BitcodeWriter.cpp revision 23c4358f12bd9d0ba7166eceebd683db95a41b3f
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.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> 32using namespace llvm; 33 34// Redefine older bitcode opcodes for use here. Note that these come from 35// LLVM 2.7 (which is what HC shipped with). 36#define METADATA_NODE_2_7 2 37#define METADATA_FN_NODE_2_7 3 38#define METADATA_NAMED_NODE_2_7 5 39#define METADATA_ATTACHMENT_2_7 7 40#define FUNC_CODE_INST_CALL_2_7 22 41#define FUNC_CODE_DEBUG_LOC_2_7 32 42 43// Redefine older bitcode opcodes for use here. Note that these come from 44// LLVM 2.7 - 3.0. 45#define TYPE_BLOCK_ID_OLD_3_0 10 46#define TYPE_SYMTAB_BLOCK_ID_OLD_3_0 13 47#define TYPE_CODE_STRUCT_OLD_3_0 10 48 49/// These are manifest constants used by the bitcode writer. They do not need to 50/// be kept in sync with the reader, but need to be consistent within this file. 51enum { 52 CurVersion = 0, 53 54 // VALUE_SYMTAB_BLOCK abbrev id's. 55 VST_ENTRY_8_ABBREV = bitc::FIRST_APPLICATION_ABBREV, 56 VST_ENTRY_7_ABBREV, 57 VST_ENTRY_6_ABBREV, 58 VST_BBENTRY_6_ABBREV, 59 60 // CONSTANTS_BLOCK abbrev id's. 61 CONSTANTS_SETTYPE_ABBREV = bitc::FIRST_APPLICATION_ABBREV, 62 CONSTANTS_INTEGER_ABBREV, 63 CONSTANTS_CE_CAST_Abbrev, 64 CONSTANTS_NULL_Abbrev, 65 66 // FUNCTION_BLOCK abbrev id's. 67 FUNCTION_INST_LOAD_ABBREV = bitc::FIRST_APPLICATION_ABBREV, 68 FUNCTION_INST_BINOP_ABBREV, 69 FUNCTION_INST_BINOP_FLAGS_ABBREV, 70 FUNCTION_INST_CAST_ABBREV, 71 FUNCTION_INST_RET_VOID_ABBREV, 72 FUNCTION_INST_RET_VAL_ABBREV, 73 FUNCTION_INST_UNREACHABLE_ABBREV 74}; 75 76 77static unsigned GetEncodedCastOpcode(unsigned Opcode) { 78 switch (Opcode) { 79 default: llvm_unreachable("Unknown cast instruction!"); 80 case Instruction::Trunc : return bitc::CAST_TRUNC; 81 case Instruction::ZExt : return bitc::CAST_ZEXT; 82 case Instruction::SExt : return bitc::CAST_SEXT; 83 case Instruction::FPToUI : return bitc::CAST_FPTOUI; 84 case Instruction::FPToSI : return bitc::CAST_FPTOSI; 85 case Instruction::UIToFP : return bitc::CAST_UITOFP; 86 case Instruction::SIToFP : return bitc::CAST_SITOFP; 87 case Instruction::FPTrunc : return bitc::CAST_FPTRUNC; 88 case Instruction::FPExt : return bitc::CAST_FPEXT; 89 case Instruction::PtrToInt: return bitc::CAST_PTRTOINT; 90 case Instruction::IntToPtr: return bitc::CAST_INTTOPTR; 91 case Instruction::BitCast : return bitc::CAST_BITCAST; 92 } 93} 94 95static unsigned GetEncodedBinaryOpcode(unsigned Opcode) { 96 switch (Opcode) { 97 default: llvm_unreachable("Unknown binary instruction!"); 98 case Instruction::Add: 99 case Instruction::FAdd: return bitc::BINOP_ADD; 100 case Instruction::Sub: 101 case Instruction::FSub: return bitc::BINOP_SUB; 102 case Instruction::Mul: 103 case Instruction::FMul: return bitc::BINOP_MUL; 104 case Instruction::UDiv: return bitc::BINOP_UDIV; 105 case Instruction::FDiv: 106 case Instruction::SDiv: return bitc::BINOP_SDIV; 107 case Instruction::URem: return bitc::BINOP_UREM; 108 case Instruction::FRem: 109 case Instruction::SRem: return bitc::BINOP_SREM; 110 case Instruction::Shl: return bitc::BINOP_SHL; 111 case Instruction::LShr: return bitc::BINOP_LSHR; 112 case Instruction::AShr: return bitc::BINOP_ASHR; 113 case Instruction::And: return bitc::BINOP_AND; 114 case Instruction::Or: return bitc::BINOP_OR; 115 case Instruction::Xor: return bitc::BINOP_XOR; 116 } 117} 118 119static void WriteStringRecord(unsigned Code, StringRef Str, 120 unsigned AbbrevToUse, BitstreamWriter &Stream) { 121 SmallVector<unsigned, 64> Vals; 122 123 // Code: [strchar x N] 124 for (unsigned i = 0, e = Str.size(); i != e; ++i) { 125 if (AbbrevToUse && !BitCodeAbbrevOp::isChar6(Str[i])) 126 AbbrevToUse = 0; 127 Vals.push_back(Str[i]); 128 } 129 130 // Emit the finished record. 131 Stream.EmitRecord(Code, Vals, AbbrevToUse); 132} 133 134// Emit information about parameter attributes. 135static void WriteAttributeTable(const llvm_2_9::ValueEnumerator &VE, 136 BitstreamWriter &Stream) { 137 const std::vector<AttributeSet> &Attrs = VE.getAttributes(); 138 if (Attrs.empty()) return; 139 140 Stream.EnterSubblock(bitc::PARAMATTR_BLOCK_ID, 3); 141 142 SmallVector<uint64_t, 64> Record; 143 for (unsigned i = 0, e = Attrs.size(); i != e; ++i) { 144 const AttributeSet &A = Attrs[i]; 145 for (unsigned i = 0, e = A.getNumSlots(); i != e; ++i) { 146 const AttributeWithIndex &PAWI = A.getSlot(i); 147 Record.push_back(PAWI.Index); 148 Record.push_back(Attribute::encodeLLVMAttributesForBitcode(PAWI.Attrs)); 149#if 0 150 // FIXME: remove in LLVM 3.0 151 // Store the alignment in the bitcode as a 16-bit raw value instead of a 152 // 5-bit log2 encoded value. Shift the bits above the alignment up by 153 // 11 bits. 154 uint64_t FauxAttr = PAWI.Attrs.Raw() & 0xffff; 155 if (PAWI.Attrs & Attribute::Alignment) 156 FauxAttr |= (1ull<<16)<< 157 (((PAWI.Attrs & Attribute::Alignment).Raw()-1) >> 16); 158 FauxAttr |= (PAWI.Attrs.Raw() & (0x3FFull << 21)) << 11; 159 160 Record.push_back(FauxAttr); 161#endif 162 } 163 164 Stream.EmitRecord(bitc::PARAMATTR_CODE_ENTRY, Record); 165 Record.clear(); 166 } 167 168 Stream.ExitBlock(); 169} 170 171static void WriteTypeSymbolTable(const llvm_2_9::ValueEnumerator &VE, 172 BitstreamWriter &Stream) { 173 const llvm_2_9::ValueEnumerator::TypeList &TypeList = VE.getTypes(); 174 Stream.EnterSubblock(TYPE_SYMTAB_BLOCK_ID_OLD_3_0, 3); 175 176 // 7-bit fixed width VST_CODE_ENTRY strings. 177 BitCodeAbbrev *Abbv = new BitCodeAbbrev(); 178 Abbv->Add(BitCodeAbbrevOp(bitc::VST_CODE_ENTRY)); 179 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 180 Log2_32_Ceil(VE.getTypes().size()+1))); 181 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array)); 182 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 7)); 183 unsigned V7Abbrev = Stream.EmitAbbrev(Abbv); 184 185 SmallVector<unsigned, 64> NameVals; 186 187 for (unsigned i = 0, e = TypeList.size(); i != e; ++i) { 188 Type *T = TypeList[i]; 189 190 switch (T->getTypeID()) { 191 case Type::StructTyID: { 192 StructType *ST = cast<StructType>(T); 193 if (ST->isLiteral()) { 194 // Skip anonymous struct definitions in type symbol table 195 // FIXME(srhines) 196 break; 197 } 198 199 // TST_ENTRY: [typeid, namechar x N] 200 NameVals.push_back(i); 201 202 const std::string &Str = ST->getName(); 203 bool is7Bit = true; 204 for (unsigned i = 0, e = Str.size(); i != e; ++i) { 205 NameVals.push_back((unsigned char)Str[i]); 206 if (Str[i] & 128) 207 is7Bit = false; 208 } 209 210 // Emit the finished record. 211 Stream.EmitRecord(bitc::VST_CODE_ENTRY, NameVals, is7Bit ? V7Abbrev : 0); 212 NameVals.clear(); 213 214 break; 215 } 216 default: break; 217 } 218 } 219 220#if 0 221 for (TypeSymbolTable::const_iterator TI = TST.begin(), TE = TST.end(); 222 TI != TE; ++TI) { 223 // TST_ENTRY: [typeid, namechar x N] 224 NameVals.push_back(VE.getTypeID(TI->second)); 225 226 const std::string &Str = TI->first; 227 bool is7Bit = true; 228 for (unsigned i = 0, e = Str.size(); i != e; ++i) { 229 NameVals.push_back((unsigned char)Str[i]); 230 if (Str[i] & 128) 231 is7Bit = false; 232 } 233 234 // Emit the finished record. 235 Stream.EmitRecord(bitc::VST_CODE_ENTRY, NameVals, is7Bit ? V7Abbrev : 0); 236 NameVals.clear(); 237 } 238#endif 239 240 Stream.ExitBlock(); 241} 242 243/// WriteTypeTable - Write out the type table for a module. 244static void WriteTypeTable(const llvm_2_9::ValueEnumerator &VE, 245 BitstreamWriter &Stream) { 246 const llvm_2_9::ValueEnumerator::TypeList &TypeList = VE.getTypes(); 247 248 Stream.EnterSubblock(TYPE_BLOCK_ID_OLD_3_0, 4 /*count from # abbrevs */); 249 SmallVector<uint64_t, 64> TypeVals; 250 251 // Abbrev for TYPE_CODE_POINTER. 252 BitCodeAbbrev *Abbv = new BitCodeAbbrev(); 253 Abbv->Add(BitCodeAbbrevOp(bitc::TYPE_CODE_POINTER)); 254 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 255 Log2_32_Ceil(VE.getTypes().size()+1))); 256 Abbv->Add(BitCodeAbbrevOp(0)); // Addrspace = 0 257 unsigned PtrAbbrev = Stream.EmitAbbrev(Abbv); 258 259 // Abbrev for TYPE_CODE_FUNCTION. 260 Abbv = new BitCodeAbbrev(); 261 Abbv->Add(BitCodeAbbrevOp(bitc::TYPE_CODE_FUNCTION_OLD)); 262 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // isvararg 263 Abbv->Add(BitCodeAbbrevOp(0)); // FIXME: DEAD value, remove in LLVM 3.0 264 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array)); 265 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 266 Log2_32_Ceil(VE.getTypes().size()+1))); 267 unsigned FunctionAbbrev = Stream.EmitAbbrev(Abbv); 268 269#if 0 270 // Abbrev for TYPE_CODE_STRUCT_ANON. 271 Abbv = new BitCodeAbbrev(); 272 Abbv->Add(BitCodeAbbrevOp(bitc::TYPE_CODE_STRUCT_ANON)); 273 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // ispacked 274 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array)); 275 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 276 Log2_32_Ceil(VE.getTypes().size()+1))); 277 unsigned StructAnonAbbrev = Stream.EmitAbbrev(Abbv); 278 279 // Abbrev for TYPE_CODE_STRUCT_NAME. 280 Abbv = new BitCodeAbbrev(); 281 Abbv->Add(BitCodeAbbrevOp(bitc::TYPE_CODE_STRUCT_NAME)); 282 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array)); 283 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Char6)); 284 unsigned StructNameAbbrev = Stream.EmitAbbrev(Abbv); 285 286 // Abbrev for TYPE_CODE_STRUCT_NAMED. 287 Abbv = new BitCodeAbbrev(); 288 Abbv->Add(BitCodeAbbrevOp(bitc::TYPE_CODE_STRUCT_NAMED)); 289 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // ispacked 290 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array)); 291 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 292 Log2_32_Ceil(VE.getTypes().size()+1))); 293 unsigned StructNamedAbbrev = Stream.EmitAbbrev(Abbv); 294#endif 295 296 // Abbrev for TYPE_CODE_STRUCT. 297 Abbv = new BitCodeAbbrev(); 298 Abbv->Add(BitCodeAbbrevOp(TYPE_CODE_STRUCT_OLD_3_0)); 299 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // ispacked 300 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array)); 301 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 302 Log2_32_Ceil(VE.getTypes().size()+1))); 303 unsigned StructAbbrev = Stream.EmitAbbrev(Abbv); 304 305 // Abbrev for TYPE_CODE_ARRAY. 306 Abbv = new BitCodeAbbrev(); 307 Abbv->Add(BitCodeAbbrevOp(bitc::TYPE_CODE_ARRAY)); 308 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8)); // size 309 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 310 Log2_32_Ceil(VE.getTypes().size()+1))); 311 unsigned ArrayAbbrev = Stream.EmitAbbrev(Abbv); 312 313 // Emit an entry count so the reader can reserve space. 314 TypeVals.push_back(TypeList.size()); 315 Stream.EmitRecord(bitc::TYPE_CODE_NUMENTRY, TypeVals); 316 TypeVals.clear(); 317 318 // Loop over all of the types, emitting each in turn. 319 for (unsigned i = 0, e = TypeList.size(); i != e; ++i) { 320 Type *T = TypeList[i]; 321 int AbbrevToUse = 0; 322 unsigned Code = 0; 323 324 switch (T->getTypeID()) { 325 default: llvm_unreachable("Unknown type!"); 326 case Type::VoidTyID: Code = bitc::TYPE_CODE_VOID; break; 327 case Type::FloatTyID: Code = bitc::TYPE_CODE_FLOAT; break; 328 case Type::DoubleTyID: Code = bitc::TYPE_CODE_DOUBLE; break; 329 case Type::X86_FP80TyID: Code = bitc::TYPE_CODE_X86_FP80; break; 330 case Type::FP128TyID: Code = bitc::TYPE_CODE_FP128; break; 331 case Type::PPC_FP128TyID: Code = bitc::TYPE_CODE_PPC_FP128; break; 332 case Type::LabelTyID: Code = bitc::TYPE_CODE_LABEL; break; 333 case Type::MetadataTyID: Code = bitc::TYPE_CODE_METADATA; break; 334 case Type::X86_MMXTyID: Code = bitc::TYPE_CODE_X86_MMX; break; 335 case Type::IntegerTyID: 336 // INTEGER: [width] 337 Code = bitc::TYPE_CODE_INTEGER; 338 TypeVals.push_back(cast<IntegerType>(T)->getBitWidth()); 339 break; 340 case Type::PointerTyID: { 341 PointerType *PTy = cast<PointerType>(T); 342 // POINTER: [pointee type, address space] 343 Code = bitc::TYPE_CODE_POINTER; 344 TypeVals.push_back(VE.getTypeID(PTy->getElementType())); 345 unsigned AddressSpace = PTy->getAddressSpace(); 346 TypeVals.push_back(AddressSpace); 347 if (AddressSpace == 0) AbbrevToUse = PtrAbbrev; 348 break; 349 } 350 case Type::FunctionTyID: { 351 FunctionType *FT = cast<FunctionType>(T); 352 // FUNCTION: [isvararg, attrid, retty, paramty x N] 353 Code = bitc::TYPE_CODE_FUNCTION_OLD; 354 TypeVals.push_back(FT->isVarArg()); 355 TypeVals.push_back(0); // FIXME: DEAD: remove in llvm 3.0 356 TypeVals.push_back(VE.getTypeID(FT->getReturnType())); 357 for (unsigned i = 0, e = FT->getNumParams(); i != e; ++i) 358 TypeVals.push_back(VE.getTypeID(FT->getParamType(i))); 359 AbbrevToUse = FunctionAbbrev; 360 break; 361 } 362 case Type::StructTyID: { 363 StructType *ST = cast<StructType>(T); 364 // STRUCT: [ispacked, eltty x N] 365 TypeVals.push_back(ST->isPacked()); 366 // Output all of the element types. 367 for (StructType::element_iterator I = ST->element_begin(), 368 E = ST->element_end(); I != E; ++I) 369 TypeVals.push_back(VE.getTypeID(*I)); 370 AbbrevToUse = StructAbbrev; 371 break; 372 } 373 case Type::ArrayTyID: { 374 ArrayType *AT = cast<ArrayType>(T); 375 // ARRAY: [numelts, eltty] 376 Code = bitc::TYPE_CODE_ARRAY; 377 TypeVals.push_back(AT->getNumElements()); 378 TypeVals.push_back(VE.getTypeID(AT->getElementType())); 379 AbbrevToUse = ArrayAbbrev; 380 break; 381 } 382 case Type::VectorTyID: { 383 VectorType *VT = cast<VectorType>(T); 384 // VECTOR [numelts, eltty] 385 Code = bitc::TYPE_CODE_VECTOR; 386 TypeVals.push_back(VT->getNumElements()); 387 TypeVals.push_back(VE.getTypeID(VT->getElementType())); 388 break; 389 } 390 } 391 392 // Emit the finished record. 393 Stream.EmitRecord(Code, TypeVals, AbbrevToUse); 394 TypeVals.clear(); 395 } 396 397 Stream.ExitBlock(); 398 399 WriteTypeSymbolTable(VE, Stream); 400} 401 402static unsigned getEncodedLinkage(const GlobalValue *GV) { 403 switch (GV->getLinkage()) { 404 case GlobalValue::ExternalLinkage: return 0; 405 case GlobalValue::WeakAnyLinkage: return 1; 406 case GlobalValue::AppendingLinkage: return 2; 407 case GlobalValue::InternalLinkage: return 3; 408 case GlobalValue::LinkOnceAnyLinkage: return 4; 409 case GlobalValue::DLLImportLinkage: return 5; 410 case GlobalValue::DLLExportLinkage: return 6; 411 case GlobalValue::ExternalWeakLinkage: return 7; 412 case GlobalValue::CommonLinkage: return 8; 413 case GlobalValue::PrivateLinkage: return 9; 414 case GlobalValue::WeakODRLinkage: return 10; 415 case GlobalValue::LinkOnceODRLinkage: return 11; 416 case GlobalValue::AvailableExternallyLinkage: return 12; 417 case GlobalValue::LinkerPrivateLinkage: return 13; 418 case GlobalValue::LinkerPrivateWeakLinkage: return 14; 419 case GlobalValue::LinkOnceODRAutoHideLinkage: return 15; 420 } 421 llvm_unreachable("Invalid linkage"); 422} 423 424static unsigned getEncodedVisibility(const GlobalValue *GV) { 425 switch (GV->getVisibility()) { 426 default: llvm_unreachable("Invalid visibility!"); 427 case GlobalValue::DefaultVisibility: return 0; 428 case GlobalValue::HiddenVisibility: return 1; 429 case GlobalValue::ProtectedVisibility: return 2; 430 } 431} 432 433// Emit top-level description of module, including target triple, inline asm, 434// descriptors for global variables, and function prototype info. 435static void WriteModuleInfo(const Module *M, 436 const llvm_2_9::ValueEnumerator &VE, 437 BitstreamWriter &Stream) { 438 // Emit various pieces of data attached to a module. 439 if (!M->getTargetTriple().empty()) 440 WriteStringRecord(bitc::MODULE_CODE_TRIPLE, M->getTargetTriple(), 441 0/*TODO*/, Stream); 442 if (!M->getDataLayout().empty()) 443 WriteStringRecord(bitc::MODULE_CODE_DATALAYOUT, M->getDataLayout(), 444 0/*TODO*/, Stream); 445 if (!M->getModuleInlineAsm().empty()) 446 WriteStringRecord(bitc::MODULE_CODE_ASM, M->getModuleInlineAsm(), 447 0/*TODO*/, Stream); 448 449 // Emit information about sections and GC, computing how many there are. Also 450 // compute the maximum alignment value. 451 std::map<std::string, unsigned> SectionMap; 452 std::map<std::string, unsigned> GCMap; 453 unsigned MaxAlignment = 0; 454 unsigned MaxGlobalType = 0; 455 for (Module::const_global_iterator GV = M->global_begin(),E = M->global_end(); 456 GV != E; ++GV) { 457 MaxAlignment = std::max(MaxAlignment, GV->getAlignment()); 458 MaxGlobalType = std::max(MaxGlobalType, VE.getTypeID(GV->getType())); 459 460 if (!GV->hasSection()) continue; 461 // Give section names unique ID's. 462 unsigned &Entry = SectionMap[GV->getSection()]; 463 if (Entry != 0) continue; 464 WriteStringRecord(bitc::MODULE_CODE_SECTIONNAME, GV->getSection(), 465 0/*TODO*/, Stream); 466 Entry = SectionMap.size(); 467 } 468 for (Module::const_iterator F = M->begin(), E = M->end(); F != E; ++F) { 469 MaxAlignment = std::max(MaxAlignment, F->getAlignment()); 470 if (F->hasSection()) { 471 // Give section names unique ID's. 472 unsigned &Entry = SectionMap[F->getSection()]; 473 if (!Entry) { 474 WriteStringRecord(bitc::MODULE_CODE_SECTIONNAME, F->getSection(), 475 0/*TODO*/, Stream); 476 Entry = SectionMap.size(); 477 } 478 } 479 if (F->hasGC()) { 480 // Same for GC names. 481 unsigned &Entry = GCMap[F->getGC()]; 482 if (!Entry) { 483 WriteStringRecord(bitc::MODULE_CODE_GCNAME, F->getGC(), 484 0/*TODO*/, Stream); 485 Entry = GCMap.size(); 486 } 487 } 488 } 489 490 // Emit abbrev for globals, now that we know # sections and max alignment. 491 unsigned SimpleGVarAbbrev = 0; 492 if (!M->global_empty()) { 493 // Add an abbrev for common globals with no visibility or thread localness. 494 BitCodeAbbrev *Abbv = new BitCodeAbbrev(); 495 Abbv->Add(BitCodeAbbrevOp(bitc::MODULE_CODE_GLOBALVAR)); 496 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 497 Log2_32_Ceil(MaxGlobalType+1))); 498 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // Constant. 499 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Initializer. 500 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 4)); // Linkage. 501 if (MaxAlignment == 0) // Alignment. 502 Abbv->Add(BitCodeAbbrevOp(0)); 503 else { 504 unsigned MaxEncAlignment = Log2_32(MaxAlignment)+1; 505 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 506 Log2_32_Ceil(MaxEncAlignment+1))); 507 } 508 if (SectionMap.empty()) // Section. 509 Abbv->Add(BitCodeAbbrevOp(0)); 510 else 511 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 512 Log2_32_Ceil(SectionMap.size()+1))); 513 // Don't bother emitting vis + thread local. 514 SimpleGVarAbbrev = Stream.EmitAbbrev(Abbv); 515 } 516 517 // Emit the global variable information. 518 SmallVector<unsigned, 64> Vals; 519 for (Module::const_global_iterator GV = M->global_begin(),E = M->global_end(); 520 GV != E; ++GV) { 521 unsigned AbbrevToUse = 0; 522 523 // GLOBALVAR: [type, isconst, initid, 524 // linkage, alignment, section, visibility, threadlocal, 525 // unnamed_addr] 526 Vals.push_back(VE.getTypeID(GV->getType())); 527 Vals.push_back(GV->isConstant()); 528 Vals.push_back(GV->isDeclaration() ? 0 : 529 (VE.getValueID(GV->getInitializer()) + 1)); 530 Vals.push_back(getEncodedLinkage(GV)); 531 Vals.push_back(Log2_32(GV->getAlignment())+1); 532 Vals.push_back(GV->hasSection() ? SectionMap[GV->getSection()] : 0); 533 if (GV->isThreadLocal() || 534 GV->getVisibility() != GlobalValue::DefaultVisibility || 535 GV->hasUnnamedAddr()) { 536 Vals.push_back(getEncodedVisibility(GV)); 537 Vals.push_back(GV->isThreadLocal()); 538 Vals.push_back(GV->hasUnnamedAddr()); 539 } else { 540 AbbrevToUse = SimpleGVarAbbrev; 541 } 542 543 Stream.EmitRecord(bitc::MODULE_CODE_GLOBALVAR, Vals, AbbrevToUse); 544 Vals.clear(); 545 } 546 547 // Emit the function proto information. 548 for (Module::const_iterator F = M->begin(), E = M->end(); F != E; ++F) { 549 // FUNCTION: [type, callingconv, isproto, paramattr, 550 // linkage, alignment, section, visibility, gc, unnamed_addr] 551 Vals.push_back(VE.getTypeID(F->getType())); 552 Vals.push_back(F->getCallingConv()); 553 Vals.push_back(F->isDeclaration()); 554 Vals.push_back(getEncodedLinkage(F)); 555 Vals.push_back(VE.getAttributeID(F->getAttributes())); 556 Vals.push_back(Log2_32(F->getAlignment())+1); 557 Vals.push_back(F->hasSection() ? SectionMap[F->getSection()] : 0); 558 Vals.push_back(getEncodedVisibility(F)); 559 Vals.push_back(F->hasGC() ? GCMap[F->getGC()] : 0); 560 Vals.push_back(F->hasUnnamedAddr()); 561 562 unsigned AbbrevToUse = 0; 563 Stream.EmitRecord(bitc::MODULE_CODE_FUNCTION, Vals, AbbrevToUse); 564 Vals.clear(); 565 } 566 567 // Emit the alias information. 568 for (Module::const_alias_iterator AI = M->alias_begin(), E = M->alias_end(); 569 AI != E; ++AI) { 570 Vals.push_back(VE.getTypeID(AI->getType())); 571 Vals.push_back(VE.getValueID(AI->getAliasee())); 572 Vals.push_back(getEncodedLinkage(AI)); 573 Vals.push_back(getEncodedVisibility(AI)); 574 unsigned AbbrevToUse = 0; 575 Stream.EmitRecord(bitc::MODULE_CODE_ALIAS, Vals, AbbrevToUse); 576 Vals.clear(); 577 } 578} 579 580static uint64_t GetOptimizationFlags(const Value *V) { 581 uint64_t Flags = 0; 582 583 if (const OverflowingBinaryOperator *OBO = 584 dyn_cast<OverflowingBinaryOperator>(V)) { 585 if (OBO->hasNoSignedWrap()) 586 Flags |= 1 << bitc::OBO_NO_SIGNED_WRAP; 587 if (OBO->hasNoUnsignedWrap()) 588 Flags |= 1 << bitc::OBO_NO_UNSIGNED_WRAP; 589 } else if (const PossiblyExactOperator *PEO = 590 dyn_cast<PossiblyExactOperator>(V)) { 591 if (PEO->isExact()) 592 Flags |= 1 << bitc::PEO_EXACT; 593 } 594 595 return Flags; 596} 597 598static void WriteMDNode(const MDNode *N, 599 const llvm_2_9::ValueEnumerator &VE, 600 BitstreamWriter &Stream, 601 SmallVector<uint64_t, 64> &Record) { 602 for (unsigned i = 0, e = N->getNumOperands(); i != e; ++i) { 603 if (N->getOperand(i)) { 604 Record.push_back(VE.getTypeID(N->getOperand(i)->getType())); 605 Record.push_back(VE.getValueID(N->getOperand(i))); 606 } else { 607 Record.push_back(VE.getTypeID(Type::getVoidTy(N->getContext()))); 608 Record.push_back(0); 609 } 610 } 611 unsigned MDCode = N->isFunctionLocal() ? METADATA_FN_NODE_2_7 : 612 METADATA_NODE_2_7; 613 Stream.EmitRecord(MDCode, Record, 0); 614 Record.clear(); 615} 616 617static void WriteModuleMetadata(const Module *M, 618 const llvm_2_9::ValueEnumerator &VE, 619 BitstreamWriter &Stream) { 620 const llvm_2_9::ValueEnumerator::ValueList &Vals = VE.getMDValues(); 621 bool StartedMetadataBlock = false; 622 unsigned MDSAbbrev = 0; 623 SmallVector<uint64_t, 64> Record; 624 for (unsigned i = 0, e = Vals.size(); i != e; ++i) { 625 626 if (const MDNode *N = dyn_cast<MDNode>(Vals[i].first)) { 627 if (!N->isFunctionLocal() || !N->getFunction()) { 628 if (!StartedMetadataBlock) { 629 Stream.EnterSubblock(bitc::METADATA_BLOCK_ID, 3); 630 StartedMetadataBlock = true; 631 } 632 WriteMDNode(N, VE, Stream, Record); 633 } 634 } else if (const MDString *MDS = dyn_cast<MDString>(Vals[i].first)) { 635 if (!StartedMetadataBlock) { 636 Stream.EnterSubblock(bitc::METADATA_BLOCK_ID, 3); 637 638 // Abbrev for METADATA_STRING. 639 BitCodeAbbrev *Abbv = new BitCodeAbbrev(); 640 Abbv->Add(BitCodeAbbrevOp(bitc::METADATA_STRING)); 641 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array)); 642 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 8)); 643 MDSAbbrev = Stream.EmitAbbrev(Abbv); 644 StartedMetadataBlock = true; 645 } 646 647 // Code: [strchar x N] 648 Record.append(MDS->begin(), MDS->end()); 649 650 // Emit the finished record. 651 Stream.EmitRecord(bitc::METADATA_STRING, Record, MDSAbbrev); 652 Record.clear(); 653 } 654 } 655 656 // Write named metadata. 657 for (Module::const_named_metadata_iterator I = M->named_metadata_begin(), 658 E = M->named_metadata_end(); I != E; ++I) { 659 const NamedMDNode *NMD = I; 660 if (!StartedMetadataBlock) { 661 Stream.EnterSubblock(bitc::METADATA_BLOCK_ID, 3); 662 StartedMetadataBlock = true; 663 } 664 665 // Write name. 666 StringRef Str = NMD->getName(); 667 for (unsigned i = 0, e = Str.size(); i != e; ++i) 668 Record.push_back(Str[i]); 669 Stream.EmitRecord(bitc::METADATA_NAME, Record, 0/*TODO*/); 670 Record.clear(); 671 672 // Write named metadata operands. 673 for (unsigned i = 0, e = NMD->getNumOperands(); i != e; ++i) 674 Record.push_back(VE.getValueID(NMD->getOperand(i))); 675 Stream.EmitRecord(METADATA_NAMED_NODE_2_7, Record, 0); 676 Record.clear(); 677 } 678 679 if (StartedMetadataBlock) 680 Stream.ExitBlock(); 681} 682 683static void WriteFunctionLocalMetadata(const Function &F, 684 const llvm_2_9::ValueEnumerator &VE, 685 BitstreamWriter &Stream) { 686 bool StartedMetadataBlock = false; 687 SmallVector<uint64_t, 64> Record; 688 const SmallVector<const MDNode *, 8> &Vals = VE.getFunctionLocalMDValues(); 689 for (unsigned i = 0, e = Vals.size(); i != e; ++i) 690 if (const MDNode *N = Vals[i]) 691 if (N->isFunctionLocal() && N->getFunction() == &F) { 692 if (!StartedMetadataBlock) { 693 Stream.EnterSubblock(bitc::METADATA_BLOCK_ID, 3); 694 StartedMetadataBlock = true; 695 } 696 WriteMDNode(N, VE, Stream, Record); 697 } 698 699 if (StartedMetadataBlock) 700 Stream.ExitBlock(); 701} 702 703static void WriteMetadataAttachment(const Function &F, 704 const llvm_2_9::ValueEnumerator &VE, 705 BitstreamWriter &Stream) { 706 Stream.EnterSubblock(bitc::METADATA_ATTACHMENT_ID, 3); 707 708 SmallVector<uint64_t, 64> Record; 709 710 // Write metadata attachments 711 // METADATA_ATTACHMENT - [m x [value, [n x [id, mdnode]]] 712 SmallVector<std::pair<unsigned, MDNode*>, 4> MDs; 713 714 for (Function::const_iterator BB = F.begin(), E = F.end(); BB != E; ++BB) 715 for (BasicBlock::const_iterator I = BB->begin(), E = BB->end(); 716 I != E; ++I) { 717 MDs.clear(); 718 I->getAllMetadataOtherThanDebugLoc(MDs); 719 720 // If no metadata, ignore instruction. 721 if (MDs.empty()) continue; 722 723 Record.push_back(VE.getInstructionID(I)); 724 725 for (unsigned i = 0, e = MDs.size(); i != e; ++i) { 726 Record.push_back(MDs[i].first); 727 Record.push_back(VE.getValueID(MDs[i].second)); 728 } 729 Stream.EmitRecord(METADATA_ATTACHMENT_2_7, Record, 0); 730 Record.clear(); 731 } 732 733 Stream.ExitBlock(); 734} 735 736static void WriteModuleMetadataStore(const Module *M, BitstreamWriter &Stream) { 737 SmallVector<uint64_t, 64> Record; 738 739 // Write metadata kinds 740 // METADATA_KIND - [n x [id, name]] 741 SmallVector<StringRef, 4> Names; 742 M->getMDKindNames(Names); 743 744 if (Names.empty()) return; 745 746 Stream.EnterSubblock(bitc::METADATA_BLOCK_ID, 3); 747 748 for (unsigned MDKindID = 0, e = Names.size(); MDKindID != e; ++MDKindID) { 749 Record.push_back(MDKindID); 750 StringRef KName = Names[MDKindID]; 751 Record.append(KName.begin(), KName.end()); 752 753 Stream.EmitRecord(bitc::METADATA_KIND, Record, 0); 754 Record.clear(); 755 } 756 757 Stream.ExitBlock(); 758} 759 760static void WriteConstants(unsigned FirstVal, unsigned LastVal, 761 const llvm_2_9::ValueEnumerator &VE, 762 BitstreamWriter &Stream, bool isGlobal) { 763 if (FirstVal == LastVal) return; 764 765 Stream.EnterSubblock(bitc::CONSTANTS_BLOCK_ID, 4); 766 767 unsigned AggregateAbbrev = 0; 768 unsigned String8Abbrev = 0; 769 unsigned CString7Abbrev = 0; 770 unsigned CString6Abbrev = 0; 771 // If this is a constant pool for the module, emit module-specific abbrevs. 772 if (isGlobal) { 773 // Abbrev for CST_CODE_AGGREGATE. 774 BitCodeAbbrev *Abbv = new BitCodeAbbrev(); 775 Abbv->Add(BitCodeAbbrevOp(bitc::CST_CODE_AGGREGATE)); 776 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array)); 777 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, Log2_32_Ceil(LastVal+1))); 778 AggregateAbbrev = Stream.EmitAbbrev(Abbv); 779 780 // Abbrev for CST_CODE_STRING. 781 Abbv = new BitCodeAbbrev(); 782 Abbv->Add(BitCodeAbbrevOp(bitc::CST_CODE_STRING)); 783 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array)); 784 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 8)); 785 String8Abbrev = Stream.EmitAbbrev(Abbv); 786 // Abbrev for CST_CODE_CSTRING. 787 Abbv = new BitCodeAbbrev(); 788 Abbv->Add(BitCodeAbbrevOp(bitc::CST_CODE_CSTRING)); 789 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array)); 790 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 7)); 791 CString7Abbrev = Stream.EmitAbbrev(Abbv); 792 // Abbrev for CST_CODE_CSTRING. 793 Abbv = new BitCodeAbbrev(); 794 Abbv->Add(BitCodeAbbrevOp(bitc::CST_CODE_CSTRING)); 795 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array)); 796 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Char6)); 797 CString6Abbrev = Stream.EmitAbbrev(Abbv); 798 } 799 800 SmallVector<uint64_t, 64> Record; 801 802 const llvm_2_9::ValueEnumerator::ValueList &Vals = VE.getValues(); 803 Type *LastTy = 0; 804 for (unsigned i = FirstVal; i != LastVal; ++i) { 805 const Value *V = Vals[i].first; 806 // If we need to switch types, do so now. 807 if (V->getType() != LastTy) { 808 LastTy = V->getType(); 809 Record.push_back(VE.getTypeID(LastTy)); 810 Stream.EmitRecord(bitc::CST_CODE_SETTYPE, Record, 811 CONSTANTS_SETTYPE_ABBREV); 812 Record.clear(); 813 } 814 815 if (const InlineAsm *IA = dyn_cast<InlineAsm>(V)) { 816 Record.push_back(unsigned(IA->hasSideEffects()) | 817 unsigned(IA->isAlignStack()) << 1); 818 819 // Add the asm string. 820 const std::string &AsmStr = IA->getAsmString(); 821 Record.push_back(AsmStr.size()); 822 for (unsigned i = 0, e = AsmStr.size(); i != e; ++i) 823 Record.push_back(AsmStr[i]); 824 825 // Add the constraint string. 826 const std::string &ConstraintStr = IA->getConstraintString(); 827 Record.push_back(ConstraintStr.size()); 828 for (unsigned i = 0, e = ConstraintStr.size(); i != e; ++i) 829 Record.push_back(ConstraintStr[i]); 830 Stream.EmitRecord(bitc::CST_CODE_INLINEASM, Record); 831 Record.clear(); 832 continue; 833 } 834 const Constant *C = cast<Constant>(V); 835 unsigned Code = -1U; 836 unsigned AbbrevToUse = 0; 837 if (C->isNullValue()) { 838 Code = bitc::CST_CODE_NULL; 839 } else if (isa<UndefValue>(C)) { 840 Code = bitc::CST_CODE_UNDEF; 841 } else if (const ConstantInt *IV = dyn_cast<ConstantInt>(C)) { 842 if (IV->getBitWidth() <= 64) { 843 uint64_t V = IV->getSExtValue(); 844 if ((int64_t)V >= 0) 845 Record.push_back(V << 1); 846 else 847 Record.push_back((-V << 1) | 1); 848 Code = bitc::CST_CODE_INTEGER; 849 AbbrevToUse = CONSTANTS_INTEGER_ABBREV; 850 } else { // Wide integers, > 64 bits in size. 851 // We have an arbitrary precision integer value to write whose 852 // bit width is > 64. However, in canonical unsigned integer 853 // format it is likely that the high bits are going to be zero. 854 // So, we only write the number of active words. 855 unsigned NWords = IV->getValue().getActiveWords(); 856 const uint64_t *RawWords = IV->getValue().getRawData(); 857 for (unsigned i = 0; i != NWords; ++i) { 858 int64_t V = RawWords[i]; 859 if (V >= 0) 860 Record.push_back(V << 1); 861 else 862 Record.push_back((-V << 1) | 1); 863 } 864 Code = bitc::CST_CODE_WIDE_INTEGER; 865 } 866 } else if (const ConstantFP *CFP = dyn_cast<ConstantFP>(C)) { 867 Code = bitc::CST_CODE_FLOAT; 868 Type *Ty = CFP->getType(); 869 if (Ty->isFloatTy() || Ty->isDoubleTy()) { 870 Record.push_back(CFP->getValueAPF().bitcastToAPInt().getZExtValue()); 871 } else if (Ty->isX86_FP80Ty()) { 872 // api needed to prevent premature destruction 873 // bits are not in the same order as a normal i80 APInt, compensate. 874 APInt api = CFP->getValueAPF().bitcastToAPInt(); 875 const uint64_t *p = api.getRawData(); 876 Record.push_back((p[1] << 48) | (p[0] >> 16)); 877 Record.push_back(p[0] & 0xffffLL); 878 } else if (Ty->isFP128Ty() || Ty->isPPC_FP128Ty()) { 879 APInt api = CFP->getValueAPF().bitcastToAPInt(); 880 const uint64_t *p = api.getRawData(); 881 Record.push_back(p[0]); 882 Record.push_back(p[1]); 883 } else { 884 assert (0 && "Unknown FP type!"); 885 } 886 } else if (isa<ConstantDataSequential>(C) && 887 cast<ConstantDataSequential>(C)->isString()) { 888 const ConstantDataSequential *Str = cast<ConstantDataSequential>(C); 889 // Emit constant strings specially. 890 unsigned NumElts = Str->getNumElements(); 891 // If this is a null-terminated string, use the denser CSTRING encoding. 892 if (Str->isCString()) { 893 Code = bitc::CST_CODE_CSTRING; 894 --NumElts; // Don't encode the null, which isn't allowed by char6. 895 } else { 896 Code = bitc::CST_CODE_STRING; 897 AbbrevToUse = String8Abbrev; 898 } 899 bool isCStr7 = Code == bitc::CST_CODE_CSTRING; 900 bool isCStrChar6 = Code == bitc::CST_CODE_CSTRING; 901 for (unsigned i = 0; i != NumElts; ++i) { 902 unsigned char V = Str->getElementAsInteger(i); 903 Record.push_back(V); 904 isCStr7 &= (V & 128) == 0; 905 if (isCStrChar6) 906 isCStrChar6 = BitCodeAbbrevOp::isChar6(V); 907 } 908 909 if (isCStrChar6) 910 AbbrevToUse = CString6Abbrev; 911 else if (isCStr7) 912 AbbrevToUse = CString7Abbrev; 913 } else if (const ConstantDataSequential *CDS = 914 dyn_cast<ConstantDataSequential>(C)) { 915 // We must replace ConstantDataSequential's representation with the 916 // legacy ConstantArray/ConstantVector/ConstantStruct version. 917 // ValueEnumerator is similarly modified to mark the appropriate 918 // Constants as used (so they are emitted). 919 Code = bitc::CST_CODE_AGGREGATE; 920 for (unsigned i = 0, e = CDS->getNumElements(); i != e; ++i) 921 Record.push_back(VE.getValueID(CDS->getElementAsConstant(i))); 922 AbbrevToUse = AggregateAbbrev; 923 } else if (isa<ConstantArray>(C) || isa<ConstantStruct>(C) || 924 isa<ConstantVector>(C)) { 925 Code = bitc::CST_CODE_AGGREGATE; 926 for (unsigned i = 0, e = C->getNumOperands(); i != e; ++i) 927 Record.push_back(VE.getValueID(C->getOperand(i))); 928 AbbrevToUse = AggregateAbbrev; 929 } else if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(C)) { 930 switch (CE->getOpcode()) { 931 default: 932 if (Instruction::isCast(CE->getOpcode())) { 933 Code = bitc::CST_CODE_CE_CAST; 934 Record.push_back(GetEncodedCastOpcode(CE->getOpcode())); 935 Record.push_back(VE.getTypeID(C->getOperand(0)->getType())); 936 Record.push_back(VE.getValueID(C->getOperand(0))); 937 AbbrevToUse = CONSTANTS_CE_CAST_Abbrev; 938 } else { 939 assert(CE->getNumOperands() == 2 && "Unknown constant expr!"); 940 Code = bitc::CST_CODE_CE_BINOP; 941 Record.push_back(GetEncodedBinaryOpcode(CE->getOpcode())); 942 Record.push_back(VE.getValueID(C->getOperand(0))); 943 Record.push_back(VE.getValueID(C->getOperand(1))); 944 uint64_t Flags = GetOptimizationFlags(CE); 945 if (Flags != 0) 946 Record.push_back(Flags); 947 } 948 break; 949 case Instruction::GetElementPtr: 950 Code = bitc::CST_CODE_CE_GEP; 951 if (cast<GEPOperator>(C)->isInBounds()) 952 Code = bitc::CST_CODE_CE_INBOUNDS_GEP; 953 for (unsigned i = 0, e = CE->getNumOperands(); i != e; ++i) { 954 Record.push_back(VE.getTypeID(C->getOperand(i)->getType())); 955 Record.push_back(VE.getValueID(C->getOperand(i))); 956 } 957 break; 958 case Instruction::Select: 959 Code = bitc::CST_CODE_CE_SELECT; 960 Record.push_back(VE.getValueID(C->getOperand(0))); 961 Record.push_back(VE.getValueID(C->getOperand(1))); 962 Record.push_back(VE.getValueID(C->getOperand(2))); 963 break; 964 case Instruction::ExtractElement: 965 Code = bitc::CST_CODE_CE_EXTRACTELT; 966 Record.push_back(VE.getTypeID(C->getOperand(0)->getType())); 967 Record.push_back(VE.getValueID(C->getOperand(0))); 968 Record.push_back(VE.getValueID(C->getOperand(1))); 969 break; 970 case Instruction::InsertElement: 971 Code = bitc::CST_CODE_CE_INSERTELT; 972 Record.push_back(VE.getValueID(C->getOperand(0))); 973 Record.push_back(VE.getValueID(C->getOperand(1))); 974 Record.push_back(VE.getValueID(C->getOperand(2))); 975 break; 976 case Instruction::ShuffleVector: 977 // If the return type and argument types are the same, this is a 978 // standard shufflevector instruction. If the types are different, 979 // then the shuffle is widening or truncating the input vectors, and 980 // the argument type must also be encoded. 981 if (C->getType() == C->getOperand(0)->getType()) { 982 Code = bitc::CST_CODE_CE_SHUFFLEVEC; 983 } else { 984 Code = bitc::CST_CODE_CE_SHUFVEC_EX; 985 Record.push_back(VE.getTypeID(C->getOperand(0)->getType())); 986 } 987 Record.push_back(VE.getValueID(C->getOperand(0))); 988 Record.push_back(VE.getValueID(C->getOperand(1))); 989 Record.push_back(VE.getValueID(C->getOperand(2))); 990 break; 991 case Instruction::ICmp: 992 case Instruction::FCmp: 993 Code = bitc::CST_CODE_CE_CMP; 994 Record.push_back(VE.getTypeID(C->getOperand(0)->getType())); 995 Record.push_back(VE.getValueID(C->getOperand(0))); 996 Record.push_back(VE.getValueID(C->getOperand(1))); 997 Record.push_back(CE->getPredicate()); 998 break; 999 } 1000 } else if (const BlockAddress *BA = dyn_cast<BlockAddress>(C)) { 1001 Code = bitc::CST_CODE_BLOCKADDRESS; 1002 Record.push_back(VE.getTypeID(BA->getFunction()->getType())); 1003 Record.push_back(VE.getValueID(BA->getFunction())); 1004 Record.push_back(VE.getGlobalBasicBlockID(BA->getBasicBlock())); 1005 } else { 1006#ifndef NDEBUG 1007 C->dump(); 1008#endif 1009 llvm_unreachable("Unknown constant!"); 1010 } 1011 Stream.EmitRecord(Code, Record, AbbrevToUse); 1012 Record.clear(); 1013 } 1014 1015 Stream.ExitBlock(); 1016} 1017 1018static void WriteModuleConstants(const llvm_2_9::ValueEnumerator &VE, 1019 BitstreamWriter &Stream) { 1020 const llvm_2_9::ValueEnumerator::ValueList &Vals = VE.getValues(); 1021 1022 // Find the first constant to emit, which is the first non-globalvalue value. 1023 // We know globalvalues have been emitted by WriteModuleInfo. 1024 for (unsigned i = 0, e = Vals.size(); i != e; ++i) { 1025 if (!isa<GlobalValue>(Vals[i].first)) { 1026 WriteConstants(i, Vals.size(), VE, Stream, true); 1027 return; 1028 } 1029 } 1030} 1031 1032/// PushValueAndType - The file has to encode both the value and type id for 1033/// many values, because we need to know what type to create for forward 1034/// references. However, most operands are not forward references, so this type 1035/// field is not needed. 1036/// 1037/// This function adds V's value ID to Vals. If the value ID is higher than the 1038/// instruction ID, then it is a forward reference, and it also includes the 1039/// type ID. 1040static bool PushValueAndType(const Value *V, unsigned InstID, 1041 SmallVector<unsigned, 64> &Vals, 1042 llvm_2_9::ValueEnumerator &VE) { 1043 unsigned ValID = VE.getValueID(V); 1044 Vals.push_back(ValID); 1045 if (ValID >= InstID) { 1046 Vals.push_back(VE.getTypeID(V->getType())); 1047 return true; 1048 } 1049 return false; 1050} 1051 1052/// WriteInstruction - Emit an instruction to the specified stream. 1053static void WriteInstruction(const Instruction &I, unsigned InstID, 1054 llvm_2_9::ValueEnumerator &VE, 1055 BitstreamWriter &Stream, 1056 SmallVector<unsigned, 64> &Vals) { 1057 unsigned Code = 0; 1058 unsigned AbbrevToUse = 0; 1059 VE.setInstructionID(&I); 1060 switch (I.getOpcode()) { 1061 default: 1062 if (Instruction::isCast(I.getOpcode())) { 1063 Code = bitc::FUNC_CODE_INST_CAST; 1064 if (!PushValueAndType(I.getOperand(0), InstID, Vals, VE)) 1065 AbbrevToUse = FUNCTION_INST_CAST_ABBREV; 1066 Vals.push_back(VE.getTypeID(I.getType())); 1067 Vals.push_back(GetEncodedCastOpcode(I.getOpcode())); 1068 } else { 1069 assert(isa<BinaryOperator>(I) && "Unknown instruction!"); 1070 Code = bitc::FUNC_CODE_INST_BINOP; 1071 if (!PushValueAndType(I.getOperand(0), InstID, Vals, VE)) 1072 AbbrevToUse = FUNCTION_INST_BINOP_ABBREV; 1073 Vals.push_back(VE.getValueID(I.getOperand(1))); 1074 Vals.push_back(GetEncodedBinaryOpcode(I.getOpcode())); 1075 uint64_t Flags = GetOptimizationFlags(&I); 1076 if (Flags != 0) { 1077 if (AbbrevToUse == FUNCTION_INST_BINOP_ABBREV) 1078 AbbrevToUse = FUNCTION_INST_BINOP_FLAGS_ABBREV; 1079 Vals.push_back(Flags); 1080 } 1081 } 1082 break; 1083 1084 case Instruction::GetElementPtr: 1085 Code = bitc::FUNC_CODE_INST_GEP; 1086 if (cast<GEPOperator>(&I)->isInBounds()) 1087 Code = bitc::FUNC_CODE_INST_INBOUNDS_GEP; 1088 for (unsigned i = 0, e = I.getNumOperands(); i != e; ++i) 1089 PushValueAndType(I.getOperand(i), InstID, Vals, VE); 1090 break; 1091 case Instruction::ExtractValue: { 1092 Code = bitc::FUNC_CODE_INST_EXTRACTVAL; 1093 PushValueAndType(I.getOperand(0), InstID, Vals, VE); 1094 const ExtractValueInst *EVI = cast<ExtractValueInst>(&I); 1095 for (const unsigned *i = EVI->idx_begin(), *e = EVI->idx_end(); i != e; ++i) 1096 Vals.push_back(*i); 1097 break; 1098 } 1099 case Instruction::InsertValue: { 1100 Code = bitc::FUNC_CODE_INST_INSERTVAL; 1101 PushValueAndType(I.getOperand(0), InstID, Vals, VE); 1102 PushValueAndType(I.getOperand(1), InstID, Vals, VE); 1103 const InsertValueInst *IVI = cast<InsertValueInst>(&I); 1104 for (const unsigned *i = IVI->idx_begin(), *e = IVI->idx_end(); i != e; ++i) 1105 Vals.push_back(*i); 1106 break; 1107 } 1108 case Instruction::Select: 1109 Code = bitc::FUNC_CODE_INST_VSELECT; 1110 PushValueAndType(I.getOperand(1), InstID, Vals, VE); 1111 Vals.push_back(VE.getValueID(I.getOperand(2))); 1112 PushValueAndType(I.getOperand(0), InstID, Vals, VE); 1113 break; 1114 case Instruction::ExtractElement: 1115 Code = bitc::FUNC_CODE_INST_EXTRACTELT; 1116 PushValueAndType(I.getOperand(0), InstID, Vals, VE); 1117 Vals.push_back(VE.getValueID(I.getOperand(1))); 1118 break; 1119 case Instruction::InsertElement: 1120 Code = bitc::FUNC_CODE_INST_INSERTELT; 1121 PushValueAndType(I.getOperand(0), InstID, Vals, VE); 1122 Vals.push_back(VE.getValueID(I.getOperand(1))); 1123 Vals.push_back(VE.getValueID(I.getOperand(2))); 1124 break; 1125 case Instruction::ShuffleVector: 1126 Code = bitc::FUNC_CODE_INST_SHUFFLEVEC; 1127 PushValueAndType(I.getOperand(0), InstID, Vals, VE); 1128 Vals.push_back(VE.getValueID(I.getOperand(1))); 1129 Vals.push_back(VE.getValueID(I.getOperand(2))); 1130 break; 1131 case Instruction::ICmp: 1132 case Instruction::FCmp: 1133 // compare returning Int1Ty or vector of Int1Ty 1134 Code = bitc::FUNC_CODE_INST_CMP2; 1135 PushValueAndType(I.getOperand(0), InstID, Vals, VE); 1136 Vals.push_back(VE.getValueID(I.getOperand(1))); 1137 Vals.push_back(cast<CmpInst>(I).getPredicate()); 1138 break; 1139 1140 case Instruction::Ret: 1141 { 1142 Code = bitc::FUNC_CODE_INST_RET; 1143 unsigned NumOperands = I.getNumOperands(); 1144 if (NumOperands == 0) 1145 AbbrevToUse = FUNCTION_INST_RET_VOID_ABBREV; 1146 else if (NumOperands == 1) { 1147 if (!PushValueAndType(I.getOperand(0), InstID, Vals, VE)) 1148 AbbrevToUse = FUNCTION_INST_RET_VAL_ABBREV; 1149 } else { 1150 for (unsigned i = 0, e = NumOperands; i != e; ++i) 1151 PushValueAndType(I.getOperand(i), InstID, Vals, VE); 1152 } 1153 } 1154 break; 1155 case Instruction::Br: 1156 { 1157 Code = bitc::FUNC_CODE_INST_BR; 1158 BranchInst &II = cast<BranchInst>(I); 1159 Vals.push_back(VE.getValueID(II.getSuccessor(0))); 1160 if (II.isConditional()) { 1161 Vals.push_back(VE.getValueID(II.getSuccessor(1))); 1162 Vals.push_back(VE.getValueID(II.getCondition())); 1163 } 1164 } 1165 break; 1166 case Instruction::Switch: 1167 { 1168 Code = bitc::FUNC_CODE_INST_SWITCH; 1169 SwitchInst &SI = cast<SwitchInst>(I); 1170 1171 Vals.push_back(VE.getTypeID(SI.getCondition()->getType())); 1172 Vals.push_back(VE.getValueID(SI.getCondition())); 1173 Vals.push_back(VE.getValueID(SI.getDefaultDest())); 1174 for (SwitchInst::CaseIt i = SI.case_begin(), e = SI.case_end(); 1175 i != e; ++i) { 1176 IntegersSubset& CaseRanges = i.getCaseValueEx(); 1177 1178 if (CaseRanges.isSingleNumber()) { 1179 Vals.push_back(VE.getValueID(CaseRanges.getSingleNumber(0).toConstantInt())); 1180 Vals.push_back(VE.getValueID(i.getCaseSuccessor())); 1181 } else if (CaseRanges.isSingleNumbersOnly()) { 1182 for (unsigned ri = 0, rn = CaseRanges.getNumItems(); 1183 ri != rn; ++ri) { 1184 Vals.push_back(VE.getValueID(CaseRanges.getSingleNumber(ri).toConstantInt())); 1185 Vals.push_back(VE.getValueID(i.getCaseSuccessor())); 1186 } 1187 } else { 1188 llvm_unreachable("Not single number?"); 1189 } 1190 } 1191 } 1192 break; 1193 case Instruction::IndirectBr: 1194 Code = bitc::FUNC_CODE_INST_INDIRECTBR; 1195 Vals.push_back(VE.getTypeID(I.getOperand(0)->getType())); 1196 for (unsigned i = 0, e = I.getNumOperands(); i != e; ++i) 1197 Vals.push_back(VE.getValueID(I.getOperand(i))); 1198 break; 1199 1200 case Instruction::Invoke: { 1201 const InvokeInst *II = cast<InvokeInst>(&I); 1202 const Value *Callee(II->getCalledValue()); 1203 PointerType *PTy = cast<PointerType>(Callee->getType()); 1204 FunctionType *FTy = cast<FunctionType>(PTy->getElementType()); 1205 Code = bitc::FUNC_CODE_INST_INVOKE; 1206 1207 Vals.push_back(VE.getAttributeID(II->getAttributes())); 1208 Vals.push_back(II->getCallingConv()); 1209 Vals.push_back(VE.getValueID(II->getNormalDest())); 1210 Vals.push_back(VE.getValueID(II->getUnwindDest())); 1211 PushValueAndType(Callee, InstID, Vals, VE); 1212 1213 // Emit value #'s for the fixed parameters. 1214 for (unsigned i = 0, e = FTy->getNumParams(); i != e; ++i) 1215 Vals.push_back(VE.getValueID(I.getOperand(i))); // fixed param. 1216 1217 // Emit type/value pairs for varargs params. 1218 if (FTy->isVarArg()) { 1219 for (unsigned i = FTy->getNumParams(), e = I.getNumOperands()-3; 1220 i != e; ++i) 1221 PushValueAndType(I.getOperand(i), InstID, Vals, VE); // vararg 1222 } 1223 break; 1224 } 1225 case Instruction::Unreachable: 1226 Code = bitc::FUNC_CODE_INST_UNREACHABLE; 1227 AbbrevToUse = FUNCTION_INST_UNREACHABLE_ABBREV; 1228 break; 1229 1230 case Instruction::PHI: { 1231 const PHINode &PN = cast<PHINode>(I); 1232 Code = bitc::FUNC_CODE_INST_PHI; 1233 Vals.push_back(VE.getTypeID(PN.getType())); 1234 for (unsigned i = 0, e = PN.getNumIncomingValues(); i != e; ++i) { 1235 Vals.push_back(VE.getValueID(PN.getIncomingValue(i))); 1236 Vals.push_back(VE.getValueID(PN.getIncomingBlock(i))); 1237 } 1238 break; 1239 } 1240 1241 case Instruction::Alloca: 1242 Code = bitc::FUNC_CODE_INST_ALLOCA; 1243 Vals.push_back(VE.getTypeID(I.getType())); 1244 Vals.push_back(VE.getTypeID(I.getOperand(0)->getType())); 1245 Vals.push_back(VE.getValueID(I.getOperand(0))); // size. 1246 Vals.push_back(Log2_32(cast<AllocaInst>(I).getAlignment())+1); 1247 break; 1248 1249 case Instruction::Load: 1250 Code = bitc::FUNC_CODE_INST_LOAD; 1251 if (!PushValueAndType(I.getOperand(0), InstID, Vals, VE)) // ptr 1252 AbbrevToUse = FUNCTION_INST_LOAD_ABBREV; 1253 1254 Vals.push_back(Log2_32(cast<LoadInst>(I).getAlignment())+1); 1255 Vals.push_back(cast<LoadInst>(I).isVolatile()); 1256 break; 1257 case Instruction::Store: 1258 Code = bitc::FUNC_CODE_INST_STORE; 1259 PushValueAndType(I.getOperand(1), InstID, Vals, VE); // ptrty + ptr 1260 Vals.push_back(VE.getValueID(I.getOperand(0))); // val. 1261 Vals.push_back(Log2_32(cast<StoreInst>(I).getAlignment())+1); 1262 Vals.push_back(cast<StoreInst>(I).isVolatile()); 1263 break; 1264 case Instruction::Call: { 1265 const CallInst &CI = cast<CallInst>(I); 1266 PointerType *PTy = cast<PointerType>(CI.getCalledValue()->getType()); 1267 FunctionType *FTy = cast<FunctionType>(PTy->getElementType()); 1268 1269 Code = FUNC_CODE_INST_CALL_2_7; 1270 1271 Vals.push_back(VE.getAttributeID(CI.getAttributes())); 1272 Vals.push_back((CI.getCallingConv() << 1) | unsigned(CI.isTailCall())); 1273 PushValueAndType(CI.getCalledValue(), InstID, Vals, VE); // Callee 1274 1275 // Emit value #'s for the fixed parameters. 1276 for (unsigned i = 0, e = FTy->getNumParams(); i != e; ++i) 1277 Vals.push_back(VE.getValueID(CI.getArgOperand(i))); // fixed param. 1278 1279 // Emit type/value pairs for varargs params. 1280 if (FTy->isVarArg()) { 1281 for (unsigned i = FTy->getNumParams(), e = CI.getNumArgOperands(); 1282 i != e; ++i) 1283 PushValueAndType(CI.getArgOperand(i), InstID, Vals, VE); // varargs 1284 } 1285 break; 1286 } 1287 case Instruction::VAArg: 1288 Code = bitc::FUNC_CODE_INST_VAARG; 1289 Vals.push_back(VE.getTypeID(I.getOperand(0)->getType())); // valistty 1290 Vals.push_back(VE.getValueID(I.getOperand(0))); // valist. 1291 Vals.push_back(VE.getTypeID(I.getType())); // restype. 1292 break; 1293 } 1294 1295 Stream.EmitRecord(Code, Vals, AbbrevToUse); 1296 Vals.clear(); 1297} 1298 1299// Emit names for globals/functions etc. 1300static void WriteValueSymbolTable(const ValueSymbolTable &VST, 1301 const llvm_2_9::ValueEnumerator &VE, 1302 BitstreamWriter &Stream) { 1303 if (VST.empty()) return; 1304 Stream.EnterSubblock(bitc::VALUE_SYMTAB_BLOCK_ID, 4); 1305 1306 // FIXME: Set up the abbrev, we know how many values there are! 1307 // FIXME: We know if the type names can use 7-bit ascii. 1308 SmallVector<unsigned, 64> NameVals; 1309 1310 for (ValueSymbolTable::const_iterator SI = VST.begin(), SE = VST.end(); 1311 SI != SE; ++SI) { 1312 1313 const ValueName &Name = *SI; 1314 1315 // Figure out the encoding to use for the name. 1316 bool is7Bit = true; 1317 bool isChar6 = true; 1318 for (const char *C = Name.getKeyData(), *E = C+Name.getKeyLength(); 1319 C != E; ++C) { 1320 if (isChar6) 1321 isChar6 = BitCodeAbbrevOp::isChar6(*C); 1322 if ((unsigned char)*C & 128) { 1323 is7Bit = false; 1324 break; // don't bother scanning the rest. 1325 } 1326 } 1327 1328 unsigned AbbrevToUse = VST_ENTRY_8_ABBREV; 1329 1330 // VST_ENTRY: [valueid, namechar x N] 1331 // VST_BBENTRY: [bbid, namechar x N] 1332 unsigned Code; 1333 if (isa<BasicBlock>(SI->getValue())) { 1334 Code = bitc::VST_CODE_BBENTRY; 1335 if (isChar6) 1336 AbbrevToUse = VST_BBENTRY_6_ABBREV; 1337 } else { 1338 Code = bitc::VST_CODE_ENTRY; 1339 if (isChar6) 1340 AbbrevToUse = VST_ENTRY_6_ABBREV; 1341 else if (is7Bit) 1342 AbbrevToUse = VST_ENTRY_7_ABBREV; 1343 } 1344 1345 NameVals.push_back(VE.getValueID(SI->getValue())); 1346 for (const char *P = Name.getKeyData(), 1347 *E = Name.getKeyData()+Name.getKeyLength(); P != E; ++P) 1348 NameVals.push_back((unsigned char)*P); 1349 1350 // Emit the finished record. 1351 Stream.EmitRecord(Code, NameVals, AbbrevToUse); 1352 NameVals.clear(); 1353 } 1354 Stream.ExitBlock(); 1355} 1356 1357/// WriteFunction - Emit a function body to the module stream. 1358static void WriteFunction(const Function &F, llvm_2_9::ValueEnumerator &VE, 1359 BitstreamWriter &Stream) { 1360 Stream.EnterSubblock(bitc::FUNCTION_BLOCK_ID, 4); 1361 VE.incorporateFunction(F); 1362 1363 SmallVector<unsigned, 64> Vals; 1364 1365 // Emit the number of basic blocks, so the reader can create them ahead of 1366 // time. 1367 Vals.push_back(VE.getBasicBlocks().size()); 1368 Stream.EmitRecord(bitc::FUNC_CODE_DECLAREBLOCKS, Vals); 1369 Vals.clear(); 1370 1371 // If there are function-local constants, emit them now. 1372 unsigned CstStart, CstEnd; 1373 VE.getFunctionConstantRange(CstStart, CstEnd); 1374 WriteConstants(CstStart, CstEnd, VE, Stream, false); 1375 1376 // If there is function-local metadata, emit it now. 1377 WriteFunctionLocalMetadata(F, VE, Stream); 1378 1379 // Keep a running idea of what the instruction ID is. 1380 unsigned InstID = CstEnd; 1381 1382 bool NeedsMetadataAttachment = false; 1383 1384 DebugLoc LastDL; 1385 1386 // Finally, emit all the instructions, in order. 1387 for (Function::const_iterator BB = F.begin(), E = F.end(); BB != E; ++BB) 1388 for (BasicBlock::const_iterator I = BB->begin(), E = BB->end(); 1389 I != E; ++I) { 1390 WriteInstruction(*I, InstID, VE, Stream, Vals); 1391 1392 if (!I->getType()->isVoidTy()) 1393 ++InstID; 1394 1395 // If the instruction has metadata, write a metadata attachment later. 1396 NeedsMetadataAttachment |= I->hasMetadataOtherThanDebugLoc(); 1397 1398 // If the instruction has a debug location, emit it. 1399 DebugLoc DL = I->getDebugLoc(); 1400 if (DL.isUnknown()) { 1401 // nothing todo. 1402 } else if (DL == LastDL) { 1403 // Just repeat the same debug loc as last time. 1404 Stream.EmitRecord(bitc::FUNC_CODE_DEBUG_LOC_AGAIN, Vals); 1405 } else { 1406 MDNode *Scope, *IA; 1407 DL.getScopeAndInlinedAt(Scope, IA, I->getContext()); 1408 1409 Vals.push_back(DL.getLine()); 1410 Vals.push_back(DL.getCol()); 1411 Vals.push_back(Scope ? VE.getValueID(Scope)+1 : 0); 1412 Vals.push_back(IA ? VE.getValueID(IA)+1 : 0); 1413 Stream.EmitRecord(FUNC_CODE_DEBUG_LOC_2_7, Vals); 1414 Vals.clear(); 1415 1416 LastDL = DL; 1417 } 1418 } 1419 1420 // Emit names for all the instructions etc. 1421 WriteValueSymbolTable(F.getValueSymbolTable(), VE, Stream); 1422 1423 if (NeedsMetadataAttachment) 1424 WriteMetadataAttachment(F, VE, Stream); 1425 VE.purgeFunction(); 1426 Stream.ExitBlock(); 1427} 1428 1429// Emit blockinfo, which defines the standard abbreviations etc. 1430static void WriteBlockInfo(const llvm_2_9::ValueEnumerator &VE, 1431 BitstreamWriter &Stream) { 1432 // We only want to emit block info records for blocks that have multiple 1433 // instances: CONSTANTS_BLOCK, FUNCTION_BLOCK and VALUE_SYMTAB_BLOCK. Other 1434 // blocks can defined their abbrevs inline. 1435 Stream.EnterBlockInfoBlock(2); 1436 1437 { // 8-bit fixed-width VST_ENTRY/VST_BBENTRY strings. 1438 BitCodeAbbrev *Abbv = new BitCodeAbbrev(); 1439 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 3)); 1440 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8)); 1441 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array)); 1442 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 8)); 1443 if (Stream.EmitBlockInfoAbbrev(bitc::VALUE_SYMTAB_BLOCK_ID, 1444 Abbv) != VST_ENTRY_8_ABBREV) 1445 llvm_unreachable("Unexpected abbrev ordering!"); 1446 } 1447 1448 { // 7-bit fixed width VST_ENTRY strings. 1449 BitCodeAbbrev *Abbv = new BitCodeAbbrev(); 1450 Abbv->Add(BitCodeAbbrevOp(bitc::VST_CODE_ENTRY)); 1451 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8)); 1452 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array)); 1453 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 7)); 1454 if (Stream.EmitBlockInfoAbbrev(bitc::VALUE_SYMTAB_BLOCK_ID, 1455 Abbv) != VST_ENTRY_7_ABBREV) 1456 llvm_unreachable("Unexpected abbrev ordering!"); 1457 } 1458 { // 6-bit char6 VST_ENTRY strings. 1459 BitCodeAbbrev *Abbv = new BitCodeAbbrev(); 1460 Abbv->Add(BitCodeAbbrevOp(bitc::VST_CODE_ENTRY)); 1461 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8)); 1462 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array)); 1463 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Char6)); 1464 if (Stream.EmitBlockInfoAbbrev(bitc::VALUE_SYMTAB_BLOCK_ID, 1465 Abbv) != VST_ENTRY_6_ABBREV) 1466 llvm_unreachable("Unexpected abbrev ordering!"); 1467 } 1468 { // 6-bit char6 VST_BBENTRY strings. 1469 BitCodeAbbrev *Abbv = new BitCodeAbbrev(); 1470 Abbv->Add(BitCodeAbbrevOp(bitc::VST_CODE_BBENTRY)); 1471 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8)); 1472 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array)); 1473 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Char6)); 1474 if (Stream.EmitBlockInfoAbbrev(bitc::VALUE_SYMTAB_BLOCK_ID, 1475 Abbv) != VST_BBENTRY_6_ABBREV) 1476 llvm_unreachable("Unexpected abbrev ordering!"); 1477 } 1478 1479 1480 1481 { // SETTYPE abbrev for CONSTANTS_BLOCK. 1482 BitCodeAbbrev *Abbv = new BitCodeAbbrev(); 1483 Abbv->Add(BitCodeAbbrevOp(bitc::CST_CODE_SETTYPE)); 1484 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1485 Log2_32_Ceil(VE.getTypes().size()+1))); 1486 if (Stream.EmitBlockInfoAbbrev(bitc::CONSTANTS_BLOCK_ID, 1487 Abbv) != CONSTANTS_SETTYPE_ABBREV) 1488 llvm_unreachable("Unexpected abbrev ordering!"); 1489 } 1490 1491 { // INTEGER abbrev for CONSTANTS_BLOCK. 1492 BitCodeAbbrev *Abbv = new BitCodeAbbrev(); 1493 Abbv->Add(BitCodeAbbrevOp(bitc::CST_CODE_INTEGER)); 1494 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8)); 1495 if (Stream.EmitBlockInfoAbbrev(bitc::CONSTANTS_BLOCK_ID, 1496 Abbv) != CONSTANTS_INTEGER_ABBREV) 1497 llvm_unreachable("Unexpected abbrev ordering!"); 1498 } 1499 1500 { // CE_CAST abbrev for CONSTANTS_BLOCK. 1501 BitCodeAbbrev *Abbv = new BitCodeAbbrev(); 1502 Abbv->Add(BitCodeAbbrevOp(bitc::CST_CODE_CE_CAST)); 1503 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 4)); // cast opc 1504 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, // typeid 1505 Log2_32_Ceil(VE.getTypes().size()+1))); 1506 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8)); // value id 1507 1508 if (Stream.EmitBlockInfoAbbrev(bitc::CONSTANTS_BLOCK_ID, 1509 Abbv) != CONSTANTS_CE_CAST_Abbrev) 1510 llvm_unreachable("Unexpected abbrev ordering!"); 1511 } 1512 { // NULL abbrev for CONSTANTS_BLOCK. 1513 BitCodeAbbrev *Abbv = new BitCodeAbbrev(); 1514 Abbv->Add(BitCodeAbbrevOp(bitc::CST_CODE_NULL)); 1515 if (Stream.EmitBlockInfoAbbrev(bitc::CONSTANTS_BLOCK_ID, 1516 Abbv) != CONSTANTS_NULL_Abbrev) 1517 llvm_unreachable("Unexpected abbrev ordering!"); 1518 } 1519 1520 // FIXME: This should only use space for first class types! 1521 1522 { // INST_LOAD abbrev for FUNCTION_BLOCK. 1523 BitCodeAbbrev *Abbv = new BitCodeAbbrev(); 1524 Abbv->Add(BitCodeAbbrevOp(bitc::FUNC_CODE_INST_LOAD)); 1525 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Ptr 1526 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 4)); // Align 1527 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // volatile 1528 if (Stream.EmitBlockInfoAbbrev(bitc::FUNCTION_BLOCK_ID, 1529 Abbv) != FUNCTION_INST_LOAD_ABBREV) 1530 llvm_unreachable("Unexpected abbrev ordering!"); 1531 } 1532 { // INST_BINOP abbrev for FUNCTION_BLOCK. 1533 BitCodeAbbrev *Abbv = new BitCodeAbbrev(); 1534 Abbv->Add(BitCodeAbbrevOp(bitc::FUNC_CODE_INST_BINOP)); 1535 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // LHS 1536 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // RHS 1537 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 4)); // opc 1538 if (Stream.EmitBlockInfoAbbrev(bitc::FUNCTION_BLOCK_ID, 1539 Abbv) != FUNCTION_INST_BINOP_ABBREV) 1540 llvm_unreachable("Unexpected abbrev ordering!"); 1541 } 1542 { // INST_BINOP_FLAGS abbrev for FUNCTION_BLOCK. 1543 BitCodeAbbrev *Abbv = new BitCodeAbbrev(); 1544 Abbv->Add(BitCodeAbbrevOp(bitc::FUNC_CODE_INST_BINOP)); 1545 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // LHS 1546 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // RHS 1547 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 4)); // opc 1548 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 7)); // flags 1549 if (Stream.EmitBlockInfoAbbrev(bitc::FUNCTION_BLOCK_ID, 1550 Abbv) != FUNCTION_INST_BINOP_FLAGS_ABBREV) 1551 llvm_unreachable("Unexpected abbrev ordering!"); 1552 } 1553 { // INST_CAST abbrev for FUNCTION_BLOCK. 1554 BitCodeAbbrev *Abbv = new BitCodeAbbrev(); 1555 Abbv->Add(BitCodeAbbrevOp(bitc::FUNC_CODE_INST_CAST)); 1556 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // OpVal 1557 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, // dest ty 1558 Log2_32_Ceil(VE.getTypes().size()+1))); 1559 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 4)); // opc 1560 if (Stream.EmitBlockInfoAbbrev(bitc::FUNCTION_BLOCK_ID, 1561 Abbv) != FUNCTION_INST_CAST_ABBREV) 1562 llvm_unreachable("Unexpected abbrev ordering!"); 1563 } 1564 1565 { // INST_RET abbrev for FUNCTION_BLOCK. 1566 BitCodeAbbrev *Abbv = new BitCodeAbbrev(); 1567 Abbv->Add(BitCodeAbbrevOp(bitc::FUNC_CODE_INST_RET)); 1568 if (Stream.EmitBlockInfoAbbrev(bitc::FUNCTION_BLOCK_ID, 1569 Abbv) != FUNCTION_INST_RET_VOID_ABBREV) 1570 llvm_unreachable("Unexpected abbrev ordering!"); 1571 } 1572 { // INST_RET abbrev for FUNCTION_BLOCK. 1573 BitCodeAbbrev *Abbv = new BitCodeAbbrev(); 1574 Abbv->Add(BitCodeAbbrevOp(bitc::FUNC_CODE_INST_RET)); 1575 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // ValID 1576 if (Stream.EmitBlockInfoAbbrev(bitc::FUNCTION_BLOCK_ID, 1577 Abbv) != FUNCTION_INST_RET_VAL_ABBREV) 1578 llvm_unreachable("Unexpected abbrev ordering!"); 1579 } 1580 { // INST_UNREACHABLE abbrev for FUNCTION_BLOCK. 1581 BitCodeAbbrev *Abbv = new BitCodeAbbrev(); 1582 Abbv->Add(BitCodeAbbrevOp(bitc::FUNC_CODE_INST_UNREACHABLE)); 1583 if (Stream.EmitBlockInfoAbbrev(bitc::FUNCTION_BLOCK_ID, 1584 Abbv) != FUNCTION_INST_UNREACHABLE_ABBREV) 1585 llvm_unreachable("Unexpected abbrev ordering!"); 1586 } 1587 1588 Stream.ExitBlock(); 1589} 1590 1591 1592/// WriteModule - Emit the specified module to the bitstream. 1593static void WriteModule(const Module *M, BitstreamWriter &Stream) { 1594 Stream.EnterSubblock(bitc::MODULE_BLOCK_ID, 3); 1595 1596 // Emit the version number if it is non-zero. 1597 if (CurVersion) { 1598 SmallVector<unsigned, 1> Vals; 1599 Vals.push_back(CurVersion); 1600 Stream.EmitRecord(bitc::MODULE_CODE_VERSION, Vals); 1601 } 1602 1603 // Analyze the module, enumerating globals, functions, etc. 1604 llvm_2_9::ValueEnumerator VE(M); 1605 1606 // Emit blockinfo, which defines the standard abbreviations etc. 1607 WriteBlockInfo(VE, Stream); 1608 1609 // Emit information about parameter attributes. 1610 WriteAttributeTable(VE, Stream); 1611 1612 // Emit information describing all of the types in the module. 1613 WriteTypeTable(VE, Stream); 1614 1615 // Emit top-level description of module, including target triple, inline asm, 1616 // descriptors for global variables, and function prototype info. 1617 WriteModuleInfo(M, VE, Stream); 1618 1619 // Emit constants. 1620 WriteModuleConstants(VE, Stream); 1621 1622 // Emit metadata. 1623 WriteModuleMetadata(M, VE, Stream); 1624 1625 // Emit function bodies. 1626 for (Module::const_iterator F = M->begin(), E = M->end(); F != E; ++F) 1627 if (!F->isDeclaration()) 1628 WriteFunction(*F, VE, Stream); 1629 1630 // Emit metadata. 1631 WriteModuleMetadataStore(M, Stream); 1632 1633 // Emit names for globals/functions etc. 1634 WriteValueSymbolTable(M->getValueSymbolTable(), VE, Stream); 1635 1636 Stream.ExitBlock(); 1637} 1638 1639/// EmitDarwinBCHeader - If generating a bc file on darwin, we have to emit a 1640/// header and trailer to make it compatible with the system archiver. To do 1641/// this we emit the following header, and then emit a trailer that pads the 1642/// file out to be a multiple of 16 bytes. 1643/// 1644/// struct bc_header { 1645/// uint32_t Magic; // 0x0B17C0DE 1646/// uint32_t Version; // Version, currently always 0. 1647/// uint32_t BitcodeOffset; // Offset to traditional bitcode file. 1648/// uint32_t BitcodeSize; // Size of traditional bitcode file. 1649/// uint32_t CPUType; // CPU specifier. 1650/// ... potentially more later ... 1651/// }; 1652enum { 1653 DarwinBCSizeFieldOffset = 3*4, // Offset to bitcode_size. 1654 DarwinBCHeaderSize = 5*4 1655}; 1656 1657static void WriteInt32ToBuffer(uint32_t Value, SmallVectorImpl<char> &Buffer, 1658 uint32_t &Position) { 1659 Buffer[Position + 0] = (unsigned char) (Value >> 0); 1660 Buffer[Position + 1] = (unsigned char) (Value >> 8); 1661 Buffer[Position + 2] = (unsigned char) (Value >> 16); 1662 Buffer[Position + 3] = (unsigned char) (Value >> 24); 1663 Position += 4; 1664} 1665 1666static void EmitDarwinBCHeaderAndTrailer(SmallVectorImpl<char> &Buffer, 1667 const Triple &TT) { 1668 unsigned CPUType = ~0U; 1669 1670 // Match x86_64-*, i[3-9]86-*, powerpc-*, powerpc64-*, arm-*, thumb-*, 1671 // armv[0-9]-*, thumbv[0-9]-*, armv5te-*, or armv6t2-*. The CPUType is a magic 1672 // number from /usr/include/mach/machine.h. It is ok to reproduce the 1673 // specific constants here because they are implicitly part of the Darwin ABI. 1674 enum { 1675 DARWIN_CPU_ARCH_ABI64 = 0x01000000, 1676 DARWIN_CPU_TYPE_X86 = 7, 1677 DARWIN_CPU_TYPE_ARM = 12, 1678 DARWIN_CPU_TYPE_POWERPC = 18 1679 }; 1680 1681 Triple::ArchType Arch = TT.getArch(); 1682 if (Arch == Triple::x86_64) 1683 CPUType = DARWIN_CPU_TYPE_X86 | DARWIN_CPU_ARCH_ABI64; 1684 else if (Arch == Triple::x86) 1685 CPUType = DARWIN_CPU_TYPE_X86; 1686 else if (Arch == Triple::ppc) 1687 CPUType = DARWIN_CPU_TYPE_POWERPC; 1688 else if (Arch == Triple::ppc64) 1689 CPUType = DARWIN_CPU_TYPE_POWERPC | DARWIN_CPU_ARCH_ABI64; 1690 else if (Arch == Triple::arm || Arch == Triple::thumb) 1691 CPUType = DARWIN_CPU_TYPE_ARM; 1692 1693 // Traditional Bitcode starts after header. 1694 assert(Buffer.size() >= DarwinBCHeaderSize && 1695 "Expected header size to be reserved"); 1696 unsigned BCOffset = DarwinBCHeaderSize; 1697 unsigned BCSize = Buffer.size()-DarwinBCHeaderSize; 1698 1699 // Write the magic and version. 1700 unsigned Position = 0; 1701 WriteInt32ToBuffer(0x0B17C0DE , Buffer, Position); 1702 WriteInt32ToBuffer(0 , Buffer, Position); // Version. 1703 WriteInt32ToBuffer(BCOffset , Buffer, Position); 1704 WriteInt32ToBuffer(BCSize , Buffer, Position); 1705 WriteInt32ToBuffer(CPUType , Buffer, Position); 1706 1707 // If the file is not a multiple of 16 bytes, insert dummy padding. 1708 while (Buffer.size() & 15) 1709 Buffer.push_back(0); 1710} 1711 1712/// WriteBitcodeToFile - Write the specified module to the specified output 1713/// stream. 1714void llvm_2_9::WriteBitcodeToFile(const Module *M, raw_ostream &Out) { 1715 SmallVector<char, 1024> Buffer; 1716 Buffer.reserve(256*1024); 1717 1718 // If this is darwin or another generic macho target, reserve space for the 1719 // header. 1720 Triple TT(M->getTargetTriple()); 1721 if (TT.isOSDarwin()) 1722 Buffer.insert(Buffer.begin(), DarwinBCHeaderSize, 0); 1723 1724 // Emit the module into the buffer. 1725 { 1726 BitstreamWriter Stream(Buffer); 1727 1728 // Emit the file header. 1729 Stream.Emit((unsigned)'B', 8); 1730 Stream.Emit((unsigned)'C', 8); 1731 Stream.Emit(0x0, 4); 1732 Stream.Emit(0xC, 4); 1733 Stream.Emit(0xE, 4); 1734 Stream.Emit(0xD, 4); 1735 1736 // Emit the module. 1737 WriteModule(M, Stream); 1738 } 1739 1740 if (TT.isOSDarwin()) 1741 EmitDarwinBCHeaderAndTrailer(Buffer, TT); 1742 1743 // Write the generated bitstream to "Out". 1744 Out.write((char*)&Buffer.front(), Buffer.size()); 1745} 1746