LLLexer.cpp revision 8d2a004822f9cc5bf38d5ef14494e2f0faa82b8c
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/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" 25#include <cctype> 26#include <cstdio> 27#include <cstdlib> 28#include <cstring> 29using namespace llvm; 30 31bool LLLexer::Error(LocTy ErrorLoc, const Twine &Msg) const { 32 ErrorInfo = SM.GetMessage(ErrorLoc, SourceMgr::DK_Error, Msg); 33 return true; 34} 35 36//===----------------------------------------------------------------------===// 37// Helper functions. 38//===----------------------------------------------------------------------===// 39 40// atoull - Convert an ascii string of decimal digits into the unsigned long 41// long representation... this does not have to do input error checking, 42// because we know that the input will be matched by a suitable regex... 43// 44uint64_t LLLexer::atoull(const char *Buffer, const char *End) { 45 uint64_t Result = 0; 46 for (; Buffer != End; Buffer++) { 47 uint64_t OldRes = Result; 48 Result *= 10; 49 Result += *Buffer-'0'; 50 if (Result < OldRes) { // Uh, oh, overflow detected!!! 51 Error("constant bigger than 64 bits detected!"); 52 return 0; 53 } 54 } 55 return Result; 56} 57 58static char parseHexChar(char C) { 59 if (C >= '0' && C <= '9') 60 return C-'0'; 61 if (C >= 'A' && C <= 'F') 62 return C-'A'+10; 63 if (C >= 'a' && C <= 'f') 64 return C-'a'+10; 65 return 0; 66} 67 68uint64_t LLLexer::HexIntToVal(const char *Buffer, const char *End) { 69 uint64_t Result = 0; 70 for (; Buffer != End; ++Buffer) { 71 uint64_t OldRes = Result; 72 Result *= 16; 73 Result += parseHexChar(*Buffer); 74 75 if (Result < OldRes) { // Uh, oh, overflow detected!!! 76 Error("constant bigger than 64 bits detected!"); 77 return 0; 78 } 79 } 80 return Result; 81} 82 83void LLLexer::HexToIntPair(const char *Buffer, const char *End, 84 uint64_t Pair[2]) { 85 Pair[0] = 0; 86 for (int i=0; i<16; i++, Buffer++) { 87 assert(Buffer != End); 88 Pair[0] *= 16; 89 Pair[0] += parseHexChar(*Buffer); 90 } 91 Pair[1] = 0; 92 for (int i=0; i<16 && Buffer != End; i++, Buffer++) { 93 Pair[1] *= 16; 94 Pair[1] += parseHexChar(*Buffer); 95 } 96 if (Buffer != End) 97 Error("constant bigger than 128 bits detected!"); 98} 99 100/// FP80HexToIntPair - translate an 80 bit FP80 number (20 hexits) into 101/// { low64, high16 } as usual for an APInt. 102void LLLexer::FP80HexToIntPair(const char *Buffer, const char *End, 103 uint64_t Pair[2]) { 104 Pair[1] = 0; 105 for (int i=0; i<4 && Buffer != End; i++, Buffer++) { 106 assert(Buffer != End); 107 Pair[1] *= 16; 108 Pair[1] += parseHexChar(*Buffer); 109 } 110 Pair[0] = 0; 111 for (int i=0; i<16; i++, Buffer++) { 112 Pair[0] *= 16; 113 Pair[0] += parseHexChar(*Buffer); 114 } 115 if (Buffer != End) 116 Error("constant bigger than 128 bits detected!"); 117} 118 119// UnEscapeLexed - Run through the specified buffer and change \xx codes to the 120// appropriate character. 121static void UnEscapeLexed(std::string &Str) { 122 if (Str.empty()) return; 123 124 char *Buffer = &Str[0], *EndBuffer = Buffer+Str.size(); 125 char *BOut = Buffer; 126 for (char *BIn = Buffer; BIn != EndBuffer; ) { 127 if (BIn[0] == '\\') { 128 if (BIn < EndBuffer-1 && BIn[1] == '\\') { 129 *BOut++ = '\\'; // Two \ becomes one 130 BIn += 2; 131 } else if (BIn < EndBuffer-2 && isxdigit(BIn[1]) && isxdigit(BIn[2])) { 132 *BOut = parseHexChar(BIn[1]) * 16 + parseHexChar(BIn[2]); 133 BIn += 3; // Skip over handled chars 134 ++BOut; 135 } else { 136 *BOut++ = *BIn++; 137 } 138 } else { 139 *BOut++ = *BIn++; 140 } 141 } 142 Str.resize(BOut-Buffer); 143} 144 145/// isLabelChar - Return true for [-a-zA-Z$._0-9]. 146static bool isLabelChar(char C) { 147 return isalnum(C) || C == '-' || C == '$' || C == '.' || C == '_'; 148} 149 150 151/// isLabelTail - Return true if this pointer points to a valid end of a label. 152static const char *isLabelTail(const char *CurPtr) { 153 while (1) { 154 if (CurPtr[0] == ':') return CurPtr+1; 155 if (!isLabelChar(CurPtr[0])) return 0; 156 ++CurPtr; 157 } 158} 159 160 161 162//===----------------------------------------------------------------------===// 163// Lexer definition. 164//===----------------------------------------------------------------------===// 165 166LLLexer::LLLexer(MemoryBuffer *StartBuf, SourceMgr &sm, SMDiagnostic &Err, 167 LLVMContext &C) 168 : CurBuf(StartBuf), ErrorInfo(Err), SM(sm), Context(C), APFloatVal(0.0) { 169 CurPtr = CurBuf->getBufferStart(); 170} 171 172std::string LLLexer::getFilename() const { 173 return CurBuf->getBufferIdentifier(); 174} 175 176int LLLexer::getNextChar() { 177 char CurChar = *CurPtr++; 178 switch (CurChar) { 179 default: return (unsigned char)CurChar; 180 case 0: 181 // A nul character in the stream is either the end of the current buffer or 182 // a random nul in the file. Disambiguate that here. 183 if (CurPtr-1 != CurBuf->getBufferEnd()) 184 return 0; // Just whitespace. 185 186 // Otherwise, return end of file. 187 --CurPtr; // Another call to lex will return EOF again. 188 return EOF; 189 } 190} 191 192 193lltok::Kind LLLexer::LexToken() { 194 TokStart = CurPtr; 195 196 int CurChar = getNextChar(); 197 switch (CurChar) { 198 default: 199 // Handle letters: [a-zA-Z_] 200 if (isalpha(CurChar) || CurChar == '_') 201 return LexIdentifier(); 202 203 return lltok::Error; 204 case EOF: return lltok::Eof; 205 case 0: 206 case ' ': 207 case '\t': 208 case '\n': 209 case '\r': 210 // Ignore whitespace. 211 return LexToken(); 212 case '+': return LexPositive(); 213 case '@': return LexAt(); 214 case '%': return LexPercent(); 215 case '"': return LexQuote(); 216 case '.': 217 if (const char *Ptr = isLabelTail(CurPtr)) { 218 CurPtr = Ptr; 219 StrVal.assign(TokStart, CurPtr-1); 220 return lltok::LabelStr; 221 } 222 if (CurPtr[0] == '.' && CurPtr[1] == '.') { 223 CurPtr += 2; 224 return lltok::dotdotdot; 225 } 226 return lltok::Error; 227 case '$': 228 if (const char *Ptr = isLabelTail(CurPtr)) { 229 CurPtr = Ptr; 230 StrVal.assign(TokStart, CurPtr-1); 231 return lltok::LabelStr; 232 } 233 return lltok::Error; 234 case ';': 235 SkipLineComment(); 236 return LexToken(); 237 case '!': return LexExclaim(); 238 case '0': case '1': case '2': case '3': case '4': 239 case '5': case '6': case '7': case '8': case '9': 240 case '-': 241 return LexDigitOrNegative(); 242 case '=': return lltok::equal; 243 case '[': return lltok::lsquare; 244 case ']': return lltok::rsquare; 245 case '{': return lltok::lbrace; 246 case '}': return lltok::rbrace; 247 case '<': return lltok::less; 248 case '>': return lltok::greater; 249 case '(': return lltok::lparen; 250 case ')': return lltok::rparen; 251 case ',': return lltok::comma; 252 case '*': return lltok::star; 253 case '\\': return lltok::backslash; 254 } 255} 256 257void LLLexer::SkipLineComment() { 258 while (1) { 259 if (CurPtr[0] == '\n' || CurPtr[0] == '\r' || getNextChar() == EOF) 260 return; 261 } 262} 263 264/// LexAt - Lex all tokens that start with an @ character: 265/// GlobalVar @\"[^\"]*\" 266/// GlobalVar @[-a-zA-Z$._][-a-zA-Z$._0-9]* 267/// GlobalVarID @[0-9]+ 268lltok::Kind LLLexer::LexAt() { 269 // Handle AtStringConstant: @\"[^\"]*\" 270 if (CurPtr[0] == '"') { 271 ++CurPtr; 272 273 while (1) { 274 int CurChar = getNextChar(); 275 276 if (CurChar == EOF) { 277 Error("end of file in global variable name"); 278 return lltok::Error; 279 } 280 if (CurChar == '"') { 281 StrVal.assign(TokStart+2, CurPtr-1); 282 UnEscapeLexed(StrVal); 283 return lltok::GlobalVar; 284 } 285 } 286 } 287 288 // Handle GlobalVarName: @[-a-zA-Z$._][-a-zA-Z$._0-9]* 289 if (ReadVarName()) 290 return lltok::GlobalVar; 291 292 // Handle GlobalVarID: @[0-9]+ 293 if (isdigit(CurPtr[0])) { 294 for (++CurPtr; isdigit(CurPtr[0]); ++CurPtr) 295 /*empty*/; 296 297 uint64_t Val = atoull(TokStart+1, CurPtr); 298 if ((unsigned)Val != Val) 299 Error("invalid value number (too large)!"); 300 UIntVal = unsigned(Val); 301 return lltok::GlobalID; 302 } 303 304 return lltok::Error; 305} 306 307/// ReadString - Read a string until the closing quote. 308lltok::Kind LLLexer::ReadString(lltok::Kind kind) { 309 const char *Start = CurPtr; 310 while (1) { 311 int CurChar = getNextChar(); 312 313 if (CurChar == EOF) { 314 Error("end of file in string constant"); 315 return lltok::Error; 316 } 317 if (CurChar == '"') { 318 StrVal.assign(Start, CurPtr-1); 319 UnEscapeLexed(StrVal); 320 return kind; 321 } 322 } 323} 324 325/// ReadVarName - Read the rest of a token containing a variable name. 326bool LLLexer::ReadVarName() { 327 const char *NameStart = CurPtr; 328 if (isalpha(CurPtr[0]) || CurPtr[0] == '-' || CurPtr[0] == '$' || 329 CurPtr[0] == '.' || CurPtr[0] == '_') { 330 ++CurPtr; 331 while (isalnum(CurPtr[0]) || CurPtr[0] == '-' || CurPtr[0] == '$' || 332 CurPtr[0] == '.' || CurPtr[0] == '_') 333 ++CurPtr; 334 335 StrVal.assign(NameStart, CurPtr); 336 return true; 337 } 338 return false; 339} 340 341/// LexPercent - Lex all tokens that start with a % character: 342/// LocalVar ::= %\"[^\"]*\" 343/// LocalVar ::= %[-a-zA-Z$._][-a-zA-Z$._0-9]* 344/// LocalVarID ::= %[0-9]+ 345lltok::Kind LLLexer::LexPercent() { 346 // Handle LocalVarName: %\"[^\"]*\" 347 if (CurPtr[0] == '"') { 348 ++CurPtr; 349 return ReadString(lltok::LocalVar); 350 } 351 352 // Handle LocalVarName: %[-a-zA-Z$._][-a-zA-Z$._0-9]* 353 if (ReadVarName()) 354 return lltok::LocalVar; 355 356 // Handle LocalVarID: %[0-9]+ 357 if (isdigit(CurPtr[0])) { 358 for (++CurPtr; isdigit(CurPtr[0]); ++CurPtr) 359 /*empty*/; 360 361 uint64_t Val = atoull(TokStart+1, CurPtr); 362 if ((unsigned)Val != Val) 363 Error("invalid value number (too large)!"); 364 UIntVal = unsigned(Val); 365 return lltok::LocalVarID; 366 } 367 368 return lltok::Error; 369} 370 371/// LexQuote - Lex all tokens that start with a " character: 372/// QuoteLabel "[^"]+": 373/// StringConstant "[^"]*" 374lltok::Kind LLLexer::LexQuote() { 375 lltok::Kind kind = ReadString(lltok::StringConstant); 376 if (kind == lltok::Error || kind == lltok::Eof) 377 return kind; 378 379 if (CurPtr[0] == ':') { 380 ++CurPtr; 381 kind = lltok::LabelStr; 382 } 383 384 return kind; 385} 386 387/// LexExclaim: 388/// !foo 389/// ! 390lltok::Kind LLLexer::LexExclaim() { 391 // Lex a metadata name as a MetadataVar. 392 if (isalpha(CurPtr[0]) || CurPtr[0] == '-' || CurPtr[0] == '$' || 393 CurPtr[0] == '.' || CurPtr[0] == '_' || CurPtr[0] == '\\') { 394 ++CurPtr; 395 while (isalnum(CurPtr[0]) || CurPtr[0] == '-' || CurPtr[0] == '$' || 396 CurPtr[0] == '.' || CurPtr[0] == '_' || CurPtr[0] == '\\') 397 ++CurPtr; 398 399 StrVal.assign(TokStart+1, CurPtr); // Skip ! 400 UnEscapeLexed(StrVal); 401 return lltok::MetadataVar; 402 } 403 return lltok::exclaim; 404} 405 406/// LexIdentifier: Handle several related productions: 407/// Label [-a-zA-Z$._0-9]+: 408/// IntegerType i[0-9]+ 409/// Keyword sdiv, float, ... 410/// HexIntConstant [us]0x[0-9A-Fa-f]+ 411lltok::Kind LLLexer::LexIdentifier() { 412 const char *StartChar = CurPtr; 413 const char *IntEnd = CurPtr[-1] == 'i' ? 0 : StartChar; 414 const char *KeywordEnd = 0; 415 416 for (; isLabelChar(*CurPtr); ++CurPtr) { 417 // If we decide this is an integer, remember the end of the sequence. 418 if (!IntEnd && !isdigit(*CurPtr)) IntEnd = CurPtr; 419 if (!KeywordEnd && !isalnum(*CurPtr) && *CurPtr != '_') KeywordEnd = CurPtr; 420 } 421 422 // If we stopped due to a colon, this really is a label. 423 if (*CurPtr == ':') { 424 StrVal.assign(StartChar-1, CurPtr++); 425 return lltok::LabelStr; 426 } 427 428 // Otherwise, this wasn't a label. If this was valid as an integer type, 429 // return it. 430 if (IntEnd == 0) IntEnd = CurPtr; 431 if (IntEnd != StartChar) { 432 CurPtr = IntEnd; 433 uint64_t NumBits = atoull(StartChar, CurPtr); 434 if (NumBits < IntegerType::MIN_INT_BITS || 435 NumBits > IntegerType::MAX_INT_BITS) { 436 Error("bitwidth for integer type out of range!"); 437 return lltok::Error; 438 } 439 TyVal = IntegerType::get(Context, NumBits); 440 return lltok::Type; 441 } 442 443 // Otherwise, this was a letter sequence. See which keyword this is. 444 if (KeywordEnd == 0) KeywordEnd = CurPtr; 445 CurPtr = KeywordEnd; 446 --StartChar; 447 unsigned Len = CurPtr-StartChar; 448#define KEYWORD(STR) \ 449 if (Len == strlen(#STR) && !memcmp(StartChar, #STR, strlen(#STR))) \ 450 return lltok::kw_##STR; 451 452 KEYWORD(true); KEYWORD(false); 453 KEYWORD(declare); KEYWORD(define); 454 KEYWORD(global); KEYWORD(constant); 455 456 KEYWORD(private); 457 KEYWORD(linker_private); 458 KEYWORD(linker_private_weak); 459 KEYWORD(linker_private_weak_def_auto); 460 KEYWORD(internal); 461 KEYWORD(available_externally); 462 KEYWORD(linkonce); 463 KEYWORD(linkonce_odr); 464 KEYWORD(weak); 465 KEYWORD(weak_odr); 466 KEYWORD(appending); 467 KEYWORD(dllimport); 468 KEYWORD(dllexport); 469 KEYWORD(common); 470 KEYWORD(default); 471 KEYWORD(hidden); 472 KEYWORD(protected); 473 KEYWORD(unnamed_addr); 474 KEYWORD(extern_weak); 475 KEYWORD(external); 476 KEYWORD(thread_local); 477 KEYWORD(zeroinitializer); 478 KEYWORD(undef); 479 KEYWORD(null); 480 KEYWORD(to); 481 KEYWORD(tail); 482 KEYWORD(target); 483 KEYWORD(triple); 484 KEYWORD(unwind); 485 KEYWORD(deplibs); 486 KEYWORD(datalayout); 487 KEYWORD(volatile); 488 KEYWORD(atomic); 489 KEYWORD(unordered); 490 KEYWORD(monotonic); 491 KEYWORD(acquire); 492 KEYWORD(release); 493 KEYWORD(acq_rel); 494 KEYWORD(seq_cst); 495 KEYWORD(singlethread); 496 497 KEYWORD(nuw); 498 KEYWORD(nsw); 499 KEYWORD(exact); 500 KEYWORD(inbounds); 501 KEYWORD(align); 502 KEYWORD(addrspace); 503 KEYWORD(section); 504 KEYWORD(alias); 505 KEYWORD(module); 506 KEYWORD(asm); 507 KEYWORD(sideeffect); 508 KEYWORD(alignstack); 509 KEYWORD(gc); 510 511 KEYWORD(ccc); 512 KEYWORD(fastcc); 513 KEYWORD(coldcc); 514 KEYWORD(x86_stdcallcc); 515 KEYWORD(x86_fastcallcc); 516 KEYWORD(x86_thiscallcc); 517 KEYWORD(arm_apcscc); 518 KEYWORD(arm_aapcscc); 519 KEYWORD(arm_aapcs_vfpcc); 520 KEYWORD(msp430_intrcc); 521 KEYWORD(ptx_kernel); 522 KEYWORD(ptx_device); 523 524 KEYWORD(cc); 525 KEYWORD(c); 526 527 KEYWORD(signext); 528 KEYWORD(zeroext); 529 KEYWORD(inreg); 530 KEYWORD(sret); 531 KEYWORD(nounwind); 532 KEYWORD(noreturn); 533 KEYWORD(noalias); 534 KEYWORD(nocapture); 535 KEYWORD(byval); 536 KEYWORD(nest); 537 KEYWORD(readnone); 538 KEYWORD(readonly); 539 KEYWORD(uwtable); 540 KEYWORD(returns_twice); 541 542 KEYWORD(inlinehint); 543 KEYWORD(noinline); 544 KEYWORD(alwaysinline); 545 KEYWORD(optsize); 546 KEYWORD(ssp); 547 KEYWORD(sspreq); 548 KEYWORD(noredzone); 549 KEYWORD(noimplicitfloat); 550 KEYWORD(naked); 551 KEYWORD(nonlazybind); 552 KEYWORD(address_safety); 553 554 KEYWORD(type); 555 KEYWORD(opaque); 556 557 KEYWORD(eq); KEYWORD(ne); KEYWORD(slt); KEYWORD(sgt); KEYWORD(sle); 558 KEYWORD(sge); KEYWORD(ult); KEYWORD(ugt); KEYWORD(ule); KEYWORD(uge); 559 KEYWORD(oeq); KEYWORD(one); KEYWORD(olt); KEYWORD(ogt); KEYWORD(ole); 560 KEYWORD(oge); KEYWORD(ord); KEYWORD(uno); KEYWORD(ueq); KEYWORD(une); 561 562 KEYWORD(xchg); KEYWORD(nand); KEYWORD(max); KEYWORD(min); KEYWORD(umax); 563 KEYWORD(umin); 564 565 KEYWORD(x); 566 KEYWORD(blockaddress); 567 568 KEYWORD(personality); 569 KEYWORD(cleanup); 570 KEYWORD(catch); 571 KEYWORD(filter); 572#undef KEYWORD 573 574 // Keywords for types. 575#define TYPEKEYWORD(STR, LLVMTY) \ 576 if (Len == strlen(STR) && !memcmp(StartChar, STR, strlen(STR))) { \ 577 TyVal = LLVMTY; return lltok::Type; } 578 TYPEKEYWORD("void", Type::getVoidTy(Context)); 579 TYPEKEYWORD("half", Type::getHalfTy(Context)); 580 TYPEKEYWORD("float", Type::getFloatTy(Context)); 581 TYPEKEYWORD("double", Type::getDoubleTy(Context)); 582 TYPEKEYWORD("x86_fp80", Type::getX86_FP80Ty(Context)); 583 TYPEKEYWORD("fp128", Type::getFP128Ty(Context)); 584 TYPEKEYWORD("ppc_fp128", Type::getPPC_FP128Ty(Context)); 585 TYPEKEYWORD("label", Type::getLabelTy(Context)); 586 TYPEKEYWORD("metadata", Type::getMetadataTy(Context)); 587 TYPEKEYWORD("x86_mmx", Type::getX86_MMXTy(Context)); 588#undef TYPEKEYWORD 589 590 // Keywords for instructions. 591#define INSTKEYWORD(STR, Enum) \ 592 if (Len == strlen(#STR) && !memcmp(StartChar, #STR, strlen(#STR))) { \ 593 UIntVal = Instruction::Enum; return lltok::kw_##STR; } 594 595 INSTKEYWORD(add, Add); INSTKEYWORD(fadd, FAdd); 596 INSTKEYWORD(sub, Sub); INSTKEYWORD(fsub, FSub); 597 INSTKEYWORD(mul, Mul); INSTKEYWORD(fmul, FMul); 598 INSTKEYWORD(udiv, UDiv); INSTKEYWORD(sdiv, SDiv); INSTKEYWORD(fdiv, FDiv); 599 INSTKEYWORD(urem, URem); INSTKEYWORD(srem, SRem); INSTKEYWORD(frem, FRem); 600 INSTKEYWORD(shl, Shl); INSTKEYWORD(lshr, LShr); INSTKEYWORD(ashr, AShr); 601 INSTKEYWORD(and, And); INSTKEYWORD(or, Or); INSTKEYWORD(xor, Xor); 602 INSTKEYWORD(icmp, ICmp); INSTKEYWORD(fcmp, FCmp); 603 604 INSTKEYWORD(phi, PHI); 605 INSTKEYWORD(call, Call); 606 INSTKEYWORD(trunc, Trunc); 607 INSTKEYWORD(zext, ZExt); 608 INSTKEYWORD(sext, SExt); 609 INSTKEYWORD(fptrunc, FPTrunc); 610 INSTKEYWORD(fpext, FPExt); 611 INSTKEYWORD(uitofp, UIToFP); 612 INSTKEYWORD(sitofp, SIToFP); 613 INSTKEYWORD(fptoui, FPToUI); 614 INSTKEYWORD(fptosi, FPToSI); 615 INSTKEYWORD(inttoptr, IntToPtr); 616 INSTKEYWORD(ptrtoint, PtrToInt); 617 INSTKEYWORD(bitcast, BitCast); 618 INSTKEYWORD(select, Select); 619 INSTKEYWORD(va_arg, VAArg); 620 INSTKEYWORD(ret, Ret); 621 INSTKEYWORD(br, Br); 622 INSTKEYWORD(switch, Switch); 623 INSTKEYWORD(indirectbr, IndirectBr); 624 INSTKEYWORD(invoke, Invoke); 625 INSTKEYWORD(resume, Resume); 626 INSTKEYWORD(unreachable, Unreachable); 627 628 INSTKEYWORD(alloca, Alloca); 629 INSTKEYWORD(load, Load); 630 INSTKEYWORD(store, Store); 631 INSTKEYWORD(cmpxchg, AtomicCmpXchg); 632 INSTKEYWORD(atomicrmw, AtomicRMW); 633 INSTKEYWORD(fence, Fence); 634 INSTKEYWORD(getelementptr, GetElementPtr); 635 636 INSTKEYWORD(extractelement, ExtractElement); 637 INSTKEYWORD(insertelement, InsertElement); 638 INSTKEYWORD(shufflevector, ShuffleVector); 639 INSTKEYWORD(extractvalue, ExtractValue); 640 INSTKEYWORD(insertvalue, InsertValue); 641 INSTKEYWORD(landingpad, LandingPad); 642#undef INSTKEYWORD 643 644 // Check for [us]0x[0-9A-Fa-f]+ which are Hexadecimal constant generated by 645 // the CFE to avoid forcing it to deal with 64-bit numbers. 646 if ((TokStart[0] == 'u' || TokStart[0] == 's') && 647 TokStart[1] == '0' && TokStart[2] == 'x' && isxdigit(TokStart[3])) { 648 int len = CurPtr-TokStart-3; 649 uint32_t bits = len * 4; 650 APInt Tmp(bits, StringRef(TokStart+3, len), 16); 651 uint32_t activeBits = Tmp.getActiveBits(); 652 if (activeBits > 0 && activeBits < bits) 653 Tmp = Tmp.trunc(activeBits); 654 APSIntVal = APSInt(Tmp, TokStart[0] == 'u'); 655 return lltok::APSInt; 656 } 657 658 // If this is "cc1234", return this as just "cc". 659 if (TokStart[0] == 'c' && TokStart[1] == 'c') { 660 CurPtr = TokStart+2; 661 return lltok::kw_cc; 662 } 663 664 // Finally, if this isn't known, return an error. 665 CurPtr = TokStart+1; 666 return lltok::Error; 667} 668 669 670/// 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/// HexHalfConstant 0xH[0-9A-Fa-f]+ 677lltok::Kind LLLexer::Lex0x() { 678 CurPtr = TokStart + 2; 679 680 char Kind; 681 if ((CurPtr[0] >= 'K' && CurPtr[0] <= 'M') || CurPtr[0] == 'H') { 682 Kind = *CurPtr++; 683 } else { 684 Kind = 'J'; 685 } 686 687 if (!isxdigit(CurPtr[0])) { 688 // Bad token, return it as an error. 689 CurPtr = TokStart+1; 690 return lltok::Error; 691 } 692 693 while (isxdigit(CurPtr[0])) 694 ++CurPtr; 695 696 if (Kind == 'J') { 697 // HexFPConstant - Floating point constant represented in IEEE format as a 698 // hexadecimal number for when exponential notation is not precise enough. 699 // Half, Float, and double only. 700 APFloatVal = APFloat(BitsToDouble(HexIntToVal(TokStart+2, CurPtr))); 701 return lltok::APFloat; 702 } 703 704 uint64_t Pair[2]; 705 switch (Kind) { 706 default: llvm_unreachable("Unknown kind!"); 707 case 'K': 708 // F80HexFPConstant - x87 long double in hexadecimal format (10 bytes) 709 FP80HexToIntPair(TokStart+3, CurPtr, Pair); 710 APFloatVal = APFloat(APInt(80, Pair)); 711 return lltok::APFloat; 712 case 'L': 713 // F128HexFPConstant - IEEE 128-bit in hexadecimal format (16 bytes) 714 HexToIntPair(TokStart+3, CurPtr, Pair); 715 APFloatVal = APFloat(APInt(128, Pair), true); 716 return lltok::APFloat; 717 case 'M': 718 // PPC128HexFPConstant - PowerPC 128-bit in hexadecimal format (16 bytes) 719 HexToIntPair(TokStart+3, CurPtr, Pair); 720 APFloatVal = APFloat(APInt(128, Pair)); 721 return lltok::APFloat; 722 case 'H': 723 APFloatVal = APFloat(APInt(16,HexIntToVal(TokStart+3, CurPtr))); 724 return lltok::APFloat; 725 } 726} 727 728/// LexIdentifier: Handle several related productions: 729/// Label [-a-zA-Z$._0-9]+: 730/// NInteger -[0-9]+ 731/// FPConstant [-+]?[0-9]+[.][0-9]*([eE][-+]?[0-9]+)? 732/// PInteger [0-9]+ 733/// HexFPConstant 0x[0-9A-Fa-f]+ 734/// HexFP80Constant 0xK[0-9A-Fa-f]+ 735/// HexFP128Constant 0xL[0-9A-Fa-f]+ 736/// HexPPC128Constant 0xM[0-9A-Fa-f]+ 737lltok::Kind LLLexer::LexDigitOrNegative() { 738 // If the letter after the negative is a number, this is probably a label. 739 if (!isdigit(TokStart[0]) && !isdigit(CurPtr[0])) { 740 // Okay, this is not a number after the -, it's probably a label. 741 if (const char *End = isLabelTail(CurPtr)) { 742 StrVal.assign(TokStart, End-1); 743 CurPtr = End; 744 return lltok::LabelStr; 745 } 746 747 return lltok::Error; 748 } 749 750 // At this point, it is either a label, int or fp constant. 751 752 // Skip digits, we have at least one. 753 for (; isdigit(CurPtr[0]); ++CurPtr) 754 /*empty*/; 755 756 // Check to see if this really is a label afterall, e.g. "-1:". 757 if (isLabelChar(CurPtr[0]) || CurPtr[0] == ':') { 758 if (const char *End = isLabelTail(CurPtr)) { 759 StrVal.assign(TokStart, End-1); 760 CurPtr = End; 761 return lltok::LabelStr; 762 } 763 } 764 765 // If the next character is a '.', then it is a fp value, otherwise its 766 // integer. 767 if (CurPtr[0] != '.') { 768 if (TokStart[0] == '0' && TokStart[1] == 'x') 769 return Lex0x(); 770 unsigned Len = CurPtr-TokStart; 771 uint32_t numBits = ((Len * 64) / 19) + 2; 772 APInt Tmp(numBits, StringRef(TokStart, Len), 10); 773 if (TokStart[0] == '-') { 774 uint32_t minBits = Tmp.getMinSignedBits(); 775 if (minBits > 0 && minBits < numBits) 776 Tmp = Tmp.trunc(minBits); 777 APSIntVal = APSInt(Tmp, false); 778 } else { 779 uint32_t activeBits = Tmp.getActiveBits(); 780 if (activeBits > 0 && activeBits < numBits) 781 Tmp = Tmp.trunc(activeBits); 782 APSIntVal = APSInt(Tmp, true); 783 } 784 return lltok::APSInt; 785 } 786 787 ++CurPtr; 788 789 // Skip over [0-9]*([eE][-+]?[0-9]+)? 790 while (isdigit(CurPtr[0])) ++CurPtr; 791 792 if (CurPtr[0] == 'e' || CurPtr[0] == 'E') { 793 if (isdigit(CurPtr[1]) || 794 ((CurPtr[1] == '-' || CurPtr[1] == '+') && isdigit(CurPtr[2]))) { 795 CurPtr += 2; 796 while (isdigit(CurPtr[0])) ++CurPtr; 797 } 798 } 799 800 APFloatVal = APFloat(std::atof(TokStart)); 801 return lltok::APFloat; 802} 803 804/// FPConstant [-+]?[0-9]+[.][0-9]*([eE][-+]?[0-9]+)? 805lltok::Kind LLLexer::LexPositive() { 806 // If the letter after the negative is a number, this is probably not a 807 // label. 808 if (!isdigit(CurPtr[0])) 809 return lltok::Error; 810 811 // Skip digits. 812 for (++CurPtr; isdigit(CurPtr[0]); ++CurPtr) 813 /*empty*/; 814 815 // At this point, we need a '.'. 816 if (CurPtr[0] != '.') { 817 CurPtr = TokStart+1; 818 return lltok::Error; 819 } 820 821 ++CurPtr; 822 823 // Skip over [0-9]*([eE][-+]?[0-9]+)? 824 while (isdigit(CurPtr[0])) ++CurPtr; 825 826 if (CurPtr[0] == 'e' || CurPtr[0] == 'E') { 827 if (isdigit(CurPtr[1]) || 828 ((CurPtr[1] == '-' || CurPtr[1] == '+') && isdigit(CurPtr[2]))) { 829 CurPtr += 2; 830 while (isdigit(CurPtr[0])) ++CurPtr; 831 } 832 } 833 834 APFloatVal = APFloat(std::atof(TokStart)); 835 return lltok::APFloat; 836} 837