1 //===--- Bitcode/Writer/BitcodeWriter.cpp - Bitcode Writer ----------------===// 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 // Bitcode writer implementation. 11 // 12 //===----------------------------------------------------------------------===// 13 14 #include "ReaderWriter_2_9_func.h" 15 #include "ValueEnumerator.h" 16 #include "llvm/ADT/Triple.h" 17 #include "llvm/Bitcode/BitstreamWriter.h" 18 #include "llvm/Bitcode/LLVMBitCodes.h" 19 #include "llvm/IR/Constants.h" 20 #include "llvm/IR/DerivedTypes.h" 21 #include "llvm/IR/InlineAsm.h" 22 #include "llvm/IR/Instructions.h" 23 #include "llvm/IR/Module.h" 24 #include "llvm/IR/Operator.h" 25 #include "llvm/IR/ValueSymbolTable.h" 26 #include "llvm/Support/ErrorHandling.h" 27 #include "llvm/Support/MathExtras.h" 28 #include "llvm/Support/Program.h" 29 #include "llvm/Support/raw_ostream.h" 30 #include <cctype> 31 #include <map> 32 using namespace llvm; 33 34 /// These are manifest constants used by the bitcode writer. They do not need to 35 /// be kept in sync with the reader, but need to be consistent within this file. 36 enum { 37 CurVersion = 0, 38 39 // VALUE_SYMTAB_BLOCK abbrev id's. 40 VST_ENTRY_8_ABBREV = bitc::FIRST_APPLICATION_ABBREV, 41 VST_ENTRY_7_ABBREV, 42 VST_ENTRY_6_ABBREV, 43 VST_BBENTRY_6_ABBREV, 44 45 // CONSTANTS_BLOCK abbrev id's. 46 CONSTANTS_SETTYPE_ABBREV = bitc::FIRST_APPLICATION_ABBREV, 47 CONSTANTS_INTEGER_ABBREV, 48 CONSTANTS_CE_CAST_Abbrev, 49 CONSTANTS_NULL_Abbrev, 50 51 // FUNCTION_BLOCK abbrev id's. 52 FUNCTION_INST_LOAD_ABBREV = bitc::FIRST_APPLICATION_ABBREV, 53 FUNCTION_INST_BINOP_ABBREV, 54 FUNCTION_INST_BINOP_FLAGS_ABBREV, 55 FUNCTION_INST_CAST_ABBREV, 56 FUNCTION_INST_RET_VOID_ABBREV, 57 FUNCTION_INST_RET_VAL_ABBREV, 58 FUNCTION_INST_UNREACHABLE_ABBREV 59 }; 60 61 62 static unsigned GetEncodedCastOpcode(unsigned Opcode) { 63 switch (Opcode) { 64 default: llvm_unreachable("Unknown cast instruction!"); 65 case Instruction::Trunc : return bitc::CAST_TRUNC; 66 case Instruction::ZExt : return bitc::CAST_ZEXT; 67 case Instruction::SExt : return bitc::CAST_SEXT; 68 case Instruction::FPToUI : return bitc::CAST_FPTOUI; 69 case Instruction::FPToSI : return bitc::CAST_FPTOSI; 70 case Instruction::UIToFP : return bitc::CAST_UITOFP; 71 case Instruction::SIToFP : return bitc::CAST_SITOFP; 72 case Instruction::FPTrunc : return bitc::CAST_FPTRUNC; 73 case Instruction::FPExt : return bitc::CAST_FPEXT; 74 case Instruction::PtrToInt: return bitc::CAST_PTRTOINT; 75 case Instruction::IntToPtr: return bitc::CAST_INTTOPTR; 76 case Instruction::BitCast : return bitc::CAST_BITCAST; 77 } 78 } 79 80 static unsigned GetEncodedBinaryOpcode(unsigned Opcode) { 81 switch (Opcode) { 82 default: llvm_unreachable("Unknown binary instruction!"); 83 case Instruction::Add: 84 case Instruction::FAdd: return bitc::BINOP_ADD; 85 case Instruction::Sub: 86 case Instruction::FSub: return bitc::BINOP_SUB; 87 case Instruction::Mul: 88 case Instruction::FMul: return bitc::BINOP_MUL; 89 case Instruction::UDiv: return bitc::BINOP_UDIV; 90 case Instruction::FDiv: 91 case Instruction::SDiv: return bitc::BINOP_SDIV; 92 case Instruction::URem: return bitc::BINOP_UREM; 93 case Instruction::FRem: 94 case Instruction::SRem: return bitc::BINOP_SREM; 95 case Instruction::Shl: return bitc::BINOP_SHL; 96 case Instruction::LShr: return bitc::BINOP_LSHR; 97 case Instruction::AShr: return bitc::BINOP_ASHR; 98 case Instruction::And: return bitc::BINOP_AND; 99 case Instruction::Or: return bitc::BINOP_OR; 100 case Instruction::Xor: return bitc::BINOP_XOR; 101 } 102 } 103 104 static unsigned GetEncodedRMWOperation(AtomicRMWInst::BinOp Op) { 105 switch (Op) { 106 default: llvm_unreachable("Unknown RMW operation!"); 107 case AtomicRMWInst::Xchg: return bitc::RMW_XCHG; 108 case AtomicRMWInst::Add: return bitc::RMW_ADD; 109 case AtomicRMWInst::Sub: return bitc::RMW_SUB; 110 case AtomicRMWInst::And: return bitc::RMW_AND; 111 case AtomicRMWInst::Nand: return bitc::RMW_NAND; 112 case AtomicRMWInst::Or: return bitc::RMW_OR; 113 case AtomicRMWInst::Xor: return bitc::RMW_XOR; 114 case AtomicRMWInst::Max: return bitc::RMW_MAX; 115 case AtomicRMWInst::Min: return bitc::RMW_MIN; 116 case AtomicRMWInst::UMax: return bitc::RMW_UMAX; 117 case AtomicRMWInst::UMin: return bitc::RMW_UMIN; 118 } 119 } 120 121 static unsigned GetEncodedOrdering(AtomicOrdering Ordering) { 122 switch (Ordering) { 123 default: llvm_unreachable("Unknown atomic ordering"); 124 case NotAtomic: return bitc::ORDERING_NOTATOMIC; 125 case Unordered: return bitc::ORDERING_UNORDERED; 126 case Monotonic: return bitc::ORDERING_MONOTONIC; 127 case Acquire: return bitc::ORDERING_ACQUIRE; 128 case Release: return bitc::ORDERING_RELEASE; 129 case AcquireRelease: return bitc::ORDERING_ACQREL; 130 case SequentiallyConsistent: return bitc::ORDERING_SEQCST; 131 } 132 } 133 134 static unsigned GetEncodedSynchScope(SynchronizationScope SynchScope) { 135 switch (SynchScope) { 136 default: llvm_unreachable("Unknown synchronization scope"); 137 case SingleThread: return bitc::SYNCHSCOPE_SINGLETHREAD; 138 case CrossThread: return bitc::SYNCHSCOPE_CROSSTHREAD; 139 } 140 } 141 142 static void WriteStringRecord(unsigned Code, StringRef Str, 143 unsigned AbbrevToUse, BitstreamWriter &Stream) { 144 SmallVector<unsigned, 64> Vals; 145 146 // Code: [strchar x N] 147 for (unsigned i = 0, e = Str.size(); i != e; ++i) { 148 if (AbbrevToUse && !BitCodeAbbrevOp::isChar6(Str[i])) 149 AbbrevToUse = 0; 150 Vals.push_back(Str[i]); 151 } 152 153 // Emit the finished record. 154 Stream.EmitRecord(Code, Vals, AbbrevToUse); 155 } 156 157 // Emit information about parameter attributes. 158 static void WriteAttributeTable(const llvm_2_9_func::ValueEnumerator &VE, 159 BitstreamWriter &Stream) { 160 const std::vector<AttributeSet> &Attrs = VE.getAttributes(); 161 if (Attrs.empty()) return; 162 163 Stream.EnterSubblock(bitc::PARAMATTR_BLOCK_ID, 3); 164 165 SmallVector<uint64_t, 64> Record; 166 for (unsigned i = 0, e = Attrs.size(); i != e; ++i) { 167 const AttributeSet &A = Attrs[i]; 168 for (unsigned i = 0, e = A.getNumSlots(); i != e; ++i) 169 Record.push_back(VE.getAttributeGroupID(A.getSlotAttributes(i))); 170 171 Stream.EmitRecord(bitc::PARAMATTR_CODE_ENTRY, Record); 172 Record.clear(); 173 } 174 175 Stream.ExitBlock(); 176 } 177 178 /// WriteTypeTable - Write out the type table for a module. 179 static void WriteTypeTable(const llvm_2_9_func::ValueEnumerator &VE, 180 BitstreamWriter &Stream) { 181 const llvm_2_9_func::ValueEnumerator::TypeList &TypeList = VE.getTypes(); 182 183 Stream.EnterSubblock(bitc::TYPE_BLOCK_ID_NEW, 4 /*count from # abbrevs */); 184 SmallVector<uint64_t, 64> TypeVals; 185 186 // Abbrev for TYPE_CODE_POINTER. 187 BitCodeAbbrev *Abbv = new BitCodeAbbrev(); 188 Abbv->Add(BitCodeAbbrevOp(bitc::TYPE_CODE_POINTER)); 189 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 190 Log2_32_Ceil(VE.getTypes().size()+1))); 191 Abbv->Add(BitCodeAbbrevOp(0)); // Addrspace = 0 192 unsigned PtrAbbrev = Stream.EmitAbbrev(Abbv); 193 194 // Abbrev for TYPE_CODE_FUNCTION. 195 Abbv = new BitCodeAbbrev(); 196 Abbv->Add(BitCodeAbbrevOp(bitc::TYPE_CODE_FUNCTION_OLD)); 197 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // isvararg 198 Abbv->Add(BitCodeAbbrevOp(0)); // FIXME: DEAD value, remove in LLVM 3.0 199 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array)); 200 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 201 Log2_32_Ceil(VE.getTypes().size()+1))); 202 unsigned FunctionAbbrev = Stream.EmitAbbrev(Abbv); 203 204 // Abbrev for TYPE_CODE_STRUCT_ANON. 205 Abbv = new BitCodeAbbrev(); 206 Abbv->Add(BitCodeAbbrevOp(bitc::TYPE_CODE_STRUCT_ANON)); 207 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // ispacked 208 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array)); 209 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 210 Log2_32_Ceil(VE.getTypes().size()+1))); 211 unsigned StructAnonAbbrev = Stream.EmitAbbrev(Abbv); 212 213 // Abbrev for TYPE_CODE_STRUCT_NAME. 214 Abbv = new BitCodeAbbrev(); 215 Abbv->Add(BitCodeAbbrevOp(bitc::TYPE_CODE_STRUCT_NAME)); 216 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array)); 217 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Char6)); 218 unsigned StructNameAbbrev = Stream.EmitAbbrev(Abbv); 219 220 // Abbrev for TYPE_CODE_STRUCT_NAMED. 221 Abbv = new BitCodeAbbrev(); 222 Abbv->Add(BitCodeAbbrevOp(bitc::TYPE_CODE_STRUCT_NAMED)); 223 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // ispacked 224 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array)); 225 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 226 Log2_32_Ceil(VE.getTypes().size()+1))); 227 unsigned StructNamedAbbrev = Stream.EmitAbbrev(Abbv); 228 229 // Abbrev for TYPE_CODE_ARRAY. 230 Abbv = new BitCodeAbbrev(); 231 Abbv->Add(BitCodeAbbrevOp(bitc::TYPE_CODE_ARRAY)); 232 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8)); // size 233 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 234 Log2_32_Ceil(VE.getTypes().size()+1))); 235 unsigned ArrayAbbrev = Stream.EmitAbbrev(Abbv); 236 237 // Emit an entry count so the reader can reserve space. 238 TypeVals.push_back(TypeList.size()); 239 Stream.EmitRecord(bitc::TYPE_CODE_NUMENTRY, TypeVals); 240 TypeVals.clear(); 241 242 // Loop over all of the types, emitting each in turn. 243 for (unsigned i = 0, e = TypeList.size(); i != e; ++i) { 244 Type *T = TypeList[i]; 245 int AbbrevToUse = 0; 246 unsigned Code = 0; 247 248 switch (T->getTypeID()) { 249 default: llvm_unreachable("Unknown type!"); 250 case Type::VoidTyID: Code = bitc::TYPE_CODE_VOID; break; 251 case Type::FloatTyID: Code = bitc::TYPE_CODE_FLOAT; break; 252 case Type::DoubleTyID: Code = bitc::TYPE_CODE_DOUBLE; break; 253 case Type::X86_FP80TyID: Code = bitc::TYPE_CODE_X86_FP80; break; 254 case Type::FP128TyID: Code = bitc::TYPE_CODE_FP128; break; 255 case Type::PPC_FP128TyID: Code = bitc::TYPE_CODE_PPC_FP128; break; 256 case Type::LabelTyID: Code = bitc::TYPE_CODE_LABEL; break; 257 case Type::MetadataTyID: Code = bitc::TYPE_CODE_METADATA; break; 258 case Type::X86_MMXTyID: Code = bitc::TYPE_CODE_X86_MMX; break; 259 case Type::IntegerTyID: 260 // INTEGER: [width] 261 Code = bitc::TYPE_CODE_INTEGER; 262 TypeVals.push_back(cast<IntegerType>(T)->getBitWidth()); 263 break; 264 case Type::PointerTyID: { 265 PointerType *PTy = cast<PointerType>(T); 266 // POINTER: [pointee type, address space] 267 Code = bitc::TYPE_CODE_POINTER; 268 TypeVals.push_back(VE.getTypeID(PTy->getElementType())); 269 unsigned AddressSpace = PTy->getAddressSpace(); 270 TypeVals.push_back(AddressSpace); 271 if (AddressSpace == 0) AbbrevToUse = PtrAbbrev; 272 break; 273 } 274 case Type::FunctionTyID: { 275 FunctionType *FT = cast<FunctionType>(T); 276 // FUNCTION: [isvararg, attrid, retty, paramty x N] 277 Code = bitc::TYPE_CODE_FUNCTION_OLD; 278 TypeVals.push_back(FT->isVarArg()); 279 TypeVals.push_back(0); // FIXME: DEAD: remove in llvm 3.0 280 TypeVals.push_back(VE.getTypeID(FT->getReturnType())); 281 for (unsigned i = 0, e = FT->getNumParams(); i != e; ++i) 282 TypeVals.push_back(VE.getTypeID(FT->getParamType(i))); 283 AbbrevToUse = FunctionAbbrev; 284 break; 285 } 286 case Type::StructTyID: { 287 StructType *ST = cast<StructType>(T); 288 // STRUCT: [ispacked, eltty x N] 289 TypeVals.push_back(ST->isPacked()); 290 // Output all of the element types. 291 for (StructType::element_iterator I = ST->element_begin(), 292 E = ST->element_end(); I != E; ++I) 293 TypeVals.push_back(VE.getTypeID(*I)); 294 295 if (ST->isLiteral()) { 296 Code = bitc::TYPE_CODE_STRUCT_ANON; 297 AbbrevToUse = StructAnonAbbrev; 298 } else { 299 if (ST->isOpaque()) { 300 Code = bitc::TYPE_CODE_OPAQUE; 301 } else { 302 Code = bitc::TYPE_CODE_STRUCT_NAMED; 303 AbbrevToUse = StructNamedAbbrev; 304 } 305 306 // Emit the name if it is present. 307 if (!ST->getName().empty()) 308 WriteStringRecord(bitc::TYPE_CODE_STRUCT_NAME, ST->getName(), 309 StructNameAbbrev, Stream); 310 } 311 break; 312 } 313 case Type::ArrayTyID: { 314 ArrayType *AT = cast<ArrayType>(T); 315 // ARRAY: [numelts, eltty] 316 Code = bitc::TYPE_CODE_ARRAY; 317 TypeVals.push_back(AT->getNumElements()); 318 TypeVals.push_back(VE.getTypeID(AT->getElementType())); 319 AbbrevToUse = ArrayAbbrev; 320 break; 321 } 322 case Type::VectorTyID: { 323 VectorType *VT = cast<VectorType>(T); 324 // VECTOR [numelts, eltty] 325 Code = bitc::TYPE_CODE_VECTOR; 326 TypeVals.push_back(VT->getNumElements()); 327 TypeVals.push_back(VE.getTypeID(VT->getElementType())); 328 break; 329 } 330 } 331 332 // Emit the finished record. 333 Stream.EmitRecord(Code, TypeVals, AbbrevToUse); 334 TypeVals.clear(); 335 } 336 337 Stream.ExitBlock(); 338 } 339 340 static unsigned getEncodedLinkage(const GlobalValue *GV) { 341 switch (GV->getLinkage()) { 342 case GlobalValue::ExternalLinkage: return 0; 343 case GlobalValue::WeakAnyLinkage: return 1; 344 case GlobalValue::AppendingLinkage: return 2; 345 case GlobalValue::InternalLinkage: return 3; 346 case GlobalValue::LinkOnceAnyLinkage: return 4; 347 case GlobalValue::DLLImportLinkage: return 5; 348 case GlobalValue::DLLExportLinkage: return 6; 349 case GlobalValue::ExternalWeakLinkage: return 7; 350 case GlobalValue::CommonLinkage: return 8; 351 case GlobalValue::PrivateLinkage: return 9; 352 case GlobalValue::WeakODRLinkage: return 10; 353 case GlobalValue::LinkOnceODRLinkage: return 11; 354 case GlobalValue::AvailableExternallyLinkage: return 12; 355 case GlobalValue::LinkerPrivateLinkage: return 13; 356 case GlobalValue::LinkerPrivateWeakLinkage: return 14; 357 case GlobalValue::LinkOnceODRAutoHideLinkage: return 15; 358 } 359 llvm_unreachable("Invalid linkage"); 360 } 361 362 static unsigned getEncodedVisibility(const GlobalValue *GV) { 363 switch (GV->getVisibility()) { 364 default: llvm_unreachable("Invalid visibility!"); 365 case GlobalValue::DefaultVisibility: return 0; 366 case GlobalValue::HiddenVisibility: return 1; 367 case GlobalValue::ProtectedVisibility: return 2; 368 } 369 } 370 371 // Emit top-level description of module, including target triple, inline asm, 372 // descriptors for global variables, and function prototype info. 373 static void WriteModuleInfo(const Module *M, 374 const llvm_2_9_func::ValueEnumerator &VE, 375 BitstreamWriter &Stream) { 376 // Emit various pieces of data attached to a module. 377 if (!M->getTargetTriple().empty()) 378 WriteStringRecord(bitc::MODULE_CODE_TRIPLE, M->getTargetTriple(), 379 0/*TODO*/, Stream); 380 if (!M->getDataLayout().empty()) 381 WriteStringRecord(bitc::MODULE_CODE_DATALAYOUT, M->getDataLayout(), 382 0/*TODO*/, Stream); 383 if (!M->getModuleInlineAsm().empty()) 384 WriteStringRecord(bitc::MODULE_CODE_ASM, M->getModuleInlineAsm(), 385 0/*TODO*/, Stream); 386 387 // Emit information about sections and GC, computing how many there are. Also 388 // compute the maximum alignment value. 389 std::map<std::string, unsigned> SectionMap; 390 std::map<std::string, unsigned> GCMap; 391 unsigned MaxAlignment = 0; 392 unsigned MaxGlobalType = 0; 393 for (Module::const_global_iterator GV = M->global_begin(),E = M->global_end(); 394 GV != E; ++GV) { 395 MaxAlignment = std::max(MaxAlignment, GV->getAlignment()); 396 MaxGlobalType = std::max(MaxGlobalType, VE.getTypeID(GV->getType())); 397 398 if (!GV->hasSection()) continue; 399 // Give section names unique ID's. 400 unsigned &Entry = SectionMap[GV->getSection()]; 401 if (Entry != 0) continue; 402 WriteStringRecord(bitc::MODULE_CODE_SECTIONNAME, GV->getSection(), 403 0/*TODO*/, Stream); 404 Entry = SectionMap.size(); 405 } 406 for (Module::const_iterator F = M->begin(), E = M->end(); F != E; ++F) { 407 MaxAlignment = std::max(MaxAlignment, F->getAlignment()); 408 if (F->hasSection()) { 409 // Give section names unique ID's. 410 unsigned &Entry = SectionMap[F->getSection()]; 411 if (!Entry) { 412 WriteStringRecord(bitc::MODULE_CODE_SECTIONNAME, F->getSection(), 413 0/*TODO*/, Stream); 414 Entry = SectionMap.size(); 415 } 416 } 417 if (F->hasGC()) { 418 // Same for GC names. 419 unsigned &Entry = GCMap[F->getGC()]; 420 if (!Entry) { 421 WriteStringRecord(bitc::MODULE_CODE_GCNAME, F->getGC(), 422 0/*TODO*/, Stream); 423 Entry = GCMap.size(); 424 } 425 } 426 } 427 428 // Emit abbrev for globals, now that we know # sections and max alignment. 429 unsigned SimpleGVarAbbrev = 0; 430 if (!M->global_empty()) { 431 // Add an abbrev for common globals with no visibility or thread localness. 432 BitCodeAbbrev *Abbv = new BitCodeAbbrev(); 433 Abbv->Add(BitCodeAbbrevOp(bitc::MODULE_CODE_GLOBALVAR)); 434 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 435 Log2_32_Ceil(MaxGlobalType+1))); 436 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // Constant. 437 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Initializer. 438 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 4)); // Linkage. 439 if (MaxAlignment == 0) // Alignment. 440 Abbv->Add(BitCodeAbbrevOp(0)); 441 else { 442 unsigned MaxEncAlignment = Log2_32(MaxAlignment)+1; 443 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 444 Log2_32_Ceil(MaxEncAlignment+1))); 445 } 446 if (SectionMap.empty()) // Section. 447 Abbv->Add(BitCodeAbbrevOp(0)); 448 else 449 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 450 Log2_32_Ceil(SectionMap.size()+1))); 451 // Don't bother emitting vis + thread local. 452 SimpleGVarAbbrev = Stream.EmitAbbrev(Abbv); 453 } 454 455 // Emit the global variable information. 456 SmallVector<unsigned, 64> Vals; 457 for (Module::const_global_iterator GV = M->global_begin(),E = M->global_end(); 458 GV != E; ++GV) { 459 unsigned AbbrevToUse = 0; 460 461 // GLOBALVAR: [type, isconst, initid, 462 // linkage, alignment, section, visibility, threadlocal, 463 // unnamed_addr] 464 Vals.push_back(VE.getTypeID(GV->getType())); 465 Vals.push_back(GV->isConstant()); 466 Vals.push_back(GV->isDeclaration() ? 0 : 467 (VE.getValueID(GV->getInitializer()) + 1)); 468 Vals.push_back(getEncodedLinkage(GV)); 469 Vals.push_back(Log2_32(GV->getAlignment())+1); 470 Vals.push_back(GV->hasSection() ? SectionMap[GV->getSection()] : 0); 471 if (GV->isThreadLocal() || 472 GV->getVisibility() != GlobalValue::DefaultVisibility || 473 GV->hasUnnamedAddr()) { 474 Vals.push_back(getEncodedVisibility(GV)); 475 Vals.push_back(GV->isThreadLocal()); 476 Vals.push_back(GV->hasUnnamedAddr()); 477 } else { 478 AbbrevToUse = SimpleGVarAbbrev; 479 } 480 481 Stream.EmitRecord(bitc::MODULE_CODE_GLOBALVAR, Vals, AbbrevToUse); 482 Vals.clear(); 483 } 484 485 // Emit the function proto information. 486 for (Module::const_iterator F = M->begin(), E = M->end(); F != E; ++F) { 487 // FUNCTION: [type, callingconv, isproto, paramattr, 488 // linkage, alignment, section, visibility, gc, unnamed_addr] 489 Vals.push_back(VE.getTypeID(F->getType())); 490 Vals.push_back(F->getCallingConv()); 491 Vals.push_back(F->isDeclaration()); 492 Vals.push_back(getEncodedLinkage(F)); 493 Vals.push_back(VE.getAttributeID(F->getAttributes())); 494 Vals.push_back(Log2_32(F->getAlignment())+1); 495 Vals.push_back(F->hasSection() ? SectionMap[F->getSection()] : 0); 496 Vals.push_back(getEncodedVisibility(F)); 497 Vals.push_back(F->hasGC() ? GCMap[F->getGC()] : 0); 498 Vals.push_back(F->hasUnnamedAddr()); 499 500 unsigned AbbrevToUse = 0; 501 Stream.EmitRecord(bitc::MODULE_CODE_FUNCTION, Vals, AbbrevToUse); 502 Vals.clear(); 503 } 504 505 // Emit the alias information. 506 for (Module::const_alias_iterator AI = M->alias_begin(), E = M->alias_end(); 507 AI != E; ++AI) { 508 Vals.push_back(VE.getTypeID(AI->getType())); 509 Vals.push_back(VE.getValueID(AI->getAliasee())); 510 Vals.push_back(getEncodedLinkage(AI)); 511 Vals.push_back(getEncodedVisibility(AI)); 512 unsigned AbbrevToUse = 0; 513 Stream.EmitRecord(bitc::MODULE_CODE_ALIAS, Vals, AbbrevToUse); 514 Vals.clear(); 515 } 516 } 517 518 static uint64_t GetOptimizationFlags(const Value *V) { 519 uint64_t Flags = 0; 520 521 if (const OverflowingBinaryOperator *OBO = 522 dyn_cast<OverflowingBinaryOperator>(V)) { 523 if (OBO->hasNoSignedWrap()) 524 Flags |= 1 << bitc::OBO_NO_SIGNED_WRAP; 525 if (OBO->hasNoUnsignedWrap()) 526 Flags |= 1 << bitc::OBO_NO_UNSIGNED_WRAP; 527 } else if (const PossiblyExactOperator *PEO = 528 dyn_cast<PossiblyExactOperator>(V)) { 529 if (PEO->isExact()) 530 Flags |= 1 << bitc::PEO_EXACT; 531 } 532 533 return Flags; 534 } 535 536 static void WriteMDNode(const MDNode *N, 537 const llvm_2_9_func::ValueEnumerator &VE, 538 BitstreamWriter &Stream, 539 SmallVector<uint64_t, 64> &Record) { 540 for (unsigned i = 0, e = N->getNumOperands(); i != e; ++i) { 541 if (N->getOperand(i)) { 542 Record.push_back(VE.getTypeID(N->getOperand(i)->getType())); 543 Record.push_back(VE.getValueID(N->getOperand(i))); 544 } else { 545 Record.push_back(VE.getTypeID(Type::getVoidTy(N->getContext()))); 546 Record.push_back(0); 547 } 548 } 549 unsigned MDCode = N->isFunctionLocal() ? bitc::METADATA_FN_NODE : 550 bitc::METADATA_NODE; 551 Stream.EmitRecord(MDCode, Record, 0); 552 Record.clear(); 553 } 554 555 static void WriteModuleMetadata(const Module *M, 556 const llvm_2_9_func::ValueEnumerator &VE, 557 BitstreamWriter &Stream) { 558 const llvm_2_9_func::ValueEnumerator::ValueList &Vals = VE.getMDValues(); 559 bool StartedMetadataBlock = false; 560 unsigned MDSAbbrev = 0; 561 SmallVector<uint64_t, 64> Record; 562 for (unsigned i = 0, e = Vals.size(); i != e; ++i) { 563 564 if (const MDNode *N = dyn_cast<MDNode>(Vals[i].first)) { 565 if (!N->isFunctionLocal() || !N->getFunction()) { 566 if (!StartedMetadataBlock) { 567 Stream.EnterSubblock(bitc::METADATA_BLOCK_ID, 3); 568 StartedMetadataBlock = true; 569 } 570 WriteMDNode(N, VE, Stream, Record); 571 } 572 } else if (const MDString *MDS = dyn_cast<MDString>(Vals[i].first)) { 573 if (!StartedMetadataBlock) { 574 Stream.EnterSubblock(bitc::METADATA_BLOCK_ID, 3); 575 576 // Abbrev for METADATA_STRING. 577 BitCodeAbbrev *Abbv = new BitCodeAbbrev(); 578 Abbv->Add(BitCodeAbbrevOp(bitc::METADATA_STRING)); 579 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array)); 580 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 8)); 581 MDSAbbrev = Stream.EmitAbbrev(Abbv); 582 StartedMetadataBlock = true; 583 } 584 585 // Code: [strchar x N] 586 Record.append(MDS->begin(), MDS->end()); 587 588 // Emit the finished record. 589 Stream.EmitRecord(bitc::METADATA_STRING, Record, MDSAbbrev); 590 Record.clear(); 591 } 592 } 593 594 // Write named metadata. 595 for (Module::const_named_metadata_iterator I = M->named_metadata_begin(), 596 E = M->named_metadata_end(); I != E; ++I) { 597 const NamedMDNode *NMD = I; 598 if (!StartedMetadataBlock) { 599 Stream.EnterSubblock(bitc::METADATA_BLOCK_ID, 3); 600 StartedMetadataBlock = true; 601 } 602 603 // Write name. 604 StringRef Str = NMD->getName(); 605 for (unsigned i = 0, e = Str.size(); i != e; ++i) 606 Record.push_back(Str[i]); 607 Stream.EmitRecord(bitc::METADATA_NAME, Record, 0/*TODO*/); 608 Record.clear(); 609 610 // Write named metadata operands. 611 for (unsigned i = 0, e = NMD->getNumOperands(); i != e; ++i) 612 Record.push_back(VE.getValueID(NMD->getOperand(i))); 613 Stream.EmitRecord(bitc::METADATA_NAMED_NODE, Record, 0); 614 Record.clear(); 615 } 616 617 if (StartedMetadataBlock) 618 Stream.ExitBlock(); 619 } 620 621 static void WriteFunctionLocalMetadata(const Function &F, 622 const llvm_2_9_func::ValueEnumerator &VE, 623 BitstreamWriter &Stream) { 624 bool StartedMetadataBlock = false; 625 SmallVector<uint64_t, 64> Record; 626 const SmallVector<const MDNode *, 8> &Vals = VE.getFunctionLocalMDValues(); 627 for (unsigned i = 0, e = Vals.size(); i != e; ++i) 628 if (const MDNode *N = Vals[i]) 629 if (N->isFunctionLocal() && N->getFunction() == &F) { 630 if (!StartedMetadataBlock) { 631 Stream.EnterSubblock(bitc::METADATA_BLOCK_ID, 3); 632 StartedMetadataBlock = true; 633 } 634 WriteMDNode(N, VE, Stream, Record); 635 } 636 637 if (StartedMetadataBlock) 638 Stream.ExitBlock(); 639 } 640 641 static void WriteMetadataAttachment(const Function &F, 642 const llvm_2_9_func::ValueEnumerator &VE, 643 BitstreamWriter &Stream) { 644 Stream.EnterSubblock(bitc::METADATA_ATTACHMENT_ID, 3); 645 646 SmallVector<uint64_t, 64> Record; 647 648 // Write metadata attachments 649 // METADATA_ATTACHMENT - [m x [value, [n x [id, mdnode]]] 650 SmallVector<std::pair<unsigned, MDNode*>, 4> MDs; 651 652 for (Function::const_iterator BB = F.begin(), E = F.end(); BB != E; ++BB) 653 for (BasicBlock::const_iterator I = BB->begin(), E = BB->end(); 654 I != E; ++I) { 655 MDs.clear(); 656 I->getAllMetadataOtherThanDebugLoc(MDs); 657 658 // If no metadata, ignore instruction. 659 if (MDs.empty()) continue; 660 661 Record.push_back(VE.getInstructionID(I)); 662 663 for (unsigned i = 0, e = MDs.size(); i != e; ++i) { 664 Record.push_back(MDs[i].first); 665 Record.push_back(VE.getValueID(MDs[i].second)); 666 } 667 Stream.EmitRecord(bitc::METADATA_ATTACHMENT, Record, 0); 668 Record.clear(); 669 } 670 671 Stream.ExitBlock(); 672 } 673 674 static void WriteModuleMetadataStore(const Module *M, BitstreamWriter &Stream) { 675 SmallVector<uint64_t, 64> Record; 676 677 // Write metadata kinds 678 // METADATA_KIND - [n x [id, name]] 679 SmallVector<StringRef, 4> Names; 680 M->getMDKindNames(Names); 681 682 if (Names.empty()) return; 683 684 Stream.EnterSubblock(bitc::METADATA_BLOCK_ID, 3); 685 686 for (unsigned MDKindID = 0, e = Names.size(); MDKindID != e; ++MDKindID) { 687 Record.push_back(MDKindID); 688 StringRef KName = Names[MDKindID]; 689 Record.append(KName.begin(), KName.end()); 690 691 Stream.EmitRecord(bitc::METADATA_KIND, Record, 0); 692 Record.clear(); 693 } 694 695 Stream.ExitBlock(); 696 } 697 698 static void WriteConstants(unsigned FirstVal, unsigned LastVal, 699 const llvm_2_9_func::ValueEnumerator &VE, 700 BitstreamWriter &Stream, bool isGlobal) { 701 if (FirstVal == LastVal) return; 702 703 Stream.EnterSubblock(bitc::CONSTANTS_BLOCK_ID, 4); 704 705 unsigned AggregateAbbrev = 0; 706 unsigned String8Abbrev = 0; 707 unsigned CString7Abbrev = 0; 708 unsigned CString6Abbrev = 0; 709 // If this is a constant pool for the module, emit module-specific abbrevs. 710 if (isGlobal) { 711 // Abbrev for CST_CODE_AGGREGATE. 712 BitCodeAbbrev *Abbv = new BitCodeAbbrev(); 713 Abbv->Add(BitCodeAbbrevOp(bitc::CST_CODE_AGGREGATE)); 714 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array)); 715 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, Log2_32_Ceil(LastVal+1))); 716 AggregateAbbrev = Stream.EmitAbbrev(Abbv); 717 718 // Abbrev for CST_CODE_STRING. 719 Abbv = new BitCodeAbbrev(); 720 Abbv->Add(BitCodeAbbrevOp(bitc::CST_CODE_STRING)); 721 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array)); 722 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 8)); 723 String8Abbrev = Stream.EmitAbbrev(Abbv); 724 // Abbrev for CST_CODE_CSTRING. 725 Abbv = new BitCodeAbbrev(); 726 Abbv->Add(BitCodeAbbrevOp(bitc::CST_CODE_CSTRING)); 727 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array)); 728 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 7)); 729 CString7Abbrev = Stream.EmitAbbrev(Abbv); 730 // Abbrev for CST_CODE_CSTRING. 731 Abbv = new BitCodeAbbrev(); 732 Abbv->Add(BitCodeAbbrevOp(bitc::CST_CODE_CSTRING)); 733 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array)); 734 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Char6)); 735 CString6Abbrev = Stream.EmitAbbrev(Abbv); 736 } 737 738 SmallVector<uint64_t, 64> Record; 739 740 const llvm_2_9_func::ValueEnumerator::ValueList &Vals = VE.getValues(); 741 Type *LastTy = 0; 742 for (unsigned i = FirstVal; i != LastVal; ++i) { 743 const Value *V = Vals[i].first; 744 // If we need to switch types, do so now. 745 if (V->getType() != LastTy) { 746 LastTy = V->getType(); 747 Record.push_back(VE.getTypeID(LastTy)); 748 Stream.EmitRecord(bitc::CST_CODE_SETTYPE, Record, 749 CONSTANTS_SETTYPE_ABBREV); 750 Record.clear(); 751 } 752 753 if (const InlineAsm *IA = dyn_cast<InlineAsm>(V)) { 754 Record.push_back(unsigned(IA->hasSideEffects()) | 755 unsigned(IA->isAlignStack()) << 1); 756 757 // Add the asm string. 758 const std::string &AsmStr = IA->getAsmString(); 759 Record.push_back(AsmStr.size()); 760 for (unsigned i = 0, e = AsmStr.size(); i != e; ++i) 761 Record.push_back(AsmStr[i]); 762 763 // Add the constraint string. 764 const std::string &ConstraintStr = IA->getConstraintString(); 765 Record.push_back(ConstraintStr.size()); 766 for (unsigned i = 0, e = ConstraintStr.size(); i != e; ++i) 767 Record.push_back(ConstraintStr[i]); 768 Stream.EmitRecord(bitc::CST_CODE_INLINEASM, Record); 769 Record.clear(); 770 continue; 771 } 772 const Constant *C = cast<Constant>(V); 773 unsigned Code = -1U; 774 unsigned AbbrevToUse = 0; 775 if (C->isNullValue()) { 776 Code = bitc::CST_CODE_NULL; 777 } else if (isa<UndefValue>(C)) { 778 Code = bitc::CST_CODE_UNDEF; 779 } else if (const ConstantInt *IV = dyn_cast<ConstantInt>(C)) { 780 if (IV->getBitWidth() <= 64) { 781 uint64_t V = IV->getSExtValue(); 782 if ((int64_t)V >= 0) 783 Record.push_back(V << 1); 784 else 785 Record.push_back((-V << 1) | 1); 786 Code = bitc::CST_CODE_INTEGER; 787 AbbrevToUse = CONSTANTS_INTEGER_ABBREV; 788 } else { // Wide integers, > 64 bits in size. 789 // We have an arbitrary precision integer value to write whose 790 // bit width is > 64. However, in canonical unsigned integer 791 // format it is likely that the high bits are going to be zero. 792 // So, we only write the number of active words. 793 unsigned NWords = IV->getValue().getActiveWords(); 794 const uint64_t *RawWords = IV->getValue().getRawData(); 795 for (unsigned i = 0; i != NWords; ++i) { 796 int64_t V = RawWords[i]; 797 if (V >= 0) 798 Record.push_back(V << 1); 799 else 800 Record.push_back((-V << 1) | 1); 801 } 802 Code = bitc::CST_CODE_WIDE_INTEGER; 803 } 804 } else if (const ConstantFP *CFP = dyn_cast<ConstantFP>(C)) { 805 Code = bitc::CST_CODE_FLOAT; 806 Type *Ty = CFP->getType(); 807 if (Ty->isFloatTy() || Ty->isDoubleTy()) { 808 Record.push_back(CFP->getValueAPF().bitcastToAPInt().getZExtValue()); 809 } else if (Ty->isX86_FP80Ty()) { 810 // api needed to prevent premature destruction 811 // bits are not in the same order as a normal i80 APInt, compensate. 812 APInt api = CFP->getValueAPF().bitcastToAPInt(); 813 const uint64_t *p = api.getRawData(); 814 Record.push_back((p[1] << 48) | (p[0] >> 16)); 815 Record.push_back(p[0] & 0xffffLL); 816 } else if (Ty->isFP128Ty() || Ty->isPPC_FP128Ty()) { 817 APInt api = CFP->getValueAPF().bitcastToAPInt(); 818 const uint64_t *p = api.getRawData(); 819 Record.push_back(p[0]); 820 Record.push_back(p[1]); 821 } else { 822 assert (0 && "Unknown FP type!"); 823 } 824 } else if (isa<ConstantDataSequential>(C) && 825 cast<ConstantDataSequential>(C)->isString()) { 826 const ConstantDataSequential *Str = cast<ConstantDataSequential>(C); 827 // Emit constant strings specially. 828 unsigned NumElts = Str->getNumElements(); 829 // If this is a null-terminated string, use the denser CSTRING encoding. 830 if (Str->isCString()) { 831 Code = bitc::CST_CODE_CSTRING; 832 --NumElts; // Don't encode the null, which isn't allowed by char6. 833 } else { 834 Code = bitc::CST_CODE_STRING; 835 AbbrevToUse = String8Abbrev; 836 } 837 bool isCStr7 = Code == bitc::CST_CODE_CSTRING; 838 bool isCStrChar6 = Code == bitc::CST_CODE_CSTRING; 839 for (unsigned i = 0; i != NumElts; ++i) { 840 unsigned char V = Str->getElementAsInteger(i); 841 Record.push_back(V); 842 isCStr7 &= (V & 128) == 0; 843 if (isCStrChar6) 844 isCStrChar6 = BitCodeAbbrevOp::isChar6(V); 845 } 846 847 if (isCStrChar6) 848 AbbrevToUse = CString6Abbrev; 849 else if (isCStr7) 850 AbbrevToUse = CString7Abbrev; 851 } else if (const ConstantDataSequential *CDS = 852 dyn_cast<ConstantDataSequential>(C)) { 853 // We must replace ConstantDataSequential's representation with the 854 // legacy ConstantArray/ConstantVector/ConstantStruct version. 855 // ValueEnumerator is similarly modified to mark the appropriate 856 // Constants as used (so they are emitted). 857 Code = bitc::CST_CODE_AGGREGATE; 858 for (unsigned i = 0, e = CDS->getNumElements(); i != e; ++i) 859 Record.push_back(VE.getValueID(CDS->getElementAsConstant(i))); 860 AbbrevToUse = AggregateAbbrev; 861 } else if (isa<ConstantArray>(C) || isa<ConstantStruct>(C) || 862 isa<ConstantVector>(C)) { 863 Code = bitc::CST_CODE_AGGREGATE; 864 for (unsigned i = 0, e = C->getNumOperands(); i != e; ++i) 865 Record.push_back(VE.getValueID(C->getOperand(i))); 866 AbbrevToUse = AggregateAbbrev; 867 } else if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(C)) { 868 switch (CE->getOpcode()) { 869 default: 870 if (Instruction::isCast(CE->getOpcode())) { 871 Code = bitc::CST_CODE_CE_CAST; 872 Record.push_back(GetEncodedCastOpcode(CE->getOpcode())); 873 Record.push_back(VE.getTypeID(C->getOperand(0)->getType())); 874 Record.push_back(VE.getValueID(C->getOperand(0))); 875 AbbrevToUse = CONSTANTS_CE_CAST_Abbrev; 876 } else { 877 assert(CE->getNumOperands() == 2 && "Unknown constant expr!"); 878 Code = bitc::CST_CODE_CE_BINOP; 879 Record.push_back(GetEncodedBinaryOpcode(CE->getOpcode())); 880 Record.push_back(VE.getValueID(C->getOperand(0))); 881 Record.push_back(VE.getValueID(C->getOperand(1))); 882 uint64_t Flags = GetOptimizationFlags(CE); 883 if (Flags != 0) 884 Record.push_back(Flags); 885 } 886 break; 887 case Instruction::GetElementPtr: 888 Code = bitc::CST_CODE_CE_GEP; 889 if (cast<GEPOperator>(C)->isInBounds()) 890 Code = bitc::CST_CODE_CE_INBOUNDS_GEP; 891 for (unsigned i = 0, e = CE->getNumOperands(); i != e; ++i) { 892 Record.push_back(VE.getTypeID(C->getOperand(i)->getType())); 893 Record.push_back(VE.getValueID(C->getOperand(i))); 894 } 895 break; 896 case Instruction::Select: 897 Code = bitc::CST_CODE_CE_SELECT; 898 Record.push_back(VE.getValueID(C->getOperand(0))); 899 Record.push_back(VE.getValueID(C->getOperand(1))); 900 Record.push_back(VE.getValueID(C->getOperand(2))); 901 break; 902 case Instruction::ExtractElement: 903 Code = bitc::CST_CODE_CE_EXTRACTELT; 904 Record.push_back(VE.getTypeID(C->getOperand(0)->getType())); 905 Record.push_back(VE.getValueID(C->getOperand(0))); 906 Record.push_back(VE.getValueID(C->getOperand(1))); 907 break; 908 case Instruction::InsertElement: 909 Code = bitc::CST_CODE_CE_INSERTELT; 910 Record.push_back(VE.getValueID(C->getOperand(0))); 911 Record.push_back(VE.getValueID(C->getOperand(1))); 912 Record.push_back(VE.getValueID(C->getOperand(2))); 913 break; 914 case Instruction::ShuffleVector: 915 // If the return type and argument types are the same, this is a 916 // standard shufflevector instruction. If the types are different, 917 // then the shuffle is widening or truncating the input vectors, and 918 // the argument type must also be encoded. 919 if (C->getType() == C->getOperand(0)->getType()) { 920 Code = bitc::CST_CODE_CE_SHUFFLEVEC; 921 } else { 922 Code = bitc::CST_CODE_CE_SHUFVEC_EX; 923 Record.push_back(VE.getTypeID(C->getOperand(0)->getType())); 924 } 925 Record.push_back(VE.getValueID(C->getOperand(0))); 926 Record.push_back(VE.getValueID(C->getOperand(1))); 927 Record.push_back(VE.getValueID(C->getOperand(2))); 928 break; 929 case Instruction::ICmp: 930 case Instruction::FCmp: 931 Code = bitc::CST_CODE_CE_CMP; 932 Record.push_back(VE.getTypeID(C->getOperand(0)->getType())); 933 Record.push_back(VE.getValueID(C->getOperand(0))); 934 Record.push_back(VE.getValueID(C->getOperand(1))); 935 Record.push_back(CE->getPredicate()); 936 break; 937 } 938 } else if (const BlockAddress *BA = dyn_cast<BlockAddress>(C)) { 939 Code = bitc::CST_CODE_BLOCKADDRESS; 940 Record.push_back(VE.getTypeID(BA->getFunction()->getType())); 941 Record.push_back(VE.getValueID(BA->getFunction())); 942 Record.push_back(VE.getGlobalBasicBlockID(BA->getBasicBlock())); 943 } else { 944 #ifndef NDEBUG 945 C->dump(); 946 #endif 947 llvm_unreachable("Unknown constant!"); 948 } 949 Stream.EmitRecord(Code, Record, AbbrevToUse); 950 Record.clear(); 951 } 952 953 Stream.ExitBlock(); 954 } 955 956 static void WriteModuleConstants(const llvm_2_9_func::ValueEnumerator &VE, 957 BitstreamWriter &Stream) { 958 const llvm_2_9_func::ValueEnumerator::ValueList &Vals = VE.getValues(); 959 960 // Find the first constant to emit, which is the first non-globalvalue value. 961 // We know globalvalues have been emitted by WriteModuleInfo. 962 for (unsigned i = 0, e = Vals.size(); i != e; ++i) { 963 if (!isa<GlobalValue>(Vals[i].first)) { 964 WriteConstants(i, Vals.size(), VE, Stream, true); 965 return; 966 } 967 } 968 } 969 970 /// PushValueAndType - The file has to encode both the value and type id for 971 /// many values, because we need to know what type to create for forward 972 /// references. However, most operands are not forward references, so this type 973 /// field is not needed. 974 /// 975 /// This function adds V's value ID to Vals. If the value ID is higher than the 976 /// instruction ID, then it is a forward reference, and it also includes the 977 /// type ID. 978 static bool PushValueAndType(const Value *V, unsigned InstID, 979 SmallVector<unsigned, 64> &Vals, 980 llvm_2_9_func::ValueEnumerator &VE) { 981 unsigned ValID = VE.getValueID(V); 982 Vals.push_back(ValID); 983 if (ValID >= InstID) { 984 Vals.push_back(VE.getTypeID(V->getType())); 985 return true; 986 } 987 return false; 988 } 989 990 /// WriteInstruction - Emit an instruction to the specified stream. 991 static void WriteInstruction(const Instruction &I, unsigned InstID, 992 llvm_2_9_func::ValueEnumerator &VE, 993 BitstreamWriter &Stream, 994 SmallVector<unsigned, 64> &Vals) { 995 unsigned Code = 0; 996 unsigned AbbrevToUse = 0; 997 VE.setInstructionID(&I); 998 switch (I.getOpcode()) { 999 default: 1000 if (Instruction::isCast(I.getOpcode())) { 1001 Code = bitc::FUNC_CODE_INST_CAST; 1002 if (!PushValueAndType(I.getOperand(0), InstID, Vals, VE)) 1003 AbbrevToUse = FUNCTION_INST_CAST_ABBREV; 1004 Vals.push_back(VE.getTypeID(I.getType())); 1005 Vals.push_back(GetEncodedCastOpcode(I.getOpcode())); 1006 } else { 1007 assert(isa<BinaryOperator>(I) && "Unknown instruction!"); 1008 Code = bitc::FUNC_CODE_INST_BINOP; 1009 if (!PushValueAndType(I.getOperand(0), InstID, Vals, VE)) 1010 AbbrevToUse = FUNCTION_INST_BINOP_ABBREV; 1011 Vals.push_back(VE.getValueID(I.getOperand(1))); 1012 Vals.push_back(GetEncodedBinaryOpcode(I.getOpcode())); 1013 uint64_t Flags = GetOptimizationFlags(&I); 1014 if (Flags != 0) { 1015 if (AbbrevToUse == FUNCTION_INST_BINOP_ABBREV) 1016 AbbrevToUse = FUNCTION_INST_BINOP_FLAGS_ABBREV; 1017 Vals.push_back(Flags); 1018 } 1019 } 1020 break; 1021 1022 case Instruction::GetElementPtr: 1023 Code = bitc::FUNC_CODE_INST_GEP; 1024 if (cast<GEPOperator>(&I)->isInBounds()) 1025 Code = bitc::FUNC_CODE_INST_INBOUNDS_GEP; 1026 for (unsigned i = 0, e = I.getNumOperands(); i != e; ++i) 1027 PushValueAndType(I.getOperand(i), InstID, Vals, VE); 1028 break; 1029 case Instruction::ExtractValue: { 1030 Code = bitc::FUNC_CODE_INST_EXTRACTVAL; 1031 PushValueAndType(I.getOperand(0), InstID, Vals, VE); 1032 const ExtractValueInst *EVI = cast<ExtractValueInst>(&I); 1033 for (const unsigned *i = EVI->idx_begin(), *e = EVI->idx_end(); i != e; ++i) 1034 Vals.push_back(*i); 1035 break; 1036 } 1037 case Instruction::InsertValue: { 1038 Code = bitc::FUNC_CODE_INST_INSERTVAL; 1039 PushValueAndType(I.getOperand(0), InstID, Vals, VE); 1040 PushValueAndType(I.getOperand(1), InstID, Vals, VE); 1041 const InsertValueInst *IVI = cast<InsertValueInst>(&I); 1042 for (const unsigned *i = IVI->idx_begin(), *e = IVI->idx_end(); i != e; ++i) 1043 Vals.push_back(*i); 1044 break; 1045 } 1046 case Instruction::Select: 1047 Code = bitc::FUNC_CODE_INST_VSELECT; 1048 PushValueAndType(I.getOperand(1), InstID, Vals, VE); 1049 Vals.push_back(VE.getValueID(I.getOperand(2))); 1050 PushValueAndType(I.getOperand(0), InstID, Vals, VE); 1051 break; 1052 case Instruction::ExtractElement: 1053 Code = bitc::FUNC_CODE_INST_EXTRACTELT; 1054 PushValueAndType(I.getOperand(0), InstID, Vals, VE); 1055 Vals.push_back(VE.getValueID(I.getOperand(1))); 1056 break; 1057 case Instruction::InsertElement: 1058 Code = bitc::FUNC_CODE_INST_INSERTELT; 1059 PushValueAndType(I.getOperand(0), InstID, Vals, VE); 1060 Vals.push_back(VE.getValueID(I.getOperand(1))); 1061 Vals.push_back(VE.getValueID(I.getOperand(2))); 1062 break; 1063 case Instruction::ShuffleVector: 1064 Code = bitc::FUNC_CODE_INST_SHUFFLEVEC; 1065 PushValueAndType(I.getOperand(0), InstID, Vals, VE); 1066 Vals.push_back(VE.getValueID(I.getOperand(1))); 1067 Vals.push_back(VE.getValueID(I.getOperand(2))); 1068 break; 1069 case Instruction::ICmp: 1070 case Instruction::FCmp: 1071 // compare returning Int1Ty or vector of Int1Ty 1072 Code = bitc::FUNC_CODE_INST_CMP2; 1073 PushValueAndType(I.getOperand(0), InstID, Vals, VE); 1074 Vals.push_back(VE.getValueID(I.getOperand(1))); 1075 Vals.push_back(cast<CmpInst>(I).getPredicate()); 1076 break; 1077 1078 case Instruction::Ret: 1079 { 1080 Code = bitc::FUNC_CODE_INST_RET; 1081 unsigned NumOperands = I.getNumOperands(); 1082 if (NumOperands == 0) 1083 AbbrevToUse = FUNCTION_INST_RET_VOID_ABBREV; 1084 else if (NumOperands == 1) { 1085 if (!PushValueAndType(I.getOperand(0), InstID, Vals, VE)) 1086 AbbrevToUse = FUNCTION_INST_RET_VAL_ABBREV; 1087 } else { 1088 for (unsigned i = 0, e = NumOperands; i != e; ++i) 1089 PushValueAndType(I.getOperand(i), InstID, Vals, VE); 1090 } 1091 } 1092 break; 1093 case Instruction::Br: 1094 { 1095 Code = bitc::FUNC_CODE_INST_BR; 1096 const BranchInst &II = cast<BranchInst>(I); 1097 Vals.push_back(VE.getValueID(II.getSuccessor(0))); 1098 if (II.isConditional()) { 1099 Vals.push_back(VE.getValueID(II.getSuccessor(1))); 1100 Vals.push_back(VE.getValueID(II.getCondition())); 1101 } 1102 } 1103 break; 1104 case Instruction::Switch: 1105 { 1106 Code = bitc::FUNC_CODE_INST_SWITCH; 1107 const SwitchInst &SI = cast<SwitchInst>(I); 1108 1109 Vals.push_back(VE.getTypeID(SI.getCondition()->getType())); 1110 Vals.push_back(VE.getValueID(SI.getCondition())); 1111 Vals.push_back(VE.getValueID(SI.getDefaultDest())); 1112 for (SwitchInst::ConstCaseIt i = SI.case_begin(), e = SI.case_end(); 1113 i != e; ++i) { 1114 const IntegersSubset& CaseRanges = i.getCaseValueEx(); 1115 1116 if (CaseRanges.isSingleNumber()) { 1117 Vals.push_back(VE.getValueID(CaseRanges.getSingleNumber(0).toConstantInt())); 1118 Vals.push_back(VE.getValueID(i.getCaseSuccessor())); 1119 } else if (CaseRanges.isSingleNumbersOnly()) { 1120 for (unsigned ri = 0, rn = CaseRanges.getNumItems(); 1121 ri != rn; ++ri) { 1122 Vals.push_back(VE.getValueID(CaseRanges.getSingleNumber(ri).toConstantInt())); 1123 Vals.push_back(VE.getValueID(i.getCaseSuccessor())); 1124 } 1125 } else { 1126 llvm_unreachable("Not single number?"); 1127 } 1128 } 1129 } 1130 break; 1131 case Instruction::IndirectBr: 1132 Code = bitc::FUNC_CODE_INST_INDIRECTBR; 1133 Vals.push_back(VE.getTypeID(I.getOperand(0)->getType())); 1134 for (unsigned i = 0, e = I.getNumOperands(); i != e; ++i) 1135 Vals.push_back(VE.getValueID(I.getOperand(i))); 1136 break; 1137 1138 case Instruction::Invoke: { 1139 const InvokeInst *II = cast<InvokeInst>(&I); 1140 const Value *Callee(II->getCalledValue()); 1141 PointerType *PTy = cast<PointerType>(Callee->getType()); 1142 FunctionType *FTy = cast<FunctionType>(PTy->getElementType()); 1143 Code = bitc::FUNC_CODE_INST_INVOKE; 1144 1145 Vals.push_back(VE.getAttributeID(II->getAttributes())); 1146 Vals.push_back(II->getCallingConv()); 1147 Vals.push_back(VE.getValueID(II->getNormalDest())); 1148 Vals.push_back(VE.getValueID(II->getUnwindDest())); 1149 PushValueAndType(Callee, InstID, Vals, VE); 1150 1151 // Emit value #'s for the fixed parameters. 1152 for (unsigned i = 0, e = FTy->getNumParams(); i != e; ++i) 1153 Vals.push_back(VE.getValueID(I.getOperand(i))); // fixed param. 1154 1155 // Emit type/value pairs for varargs params. 1156 if (FTy->isVarArg()) { 1157 for (unsigned i = FTy->getNumParams(), e = I.getNumOperands()-3; 1158 i != e; ++i) 1159 PushValueAndType(I.getOperand(i), InstID, Vals, VE); // vararg 1160 } 1161 break; 1162 } 1163 case Instruction::Resume: 1164 Code = bitc::FUNC_CODE_INST_RESUME; 1165 PushValueAndType(I.getOperand(0), InstID, Vals, VE); 1166 break; 1167 case Instruction::Unreachable: 1168 Code = bitc::FUNC_CODE_INST_UNREACHABLE; 1169 AbbrevToUse = FUNCTION_INST_UNREACHABLE_ABBREV; 1170 break; 1171 1172 case Instruction::PHI: { 1173 const PHINode &PN = cast<PHINode>(I); 1174 Code = bitc::FUNC_CODE_INST_PHI; 1175 Vals.push_back(VE.getTypeID(PN.getType())); 1176 for (unsigned i = 0, e = PN.getNumIncomingValues(); i != e; ++i) { 1177 Vals.push_back(VE.getValueID(PN.getIncomingValue(i))); 1178 Vals.push_back(VE.getValueID(PN.getIncomingBlock(i))); 1179 } 1180 break; 1181 } 1182 1183 case Instruction::LandingPad: { 1184 const LandingPadInst &LP = cast<LandingPadInst>(I); 1185 Code = bitc::FUNC_CODE_INST_LANDINGPAD; 1186 Vals.push_back(VE.getTypeID(LP.getType())); 1187 PushValueAndType(LP.getPersonalityFn(), InstID, Vals, VE); 1188 Vals.push_back(LP.isCleanup()); 1189 Vals.push_back(LP.getNumClauses()); 1190 for (unsigned I = 0, E = LP.getNumClauses(); I != E; ++I) { 1191 if (LP.isCatch(I)) 1192 Vals.push_back(LandingPadInst::Catch); 1193 else 1194 Vals.push_back(LandingPadInst::Filter); 1195 PushValueAndType(LP.getClause(I), InstID, Vals, VE); 1196 } 1197 break; 1198 } 1199 1200 case Instruction::Alloca: 1201 Code = bitc::FUNC_CODE_INST_ALLOCA; 1202 Vals.push_back(VE.getTypeID(I.getType())); 1203 Vals.push_back(VE.getTypeID(I.getOperand(0)->getType())); 1204 Vals.push_back(VE.getValueID(I.getOperand(0))); // size. 1205 Vals.push_back(Log2_32(cast<AllocaInst>(I).getAlignment())+1); 1206 break; 1207 1208 case Instruction::Load: 1209 if (cast<LoadInst>(I).isAtomic()) { 1210 Code = bitc::FUNC_CODE_INST_LOADATOMIC; 1211 PushValueAndType(I.getOperand(0), InstID, Vals, VE); 1212 } else { 1213 Code = bitc::FUNC_CODE_INST_LOAD; 1214 if (!PushValueAndType(I.getOperand(0), InstID, Vals, VE)) // ptr 1215 AbbrevToUse = FUNCTION_INST_LOAD_ABBREV; 1216 } 1217 Vals.push_back(Log2_32(cast<LoadInst>(I).getAlignment())+1); 1218 Vals.push_back(cast<LoadInst>(I).isVolatile()); 1219 if (cast<LoadInst>(I).isAtomic()) { 1220 Vals.push_back(GetEncodedOrdering(cast<LoadInst>(I).getOrdering())); 1221 Vals.push_back(GetEncodedSynchScope(cast<LoadInst>(I).getSynchScope())); 1222 } 1223 break; 1224 case Instruction::Store: 1225 if (cast<StoreInst>(I).isAtomic()) 1226 Code = bitc::FUNC_CODE_INST_STOREATOMIC; 1227 else 1228 Code = bitc::FUNC_CODE_INST_STORE; 1229 PushValueAndType(I.getOperand(1), InstID, Vals, VE); // ptrty + ptr 1230 Vals.push_back(VE.getValueID(I.getOperand(0))); // val. 1231 Vals.push_back(Log2_32(cast<StoreInst>(I).getAlignment())+1); 1232 Vals.push_back(cast<StoreInst>(I).isVolatile()); 1233 if (cast<StoreInst>(I).isAtomic()) { 1234 Vals.push_back(GetEncodedOrdering(cast<StoreInst>(I).getOrdering())); 1235 Vals.push_back(GetEncodedSynchScope(cast<StoreInst>(I).getSynchScope())); 1236 } 1237 break; 1238 case Instruction::AtomicCmpXchg: 1239 Code = bitc::FUNC_CODE_INST_CMPXCHG; 1240 PushValueAndType(I.getOperand(0), InstID, Vals, VE); // ptrty + ptr 1241 Vals.push_back(VE.getValueID(I.getOperand(1))); // cmp. 1242 Vals.push_back(VE.getValueID(I.getOperand(2))); // newval. 1243 Vals.push_back(cast<AtomicCmpXchgInst>(I).isVolatile()); 1244 Vals.push_back(GetEncodedOrdering( 1245 cast<AtomicCmpXchgInst>(I).getOrdering())); 1246 Vals.push_back(GetEncodedSynchScope( 1247 cast<AtomicCmpXchgInst>(I).getSynchScope())); 1248 break; 1249 case Instruction::AtomicRMW: 1250 Code = bitc::FUNC_CODE_INST_ATOMICRMW; 1251 PushValueAndType(I.getOperand(0), InstID, Vals, VE); // ptrty + ptr 1252 Vals.push_back(VE.getValueID(I.getOperand(1))); // val. 1253 Vals.push_back(GetEncodedRMWOperation( 1254 cast<AtomicRMWInst>(I).getOperation())); 1255 Vals.push_back(cast<AtomicRMWInst>(I).isVolatile()); 1256 Vals.push_back(GetEncodedOrdering(cast<AtomicRMWInst>(I).getOrdering())); 1257 Vals.push_back(GetEncodedSynchScope( 1258 cast<AtomicRMWInst>(I).getSynchScope())); 1259 break; 1260 case Instruction::Fence: 1261 Code = bitc::FUNC_CODE_INST_FENCE; 1262 Vals.push_back(GetEncodedOrdering(cast<FenceInst>(I).getOrdering())); 1263 Vals.push_back(GetEncodedSynchScope(cast<FenceInst>(I).getSynchScope())); 1264 break; 1265 case Instruction::Call: { 1266 const CallInst &CI = cast<CallInst>(I); 1267 PointerType *PTy = cast<PointerType>(CI.getCalledValue()->getType()); 1268 FunctionType *FTy = cast<FunctionType>(PTy->getElementType()); 1269 1270 Code = bitc::FUNC_CODE_INST_CALL; 1271 1272 Vals.push_back(VE.getAttributeID(CI.getAttributes())); 1273 Vals.push_back((CI.getCallingConv() << 1) | unsigned(CI.isTailCall())); 1274 PushValueAndType(CI.getCalledValue(), InstID, Vals, VE); // Callee 1275 1276 // Emit value #'s for the fixed parameters. 1277 for (unsigned i = 0, e = FTy->getNumParams(); i != e; ++i) 1278 Vals.push_back(VE.getValueID(CI.getArgOperand(i))); // fixed param. 1279 1280 // Emit type/value pairs for varargs params. 1281 if (FTy->isVarArg()) { 1282 for (unsigned i = FTy->getNumParams(), e = CI.getNumArgOperands(); 1283 i != e; ++i) 1284 PushValueAndType(CI.getArgOperand(i), InstID, Vals, VE); // varargs 1285 } 1286 break; 1287 } 1288 case Instruction::VAArg: 1289 Code = bitc::FUNC_CODE_INST_VAARG; 1290 Vals.push_back(VE.getTypeID(I.getOperand(0)->getType())); // valistty 1291 Vals.push_back(VE.getValueID(I.getOperand(0))); // valist. 1292 Vals.push_back(VE.getTypeID(I.getType())); // restype. 1293 break; 1294 } 1295 1296 Stream.EmitRecord(Code, Vals, AbbrevToUse); 1297 Vals.clear(); 1298 } 1299 1300 // Emit names for globals/functions etc. 1301 static void WriteValueSymbolTable(const ValueSymbolTable &VST, 1302 const llvm_2_9_func::ValueEnumerator &VE, 1303 BitstreamWriter &Stream) { 1304 if (VST.empty()) return; 1305 Stream.EnterSubblock(bitc::VALUE_SYMTAB_BLOCK_ID, 4); 1306 1307 // FIXME: Set up the abbrev, we know how many values there are! 1308 // FIXME: We know if the type names can use 7-bit ascii. 1309 SmallVector<unsigned, 64> NameVals; 1310 1311 for (ValueSymbolTable::const_iterator SI = VST.begin(), SE = VST.end(); 1312 SI != SE; ++SI) { 1313 1314 const ValueName &Name = *SI; 1315 1316 // Figure out the encoding to use for the name. 1317 bool is7Bit = true; 1318 bool isChar6 = true; 1319 for (const char *C = Name.getKeyData(), *E = C+Name.getKeyLength(); 1320 C != E; ++C) { 1321 if (isChar6) 1322 isChar6 = BitCodeAbbrevOp::isChar6(*C); 1323 if ((unsigned char)*C & 128) { 1324 is7Bit = false; 1325 break; // don't bother scanning the rest. 1326 } 1327 } 1328 1329 unsigned AbbrevToUse = VST_ENTRY_8_ABBREV; 1330 1331 // VST_ENTRY: [valueid, namechar x N] 1332 // VST_BBENTRY: [bbid, namechar x N] 1333 unsigned Code; 1334 if (isa<BasicBlock>(SI->getValue())) { 1335 Code = bitc::VST_CODE_BBENTRY; 1336 if (isChar6) 1337 AbbrevToUse = VST_BBENTRY_6_ABBREV; 1338 } else { 1339 Code = bitc::VST_CODE_ENTRY; 1340 if (isChar6) 1341 AbbrevToUse = VST_ENTRY_6_ABBREV; 1342 else if (is7Bit) 1343 AbbrevToUse = VST_ENTRY_7_ABBREV; 1344 } 1345 1346 NameVals.push_back(VE.getValueID(SI->getValue())); 1347 for (const char *P = Name.getKeyData(), 1348 *E = Name.getKeyData()+Name.getKeyLength(); P != E; ++P) 1349 NameVals.push_back((unsigned char)*P); 1350 1351 // Emit the finished record. 1352 Stream.EmitRecord(Code, NameVals, AbbrevToUse); 1353 NameVals.clear(); 1354 } 1355 Stream.ExitBlock(); 1356 } 1357 1358 /// WriteFunction - Emit a function body to the module stream. 1359 static void WriteFunction(const Function &F, llvm_2_9_func::ValueEnumerator &VE, 1360 BitstreamWriter &Stream) { 1361 Stream.EnterSubblock(bitc::FUNCTION_BLOCK_ID, 4); 1362 VE.incorporateFunction(F); 1363 1364 SmallVector<unsigned, 64> Vals; 1365 1366 // Emit the number of basic blocks, so the reader can create them ahead of 1367 // time. 1368 Vals.push_back(VE.getBasicBlocks().size()); 1369 Stream.EmitRecord(bitc::FUNC_CODE_DECLAREBLOCKS, Vals); 1370 Vals.clear(); 1371 1372 // If there are function-local constants, emit them now. 1373 unsigned CstStart, CstEnd; 1374 VE.getFunctionConstantRange(CstStart, CstEnd); 1375 WriteConstants(CstStart, CstEnd, VE, Stream, false); 1376 1377 // If there is function-local metadata, emit it now. 1378 WriteFunctionLocalMetadata(F, VE, Stream); 1379 1380 // Keep a running idea of what the instruction ID is. 1381 unsigned InstID = CstEnd; 1382 1383 bool NeedsMetadataAttachment = false; 1384 1385 DebugLoc LastDL; 1386 1387 // Finally, emit all the instructions, in order. 1388 for (Function::const_iterator BB = F.begin(), E = F.end(); BB != E; ++BB) 1389 for (BasicBlock::const_iterator I = BB->begin(), E = BB->end(); 1390 I != E; ++I) { 1391 WriteInstruction(*I, InstID, VE, Stream, Vals); 1392 1393 if (!I->getType()->isVoidTy()) 1394 ++InstID; 1395 1396 // If the instruction has metadata, write a metadata attachment later. 1397 NeedsMetadataAttachment |= I->hasMetadataOtherThanDebugLoc(); 1398 1399 // If the instruction has a debug location, emit it. 1400 DebugLoc DL = I->getDebugLoc(); 1401 if (DL.isUnknown()) { 1402 // nothing todo. 1403 } else if (DL == LastDL) { 1404 // Just repeat the same debug loc as last time. 1405 Stream.EmitRecord(bitc::FUNC_CODE_DEBUG_LOC_AGAIN, Vals); 1406 } else { 1407 MDNode *Scope, *IA; 1408 DL.getScopeAndInlinedAt(Scope, IA, I->getContext()); 1409 1410 Vals.push_back(DL.getLine()); 1411 Vals.push_back(DL.getCol()); 1412 Vals.push_back(Scope ? VE.getValueID(Scope)+1 : 0); 1413 Vals.push_back(IA ? VE.getValueID(IA)+1 : 0); 1414 Stream.EmitRecord(bitc::FUNC_CODE_DEBUG_LOC, Vals); 1415 Vals.clear(); 1416 1417 LastDL = DL; 1418 } 1419 } 1420 1421 // Emit names for all the instructions etc. 1422 WriteValueSymbolTable(F.getValueSymbolTable(), VE, Stream); 1423 1424 if (NeedsMetadataAttachment) 1425 WriteMetadataAttachment(F, VE, Stream); 1426 VE.purgeFunction(); 1427 Stream.ExitBlock(); 1428 } 1429 1430 // Emit blockinfo, which defines the standard abbreviations etc. 1431 static void WriteBlockInfo(const llvm_2_9_func::ValueEnumerator &VE, 1432 BitstreamWriter &Stream) { 1433 // We only want to emit block info records for blocks that have multiple 1434 // instances: CONSTANTS_BLOCK, FUNCTION_BLOCK and VALUE_SYMTAB_BLOCK. Other 1435 // blocks can defined their abbrevs inline. 1436 Stream.EnterBlockInfoBlock(2); 1437 1438 { // 8-bit fixed-width VST_ENTRY/VST_BBENTRY strings. 1439 BitCodeAbbrev *Abbv = new BitCodeAbbrev(); 1440 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 3)); 1441 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8)); 1442 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array)); 1443 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 8)); 1444 if (Stream.EmitBlockInfoAbbrev(bitc::VALUE_SYMTAB_BLOCK_ID, 1445 Abbv) != VST_ENTRY_8_ABBREV) 1446 llvm_unreachable("Unexpected abbrev ordering!"); 1447 } 1448 1449 { // 7-bit fixed width VST_ENTRY strings. 1450 BitCodeAbbrev *Abbv = new BitCodeAbbrev(); 1451 Abbv->Add(BitCodeAbbrevOp(bitc::VST_CODE_ENTRY)); 1452 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8)); 1453 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array)); 1454 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 7)); 1455 if (Stream.EmitBlockInfoAbbrev(bitc::VALUE_SYMTAB_BLOCK_ID, 1456 Abbv) != VST_ENTRY_7_ABBREV) 1457 llvm_unreachable("Unexpected abbrev ordering!"); 1458 } 1459 { // 6-bit char6 VST_ENTRY strings. 1460 BitCodeAbbrev *Abbv = new BitCodeAbbrev(); 1461 Abbv->Add(BitCodeAbbrevOp(bitc::VST_CODE_ENTRY)); 1462 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8)); 1463 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array)); 1464 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Char6)); 1465 if (Stream.EmitBlockInfoAbbrev(bitc::VALUE_SYMTAB_BLOCK_ID, 1466 Abbv) != VST_ENTRY_6_ABBREV) 1467 llvm_unreachable("Unexpected abbrev ordering!"); 1468 } 1469 { // 6-bit char6 VST_BBENTRY strings. 1470 BitCodeAbbrev *Abbv = new BitCodeAbbrev(); 1471 Abbv->Add(BitCodeAbbrevOp(bitc::VST_CODE_BBENTRY)); 1472 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8)); 1473 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array)); 1474 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Char6)); 1475 if (Stream.EmitBlockInfoAbbrev(bitc::VALUE_SYMTAB_BLOCK_ID, 1476 Abbv) != VST_BBENTRY_6_ABBREV) 1477 llvm_unreachable("Unexpected abbrev ordering!"); 1478 } 1479 1480 1481 1482 { // SETTYPE abbrev for CONSTANTS_BLOCK. 1483 BitCodeAbbrev *Abbv = new BitCodeAbbrev(); 1484 Abbv->Add(BitCodeAbbrevOp(bitc::CST_CODE_SETTYPE)); 1485 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1486 Log2_32_Ceil(VE.getTypes().size()+1))); 1487 if (Stream.EmitBlockInfoAbbrev(bitc::CONSTANTS_BLOCK_ID, 1488 Abbv) != CONSTANTS_SETTYPE_ABBREV) 1489 llvm_unreachable("Unexpected abbrev ordering!"); 1490 } 1491 1492 { // INTEGER abbrev for CONSTANTS_BLOCK. 1493 BitCodeAbbrev *Abbv = new BitCodeAbbrev(); 1494 Abbv->Add(BitCodeAbbrevOp(bitc::CST_CODE_INTEGER)); 1495 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8)); 1496 if (Stream.EmitBlockInfoAbbrev(bitc::CONSTANTS_BLOCK_ID, 1497 Abbv) != CONSTANTS_INTEGER_ABBREV) 1498 llvm_unreachable("Unexpected abbrev ordering!"); 1499 } 1500 1501 { // CE_CAST abbrev for CONSTANTS_BLOCK. 1502 BitCodeAbbrev *Abbv = new BitCodeAbbrev(); 1503 Abbv->Add(BitCodeAbbrevOp(bitc::CST_CODE_CE_CAST)); 1504 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 4)); // cast opc 1505 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, // typeid 1506 Log2_32_Ceil(VE.getTypes().size()+1))); 1507 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8)); // value id 1508 1509 if (Stream.EmitBlockInfoAbbrev(bitc::CONSTANTS_BLOCK_ID, 1510 Abbv) != CONSTANTS_CE_CAST_Abbrev) 1511 llvm_unreachable("Unexpected abbrev ordering!"); 1512 } 1513 { // NULL abbrev for CONSTANTS_BLOCK. 1514 BitCodeAbbrev *Abbv = new BitCodeAbbrev(); 1515 Abbv->Add(BitCodeAbbrevOp(bitc::CST_CODE_NULL)); 1516 if (Stream.EmitBlockInfoAbbrev(bitc::CONSTANTS_BLOCK_ID, 1517 Abbv) != CONSTANTS_NULL_Abbrev) 1518 llvm_unreachable("Unexpected abbrev ordering!"); 1519 } 1520 1521 // FIXME: This should only use space for first class types! 1522 1523 { // INST_LOAD abbrev for FUNCTION_BLOCK. 1524 BitCodeAbbrev *Abbv = new BitCodeAbbrev(); 1525 Abbv->Add(BitCodeAbbrevOp(bitc::FUNC_CODE_INST_LOAD)); 1526 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Ptr 1527 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 4)); // Align 1528 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // volatile 1529 if (Stream.EmitBlockInfoAbbrev(bitc::FUNCTION_BLOCK_ID, 1530 Abbv) != FUNCTION_INST_LOAD_ABBREV) 1531 llvm_unreachable("Unexpected abbrev ordering!"); 1532 } 1533 { // INST_BINOP abbrev for FUNCTION_BLOCK. 1534 BitCodeAbbrev *Abbv = new BitCodeAbbrev(); 1535 Abbv->Add(BitCodeAbbrevOp(bitc::FUNC_CODE_INST_BINOP)); 1536 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // LHS 1537 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // RHS 1538 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 4)); // opc 1539 if (Stream.EmitBlockInfoAbbrev(bitc::FUNCTION_BLOCK_ID, 1540 Abbv) != FUNCTION_INST_BINOP_ABBREV) 1541 llvm_unreachable("Unexpected abbrev ordering!"); 1542 } 1543 { // INST_BINOP_FLAGS abbrev for FUNCTION_BLOCK. 1544 BitCodeAbbrev *Abbv = new BitCodeAbbrev(); 1545 Abbv->Add(BitCodeAbbrevOp(bitc::FUNC_CODE_INST_BINOP)); 1546 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // LHS 1547 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // RHS 1548 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 4)); // opc 1549 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 7)); // flags 1550 if (Stream.EmitBlockInfoAbbrev(bitc::FUNCTION_BLOCK_ID, 1551 Abbv) != FUNCTION_INST_BINOP_FLAGS_ABBREV) 1552 llvm_unreachable("Unexpected abbrev ordering!"); 1553 } 1554 { // INST_CAST abbrev for FUNCTION_BLOCK. 1555 BitCodeAbbrev *Abbv = new BitCodeAbbrev(); 1556 Abbv->Add(BitCodeAbbrevOp(bitc::FUNC_CODE_INST_CAST)); 1557 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // OpVal 1558 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, // dest ty 1559 Log2_32_Ceil(VE.getTypes().size()+1))); 1560 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 4)); // opc 1561 if (Stream.EmitBlockInfoAbbrev(bitc::FUNCTION_BLOCK_ID, 1562 Abbv) != FUNCTION_INST_CAST_ABBREV) 1563 llvm_unreachable("Unexpected abbrev ordering!"); 1564 } 1565 1566 { // INST_RET abbrev for FUNCTION_BLOCK. 1567 BitCodeAbbrev *Abbv = new BitCodeAbbrev(); 1568 Abbv->Add(BitCodeAbbrevOp(bitc::FUNC_CODE_INST_RET)); 1569 if (Stream.EmitBlockInfoAbbrev(bitc::FUNCTION_BLOCK_ID, 1570 Abbv) != FUNCTION_INST_RET_VOID_ABBREV) 1571 llvm_unreachable("Unexpected abbrev ordering!"); 1572 } 1573 { // INST_RET abbrev for FUNCTION_BLOCK. 1574 BitCodeAbbrev *Abbv = new BitCodeAbbrev(); 1575 Abbv->Add(BitCodeAbbrevOp(bitc::FUNC_CODE_INST_RET)); 1576 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // ValID 1577 if (Stream.EmitBlockInfoAbbrev(bitc::FUNCTION_BLOCK_ID, 1578 Abbv) != FUNCTION_INST_RET_VAL_ABBREV) 1579 llvm_unreachable("Unexpected abbrev ordering!"); 1580 } 1581 { // INST_UNREACHABLE abbrev for FUNCTION_BLOCK. 1582 BitCodeAbbrev *Abbv = new BitCodeAbbrev(); 1583 Abbv->Add(BitCodeAbbrevOp(bitc::FUNC_CODE_INST_UNREACHABLE)); 1584 if (Stream.EmitBlockInfoAbbrev(bitc::FUNCTION_BLOCK_ID, 1585 Abbv) != FUNCTION_INST_UNREACHABLE_ABBREV) 1586 llvm_unreachable("Unexpected abbrev ordering!"); 1587 } 1588 1589 Stream.ExitBlock(); 1590 } 1591 1592 1593 /// WriteModule - Emit the specified module to the bitstream. 1594 static void WriteModule(const Module *M, BitstreamWriter &Stream) { 1595 Stream.EnterSubblock(bitc::MODULE_BLOCK_ID, 3); 1596 1597 // Emit the version number if it is non-zero. 1598 if (CurVersion) { 1599 SmallVector<unsigned, 1> Vals; 1600 Vals.push_back(CurVersion); 1601 Stream.EmitRecord(bitc::MODULE_CODE_VERSION, Vals); 1602 } 1603 1604 // Analyze the module, enumerating globals, functions, etc. 1605 llvm_2_9_func::ValueEnumerator VE(M); 1606 1607 // Emit blockinfo, which defines the standard abbreviations etc. 1608 WriteBlockInfo(VE, Stream); 1609 1610 // Emit information about parameter attributes. 1611 WriteAttributeTable(VE, Stream); 1612 1613 // Emit information describing all of the types in the module. 1614 WriteTypeTable(VE, Stream); 1615 1616 // Emit top-level description of module, including target triple, inline asm, 1617 // descriptors for global variables, and function prototype info. 1618 WriteModuleInfo(M, VE, Stream); 1619 1620 // Emit constants. 1621 WriteModuleConstants(VE, Stream); 1622 1623 // Emit metadata. 1624 WriteModuleMetadata(M, VE, Stream); 1625 1626 // Emit function bodies. 1627 for (Module::const_iterator F = M->begin(), E = M->end(); F != E; ++F) 1628 if (!F->isDeclaration()) 1629 WriteFunction(*F, VE, Stream); 1630 1631 // Emit metadata. 1632 WriteModuleMetadataStore(M, Stream); 1633 1634 // Emit names for globals/functions etc. 1635 WriteValueSymbolTable(M->getValueSymbolTable(), VE, Stream); 1636 1637 Stream.ExitBlock(); 1638 } 1639 1640 /// EmitDarwinBCHeader - If generating a bc file on darwin, we have to emit a 1641 /// header and trailer to make it compatible with the system archiver. To do 1642 /// this we emit the following header, and then emit a trailer that pads the 1643 /// file out to be a multiple of 16 bytes. 1644 /// 1645 /// struct bc_header { 1646 /// uint32_t Magic; // 0x0B17C0DE 1647 /// uint32_t Version; // Version, currently always 0. 1648 /// uint32_t BitcodeOffset; // Offset to traditional bitcode file. 1649 /// uint32_t BitcodeSize; // Size of traditional bitcode file. 1650 /// uint32_t CPUType; // CPU specifier. 1651 /// ... potentially more later ... 1652 /// }; 1653 enum { 1654 DarwinBCSizeFieldOffset = 3*4, // Offset to bitcode_size. 1655 DarwinBCHeaderSize = 5*4 1656 }; 1657 1658 static void WriteInt32ToBuffer(uint32_t Value, SmallVectorImpl<char> &Buffer, 1659 uint32_t &Position) { 1660 Buffer[Position + 0] = (unsigned char) (Value >> 0); 1661 Buffer[Position + 1] = (unsigned char) (Value >> 8); 1662 Buffer[Position + 2] = (unsigned char) (Value >> 16); 1663 Buffer[Position + 3] = (unsigned char) (Value >> 24); 1664 Position += 4; 1665 } 1666 1667 static void EmitDarwinBCHeaderAndTrailer(SmallVectorImpl<char> &Buffer, 1668 const Triple &TT) { 1669 unsigned CPUType = ~0U; 1670 1671 // Match x86_64-*, i[3-9]86-*, powerpc-*, powerpc64-*, arm-*, thumb-*, 1672 // armv[0-9]-*, thumbv[0-9]-*, armv5te-*, or armv6t2-*. The CPUType is a magic 1673 // number from /usr/include/mach/machine.h. It is ok to reproduce the 1674 // specific constants here because they are implicitly part of the Darwin ABI. 1675 enum { 1676 DARWIN_CPU_ARCH_ABI64 = 0x01000000, 1677 DARWIN_CPU_TYPE_X86 = 7, 1678 DARWIN_CPU_TYPE_ARM = 12, 1679 DARWIN_CPU_TYPE_POWERPC = 18 1680 }; 1681 1682 Triple::ArchType Arch = TT.getArch(); 1683 if (Arch == Triple::x86_64) 1684 CPUType = DARWIN_CPU_TYPE_X86 | DARWIN_CPU_ARCH_ABI64; 1685 else if (Arch == Triple::x86) 1686 CPUType = DARWIN_CPU_TYPE_X86; 1687 else if (Arch == Triple::ppc) 1688 CPUType = DARWIN_CPU_TYPE_POWERPC; 1689 else if (Arch == Triple::ppc64) 1690 CPUType = DARWIN_CPU_TYPE_POWERPC | DARWIN_CPU_ARCH_ABI64; 1691 else if (Arch == Triple::arm || Arch == Triple::thumb) 1692 CPUType = DARWIN_CPU_TYPE_ARM; 1693 1694 // Traditional Bitcode starts after header. 1695 assert(Buffer.size() >= DarwinBCHeaderSize && 1696 "Expected header size to be reserved"); 1697 unsigned BCOffset = DarwinBCHeaderSize; 1698 unsigned BCSize = Buffer.size()-DarwinBCHeaderSize; 1699 1700 // Write the magic and version. 1701 unsigned Position = 0; 1702 WriteInt32ToBuffer(0x0B17C0DE , Buffer, Position); 1703 WriteInt32ToBuffer(0 , Buffer, Position); // Version. 1704 WriteInt32ToBuffer(BCOffset , Buffer, Position); 1705 WriteInt32ToBuffer(BCSize , Buffer, Position); 1706 WriteInt32ToBuffer(CPUType , Buffer, Position); 1707 1708 // If the file is not a multiple of 16 bytes, insert dummy padding. 1709 while (Buffer.size() & 15) 1710 Buffer.push_back(0); 1711 } 1712 1713 /// WriteBitcodeToFile - Write the specified module to the specified output 1714 /// stream. 1715 void llvm_2_9_func::WriteBitcodeToFile(const Module *M, raw_ostream &Out) { 1716 SmallVector<char, 1024> Buffer; 1717 Buffer.reserve(256*1024); 1718 1719 // If this is darwin or another generic macho target, reserve space for the 1720 // header. 1721 Triple TT(M->getTargetTriple()); 1722 if (TT.isOSDarwin()) 1723 Buffer.insert(Buffer.begin(), DarwinBCHeaderSize, 0); 1724 1725 // Emit the module into the buffer. 1726 { 1727 BitstreamWriter Stream(Buffer); 1728 1729 // Emit the file header. 1730 Stream.Emit((unsigned)'B', 8); 1731 Stream.Emit((unsigned)'C', 8); 1732 Stream.Emit(0x0, 4); 1733 Stream.Emit(0xC, 4); 1734 Stream.Emit(0xE, 4); 1735 Stream.Emit(0xD, 4); 1736 1737 // Emit the module. 1738 WriteModule(M, Stream); 1739 } 1740 1741 if (TT.isOSDarwin()) 1742 EmitDarwinBCHeaderAndTrailer(Buffer, TT); 1743 1744 // Write the generated bitstream to "Out". 1745 Out.write((char*)&Buffer.front(), Buffer.size()); 1746 } 1747
