LLLexer.cpp revision d1e1703c39742f3c9fc3d27a442ff59bbdbfb5aa
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 <cstdio> 26#include <cstdlib> 27#include <cstring> 28using namespace llvm; 29 30bool LLLexer::Error(LocTy ErrorLoc, const Twine &Msg) const { 31 ErrorInfo = SM.GetMessage(ErrorLoc, Msg, "error"); 32 return true; 33} 34 35//===----------------------------------------------------------------------===// 36// Helper functions. 37//===----------------------------------------------------------------------===// 38 39// atoull - Convert an ascii string of decimal digits into the unsigned long 40// long representation... this does not have to do input error checking, 41// because we know that the input will be matched by a suitable regex... 42// 43uint64_t LLLexer::atoull(const char *Buffer, const char *End) { 44 uint64_t Result = 0; 45 for (; Buffer != End; Buffer++) { 46 uint64_t OldRes = Result; 47 Result *= 10; 48 Result += *Buffer-'0'; 49 if (Result < OldRes) { // Uh, oh, overflow detected!!! 50 Error("constant bigger than 64 bits detected!"); 51 return 0; 52 } 53 } 54 return Result; 55} 56 57uint64_t LLLexer::HexIntToVal(const char *Buffer, const char *End) { 58 uint64_t Result = 0; 59 for (; Buffer != End; ++Buffer) { 60 uint64_t OldRes = Result; 61 Result *= 16; 62 char C = *Buffer; 63 if (C >= '0' && C <= '9') 64 Result += C-'0'; 65 else if (C >= 'A' && C <= 'F') 66 Result += C-'A'+10; 67 else if (C >= 'a' && C <= 'f') 68 Result += C-'a'+10; 69 70 if (Result < OldRes) { // Uh, oh, overflow detected!!! 71 Error("constant bigger than 64 bits detected!"); 72 return 0; 73 } 74 } 75 return Result; 76} 77 78void LLLexer::HexToIntPair(const char *Buffer, const char *End, 79 uint64_t Pair[2]) { 80 Pair[0] = 0; 81 for (int i=0; i<16; i++, Buffer++) { 82 assert(Buffer != End); 83 Pair[0] *= 16; 84 char C = *Buffer; 85 if (C >= '0' && C <= '9') 86 Pair[0] += C-'0'; 87 else if (C >= 'A' && C <= 'F') 88 Pair[0] += C-'A'+10; 89 else if (C >= 'a' && C <= 'f') 90 Pair[0] += C-'a'+10; 91 } 92 Pair[1] = 0; 93 for (int i=0; i<16 && Buffer != End; i++, Buffer++) { 94 Pair[1] *= 16; 95 char C = *Buffer; 96 if (C >= '0' && C <= '9') 97 Pair[1] += C-'0'; 98 else if (C >= 'A' && C <= 'F') 99 Pair[1] += C-'A'+10; 100 else if (C >= 'a' && C <= 'f') 101 Pair[1] += C-'a'+10; 102 } 103 if (Buffer != End) 104 Error("constant bigger than 128 bits detected!"); 105} 106 107/// FP80HexToIntPair - translate an 80 bit FP80 number (20 hexits) into 108/// { low64, high16 } as usual for an APInt. 109void LLLexer::FP80HexToIntPair(const char *Buffer, const char *End, 110 uint64_t Pair[2]) { 111 Pair[1] = 0; 112 for (int i=0; i<4 && Buffer != End; i++, Buffer++) { 113 assert(Buffer != End); 114 Pair[1] *= 16; 115 char C = *Buffer; 116 if (C >= '0' && C <= '9') 117 Pair[1] += C-'0'; 118 else if (C >= 'A' && C <= 'F') 119 Pair[1] += C-'A'+10; 120 else if (C >= 'a' && C <= 'f') 121 Pair[1] += C-'a'+10; 122 } 123 Pair[0] = 0; 124 for (int i=0; i<16; i++, Buffer++) { 125 Pair[0] *= 16; 126 char C = *Buffer; 127 if (C >= '0' && C <= '9') 128 Pair[0] += C-'0'; 129 else if (C >= 'A' && C <= 'F') 130 Pair[0] += C-'A'+10; 131 else if (C >= 'a' && C <= 'f') 132 Pair[0] += C-'a'+10; 133 } 134 if (Buffer != End) 135 Error("constant bigger than 128 bits detected!"); 136} 137 138// UnEscapeLexed - Run through the specified buffer and change \xx codes to the 139// appropriate character. 140static void UnEscapeLexed(std::string &Str) { 141 if (Str.empty()) return; 142 143 char *Buffer = &Str[0], *EndBuffer = Buffer+Str.size(); 144 char *BOut = Buffer; 145 for (char *BIn = Buffer; BIn != EndBuffer; ) { 146 if (BIn[0] == '\\') { 147 if (BIn < EndBuffer-1 && BIn[1] == '\\') { 148 *BOut++ = '\\'; // Two \ becomes one 149 BIn += 2; 150 } else if (BIn < EndBuffer-2 && isxdigit(BIn[1]) && isxdigit(BIn[2])) { 151 char Tmp = BIn[3]; BIn[3] = 0; // Terminate string 152 *BOut = (char)strtol(BIn+1, 0, 16); // Convert to number 153 BIn[3] = Tmp; // Restore character 154 BIn += 3; // Skip over handled chars 155 ++BOut; 156 } else { 157 *BOut++ = *BIn++; 158 } 159 } else { 160 *BOut++ = *BIn++; 161 } 162 } 163 Str.resize(BOut-Buffer); 164} 165 166/// isLabelChar - Return true for [-a-zA-Z$._0-9]. 167static bool isLabelChar(char C) { 168 return isalnum(C) || C == '-' || C == '$' || C == '.' || C == '_'; 169} 170 171 172/// isLabelTail - Return true if this pointer points to a valid end of a label. 173static const char *isLabelTail(const char *CurPtr) { 174 while (1) { 175 if (CurPtr[0] == ':') return CurPtr+1; 176 if (!isLabelChar(CurPtr[0])) return 0; 177 ++CurPtr; 178 } 179} 180 181 182 183//===----------------------------------------------------------------------===// 184// Lexer definition. 185//===----------------------------------------------------------------------===// 186 187LLLexer::LLLexer(MemoryBuffer *StartBuf, SourceMgr &sm, SMDiagnostic &Err, 188 LLVMContext &C) 189 : CurBuf(StartBuf), ErrorInfo(Err), SM(sm), Context(C), APFloatVal(0.0) { 190 CurPtr = CurBuf->getBufferStart(); 191} 192 193std::string LLLexer::getFilename() const { 194 return CurBuf->getBufferIdentifier(); 195} 196 197int LLLexer::getNextChar() { 198 char CurChar = *CurPtr++; 199 switch (CurChar) { 200 default: return (unsigned char)CurChar; 201 case 0: 202 // A nul character in the stream is either the end of the current buffer or 203 // a random nul in the file. Disambiguate that here. 204 if (CurPtr-1 != CurBuf->getBufferEnd()) 205 return 0; // Just whitespace. 206 207 // Otherwise, return end of file. 208 --CurPtr; // Another call to lex will return EOF again. 209 return EOF; 210 } 211} 212 213 214lltok::Kind LLLexer::LexToken() { 215 TokStart = CurPtr; 216 217 int CurChar = getNextChar(); 218 switch (CurChar) { 219 default: 220 // Handle letters: [a-zA-Z_] 221 if (isalpha(CurChar) || CurChar == '_') 222 return LexIdentifier(); 223 224 return lltok::Error; 225 case EOF: return lltok::Eof; 226 case 0: 227 case ' ': 228 case '\t': 229 case '\n': 230 case '\r': 231 // Ignore whitespace. 232 return LexToken(); 233 case '+': return LexPositive(); 234 case '@': return LexAt(); 235 case '%': return LexPercent(); 236 case '"': return LexQuote(); 237 case '.': 238 if (const char *Ptr = isLabelTail(CurPtr)) { 239 CurPtr = Ptr; 240 StrVal.assign(TokStart, CurPtr-1); 241 return lltok::LabelStr; 242 } 243 if (CurPtr[0] == '.' && CurPtr[1] == '.') { 244 CurPtr += 2; 245 return lltok::dotdotdot; 246 } 247 return lltok::Error; 248 case '$': 249 if (const char *Ptr = isLabelTail(CurPtr)) { 250 CurPtr = Ptr; 251 StrVal.assign(TokStart, CurPtr-1); 252 return lltok::LabelStr; 253 } 254 return lltok::Error; 255 case ';': 256 SkipLineComment(); 257 return LexToken(); 258 case '!': return LexExclaim(); 259 case '0': case '1': case '2': case '3': case '4': 260 case '5': case '6': case '7': case '8': case '9': 261 case '-': 262 return LexDigitOrNegative(); 263 case '=': return lltok::equal; 264 case '[': return lltok::lsquare; 265 case ']': return lltok::rsquare; 266 case '{': return lltok::lbrace; 267 case '}': return lltok::rbrace; 268 case '<': return lltok::less; 269 case '>': return lltok::greater; 270 case '(': return lltok::lparen; 271 case ')': return lltok::rparen; 272 case ',': return lltok::comma; 273 case '*': return lltok::star; 274 case '\\': return lltok::backslash; 275 } 276} 277 278void LLLexer::SkipLineComment() { 279 while (1) { 280 if (CurPtr[0] == '\n' || CurPtr[0] == '\r' || getNextChar() == EOF) 281 return; 282 } 283} 284 285/// LexAt - Lex all tokens that start with an @ character: 286/// GlobalVar @\"[^\"]*\" 287/// GlobalVar @[-a-zA-Z$._][-a-zA-Z$._0-9]* 288/// GlobalVarID @[0-9]+ 289lltok::Kind LLLexer::LexAt() { 290 // Handle AtStringConstant: @\"[^\"]*\" 291 if (CurPtr[0] == '"') { 292 ++CurPtr; 293 294 while (1) { 295 int CurChar = getNextChar(); 296 297 if (CurChar == EOF) { 298 Error("end of file in global variable name"); 299 return lltok::Error; 300 } 301 if (CurChar == '"') { 302 StrVal.assign(TokStart+2, CurPtr-1); 303 UnEscapeLexed(StrVal); 304 return lltok::GlobalVar; 305 } 306 } 307 } 308 309 // Handle GlobalVarName: @[-a-zA-Z$._][-a-zA-Z$._0-9]* 310 if (isalpha(CurPtr[0]) || CurPtr[0] == '-' || CurPtr[0] == '$' || 311 CurPtr[0] == '.' || CurPtr[0] == '_') { 312 ++CurPtr; 313 while (isalnum(CurPtr[0]) || CurPtr[0] == '-' || CurPtr[0] == '$' || 314 CurPtr[0] == '.' || CurPtr[0] == '_') 315 ++CurPtr; 316 317 StrVal.assign(TokStart+1, CurPtr); // Skip @ 318 return lltok::GlobalVar; 319 } 320 321 // Handle GlobalVarID: @[0-9]+ 322 if (isdigit(CurPtr[0])) { 323 for (++CurPtr; isdigit(CurPtr[0]); ++CurPtr) 324 /*empty*/; 325 326 uint64_t Val = atoull(TokStart+1, CurPtr); 327 if ((unsigned)Val != Val) 328 Error("invalid value number (too large)!"); 329 UIntVal = unsigned(Val); 330 return lltok::GlobalID; 331 } 332 333 return lltok::Error; 334} 335 336 337/// LexPercent - Lex all tokens that start with a % character: 338/// LocalVar ::= %\"[^\"]*\" 339/// LocalVar ::= %[-a-zA-Z$._][-a-zA-Z$._0-9]* 340/// LocalVarID ::= %[0-9]+ 341lltok::Kind LLLexer::LexPercent() { 342 // Handle LocalVarName: %\"[^\"]*\" 343 if (CurPtr[0] == '"') { 344 ++CurPtr; 345 346 while (1) { 347 int CurChar = getNextChar(); 348 349 if (CurChar == EOF) { 350 Error("end of file in string constant"); 351 return lltok::Error; 352 } 353 if (CurChar == '"') { 354 StrVal.assign(TokStart+2, CurPtr-1); 355 UnEscapeLexed(StrVal); 356 return lltok::LocalVar; 357 } 358 } 359 } 360 361 // Handle LocalVarName: %[-a-zA-Z$._][-a-zA-Z$._0-9]* 362 if (isalpha(CurPtr[0]) || CurPtr[0] == '-' || CurPtr[0] == '$' || 363 CurPtr[0] == '.' || CurPtr[0] == '_') { 364 ++CurPtr; 365 while (isalnum(CurPtr[0]) || CurPtr[0] == '-' || CurPtr[0] == '$' || 366 CurPtr[0] == '.' || CurPtr[0] == '_') 367 ++CurPtr; 368 369 StrVal.assign(TokStart+1, CurPtr); // Skip % 370 return lltok::LocalVar; 371 } 372 373 // Handle LocalVarID: %[0-9]+ 374 if (isdigit(CurPtr[0])) { 375 for (++CurPtr; isdigit(CurPtr[0]); ++CurPtr) 376 /*empty*/; 377 378 uint64_t Val = atoull(TokStart+1, CurPtr); 379 if ((unsigned)Val != Val) 380 Error("invalid value number (too large)!"); 381 UIntVal = unsigned(Val); 382 return lltok::LocalVarID; 383 } 384 385 return lltok::Error; 386} 387 388/// LexQuote - Lex all tokens that start with a " character: 389/// QuoteLabel "[^"]+": 390/// StringConstant "[^"]*" 391lltok::Kind LLLexer::LexQuote() { 392 while (1) { 393 int CurChar = getNextChar(); 394 395 if (CurChar == EOF) { 396 Error("end of file in quoted string"); 397 return lltok::Error; 398 } 399 400 if (CurChar != '"') continue; 401 402 if (CurPtr[0] != ':') { 403 StrVal.assign(TokStart+1, CurPtr-1); 404 UnEscapeLexed(StrVal); 405 return lltok::StringConstant; 406 } 407 408 ++CurPtr; 409 StrVal.assign(TokStart+1, CurPtr-2); 410 UnEscapeLexed(StrVal); 411 return lltok::LabelStr; 412 } 413} 414 415static bool JustWhitespaceNewLine(const char *&Ptr) { 416 const char *ThisPtr = Ptr; 417 while (*ThisPtr == ' ' || *ThisPtr == '\t') 418 ++ThisPtr; 419 if (*ThisPtr == '\n' || *ThisPtr == '\r') { 420 Ptr = ThisPtr; 421 return true; 422 } 423 return false; 424} 425 426/// LexExclaim: 427/// !foo 428/// ! 429lltok::Kind LLLexer::LexExclaim() { 430 // Lex a metadata name as a MetadataVar. 431 if (isalpha(CurPtr[0])) { 432 ++CurPtr; 433 while (isalnum(CurPtr[0]) || CurPtr[0] == '-' || CurPtr[0] == '$' || 434 CurPtr[0] == '.' || CurPtr[0] == '_') 435 ++CurPtr; 436 437 StrVal.assign(TokStart+1, CurPtr); // Skip ! 438 return lltok::MetadataVar; 439 } 440 return lltok::exclaim; 441} 442 443/// LexIdentifier: Handle several related productions: 444/// Label [-a-zA-Z$._0-9]+: 445/// IntegerType i[0-9]+ 446/// Keyword sdiv, float, ... 447/// HexIntConstant [us]0x[0-9A-Fa-f]+ 448lltok::Kind LLLexer::LexIdentifier() { 449 const char *StartChar = CurPtr; 450 const char *IntEnd = CurPtr[-1] == 'i' ? 0 : StartChar; 451 const char *KeywordEnd = 0; 452 453 for (; isLabelChar(*CurPtr); ++CurPtr) { 454 // If we decide this is an integer, remember the end of the sequence. 455 if (!IntEnd && !isdigit(*CurPtr)) IntEnd = CurPtr; 456 if (!KeywordEnd && !isalnum(*CurPtr) && *CurPtr != '_') KeywordEnd = CurPtr; 457 } 458 459 // If we stopped due to a colon, this really is a label. 460 if (*CurPtr == ':') { 461 StrVal.assign(StartChar-1, CurPtr++); 462 return lltok::LabelStr; 463 } 464 465 // Otherwise, this wasn't a label. If this was valid as an integer type, 466 // return it. 467 if (IntEnd == 0) IntEnd = CurPtr; 468 if (IntEnd != StartChar) { 469 CurPtr = IntEnd; 470 uint64_t NumBits = atoull(StartChar, CurPtr); 471 if (NumBits < IntegerType::MIN_INT_BITS || 472 NumBits > IntegerType::MAX_INT_BITS) { 473 Error("bitwidth for integer type out of range!"); 474 return lltok::Error; 475 } 476 TyVal = IntegerType::get(Context, NumBits); 477 return lltok::Type; 478 } 479 480 // Otherwise, this was a letter sequence. See which keyword this is. 481 if (KeywordEnd == 0) KeywordEnd = CurPtr; 482 CurPtr = KeywordEnd; 483 --StartChar; 484 unsigned Len = CurPtr-StartChar; 485#define KEYWORD(STR) \ 486 if (Len == strlen(#STR) && !memcmp(StartChar, #STR, strlen(#STR))) \ 487 return lltok::kw_##STR; 488 489 KEYWORD(begin); KEYWORD(end); 490 KEYWORD(true); KEYWORD(false); 491 KEYWORD(declare); KEYWORD(define); 492 KEYWORD(global); KEYWORD(constant); 493 494 KEYWORD(private); 495 KEYWORD(linker_private); 496 KEYWORD(linker_private_weak); 497 KEYWORD(linker_private_weak_def_auto); 498 KEYWORD(internal); 499 KEYWORD(available_externally); 500 KEYWORD(linkonce); 501 KEYWORD(linkonce_odr); 502 KEYWORD(weak); 503 KEYWORD(weak_odr); 504 KEYWORD(appending); 505 KEYWORD(dllimport); 506 KEYWORD(dllexport); 507 KEYWORD(common); 508 KEYWORD(default); 509 KEYWORD(hidden); 510 KEYWORD(protected); 511 KEYWORD(extern_weak); 512 KEYWORD(external); 513 KEYWORD(thread_local); 514 KEYWORD(zeroinitializer); 515 KEYWORD(undef); 516 KEYWORD(null); 517 KEYWORD(to); 518 KEYWORD(tail); 519 KEYWORD(target); 520 KEYWORD(triple); 521 KEYWORD(deplibs); 522 KEYWORD(datalayout); 523 KEYWORD(volatile); 524 KEYWORD(nuw); 525 KEYWORD(nsw); 526 KEYWORD(exact); 527 KEYWORD(inbounds); 528 KEYWORD(align); 529 KEYWORD(addrspace); 530 KEYWORD(section); 531 KEYWORD(alias); 532 KEYWORD(module); 533 KEYWORD(asm); 534 KEYWORD(sideeffect); 535 KEYWORD(alignstack); 536 KEYWORD(gc); 537 538 KEYWORD(ccc); 539 KEYWORD(fastcc); 540 KEYWORD(coldcc); 541 KEYWORD(x86_stdcallcc); 542 KEYWORD(x86_fastcallcc); 543 KEYWORD(x86_thiscallcc); 544 KEYWORD(arm_apcscc); 545 KEYWORD(arm_aapcscc); 546 KEYWORD(arm_aapcs_vfpcc); 547 KEYWORD(msp430_intrcc); 548 KEYWORD(ptx_kernel); 549 KEYWORD(ptx_device); 550 551 KEYWORD(cc); 552 KEYWORD(c); 553 554 KEYWORD(signext); 555 KEYWORD(zeroext); 556 KEYWORD(inreg); 557 KEYWORD(sret); 558 KEYWORD(nounwind); 559 KEYWORD(noreturn); 560 KEYWORD(noalias); 561 KEYWORD(nocapture); 562 KEYWORD(byval); 563 KEYWORD(nest); 564 KEYWORD(readnone); 565 KEYWORD(readonly); 566 567 KEYWORD(inlinehint); 568 KEYWORD(noinline); 569 KEYWORD(alwaysinline); 570 KEYWORD(optsize); 571 KEYWORD(ssp); 572 KEYWORD(sspreq); 573 KEYWORD(noredzone); 574 KEYWORD(noimplicitfloat); 575 KEYWORD(naked); 576 577 KEYWORD(type); 578 KEYWORD(opaque); 579 580 KEYWORD(eq); KEYWORD(ne); KEYWORD(slt); KEYWORD(sgt); KEYWORD(sle); 581 KEYWORD(sge); KEYWORD(ult); KEYWORD(ugt); KEYWORD(ule); KEYWORD(uge); 582 KEYWORD(oeq); KEYWORD(one); KEYWORD(olt); KEYWORD(ogt); KEYWORD(ole); 583 KEYWORD(oge); KEYWORD(ord); KEYWORD(uno); KEYWORD(ueq); KEYWORD(une); 584 585 KEYWORD(x); 586 KEYWORD(blockaddress); 587#undef KEYWORD 588 589 // Keywords for types. 590#define TYPEKEYWORD(STR, LLVMTY) \ 591 if (Len == strlen(STR) && !memcmp(StartChar, STR, strlen(STR))) { \ 592 TyVal = LLVMTY; return lltok::Type; } 593 TYPEKEYWORD("void", Type::getVoidTy(Context)); 594 TYPEKEYWORD("float", Type::getFloatTy(Context)); 595 TYPEKEYWORD("double", Type::getDoubleTy(Context)); 596 TYPEKEYWORD("x86_fp80", Type::getX86_FP80Ty(Context)); 597 TYPEKEYWORD("fp128", Type::getFP128Ty(Context)); 598 TYPEKEYWORD("ppc_fp128", Type::getPPC_FP128Ty(Context)); 599 TYPEKEYWORD("label", Type::getLabelTy(Context)); 600 TYPEKEYWORD("metadata", Type::getMetadataTy(Context)); 601 TYPEKEYWORD("x86_mmx", Type::getX86_MMXTy(Context)); 602#undef TYPEKEYWORD 603 604 // Handle special forms for autoupgrading. Drop these in LLVM 3.0. This is 605 // to avoid conflicting with the sext/zext instructions, below. 606 if (Len == 4 && !memcmp(StartChar, "sext", 4)) { 607 // Scan CurPtr ahead, seeing if there is just whitespace before the newline. 608 if (JustWhitespaceNewLine(CurPtr)) 609 return lltok::kw_signext; 610 } else if (Len == 4 && !memcmp(StartChar, "zext", 4)) { 611 // Scan CurPtr ahead, seeing if there is just whitespace before the newline. 612 if (JustWhitespaceNewLine(CurPtr)) 613 return lltok::kw_zeroext; 614 } else if (Len == 6 && !memcmp(StartChar, "malloc", 6)) { 615 // FIXME: Remove in LLVM 3.0. 616 // Autoupgrade malloc instruction. 617 return lltok::kw_malloc; 618 } else if (Len == 4 && !memcmp(StartChar, "free", 4)) { 619 // FIXME: Remove in LLVM 3.0. 620 // Autoupgrade malloc instruction. 621 return lltok::kw_free; 622 } 623 624 // Keywords for instructions. 625#define INSTKEYWORD(STR, Enum) \ 626 if (Len == strlen(#STR) && !memcmp(StartChar, #STR, strlen(#STR))) { \ 627 UIntVal = Instruction::Enum; return lltok::kw_##STR; } 628 629 INSTKEYWORD(add, Add); INSTKEYWORD(fadd, FAdd); 630 INSTKEYWORD(sub, Sub); INSTKEYWORD(fsub, FSub); 631 INSTKEYWORD(mul, Mul); INSTKEYWORD(fmul, FMul); 632 INSTKEYWORD(udiv, UDiv); INSTKEYWORD(sdiv, SDiv); INSTKEYWORD(fdiv, FDiv); 633 INSTKEYWORD(urem, URem); INSTKEYWORD(srem, SRem); INSTKEYWORD(frem, FRem); 634 INSTKEYWORD(shl, Shl); INSTKEYWORD(lshr, LShr); INSTKEYWORD(ashr, AShr); 635 INSTKEYWORD(and, And); INSTKEYWORD(or, Or); INSTKEYWORD(xor, Xor); 636 INSTKEYWORD(icmp, ICmp); INSTKEYWORD(fcmp, FCmp); 637 638 INSTKEYWORD(phi, PHI); 639 INSTKEYWORD(call, Call); 640 INSTKEYWORD(trunc, Trunc); 641 INSTKEYWORD(zext, ZExt); 642 INSTKEYWORD(sext, SExt); 643 INSTKEYWORD(fptrunc, FPTrunc); 644 INSTKEYWORD(fpext, FPExt); 645 INSTKEYWORD(uitofp, UIToFP); 646 INSTKEYWORD(sitofp, SIToFP); 647 INSTKEYWORD(fptoui, FPToUI); 648 INSTKEYWORD(fptosi, FPToSI); 649 INSTKEYWORD(inttoptr, IntToPtr); 650 INSTKEYWORD(ptrtoint, PtrToInt); 651 INSTKEYWORD(bitcast, BitCast); 652 INSTKEYWORD(select, Select); 653 INSTKEYWORD(va_arg, VAArg); 654 INSTKEYWORD(ret, Ret); 655 INSTKEYWORD(br, Br); 656 INSTKEYWORD(switch, Switch); 657 INSTKEYWORD(indirectbr, IndirectBr); 658 INSTKEYWORD(invoke, Invoke); 659 INSTKEYWORD(unwind, Unwind); 660 INSTKEYWORD(unreachable, Unreachable); 661 662 INSTKEYWORD(alloca, Alloca); 663 INSTKEYWORD(load, Load); 664 INSTKEYWORD(store, Store); 665 INSTKEYWORD(getelementptr, GetElementPtr); 666 667 INSTKEYWORD(extractelement, ExtractElement); 668 INSTKEYWORD(insertelement, InsertElement); 669 INSTKEYWORD(shufflevector, ShuffleVector); 670 INSTKEYWORD(getresult, ExtractValue); 671 INSTKEYWORD(extractvalue, ExtractValue); 672 INSTKEYWORD(insertvalue, InsertValue); 673#undef INSTKEYWORD 674 675 // Check for [us]0x[0-9A-Fa-f]+ which are Hexadecimal constant generated by 676 // the CFE to avoid forcing it to deal with 64-bit numbers. 677 if ((TokStart[0] == 'u' || TokStart[0] == 's') && 678 TokStart[1] == '0' && TokStart[2] == 'x' && isxdigit(TokStart[3])) { 679 int len = CurPtr-TokStart-3; 680 uint32_t bits = len * 4; 681 APInt Tmp(bits, StringRef(TokStart+3, len), 16); 682 uint32_t activeBits = Tmp.getActiveBits(); 683 if (activeBits > 0 && activeBits < bits) 684 Tmp.trunc(activeBits); 685 APSIntVal = APSInt(Tmp, TokStart[0] == 'u'); 686 return lltok::APSInt; 687 } 688 689 // If this is "cc1234", return this as just "cc". 690 if (TokStart[0] == 'c' && TokStart[1] == 'c') { 691 CurPtr = TokStart+2; 692 return lltok::kw_cc; 693 } 694 695 // If this starts with "call", return it as CALL. This is to support old 696 // broken .ll files. FIXME: remove this with LLVM 3.0. 697 if (CurPtr-TokStart > 4 && !memcmp(TokStart, "call", 4)) { 698 CurPtr = TokStart+4; 699 UIntVal = Instruction::Call; 700 return lltok::kw_call; 701 } 702 703 // Finally, if this isn't known, return an error. 704 CurPtr = TokStart+1; 705 return lltok::Error; 706} 707 708 709/// Lex0x: Handle productions that start with 0x, knowing that it matches and 710/// that this is not a label: 711/// HexFPConstant 0x[0-9A-Fa-f]+ 712/// HexFP80Constant 0xK[0-9A-Fa-f]+ 713/// HexFP128Constant 0xL[0-9A-Fa-f]+ 714/// HexPPC128Constant 0xM[0-9A-Fa-f]+ 715lltok::Kind LLLexer::Lex0x() { 716 CurPtr = TokStart + 2; 717 718 char Kind; 719 if (CurPtr[0] >= 'K' && CurPtr[0] <= 'M') { 720 Kind = *CurPtr++; 721 } else { 722 Kind = 'J'; 723 } 724 725 if (!isxdigit(CurPtr[0])) { 726 // Bad token, return it as an error. 727 CurPtr = TokStart+1; 728 return lltok::Error; 729 } 730 731 while (isxdigit(CurPtr[0])) 732 ++CurPtr; 733 734 if (Kind == 'J') { 735 // HexFPConstant - Floating point constant represented in IEEE format as a 736 // hexadecimal number for when exponential notation is not precise enough. 737 // Float and double only. 738 APFloatVal = APFloat(BitsToDouble(HexIntToVal(TokStart+2, CurPtr))); 739 return lltok::APFloat; 740 } 741 742 uint64_t Pair[2]; 743 switch (Kind) { 744 default: llvm_unreachable("Unknown kind!"); 745 case 'K': 746 // F80HexFPConstant - x87 long double in hexadecimal format (10 bytes) 747 FP80HexToIntPair(TokStart+3, CurPtr, Pair); 748 APFloatVal = APFloat(APInt(80, 2, Pair)); 749 return lltok::APFloat; 750 case 'L': 751 // F128HexFPConstant - IEEE 128-bit in hexadecimal format (16 bytes) 752 HexToIntPair(TokStart+3, CurPtr, Pair); 753 APFloatVal = APFloat(APInt(128, 2, Pair), true); 754 return lltok::APFloat; 755 case 'M': 756 // PPC128HexFPConstant - PowerPC 128-bit in hexadecimal format (16 bytes) 757 HexToIntPair(TokStart+3, CurPtr, Pair); 758 APFloatVal = APFloat(APInt(128, 2, Pair)); 759 return lltok::APFloat; 760 } 761} 762 763/// LexIdentifier: Handle several related productions: 764/// Label [-a-zA-Z$._0-9]+: 765/// NInteger -[0-9]+ 766/// FPConstant [-+]?[0-9]+[.][0-9]*([eE][-+]?[0-9]+)? 767/// PInteger [0-9]+ 768/// HexFPConstant 0x[0-9A-Fa-f]+ 769/// HexFP80Constant 0xK[0-9A-Fa-f]+ 770/// HexFP128Constant 0xL[0-9A-Fa-f]+ 771/// HexPPC128Constant 0xM[0-9A-Fa-f]+ 772lltok::Kind LLLexer::LexDigitOrNegative() { 773 // If the letter after the negative is a number, this is probably a label. 774 if (!isdigit(TokStart[0]) && !isdigit(CurPtr[0])) { 775 // Okay, this is not a number after the -, it's probably a label. 776 if (const char *End = isLabelTail(CurPtr)) { 777 StrVal.assign(TokStart, End-1); 778 CurPtr = End; 779 return lltok::LabelStr; 780 } 781 782 return lltok::Error; 783 } 784 785 // At this point, it is either a label, int or fp constant. 786 787 // Skip digits, we have at least one. 788 for (; isdigit(CurPtr[0]); ++CurPtr) 789 /*empty*/; 790 791 // Check to see if this really is a label afterall, e.g. "-1:". 792 if (isLabelChar(CurPtr[0]) || CurPtr[0] == ':') { 793 if (const char *End = isLabelTail(CurPtr)) { 794 StrVal.assign(TokStart, End-1); 795 CurPtr = End; 796 return lltok::LabelStr; 797 } 798 } 799 800 // If the next character is a '.', then it is a fp value, otherwise its 801 // integer. 802 if (CurPtr[0] != '.') { 803 if (TokStart[0] == '0' && TokStart[1] == 'x') 804 return Lex0x(); 805 unsigned Len = CurPtr-TokStart; 806 uint32_t numBits = ((Len * 64) / 19) + 2; 807 APInt Tmp(numBits, StringRef(TokStart, Len), 10); 808 if (TokStart[0] == '-') { 809 uint32_t minBits = Tmp.getMinSignedBits(); 810 if (minBits > 0 && minBits < numBits) 811 Tmp.trunc(minBits); 812 APSIntVal = APSInt(Tmp, false); 813 } else { 814 uint32_t activeBits = Tmp.getActiveBits(); 815 if (activeBits > 0 && activeBits < numBits) 816 Tmp.trunc(activeBits); 817 APSIntVal = APSInt(Tmp, true); 818 } 819 return lltok::APSInt; 820 } 821 822 ++CurPtr; 823 824 // Skip over [0-9]*([eE][-+]?[0-9]+)? 825 while (isdigit(CurPtr[0])) ++CurPtr; 826 827 if (CurPtr[0] == 'e' || CurPtr[0] == 'E') { 828 if (isdigit(CurPtr[1]) || 829 ((CurPtr[1] == '-' || CurPtr[1] == '+') && isdigit(CurPtr[2]))) { 830 CurPtr += 2; 831 while (isdigit(CurPtr[0])) ++CurPtr; 832 } 833 } 834 835 APFloatVal = APFloat(atof(TokStart)); 836 return lltok::APFloat; 837} 838 839/// FPConstant [-+]?[0-9]+[.][0-9]*([eE][-+]?[0-9]+)? 840lltok::Kind LLLexer::LexPositive() { 841 // If the letter after the negative is a number, this is probably not a 842 // label. 843 if (!isdigit(CurPtr[0])) 844 return lltok::Error; 845 846 // Skip digits. 847 for (++CurPtr; isdigit(CurPtr[0]); ++CurPtr) 848 /*empty*/; 849 850 // At this point, we need a '.'. 851 if (CurPtr[0] != '.') { 852 CurPtr = TokStart+1; 853 return lltok::Error; 854 } 855 856 ++CurPtr; 857 858 // Skip over [0-9]*([eE][-+]?[0-9]+)? 859 while (isdigit(CurPtr[0])) ++CurPtr; 860 861 if (CurPtr[0] == 'e' || CurPtr[0] == 'E') { 862 if (isdigit(CurPtr[1]) || 863 ((CurPtr[1] == '-' || CurPtr[1] == '+') && isdigit(CurPtr[2]))) { 864 CurPtr += 2; 865 while (isdigit(CurPtr[0])) ++CurPtr; 866 } 867 } 868 869 APFloatVal = APFloat(atof(TokStart)); 870 return lltok::APFloat; 871} 872