1 //===- LLLexer.cpp - Lexer for .ll Files ----------------------------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // Implement the Lexer for .ll files.
12 //===----------------------------------------------------------------------===//
15 #include "llvm/DerivedTypes.h"
16 #include "llvm/Instruction.h"
17 #include "llvm/LLVMContext.h"
18 #include "llvm/ADT/Twine.h"
19 #include "llvm/Assembly/Parser.h"
20 #include "llvm/Support/ErrorHandling.h"
21 #include "llvm/Support/MemoryBuffer.h"
22 #include "llvm/Support/MathExtras.h"
23 #include "llvm/Support/SourceMgr.h"
24 #include "llvm/Support/raw_ostream.h"
30 bool LLLexer::Error(LocTy ErrorLoc, const Twine &Msg) const {
31 ErrorInfo = SM.GetMessage(ErrorLoc, Msg, "error");
35 //===----------------------------------------------------------------------===//
37 //===----------------------------------------------------------------------===//
39 // atoull - Convert an ascii string of decimal digits into the unsigned long
40 // long representation... this does not have to do input error checking,
41 // because we know that the input will be matched by a suitable regex...
43 uint64_t LLLexer::atoull(const char *Buffer, const char *End) {
45 for (; Buffer != End; Buffer++) {
46 uint64_t OldRes = Result;
48 Result += *Buffer-'0';
49 if (Result < OldRes) { // Uh, oh, overflow detected!!!
50 Error("constant bigger than 64 bits detected!");
57 uint64_t LLLexer::HexIntToVal(const char *Buffer, const char *End) {
59 for (; Buffer != End; ++Buffer) {
60 uint64_t OldRes = Result;
63 if (C >= '0' && C <= '9')
65 else if (C >= 'A' && C <= 'F')
67 else if (C >= 'a' && C <= 'f')
70 if (Result < OldRes) { // Uh, oh, overflow detected!!!
71 Error("constant bigger than 64 bits detected!");
78 void LLLexer::HexToIntPair(const char *Buffer, const char *End,
81 for (int i=0; i<16; i++, Buffer++) {
82 assert(Buffer != End);
85 if (C >= '0' && C <= '9')
87 else if (C >= 'A' && C <= 'F')
89 else if (C >= 'a' && C <= 'f')
93 for (int i=0; i<16 && Buffer != End; i++, Buffer++) {
96 if (C >= '0' && C <= '9')
98 else if (C >= 'A' && C <= 'F')
100 else if (C >= 'a' && C <= 'f')
104 Error("constant bigger than 128 bits detected!");
107 /// FP80HexToIntPair - translate an 80 bit FP80 number (20 hexits) into
108 /// { low64, high16 } as usual for an APInt.
109 void LLLexer::FP80HexToIntPair(const char *Buffer, const char *End,
112 for (int i=0; i<4 && Buffer != End; i++, Buffer++) {
113 assert(Buffer != End);
116 if (C >= '0' && C <= '9')
118 else if (C >= 'A' && C <= 'F')
120 else if (C >= 'a' && C <= 'f')
124 for (int i=0; i<16; i++, Buffer++) {
127 if (C >= '0' && C <= '9')
129 else if (C >= 'A' && C <= 'F')
131 else if (C >= 'a' && C <= 'f')
135 Error("constant bigger than 128 bits detected!");
138 // UnEscapeLexed - Run through the specified buffer and change \xx codes to the
139 // appropriate character.
140 static void UnEscapeLexed(std::string &Str) {
141 if (Str.empty()) return;
143 char *Buffer = &Str[0], *EndBuffer = Buffer+Str.size();
145 for (char *BIn = Buffer; BIn != EndBuffer; ) {
146 if (BIn[0] == '\\') {
147 if (BIn < EndBuffer-1 && BIn[1] == '\\') {
148 *BOut++ = '\\'; // Two \ becomes one
150 } else if (BIn < EndBuffer-2 && isxdigit(BIn[1]) && isxdigit(BIn[2])) {
151 char Tmp = BIn[3]; BIn[3] = 0; // Terminate string
152 *BOut = (char)strtol(BIn+1, 0, 16); // Convert to number
153 BIn[3] = Tmp; // Restore character
154 BIn += 3; // Skip over handled chars
163 Str.resize(BOut-Buffer);
166 /// isLabelChar - Return true for [-a-zA-Z$._0-9].
167 static bool isLabelChar(char C) {
168 return isalnum(C) || C == '-' || C == '$' || C == '.' || C == '_';
172 /// isLabelTail - Return true if this pointer points to a valid end of a label.
173 static const char *isLabelTail(const char *CurPtr) {
175 if (CurPtr[0] == ':') return CurPtr+1;
176 if (!isLabelChar(CurPtr[0])) return 0;
183 //===----------------------------------------------------------------------===//
185 //===----------------------------------------------------------------------===//
187 LLLexer::LLLexer(MemoryBuffer *StartBuf, SourceMgr &sm, SMDiagnostic &Err,
189 : CurBuf(StartBuf), ErrorInfo(Err), SM(sm), Context(C), APFloatVal(0.0) {
190 CurPtr = CurBuf->getBufferStart();
193 std::string LLLexer::getFilename() const {
194 return CurBuf->getBufferIdentifier();
197 int LLLexer::getNextChar() {
198 char CurChar = *CurPtr++;
200 default: return (unsigned char)CurChar;
202 // A nul character in the stream is either the end of the current buffer or
203 // a random nul in the file. Disambiguate that here.
204 if (CurPtr-1 != CurBuf->getBufferEnd())
205 return 0; // Just whitespace.
207 // Otherwise, return end of file.
208 --CurPtr; // Another call to lex will return EOF again.
214 lltok::Kind LLLexer::LexToken() {
217 int CurChar = getNextChar();
220 // Handle letters: [a-zA-Z_]
221 if (isalpha(CurChar) || CurChar == '_')
222 return LexIdentifier();
225 case EOF: return lltok::Eof;
231 // Ignore whitespace.
233 case '+': return LexPositive();
234 case '@': return LexAt();
235 case '%': return LexPercent();
236 case '"': return LexQuote();
238 if (const char *Ptr = isLabelTail(CurPtr)) {
240 StrVal.assign(TokStart, CurPtr-1);
241 return lltok::LabelStr;
243 if (CurPtr[0] == '.' && CurPtr[1] == '.') {
245 return lltok::dotdotdot;
249 if (const char *Ptr = isLabelTail(CurPtr)) {
251 StrVal.assign(TokStart, CurPtr-1);
252 return lltok::LabelStr;
258 case '!': return LexExclaim();
259 case '0': case '1': case '2': case '3': case '4':
260 case '5': case '6': case '7': case '8': case '9':
262 return LexDigitOrNegative();
263 case '=': return lltok::equal;
264 case '[': return lltok::lsquare;
265 case ']': return lltok::rsquare;
266 case '{': return lltok::lbrace;
267 case '}': return lltok::rbrace;
268 case '<': return lltok::less;
269 case '>': return lltok::greater;
270 case '(': return lltok::lparen;
271 case ')': return lltok::rparen;
272 case ',': return lltok::comma;
273 case '*': return lltok::star;
274 case '\\': return lltok::backslash;
278 void LLLexer::SkipLineComment() {
280 if (CurPtr[0] == '\n' || CurPtr[0] == '\r' || getNextChar() == EOF)
285 /// LexAt - Lex all tokens that start with an @ character:
286 /// GlobalVar @\"[^\"]*\"
287 /// GlobalVar @[-a-zA-Z$._][-a-zA-Z$._0-9]*
288 /// GlobalVarID @[0-9]+
289 lltok::Kind LLLexer::LexAt() {
290 // Handle AtStringConstant: @\"[^\"]*\"
291 if (CurPtr[0] == '"') {
295 int CurChar = getNextChar();
297 if (CurChar == EOF) {
298 Error("end of file in global variable name");
301 if (CurChar == '"') {
302 StrVal.assign(TokStart+2, CurPtr-1);
303 UnEscapeLexed(StrVal);
304 return lltok::GlobalVar;
309 // Handle GlobalVarName: @[-a-zA-Z$._][-a-zA-Z$._0-9]*
310 if (isalpha(CurPtr[0]) || CurPtr[0] == '-' || CurPtr[0] == '$' ||
311 CurPtr[0] == '.' || CurPtr[0] == '_') {
313 while (isalnum(CurPtr[0]) || CurPtr[0] == '-' || CurPtr[0] == '$' ||
314 CurPtr[0] == '.' || CurPtr[0] == '_')
317 StrVal.assign(TokStart+1, CurPtr); // Skip @
318 return lltok::GlobalVar;
321 // Handle GlobalVarID: @[0-9]+
322 if (isdigit(CurPtr[0])) {
323 for (++CurPtr; isdigit(CurPtr[0]); ++CurPtr)
326 uint64_t Val = atoull(TokStart+1, CurPtr);
327 if ((unsigned)Val != Val)
328 Error("invalid value number (too large)!");
329 UIntVal = unsigned(Val);
330 return lltok::GlobalID;
337 /// LexPercent - Lex all tokens that start with a % character:
338 /// LocalVar ::= %\"[^\"]*\"
339 /// LocalVar ::= %[-a-zA-Z$._][-a-zA-Z$._0-9]*
340 /// LocalVarID ::= %[0-9]+
341 lltok::Kind LLLexer::LexPercent() {
342 // Handle LocalVarName: %\"[^\"]*\"
343 if (CurPtr[0] == '"') {
347 int CurChar = getNextChar();
349 if (CurChar == EOF) {
350 Error("end of file in string constant");
353 if (CurChar == '"') {
354 StrVal.assign(TokStart+2, CurPtr-1);
355 UnEscapeLexed(StrVal);
356 return lltok::LocalVar;
361 // Handle LocalVarName: %[-a-zA-Z$._][-a-zA-Z$._0-9]*
362 if (isalpha(CurPtr[0]) || CurPtr[0] == '-' || CurPtr[0] == '$' ||
363 CurPtr[0] == '.' || CurPtr[0] == '_') {
365 while (isalnum(CurPtr[0]) || CurPtr[0] == '-' || CurPtr[0] == '$' ||
366 CurPtr[0] == '.' || CurPtr[0] == '_')
369 StrVal.assign(TokStart+1, CurPtr); // Skip %
370 return lltok::LocalVar;
373 // Handle LocalVarID: %[0-9]+
374 if (isdigit(CurPtr[0])) {
375 for (++CurPtr; isdigit(CurPtr[0]); ++CurPtr)
378 uint64_t Val = atoull(TokStart+1, CurPtr);
379 if ((unsigned)Val != Val)
380 Error("invalid value number (too large)!");
381 UIntVal = unsigned(Val);
382 return lltok::LocalVarID;
388 /// LexQuote - Lex all tokens that start with a " character:
389 /// QuoteLabel "[^"]+":
390 /// StringConstant "[^"]*"
391 lltok::Kind LLLexer::LexQuote() {
393 int CurChar = getNextChar();
395 if (CurChar == EOF) {
396 Error("end of file in quoted string");
400 if (CurChar != '"') continue;
402 if (CurPtr[0] != ':') {
403 StrVal.assign(TokStart+1, CurPtr-1);
404 UnEscapeLexed(StrVal);
405 return lltok::StringConstant;
409 StrVal.assign(TokStart+1, CurPtr-2);
410 UnEscapeLexed(StrVal);
411 return lltok::LabelStr;
415 static bool JustWhitespaceNewLine(const char *&Ptr) {
416 const char *ThisPtr = Ptr;
417 while (*ThisPtr == ' ' || *ThisPtr == '\t')
419 if (*ThisPtr == '\n' || *ThisPtr == '\r') {
429 lltok::Kind LLLexer::LexExclaim() {
430 // Lex a metadata name as a MetadataVar.
431 if (isalpha(CurPtr[0])) {
433 while (isalnum(CurPtr[0]) || CurPtr[0] == '-' || CurPtr[0] == '$' ||
434 CurPtr[0] == '.' || CurPtr[0] == '_')
437 StrVal.assign(TokStart+1, CurPtr); // Skip !
438 return lltok::MetadataVar;
440 return lltok::exclaim;
443 /// LexIdentifier: Handle several related productions:
444 /// Label [-a-zA-Z$._0-9]+:
445 /// IntegerType i[0-9]+
446 /// Keyword sdiv, float, ...
447 /// HexIntConstant [us]0x[0-9A-Fa-f]+
448 lltok::Kind LLLexer::LexIdentifier() {
449 const char *StartChar = CurPtr;
450 const char *IntEnd = CurPtr[-1] == 'i' ? 0 : StartChar;
451 const char *KeywordEnd = 0;
453 for (; isLabelChar(*CurPtr); ++CurPtr) {
454 // If we decide this is an integer, remember the end of the sequence.
455 if (!IntEnd && !isdigit(*CurPtr)) IntEnd = CurPtr;
456 if (!KeywordEnd && !isalnum(*CurPtr) && *CurPtr != '_') KeywordEnd = CurPtr;
459 // If we stopped due to a colon, this really is a label.
460 if (*CurPtr == ':') {
461 StrVal.assign(StartChar-1, CurPtr++);
462 return lltok::LabelStr;
465 // Otherwise, this wasn't a label. If this was valid as an integer type,
467 if (IntEnd == 0) IntEnd = CurPtr;
468 if (IntEnd != StartChar) {
470 uint64_t NumBits = atoull(StartChar, CurPtr);
471 if (NumBits < IntegerType::MIN_INT_BITS ||
472 NumBits > IntegerType::MAX_INT_BITS) {
473 Error("bitwidth for integer type out of range!");
476 TyVal = IntegerType::get(Context, NumBits);
480 // Otherwise, this was a letter sequence. See which keyword this is.
481 if (KeywordEnd == 0) KeywordEnd = CurPtr;
484 unsigned Len = CurPtr-StartChar;
485 #define KEYWORD(STR) \
486 if (Len == strlen(#STR) && !memcmp(StartChar, #STR, strlen(#STR))) \
487 return lltok::kw_##STR;
489 KEYWORD(begin); KEYWORD(end);
490 KEYWORD(true); KEYWORD(false);
491 KEYWORD(declare); KEYWORD(define);
492 KEYWORD(global); KEYWORD(constant);
495 KEYWORD(linker_private);
496 KEYWORD(linker_private_weak);
497 KEYWORD(linker_private_weak_def_auto);
499 KEYWORD(available_externally);
501 KEYWORD(linkonce_odr);
511 KEYWORD(extern_weak);
513 KEYWORD(thread_local);
514 KEYWORD(zeroinitializer);
541 KEYWORD(x86_stdcallcc);
542 KEYWORD(x86_fastcallcc);
543 KEYWORD(x86_thiscallcc);
545 KEYWORD(arm_aapcscc);
546 KEYWORD(arm_aapcs_vfpcc);
547 KEYWORD(msp430_intrcc);
569 KEYWORD(alwaysinline);
574 KEYWORD(noimplicitfloat);
581 KEYWORD(eq); KEYWORD(ne); KEYWORD(slt); KEYWORD(sgt); KEYWORD(sle);
582 KEYWORD(sge); KEYWORD(ult); KEYWORD(ugt); KEYWORD(ule); KEYWORD(uge);
583 KEYWORD(oeq); KEYWORD(one); KEYWORD(olt); KEYWORD(ogt); KEYWORD(ole);
584 KEYWORD(oge); KEYWORD(ord); KEYWORD(uno); KEYWORD(ueq); KEYWORD(une);
587 KEYWORD(blockaddress);
590 // Keywords for types.
591 #define TYPEKEYWORD(STR, LLVMTY) \
592 if (Len == strlen(STR) && !memcmp(StartChar, STR, strlen(STR))) { \
593 TyVal = LLVMTY; return lltok::Type; }
594 TYPEKEYWORD("void", Type::getVoidTy(Context));
595 TYPEKEYWORD("float", Type::getFloatTy(Context));
596 TYPEKEYWORD("double", Type::getDoubleTy(Context));
597 TYPEKEYWORD("x86_fp80", Type::getX86_FP80Ty(Context));
598 TYPEKEYWORD("fp128", Type::getFP128Ty(Context));
599 TYPEKEYWORD("ppc_fp128", Type::getPPC_FP128Ty(Context));
600 TYPEKEYWORD("label", Type::getLabelTy(Context));
601 TYPEKEYWORD("metadata", Type::getMetadataTy(Context));
602 TYPEKEYWORD("x86_mmx", Type::getX86_MMXTy(Context));
605 // Handle special forms for autoupgrading. Drop these in LLVM 3.0. This is
606 // to avoid conflicting with the sext/zext instructions, below.
607 if (Len == 4 && !memcmp(StartChar, "sext", 4)) {
608 // Scan CurPtr ahead, seeing if there is just whitespace before the newline.
609 if (JustWhitespaceNewLine(CurPtr))
610 return lltok::kw_signext;
611 } else if (Len == 4 && !memcmp(StartChar, "zext", 4)) {
612 // Scan CurPtr ahead, seeing if there is just whitespace before the newline.
613 if (JustWhitespaceNewLine(CurPtr))
614 return lltok::kw_zeroext;
615 } else if (Len == 6 && !memcmp(StartChar, "malloc", 6)) {
616 // FIXME: Remove in LLVM 3.0.
617 // Autoupgrade malloc instruction.
618 return lltok::kw_malloc;
619 } else if (Len == 4 && !memcmp(StartChar, "free", 4)) {
620 // FIXME: Remove in LLVM 3.0.
621 // Autoupgrade malloc instruction.
622 return lltok::kw_free;
625 // Keywords for instructions.
626 #define INSTKEYWORD(STR, Enum) \
627 if (Len == strlen(#STR) && !memcmp(StartChar, #STR, strlen(#STR))) { \
628 UIntVal = Instruction::Enum; return lltok::kw_##STR; }
630 INSTKEYWORD(add, Add); INSTKEYWORD(fadd, FAdd);
631 INSTKEYWORD(sub, Sub); INSTKEYWORD(fsub, FSub);
632 INSTKEYWORD(mul, Mul); INSTKEYWORD(fmul, FMul);
633 INSTKEYWORD(udiv, UDiv); INSTKEYWORD(sdiv, SDiv); INSTKEYWORD(fdiv, FDiv);
634 INSTKEYWORD(urem, URem); INSTKEYWORD(srem, SRem); INSTKEYWORD(frem, FRem);
635 INSTKEYWORD(shl, Shl); INSTKEYWORD(lshr, LShr); INSTKEYWORD(ashr, AShr);
636 INSTKEYWORD(and, And); INSTKEYWORD(or, Or); INSTKEYWORD(xor, Xor);
637 INSTKEYWORD(icmp, ICmp); INSTKEYWORD(fcmp, FCmp);
639 INSTKEYWORD(phi, PHI);
640 INSTKEYWORD(call, Call);
641 INSTKEYWORD(trunc, Trunc);
642 INSTKEYWORD(zext, ZExt);
643 INSTKEYWORD(sext, SExt);
644 INSTKEYWORD(fptrunc, FPTrunc);
645 INSTKEYWORD(fpext, FPExt);
646 INSTKEYWORD(uitofp, UIToFP);
647 INSTKEYWORD(sitofp, SIToFP);
648 INSTKEYWORD(fptoui, FPToUI);
649 INSTKEYWORD(fptosi, FPToSI);
650 INSTKEYWORD(inttoptr, IntToPtr);
651 INSTKEYWORD(ptrtoint, PtrToInt);
652 INSTKEYWORD(bitcast, BitCast);
653 INSTKEYWORD(select, Select);
654 INSTKEYWORD(va_arg, VAArg);
655 INSTKEYWORD(ret, Ret);
657 INSTKEYWORD(switch, Switch);
658 INSTKEYWORD(indirectbr, IndirectBr);
659 INSTKEYWORD(invoke, Invoke);
660 INSTKEYWORD(unwind, Unwind);
661 INSTKEYWORD(unreachable, Unreachable);
663 INSTKEYWORD(alloca, Alloca);
664 INSTKEYWORD(load, Load);
665 INSTKEYWORD(store, Store);
666 INSTKEYWORD(getelementptr, GetElementPtr);
668 INSTKEYWORD(extractelement, ExtractElement);
669 INSTKEYWORD(insertelement, InsertElement);
670 INSTKEYWORD(shufflevector, ShuffleVector);
671 INSTKEYWORD(getresult, ExtractValue);
672 INSTKEYWORD(extractvalue, ExtractValue);
673 INSTKEYWORD(insertvalue, InsertValue);
676 // Check for [us]0x[0-9A-Fa-f]+ which are Hexadecimal constant generated by
677 // the CFE to avoid forcing it to deal with 64-bit numbers.
678 if ((TokStart[0] == 'u' || TokStart[0] == 's') &&
679 TokStart[1] == '0' && TokStart[2] == 'x' && isxdigit(TokStart[3])) {
680 int len = CurPtr-TokStart-3;
681 uint32_t bits = len * 4;
682 APInt Tmp(bits, StringRef(TokStart+3, len), 16);
683 uint32_t activeBits = Tmp.getActiveBits();
684 if (activeBits > 0 && activeBits < bits)
685 Tmp = Tmp.trunc(activeBits);
686 APSIntVal = APSInt(Tmp, TokStart[0] == 'u');
687 return lltok::APSInt;
690 // If this is "cc1234", return this as just "cc".
691 if (TokStart[0] == 'c' && TokStart[1] == 'c') {
696 // If this starts with "call", return it as CALL. This is to support old
697 // broken .ll files. FIXME: remove this with LLVM 3.0.
698 if (CurPtr-TokStart > 4 && !memcmp(TokStart, "call", 4)) {
700 UIntVal = Instruction::Call;
701 return lltok::kw_call;
704 // Finally, if this isn't known, return an error.
710 /// Lex0x: Handle productions that start with 0x, knowing that it matches and
711 /// that this is not a label:
712 /// HexFPConstant 0x[0-9A-Fa-f]+
713 /// HexFP80Constant 0xK[0-9A-Fa-f]+
714 /// HexFP128Constant 0xL[0-9A-Fa-f]+
715 /// HexPPC128Constant 0xM[0-9A-Fa-f]+
716 lltok::Kind LLLexer::Lex0x() {
717 CurPtr = TokStart + 2;
720 if (CurPtr[0] >= 'K' && CurPtr[0] <= 'M') {
726 if (!isxdigit(CurPtr[0])) {
727 // Bad token, return it as an error.
732 while (isxdigit(CurPtr[0]))
736 // HexFPConstant - Floating point constant represented in IEEE format as a
737 // hexadecimal number for when exponential notation is not precise enough.
738 // Float and double only.
739 APFloatVal = APFloat(BitsToDouble(HexIntToVal(TokStart+2, CurPtr)));
740 return lltok::APFloat;
745 default: llvm_unreachable("Unknown kind!");
747 // F80HexFPConstant - x87 long double in hexadecimal format (10 bytes)
748 FP80HexToIntPair(TokStart+3, CurPtr, Pair);
749 APFloatVal = APFloat(APInt(80, 2, Pair));
750 return lltok::APFloat;
752 // F128HexFPConstant - IEEE 128-bit in hexadecimal format (16 bytes)
753 HexToIntPair(TokStart+3, CurPtr, Pair);
754 APFloatVal = APFloat(APInt(128, 2, Pair), true);
755 return lltok::APFloat;
757 // PPC128HexFPConstant - PowerPC 128-bit in hexadecimal format (16 bytes)
758 HexToIntPair(TokStart+3, CurPtr, Pair);
759 APFloatVal = APFloat(APInt(128, 2, Pair));
760 return lltok::APFloat;
764 /// LexIdentifier: Handle several related productions:
765 /// Label [-a-zA-Z$._0-9]+:
767 /// FPConstant [-+]?[0-9]+[.][0-9]*([eE][-+]?[0-9]+)?
769 /// HexFPConstant 0x[0-9A-Fa-f]+
770 /// HexFP80Constant 0xK[0-9A-Fa-f]+
771 /// HexFP128Constant 0xL[0-9A-Fa-f]+
772 /// HexPPC128Constant 0xM[0-9A-Fa-f]+
773 lltok::Kind LLLexer::LexDigitOrNegative() {
774 // If the letter after the negative is a number, this is probably a label.
775 if (!isdigit(TokStart[0]) && !isdigit(CurPtr[0])) {
776 // Okay, this is not a number after the -, it's probably a label.
777 if (const char *End = isLabelTail(CurPtr)) {
778 StrVal.assign(TokStart, End-1);
780 return lltok::LabelStr;
786 // At this point, it is either a label, int or fp constant.
788 // Skip digits, we have at least one.
789 for (; isdigit(CurPtr[0]); ++CurPtr)
792 // Check to see if this really is a label afterall, e.g. "-1:".
793 if (isLabelChar(CurPtr[0]) || CurPtr[0] == ':') {
794 if (const char *End = isLabelTail(CurPtr)) {
795 StrVal.assign(TokStart, End-1);
797 return lltok::LabelStr;
801 // If the next character is a '.', then it is a fp value, otherwise its
803 if (CurPtr[0] != '.') {
804 if (TokStart[0] == '0' && TokStart[1] == 'x')
806 unsigned Len = CurPtr-TokStart;
807 uint32_t numBits = ((Len * 64) / 19) + 2;
808 APInt Tmp(numBits, StringRef(TokStart, Len), 10);
809 if (TokStart[0] == '-') {
810 uint32_t minBits = Tmp.getMinSignedBits();
811 if (minBits > 0 && minBits < numBits)
812 Tmp = Tmp.trunc(minBits);
813 APSIntVal = APSInt(Tmp, false);
815 uint32_t activeBits = Tmp.getActiveBits();
816 if (activeBits > 0 && activeBits < numBits)
817 Tmp = Tmp.trunc(activeBits);
818 APSIntVal = APSInt(Tmp, true);
820 return lltok::APSInt;
825 // Skip over [0-9]*([eE][-+]?[0-9]+)?
826 while (isdigit(CurPtr[0])) ++CurPtr;
828 if (CurPtr[0] == 'e' || CurPtr[0] == 'E') {
829 if (isdigit(CurPtr[1]) ||
830 ((CurPtr[1] == '-' || CurPtr[1] == '+') && isdigit(CurPtr[2]))) {
832 while (isdigit(CurPtr[0])) ++CurPtr;
836 APFloatVal = APFloat(atof(TokStart));
837 return lltok::APFloat;
840 /// FPConstant [-+]?[0-9]+[.][0-9]*([eE][-+]?[0-9]+)?
841 lltok::Kind LLLexer::LexPositive() {
842 // If the letter after the negative is a number, this is probably not a
844 if (!isdigit(CurPtr[0]))
848 for (++CurPtr; isdigit(CurPtr[0]); ++CurPtr)
851 // At this point, we need a '.'.
852 if (CurPtr[0] != '.') {
859 // Skip over [0-9]*([eE][-+]?[0-9]+)?
860 while (isdigit(CurPtr[0])) ++CurPtr;
862 if (CurPtr[0] == 'e' || CurPtr[0] == 'E') {
863 if (isdigit(CurPtr[1]) ||
864 ((CurPtr[1] == '-' || CurPtr[1] == '+') && isdigit(CurPtr[2]))) {
866 while (isdigit(CurPtr[0])) ++CurPtr;
870 APFloatVal = APFloat(atof(TokStart));
871 return lltok::APFloat;