LLLexer.cpp revision 1224c386981f7948f298ed9ad444c40609570f2e
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/Support/ErrorHandling.h" 19#include "llvm/Support/MemoryBuffer.h" 20#include "llvm/Support/MathExtras.h" 21#include "llvm/Support/SourceMgr.h" 22#include "llvm/Support/raw_ostream.h" 23#include "llvm/Assembly/Parser.h" 24#include <cstdlib> 25#include <cstring> 26using namespace llvm; 27 28bool LLLexer::Error(LocTy ErrorLoc, const std::string &Msg) const { 29 ErrorInfo = SM.GetMessage(ErrorLoc, Msg, "error"); 30 return true; 31} 32 33//===----------------------------------------------------------------------===// 34// Helper functions. 35//===----------------------------------------------------------------------===// 36 37// atoull - Convert an ascii string of decimal digits into the unsigned long 38// long representation... this does not have to do input error checking, 39// because we know that the input will be matched by a suitable regex... 40// 41uint64_t LLLexer::atoull(const char *Buffer, const char *End) { 42 uint64_t Result = 0; 43 for (; Buffer != End; Buffer++) { 44 uint64_t OldRes = Result; 45 Result *= 10; 46 Result += *Buffer-'0'; 47 if (Result < OldRes) { // Uh, oh, overflow detected!!! 48 Error("constant bigger than 64 bits detected!"); 49 return 0; 50 } 51 } 52 return Result; 53} 54 55uint64_t LLLexer::HexIntToVal(const char *Buffer, const char *End) { 56 uint64_t Result = 0; 57 for (; Buffer != End; ++Buffer) { 58 uint64_t OldRes = Result; 59 Result *= 16; 60 char C = *Buffer; 61 if (C >= '0' && C <= '9') 62 Result += C-'0'; 63 else if (C >= 'A' && C <= 'F') 64 Result += C-'A'+10; 65 else if (C >= 'a' && C <= 'f') 66 Result += C-'a'+10; 67 68 if (Result < OldRes) { // Uh, oh, overflow detected!!! 69 Error("constant bigger than 64 bits detected!"); 70 return 0; 71 } 72 } 73 return Result; 74} 75 76void LLLexer::HexToIntPair(const char *Buffer, const char *End, 77 uint64_t Pair[2]) { 78 Pair[0] = 0; 79 for (int i=0; i<16; i++, Buffer++) { 80 assert(Buffer != End); 81 Pair[0] *= 16; 82 char C = *Buffer; 83 if (C >= '0' && C <= '9') 84 Pair[0] += C-'0'; 85 else if (C >= 'A' && C <= 'F') 86 Pair[0] += C-'A'+10; 87 else if (C >= 'a' && C <= 'f') 88 Pair[0] += C-'a'+10; 89 } 90 Pair[1] = 0; 91 for (int i=0; i<16 && Buffer != End; i++, Buffer++) { 92 Pair[1] *= 16; 93 char C = *Buffer; 94 if (C >= '0' && C <= '9') 95 Pair[1] += C-'0'; 96 else if (C >= 'A' && C <= 'F') 97 Pair[1] += C-'A'+10; 98 else if (C >= 'a' && C <= 'f') 99 Pair[1] += C-'a'+10; 100 } 101 if (Buffer != End) 102 Error("constant bigger than 128 bits detected!"); 103} 104 105/// FP80HexToIntPair - translate an 80 bit FP80 number (20 hexits) into 106/// { low64, high16 } as usual for an APInt. 107void LLLexer::FP80HexToIntPair(const char *Buffer, const char *End, 108 uint64_t Pair[2]) { 109 Pair[1] = 0; 110 for (int i=0; i<4 && Buffer != End; i++, Buffer++) { 111 assert(Buffer != End); 112 Pair[1] *= 16; 113 char C = *Buffer; 114 if (C >= '0' && C <= '9') 115 Pair[1] += C-'0'; 116 else if (C >= 'A' && C <= 'F') 117 Pair[1] += C-'A'+10; 118 else if (C >= 'a' && C <= 'f') 119 Pair[1] += C-'a'+10; 120 } 121 Pair[0] = 0; 122 for (int i=0; i<16; i++, Buffer++) { 123 Pair[0] *= 16; 124 char C = *Buffer; 125 if (C >= '0' && C <= '9') 126 Pair[0] += C-'0'; 127 else if (C >= 'A' && C <= 'F') 128 Pair[0] += C-'A'+10; 129 else if (C >= 'a' && C <= 'f') 130 Pair[0] += C-'a'+10; 131 } 132 if (Buffer != End) 133 Error("constant bigger than 128 bits detected!"); 134} 135 136// UnEscapeLexed - Run through the specified buffer and change \xx codes to the 137// appropriate character. 138static void UnEscapeLexed(std::string &Str) { 139 if (Str.empty()) return; 140 141 char *Buffer = &Str[0], *EndBuffer = Buffer+Str.size(); 142 char *BOut = Buffer; 143 for (char *BIn = Buffer; BIn != EndBuffer; ) { 144 if (BIn[0] == '\\') { 145 if (BIn < EndBuffer-1 && BIn[1] == '\\') { 146 *BOut++ = '\\'; // Two \ becomes one 147 BIn += 2; 148 } else if (BIn < EndBuffer-2 && isxdigit(BIn[1]) && isxdigit(BIn[2])) { 149 char Tmp = BIn[3]; BIn[3] = 0; // Terminate string 150 *BOut = (char)strtol(BIn+1, 0, 16); // Convert to number 151 BIn[3] = Tmp; // Restore character 152 BIn += 3; // Skip over handled chars 153 ++BOut; 154 } else { 155 *BOut++ = *BIn++; 156 } 157 } else { 158 *BOut++ = *BIn++; 159 } 160 } 161 Str.resize(BOut-Buffer); 162} 163 164/// isLabelChar - Return true for [-a-zA-Z$._0-9]. 165static bool isLabelChar(char C) { 166 return isalnum(C) || C == '-' || C == '$' || C == '.' || C == '_'; 167} 168 169 170/// isLabelTail - Return true if this pointer points to a valid end of a label. 171static const char *isLabelTail(const char *CurPtr) { 172 while (1) { 173 if (CurPtr[0] == ':') return CurPtr+1; 174 if (!isLabelChar(CurPtr[0])) return 0; 175 ++CurPtr; 176 } 177} 178 179 180 181//===----------------------------------------------------------------------===// 182// Lexer definition. 183//===----------------------------------------------------------------------===// 184 185LLLexer::LLLexer(MemoryBuffer *StartBuf, SourceMgr &sm, SMDiagnostic &Err, 186 LLVMContext &C) 187 : CurBuf(StartBuf), ErrorInfo(Err), SM(sm), Context(C), APFloatVal(0.0) { 188 CurPtr = CurBuf->getBufferStart(); 189} 190 191std::string LLLexer::getFilename() const { 192 return CurBuf->getBufferIdentifier(); 193} 194 195int LLLexer::getNextChar() { 196 char CurChar = *CurPtr++; 197 switch (CurChar) { 198 default: return (unsigned char)CurChar; 199 case 0: 200 // A nul character in the stream is either the end of the current buffer or 201 // a random nul in the file. Disambiguate that here. 202 if (CurPtr-1 != CurBuf->getBufferEnd()) 203 return 0; // Just whitespace. 204 205 // Otherwise, return end of file. 206 --CurPtr; // Another call to lex will return EOF again. 207 return EOF; 208 } 209} 210 211 212lltok::Kind LLLexer::LexToken() { 213 TokStart = CurPtr; 214 215 int CurChar = getNextChar(); 216 switch (CurChar) { 217 default: 218 // Handle letters: [a-zA-Z_] 219 if (isalpha(CurChar) || CurChar == '_') 220 return LexIdentifier(); 221 222 return lltok::Error; 223 case EOF: return lltok::Eof; 224 case 0: 225 case ' ': 226 case '\t': 227 case '\n': 228 case '\r': 229 // Ignore whitespace. 230 return LexToken(); 231 case '+': return LexPositive(); 232 case '@': return LexAt(); 233 case '%': return LexPercent(); 234 case '"': return LexQuote(); 235 case '.': 236 if (const char *Ptr = isLabelTail(CurPtr)) { 237 CurPtr = Ptr; 238 StrVal.assign(TokStart, CurPtr-1); 239 return lltok::LabelStr; 240 } 241 if (CurPtr[0] == '.' && CurPtr[1] == '.') { 242 CurPtr += 2; 243 return lltok::dotdotdot; 244 } 245 return lltok::Error; 246 case '$': 247 if (const char *Ptr = isLabelTail(CurPtr)) { 248 CurPtr = Ptr; 249 StrVal.assign(TokStart, CurPtr-1); 250 return lltok::LabelStr; 251 } 252 return lltok::Error; 253 case ';': 254 SkipLineComment(); 255 return LexToken(); 256 case '!': return lltok::Metadata; 257 case '0': case '1': case '2': case '3': case '4': 258 case '5': case '6': case '7': case '8': case '9': 259 case '-': 260 return LexDigitOrNegative(); 261 case '=': return lltok::equal; 262 case '[': return lltok::lsquare; 263 case ']': return lltok::rsquare; 264 case '{': return lltok::lbrace; 265 case '}': return lltok::rbrace; 266 case '<': return lltok::less; 267 case '>': return lltok::greater; 268 case '(': return lltok::lparen; 269 case ')': return lltok::rparen; 270 case ',': return lltok::comma; 271 case '*': return lltok::star; 272 case '\\': return lltok::backslash; 273 } 274} 275 276void LLLexer::SkipLineComment() { 277 while (1) { 278 if (CurPtr[0] == '\n' || CurPtr[0] == '\r' || getNextChar() == EOF) 279 return; 280 } 281} 282 283/// LexAt - Lex all tokens that start with an @ character: 284/// GlobalVar @\"[^\"]*\" 285/// GlobalVar @[-a-zA-Z$._][-a-zA-Z$._0-9]* 286/// GlobalVarID @[0-9]+ 287lltok::Kind LLLexer::LexAt() { 288 // Handle AtStringConstant: @\"[^\"]*\" 289 if (CurPtr[0] == '"') { 290 ++CurPtr; 291 292 while (1) { 293 int CurChar = getNextChar(); 294 295 if (CurChar == EOF) { 296 Error("end of file in global variable name"); 297 return lltok::Error; 298 } 299 if (CurChar == '"') { 300 StrVal.assign(TokStart+2, CurPtr-1); 301 UnEscapeLexed(StrVal); 302 return lltok::GlobalVar; 303 } 304 } 305 } 306 307 // Handle GlobalVarName: @[-a-zA-Z$._][-a-zA-Z$._0-9]* 308 if (isalpha(CurPtr[0]) || CurPtr[0] == '-' || CurPtr[0] == '$' || 309 CurPtr[0] == '.' || CurPtr[0] == '_') { 310 ++CurPtr; 311 while (isalnum(CurPtr[0]) || CurPtr[0] == '-' || CurPtr[0] == '$' || 312 CurPtr[0] == '.' || CurPtr[0] == '_') 313 ++CurPtr; 314 315 StrVal.assign(TokStart+1, CurPtr); // Skip @ 316 return lltok::GlobalVar; 317 } 318 319 // Handle GlobalVarID: @[0-9]+ 320 if (isdigit(CurPtr[0])) { 321 for (++CurPtr; isdigit(CurPtr[0]); ++CurPtr) 322 /*empty*/; 323 324 uint64_t Val = atoull(TokStart+1, CurPtr); 325 if ((unsigned)Val != Val) 326 Error("invalid value number (too large)!"); 327 UIntVal = unsigned(Val); 328 return lltok::GlobalID; 329 } 330 331 return lltok::Error; 332} 333 334 335/// LexPercent - Lex all tokens that start with a % character: 336/// LocalVar ::= %\"[^\"]*\" 337/// LocalVar ::= %[-a-zA-Z$._][-a-zA-Z$._0-9]* 338/// LocalVarID ::= %[0-9]+ 339lltok::Kind LLLexer::LexPercent() { 340 // Handle LocalVarName: %\"[^\"]*\" 341 if (CurPtr[0] == '"') { 342 ++CurPtr; 343 344 while (1) { 345 int CurChar = getNextChar(); 346 347 if (CurChar == EOF) { 348 Error("end of file in string constant"); 349 return lltok::Error; 350 } 351 if (CurChar == '"') { 352 StrVal.assign(TokStart+2, CurPtr-1); 353 UnEscapeLexed(StrVal); 354 return lltok::LocalVar; 355 } 356 } 357 } 358 359 // Handle LocalVarName: %[-a-zA-Z$._][-a-zA-Z$._0-9]* 360 if (isalpha(CurPtr[0]) || CurPtr[0] == '-' || CurPtr[0] == '$' || 361 CurPtr[0] == '.' || CurPtr[0] == '_') { 362 ++CurPtr; 363 while (isalnum(CurPtr[0]) || CurPtr[0] == '-' || CurPtr[0] == '$' || 364 CurPtr[0] == '.' || CurPtr[0] == '_') 365 ++CurPtr; 366 367 StrVal.assign(TokStart+1, CurPtr); // Skip % 368 return lltok::LocalVar; 369 } 370 371 // Handle LocalVarID: %[0-9]+ 372 if (isdigit(CurPtr[0])) { 373 for (++CurPtr; isdigit(CurPtr[0]); ++CurPtr) 374 /*empty*/; 375 376 uint64_t Val = atoull(TokStart+1, CurPtr); 377 if ((unsigned)Val != Val) 378 Error("invalid value number (too large)!"); 379 UIntVal = unsigned(Val); 380 return lltok::LocalVarID; 381 } 382 383 return lltok::Error; 384} 385 386/// LexQuote - Lex all tokens that start with a " character: 387/// QuoteLabel "[^"]+": 388/// StringConstant "[^"]*" 389lltok::Kind LLLexer::LexQuote() { 390 while (1) { 391 int CurChar = getNextChar(); 392 393 if (CurChar == EOF) { 394 Error("end of file in quoted string"); 395 return lltok::Error; 396 } 397 398 if (CurChar != '"') continue; 399 400 if (CurPtr[0] != ':') { 401 StrVal.assign(TokStart+1, CurPtr-1); 402 UnEscapeLexed(StrVal); 403 return lltok::StringConstant; 404 } 405 406 ++CurPtr; 407 StrVal.assign(TokStart+1, CurPtr-2); 408 UnEscapeLexed(StrVal); 409 return lltok::LabelStr; 410 } 411} 412 413static bool JustWhitespaceNewLine(const char *&Ptr) { 414 const char *ThisPtr = Ptr; 415 while (*ThisPtr == ' ' || *ThisPtr == '\t') 416 ++ThisPtr; 417 if (*ThisPtr == '\n' || *ThisPtr == '\r') { 418 Ptr = ThisPtr; 419 return true; 420 } 421 return false; 422} 423 424 425/// LexIdentifier: Handle several related productions: 426/// Label [-a-zA-Z$._0-9]+: 427/// IntegerType i[0-9]+ 428/// Keyword sdiv, float, ... 429/// HexIntConstant [us]0x[0-9A-Fa-f]+ 430lltok::Kind LLLexer::LexIdentifier() { 431 const char *StartChar = CurPtr; 432 const char *IntEnd = CurPtr[-1] == 'i' ? 0 : StartChar; 433 const char *KeywordEnd = 0; 434 435 for (; isLabelChar(*CurPtr); ++CurPtr) { 436 // If we decide this is an integer, remember the end of the sequence. 437 if (!IntEnd && !isdigit(*CurPtr)) IntEnd = CurPtr; 438 if (!KeywordEnd && !isalnum(*CurPtr) && *CurPtr != '_') KeywordEnd = CurPtr; 439 } 440 441 // If we stopped due to a colon, this really is a label. 442 if (*CurPtr == ':') { 443 StrVal.assign(StartChar-1, CurPtr++); 444 return lltok::LabelStr; 445 } 446 447 // Otherwise, this wasn't a label. If this was valid as an integer type, 448 // return it. 449 if (IntEnd == 0) IntEnd = CurPtr; 450 if (IntEnd != StartChar) { 451 CurPtr = IntEnd; 452 uint64_t NumBits = atoull(StartChar, CurPtr); 453 if (NumBits < IntegerType::MIN_INT_BITS || 454 NumBits > IntegerType::MAX_INT_BITS) { 455 Error("bitwidth for integer type out of range!"); 456 return lltok::Error; 457 } 458 TyVal = Context.getIntegerType(NumBits); 459 return lltok::Type; 460 } 461 462 // Otherwise, this was a letter sequence. See which keyword this is. 463 if (KeywordEnd == 0) KeywordEnd = CurPtr; 464 CurPtr = KeywordEnd; 465 --StartChar; 466 unsigned Len = CurPtr-StartChar; 467#define KEYWORD(STR) \ 468 if (Len == strlen(#STR) && !memcmp(StartChar, #STR, strlen(#STR))) \ 469 return lltok::kw_##STR; 470 471 KEYWORD(begin); KEYWORD(end); 472 KEYWORD(true); KEYWORD(false); 473 KEYWORD(declare); KEYWORD(define); 474 KEYWORD(global); KEYWORD(constant); 475 476 KEYWORD(private); 477 KEYWORD(linker_private); 478 KEYWORD(internal); 479 KEYWORD(available_externally); 480 KEYWORD(linkonce); 481 KEYWORD(linkonce_odr); 482 KEYWORD(weak); 483 KEYWORD(weak_odr); 484 KEYWORD(appending); 485 KEYWORD(dllimport); 486 KEYWORD(dllexport); 487 KEYWORD(common); 488 KEYWORD(default); 489 KEYWORD(hidden); 490 KEYWORD(protected); 491 KEYWORD(extern_weak); 492 KEYWORD(external); 493 KEYWORD(thread_local); 494 KEYWORD(zeroinitializer); 495 KEYWORD(undef); 496 KEYWORD(null); 497 KEYWORD(to); 498 KEYWORD(tail); 499 KEYWORD(target); 500 KEYWORD(triple); 501 KEYWORD(deplibs); 502 KEYWORD(datalayout); 503 KEYWORD(volatile); 504 KEYWORD(signed); 505 KEYWORD(unsigned); 506 KEYWORD(exact); 507 KEYWORD(align); 508 KEYWORD(addrspace); 509 KEYWORD(section); 510 KEYWORD(alias); 511 KEYWORD(module); 512 KEYWORD(asm); 513 KEYWORD(sideeffect); 514 KEYWORD(gc); 515 516 KEYWORD(ccc); 517 KEYWORD(fastcc); 518 KEYWORD(coldcc); 519 KEYWORD(x86_stdcallcc); 520 KEYWORD(x86_fastcallcc); 521 KEYWORD(arm_apcscc); 522 KEYWORD(arm_aapcscc); 523 KEYWORD(arm_aapcs_vfpcc); 524 525 KEYWORD(cc); 526 KEYWORD(c); 527 528 KEYWORD(signext); 529 KEYWORD(zeroext); 530 KEYWORD(inreg); 531 KEYWORD(sret); 532 KEYWORD(nounwind); 533 KEYWORD(noreturn); 534 KEYWORD(noalias); 535 KEYWORD(nocapture); 536 KEYWORD(byval); 537 KEYWORD(nest); 538 KEYWORD(readnone); 539 KEYWORD(readonly); 540 541 KEYWORD(noinline); 542 KEYWORD(alwaysinline); 543 KEYWORD(optsize); 544 KEYWORD(ssp); 545 KEYWORD(sspreq); 546 KEYWORD(noredzone); 547 KEYWORD(noimplicitfloat); 548 KEYWORD(naked); 549 550 KEYWORD(type); 551 KEYWORD(opaque); 552 553 KEYWORD(eq); KEYWORD(ne); KEYWORD(slt); KEYWORD(sgt); KEYWORD(sle); 554 KEYWORD(sge); KEYWORD(ult); KEYWORD(ugt); KEYWORD(ule); KEYWORD(uge); 555 KEYWORD(oeq); KEYWORD(one); KEYWORD(olt); KEYWORD(ogt); KEYWORD(ole); 556 KEYWORD(oge); KEYWORD(ord); KEYWORD(uno); KEYWORD(ueq); KEYWORD(une); 557 558 KEYWORD(x); 559#undef KEYWORD 560 561 // Keywords for types. 562#define TYPEKEYWORD(STR, LLVMTY) \ 563 if (Len == strlen(STR) && !memcmp(StartChar, STR, strlen(STR))) { \ 564 TyVal = LLVMTY; return lltok::Type; } 565 TYPEKEYWORD("void", Type::VoidTy); 566 TYPEKEYWORD("float", Type::FloatTy); 567 TYPEKEYWORD("double", Type::DoubleTy); 568 TYPEKEYWORD("x86_fp80", Type::X86_FP80Ty); 569 TYPEKEYWORD("fp128", Type::FP128Ty); 570 TYPEKEYWORD("ppc_fp128", Type::PPC_FP128Ty); 571 TYPEKEYWORD("label", Type::LabelTy); 572 TYPEKEYWORD("metadata", Type::MetadataTy); 573#undef TYPEKEYWORD 574 575 // Handle special forms for autoupgrading. Drop these in LLVM 3.0. This is 576 // to avoid conflicting with the sext/zext instructions, below. 577 if (Len == 4 && !memcmp(StartChar, "sext", 4)) { 578 // Scan CurPtr ahead, seeing if there is just whitespace before the newline. 579 if (JustWhitespaceNewLine(CurPtr)) 580 return lltok::kw_signext; 581 } else if (Len == 4 && !memcmp(StartChar, "zext", 4)) { 582 // Scan CurPtr ahead, seeing if there is just whitespace before the newline. 583 if (JustWhitespaceNewLine(CurPtr)) 584 return lltok::kw_zeroext; 585 } 586 587 // Keywords for instructions. 588#define INSTKEYWORD(STR, Enum) \ 589 if (Len == strlen(#STR) && !memcmp(StartChar, #STR, strlen(#STR))) { \ 590 UIntVal = Instruction::Enum; return lltok::kw_##STR; } 591 592 INSTKEYWORD(add, Add); INSTKEYWORD(fadd, FAdd); 593 INSTKEYWORD(sub, Sub); INSTKEYWORD(fsub, FSub); 594 INSTKEYWORD(mul, Mul); INSTKEYWORD(fmul, FMul); 595 INSTKEYWORD(udiv, UDiv); INSTKEYWORD(sdiv, SDiv); INSTKEYWORD(fdiv, FDiv); 596 INSTKEYWORD(urem, URem); INSTKEYWORD(srem, SRem); INSTKEYWORD(frem, FRem); 597 INSTKEYWORD(shl, Shl); INSTKEYWORD(lshr, LShr); INSTKEYWORD(ashr, AShr); 598 INSTKEYWORD(and, And); INSTKEYWORD(or, Or); INSTKEYWORD(xor, Xor); 599 INSTKEYWORD(icmp, ICmp); INSTKEYWORD(fcmp, FCmp); 600 601 INSTKEYWORD(phi, PHI); 602 INSTKEYWORD(call, Call); 603 INSTKEYWORD(trunc, Trunc); 604 INSTKEYWORD(zext, ZExt); 605 INSTKEYWORD(sext, SExt); 606 INSTKEYWORD(fptrunc, FPTrunc); 607 INSTKEYWORD(fpext, FPExt); 608 INSTKEYWORD(uitofp, UIToFP); 609 INSTKEYWORD(sitofp, SIToFP); 610 INSTKEYWORD(fptoui, FPToUI); 611 INSTKEYWORD(fptosi, FPToSI); 612 INSTKEYWORD(inttoptr, IntToPtr); 613 INSTKEYWORD(ptrtoint, PtrToInt); 614 INSTKEYWORD(bitcast, BitCast); 615 INSTKEYWORD(select, Select); 616 INSTKEYWORD(va_arg, VAArg); 617 INSTKEYWORD(ret, Ret); 618 INSTKEYWORD(br, Br); 619 INSTKEYWORD(switch, Switch); 620 INSTKEYWORD(invoke, Invoke); 621 INSTKEYWORD(unwind, Unwind); 622 INSTKEYWORD(unreachable, Unreachable); 623 624 INSTKEYWORD(malloc, Malloc); 625 INSTKEYWORD(alloca, Alloca); 626 INSTKEYWORD(free, Free); 627 INSTKEYWORD(load, Load); 628 INSTKEYWORD(store, Store); 629 INSTKEYWORD(getelementptr, GetElementPtr); 630 631 INSTKEYWORD(extractelement, ExtractElement); 632 INSTKEYWORD(insertelement, InsertElement); 633 INSTKEYWORD(shufflevector, ShuffleVector); 634 INSTKEYWORD(getresult, ExtractValue); 635 INSTKEYWORD(extractvalue, ExtractValue); 636 INSTKEYWORD(insertvalue, InsertValue); 637#undef INSTKEYWORD 638 639 // Check for [us]0x[0-9A-Fa-f]+ which are Hexadecimal constant generated by 640 // the CFE to avoid forcing it to deal with 64-bit numbers. 641 if ((TokStart[0] == 'u' || TokStart[0] == 's') && 642 TokStart[1] == '0' && TokStart[2] == 'x' && isxdigit(TokStart[3])) { 643 int len = CurPtr-TokStart-3; 644 uint32_t bits = len * 4; 645 APInt Tmp(bits, TokStart+3, len, 16); 646 uint32_t activeBits = Tmp.getActiveBits(); 647 if (activeBits > 0 && activeBits < bits) 648 Tmp.trunc(activeBits); 649 APSIntVal = APSInt(Tmp, TokStart[0] == 'u'); 650 return lltok::APSInt; 651 } 652 653 // If this is "cc1234", return this as just "cc". 654 if (TokStart[0] == 'c' && TokStart[1] == 'c') { 655 CurPtr = TokStart+2; 656 return lltok::kw_cc; 657 } 658 659 // If this starts with "call", return it as CALL. This is to support old 660 // broken .ll files. FIXME: remove this with LLVM 3.0. 661 if (CurPtr-TokStart > 4 && !memcmp(TokStart, "call", 4)) { 662 CurPtr = TokStart+4; 663 UIntVal = Instruction::Call; 664 return lltok::kw_call; 665 } 666 667 // Finally, if this isn't known, return an error. 668 CurPtr = TokStart+1; 669 return lltok::Error; 670} 671 672 673/// Lex0x: Handle productions that start with 0x, knowing that it matches and 674/// that this is not a label: 675/// HexFPConstant 0x[0-9A-Fa-f]+ 676/// HexFP80Constant 0xK[0-9A-Fa-f]+ 677/// HexFP128Constant 0xL[0-9A-Fa-f]+ 678/// HexPPC128Constant 0xM[0-9A-Fa-f]+ 679lltok::Kind LLLexer::Lex0x() { 680 CurPtr = TokStart + 2; 681 682 char Kind; 683 if (CurPtr[0] >= 'K' && CurPtr[0] <= 'M') { 684 Kind = *CurPtr++; 685 } else { 686 Kind = 'J'; 687 } 688 689 if (!isxdigit(CurPtr[0])) { 690 // Bad token, return it as an error. 691 CurPtr = TokStart+1; 692 return lltok::Error; 693 } 694 695 while (isxdigit(CurPtr[0])) 696 ++CurPtr; 697 698 if (Kind == 'J') { 699 // HexFPConstant - Floating point constant represented in IEEE format as a 700 // hexadecimal number for when exponential notation is not precise enough. 701 // Float and double only. 702 APFloatVal = APFloat(BitsToDouble(HexIntToVal(TokStart+2, CurPtr))); 703 return lltok::APFloat; 704 } 705 706 uint64_t Pair[2]; 707 switch (Kind) { 708 default: llvm_unreachable("Unknown kind!"); 709 case 'K': 710 // F80HexFPConstant - x87 long double in hexadecimal format (10 bytes) 711 FP80HexToIntPair(TokStart+3, CurPtr, Pair); 712 APFloatVal = APFloat(APInt(80, 2, Pair)); 713 return lltok::APFloat; 714 case 'L': 715 // F128HexFPConstant - IEEE 128-bit in hexadecimal format (16 bytes) 716 HexToIntPair(TokStart+3, CurPtr, Pair); 717 APFloatVal = APFloat(APInt(128, 2, Pair), true); 718 return lltok::APFloat; 719 case 'M': 720 // PPC128HexFPConstant - PowerPC 128-bit in hexadecimal format (16 bytes) 721 HexToIntPair(TokStart+3, CurPtr, Pair); 722 APFloatVal = APFloat(APInt(128, 2, Pair)); 723 return lltok::APFloat; 724 } 725} 726 727/// LexIdentifier: Handle several related productions: 728/// Label [-a-zA-Z$._0-9]+: 729/// NInteger -[0-9]+ 730/// FPConstant [-+]?[0-9]+[.][0-9]*([eE][-+]?[0-9]+)? 731/// PInteger [0-9]+ 732/// HexFPConstant 0x[0-9A-Fa-f]+ 733/// HexFP80Constant 0xK[0-9A-Fa-f]+ 734/// HexFP128Constant 0xL[0-9A-Fa-f]+ 735/// HexPPC128Constant 0xM[0-9A-Fa-f]+ 736lltok::Kind LLLexer::LexDigitOrNegative() { 737 // If the letter after the negative is a number, this is probably a label. 738 if (!isdigit(TokStart[0]) && !isdigit(CurPtr[0])) { 739 // Okay, this is not a number after the -, it's probably a label. 740 if (const char *End = isLabelTail(CurPtr)) { 741 StrVal.assign(TokStart, End-1); 742 CurPtr = End; 743 return lltok::LabelStr; 744 } 745 746 return lltok::Error; 747 } 748 749 // At this point, it is either a label, int or fp constant. 750 751 // Skip digits, we have at least one. 752 for (; isdigit(CurPtr[0]); ++CurPtr) 753 /*empty*/; 754 755 // Check to see if this really is a label afterall, e.g. "-1:". 756 if (isLabelChar(CurPtr[0]) || CurPtr[0] == ':') { 757 if (const char *End = isLabelTail(CurPtr)) { 758 StrVal.assign(TokStart, End-1); 759 CurPtr = End; 760 return lltok::LabelStr; 761 } 762 } 763 764 // If the next character is a '.', then it is a fp value, otherwise its 765 // integer. 766 if (CurPtr[0] != '.') { 767 if (TokStart[0] == '0' && TokStart[1] == 'x') 768 return Lex0x(); 769 unsigned Len = CurPtr-TokStart; 770 uint32_t numBits = ((Len * 64) / 19) + 2; 771 APInt Tmp(numBits, TokStart, Len, 10); 772 if (TokStart[0] == '-') { 773 uint32_t minBits = Tmp.getMinSignedBits(); 774 if (minBits > 0 && minBits < numBits) 775 Tmp.trunc(minBits); 776 APSIntVal = APSInt(Tmp, false); 777 } else { 778 uint32_t activeBits = Tmp.getActiveBits(); 779 if (activeBits > 0 && activeBits < numBits) 780 Tmp.trunc(activeBits); 781 APSIntVal = APSInt(Tmp, true); 782 } 783 return lltok::APSInt; 784 } 785 786 ++CurPtr; 787 788 // Skip over [0-9]*([eE][-+]?[0-9]+)? 789 while (isdigit(CurPtr[0])) ++CurPtr; 790 791 if (CurPtr[0] == 'e' || CurPtr[0] == 'E') { 792 if (isdigit(CurPtr[1]) || 793 ((CurPtr[1] == '-' || CurPtr[1] == '+') && isdigit(CurPtr[2]))) { 794 CurPtr += 2; 795 while (isdigit(CurPtr[0])) ++CurPtr; 796 } 797 } 798 799 APFloatVal = APFloat(atof(TokStart)); 800 return lltok::APFloat; 801} 802 803/// FPConstant [-+]?[0-9]+[.][0-9]*([eE][-+]?[0-9]+)? 804lltok::Kind LLLexer::LexPositive() { 805 // If the letter after the negative is a number, this is probably not a 806 // label. 807 if (!isdigit(CurPtr[0])) 808 return lltok::Error; 809 810 // Skip digits. 811 for (++CurPtr; isdigit(CurPtr[0]); ++CurPtr) 812 /*empty*/; 813 814 // At this point, we need a '.'. 815 if (CurPtr[0] != '.') { 816 CurPtr = TokStart+1; 817 return lltok::Error; 818 } 819 820 ++CurPtr; 821 822 // Skip over [0-9]*([eE][-+]?[0-9]+)? 823 while (isdigit(CurPtr[0])) ++CurPtr; 824 825 if (CurPtr[0] == 'e' || CurPtr[0] == 'E') { 826 if (isdigit(CurPtr[1]) || 827 ((CurPtr[1] == '-' || CurPtr[1] == '+') && isdigit(CurPtr[2]))) { 828 CurPtr += 2; 829 while (isdigit(CurPtr[0])) ++CurPtr; 830 } 831 } 832 833 APFloatVal = APFloat(atof(TokStart)); 834 return lltok::APFloat; 835} 836