File: | llvm/lib/MC/MCParser/AsmParser.cpp |
Warning: | line 5832, 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/SmallSet.h" | ||||||
19 | #include "llvm/ADT/SmallString.h" | ||||||
20 | #include "llvm/ADT/SmallVector.h" | ||||||
21 | #include "llvm/ADT/StringExtras.h" | ||||||
22 | #include "llvm/ADT/StringMap.h" | ||||||
23 | #include "llvm/ADT/StringRef.h" | ||||||
24 | #include "llvm/ADT/Twine.h" | ||||||
25 | #include "llvm/BinaryFormat/Dwarf.h" | ||||||
26 | #include "llvm/DebugInfo/CodeView/SymbolRecord.h" | ||||||
27 | #include "llvm/MC/MCAsmInfo.h" | ||||||
28 | #include "llvm/MC/MCCodeView.h" | ||||||
29 | #include "llvm/MC/MCContext.h" | ||||||
30 | #include "llvm/MC/MCDirectives.h" | ||||||
31 | #include "llvm/MC/MCDwarf.h" | ||||||
32 | #include "llvm/MC/MCExpr.h" | ||||||
33 | #include "llvm/MC/MCInstPrinter.h" | ||||||
34 | #include "llvm/MC/MCInstrDesc.h" | ||||||
35 | #include "llvm/MC/MCInstrInfo.h" | ||||||
36 | #include "llvm/MC/MCObjectFileInfo.h" | ||||||
37 | #include "llvm/MC/MCParser/AsmCond.h" | ||||||
38 | #include "llvm/MC/MCParser/AsmLexer.h" | ||||||
39 | #include "llvm/MC/MCParser/MCAsmLexer.h" | ||||||
40 | #include "llvm/MC/MCParser/MCAsmParser.h" | ||||||
41 | #include "llvm/MC/MCParser/MCAsmParserExtension.h" | ||||||
42 | #include "llvm/MC/MCParser/MCAsmParserUtils.h" | ||||||
43 | #include "llvm/MC/MCParser/MCParsedAsmOperand.h" | ||||||
44 | #include "llvm/MC/MCParser/MCTargetAsmParser.h" | ||||||
45 | #include "llvm/MC/MCRegisterInfo.h" | ||||||
46 | #include "llvm/MC/MCSection.h" | ||||||
47 | #include "llvm/MC/MCStreamer.h" | ||||||
48 | #include "llvm/MC/MCSymbol.h" | ||||||
49 | #include "llvm/MC/MCTargetOptions.h" | ||||||
50 | #include "llvm/MC/MCValue.h" | ||||||
51 | #include "llvm/Support/Casting.h" | ||||||
52 | #include "llvm/Support/CommandLine.h" | ||||||
53 | #include "llvm/Support/ErrorHandling.h" | ||||||
54 | #include "llvm/Support/MD5.h" | ||||||
55 | #include "llvm/Support/MathExtras.h" | ||||||
56 | #include "llvm/Support/MemoryBuffer.h" | ||||||
57 | #include "llvm/Support/SMLoc.h" | ||||||
58 | #include "llvm/Support/SourceMgr.h" | ||||||
59 | #include "llvm/Support/raw_ostream.h" | ||||||
60 | #include <algorithm> | ||||||
61 | #include <cassert> | ||||||
62 | #include <cctype> | ||||||
63 | #include <climits> | ||||||
64 | #include <cstddef> | ||||||
65 | #include <cstdint> | ||||||
66 | #include <deque> | ||||||
67 | #include <memory> | ||||||
68 | #include <sstream> | ||||||
69 | #include <string> | ||||||
70 | #include <tuple> | ||||||
71 | #include <utility> | ||||||
72 | #include <vector> | ||||||
73 | |||||||
74 | using namespace llvm; | ||||||
75 | |||||||
76 | MCAsmParserSemaCallback::~MCAsmParserSemaCallback() = default; | ||||||
77 | |||||||
78 | extern cl::opt<unsigned> AsmMacroMaxNestingDepth; | ||||||
79 | |||||||
80 | namespace { | ||||||
81 | |||||||
82 | /// Helper types for tracking macro definitions. | ||||||
83 | typedef std::vector<AsmToken> MCAsmMacroArgument; | ||||||
84 | typedef std::vector<MCAsmMacroArgument> MCAsmMacroArguments; | ||||||
85 | |||||||
86 | /// Helper class for storing information about an active macro | ||||||
87 | /// instantiation. | ||||||
88 | struct MacroInstantiation { | ||||||
89 | /// The location of the instantiation. | ||||||
90 | SMLoc InstantiationLoc; | ||||||
91 | |||||||
92 | /// The buffer where parsing should resume upon instantiation completion. | ||||||
93 | unsigned ExitBuffer; | ||||||
94 | |||||||
95 | /// The location where parsing should resume upon instantiation completion. | ||||||
96 | SMLoc ExitLoc; | ||||||
97 | |||||||
98 | /// The depth of TheCondStack at the start of the instantiation. | ||||||
99 | size_t CondStackDepth; | ||||||
100 | }; | ||||||
101 | |||||||
102 | struct ParseStatementInfo { | ||||||
103 | /// The parsed operands from the last parsed statement. | ||||||
104 | SmallVector<std::unique_ptr<MCParsedAsmOperand>, 8> ParsedOperands; | ||||||
105 | |||||||
106 | /// The opcode from the last parsed instruction. | ||||||
107 | unsigned Opcode = ~0U; | ||||||
108 | |||||||
109 | /// Was there an error parsing the inline assembly? | ||||||
110 | bool ParseError = false; | ||||||
111 | |||||||
112 | SmallVectorImpl<AsmRewrite> *AsmRewrites = nullptr; | ||||||
113 | |||||||
114 | ParseStatementInfo() = delete; | ||||||
115 | ParseStatementInfo(SmallVectorImpl<AsmRewrite> *rewrites) | ||||||
116 | : AsmRewrites(rewrites) {} | ||||||
117 | }; | ||||||
118 | |||||||
119 | /// The concrete assembly parser instance. | ||||||
120 | class AsmParser : public MCAsmParser { | ||||||
121 | private: | ||||||
122 | AsmLexer Lexer; | ||||||
123 | MCContext &Ctx; | ||||||
124 | MCStreamer &Out; | ||||||
125 | const MCAsmInfo &MAI; | ||||||
126 | SourceMgr &SrcMgr; | ||||||
127 | SourceMgr::DiagHandlerTy SavedDiagHandler; | ||||||
128 | void *SavedDiagContext; | ||||||
129 | std::unique_ptr<MCAsmParserExtension> PlatformParser; | ||||||
130 | SMLoc StartTokLoc; | ||||||
131 | |||||||
132 | /// This is the current buffer index we're lexing from as managed by the | ||||||
133 | /// SourceMgr object. | ||||||
134 | unsigned CurBuffer; | ||||||
135 | |||||||
136 | AsmCond TheCondState; | ||||||
137 | std::vector<AsmCond> TheCondStack; | ||||||
138 | |||||||
139 | /// maps directive names to handler methods in parser | ||||||
140 | /// extensions. Extensions register themselves in this map by calling | ||||||
141 | /// addDirectiveHandler. | ||||||
142 | StringMap<ExtensionDirectiveHandler> ExtensionDirectiveMap; | ||||||
143 | |||||||
144 | /// Stack of active macro instantiations. | ||||||
145 | std::vector<MacroInstantiation*> ActiveMacros; | ||||||
146 | |||||||
147 | /// List of bodies of anonymous macros. | ||||||
148 | std::deque<MCAsmMacro> MacroLikeBodies; | ||||||
149 | |||||||
150 | /// Boolean tracking whether macro substitution is enabled. | ||||||
151 | unsigned MacrosEnabledFlag : 1; | ||||||
152 | |||||||
153 | /// Keeps track of how many .macro's have been instantiated. | ||||||
154 | unsigned NumOfMacroInstantiations; | ||||||
155 | |||||||
156 | /// The values from the last parsed cpp hash file line comment if any. | ||||||
157 | struct CppHashInfoTy { | ||||||
158 | StringRef Filename; | ||||||
159 | int64_t LineNumber; | ||||||
160 | SMLoc Loc; | ||||||
161 | unsigned Buf; | ||||||
162 | CppHashInfoTy() : Filename(), LineNumber(0), Loc(), Buf(0) {} | ||||||
163 | }; | ||||||
164 | CppHashInfoTy CppHashInfo; | ||||||
165 | |||||||
166 | /// The filename from the first cpp hash file line comment, if any. | ||||||
167 | StringRef FirstCppHashFilename; | ||||||
168 | |||||||
169 | /// List of forward directional labels for diagnosis at the end. | ||||||
170 | SmallVector<std::tuple<SMLoc, CppHashInfoTy, MCSymbol *>, 4> DirLabels; | ||||||
171 | |||||||
172 | SmallSet<StringRef, 2> LTODiscardSymbols; | ||||||
173 | |||||||
174 | /// AssemblerDialect. ~OU means unset value and use value provided by MAI. | ||||||
175 | unsigned AssemblerDialect = ~0U; | ||||||
176 | |||||||
177 | /// is Darwin compatibility enabled? | ||||||
178 | bool IsDarwin = false; | ||||||
179 | |||||||
180 | /// Are we parsing ms-style inline assembly? | ||||||
181 | bool ParsingMSInlineAsm = false; | ||||||
182 | |||||||
183 | /// Did we already inform the user about inconsistent MD5 usage? | ||||||
184 | bool ReportedInconsistentMD5 = false; | ||||||
185 | |||||||
186 | // Is alt macro mode enabled. | ||||||
187 | bool AltMacroMode = false; | ||||||
188 | |||||||
189 | public: | ||||||
190 | AsmParser(SourceMgr &SM, MCContext &Ctx, MCStreamer &Out, | ||||||
191 | const MCAsmInfo &MAI, unsigned CB); | ||||||
192 | AsmParser(const AsmParser &) = delete; | ||||||
193 | AsmParser &operator=(const AsmParser &) = delete; | ||||||
194 | ~AsmParser() override; | ||||||
195 | |||||||
196 | bool Run(bool NoInitialTextSection, bool NoFinalize = false) override; | ||||||
197 | |||||||
198 | void addDirectiveHandler(StringRef Directive, | ||||||
199 | ExtensionDirectiveHandler Handler) override { | ||||||
200 | ExtensionDirectiveMap[Directive] = Handler; | ||||||
201 | } | ||||||
202 | |||||||
203 | void addAliasForDirective(StringRef Directive, StringRef Alias) override { | ||||||
204 | DirectiveKindMap[Directive.lower()] = DirectiveKindMap[Alias.lower()]; | ||||||
205 | } | ||||||
206 | |||||||
207 | /// @name MCAsmParser Interface | ||||||
208 | /// { | ||||||
209 | |||||||
210 | SourceMgr &getSourceManager() override { return SrcMgr; } | ||||||
211 | MCAsmLexer &getLexer() override { return Lexer; } | ||||||
212 | MCContext &getContext() override { return Ctx; } | ||||||
213 | MCStreamer &getStreamer() override { return Out; } | ||||||
214 | |||||||
215 | CodeViewContext &getCVContext() { return Ctx.getCVContext(); } | ||||||
216 | |||||||
217 | unsigned getAssemblerDialect() override { | ||||||
218 | if (AssemblerDialect == ~0U) | ||||||
219 | return MAI.getAssemblerDialect(); | ||||||
220 | else | ||||||
221 | return AssemblerDialect; | ||||||
222 | } | ||||||
223 | void setAssemblerDialect(unsigned i) override { | ||||||
224 | AssemblerDialect = i; | ||||||
225 | } | ||||||
226 | |||||||
227 | void Note(SMLoc L, const Twine &Msg, SMRange Range = None) override; | ||||||
228 | bool Warning(SMLoc L, const Twine &Msg, SMRange Range = None) override; | ||||||
229 | bool printError(SMLoc L, const Twine &Msg, SMRange Range = None) override; | ||||||
230 | |||||||
231 | const AsmToken &Lex() override; | ||||||
232 | |||||||
233 | void setParsingMSInlineAsm(bool V) override { | ||||||
234 | ParsingMSInlineAsm = V; | ||||||
235 | // When parsing MS inline asm, we must lex 0b1101 and 0ABCH as binary and | ||||||
236 | // hex integer literals. | ||||||
237 | Lexer.setLexMasmIntegers(V); | ||||||
238 | } | ||||||
239 | bool isParsingMSInlineAsm() override { return ParsingMSInlineAsm; } | ||||||
240 | |||||||
241 | bool discardLTOSymbol(StringRef Name) const override { | ||||||
242 | return LTODiscardSymbols.contains(Name); | ||||||
243 | } | ||||||
244 | |||||||
245 | bool parseMSInlineAsm(void *AsmLoc, std::string &AsmString, | ||||||
246 | unsigned &NumOutputs, unsigned &NumInputs, | ||||||
247 | SmallVectorImpl<std::pair<void *,bool>> &OpDecls, | ||||||
248 | SmallVectorImpl<std::string> &Constraints, | ||||||
249 | SmallVectorImpl<std::string> &Clobbers, | ||||||
250 | const MCInstrInfo *MII, const MCInstPrinter *IP, | ||||||
251 | MCAsmParserSemaCallback &SI) override; | ||||||
252 | |||||||
253 | bool parseExpression(const MCExpr *&Res); | ||||||
254 | bool parseExpression(const MCExpr *&Res, SMLoc &EndLoc) override; | ||||||
255 | bool parsePrimaryExpr(const MCExpr *&Res, SMLoc &EndLoc, | ||||||
256 | AsmTypeInfo *TypeInfo) override; | ||||||
257 | bool parseParenExpression(const MCExpr *&Res, SMLoc &EndLoc) override; | ||||||
258 | bool parseParenExprOfDepth(unsigned ParenDepth, const MCExpr *&Res, | ||||||
259 | SMLoc &EndLoc) override; | ||||||
260 | bool parseAbsoluteExpression(int64_t &Res) override; | ||||||
261 | |||||||
262 | /// Parse a floating point expression using the float \p Semantics | ||||||
263 | /// and set \p Res to the value. | ||||||
264 | bool parseRealValue(const fltSemantics &Semantics, APInt &Res); | ||||||
265 | |||||||
266 | /// Parse an identifier or string (as a quoted identifier) | ||||||
267 | /// and set \p Res to the identifier contents. | ||||||
268 | bool parseIdentifier(StringRef &Res) override; | ||||||
269 | void eatToEndOfStatement() override; | ||||||
270 | |||||||
271 | bool checkForValidSection() override; | ||||||
272 | |||||||
273 | /// } | ||||||
274 | |||||||
275 | private: | ||||||
276 | bool parseStatement(ParseStatementInfo &Info, | ||||||
277 | MCAsmParserSemaCallback *SI); | ||||||
278 | bool parseCurlyBlockScope(SmallVectorImpl<AsmRewrite>& AsmStrRewrites); | ||||||
279 | bool parseCppHashLineFilenameComment(SMLoc L, bool SaveLocInfo = true); | ||||||
280 | |||||||
281 | void checkForBadMacro(SMLoc DirectiveLoc, StringRef Name, StringRef Body, | ||||||
282 | ArrayRef<MCAsmMacroParameter> Parameters); | ||||||
283 | bool expandMacro(raw_svector_ostream &OS, StringRef Body, | ||||||
284 | ArrayRef<MCAsmMacroParameter> Parameters, | ||||||
285 | ArrayRef<MCAsmMacroArgument> A, bool EnableAtPseudoVariable, | ||||||
286 | SMLoc L); | ||||||
287 | |||||||
288 | /// Are macros enabled in the parser? | ||||||
289 | bool areMacrosEnabled() {return MacrosEnabledFlag;} | ||||||
290 | |||||||
291 | /// Control a flag in the parser that enables or disables macros. | ||||||
292 | void setMacrosEnabled(bool Flag) {MacrosEnabledFlag = Flag;} | ||||||
293 | |||||||
294 | /// Are we inside a macro instantiation? | ||||||
295 | bool isInsideMacroInstantiation() {return !ActiveMacros.empty();} | ||||||
296 | |||||||
297 | /// Handle entry to macro instantiation. | ||||||
298 | /// | ||||||
299 | /// \param M The macro. | ||||||
300 | /// \param NameLoc Instantiation location. | ||||||
301 | bool handleMacroEntry(const MCAsmMacro *M, SMLoc NameLoc); | ||||||
302 | |||||||
303 | /// Handle exit from macro instantiation. | ||||||
304 | void handleMacroExit(); | ||||||
305 | |||||||
306 | /// Extract AsmTokens for a macro argument. | ||||||
307 | bool parseMacroArgument(MCAsmMacroArgument &MA, bool Vararg); | ||||||
308 | |||||||
309 | /// Parse all macro arguments for a given macro. | ||||||
310 | bool parseMacroArguments(const MCAsmMacro *M, MCAsmMacroArguments &A); | ||||||
311 | |||||||
312 | void printMacroInstantiations(); | ||||||
313 | void printMessage(SMLoc Loc, SourceMgr::DiagKind Kind, const Twine &Msg, | ||||||
314 | SMRange Range = None) const { | ||||||
315 | ArrayRef<SMRange> Ranges(Range); | ||||||
316 | SrcMgr.PrintMessage(Loc, Kind, Msg, Ranges); | ||||||
317 | } | ||||||
318 | static void DiagHandler(const SMDiagnostic &Diag, void *Context); | ||||||
319 | |||||||
320 | /// Should we emit DWARF describing this assembler source? (Returns false if | ||||||
321 | /// the source has .file directives, which means we don't want to generate | ||||||
322 | /// info describing the assembler source itself.) | ||||||
323 | bool enabledGenDwarfForAssembly(); | ||||||
324 | |||||||
325 | /// Enter the specified file. This returns true on failure. | ||||||
326 | bool enterIncludeFile(const std::string &Filename); | ||||||
327 | |||||||
328 | /// Process the specified file for the .incbin directive. | ||||||
329 | /// This returns true on failure. | ||||||
330 | bool processIncbinFile(const std::string &Filename, int64_t Skip = 0, | ||||||
331 | const MCExpr *Count = nullptr, SMLoc Loc = SMLoc()); | ||||||
332 | |||||||
333 | /// Reset the current lexer position to that given by \p Loc. The | ||||||
334 | /// current token is not set; clients should ensure Lex() is called | ||||||
335 | /// subsequently. | ||||||
336 | /// | ||||||
337 | /// \param InBuffer If not 0, should be the known buffer id that contains the | ||||||
338 | /// location. | ||||||
339 | void jumpToLoc(SMLoc Loc, unsigned InBuffer = 0); | ||||||
340 | |||||||
341 | /// Parse up to the end of statement and a return the contents from the | ||||||
342 | /// current token until the end of the statement; the current token on exit | ||||||
343 | /// will be either the EndOfStatement or EOF. | ||||||
344 | StringRef parseStringToEndOfStatement() override; | ||||||
345 | |||||||
346 | /// Parse until the end of a statement or a comma is encountered, | ||||||
347 | /// return the contents from the current token up to the end or comma. | ||||||
348 | StringRef parseStringToComma(); | ||||||
349 | |||||||
350 | bool parseAssignment(StringRef Name, bool allow_redef, | ||||||
351 | bool NoDeadStrip = false); | ||||||
352 | |||||||
353 | unsigned getBinOpPrecedence(AsmToken::TokenKind K, | ||||||
354 | MCBinaryExpr::Opcode &Kind); | ||||||
355 | |||||||
356 | bool parseBinOpRHS(unsigned Precedence, const MCExpr *&Res, SMLoc &EndLoc); | ||||||
357 | bool parseParenExpr(const MCExpr *&Res, SMLoc &EndLoc); | ||||||
358 | bool parseBracketExpr(const MCExpr *&Res, SMLoc &EndLoc); | ||||||
359 | |||||||
360 | bool parseRegisterOrRegisterNumber(int64_t &Register, SMLoc DirectiveLoc); | ||||||
361 | |||||||
362 | bool parseCVFunctionId(int64_t &FunctionId, StringRef DirectiveName); | ||||||
363 | bool parseCVFileId(int64_t &FileId, StringRef DirectiveName); | ||||||
364 | |||||||
365 | // Generic (target and platform independent) directive parsing. | ||||||
366 | enum DirectiveKind { | ||||||
367 | DK_NO_DIRECTIVE, // Placeholder | ||||||
368 | DK_SET, | ||||||
369 | DK_EQU, | ||||||
370 | DK_EQUIV, | ||||||
371 | DK_ASCII, | ||||||
372 | DK_ASCIZ, | ||||||
373 | DK_STRING, | ||||||
374 | DK_BYTE, | ||||||
375 | DK_SHORT, | ||||||
376 | DK_RELOC, | ||||||
377 | DK_VALUE, | ||||||
378 | DK_2BYTE, | ||||||
379 | DK_LONG, | ||||||
380 | DK_INT, | ||||||
381 | DK_4BYTE, | ||||||
382 | DK_QUAD, | ||||||
383 | DK_8BYTE, | ||||||
384 | DK_OCTA, | ||||||
385 | DK_DC, | ||||||
386 | DK_DC_A, | ||||||
387 | DK_DC_B, | ||||||
388 | DK_DC_D, | ||||||
389 | DK_DC_L, | ||||||
390 | DK_DC_S, | ||||||
391 | DK_DC_W, | ||||||
392 | DK_DC_X, | ||||||
393 | DK_DCB, | ||||||
394 | DK_DCB_B, | ||||||
395 | DK_DCB_D, | ||||||
396 | DK_DCB_L, | ||||||
397 | DK_DCB_S, | ||||||
398 | DK_DCB_W, | ||||||
399 | DK_DCB_X, | ||||||
400 | DK_DS, | ||||||
401 | DK_DS_B, | ||||||
402 | DK_DS_D, | ||||||
403 | DK_DS_L, | ||||||
404 | DK_DS_P, | ||||||
405 | DK_DS_S, | ||||||
406 | DK_DS_W, | ||||||
407 | DK_DS_X, | ||||||
408 | DK_SINGLE, | ||||||
409 | DK_FLOAT, | ||||||
410 | DK_DOUBLE, | ||||||
411 | DK_ALIGN, | ||||||
412 | DK_ALIGN32, | ||||||
413 | DK_BALIGN, | ||||||
414 | DK_BALIGNW, | ||||||
415 | DK_BALIGNL, | ||||||
416 | DK_P2ALIGN, | ||||||
417 | DK_P2ALIGNW, | ||||||
418 | DK_P2ALIGNL, | ||||||
419 | DK_ORG, | ||||||
420 | DK_FILL, | ||||||
421 | DK_ENDR, | ||||||
422 | DK_BUNDLE_ALIGN_MODE, | ||||||
423 | DK_BUNDLE_LOCK, | ||||||
424 | DK_BUNDLE_UNLOCK, | ||||||
425 | DK_ZERO, | ||||||
426 | DK_EXTERN, | ||||||
427 | DK_GLOBL, | ||||||
428 | DK_GLOBAL, | ||||||
429 | DK_LAZY_REFERENCE, | ||||||
430 | DK_NO_DEAD_STRIP, | ||||||
431 | DK_SYMBOL_RESOLVER, | ||||||
432 | DK_PRIVATE_EXTERN, | ||||||
433 | DK_REFERENCE, | ||||||
434 | DK_WEAK_DEFINITION, | ||||||
435 | DK_WEAK_REFERENCE, | ||||||
436 | DK_WEAK_DEF_CAN_BE_HIDDEN, | ||||||
437 | DK_COLD, | ||||||
438 | DK_COMM, | ||||||
439 | DK_COMMON, | ||||||
440 | DK_LCOMM, | ||||||
441 | DK_ABORT, | ||||||
442 | DK_INCLUDE, | ||||||
443 | DK_INCBIN, | ||||||
444 | DK_CODE16, | ||||||
445 | DK_CODE16GCC, | ||||||
446 | DK_REPT, | ||||||
447 | DK_IRP, | ||||||
448 | DK_IRPC, | ||||||
449 | DK_IF, | ||||||
450 | DK_IFEQ, | ||||||
451 | DK_IFGE, | ||||||
452 | DK_IFGT, | ||||||
453 | DK_IFLE, | ||||||
454 | DK_IFLT, | ||||||
455 | DK_IFNE, | ||||||
456 | DK_IFB, | ||||||
457 | DK_IFNB, | ||||||
458 | DK_IFC, | ||||||
459 | DK_IFEQS, | ||||||
460 | DK_IFNC, | ||||||
461 | DK_IFNES, | ||||||
462 | DK_IFDEF, | ||||||
463 | DK_IFNDEF, | ||||||
464 | DK_IFNOTDEF, | ||||||
465 | DK_ELSEIF, | ||||||
466 | DK_ELSE, | ||||||
467 | DK_ENDIF, | ||||||
468 | DK_SPACE, | ||||||
469 | DK_SKIP, | ||||||
470 | DK_FILE, | ||||||
471 | DK_LINE, | ||||||
472 | DK_LOC, | ||||||
473 | DK_STABS, | ||||||
474 | DK_CV_FILE, | ||||||
475 | DK_CV_FUNC_ID, | ||||||
476 | DK_CV_INLINE_SITE_ID, | ||||||
477 | DK_CV_LOC, | ||||||
478 | DK_CV_LINETABLE, | ||||||
479 | DK_CV_INLINE_LINETABLE, | ||||||
480 | DK_CV_DEF_RANGE, | ||||||
481 | DK_CV_STRINGTABLE, | ||||||
482 | DK_CV_STRING, | ||||||
483 | DK_CV_FILECHECKSUMS, | ||||||
484 | DK_CV_FILECHECKSUM_OFFSET, | ||||||
485 | DK_CV_FPO_DATA, | ||||||
486 | DK_CFI_SECTIONS, | ||||||
487 | DK_CFI_STARTPROC, | ||||||
488 | DK_CFI_ENDPROC, | ||||||
489 | DK_CFI_DEF_CFA, | ||||||
490 | DK_CFI_DEF_CFA_OFFSET, | ||||||
491 | DK_CFI_ADJUST_CFA_OFFSET, | ||||||
492 | DK_CFI_DEF_CFA_REGISTER, | ||||||
493 | DK_CFI_OFFSET, | ||||||
494 | DK_CFI_REL_OFFSET, | ||||||
495 | DK_CFI_PERSONALITY, | ||||||
496 | DK_CFI_LSDA, | ||||||
497 | DK_CFI_REMEMBER_STATE, | ||||||
498 | DK_CFI_RESTORE_STATE, | ||||||
499 | DK_CFI_SAME_VALUE, | ||||||
500 | DK_CFI_RESTORE, | ||||||
501 | DK_CFI_ESCAPE, | ||||||
502 | DK_CFI_RETURN_COLUMN, | ||||||
503 | DK_CFI_SIGNAL_FRAME, | ||||||
504 | DK_CFI_UNDEFINED, | ||||||
505 | DK_CFI_REGISTER, | ||||||
506 | DK_CFI_WINDOW_SAVE, | ||||||
507 | DK_CFI_B_KEY_FRAME, | ||||||
508 | DK_MACROS_ON, | ||||||
509 | DK_MACROS_OFF, | ||||||
510 | DK_ALTMACRO, | ||||||
511 | DK_NOALTMACRO, | ||||||
512 | DK_MACRO, | ||||||
513 | DK_EXITM, | ||||||
514 | DK_ENDM, | ||||||
515 | DK_ENDMACRO, | ||||||
516 | DK_PURGEM, | ||||||
517 | DK_SLEB128, | ||||||
518 | DK_ULEB128, | ||||||
519 | DK_ERR, | ||||||
520 | DK_ERROR, | ||||||
521 | DK_WARNING, | ||||||
522 | DK_PRINT, | ||||||
523 | DK_ADDRSIG, | ||||||
524 | DK_ADDRSIG_SYM, | ||||||
525 | DK_PSEUDO_PROBE, | ||||||
526 | DK_LTO_DISCARD, | ||||||
527 | DK_END | ||||||
528 | }; | ||||||
529 | |||||||
530 | /// Maps directive name --> DirectiveKind enum, for | ||||||
531 | /// directives parsed by this class. | ||||||
532 | StringMap<DirectiveKind> DirectiveKindMap; | ||||||
533 | |||||||
534 | // Codeview def_range type parsing. | ||||||
535 | enum CVDefRangeType { | ||||||
536 | CVDR_DEFRANGE = 0, // Placeholder | ||||||
537 | CVDR_DEFRANGE_REGISTER, | ||||||
538 | CVDR_DEFRANGE_FRAMEPOINTER_REL, | ||||||
539 | CVDR_DEFRANGE_SUBFIELD_REGISTER, | ||||||
540 | CVDR_DEFRANGE_REGISTER_REL | ||||||
541 | }; | ||||||
542 | |||||||
543 | /// Maps Codeview def_range types --> CVDefRangeType enum, for | ||||||
544 | /// Codeview def_range types parsed by this class. | ||||||
545 | StringMap<CVDefRangeType> CVDefRangeTypeMap; | ||||||
546 | |||||||
547 | // ".ascii", ".asciz", ".string" | ||||||
548 | bool parseDirectiveAscii(StringRef IDVal, bool ZeroTerminated); | ||||||
549 | bool parseDirectiveReloc(SMLoc DirectiveLoc); // ".reloc" | ||||||
550 | bool parseDirectiveValue(StringRef IDVal, | ||||||
551 | unsigned Size); // ".byte", ".long", ... | ||||||
552 | bool parseDirectiveOctaValue(StringRef IDVal); // ".octa", ... | ||||||
553 | bool parseDirectiveRealValue(StringRef IDVal, | ||||||
554 | const fltSemantics &); // ".single", ... | ||||||
555 | bool parseDirectiveFill(); // ".fill" | ||||||
556 | bool parseDirectiveZero(); // ".zero" | ||||||
557 | // ".set", ".equ", ".equiv" | ||||||
558 | bool parseDirectiveSet(StringRef IDVal, bool allow_redef); | ||||||
559 | bool parseDirectiveOrg(); // ".org" | ||||||
560 | // ".align{,32}", ".p2align{,w,l}" | ||||||
561 | bool parseDirectiveAlign(bool IsPow2, unsigned ValueSize); | ||||||
562 | |||||||
563 | // ".file", ".line", ".loc", ".stabs" | ||||||
564 | bool parseDirectiveFile(SMLoc DirectiveLoc); | ||||||
565 | bool parseDirectiveLine(); | ||||||
566 | bool parseDirectiveLoc(); | ||||||
567 | bool parseDirectiveStabs(); | ||||||
568 | |||||||
569 | // ".cv_file", ".cv_func_id", ".cv_inline_site_id", ".cv_loc", ".cv_linetable", | ||||||
570 | // ".cv_inline_linetable", ".cv_def_range", ".cv_string" | ||||||
571 | bool parseDirectiveCVFile(); | ||||||
572 | bool parseDirectiveCVFuncId(); | ||||||
573 | bool parseDirectiveCVInlineSiteId(); | ||||||
574 | bool parseDirectiveCVLoc(); | ||||||
575 | bool parseDirectiveCVLinetable(); | ||||||
576 | bool parseDirectiveCVInlineLinetable(); | ||||||
577 | bool parseDirectiveCVDefRange(); | ||||||
578 | bool parseDirectiveCVString(); | ||||||
579 | bool parseDirectiveCVStringTable(); | ||||||
580 | bool parseDirectiveCVFileChecksums(); | ||||||
581 | bool parseDirectiveCVFileChecksumOffset(); | ||||||
582 | bool parseDirectiveCVFPOData(); | ||||||
583 | |||||||
584 | // .cfi directives | ||||||
585 | bool parseDirectiveCFIRegister(SMLoc DirectiveLoc); | ||||||
586 | bool parseDirectiveCFIWindowSave(); | ||||||
587 | bool parseDirectiveCFISections(); | ||||||
588 | bool parseDirectiveCFIStartProc(); | ||||||
589 | bool parseDirectiveCFIEndProc(); | ||||||
590 | bool parseDirectiveCFIDefCfaOffset(); | ||||||
591 | bool parseDirectiveCFIDefCfa(SMLoc DirectiveLoc); | ||||||
592 | bool parseDirectiveCFIAdjustCfaOffset(); | ||||||
593 | bool parseDirectiveCFIDefCfaRegister(SMLoc DirectiveLoc); | ||||||
594 | bool parseDirectiveCFIOffset(SMLoc DirectiveLoc); | ||||||
595 | bool parseDirectiveCFIRelOffset(SMLoc DirectiveLoc); | ||||||
596 | bool parseDirectiveCFIPersonalityOrLsda(bool IsPersonality); | ||||||
597 | bool parseDirectiveCFIRememberState(); | ||||||
598 | bool parseDirectiveCFIRestoreState(); | ||||||
599 | bool parseDirectiveCFISameValue(SMLoc DirectiveLoc); | ||||||
600 | bool parseDirectiveCFIRestore(SMLoc DirectiveLoc); | ||||||
601 | bool parseDirectiveCFIEscape(); | ||||||
602 | bool parseDirectiveCFIReturnColumn(SMLoc DirectiveLoc); | ||||||
603 | bool parseDirectiveCFISignalFrame(); | ||||||
604 | bool parseDirectiveCFIUndefined(SMLoc DirectiveLoc); | ||||||
605 | |||||||
606 | // macro directives | ||||||
607 | bool parseDirectivePurgeMacro(SMLoc DirectiveLoc); | ||||||
608 | bool parseDirectiveExitMacro(StringRef Directive); | ||||||
609 | bool parseDirectiveEndMacro(StringRef Directive); | ||||||
610 | bool parseDirectiveMacro(SMLoc DirectiveLoc); | ||||||
611 | bool parseDirectiveMacrosOnOff(StringRef Directive); | ||||||
612 | // alternate macro mode directives | ||||||
613 | bool parseDirectiveAltmacro(StringRef Directive); | ||||||
614 | // ".bundle_align_mode" | ||||||
615 | bool parseDirectiveBundleAlignMode(); | ||||||
616 | // ".bundle_lock" | ||||||
617 | bool parseDirectiveBundleLock(); | ||||||
618 | // ".bundle_unlock" | ||||||
619 | bool parseDirectiveBundleUnlock(); | ||||||
620 | |||||||
621 | // ".space", ".skip" | ||||||
622 | bool parseDirectiveSpace(StringRef IDVal); | ||||||
623 | |||||||
624 | // ".dcb" | ||||||
625 | bool parseDirectiveDCB(StringRef IDVal, unsigned Size); | ||||||
626 | bool parseDirectiveRealDCB(StringRef IDVal, const fltSemantics &); | ||||||
627 | // ".ds" | ||||||
628 | bool parseDirectiveDS(StringRef IDVal, unsigned Size); | ||||||
629 | |||||||
630 | // .sleb128 (Signed=true) and .uleb128 (Signed=false) | ||||||
631 | bool parseDirectiveLEB128(bool Signed); | ||||||
632 | |||||||
633 | /// Parse a directive like ".globl" which | ||||||
634 | /// accepts a single symbol (which should be a label or an external). | ||||||
635 | bool parseDirectiveSymbolAttribute(MCSymbolAttr Attr); | ||||||
636 | |||||||
637 | bool parseDirectiveComm(bool IsLocal); // ".comm" and ".lcomm" | ||||||
638 | |||||||
639 | bool parseDirectiveAbort(); // ".abort" | ||||||
640 | bool parseDirectiveInclude(); // ".include" | ||||||
641 | bool parseDirectiveIncbin(); // ".incbin" | ||||||
642 | |||||||
643 | // ".if", ".ifeq", ".ifge", ".ifgt" , ".ifle", ".iflt" or ".ifne" | ||||||
644 | bool parseDirectiveIf(SMLoc DirectiveLoc, DirectiveKind DirKind); | ||||||
645 | // ".ifb" or ".ifnb", depending on ExpectBlank. | ||||||
646 | bool parseDirectiveIfb(SMLoc DirectiveLoc, bool ExpectBlank); | ||||||
647 | // ".ifc" or ".ifnc", depending on ExpectEqual. | ||||||
648 | bool parseDirectiveIfc(SMLoc DirectiveLoc, bool ExpectEqual); | ||||||
649 | // ".ifeqs" or ".ifnes", depending on ExpectEqual. | ||||||
650 | bool parseDirectiveIfeqs(SMLoc DirectiveLoc, bool ExpectEqual); | ||||||
651 | // ".ifdef" or ".ifndef", depending on expect_defined | ||||||
652 | bool parseDirectiveIfdef(SMLoc DirectiveLoc, bool expect_defined); | ||||||
653 | bool parseDirectiveElseIf(SMLoc DirectiveLoc); // ".elseif" | ||||||
654 | bool parseDirectiveElse(SMLoc DirectiveLoc); // ".else" | ||||||
655 | bool parseDirectiveEndIf(SMLoc DirectiveLoc); // .endif | ||||||
656 | bool parseEscapedString(std::string &Data) override; | ||||||
657 | bool parseAngleBracketString(std::string &Data) override; | ||||||
658 | |||||||
659 | const MCExpr *applyModifierToExpr(const MCExpr *E, | ||||||
660 | MCSymbolRefExpr::VariantKind Variant); | ||||||
661 | |||||||
662 | // Macro-like directives | ||||||
663 | MCAsmMacro *parseMacroLikeBody(SMLoc DirectiveLoc); | ||||||
664 | void instantiateMacroLikeBody(MCAsmMacro *M, SMLoc DirectiveLoc, | ||||||
665 | raw_svector_ostream &OS); | ||||||
666 | bool parseDirectiveRept(SMLoc DirectiveLoc, StringRef Directive); | ||||||
667 | bool parseDirectiveIrp(SMLoc DirectiveLoc); // ".irp" | ||||||
668 | bool parseDirectiveIrpc(SMLoc DirectiveLoc); // ".irpc" | ||||||
669 | bool parseDirectiveEndr(SMLoc DirectiveLoc); // ".endr" | ||||||
670 | |||||||
671 | // "_emit" or "__emit" | ||||||
672 | bool parseDirectiveMSEmit(SMLoc DirectiveLoc, ParseStatementInfo &Info, | ||||||
673 | size_t Len); | ||||||
674 | |||||||
675 | // "align" | ||||||
676 | bool parseDirectiveMSAlign(SMLoc DirectiveLoc, ParseStatementInfo &Info); | ||||||
677 | |||||||
678 | // "end" | ||||||
679 | bool parseDirectiveEnd(SMLoc DirectiveLoc); | ||||||
680 | |||||||
681 | // ".err" or ".error" | ||||||
682 | bool parseDirectiveError(SMLoc DirectiveLoc, bool WithMessage); | ||||||
683 | |||||||
684 | // ".warning" | ||||||
685 | bool parseDirectiveWarning(SMLoc DirectiveLoc); | ||||||
686 | |||||||
687 | // .print <double-quotes-string> | ||||||
688 | bool parseDirectivePrint(SMLoc DirectiveLoc); | ||||||
689 | |||||||
690 | // .pseudoprobe | ||||||
691 | bool parseDirectivePseudoProbe(); | ||||||
692 | |||||||
693 | // ".lto_discard" | ||||||
694 | bool parseDirectiveLTODiscard(); | ||||||
695 | |||||||
696 | // Directives to support address-significance tables. | ||||||
697 | bool parseDirectiveAddrsig(); | ||||||
698 | bool parseDirectiveAddrsigSym(); | ||||||
699 | |||||||
700 | void initializeDirectiveKindMap(); | ||||||
701 | void initializeCVDefRangeTypeMap(); | ||||||
702 | }; | ||||||
703 | |||||||
704 | } // end anonymous namespace | ||||||
705 | |||||||
706 | namespace llvm { | ||||||
707 | |||||||
708 | extern MCAsmParserExtension *createDarwinAsmParser(); | ||||||
709 | extern MCAsmParserExtension *createELFAsmParser(); | ||||||
710 | extern MCAsmParserExtension *createCOFFAsmParser(); | ||||||
711 | extern MCAsmParserExtension *createWasmAsmParser(); | ||||||
712 | |||||||
713 | } // end namespace llvm | ||||||
714 | |||||||
715 | enum { DEFAULT_ADDRSPACE = 0 }; | ||||||
716 | |||||||
717 | AsmParser::AsmParser(SourceMgr &SM, MCContext &Ctx, MCStreamer &Out, | ||||||
718 | const MCAsmInfo &MAI, unsigned CB = 0) | ||||||
719 | : Lexer(MAI), Ctx(Ctx), Out(Out), MAI(MAI), SrcMgr(SM), | ||||||
720 | CurBuffer(CB ? CB : SM.getMainFileID()), MacrosEnabledFlag(true) { | ||||||
721 | HadError = false; | ||||||
722 | // Save the old handler. | ||||||
723 | SavedDiagHandler = SrcMgr.getDiagHandler(); | ||||||
724 | SavedDiagContext = SrcMgr.getDiagContext(); | ||||||
725 | // Set our own handler which calls the saved handler. | ||||||
726 | SrcMgr.setDiagHandler(DiagHandler, this); | ||||||
727 | Lexer.setBuffer(SrcMgr.getMemoryBuffer(CurBuffer)->getBuffer()); | ||||||
728 | // Make MCStreamer aware of the StartTokLoc for locations in diagnostics. | ||||||
729 | Out.setStartTokLocPtr(&StartTokLoc); | ||||||
730 | |||||||
731 | // Initialize the platform / file format parser. | ||||||
732 | switch (Ctx.getObjectFileInfo()->getObjectFileType()) { | ||||||
733 | case MCObjectFileInfo::IsCOFF: | ||||||
734 | PlatformParser.reset(createCOFFAsmParser()); | ||||||
735 | break; | ||||||
736 | case MCObjectFileInfo::IsMachO: | ||||||
737 | PlatformParser.reset(createDarwinAsmParser()); | ||||||
738 | IsDarwin = true; | ||||||
739 | break; | ||||||
740 | case MCObjectFileInfo::IsELF: | ||||||
741 | PlatformParser.reset(createELFAsmParser()); | ||||||
742 | break; | ||||||
743 | case MCObjectFileInfo::IsWasm: | ||||||
744 | PlatformParser.reset(createWasmAsmParser()); | ||||||
745 | break; | ||||||
746 | case MCObjectFileInfo::IsXCOFF: | ||||||
747 | report_fatal_error( | ||||||
748 | "Need to implement createXCOFFAsmParser for XCOFF format."); | ||||||
749 | break; | ||||||
750 | } | ||||||
751 | |||||||
752 | PlatformParser->Initialize(*this); | ||||||
753 | initializeDirectiveKindMap(); | ||||||
754 | initializeCVDefRangeTypeMap(); | ||||||
755 | |||||||
756 | NumOfMacroInstantiations = 0; | ||||||
757 | } | ||||||
758 | |||||||
759 | AsmParser::~AsmParser() { | ||||||
760 | 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~++20210405022414+5f57793c4fe4/llvm/lib/MC/MCParser/AsmParser.cpp" , 761, __PRETTY_FUNCTION__)) | ||||||
761 | "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~++20210405022414+5f57793c4fe4/llvm/lib/MC/MCParser/AsmParser.cpp" , 761, __PRETTY_FUNCTION__)); | ||||||
762 | |||||||
763 | // Remove MCStreamer's reference to the parser SMLoc. | ||||||
764 | Out.setStartTokLocPtr(nullptr); | ||||||
765 | // Restore the saved diagnostics handler and context for use during | ||||||
766 | // finalization. | ||||||
767 | SrcMgr.setDiagHandler(SavedDiagHandler, SavedDiagContext); | ||||||
768 | } | ||||||
769 | |||||||
770 | void AsmParser::printMacroInstantiations() { | ||||||
771 | // Print the active macro instantiation stack. | ||||||
772 | for (std::vector<MacroInstantiation *>::const_reverse_iterator | ||||||
773 | it = ActiveMacros.rbegin(), | ||||||
774 | ie = ActiveMacros.rend(); | ||||||
775 | it != ie; ++it) | ||||||
776 | printMessage((*it)->InstantiationLoc, SourceMgr::DK_Note, | ||||||
777 | "while in macro instantiation"); | ||||||
778 | } | ||||||
779 | |||||||
780 | void AsmParser::Note(SMLoc L, const Twine &Msg, SMRange Range) { | ||||||
781 | printPendingErrors(); | ||||||
782 | printMessage(L, SourceMgr::DK_Note, Msg, Range); | ||||||
783 | printMacroInstantiations(); | ||||||
784 | } | ||||||
785 | |||||||
786 | bool AsmParser::Warning(SMLoc L, const Twine &Msg, SMRange Range) { | ||||||
787 | if(getTargetParser().getTargetOptions().MCNoWarn) | ||||||
788 | return false; | ||||||
789 | if (getTargetParser().getTargetOptions().MCFatalWarnings) | ||||||
790 | return Error(L, Msg, Range); | ||||||
791 | printMessage(L, SourceMgr::DK_Warning, Msg, Range); | ||||||
792 | printMacroInstantiations(); | ||||||
793 | return false; | ||||||
794 | } | ||||||
795 | |||||||
796 | bool AsmParser::printError(SMLoc L, const Twine &Msg, SMRange Range) { | ||||||
797 | HadError = true; | ||||||
798 | printMessage(L, SourceMgr::DK_Error, Msg, Range); | ||||||
799 | printMacroInstantiations(); | ||||||
800 | return true; | ||||||
801 | } | ||||||
802 | |||||||
803 | bool AsmParser::enterIncludeFile(const std::string &Filename) { | ||||||
804 | std::string IncludedFile; | ||||||
805 | unsigned NewBuf = | ||||||
806 | SrcMgr.AddIncludeFile(Filename, Lexer.getLoc(), IncludedFile); | ||||||
807 | if (!NewBuf) | ||||||
808 | return true; | ||||||
809 | |||||||
810 | CurBuffer = NewBuf; | ||||||
811 | Lexer.setBuffer(SrcMgr.getMemoryBuffer(CurBuffer)->getBuffer()); | ||||||
812 | return false; | ||||||
813 | } | ||||||
814 | |||||||
815 | /// Process the specified .incbin file by searching for it in the include paths | ||||||
816 | /// then just emitting the byte contents of the file to the streamer. This | ||||||
817 | /// returns true on failure. | ||||||
818 | bool AsmParser::processIncbinFile(const std::string &Filename, int64_t Skip, | ||||||
819 | const MCExpr *Count, SMLoc Loc) { | ||||||
820 | std::string IncludedFile; | ||||||
821 | unsigned NewBuf = | ||||||
822 | SrcMgr.AddIncludeFile(Filename, Lexer.getLoc(), IncludedFile); | ||||||
823 | if (!NewBuf) | ||||||
824 | return true; | ||||||
825 | |||||||
826 | // Pick up the bytes from the file and emit them. | ||||||
827 | StringRef Bytes = SrcMgr.getMemoryBuffer(NewBuf)->getBuffer(); | ||||||
828 | Bytes = Bytes.drop_front(Skip); | ||||||
829 | if (Count) { | ||||||
830 | int64_t Res; | ||||||
831 | if (!Count->evaluateAsAbsolute(Res, getStreamer().getAssemblerPtr())) | ||||||
832 | return Error(Loc, "expected absolute expression"); | ||||||
833 | if (Res < 0) | ||||||
834 | return Warning(Loc, "negative count has no effect"); | ||||||
835 | Bytes = Bytes.take_front(Res); | ||||||
836 | } | ||||||
837 | getStreamer().emitBytes(Bytes); | ||||||
838 | return false; | ||||||
839 | } | ||||||
840 | |||||||
841 | void AsmParser::jumpToLoc(SMLoc Loc, unsigned InBuffer) { | ||||||
842 | CurBuffer = InBuffer ? InBuffer : SrcMgr.FindBufferContainingLoc(Loc); | ||||||
843 | Lexer.setBuffer(SrcMgr.getMemoryBuffer(CurBuffer)->getBuffer(), | ||||||
844 | Loc.getPointer()); | ||||||
845 | } | ||||||
846 | |||||||
847 | const AsmToken &AsmParser::Lex() { | ||||||
848 | if (Lexer.getTok().is(AsmToken::Error)) | ||||||
849 | Error(Lexer.getErrLoc(), Lexer.getErr()); | ||||||
850 | |||||||
851 | // if it's a end of statement with a comment in it | ||||||
852 | if (getTok().is(AsmToken::EndOfStatement)) { | ||||||
853 | // if this is a line comment output it. | ||||||
854 | if (!getTok().getString().empty() && getTok().getString().front() != '\n' && | ||||||
855 | getTok().getString().front() != '\r' && MAI.preserveAsmComments()) | ||||||
856 | Out.addExplicitComment(Twine(getTok().getString())); | ||||||
857 | } | ||||||
858 | |||||||
859 | const AsmToken *tok = &Lexer.Lex(); | ||||||
860 | |||||||
861 | // Parse comments here to be deferred until end of next statement. | ||||||
862 | while (tok->is(AsmToken::Comment)) { | ||||||
863 | if (MAI.preserveAsmComments()) | ||||||
864 | Out.addExplicitComment(Twine(tok->getString())); | ||||||
865 | tok = &Lexer.Lex(); | ||||||
866 | } | ||||||
867 | |||||||
868 | if (tok->is(AsmToken::Eof)) { | ||||||
869 | // If this is the end of an included file, pop the parent file off the | ||||||
870 | // include stack. | ||||||
871 | SMLoc ParentIncludeLoc = SrcMgr.getParentIncludeLoc(CurBuffer); | ||||||
872 | if (ParentIncludeLoc != SMLoc()) { | ||||||
873 | jumpToLoc(ParentIncludeLoc); | ||||||
874 | return Lex(); | ||||||
875 | } | ||||||
876 | } | ||||||
877 | |||||||
878 | return *tok; | ||||||
879 | } | ||||||
880 | |||||||
881 | bool AsmParser::enabledGenDwarfForAssembly() { | ||||||
882 | // Check whether the user specified -g. | ||||||
883 | if (!getContext().getGenDwarfForAssembly()) | ||||||
884 | return false; | ||||||
885 | // If we haven't encountered any .file directives (which would imply that | ||||||
886 | // the assembler source was produced with debug info already) then emit one | ||||||
887 | // describing the assembler source file itself. | ||||||
888 | if (getContext().getGenDwarfFileNumber() == 0) { | ||||||
889 | // Use the first #line directive for this, if any. It's preprocessed, so | ||||||
890 | // there is no checksum, and of course no source directive. | ||||||
891 | if (!FirstCppHashFilename.empty()) | ||||||
892 | getContext().setMCLineTableRootFile(/*CUID=*/0, | ||||||
893 | getContext().getCompilationDir(), | ||||||
894 | FirstCppHashFilename, | ||||||
895 | /*Cksum=*/None, /*Source=*/None); | ||||||
896 | const MCDwarfFile &RootFile = | ||||||
897 | getContext().getMCDwarfLineTable(/*CUID=*/0).getRootFile(); | ||||||
898 | getContext().setGenDwarfFileNumber(getStreamer().emitDwarfFileDirective( | ||||||
899 | /*CUID=*/0, getContext().getCompilationDir(), RootFile.Name, | ||||||
900 | RootFile.Checksum, RootFile.Source)); | ||||||
901 | } | ||||||
902 | return true; | ||||||
903 | } | ||||||
904 | |||||||
905 | bool AsmParser::Run(bool NoInitialTextSection, bool NoFinalize) { | ||||||
906 | LTODiscardSymbols.clear(); | ||||||
907 | |||||||
908 | // Create the initial section, if requested. | ||||||
909 | if (!NoInitialTextSection) | ||||||
910 | Out.InitSections(false); | ||||||
911 | |||||||
912 | // Prime the lexer. | ||||||
913 | Lex(); | ||||||
914 | |||||||
915 | HadError = false; | ||||||
916 | AsmCond StartingCondState = TheCondState; | ||||||
917 | SmallVector<AsmRewrite, 4> AsmStrRewrites; | ||||||
918 | |||||||
919 | // If we are generating dwarf for assembly source files save the initial text | ||||||
920 | // section. (Don't use enabledGenDwarfForAssembly() here, as we aren't | ||||||
921 | // emitting any actual debug info yet and haven't had a chance to parse any | ||||||
922 | // embedded .file directives.) | ||||||
923 | if (getContext().getGenDwarfForAssembly()) { | ||||||
924 | MCSection *Sec = getStreamer().getCurrentSectionOnly(); | ||||||
925 | if (!Sec->getBeginSymbol()) { | ||||||
926 | MCSymbol *SectionStartSym = getContext().createTempSymbol(); | ||||||
927 | getStreamer().emitLabel(SectionStartSym); | ||||||
928 | Sec->setBeginSymbol(SectionStartSym); | ||||||
929 | } | ||||||
930 | bool InsertResult = getContext().addGenDwarfSection(Sec); | ||||||
931 | 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~++20210405022414+5f57793c4fe4/llvm/lib/MC/MCParser/AsmParser.cpp" , 931, __PRETTY_FUNCTION__)); | ||||||
932 | (void)InsertResult; | ||||||
933 | } | ||||||
934 | |||||||
935 | getTargetParser().onBeginOfFile(); | ||||||
936 | |||||||
937 | // While we have input, parse each statement. | ||||||
938 | while (Lexer.isNot(AsmToken::Eof)) { | ||||||
939 | ParseStatementInfo Info(&AsmStrRewrites); | ||||||
940 | bool Parsed = parseStatement(Info, nullptr); | ||||||
941 | |||||||
942 | // If we have a Lexer Error we are on an Error Token. Load in Lexer Error | ||||||
943 | // for printing ErrMsg via Lex() only if no (presumably better) parser error | ||||||
944 | // exists. | ||||||
945 | if (Parsed && !hasPendingError() && Lexer.getTok().is(AsmToken::Error)) { | ||||||
946 | Lex(); | ||||||
947 | } | ||||||
948 | |||||||
949 | // parseStatement returned true so may need to emit an error. | ||||||
950 | printPendingErrors(); | ||||||
951 | |||||||
952 | // Skipping to the next line if needed. | ||||||
953 | if (Parsed && !getLexer().isAtStartOfStatement()) | ||||||
954 | eatToEndOfStatement(); | ||||||
955 | } | ||||||
956 | |||||||
957 | getTargetParser().onEndOfFile(); | ||||||
958 | printPendingErrors(); | ||||||
959 | |||||||
960 | // All errors should have been emitted. | ||||||
961 | 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~++20210405022414+5f57793c4fe4/llvm/lib/MC/MCParser/AsmParser.cpp" , 961, __PRETTY_FUNCTION__)); | ||||||
962 | |||||||
963 | getTargetParser().flushPendingInstructions(getStreamer()); | ||||||
964 | |||||||
965 | if (TheCondState.TheCond != StartingCondState.TheCond || | ||||||
966 | TheCondState.Ignore != StartingCondState.Ignore) | ||||||
967 | printError(getTok().getLoc(), "unmatched .ifs or .elses"); | ||||||
968 | // Check to see there are no empty DwarfFile slots. | ||||||
969 | const auto &LineTables = getContext().getMCDwarfLineTables(); | ||||||
970 | if (!LineTables.empty()) { | ||||||
971 | unsigned Index = 0; | ||||||
972 | for (const auto &File : LineTables.begin()->second.getMCDwarfFiles()) { | ||||||
973 | if (File.Name.empty() && Index != 0) | ||||||
974 | printError(getTok().getLoc(), "unassigned file number: " + | ||||||
975 | Twine(Index) + | ||||||
976 | " for .file directives"); | ||||||
977 | ++Index; | ||||||
978 | } | ||||||
979 | } | ||||||
980 | |||||||
981 | // Check to see that all assembler local symbols were actually defined. | ||||||
982 | // Targets that don't do subsections via symbols may not want this, though, | ||||||
983 | // so conservatively exclude them. Only do this if we're finalizing, though, | ||||||
984 | // as otherwise we won't necessarilly have seen everything yet. | ||||||
985 | if (!NoFinalize) { | ||||||
986 | if (MAI.hasSubsectionsViaSymbols()) { | ||||||
987 | for (const auto &TableEntry : getContext().getSymbols()) { | ||||||
988 | MCSymbol *Sym = TableEntry.getValue(); | ||||||
989 | // Variable symbols may not be marked as defined, so check those | ||||||
990 | // explicitly. If we know it's a variable, we have a definition for | ||||||
991 | // the purposes of this check. | ||||||
992 | if (Sym->isTemporary() && !Sym->isVariable() && !Sym->isDefined()) | ||||||
993 | // FIXME: We would really like to refer back to where the symbol was | ||||||
994 | // first referenced for a source location. We need to add something | ||||||
995 | // to track that. Currently, we just point to the end of the file. | ||||||
996 | printError(getTok().getLoc(), "assembler local symbol '" + | ||||||
997 | Sym->getName() + "' not defined"); | ||||||
998 | } | ||||||
999 | } | ||||||
1000 | |||||||
1001 | // Temporary symbols like the ones for directional jumps don't go in the | ||||||
1002 | // symbol table. They also need to be diagnosed in all (final) cases. | ||||||
1003 | for (std::tuple<SMLoc, CppHashInfoTy, MCSymbol *> &LocSym : DirLabels) { | ||||||
1004 | if (std::get<2>(LocSym)->isUndefined()) { | ||||||
1005 | // Reset the state of any "# line file" directives we've seen to the | ||||||
1006 | // context as it was at the diagnostic site. | ||||||
1007 | CppHashInfo = std::get<1>(LocSym); | ||||||
1008 | printError(std::get<0>(LocSym), "directional label undefined"); | ||||||
1009 | } | ||||||
1010 | } | ||||||
1011 | } | ||||||
1012 | |||||||
1013 | // Finalize the output stream if there are no errors and if the client wants | ||||||
1014 | // us to. | ||||||
1015 | if (!HadError && !NoFinalize) | ||||||
1016 | Out.Finish(Lexer.getLoc()); | ||||||
1017 | |||||||
1018 | return HadError || getContext().hadError(); | ||||||
1019 | } | ||||||
1020 | |||||||
1021 | bool AsmParser::checkForValidSection() { | ||||||
1022 | if (!ParsingMSInlineAsm && !getStreamer().getCurrentSectionOnly()) { | ||||||
1023 | Out.InitSections(false); | ||||||
1024 | return Error(getTok().getLoc(), | ||||||
1025 | "expected section directive before assembly directive"); | ||||||
1026 | } | ||||||
1027 | return false; | ||||||
1028 | } | ||||||
1029 | |||||||
1030 | /// Throw away the rest of the line for testing purposes. | ||||||
1031 | void AsmParser::eatToEndOfStatement() { | ||||||
1032 | while (Lexer.isNot(AsmToken::EndOfStatement) && Lexer.isNot(AsmToken::Eof)) | ||||||
1033 | Lexer.Lex(); | ||||||
1034 | |||||||
1035 | // Eat EOL. | ||||||
1036 | if (Lexer.is(AsmToken::EndOfStatement)) | ||||||
1037 | Lexer.Lex(); | ||||||
1038 | } | ||||||
1039 | |||||||
1040 | StringRef AsmParser::parseStringToEndOfStatement() { | ||||||
1041 | const char *Start = getTok().getLoc().getPointer(); | ||||||
1042 | |||||||
1043 | while (Lexer.isNot(AsmToken::EndOfStatement) && Lexer.isNot(AsmToken::Eof)) | ||||||
1044 | Lexer.Lex(); | ||||||
1045 | |||||||
1046 | const char *End = getTok().getLoc().getPointer(); | ||||||
1047 | return StringRef(Start, End - Start); | ||||||
1048 | } | ||||||
1049 | |||||||
1050 | StringRef AsmParser::parseStringToComma() { | ||||||
1051 | const char *Start = getTok().getLoc().getPointer(); | ||||||
1052 | |||||||
1053 | while (Lexer.isNot(AsmToken::EndOfStatement) && | ||||||
1054 | Lexer.isNot(AsmToken::Comma) && Lexer.isNot(AsmToken::Eof)) | ||||||
1055 | Lexer.Lex(); | ||||||
1056 | |||||||
1057 | const char *End = getTok().getLoc().getPointer(); | ||||||
1058 | return StringRef(Start, End - Start); | ||||||
1059 | } | ||||||
1060 | |||||||
1061 | /// Parse a paren expression and return it. | ||||||
1062 | /// NOTE: This assumes the leading '(' has already been consumed. | ||||||
1063 | /// | ||||||
1064 | /// parenexpr ::= expr) | ||||||
1065 | /// | ||||||
1066 | bool AsmParser::parseParenExpr(const MCExpr *&Res, SMLoc &EndLoc) { | ||||||
1067 | if (parseExpression(Res)) | ||||||
1068 | return true; | ||||||
1069 | if (Lexer.isNot(AsmToken::RParen)) | ||||||
1070 | return TokError("expected ')' in parentheses expression"); | ||||||
1071 | EndLoc = Lexer.getTok().getEndLoc(); | ||||||
1072 | Lex(); | ||||||
1073 | return false; | ||||||
1074 | } | ||||||
1075 | |||||||
1076 | /// Parse a bracket expression and return it. | ||||||
1077 | /// NOTE: This assumes the leading '[' has already been consumed. | ||||||
1078 | /// | ||||||
1079 | /// bracketexpr ::= expr] | ||||||
1080 | /// | ||||||
1081 | bool AsmParser::parseBracketExpr(const MCExpr *&Res, SMLoc &EndLoc) { | ||||||
1082 | if (parseExpression(Res)) | ||||||
1083 | return true; | ||||||
1084 | EndLoc = getTok().getEndLoc(); | ||||||
1085 | if (parseToken(AsmToken::RBrac, "expected ']' in brackets expression")) | ||||||
1086 | return true; | ||||||
1087 | return false; | ||||||
1088 | } | ||||||
1089 | |||||||
1090 | /// Parse a primary expression and return it. | ||||||
1091 | /// primaryexpr ::= (parenexpr | ||||||
1092 | /// primaryexpr ::= symbol | ||||||
1093 | /// primaryexpr ::= number | ||||||
1094 | /// primaryexpr ::= '.' | ||||||
1095 | /// primaryexpr ::= ~,+,- primaryexpr | ||||||
1096 | bool AsmParser::parsePrimaryExpr(const MCExpr *&Res, SMLoc &EndLoc, | ||||||
1097 | AsmTypeInfo *TypeInfo) { | ||||||
1098 | SMLoc FirstTokenLoc = getLexer().getLoc(); | ||||||
1099 | AsmToken::TokenKind FirstTokenKind = Lexer.getKind(); | ||||||
1100 | switch (FirstTokenKind) { | ||||||
1101 | default: | ||||||
1102 | return TokError("unknown token in expression"); | ||||||
1103 | // If we have an error assume that we've already handled it. | ||||||
1104 | case AsmToken::Error: | ||||||
1105 | return true; | ||||||
1106 | case AsmToken::Exclaim: | ||||||
1107 | Lex(); // Eat the operator. | ||||||
1108 | if (parsePrimaryExpr(Res, EndLoc, TypeInfo)) | ||||||
1109 | return true; | ||||||
1110 | Res = MCUnaryExpr::createLNot(Res, getContext(), FirstTokenLoc); | ||||||
1111 | return false; | ||||||
1112 | case AsmToken::Dollar: | ||||||
1113 | case AsmToken::At: | ||||||
1114 | case AsmToken::String: | ||||||
1115 | case AsmToken::Identifier: { | ||||||
1116 | StringRef Identifier; | ||||||
1117 | if (parseIdentifier(Identifier)) { | ||||||
1118 | // We may have failed but $ may be a valid token. | ||||||
1119 | if (getTok().is(AsmToken::Dollar)) { | ||||||
1120 | if (Lexer.getMAI().getDollarIsPC()) { | ||||||
1121 | Lex(); | ||||||
1122 | // This is a '$' reference, which references the current PC. Emit a | ||||||
1123 | // temporary label to the streamer and refer to it. | ||||||
1124 | MCSymbol *Sym = Ctx.createTempSymbol(); | ||||||
1125 | Out.emitLabel(Sym); | ||||||
1126 | Res = MCSymbolRefExpr::create(Sym, MCSymbolRefExpr::VK_None, | ||||||
1127 | getContext()); | ||||||
1128 | EndLoc = FirstTokenLoc; | ||||||
1129 | return false; | ||||||
1130 | } | ||||||
1131 | return Error(FirstTokenLoc, "invalid token in expression"); | ||||||
1132 | } | ||||||
1133 | } | ||||||
1134 | // Parse symbol variant | ||||||
1135 | std::pair<StringRef, StringRef> Split; | ||||||
1136 | if (!MAI.useParensForSymbolVariant()) { | ||||||
1137 | if (FirstTokenKind == AsmToken::String) { | ||||||
1138 | if (Lexer.is(AsmToken::At)) { | ||||||
1139 | Lex(); // eat @ | ||||||
1140 | SMLoc AtLoc = getLexer().getLoc(); | ||||||
1141 | StringRef VName; | ||||||
1142 | if (parseIdentifier(VName)) | ||||||
1143 | return Error(AtLoc, "expected symbol variant after '@'"); | ||||||
1144 | |||||||
1145 | Split = std::make_pair(Identifier, VName); | ||||||
1146 | } | ||||||
1147 | } else { | ||||||
1148 | Split = Identifier.split('@'); | ||||||
1149 | } | ||||||
1150 | } else if (Lexer.is(AsmToken::LParen)) { | ||||||
1151 | Lex(); // eat '('. | ||||||
1152 | StringRef VName; | ||||||
1153 | parseIdentifier(VName); | ||||||
1154 | // eat ')'. | ||||||
1155 | if (parseToken(AsmToken::RParen, | ||||||
1156 | "unexpected token in variant, expected ')'")) | ||||||
1157 | return true; | ||||||
1158 | Split = std::make_pair(Identifier, VName); | ||||||
1159 | } | ||||||
1160 | |||||||
1161 | EndLoc = SMLoc::getFromPointer(Identifier.end()); | ||||||
1162 | |||||||
1163 | // This is a symbol reference. | ||||||
1164 | StringRef SymbolName = Identifier; | ||||||
1165 | if (SymbolName.empty()) | ||||||
1166 | return Error(getLexer().getLoc(), "expected a symbol reference"); | ||||||
1167 | |||||||
1168 | MCSymbolRefExpr::VariantKind Variant = MCSymbolRefExpr::VK_None; | ||||||
1169 | |||||||
1170 | // Lookup the symbol variant if used. | ||||||
1171 | if (!Split.second.empty()) { | ||||||
1172 | Variant = MCSymbolRefExpr::getVariantKindForName(Split.second); | ||||||
1173 | if (Variant != MCSymbolRefExpr::VK_Invalid) { | ||||||
1174 | SymbolName = Split.first; | ||||||
1175 | } else if (MAI.doesAllowAtInName() && !MAI.useParensForSymbolVariant()) { | ||||||
1176 | Variant = MCSymbolRefExpr::VK_None; | ||||||
1177 | } else { | ||||||
1178 | return Error(SMLoc::getFromPointer(Split.second.begin()), | ||||||
1179 | "invalid variant '" + Split.second + "'"); | ||||||
1180 | } | ||||||
1181 | } | ||||||
1182 | |||||||
1183 | MCSymbol *Sym = getContext().getInlineAsmLabel(SymbolName); | ||||||
1184 | if (!Sym) | ||||||
1185 | Sym = getContext().getOrCreateSymbol(SymbolName); | ||||||
1186 | |||||||
1187 | // If this is an absolute variable reference, substitute it now to preserve | ||||||
1188 | // semantics in the face of reassignment. | ||||||
1189 | if (Sym->isVariable()) { | ||||||
1190 | auto V = Sym->getVariableValue(/*SetUsed*/ false); | ||||||
1191 | bool DoInline = isa<MCConstantExpr>(V) && !Variant; | ||||||
1192 | if (auto TV = dyn_cast<MCTargetExpr>(V)) | ||||||
1193 | DoInline = TV->inlineAssignedExpr(); | ||||||
1194 | if (DoInline) { | ||||||
1195 | if (Variant) | ||||||
1196 | return Error(EndLoc, "unexpected modifier on variable reference"); | ||||||
1197 | Res = Sym->getVariableValue(/*SetUsed*/ false); | ||||||
1198 | return false; | ||||||
1199 | } | ||||||
1200 | } | ||||||
1201 | |||||||
1202 | // Otherwise create a symbol ref. | ||||||
1203 | Res = MCSymbolRefExpr::create(Sym, Variant, getContext(), FirstTokenLoc); | ||||||
1204 | return false; | ||||||
1205 | } | ||||||
1206 | case AsmToken::BigNum: | ||||||
1207 | return TokError("literal value out of range for directive"); | ||||||
1208 | case AsmToken::Integer: { | ||||||
1209 | SMLoc Loc = getTok().getLoc(); | ||||||
1210 | int64_t IntVal = getTok().getIntVal(); | ||||||
1211 | Res = MCConstantExpr::create(IntVal, getContext()); | ||||||
1212 | EndLoc = Lexer.getTok().getEndLoc(); | ||||||
1213 | Lex(); // Eat token. | ||||||
1214 | // Look for 'b' or 'f' following an Integer as a directional label | ||||||
1215 | if (Lexer.getKind() == AsmToken::Identifier) { | ||||||
1216 | StringRef IDVal = getTok().getString(); | ||||||
1217 | // Lookup the symbol variant if used. | ||||||
1218 | std::pair<StringRef, StringRef> Split = IDVal.split('@'); | ||||||
1219 | MCSymbolRefExpr::VariantKind Variant = MCSymbolRefExpr::VK_None; | ||||||
1220 | if (Split.first.size() != IDVal.size()) { | ||||||
1221 | Variant = MCSymbolRefExpr::getVariantKindForName(Split.second); | ||||||
1222 | if (Variant == MCSymbolRefExpr::VK_Invalid) | ||||||
1223 | return TokError("invalid variant '" + Split.second + "'"); | ||||||
1224 | IDVal = Split.first; | ||||||
1225 | } | ||||||
1226 | if (IDVal == "f" || IDVal == "b") { | ||||||
1227 | MCSymbol *Sym = | ||||||
1228 | Ctx.getDirectionalLocalSymbol(IntVal, IDVal == "b"); | ||||||
1229 | Res = MCSymbolRefExpr::create(Sym, Variant, getContext()); | ||||||
1230 | if (IDVal == "b" && Sym->isUndefined()) | ||||||
1231 | return Error(Loc, "directional label undefined"); | ||||||
1232 | DirLabels.push_back(std::make_tuple(Loc, CppHashInfo, Sym)); | ||||||
1233 | EndLoc = Lexer.getTok().getEndLoc(); | ||||||
1234 | Lex(); // Eat identifier. | ||||||
1235 | } | ||||||
1236 | } | ||||||
1237 | return false; | ||||||
1238 | } | ||||||
1239 | case AsmToken::Real: { | ||||||
1240 | APFloat RealVal(APFloat::IEEEdouble(), getTok().getString()); | ||||||
1241 | uint64_t IntVal = RealVal.bitcastToAPInt().getZExtValue(); | ||||||
1242 | Res = MCConstantExpr::create(IntVal, getContext()); | ||||||
1243 | EndLoc = Lexer.getTok().getEndLoc(); | ||||||
1244 | Lex(); // Eat token. | ||||||
1245 | return false; | ||||||
1246 | } | ||||||
1247 | case AsmToken::Dot: { | ||||||
1248 | // This is a '.' reference, which references the current PC. Emit a | ||||||
1249 | // temporary label to the streamer and refer to it. | ||||||
1250 | MCSymbol *Sym = Ctx.createTempSymbol(); | ||||||
1251 | Out.emitLabel(Sym); | ||||||
1252 | Res = MCSymbolRefExpr::create(Sym, MCSymbolRefExpr::VK_None, getContext()); | ||||||
1253 | EndLoc = Lexer.getTok().getEndLoc(); | ||||||
1254 | Lex(); // Eat identifier. | ||||||
1255 | return false; | ||||||
1256 | } | ||||||
1257 | case AsmToken::LParen: | ||||||
1258 | Lex(); // Eat the '('. | ||||||
1259 | return parseParenExpr(Res, EndLoc); | ||||||
1260 | case AsmToken::LBrac: | ||||||
1261 | if (!PlatformParser->HasBracketExpressions()) | ||||||
1262 | return TokError("brackets expression not supported on this target"); | ||||||
1263 | Lex(); // Eat the '['. | ||||||
1264 | return parseBracketExpr(Res, EndLoc); | ||||||
1265 | case AsmToken::Minus: | ||||||
1266 | Lex(); // Eat the operator. | ||||||
1267 | if (parsePrimaryExpr(Res, EndLoc, TypeInfo)) | ||||||
1268 | return true; | ||||||
1269 | Res = MCUnaryExpr::createMinus(Res, getContext(), FirstTokenLoc); | ||||||
1270 | return false; | ||||||
1271 | case AsmToken::Plus: | ||||||
1272 | Lex(); // Eat the operator. | ||||||
1273 | if (parsePrimaryExpr(Res, EndLoc, TypeInfo)) | ||||||
1274 | return true; | ||||||
1275 | Res = MCUnaryExpr::createPlus(Res, getContext(), FirstTokenLoc); | ||||||
1276 | return false; | ||||||
1277 | case AsmToken::Tilde: | ||||||
1278 | Lex(); // Eat the operator. | ||||||
1279 | if (parsePrimaryExpr(Res, EndLoc, TypeInfo)) | ||||||
1280 | return true; | ||||||
1281 | Res = MCUnaryExpr::createNot(Res, getContext(), FirstTokenLoc); | ||||||
1282 | return false; | ||||||
1283 | // MIPS unary expression operators. The lexer won't generate these tokens if | ||||||
1284 | // MCAsmInfo::HasMipsExpressions is false for the target. | ||||||
1285 | case AsmToken::PercentCall16: | ||||||
1286 | case AsmToken::PercentCall_Hi: | ||||||
1287 | case AsmToken::PercentCall_Lo: | ||||||
1288 | case AsmToken::PercentDtprel_Hi: | ||||||
1289 | case AsmToken::PercentDtprel_Lo: | ||||||
1290 | case AsmToken::PercentGot: | ||||||
1291 | case AsmToken::PercentGot_Disp: | ||||||
1292 | case AsmToken::PercentGot_Hi: | ||||||
1293 | case AsmToken::PercentGot_Lo: | ||||||
1294 | case AsmToken::PercentGot_Ofst: | ||||||
1295 | case AsmToken::PercentGot_Page: | ||||||
1296 | case AsmToken::PercentGottprel: | ||||||
1297 | case AsmToken::PercentGp_Rel: | ||||||
1298 | case AsmToken::PercentHi: | ||||||
1299 | case AsmToken::PercentHigher: | ||||||
1300 | case AsmToken::PercentHighest: | ||||||
1301 | case AsmToken::PercentLo: | ||||||
1302 | case AsmToken::PercentNeg: | ||||||
1303 | case AsmToken::PercentPcrel_Hi: | ||||||
1304 | case AsmToken::PercentPcrel_Lo: | ||||||
1305 | case AsmToken::PercentTlsgd: | ||||||
1306 | case AsmToken::PercentTlsldm: | ||||||
1307 | case AsmToken::PercentTprel_Hi: | ||||||
1308 | case AsmToken::PercentTprel_Lo: | ||||||
1309 | Lex(); // Eat the operator. | ||||||
1310 | if (Lexer.isNot(AsmToken::LParen)) | ||||||
1311 | return TokError("expected '(' after operator"); | ||||||
1312 | Lex(); // Eat the operator. | ||||||
1313 | if (parseExpression(Res, EndLoc)) | ||||||
1314 | return true; | ||||||
1315 | if (Lexer.isNot(AsmToken::RParen)) | ||||||
1316 | return TokError("expected ')'"); | ||||||
1317 | Lex(); // Eat the operator. | ||||||
1318 | Res = getTargetParser().createTargetUnaryExpr(Res, FirstTokenKind, Ctx); | ||||||
1319 | return !Res; | ||||||
1320 | } | ||||||
1321 | } | ||||||
1322 | |||||||
1323 | bool AsmParser::parseExpression(const MCExpr *&Res) { | ||||||
1324 | SMLoc EndLoc; | ||||||
1325 | return parseExpression(Res, EndLoc); | ||||||
1326 | } | ||||||
1327 | |||||||
1328 | const MCExpr * | ||||||
1329 | AsmParser::applyModifierToExpr(const MCExpr *E, | ||||||
1330 | MCSymbolRefExpr::VariantKind Variant) { | ||||||
1331 | // Ask the target implementation about this expression first. | ||||||
1332 | const MCExpr *NewE = getTargetParser().applyModifierToExpr(E, Variant, Ctx); | ||||||
1333 | if (NewE) | ||||||
1334 | return NewE; | ||||||
1335 | // Recurse over the given expression, rebuilding it to apply the given variant | ||||||
1336 | // if there is exactly one symbol. | ||||||
1337 | switch (E->getKind()) { | ||||||
1338 | case MCExpr::Target: | ||||||
1339 | case MCExpr::Constant: | ||||||
1340 | return nullptr; | ||||||
1341 | |||||||
1342 | case MCExpr::SymbolRef: { | ||||||
1343 | const MCSymbolRefExpr *SRE = cast<MCSymbolRefExpr>(E); | ||||||
1344 | |||||||
1345 | if (SRE->getKind() != MCSymbolRefExpr::VK_None) { | ||||||
1346 | TokError("invalid variant on expression '" + getTok().getIdentifier() + | ||||||
1347 | "' (already modified)"); | ||||||
1348 | return E; | ||||||
1349 | } | ||||||
1350 | |||||||
1351 | return MCSymbolRefExpr::create(&SRE->getSymbol(), Variant, getContext()); | ||||||
1352 | } | ||||||
1353 | |||||||
1354 | case MCExpr::Unary: { | ||||||
1355 | const MCUnaryExpr *UE = cast<MCUnaryExpr>(E); | ||||||
1356 | const MCExpr *Sub = applyModifierToExpr(UE->getSubExpr(), Variant); | ||||||
1357 | if (!Sub) | ||||||
1358 | return nullptr; | ||||||
1359 | return MCUnaryExpr::create(UE->getOpcode(), Sub, getContext()); | ||||||
1360 | } | ||||||
1361 | |||||||
1362 | case MCExpr::Binary: { | ||||||
1363 | const MCBinaryExpr *BE = cast<MCBinaryExpr>(E); | ||||||
1364 | const MCExpr *LHS = applyModifierToExpr(BE->getLHS(), Variant); | ||||||
1365 | const MCExpr *RHS = applyModifierToExpr(BE->getRHS(), Variant); | ||||||
1366 | |||||||
1367 | if (!LHS && !RHS) | ||||||
1368 | return nullptr; | ||||||
1369 | |||||||
1370 | if (!LHS) | ||||||
1371 | LHS = BE->getLHS(); | ||||||
1372 | if (!RHS) | ||||||
1373 | RHS = BE->getRHS(); | ||||||
1374 | |||||||
1375 | return MCBinaryExpr::create(BE->getOpcode(), LHS, RHS, getContext()); | ||||||
1376 | } | ||||||
1377 | } | ||||||
1378 | |||||||
1379 | llvm_unreachable("Invalid expression kind!")::llvm::llvm_unreachable_internal("Invalid expression kind!", "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/llvm/lib/MC/MCParser/AsmParser.cpp" , 1379); | ||||||
1380 | } | ||||||
1381 | |||||||
1382 | /// This function checks if the next token is <string> type or arithmetic. | ||||||
1383 | /// string that begin with character '<' must end with character '>'. | ||||||
1384 | /// otherwise it is arithmetics. | ||||||
1385 | /// If the function returns a 'true' value, | ||||||
1386 | /// the End argument will be filled with the last location pointed to the '>' | ||||||
1387 | /// character. | ||||||
1388 | |||||||
1389 | /// There is a gap between the AltMacro's documentation and the single quote | ||||||
1390 | /// implementation. GCC does not fully support this feature and so we will not | ||||||
1391 | /// support it. | ||||||
1392 | /// TODO: Adding single quote as a string. | ||||||
1393 | static bool isAngleBracketString(SMLoc &StrLoc, SMLoc &EndLoc) { | ||||||
1394 | 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~++20210405022414+5f57793c4fe4/llvm/lib/MC/MCParser/AsmParser.cpp" , 1395, __PRETTY_FUNCTION__)) | ||||||
1395 | "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~++20210405022414+5f57793c4fe4/llvm/lib/MC/MCParser/AsmParser.cpp" , 1395, __PRETTY_FUNCTION__)); | ||||||
1396 | const char *CharPtr = StrLoc.getPointer(); | ||||||
1397 | while ((*CharPtr != '>') && (*CharPtr != '\n') && (*CharPtr != '\r') && | ||||||
1398 | (*CharPtr != '\0')) { | ||||||
1399 | if (*CharPtr == '!') | ||||||
1400 | CharPtr++; | ||||||
1401 | CharPtr++; | ||||||
1402 | } | ||||||
1403 | if (*CharPtr == '>') { | ||||||
1404 | EndLoc = StrLoc.getFromPointer(CharPtr + 1); | ||||||
1405 | return true; | ||||||
1406 | } | ||||||
1407 | return false; | ||||||
1408 | } | ||||||
1409 | |||||||
1410 | /// creating a string without the escape characters '!'. | ||||||
1411 | static std::string angleBracketString(StringRef AltMacroStr) { | ||||||
1412 | std::string Res; | ||||||
1413 | for (size_t Pos = 0; Pos < AltMacroStr.size(); Pos++) { | ||||||
1414 | if (AltMacroStr[Pos] == '!') | ||||||
1415 | Pos++; | ||||||
1416 | Res += AltMacroStr[Pos]; | ||||||
1417 | } | ||||||
1418 | return Res; | ||||||
1419 | } | ||||||
1420 | |||||||
1421 | /// Parse an expression and return it. | ||||||
1422 | /// | ||||||
1423 | /// expr ::= expr &&,|| expr -> lowest. | ||||||
1424 | /// expr ::= expr |,^,&,! expr | ||||||
1425 | /// expr ::= expr ==,!=,<>,<,<=,>,>= expr | ||||||
1426 | /// expr ::= expr <<,>> expr | ||||||
1427 | /// expr ::= expr +,- expr | ||||||
1428 | /// expr ::= expr *,/,% expr -> highest. | ||||||
1429 | /// expr ::= primaryexpr | ||||||
1430 | /// | ||||||
1431 | bool AsmParser::parseExpression(const MCExpr *&Res, SMLoc &EndLoc) { | ||||||
1432 | // Parse the expression. | ||||||
1433 | Res = nullptr; | ||||||
1434 | if (getTargetParser().parsePrimaryExpr(Res, EndLoc) || | ||||||
1435 | parseBinOpRHS(1, Res, EndLoc)) | ||||||
1436 | return true; | ||||||
1437 | |||||||
1438 | // As a special case, we support 'a op b @ modifier' by rewriting the | ||||||
1439 | // expression to include the modifier. This is inefficient, but in general we | ||||||
1440 | // expect users to use 'a@modifier op b'. | ||||||
1441 | if (Lexer.getKind() == AsmToken::At) { | ||||||
1442 | Lex(); | ||||||
1443 | |||||||
1444 | if (Lexer.isNot(AsmToken::Identifier)) | ||||||
1445 | return TokError("unexpected symbol modifier following '@'"); | ||||||
1446 | |||||||
1447 | MCSymbolRefExpr::VariantKind Variant = | ||||||
1448 | MCSymbolRefExpr::getVariantKindForName(getTok().getIdentifier()); | ||||||
1449 | if (Variant == MCSymbolRefExpr::VK_Invalid) | ||||||
1450 | return TokError("invalid variant '" + getTok().getIdentifier() + "'"); | ||||||
1451 | |||||||
1452 | const MCExpr *ModifiedRes = applyModifierToExpr(Res, Variant); | ||||||
1453 | if (!ModifiedRes) { | ||||||
1454 | return TokError("invalid modifier '" + getTok().getIdentifier() + | ||||||
1455 | "' (no symbols present)"); | ||||||
1456 | } | ||||||
1457 | |||||||
1458 | Res = ModifiedRes; | ||||||
1459 | Lex(); | ||||||
1460 | } | ||||||
1461 | |||||||
1462 | // Try to constant fold it up front, if possible. Do not exploit | ||||||
1463 | // assembler here. | ||||||
1464 | int64_t Value; | ||||||
1465 | if (Res->evaluateAsAbsolute(Value)) | ||||||
1466 | Res = MCConstantExpr::create(Value, getContext()); | ||||||
1467 | |||||||
1468 | return false; | ||||||
1469 | } | ||||||
1470 | |||||||
1471 | bool AsmParser::parseParenExpression(const MCExpr *&Res, SMLoc &EndLoc) { | ||||||
1472 | Res = nullptr; | ||||||
1473 | return parseParenExpr(Res, EndLoc) || parseBinOpRHS(1, Res, EndLoc); | ||||||
1474 | } | ||||||
1475 | |||||||
1476 | bool AsmParser::parseParenExprOfDepth(unsigned ParenDepth, const MCExpr *&Res, | ||||||
1477 | SMLoc &EndLoc) { | ||||||
1478 | if (parseParenExpr(Res, EndLoc)) | ||||||
1479 | return true; | ||||||
1480 | |||||||
1481 | for (; ParenDepth > 0; --ParenDepth) { | ||||||
1482 | if (parseBinOpRHS(1, Res, EndLoc)) | ||||||
1483 | return true; | ||||||
1484 | |||||||
1485 | // We don't Lex() the last RParen. | ||||||
1486 | // This is the same behavior as parseParenExpression(). | ||||||
1487 | if (ParenDepth - 1 > 0) { | ||||||
1488 | EndLoc = getTok().getEndLoc(); | ||||||
1489 | if (parseToken(AsmToken::RParen, | ||||||
1490 | "expected ')' in parentheses expression")) | ||||||
1491 | return true; | ||||||
1492 | } | ||||||
1493 | } | ||||||
1494 | return false; | ||||||
1495 | } | ||||||
1496 | |||||||
1497 | bool AsmParser::parseAbsoluteExpression(int64_t &Res) { | ||||||
1498 | const MCExpr *Expr; | ||||||
1499 | |||||||
1500 | SMLoc StartLoc = Lexer.getLoc(); | ||||||
1501 | if (parseExpression(Expr)) | ||||||
1502 | return true; | ||||||
1503 | |||||||
1504 | if (!Expr->evaluateAsAbsolute(Res, getStreamer().getAssemblerPtr())) | ||||||
1505 | return Error(StartLoc, "expected absolute expression"); | ||||||
1506 | |||||||
1507 | return false; | ||||||
1508 | } | ||||||
1509 | |||||||
1510 | static unsigned getDarwinBinOpPrecedence(AsmToken::TokenKind K, | ||||||
1511 | MCBinaryExpr::Opcode &Kind, | ||||||
1512 | bool ShouldUseLogicalShr) { | ||||||
1513 | switch (K) { | ||||||
1514 | default: | ||||||
1515 | return 0; // not a binop. | ||||||
1516 | |||||||
1517 | // Lowest Precedence: &&, || | ||||||
1518 | case AsmToken::AmpAmp: | ||||||
1519 | Kind = MCBinaryExpr::LAnd; | ||||||
1520 | return 1; | ||||||
1521 | case AsmToken::PipePipe: | ||||||
1522 | Kind = MCBinaryExpr::LOr; | ||||||
1523 | return 1; | ||||||
1524 | |||||||
1525 | // Low Precedence: |, &, ^ | ||||||
1526 | case AsmToken::Pipe: | ||||||
1527 | Kind = MCBinaryExpr::Or; | ||||||
1528 | return 2; | ||||||
1529 | case AsmToken::Caret: | ||||||
1530 | Kind = MCBinaryExpr::Xor; | ||||||
1531 | return 2; | ||||||
1532 | case AsmToken::Amp: | ||||||
1533 | Kind = MCBinaryExpr::And; | ||||||
1534 | return 2; | ||||||
1535 | |||||||
1536 | // Low Intermediate Precedence: ==, !=, <>, <, <=, >, >= | ||||||
1537 | case AsmToken::EqualEqual: | ||||||
1538 | Kind = MCBinaryExpr::EQ; | ||||||
1539 | return 3; | ||||||
1540 | case AsmToken::ExclaimEqual: | ||||||
1541 | case AsmToken::LessGreater: | ||||||
1542 | Kind = MCBinaryExpr::NE; | ||||||
1543 | return 3; | ||||||
1544 | case AsmToken::Less: | ||||||
1545 | Kind = MCBinaryExpr::LT; | ||||||
1546 | return 3; | ||||||
1547 | case AsmToken::LessEqual: | ||||||
1548 | Kind = MCBinaryExpr::LTE; | ||||||
1549 | return 3; | ||||||
1550 | case AsmToken::Greater: | ||||||
1551 | Kind = MCBinaryExpr::GT; | ||||||
1552 | return 3; | ||||||
1553 | case AsmToken::GreaterEqual: | ||||||
1554 | Kind = MCBinaryExpr::GTE; | ||||||
1555 | return 3; | ||||||
1556 | |||||||
1557 | // Intermediate Precedence: <<, >> | ||||||
1558 | case AsmToken::LessLess: | ||||||
1559 | Kind = MCBinaryExpr::Shl; | ||||||
1560 | return 4; | ||||||
1561 | case AsmToken::GreaterGreater: | ||||||
1562 | Kind = ShouldUseLogicalShr ? MCBinaryExpr::LShr : MCBinaryExpr::AShr; | ||||||
1563 | return 4; | ||||||
1564 | |||||||
1565 | // High Intermediate Precedence: +, - | ||||||
1566 | case AsmToken::Plus: | ||||||
1567 | Kind = MCBinaryExpr::Add; | ||||||
1568 | return 5; | ||||||
1569 | case AsmToken::Minus: | ||||||
1570 | Kind = MCBinaryExpr::Sub; | ||||||
1571 | return 5; | ||||||
1572 | |||||||
1573 | // Highest Precedence: *, /, % | ||||||
1574 | case AsmToken::Star: | ||||||
1575 | Kind = MCBinaryExpr::Mul; | ||||||
1576 | return 6; | ||||||
1577 | case AsmToken::Slash: | ||||||
1578 | Kind = MCBinaryExpr::Div; | ||||||
1579 | return 6; | ||||||
1580 | case AsmToken::Percent: | ||||||
1581 | Kind = MCBinaryExpr::Mod; | ||||||
1582 | return 6; | ||||||
1583 | } | ||||||
1584 | } | ||||||
1585 | |||||||
1586 | static unsigned getGNUBinOpPrecedence(const MCAsmInfo &MAI, | ||||||
1587 | AsmToken::TokenKind K, | ||||||
1588 | MCBinaryExpr::Opcode &Kind, | ||||||
1589 | bool ShouldUseLogicalShr) { | ||||||
1590 | switch (K) { | ||||||
1591 | default: | ||||||
1592 | return 0; // not a binop. | ||||||
1593 | |||||||
1594 | // Lowest Precedence: &&, || | ||||||
1595 | case AsmToken::AmpAmp: | ||||||
1596 | Kind = MCBinaryExpr::LAnd; | ||||||
1597 | return 2; | ||||||
1598 | case AsmToken::PipePipe: | ||||||
1599 | Kind = MCBinaryExpr::LOr; | ||||||
1600 | return 1; | ||||||
1601 | |||||||
1602 | // Low Precedence: ==, !=, <>, <, <=, >, >= | ||||||
1603 | case AsmToken::EqualEqual: | ||||||
1604 | Kind = MCBinaryExpr::EQ; | ||||||
1605 | return 3; | ||||||
1606 | case AsmToken::ExclaimEqual: | ||||||
1607 | case AsmToken::LessGreater: | ||||||
1608 | Kind = MCBinaryExpr::NE; | ||||||
1609 | return 3; | ||||||
1610 | case AsmToken::Less: | ||||||
1611 | Kind = MCBinaryExpr::LT; | ||||||
1612 | return 3; | ||||||
1613 | case AsmToken::LessEqual: | ||||||
1614 | Kind = MCBinaryExpr::LTE; | ||||||
1615 | return 3; | ||||||
1616 | case AsmToken::Greater: | ||||||
1617 | Kind = MCBinaryExpr::GT; | ||||||
1618 | return 3; | ||||||
1619 | case AsmToken::GreaterEqual: | ||||||
1620 | Kind = MCBinaryExpr::GTE; | ||||||
1621 | return 3; | ||||||
1622 | |||||||
1623 | // Low Intermediate Precedence: +, - | ||||||
1624 | case AsmToken::Plus: | ||||||
1625 | Kind = MCBinaryExpr::Add; | ||||||
1626 | return 4; | ||||||
1627 | case AsmToken::Minus: | ||||||
1628 | Kind = MCBinaryExpr::Sub; | ||||||
1629 | return 4; | ||||||
1630 | |||||||
1631 | // High Intermediate Precedence: |, !, &, ^ | ||||||
1632 | // | ||||||
1633 | case AsmToken::Pipe: | ||||||
1634 | Kind = MCBinaryExpr::Or; | ||||||
1635 | return 5; | ||||||
1636 | case AsmToken::Exclaim: | ||||||
1637 | // Hack to support ARM compatible aliases (implied 'sp' operand in 'srs*' | ||||||
1638 | // instructions like 'srsda #31!') and not parse ! as an infix operator. | ||||||
1639 | if (MAI.getCommentString() == "@") | ||||||
1640 | return 0; | ||||||
1641 | Kind = MCBinaryExpr::OrNot; | ||||||
1642 | return 5; | ||||||
1643 | case AsmToken::Caret: | ||||||
1644 | Kind = MCBinaryExpr::Xor; | ||||||
1645 | return 5; | ||||||
1646 | case AsmToken::Amp: | ||||||
1647 | Kind = MCBinaryExpr::And; | ||||||
1648 | return 5; | ||||||
1649 | |||||||
1650 | // Highest Precedence: *, /, %, <<, >> | ||||||
1651 | case AsmToken::Star: | ||||||
1652 | Kind = MCBinaryExpr::Mul; | ||||||
1653 | return 6; | ||||||
1654 | case AsmToken::Slash: | ||||||
1655 | Kind = MCBinaryExpr::Div; | ||||||
1656 | return 6; | ||||||
1657 | case AsmToken::Percent: | ||||||
1658 | Kind = MCBinaryExpr::Mod; | ||||||
1659 | return 6; | ||||||
1660 | case AsmToken::LessLess: | ||||||
1661 | Kind = MCBinaryExpr::Shl; | ||||||
1662 | return 6; | ||||||
1663 | case AsmToken::GreaterGreater: | ||||||
1664 | Kind = ShouldUseLogicalShr ? MCBinaryExpr::LShr : MCBinaryExpr::AShr; | ||||||
1665 | return 6; | ||||||
1666 | } | ||||||
1667 | } | ||||||
1668 | |||||||
1669 | unsigned AsmParser::getBinOpPrecedence(AsmToken::TokenKind K, | ||||||
1670 | MCBinaryExpr::Opcode &Kind) { | ||||||
1671 | bool ShouldUseLogicalShr = MAI.shouldUseLogicalShr(); | ||||||
1672 | return IsDarwin ? getDarwinBinOpPrecedence(K, Kind, ShouldUseLogicalShr) | ||||||
1673 | : getGNUBinOpPrecedence(MAI, K, Kind, ShouldUseLogicalShr); | ||||||
1674 | } | ||||||
1675 | |||||||
1676 | /// Parse all binary operators with precedence >= 'Precedence'. | ||||||
1677 | /// Res contains the LHS of the expression on input. | ||||||
1678 | bool AsmParser::parseBinOpRHS(unsigned Precedence, const MCExpr *&Res, | ||||||
1679 | SMLoc &EndLoc) { | ||||||
1680 | SMLoc StartLoc = Lexer.getLoc(); | ||||||
1681 | while (true) { | ||||||
1682 | MCBinaryExpr::Opcode Kind = MCBinaryExpr::Add; | ||||||
1683 | unsigned TokPrec = getBinOpPrecedence(Lexer.getKind(), Kind); | ||||||
1684 | |||||||
1685 | // If the next token is lower precedence than we are allowed to eat, return | ||||||
1686 | // successfully with what we ate already. | ||||||
1687 | if (TokPrec < Precedence) | ||||||
1688 | return false; | ||||||
1689 | |||||||
1690 | Lex(); | ||||||
1691 | |||||||
1692 | // Eat the next primary expression. | ||||||
1693 | const MCExpr *RHS; | ||||||
1694 | if (getTargetParser().parsePrimaryExpr(RHS, EndLoc)) | ||||||
1695 | return true; | ||||||
1696 | |||||||
1697 | // If BinOp binds less tightly with RHS than the operator after RHS, let | ||||||
1698 | // the pending operator take RHS as its LHS. | ||||||
1699 | MCBinaryExpr::Opcode Dummy; | ||||||
1700 | unsigned NextTokPrec = getBinOpPrecedence(Lexer.getKind(), Dummy); | ||||||
1701 | if (TokPrec < NextTokPrec && parseBinOpRHS(TokPrec + 1, RHS, EndLoc)) | ||||||
1702 | return true; | ||||||
1703 | |||||||
1704 | // Merge LHS and RHS according to operator. | ||||||
1705 | Res = MCBinaryExpr::create(Kind, Res, RHS, getContext(), StartLoc); | ||||||
1706 | } | ||||||
1707 | } | ||||||
1708 | |||||||
1709 | /// ParseStatement: | ||||||
1710 | /// ::= EndOfStatement | ||||||
1711 | /// ::= Label* Directive ...Operands... EndOfStatement | ||||||
1712 | /// ::= Label* Identifier OperandList* EndOfStatement | ||||||
1713 | bool AsmParser::parseStatement(ParseStatementInfo &Info, | ||||||
1714 | MCAsmParserSemaCallback *SI) { | ||||||
1715 | 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~++20210405022414+5f57793c4fe4/llvm/lib/MC/MCParser/AsmParser.cpp" , 1715, __PRETTY_FUNCTION__)); | ||||||
| |||||||
1716 | // Eat initial spaces and comments | ||||||
1717 | while (Lexer.is(AsmToken::Space)) | ||||||
1718 | Lex(); | ||||||
1719 | if (Lexer.is(AsmToken::EndOfStatement)) { | ||||||
1720 | // if this is a line comment we can drop it safely | ||||||
1721 | if (getTok().getString().empty() || getTok().getString().front() == '\r' || | ||||||
1722 | getTok().getString().front() == '\n') | ||||||
1723 | Out.AddBlankLine(); | ||||||
1724 | Lex(); | ||||||
1725 | return false; | ||||||
1726 | } | ||||||
1727 | // Statements always start with an identifier. | ||||||
1728 | AsmToken ID = getTok(); | ||||||
1729 | SMLoc IDLoc = ID.getLoc(); | ||||||
1730 | StringRef IDVal; | ||||||
1731 | int64_t LocalLabelVal = -1; | ||||||
1732 | StartTokLoc = ID.getLoc(); | ||||||
1733 | if (Lexer.is(AsmToken::HashDirective)) | ||||||
1734 | return parseCppHashLineFilenameComment(IDLoc, | ||||||
1735 | !isInsideMacroInstantiation()); | ||||||
1736 | |||||||
1737 | // Allow an integer followed by a ':' as a directional local label. | ||||||
1738 | if (Lexer.is(AsmToken::Integer)) { | ||||||
1739 | LocalLabelVal = getTok().getIntVal(); | ||||||
1740 | if (LocalLabelVal < 0) { | ||||||
1741 | if (!TheCondState.Ignore) { | ||||||
1742 | Lex(); // always eat a token | ||||||
1743 | return Error(IDLoc, "unexpected token at start of statement"); | ||||||
1744 | } | ||||||
1745 | IDVal = ""; | ||||||
1746 | } else { | ||||||
1747 | IDVal = getTok().getString(); | ||||||
1748 | Lex(); // Consume the integer token to be used as an identifier token. | ||||||
1749 | if (Lexer.getKind() != AsmToken::Colon) { | ||||||
1750 | if (!TheCondState.Ignore) { | ||||||
1751 | Lex(); // always eat a token | ||||||
1752 | return Error(IDLoc, "unexpected token at start of statement"); | ||||||
1753 | } | ||||||
1754 | } | ||||||
1755 | } | ||||||
1756 | } else if (Lexer.is(AsmToken::Dot)) { | ||||||
1757 | // Treat '.' as a valid identifier in this context. | ||||||
1758 | Lex(); | ||||||
1759 | IDVal = "."; | ||||||
1760 | } else if (Lexer.is(AsmToken::LCurly)) { | ||||||
1761 | // Treat '{' as a valid identifier in this context. | ||||||
1762 | Lex(); | ||||||
1763 | IDVal = "{"; | ||||||
1764 | |||||||
1765 | } else if (Lexer.is(AsmToken::RCurly)) { | ||||||
1766 | // Treat '}' as a valid identifier in this context. | ||||||
1767 | Lex(); | ||||||
1768 | IDVal = "}"; | ||||||
1769 | } else if (Lexer.is(AsmToken::Star) && | ||||||
1770 | getTargetParser().starIsStartOfStatement()) { | ||||||
1771 | // Accept '*' as a valid start of statement. | ||||||
1772 | Lex(); | ||||||
1773 | IDVal = "*"; | ||||||
1774 | } else if (parseIdentifier(IDVal)) { | ||||||
1775 | if (!TheCondState.Ignore) { | ||||||
1776 | Lex(); // always eat a token | ||||||
1777 | return Error(IDLoc, "unexpected token at start of statement"); | ||||||
1778 | } | ||||||
1779 | IDVal = ""; | ||||||
1780 | } | ||||||
1781 | |||||||
1782 | // Handle conditional assembly here before checking for skipping. We | ||||||
1783 | // have to do this so that .endif isn't skipped in a ".if 0" block for | ||||||
1784 | // example. | ||||||
1785 | StringMap<DirectiveKind>::const_iterator DirKindIt = | ||||||
1786 | DirectiveKindMap.find(IDVal.lower()); | ||||||
1787 | DirectiveKind DirKind = (DirKindIt == DirectiveKindMap.end()) | ||||||
1788 | ? DK_NO_DIRECTIVE | ||||||
1789 | : DirKindIt->getValue(); | ||||||
1790 | switch (DirKind) { | ||||||
1791 | default: | ||||||
1792 | break; | ||||||
1793 | case DK_IF: | ||||||
1794 | case DK_IFEQ: | ||||||
1795 | case DK_IFGE: | ||||||
1796 | case DK_IFGT: | ||||||
1797 | case DK_IFLE: | ||||||
1798 | case DK_IFLT: | ||||||
1799 | case DK_IFNE: | ||||||
1800 | return parseDirectiveIf(IDLoc, DirKind); | ||||||
1801 | case DK_IFB: | ||||||
1802 | return parseDirectiveIfb(IDLoc, true); | ||||||
1803 | case DK_IFNB: | ||||||
1804 | return parseDirectiveIfb(IDLoc, false); | ||||||
1805 | case DK_IFC: | ||||||
1806 | return parseDirectiveIfc(IDLoc, true); | ||||||
1807 | case DK_IFEQS: | ||||||
1808 | return parseDirectiveIfeqs(IDLoc, true); | ||||||
1809 | case DK_IFNC: | ||||||
1810 | return parseDirectiveIfc(IDLoc, false); | ||||||
1811 | case DK_IFNES: | ||||||
1812 | return parseDirectiveIfeqs(IDLoc, false); | ||||||
1813 | case DK_IFDEF: | ||||||
1814 | return parseDirectiveIfdef(IDLoc, true); | ||||||
1815 | case DK_IFNDEF: | ||||||
1816 | case DK_IFNOTDEF: | ||||||
1817 | return parseDirectiveIfdef(IDLoc, false); | ||||||
1818 | case DK_ELSEIF: | ||||||
1819 | return parseDirectiveElseIf(IDLoc); | ||||||
1820 | case DK_ELSE: | ||||||
1821 | return parseDirectiveElse(IDLoc); | ||||||
1822 | case DK_ENDIF: | ||||||
1823 | return parseDirectiveEndIf(IDLoc); | ||||||
1824 | } | ||||||
1825 | |||||||
1826 | // Ignore the statement if in the middle of inactive conditional | ||||||
1827 | // (e.g. ".if 0"). | ||||||
1828 | if (TheCondState.Ignore) { | ||||||
1829 | eatToEndOfStatement(); | ||||||
1830 | return false; | ||||||
1831 | } | ||||||
1832 | |||||||
1833 | // FIXME: Recurse on local labels? | ||||||
1834 | |||||||
1835 | // See what kind of statement we have. | ||||||
1836 | switch (Lexer.getKind()) { | ||||||
1837 | case AsmToken::Colon: { | ||||||
1838 | if (!getTargetParser().isLabel(ID)) | ||||||
1839 | break; | ||||||
1840 | if (checkForValidSection()) | ||||||
1841 | return true; | ||||||
1842 | |||||||
1843 | // identifier ':' -> Label. | ||||||
1844 | Lex(); | ||||||
1845 | |||||||
1846 | // Diagnose attempt to use '.' as a label. | ||||||
1847 | if (IDVal == ".") | ||||||
1848 | return Error(IDLoc, "invalid use of pseudo-symbol '.' as a label"); | ||||||
1849 | |||||||
1850 | // Diagnose attempt to use a variable as a label. | ||||||
1851 | // | ||||||
1852 | // FIXME: Diagnostics. Note the location of the definition as a label. | ||||||
1853 | // FIXME: This doesn't diagnose assignment to a symbol which has been | ||||||
1854 | // implicitly marked as external. | ||||||
1855 | MCSymbol *Sym; | ||||||
1856 | if (LocalLabelVal == -1) { | ||||||
1857 | if (ParsingMSInlineAsm && SI) { | ||||||
1858 | StringRef RewrittenLabel = | ||||||
1859 | SI->LookupInlineAsmLabel(IDVal, getSourceManager(), IDLoc, true); | ||||||
1860 | 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~++20210405022414+5f57793c4fe4/llvm/lib/MC/MCParser/AsmParser.cpp" , 1861, __PRETTY_FUNCTION__)) | ||||||
1861 | "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~++20210405022414+5f57793c4fe4/llvm/lib/MC/MCParser/AsmParser.cpp" , 1861, __PRETTY_FUNCTION__)); | ||||||
1862 | Info.AsmRewrites->emplace_back(AOK_Label, IDLoc, IDVal.size(), | ||||||
1863 | RewrittenLabel); | ||||||
1864 | IDVal = RewrittenLabel; | ||||||
1865 | } | ||||||
1866 | Sym = getContext().getOrCreateSymbol(IDVal); | ||||||
1867 | } else | ||||||
1868 | Sym = Ctx.createDirectionalLocalSymbol(LocalLabelVal); | ||||||
1869 | // End of Labels should be treated as end of line for lexing | ||||||
1870 | // purposes but that information is not available to the Lexer who | ||||||
1871 | // does not understand Labels. This may cause us to see a Hash | ||||||
1872 | // here instead of a preprocessor line comment. | ||||||
1873 | if (getTok().is(AsmToken::Hash)) { | ||||||
1874 | StringRef CommentStr = parseStringToEndOfStatement(); | ||||||
1875 | Lexer.Lex(); | ||||||
1876 | Lexer.UnLex(AsmToken(AsmToken::EndOfStatement, CommentStr)); | ||||||
1877 | } | ||||||
1878 | |||||||
1879 | // Consume any end of statement token, if present, to avoid spurious | ||||||
1880 | // AddBlankLine calls(). | ||||||
1881 | if (getTok().is(AsmToken::EndOfStatement)) { | ||||||
1882 | Lex(); | ||||||
1883 | } | ||||||
1884 | |||||||
1885 | if (discardLTOSymbol(IDVal)) | ||||||
1886 | return false; | ||||||
1887 | |||||||
1888 | getTargetParser().doBeforeLabelEmit(Sym); | ||||||
1889 | |||||||
1890 | // Emit the label. | ||||||
1891 | if (!getTargetParser().isParsingMSInlineAsm()) | ||||||
1892 | Out.emitLabel(Sym, IDLoc); | ||||||
1893 | |||||||
1894 | // If we are generating dwarf for assembly source files then gather the | ||||||
1895 | // info to make a dwarf label entry for this label if needed. | ||||||
1896 | if (enabledGenDwarfForAssembly()) | ||||||
1897 | MCGenDwarfLabelEntry::Make(Sym, &getStreamer(), getSourceManager(), | ||||||
1898 | IDLoc); | ||||||
1899 | |||||||
1900 | getTargetParser().onLabelParsed(Sym); | ||||||
1901 | |||||||
1902 | return false; | ||||||
1903 | } | ||||||
1904 | |||||||
1905 | case AsmToken::Equal: | ||||||
1906 | if (!getTargetParser().equalIsAsmAssignment()) | ||||||
1907 | break; | ||||||
1908 | // identifier '=' ... -> assignment statement | ||||||
1909 | Lex(); | ||||||
1910 | |||||||
1911 | return parseAssignment(IDVal, true); | ||||||
1912 | |||||||
1913 | default: // Normal instruction or directive. | ||||||
1914 | break; | ||||||
1915 | } | ||||||
1916 | |||||||
1917 | // If macros are enabled, check to see if this is a macro instantiation. | ||||||
1918 | if (areMacrosEnabled()) | ||||||
1919 | if (const MCAsmMacro *M = getContext().lookupMacro(IDVal)) { | ||||||
1920 | return handleMacroEntry(M, IDLoc); | ||||||
1921 | } | ||||||
1922 | |||||||
1923 | // Otherwise, we have a normal instruction or directive. | ||||||
1924 | |||||||
1925 | // Directives start with "." | ||||||
1926 | if (IDVal.startswith(".") && IDVal != ".") { | ||||||
1927 | // There are several entities interested in parsing directives: | ||||||
1928 | // | ||||||
1929 | // 1. The target-specific assembly parser. Some directives are target | ||||||
1930 | // specific or may potentially behave differently on certain targets. | ||||||
1931 | // 2. Asm parser extensions. For example, platform-specific parsers | ||||||
1932 | // (like the ELF parser) register themselves as extensions. | ||||||
1933 | // 3. The generic directive parser implemented by this class. These are | ||||||
1934 | // all the directives that behave in a target and platform independent | ||||||
1935 | // manner, or at least have a default behavior that's shared between | ||||||
1936 | // all targets and platforms. | ||||||
1937 | |||||||
1938 | getTargetParser().flushPendingInstructions(getStreamer()); | ||||||
1939 | |||||||
1940 | SMLoc StartTokLoc = getTok().getLoc(); | ||||||
1941 | bool TPDirectiveReturn = getTargetParser().ParseDirective(ID); | ||||||
1942 | |||||||
1943 | if (hasPendingError()) | ||||||
1944 | return true; | ||||||
1945 | // Currently the return value should be true if we are | ||||||
1946 | // uninterested but as this is at odds with the standard parsing | ||||||
1947 | // convention (return true = error) we have instances of a parsed | ||||||
1948 | // directive that fails returning true as an error. Catch these | ||||||
1949 | // cases as best as possible errors here. | ||||||
1950 | if (TPDirectiveReturn && StartTokLoc != getTok().getLoc()) | ||||||
1951 | return true; | ||||||
1952 | // Return if we did some parsing or believe we succeeded. | ||||||
1953 | if (!TPDirectiveReturn
| ||||||
1954 | return false; | ||||||
1955 | |||||||
1956 | // Next, check the extension directive map to see if any extension has | ||||||
1957 | // registered itself to parse this directive. | ||||||
1958 | std::pair<MCAsmParserExtension *, DirectiveHandler> Handler = | ||||||
1959 | ExtensionDirectiveMap.lookup(IDVal); | ||||||
1960 | if (Handler.first) | ||||||
1961 | return (*Handler.second)(Handler.first, IDVal, IDLoc); | ||||||
1962 | |||||||
1963 | // Finally, if no one else is interested in this directive, it must be | ||||||
1964 | // generic and familiar to this class. | ||||||
1965 | switch (DirKind) { | ||||||
1966 | default: | ||||||
1967 | break; | ||||||
1968 | case DK_SET: | ||||||
1969 | case DK_EQU: | ||||||
1970 | return parseDirectiveSet(IDVal, true); | ||||||
1971 | case DK_EQUIV: | ||||||
1972 | return parseDirectiveSet(IDVal, false); | ||||||
1973 | case DK_ASCII: | ||||||
1974 | return parseDirectiveAscii(IDVal, false); | ||||||
1975 | case DK_ASCIZ: | ||||||
1976 | case DK_STRING: | ||||||
1977 | return parseDirectiveAscii(IDVal, true); | ||||||
1978 | case DK_BYTE: | ||||||
1979 | case DK_DC_B: | ||||||
1980 | return parseDirectiveValue(IDVal, 1); | ||||||
1981 | case DK_DC: | ||||||
1982 | case DK_DC_W: | ||||||
1983 | case DK_SHORT: | ||||||
1984 | case DK_VALUE: | ||||||
1985 | case DK_2BYTE: | ||||||
1986 | return parseDirectiveValue(IDVal, 2); | ||||||
1987 | case DK_LONG: | ||||||
1988 | case DK_INT: | ||||||
1989 | case DK_4BYTE: | ||||||
1990 | case DK_DC_L: | ||||||
1991 | return parseDirectiveValue(IDVal, 4); | ||||||
1992 | case DK_QUAD: | ||||||
1993 | case DK_8BYTE: | ||||||
1994 | return parseDirectiveValue(IDVal, 8); | ||||||
1995 | case DK_DC_A: | ||||||
1996 | return parseDirectiveValue( | ||||||
1997 | IDVal, getContext().getAsmInfo()->getCodePointerSize()); | ||||||
1998 | case DK_OCTA: | ||||||
1999 | return parseDirectiveOctaValue(IDVal); | ||||||
2000 | case DK_SINGLE: | ||||||
2001 | case DK_FLOAT: | ||||||
2002 | case DK_DC_S: | ||||||
2003 | return parseDirectiveRealValue(IDVal, APFloat::IEEEsingle()); | ||||||
2004 | case DK_DOUBLE: | ||||||
2005 | case DK_DC_D: | ||||||
2006 | return parseDirectiveRealValue(IDVal, APFloat::IEEEdouble()); | ||||||
2007 | case DK_ALIGN: { | ||||||
2008 | bool IsPow2 = !getContext().getAsmInfo()->getAlignmentIsInBytes(); | ||||||
2009 | return parseDirectiveAlign(IsPow2, /*ExprSize=*/1); | ||||||
2010 | } | ||||||
2011 | case DK_ALIGN32: { | ||||||
2012 | bool IsPow2 = !getContext().getAsmInfo()->getAlignmentIsInBytes(); | ||||||
2013 | return parseDirectiveAlign(IsPow2, /*ExprSize=*/4); | ||||||
2014 | } | ||||||
2015 | case DK_BALIGN: | ||||||
2016 | return parseDirectiveAlign(/*IsPow2=*/false, /*ExprSize=*/1); | ||||||
2017 | case DK_BALIGNW: | ||||||
2018 | return parseDirectiveAlign(/*IsPow2=*/false, /*ExprSize=*/2); | ||||||
2019 | case DK_BALIGNL: | ||||||
2020 | return parseDirectiveAlign(/*IsPow2=*/false, /*ExprSize=*/4); | ||||||
2021 | case DK_P2ALIGN: | ||||||
2022 | return parseDirectiveAlign(/*IsPow2=*/true, /*ExprSize=*/1); | ||||||
2023 | case DK_P2ALIGNW: | ||||||
2024 | return parseDirectiveAlign(/*IsPow2=*/true, /*ExprSize=*/2); | ||||||
2025 | case DK_P2ALIGNL: | ||||||
2026 | return parseDirectiveAlign(/*IsPow2=*/true, /*ExprSize=*/4); | ||||||
2027 | case DK_ORG: | ||||||
2028 | return parseDirectiveOrg(); | ||||||
2029 | case DK_FILL: | ||||||
2030 | return parseDirectiveFill(); | ||||||
2031 | case DK_ZERO: | ||||||
2032 | return parseDirectiveZero(); | ||||||
2033 | case DK_EXTERN: | ||||||
2034 | eatToEndOfStatement(); // .extern is the default, ignore it. | ||||||
2035 | return false; | ||||||
2036 | case DK_GLOBL: | ||||||
2037 | case DK_GLOBAL: | ||||||
2038 | return parseDirectiveSymbolAttribute(MCSA_Global); | ||||||
2039 | case DK_LAZY_REFERENCE: | ||||||
2040 | return parseDirectiveSymbolAttribute(MCSA_LazyReference); | ||||||
2041 | case DK_NO_DEAD_STRIP: | ||||||
2042 | return parseDirectiveSymbolAttribute(MCSA_NoDeadStrip); | ||||||
2043 | case DK_SYMBOL_RESOLVER: | ||||||
2044 | return parseDirectiveSymbolAttribute(MCSA_SymbolResolver); | ||||||
2045 | case DK_PRIVATE_EXTERN: | ||||||
2046 | return parseDirectiveSymbolAttribute(MCSA_PrivateExtern); | ||||||
2047 | case DK_REFERENCE: | ||||||
2048 | return parseDirectiveSymbolAttribute(MCSA_Reference); | ||||||
2049 | case DK_WEAK_DEFINITION: | ||||||
2050 | return parseDirectiveSymbolAttribute(MCSA_WeakDefinition); | ||||||
2051 | case DK_WEAK_REFERENCE: | ||||||
2052 | return parseDirectiveSymbolAttribute(MCSA_WeakReference); | ||||||
2053 | case DK_WEAK_DEF_CAN_BE_HIDDEN: | ||||||
2054 | return parseDirectiveSymbolAttribute(MCSA_WeakDefAutoPrivate); | ||||||
2055 | case DK_COLD: | ||||||
2056 | return parseDirectiveSymbolAttribute(MCSA_Cold); | ||||||
2057 | case DK_COMM: | ||||||
2058 | case DK_COMMON: | ||||||
2059 | return parseDirectiveComm(/*IsLocal=*/false); | ||||||
2060 | case DK_LCOMM: | ||||||
2061 | return parseDirectiveComm(/*IsLocal=*/true); | ||||||
2062 | case DK_ABORT: | ||||||
2063 | return parseDirectiveAbort(); | ||||||
2064 | case DK_INCLUDE: | ||||||
2065 | return parseDirectiveInclude(); | ||||||
2066 | case DK_INCBIN: | ||||||
2067 | return parseDirectiveIncbin(); | ||||||
2068 | case DK_CODE16: | ||||||
2069 | case DK_CODE16GCC: | ||||||
2070 | return TokError(Twine(IDVal) + | ||||||
2071 | " not currently supported for this target"); | ||||||
2072 | case DK_REPT: | ||||||
2073 | return parseDirectiveRept(IDLoc, IDVal); | ||||||
2074 | case DK_IRP: | ||||||
2075 | return parseDirectiveIrp(IDLoc); | ||||||
2076 | case DK_IRPC: | ||||||
2077 | return parseDirectiveIrpc(IDLoc); | ||||||
2078 | case DK_ENDR: | ||||||
2079 | return parseDirectiveEndr(IDLoc); | ||||||
2080 | case DK_BUNDLE_ALIGN_MODE: | ||||||
2081 | return parseDirectiveBundleAlignMode(); | ||||||
2082 | case DK_BUNDLE_LOCK: | ||||||
2083 | return parseDirectiveBundleLock(); | ||||||
2084 | case DK_BUNDLE_UNLOCK: | ||||||
2085 | return parseDirectiveBundleUnlock(); | ||||||
2086 | case DK_SLEB128: | ||||||
2087 | return parseDirectiveLEB128(true); | ||||||
2088 | case DK_ULEB128: | ||||||
2089 | return parseDirectiveLEB128(false); | ||||||
2090 | case DK_SPACE: | ||||||
2091 | case DK_SKIP: | ||||||
2092 | return parseDirectiveSpace(IDVal); | ||||||
2093 | case DK_FILE: | ||||||
2094 | return parseDirectiveFile(IDLoc); | ||||||
2095 | case DK_LINE: | ||||||
2096 | return parseDirectiveLine(); | ||||||
2097 | case DK_LOC: | ||||||
2098 | return parseDirectiveLoc(); | ||||||
2099 | case DK_STABS: | ||||||
2100 | return parseDirectiveStabs(); | ||||||
2101 | case DK_CV_FILE: | ||||||
2102 | return parseDirectiveCVFile(); | ||||||
2103 | case DK_CV_FUNC_ID: | ||||||
2104 | return parseDirectiveCVFuncId(); | ||||||
2105 | case DK_CV_INLINE_SITE_ID: | ||||||
2106 | return parseDirectiveCVInlineSiteId(); | ||||||
2107 | case DK_CV_LOC: | ||||||
2108 | return parseDirectiveCVLoc(); | ||||||
2109 | case DK_CV_LINETABLE: | ||||||
2110 | return parseDirectiveCVLinetable(); | ||||||
2111 | case DK_CV_INLINE_LINETABLE: | ||||||
2112 | return parseDirectiveCVInlineLinetable(); | ||||||
2113 | case DK_CV_DEF_RANGE: | ||||||
2114 | return parseDirectiveCVDefRange(); | ||||||
2115 | case DK_CV_STRING: | ||||||
2116 | return parseDirectiveCVString(); | ||||||
2117 | case DK_CV_STRINGTABLE: | ||||||
2118 | return parseDirectiveCVStringTable(); | ||||||
2119 | case DK_CV_FILECHECKSUMS: | ||||||
2120 | return parseDirectiveCVFileChecksums(); | ||||||
2121 | case DK_CV_FILECHECKSUM_OFFSET: | ||||||
2122 | return parseDirectiveCVFileChecksumOffset(); | ||||||
2123 | case DK_CV_FPO_DATA: | ||||||
2124 | return parseDirectiveCVFPOData(); | ||||||
2125 | case DK_CFI_SECTIONS: | ||||||
2126 | return parseDirectiveCFISections(); | ||||||
2127 | case DK_CFI_STARTPROC: | ||||||
2128 | return parseDirectiveCFIStartProc(); | ||||||
2129 | case DK_CFI_ENDPROC: | ||||||
2130 | return parseDirectiveCFIEndProc(); | ||||||
2131 | case DK_CFI_DEF_CFA: | ||||||
2132 | return parseDirectiveCFIDefCfa(IDLoc); | ||||||
2133 | case DK_CFI_DEF_CFA_OFFSET: | ||||||
2134 | return parseDirectiveCFIDefCfaOffset(); | ||||||
2135 | case DK_CFI_ADJUST_CFA_OFFSET: | ||||||
2136 | return parseDirectiveCFIAdjustCfaOffset(); | ||||||
2137 | case DK_CFI_DEF_CFA_REGISTER: | ||||||
2138 | return parseDirectiveCFIDefCfaRegister(IDLoc); | ||||||
2139 | case DK_CFI_OFFSET: | ||||||
2140 | return parseDirectiveCFIOffset(IDLoc); | ||||||
2141 | case DK_CFI_REL_OFFSET: | ||||||
2142 | return parseDirectiveCFIRelOffset(IDLoc); | ||||||
2143 | case DK_CFI_PERSONALITY: | ||||||
2144 | return parseDirectiveCFIPersonalityOrLsda(true); | ||||||
2145 | case DK_CFI_LSDA: | ||||||
2146 | return parseDirectiveCFIPersonalityOrLsda(false); | ||||||
2147 | case DK_CFI_REMEMBER_STATE: | ||||||
2148 | return parseDirectiveCFIRememberState(); | ||||||
2149 | case DK_CFI_RESTORE_STATE: | ||||||
2150 | return parseDirectiveCFIRestoreState(); | ||||||
2151 | case DK_CFI_SAME_VALUE: | ||||||
2152 | return parseDirectiveCFISameValue(IDLoc); | ||||||
2153 | case DK_CFI_RESTORE: | ||||||
2154 | return parseDirectiveCFIRestore(IDLoc); | ||||||
2155 | case DK_CFI_ESCAPE: | ||||||
2156 | return parseDirectiveCFIEscape(); | ||||||
2157 | case DK_CFI_RETURN_COLUMN: | ||||||
2158 | return parseDirectiveCFIReturnColumn(IDLoc); | ||||||
2159 | case DK_CFI_SIGNAL_FRAME: | ||||||
2160 | return parseDirectiveCFISignalFrame(); | ||||||
2161 | case DK_CFI_UNDEFINED: | ||||||
2162 | return parseDirectiveCFIUndefined(IDLoc); | ||||||
2163 | case DK_CFI_REGISTER: | ||||||
2164 | return parseDirectiveCFIRegister(IDLoc); | ||||||
2165 | case DK_CFI_WINDOW_SAVE: | ||||||
2166 | return parseDirectiveCFIWindowSave(); | ||||||
2167 | case DK_MACROS_ON: | ||||||
2168 | case DK_MACROS_OFF: | ||||||
2169 | return parseDirectiveMacrosOnOff(IDVal); | ||||||
2170 | case DK_MACRO: | ||||||
2171 | return parseDirectiveMacro(IDLoc); | ||||||
2172 | case DK_ALTMACRO: | ||||||
2173 | case DK_NOALTMACRO: | ||||||
2174 | return parseDirectiveAltmacro(IDVal); | ||||||
2175 | case DK_EXITM: | ||||||
2176 | return parseDirectiveExitMacro(IDVal); | ||||||
2177 | case DK_ENDM: | ||||||
2178 | case DK_ENDMACRO: | ||||||
2179 | return parseDirectiveEndMacro(IDVal); | ||||||
2180 | case DK_PURGEM: | ||||||
2181 | return parseDirectivePurgeMacro(IDLoc); | ||||||
2182 | case DK_END: | ||||||
2183 | return parseDirectiveEnd(IDLoc); | ||||||
2184 | case DK_ERR: | ||||||
2185 | return parseDirectiveError(IDLoc, false); | ||||||
2186 | case DK_ERROR: | ||||||
2187 | return parseDirectiveError(IDLoc, true); | ||||||
2188 | case DK_WARNING: | ||||||
2189 | return parseDirectiveWarning(IDLoc); | ||||||
2190 | case DK_RELOC: | ||||||
2191 | return parseDirectiveReloc(IDLoc); | ||||||
2192 | case DK_DCB: | ||||||
2193 | case DK_DCB_W: | ||||||
2194 | return parseDirectiveDCB(IDVal, 2); | ||||||
2195 | case DK_DCB_B: | ||||||
2196 | return parseDirectiveDCB(IDVal, 1); | ||||||
2197 | case DK_DCB_D: | ||||||
2198 | return parseDirectiveRealDCB(IDVal, APFloat::IEEEdouble()); | ||||||
2199 | case DK_DCB_L: | ||||||
2200 | return parseDirectiveDCB(IDVal, 4); | ||||||
2201 | case DK_DCB_S: | ||||||
2202 | return parseDirectiveRealDCB(IDVal, APFloat::IEEEsingle()); | ||||||
2203 | case DK_DC_X: | ||||||
2204 | case DK_DCB_X: | ||||||
2205 | return TokError(Twine(IDVal) + | ||||||
2206 | " not currently supported for this target"); | ||||||
2207 | case DK_DS: | ||||||
2208 | case DK_DS_W: | ||||||
2209 | return parseDirectiveDS(IDVal, 2); | ||||||
2210 | case DK_DS_B: | ||||||
2211 | return parseDirectiveDS(IDVal, 1); | ||||||
2212 | case DK_DS_D: | ||||||
2213 | return parseDirectiveDS(IDVal, 8); | ||||||
2214 | case DK_DS_L: | ||||||
2215 | case DK_DS_S: | ||||||
2216 | return parseDirectiveDS(IDVal, 4); | ||||||
2217 | case DK_DS_P: | ||||||
2218 | case DK_DS_X: | ||||||
2219 | return parseDirectiveDS(IDVal, 12); | ||||||
2220 | case DK_PRINT: | ||||||
2221 | return parseDirectivePrint(IDLoc); | ||||||
2222 | case DK_ADDRSIG: | ||||||
2223 | return parseDirectiveAddrsig(); | ||||||
2224 | case DK_ADDRSIG_SYM: | ||||||
2225 | return parseDirectiveAddrsigSym(); | ||||||
2226 | case DK_PSEUDO_PROBE: | ||||||
2227 | return parseDirectivePseudoProbe(); | ||||||
2228 | case DK_LTO_DISCARD: | ||||||
2229 | return parseDirectiveLTODiscard(); | ||||||
2230 | } | ||||||
2231 | |||||||
2232 | return Error(IDLoc, "unknown directive"); | ||||||
2233 | } | ||||||
2234 | |||||||
2235 | // __asm _emit or __asm __emit | ||||||
2236 | if (ParsingMSInlineAsm && (IDVal == "_emit" || IDVal == "__emit" || | ||||||
2237 | IDVal == "_EMIT" || IDVal == "__EMIT")) | ||||||
2238 | return parseDirectiveMSEmit(IDLoc, Info, IDVal.size()); | ||||||
2239 | |||||||
2240 | // __asm align | ||||||
2241 | if (ParsingMSInlineAsm && (IDVal == "align" || IDVal == "ALIGN")) | ||||||
2242 | return parseDirectiveMSAlign(IDLoc, Info); | ||||||
2243 | |||||||
2244 | if (ParsingMSInlineAsm && (IDVal == "even" || IDVal == "EVEN")) | ||||||
2245 | Info.AsmRewrites->emplace_back(AOK_EVEN, IDLoc, 4); | ||||||
2246 | if (checkForValidSection()) | ||||||
2247 | return true; | ||||||
2248 | |||||||
2249 | // Canonicalize the opcode to lower case. | ||||||
2250 | std::string OpcodeStr = IDVal.lower(); | ||||||
2251 | ParseInstructionInfo IInfo(Info.AsmRewrites); | ||||||
2252 | bool ParseHadError = getTargetParser().ParseInstruction(IInfo, OpcodeStr, ID, | ||||||
2253 | Info.ParsedOperands); | ||||||
2254 | Info.ParseError = ParseHadError; | ||||||
2255 | |||||||
2256 | // Dump the parsed representation, if requested. | ||||||
2257 | if (getShowParsedOperands()) { | ||||||
2258 | SmallString<256> Str; | ||||||
2259 | raw_svector_ostream OS(Str); | ||||||
2260 | OS << "parsed instruction: ["; | ||||||
2261 | for (unsigned i = 0; i != Info.ParsedOperands.size(); ++i) { | ||||||
2262 | if (i != 0) | ||||||
2263 | OS << ", "; | ||||||
2264 | Info.ParsedOperands[i]->print(OS); | ||||||
2265 | } | ||||||
2266 | OS << "]"; | ||||||
2267 | |||||||
2268 | printMessage(IDLoc, SourceMgr::DK_Note, OS.str()); | ||||||
2269 | } | ||||||
2270 | |||||||
2271 | // Fail even if ParseInstruction erroneously returns false. | ||||||
2272 | if (hasPendingError() || ParseHadError) | ||||||
2273 | return true; | ||||||
2274 | |||||||
2275 | // If we are generating dwarf for the current section then generate a .loc | ||||||
2276 | // directive for the instruction. | ||||||
2277 | if (!ParseHadError && enabledGenDwarfForAssembly() && | ||||||
2278 | getContext().getGenDwarfSectionSyms().count( | ||||||
2279 | getStreamer().getCurrentSectionOnly())) { | ||||||
2280 | unsigned Line; | ||||||
2281 | if (ActiveMacros.empty()) | ||||||
2282 | Line = SrcMgr.FindLineNumber(IDLoc, CurBuffer); | ||||||
2283 | else | ||||||
2284 | Line = SrcMgr.FindLineNumber(ActiveMacros.front()->InstantiationLoc, | ||||||
2285 | ActiveMacros.front()->ExitBuffer); | ||||||
2286 | |||||||
2287 | // If we previously parsed a cpp hash file line comment then make sure the | ||||||
2288 | // current Dwarf File is for the CppHashFilename if not then emit the | ||||||
2289 | // Dwarf File table for it and adjust the line number for the .loc. | ||||||
2290 | if (!CppHashInfo.Filename.empty()) { | ||||||
2291 | unsigned FileNumber = getStreamer().emitDwarfFileDirective( | ||||||
2292 | 0, StringRef(), CppHashInfo.Filename); | ||||||
2293 | getContext().setGenDwarfFileNumber(FileNumber); | ||||||
2294 | |||||||
2295 | unsigned CppHashLocLineNo = | ||||||
2296 | SrcMgr.FindLineNumber(CppHashInfo.Loc, CppHashInfo.Buf); | ||||||
2297 | Line = CppHashInfo.LineNumber - 1 + (Line - CppHashLocLineNo); | ||||||
2298 | } | ||||||
2299 | |||||||
2300 | getStreamer().emitDwarfLocDirective( | ||||||
2301 | getContext().getGenDwarfFileNumber(), Line, 0, | ||||||
2302 | DWARF2_LINE_DEFAULT_IS_STMT1 ? DWARF2_FLAG_IS_STMT(1 << 0) : 0, 0, 0, | ||||||
2303 | StringRef()); | ||||||
2304 | } | ||||||
2305 | |||||||
2306 | // If parsing succeeded, match the instruction. | ||||||
2307 | if (!ParseHadError) { | ||||||
2308 | uint64_t ErrorInfo; | ||||||
2309 | if (getTargetParser().MatchAndEmitInstruction( | ||||||
2310 | IDLoc, Info.Opcode, Info.ParsedOperands, Out, ErrorInfo, | ||||||
2311 | getTargetParser().isParsingMSInlineAsm())) | ||||||
2312 | return true; | ||||||
2313 | } | ||||||
2314 | return false; | ||||||
2315 | } | ||||||
2316 | |||||||
2317 | // Parse and erase curly braces marking block start/end | ||||||
2318 | bool | ||||||
2319 | AsmParser::parseCurlyBlockScope(SmallVectorImpl<AsmRewrite> &AsmStrRewrites) { | ||||||
2320 | // Identify curly brace marking block start/end | ||||||
2321 | if (Lexer.isNot(AsmToken::LCurly) && Lexer.isNot(AsmToken::RCurly)) | ||||||
2322 | return false; | ||||||
2323 | |||||||
2324 | SMLoc StartLoc = Lexer.getLoc(); | ||||||
2325 | Lex(); // Eat the brace | ||||||
2326 | if (Lexer.is(AsmToken::EndOfStatement)) | ||||||
2327 | Lex(); // Eat EndOfStatement following the brace | ||||||
2328 | |||||||
2329 | // Erase the block start/end brace from the output asm string | ||||||
2330 | AsmStrRewrites.emplace_back(AOK_Skip, StartLoc, Lexer.getLoc().getPointer() - | ||||||
2331 | StartLoc.getPointer()); | ||||||
2332 | return true; | ||||||
2333 | } | ||||||
2334 | |||||||
2335 | /// parseCppHashLineFilenameComment as this: | ||||||
2336 | /// ::= # number "filename" | ||||||
2337 | bool AsmParser::parseCppHashLineFilenameComment(SMLoc L, bool SaveLocInfo) { | ||||||
2338 | Lex(); // Eat the hash token. | ||||||
2339 | // Lexer only ever emits HashDirective if it fully formed if it's | ||||||
2340 | // done the checking already so this is an internal error. | ||||||
2341 | 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~++20210405022414+5f57793c4fe4/llvm/lib/MC/MCParser/AsmParser.cpp" , 2342, __PRETTY_FUNCTION__)) | ||||||
2342 | "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~++20210405022414+5f57793c4fe4/llvm/lib/MC/MCParser/AsmParser.cpp" , 2342, __PRETTY_FUNCTION__)); | ||||||
2343 | int64_t LineNumber = getTok().getIntVal(); | ||||||
2344 | Lex(); | ||||||
2345 | 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~++20210405022414+5f57793c4fe4/llvm/lib/MC/MCParser/AsmParser.cpp" , 2346, __PRETTY_FUNCTION__)) | ||||||
2346 | "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~++20210405022414+5f57793c4fe4/llvm/lib/MC/MCParser/AsmParser.cpp" , 2346, __PRETTY_FUNCTION__)); | ||||||
2347 | StringRef Filename = getTok().getString(); | ||||||
2348 | Lex(); | ||||||
2349 | |||||||
2350 | if (!SaveLocInfo) | ||||||
2351 | return false; | ||||||
2352 | |||||||
2353 | // Get rid of the enclosing quotes. | ||||||
2354 | Filename = Filename.substr(1, Filename.size() - 2); | ||||||
2355 | |||||||
2356 | // Save the SMLoc, Filename and LineNumber for later use by diagnostics | ||||||
2357 | // and possibly DWARF file info. | ||||||
2358 | CppHashInfo.Loc = L; | ||||||
2359 | CppHashInfo.Filename = Filename; | ||||||
2360 | CppHashInfo.LineNumber = LineNumber; | ||||||
2361 | CppHashInfo.Buf = CurBuffer; | ||||||
2362 | if (FirstCppHashFilename.empty()) | ||||||
2363 | FirstCppHashFilename = Filename; | ||||||
2364 | return false; | ||||||
2365 | } | ||||||
2366 | |||||||
2367 | /// will use the last parsed cpp hash line filename comment | ||||||
2368 | /// for the Filename and LineNo if any in the diagnostic. | ||||||
2369 | void AsmParser::DiagHandler(const SMDiagnostic &Diag, void *Context) { | ||||||
2370 | auto *Parser = static_cast<AsmParser *>(Context); | ||||||
2371 | raw_ostream &OS = errs(); | ||||||
2372 | |||||||
2373 | const SourceMgr &DiagSrcMgr = *Diag.getSourceMgr(); | ||||||
2374 | SMLoc DiagLoc = Diag.getLoc(); | ||||||
2375 | unsigned DiagBuf = DiagSrcMgr.FindBufferContainingLoc(DiagLoc); | ||||||
2376 | unsigned CppHashBuf = | ||||||
2377 | Parser->SrcMgr.FindBufferContainingLoc(Parser->CppHashInfo.Loc); | ||||||
2378 | |||||||
2379 | // Like SourceMgr::printMessage() we need to print the include stack if any | ||||||
2380 | // before printing the message. | ||||||
2381 | unsigned DiagCurBuffer = DiagSrcMgr.FindBufferContainingLoc(DiagLoc); | ||||||
2382 | if (!Parser->SavedDiagHandler && DiagCurBuffer && | ||||||
2383 | DiagCurBuffer != DiagSrcMgr.getMainFileID()) { | ||||||
2384 | SMLoc ParentIncludeLoc = DiagSrcMgr.getParentIncludeLoc(DiagCurBuffer); | ||||||
2385 | DiagSrcMgr.PrintIncludeStack(ParentIncludeLoc, OS); | ||||||
2386 | } | ||||||
2387 | |||||||
2388 | // If we have not parsed a cpp hash line filename comment or the source | ||||||
2389 | // manager changed or buffer changed (like in a nested include) then just | ||||||
2390 | // print the normal diagnostic using its Filename and LineNo. | ||||||
2391 | if (!Parser->CppHashInfo.LineNumber || DiagBuf != CppHashBuf) { | ||||||
2392 | if (Parser->SavedDiagHandler) | ||||||
2393 | Parser->SavedDiagHandler(Diag, Parser->SavedDiagContext); | ||||||
2394 | else | ||||||
2395 | Parser->getContext().diagnose(Diag); | ||||||
2396 | return; | ||||||
2397 | } | ||||||
2398 | |||||||
2399 | // Use the CppHashFilename and calculate a line number based on the | ||||||
2400 | // CppHashInfo.Loc and CppHashInfo.LineNumber relative to this Diag's SMLoc | ||||||
2401 | // for the diagnostic. | ||||||
2402 | const std::string &Filename = std::string(Parser->CppHashInfo.Filename); | ||||||
2403 | |||||||
2404 | int DiagLocLineNo = DiagSrcMgr.FindLineNumber(DiagLoc, DiagBuf); | ||||||
2405 | int CppHashLocLineNo = | ||||||
2406 | Parser->SrcMgr.FindLineNumber(Parser->CppHashInfo.Loc, CppHashBuf); | ||||||
2407 | int LineNo = | ||||||
2408 | Parser->CppHashInfo.LineNumber - 1 + (DiagLocLineNo - CppHashLocLineNo); | ||||||
2409 | |||||||
2410 | SMDiagnostic NewDiag(*Diag.getSourceMgr(), Diag.getLoc(), Filename, LineNo, | ||||||
2411 | Diag.getColumnNo(), Diag.getKind(), Diag.getMessage(), | ||||||
2412 | Diag.getLineContents(), Diag.getRanges()); | ||||||
2413 | |||||||
2414 | if (Parser->SavedDiagHandler) | ||||||
2415 | Parser->SavedDiagHandler(Diag, Parser->SavedDiagContext); | ||||||
2416 | else | ||||||
2417 | Parser->getContext().diagnose(NewDiag); | ||||||
2418 | } | ||||||
2419 | |||||||
2420 | // FIXME: This is mostly duplicated from the function in AsmLexer.cpp. The | ||||||
2421 | // difference being that that function accepts '@' as part of identifiers and | ||||||
2422 | // we can't do that. AsmLexer.cpp should probably be changed to handle | ||||||
2423 | // '@' as a special case when needed. | ||||||
2424 | static bool isIdentifierChar(char c) { | ||||||
2425 | return isalnum(static_cast<unsigned char>(c)) || c == '_' || c == '$' || | ||||||
2426 | c == '.'; | ||||||
2427 | } | ||||||
2428 | |||||||
2429 | bool AsmParser::expandMacro(raw_svector_ostream &OS, StringRef Body, | ||||||
2430 | ArrayRef<MCAsmMacroParameter> Parameters, | ||||||
2431 | ArrayRef<MCAsmMacroArgument> A, | ||||||
2432 | bool EnableAtPseudoVariable, SMLoc L) { | ||||||
2433 | unsigned NParameters = Parameters.size(); | ||||||
2434 | bool HasVararg = NParameters ? Parameters.back().Vararg : false; | ||||||
2435 | if ((!IsDarwin || NParameters != 0) && NParameters != A.size()) | ||||||
2436 | return Error(L, "Wrong number of arguments"); | ||||||
2437 | |||||||
2438 | // A macro without parameters is handled differently on Darwin: | ||||||
2439 | // gas accepts no arguments and does no substitutions | ||||||
2440 | while (!Body.empty()) { | ||||||
2441 | // Scan for the next substitution. | ||||||
2442 | std::size_t End = Body.size(), Pos = 0; | ||||||
2443 | for (; Pos != End; ++Pos) { | ||||||
2444 | // Check for a substitution or escape. | ||||||
2445 | if (IsDarwin && !NParameters) { | ||||||
2446 | // This macro has no parameters, look for $0, $1, etc. | ||||||
2447 | if (Body[Pos] != '$' || Pos + 1 == End) | ||||||
2448 | continue; | ||||||
2449 | |||||||
2450 | char Next = Body[Pos + 1]; | ||||||
2451 | if (Next == '$' || Next == 'n' || | ||||||
2452 | isdigit(static_cast<unsigned char>(Next))) | ||||||
2453 | break; | ||||||
2454 | } else { | ||||||
2455 | // This macro has parameters, look for \foo, \bar, etc. | ||||||
2456 | if (Body[Pos] == '\\' && Pos + 1 != End) | ||||||
2457 | break; | ||||||
2458 | } | ||||||
2459 | } | ||||||
2460 | |||||||
2461 | // Add the prefix. | ||||||
2462 | OS << Body.slice(0, Pos); | ||||||
2463 | |||||||
2464 | // Check if we reached the end. | ||||||
2465 | if (Pos == End) | ||||||
2466 | break; | ||||||
2467 | |||||||
2468 | if (IsDarwin && !NParameters) { | ||||||
2469 | switch (Body[Pos + 1]) { | ||||||
2470 | // $$ => $ | ||||||
2471 | case '$': | ||||||
2472 | OS << '$'; | ||||||
2473 | break; | ||||||
2474 | |||||||
2475 | // $n => number of arguments | ||||||
2476 | case 'n': | ||||||
2477 | OS << A.size(); | ||||||
2478 | break; | ||||||
2479 | |||||||
2480 | // $[0-9] => argument | ||||||
2481 | default: { | ||||||
2482 | // Missing arguments are ignored. | ||||||
2483 | unsigned Index = Body[Pos + 1] - '0'; | ||||||
2484 | if (Index >= A.size()) | ||||||
2485 | break; | ||||||
2486 | |||||||
2487 | // Otherwise substitute with the token values, with spaces eliminated. | ||||||
2488 | for (const AsmToken &Token : A[Index]) | ||||||
2489 | OS << Token.getString(); | ||||||
2490 | break; | ||||||
2491 | } | ||||||
2492 | } | ||||||
2493 | Pos += 2; | ||||||
2494 | } else { | ||||||
2495 | unsigned I = Pos + 1; | ||||||
2496 | |||||||
2497 | // Check for the \@ pseudo-variable. | ||||||
2498 | if (EnableAtPseudoVariable && Body[I] == '@' && I + 1 != End) | ||||||
2499 | ++I; | ||||||
2500 | else | ||||||
2501 | while (isIdentifierChar(Body[I]) && I + 1 != End) | ||||||
2502 | ++I; | ||||||
2503 | |||||||
2504 | const char *Begin = Body.data() + Pos + 1; | ||||||
2505 | StringRef Argument(Begin, I - (Pos + 1)); | ||||||
2506 | unsigned Index = 0; | ||||||
2507 | |||||||
2508 | if (Argument == "@") { | ||||||
2509 | OS << NumOfMacroInstantiations; | ||||||
2510 | Pos += 2; | ||||||
2511 | } else { | ||||||
2512 | for (; Index < NParameters; ++Index) | ||||||
2513 | if (Parameters[Index].Name == Argument) | ||||||
2514 | break; | ||||||
2515 | |||||||
2516 | if (Index == NParameters) { | ||||||
2517 | if (Body[Pos + 1] == '(' && Body[Pos + 2] == ')') | ||||||
2518 | Pos += 3; | ||||||
2519 | else { | ||||||
2520 | OS << '\\' << Argument; | ||||||
2521 | Pos = I; | ||||||
2522 | } | ||||||
2523 | } else { | ||||||
2524 | bool VarargParameter = HasVararg && Index == (NParameters - 1); | ||||||
2525 | for (const AsmToken &Token : A[Index]) | ||||||
2526 | // For altmacro mode, you can write '%expr'. | ||||||
2527 | // The prefix '%' evaluates the expression 'expr' | ||||||
2528 | // and uses the result as a string (e.g. replace %(1+2) with the | ||||||
2529 | // string "3"). | ||||||
2530 | // Here, we identify the integer token which is the result of the | ||||||
2531 | // absolute expression evaluation and replace it with its string | ||||||
2532 | // representation. | ||||||
2533 | if (AltMacroMode && Token.getString().front() == '%' && | ||||||
2534 | Token.is(AsmToken::Integer)) | ||||||
2535 | // Emit an integer value to the buffer. | ||||||
2536 | OS << Token.getIntVal(); | ||||||
2537 | // Only Token that was validated as a string and begins with '<' | ||||||
2538 | // is considered altMacroString!!! | ||||||
2539 | else if (AltMacroMode && Token.getString().front() == '<' && | ||||||
2540 | Token.is(AsmToken::String)) { | ||||||
2541 | OS << angleBracketString(Token.getStringContents()); | ||||||
2542 | } | ||||||
2543 | // We expect no quotes around the string's contents when | ||||||
2544 | // parsing for varargs. | ||||||
2545 | else if (Token.isNot(AsmToken::String) || VarargParameter) | ||||||
2546 | OS << Token.getString(); | ||||||
2547 | else | ||||||
2548 | OS << Token.getStringContents(); | ||||||
2549 | |||||||
2550 | Pos += 1 + Argument.size(); | ||||||
2551 | } | ||||||
2552 | } | ||||||
2553 | } | ||||||
2554 | // Update the scan point. | ||||||
2555 | Body = Body.substr(Pos); | ||||||
2556 | } | ||||||
2557 | |||||||
2558 | return false; | ||||||
2559 | } | ||||||
2560 | |||||||
2561 | static bool isOperator(AsmToken::TokenKind kind) { | ||||||
2562 | switch (kind) { | ||||||
2563 | default: | ||||||
2564 | return false; | ||||||
2565 | case AsmToken::Plus: | ||||||
2566 | case AsmToken::Minus: | ||||||
2567 | case AsmToken::Tilde: | ||||||
2568 | case AsmToken::Slash: | ||||||
2569 | case AsmToken::Star: | ||||||
2570 | case AsmToken::Dot: | ||||||
2571 | case AsmToken::Equal: | ||||||
2572 | case AsmToken::EqualEqual: | ||||||
2573 | case AsmToken::Pipe: | ||||||
2574 | case AsmToken::PipePipe: | ||||||
2575 | case AsmToken::Caret: | ||||||
2576 | case AsmToken::Amp: | ||||||
2577 | case AsmToken::AmpAmp: | ||||||
2578 | case AsmToken::Exclaim: | ||||||
2579 | case AsmToken::ExclaimEqual: | ||||||
2580 | case AsmToken::Less: | ||||||
2581 | case AsmToken::LessEqual: | ||||||
2582 | case AsmToken::LessLess: | ||||||
2583 | case AsmToken::LessGreater: | ||||||
2584 | case AsmToken::Greater: | ||||||
2585 | case AsmToken::GreaterEqual: | ||||||
2586 | case AsmToken::GreaterGreater: | ||||||
2587 | return true; | ||||||
2588 | } | ||||||
2589 | } | ||||||
2590 | |||||||
2591 | namespace { | ||||||
2592 | |||||||
2593 | class AsmLexerSkipSpaceRAII { | ||||||
2594 | public: | ||||||
2595 | AsmLexerSkipSpaceRAII(AsmLexer &Lexer, bool SkipSpace) : Lexer(Lexer) { | ||||||
2596 | Lexer.setSkipSpace(SkipSpace); | ||||||
2597 | } | ||||||
2598 | |||||||
2599 | ~AsmLexerSkipSpaceRAII() { | ||||||
2600 | Lexer.setSkipSpace(true); | ||||||
2601 | } | ||||||
2602 | |||||||
2603 | private: | ||||||
2604 | AsmLexer &Lexer; | ||||||
2605 | }; | ||||||
2606 | |||||||
2607 | } // end anonymous namespace | ||||||
2608 | |||||||
2609 | bool AsmParser::parseMacroArgument(MCAsmMacroArgument &MA, bool Vararg) { | ||||||
2610 | |||||||
2611 | if (Vararg) { | ||||||
2612 | if (Lexer.isNot(AsmToken::EndOfStatement)) { | ||||||
2613 | StringRef Str = parseStringToEndOfStatement(); | ||||||
2614 | MA.emplace_back(AsmToken::String, Str); | ||||||
2615 | } | ||||||
2616 | return false; | ||||||
2617 | } | ||||||
2618 | |||||||
2619 | unsigned ParenLevel = 0; | ||||||
2620 | |||||||
2621 | // Darwin doesn't use spaces to delmit arguments. | ||||||
2622 | AsmLexerSkipSpaceRAII ScopedSkipSpace(Lexer, IsDarwin); | ||||||
2623 | |||||||
2624 | bool SpaceEaten; | ||||||
2625 | |||||||
2626 | while (true) { | ||||||
2627 | SpaceEaten = false; | ||||||
2628 | if (Lexer.is(AsmToken::Eof) || Lexer.is(AsmToken::Equal)) | ||||||
2629 | return TokError("unexpected token in macro instantiation"); | ||||||
2630 | |||||||
2631 | if (ParenLevel == 0) { | ||||||
2632 | |||||||
2633 | if (Lexer.is(AsmToken::Comma)) | ||||||
2634 | break; | ||||||
2635 | |||||||
2636 | if (Lexer.is(AsmToken::Space)) { | ||||||
2637 | SpaceEaten = true; | ||||||
2638 | Lexer.Lex(); // Eat spaces | ||||||
2639 | } | ||||||
2640 | |||||||
2641 | // Spaces can delimit parameters, but could also be part an expression. | ||||||
2642 | // If the token after a space is an operator, add the token and the next | ||||||
2643 | // one into this argument | ||||||
2644 | if (!IsDarwin) { | ||||||
2645 | if (isOperator(Lexer.getKind())) { | ||||||
2646 | MA.push_back(getTok()); | ||||||
2647 | Lexer.Lex(); | ||||||
2648 | |||||||
2649 | // Whitespace after an operator can be ignored. | ||||||
2650 | if (Lexer.is(AsmToken::Space)) | ||||||
2651 | Lexer.Lex(); | ||||||
2652 | |||||||
2653 | continue; | ||||||
2654 | } | ||||||
2655 | } | ||||||
2656 | if (SpaceEaten) | ||||||
2657 | break; | ||||||
2658 | } | ||||||
2659 | |||||||
2660 | // handleMacroEntry relies on not advancing the lexer here | ||||||
2661 | // to be able to fill in the remaining default parameter values | ||||||
2662 | if (Lexer.is(AsmToken::EndOfStatement)) | ||||||
2663 | break; | ||||||
2664 | |||||||
2665 | // Adjust the current parentheses level. | ||||||
2666 | if (Lexer.is(AsmToken::LParen)) | ||||||
2667 | ++ParenLevel; | ||||||
2668 | else if (Lexer.is(AsmToken::RParen) && ParenLevel) | ||||||
2669 | --ParenLevel; | ||||||
2670 | |||||||
2671 | // Append the token to the current argument list. | ||||||
2672 | MA.push_back(getTok()); | ||||||
2673 | Lexer.Lex(); | ||||||
2674 | } | ||||||
2675 | |||||||
2676 | if (ParenLevel != 0) | ||||||
2677 | return TokError("unbalanced parentheses in macro argument"); | ||||||
2678 | return false; | ||||||
2679 | } | ||||||
2680 | |||||||
2681 | // Parse the macro instantiation arguments. | ||||||
2682 | bool AsmParser::parseMacroArguments(const MCAsmMacro *M, | ||||||
2683 | MCAsmMacroArguments &A) { | ||||||
2684 | const unsigned NParameters = M ? M->Parameters.size() : 0; | ||||||
2685 | bool NamedParametersFound = false; | ||||||
2686 | SmallVector<SMLoc, 4> FALocs; | ||||||
2687 | |||||||
2688 | A.resize(NParameters); | ||||||
2689 | FALocs.resize(NParameters); | ||||||
2690 | |||||||
2691 | // Parse two kinds of macro invocations: | ||||||
2692 | // - macros defined without any parameters accept an arbitrary number of them | ||||||
2693 | // - macros defined with parameters accept at most that many of them | ||||||
2694 | bool HasVararg = NParameters ? M->Parameters.back().Vararg : false; | ||||||
2695 | for (unsigned Parameter = 0; !NParameters || Parameter < NParameters; | ||||||
2696 | ++Parameter) { | ||||||
2697 | SMLoc IDLoc = Lexer.getLoc(); | ||||||
2698 | MCAsmMacroParameter FA; | ||||||
2699 | |||||||
2700 | if (Lexer.is(AsmToken::Identifier) && Lexer.peekTok().is(AsmToken::Equal)) { | ||||||
2701 | if (parseIdentifier(FA.Name)) | ||||||
2702 | return Error(IDLoc, "invalid argument identifier for formal argument"); | ||||||
2703 | |||||||
2704 | if (Lexer.isNot(AsmToken::Equal)) | ||||||
2705 | return TokError("expected '=' after formal parameter identifier"); | ||||||
2706 | |||||||
2707 | Lex(); | ||||||
2708 | |||||||
2709 | NamedParametersFound = true; | ||||||
2710 | } | ||||||
2711 | bool Vararg = HasVararg && Parameter == (NParameters - 1); | ||||||
2712 | |||||||
2713 | if (NamedParametersFound && FA.Name.empty()) | ||||||
2714 | return Error(IDLoc, "cannot mix positional and keyword arguments"); | ||||||
2715 | |||||||
2716 | SMLoc StrLoc = Lexer.getLoc(); | ||||||
2717 | SMLoc EndLoc; | ||||||
2718 | if (AltMacroMode && Lexer.is(AsmToken::Percent)) { | ||||||
2719 | const MCExpr *AbsoluteExp; | ||||||
2720 | int64_t Value; | ||||||
2721 | /// Eat '%' | ||||||
2722 | Lex(); | ||||||
2723 | if (parseExpression(AbsoluteExp, EndLoc)) | ||||||
2724 | return false; | ||||||
2725 | if (!AbsoluteExp->evaluateAsAbsolute(Value, | ||||||
2726 | getStreamer().getAssemblerPtr())) | ||||||
2727 | return Error(StrLoc, "expected absolute expression"); | ||||||
2728 | const char *StrChar = StrLoc.getPointer(); | ||||||
2729 | const char *EndChar = EndLoc.getPointer(); | ||||||
2730 | AsmToken newToken(AsmToken::Integer, | ||||||
2731 | StringRef(StrChar, EndChar - StrChar), Value); | ||||||
2732 | FA.Value.push_back(newToken); | ||||||
2733 | } else if (AltMacroMode && Lexer.is(AsmToken::Less) && | ||||||
2734 | isAngleBracketString(StrLoc, EndLoc)) { | ||||||
2735 | const char *StrChar = StrLoc.getPointer(); | ||||||
2736 | const char *EndChar = EndLoc.getPointer(); | ||||||
2737 | jumpToLoc(EndLoc, CurBuffer); | ||||||
2738 | /// Eat from '<' to '>' | ||||||
2739 | Lex(); | ||||||
2740 | AsmToken newToken(AsmToken::String, | ||||||
2741 | StringRef(StrChar, EndChar - StrChar)); | ||||||
2742 | FA.Value.push_back(newToken); | ||||||
2743 | } else if(parseMacroArgument(FA.Value, Vararg)) | ||||||
2744 | return true; | ||||||
2745 | |||||||
2746 | unsigned PI = Parameter; | ||||||
2747 | if (!FA.Name.empty()) { | ||||||
2748 | unsigned FAI = 0; | ||||||
2749 | for (FAI = 0; FAI < NParameters; ++FAI) | ||||||
2750 | if (M->Parameters[FAI].Name == FA.Name) | ||||||
2751 | break; | ||||||
2752 | |||||||
2753 | if (FAI >= NParameters) { | ||||||
2754 | 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~++20210405022414+5f57793c4fe4/llvm/lib/MC/MCParser/AsmParser.cpp" , 2754, __PRETTY_FUNCTION__)); | ||||||
2755 | return Error(IDLoc, "parameter named '" + FA.Name + | ||||||
2756 | "' does not exist for macro '" + M->Name + "'"); | ||||||
2757 | } | ||||||
2758 | PI = FAI; | ||||||
2759 | } | ||||||
2760 | |||||||
2761 | if (!FA.Value.empty()) { | ||||||
2762 | if (A.size() <= PI) | ||||||
2763 | A.resize(PI + 1); | ||||||
2764 | A[PI] = FA.Value; | ||||||
2765 | |||||||
2766 | if (FALocs.size() <= PI) | ||||||
2767 | FALocs.resize(PI + 1); | ||||||
2768 | |||||||
2769 | FALocs[PI] = Lexer.getLoc(); | ||||||
2770 | } | ||||||
2771 | |||||||
2772 | // At the end of the statement, fill in remaining arguments that have | ||||||
2773 | // default values. If there aren't any, then the next argument is | ||||||
2774 | // required but missing | ||||||
2775 | if (Lexer.is(AsmToken::EndOfStatement)) { | ||||||
2776 | bool Failure = false; | ||||||
2777 | for (unsigned FAI = 0; FAI < NParameters; ++FAI) { | ||||||
2778 | if (A[FAI].empty()) { | ||||||
2779 | if (M->Parameters[FAI].Required) { | ||||||
2780 | Error(FALocs[FAI].isValid() ? FALocs[FAI] : Lexer.getLoc(), | ||||||
2781 | "missing value for required parameter " | ||||||
2782 | "'" + M->Parameters[FAI].Name + "' in macro '" + M->Name + "'"); | ||||||
2783 | Failure = true; | ||||||
2784 | } | ||||||
2785 | |||||||
2786 | if (!M->Parameters[FAI].Value.empty()) | ||||||
2787 | A[FAI] = M->Parameters[FAI].Value; | ||||||
2788 | } | ||||||
2789 | } | ||||||
2790 | return Failure; | ||||||
2791 | } | ||||||
2792 | |||||||
2793 | if (Lexer.is(AsmToken::Comma)) | ||||||
2794 | Lex(); | ||||||
2795 | } | ||||||
2796 | |||||||
2797 | return TokError("too many positional arguments"); | ||||||
2798 | } | ||||||
2799 | |||||||
2800 | bool AsmParser::handleMacroEntry(const MCAsmMacro *M, SMLoc NameLoc) { | ||||||
2801 | // Arbitrarily limit macro nesting depth (default matches 'as'). We can | ||||||
2802 | // eliminate this, although we should protect against infinite loops. | ||||||
2803 | unsigned MaxNestingDepth = AsmMacroMaxNestingDepth; | ||||||
2804 | if (ActiveMacros.size() == MaxNestingDepth) { | ||||||
2805 | std::ostringstream MaxNestingDepthError; | ||||||
2806 | MaxNestingDepthError << "macros cannot be nested more than " | ||||||
2807 | << MaxNestingDepth << " levels deep." | ||||||
2808 | << " Use -asm-macro-max-nesting-depth to increase " | ||||||
2809 | "this limit."; | ||||||
2810 | return TokError(MaxNestingDepthError.str()); | ||||||
2811 | } | ||||||
2812 | |||||||
2813 | MCAsmMacroArguments A; | ||||||
2814 | if (parseMacroArguments(M, A)) | ||||||
2815 | return true; | ||||||
2816 | |||||||
2817 | // Macro instantiation is lexical, unfortunately. We construct a new buffer | ||||||
2818 | // to hold the macro body with substitutions. | ||||||
2819 | SmallString<256> Buf; | ||||||
2820 | StringRef Body = M->Body; | ||||||
2821 | raw_svector_ostream OS(Buf); | ||||||
2822 | |||||||
2823 | if (expandMacro(OS, Body, M->Parameters, A, true, getTok().getLoc())) | ||||||
2824 | return true; | ||||||
2825 | |||||||
2826 | // We include the .endmacro in the buffer as our cue to exit the macro | ||||||
2827 | // instantiation. | ||||||
2828 | OS << ".endmacro\n"; | ||||||
2829 | |||||||
2830 | std::unique_ptr<MemoryBuffer> Instantiation = | ||||||
2831 | MemoryBuffer::getMemBufferCopy(OS.str(), "<instantiation>"); | ||||||
2832 | |||||||
2833 | // Create the macro instantiation object and add to the current macro | ||||||
2834 | // instantiation stack. | ||||||
2835 | MacroInstantiation *MI = new MacroInstantiation{ | ||||||
2836 | NameLoc, CurBuffer, getTok().getLoc(), TheCondStack.size()}; | ||||||
2837 | ActiveMacros.push_back(MI); | ||||||
2838 | |||||||
2839 | ++NumOfMacroInstantiations; | ||||||
2840 | |||||||
2841 | // Jump to the macro instantiation and prime the lexer. | ||||||
2842 | CurBuffer = SrcMgr.AddNewSourceBuffer(std::move(Instantiation), SMLoc()); | ||||||
2843 | Lexer.setBuffer(SrcMgr.getMemoryBuffer(CurBuffer)->getBuffer()); | ||||||
2844 | Lex(); | ||||||
2845 | |||||||
2846 | return false; | ||||||
2847 | } | ||||||
2848 | |||||||
2849 | void AsmParser::handleMacroExit() { | ||||||
2850 | // Jump to the EndOfStatement we should return to, and consume it. | ||||||
2851 | jumpToLoc(ActiveMacros.back()->ExitLoc, ActiveMacros.back()->ExitBuffer); | ||||||
2852 | Lex(); | ||||||
2853 | |||||||
2854 | // Pop the instantiation entry. | ||||||
2855 | delete ActiveMacros.back(); | ||||||
2856 | ActiveMacros.pop_back(); | ||||||
2857 | } | ||||||
2858 | |||||||
2859 | bool AsmParser::parseAssignment(StringRef Name, bool allow_redef, | ||||||
2860 | bool NoDeadStrip) { | ||||||
2861 | MCSymbol *Sym; | ||||||
2862 | const MCExpr *Value; | ||||||
2863 | if (MCParserUtils::parseAssignmentExpression(Name, allow_redef, *this, Sym, | ||||||
2864 | Value)) | ||||||
2865 | return true; | ||||||
2866 | |||||||
2867 | if (!Sym) { | ||||||
2868 | // In the case where we parse an expression starting with a '.', we will | ||||||
2869 | // not generate an error, nor will we create a symbol. In this case we | ||||||
2870 | // should just return out. | ||||||
2871 | return false; | ||||||
2872 | } | ||||||
2873 | |||||||
2874 | if (discardLTOSymbol(Name)) | ||||||
2875 | return false; | ||||||
2876 | |||||||
2877 | // Do the assignment. | ||||||
2878 | Out.emitAssignment(Sym, Value); | ||||||
2879 | if (NoDeadStrip) | ||||||
2880 | Out.emitSymbolAttribute(Sym, MCSA_NoDeadStrip); | ||||||
2881 | |||||||
2882 | return false; | ||||||
2883 | } | ||||||
2884 | |||||||
2885 | /// parseIdentifier: | ||||||
2886 | /// ::= identifier | ||||||
2887 | /// ::= string | ||||||
2888 | bool AsmParser::parseIdentifier(StringRef &Res) { | ||||||
2889 | // The assembler has relaxed rules for accepting identifiers, in particular we | ||||||
2890 | // allow things like '.globl $foo' and '.def @feat.00', which would normally be | ||||||
2891 | // separate tokens. At this level, we have already lexed so we cannot (currently) | ||||||
2892 | // handle this as a context dependent token, instead we detect adjacent tokens | ||||||
2893 | // and return the combined identifier. | ||||||
2894 | if (Lexer.is(AsmToken::Dollar) || Lexer.is(AsmToken::At)) { | ||||||
2895 | SMLoc PrefixLoc = getLexer().getLoc(); | ||||||
2896 | |||||||
2897 | // Consume the prefix character, and check for a following identifier. | ||||||
2898 | |||||||
2899 | AsmToken Buf[1]; | ||||||
2900 | Lexer.peekTokens(Buf, false); | ||||||
2901 | |||||||
2902 | if (Buf[0].isNot(AsmToken::Identifier) && Buf[0].isNot(AsmToken::Integer)) | ||||||
2903 | return true; | ||||||
2904 | |||||||
2905 | // We have a '$' or '@' followed by an identifier or integer token, make | ||||||
2906 | // sure they are adjacent. | ||||||
2907 | if (PrefixLoc.getPointer() + 1 != Buf[0].getLoc().getPointer()) | ||||||
2908 | return true; | ||||||
2909 | |||||||
2910 | // eat $ or @ | ||||||
2911 | Lexer.Lex(); // Lexer's Lex guarantees consecutive token. | ||||||
2912 | // Construct the joined identifier and consume the token. | ||||||
2913 | Res = StringRef(PrefixLoc.getPointer(), getTok().getString().size() + 1); | ||||||
2914 | Lex(); // Parser Lex to maintain invariants. | ||||||
2915 | return false; | ||||||
2916 | } | ||||||
2917 | |||||||
2918 | if (Lexer.isNot(AsmToken::Identifier) && Lexer.isNot(AsmToken::String)) | ||||||
2919 | return true; | ||||||
2920 | |||||||
2921 | Res = getTok().getIdentifier(); | ||||||
2922 | |||||||
2923 | Lex(); // Consume the identifier token. | ||||||
2924 | |||||||
2925 | return false; | ||||||
2926 | } | ||||||
2927 | |||||||
2928 | /// parseDirectiveSet: | ||||||
2929 | /// ::= .equ identifier ',' expression | ||||||
2930 | /// ::= .equiv identifier ',' expression | ||||||
2931 | /// ::= .set identifier ',' expression | ||||||
2932 | bool AsmParser::parseDirectiveSet(StringRef IDVal, bool allow_redef) { | ||||||
2933 | StringRef Name; | ||||||
2934 | if (check(parseIdentifier(Name), "expected identifier") || | ||||||
2935 | parseToken(AsmToken::Comma) || parseAssignment(Name, allow_redef, true)) | ||||||
2936 | return addErrorSuffix(" in '" + Twine(IDVal) + "' directive"); | ||||||
2937 | return false; | ||||||
2938 | } | ||||||
2939 | |||||||
2940 | bool AsmParser::parseEscapedString(std::string &Data) { | ||||||
2941 | if (check(getTok().isNot(AsmToken::String), "expected string")) | ||||||
2942 | return true; | ||||||
2943 | |||||||
2944 | Data = ""; | ||||||
2945 | StringRef Str = getTok().getStringContents(); | ||||||
2946 | for (unsigned i = 0, e = Str.size(); i != e; ++i) { | ||||||
2947 | if (Str[i] != '\\') { | ||||||
2948 | Data += Str[i]; | ||||||
2949 | continue; | ||||||
2950 | } | ||||||
2951 | |||||||
2952 | // Recognize escaped characters. Note that this escape semantics currently | ||||||
2953 | // loosely follows Darwin 'as'. | ||||||
2954 | ++i; | ||||||
2955 | if (i == e) | ||||||
2956 | return TokError("unexpected backslash at end of string"); | ||||||
2957 | |||||||
2958 | // Recognize hex sequences similarly to GNU 'as'. | ||||||
2959 | if (Str[i] == 'x' || Str[i] == 'X') { | ||||||
2960 | size_t length = Str.size(); | ||||||
2961 | if (i + 1 >= length || !isHexDigit(Str[i + 1])) | ||||||
2962 | return TokError("invalid hexadecimal escape sequence"); | ||||||
2963 | |||||||
2964 | // Consume hex characters. GNU 'as' reads all hexadecimal characters and | ||||||
2965 | // then truncates to the lower 16 bits. Seems reasonable. | ||||||
2966 | unsigned Value = 0; | ||||||
2967 | while (i + 1 < length && isHexDigit(Str[i + 1])) | ||||||
2968 | Value = Value * 16 + hexDigitValue(Str[++i]); | ||||||
2969 | |||||||
2970 | Data += (unsigned char)(Value & 0xFF); | ||||||
2971 | continue; | ||||||
2972 | } | ||||||
2973 | |||||||
2974 | // Recognize octal sequences. | ||||||
2975 | if ((unsigned)(Str[i] - '0') <= 7) { | ||||||
2976 | // Consume up to three octal characters. | ||||||
2977 | unsigned Value = Str[i] - '0'; | ||||||
2978 | |||||||
2979 | if (i + 1 != e && ((unsigned)(Str[i + 1] - '0')) <= 7) { | ||||||
2980 | ++i; | ||||||
2981 | Value = Value * 8 + (Str[i] - '0'); | ||||||
2982 | |||||||
2983 | if (i + 1 != e && ((unsigned)(Str[i + 1] - '0')) <= 7) { | ||||||
2984 | ++i; | ||||||
2985 | Value = Value * 8 + (Str[i] - '0'); | ||||||
2986 | } | ||||||
2987 | } | ||||||
2988 | |||||||
2989 | if (Value > 255) | ||||||
2990 | return TokError("invalid octal escape sequence (out of range)"); | ||||||
2991 | |||||||
2992 | Data += (unsigned char)Value; | ||||||
2993 | continue; | ||||||
2994 | } | ||||||
2995 | |||||||
2996 | // Otherwise recognize individual escapes. | ||||||
2997 | switch (Str[i]) { | ||||||
2998 | default: | ||||||
2999 | // Just reject invalid escape sequences for now. | ||||||
3000 | return TokError("invalid escape sequence (unrecognized character)"); | ||||||
3001 | |||||||
3002 | case 'b': Data += '\b'; break; | ||||||
3003 | case 'f': Data += '\f'; break; | ||||||
3004 | case 'n': Data += '\n'; break; | ||||||
3005 | case 'r': Data += '\r'; break; | ||||||
3006 | case 't': Data += '\t'; break; | ||||||
3007 | case '"': Data += '"'; break; | ||||||
3008 | case '\\': Data += '\\'; break; | ||||||
3009 | } | ||||||
3010 | } | ||||||
3011 | |||||||
3012 | Lex(); | ||||||
3013 | return false; | ||||||
3014 | } | ||||||
3015 | |||||||
3016 | bool AsmParser::parseAngleBracketString(std::string &Data) { | ||||||
3017 | SMLoc EndLoc, StartLoc = getTok().getLoc(); | ||||||
3018 | if (isAngleBracketString(StartLoc, EndLoc)) { | ||||||
3019 | const char *StartChar = StartLoc.getPointer() + 1; | ||||||
3020 | const char *EndChar = EndLoc.getPointer() - 1; | ||||||
3021 | jumpToLoc(EndLoc, CurBuffer); | ||||||
3022 | /// Eat from '<' to '>' | ||||||
3023 | Lex(); | ||||||
3024 | |||||||
3025 | Data = angleBracketString(StringRef(StartChar, EndChar - StartChar)); | ||||||
3026 | return false; | ||||||
3027 | } | ||||||
3028 | return true; | ||||||
3029 | } | ||||||
3030 | |||||||
3031 | /// parseDirectiveAscii: | ||||||
3032 | // ::= .ascii [ "string"+ ( , "string"+ )* ] | ||||||
3033 | /// ::= ( .asciz | .string ) [ "string" ( , "string" )* ] | ||||||
3034 | bool AsmParser::parseDirectiveAscii(StringRef IDVal, bool ZeroTerminated) { | ||||||
3035 | auto parseOp = [&]() -> bool { | ||||||
3036 | std::string Data; | ||||||
3037 | if (checkForValidSection()) | ||||||
3038 | return true; | ||||||
3039 | // Only support spaces as separators for .ascii directive for now. See the | ||||||
3040 | // discusssion at https://reviews.llvm.org/D91460 for more details. | ||||||
3041 | do { | ||||||
3042 | if (parseEscapedString(Data)) | ||||||
3043 | return true; | ||||||
3044 | getStreamer().emitBytes(Data); | ||||||
3045 | } while (!ZeroTerminated && getTok().is(AsmToken::String)); | ||||||
3046 | if (ZeroTerminated) | ||||||
3047 | getStreamer().emitBytes(StringRef("\0", 1)); | ||||||
3048 | return false; | ||||||
3049 | }; | ||||||
3050 | |||||||
3051 | if (parseMany(parseOp)) | ||||||
3052 | return addErrorSuffix(" in '" + Twine(IDVal) + "' directive"); | ||||||
3053 | return false; | ||||||
3054 | } | ||||||
3055 | |||||||
3056 | /// parseDirectiveReloc | ||||||
3057 | /// ::= .reloc expression , identifier [ , expression ] | ||||||
3058 | bool AsmParser::parseDirectiveReloc(SMLoc DirectiveLoc) { | ||||||
3059 | const MCExpr *Offset; | ||||||
3060 | const MCExpr *Expr = nullptr; | ||||||
3061 | SMLoc OffsetLoc = Lexer.getTok().getLoc(); | ||||||
3062 | |||||||
3063 | if (parseExpression(Offset)) | ||||||
3064 | return true; | ||||||
3065 | if (parseToken(AsmToken::Comma, "expected comma") || | ||||||
3066 | check(getTok().isNot(AsmToken::Identifier), "expected relocation name")) | ||||||
3067 | return true; | ||||||
3068 | |||||||
3069 | SMLoc NameLoc = Lexer.getTok().getLoc(); | ||||||
3070 | StringRef Name = Lexer.getTok().getIdentifier(); | ||||||
3071 | Lex(); | ||||||
3072 | |||||||
3073 | if (Lexer.is(AsmToken::Comma)) { | ||||||
3074 | Lex(); | ||||||
3075 | SMLoc ExprLoc = Lexer.getLoc(); | ||||||
3076 | if (parseExpression(Expr)) | ||||||
3077 | return true; | ||||||
3078 | |||||||
3079 | MCValue Value; | ||||||
3080 | if (!Expr->evaluateAsRelocatable(Value, nullptr, nullptr)) | ||||||
3081 | return Error(ExprLoc, "expression must be relocatable"); | ||||||
3082 | } | ||||||
3083 | |||||||
3084 | if (parseEOL()) | ||||||
3085 | return true; | ||||||
3086 | |||||||
3087 | const MCTargetAsmParser &MCT = getTargetParser(); | ||||||
3088 | const MCSubtargetInfo &STI = MCT.getSTI(); | ||||||
3089 | if (Optional<std::pair<bool, std::string>> Err = | ||||||
3090 | getStreamer().emitRelocDirective(*Offset, Name, Expr, DirectiveLoc, | ||||||
3091 | STI)) | ||||||
3092 | return Error(Err->first ? NameLoc : OffsetLoc, Err->second); | ||||||
3093 | |||||||
3094 | return false; | ||||||
3095 | } | ||||||
3096 | |||||||
3097 | /// parseDirectiveValue | ||||||
3098 | /// ::= (.byte | .short | ... ) [ expression (, expression)* ] | ||||||
3099 | bool AsmParser::parseDirectiveValue(StringRef IDVal, unsigned Size) { | ||||||
3100 | auto parseOp = [&]() -> bool { | ||||||
3101 | const MCExpr *Value; | ||||||
3102 | SMLoc ExprLoc = getLexer().getLoc(); | ||||||
3103 | if (checkForValidSection() || parseExpression(Value)) | ||||||
3104 | return true; | ||||||
3105 | // Special case constant expressions to match code generator. | ||||||
3106 | if (const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Value)) { | ||||||
3107 | assert(Size <= 8 && "Invalid size")((Size <= 8 && "Invalid size") ? static_cast<void > (0) : __assert_fail ("Size <= 8 && \"Invalid size\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/llvm/lib/MC/MCParser/AsmParser.cpp" , 3107, __PRETTY_FUNCTION__)); | ||||||
3108 | uint64_t IntValue = MCE->getValue(); | ||||||
3109 | if (!isUIntN(8 * Size, IntValue) && !isIntN(8 * Size, IntValue)) | ||||||
3110 | return Error(ExprLoc, "out of range literal value"); | ||||||
3111 | getStreamer().emitIntValue(IntValue, Size); | ||||||
3112 | } else | ||||||
3113 | getStreamer().emitValue(Value, Size, ExprLoc); | ||||||
3114 | return false; | ||||||
3115 | }; | ||||||
3116 | |||||||
3117 | if (parseMany(parseOp)) | ||||||
3118 | return addErrorSuffix(" in '" + Twine(IDVal) + "' directive"); | ||||||
3119 | return false; | ||||||
3120 | } | ||||||
3121 | |||||||
3122 | static bool parseHexOcta(AsmParser &Asm, uint64_t &hi, uint64_t &lo) { | ||||||
3123 | if (Asm.getTok().isNot(AsmToken::Integer) && | ||||||
3124 | Asm.getTok().isNot(AsmToken::BigNum)) | ||||||
3125 | return Asm.TokError("unknown token in expression"); | ||||||
3126 | SMLoc ExprLoc = Asm.getTok().getLoc(); | ||||||
3127 | APInt IntValue = Asm.getTok().getAPIntVal(); | ||||||
3128 | Asm.Lex(); | ||||||
3129 | if (!IntValue.isIntN(128)) | ||||||
3130 | return Asm.Error(ExprLoc, "out of range literal value"); | ||||||
3131 | if (!IntValue.isIntN(64)) { | ||||||
3132 | hi = IntValue.getHiBits(IntValue.getBitWidth() - 64).getZExtValue(); | ||||||
3133 | lo = IntValue.getLoBits(64).getZExtValue(); | ||||||
3134 | } else { | ||||||
3135 | hi = 0; | ||||||
3136 | lo = IntValue.getZExtValue(); | ||||||
3137 | } | ||||||
3138 | return false; | ||||||
3139 | } | ||||||
3140 | |||||||
3141 | /// ParseDirectiveOctaValue | ||||||
3142 | /// ::= .octa [ hexconstant (, hexconstant)* ] | ||||||
3143 | |||||||
3144 | bool AsmParser::parseDirectiveOctaValue(StringRef IDVal) { | ||||||
3145 | auto parseOp = [&]() -> bool { | ||||||
3146 | if (checkForValidSection()) | ||||||
3147 | return true; | ||||||
3148 | uint64_t hi, lo; | ||||||
3149 | if (parseHexOcta(*this, hi, lo)) | ||||||
3150 | return true; | ||||||
3151 | if (MAI.isLittleEndian()) { | ||||||
3152 | getStreamer().emitInt64(lo); | ||||||
3153 | getStreamer().emitInt64(hi); | ||||||
3154 | } else { | ||||||
3155 | getStreamer().emitInt64(hi); | ||||||
3156 | getStreamer().emitInt64(lo); | ||||||
3157 | } | ||||||
3158 | return false; | ||||||
3159 | }; | ||||||
3160 | |||||||
3161 | if (parseMany(parseOp)) | ||||||
3162 | return addErrorSuffix(" in '" + Twine(IDVal) + "' directive"); | ||||||
3163 | return false; | ||||||
3164 | } | ||||||
3165 | |||||||
3166 | bool AsmParser::parseRealValue(const fltSemantics &Semantics, APInt &Res) { | ||||||
3167 | // We don't truly support arithmetic on floating point expressions, so we | ||||||
3168 | // have to manually parse unary prefixes. | ||||||
3169 | bool IsNeg = false; | ||||||
3170 | if (getLexer().is(AsmToken::Minus)) { | ||||||
3171 | Lexer.Lex(); | ||||||
3172 | IsNeg = true; | ||||||
3173 | } else if (getLexer().is(AsmToken::Plus)) | ||||||
3174 | Lexer.Lex(); | ||||||
3175 | |||||||
3176 | if (Lexer.is(AsmToken::Error)) | ||||||
3177 | return TokError(Lexer.getErr()); | ||||||
3178 | if (Lexer.isNot(AsmToken::Integer) && Lexer.isNot(AsmToken::Real) && | ||||||
3179 | Lexer.isNot(AsmToken::Identifier)) | ||||||
3180 | return TokError("unexpected token in directive"); | ||||||
3181 | |||||||
3182 | // Convert to an APFloat. | ||||||
3183 | APFloat Value(Semantics); | ||||||
3184 | StringRef IDVal = getTok().getString(); | ||||||
3185 | if (getLexer().is(AsmToken::Identifier)) { | ||||||
3186 | if (!IDVal.compare_lower("infinity") || !IDVal.compare_lower("inf")) | ||||||
3187 | Value = APFloat::getInf(Semantics); | ||||||
3188 | else if (!IDVal.compare_lower("nan")) | ||||||
3189 | Value = APFloat::getNaN(Semantics, false, ~0); | ||||||
3190 | else | ||||||
3191 | return TokError("invalid floating point literal"); | ||||||
3192 | } else if (errorToBool( | ||||||
3193 | Value.convertFromString(IDVal, APFloat::rmNearestTiesToEven) | ||||||
3194 | .takeError())) | ||||||
3195 | return TokError("invalid floating point literal"); | ||||||
3196 | if (IsNeg) | ||||||
3197 | Value.changeSign(); | ||||||
3198 | |||||||
3199 | // Consume the numeric token. | ||||||
3200 | Lex(); | ||||||
3201 | |||||||
3202 | Res = Value.bitcastToAPInt(); | ||||||
3203 | |||||||
3204 | return false; | ||||||
3205 | } | ||||||
3206 | |||||||
3207 | /// parseDirectiveRealValue | ||||||
3208 | /// ::= (.single | .double) [ expression (, expression)* ] | ||||||
3209 | bool AsmParser::parseDirectiveRealValue(StringRef IDVal, | ||||||
3210 | const fltSemantics &Semantics) { | ||||||
3211 | auto parseOp = [&]() -> bool { | ||||||
3212 | APInt AsInt; | ||||||
3213 | if (checkForValidSection() || parseRealValue(Semantics, AsInt)) | ||||||
3214 | return true; | ||||||
3215 | getStreamer().emitIntValue(AsInt.getLimitedValue(), | ||||||
3216 | AsInt.getBitWidth() / 8); | ||||||
3217 | return false; | ||||||
3218 | }; | ||||||
3219 | |||||||
3220 | if (parseMany(parseOp)) | ||||||
3221 | return addErrorSuffix(" in '" + Twine(IDVal) + "' directive"); | ||||||
3222 | return false; | ||||||
3223 | } | ||||||
3224 | |||||||
3225 | /// parseDirectiveZero | ||||||
3226 | /// ::= .zero expression | ||||||
3227 | bool AsmParser::parseDirectiveZero() { | ||||||
3228 | SMLoc NumBytesLoc = Lexer.getLoc(); | ||||||
3229 | const MCExpr *NumBytes; | ||||||
3230 | if (checkForValidSection() || parseExpression(NumBytes)) | ||||||
3231 | return true; | ||||||
3232 | |||||||
3233 | int64_t Val = 0; | ||||||
3234 | if (getLexer().is(AsmToken::Comma)) { | ||||||
3235 | Lex(); | ||||||
3236 | if (parseAbsoluteExpression(Val)) | ||||||
3237 | return true; | ||||||
3238 | } | ||||||
3239 | |||||||
3240 | if (parseEOL()) | ||||||
3241 | return true; | ||||||
3242 | getStreamer().emitFill(*NumBytes, Val, NumBytesLoc); | ||||||
3243 | |||||||
3244 | return false; | ||||||
3245 | } | ||||||
3246 | |||||||
3247 | /// parseDirectiveFill | ||||||
3248 | /// ::= .fill expression [ , expression [ , expression ] ] | ||||||
3249 | bool AsmParser::parseDirectiveFill() { | ||||||
3250 | SMLoc NumValuesLoc = Lexer.getLoc(); | ||||||
3251 | const MCExpr *NumValues; | ||||||
3252 | if (checkForValidSection() || parseExpression(NumValues)) | ||||||
3253 | return true; | ||||||
3254 | |||||||
3255 | int64_t FillSize = 1; | ||||||
3256 | int64_t FillExpr = 0; | ||||||
3257 | |||||||
3258 | SMLoc SizeLoc, ExprLoc; | ||||||
3259 | |||||||
3260 | if (parseOptionalToken(AsmToken::Comma)) { | ||||||
3261 | SizeLoc = getTok().getLoc(); | ||||||
3262 | if (parseAbsoluteExpression(FillSize)) | ||||||
3263 | return true; | ||||||
3264 | if (parseOptionalToken(AsmToken::Comma)) { | ||||||
3265 | ExprLoc = getTok().getLoc(); | ||||||
3266 | if (parseAbsoluteExpression(FillExpr)) | ||||||
3267 | return true; | ||||||
3268 | } | ||||||
3269 | } | ||||||
3270 | if (parseEOL()) | ||||||
3271 | return true; | ||||||
3272 | |||||||
3273 | if (FillSize < 0) { | ||||||
3274 | Warning(SizeLoc, "'.fill' directive with negative size has no effect"); | ||||||
3275 | return false; | ||||||
3276 | } | ||||||
3277 | if (FillSize > 8) { | ||||||
3278 | Warning(SizeLoc, "'.fill' directive with size greater than 8 has been truncated to 8"); | ||||||
3279 | FillSize = 8; | ||||||
3280 | } | ||||||
3281 | |||||||
3282 | if (!isUInt<32>(FillExpr) && FillSize > 4) | ||||||
3283 | Warning(ExprLoc, "'.fill' directive pattern has been truncated to 32-bits"); | ||||||
3284 | |||||||
3285 | getStreamer().emitFill(*NumValues, FillSize, FillExpr, NumValuesLoc); | ||||||
3286 | |||||||
3287 | return false; | ||||||
3288 | } | ||||||
3289 | |||||||
3290 | /// parseDirectiveOrg | ||||||
3291 | /// ::= .org expression [ , expression ] | ||||||
3292 | bool AsmParser::parseDirectiveOrg() { | ||||||
3293 | const MCExpr *Offset; | ||||||
3294 | SMLoc OffsetLoc = Lexer.getLoc(); | ||||||
3295 | if (checkForValidSection() || parseExpression(Offset)) | ||||||
3296 | return true; | ||||||
3297 | |||||||
3298 | // Parse optional fill expression. | ||||||
3299 | int64_t FillExpr = 0; | ||||||
3300 | if (parseOptionalToken(AsmToken::Comma)) | ||||||
3301 | if (parseAbsoluteExpression(FillExpr)) | ||||||
3302 | return addErrorSuffix(" in '.org' directive"); | ||||||
3303 | if (parseEOL()) | ||||||
3304 | return addErrorSuffix(" in '.org' directive"); | ||||||
3305 | |||||||
3306 | getStreamer().emitValueToOffset(Offset, FillExpr, OffsetLoc); | ||||||
3307 | return false; | ||||||
3308 | } | ||||||
3309 | |||||||
3310 | /// parseDirectiveAlign | ||||||
3311 | /// ::= {.align, ...} expression [ , expression [ , expression ]] | ||||||
3312 | bool AsmParser::parseDirectiveAlign(bool IsPow2, unsigned ValueSize) { | ||||||
3313 | SMLoc AlignmentLoc = getLexer().getLoc(); | ||||||
3314 | int64_t Alignment; | ||||||
3315 | SMLoc MaxBytesLoc; | ||||||
3316 | bool HasFillExpr = false; | ||||||
3317 | int64_t FillExpr = 0; | ||||||
3318 | int64_t MaxBytesToFill = 0; | ||||||
3319 | |||||||
3320 | auto parseAlign = [&]() -> bool { | ||||||
3321 | if (parseAbsoluteExpression(Alignment)) | ||||||
3322 | return true; | ||||||
3323 | if (parseOptionalToken(AsmToken::Comma)) { | ||||||
3324 | // The fill expression can be omitted while specifying a maximum number of | ||||||
3325 | // alignment bytes, e.g: | ||||||
3326 | // .align 3,,4 | ||||||
3327 | if (getTok().isNot(AsmToken::Comma)) { | ||||||
3328 | HasFillExpr = true; | ||||||
3329 | if (parseAbsoluteExpression(FillExpr)) | ||||||
3330 | return true; | ||||||
3331 | } | ||||||
3332 | if (parseOptionalToken(AsmToken::Comma)) | ||||||
3333 | if (parseTokenLoc(MaxBytesLoc) || | ||||||
3334 | parseAbsoluteExpression(MaxBytesToFill)) | ||||||
3335 | return true; | ||||||
3336 | } | ||||||
3337 | return parseEOL(); | ||||||
3338 | }; | ||||||
3339 | |||||||
3340 | if (checkForValidSection()) | ||||||
3341 | return addErrorSuffix(" in directive"); | ||||||
3342 | // Ignore empty '.p2align' directives for GNU-as compatibility | ||||||
3343 | if (IsPow2 && (ValueSize == 1) && getTok().is(AsmToken::EndOfStatement)) { | ||||||
3344 | Warning(AlignmentLoc, "p2align directive with no operand(s) is ignored"); | ||||||
3345 | return parseEOL(); | ||||||
3346 | } | ||||||
3347 | if (parseAlign()) | ||||||
3348 | return addErrorSuffix(" in directive"); | ||||||
3349 | |||||||
3350 | // Always emit an alignment here even if we thrown an error. | ||||||
3351 | bool ReturnVal = false; | ||||||
3352 | |||||||
3353 | // Compute alignment in bytes. | ||||||
3354 | if (IsPow2) { | ||||||
3355 | // FIXME: Diagnose overflow. | ||||||
3356 | if (Alignment >= 32) { | ||||||
3357 | ReturnVal |= Error(AlignmentLoc, "invalid alignment value"); | ||||||
3358 | Alignment = 31; | ||||||
3359 | } | ||||||
3360 | |||||||
3361 | Alignment = 1ULL << Alignment; | ||||||
3362 | } else { | ||||||
3363 | // Reject alignments that aren't either a power of two or zero, | ||||||
3364 | // for gas compatibility. Alignment of zero is silently rounded | ||||||
3365 | // up to one. | ||||||
3366 | if (Alignment == 0) | ||||||
3367 | Alignment = 1; | ||||||
3368 | if (!isPowerOf2_64(Alignment)) | ||||||
3369 | ReturnVal |= Error(AlignmentLoc, "alignment must be a power of 2"); | ||||||
3370 | if (!isUInt<32>(Alignment)) | ||||||
3371 | ReturnVal |= Error(AlignmentLoc, "alignment must be smaller than 2**32"); | ||||||
3372 | } | ||||||
3373 | |||||||
3374 | // Diagnose non-sensical max bytes to align. | ||||||
3375 | if (MaxBytesLoc.isValid()) { | ||||||
3376 | if (MaxBytesToFill < 1) { | ||||||
3377 | ReturnVal |= Error(MaxBytesLoc, | ||||||
3378 | "alignment directive can never be satisfied in this " | ||||||
3379 | "many bytes, ignoring maximum bytes expression"); | ||||||
3380 | MaxBytesToFill = 0; | ||||||
3381 | } | ||||||
3382 | |||||||
3383 | if (MaxBytesToFill >= Alignment) { | ||||||
3384 | Warning(MaxBytesLoc, "maximum bytes expression exceeds alignment and " | ||||||
3385 | "has no effect"); | ||||||
3386 | MaxBytesToFill = 0; | ||||||
3387 | } | ||||||
3388 | } | ||||||
3389 | |||||||
3390 | // Check whether we should use optimal code alignment for this .align | ||||||
3391 | // directive. | ||||||
3392 | const MCSection *Section = getStreamer().getCurrentSectionOnly(); | ||||||
3393 | 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~++20210405022414+5f57793c4fe4/llvm/lib/MC/MCParser/AsmParser.cpp" , 3393, __PRETTY_FUNCTION__)); | ||||||
3394 | bool UseCodeAlign = Section->UseCodeAlign(); | ||||||
3395 | if ((!HasFillExpr || Lexer.getMAI().getTextAlignFillValue() == FillExpr) && | ||||||
3396 | ValueSize == 1 && UseCodeAlign) { | ||||||
3397 | getStreamer().emitCodeAlignment(Alignment, MaxBytesToFill); | ||||||
3398 | } else { | ||||||
3399 | // FIXME: Target specific behavior about how the "extra" bytes are filled. | ||||||
3400 | getStreamer().emitValueToAlignment(Alignment, FillExpr, ValueSize, | ||||||
3401 | MaxBytesToFill); | ||||||
3402 | } | ||||||
3403 | |||||||
3404 | return ReturnVal; | ||||||
3405 | } | ||||||
3406 | |||||||
3407 | /// parseDirectiveFile | ||||||
3408 | /// ::= .file filename | ||||||
3409 | /// ::= .file number [directory] filename [md5 checksum] [source source-text] | ||||||
3410 | bool AsmParser::parseDirectiveFile(SMLoc DirectiveLoc) { | ||||||
3411 | // FIXME: I'm not sure what this is. | ||||||
3412 | int64_t FileNumber = -1; | ||||||
3413 | if (getLexer().is(AsmToken::Integer)) { | ||||||
3414 | FileNumber = getTok().getIntVal(); | ||||||
3415 | Lex(); | ||||||
3416 | |||||||
3417 | if (FileNumber < 0) | ||||||
3418 | return TokError("negative file number"); | ||||||
3419 | } | ||||||
3420 | |||||||
3421 | std::string Path; | ||||||
3422 | |||||||
3423 | // Usually the directory and filename together, otherwise just the directory. | ||||||
3424 | // Allow the strings to have escaped octal character sequence. | ||||||
3425 | if (check(getTok().isNot(AsmToken::String), | ||||||
3426 | "unexpected token in '.file' directive") || | ||||||
3427 | parseEscapedString(Path)) | ||||||
3428 | return true; | ||||||
3429 | |||||||
3430 | StringRef Directory; | ||||||
3431 | StringRef Filename; | ||||||
3432 | std::string FilenameData; | ||||||
3433 | if (getLexer().is(AsmToken::String)) { | ||||||
3434 | if (check(FileNumber == -1, | ||||||
3435 | "explicit path specified, but no file number") || | ||||||
3436 | parseEscapedString(FilenameData)) | ||||||
3437 | return true; | ||||||
3438 | Filename = FilenameData; | ||||||
3439 | Directory = Path; | ||||||
3440 | } else { | ||||||
3441 | Filename = Path; | ||||||
3442 | } | ||||||
3443 | |||||||
3444 | uint64_t MD5Hi, MD5Lo; | ||||||
3445 | bool HasMD5 = false; | ||||||
3446 | |||||||
3447 | Optional<StringRef> Source; | ||||||
3448 | bool HasSource = false; | ||||||
3449 | std::string SourceString; | ||||||
3450 | |||||||
3451 | while (!parseOptionalToken(AsmToken::EndOfStatement)) { | ||||||
3452 | StringRef Keyword; | ||||||
3453 | if (check(getTok().isNot(AsmToken::Identifier), | ||||||
3454 | "unexpected token in '.file' directive") || | ||||||
3455 | parseIdentifier(Keyword)) | ||||||
3456 | return true; | ||||||
3457 | if (Keyword == "md5") { | ||||||
3458 | HasMD5 = true; | ||||||
3459 | if (check(FileNumber == -1, | ||||||
3460 | "MD5 checksum specified, but no file number") || | ||||||
3461 | parseHexOcta(*this, MD5Hi, MD5Lo)) | ||||||
3462 | return true; | ||||||
3463 | } else if (Keyword == "source") { | ||||||
3464 | HasSource = true; | ||||||
3465 | if (check(FileNumber == -1, | ||||||
3466 | "source specified, but no file number") || | ||||||
3467 | check(getTok().isNot(AsmToken::String), | ||||||
3468 | "unexpected token in '.file' directive") || | ||||||
3469 | parseEscapedString(SourceString)) | ||||||
3470 | return true; | ||||||
3471 | } else { | ||||||
3472 | return TokError("unexpected token in '.file' directive"); | ||||||
3473 | } | ||||||
3474 | } | ||||||
3475 | |||||||
3476 | if (FileNumber == -1) { | ||||||
3477 | // Ignore the directive if there is no number and the target doesn't support | ||||||
3478 | // numberless .file directives. This allows some portability of assembler | ||||||
3479 | // between different object file formats. | ||||||
3480 | if (getContext().getAsmInfo()->hasSingleParameterDotFile()) | ||||||
3481 | getStreamer().emitFileDirective(Filename); | ||||||
3482 | } else { | ||||||
3483 | // In case there is a -g option as well as debug info from directive .file, | ||||||
3484 | // we turn off the -g option, directly use the existing debug info instead. | ||||||
3485 | // Throw away any implicit file table for the assembler source. | ||||||
3486 | if (Ctx.getGenDwarfForAssembly()) { | ||||||
3487 | Ctx.getMCDwarfLineTable(0).resetFileTable(); | ||||||
3488 | Ctx.setGenDwarfForAssembly(false); | ||||||
3489 | } | ||||||
3490 | |||||||
3491 | Optional<MD5::MD5Result> CKMem; | ||||||
3492 | if (HasMD5) { | ||||||
3493 | MD5::MD5Result Sum; | ||||||
3494 | for (unsigned i = 0; i != 8; ++i) { | ||||||
3495 | Sum.Bytes[i] = uint8_t(MD5Hi >> ((7 - i) * 8)); | ||||||
3496 | Sum.Bytes[i + 8] = uint8_t(MD5Lo >> ((7 - i) * 8)); | ||||||
3497 | } | ||||||
3498 | CKMem = Sum; | ||||||
3499 | } | ||||||
3500 | if (HasSource) { | ||||||
3501 | char *SourceBuf = static_cast<char *>(Ctx.allocate(SourceString.size())); | ||||||
3502 | memcpy(SourceBuf, SourceString.data(), SourceString.size()); | ||||||
3503 | Source = StringRef(SourceBuf, SourceString.size()); | ||||||
3504 | } | ||||||
3505 | if (FileNumber == 0) { | ||||||
3506 | // Upgrade to Version 5 for assembly actions like clang -c a.s. | ||||||
3507 | if (Ctx.getDwarfVersion() < 5) | ||||||
3508 | Ctx.setDwarfVersion(5); | ||||||
3509 | getStreamer().emitDwarfFile0Directive(Directory, Filename, CKMem, Source); | ||||||
3510 | } else { | ||||||
3511 | Expected<unsigned> FileNumOrErr = getStreamer().tryEmitDwarfFileDirective( | ||||||
3512 | FileNumber, Directory, Filename, CKMem, Source); | ||||||
3513 | if (!FileNumOrErr) | ||||||
3514 | return Error(DirectiveLoc, toString(FileNumOrErr.takeError())); | ||||||
3515 | } | ||||||
3516 | // Alert the user if there are some .file directives with MD5 and some not. | ||||||
3517 | // But only do that once. | ||||||
3518 | if (!ReportedInconsistentMD5 && !Ctx.isDwarfMD5UsageConsistent(0)) { | ||||||
3519 | ReportedInconsistentMD5 = true; | ||||||
3520 | return Warning(DirectiveLoc, "inconsistent use of MD5 checksums"); | ||||||
3521 | } | ||||||
3522 | } | ||||||
3523 | |||||||
3524 | return false; | ||||||
3525 | } | ||||||
3526 | |||||||
3527 | /// parseDirectiveLine | ||||||
3528 | /// ::= .line [number] | ||||||
3529 | bool AsmParser::parseDirectiveLine() { | ||||||
3530 | int64_t LineNumber; | ||||||
3531 | if (getLexer().is(AsmToken::Integer)) { | ||||||
3532 | if (parseIntToken(LineNumber, "unexpected token in '.line' directive")) | ||||||
3533 | return true; | ||||||
3534 | (void)LineNumber; | ||||||
3535 | // FIXME: Do something with the .line. | ||||||
3536 | } | ||||||
3537 | return parseEOL(); | ||||||
3538 | } | ||||||
3539 | |||||||
3540 | /// parseDirectiveLoc | ||||||
3541 | /// ::= .loc FileNumber [LineNumber] [ColumnPos] [basic_block] [prologue_end] | ||||||
3542 | /// [epilogue_begin] [is_stmt VALUE] [isa VALUE] | ||||||
3543 | /// The first number is a file number, must have been previously assigned with | ||||||
3544 | /// a .file directive, the second number is the line number and optionally the | ||||||
3545 | /// third number is a column position (zero if not specified). The remaining | ||||||
3546 | /// optional items are .loc sub-directives. | ||||||
3547 | bool AsmParser::parseDirectiveLoc() { | ||||||
3548 | int64_t FileNumber = 0, LineNumber = 0; | ||||||
3549 | SMLoc Loc = getTok().getLoc(); | ||||||
3550 | if (parseIntToken(FileNumber, "unexpected token in '.loc' directive") || | ||||||
3551 | check(FileNumber < 1 && Ctx.getDwarfVersion() < 5, Loc, | ||||||
3552 | "file number less than one in '.loc' directive") || | ||||||
3553 | check(!getContext().isValidDwarfFileNumber(FileNumber), Loc, | ||||||
3554 | "unassigned file number in '.loc' directive")) | ||||||
3555 | return true; | ||||||
3556 | |||||||
3557 | // optional | ||||||
3558 | if (getLexer().is(AsmToken::Integer)) { | ||||||
3559 | LineNumber = getTok().getIntVal(); | ||||||
3560 | if (LineNumber < 0) | ||||||
3561 | return TokError("line number less than zero in '.loc' directive"); | ||||||
3562 | Lex(); | ||||||
3563 | } | ||||||
3564 | |||||||
3565 | int64_t ColumnPos = 0; | ||||||
3566 | if (getLexer().is(AsmToken::Integer)) { | ||||||
3567 | ColumnPos = getTok().getIntVal(); | ||||||
3568 | if (ColumnPos < 0) | ||||||
3569 | return TokError("column position less than zero in '.loc' directive"); | ||||||
3570 | Lex(); | ||||||
3571 | } | ||||||
3572 | |||||||
3573 | auto PrevFlags = getContext().getCurrentDwarfLoc().getFlags(); | ||||||
3574 | unsigned Flags = PrevFlags & DWARF2_FLAG_IS_STMT(1 << 0); | ||||||
3575 | unsigned Isa = 0; | ||||||
3576 | int64_t Discriminator = 0; | ||||||
3577 | |||||||
3578 | auto parseLocOp = [&]() -> bool { | ||||||
3579 | StringRef Name; | ||||||
3580 | SMLoc Loc = getTok().getLoc(); | ||||||
3581 | if (parseIdentifier(Name)) | ||||||
3582 | return TokError("unexpected token in '.loc' directive"); | ||||||
3583 | |||||||
3584 | if (Name == "basic_block") | ||||||
3585 | Flags |= DWARF2_FLAG_BASIC_BLOCK(1 << 1); | ||||||
3586 | else if (Name == "prologue_end") | ||||||
3587 | Flags |= DWARF2_FLAG_PROLOGUE_END(1 << 2); | ||||||
3588 | else if (Name == "epilogue_begin") | ||||||
3589 | Flags |= DWARF2_FLAG_EPILOGUE_BEGIN(1 << 3); | ||||||
3590 | else if (Name == "is_stmt") { | ||||||
3591 | Loc = getTok().getLoc(); | ||||||
3592 | const MCExpr *Value; | ||||||
3593 | if (parseExpression(Value)) | ||||||
3594 | return true; | ||||||
3595 | // The expression must be the constant 0 or 1. | ||||||
3596 | if (const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Value)) { | ||||||
3597 | int Value = MCE->getValue(); | ||||||
3598 | if (Value == 0) | ||||||
3599 | Flags &= ~DWARF2_FLAG_IS_STMT(1 << 0); | ||||||
3600 | else if (Value == 1) | ||||||
3601 | Flags |= DWARF2_FLAG_IS_STMT(1 << 0); | ||||||
3602 | else | ||||||
3603 | return Error(Loc, "is_stmt value not 0 or 1"); | ||||||
3604 | } else { | ||||||
3605 | return Error(Loc, "is_stmt value not the constant value of 0 or 1"); | ||||||
3606 | } | ||||||
3607 | } else if (Name == "isa") { | ||||||
3608 | Loc = getTok().getLoc(); | ||||||
3609 | const MCExpr *Value; | ||||||
3610 | if (parseExpression(Value)) | ||||||
3611 | return true; | ||||||
3612 | // The expression must be a constant greater or equal to 0. | ||||||
3613 | if (const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Value)) { | ||||||
3614 | int Value = MCE->getValue(); | ||||||
3615 | if (Value < 0) | ||||||
3616 | return Error(Loc, "isa number less than zero"); | ||||||
3617 | Isa = Value; | ||||||
3618 | } else { | ||||||
3619 | return Error(Loc, "isa number not a constant value"); | ||||||
3620 | } | ||||||
3621 | } else if (Name == "discriminator") { | ||||||
3622 | if (parseAbsoluteExpression(Discriminator)) | ||||||
3623 | return true; | ||||||
3624 | } else { | ||||||
3625 | return Error(Loc, "unknown sub-directive in '.loc' directive"); | ||||||
3626 | } | ||||||
3627 | return false; | ||||||
3628 | }; | ||||||
3629 | |||||||
3630 | if (parseMany(parseLocOp, false /*hasComma*/)) | ||||||
3631 | return true; | ||||||
3632 | |||||||
3633 | getStreamer().emitDwarfLocDirective(FileNumber, LineNumber, ColumnPos, Flags, | ||||||
3634 | Isa, Discriminator, StringRef()); | ||||||
3635 | |||||||
3636 | return false; | ||||||
3637 | } | ||||||
3638 | |||||||
3639 | /// parseDirectiveStabs | ||||||
3640 | /// ::= .stabs string, number, number, number | ||||||
3641 | bool AsmParser::parseDirectiveStabs() { | ||||||
3642 | return TokError("unsupported directive '.stabs'"); | ||||||
3643 | } | ||||||
3644 | |||||||
3645 | /// parseDirectiveCVFile | ||||||
3646 | /// ::= .cv_file number filename [checksum] [checksumkind] | ||||||
3647 | bool AsmParser::parseDirectiveCVFile() { | ||||||
3648 | SMLoc FileNumberLoc = getTok().getLoc(); | ||||||
3649 | int64_t FileNumber; | ||||||
3650 | std::string Filename; | ||||||
3651 | std::string Checksum; | ||||||
3652 | int64_t ChecksumKind = 0; | ||||||
3653 | |||||||
3654 | if (parseIntToken(FileNumber, | ||||||
3655 | "expected file number in '.cv_file' directive") || | ||||||
3656 | check(FileNumber < 1, FileNumberLoc, "file number less than one") || | ||||||
3657 | check(getTok().isNot(AsmToken::String), | ||||||
3658 | "unexpected token in '.cv_file' directive") || | ||||||
3659 | parseEscapedString(Filename)) | ||||||
3660 | return true; | ||||||
3661 | if (!parseOptionalToken(AsmToken::EndOfStatement)) { | ||||||
3662 | if (check(getTok().isNot(AsmToken::String), | ||||||
3663 | "unexpected token in '.cv_file' directive") || | ||||||
3664 | parseEscapedString(Checksum) || | ||||||
3665 | parseIntToken(ChecksumKind, | ||||||
3666 | "expected checksum kind in '.cv_file' directive") || | ||||||
3667 | parseToken(AsmToken::EndOfStatement, | ||||||
3668 | "unexpected token in '.cv_file' directive")) | ||||||
3669 | return true; | ||||||
3670 | } | ||||||
3671 | |||||||
3672 | Checksum = fromHex(Checksum); | ||||||
3673 | void *CKMem = Ctx.allocate(Checksum.size(), 1); | ||||||
3674 | memcpy(CKMem, Checksum.data(), Checksum.size()); | ||||||
3675 | ArrayRef<uint8_t> ChecksumAsBytes(reinterpret_cast<const uint8_t *>(CKMem), | ||||||
3676 | Checksum.size()); | ||||||
3677 | |||||||
3678 | if (!getStreamer().EmitCVFileDirective(FileNumber, Filename, ChecksumAsBytes, | ||||||
3679 | static_cast<uint8_t>(ChecksumKind))) | ||||||
3680 | return Error(FileNumberLoc, "file number already allocated"); | ||||||
3681 | |||||||
3682 | return false; | ||||||
3683 | } | ||||||
3684 | |||||||
3685 | bool AsmParser::parseCVFunctionId(int64_t &FunctionId, | ||||||
3686 | StringRef DirectiveName) { | ||||||
3687 | SMLoc Loc; | ||||||
3688 | return parseTokenLoc(Loc) || | ||||||
3689 | parseIntToken(FunctionId, "expected function id in '" + DirectiveName + | ||||||
3690 | "' directive") || | ||||||
3691 | check(FunctionId < 0 || FunctionId >= UINT_MAX(2147483647 *2U +1U), Loc, | ||||||
3692 | "expected function id within range [0, UINT_MAX)"); | ||||||
3693 | } | ||||||
3694 | |||||||
3695 | bool AsmParser::parseCVFileId(int64_t &FileNumber, StringRef DirectiveName) { | ||||||
3696 | SMLoc Loc; | ||||||
3697 | return parseTokenLoc(Loc) || | ||||||
3698 | parseIntToken(FileNumber, "expected integer in '" + DirectiveName + | ||||||
3699 | "' directive") || | ||||||
3700 | check(FileNumber < 1, Loc, "file number less than one in '" + | ||||||
3701 | DirectiveName + "' directive") || | ||||||
3702 | check(!getCVContext().isValidFileNumber(FileNumber), Loc, | ||||||
3703 | "unassigned file number in '" + DirectiveName + "' directive"); | ||||||
3704 | } | ||||||
3705 | |||||||
3706 | /// parseDirectiveCVFuncId | ||||||
3707 | /// ::= .cv_func_id FunctionId | ||||||
3708 | /// | ||||||
3709 | /// Introduces a function ID that can be used with .cv_loc. | ||||||
3710 | bool AsmParser::parseDirectiveCVFuncId() { | ||||||
3711 | SMLoc FunctionIdLoc = getTok().getLoc(); | ||||||
3712 | int64_t FunctionId; | ||||||
3713 | |||||||
3714 | if (parseCVFunctionId(FunctionId, ".cv_func_id") || | ||||||
3715 | parseToken(AsmToken::EndOfStatement, | ||||||
3716 | "unexpected token in '.cv_func_id' directive")) | ||||||
3717 | return true; | ||||||
3718 | |||||||
3719 | if (!getStreamer().EmitCVFuncIdDirective(FunctionId)) | ||||||
3720 | return Error(FunctionIdLoc, "function id already allocated"); | ||||||
3721 | |||||||
3722 | return false; | ||||||
3723 | } | ||||||
3724 | |||||||
3725 | /// parseDirectiveCVInlineSiteId | ||||||
3726 | /// ::= .cv_inline_site_id FunctionId | ||||||
3727 | /// "within" IAFunc | ||||||
3728 | /// "inlined_at" IAFile IALine [IACol] | ||||||
3729 | /// | ||||||
3730 | /// Introduces a function ID that can be used with .cv_loc. Includes "inlined | ||||||
3731 | /// at" source location information for use in the line table of the caller, | ||||||
3732 | /// whether the caller is a real function or another inlined call site. | ||||||
3733 | bool AsmParser::parseDirectiveCVInlineSiteId() { | ||||||
3734 | SMLoc FunctionIdLoc = getTok().getLoc(); | ||||||
3735 | int64_t FunctionId; | ||||||
3736 | int64_t IAFunc; | ||||||
3737 | int64_t IAFile; | ||||||
3738 | int64_t IALine; | ||||||
3739 | int64_t IACol = 0; | ||||||
3740 | |||||||
3741 | // FunctionId | ||||||
3742 | if (parseCVFunctionId(FunctionId, ".cv_inline_site_id")) | ||||||
3743 | return true; | ||||||
3744 | |||||||
3745 | // "within" | ||||||
3746 | if (check((getLexer().isNot(AsmToken::Identifier) || | ||||||
3747 | getTok().getIdentifier() != "within"), | ||||||
3748 | "expected 'within' identifier in '.cv_inline_site_id' directive")) | ||||||
3749 | return true; | ||||||
3750 | Lex(); | ||||||
3751 | |||||||
3752 | // IAFunc | ||||||
3753 | if (parseCVFunctionId(IAFunc, ".cv_inline_site_id")) | ||||||
3754 | return true; | ||||||
3755 | |||||||
3756 | // "inlined_at" | ||||||
3757 | if (check((getLexer().isNot(AsmToken::Identifier) || | ||||||
3758 | getTok().getIdentifier() != "inlined_at"), | ||||||
3759 | "expected 'inlined_at' identifier in '.cv_inline_site_id' " | ||||||
3760 | "directive") ) | ||||||
3761 | return true; | ||||||
3762 | Lex(); | ||||||
3763 | |||||||
3764 | // IAFile IALine | ||||||
3765 | if (parseCVFileId(IAFile, ".cv_inline_site_id") || | ||||||
3766 | parseIntToken(IALine, "expected line number after 'inlined_at'")) | ||||||
3767 | return true; | ||||||
3768 | |||||||
3769 | // [IACol] | ||||||
3770 | if (getLexer().is(AsmToken::Integer)) { | ||||||
3771 | IACol = getTok().getIntVal(); | ||||||
3772 | Lex(); | ||||||
3773 | } | ||||||
3774 | |||||||
3775 | if (parseToken(AsmToken::EndOfStatement, | ||||||
3776 | "unexpected token in '.cv_inline_site_id' directive")) | ||||||
3777 | return true; | ||||||
3778 | |||||||
3779 | if (!getStreamer().EmitCVInlineSiteIdDirective(FunctionId, IAFunc, IAFile, | ||||||
3780 | IALine, IACol, FunctionIdLoc)) | ||||||
3781 | return Error(FunctionIdLoc, "function id already allocated"); | ||||||
3782 | |||||||
3783 | return false; | ||||||
3784 | } | ||||||
3785 | |||||||
3786 | /// parseDirectiveCVLoc | ||||||
3787 | /// ::= .cv_loc FunctionId FileNumber [LineNumber] [ColumnPos] [prologue_end] | ||||||
3788 | /// [is_stmt VALUE] | ||||||
3789 | /// The first number is a file number, must have been previously assigned with | ||||||
3790 | /// a .file directive, the second number is the line number and optionally the | ||||||
3791 | /// third number is a column position (zero if not specified). The remaining | ||||||
3792 | /// optional items are .loc sub-directives. | ||||||
3793 | bool AsmParser::parseDirectiveCVLoc() { | ||||||
3794 | SMLoc DirectiveLoc = getTok().getLoc(); | ||||||
3795 | int64_t FunctionId, FileNumber; | ||||||
3796 | if (parseCVFunctionId(FunctionId, ".cv_loc") || | ||||||
3797 | parseCVFileId(FileNumber, ".cv_loc")) | ||||||
3798 | return true; | ||||||
3799 | |||||||
3800 | int64_t LineNumber = 0; | ||||||
3801 | if (getLexer().is(AsmToken::Integer)) { | ||||||
3802 | LineNumber = getTok().getIntVal(); | ||||||
3803 | if (LineNumber < 0) | ||||||
3804 | return TokError("line number less than zero in '.cv_loc' directive"); | ||||||
3805 | Lex(); | ||||||
3806 | } | ||||||
3807 | |||||||
3808 | int64_t ColumnPos = 0; | ||||||
3809 | if (getLexer().is(AsmToken::Integer)) { | ||||||
3810 | ColumnPos = getTok().getIntVal(); | ||||||
3811 | if (ColumnPos < 0) | ||||||
3812 | return TokError("column position less than zero in '.cv_loc' directive"); | ||||||
3813 | Lex(); | ||||||
3814 | } | ||||||
3815 | |||||||
3816 | bool PrologueEnd = false; | ||||||
3817 | uint64_t IsStmt = 0; | ||||||
3818 | |||||||
3819 | auto parseOp = [&]() -> bool { | ||||||
3820 | StringRef Name; | ||||||
3821 | SMLoc Loc = getTok().getLoc(); | ||||||
3822 | if (parseIdentifier(Name)) | ||||||
3823 | return TokError("unexpected token in '.cv_loc' directive"); | ||||||
3824 | if (Name == "prologue_end") | ||||||
3825 | PrologueEnd = true; | ||||||
3826 | else if (Name == "is_stmt") { | ||||||
3827 | Loc = getTok().getLoc(); | ||||||
3828 | const MCExpr *Value; | ||||||
3829 | if (parseExpression(Value)) | ||||||
3830 | return true; | ||||||
3831 | // The expression must be the constant 0 or 1. | ||||||
3832 | IsStmt = ~0ULL; | ||||||
3833 | if (const auto *MCE = dyn_cast<MCConstantExpr>(Value)) | ||||||
3834 | IsStmt = MCE->getValue(); | ||||||
3835 | |||||||
3836 | if (IsStmt > 1) | ||||||
3837 | return Error(Loc, "is_stmt value not 0 or 1"); | ||||||
3838 | } else { | ||||||
3839 | return Error(Loc, "unknown sub-directive in '.cv_loc' directive"); | ||||||
3840 | } | ||||||
3841 | return false; | ||||||
3842 | }; | ||||||
3843 | |||||||
3844 | if (parseMany(parseOp, false /*hasComma*/)) | ||||||
3845 | return true; | ||||||
3846 | |||||||
3847 | getStreamer().emitCVLocDirective(FunctionId, FileNumber, LineNumber, | ||||||
3848 | ColumnPos, PrologueEnd, IsStmt, StringRef(), | ||||||
3849 | DirectiveLoc); | ||||||
3850 | return false; | ||||||
3851 | } | ||||||
3852 | |||||||
3853 | /// parseDirectiveCVLinetable | ||||||
3854 | /// ::= .cv_linetable FunctionId, FnStart, FnEnd | ||||||
3855 | bool AsmParser::parseDirectiveCVLinetable() { | ||||||
3856 | int64_t FunctionId; | ||||||
3857 | StringRef FnStartName, FnEndName; | ||||||
3858 | SMLoc Loc = getTok().getLoc(); | ||||||
3859 | if (parseCVFunctionId(FunctionId, ".cv_linetable") || | ||||||
3860 | parseToken(AsmToken::Comma, | ||||||
3861 | "unexpected token in '.cv_linetable' directive") || | ||||||
3862 | parseTokenLoc(Loc) || check(parseIdentifier(FnStartName), Loc, | ||||||
3863 | "expected identifier in directive") || | ||||||
3864 | parseToken(AsmToken::Comma, | ||||||
3865 | "unexpected token in '.cv_linetable' directive") || | ||||||
3866 | parseTokenLoc(Loc) || check(parseIdentifier(FnEndName), Loc, | ||||||
3867 | "expected identifier in directive")) | ||||||
3868 | return true; | ||||||
3869 | |||||||
3870 | MCSymbol *FnStartSym = getContext().getOrCreateSymbol(FnStartName); | ||||||
3871 | MCSymbol *FnEndSym = getContext().getOrCreateSymbol(FnEndName); | ||||||
3872 | |||||||
3873 | getStreamer().emitCVLinetableDirective(FunctionId, FnStartSym, FnEndSym); | ||||||
3874 | return false; | ||||||
3875 | } | ||||||
3876 | |||||||
3877 | /// parseDirectiveCVInlineLinetable | ||||||
3878 | /// ::= .cv_inline_linetable PrimaryFunctionId FileId LineNum FnStart FnEnd | ||||||
3879 | bool AsmParser::parseDirectiveCVInlineLinetable() { | ||||||
3880 | int64_t PrimaryFunctionId, SourceFileId, SourceLineNum; | ||||||
3881 | StringRef FnStartName, FnEndName; | ||||||
3882 | SMLoc Loc = getTok().getLoc(); | ||||||
3883 | if (parseCVFunctionId(PrimaryFunctionId, ".cv_inline_linetable") || | ||||||
3884 | parseTokenLoc(Loc) || | ||||||
3885 | parseIntToken( | ||||||
3886 | SourceFileId, | ||||||
3887 | "expected SourceField in '.cv_inline_linetable' directive") || | ||||||
3888 | check(SourceFileId <= 0, Loc, | ||||||
3889 | "File id less than zero in '.cv_inline_linetable' directive") || | ||||||
3890 | parseTokenLoc(Loc) || | ||||||
3891 | parseIntToken( | ||||||
3892 | SourceLineNum, | ||||||
3893 | "expected SourceLineNum in '.cv_inline_linetable' directive") || | ||||||
3894 | check(SourceLineNum < 0, Loc, | ||||||
3895 | "Line number less than zero in '.cv_inline_linetable' directive") || | ||||||
3896 | parseTokenLoc(Loc) || check(parseIdentifier(FnStartName), Loc, | ||||||
3897 | "expected identifier in directive") || | ||||||
3898 | parseTokenLoc(Loc) || check(parseIdentifier(FnEndName), Loc, | ||||||
3899 | "expected identifier in directive")) | ||||||
3900 | return true; | ||||||
3901 | |||||||
3902 | if (parseToken(AsmToken::EndOfStatement, "Expected End of Statement")) | ||||||
3903 | return true; | ||||||
3904 | |||||||
3905 | MCSymbol *FnStartSym = getContext().getOrCreateSymbol(FnStartName); | ||||||
3906 | MCSymbol *FnEndSym = getContext().getOrCreateSymbol(FnEndName); | ||||||
3907 | getStreamer().emitCVInlineLinetableDirective(PrimaryFunctionId, SourceFileId, | ||||||
3908 | SourceLineNum, FnStartSym, | ||||||
3909 | FnEndSym); | ||||||
3910 | return false; | ||||||
3911 | } | ||||||
3912 | |||||||
3913 | void AsmParser::initializeCVDefRangeTypeMap() { | ||||||
3914 | CVDefRangeTypeMap["reg"] = CVDR_DEFRANGE_REGISTER; | ||||||
3915 | CVDefRangeTypeMap["frame_ptr_rel"] = CVDR_DEFRANGE_FRAMEPOINTER_REL; | ||||||
3916 | CVDefRangeTypeMap["subfield_reg"] = CVDR_DEFRANGE_SUBFIELD_REGISTER; | ||||||
3917 | CVDefRangeTypeMap["reg_rel"] = CVDR_DEFRANGE_REGISTER_REL; | ||||||
3918 | } | ||||||
3919 | |||||||
3920 | /// parseDirectiveCVDefRange | ||||||
3921 | /// ::= .cv_def_range RangeStart RangeEnd (GapStart GapEnd)*, bytes* | ||||||
3922 | bool AsmParser::parseDirectiveCVDefRange() { | ||||||
3923 | SMLoc Loc; | ||||||
3924 | std::vector<std::pair<const MCSymbol *, const MCSymbol *>> Ranges; | ||||||
3925 | while (getLexer().is(AsmToken::Identifier)) { | ||||||
3926 | Loc = getLexer().getLoc(); | ||||||
3927 | StringRef GapStartName; | ||||||
3928 | if (parseIdentifier(GapStartName)) | ||||||
3929 | return Error(Loc, "expected identifier in directive"); | ||||||
3930 | MCSymbol *GapStartSym = getContext().getOrCreateSymbol(GapStartName); | ||||||
3931 | |||||||
3932 | Loc = getLexer().getLoc(); | ||||||
3933 | StringRef GapEndName; | ||||||
3934 | if (parseIdentifier(GapEndName)) | ||||||
3935 | return Error(Loc, "expected identifier in directive"); | ||||||
3936 | MCSymbol *GapEndSym = getContext().getOrCreateSymbol(GapEndName); | ||||||
3937 | |||||||
3938 | Ranges.push_back({GapStartSym, GapEndSym}); | ||||||
3939 | } | ||||||
3940 | |||||||
3941 | StringRef CVDefRangeTypeStr; | ||||||
3942 | if (parseToken( | ||||||
3943 | AsmToken::Comma, | ||||||
3944 | "expected comma before def_range type in .cv_def_range directive") || | ||||||
3945 | parseIdentifier(CVDefRangeTypeStr)) | ||||||
3946 | return Error(Loc, "expected def_range type in directive"); | ||||||
3947 | |||||||
3948 | StringMap<CVDefRangeType>::const_iterator CVTypeIt = | ||||||
3949 | CVDefRangeTypeMap.find(CVDefRangeTypeStr); | ||||||
3950 | CVDefRangeType CVDRType = (CVTypeIt == CVDefRangeTypeMap.end()) | ||||||
3951 | ? CVDR_DEFRANGE | ||||||
3952 | : CVTypeIt->getValue(); | ||||||
3953 | switch (CVDRType) { | ||||||
3954 | case CVDR_DEFRANGE_REGISTER: { | ||||||
3955 | int64_t DRRegister; | ||||||
3956 | if (parseToken(AsmToken::Comma, "expected comma before register number in " | ||||||
3957 | ".cv_def_range directive") || | ||||||
3958 | parseAbsoluteExpression(DRRegister)) | ||||||
3959 | return Error(Loc, "expected register number"); | ||||||
3960 | |||||||
3961 | codeview::DefRangeRegisterHeader DRHdr; | ||||||
3962 | DRHdr.Register = DRRegister; | ||||||
3963 | DRHdr.MayHaveNoName = 0; | ||||||
3964 | getStreamer().emitCVDefRangeDirective(Ranges, DRHdr); | ||||||
3965 | break; | ||||||
3966 | } | ||||||
3967 | case CVDR_DEFRANGE_FRAMEPOINTER_REL: { | ||||||
3968 | int64_t DROffset; | ||||||
3969 | if (parseToken(AsmToken::Comma, | ||||||
3970 | "expected comma before offset in .cv_def_range directive") || | ||||||
3971 | parseAbsoluteExpression(DROffset)) | ||||||
3972 | return Error(Loc, "expected offset value"); | ||||||
3973 | |||||||
3974 | codeview::DefRangeFramePointerRelHeader DRHdr; | ||||||
3975 | DRHdr.Offset = DROffset; | ||||||
3976 | getStreamer().emitCVDefRangeDirective(Ranges, DRHdr); | ||||||
3977 | break; | ||||||
3978 | } | ||||||
3979 | case CVDR_DEFRANGE_SUBFIELD_REGISTER: { | ||||||
3980 | int64_t DRRegister; | ||||||
3981 | int64_t DROffsetInParent; | ||||||
3982 | if (parseToken(AsmToken::Comma, "expected comma before register number in " | ||||||
3983 | ".cv_def_range directive") || | ||||||
3984 | parseAbsoluteExpression(DRRegister)) | ||||||
3985 | return Error(Loc, "expected register number"); | ||||||
3986 | if (parseToken(AsmToken::Comma, | ||||||
3987 | "expected comma before offset in .cv_def_range directive") || | ||||||
3988 | parseAbsoluteExpression(DROffsetInParent)) | ||||||
3989 | return Error(Loc, "expected offset value"); | ||||||
3990 | |||||||
3991 | codeview::DefRangeSubfieldRegisterHeader DRHdr; | ||||||
3992 | DRHdr.Register = DRRegister; | ||||||
3993 | DRHdr.MayHaveNoName = 0; | ||||||
3994 | DRHdr.OffsetInParent = DROffsetInParent; | ||||||
3995 | getStreamer().emitCVDefRangeDirective(Ranges, DRHdr); | ||||||
3996 | break; | ||||||
3997 | } | ||||||
3998 | case CVDR_DEFRANGE_REGISTER_REL: { | ||||||
3999 | int64_t DRRegister; | ||||||
4000 | int64_t DRFlags; | ||||||
4001 | int64_t DRBasePointerOffset; | ||||||
4002 | if (parseToken(AsmToken::Comma, "expected comma before register number in " | ||||||
4003 | ".cv_def_range directive") || | ||||||
4004 | parseAbsoluteExpression(DRRegister)) | ||||||
4005 | return Error(Loc, "expected register value"); | ||||||
4006 | if (parseToken( | ||||||
4007 | AsmToken::Comma, | ||||||
4008 | "expected comma before flag value in .cv_def_range directive") || | ||||||
4009 | parseAbsoluteExpression(DRFlags)) | ||||||
4010 | return Error(Loc, "expected flag value"); | ||||||
4011 | if (parseToken(AsmToken::Comma, "expected comma before base pointer offset " | ||||||
4012 | "in .cv_def_range directive") || | ||||||
4013 | parseAbsoluteExpression(DRBasePointerOffset)) | ||||||
4014 | return Error(Loc, "expected base pointer offset value"); | ||||||
4015 | |||||||
4016 | codeview::DefRangeRegisterRelHeader DRHdr; | ||||||
4017 | DRHdr.Register = DRRegister; | ||||||
4018 | DRHdr.Flags = DRFlags; | ||||||
4019 | DRHdr.BasePointerOffset = DRBasePointerOffset; | ||||||
4020 | getStreamer().emitCVDefRangeDirective(Ranges, DRHdr); | ||||||
4021 | break; | ||||||
4022 | } | ||||||
4023 | default: | ||||||
4024 | return Error(Loc, "unexpected def_range type in .cv_def_range directive"); | ||||||
4025 | } | ||||||
4026 | return true; | ||||||
4027 | } | ||||||
4028 | |||||||
4029 | /// parseDirectiveCVString | ||||||
4030 | /// ::= .cv_stringtable "string" | ||||||
4031 | bool AsmParser::parseDirectiveCVString() { | ||||||
4032 | std::string Data; | ||||||
4033 | if (checkForValidSection() || parseEscapedString(Data)) | ||||||
4034 | return addErrorSuffix(" in '.cv_string' directive"); | ||||||
4035 | |||||||
4036 | // Put the string in the table and emit the offset. | ||||||
4037 | std::pair<StringRef, unsigned> Insertion = | ||||||
4038 | getCVContext().addToStringTable(Data); | ||||||
4039 | getStreamer().emitInt32(Insertion.second); | ||||||
4040 | return false; | ||||||
4041 | } | ||||||
4042 | |||||||
4043 | /// parseDirectiveCVStringTable | ||||||
4044 | /// ::= .cv_stringtable | ||||||
4045 | bool AsmParser::parseDirectiveCVStringTable() { | ||||||
4046 | getStreamer().emitCVStringTableDirective(); | ||||||
4047 | return false; | ||||||
4048 | } | ||||||
4049 | |||||||
4050 | /// parseDirectiveCVFileChecksums | ||||||
4051 | /// ::= .cv_filechecksums | ||||||
4052 | bool AsmParser::parseDirectiveCVFileChecksums() { | ||||||
4053 | getStreamer().emitCVFileChecksumsDirective(); | ||||||
4054 | return false; | ||||||
4055 | } | ||||||
4056 | |||||||
4057 | /// parseDirectiveCVFileChecksumOffset | ||||||
4058 | /// ::= .cv_filechecksumoffset fileno | ||||||
4059 | bool AsmParser::parseDirectiveCVFileChecksumOffset() { | ||||||
4060 | int64_t FileNo; | ||||||
4061 | if (parseIntToken(FileNo, "expected identifier in directive")) | ||||||
4062 | return true; | ||||||
4063 | if (parseToken(AsmToken::EndOfStatement, "Expected End of Statement")) | ||||||
4064 | return true; | ||||||
4065 | getStreamer().emitCVFileChecksumOffsetDirective(FileNo); | ||||||
4066 | return false; | ||||||
4067 | } | ||||||
4068 | |||||||
4069 | /// parseDirectiveCVFPOData | ||||||
4070 | /// ::= .cv_fpo_data procsym | ||||||
4071 | bool AsmParser::parseDirectiveCVFPOData() { | ||||||
4072 | SMLoc DirLoc = getLexer().getLoc(); | ||||||
4073 | StringRef ProcName; | ||||||
4074 | if (parseIdentifier(ProcName)) | ||||||
4075 | return TokError("expected symbol name"); | ||||||
4076 | if (parseEOL("unexpected tokens")) | ||||||
4077 | return addErrorSuffix(" in '.cv_fpo_data' directive"); | ||||||
4078 | MCSymbol *ProcSym = getContext().getOrCreateSymbol(ProcName); | ||||||
4079 | getStreamer().EmitCVFPOData(ProcSym, DirLoc); | ||||||
4080 | return false; | ||||||
4081 | } | ||||||
4082 | |||||||
4083 | /// parseDirectiveCFISections | ||||||
4084 | /// ::= .cfi_sections section [, section] | ||||||
4085 | bool AsmParser::parseDirectiveCFISections() { | ||||||
4086 | StringRef Name; | ||||||
4087 | bool EH = false; | ||||||
4088 | bool Debug = false; | ||||||
4089 | |||||||
4090 | if (!parseOptionalToken(AsmToken::EndOfStatement)) { | ||||||
4091 | for (;;) { | ||||||
4092 | if (parseIdentifier(Name)) | ||||||
4093 | return TokError("expected .eh_frame or .debug_frame"); | ||||||
4094 | if (Name == ".eh_frame") | ||||||
4095 | EH = true; | ||||||
4096 | else if (Name == ".debug_frame") | ||||||
4097 | Debug = true; | ||||||
4098 | if (parseOptionalToken(AsmToken::EndOfStatement)) | ||||||
4099 | break; | ||||||
4100 | if (parseToken(AsmToken::Comma)) | ||||||
4101 | return true; | ||||||
4102 | } | ||||||
4103 | } | ||||||
4104 | getStreamer().emitCFISections(EH, Debug); | ||||||
4105 | return false; | ||||||
4106 | } | ||||||
4107 | |||||||
4108 | /// parseDirectiveCFIStartProc | ||||||
4109 | /// ::= .cfi_startproc [simple] | ||||||
4110 | bool AsmParser::parseDirectiveCFIStartProc() { | ||||||
4111 | StringRef Simple; | ||||||
4112 | if (!parseOptionalToken(AsmToken::EndOfStatement)) { | ||||||
4113 | if (check(parseIdentifier(Simple) || Simple != "simple", | ||||||
4114 | "unexpected token") || | ||||||
4115 | parseEOL()) | ||||||
4116 | return addErrorSuffix(" in '.cfi_startproc' directive"); | ||||||
4117 | } | ||||||
4118 | |||||||
4119 | // TODO(kristina): Deal with a corner case of incorrect diagnostic context | ||||||
4120 | // being produced if this directive is emitted as part of preprocessor macro | ||||||
4121 | // expansion which can *ONLY* happen if Clang's cc1as is the API consumer. | ||||||
4122 | // Tools like llvm-mc on the other hand are not affected by it, and report | ||||||
4123 | // correct context information. | ||||||
4124 | getStreamer().emitCFIStartProc(!Simple.empty(), Lexer.getLoc()); | ||||||
4125 | return false; | ||||||
4126 | } | ||||||
4127 | |||||||
4128 | /// parseDirectiveCFIEndProc | ||||||
4129 | /// ::= .cfi_endproc | ||||||
4130 | bool AsmParser::parseDirectiveCFIEndProc() { | ||||||
4131 | if (parseEOL()) | ||||||
4132 | return addErrorSuffix(" in '.cfi_endproc' directive"); | ||||||
4133 | getStreamer().emitCFIEndProc(); | ||||||
4134 | return false; | ||||||
4135 | } | ||||||
4136 | |||||||
4137 | /// parse register name or number. | ||||||
4138 | bool AsmParser::parseRegisterOrRegisterNumber(int64_t &Register, | ||||||
4139 | SMLoc DirectiveLoc) { | ||||||
4140 | unsigned RegNo; | ||||||
4141 | |||||||
4142 | if (getLexer().isNot(AsmToken::Integer)) { | ||||||
4143 | if (getTargetParser().ParseRegister(RegNo, DirectiveLoc, DirectiveLoc)) | ||||||
4144 | return true; | ||||||
4145 | Register = getContext().getRegisterInfo()->getDwarfRegNum(RegNo, true); | ||||||
4146 | } else | ||||||
4147 | return parseAbsoluteExpression(Register); | ||||||
4148 | |||||||
4149 | return false; | ||||||
4150 | } | ||||||
4151 | |||||||
4152 | /// parseDirectiveCFIDefCfa | ||||||
4153 | /// ::= .cfi_def_cfa register, offset | ||||||
4154 | bool AsmParser::parseDirectiveCFIDefCfa(SMLoc DirectiveLoc) { | ||||||
4155 | int64_t Register = 0, Offset = 0; | ||||||
4156 | if (parseRegisterOrRegisterNumber(Register, DirectiveLoc) || | ||||||
4157 | parseToken(AsmToken::Comma, "unexpected token in directive") || | ||||||
4158 | parseAbsoluteExpression(Offset) || parseEOL()) | ||||||
4159 | return true; | ||||||
4160 | |||||||
4161 | getStreamer().emitCFIDefCfa(Register, Offset); | ||||||
4162 | return false; | ||||||
4163 | } | ||||||
4164 | |||||||
4165 | /// parseDirectiveCFIDefCfaOffset | ||||||
4166 | /// ::= .cfi_def_cfa_offset offset | ||||||
4167 | bool AsmParser::parseDirectiveCFIDefCfaOffset() { | ||||||
4168 | int64_t Offset = 0; | ||||||
4169 | if (parseAbsoluteExpression(Offset) || parseEOL()) | ||||||
4170 | return true; | ||||||
4171 | |||||||
4172 | getStreamer().emitCFIDefCfaOffset(Offset); | ||||||
4173 | return false; | ||||||
4174 | } | ||||||
4175 | |||||||
4176 | /// parseDirectiveCFIRegister | ||||||
4177 | /// ::= .cfi_register register, register | ||||||
4178 | bool AsmParser::parseDirectiveCFIRegister(SMLoc DirectiveLoc) { | ||||||
4179 | int64_t Register1 = 0, Register2 = 0; | ||||||
4180 | if (parseRegisterOrRegisterNumber(Register1, DirectiveLoc) || | ||||||
4181 | parseToken(AsmToken::Comma, "unexpected token in directive") || | ||||||
4182 | parseRegisterOrRegisterNumber(Register2, DirectiveLoc) || parseEOL()) | ||||||
4183 | return true; | ||||||
4184 | |||||||
4185 | getStreamer().emitCFIRegister(Register1, Register2); | ||||||
4186 | return false; | ||||||
4187 | } | ||||||
4188 | |||||||
4189 | /// parseDirectiveCFIWindowSave | ||||||
4190 | /// ::= .cfi_window_save | ||||||
4191 | bool AsmParser::parseDirectiveCFIWindowSave() { | ||||||
4192 | if (parseEOL()) | ||||||
4193 | return true; | ||||||
4194 | getStreamer().emitCFIWindowSave(); | ||||||
4195 | return false; | ||||||
4196 | } | ||||||
4197 | |||||||
4198 | /// parseDirectiveCFIAdjustCfaOffset | ||||||
4199 | /// ::= .cfi_adjust_cfa_offset adjustment | ||||||
4200 | bool AsmParser::parseDirectiveCFIAdjustCfaOffset() { | ||||||
4201 | int64_t Adjustment = 0; | ||||||
4202 | if (parseAbsoluteExpression(Adjustment) || parseEOL()) | ||||||
4203 | return true; | ||||||
4204 | |||||||
4205 | getStreamer().emitCFIAdjustCfaOffset(Adjustment); | ||||||
4206 | return false; | ||||||
4207 | } | ||||||
4208 | |||||||
4209 | /// parseDirectiveCFIDefCfaRegister | ||||||
4210 | /// ::= .cfi_def_cfa_register register | ||||||
4211 | bool AsmParser::parseDirectiveCFIDefCfaRegister(SMLoc DirectiveLoc) { | ||||||
4212 | int64_t Register = 0; | ||||||
4213 | if (parseRegisterOrRegisterNumber(Register, DirectiveLoc) || parseEOL()) | ||||||
4214 | return true; | ||||||
4215 | |||||||
4216 | getStreamer().emitCFIDefCfaRegister(Register); | ||||||
4217 | return false; | ||||||
4218 | } | ||||||
4219 | |||||||
4220 | /// parseDirectiveCFIOffset | ||||||
4221 | /// ::= .cfi_offset register, offset | ||||||
4222 | bool AsmParser::parseDirectiveCFIOffset(SMLoc DirectiveLoc) { | ||||||
4223 | int64_t Register = 0; | ||||||
4224 | int64_t Offset = 0; | ||||||
4225 | |||||||
4226 | if (parseRegisterOrRegisterNumber(Register, DirectiveLoc) || | ||||||
4227 | parseToken(AsmToken::Comma, "unexpected token in directive") || | ||||||
4228 | parseAbsoluteExpression(Offset) || parseEOL()) | ||||||
4229 | return true; | ||||||
4230 | |||||||
4231 | getStreamer().emitCFIOffset(Register, Offset); | ||||||
4232 | return false; | ||||||
4233 | } | ||||||
4234 | |||||||
4235 | /// parseDirectiveCFIRelOffset | ||||||
4236 | /// ::= .cfi_rel_offset register, offset | ||||||
4237 | bool AsmParser::parseDirectiveCFIRelOffset(SMLoc DirectiveLoc) { | ||||||
4238 | int64_t Register = 0, Offset = 0; | ||||||
4239 | |||||||
4240 | if (parseRegisterOrRegisterNumber(Register, DirectiveLoc) || | ||||||
4241 | parseToken(AsmToken::Comma, "unexpected token in directive") || | ||||||
4242 | parseAbsoluteExpression(Offset) || parseEOL()) | ||||||
4243 | return true; | ||||||
4244 | |||||||
4245 | getStreamer().emitCFIRelOffset(Register, Offset); | ||||||
4246 | return false; | ||||||
4247 | } | ||||||
4248 | |||||||
4249 | static bool isValidEncoding(int64_t Encoding) { | ||||||
4250 | if (Encoding & ~0xff) | ||||||
4251 | return false; | ||||||
4252 | |||||||
4253 | if (Encoding == dwarf::DW_EH_PE_omit) | ||||||
4254 | return true; | ||||||
4255 | |||||||
4256 | const unsigned Format = Encoding & 0xf; | ||||||
4257 | if (Format != dwarf::DW_EH_PE_absptr && Format != dwarf::DW_EH_PE_udata2 && | ||||||
4258 | Format != dwarf::DW_EH_PE_udata4 && Format != dwarf::DW_EH_PE_udata8 && | ||||||
4259 | Format != dwarf::DW_EH_PE_sdata2 && Format != dwarf::DW_EH_PE_sdata4 && | ||||||
4260 | Format != dwarf::DW_EH_PE_sdata8 && Format != dwarf::DW_EH_PE_signed) | ||||||
4261 | return false; | ||||||
4262 | |||||||
4263 | const unsigned Application = Encoding & 0x70; | ||||||
4264 | if (Application != dwarf::DW_EH_PE_absptr && | ||||||
4265 | Application != dwarf::DW_EH_PE_pcrel) | ||||||
4266 | return false; | ||||||
4267 | |||||||
4268 | return true; | ||||||
4269 | } | ||||||
4270 | |||||||
4271 | /// parseDirectiveCFIPersonalityOrLsda | ||||||
4272 | /// IsPersonality true for cfi_personality, false for cfi_lsda | ||||||
4273 | /// ::= .cfi_personality encoding, [symbol_name] | ||||||
4274 | /// ::= .cfi_lsda encoding, [symbol_name] | ||||||
4275 | bool AsmParser::parseDirectiveCFIPersonalityOrLsda(bool IsPersonality) { | ||||||
4276 | int64_t Encoding = 0; | ||||||
4277 | if (parseAbsoluteExpression(Encoding)) | ||||||
4278 | return true; | ||||||
4279 | if (Encoding == dwarf::DW_EH_PE_omit) | ||||||
4280 | return false; | ||||||
4281 | |||||||
4282 | StringRef Name; | ||||||
4283 | if (check(!isValidEncoding(Encoding), "unsupported encoding.") || | ||||||
4284 | parseToken(AsmToken::Comma, "unexpected token in directive") || | ||||||
4285 | check(parseIdentifier(Name), "expected identifier in directive") || | ||||||
4286 | parseEOL()) | ||||||
4287 | return true; | ||||||
4288 | |||||||
4289 | MCSymbol *Sym = getContext().getOrCreateSymbol(Name); | ||||||
4290 | |||||||
4291 | if (IsPersonality) | ||||||
4292 | getStreamer().emitCFIPersonality(Sym, Encoding); | ||||||
4293 | else | ||||||
4294 | getStreamer().emitCFILsda(Sym, Encoding); | ||||||
4295 | return false; | ||||||
4296 | } | ||||||
4297 | |||||||
4298 | /// parseDirectiveCFIRememberState | ||||||
4299 | /// ::= .cfi_remember_state | ||||||
4300 | bool AsmParser::parseDirectiveCFIRememberState() { | ||||||
4301 | if (parseEOL()) | ||||||
4302 | return true; | ||||||
4303 | getStreamer().emitCFIRememberState(); | ||||||
4304 | return false; | ||||||
4305 | } | ||||||
4306 | |||||||
4307 | /// parseDirectiveCFIRestoreState | ||||||
4308 | /// ::= .cfi_remember_state | ||||||
4309 | bool AsmParser::parseDirectiveCFIRestoreState() { | ||||||
4310 | if (parseEOL()) | ||||||
4311 | return true; | ||||||
4312 | getStreamer().emitCFIRestoreState(); | ||||||
4313 | return false; | ||||||
4314 | } | ||||||
4315 | |||||||
4316 | /// parseDirectiveCFISameValue | ||||||
4317 | /// ::= .cfi_same_value register | ||||||
4318 | bool AsmParser::parseDirectiveCFISameValue(SMLoc DirectiveLoc) { | ||||||
4319 | int64_t Register = 0; | ||||||
4320 | |||||||
4321 | if (parseRegisterOrRegisterNumber(Register, DirectiveLoc) || parseEOL()) | ||||||
4322 | return true; | ||||||
4323 | |||||||
4324 | getStreamer().emitCFISameValue(Register); | ||||||
4325 | return false; | ||||||
4326 | } | ||||||
4327 | |||||||
4328 | /// parseDirectiveCFIRestore | ||||||
4329 | /// ::= .cfi_restore register | ||||||
4330 | bool AsmParser::parseDirectiveCFIRestore(SMLoc DirectiveLoc) { | ||||||
4331 | int64_t Register = 0; | ||||||
4332 | if (parseRegisterOrRegisterNumber(Register, DirectiveLoc) || parseEOL()) | ||||||
4333 | return true; | ||||||
4334 | |||||||
4335 | getStreamer().emitCFIRestore(Register); | ||||||
4336 | return false; | ||||||
4337 | } | ||||||
4338 | |||||||
4339 | /// parseDirectiveCFIEscape | ||||||
4340 | /// ::= .cfi_escape expression[,...] | ||||||
4341 | bool AsmParser::parseDirectiveCFIEscape() { | ||||||
4342 | std::string Values; | ||||||
4343 | int64_t CurrValue; | ||||||
4344 | if (parseAbsoluteExpression(CurrValue)) | ||||||
4345 | return true; | ||||||
4346 | |||||||
4347 | Values.push_back((uint8_t)CurrValue); | ||||||
4348 | |||||||
4349 | while (getLexer().is(AsmToken::Comma)) { | ||||||
4350 | Lex(); | ||||||
4351 | |||||||
4352 | if (parseAbsoluteExpression(CurrValue)) | ||||||
4353 | return true; | ||||||
4354 | |||||||
4355 | Values.push_back((uint8_t)CurrValue); | ||||||
4356 | } | ||||||
4357 | |||||||
4358 | getStreamer().emitCFIEscape(Values); | ||||||
4359 | return false; | ||||||
4360 | } | ||||||
4361 | |||||||
4362 | /// parseDirectiveCFIReturnColumn | ||||||
4363 | /// ::= .cfi_return_column register | ||||||
4364 | bool AsmParser::parseDirectiveCFIReturnColumn(SMLoc DirectiveLoc) { | ||||||
4365 | int64_t Register = 0; | ||||||
4366 | if (parseRegisterOrRegisterNumber(Register, DirectiveLoc) || parseEOL()) | ||||||
4367 | return true; | ||||||
4368 | getStreamer().emitCFIReturnColumn(Register); | ||||||
4369 | return false; | ||||||
4370 | } | ||||||
4371 | |||||||
4372 | /// parseDirectiveCFISignalFrame | ||||||
4373 | /// ::= .cfi_signal_frame | ||||||
4374 | bool AsmParser::parseDirectiveCFISignalFrame() { | ||||||
4375 | if (parseEOL()) | ||||||
4376 | return true; | ||||||
4377 | |||||||
4378 | getStreamer().emitCFISignalFrame(); | ||||||
4379 | return false; | ||||||
4380 | } | ||||||
4381 | |||||||
4382 | /// parseDirectiveCFIUndefined | ||||||
4383 | /// ::= .cfi_undefined register | ||||||
4384 | bool AsmParser::parseDirectiveCFIUndefined(SMLoc DirectiveLoc) { | ||||||
4385 | int64_t Register = 0; | ||||||
4386 | |||||||
4387 | if (parseRegisterOrRegisterNumber(Register, DirectiveLoc) || parseEOL()) | ||||||
4388 | return true; | ||||||
4389 | |||||||
4390 | getStreamer().emitCFIUndefined(Register); | ||||||
4391 | return false; | ||||||
4392 | } | ||||||
4393 | |||||||
4394 | /// parseDirectiveAltmacro | ||||||
4395 | /// ::= .altmacro | ||||||
4396 | /// ::= .noaltmacro | ||||||
4397 | bool AsmParser::parseDirectiveAltmacro(StringRef Directive) { | ||||||
4398 | if (parseEOL()) | ||||||
4399 | return true; | ||||||
4400 | AltMacroMode = (Directive == ".altmacro"); | ||||||
4401 | return false; | ||||||
4402 | } | ||||||
4403 | |||||||
4404 | /// parseDirectiveMacrosOnOff | ||||||
4405 | /// ::= .macros_on | ||||||
4406 | /// ::= .macros_off | ||||||
4407 | bool AsmParser::parseDirectiveMacrosOnOff(StringRef Directive) { | ||||||
4408 | if (parseEOL()) | ||||||
4409 | return true; | ||||||
4410 | setMacrosEnabled(Directive == ".macros_on"); | ||||||
4411 | return false; | ||||||
4412 | } | ||||||
4413 | |||||||
4414 | /// parseDirectiveMacro | ||||||
4415 | /// ::= .macro name[,] [parameters] | ||||||
4416 | bool AsmParser::parseDirectiveMacro(SMLoc DirectiveLoc) { | ||||||
4417 | StringRef Name; | ||||||
4418 | if (parseIdentifier(Name)) | ||||||
4419 | return TokError("expected identifier in '.macro' directive"); | ||||||
4420 | |||||||
4421 | if (getLexer().is(AsmToken::Comma)) | ||||||
4422 | Lex(); | ||||||
4423 | |||||||
4424 | MCAsmMacroParameters Parameters; | ||||||
4425 | while (getLexer().isNot(AsmToken::EndOfStatement)) { | ||||||
4426 | |||||||
4427 | if (!Parameters.empty() && Parameters.back().Vararg) | ||||||
4428 | return Error(Lexer.getLoc(), "vararg parameter '" + | ||||||
4429 | Parameters.back().Name + | ||||||
4430 | "' should be the last parameter"); | ||||||
4431 | |||||||
4432 | MCAsmMacroParameter Parameter; | ||||||
4433 | if (parseIdentifier(Parameter.Name)) | ||||||
4434 | return TokError("expected identifier in '.macro' directive"); | ||||||
4435 | |||||||
4436 | // Emit an error if two (or more) named parameters share the same name | ||||||
4437 | for (const MCAsmMacroParameter& CurrParam : Parameters) | ||||||
4438 | if (CurrParam.Name.equals(Parameter.Name)) | ||||||
4439 | return TokError("macro '" + Name + "' has multiple parameters" | ||||||
4440 | " named '" + Parameter.Name + "'"); | ||||||
4441 | |||||||
4442 | if (Lexer.is(AsmToken::Colon)) { | ||||||
4443 | Lex(); // consume ':' | ||||||
4444 | |||||||
4445 | SMLoc QualLoc; | ||||||
4446 | StringRef Qualifier; | ||||||
4447 | |||||||
4448 | QualLoc = Lexer.getLoc(); | ||||||
4449 | if (parseIdentifier(Qualifier)) | ||||||
4450 | return Error(QualLoc, "missing parameter qualifier for " | ||||||
4451 | "'" + Parameter.Name + "' in macro '" + Name + "'"); | ||||||
4452 | |||||||
4453 | if (Qualifier == "req") | ||||||
4454 | Parameter.Required = true; | ||||||
4455 | else if (Qualifier == "vararg") | ||||||
4456 | Parameter.Vararg = true; | ||||||
4457 | else | ||||||
4458 | return Error(QualLoc, Qualifier + " is not a valid parameter qualifier " | ||||||
4459 | "for '" + Parameter.Name + "' in macro '" + Name + "'"); | ||||||
4460 | } | ||||||
4461 | |||||||
4462 | if (getLexer().is(AsmToken::Equal)) { | ||||||
4463 | Lex(); | ||||||
4464 | |||||||
4465 | SMLoc ParamLoc; | ||||||
4466 | |||||||
4467 | ParamLoc = Lexer.getLoc(); | ||||||
4468 | if (parseMacroArgument(Parameter.Value, /*Vararg=*/false )) | ||||||
4469 | return true; | ||||||
4470 | |||||||
4471 | if (Parameter.Required) | ||||||
4472 | Warning(ParamLoc, "pointless default value for required parameter " | ||||||
4473 | "'" + Parameter.Name + "' in macro '" + Name + "'"); | ||||||
4474 | } | ||||||
4475 | |||||||
4476 | Parameters.push_back(std::move(Parameter)); | ||||||
4477 | |||||||
4478 | if (getLexer().is(AsmToken::Comma)) | ||||||
4479 | Lex(); | ||||||
4480 | } | ||||||
4481 | |||||||
4482 | // Eat just the end of statement. | ||||||
4483 | Lexer.Lex(); | ||||||
4484 | |||||||
4485 | // Consuming deferred text, so use Lexer.Lex to ignore Lexing Errors | ||||||
4486 | AsmToken EndToken, StartToken = getTok(); | ||||||
4487 | unsigned MacroDepth = 0; | ||||||
4488 | // Lex the macro definition. | ||||||
4489 | while (true) { | ||||||
4490 | // Ignore Lexing errors in macros. | ||||||
4491 | while (Lexer.is(AsmToken::Error)) { | ||||||
4492 | Lexer.Lex(); | ||||||
4493 | } | ||||||
4494 | |||||||
4495 | // Check whether we have reached the end of the file. | ||||||
4496 | if (getLexer().is(AsmToken::Eof)) | ||||||
4497 | return Error(DirectiveLoc, "no matching '.endmacro' in definition"); | ||||||
4498 | |||||||
4499 | // Otherwise, check whether we have reach the .endmacro or the start of a | ||||||
4500 | // preprocessor line marker. | ||||||
4501 | if (getLexer().is(AsmToken::Identifier)) { | ||||||
4502 | if (getTok().getIdentifier() == ".endm" || | ||||||
4503 | getTok().getIdentifier() == ".endmacro") { | ||||||
4504 | if (MacroDepth == 0) { // Outermost macro. | ||||||
4505 | EndToken = getTok(); | ||||||
4506 | Lexer.Lex(); | ||||||
4507 | if (getLexer().isNot(AsmToken::EndOfStatement)) | ||||||
4508 | return TokError("unexpected token in '" + EndToken.getIdentifier() + | ||||||
4509 | "' directive"); | ||||||
4510 | break; | ||||||
4511 | } else { | ||||||
4512 | // Otherwise we just found the end of an inner macro. | ||||||
4513 | --MacroDepth; | ||||||
4514 | } | ||||||
4515 | } else if (getTok().getIdentifier() == ".macro") { | ||||||
4516 | // We allow nested macros. Those aren't instantiated until the outermost | ||||||
4517 | // macro is expanded so just ignore them for now. | ||||||
4518 | ++MacroDepth; | ||||||
4519 | } | ||||||
4520 | } else if (Lexer.is(AsmToken::HashDirective)) { | ||||||
4521 | (void)parseCppHashLineFilenameComment(getLexer().getLoc()); | ||||||
4522 | } | ||||||
4523 | |||||||
4524 | // Otherwise, scan til the end of the statement. | ||||||
4525 | eatToEndOfStatement(); | ||||||
4526 | } | ||||||
4527 | |||||||
4528 | if (getContext().lookupMacro(Name)) { | ||||||
4529 | return Error(DirectiveLoc, "macro '" + Name + "' is already defined"); | ||||||
4530 | } | ||||||
4531 | |||||||
4532 | const char *BodyStart = StartToken.getLoc().getPointer(); | ||||||
4533 | const char *BodyEnd = EndToken.getLoc().getPointer(); | ||||||
4534 | StringRef Body = StringRef(BodyStart, BodyEnd - BodyStart); | ||||||
4535 | checkForBadMacro(DirectiveLoc, Name, Body, Parameters); | ||||||
4536 | MCAsmMacro Macro(Name, Body, std::move(Parameters)); | ||||||
4537 | 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) | ||||||
4538 | Macro.dump())do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("asm-macros")) { dbgs() << "Defining new macro:\n"; Macro .dump(); } } while (false); | ||||||
4539 | getContext().defineMacro(Name, std::move(Macro)); | ||||||
4540 | return false; | ||||||
4541 | } | ||||||
4542 | |||||||
4543 | /// checkForBadMacro | ||||||
4544 | /// | ||||||
4545 | /// With the support added for named parameters there may be code out there that | ||||||
4546 | /// is transitioning from positional parameters. In versions of gas that did | ||||||
4547 | /// not support named parameters they would be ignored on the macro definition. | ||||||
4548 | /// But to support both styles of parameters this is not possible so if a macro | ||||||
4549 | /// definition has named parameters but does not use them and has what appears | ||||||
4550 | /// to be positional parameters, strings like $1, $2, ... and $n, then issue a | ||||||
4551 | /// warning that the positional parameter found in body which have no effect. | ||||||
4552 | /// Hoping the developer will either remove the named parameters from the macro | ||||||
4553 | /// definition so the positional parameters get used if that was what was | ||||||
4554 | /// intended or change the macro to use the named parameters. It is possible | ||||||
4555 | /// this warning will trigger when the none of the named parameters are used | ||||||
4556 | /// and the strings like $1 are infact to simply to be passed trough unchanged. | ||||||
4557 | void AsmParser::checkForBadMacro(SMLoc DirectiveLoc, StringRef Name, | ||||||
4558 | StringRef Body, | ||||||
4559 | ArrayRef<MCAsmMacroParameter> Parameters) { | ||||||
4560 | // If this macro is not defined with named parameters the warning we are | ||||||
4561 | // checking for here doesn't apply. | ||||||
4562 | unsigned NParameters = Parameters.size(); | ||||||
4563 | if (NParameters == 0) | ||||||
4564 | return; | ||||||
4565 | |||||||
4566 | bool NamedParametersFound = false; | ||||||
4567 | bool PositionalParametersFound = false; | ||||||
4568 | |||||||
4569 | // Look at the body of the macro for use of both the named parameters and what | ||||||
4570 | // are likely to be positional parameters. This is what expandMacro() is | ||||||
4571 | // doing when it finds the parameters in the body. | ||||||
4572 | while (!Body.empty()) { | ||||||
4573 | // Scan for the next possible parameter. | ||||||
4574 | std::size_t End = Body.size(), Pos = 0; | ||||||
4575 | for (; Pos != End; ++Pos) { | ||||||
4576 | // Check for a substitution or escape. | ||||||
4577 | // This macro is defined with parameters, look for \foo, \bar, etc. | ||||||
4578 | if (Body[Pos] == '\\' && Pos + 1 != End) | ||||||
4579 | break; | ||||||
4580 | |||||||
4581 | // This macro should have parameters, but look for $0, $1, ..., $n too. | ||||||
4582 | if (Body[Pos] != '$' || Pos + 1 == End) | ||||||
4583 | continue; | ||||||
4584 | char Next = Body[Pos + 1]; | ||||||
4585 | if (Next == '$' || Next == 'n' || | ||||||
4586 | isdigit(static_cast<unsigned char>(Next))) | ||||||
4587 | break; | ||||||
4588 | } | ||||||
4589 | |||||||
4590 | // Check if we reached the end. | ||||||
4591 | if (Pos == End) | ||||||
4592 | break; | ||||||
4593 | |||||||
4594 | if (Body[Pos] == '$') { | ||||||
4595 | switch (Body[Pos + 1]) { | ||||||
4596 | // $$ => $ | ||||||
4597 | case '$': | ||||||
4598 | break; | ||||||
4599 | |||||||
4600 | // $n => number of arguments | ||||||
4601 | case 'n': | ||||||
4602 | PositionalParametersFound = true; | ||||||
4603 | break; | ||||||
4604 | |||||||
4605 | // $[0-9] => argument | ||||||
4606 | default: { | ||||||
4607 | PositionalParametersFound = true; | ||||||
4608 | break; | ||||||
4609 | } | ||||||
4610 | } | ||||||
4611 | Pos += 2; | ||||||
4612 | } else { | ||||||
4613 | unsigned I = Pos + 1; | ||||||
4614 | while (isIdentifierChar(Body[I]) && I + 1 != End) | ||||||
4615 | ++I; | ||||||
4616 | |||||||
4617 | const char *Begin = Body.data() + Pos + 1; | ||||||
4618 | StringRef Argument(Begin, I - (Pos + 1)); | ||||||
4619 | unsigned Index = 0; | ||||||
4620 | for (; Index < NParameters; ++Index) | ||||||
4621 | if (Parameters[Index].Name == Argument) | ||||||
4622 | break; | ||||||
4623 | |||||||
4624 | if (Index == NParameters) { | ||||||
4625 | if (Body[Pos + 1] == '(' && Body[Pos + 2] == ')') | ||||||
4626 | Pos += 3; | ||||||
4627 | else { | ||||||
4628 | Pos = I; | ||||||
4629 | } | ||||||
4630 | } else { | ||||||
4631 | NamedParametersFound = true; | ||||||
4632 | Pos += 1 + Argument.size(); | ||||||
4633 | } | ||||||
4634 | } | ||||||
4635 | // Update the scan point. | ||||||
4636 | Body = Body.substr(Pos); | ||||||
4637 | } | ||||||
4638 | |||||||
4639 | if (!NamedParametersFound && PositionalParametersFound) | ||||||
4640 | Warning(DirectiveLoc, "macro defined with named parameters which are not " | ||||||
4641 | "used in macro body, possible positional parameter " | ||||||
4642 | "found in body which will have no effect"); | ||||||
4643 | } | ||||||
4644 | |||||||
4645 | /// parseDirectiveExitMacro | ||||||
4646 | /// ::= .exitm | ||||||
4647 | bool AsmParser::parseDirectiveExitMacro(StringRef Directive) { | ||||||
4648 | if (parseEOL()) | ||||||
4649 | return true; | ||||||
4650 | |||||||
4651 | if (!isInsideMacroInstantiation()) | ||||||
4652 | return TokError("unexpected '" + Directive + "' in file, " | ||||||
4653 | "no current macro definition"); | ||||||
4654 | |||||||
4655 | // Exit all conditionals that are active in the current macro. | ||||||
4656 | while (TheCondStack.size() != ActiveMacros.back()->CondStackDepth) { | ||||||
4657 | TheCondState = TheCondStack.back(); | ||||||
4658 | TheCondStack.pop_back(); | ||||||
4659 | } | ||||||
4660 | |||||||
4661 | handleMacroExit(); | ||||||
4662 | return false; | ||||||
4663 | } | ||||||
4664 | |||||||
4665 | /// parseDirectiveEndMacro | ||||||
4666 | /// ::= .endm | ||||||
4667 | /// ::= .endmacro | ||||||
4668 | bool AsmParser::parseDirectiveEndMacro(StringRef Directive) { | ||||||
4669 | if (getLexer().isNot(AsmToken::EndOfStatement)) | ||||||
4670 | return TokError("unexpected token in '" + Directive + "' directive"); | ||||||
4671 | |||||||
4672 | // If we are inside a macro instantiation, terminate the current | ||||||
4673 | // instantiation. | ||||||
4674 | if (isInsideMacroInstantiation()) { | ||||||
4675 | handleMacroExit(); | ||||||
4676 | return false; | ||||||
4677 | } | ||||||
4678 | |||||||
4679 | // Otherwise, this .endmacro is a stray entry in the file; well formed | ||||||
4680 | // .endmacro directives are handled during the macro definition parsing. | ||||||
4681 | return TokError("unexpected '" + Directive + "' in file, " | ||||||
4682 | "no current macro definition"); | ||||||
4683 | } | ||||||
4684 | |||||||
4685 | /// parseDirectivePurgeMacro | ||||||
4686 | /// ::= .purgem name | ||||||
4687 | bool AsmParser::parseDirectivePurgeMacro(SMLoc DirectiveLoc) { | ||||||
4688 | StringRef Name; | ||||||
4689 | SMLoc Loc; | ||||||
4690 | if (parseTokenLoc(Loc) || | ||||||
4691 | check(parseIdentifier(Name), Loc, | ||||||
4692 | "expected identifier in '.purgem' directive") || | ||||||
4693 | parseEOL()) | ||||||
4694 | return true; | ||||||
4695 | |||||||
4696 | if (!getContext().lookupMacro(Name)) | ||||||
4697 | return Error(DirectiveLoc, "macro '" + Name + "' is not defined"); | ||||||
4698 | |||||||
4699 | getContext().undefineMacro(Name); | ||||||
4700 | DEBUG_WITH_TYPE("asm-macros", dbgs()do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("asm-macros")) { dbgs() << "Un-defining macro: " << Name << "\n"; } } while (false) | ||||||
4701 | << "Un-defining macro: " << Name << "\n")do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("asm-macros")) { dbgs() << "Un-defining macro: " << Name << "\n"; } } while (false); | ||||||
4702 | return false; | ||||||
4703 | } | ||||||
4704 | |||||||
4705 | /// parseDirectiveBundleAlignMode | ||||||
4706 | /// ::= {.bundle_align_mode} expression | ||||||
4707 | bool AsmParser::parseDirectiveBundleAlignMode() { | ||||||
4708 | // Expect a single argument: an expression that evaluates to a constant | ||||||
4709 | // in the inclusive range 0-30. | ||||||
4710 | SMLoc ExprLoc = getLexer().getLoc(); | ||||||
4711 | int64_t AlignSizePow2; | ||||||
4712 | if (checkForValidSection() || parseAbsoluteExpression(AlignSizePow2) || | ||||||
4713 | parseEOL() || | ||||||
4714 | check(AlignSizePow2 < 0 || AlignSizePow2 > 30, ExprLoc, | ||||||
4715 | "invalid bundle alignment size (expected between 0 and 30)")) | ||||||
4716 | return true; | ||||||
4717 | |||||||
4718 | // Because of AlignSizePow2's verified range we can safely truncate it to | ||||||
4719 | // unsigned. | ||||||
4720 | getStreamer().emitBundleAlignMode(static_cast<unsigned>(AlignSizePow2)); | ||||||
4721 | return false; | ||||||
4722 | } | ||||||
4723 | |||||||
4724 | /// parseDirectiveBundleLock | ||||||
4725 | /// ::= {.bundle_lock} [align_to_end] | ||||||
4726 | bool AsmParser::parseDirectiveBundleLock() { | ||||||
4727 | if (checkForValidSection()) | ||||||
4728 | return true; | ||||||
4729 | bool AlignToEnd = false; | ||||||
4730 | |||||||
4731 | StringRef Option; | ||||||
4732 | SMLoc Loc = getTok().getLoc(); | ||||||
4733 | const char *kInvalidOptionError = | ||||||
4734 | "invalid option for '.bundle_lock' directive"; | ||||||
4735 | |||||||
4736 | if (!parseOptionalToken(AsmToken::EndOfStatement)) { | ||||||
4737 | if (check(parseIdentifier(Option), Loc, kInvalidOptionError) || | ||||||
4738 | check(Option != "align_to_end", Loc, kInvalidOptionError) || parseEOL()) | ||||||
4739 | return true; | ||||||
4740 | AlignToEnd = true; | ||||||
4741 | } | ||||||
4742 | |||||||
4743 | getStreamer().emitBundleLock(AlignToEnd); | ||||||
4744 | return false; | ||||||
4745 | } | ||||||
4746 | |||||||
4747 | /// parseDirectiveBundleLock | ||||||
4748 | /// ::= {.bundle_lock} | ||||||
4749 | bool AsmParser::parseDirectiveBundleUnlock() { | ||||||
4750 | if (checkForValidSection() || parseEOL()) | ||||||
4751 | return true; | ||||||
4752 | |||||||
4753 | getStreamer().emitBundleUnlock(); | ||||||
4754 | return false; | ||||||
4755 | } | ||||||
4756 | |||||||
4757 | /// parseDirectiveSpace | ||||||
4758 | /// ::= (.skip | .space) expression [ , expression ] | ||||||
4759 | bool AsmParser::parseDirectiveSpace(StringRef IDVal) { | ||||||
4760 | SMLoc NumBytesLoc = Lexer.getLoc(); | ||||||
4761 | const MCExpr *NumBytes; | ||||||
4762 | if (checkForValidSection() || parseExpression(NumBytes)) | ||||||
4763 | return true; | ||||||
4764 | |||||||
4765 | int64_t FillExpr = 0; | ||||||
4766 | if (parseOptionalToken(AsmToken::Comma)) | ||||||
4767 | if (parseAbsoluteExpression(FillExpr)) | ||||||
4768 | return addErrorSuffix("in '" + Twine(IDVal) + "' directive"); | ||||||
4769 | if (parseEOL()) | ||||||
4770 | return addErrorSuffix("in '" + Twine(IDVal) + "' directive"); | ||||||
4771 | |||||||
4772 | // FIXME: Sometimes the fill expr is 'nop' if it isn't supplied, instead of 0. | ||||||
4773 | getStreamer().emitFill(*NumBytes, FillExpr, NumBytesLoc); | ||||||
4774 | |||||||
4775 | return false; | ||||||
4776 | } | ||||||
4777 | |||||||
4778 | /// parseDirectiveDCB | ||||||
4779 | /// ::= .dcb.{b, l, w} expression, expression | ||||||
4780 | bool AsmParser::parseDirectiveDCB(StringRef IDVal, unsigned Size) { | ||||||
4781 | SMLoc NumValuesLoc = Lexer.getLoc(); | ||||||
4782 | int64_t NumValues; | ||||||
4783 | if (checkForValidSection() || parseAbsoluteExpression(NumValues)) | ||||||
4784 | return true; | ||||||
4785 | |||||||
4786 | if (NumValues < 0) { | ||||||
4787 | Warning(NumValuesLoc, "'" + Twine(IDVal) + "' directive with negative repeat count has no effect"); | ||||||
4788 | return false; | ||||||
4789 | } | ||||||
4790 | |||||||
4791 | if (parseToken(AsmToken::Comma, | ||||||
4792 | "unexpected token in '" + Twine(IDVal) + "' directive")) | ||||||
4793 | return true; | ||||||
4794 | |||||||
4795 | const MCExpr *Value; | ||||||
4796 | SMLoc ExprLoc = getLexer().getLoc(); | ||||||
4797 | if (parseExpression(Value)) | ||||||
4798 | return true; | ||||||
4799 | |||||||
4800 | // Special case constant expressions to match code generator. | ||||||
4801 | if (const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Value)) { | ||||||
4802 | assert(Size <= 8 && "Invalid size")((Size <= 8 && "Invalid size") ? static_cast<void > (0) : __assert_fail ("Size <= 8 && \"Invalid size\"" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/llvm/lib/MC/MCParser/AsmParser.cpp" , 4802, __PRETTY_FUNCTION__)); | ||||||
4803 | uint64_t IntValue = MCE->getValue(); | ||||||
4804 | if (!isUIntN(8 * Size, IntValue) && !isIntN(8 * Size, IntValue)) | ||||||
4805 | return Error(ExprLoc, "literal value out of range for directive"); | ||||||
4806 | for (uint64_t i = 0, e = NumValues; i != e; ++i) | ||||||
4807 | getStreamer().emitIntValue(IntValue, Size); | ||||||
4808 | } else { | ||||||
4809 | for (uint64_t i = 0, e = NumValues; i != e; ++i) | ||||||
4810 | getStreamer().emitValue(Value, Size, ExprLoc); | ||||||
4811 | } | ||||||
4812 | |||||||
4813 | return parseEOL(); | ||||||
4814 | } | ||||||
4815 | |||||||
4816 | /// parseDirectiveRealDCB | ||||||
4817 | /// ::= .dcb.{d, s} expression, expression | ||||||
4818 | bool AsmParser::parseDirectiveRealDCB(StringRef IDVal, const fltSemantics &Semantics) { | ||||||
4819 | SMLoc NumValuesLoc = Lexer.getLoc(); | ||||||
4820 | int64_t NumValues; | ||||||
4821 | if (checkForValidSection() || parseAbsoluteExpression(NumValues)) | ||||||
4822 | return true; | ||||||
4823 | |||||||
4824 | if (NumValues < 0) { | ||||||
4825 | Warning(NumValuesLoc, "'" + Twine(IDVal) + "' directive with negative repeat count has no effect"); | ||||||
4826 | return false; | ||||||
4827 | } | ||||||
4828 | |||||||
4829 | if (parseToken(AsmToken::Comma, | ||||||
4830 | "unexpected token in '" + Twine(IDVal) + "' directive")) | ||||||
4831 | return true; | ||||||
4832 | |||||||
4833 | APInt AsInt; | ||||||
4834 | if (parseRealValue(Semantics, AsInt) || parseEOL()) | ||||||
4835 | return true; | ||||||
4836 | |||||||
4837 | for (uint64_t i = 0, e = NumValues; i != e; ++i) | ||||||
4838 | getStreamer().emitIntValue(AsInt.getLimitedValue(), | ||||||
4839 | AsInt.getBitWidth() / 8); | ||||||
4840 | |||||||
4841 | return false; | ||||||
4842 | } | ||||||
4843 | |||||||
4844 | /// parseDirectiveDS | ||||||
4845 | /// ::= .ds.{b, d, l, p, s, w, x} expression | ||||||
4846 | bool AsmParser::parseDirectiveDS(StringRef IDVal, unsigned Size) { | ||||||
4847 | SMLoc NumValuesLoc = Lexer.getLoc(); | ||||||
4848 | int64_t NumValues; | ||||||
4849 | if (checkForValidSection() || parseAbsoluteExpression(NumValues) || | ||||||
4850 | parseEOL()) | ||||||
4851 | return true; | ||||||
4852 | |||||||
4853 | if (NumValues < 0) { | ||||||
4854 | Warning(NumValuesLoc, "'" + Twine(IDVal) + "' directive with negative repeat count has no effect"); | ||||||
4855 | return false; | ||||||
4856 | } | ||||||
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 | |||||||
4896 | if (discardLTOSymbol(Name)) | ||||||
4897 | return false; | ||||||
4898 | |||||||
4899 | MCSymbol *Sym = getContext().getOrCreateSymbol(Name); | ||||||
4900 | |||||||
4901 | // Assembler local symbols don't make any sense here. Complain loudly. | ||||||
4902 | if (Sym->isTemporary()) | ||||||
4903 | return Error(Loc, "non-local symbol required"); | ||||||
4904 | |||||||
4905 | if (!getStreamer().emitSymbolAttribute(Sym, Attr)) | ||||||
4906 | return Error(Loc, "unable to emit symbol attribute"); | ||||||
4907 | return false; | ||||||
4908 | }; | ||||||
4909 | |||||||
4910 | if (parseMany(parseOp)) | ||||||
4911 | return addErrorSuffix(" in directive"); | ||||||
4912 | return false; | ||||||
4913 | } | ||||||
4914 | |||||||
4915 | /// parseDirectiveComm | ||||||
4916 | /// ::= ( .comm | .lcomm ) identifier , size_expression [ , align_expression ] | ||||||
4917 | bool AsmParser::parseDirectiveComm(bool IsLocal) { | ||||||
4918 | if (checkForValidSection()) | ||||||
4919 | return true; | ||||||
4920 | |||||||
4921 | SMLoc IDLoc = getLexer().getLoc(); | ||||||
4922 | StringRef Name; | ||||||
4923 | if (parseIdentifier(Name)) | ||||||
4924 | return TokError("expected identifier in directive"); | ||||||
4925 | |||||||
4926 | // Handle the identifier as the key symbol. | ||||||
4927 | MCSymbol *Sym = getContext().getOrCreateSymbol(Name); | ||||||
4928 | |||||||
4929 | if (getLexer().isNot(AsmToken::Comma)) | ||||||
4930 | return TokError("unexpected token in directive"); | ||||||
4931 | Lex(); | ||||||
4932 | |||||||
4933 | int64_t Size; | ||||||
4934 | SMLoc SizeLoc = getLexer().getLoc(); | ||||||
4935 | if (parseAbsoluteExpression(Size)) | ||||||
4936 | return true; | ||||||
4937 | |||||||
4938 | int64_t Pow2Alignment = 0; | ||||||
4939 | SMLoc Pow2AlignmentLoc; | ||||||
4940 | if (getLexer().is(AsmToken::Comma)) { | ||||||
4941 | Lex(); | ||||||
4942 | Pow2AlignmentLoc = getLexer().getLoc(); | ||||||
4943 | if (parseAbsoluteExpression(Pow2Alignment)) | ||||||
4944 | return true; | ||||||
4945 | |||||||
4946 | LCOMM::LCOMMType LCOMM = Lexer.getMAI().getLCOMMDirectiveAlignmentType(); | ||||||
4947 | if (IsLocal && LCOMM == LCOMM::NoAlignment) | ||||||
4948 | return Error(Pow2AlignmentLoc, "alignment not supported on this target"); | ||||||
4949 | |||||||
4950 | // If this target takes alignments in bytes (not log) validate and convert. | ||||||
4951 | if ((!IsLocal && Lexer.getMAI().getCOMMDirectiveAlignmentIsInBytes()) || | ||||||
4952 | (IsLocal && LCOMM == LCOMM::ByteAlignment)) { | ||||||
4953 | if (!isPowerOf2_64(Pow2Alignment)) | ||||||
4954 | return Error(Pow2AlignmentLoc, "alignment must be a power of 2"); | ||||||
4955 | Pow2Alignment = Log2_64(Pow2Alignment); | ||||||
4956 | } | ||||||
4957 | } | ||||||
4958 | |||||||
4959 | if (parseEOL()) | ||||||
4960 | return true; | ||||||
4961 | |||||||
4962 | // NOTE: a size of zero for a .comm should create a undefined symbol | ||||||
4963 | // but a size of .lcomm creates a bss symbol of size zero. | ||||||
4964 | if (Size < 0) | ||||||
4965 | return Error(SizeLoc, "invalid '.comm' or '.lcomm' directive size, can't " | ||||||
4966 | "be less than zero"); | ||||||
4967 | |||||||
4968 | // NOTE: The alignment in the directive is a power of 2 value, the assembler | ||||||
4969 | // may internally end up wanting an alignment in bytes. | ||||||
4970 | // FIXME: Diagnose overflow. | ||||||
4971 | if (Pow2Alignment < 0) | ||||||
4972 | return Error(Pow2AlignmentLoc, "invalid '.comm' or '.lcomm' directive " | ||||||
4973 | "alignment, can't be less than zero"); | ||||||
4974 | |||||||
4975 | Sym->redefineIfPossible(); | ||||||
4976 | if (!Sym->isUndefined()) | ||||||
4977 | return Error(IDLoc, "invalid symbol redefinition"); | ||||||
4978 | |||||||
4979 | // Create the Symbol as a common or local common with Size and Pow2Alignment | ||||||
4980 | if (IsLocal) { | ||||||
4981 | getStreamer().emitLocalCommonSymbol(Sym, Size, 1 << Pow2Alignment); | ||||||
4982 | return false; | ||||||
4983 | } | ||||||
4984 | |||||||
4985 | getStreamer().emitCommonSymbol(Sym, Size, 1 << Pow2Alignment); | ||||||
4986 | return false; | ||||||
4987 | } | ||||||
4988 | |||||||
4989 | /// parseDirectiveAbort | ||||||
4990 | /// ::= .abort [... message ...] | ||||||
4991 | bool AsmParser::parseDirectiveAbort() { | ||||||
4992 | // FIXME: Use loc from directive. | ||||||
4993 | SMLoc Loc = getLexer().getLoc(); | ||||||
4994 | |||||||
4995 | StringRef Str = parseStringToEndOfStatement(); | ||||||
4996 | if (parseEOL()) | ||||||
4997 | return true; | ||||||
4998 | |||||||
4999 | if (Str.empty()) | ||||||
5000 | return Error(Loc, ".abort detected. Assembly stopping."); | ||||||
5001 | else | ||||||
5002 | return Error(Loc, ".abort '" + Str + "' detected. Assembly stopping."); | ||||||
5003 | // FIXME: Actually abort assembly here. | ||||||
5004 | |||||||
5005 | return false; | ||||||
5006 | } | ||||||
5007 | |||||||
5008 | /// parseDirectiveInclude | ||||||
5009 | /// ::= .include "filename" | ||||||
5010 | bool AsmParser::parseDirectiveInclude() { | ||||||
5011 | // Allow the strings to have escaped octal character sequence. | ||||||
5012 | std::string Filename; | ||||||
5013 | SMLoc IncludeLoc = getTok().getLoc(); | ||||||
5014 | |||||||
5015 | if (check(getTok().isNot(AsmToken::String), | ||||||
5016 | "expected string in '.include' directive") || | ||||||
5017 | parseEscapedString(Filename) || | ||||||
5018 | check(getTok().isNot(AsmToken::EndOfStatement), | ||||||
5019 | "unexpected token in '.include' directive") || | ||||||
5020 | // Attempt to switch the lexer to the included file before consuming the | ||||||
5021 | // end of statement to avoid losing it when we switch. | ||||||
5022 | check(enterIncludeFile(Filename), IncludeLoc, | ||||||
5023 | "Could not find include file '" + Filename + "'")) | ||||||
5024 | return true; | ||||||
5025 | |||||||
5026 | return false; | ||||||
5027 | } | ||||||
5028 | |||||||
5029 | /// parseDirectiveIncbin | ||||||
5030 | /// ::= .incbin "filename" [ , skip [ , count ] ] | ||||||
5031 | bool AsmParser::parseDirectiveIncbin() { | ||||||
5032 | // Allow the strings to have escaped octal character sequence. | ||||||
5033 | std::string Filename; | ||||||
5034 | SMLoc IncbinLoc = getTok().getLoc(); | ||||||
5035 | if (check(getTok().isNot(AsmToken::String), | ||||||
5036 | "expected string in '.incbin' directive") || | ||||||
5037 | parseEscapedString(Filename)) | ||||||
5038 | return true; | ||||||
5039 | |||||||
5040 | int64_t Skip = 0; | ||||||
5041 | const MCExpr *Count = nullptr; | ||||||
5042 | SMLoc SkipLoc, CountLoc; | ||||||
5043 | if (parseOptionalToken(AsmToken::Comma)) { | ||||||
5044 | // The skip expression can be omitted while specifying the count, e.g: | ||||||
5045 | // .incbin "filename",,4 | ||||||
5046 | if (getTok().isNot(AsmToken::Comma)) { | ||||||
5047 | if (parseTokenLoc(SkipLoc) || parseAbsoluteExpression(Skip)) | ||||||
5048 | return true; | ||||||
5049 | } | ||||||
5050 | if (parseOptionalToken(AsmToken::Comma)) { | ||||||
5051 | CountLoc = getTok().getLoc(); | ||||||
5052 | if (parseExpression(Count)) | ||||||
5053 | return true; | ||||||
5054 | } | ||||||
5055 | } | ||||||
5056 | |||||||
5057 | if (parseEOL()) | ||||||
5058 | return true; | ||||||
5059 | |||||||
5060 | if (check(Skip < 0, SkipLoc, "skip is negative")) | ||||||
5061 | return true; | ||||||
5062 | |||||||
5063 | // Attempt to process the included file. | ||||||
5064 | if (processIncbinFile(Filename, Skip, Count, CountLoc)) | ||||||
5065 | return Error(IncbinLoc, "Could not find incbin file '" + Filename + "'"); | ||||||
5066 | return false; | ||||||
5067 | } | ||||||
5068 | |||||||
5069 | /// parseDirectiveIf | ||||||
5070 | /// ::= .if{,eq,ge,gt,le,lt,ne} expression | ||||||
5071 | bool AsmParser::parseDirectiveIf(SMLoc DirectiveLoc, DirectiveKind DirKind) { | ||||||
5072 | TheCondStack.push_back(TheCondState); | ||||||
5073 | TheCondState.TheCond = AsmCond::IfCond; | ||||||
5074 | if (TheCondState.Ignore) { | ||||||
5075 | eatToEndOfStatement(); | ||||||
5076 | } else { | ||||||
5077 | int64_t ExprValue; | ||||||
5078 | if (parseAbsoluteExpression(ExprValue) || parseEOL()) | ||||||
5079 | return true; | ||||||
5080 | |||||||
5081 | switch (DirKind) { | ||||||
5082 | default: | ||||||
5083 | llvm_unreachable("unsupported directive")::llvm::llvm_unreachable_internal("unsupported directive", "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/llvm/lib/MC/MCParser/AsmParser.cpp" , 5083); | ||||||
5084 | case DK_IF: | ||||||
5085 | case DK_IFNE: | ||||||
5086 | break; | ||||||
5087 | case DK_IFEQ: | ||||||
5088 | ExprValue = ExprValue == 0; | ||||||
5089 | break; | ||||||
5090 | case DK_IFGE: | ||||||
5091 | ExprValue = ExprValue >= 0; | ||||||
5092 | break; | ||||||
5093 | case DK_IFGT: | ||||||
5094 | ExprValue = ExprValue > 0; | ||||||
5095 | break; | ||||||
5096 | case DK_IFLE: | ||||||
5097 | ExprValue = ExprValue <= 0; | ||||||
5098 | break; | ||||||
5099 | case DK_IFLT: | ||||||
5100 | ExprValue = ExprValue < 0; | ||||||
5101 | break; | ||||||
5102 | } | ||||||
5103 | |||||||
5104 | TheCondState.CondMet = ExprValue; | ||||||
5105 | TheCondState.Ignore = !TheCondState.CondMet; | ||||||
5106 | } | ||||||
5107 | |||||||
5108 | return false; | ||||||
5109 | } | ||||||
5110 | |||||||
5111 | /// parseDirectiveIfb | ||||||
5112 | /// ::= .ifb string | ||||||
5113 | bool AsmParser::parseDirectiveIfb(SMLoc DirectiveLoc, bool ExpectBlank) { | ||||||
5114 | TheCondStack.push_back(TheCondState); | ||||||
5115 | TheCondState.TheCond = AsmCond::IfCond; | ||||||
5116 | |||||||
5117 | if (TheCondState.Ignore) { | ||||||
5118 | eatToEndOfStatement(); | ||||||
5119 | } else { | ||||||
5120 | StringRef Str = parseStringToEndOfStatement(); | ||||||
5121 | |||||||
5122 | if (parseEOL()) | ||||||
5123 | return true; | ||||||
5124 | |||||||
5125 | TheCondState.CondMet = ExpectBlank == Str.empty(); | ||||||
5126 | TheCondState.Ignore = !TheCondState.CondMet; | ||||||
5127 | } | ||||||
5128 | |||||||
5129 | return false; | ||||||
5130 | } | ||||||
5131 | |||||||
5132 | /// parseDirectiveIfc | ||||||
5133 | /// ::= .ifc string1, string2 | ||||||
5134 | /// ::= .ifnc string1, string2 | ||||||
5135 | bool AsmParser::parseDirectiveIfc(SMLoc DirectiveLoc, bool ExpectEqual) { | ||||||
5136 | TheCondStack.push_back(TheCondState); | ||||||
5137 | TheCondState.TheCond = AsmCond::IfCond; | ||||||
5138 | |||||||
5139 | if (TheCondState.Ignore) { | ||||||
5140 | eatToEndOfStatement(); | ||||||
5141 | } else { | ||||||
5142 | StringRef Str1 = parseStringToComma(); | ||||||
5143 | |||||||
5144 | if (parseToken(AsmToken::Comma, "unexpected token in '.ifc' directive")) | ||||||
5145 | return true; | ||||||
5146 | |||||||
5147 | StringRef Str2 = parseStringToEndOfStatement(); | ||||||
5148 | |||||||
5149 | if (parseEOL()) | ||||||
5150 | return true; | ||||||
5151 | |||||||
5152 | TheCondState.CondMet = ExpectEqual == (Str1.trim() == Str2.trim()); | ||||||
5153 | TheCondState.Ignore = !TheCondState.CondMet; | ||||||
5154 | } | ||||||
5155 | |||||||
5156 | return false; | ||||||
5157 | } | ||||||
5158 | |||||||
5159 | /// parseDirectiveIfeqs | ||||||
5160 | /// ::= .ifeqs string1, string2 | ||||||
5161 | bool AsmParser::parseDirectiveIfeqs(SMLoc DirectiveLoc, bool ExpectEqual) { | ||||||
5162 | if (Lexer.isNot(AsmToken::String)) { | ||||||
5163 | if (ExpectEqual) | ||||||
5164 | return TokError("expected string parameter for '.ifeqs' directive"); | ||||||
5165 | return TokError("expected string parameter for '.ifnes' directive"); | ||||||
5166 | } | ||||||
5167 | |||||||
5168 | StringRef String1 = getTok().getStringContents(); | ||||||
5169 | Lex(); | ||||||
5170 | |||||||
5171 | if (Lexer.isNot(AsmToken::Comma)) { | ||||||
5172 | if (ExpectEqual) | ||||||
5173 | return TokError( | ||||||
5174 | "expected comma after first string for '.ifeqs' directive"); | ||||||
5175 | return TokError("expected comma after first string for '.ifnes' directive"); | ||||||
5176 | } | ||||||
5177 | |||||||
5178 | Lex(); | ||||||
5179 | |||||||
5180 | if (Lexer.isNot(AsmToken::String)) { | ||||||
5181 | if (ExpectEqual) | ||||||
5182 | return TokError("expected string parameter for '.ifeqs' directive"); | ||||||
5183 | return TokError("expected string parameter for '.ifnes' directive"); | ||||||
5184 | } | ||||||
5185 | |||||||
5186 | StringRef String2 = getTok().getStringContents(); | ||||||
5187 | Lex(); | ||||||
5188 | |||||||
5189 | TheCondStack.push_back(TheCondState); | ||||||
5190 | TheCondState.TheCond = AsmCond::IfCond; | ||||||
5191 | TheCondState.CondMet = ExpectEqual == (String1 == String2); | ||||||
5192 | TheCondState.Ignore = !TheCondState.CondMet; | ||||||
5193 | |||||||
5194 | return false; | ||||||
5195 | } | ||||||
5196 | |||||||
5197 | /// parseDirectiveIfdef | ||||||
5198 | /// ::= .ifdef symbol | ||||||
5199 | bool AsmParser::parseDirectiveIfdef(SMLoc DirectiveLoc, bool expect_defined) { | ||||||
5200 | StringRef Name; | ||||||
5201 | TheCondStack.push_back(TheCondState); | ||||||
5202 | TheCondState.TheCond = AsmCond::IfCond; | ||||||
5203 | |||||||
5204 | if (TheCondState.Ignore) { | ||||||
5205 | eatToEndOfStatement(); | ||||||
5206 | } else { | ||||||
5207 | if (check(parseIdentifier(Name), "expected identifier after '.ifdef'") || | ||||||
5208 | parseEOL()) | ||||||
5209 | return true; | ||||||
5210 | |||||||
5211 | MCSymbol *Sym = getContext().lookupSymbol(Name); | ||||||
5212 | |||||||
5213 | if (expect_defined) | ||||||
5214 | TheCondState.CondMet = (Sym && !Sym->isUndefined(false)); | ||||||
5215 | else | ||||||
5216 | TheCondState.CondMet = (!Sym || Sym->isUndefined(false)); | ||||||
5217 | TheCondState.Ignore = !TheCondState.CondMet; | ||||||
5218 | } | ||||||
5219 | |||||||
5220 | return false; | ||||||
5221 | } | ||||||
5222 | |||||||
5223 | /// parseDirectiveElseIf | ||||||
5224 | /// ::= .elseif expression | ||||||
5225 | bool AsmParser::parseDirectiveElseIf(SMLoc DirectiveLoc) { | ||||||
5226 | if (TheCondState.TheCond != AsmCond::IfCond && | ||||||
5227 | TheCondState.TheCond != AsmCond::ElseIfCond) | ||||||
5228 | return Error(DirectiveLoc, "Encountered a .elseif that doesn't follow an" | ||||||
5229 | " .if or an .elseif"); | ||||||
5230 | TheCondState.TheCond = AsmCond::ElseIfCond; | ||||||
5231 | |||||||
5232 | bool LastIgnoreState = false; | ||||||
5233 | if (!TheCondStack.empty()) | ||||||
5234 | LastIgnoreState = TheCondStack.back().Ignore; | ||||||
5235 | if (LastIgnoreState || TheCondState.CondMet) { | ||||||
5236 | TheCondState.Ignore = true; | ||||||
5237 | eatToEndOfStatement(); | ||||||
5238 | } else { | ||||||
5239 | int64_t ExprValue; | ||||||
5240 | if (parseAbsoluteExpression(ExprValue)) | ||||||
5241 | return true; | ||||||
5242 | |||||||
5243 | if (parseEOL()) | ||||||
5244 | return true; | ||||||
5245 | |||||||
5246 | TheCondState.CondMet = ExprValue; | ||||||
5247 | TheCondState.Ignore = !TheCondState.CondMet; | ||||||
5248 | } | ||||||
5249 | |||||||
5250 | return false; | ||||||
5251 | } | ||||||
5252 | |||||||
5253 | /// parseDirectiveElse | ||||||
5254 | /// ::= .else | ||||||
5255 | bool AsmParser::parseDirectiveElse(SMLoc DirectiveLoc) { | ||||||
5256 | if (parseEOL()) | ||||||
5257 | return true; | ||||||
5258 | |||||||
5259 | if (TheCondState.TheCond != AsmCond::IfCond && | ||||||
5260 | TheCondState.TheCond != AsmCond::ElseIfCond) | ||||||
5261 | return Error(DirectiveLoc, "Encountered a .else that doesn't follow " | ||||||
5262 | " an .if or an .elseif"); | ||||||
5263 | TheCondState.TheCond = AsmCond::ElseCond; | ||||||
5264 | bool LastIgnoreState = false; | ||||||
5265 | if (!TheCondStack.empty()) | ||||||
5266 | LastIgnoreState = TheCondStack.back().Ignore; | ||||||
5267 | if (LastIgnoreState || TheCondState.CondMet) | ||||||
5268 | TheCondState.Ignore = true; | ||||||
5269 | else | ||||||
5270 | TheCondState.Ignore = false; | ||||||
5271 | |||||||
5272 | return false; | ||||||
5273 | } | ||||||
5274 | |||||||
5275 | /// parseDirectiveEnd | ||||||
5276 | /// ::= .end | ||||||
5277 | bool AsmParser::parseDirectiveEnd(SMLoc DirectiveLoc) { | ||||||
5278 | if (parseEOL()) | ||||||
5279 | return true; | ||||||
5280 | |||||||
5281 | while (Lexer.isNot(AsmToken::Eof)) | ||||||
5282 | Lexer.Lex(); | ||||||
5283 | |||||||
5284 | return false; | ||||||
5285 | } | ||||||
5286 | |||||||
5287 | /// parseDirectiveError | ||||||
5288 | /// ::= .err | ||||||
5289 | /// ::= .error [string] | ||||||
5290 | bool AsmParser::parseDirectiveError(SMLoc L, bool WithMessage) { | ||||||
5291 | if (!TheCondStack.empty()) { | ||||||
5292 | if (TheCondStack.back().Ignore) { | ||||||
5293 | eatToEndOfStatement(); | ||||||
5294 | return false; | ||||||
5295 | } | ||||||
5296 | } | ||||||
5297 | |||||||
5298 | if (!WithMessage) | ||||||
5299 | return Error(L, ".err encountered"); | ||||||
5300 | |||||||
5301 | StringRef Message = ".error directive invoked in source file"; | ||||||
5302 | if (Lexer.isNot(AsmToken::EndOfStatement)) { | ||||||
5303 | if (Lexer.isNot(AsmToken::String)) | ||||||
5304 | return TokError(".error argument must be a string"); | ||||||
5305 | |||||||
5306 | Message = getTok().getStringContents(); | ||||||
5307 | Lex(); | ||||||
5308 | } | ||||||
5309 | |||||||
5310 | return Error(L, Message); | ||||||
5311 | } | ||||||
5312 | |||||||
5313 | /// parseDirectiveWarning | ||||||
5314 | /// ::= .warning [string] | ||||||
5315 | bool AsmParser::parseDirectiveWarning(SMLoc L) { | ||||||
5316 | if (!TheCondStack.empty()) { | ||||||
5317 | if (TheCondStack.back().Ignore) { | ||||||
5318 | eatToEndOfStatement(); | ||||||
5319 | return false; | ||||||
5320 | } | ||||||
5321 | } | ||||||
5322 | |||||||
5323 | StringRef Message = ".warning directive invoked in source file"; | ||||||
5324 | |||||||
5325 | if (!parseOptionalToken(AsmToken::EndOfStatement)) { | ||||||
5326 | if (Lexer.isNot(AsmToken::String)) | ||||||
5327 | return TokError(".warning argument must be a string"); | ||||||
5328 | |||||||
5329 | Message = getTok().getStringContents(); | ||||||
5330 | Lex(); | ||||||
5331 | if (parseEOL()) | ||||||
5332 | return true; | ||||||
5333 | } | ||||||
5334 | |||||||
5335 | return Warning(L, Message); | ||||||
5336 | } | ||||||
5337 | |||||||
5338 | /// parseDirectiveEndIf | ||||||
5339 | /// ::= .endif | ||||||
5340 | bool AsmParser::parseDirectiveEndIf(SMLoc DirectiveLoc) { | ||||||
5341 | if (parseEOL()) | ||||||
5342 | return true; | ||||||
5343 | |||||||
5344 | if ((TheCondState.TheCond == AsmCond::NoCond) || TheCondStack.empty()) | ||||||
5345 | return Error(DirectiveLoc, "Encountered a .endif that doesn't follow " | ||||||
5346 | "an .if or .else"); | ||||||
5347 | if (!TheCondStack.empty()) { | ||||||
5348 | TheCondState = TheCondStack.back(); | ||||||
5349 | TheCondStack.pop_back(); | ||||||
5350 | } | ||||||
5351 | |||||||
5352 | return false; | ||||||
5353 | } | ||||||
5354 | |||||||
5355 | void AsmParser::initializeDirectiveKindMap() { | ||||||
5356 | /* Lookup will be done with the directive | ||||||
5357 | * converted to lower case, so all these | ||||||
5358 | * keys should be lower case. | ||||||
5359 | * (target specific directives are handled | ||||||
5360 | * elsewhere) | ||||||
5361 | */ | ||||||
5362 | DirectiveKindMap[".set"] = DK_SET; | ||||||
5363 | DirectiveKindMap[".equ"] = DK_EQU; | ||||||
5364 | DirectiveKindMap[".equiv"] = DK_EQUIV; | ||||||
5365 | DirectiveKindMap[".ascii"] = DK_ASCII; | ||||||
5366 | DirectiveKindMap[".asciz"] = DK_ASCIZ; | ||||||
5367 | DirectiveKindMap[".string"] = DK_STRING; | ||||||
5368 | DirectiveKindMap[".byte"] = DK_BYTE; | ||||||
5369 | DirectiveKindMap[".short"] = DK_SHORT; | ||||||
5370 | DirectiveKindMap[".value"] = DK_VALUE; | ||||||
5371 | DirectiveKindMap[".2byte"] = DK_2BYTE; | ||||||
5372 | DirectiveKindMap[".long"] = DK_LONG; | ||||||
5373 | DirectiveKindMap[".int"] = DK_INT; | ||||||
5374 | DirectiveKindMap[".4byte"] = DK_4BYTE; | ||||||
5375 | DirectiveKindMap[".quad"] = DK_QUAD; | ||||||
5376 | DirectiveKindMap[".8byte"] = DK_8BYTE; | ||||||
5377 | DirectiveKindMap[".octa"] = DK_OCTA; | ||||||
5378 | DirectiveKindMap[".single"] = DK_SINGLE; | ||||||
5379 | DirectiveKindMap[".float"] = DK_FLOAT; | ||||||
5380 | DirectiveKindMap[".double"] = DK_DOUBLE; | ||||||
5381 | DirectiveKindMap[".align"] = DK_ALIGN; | ||||||
5382 | DirectiveKindMap[".align32"] = DK_ALIGN32; | ||||||
5383 | DirectiveKindMap[".balign"] = DK_BALIGN; | ||||||
5384 | DirectiveKindMap[".balignw"] = DK_BALIGNW; | ||||||
5385 | DirectiveKindMap[".balignl"] = DK_BALIGNL; | ||||||
5386 | DirectiveKindMap[".p2align"] = DK_P2ALIGN; | ||||||
5387 | DirectiveKindMap[".p2alignw"] = DK_P2ALIGNW; | ||||||
5388 | DirectiveKindMap[".p2alignl"] = DK_P2ALIGNL; | ||||||
5389 | DirectiveKindMap[".org"] = DK_ORG; | ||||||
5390 | DirectiveKindMap[".fill"] = DK_FILL; | ||||||
5391 | DirectiveKindMap[".zero"] = DK_ZERO; | ||||||
5392 | DirectiveKindMap[".extern"] = DK_EXTERN; | ||||||
5393 | DirectiveKindMap[".globl"] = DK_GLOBL; | ||||||
5394 | DirectiveKindMap[".global"] = DK_GLOBAL; | ||||||
5395 | DirectiveKindMap[".lazy_reference"] = DK_LAZY_REFERENCE; | ||||||
5396 | DirectiveKindMap[".no_dead_strip"] = DK_NO_DEAD_STRIP; | ||||||
5397 | DirectiveKindMap[".symbol_resolver"] = DK_SYMBOL_RESOLVER; | ||||||
5398 | DirectiveKindMap[".private_extern"] = DK_PRIVATE_EXTERN; | ||||||
5399 | DirectiveKindMap[".reference"] = DK_REFERENCE; | ||||||
5400 | DirectiveKindMap[".weak_definition"] = DK_WEAK_DEFINITION; | ||||||
5401 | DirectiveKindMap[".weak_reference"] = DK_WEAK_REFERENCE; | ||||||
5402 | DirectiveKindMap[".weak_def_can_be_hidden"] = DK_WEAK_DEF_CAN_BE_HIDDEN; | ||||||
5403 | DirectiveKindMap[".cold"] = DK_COLD; | ||||||
5404 | DirectiveKindMap[".comm"] = DK_COMM; | ||||||
5405 | DirectiveKindMap[".common"] = DK_COMMON; | ||||||
5406 | DirectiveKindMap[".lcomm"] = DK_LCOMM; | ||||||
5407 | DirectiveKindMap[".abort"] = DK_ABORT; | ||||||
5408 | DirectiveKindMap[".include"] = DK_INCLUDE; | ||||||
5409 | DirectiveKindMap[".incbin"] = DK_INCBIN; | ||||||
5410 | DirectiveKindMap[".code16"] = DK_CODE16; | ||||||
5411 | DirectiveKindMap[".code16gcc"] = DK_CODE16GCC; | ||||||
5412 | DirectiveKindMap[".rept"] = DK_REPT; | ||||||
5413 | DirectiveKindMap[".rep"] = DK_REPT; | ||||||
5414 | DirectiveKindMap[".irp"] = DK_IRP; | ||||||
5415 | DirectiveKindMap[".irpc"] = DK_IRPC; | ||||||
5416 | DirectiveKindMap[".endr"] = DK_ENDR; | ||||||
5417 | DirectiveKindMap[".bundle_align_mode"] = DK_BUNDLE_ALIGN_MODE; | ||||||
5418 | DirectiveKindMap[".bundle_lock"] = DK_BUNDLE_LOCK; | ||||||
5419 | DirectiveKindMap[".bundle_unlock"] = DK_BUNDLE_UNLOCK; | ||||||
5420 | DirectiveKindMap[".if"] = DK_IF; | ||||||
5421 | DirectiveKindMap[".ifeq"] = DK_IFEQ; | ||||||
5422 | DirectiveKindMap[".ifge"] = DK_IFGE; | ||||||
5423 | DirectiveKindMap[".ifgt"] = DK_IFGT; | ||||||
5424 | DirectiveKindMap[".ifle"] = DK_IFLE; | ||||||
5425 | DirectiveKindMap[".iflt"] = DK_IFLT; | ||||||
5426 | DirectiveKindMap[".ifne"] = DK_IFNE; | ||||||
5427 | DirectiveKindMap[".ifb"] = DK_IFB; | ||||||
5428 | DirectiveKindMap[".ifnb"] = DK_IFNB; | ||||||
5429 | DirectiveKindMap[".ifc"] = DK_IFC; | ||||||
5430 | DirectiveKindMap[".ifeqs"] = DK_IFEQS; | ||||||
5431 | DirectiveKindMap[".ifnc"] = DK_IFNC; | ||||||
5432 | DirectiveKindMap[".ifnes"] = DK_IFNES; | ||||||
5433 | DirectiveKindMap[".ifdef"] = DK_IFDEF; | ||||||
5434 | DirectiveKindMap[".ifndef"] = DK_IFNDEF; | ||||||
5435 | DirectiveKindMap[".ifnotdef"] = DK_IFNOTDEF; | ||||||
5436 | DirectiveKindMap[".elseif"] = DK_ELSEIF; | ||||||
5437 | DirectiveKindMap[".else"] = DK_ELSE; | ||||||
5438 | DirectiveKindMap[".end"] = DK_END; | ||||||
5439 | DirectiveKindMap[".endif"] = DK_ENDIF; | ||||||
5440 | DirectiveKindMap[".skip"] = DK_SKIP; | ||||||
5441 | DirectiveKindMap[".space"] = DK_SPACE; | ||||||
5442 | DirectiveKindMap[".file"] = DK_FILE; | ||||||
5443 | DirectiveKindMap[".line"] = DK_LINE; | ||||||
5444 | DirectiveKindMap[".loc"] = DK_LOC; | ||||||
5445 | DirectiveKindMap[".stabs"] = DK_STABS; | ||||||
5446 | DirectiveKindMap[".cv_file"] = DK_CV_FILE; | ||||||
5447 | DirectiveKindMap[".cv_func_id"] = DK_CV_FUNC_ID; | ||||||
5448 | DirectiveKindMap[".cv_loc"] = DK_CV_LOC; | ||||||
5449 | DirectiveKindMap[".cv_linetable"] = DK_CV_LINETABLE; | ||||||
5450 | DirectiveKindMap[".cv_inline_linetable"] = DK_CV_INLINE_LINETABLE; | ||||||
5451 | DirectiveKindMap[".cv_inline_site_id"] = DK_CV_INLINE_SITE_ID; | ||||||
5452 | DirectiveKindMap[".cv_def_range"] = DK_CV_DEF_RANGE; | ||||||
5453 | DirectiveKindMap[".cv_string"] = DK_CV_STRING; | ||||||
5454 | DirectiveKindMap[".cv_stringtable"] = DK_CV_STRINGTABLE; | ||||||
5455 | DirectiveKindMap[".cv_filechecksums"] = DK_CV_FILECHECKSUMS; | ||||||
5456 | DirectiveKindMap[".cv_filechecksumoffset"] = DK_CV_FILECHECKSUM_OFFSET; | ||||||
5457 | DirectiveKindMap[".cv_fpo_data"] = DK_CV_FPO_DATA; | ||||||
5458 | DirectiveKindMap[".sleb128"] = DK_SLEB128; | ||||||
5459 | DirectiveKindMap[".uleb128"] = DK_ULEB128; | ||||||
5460 | DirectiveKindMap[".cfi_sections"] = DK_CFI_SECTIONS; | ||||||
5461 | DirectiveKindMap[".cfi_startproc"] = DK_CFI_STARTPROC; | ||||||
5462 | DirectiveKindMap[".cfi_endproc"] = DK_CFI_ENDPROC; | ||||||
5463 | DirectiveKindMap[".cfi_def_cfa"] = DK_CFI_DEF_CFA; | ||||||
5464 | DirectiveKindMap[".cfi_def_cfa_offset"] = DK_CFI_DEF_CFA_OFFSET; | ||||||
5465 | DirectiveKindMap[".cfi_adjust_cfa_offset"] = DK_CFI_ADJUST_CFA_OFFSET; | ||||||
5466 | DirectiveKindMap[".cfi_def_cfa_register"] = DK_CFI_DEF_CFA_REGISTER; | ||||||
5467 | DirectiveKindMap[".cfi_offset"] = DK_CFI_OFFSET; | ||||||
5468 | DirectiveKindMap[".cfi_rel_offset"] = DK_CFI_REL_OFFSET; | ||||||
5469 | DirectiveKindMap[".cfi_personality"] = DK_CFI_PERSONALITY; | ||||||
5470 | DirectiveKindMap[".cfi_lsda"] = DK_CFI_LSDA; | ||||||
5471 | DirectiveKindMap[".cfi_remember_state"] = DK_CFI_REMEMBER_STATE; | ||||||
5472 | DirectiveKindMap[".cfi_restore_state"] = DK_CFI_RESTORE_STATE; | ||||||
5473 | DirectiveKindMap[".cfi_same_value"] = DK_CFI_SAME_VALUE; | ||||||
5474 | DirectiveKindMap[".cfi_restore"] = DK_CFI_RESTORE; | ||||||
5475 | DirectiveKindMap[".cfi_escape"] = DK_CFI_ESCAPE; | ||||||
5476 | DirectiveKindMap[".cfi_return_column"] = DK_CFI_RETURN_COLUMN; | ||||||
5477 | DirectiveKindMap[".cfi_signal_frame"] = DK_CFI_SIGNAL_FRAME; | ||||||
5478 | DirectiveKindMap[".cfi_undefined"] = DK_CFI_UNDEFINED; | ||||||
5479 | DirectiveKindMap[".cfi_register"] = DK_CFI_REGISTER; | ||||||
5480 | DirectiveKindMap[".cfi_window_save"] = DK_CFI_WINDOW_SAVE; | ||||||
5481 | DirectiveKindMap[".cfi_b_key_frame"] = DK_CFI_B_KEY_FRAME; | ||||||
5482 | DirectiveKindMap[".macros_on"] = DK_MACROS_ON; | ||||||
5483 | DirectiveKindMap[".macros_off"] = DK_MACROS_OFF; | ||||||
5484 | DirectiveKindMap[".macro"] = DK_MACRO; | ||||||
5485 | DirectiveKindMap[".exitm"] = DK_EXITM; | ||||||
5486 | DirectiveKindMap[".endm"] = DK_ENDM; | ||||||
5487 | DirectiveKindMap[".endmacro"] = DK_ENDMACRO; | ||||||
5488 | DirectiveKindMap[".purgem"] = DK_PURGEM; | ||||||
5489 | DirectiveKindMap[".err"] = DK_ERR; | ||||||
5490 | DirectiveKindMap[".error"] = DK_ERROR; | ||||||
5491 | DirectiveKindMap[".warning"] = DK_WARNING; | ||||||
5492 | DirectiveKindMap[".altmacro"] = DK_ALTMACRO; | ||||||
5493 | DirectiveKindMap[".noaltmacro"] = DK_NOALTMACRO; | ||||||
5494 | DirectiveKindMap[".reloc"] = DK_RELOC; | ||||||
5495 | DirectiveKindMap[".dc"] = DK_DC; | ||||||
5496 | DirectiveKindMap[".dc.a"] = DK_DC_A; | ||||||
5497 | DirectiveKindMap[".dc.b"] = DK_DC_B; | ||||||
5498 | DirectiveKindMap[".dc.d"] = DK_DC_D; | ||||||
5499 | DirectiveKindMap[".dc.l"] = DK_DC_L; | ||||||
5500 | DirectiveKindMap[".dc.s"] = DK_DC_S; | ||||||
5501 | DirectiveKindMap[".dc.w"] = DK_DC_W; | ||||||
5502 | DirectiveKindMap[".dc.x"] = DK_DC_X; | ||||||
5503 | DirectiveKindMap[".dcb"] = DK_DCB; | ||||||
5504 | DirectiveKindMap[".dcb.b"] = DK_DCB_B; | ||||||
5505 | DirectiveKindMap[".dcb.d"] = DK_DCB_D; | ||||||
5506 | DirectiveKindMap[".dcb.l"] = DK_DCB_L; | ||||||
5507 | DirectiveKindMap[".dcb.s"] = DK_DCB_S; | ||||||
5508 | DirectiveKindMap[".dcb.w"] = DK_DCB_W; | ||||||
5509 | DirectiveKindMap[".dcb.x"] = DK_DCB_X; | ||||||
5510 | DirectiveKindMap[".ds"] = DK_DS; | ||||||
5511 | DirectiveKindMap[".ds.b"] = DK_DS_B; | ||||||
5512 | DirectiveKindMap[".ds.d"] = DK_DS_D; | ||||||
5513 | DirectiveKindMap[".ds.l"] = DK_DS_L; | ||||||
5514 | DirectiveKindMap[".ds.p"] = DK_DS_P; | ||||||
5515 | DirectiveKindMap[".ds.s"] = DK_DS_S; | ||||||
5516 | DirectiveKindMap[".ds.w"] = DK_DS_W; | ||||||
5517 | DirectiveKindMap[".ds.x"] = DK_DS_X; | ||||||
5518 | DirectiveKindMap[".print"] = DK_PRINT; | ||||||
5519 | DirectiveKindMap[".addrsig"] = DK_ADDRSIG; | ||||||
5520 | DirectiveKindMap[".addrsig_sym"] = DK_ADDRSIG_SYM; | ||||||
5521 | DirectiveKindMap[".pseudoprobe"] = DK_PSEUDO_PROBE; | ||||||
5522 | DirectiveKindMap[".lto_discard"] = DK_LTO_DISCARD; | ||||||
5523 | } | ||||||
5524 | |||||||
5525 | MCAsmMacro *AsmParser::parseMacroLikeBody(SMLoc DirectiveLoc) { | ||||||
5526 | AsmToken EndToken, StartToken = getTok(); | ||||||
5527 | |||||||
5528 | unsigned NestLevel = 0; | ||||||
5529 | while (true) { | ||||||
5530 | // Check whether we have reached the end of the file. | ||||||
5531 | if (getLexer().is(AsmToken::Eof)) { | ||||||
5532 | printError(DirectiveLoc, "no matching '.endr' in definition"); | ||||||
5533 | return nullptr; | ||||||
5534 | } | ||||||
5535 | |||||||
5536 | if (Lexer.is(AsmToken::Identifier) && | ||||||
5537 | (getTok().getIdentifier() == ".rep" || | ||||||
5538 | getTok().getIdentifier() == ".rept" || | ||||||
5539 | getTok().getIdentifier() == ".irp" || | ||||||
5540 | getTok().getIdentifier() == ".irpc")) { | ||||||
5541 | ++NestLevel; | ||||||
5542 | } | ||||||
5543 | |||||||
5544 | // Otherwise, check whether we have reached the .endr. | ||||||
5545 | if (Lexer.is(AsmToken::Identifier) && getTok().getIdentifier() == ".endr") { | ||||||
5546 | if (NestLevel == 0) { | ||||||
5547 | EndToken = getTok(); | ||||||
5548 | Lex(); | ||||||
5549 | if (Lexer.isNot(AsmToken::EndOfStatement)) { | ||||||
5550 | printError(getTok().getLoc(), | ||||||
5551 | "unexpected token in '.endr' directive"); | ||||||
5552 | return nullptr; | ||||||
5553 | } | ||||||
5554 | break; | ||||||
5555 | } | ||||||
5556 | --NestLevel; | ||||||
5557 | } | ||||||
5558 | |||||||
5559 | // Otherwise, scan till the end of the statement. | ||||||
5560 | eatToEndOfStatement(); | ||||||
5561 | } | ||||||
5562 | |||||||
5563 | const char *BodyStart = StartToken.getLoc().getPointer(); | ||||||
5564 | const char *BodyEnd = EndToken.getLoc().getPointer(); | ||||||
5565 | StringRef Body = StringRef(BodyStart, BodyEnd - BodyStart); | ||||||
5566 | |||||||
5567 | // We Are Anonymous. | ||||||
5568 | MacroLikeBodies.emplace_back(StringRef(), Body, MCAsmMacroParameters()); | ||||||
5569 | return &MacroLikeBodies.back(); | ||||||
5570 | } | ||||||
5571 | |||||||
5572 | void AsmParser::instantiateMacroLikeBody(MCAsmMacro *M, SMLoc DirectiveLoc, | ||||||
5573 | raw_svector_ostream &OS) { | ||||||
5574 | OS << ".endr\n"; | ||||||
5575 | |||||||
5576 | std::unique_ptr<MemoryBuffer> Instantiation = | ||||||
5577 | MemoryBuffer::getMemBufferCopy(OS.str(), "<instantiation>"); | ||||||
5578 | |||||||
5579 | // Create the macro instantiation object and add to the current macro | ||||||
5580 | // instantiation stack. | ||||||
5581 | MacroInstantiation *MI = new MacroInstantiation{ | ||||||
5582 | DirectiveLoc, CurBuffer, getTok().getLoc(), TheCondStack.size()}; | ||||||
5583 | ActiveMacros.push_back(MI); | ||||||
5584 | |||||||
5585 | // Jump to the macro instantiation and prime the lexer. | ||||||
5586 | CurBuffer = SrcMgr.AddNewSourceBuffer(std::move(Instantiation), SMLoc()); | ||||||
5587 | Lexer.setBuffer(SrcMgr.getMemoryBuffer(CurBuffer)->getBuffer()); | ||||||
5588 | Lex(); | ||||||
5589 | } | ||||||
5590 | |||||||
5591 | /// parseDirectiveRept | ||||||
5592 | /// ::= .rep | .rept count | ||||||
5593 | bool AsmParser::parseDirectiveRept(SMLoc DirectiveLoc, StringRef Dir) { | ||||||
5594 | const MCExpr *CountExpr; | ||||||
5595 | SMLoc CountLoc = getTok().getLoc(); | ||||||
5596 | if (parseExpression(CountExpr)) | ||||||
5597 | return true; | ||||||
5598 | |||||||
5599 | int64_t Count; | ||||||
5600 | if (!CountExpr->evaluateAsAbsolute(Count, getStreamer().getAssemblerPtr())) { | ||||||
5601 | return Error(CountLoc, "unexpected token in '" + Dir + "' directive"); | ||||||
5602 | } | ||||||
5603 | |||||||
5604 | if (check(Count < 0, CountLoc, "Count is negative") || parseEOL()) | ||||||
5605 | return true; | ||||||
5606 | |||||||
5607 | // Lex the rept definition. | ||||||
5608 | MCAsmMacro *M = parseMacroLikeBody(DirectiveLoc); | ||||||
5609 | if (!M) | ||||||
5610 | return true; | ||||||
5611 | |||||||
5612 | // Macro instantiation is lexical, unfortunately. We construct a new buffer | ||||||
5613 | // to hold the macro body with substitutions. | ||||||
5614 | SmallString<256> Buf; | ||||||
5615 | raw_svector_ostream OS(Buf); | ||||||
5616 | while (Count--) { | ||||||
5617 | // Note that the AtPseudoVariable is disabled for instantiations of .rep(t). | ||||||
5618 | if (expandMacro(OS, M->Body, None, None, false, getTok().getLoc())) | ||||||
5619 | return true; | ||||||
5620 | } | ||||||
5621 | instantiateMacroLikeBody(M, DirectiveLoc, OS); | ||||||
5622 | |||||||
5623 | return false; | ||||||
5624 | } | ||||||
5625 | |||||||
5626 | /// parseDirectiveIrp | ||||||
5627 | /// ::= .irp symbol,values | ||||||
5628 | bool AsmParser::parseDirectiveIrp(SMLoc DirectiveLoc) { | ||||||
5629 | MCAsmMacroParameter Parameter; | ||||||
5630 | MCAsmMacroArguments A; | ||||||
5631 | if (check(parseIdentifier(Parameter.Name), | ||||||
5632 | "expected identifier in '.irp' directive") || | ||||||
5633 | parseToken(AsmToken::Comma, "expected comma in '.irp' directive") || | ||||||
5634 | parseMacroArguments(nullptr, A) || parseEOL()) | ||||||
5635 | return true; | ||||||
5636 | |||||||
5637 | // Lex the irp definition. | ||||||
5638 | MCAsmMacro *M = parseMacroLikeBody(DirectiveLoc); | ||||||
5639 | if (!M) | ||||||
5640 | return true; | ||||||
5641 | |||||||
5642 | // Macro instantiation is lexical, unfortunately. We construct a new buffer | ||||||
5643 | // to hold the macro body with substitutions. | ||||||
5644 | SmallString<256> Buf; | ||||||
5645 | raw_svector_ostream OS(Buf); | ||||||
5646 | |||||||
5647 | for (const MCAsmMacroArgument &Arg : A) { | ||||||
5648 | // Note that the AtPseudoVariable is enabled for instantiations of .irp. | ||||||
5649 | // This is undocumented, but GAS seems to support it. | ||||||
5650 | if (expandMacro(OS, M->Body, Parameter, Arg, true, getTok().getLoc())) | ||||||
5651 | return true; | ||||||
5652 | } | ||||||
5653 | |||||||
5654 | instantiateMacroLikeBody(M, DirectiveLoc, OS); | ||||||
5655 | |||||||
5656 | return false; | ||||||
5657 | } | ||||||
5658 | |||||||
5659 | /// parseDirectiveIrpc | ||||||
5660 | /// ::= .irpc symbol,values | ||||||
5661 | bool AsmParser::parseDirectiveIrpc(SMLoc DirectiveLoc) { | ||||||
5662 | MCAsmMacroParameter Parameter; | ||||||
5663 | MCAsmMacroArguments A; | ||||||
5664 | |||||||
5665 | if (check(parseIdentifier(Parameter.Name), | ||||||
5666 | "expected identifier in '.irpc' directive") || | ||||||
5667 | parseToken(AsmToken::Comma, "expected comma in '.irpc' directive") || | ||||||
5668 | parseMacroArguments(nullptr, A)) | ||||||
5669 | return true; | ||||||
5670 | |||||||
5671 | if (A.size() != 1 || A.front().size() != 1) | ||||||
5672 | return TokError("unexpected token in '.irpc' directive"); | ||||||
5673 | if (parseEOL()) | ||||||
5674 | return true; | ||||||
5675 | |||||||
5676 | // Lex the irpc definition. | ||||||
5677 | MCAsmMacro *M = parseMacroLikeBody(DirectiveLoc); | ||||||
5678 | if (!M) | ||||||
5679 | return true; | ||||||
5680 | |||||||
5681 | // Macro instantiation is lexical, unfortunately. We construct a new buffer | ||||||
5682 | // to hold the macro body with substitutions. | ||||||
5683 | SmallString<256> Buf; | ||||||
5684 | raw_svector_ostream OS(Buf); | ||||||
5685 | |||||||
5686 | StringRef Values = A.front().front().getString(); | ||||||
5687 | for (std::size_t I = 0, End = Values.size(); I != End; ++I) { | ||||||
5688 | MCAsmMacroArgument Arg; | ||||||
5689 | Arg.emplace_back(AsmToken::Identifier, Values.slice(I, I + 1)); | ||||||
5690 | |||||||
5691 | // Note that the AtPseudoVariable is enabled for instantiations of .irpc. | ||||||
5692 | // This is undocumented, but GAS seems to support it. | ||||||
5693 | if (expandMacro(OS, M->Body, Parameter, Arg, true, getTok().getLoc())) | ||||||
5694 | return true; | ||||||
5695 | } | ||||||
5696 | |||||||
5697 | instantiateMacroLikeBody(M, DirectiveLoc, OS); | ||||||
5698 | |||||||
5699 | return false; | ||||||
5700 | } | ||||||
5701 | |||||||
5702 | bool AsmParser::parseDirectiveEndr(SMLoc DirectiveLoc) { | ||||||
5703 | if (ActiveMacros.empty()) | ||||||
5704 | return TokError("unmatched '.endr' directive"); | ||||||
5705 | |||||||
5706 | // The only .repl that should get here are the ones created by | ||||||
5707 | // instantiateMacroLikeBody. | ||||||
5708 | assert(getLexer().is(AsmToken::EndOfStatement))((getLexer().is(AsmToken::EndOfStatement)) ? static_cast<void > (0) : __assert_fail ("getLexer().is(AsmToken::EndOfStatement)" , "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/llvm/lib/MC/MCParser/AsmParser.cpp" , 5708, __PRETTY_FUNCTION__)); | ||||||
5709 | |||||||
5710 | handleMacroExit(); | ||||||
5711 | return false; | ||||||
5712 | } | ||||||
5713 | |||||||
5714 | bool AsmParser::parseDirectiveMSEmit(SMLoc IDLoc, ParseStatementInfo &Info, | ||||||
5715 | size_t Len) { | ||||||
5716 | const MCExpr *Value; | ||||||
5717 | SMLoc ExprLoc = getLexer().getLoc(); | ||||||
5718 | if (parseExpression(Value)) | ||||||
5719 | return true; | ||||||
5720 | const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Value); | ||||||
5721 | if (!MCE) | ||||||
5722 | return Error(ExprLoc, "unexpected expression in _emit"); | ||||||
5723 | uint64_t IntValue = MCE->getValue(); | ||||||
5724 | if (!isUInt<8>(IntValue) && !isInt<8>(IntValue)) | ||||||
5725 | return Error(ExprLoc, "literal value out of range for directive"); | ||||||
5726 | |||||||
5727 | Info.AsmRewrites->emplace_back(AOK_Emit, IDLoc, Len); | ||||||
5728 | return false; | ||||||
5729 | } | ||||||
5730 | |||||||
5731 | bool AsmParser::parseDirectiveMSAlign(SMLoc IDLoc, ParseStatementInfo &Info) { | ||||||
5732 | const MCExpr *Value; | ||||||
5733 | SMLoc ExprLoc = getLexer().getLoc(); | ||||||
5734 | if (parseExpression(Value)) | ||||||
5735 | return true; | ||||||
5736 | const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Value); | ||||||
5737 | if (!MCE) | ||||||
5738 | return Error(ExprLoc, "unexpected expression in align"); | ||||||
5739 | uint64_t IntValue = MCE->getValue(); | ||||||
5740 | if (!isPowerOf2_64(IntValue)) | ||||||
5741 | return Error(ExprLoc, "literal value not a power of two greater then zero"); | ||||||
5742 | |||||||
5743 | Info.AsmRewrites->emplace_back(AOK_Align, IDLoc, 5, Log2_64(IntValue)); | ||||||
5744 | return false; | ||||||
5745 | } | ||||||
5746 | |||||||
5747 | bool AsmParser::parseDirectivePrint(SMLoc DirectiveLoc) { | ||||||
5748 | const AsmToken StrTok = getTok(); | ||||||
5749 | Lex(); | ||||||
5750 | if (StrTok.isNot(AsmToken::String) || StrTok.getString().front() != '"') | ||||||
5751 | return Error(DirectiveLoc, "expected double quoted string after .print"); | ||||||
5752 | if (parseEOL()) | ||||||
5753 | return true; | ||||||
5754 | llvm::outs() << StrTok.getStringContents() << '\n'; | ||||||
5755 | return false; | ||||||
5756 | } | ||||||
5757 | |||||||
5758 | bool AsmParser::parseDirectiveAddrsig() { | ||||||
5759 | if (parseEOL()) | ||||||
5760 | return true; | ||||||
5761 | getStreamer().emitAddrsig(); | ||||||
5762 | return false; | ||||||
5763 | } | ||||||
5764 | |||||||
5765 | bool AsmParser::parseDirectiveAddrsigSym() { | ||||||
5766 | StringRef Name; | ||||||
5767 | if (check(parseIdentifier(Name), "expected identifier") || parseEOL()) | ||||||
5768 | return true; | ||||||
5769 | MCSymbol *Sym = getContext().getOrCreateSymbol(Name); | ||||||
5770 | getStreamer().emitAddrsigSym(Sym); | ||||||
5771 | return false; | ||||||
5772 | } | ||||||
5773 | |||||||
5774 | bool AsmParser::parseDirectivePseudoProbe() { | ||||||
5775 | int64_t Guid; | ||||||
5776 | int64_t Index; | ||||||
5777 | int64_t Type; | ||||||
5778 | int64_t Attr; | ||||||
5779 | |||||||
5780 | if (getLexer().is(AsmToken::Integer)) { | ||||||
5781 | if (parseIntToken(Guid, "unexpected token in '.pseudoprobe' directive")) | ||||||
5782 | return true; | ||||||
5783 | } | ||||||
5784 | |||||||
5785 | if (getLexer().is(AsmToken::Integer)) { | ||||||
5786 | if (parseIntToken(Index, "unexpected token in '.pseudoprobe' directive")) | ||||||
5787 | return true; | ||||||
5788 | } | ||||||
5789 | |||||||
5790 | if (getLexer().is(AsmToken::Integer)) { | ||||||
5791 | if (parseIntToken(Type, "unexpected token in '.pseudoprobe' directive")) | ||||||
5792 | return true; | ||||||
5793 | } | ||||||
5794 | |||||||
5795 | if (getLexer().is(AsmToken::Integer)) { | ||||||
5796 | if (parseIntToken(Attr, "unexpected token in '.pseudoprobe' directive")) | ||||||
5797 | return true; | ||||||
5798 | } | ||||||
5799 | |||||||
5800 | // Parse inline stack like @ GUID:11:12 @ GUID:1:11 @ GUID:3:21 | ||||||
5801 | MCPseudoProbeInlineStack InlineStack; | ||||||
5802 | |||||||
5803 | while (getLexer().is(AsmToken::At)) { | ||||||
5804 | // eat @ | ||||||
5805 | Lex(); | ||||||
5806 | |||||||
5807 | int64_t CallerGuid = 0; | ||||||
5808 | if (getLexer().is(AsmToken::Integer)) { | ||||||
5809 | if (parseIntToken(CallerGuid, | ||||||
5810 | "unexpected token in '.pseudoprobe' directive")) | ||||||
5811 | return true; | ||||||
5812 | } | ||||||
5813 | |||||||
5814 | // eat colon | ||||||
5815 | if (getLexer().is(AsmToken::Colon)) | ||||||
5816 | Lex(); | ||||||
5817 | |||||||
5818 | int64_t CallerProbeId = 0; | ||||||
5819 | if (getLexer().is(AsmToken::Integer)) { | ||||||
5820 | if (parseIntToken(CallerProbeId, | ||||||
5821 | "unexpected token in '.pseudoprobe' directive")) | ||||||
5822 | return true; | ||||||
5823 | } | ||||||
5824 | |||||||
5825 | InlineSite Site(CallerGuid, CallerProbeId); | ||||||
5826 | InlineStack.push_back(Site); | ||||||
5827 | } | ||||||
5828 | |||||||
5829 | if (parseEOL()) | ||||||
5830 | return true; | ||||||
5831 | |||||||
5832 | getStreamer().emitPseudoProbe(Guid, Index, Type, Attr, InlineStack); | ||||||
| |||||||
5833 | return false; | ||||||
5834 | } | ||||||
5835 | |||||||
5836 | /// parseDirectiveLTODiscard | ||||||
5837 | /// ::= ".lto_discard" [ identifier ( , identifier )* ] | ||||||
5838 | /// The LTO library emits this directive to discard non-prevailing symbols. | ||||||
5839 | /// We ignore symbol assignments and attribute changes for the specified | ||||||
5840 | /// symbols. | ||||||
5841 | bool AsmParser::parseDirectiveLTODiscard() { | ||||||
5842 | auto ParseOp = [&]() -> bool { | ||||||
5843 | StringRef Name; | ||||||
5844 | SMLoc Loc = getTok().getLoc(); | ||||||
5845 | if (parseIdentifier(Name)) | ||||||
5846 | return Error(Loc, "expected identifier"); | ||||||
5847 | LTODiscardSymbols.insert(Name); | ||||||
5848 | return false; | ||||||
5849 | }; | ||||||
5850 | |||||||
5851 | LTODiscardSymbols.clear(); | ||||||
5852 | if (parseMany(ParseOp)) | ||||||
5853 | return addErrorSuffix(" in directive"); | ||||||
5854 | return false; | ||||||
5855 | } | ||||||
5856 | |||||||
5857 | // We are comparing pointers, but the pointers are relative to a single string. | ||||||
5858 | // Thus, this should always be deterministic. | ||||||
5859 | static int rewritesSort(const AsmRewrite *AsmRewriteA, | ||||||
5860 | const AsmRewrite *AsmRewriteB) { | ||||||
5861 | if (AsmRewriteA->Loc.getPointer() < AsmRewriteB->Loc.getPointer()) | ||||||
5862 | return -1; | ||||||
5863 | if (AsmRewriteB->Loc.getPointer() < AsmRewriteA->Loc.getPointer()) | ||||||
5864 | return 1; | ||||||
5865 | |||||||
5866 | // It's possible to have a SizeDirective, Imm/ImmPrefix and an Input/Output | ||||||
5867 | // rewrite to the same location. Make sure the SizeDirective rewrite is | ||||||
5868 | // performed first, then the Imm/ImmPrefix and finally the Input/Output. This | ||||||
5869 | // ensures the sort algorithm is stable. | ||||||
5870 | if (AsmRewritePrecedence[AsmRewriteA->Kind] > | ||||||
5871 | AsmRewritePrecedence[AsmRewriteB->Kind]) | ||||||
5872 | return -1; | ||||||
5873 | |||||||
5874 | if (AsmRewritePrecedence[AsmRewriteA->Kind] < | ||||||
5875 | AsmRewritePrecedence[AsmRewriteB->Kind]) | ||||||
5876 | return 1; | ||||||
5877 | llvm_unreachable("Unstable rewrite sort.")::llvm::llvm_unreachable_internal("Unstable rewrite sort.", "/build/llvm-toolchain-snapshot-13~++20210405022414+5f57793c4fe4/llvm/lib/MC/MCParser/AsmParser.cpp" , 5877); | ||||||
5878 | } | ||||||
5879 | |||||||
5880 | bool AsmParser::parseMSInlineAsm( | ||||||
5881 | void *AsmLoc, std::string &AsmString, unsigned &NumOutputs, | ||||||
5882 | unsigned &NumInputs, SmallVectorImpl<std::pair<void *, bool>> &OpDecls, | ||||||
5883 | SmallVectorImpl<std::string> &Constraints, | ||||||
5884 | SmallVectorImpl<std::string> &Clobbers, const MCInstrInfo *MII, | ||||||
5885 | const MCInstPrinter *IP, MCAsmParserSemaCallback &SI) { | ||||||
5886 | SmallVector<void *, 4> InputDecls; | ||||||
5887 | SmallVector<void *, 4> OutputDecls; | ||||||
5888 | SmallVector<bool, 4> InputDeclsAddressOf; | ||||||
5889 | SmallVector<bool, 4> OutputDeclsAddressOf; | ||||||
5890 | SmallVector<std::string, 4> InputConstraints; | ||||||
5891 | SmallVector<std::string, 4> OutputConstraints; | ||||||
5892 | SmallVector<unsigned, 4> ClobberRegs; | ||||||
5893 | |||||||
5894 | SmallVector<AsmRewrite, 4> AsmStrRewrites; | ||||||
5895 | |||||||
5896 | // Prime the lexer. | ||||||
5897 | Lex(); | ||||||
5898 | |||||||
5899 | // While we have input, parse each statement. | ||||||
5900 | unsigned InputIdx = 0; | ||||||
5901 | unsigned OutputIdx = 0; | ||||||
5902 | while (getLexer().isNot(AsmToken::Eof)) { | ||||||
5903 | // Parse curly braces marking block start/end | ||||||
5904 | if (parseCurlyBlockScope(AsmStrRewrites)) | ||||||
5905 | continue; | ||||||
5906 | |||||||
5907 | ParseStatementInfo Info(&AsmStrRewrites); | ||||||
5908 | bool StatementErr = parseStatement(Info, &SI); | ||||||
5909 | |||||||
5910 | if (StatementErr || Info.ParseError) { | ||||||
5911 | // Emit pending errors if any exist. | ||||||
5912 | printPendingErrors(); | ||||||
5913 | return true; | ||||||
5914 | } | ||||||
5915 | |||||||
5916 | // No pending error should exist here. | ||||||
5917 | 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~++20210405022414+5f57793c4fe4/llvm/lib/MC/MCParser/AsmParser.cpp" , 5917, __PRETTY_FUNCTION__)); | ||||||
5918 | |||||||
5919 | if (Info.Opcode == ~0U) | ||||||
5920 | continue; | ||||||
5921 | |||||||
5922 | const MCInstrDesc &Desc = MII->get(Info.Opcode); | ||||||
5923 | |||||||
5924 | // Build the list of clobbers, outputs and inputs. | ||||||
5925 | for (unsigned i = 1, e = Info.ParsedOperands.size(); i != e; ++i) { | ||||||
5926 | MCParsedAsmOperand &Operand = *Info.ParsedOperands[i]; | ||||||
5927 | |||||||
5928 | // Register operand. | ||||||
5929 | if (Operand.isReg() && !Operand.needAddressOf() && | ||||||
5930 | !getTargetParser().OmitRegisterFromClobberLists(Operand.getReg())) { | ||||||
5931 | unsigned NumDefs = Desc.getNumDefs(); | ||||||
5932 | // Clobber. | ||||||
5933 | if (NumDefs && Operand.getMCOperandNum() < NumDefs) | ||||||
5934 | ClobberRegs.push_back(Operand.getReg()); | ||||||
5935 | continue; | ||||||
5936 | } | ||||||
5937 | |||||||
5938 | // Expr/Input or Output. | ||||||
5939 | StringRef SymName = Operand.getSymName(); | ||||||
5940 | if (SymName.empty()) | ||||||
5941 | continue; | ||||||
5942 | |||||||
5943 | void *OpDecl = Operand.getOpDecl(); | ||||||
5944 | if (!OpDecl) | ||||||
5945 | continue; | ||||||
5946 | |||||||
5947 | StringRef Constraint = Operand.getConstraint(); | ||||||
5948 | if (Operand.isImm()) { | ||||||
5949 | // Offset as immediate | ||||||
5950 | if (Operand.isOffsetOfLocal()) | ||||||
5951 | Constraint = "r"; | ||||||
5952 | else | ||||||
5953 | Constraint = "i"; | ||||||
5954 | } | ||||||
5955 | |||||||
5956 | bool isOutput = (i == 1) && Desc.mayStore(); | ||||||
5957 | SMLoc Start = SMLoc::getFromPointer(SymName.data()); | ||||||
5958 | if (isOutput) { | ||||||
5959 | ++InputIdx; | ||||||
5960 | OutputDecls.push_back(OpDecl); | ||||||
5961 | OutputDeclsAddressOf.push_back(Operand.needAddressOf()); | ||||||
5962 | OutputConstraints.push_back(("=" + Constraint).str()); | ||||||
5963 | AsmStrRewrites.emplace_back(AOK_Output, Start, SymName.size()); | ||||||
5964 | } else { | ||||||
5965 | InputDecls.push_back(OpDecl); | ||||||
5966 | InputDeclsAddressOf.push_back(Operand.needAddressOf()); | ||||||
5967 | InputConstraints.push_back(Constraint.str()); | ||||||
5968 | if (Desc.OpInfo[i - 1].isBranchTarget()) | ||||||
5969 | AsmStrRewrites.emplace_back(AOK_CallInput, Start, SymName.size()); | ||||||
5970 | else | ||||||
5971 | AsmStrRewrites.emplace_back(AOK_Input, Start, SymName.size()); | ||||||
5972 | } | ||||||
5973 | } | ||||||
5974 | |||||||
5975 | // Consider implicit defs to be clobbers. Think of cpuid and push. | ||||||
5976 | ArrayRef<MCPhysReg> ImpDefs(Desc.getImplicitDefs(), | ||||||
5977 | Desc.getNumImplicitDefs()); | ||||||
5978 | llvm::append_range(ClobberRegs, ImpDefs); | ||||||
5979 | } | ||||||
5980 | |||||||
5981 | // Set the number of Outputs and Inputs. | ||||||
5982 | NumOutputs = OutputDecls.size(); | ||||||
5983 | NumInputs = InputDecls.size(); | ||||||
5984 | |||||||
5985 | // Set the unique clobbers. | ||||||
5986 | array_pod_sort(ClobberRegs.begin(), ClobberRegs.end()); | ||||||
5987 | ClobberRegs.erase(std::unique(ClobberRegs.begin(), ClobberRegs.end()), | ||||||
5988 | ClobberRegs.end()); | ||||||
5989 | Clobbers.assign(ClobberRegs.size(), std::string()); | ||||||
5990 | for (unsigned I = 0, E = ClobberRegs.size(); I != E; ++I) { | ||||||
5991 | raw_string_ostream OS(Clobbers[I]); | ||||||
5992 | IP->printRegName(OS, ClobberRegs[I]); | ||||||
5993 | } | ||||||
5994 | |||||||
5995 | // Merge the various outputs and inputs. Output are expected first. | ||||||
5996 | if (NumOutputs || NumInputs) { | ||||||
5997 | unsigned NumExprs = NumOutputs + NumInputs; | ||||||
5998 | OpDecls.resize(NumExprs); | ||||||
5999 | Constraints.resize(NumExprs); | ||||||
6000 | for (unsigned i = 0; i < NumOutputs; ++i) { | ||||||
6001 | OpDecls[i] = std::make_pair(OutputDecls[i], OutputDeclsAddressOf[i]); | ||||||
6002 | Constraints[i] = OutputConstraints[i]; | ||||||
6003 | } | ||||||
6004 | for (unsigned i = 0, j = NumOutputs; i < NumInputs; ++i, ++j) { | ||||||
6005 | OpDecls[j] = std::make_pair(InputDecls[i], InputDeclsAddressOf[i]); | ||||||
6006 | Constraints[j] = InputConstraints[i]; | ||||||
6007 | } | ||||||
6008 | } | ||||||
6009 | |||||||
6010 | // Build the IR assembly string. | ||||||
6011 | std::string AsmStringIR; | ||||||
6012 | raw_string_ostream OS(AsmStringIR); | ||||||
6013 | StringRef ASMString = | ||||||
6014 | SrcMgr.getMemoryBuffer(SrcMgr.getMainFileID())->getBuffer(); | ||||||
6015 | const char *AsmStart = ASMString.begin(); | ||||||
6016 | const char *AsmEnd = ASMString.end(); | ||||||
6017 | array_pod_sort(AsmStrRewrites.begin(), AsmStrRewrites.end(), rewritesSort); | ||||||
6018 | for (auto it = AsmStrRewrites.begin(); it != AsmStrRewrites.end(); ++it) { | ||||||
6019 | const AsmRewrite &AR = *it; | ||||||
6020 | // Check if this has already been covered by another rewrite... | ||||||
6021 | if (AR.Done) | ||||||
6022 | continue; | ||||||
6023 | AsmRewriteKind Kind = AR.Kind; | ||||||
6024 | |||||||
6025 | const char *Loc = AR.Loc.getPointer(); | ||||||
6026 | 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~++20210405022414+5f57793c4fe4/llvm/lib/MC/MCParser/AsmParser.cpp" , 6026, __PRETTY_FUNCTION__)); | ||||||
6027 | |||||||
6028 | // Emit everything up to the immediate/expression. | ||||||
6029 | if (unsigned Len = Loc - AsmStart) | ||||||
6030 | OS << StringRef(AsmStart, Len); | ||||||
6031 | |||||||
6032 | // Skip the original expression. | ||||||
6033 | if (Kind == AOK_Skip) { | ||||||
6034 | AsmStart = Loc + AR.Len; | ||||||
6035 | continue; | ||||||
6036 | } | ||||||
6037 | |||||||
6038 | unsigned AdditionalSkip = 0; | ||||||
6039 | // Rewrite expressions in $N notation. | ||||||
6040 | switch (Kind) { | ||||||
6041 | default: | ||||||
6042 | break; | ||||||
6043 | case AOK_IntelExpr: | ||||||
6044 | 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~++20210405022414+5f57793c4fe4/llvm/lib/MC/MCParser/AsmParser.cpp" , 6044, __PRETTY_FUNCTION__)); | ||||||
6045 | if (AR.IntelExp.NeedBracs) | ||||||
6046 | OS << "["; | ||||||
6047 | if (AR.IntelExp.hasBaseReg()) | ||||||
6048 | OS << AR.IntelExp.BaseReg; | ||||||
6049 | if (AR.IntelExp.hasIndexReg()) | ||||||
6050 | OS << (AR.IntelExp.hasBaseReg() ? " + " : "") | ||||||
6051 | << AR.IntelExp.IndexReg; | ||||||
6052 | if (AR.IntelExp.Scale > 1) | ||||||
6053 | OS << " * $$" << AR.IntelExp.Scale; | ||||||
6054 | if (AR.IntelExp.hasOffset()) { | ||||||
6055 | if (AR.IntelExp.hasRegs()) | ||||||
6056 | OS << " + "; | ||||||
6057 | // Fuse this rewrite with a rewrite of the offset name, if present. | ||||||
6058 | StringRef OffsetName = AR.IntelExp.OffsetName; | ||||||
6059 | SMLoc OffsetLoc = SMLoc::getFromPointer(AR.IntelExp.OffsetName.data()); | ||||||
6060 | size_t OffsetLen = OffsetName.size(); | ||||||
6061 | auto rewrite_it = std::find_if( | ||||||
6062 | it, AsmStrRewrites.end(), [&](const AsmRewrite &FusingAR) { | ||||||
6063 | return FusingAR.Loc == OffsetLoc && FusingAR.Len == OffsetLen && | ||||||
6064 | (FusingAR.Kind == AOK_Input || | ||||||
6065 | FusingAR.Kind == AOK_CallInput); | ||||||
6066 | }); | ||||||
6067 | if (rewrite_it == AsmStrRewrites.end()) { | ||||||
6068 | OS << "offset " << OffsetName; | ||||||
6069 | } else if (rewrite_it->Kind == AOK_CallInput) { | ||||||
6070 | OS << "${" << InputIdx++ << ":P}"; | ||||||
6071 | rewrite_it->Done = true; | ||||||
6072 | } else { | ||||||
6073 | OS << '$' << InputIdx++; | ||||||
6074 | rewrite_it->Done = true; | ||||||
6075 | } | ||||||
6076 | } | ||||||
6077 | if (AR.IntelExp.Imm || AR.IntelExp.emitImm()) | ||||||
6078 | OS << (AR.IntelExp.emitImm() ? "$$" : " + $$") << AR.IntelExp.Imm; | ||||||
6079 | if (AR.IntelExp.NeedBracs) | ||||||
6080 | OS << "]"; | ||||||
6081 | break; | ||||||
6082 | case AOK_Label: | ||||||
6083 | OS << Ctx.getAsmInfo()->getPrivateLabelPrefix() << AR.Label; | ||||||
6084 | break; | ||||||
6085 | case AOK_Input: | ||||||
6086 | OS << '$' << InputIdx++; | ||||||
6087 | break; | ||||||
6088 | case AOK_CallInput: | ||||||
6089 | OS << "${" << InputIdx++ << ":P}"; | ||||||
6090 | break; | ||||||
6091 | case AOK_Output: | ||||||
6092 | OS << '$' << OutputIdx++; | ||||||
6093 | break; | ||||||
6094 | case AOK_SizeDirective: | ||||||
6095 | switch (AR.Val) { | ||||||
6096 | default: break; | ||||||
6097 | case 8: OS << "byte ptr "; break; | ||||||
6098 | case 16: OS << "word ptr "; break; | ||||||
6099 | case 32: OS << "dword ptr "; break; | ||||||
6100 | case 64: OS << "qword ptr "; break; | ||||||
6101 | case 80: OS << "xword ptr "; break; | ||||||
6102 | case 128: OS << "xmmword ptr "; break; | ||||||
6103 | case 256: OS << "ymmword ptr "; break; | ||||||
6104 | } | ||||||
6105 | break; | ||||||
6106 | case AOK_Emit: | ||||||
6107 | OS << ".byte"; | ||||||
6108 | break; | ||||||
6109 | case AOK_Align: { | ||||||
6110 | // MS alignment directives are measured in bytes. If the native assembler | ||||||
6111 | // measures alignment in bytes, we can pass it straight through. | ||||||
6112 | OS << ".align"; | ||||||
6113 | if (getContext().getAsmInfo()->getAlignmentIsInBytes()) | ||||||
6114 | break; | ||||||
6115 | |||||||
6116 | // Alignment is in log2 form, so print that instead and skip the original | ||||||
6117 | // immediate. | ||||||
6118 | unsigned Val = AR.Val; | ||||||
6119 | OS << ' ' << Val; | ||||||
6120 | 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~++20210405022414+5f57793c4fe4/llvm/lib/MC/MCParser/AsmParser.cpp" , 6120, __PRETTY_FUNCTION__)); | ||||||