1 //===- IntrinsicEmitter.cpp - Generate intrinsic information --------------===// 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 // This tablegen backend emits information about intrinsic functions. 11 // 12 //===----------------------------------------------------------------------===// 13 14 #include "CodeGenIntrinsics.h" 15 #include "CodeGenTarget.h" 16 #include "SequenceToOffsetTable.h" 17 #include "llvm/ADT/StringExtras.h" 18 #include "llvm/TableGen/Record.h" 19 #include "llvm/TableGen/StringMatcher.h" 20 #include "llvm/TableGen/TableGenBackend.h" 21 #include <algorithm> 22 using namespace llvm; 23 24 namespace { 25 class IntrinsicEmitter { 26 RecordKeeper &Records; 27 bool TargetOnly; 28 std::string TargetPrefix; 29 30 public: 31 IntrinsicEmitter(RecordKeeper &R, bool T) 32 : Records(R), TargetOnly(T) {} 33 34 void run(raw_ostream &OS); 35 36 void EmitPrefix(raw_ostream &OS); 37 38 void EmitEnumInfo(const std::vector<CodeGenIntrinsic> &Ints, 39 raw_ostream &OS); 40 41 void EmitFnNameRecognizer(const std::vector<CodeGenIntrinsic> &Ints, 42 raw_ostream &OS); 43 void EmitIntrinsicToNameTable(const std::vector<CodeGenIntrinsic> &Ints, 44 raw_ostream &OS); 45 void EmitIntrinsicToOverloadTable(const std::vector<CodeGenIntrinsic> &Ints, 46 raw_ostream &OS); 47 void EmitVerifier(const std::vector<CodeGenIntrinsic> &Ints, 48 raw_ostream &OS); 49 void EmitGenerator(const std::vector<CodeGenIntrinsic> &Ints, 50 raw_ostream &OS); 51 void EmitAttributes(const std::vector<CodeGenIntrinsic> &Ints, 52 raw_ostream &OS); 53 void EmitModRefBehavior(const std::vector<CodeGenIntrinsic> &Ints, 54 raw_ostream &OS); 55 void EmitIntrinsicToGCCBuiltinMap(const std::vector<CodeGenIntrinsic> &Ints, 56 raw_ostream &OS); 57 void EmitSuffix(raw_ostream &OS); 58 }; 59 } // End anonymous namespace 60 61 //===----------------------------------------------------------------------===// 62 // IntrinsicEmitter Implementation 63 //===----------------------------------------------------------------------===// 64 65 void IntrinsicEmitter::run(raw_ostream &OS) { 66 emitSourceFileHeader("Intrinsic Function Source Fragment", OS); 67 68 std::vector<CodeGenIntrinsic> Ints = LoadIntrinsics(Records, TargetOnly); 69 70 if (TargetOnly && !Ints.empty()) 71 TargetPrefix = Ints[0].TargetPrefix; 72 73 EmitPrefix(OS); 74 75 // Emit the enum information. 76 EmitEnumInfo(Ints, OS); 77 78 // Emit the intrinsic ID -> name table. 79 EmitIntrinsicToNameTable(Ints, OS); 80 81 // Emit the intrinsic ID -> overload table. 82 EmitIntrinsicToOverloadTable(Ints, OS); 83 84 // Emit the function name recognizer. 85 EmitFnNameRecognizer(Ints, OS); 86 87 // Emit the intrinsic declaration generator. 88 EmitGenerator(Ints, OS); 89 90 // Emit the intrinsic parameter attributes. 91 EmitAttributes(Ints, OS); 92 93 // Emit intrinsic alias analysis mod/ref behavior. 94 EmitModRefBehavior(Ints, OS); 95 96 // Emit code to translate GCC builtins into LLVM intrinsics. 97 EmitIntrinsicToGCCBuiltinMap(Ints, OS); 98 99 EmitSuffix(OS); 100 } 101 102 void IntrinsicEmitter::EmitPrefix(raw_ostream &OS) { 103 OS << "// VisualStudio defines setjmp as _setjmp\n" 104 "#if defined(_MSC_VER) && defined(setjmp) && \\\n" 105 " !defined(setjmp_undefined_for_msvc)\n" 106 "# pragma push_macro(\"setjmp\")\n" 107 "# undef setjmp\n" 108 "# define setjmp_undefined_for_msvc\n" 109 "#endif\n\n"; 110 } 111 112 void IntrinsicEmitter::EmitSuffix(raw_ostream &OS) { 113 OS << "#if defined(_MSC_VER) && defined(setjmp_undefined_for_msvc)\n" 114 "// let's return it to _setjmp state\n" 115 "# pragma pop_macro(\"setjmp\")\n" 116 "# undef setjmp_undefined_for_msvc\n" 117 "#endif\n\n"; 118 } 119 120 void IntrinsicEmitter::EmitEnumInfo(const std::vector<CodeGenIntrinsic> &Ints, 121 raw_ostream &OS) { 122 OS << "// Enum values for Intrinsics.h\n"; 123 OS << "#ifdef GET_INTRINSIC_ENUM_VALUES\n"; 124 for (unsigned i = 0, e = Ints.size(); i != e; ++i) { 125 OS << " " << Ints[i].EnumName; 126 OS << ((i != e-1) ? ", " : " "); 127 OS << std::string(40-Ints[i].EnumName.size(), ' ') 128 << "// " << Ints[i].Name << "\n"; 129 } 130 OS << "#endif\n\n"; 131 } 132 133 void IntrinsicEmitter:: 134 EmitFnNameRecognizer(const std::vector<CodeGenIntrinsic> &Ints, 135 raw_ostream &OS) { 136 // Build a 'first character of function name' -> intrinsic # mapping. 137 std::map<char, std::vector<unsigned> > IntMapping; 138 for (unsigned i = 0, e = Ints.size(); i != e; ++i) 139 IntMapping[Ints[i].Name[5]].push_back(i); 140 141 OS << "// Function name -> enum value recognizer code.\n"; 142 OS << "#ifdef GET_FUNCTION_RECOGNIZER\n"; 143 OS << " StringRef NameR(Name+6, Len-6); // Skip over 'llvm.'\n"; 144 OS << " switch (Name[5]) { // Dispatch on first letter.\n"; 145 OS << " default: break;\n"; 146 // Emit the intrinsic matching stuff by first letter. 147 for (std::map<char, std::vector<unsigned> >::iterator I = IntMapping.begin(), 148 E = IntMapping.end(); I != E; ++I) { 149 OS << " case '" << I->first << "':\n"; 150 std::vector<unsigned> &IntList = I->second; 151 152 // Emit all the overloaded intrinsics first, build a table of the 153 // non-overloaded ones. 154 std::vector<StringMatcher::StringPair> MatchTable; 155 156 for (unsigned i = 0, e = IntList.size(); i != e; ++i) { 157 unsigned IntNo = IntList[i]; 158 std::string Result = "return " + TargetPrefix + "Intrinsic::" + 159 Ints[IntNo].EnumName + ";"; 160 161 if (!Ints[IntNo].isOverloaded) { 162 MatchTable.push_back(std::make_pair(Ints[IntNo].Name.substr(6),Result)); 163 continue; 164 } 165 166 // For overloaded intrinsics, only the prefix needs to match 167 std::string TheStr = Ints[IntNo].Name.substr(6); 168 TheStr += '.'; // Require "bswap." instead of bswap. 169 OS << " if (NameR.startswith(\"" << TheStr << "\")) " 170 << Result << '\n'; 171 } 172 173 // Emit the matcher logic for the fixed length strings. 174 StringMatcher("NameR", MatchTable, OS).Emit(1); 175 OS << " break; // end of '" << I->first << "' case.\n"; 176 } 177 178 OS << " }\n"; 179 OS << "#endif\n\n"; 180 } 181 182 void IntrinsicEmitter:: 183 EmitIntrinsicToNameTable(const std::vector<CodeGenIntrinsic> &Ints, 184 raw_ostream &OS) { 185 OS << "// Intrinsic ID to name table\n"; 186 OS << "#ifdef GET_INTRINSIC_NAME_TABLE\n"; 187 OS << " // Note that entry #0 is the invalid intrinsic!\n"; 188 for (unsigned i = 0, e = Ints.size(); i != e; ++i) 189 OS << " \"" << Ints[i].Name << "\",\n"; 190 OS << "#endif\n\n"; 191 } 192 193 void IntrinsicEmitter:: 194 EmitIntrinsicToOverloadTable(const std::vector<CodeGenIntrinsic> &Ints, 195 raw_ostream &OS) { 196 OS << "// Intrinsic ID to overload bitset\n"; 197 OS << "#ifdef GET_INTRINSIC_OVERLOAD_TABLE\n"; 198 OS << "static const uint8_t OTable[] = {\n"; 199 OS << " 0"; 200 for (unsigned i = 0, e = Ints.size(); i != e; ++i) { 201 // Add one to the index so we emit a null bit for the invalid #0 intrinsic. 202 if ((i+1)%8 == 0) 203 OS << ",\n 0"; 204 if (Ints[i].isOverloaded) 205 OS << " | (1<<" << (i+1)%8 << ')'; 206 } 207 OS << "\n};\n\n"; 208 // OTable contains a true bit at the position if the intrinsic is overloaded. 209 OS << "return (OTable[id/8] & (1 << (id%8))) != 0;\n"; 210 OS << "#endif\n\n"; 211 } 212 213 214 // NOTE: This must be kept in synch with the copy in lib/VMCore/Function.cpp! 215 enum IIT_Info { 216 // Common values should be encoded with 0-15. 217 IIT_Done = 0, 218 IIT_I1 = 1, 219 IIT_I8 = 2, 220 IIT_I16 = 3, 221 IIT_I32 = 4, 222 IIT_I64 = 5, 223 IIT_F32 = 6, 224 IIT_F64 = 7, 225 IIT_V2 = 8, 226 IIT_V4 = 9, 227 IIT_V8 = 10, 228 IIT_V16 = 11, 229 IIT_V32 = 12, 230 IIT_MMX = 13, 231 IIT_PTR = 14, 232 IIT_ARG = 15, 233 234 // Values from 16+ are only encodable with the inefficient encoding. 235 IIT_METADATA = 16, 236 IIT_EMPTYSTRUCT = 17, 237 IIT_STRUCT2 = 18, 238 IIT_STRUCT3 = 19, 239 IIT_STRUCT4 = 20, 240 IIT_STRUCT5 = 21, 241 IIT_EXTEND_VEC_ARG = 22, 242 IIT_TRUNC_VEC_ARG = 23, 243 IIT_ANYPTR = 24 244 }; 245 246 247 static void EncodeFixedValueType(MVT::SimpleValueType VT, 248 std::vector<unsigned char> &Sig) { 249 if (EVT(VT).isInteger()) { 250 unsigned BitWidth = EVT(VT).getSizeInBits(); 251 switch (BitWidth) { 252 default: throw "unhandled integer type width in intrinsic!"; 253 case 1: return Sig.push_back(IIT_I1); 254 case 8: return Sig.push_back(IIT_I8); 255 case 16: return Sig.push_back(IIT_I16); 256 case 32: return Sig.push_back(IIT_I32); 257 case 64: return Sig.push_back(IIT_I64); 258 } 259 } 260 261 switch (VT) { 262 default: throw "unhandled MVT in intrinsic!"; 263 case MVT::f32: return Sig.push_back(IIT_F32); 264 case MVT::f64: return Sig.push_back(IIT_F64); 265 case MVT::Metadata: return Sig.push_back(IIT_METADATA); 266 case MVT::x86mmx: return Sig.push_back(IIT_MMX); 267 // MVT::OtherVT is used to mean the empty struct type here. 268 case MVT::Other: return Sig.push_back(IIT_EMPTYSTRUCT); 269 } 270 } 271 272 #ifdef _MSC_VER 273 #pragma optimize("",off) // MSVC 2010 optimizer can't deal with this function. 274 #endif 275 276 static void EncodeFixedType(Record *R, std::vector<unsigned char> &ArgCodes, 277 std::vector<unsigned char> &Sig) { 278 279 if (R->isSubClassOf("LLVMMatchType")) { 280 unsigned Number = R->getValueAsInt("Number"); 281 assert(Number < ArgCodes.size() && "Invalid matching number!"); 282 if (R->isSubClassOf("LLVMExtendedElementVectorType")) 283 Sig.push_back(IIT_EXTEND_VEC_ARG); 284 else if (R->isSubClassOf("LLVMTruncatedElementVectorType")) 285 Sig.push_back(IIT_TRUNC_VEC_ARG); 286 else 287 Sig.push_back(IIT_ARG); 288 return Sig.push_back((Number << 2) | ArgCodes[Number]); 289 } 290 291 MVT::SimpleValueType VT = getValueType(R->getValueAsDef("VT")); 292 293 unsigned Tmp = 0; 294 switch (VT) { 295 default: break; 296 case MVT::iPTRAny: ++Tmp; // FALL THROUGH. 297 case MVT::vAny: ++Tmp; // FALL THROUGH. 298 case MVT::fAny: ++Tmp; // FALL THROUGH. 299 case MVT::iAny: { 300 // If this is an "any" valuetype, then the type is the type of the next 301 // type in the list specified to getIntrinsic(). 302 Sig.push_back(IIT_ARG); 303 304 // Figure out what arg # this is consuming, and remember what kind it was. 305 unsigned ArgNo = ArgCodes.size(); 306 ArgCodes.push_back(Tmp); 307 308 // Encode what sort of argument it must be in the low 2 bits of the ArgNo. 309 return Sig.push_back((ArgNo << 2) | Tmp); 310 } 311 312 case MVT::iPTR: { 313 unsigned AddrSpace = 0; 314 if (R->isSubClassOf("LLVMQualPointerType")) { 315 AddrSpace = R->getValueAsInt("AddrSpace"); 316 assert(AddrSpace < 256 && "Address space exceeds 255"); 317 } 318 if (AddrSpace) { 319 Sig.push_back(IIT_ANYPTR); 320 Sig.push_back(AddrSpace); 321 } else { 322 Sig.push_back(IIT_PTR); 323 } 324 return EncodeFixedType(R->getValueAsDef("ElTy"), ArgCodes, Sig); 325 } 326 } 327 328 if (EVT(VT).isVector()) { 329 EVT VVT = VT; 330 switch (VVT.getVectorNumElements()) { 331 default: throw "unhandled vector type width in intrinsic!"; 332 case 2: Sig.push_back(IIT_V2); break; 333 case 4: Sig.push_back(IIT_V4); break; 334 case 8: Sig.push_back(IIT_V8); break; 335 case 16: Sig.push_back(IIT_V16); break; 336 case 32: Sig.push_back(IIT_V32); break; 337 } 338 339 return EncodeFixedValueType(VVT.getVectorElementType(). 340 getSimpleVT().SimpleTy, Sig); 341 } 342 343 EncodeFixedValueType(VT, Sig); 344 } 345 346 #ifdef _MSC_VER 347 #pragma optimize("",on) 348 #endif 349 350 /// ComputeFixedEncoding - If we can encode the type signature for this 351 /// intrinsic into 32 bits, return it. If not, return ~0U. 352 static void ComputeFixedEncoding(const CodeGenIntrinsic &Int, 353 std::vector<unsigned char> &TypeSig) { 354 std::vector<unsigned char> ArgCodes; 355 356 if (Int.IS.RetVTs.empty()) 357 TypeSig.push_back(IIT_Done); 358 else if (Int.IS.RetVTs.size() == 1 && 359 Int.IS.RetVTs[0] == MVT::isVoid) 360 TypeSig.push_back(IIT_Done); 361 else { 362 switch (Int.IS.RetVTs.size()) { 363 case 1: break; 364 case 2: TypeSig.push_back(IIT_STRUCT2); break; 365 case 3: TypeSig.push_back(IIT_STRUCT3); break; 366 case 4: TypeSig.push_back(IIT_STRUCT4); break; 367 case 5: TypeSig.push_back(IIT_STRUCT5); break; 368 default: assert(0 && "Unhandled case in struct"); 369 } 370 371 for (unsigned i = 0, e = Int.IS.RetVTs.size(); i != e; ++i) 372 EncodeFixedType(Int.IS.RetTypeDefs[i], ArgCodes, TypeSig); 373 } 374 375 for (unsigned i = 0, e = Int.IS.ParamTypeDefs.size(); i != e; ++i) 376 EncodeFixedType(Int.IS.ParamTypeDefs[i], ArgCodes, TypeSig); 377 } 378 379 static void printIITEntry(raw_ostream &OS, unsigned char X) { 380 OS << (unsigned)X; 381 } 382 383 void IntrinsicEmitter::EmitGenerator(const std::vector<CodeGenIntrinsic> &Ints, 384 raw_ostream &OS) { 385 // If we can compute a 32-bit fixed encoding for this intrinsic, do so and 386 // capture it in this vector, otherwise store a ~0U. 387 std::vector<unsigned> FixedEncodings; 388 389 SequenceToOffsetTable<std::vector<unsigned char> > LongEncodingTable; 390 391 std::vector<unsigned char> TypeSig; 392 393 // Compute the unique argument type info. 394 for (unsigned i = 0, e = Ints.size(); i != e; ++i) { 395 // Get the signature for the intrinsic. 396 TypeSig.clear(); 397 ComputeFixedEncoding(Ints[i], TypeSig); 398 399 // Check to see if we can encode it into a 32-bit word. We can only encode 400 // 8 nibbles into a 32-bit word. 401 if (TypeSig.size() <= 8) { 402 bool Failed = false; 403 unsigned Result = 0; 404 for (unsigned i = 0, e = TypeSig.size(); i != e; ++i) { 405 // If we had an unencodable argument, bail out. 406 if (TypeSig[i] > 15) { 407 Failed = true; 408 break; 409 } 410 Result = (Result << 4) | TypeSig[e-i-1]; 411 } 412 413 // If this could be encoded into a 31-bit word, return it. 414 if (!Failed && (Result >> 31) == 0) { 415 FixedEncodings.push_back(Result); 416 continue; 417 } 418 } 419 420 // Otherwise, we're going to unique the sequence into the 421 // LongEncodingTable, and use its offset in the 32-bit table instead. 422 LongEncodingTable.add(TypeSig); 423 424 // This is a placehold that we'll replace after the table is laid out. 425 FixedEncodings.push_back(~0U); 426 } 427 428 LongEncodingTable.layout(); 429 430 OS << "// Global intrinsic function declaration type table.\n"; 431 OS << "#ifdef GET_INTRINSIC_GENERATOR_GLOBAL\n"; 432 433 OS << "static const unsigned IIT_Table[] = {\n "; 434 435 for (unsigned i = 0, e = FixedEncodings.size(); i != e; ++i) { 436 if ((i & 7) == 7) 437 OS << "\n "; 438 439 // If the entry fit in the table, just emit it. 440 if (FixedEncodings[i] != ~0U) { 441 OS << "0x" << utohexstr(FixedEncodings[i]) << ", "; 442 continue; 443 } 444 445 TypeSig.clear(); 446 ComputeFixedEncoding(Ints[i], TypeSig); 447 448 449 // Otherwise, emit the offset into the long encoding table. We emit it this 450 // way so that it is easier to read the offset in the .def file. 451 OS << "(1U<<31) | " << LongEncodingTable.get(TypeSig) << ", "; 452 } 453 454 OS << "0\n};\n\n"; 455 456 // Emit the shared table of register lists. 457 OS << "static const unsigned char IIT_LongEncodingTable[] = {\n"; 458 if (!LongEncodingTable.empty()) 459 LongEncodingTable.emit(OS, printIITEntry); 460 OS << " 255\n};\n\n"; 461 462 OS << "#endif\n\n"; // End of GET_INTRINSIC_GENERATOR_GLOBAL 463 } 464 465 enum ModRefKind { 466 MRK_none, 467 MRK_readonly, 468 MRK_readnone 469 }; 470 471 static ModRefKind getModRefKind(const CodeGenIntrinsic &intrinsic) { 472 switch (intrinsic.ModRef) { 473 case CodeGenIntrinsic::NoMem: 474 return MRK_readnone; 475 case CodeGenIntrinsic::ReadArgMem: 476 case CodeGenIntrinsic::ReadMem: 477 return MRK_readonly; 478 case CodeGenIntrinsic::ReadWriteArgMem: 479 case CodeGenIntrinsic::ReadWriteMem: 480 return MRK_none; 481 } 482 llvm_unreachable("bad mod-ref kind"); 483 } 484 485 namespace { 486 struct AttributeComparator { 487 bool operator()(const CodeGenIntrinsic *L, const CodeGenIntrinsic *R) const { 488 // Sort throwing intrinsics after non-throwing intrinsics. 489 if (L->canThrow != R->canThrow) 490 return R->canThrow; 491 492 if (L->isNoReturn != R->isNoReturn) 493 return R->isNoReturn; 494 495 // Try to order by readonly/readnone attribute. 496 ModRefKind LK = getModRefKind(*L); 497 ModRefKind RK = getModRefKind(*R); 498 if (LK != RK) return (LK > RK); 499 500 // Order by argument attributes. 501 // This is reliable because each side is already sorted internally. 502 return (L->ArgumentAttributes < R->ArgumentAttributes); 503 } 504 }; 505 } // End anonymous namespace 506 507 /// EmitAttributes - This emits the Intrinsic::getAttributes method. 508 void IntrinsicEmitter:: 509 EmitAttributes(const std::vector<CodeGenIntrinsic> &Ints, raw_ostream &OS) { 510 OS << "// Add parameter attributes that are not common to all intrinsics.\n"; 511 OS << "#ifdef GET_INTRINSIC_ATTRIBUTES\n"; 512 if (TargetOnly) 513 OS << "static AttrListPtr getAttributes(" << TargetPrefix 514 << "Intrinsic::ID id) {\n"; 515 else 516 OS << "AttrListPtr Intrinsic::getAttributes(ID id) {\n"; 517 518 // Compute the maximum number of attribute arguments and the map 519 typedef std::map<const CodeGenIntrinsic*, unsigned, 520 AttributeComparator> UniqAttrMapTy; 521 UniqAttrMapTy UniqAttributes; 522 unsigned maxArgAttrs = 0; 523 unsigned AttrNum = 0; 524 for (unsigned i = 0, e = Ints.size(); i != e; ++i) { 525 const CodeGenIntrinsic &intrinsic = Ints[i]; 526 maxArgAttrs = 527 std::max(maxArgAttrs, unsigned(intrinsic.ArgumentAttributes.size())); 528 unsigned &N = UniqAttributes[&intrinsic]; 529 if (N) continue; 530 assert(AttrNum < 256 && "Too many unique attributes for table!"); 531 N = ++AttrNum; 532 } 533 534 // Emit an array of AttributeWithIndex. Most intrinsics will have 535 // at least one entry, for the function itself (index ~1), which is 536 // usually nounwind. 537 OS << " static const uint8_t IntrinsicsToAttributesMap[] = {\n"; 538 539 for (unsigned i = 0, e = Ints.size(); i != e; ++i) { 540 const CodeGenIntrinsic &intrinsic = Ints[i]; 541 542 OS << " " << UniqAttributes[&intrinsic] << ", // " 543 << intrinsic.Name << "\n"; 544 } 545 OS << " };\n\n"; 546 547 OS << " AttributeWithIndex AWI[" << maxArgAttrs+1 << "];\n"; 548 OS << " unsigned NumAttrs = 0;\n"; 549 OS << " if (id != 0) {\n"; 550 OS << " switch(IntrinsicsToAttributesMap[id - "; 551 if (TargetOnly) 552 OS << "Intrinsic::num_intrinsics"; 553 else 554 OS << "1"; 555 OS << "]) {\n"; 556 OS << " default: llvm_unreachable(\"Invalid attribute number\");\n"; 557 for (UniqAttrMapTy::const_iterator I = UniqAttributes.begin(), 558 E = UniqAttributes.end(); I != E; ++I) { 559 OS << " case " << I->second << ":\n"; 560 561 const CodeGenIntrinsic &intrinsic = *(I->first); 562 563 // Keep track of the number of attributes we're writing out. 564 unsigned numAttrs = 0; 565 566 // The argument attributes are alreadys sorted by argument index. 567 for (unsigned ai = 0, ae = intrinsic.ArgumentAttributes.size(); ai != ae;) { 568 unsigned argNo = intrinsic.ArgumentAttributes[ai].first; 569 570 OS << " AWI[" << numAttrs++ << "] = AttributeWithIndex::get(" 571 << argNo+1 << ", "; 572 573 bool moreThanOne = false; 574 575 do { 576 if (moreThanOne) OS << '|'; 577 578 switch (intrinsic.ArgumentAttributes[ai].second) { 579 case CodeGenIntrinsic::NoCapture: 580 OS << "Attribute::NoCapture"; 581 break; 582 } 583 584 ++ai; 585 moreThanOne = true; 586 } while (ai != ae && intrinsic.ArgumentAttributes[ai].first == argNo); 587 588 OS << ");\n"; 589 } 590 591 ModRefKind modRef = getModRefKind(intrinsic); 592 593 if (!intrinsic.canThrow || modRef || intrinsic.isNoReturn) { 594 OS << " AWI[" << numAttrs++ << "] = AttributeWithIndex::get(~0, "; 595 bool Emitted = false; 596 if (!intrinsic.canThrow) { 597 OS << "Attribute::NoUnwind"; 598 Emitted = true; 599 } 600 601 if (intrinsic.isNoReturn) { 602 if (Emitted) OS << '|'; 603 OS << "Attribute::NoReturn"; 604 Emitted = true; 605 } 606 607 switch (modRef) { 608 case MRK_none: break; 609 case MRK_readonly: 610 if (Emitted) OS << '|'; 611 OS << "Attribute::ReadOnly"; 612 break; 613 case MRK_readnone: 614 if (Emitted) OS << '|'; 615 OS << "Attribute::ReadNone"; 616 break; 617 } 618 OS << ");\n"; 619 } 620 621 if (numAttrs) { 622 OS << " NumAttrs = " << numAttrs << ";\n"; 623 OS << " break;\n"; 624 } else { 625 OS << " return AttrListPtr();\n"; 626 } 627 } 628 629 OS << " }\n"; 630 OS << " }\n"; 631 OS << " return AttrListPtr::get(ArrayRef<AttributeWithIndex>(AWI, " 632 "NumAttrs));\n"; 633 OS << "}\n"; 634 OS << "#endif // GET_INTRINSIC_ATTRIBUTES\n\n"; 635 } 636 637 /// EmitModRefBehavior - Determine intrinsic alias analysis mod/ref behavior. 638 void IntrinsicEmitter:: 639 EmitModRefBehavior(const std::vector<CodeGenIntrinsic> &Ints, raw_ostream &OS){ 640 OS << "// Determine intrinsic alias analysis mod/ref behavior.\n" 641 << "#ifdef GET_INTRINSIC_MODREF_BEHAVIOR\n" 642 << "assert(iid <= Intrinsic::" << Ints.back().EnumName << " && " 643 << "\"Unknown intrinsic.\");\n\n"; 644 645 OS << "static const uint8_t IntrinsicModRefBehavior[] = {\n" 646 << " /* invalid */ UnknownModRefBehavior,\n"; 647 for (unsigned i = 0, e = Ints.size(); i != e; ++i) { 648 OS << " /* " << TargetPrefix << Ints[i].EnumName << " */ "; 649 switch (Ints[i].ModRef) { 650 case CodeGenIntrinsic::NoMem: 651 OS << "DoesNotAccessMemory,\n"; 652 break; 653 case CodeGenIntrinsic::ReadArgMem: 654 OS << "OnlyReadsArgumentPointees,\n"; 655 break; 656 case CodeGenIntrinsic::ReadMem: 657 OS << "OnlyReadsMemory,\n"; 658 break; 659 case CodeGenIntrinsic::ReadWriteArgMem: 660 OS << "OnlyAccessesArgumentPointees,\n"; 661 break; 662 case CodeGenIntrinsic::ReadWriteMem: 663 OS << "UnknownModRefBehavior,\n"; 664 break; 665 } 666 } 667 OS << "};\n\n" 668 << "return static_cast<ModRefBehavior>(IntrinsicModRefBehavior[iid]);\n" 669 << "#endif // GET_INTRINSIC_MODREF_BEHAVIOR\n\n"; 670 } 671 672 /// EmitTargetBuiltins - All of the builtins in the specified map are for the 673 /// same target, and we already checked it. 674 static void EmitTargetBuiltins(const std::map<std::string, std::string> &BIM, 675 const std::string &TargetPrefix, 676 raw_ostream &OS) { 677 678 std::vector<StringMatcher::StringPair> Results; 679 680 for (std::map<std::string, std::string>::const_iterator I = BIM.begin(), 681 E = BIM.end(); I != E; ++I) { 682 std::string ResultCode = 683 "return " + TargetPrefix + "Intrinsic::" + I->second + ";"; 684 Results.push_back(StringMatcher::StringPair(I->first, ResultCode)); 685 } 686 687 StringMatcher("BuiltinName", Results, OS).Emit(); 688 } 689 690 691 void IntrinsicEmitter:: 692 EmitIntrinsicToGCCBuiltinMap(const std::vector<CodeGenIntrinsic> &Ints, 693 raw_ostream &OS) { 694 typedef std::map<std::string, std::map<std::string, std::string> > BIMTy; 695 BIMTy BuiltinMap; 696 for (unsigned i = 0, e = Ints.size(); i != e; ++i) { 697 if (!Ints[i].GCCBuiltinName.empty()) { 698 // Get the map for this target prefix. 699 std::map<std::string, std::string> &BIM =BuiltinMap[Ints[i].TargetPrefix]; 700 701 if (!BIM.insert(std::make_pair(Ints[i].GCCBuiltinName, 702 Ints[i].EnumName)).second) 703 throw "Intrinsic '" + Ints[i].TheDef->getName() + 704 "': duplicate GCC builtin name!"; 705 } 706 } 707 708 OS << "// Get the LLVM intrinsic that corresponds to a GCC builtin.\n"; 709 OS << "// This is used by the C front-end. The GCC builtin name is passed\n"; 710 OS << "// in as BuiltinName, and a target prefix (e.g. 'ppc') is passed\n"; 711 OS << "// in as TargetPrefix. The result is assigned to 'IntrinsicID'.\n"; 712 OS << "#ifdef GET_LLVM_INTRINSIC_FOR_GCC_BUILTIN\n"; 713 714 if (TargetOnly) { 715 OS << "static " << TargetPrefix << "Intrinsic::ID " 716 << "getIntrinsicForGCCBuiltin(const char " 717 << "*TargetPrefixStr, const char *BuiltinNameStr) {\n"; 718 } else { 719 OS << "Intrinsic::ID Intrinsic::getIntrinsicForGCCBuiltin(const char " 720 << "*TargetPrefixStr, const char *BuiltinNameStr) {\n"; 721 } 722 723 OS << " StringRef BuiltinName(BuiltinNameStr);\n"; 724 OS << " StringRef TargetPrefix(TargetPrefixStr);\n\n"; 725 726 // Note: this could emit significantly better code if we cared. 727 for (BIMTy::iterator I = BuiltinMap.begin(), E = BuiltinMap.end();I != E;++I){ 728 OS << " "; 729 if (!I->first.empty()) 730 OS << "if (TargetPrefix == \"" << I->first << "\") "; 731 else 732 OS << "/* Target Independent Builtins */ "; 733 OS << "{\n"; 734 735 // Emit the comparisons for this target prefix. 736 EmitTargetBuiltins(I->second, TargetPrefix, OS); 737 OS << " }\n"; 738 } 739 OS << " return "; 740 if (!TargetPrefix.empty()) 741 OS << "(" << TargetPrefix << "Intrinsic::ID)"; 742 OS << "Intrinsic::not_intrinsic;\n"; 743 OS << "}\n"; 744 OS << "#endif\n\n"; 745 } 746 747 namespace llvm { 748 749 void EmitIntrinsics(RecordKeeper &RK, raw_ostream &OS, bool TargetOnly = false) { 750 IntrinsicEmitter(RK, TargetOnly).run(OS); 751 } 752 753 } // End llvm namespace 754