1 //===- LLLexer.cpp - Lexer for .ll Files ----------------------------------===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 //
10 // Implement the Lexer for .ll files.
11 //
12 //===----------------------------------------------------------------------===//
13
14 #include "LLLexer.h"
15 #include "llvm/ADT/StringExtras.h"
16 #include "llvm/ADT/Twine.h"
17 #include "llvm/AsmParser/Parser.h"
18 #include "llvm/IR/DerivedTypes.h"
19 #include "llvm/IR/Instruction.h"
20 #include "llvm/IR/LLVMContext.h"
21 #include "llvm/Support/ErrorHandling.h"
22 #include "llvm/Support/MathExtras.h"
23 #include "llvm/Support/MemoryBuffer.h"
24 #include "llvm/Support/SourceMgr.h"
25 #include "llvm/Support/raw_ostream.h"
26 #include <cctype>
27 #include <cstdio>
28 #include <cstdlib>
29 #include <cstring>
30 using namespace llvm;
31
Error(LocTy ErrorLoc,const Twine & Msg) const32 bool LLLexer::Error(LocTy ErrorLoc, const Twine &Msg) const {
33 ErrorInfo = SM.GetMessage(ErrorLoc, SourceMgr::DK_Error, Msg);
34 return true;
35 }
36
Warning(LocTy WarningLoc,const Twine & Msg) const37 void LLLexer::Warning(LocTy WarningLoc, const Twine &Msg) const {
38 SM.PrintMessage(WarningLoc, SourceMgr::DK_Warning, Msg);
39 }
40
41 //===----------------------------------------------------------------------===//
42 // Helper functions.
43 //===----------------------------------------------------------------------===//
44
45 // atoull - Convert an ascii string of decimal digits into the unsigned long
46 // long representation... this does not have to do input error checking,
47 // because we know that the input will be matched by a suitable regex...
48 //
atoull(const char * Buffer,const char * End)49 uint64_t LLLexer::atoull(const char *Buffer, const char *End) {
50 uint64_t Result = 0;
51 for (; Buffer != End; Buffer++) {
52 uint64_t OldRes = Result;
53 Result *= 10;
54 Result += *Buffer-'0';
55 if (Result < OldRes) { // Uh, oh, overflow detected!!!
56 Error("constant bigger than 64 bits detected!");
57 return 0;
58 }
59 }
60 return Result;
61 }
62
HexIntToVal(const char * Buffer,const char * End)63 uint64_t LLLexer::HexIntToVal(const char *Buffer, const char *End) {
64 uint64_t Result = 0;
65 for (; Buffer != End; ++Buffer) {
66 uint64_t OldRes = Result;
67 Result *= 16;
68 Result += hexDigitValue(*Buffer);
69
70 if (Result < OldRes) { // Uh, oh, overflow detected!!!
71 Error("constant bigger than 64 bits detected!");
72 return 0;
73 }
74 }
75 return Result;
76 }
77
HexToIntPair(const char * Buffer,const char * End,uint64_t Pair[2])78 void LLLexer::HexToIntPair(const char *Buffer, const char *End,
79 uint64_t Pair[2]) {
80 Pair[0] = 0;
81 if (End - Buffer >= 16) {
82 for (int i = 0; i < 16; i++, Buffer++) {
83 assert(Buffer != End);
84 Pair[0] *= 16;
85 Pair[0] += hexDigitValue(*Buffer);
86 }
87 }
88 Pair[1] = 0;
89 for (int i = 0; i < 16 && Buffer != End; i++, Buffer++) {
90 Pair[1] *= 16;
91 Pair[1] += hexDigitValue(*Buffer);
92 }
93 if (Buffer != End)
94 Error("constant bigger than 128 bits detected!");
95 }
96
97 /// FP80HexToIntPair - translate an 80 bit FP80 number (20 hexits) into
98 /// { low64, high16 } as usual for an APInt.
FP80HexToIntPair(const char * Buffer,const char * End,uint64_t Pair[2])99 void LLLexer::FP80HexToIntPair(const char *Buffer, const char *End,
100 uint64_t Pair[2]) {
101 Pair[1] = 0;
102 for (int i=0; i<4 && Buffer != End; i++, Buffer++) {
103 assert(Buffer != End);
104 Pair[1] *= 16;
105 Pair[1] += hexDigitValue(*Buffer);
106 }
107 Pair[0] = 0;
108 for (int i = 0; i < 16 && Buffer != End; i++, Buffer++) {
109 Pair[0] *= 16;
110 Pair[0] += hexDigitValue(*Buffer);
111 }
112 if (Buffer != End)
113 Error("constant bigger than 128 bits detected!");
114 }
115
116 // UnEscapeLexed - Run through the specified buffer and change \xx codes to the
117 // appropriate character.
UnEscapeLexed(std::string & Str)118 static void UnEscapeLexed(std::string &Str) {
119 if (Str.empty()) return;
120
121 char *Buffer = &Str[0], *EndBuffer = Buffer+Str.size();
122 char *BOut = Buffer;
123 for (char *BIn = Buffer; BIn != EndBuffer; ) {
124 if (BIn[0] == '\\') {
125 if (BIn < EndBuffer-1 && BIn[1] == '\\') {
126 *BOut++ = '\\'; // Two \ becomes one
127 BIn += 2;
128 } else if (BIn < EndBuffer-2 &&
129 isxdigit(static_cast<unsigned char>(BIn[1])) &&
130 isxdigit(static_cast<unsigned char>(BIn[2]))) {
131 *BOut = hexDigitValue(BIn[1]) * 16 + hexDigitValue(BIn[2]);
132 BIn += 3; // Skip over handled chars
133 ++BOut;
134 } else {
135 *BOut++ = *BIn++;
136 }
137 } else {
138 *BOut++ = *BIn++;
139 }
140 }
141 Str.resize(BOut-Buffer);
142 }
143
144 /// isLabelChar - Return true for [-a-zA-Z$._0-9].
isLabelChar(char C)145 static bool isLabelChar(char C) {
146 return isalnum(static_cast<unsigned char>(C)) || C == '-' || C == '$' ||
147 C == '.' || C == '_';
148 }
149
150
151 /// isLabelTail - Return true if this pointer points to a valid end of a label.
isLabelTail(const char * CurPtr)152 static const char *isLabelTail(const char *CurPtr) {
153 while (1) {
154 if (CurPtr[0] == ':') return CurPtr+1;
155 if (!isLabelChar(CurPtr[0])) return nullptr;
156 ++CurPtr;
157 }
158 }
159
160
161
162 //===----------------------------------------------------------------------===//
163 // Lexer definition.
164 //===----------------------------------------------------------------------===//
165
LLLexer(StringRef StartBuf,SourceMgr & sm,SMDiagnostic & Err,LLVMContext & C)166 LLLexer::LLLexer(StringRef StartBuf, SourceMgr &sm, SMDiagnostic &Err,
167 LLVMContext &C)
168 : CurBuf(StartBuf), ErrorInfo(Err), SM(sm), Context(C), APFloatVal(0.0) {
169 CurPtr = CurBuf.begin();
170 }
171
getNextChar()172 int LLLexer::getNextChar() {
173 char CurChar = *CurPtr++;
174 switch (CurChar) {
175 default: return (unsigned char)CurChar;
176 case 0:
177 // A nul character in the stream is either the end of the current buffer or
178 // a random nul in the file. Disambiguate that here.
179 if (CurPtr-1 != CurBuf.end())
180 return 0; // Just whitespace.
181
182 // Otherwise, return end of file.
183 --CurPtr; // Another call to lex will return EOF again.
184 return EOF;
185 }
186 }
187
188
LexToken()189 lltok::Kind LLLexer::LexToken() {
190 TokStart = CurPtr;
191
192 int CurChar = getNextChar();
193 switch (CurChar) {
194 default:
195 // Handle letters: [a-zA-Z_]
196 if (isalpha(static_cast<unsigned char>(CurChar)) || CurChar == '_')
197 return LexIdentifier();
198
199 return lltok::Error;
200 case EOF: return lltok::Eof;
201 case 0:
202 case ' ':
203 case '\t':
204 case '\n':
205 case '\r':
206 // Ignore whitespace.
207 return LexToken();
208 case '+': return LexPositive();
209 case '@': return LexAt();
210 case '$': return LexDollar();
211 case '%': return LexPercent();
212 case '"': return LexQuote();
213 case '.':
214 if (const char *Ptr = isLabelTail(CurPtr)) {
215 CurPtr = Ptr;
216 StrVal.assign(TokStart, CurPtr-1);
217 return lltok::LabelStr;
218 }
219 if (CurPtr[0] == '.' && CurPtr[1] == '.') {
220 CurPtr += 2;
221 return lltok::dotdotdot;
222 }
223 return lltok::Error;
224 case ';':
225 SkipLineComment();
226 return LexToken();
227 case '!': return LexExclaim();
228 case '#': return LexHash();
229 case '0': case '1': case '2': case '3': case '4':
230 case '5': case '6': case '7': case '8': case '9':
231 case '-':
232 return LexDigitOrNegative();
233 case '=': return lltok::equal;
234 case '[': return lltok::lsquare;
235 case ']': return lltok::rsquare;
236 case '{': return lltok::lbrace;
237 case '}': return lltok::rbrace;
238 case '<': return lltok::less;
239 case '>': return lltok::greater;
240 case '(': return lltok::lparen;
241 case ')': return lltok::rparen;
242 case ',': return lltok::comma;
243 case '*': return lltok::star;
244 case '|': return lltok::bar;
245 }
246 }
247
SkipLineComment()248 void LLLexer::SkipLineComment() {
249 while (1) {
250 if (CurPtr[0] == '\n' || CurPtr[0] == '\r' || getNextChar() == EOF)
251 return;
252 }
253 }
254
255 /// Lex all tokens that start with an @ character.
256 /// GlobalVar @\"[^\"]*\"
257 /// GlobalVar @[-a-zA-Z$._][-a-zA-Z$._0-9]*
258 /// GlobalVarID @[0-9]+
LexAt()259 lltok::Kind LLLexer::LexAt() {
260 return LexVar(lltok::GlobalVar, lltok::GlobalID);
261 }
262
LexDollar()263 lltok::Kind LLLexer::LexDollar() {
264 if (const char *Ptr = isLabelTail(TokStart)) {
265 CurPtr = Ptr;
266 StrVal.assign(TokStart, CurPtr - 1);
267 return lltok::LabelStr;
268 }
269
270 // Handle DollarStringConstant: $\"[^\"]*\"
271 if (CurPtr[0] == '"') {
272 ++CurPtr;
273
274 while (1) {
275 int CurChar = getNextChar();
276
277 if (CurChar == EOF) {
278 Error("end of file in COMDAT variable name");
279 return lltok::Error;
280 }
281 if (CurChar == '"') {
282 StrVal.assign(TokStart + 2, CurPtr - 1);
283 UnEscapeLexed(StrVal);
284 if (StringRef(StrVal).find_first_of(0) != StringRef::npos) {
285 Error("Null bytes are not allowed in names");
286 return lltok::Error;
287 }
288 return lltok::ComdatVar;
289 }
290 }
291 }
292
293 // Handle ComdatVarName: $[-a-zA-Z$._][-a-zA-Z$._0-9]*
294 if (ReadVarName())
295 return lltok::ComdatVar;
296
297 return lltok::Error;
298 }
299
300 /// ReadString - Read a string until the closing quote.
ReadString(lltok::Kind kind)301 lltok::Kind LLLexer::ReadString(lltok::Kind kind) {
302 const char *Start = CurPtr;
303 while (1) {
304 int CurChar = getNextChar();
305
306 if (CurChar == EOF) {
307 Error("end of file in string constant");
308 return lltok::Error;
309 }
310 if (CurChar == '"') {
311 StrVal.assign(Start, CurPtr-1);
312 UnEscapeLexed(StrVal);
313 return kind;
314 }
315 }
316 }
317
318 /// ReadVarName - Read the rest of a token containing a variable name.
ReadVarName()319 bool LLLexer::ReadVarName() {
320 const char *NameStart = CurPtr;
321 if (isalpha(static_cast<unsigned char>(CurPtr[0])) ||
322 CurPtr[0] == '-' || CurPtr[0] == '$' ||
323 CurPtr[0] == '.' || CurPtr[0] == '_') {
324 ++CurPtr;
325 while (isalnum(static_cast<unsigned char>(CurPtr[0])) ||
326 CurPtr[0] == '-' || CurPtr[0] == '$' ||
327 CurPtr[0] == '.' || CurPtr[0] == '_')
328 ++CurPtr;
329
330 StrVal.assign(NameStart, CurPtr);
331 return true;
332 }
333 return false;
334 }
335
LexVar(lltok::Kind Var,lltok::Kind VarID)336 lltok::Kind LLLexer::LexVar(lltok::Kind Var, lltok::Kind VarID) {
337 // Handle StringConstant: \"[^\"]*\"
338 if (CurPtr[0] == '"') {
339 ++CurPtr;
340
341 while (1) {
342 int CurChar = getNextChar();
343
344 if (CurChar == EOF) {
345 Error("end of file in global variable name");
346 return lltok::Error;
347 }
348 if (CurChar == '"') {
349 StrVal.assign(TokStart+2, CurPtr-1);
350 UnEscapeLexed(StrVal);
351 if (StringRef(StrVal).find_first_of(0) != StringRef::npos) {
352 Error("Null bytes are not allowed in names");
353 return lltok::Error;
354 }
355 return Var;
356 }
357 }
358 }
359
360 // Handle VarName: [-a-zA-Z$._][-a-zA-Z$._0-9]*
361 if (ReadVarName())
362 return Var;
363
364 // Handle VarID: [0-9]+
365 if (isdigit(static_cast<unsigned char>(CurPtr[0]))) {
366 for (++CurPtr; isdigit(static_cast<unsigned char>(CurPtr[0])); ++CurPtr)
367 /*empty*/;
368
369 uint64_t Val = atoull(TokStart+1, CurPtr);
370 if ((unsigned)Val != Val)
371 Error("invalid value number (too large)!");
372 UIntVal = unsigned(Val);
373 return VarID;
374 }
375 return lltok::Error;
376 }
377
378 /// Lex all tokens that start with a % character.
379 /// LocalVar ::= %\"[^\"]*\"
380 /// LocalVar ::= %[-a-zA-Z$._][-a-zA-Z$._0-9]*
381 /// LocalVarID ::= %[0-9]+
LexPercent()382 lltok::Kind LLLexer::LexPercent() {
383 return LexVar(lltok::LocalVar, lltok::LocalVarID);
384 }
385
386 /// Lex all tokens that start with a " character.
387 /// QuoteLabel "[^"]+":
388 /// StringConstant "[^"]*"
LexQuote()389 lltok::Kind LLLexer::LexQuote() {
390 lltok::Kind kind = ReadString(lltok::StringConstant);
391 if (kind == lltok::Error || kind == lltok::Eof)
392 return kind;
393
394 if (CurPtr[0] == ':') {
395 ++CurPtr;
396 if (StringRef(StrVal).find_first_of(0) != StringRef::npos) {
397 Error("Null bytes are not allowed in names");
398 kind = lltok::Error;
399 } else {
400 kind = lltok::LabelStr;
401 }
402 }
403
404 return kind;
405 }
406
407 /// Lex all tokens that start with a ! character.
408 /// !foo
409 /// !
LexExclaim()410 lltok::Kind LLLexer::LexExclaim() {
411 // Lex a metadata name as a MetadataVar.
412 if (isalpha(static_cast<unsigned char>(CurPtr[0])) ||
413 CurPtr[0] == '-' || CurPtr[0] == '$' ||
414 CurPtr[0] == '.' || CurPtr[0] == '_' || CurPtr[0] == '\\') {
415 ++CurPtr;
416 while (isalnum(static_cast<unsigned char>(CurPtr[0])) ||
417 CurPtr[0] == '-' || CurPtr[0] == '$' ||
418 CurPtr[0] == '.' || CurPtr[0] == '_' || CurPtr[0] == '\\')
419 ++CurPtr;
420
421 StrVal.assign(TokStart+1, CurPtr); // Skip !
422 UnEscapeLexed(StrVal);
423 return lltok::MetadataVar;
424 }
425 return lltok::exclaim;
426 }
427
428 /// Lex all tokens that start with a # character.
429 /// AttrGrpID ::= #[0-9]+
LexHash()430 lltok::Kind LLLexer::LexHash() {
431 // Handle AttrGrpID: #[0-9]+
432 if (isdigit(static_cast<unsigned char>(CurPtr[0]))) {
433 for (++CurPtr; isdigit(static_cast<unsigned char>(CurPtr[0])); ++CurPtr)
434 /*empty*/;
435
436 uint64_t Val = atoull(TokStart+1, CurPtr);
437 if ((unsigned)Val != Val)
438 Error("invalid value number (too large)!");
439 UIntVal = unsigned(Val);
440 return lltok::AttrGrpID;
441 }
442
443 return lltok::Error;
444 }
445
446 /// Lex a label, integer type, keyword, or hexadecimal integer constant.
447 /// Label [-a-zA-Z$._0-9]+:
448 /// IntegerType i[0-9]+
449 /// Keyword sdiv, float, ...
450 /// HexIntConstant [us]0x[0-9A-Fa-f]+
LexIdentifier()451 lltok::Kind LLLexer::LexIdentifier() {
452 const char *StartChar = CurPtr;
453 const char *IntEnd = CurPtr[-1] == 'i' ? nullptr : StartChar;
454 const char *KeywordEnd = nullptr;
455
456 for (; isLabelChar(*CurPtr); ++CurPtr) {
457 // If we decide this is an integer, remember the end of the sequence.
458 if (!IntEnd && !isdigit(static_cast<unsigned char>(*CurPtr)))
459 IntEnd = CurPtr;
460 if (!KeywordEnd && !isalnum(static_cast<unsigned char>(*CurPtr)) &&
461 *CurPtr != '_')
462 KeywordEnd = CurPtr;
463 }
464
465 // If we stopped due to a colon, this really is a label.
466 if (*CurPtr == ':') {
467 StrVal.assign(StartChar-1, CurPtr++);
468 return lltok::LabelStr;
469 }
470
471 // Otherwise, this wasn't a label. If this was valid as an integer type,
472 // return it.
473 if (!IntEnd) IntEnd = CurPtr;
474 if (IntEnd != StartChar) {
475 CurPtr = IntEnd;
476 uint64_t NumBits = atoull(StartChar, CurPtr);
477 if (NumBits < IntegerType::MIN_INT_BITS ||
478 NumBits > IntegerType::MAX_INT_BITS) {
479 Error("bitwidth for integer type out of range!");
480 return lltok::Error;
481 }
482 TyVal = IntegerType::get(Context, NumBits);
483 return lltok::Type;
484 }
485
486 // Otherwise, this was a letter sequence. See which keyword this is.
487 if (!KeywordEnd) KeywordEnd = CurPtr;
488 CurPtr = KeywordEnd;
489 --StartChar;
490 StringRef Keyword(StartChar, CurPtr - StartChar);
491 #define KEYWORD(STR) \
492 do { \
493 if (Keyword == #STR) \
494 return lltok::kw_##STR; \
495 } while (0)
496
497 KEYWORD(true); KEYWORD(false);
498 KEYWORD(declare); KEYWORD(define);
499 KEYWORD(global); KEYWORD(constant);
500
501 KEYWORD(private);
502 KEYWORD(internal);
503 KEYWORD(available_externally);
504 KEYWORD(linkonce);
505 KEYWORD(linkonce_odr);
506 KEYWORD(weak); // Use as a linkage, and a modifier for "cmpxchg".
507 KEYWORD(weak_odr);
508 KEYWORD(appending);
509 KEYWORD(dllimport);
510 KEYWORD(dllexport);
511 KEYWORD(common);
512 KEYWORD(default);
513 KEYWORD(hidden);
514 KEYWORD(protected);
515 KEYWORD(unnamed_addr);
516 KEYWORD(externally_initialized);
517 KEYWORD(extern_weak);
518 KEYWORD(external);
519 KEYWORD(thread_local);
520 KEYWORD(localdynamic);
521 KEYWORD(initialexec);
522 KEYWORD(localexec);
523 KEYWORD(zeroinitializer);
524 KEYWORD(undef);
525 KEYWORD(null);
526 KEYWORD(none);
527 KEYWORD(to);
528 KEYWORD(caller);
529 KEYWORD(within);
530 KEYWORD(from);
531 KEYWORD(tail);
532 KEYWORD(musttail);
533 KEYWORD(notail);
534 KEYWORD(target);
535 KEYWORD(triple);
536 KEYWORD(unwind);
537 KEYWORD(deplibs); // FIXME: Remove in 4.0.
538 KEYWORD(datalayout);
539 KEYWORD(volatile);
540 KEYWORD(atomic);
541 KEYWORD(unordered);
542 KEYWORD(monotonic);
543 KEYWORD(acquire);
544 KEYWORD(release);
545 KEYWORD(acq_rel);
546 KEYWORD(seq_cst);
547 KEYWORD(singlethread);
548
549 KEYWORD(nnan);
550 KEYWORD(ninf);
551 KEYWORD(nsz);
552 KEYWORD(arcp);
553 KEYWORD(fast);
554 KEYWORD(nuw);
555 KEYWORD(nsw);
556 KEYWORD(exact);
557 KEYWORD(inbounds);
558 KEYWORD(align);
559 KEYWORD(addrspace);
560 KEYWORD(section);
561 KEYWORD(alias);
562 KEYWORD(module);
563 KEYWORD(asm);
564 KEYWORD(sideeffect);
565 KEYWORD(alignstack);
566 KEYWORD(inteldialect);
567 KEYWORD(gc);
568 KEYWORD(prefix);
569 KEYWORD(prologue);
570
571 KEYWORD(ccc);
572 KEYWORD(fastcc);
573 KEYWORD(coldcc);
574 KEYWORD(x86_stdcallcc);
575 KEYWORD(x86_fastcallcc);
576 KEYWORD(x86_thiscallcc);
577 KEYWORD(x86_vectorcallcc);
578 KEYWORD(arm_apcscc);
579 KEYWORD(arm_aapcscc);
580 KEYWORD(arm_aapcs_vfpcc);
581 KEYWORD(msp430_intrcc);
582 KEYWORD(ptx_kernel);
583 KEYWORD(ptx_device);
584 KEYWORD(spir_kernel);
585 KEYWORD(spir_func);
586 KEYWORD(intel_ocl_bicc);
587 KEYWORD(x86_64_sysvcc);
588 KEYWORD(x86_64_win64cc);
589 KEYWORD(webkit_jscc);
590 KEYWORD(anyregcc);
591 KEYWORD(preserve_mostcc);
592 KEYWORD(preserve_allcc);
593 KEYWORD(ghccc);
594 KEYWORD(x86_intrcc);
595 KEYWORD(hhvmcc);
596 KEYWORD(hhvm_ccc);
597 KEYWORD(cxx_fast_tlscc);
598
599 KEYWORD(cc);
600 KEYWORD(c);
601
602 KEYWORD(attributes);
603
604 KEYWORD(alwaysinline);
605 KEYWORD(argmemonly);
606 KEYWORD(builtin);
607 KEYWORD(byval);
608 KEYWORD(inalloca);
609 KEYWORD(cold);
610 KEYWORD(convergent);
611 KEYWORD(dereferenceable);
612 KEYWORD(dereferenceable_or_null);
613 KEYWORD(inaccessiblememonly);
614 KEYWORD(inaccessiblemem_or_argmemonly);
615 KEYWORD(inlinehint);
616 KEYWORD(inreg);
617 KEYWORD(jumptable);
618 KEYWORD(minsize);
619 KEYWORD(naked);
620 KEYWORD(nest);
621 KEYWORD(noalias);
622 KEYWORD(nobuiltin);
623 KEYWORD(nocapture);
624 KEYWORD(noduplicate);
625 KEYWORD(noimplicitfloat);
626 KEYWORD(noinline);
627 KEYWORD(norecurse);
628 KEYWORD(nonlazybind);
629 KEYWORD(nonnull);
630 KEYWORD(noredzone);
631 KEYWORD(noreturn);
632 KEYWORD(nounwind);
633 KEYWORD(optnone);
634 KEYWORD(optsize);
635 KEYWORD(readnone);
636 KEYWORD(readonly);
637 KEYWORD(returned);
638 KEYWORD(returns_twice);
639 KEYWORD(signext);
640 KEYWORD(sret);
641 KEYWORD(ssp);
642 KEYWORD(sspreq);
643 KEYWORD(sspstrong);
644 KEYWORD(safestack);
645 KEYWORD(sanitize_address);
646 KEYWORD(sanitize_thread);
647 KEYWORD(sanitize_memory);
648 KEYWORD(uwtable);
649 KEYWORD(zeroext);
650
651 KEYWORD(type);
652 KEYWORD(opaque);
653
654 KEYWORD(comdat);
655
656 // Comdat types
657 KEYWORD(any);
658 KEYWORD(exactmatch);
659 KEYWORD(largest);
660 KEYWORD(noduplicates);
661 KEYWORD(samesize);
662
663 KEYWORD(eq); KEYWORD(ne); KEYWORD(slt); KEYWORD(sgt); KEYWORD(sle);
664 KEYWORD(sge); KEYWORD(ult); KEYWORD(ugt); KEYWORD(ule); KEYWORD(uge);
665 KEYWORD(oeq); KEYWORD(one); KEYWORD(olt); KEYWORD(ogt); KEYWORD(ole);
666 KEYWORD(oge); KEYWORD(ord); KEYWORD(uno); KEYWORD(ueq); KEYWORD(une);
667
668 KEYWORD(xchg); KEYWORD(nand); KEYWORD(max); KEYWORD(min); KEYWORD(umax);
669 KEYWORD(umin);
670
671 KEYWORD(x);
672 KEYWORD(blockaddress);
673
674 // Metadata types.
675 KEYWORD(distinct);
676
677 // Use-list order directives.
678 KEYWORD(uselistorder);
679 KEYWORD(uselistorder_bb);
680
681 KEYWORD(personality);
682 KEYWORD(cleanup);
683 KEYWORD(catch);
684 KEYWORD(filter);
685 #undef KEYWORD
686
687 // Keywords for types.
688 #define TYPEKEYWORD(STR, LLVMTY) \
689 do { \
690 if (Keyword == STR) { \
691 TyVal = LLVMTY; \
692 return lltok::Type; \
693 } \
694 } while (false)
695 TYPEKEYWORD("void", Type::getVoidTy(Context));
696 TYPEKEYWORD("half", Type::getHalfTy(Context));
697 TYPEKEYWORD("float", Type::getFloatTy(Context));
698 TYPEKEYWORD("double", Type::getDoubleTy(Context));
699 TYPEKEYWORD("x86_fp80", Type::getX86_FP80Ty(Context));
700 TYPEKEYWORD("fp128", Type::getFP128Ty(Context));
701 TYPEKEYWORD("ppc_fp128", Type::getPPC_FP128Ty(Context));
702 TYPEKEYWORD("label", Type::getLabelTy(Context));
703 TYPEKEYWORD("metadata", Type::getMetadataTy(Context));
704 TYPEKEYWORD("x86_mmx", Type::getX86_MMXTy(Context));
705 TYPEKEYWORD("token", Type::getTokenTy(Context));
706 #undef TYPEKEYWORD
707
708 // Keywords for instructions.
709 #define INSTKEYWORD(STR, Enum) \
710 do { \
711 if (Keyword == #STR) { \
712 UIntVal = Instruction::Enum; \
713 return lltok::kw_##STR; \
714 } \
715 } while (false)
716
717 INSTKEYWORD(add, Add); INSTKEYWORD(fadd, FAdd);
718 INSTKEYWORD(sub, Sub); INSTKEYWORD(fsub, FSub);
719 INSTKEYWORD(mul, Mul); INSTKEYWORD(fmul, FMul);
720 INSTKEYWORD(udiv, UDiv); INSTKEYWORD(sdiv, SDiv); INSTKEYWORD(fdiv, FDiv);
721 INSTKEYWORD(urem, URem); INSTKEYWORD(srem, SRem); INSTKEYWORD(frem, FRem);
722 INSTKEYWORD(shl, Shl); INSTKEYWORD(lshr, LShr); INSTKEYWORD(ashr, AShr);
723 INSTKEYWORD(and, And); INSTKEYWORD(or, Or); INSTKEYWORD(xor, Xor);
724 INSTKEYWORD(icmp, ICmp); INSTKEYWORD(fcmp, FCmp);
725
726 INSTKEYWORD(phi, PHI);
727 INSTKEYWORD(call, Call);
728 INSTKEYWORD(trunc, Trunc);
729 INSTKEYWORD(zext, ZExt);
730 INSTKEYWORD(sext, SExt);
731 INSTKEYWORD(fptrunc, FPTrunc);
732 INSTKEYWORD(fpext, FPExt);
733 INSTKEYWORD(uitofp, UIToFP);
734 INSTKEYWORD(sitofp, SIToFP);
735 INSTKEYWORD(fptoui, FPToUI);
736 INSTKEYWORD(fptosi, FPToSI);
737 INSTKEYWORD(inttoptr, IntToPtr);
738 INSTKEYWORD(ptrtoint, PtrToInt);
739 INSTKEYWORD(bitcast, BitCast);
740 INSTKEYWORD(addrspacecast, AddrSpaceCast);
741 INSTKEYWORD(select, Select);
742 INSTKEYWORD(va_arg, VAArg);
743 INSTKEYWORD(ret, Ret);
744 INSTKEYWORD(br, Br);
745 INSTKEYWORD(switch, Switch);
746 INSTKEYWORD(indirectbr, IndirectBr);
747 INSTKEYWORD(invoke, Invoke);
748 INSTKEYWORD(resume, Resume);
749 INSTKEYWORD(unreachable, Unreachable);
750
751 INSTKEYWORD(alloca, Alloca);
752 INSTKEYWORD(load, Load);
753 INSTKEYWORD(store, Store);
754 INSTKEYWORD(cmpxchg, AtomicCmpXchg);
755 INSTKEYWORD(atomicrmw, AtomicRMW);
756 INSTKEYWORD(fence, Fence);
757 INSTKEYWORD(getelementptr, GetElementPtr);
758
759 INSTKEYWORD(extractelement, ExtractElement);
760 INSTKEYWORD(insertelement, InsertElement);
761 INSTKEYWORD(shufflevector, ShuffleVector);
762 INSTKEYWORD(extractvalue, ExtractValue);
763 INSTKEYWORD(insertvalue, InsertValue);
764 INSTKEYWORD(landingpad, LandingPad);
765 INSTKEYWORD(cleanupret, CleanupRet);
766 INSTKEYWORD(catchret, CatchRet);
767 INSTKEYWORD(catchswitch, CatchSwitch);
768 INSTKEYWORD(catchpad, CatchPad);
769 INSTKEYWORD(cleanuppad, CleanupPad);
770 #undef INSTKEYWORD
771
772 #define DWKEYWORD(TYPE, TOKEN) \
773 do { \
774 if (Keyword.startswith("DW_" #TYPE "_")) { \
775 StrVal.assign(Keyword.begin(), Keyword.end()); \
776 return lltok::TOKEN; \
777 } \
778 } while (false)
779 DWKEYWORD(TAG, DwarfTag);
780 DWKEYWORD(ATE, DwarfAttEncoding);
781 DWKEYWORD(VIRTUALITY, DwarfVirtuality);
782 DWKEYWORD(LANG, DwarfLang);
783 DWKEYWORD(OP, DwarfOp);
784 DWKEYWORD(MACINFO, DwarfMacinfo);
785 #undef DWKEYWORD
786
787 if (Keyword.startswith("DIFlag")) {
788 StrVal.assign(Keyword.begin(), Keyword.end());
789 return lltok::DIFlag;
790 }
791
792 // Check for [us]0x[0-9A-Fa-f]+ which are Hexadecimal constant generated by
793 // the CFE to avoid forcing it to deal with 64-bit numbers.
794 if ((TokStart[0] == 'u' || TokStart[0] == 's') &&
795 TokStart[1] == '0' && TokStart[2] == 'x' &&
796 isxdigit(static_cast<unsigned char>(TokStart[3]))) {
797 int len = CurPtr-TokStart-3;
798 uint32_t bits = len * 4;
799 StringRef HexStr(TokStart + 3, len);
800 if (!std::all_of(HexStr.begin(), HexStr.end(), isxdigit)) {
801 // Bad token, return it as an error.
802 CurPtr = TokStart+3;
803 return lltok::Error;
804 }
805 APInt Tmp(bits, HexStr, 16);
806 uint32_t activeBits = Tmp.getActiveBits();
807 if (activeBits > 0 && activeBits < bits)
808 Tmp = Tmp.trunc(activeBits);
809 APSIntVal = APSInt(Tmp, TokStart[0] == 'u');
810 return lltok::APSInt;
811 }
812
813 // If this is "cc1234", return this as just "cc".
814 if (TokStart[0] == 'c' && TokStart[1] == 'c') {
815 CurPtr = TokStart+2;
816 return lltok::kw_cc;
817 }
818
819 // Finally, if this isn't known, return an error.
820 CurPtr = TokStart+1;
821 return lltok::Error;
822 }
823
824 /// Lex all tokens that start with a 0x prefix, knowing they match and are not
825 /// labels.
826 /// HexFPConstant 0x[0-9A-Fa-f]+
827 /// HexFP80Constant 0xK[0-9A-Fa-f]+
828 /// HexFP128Constant 0xL[0-9A-Fa-f]+
829 /// HexPPC128Constant 0xM[0-9A-Fa-f]+
830 /// HexHalfConstant 0xH[0-9A-Fa-f]+
Lex0x()831 lltok::Kind LLLexer::Lex0x() {
832 CurPtr = TokStart + 2;
833
834 char Kind;
835 if ((CurPtr[0] >= 'K' && CurPtr[0] <= 'M') || CurPtr[0] == 'H') {
836 Kind = *CurPtr++;
837 } else {
838 Kind = 'J';
839 }
840
841 if (!isxdigit(static_cast<unsigned char>(CurPtr[0]))) {
842 // Bad token, return it as an error.
843 CurPtr = TokStart+1;
844 return lltok::Error;
845 }
846
847 while (isxdigit(static_cast<unsigned char>(CurPtr[0])))
848 ++CurPtr;
849
850 if (Kind == 'J') {
851 // HexFPConstant - Floating point constant represented in IEEE format as a
852 // hexadecimal number for when exponential notation is not precise enough.
853 // Half, Float, and double only.
854 APFloatVal = APFloat(BitsToDouble(HexIntToVal(TokStart+2, CurPtr)));
855 return lltok::APFloat;
856 }
857
858 uint64_t Pair[2];
859 switch (Kind) {
860 default: llvm_unreachable("Unknown kind!");
861 case 'K':
862 // F80HexFPConstant - x87 long double in hexadecimal format (10 bytes)
863 FP80HexToIntPair(TokStart+3, CurPtr, Pair);
864 APFloatVal = APFloat(APFloat::x87DoubleExtended, APInt(80, Pair));
865 return lltok::APFloat;
866 case 'L':
867 // F128HexFPConstant - IEEE 128-bit in hexadecimal format (16 bytes)
868 HexToIntPair(TokStart+3, CurPtr, Pair);
869 APFloatVal = APFloat(APFloat::IEEEquad, APInt(128, Pair));
870 return lltok::APFloat;
871 case 'M':
872 // PPC128HexFPConstant - PowerPC 128-bit in hexadecimal format (16 bytes)
873 HexToIntPair(TokStart+3, CurPtr, Pair);
874 APFloatVal = APFloat(APFloat::PPCDoubleDouble, APInt(128, Pair));
875 return lltok::APFloat;
876 case 'H':
877 APFloatVal = APFloat(APFloat::IEEEhalf,
878 APInt(16,HexIntToVal(TokStart+3, CurPtr)));
879 return lltok::APFloat;
880 }
881 }
882
883 /// Lex tokens for a label or a numeric constant, possibly starting with -.
884 /// Label [-a-zA-Z$._0-9]+:
885 /// NInteger -[0-9]+
886 /// FPConstant [-+]?[0-9]+[.][0-9]*([eE][-+]?[0-9]+)?
887 /// PInteger [0-9]+
888 /// HexFPConstant 0x[0-9A-Fa-f]+
889 /// HexFP80Constant 0xK[0-9A-Fa-f]+
890 /// HexFP128Constant 0xL[0-9A-Fa-f]+
891 /// HexPPC128Constant 0xM[0-9A-Fa-f]+
LexDigitOrNegative()892 lltok::Kind LLLexer::LexDigitOrNegative() {
893 // If the letter after the negative is not a number, this is probably a label.
894 if (!isdigit(static_cast<unsigned char>(TokStart[0])) &&
895 !isdigit(static_cast<unsigned char>(CurPtr[0]))) {
896 // Okay, this is not a number after the -, it's probably a label.
897 if (const char *End = isLabelTail(CurPtr)) {
898 StrVal.assign(TokStart, End-1);
899 CurPtr = End;
900 return lltok::LabelStr;
901 }
902
903 return lltok::Error;
904 }
905
906 // At this point, it is either a label, int or fp constant.
907
908 // Skip digits, we have at least one.
909 for (; isdigit(static_cast<unsigned char>(CurPtr[0])); ++CurPtr)
910 /*empty*/;
911
912 // Check to see if this really is a label afterall, e.g. "-1:".
913 if (isLabelChar(CurPtr[0]) || CurPtr[0] == ':') {
914 if (const char *End = isLabelTail(CurPtr)) {
915 StrVal.assign(TokStart, End-1);
916 CurPtr = End;
917 return lltok::LabelStr;
918 }
919 }
920
921 // If the next character is a '.', then it is a fp value, otherwise its
922 // integer.
923 if (CurPtr[0] != '.') {
924 if (TokStart[0] == '0' && TokStart[1] == 'x')
925 return Lex0x();
926 APSIntVal = APSInt(StringRef(TokStart, CurPtr - TokStart));
927 return lltok::APSInt;
928 }
929
930 ++CurPtr;
931
932 // Skip over [0-9]*([eE][-+]?[0-9]+)?
933 while (isdigit(static_cast<unsigned char>(CurPtr[0]))) ++CurPtr;
934
935 if (CurPtr[0] == 'e' || CurPtr[0] == 'E') {
936 if (isdigit(static_cast<unsigned char>(CurPtr[1])) ||
937 ((CurPtr[1] == '-' || CurPtr[1] == '+') &&
938 isdigit(static_cast<unsigned char>(CurPtr[2])))) {
939 CurPtr += 2;
940 while (isdigit(static_cast<unsigned char>(CurPtr[0]))) ++CurPtr;
941 }
942 }
943
944 APFloatVal = APFloat(std::atof(TokStart));
945 return lltok::APFloat;
946 }
947
948 /// Lex a floating point constant starting with +.
949 /// FPConstant [-+]?[0-9]+[.][0-9]*([eE][-+]?[0-9]+)?
LexPositive()950 lltok::Kind LLLexer::LexPositive() {
951 // If the letter after the negative is a number, this is probably not a
952 // label.
953 if (!isdigit(static_cast<unsigned char>(CurPtr[0])))
954 return lltok::Error;
955
956 // Skip digits.
957 for (++CurPtr; isdigit(static_cast<unsigned char>(CurPtr[0])); ++CurPtr)
958 /*empty*/;
959
960 // At this point, we need a '.'.
961 if (CurPtr[0] != '.') {
962 CurPtr = TokStart+1;
963 return lltok::Error;
964 }
965
966 ++CurPtr;
967
968 // Skip over [0-9]*([eE][-+]?[0-9]+)?
969 while (isdigit(static_cast<unsigned char>(CurPtr[0]))) ++CurPtr;
970
971 if (CurPtr[0] == 'e' || CurPtr[0] == 'E') {
972 if (isdigit(static_cast<unsigned char>(CurPtr[1])) ||
973 ((CurPtr[1] == '-' || CurPtr[1] == '+') &&
974 isdigit(static_cast<unsigned char>(CurPtr[2])))) {
975 CurPtr += 2;
976 while (isdigit(static_cast<unsigned char>(CurPtr[0]))) ++CurPtr;
977 }
978 }
979
980 APFloatVal = APFloat(std::atof(TokStart));
981 return lltok::APFloat;
982 }
983