File: | lib/MC/MCParser/AsmParser.cpp |
Warning: | line 3066, column 7 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 the parser for assembly files. | |||
10 | // | |||
11 | //===----------------------------------------------------------------------===// | |||
12 | ||||
13 | #include "llvm/ADT/APFloat.h" | |||
14 | #include "llvm/ADT/APInt.h" | |||
15 | #include "llvm/ADT/ArrayRef.h" | |||
16 | #include "llvm/ADT/None.h" | |||
17 | #include "llvm/ADT/STLExtras.h" | |||
18 | #include "llvm/ADT/SmallString.h" | |||
19 | #include "llvm/ADT/SmallVector.h" | |||
20 | #include "llvm/ADT/StringExtras.h" | |||
21 | #include "llvm/ADT/StringMap.h" | |||
22 | #include "llvm/ADT/StringRef.h" | |||
23 | #include "llvm/ADT/Twine.h" | |||
24 | #include "llvm/BinaryFormat/Dwarf.h" | |||
25 | #include "llvm/MC/MCAsmInfo.h" | |||
26 | #include "llvm/MC/MCCodeView.h" | |||
27 | #include "llvm/MC/MCContext.h" | |||
28 | #include "llvm/MC/MCDirectives.h" | |||
29 | #include "llvm/MC/MCDwarf.h" | |||
30 | #include "llvm/MC/MCExpr.h" | |||
31 | #include "llvm/MC/MCInstPrinter.h" | |||
32 | #include "llvm/MC/MCInstrDesc.h" | |||
33 | #include "llvm/MC/MCInstrInfo.h" | |||
34 | #include "llvm/MC/MCObjectFileInfo.h" | |||
35 | #include "llvm/MC/MCParser/AsmCond.h" | |||
36 | #include "llvm/MC/MCParser/AsmLexer.h" | |||
37 | #include "llvm/MC/MCParser/MCAsmLexer.h" | |||
38 | #include "llvm/MC/MCParser/MCAsmParser.h" | |||
39 | #include "llvm/MC/MCParser/MCAsmParserExtension.h" | |||
40 | #include "llvm/MC/MCParser/MCAsmParserUtils.h" | |||
41 | #include "llvm/MC/MCParser/MCParsedAsmOperand.h" | |||
42 | #include "llvm/MC/MCParser/MCTargetAsmParser.h" | |||
43 | #include "llvm/MC/MCRegisterInfo.h" | |||
44 | #include "llvm/MC/MCSection.h" | |||
45 | #include "llvm/MC/MCStreamer.h" | |||
46 | #include "llvm/MC/MCSymbol.h" | |||
47 | #include "llvm/MC/MCTargetOptions.h" | |||
48 | #include "llvm/MC/MCValue.h" | |||
49 | #include "llvm/Support/Casting.h" | |||
50 | #include "llvm/Support/CommandLine.h" | |||
51 | #include "llvm/Support/ErrorHandling.h" | |||
52 | #include "llvm/Support/MD5.h" | |||
53 | #include "llvm/Support/MathExtras.h" | |||
54 | #include "llvm/Support/MemoryBuffer.h" | |||
55 | #include "llvm/Support/SMLoc.h" | |||
56 | #include "llvm/Support/SourceMgr.h" | |||
57 | #include "llvm/Support/raw_ostream.h" | |||
58 | #include <algorithm> | |||
59 | #include <cassert> | |||
60 | #include <cctype> | |||
61 | #include <climits> | |||
62 | #include <cstddef> | |||
63 | #include <cstdint> | |||
64 | #include <deque> | |||
65 | #include <memory> | |||
66 | #include <sstream> | |||
67 | #include <string> | |||
68 | #include <tuple> | |||
69 | #include <utility> | |||
70 | #include <vector> | |||
71 | ||||
72 | using namespace llvm; | |||
73 | ||||
74 | MCAsmParserSemaCallback::~MCAsmParserSemaCallback() = default; | |||
75 | ||||
76 | static cl::opt<unsigned> AsmMacroMaxNestingDepth( | |||
77 | "asm-macro-max-nesting-depth", cl::init(20), cl::Hidden, | |||
78 | cl::desc("The maximum nesting depth allowed for assembly macros.")); | |||
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 | int 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 | public: | |||
102 | MacroInstantiation(SMLoc IL, int EB, SMLoc EL, size_t CondStackDepth); | |||
103 | }; | |||
104 | ||||
105 | struct ParseStatementInfo { | |||
106 | /// The parsed operands from the last parsed statement. | |||
107 | SmallVector<std::unique_ptr<MCParsedAsmOperand>, 8> ParsedOperands; | |||
108 | ||||
109 | /// The opcode from the last parsed instruction. | |||
110 | unsigned Opcode = ~0U; | |||
111 | ||||
112 | /// Was there an error parsing the inline assembly? | |||
113 | bool ParseError = false; | |||
114 | ||||
115 | SmallVectorImpl<AsmRewrite> *AsmRewrites = nullptr; | |||
116 | ||||
117 | ParseStatementInfo() = delete; | |||
118 | ParseStatementInfo(SmallVectorImpl<AsmRewrite> *rewrites) | |||
119 | : AsmRewrites(rewrites) {} | |||
120 | }; | |||
121 | ||||
122 | /// The concrete assembly parser instance. | |||
123 | class AsmParser : public MCAsmParser { | |||
124 | private: | |||
125 | AsmLexer Lexer; | |||
126 | MCContext &Ctx; | |||
127 | MCStreamer &Out; | |||
128 | const MCAsmInfo &MAI; | |||
129 | SourceMgr &SrcMgr; | |||
130 | SourceMgr::DiagHandlerTy SavedDiagHandler; | |||
131 | void *SavedDiagContext; | |||
132 | std::unique_ptr<MCAsmParserExtension> PlatformParser; | |||
133 | ||||
134 | /// This is the current buffer index we're lexing from as managed by the | |||
135 | /// SourceMgr object. | |||
136 | unsigned CurBuffer; | |||
137 | ||||
138 | AsmCond TheCondState; | |||
139 | std::vector<AsmCond> TheCondStack; | |||
140 | ||||
141 | /// maps directive names to handler methods in parser | |||
142 | /// extensions. Extensions register themselves in this map by calling | |||
143 | /// addDirectiveHandler. | |||
144 | StringMap<ExtensionDirectiveHandler> ExtensionDirectiveMap; | |||
145 | ||||
146 | /// Stack of active macro instantiations. | |||
147 | std::vector<MacroInstantiation*> ActiveMacros; | |||
148 | ||||
149 | /// List of bodies of anonymous macros. | |||
150 | std::deque<MCAsmMacro> MacroLikeBodies; | |||
151 | ||||
152 | /// Boolean tracking whether macro substitution is enabled. | |||
153 | unsigned MacrosEnabledFlag : 1; | |||
154 | ||||
155 | /// Keeps track of how many .macro's have been instantiated. | |||
156 | unsigned NumOfMacroInstantiations; | |||
157 | ||||
158 | /// The values from the last parsed cpp hash file line comment if any. | |||
159 | struct CppHashInfoTy { | |||
160 | StringRef Filename; | |||
161 | int64_t LineNumber; | |||
162 | SMLoc Loc; | |||
163 | unsigned Buf; | |||
164 | CppHashInfoTy() : Filename(), LineNumber(0), Loc(), Buf(0) {} | |||
165 | }; | |||
166 | CppHashInfoTy CppHashInfo; | |||
167 | ||||
168 | /// The filename from the first cpp hash file line comment, if any. | |||
169 | StringRef FirstCppHashFilename; | |||
170 | ||||
171 | /// List of forward directional labels for diagnosis at the end. | |||
172 | SmallVector<std::tuple<SMLoc, CppHashInfoTy, MCSymbol *>, 4> DirLabels; | |||
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 ParsingInlineAsm = 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] = DirectiveKindMap[Alias]; | |||
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 setParsingInlineAsm(bool V) override { | |||
234 | ParsingInlineAsm = 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 isParsingInlineAsm() override { return ParsingInlineAsm; } | |||
240 | ||||
241 | bool parseMSInlineAsm(void *AsmLoc, std::string &AsmString, | |||
242 | unsigned &NumOutputs, unsigned &NumInputs, | |||
243 | SmallVectorImpl<std::pair<void *,bool>> &OpDecls, | |||
244 | SmallVectorImpl<std::string> &Constraints, | |||
245 | SmallVectorImpl<std::string> &Clobbers, | |||
246 | const MCInstrInfo *MII, const MCInstPrinter *IP, | |||
247 | MCAsmParserSemaCallback &SI) override; | |||
248 | ||||
249 | bool parseExpression(const MCExpr *&Res); | |||
250 | bool parseExpression(const MCExpr *&Res, SMLoc &EndLoc) override; | |||
251 | bool parsePrimaryExpr(const MCExpr *&Res, SMLoc &EndLoc) override; | |||
252 | bool parseParenExpression(const MCExpr *&Res, SMLoc &EndLoc) override; | |||
253 | bool parseParenExprOfDepth(unsigned ParenDepth, const MCExpr *&Res, | |||
254 | SMLoc &EndLoc) override; | |||
255 | bool parseAbsoluteExpression(int64_t &Res) override; | |||
256 | ||||
257 | /// Parse a floating point expression using the float \p Semantics | |||
258 | /// and set \p Res to the value. | |||
259 | bool parseRealValue(const fltSemantics &Semantics, APInt &Res); | |||
260 | ||||
261 | /// Parse an identifier or string (as a quoted identifier) | |||
262 | /// and set \p Res to the identifier contents. | |||
263 | bool parseIdentifier(StringRef &Res) override; | |||
264 | void eatToEndOfStatement() override; | |||
265 | ||||
266 | bool checkForValidSection() override; | |||
267 | ||||
268 | /// } | |||
269 | ||||
270 | private: | |||
271 | bool parseStatement(ParseStatementInfo &Info, | |||
272 | MCAsmParserSemaCallback *SI); | |||
273 | bool parseCurlyBlockScope(SmallVectorImpl<AsmRewrite>& AsmStrRewrites); | |||
274 | bool parseCppHashLineFilenameComment(SMLoc L); | |||
275 | ||||
276 | void checkForBadMacro(SMLoc DirectiveLoc, StringRef Name, StringRef Body, | |||
277 | ArrayRef<MCAsmMacroParameter> Parameters); | |||
278 | bool expandMacro(raw_svector_ostream &OS, StringRef Body, | |||
279 | ArrayRef<MCAsmMacroParameter> Parameters, | |||
280 | ArrayRef<MCAsmMacroArgument> A, bool EnableAtPseudoVariable, | |||
281 | SMLoc L); | |||
282 | ||||
283 | /// Are macros enabled in the parser? | |||
284 | bool areMacrosEnabled() {return MacrosEnabledFlag;} | |||
285 | ||||
286 | /// Control a flag in the parser that enables or disables macros. | |||
287 | void setMacrosEnabled(bool Flag) {MacrosEnabledFlag = Flag;} | |||
288 | ||||
289 | /// Are we inside a macro instantiation? | |||
290 | bool isInsideMacroInstantiation() {return !ActiveMacros.empty();} | |||
291 | ||||
292 | /// Handle entry to macro instantiation. | |||
293 | /// | |||
294 | /// \param M The macro. | |||
295 | /// \param NameLoc Instantiation location. | |||
296 | bool handleMacroEntry(const MCAsmMacro *M, SMLoc NameLoc); | |||
297 | ||||
298 | /// Handle exit from macro instantiation. | |||
299 | void handleMacroExit(); | |||
300 | ||||
301 | /// Extract AsmTokens for a macro argument. | |||
302 | bool parseMacroArgument(MCAsmMacroArgument &MA, bool Vararg); | |||
303 | ||||
304 | /// Parse all macro arguments for a given macro. | |||
305 | bool parseMacroArguments(const MCAsmMacro *M, MCAsmMacroArguments &A); | |||
306 | ||||
307 | void printMacroInstantiations(); | |||
308 | void printMessage(SMLoc Loc, SourceMgr::DiagKind Kind, const Twine &Msg, | |||
309 | SMRange Range = None) const { | |||
310 | ArrayRef<SMRange> Ranges(Range); | |||
311 | SrcMgr.PrintMessage(Loc, Kind, Msg, Ranges); | |||
312 | } | |||
313 | static void DiagHandler(const SMDiagnostic &Diag, void *Context); | |||
314 | ||||
315 | /// Should we emit DWARF describing this assembler source? (Returns false if | |||
316 | /// the source has .file directives, which means we don't want to generate | |||
317 | /// info describing the assembler source itself.) | |||
318 | bool enabledGenDwarfForAssembly(); | |||
319 | ||||
320 | /// Enter the specified file. This returns true on failure. | |||
321 | bool enterIncludeFile(const std::string &Filename); | |||
322 | ||||
323 | /// Process the specified file for the .incbin directive. | |||
324 | /// This returns true on failure. | |||
325 | bool processIncbinFile(const std::string &Filename, int64_t Skip = 0, | |||
326 | const MCExpr *Count = nullptr, SMLoc Loc = SMLoc()); | |||
327 | ||||
328 | /// Reset the current lexer position to that given by \p Loc. The | |||
329 | /// current token is not set; clients should ensure Lex() is called | |||
330 | /// subsequently. | |||
331 | /// | |||
332 | /// \param InBuffer If not 0, should be the known buffer id that contains the | |||
333 | /// location. | |||
334 | void jumpToLoc(SMLoc Loc, unsigned InBuffer = 0); | |||
335 | ||||
336 | /// Parse up to the end of statement and a return the contents from the | |||
337 | /// current token until the end of the statement; the current token on exit | |||
338 | /// will be either the EndOfStatement or EOF. | |||
339 | StringRef parseStringToEndOfStatement() override; | |||
340 | ||||
341 | /// Parse until the end of a statement or a comma is encountered, | |||
342 | /// return the contents from the current token up to the end or comma. | |||
343 | StringRef parseStringToComma(); | |||
344 | ||||
345 | bool parseAssignment(StringRef Name, bool allow_redef, | |||
346 | bool NoDeadStrip = false); | |||
347 | ||||
348 | unsigned getBinOpPrecedence(AsmToken::TokenKind K, | |||
349 | MCBinaryExpr::Opcode &Kind); | |||
350 | ||||
351 | bool parseBinOpRHS(unsigned Precedence, const MCExpr *&Res, SMLoc &EndLoc); | |||
352 | bool parseParenExpr(const MCExpr *&Res, SMLoc &EndLoc); | |||
353 | bool parseBracketExpr(const MCExpr *&Res, SMLoc &EndLoc); | |||
354 | ||||
355 | bool parseRegisterOrRegisterNumber(int64_t &Register, SMLoc DirectiveLoc); | |||
356 | ||||
357 | bool parseCVFunctionId(int64_t &FunctionId, StringRef DirectiveName); | |||
358 | bool parseCVFileId(int64_t &FileId, StringRef DirectiveName); | |||
359 | ||||
360 | // Generic (target and platform independent) directive parsing. | |||
361 | enum DirectiveKind { | |||
362 | DK_NO_DIRECTIVE, // Placeholder | |||
363 | DK_SET, | |||
364 | DK_EQU, | |||
365 | DK_EQUIV, | |||
366 | DK_ASCII, | |||
367 | DK_ASCIZ, | |||
368 | DK_STRING, | |||
369 | DK_BYTE, | |||
370 | DK_SHORT, | |||
371 | DK_RELOC, | |||
372 | DK_VALUE, | |||
373 | DK_2BYTE, | |||
374 | DK_LONG, | |||
375 | DK_INT, | |||
376 | DK_4BYTE, | |||
377 | DK_QUAD, | |||
378 | DK_8BYTE, | |||
379 | DK_OCTA, | |||
380 | DK_DC, | |||
381 | DK_DC_A, | |||
382 | DK_DC_B, | |||
383 | DK_DC_D, | |||
384 | DK_DC_L, | |||
385 | DK_DC_S, | |||
386 | DK_DC_W, | |||
387 | DK_DC_X, | |||
388 | DK_DCB, | |||
389 | DK_DCB_B, | |||
390 | DK_DCB_D, | |||
391 | DK_DCB_L, | |||
392 | DK_DCB_S, | |||
393 | DK_DCB_W, | |||
394 | DK_DCB_X, | |||
395 | DK_DS, | |||
396 | DK_DS_B, | |||
397 | DK_DS_D, | |||
398 | DK_DS_L, | |||
399 | DK_DS_P, | |||
400 | DK_DS_S, | |||
401 | DK_DS_W, | |||
402 | DK_DS_X, | |||
403 | DK_SINGLE, | |||
404 | DK_FLOAT, | |||
405 | DK_DOUBLE, | |||
406 | DK_ALIGN, | |||
407 | DK_ALIGN32, | |||
408 | DK_BALIGN, | |||
409 | DK_BALIGNW, | |||
410 | DK_BALIGNL, | |||
411 | DK_P2ALIGN, | |||
412 | DK_P2ALIGNW, | |||
413 | DK_P2ALIGNL, | |||
414 | DK_ORG, | |||
415 | DK_FILL, | |||
416 | DK_ENDR, | |||
417 | DK_BUNDLE_ALIGN_MODE, | |||
418 | DK_BUNDLE_LOCK, | |||
419 | DK_BUNDLE_UNLOCK, | |||
420 | DK_ZERO, | |||
421 | DK_EXTERN, | |||
422 | DK_GLOBL, | |||
423 | DK_GLOBAL, | |||
424 | DK_LAZY_REFERENCE, | |||
425 | DK_NO_DEAD_STRIP, | |||
426 | DK_SYMBOL_RESOLVER, | |||
427 | DK_PRIVATE_EXTERN, | |||
428 | DK_REFERENCE, | |||
429 | DK_WEAK_DEFINITION, | |||
430 | DK_WEAK_REFERENCE, | |||
431 | DK_WEAK_DEF_CAN_BE_HIDDEN, | |||
432 | DK_COLD, | |||
433 | DK_COMM, | |||
434 | DK_COMMON, | |||
435 | DK_LCOMM, | |||
436 | DK_ABORT, | |||
437 | DK_INCLUDE, | |||
438 | DK_INCBIN, | |||
439 | DK_CODE16, | |||
440 | DK_CODE16GCC, | |||
441 | DK_REPT, | |||
442 | DK_IRP, | |||
443 | DK_IRPC, | |||
444 | DK_IF, | |||
445 | DK_IFEQ, | |||
446 | DK_IFGE, | |||
447 | DK_IFGT, | |||
448 | DK_IFLE, | |||
449 | DK_IFLT, | |||
450 | DK_IFNE, | |||
451 | DK_IFB, | |||
452 | DK_IFNB, | |||
453 | DK_IFC, | |||
454 | DK_IFEQS, | |||
455 | DK_IFNC, | |||
456 | DK_IFNES, | |||
457 | DK_IFDEF, | |||
458 | DK_IFNDEF, | |||
459 | DK_IFNOTDEF, | |||
460 | DK_ELSEIF, | |||
461 | DK_ELSE, | |||
462 | DK_ENDIF, | |||
463 | DK_SPACE, | |||
464 | DK_SKIP, | |||
465 | DK_FILE, | |||
466 | DK_LINE, | |||
467 | DK_LOC, | |||
468 | DK_STABS, | |||
469 | DK_CV_FILE, | |||
470 | DK_CV_FUNC_ID, | |||
471 | DK_CV_INLINE_SITE_ID, | |||
472 | DK_CV_LOC, | |||
473 | DK_CV_LINETABLE, | |||
474 | DK_CV_INLINE_LINETABLE, | |||
475 | DK_CV_DEF_RANGE, | |||
476 | DK_CV_STRINGTABLE, | |||
477 | DK_CV_STRING, | |||
478 | DK_CV_FILECHECKSUMS, | |||
479 | DK_CV_FILECHECKSUM_OFFSET, | |||
480 | DK_CV_FPO_DATA, | |||
481 | DK_CFI_SECTIONS, | |||
482 | DK_CFI_STARTPROC, | |||
483 | DK_CFI_ENDPROC, | |||
484 | DK_CFI_DEF_CFA, | |||
485 | DK_CFI_DEF_CFA_OFFSET, | |||
486 | DK_CFI_ADJUST_CFA_OFFSET, | |||
487 | DK_CFI_DEF_CFA_REGISTER, | |||
488 | DK_CFI_OFFSET, | |||
489 | DK_CFI_REL_OFFSET, | |||
490 | DK_CFI_PERSONALITY, | |||
491 | DK_CFI_LSDA, | |||
492 | DK_CFI_REMEMBER_STATE, | |||
493 | DK_CFI_RESTORE_STATE, | |||
494 | DK_CFI_SAME_VALUE, | |||
495 | DK_CFI_RESTORE, | |||
496 | DK_CFI_ESCAPE, | |||
497 | DK_CFI_RETURN_COLUMN, | |||
498 | DK_CFI_SIGNAL_FRAME, | |||
499 | DK_CFI_UNDEFINED, | |||
500 | DK_CFI_REGISTER, | |||
501 | DK_CFI_WINDOW_SAVE, | |||
502 | DK_CFI_B_KEY_FRAME, | |||
503 | DK_MACROS_ON, | |||
504 | DK_MACROS_OFF, | |||
505 | DK_ALTMACRO, | |||
506 | DK_NOALTMACRO, | |||
507 | DK_MACRO, | |||
508 | DK_EXITM, | |||
509 | DK_ENDM, | |||
510 | DK_ENDMACRO, | |||
511 | DK_PURGEM, | |||
512 | DK_SLEB128, | |||
513 | DK_ULEB128, | |||
514 | DK_ERR, | |||
515 | DK_ERROR, | |||
516 | DK_WARNING, | |||
517 | DK_PRINT, | |||
518 | DK_ADDRSIG, | |||
519 | DK_ADDRSIG_SYM, | |||
520 | DK_END | |||
521 | }; | |||
522 | ||||
523 | /// Maps directive name --> DirectiveKind enum, for | |||
524 | /// directives parsed by this class. | |||
525 | StringMap<DirectiveKind> DirectiveKindMap; | |||
526 | ||||
527 | // ".ascii", ".asciz", ".string" | |||
528 | bool parseDirectiveAscii(StringRef IDVal, bool ZeroTerminated); | |||
529 | bool parseDirectiveReloc(SMLoc DirectiveLoc); // ".reloc" | |||
530 | bool parseDirectiveValue(StringRef IDVal, | |||
531 | unsigned Size); // ".byte", ".long", ... | |||
532 | bool parseDirectiveOctaValue(StringRef IDVal); // ".octa", ... | |||
533 | bool parseDirectiveRealValue(StringRef IDVal, | |||
534 | const fltSemantics &); // ".single", ... | |||
535 | bool parseDirectiveFill(); // ".fill" | |||
536 | bool parseDirectiveZero(); // ".zero" | |||
537 | // ".set", ".equ", ".equiv" | |||
538 | bool parseDirectiveSet(StringRef IDVal, bool allow_redef); | |||
539 | bool parseDirectiveOrg(); // ".org" | |||
540 | // ".align{,32}", ".p2align{,w,l}" | |||
541 | bool parseDirectiveAlign(bool IsPow2, unsigned ValueSize); | |||
542 | ||||
543 | // ".file", ".line", ".loc", ".stabs" | |||
544 | bool parseDirectiveFile(SMLoc DirectiveLoc); | |||
545 | bool parseDirectiveLine(); | |||
546 | bool parseDirectiveLoc(); | |||
547 | bool parseDirectiveStabs(); | |||
548 | ||||
549 | // ".cv_file", ".cv_func_id", ".cv_inline_site_id", ".cv_loc", ".cv_linetable", | |||
550 | // ".cv_inline_linetable", ".cv_def_range", ".cv_string" | |||
551 | bool parseDirectiveCVFile(); | |||
552 | bool parseDirectiveCVFuncId(); | |||
553 | bool parseDirectiveCVInlineSiteId(); | |||
554 | bool parseDirectiveCVLoc(); | |||
555 | bool parseDirectiveCVLinetable(); | |||
556 | bool parseDirectiveCVInlineLinetable(); | |||
557 | bool parseDirectiveCVDefRange(); | |||
558 | bool parseDirectiveCVString(); | |||
559 | bool parseDirectiveCVStringTable(); | |||
560 | bool parseDirectiveCVFileChecksums(); | |||
561 | bool parseDirectiveCVFileChecksumOffset(); | |||
562 | bool parseDirectiveCVFPOData(); | |||
563 | ||||
564 | // .cfi directives | |||
565 | bool parseDirectiveCFIRegister(SMLoc DirectiveLoc); | |||
566 | bool parseDirectiveCFIWindowSave(); | |||
567 | bool parseDirectiveCFISections(); | |||
568 | bool parseDirectiveCFIStartProc(); | |||
569 | bool parseDirectiveCFIEndProc(); | |||
570 | bool parseDirectiveCFIDefCfaOffset(); | |||
571 | bool parseDirectiveCFIDefCfa(SMLoc DirectiveLoc); | |||
572 | bool parseDirectiveCFIAdjustCfaOffset(); | |||
573 | bool parseDirectiveCFIDefCfaRegister(SMLoc DirectiveLoc); | |||
574 | bool parseDirectiveCFIOffset(SMLoc DirectiveLoc); | |||
575 | bool parseDirectiveCFIRelOffset(SMLoc DirectiveLoc); | |||
576 | bool parseDirectiveCFIPersonalityOrLsda(bool IsPersonality); | |||
577 | bool parseDirectiveCFIRememberState(); | |||
578 | bool parseDirectiveCFIRestoreState(); | |||
579 | bool parseDirectiveCFISameValue(SMLoc DirectiveLoc); | |||
580 | bool parseDirectiveCFIRestore(SMLoc DirectiveLoc); | |||
581 | bool parseDirectiveCFIEscape(); | |||
582 | bool parseDirectiveCFIReturnColumn(SMLoc DirectiveLoc); | |||
583 | bool parseDirectiveCFISignalFrame(); | |||
584 | bool parseDirectiveCFIUndefined(SMLoc DirectiveLoc); | |||
585 | ||||
586 | // macro directives | |||
587 | bool parseDirectivePurgeMacro(SMLoc DirectiveLoc); | |||
588 | bool parseDirectiveExitMacro(StringRef Directive); | |||
589 | bool parseDirectiveEndMacro(StringRef Directive); | |||
590 | bool parseDirectiveMacro(SMLoc DirectiveLoc); | |||
591 | bool parseDirectiveMacrosOnOff(StringRef Directive); | |||
592 | // alternate macro mode directives | |||
593 | bool parseDirectiveAltmacro(StringRef Directive); | |||
594 | // ".bundle_align_mode" | |||
595 | bool parseDirectiveBundleAlignMode(); | |||
596 | // ".bundle_lock" | |||
597 | bool parseDirectiveBundleLock(); | |||
598 | // ".bundle_unlock" | |||
599 | bool parseDirectiveBundleUnlock(); | |||
600 | ||||
601 | // ".space", ".skip" | |||
602 | bool parseDirectiveSpace(StringRef IDVal); | |||
603 | ||||
604 | // ".dcb" | |||
605 | bool parseDirectiveDCB(StringRef IDVal, unsigned Size); | |||
606 | bool parseDirectiveRealDCB(StringRef IDVal, const fltSemantics &); | |||
607 | // ".ds" | |||
608 | bool parseDirectiveDS(StringRef IDVal, unsigned Size); | |||
609 | ||||
610 | // .sleb128 (Signed=true) and .uleb128 (Signed=false) | |||
611 | bool parseDirectiveLEB128(bool Signed); | |||
612 | ||||
613 | /// Parse a directive like ".globl" which | |||
614 | /// accepts a single symbol (which should be a label or an external). | |||
615 | bool parseDirectiveSymbolAttribute(MCSymbolAttr Attr); | |||
616 | ||||
617 | bool parseDirectiveComm(bool IsLocal); // ".comm" and ".lcomm" | |||
618 | ||||
619 | bool parseDirectiveAbort(); // ".abort" | |||
620 | bool parseDirectiveInclude(); // ".include" | |||
621 | bool parseDirectiveIncbin(); // ".incbin" | |||
622 | ||||
623 | // ".if", ".ifeq", ".ifge", ".ifgt" , ".ifle", ".iflt" or ".ifne" | |||
624 | bool parseDirectiveIf(SMLoc DirectiveLoc, DirectiveKind DirKind); | |||
625 | // ".ifb" or ".ifnb", depending on ExpectBlank. | |||
626 | bool parseDirectiveIfb(SMLoc DirectiveLoc, bool ExpectBlank); | |||
627 | // ".ifc" or ".ifnc", depending on ExpectEqual. | |||
628 | bool parseDirectiveIfc(SMLoc DirectiveLoc, bool ExpectEqual); | |||
629 | // ".ifeqs" or ".ifnes", depending on ExpectEqual. | |||
630 | bool parseDirectiveIfeqs(SMLoc DirectiveLoc, bool ExpectEqual); | |||
631 | // ".ifdef" or ".ifndef", depending on expect_defined | |||
632 | bool parseDirectiveIfdef(SMLoc DirectiveLoc, bool expect_defined); | |||
633 | bool parseDirectiveElseIf(SMLoc DirectiveLoc); // ".elseif" | |||
634 | bool parseDirectiveElse(SMLoc DirectiveLoc); // ".else" | |||
635 | bool parseDirectiveEndIf(SMLoc DirectiveLoc); // .endif | |||
636 | bool parseEscapedString(std::string &Data) override; | |||
637 | ||||
638 | const MCExpr *applyModifierToExpr(const MCExpr *E, | |||
639 | MCSymbolRefExpr::VariantKind Variant); | |||
640 | ||||
641 | // Macro-like directives | |||
642 | MCAsmMacro *parseMacroLikeBody(SMLoc DirectiveLoc); | |||
643 | void instantiateMacroLikeBody(MCAsmMacro *M, SMLoc DirectiveLoc, | |||
644 | raw_svector_ostream &OS); | |||
645 | bool parseDirectiveRept(SMLoc DirectiveLoc, StringRef Directive); | |||
646 | bool parseDirectiveIrp(SMLoc DirectiveLoc); // ".irp" | |||
647 | bool parseDirectiveIrpc(SMLoc DirectiveLoc); // ".irpc" | |||
648 | bool parseDirectiveEndr(SMLoc DirectiveLoc); // ".endr" | |||
649 | ||||
650 | // "_emit" or "__emit" | |||
651 | bool parseDirectiveMSEmit(SMLoc DirectiveLoc, ParseStatementInfo &Info, | |||
652 | size_t Len); | |||
653 | ||||
654 | // "align" | |||
655 | bool parseDirectiveMSAlign(SMLoc DirectiveLoc, ParseStatementInfo &Info); | |||
656 | ||||
657 | // "end" | |||
658 | bool parseDirectiveEnd(SMLoc DirectiveLoc); | |||
659 | ||||
660 | // ".err" or ".error" | |||
661 | bool parseDirectiveError(SMLoc DirectiveLoc, bool WithMessage); | |||
662 | ||||
663 | // ".warning" | |||
664 | bool parseDirectiveWarning(SMLoc DirectiveLoc); | |||
665 | ||||
666 | // .print <double-quotes-string> | |||
667 | bool parseDirectivePrint(SMLoc DirectiveLoc); | |||
668 | ||||
669 | // Directives to support address-significance tables. | |||
670 | bool parseDirectiveAddrsig(); | |||
671 | bool parseDirectiveAddrsigSym(); | |||
672 | ||||
673 | void initializeDirectiveKindMap(); | |||
674 | }; | |||
675 | ||||
676 | } // end anonymous namespace | |||
677 | ||||
678 | namespace llvm { | |||
679 | ||||
680 | extern MCAsmParserExtension *createDarwinAsmParser(); | |||
681 | extern MCAsmParserExtension *createELFAsmParser(); | |||
682 | extern MCAsmParserExtension *createCOFFAsmParser(); | |||
683 | extern MCAsmParserExtension *createWasmAsmParser(); | |||
684 | ||||
685 | } // end namespace llvm | |||
686 | ||||
687 | enum { DEFAULT_ADDRSPACE = 0 }; | |||
688 | ||||
689 | AsmParser::AsmParser(SourceMgr &SM, MCContext &Ctx, MCStreamer &Out, | |||
690 | const MCAsmInfo &MAI, unsigned CB = 0) | |||
691 | : Lexer(MAI), Ctx(Ctx), Out(Out), MAI(MAI), SrcMgr(SM), | |||
692 | CurBuffer(CB ? CB : SM.getMainFileID()), MacrosEnabledFlag(true) { | |||
693 | HadError = false; | |||
694 | // Save the old handler. | |||
695 | SavedDiagHandler = SrcMgr.getDiagHandler(); | |||
696 | SavedDiagContext = SrcMgr.getDiagContext(); | |||
697 | // Set our own handler which calls the saved handler. | |||
698 | SrcMgr.setDiagHandler(DiagHandler, this); | |||
699 | Lexer.setBuffer(SrcMgr.getMemoryBuffer(CurBuffer)->getBuffer()); | |||
700 | ||||
701 | // Initialize the platform / file format parser. | |||
702 | switch (Ctx.getObjectFileInfo()->getObjectFileType()) { | |||
703 | case MCObjectFileInfo::IsCOFF: | |||
704 | PlatformParser.reset(createCOFFAsmParser()); | |||
705 | break; | |||
706 | case MCObjectFileInfo::IsMachO: | |||
707 | PlatformParser.reset(createDarwinAsmParser()); | |||
708 | IsDarwin = true; | |||
709 | break; | |||
710 | case MCObjectFileInfo::IsELF: | |||
711 | PlatformParser.reset(createELFAsmParser()); | |||
712 | break; | |||
713 | case MCObjectFileInfo::IsWasm: | |||
714 | PlatformParser.reset(createWasmAsmParser()); | |||
715 | break; | |||
716 | case MCObjectFileInfo::IsXCOFF: | |||
717 | // TODO: Need to implement createXCOFFAsmParser for XCOFF format. | |||
718 | break; | |||
719 | } | |||
720 | ||||
721 | PlatformParser->Initialize(*this); | |||
722 | initializeDirectiveKindMap(); | |||
723 | ||||
724 | NumOfMacroInstantiations = 0; | |||
725 | } | |||
726 | ||||
727 | AsmParser::~AsmParser() { | |||
728 | 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-9~svn362543/lib/MC/MCParser/AsmParser.cpp" , 729, __PRETTY_FUNCTION__)) | |||
729 | "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-9~svn362543/lib/MC/MCParser/AsmParser.cpp" , 729, __PRETTY_FUNCTION__)); | |||
730 | ||||
731 | // Restore the saved diagnostics handler and context for use during | |||
732 | // finalization. | |||
733 | SrcMgr.setDiagHandler(SavedDiagHandler, SavedDiagContext); | |||
734 | } | |||
735 | ||||
736 | void AsmParser::printMacroInstantiations() { | |||
737 | // Print the active macro instantiation stack. | |||
738 | for (std::vector<MacroInstantiation *>::const_reverse_iterator | |||
739 | it = ActiveMacros.rbegin(), | |||
740 | ie = ActiveMacros.rend(); | |||
741 | it != ie; ++it) | |||
742 | printMessage((*it)->InstantiationLoc, SourceMgr::DK_Note, | |||
743 | "while in macro instantiation"); | |||
744 | } | |||
745 | ||||
746 | void AsmParser::Note(SMLoc L, const Twine &Msg, SMRange Range) { | |||
747 | printPendingErrors(); | |||
748 | printMessage(L, SourceMgr::DK_Note, Msg, Range); | |||
749 | printMacroInstantiations(); | |||
750 | } | |||
751 | ||||
752 | bool AsmParser::Warning(SMLoc L, const Twine &Msg, SMRange Range) { | |||
753 | if(getTargetParser().getTargetOptions().MCNoWarn) | |||
754 | return false; | |||
755 | if (getTargetParser().getTargetOptions().MCFatalWarnings) | |||
756 | return Error(L, Msg, Range); | |||
757 | printMessage(L, SourceMgr::DK_Warning, Msg, Range); | |||
758 | printMacroInstantiations(); | |||
759 | return false; | |||
760 | } | |||
761 | ||||
762 | bool AsmParser::printError(SMLoc L, const Twine &Msg, SMRange Range) { | |||
763 | HadError = true; | |||
764 | printMessage(L, SourceMgr::DK_Error, Msg, Range); | |||
765 | printMacroInstantiations(); | |||
766 | return true; | |||
767 | } | |||
768 | ||||
769 | bool AsmParser::enterIncludeFile(const std::string &Filename) { | |||
770 | std::string IncludedFile; | |||
771 | unsigned NewBuf = | |||
772 | SrcMgr.AddIncludeFile(Filename, Lexer.getLoc(), IncludedFile); | |||
773 | if (!NewBuf) | |||
774 | return true; | |||
775 | ||||
776 | CurBuffer = NewBuf; | |||
777 | Lexer.setBuffer(SrcMgr.getMemoryBuffer(CurBuffer)->getBuffer()); | |||
778 | return false; | |||
779 | } | |||
780 | ||||
781 | /// Process the specified .incbin file by searching for it in the include paths | |||
782 | /// then just emitting the byte contents of the file to the streamer. This | |||
783 | /// returns true on failure. | |||
784 | bool AsmParser::processIncbinFile(const std::string &Filename, int64_t Skip, | |||
785 | const MCExpr *Count, SMLoc Loc) { | |||
786 | std::string IncludedFile; | |||
787 | unsigned NewBuf = | |||
788 | SrcMgr.AddIncludeFile(Filename, Lexer.getLoc(), IncludedFile); | |||
789 | if (!NewBuf) | |||
790 | return true; | |||
791 | ||||
792 | // Pick up the bytes from the file and emit them. | |||
793 | StringRef Bytes = SrcMgr.getMemoryBuffer(NewBuf)->getBuffer(); | |||
794 | Bytes = Bytes.drop_front(Skip); | |||
795 | if (Count) { | |||
796 | int64_t Res; | |||
797 | if (!Count->evaluateAsAbsolute(Res, getStreamer().getAssemblerPtr())) | |||
798 | return Error(Loc, "expected absolute expression"); | |||
799 | if (Res < 0) | |||
800 | return Warning(Loc, "negative count has no effect"); | |||
801 | Bytes = Bytes.take_front(Res); | |||
802 | } | |||
803 | getStreamer().EmitBytes(Bytes); | |||
804 | return false; | |||
805 | } | |||
806 | ||||
807 | void AsmParser::jumpToLoc(SMLoc Loc, unsigned InBuffer) { | |||
808 | CurBuffer = InBuffer ? InBuffer : SrcMgr.FindBufferContainingLoc(Loc); | |||
809 | Lexer.setBuffer(SrcMgr.getMemoryBuffer(CurBuffer)->getBuffer(), | |||
810 | Loc.getPointer()); | |||
811 | } | |||
812 | ||||
813 | const AsmToken &AsmParser::Lex() { | |||
814 | if (Lexer.getTok().is(AsmToken::Error)) | |||
815 | Error(Lexer.getErrLoc(), Lexer.getErr()); | |||
816 | ||||
817 | // if it's a end of statement with a comment in it | |||
818 | if (getTok().is(AsmToken::EndOfStatement)) { | |||
819 | // if this is a line comment output it. | |||
820 | if (!getTok().getString().empty() && getTok().getString().front() != '\n' && | |||
821 | getTok().getString().front() != '\r' && MAI.preserveAsmComments()) | |||
822 | Out.addExplicitComment(Twine(getTok().getString())); | |||
823 | } | |||
824 | ||||
825 | const AsmToken *tok = &Lexer.Lex(); | |||
826 | ||||
827 | // Parse comments here to be deferred until end of next statement. | |||
828 | while (tok->is(AsmToken::Comment)) { | |||
829 | if (MAI.preserveAsmComments()) | |||
830 | Out.addExplicitComment(Twine(tok->getString())); | |||
831 | tok = &Lexer.Lex(); | |||
832 | } | |||
833 | ||||
834 | if (tok->is(AsmToken::Eof)) { | |||
835 | // If this is the end of an included file, pop the parent file off the | |||
836 | // include stack. | |||
837 | SMLoc ParentIncludeLoc = SrcMgr.getParentIncludeLoc(CurBuffer); | |||
838 | if (ParentIncludeLoc != SMLoc()) { | |||
839 | jumpToLoc(ParentIncludeLoc); | |||
840 | return Lex(); | |||
841 | } | |||
842 | } | |||
843 | ||||
844 | return *tok; | |||
845 | } | |||
846 | ||||
847 | bool AsmParser::enabledGenDwarfForAssembly() { | |||
848 | // Check whether the user specified -g. | |||
849 | if (!getContext().getGenDwarfForAssembly()) | |||
850 | return false; | |||
851 | // If we haven't encountered any .file directives (which would imply that | |||
852 | // the assembler source was produced with debug info already) then emit one | |||
853 | // describing the assembler source file itself. | |||
854 | if (getContext().getGenDwarfFileNumber() == 0) { | |||
855 | // Use the first #line directive for this, if any. It's preprocessed, so | |||
856 | // there is no checksum, and of course no source directive. | |||
857 | if (!FirstCppHashFilename.empty()) | |||
858 | getContext().setMCLineTableRootFile(/*CUID=*/0, | |||
859 | getContext().getCompilationDir(), | |||
860 | FirstCppHashFilename, | |||
861 | /*Cksum=*/None, /*Source=*/None); | |||
862 | const MCDwarfFile &RootFile = | |||
863 | getContext().getMCDwarfLineTable(/*CUID=*/0).getRootFile(); | |||
864 | getContext().setGenDwarfFileNumber(getStreamer().EmitDwarfFileDirective( | |||
865 | /*CUID=*/0, getContext().getCompilationDir(), RootFile.Name, | |||
866 | RootFile.Checksum, RootFile.Source)); | |||
867 | } | |||
868 | return true; | |||
869 | } | |||
870 | ||||
871 | bool AsmParser::Run(bool NoInitialTextSection, bool NoFinalize) { | |||
872 | // Create the initial section, if requested. | |||
873 | if (!NoInitialTextSection) | |||
874 | Out.InitSections(false); | |||
875 | ||||
876 | // Prime the lexer. | |||
877 | Lex(); | |||
878 | ||||
879 | HadError = false; | |||
880 | AsmCond StartingCondState = TheCondState; | |||
881 | SmallVector<AsmRewrite, 4> AsmStrRewrites; | |||
882 | ||||
883 | // If we are generating dwarf for assembly source files save the initial text | |||
884 | // section. (Don't use enabledGenDwarfForAssembly() here, as we aren't | |||
885 | // emitting any actual debug info yet and haven't had a chance to parse any | |||
886 | // embedded .file directives.) | |||
887 | if (getContext().getGenDwarfForAssembly()) { | |||
888 | MCSection *Sec = getStreamer().getCurrentSectionOnly(); | |||
889 | if (!Sec->getBeginSymbol()) { | |||
890 | MCSymbol *SectionStartSym = getContext().createTempSymbol(); | |||
891 | getStreamer().EmitLabel(SectionStartSym); | |||
892 | Sec->setBeginSymbol(SectionStartSym); | |||
893 | } | |||
894 | bool InsertResult = getContext().addGenDwarfSection(Sec); | |||
895 | 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-9~svn362543/lib/MC/MCParser/AsmParser.cpp" , 895, __PRETTY_FUNCTION__)); | |||
896 | (void)InsertResult; | |||
897 | } | |||
898 | ||||
899 | // While we have input, parse each statement. | |||
900 | while (Lexer.isNot(AsmToken::Eof)) { | |||
901 | ParseStatementInfo Info(&AsmStrRewrites); | |||
902 | if (!parseStatement(Info, nullptr)) | |||
903 | continue; | |||
904 | ||||
905 | // If we have a Lexer Error we are on an Error Token. Load in Lexer Error | |||
906 | // for printing ErrMsg via Lex() only if no (presumably better) parser error | |||
907 | // exists. | |||
908 | if (!hasPendingError() && Lexer.getTok().is(AsmToken::Error)) { | |||
909 | Lex(); | |||
910 | } | |||
911 | ||||
912 | // parseStatement returned true so may need to emit an error. | |||
913 | printPendingErrors(); | |||
914 | ||||
915 | // Skipping to the next line if needed. | |||
916 | if (!getLexer().isAtStartOfStatement()) | |||
917 | eatToEndOfStatement(); | |||
918 | } | |||
919 | ||||
920 | getTargetParser().onEndOfFile(); | |||
921 | printPendingErrors(); | |||
922 | ||||
923 | // All errors should have been emitted. | |||
924 | 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-9~svn362543/lib/MC/MCParser/AsmParser.cpp" , 924, __PRETTY_FUNCTION__)); | |||
925 | ||||
926 | getTargetParser().flushPendingInstructions(getStreamer()); | |||
927 | ||||
928 | if (TheCondState.TheCond != StartingCondState.TheCond || | |||
929 | TheCondState.Ignore != StartingCondState.Ignore) | |||
930 | printError(getTok().getLoc(), "unmatched .ifs or .elses"); | |||
931 | // Check to see there are no empty DwarfFile slots. | |||
932 | const auto &LineTables = getContext().getMCDwarfLineTables(); | |||
933 | if (!LineTables.empty()) { | |||
934 | unsigned Index = 0; | |||
935 | for (const auto &File : LineTables.begin()->second.getMCDwarfFiles()) { | |||
936 | if (File.Name.empty() && Index != 0) | |||
937 | printError(getTok().getLoc(), "unassigned file number: " + | |||
938 | Twine(Index) + | |||
939 | " for .file directives"); | |||
940 | ++Index; | |||
941 | } | |||
942 | } | |||
943 | ||||
944 | // Check to see that all assembler local symbols were actually defined. | |||
945 | // Targets that don't do subsections via symbols may not want this, though, | |||
946 | // so conservatively exclude them. Only do this if we're finalizing, though, | |||
947 | // as otherwise we won't necessarilly have seen everything yet. | |||
948 | if (!NoFinalize) { | |||
949 | if (MAI.hasSubsectionsViaSymbols()) { | |||
950 | for (const auto &TableEntry : getContext().getSymbols()) { | |||
951 | MCSymbol *Sym = TableEntry.getValue(); | |||
952 | // Variable symbols may not be marked as defined, so check those | |||
953 | // explicitly. If we know it's a variable, we have a definition for | |||
954 | // the purposes of this check. | |||
955 | if (Sym->isTemporary() && !Sym->isVariable() && !Sym->isDefined()) | |||
956 | // FIXME: We would really like to refer back to where the symbol was | |||
957 | // first referenced for a source location. We need to add something | |||
958 | // to track that. Currently, we just point to the end of the file. | |||
959 | printError(getTok().getLoc(), "assembler local symbol '" + | |||
960 | Sym->getName() + "' not defined"); | |||
961 | } | |||
962 | } | |||
963 | ||||
964 | // Temporary symbols like the ones for directional jumps don't go in the | |||
965 | // symbol table. They also need to be diagnosed in all (final) cases. | |||
966 | for (std::tuple<SMLoc, CppHashInfoTy, MCSymbol *> &LocSym : DirLabels) { | |||
967 | if (std::get<2>(LocSym)->isUndefined()) { | |||
968 | // Reset the state of any "# line file" directives we've seen to the | |||
969 | // context as it was at the diagnostic site. | |||
970 | CppHashInfo = std::get<1>(LocSym); | |||
971 | printError(std::get<0>(LocSym), "directional label undefined"); | |||
972 | } | |||
973 | } | |||
974 | } | |||
975 | ||||
976 | // Finalize the output stream if there are no errors and if the client wants | |||
977 | // us to. | |||
978 | if (!HadError && !NoFinalize) | |||
979 | Out.Finish(); | |||
980 | ||||
981 | return HadError || getContext().hadError(); | |||
982 | } | |||
983 | ||||
984 | bool AsmParser::checkForValidSection() { | |||
985 | if (!ParsingInlineAsm && !getStreamer().getCurrentSectionOnly()) { | |||
986 | Out.InitSections(false); | |||
987 | return Error(getTok().getLoc(), | |||
988 | "expected section directive before assembly directive"); | |||
989 | } | |||
990 | return false; | |||
991 | } | |||
992 | ||||
993 | /// Throw away the rest of the line for testing purposes. | |||
994 | void AsmParser::eatToEndOfStatement() { | |||
995 | while (Lexer.isNot(AsmToken::EndOfStatement) && Lexer.isNot(AsmToken::Eof)) | |||
996 | Lexer.Lex(); | |||
997 | ||||
998 | // Eat EOL. | |||
999 | if (Lexer.is(AsmToken::EndOfStatement)) | |||
1000 | Lexer.Lex(); | |||
1001 | } | |||
1002 | ||||
1003 | StringRef AsmParser::parseStringToEndOfStatement() { | |||
1004 | const char *Start = getTok().getLoc().getPointer(); | |||
1005 | ||||
1006 | while (Lexer.isNot(AsmToken::EndOfStatement) && Lexer.isNot(AsmToken::Eof)) | |||
1007 | Lexer.Lex(); | |||
1008 | ||||
1009 | const char *End = getTok().getLoc().getPointer(); | |||
1010 | return StringRef(Start, End - Start); | |||
1011 | } | |||
1012 | ||||
1013 | StringRef AsmParser::parseStringToComma() { | |||
1014 | const char *Start = getTok().getLoc().getPointer(); | |||
1015 | ||||
1016 | while (Lexer.isNot(AsmToken::EndOfStatement) && | |||
1017 | Lexer.isNot(AsmToken::Comma) && Lexer.isNot(AsmToken::Eof)) | |||
1018 | Lexer.Lex(); | |||
1019 | ||||
1020 | const char *End = getTok().getLoc().getPointer(); | |||
1021 | return StringRef(Start, End - Start); | |||
1022 | } | |||
1023 | ||||
1024 | /// Parse a paren expression and return it. | |||
1025 | /// NOTE: This assumes the leading '(' has already been consumed. | |||
1026 | /// | |||
1027 | /// parenexpr ::= expr) | |||
1028 | /// | |||
1029 | bool AsmParser::parseParenExpr(const MCExpr *&Res, SMLoc &EndLoc) { | |||
1030 | if (parseExpression(Res)) | |||
1031 | return true; | |||
1032 | if (Lexer.isNot(AsmToken::RParen)) | |||
1033 | return TokError("expected ')' in parentheses expression"); | |||
1034 | EndLoc = Lexer.getTok().getEndLoc(); | |||
1035 | Lex(); | |||
1036 | return false; | |||
1037 | } | |||
1038 | ||||
1039 | /// Parse a bracket expression and return it. | |||
1040 | /// NOTE: This assumes the leading '[' has already been consumed. | |||
1041 | /// | |||
1042 | /// bracketexpr ::= expr] | |||
1043 | /// | |||
1044 | bool AsmParser::parseBracketExpr(const MCExpr *&Res, SMLoc &EndLoc) { | |||
1045 | if (parseExpression(Res)) | |||
1046 | return true; | |||
1047 | EndLoc = getTok().getEndLoc(); | |||
1048 | if (parseToken(AsmToken::RBrac, "expected ']' in brackets expression")) | |||
1049 | return true; | |||
1050 | return false; | |||
1051 | } | |||
1052 | ||||
1053 | /// Parse a primary expression and return it. | |||
1054 | /// primaryexpr ::= (parenexpr | |||
1055 | /// primaryexpr ::= symbol | |||
1056 | /// primaryexpr ::= number | |||
1057 | /// primaryexpr ::= '.' | |||
1058 | /// primaryexpr ::= ~,+,- primaryexpr | |||
1059 | bool AsmParser::parsePrimaryExpr(const MCExpr *&Res, SMLoc &EndLoc) { | |||
1060 | SMLoc FirstTokenLoc = getLexer().getLoc(); | |||
1061 | AsmToken::TokenKind FirstTokenKind = Lexer.getKind(); | |||
1062 | switch (FirstTokenKind) { | |||
1063 | default: | |||
1064 | return TokError("unknown token in expression"); | |||
1065 | // If we have an error assume that we've already handled it. | |||
1066 | case AsmToken::Error: | |||
1067 | return true; | |||
1068 | case AsmToken::Exclaim: | |||
1069 | Lex(); // Eat the operator. | |||
1070 | if (parsePrimaryExpr(Res, EndLoc)) | |||
1071 | return true; | |||
1072 | Res = MCUnaryExpr::createLNot(Res, getContext(), FirstTokenLoc); | |||
1073 | return false; | |||
1074 | case AsmToken::Dollar: | |||
1075 | case AsmToken::At: | |||
1076 | case AsmToken::String: | |||
1077 | case AsmToken::Identifier: { | |||
1078 | StringRef Identifier; | |||
1079 | if (parseIdentifier(Identifier)) { | |||
1080 | // We may have failed but $ may be a valid token. | |||
1081 | if (getTok().is(AsmToken::Dollar)) { | |||
1082 | if (Lexer.getMAI().getDollarIsPC()) { | |||
1083 | Lex(); | |||
1084 | // This is a '$' reference, which references the current PC. Emit a | |||
1085 | // temporary label to the streamer and refer to it. | |||
1086 | MCSymbol *Sym = Ctx.createTempSymbol(); | |||
1087 | Out.EmitLabel(Sym); | |||
1088 | Res = MCSymbolRefExpr::create(Sym, MCSymbolRefExpr::VK_None, | |||
1089 | getContext()); | |||
1090 | EndLoc = FirstTokenLoc; | |||
1091 | return false; | |||
1092 | } | |||
1093 | return Error(FirstTokenLoc, "invalid token in expression"); | |||
1094 | } | |||
1095 | } | |||
1096 | // Parse symbol variant | |||
1097 | std::pair<StringRef, StringRef> Split; | |||
1098 | if (!MAI.useParensForSymbolVariant()) { | |||
1099 | if (FirstTokenKind == AsmToken::String) { | |||
1100 | if (Lexer.is(AsmToken::At)) { | |||
1101 | Lex(); // eat @ | |||
1102 | SMLoc AtLoc = getLexer().getLoc(); | |||
1103 | StringRef VName; | |||
1104 | if (parseIdentifier(VName)) | |||
1105 | return Error(AtLoc, "expected symbol variant after '@'"); | |||
1106 | ||||
1107 | Split = std::make_pair(Identifier, VName); | |||
1108 | } | |||
1109 | } else { | |||
1110 | Split = Identifier.split('@'); | |||
1111 | } | |||
1112 | } else if (Lexer.is(AsmToken::LParen)) { | |||
1113 | Lex(); // eat '('. | |||
1114 | StringRef VName; | |||
1115 | parseIdentifier(VName); | |||
1116 | // eat ')'. | |||
1117 | if (parseToken(AsmToken::RParen, | |||
1118 | "unexpected token in variant, expected ')'")) | |||
1119 | return true; | |||
1120 | Split = std::make_pair(Identifier, VName); | |||
1121 | } | |||
1122 | ||||
1123 | EndLoc = SMLoc::getFromPointer(Identifier.end()); | |||
1124 | ||||
1125 | // This is a symbol reference. | |||
1126 | StringRef SymbolName = Identifier; | |||
1127 | if (SymbolName.empty()) | |||
1128 | return Error(getLexer().getLoc(), "expected a symbol reference"); | |||
1129 | ||||
1130 | MCSymbolRefExpr::VariantKind Variant = MCSymbolRefExpr::VK_None; | |||
1131 | ||||
1132 | // Lookup the symbol variant if used. | |||
1133 | if (!Split.second.empty()) { | |||
1134 | Variant = MCSymbolRefExpr::getVariantKindForName(Split.second); | |||
1135 | if (Variant != MCSymbolRefExpr::VK_Invalid) { | |||
1136 | SymbolName = Split.first; | |||
1137 | } else if (MAI.doesAllowAtInName() && !MAI.useParensForSymbolVariant()) { | |||
1138 | Variant = MCSymbolRefExpr::VK_None; | |||
1139 | } else { | |||
1140 | return Error(SMLoc::getFromPointer(Split.second.begin()), | |||
1141 | "invalid variant '" + Split.second + "'"); | |||
1142 | } | |||
1143 | } | |||
1144 | ||||
1145 | MCSymbol *Sym = getContext().getOrCreateSymbol(SymbolName); | |||
1146 | ||||
1147 | // If this is an absolute variable reference, substitute it now to preserve | |||
1148 | // semantics in the face of reassignment. | |||
1149 | if (Sym->isVariable()) { | |||
1150 | auto V = Sym->getVariableValue(/*SetUsed*/ false); | |||
1151 | bool DoInline = isa<MCConstantExpr>(V) && !Variant; | |||
1152 | if (auto TV = dyn_cast<MCTargetExpr>(V)) | |||
1153 | DoInline = TV->inlineAssignedExpr(); | |||
1154 | if (DoInline) { | |||
1155 | if (Variant) | |||
1156 | return Error(EndLoc, "unexpected modifier on variable reference"); | |||
1157 | Res = Sym->getVariableValue(/*SetUsed*/ false); | |||
1158 | return false; | |||
1159 | } | |||
1160 | } | |||
1161 | ||||
1162 | // Otherwise create a symbol ref. | |||
1163 | Res = MCSymbolRefExpr::create(Sym, Variant, getContext(), FirstTokenLoc); | |||
1164 | return false; | |||
1165 | } | |||
1166 | case AsmToken::BigNum: | |||
1167 | return TokError("literal value out of range for directive"); | |||
1168 | case AsmToken::Integer: { | |||
1169 | SMLoc Loc = getTok().getLoc(); | |||
1170 | int64_t IntVal = getTok().getIntVal(); | |||
1171 | Res = MCConstantExpr::create(IntVal, getContext()); | |||
1172 | EndLoc = Lexer.getTok().getEndLoc(); | |||
1173 | Lex(); // Eat token. | |||
1174 | // Look for 'b' or 'f' following an Integer as a directional label | |||
1175 | if (Lexer.getKind() == AsmToken::Identifier) { | |||
1176 | StringRef IDVal = getTok().getString(); | |||
1177 | // Lookup the symbol variant if used. | |||
1178 | std::pair<StringRef, StringRef> Split = IDVal.split('@'); | |||
1179 | MCSymbolRefExpr::VariantKind Variant = MCSymbolRefExpr::VK_None; | |||
1180 | if (Split.first.size() != IDVal.size()) { | |||
1181 | Variant = MCSymbolRefExpr::getVariantKindForName(Split.second); | |||
1182 | if (Variant == MCSymbolRefExpr::VK_Invalid) | |||
1183 | return TokError("invalid variant '" + Split.second + "'"); | |||
1184 | IDVal = Split.first; | |||
1185 | } | |||
1186 | if (IDVal == "f" || IDVal == "b") { | |||
1187 | MCSymbol *Sym = | |||
1188 | Ctx.getDirectionalLocalSymbol(IntVal, IDVal == "b"); | |||
1189 | Res = MCSymbolRefExpr::create(Sym, Variant, getContext()); | |||
1190 | if (IDVal == "b" && Sym->isUndefined()) | |||
1191 | return Error(Loc, "directional label undefined"); | |||
1192 | DirLabels.push_back(std::make_tuple(Loc, CppHashInfo, Sym)); | |||
1193 | EndLoc = Lexer.getTok().getEndLoc(); | |||
1194 | Lex(); // Eat identifier. | |||
1195 | } | |||
1196 | } | |||
1197 | return false; | |||
1198 | } | |||
1199 | case AsmToken::Real: { | |||
1200 | APFloat RealVal(APFloat::IEEEdouble(), getTok().getString()); | |||
1201 | uint64_t IntVal = RealVal.bitcastToAPInt().getZExtValue(); | |||
1202 | Res = MCConstantExpr::create(IntVal, getContext()); | |||
1203 | EndLoc = Lexer.getTok().getEndLoc(); | |||
1204 | Lex(); // Eat token. | |||
1205 | return false; | |||
1206 | } | |||
1207 | case AsmToken::Dot: { | |||
1208 | // This is a '.' reference, which references the current PC. Emit a | |||
1209 | // temporary label to the streamer and refer to it. | |||
1210 | MCSymbol *Sym = Ctx.createTempSymbol(); | |||
1211 | Out.EmitLabel(Sym); | |||
1212 | Res = MCSymbolRefExpr::create(Sym, MCSymbolRefExpr::VK_None, getContext()); | |||
1213 | EndLoc = Lexer.getTok().getEndLoc(); | |||
1214 | Lex(); // Eat identifier. | |||
1215 | return false; | |||
1216 | } | |||
1217 | case AsmToken::LParen: | |||
1218 | Lex(); // Eat the '('. | |||
1219 | return parseParenExpr(Res, EndLoc); | |||
1220 | case AsmToken::LBrac: | |||
1221 | if (!PlatformParser->HasBracketExpressions()) | |||
1222 | return TokError("brackets expression not supported on this target"); | |||
1223 | Lex(); // Eat the '['. | |||
1224 | return parseBracketExpr(Res, EndLoc); | |||
1225 | case AsmToken::Minus: | |||
1226 | Lex(); // Eat the operator. | |||
1227 | if (parsePrimaryExpr(Res, EndLoc)) | |||
1228 | return true; | |||
1229 | Res = MCUnaryExpr::createMinus(Res, getContext(), FirstTokenLoc); | |||
1230 | return false; | |||
1231 | case AsmToken::Plus: | |||
1232 | Lex(); // Eat the operator. | |||
1233 | if (parsePrimaryExpr(Res, EndLoc)) | |||
1234 | return true; | |||
1235 | Res = MCUnaryExpr::createPlus(Res, getContext(), FirstTokenLoc); | |||
1236 | return false; | |||
1237 | case AsmToken::Tilde: | |||
1238 | Lex(); // Eat the operator. | |||
1239 | if (parsePrimaryExpr(Res, EndLoc)) | |||
1240 | return true; | |||
1241 | Res = MCUnaryExpr::createNot(Res, getContext(), FirstTokenLoc); | |||
1242 | return false; | |||
1243 | // MIPS unary expression operators. The lexer won't generate these tokens if | |||
1244 | // MCAsmInfo::HasMipsExpressions is false for the target. | |||
1245 | case AsmToken::PercentCall16: | |||
1246 | case AsmToken::PercentCall_Hi: | |||
1247 | case AsmToken::PercentCall_Lo: | |||
1248 | case AsmToken::PercentDtprel_Hi: | |||
1249 | case AsmToken::PercentDtprel_Lo: | |||
1250 | case AsmToken::PercentGot: | |||
1251 | case AsmToken::PercentGot_Disp: | |||
1252 | case AsmToken::PercentGot_Hi: | |||
1253 | case AsmToken::PercentGot_Lo: | |||
1254 | case AsmToken::PercentGot_Ofst: | |||
1255 | case AsmToken::PercentGot_Page: | |||
1256 | case AsmToken::PercentGottprel: | |||
1257 | case AsmToken::PercentGp_Rel: | |||
1258 | case AsmToken::PercentHi: | |||
1259 | case AsmToken::PercentHigher: | |||
1260 | case AsmToken::PercentHighest: | |||
1261 | case AsmToken::PercentLo: | |||
1262 | case AsmToken::PercentNeg: | |||
1263 | case AsmToken::PercentPcrel_Hi: | |||
1264 | case AsmToken::PercentPcrel_Lo: | |||
1265 | case AsmToken::PercentTlsgd: | |||
1266 | case AsmToken::PercentTlsldm: | |||
1267 | case AsmToken::PercentTprel_Hi: | |||
1268 | case AsmToken::PercentTprel_Lo: | |||
1269 | Lex(); // Eat the operator. | |||
1270 | if (Lexer.isNot(AsmToken::LParen)) | |||
1271 | return TokError("expected '(' after operator"); | |||
1272 | Lex(); // Eat the operator. | |||
1273 | if (parseExpression(Res, EndLoc)) | |||
1274 | return true; | |||
1275 | if (Lexer.isNot(AsmToken::RParen)) | |||
1276 | return TokError("expected ')'"); | |||
1277 | Lex(); // Eat the operator. | |||
1278 | Res = getTargetParser().createTargetUnaryExpr(Res, FirstTokenKind, Ctx); | |||
1279 | return !Res; | |||
1280 | } | |||
1281 | } | |||
1282 | ||||
1283 | bool AsmParser::parseExpression(const MCExpr *&Res) { | |||
1284 | SMLoc EndLoc; | |||
1285 | return parseExpression(Res, EndLoc); | |||
1286 | } | |||
1287 | ||||
1288 | const MCExpr * | |||
1289 | AsmParser::applyModifierToExpr(const MCExpr *E, | |||
1290 | MCSymbolRefExpr::VariantKind Variant) { | |||
1291 | // Ask the target implementation about this expression first. | |||
1292 | const MCExpr *NewE = getTargetParser().applyModifierToExpr(E, Variant, Ctx); | |||
1293 | if (NewE) | |||
1294 | return NewE; | |||
1295 | // Recurse over the given expression, rebuilding it to apply the given variant | |||
1296 | // if there is exactly one symbol. | |||
1297 | switch (E->getKind()) { | |||
1298 | case MCExpr::Target: | |||
1299 | case MCExpr::Constant: | |||
1300 | return nullptr; | |||
1301 | ||||
1302 | case MCExpr::SymbolRef: { | |||
1303 | const MCSymbolRefExpr *SRE = cast<MCSymbolRefExpr>(E); | |||
1304 | ||||
1305 | if (SRE->getKind() != MCSymbolRefExpr::VK_None) { | |||
1306 | TokError("invalid variant on expression '" + getTok().getIdentifier() + | |||
1307 | "' (already modified)"); | |||
1308 | return E; | |||
1309 | } | |||
1310 | ||||
1311 | return MCSymbolRefExpr::create(&SRE->getSymbol(), Variant, getContext()); | |||
1312 | } | |||
1313 | ||||
1314 | case MCExpr::Unary: { | |||
1315 | const MCUnaryExpr *UE = cast<MCUnaryExpr>(E); | |||
1316 | const MCExpr *Sub = applyModifierToExpr(UE->getSubExpr(), Variant); | |||
1317 | if (!Sub) | |||
1318 | return nullptr; | |||
1319 | return MCUnaryExpr::create(UE->getOpcode(), Sub, getContext()); | |||
1320 | } | |||
1321 | ||||
1322 | case MCExpr::Binary: { | |||
1323 | const MCBinaryExpr *BE = cast<MCBinaryExpr>(E); | |||
1324 | const MCExpr *LHS = applyModifierToExpr(BE->getLHS(), Variant); | |||
1325 | const MCExpr *RHS = applyModifierToExpr(BE->getRHS(), Variant); | |||
1326 | ||||
1327 | if (!LHS && !RHS) | |||
1328 | return nullptr; | |||
1329 | ||||
1330 | if (!LHS) | |||
1331 | LHS = BE->getLHS(); | |||
1332 | if (!RHS) | |||
1333 | RHS = BE->getRHS(); | |||
1334 | ||||
1335 | return MCBinaryExpr::create(BE->getOpcode(), LHS, RHS, getContext()); | |||
1336 | } | |||
1337 | } | |||
1338 | ||||
1339 | llvm_unreachable("Invalid expression kind!")::llvm::llvm_unreachable_internal("Invalid expression kind!", "/build/llvm-toolchain-snapshot-9~svn362543/lib/MC/MCParser/AsmParser.cpp" , 1339); | |||
1340 | } | |||
1341 | ||||
1342 | /// This function checks if the next token is <string> type or arithmetic. | |||
1343 | /// string that begin with character '<' must end with character '>'. | |||
1344 | /// otherwise it is arithmetics. | |||
1345 | /// If the function returns a 'true' value, | |||
1346 | /// the End argument will be filled with the last location pointed to the '>' | |||
1347 | /// character. | |||
1348 | ||||
1349 | /// There is a gap between the AltMacro's documentation and the single quote | |||
1350 | /// implementation. GCC does not fully support this feature and so we will not | |||
1351 | /// support it. | |||
1352 | /// TODO: Adding single quote as a string. | |||
1353 | static bool isAltmacroString(SMLoc &StrLoc, SMLoc &EndLoc) { | |||
1354 | 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-9~svn362543/lib/MC/MCParser/AsmParser.cpp" , 1355, __PRETTY_FUNCTION__)) | |||
1355 | "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-9~svn362543/lib/MC/MCParser/AsmParser.cpp" , 1355, __PRETTY_FUNCTION__)); | |||
1356 | const char *CharPtr = StrLoc.getPointer(); | |||
1357 | while ((*CharPtr != '>') && (*CharPtr != '\n') && (*CharPtr != '\r') && | |||
1358 | (*CharPtr != '\0')) { | |||
1359 | if (*CharPtr == '!') | |||
1360 | CharPtr++; | |||
1361 | CharPtr++; | |||
1362 | } | |||
1363 | if (*CharPtr == '>') { | |||
1364 | EndLoc = StrLoc.getFromPointer(CharPtr + 1); | |||
1365 | return true; | |||
1366 | } | |||
1367 | return false; | |||
1368 | } | |||
1369 | ||||
1370 | /// creating a string without the escape characters '!'. | |||
1371 | static std::string altMacroString(StringRef AltMacroStr) { | |||
1372 | std::string Res; | |||
1373 | for (size_t Pos = 0; Pos < AltMacroStr.size(); Pos++) { | |||
1374 | if (AltMacroStr[Pos] == '!') | |||
1375 | Pos++; | |||
1376 | Res += AltMacroStr[Pos]; | |||
1377 | } | |||
1378 | return Res; | |||
1379 | } | |||
1380 | ||||
1381 | /// Parse an expression and return it. | |||
1382 | /// | |||
1383 | /// expr ::= expr &&,|| expr -> lowest. | |||
1384 | /// expr ::= expr |,^,&,! expr | |||
1385 | /// expr ::= expr ==,!=,<>,<,<=,>,>= expr | |||
1386 | /// expr ::= expr <<,>> expr | |||
1387 | /// expr ::= expr +,- expr | |||
1388 | /// expr ::= expr *,/,% expr -> highest. | |||
1389 | /// expr ::= primaryexpr | |||
1390 | /// | |||
1391 | bool AsmParser::parseExpression(const MCExpr *&Res, SMLoc &EndLoc) { | |||
1392 | // Parse the expression. | |||
1393 | Res = nullptr; | |||
1394 | if (getTargetParser().parsePrimaryExpr(Res, EndLoc) || | |||
1395 | parseBinOpRHS(1, Res, EndLoc)) | |||
1396 | return true; | |||
1397 | ||||
1398 | // As a special case, we support 'a op b @ modifier' by rewriting the | |||
1399 | // expression to include the modifier. This is inefficient, but in general we | |||
1400 | // expect users to use 'a@modifier op b'. | |||
1401 | if (Lexer.getKind() == AsmToken::At) { | |||
1402 | Lex(); | |||
1403 | ||||
1404 | if (Lexer.isNot(AsmToken::Identifier)) | |||
1405 | return TokError("unexpected symbol modifier following '@'"); | |||
1406 | ||||
1407 | MCSymbolRefExpr::VariantKind Variant = | |||
1408 | MCSymbolRefExpr::getVariantKindForName(getTok().getIdentifier()); | |||
1409 | if (Variant == MCSymbolRefExpr::VK_Invalid) | |||
1410 | return TokError("invalid variant '" + getTok().getIdentifier() + "'"); | |||
1411 | ||||
1412 | const MCExpr *ModifiedRes = applyModifierToExpr(Res, Variant); | |||
1413 | if (!ModifiedRes) { | |||
1414 | return TokError("invalid modifier '" + getTok().getIdentifier() + | |||
1415 | "' (no symbols present)"); | |||
1416 | } | |||
1417 | ||||
1418 | Res = ModifiedRes; | |||
1419 | Lex(); | |||
1420 | } | |||
1421 | ||||
1422 | // Try to constant fold it up front, if possible. Do not exploit | |||
1423 | // assembler here. | |||
1424 | int64_t Value; | |||
1425 | if (Res->evaluateAsAbsolute(Value)) | |||
1426 | Res = MCConstantExpr::create(Value, getContext()); | |||
1427 | ||||
1428 | return false; | |||
1429 | } | |||
1430 | ||||
1431 | bool AsmParser::parseParenExpression(const MCExpr *&Res, SMLoc &EndLoc) { | |||
1432 | Res = nullptr; | |||
1433 | return parseParenExpr(Res, EndLoc) || parseBinOpRHS(1, Res, EndLoc); | |||
1434 | } | |||
1435 | ||||
1436 | bool AsmParser::parseParenExprOfDepth(unsigned ParenDepth, const MCExpr *&Res, | |||
1437 | SMLoc &EndLoc) { | |||
1438 | if (parseParenExpr(Res, EndLoc)) | |||
1439 | return true; | |||
1440 | ||||
1441 | for (; ParenDepth > 0; --ParenDepth) { | |||
1442 | if (parseBinOpRHS(1, Res, EndLoc)) | |||
1443 | return true; | |||
1444 | ||||
1445 | // We don't Lex() the last RParen. | |||
1446 | // This is the same behavior as parseParenExpression(). | |||
1447 | if (ParenDepth - 1 > 0) { | |||
1448 | EndLoc = getTok().getEndLoc(); | |||
1449 | if (parseToken(AsmToken::RParen, | |||
1450 | "expected ')' in parentheses expression")) | |||
1451 | return true; | |||
1452 | } | |||
1453 | } | |||
1454 | return false; | |||
1455 | } | |||
1456 | ||||
1457 | bool AsmParser::parseAbsoluteExpression(int64_t &Res) { | |||
1458 | const MCExpr *Expr; | |||
1459 | ||||
1460 | SMLoc StartLoc = Lexer.getLoc(); | |||
1461 | if (parseExpression(Expr)) | |||
1462 | return true; | |||
1463 | ||||
1464 | if (!Expr->evaluateAsAbsolute(Res, getStreamer().getAssemblerPtr())) | |||
1465 | return Error(StartLoc, "expected absolute expression"); | |||
1466 | ||||
1467 | return false; | |||
1468 | } | |||
1469 | ||||
1470 | static unsigned getDarwinBinOpPrecedence(AsmToken::TokenKind K, | |||
1471 | MCBinaryExpr::Opcode &Kind, | |||
1472 | bool ShouldUseLogicalShr) { | |||
1473 | switch (K) { | |||
1474 | default: | |||
1475 | return 0; // not a binop. | |||
1476 | ||||
1477 | // Lowest Precedence: &&, || | |||
1478 | case AsmToken::AmpAmp: | |||
1479 | Kind = MCBinaryExpr::LAnd; | |||
1480 | return 1; | |||
1481 | case AsmToken::PipePipe: | |||
1482 | Kind = MCBinaryExpr::LOr; | |||
1483 | return 1; | |||
1484 | ||||
1485 | // Low Precedence: |, &, ^ | |||
1486 | // | |||
1487 | // FIXME: gas seems to support '!' as an infix operator? | |||
1488 | case AsmToken::Pipe: | |||
1489 | Kind = MCBinaryExpr::Or; | |||
1490 | return 2; | |||
1491 | case AsmToken::Caret: | |||
1492 | Kind = MCBinaryExpr::Xor; | |||
1493 | return 2; | |||
1494 | case AsmToken::Amp: | |||
1495 | Kind = MCBinaryExpr::And; | |||
1496 | return 2; | |||
1497 | ||||
1498 | // Low Intermediate Precedence: ==, !=, <>, <, <=, >, >= | |||
1499 | case AsmToken::EqualEqual: | |||
1500 | Kind = MCBinaryExpr::EQ; | |||
1501 | return 3; | |||
1502 | case AsmToken::ExclaimEqual: | |||
1503 | case AsmToken::LessGreater: | |||
1504 | Kind = MCBinaryExpr::NE; | |||
1505 | return 3; | |||
1506 | case AsmToken::Less: | |||
1507 | Kind = MCBinaryExpr::LT; | |||
1508 | return 3; | |||
1509 | case AsmToken::LessEqual: | |||
1510 | Kind = MCBinaryExpr::LTE; | |||
1511 | return 3; | |||
1512 | case AsmToken::Greater: | |||
1513 | Kind = MCBinaryExpr::GT; | |||
1514 | return 3; | |||
1515 | case AsmToken::GreaterEqual: | |||
1516 | Kind = MCBinaryExpr::GTE; | |||
1517 | return 3; | |||
1518 | ||||
1519 | // Intermediate Precedence: <<, >> | |||
1520 | case AsmToken::LessLess: | |||
1521 | Kind = MCBinaryExpr::Shl; | |||
1522 | return 4; | |||
1523 | case AsmToken::GreaterGreater: | |||
1524 | Kind = ShouldUseLogicalShr ? MCBinaryExpr::LShr : MCBinaryExpr::AShr; | |||
1525 | return 4; | |||
1526 | ||||
1527 | // High Intermediate Precedence: +, - | |||
1528 | case AsmToken::Plus: | |||
1529 | Kind = MCBinaryExpr::Add; | |||
1530 | return 5; | |||
1531 | case AsmToken::Minus: | |||
1532 | Kind = MCBinaryExpr::Sub; | |||
1533 | return 5; | |||
1534 | ||||
1535 | // Highest Precedence: *, /, % | |||
1536 | case AsmToken::Star: | |||
1537 | Kind = MCBinaryExpr::Mul; | |||
1538 | return 6; | |||
1539 | case AsmToken::Slash: | |||
1540 | Kind = MCBinaryExpr::Div; | |||
1541 | return 6; | |||
1542 | case AsmToken::Percent: | |||
1543 | Kind = MCBinaryExpr::Mod; | |||
1544 | return 6; | |||
1545 | } | |||
1546 | } | |||
1547 | ||||
1548 | static unsigned getGNUBinOpPrecedence(AsmToken::TokenKind K, | |||
1549 | MCBinaryExpr::Opcode &Kind, | |||
1550 | bool ShouldUseLogicalShr) { | |||
1551 | switch (K) { | |||
1552 | default: | |||
1553 | return 0; // not a binop. | |||
1554 | ||||
1555 | // Lowest Precedence: &&, || | |||
1556 | case AsmToken::AmpAmp: | |||
1557 | Kind = MCBinaryExpr::LAnd; | |||
1558 | return 2; | |||
1559 | case AsmToken::PipePipe: | |||
1560 | Kind = MCBinaryExpr::LOr; | |||
1561 | return 1; | |||
1562 | ||||
1563 | // Low Precedence: ==, !=, <>, <, <=, >, >= | |||
1564 | case AsmToken::EqualEqual: | |||
1565 | Kind = MCBinaryExpr::EQ; | |||
1566 | return 3; | |||
1567 | case AsmToken::ExclaimEqual: | |||
1568 | case AsmToken::LessGreater: | |||
1569 | Kind = MCBinaryExpr::NE; | |||
1570 | return 3; | |||
1571 | case AsmToken::Less: | |||
1572 | Kind = MCBinaryExpr::LT; | |||
1573 | return 3; | |||
1574 | case AsmToken::LessEqual: | |||
1575 | Kind = MCBinaryExpr::LTE; | |||
1576 | return 3; | |||
1577 | case AsmToken::Greater: | |||
1578 | Kind = MCBinaryExpr::GT; | |||
1579 | return 3; | |||
1580 | case AsmToken::GreaterEqual: | |||
1581 | Kind = MCBinaryExpr::GTE; | |||
1582 | return 3; | |||
1583 | ||||
1584 | // Low Intermediate Precedence: +, - | |||
1585 | case AsmToken::Plus: | |||
1586 | Kind = MCBinaryExpr::Add; | |||
1587 | return 4; | |||
1588 | case AsmToken::Minus: | |||
1589 | Kind = MCBinaryExpr::Sub; | |||
1590 | return 4; | |||
1591 | ||||
1592 | // High Intermediate Precedence: |, &, ^ | |||
1593 | // | |||
1594 | // FIXME: gas seems to support '!' as an infix operator? | |||
1595 | case AsmToken::Pipe: | |||
1596 | Kind = MCBinaryExpr::Or; | |||
1597 | return 5; | |||
1598 | case AsmToken::Caret: | |||
1599 | Kind = MCBinaryExpr::Xor; | |||
1600 | return 5; | |||
1601 | case AsmToken::Amp: | |||
1602 | Kind = MCBinaryExpr::And; | |||
1603 | return 5; | |||
1604 | ||||
1605 | // Highest Precedence: *, /, %, <<, >> | |||
1606 | case AsmToken::Star: | |||
1607 | Kind = MCBinaryExpr::Mul; | |||
1608 | return 6; | |||
1609 | case AsmToken::Slash: | |||
1610 | Kind = MCBinaryExpr::Div; | |||
1611 | return 6; | |||
1612 | case AsmToken::Percent: | |||
1613 | Kind = MCBinaryExpr::Mod; | |||
1614 | return 6; | |||
1615 | case AsmToken::LessLess: | |||
1616 | Kind = MCBinaryExpr::Shl; | |||
1617 | return 6; | |||
1618 | case AsmToken::GreaterGreater: | |||
1619 | Kind = ShouldUseLogicalShr ? MCBinaryExpr::LShr : MCBinaryExpr::AShr; | |||
1620 | return 6; | |||
1621 | } | |||
1622 | } | |||
1623 | ||||
1624 | unsigned AsmParser::getBinOpPrecedence(AsmToken::TokenKind K, | |||
1625 | MCBinaryExpr::Opcode &Kind) { | |||
1626 | bool ShouldUseLogicalShr = MAI.shouldUseLogicalShr(); | |||
1627 | return IsDarwin ? getDarwinBinOpPrecedence(K, Kind, ShouldUseLogicalShr) | |||
1628 | : getGNUBinOpPrecedence(K, Kind, ShouldUseLogicalShr); | |||
1629 | } | |||
1630 | ||||
1631 | /// Parse all binary operators with precedence >= 'Precedence'. | |||
1632 | /// Res contains the LHS of the expression on input. | |||
1633 | bool AsmParser::parseBinOpRHS(unsigned Precedence, const MCExpr *&Res, | |||
1634 | SMLoc &EndLoc) { | |||
1635 | SMLoc StartLoc = Lexer.getLoc(); | |||
1636 | while (true) { | |||
1637 | MCBinaryExpr::Opcode Kind = MCBinaryExpr::Add; | |||
1638 | unsigned TokPrec = getBinOpPrecedence(Lexer.getKind(), Kind); | |||
1639 | ||||
1640 | // If the next token is lower precedence than we are allowed to eat, return | |||
1641 | // successfully with what we ate already. | |||
1642 | if (TokPrec < Precedence) | |||
1643 | return false; | |||
1644 | ||||
1645 | Lex(); | |||
1646 | ||||
1647 | // Eat the next primary expression. | |||
1648 | const MCExpr *RHS; | |||
1649 | if (getTargetParser().parsePrimaryExpr(RHS, EndLoc)) | |||
1650 | return true; | |||
1651 | ||||
1652 | // If BinOp binds less tightly with RHS than the operator after RHS, let | |||
1653 | // the pending operator take RHS as its LHS. | |||
1654 | MCBinaryExpr::Opcode Dummy; | |||
1655 | unsigned NextTokPrec = getBinOpPrecedence(Lexer.getKind(), Dummy); | |||
1656 | if (TokPrec < NextTokPrec && parseBinOpRHS(TokPrec + 1, RHS, EndLoc)) | |||
1657 | return true; | |||
1658 | ||||
1659 | // Merge LHS and RHS according to operator. | |||
1660 | Res = MCBinaryExpr::create(Kind, Res, RHS, getContext(), StartLoc); | |||
1661 | } | |||
1662 | } | |||
1663 | ||||
1664 | /// ParseStatement: | |||
1665 | /// ::= EndOfStatement | |||
1666 | /// ::= Label* Directive ...Operands... EndOfStatement | |||
1667 | /// ::= Label* Identifier OperandList* EndOfStatement | |||
1668 | bool AsmParser::parseStatement(ParseStatementInfo &Info, | |||
1669 | MCAsmParserSemaCallback *SI) { | |||
1670 | 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-9~svn362543/lib/MC/MCParser/AsmParser.cpp" , 1670, __PRETTY_FUNCTION__)); | |||
1671 | // Eat initial spaces and comments | |||
1672 | while (Lexer.is(AsmToken::Space)) | |||
1673 | Lex(); | |||
1674 | if (Lexer.is(AsmToken::EndOfStatement)) { | |||
1675 | // if this is a line comment we can drop it safely | |||
1676 | if (getTok().getString().empty() || getTok().getString().front() == '\r' || | |||
1677 | getTok().getString().front() == '\n') | |||
1678 | Out.AddBlankLine(); | |||
1679 | Lex(); | |||
1680 | return false; | |||
1681 | } | |||
1682 | // Statements always start with an identifier. | |||
1683 | AsmToken ID = getTok(); | |||
1684 | SMLoc IDLoc = ID.getLoc(); | |||
1685 | StringRef IDVal; | |||
1686 | int64_t LocalLabelVal = -1; | |||
1687 | if (Lexer.is(AsmToken::HashDirective)) | |||
1688 | return parseCppHashLineFilenameComment(IDLoc); | |||
1689 | // Allow an integer followed by a ':' as a directional local label. | |||
1690 | if (Lexer.is(AsmToken::Integer)) { | |||
1691 | LocalLabelVal = getTok().getIntVal(); | |||
1692 | if (LocalLabelVal < 0) { | |||
1693 | if (!TheCondState.Ignore) { | |||
1694 | Lex(); // always eat a token | |||
1695 | return Error(IDLoc, "unexpected token at start of statement"); | |||
1696 | } | |||
1697 | IDVal = ""; | |||
1698 | } else { | |||
1699 | IDVal = getTok().getString(); | |||
1700 | Lex(); // Consume the integer token to be used as an identifier token. | |||
1701 | if (Lexer.getKind() != AsmToken::Colon) { | |||
1702 | if (!TheCondState.Ignore) { | |||
1703 | Lex(); // always eat a token | |||
1704 | return Error(IDLoc, "unexpected token at start of statement"); | |||
1705 | } | |||
1706 | } | |||
1707 | } | |||
1708 | } else if (Lexer.is(AsmToken::Dot)) { | |||
1709 | // Treat '.' as a valid identifier in this context. | |||
1710 | Lex(); | |||
1711 | IDVal = "."; | |||
1712 | } else if (Lexer.is(AsmToken::LCurly)) { | |||
1713 | // Treat '{' as a valid identifier in this context. | |||
1714 | Lex(); | |||
1715 | IDVal = "{"; | |||
1716 | ||||
1717 | } else if (Lexer.is(AsmToken::RCurly)) { | |||
1718 | // Treat '}' as a valid identifier in this context. | |||
1719 | Lex(); | |||
1720 | IDVal = "}"; | |||
1721 | } else if (Lexer.is(AsmToken::Star) && | |||
1722 | getTargetParser().starIsStartOfStatement()) { | |||
1723 | // Accept '*' as a valid start of statement. | |||
1724 | Lex(); | |||
1725 | IDVal = "*"; | |||
1726 | } else if (parseIdentifier(IDVal)) { | |||
1727 | if (!TheCondState.Ignore) { | |||
1728 | Lex(); // always eat a token | |||
1729 | return Error(IDLoc, "unexpected token at start of statement"); | |||
1730 | } | |||
1731 | IDVal = ""; | |||
1732 | } | |||
1733 | ||||
1734 | // Handle conditional assembly here before checking for skipping. We | |||
1735 | // have to do this so that .endif isn't skipped in a ".if 0" block for | |||
1736 | // example. | |||
1737 | StringMap<DirectiveKind>::const_iterator DirKindIt = | |||
1738 | DirectiveKindMap.find(IDVal); | |||
1739 | DirectiveKind DirKind = (DirKindIt == DirectiveKindMap.end()) | |||
1740 | ? DK_NO_DIRECTIVE | |||
1741 | : DirKindIt->getValue(); | |||
1742 | switch (DirKind) { | |||
1743 | default: | |||
1744 | break; | |||
1745 | case DK_IF: | |||
1746 | case DK_IFEQ: | |||
1747 | case DK_IFGE: | |||
1748 | case DK_IFGT: | |||
1749 | case DK_IFLE: | |||
1750 | case DK_IFLT: | |||
1751 | case DK_IFNE: | |||
1752 | return parseDirectiveIf(IDLoc, DirKind); | |||
1753 | case DK_IFB: | |||
1754 | return parseDirectiveIfb(IDLoc, true); | |||
1755 | case DK_IFNB: | |||
1756 | return parseDirectiveIfb(IDLoc, false); | |||
1757 | case DK_IFC: | |||
1758 | return parseDirectiveIfc(IDLoc, true); | |||
1759 | case DK_IFEQS: | |||
1760 | return parseDirectiveIfeqs(IDLoc, true); | |||
1761 | case DK_IFNC: | |||
1762 | return parseDirectiveIfc(IDLoc, false); | |||
1763 | case DK_IFNES: | |||
1764 | return parseDirectiveIfeqs(IDLoc, false); | |||
1765 | case DK_IFDEF: | |||
1766 | return parseDirectiveIfdef(IDLoc, true); | |||
1767 | case DK_IFNDEF: | |||
1768 | case DK_IFNOTDEF: | |||
1769 | return parseDirectiveIfdef(IDLoc, false); | |||
1770 | case DK_ELSEIF: | |||
1771 | return parseDirectiveElseIf(IDLoc); | |||
1772 | case DK_ELSE: | |||
1773 | return parseDirectiveElse(IDLoc); | |||
1774 | case DK_ENDIF: | |||
1775 | return parseDirectiveEndIf(IDLoc); | |||
1776 | } | |||
1777 | ||||
1778 | // Ignore the statement if in the middle of inactive conditional | |||
1779 | // (e.g. ".if 0"). | |||
1780 | if (TheCondState.Ignore) { | |||
1781 | eatToEndOfStatement(); | |||
1782 | return false; | |||
1783 | } | |||
1784 | ||||
1785 | // FIXME: Recurse on local labels? | |||
1786 | ||||
1787 | // See what kind of statement we have. | |||
1788 | switch (Lexer.getKind()) { | |||
1789 | case AsmToken::Colon: { | |||
1790 | if (!getTargetParser().isLabel(ID)) | |||
1791 | break; | |||
1792 | if (checkForValidSection()) | |||
1793 | return true; | |||
1794 | ||||
1795 | // identifier ':' -> Label. | |||
1796 | Lex(); | |||
1797 | ||||
1798 | // Diagnose attempt to use '.' as a label. | |||
1799 | if (IDVal == ".") | |||
1800 | return Error(IDLoc, "invalid use of pseudo-symbol '.' as a label"); | |||
1801 | ||||
1802 | // Diagnose attempt to use a variable as a label. | |||
1803 | // | |||
1804 | // FIXME: Diagnostics. Note the location of the definition as a label. | |||
1805 | // FIXME: This doesn't diagnose assignment to a symbol which has been | |||
1806 | // implicitly marked as external. | |||
1807 | MCSymbol *Sym; | |||
1808 | if (LocalLabelVal == -1) { | |||
1809 | if (ParsingInlineAsm && SI) { | |||
1810 | StringRef RewrittenLabel = | |||
1811 | SI->LookupInlineAsmLabel(IDVal, getSourceManager(), IDLoc, true); | |||
1812 | 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-9~svn362543/lib/MC/MCParser/AsmParser.cpp" , 1813, __PRETTY_FUNCTION__)) | |||
1813 | "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-9~svn362543/lib/MC/MCParser/AsmParser.cpp" , 1813, __PRETTY_FUNCTION__)); | |||
1814 | Info.AsmRewrites->emplace_back(AOK_Label, IDLoc, IDVal.size(), | |||
1815 | RewrittenLabel); | |||
1816 | IDVal = RewrittenLabel; | |||
1817 | } | |||
1818 | Sym = getContext().getOrCreateSymbol(IDVal); | |||
1819 | } else | |||
1820 | Sym = Ctx.createDirectionalLocalSymbol(LocalLabelVal); | |||
1821 | // End of Labels should be treated as end of line for lexing | |||
1822 | // purposes but that information is not available to the Lexer who | |||
1823 | // does not understand Labels. This may cause us to see a Hash | |||
1824 | // here instead of a preprocessor line comment. | |||
1825 | if (getTok().is(AsmToken::Hash)) { | |||
1826 | StringRef CommentStr = parseStringToEndOfStatement(); | |||
1827 | Lexer.Lex(); | |||
1828 | Lexer.UnLex(AsmToken(AsmToken::EndOfStatement, CommentStr)); | |||
1829 | } | |||
1830 | ||||
1831 | // Consume any end of statement token, if present, to avoid spurious | |||
1832 | // AddBlankLine calls(). | |||
1833 | if (getTok().is(AsmToken::EndOfStatement)) { | |||
1834 | Lex(); | |||
1835 | } | |||
1836 | ||||
1837 | getTargetParser().doBeforeLabelEmit(Sym); | |||
1838 | ||||
1839 | // Emit the label. | |||
1840 | if (!getTargetParser().isParsingInlineAsm()) | |||
1841 | Out.EmitLabel(Sym, IDLoc); | |||
1842 | ||||
1843 | // If we are generating dwarf for assembly source files then gather the | |||
1844 | // info to make a dwarf label entry for this label if needed. | |||
1845 | if (enabledGenDwarfForAssembly()) | |||
1846 | MCGenDwarfLabelEntry::Make(Sym, &getStreamer(), getSourceManager(), | |||
1847 | IDLoc); | |||
1848 | ||||
1849 | getTargetParser().onLabelParsed(Sym); | |||
1850 | ||||
1851 | return false; | |||
1852 | } | |||
1853 | ||||
1854 | case AsmToken::Equal: | |||
1855 | if (!getTargetParser().equalIsAsmAssignment()) | |||
1856 | break; | |||
1857 | // identifier '=' ... -> assignment statement | |||
1858 | Lex(); | |||
1859 | ||||
1860 | return parseAssignment(IDVal, true); | |||
1861 | ||||
1862 | default: // Normal instruction or directive. | |||
1863 | break; | |||
1864 | } | |||
1865 | ||||
1866 | // If macros are enabled, check to see if this is a macro instantiation. | |||
1867 | if (areMacrosEnabled()) | |||
1868 | if (const MCAsmMacro *M = getContext().lookupMacro(IDVal)) { | |||
1869 | return handleMacroEntry(M, IDLoc); | |||
1870 | } | |||
1871 | ||||
1872 | // Otherwise, we have a normal instruction or directive. | |||
1873 | ||||
1874 | // Directives start with "." | |||
1875 | if (IDVal.startswith(".") && IDVal != ".") { | |||
1876 | // There are several entities interested in parsing directives: | |||
1877 | // | |||
1878 | // 1. The target-specific assembly parser. Some directives are target | |||
1879 | // specific or may potentially behave differently on certain targets. | |||
1880 | // 2. Asm parser extensions. For example, platform-specific parsers | |||
1881 | // (like the ELF parser) register themselves as extensions. | |||
1882 | // 3. The generic directive parser implemented by this class. These are | |||
1883 | // all the directives that behave in a target and platform independent | |||
1884 | // manner, or at least have a default behavior that's shared between | |||
1885 | // all targets and platforms. | |||
1886 | ||||
1887 | getTargetParser().flushPendingInstructions(getStreamer()); | |||
1888 | ||||
1889 | SMLoc StartTokLoc = getTok().getLoc(); | |||
1890 | bool TPDirectiveReturn = getTargetParser().ParseDirective(ID); | |||
1891 | ||||
1892 | if (hasPendingError()) | |||
1893 | return true; | |||
1894 | // Currently the return value should be true if we are | |||
1895 | // uninterested but as this is at odds with the standard parsing | |||
1896 | // convention (return true = error) we have instances of a parsed | |||
1897 | // directive that fails returning true as an error. Catch these | |||
1898 | // cases as best as possible errors here. | |||
1899 | if (TPDirectiveReturn && StartTokLoc != getTok().getLoc()) | |||
1900 | return true; | |||
1901 | // Return if we did some parsing or believe we succeeded. | |||
1902 | if (!TPDirectiveReturn || StartTokLoc != getTok().getLoc()) | |||
1903 | return false; | |||
1904 | ||||
1905 | // Next, check the extension directive map to see if any extension has | |||
1906 | // registered itself to parse this directive. | |||
1907 | std::pair<MCAsmParserExtension *, DirectiveHandler> Handler = | |||
1908 | ExtensionDirectiveMap.lookup(IDVal); | |||
1909 | if (Handler.first) | |||
1910 | return (*Handler.second)(Handler.first, IDVal, IDLoc); | |||
1911 | ||||
1912 | // Finally, if no one else is interested in this directive, it must be | |||
1913 | // generic and familiar to this class. | |||
1914 | switch (DirKind) { | |||
1915 | default: | |||
1916 | break; | |||
1917 | case DK_SET: | |||
1918 | case DK_EQU: | |||
1919 | return parseDirectiveSet(IDVal, true); | |||
1920 | case DK_EQUIV: | |||
1921 | return parseDirectiveSet(IDVal, false); | |||
1922 | case DK_ASCII: | |||
1923 | return parseDirectiveAscii(IDVal, false); | |||
1924 | case DK_ASCIZ: | |||
1925 | case DK_STRING: | |||
1926 | return parseDirectiveAscii(IDVal, true); | |||
1927 | case DK_BYTE: | |||
1928 | case DK_DC_B: | |||
1929 | return parseDirectiveValue(IDVal, 1); | |||
1930 | case DK_DC: | |||
1931 | case DK_DC_W: | |||
1932 | case DK_SHORT: | |||
1933 | case DK_VALUE: | |||
1934 | case DK_2BYTE: | |||
1935 | return parseDirectiveValue(IDVal, 2); | |||
1936 | case DK_LONG: | |||
1937 | case DK_INT: | |||
1938 | case DK_4BYTE: | |||
1939 | case DK_DC_L: | |||
1940 | return parseDirectiveValue(IDVal, 4); | |||
1941 | case DK_QUAD: | |||
1942 | case DK_8BYTE: | |||
1943 | return parseDirectiveValue(IDVal, 8); | |||
1944 | case DK_DC_A: | |||
1945 | return parseDirectiveValue( | |||
1946 | IDVal, getContext().getAsmInfo()->getCodePointerSize()); | |||
1947 | case DK_OCTA: | |||
1948 | return parseDirectiveOctaValue(IDVal); | |||
1949 | case DK_SINGLE: | |||
1950 | case DK_FLOAT: | |||
1951 | case DK_DC_S: | |||
1952 | return parseDirectiveRealValue(IDVal, APFloat::IEEEsingle()); | |||
1953 | case DK_DOUBLE: | |||
1954 | case DK_DC_D: | |||
1955 | return parseDirectiveRealValue(IDVal, APFloat::IEEEdouble()); | |||
1956 | case DK_ALIGN: { | |||
1957 | bool IsPow2 = !getContext().getAsmInfo()->getAlignmentIsInBytes(); | |||
1958 | return parseDirectiveAlign(IsPow2, /*ExprSize=*/1); | |||
1959 | } | |||
1960 | case DK_ALIGN32: { | |||
1961 | bool IsPow2 = !getContext().getAsmInfo()->getAlignmentIsInBytes(); | |||
1962 | return parseDirectiveAlign(IsPow2, /*ExprSize=*/4); | |||
1963 | } | |||
1964 | case DK_BALIGN: | |||
1965 | return parseDirectiveAlign(/*IsPow2=*/false, /*ExprSize=*/1); | |||
1966 | case DK_BALIGNW: | |||
1967 | return parseDirectiveAlign(/*IsPow2=*/false, /*ExprSize=*/2); | |||
1968 | case DK_BALIGNL: | |||
1969 | return parseDirectiveAlign(/*IsPow2=*/false, /*ExprSize=*/4); | |||
1970 | case DK_P2ALIGN: | |||
1971 | return parseDirectiveAlign(/*IsPow2=*/true, /*ExprSize=*/1); | |||
1972 | case DK_P2ALIGNW: | |||
1973 | return parseDirectiveAlign(/*IsPow2=*/true, /*ExprSize=*/2); | |||
1974 | case DK_P2ALIGNL: | |||
1975 | return parseDirectiveAlign(/*IsPow2=*/true, /*ExprSize=*/4); | |||
1976 | case DK_ORG: | |||
1977 | return parseDirectiveOrg(); | |||
1978 | case DK_FILL: | |||
1979 | return parseDirectiveFill(); | |||
1980 | case DK_ZERO: | |||
1981 | return parseDirectiveZero(); | |||
1982 | case DK_EXTERN: | |||
1983 | eatToEndOfStatement(); // .extern is the default, ignore it. | |||
1984 | return false; | |||
1985 | case DK_GLOBL: | |||
1986 | case DK_GLOBAL: | |||
1987 | return parseDirectiveSymbolAttribute(MCSA_Global); | |||
1988 | case DK_LAZY_REFERENCE: | |||
1989 | return parseDirectiveSymbolAttribute(MCSA_LazyReference); | |||
1990 | case DK_NO_DEAD_STRIP: | |||
1991 | return parseDirectiveSymbolAttribute(MCSA_NoDeadStrip); | |||
1992 | case DK_SYMBOL_RESOLVER: | |||
1993 | return parseDirectiveSymbolAttribute(MCSA_SymbolResolver); | |||
1994 | case DK_PRIVATE_EXTERN: | |||
1995 | return parseDirectiveSymbolAttribute(MCSA_PrivateExtern); | |||
1996 | case DK_REFERENCE: | |||
1997 | return parseDirectiveSymbolAttribute(MCSA_Reference); | |||
1998 | case DK_WEAK_DEFINITION: | |||
1999 | return parseDirectiveSymbolAttribute(MCSA_WeakDefinition); | |||
2000 | case DK_WEAK_REFERENCE: | |||
2001 | return parseDirectiveSymbolAttribute(MCSA_WeakReference); | |||
2002 | case DK_WEAK_DEF_CAN_BE_HIDDEN: | |||
2003 | return parseDirectiveSymbolAttribute(MCSA_WeakDefAutoPrivate); | |||
2004 | case DK_COLD: | |||
2005 | return parseDirectiveSymbolAttribute(MCSA_Cold); | |||
2006 | case DK_COMM: | |||
2007 | case DK_COMMON: | |||
2008 | return parseDirectiveComm(/*IsLocal=*/false); | |||
2009 | case DK_LCOMM: | |||
2010 | return parseDirectiveComm(/*IsLocal=*/true); | |||
2011 | case DK_ABORT: | |||
2012 | return parseDirectiveAbort(); | |||
2013 | case DK_INCLUDE: | |||
2014 | return parseDirectiveInclude(); | |||
2015 | case DK_INCBIN: | |||
2016 | return parseDirectiveIncbin(); | |||
2017 | case DK_CODE16: | |||
2018 | case DK_CODE16GCC: | |||
2019 | return TokError(Twine(IDVal) + | |||
2020 | " not currently supported for this target"); | |||
2021 | case DK_REPT: | |||
2022 | return parseDirectiveRept(IDLoc, IDVal); | |||
2023 | case DK_IRP: | |||
2024 | return parseDirectiveIrp(IDLoc); | |||
2025 | case DK_IRPC: | |||
2026 | return parseDirectiveIrpc(IDLoc); | |||
2027 | case DK_ENDR: | |||
2028 | return parseDirectiveEndr(IDLoc); | |||
2029 | case DK_BUNDLE_ALIGN_MODE: | |||
2030 | return parseDirectiveBundleAlignMode(); | |||
2031 | case DK_BUNDLE_LOCK: | |||
2032 | return parseDirectiveBundleLock(); | |||
2033 | case DK_BUNDLE_UNLOCK: | |||
2034 | return parseDirectiveBundleUnlock(); | |||
2035 | case DK_SLEB128: | |||
2036 | return parseDirectiveLEB128(true); | |||
2037 | case DK_ULEB128: | |||
2038 | return parseDirectiveLEB128(false); | |||
2039 | case DK_SPACE: | |||
2040 | case DK_SKIP: | |||
2041 | return parseDirectiveSpace(IDVal); | |||
2042 | case DK_FILE: | |||
2043 | return parseDirectiveFile(IDLoc); | |||
2044 | case DK_LINE: | |||
2045 | return parseDirectiveLine(); | |||
2046 | case DK_LOC: | |||
2047 | return parseDirectiveLoc(); | |||
2048 | case DK_STABS: | |||
2049 | return parseDirectiveStabs(); | |||
2050 | case DK_CV_FILE: | |||
2051 | return parseDirectiveCVFile(); | |||
2052 | case DK_CV_FUNC_ID: | |||
2053 | return parseDirectiveCVFuncId(); | |||
2054 | case DK_CV_INLINE_SITE_ID: | |||
2055 | return parseDirectiveCVInlineSiteId(); | |||
2056 | case DK_CV_LOC: | |||
2057 | return parseDirectiveCVLoc(); | |||
2058 | case DK_CV_LINETABLE: | |||
2059 | return parseDirectiveCVLinetable(); | |||
2060 | case DK_CV_INLINE_LINETABLE: | |||
2061 | return parseDirectiveCVInlineLinetable(); | |||
2062 | case DK_CV_DEF_RANGE: | |||
2063 | return parseDirectiveCVDefRange(); | |||
2064 | case DK_CV_STRING: | |||
2065 | return parseDirectiveCVString(); | |||
2066 | case DK_CV_STRINGTABLE: | |||
2067 | return parseDirectiveCVStringTable(); | |||
2068 | case DK_CV_FILECHECKSUMS: | |||
2069 | return parseDirectiveCVFileChecksums(); | |||
2070 | case DK_CV_FILECHECKSUM_OFFSET: | |||
2071 | return parseDirectiveCVFileChecksumOffset(); | |||
2072 | case DK_CV_FPO_DATA: | |||
2073 | return parseDirectiveCVFPOData(); | |||
2074 | case DK_CFI_SECTIONS: | |||
2075 | return parseDirectiveCFISections(); | |||
2076 | case DK_CFI_STARTPROC: | |||
2077 | return parseDirectiveCFIStartProc(); | |||
2078 | case DK_CFI_ENDPROC: | |||
2079 | return parseDirectiveCFIEndProc(); | |||
2080 | case DK_CFI_DEF_CFA: | |||
2081 | return parseDirectiveCFIDefCfa(IDLoc); | |||
2082 | case DK_CFI_DEF_CFA_OFFSET: | |||
2083 | return parseDirectiveCFIDefCfaOffset(); | |||
2084 | case DK_CFI_ADJUST_CFA_OFFSET: | |||
2085 | return parseDirectiveCFIAdjustCfaOffset(); | |||
2086 | case DK_CFI_DEF_CFA_REGISTER: | |||
2087 | return parseDirectiveCFIDefCfaRegister(IDLoc); | |||
2088 | case DK_CFI_OFFSET: | |||
2089 | return parseDirectiveCFIOffset(IDLoc); | |||
2090 | case DK_CFI_REL_OFFSET: | |||
2091 | return parseDirectiveCFIRelOffset(IDLoc); | |||
2092 | case DK_CFI_PERSONALITY: | |||
2093 | return parseDirectiveCFIPersonalityOrLsda(true); | |||
2094 | case DK_CFI_LSDA: | |||
2095 | return parseDirectiveCFIPersonalityOrLsda(false); | |||
2096 | case DK_CFI_REMEMBER_STATE: | |||
2097 | return parseDirectiveCFIRememberState(); | |||
2098 | case DK_CFI_RESTORE_STATE: | |||
2099 | return parseDirectiveCFIRestoreState(); | |||
2100 | case DK_CFI_SAME_VALUE: | |||
2101 | return parseDirectiveCFISameValue(IDLoc); | |||
2102 | case DK_CFI_RESTORE: | |||
2103 | return parseDirectiveCFIRestore(IDLoc); | |||
2104 | case DK_CFI_ESCAPE: | |||
2105 | return parseDirectiveCFIEscape(); | |||
2106 | case DK_CFI_RETURN_COLUMN: | |||
2107 | return parseDirectiveCFIReturnColumn(IDLoc); | |||
2108 | case DK_CFI_SIGNAL_FRAME: | |||
2109 | return parseDirectiveCFISignalFrame(); | |||
2110 | case DK_CFI_UNDEFINED: | |||
2111 | return parseDirectiveCFIUndefined(IDLoc); | |||
2112 | case DK_CFI_REGISTER: | |||
2113 | return parseDirectiveCFIRegister(IDLoc); | |||
2114 | case DK_CFI_WINDOW_SAVE: | |||
2115 | return parseDirectiveCFIWindowSave(); | |||
2116 | case DK_MACROS_ON: | |||
2117 | case DK_MACROS_OFF: | |||
2118 | return parseDirectiveMacrosOnOff(IDVal); | |||
2119 | case DK_MACRO: | |||
2120 | return parseDirectiveMacro(IDLoc); | |||
2121 | case DK_ALTMACRO: | |||
2122 | case DK_NOALTMACRO: | |||
2123 | return parseDirectiveAltmacro(IDVal); | |||
2124 | case DK_EXITM: | |||
2125 | return parseDirectiveExitMacro(IDVal); | |||
2126 | case DK_ENDM: | |||
2127 | case DK_ENDMACRO: | |||
2128 | return parseDirectiveEndMacro(IDVal); | |||
2129 | case DK_PURGEM: | |||
2130 | return parseDirectivePurgeMacro(IDLoc); | |||
2131 | case DK_END: | |||
2132 | return parseDirectiveEnd(IDLoc); | |||
2133 | case DK_ERR: | |||
2134 | return parseDirectiveError(IDLoc, false); | |||
2135 | case DK_ERROR: | |||
2136 | return parseDirectiveError(IDLoc, true); | |||
2137 | case DK_WARNING: | |||
2138 | return parseDirectiveWarning(IDLoc); | |||
2139 | case DK_RELOC: | |||
2140 | return parseDirectiveReloc(IDLoc); | |||
2141 | case DK_DCB: | |||
2142 | case DK_DCB_W: | |||
2143 | return parseDirectiveDCB(IDVal, 2); | |||
2144 | case DK_DCB_B: | |||
2145 | return parseDirectiveDCB(IDVal, 1); | |||
2146 | case DK_DCB_D: | |||
2147 | return parseDirectiveRealDCB(IDVal, APFloat::IEEEdouble()); | |||
2148 | case DK_DCB_L: | |||
2149 | return parseDirectiveDCB(IDVal, 4); | |||
2150 | case DK_DCB_S: | |||
2151 | return parseDirectiveRealDCB(IDVal, APFloat::IEEEsingle()); | |||
2152 | case DK_DC_X: | |||
2153 | case DK_DCB_X: | |||
2154 | return TokError(Twine(IDVal) + | |||
2155 | " not currently supported for this target"); | |||
2156 | case DK_DS: | |||
2157 | case DK_DS_W: | |||
2158 | return parseDirectiveDS(IDVal, 2); | |||
2159 | case DK_DS_B: | |||
2160 | return parseDirectiveDS(IDVal, 1); | |||
2161 | case DK_DS_D: | |||
2162 | return parseDirectiveDS(IDVal, 8); | |||
2163 | case DK_DS_L: | |||
2164 | case DK_DS_S: | |||
2165 | return parseDirectiveDS(IDVal, 4); | |||
2166 | case DK_DS_P: | |||
2167 | case DK_DS_X: | |||
2168 | return parseDirectiveDS(IDVal, 12); | |||
2169 | case DK_PRINT: | |||
2170 | return parseDirectivePrint(IDLoc); | |||
2171 | case DK_ADDRSIG: | |||
2172 | return parseDirectiveAddrsig(); | |||
2173 | case DK_ADDRSIG_SYM: | |||
2174 | return parseDirectiveAddrsigSym(); | |||
2175 | } | |||
2176 | ||||
2177 | return Error(IDLoc, "unknown directive"); | |||
2178 | } | |||
2179 | ||||
2180 | // __asm _emit or __asm __emit | |||
2181 | if (ParsingInlineAsm && (IDVal == "_emit" || IDVal == "__emit" || | |||
2182 | IDVal == "_EMIT" || IDVal == "__EMIT")) | |||
2183 | return parseDirectiveMSEmit(IDLoc, Info, IDVal.size()); | |||
2184 | ||||
2185 | // __asm align | |||
2186 | if (ParsingInlineAsm && (IDVal == "align" || IDVal == "ALIGN")) | |||
2187 | return parseDirectiveMSAlign(IDLoc, Info); | |||
2188 | ||||
2189 | if (ParsingInlineAsm && (IDVal == "even" || IDVal == "EVEN")) | |||
2190 | Info.AsmRewrites->emplace_back(AOK_EVEN, IDLoc, 4); | |||
2191 | if (checkForValidSection()) | |||
2192 | return true; | |||
2193 | ||||
2194 | // Canonicalize the opcode to lower case. | |||
2195 | std::string OpcodeStr = IDVal.lower(); | |||
2196 | ParseInstructionInfo IInfo(Info.AsmRewrites); | |||
2197 | bool ParseHadError = getTargetParser().ParseInstruction(IInfo, OpcodeStr, ID, | |||
2198 | Info.ParsedOperands); | |||
2199 | Info.ParseError = ParseHadError; | |||
2200 | ||||
2201 | // Dump the parsed representation, if requested. | |||
2202 | if (getShowParsedOperands()) { | |||
2203 | SmallString<256> Str; | |||
2204 | raw_svector_ostream OS(Str); | |||
2205 | OS << "parsed instruction: ["; | |||
2206 | for (unsigned i = 0; i != Info.ParsedOperands.size(); ++i) { | |||
2207 | if (i != 0) | |||
2208 | OS << ", "; | |||
2209 | Info.ParsedOperands[i]->print(OS); | |||
2210 | } | |||
2211 | OS << "]"; | |||
2212 | ||||
2213 | printMessage(IDLoc, SourceMgr::DK_Note, OS.str()); | |||
2214 | } | |||
2215 | ||||
2216 | // Fail even if ParseInstruction erroneously returns false. | |||
2217 | if (hasPendingError() || ParseHadError) | |||
2218 | return true; | |||
2219 | ||||
2220 | // If we are generating dwarf for the current section then generate a .loc | |||
2221 | // directive for the instruction. | |||
2222 | if (!ParseHadError && enabledGenDwarfForAssembly() && | |||
2223 | getContext().getGenDwarfSectionSyms().count( | |||
2224 | getStreamer().getCurrentSectionOnly())) { | |||
2225 | unsigned Line; | |||
2226 | if (ActiveMacros.empty()) | |||
2227 | Line = SrcMgr.FindLineNumber(IDLoc, CurBuffer); | |||
2228 | else | |||
2229 | Line = SrcMgr.FindLineNumber(ActiveMacros.front()->InstantiationLoc, | |||
2230 | ActiveMacros.front()->ExitBuffer); | |||
2231 | ||||
2232 | // If we previously parsed a cpp hash file line comment then make sure the | |||
2233 | // current Dwarf File is for the CppHashFilename if not then emit the | |||
2234 | // Dwarf File table for it and adjust the line number for the .loc. | |||
2235 | if (!CppHashInfo.Filename.empty()) { | |||
2236 | unsigned FileNumber = getStreamer().EmitDwarfFileDirective( | |||
2237 | 0, StringRef(), CppHashInfo.Filename); | |||
2238 | getContext().setGenDwarfFileNumber(FileNumber); | |||
2239 | ||||
2240 | unsigned CppHashLocLineNo = | |||
2241 | SrcMgr.FindLineNumber(CppHashInfo.Loc, CppHashInfo.Buf); | |||
2242 | Line = CppHashInfo.LineNumber - 1 + (Line - CppHashLocLineNo); | |||
2243 | } | |||
2244 | ||||
2245 | getStreamer().EmitDwarfLocDirective( | |||
2246 | getContext().getGenDwarfFileNumber(), Line, 0, | |||
2247 | DWARF2_LINE_DEFAULT_IS_STMT1 ? DWARF2_FLAG_IS_STMT(1 << 0) : 0, 0, 0, | |||
2248 | StringRef()); | |||
2249 | } | |||
2250 | ||||
2251 | // If parsing succeeded, match the instruction. | |||
2252 | if (!ParseHadError) { | |||
2253 | uint64_t ErrorInfo; | |||
2254 | if (getTargetParser().MatchAndEmitInstruction( | |||
2255 | IDLoc, Info.Opcode, Info.ParsedOperands, Out, ErrorInfo, | |||
2256 | getTargetParser().isParsingInlineAsm())) | |||
2257 | return true; | |||
2258 | } | |||
2259 | return false; | |||
2260 | } | |||
2261 | ||||
2262 | // Parse and erase curly braces marking block start/end | |||
2263 | bool | |||
2264 | AsmParser::parseCurlyBlockScope(SmallVectorImpl<AsmRewrite> &AsmStrRewrites) { | |||
2265 | // Identify curly brace marking block start/end | |||
2266 | if (Lexer.isNot(AsmToken::LCurly) && Lexer.isNot(AsmToken::RCurly)) | |||
2267 | return false; | |||
2268 | ||||
2269 | SMLoc StartLoc = Lexer.getLoc(); | |||
2270 | Lex(); // Eat the brace | |||
2271 | if (Lexer.is(AsmToken::EndOfStatement)) | |||
2272 | Lex(); // Eat EndOfStatement following the brace | |||
2273 | ||||
2274 | // Erase the block start/end brace from the output asm string | |||
2275 | AsmStrRewrites.emplace_back(AOK_Skip, StartLoc, Lexer.getLoc().getPointer() - | |||
2276 | StartLoc.getPointer()); | |||
2277 | return true; | |||
2278 | } | |||
2279 | ||||
2280 | /// parseCppHashLineFilenameComment as this: | |||
2281 | /// ::= # number "filename" | |||
2282 | bool AsmParser::parseCppHashLineFilenameComment(SMLoc L) { | |||
2283 | Lex(); // Eat the hash token. | |||
2284 | // Lexer only ever emits HashDirective if it fully formed if it's | |||
2285 | // done the checking already so this is an internal error. | |||
2286 | 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-9~svn362543/lib/MC/MCParser/AsmParser.cpp" , 2287, __PRETTY_FUNCTION__)) | |||
2287 | "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-9~svn362543/lib/MC/MCParser/AsmParser.cpp" , 2287, __PRETTY_FUNCTION__)); | |||
2288 | int64_t LineNumber = getTok().getIntVal(); | |||
2289 | Lex(); | |||
2290 | 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-9~svn362543/lib/MC/MCParser/AsmParser.cpp" , 2291, __PRETTY_FUNCTION__)) | |||
2291 | "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-9~svn362543/lib/MC/MCParser/AsmParser.cpp" , 2291, __PRETTY_FUNCTION__)); | |||
2292 | StringRef Filename = getTok().getString(); | |||
2293 | Lex(); | |||
2294 | ||||
2295 | // Get rid of the enclosing quotes. | |||
2296 | Filename = Filename.substr(1, Filename.size() - 2); | |||
2297 | ||||
2298 | // Save the SMLoc, Filename and LineNumber for later use by diagnostics | |||
2299 | // and possibly DWARF file info. | |||
2300 | CppHashInfo.Loc = L; | |||
2301 | CppHashInfo.Filename = Filename; | |||
2302 | CppHashInfo.LineNumber = LineNumber; | |||
2303 | CppHashInfo.Buf = CurBuffer; | |||
2304 | if (FirstCppHashFilename.empty()) | |||
2305 | FirstCppHashFilename = Filename; | |||
2306 | return false; | |||
2307 | } | |||
2308 | ||||
2309 | /// will use the last parsed cpp hash line filename comment | |||
2310 | /// for the Filename and LineNo if any in the diagnostic. | |||
2311 | void AsmParser::DiagHandler(const SMDiagnostic &Diag, void *Context) { | |||
2312 | const AsmParser *Parser = static_cast<const AsmParser *>(Context); | |||
2313 | raw_ostream &OS = errs(); | |||
2314 | ||||
2315 | const SourceMgr &DiagSrcMgr = *Diag.getSourceMgr(); | |||
2316 | SMLoc DiagLoc = Diag.getLoc(); | |||
2317 | unsigned DiagBuf = DiagSrcMgr.FindBufferContainingLoc(DiagLoc); | |||
2318 | unsigned CppHashBuf = | |||
2319 | Parser->SrcMgr.FindBufferContainingLoc(Parser->CppHashInfo.Loc); | |||
2320 | ||||
2321 | // Like SourceMgr::printMessage() we need to print the include stack if any | |||
2322 | // before printing the message. | |||
2323 | unsigned DiagCurBuffer = DiagSrcMgr.FindBufferContainingLoc(DiagLoc); | |||
2324 | if (!Parser->SavedDiagHandler && DiagCurBuffer && | |||
2325 | DiagCurBuffer != DiagSrcMgr.getMainFileID()) { | |||
2326 | SMLoc ParentIncludeLoc = DiagSrcMgr.getParentIncludeLoc(DiagCurBuffer); | |||
2327 | DiagSrcMgr.PrintIncludeStack(ParentIncludeLoc, OS); | |||
2328 | } | |||
2329 | ||||
2330 | // If we have not parsed a cpp hash line filename comment or the source | |||
2331 | // manager changed or buffer changed (like in a nested include) then just | |||
2332 | // print the normal diagnostic using its Filename and LineNo. | |||
2333 | if (!Parser->CppHashInfo.LineNumber || &DiagSrcMgr != &Parser->SrcMgr || | |||
2334 | DiagBuf != CppHashBuf) { | |||
2335 | if (Parser->SavedDiagHandler) | |||
2336 | Parser->SavedDiagHandler(Diag, Parser->SavedDiagContext); | |||
2337 | else | |||
2338 | Diag.print(nullptr, OS); | |||
2339 | return; | |||
2340 | } | |||
2341 | ||||
2342 | // Use the CppHashFilename and calculate a line number based on the | |||
2343 | // CppHashInfo.Loc and CppHashInfo.LineNumber relative to this Diag's SMLoc | |||
2344 | // for the diagnostic. | |||
2345 | const std::string &Filename = Parser->CppHashInfo.Filename; | |||
2346 | ||||
2347 | int DiagLocLineNo = DiagSrcMgr.FindLineNumber(DiagLoc, DiagBuf); | |||
2348 | int CppHashLocLineNo = | |||
2349 | Parser->SrcMgr.FindLineNumber(Parser->CppHashInfo.Loc, CppHashBuf); | |||
2350 | int LineNo = | |||
2351 | Parser->CppHashInfo.LineNumber - 1 + (DiagLocLineNo - CppHashLocLineNo); | |||
2352 | ||||
2353 | SMDiagnostic NewDiag(*Diag.getSourceMgr(), Diag.getLoc(), Filename, LineNo, | |||
2354 | Diag.getColumnNo(), Diag.getKind(), Diag.getMessage(), | |||
2355 | Diag.getLineContents(), Diag.getRanges()); | |||
2356 | ||||
2357 | if (Parser->SavedDiagHandler) | |||
2358 | Parser->SavedDiagHandler(NewDiag, Parser->SavedDiagContext); | |||
2359 | else | |||
2360 | NewDiag.print(nullptr, OS); | |||
2361 | } | |||
2362 | ||||
2363 | // FIXME: This is mostly duplicated from the function in AsmLexer.cpp. The | |||
2364 | // difference being that that function accepts '@' as part of identifiers and | |||
2365 | // we can't do that. AsmLexer.cpp should probably be changed to handle | |||
2366 | // '@' as a special case when needed. | |||
2367 | static bool isIdentifierChar(char c) { | |||
2368 | return isalnum(static_cast<unsigned char>(c)) || c == '_' || c == '$' || | |||
2369 | c == '.'; | |||
2370 | } | |||
2371 | ||||
2372 | bool AsmParser::expandMacro(raw_svector_ostream &OS, StringRef Body, | |||
2373 | ArrayRef<MCAsmMacroParameter> Parameters, | |||
2374 | ArrayRef<MCAsmMacroArgument> A, | |||
2375 | bool EnableAtPseudoVariable, SMLoc L) { | |||
2376 | unsigned NParameters = Parameters.size(); | |||
2377 | bool HasVararg = NParameters ? Parameters.back().Vararg : false; | |||
2378 | if ((!IsDarwin || NParameters != 0) && NParameters != A.size()) | |||
2379 | return Error(L, "Wrong number of arguments"); | |||
2380 | ||||
2381 | // A macro without parameters is handled differently on Darwin: | |||
2382 | // gas accepts no arguments and does no substitutions | |||
2383 | while (!Body.empty()) { | |||
2384 | // Scan for the next substitution. | |||
2385 | std::size_t End = Body.size(), Pos = 0; | |||
2386 | for (; Pos != End; ++Pos) { | |||
2387 | // Check for a substitution or escape. | |||
2388 | if (IsDarwin && !NParameters) { | |||
2389 | // This macro has no parameters, look for $0, $1, etc. | |||
2390 | if (Body[Pos] != '$' || Pos + 1 == End) | |||
2391 | continue; | |||
2392 | ||||
2393 | char Next = Body[Pos + 1]; | |||
2394 | if (Next == '$' || Next == 'n' || | |||
2395 | isdigit(static_cast<unsigned char>(Next))) | |||
2396 | break; | |||
2397 | } else { | |||
2398 | // This macro has parameters, look for \foo, \bar, etc. | |||
2399 | if (Body[Pos] == '\\' && Pos + 1 != End) | |||
2400 | break; | |||
2401 | } | |||
2402 | } | |||
2403 | ||||
2404 | // Add the prefix. | |||
2405 | OS << Body.slice(0, Pos); | |||
2406 | ||||
2407 | // Check if we reached the end. | |||
2408 | if (Pos == End) | |||
2409 | break; | |||
2410 | ||||
2411 | if (IsDarwin && !NParameters) { | |||
2412 | switch (Body[Pos + 1]) { | |||
2413 | // $$ => $ | |||
2414 | case '$': | |||
2415 | OS << '$'; | |||
2416 | break; | |||
2417 | ||||
2418 | // $n => number of arguments | |||
2419 | case 'n': | |||
2420 | OS << A.size(); | |||
2421 | break; | |||
2422 | ||||
2423 | // $[0-9] => argument | |||
2424 | default: { | |||
2425 | // Missing arguments are ignored. | |||
2426 | unsigned Index = Body[Pos + 1] - '0'; | |||
2427 | if (Index >= A.size()) | |||
2428 | break; | |||
2429 | ||||
2430 | // Otherwise substitute with the token values, with spaces eliminated. | |||
2431 | for (const AsmToken &Token : A[Index]) | |||
2432 | OS << Token.getString(); | |||
2433 | break; | |||
2434 | } | |||
2435 | } | |||
2436 | Pos += 2; | |||
2437 | } else { | |||
2438 | unsigned I = Pos + 1; | |||
2439 | ||||
2440 | // Check for the \@ pseudo-variable. | |||
2441 | if (EnableAtPseudoVariable && Body[I] == '@' && I + 1 != End) | |||
2442 | ++I; | |||
2443 | else | |||
2444 | while (isIdentifierChar(Body[I]) && I + 1 != End) | |||
2445 | ++I; | |||
2446 | ||||
2447 | const char *Begin = Body.data() + Pos + 1; | |||
2448 | StringRef Argument(Begin, I - (Pos + 1)); | |||
2449 | unsigned Index = 0; | |||
2450 | ||||
2451 | if (Argument == "@") { | |||
2452 | OS << NumOfMacroInstantiations; | |||
2453 | Pos += 2; | |||
2454 | } else { | |||
2455 | for (; Index < NParameters; ++Index) | |||
2456 | if (Parameters[Index].Name == Argument) | |||
2457 | break; | |||
2458 | ||||
2459 | if (Index == NParameters) { | |||
2460 | if (Body[Pos + 1] == '(' && Body[Pos + 2] == ')') | |||
2461 | Pos += 3; | |||
2462 | else { | |||
2463 | OS << '\\' << Argument; | |||
2464 | Pos = I; | |||
2465 | } | |||
2466 | } else { | |||
2467 | bool VarargParameter = HasVararg && Index == (NParameters - 1); | |||
2468 | for (const AsmToken &Token : A[Index]) | |||
2469 | // For altmacro mode, you can write '%expr'. | |||
2470 | // The prefix '%' evaluates the expression 'expr' | |||
2471 | // and uses the result as a string (e.g. replace %(1+2) with the | |||
2472 | // string "3"). | |||
2473 | // Here, we identify the integer token which is the result of the | |||
2474 | // absolute expression evaluation and replace it with its string | |||
2475 | // representation. | |||
2476 | if (AltMacroMode && Token.getString().front() == '%' && | |||
2477 | Token.is(AsmToken::Integer)) | |||
2478 | // Emit an integer value to the buffer. | |||
2479 | OS << Token.getIntVal(); | |||
2480 | // Only Token that was validated as a string and begins with '<' | |||
2481 | // is considered altMacroString!!! | |||
2482 | else if (AltMacroMode && Token.getString().front() == '<' && | |||
2483 | Token.is(AsmToken::String)) { | |||
2484 | OS << altMacroString(Token.getStringContents()); | |||
2485 | } | |||
2486 | // We expect no quotes around the string's contents when | |||
2487 | // parsing for varargs. | |||
2488 | else if (Token.isNot(AsmToken::String) || VarargParameter) | |||
2489 | OS << Token.getString(); | |||
2490 | else | |||
2491 | OS << Token.getStringContents(); | |||
2492 | ||||
2493 | Pos += 1 + Argument.size(); | |||
2494 | } | |||
2495 | } | |||
2496 | } | |||
2497 | // Update the scan point. | |||
2498 | Body = Body.substr(Pos); | |||
2499 | } | |||
2500 | ||||
2501 | return false; | |||
2502 | } | |||
2503 | ||||
2504 | MacroInstantiation::MacroInstantiation(SMLoc IL, int EB, SMLoc EL, | |||
2505 | size_t CondStackDepth) | |||
2506 | : InstantiationLoc(IL), ExitBuffer(EB), ExitLoc(EL), | |||
2507 | CondStackDepth(CondStackDepth) {} | |||
2508 | ||||
2509 | static bool isOperator(AsmToken::TokenKind kind) { | |||
2510 | switch (kind) { | |||
2511 | default: | |||
2512 | return false; | |||
2513 | case AsmToken::Plus: | |||
2514 | case AsmToken::Minus: | |||
2515 | case AsmToken::Tilde: | |||
2516 | case AsmToken::Slash: | |||
2517 | case AsmToken::Star: | |||
2518 | case AsmToken::Dot: | |||
2519 | case AsmToken::Equal: | |||
2520 | case AsmToken::EqualEqual: | |||
2521 | case AsmToken::Pipe: | |||
2522 | case AsmToken::PipePipe: | |||
2523 | case AsmToken::Caret: | |||
2524 | case AsmToken::Amp: | |||
2525 | case AsmToken::AmpAmp: | |||
2526 | case AsmToken::Exclaim: | |||
2527 | case AsmToken::ExclaimEqual: | |||
2528 | case AsmToken::Less: | |||
2529 | case AsmToken::LessEqual: | |||
2530 | case AsmToken::LessLess: | |||
2531 | case AsmToken::LessGreater: | |||
2532 | case AsmToken::Greater: | |||
2533 | case AsmToken::GreaterEqual: | |||
2534 | case AsmToken::GreaterGreater: | |||
2535 | return true; | |||
2536 | } | |||
2537 | } | |||
2538 | ||||
2539 | namespace { | |||
2540 | ||||
2541 | class AsmLexerSkipSpaceRAII { | |||
2542 | public: | |||
2543 | AsmLexerSkipSpaceRAII(AsmLexer &Lexer, bool SkipSpace) : Lexer(Lexer) { | |||
2544 | Lexer.setSkipSpace(SkipSpace); | |||
2545 | } | |||
2546 | ||||
2547 | ~AsmLexerSkipSpaceRAII() { | |||
2548 | Lexer.setSkipSpace(true); | |||
2549 | } | |||
2550 | ||||
2551 | private: | |||
2552 | AsmLexer &Lexer; | |||
2553 | }; | |||
2554 | ||||
2555 | } // end anonymous namespace | |||
2556 | ||||
2557 | bool AsmParser::parseMacroArgument(MCAsmMacroArgument &MA, bool Vararg) { | |||
2558 | ||||
2559 | if (Vararg) { | |||
2560 | if (Lexer.isNot(AsmToken::EndOfStatement)) { | |||
2561 | StringRef Str = parseStringToEndOfStatement(); | |||
2562 | MA.emplace_back(AsmToken::String, Str); | |||
2563 | } | |||
2564 | return false; | |||
2565 | } | |||
2566 | ||||
2567 | unsigned ParenLevel = 0; | |||
2568 | ||||
2569 | // Darwin doesn't use spaces to delmit arguments. | |||
2570 | AsmLexerSkipSpaceRAII ScopedSkipSpace(Lexer, IsDarwin); | |||
2571 | ||||
2572 | bool SpaceEaten; | |||
2573 | ||||
2574 | while (true) { | |||
2575 | SpaceEaten = false; | |||
2576 | if (Lexer.is(AsmToken::Eof) || Lexer.is(AsmToken::Equal)) | |||
2577 | return TokError("unexpected token in macro instantiation"); | |||
2578 | ||||
2579 | if (ParenLevel == 0) { | |||
2580 | ||||
2581 | if (Lexer.is(AsmToken::Comma)) | |||
2582 | break; | |||
2583 | ||||
2584 | if (Lexer.is(AsmToken::Space)) { | |||
2585 | SpaceEaten = true; | |||
2586 | Lexer.Lex(); // Eat spaces | |||
2587 | } | |||
2588 | ||||
2589 | // Spaces can delimit parameters, but could also be part an expression. | |||
2590 | // If the token after a space is an operator, add the token and the next | |||
2591 | // one into this argument | |||
2592 | if (!IsDarwin) { | |||
2593 | if (isOperator(Lexer.getKind())) { | |||
2594 | MA.push_back(getTok()); | |||
2595 | Lexer.Lex(); | |||
2596 | ||||
2597 | // Whitespace after an operator can be ignored. | |||
2598 | if (Lexer.is(AsmToken::Space)) | |||
2599 | Lexer.Lex(); | |||
2600 | ||||
2601 | continue; | |||
2602 | } | |||
2603 | } | |||
2604 | if (SpaceEaten) | |||
2605 | break; | |||
2606 | } | |||
2607 | ||||
2608 | // handleMacroEntry relies on not advancing the lexer here | |||
2609 | // to be able to fill in the remaining default parameter values | |||
2610 | if (Lexer.is(AsmToken::EndOfStatement)) | |||
2611 | break; | |||
2612 | ||||
2613 | // Adjust the current parentheses level. | |||
2614 | if (Lexer.is(AsmToken::LParen)) | |||
2615 | ++ParenLevel; | |||
2616 | else if (Lexer.is(AsmToken::RParen) && ParenLevel) | |||
2617 | --ParenLevel; | |||
2618 | ||||
2619 | // Append the token to the current argument list. | |||
2620 | MA.push_back(getTok()); | |||
2621 | Lexer.Lex(); | |||
2622 | } | |||
2623 | ||||
2624 | if (ParenLevel != 0) | |||
2625 | return TokError("unbalanced parentheses in macro argument"); | |||
2626 | return false; | |||
2627 | } | |||
2628 | ||||
2629 | // Parse the macro instantiation arguments. | |||
2630 | bool AsmParser::parseMacroArguments(const MCAsmMacro *M, | |||
2631 | MCAsmMacroArguments &A) { | |||
2632 | const unsigned NParameters = M ? M->Parameters.size() : 0; | |||
2633 | bool NamedParametersFound = false; | |||
2634 | SmallVector<SMLoc, 4> FALocs; | |||
2635 | ||||
2636 | A.resize(NParameters); | |||
2637 | FALocs.resize(NParameters); | |||
2638 | ||||
2639 | // Parse two kinds of macro invocations: | |||
2640 | // - macros defined without any parameters accept an arbitrary number of them | |||
2641 | // - macros defined with parameters accept at most that many of them | |||
2642 | bool HasVararg = NParameters ? M->Parameters.back().Vararg : false; | |||
2643 | for (unsigned Parameter = 0; !NParameters || Parameter < NParameters; | |||
2644 | ++Parameter) { | |||
2645 | SMLoc IDLoc = Lexer.getLoc(); | |||
2646 | MCAsmMacroParameter FA; | |||
2647 | ||||
2648 | if (Lexer.is(AsmToken::Identifier) && Lexer.peekTok().is(AsmToken::Equal)) { | |||
2649 | if (parseIdentifier(FA.Name)) | |||
2650 | return Error(IDLoc, "invalid argument identifier for formal argument"); | |||
2651 | ||||
2652 | if (Lexer.isNot(AsmToken::Equal)) | |||
2653 | return TokError("expected '=' after formal parameter identifier"); | |||
2654 | ||||
2655 | Lex(); | |||
2656 | ||||
2657 | NamedParametersFound = true; | |||
2658 | } | |||
2659 | bool Vararg = HasVararg && Parameter == (NParameters - 1); | |||
2660 | ||||
2661 | if (NamedParametersFound && FA.Name.empty()) | |||
2662 | return Error(IDLoc, "cannot mix positional and keyword arguments"); | |||
2663 | ||||
2664 | SMLoc StrLoc = Lexer.getLoc(); | |||
2665 | SMLoc EndLoc; | |||
2666 | if (AltMacroMode && Lexer.is(AsmToken::Percent)) { | |||
2667 | const MCExpr *AbsoluteExp; | |||
2668 | int64_t Value; | |||
2669 | /// Eat '%' | |||
2670 | Lex(); | |||
2671 | if (parseExpression(AbsoluteExp, EndLoc)) | |||
2672 | return false; | |||
2673 | if (!AbsoluteExp->evaluateAsAbsolute(Value, | |||
2674 | getStreamer().getAssemblerPtr())) | |||
2675 | return Error(StrLoc, "expected absolute expression"); | |||
2676 | const char *StrChar = StrLoc.getPointer(); | |||
2677 | const char *EndChar = EndLoc.getPointer(); | |||
2678 | AsmToken newToken(AsmToken::Integer, | |||
2679 | StringRef(StrChar, EndChar - StrChar), Value); | |||
2680 | FA.Value.push_back(newToken); | |||
2681 | } else if (AltMacroMode && Lexer.is(AsmToken::Less) && | |||
2682 | isAltmacroString(StrLoc, EndLoc)) { | |||
2683 | const char *StrChar = StrLoc.getPointer(); | |||
2684 | const char *EndChar = EndLoc.getPointer(); | |||
2685 | jumpToLoc(EndLoc, CurBuffer); | |||
2686 | /// Eat from '<' to '>' | |||
2687 | Lex(); | |||
2688 | AsmToken newToken(AsmToken::String, | |||
2689 | StringRef(StrChar, EndChar - StrChar)); | |||
2690 | FA.Value.push_back(newToken); | |||
2691 | } else if(parseMacroArgument(FA.Value, Vararg)) | |||
2692 | return true; | |||
2693 | ||||
2694 | unsigned PI = Parameter; | |||
2695 | if (!FA.Name.empty()) { | |||
2696 | unsigned FAI = 0; | |||
2697 | for (FAI = 0; FAI < NParameters; ++FAI) | |||
2698 | if (M->Parameters[FAI].Name == FA.Name) | |||
2699 | break; | |||
2700 | ||||
2701 | if (FAI >= NParameters) { | |||
2702 | 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-9~svn362543/lib/MC/MCParser/AsmParser.cpp" , 2702, __PRETTY_FUNCTION__)); | |||
2703 | return Error(IDLoc, "parameter named '" + FA.Name + | |||
2704 | "' does not exist for macro '" + M->Name + "'"); | |||
2705 | } | |||
2706 | PI = FAI; | |||
2707 | } | |||
2708 | ||||
2709 | if (!FA.Value.empty()) { | |||
2710 | if (A.size() <= PI) | |||
2711 | A.resize(PI + 1); | |||
2712 | A[PI] = FA.Value; | |||
2713 | ||||
2714 | if (FALocs.size() <= PI) | |||
2715 | FALocs.resize(PI + 1); | |||
2716 | ||||
2717 | FALocs[PI] = Lexer.getLoc(); | |||
2718 | } | |||
2719 | ||||
2720 | // At the end of the statement, fill in remaining arguments that have | |||
2721 | // default values. If there aren't any, then the next argument is | |||
2722 | // required but missing | |||
2723 | if (Lexer.is(AsmToken::EndOfStatement)) { | |||
2724 | bool Failure = false; | |||
2725 | for (unsigned FAI = 0; FAI < NParameters; ++FAI) { | |||
2726 | if (A[FAI].empty()) { | |||
2727 | if (M->Parameters[FAI].Required) { | |||
2728 | Error(FALocs[FAI].isValid() ? FALocs[FAI] : Lexer.getLoc(), | |||
2729 | "missing value for required parameter " | |||
2730 | "'" + M->Parameters[FAI].Name + "' in macro '" + M->Name + "'"); | |||
2731 | Failure = true; | |||
2732 | } | |||
2733 | ||||
2734 | if (!M->Parameters[FAI].Value.empty()) | |||
2735 | A[FAI] = M->Parameters[FAI].Value; | |||
2736 | } | |||
2737 | } | |||
2738 | return Failure; | |||
2739 | } | |||
2740 | ||||
2741 | if (Lexer.is(AsmToken::Comma)) | |||
2742 | Lex(); | |||
2743 | } | |||
2744 | ||||
2745 | return TokError("too many positional arguments"); | |||
2746 | } | |||
2747 | ||||
2748 | bool AsmParser::handleMacroEntry(const MCAsmMacro *M, SMLoc NameLoc) { | |||
2749 | // Arbitrarily limit macro nesting depth (default matches 'as'). We can | |||
2750 | // eliminate this, although we should protect against infinite loops. | |||
2751 | unsigned MaxNestingDepth = AsmMacroMaxNestingDepth; | |||
2752 | if (ActiveMacros.size() == MaxNestingDepth) { | |||
2753 | std::ostringstream MaxNestingDepthError; | |||
2754 | MaxNestingDepthError << "macros cannot be nested more than " | |||
2755 | << MaxNestingDepth << " levels deep." | |||
2756 | << " Use -asm-macro-max-nesting-depth to increase " | |||
2757 | "this limit."; | |||
2758 | return TokError(MaxNestingDepthError.str()); | |||
2759 | } | |||
2760 | ||||
2761 | MCAsmMacroArguments A; | |||
2762 | if (parseMacroArguments(M, A)) | |||
2763 | return true; | |||
2764 | ||||
2765 | // Macro instantiation is lexical, unfortunately. We construct a new buffer | |||
2766 | // to hold the macro body with substitutions. | |||
2767 | SmallString<256> Buf; | |||
2768 | StringRef Body = M->Body; | |||
2769 | raw_svector_ostream OS(Buf); | |||
2770 | ||||
2771 | if (expandMacro(OS, Body, M->Parameters, A, true, getTok().getLoc())) | |||
2772 | return true; | |||
2773 | ||||
2774 | // We include the .endmacro in the buffer as our cue to exit the macro | |||
2775 | // instantiation. | |||
2776 | OS << ".endmacro\n"; | |||
2777 | ||||
2778 | std::unique_ptr<MemoryBuffer> Instantiation = | |||
2779 | MemoryBuffer::getMemBufferCopy(OS.str(), "<instantiation>"); | |||
2780 | ||||
2781 | // Create the macro instantiation object and add to the current macro | |||
2782 | // instantiation stack. | |||
2783 | MacroInstantiation *MI = new MacroInstantiation( | |||
2784 | NameLoc, CurBuffer, getTok().getLoc(), TheCondStack.size()); | |||
2785 | ActiveMacros.push_back(MI); | |||
2786 | ||||
2787 | ++NumOfMacroInstantiations; | |||
2788 | ||||
2789 | // Jump to the macro instantiation and prime the lexer. | |||
2790 | CurBuffer = SrcMgr.AddNewSourceBuffer(std::move(Instantiation), SMLoc()); | |||
2791 | Lexer.setBuffer(SrcMgr.getMemoryBuffer(CurBuffer)->getBuffer()); | |||
2792 | Lex(); | |||
2793 | ||||
2794 | return false; | |||
2795 | } | |||
2796 | ||||
2797 | void AsmParser::handleMacroExit() { | |||
2798 | // Jump to the EndOfStatement we should return to, and consume it. | |||
2799 | jumpToLoc(ActiveMacros.back()->ExitLoc, ActiveMacros.back()->ExitBuffer); | |||
2800 | Lex(); | |||
2801 | ||||
2802 | // Pop the instantiation entry. | |||
2803 | delete ActiveMacros.back(); | |||
2804 | ActiveMacros.pop_back(); | |||
2805 | } | |||
2806 | ||||
2807 | bool AsmParser::parseAssignment(StringRef Name, bool allow_redef, | |||
2808 | bool NoDeadStrip) { | |||
2809 | MCSymbol *Sym; | |||
2810 | const MCExpr *Value; | |||
2811 | if (MCParserUtils::parseAssignmentExpression(Name, allow_redef, *this, Sym, | |||
2812 | Value)) | |||
2813 | return true; | |||
2814 | ||||
2815 | if (!Sym) { | |||
2816 | // In the case where we parse an expression starting with a '.', we will | |||
2817 | // not generate an error, nor will we create a symbol. In this case we | |||
2818 | // should just return out. | |||
2819 | return false; | |||
2820 | } | |||
2821 | ||||
2822 | // Do the assignment. | |||
2823 | Out.EmitAssignment(Sym, Value); | |||
2824 | if (NoDeadStrip) | |||
2825 | Out.EmitSymbolAttribute(Sym, MCSA_NoDeadStrip); | |||
2826 | ||||
2827 | return false; | |||
2828 | } | |||
2829 | ||||
2830 | /// parseIdentifier: | |||
2831 | /// ::= identifier | |||
2832 | /// ::= string | |||
2833 | bool AsmParser::parseIdentifier(StringRef &Res) { | |||
2834 | // The assembler has relaxed rules for accepting identifiers, in particular we | |||
2835 | // allow things like '.globl $foo' and '.def @feat.00', which would normally be | |||
2836 | // separate tokens. At this level, we have already lexed so we cannot (currently) | |||
2837 | // handle this as a context dependent token, instead we detect adjacent tokens | |||
2838 | // and return the combined identifier. | |||
2839 | if (Lexer.is(AsmToken::Dollar) || Lexer.is(AsmToken::At)) { | |||
2840 | SMLoc PrefixLoc = getLexer().getLoc(); | |||
2841 | ||||
2842 | // Consume the prefix character, and check for a following identifier. | |||
2843 | ||||
2844 | AsmToken Buf[1]; | |||
2845 | Lexer.peekTokens(Buf, false); | |||
2846 | ||||
2847 | if (Buf[0].isNot(AsmToken::Identifier)) | |||
2848 | return true; | |||
2849 | ||||
2850 | // We have a '$' or '@' followed by an identifier, make sure they are adjacent. | |||
2851 | if (PrefixLoc.getPointer() + 1 != Buf[0].getLoc().getPointer()) | |||
2852 | return true; | |||
2853 | ||||
2854 | // eat $ or @ | |||
2855 | Lexer.Lex(); // Lexer's Lex guarantees consecutive token. | |||
2856 | // Construct the joined identifier and consume the token. | |||
2857 | Res = | |||
2858 | StringRef(PrefixLoc.getPointer(), getTok().getIdentifier().size() + 1); | |||
2859 | Lex(); // Parser Lex to maintain invariants. | |||
2860 | return false; | |||
2861 | } | |||
2862 | ||||
2863 | if (Lexer.isNot(AsmToken::Identifier) && Lexer.isNot(AsmToken::String)) | |||
2864 | return true; | |||
2865 | ||||
2866 | Res = getTok().getIdentifier(); | |||
2867 | ||||
2868 | Lex(); // Consume the identifier token. | |||
2869 | ||||
2870 | return false; | |||
2871 | } | |||
2872 | ||||
2873 | /// parseDirectiveSet: | |||
2874 | /// ::= .equ identifier ',' expression | |||
2875 | /// ::= .equiv identifier ',' expression | |||
2876 | /// ::= .set identifier ',' expression | |||
2877 | bool AsmParser::parseDirectiveSet(StringRef IDVal, bool allow_redef) { | |||
2878 | StringRef Name; | |||
2879 | if (check(parseIdentifier(Name), "expected identifier") || | |||
2880 | parseToken(AsmToken::Comma) || parseAssignment(Name, allow_redef, true)) | |||
2881 | return addErrorSuffix(" in '" + Twine(IDVal) + "' directive"); | |||
2882 | return false; | |||
2883 | } | |||
2884 | ||||
2885 | bool AsmParser::parseEscapedString(std::string &Data) { | |||
2886 | if (check(getTok().isNot(AsmToken::String), "expected string")) | |||
2887 | return true; | |||
2888 | ||||
2889 | Data = ""; | |||
2890 | StringRef Str = getTok().getStringContents(); | |||
2891 | for (unsigned i = 0, e = Str.size(); i != e; ++i) { | |||
2892 | if (Str[i] != '\\') { | |||
2893 | Data += Str[i]; | |||
2894 | continue; | |||
2895 | } | |||
2896 | ||||
2897 | // Recognize escaped characters. Note that this escape semantics currently | |||
2898 | // loosely follows Darwin 'as'. Notably, it doesn't support hex escapes. | |||
2899 | ++i; | |||
2900 | if (i == e) | |||
2901 | return TokError("unexpected backslash at end of string"); | |||
2902 | ||||
2903 | // Recognize octal sequences. | |||
2904 | if ((unsigned)(Str[i] - '0') <= 7) { | |||
2905 | // Consume up to three octal characters. | |||
2906 | unsigned Value = Str[i] - '0'; | |||
2907 | ||||
2908 | if (i + 1 != e && ((unsigned)(Str[i + 1] - '0')) <= 7) { | |||
2909 | ++i; | |||
2910 | Value = Value * 8 + (Str[i] - '0'); | |||
2911 | ||||
2912 | if (i + 1 != e && ((unsigned)(Str[i + 1] - '0')) <= 7) { | |||
2913 | ++i; | |||
2914 | Value = Value * 8 + (Str[i] - '0'); | |||
2915 | } | |||
2916 | } | |||
2917 | ||||
2918 | if (Value > 255) | |||
2919 | return TokError("invalid octal escape sequence (out of range)"); | |||
2920 | ||||
2921 | Data += (unsigned char)Value; | |||
2922 | continue; | |||
2923 | } | |||
2924 | ||||
2925 | // Otherwise recognize individual escapes. | |||
2926 | switch (Str[i]) { | |||
2927 | default: | |||
2928 | // Just reject invalid escape sequences for now. | |||
2929 | return TokError("invalid escape sequence (unrecognized character)"); | |||
2930 | ||||
2931 | case 'b': Data += '\b'; break; | |||
2932 | case 'f': Data += '\f'; break; | |||
2933 | case 'n': Data += '\n'; break; | |||
2934 | case 'r': Data += '\r'; break; | |||
2935 | case 't': Data += '\t'; break; | |||
2936 | case '"': Data += '"'; break; | |||
2937 | case '\\': Data += '\\'; break; | |||
2938 | } | |||
2939 | } | |||
2940 | ||||
2941 | Lex(); | |||
2942 | return false; | |||
2943 | } | |||
2944 | ||||
2945 | /// parseDirectiveAscii: | |||
2946 | /// ::= ( .ascii | .asciz | .string ) [ "string" ( , "string" )* ] | |||
2947 | bool AsmParser::parseDirectiveAscii(StringRef IDVal, bool ZeroTerminated) { | |||
2948 | auto parseOp = [&]() -> bool { | |||
2949 | std::string Data; | |||
2950 | if (checkForValidSection() || parseEscapedString(Data)) | |||
2951 | return true; | |||
2952 | getStreamer().EmitBytes(Data); | |||
2953 | if (ZeroTerminated) | |||
2954 | getStreamer().EmitBytes(StringRef("\0", 1)); | |||
2955 | return false; | |||
2956 | }; | |||
2957 | ||||
2958 | if (parseMany(parseOp)) | |||
2959 | return addErrorSuffix(" in '" + Twine(IDVal) + "' directive"); | |||
2960 | return false; | |||
2961 | } | |||
2962 | ||||
2963 | /// parseDirectiveReloc | |||
2964 | /// ::= .reloc expression , identifier [ , expression ] | |||
2965 | bool AsmParser::parseDirectiveReloc(SMLoc DirectiveLoc) { | |||
2966 | const MCExpr *Offset; | |||
2967 | const MCExpr *Expr = nullptr; | |||
2968 | int64_t OffsetValue; | |||
2969 | SMLoc OffsetLoc = Lexer.getTok().getLoc(); | |||
2970 | ||||
2971 | if (parseExpression(Offset)) | |||
2972 | return true; | |||
2973 | ||||
2974 | if ((Offset->evaluateAsAbsolute(OffsetValue, | |||
2975 | getStreamer().getAssemblerPtr()) && | |||
2976 | check(OffsetValue < 0, OffsetLoc, "expression is negative")) || | |||
2977 | (check(Offset->getKind() != llvm::MCExpr::Constant && | |||
2978 | Offset->getKind() != llvm::MCExpr::SymbolRef, | |||
2979 | OffsetLoc, "expected non-negative number or a label")) || | |||
2980 | (parseToken(AsmToken::Comma, "expected comma") || | |||
2981 | check(getTok().isNot(AsmToken::Identifier), "expected relocation name"))) | |||
2982 | return true; | |||
2983 | ||||
2984 | SMLoc NameLoc = Lexer.getTok().getLoc(); | |||
2985 | StringRef Name = Lexer.getTok().getIdentifier(); | |||
2986 | Lex(); | |||
2987 | ||||
2988 | if (Lexer.is(AsmToken::Comma)) { | |||
2989 | Lex(); | |||
2990 | SMLoc ExprLoc = Lexer.getLoc(); | |||
2991 | if (parseExpression(Expr)) | |||
2992 | return true; | |||
2993 | ||||
2994 | MCValue Value; | |||
2995 | if (!Expr->evaluateAsRelocatable(Value, nullptr, nullptr)) | |||
2996 | return Error(ExprLoc, "expression must be relocatable"); | |||
2997 | } | |||
2998 | ||||
2999 | if (parseToken(AsmToken::EndOfStatement, | |||
3000 | "unexpected token in .reloc directive")) | |||
3001 | return true; | |||
3002 | ||||
3003 | const MCTargetAsmParser &MCT = getTargetParser(); | |||
3004 | const MCSubtargetInfo &STI = MCT.getSTI(); | |||
3005 | if (getStreamer().EmitRelocDirective(*Offset, Name, Expr, DirectiveLoc, STI)) | |||
3006 | return Error(NameLoc, "unknown relocation name"); | |||
3007 | ||||
3008 | return false; | |||
3009 | } | |||
3010 | ||||
3011 | /// parseDirectiveValue | |||
3012 | /// ::= (.byte | .short | ... ) [ expression (, expression)* ] | |||
3013 | bool AsmParser::parseDirectiveValue(StringRef IDVal, unsigned Size) { | |||
3014 | auto parseOp = [&]() -> bool { | |||
3015 | const MCExpr *Value; | |||
3016 | SMLoc ExprLoc = getLexer().getLoc(); | |||
3017 | if (checkForValidSection() || parseExpression(Value)) | |||
3018 | return true; | |||
3019 | // Special case constant expressions to match code generator. | |||
3020 | if (const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Value)) { | |||
3021 | assert(Size <= 8 && "Invalid size")((Size <= 8 && "Invalid size") ? static_cast<void > (0) : __assert_fail ("Size <= 8 && \"Invalid size\"" , "/build/llvm-toolchain-snapshot-9~svn362543/lib/MC/MCParser/AsmParser.cpp" , 3021, __PRETTY_FUNCTION__)); | |||
3022 | uint64_t IntValue = MCE->getValue(); | |||
3023 | if (!isUIntN(8 * Size, IntValue) && !isIntN(8 * Size, IntValue)) | |||
3024 | return Error(ExprLoc, "out of range literal value"); | |||
3025 | getStreamer().EmitIntValue(IntValue, Size); | |||
3026 | } else | |||
3027 | getStreamer().EmitValue(Value, Size, ExprLoc); | |||
3028 | return false; | |||
3029 | }; | |||
3030 | ||||
3031 | if (parseMany(parseOp)) | |||
3032 | return addErrorSuffix(" in '" + Twine(IDVal) + "' directive"); | |||
3033 | return false; | |||
3034 | } | |||
3035 | ||||
3036 | static bool parseHexOcta(AsmParser &Asm, uint64_t &hi, uint64_t &lo) { | |||
3037 | if (Asm.getTok().isNot(AsmToken::Integer) && | |||
3038 | Asm.getTok().isNot(AsmToken::BigNum)) | |||
3039 | return Asm.TokError("unknown token in expression"); | |||
3040 | SMLoc ExprLoc = Asm.getTok().getLoc(); | |||
3041 | APInt IntValue = Asm.getTok().getAPIntVal(); | |||
3042 | Asm.Lex(); | |||
3043 | if (!IntValue.isIntN(128)) | |||
3044 | return Asm.Error(ExprLoc, "out of range literal value"); | |||
3045 | if (!IntValue.isIntN(64)) { | |||
3046 | hi = IntValue.getHiBits(IntValue.getBitWidth() - 64).getZExtValue(); | |||
3047 | lo = IntValue.getLoBits(64).getZExtValue(); | |||
3048 | } else { | |||
3049 | hi = 0; | |||
3050 | lo = IntValue.getZExtValue(); | |||
3051 | } | |||
3052 | return false; | |||
3053 | } | |||
3054 | ||||
3055 | /// ParseDirectiveOctaValue | |||
3056 | /// ::= .octa [ hexconstant (, hexconstant)* ] | |||
3057 | ||||
3058 | bool AsmParser::parseDirectiveOctaValue(StringRef IDVal) { | |||
3059 | auto parseOp = [&]() -> bool { | |||
3060 | if (checkForValidSection()) | |||
| ||||
3061 | return true; | |||
3062 | uint64_t hi, lo; | |||
3063 | if (parseHexOcta(*this, hi, lo)) | |||
3064 | return true; | |||
3065 | if (MAI.isLittleEndian()) { | |||
3066 | getStreamer().EmitIntValue(lo, 8); | |||
| ||||
3067 | getStreamer().EmitIntValue(hi, 8); | |||
3068 | } else { | |||
3069 | getStreamer().EmitIntValue(hi, 8); | |||
3070 | getStreamer().EmitIntValue(lo, 8); | |||
3071 | } | |||
3072 | return false; | |||
3073 | }; | |||
3074 | ||||
3075 | if (parseMany(parseOp)) | |||
3076 | return addErrorSuffix(" in '" + Twine(IDVal) + "' directive"); | |||
3077 | return false; | |||
3078 | } | |||
3079 | ||||
3080 | bool AsmParser::parseRealValue(const fltSemantics &Semantics, APInt &Res) { | |||
3081 | // We don't truly support arithmetic on floating point expressions, so we | |||
3082 | // have to manually parse unary prefixes. | |||
3083 | bool IsNeg = false; | |||
3084 | if (getLexer().is(AsmToken::Minus)) { | |||
3085 | Lexer.Lex(); | |||
3086 | IsNeg = true; | |||
3087 | } else if (getLexer().is(AsmToken::Plus)) | |||
3088 | Lexer.Lex(); | |||
3089 | ||||
3090 | if (Lexer.is(AsmToken::Error)) | |||
3091 | return TokError(Lexer.getErr()); | |||
3092 | if (Lexer.isNot(AsmToken::Integer) && Lexer.isNot(AsmToken::Real) && | |||
3093 | Lexer.isNot(AsmToken::Identifier)) | |||
3094 | return TokError("unexpected token in directive"); | |||
3095 | ||||
3096 | // Convert to an APFloat. | |||
3097 | APFloat Value(Semantics); | |||
3098 | StringRef IDVal = getTok().getString(); | |||
3099 | if (getLexer().is(AsmToken::Identifier)) { | |||
3100 | if (!IDVal.compare_lower("infinity") || !IDVal.compare_lower("inf")) | |||
3101 | Value = APFloat::getInf(Semantics); | |||
3102 | else if (!IDVal.compare_lower("nan")) | |||
3103 | Value = APFloat::getNaN(Semantics, false, ~0); | |||
3104 | else | |||
3105 | return TokError("invalid floating point literal"); | |||
3106 | } else if (Value.convertFromString(IDVal, APFloat::rmNearestTiesToEven) == | |||
3107 | APFloat::opInvalidOp) | |||
3108 | return TokError("invalid floating point literal"); | |||
3109 | if (IsNeg) | |||
3110 | Value.changeSign(); | |||
3111 | ||||
3112 | // Consume the numeric token. | |||
3113 | Lex(); | |||
3114 | ||||
3115 | Res = Value.bitcastToAPInt(); | |||
3116 | ||||
3117 | return false; | |||
3118 | } | |||
3119 | ||||
3120 | /// parseDirectiveRealValue | |||
3121 | /// ::= (.single | .double) [ expression (, expression)* ] | |||
3122 | bool AsmParser::parseDirectiveRealValue(StringRef IDVal, | |||
3123 | const fltSemantics &Semantics) { | |||
3124 | auto parseOp = [&]() -> bool { | |||
3125 | APInt AsInt; | |||
3126 | if (checkForValidSection() || parseRealValue(Semantics, AsInt)) | |||
3127 | return true; | |||
3128 | getStreamer().EmitIntValue(AsInt.getLimitedValue(), | |||
3129 | AsInt.getBitWidth() / 8); | |||
3130 | return false; | |||
3131 | }; | |||
3132 | ||||
3133 | if (parseMany(parseOp)) | |||
3134 | return addErrorSuffix(" in '" + Twine(IDVal) + "' directive"); | |||
3135 | return false; | |||
3136 | } | |||
3137 | ||||
3138 | /// parseDirectiveZero | |||
3139 | /// ::= .zero expression | |||
3140 | bool AsmParser::parseDirectiveZero() { | |||
3141 | SMLoc NumBytesLoc = Lexer.getLoc(); | |||
3142 | const MCExpr *NumBytes; | |||
3143 | if (checkForValidSection() || parseExpression(NumBytes)) | |||
3144 | return true; | |||
3145 | ||||
3146 | int64_t Val = 0; | |||
3147 | if (getLexer().is(AsmToken::Comma)) { | |||
3148 | Lex(); | |||
3149 | if (parseAbsoluteExpression(Val)) | |||
3150 | return true; | |||
3151 | } | |||
3152 | ||||
3153 | if (parseToken(AsmToken::EndOfStatement, | |||
3154 | "unexpected token in '.zero' directive")) | |||
3155 | return true; | |||
3156 | getStreamer().emitFill(*NumBytes, Val, NumBytesLoc); | |||
3157 | ||||
3158 | return false; | |||
3159 | } | |||
3160 | ||||
3161 | /// parseDirectiveFill | |||
3162 | /// ::= .fill expression [ , expression [ , expression ] ] | |||
3163 | bool AsmParser::parseDirectiveFill() { | |||
3164 | SMLoc NumValuesLoc = Lexer.getLoc(); | |||
3165 | const MCExpr *NumValues; | |||
3166 | if (checkForValidSection() || parseExpression(NumValues)) | |||
3167 | return true; | |||
3168 | ||||
3169 | int64_t FillSize = 1; | |||
3170 | int64_t FillExpr = 0; | |||
3171 | ||||
3172 | SMLoc SizeLoc, ExprLoc; | |||
3173 | ||||
3174 | if (parseOptionalToken(AsmToken::Comma)) { | |||
3175 | SizeLoc = getTok().getLoc(); | |||
3176 | if (parseAbsoluteExpression(FillSize)) | |||
3177 | return true; | |||
3178 | if (parseOptionalToken(AsmToken::Comma)) { | |||
3179 | ExprLoc = getTok().getLoc(); | |||
3180 | if (parseAbsoluteExpression(FillExpr)) | |||
3181 | return true; | |||
3182 | } | |||
3183 | } | |||
3184 | if (parseToken(AsmToken::EndOfStatement, | |||
3185 | "unexpected token in '.fill' directive")) | |||
3186 | return true; | |||
3187 | ||||
3188 | if (FillSize < 0) { | |||
3189 | Warning(SizeLoc, "'.fill' directive with negative size has no effect"); | |||
3190 | return false; | |||
3191 | } | |||
3192 | if (FillSize > 8) { | |||
3193 | Warning(SizeLoc, "'.fill' directive with size greater than 8 has been truncated to 8"); | |||
3194 | FillSize = 8; | |||
3195 | } | |||
3196 | ||||
3197 | if (!isUInt<32>(FillExpr) && FillSize > 4) | |||
3198 | Warning(ExprLoc, "'.fill' directive pattern has been truncated to 32-bits"); | |||
3199 | ||||
3200 | getStreamer().emitFill(*NumValues, FillSize, FillExpr, NumValuesLoc); | |||
3201 | ||||
3202 | return false; | |||
3203 | } | |||
3204 | ||||
3205 | /// parseDirectiveOrg | |||
3206 | /// ::= .org expression [ , expression ] | |||
3207 | bool AsmParser::parseDirectiveOrg() { | |||
3208 | const MCExpr *Offset; | |||
3209 | SMLoc OffsetLoc = Lexer.getLoc(); | |||
3210 | if (checkForValidSection() || parseExpression(Offset)) | |||
3211 | return true; | |||
3212 | ||||
3213 | // Parse optional fill expression. | |||
3214 | int64_t FillExpr = 0; | |||
3215 | if (parseOptionalToken(AsmToken::Comma)) | |||
3216 | if (parseAbsoluteExpression(FillExpr)) | |||
3217 | return addErrorSuffix(" in '.org' directive"); | |||
3218 | if (parseToken(AsmToken::EndOfStatement)) | |||
3219 | return addErrorSuffix(" in '.org' directive"); | |||
3220 | ||||
3221 | getStreamer().emitValueToOffset(Offset, FillExpr, OffsetLoc); | |||
3222 | return false; | |||
3223 | } | |||
3224 | ||||
3225 | /// parseDirectiveAlign | |||
3226 | /// ::= {.align, ...} expression [ , expression [ , expression ]] | |||
3227 | bool AsmParser::parseDirectiveAlign(bool IsPow2, unsigned ValueSize) { | |||
3228 | SMLoc AlignmentLoc = getLexer().getLoc(); | |||
3229 | int64_t Alignment; | |||
3230 | SMLoc MaxBytesLoc; | |||
3231 | bool HasFillExpr = false; | |||
3232 | int64_t FillExpr = 0; | |||
3233 | int64_t MaxBytesToFill = 0; | |||
3234 | ||||
3235 | auto parseAlign = [&]() -> bool { | |||
3236 | if (parseAbsoluteExpression(Alignment)) | |||
3237 | return true; | |||
3238 | if (parseOptionalToken(AsmToken::Comma)) { | |||
3239 | // The fill expression can be omitted while specifying a maximum number of | |||
3240 | // alignment bytes, e.g: | |||
3241 | // .align 3,,4 | |||
3242 | if (getTok().isNot(AsmToken::Comma)) { | |||
3243 | HasFillExpr = true; | |||
3244 | if (parseAbsoluteExpression(FillExpr)) | |||
3245 | return true; | |||
3246 | } | |||
3247 | if (parseOptionalToken(AsmToken::Comma)) | |||
3248 | if (parseTokenLoc(MaxBytesLoc) || | |||
3249 | parseAbsoluteExpression(MaxBytesToFill)) | |||
3250 | return true; | |||
3251 | } | |||
3252 | return parseToken(AsmToken::EndOfStatement); | |||
3253 | }; | |||
3254 | ||||
3255 | if (checkForValidSection()) | |||
3256 | return addErrorSuffix(" in directive"); | |||
3257 | // Ignore empty '.p2align' directives for GNU-as compatibility | |||
3258 | if (IsPow2 && (ValueSize == 1) && getTok().is(AsmToken::EndOfStatement)) { | |||
3259 | Warning(AlignmentLoc, "p2align directive with no operand(s) is ignored"); | |||
3260 | return parseToken(AsmToken::EndOfStatement); | |||
3261 | } | |||
3262 | if (parseAlign()) | |||
3263 | return addErrorSuffix(" in directive"); | |||
3264 | ||||
3265 | // Always emit an alignment here even if we thrown an error. | |||
3266 | bool ReturnVal = false; | |||
3267 | ||||
3268 | // Compute alignment in bytes. | |||
3269 | if (IsPow2) { | |||
3270 | // FIXME: Diagnose overflow. | |||
3271 | if (Alignment >= 32) { | |||
3272 | ReturnVal |= Error(AlignmentLoc, "invalid alignment value"); | |||
3273 | Alignment = 31; | |||
3274 | } | |||
3275 | ||||
3276 | Alignment = 1ULL << Alignment; | |||
3277 | } else { | |||
3278 | // Reject alignments that aren't either a power of two or zero, | |||
3279 | // for gas compatibility. Alignment of zero is silently rounded | |||
3280 | // up to one. | |||
3281 | if (Alignment == 0) | |||
3282 | Alignment = 1; | |||
3283 | if (!isPowerOf2_64(Alignment)) | |||
3284 | ReturnVal |= Error(AlignmentLoc, "alignment must be a power of 2"); | |||
3285 | } | |||
3286 | ||||
3287 | // Diagnose non-sensical max bytes to align. | |||
3288 | if (MaxBytesLoc.isValid()) { | |||
3289 | if (MaxBytesToFill < 1) { | |||
3290 | ReturnVal |= Error(MaxBytesLoc, | |||
3291 | "alignment directive can never be satisfied in this " | |||
3292 | "many bytes, ignoring maximum bytes expression"); | |||
3293 | MaxBytesToFill = 0; | |||
3294 | } | |||
3295 | ||||
3296 | if (MaxBytesToFill >= Alignment) { | |||
3297 | Warning(MaxBytesLoc, "maximum bytes expression exceeds alignment and " | |||
3298 | "has no effect"); | |||
3299 | MaxBytesToFill = 0; | |||
3300 | } | |||
3301 | } | |||
3302 | ||||
3303 | // Check whether we should use optimal code alignment for this .align | |||
3304 | // directive. | |||
3305 | const MCSection *Section = getStreamer().getCurrentSectionOnly(); | |||
3306 | 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-9~svn362543/lib/MC/MCParser/AsmParser.cpp" , 3306, __PRETTY_FUNCTION__)); | |||
3307 | bool UseCodeAlign = Section->UseCodeAlign(); | |||
3308 | if ((!HasFillExpr || Lexer.getMAI().getTextAlignFillValue() == FillExpr) && | |||
3309 | ValueSize == 1 && UseCodeAlign) { | |||
3310 | getStreamer().EmitCodeAlignment(Alignment, MaxBytesToFill); | |||
3311 | } else { | |||
3312 | // FIXME: Target specific behavior about how the "extra" bytes are filled. | |||
3313 | getStreamer().EmitValueToAlignment(Alignment, FillExpr, ValueSize, | |||
3314 | MaxBytesToFill); | |||
3315 | } | |||
3316 | ||||
3317 | return ReturnVal; | |||
3318 | } | |||
3319 | ||||
3320 | /// parseDirectiveFile | |||
3321 | /// ::= .file filename | |||
3322 | /// ::= .file number [directory] filename [md5 checksum] [source source-text] | |||
3323 | bool AsmParser::parseDirectiveFile(SMLoc DirectiveLoc) { | |||
3324 | // FIXME: I'm not sure what this is. | |||
3325 | int64_t FileNumber = -1; | |||
3326 | if (getLexer().is(AsmToken::Integer)) { | |||
3327 | FileNumber = getTok().getIntVal(); | |||
3328 | Lex(); | |||
3329 | ||||
3330 | if (FileNumber < 0) | |||
3331 | return TokError("negative file number"); | |||
3332 | } | |||
3333 | ||||
3334 | std::string Path; | |||
3335 | ||||
3336 | // Usually the directory and filename together, otherwise just the directory. | |||
3337 | // Allow the strings to have escaped octal character sequence. | |||
3338 | if (check(getTok().isNot(AsmToken::String), | |||
3339 | "unexpected token in '.file' directive") || | |||
3340 | parseEscapedString(Path)) | |||
3341 | return true; | |||
3342 | ||||
3343 | StringRef Directory; | |||
3344 | StringRef Filename; | |||
3345 | std::string FilenameData; | |||
3346 | if (getLexer().is(AsmToken::String)) { | |||
3347 | if (check(FileNumber == -1, | |||
3348 | "explicit path specified, but no file number") || | |||
3349 | parseEscapedString(FilenameData)) | |||
3350 | return true; | |||
3351 | Filename = FilenameData; | |||
3352 | Directory = Path; | |||
3353 | } else { | |||
3354 | Filename = Path; | |||
3355 | } | |||
3356 | ||||
3357 | uint64_t MD5Hi, MD5Lo; | |||
3358 | bool HasMD5 = false; | |||
3359 | ||||
3360 | Optional<StringRef> Source; | |||
3361 | bool HasSource = false; | |||
3362 | std::string SourceString; | |||
3363 | ||||
3364 | while (!parseOptionalToken(AsmToken::EndOfStatement)) { | |||
3365 | StringRef Keyword; | |||
3366 | if (check(getTok().isNot(AsmToken::Identifier), | |||
3367 | "unexpected token in '.file' directive") || | |||
3368 | parseIdentifier(Keyword)) | |||
3369 | return true; | |||
3370 | if (Keyword == "md5") { | |||
3371 | HasMD5 = true; | |||
3372 | if (check(FileNumber == -1, | |||
3373 | "MD5 checksum specified, but no file number") || | |||
3374 | parseHexOcta(*this, MD5Hi, MD5Lo)) | |||
3375 | return true; | |||
3376 | } else if (Keyword == "source") { | |||
3377 | HasSource = true; | |||
3378 | if (check(FileNumber == -1, | |||
3379 | "source specified, but no file number") || | |||
3380 | check(getTok().isNot(AsmToken::String), | |||
3381 | "unexpected token in '.file' directive") || | |||
3382 | parseEscapedString(SourceString)) | |||
3383 | return true; | |||
3384 | } else { | |||
3385 | return TokError("unexpected token in '.file' directive"); | |||
3386 | } | |||
3387 | } | |||
3388 | ||||
3389 | if (FileNumber == -1) { | |||
3390 | // Ignore the directive if there is no number and the target doesn't support | |||
3391 | // numberless .file directives. This allows some portability of assembler | |||
3392 | // between different object file formats. | |||
3393 | if (getContext().getAsmInfo()->hasSingleParameterDotFile()) | |||
3394 | getStreamer().EmitFileDirective(Filename); | |||
3395 | } else { | |||
3396 | // In case there is a -g option as well as debug info from directive .file, | |||
3397 | // we turn off the -g option, directly use the existing debug info instead. | |||
3398 | // Also reset any implicit ".file 0" for the assembler source. | |||
3399 | if (Ctx.getGenDwarfForAssembly()) { | |||
3400 | Ctx.getMCDwarfLineTable(0).resetRootFile(); | |||
3401 | Ctx.setGenDwarfForAssembly(false); | |||
3402 | } | |||
3403 | ||||
3404 | Optional<MD5::MD5Result> CKMem; | |||
3405 | if (HasMD5) { | |||
3406 | MD5::MD5Result Sum; | |||
3407 | for (unsigned i = 0; i != 8; ++i) { | |||
3408 | Sum.Bytes[i] = uint8_t(MD5Hi >> ((7 - i) * 8)); | |||
3409 | Sum.Bytes[i + 8] = uint8_t(MD5Lo >> ((7 - i) * 8)); | |||
3410 | } | |||
3411 | CKMem = Sum; | |||
3412 | } | |||
3413 | if (HasSource) { | |||
3414 | char *SourceBuf = static_cast<char *>(Ctx.allocate(SourceString.size())); | |||
3415 | memcpy(SourceBuf, SourceString.data(), SourceString.size()); | |||
3416 | Source = StringRef(SourceBuf, SourceString.size()); | |||
3417 | } | |||
3418 | if (FileNumber == 0) { | |||
3419 | if (Ctx.getDwarfVersion() < 5) | |||
3420 | return Warning(DirectiveLoc, "file 0 not supported prior to DWARF-5"); | |||
3421 | getStreamer().emitDwarfFile0Directive(Directory, Filename, CKMem, Source); | |||
3422 | } else { | |||
3423 | Expected<unsigned> FileNumOrErr = getStreamer().tryEmitDwarfFileDirective( | |||
3424 | FileNumber, Directory, Filename, CKMem, Source); | |||
3425 | if (!FileNumOrErr) | |||
3426 | return Error(DirectiveLoc, toString(FileNumOrErr.takeError())); | |||
3427 | FileNumber = FileNumOrErr.get(); | |||
3428 | } | |||
3429 | // Alert the user if there are some .file directives with MD5 and some not. | |||
3430 | // But only do that once. | |||
3431 | if (!ReportedInconsistentMD5 && !Ctx.isDwarfMD5UsageConsistent(0)) { | |||
3432 | ReportedInconsistentMD5 = true; | |||
3433 | return Warning(DirectiveLoc, "inconsistent use of MD5 checksums"); | |||
3434 | } | |||
3435 | } | |||
3436 | ||||
3437 | return false; | |||
3438 | } | |||
3439 | ||||
3440 | /// parseDirectiveLine | |||
3441 | /// ::= .line [number] | |||
3442 | bool AsmParser::parseDirectiveLine() { | |||
3443 | int64_t LineNumber; | |||
3444 | if (getLexer().is(AsmToken::Integer)) { | |||
3445 | if (parseIntToken(LineNumber, "unexpected token in '.line' directive")) | |||
3446 | return true; | |||
3447 | (void)LineNumber; | |||
3448 | // FIXME: Do something with the .line. | |||
3449 | } | |||
3450 | if (parseToken(AsmToken::EndOfStatement, | |||
3451 | "unexpected token in '.line' directive")) | |||
3452 | return true; | |||
3453 | ||||
3454 | return false; | |||
3455 | } | |||
3456 | ||||
3457 | /// parseDirectiveLoc | |||
3458 | /// ::= .loc FileNumber [LineNumber] [ColumnPos] [basic_block] [prologue_end] | |||
3459 | /// [epilogue_begin] [is_stmt VALUE] [isa VALUE] | |||
3460 | /// The first number is a file number, must have been previously assigned with | |||
3461 | /// a .file directive, the second number is the line number and optionally the | |||
3462 | /// third number is a column position (zero if not specified). The remaining | |||
3463 | /// optional items are .loc sub-directives. | |||
3464 | bool AsmParser::parseDirectiveLoc() { | |||
3465 | int64_t FileNumber = 0, LineNumber = 0; | |||
3466 | SMLoc Loc = getTok().getLoc(); | |||
3467 | if (parseIntToken(FileNumber, "unexpected token in '.loc' directive") || | |||
3468 | check(FileNumber < 1 && Ctx.getDwarfVersion() < 5, Loc, | |||
3469 | "file number less than one in '.loc' directive") || | |||
3470 | check(!getContext().isValidDwarfFileNumber(FileNumber), Loc, | |||
3471 | "unassigned file number in '.loc' directive")) | |||
3472 | return true; | |||
3473 | ||||
3474 | // optional | |||
3475 | if (getLexer().is(AsmToken::Integer)) { | |||
3476 | LineNumber = getTok().getIntVal(); | |||
3477 | if (LineNumber < 0) | |||
3478 | return TokError("line number less than zero in '.loc' directive"); | |||
3479 | Lex(); | |||
3480 | } | |||
3481 | ||||
3482 | int64_t ColumnPos = 0; | |||
3483 | if (getLexer().is(AsmToken::Integer)) { | |||
3484 | ColumnPos = getTok().getIntVal(); | |||
3485 | if (ColumnPos < 0) | |||
3486 | return TokError("column position less than zero in '.loc' directive"); | |||
3487 | Lex(); | |||
3488 | } | |||
3489 | ||||
3490 | unsigned Flags = DWARF2_LINE_DEFAULT_IS_STMT1 ? DWARF2_FLAG_IS_STMT(1 << 0) : 0; | |||
3491 | unsigned Isa = 0; | |||
3492 | int64_t Discriminator = 0; | |||
3493 | ||||
3494 | auto parseLocOp = [&]() -> bool { | |||
3495 | StringRef Name; | |||
3496 | SMLoc Loc = getTok().getLoc(); | |||
3497 | if (parseIdentifier(Name)) | |||
3498 | return TokError("unexpected token in '.loc' directive"); | |||
3499 | ||||
3500 | if (Name == "basic_block") | |||
3501 | Flags |= DWARF2_FLAG_BASIC_BLOCK(1 << 1); | |||
3502 | else if (Name == "prologue_end") | |||
3503 | Flags |= DWARF2_FLAG_PROLOGUE_END(1 << 2); | |||
3504 | else if (Name == "epilogue_begin") | |||
3505 | Flags |= DWARF2_FLAG_EPILOGUE_BEGIN(1 << 3); | |||
3506 | else if (Name == "is_stmt") { | |||
3507 | Loc = getTok().getLoc(); | |||
3508 | const MCExpr *Value; | |||
3509 | if (parseExpression(Value)) | |||
3510 | return true; | |||
3511 | // The expression must be the constant 0 or 1. | |||
3512 | if (const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Value)) { | |||
3513 | int Value = MCE->getValue(); | |||
3514 | if (Value == 0) | |||
3515 | Flags &= ~DWARF2_FLAG_IS_STMT(1 << 0); | |||
3516 | else if (Value == 1) | |||
3517 | Flags |= DWARF2_FLAG_IS_STMT(1 << 0); | |||
3518 | else | |||
3519 | return Error(Loc, "is_stmt value not 0 or 1"); | |||
3520 | } else { | |||
3521 | return Error(Loc, "is_stmt value not the constant value of 0 or 1"); | |||
3522 | } | |||
3523 | } else if (Name == "isa") { | |||
3524 | Loc = getTok().getLoc(); | |||
3525 | const MCExpr *Value; | |||
3526 | if (parseExpression(Value)) | |||
3527 | return true; | |||
3528 | // The expression must be a constant greater or equal to 0. | |||
3529 | if (const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Value)) { | |||
3530 | int Value = MCE->getValue(); | |||
3531 | if (Value < 0) | |||
3532 | return Error(Loc, "isa number less than zero"); | |||
3533 | Isa = Value; | |||
3534 | } else { | |||
3535 | return Error(Loc, "isa number not a constant value"); | |||
3536 | } | |||
3537 | } else if (Name == "discriminator") { | |||
3538 | if (parseAbsoluteExpression(Discriminator)) | |||
3539 | return true; | |||
3540 | } else { | |||
3541 | return Error(Loc, "unknown sub-directive in '.loc' directive"); | |||
3542 | } | |||
3543 | return false; | |||
3544 | }; | |||
3545 | ||||
3546 | if (parseMany(parseLocOp, false /*hasComma*/)) | |||
3547 | return true; | |||
3548 | ||||
3549 | getStreamer().EmitDwarfLocDirective(FileNumber, LineNumber, ColumnPos, Flags, | |||
3550 | Isa, Discriminator, StringRef()); | |||
3551 | ||||
3552 | return false; | |||
3553 | } | |||
3554 | ||||
3555 | /// parseDirectiveStabs | |||
3556 | /// ::= .stabs string, number, number, number | |||
3557 | bool AsmParser::parseDirectiveStabs() { | |||
3558 | return TokError("unsupported directive '.stabs'"); | |||
3559 | } | |||
3560 | ||||
3561 | /// parseDirectiveCVFile | |||
3562 | /// ::= .cv_file number filename [checksum] [checksumkind] | |||
3563 | bool AsmParser::parseDirectiveCVFile() { | |||
3564 | SMLoc FileNumberLoc = getTok().getLoc(); | |||
3565 | int64_t FileNumber; | |||
3566 | std::string Filename; | |||
3567 | std::string Checksum; | |||
3568 | int64_t ChecksumKind = 0; | |||
3569 | ||||
3570 | if (parseIntToken(FileNumber, | |||
3571 | "expected file number in '.cv_file' directive") || | |||
3572 | check(FileNumber < 1, FileNumberLoc, "file number less than one") || | |||
3573 | check(getTok().isNot(AsmToken::String), | |||
3574 | "unexpected token in '.cv_file' directive") || | |||
3575 | parseEscapedString(Filename)) | |||
3576 | return true; | |||
3577 | if (!parseOptionalToken(AsmToken::EndOfStatement)) { | |||
3578 | if (check(getTok().isNot(AsmToken::String), | |||
3579 | "unexpected token in '.cv_file' directive") || | |||
3580 | parseEscapedString(Checksum) || | |||
3581 | parseIntToken(ChecksumKind, | |||
3582 | "expected checksum kind in '.cv_file' directive") || | |||
3583 | parseToken(AsmToken::EndOfStatement, | |||
3584 | "unexpected token in '.cv_file' directive")) | |||
3585 | return true; | |||
3586 | } | |||
3587 | ||||
3588 | Checksum = fromHex(Checksum); | |||
3589 | void *CKMem = Ctx.allocate(Checksum.size(), 1); | |||
3590 | memcpy(CKMem, Checksum.data(), Checksum.size()); | |||
3591 | ArrayRef<uint8_t> ChecksumAsBytes(reinterpret_cast<const uint8_t *>(CKMem), | |||
3592 | Checksum.size()); | |||
3593 | ||||
3594 | if (!getStreamer().EmitCVFileDirective(FileNumber, Filename, ChecksumAsBytes, | |||
3595 | static_cast<uint8_t>(ChecksumKind))) | |||
3596 | return Error(FileNumberLoc, "file number already allocated"); | |||
3597 | ||||
3598 | return false; | |||
3599 | } | |||
3600 | ||||
3601 | bool AsmParser::parseCVFunctionId(int64_t &FunctionId, | |||
3602 | StringRef DirectiveName) { | |||
3603 | SMLoc Loc; | |||
3604 | return parseTokenLoc(Loc) || | |||
3605 | parseIntToken(FunctionId, "expected function id in '" + DirectiveName + | |||
3606 | "' directive") || | |||
3607 | check(FunctionId < 0 || FunctionId >= UINT_MAX(2147483647 *2U +1U), Loc, | |||
3608 | "expected function id within range [0, UINT_MAX)"); | |||
3609 | } | |||
3610 | ||||
3611 | bool AsmParser::parseCVFileId(int64_t &FileNumber, StringRef DirectiveName) { | |||
3612 | SMLoc Loc; | |||
3613 | return parseTokenLoc(Loc) || | |||
3614 | parseIntToken(FileNumber, "expected integer in '" + DirectiveName + | |||
3615 | "' directive") || | |||
3616 | check(FileNumber < 1, Loc, "file number less than one in '" + | |||
3617 | DirectiveName + "' directive") || | |||
3618 | check(!getCVContext().isValidFileNumber(FileNumber), Loc, | |||
3619 | "unassigned file number in '" + DirectiveName + "' directive"); | |||
3620 | } | |||
3621 | ||||
3622 | /// parseDirectiveCVFuncId | |||
3623 | /// ::= .cv_func_id FunctionId | |||
3624 | /// | |||
3625 | /// Introduces a function ID that can be used with .cv_loc. | |||
3626 | bool AsmParser::parseDirectiveCVFuncId() { | |||
3627 | SMLoc FunctionIdLoc = getTok().getLoc(); | |||
3628 | int64_t FunctionId; | |||
3629 | ||||
3630 | if (parseCVFunctionId(FunctionId, ".cv_func_id") || | |||
3631 | parseToken(AsmToken::EndOfStatement, | |||
3632 | "unexpected token in '.cv_func_id' directive")) | |||
3633 | return true; | |||
3634 | ||||
3635 | if (!getStreamer().EmitCVFuncIdDirective(FunctionId)) | |||
3636 | return Error(FunctionIdLoc, "function id already allocated"); | |||
3637 | ||||
3638 | return false; | |||
3639 | } | |||
3640 | ||||
3641 | /// parseDirectiveCVInlineSiteId | |||
3642 | /// ::= .cv_inline_site_id FunctionId | |||
3643 | /// "within" IAFunc | |||
3644 | /// "inlined_at" IAFile IALine [IACol] | |||
3645 | /// | |||
3646 | /// Introduces a function ID that can be used with .cv_loc. Includes "inlined | |||
3647 | /// at" source location information for use in the line table of the caller, | |||
3648 | /// whether the caller is a real function or another inlined call site. | |||
3649 | bool AsmParser::parseDirectiveCVInlineSiteId() { | |||
3650 | SMLoc FunctionIdLoc = getTok().getLoc(); | |||
3651 | int64_t FunctionId; | |||
3652 | int64_t IAFunc; | |||
3653 | int64_t IAFile; | |||
3654 | int64_t IALine; | |||
3655 | int64_t IACol = 0; | |||
3656 | ||||
3657 | // FunctionId | |||
3658 | if (parseCVFunctionId(FunctionId, ".cv_inline_site_id")) | |||
3659 | return true; | |||
3660 | ||||
3661 | // "within" | |||
3662 | if (check((getLexer().isNot(AsmToken::Identifier) || | |||
3663 | getTok().getIdentifier() != "within"), | |||
3664 | "expected 'within' identifier in '.cv_inline_site_id' directive")) | |||
3665 | return true; | |||
3666 | Lex(); | |||
3667 | ||||
3668 | // IAFunc | |||
3669 | if (parseCVFunctionId(IAFunc, ".cv_inline_site_id")) | |||
3670 | return true; | |||
3671 | ||||
3672 | // "inlined_at" | |||
3673 | if (check((getLexer().isNot(AsmToken::Identifier) || | |||
3674 | getTok().getIdentifier() != "inlined_at"), | |||
3675 | "expected 'inlined_at' identifier in '.cv_inline_site_id' " | |||
3676 | "directive") ) | |||
3677 | return true; | |||
3678 | Lex(); | |||
3679 | ||||
3680 | // IAFile IALine | |||
3681 | if (parseCVFileId(IAFile, ".cv_inline_site_id") || | |||
3682 | parseIntToken(IALine, "expected line number after 'inlined_at'")) | |||
3683 | return true; | |||
3684 | ||||
3685 | // [IACol] | |||
3686 | if (getLexer().is(AsmToken::Integer)) { | |||
3687 | IACol = getTok().getIntVal(); | |||
3688 | Lex(); | |||
3689 | } | |||
3690 | ||||
3691 | if (parseToken(AsmToken::EndOfStatement, | |||
3692 | "unexpected token in '.cv_inline_site_id' directive")) | |||
3693 | return true; | |||
3694 | ||||
3695 | if (!getStreamer().EmitCVInlineSiteIdDirective(FunctionId, IAFunc, IAFile, | |||
3696 | IALine, IACol, FunctionIdLoc)) | |||
3697 | return Error(FunctionIdLoc, "function id already allocated"); | |||
3698 | ||||
3699 | return false; | |||
3700 | } | |||
3701 | ||||
3702 | /// parseDirectiveCVLoc | |||
3703 | /// ::= .cv_loc FunctionId FileNumber [LineNumber] [ColumnPos] [prologue_end] | |||
3704 | /// [is_stmt VALUE] | |||
3705 | /// The first number is a file number, must have been previously assigned with | |||
3706 | /// a .file directive, the second number is the line number and optionally the | |||
3707 | /// third number is a column position (zero if not specified). The remaining | |||
3708 | /// optional items are .loc sub-directives. | |||
3709 | bool AsmParser::parseDirectiveCVLoc() { | |||
3710 | SMLoc DirectiveLoc = getTok().getLoc(); | |||
3711 | int64_t FunctionId, FileNumber; | |||
3712 | if (parseCVFunctionId(FunctionId, ".cv_loc") || | |||
3713 | parseCVFileId(FileNumber, ".cv_loc")) | |||
3714 | return true; | |||
3715 | ||||
3716 | int64_t LineNumber = 0; | |||
3717 | if (getLexer().is(AsmToken::Integer)) { | |||
3718 | LineNumber = getTok().getIntVal(); | |||
3719 | if (LineNumber < 0) | |||
3720 | return TokError("line number less than zero in '.cv_loc' directive"); | |||
3721 | Lex(); | |||
3722 | } | |||
3723 | ||||
3724 | int64_t ColumnPos = 0; | |||
3725 | if (getLexer().is(AsmToken::Integer)) { | |||
3726 | ColumnPos = getTok().getIntVal(); | |||
3727 | if (ColumnPos < 0) | |||
3728 | return TokError("column position less than zero in '.cv_loc' directive"); | |||
3729 | Lex(); | |||
3730 | } | |||
3731 | ||||
3732 | bool PrologueEnd = false; | |||
3733 | uint64_t IsStmt = 0; | |||
3734 | ||||
3735 | auto parseOp = [&]() -> bool { | |||
3736 | StringRef Name; | |||
3737 | SMLoc Loc = getTok().getLoc(); | |||
3738 | if (parseIdentifier(Name)) | |||
3739 | return TokError("unexpected token in '.cv_loc' directive"); | |||
3740 | if (Name == "prologue_end") | |||
3741 | PrologueEnd = true; | |||
3742 | else if (Name == "is_stmt") { | |||
3743 | Loc = getTok().getLoc(); | |||
3744 | const MCExpr *Value; | |||
3745 | if (parseExpression(Value)) | |||
3746 | return true; | |||
3747 | // The expression must be the constant 0 or 1. | |||
3748 | IsStmt = ~0ULL; | |||
3749 | if (const auto *MCE = dyn_cast<MCConstantExpr>(Value)) | |||
3750 | IsStmt = MCE->getValue(); | |||
3751 | ||||
3752 | if (IsStmt > 1) | |||
3753 | return Error(Loc, "is_stmt value not 0 or 1"); | |||
3754 | } else { | |||
3755 | return Error(Loc, "unknown sub-directive in '.cv_loc' directive"); | |||
3756 | } | |||
3757 | return false; | |||
3758 | }; | |||
3759 | ||||
3760 | if (parseMany(parseOp, false /*hasComma*/)) | |||
3761 | return true; | |||
3762 | ||||
3763 | getStreamer().EmitCVLocDirective(FunctionId, FileNumber, LineNumber, | |||
3764 | ColumnPos, PrologueEnd, IsStmt, StringRef(), | |||
3765 | DirectiveLoc); | |||
3766 | return false; | |||
3767 | } | |||
3768 | ||||
3769 | /// parseDirectiveCVLinetable | |||
3770 | /// ::= .cv_linetable FunctionId, FnStart, FnEnd | |||
3771 | bool AsmParser::parseDirectiveCVLinetable() { | |||
3772 | int64_t FunctionId; | |||
3773 | StringRef FnStartName, FnEndName; | |||
3774 | SMLoc Loc = getTok().getLoc(); | |||
3775 | if (parseCVFunctionId(FunctionId, ".cv_linetable") || | |||
3776 | parseToken(AsmToken::Comma, | |||
3777 | "unexpected token in '.cv_linetable' directive") || | |||
3778 | parseTokenLoc(Loc) || check(parseIdentifier(FnStartName), Loc, | |||
3779 | "expected identifier in directive") || | |||
3780 | parseToken(AsmToken::Comma, | |||
3781 | "unexpected token in '.cv_linetable' directive") || | |||
3782 | parseTokenLoc(Loc) || check(parseIdentifier(FnEndName), Loc, | |||
3783 | "expected identifier in directive")) | |||
3784 | return true; | |||
3785 | ||||
3786 | MCSymbol *FnStartSym = getContext().getOrCreateSymbol(FnStartName); | |||
3787 | MCSymbol *FnEndSym = getContext().getOrCreateSymbol(FnEndName); | |||
3788 | ||||
3789 | getStreamer().EmitCVLinetableDirective(FunctionId, FnStartSym, FnEndSym); | |||
3790 | return false; | |||
3791 | } | |||
3792 | ||||
3793 | /// parseDirectiveCVInlineLinetable | |||
3794 | /// ::= .cv_inline_linetable PrimaryFunctionId FileId LineNum FnStart FnEnd | |||
3795 | bool AsmParser::parseDirectiveCVInlineLinetable() { | |||
3796 | int64_t PrimaryFunctionId, SourceFileId, SourceLineNum; | |||
3797 | StringRef FnStartName, FnEndName; | |||
3798 | SMLoc Loc = getTok().getLoc(); | |||
3799 | if (parseCVFunctionId(PrimaryFunctionId, ".cv_inline_linetable") || | |||
3800 | parseTokenLoc(Loc) || | |||
3801 | parseIntToken( | |||
3802 | SourceFileId, | |||
3803 | "expected SourceField in '.cv_inline_linetable' directive") || | |||
3804 | check(SourceFileId <= 0, Loc, | |||
3805 | "File id less than zero in '.cv_inline_linetable' directive") || | |||
3806 | parseTokenLoc(Loc) || | |||
3807 | parseIntToken( | |||
3808 | SourceLineNum, | |||
3809 | "expected SourceLineNum in '.cv_inline_linetable' directive") || | |||
3810 | check(SourceLineNum < 0, Loc, | |||
3811 | "Line number less than zero in '.cv_inline_linetable' directive") || | |||
3812 | parseTokenLoc(Loc) || check(parseIdentifier(FnStartName), Loc, | |||
3813 | "expected identifier in directive") || | |||
3814 | parseTokenLoc(Loc) || check(parseIdentifier(FnEndName), Loc, | |||
3815 | "expected identifier in directive")) | |||
3816 | return true; | |||
3817 | ||||
3818 | if (parseToken(AsmToken::EndOfStatement, "Expected End of Statement")) | |||
3819 | return true; | |||
3820 | ||||
3821 | MCSymbol *FnStartSym = getContext().getOrCreateSymbol(FnStartName); | |||
3822 | MCSymbol *FnEndSym = getContext().getOrCreateSymbol(FnEndName); | |||
3823 | getStreamer().EmitCVInlineLinetableDirective(PrimaryFunctionId, SourceFileId, | |||
3824 | SourceLineNum, FnStartSym, | |||
3825 | FnEndSym); | |||
3826 | return false; | |||
3827 | } | |||
3828 | ||||
3829 | /// parseDirectiveCVDefRange | |||
3830 | /// ::= .cv_def_range RangeStart RangeEnd (GapStart GapEnd)*, bytes* | |||
3831 | bool AsmParser::parseDirectiveCVDefRange() { | |||
3832 | SMLoc Loc; | |||
3833 | std::vector<std::pair<const MCSymbol *, const MCSymbol *>> Ranges; | |||
3834 | while (getLexer().is(AsmToken::Identifier)) { | |||
3835 | Loc = getLexer().getLoc(); | |||
3836 | StringRef GapStartName; | |||
3837 | if (parseIdentifier(GapStartName)) | |||
3838 | return Error(Loc, "expected identifier in directive"); | |||
3839 | MCSymbol *GapStartSym = getContext().getOrCreateSymbol(GapStartName); | |||
3840 | ||||
3841 | Loc = getLexer().getLoc(); | |||
3842 | StringRef GapEndName; | |||
3843 | if (parseIdentifier(GapEndName)) | |||
3844 | return Error(Loc, "expected identifier in directive"); | |||
3845 | MCSymbol *GapEndSym = getContext().getOrCreateSymbol(GapEndName); | |||
3846 | ||||
3847 | Ranges.push_back({GapStartSym, GapEndSym}); | |||
3848 | } | |||
3849 | ||||
3850 | std::string FixedSizePortion; | |||
3851 | if (parseToken(AsmToken::Comma, "unexpected token in directive") || | |||
3852 | parseEscapedString(FixedSizePortion)) | |||
3853 | return true; | |||
3854 | ||||
3855 | getStreamer().EmitCVDefRangeDirective(Ranges, FixedSizePortion); | |||
3856 | return false; | |||
3857 | } | |||
3858 | ||||
3859 | /// parseDirectiveCVString | |||
3860 | /// ::= .cv_stringtable "string" | |||
3861 | bool AsmParser::parseDirectiveCVString() { | |||
3862 | std::string Data; | |||
3863 | if (checkForValidSection() || parseEscapedString(Data)) | |||
3864 | return addErrorSuffix(" in '.cv_string' directive"); | |||
3865 | ||||
3866 | // Put the string in the table and emit the offset. | |||
3867 | std::pair<StringRef, unsigned> Insertion = | |||
3868 | getCVContext().addToStringTable(Data); | |||
3869 | getStreamer().EmitIntValue(Insertion.second, 4); | |||
3870 | return false; | |||
3871 | } | |||
3872 | ||||
3873 | /// parseDirectiveCVStringTable | |||
3874 | /// ::= .cv_stringtable | |||
3875 | bool AsmParser::parseDirectiveCVStringTable() { | |||
3876 | getStreamer().EmitCVStringTableDirective(); | |||
3877 | return false; | |||
3878 | } | |||
3879 | ||||
3880 | /// parseDirectiveCVFileChecksums | |||
3881 | /// ::= .cv_filechecksums | |||
3882 | bool AsmParser::parseDirectiveCVFileChecksums() { | |||
3883 | getStreamer().EmitCVFileChecksumsDirective(); | |||
3884 | return false; | |||
3885 | } | |||
3886 | ||||
3887 | /// parseDirectiveCVFileChecksumOffset | |||
3888 | /// ::= .cv_filechecksumoffset fileno | |||
3889 | bool AsmParser::parseDirectiveCVFileChecksumOffset() { | |||
3890 | int64_t FileNo; | |||
3891 | if (parseIntToken(FileNo, "expected identifier in directive")) | |||
3892 | return true; | |||
3893 | if (parseToken(AsmToken::EndOfStatement, "Expected End of Statement")) | |||
3894 | return true; | |||
3895 | getStreamer().EmitCVFileChecksumOffsetDirective(FileNo); | |||
3896 | return false; | |||
3897 | } | |||
3898 | ||||
3899 | /// parseDirectiveCVFPOData | |||
3900 | /// ::= .cv_fpo_data procsym | |||
3901 | bool AsmParser::parseDirectiveCVFPOData() { | |||
3902 | SMLoc DirLoc = getLexer().getLoc(); | |||
3903 | StringRef ProcName; | |||
3904 | if (parseIdentifier(ProcName)) | |||
3905 | return TokError("expected symbol name"); | |||
3906 | if (parseEOL("unexpected tokens")) | |||
3907 | return addErrorSuffix(" in '.cv_fpo_data' directive"); | |||
3908 | MCSymbol *ProcSym = getContext().getOrCreateSymbol(ProcName); | |||
3909 | getStreamer().EmitCVFPOData(ProcSym, DirLoc); | |||
3910 | return false; | |||
3911 | } | |||
3912 | ||||
3913 | /// parseDirectiveCFISections | |||
3914 | /// ::= .cfi_sections section [, section] | |||
3915 | bool AsmParser::parseDirectiveCFISections() { | |||
3916 | StringRef Name; | |||
3917 | bool EH = false; | |||
3918 | bool Debug = false; | |||
3919 | ||||
3920 | if (parseIdentifier(Name)) | |||
3921 | return TokError("Expected an identifier"); | |||
3922 | ||||
3923 | if (Name == ".eh_frame") | |||
3924 | EH = true; | |||
3925 | else if (Name == ".debug_frame") | |||
3926 | Debug = true; | |||
3927 | ||||
3928 | if (getLexer().is(AsmToken::Comma)) { | |||
3929 | Lex(); | |||
3930 | ||||
3931 | if (parseIdentifier(Name)) | |||
3932 | return TokError("Expected an identifier"); | |||
3933 | ||||
3934 | if (Name == ".eh_frame") | |||
3935 | EH = true; | |||
3936 | else if (Name == ".debug_frame") | |||
3937 | Debug = true; | |||
3938 | } | |||
3939 | ||||
3940 | getStreamer().EmitCFISections(EH, Debug); | |||
3941 | return false; | |||
3942 | } | |||
3943 | ||||
3944 | /// parseDirectiveCFIStartProc | |||
3945 | /// ::= .cfi_startproc [simple] | |||
3946 | bool AsmParser::parseDirectiveCFIStartProc() { | |||
3947 | StringRef Simple; | |||
3948 | if (!parseOptionalToken(AsmToken::EndOfStatement)) { | |||
3949 | if (check(parseIdentifier(Simple) || Simple != "simple", | |||
3950 | "unexpected token") || | |||
3951 | parseToken(AsmToken::EndOfStatement)) | |||
3952 | return addErrorSuffix(" in '.cfi_startproc' directive"); | |||
3953 | } | |||
3954 | ||||
3955 | // TODO(kristina): Deal with a corner case of incorrect diagnostic context | |||
3956 | // being produced if this directive is emitted as part of preprocessor macro | |||
3957 | // expansion which can *ONLY* happen if Clang's cc1as is the API consumer. | |||
3958 | // Tools like llvm-mc on the other hand are not affected by it, and report | |||
3959 | // correct context information. | |||
3960 | getStreamer().EmitCFIStartProc(!Simple.empty(), Lexer.getLoc()); | |||
3961 | return false; | |||
3962 | } | |||
3963 | ||||
3964 | /// parseDirectiveCFIEndProc | |||
3965 | /// ::= .cfi_endproc | |||
3966 | bool AsmParser::parseDirectiveCFIEndProc() { | |||
3967 | getStreamer().EmitCFIEndProc(); | |||
3968 | return false; | |||
3969 | } | |||
3970 | ||||
3971 | /// parse register name or number. | |||
3972 | bool AsmParser::parseRegisterOrRegisterNumber(int64_t &Register, | |||
3973 | SMLoc DirectiveLoc) { | |||
3974 | unsigned RegNo; | |||
3975 | ||||
3976 | if (getLexer().isNot(AsmToken::Integer)) { | |||
3977 | if (getTargetParser().ParseRegister(RegNo, DirectiveLoc, DirectiveLoc)) | |||
3978 | return true; | |||
3979 | Register = getContext().getRegisterInfo()->getDwarfRegNum(RegNo, true); | |||
3980 | } else | |||
3981 | return parseAbsoluteExpression(Register); | |||
3982 | ||||
3983 | return false; | |||
3984 | } | |||
3985 | ||||
3986 | /// parseDirectiveCFIDefCfa | |||
3987 | /// ::= .cfi_def_cfa register, offset | |||
3988 | bool AsmParser::parseDirectiveCFIDefCfa(SMLoc DirectiveLoc) { | |||
3989 | int64_t Register = 0, Offset = 0; | |||
3990 | if (parseRegisterOrRegisterNumber(Register, DirectiveLoc) || | |||
3991 | parseToken(AsmToken::Comma, "unexpected token in directive") || | |||
3992 | parseAbsoluteExpression(Offset)) | |||
3993 | return true; | |||
3994 | ||||
3995 | getStreamer().EmitCFIDefCfa(Register, Offset); | |||
3996 | return false; | |||
3997 | } | |||
3998 | ||||
3999 | /// parseDirectiveCFIDefCfaOffset | |||
4000 | /// ::= .cfi_def_cfa_offset offset | |||
4001 | bool AsmParser::parseDirectiveCFIDefCfaOffset() { | |||
4002 | int64_t Offset = 0; | |||
4003 | if (parseAbsoluteExpression(Offset)) | |||
4004 | return true; | |||
4005 | ||||
4006 | getStreamer().EmitCFIDefCfaOffset(Offset); | |||
4007 | return false; | |||
4008 | } | |||
4009 | ||||
4010 | /// parseDirectiveCFIRegister | |||
4011 | /// ::= .cfi_register register, register | |||
4012 | bool AsmParser::parseDirectiveCFIRegister(SMLoc DirectiveLoc) { | |||
4013 | int64_t Register1 = 0, Register2 = 0; | |||
4014 | if (parseRegisterOrRegisterNumber(Register1, DirectiveLoc) || | |||
4015 | parseToken(AsmToken::Comma, "unexpected token in directive") || | |||
4016 | parseRegisterOrRegisterNumber(Register2, DirectiveLoc)) | |||
4017 | return true; | |||
4018 | ||||
4019 | getStreamer().EmitCFIRegister(Register1, Register2); | |||
4020 | return false; | |||
4021 | } | |||
4022 | ||||
4023 | /// parseDirectiveCFIWindowSave | |||
4024 | /// ::= .cfi_window_save | |||
4025 | bool AsmParser::parseDirectiveCFIWindowSave() { | |||
4026 | getStreamer().EmitCFIWindowSave(); | |||
4027 | return false; | |||
4028 | } | |||
4029 | ||||
4030 | /// parseDirectiveCFIAdjustCfaOffset | |||
4031 | /// ::= .cfi_adjust_cfa_offset adjustment | |||
4032 | bool AsmParser::parseDirectiveCFIAdjustCfaOffset() { | |||
4033 | int64_t Adjustment = 0; | |||
4034 | if (parseAbsoluteExpression(Adjustment)) | |||
4035 | return true; | |||
4036 | ||||
4037 | getStreamer().EmitCFIAdjustCfaOffset(Adjustment); | |||
4038 | return false; | |||
4039 | } | |||
4040 | ||||
4041 | /// parseDirectiveCFIDefCfaRegister | |||
4042 | /// ::= .cfi_def_cfa_register register | |||
4043 | bool AsmParser::parseDirectiveCFIDefCfaRegister(SMLoc DirectiveLoc) { | |||
4044 | int64_t Register = 0; | |||
4045 | if (parseRegisterOrRegisterNumber(Register, DirectiveLoc)) | |||
4046 | return true; | |||
4047 | ||||
4048 | getStreamer().EmitCFIDefCfaRegister(Register); | |||
4049 | return false; | |||
4050 | } | |||
4051 | ||||
4052 | /// parseDirectiveCFIOffset | |||
4053 | /// ::= .cfi_offset register, offset | |||
4054 | bool AsmParser::parseDirectiveCFIOffset(SMLoc DirectiveLoc) { | |||
4055 | int64_t Register = 0; | |||
4056 | int64_t Offset = 0; | |||
4057 | ||||
4058 | if (parseRegisterOrRegisterNumber(Register, DirectiveLoc) || | |||
4059 | parseToken(AsmToken::Comma, "unexpected token in directive") || | |||
4060 | parseAbsoluteExpression(Offset)) | |||
4061 | return true; | |||
4062 | ||||
4063 | getStreamer().EmitCFIOffset(Register, Offset); | |||
4064 | return false; | |||
4065 | } | |||
4066 | ||||
4067 | /// parseDirectiveCFIRelOffset | |||
4068 | /// ::= .cfi_rel_offset register, offset | |||
4069 | bool AsmParser::parseDirectiveCFIRelOffset(SMLoc DirectiveLoc) { | |||
4070 | int64_t Register = 0, Offset = 0; | |||
4071 | ||||
4072 | if (parseRegisterOrRegisterNumber(Register, DirectiveLoc) || | |||
4073 | parseToken(AsmToken::Comma, "unexpected token in directive") || | |||
4074 | parseAbsoluteExpression(Offset)) | |||
4075 | return true; | |||
4076 | ||||
4077 | getStreamer().EmitCFIRelOffset(Register, Offset); | |||
4078 | return false; | |||
4079 | } | |||
4080 | ||||
4081 | static bool isValidEncoding(int64_t Encoding) { | |||
4082 | if (Encoding & ~0xff) | |||
4083 | return false; | |||
4084 | ||||
4085 | if (Encoding == dwarf::DW_EH_PE_omit) | |||
4086 | return true; | |||
4087 | ||||
4088 | const unsigned Format = Encoding & 0xf; | |||
4089 | if (Format != dwarf::DW_EH_PE_absptr && Format != dwarf::DW_EH_PE_udata2 && | |||
4090 | Format != dwarf::DW_EH_PE_udata4 && Format != dwarf::DW_EH_PE_udata8 && | |||
4091 | Format != dwarf::DW_EH_PE_sdata2 && Format != dwarf::DW_EH_PE_sdata4 && | |||
4092 | Format != dwarf::DW_EH_PE_sdata8 && Format != dwarf::DW_EH_PE_signed) | |||
4093 | return false; | |||
4094 | ||||
4095 | const unsigned Application = Encoding & 0x70; | |||
4096 | if (Application != dwarf::DW_EH_PE_absptr && | |||
4097 | Application != dwarf::DW_EH_PE_pcrel) | |||
4098 | return false; | |||
4099 | ||||
4100 | return true; | |||
4101 | } | |||
4102 | ||||
4103 | /// parseDirectiveCFIPersonalityOrLsda | |||
4104 | /// IsPersonality true for cfi_personality, false for cfi_lsda | |||
4105 | /// ::= .cfi_personality encoding, [symbol_name] | |||
4106 | /// ::= .cfi_lsda encoding, [symbol_name] | |||
4107 | bool AsmParser::parseDirectiveCFIPersonalityOrLsda(bool IsPersonality) { | |||
4108 | int64_t Encoding = 0; | |||
4109 | if (parseAbsoluteExpression(Encoding)) | |||
4110 | return true; | |||
4111 | if (Encoding == dwarf::DW_EH_PE_omit) | |||
4112 | return false; | |||
4113 | ||||
4114 | StringRef Name; | |||
4115 | if (check(!isValidEncoding(Encoding), "unsupported encoding.") || | |||
4116 | parseToken(AsmToken::Comma, "unexpected token in directive") || | |||
4117 | check(parseIdentifier(Name), "expected identifier in directive")) | |||
4118 | return true; | |||
4119 | ||||
4120 | MCSymbol *Sym = getContext().getOrCreateSymbol(Name); | |||
4121 | ||||
4122 | if (IsPersonality) | |||
4123 | getStreamer().EmitCFIPersonality(Sym, Encoding); | |||
4124 | else | |||
4125 | getStreamer().EmitCFILsda(Sym, Encoding); | |||
4126 | return false; | |||
4127 | } | |||
4128 | ||||
4129 | /// parseDirectiveCFIRememberState | |||
4130 | /// ::= .cfi_remember_state | |||
4131 | bool AsmParser::parseDirectiveCFIRememberState() { | |||
4132 | getStreamer().EmitCFIRememberState(); | |||
4133 | return false; | |||
4134 | } | |||
4135 | ||||
4136 | /// parseDirectiveCFIRestoreState | |||
4137 | /// ::= .cfi_remember_state | |||
4138 | bool AsmParser::parseDirectiveCFIRestoreState() { | |||
4139 | getStreamer().EmitCFIRestoreState(); | |||
4140 | return false; | |||
4141 | } | |||
4142 | ||||
4143 | /// parseDirectiveCFISameValue | |||
4144 | /// ::= .cfi_same_value register | |||
4145 | bool AsmParser::parseDirectiveCFISameValue(SMLoc DirectiveLoc) { | |||
4146 | int64_t Register = 0; | |||
4147 | ||||
4148 | if (parseRegisterOrRegisterNumber(Register, DirectiveLoc)) | |||
4149 | return true; | |||
4150 | ||||
4151 | getStreamer().EmitCFISameValue(Register); | |||
4152 | return false; | |||
4153 | } | |||
4154 | ||||
4155 | /// parseDirectiveCFIRestore | |||
4156 | /// ::= .cfi_restore register | |||
4157 | bool AsmParser::parseDirectiveCFIRestore(SMLoc DirectiveLoc) { | |||
4158 | int64_t Register = 0; | |||
4159 | if (parseRegisterOrRegisterNumber(Register, DirectiveLoc)) | |||
4160 | return true; | |||
4161 | ||||
4162 | getStreamer().EmitCFIRestore(Register); | |||
4163 | return false; | |||
4164 | } | |||
4165 | ||||
4166 | /// parseDirectiveCFIEscape | |||
4167 | /// ::= .cfi_escape expression[,...] | |||
4168 | bool AsmParser::parseDirectiveCFIEscape() { | |||
4169 | std::string Values; | |||
4170 | int64_t CurrValue; | |||
4171 | if (parseAbsoluteExpression(CurrValue)) | |||
4172 | return true; | |||
4173 | ||||
4174 | Values.push_back((uint8_t)CurrValue); | |||
4175 | ||||
4176 | while (getLexer().is(AsmToken::Comma)) { | |||
4177 | Lex(); | |||
4178 | ||||
4179 | if (parseAbsoluteExpression(CurrValue)) | |||
4180 | return true; | |||
4181 | ||||
4182 | Values.push_back((uint8_t)CurrValue); | |||
4183 | } | |||
4184 | ||||
4185 | getStreamer().EmitCFIEscape(Values); | |||
4186 | return false; | |||
4187 | } | |||
4188 | ||||
4189 | /// parseDirectiveCFIReturnColumn | |||
4190 | /// ::= .cfi_return_column register | |||
4191 | bool AsmParser::parseDirectiveCFIReturnColumn(SMLoc DirectiveLoc) { | |||
4192 | int64_t Register = 0; | |||
4193 | if (parseRegisterOrRegisterNumber(Register, DirectiveLoc)) | |||
4194 | return true; | |||
4195 | getStreamer().EmitCFIReturnColumn(Register); | |||
4196 | return false; | |||
4197 | } | |||
4198 | ||||
4199 | /// parseDirectiveCFISignalFrame | |||
4200 | /// ::= .cfi_signal_frame | |||
4201 | bool AsmParser::parseDirectiveCFISignalFrame() { | |||
4202 | if (parseToken(AsmToken::EndOfStatement, | |||
4203 | "unexpected token in '.cfi_signal_frame'")) | |||
4204 | return true; | |||
4205 | ||||
4206 | getStreamer().EmitCFISignalFrame(); | |||
4207 | return false; | |||
4208 | } | |||
4209 | ||||
4210 | /// parseDirectiveCFIUndefined | |||
4211 | /// ::= .cfi_undefined register | |||
4212 | bool AsmParser::parseDirectiveCFIUndefined(SMLoc DirectiveLoc) { | |||
4213 | int64_t Register = 0; | |||
4214 | ||||
4215 | if (parseRegisterOrRegisterNumber(Register, DirectiveLoc)) | |||
4216 | return true; | |||
4217 | ||||
4218 | getStreamer().EmitCFIUndefined(Register); | |||
4219 | return false; | |||
4220 | } | |||
4221 | ||||
4222 | /// parseDirectiveAltmacro | |||
4223 | /// ::= .altmacro | |||
4224 | /// ::= .noaltmacro | |||
4225 | bool AsmParser::parseDirectiveAltmacro(StringRef Directive) { | |||
4226 | if (getLexer().isNot(AsmToken::EndOfStatement)) | |||
4227 | return TokError("unexpected token in '" + Directive + "' directive"); | |||
4228 | AltMacroMode = (Directive == ".altmacro"); | |||
4229 | return false; | |||
4230 | } | |||
4231 | ||||
4232 | /// parseDirectiveMacrosOnOff | |||
4233 | /// ::= .macros_on | |||
4234 | /// ::= .macros_off | |||
4235 | bool AsmParser::parseDirectiveMacrosOnOff(StringRef Directive) { | |||
4236 | if (parseToken(AsmToken::EndOfStatement, | |||
4237 | "unexpected token in '" + Directive + "' directive")) | |||
4238 | return true; | |||
4239 | ||||
4240 | setMacrosEnabled(Directive == ".macros_on"); | |||
4241 | return false; | |||
4242 | } | |||
4243 | ||||
4244 | /// parseDirectiveMacro | |||
4245 | /// ::= .macro name[,] [parameters] | |||
4246 | bool AsmParser::parseDirectiveMacro(SMLoc DirectiveLoc) { | |||
4247 | StringRef Name; | |||
4248 | if (parseIdentifier(Name)) | |||
4249 | return TokError("expected identifier in '.macro' directive"); | |||
4250 | ||||
4251 | if (getLexer().is(AsmToken::Comma)) | |||
4252 | Lex(); | |||
4253 | ||||
4254 | MCAsmMacroParameters Parameters; | |||
4255 | while (getLexer().isNot(AsmToken::EndOfStatement)) { | |||
4256 | ||||
4257 | if (!Parameters.empty() && Parameters.back().Vararg) | |||
4258 | return Error(Lexer.getLoc(), | |||
4259 | "Vararg parameter '" + Parameters.back().Name + | |||
4260 | "' should be last one in the list of parameters."); | |||
4261 | ||||
4262 | MCAsmMacroParameter Parameter; | |||
4263 | if (parseIdentifier(Parameter.Name)) | |||
4264 | return TokError("expected identifier in '.macro' directive"); | |||
4265 | ||||
4266 | // Emit an error if two (or more) named parameters share the same name | |||
4267 | for (const MCAsmMacroParameter& CurrParam : Parameters) | |||
4268 | if (CurrParam.Name.equals(Parameter.Name)) | |||
4269 | return TokError("macro '" + Name + "' has multiple parameters" | |||
4270 | " named '" + Parameter.Name + "'"); | |||
4271 | ||||
4272 | if (Lexer.is(AsmToken::Colon)) { | |||
4273 | Lex(); // consume ':' | |||
4274 | ||||
4275 | SMLoc QualLoc; | |||
4276 | StringRef Qualifier; | |||
4277 | ||||
4278 | QualLoc = Lexer.getLoc(); | |||
4279 | if (parseIdentifier(Qualifier)) | |||
4280 | return Error(QualLoc, "missing parameter qualifier for " | |||
4281 | "'" + Parameter.Name + "' in macro '" + Name + "'"); | |||
4282 | ||||
4283 | if (Qualifier == "req") | |||
4284 | Parameter.Required = true; | |||
4285 | else if (Qualifier == "vararg") | |||
4286 | Parameter.Vararg = true; | |||
4287 | else | |||
4288 | return Error(QualLoc, Qualifier + " is not a valid parameter qualifier " | |||
4289 | "for '" + Parameter.Name + "' in macro '" + Name + "'"); | |||
4290 | } | |||
4291 | ||||
4292 | if (getLexer().is(AsmToken::Equal)) { | |||
4293 | Lex(); | |||
4294 | ||||
4295 | SMLoc ParamLoc; | |||
4296 | ||||
4297 | ParamLoc = Lexer.getLoc(); | |||
4298 | if (parseMacroArgument(Parameter.Value, /*Vararg=*/false )) | |||
4299 | return true; | |||
4300 | ||||
4301 | if (Parameter.Required) | |||
4302 | Warning(ParamLoc, "pointless default value for required parameter " | |||
4303 | "'" + Parameter.Name + "' in macro '" + Name + "'"); | |||
4304 | } | |||
4305 | ||||
4306 | Parameters.push_back(std::move(Parameter)); | |||
4307 | ||||
4308 | if (getLexer().is(AsmToken::Comma)) | |||
4309 | Lex(); | |||
4310 | } | |||
4311 | ||||
4312 | // Eat just the end of statement. | |||
4313 | Lexer.Lex(); | |||
4314 | ||||
4315 | // Consuming deferred text, so use Lexer.Lex to ignore Lexing Errors | |||
4316 | AsmToken EndToken, StartToken = getTok(); | |||
4317 | unsigned MacroDepth = 0; | |||
4318 | // Lex the macro definition. | |||
4319 | while (true) { | |||
4320 | // Ignore Lexing errors in macros. | |||
4321 | while (Lexer.is(AsmToken::Error)) { | |||
4322 | Lexer.Lex(); | |||
4323 | } | |||
4324 | ||||
4325 | // Check whether we have reached the end of the file. | |||
4326 | if (getLexer().is(AsmToken::Eof)) | |||
4327 | return Error(DirectiveLoc, "no matching '.endmacro' in definition"); | |||
4328 | ||||
4329 | // Otherwise, check whether we have reach the .endmacro. | |||
4330 | if (getLexer().is(AsmToken::Identifier)) { | |||
4331 | if (getTok().getIdentifier() == ".endm" || | |||
4332 | getTok().getIdentifier() == ".endmacro") { | |||
4333 | if (MacroDepth == 0) { // Outermost macro. | |||
4334 | EndToken = getTok(); | |||
4335 | Lexer.Lex(); | |||
4336 | if (getLexer().isNot(AsmToken::EndOfStatement)) | |||
4337 | return TokError("unexpected token in '" + EndToken.getIdentifier() + | |||
4338 | "' directive"); | |||
4339 | break; | |||
4340 | } else { | |||
4341 | // Otherwise we just found the end of an inner macro. | |||
4342 | --MacroDepth; | |||
4343 | } | |||
4344 | } else if (getTok().getIdentifier() == ".macro") { | |||
4345 | // We allow nested macros. Those aren't instantiated until the outermost | |||
4346 | // macro is expanded so just ignore them for now. | |||
4347 | ++MacroDepth; | |||
4348 | } | |||
4349 | } | |||
4350 | ||||
4351 | // Otherwise, scan til the end of the statement. | |||
4352 | eatToEndOfStatement(); | |||
4353 | } | |||
4354 | ||||
4355 | if (getContext().lookupMacro(Name)) { | |||
4356 | return Error(DirectiveLoc, "macro '" + Name + "' is already defined"); | |||
4357 | } | |||
4358 | ||||
4359 | const char *BodyStart = StartToken.getLoc().getPointer(); | |||
4360 | const char *BodyEnd = EndToken.getLoc().getPointer(); | |||
4361 | StringRef Body = StringRef(BodyStart, BodyEnd - BodyStart); | |||
4362 | checkForBadMacro(DirectiveLoc, Name, Body, Parameters); | |||
4363 | MCAsmMacro Macro(Name, Body, std::move(Parameters)); | |||
4364 | 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) | |||
4365 | Macro.dump())do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("asm-macros")) { dbgs() << "Defining new macro:\n"; Macro .dump(); } } while (false); | |||
4366 | getContext().defineMacro(Name, std::move(Macro)); | |||
4367 | return false; | |||
4368 | } | |||
4369 | ||||
4370 | /// checkForBadMacro | |||
4371 | /// | |||
4372 | /// With the support added for named parameters there may be code out there that | |||
4373 | /// is transitioning from positional parameters. In versions of gas that did | |||
4374 | /// not support named parameters they would be ignored on the macro definition. | |||
4375 | /// But to support both styles of parameters this is not possible so if a macro | |||
4376 | /// definition has named parameters but does not use them and has what appears | |||
4377 | /// to be positional parameters, strings like $1, $2, ... and $n, then issue a | |||
4378 | /// warning that the positional parameter found in body which have no effect. | |||
4379 | /// Hoping the developer will either remove the named parameters from the macro | |||
4380 | /// definition so the positional parameters get used if that was what was | |||
4381 | /// intended or change the macro to use the named parameters. It is possible | |||
4382 | /// this warning will trigger when the none of the named parameters are used | |||
4383 | /// and the strings like $1 are infact to simply to be passed trough unchanged. | |||
4384 | void AsmParser::checkForBadMacro(SMLoc DirectiveLoc, StringRef Name, | |||
4385 | StringRef Body, | |||
4386 | ArrayRef<MCAsmMacroParameter> Parameters) { | |||
4387 | // If this macro is not defined with named parameters the warning we are | |||
4388 | // checking for here doesn't apply. | |||
4389 | unsigned NParameters = Parameters.size(); | |||
4390 | if (NParameters == 0) | |||
4391 | return; | |||
4392 | ||||
4393 | bool NamedParametersFound = false; | |||
4394 | bool PositionalParametersFound = false; | |||
4395 | ||||
4396 | // Look at the body of the macro for use of both the named parameters and what | |||
4397 | // are likely to be positional parameters. This is what expandMacro() is | |||
4398 | // doing when it finds the parameters in the body. | |||
4399 | while (!Body.empty()) { | |||
4400 | // Scan for the next possible parameter. | |||
4401 | std::size_t End = Body.size(), Pos = 0; | |||
4402 | for (; Pos != End; ++Pos) { | |||
4403 | // Check for a substitution or escape. | |||
4404 | // This macro is defined with parameters, look for \foo, \bar, etc. | |||
4405 | if (Body[Pos] == '\\' && Pos + 1 != End) | |||
4406 | break; | |||
4407 | ||||
4408 | // This macro should have parameters, but look for $0, $1, ..., $n too. | |||
4409 | if (Body[Pos] != '$' || Pos + 1 == End) | |||
4410 | continue; | |||
4411 | char Next = Body[Pos + 1]; | |||
4412 | if (Next == '$' || Next == 'n' || | |||
4413 | isdigit(static_cast<unsigned char>(Next))) | |||
4414 | break; | |||
4415 | } | |||
4416 | ||||
4417 | // Check if we reached the end. | |||
4418 | if (Pos == End) | |||
4419 | break; | |||
4420 | ||||
4421 | if (Body[Pos] == '$') { | |||
4422 | switch (Body[Pos + 1]) { | |||
4423 | // $$ => $ | |||
4424 | case '$': | |||
4425 | break; | |||
4426 | ||||
4427 | // $n => number of arguments | |||
4428 | case 'n': | |||
4429 | PositionalParametersFound = true; | |||
4430 | break; | |||
4431 | ||||
4432 | // $[0-9] => argument | |||
4433 | default: { | |||
4434 | PositionalParametersFound = true; | |||
4435 | break; | |||
4436 | } | |||
4437 | } | |||
4438 | Pos += 2; | |||
4439 | } else { | |||
4440 | unsigned I = Pos + 1; | |||
4441 | while (isIdentifierChar(Body[I]) && I + 1 != End) | |||
4442 | ++I; | |||
4443 | ||||
4444 | const char *Begin = Body.data() + Pos + 1; | |||
4445 | StringRef Argument(Begin, I - (Pos + 1)); | |||
4446 | unsigned Index = 0; | |||
4447 | for (; Index < NParameters; ++Index) | |||
4448 | if (Parameters[Index].Name == Argument) | |||
4449 | break; | |||
4450 | ||||
4451 | if (Index == NParameters) { | |||
4452 | if (Body[Pos + 1] == '(' && Body[Pos + 2] == ')') | |||
4453 | Pos += 3; | |||
4454 | else { | |||
4455 | Pos = I; | |||
4456 | } | |||
4457 | } else { | |||
4458 | NamedParametersFound = true; | |||
4459 | Pos += 1 + Argument.size(); | |||
4460 | } | |||
4461 | } | |||
4462 | // Update the scan point. | |||
4463 | Body = Body.substr(Pos); | |||
4464 | } | |||
4465 | ||||
4466 | if (!NamedParametersFound && PositionalParametersFound) | |||
4467 | Warning(DirectiveLoc, "macro defined with named parameters which are not " | |||
4468 | "used in macro body, possible positional parameter " | |||
4469 | "found in body which will have no effect"); | |||
4470 | } | |||
4471 | ||||
4472 | /// parseDirectiveExitMacro | |||
4473 | /// ::= .exitm | |||
4474 | bool AsmParser::parseDirectiveExitMacro(StringRef Directive) { | |||
4475 | if (parseToken(AsmToken::EndOfStatement, | |||
4476 | "unexpected token in '" + Directive + "' directive")) | |||
4477 | return true; | |||
4478 | ||||
4479 | if (!isInsideMacroInstantiation()) | |||
4480 | return TokError("unexpected '" + Directive + "' in file, " | |||
4481 | "no current macro definition"); | |||
4482 | ||||
4483 | // Exit all conditionals that are active in the current macro. | |||
4484 | while (TheCondStack.size() != ActiveMacros.back()->CondStackDepth) { | |||
4485 | TheCondState = TheCondStack.back(); | |||
4486 | TheCondStack.pop_back(); | |||
4487 | } | |||
4488 | ||||
4489 | handleMacroExit(); | |||
4490 | return false; | |||
4491 | } | |||
4492 | ||||
4493 | /// parseDirectiveEndMacro | |||
4494 | /// ::= .endm | |||
4495 | /// ::= .endmacro | |||
4496 | bool AsmParser::parseDirectiveEndMacro(StringRef Directive) { | |||
4497 | if (getLexer().isNot(AsmToken::EndOfStatement)) | |||
4498 | return TokError("unexpected token in '" + Directive + "' directive"); | |||
4499 | ||||
4500 | // If we are inside a macro instantiation, terminate the current | |||
4501 | // instantiation. | |||
4502 | if (isInsideMacroInstantiation()) { | |||
4503 | handleMacroExit(); | |||
4504 | return false; | |||
4505 | } | |||
4506 | ||||
4507 | // Otherwise, this .endmacro is a stray entry in the file; well formed | |||
4508 | // .endmacro directives are handled during the macro definition parsing. | |||
4509 | return TokError("unexpected '" + Directive + "' in file, " | |||
4510 | "no current macro definition"); | |||
4511 | } | |||
4512 | ||||
4513 | /// parseDirectivePurgeMacro | |||
4514 | /// ::= .purgem | |||
4515 | bool AsmParser::parseDirectivePurgeMacro(SMLoc DirectiveLoc) { | |||
4516 | StringRef Name; | |||
4517 | SMLoc Loc; | |||
4518 | if (parseTokenLoc(Loc) || | |||
4519 | check(parseIdentifier(Name), Loc, | |||
4520 | "expected identifier in '.purgem' directive") || | |||
4521 | parseToken(AsmToken::EndOfStatement, | |||
4522 | "unexpected token in '.purgem' directive")) | |||
4523 | return true; | |||
4524 | ||||
4525 | if (!getContext().lookupMacro(Name)) | |||
4526 | return Error(DirectiveLoc, "macro '" + Name + "' is not defined"); | |||
4527 | ||||
4528 | getContext().undefineMacro(Name); | |||
4529 | DEBUG_WITH_TYPE("asm-macros", dbgs()do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("asm-macros")) { dbgs() << "Un-defining macro: " << Name << "\n"; } } while (false) | |||
4530 | << "Un-defining macro: " << Name << "\n")do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("asm-macros")) { dbgs() << "Un-defining macro: " << Name << "\n"; } } while (false); | |||
4531 | return false; | |||
4532 | } | |||
4533 | ||||
4534 | /// parseDirectiveBundleAlignMode | |||
4535 | /// ::= {.bundle_align_mode} expression | |||
4536 | bool AsmParser::parseDirectiveBundleAlignMode() { | |||
4537 | // Expect a single argument: an expression that evaluates to a constant | |||
4538 | // in the inclusive range 0-30. | |||
4539 | SMLoc ExprLoc = getLexer().getLoc(); | |||
4540 | int64_t AlignSizePow2; | |||
4541 | if (checkForValidSection() || parseAbsoluteExpression(AlignSizePow2) || | |||
4542 | parseToken(AsmToken::EndOfStatement, "unexpected token after expression " | |||
4543 | "in '.bundle_align_mode' " | |||
4544 | "directive") || | |||
4545 | check(AlignSizePow2 < 0 || AlignSizePow2 > 30, ExprLoc, | |||
4546 | "invalid bundle alignment size (expected between 0 and 30)")) | |||
4547 | return true; | |||
4548 | ||||
4549 | // Because of AlignSizePow2's verified range we can safely truncate it to | |||
4550 | // unsigned. | |||
4551 | getStreamer().EmitBundleAlignMode(static_cast<unsigned>(AlignSizePow2)); | |||
4552 | return false; | |||
4553 | } | |||
4554 | ||||
4555 | /// parseDirectiveBundleLock | |||
4556 | /// ::= {.bundle_lock} [align_to_end] | |||
4557 | bool AsmParser::parseDirectiveBundleLock() { | |||
4558 | if (checkForValidSection()) | |||
4559 | return true; | |||
4560 | bool AlignToEnd = false; | |||
4561 | ||||
4562 | StringRef Option; | |||
4563 | SMLoc Loc = getTok().getLoc(); | |||
4564 | const char *kInvalidOptionError = | |||
4565 | "invalid option for '.bundle_lock' directive"; | |||
4566 | ||||
4567 | if (!parseOptionalToken(AsmToken::EndOfStatement)) { | |||
4568 | if (check(parseIdentifier(Option), Loc, kInvalidOptionError) || | |||
4569 | check(Option != "align_to_end", Loc, kInvalidOptionError) || | |||
4570 | parseToken(AsmToken::EndOfStatement, | |||
4571 | "unexpected token after '.bundle_lock' directive option")) | |||
4572 | return true; | |||
4573 | AlignToEnd = true; | |||
4574 | } | |||
4575 | ||||
4576 | getStreamer().EmitBundleLock(AlignToEnd); | |||
4577 | return false; | |||
4578 | } | |||
4579 | ||||
4580 | /// parseDirectiveBundleLock | |||
4581 | /// ::= {.bundle_lock} | |||
4582 | bool AsmParser::parseDirectiveBundleUnlock() { | |||
4583 | if (checkForValidSection() || | |||
4584 | parseToken(AsmToken::EndOfStatement, | |||
4585 | "unexpected token in '.bundle_unlock' directive")) | |||
4586 | return true; | |||
4587 | ||||
4588 | getStreamer().EmitBundleUnlock(); | |||
4589 | return false; | |||
4590 | } | |||
4591 | ||||
4592 | /// parseDirectiveSpace | |||
4593 | /// ::= (.skip | .space) expression [ , expression ] | |||
4594 | bool AsmParser::parseDirectiveSpace(StringRef IDVal) { | |||
4595 | SMLoc NumBytesLoc = Lexer.getLoc(); | |||
4596 | const MCExpr *NumBytes; | |||
4597 | if (checkForValidSection() || parseExpression(NumBytes)) | |||
4598 | return true; | |||
4599 | ||||
4600 | int64_t FillExpr = 0; | |||
4601 | if (parseOptionalToken(AsmToken::Comma)) | |||
4602 | if (parseAbsoluteExpression(FillExpr)) | |||
4603 | return addErrorSuffix("in '" + Twine(IDVal) + "' directive"); | |||
4604 | if (parseToken(AsmToken::EndOfStatement)) | |||
4605 | return addErrorSuffix("in '" + Twine(IDVal) + "' directive"); | |||
4606 | ||||
4607 | // FIXME: Sometimes the fill expr is 'nop' if it isn't supplied, instead of 0. | |||
4608 | getStreamer().emitFill(*NumBytes, FillExpr, NumBytesLoc); | |||
4609 | ||||
4610 | return false; | |||
4611 | } | |||
4612 | ||||
4613 | /// parseDirectiveDCB | |||
4614 | /// ::= .dcb.{b, l, w} expression, expression | |||
4615 | bool AsmParser::parseDirectiveDCB(StringRef IDVal, unsigned Size) { | |||
4616 | SMLoc NumValuesLoc = Lexer.getLoc(); | |||
4617 | int64_t NumValues; | |||
4618 | if (checkForValidSection() || parseAbsoluteExpression(NumValues)) | |||
4619 | return true; | |||
4620 | ||||
4621 | if (NumValues < 0) { | |||
4622 | Warning(NumValuesLoc, "'" + Twine(IDVal) + "' directive with negative repeat count has no effect"); | |||
4623 | return false; | |||
4624 | } | |||
4625 | ||||
4626 | if (parseToken(AsmToken::Comma, | |||
4627 | "unexpected token in '" + Twine(IDVal) + "' directive")) | |||
4628 | return true; | |||
4629 | ||||
4630 | const MCExpr *Value; | |||
4631 | SMLoc ExprLoc = getLexer().getLoc(); | |||
4632 | if (parseExpression(Value)) | |||
4633 | return true; | |||
4634 | ||||
4635 | // Special case constant expressions to match code generator. | |||
4636 | if (const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Value)) { | |||
4637 | assert(Size <= 8 && "Invalid size")((Size <= 8 && "Invalid size") ? static_cast<void > (0) : __assert_fail ("Size <= 8 && \"Invalid size\"" , "/build/llvm-toolchain-snapshot-9~svn362543/lib/MC/MCParser/AsmParser.cpp" , 4637, __PRETTY_FUNCTION__)); | |||
4638 | uint64_t IntValue = MCE->getValue(); | |||
4639 | if (!isUIntN(8 * Size, IntValue) && !isIntN(8 * Size, IntValue)) | |||
4640 | return Error(ExprLoc, "literal value out of range for directive"); | |||
4641 | for (uint64_t i = 0, e = NumValues; i != e; ++i) | |||
4642 | getStreamer().EmitIntValue(IntValue, Size); | |||
4643 | } else { | |||
4644 | for (uint64_t i = 0, e = NumValues; i != e; ++i) | |||
4645 | getStreamer().EmitValue(Value, Size, ExprLoc); | |||
4646 | } | |||
4647 | ||||
4648 | if (parseToken(AsmToken::EndOfStatement, | |||
4649 | "unexpected token in '" + Twine(IDVal) + "' directive")) | |||
4650 | return true; | |||
4651 | ||||
4652 | return false; | |||
4653 | } | |||
4654 | ||||
4655 | /// parseDirectiveRealDCB | |||
4656 | /// ::= .dcb.{d, s} expression, expression | |||
4657 | bool AsmParser::parseDirectiveRealDCB(StringRef IDVal, const fltSemantics &Semantics) { | |||
4658 | SMLoc NumValuesLoc = Lexer.getLoc(); | |||
4659 | int64_t NumValues; | |||
4660 | if (checkForValidSection() || parseAbsoluteExpression(NumValues)) | |||
4661 | return true; | |||
4662 | ||||
4663 | if (NumValues < 0) { | |||
4664 | Warning(NumValuesLoc, "'" + Twine(IDVal) + "' directive with negative repeat count has no effect"); | |||
4665 | return false; | |||
4666 | } | |||
4667 | ||||
4668 | if (parseToken(AsmToken::Comma, | |||
4669 | "unexpected token in '" + Twine(IDVal) + "' directive")) | |||
4670 | return true; | |||
4671 | ||||
4672 | APInt AsInt; | |||
4673 | if (parseRealValue(Semantics, AsInt)) | |||
4674 | return true; | |||
4675 | ||||
4676 | if (parseToken(AsmToken::EndOfStatement, | |||
4677 | "unexpected token in '" + Twine(IDVal) + "' directive")) | |||
4678 | return true; | |||
4679 | ||||
4680 | for (uint64_t i = 0, e = NumValues; i != e; ++i) | |||
4681 | getStreamer().EmitIntValue(AsInt.getLimitedValue(), | |||
4682 | AsInt.getBitWidth() / 8); | |||
4683 | ||||
4684 | return false; | |||
4685 | } | |||
4686 | ||||
4687 | /// parseDirectiveDS | |||
4688 | /// ::= .ds.{b, d, l, p, s, w, x} expression | |||
4689 | bool AsmParser::parseDirectiveDS(StringRef IDVal, unsigned Size) { | |||
4690 | SMLoc NumValuesLoc = Lexer.getLoc(); | |||
4691 | int64_t NumValues; | |||
4692 | if (checkForValidSection() || parseAbsoluteExpression(NumValues)) | |||
4693 | return true; | |||
4694 | ||||
4695 | if (NumValues < 0) { | |||
4696 | Warning(NumValuesLoc, "'" + Twine(IDVal) + "' directive with negative repeat count has no effect"); | |||
4697 | return false; | |||
4698 | } | |||
4699 | ||||
4700 | if (parseToken(AsmToken::EndOfStatement, | |||
4701 | "unexpected token in '" + Twine(IDVal) + "' directive")) | |||
4702 | return true; | |||
4703 | ||||
4704 | for (uint64_t i = 0, e = NumValues; i != e; ++i) | |||
4705 | getStreamer().emitFill(Size, 0); | |||
4706 | ||||
4707 | return false; | |||
4708 | } | |||
4709 | ||||
4710 | /// parseDirectiveLEB128 | |||
4711 | /// ::= (.sleb128 | .uleb128) [ expression (, expression)* ] | |||
4712 | bool AsmParser::parseDirectiveLEB128(bool Signed) { | |||
4713 | if (checkForValidSection()) | |||
4714 | return true; | |||
4715 | ||||
4716 | auto parseOp = [&]() -> bool { | |||
4717 | const MCExpr *Value; | |||
4718 | if (parseExpression(Value)) | |||
4719 | return true; | |||
4720 | if (Signed) | |||
4721 | getStreamer().EmitSLEB128Value(Value); | |||
4722 | else | |||
4723 | getStreamer().EmitULEB128Value(Value); | |||
4724 | return false; | |||
4725 | }; | |||
4726 | ||||
4727 | if (parseMany(parseOp)) | |||
4728 | return addErrorSuffix(" in directive"); | |||
4729 | ||||
4730 | return false; | |||
4731 | } | |||
4732 | ||||
4733 | /// parseDirectiveSymbolAttribute | |||
4734 | /// ::= { ".globl", ".weak", ... } [ identifier ( , identifier )* ] | |||
4735 | bool AsmParser::parseDirectiveSymbolAttribute(MCSymbolAttr Attr) { | |||
4736 | auto parseOp = [&]() -> bool { | |||
4737 | StringRef Name; | |||
4738 | SMLoc Loc = getTok().getLoc(); | |||
4739 | if (parseIdentifier(Name)) | |||
4740 | return Error(Loc, "expected identifier"); | |||
4741 | MCSymbol *Sym = getContext().getOrCreateSymbol(Name); | |||
4742 | ||||
4743 | // Assembler local symbols don't make any sense here. Complain loudly. | |||
4744 | if (Sym->isTemporary()) | |||
4745 | return Error(Loc, "non-local symbol required"); | |||
4746 | ||||
4747 | if (!getStreamer().EmitSymbolAttribute(Sym, Attr)) | |||
4748 | return Error(Loc, "unable to emit symbol attribute"); | |||
4749 | return false; | |||
4750 | }; | |||
4751 | ||||
4752 | if (parseMany(parseOp)) | |||
4753 | return addErrorSuffix(" in directive"); | |||
4754 | return false; | |||
4755 | } | |||
4756 | ||||
4757 | /// parseDirectiveComm | |||
4758 | /// ::= ( .comm | .lcomm ) identifier , size_expression [ , align_expression ] | |||
4759 | bool AsmParser::parseDirectiveComm(bool IsLocal) { | |||
4760 | if (checkForValidSection()) | |||
4761 | return true; | |||
4762 | ||||
4763 | SMLoc IDLoc = getLexer().getLoc(); | |||
4764 | StringRef Name; | |||
4765 | if (parseIdentifier(Name)) | |||
4766 | return TokError("expected identifier in directive"); | |||
4767 | ||||
4768 | // Handle the identifier as the key symbol. | |||
4769 | MCSymbol *Sym = getContext().getOrCreateSymbol(Name); | |||
4770 | ||||
4771 | if (getLexer().isNot(AsmToken::Comma)) | |||
4772 | return TokError("unexpected token in directive"); | |||
4773 | Lex(); | |||
4774 | ||||
4775 | int64_t Size; | |||
4776 | SMLoc SizeLoc = getLexer().getLoc(); | |||
4777 | if (parseAbsoluteExpression(Size)) | |||
4778 | return true; | |||
4779 | ||||
4780 | int64_t Pow2Alignment = 0; | |||
4781 | SMLoc Pow2AlignmentLoc; | |||
4782 | if (getLexer().is(AsmToken::Comma)) { | |||
4783 | Lex(); | |||
4784 | Pow2AlignmentLoc = getLexer().getLoc(); | |||
4785 | if (parseAbsoluteExpression(Pow2Alignment)) | |||
4786 | return true; | |||
4787 | ||||
4788 | LCOMM::LCOMMType LCOMM = Lexer.getMAI().getLCOMMDirectiveAlignmentType(); | |||
4789 | if (IsLocal && LCOMM == LCOMM::NoAlignment) | |||
4790 | return Error(Pow2AlignmentLoc, "alignment not supported on this target"); | |||
4791 | ||||
4792 | // If this target takes alignments in bytes (not log) validate and convert. | |||
4793 | if ((!IsLocal && Lexer.getMAI().getCOMMDirectiveAlignmentIsInBytes()) || | |||
4794 | (IsLocal && LCOMM == LCOMM::ByteAlignment)) { | |||
4795 | if (!isPowerOf2_64(Pow2Alignment)) | |||
4796 | return Error(Pow2AlignmentLoc, "alignment must be a power of 2"); | |||
4797 | Pow2Alignment = Log2_64(Pow2Alignment); | |||
4798 | } | |||
4799 | } | |||
4800 | ||||
4801 | if (parseToken(AsmToken::EndOfStatement, | |||
4802 | "unexpected token in '.comm' or '.lcomm' directive")) | |||
4803 | return true; | |||
4804 | ||||
4805 | // NOTE: a size of zero for a .comm should create a undefined symbol | |||
4806 | // but a size of .lcomm creates a bss symbol of size zero. | |||
4807 | if (Size < 0) | |||
4808 | return Error(SizeLoc, "invalid '.comm' or '.lcomm' directive size, can't " | |||
4809 | "be less than zero"); | |||
4810 | ||||
4811 | // NOTE: The alignment in the directive is a power of 2 value, the assembler | |||
4812 | // may internally end up wanting an alignment in bytes. | |||
4813 | // FIXME: Diagnose overflow. | |||
4814 | if (Pow2Alignment < 0) | |||
4815 | return Error(Pow2AlignmentLoc, "invalid '.comm' or '.lcomm' directive " | |||
4816 | "alignment, can't be less than zero"); | |||
4817 | ||||
4818 | Sym->redefineIfPossible(); | |||
4819 | if (!Sym->isUndefined()) | |||
4820 | return Error(IDLoc, "invalid symbol redefinition"); | |||
4821 | ||||
4822 | // Create the Symbol as a common or local common with Size and Pow2Alignment | |||
4823 | if (IsLocal) { | |||
4824 | getStreamer().EmitLocalCommonSymbol(Sym, Size, 1 << Pow2Alignment); | |||
4825 | return false; | |||
4826 | } | |||
4827 | ||||
4828 | getStreamer().EmitCommonSymbol(Sym, Size, 1 << Pow2Alignment); | |||
4829 | return false; | |||
4830 | } | |||
4831 | ||||
4832 | /// parseDirectiveAbort | |||
4833 | /// ::= .abort [... message ...] | |||
4834 | bool AsmParser::parseDirectiveAbort() { | |||
4835 | // FIXME: Use loc from directive. | |||
4836 | SMLoc Loc = getLexer().getLoc(); | |||
4837 | ||||
4838 | StringRef Str = parseStringToEndOfStatement(); | |||
4839 | if (parseToken(AsmToken::EndOfStatement, | |||
4840 | "unexpected token in '.abort' directive")) | |||
4841 | return true; | |||
4842 | ||||
4843 | if (Str.empty()) | |||
4844 | return Error(Loc, ".abort detected. Assembly stopping."); | |||
4845 | else | |||
4846 | return Error(Loc, ".abort '" + Str + "' detected. Assembly stopping."); | |||
4847 | // FIXME: Actually abort assembly here. | |||
4848 | ||||
4849 | return false; | |||
4850 | } | |||
4851 | ||||
4852 | /// parseDirectiveInclude | |||
4853 | /// ::= .include "filename" | |||
4854 | bool AsmParser::parseDirectiveInclude() { | |||
4855 | // Allow the strings to have escaped octal character sequence. | |||
4856 | std::string Filename; | |||
4857 | SMLoc IncludeLoc = getTok().getLoc(); | |||
4858 | ||||
4859 | if (check(getTok().isNot(AsmToken::String), | |||
4860 | "expected string in '.include' directive") || | |||
4861 | parseEscapedString(Filename) || | |||
4862 | check(getTok().isNot(AsmToken::EndOfStatement), | |||
4863 | "unexpected token in '.include' directive") || | |||
4864 | // Attempt to switch the lexer to the included file before consuming the | |||
4865 | // end of statement to avoid losing it when we switch. | |||
4866 | check(enterIncludeFile(Filename), IncludeLoc, | |||
4867 | "Could not find include file '" + Filename + "'")) | |||
4868 | return true; | |||
4869 | ||||
4870 | return false; | |||
4871 | } | |||
4872 | ||||
4873 | /// parseDirectiveIncbin | |||
4874 | /// ::= .incbin "filename" [ , skip [ , count ] ] | |||
4875 | bool AsmParser::parseDirectiveIncbin() { | |||
4876 | // Allow the strings to have escaped octal character sequence. | |||
4877 | std::string Filename; | |||
4878 | SMLoc IncbinLoc = getTok().getLoc(); | |||
4879 | if (check(getTok().isNot(AsmToken::String), | |||
4880 | "expected string in '.incbin' directive") || | |||
4881 | parseEscapedString(Filename)) | |||
4882 | return true; | |||
4883 | ||||
4884 | int64_t Skip = 0; | |||
4885 | const MCExpr *Count = nullptr; | |||
4886 | SMLoc SkipLoc, CountLoc; | |||
4887 | if (parseOptionalToken(AsmToken::Comma)) { | |||
4888 | // The skip expression can be omitted while specifying the count, e.g: | |||
4889 | // .incbin "filename",,4 | |||
4890 | if (getTok().isNot(AsmToken::Comma)) { | |||
4891 | if (parseTokenLoc(SkipLoc) || parseAbsoluteExpression(Skip)) | |||
4892 | return true; | |||
4893 | } | |||
4894 | if (parseOptionalToken(AsmToken::Comma)) { | |||
4895 | CountLoc = getTok().getLoc(); | |||
4896 | if (parseExpression(Count)) | |||
4897 | return true; | |||
4898 | } | |||
4899 | } | |||
4900 | ||||
4901 | if (parseToken(AsmToken::EndOfStatement, | |||
4902 | "unexpected token in '.incbin' directive")) | |||
4903 | return true; | |||
4904 | ||||
4905 | if (check(Skip < 0, SkipLoc, "skip is negative")) | |||
4906 | return true; | |||
4907 | ||||
4908 | // Attempt to process the included file. | |||
4909 | if (processIncbinFile(Filename, Skip, Count, CountLoc)) | |||
4910 | return Error(IncbinLoc, "Could not find incbin file '" + Filename + "'"); | |||
4911 | return false; | |||
4912 | } | |||
4913 | ||||
4914 | /// parseDirectiveIf | |||
4915 | /// ::= .if{,eq,ge,gt,le,lt,ne} expression | |||
4916 | bool AsmParser::parseDirectiveIf(SMLoc DirectiveLoc, DirectiveKind DirKind) { | |||
4917 | TheCondStack.push_back(TheCondState); | |||
4918 | TheCondState.TheCond = AsmCond::IfCond; | |||
4919 | if (TheCondState.Ignore) { | |||
4920 | eatToEndOfStatement(); | |||
4921 | } else { | |||
4922 | int64_t ExprValue; | |||
4923 | if (parseAbsoluteExpression(ExprValue) || | |||
4924 | parseToken(AsmToken::EndOfStatement, | |||
4925 | "unexpected token in '.if' directive")) | |||
4926 | return true; | |||
4927 | ||||
4928 | switch (DirKind) { | |||
4929 | default: | |||
4930 | llvm_unreachable("unsupported directive")::llvm::llvm_unreachable_internal("unsupported directive", "/build/llvm-toolchain-snapshot-9~svn362543/lib/MC/MCParser/AsmParser.cpp" , 4930); | |||
4931 | case DK_IF: | |||
4932 | case DK_IFNE: | |||
4933 | break; | |||
4934 | case DK_IFEQ: | |||
4935 | ExprValue = ExprValue == 0; | |||
4936 | break; | |||
4937 | case DK_IFGE: | |||
4938 | ExprValue = ExprValue >= 0; | |||
4939 | break; | |||
4940 | case DK_IFGT: | |||
4941 | ExprValue = ExprValue > 0; | |||
4942 | break; | |||
4943 | case DK_IFLE: | |||
4944 | ExprValue = ExprValue <= 0; | |||
4945 | break; | |||
4946 | case DK_IFLT: | |||
4947 | ExprValue = ExprValue < 0; | |||
4948 | break; | |||
4949 | } | |||
4950 | ||||
4951 | TheCondState.CondMet = ExprValue; | |||
4952 | TheCondState.Ignore = !TheCondState.CondMet; | |||
4953 | } | |||
4954 | ||||
4955 | return false; | |||
4956 | } | |||
4957 | ||||
4958 | /// parseDirectiveIfb | |||
4959 | /// ::= .ifb string | |||
4960 | bool AsmParser::parseDirectiveIfb(SMLoc DirectiveLoc, bool ExpectBlank) { | |||
4961 | TheCondStack.push_back(TheCondState); | |||
4962 | TheCondState.TheCond = AsmCond::IfCond; | |||
4963 | ||||
4964 | if (TheCondState.Ignore) { | |||
4965 | eatToEndOfStatement(); | |||
4966 | } else { | |||
4967 | StringRef Str = parseStringToEndOfStatement(); | |||
4968 | ||||
4969 | if (parseToken(AsmToken::EndOfStatement, | |||
4970 | "unexpected token in '.ifb' directive")) | |||
4971 | return true; | |||
4972 | ||||
4973 | TheCondState.CondMet = ExpectBlank == Str.empty(); | |||
4974 | TheCondState.Ignore = !TheCondState.CondMet; | |||
4975 | } | |||
4976 | ||||
4977 | return false; | |||
4978 | } | |||
4979 | ||||
4980 | /// parseDirectiveIfc | |||
4981 | /// ::= .ifc string1, string2 | |||
4982 | /// ::= .ifnc string1, string2 | |||
4983 | bool AsmParser::parseDirectiveIfc(SMLoc DirectiveLoc, bool ExpectEqual) { | |||
4984 | TheCondStack.push_back(TheCondState); | |||
4985 | TheCondState.TheCond = AsmCond::IfCond; | |||
4986 | ||||
4987 | if (TheCondState.Ignore) { | |||
4988 | eatToEndOfStatement(); | |||
4989 | } else { | |||
4990 | StringRef Str1 = parseStringToComma(); | |||
4991 | ||||
4992 | if (parseToken(AsmToken::Comma, "unexpected token in '.ifc' directive")) | |||
4993 | return true; | |||
4994 | ||||
4995 | StringRef Str2 = parseStringToEndOfStatement(); | |||
4996 | ||||
4997 | if (parseToken(AsmToken::EndOfStatement, | |||
4998 | "unexpected token in '.ifc' directive")) | |||
4999 | return true; | |||
5000 | ||||
5001 | TheCondState.CondMet = ExpectEqual == (Str1.trim() == Str2.trim()); | |||
5002 | TheCondState.Ignore = !TheCondState.CondMet; | |||
5003 | } | |||
5004 | ||||
5005 | return false; | |||
5006 | } | |||
5007 | ||||
5008 | /// parseDirectiveIfeqs | |||
5009 | /// ::= .ifeqs string1, string2 | |||
5010 | bool AsmParser::parseDirectiveIfeqs(SMLoc DirectiveLoc, bool ExpectEqual) { | |||
5011 | if (Lexer.isNot(AsmToken::String)) { | |||
5012 | if (ExpectEqual) | |||
5013 | return TokError("expected string parameter for '.ifeqs' directive"); | |||
5014 | return TokError("expected string parameter for '.ifnes' directive"); | |||
5015 | } | |||
5016 | ||||
5017 | StringRef String1 = getTok().getStringContents(); | |||
5018 | Lex(); | |||
5019 | ||||
5020 | if (Lexer.isNot(AsmToken::Comma)) { | |||
5021 | if (ExpectEqual) | |||
5022 | return TokError( | |||
5023 | "expected comma after first string for '.ifeqs' directive"); | |||
5024 | return TokError("expected comma after first string for '.ifnes' directive"); | |||
5025 | } | |||
5026 | ||||
5027 | Lex(); | |||
5028 | ||||
5029 | if (Lexer.isNot(AsmToken::String)) { | |||
5030 | if (ExpectEqual) | |||
5031 | return TokError("expected string parameter for '.ifeqs' directive"); | |||
5032 | return TokError("expected string parameter for '.ifnes' directive"); | |||
5033 | } | |||
5034 | ||||
5035 | StringRef String2 = getTok().getStringContents(); | |||
5036 | Lex(); | |||
5037 | ||||
5038 | TheCondStack.push_back(TheCondState); | |||
5039 | TheCondState.TheCond = AsmCond::IfCond; | |||
5040 | TheCondState.CondMet = ExpectEqual == (String1 == String2); | |||
5041 | TheCondState.Ignore = !TheCondState.CondMet; | |||
5042 | ||||
5043 | return false; | |||
5044 | } | |||
5045 | ||||
5046 | /// parseDirectiveIfdef | |||
5047 | /// ::= .ifdef symbol | |||
5048 | bool AsmParser::parseDirectiveIfdef(SMLoc DirectiveLoc, bool expect_defined) { | |||
5049 | StringRef Name; | |||
5050 | TheCondStack.push_back(TheCondState); | |||
5051 | TheCondState.TheCond = AsmCond::IfCond; | |||
5052 | ||||
5053 | if (TheCondState.Ignore) { | |||
5054 | eatToEndOfStatement(); | |||
5055 | } else { | |||
5056 | if (check(parseIdentifier(Name), "expected identifier after '.ifdef'") || | |||
5057 | parseToken(AsmToken::EndOfStatement, "unexpected token in '.ifdef'")) | |||
5058 | return true; | |||
5059 | ||||
5060 | MCSymbol *Sym = getContext().lookupSymbol(Name); | |||
5061 | ||||
5062 | if (expect_defined) | |||
5063 | TheCondState.CondMet = (Sym && !Sym->isUndefined(false)); | |||
5064 | else | |||
5065 | TheCondState.CondMet = (!Sym || Sym->isUndefined(false)); | |||
5066 | TheCondState.Ignore = !TheCondState.CondMet; | |||
5067 | } | |||
5068 | ||||
5069 | return false; | |||
5070 | } | |||
5071 | ||||
5072 | /// parseDirectiveElseIf | |||
5073 | /// ::= .elseif expression | |||
5074 | bool AsmParser::parseDirectiveElseIf(SMLoc DirectiveLoc) { | |||
5075 | if (TheCondState.TheCond != AsmCond::IfCond && | |||
5076 | TheCondState.TheCond != AsmCond::ElseIfCond) | |||
5077 | return Error(DirectiveLoc, "Encountered a .elseif that doesn't follow an" | |||
5078 | " .if or an .elseif"); | |||
5079 | TheCondState.TheCond = AsmCond::ElseIfCond; | |||
5080 | ||||
5081 | bool LastIgnoreState = false; | |||
5082 | if (!TheCondStack.empty()) | |||
5083 | LastIgnoreState = TheCondStack.back().Ignore; | |||
5084 | if (LastIgnoreState || TheCondState.CondMet) { | |||
5085 | TheCondState.Ignore = true; | |||
5086 | eatToEndOfStatement(); | |||
5087 | } else { | |||
5088 | int64_t ExprValue; | |||
5089 | if (parseAbsoluteExpression(ExprValue)) | |||
5090 | return true; | |||
5091 | ||||
5092 | if (parseToken(AsmToken::EndOfStatement, | |||
5093 | "unexpected token in '.elseif' directive")) | |||
5094 | return true; | |||
5095 | ||||
5096 | TheCondState.CondMet = ExprValue; | |||
5097 | TheCondState.Ignore = !TheCondState.CondMet; | |||
5098 | } | |||
5099 | ||||
5100 | return false; | |||
5101 | } | |||
5102 | ||||
5103 | /// parseDirectiveElse | |||
5104 | /// ::= .else | |||
5105 | bool AsmParser::parseDirectiveElse(SMLoc DirectiveLoc) { | |||
5106 | if (parseToken(AsmToken::EndOfStatement, | |||
5107 | "unexpected token in '.else' directive")) | |||
5108 | return true; | |||
5109 | ||||
5110 | if (TheCondState.TheCond != AsmCond::IfCond && | |||
5111 | TheCondState.TheCond != AsmCond::ElseIfCond) | |||
5112 | return Error(DirectiveLoc, "Encountered a .else that doesn't follow " | |||
5113 | " an .if or an .elseif"); | |||
5114 | TheCondState.TheCond = AsmCond::ElseCond; | |||
5115 | bool LastIgnoreState = false; | |||
5116 | if (!TheCondStack.empty()) | |||
5117 | LastIgnoreState = TheCondStack.back().Ignore; | |||
5118 | if (LastIgnoreState || TheCondState.CondMet) | |||
5119 | TheCondState.Ignore = true; | |||
5120 | else | |||
5121 | TheCondState.Ignore = false; | |||
5122 | ||||
5123 | return false; | |||
5124 | } | |||
5125 | ||||
5126 | /// parseDirectiveEnd | |||
5127 | /// ::= .end | |||
5128 | bool AsmParser::parseDirectiveEnd(SMLoc DirectiveLoc) { | |||
5129 | if (parseToken(AsmToken::EndOfStatement, | |||
5130 | "unexpected token in '.end' directive")) | |||
5131 | return true; | |||
5132 | ||||
5133 | while (Lexer.isNot(AsmToken::Eof)) | |||
5134 | Lexer.Lex(); | |||
5135 | ||||
5136 | return false; | |||
5137 | } | |||
5138 | ||||
5139 | /// parseDirectiveError | |||
5140 | /// ::= .err | |||
5141 | /// ::= .error [string] | |||
5142 | bool AsmParser::parseDirectiveError(SMLoc L, bool WithMessage) { | |||
5143 | if (!TheCondStack.empty()) { | |||
5144 | if (TheCondStack.back().Ignore) { | |||
5145 | eatToEndOfStatement(); | |||
5146 | return false; | |||
5147 | } | |||
5148 | } | |||
5149 | ||||
5150 | if (!WithMessage) | |||
5151 | return Error(L, ".err encountered"); | |||
5152 | ||||
5153 | StringRef Message = ".error directive invoked in source file"; | |||
5154 | if (Lexer.isNot(AsmToken::EndOfStatement)) { | |||
5155 | if (Lexer.isNot(AsmToken::String)) | |||
5156 | return TokError(".error argument must be a string"); | |||
5157 | ||||
5158 | Message = getTok().getStringContents(); | |||
5159 | Lex(); | |||
5160 | } | |||
5161 | ||||
5162 | return Error(L, Message); | |||
5163 | } | |||
5164 | ||||
5165 | /// parseDirectiveWarning | |||
5166 | /// ::= .warning [string] | |||
5167 | bool AsmParser::parseDirectiveWarning(SMLoc L) { | |||
5168 | if (!TheCondStack.empty()) { | |||
5169 | if (TheCondStack.back().Ignore) { | |||
5170 | eatToEndOfStatement(); | |||
5171 | return false; | |||
5172 | } | |||
5173 | } | |||
5174 | ||||
5175 | StringRef Message = ".warning directive invoked in source file"; | |||
5176 | ||||
5177 | if (!parseOptionalToken(AsmToken::EndOfStatement)) { | |||
5178 | if (Lexer.isNot(AsmToken::String)) | |||
5179 | return TokError(".warning argument must be a string"); | |||
5180 | ||||
5181 | Message = getTok().getStringContents(); | |||
5182 | Lex(); | |||
5183 | if (parseToken(AsmToken::EndOfStatement, | |||
5184 | "expected end of statement in '.warning' directive")) | |||
5185 | return true; | |||
5186 | } | |||
5187 | ||||
5188 | return Warning(L, Message); | |||
5189 | } | |||
5190 | ||||
5191 | /// parseDirectiveEndIf | |||
5192 | /// ::= .endif | |||
5193 | bool AsmParser::parseDirectiveEndIf(SMLoc DirectiveLoc) { | |||
5194 | if (parseToken(AsmToken::EndOfStatement, | |||
5195 | "unexpected token in '.endif' directive")) | |||
5196 | return true; | |||
5197 | ||||
5198 | if ((TheCondState.TheCond == AsmCond::NoCond) || TheCondStack.empty()) | |||
5199 | return Error(DirectiveLoc, "Encountered a .endif that doesn't follow " | |||
5200 | "an .if or .else"); | |||
5201 | if (!TheCondStack.empty()) { | |||
5202 | TheCondState = TheCondStack.back(); | |||
5203 | TheCondStack.pop_back(); | |||
5204 | } | |||
5205 | ||||
5206 | return false; | |||
5207 | } | |||
5208 | ||||
5209 | void AsmParser::initializeDirectiveKindMap() { | |||
5210 | DirectiveKindMap[".set"] = DK_SET; | |||
5211 | DirectiveKindMap[".equ"] = DK_EQU; | |||
5212 | DirectiveKindMap[".equiv"] = DK_EQUIV; | |||
5213 | DirectiveKindMap[".ascii"] = DK_ASCII; | |||
5214 | DirectiveKindMap[".asciz"] = DK_ASCIZ; | |||
5215 | DirectiveKindMap[".string"] = DK_STRING; | |||
5216 | DirectiveKindMap[".byte"] = DK_BYTE; | |||
5217 | DirectiveKindMap[".short"] = DK_SHORT; | |||
5218 | DirectiveKindMap[".value"] = DK_VALUE; | |||
5219 | DirectiveKindMap[".2byte"] = DK_2BYTE; | |||
5220 | DirectiveKindMap[".long"] = DK_LONG; | |||
5221 | DirectiveKindMap[".int"] = DK_INT; | |||
5222 | DirectiveKindMap[".4byte"] = DK_4BYTE; | |||
5223 | DirectiveKindMap[".quad"] = DK_QUAD; | |||
5224 | DirectiveKindMap[".8byte"] = DK_8BYTE; | |||
5225 | DirectiveKindMap[".octa"] = DK_OCTA; | |||
5226 | DirectiveKindMap[".single"] = DK_SINGLE; | |||
5227 | DirectiveKindMap[".float"] = DK_FLOAT; | |||
5228 | DirectiveKindMap[".double"] = DK_DOUBLE; | |||
5229 | DirectiveKindMap[".align"] = DK_ALIGN; | |||
5230 | DirectiveKindMap[".align32"] = DK_ALIGN32; | |||
5231 | DirectiveKindMap[".balign"] = DK_BALIGN; | |||
5232 | DirectiveKindMap[".balignw"] = DK_BALIGNW; | |||
5233 | DirectiveKindMap[".balignl"] = DK_BALIGNL; | |||
5234 | DirectiveKindMap[".p2align"] = DK_P2ALIGN; | |||
5235 | DirectiveKindMap[".p2alignw"] = DK_P2ALIGNW; | |||
5236 | DirectiveKindMap[".p2alignl"] = DK_P2ALIGNL; | |||
5237 | DirectiveKindMap[".org"] = DK_ORG; | |||
5238 | DirectiveKindMap[".fill"] = DK_FILL; | |||
5239 | DirectiveKindMap[".zero"] = DK_ZERO; | |||
5240 | DirectiveKindMap[".extern"] = DK_EXTERN; | |||
5241 | DirectiveKindMap[".globl"] = DK_GLOBL; | |||
5242 | DirectiveKindMap[".global"] = DK_GLOBAL; | |||
5243 | DirectiveKindMap[".lazy_reference"] = DK_LAZY_REFERENCE; | |||
5244 | DirectiveKindMap[".no_dead_strip"] = DK_NO_DEAD_STRIP; | |||
5245 | DirectiveKindMap[".symbol_resolver"] = DK_SYMBOL_RESOLVER; | |||
5246 | DirectiveKindMap[".private_extern"] = DK_PRIVATE_EXTERN; | |||
5247 | DirectiveKindMap[".reference"] = DK_REFERENCE; | |||
5248 | DirectiveKindMap[".weak_definition"] = DK_WEAK_DEFINITION; | |||
5249 | DirectiveKindMap[".weak_reference"] = DK_WEAK_REFERENCE; | |||
5250 | DirectiveKindMap[".weak_def_can_be_hidden"] = DK_WEAK_DEF_CAN_BE_HIDDEN; | |||
5251 | DirectiveKindMap[".cold"] = DK_COLD; | |||
5252 | DirectiveKindMap[".comm"] = DK_COMM; | |||
5253 | DirectiveKindMap[".common"] = DK_COMMON; | |||
5254 | DirectiveKindMap[".lcomm"] = DK_LCOMM; | |||
5255 | DirectiveKindMap[".abort"] = DK_ABORT; | |||
5256 | DirectiveKindMap[".include"] = DK_INCLUDE; | |||
5257 | DirectiveKindMap[".incbin"] = DK_INCBIN; | |||
5258 | DirectiveKindMap[".code16"] = DK_CODE16; | |||
5259 | DirectiveKindMap[".code16gcc"] = DK_CODE16GCC; | |||
5260 | DirectiveKindMap[".rept"] = DK_REPT; | |||
5261 | DirectiveKindMap[".rep"] = DK_REPT; | |||
5262 | DirectiveKindMap[".irp"] = DK_IRP; | |||
5263 | DirectiveKindMap[".irpc"] = DK_IRPC; | |||
5264 | DirectiveKindMap[".endr"] = DK_ENDR; | |||
5265 | DirectiveKindMap[".bundle_align_mode"] = DK_BUNDLE_ALIGN_MODE; | |||
5266 | DirectiveKindMap[".bundle_lock"] = DK_BUNDLE_LOCK; | |||
5267 | DirectiveKindMap[".bundle_unlock"] = DK_BUNDLE_UNLOCK; | |||
5268 | DirectiveKindMap[".if"] = DK_IF; | |||
5269 | DirectiveKindMap[".ifeq"] = DK_IFEQ; | |||
5270 | DirectiveKindMap[".ifge"] = DK_IFGE; | |||
5271 | DirectiveKindMap[".ifgt"] = DK_IFGT; | |||
5272 | DirectiveKindMap[".ifle"] = DK_IFLE; | |||
5273 | DirectiveKindMap[".iflt"] = DK_IFLT; | |||
5274 | DirectiveKindMap[".ifne"] = DK_IFNE; | |||
5275 | DirectiveKindMap[".ifb"] = DK_IFB; | |||
5276 | DirectiveKindMap[".ifnb"] = DK_IFNB; | |||
5277 | DirectiveKindMap[".ifc"] = DK_IFC; | |||
5278 | DirectiveKindMap[".ifeqs"] = DK_IFEQS; | |||
5279 | DirectiveKindMap[".ifnc"] = DK_IFNC; | |||
5280 | DirectiveKindMap[".ifnes"] = DK_IFNES; | |||
5281 | DirectiveKindMap[".ifdef"] = DK_IFDEF; | |||
5282 | DirectiveKindMap[".ifndef"] = DK_IFNDEF; | |||
5283 | DirectiveKindMap[".ifnotdef"] = DK_IFNOTDEF; | |||
5284 | DirectiveKindMap[".elseif"] = DK_ELSEIF; | |||
5285 | DirectiveKindMap[".else"] = DK_ELSE; | |||
5286 | DirectiveKindMap[".end"] = DK_END; | |||
5287 | DirectiveKindMap[".endif"] = DK_ENDIF; | |||
5288 | DirectiveKindMap[".skip"] = DK_SKIP; | |||
5289 | DirectiveKindMap[".space"] = DK_SPACE; | |||
5290 | DirectiveKindMap[".file"] = DK_FILE; | |||
5291 | DirectiveKindMap[".line"] = DK_LINE; | |||
5292 | DirectiveKindMap[".loc"] = DK_LOC; | |||
5293 | DirectiveKindMap[".stabs"] = DK_STABS; | |||
5294 | DirectiveKindMap[".cv_file"] = DK_CV_FILE; | |||
5295 | DirectiveKindMap[".cv_func_id"] = DK_CV_FUNC_ID; | |||
5296 | DirectiveKindMap[".cv_loc"] = DK_CV_LOC; | |||
5297 | DirectiveKindMap[".cv_linetable"] = DK_CV_LINETABLE; | |||
5298 | DirectiveKindMap[".cv_inline_linetable"] = DK_CV_INLINE_LINETABLE; | |||
5299 | DirectiveKindMap[".cv_inline_site_id"] = DK_CV_INLINE_SITE_ID; | |||
5300 | DirectiveKindMap[".cv_def_range"] = DK_CV_DEF_RANGE; | |||
5301 | DirectiveKindMap[".cv_string"] = DK_CV_STRING; | |||
5302 | DirectiveKindMap[".cv_stringtable"] = DK_CV_STRINGTABLE; | |||
5303 | DirectiveKindMap[".cv_filechecksums"] = DK_CV_FILECHECKSUMS; | |||
5304 | DirectiveKindMap[".cv_filechecksumoffset"] = DK_CV_FILECHECKSUM_OFFSET; | |||
5305 | DirectiveKindMap[".cv_fpo_data"] = DK_CV_FPO_DATA; | |||
5306 | DirectiveKindMap[".sleb128"] = DK_SLEB128; | |||
5307 | DirectiveKindMap[".uleb128"] = DK_ULEB128; | |||
5308 | DirectiveKindMap[".cfi_sections"] = DK_CFI_SECTIONS; | |||
5309 | DirectiveKindMap[".cfi_startproc"] = DK_CFI_STARTPROC; | |||
5310 | DirectiveKindMap[".cfi_endproc"] = DK_CFI_ENDPROC; | |||
5311 | DirectiveKindMap[".cfi_def_cfa"] = DK_CFI_DEF_CFA; | |||
5312 | DirectiveKindMap[".cfi_def_cfa_offset"] = DK_CFI_DEF_CFA_OFFSET; | |||
5313 | DirectiveKindMap[".cfi_adjust_cfa_offset"] = DK_CFI_ADJUST_CFA_OFFSET; | |||
5314 | DirectiveKindMap[".cfi_def_cfa_register"] = DK_CFI_DEF_CFA_REGISTER; | |||
5315 | DirectiveKindMap[".cfi_offset"] = DK_CFI_OFFSET; | |||
5316 | DirectiveKindMap[".cfi_rel_offset"] = DK_CFI_REL_OFFSET; | |||
5317 | DirectiveKindMap[".cfi_personality"] = DK_CFI_PERSONALITY; | |||
5318 | DirectiveKindMap[".cfi_lsda"] = DK_CFI_LSDA; | |||
5319 | DirectiveKindMap[".cfi_remember_state"] = DK_CFI_REMEMBER_STATE; | |||
5320 | DirectiveKindMap[".cfi_restore_state"] = DK_CFI_RESTORE_STATE; | |||
5321 | DirectiveKindMap[".cfi_same_value"] = DK_CFI_SAME_VALUE; | |||
5322 | DirectiveKindMap[".cfi_restore"] = DK_CFI_RESTORE; | |||
5323 | DirectiveKindMap[".cfi_escape"] = DK_CFI_ESCAPE; | |||
5324 | DirectiveKindMap[".cfi_return_column"] = DK_CFI_RETURN_COLUMN; | |||
5325 | DirectiveKindMap[".cfi_signal_frame"] = DK_CFI_SIGNAL_FRAME; | |||
5326 | DirectiveKindMap[".cfi_undefined"] = DK_CFI_UNDEFINED; | |||
5327 | DirectiveKindMap[".cfi_register"] = DK_CFI_REGISTER; | |||
5328 | DirectiveKindMap[".cfi_window_save"] = DK_CFI_WINDOW_SAVE; | |||
5329 | DirectiveKindMap[".cfi_b_key_frame"] = DK_CFI_B_KEY_FRAME; | |||
5330 | DirectiveKindMap[".macros_on"] = DK_MACROS_ON; | |||
5331 | DirectiveKindMap[".macros_off"] = DK_MACROS_OFF; | |||
5332 | DirectiveKindMap[".macro"] = DK_MACRO; | |||
5333 | DirectiveKindMap[".exitm"] = DK_EXITM; | |||
5334 | DirectiveKindMap[".endm"] = DK_ENDM; | |||
5335 | DirectiveKindMap[".endmacro"] = DK_ENDMACRO; | |||
5336 | DirectiveKindMap[".purgem"] = DK_PURGEM; | |||
5337 | DirectiveKindMap[".err"] = DK_ERR; | |||
5338 | DirectiveKindMap[".error"] = DK_ERROR; | |||
5339 | DirectiveKindMap[".warning"] = DK_WARNING; | |||
5340 | DirectiveKindMap[".altmacro"] = DK_ALTMACRO; | |||
5341 | DirectiveKindMap[".noaltmacro"] = DK_NOALTMACRO; | |||
5342 | DirectiveKindMap[".reloc"] = DK_RELOC; | |||
5343 | DirectiveKindMap[".dc"] = DK_DC; | |||
5344 | DirectiveKindMap[".dc.a"] = DK_DC_A; | |||
5345 | DirectiveKindMap[".dc.b"] = DK_DC_B; | |||
5346 | DirectiveKindMap[".dc.d"] = DK_DC_D; | |||
5347 | DirectiveKindMap[".dc.l"] = DK_DC_L; | |||
5348 | DirectiveKindMap[".dc.s"] = DK_DC_S; | |||
5349 | DirectiveKindMap[".dc.w"] = DK_DC_W; | |||
5350 | DirectiveKindMap[".dc.x"] = DK_DC_X; | |||
5351 | DirectiveKindMap[".dcb"] = DK_DCB; | |||
5352 | DirectiveKindMap[".dcb.b"] = DK_DCB_B; | |||
5353 | DirectiveKindMap[".dcb.d"] = DK_DCB_D; | |||
5354 | DirectiveKindMap[".dcb.l"] = DK_DCB_L; | |||
5355 | DirectiveKindMap[".dcb.s"] = DK_DCB_S; | |||
5356 | DirectiveKindMap[".dcb.w"] = DK_DCB_W; | |||
5357 | DirectiveKindMap[".dcb.x"] = DK_DCB_X; | |||
5358 | DirectiveKindMap[".ds"] = DK_DS; | |||
5359 | DirectiveKindMap[".ds.b"] = DK_DS_B; | |||
5360 | DirectiveKindMap[".ds.d"] = DK_DS_D; | |||
5361 | DirectiveKindMap[".ds.l"] = DK_DS_L; | |||
5362 | DirectiveKindMap[".ds.p"] = DK_DS_P; | |||
5363 | DirectiveKindMap[".ds.s"] = DK_DS_S; | |||
5364 | DirectiveKindMap[".ds.w"] = DK_DS_W; | |||
5365 | DirectiveKindMap[".ds.x"] = DK_DS_X; | |||
5366 | DirectiveKindMap[".print"] = DK_PRINT; | |||
5367 | DirectiveKindMap[".addrsig"] = DK_ADDRSIG; | |||
5368 | DirectiveKindMap[".addrsig_sym"] = DK_ADDRSIG_SYM; | |||
5369 | } | |||
5370 | ||||
5371 | MCAsmMacro *AsmParser::parseMacroLikeBody(SMLoc DirectiveLoc) { | |||
5372 | AsmToken EndToken, StartToken = getTok(); | |||
5373 | ||||
5374 | unsigned NestLevel = 0; | |||
5375 | while (true) { | |||
5376 | // Check whether we have reached the end of the file. | |||
5377 | if (getLexer().is(AsmToken::Eof)) { | |||
5378 | printError(DirectiveLoc, "no matching '.endr' in definition"); | |||
5379 | return nullptr; | |||
5380 | } | |||
5381 | ||||
5382 | if (Lexer.is(AsmToken::Identifier) && | |||
5383 | (getTok().getIdentifier() == ".rep" || | |||
5384 | getTok().getIdentifier() == ".rept" || | |||
5385 | getTok().getIdentifier() == ".irp" || | |||
5386 | getTok().getIdentifier() == ".irpc")) { | |||
5387 | ++NestLevel; | |||
5388 | } | |||
5389 | ||||
5390 | // Otherwise, check whether we have reached the .endr. | |||
5391 | if (Lexer.is(AsmToken::Identifier) && getTok().getIdentifier() == ".endr") { | |||
5392 | if (NestLevel == 0) { | |||
5393 | EndToken = getTok(); | |||
5394 | Lex(); | |||
5395 | if (Lexer.isNot(AsmToken::EndOfStatement)) { | |||
5396 | printError(getTok().getLoc(), | |||
5397 | "unexpected token in '.endr' directive"); | |||
5398 | return nullptr; | |||
5399 | } | |||
5400 | break; | |||
5401 | } | |||
5402 | --NestLevel; | |||
5403 | } | |||
5404 | ||||
5405 | // Otherwise, scan till the end of the statement. | |||
5406 | eatToEndOfStatement(); | |||
5407 | } | |||
5408 | ||||
5409 | const char *BodyStart = StartToken.getLoc().getPointer(); | |||
5410 | const char *BodyEnd = EndToken.getLoc().getPointer(); | |||
5411 | StringRef Body = StringRef(BodyStart, BodyEnd - BodyStart); | |||
5412 | ||||
5413 | // We Are Anonymous. | |||
5414 | MacroLikeBodies.emplace_back(StringRef(), Body, MCAsmMacroParameters()); | |||
5415 | return &MacroLikeBodies.back(); | |||
5416 | } | |||
5417 | ||||
5418 | void AsmParser::instantiateMacroLikeBody(MCAsmMacro *M, SMLoc DirectiveLoc, | |||
5419 | raw_svector_ostream &OS) { | |||
5420 | OS << ".endr\n"; | |||
5421 | ||||
5422 | std::unique_ptr<MemoryBuffer> Instantiation = | |||
5423 | MemoryBuffer::getMemBufferCopy(OS.str(), "<instantiation>"); | |||
5424 | ||||
5425 | // Create the macro instantiation object and add to the current macro | |||
5426 | // instantiation stack. | |||
5427 | MacroInstantiation *MI = new MacroInstantiation( | |||
5428 | DirectiveLoc, CurBuffer, getTok().getLoc(), TheCondStack.size()); | |||
5429 | ActiveMacros.push_back(MI); | |||
5430 | ||||
5431 | // Jump to the macro instantiation and prime the lexer. | |||
5432 | CurBuffer = SrcMgr.AddNewSourceBuffer(std::move(Instantiation), SMLoc()); | |||
5433 | Lexer.setBuffer(SrcMgr.getMemoryBuffer(CurBuffer)->getBuffer()); | |||
5434 | Lex(); | |||
5435 | } | |||
5436 | ||||
5437 | /// parseDirectiveRept | |||
5438 | /// ::= .rep | .rept count | |||
5439 | bool AsmParser::parseDirectiveRept(SMLoc DirectiveLoc, StringRef Dir) { | |||
5440 | const MCExpr *CountExpr; | |||
5441 | SMLoc CountLoc = getTok().getLoc(); | |||
5442 | if (parseExpression(CountExpr)) | |||
5443 | return true; | |||
5444 | ||||
5445 | int64_t Count; | |||
5446 | if (!CountExpr->evaluateAsAbsolute(Count, getStreamer().getAssemblerPtr())) { | |||
5447 | return Error(CountLoc, "unexpected token in '" + Dir + "' directive"); | |||
5448 | } | |||
5449 | ||||
5450 | if (check(Count < 0, CountLoc, "Count is negative") || | |||
5451 | parseToken(AsmToken::EndOfStatement, | |||
5452 | "unexpected token in '" + Dir + "' directive")) | |||
5453 | return true; | |||
5454 | ||||
5455 | // Lex the rept definition. | |||
5456 | MCAsmMacro *M = parseMacroLikeBody(DirectiveLoc); | |||
5457 | if (!M) | |||
5458 | return true; | |||
5459 | ||||
5460 | // Macro instantiation is lexical, unfortunately. We construct a new buffer | |||
5461 | // to hold the macro body with substitutions. | |||
5462 | SmallString<256> Buf; | |||
5463 | raw_svector_ostream OS(Buf); | |||
5464 | while (Count--) { | |||
5465 | // Note that the AtPseudoVariable is disabled for instantiations of .rep(t). | |||
5466 | if (expandMacro(OS, M->Body, None, None, false, getTok().getLoc())) | |||
5467 | return true; | |||
5468 | } | |||
5469 | instantiateMacroLikeBody(M, DirectiveLoc, OS); | |||
5470 | ||||
5471 | return false; | |||
5472 | } | |||
5473 | ||||
5474 | /// parseDirectiveIrp | |||
5475 | /// ::= .irp symbol,values | |||
5476 | bool AsmParser::parseDirectiveIrp(SMLoc DirectiveLoc) { | |||
5477 | MCAsmMacroParameter Parameter; | |||
5478 | MCAsmMacroArguments A; | |||
5479 | if (check(parseIdentifier(Parameter.Name), | |||
5480 | "expected identifier in '.irp' directive") || | |||
5481 | parseToken(AsmToken::Comma, "expected comma in '.irp' directive") || | |||
5482 | parseMacroArguments(nullptr, A) || | |||
5483 | parseToken(AsmToken::EndOfStatement, "expected End of Statement")) | |||
5484 | return true; | |||
5485 | ||||
5486 | // Lex the irp definition. | |||
5487 | MCAsmMacro *M = parseMacroLikeBody(DirectiveLoc); | |||
5488 | if (!M) | |||
5489 | return true; | |||
5490 | ||||
5491 | // Macro instantiation is lexical, unfortunately. We construct a new buffer | |||
5492 | // to hold the macro body with substitutions. | |||
5493 | SmallString<256> Buf; | |||
5494 | raw_svector_ostream OS(Buf); | |||
5495 | ||||
5496 | for (const MCAsmMacroArgument &Arg : A) { | |||
5497 | // Note that the AtPseudoVariable is enabled for instantiations of .irp. | |||
5498 | // This is undocumented, but GAS seems to support it. | |||
5499 | if (expandMacro(OS, M->Body, Parameter, Arg, true, getTok().getLoc())) | |||
5500 | return true; | |||
5501 | } | |||
5502 | ||||
5503 | instantiateMacroLikeBody(M, DirectiveLoc, OS); | |||
5504 | ||||
5505 | return false; | |||
5506 | } | |||
5507 | ||||
5508 | /// parseDirectiveIrpc | |||
5509 | /// ::= .irpc symbol,values | |||
5510 | bool AsmParser::parseDirectiveIrpc(SMLoc DirectiveLoc) { | |||
5511 | MCAsmMacroParameter Parameter; | |||
5512 | MCAsmMacroArguments A; | |||
5513 | ||||
5514 | if (check(parseIdentifier(Parameter.Name), | |||
5515 | "expected identifier in '.irpc' directive") || | |||
5516 | parseToken(AsmToken::Comma, "expected comma in '.irpc' directive") || | |||
5517 | parseMacroArguments(nullptr, A)) | |||
5518 | return true; | |||
5519 | ||||
5520 | if (A.size() != 1 || A.front().size() != 1) | |||
5521 | return TokError("unexpected token in '.irpc' directive"); | |||
5522 | ||||
5523 | // Eat the end of statement. | |||
5524 | if (parseToken(AsmToken::EndOfStatement, "expected end of statement")) | |||
5525 | return true; | |||
5526 | ||||
5527 | // Lex the irpc definition. | |||
5528 | MCAsmMacro *M = parseMacroLikeBody(DirectiveLoc); | |||
5529 | if (!M) | |||
5530 | return true; | |||
5531 | ||||
5532 | // Macro instantiation is lexical, unfortunately. We construct a new buffer | |||
5533 | // to hold the macro body with substitutions. | |||
5534 | SmallString<256> Buf; | |||
5535 | raw_svector_ostream OS(Buf); | |||
5536 | ||||
5537 | StringRef Values = A.front().front().getString(); | |||
5538 | for (std::size_t I = 0, End = Values.size(); I != End; ++I) { | |||
5539 | MCAsmMacroArgument Arg; | |||
5540 | Arg.emplace_back(AsmToken::Identifier, Values.slice(I, I + 1)); | |||
5541 | ||||
5542 | // Note that the AtPseudoVariable is enabled for instantiations of .irpc. | |||
5543 | // This is undocumented, but GAS seems to support it. | |||
5544 | if (expandMacro(OS, M->Body, Parameter, Arg, true, getTok().getLoc())) | |||
5545 | return true; | |||
5546 | } | |||
5547 | ||||
5548 | instantiateMacroLikeBody(M, DirectiveLoc, OS); | |||
5549 | ||||
5550 | return false; | |||
5551 | } | |||
5552 | ||||
5553 | bool AsmParser::parseDirectiveEndr(SMLoc DirectiveLoc) { | |||
5554 | if (ActiveMacros.empty()) | |||
5555 | return TokError("unmatched '.endr' directive"); | |||
5556 | ||||
5557 | // The only .repl that should get here are the ones created by | |||
5558 | // instantiateMacroLikeBody. | |||
5559 | assert(getLexer().is(AsmToken::EndOfStatement))((getLexer().is(AsmToken::EndOfStatement)) ? static_cast<void > (0) : __assert_fail ("getLexer().is(AsmToken::EndOfStatement)" , "/build/llvm-toolchain-snapshot-9~svn362543/lib/MC/MCParser/AsmParser.cpp" , 5559, __PRETTY_FUNCTION__)); | |||
5560 | ||||
5561 | handleMacroExit(); | |||
5562 | return false; | |||
5563 | } | |||
5564 | ||||
5565 | bool AsmParser::parseDirectiveMSEmit(SMLoc IDLoc, ParseStatementInfo &Info, | |||
5566 | size_t Len) { | |||
5567 | const MCExpr *Value; | |||
5568 | SMLoc ExprLoc = getLexer().getLoc(); | |||
5569 | if (parseExpression(Value)) | |||
5570 | return true; | |||
5571 | const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Value); | |||
5572 | if (!MCE) | |||
5573 | return Error(ExprLoc, "unexpected expression in _emit"); | |||
5574 | uint64_t IntValue = MCE->getValue(); | |||
5575 | if (!isUInt<8>(IntValue) && !isInt<8>(IntValue)) | |||
5576 | return Error(ExprLoc, "literal value out of range for directive"); | |||
5577 | ||||
5578 | Info.AsmRewrites->emplace_back(AOK_Emit, IDLoc, Len); | |||
5579 | return false; | |||
5580 | } | |||
5581 | ||||
5582 | bool AsmParser::parseDirectiveMSAlign(SMLoc IDLoc, ParseStatementInfo &Info) { | |||
5583 | const MCExpr *Value; | |||
5584 | SMLoc ExprLoc = getLexer().getLoc(); | |||
5585 | if (parseExpression(Value)) | |||
5586 | return true; | |||
5587 | const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Value); | |||
5588 | if (!MCE) | |||
5589 | return Error(ExprLoc, "unexpected expression in align"); | |||
5590 | uint64_t IntValue = MCE->getValue(); | |||
5591 | if (!isPowerOf2_64(IntValue)) | |||
5592 | return Error(ExprLoc, "literal value not a power of two greater then zero"); | |||
5593 | ||||
5594 | Info.AsmRewrites->emplace_back(AOK_Align, IDLoc, 5, Log2_64(IntValue)); | |||
5595 | return false; | |||
5596 | } | |||
5597 | ||||
5598 | bool AsmParser::parseDirectivePrint(SMLoc DirectiveLoc) { | |||
5599 | const AsmToken StrTok = getTok(); | |||
5600 | Lex(); | |||
5601 | if (StrTok.isNot(AsmToken::String) || StrTok.getString().front() != '"') | |||
5602 | return Error(DirectiveLoc, "expected double quoted string after .print"); | |||
5603 | if (parseToken(AsmToken::EndOfStatement, "expected end of statement")) | |||
5604 | return true; | |||
5605 | llvm::outs() << StrTok.getStringContents() << '\n'; | |||
5606 | return false; | |||
5607 | } | |||
5608 | ||||
5609 | bool AsmParser::parseDirectiveAddrsig() { | |||
5610 | getStreamer().EmitAddrsig(); | |||
5611 | return false; | |||
5612 | } | |||
5613 | ||||
5614 | bool AsmParser::parseDirectiveAddrsigSym() { | |||
5615 | StringRef Name; | |||
5616 | if (check(parseIdentifier(Name), | |||
5617 | "expected identifier in '.addrsig_sym' directive")) | |||
5618 | return true; | |||
5619 | MCSymbol *Sym = getContext().getOrCreateSymbol(Name); | |||
5620 | getStreamer().EmitAddrsigSym(Sym); | |||
5621 | return false; | |||
5622 | } | |||
5623 | ||||
5624 | // We are comparing pointers, but the pointers are relative to a single string. | |||
5625 | // Thus, this should always be deterministic. | |||
5626 | static int rewritesSort(const AsmRewrite *AsmRewriteA, | |||
5627 | const AsmRewrite *AsmRewriteB) { | |||
5628 | if (AsmRewriteA->Loc.getPointer() < AsmRewriteB->Loc.getPointer()) | |||
5629 | return -1; | |||
5630 | if (AsmRewriteB->Loc.getPointer() < AsmRewriteA->Loc.getPointer()) | |||
5631 | return 1; | |||
5632 | ||||
5633 | // It's possible to have a SizeDirective, Imm/ImmPrefix and an Input/Output | |||
5634 | // rewrite to the same location. Make sure the SizeDirective rewrite is | |||
5635 | // performed first, then the Imm/ImmPrefix and finally the Input/Output. This | |||
5636 | // ensures the sort algorithm is stable. | |||
5637 | if (AsmRewritePrecedence[AsmRewriteA->Kind] > | |||
5638 | AsmRewritePrecedence[AsmRewriteB->Kind]) | |||
5639 | return -1; | |||
5640 | ||||
5641 | if (AsmRewritePrecedence[AsmRewriteA->Kind] < | |||
5642 | AsmRewritePrecedence[AsmRewriteB->Kind]) | |||
5643 | return 1; | |||
5644 | llvm_unreachable("Unstable rewrite sort.")::llvm::llvm_unreachable_internal("Unstable rewrite sort.", "/build/llvm-toolchain-snapshot-9~svn362543/lib/MC/MCParser/AsmParser.cpp" , 5644); | |||
5645 | } | |||
5646 | ||||
5647 | bool AsmParser::parseMSInlineAsm( | |||
5648 | void *AsmLoc, std::string &AsmString, unsigned &NumOutputs, | |||
5649 | unsigned &NumInputs, SmallVectorImpl<std::pair<void *, bool>> &OpDecls, | |||
5650 | SmallVectorImpl<std::string> &Constraints, | |||
5651 | SmallVectorImpl<std::string> &Clobbers, const MCInstrInfo *MII, | |||
5652 | const MCInstPrinter *IP, MCAsmParserSemaCallback &SI) { | |||
5653 | SmallVector<void *, 4> InputDecls; | |||
5654 | SmallVector<void *, 4> OutputDecls; | |||
5655 | SmallVector<bool, 4> InputDeclsAddressOf; | |||
5656 | SmallVector<bool, 4> OutputDeclsAddressOf; | |||
5657 | SmallVector<std::string, 4> InputConstraints; | |||
5658 | SmallVector<std::string, 4> OutputConstraints; | |||
5659 | SmallVector<unsigned, 4> ClobberRegs; | |||
5660 | ||||
5661 | SmallVector<AsmRewrite, 4> AsmStrRewrites; | |||
5662 | ||||
5663 | // Prime the lexer. | |||
5664 | Lex(); | |||
5665 | ||||
5666 | // While we have input, parse each statement. | |||
5667 | unsigned InputIdx = 0; | |||
5668 | unsigned OutputIdx = 0; | |||
5669 | while (getLexer().isNot(AsmToken::Eof)) { | |||
5670 | // Parse curly braces marking block start/end | |||
5671 | if (parseCurlyBlockScope(AsmStrRewrites)) | |||
5672 | continue; | |||
5673 | ||||
5674 | ParseStatementInfo Info(&AsmStrRewrites); | |||
5675 | bool StatementErr = parseStatement(Info, &SI); | |||
5676 | ||||
5677 | if (StatementErr || Info.ParseError) { | |||
5678 | // Emit pending errors if any exist. | |||
5679 | printPendingErrors(); | |||
5680 | return true; | |||
5681 | } | |||
5682 | ||||
5683 | // No pending error should exist here. | |||
5684 | 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-9~svn362543/lib/MC/MCParser/AsmParser.cpp" , 5684, __PRETTY_FUNCTION__)); | |||
5685 | ||||
5686 | if (Info.Opcode == ~0U) | |||
5687 | continue; | |||
5688 | ||||
5689 | const MCInstrDesc &Desc = MII->get(Info.Opcode); | |||
5690 | ||||
5691 | // Build the list of clobbers, outputs and inputs. | |||
5692 | for (unsigned i = 1, e = Info.ParsedOperands.size(); i != e; ++i) { | |||
5693 | MCParsedAsmOperand &Operand = *Info.ParsedOperands[i]; | |||
5694 | ||||
5695 | // Immediate. | |||
5696 | if (Operand.isImm()) | |||
5697 | continue; | |||
5698 | ||||
5699 | // Register operand. | |||
5700 | if (Operand.isReg() && !Operand.needAddressOf() && | |||
5701 | !getTargetParser().OmitRegisterFromClobberLists(Operand.getReg())) { | |||
5702 | unsigned NumDefs = Desc.getNumDefs(); | |||
5703 | // Clobber. | |||
5704 | if (NumDefs && Operand.getMCOperandNum() < NumDefs) | |||
5705 | ClobberRegs.push_back(Operand.getReg()); | |||
5706 | continue; | |||
5707 | } | |||
5708 | ||||
5709 | // Expr/Input or Output. | |||
5710 | StringRef SymName = Operand.getSymName(); | |||
5711 | if (SymName.empty()) | |||
5712 | continue; | |||
5713 | ||||
5714 | void *OpDecl = Operand.getOpDecl(); | |||
5715 | if (!OpDecl) | |||
5716 | continue; | |||
5717 | ||||
5718 | bool isOutput = (i == 1) && Desc.mayStore(); | |||
5719 | SMLoc Start = SMLoc::getFromPointer(SymName.data()); | |||
5720 | if (isOutput) { | |||
5721 | ++InputIdx; | |||
5722 | OutputDecls.push_back(OpDecl); | |||
5723 | OutputDeclsAddressOf.push_back(Operand.needAddressOf()); | |||
5724 | OutputConstraints.push_back(("=" + Operand.getConstraint()).str()); | |||
5725 | AsmStrRewrites.emplace_back(AOK_Output, Start, SymName.size()); | |||
5726 | } else { | |||
5727 | InputDecls.push_back(OpDecl); | |||
5728 | InputDeclsAddressOf.push_back(Operand.needAddressOf()); | |||
5729 | InputConstraints.push_back(Operand.getConstraint().str()); | |||
5730 | AsmStrRewrites.emplace_back(AOK_Input, Start, SymName.size()); | |||
5731 | } | |||
5732 | } | |||
5733 | ||||
5734 | // Consider implicit defs to be clobbers. Think of cpuid and push. | |||
5735 | ArrayRef<MCPhysReg> ImpDefs(Desc.getImplicitDefs(), | |||
5736 | Desc.getNumImplicitDefs()); | |||
5737 | ClobberRegs.insert(ClobberRegs.end(), ImpDefs.begin(), ImpDefs.end()); | |||
5738 | } | |||
5739 | ||||
5740 | // Set the number of Outputs and Inputs. | |||
5741 | NumOutputs = OutputDecls.size(); | |||
5742 | NumInputs = InputDecls.size(); | |||
5743 | ||||
5744 | // Set the unique clobbers. | |||
5745 | array_pod_sort(ClobberRegs.begin(), ClobberRegs.end()); | |||
5746 | ClobberRegs.erase(std::unique(ClobberRegs.begin(), ClobberRegs.end()), | |||
5747 | ClobberRegs.end()); | |||
5748 | Clobbers.assign(ClobberRegs.size(), std::string()); | |||
5749 | for (unsigned I = 0, E = ClobberRegs.size(); I != E; ++I) { | |||
5750 | raw_string_ostream OS(Clobbers[I]); | |||
5751 | IP->printRegName(OS, ClobberRegs[I]); | |||
5752 | } | |||
5753 | ||||
5754 | // Merge the various outputs and inputs. Output are expected first. | |||
5755 | if (NumOutputs || NumInputs) { | |||
5756 | unsigned NumExprs = NumOutputs + NumInputs; | |||
5757 | OpDecls.resize(NumExprs); | |||
5758 | Constraints.resize(NumExprs); | |||
5759 | for (unsigned i = 0; i < NumOutputs; ++i) { | |||
5760 | OpDecls[i] = std::make_pair(OutputDecls[i], OutputDeclsAddressOf[i]); | |||
5761 | Constraints[i] = OutputConstraints[i]; | |||
5762 | } | |||
5763 | for (unsigned i = 0, j = NumOutputs; i < NumInputs; ++i, ++j) { | |||
5764 | OpDecls[j] = std::make_pair(InputDecls[i], InputDeclsAddressOf[i]); | |||
5765 | Constraints[j] = InputConstraints[i]; | |||
5766 | } | |||
5767 | } | |||
5768 | ||||
5769 | // Build the IR assembly string. | |||
5770 | std::string AsmStringIR; | |||
5771 | raw_string_ostream OS(AsmStringIR); | |||
5772 | StringRef ASMString = | |||
5773 | SrcMgr.getMemoryBuffer(SrcMgr.getMainFileID())->getBuffer(); | |||
5774 | const char *AsmStart = ASMString.begin(); | |||
5775 | const char *AsmEnd = ASMString.end(); | |||
5776 | array_pod_sort(AsmStrRewrites.begin(), AsmStrRewrites.end(), rewritesSort); | |||
5777 | for (const AsmRewrite &AR : AsmStrRewrites) { | |||
5778 | AsmRewriteKind Kind = AR.Kind; | |||
5779 | ||||
5780 | const char *Loc = AR.Loc.getPointer(); | |||
5781 | 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-9~svn362543/lib/MC/MCParser/AsmParser.cpp" , 5781, __PRETTY_FUNCTION__)); | |||
5782 | ||||
5783 | // Emit everything up to the immediate/expression. | |||
5784 | if (unsigned Len = Loc - AsmStart) | |||
5785 | OS << StringRef(AsmStart, Len); | |||
5786 | ||||
5787 | // Skip the original expression. | |||
5788 | if (Kind == AOK_Skip) { | |||
5789 | AsmStart = Loc + AR.Len; | |||
5790 | continue; | |||
5791 | } | |||
5792 | ||||
5793 | unsigned AdditionalSkip = 0; | |||
5794 | // Rewrite expressions in $N notation. | |||
5795 | switch (Kind) { | |||
5796 | default: | |||
5797 | break; | |||
5798 | case AOK_IntelExpr: | |||
5799 | 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-9~svn362543/lib/MC/MCParser/AsmParser.cpp" , 5799, __PRETTY_FUNCTION__)); | |||
5800 | if (AR.IntelExp.NeedBracs) | |||
5801 | OS << "["; | |||
5802 | if (AR.IntelExp.hasBaseReg()) | |||
5803 | OS << AR.IntelExp.BaseReg; | |||
5804 | if (AR.IntelExp.hasIndexReg()) | |||
5805 | OS << (AR.IntelExp.hasBaseReg() ? " + " : "") | |||
5806 | << AR.IntelExp.IndexReg; | |||
5807 | if (AR.IntelExp.Scale > 1) | |||
5808 | OS << " * $$" << AR.IntelExp.Scale; | |||
5809 | if (AR.IntelExp.Imm || !AR.IntelExp.hasRegs()) | |||
5810 | OS << (AR.IntelExp.hasRegs() ? " + $$" : "$$") << AR.IntelExp.Imm; | |||
5811 | if (AR.IntelExp.NeedBracs) | |||
5812 | OS << "]"; | |||
5813 | break; | |||
5814 | case AOK_Label: | |||
5815 | OS << Ctx.getAsmInfo()->getPrivateLabelPrefix() << AR.Label; | |||
5816 | break; | |||
5817 | case AOK_Input: | |||
5818 | OS << '$' << InputIdx++; | |||
5819 | break; | |||
5820 | case AOK_Output: | |||
5821 | OS << '$' << OutputIdx++; | |||
5822 | break; | |||
5823 | case AOK_SizeDirective: | |||
5824 | switch (AR.Val) { | |||
5825 | default: break; | |||
5826 | case 8: OS << "byte ptr "; break; | |||
5827 | case 16: OS << "word ptr "; break; | |||
5828 | case 32: OS << "dword ptr "; break; | |||
5829 | case 64: OS << "qword ptr "; break; | |||
5830 | case 80: OS << "xword ptr "; break; | |||
5831 | case 128: OS << "xmmword ptr "; break; | |||
5832 | case 256: OS << "ymmword ptr "; break; | |||
5833 | } | |||
5834 | break; | |||
5835 | case AOK_Emit: | |||
5836 | OS << ".byte"; | |||
5837 | break; | |||
5838 | case AOK_Align: { | |||
5839 | // MS alignment directives are measured in bytes. If the native assembler | |||
5840 | // measures alignment in bytes, we can pass it straight through. | |||
5841 | OS << ".align"; | |||
5842 | if (getContext().getAsmInfo()->getAlignmentIsInBytes()) | |||
5843 | break; | |||
5844 | ||||
5845 | // Alignment is in log2 form, so print that instead and skip the original | |||
5846 | // immediate. | |||
5847 | unsigned Val = AR.Val; | |||
5848 | OS << ' ' << Val; | |||
5849 | 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-9~svn362543/lib/MC/MCParser/AsmParser.cpp" , 5849, __PRETTY_FUNCTION__)); | |||
5850 | AdditionalSkip = (Val < 4) ? 2 : Val < 7 ? 3 : 4; | |||
5851 | break; | |||
5852 | } | |||
5853 | case AOK_EVEN: | |||
5854 | OS << ".even"; | |||
5855 | break; | |||
5856 | case AOK_EndOfStatement: | |||
5857 | OS << "\n\t"; | |||
5858 | break; | |||
5859 | } | |||
5860 | ||||
5861 | // Skip the original expression. | |||
5862 | AsmStart = Loc + AR.Len + AdditionalSkip; | |||
5863 | } | |||
5864 | ||||
5865 | // Emit the remainder of the asm string. | |||
5866 | if (AsmStart != AsmEnd) | |||
5867 | OS << StringRef(AsmStart, AsmEnd - AsmStart); | |||
5868 | ||||
5869 | AsmString = OS.str(); | |||
5870 | return false; | |||
5871 | } | |||
5872 | ||||
5873 | namespace llvm { | |||
5874 | namespace MCParserUtils { | |||
5875 | ||||
5876 | /// Returns whether the given symbol is used anywhere in the given expression, | |||
5877 | /// or subexpressions. | |||
5878 | static bool isSymbolUsedInExpression(const MCSymbol *Sym, const MCExpr *Value) { | |||
5879 | switch (Value->getKind()) { | |||
5880 | case MCExpr::Binary: { | |||
5881 | const MCBinaryExpr *BE = static_cast<const MCBinaryExpr *>(Value); | |||
5882 | return isSymbolUsedInExpression(Sym, BE->getLHS()) || | |||
5883 | isSymbolUsedInExpression(Sym, BE->getRHS()); | |||
5884 | } | |||
5885 | case MCExpr::Target: | |||
5886 | case MCExpr::Constant: | |||
5887 | return false; | |||
5888 | case MCExpr::SymbolRef: { | |||
5889 | const MCSymbol &S = | |||
5890 | static_cast<const MCSymbolRefExpr *>(Value)->getSymbol(); | |||
5891 | if (S.isVariable()) | |||
5892 | return isSymbolUsedInExpression(Sym, S.getVariableValue()); | |||
5893 | return &S == Sym; | |||
5894 | } | |||
5895 | case MCExpr::Unary: | |||
5896 | return isSymbolUsedInExpression( | |||
5897 | Sym, static_cast<const MCUnaryExpr *>(Value)->getSubExpr()); | |||
5898 | } | |||
5899 | ||||
5900 | llvm_unreachable("Unknown expr kind!")::llvm::llvm_unreachable_internal("Unknown expr kind!", "/build/llvm-toolchain-snapshot-9~svn362543/lib/MC/MCParser/AsmParser.cpp" , 5900); | |||
5901 | } | |||
5902 | ||||
5903 | bool parseAssignmentExpression(StringRef Name, bool allow_redef, | |||
5904 | MCAsmParser &Parser, MCSymbol *&Sym, | |||
5905 | const MCExpr *&Value) { | |||
5906 | ||||
5907 | // FIXME: Use better location, we should use proper tokens. | |||
5908 | SMLoc EqualLoc = Parser.getTok().getLoc(); | |||
5909 | if (Parser.parseExpression(Value)) | |||
5910 | return Parser.TokError("missing expression"); | |||
5911 | ||||
5912 | // Note: we don't count b as used in "a = b". This is to allow | |||
5913 | // a = b | |||
5914 | // b = c | |||
5915 | ||||
5916 | if (Parser.parseToken(AsmToken::EndOfStatement)) | |||
5917 | return true; | |||
5918 | ||||
5919 | // Validate that the LHS is allowed to be a variable (either it has not been | |||
5920 | // used as a symbol, or it is an absolute symbol). | |||
5921 | Sym = Parser.getContext().lookupSymbol(Name); | |||
5922 | if (Sym) { | |||
5923 | // Diagnose assignment to a label. | |||
5924 | // | |||
5925 | // FIXME: Diagnostics. Note the location of the definition as a label. | |||
5926 | // FIXME: Diagnose assignment to protected identifier (e.g., register name). | |||
5927 | if (isSymbolUsedInExpression(Sym, Value)) | |||
5928 | return Parser.Error(EqualLoc, "Recursive use of '" + Name + "'"); | |||
5929 | else if (Sym->isUndefined(/*SetUsed*/ false) && !Sym->isUsed() && | |||
5930 | !Sym->isVariable()) | |||
5931 | ; // Allow redefinitions of undefined symbols only used in directives. | |||
5932 | else if (Sym->isVariable() && !Sym->isUsed() && allow_redef) | |||
5933 | ; // Allow redefinitions of variables that haven't yet been used. | |||
5934 | else if (!Sym->isUndefined() && (!Sym->isVariable() || !allow_redef)) | |||
5935 | return Parser.Error(EqualLoc, "redefinition of '" + Name + "'"); | |||
5936 | else if (!Sym->isVariable()) | |||
5937 | return Parser.Error(EqualLoc, "invalid assignment to '" + Name + "'"); | |||
5938 | else if (!isa<MCConstantExpr>(Sym->getVariableValue())) | |||
5939 | return Parser.Error(EqualLoc, | |||
5940 | "invalid reassignment of non-absolute variable '" + | |||
5941 | Name + "'"); | |||
5942 | } else if (Name == ".") { | |||
5943 | Parser.getStreamer().emitValueToOffset(Value, 0, EqualLoc); | |||
5944 | return false; | |||
5945 | } else | |||
5946 | Sym = Parser.getContext().getOrCreateSymbol(Name); | |||
5947 | ||||
5948 | Sym->setRedefinable(allow_redef); | |||
5949 | ||||
5950 | return false; | |||
5951 | } | |||
5952 | ||||
5953 | } // end namespace MCParserUtils | |||
5954 | } // end namespace llvm | |||
5955 | ||||
5956 | /// Create an MCAsmParser instance. | |||
5957 | MCAsmParser *llvm::createMCAsmParser(SourceMgr &SM, MCContext &C, | |||
5958 | MCStreamer &Out, const MCAsmInfo &MAI, | |||
5959 | unsigned CB) { | |||
5960 | return new AsmParser(SM, C, Out, MAI, CB); | |||
5961 | } |