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/Support/MemoryBuffer.h"
18 #include "llvm/Support/MathExtras.h"
19 #include "llvm/Support/raw_ostream.h"
20 #include "llvm/Assembly/Parser.h"
25 bool LLLexer::Error(LocTy ErrorLoc, const std::string &Msg) const {
26 // Scan backward to find the start of the line.
27 const char *LineStart = ErrorLoc;
28 while (LineStart != CurBuf->getBufferStart() &&
29 LineStart[-1] != '\n' && LineStart[-1] != '\r')
31 // Get the end of the line.
32 const char *LineEnd = ErrorLoc;
33 while (LineEnd != CurBuf->getBufferEnd() &&
34 LineEnd[0] != '\n' && LineEnd[0] != '\r')
38 for (const char *FP = CurBuf->getBufferStart(); FP != ErrorLoc; ++FP)
39 if (*FP == '\n') ++LineNo;
41 std::string LineContents(LineStart, LineEnd);
42 ErrorInfo.setError(Msg, LineNo, ErrorLoc-LineStart, LineContents);
46 //===----------------------------------------------------------------------===//
48 //===----------------------------------------------------------------------===//
50 // atoull - Convert an ascii string of decimal digits into the unsigned long
51 // long representation... this does not have to do input error checking,
52 // because we know that the input will be matched by a suitable regex...
54 uint64_t LLLexer::atoull(const char *Buffer, const char *End) {
56 for (; Buffer != End; Buffer++) {
57 uint64_t OldRes = Result;
59 Result += *Buffer-'0';
60 if (Result < OldRes) { // Uh, oh, overflow detected!!!
61 Error("constant bigger than 64 bits detected!");
68 uint64_t LLLexer::HexIntToVal(const char *Buffer, const char *End) {
70 for (; Buffer != End; ++Buffer) {
71 uint64_t OldRes = Result;
74 if (C >= '0' && C <= '9')
76 else if (C >= 'A' && C <= 'F')
78 else if (C >= 'a' && C <= 'f')
81 if (Result < OldRes) { // Uh, oh, overflow detected!!!
82 Error("constant bigger than 64 bits detected!");
89 void LLLexer::HexToIntPair(const char *Buffer, const char *End,
92 for (int i=0; i<16; i++, Buffer++) {
93 assert(Buffer != End);
96 if (C >= '0' && C <= '9')
98 else if (C >= 'A' && C <= 'F')
100 else if (C >= 'a' && C <= 'f')
104 for (int i=0; i<16 && Buffer != End; i++, Buffer++) {
107 if (C >= '0' && C <= '9')
109 else if (C >= 'A' && C <= 'F')
111 else if (C >= 'a' && C <= 'f')
115 Error("constant bigger than 128 bits detected!");
118 /// FP80HexToIntPair - translate an 80 bit FP80 number (20 hexits) into
119 /// { low64, high16 } as usual for an APInt.
120 void LLLexer::FP80HexToIntPair(const char *Buffer, const char *End,
123 for (int i=0; i<4 && Buffer != End; i++, Buffer++) {
124 assert(Buffer != End);
127 if (C >= '0' && C <= '9')
129 else if (C >= 'A' && C <= 'F')
131 else if (C >= 'a' && C <= 'f')
135 for (int i=0; i<16; i++, Buffer++) {
138 if (C >= '0' && C <= '9')
140 else if (C >= 'A' && C <= 'F')
142 else if (C >= 'a' && C <= 'f')
146 Error("constant bigger than 128 bits detected!");
149 // UnEscapeLexed - Run through the specified buffer and change \xx codes to the
150 // appropriate character.
151 static void UnEscapeLexed(std::string &Str) {
152 if (Str.empty()) return;
154 char *Buffer = &Str[0], *EndBuffer = Buffer+Str.size();
156 for (char *BIn = Buffer; BIn != EndBuffer; ) {
157 if (BIn[0] == '\\') {
158 if (BIn < EndBuffer-1 && BIn[1] == '\\') {
159 *BOut++ = '\\'; // Two \ becomes one
161 } else if (BIn < EndBuffer-2 && isxdigit(BIn[1]) && isxdigit(BIn[2])) {
162 char Tmp = BIn[3]; BIn[3] = 0; // Terminate string
163 *BOut = (char)strtol(BIn+1, 0, 16); // Convert to number
164 BIn[3] = Tmp; // Restore character
165 BIn += 3; // Skip over handled chars
174 Str.resize(BOut-Buffer);
177 /// isLabelChar - Return true for [-a-zA-Z$._0-9].
178 static bool isLabelChar(char C) {
179 return isalnum(C) || C == '-' || C == '$' || C == '.' || C == '_';
183 /// isLabelTail - Return true if this pointer points to a valid end of a label.
184 static const char *isLabelTail(const char *CurPtr) {
186 if (CurPtr[0] == ':') return CurPtr+1;
187 if (!isLabelChar(CurPtr[0])) return 0;
194 //===----------------------------------------------------------------------===//
196 //===----------------------------------------------------------------------===//
198 LLLexer::LLLexer(MemoryBuffer *StartBuf, ParseError &Err)
199 : CurBuf(StartBuf), ErrorInfo(Err), APFloatVal(0.0) {
200 CurPtr = CurBuf->getBufferStart();
203 std::string LLLexer::getFilename() const {
204 return CurBuf->getBufferIdentifier();
207 int LLLexer::getNextChar() {
208 char CurChar = *CurPtr++;
210 default: return (unsigned char)CurChar;
212 // A nul character in the stream is either the end of the current buffer or
213 // a random nul in the file. Disambiguate that here.
214 if (CurPtr-1 != CurBuf->getBufferEnd())
215 return 0; // Just whitespace.
217 // Otherwise, return end of file.
218 --CurPtr; // Another call to lex will return EOF again.
224 lltok::Kind LLLexer::LexToken() {
227 int CurChar = getNextChar();
230 // Handle letters: [a-zA-Z_]
231 if (isalpha(CurChar) || CurChar == '_')
232 return LexIdentifier();
235 case EOF: return lltok::Eof;
241 // Ignore whitespace.
243 case '+': return LexPositive();
244 case '@': return LexAt();
245 case '%': return LexPercent();
246 case '"': return LexQuote();
248 if (const char *Ptr = isLabelTail(CurPtr)) {
250 StrVal.assign(TokStart, CurPtr-1);
251 return lltok::LabelStr;
253 if (CurPtr[0] == '.' && CurPtr[1] == '.') {
255 return lltok::dotdotdot;
259 if (const char *Ptr = isLabelTail(CurPtr)) {
261 StrVal.assign(TokStart, CurPtr-1);
262 return lltok::LabelStr;
268 case '0': case '1': case '2': case '3': case '4':
269 case '5': case '6': case '7': case '8': case '9':
271 return LexDigitOrNegative();
272 case '=': return lltok::equal;
273 case '[': return lltok::lsquare;
274 case ']': return lltok::rsquare;
275 case '{': return lltok::lbrace;
276 case '}': return lltok::rbrace;
277 case '<': return lltok::less;
278 case '>': return lltok::greater;
279 case '(': return lltok::lparen;
280 case ')': return lltok::rparen;
281 case ',': return lltok::comma;
282 case '*': return lltok::star;
283 case '\\': return lltok::backslash;
287 void LLLexer::SkipLineComment() {
289 if (CurPtr[0] == '\n' || CurPtr[0] == '\r' || getNextChar() == EOF)
294 /// LexAt - Lex all tokens that start with an @ character:
295 /// GlobalVar @\"[^\"]*\"
296 /// GlobalVar @[-a-zA-Z$._][-a-zA-Z$._0-9]*
297 /// GlobalVarID @[0-9]+
298 lltok::Kind LLLexer::LexAt() {
299 // Handle AtStringConstant: @\"[^\"]*\"
300 if (CurPtr[0] == '"') {
304 int CurChar = getNextChar();
306 if (CurChar == EOF) {
307 Error("end of file in global variable name");
310 if (CurChar == '"') {
311 StrVal.assign(TokStart+2, CurPtr-1);
312 UnEscapeLexed(StrVal);
313 return lltok::GlobalVar;
318 // Handle GlobalVarName: @[-a-zA-Z$._][-a-zA-Z$._0-9]*
319 if (isalpha(CurPtr[0]) || CurPtr[0] == '-' || CurPtr[0] == '$' ||
320 CurPtr[0] == '.' || CurPtr[0] == '_') {
322 while (isalnum(CurPtr[0]) || CurPtr[0] == '-' || CurPtr[0] == '$' ||
323 CurPtr[0] == '.' || CurPtr[0] == '_')
326 StrVal.assign(TokStart+1, CurPtr); // Skip @
327 return lltok::GlobalVar;
330 // Handle GlobalVarID: @[0-9]+
331 if (isdigit(CurPtr[0])) {
332 for (++CurPtr; isdigit(CurPtr[0]); ++CurPtr)
335 uint64_t Val = atoull(TokStart+1, CurPtr);
336 if ((unsigned)Val != Val)
337 Error("invalid value number (too large)!");
338 UIntVal = unsigned(Val);
339 return lltok::GlobalID;
346 /// LexPercent - Lex all tokens that start with a % character:
347 /// LocalVar ::= %\"[^\"]*\"
348 /// LocalVar ::= %[-a-zA-Z$._][-a-zA-Z$._0-9]*
349 /// LocalVarID ::= %[0-9]+
350 lltok::Kind LLLexer::LexPercent() {
351 // Handle LocalVarName: %\"[^\"]*\"
352 if (CurPtr[0] == '"') {
356 int CurChar = getNextChar();
358 if (CurChar == EOF) {
359 Error("end of file in string constant");
362 if (CurChar == '"') {
363 StrVal.assign(TokStart+2, CurPtr-1);
364 UnEscapeLexed(StrVal);
365 return lltok::LocalVar;
370 // Handle LocalVarName: %[-a-zA-Z$._][-a-zA-Z$._0-9]*
371 if (isalpha(CurPtr[0]) || CurPtr[0] == '-' || CurPtr[0] == '$' ||
372 CurPtr[0] == '.' || CurPtr[0] == '_') {
374 while (isalnum(CurPtr[0]) || CurPtr[0] == '-' || CurPtr[0] == '$' ||
375 CurPtr[0] == '.' || CurPtr[0] == '_')
378 StrVal.assign(TokStart+1, CurPtr); // Skip %
379 return lltok::LocalVar;
382 // Handle LocalVarID: %[0-9]+
383 if (isdigit(CurPtr[0])) {
384 for (++CurPtr; isdigit(CurPtr[0]); ++CurPtr)
387 uint64_t Val = atoull(TokStart+1, CurPtr);
388 if ((unsigned)Val != Val)
389 Error("invalid value number (too large)!");
390 UIntVal = unsigned(Val);
391 return lltok::LocalVarID;
397 /// LexQuote - Lex all tokens that start with a " character:
398 /// QuoteLabel "[^"]+":
399 /// StringConstant "[^"]*"
400 lltok::Kind LLLexer::LexQuote() {
402 int CurChar = getNextChar();
404 if (CurChar == EOF) {
405 Error("end of file in quoted string");
409 if (CurChar != '"') continue;
411 if (CurPtr[0] != ':') {
412 StrVal.assign(TokStart+1, CurPtr-1);
413 UnEscapeLexed(StrVal);
414 return lltok::StringConstant;
418 StrVal.assign(TokStart+1, CurPtr-2);
419 UnEscapeLexed(StrVal);
420 return lltok::LabelStr;
424 static bool JustWhitespaceNewLine(const char *&Ptr) {
425 const char *ThisPtr = Ptr;
426 while (*ThisPtr == ' ' || *ThisPtr == '\t')
428 if (*ThisPtr == '\n' || *ThisPtr == '\r') {
436 /// LexIdentifier: Handle several related productions:
437 /// Label [-a-zA-Z$._0-9]+:
438 /// IntegerType i[0-9]+
439 /// Keyword sdiv, float, ...
440 /// HexIntConstant [us]0x[0-9A-Fa-f]+
441 lltok::Kind LLLexer::LexIdentifier() {
442 const char *StartChar = CurPtr;
443 const char *IntEnd = CurPtr[-1] == 'i' ? 0 : StartChar;
444 const char *KeywordEnd = 0;
446 for (; isLabelChar(*CurPtr); ++CurPtr) {
447 // If we decide this is an integer, remember the end of the sequence.
448 if (!IntEnd && !isdigit(*CurPtr)) IntEnd = CurPtr;
449 if (!KeywordEnd && !isalnum(*CurPtr) && *CurPtr != '_') KeywordEnd = CurPtr;
452 // If we stopped due to a colon, this really is a label.
453 if (*CurPtr == ':') {
454 StrVal.assign(StartChar-1, CurPtr++);
455 return lltok::LabelStr;
458 // Otherwise, this wasn't a label. If this was valid as an integer type,
460 if (IntEnd == 0) IntEnd = CurPtr;
461 if (IntEnd != StartChar) {
463 uint64_t NumBits = atoull(StartChar, CurPtr);
464 if (NumBits < IntegerType::MIN_INT_BITS ||
465 NumBits > IntegerType::MAX_INT_BITS) {
466 Error("bitwidth for integer type out of range!");
469 TyVal = IntegerType::get(NumBits);
473 // Otherwise, this was a letter sequence. See which keyword this is.
474 if (KeywordEnd == 0) KeywordEnd = CurPtr;
477 unsigned Len = CurPtr-StartChar;
478 #define KEYWORD(STR) \
479 if (Len == strlen(#STR) && !memcmp(StartChar, #STR, strlen(#STR))) \
480 return lltok::kw_##STR;
482 KEYWORD(begin); KEYWORD(end);
483 KEYWORD(true); KEYWORD(false);
484 KEYWORD(declare); KEYWORD(define);
485 KEYWORD(global); KEYWORD(constant);
490 KEYWORD(linkonce_odr);
500 KEYWORD(extern_weak);
502 KEYWORD(thread_local);
503 KEYWORD(zeroinitializer);
525 KEYWORD(x86_stdcallcc);
526 KEYWORD(x86_fastcallcc);
544 KEYWORD(alwaysinline);
552 KEYWORD(eq); KEYWORD(ne); KEYWORD(slt); KEYWORD(sgt); KEYWORD(sle);
553 KEYWORD(sge); KEYWORD(ult); KEYWORD(ugt); KEYWORD(ule); KEYWORD(uge);
554 KEYWORD(oeq); KEYWORD(one); KEYWORD(olt); KEYWORD(ogt); KEYWORD(ole);
555 KEYWORD(oge); KEYWORD(ord); KEYWORD(uno); KEYWORD(ueq); KEYWORD(une);
560 // Keywords for types.
561 #define TYPEKEYWORD(STR, LLVMTY) \
562 if (Len == strlen(STR) && !memcmp(StartChar, STR, strlen(STR))) { \
563 TyVal = LLVMTY; return lltok::Type; }
564 TYPEKEYWORD("void", Type::VoidTy);
565 TYPEKEYWORD("float", Type::FloatTy);
566 TYPEKEYWORD("double", Type::DoubleTy);
567 TYPEKEYWORD("x86_fp80", Type::X86_FP80Ty);
568 TYPEKEYWORD("fp128", Type::FP128Ty);
569 TYPEKEYWORD("ppc_fp128", Type::PPC_FP128Ty);
570 TYPEKEYWORD("label", Type::LabelTy);
573 // Handle special forms for autoupgrading. Drop these in LLVM 3.0. This is
574 // to avoid conflicting with the sext/zext instructions, below.
575 if (Len == 4 && !memcmp(StartChar, "sext", 4)) {
576 // Scan CurPtr ahead, seeing if there is just whitespace before the newline.
577 if (JustWhitespaceNewLine(CurPtr))
578 return lltok::kw_signext;
579 } else if (Len == 4 && !memcmp(StartChar, "zext", 4)) {
580 // Scan CurPtr ahead, seeing if there is just whitespace before the newline.
581 if (JustWhitespaceNewLine(CurPtr))
582 return lltok::kw_zeroext;
585 // Keywords for instructions.
586 #define INSTKEYWORD(STR, Enum) \
587 if (Len == strlen(#STR) && !memcmp(StartChar, #STR, strlen(#STR))) { \
588 UIntVal = Instruction::Enum; return lltok::kw_##STR; }
590 INSTKEYWORD(add, Add); INSTKEYWORD(sub, Sub); INSTKEYWORD(mul, Mul);
591 INSTKEYWORD(udiv, UDiv); INSTKEYWORD(sdiv, SDiv); INSTKEYWORD(fdiv, FDiv);
592 INSTKEYWORD(urem, URem); INSTKEYWORD(srem, SRem); INSTKEYWORD(frem, FRem);
593 INSTKEYWORD(shl, Shl); INSTKEYWORD(lshr, LShr); INSTKEYWORD(ashr, AShr);
594 INSTKEYWORD(and, And); INSTKEYWORD(or, Or); INSTKEYWORD(xor, Xor);
595 INSTKEYWORD(icmp, ICmp); INSTKEYWORD(fcmp, FCmp);
596 INSTKEYWORD(vicmp, VICmp); INSTKEYWORD(vfcmp, VFCmp);
598 INSTKEYWORD(phi, PHI);
599 INSTKEYWORD(call, Call);
600 INSTKEYWORD(trunc, Trunc);
601 INSTKEYWORD(zext, ZExt);
602 INSTKEYWORD(sext, SExt);
603 INSTKEYWORD(fptrunc, FPTrunc);
604 INSTKEYWORD(fpext, FPExt);
605 INSTKEYWORD(uitofp, UIToFP);
606 INSTKEYWORD(sitofp, SIToFP);
607 INSTKEYWORD(fptoui, FPToUI);
608 INSTKEYWORD(fptosi, FPToSI);
609 INSTKEYWORD(inttoptr, IntToPtr);
610 INSTKEYWORD(ptrtoint, PtrToInt);
611 INSTKEYWORD(bitcast, BitCast);
612 INSTKEYWORD(select, Select);
613 INSTKEYWORD(va_arg, VAArg);
614 INSTKEYWORD(ret, Ret);
616 INSTKEYWORD(switch, Switch);
617 INSTKEYWORD(invoke, Invoke);
618 INSTKEYWORD(unwind, Unwind);
619 INSTKEYWORD(unreachable, Unreachable);
621 INSTKEYWORD(malloc, Malloc);
622 INSTKEYWORD(alloca, Alloca);
623 INSTKEYWORD(free, Free);
624 INSTKEYWORD(load, Load);
625 INSTKEYWORD(store, Store);
626 INSTKEYWORD(getelementptr, GetElementPtr);
628 INSTKEYWORD(extractelement, ExtractElement);
629 INSTKEYWORD(insertelement, InsertElement);
630 INSTKEYWORD(shufflevector, ShuffleVector);
631 INSTKEYWORD(getresult, ExtractValue);
632 INSTKEYWORD(extractvalue, ExtractValue);
633 INSTKEYWORD(insertvalue, InsertValue);
636 // Check for [us]0x[0-9A-Fa-f]+ which are Hexadecimal constant generated by
637 // the CFE to avoid forcing it to deal with 64-bit numbers.
638 if ((TokStart[0] == 'u' || TokStart[0] == 's') &&
639 TokStart[1] == '0' && TokStart[2] == 'x' && isxdigit(TokStart[3])) {
640 int len = CurPtr-TokStart-3;
641 uint32_t bits = len * 4;
642 APInt Tmp(bits, TokStart+3, len, 16);
643 uint32_t activeBits = Tmp.getActiveBits();
644 if (activeBits > 0 && activeBits < bits)
645 Tmp.trunc(activeBits);
646 APSIntVal = APSInt(Tmp, TokStart[0] == 'u');
647 return lltok::APSInt;
650 // If this is "cc1234", return this as just "cc".
651 if (TokStart[0] == 'c' && TokStart[1] == 'c') {
656 // If this starts with "call", return it as CALL. This is to support old
657 // broken .ll files. FIXME: remove this with LLVM 3.0.
658 if (CurPtr-TokStart > 4 && !memcmp(TokStart, "call", 4)) {
660 UIntVal = Instruction::Call;
661 return lltok::kw_call;
664 // Finally, if this isn't known, return an error.
670 /// Lex0x: Handle productions that start with 0x, knowing that it matches and
671 /// that this is not a label:
672 /// HexFPConstant 0x[0-9A-Fa-f]+
673 /// HexFP80Constant 0xK[0-9A-Fa-f]+
674 /// HexFP128Constant 0xL[0-9A-Fa-f]+
675 /// HexPPC128Constant 0xM[0-9A-Fa-f]+
676 lltok::Kind LLLexer::Lex0x() {
677 CurPtr = TokStart + 2;
680 if (CurPtr[0] >= 'K' && CurPtr[0] <= 'M') {
686 if (!isxdigit(CurPtr[0])) {
687 // Bad token, return it as an error.
692 while (isxdigit(CurPtr[0]))
696 // HexFPConstant - Floating point constant represented in IEEE format as a
697 // hexadecimal number for when exponential notation is not precise enough.
698 // Float and double only.
699 APFloatVal = APFloat(BitsToDouble(HexIntToVal(TokStart+2, CurPtr)));
700 return lltok::APFloat;
705 default: assert(0 && "Unknown kind!");
707 // F80HexFPConstant - x87 long double in hexadecimal format (10 bytes)
708 FP80HexToIntPair(TokStart+3, CurPtr, Pair);
709 APFloatVal = APFloat(APInt(80, 2, Pair));
710 return lltok::APFloat;
712 // F128HexFPConstant - IEEE 128-bit in hexadecimal format (16 bytes)
713 HexToIntPair(TokStart+3, CurPtr, Pair);
714 APFloatVal = APFloat(APInt(128, 2, Pair), true);
715 return lltok::APFloat;
717 // PPC128HexFPConstant - PowerPC 128-bit in hexadecimal format (16 bytes)
718 HexToIntPair(TokStart+3, CurPtr, Pair);
719 APFloatVal = APFloat(APInt(128, 2, Pair));
720 return lltok::APFloat;
724 /// LexIdentifier: Handle several related productions:
725 /// Label [-a-zA-Z$._0-9]+:
727 /// FPConstant [-+]?[0-9]+[.][0-9]*([eE][-+]?[0-9]+)?
729 /// HexFPConstant 0x[0-9A-Fa-f]+
730 /// HexFP80Constant 0xK[0-9A-Fa-f]+
731 /// HexFP128Constant 0xL[0-9A-Fa-f]+
732 /// HexPPC128Constant 0xM[0-9A-Fa-f]+
733 lltok::Kind LLLexer::LexDigitOrNegative() {
734 // If the letter after the negative is a number, this is probably a label.
735 if (!isdigit(TokStart[0]) && !isdigit(CurPtr[0])) {
736 // Okay, this is not a number after the -, it's probably a label.
737 if (const char *End = isLabelTail(CurPtr)) {
738 StrVal.assign(TokStart, End-1);
740 return lltok::LabelStr;
746 // At this point, it is either a label, int or fp constant.
748 // Skip digits, we have at least one.
749 for (; isdigit(CurPtr[0]); ++CurPtr)
752 // Check to see if this really is a label afterall, e.g. "-1:".
753 if (isLabelChar(CurPtr[0]) || CurPtr[0] == ':') {
754 if (const char *End = isLabelTail(CurPtr)) {
755 StrVal.assign(TokStart, End-1);
757 return lltok::LabelStr;
761 // If the next character is a '.', then it is a fp value, otherwise its
763 if (CurPtr[0] != '.') {
764 if (TokStart[0] == '0' && TokStart[1] == 'x')
766 unsigned Len = CurPtr-TokStart;
767 uint32_t numBits = ((Len * 64) / 19) + 2;
768 APInt Tmp(numBits, TokStart, Len, 10);
769 if (TokStart[0] == '-') {
770 uint32_t minBits = Tmp.getMinSignedBits();
771 if (minBits > 0 && minBits < numBits)
773 APSIntVal = APSInt(Tmp, false);
775 uint32_t activeBits = Tmp.getActiveBits();
776 if (activeBits > 0 && activeBits < numBits)
777 Tmp.trunc(activeBits);
778 APSIntVal = APSInt(Tmp, true);
780 return lltok::APSInt;
785 // Skip over [0-9]*([eE][-+]?[0-9]+)?
786 while (isdigit(CurPtr[0])) ++CurPtr;
788 if (CurPtr[0] == 'e' || CurPtr[0] == 'E') {
789 if (isdigit(CurPtr[1]) ||
790 ((CurPtr[1] == '-' || CurPtr[1] == '+') && isdigit(CurPtr[2]))) {
792 while (isdigit(CurPtr[0])) ++CurPtr;
796 APFloatVal = APFloat(atof(TokStart));
797 return lltok::APFloat;
800 /// FPConstant [-+]?[0-9]+[.][0-9]*([eE][-+]?[0-9]+)?
801 lltok::Kind LLLexer::LexPositive() {
802 // If the letter after the negative is a number, this is probably not a
804 if (!isdigit(CurPtr[0]))
808 for (++CurPtr; isdigit(CurPtr[0]); ++CurPtr)
811 // At this point, we need a '.'.
812 if (CurPtr[0] != '.') {
819 // Skip over [0-9]*([eE][-+]?[0-9]+)?
820 while (isdigit(CurPtr[0])) ++CurPtr;
822 if (CurPtr[0] == 'e' || CurPtr[0] == 'E') {
823 if (isdigit(CurPtr[1]) ||
824 ((CurPtr[1] == '-' || CurPtr[1] == '+') && isdigit(CurPtr[2]))) {
826 while (isdigit(CurPtr[0])) ++CurPtr;
830 APFloatVal = APFloat(atof(TokStart));
831 return lltok::APFloat;