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 '!': return lltok::Metadata;
269 case '0': case '1': case '2': case '3': case '4':
270 case '5': case '6': case '7': case '8': case '9':
272 return LexDigitOrNegative();
273 case '=': return lltok::equal;
274 case '[': return lltok::lsquare;
275 case ']': return lltok::rsquare;
276 case '{': return lltok::lbrace;
277 case '}': return lltok::rbrace;
278 case '<': return lltok::less;
279 case '>': return lltok::greater;
280 case '(': return lltok::lparen;
281 case ')': return lltok::rparen;
282 case ',': return lltok::comma;
283 case '*': return lltok::star;
284 case '\\': return lltok::backslash;
288 void LLLexer::SkipLineComment() {
290 if (CurPtr[0] == '\n' || CurPtr[0] == '\r' || getNextChar() == EOF)
295 /// LexAt - Lex all tokens that start with an @ character:
296 /// GlobalVar @\"[^\"]*\"
297 /// GlobalVar @[-a-zA-Z$._][-a-zA-Z$._0-9]*
298 /// GlobalVarID @[0-9]+
299 lltok::Kind LLLexer::LexAt() {
300 // Handle AtStringConstant: @\"[^\"]*\"
301 if (CurPtr[0] == '"') {
305 int CurChar = getNextChar();
307 if (CurChar == EOF) {
308 Error("end of file in global variable name");
311 if (CurChar == '"') {
312 StrVal.assign(TokStart+2, CurPtr-1);
313 UnEscapeLexed(StrVal);
314 return lltok::GlobalVar;
319 // Handle GlobalVarName: @[-a-zA-Z$._][-a-zA-Z$._0-9]*
320 if (isalpha(CurPtr[0]) || CurPtr[0] == '-' || CurPtr[0] == '$' ||
321 CurPtr[0] == '.' || CurPtr[0] == '_') {
323 while (isalnum(CurPtr[0]) || CurPtr[0] == '-' || CurPtr[0] == '$' ||
324 CurPtr[0] == '.' || CurPtr[0] == '_')
327 StrVal.assign(TokStart+1, CurPtr); // Skip @
328 return lltok::GlobalVar;
331 // Handle GlobalVarID: @[0-9]+
332 if (isdigit(CurPtr[0])) {
333 for (++CurPtr; isdigit(CurPtr[0]); ++CurPtr)
336 uint64_t Val = atoull(TokStart+1, CurPtr);
337 if ((unsigned)Val != Val)
338 Error("invalid value number (too large)!");
339 UIntVal = unsigned(Val);
340 return lltok::GlobalID;
347 /// LexPercent - Lex all tokens that start with a % character:
348 /// LocalVar ::= %\"[^\"]*\"
349 /// LocalVar ::= %[-a-zA-Z$._][-a-zA-Z$._0-9]*
350 /// LocalVarID ::= %[0-9]+
351 lltok::Kind LLLexer::LexPercent() {
352 // Handle LocalVarName: %\"[^\"]*\"
353 if (CurPtr[0] == '"') {
357 int CurChar = getNextChar();
359 if (CurChar == EOF) {
360 Error("end of file in string constant");
363 if (CurChar == '"') {
364 StrVal.assign(TokStart+2, CurPtr-1);
365 UnEscapeLexed(StrVal);
366 return lltok::LocalVar;
371 // Handle LocalVarName: %[-a-zA-Z$._][-a-zA-Z$._0-9]*
372 if (isalpha(CurPtr[0]) || CurPtr[0] == '-' || CurPtr[0] == '$' ||
373 CurPtr[0] == '.' || CurPtr[0] == '_') {
375 while (isalnum(CurPtr[0]) || CurPtr[0] == '-' || CurPtr[0] == '$' ||
376 CurPtr[0] == '.' || CurPtr[0] == '_')
379 StrVal.assign(TokStart+1, CurPtr); // Skip %
380 return lltok::LocalVar;
383 // Handle LocalVarID: %[0-9]+
384 if (isdigit(CurPtr[0])) {
385 for (++CurPtr; isdigit(CurPtr[0]); ++CurPtr)
388 uint64_t Val = atoull(TokStart+1, CurPtr);
389 if ((unsigned)Val != Val)
390 Error("invalid value number (too large)!");
391 UIntVal = unsigned(Val);
392 return lltok::LocalVarID;
398 /// LexQuote - Lex all tokens that start with a " character:
399 /// QuoteLabel "[^"]+":
400 /// StringConstant "[^"]*"
401 lltok::Kind LLLexer::LexQuote() {
403 int CurChar = getNextChar();
405 if (CurChar == EOF) {
406 Error("end of file in quoted string");
410 if (CurChar != '"') continue;
412 if (CurPtr[0] != ':') {
413 StrVal.assign(TokStart+1, CurPtr-1);
414 UnEscapeLexed(StrVal);
415 return lltok::StringConstant;
419 StrVal.assign(TokStart+1, CurPtr-2);
420 UnEscapeLexed(StrVal);
421 return lltok::LabelStr;
425 static bool JustWhitespaceNewLine(const char *&Ptr) {
426 const char *ThisPtr = Ptr;
427 while (*ThisPtr == ' ' || *ThisPtr == '\t')
429 if (*ThisPtr == '\n' || *ThisPtr == '\r') {
437 /// LexIdentifier: Handle several related productions:
438 /// Label [-a-zA-Z$._0-9]+:
439 /// IntegerType i[0-9]+
440 /// Keyword sdiv, float, ...
441 /// HexIntConstant [us]0x[0-9A-Fa-f]+
442 lltok::Kind LLLexer::LexIdentifier() {
443 const char *StartChar = CurPtr;
444 const char *IntEnd = CurPtr[-1] == 'i' ? 0 : StartChar;
445 const char *KeywordEnd = 0;
447 for (; isLabelChar(*CurPtr); ++CurPtr) {
448 // If we decide this is an integer, remember the end of the sequence.
449 if (!IntEnd && !isdigit(*CurPtr)) IntEnd = CurPtr;
450 if (!KeywordEnd && !isalnum(*CurPtr) && *CurPtr != '_') KeywordEnd = CurPtr;
453 // If we stopped due to a colon, this really is a label.
454 if (*CurPtr == ':') {
455 StrVal.assign(StartChar-1, CurPtr++);
456 return lltok::LabelStr;
459 // Otherwise, this wasn't a label. If this was valid as an integer type,
461 if (IntEnd == 0) IntEnd = CurPtr;
462 if (IntEnd != StartChar) {
464 uint64_t NumBits = atoull(StartChar, CurPtr);
465 if (NumBits < IntegerType::MIN_INT_BITS ||
466 NumBits > IntegerType::MAX_INT_BITS) {
467 Error("bitwidth for integer type out of range!");
470 TyVal = IntegerType::get(NumBits);
474 // Otherwise, this was a letter sequence. See which keyword this is.
475 if (KeywordEnd == 0) KeywordEnd = CurPtr;
478 unsigned Len = CurPtr-StartChar;
479 #define KEYWORD(STR) \
480 if (Len == strlen(#STR) && !memcmp(StartChar, #STR, strlen(#STR))) \
481 return lltok::kw_##STR;
483 KEYWORD(begin); KEYWORD(end);
484 KEYWORD(true); KEYWORD(false);
485 KEYWORD(declare); KEYWORD(define);
486 KEYWORD(global); KEYWORD(constant);
490 KEYWORD(available_externally);
492 KEYWORD(linkonce_odr);
502 KEYWORD(extern_weak);
504 KEYWORD(thread_local);
505 KEYWORD(zeroinitializer);
527 KEYWORD(x86_stdcallcc);
528 KEYWORD(x86_fastcallcc);
530 KEYWORD(arm_aapcscc);
531 KEYWORD(arm_aapcs_vfpcc);
550 KEYWORD(alwaysinline);
555 KEYWORD(noimplicitfloat);
560 KEYWORD(eq); KEYWORD(ne); KEYWORD(slt); KEYWORD(sgt); KEYWORD(sle);
561 KEYWORD(sge); KEYWORD(ult); KEYWORD(ugt); KEYWORD(ule); KEYWORD(uge);
562 KEYWORD(oeq); KEYWORD(one); KEYWORD(olt); KEYWORD(ogt); KEYWORD(ole);
563 KEYWORD(oge); KEYWORD(ord); KEYWORD(uno); KEYWORD(ueq); KEYWORD(une);
568 // Keywords for types.
569 #define TYPEKEYWORD(STR, LLVMTY) \
570 if (Len == strlen(STR) && !memcmp(StartChar, STR, strlen(STR))) { \
571 TyVal = LLVMTY; return lltok::Type; }
572 TYPEKEYWORD("void", Type::VoidTy);
573 TYPEKEYWORD("float", Type::FloatTy);
574 TYPEKEYWORD("double", Type::DoubleTy);
575 TYPEKEYWORD("x86_fp80", Type::X86_FP80Ty);
576 TYPEKEYWORD("fp128", Type::FP128Ty);
577 TYPEKEYWORD("ppc_fp128", Type::PPC_FP128Ty);
578 TYPEKEYWORD("label", Type::LabelTy);
579 TYPEKEYWORD("metadata", Type::MetadataTy);
582 // Handle special forms for autoupgrading. Drop these in LLVM 3.0. This is
583 // to avoid conflicting with the sext/zext instructions, below.
584 if (Len == 4 && !memcmp(StartChar, "sext", 4)) {
585 // Scan CurPtr ahead, seeing if there is just whitespace before the newline.
586 if (JustWhitespaceNewLine(CurPtr))
587 return lltok::kw_signext;
588 } else if (Len == 4 && !memcmp(StartChar, "zext", 4)) {
589 // Scan CurPtr ahead, seeing if there is just whitespace before the newline.
590 if (JustWhitespaceNewLine(CurPtr))
591 return lltok::kw_zeroext;
594 // Keywords for instructions.
595 #define INSTKEYWORD(STR, Enum) \
596 if (Len == strlen(#STR) && !memcmp(StartChar, #STR, strlen(#STR))) { \
597 UIntVal = Instruction::Enum; return lltok::kw_##STR; }
599 INSTKEYWORD(add, Add); INSTKEYWORD(fadd, FAdd);
600 INSTKEYWORD(sub, Sub); INSTKEYWORD(fsub, FSub);
601 INSTKEYWORD(mul, Mul); INSTKEYWORD(fmul, FMul);
602 INSTKEYWORD(udiv, UDiv); INSTKEYWORD(sdiv, SDiv); INSTKEYWORD(fdiv, FDiv);
603 INSTKEYWORD(urem, URem); INSTKEYWORD(srem, SRem); INSTKEYWORD(frem, FRem);
604 INSTKEYWORD(shl, Shl); INSTKEYWORD(lshr, LShr); INSTKEYWORD(ashr, AShr);
605 INSTKEYWORD(and, And); INSTKEYWORD(or, Or); INSTKEYWORD(xor, Xor);
606 INSTKEYWORD(icmp, ICmp); INSTKEYWORD(fcmp, FCmp);
607 INSTKEYWORD(vicmp, VICmp); INSTKEYWORD(vfcmp, VFCmp);
609 INSTKEYWORD(phi, PHI);
610 INSTKEYWORD(call, Call);
611 INSTKEYWORD(trunc, Trunc);
612 INSTKEYWORD(zext, ZExt);
613 INSTKEYWORD(sext, SExt);
614 INSTKEYWORD(fptrunc, FPTrunc);
615 INSTKEYWORD(fpext, FPExt);
616 INSTKEYWORD(uitofp, UIToFP);
617 INSTKEYWORD(sitofp, SIToFP);
618 INSTKEYWORD(fptoui, FPToUI);
619 INSTKEYWORD(fptosi, FPToSI);
620 INSTKEYWORD(inttoptr, IntToPtr);
621 INSTKEYWORD(ptrtoint, PtrToInt);
622 INSTKEYWORD(bitcast, BitCast);
623 INSTKEYWORD(select, Select);
624 INSTKEYWORD(va_arg, VAArg);
625 INSTKEYWORD(ret, Ret);
627 INSTKEYWORD(switch, Switch);
628 INSTKEYWORD(invoke, Invoke);
629 INSTKEYWORD(unwind, Unwind);
630 INSTKEYWORD(unreachable, Unreachable);
632 INSTKEYWORD(malloc, Malloc);
633 INSTKEYWORD(alloca, Alloca);
634 INSTKEYWORD(free, Free);
635 INSTKEYWORD(load, Load);
636 INSTKEYWORD(store, Store);
637 INSTKEYWORD(getelementptr, GetElementPtr);
639 INSTKEYWORD(extractelement, ExtractElement);
640 INSTKEYWORD(insertelement, InsertElement);
641 INSTKEYWORD(shufflevector, ShuffleVector);
642 INSTKEYWORD(getresult, ExtractValue);
643 INSTKEYWORD(extractvalue, ExtractValue);
644 INSTKEYWORD(insertvalue, InsertValue);
647 // Check for [us]0x[0-9A-Fa-f]+ which are Hexadecimal constant generated by
648 // the CFE to avoid forcing it to deal with 64-bit numbers.
649 if ((TokStart[0] == 'u' || TokStart[0] == 's') &&
650 TokStart[1] == '0' && TokStart[2] == 'x' && isxdigit(TokStart[3])) {
651 int len = CurPtr-TokStart-3;
652 uint32_t bits = len * 4;
653 APInt Tmp(bits, TokStart+3, len, 16);
654 uint32_t activeBits = Tmp.getActiveBits();
655 if (activeBits > 0 && activeBits < bits)
656 Tmp.trunc(activeBits);
657 APSIntVal = APSInt(Tmp, TokStart[0] == 'u');
658 return lltok::APSInt;
661 // If this is "cc1234", return this as just "cc".
662 if (TokStart[0] == 'c' && TokStart[1] == 'c') {
667 // If this starts with "call", return it as CALL. This is to support old
668 // broken .ll files. FIXME: remove this with LLVM 3.0.
669 if (CurPtr-TokStart > 4 && !memcmp(TokStart, "call", 4)) {
671 UIntVal = Instruction::Call;
672 return lltok::kw_call;
675 // Finally, if this isn't known, return an error.
681 /// Lex0x: Handle productions that start with 0x, knowing that it matches and
682 /// that this is not a label:
683 /// HexFPConstant 0x[0-9A-Fa-f]+
684 /// HexFP80Constant 0xK[0-9A-Fa-f]+
685 /// HexFP128Constant 0xL[0-9A-Fa-f]+
686 /// HexPPC128Constant 0xM[0-9A-Fa-f]+
687 lltok::Kind LLLexer::Lex0x() {
688 CurPtr = TokStart + 2;
691 if (CurPtr[0] >= 'K' && CurPtr[0] <= 'M') {
697 if (!isxdigit(CurPtr[0])) {
698 // Bad token, return it as an error.
703 while (isxdigit(CurPtr[0]))
707 // HexFPConstant - Floating point constant represented in IEEE format as a
708 // hexadecimal number for when exponential notation is not precise enough.
709 // Float and double only.
710 APFloatVal = APFloat(BitsToDouble(HexIntToVal(TokStart+2, CurPtr)));
711 return lltok::APFloat;
716 default: assert(0 && "Unknown kind!");
718 // F80HexFPConstant - x87 long double in hexadecimal format (10 bytes)
719 FP80HexToIntPair(TokStart+3, CurPtr, Pair);
720 APFloatVal = APFloat(APInt(80, 2, Pair));
721 return lltok::APFloat;
723 // F128HexFPConstant - IEEE 128-bit in hexadecimal format (16 bytes)
724 HexToIntPair(TokStart+3, CurPtr, Pair);
725 APFloatVal = APFloat(APInt(128, 2, Pair), true);
726 return lltok::APFloat;
728 // PPC128HexFPConstant - PowerPC 128-bit in hexadecimal format (16 bytes)
729 HexToIntPair(TokStart+3, CurPtr, Pair);
730 APFloatVal = APFloat(APInt(128, 2, Pair));
731 return lltok::APFloat;
735 /// LexIdentifier: Handle several related productions:
736 /// Label [-a-zA-Z$._0-9]+:
738 /// FPConstant [-+]?[0-9]+[.][0-9]*([eE][-+]?[0-9]+)?
740 /// HexFPConstant 0x[0-9A-Fa-f]+
741 /// HexFP80Constant 0xK[0-9A-Fa-f]+
742 /// HexFP128Constant 0xL[0-9A-Fa-f]+
743 /// HexPPC128Constant 0xM[0-9A-Fa-f]+
744 lltok::Kind LLLexer::LexDigitOrNegative() {
745 // If the letter after the negative is a number, this is probably a label.
746 if (!isdigit(TokStart[0]) && !isdigit(CurPtr[0])) {
747 // Okay, this is not a number after the -, it's probably a label.
748 if (const char *End = isLabelTail(CurPtr)) {
749 StrVal.assign(TokStart, End-1);
751 return lltok::LabelStr;
757 // At this point, it is either a label, int or fp constant.
759 // Skip digits, we have at least one.
760 for (; isdigit(CurPtr[0]); ++CurPtr)
763 // Check to see if this really is a label afterall, e.g. "-1:".
764 if (isLabelChar(CurPtr[0]) || CurPtr[0] == ':') {
765 if (const char *End = isLabelTail(CurPtr)) {
766 StrVal.assign(TokStart, End-1);
768 return lltok::LabelStr;
772 // If the next character is a '.', then it is a fp value, otherwise its
774 if (CurPtr[0] != '.') {
775 if (TokStart[0] == '0' && TokStart[1] == 'x')
777 unsigned Len = CurPtr-TokStart;
778 uint32_t numBits = ((Len * 64) / 19) + 2;
779 APInt Tmp(numBits, TokStart, Len, 10);
780 if (TokStart[0] == '-') {
781 uint32_t minBits = Tmp.getMinSignedBits();
782 if (minBits > 0 && minBits < numBits)
784 APSIntVal = APSInt(Tmp, false);
786 uint32_t activeBits = Tmp.getActiveBits();
787 if (activeBits > 0 && activeBits < numBits)
788 Tmp.trunc(activeBits);
789 APSIntVal = APSInt(Tmp, true);
791 return lltok::APSInt;
796 // Skip over [0-9]*([eE][-+]?[0-9]+)?
797 while (isdigit(CurPtr[0])) ++CurPtr;
799 if (CurPtr[0] == 'e' || CurPtr[0] == 'E') {
800 if (isdigit(CurPtr[1]) ||
801 ((CurPtr[1] == '-' || CurPtr[1] == '+') && isdigit(CurPtr[2]))) {
803 while (isdigit(CurPtr[0])) ++CurPtr;
807 APFloatVal = APFloat(atof(TokStart));
808 return lltok::APFloat;
811 /// FPConstant [-+]?[0-9]+[.][0-9]*([eE][-+]?[0-9]+)?
812 lltok::Kind LLLexer::LexPositive() {
813 // If the letter after the negative is a number, this is probably not a
815 if (!isdigit(CurPtr[0]))
819 for (++CurPtr; isdigit(CurPtr[0]); ++CurPtr)
822 // At this point, we need a '.'.
823 if (CurPtr[0] != '.') {
830 // Skip over [0-9]*([eE][-+]?[0-9]+)?
831 while (isdigit(CurPtr[0])) ++CurPtr;
833 if (CurPtr[0] == 'e' || CurPtr[0] == 'E') {
834 if (isdigit(CurPtr[1]) ||
835 ((CurPtr[1] == '-' || CurPtr[1] == '+') && isdigit(CurPtr[2]))) {
837 while (isdigit(CurPtr[0])) ++CurPtr;
841 APFloatVal = APFloat(atof(TokStart));
842 return lltok::APFloat;