; well formed | ||||||
4662 | // .endmacro directives are handled during the macro definition parsing. | ||||||
4663 | return TokError("unexpected '" + Directive + "' in file, " | ||||||
4664 | "no current macro definition"); | ||||||
4665 | } | ||||||
4666 | |||||||
4667 | /// parseDirectivePurgeMacro | ||||||
4668 | /// ::= .purgem | ||||||
4669 | bool AsmParser::parseDirectivePurgeMacro(SMLoc DirectiveLoc) { | ||||||
4670 | StringRef Name; | ||||||
4671 | SMLoc Loc; | ||||||
4672 | if (parseTokenLoc(Loc) || | ||||||
4673 | check(parseIdentifier(Name), Loc, | ||||||
4674 | "expected identifier in '.purgem' directive") || | ||||||
4675 | parseToken(AsmToken::EndOfStatement, | ||||||
4676 | "unexpected token in '.purgem' directive")) | ||||||
4677 | return true; | ||||||
4678 | |||||||
4679 | if (!getContext().lookupMacro(Name)) | ||||||
4680 | return Error(DirectiveLoc, "macro '" + Name + "' is not defined"); | ||||||
4681 | |||||||
4682 | getContext().undefineMacro(Name); | ||||||
4683 | DEBUG_WITH_TYPE("asm-macros", dbgs()do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("asm-macros")) { dbgs() << "Un-defining macro: " << Name << "\n"; } } while (false) | ||||||
4684 | << "Un-defining macro: " << Name << "\n")do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("asm-macros")) { dbgs() << "Un-defining macro: " << Name << "\n"; } } while (false); | ||||||
4685 | return false; | ||||||
4686 | } | ||||||
4687 | |||||||
4688 | /// parseDirectiveBundleAlignMode | ||||||
4689 | /// ::= {.bundle_align_mode} expression | ||||||
4690 | bool AsmParser::parseDirectiveBundleAlignMode() { | ||||||
4691 | // Expect a single argument: an expression that evaluates to a constant | ||||||
4692 | // in the inclusive range 0-30. | ||||||
4693 | SMLoc ExprLoc = getLexer().getLoc(); | ||||||
4694 | int64_t AlignSizePow2; | ||||||
4695 | if (checkForValidSection() || parseAbsoluteExpression(AlignSizePow2) || | ||||||
4696 | parseToken(AsmToken::EndOfStatement, "unexpected token after expression " | ||||||
4697 | "in '.bundle_align_mode' " | ||||||
4698 | "directive") || | ||||||
4699 | check(AlignSizePow2 < 0 || AlignSizePow2 > 30, ExprLoc, | ||||||
4700 | "invalid bundle alignment size (expected between 0 and 30)")) | ||||||
4701 | return true; | ||||||
4702 | |||||||
4703 | // Because of AlignSizePow2's verified range we can safely truncate it to | ||||||
4704 | // unsigned. | ||||||
4705 | getStreamer().emitBundleAlignMode(static_cast<unsigned>(AlignSizePow2)); | ||||||
4706 | return false; | ||||||
4707 | } | ||||||
4708 | |||||||
4709 | /// parseDirectiveBundleLock | ||||||
4710 | /// ::= {.bundle_lock} [align_to_end] | ||||||
4711 | bool AsmParser::parseDirectiveBundleLock() { | ||||||
4712 | if (checkForValidSection()) | ||||||
4713 | return true; | ||||||
4714 | bool AlignToEnd = false; | ||||||
4715 | |||||||
4716 | StringRef Option; | ||||||
4717 | SMLoc Loc = getTok().getLoc(); | ||||||
4718 | const char *kInvalidOptionError = | ||||||
4719 | "invalid option for '.bundle_lock' directive"; | ||||||
4720 | |||||||
4721 | if (!parseOptionalToken(AsmToken::EndOfStatement)) { | ||||||
4722 | if (check(parseIdentifier(Option), Loc, kInvalidOptionError) || | ||||||
4723 | check(Option != "align_to_end", Loc, kInvalidOptionError) || | ||||||
4724 | parseToken(AsmToken::EndOfStatement, | ||||||
4725 | "unexpected token after '.bundle_lock' directive option")) | ||||||
4726 | return true; | ||||||
4727 | AlignToEnd = true; | ||||||
4728 | } | ||||||
4729 | |||||||
4730 | getStreamer().emitBundleLock(AlignToEnd); | ||||||
4731 | return false; | ||||||
4732 | } | ||||||
4733 | |||||||
4734 | /// parseDirectiveBundleLock | ||||||
4735 | /// ::= {.bundle_lock} | ||||||
4736 | bool AsmParser::parseDirectiveBundleUnlock() { | ||||||
4737 | if (checkForValidSection() || | ||||||
4738 | parseToken(AsmToken::EndOfStatement, | ||||||
4739 | "unexpected token in '.bundle_unlock' directive")) | ||||||
4740 | return true; | ||||||
4741 | |||||||
4742 | getStreamer().emitBundleUnlock(); | ||||||
4743 | return false; | ||||||
4744 | } | ||||||
4745 | |||||||
4746 | /// parseDirectiveSpace | ||||||
4747 | /// ::= (.skip | .space) expression [ , expression ] | ||||||
4748 | bool AsmParser::parseDirectiveSpace(StringRef IDVal) { | ||||||
4749 | SMLoc NumBytesLoc = Lexer.getLoc(); | ||||||
4750 | const MCExpr *NumBytes; | ||||||
4751 | if (checkForValidSection() || parseExpression(NumBytes)) | ||||||
4752 | return true; | ||||||
4753 | |||||||
4754 | int64_t FillExpr = 0; | ||||||
4755 | if (parseOptionalToken(AsmToken::Comma)) | ||||||
4756 | if (parseAbsoluteExpression(FillExpr)) | ||||||
4757 | return addErrorSuffix("in '" + Twine(IDVal) + "' directive"); | ||||||
4758 | if (parseToken(AsmToken::EndOfStatement)) | ||||||
4759 | return addErrorSuffix("in '" + Twine(IDVal) + "' directive"); | ||||||
4760 | |||||||
4761 | // FIXME: Sometimes the fill expr is 'nop' if it isn't supplied, instead of 0. | ||||||
4762 | getStreamer().emitFill(*NumBytes, FillExpr, NumBytesLoc); | ||||||
4763 | |||||||
4764 | return false; | ||||||
4765 | } | ||||||
4766 | |||||||
4767 | /// parseDirectiveDCB | ||||||
4768 | /// ::= .dcb.{b, l, w} expression, expression | ||||||
4769 | bool AsmParser::parseDirectiveDCB(StringRef IDVal, unsigned Size) { | ||||||
4770 | SMLoc NumValuesLoc = Lexer.getLoc(); | ||||||
4771 | int64_t NumValues; | ||||||
4772 | if (checkForValidSection() || parseAbsoluteExpression(NumValues)) | ||||||
4773 | return true; | ||||||
4774 | |||||||
4775 | if (NumValues < 0) { | ||||||
4776 | Warning(NumValuesLoc, "'" + Twine(IDVal) + "' directive with negative repeat count has no effect"); | ||||||
4777 | return false; | ||||||
4778 | } | ||||||
4779 | |||||||
4780 | if (parseToken(AsmToken::Comma, | ||||||
4781 | "unexpected token in '" + Twine(IDVal) + "' directive")) | ||||||
4782 | return true; | ||||||
4783 | |||||||
4784 | const MCExpr *Value; | ||||||
4785 | SMLoc ExprLoc = getLexer().getLoc(); | ||||||
4786 | if (parseExpression(Value)) | ||||||
4787 | return true; | ||||||
4788 | |||||||
4789 | // Special case constant expressions to match code generator. | ||||||
4790 | if (const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Value)) { | ||||||
4791 | assert(Size <= 8 && "Invalid size")((Size <= 8 && "Invalid size") ? static_cast<void > (0) : __assert_fail ("Size <= 8 && \"Invalid size\"" , "/build/llvm-toolchain-snapshot-13~++20210306111116+7ae191f59f0f/llvm/lib/MC/MCParser/AsmParser.cpp" , 4791, __PRETTY_FUNCTION__)); | ||||||
4792 | uint64_t IntValue = MCE->getValue(); | ||||||
4793 | if (!isUIntN(8 * Size, IntValue) && !isIntN(8 * Size, IntValue)) | ||||||
4794 | return Error(ExprLoc, "literal value out of range for directive"); | ||||||
4795 | for (uint64_t i = 0, e = NumValues; i != e; ++i) | ||||||
4796 | getStreamer().emitIntValue(IntValue, Size); | ||||||
4797 | } else { | ||||||
4798 | for (uint64_t i = 0, e = NumValues; i != e; ++i) | ||||||
4799 | getStreamer().emitValue(Value, Size, ExprLoc); | ||||||
4800 | } | ||||||
4801 | |||||||
4802 | if (parseToken(AsmToken::EndOfStatement, | ||||||
4803 | "unexpected token in '" + Twine(IDVal) + "' directive")) | ||||||
4804 | return true; | ||||||
4805 | |||||||
4806 | return false; | ||||||
4807 | } | ||||||
4808 | |||||||
4809 | /// parseDirectiveRealDCB | ||||||
4810 | /// ::= .dcb.{d, s} expression, expression | ||||||
4811 | bool AsmParser::parseDirectiveRealDCB(StringRef IDVal, const fltSemantics &Semantics) { | ||||||
4812 | SMLoc NumValuesLoc = Lexer.getLoc(); | ||||||
4813 | int64_t NumValues; | ||||||
4814 | if (checkForValidSection() || parseAbsoluteExpression(NumValues)) | ||||||
4815 | return true; | ||||||
4816 | |||||||
4817 | if (NumValues < 0) { | ||||||
4818 | Warning(NumValuesLoc, "'" + Twine(IDVal) + "' directive with negative repeat count has no effect"); | ||||||
4819 | return false; | ||||||
4820 | } | ||||||
4821 | |||||||
4822 | if (parseToken(AsmToken::Comma, | ||||||
4823 | "unexpected token in '" + Twine(IDVal) + "' directive")) | ||||||
4824 | return true; | ||||||
4825 | |||||||
4826 | APInt AsInt; | ||||||
4827 | if (parseRealValue(Semantics, AsInt)) | ||||||
4828 | return true; | ||||||
4829 | |||||||
4830 | if (parseToken(AsmToken::EndOfStatement, | ||||||
4831 | "unexpected token in '" + Twine(IDVal) + "' directive")) | ||||||
4832 | return true; | ||||||
4833 | |||||||
4834 | for (uint64_t i = 0, e = NumValues; i != e; ++i) | ||||||
4835 | getStreamer().emitIntValue(AsInt.getLimitedValue(), | ||||||
4836 | AsInt.getBitWidth() / 8); | ||||||
4837 | |||||||
4838 | return false; | ||||||
4839 | } | ||||||
4840 | |||||||
4841 | /// parseDirectiveDS | ||||||
4842 | /// ::= .ds.{b, d, l, p, s, w, x} expression | ||||||
4843 | bool AsmParser::parseDirectiveDS(StringRef IDVal, unsigned Size) { | ||||||
4844 | SMLoc NumValuesLoc = Lexer.getLoc(); | ||||||
4845 | int64_t NumValues; | ||||||
4846 | if (checkForValidSection() || parseAbsoluteExpression(NumValues)) | ||||||
4847 | return true; | ||||||
4848 | |||||||
4849 | if (NumValues < 0) { | ||||||
4850 | Warning(NumValuesLoc, "'" + Twine(IDVal) + "' directive with negative repeat count has no effect"); | ||||||
4851 | return false; | ||||||
4852 | } | ||||||
4853 | |||||||
4854 | if (parseToken(AsmToken::EndOfStatement, | ||||||
4855 | "unexpected token in '" + Twine(IDVal) + "' directive")) | ||||||
4856 | return true; | ||||||
4857 | |||||||
4858 | for (uint64_t i = 0, e = NumValues; i != e; ++i) | ||||||
4859 | getStreamer().emitFill(Size, 0); | ||||||
4860 | |||||||
4861 | return false; | ||||||
4862 | } | ||||||
4863 | |||||||
4864 | /// parseDirectiveLEB128 | ||||||
4865 | /// ::= (.sleb128 | .uleb128) [ expression (, expression)* ] | ||||||
4866 | bool AsmParser::parseDirectiveLEB128(bool Signed) { | ||||||
4867 | if (checkForValidSection()) | ||||||
4868 | return true; | ||||||
4869 | |||||||
4870 | auto parseOp = [&]() -> bool { | ||||||
4871 | const MCExpr *Value; | ||||||
4872 | if (parseExpression(Value)) | ||||||
4873 | return true; | ||||||
4874 | if (Signed) | ||||||
4875 | getStreamer().emitSLEB128Value(Value); | ||||||
4876 | else | ||||||
4877 | getStreamer().emitULEB128Value(Value); | ||||||
4878 | return false; | ||||||
4879 | }; | ||||||
4880 | |||||||
4881 | if (parseMany(parseOp)) | ||||||
4882 | return addErrorSuffix(" in directive"); | ||||||
4883 | |||||||
4884 | return false; | ||||||
4885 | } | ||||||
4886 | |||||||
4887 | /// parseDirectiveSymbolAttribute | ||||||
4888 | /// ::= { ".globl", ".weak", ... } [ identifier ( , identifier )* ] | ||||||
4889 | bool AsmParser::parseDirectiveSymbolAttribute(MCSymbolAttr Attr) { | ||||||
4890 | auto parseOp = [&]() -> bool { | ||||||
4891 | StringRef Name; | ||||||
4892 | SMLoc Loc = getTok().getLoc(); | ||||||
4893 | if (parseIdentifier(Name)) | ||||||
4894 | return Error(Loc, "expected identifier"); | ||||||
4895 | MCSymbol *Sym = getContext().getOrCreateSymbol(Name); | ||||||
4896 | |||||||
4897 | // Assembler local symbols don't make any sense here. Complain loudly. | ||||||
4898 | if (Sym->isTemporary()) | ||||||
4899 | return Error(Loc, "non-local symbol required"); | ||||||
4900 | |||||||
4901 | if (!getStreamer().emitSymbolAttribute(Sym, Attr)) | ||||||
4902 | return Error(Loc, "unable to emit symbol attribute"); | ||||||
4903 | return false; | ||||||
4904 | }; | ||||||
4905 | |||||||
4906 | if (parseMany(parseOp)) | ||||||
4907 | return addErrorSuffix(" in directive"); | ||||||
4908 | return false; | ||||||
4909 | } | ||||||
4910 | |||||||
4911 | /// parseDirectiveComm | ||||||
4912 | /// ::= ( .comm | .lcomm ) identifier , size_expression [ , align_expression ] | ||||||
4913 | bool AsmParser::parseDirectiveComm(bool IsLocal) { | ||||||
4914 | if (checkForValidSection()) | ||||||
4915 | return true; | ||||||
4916 | |||||||
4917 | SMLoc IDLoc = getLexer().getLoc(); | ||||||
4918 | StringRef Name; | ||||||
4919 | if (parseIdentifier(Name)) | ||||||
4920 | return TokError("expected identifier in directive"); | ||||||
4921 | |||||||
4922 | // Handle the identifier as the key symbol. | ||||||
4923 | MCSymbol *Sym = getContext().getOrCreateSymbol(Name); | ||||||
4924 | |||||||
4925 | if (getLexer().isNot(AsmToken::Comma)) | ||||||
4926 | return TokError("unexpected token in directive"); | ||||||
4927 | Lex(); | ||||||
4928 | |||||||
4929 | int64_t Size; | ||||||
4930 | SMLoc SizeLoc = getLexer().getLoc(); | ||||||
4931 | if (parseAbsoluteExpression(Size)) | ||||||
4932 | return true; | ||||||
4933 | |||||||
4934 | int64_t Pow2Alignment = 0; | ||||||
4935 | SMLoc Pow2AlignmentLoc; | ||||||
4936 | if (getLexer().is(AsmToken::Comma)) { | ||||||
4937 | Lex(); | ||||||
4938 | Pow2AlignmentLoc = getLexer().getLoc(); | ||||||
4939 | if (parseAbsoluteExpression(Pow2Alignment)) | ||||||
4940 | return true; | ||||||
4941 | |||||||
4942 | LCOMM::LCOMMType LCOMM = Lexer.getMAI().getLCOMMDirectiveAlignmentType(); | ||||||
4943 | if (IsLocal && LCOMM == LCOMM::NoAlignment) | ||||||
4944 | return Error(Pow2AlignmentLoc, "alignment not supported on this target"); | ||||||
4945 | |||||||
4946 | // If this target takes alignments in bytes (not log) validate and convert. | ||||||
4947 | if ((!IsLocal && Lexer.getMAI().getCOMMDirectiveAlignmentIsInBytes()) || | ||||||
4948 | (IsLocal && LCOMM == LCOMM::ByteAlignment)) { | ||||||
4949 | if (!isPowerOf2_64(Pow2Alignment)) | ||||||
4950 | return Error(Pow2AlignmentLoc, "alignment must be a power of 2"); | ||||||
4951 | Pow2Alignment = Log2_64(Pow2Alignment); | ||||||
4952 | } | ||||||
4953 | } | ||||||
4954 | |||||||
4955 | if (parseToken(AsmToken::EndOfStatement, | ||||||
4956 | "unexpected token in '.comm' or '.lcomm' directive")) | ||||||
4957 | return true; | ||||||
4958 | |||||||
4959 | // NOTE: a size of zero for a .comm should create a undefined symbol | ||||||
4960 | // but a size of .lcomm creates a bss symbol of size zero. | ||||||
4961 | if (Size < 0) | ||||||
4962 | return Error(SizeLoc, "invalid '.comm' or '.lcomm' directive size, can't " | ||||||
4963 | "be less than zero"); | ||||||
4964 | |||||||
4965 | // NOTE: The alignment in the directive is a power of 2 value, the assembler | ||||||
4966 | // may internally end up wanting an alignment in bytes. | ||||||
4967 | // FIXME: Diagnose overflow. | ||||||
4968 | if (Pow2Alignment < 0) | ||||||
4969 | return Error(Pow2AlignmentLoc, "invalid '.comm' or '.lcomm' directive " | ||||||
4970 | "alignment, can't be less than zero"); | ||||||
4971 | |||||||
4972 | Sym->redefineIfPossible(); | ||||||
4973 | if (!Sym->isUndefined()) | ||||||
4974 | return Error(IDLoc, "invalid symbol redefinition"); | ||||||
4975 | |||||||
4976 | // Create the Symbol as a common or local common with Size and Pow2Alignment | ||||||
4977 | if (IsLocal) { | ||||||
4978 | getStreamer().emitLocalCommonSymbol(Sym, Size, 1 << Pow2Alignment); | ||||||
4979 | return false; | ||||||
4980 | } | ||||||
4981 | |||||||
4982 | getStreamer().emitCommonSymbol(Sym, Size, 1 << Pow2Alignment); | ||||||
4983 | return false; | ||||||
4984 | } | ||||||
4985 | |||||||
4986 | /// parseDirectiveAbort | ||||||
4987 | /// ::= .abort [... message ...] | ||||||
4988 | bool AsmParser::parseDirectiveAbort() { | ||||||
4989 | // FIXME: Use loc from directive. | ||||||
4990 | SMLoc Loc = getLexer().getLoc(); | ||||||
4991 | |||||||
4992 | StringRef Str = parseStringToEndOfStatement(); | ||||||
4993 | if (parseToken(AsmToken::EndOfStatement, | ||||||
4994 | "unexpected token in '.abort' directive")) | ||||||
4995 | return true; | ||||||
4996 | |||||||
4997 | if (Str.empty()) | ||||||
4998 | return Error(Loc, ".abort detected. Assembly stopping."); | ||||||
4999 | else | ||||||
5000 | return Error(Loc, ".abort '" + Str + "' detected. Assembly stopping."); | ||||||
5001 | // FIXME: Actually abort assembly here. | ||||||
5002 | |||||||
5003 | return false; | ||||||
5004 | } | ||||||
5005 | |||||||
5006 | /// parseDirectiveInclude | ||||||
5007 | /// ::= .include "filename" | ||||||
5008 | bool AsmParser::parseDirectiveInclude() { | ||||||
5009 | // Allow the strings to have escaped octal character sequence. | ||||||
5010 | std::string Filename; | ||||||
5011 | SMLoc IncludeLoc = getTok().getLoc(); | ||||||
5012 | |||||||
5013 | if (check(getTok().isNot(AsmToken::String), | ||||||
5014 | "expected string in '.include' directive") || | ||||||
5015 | parseEscapedString(Filename) || | ||||||
5016 | check(getTok().isNot(AsmToken::EndOfStatement), | ||||||
5017 | "unexpected token in '.include' directive") || | ||||||
5018 | // Attempt to switch the lexer to the included file before consuming the | ||||||
5019 | // end of statement to avoid losing it when we switch. | ||||||
5020 | check(enterIncludeFile(Filename), IncludeLoc, | ||||||
5021 | "Could not find include file '" + Filename + "'")) | ||||||
5022 | return true; | ||||||
5023 | |||||||
5024 | return false; | ||||||
5025 | } | ||||||
5026 | |||||||
5027 | /// parseDirectiveIncbin | ||||||
5028 | /// ::= .incbin "filename" [ , skip [ , count ] ] | ||||||
5029 | bool AsmParser::parseDirectiveIncbin() { | ||||||
5030 | // Allow the strings to have escaped octal character sequence. | ||||||
5031 | std::string Filename; | ||||||
5032 | SMLoc IncbinLoc = getTok().getLoc(); | ||||||
5033 | if (check(getTok().isNot(AsmToken::String), | ||||||
5034 | "expected string in '.incbin' directive") || | ||||||
5035 | parseEscapedString(Filename)) | ||||||
5036 | return true; | ||||||
5037 | |||||||
5038 | int64_t Skip = 0; | ||||||
5039 | const MCExpr *Count = nullptr; | ||||||
5040 | SMLoc SkipLoc, CountLoc; | ||||||
5041 | if (parseOptionalToken(AsmToken::Comma)) { | ||||||
5042 | // The skip expression can be omitted while specifying the count, e.g: | ||||||
5043 | // .incbin "filename",,4 | ||||||
5044 | if (getTok().isNot(AsmToken::Comma)) { | ||||||
5045 | if (parseTokenLoc(SkipLoc) || parseAbsoluteExpression(Skip)) | ||||||
5046 | return true; | ||||||
5047 | } | ||||||
5048 | if (parseOptionalToken(AsmToken::Comma)) { | ||||||
5049 | CountLoc = getTok().getLoc(); | ||||||
5050 | if (parseExpression(Count)) | ||||||
5051 | return true; | ||||||
5052 | } | ||||||
5053 | } | ||||||
5054 | |||||||
5055 | if (parseToken(AsmToken::EndOfStatement, | ||||||
5056 | "unexpected token in '.incbin' directive")) | ||||||
5057 | return true; | ||||||
5058 | |||||||
5059 | if (check(Skip < 0, SkipLoc, "skip is negative")) | ||||||
5060 | return true; | ||||||
5061 | |||||||
5062 | // Attempt to process the included file. | ||||||
5063 | if (processIncbinFile(Filename, Skip, Count, CountLoc)) | ||||||
5064 | return Error(IncbinLoc, "Could not find incbin file '" + Filename + "'"); | ||||||
5065 | return false; | ||||||
5066 | } | ||||||
5067 | |||||||
5068 | /// parseDirectiveIf | ||||||
5069 | /// ::= .if{,eq,ge,gt,le,lt,ne} expression | ||||||
5070 | bool AsmParser::parseDirectiveIf(SMLoc DirectiveLoc, DirectiveKind DirKind) { | ||||||
5071 | TheCondStack.push_back(TheCondState); | ||||||
5072 | TheCondState.TheCond = AsmCond::IfCond; | ||||||
5073 | if (TheCondState.Ignore) { | ||||||
5074 | eatToEndOfStatement(); | ||||||
5075 | } else { | ||||||
5076 | int64_t ExprValue; | ||||||
5077 | if (parseAbsoluteExpression(ExprValue) || | ||||||
5078 | parseToken(AsmToken::EndOfStatement, | ||||||
5079 | "unexpected token in '.if' directive")) | ||||||
5080 | return true; | ||||||
5081 | |||||||
5082 | switch (DirKind) { | ||||||
5083 | default: | ||||||
5084 | llvm_unreachable("unsupported directive")::llvm::llvm_unreachable_internal("unsupported directive", "/build/llvm-toolchain-snapshot-13~++20210306111116+7ae191f59f0f/llvm/lib/MC/MCParser/AsmParser.cpp" , 5084); | ||||||
5085 | case DK_IF: | ||||||
5086 | case DK_IFNE: | ||||||
5087 | break; | ||||||
5088 | case DK_IFEQ: | ||||||
5089 | ExprValue = ExprValue == 0; | ||||||
5090 | break; | ||||||
5091 | case DK_IFGE: | ||||||
5092 | ExprValue = ExprValue >= 0; | ||||||
5093 | break; | ||||||
5094 | case DK_IFGT: | ||||||
5095 | ExprValue = ExprValue > 0; | ||||||
5096 | break; | ||||||
5097 | case DK_IFLE: | ||||||
5098 | ExprValue = ExprValue <= 0; | ||||||
5099 | break; | ||||||
5100 | case DK_IFLT: | ||||||
5101 | ExprValue = ExprValue < 0; | ||||||
5102 | break; | ||||||
5103 | } | ||||||
5104 | |||||||
5105 | TheCondState.CondMet = ExprValue; | ||||||
5106 | TheCondState.Ignore = !TheCondState.CondMet; | ||||||
5107 | } | ||||||
5108 | |||||||
5109 | return false; | ||||||
5110 | } | ||||||
5111 | |||||||
5112 | /// parseDirectiveIfb | ||||||
5113 | /// ::= .ifb string | ||||||
5114 | bool AsmParser::parseDirectiveIfb(SMLoc DirectiveLoc, bool ExpectBlank) { | ||||||
5115 | TheCondStack.push_back(TheCondState); | ||||||
5116 | TheCondState.TheCond = AsmCond::IfCond; | ||||||
5117 | |||||||
5118 | if (TheCondState.Ignore) { | ||||||
5119 | eatToEndOfStatement(); | ||||||
5120 | } else { | ||||||
5121 | StringRef Str = parseStringToEndOfStatement(); | ||||||
5122 | |||||||
5123 | if (parseToken(AsmToken::EndOfStatement, | ||||||
5124 | "unexpected token in '.ifb' directive")) | ||||||
5125 | return true; | ||||||
5126 | |||||||
5127 | TheCondState.CondMet = ExpectBlank == Str.empty(); | ||||||
5128 | TheCondState.Ignore = !TheCondState.CondMet; | ||||||
5129 | } | ||||||
5130 | |||||||
5131 | return false; | ||||||
5132 | } | ||||||
5133 | |||||||
5134 | /// parseDirectiveIfc | ||||||
5135 | /// ::= .ifc string1, string2 | ||||||
5136 | /// ::= .ifnc string1, string2 | ||||||
5137 | bool AsmParser::parseDirectiveIfc(SMLoc DirectiveLoc, bool ExpectEqual) { | ||||||
5138 | TheCondStack.push_back(TheCondState); | ||||||
5139 | TheCondState.TheCond = AsmCond::IfCond; | ||||||
5140 | |||||||
5141 | if (TheCondState.Ignore) { | ||||||
5142 | eatToEndOfStatement(); | ||||||
5143 | } else { | ||||||
5144 | StringRef Str1 = parseStringToComma(); | ||||||
5145 | |||||||
5146 | if (parseToken(AsmToken::Comma, "unexpected token in '.ifc' directive")) | ||||||
5147 | return true; | ||||||
5148 | |||||||
5149 | StringRef Str2 = parseStringToEndOfStatement(); | ||||||
5150 | |||||||
5151 | if (parseToken(AsmToken::EndOfStatement, | ||||||
5152 | "unexpected token in '.ifc' directive")) | ||||||
5153 | return true; | ||||||
5154 | |||||||
5155 | TheCondState.CondMet = ExpectEqual == (Str1.trim() == Str2.trim()); | ||||||
5156 | TheCondState.Ignore = !TheCondState.CondMet; | ||||||
5157 | } | ||||||
5158 | |||||||
5159 | return false; | ||||||
5160 | } | ||||||
5161 | |||||||
5162 | /// parseDirectiveIfeqs | ||||||
5163 | /// ::= .ifeqs string1, string2 | ||||||
5164 | bool AsmParser::parseDirectiveIfeqs(SMLoc DirectiveLoc, bool ExpectEqual) { | ||||||
5165 | if (Lexer.isNot(AsmToken::String)) { | ||||||
5166 | if (ExpectEqual) | ||||||
5167 | return TokError("expected string parameter for '.ifeqs' directive"); | ||||||
5168 | return TokError("expected string parameter for '.ifnes' directive"); | ||||||
5169 | } | ||||||
5170 | |||||||
5171 | StringRef String1 = getTok().getStringContents(); | ||||||
5172 | Lex(); | ||||||
5173 | |||||||
5174 | if (Lexer.isNot(AsmToken::Comma)) { | ||||||
5175 | if (ExpectEqual) | ||||||
5176 | return TokError( | ||||||
5177 | "expected comma after first string for '.ifeqs' directive"); | ||||||
5178 | return TokError("expected comma after first string for '.ifnes' directive"); | ||||||
5179 | } | ||||||
5180 | |||||||
5181 | Lex(); | ||||||
5182 | |||||||
5183 | if (Lexer.isNot(AsmToken::String)) { | ||||||
5184 | if (ExpectEqual) | ||||||
5185 | return TokError("expected string parameter for '.ifeqs' directive"); | ||||||
5186 | return TokError("expected string parameter for '.ifnes' directive"); | ||||||
5187 | } | ||||||
5188 | |||||||
5189 | StringRef String2 = getTok().getStringContents(); | ||||||
5190 | Lex(); | ||||||
5191 | |||||||
5192 | TheCondStack.push_back(TheCondState); | ||||||
5193 | TheCondState.TheCond = AsmCond::IfCond; | ||||||
5194 | TheCondState.CondMet = ExpectEqual == (String1 == String2); | ||||||
5195 | TheCondState.Ignore = !TheCondState.CondMet; | ||||||
5196 | |||||||
5197 | return false; | ||||||
5198 | } | ||||||
5199 | |||||||
5200 | /// parseDirectiveIfdef | ||||||
5201 | /// ::= .ifdef symbol | ||||||
5202 | bool AsmParser::parseDirectiveIfdef(SMLoc DirectiveLoc, bool expect_defined) { | ||||||
5203 | StringRef Name; | ||||||
5204 | TheCondStack.push_back(TheCondState); | ||||||
5205 | TheCondState.TheCond = AsmCond::IfCond; | ||||||
5206 | |||||||
5207 | if (TheCondState.Ignore) { | ||||||
5208 | eatToEndOfStatement(); | ||||||
5209 | } else { | ||||||
5210 | if (check(parseIdentifier(Name), "expected identifier after '.ifdef'") || | ||||||
5211 | parseToken(AsmToken::EndOfStatement, "unexpected token in '.ifdef'")) | ||||||
5212 | return true; | ||||||
5213 | |||||||
5214 | MCSymbol *Sym = getContext().lookupSymbol(Name); | ||||||
5215 | |||||||
5216 | if (expect_defined) | ||||||
5217 | TheCondState.CondMet = (Sym && !Sym->isUndefined(false)); | ||||||
5218 | else | ||||||
5219 | TheCondState.CondMet = (!Sym || Sym->isUndefined(false)); | ||||||
5220 | TheCondState.Ignore = !TheCondState.CondMet; | ||||||
5221 | } | ||||||
5222 | |||||||
5223 | return false; | ||||||
5224 | } | ||||||
5225 | |||||||
5226 | /// parseDirectiveElseIf | ||||||
5227 | /// ::= .elseif expression | ||||||
5228 | bool AsmParser::parseDirectiveElseIf(SMLoc DirectiveLoc) { | ||||||
5229 | if (TheCondState.TheCond != AsmCond::IfCond && | ||||||
5230 | TheCondState.TheCond != AsmCond::ElseIfCond) | ||||||
5231 | return Error(DirectiveLoc, "Encountered a .elseif that doesn't follow an" | ||||||
5232 | " .if or an .elseif"); | ||||||
5233 | TheCondState.TheCond = AsmCond::ElseIfCond; | ||||||
5234 | |||||||
5235 | bool LastIgnoreState = false; | ||||||
5236 | if (!TheCondStack.empty()) | ||||||
5237 | LastIgnoreState = TheCondStack.back().Ignore; | ||||||
5238 | if (LastIgnoreState || TheCondState.CondMet) { | ||||||
5239 | TheCondState.Ignore = true; | ||||||
5240 | eatToEndOfStatement(); | ||||||
5241 | } else { | ||||||
5242 | int64_t ExprValue; | ||||||
5243 | if (parseAbsoluteExpression(ExprValue)) | ||||||
5244 | return true; | ||||||
5245 | |||||||
5246 | if (parseToken(AsmToken::EndOfStatement, | ||||||
5247 | "unexpected token in '.elseif' directive")) | ||||||
5248 | return true; | ||||||
5249 | |||||||
5250 | TheCondState.CondMet = ExprValue; | ||||||
5251 | TheCondState.Ignore = !TheCondState.CondMet; | ||||||
5252 | } | ||||||
5253 | |||||||
5254 | return false; | ||||||
5255 | } | ||||||
5256 | |||||||
5257 | /// parseDirectiveElse | ||||||
5258 | /// ::= .else | ||||||
5259 | bool AsmParser::parseDirectiveElse(SMLoc DirectiveLoc) { | ||||||
5260 | if (parseToken(AsmToken::EndOfStatement, | ||||||
5261 | "unexpected token in '.else' directive")) | ||||||
5262 | return true; | ||||||
5263 | |||||||
5264 | if (TheCondState.TheCond != AsmCond::IfCond && | ||||||
5265 | TheCondState.TheCond != AsmCond::ElseIfCond) | ||||||
5266 | return Error(DirectiveLoc, "Encountered a .else that doesn't follow " | ||||||
5267 | " an .if or an .elseif"); | ||||||
5268 | TheCondState.TheCond = AsmCond::ElseCond; | ||||||
5269 | bool LastIgnoreState = false; | ||||||
5270 | if (!TheCondStack.empty()) | ||||||
5271 | LastIgnoreState = TheCondStack.back().Ignore; | ||||||
5272 | if (LastIgnoreState || TheCondState.CondMet) | ||||||
5273 | TheCondState.Ignore = true; | ||||||
5274 | else | ||||||
5275 | TheCondState.Ignore = false; | ||||||
5276 | |||||||
5277 | return false; | ||||||
5278 | } | ||||||
5279 | |||||||
5280 | /// parseDirectiveEnd | ||||||
5281 | /// ::= .end | ||||||
5282 | bool AsmParser::parseDirectiveEnd(SMLoc DirectiveLoc) { | ||||||
5283 | if (parseToken(AsmToken::EndOfStatement, | ||||||
5284 | "unexpected token in '.end' directive")) | ||||||
5285 | return true; | ||||||
5286 | |||||||
5287 | while (Lexer.isNot(AsmToken::Eof)) | ||||||
5288 | Lexer.Lex(); | ||||||
5289 | |||||||
5290 | return false; | ||||||
5291 | } | ||||||
5292 | |||||||
5293 | /// parseDirectiveError | ||||||
5294 | /// ::= .err | ||||||
5295 | /// ::= .error [string] | ||||||
5296 | bool AsmParser::parseDirectiveError(SMLoc L, bool WithMessage) { | ||||||
5297 | if (!TheCondStack.empty()) { | ||||||
5298 | if (TheCondStack.back().Ignore) { | ||||||
5299 | eatToEndOfStatement(); | ||||||
5300 | return false; | ||||||
5301 | } | ||||||
5302 | } | ||||||
5303 | |||||||
5304 | if (!WithMessage) | ||||||
5305 | return Error(L, ".err encountered"); | ||||||
5306 | |||||||
5307 | StringRef Message = ".error directive invoked in source file"; | ||||||
5308 | if (Lexer.isNot(AsmToken::EndOfStatement)) { | ||||||
5309 | if (Lexer.isNot(AsmToken::String)) | ||||||
5310 | return TokError(".error argument must be a string"); | ||||||
5311 | |||||||
5312 | Message = getTok().getStringContents(); | ||||||
5313 | Lex(); | ||||||
5314 | } | ||||||
5315 | |||||||
5316 | return Error(L, Message); | ||||||
5317 | } | ||||||
5318 | |||||||
5319 | /// parseDirectiveWarning | ||||||
5320 | /// ::= .warning [string] | ||||||
5321 | bool AsmParser::parseDirectiveWarning(SMLoc L) { | ||||||
5322 | if (!TheCondStack.empty()) { | ||||||
5323 | if (TheCondStack.back().Ignore) { | ||||||
5324 | eatToEndOfStatement(); | ||||||
5325 | return false; | ||||||
5326 | } | ||||||
5327 | } | ||||||
5328 | |||||||
5329 | StringRef Message = ".warning directive invoked in source file"; | ||||||
5330 | |||||||
5331 | if (!parseOptionalToken(AsmToken::EndOfStatement)) { | ||||||
5332 | if (Lexer.isNot(AsmToken::String)) | ||||||
5333 | return TokError(".warning argument must be a string"); | ||||||
5334 | |||||||
5335 | Message = getTok().getStringContents(); | ||||||
5336 | Lex(); | ||||||
5337 | if (parseToken(AsmToken::EndOfStatement, | ||||||
5338 | "expected end of statement in '.warning' directive")) | ||||||
5339 | return true; | ||||||
5340 | } | ||||||
5341 | |||||||
5342 | return Warning(L, Message); | ||||||
5343 | } | ||||||
5344 | |||||||
5345 | /// parseDirectiveEndIf | ||||||
5346 | /// ::= .endif | ||||||
5347 | bool AsmParser::parseDirectiveEndIf(SMLoc DirectiveLoc) { | ||||||
5348 | if (parseToken(AsmToken::EndOfStatement, | ||||||
5349 | "unexpected token in '.endif' directive")) | ||||||
5350 | return true; | ||||||
5351 | |||||||
5352 | if ((TheCondState.TheCond == AsmCond::NoCond) || TheCondStack.empty()) | ||||||
5353 | return Error(DirectiveLoc, "Encountered a .endif that doesn't follow " | ||||||
5354 | "an .if or .else"); | ||||||
5355 | if (!TheCondStack.empty()) { | ||||||
5356 | TheCondState = TheCondStack.back(); | ||||||
5357 | TheCondStack.pop_back(); | ||||||
5358 | } | ||||||
5359 | |||||||
5360 | return false; | ||||||
5361 | } | ||||||
5362 | |||||||
5363 | void AsmParser::initializeDirectiveKindMap() { | ||||||
5364 | /* Lookup will be done with the directive | ||||||
5365 | * converted to lower case, so all these | ||||||
5366 | * keys should be lower case. | ||||||
5367 | * (target specific directives are handled | ||||||
5368 | * elsewhere) | ||||||
5369 | */ | ||||||
5370 | DirectiveKindMap[".set"] = DK_SET; | ||||||
5371 | DirectiveKindMap[".equ"] = DK_EQU; | ||||||
5372 | DirectiveKindMap[".equiv"] = DK_EQUIV; | ||||||
5373 | DirectiveKindMap[".ascii"] = DK_ASCII; | ||||||
5374 | DirectiveKindMap[".asciz"] = DK_ASCIZ; | ||||||
5375 | DirectiveKindMap[".string"] = DK_STRING; | ||||||
5376 | DirectiveKindMap[".byte"] = DK_BYTE; | ||||||
5377 | DirectiveKindMap[".short"] = DK_SHORT; | ||||||
5378 | DirectiveKindMap[".value"] = DK_VALUE; | ||||||
5379 | DirectiveKindMap[".2byte"] = DK_2BYTE; | ||||||
5380 | DirectiveKindMap[".long"] = DK_LONG; | ||||||
5381 | DirectiveKindMap[".int"] = DK_INT; | ||||||
5382 | DirectiveKindMap[".4byte"] = DK_4BYTE; | ||||||
5383 | DirectiveKindMap[".quad"] = DK_QUAD; | ||||||
5384 | DirectiveKindMap[".8byte"] = DK_8BYTE; | ||||||
5385 | DirectiveKindMap[".octa"] = DK_OCTA; | ||||||
5386 | DirectiveKindMap[".single"] = DK_SINGLE; | ||||||
5387 | DirectiveKindMap[".float"] = DK_FLOAT; | ||||||
5388 | DirectiveKindMap[".double"] = DK_DOUBLE; | ||||||
5389 | DirectiveKindMap[".align"] = DK_ALIGN; | ||||||
5390 | DirectiveKindMap[".align32"] = DK_ALIGN32; | ||||||
5391 | DirectiveKindMap[".balign"] = DK_BALIGN; | ||||||
5392 | DirectiveKindMap[".balignw"] = DK_BALIGNW; | ||||||
5393 | DirectiveKindMap[".balignl"] = DK_BALIGNL; | ||||||
5394 | DirectiveKindMap[".p2align"] = DK_P2ALIGN; | ||||||
5395 | DirectiveKindMap[".p2alignw"] = DK_P2ALIGNW; | ||||||
5396 | DirectiveKindMap[".p2alignl"] = DK_P2ALIGNL; | ||||||
5397 | DirectiveKindMap[".org"] = DK_ORG; | ||||||
5398 | DirectiveKindMap[".fill"] = DK_FILL; | ||||||
5399 | DirectiveKindMap[".zero"] = DK_ZERO; | ||||||
5400 | DirectiveKindMap[".extern"] = DK_EXTERN; | ||||||
5401 | DirectiveKindMap[".globl"] = DK_GLOBL; | ||||||
5402 | DirectiveKindMap[".global"] = DK_GLOBAL; | ||||||
5403 | DirectiveKindMap[".lazy_reference"] = DK_LAZY_REFERENCE; | ||||||
5404 | DirectiveKindMap[".no_dead_strip"] = DK_NO_DEAD_STRIP; | ||||||
5405 | DirectiveKindMap[".symbol_resolver"] = DK_SYMBOL_RESOLVER; | ||||||
5406 | DirectiveKindMap[".private_extern"] = DK_PRIVATE_EXTERN; | ||||||
5407 | DirectiveKindMap[".reference"] = DK_REFERENCE; | ||||||
5408 | DirectiveKindMap[".weak_definition"] = DK_WEAK_DEFINITION; | ||||||
5409 | DirectiveKindMap[".weak_reference"] = DK_WEAK_REFERENCE; | ||||||
5410 | DirectiveKindMap[".weak_def_can_be_hidden"] = DK_WEAK_DEF_CAN_BE_HIDDEN; | ||||||
5411 | DirectiveKindMap[".cold"] = DK_COLD; | ||||||
5412 | DirectiveKindMap[".comm"] = DK_COMM; | ||||||
5413 | DirectiveKindMap[".common"] = DK_COMMON; | ||||||
5414 | DirectiveKindMap[".lcomm"] = DK_LCOMM; | ||||||
5415 | DirectiveKindMap[".abort"] = DK_ABORT; | ||||||
5416 | DirectiveKindMap[".include"] = DK_INCLUDE; | ||||||
5417 | DirectiveKindMap[".incbin"] = DK_INCBIN; | ||||||
5418 | DirectiveKindMap[".code16"] = DK_CODE16; | ||||||
5419 | DirectiveKindMap[".code16gcc"] = DK_CODE16GCC; | ||||||
5420 | DirectiveKindMap[".rept"] = DK_REPT; | ||||||
5421 | DirectiveKindMap[".rep"] = DK_REPT; | ||||||
5422 | DirectiveKindMap[".irp"] = DK_IRP; | ||||||
5423 | DirectiveKindMap[".irpc"] = DK_IRPC; | ||||||
5424 | DirectiveKindMap[".endr"] = DK_ENDR; | ||||||
5425 | DirectiveKindMap[".bundle_align_mode"] = DK_BUNDLE_ALIGN_MODE; | ||||||
5426 | DirectiveKindMap[".bundle_lock"] = DK_BUNDLE_LOCK; | ||||||
5427 | DirectiveKindMap[".bundle_unlock"] = DK_BUNDLE_UNLOCK; | ||||||
5428 | DirectiveKindMap[".if"] = DK_IF; | ||||||
5429 | DirectiveKindMap[".ifeq"] = DK_IFEQ; | ||||||
5430 | DirectiveKindMap[".ifge"] = DK_IFGE; | ||||||
5431 | DirectiveKindMap[".ifgt"] = DK_IFGT; | ||||||
5432 | DirectiveKindMap[".ifle"] = DK_IFLE; | ||||||
5433 | DirectiveKindMap[".iflt"] = DK_IFLT; | ||||||
5434 | DirectiveKindMap[".ifne"] = DK_IFNE; | ||||||
5435 | DirectiveKindMap[".ifb"] = DK_IFB; | ||||||
5436 | DirectiveKindMap[".ifnb"] = DK_IFNB; | ||||||
5437 | DirectiveKindMap[".ifc"] = DK_IFC; | ||||||
5438 | DirectiveKindMap[".ifeqs"] = DK_IFEQS; | ||||||
5439 | DirectiveKindMap[".ifnc"] = DK_IFNC; | ||||||
5440 | DirectiveKindMap[".ifnes"] = DK_IFNES; | ||||||
5441 | DirectiveKindMap[".ifdef"] = DK_IFDEF; | ||||||
5442 | DirectiveKindMap[".ifndef"] = DK_IFNDEF; | ||||||
5443 | DirectiveKindMap[".ifnotdef"] = DK_IFNOTDEF; | ||||||
5444 | DirectiveKindMap[".elseif"] = DK_ELSEIF; | ||||||
5445 | DirectiveKindMap[".else"] = DK_ELSE; | ||||||
5446 | DirectiveKindMap[".end"] = DK_END; | ||||||
5447 | DirectiveKindMap[".endif"] = DK_ENDIF; | ||||||
5448 | DirectiveKindMap[".skip"] = DK_SKIP; | ||||||
5449 | DirectiveKindMap[".space"] = DK_SPACE; | ||||||
5450 | DirectiveKindMap[".file"] = DK_FILE; | ||||||
5451 | DirectiveKindMap[".line"] = DK_LINE; | ||||||
5452 | DirectiveKindMap[".loc"] = DK_LOC; | ||||||
5453 | DirectiveKindMap[".stabs"] = DK_STABS; | ||||||
5454 | DirectiveKindMap[".cv_file"] = DK_CV_FILE; | ||||||
5455 | DirectiveKindMap[".cv_func_id"] = DK_CV_FUNC_ID; | ||||||
5456 | DirectiveKindMap[".cv_loc"] = DK_CV_LOC; | ||||||
5457 | DirectiveKindMap[".cv_linetable"] = DK_CV_LINETABLE; | ||||||
5458 | DirectiveKindMap[".cv_inline_linetable"] = DK_CV_INLINE_LINETABLE; | ||||||
5459 | DirectiveKindMap[".cv_inline_site_id"] = DK_CV_INLINE_SITE_ID; | ||||||
5460 | DirectiveKindMap[".cv_def_range"] = DK_CV_DEF_RANGE; | ||||||
5461 | DirectiveKindMap[".cv_string"] = DK_CV_STRING; | ||||||
5462 | DirectiveKindMap[".cv_stringtable"] = DK_CV_STRINGTABLE; | ||||||
5463 | DirectiveKindMap[".cv_filechecksums"] = DK_CV_FILECHECKSUMS; | ||||||
5464 | DirectiveKindMap[".cv_filechecksumoffset"] = DK_CV_FILECHECKSUM_OFFSET; | ||||||
5465 | DirectiveKindMap[".cv_fpo_data"] = DK_CV_FPO_DATA; | ||||||
5466 | DirectiveKindMap[".sleb128"] = DK_SLEB128; | ||||||
5467 | DirectiveKindMap[".uleb128"] = DK_ULEB128; | ||||||
5468 | DirectiveKindMap[".cfi_sections"] = DK_CFI_SECTIONS; | ||||||
5469 | DirectiveKindMap[".cfi_startproc"] = DK_CFI_STARTPROC; | ||||||
5470 | DirectiveKindMap[".cfi_endproc"] = DK_CFI_ENDPROC; | ||||||
5471 | DirectiveKindMap[".cfi_def_cfa"] = DK_CFI_DEF_CFA; | ||||||
5472 | DirectiveKindMap[".cfi_def_cfa_offset"] = DK_CFI_DEF_CFA_OFFSET; | ||||||
5473 | DirectiveKindMap[".cfi_adjust_cfa_offset"] = DK_CFI_ADJUST_CFA_OFFSET; | ||||||
5474 | DirectiveKindMap[".cfi_def_cfa_register"] = DK_CFI_DEF_CFA_REGISTER; | ||||||
5475 | DirectiveKindMap[".cfi_offset"] = DK_CFI_OFFSET; | ||||||
5476 | DirectiveKindMap[".cfi_rel_offset"] = DK_CFI_REL_OFFSET; | ||||||
5477 | DirectiveKindMap[".cfi_personality"] = DK_CFI_PERSONALITY; | ||||||
5478 | DirectiveKindMap[".cfi_lsda"] = DK_CFI_LSDA; | ||||||
5479 | DirectiveKindMap[".cfi_remember_state"] = DK_CFI_REMEMBER_STATE; | ||||||
5480 | DirectiveKindMap[".cfi_restore_state"] = DK_CFI_RESTORE_STATE; | ||||||
5481 | DirectiveKindMap[".cfi_same_value"] = DK_CFI_SAME_VALUE; | ||||||
5482 | DirectiveKindMap[".cfi_restore"] = DK_CFI_RESTORE; | ||||||
5483 | DirectiveKindMap[".cfi_escape"] = DK_CFI_ESCAPE; | ||||||
5484 | DirectiveKindMap[".cfi_return_column"] = DK_CFI_RETURN_COLUMN; | ||||||
5485 | DirectiveKindMap[".cfi_signal_frame"] = DK_CFI_SIGNAL_FRAME; | ||||||
5486 | DirectiveKindMap[".cfi_undefined"] = DK_CFI_UNDEFINED; | ||||||
5487 | DirectiveKindMap[".cfi_register"] = DK_CFI_REGISTER; | ||||||
5488 | DirectiveKindMap[".cfi_window_save"] = DK_CFI_WINDOW_SAVE; | ||||||
5489 | DirectiveKindMap[".cfi_b_key_frame"] = DK_CFI_B_KEY_FRAME; | ||||||
5490 | DirectiveKindMap[".macros_on"] = DK_MACROS_ON; | ||||||
5491 | DirectiveKindMap[".macros_off"] = DK_MACROS_OFF; | ||||||
5492 | DirectiveKindMap[".macro"] = DK_MACRO; | ||||||
5493 | DirectiveKindMap[".exitm"] = DK_EXITM; | ||||||
5494 | DirectiveKindMap[".endm"] = DK_ENDM; | ||||||
5495 | DirectiveKindMap[".endmacro"] = DK_ENDMACRO; | ||||||
5496 | DirectiveKindMap[".purgem"] = DK_PURGEM; | ||||||
5497 | DirectiveKindMap[".err"] = DK_ERR; | ||||||
5498 | DirectiveKindMap[".error"] = DK_ERROR; | ||||||
5499 | DirectiveKindMap[".warning"] = DK_WARNING; | ||||||
5500 | DirectiveKindMap[".altmacro"] = DK_ALTMACRO; | ||||||
5501 | DirectiveKindMap[".noaltmacro"] = DK_NOALTMACRO; | ||||||
5502 | DirectiveKindMap[".reloc"] = DK_RELOC; | ||||||
5503 | DirectiveKindMap[".dc"] = DK_DC; | ||||||
5504 | DirectiveKindMap[".dc.a"] = DK_DC_A; | ||||||
5505 | DirectiveKindMap[".dc.b"] = DK_DC_B; | ||||||
5506 | DirectiveKindMap[".dc.d"] = DK_DC_D; | ||||||
5507 | DirectiveKindMap[".dc.l"] = DK_DC_L; | ||||||
5508 | DirectiveKindMap[".dc.s"] = DK_DC_S; | ||||||
5509 | DirectiveKindMap[".dc.w"] = DK_DC_W; | ||||||
5510 | DirectiveKindMap[".dc.x"] = DK_DC_X; | ||||||
5511 | DirectiveKindMap[".dcb"] = DK_DCB; | ||||||
5512 | DirectiveKindMap[".dcb.b"] = DK_DCB_B; | ||||||
5513 | DirectiveKindMap[".dcb.d"] = DK_DCB_D; | ||||||
5514 | DirectiveKindMap[".dcb.l"] = DK_DCB_L; | ||||||
5515 | DirectiveKindMap[".dcb.s"] = DK_DCB_S; | ||||||
5516 | DirectiveKindMap[".dcb.w"] = DK_DCB_W; | ||||||
5517 | DirectiveKindMap[".dcb.x"] = DK_DCB_X; | ||||||
5518 | DirectiveKindMap[".ds"] = DK_DS; | ||||||
5519 | DirectiveKindMap[".ds.b"] = DK_DS_B; | ||||||
5520 | DirectiveKindMap[".ds.d"] = DK_DS_D; | ||||||
5521 | DirectiveKindMap[".ds.l"] = DK_DS_L; | ||||||
5522 | DirectiveKindMap[".ds.p"] = DK_DS_P; | ||||||
5523 | DirectiveKindMap[".ds.s"] = DK_DS_S; | ||||||
5524 | DirectiveKindMap[".ds.w"] = DK_DS_W; | ||||||
5525 | DirectiveKindMap[".ds.x"] = DK_DS_X; | ||||||
5526 | DirectiveKindMap[".print"] = DK_PRINT; | ||||||
5527 | DirectiveKindMap[".addrsig"] = DK_ADDRSIG; | ||||||
5528 | DirectiveKindMap[".addrsig_sym"] = DK_ADDRSIG_SYM; | ||||||
5529 | DirectiveKindMap[".pseudoprobe"] = DK_PSEUDO_PROBE; | ||||||
5530 | } | ||||||
5531 | |||||||
5532 | MCAsmMacro *AsmParser::parseMacroLikeBody(SMLoc DirectiveLoc) { | ||||||
5533 | AsmToken EndToken, StartToken = getTok(); | ||||||
5534 | |||||||
5535 | unsigned NestLevel = 0; | ||||||
5536 | while (true) { | ||||||
5537 | // Check whether we have reached the end of the file. | ||||||
5538 | if (getLexer().is(AsmToken::Eof)) { | ||||||
5539 | printError(DirectiveLoc, "no matching '.endr' in definition"); | ||||||
5540 | return nullptr; | ||||||
5541 | } | ||||||
5542 | |||||||
5543 | if (Lexer.is(AsmToken::Identifier) && | ||||||
5544 | (getTok().getIdentifier() == ".rep" || | ||||||
5545 | getTok().getIdentifier() == ".rept" || | ||||||
5546 | getTok().getIdentifier() == ".irp" || | ||||||
5547 | getTok().getIdentifier() == ".irpc")) { | ||||||
5548 | ++NestLevel; | ||||||
5549 | } | ||||||
5550 | |||||||
5551 | // Otherwise, check whether we have reached the .endr. | ||||||
5552 | if (Lexer.is(AsmToken::Identifier) && getTok().getIdentifier() == ".endr") { | ||||||
5553 | if (NestLevel == 0) { | ||||||
5554 | EndToken = getTok(); | ||||||
5555 | Lex(); | ||||||
5556 | if (Lexer.isNot(AsmToken::EndOfStatement)) { | ||||||
5557 | printError(getTok().getLoc(), | ||||||
5558 | "unexpected token in '.endr' directive"); | ||||||
5559 | return nullptr; | ||||||
5560 | } | ||||||
5561 | break; | ||||||
5562 | } | ||||||
5563 | --NestLevel; | ||||||
5564 | } | ||||||
5565 | |||||||
5566 | // Otherwise, scan till the end of the statement. | ||||||
5567 | eatToEndOfStatement(); | ||||||
5568 | } | ||||||
5569 | |||||||
5570 | const char *BodyStart = StartToken.getLoc().getPointer(); | ||||||
5571 | const char *BodyEnd = EndToken.getLoc().getPointer(); | ||||||
5572 | StringRef Body = StringRef(BodyStart, BodyEnd - BodyStart); | ||||||
5573 | |||||||
5574 | // We Are Anonymous. | ||||||
5575 | MacroLikeBodies.emplace_back(StringRef(), Body, MCAsmMacroParameters()); | ||||||
5576 | return &MacroLikeBodies.back(); | ||||||
5577 | } | ||||||
5578 | |||||||
5579 | void AsmParser::instantiateMacroLikeBody(MCAsmMacro *M, SMLoc DirectiveLoc, | ||||||
5580 | raw_svector_ostream &OS) { | ||||||
5581 | OS << ".endr\n"; | ||||||
5582 | |||||||
5583 | std::unique_ptr<MemoryBuffer> Instantiation = | ||||||
5584 | MemoryBuffer::getMemBufferCopy(OS.str(), "<instantiation>"); | ||||||
5585 | |||||||
5586 | // Create the macro instantiation object and add to the current macro | ||||||
5587 | // instantiation stack. | ||||||
5588 | MacroInstantiation *MI = new MacroInstantiation{ | ||||||
5589 | DirectiveLoc, CurBuffer, getTok().getLoc(), TheCondStack.size()}; | ||||||
5590 | ActiveMacros.push_back(MI); | ||||||
5591 | |||||||
5592 | // Jump to the macro instantiation and prime the lexer. | ||||||
5593 | CurBuffer = SrcMgr.AddNewSourceBuffer(std::move(Instantiation), SMLoc()); | ||||||
5594 | Lexer.setBuffer(SrcMgr.getMemoryBuffer(CurBuffer)->getBuffer()); | ||||||
5595 | Lex(); | ||||||
5596 | } | ||||||
5597 | |||||||
5598 | /// parseDirectiveRept | ||||||
5599 | /// ::= .rep | .rept count | ||||||
5600 | bool AsmParser::parseDirectiveRept(SMLoc DirectiveLoc, StringRef Dir) { | ||||||
5601 | const MCExpr *CountExpr; | ||||||
5602 | SMLoc CountLoc = getTok().getLoc(); | ||||||
5603 | if (parseExpression(CountExpr)) | ||||||
5604 | return true; | ||||||
5605 | |||||||
5606 | int64_t Count; | ||||||
5607 | if (!CountExpr->evaluateAsAbsolute(Count, getStreamer().getAssemblerPtr())) { | ||||||
5608 | return Error(CountLoc, "unexpected token in '" + Dir + "' directive"); | ||||||
5609 | } | ||||||
5610 | |||||||
5611 | if (check(Count < 0, CountLoc, "Count is negative") || | ||||||
5612 | parseToken(AsmToken::EndOfStatement, | ||||||
5613 | "unexpected token in '" + Dir + "' directive")) | ||||||
5614 | return true; | ||||||
5615 | |||||||
5616 | // Lex the rept definition. | ||||||
5617 | MCAsmMacro *M = parseMacroLikeBody(DirectiveLoc); | ||||||
5618 | if (!M) | ||||||
5619 | return true; | ||||||
5620 | |||||||
5621 | // Macro instantiation is lexical, unfortunately. We construct a new buffer | ||||||
5622 | // to hold the macro body with substitutions. | ||||||
5623 | SmallString<256> Buf; | ||||||
5624 | raw_svector_ostream OS(Buf); | ||||||
5625 | while (Count--) { | ||||||
5626 | // Note that the AtPseudoVariable is disabled for instantiations of .rep(t). | ||||||
5627 | if (expandMacro(OS, M->Body, None, None, false, getTok().getLoc())) | ||||||
5628 | return true; | ||||||
5629 | } | ||||||
5630 | instantiateMacroLikeBody(M, DirectiveLoc, OS); | ||||||
5631 | |||||||
5632 | return false; | ||||||
5633 | } | ||||||
5634 | |||||||
5635 | /// parseDirectiveIrp | ||||||
5636 | /// ::= .irp symbol,values | ||||||
5637 | bool AsmParser::parseDirectiveIrp(SMLoc DirectiveLoc) { | ||||||
5638 | MCAsmMacroParameter Parameter; | ||||||
5639 | MCAsmMacroArguments A; | ||||||
5640 | if (check(parseIdentifier(Parameter.Name), | ||||||
5641 | "expected identifier in '.irp' directive") || | ||||||
5642 | parseToken(AsmToken::Comma, "expected comma in '.irp' directive") || | ||||||
5643 | parseMacroArguments(nullptr, A) || | ||||||
5644 | parseToken(AsmToken::EndOfStatement, "expected End of Statement")) | ||||||
5645 | return true; | ||||||
5646 | |||||||
5647 | // Lex the irp definition. | ||||||
5648 | MCAsmMacro *M = parseMacroLikeBody(DirectiveLoc); | ||||||
5649 | if (!M) | ||||||
5650 | return true; | ||||||
5651 | |||||||
5652 | // Macro instantiation is lexical, unfortunately. We construct a new buffer | ||||||
5653 | // to hold the macro body with substitutions. | ||||||
5654 | SmallString<256> Buf; | ||||||
5655 | raw_svector_ostream OS(Buf); | ||||||
5656 | |||||||
5657 | for (const MCAsmMacroArgument &Arg : A) { | ||||||
5658 | // Note that the AtPseudoVariable is enabled for instantiations of .irp. | ||||||
5659 | // This is undocumented, but GAS seems to support it. | ||||||
5660 | if (expandMacro(OS, M->Body, Parameter, Arg, true, getTok().getLoc())) | ||||||
5661 | return true; | ||||||
5662 | } | ||||||
5663 | |||||||
5664 | instantiateMacroLikeBody(M, DirectiveLoc, OS); | ||||||
5665 | |||||||
5666 | return false; | ||||||
5667 | } | ||||||
5668 | |||||||
5669 | /// parseDirectiveIrpc | ||||||
5670 | /// ::= .irpc symbol,values | ||||||
5671 | bool AsmParser::parseDirectiveIrpc(SMLoc DirectiveLoc) { | ||||||
5672 | MCAsmMacroParameter Parameter; | ||||||
5673 | MCAsmMacroArguments A; | ||||||
5674 | |||||||
5675 | if (check(parseIdentifier(Parameter.Name), | ||||||
5676 | "expected identifier in '.irpc' directive") || | ||||||
5677 | parseToken(AsmToken::Comma, "expected comma in '.irpc' directive") || | ||||||
5678 | parseMacroArguments(nullptr, A)) | ||||||
5679 | return true; | ||||||
5680 | |||||||
5681 | if (A.size() != 1 || A.front().size() != 1) | ||||||
5682 | return TokError("unexpected token in '.irpc' directive"); | ||||||
5683 | |||||||
5684 | // Eat the end of statement. | ||||||
5685 | if (parseToken(AsmToken::EndOfStatement, "expected end of statement")) | ||||||
5686 | return true; | ||||||
5687 | |||||||
5688 | // Lex the irpc definition. | ||||||
5689 | MCAsmMacro *M = parseMacroLikeBody(DirectiveLoc); | ||||||
5690 | if (!M) | ||||||
5691 | return true; | ||||||
5692 | |||||||
5693 | // Macro instantiation is lexical, unfortunately. We construct a new buffer | ||||||
5694 | // to hold the macro body with substitutions. | ||||||
5695 | SmallString<256> Buf; | ||||||
5696 | raw_svector_ostream OS(Buf); | ||||||
5697 | |||||||
5698 | StringRef Values = A.front().front().getString(); | ||||||
5699 | for (std::size_t I = 0, End = Values.size(); I != End; ++I) { | ||||||
5700 | MCAsmMacroArgument Arg; | ||||||
5701 | Arg.emplace_back(AsmToken::Identifier, Values.slice(I, I + 1)); | ||||||
5702 | |||||||
5703 | // Note that the AtPseudoVariable is enabled for instantiations of .irpc. | ||||||
5704 | // This is undocumented, but GAS seems to support it. | ||||||
5705 | if (expandMacro(OS, M->Body, Parameter, Arg, true, getTok().getLoc())) | ||||||
5706 | return true; | ||||||
5707 | } | ||||||
5708 | |||||||
5709 | instantiateMacroLikeBody(M, DirectiveLoc, OS); | ||||||
5710 | |||||||
5711 | return false; | ||||||
5712 | } | ||||||
5713 | |||||||
5714 | bool AsmParser::parseDirectiveEndr(SMLoc DirectiveLoc) { | ||||||
5715 | if (ActiveMacros.empty()) | ||||||
5716 | return TokError("unmatched '.endr' directive"); | ||||||
5717 | |||||||
5718 | // The only .repl that should get here are the ones created by | ||||||
5719 | // instantiateMacroLikeBody. | ||||||
5720 | assert(getLexer().is(AsmToken::EndOfStatement))((getLexer().is(AsmToken::EndOfStatement)) ? static_cast<void > (0) : __assert_fail ("getLexer().is(AsmToken::EndOfStatement)" , "/build/llvm-toolchain-snapshot-13~++20210306111116+7ae191f59f0f/llvm/lib/MC/MCParser/AsmParser.cpp" , 5720, __PRETTY_FUNCTION__)); | ||||||
5721 | |||||||
5722 | handleMacroExit(); | ||||||
5723 | return false; | ||||||
5724 | } | ||||||
5725 | |||||||
5726 | bool AsmParser::parseDirectiveMSEmit(SMLoc IDLoc, ParseStatementInfo &Info, | ||||||
5727 | size_t Len) { | ||||||
5728 | const MCExpr *Value; | ||||||
5729 | SMLoc ExprLoc = getLexer().getLoc(); | ||||||
5730 | if (parseExpression(Value)) | ||||||
5731 | return true; | ||||||
5732 | const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Value); | ||||||
5733 | if (!MCE) | ||||||
5734 | return Error(ExprLoc, "unexpected expression in _emit"); | ||||||
5735 | uint64_t IntValue = MCE->getValue(); | ||||||
5736 | if (!isUInt<8>(IntValue) && !isInt<8>(IntValue)) | ||||||
5737 | return Error(ExprLoc, "literal value out of range for directive"); | ||||||
5738 | |||||||
5739 | Info.AsmRewrites->emplace_back(AOK_Emit, IDLoc, Len); | ||||||
5740 | return false; | ||||||
5741 | } | ||||||
5742 | |||||||
5743 | bool AsmParser::parseDirectiveMSAlign(SMLoc IDLoc, ParseStatementInfo &Info) { | ||||||
5744 | const MCExpr *Value; | ||||||
5745 | SMLoc ExprLoc = getLexer().getLoc(); | ||||||
5746 | if (parseExpression(Value)) | ||||||
5747 | return true; | ||||||
5748 | const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Value); | ||||||
5749 | if (!MCE) | ||||||
5750 | return Error(ExprLoc, "unexpected expression in align"); | ||||||
5751 | uint64_t IntValue = MCE->getValue(); | ||||||
5752 | if (!isPowerOf2_64(IntValue)) | ||||||
5753 | return Error(ExprLoc, "literal value not a power of two greater then zero"); | ||||||
5754 | |||||||
5755 | Info.AsmRewrites->emplace_back(AOK_Align, IDLoc, 5, Log2_64(IntValue)); | ||||||
5756 | return false; | ||||||
5757 | } | ||||||
5758 | |||||||
5759 | bool AsmParser::parseDirectivePrint(SMLoc DirectiveLoc) { | ||||||
5760 | const AsmToken StrTok = getTok(); | ||||||
5761 | Lex(); | ||||||
5762 | if (StrTok.isNot(AsmToken::String) || StrTok.getString().front() != '"') | ||||||
5763 | return Error(DirectiveLoc, "expected double quoted string after .print"); | ||||||
5764 | if (parseToken(AsmToken::EndOfStatement, "expected end of statement")) | ||||||
5765 | return true; | ||||||
5766 | llvm::outs() << StrTok.getStringContents() << '\n'; | ||||||
5767 | return false; | ||||||
5768 | } | ||||||
5769 | |||||||
5770 | bool AsmParser::parseDirectiveAddrsig() { | ||||||
5771 | getStreamer().emitAddrsig(); | ||||||
5772 | return false; | ||||||
5773 | } | ||||||
5774 | |||||||
5775 | bool AsmParser::parseDirectiveAddrsigSym() { | ||||||
5776 | StringRef Name; | ||||||
5777 | if (check(parseIdentifier(Name), | ||||||
5778 | "expected identifier in '.addrsig_sym' directive")) | ||||||
5779 | return true; | ||||||
5780 | MCSymbol *Sym = getContext().getOrCreateSymbol(Name); | ||||||
5781 | getStreamer().emitAddrsigSym(Sym); | ||||||
5782 | return false; | ||||||
5783 | } | ||||||
5784 | |||||||
5785 | bool AsmParser::parseDirectivePseudoProbe() { | ||||||
5786 | int64_t Guid; | ||||||
5787 | int64_t Index; | ||||||
5788 | int64_t Type; | ||||||
5789 | int64_t Attr; | ||||||
5790 | |||||||
5791 | if (getLexer().is(AsmToken::Integer)) { | ||||||
5792 | if (parseIntToken(Guid, "unexpected token in '.pseudoprobe' directive")) | ||||||
5793 | return true; | ||||||
5794 | } | ||||||
5795 | |||||||
5796 | if (getLexer().is(AsmToken::Integer)) { | ||||||
5797 | if (parseIntToken(Index, "unexpected token in '.pseudoprobe' directive")) | ||||||
5798 | return true; | ||||||
5799 | } | ||||||
5800 | |||||||
5801 | if (getLexer().is(AsmToken::Integer)) { | ||||||
5802 | if (parseIntToken(Type, "unexpected token in '.pseudoprobe' directive")) | ||||||
5803 | return true; | ||||||
5804 | } | ||||||
5805 | |||||||
5806 | if (getLexer().is(AsmToken::Integer)) { | ||||||
5807 | if (parseIntToken(Attr, "unexpected token in '.pseudoprobe' directive")) | ||||||
5808 | return true; | ||||||
5809 | } | ||||||
5810 | |||||||
5811 | // Parse inline stack like @ GUID:11:12 @ GUID:1:11 @ GUID:3:21 | ||||||
5812 | MCPseudoProbeInlineStack InlineStack; | ||||||
5813 | |||||||
5814 | while (getLexer().is(AsmToken::At)) { | ||||||
5815 | // eat @ | ||||||
5816 | Lex(); | ||||||
5817 | |||||||
5818 | int64_t CallerGuid = 0; | ||||||
5819 | if (getLexer().is(AsmToken::Integer)) { | ||||||
5820 | if (parseIntToken(CallerGuid, | ||||||
5821 | "unexpected token in '.pseudoprobe' directive")) | ||||||
5822 | return true; | ||||||
5823 | } | ||||||
5824 | |||||||
5825 | // eat colon | ||||||
5826 | if (getLexer().is(AsmToken::Colon)) | ||||||
5827 | Lex(); | ||||||
5828 | |||||||
5829 | int64_t CallerProbeId = 0; | ||||||
5830 | if (getLexer().is(AsmToken::Integer)) { | ||||||
5831 | if (parseIntToken(CallerProbeId, | ||||||
5832 | "unexpected token in '.pseudoprobe' directive")) | ||||||
5833 | return true; | ||||||
5834 | } | ||||||
5835 | |||||||
5836 | InlineSite Site(CallerGuid, CallerProbeId); | ||||||
5837 | InlineStack.push_back(Site); | ||||||
5838 | } | ||||||
5839 | |||||||
5840 | if (parseToken(AsmToken::EndOfStatement, | ||||||
5841 | "unexpected token in '.pseudoprobe' directive")) | ||||||
5842 | return true; | ||||||
5843 | |||||||
5844 | getStreamer().emitPseudoProbe(Guid, Index, Type, Attr, InlineStack); | ||||||
| |||||||
5845 | return false; | ||||||
5846 | } | ||||||
5847 | |||||||
5848 | // We are comparing pointers, but the pointers are relative to a single string. | ||||||
5849 | // Thus, this should always be deterministic. | ||||||
5850 | static int rewritesSort(const AsmRewrite *AsmRewriteA, | ||||||
5851 | const AsmRewrite *AsmRewriteB) { | ||||||
5852 | if (AsmRewriteA->Loc.getPointer() < AsmRewriteB->Loc.getPointer()) | ||||||
5853 | return -1; | ||||||
5854 | if (AsmRewriteB->Loc.getPointer() < AsmRewriteA->Loc.getPointer()) | ||||||
5855 | return 1; | ||||||
5856 | |||||||
5857 | // It's possible to have a SizeDirective, Imm/ImmPrefix and an Input/Output | ||||||
5858 | // rewrite to the same location. Make sure the SizeDirective rewrite is | ||||||
5859 | // performed first, then the Imm/ImmPrefix and finally the Input/Output. This | ||||||
5860 | // ensures the sort algorithm is stable. | ||||||
5861 | if (AsmRewritePrecedence[AsmRewriteA->Kind] > | ||||||
5862 | AsmRewritePrecedence[AsmRewriteB->Kind]) | ||||||
5863 | return -1; | ||||||
5864 | |||||||
5865 | if (AsmRewritePrecedence[AsmRewriteA->Kind] < | ||||||
5866 | AsmRewritePrecedence[AsmRewriteB->Kind]) | ||||||
5867 | return 1; | ||||||
5868 | llvm_unreachable("Unstable rewrite sort.")::llvm::llvm_unreachable_internal("Unstable rewrite sort.", "/build/llvm-toolchain-snapshot-13~++20210306111116+7ae191f59f0f/llvm/lib/MC/MCParser/AsmParser.cpp" , 5868); | ||||||
5869 | } | ||||||
5870 | |||||||
5871 | bool AsmParser::parseMSInlineAsm( | ||||||
5872 | void *AsmLoc, std::string &AsmString, unsigned &NumOutputs, | ||||||
5873 | unsigned &NumInputs, SmallVectorImpl<std::pair<void *, bool>> &OpDecls, | ||||||
5874 | SmallVectorImpl<std::string> &Constraints, | ||||||
5875 | SmallVectorImpl<std::string> &Clobbers, const MCInstrInfo *MII, | ||||||
5876 | const MCInstPrinter *IP, MCAsmParserSemaCallback &SI) { | ||||||
5877 | SmallVector<void *, 4> InputDecls; | ||||||
5878 | SmallVector<void *, 4> OutputDecls; | ||||||
5879 | SmallVector<bool, 4> InputDeclsAddressOf; | ||||||
5880 | SmallVector<bool, 4> OutputDeclsAddressOf; | ||||||
5881 | SmallVector<std::string, 4> InputConstraints; | ||||||
5882 | SmallVector<std::string, 4> OutputConstraints; | ||||||
5883 | SmallVector<unsigned, 4> ClobberRegs; | ||||||
5884 | |||||||
5885 | SmallVector<AsmRewrite, 4> AsmStrRewrites; | ||||||
5886 | |||||||
5887 | // Prime the lexer. | ||||||
5888 | Lex(); | ||||||
5889 | |||||||
5890 | // While we have input, parse each statement. | ||||||
5891 | unsigned InputIdx = 0; | ||||||
5892 | unsigned OutputIdx = 0; | ||||||
5893 | while (getLexer().isNot(AsmToken::Eof)) { | ||||||
5894 | // Parse curly braces marking block start/end | ||||||
5895 | if (parseCurlyBlockScope(AsmStrRewrites)) | ||||||
5896 | continue; | ||||||
5897 | |||||||
5898 | ParseStatementInfo Info(&AsmStrRewrites); | ||||||
5899 | bool StatementErr = parseStatement(Info, &SI); | ||||||
5900 | |||||||
5901 | if (StatementErr || Info.ParseError) { | ||||||
5902 | // Emit pending errors if any exist. | ||||||
5903 | printPendingErrors(); | ||||||
5904 | return true; | ||||||
5905 | } | ||||||
5906 | |||||||
5907 | // No pending error should exist here. | ||||||
5908 | assert(!hasPendingError() && "unexpected error from parseStatement")((!hasPendingError() && "unexpected error from parseStatement" ) ? static_cast<void> (0) : __assert_fail ("!hasPendingError() && \"unexpected error from parseStatement\"" , "/build/llvm-toolchain-snapshot-13~++20210306111116+7ae191f59f0f/llvm/lib/MC/MCParser/AsmParser.cpp" , 5908, __PRETTY_FUNCTION__)); | ||||||
5909 | |||||||
5910 | if (Info.Opcode == ~0U) | ||||||
5911 | continue; | ||||||
5912 | |||||||
5913 | const MCInstrDesc &Desc = MII->get(Info.Opcode); | ||||||
5914 | |||||||
5915 | // Build the list of clobbers, outputs and inputs. | ||||||
5916 | for (unsigned i = 1, e = Info.ParsedOperands.size(); i != e; ++i) { | ||||||
5917 | MCParsedAsmOperand &Operand = *Info.ParsedOperands[i]; | ||||||
5918 | |||||||
5919 | // Register operand. | ||||||
5920 | if (Operand.isReg() && !Operand.needAddressOf() && | ||||||
5921 | !getTargetParser().OmitRegisterFromClobberLists(Operand.getReg())) { | ||||||
5922 | unsigned NumDefs = Desc.getNumDefs(); | ||||||
5923 | // Clobber. | ||||||
5924 | if (NumDefs && Operand.getMCOperandNum() < NumDefs) | ||||||
5925 | ClobberRegs.push_back(Operand.getReg()); | ||||||
5926 | continue; | ||||||
5927 | } | ||||||
5928 | |||||||
5929 | // Expr/Input or Output. | ||||||
5930 | StringRef SymName = Operand.getSymName(); | ||||||
5931 | if (SymName.empty()) | ||||||
5932 | continue; | ||||||
5933 | |||||||
5934 | void *OpDecl = Operand.getOpDecl(); | ||||||
5935 | if (!OpDecl) | ||||||
5936 | continue; | ||||||
5937 | |||||||
5938 | StringRef Constraint = Operand.getConstraint(); | ||||||
5939 | if (Operand.isImm()) { | ||||||
5940 | // Offset as immediate | ||||||
5941 | if (Operand.isOffsetOfLocal()) | ||||||
5942 | Constraint = "r"; | ||||||
5943 | else | ||||||
5944 | Constraint = "i"; | ||||||
5945 | } | ||||||
5946 | |||||||
5947 | bool isOutput = (i == 1) && Desc.mayStore(); | ||||||
5948 | SMLoc Start = SMLoc::getFromPointer(SymName.data()); | ||||||
5949 | if (isOutput) { | ||||||
5950 | ++InputIdx; | ||||||
5951 | OutputDecls.push_back(OpDecl); | ||||||
5952 | OutputDeclsAddressOf.push_back(Operand.needAddressOf()); | ||||||
5953 | OutputConstraints.push_back(("=" + Constraint).str()); | ||||||
5954 | AsmStrRewrites.emplace_back(AOK_Output, Start, SymName.size()); | ||||||
5955 | } else { | ||||||
5956 | InputDecls.push_back(OpDecl); | ||||||
5957 | InputDeclsAddressOf.push_back(Operand.needAddressOf()); | ||||||
5958 | InputConstraints.push_back(Constraint.str()); | ||||||
5959 | if (Desc.OpInfo[i - 1].isBranchTarget()) | ||||||
5960 | AsmStrRewrites.emplace_back(AOK_CallInput, Start, SymName.size()); | ||||||
5961 | else | ||||||
5962 | AsmStrRewrites.emplace_back(AOK_Input, Start, SymName.size()); | ||||||
5963 | } | ||||||
5964 | } | ||||||
5965 | |||||||
5966 | // Consider implicit defs to be clobbers. Think of cpuid and push. | ||||||
5967 | ArrayRef<MCPhysReg> ImpDefs(Desc.getImplicitDefs(), | ||||||
5968 | Desc.getNumImplicitDefs()); | ||||||
5969 | llvm::append_range(ClobberRegs, ImpDefs); | ||||||
5970 | } | ||||||
5971 | |||||||
5972 | // Set the number of Outputs and Inputs. | ||||||
5973 | NumOutputs = OutputDecls.size(); | ||||||
5974 | NumInputs = InputDecls.size(); | ||||||
5975 | |||||||
5976 | // Set the unique clobbers. | ||||||
5977 | array_pod_sort(ClobberRegs.begin(), ClobberRegs.end()); | ||||||
5978 | ClobberRegs.erase(std::unique(ClobberRegs.begin(), ClobberRegs.end()), | ||||||
5979 | ClobberRegs.end()); | ||||||
5980 | Clobbers.assign(ClobberRegs.size(), std::string()); | ||||||
5981 | for (unsigned I = 0, E = ClobberRegs.size(); I != E; ++I) { | ||||||
5982 | raw_string_ostream OS(Clobbers[I]); | ||||||
5983 | IP->printRegName(OS, ClobberRegs[I]); | ||||||
5984 | } | ||||||
5985 | |||||||
5986 | // Merge the various outputs and inputs. Output are expected first. | ||||||
5987 | if (NumOutputs || NumInputs) { | ||||||
5988 | unsigned NumExprs = NumOutputs + NumInputs; | ||||||
5989 | OpDecls.resize(NumExprs); | ||||||
5990 | Constraints.resize(NumExprs); | ||||||
5991 | for (unsigned i = 0; i < NumOutputs; ++i) { | ||||||
5992 | OpDecls[i] = std::make_pair(OutputDecls[i], OutputDeclsAddressOf[i]); | ||||||
5993 | Constraints[i] = OutputConstraints[i]; | ||||||
5994 | } | ||||||
5995 | for (unsigned i = 0, j = NumOutputs; i < NumInputs; ++i, ++j) { | ||||||
5996 | OpDecls[j] = std::make_pair(InputDecls[i], InputDeclsAddressOf[i]); | ||||||
5997 | Constraints[j] = InputConstraints[i]; | ||||||
5998 | } | ||||||
5999 | } | ||||||
6000 | |||||||
6001 | // Build the IR assembly string. | ||||||
6002 | std::string AsmStringIR; | ||||||
6003 | raw_string_ostream OS(AsmStringIR); | ||||||
6004 | StringRef ASMString = | ||||||
6005 | SrcMgr.getMemoryBuffer(SrcMgr.getMainFileID())->getBuffer(); | ||||||
6006 | const char *AsmStart = ASMString.begin(); | ||||||
6007 | const char *AsmEnd = ASMString.end(); | ||||||
6008 | array_pod_sort(AsmStrRewrites.begin(), AsmStrRewrites.end(), rewritesSort); | ||||||
6009 | for (auto it = AsmStrRewrites.begin(); it != AsmStrRewrites.end(); ++it) { | ||||||
6010 | const AsmRewrite &AR = *it; | ||||||
6011 | // Check if this has already been covered by another rewrite... | ||||||
6012 | if (AR.Done) | ||||||
6013 | continue; | ||||||
6014 | AsmRewriteKind Kind = AR.Kind; | ||||||
6015 | |||||||
6016 | const char *Loc = AR.Loc.getPointer(); | ||||||
6017 | assert(Loc >= AsmStart && "Expected Loc to be at or after Start!")((Loc >= AsmStart && "Expected Loc to be at or after Start!" ) ? static_cast<void> (0) : __assert_fail ("Loc >= AsmStart && \"Expected Loc to be at or after Start!\"" , "/build/llvm-toolchain-snapshot-13~++20210306111116+7ae191f59f0f/llvm/lib/MC/MCParser/AsmParser.cpp" , 6017, __PRETTY_FUNCTION__)); | ||||||
6018 | |||||||
6019 | // Emit everything up to the immediate/expression. | ||||||
6020 | if (unsigned Len = Loc - AsmStart) | ||||||
6021 | OS << StringRef(AsmStart, Len); | ||||||
6022 | |||||||
6023 | // Skip the original expression. | ||||||
6024 | if (Kind == AOK_Skip) { | ||||||
6025 | AsmStart = Loc + AR.Len; | ||||||
6026 | continue; | ||||||
6027 | } | ||||||
6028 | |||||||
6029 | unsigned AdditionalSkip = 0; | ||||||
6030 | // Rewrite expressions in $N notation. | ||||||
6031 | switch (Kind) { | ||||||
6032 | default: | ||||||
6033 | break; | ||||||
6034 | case AOK_IntelExpr: | ||||||
6035 | assert(AR.IntelExp.isValid() && "cannot write invalid intel expression")((AR.IntelExp.isValid() && "cannot write invalid intel expression" ) ? static_cast<void> (0) : __assert_fail ("AR.IntelExp.isValid() && \"cannot write invalid intel expression\"" , "/build/llvm-toolchain-snapshot-13~++20210306111116+7ae191f59f0f/llvm/lib/MC/MCParser/AsmParser.cpp" , 6035, __PRETTY_FUNCTION__)); | ||||||
6036 | if (AR.IntelExp.NeedBracs) | ||||||
6037 | OS << "["; | ||||||
6038 | if (AR.IntelExp.hasBaseReg()) | ||||||
6039 | OS << AR.IntelExp.BaseReg; | ||||||
6040 | if (AR.IntelExp.hasIndexReg()) | ||||||
6041 | OS << (AR.IntelExp.hasBaseReg() ? " + " : "") | ||||||
6042 | << AR.IntelExp.IndexReg; | ||||||
6043 | if (AR.IntelExp.Scale > 1) | ||||||
6044 | OS << " * $$" << AR.IntelExp.Scale; | ||||||
6045 | if (AR.IntelExp.hasOffset()) { | ||||||
6046 | if (AR.IntelExp.hasRegs()) | ||||||
6047 | OS << " + "; | ||||||
6048 | // Fuse this rewrite with a rewrite of the offset name, if present. | ||||||
6049 | StringRef OffsetName = AR.IntelExp.OffsetName; | ||||||
6050 | SMLoc OffsetLoc = SMLoc::getFromPointer(AR.IntelExp.OffsetName.data()); | ||||||
6051 | size_t OffsetLen = OffsetName.size(); | ||||||
6052 | auto rewrite_it = std::find_if( | ||||||
6053 | it, AsmStrRewrites.end(), [&](const AsmRewrite &FusingAR) { | ||||||
6054 | return FusingAR.Loc == OffsetLoc && FusingAR.Len == OffsetLen && | ||||||
6055 | (FusingAR.Kind == AOK_Input || | ||||||
6056 | FusingAR.Kind == AOK_CallInput); | ||||||
6057 | }); | ||||||
6058 | if (rewrite_it == AsmStrRewrites.end()) { | ||||||
6059 | OS << "offset " << OffsetName; | ||||||
6060 | } else if (rewrite_it->Kind == AOK_CallInput) { | ||||||
6061 | OS << "${" << InputIdx++ << ":P}"; | ||||||
6062 | rewrite_it->Done = true; | ||||||
6063 | } else { | ||||||
6064 | OS << '$' << InputIdx++; | ||||||
6065 | rewrite_it->Done = true; | ||||||
6066 | } | ||||||
6067 | } | ||||||
6068 | if (AR.IntelExp.Imm || AR.IntelExp.emitImm()) | ||||||
6069 | OS << (AR.IntelExp.emitImm() ? "$$" : " + $$") << AR.IntelExp.Imm; | ||||||
6070 | if (AR.IntelExp.NeedBracs) | ||||||
6071 | OS << "]"; | ||||||
6072 | break; | ||||||
6073 | case AOK_Label: | ||||||
6074 | OS << Ctx.getAsmInfo()->getPrivateLabelPrefix() << AR.Label; | ||||||
6075 | break; | ||||||
6076 | case AOK_Input: | ||||||
6077 | OS << '$' << InputIdx++; | ||||||
6078 | break; | ||||||
6079 | case AOK_CallInput: | ||||||
6080 | OS << "${" << InputIdx++ << ":P}"; | ||||||
6081 | break; | ||||||
6082 | case AOK_Output: | ||||||
6083 | OS << '$' << OutputIdx++; | ||||||
6084 | break; | ||||||
6085 | case AOK_SizeDirective: | ||||||
6086 | switch (AR.Val) { | ||||||
6087 | default: break; | ||||||
6088 | case 8: OS << "byte ptr "; break; | ||||||
6089 | case 16: OS << "word ptr "; break; | ||||||
6090 | case 32: OS << "dword ptr "; break; | ||||||
6091 | case 64: OS << "qword ptr "; break; | ||||||
6092 | case 80: OS << "xword ptr "; break; | ||||||
6093 | case 128: OS << "xmmword ptr "; break; | ||||||
6094 | case 256: OS << "ymmword ptr "; break; | ||||||
6095 | } | ||||||
6096 | break; | ||||||
6097 | case AOK_Emit: | ||||||
6098 | OS << ".byte"; | ||||||
6099 | break; | ||||||
6100 | case AOK_Align: { | ||||||
6101 | // MS alignment directives are measured in bytes. If the native assembler | ||||||
6102 | // measures alignment in bytes, we can pass it straight through. | ||||||
6103 | OS << ".align"; | ||||||
6104 | if (getContext().getAsmInfo()->getAlignmentIsInBytes()) | ||||||
6105 | break; | ||||||
6106 | |||||||
6107 | // Alignment is in log2 form, so print that instead and skip the original | ||||||
6108 | // immediate. | ||||||
6109 | unsigned Val = AR.Val; | ||||||
6110 | OS << ' ' << Val; | ||||||
6111 | assert(Val < 10 && "Expected alignment less then 2^10.")((Val < 10 && "Expected alignment less then 2^10." ) ? static_cast<void> (0) : __assert_fail ("Val < 10 && \"Expected alignment less then 2^10.\"" , "/build/llvm-toolchain-snapshot-13~++20210306111116+7ae191f59f0f/llvm/lib/MC/MCParser/AsmParser.cpp" , 6111, __PRETTY_FUNCTION__)); | ||||||
6112 | AdditionalSkip = (Val < 4) ? 2 : Val < 7 ? 3 : 4; | ||||||
6113 | break; | ||||||
6114 | } | ||||||
6115 | case AOK_EVEN: | ||||||
6116 | OS << ".even"; | ||||||
6117 | break; | ||||||
6118 | case AOK_EndOfStatement: | ||||||
6119 | OS << "\n\t"; | ||||||
6120 | break; | ||||||
6121 | } | ||||||
6122 | |||||||
6123 | // Skip the original expression. | ||||||
6124 | AsmStart = Loc + AR.Len + AdditionalSkip; | ||||||
6125 | } | ||||||
6126 | |||||||
6127 | // Emit the remainder of the asm string. | ||||||
6128 | if (AsmStart != AsmEnd) | ||||||
6129 | OS << StringRef(AsmStart, AsmEnd - AsmStart); | ||||||
6130 | |||||||
6131 | AsmString = OS.str(); | ||||||
6132 | return false; | ||||||
6133 | } | ||||||
6134 | |||||||
6135 | namespace llvm { | ||||||
6136 | namespace MCParserUtils { | ||||||
6137 | |||||||
6138 | /// Returns whether the given symbol is used anywhere in the given expression, | ||||||
6139 | /// or subexpressions. | ||||||
6140 | static bool isSymbolUsedInExpression(const MCSymbol *Sym, const MCExpr *Value) { | ||||||
6141 | switch (Value->getKind()) { | ||||||
6142 | case MCExpr::Binary: { | ||||||
6143 | const MCBinaryExpr *BE = static_cast<const MCBinaryExpr *>(Value); | ||||||
6144 | return isSymbolUsedInExpression(Sym, BE->getLHS()) || | ||||||
6145 | isSymbolUsedInExpression(Sym, BE->getRHS()); | ||||||
6146 | } | ||||||
6147 | case MCExpr::Target: | ||||||
6148 | case MCExpr::Constant: | ||||||
6149 | return false; | ||||||
6150 | case MCExpr::SymbolRef: { | ||||||
6151 | const MCSymbol &S = | ||||||
6152 | static_cast<const MCSymbolRefExpr *>(Value)->getSymbol(); | ||||||
6153 | if (S.isVariable()) | ||||||
6154 | return isSymbolUsedInExpression(Sym, S.getVariableValue()); | ||||||
6155 | return &S == Sym; | ||||||
6156 | } | ||||||
6157 | case MCExpr::Unary: | ||||||
6158 | return isSymbolUsedInExpression( | ||||||
6159 | Sym, static_cast<const MCUnaryExpr *>(Value)->getSubExpr()); | ||||||
6160 | } | ||||||
6161 | |||||||
6162 | llvm_unreachable("Unknown expr kind!")::llvm::llvm_unreachable_internal("Unknown expr kind!", "/build/llvm-toolchain-snapshot-13~++20210306111116+7ae191f59f0f/llvm/lib/MC/MCParser/AsmParser.cpp" , 6162); | ||||||
6163 | } | ||||||
6164 | |||||||
6165 | bool parseAssignmentExpression(StringRef Name, bool allow_redef, | ||||||
6166 | MCAsmParser &Parser, MCSymbol *&Sym, | ||||||
6167 | const MCExpr *&Value) { | ||||||
6168 | |||||||
6169 | // FIXME: Use better location, we should use proper tokens. | ||||||
6170 | SMLoc EqualLoc = Parser.getTok().getLoc(); | ||||||
6171 | if (Parser.parseExpression(Value)) | ||||||
6172 | return Parser.TokError("missing expression"); | ||||||
6173 | |||||||
6174 | // Note: we don't count b as used in "a = b". This is to allow | ||||||
6175 | // a = b | ||||||
6176 | // b = c | ||||||
6177 | |||||||
6178 | if (Parser.parseToken(AsmToken::EndOfStatement)) | ||||||
6179 | return true; | ||||||
6180 | |||||||
6181 | // Validate that the LHS is allowed to be a variable (either it has not been | ||||||
6182 | // used as a symbol, or it is an absolute symbol). | ||||||
6183 | Sym = Parser.getContext().lookupSymbol(Name); | ||||||
6184 | if (Sym) { | ||||||
6185 | // Diagnose assignment to a label. | ||||||
6186 | // | ||||||
6187 | // FIXME: Diagnostics. Note the location of the definition as a label. | ||||||
6188 | // FIXME: Diagnose assignment to protected identifier (e.g., register name). | ||||||
6189 | if (isSymbolUsedInExpression(Sym, Value)) | ||||||
6190 | return Parser.Error(EqualLoc, "Recursive use of '" + Name + "'"); | ||||||
6191 | else if (Sym->isUndefined(/*SetUsed*/ false) && !Sym->isUsed() && | ||||||
6192 | !Sym->isVariable()) | ||||||
6193 | ; // Allow redefinitions of undefined symbols only used in directives. | ||||||
6194 | else if (Sym->isVariable() && !Sym->isUsed() && allow_redef) | ||||||
6195 | ; // Allow redefinitions of variables that haven't yet been used. | ||||||
6196 | else if (!Sym->isUndefined() && (!Sym->isVariable() || !allow_redef)) | ||||||
6197 | return Parser.Error(EqualLoc, "redefinition of '" + Name + "'"); | ||||||
6198 | else if (!Sym->isVariable()) | ||||||
6199 | return Parser.Error(EqualLoc, "invalid assignment to '" + Name + "'"); | ||||||
6200 | else if (!isa<MCConstantExpr>(Sym->getVariableValue())) | ||||||
6201 | return Parser.Error(EqualLoc, | ||||||
6202 | "invalid reassignment of non-absolute variable '" + | ||||||
6203 | Name + "'"); | ||||||
6204 | } else if (Name == ".") { | ||||||
6205 | Parser.getStreamer().emitValueToOffset(Value, 0, EqualLoc); | ||||||
6206 | return false; | ||||||
6207 | } else | ||||||
6208 | Sym = Parser.getContext().getOrCreateSymbol(Name); | ||||||
6209 | |||||||
6210 | Sym->setRedefinable(allow_redef); | ||||||
6211 | |||||||
6212 | return false; | ||||||
6213 | } | ||||||
6214 | |||||||
6215 | } // end namespace MCParserUtils | ||||||
6216 | } // end namespace llvm | ||||||
6217 | |||||||
6218 | /// Create an MCAsmParser instance. | ||||||
6219 | MCAsmParser *llvm::createMCAsmParser(SourceMgr &SM, MCContext &C, | ||||||
6220 | MCStreamer &Out, const MCAsmInfo &MAI, | ||||||
6221 | unsigned CB) { | ||||||
6222 | return new AsmParser(SM, C, Out, MAI, CB); | ||||||
6223 | } |
1 | //===- llvm/MC/MCAsmLexer.h - Abstract Asm Lexer Interface ------*- C++ -*-===// |
2 | // |
3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
4 | // See https://llvm.org/LICENSE.txt for license information. |
5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
6 | // |
7 | //===----------------------------------------------------------------------===// |
8 | |
9 | #ifndef LLVM_MC_MCPARSER_MCASMLEXER_H |
10 | #define LLVM_MC_MCPARSER_MCASMLEXER_H |
11 | |
12 | #include "llvm/ADT/ArrayRef.h" |
13 | #include "llvm/ADT/SmallVector.h" |
14 | #include "llvm/MC/MCAsmMacro.h" |
15 | #include <algorithm> |
16 | #include <cassert> |
17 | #include <cstddef> |
18 | #include <cstdint> |
19 | #include <string> |
20 | |
21 | namespace llvm { |
22 | |
23 | /// A callback class which is notified of each comment in an assembly file as |
24 | /// it is lexed. |
25 | class AsmCommentConsumer { |
26 | public: |
27 | virtual ~AsmCommentConsumer() = default; |
28 | |
29 | /// Callback function for when a comment is lexed. Loc is the start of the |
30 | /// comment text (excluding the comment-start marker). CommentText is the text |
31 | /// of the comment, excluding the comment start and end markers, and the |
32 | /// newline for single-line comments. |
33 | virtual void HandleComment(SMLoc Loc, StringRef CommentText) = 0; |
34 | }; |
35 | |
36 | |
37 | /// Generic assembler lexer interface, for use by target specific assembly |
38 | /// lexers. |
39 | class MCAsmLexer { |
40 | /// The current token, stored in the base class for faster access. |
41 | SmallVector<AsmToken, 1> CurTok; |
42 | |
43 | /// The location and description of the current error |
44 | SMLoc ErrLoc; |
45 | std::string Err; |
46 | |
47 | protected: // Can only create subclasses. |
48 | const char *TokStart = nullptr; |
49 | bool SkipSpace = true; |
50 | bool AllowAtInIdentifier; |
51 | bool IsAtStartOfStatement = true; |
52 | bool LexMasmHexFloats = false; |
53 | bool LexMasmIntegers = false; |
54 | bool LexMasmStrings = false; |
55 | bool UseMasmDefaultRadix = false; |
56 | unsigned DefaultRadix = 10; |
57 | AsmCommentConsumer *CommentConsumer = nullptr; |
58 | |
59 | MCAsmLexer(); |
60 | |
61 | virtual AsmToken LexToken() = 0; |
62 | |
63 | void SetError(SMLoc errLoc, const std::string &err) { |
64 | ErrLoc = errLoc; |
65 | Err = err; |
66 | } |
67 | |
68 | public: |
69 | MCAsmLexer(const MCAsmLexer &) = delete; |
70 | MCAsmLexer &operator=(const MCAsmLexer &) = delete; |
71 | virtual ~MCAsmLexer(); |
72 | |
73 | /// Consume the next token from the input stream and return it. |
74 | /// |
75 | /// The lexer will continuously return the end-of-file token once the end of |
76 | /// the main input file has been reached. |
77 | const AsmToken &Lex() { |
78 | assert(!CurTok.empty())((!CurTok.empty()) ? static_cast<void> (0) : __assert_fail ("!CurTok.empty()", "/build/llvm-toolchain-snapshot-13~++20210306111116+7ae191f59f0f/llvm/include/llvm/MC/MCParser/MCAsmLexer.h" , 78, __PRETTY_FUNCTION__)); |
79 | // Mark if we parsing out a EndOfStatement. |
80 | IsAtStartOfStatement = CurTok.front().getKind() == AsmToken::EndOfStatement; |
81 | CurTok.erase(CurTok.begin()); |
82 | // LexToken may generate multiple tokens via UnLex but will always return |
83 | // the first one. Place returned value at head of CurTok vector. |
84 | if (CurTok.empty()) { |
85 | AsmToken T = LexToken(); |
86 | CurTok.insert(CurTok.begin(), T); |
87 | } |
88 | return CurTok.front(); |
89 | } |
90 | |
91 | void UnLex(AsmToken const &Token) { |
92 | IsAtStartOfStatement = false; |
93 | CurTok.insert(CurTok.begin(), Token); |
94 | } |
95 | |
96 | bool isAtStartOfStatement() { return IsAtStartOfStatement; } |
97 | |
98 | virtual StringRef LexUntilEndOfStatement() = 0; |
99 | |
100 | /// Get the current source location. |
101 | SMLoc getLoc() const; |
102 | |
103 | /// Get the current (last) lexed token. |
104 | const AsmToken &getTok() const { |
105 | return CurTok[0]; |
106 | } |
107 | |
108 | /// Look ahead at the next token to be lexed. |
109 | const AsmToken peekTok(bool ShouldSkipSpace = true) { |
110 | AsmToken Tok; |
111 | |
112 | MutableArrayRef<AsmToken> Buf(Tok); |
113 | size_t ReadCount = peekTokens(Buf, ShouldSkipSpace); |
114 | |
115 | assert(ReadCount == 1)((ReadCount == 1) ? static_cast<void> (0) : __assert_fail ("ReadCount == 1", "/build/llvm-toolchain-snapshot-13~++20210306111116+7ae191f59f0f/llvm/include/llvm/MC/MCParser/MCAsmLexer.h" , 115, __PRETTY_FUNCTION__)); |
116 | (void)ReadCount; |
117 | |
118 | return Tok; |
119 | } |
120 | |
121 | /// Look ahead an arbitrary number of tokens. |
122 | virtual size_t peekTokens(MutableArrayRef<AsmToken> Buf, |
123 | bool ShouldSkipSpace = true) = 0; |
124 | |
125 | /// Get the current error location |
126 | SMLoc getErrLoc() { |
127 | return ErrLoc; |
128 | } |
129 | |
130 | /// Get the current error string |
131 | const std::string &getErr() { |
132 | return Err; |
133 | } |
134 | |
135 | /// Get the kind of current token. |
136 | AsmToken::TokenKind getKind() const { return getTok().getKind(); } |
137 | |
138 | /// Check if the current token has kind \p K. |
139 | bool is(AsmToken::TokenKind K) const { return getTok().is(K); } |
140 | |
141 | /// Check if the current token has kind \p K. |
142 | bool isNot(AsmToken::TokenKind K) const { return getTok().isNot(K); } |
143 | |
144 | /// Set whether spaces should be ignored by the lexer |
145 | void setSkipSpace(bool val) { SkipSpace = val; } |
146 | |
147 | bool getAllowAtInIdentifier() { return AllowAtInIdentifier; } |
148 | void setAllowAtInIdentifier(bool v) { AllowAtInIdentifier = v; } |
149 | |
150 | void setCommentConsumer(AsmCommentConsumer *CommentConsumer) { |
151 | this->CommentConsumer = CommentConsumer; |
152 | } |
153 | |
154 | /// Set whether to lex masm-style binary (e.g., 0b1101) and radix-specified |
155 | /// literals (e.g., 0ABCh [hex], 576t [decimal], 77o [octal], 1101y [binary]). |
156 | void setLexMasmIntegers(bool V) { LexMasmIntegers = V; } |
157 | |
158 | /// Set whether to use masm-style default-radix integer literals. If disabled, |
159 | /// assume decimal unless prefixed (e.g., 0x2c [hex], 077 [octal]). |
160 | void useMasmDefaultRadix(bool V) { UseMasmDefaultRadix = V; } |
161 | |
162 | unsigned getMasmDefaultRadix() const { return DefaultRadix; } |
163 | void setMasmDefaultRadix(unsigned Radix) { DefaultRadix = Radix; } |
164 | |
165 | /// Set whether to lex masm-style hex float literals, such as 3f800000r. |
166 | void setLexMasmHexFloats(bool V) { LexMasmHexFloats = V; } |
167 | |
168 | /// Set whether to lex masm-style string literals, such as 'Can''t find file' |
169 | /// and "This ""value"" not found". |
170 | void setLexMasmStrings(bool V) { LexMasmStrings = V; } |
171 | }; |
172 | |
173 | } // end namespace llvm |
174 | |
175 | #endif // LLVM_MC_MCPARSER_MCASMLEXER_H |
1 | //===- MCAsmMacro.h - Assembly Macros ---------------------------*- C++ -*-===// |
2 | // |
3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
4 | // See https://llvm.org/LICENSE.txt for license information. |
5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
6 | // |
7 | //===----------------------------------------------------------------------===// |
8 | |
9 | #ifndef LLVM_MC_MCASMMACRO_H |
10 | #define LLVM_MC_MCASMMACRO_H |
11 | |
12 | #include "llvm/ADT/APInt.h" |
13 | #include "llvm/ADT/StringRef.h" |
14 | #include "llvm/Support/Debug.h" |
15 | #include "llvm/Support/SMLoc.h" |
16 | #include <vector> |
17 | |
18 | namespace llvm { |
19 | |
20 | /// Target independent representation for an assembler token. |
21 | class AsmToken { |
22 | public: |
23 | enum TokenKind { |
24 | // Markers |
25 | Eof, Error, |
26 | |
27 | // String values. |
28 | Identifier, |
29 | String, |
30 | |
31 | // Integer values. |
32 | Integer, |
33 | BigNum, // larger than 64 bits |
34 | |
35 | // Real values. |
36 | Real, |
37 | |
38 | // Comments |
39 | Comment, |
40 | HashDirective, |
41 | // No-value. |
42 | EndOfStatement, |
43 | Colon, |
44 | Space, |
45 | Plus, Minus, Tilde, |
46 | Slash, // '/' |
47 | BackSlash, // '\' |
48 | LParen, RParen, LBrac, RBrac, LCurly, RCurly, |
49 | Star, Dot, Comma, Dollar, Equal, EqualEqual, |
50 | |
51 | Pipe, PipePipe, Caret, |
52 | Amp, AmpAmp, Exclaim, ExclaimEqual, Percent, Hash, |
53 | Less, LessEqual, LessLess, LessGreater, |
54 | Greater, GreaterEqual, GreaterGreater, At, MinusGreater, |
55 | |
56 | // MIPS unary expression operators such as %neg. |
57 | PercentCall16, PercentCall_Hi, PercentCall_Lo, PercentDtprel_Hi, |
58 | PercentDtprel_Lo, PercentGot, PercentGot_Disp, PercentGot_Hi, PercentGot_Lo, |
59 | PercentGot_Ofst, PercentGot_Page, PercentGottprel, PercentGp_Rel, PercentHi, |
60 | PercentHigher, PercentHighest, PercentLo, PercentNeg, PercentPcrel_Hi, |
61 | PercentPcrel_Lo, PercentTlsgd, PercentTlsldm, PercentTprel_Hi, |
62 | PercentTprel_Lo |
63 | }; |
64 | |
65 | private: |
66 | TokenKind Kind; |
67 | |
68 | /// A reference to the entire token contents; this is always a pointer into |
69 | /// a memory buffer owned by the source manager. |
70 | StringRef Str; |
71 | |
72 | APInt IntVal; |
73 | |
74 | public: |
75 | AsmToken() = default; |
76 | AsmToken(TokenKind Kind, StringRef Str, APInt IntVal) |
77 | : Kind(Kind), Str(Str), IntVal(std::move(IntVal)) {} |
78 | AsmToken(TokenKind Kind, StringRef Str, int64_t IntVal = 0) |
79 | : Kind(Kind), Str(Str), IntVal(64, IntVal, true) {} |
80 | |
81 | TokenKind getKind() const { return Kind; } |
82 | bool is(TokenKind K) const { return Kind == K; } |
83 | bool isNot(TokenKind K) const { return Kind != K; } |
84 | |
85 | SMLoc getLoc() const; |
86 | SMLoc getEndLoc() const; |
87 | SMRange getLocRange() const; |
88 | |
89 | /// Get the contents of a string token (without quotes). |
90 | StringRef getStringContents() const { |
91 | assert(Kind == String && "This token isn't a string!")((Kind == String && "This token isn't a string!") ? static_cast <void> (0) : __assert_fail ("Kind == String && \"This token isn't a string!\"" , "/build/llvm-toolchain-snapshot-13~++20210306111116+7ae191f59f0f/llvm/include/llvm/MC/MCAsmMacro.h" , 91, __PRETTY_FUNCTION__)); |
92 | return Str.slice(1, Str.size() - 1); |
93 | } |
94 | |
95 | /// Get the identifier string for the current token, which should be an |
96 | /// identifier or a string. This gets the portion of the string which should |
97 | /// be used as the identifier, e.g., it does not include the quotes on |
98 | /// strings. |
99 | StringRef getIdentifier() const { |
100 | if (Kind == Identifier) |
101 | return getString(); |
102 | return getStringContents(); |
103 | } |
104 | |
105 | /// Get the string for the current token, this includes all characters (for |
106 | /// example, the quotes on strings) in the token. |
107 | /// |
108 | /// The returned StringRef points into the source manager's memory buffer, and |
109 | /// is safe to store across calls to Lex(). |
110 | StringRef getString() const { return Str; } |
111 | |
112 | // FIXME: Don't compute this in advance, it makes every token larger, and is |
113 | // also not generally what we want (it is nicer for recovery etc. to lex 123br |
114 | // as a single token, then diagnose as an invalid number). |
115 | int64_t getIntVal() const { |
116 | assert(Kind == Integer && "This token isn't an integer!")((Kind == Integer && "This token isn't an integer!") ? static_cast<void> (0) : __assert_fail ("Kind == Integer && \"This token isn't an integer!\"" , "/build/llvm-toolchain-snapshot-13~++20210306111116+7ae191f59f0f/llvm/include/llvm/MC/MCAsmMacro.h" , 116, __PRETTY_FUNCTION__)); |
117 | return IntVal.getZExtValue(); |
118 | } |
119 | |
120 | APInt getAPIntVal() const { |
121 | assert((Kind == Integer || Kind == BigNum) &&(((Kind == Integer || Kind == BigNum) && "This token isn't an integer!" ) ? static_cast<void> (0) : __assert_fail ("(Kind == Integer || Kind == BigNum) && \"This token isn't an integer!\"" , "/build/llvm-toolchain-snapshot-13~++20210306111116+7ae191f59f0f/llvm/include/llvm/MC/MCAsmMacro.h" , 122, __PRETTY_FUNCTION__)) |
122 | "This token isn't an integer!")(((Kind == Integer || Kind == BigNum) && "This token isn't an integer!" ) ? static_cast<void> (0) : __assert_fail ("(Kind == Integer || Kind == BigNum) && \"This token isn't an integer!\"" , "/build/llvm-toolchain-snapshot-13~++20210306111116+7ae191f59f0f/llvm/include/llvm/MC/MCAsmMacro.h" , 122, __PRETTY_FUNCTION__)); |
123 | return IntVal; |
124 | } |
125 | |
126 | void dump(raw_ostream &OS) const; |
127 | }; |
128 | |
129 | struct MCAsmMacroParameter { |
130 | StringRef Name; |
131 | std::vector<AsmToken> Value; |
132 | bool Required = false; |
133 | bool Vararg = false; |
134 | |
135 | #if !defined(NDEBUG) || defined(LLVM_ENABLE_DUMP) |
136 | void dump() const { dump(dbgs()); } |
137 | LLVM_DUMP_METHOD__attribute__((noinline)) __attribute__((__used__)) void dump(raw_ostream &OS) const; |
138 | #endif |
139 | }; |
140 | |
141 | typedef std::vector<MCAsmMacroParameter> MCAsmMacroParameters; |
142 | struct MCAsmMacro { |
143 | StringRef Name; |
144 | StringRef Body; |
145 | MCAsmMacroParameters Parameters; |
146 | std::vector<std::string> Locals; |
147 | bool IsFunction = false; |
148 | |
149 | public: |
150 | MCAsmMacro(StringRef N, StringRef B, MCAsmMacroParameters P) |
151 | : Name(N), Body(B), Parameters(std::move(P)) {} |
152 | MCAsmMacro(StringRef N, StringRef B, MCAsmMacroParameters P, |
153 | std::vector<std::string> L, bool F) |
154 | : Name(N), Body(B), Parameters(std::move(P)), Locals(std::move(L)), |
155 | IsFunction(F) {} |
156 | |
157 | #if !defined(NDEBUG) || defined(LLVM_ENABLE_DUMP) |
158 | void dump() const { dump(dbgs()); } |
159 | LLVM_DUMP_METHOD__attribute__((noinline)) __attribute__((__used__)) void dump(raw_ostream &OS) const; |
160 | #endif |
161 | }; |
162 | } // namespace llvm |
163 | |
164 | #endif |