LLLexer.cpp revision cf4d2f11a1acc12a0f6b50991907e4a998ee9cdd
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 <cstdio> 25#include <cstdlib> 26#include <cstring> 27using namespace llvm; 28 29bool LLLexer::Error(LocTy ErrorLoc, const std::string &Msg) const { 30 ErrorInfo = SM.GetMessage(ErrorLoc, Msg, "error"); 31 return true; 32} 33 34//===----------------------------------------------------------------------===// 35// Helper functions. 36//===----------------------------------------------------------------------===// 37 38// atoull - Convert an ascii string of decimal digits into the unsigned long 39// long representation... this does not have to do input error checking, 40// because we know that the input will be matched by a suitable regex... 41// 42uint64_t LLLexer::atoull(const char *Buffer, const char *End) { 43 uint64_t Result = 0; 44 for (; Buffer != End; Buffer++) { 45 uint64_t OldRes = Result; 46 Result *= 10; 47 Result += *Buffer-'0'; 48 if (Result < OldRes) { // Uh, oh, overflow detected!!! 49 Error("constant bigger than 64 bits detected!"); 50 return 0; 51 } 52 } 53 return Result; 54} 55 56uint64_t LLLexer::HexIntToVal(const char *Buffer, const char *End) { 57 uint64_t Result = 0; 58 for (; Buffer != End; ++Buffer) { 59 uint64_t OldRes = Result; 60 Result *= 16; 61 char C = *Buffer; 62 if (C >= '0' && C <= '9') 63 Result += C-'0'; 64 else if (C >= 'A' && C <= 'F') 65 Result += C-'A'+10; 66 else if (C >= 'a' && C <= 'f') 67 Result += C-'a'+10; 68 69 if (Result < OldRes) { // Uh, oh, overflow detected!!! 70 Error("constant bigger than 64 bits detected!"); 71 return 0; 72 } 73 } 74 return Result; 75} 76 77void LLLexer::HexToIntPair(const char *Buffer, const char *End, 78 uint64_t Pair[2]) { 79 Pair[0] = 0; 80 for (int i=0; i<16; i++, Buffer++) { 81 assert(Buffer != End); 82 Pair[0] *= 16; 83 char C = *Buffer; 84 if (C >= '0' && C <= '9') 85 Pair[0] += C-'0'; 86 else if (C >= 'A' && C <= 'F') 87 Pair[0] += C-'A'+10; 88 else if (C >= 'a' && C <= 'f') 89 Pair[0] += C-'a'+10; 90 } 91 Pair[1] = 0; 92 for (int i=0; i<16 && Buffer != End; i++, Buffer++) { 93 Pair[1] *= 16; 94 char C = *Buffer; 95 if (C >= '0' && C <= '9') 96 Pair[1] += C-'0'; 97 else if (C >= 'A' && C <= 'F') 98 Pair[1] += C-'A'+10; 99 else if (C >= 'a' && C <= 'f') 100 Pair[1] += C-'a'+10; 101 } 102 if (Buffer != End) 103 Error("constant bigger than 128 bits detected!"); 104} 105 106/// FP80HexToIntPair - translate an 80 bit FP80 number (20 hexits) into 107/// { low64, high16 } as usual for an APInt. 108void LLLexer::FP80HexToIntPair(const char *Buffer, const char *End, 109 uint64_t Pair[2]) { 110 Pair[1] = 0; 111 for (int i=0; i<4 && Buffer != End; i++, Buffer++) { 112 assert(Buffer != End); 113 Pair[1] *= 16; 114 char C = *Buffer; 115 if (C >= '0' && C <= '9') 116 Pair[1] += C-'0'; 117 else if (C >= 'A' && C <= 'F') 118 Pair[1] += C-'A'+10; 119 else if (C >= 'a' && C <= 'f') 120 Pair[1] += C-'a'+10; 121 } 122 Pair[0] = 0; 123 for (int i=0; i<16; i++, Buffer++) { 124 Pair[0] *= 16; 125 char C = *Buffer; 126 if (C >= '0' && C <= '9') 127 Pair[0] += C-'0'; 128 else if (C >= 'A' && C <= 'F') 129 Pair[0] += C-'A'+10; 130 else if (C >= 'a' && C <= 'f') 131 Pair[0] += C-'a'+10; 132 } 133 if (Buffer != End) 134 Error("constant bigger than 128 bits detected!"); 135} 136 137// UnEscapeLexed - Run through the specified buffer and change \xx codes to the 138// appropriate character. 139static void UnEscapeLexed(std::string &Str) { 140 if (Str.empty()) return; 141 142 char *Buffer = &Str[0], *EndBuffer = Buffer+Str.size(); 143 char *BOut = Buffer; 144 for (char *BIn = Buffer; BIn != EndBuffer; ) { 145 if (BIn[0] == '\\') { 146 if (BIn < EndBuffer-1 && BIn[1] == '\\') { 147 *BOut++ = '\\'; // Two \ becomes one 148 BIn += 2; 149 } else if (BIn < EndBuffer-2 && isxdigit(BIn[1]) && isxdigit(BIn[2])) { 150 char Tmp = BIn[3]; BIn[3] = 0; // Terminate string 151 *BOut = (char)strtol(BIn+1, 0, 16); // Convert to number 152 BIn[3] = Tmp; // Restore character 153 BIn += 3; // Skip over handled chars 154 ++BOut; 155 } else { 156 *BOut++ = *BIn++; 157 } 158 } else { 159 *BOut++ = *BIn++; 160 } 161 } 162 Str.resize(BOut-Buffer); 163} 164 165/// isLabelChar - Return true for [-a-zA-Z$._0-9]. 166static bool isLabelChar(char C) { 167 return isalnum(C) || C == '-' || C == '$' || C == '.' || C == '_'; 168} 169 170 171/// isLabelTail - Return true if this pointer points to a valid end of a label. 172static const char *isLabelTail(const char *CurPtr) { 173 while (1) { 174 if (CurPtr[0] == ':') return CurPtr+1; 175 if (!isLabelChar(CurPtr[0])) return 0; 176 ++CurPtr; 177 } 178} 179 180 181 182//===----------------------------------------------------------------------===// 183// Lexer definition. 184//===----------------------------------------------------------------------===// 185 186LLLexer::LLLexer(MemoryBuffer *StartBuf, SourceMgr &sm, SMDiagnostic &Err, 187 LLVMContext &C) 188 : CurBuf(StartBuf), ErrorInfo(Err), SM(sm), Context(C), APFloatVal(0.0) { 189 CurPtr = CurBuf->getBufferStart(); 190} 191 192std::string LLLexer::getFilename() const { 193 return CurBuf->getBufferIdentifier(); 194} 195 196int LLLexer::getNextChar() { 197 char CurChar = *CurPtr++; 198 switch (CurChar) { 199 default: return (unsigned char)CurChar; 200 case 0: 201 // A nul character in the stream is either the end of the current buffer or 202 // a random nul in the file. Disambiguate that here. 203 if (CurPtr-1 != CurBuf->getBufferEnd()) 204 return 0; // Just whitespace. 205 206 // Otherwise, return end of file. 207 --CurPtr; // Another call to lex will return EOF again. 208 return EOF; 209 } 210} 211 212 213lltok::Kind LLLexer::LexToken() { 214 TokStart = CurPtr; 215 216 int CurChar = getNextChar(); 217 switch (CurChar) { 218 default: 219 // Handle letters: [a-zA-Z_] 220 if (isalpha(CurChar) || CurChar == '_') 221 return LexIdentifier(); 222 223 return lltok::Error; 224 case EOF: return lltok::Eof; 225 case 0: 226 case ' ': 227 case '\t': 228 case '\n': 229 case '\r': 230 // Ignore whitespace. 231 return LexToken(); 232 case '+': return LexPositive(); 233 case '@': return LexAt(); 234 case '%': return LexPercent(); 235 case '"': return LexQuote(); 236 case '.': 237 if (const char *Ptr = isLabelTail(CurPtr)) { 238 CurPtr = Ptr; 239 StrVal.assign(TokStart, CurPtr-1); 240 return lltok::LabelStr; 241 } 242 if (CurPtr[0] == '.' && CurPtr[1] == '.') { 243 CurPtr += 2; 244 return lltok::dotdotdot; 245 } 246 return lltok::Error; 247 case '$': 248 if (const char *Ptr = isLabelTail(CurPtr)) { 249 CurPtr = Ptr; 250 StrVal.assign(TokStart, CurPtr-1); 251 return lltok::LabelStr; 252 } 253 return lltok::Error; 254 case ';': 255 SkipLineComment(); 256 return LexToken(); 257 case '!': return LexMetadata(); 258 case '0': case '1': case '2': case '3': case '4': 259 case '5': case '6': case '7': case '8': case '9': 260 case '-': 261 return LexDigitOrNegative(); 262 case '=': return lltok::equal; 263 case '[': return lltok::lsquare; 264 case ']': return lltok::rsquare; 265 case '{': return lltok::lbrace; 266 case '}': return lltok::rbrace; 267 case '<': return lltok::less; 268 case '>': return lltok::greater; 269 case '(': return lltok::lparen; 270 case ')': return lltok::rparen; 271 case ',': return lltok::comma; 272 case '*': return lltok::star; 273 case '\\': return lltok::backslash; 274 } 275} 276 277void LLLexer::SkipLineComment() { 278 while (1) { 279 if (CurPtr[0] == '\n' || CurPtr[0] == '\r' || getNextChar() == EOF) 280 return; 281 } 282} 283 284/// LexAt - Lex all tokens that start with an @ character: 285/// GlobalVar @\"[^\"]*\" 286/// GlobalVar @[-a-zA-Z$._][-a-zA-Z$._0-9]* 287/// GlobalVarID @[0-9]+ 288lltok::Kind LLLexer::LexAt() { 289 // Handle AtStringConstant: @\"[^\"]*\" 290 if (CurPtr[0] == '"') { 291 ++CurPtr; 292 293 while (1) { 294 int CurChar = getNextChar(); 295 296 if (CurChar == EOF) { 297 Error("end of file in global variable name"); 298 return lltok::Error; 299 } 300 if (CurChar == '"') { 301 StrVal.assign(TokStart+2, CurPtr-1); 302 UnEscapeLexed(StrVal); 303 return lltok::GlobalVar; 304 } 305 } 306 } 307 308 // Handle GlobalVarName: @[-a-zA-Z$._][-a-zA-Z$._0-9]* 309 if (isalpha(CurPtr[0]) || CurPtr[0] == '-' || CurPtr[0] == '$' || 310 CurPtr[0] == '.' || CurPtr[0] == '_') { 311 ++CurPtr; 312 while (isalnum(CurPtr[0]) || CurPtr[0] == '-' || CurPtr[0] == '$' || 313 CurPtr[0] == '.' || CurPtr[0] == '_') 314 ++CurPtr; 315 316 StrVal.assign(TokStart+1, CurPtr); // Skip @ 317 return lltok::GlobalVar; 318 } 319 320 // Handle GlobalVarID: @[0-9]+ 321 if (isdigit(CurPtr[0])) { 322 for (++CurPtr; isdigit(CurPtr[0]); ++CurPtr) 323 /*empty*/; 324 325 uint64_t Val = atoull(TokStart+1, CurPtr); 326 if ((unsigned)Val != Val) 327 Error("invalid value number (too large)!"); 328 UIntVal = unsigned(Val); 329 return lltok::GlobalID; 330 } 331 332 return lltok::Error; 333} 334 335 336/// LexPercent - Lex all tokens that start with a % character: 337/// LocalVar ::= %\"[^\"]*\" 338/// LocalVar ::= %[-a-zA-Z$._][-a-zA-Z$._0-9]* 339/// LocalVarID ::= %[0-9]+ 340lltok::Kind LLLexer::LexPercent() { 341 // Handle LocalVarName: %\"[^\"]*\" 342 if (CurPtr[0] == '"') { 343 ++CurPtr; 344 345 while (1) { 346 int CurChar = getNextChar(); 347 348 if (CurChar == EOF) { 349 Error("end of file in string constant"); 350 return lltok::Error; 351 } 352 if (CurChar == '"') { 353 StrVal.assign(TokStart+2, CurPtr-1); 354 UnEscapeLexed(StrVal); 355 return lltok::LocalVar; 356 } 357 } 358 } 359 360 // Handle LocalVarName: %[-a-zA-Z$._][-a-zA-Z$._0-9]* 361 if (isalpha(CurPtr[0]) || CurPtr[0] == '-' || CurPtr[0] == '$' || 362 CurPtr[0] == '.' || CurPtr[0] == '_') { 363 ++CurPtr; 364 while (isalnum(CurPtr[0]) || CurPtr[0] == '-' || CurPtr[0] == '$' || 365 CurPtr[0] == '.' || CurPtr[0] == '_') 366 ++CurPtr; 367 368 StrVal.assign(TokStart+1, CurPtr); // Skip % 369 return lltok::LocalVar; 370 } 371 372 // Handle LocalVarID: %[0-9]+ 373 if (isdigit(CurPtr[0])) { 374 for (++CurPtr; isdigit(CurPtr[0]); ++CurPtr) 375 /*empty*/; 376 377 uint64_t Val = atoull(TokStart+1, CurPtr); 378 if ((unsigned)Val != Val) 379 Error("invalid value number (too large)!"); 380 UIntVal = unsigned(Val); 381 return lltok::LocalVarID; 382 } 383 384 return lltok::Error; 385} 386 387/// LexQuote - Lex all tokens that start with a " character: 388/// QuoteLabel "[^"]+": 389/// StringConstant "[^"]*" 390lltok::Kind LLLexer::LexQuote() { 391 while (1) { 392 int CurChar = getNextChar(); 393 394 if (CurChar == EOF) { 395 Error("end of file in quoted string"); 396 return lltok::Error; 397 } 398 399 if (CurChar != '"') continue; 400 401 if (CurPtr[0] != ':') { 402 StrVal.assign(TokStart+1, CurPtr-1); 403 UnEscapeLexed(StrVal); 404 return lltok::StringConstant; 405 } 406 407 ++CurPtr; 408 StrVal.assign(TokStart+1, CurPtr-2); 409 UnEscapeLexed(StrVal); 410 return lltok::LabelStr; 411 } 412} 413 414static bool JustWhitespaceNewLine(const char *&Ptr) { 415 const char *ThisPtr = Ptr; 416 while (*ThisPtr == ' ' || *ThisPtr == '\t') 417 ++ThisPtr; 418 if (*ThisPtr == '\n' || *ThisPtr == '\r') { 419 Ptr = ThisPtr; 420 return true; 421 } 422 return false; 423} 424 425/// LexMetadata: 426/// !{...} 427/// !42 428/// !foo 429lltok::Kind LLLexer::LexMetadata() { 430 if (isalpha(CurPtr[0])) { 431 ++CurPtr; 432 while (isalnum(CurPtr[0]) || CurPtr[0] == '-' || CurPtr[0] == '$' || 433 CurPtr[0] == '.' || CurPtr[0] == '_') 434 ++CurPtr; 435 436 StrVal.assign(TokStart+1, CurPtr); // Skip ! 437 return lltok::NamedOrCustomMD; 438 } 439 return lltok::Metadata; 440} 441 442/// LexIdentifier: Handle several related productions: 443/// Label [-a-zA-Z$._0-9]+: 444/// IntegerType i[0-9]+ 445/// Keyword sdiv, float, ... 446/// HexIntConstant [us]0x[0-9A-Fa-f]+ 447lltok::Kind LLLexer::LexIdentifier() { 448 const char *StartChar = CurPtr; 449 const char *IntEnd = CurPtr[-1] == 'i' ? 0 : StartChar; 450 const char *KeywordEnd = 0; 451 452 for (; isLabelChar(*CurPtr); ++CurPtr) { 453 // If we decide this is an integer, remember the end of the sequence. 454 if (!IntEnd && !isdigit(*CurPtr)) IntEnd = CurPtr; 455 if (!KeywordEnd && !isalnum(*CurPtr) && *CurPtr != '_') KeywordEnd = CurPtr; 456 } 457 458 // If we stopped due to a colon, this really is a label. 459 if (*CurPtr == ':') { 460 StrVal.assign(StartChar-1, CurPtr++); 461 return lltok::LabelStr; 462 } 463 464 // Otherwise, this wasn't a label. If this was valid as an integer type, 465 // return it. 466 if (IntEnd == 0) IntEnd = CurPtr; 467 if (IntEnd != StartChar) { 468 CurPtr = IntEnd; 469 uint64_t NumBits = atoull(StartChar, CurPtr); 470 if (NumBits < IntegerType::MIN_INT_BITS || 471 NumBits > IntegerType::MAX_INT_BITS) { 472 Error("bitwidth for integer type out of range!"); 473 return lltok::Error; 474 } 475 TyVal = IntegerType::get(Context, NumBits); 476 return lltok::Type; 477 } 478 479 // Otherwise, this was a letter sequence. See which keyword this is. 480 if (KeywordEnd == 0) KeywordEnd = CurPtr; 481 CurPtr = KeywordEnd; 482 --StartChar; 483 unsigned Len = CurPtr-StartChar; 484#define KEYWORD(STR) \ 485 if (Len == strlen(#STR) && !memcmp(StartChar, #STR, strlen(#STR))) \ 486 return lltok::kw_##STR; 487 488 KEYWORD(begin); KEYWORD(end); 489 KEYWORD(true); KEYWORD(false); 490 KEYWORD(declare); KEYWORD(define); 491 KEYWORD(global); KEYWORD(constant); 492 493 KEYWORD(private); 494 KEYWORD(linker_private); 495 KEYWORD(internal); 496 KEYWORD(available_externally); 497 KEYWORD(linkonce); 498 KEYWORD(linkonce_odr); 499 KEYWORD(weak); 500 KEYWORD(weak_odr); 501 KEYWORD(appending); 502 KEYWORD(dllimport); 503 KEYWORD(dllexport); 504 KEYWORD(common); 505 KEYWORD(default); 506 KEYWORD(hidden); 507 KEYWORD(protected); 508 KEYWORD(extern_weak); 509 KEYWORD(external); 510 KEYWORD(thread_local); 511 KEYWORD(zeroinitializer); 512 KEYWORD(undef); 513 KEYWORD(null); 514 KEYWORD(to); 515 KEYWORD(tail); 516 KEYWORD(target); 517 KEYWORD(triple); 518 KEYWORD(deplibs); 519 KEYWORD(datalayout); 520 KEYWORD(volatile); 521 KEYWORD(nuw); 522 KEYWORD(nsw); 523 KEYWORD(exact); 524 KEYWORD(inbounds); 525 KEYWORD(align); 526 KEYWORD(addrspace); 527 KEYWORD(section); 528 KEYWORD(alias); 529 KEYWORD(module); 530 KEYWORD(asm); 531 KEYWORD(sideeffect); 532 KEYWORD(msasm); 533 KEYWORD(gc); 534 535 KEYWORD(ccc); 536 KEYWORD(fastcc); 537 KEYWORD(coldcc); 538 KEYWORD(x86_stdcallcc); 539 KEYWORD(x86_fastcallcc); 540 KEYWORD(arm_apcscc); 541 KEYWORD(arm_aapcscc); 542 KEYWORD(arm_aapcs_vfpcc); 543 544 KEYWORD(cc); 545 KEYWORD(c); 546 547 KEYWORD(signext); 548 KEYWORD(zeroext); 549 KEYWORD(inreg); 550 KEYWORD(sret); 551 KEYWORD(nounwind); 552 KEYWORD(noreturn); 553 KEYWORD(noalias); 554 KEYWORD(nocapture); 555 KEYWORD(byval); 556 KEYWORD(nest); 557 KEYWORD(readnone); 558 KEYWORD(readonly); 559 560 KEYWORD(inlinehint); 561 KEYWORD(noinline); 562 KEYWORD(alwaysinline); 563 KEYWORD(optsize); 564 KEYWORD(ssp); 565 KEYWORD(sspreq); 566 KEYWORD(noredzone); 567 KEYWORD(noimplicitfloat); 568 KEYWORD(naked); 569 570 KEYWORD(type); 571 KEYWORD(opaque); 572 573 KEYWORD(eq); KEYWORD(ne); KEYWORD(slt); KEYWORD(sgt); KEYWORD(sle); 574 KEYWORD(sge); KEYWORD(ult); KEYWORD(ugt); KEYWORD(ule); KEYWORD(uge); 575 KEYWORD(oeq); KEYWORD(one); KEYWORD(olt); KEYWORD(ogt); KEYWORD(ole); 576 KEYWORD(oge); KEYWORD(ord); KEYWORD(uno); KEYWORD(ueq); KEYWORD(une); 577 578 KEYWORD(x); 579#undef KEYWORD 580 581 // Keywords for types. 582#define TYPEKEYWORD(STR, LLVMTY) \ 583 if (Len == strlen(STR) && !memcmp(StartChar, STR, strlen(STR))) { \ 584 TyVal = LLVMTY; return lltok::Type; } 585 TYPEKEYWORD("void", Type::getVoidTy(Context)); 586 TYPEKEYWORD("float", Type::getFloatTy(Context)); 587 TYPEKEYWORD("double", Type::getDoubleTy(Context)); 588 TYPEKEYWORD("x86_fp80", Type::getX86_FP80Ty(Context)); 589 TYPEKEYWORD("fp128", Type::getFP128Ty(Context)); 590 TYPEKEYWORD("ppc_fp128", Type::getPPC_FP128Ty(Context)); 591 TYPEKEYWORD("label", Type::getLabelTy(Context)); 592 TYPEKEYWORD("metadata", Type::getMetadataTy(Context)); 593#undef TYPEKEYWORD 594 595 // Handle special forms for autoupgrading. Drop these in LLVM 3.0. This is 596 // to avoid conflicting with the sext/zext instructions, below. 597 if (Len == 4 && !memcmp(StartChar, "sext", 4)) { 598 // Scan CurPtr ahead, seeing if there is just whitespace before the newline. 599 if (JustWhitespaceNewLine(CurPtr)) 600 return lltok::kw_signext; 601 } else if (Len == 4 && !memcmp(StartChar, "zext", 4)) { 602 // Scan CurPtr ahead, seeing if there is just whitespace before the newline. 603 if (JustWhitespaceNewLine(CurPtr)) 604 return lltok::kw_zeroext; 605 } else if (Len == 6 && !memcmp(StartChar, "malloc", 6)) { 606 // FIXME: Remove in LLVM 3.0. 607 // Autoupgrade malloc instruction. 608 return lltok::kw_malloc; 609 } 610 611 // Keywords for instructions. 612#define INSTKEYWORD(STR, Enum) \ 613 if (Len == strlen(#STR) && !memcmp(StartChar, #STR, strlen(#STR))) { \ 614 UIntVal = Instruction::Enum; return lltok::kw_##STR; } 615 616 INSTKEYWORD(add, Add); INSTKEYWORD(fadd, FAdd); 617 INSTKEYWORD(sub, Sub); INSTKEYWORD(fsub, FSub); 618 INSTKEYWORD(mul, Mul); INSTKEYWORD(fmul, FMul); 619 INSTKEYWORD(udiv, UDiv); INSTKEYWORD(sdiv, SDiv); INSTKEYWORD(fdiv, FDiv); 620 INSTKEYWORD(urem, URem); INSTKEYWORD(srem, SRem); INSTKEYWORD(frem, FRem); 621 INSTKEYWORD(shl, Shl); INSTKEYWORD(lshr, LShr); INSTKEYWORD(ashr, AShr); 622 INSTKEYWORD(and, And); INSTKEYWORD(or, Or); INSTKEYWORD(xor, Xor); 623 INSTKEYWORD(icmp, ICmp); INSTKEYWORD(fcmp, FCmp); 624 625 INSTKEYWORD(phi, PHI); 626 INSTKEYWORD(call, Call); 627 INSTKEYWORD(trunc, Trunc); 628 INSTKEYWORD(zext, ZExt); 629 INSTKEYWORD(sext, SExt); 630 INSTKEYWORD(fptrunc, FPTrunc); 631 INSTKEYWORD(fpext, FPExt); 632 INSTKEYWORD(uitofp, UIToFP); 633 INSTKEYWORD(sitofp, SIToFP); 634 INSTKEYWORD(fptoui, FPToUI); 635 INSTKEYWORD(fptosi, FPToSI); 636 INSTKEYWORD(inttoptr, IntToPtr); 637 INSTKEYWORD(ptrtoint, PtrToInt); 638 INSTKEYWORD(bitcast, BitCast); 639 INSTKEYWORD(select, Select); 640 INSTKEYWORD(va_arg, VAArg); 641 INSTKEYWORD(ret, Ret); 642 INSTKEYWORD(br, Br); 643 INSTKEYWORD(switch, Switch); 644 INSTKEYWORD(invoke, Invoke); 645 INSTKEYWORD(unwind, Unwind); 646 INSTKEYWORD(unreachable, Unreachable); 647 648 INSTKEYWORD(alloca, Alloca); 649 INSTKEYWORD(free, Free); 650 INSTKEYWORD(load, Load); 651 INSTKEYWORD(store, Store); 652 INSTKEYWORD(getelementptr, GetElementPtr); 653 654 INSTKEYWORD(extractelement, ExtractElement); 655 INSTKEYWORD(insertelement, InsertElement); 656 INSTKEYWORD(shufflevector, ShuffleVector); 657 INSTKEYWORD(getresult, ExtractValue); 658 INSTKEYWORD(extractvalue, ExtractValue); 659 INSTKEYWORD(insertvalue, InsertValue); 660#undef INSTKEYWORD 661 662 // Check for [us]0x[0-9A-Fa-f]+ which are Hexadecimal constant generated by 663 // the CFE to avoid forcing it to deal with 64-bit numbers. 664 if ((TokStart[0] == 'u' || TokStart[0] == 's') && 665 TokStart[1] == '0' && TokStart[2] == 'x' && isxdigit(TokStart[3])) { 666 int len = CurPtr-TokStart-3; 667 uint32_t bits = len * 4; 668 APInt Tmp(bits, StringRef(TokStart+3, len), 16); 669 uint32_t activeBits = Tmp.getActiveBits(); 670 if (activeBits > 0 && activeBits < bits) 671 Tmp.trunc(activeBits); 672 APSIntVal = APSInt(Tmp, TokStart[0] == 'u'); 673 return lltok::APSInt; 674 } 675 676 // If this is "cc1234", return this as just "cc". 677 if (TokStart[0] == 'c' && TokStart[1] == 'c') { 678 CurPtr = TokStart+2; 679 return lltok::kw_cc; 680 } 681 682 // If this starts with "call", return it as CALL. This is to support old 683 // broken .ll files. FIXME: remove this with LLVM 3.0. 684 if (CurPtr-TokStart > 4 && !memcmp(TokStart, "call", 4)) { 685 CurPtr = TokStart+4; 686 UIntVal = Instruction::Call; 687 return lltok::kw_call; 688 } 689 690 // Finally, if this isn't known, return an error. 691 CurPtr = TokStart+1; 692 return lltok::Error; 693} 694 695 696/// Lex0x: Handle productions that start with 0x, knowing that it matches and 697/// that this is not a label: 698/// HexFPConstant 0x[0-9A-Fa-f]+ 699/// HexFP80Constant 0xK[0-9A-Fa-f]+ 700/// HexFP128Constant 0xL[0-9A-Fa-f]+ 701/// HexPPC128Constant 0xM[0-9A-Fa-f]+ 702lltok::Kind LLLexer::Lex0x() { 703 CurPtr = TokStart + 2; 704 705 char Kind; 706 if (CurPtr[0] >= 'K' && CurPtr[0] <= 'M') { 707 Kind = *CurPtr++; 708 } else { 709 Kind = 'J'; 710 } 711 712 if (!isxdigit(CurPtr[0])) { 713 // Bad token, return it as an error. 714 CurPtr = TokStart+1; 715 return lltok::Error; 716 } 717 718 while (isxdigit(CurPtr[0])) 719 ++CurPtr; 720 721 if (Kind == 'J') { 722 // HexFPConstant - Floating point constant represented in IEEE format as a 723 // hexadecimal number for when exponential notation is not precise enough. 724 // Float and double only. 725 APFloatVal = APFloat(BitsToDouble(HexIntToVal(TokStart+2, CurPtr))); 726 return lltok::APFloat; 727 } 728 729 uint64_t Pair[2]; 730 switch (Kind) { 731 default: llvm_unreachable("Unknown kind!"); 732 case 'K': 733 // F80HexFPConstant - x87 long double in hexadecimal format (10 bytes) 734 FP80HexToIntPair(TokStart+3, CurPtr, Pair); 735 APFloatVal = APFloat(APInt(80, 2, Pair)); 736 return lltok::APFloat; 737 case 'L': 738 // F128HexFPConstant - IEEE 128-bit in hexadecimal format (16 bytes) 739 HexToIntPair(TokStart+3, CurPtr, Pair); 740 APFloatVal = APFloat(APInt(128, 2, Pair), true); 741 return lltok::APFloat; 742 case 'M': 743 // PPC128HexFPConstant - PowerPC 128-bit in hexadecimal format (16 bytes) 744 HexToIntPair(TokStart+3, CurPtr, Pair); 745 APFloatVal = APFloat(APInt(128, 2, Pair)); 746 return lltok::APFloat; 747 } 748} 749 750/// LexIdentifier: Handle several related productions: 751/// Label [-a-zA-Z$._0-9]+: 752/// NInteger -[0-9]+ 753/// FPConstant [-+]?[0-9]+[.][0-9]*([eE][-+]?[0-9]+)? 754/// PInteger [0-9]+ 755/// HexFPConstant 0x[0-9A-Fa-f]+ 756/// HexFP80Constant 0xK[0-9A-Fa-f]+ 757/// HexFP128Constant 0xL[0-9A-Fa-f]+ 758/// HexPPC128Constant 0xM[0-9A-Fa-f]+ 759lltok::Kind LLLexer::LexDigitOrNegative() { 760 // If the letter after the negative is a number, this is probably a label. 761 if (!isdigit(TokStart[0]) && !isdigit(CurPtr[0])) { 762 // Okay, this is not a number after the -, it's probably a label. 763 if (const char *End = isLabelTail(CurPtr)) { 764 StrVal.assign(TokStart, End-1); 765 CurPtr = End; 766 return lltok::LabelStr; 767 } 768 769 return lltok::Error; 770 } 771 772 // At this point, it is either a label, int or fp constant. 773 774 // Skip digits, we have at least one. 775 for (; isdigit(CurPtr[0]); ++CurPtr) 776 /*empty*/; 777 778 // Check to see if this really is a label afterall, e.g. "-1:". 779 if (isLabelChar(CurPtr[0]) || CurPtr[0] == ':') { 780 if (const char *End = isLabelTail(CurPtr)) { 781 StrVal.assign(TokStart, End-1); 782 CurPtr = End; 783 return lltok::LabelStr; 784 } 785 } 786 787 // If the next character is a '.', then it is a fp value, otherwise its 788 // integer. 789 if (CurPtr[0] != '.') { 790 if (TokStart[0] == '0' && TokStart[1] == 'x') 791 return Lex0x(); 792 unsigned Len = CurPtr-TokStart; 793 uint32_t numBits = ((Len * 64) / 19) + 2; 794 APInt Tmp(numBits, StringRef(TokStart, Len), 10); 795 if (TokStart[0] == '-') { 796 uint32_t minBits = Tmp.getMinSignedBits(); 797 if (minBits > 0 && minBits < numBits) 798 Tmp.trunc(minBits); 799 APSIntVal = APSInt(Tmp, false); 800 } else { 801 uint32_t activeBits = Tmp.getActiveBits(); 802 if (activeBits > 0 && activeBits < numBits) 803 Tmp.trunc(activeBits); 804 APSIntVal = APSInt(Tmp, true); 805 } 806 return lltok::APSInt; 807 } 808 809 ++CurPtr; 810 811 // Skip over [0-9]*([eE][-+]?[0-9]+)? 812 while (isdigit(CurPtr[0])) ++CurPtr; 813 814 if (CurPtr[0] == 'e' || CurPtr[0] == 'E') { 815 if (isdigit(CurPtr[1]) || 816 ((CurPtr[1] == '-' || CurPtr[1] == '+') && isdigit(CurPtr[2]))) { 817 CurPtr += 2; 818 while (isdigit(CurPtr[0])) ++CurPtr; 819 } 820 } 821 822 APFloatVal = APFloat(atof(TokStart)); 823 return lltok::APFloat; 824} 825 826/// FPConstant [-+]?[0-9]+[.][0-9]*([eE][-+]?[0-9]+)? 827lltok::Kind LLLexer::LexPositive() { 828 // If the letter after the negative is a number, this is probably not a 829 // label. 830 if (!isdigit(CurPtr[0])) 831 return lltok::Error; 832 833 // Skip digits. 834 for (++CurPtr; isdigit(CurPtr[0]); ++CurPtr) 835 /*empty*/; 836 837 // At this point, we need a '.'. 838 if (CurPtr[0] != '.') { 839 CurPtr = TokStart+1; 840 return lltok::Error; 841 } 842 843 ++CurPtr; 844 845 // Skip over [0-9]*([eE][-+]?[0-9]+)? 846 while (isdigit(CurPtr[0])) ++CurPtr; 847 848 if (CurPtr[0] == 'e' || CurPtr[0] == 'E') { 849 if (isdigit(CurPtr[1]) || 850 ((CurPtr[1] == '-' || CurPtr[1] == '+') && isdigit(CurPtr[2]))) { 851 CurPtr += 2; 852 while (isdigit(CurPtr[0])) ++CurPtr; 853 } 854 } 855 856 APFloatVal = APFloat(atof(TokStart)); 857 return lltok::APFloat; 858} 859