BitcodeWriter.cpp revision 0444de0c0e7cfc8d8f8fed6f64cd97812bdd6a41
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 "llvm/Bitcode/BitstreamWriter.h" 16#include "llvm/Bitcode/LLVMBitCodes.h" 17#include "ValueEnumerator.h" 18#include "llvm/Constants.h" 19#include "llvm/DerivedTypes.h" 20#include "llvm/InlineAsm.h" 21#include "llvm/Instructions.h" 22#include "llvm/Module.h" 23#include "llvm/Operator.h" 24#include "llvm/ValueSymbolTable.h" 25#include "llvm/ADT/Triple.h" 26#include "llvm/Support/ErrorHandling.h" 27#include "llvm/Support/MathExtras.h" 28#include "llvm/Support/raw_ostream.h" 29#include "llvm/Support/Program.h" 30#include <cctype> 31#include <map> 32using 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. 36enum { 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 61static unsigned GetEncodedCastOpcode(unsigned Opcode) { 62 switch (Opcode) { 63 default: llvm_unreachable("Unknown cast instruction!"); 64 case Instruction::Trunc : return bitc::CAST_TRUNC; 65 case Instruction::ZExt : return bitc::CAST_ZEXT; 66 case Instruction::SExt : return bitc::CAST_SEXT; 67 case Instruction::FPToUI : return bitc::CAST_FPTOUI; 68 case Instruction::FPToSI : return bitc::CAST_FPTOSI; 69 case Instruction::UIToFP : return bitc::CAST_UITOFP; 70 case Instruction::SIToFP : return bitc::CAST_SITOFP; 71 case Instruction::FPTrunc : return bitc::CAST_FPTRUNC; 72 case Instruction::FPExt : return bitc::CAST_FPEXT; 73 case Instruction::PtrToInt: return bitc::CAST_PTRTOINT; 74 case Instruction::IntToPtr: return bitc::CAST_INTTOPTR; 75 case Instruction::BitCast : return bitc::CAST_BITCAST; 76 } 77} 78 79static unsigned GetEncodedBinaryOpcode(unsigned Opcode) { 80 switch (Opcode) { 81 default: llvm_unreachable("Unknown binary instruction!"); 82 case Instruction::Add: 83 case Instruction::FAdd: return bitc::BINOP_ADD; 84 case Instruction::Sub: 85 case Instruction::FSub: return bitc::BINOP_SUB; 86 case Instruction::Mul: 87 case Instruction::FMul: return bitc::BINOP_MUL; 88 case Instruction::UDiv: return bitc::BINOP_UDIV; 89 case Instruction::FDiv: 90 case Instruction::SDiv: return bitc::BINOP_SDIV; 91 case Instruction::URem: return bitc::BINOP_UREM; 92 case Instruction::FRem: 93 case Instruction::SRem: return bitc::BINOP_SREM; 94 case Instruction::Shl: return bitc::BINOP_SHL; 95 case Instruction::LShr: return bitc::BINOP_LSHR; 96 case Instruction::AShr: return bitc::BINOP_ASHR; 97 case Instruction::And: return bitc::BINOP_AND; 98 case Instruction::Or: return bitc::BINOP_OR; 99 case Instruction::Xor: return bitc::BINOP_XOR; 100 } 101} 102 103static unsigned GetEncodedRMWOperation(AtomicRMWInst::BinOp Op) { 104 switch (Op) { 105 default: llvm_unreachable("Unknown RMW operation!"); 106 case AtomicRMWInst::Xchg: return bitc::RMW_XCHG; 107 case AtomicRMWInst::Add: return bitc::RMW_ADD; 108 case AtomicRMWInst::Sub: return bitc::RMW_SUB; 109 case AtomicRMWInst::And: return bitc::RMW_AND; 110 case AtomicRMWInst::Nand: return bitc::RMW_NAND; 111 case AtomicRMWInst::Or: return bitc::RMW_OR; 112 case AtomicRMWInst::Xor: return bitc::RMW_XOR; 113 case AtomicRMWInst::Max: return bitc::RMW_MAX; 114 case AtomicRMWInst::Min: return bitc::RMW_MIN; 115 case AtomicRMWInst::UMax: return bitc::RMW_UMAX; 116 case AtomicRMWInst::UMin: return bitc::RMW_UMIN; 117 } 118} 119 120static unsigned GetEncodedOrdering(AtomicOrdering Ordering) { 121 switch (Ordering) { 122 default: llvm_unreachable("Unknown atomic ordering"); 123 case NotAtomic: return bitc::ORDERING_NOTATOMIC; 124 case Unordered: return bitc::ORDERING_UNORDERED; 125 case Monotonic: return bitc::ORDERING_MONOTONIC; 126 case Acquire: return bitc::ORDERING_ACQUIRE; 127 case Release: return bitc::ORDERING_RELEASE; 128 case AcquireRelease: return bitc::ORDERING_ACQREL; 129 case SequentiallyConsistent: return bitc::ORDERING_SEQCST; 130 } 131} 132 133static unsigned GetEncodedSynchScope(SynchronizationScope SynchScope) { 134 switch (SynchScope) { 135 default: llvm_unreachable("Unknown synchronization scope"); 136 case SingleThread: return bitc::SYNCHSCOPE_SINGLETHREAD; 137 case CrossThread: return bitc::SYNCHSCOPE_CROSSTHREAD; 138 } 139} 140 141static void WriteStringRecord(unsigned Code, StringRef Str, 142 unsigned AbbrevToUse, BitstreamWriter &Stream) { 143 SmallVector<unsigned, 64> Vals; 144 145 // Code: [strchar x N] 146 for (unsigned i = 0, e = Str.size(); i != e; ++i) { 147 if (AbbrevToUse && !BitCodeAbbrevOp::isChar6(Str[i])) 148 AbbrevToUse = 0; 149 Vals.push_back(Str[i]); 150 } 151 152 // Emit the finished record. 153 Stream.EmitRecord(Code, Vals, AbbrevToUse); 154} 155 156// Emit information about parameter attributes. 157static void WriteAttributeTable(const ValueEnumerator &VE, 158 BitstreamWriter &Stream) { 159 const std::vector<AttrListPtr> &Attrs = VE.getAttributes(); 160 if (Attrs.empty()) return; 161 162 Stream.EnterSubblock(bitc::PARAMATTR_BLOCK_ID, 3); 163 164 SmallVector<uint64_t, 64> Record; 165 for (unsigned i = 0, e = Attrs.size(); i != e; ++i) { 166 const AttrListPtr &A = Attrs[i]; 167 for (unsigned i = 0, e = A.getNumSlots(); i != e; ++i) { 168 const AttributeWithIndex &PAWI = A.getSlot(i); 169 Record.push_back(PAWI.Index); 170 171 // FIXME: remove in LLVM 3.0 172 // Store the alignment in the bitcode as a 16-bit raw value instead of a 173 // 5-bit log2 encoded value. Shift the bits above the alignment up by 174 // 11 bits. 175 uint64_t FauxAttr = PAWI.Attrs.Raw() & 0xffff; 176 if (PAWI.Attrs & Attribute::Alignment) 177 FauxAttr |= (1ull<<16)<< 178 (((PAWI.Attrs & Attribute::Alignment).Raw()-1) >> 16); 179 FauxAttr |= (PAWI.Attrs.Raw() & (0x3FFull << 21)) << 11; 180 181 Record.push_back(FauxAttr); 182 } 183 184 Stream.EmitRecord(bitc::PARAMATTR_CODE_ENTRY, Record); 185 Record.clear(); 186 } 187 188 Stream.ExitBlock(); 189} 190 191/// WriteTypeTable - Write out the type table for a module. 192static void WriteTypeTable(const ValueEnumerator &VE, BitstreamWriter &Stream) { 193 const ValueEnumerator::TypeList &TypeList = VE.getTypes(); 194 195 Stream.EnterSubblock(bitc::TYPE_BLOCK_ID_NEW, 4 /*count from # abbrevs */); 196 SmallVector<uint64_t, 64> TypeVals; 197 198 // Abbrev for TYPE_CODE_POINTER. 199 BitCodeAbbrev *Abbv = new BitCodeAbbrev(); 200 Abbv->Add(BitCodeAbbrevOp(bitc::TYPE_CODE_POINTER)); 201 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 202 Log2_32_Ceil(VE.getTypes().size()+1))); 203 Abbv->Add(BitCodeAbbrevOp(0)); // Addrspace = 0 204 unsigned PtrAbbrev = Stream.EmitAbbrev(Abbv); 205 206 // Abbrev for TYPE_CODE_FUNCTION. 207 Abbv = new BitCodeAbbrev(); 208 Abbv->Add(BitCodeAbbrevOp(bitc::TYPE_CODE_FUNCTION_OLD)); 209 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // isvararg 210 Abbv->Add(BitCodeAbbrevOp(0)); // FIXME: DEAD value, remove in LLVM 3.0 211 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array)); 212 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 213 Log2_32_Ceil(VE.getTypes().size()+1))); 214 unsigned FunctionAbbrev = Stream.EmitAbbrev(Abbv); 215 216 // Abbrev for TYPE_CODE_STRUCT_ANON. 217 Abbv = new BitCodeAbbrev(); 218 Abbv->Add(BitCodeAbbrevOp(bitc::TYPE_CODE_STRUCT_ANON)); 219 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // ispacked 220 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array)); 221 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 222 Log2_32_Ceil(VE.getTypes().size()+1))); 223 unsigned StructAnonAbbrev = Stream.EmitAbbrev(Abbv); 224 225 // Abbrev for TYPE_CODE_STRUCT_NAME. 226 Abbv = new BitCodeAbbrev(); 227 Abbv->Add(BitCodeAbbrevOp(bitc::TYPE_CODE_STRUCT_NAME)); 228 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array)); 229 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Char6)); 230 unsigned StructNameAbbrev = Stream.EmitAbbrev(Abbv); 231 232 // Abbrev for TYPE_CODE_STRUCT_NAMED. 233 Abbv = new BitCodeAbbrev(); 234 Abbv->Add(BitCodeAbbrevOp(bitc::TYPE_CODE_STRUCT_NAMED)); 235 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // ispacked 236 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array)); 237 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 238 Log2_32_Ceil(VE.getTypes().size()+1))); 239 unsigned StructNamedAbbrev = Stream.EmitAbbrev(Abbv); 240 241 // Abbrev for TYPE_CODE_ARRAY. 242 Abbv = new BitCodeAbbrev(); 243 Abbv->Add(BitCodeAbbrevOp(bitc::TYPE_CODE_ARRAY)); 244 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8)); // size 245 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 246 Log2_32_Ceil(VE.getTypes().size()+1))); 247 unsigned ArrayAbbrev = Stream.EmitAbbrev(Abbv); 248 249 // Emit an entry count so the reader can reserve space. 250 TypeVals.push_back(TypeList.size()); 251 Stream.EmitRecord(bitc::TYPE_CODE_NUMENTRY, TypeVals); 252 TypeVals.clear(); 253 254 // Loop over all of the types, emitting each in turn. 255 for (unsigned i = 0, e = TypeList.size(); i != e; ++i) { 256 Type *T = TypeList[i]; 257 int AbbrevToUse = 0; 258 unsigned Code = 0; 259 260 switch (T->getTypeID()) { 261 default: llvm_unreachable("Unknown type!"); 262 case Type::VoidTyID: Code = bitc::TYPE_CODE_VOID; break; 263 case Type::FloatTyID: Code = bitc::TYPE_CODE_FLOAT; break; 264 case Type::DoubleTyID: Code = bitc::TYPE_CODE_DOUBLE; break; 265 case Type::X86_FP80TyID: Code = bitc::TYPE_CODE_X86_FP80; break; 266 case Type::FP128TyID: Code = bitc::TYPE_CODE_FP128; break; 267 case Type::PPC_FP128TyID: Code = bitc::TYPE_CODE_PPC_FP128; break; 268 case Type::LabelTyID: Code = bitc::TYPE_CODE_LABEL; break; 269 case Type::MetadataTyID: Code = bitc::TYPE_CODE_METADATA; break; 270 case Type::X86_MMXTyID: Code = bitc::TYPE_CODE_X86_MMX; break; 271 case Type::IntegerTyID: 272 // INTEGER: [width] 273 Code = bitc::TYPE_CODE_INTEGER; 274 TypeVals.push_back(cast<IntegerType>(T)->getBitWidth()); 275 break; 276 case Type::PointerTyID: { 277 PointerType *PTy = cast<PointerType>(T); 278 // POINTER: [pointee type, address space] 279 Code = bitc::TYPE_CODE_POINTER; 280 TypeVals.push_back(VE.getTypeID(PTy->getElementType())); 281 unsigned AddressSpace = PTy->getAddressSpace(); 282 TypeVals.push_back(AddressSpace); 283 if (AddressSpace == 0) AbbrevToUse = PtrAbbrev; 284 break; 285 } 286 case Type::FunctionTyID: { 287 FunctionType *FT = cast<FunctionType>(T); 288 // FUNCTION: [isvararg, attrid, retty, paramty x N] 289 Code = bitc::TYPE_CODE_FUNCTION_OLD; 290 TypeVals.push_back(FT->isVarArg()); 291 TypeVals.push_back(0); // FIXME: DEAD: remove in llvm 3.0 292 TypeVals.push_back(VE.getTypeID(FT->getReturnType())); 293 for (unsigned i = 0, e = FT->getNumParams(); i != e; ++i) 294 TypeVals.push_back(VE.getTypeID(FT->getParamType(i))); 295 AbbrevToUse = FunctionAbbrev; 296 break; 297 } 298 case Type::StructTyID: { 299 StructType *ST = cast<StructType>(T); 300 // STRUCT: [ispacked, eltty x N] 301 TypeVals.push_back(ST->isPacked()); 302 // Output all of the element types. 303 for (StructType::element_iterator I = ST->element_begin(), 304 E = ST->element_end(); I != E; ++I) 305 TypeVals.push_back(VE.getTypeID(*I)); 306 307 if (ST->isLiteral()) { 308 Code = bitc::TYPE_CODE_STRUCT_ANON; 309 AbbrevToUse = StructAnonAbbrev; 310 } else { 311 if (ST->isOpaque()) { 312 Code = bitc::TYPE_CODE_OPAQUE; 313 } else { 314 Code = bitc::TYPE_CODE_STRUCT_NAMED; 315 AbbrevToUse = StructNamedAbbrev; 316 } 317 318 // Emit the name if it is present. 319 if (!ST->getName().empty()) 320 WriteStringRecord(bitc::TYPE_CODE_STRUCT_NAME, ST->getName(), 321 StructNameAbbrev, Stream); 322 } 323 break; 324 } 325 case Type::ArrayTyID: { 326 ArrayType *AT = cast<ArrayType>(T); 327 // ARRAY: [numelts, eltty] 328 Code = bitc::TYPE_CODE_ARRAY; 329 TypeVals.push_back(AT->getNumElements()); 330 TypeVals.push_back(VE.getTypeID(AT->getElementType())); 331 AbbrevToUse = ArrayAbbrev; 332 break; 333 } 334 case Type::VectorTyID: { 335 VectorType *VT = cast<VectorType>(T); 336 // VECTOR [numelts, eltty] 337 Code = bitc::TYPE_CODE_VECTOR; 338 TypeVals.push_back(VT->getNumElements()); 339 TypeVals.push_back(VE.getTypeID(VT->getElementType())); 340 break; 341 } 342 } 343 344 // Emit the finished record. 345 Stream.EmitRecord(Code, TypeVals, AbbrevToUse); 346 TypeVals.clear(); 347 } 348 349 Stream.ExitBlock(); 350} 351 352static unsigned getEncodedLinkage(const GlobalValue *GV) { 353 switch (GV->getLinkage()) { 354 default: llvm_unreachable("Invalid linkage!"); 355 case GlobalValue::ExternalLinkage: return 0; 356 case GlobalValue::WeakAnyLinkage: return 1; 357 case GlobalValue::AppendingLinkage: return 2; 358 case GlobalValue::InternalLinkage: return 3; 359 case GlobalValue::LinkOnceAnyLinkage: return 4; 360 case GlobalValue::DLLImportLinkage: return 5; 361 case GlobalValue::DLLExportLinkage: return 6; 362 case GlobalValue::ExternalWeakLinkage: return 7; 363 case GlobalValue::CommonLinkage: return 8; 364 case GlobalValue::PrivateLinkage: return 9; 365 case GlobalValue::WeakODRLinkage: return 10; 366 case GlobalValue::LinkOnceODRLinkage: return 11; 367 case GlobalValue::AvailableExternallyLinkage: return 12; 368 case GlobalValue::LinkerPrivateLinkage: return 13; 369 case GlobalValue::LinkerPrivateWeakLinkage: return 14; 370 case GlobalValue::LinkerPrivateWeakDefAutoLinkage: return 15; 371 } 372} 373 374static unsigned getEncodedVisibility(const GlobalValue *GV) { 375 switch (GV->getVisibility()) { 376 default: llvm_unreachable("Invalid visibility!"); 377 case GlobalValue::DefaultVisibility: return 0; 378 case GlobalValue::HiddenVisibility: return 1; 379 case GlobalValue::ProtectedVisibility: return 2; 380 } 381} 382 383// Emit top-level description of module, including target triple, inline asm, 384// descriptors for global variables, and function prototype info. 385static void WriteModuleInfo(const Module *M, const ValueEnumerator &VE, 386 BitstreamWriter &Stream) { 387 // Emit the list of dependent libraries for the Module. 388 for (Module::lib_iterator I = M->lib_begin(), E = M->lib_end(); I != E; ++I) 389 WriteStringRecord(bitc::MODULE_CODE_DEPLIB, *I, 0/*TODO*/, Stream); 390 391 // Emit various pieces of data attached to a module. 392 if (!M->getTargetTriple().empty()) 393 WriteStringRecord(bitc::MODULE_CODE_TRIPLE, M->getTargetTriple(), 394 0/*TODO*/, Stream); 395 if (!M->getDataLayout().empty()) 396 WriteStringRecord(bitc::MODULE_CODE_DATALAYOUT, M->getDataLayout(), 397 0/*TODO*/, Stream); 398 if (!M->getModuleInlineAsm().empty()) 399 WriteStringRecord(bitc::MODULE_CODE_ASM, M->getModuleInlineAsm(), 400 0/*TODO*/, Stream); 401 402 // Emit information about sections and GC, computing how many there are. Also 403 // compute the maximum alignment value. 404 std::map<std::string, unsigned> SectionMap; 405 std::map<std::string, unsigned> GCMap; 406 unsigned MaxAlignment = 0; 407 unsigned MaxGlobalType = 0; 408 for (Module::const_global_iterator GV = M->global_begin(),E = M->global_end(); 409 GV != E; ++GV) { 410 MaxAlignment = std::max(MaxAlignment, GV->getAlignment()); 411 MaxGlobalType = std::max(MaxGlobalType, VE.getTypeID(GV->getType())); 412 if (GV->hasSection()) { 413 // Give section names unique ID's. 414 unsigned &Entry = SectionMap[GV->getSection()]; 415 if (!Entry) { 416 WriteStringRecord(bitc::MODULE_CODE_SECTIONNAME, GV->getSection(), 417 0/*TODO*/, Stream); 418 Entry = SectionMap.size(); 419 } 420 } 421 } 422 for (Module::const_iterator F = M->begin(), E = M->end(); F != E; ++F) { 423 MaxAlignment = std::max(MaxAlignment, F->getAlignment()); 424 if (F->hasSection()) { 425 // Give section names unique ID's. 426 unsigned &Entry = SectionMap[F->getSection()]; 427 if (!Entry) { 428 WriteStringRecord(bitc::MODULE_CODE_SECTIONNAME, F->getSection(), 429 0/*TODO*/, Stream); 430 Entry = SectionMap.size(); 431 } 432 } 433 if (F->hasGC()) { 434 // Same for GC names. 435 unsigned &Entry = GCMap[F->getGC()]; 436 if (!Entry) { 437 WriteStringRecord(bitc::MODULE_CODE_GCNAME, F->getGC(), 438 0/*TODO*/, Stream); 439 Entry = GCMap.size(); 440 } 441 } 442 } 443 444 // Emit abbrev for globals, now that we know # sections and max alignment. 445 unsigned SimpleGVarAbbrev = 0; 446 if (!M->global_empty()) { 447 // Add an abbrev for common globals with no visibility or thread localness. 448 BitCodeAbbrev *Abbv = new BitCodeAbbrev(); 449 Abbv->Add(BitCodeAbbrevOp(bitc::MODULE_CODE_GLOBALVAR)); 450 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 451 Log2_32_Ceil(MaxGlobalType+1))); 452 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // Constant. 453 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Initializer. 454 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 4)); // Linkage. 455 if (MaxAlignment == 0) // Alignment. 456 Abbv->Add(BitCodeAbbrevOp(0)); 457 else { 458 unsigned MaxEncAlignment = Log2_32(MaxAlignment)+1; 459 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 460 Log2_32_Ceil(MaxEncAlignment+1))); 461 } 462 if (SectionMap.empty()) // Section. 463 Abbv->Add(BitCodeAbbrevOp(0)); 464 else 465 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 466 Log2_32_Ceil(SectionMap.size()+1))); 467 // Don't bother emitting vis + thread local. 468 SimpleGVarAbbrev = Stream.EmitAbbrev(Abbv); 469 } 470 471 // Emit the global variable information. 472 SmallVector<unsigned, 64> Vals; 473 for (Module::const_global_iterator GV = M->global_begin(),E = M->global_end(); 474 GV != E; ++GV) { 475 unsigned AbbrevToUse = 0; 476 477 // GLOBALVAR: [type, isconst, initid, 478 // linkage, alignment, section, visibility, threadlocal, 479 // unnamed_addr] 480 Vals.push_back(VE.getTypeID(GV->getType())); 481 Vals.push_back(GV->isConstant()); 482 Vals.push_back(GV->isDeclaration() ? 0 : 483 (VE.getValueID(GV->getInitializer()) + 1)); 484 Vals.push_back(getEncodedLinkage(GV)); 485 Vals.push_back(Log2_32(GV->getAlignment())+1); 486 Vals.push_back(GV->hasSection() ? SectionMap[GV->getSection()] : 0); 487 if (GV->isThreadLocal() || 488 GV->getVisibility() != GlobalValue::DefaultVisibility || 489 GV->hasUnnamedAddr()) { 490 Vals.push_back(getEncodedVisibility(GV)); 491 Vals.push_back(GV->isThreadLocal()); 492 Vals.push_back(GV->hasUnnamedAddr()); 493 } else { 494 AbbrevToUse = SimpleGVarAbbrev; 495 } 496 497 Stream.EmitRecord(bitc::MODULE_CODE_GLOBALVAR, Vals, AbbrevToUse); 498 Vals.clear(); 499 } 500 501 // Emit the function proto information. 502 for (Module::const_iterator F = M->begin(), E = M->end(); F != E; ++F) { 503 // FUNCTION: [type, callingconv, isproto, paramattr, 504 // linkage, alignment, section, visibility, gc, unnamed_addr] 505 Vals.push_back(VE.getTypeID(F->getType())); 506 Vals.push_back(F->getCallingConv()); 507 Vals.push_back(F->isDeclaration()); 508 Vals.push_back(getEncodedLinkage(F)); 509 Vals.push_back(VE.getAttributeID(F->getAttributes())); 510 Vals.push_back(Log2_32(F->getAlignment())+1); 511 Vals.push_back(F->hasSection() ? SectionMap[F->getSection()] : 0); 512 Vals.push_back(getEncodedVisibility(F)); 513 Vals.push_back(F->hasGC() ? GCMap[F->getGC()] : 0); 514 Vals.push_back(F->hasUnnamedAddr()); 515 516 unsigned AbbrevToUse = 0; 517 Stream.EmitRecord(bitc::MODULE_CODE_FUNCTION, Vals, AbbrevToUse); 518 Vals.clear(); 519 } 520 521 // Emit the alias information. 522 for (Module::const_alias_iterator AI = M->alias_begin(), E = M->alias_end(); 523 AI != E; ++AI) { 524 Vals.push_back(VE.getTypeID(AI->getType())); 525 Vals.push_back(VE.getValueID(AI->getAliasee())); 526 Vals.push_back(getEncodedLinkage(AI)); 527 Vals.push_back(getEncodedVisibility(AI)); 528 unsigned AbbrevToUse = 0; 529 Stream.EmitRecord(bitc::MODULE_CODE_ALIAS, Vals, AbbrevToUse); 530 Vals.clear(); 531 } 532} 533 534static uint64_t GetOptimizationFlags(const Value *V) { 535 uint64_t Flags = 0; 536 537 if (const OverflowingBinaryOperator *OBO = 538 dyn_cast<OverflowingBinaryOperator>(V)) { 539 if (OBO->hasNoSignedWrap()) 540 Flags |= 1 << bitc::OBO_NO_SIGNED_WRAP; 541 if (OBO->hasNoUnsignedWrap()) 542 Flags |= 1 << bitc::OBO_NO_UNSIGNED_WRAP; 543 } else if (const PossiblyExactOperator *PEO = 544 dyn_cast<PossiblyExactOperator>(V)) { 545 if (PEO->isExact()) 546 Flags |= 1 << bitc::PEO_EXACT; 547 } 548 549 return Flags; 550} 551 552static void WriteMDNode(const MDNode *N, 553 const ValueEnumerator &VE, 554 BitstreamWriter &Stream, 555 SmallVector<uint64_t, 64> &Record) { 556 for (unsigned i = 0, e = N->getNumOperands(); i != e; ++i) { 557 if (N->getOperand(i)) { 558 Record.push_back(VE.getTypeID(N->getOperand(i)->getType())); 559 Record.push_back(VE.getValueID(N->getOperand(i))); 560 } else { 561 Record.push_back(VE.getTypeID(Type::getVoidTy(N->getContext()))); 562 Record.push_back(0); 563 } 564 } 565 unsigned MDCode = N->isFunctionLocal() ? bitc::METADATA_FN_NODE : 566 bitc::METADATA_NODE; 567 Stream.EmitRecord(MDCode, Record, 0); 568 Record.clear(); 569} 570 571static void WriteModuleMetadata(const Module *M, 572 const ValueEnumerator &VE, 573 BitstreamWriter &Stream) { 574 const ValueEnumerator::ValueList &Vals = VE.getMDValues(); 575 bool StartedMetadataBlock = false; 576 unsigned MDSAbbrev = 0; 577 SmallVector<uint64_t, 64> Record; 578 for (unsigned i = 0, e = Vals.size(); i != e; ++i) { 579 580 if (const MDNode *N = dyn_cast<MDNode>(Vals[i].first)) { 581 if (!N->isFunctionLocal() || !N->getFunction()) { 582 if (!StartedMetadataBlock) { 583 Stream.EnterSubblock(bitc::METADATA_BLOCK_ID, 3); 584 StartedMetadataBlock = true; 585 } 586 WriteMDNode(N, VE, Stream, Record); 587 } 588 } else if (const MDString *MDS = dyn_cast<MDString>(Vals[i].first)) { 589 if (!StartedMetadataBlock) { 590 Stream.EnterSubblock(bitc::METADATA_BLOCK_ID, 3); 591 592 // Abbrev for METADATA_STRING. 593 BitCodeAbbrev *Abbv = new BitCodeAbbrev(); 594 Abbv->Add(BitCodeAbbrevOp(bitc::METADATA_STRING)); 595 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array)); 596 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 8)); 597 MDSAbbrev = Stream.EmitAbbrev(Abbv); 598 StartedMetadataBlock = true; 599 } 600 601 // Code: [strchar x N] 602 Record.append(MDS->begin(), MDS->end()); 603 604 // Emit the finished record. 605 Stream.EmitRecord(bitc::METADATA_STRING, Record, MDSAbbrev); 606 Record.clear(); 607 } 608 } 609 610 // Write named metadata. 611 for (Module::const_named_metadata_iterator I = M->named_metadata_begin(), 612 E = M->named_metadata_end(); I != E; ++I) { 613 const NamedMDNode *NMD = I; 614 if (!StartedMetadataBlock) { 615 Stream.EnterSubblock(bitc::METADATA_BLOCK_ID, 3); 616 StartedMetadataBlock = true; 617 } 618 619 // Write name. 620 StringRef Str = NMD->getName(); 621 for (unsigned i = 0, e = Str.size(); i != e; ++i) 622 Record.push_back(Str[i]); 623 Stream.EmitRecord(bitc::METADATA_NAME, Record, 0/*TODO*/); 624 Record.clear(); 625 626 // Write named metadata operands. 627 for (unsigned i = 0, e = NMD->getNumOperands(); i != e; ++i) 628 Record.push_back(VE.getValueID(NMD->getOperand(i))); 629 Stream.EmitRecord(bitc::METADATA_NAMED_NODE, Record, 0); 630 Record.clear(); 631 } 632 633 if (StartedMetadataBlock) 634 Stream.ExitBlock(); 635} 636 637static void WriteFunctionLocalMetadata(const Function &F, 638 const ValueEnumerator &VE, 639 BitstreamWriter &Stream) { 640 bool StartedMetadataBlock = false; 641 SmallVector<uint64_t, 64> Record; 642 const SmallVector<const MDNode *, 8> &Vals = VE.getFunctionLocalMDValues(); 643 for (unsigned i = 0, e = Vals.size(); i != e; ++i) 644 if (const MDNode *N = Vals[i]) 645 if (N->isFunctionLocal() && N->getFunction() == &F) { 646 if (!StartedMetadataBlock) { 647 Stream.EnterSubblock(bitc::METADATA_BLOCK_ID, 3); 648 StartedMetadataBlock = true; 649 } 650 WriteMDNode(N, VE, Stream, Record); 651 } 652 653 if (StartedMetadataBlock) 654 Stream.ExitBlock(); 655} 656 657static void WriteMetadataAttachment(const Function &F, 658 const ValueEnumerator &VE, 659 BitstreamWriter &Stream) { 660 Stream.EnterSubblock(bitc::METADATA_ATTACHMENT_ID, 3); 661 662 SmallVector<uint64_t, 64> Record; 663 664 // Write metadata attachments 665 // METADATA_ATTACHMENT - [m x [value, [n x [id, mdnode]]] 666 SmallVector<std::pair<unsigned, MDNode*>, 4> MDs; 667 668 for (Function::const_iterator BB = F.begin(), E = F.end(); BB != E; ++BB) 669 for (BasicBlock::const_iterator I = BB->begin(), E = BB->end(); 670 I != E; ++I) { 671 MDs.clear(); 672 I->getAllMetadataOtherThanDebugLoc(MDs); 673 674 // If no metadata, ignore instruction. 675 if (MDs.empty()) continue; 676 677 Record.push_back(VE.getInstructionID(I)); 678 679 for (unsigned i = 0, e = MDs.size(); i != e; ++i) { 680 Record.push_back(MDs[i].first); 681 Record.push_back(VE.getValueID(MDs[i].second)); 682 } 683 Stream.EmitRecord(bitc::METADATA_ATTACHMENT, Record, 0); 684 Record.clear(); 685 } 686 687 Stream.ExitBlock(); 688} 689 690static void WriteModuleMetadataStore(const Module *M, BitstreamWriter &Stream) { 691 SmallVector<uint64_t, 64> Record; 692 693 // Write metadata kinds 694 // METADATA_KIND - [n x [id, name]] 695 SmallVector<StringRef, 4> Names; 696 M->getMDKindNames(Names); 697 698 if (Names.empty()) return; 699 700 Stream.EnterSubblock(bitc::METADATA_BLOCK_ID, 3); 701 702 for (unsigned MDKindID = 0, e = Names.size(); MDKindID != e; ++MDKindID) { 703 Record.push_back(MDKindID); 704 StringRef KName = Names[MDKindID]; 705 Record.append(KName.begin(), KName.end()); 706 707 Stream.EmitRecord(bitc::METADATA_KIND, Record, 0); 708 Record.clear(); 709 } 710 711 Stream.ExitBlock(); 712} 713 714static void WriteConstants(unsigned FirstVal, unsigned LastVal, 715 const ValueEnumerator &VE, 716 BitstreamWriter &Stream, bool isGlobal) { 717 if (FirstVal == LastVal) return; 718 719 Stream.EnterSubblock(bitc::CONSTANTS_BLOCK_ID, 4); 720 721 unsigned AggregateAbbrev = 0; 722 unsigned String8Abbrev = 0; 723 unsigned CString7Abbrev = 0; 724 unsigned CString6Abbrev = 0; 725 // If this is a constant pool for the module, emit module-specific abbrevs. 726 if (isGlobal) { 727 // Abbrev for CST_CODE_AGGREGATE. 728 BitCodeAbbrev *Abbv = new BitCodeAbbrev(); 729 Abbv->Add(BitCodeAbbrevOp(bitc::CST_CODE_AGGREGATE)); 730 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array)); 731 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, Log2_32_Ceil(LastVal+1))); 732 AggregateAbbrev = Stream.EmitAbbrev(Abbv); 733 734 // Abbrev for CST_CODE_STRING. 735 Abbv = new BitCodeAbbrev(); 736 Abbv->Add(BitCodeAbbrevOp(bitc::CST_CODE_STRING)); 737 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array)); 738 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 8)); 739 String8Abbrev = Stream.EmitAbbrev(Abbv); 740 // Abbrev for CST_CODE_CSTRING. 741 Abbv = new BitCodeAbbrev(); 742 Abbv->Add(BitCodeAbbrevOp(bitc::CST_CODE_CSTRING)); 743 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array)); 744 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 7)); 745 CString7Abbrev = Stream.EmitAbbrev(Abbv); 746 // Abbrev for CST_CODE_CSTRING. 747 Abbv = new BitCodeAbbrev(); 748 Abbv->Add(BitCodeAbbrevOp(bitc::CST_CODE_CSTRING)); 749 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array)); 750 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Char6)); 751 CString6Abbrev = Stream.EmitAbbrev(Abbv); 752 } 753 754 SmallVector<uint64_t, 64> Record; 755 756 const ValueEnumerator::ValueList &Vals = VE.getValues(); 757 Type *LastTy = 0; 758 for (unsigned i = FirstVal; i != LastVal; ++i) { 759 const Value *V = Vals[i].first; 760 // If we need to switch types, do so now. 761 if (V->getType() != LastTy) { 762 LastTy = V->getType(); 763 Record.push_back(VE.getTypeID(LastTy)); 764 Stream.EmitRecord(bitc::CST_CODE_SETTYPE, Record, 765 CONSTANTS_SETTYPE_ABBREV); 766 Record.clear(); 767 } 768 769 if (const InlineAsm *IA = dyn_cast<InlineAsm>(V)) { 770 Record.push_back(unsigned(IA->hasSideEffects()) | 771 unsigned(IA->isAlignStack()) << 1); 772 773 // Add the asm string. 774 const std::string &AsmStr = IA->getAsmString(); 775 Record.push_back(AsmStr.size()); 776 for (unsigned i = 0, e = AsmStr.size(); i != e; ++i) 777 Record.push_back(AsmStr[i]); 778 779 // Add the constraint string. 780 const std::string &ConstraintStr = IA->getConstraintString(); 781 Record.push_back(ConstraintStr.size()); 782 for (unsigned i = 0, e = ConstraintStr.size(); i != e; ++i) 783 Record.push_back(ConstraintStr[i]); 784 Stream.EmitRecord(bitc::CST_CODE_INLINEASM, Record); 785 Record.clear(); 786 continue; 787 } 788 const Constant *C = cast<Constant>(V); 789 unsigned Code = -1U; 790 unsigned AbbrevToUse = 0; 791 if (C->isNullValue()) { 792 Code = bitc::CST_CODE_NULL; 793 } else if (isa<UndefValue>(C)) { 794 Code = bitc::CST_CODE_UNDEF; 795 } else if (const ConstantInt *IV = dyn_cast<ConstantInt>(C)) { 796 if (IV->getBitWidth() <= 64) { 797 uint64_t V = IV->getSExtValue(); 798 if ((int64_t)V >= 0) 799 Record.push_back(V << 1); 800 else 801 Record.push_back((-V << 1) | 1); 802 Code = bitc::CST_CODE_INTEGER; 803 AbbrevToUse = CONSTANTS_INTEGER_ABBREV; 804 } else { // Wide integers, > 64 bits in size. 805 // We have an arbitrary precision integer value to write whose 806 // bit width is > 64. However, in canonical unsigned integer 807 // format it is likely that the high bits are going to be zero. 808 // So, we only write the number of active words. 809 unsigned NWords = IV->getValue().getActiveWords(); 810 const uint64_t *RawWords = IV->getValue().getRawData(); 811 for (unsigned i = 0; i != NWords; ++i) { 812 int64_t V = RawWords[i]; 813 if (V >= 0) 814 Record.push_back(V << 1); 815 else 816 Record.push_back((-V << 1) | 1); 817 } 818 Code = bitc::CST_CODE_WIDE_INTEGER; 819 } 820 } else if (const ConstantFP *CFP = dyn_cast<ConstantFP>(C)) { 821 Code = bitc::CST_CODE_FLOAT; 822 Type *Ty = CFP->getType(); 823 if (Ty->isFloatTy() || Ty->isDoubleTy()) { 824 Record.push_back(CFP->getValueAPF().bitcastToAPInt().getZExtValue()); 825 } else if (Ty->isX86_FP80Ty()) { 826 // api needed to prevent premature destruction 827 // bits are not in the same order as a normal i80 APInt, compensate. 828 APInt api = CFP->getValueAPF().bitcastToAPInt(); 829 const uint64_t *p = api.getRawData(); 830 Record.push_back((p[1] << 48) | (p[0] >> 16)); 831 Record.push_back(p[0] & 0xffffLL); 832 } else if (Ty->isFP128Ty() || Ty->isPPC_FP128Ty()) { 833 APInt api = CFP->getValueAPF().bitcastToAPInt(); 834 const uint64_t *p = api.getRawData(); 835 Record.push_back(p[0]); 836 Record.push_back(p[1]); 837 } else { 838 assert (0 && "Unknown FP type!"); 839 } 840 } else if (isa<ConstantDataSequential>(C) && 841 cast<ConstantDataSequential>(C)->isString()) { 842 const ConstantDataSequential *Str = cast<ConstantDataSequential>(C); 843 // Emit constant strings specially. 844 unsigned NumElts = Str->getNumElements(); 845 // If this is a null-terminated string, use the denser CSTRING encoding. 846 if (Str->isCString()) { 847 Code = bitc::CST_CODE_CSTRING; 848 --NumElts; // Don't encode the null, which isn't allowed by char6. 849 } else { 850 Code = bitc::CST_CODE_STRING; 851 AbbrevToUse = String8Abbrev; 852 } 853 bool isCStr7 = Code == bitc::CST_CODE_CSTRING; 854 bool isCStrChar6 = Code == bitc::CST_CODE_CSTRING; 855 for (unsigned i = 0; i != NumElts; ++i) { 856 unsigned char V = Str->getElementAsInteger(i); 857 Record.push_back(V); 858 isCStr7 &= (V & 128) == 0; 859 if (isCStrChar6) 860 isCStrChar6 = BitCodeAbbrevOp::isChar6(V); 861 } 862 863 if (isCStrChar6) 864 AbbrevToUse = CString6Abbrev; 865 else if (isCStr7) 866 AbbrevToUse = CString7Abbrev; 867 } else if (const ConstantDataSequential *CDS = 868 dyn_cast<ConstantDataSequential>(C)) { 869 Code = bitc::CST_CODE_DATA; 870 Type *EltTy = CDS->getType()->getElementType(); 871 if (isa<IntegerType>(EltTy)) { 872 for (unsigned i = 0, e = CDS->getNumElements(); i != e; ++i) 873 Record.push_back(CDS->getElementAsInteger(i)); 874 } else if (EltTy->isFloatTy()) { 875 for (unsigned i = 0, e = CDS->getNumElements(); i != e; ++i) { 876 union { float F; uint32_t I; }; 877 F = CDS->getElementAsFloat(i); 878 Record.push_back(I); 879 } 880 } else { 881 assert(EltTy->isDoubleTy() && "Unknown ConstantData element type"); 882 for (unsigned i = 0, e = CDS->getNumElements(); i != e; ++i) { 883 union { double F; uint64_t I; }; 884 F = CDS->getElementAsDouble(i); 885 Record.push_back(I); 886 } 887 } 888 } else if (isa<ConstantArray>(C) || isa<ConstantStruct>(C) || 889 isa<ConstantVector>(C)) { 890 Code = bitc::CST_CODE_AGGREGATE; 891 for (unsigned i = 0, e = C->getNumOperands(); i != e; ++i) 892 Record.push_back(VE.getValueID(C->getOperand(i))); 893 AbbrevToUse = AggregateAbbrev; 894 } else if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(C)) { 895 switch (CE->getOpcode()) { 896 default: 897 if (Instruction::isCast(CE->getOpcode())) { 898 Code = bitc::CST_CODE_CE_CAST; 899 Record.push_back(GetEncodedCastOpcode(CE->getOpcode())); 900 Record.push_back(VE.getTypeID(C->getOperand(0)->getType())); 901 Record.push_back(VE.getValueID(C->getOperand(0))); 902 AbbrevToUse = CONSTANTS_CE_CAST_Abbrev; 903 } else { 904 assert(CE->getNumOperands() == 2 && "Unknown constant expr!"); 905 Code = bitc::CST_CODE_CE_BINOP; 906 Record.push_back(GetEncodedBinaryOpcode(CE->getOpcode())); 907 Record.push_back(VE.getValueID(C->getOperand(0))); 908 Record.push_back(VE.getValueID(C->getOperand(1))); 909 uint64_t Flags = GetOptimizationFlags(CE); 910 if (Flags != 0) 911 Record.push_back(Flags); 912 } 913 break; 914 case Instruction::GetElementPtr: 915 Code = bitc::CST_CODE_CE_GEP; 916 if (cast<GEPOperator>(C)->isInBounds()) 917 Code = bitc::CST_CODE_CE_INBOUNDS_GEP; 918 for (unsigned i = 0, e = CE->getNumOperands(); i != e; ++i) { 919 Record.push_back(VE.getTypeID(C->getOperand(i)->getType())); 920 Record.push_back(VE.getValueID(C->getOperand(i))); 921 } 922 break; 923 case Instruction::Select: 924 Code = bitc::CST_CODE_CE_SELECT; 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::ExtractElement: 930 Code = bitc::CST_CODE_CE_EXTRACTELT; 931 Record.push_back(VE.getTypeID(C->getOperand(0)->getType())); 932 Record.push_back(VE.getValueID(C->getOperand(0))); 933 Record.push_back(VE.getValueID(C->getOperand(1))); 934 break; 935 case Instruction::InsertElement: 936 Code = bitc::CST_CODE_CE_INSERTELT; 937 Record.push_back(VE.getValueID(C->getOperand(0))); 938 Record.push_back(VE.getValueID(C->getOperand(1))); 939 Record.push_back(VE.getValueID(C->getOperand(2))); 940 break; 941 case Instruction::ShuffleVector: 942 // If the return type and argument types are the same, this is a 943 // standard shufflevector instruction. If the types are different, 944 // then the shuffle is widening or truncating the input vectors, and 945 // the argument type must also be encoded. 946 if (C->getType() == C->getOperand(0)->getType()) { 947 Code = bitc::CST_CODE_CE_SHUFFLEVEC; 948 } else { 949 Code = bitc::CST_CODE_CE_SHUFVEC_EX; 950 Record.push_back(VE.getTypeID(C->getOperand(0)->getType())); 951 } 952 Record.push_back(VE.getValueID(C->getOperand(0))); 953 Record.push_back(VE.getValueID(C->getOperand(1))); 954 Record.push_back(VE.getValueID(C->getOperand(2))); 955 break; 956 case Instruction::ICmp: 957 case Instruction::FCmp: 958 Code = bitc::CST_CODE_CE_CMP; 959 Record.push_back(VE.getTypeID(C->getOperand(0)->getType())); 960 Record.push_back(VE.getValueID(C->getOperand(0))); 961 Record.push_back(VE.getValueID(C->getOperand(1))); 962 Record.push_back(CE->getPredicate()); 963 break; 964 } 965 } else if (const BlockAddress *BA = dyn_cast<BlockAddress>(C)) { 966 Code = bitc::CST_CODE_BLOCKADDRESS; 967 Record.push_back(VE.getTypeID(BA->getFunction()->getType())); 968 Record.push_back(VE.getValueID(BA->getFunction())); 969 Record.push_back(VE.getGlobalBasicBlockID(BA->getBasicBlock())); 970 } else { 971#ifndef NDEBUG 972 C->dump(); 973#endif 974 llvm_unreachable("Unknown constant!"); 975 } 976 Stream.EmitRecord(Code, Record, AbbrevToUse); 977 Record.clear(); 978 } 979 980 Stream.ExitBlock(); 981} 982 983static void WriteModuleConstants(const ValueEnumerator &VE, 984 BitstreamWriter &Stream) { 985 const ValueEnumerator::ValueList &Vals = VE.getValues(); 986 987 // Find the first constant to emit, which is the first non-globalvalue value. 988 // We know globalvalues have been emitted by WriteModuleInfo. 989 for (unsigned i = 0, e = Vals.size(); i != e; ++i) { 990 if (!isa<GlobalValue>(Vals[i].first)) { 991 WriteConstants(i, Vals.size(), VE, Stream, true); 992 return; 993 } 994 } 995} 996 997/// PushValueAndType - The file has to encode both the value and type id for 998/// many values, because we need to know what type to create for forward 999/// references. However, most operands are not forward references, so this type 1000/// field is not needed. 1001/// 1002/// This function adds V's value ID to Vals. If the value ID is higher than the 1003/// instruction ID, then it is a forward reference, and it also includes the 1004/// type ID. 1005static bool PushValueAndType(const Value *V, unsigned InstID, 1006 SmallVector<unsigned, 64> &Vals, 1007 ValueEnumerator &VE) { 1008 unsigned ValID = VE.getValueID(V); 1009 Vals.push_back(ValID); 1010 if (ValID >= InstID) { 1011 Vals.push_back(VE.getTypeID(V->getType())); 1012 return true; 1013 } 1014 return false; 1015} 1016 1017/// WriteInstruction - Emit an instruction to the specified stream. 1018static void WriteInstruction(const Instruction &I, unsigned InstID, 1019 ValueEnumerator &VE, BitstreamWriter &Stream, 1020 SmallVector<unsigned, 64> &Vals) { 1021 unsigned Code = 0; 1022 unsigned AbbrevToUse = 0; 1023 VE.setInstructionID(&I); 1024 switch (I.getOpcode()) { 1025 default: 1026 if (Instruction::isCast(I.getOpcode())) { 1027 Code = bitc::FUNC_CODE_INST_CAST; 1028 if (!PushValueAndType(I.getOperand(0), InstID, Vals, VE)) 1029 AbbrevToUse = FUNCTION_INST_CAST_ABBREV; 1030 Vals.push_back(VE.getTypeID(I.getType())); 1031 Vals.push_back(GetEncodedCastOpcode(I.getOpcode())); 1032 } else { 1033 assert(isa<BinaryOperator>(I) && "Unknown instruction!"); 1034 Code = bitc::FUNC_CODE_INST_BINOP; 1035 if (!PushValueAndType(I.getOperand(0), InstID, Vals, VE)) 1036 AbbrevToUse = FUNCTION_INST_BINOP_ABBREV; 1037 Vals.push_back(VE.getValueID(I.getOperand(1))); 1038 Vals.push_back(GetEncodedBinaryOpcode(I.getOpcode())); 1039 uint64_t Flags = GetOptimizationFlags(&I); 1040 if (Flags != 0) { 1041 if (AbbrevToUse == FUNCTION_INST_BINOP_ABBREV) 1042 AbbrevToUse = FUNCTION_INST_BINOP_FLAGS_ABBREV; 1043 Vals.push_back(Flags); 1044 } 1045 } 1046 break; 1047 1048 case Instruction::GetElementPtr: 1049 Code = bitc::FUNC_CODE_INST_GEP; 1050 if (cast<GEPOperator>(&I)->isInBounds()) 1051 Code = bitc::FUNC_CODE_INST_INBOUNDS_GEP; 1052 for (unsigned i = 0, e = I.getNumOperands(); i != e; ++i) 1053 PushValueAndType(I.getOperand(i), InstID, Vals, VE); 1054 break; 1055 case Instruction::ExtractValue: { 1056 Code = bitc::FUNC_CODE_INST_EXTRACTVAL; 1057 PushValueAndType(I.getOperand(0), InstID, Vals, VE); 1058 const ExtractValueInst *EVI = cast<ExtractValueInst>(&I); 1059 for (const unsigned *i = EVI->idx_begin(), *e = EVI->idx_end(); i != e; ++i) 1060 Vals.push_back(*i); 1061 break; 1062 } 1063 case Instruction::InsertValue: { 1064 Code = bitc::FUNC_CODE_INST_INSERTVAL; 1065 PushValueAndType(I.getOperand(0), InstID, Vals, VE); 1066 PushValueAndType(I.getOperand(1), InstID, Vals, VE); 1067 const InsertValueInst *IVI = cast<InsertValueInst>(&I); 1068 for (const unsigned *i = IVI->idx_begin(), *e = IVI->idx_end(); i != e; ++i) 1069 Vals.push_back(*i); 1070 break; 1071 } 1072 case Instruction::Select: 1073 Code = bitc::FUNC_CODE_INST_VSELECT; 1074 PushValueAndType(I.getOperand(1), InstID, Vals, VE); 1075 Vals.push_back(VE.getValueID(I.getOperand(2))); 1076 PushValueAndType(I.getOperand(0), InstID, Vals, VE); 1077 break; 1078 case Instruction::ExtractElement: 1079 Code = bitc::FUNC_CODE_INST_EXTRACTELT; 1080 PushValueAndType(I.getOperand(0), InstID, Vals, VE); 1081 Vals.push_back(VE.getValueID(I.getOperand(1))); 1082 break; 1083 case Instruction::InsertElement: 1084 Code = bitc::FUNC_CODE_INST_INSERTELT; 1085 PushValueAndType(I.getOperand(0), InstID, Vals, VE); 1086 Vals.push_back(VE.getValueID(I.getOperand(1))); 1087 Vals.push_back(VE.getValueID(I.getOperand(2))); 1088 break; 1089 case Instruction::ShuffleVector: 1090 Code = bitc::FUNC_CODE_INST_SHUFFLEVEC; 1091 PushValueAndType(I.getOperand(0), InstID, Vals, VE); 1092 Vals.push_back(VE.getValueID(I.getOperand(1))); 1093 Vals.push_back(VE.getValueID(I.getOperand(2))); 1094 break; 1095 case Instruction::ICmp: 1096 case Instruction::FCmp: 1097 // compare returning Int1Ty or vector of Int1Ty 1098 Code = bitc::FUNC_CODE_INST_CMP2; 1099 PushValueAndType(I.getOperand(0), InstID, Vals, VE); 1100 Vals.push_back(VE.getValueID(I.getOperand(1))); 1101 Vals.push_back(cast<CmpInst>(I).getPredicate()); 1102 break; 1103 1104 case Instruction::Ret: 1105 { 1106 Code = bitc::FUNC_CODE_INST_RET; 1107 unsigned NumOperands = I.getNumOperands(); 1108 if (NumOperands == 0) 1109 AbbrevToUse = FUNCTION_INST_RET_VOID_ABBREV; 1110 else if (NumOperands == 1) { 1111 if (!PushValueAndType(I.getOperand(0), InstID, Vals, VE)) 1112 AbbrevToUse = FUNCTION_INST_RET_VAL_ABBREV; 1113 } else { 1114 for (unsigned i = 0, e = NumOperands; i != e; ++i) 1115 PushValueAndType(I.getOperand(i), InstID, Vals, VE); 1116 } 1117 } 1118 break; 1119 case Instruction::Br: 1120 { 1121 Code = bitc::FUNC_CODE_INST_BR; 1122 BranchInst &II = cast<BranchInst>(I); 1123 Vals.push_back(VE.getValueID(II.getSuccessor(0))); 1124 if (II.isConditional()) { 1125 Vals.push_back(VE.getValueID(II.getSuccessor(1))); 1126 Vals.push_back(VE.getValueID(II.getCondition())); 1127 } 1128 } 1129 break; 1130 case Instruction::Switch: 1131 Code = bitc::FUNC_CODE_INST_SWITCH; 1132 Vals.push_back(VE.getTypeID(I.getOperand(0)->getType())); 1133 for (unsigned i = 0, e = I.getNumOperands(); i != e; ++i) 1134 Vals.push_back(VE.getValueID(I.getOperand(i))); 1135 break; 1136 case Instruction::IndirectBr: 1137 Code = bitc::FUNC_CODE_INST_INDIRECTBR; 1138 Vals.push_back(VE.getTypeID(I.getOperand(0)->getType())); 1139 for (unsigned i = 0, e = I.getNumOperands(); i != e; ++i) 1140 Vals.push_back(VE.getValueID(I.getOperand(i))); 1141 break; 1142 1143 case Instruction::Invoke: { 1144 const InvokeInst *II = cast<InvokeInst>(&I); 1145 const Value *Callee(II->getCalledValue()); 1146 PointerType *PTy = cast<PointerType>(Callee->getType()); 1147 FunctionType *FTy = cast<FunctionType>(PTy->getElementType()); 1148 Code = bitc::FUNC_CODE_INST_INVOKE; 1149 1150 Vals.push_back(VE.getAttributeID(II->getAttributes())); 1151 Vals.push_back(II->getCallingConv()); 1152 Vals.push_back(VE.getValueID(II->getNormalDest())); 1153 Vals.push_back(VE.getValueID(II->getUnwindDest())); 1154 PushValueAndType(Callee, InstID, Vals, VE); 1155 1156 // Emit value #'s for the fixed parameters. 1157 for (unsigned i = 0, e = FTy->getNumParams(); i != e; ++i) 1158 Vals.push_back(VE.getValueID(I.getOperand(i))); // fixed param. 1159 1160 // Emit type/value pairs for varargs params. 1161 if (FTy->isVarArg()) { 1162 for (unsigned i = FTy->getNumParams(), e = I.getNumOperands()-3; 1163 i != e; ++i) 1164 PushValueAndType(I.getOperand(i), InstID, Vals, VE); // vararg 1165 } 1166 break; 1167 } 1168 case Instruction::Resume: 1169 Code = bitc::FUNC_CODE_INST_RESUME; 1170 PushValueAndType(I.getOperand(0), InstID, Vals, VE); 1171 break; 1172 case Instruction::Unreachable: 1173 Code = bitc::FUNC_CODE_INST_UNREACHABLE; 1174 AbbrevToUse = FUNCTION_INST_UNREACHABLE_ABBREV; 1175 break; 1176 1177 case Instruction::PHI: { 1178 const PHINode &PN = cast<PHINode>(I); 1179 Code = bitc::FUNC_CODE_INST_PHI; 1180 Vals.push_back(VE.getTypeID(PN.getType())); 1181 for (unsigned i = 0, e = PN.getNumIncomingValues(); i != e; ++i) { 1182 Vals.push_back(VE.getValueID(PN.getIncomingValue(i))); 1183 Vals.push_back(VE.getValueID(PN.getIncomingBlock(i))); 1184 } 1185 break; 1186 } 1187 1188 case Instruction::LandingPad: { 1189 const LandingPadInst &LP = cast<LandingPadInst>(I); 1190 Code = bitc::FUNC_CODE_INST_LANDINGPAD; 1191 Vals.push_back(VE.getTypeID(LP.getType())); 1192 PushValueAndType(LP.getPersonalityFn(), InstID, Vals, VE); 1193 Vals.push_back(LP.isCleanup()); 1194 Vals.push_back(LP.getNumClauses()); 1195 for (unsigned I = 0, E = LP.getNumClauses(); I != E; ++I) { 1196 if (LP.isCatch(I)) 1197 Vals.push_back(LandingPadInst::Catch); 1198 else 1199 Vals.push_back(LandingPadInst::Filter); 1200 PushValueAndType(LP.getClause(I), InstID, Vals, VE); 1201 } 1202 break; 1203 } 1204 1205 case Instruction::Alloca: 1206 Code = bitc::FUNC_CODE_INST_ALLOCA; 1207 Vals.push_back(VE.getTypeID(I.getType())); 1208 Vals.push_back(VE.getTypeID(I.getOperand(0)->getType())); 1209 Vals.push_back(VE.getValueID(I.getOperand(0))); // size. 1210 Vals.push_back(Log2_32(cast<AllocaInst>(I).getAlignment())+1); 1211 break; 1212 1213 case Instruction::Load: 1214 if (cast<LoadInst>(I).isAtomic()) { 1215 Code = bitc::FUNC_CODE_INST_LOADATOMIC; 1216 PushValueAndType(I.getOperand(0), InstID, Vals, VE); 1217 } else { 1218 Code = bitc::FUNC_CODE_INST_LOAD; 1219 if (!PushValueAndType(I.getOperand(0), InstID, Vals, VE)) // ptr 1220 AbbrevToUse = FUNCTION_INST_LOAD_ABBREV; 1221 } 1222 Vals.push_back(Log2_32(cast<LoadInst>(I).getAlignment())+1); 1223 Vals.push_back(cast<LoadInst>(I).isVolatile()); 1224 if (cast<LoadInst>(I).isAtomic()) { 1225 Vals.push_back(GetEncodedOrdering(cast<LoadInst>(I).getOrdering())); 1226 Vals.push_back(GetEncodedSynchScope(cast<LoadInst>(I).getSynchScope())); 1227 } 1228 break; 1229 case Instruction::Store: 1230 if (cast<StoreInst>(I).isAtomic()) 1231 Code = bitc::FUNC_CODE_INST_STOREATOMIC; 1232 else 1233 Code = bitc::FUNC_CODE_INST_STORE; 1234 PushValueAndType(I.getOperand(1), InstID, Vals, VE); // ptrty + ptr 1235 Vals.push_back(VE.getValueID(I.getOperand(0))); // val. 1236 Vals.push_back(Log2_32(cast<StoreInst>(I).getAlignment())+1); 1237 Vals.push_back(cast<StoreInst>(I).isVolatile()); 1238 if (cast<StoreInst>(I).isAtomic()) { 1239 Vals.push_back(GetEncodedOrdering(cast<StoreInst>(I).getOrdering())); 1240 Vals.push_back(GetEncodedSynchScope(cast<StoreInst>(I).getSynchScope())); 1241 } 1242 break; 1243 case Instruction::AtomicCmpXchg: 1244 Code = bitc::FUNC_CODE_INST_CMPXCHG; 1245 PushValueAndType(I.getOperand(0), InstID, Vals, VE); // ptrty + ptr 1246 Vals.push_back(VE.getValueID(I.getOperand(1))); // cmp. 1247 Vals.push_back(VE.getValueID(I.getOperand(2))); // newval. 1248 Vals.push_back(cast<AtomicCmpXchgInst>(I).isVolatile()); 1249 Vals.push_back(GetEncodedOrdering( 1250 cast<AtomicCmpXchgInst>(I).getOrdering())); 1251 Vals.push_back(GetEncodedSynchScope( 1252 cast<AtomicCmpXchgInst>(I).getSynchScope())); 1253 break; 1254 case Instruction::AtomicRMW: 1255 Code = bitc::FUNC_CODE_INST_ATOMICRMW; 1256 PushValueAndType(I.getOperand(0), InstID, Vals, VE); // ptrty + ptr 1257 Vals.push_back(VE.getValueID(I.getOperand(1))); // val. 1258 Vals.push_back(GetEncodedRMWOperation( 1259 cast<AtomicRMWInst>(I).getOperation())); 1260 Vals.push_back(cast<AtomicRMWInst>(I).isVolatile()); 1261 Vals.push_back(GetEncodedOrdering(cast<AtomicRMWInst>(I).getOrdering())); 1262 Vals.push_back(GetEncodedSynchScope( 1263 cast<AtomicRMWInst>(I).getSynchScope())); 1264 break; 1265 case Instruction::Fence: 1266 Code = bitc::FUNC_CODE_INST_FENCE; 1267 Vals.push_back(GetEncodedOrdering(cast<FenceInst>(I).getOrdering())); 1268 Vals.push_back(GetEncodedSynchScope(cast<FenceInst>(I).getSynchScope())); 1269 break; 1270 case Instruction::Call: { 1271 const CallInst &CI = cast<CallInst>(I); 1272 PointerType *PTy = cast<PointerType>(CI.getCalledValue()->getType()); 1273 FunctionType *FTy = cast<FunctionType>(PTy->getElementType()); 1274 1275 Code = bitc::FUNC_CODE_INST_CALL; 1276 1277 Vals.push_back(VE.getAttributeID(CI.getAttributes())); 1278 Vals.push_back((CI.getCallingConv() << 1) | unsigned(CI.isTailCall())); 1279 PushValueAndType(CI.getCalledValue(), InstID, Vals, VE); // Callee 1280 1281 // Emit value #'s for the fixed parameters. 1282 for (unsigned i = 0, e = FTy->getNumParams(); i != e; ++i) 1283 Vals.push_back(VE.getValueID(CI.getArgOperand(i))); // fixed param. 1284 1285 // Emit type/value pairs for varargs params. 1286 if (FTy->isVarArg()) { 1287 for (unsigned i = FTy->getNumParams(), e = CI.getNumArgOperands(); 1288 i != e; ++i) 1289 PushValueAndType(CI.getArgOperand(i), InstID, Vals, VE); // varargs 1290 } 1291 break; 1292 } 1293 case Instruction::VAArg: 1294 Code = bitc::FUNC_CODE_INST_VAARG; 1295 Vals.push_back(VE.getTypeID(I.getOperand(0)->getType())); // valistty 1296 Vals.push_back(VE.getValueID(I.getOperand(0))); // valist. 1297 Vals.push_back(VE.getTypeID(I.getType())); // restype. 1298 break; 1299 } 1300 1301 Stream.EmitRecord(Code, Vals, AbbrevToUse); 1302 Vals.clear(); 1303} 1304 1305// Emit names for globals/functions etc. 1306static void WriteValueSymbolTable(const ValueSymbolTable &VST, 1307 const ValueEnumerator &VE, 1308 BitstreamWriter &Stream) { 1309 if (VST.empty()) return; 1310 Stream.EnterSubblock(bitc::VALUE_SYMTAB_BLOCK_ID, 4); 1311 1312 // FIXME: Set up the abbrev, we know how many values there are! 1313 // FIXME: We know if the type names can use 7-bit ascii. 1314 SmallVector<unsigned, 64> NameVals; 1315 1316 for (ValueSymbolTable::const_iterator SI = VST.begin(), SE = VST.end(); 1317 SI != SE; ++SI) { 1318 1319 const ValueName &Name = *SI; 1320 1321 // Figure out the encoding to use for the name. 1322 bool is7Bit = true; 1323 bool isChar6 = true; 1324 for (const char *C = Name.getKeyData(), *E = C+Name.getKeyLength(); 1325 C != E; ++C) { 1326 if (isChar6) 1327 isChar6 = BitCodeAbbrevOp::isChar6(*C); 1328 if ((unsigned char)*C & 128) { 1329 is7Bit = false; 1330 break; // don't bother scanning the rest. 1331 } 1332 } 1333 1334 unsigned AbbrevToUse = VST_ENTRY_8_ABBREV; 1335 1336 // VST_ENTRY: [valueid, namechar x N] 1337 // VST_BBENTRY: [bbid, namechar x N] 1338 unsigned Code; 1339 if (isa<BasicBlock>(SI->getValue())) { 1340 Code = bitc::VST_CODE_BBENTRY; 1341 if (isChar6) 1342 AbbrevToUse = VST_BBENTRY_6_ABBREV; 1343 } else { 1344 Code = bitc::VST_CODE_ENTRY; 1345 if (isChar6) 1346 AbbrevToUse = VST_ENTRY_6_ABBREV; 1347 else if (is7Bit) 1348 AbbrevToUse = VST_ENTRY_7_ABBREV; 1349 } 1350 1351 NameVals.push_back(VE.getValueID(SI->getValue())); 1352 for (const char *P = Name.getKeyData(), 1353 *E = Name.getKeyData()+Name.getKeyLength(); P != E; ++P) 1354 NameVals.push_back((unsigned char)*P); 1355 1356 // Emit the finished record. 1357 Stream.EmitRecord(Code, NameVals, AbbrevToUse); 1358 NameVals.clear(); 1359 } 1360 Stream.ExitBlock(); 1361} 1362 1363/// WriteFunction - Emit a function body to the module stream. 1364static void WriteFunction(const Function &F, ValueEnumerator &VE, 1365 BitstreamWriter &Stream) { 1366 Stream.EnterSubblock(bitc::FUNCTION_BLOCK_ID, 4); 1367 VE.incorporateFunction(F); 1368 1369 SmallVector<unsigned, 64> Vals; 1370 1371 // Emit the number of basic blocks, so the reader can create them ahead of 1372 // time. 1373 Vals.push_back(VE.getBasicBlocks().size()); 1374 Stream.EmitRecord(bitc::FUNC_CODE_DECLAREBLOCKS, Vals); 1375 Vals.clear(); 1376 1377 // If there are function-local constants, emit them now. 1378 unsigned CstStart, CstEnd; 1379 VE.getFunctionConstantRange(CstStart, CstEnd); 1380 WriteConstants(CstStart, CstEnd, VE, Stream, false); 1381 1382 // If there is function-local metadata, emit it now. 1383 WriteFunctionLocalMetadata(F, VE, Stream); 1384 1385 // Keep a running idea of what the instruction ID is. 1386 unsigned InstID = CstEnd; 1387 1388 bool NeedsMetadataAttachment = false; 1389 1390 DebugLoc LastDL; 1391 1392 // Finally, emit all the instructions, in order. 1393 for (Function::const_iterator BB = F.begin(), E = F.end(); BB != E; ++BB) 1394 for (BasicBlock::const_iterator I = BB->begin(), E = BB->end(); 1395 I != E; ++I) { 1396 WriteInstruction(*I, InstID, VE, Stream, Vals); 1397 1398 if (!I->getType()->isVoidTy()) 1399 ++InstID; 1400 1401 // If the instruction has metadata, write a metadata attachment later. 1402 NeedsMetadataAttachment |= I->hasMetadataOtherThanDebugLoc(); 1403 1404 // If the instruction has a debug location, emit it. 1405 DebugLoc DL = I->getDebugLoc(); 1406 if (DL.isUnknown()) { 1407 // nothing todo. 1408 } else if (DL == LastDL) { 1409 // Just repeat the same debug loc as last time. 1410 Stream.EmitRecord(bitc::FUNC_CODE_DEBUG_LOC_AGAIN, Vals); 1411 } else { 1412 MDNode *Scope, *IA; 1413 DL.getScopeAndInlinedAt(Scope, IA, I->getContext()); 1414 1415 Vals.push_back(DL.getLine()); 1416 Vals.push_back(DL.getCol()); 1417 Vals.push_back(Scope ? VE.getValueID(Scope)+1 : 0); 1418 Vals.push_back(IA ? VE.getValueID(IA)+1 : 0); 1419 Stream.EmitRecord(bitc::FUNC_CODE_DEBUG_LOC, Vals); 1420 Vals.clear(); 1421 1422 LastDL = DL; 1423 } 1424 } 1425 1426 // Emit names for all the instructions etc. 1427 WriteValueSymbolTable(F.getValueSymbolTable(), VE, Stream); 1428 1429 if (NeedsMetadataAttachment) 1430 WriteMetadataAttachment(F, VE, Stream); 1431 VE.purgeFunction(); 1432 Stream.ExitBlock(); 1433} 1434 1435// Emit blockinfo, which defines the standard abbreviations etc. 1436static void WriteBlockInfo(const ValueEnumerator &VE, BitstreamWriter &Stream) { 1437 // We only want to emit block info records for blocks that have multiple 1438 // instances: CONSTANTS_BLOCK, FUNCTION_BLOCK and VALUE_SYMTAB_BLOCK. Other 1439 // blocks can defined their abbrevs inline. 1440 Stream.EnterBlockInfoBlock(2); 1441 1442 { // 8-bit fixed-width VST_ENTRY/VST_BBENTRY strings. 1443 BitCodeAbbrev *Abbv = new BitCodeAbbrev(); 1444 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 3)); 1445 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8)); 1446 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array)); 1447 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 8)); 1448 if (Stream.EmitBlockInfoAbbrev(bitc::VALUE_SYMTAB_BLOCK_ID, 1449 Abbv) != VST_ENTRY_8_ABBREV) 1450 llvm_unreachable("Unexpected abbrev ordering!"); 1451 } 1452 1453 { // 7-bit fixed width VST_ENTRY strings. 1454 BitCodeAbbrev *Abbv = new BitCodeAbbrev(); 1455 Abbv->Add(BitCodeAbbrevOp(bitc::VST_CODE_ENTRY)); 1456 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8)); 1457 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array)); 1458 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 7)); 1459 if (Stream.EmitBlockInfoAbbrev(bitc::VALUE_SYMTAB_BLOCK_ID, 1460 Abbv) != VST_ENTRY_7_ABBREV) 1461 llvm_unreachable("Unexpected abbrev ordering!"); 1462 } 1463 { // 6-bit char6 VST_ENTRY strings. 1464 BitCodeAbbrev *Abbv = new BitCodeAbbrev(); 1465 Abbv->Add(BitCodeAbbrevOp(bitc::VST_CODE_ENTRY)); 1466 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8)); 1467 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array)); 1468 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Char6)); 1469 if (Stream.EmitBlockInfoAbbrev(bitc::VALUE_SYMTAB_BLOCK_ID, 1470 Abbv) != VST_ENTRY_6_ABBREV) 1471 llvm_unreachable("Unexpected abbrev ordering!"); 1472 } 1473 { // 6-bit char6 VST_BBENTRY strings. 1474 BitCodeAbbrev *Abbv = new BitCodeAbbrev(); 1475 Abbv->Add(BitCodeAbbrevOp(bitc::VST_CODE_BBENTRY)); 1476 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8)); 1477 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array)); 1478 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Char6)); 1479 if (Stream.EmitBlockInfoAbbrev(bitc::VALUE_SYMTAB_BLOCK_ID, 1480 Abbv) != VST_BBENTRY_6_ABBREV) 1481 llvm_unreachable("Unexpected abbrev ordering!"); 1482 } 1483 1484 1485 1486 { // SETTYPE abbrev for CONSTANTS_BLOCK. 1487 BitCodeAbbrev *Abbv = new BitCodeAbbrev(); 1488 Abbv->Add(BitCodeAbbrevOp(bitc::CST_CODE_SETTYPE)); 1489 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1490 Log2_32_Ceil(VE.getTypes().size()+1))); 1491 if (Stream.EmitBlockInfoAbbrev(bitc::CONSTANTS_BLOCK_ID, 1492 Abbv) != CONSTANTS_SETTYPE_ABBREV) 1493 llvm_unreachable("Unexpected abbrev ordering!"); 1494 } 1495 1496 { // INTEGER abbrev for CONSTANTS_BLOCK. 1497 BitCodeAbbrev *Abbv = new BitCodeAbbrev(); 1498 Abbv->Add(BitCodeAbbrevOp(bitc::CST_CODE_INTEGER)); 1499 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8)); 1500 if (Stream.EmitBlockInfoAbbrev(bitc::CONSTANTS_BLOCK_ID, 1501 Abbv) != CONSTANTS_INTEGER_ABBREV) 1502 llvm_unreachable("Unexpected abbrev ordering!"); 1503 } 1504 1505 { // CE_CAST abbrev for CONSTANTS_BLOCK. 1506 BitCodeAbbrev *Abbv = new BitCodeAbbrev(); 1507 Abbv->Add(BitCodeAbbrevOp(bitc::CST_CODE_CE_CAST)); 1508 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 4)); // cast opc 1509 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, // typeid 1510 Log2_32_Ceil(VE.getTypes().size()+1))); 1511 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8)); // value id 1512 1513 if (Stream.EmitBlockInfoAbbrev(bitc::CONSTANTS_BLOCK_ID, 1514 Abbv) != CONSTANTS_CE_CAST_Abbrev) 1515 llvm_unreachable("Unexpected abbrev ordering!"); 1516 } 1517 { // NULL abbrev for CONSTANTS_BLOCK. 1518 BitCodeAbbrev *Abbv = new BitCodeAbbrev(); 1519 Abbv->Add(BitCodeAbbrevOp(bitc::CST_CODE_NULL)); 1520 if (Stream.EmitBlockInfoAbbrev(bitc::CONSTANTS_BLOCK_ID, 1521 Abbv) != CONSTANTS_NULL_Abbrev) 1522 llvm_unreachable("Unexpected abbrev ordering!"); 1523 } 1524 1525 // FIXME: This should only use space for first class types! 1526 1527 { // INST_LOAD abbrev for FUNCTION_BLOCK. 1528 BitCodeAbbrev *Abbv = new BitCodeAbbrev(); 1529 Abbv->Add(BitCodeAbbrevOp(bitc::FUNC_CODE_INST_LOAD)); 1530 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Ptr 1531 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 4)); // Align 1532 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // volatile 1533 if (Stream.EmitBlockInfoAbbrev(bitc::FUNCTION_BLOCK_ID, 1534 Abbv) != FUNCTION_INST_LOAD_ABBREV) 1535 llvm_unreachable("Unexpected abbrev ordering!"); 1536 } 1537 { // INST_BINOP abbrev for FUNCTION_BLOCK. 1538 BitCodeAbbrev *Abbv = new BitCodeAbbrev(); 1539 Abbv->Add(BitCodeAbbrevOp(bitc::FUNC_CODE_INST_BINOP)); 1540 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // LHS 1541 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // RHS 1542 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 4)); // opc 1543 if (Stream.EmitBlockInfoAbbrev(bitc::FUNCTION_BLOCK_ID, 1544 Abbv) != FUNCTION_INST_BINOP_ABBREV) 1545 llvm_unreachable("Unexpected abbrev ordering!"); 1546 } 1547 { // INST_BINOP_FLAGS abbrev for FUNCTION_BLOCK. 1548 BitCodeAbbrev *Abbv = new BitCodeAbbrev(); 1549 Abbv->Add(BitCodeAbbrevOp(bitc::FUNC_CODE_INST_BINOP)); 1550 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // LHS 1551 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // RHS 1552 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 4)); // opc 1553 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 7)); // flags 1554 if (Stream.EmitBlockInfoAbbrev(bitc::FUNCTION_BLOCK_ID, 1555 Abbv) != FUNCTION_INST_BINOP_FLAGS_ABBREV) 1556 llvm_unreachable("Unexpected abbrev ordering!"); 1557 } 1558 { // INST_CAST abbrev for FUNCTION_BLOCK. 1559 BitCodeAbbrev *Abbv = new BitCodeAbbrev(); 1560 Abbv->Add(BitCodeAbbrevOp(bitc::FUNC_CODE_INST_CAST)); 1561 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // OpVal 1562 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, // dest ty 1563 Log2_32_Ceil(VE.getTypes().size()+1))); 1564 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 4)); // opc 1565 if (Stream.EmitBlockInfoAbbrev(bitc::FUNCTION_BLOCK_ID, 1566 Abbv) != FUNCTION_INST_CAST_ABBREV) 1567 llvm_unreachable("Unexpected abbrev ordering!"); 1568 } 1569 1570 { // INST_RET abbrev for FUNCTION_BLOCK. 1571 BitCodeAbbrev *Abbv = new BitCodeAbbrev(); 1572 Abbv->Add(BitCodeAbbrevOp(bitc::FUNC_CODE_INST_RET)); 1573 if (Stream.EmitBlockInfoAbbrev(bitc::FUNCTION_BLOCK_ID, 1574 Abbv) != FUNCTION_INST_RET_VOID_ABBREV) 1575 llvm_unreachable("Unexpected abbrev ordering!"); 1576 } 1577 { // INST_RET abbrev for FUNCTION_BLOCK. 1578 BitCodeAbbrev *Abbv = new BitCodeAbbrev(); 1579 Abbv->Add(BitCodeAbbrevOp(bitc::FUNC_CODE_INST_RET)); 1580 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // ValID 1581 if (Stream.EmitBlockInfoAbbrev(bitc::FUNCTION_BLOCK_ID, 1582 Abbv) != FUNCTION_INST_RET_VAL_ABBREV) 1583 llvm_unreachable("Unexpected abbrev ordering!"); 1584 } 1585 { // INST_UNREACHABLE abbrev for FUNCTION_BLOCK. 1586 BitCodeAbbrev *Abbv = new BitCodeAbbrev(); 1587 Abbv->Add(BitCodeAbbrevOp(bitc::FUNC_CODE_INST_UNREACHABLE)); 1588 if (Stream.EmitBlockInfoAbbrev(bitc::FUNCTION_BLOCK_ID, 1589 Abbv) != FUNCTION_INST_UNREACHABLE_ABBREV) 1590 llvm_unreachable("Unexpected abbrev ordering!"); 1591 } 1592 1593 Stream.ExitBlock(); 1594} 1595 1596 1597/// WriteModule - Emit the specified module to the bitstream. 1598static void WriteModule(const Module *M, BitstreamWriter &Stream) { 1599 Stream.EnterSubblock(bitc::MODULE_BLOCK_ID, 3); 1600 1601 // Emit the version number if it is non-zero. 1602 if (CurVersion) { 1603 SmallVector<unsigned, 1> Vals; 1604 Vals.push_back(CurVersion); 1605 Stream.EmitRecord(bitc::MODULE_CODE_VERSION, Vals); 1606 } 1607 1608 // Analyze the module, enumerating globals, functions, etc. 1609 ValueEnumerator VE(M); 1610 1611 // Emit blockinfo, which defines the standard abbreviations etc. 1612 WriteBlockInfo(VE, Stream); 1613 1614 // Emit information about parameter attributes. 1615 WriteAttributeTable(VE, Stream); 1616 1617 // Emit information describing all of the types in the module. 1618 WriteTypeTable(VE, Stream); 1619 1620 // Emit top-level description of module, including target triple, inline asm, 1621 // descriptors for global variables, and function prototype info. 1622 WriteModuleInfo(M, VE, Stream); 1623 1624 // Emit constants. 1625 WriteModuleConstants(VE, Stream); 1626 1627 // Emit metadata. 1628 WriteModuleMetadata(M, VE, Stream); 1629 1630 // Emit function bodies. 1631 for (Module::const_iterator F = M->begin(), E = M->end(); F != E; ++F) 1632 if (!F->isDeclaration()) 1633 WriteFunction(*F, VE, Stream); 1634 1635 // Emit metadata. 1636 WriteModuleMetadataStore(M, Stream); 1637 1638 // Emit names for globals/functions etc. 1639 WriteValueSymbolTable(M->getValueSymbolTable(), VE, Stream); 1640 1641 Stream.ExitBlock(); 1642} 1643 1644/// EmitDarwinBCHeader - If generating a bc file on darwin, we have to emit a 1645/// header and trailer to make it compatible with the system archiver. To do 1646/// this we emit the following header, and then emit a trailer that pads the 1647/// file out to be a multiple of 16 bytes. 1648/// 1649/// struct bc_header { 1650/// uint32_t Magic; // 0x0B17C0DE 1651/// uint32_t Version; // Version, currently always 0. 1652/// uint32_t BitcodeOffset; // Offset to traditional bitcode file. 1653/// uint32_t BitcodeSize; // Size of traditional bitcode file. 1654/// uint32_t CPUType; // CPU specifier. 1655/// ... potentially more later ... 1656/// }; 1657enum { 1658 DarwinBCSizeFieldOffset = 3*4, // Offset to bitcode_size. 1659 DarwinBCHeaderSize = 5*4 1660}; 1661 1662static void WriteInt32ToBuffer(uint32_t Value, SmallVectorImpl<char> &Buffer, 1663 uint32_t &Position) { 1664 Buffer[Position + 0] = (unsigned char) (Value >> 0); 1665 Buffer[Position + 1] = (unsigned char) (Value >> 8); 1666 Buffer[Position + 2] = (unsigned char) (Value >> 16); 1667 Buffer[Position + 3] = (unsigned char) (Value >> 24); 1668 Position += 4; 1669} 1670 1671static void EmitDarwinBCHeaderAndTrailer(SmallVectorImpl<char> &Buffer, 1672 const Triple &TT) { 1673 unsigned CPUType = ~0U; 1674 1675 // Match x86_64-*, i[3-9]86-*, powerpc-*, powerpc64-*, arm-*, thumb-*, 1676 // armv[0-9]-*, thumbv[0-9]-*, armv5te-*, or armv6t2-*. The CPUType is a magic 1677 // number from /usr/include/mach/machine.h. It is ok to reproduce the 1678 // specific constants here because they are implicitly part of the Darwin ABI. 1679 enum { 1680 DARWIN_CPU_ARCH_ABI64 = 0x01000000, 1681 DARWIN_CPU_TYPE_X86 = 7, 1682 DARWIN_CPU_TYPE_ARM = 12, 1683 DARWIN_CPU_TYPE_POWERPC = 18 1684 }; 1685 1686 Triple::ArchType Arch = TT.getArch(); 1687 if (Arch == Triple::x86_64) 1688 CPUType = DARWIN_CPU_TYPE_X86 | DARWIN_CPU_ARCH_ABI64; 1689 else if (Arch == Triple::x86) 1690 CPUType = DARWIN_CPU_TYPE_X86; 1691 else if (Arch == Triple::ppc) 1692 CPUType = DARWIN_CPU_TYPE_POWERPC; 1693 else if (Arch == Triple::ppc64) 1694 CPUType = DARWIN_CPU_TYPE_POWERPC | DARWIN_CPU_ARCH_ABI64; 1695 else if (Arch == Triple::arm || Arch == Triple::thumb) 1696 CPUType = DARWIN_CPU_TYPE_ARM; 1697 1698 // Traditional Bitcode starts after header. 1699 assert(Buffer.size() >= DarwinBCHeaderSize && 1700 "Expected header size to be reserved"); 1701 unsigned BCOffset = DarwinBCHeaderSize; 1702 unsigned BCSize = Buffer.size()-DarwinBCHeaderSize; 1703 1704 // Write the magic and version. 1705 unsigned Position = 0; 1706 WriteInt32ToBuffer(0x0B17C0DE , Buffer, Position); 1707 WriteInt32ToBuffer(0 , Buffer, Position); // Version. 1708 WriteInt32ToBuffer(BCOffset , Buffer, Position); 1709 WriteInt32ToBuffer(BCSize , Buffer, Position); 1710 WriteInt32ToBuffer(CPUType , Buffer, Position); 1711 1712 // If the file is not a multiple of 16 bytes, insert dummy padding. 1713 while (Buffer.size() & 15) 1714 Buffer.push_back(0); 1715} 1716 1717/// WriteBitcodeToFile - Write the specified module to the specified output 1718/// stream. 1719void llvm_2_9_func::WriteBitcodeToFile(const Module *M, raw_ostream &Out) { 1720 SmallVector<char, 1024> Buffer; 1721 Buffer.reserve(256*1024); 1722 1723 // If this is darwin or another generic macho target, reserve space for the 1724 // header. 1725 Triple TT(M->getTargetTriple()); 1726 if (TT.isOSDarwin()) 1727 Buffer.insert(Buffer.begin(), DarwinBCHeaderSize, 0); 1728 1729 // Emit the module into the buffer. 1730 { 1731 BitstreamWriter Stream(Buffer); 1732 1733 // Emit the file header. 1734 Stream.Emit((unsigned)'B', 8); 1735 Stream.Emit((unsigned)'C', 8); 1736 Stream.Emit(0x0, 4); 1737 Stream.Emit(0xC, 4); 1738 Stream.Emit(0xE, 4); 1739 Stream.Emit(0xD, 4); 1740 1741 // Emit the module. 1742 WriteModule(M, Stream); 1743 } 1744 1745 if (TT.isOSDarwin()) 1746 EmitDarwinBCHeaderAndTrailer(Buffer, TT); 1747 1748 // Write the generated bitstream to "Out". 1749 Out.write((char*)&Buffer.front(), Buffer.size()); 1750} 1751