LLLexer.cpp revision 207855cff9b4811004b9720f28a5bd0adf3784b7
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 '$': 248 if (const char *Ptr = isLabelTail(CurPtr)) { 249 CurPtr = Ptr; 250 StrVal.assign(TokStart, CurPtr-1); 251 return lltok::LabelStr; 252 } 253 return lltok::Error; 254 case ';': 255 SkipLineComment(); 256 return LexToken(); 257 case '!': return LexExclaim(); 258 case '0': case '1': case '2': case '3': case '4': 259 case '5': case '6': case '7': case '8': case '9': 260 case '-': 261 return LexDigitOrNegative(); 262 case '=': return lltok::equal; 263 case '[': return lltok::lsquare; 264 case ']': return lltok::rsquare; 265 case '{': return lltok::lbrace; 266 case '}': return lltok::rbrace; 267 case '<': return lltok::less; 268 case '>': return lltok::greater; 269 case '(': return lltok::lparen; 270 case ')': return lltok::rparen; 271 case ',': return lltok::comma; 272 case '*': return lltok::star; 273 case '\\': return lltok::backslash; 274 } 275} 276 277void LLLexer::SkipLineComment() { 278 while (1) { 279 if (CurPtr[0] == '\n' || CurPtr[0] == '\r' || getNextChar() == EOF) 280 return; 281 } 282} 283 284/// LexAt - Lex all tokens that start with an @ character: 285/// GlobalVar @\"[^\"]*\" 286/// GlobalVar @[-a-zA-Z$._][-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] == '$' || 365 CurPtr[0] == '.' || CurPtr[0] == '_') 366 ++CurPtr; 367 368 StrVal.assign(TokStart+1, CurPtr); // Skip % 369 return lltok::LocalVar; 370 } 371 372 // Handle LocalVarID: %[0-9]+ 373 if (isdigit(CurPtr[0])) { 374 for (++CurPtr; isdigit(CurPtr[0]); ++CurPtr) 375 /*empty*/; 376 377 uint64_t Val = atoull(TokStart+1, CurPtr); 378 if ((unsigned)Val != Val) 379 Error("invalid value number (too large)!"); 380 UIntVal = unsigned(Val); 381 return lltok::LocalVarID; 382 } 383 384 return lltok::Error; 385} 386 387/// LexQuote - Lex all tokens that start with a " character: 388/// QuoteLabel "[^"]+": 389/// StringConstant "[^"]*" 390lltok::Kind LLLexer::LexQuote() { 391 while (1) { 392 int CurChar = getNextChar(); 393 394 if (CurChar == EOF) { 395 Error("end of file in quoted string"); 396 return lltok::Error; 397 } 398 399 if (CurChar != '"') continue; 400 401 if (CurPtr[0] != ':') { 402 StrVal.assign(TokStart+1, CurPtr-1); 403 UnEscapeLexed(StrVal); 404 return lltok::StringConstant; 405 } 406 407 ++CurPtr; 408 StrVal.assign(TokStart+1, CurPtr-2); 409 UnEscapeLexed(StrVal); 410 return lltok::LabelStr; 411 } 412} 413 414static bool JustWhitespaceNewLine(const char *&Ptr) { 415 const char *ThisPtr = Ptr; 416 while (*ThisPtr == ' ' || *ThisPtr == '\t') 417 ++ThisPtr; 418 if (*ThisPtr == '\n' || *ThisPtr == '\r') { 419 Ptr = ThisPtr; 420 return true; 421 } 422 return false; 423} 424 425/// LexExclaim: 426/// !foo 427/// ! 428lltok::Kind LLLexer::LexExclaim() { 429 // Lex a metadata name as a MetadataVar. 430 if (isalpha(CurPtr[0])) { 431 ++CurPtr; 432 while (isalnum(CurPtr[0]) || CurPtr[0] == '-' || CurPtr[0] == '$' || 433 CurPtr[0] == '.' || CurPtr[0] == '_') 434 ++CurPtr; 435 436 StrVal.assign(TokStart+1, CurPtr); // Skip ! 437 return lltok::MetadataVar; 438 } 439 return lltok::exclaim; 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(linker_weak); 496 KEYWORD(internal); 497 KEYWORD(available_externally); 498 KEYWORD(linkonce); 499 KEYWORD(linkonce_odr); 500 KEYWORD(weak); 501 KEYWORD(weak_odr); 502 KEYWORD(appending); 503 KEYWORD(dllimport); 504 KEYWORD(dllexport); 505 KEYWORD(common); 506 KEYWORD(default); 507 KEYWORD(hidden); 508 KEYWORD(protected); 509 KEYWORD(extern_weak); 510 KEYWORD(external); 511 KEYWORD(thread_local); 512 KEYWORD(zeroinitializer); 513 KEYWORD(undef); 514 KEYWORD(null); 515 KEYWORD(to); 516 KEYWORD(tail); 517 KEYWORD(target); 518 KEYWORD(triple); 519 KEYWORD(deplibs); 520 KEYWORD(datalayout); 521 KEYWORD(volatile); 522 KEYWORD(nuw); 523 KEYWORD(nsw); 524 KEYWORD(exact); 525 KEYWORD(inbounds); 526 KEYWORD(align); 527 KEYWORD(addrspace); 528 KEYWORD(section); 529 KEYWORD(alias); 530 KEYWORD(module); 531 KEYWORD(asm); 532 KEYWORD(sideeffect); 533 KEYWORD(alignstack); 534 KEYWORD(gc); 535 536 KEYWORD(ccc); 537 KEYWORD(fastcc); 538 KEYWORD(coldcc); 539 KEYWORD(x86_stdcallcc); 540 KEYWORD(x86_fastcallcc); 541 KEYWORD(x86_thiscallcc); 542 KEYWORD(arm_apcscc); 543 KEYWORD(arm_aapcscc); 544 KEYWORD(arm_aapcs_vfpcc); 545 KEYWORD(msp430_intrcc); 546 547 KEYWORD(cc); 548 KEYWORD(c); 549 550 KEYWORD(signext); 551 KEYWORD(zeroext); 552 KEYWORD(inreg); 553 KEYWORD(sret); 554 KEYWORD(nounwind); 555 KEYWORD(noreturn); 556 KEYWORD(noalias); 557 KEYWORD(nocapture); 558 KEYWORD(byval); 559 KEYWORD(nest); 560 KEYWORD(readnone); 561 KEYWORD(readonly); 562 563 KEYWORD(inlinehint); 564 KEYWORD(noinline); 565 KEYWORD(alwaysinline); 566 KEYWORD(optsize); 567 KEYWORD(ssp); 568 KEYWORD(sspreq); 569 KEYWORD(noredzone); 570 KEYWORD(noimplicitfloat); 571 KEYWORD(naked); 572 573 KEYWORD(type); 574 KEYWORD(opaque); 575 KEYWORD(union); 576 577 KEYWORD(eq); KEYWORD(ne); KEYWORD(slt); KEYWORD(sgt); KEYWORD(sle); 578 KEYWORD(sge); KEYWORD(ult); KEYWORD(ugt); KEYWORD(ule); KEYWORD(uge); 579 KEYWORD(oeq); KEYWORD(one); KEYWORD(olt); KEYWORD(ogt); KEYWORD(ole); 580 KEYWORD(oge); KEYWORD(ord); KEYWORD(uno); KEYWORD(ueq); KEYWORD(une); 581 582 KEYWORD(x); 583 KEYWORD(blockaddress); 584#undef KEYWORD 585 586 // Keywords for types. 587#define TYPEKEYWORD(STR, LLVMTY) \ 588 if (Len == strlen(STR) && !memcmp(StartChar, STR, strlen(STR))) { \ 589 TyVal = LLVMTY; return lltok::Type; } 590 TYPEKEYWORD("void", Type::getVoidTy(Context)); 591 TYPEKEYWORD("float", Type::getFloatTy(Context)); 592 TYPEKEYWORD("double", Type::getDoubleTy(Context)); 593 TYPEKEYWORD("x86_fp80", Type::getX86_FP80Ty(Context)); 594 TYPEKEYWORD("fp128", Type::getFP128Ty(Context)); 595 TYPEKEYWORD("ppc_fp128", Type::getPPC_FP128Ty(Context)); 596 TYPEKEYWORD("label", Type::getLabelTy(Context)); 597 TYPEKEYWORD("metadata", Type::getMetadataTy(Context)); 598#undef TYPEKEYWORD 599 600 // Handle special forms for autoupgrading. Drop these in LLVM 3.0. This is 601 // to avoid conflicting with the sext/zext instructions, below. 602 if (Len == 4 && !memcmp(StartChar, "sext", 4)) { 603 // Scan CurPtr ahead, seeing if there is just whitespace before the newline. 604 if (JustWhitespaceNewLine(CurPtr)) 605 return lltok::kw_signext; 606 } else if (Len == 4 && !memcmp(StartChar, "zext", 4)) { 607 // Scan CurPtr ahead, seeing if there is just whitespace before the newline. 608 if (JustWhitespaceNewLine(CurPtr)) 609 return lltok::kw_zeroext; 610 } else if (Len == 6 && !memcmp(StartChar, "malloc", 6)) { 611 // FIXME: Remove in LLVM 3.0. 612 // Autoupgrade malloc instruction. 613 return lltok::kw_malloc; 614 } else if (Len == 4 && !memcmp(StartChar, "free", 4)) { 615 // FIXME: Remove in LLVM 3.0. 616 // Autoupgrade malloc instruction. 617 return lltok::kw_free; 618 } 619 620 // Keywords for instructions. 621#define INSTKEYWORD(STR, Enum) \ 622 if (Len == strlen(#STR) && !memcmp(StartChar, #STR, strlen(#STR))) { \ 623 UIntVal = Instruction::Enum; return lltok::kw_##STR; } 624 625 INSTKEYWORD(add, Add); INSTKEYWORD(fadd, FAdd); 626 INSTKEYWORD(sub, Sub); INSTKEYWORD(fsub, FSub); 627 INSTKEYWORD(mul, Mul); INSTKEYWORD(fmul, FMul); 628 INSTKEYWORD(udiv, UDiv); INSTKEYWORD(sdiv, SDiv); INSTKEYWORD(fdiv, FDiv); 629 INSTKEYWORD(urem, URem); INSTKEYWORD(srem, SRem); INSTKEYWORD(frem, FRem); 630 INSTKEYWORD(shl, Shl); INSTKEYWORD(lshr, LShr); INSTKEYWORD(ashr, AShr); 631 INSTKEYWORD(and, And); INSTKEYWORD(or, Or); INSTKEYWORD(xor, Xor); 632 INSTKEYWORD(icmp, ICmp); INSTKEYWORD(fcmp, FCmp); 633 634 INSTKEYWORD(phi, PHI); 635 INSTKEYWORD(call, Call); 636 INSTKEYWORD(trunc, Trunc); 637 INSTKEYWORD(zext, ZExt); 638 INSTKEYWORD(sext, SExt); 639 INSTKEYWORD(fptrunc, FPTrunc); 640 INSTKEYWORD(fpext, FPExt); 641 INSTKEYWORD(uitofp, UIToFP); 642 INSTKEYWORD(sitofp, SIToFP); 643 INSTKEYWORD(fptoui, FPToUI); 644 INSTKEYWORD(fptosi, FPToSI); 645 INSTKEYWORD(inttoptr, IntToPtr); 646 INSTKEYWORD(ptrtoint, PtrToInt); 647 INSTKEYWORD(bitcast, BitCast); 648 INSTKEYWORD(select, Select); 649 INSTKEYWORD(va_arg, VAArg); 650 INSTKEYWORD(ret, Ret); 651 INSTKEYWORD(br, Br); 652 INSTKEYWORD(switch, Switch); 653 INSTKEYWORD(indirectbr, IndirectBr); 654 INSTKEYWORD(invoke, Invoke); 655 INSTKEYWORD(unwind, Unwind); 656 INSTKEYWORD(unreachable, Unreachable); 657 658 INSTKEYWORD(alloca, Alloca); 659 INSTKEYWORD(load, Load); 660 INSTKEYWORD(store, Store); 661 INSTKEYWORD(getelementptr, GetElementPtr); 662 663 INSTKEYWORD(extractelement, ExtractElement); 664 INSTKEYWORD(insertelement, InsertElement); 665 INSTKEYWORD(shufflevector, ShuffleVector); 666 INSTKEYWORD(getresult, ExtractValue); 667 INSTKEYWORD(extractvalue, ExtractValue); 668 INSTKEYWORD(insertvalue, InsertValue); 669#undef INSTKEYWORD 670 671 // Check for [us]0x[0-9A-Fa-f]+ which are Hexadecimal constant generated by 672 // the CFE to avoid forcing it to deal with 64-bit numbers. 673 if ((TokStart[0] == 'u' || TokStart[0] == 's') && 674 TokStart[1] == '0' && TokStart[2] == 'x' && isxdigit(TokStart[3])) { 675 int len = CurPtr-TokStart-3; 676 uint32_t bits = len * 4; 677 APInt Tmp(bits, StringRef(TokStart+3, len), 16); 678 uint32_t activeBits = Tmp.getActiveBits(); 679 if (activeBits > 0 && activeBits < bits) 680 Tmp.trunc(activeBits); 681 APSIntVal = APSInt(Tmp, TokStart[0] == 'u'); 682 return lltok::APSInt; 683 } 684 685 // If this is "cc1234", return this as just "cc". 686 if (TokStart[0] == 'c' && TokStart[1] == 'c') { 687 CurPtr = TokStart+2; 688 return lltok::kw_cc; 689 } 690 691 // If this starts with "call", return it as CALL. This is to support old 692 // broken .ll files. FIXME: remove this with LLVM 3.0. 693 if (CurPtr-TokStart > 4 && !memcmp(TokStart, "call", 4)) { 694 CurPtr = TokStart+4; 695 UIntVal = Instruction::Call; 696 return lltok::kw_call; 697 } 698 699 // Finally, if this isn't known, return an error. 700 CurPtr = TokStart+1; 701 return lltok::Error; 702} 703 704 705/// Lex0x: Handle productions that start with 0x, knowing that it matches and 706/// that this is not a label: 707/// HexFPConstant 0x[0-9A-Fa-f]+ 708/// HexFP80Constant 0xK[0-9A-Fa-f]+ 709/// HexFP128Constant 0xL[0-9A-Fa-f]+ 710/// HexPPC128Constant 0xM[0-9A-Fa-f]+ 711lltok::Kind LLLexer::Lex0x() { 712 CurPtr = TokStart + 2; 713 714 char Kind; 715 if (CurPtr[0] >= 'K' && CurPtr[0] <= 'M') { 716 Kind = *CurPtr++; 717 } else { 718 Kind = 'J'; 719 } 720 721 if (!isxdigit(CurPtr[0])) { 722 // Bad token, return it as an error. 723 CurPtr = TokStart+1; 724 return lltok::Error; 725 } 726 727 while (isxdigit(CurPtr[0])) 728 ++CurPtr; 729 730 if (Kind == 'J') { 731 // HexFPConstant - Floating point constant represented in IEEE format as a 732 // hexadecimal number for when exponential notation is not precise enough. 733 // Float and double only. 734 APFloatVal = APFloat(BitsToDouble(HexIntToVal(TokStart+2, CurPtr))); 735 return lltok::APFloat; 736 } 737 738 uint64_t Pair[2]; 739 switch (Kind) { 740 default: llvm_unreachable("Unknown kind!"); 741 case 'K': 742 // F80HexFPConstant - x87 long double in hexadecimal format (10 bytes) 743 FP80HexToIntPair(TokStart+3, CurPtr, Pair); 744 APFloatVal = APFloat(APInt(80, 2, Pair)); 745 return lltok::APFloat; 746 case 'L': 747 // F128HexFPConstant - IEEE 128-bit in hexadecimal format (16 bytes) 748 HexToIntPair(TokStart+3, CurPtr, Pair); 749 APFloatVal = APFloat(APInt(128, 2, Pair), true); 750 return lltok::APFloat; 751 case 'M': 752 // PPC128HexFPConstant - PowerPC 128-bit in hexadecimal format (16 bytes) 753 HexToIntPair(TokStart+3, CurPtr, Pair); 754 APFloatVal = APFloat(APInt(128, 2, Pair)); 755 return lltok::APFloat; 756 } 757} 758 759/// LexIdentifier: Handle several related productions: 760/// Label [-a-zA-Z$._0-9]+: 761/// NInteger -[0-9]+ 762/// FPConstant [-+]?[0-9]+[.][0-9]*([eE][-+]?[0-9]+)? 763/// PInteger [0-9]+ 764/// HexFPConstant 0x[0-9A-Fa-f]+ 765/// HexFP80Constant 0xK[0-9A-Fa-f]+ 766/// HexFP128Constant 0xL[0-9A-Fa-f]+ 767/// HexPPC128Constant 0xM[0-9A-Fa-f]+ 768lltok::Kind LLLexer::LexDigitOrNegative() { 769 // If the letter after the negative is a number, this is probably a label. 770 if (!isdigit(TokStart[0]) && !isdigit(CurPtr[0])) { 771 // Okay, this is not a number after the -, it's probably a label. 772 if (const char *End = isLabelTail(CurPtr)) { 773 StrVal.assign(TokStart, End-1); 774 CurPtr = End; 775 return lltok::LabelStr; 776 } 777 778 return lltok::Error; 779 } 780 781 // At this point, it is either a label, int or fp constant. 782 783 // Skip digits, we have at least one. 784 for (; isdigit(CurPtr[0]); ++CurPtr) 785 /*empty*/; 786 787 // Check to see if this really is a label afterall, e.g. "-1:". 788 if (isLabelChar(CurPtr[0]) || CurPtr[0] == ':') { 789 if (const char *End = isLabelTail(CurPtr)) { 790 StrVal.assign(TokStart, End-1); 791 CurPtr = End; 792 return lltok::LabelStr; 793 } 794 } 795 796 // If the next character is a '.', then it is a fp value, otherwise its 797 // integer. 798 if (CurPtr[0] != '.') { 799 if (TokStart[0] == '0' && TokStart[1] == 'x') 800 return Lex0x(); 801 unsigned Len = CurPtr-TokStart; 802 uint32_t numBits = ((Len * 64) / 19) + 2; 803 APInt Tmp(numBits, StringRef(TokStart, Len), 10); 804 if (TokStart[0] == '-') { 805 uint32_t minBits = Tmp.getMinSignedBits(); 806 if (minBits > 0 && minBits < numBits) 807 Tmp.trunc(minBits); 808 APSIntVal = APSInt(Tmp, false); 809 } else { 810 uint32_t activeBits = Tmp.getActiveBits(); 811 if (activeBits > 0 && activeBits < numBits) 812 Tmp.trunc(activeBits); 813 APSIntVal = APSInt(Tmp, true); 814 } 815 return lltok::APSInt; 816 } 817 818 ++CurPtr; 819 820 // Skip over [0-9]*([eE][-+]?[0-9]+)? 821 while (isdigit(CurPtr[0])) ++CurPtr; 822 823 if (CurPtr[0] == 'e' || CurPtr[0] == 'E') { 824 if (isdigit(CurPtr[1]) || 825 ((CurPtr[1] == '-' || CurPtr[1] == '+') && isdigit(CurPtr[2]))) { 826 CurPtr += 2; 827 while (isdigit(CurPtr[0])) ++CurPtr; 828 } 829 } 830 831 APFloatVal = APFloat(atof(TokStart)); 832 return lltok::APFloat; 833} 834 835/// FPConstant [-+]?[0-9]+[.][0-9]*([eE][-+]?[0-9]+)? 836lltok::Kind LLLexer::LexPositive() { 837 // If the letter after the negative is a number, this is probably not a 838 // label. 839 if (!isdigit(CurPtr[0])) 840 return lltok::Error; 841 842 // Skip digits. 843 for (++CurPtr; isdigit(CurPtr[0]); ++CurPtr) 844 /*empty*/; 845 846 // At this point, we need a '.'. 847 if (CurPtr[0] != '.') { 848 CurPtr = TokStart+1; 849 return lltok::Error; 850 } 851 852 ++CurPtr; 853 854 // Skip over [0-9]*([eE][-+]?[0-9]+)? 855 while (isdigit(CurPtr[0])) ++CurPtr; 856 857 if (CurPtr[0] == 'e' || CurPtr[0] == 'E') { 858 if (isdigit(CurPtr[1]) || 859 ((CurPtr[1] == '-' || CurPtr[1] == '+') && isdigit(CurPtr[2]))) { 860 CurPtr += 2; 861 while (isdigit(CurPtr[0])) ++CurPtr; 862 } 863 } 864 865 APFloatVal = APFloat(atof(TokStart)); 866 return lltok::APFloat; 867} 868