1 //===--- Bitcode/Writer/BitcodeWriter.cpp - Bitcode Writer ----------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // Bitcode writer implementation.
12 //===----------------------------------------------------------------------===//
14 #include "llvm/Bitcode/ReaderWriter.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/DebugInfoMetadata.h"
21 #include "llvm/IR/DerivedTypes.h"
22 #include "llvm/IR/InlineAsm.h"
23 #include "llvm/IR/Instructions.h"
24 #include "llvm/IR/Module.h"
25 #include "llvm/IR/Operator.h"
26 #include "llvm/IR/UseListOrder.h"
27 #include "llvm/IR/ValueSymbolTable.h"
28 #include "llvm/Support/CommandLine.h"
29 #include "llvm/Support/ErrorHandling.h"
30 #include "llvm/Support/MathExtras.h"
31 #include "llvm/Support/Program.h"
32 #include "llvm/Support/raw_ostream.h"
37 /// These are manifest constants used by the bitcode writer. They do not need to
38 /// be kept in sync with the reader, but need to be consistent within this file.
40 // VALUE_SYMTAB_BLOCK abbrev id's.
41 VST_ENTRY_8_ABBREV = bitc::FIRST_APPLICATION_ABBREV,
46 // CONSTANTS_BLOCK abbrev id's.
47 CONSTANTS_SETTYPE_ABBREV = bitc::FIRST_APPLICATION_ABBREV,
48 CONSTANTS_INTEGER_ABBREV,
49 CONSTANTS_CE_CAST_Abbrev,
50 CONSTANTS_NULL_Abbrev,
52 // FUNCTION_BLOCK abbrev id's.
53 FUNCTION_INST_LOAD_ABBREV = bitc::FIRST_APPLICATION_ABBREV,
54 FUNCTION_INST_BINOP_ABBREV,
55 FUNCTION_INST_BINOP_FLAGS_ABBREV,
56 FUNCTION_INST_CAST_ABBREV,
57 FUNCTION_INST_RET_VOID_ABBREV,
58 FUNCTION_INST_RET_VAL_ABBREV,
59 FUNCTION_INST_UNREACHABLE_ABBREV,
60 FUNCTION_INST_GEP_ABBREV,
63 static unsigned GetEncodedCastOpcode(unsigned Opcode) {
65 default: llvm_unreachable("Unknown cast instruction!");
66 case Instruction::Trunc : return bitc::CAST_TRUNC;
67 case Instruction::ZExt : return bitc::CAST_ZEXT;
68 case Instruction::SExt : return bitc::CAST_SEXT;
69 case Instruction::FPToUI : return bitc::CAST_FPTOUI;
70 case Instruction::FPToSI : return bitc::CAST_FPTOSI;
71 case Instruction::UIToFP : return bitc::CAST_UITOFP;
72 case Instruction::SIToFP : return bitc::CAST_SITOFP;
73 case Instruction::FPTrunc : return bitc::CAST_FPTRUNC;
74 case Instruction::FPExt : return bitc::CAST_FPEXT;
75 case Instruction::PtrToInt: return bitc::CAST_PTRTOINT;
76 case Instruction::IntToPtr: return bitc::CAST_INTTOPTR;
77 case Instruction::BitCast : return bitc::CAST_BITCAST;
78 case Instruction::AddrSpaceCast: return bitc::CAST_ADDRSPACECAST;
82 static unsigned GetEncodedBinaryOpcode(unsigned Opcode) {
84 default: llvm_unreachable("Unknown binary instruction!");
85 case Instruction::Add:
86 case Instruction::FAdd: return bitc::BINOP_ADD;
87 case Instruction::Sub:
88 case Instruction::FSub: return bitc::BINOP_SUB;
89 case Instruction::Mul:
90 case Instruction::FMul: return bitc::BINOP_MUL;
91 case Instruction::UDiv: return bitc::BINOP_UDIV;
92 case Instruction::FDiv:
93 case Instruction::SDiv: return bitc::BINOP_SDIV;
94 case Instruction::URem: return bitc::BINOP_UREM;
95 case Instruction::FRem:
96 case Instruction::SRem: return bitc::BINOP_SREM;
97 case Instruction::Shl: return bitc::BINOP_SHL;
98 case Instruction::LShr: return bitc::BINOP_LSHR;
99 case Instruction::AShr: return bitc::BINOP_ASHR;
100 case Instruction::And: return bitc::BINOP_AND;
101 case Instruction::Or: return bitc::BINOP_OR;
102 case Instruction::Xor: return bitc::BINOP_XOR;
106 static unsigned GetEncodedRMWOperation(AtomicRMWInst::BinOp Op) {
108 default: llvm_unreachable("Unknown RMW operation!");
109 case AtomicRMWInst::Xchg: return bitc::RMW_XCHG;
110 case AtomicRMWInst::Add: return bitc::RMW_ADD;
111 case AtomicRMWInst::Sub: return bitc::RMW_SUB;
112 case AtomicRMWInst::And: return bitc::RMW_AND;
113 case AtomicRMWInst::Nand: return bitc::RMW_NAND;
114 case AtomicRMWInst::Or: return bitc::RMW_OR;
115 case AtomicRMWInst::Xor: return bitc::RMW_XOR;
116 case AtomicRMWInst::Max: return bitc::RMW_MAX;
117 case AtomicRMWInst::Min: return bitc::RMW_MIN;
118 case AtomicRMWInst::UMax: return bitc::RMW_UMAX;
119 case AtomicRMWInst::UMin: return bitc::RMW_UMIN;
123 static unsigned GetEncodedOrdering(AtomicOrdering Ordering) {
125 case NotAtomic: return bitc::ORDERING_NOTATOMIC;
126 case Unordered: return bitc::ORDERING_UNORDERED;
127 case Monotonic: return bitc::ORDERING_MONOTONIC;
128 case Acquire: return bitc::ORDERING_ACQUIRE;
129 case Release: return bitc::ORDERING_RELEASE;
130 case AcquireRelease: return bitc::ORDERING_ACQREL;
131 case SequentiallyConsistent: return bitc::ORDERING_SEQCST;
133 llvm_unreachable("Invalid ordering");
136 static unsigned GetEncodedSynchScope(SynchronizationScope SynchScope) {
137 switch (SynchScope) {
138 case SingleThread: return bitc::SYNCHSCOPE_SINGLETHREAD;
139 case CrossThread: return bitc::SYNCHSCOPE_CROSSTHREAD;
141 llvm_unreachable("Invalid synch scope");
144 static void WriteStringRecord(unsigned Code, StringRef Str,
145 unsigned AbbrevToUse, BitstreamWriter &Stream) {
146 SmallVector<unsigned, 64> Vals;
148 // Code: [strchar x N]
149 for (unsigned i = 0, e = Str.size(); i != e; ++i) {
150 if (AbbrevToUse && !BitCodeAbbrevOp::isChar6(Str[i]))
152 Vals.push_back(Str[i]);
155 // Emit the finished record.
156 Stream.EmitRecord(Code, Vals, AbbrevToUse);
159 static uint64_t getAttrKindEncoding(Attribute::AttrKind Kind) {
161 case Attribute::Alignment:
162 return bitc::ATTR_KIND_ALIGNMENT;
163 case Attribute::AlwaysInline:
164 return bitc::ATTR_KIND_ALWAYS_INLINE;
165 case Attribute::Builtin:
166 return bitc::ATTR_KIND_BUILTIN;
167 case Attribute::ByVal:
168 return bitc::ATTR_KIND_BY_VAL;
169 case Attribute::Convergent:
170 return bitc::ATTR_KIND_CONVERGENT;
171 case Attribute::InAlloca:
172 return bitc::ATTR_KIND_IN_ALLOCA;
173 case Attribute::Cold:
174 return bitc::ATTR_KIND_COLD;
175 case Attribute::InlineHint:
176 return bitc::ATTR_KIND_INLINE_HINT;
177 case Attribute::InReg:
178 return bitc::ATTR_KIND_IN_REG;
179 case Attribute::JumpTable:
180 return bitc::ATTR_KIND_JUMP_TABLE;
181 case Attribute::MinSize:
182 return bitc::ATTR_KIND_MIN_SIZE;
183 case Attribute::Naked:
184 return bitc::ATTR_KIND_NAKED;
185 case Attribute::Nest:
186 return bitc::ATTR_KIND_NEST;
187 case Attribute::NoAlias:
188 return bitc::ATTR_KIND_NO_ALIAS;
189 case Attribute::NoBuiltin:
190 return bitc::ATTR_KIND_NO_BUILTIN;
191 case Attribute::NoCapture:
192 return bitc::ATTR_KIND_NO_CAPTURE;
193 case Attribute::NoDuplicate:
194 return bitc::ATTR_KIND_NO_DUPLICATE;
195 case Attribute::NoImplicitFloat:
196 return bitc::ATTR_KIND_NO_IMPLICIT_FLOAT;
197 case Attribute::NoInline:
198 return bitc::ATTR_KIND_NO_INLINE;
199 case Attribute::NonLazyBind:
200 return bitc::ATTR_KIND_NON_LAZY_BIND;
201 case Attribute::NonNull:
202 return bitc::ATTR_KIND_NON_NULL;
203 case Attribute::Dereferenceable:
204 return bitc::ATTR_KIND_DEREFERENCEABLE;
205 case Attribute::DereferenceableOrNull:
206 return bitc::ATTR_KIND_DEREFERENCEABLE_OR_NULL;
207 case Attribute::NoRedZone:
208 return bitc::ATTR_KIND_NO_RED_ZONE;
209 case Attribute::NoReturn:
210 return bitc::ATTR_KIND_NO_RETURN;
211 case Attribute::NoUnwind:
212 return bitc::ATTR_KIND_NO_UNWIND;
213 case Attribute::OptimizeForSize:
214 return bitc::ATTR_KIND_OPTIMIZE_FOR_SIZE;
215 case Attribute::OptimizeNone:
216 return bitc::ATTR_KIND_OPTIMIZE_NONE;
217 case Attribute::ReadNone:
218 return bitc::ATTR_KIND_READ_NONE;
219 case Attribute::ReadOnly:
220 return bitc::ATTR_KIND_READ_ONLY;
221 case Attribute::Returned:
222 return bitc::ATTR_KIND_RETURNED;
223 case Attribute::ReturnsTwice:
224 return bitc::ATTR_KIND_RETURNS_TWICE;
225 case Attribute::SExt:
226 return bitc::ATTR_KIND_S_EXT;
227 case Attribute::StackAlignment:
228 return bitc::ATTR_KIND_STACK_ALIGNMENT;
229 case Attribute::StackProtect:
230 return bitc::ATTR_KIND_STACK_PROTECT;
231 case Attribute::StackProtectReq:
232 return bitc::ATTR_KIND_STACK_PROTECT_REQ;
233 case Attribute::StackProtectStrong:
234 return bitc::ATTR_KIND_STACK_PROTECT_STRONG;
235 case Attribute::SafeStack:
236 return bitc::ATTR_KIND_SAFESTACK;
237 case Attribute::StructRet:
238 return bitc::ATTR_KIND_STRUCT_RET;
239 case Attribute::SanitizeAddress:
240 return bitc::ATTR_KIND_SANITIZE_ADDRESS;
241 case Attribute::SanitizeThread:
242 return bitc::ATTR_KIND_SANITIZE_THREAD;
243 case Attribute::SanitizeMemory:
244 return bitc::ATTR_KIND_SANITIZE_MEMORY;
245 case Attribute::UWTable:
246 return bitc::ATTR_KIND_UW_TABLE;
247 case Attribute::ZExt:
248 return bitc::ATTR_KIND_Z_EXT;
249 case Attribute::EndAttrKinds:
250 llvm_unreachable("Can not encode end-attribute kinds marker.");
251 case Attribute::None:
252 llvm_unreachable("Can not encode none-attribute.");
255 llvm_unreachable("Trying to encode unknown attribute");
258 static void WriteAttributeGroupTable(const ValueEnumerator &VE,
259 BitstreamWriter &Stream) {
260 const std::vector<AttributeSet> &AttrGrps = VE.getAttributeGroups();
261 if (AttrGrps.empty()) return;
263 Stream.EnterSubblock(bitc::PARAMATTR_GROUP_BLOCK_ID, 3);
265 SmallVector<uint64_t, 64> Record;
266 for (unsigned i = 0, e = AttrGrps.size(); i != e; ++i) {
267 AttributeSet AS = AttrGrps[i];
268 for (unsigned i = 0, e = AS.getNumSlots(); i != e; ++i) {
269 AttributeSet A = AS.getSlotAttributes(i);
271 Record.push_back(VE.getAttributeGroupID(A));
272 Record.push_back(AS.getSlotIndex(i));
274 for (AttributeSet::iterator I = AS.begin(0), E = AS.end(0);
277 if (Attr.isEnumAttribute()) {
279 Record.push_back(getAttrKindEncoding(Attr.getKindAsEnum()));
280 } else if (Attr.isIntAttribute()) {
282 Record.push_back(getAttrKindEncoding(Attr.getKindAsEnum()));
283 Record.push_back(Attr.getValueAsInt());
285 StringRef Kind = Attr.getKindAsString();
286 StringRef Val = Attr.getValueAsString();
288 Record.push_back(Val.empty() ? 3 : 4);
289 Record.append(Kind.begin(), Kind.end());
292 Record.append(Val.begin(), Val.end());
298 Stream.EmitRecord(bitc::PARAMATTR_GRP_CODE_ENTRY, Record);
306 static void WriteAttributeTable(const ValueEnumerator &VE,
307 BitstreamWriter &Stream) {
308 const std::vector<AttributeSet> &Attrs = VE.getAttributes();
309 if (Attrs.empty()) return;
311 Stream.EnterSubblock(bitc::PARAMATTR_BLOCK_ID, 3);
313 SmallVector<uint64_t, 64> Record;
314 for (unsigned i = 0, e = Attrs.size(); i != e; ++i) {
315 const AttributeSet &A = Attrs[i];
316 for (unsigned i = 0, e = A.getNumSlots(); i != e; ++i)
317 Record.push_back(VE.getAttributeGroupID(A.getSlotAttributes(i)));
319 Stream.EmitRecord(bitc::PARAMATTR_CODE_ENTRY, Record);
326 /// WriteTypeTable - Write out the type table for a module.
327 static void WriteTypeTable(const ValueEnumerator &VE, BitstreamWriter &Stream) {
328 const ValueEnumerator::TypeList &TypeList = VE.getTypes();
330 Stream.EnterSubblock(bitc::TYPE_BLOCK_ID_NEW, 4 /*count from # abbrevs */);
331 SmallVector<uint64_t, 64> TypeVals;
333 uint64_t NumBits = VE.computeBitsRequiredForTypeIndicies();
335 // Abbrev for TYPE_CODE_POINTER.
336 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
337 Abbv->Add(BitCodeAbbrevOp(bitc::TYPE_CODE_POINTER));
338 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, NumBits));
339 Abbv->Add(BitCodeAbbrevOp(0)); // Addrspace = 0
340 unsigned PtrAbbrev = Stream.EmitAbbrev(Abbv);
342 // Abbrev for TYPE_CODE_FUNCTION.
343 Abbv = new BitCodeAbbrev();
344 Abbv->Add(BitCodeAbbrevOp(bitc::TYPE_CODE_FUNCTION));
345 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // isvararg
346 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
347 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, NumBits));
349 unsigned FunctionAbbrev = Stream.EmitAbbrev(Abbv);
351 // Abbrev for TYPE_CODE_STRUCT_ANON.
352 Abbv = new BitCodeAbbrev();
353 Abbv->Add(BitCodeAbbrevOp(bitc::TYPE_CODE_STRUCT_ANON));
354 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // ispacked
355 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
356 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, NumBits));
358 unsigned StructAnonAbbrev = Stream.EmitAbbrev(Abbv);
360 // Abbrev for TYPE_CODE_STRUCT_NAME.
361 Abbv = new BitCodeAbbrev();
362 Abbv->Add(BitCodeAbbrevOp(bitc::TYPE_CODE_STRUCT_NAME));
363 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
364 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Char6));
365 unsigned StructNameAbbrev = Stream.EmitAbbrev(Abbv);
367 // Abbrev for TYPE_CODE_STRUCT_NAMED.
368 Abbv = new BitCodeAbbrev();
369 Abbv->Add(BitCodeAbbrevOp(bitc::TYPE_CODE_STRUCT_NAMED));
370 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // ispacked
371 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
372 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, NumBits));
374 unsigned StructNamedAbbrev = Stream.EmitAbbrev(Abbv);
376 // Abbrev for TYPE_CODE_ARRAY.
377 Abbv = new BitCodeAbbrev();
378 Abbv->Add(BitCodeAbbrevOp(bitc::TYPE_CODE_ARRAY));
379 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8)); // size
380 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, NumBits));
382 unsigned ArrayAbbrev = Stream.EmitAbbrev(Abbv);
384 // Emit an entry count so the reader can reserve space.
385 TypeVals.push_back(TypeList.size());
386 Stream.EmitRecord(bitc::TYPE_CODE_NUMENTRY, TypeVals);
389 // Loop over all of the types, emitting each in turn.
390 for (unsigned i = 0, e = TypeList.size(); i != e; ++i) {
391 Type *T = TypeList[i];
395 switch (T->getTypeID()) {
396 case Type::VoidTyID: Code = bitc::TYPE_CODE_VOID; break;
397 case Type::HalfTyID: Code = bitc::TYPE_CODE_HALF; break;
398 case Type::FloatTyID: Code = bitc::TYPE_CODE_FLOAT; break;
399 case Type::DoubleTyID: Code = bitc::TYPE_CODE_DOUBLE; break;
400 case Type::X86_FP80TyID: Code = bitc::TYPE_CODE_X86_FP80; break;
401 case Type::FP128TyID: Code = bitc::TYPE_CODE_FP128; break;
402 case Type::PPC_FP128TyID: Code = bitc::TYPE_CODE_PPC_FP128; break;
403 case Type::LabelTyID: Code = bitc::TYPE_CODE_LABEL; break;
404 case Type::MetadataTyID: Code = bitc::TYPE_CODE_METADATA; break;
405 case Type::X86_MMXTyID: Code = bitc::TYPE_CODE_X86_MMX; break;
406 case Type::IntegerTyID:
408 Code = bitc::TYPE_CODE_INTEGER;
409 TypeVals.push_back(cast<IntegerType>(T)->getBitWidth());
411 case Type::PointerTyID: {
412 PointerType *PTy = cast<PointerType>(T);
413 // POINTER: [pointee type, address space]
414 Code = bitc::TYPE_CODE_POINTER;
415 TypeVals.push_back(VE.getTypeID(PTy->getElementType()));
416 unsigned AddressSpace = PTy->getAddressSpace();
417 TypeVals.push_back(AddressSpace);
418 if (AddressSpace == 0) AbbrevToUse = PtrAbbrev;
421 case Type::FunctionTyID: {
422 FunctionType *FT = cast<FunctionType>(T);
423 // FUNCTION: [isvararg, retty, paramty x N]
424 Code = bitc::TYPE_CODE_FUNCTION;
425 TypeVals.push_back(FT->isVarArg());
426 TypeVals.push_back(VE.getTypeID(FT->getReturnType()));
427 for (unsigned i = 0, e = FT->getNumParams(); i != e; ++i)
428 TypeVals.push_back(VE.getTypeID(FT->getParamType(i)));
429 AbbrevToUse = FunctionAbbrev;
432 case Type::StructTyID: {
433 StructType *ST = cast<StructType>(T);
434 // STRUCT: [ispacked, eltty x N]
435 TypeVals.push_back(ST->isPacked());
436 // Output all of the element types.
437 for (StructType::element_iterator I = ST->element_begin(),
438 E = ST->element_end(); I != E; ++I)
439 TypeVals.push_back(VE.getTypeID(*I));
441 if (ST->isLiteral()) {
442 Code = bitc::TYPE_CODE_STRUCT_ANON;
443 AbbrevToUse = StructAnonAbbrev;
445 if (ST->isOpaque()) {
446 Code = bitc::TYPE_CODE_OPAQUE;
448 Code = bitc::TYPE_CODE_STRUCT_NAMED;
449 AbbrevToUse = StructNamedAbbrev;
452 // Emit the name if it is present.
453 if (!ST->getName().empty())
454 WriteStringRecord(bitc::TYPE_CODE_STRUCT_NAME, ST->getName(),
455 StructNameAbbrev, Stream);
459 case Type::ArrayTyID: {
460 ArrayType *AT = cast<ArrayType>(T);
461 // ARRAY: [numelts, eltty]
462 Code = bitc::TYPE_CODE_ARRAY;
463 TypeVals.push_back(AT->getNumElements());
464 TypeVals.push_back(VE.getTypeID(AT->getElementType()));
465 AbbrevToUse = ArrayAbbrev;
468 case Type::VectorTyID: {
469 VectorType *VT = cast<VectorType>(T);
470 // VECTOR [numelts, eltty]
471 Code = bitc::TYPE_CODE_VECTOR;
472 TypeVals.push_back(VT->getNumElements());
473 TypeVals.push_back(VE.getTypeID(VT->getElementType()));
478 // Emit the finished record.
479 Stream.EmitRecord(Code, TypeVals, AbbrevToUse);
486 static unsigned getEncodedLinkage(const GlobalValue &GV) {
487 switch (GV.getLinkage()) {
488 case GlobalValue::ExternalLinkage:
490 case GlobalValue::WeakAnyLinkage:
492 case GlobalValue::AppendingLinkage:
494 case GlobalValue::InternalLinkage:
496 case GlobalValue::LinkOnceAnyLinkage:
498 case GlobalValue::ExternalWeakLinkage:
500 case GlobalValue::CommonLinkage:
502 case GlobalValue::PrivateLinkage:
504 case GlobalValue::WeakODRLinkage:
506 case GlobalValue::LinkOnceODRLinkage:
508 case GlobalValue::AvailableExternallyLinkage:
511 llvm_unreachable("Invalid linkage");
514 static unsigned getEncodedVisibility(const GlobalValue &GV) {
515 switch (GV.getVisibility()) {
516 case GlobalValue::DefaultVisibility: return 0;
517 case GlobalValue::HiddenVisibility: return 1;
518 case GlobalValue::ProtectedVisibility: return 2;
520 llvm_unreachable("Invalid visibility");
523 static unsigned getEncodedDLLStorageClass(const GlobalValue &GV) {
524 switch (GV.getDLLStorageClass()) {
525 case GlobalValue::DefaultStorageClass: return 0;
526 case GlobalValue::DLLImportStorageClass: return 1;
527 case GlobalValue::DLLExportStorageClass: return 2;
529 llvm_unreachable("Invalid DLL storage class");
532 static unsigned getEncodedThreadLocalMode(const GlobalValue &GV) {
533 switch (GV.getThreadLocalMode()) {
534 case GlobalVariable::NotThreadLocal: return 0;
535 case GlobalVariable::GeneralDynamicTLSModel: return 1;
536 case GlobalVariable::LocalDynamicTLSModel: return 2;
537 case GlobalVariable::InitialExecTLSModel: return 3;
538 case GlobalVariable::LocalExecTLSModel: return 4;
540 llvm_unreachable("Invalid TLS model");
543 static unsigned getEncodedComdatSelectionKind(const Comdat &C) {
544 switch (C.getSelectionKind()) {
546 return bitc::COMDAT_SELECTION_KIND_ANY;
547 case Comdat::ExactMatch:
548 return bitc::COMDAT_SELECTION_KIND_EXACT_MATCH;
549 case Comdat::Largest:
550 return bitc::COMDAT_SELECTION_KIND_LARGEST;
551 case Comdat::NoDuplicates:
552 return bitc::COMDAT_SELECTION_KIND_NO_DUPLICATES;
553 case Comdat::SameSize:
554 return bitc::COMDAT_SELECTION_KIND_SAME_SIZE;
556 llvm_unreachable("Invalid selection kind");
559 static void writeComdats(const ValueEnumerator &VE, BitstreamWriter &Stream) {
560 SmallVector<uint16_t, 64> Vals;
561 for (const Comdat *C : VE.getComdats()) {
562 // COMDAT: [selection_kind, name]
563 Vals.push_back(getEncodedComdatSelectionKind(*C));
564 size_t Size = C->getName().size();
565 assert(isUInt<16>(Size));
566 Vals.push_back(Size);
567 for (char Chr : C->getName())
568 Vals.push_back((unsigned char)Chr);
569 Stream.EmitRecord(bitc::MODULE_CODE_COMDAT, Vals, /*AbbrevToUse=*/0);
574 // Emit top-level description of module, including target triple, inline asm,
575 // descriptors for global variables, and function prototype info.
576 static void WriteModuleInfo(const Module *M, const ValueEnumerator &VE,
577 BitstreamWriter &Stream) {
578 // Emit various pieces of data attached to a module.
579 if (!M->getTargetTriple().empty())
580 WriteStringRecord(bitc::MODULE_CODE_TRIPLE, M->getTargetTriple(),
582 const std::string &DL = M->getDataLayoutStr();
584 WriteStringRecord(bitc::MODULE_CODE_DATALAYOUT, DL, 0 /*TODO*/, Stream);
585 if (!M->getModuleInlineAsm().empty())
586 WriteStringRecord(bitc::MODULE_CODE_ASM, M->getModuleInlineAsm(),
589 // Emit information about sections and GC, computing how many there are. Also
590 // compute the maximum alignment value.
591 std::map<std::string, unsigned> SectionMap;
592 std::map<std::string, unsigned> GCMap;
593 unsigned MaxAlignment = 0;
594 unsigned MaxGlobalType = 0;
595 for (const GlobalValue &GV : M->globals()) {
596 MaxAlignment = std::max(MaxAlignment, GV.getAlignment());
597 MaxGlobalType = std::max(MaxGlobalType, VE.getTypeID(GV.getValueType()));
598 if (GV.hasSection()) {
599 // Give section names unique ID's.
600 unsigned &Entry = SectionMap[GV.getSection()];
602 WriteStringRecord(bitc::MODULE_CODE_SECTIONNAME, GV.getSection(),
604 Entry = SectionMap.size();
608 for (const Function &F : *M) {
609 MaxAlignment = std::max(MaxAlignment, F.getAlignment());
610 if (F.hasSection()) {
611 // Give section names unique ID's.
612 unsigned &Entry = SectionMap[F.getSection()];
614 WriteStringRecord(bitc::MODULE_CODE_SECTIONNAME, F.getSection(),
616 Entry = SectionMap.size();
620 // Same for GC names.
621 unsigned &Entry = GCMap[F.getGC()];
623 WriteStringRecord(bitc::MODULE_CODE_GCNAME, F.getGC(),
625 Entry = GCMap.size();
630 // Emit abbrev for globals, now that we know # sections and max alignment.
631 unsigned SimpleGVarAbbrev = 0;
632 if (!M->global_empty()) {
633 // Add an abbrev for common globals with no visibility or thread localness.
634 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
635 Abbv->Add(BitCodeAbbrevOp(bitc::MODULE_CODE_GLOBALVAR));
636 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed,
637 Log2_32_Ceil(MaxGlobalType+1)));
638 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // AddrSpace << 2
639 //| explicitType << 1
641 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Initializer.
642 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 5)); // Linkage.
643 if (MaxAlignment == 0) // Alignment.
644 Abbv->Add(BitCodeAbbrevOp(0));
646 unsigned MaxEncAlignment = Log2_32(MaxAlignment)+1;
647 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed,
648 Log2_32_Ceil(MaxEncAlignment+1)));
650 if (SectionMap.empty()) // Section.
651 Abbv->Add(BitCodeAbbrevOp(0));
653 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed,
654 Log2_32_Ceil(SectionMap.size()+1)));
655 // Don't bother emitting vis + thread local.
656 SimpleGVarAbbrev = Stream.EmitAbbrev(Abbv);
659 // Emit the global variable information.
660 SmallVector<unsigned, 64> Vals;
661 for (const GlobalVariable &GV : M->globals()) {
662 unsigned AbbrevToUse = 0;
664 // GLOBALVAR: [type, isconst, initid,
665 // linkage, alignment, section, visibility, threadlocal,
666 // unnamed_addr, externally_initialized, dllstorageclass,
668 Vals.push_back(VE.getTypeID(GV.getValueType()));
669 Vals.push_back(GV.getType()->getAddressSpace() << 2 | 2 | GV.isConstant());
670 Vals.push_back(GV.isDeclaration() ? 0 :
671 (VE.getValueID(GV.getInitializer()) + 1));
672 Vals.push_back(getEncodedLinkage(GV));
673 Vals.push_back(Log2_32(GV.getAlignment())+1);
674 Vals.push_back(GV.hasSection() ? SectionMap[GV.getSection()] : 0);
675 if (GV.isThreadLocal() ||
676 GV.getVisibility() != GlobalValue::DefaultVisibility ||
677 GV.hasUnnamedAddr() || GV.isExternallyInitialized() ||
678 GV.getDLLStorageClass() != GlobalValue::DefaultStorageClass ||
680 Vals.push_back(getEncodedVisibility(GV));
681 Vals.push_back(getEncodedThreadLocalMode(GV));
682 Vals.push_back(GV.hasUnnamedAddr());
683 Vals.push_back(GV.isExternallyInitialized());
684 Vals.push_back(getEncodedDLLStorageClass(GV));
685 Vals.push_back(GV.hasComdat() ? VE.getComdatID(GV.getComdat()) : 0);
687 AbbrevToUse = SimpleGVarAbbrev;
690 Stream.EmitRecord(bitc::MODULE_CODE_GLOBALVAR, Vals, AbbrevToUse);
694 // Emit the function proto information.
695 for (const Function &F : *M) {
696 // FUNCTION: [type, callingconv, isproto, linkage, paramattrs, alignment,
697 // section, visibility, gc, unnamed_addr, prologuedata,
698 // dllstorageclass, comdat, prefixdata, personalityfn]
699 Vals.push_back(VE.getTypeID(F.getFunctionType()));
700 Vals.push_back(F.getCallingConv());
701 Vals.push_back(F.isDeclaration());
702 Vals.push_back(getEncodedLinkage(F));
703 Vals.push_back(VE.getAttributeID(F.getAttributes()));
704 Vals.push_back(Log2_32(F.getAlignment())+1);
705 Vals.push_back(F.hasSection() ? SectionMap[F.getSection()] : 0);
706 Vals.push_back(getEncodedVisibility(F));
707 Vals.push_back(F.hasGC() ? GCMap[F.getGC()] : 0);
708 Vals.push_back(F.hasUnnamedAddr());
709 Vals.push_back(F.hasPrologueData() ? (VE.getValueID(F.getPrologueData()) + 1)
711 Vals.push_back(getEncodedDLLStorageClass(F));
712 Vals.push_back(F.hasComdat() ? VE.getComdatID(F.getComdat()) : 0);
713 Vals.push_back(F.hasPrefixData() ? (VE.getValueID(F.getPrefixData()) + 1)
716 F.hasPersonalityFn() ? (VE.getValueID(F.getPersonalityFn()) + 1) : 0);
718 unsigned AbbrevToUse = 0;
719 Stream.EmitRecord(bitc::MODULE_CODE_FUNCTION, Vals, AbbrevToUse);
723 // Emit the alias information.
724 for (const GlobalAlias &A : M->aliases()) {
725 // ALIAS: [alias type, aliasee val#, linkage, visibility]
726 Vals.push_back(VE.getTypeID(A.getType()));
727 Vals.push_back(VE.getValueID(A.getAliasee()));
728 Vals.push_back(getEncodedLinkage(A));
729 Vals.push_back(getEncodedVisibility(A));
730 Vals.push_back(getEncodedDLLStorageClass(A));
731 Vals.push_back(getEncodedThreadLocalMode(A));
732 Vals.push_back(A.hasUnnamedAddr());
733 unsigned AbbrevToUse = 0;
734 Stream.EmitRecord(bitc::MODULE_CODE_ALIAS, Vals, AbbrevToUse);
739 static uint64_t GetOptimizationFlags(const Value *V) {
742 if (const auto *OBO = dyn_cast<OverflowingBinaryOperator>(V)) {
743 if (OBO->hasNoSignedWrap())
744 Flags |= 1 << bitc::OBO_NO_SIGNED_WRAP;
745 if (OBO->hasNoUnsignedWrap())
746 Flags |= 1 << bitc::OBO_NO_UNSIGNED_WRAP;
747 } else if (const auto *PEO = dyn_cast<PossiblyExactOperator>(V)) {
749 Flags |= 1 << bitc::PEO_EXACT;
750 } else if (const auto *FPMO = dyn_cast<FPMathOperator>(V)) {
751 if (FPMO->hasUnsafeAlgebra())
752 Flags |= FastMathFlags::UnsafeAlgebra;
753 if (FPMO->hasNoNaNs())
754 Flags |= FastMathFlags::NoNaNs;
755 if (FPMO->hasNoInfs())
756 Flags |= FastMathFlags::NoInfs;
757 if (FPMO->hasNoSignedZeros())
758 Flags |= FastMathFlags::NoSignedZeros;
759 if (FPMO->hasAllowReciprocal())
760 Flags |= FastMathFlags::AllowReciprocal;
766 static void WriteValueAsMetadata(const ValueAsMetadata *MD,
767 const ValueEnumerator &VE,
768 BitstreamWriter &Stream,
769 SmallVectorImpl<uint64_t> &Record) {
770 // Mimic an MDNode with a value as one operand.
771 Value *V = MD->getValue();
772 Record.push_back(VE.getTypeID(V->getType()));
773 Record.push_back(VE.getValueID(V));
774 Stream.EmitRecord(bitc::METADATA_VALUE, Record, 0);
778 static void WriteMDTuple(const MDTuple *N, const ValueEnumerator &VE,
779 BitstreamWriter &Stream,
780 SmallVectorImpl<uint64_t> &Record, unsigned Abbrev) {
781 for (unsigned i = 0, e = N->getNumOperands(); i != e; ++i) {
782 Metadata *MD = N->getOperand(i);
783 assert(!(MD && isa<LocalAsMetadata>(MD)) &&
784 "Unexpected function-local metadata");
785 Record.push_back(VE.getMetadataOrNullID(MD));
787 Stream.EmitRecord(N->isDistinct() ? bitc::METADATA_DISTINCT_NODE
788 : bitc::METADATA_NODE,
793 static void WriteDILocation(const DILocation *N, const ValueEnumerator &VE,
794 BitstreamWriter &Stream,
795 SmallVectorImpl<uint64_t> &Record,
797 Record.push_back(N->isDistinct());
798 Record.push_back(N->getLine());
799 Record.push_back(N->getColumn());
800 Record.push_back(VE.getMetadataID(N->getScope()));
801 Record.push_back(VE.getMetadataOrNullID(N->getInlinedAt()));
803 Stream.EmitRecord(bitc::METADATA_LOCATION, Record, Abbrev);
807 static void WriteGenericDINode(const GenericDINode *N,
808 const ValueEnumerator &VE,
809 BitstreamWriter &Stream,
810 SmallVectorImpl<uint64_t> &Record,
812 Record.push_back(N->isDistinct());
813 Record.push_back(N->getTag());
814 Record.push_back(0); // Per-tag version field; unused for now.
816 for (auto &I : N->operands())
817 Record.push_back(VE.getMetadataOrNullID(I));
819 Stream.EmitRecord(bitc::METADATA_GENERIC_DEBUG, Record, Abbrev);
823 static uint64_t rotateSign(int64_t I) {
825 return I < 0 ? ~(U << 1) : U << 1;
828 static void WriteDISubrange(const DISubrange *N, const ValueEnumerator &,
829 BitstreamWriter &Stream,
830 SmallVectorImpl<uint64_t> &Record,
832 Record.push_back(N->isDistinct());
833 Record.push_back(N->getCount());
834 Record.push_back(rotateSign(N->getLowerBound()));
836 Stream.EmitRecord(bitc::METADATA_SUBRANGE, Record, Abbrev);
840 static void WriteDIEnumerator(const DIEnumerator *N, const ValueEnumerator &VE,
841 BitstreamWriter &Stream,
842 SmallVectorImpl<uint64_t> &Record,
844 Record.push_back(N->isDistinct());
845 Record.push_back(rotateSign(N->getValue()));
846 Record.push_back(VE.getMetadataOrNullID(N->getRawName()));
848 Stream.EmitRecord(bitc::METADATA_ENUMERATOR, Record, Abbrev);
852 static void WriteDIBasicType(const DIBasicType *N, const ValueEnumerator &VE,
853 BitstreamWriter &Stream,
854 SmallVectorImpl<uint64_t> &Record,
856 Record.push_back(N->isDistinct());
857 Record.push_back(N->getTag());
858 Record.push_back(VE.getMetadataOrNullID(N->getRawName()));
859 Record.push_back(N->getSizeInBits());
860 Record.push_back(N->getAlignInBits());
861 Record.push_back(N->getEncoding());
863 Stream.EmitRecord(bitc::METADATA_BASIC_TYPE, Record, Abbrev);
867 static void WriteDIDerivedType(const DIDerivedType *N,
868 const ValueEnumerator &VE,
869 BitstreamWriter &Stream,
870 SmallVectorImpl<uint64_t> &Record,
872 Record.push_back(N->isDistinct());
873 Record.push_back(N->getTag());
874 Record.push_back(VE.getMetadataOrNullID(N->getRawName()));
875 Record.push_back(VE.getMetadataOrNullID(N->getFile()));
876 Record.push_back(N->getLine());
877 Record.push_back(VE.getMetadataOrNullID(N->getScope()));
878 Record.push_back(VE.getMetadataOrNullID(N->getBaseType()));
879 Record.push_back(N->getSizeInBits());
880 Record.push_back(N->getAlignInBits());
881 Record.push_back(N->getOffsetInBits());
882 Record.push_back(N->getFlags());
883 Record.push_back(VE.getMetadataOrNullID(N->getExtraData()));
885 Stream.EmitRecord(bitc::METADATA_DERIVED_TYPE, Record, Abbrev);
889 static void WriteDICompositeType(const DICompositeType *N,
890 const ValueEnumerator &VE,
891 BitstreamWriter &Stream,
892 SmallVectorImpl<uint64_t> &Record,
894 Record.push_back(N->isDistinct());
895 Record.push_back(N->getTag());
896 Record.push_back(VE.getMetadataOrNullID(N->getRawName()));
897 Record.push_back(VE.getMetadataOrNullID(N->getFile()));
898 Record.push_back(N->getLine());
899 Record.push_back(VE.getMetadataOrNullID(N->getScope()));
900 Record.push_back(VE.getMetadataOrNullID(N->getBaseType()));
901 Record.push_back(N->getSizeInBits());
902 Record.push_back(N->getAlignInBits());
903 Record.push_back(N->getOffsetInBits());
904 Record.push_back(N->getFlags());
905 Record.push_back(VE.getMetadataOrNullID(N->getElements().get()));
906 Record.push_back(N->getRuntimeLang());
907 Record.push_back(VE.getMetadataOrNullID(N->getVTableHolder()));
908 Record.push_back(VE.getMetadataOrNullID(N->getTemplateParams().get()));
909 Record.push_back(VE.getMetadataOrNullID(N->getRawIdentifier()));
911 Stream.EmitRecord(bitc::METADATA_COMPOSITE_TYPE, Record, Abbrev);
915 static void WriteDISubroutineType(const DISubroutineType *N,
916 const ValueEnumerator &VE,
917 BitstreamWriter &Stream,
918 SmallVectorImpl<uint64_t> &Record,
920 Record.push_back(N->isDistinct());
921 Record.push_back(N->getFlags());
922 Record.push_back(VE.getMetadataOrNullID(N->getTypeArray().get()));
924 Stream.EmitRecord(bitc::METADATA_SUBROUTINE_TYPE, Record, Abbrev);
928 static void WriteDIFile(const DIFile *N, const ValueEnumerator &VE,
929 BitstreamWriter &Stream,
930 SmallVectorImpl<uint64_t> &Record, unsigned Abbrev) {
931 Record.push_back(N->isDistinct());
932 Record.push_back(VE.getMetadataOrNullID(N->getRawFilename()));
933 Record.push_back(VE.getMetadataOrNullID(N->getRawDirectory()));
935 Stream.EmitRecord(bitc::METADATA_FILE, Record, Abbrev);
939 static void WriteDICompileUnit(const DICompileUnit *N,
940 const ValueEnumerator &VE,
941 BitstreamWriter &Stream,
942 SmallVectorImpl<uint64_t> &Record,
944 Record.push_back(N->isDistinct());
945 Record.push_back(N->getSourceLanguage());
946 Record.push_back(VE.getMetadataOrNullID(N->getFile()));
947 Record.push_back(VE.getMetadataOrNullID(N->getRawProducer()));
948 Record.push_back(N->isOptimized());
949 Record.push_back(VE.getMetadataOrNullID(N->getRawFlags()));
950 Record.push_back(N->getRuntimeVersion());
951 Record.push_back(VE.getMetadataOrNullID(N->getRawSplitDebugFilename()));
952 Record.push_back(N->getEmissionKind());
953 Record.push_back(VE.getMetadataOrNullID(N->getEnumTypes().get()));
954 Record.push_back(VE.getMetadataOrNullID(N->getRetainedTypes().get()));
955 Record.push_back(VE.getMetadataOrNullID(N->getSubprograms().get()));
956 Record.push_back(VE.getMetadataOrNullID(N->getGlobalVariables().get()));
957 Record.push_back(VE.getMetadataOrNullID(N->getImportedEntities().get()));
958 Record.push_back(N->getDWOId());
960 Stream.EmitRecord(bitc::METADATA_COMPILE_UNIT, Record, Abbrev);
964 static void WriteDISubprogram(const DISubprogram *N, const ValueEnumerator &VE,
965 BitstreamWriter &Stream,
966 SmallVectorImpl<uint64_t> &Record,
968 Record.push_back(N->isDistinct());
969 Record.push_back(VE.getMetadataOrNullID(N->getScope()));
970 Record.push_back(VE.getMetadataOrNullID(N->getRawName()));
971 Record.push_back(VE.getMetadataOrNullID(N->getRawLinkageName()));
972 Record.push_back(VE.getMetadataOrNullID(N->getFile()));
973 Record.push_back(N->getLine());
974 Record.push_back(VE.getMetadataOrNullID(N->getType()));
975 Record.push_back(N->isLocalToUnit());
976 Record.push_back(N->isDefinition());
977 Record.push_back(N->getScopeLine());
978 Record.push_back(VE.getMetadataOrNullID(N->getContainingType()));
979 Record.push_back(N->getVirtuality());
980 Record.push_back(N->getVirtualIndex());
981 Record.push_back(N->getFlags());
982 Record.push_back(N->isOptimized());
983 Record.push_back(VE.getMetadataOrNullID(N->getRawFunction()));
984 Record.push_back(VE.getMetadataOrNullID(N->getTemplateParams().get()));
985 Record.push_back(VE.getMetadataOrNullID(N->getDeclaration()));
986 Record.push_back(VE.getMetadataOrNullID(N->getVariables().get()));
988 Stream.EmitRecord(bitc::METADATA_SUBPROGRAM, Record, Abbrev);
992 static void WriteDILexicalBlock(const DILexicalBlock *N,
993 const ValueEnumerator &VE,
994 BitstreamWriter &Stream,
995 SmallVectorImpl<uint64_t> &Record,
997 Record.push_back(N->isDistinct());
998 Record.push_back(VE.getMetadataOrNullID(N->getScope()));
999 Record.push_back(VE.getMetadataOrNullID(N->getFile()));
1000 Record.push_back(N->getLine());
1001 Record.push_back(N->getColumn());
1003 Stream.EmitRecord(bitc::METADATA_LEXICAL_BLOCK, Record, Abbrev);
1007 static void WriteDILexicalBlockFile(const DILexicalBlockFile *N,
1008 const ValueEnumerator &VE,
1009 BitstreamWriter &Stream,
1010 SmallVectorImpl<uint64_t> &Record,
1012 Record.push_back(N->isDistinct());
1013 Record.push_back(VE.getMetadataOrNullID(N->getScope()));
1014 Record.push_back(VE.getMetadataOrNullID(N->getFile()));
1015 Record.push_back(N->getDiscriminator());
1017 Stream.EmitRecord(bitc::METADATA_LEXICAL_BLOCK_FILE, Record, Abbrev);
1021 static void WriteDINamespace(const DINamespace *N, const ValueEnumerator &VE,
1022 BitstreamWriter &Stream,
1023 SmallVectorImpl<uint64_t> &Record,
1025 Record.push_back(N->isDistinct());
1026 Record.push_back(VE.getMetadataOrNullID(N->getScope()));
1027 Record.push_back(VE.getMetadataOrNullID(N->getFile()));
1028 Record.push_back(VE.getMetadataOrNullID(N->getRawName()));
1029 Record.push_back(N->getLine());
1031 Stream.EmitRecord(bitc::METADATA_NAMESPACE, Record, Abbrev);
1035 static void WriteDITemplateTypeParameter(const DITemplateTypeParameter *N,
1036 const ValueEnumerator &VE,
1037 BitstreamWriter &Stream,
1038 SmallVectorImpl<uint64_t> &Record,
1040 Record.push_back(N->isDistinct());
1041 Record.push_back(VE.getMetadataOrNullID(N->getRawName()));
1042 Record.push_back(VE.getMetadataOrNullID(N->getType()));
1044 Stream.EmitRecord(bitc::METADATA_TEMPLATE_TYPE, Record, Abbrev);
1048 static void WriteDITemplateValueParameter(const DITemplateValueParameter *N,
1049 const ValueEnumerator &VE,
1050 BitstreamWriter &Stream,
1051 SmallVectorImpl<uint64_t> &Record,
1053 Record.push_back(N->isDistinct());
1054 Record.push_back(N->getTag());
1055 Record.push_back(VE.getMetadataOrNullID(N->getRawName()));
1056 Record.push_back(VE.getMetadataOrNullID(N->getType()));
1057 Record.push_back(VE.getMetadataOrNullID(N->getValue()));
1059 Stream.EmitRecord(bitc::METADATA_TEMPLATE_VALUE, Record, Abbrev);
1063 static void WriteDIGlobalVariable(const DIGlobalVariable *N,
1064 const ValueEnumerator &VE,
1065 BitstreamWriter &Stream,
1066 SmallVectorImpl<uint64_t> &Record,
1068 Record.push_back(N->isDistinct());
1069 Record.push_back(VE.getMetadataOrNullID(N->getScope()));
1070 Record.push_back(VE.getMetadataOrNullID(N->getRawName()));
1071 Record.push_back(VE.getMetadataOrNullID(N->getRawLinkageName()));
1072 Record.push_back(VE.getMetadataOrNullID(N->getFile()));
1073 Record.push_back(N->getLine());
1074 Record.push_back(VE.getMetadataOrNullID(N->getType()));
1075 Record.push_back(N->isLocalToUnit());
1076 Record.push_back(N->isDefinition());
1077 Record.push_back(VE.getMetadataOrNullID(N->getRawVariable()));
1078 Record.push_back(VE.getMetadataOrNullID(N->getStaticDataMemberDeclaration()));
1080 Stream.EmitRecord(bitc::METADATA_GLOBAL_VAR, Record, Abbrev);
1084 static void WriteDILocalVariable(const DILocalVariable *N,
1085 const ValueEnumerator &VE,
1086 BitstreamWriter &Stream,
1087 SmallVectorImpl<uint64_t> &Record,
1089 Record.push_back(N->isDistinct());
1090 Record.push_back(N->getTag());
1091 Record.push_back(VE.getMetadataOrNullID(N->getScope()));
1092 Record.push_back(VE.getMetadataOrNullID(N->getRawName()));
1093 Record.push_back(VE.getMetadataOrNullID(N->getFile()));
1094 Record.push_back(N->getLine());
1095 Record.push_back(VE.getMetadataOrNullID(N->getType()));
1096 Record.push_back(N->getArg());
1097 Record.push_back(N->getFlags());
1099 Stream.EmitRecord(bitc::METADATA_LOCAL_VAR, Record, Abbrev);
1103 static void WriteDIExpression(const DIExpression *N, const ValueEnumerator &,
1104 BitstreamWriter &Stream,
1105 SmallVectorImpl<uint64_t> &Record,
1107 Record.reserve(N->getElements().size() + 1);
1109 Record.push_back(N->isDistinct());
1110 Record.append(N->elements_begin(), N->elements_end());
1112 Stream.EmitRecord(bitc::METADATA_EXPRESSION, Record, Abbrev);
1116 static void WriteDIObjCProperty(const DIObjCProperty *N,
1117 const ValueEnumerator &VE,
1118 BitstreamWriter &Stream,
1119 SmallVectorImpl<uint64_t> &Record,
1121 Record.push_back(N->isDistinct());
1122 Record.push_back(VE.getMetadataOrNullID(N->getRawName()));
1123 Record.push_back(VE.getMetadataOrNullID(N->getFile()));
1124 Record.push_back(N->getLine());
1125 Record.push_back(VE.getMetadataOrNullID(N->getRawSetterName()));
1126 Record.push_back(VE.getMetadataOrNullID(N->getRawGetterName()));
1127 Record.push_back(N->getAttributes());
1128 Record.push_back(VE.getMetadataOrNullID(N->getType()));
1130 Stream.EmitRecord(bitc::METADATA_OBJC_PROPERTY, Record, Abbrev);
1134 static void WriteDIImportedEntity(const DIImportedEntity *N,
1135 const ValueEnumerator &VE,
1136 BitstreamWriter &Stream,
1137 SmallVectorImpl<uint64_t> &Record,
1139 Record.push_back(N->isDistinct());
1140 Record.push_back(N->getTag());
1141 Record.push_back(VE.getMetadataOrNullID(N->getScope()));
1142 Record.push_back(VE.getMetadataOrNullID(N->getEntity()));
1143 Record.push_back(N->getLine());
1144 Record.push_back(VE.getMetadataOrNullID(N->getRawName()));
1146 Stream.EmitRecord(bitc::METADATA_IMPORTED_ENTITY, Record, Abbrev);
1150 static void WriteModuleMetadata(const Module *M,
1151 const ValueEnumerator &VE,
1152 BitstreamWriter &Stream) {
1153 const auto &MDs = VE.getMDs();
1154 if (MDs.empty() && M->named_metadata_empty())
1157 Stream.EnterSubblock(bitc::METADATA_BLOCK_ID, 3);
1159 unsigned MDSAbbrev = 0;
1160 if (VE.hasMDString()) {
1161 // Abbrev for METADATA_STRING.
1162 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
1163 Abbv->Add(BitCodeAbbrevOp(bitc::METADATA_STRING));
1164 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
1165 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 8));
1166 MDSAbbrev = Stream.EmitAbbrev(Abbv);
1169 // Initialize MDNode abbreviations.
1170 #define HANDLE_MDNODE_LEAF(CLASS) unsigned CLASS##Abbrev = 0;
1171 #include "llvm/IR/Metadata.def"
1173 if (VE.hasDILocation()) {
1174 // Abbrev for METADATA_LOCATION.
1176 // Assume the column is usually under 128, and always output the inlined-at
1177 // location (it's never more expensive than building an array size 1).
1178 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
1179 Abbv->Add(BitCodeAbbrevOp(bitc::METADATA_LOCATION));
1180 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1));
1181 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));
1182 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8));
1183 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));
1184 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));
1185 DILocationAbbrev = Stream.EmitAbbrev(Abbv);
1188 if (VE.hasGenericDINode()) {
1189 // Abbrev for METADATA_GENERIC_DEBUG.
1191 // Assume the column is usually under 128, and always output the inlined-at
1192 // location (it's never more expensive than building an array size 1).
1193 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
1194 Abbv->Add(BitCodeAbbrevOp(bitc::METADATA_GENERIC_DEBUG));
1195 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1));
1196 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));
1197 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1));
1198 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));
1199 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
1200 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));
1201 GenericDINodeAbbrev = Stream.EmitAbbrev(Abbv);
1204 unsigned NameAbbrev = 0;
1205 if (!M->named_metadata_empty()) {
1206 // Abbrev for METADATA_NAME.
1207 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
1208 Abbv->Add(BitCodeAbbrevOp(bitc::METADATA_NAME));
1209 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
1210 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 8));
1211 NameAbbrev = Stream.EmitAbbrev(Abbv);
1214 SmallVector<uint64_t, 64> Record;
1215 for (const Metadata *MD : MDs) {
1216 if (const MDNode *N = dyn_cast<MDNode>(MD)) {
1217 assert(N->isResolved() && "Expected forward references to be resolved");
1219 switch (N->getMetadataID()) {
1221 llvm_unreachable("Invalid MDNode subclass");
1222 #define HANDLE_MDNODE_LEAF(CLASS) \
1223 case Metadata::CLASS##Kind: \
1224 Write##CLASS(cast<CLASS>(N), VE, Stream, Record, CLASS##Abbrev); \
1226 #include "llvm/IR/Metadata.def"
1229 if (const auto *MDC = dyn_cast<ConstantAsMetadata>(MD)) {
1230 WriteValueAsMetadata(MDC, VE, Stream, Record);
1233 const MDString *MDS = cast<MDString>(MD);
1234 // Code: [strchar x N]
1235 Record.append(MDS->bytes_begin(), MDS->bytes_end());
1237 // Emit the finished record.
1238 Stream.EmitRecord(bitc::METADATA_STRING, Record, MDSAbbrev);
1242 // Write named metadata.
1243 for (const NamedMDNode &NMD : M->named_metadata()) {
1245 StringRef Str = NMD.getName();
1246 Record.append(Str.bytes_begin(), Str.bytes_end());
1247 Stream.EmitRecord(bitc::METADATA_NAME, Record, NameAbbrev);
1250 // Write named metadata operands.
1251 for (const MDNode *N : NMD.operands())
1252 Record.push_back(VE.getMetadataID(N));
1253 Stream.EmitRecord(bitc::METADATA_NAMED_NODE, Record, 0);
1260 static void WriteFunctionLocalMetadata(const Function &F,
1261 const ValueEnumerator &VE,
1262 BitstreamWriter &Stream) {
1263 bool StartedMetadataBlock = false;
1264 SmallVector<uint64_t, 64> Record;
1265 const SmallVectorImpl<const LocalAsMetadata *> &MDs =
1266 VE.getFunctionLocalMDs();
1267 for (unsigned i = 0, e = MDs.size(); i != e; ++i) {
1268 assert(MDs[i] && "Expected valid function-local metadata");
1269 if (!StartedMetadataBlock) {
1270 Stream.EnterSubblock(bitc::METADATA_BLOCK_ID, 3);
1271 StartedMetadataBlock = true;
1273 WriteValueAsMetadata(MDs[i], VE, Stream, Record);
1276 if (StartedMetadataBlock)
1280 static void WriteMetadataAttachment(const Function &F,
1281 const ValueEnumerator &VE,
1282 BitstreamWriter &Stream) {
1283 Stream.EnterSubblock(bitc::METADATA_ATTACHMENT_ID, 3);
1285 SmallVector<uint64_t, 64> Record;
1287 // Write metadata attachments
1288 // METADATA_ATTACHMENT - [m x [value, [n x [id, mdnode]]]
1289 SmallVector<std::pair<unsigned, MDNode *>, 4> MDs;
1290 F.getAllMetadata(MDs);
1292 for (const auto &I : MDs) {
1293 Record.push_back(I.first);
1294 Record.push_back(VE.getMetadataID(I.second));
1296 Stream.EmitRecord(bitc::METADATA_ATTACHMENT, Record, 0);
1300 for (Function::const_iterator BB = F.begin(), E = F.end(); BB != E; ++BB)
1301 for (BasicBlock::const_iterator I = BB->begin(), E = BB->end();
1304 I->getAllMetadataOtherThanDebugLoc(MDs);
1306 // If no metadata, ignore instruction.
1307 if (MDs.empty()) continue;
1309 Record.push_back(VE.getInstructionID(I));
1311 for (unsigned i = 0, e = MDs.size(); i != e; ++i) {
1312 Record.push_back(MDs[i].first);
1313 Record.push_back(VE.getMetadataID(MDs[i].second));
1315 Stream.EmitRecord(bitc::METADATA_ATTACHMENT, Record, 0);
1322 static void WriteModuleMetadataStore(const Module *M, BitstreamWriter &Stream) {
1323 SmallVector<uint64_t, 64> Record;
1325 // Write metadata kinds
1326 // METADATA_KIND - [n x [id, name]]
1327 SmallVector<StringRef, 8> Names;
1328 M->getMDKindNames(Names);
1330 if (Names.empty()) return;
1332 Stream.EnterSubblock(bitc::METADATA_BLOCK_ID, 3);
1334 for (unsigned MDKindID = 0, e = Names.size(); MDKindID != e; ++MDKindID) {
1335 Record.push_back(MDKindID);
1336 StringRef KName = Names[MDKindID];
1337 Record.append(KName.begin(), KName.end());
1339 Stream.EmitRecord(bitc::METADATA_KIND, Record, 0);
1346 static void emitSignedInt64(SmallVectorImpl<uint64_t> &Vals, uint64_t V) {
1347 if ((int64_t)V >= 0)
1348 Vals.push_back(V << 1);
1350 Vals.push_back((-V << 1) | 1);
1353 static void WriteConstants(unsigned FirstVal, unsigned LastVal,
1354 const ValueEnumerator &VE,
1355 BitstreamWriter &Stream, bool isGlobal) {
1356 if (FirstVal == LastVal) return;
1358 Stream.EnterSubblock(bitc::CONSTANTS_BLOCK_ID, 4);
1360 unsigned AggregateAbbrev = 0;
1361 unsigned String8Abbrev = 0;
1362 unsigned CString7Abbrev = 0;
1363 unsigned CString6Abbrev = 0;
1364 // If this is a constant pool for the module, emit module-specific abbrevs.
1366 // Abbrev for CST_CODE_AGGREGATE.
1367 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
1368 Abbv->Add(BitCodeAbbrevOp(bitc::CST_CODE_AGGREGATE));
1369 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
1370 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, Log2_32_Ceil(LastVal+1)));
1371 AggregateAbbrev = Stream.EmitAbbrev(Abbv);
1373 // Abbrev for CST_CODE_STRING.
1374 Abbv = new BitCodeAbbrev();
1375 Abbv->Add(BitCodeAbbrevOp(bitc::CST_CODE_STRING));
1376 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
1377 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 8));
1378 String8Abbrev = Stream.EmitAbbrev(Abbv);
1379 // Abbrev for CST_CODE_CSTRING.
1380 Abbv = new BitCodeAbbrev();
1381 Abbv->Add(BitCodeAbbrevOp(bitc::CST_CODE_CSTRING));
1382 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
1383 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 7));
1384 CString7Abbrev = Stream.EmitAbbrev(Abbv);
1385 // Abbrev for CST_CODE_CSTRING.
1386 Abbv = new BitCodeAbbrev();
1387 Abbv->Add(BitCodeAbbrevOp(bitc::CST_CODE_CSTRING));
1388 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
1389 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Char6));
1390 CString6Abbrev = Stream.EmitAbbrev(Abbv);
1393 SmallVector<uint64_t, 64> Record;
1395 const ValueEnumerator::ValueList &Vals = VE.getValues();
1396 Type *LastTy = nullptr;
1397 for (unsigned i = FirstVal; i != LastVal; ++i) {
1398 const Value *V = Vals[i].first;
1399 // If we need to switch types, do so now.
1400 if (V->getType() != LastTy) {
1401 LastTy = V->getType();
1402 Record.push_back(VE.getTypeID(LastTy));
1403 Stream.EmitRecord(bitc::CST_CODE_SETTYPE, Record,
1404 CONSTANTS_SETTYPE_ABBREV);
1408 if (const InlineAsm *IA = dyn_cast<InlineAsm>(V)) {
1409 Record.push_back(unsigned(IA->hasSideEffects()) |
1410 unsigned(IA->isAlignStack()) << 1 |
1411 unsigned(IA->getDialect()&1) << 2);
1413 // Add the asm string.
1414 const std::string &AsmStr = IA->getAsmString();
1415 Record.push_back(AsmStr.size());
1416 Record.append(AsmStr.begin(), AsmStr.end());
1418 // Add the constraint string.
1419 const std::string &ConstraintStr = IA->getConstraintString();
1420 Record.push_back(ConstraintStr.size());
1421 Record.append(ConstraintStr.begin(), ConstraintStr.end());
1422 Stream.EmitRecord(bitc::CST_CODE_INLINEASM, Record);
1426 const Constant *C = cast<Constant>(V);
1427 unsigned Code = -1U;
1428 unsigned AbbrevToUse = 0;
1429 if (C->isNullValue()) {
1430 Code = bitc::CST_CODE_NULL;
1431 } else if (isa<UndefValue>(C)) {
1432 Code = bitc::CST_CODE_UNDEF;
1433 } else if (const ConstantInt *IV = dyn_cast<ConstantInt>(C)) {
1434 if (IV->getBitWidth() <= 64) {
1435 uint64_t V = IV->getSExtValue();
1436 emitSignedInt64(Record, V);
1437 Code = bitc::CST_CODE_INTEGER;
1438 AbbrevToUse = CONSTANTS_INTEGER_ABBREV;
1439 } else { // Wide integers, > 64 bits in size.
1440 // We have an arbitrary precision integer value to write whose
1441 // bit width is > 64. However, in canonical unsigned integer
1442 // format it is likely that the high bits are going to be zero.
1443 // So, we only write the number of active words.
1444 unsigned NWords = IV->getValue().getActiveWords();
1445 const uint64_t *RawWords = IV->getValue().getRawData();
1446 for (unsigned i = 0; i != NWords; ++i) {
1447 emitSignedInt64(Record, RawWords[i]);
1449 Code = bitc::CST_CODE_WIDE_INTEGER;
1451 } else if (const ConstantFP *CFP = dyn_cast<ConstantFP>(C)) {
1452 Code = bitc::CST_CODE_FLOAT;
1453 Type *Ty = CFP->getType();
1454 if (Ty->isHalfTy() || Ty->isFloatTy() || Ty->isDoubleTy()) {
1455 Record.push_back(CFP->getValueAPF().bitcastToAPInt().getZExtValue());
1456 } else if (Ty->isX86_FP80Ty()) {
1457 // api needed to prevent premature destruction
1458 // bits are not in the same order as a normal i80 APInt, compensate.
1459 APInt api = CFP->getValueAPF().bitcastToAPInt();
1460 const uint64_t *p = api.getRawData();
1461 Record.push_back((p[1] << 48) | (p[0] >> 16));
1462 Record.push_back(p[0] & 0xffffLL);
1463 } else if (Ty->isFP128Ty() || Ty->isPPC_FP128Ty()) {
1464 APInt api = CFP->getValueAPF().bitcastToAPInt();
1465 const uint64_t *p = api.getRawData();
1466 Record.push_back(p[0]);
1467 Record.push_back(p[1]);
1469 assert (0 && "Unknown FP type!");
1471 } else if (isa<ConstantDataSequential>(C) &&
1472 cast<ConstantDataSequential>(C)->isString()) {
1473 const ConstantDataSequential *Str = cast<ConstantDataSequential>(C);
1474 // Emit constant strings specially.
1475 unsigned NumElts = Str->getNumElements();
1476 // If this is a null-terminated string, use the denser CSTRING encoding.
1477 if (Str->isCString()) {
1478 Code = bitc::CST_CODE_CSTRING;
1479 --NumElts; // Don't encode the null, which isn't allowed by char6.
1481 Code = bitc::CST_CODE_STRING;
1482 AbbrevToUse = String8Abbrev;
1484 bool isCStr7 = Code == bitc::CST_CODE_CSTRING;
1485 bool isCStrChar6 = Code == bitc::CST_CODE_CSTRING;
1486 for (unsigned i = 0; i != NumElts; ++i) {
1487 unsigned char V = Str->getElementAsInteger(i);
1488 Record.push_back(V);
1489 isCStr7 &= (V & 128) == 0;
1491 isCStrChar6 = BitCodeAbbrevOp::isChar6(V);
1495 AbbrevToUse = CString6Abbrev;
1497 AbbrevToUse = CString7Abbrev;
1498 } else if (const ConstantDataSequential *CDS =
1499 dyn_cast<ConstantDataSequential>(C)) {
1500 Code = bitc::CST_CODE_DATA;
1501 Type *EltTy = CDS->getType()->getElementType();
1502 if (isa<IntegerType>(EltTy)) {
1503 for (unsigned i = 0, e = CDS->getNumElements(); i != e; ++i)
1504 Record.push_back(CDS->getElementAsInteger(i));
1505 } else if (EltTy->isFloatTy()) {
1506 for (unsigned i = 0, e = CDS->getNumElements(); i != e; ++i) {
1507 union { float F; uint32_t I; };
1508 F = CDS->getElementAsFloat(i);
1509 Record.push_back(I);
1512 assert(EltTy->isDoubleTy() && "Unknown ConstantData element type");
1513 for (unsigned i = 0, e = CDS->getNumElements(); i != e; ++i) {
1514 union { double F; uint64_t I; };
1515 F = CDS->getElementAsDouble(i);
1516 Record.push_back(I);
1519 } else if (isa<ConstantArray>(C) || isa<ConstantStruct>(C) ||
1520 isa<ConstantVector>(C)) {
1521 Code = bitc::CST_CODE_AGGREGATE;
1522 for (const Value *Op : C->operands())
1523 Record.push_back(VE.getValueID(Op));
1524 AbbrevToUse = AggregateAbbrev;
1525 } else if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(C)) {
1526 switch (CE->getOpcode()) {
1528 if (Instruction::isCast(CE->getOpcode())) {
1529 Code = bitc::CST_CODE_CE_CAST;
1530 Record.push_back(GetEncodedCastOpcode(CE->getOpcode()));
1531 Record.push_back(VE.getTypeID(C->getOperand(0)->getType()));
1532 Record.push_back(VE.getValueID(C->getOperand(0)));
1533 AbbrevToUse = CONSTANTS_CE_CAST_Abbrev;
1535 assert(CE->getNumOperands() == 2 && "Unknown constant expr!");
1536 Code = bitc::CST_CODE_CE_BINOP;
1537 Record.push_back(GetEncodedBinaryOpcode(CE->getOpcode()));
1538 Record.push_back(VE.getValueID(C->getOperand(0)));
1539 Record.push_back(VE.getValueID(C->getOperand(1)));
1540 uint64_t Flags = GetOptimizationFlags(CE);
1542 Record.push_back(Flags);
1545 case Instruction::GetElementPtr: {
1546 Code = bitc::CST_CODE_CE_GEP;
1547 const auto *GO = cast<GEPOperator>(C);
1548 if (GO->isInBounds())
1549 Code = bitc::CST_CODE_CE_INBOUNDS_GEP;
1550 Record.push_back(VE.getTypeID(GO->getSourceElementType()));
1551 for (unsigned i = 0, e = CE->getNumOperands(); i != e; ++i) {
1552 Record.push_back(VE.getTypeID(C->getOperand(i)->getType()));
1553 Record.push_back(VE.getValueID(C->getOperand(i)));
1557 case Instruction::Select:
1558 Code = bitc::CST_CODE_CE_SELECT;
1559 Record.push_back(VE.getValueID(C->getOperand(0)));
1560 Record.push_back(VE.getValueID(C->getOperand(1)));
1561 Record.push_back(VE.getValueID(C->getOperand(2)));
1563 case Instruction::ExtractElement:
1564 Code = bitc::CST_CODE_CE_EXTRACTELT;
1565 Record.push_back(VE.getTypeID(C->getOperand(0)->getType()));
1566 Record.push_back(VE.getValueID(C->getOperand(0)));
1567 Record.push_back(VE.getTypeID(C->getOperand(1)->getType()));
1568 Record.push_back(VE.getValueID(C->getOperand(1)));
1570 case Instruction::InsertElement:
1571 Code = bitc::CST_CODE_CE_INSERTELT;
1572 Record.push_back(VE.getValueID(C->getOperand(0)));
1573 Record.push_back(VE.getValueID(C->getOperand(1)));
1574 Record.push_back(VE.getTypeID(C->getOperand(2)->getType()));
1575 Record.push_back(VE.getValueID(C->getOperand(2)));
1577 case Instruction::ShuffleVector:
1578 // If the return type and argument types are the same, this is a
1579 // standard shufflevector instruction. If the types are different,
1580 // then the shuffle is widening or truncating the input vectors, and
1581 // the argument type must also be encoded.
1582 if (C->getType() == C->getOperand(0)->getType()) {
1583 Code = bitc::CST_CODE_CE_SHUFFLEVEC;
1585 Code = bitc::CST_CODE_CE_SHUFVEC_EX;
1586 Record.push_back(VE.getTypeID(C->getOperand(0)->getType()));
1588 Record.push_back(VE.getValueID(C->getOperand(0)));
1589 Record.push_back(VE.getValueID(C->getOperand(1)));
1590 Record.push_back(VE.getValueID(C->getOperand(2)));
1592 case Instruction::ICmp:
1593 case Instruction::FCmp:
1594 Code = bitc::CST_CODE_CE_CMP;
1595 Record.push_back(VE.getTypeID(C->getOperand(0)->getType()));
1596 Record.push_back(VE.getValueID(C->getOperand(0)));
1597 Record.push_back(VE.getValueID(C->getOperand(1)));
1598 Record.push_back(CE->getPredicate());
1601 } else if (const BlockAddress *BA = dyn_cast<BlockAddress>(C)) {
1602 Code = bitc::CST_CODE_BLOCKADDRESS;
1603 Record.push_back(VE.getTypeID(BA->getFunction()->getType()));
1604 Record.push_back(VE.getValueID(BA->getFunction()));
1605 Record.push_back(VE.getGlobalBasicBlockID(BA->getBasicBlock()));
1610 llvm_unreachable("Unknown constant!");
1612 Stream.EmitRecord(Code, Record, AbbrevToUse);
1619 static void WriteModuleConstants(const ValueEnumerator &VE,
1620 BitstreamWriter &Stream) {
1621 const ValueEnumerator::ValueList &Vals = VE.getValues();
1623 // Find the first constant to emit, which is the first non-globalvalue value.
1624 // We know globalvalues have been emitted by WriteModuleInfo.
1625 for (unsigned i = 0, e = Vals.size(); i != e; ++i) {
1626 if (!isa<GlobalValue>(Vals[i].first)) {
1627 WriteConstants(i, Vals.size(), VE, Stream, true);
1633 /// PushValueAndType - The file has to encode both the value and type id for
1634 /// many values, because we need to know what type to create for forward
1635 /// references. However, most operands are not forward references, so this type
1636 /// field is not needed.
1638 /// This function adds V's value ID to Vals. If the value ID is higher than the
1639 /// instruction ID, then it is a forward reference, and it also includes the
1640 /// type ID. The value ID that is written is encoded relative to the InstID.
1641 static bool PushValueAndType(const Value *V, unsigned InstID,
1642 SmallVectorImpl<unsigned> &Vals,
1643 ValueEnumerator &VE) {
1644 unsigned ValID = VE.getValueID(V);
1645 // Make encoding relative to the InstID.
1646 Vals.push_back(InstID - ValID);
1647 if (ValID >= InstID) {
1648 Vals.push_back(VE.getTypeID(V->getType()));
1654 /// pushValue - Like PushValueAndType, but where the type of the value is
1655 /// omitted (perhaps it was already encoded in an earlier operand).
1656 static void pushValue(const Value *V, unsigned InstID,
1657 SmallVectorImpl<unsigned> &Vals,
1658 ValueEnumerator &VE) {
1659 unsigned ValID = VE.getValueID(V);
1660 Vals.push_back(InstID - ValID);
1663 static void pushValueSigned(const Value *V, unsigned InstID,
1664 SmallVectorImpl<uint64_t> &Vals,
1665 ValueEnumerator &VE) {
1666 unsigned ValID = VE.getValueID(V);
1667 int64_t diff = ((int32_t)InstID - (int32_t)ValID);
1668 emitSignedInt64(Vals, diff);
1671 /// WriteInstruction - Emit an instruction to the specified stream.
1672 static void WriteInstruction(const Instruction &I, unsigned InstID,
1673 ValueEnumerator &VE, BitstreamWriter &Stream,
1674 SmallVectorImpl<unsigned> &Vals) {
1676 unsigned AbbrevToUse = 0;
1677 VE.setInstructionID(&I);
1678 switch (I.getOpcode()) {
1680 if (Instruction::isCast(I.getOpcode())) {
1681 Code = bitc::FUNC_CODE_INST_CAST;
1682 if (!PushValueAndType(I.getOperand(0), InstID, Vals, VE))
1683 AbbrevToUse = FUNCTION_INST_CAST_ABBREV;
1684 Vals.push_back(VE.getTypeID(I.getType()));
1685 Vals.push_back(GetEncodedCastOpcode(I.getOpcode()));
1687 assert(isa<BinaryOperator>(I) && "Unknown instruction!");
1688 Code = bitc::FUNC_CODE_INST_BINOP;
1689 if (!PushValueAndType(I.getOperand(0), InstID, Vals, VE))
1690 AbbrevToUse = FUNCTION_INST_BINOP_ABBREV;
1691 pushValue(I.getOperand(1), InstID, Vals, VE);
1692 Vals.push_back(GetEncodedBinaryOpcode(I.getOpcode()));
1693 uint64_t Flags = GetOptimizationFlags(&I);
1695 if (AbbrevToUse == FUNCTION_INST_BINOP_ABBREV)
1696 AbbrevToUse = FUNCTION_INST_BINOP_FLAGS_ABBREV;
1697 Vals.push_back(Flags);
1702 case Instruction::GetElementPtr: {
1703 Code = bitc::FUNC_CODE_INST_GEP;
1704 AbbrevToUse = FUNCTION_INST_GEP_ABBREV;
1705 auto &GEPInst = cast<GetElementPtrInst>(I);
1706 Vals.push_back(GEPInst.isInBounds());
1707 Vals.push_back(VE.getTypeID(GEPInst.getSourceElementType()));
1708 for (unsigned i = 0, e = I.getNumOperands(); i != e; ++i)
1709 PushValueAndType(I.getOperand(i), InstID, Vals, VE);
1712 case Instruction::ExtractValue: {
1713 Code = bitc::FUNC_CODE_INST_EXTRACTVAL;
1714 PushValueAndType(I.getOperand(0), InstID, Vals, VE);
1715 const ExtractValueInst *EVI = cast<ExtractValueInst>(&I);
1716 Vals.append(EVI->idx_begin(), EVI->idx_end());
1719 case Instruction::InsertValue: {
1720 Code = bitc::FUNC_CODE_INST_INSERTVAL;
1721 PushValueAndType(I.getOperand(0), InstID, Vals, VE);
1722 PushValueAndType(I.getOperand(1), InstID, Vals, VE);
1723 const InsertValueInst *IVI = cast<InsertValueInst>(&I);
1724 Vals.append(IVI->idx_begin(), IVI->idx_end());
1727 case Instruction::Select:
1728 Code = bitc::FUNC_CODE_INST_VSELECT;
1729 PushValueAndType(I.getOperand(1), InstID, Vals, VE);
1730 pushValue(I.getOperand(2), InstID, Vals, VE);
1731 PushValueAndType(I.getOperand(0), InstID, Vals, VE);
1733 case Instruction::ExtractElement:
1734 Code = bitc::FUNC_CODE_INST_EXTRACTELT;
1735 PushValueAndType(I.getOperand(0), InstID, Vals, VE);
1736 PushValueAndType(I.getOperand(1), InstID, Vals, VE);
1738 case Instruction::InsertElement:
1739 Code = bitc::FUNC_CODE_INST_INSERTELT;
1740 PushValueAndType(I.getOperand(0), InstID, Vals, VE);
1741 pushValue(I.getOperand(1), InstID, Vals, VE);
1742 PushValueAndType(I.getOperand(2), InstID, Vals, VE);
1744 case Instruction::ShuffleVector:
1745 Code = bitc::FUNC_CODE_INST_SHUFFLEVEC;
1746 PushValueAndType(I.getOperand(0), InstID, Vals, VE);
1747 pushValue(I.getOperand(1), InstID, Vals, VE);
1748 pushValue(I.getOperand(2), InstID, Vals, VE);
1750 case Instruction::ICmp:
1751 case Instruction::FCmp:
1752 // compare returning Int1Ty or vector of Int1Ty
1753 Code = bitc::FUNC_CODE_INST_CMP2;
1754 PushValueAndType(I.getOperand(0), InstID, Vals, VE);
1755 pushValue(I.getOperand(1), InstID, Vals, VE);
1756 Vals.push_back(cast<CmpInst>(I).getPredicate());
1759 case Instruction::Ret:
1761 Code = bitc::FUNC_CODE_INST_RET;
1762 unsigned NumOperands = I.getNumOperands();
1763 if (NumOperands == 0)
1764 AbbrevToUse = FUNCTION_INST_RET_VOID_ABBREV;
1765 else if (NumOperands == 1) {
1766 if (!PushValueAndType(I.getOperand(0), InstID, Vals, VE))
1767 AbbrevToUse = FUNCTION_INST_RET_VAL_ABBREV;
1769 for (unsigned i = 0, e = NumOperands; i != e; ++i)
1770 PushValueAndType(I.getOperand(i), InstID, Vals, VE);
1774 case Instruction::Br:
1776 Code = bitc::FUNC_CODE_INST_BR;
1777 const BranchInst &II = cast<BranchInst>(I);
1778 Vals.push_back(VE.getValueID(II.getSuccessor(0)));
1779 if (II.isConditional()) {
1780 Vals.push_back(VE.getValueID(II.getSuccessor(1)));
1781 pushValue(II.getCondition(), InstID, Vals, VE);
1785 case Instruction::Switch:
1787 Code = bitc::FUNC_CODE_INST_SWITCH;
1788 const SwitchInst &SI = cast<SwitchInst>(I);
1789 Vals.push_back(VE.getTypeID(SI.getCondition()->getType()));
1790 pushValue(SI.getCondition(), InstID, Vals, VE);
1791 Vals.push_back(VE.getValueID(SI.getDefaultDest()));
1792 for (SwitchInst::ConstCaseIt i = SI.case_begin(), e = SI.case_end();
1794 Vals.push_back(VE.getValueID(i.getCaseValue()));
1795 Vals.push_back(VE.getValueID(i.getCaseSuccessor()));
1799 case Instruction::IndirectBr:
1800 Code = bitc::FUNC_CODE_INST_INDIRECTBR;
1801 Vals.push_back(VE.getTypeID(I.getOperand(0)->getType()));
1802 // Encode the address operand as relative, but not the basic blocks.
1803 pushValue(I.getOperand(0), InstID, Vals, VE);
1804 for (unsigned i = 1, e = I.getNumOperands(); i != e; ++i)
1805 Vals.push_back(VE.getValueID(I.getOperand(i)));
1808 case Instruction::Invoke: {
1809 const InvokeInst *II = cast<InvokeInst>(&I);
1810 const Value *Callee = II->getCalledValue();
1811 FunctionType *FTy = II->getFunctionType();
1812 Code = bitc::FUNC_CODE_INST_INVOKE;
1814 Vals.push_back(VE.getAttributeID(II->getAttributes()));
1815 Vals.push_back(II->getCallingConv() | 1 << 13);
1816 Vals.push_back(VE.getValueID(II->getNormalDest()));
1817 Vals.push_back(VE.getValueID(II->getUnwindDest()));
1818 Vals.push_back(VE.getTypeID(FTy));
1819 PushValueAndType(Callee, InstID, Vals, VE);
1821 // Emit value #'s for the fixed parameters.
1822 for (unsigned i = 0, e = FTy->getNumParams(); i != e; ++i)
1823 pushValue(I.getOperand(i), InstID, Vals, VE); // fixed param.
1825 // Emit type/value pairs for varargs params.
1826 if (FTy->isVarArg()) {
1827 for (unsigned i = FTy->getNumParams(), e = I.getNumOperands()-3;
1829 PushValueAndType(I.getOperand(i), InstID, Vals, VE); // vararg
1833 case Instruction::Resume:
1834 Code = bitc::FUNC_CODE_INST_RESUME;
1835 PushValueAndType(I.getOperand(0), InstID, Vals, VE);
1837 case Instruction::Unreachable:
1838 Code = bitc::FUNC_CODE_INST_UNREACHABLE;
1839 AbbrevToUse = FUNCTION_INST_UNREACHABLE_ABBREV;
1842 case Instruction::PHI: {
1843 const PHINode &PN = cast<PHINode>(I);
1844 Code = bitc::FUNC_CODE_INST_PHI;
1845 // With the newer instruction encoding, forward references could give
1846 // negative valued IDs. This is most common for PHIs, so we use
1848 SmallVector<uint64_t, 128> Vals64;
1849 Vals64.push_back(VE.getTypeID(PN.getType()));
1850 for (unsigned i = 0, e = PN.getNumIncomingValues(); i != e; ++i) {
1851 pushValueSigned(PN.getIncomingValue(i), InstID, Vals64, VE);
1852 Vals64.push_back(VE.getValueID(PN.getIncomingBlock(i)));
1854 // Emit a Vals64 vector and exit.
1855 Stream.EmitRecord(Code, Vals64, AbbrevToUse);
1860 case Instruction::LandingPad: {
1861 const LandingPadInst &LP = cast<LandingPadInst>(I);
1862 Code = bitc::FUNC_CODE_INST_LANDINGPAD;
1863 Vals.push_back(VE.getTypeID(LP.getType()));
1864 Vals.push_back(LP.isCleanup());
1865 Vals.push_back(LP.getNumClauses());
1866 for (unsigned I = 0, E = LP.getNumClauses(); I != E; ++I) {
1868 Vals.push_back(LandingPadInst::Catch);
1870 Vals.push_back(LandingPadInst::Filter);
1871 PushValueAndType(LP.getClause(I), InstID, Vals, VE);
1876 case Instruction::Alloca: {
1877 Code = bitc::FUNC_CODE_INST_ALLOCA;
1878 const AllocaInst &AI = cast<AllocaInst>(I);
1879 Vals.push_back(VE.getTypeID(AI.getAllocatedType()));
1880 Vals.push_back(VE.getTypeID(I.getOperand(0)->getType()));
1881 Vals.push_back(VE.getValueID(I.getOperand(0))); // size.
1882 unsigned AlignRecord = Log2_32(AI.getAlignment()) + 1;
1883 assert(Log2_32(Value::MaximumAlignment) + 1 < 1 << 5 &&
1884 "not enough bits for maximum alignment");
1885 assert(AlignRecord < 1 << 5 && "alignment greater than 1 << 64");
1886 AlignRecord |= AI.isUsedWithInAlloca() << 5;
1887 AlignRecord |= 1 << 6;
1888 Vals.push_back(AlignRecord);
1892 case Instruction::Load:
1893 if (cast<LoadInst>(I).isAtomic()) {
1894 Code = bitc::FUNC_CODE_INST_LOADATOMIC;
1895 PushValueAndType(I.getOperand(0), InstID, Vals, VE);
1897 Code = bitc::FUNC_CODE_INST_LOAD;
1898 if (!PushValueAndType(I.getOperand(0), InstID, Vals, VE)) // ptr
1899 AbbrevToUse = FUNCTION_INST_LOAD_ABBREV;
1901 Vals.push_back(VE.getTypeID(I.getType()));
1902 Vals.push_back(Log2_32(cast<LoadInst>(I).getAlignment())+1);
1903 Vals.push_back(cast<LoadInst>(I).isVolatile());
1904 if (cast<LoadInst>(I).isAtomic()) {
1905 Vals.push_back(GetEncodedOrdering(cast<LoadInst>(I).getOrdering()));
1906 Vals.push_back(GetEncodedSynchScope(cast<LoadInst>(I).getSynchScope()));
1909 case Instruction::Store:
1910 if (cast<StoreInst>(I).isAtomic())
1911 Code = bitc::FUNC_CODE_INST_STOREATOMIC;
1913 Code = bitc::FUNC_CODE_INST_STORE;
1914 PushValueAndType(I.getOperand(1), InstID, Vals, VE); // ptrty + ptr
1915 PushValueAndType(I.getOperand(0), InstID, Vals, VE); // valty + val
1916 Vals.push_back(Log2_32(cast<StoreInst>(I).getAlignment())+1);
1917 Vals.push_back(cast<StoreInst>(I).isVolatile());
1918 if (cast<StoreInst>(I).isAtomic()) {
1919 Vals.push_back(GetEncodedOrdering(cast<StoreInst>(I).getOrdering()));
1920 Vals.push_back(GetEncodedSynchScope(cast<StoreInst>(I).getSynchScope()));
1923 case Instruction::AtomicCmpXchg:
1924 Code = bitc::FUNC_CODE_INST_CMPXCHG;
1925 PushValueAndType(I.getOperand(0), InstID, Vals, VE); // ptrty + ptr
1926 PushValueAndType(I.getOperand(1), InstID, Vals, VE); // cmp.
1927 pushValue(I.getOperand(2), InstID, Vals, VE); // newval.
1928 Vals.push_back(cast<AtomicCmpXchgInst>(I).isVolatile());
1929 Vals.push_back(GetEncodedOrdering(
1930 cast<AtomicCmpXchgInst>(I).getSuccessOrdering()));
1931 Vals.push_back(GetEncodedSynchScope(
1932 cast<AtomicCmpXchgInst>(I).getSynchScope()));
1933 Vals.push_back(GetEncodedOrdering(
1934 cast<AtomicCmpXchgInst>(I).getFailureOrdering()));
1935 Vals.push_back(cast<AtomicCmpXchgInst>(I).isWeak());
1937 case Instruction::AtomicRMW:
1938 Code = bitc::FUNC_CODE_INST_ATOMICRMW;
1939 PushValueAndType(I.getOperand(0), InstID, Vals, VE); // ptrty + ptr
1940 pushValue(I.getOperand(1), InstID, Vals, VE); // val.
1941 Vals.push_back(GetEncodedRMWOperation(
1942 cast<AtomicRMWInst>(I).getOperation()));
1943 Vals.push_back(cast<AtomicRMWInst>(I).isVolatile());
1944 Vals.push_back(GetEncodedOrdering(cast<AtomicRMWInst>(I).getOrdering()));
1945 Vals.push_back(GetEncodedSynchScope(
1946 cast<AtomicRMWInst>(I).getSynchScope()));
1948 case Instruction::Fence:
1949 Code = bitc::FUNC_CODE_INST_FENCE;
1950 Vals.push_back(GetEncodedOrdering(cast<FenceInst>(I).getOrdering()));
1951 Vals.push_back(GetEncodedSynchScope(cast<FenceInst>(I).getSynchScope()));
1953 case Instruction::Call: {
1954 const CallInst &CI = cast<CallInst>(I);
1955 FunctionType *FTy = CI.getFunctionType();
1957 Code = bitc::FUNC_CODE_INST_CALL;
1959 Vals.push_back(VE.getAttributeID(CI.getAttributes()));
1960 Vals.push_back((CI.getCallingConv() << 1) | unsigned(CI.isTailCall()) |
1961 unsigned(CI.isMustTailCall()) << 14 | 1 << 15);
1962 Vals.push_back(VE.getTypeID(FTy));
1963 PushValueAndType(CI.getCalledValue(), InstID, Vals, VE); // Callee
1965 // Emit value #'s for the fixed parameters.
1966 for (unsigned i = 0, e = FTy->getNumParams(); i != e; ++i) {
1967 // Check for labels (can happen with asm labels).
1968 if (FTy->getParamType(i)->isLabelTy())
1969 Vals.push_back(VE.getValueID(CI.getArgOperand(i)));
1971 pushValue(CI.getArgOperand(i), InstID, Vals, VE); // fixed param.
1974 // Emit type/value pairs for varargs params.
1975 if (FTy->isVarArg()) {
1976 for (unsigned i = FTy->getNumParams(), e = CI.getNumArgOperands();
1978 PushValueAndType(CI.getArgOperand(i), InstID, Vals, VE); // varargs
1982 case Instruction::VAArg:
1983 Code = bitc::FUNC_CODE_INST_VAARG;
1984 Vals.push_back(VE.getTypeID(I.getOperand(0)->getType())); // valistty
1985 pushValue(I.getOperand(0), InstID, Vals, VE); // valist.
1986 Vals.push_back(VE.getTypeID(I.getType())); // restype.
1990 Stream.EmitRecord(Code, Vals, AbbrevToUse);
1994 // Emit names for globals/functions etc.
1995 static void WriteValueSymbolTable(const ValueSymbolTable &VST,
1996 const ValueEnumerator &VE,
1997 BitstreamWriter &Stream) {
1998 if (VST.empty()) return;
1999 Stream.EnterSubblock(bitc::VALUE_SYMTAB_BLOCK_ID, 4);
2001 // FIXME: Set up the abbrev, we know how many values there are!
2002 // FIXME: We know if the type names can use 7-bit ascii.
2003 SmallVector<unsigned, 64> NameVals;
2005 for (ValueSymbolTable::const_iterator SI = VST.begin(), SE = VST.end();
2008 const ValueName &Name = *SI;
2010 // Figure out the encoding to use for the name.
2012 bool isChar6 = true;
2013 for (const char *C = Name.getKeyData(), *E = C+Name.getKeyLength();
2016 isChar6 = BitCodeAbbrevOp::isChar6(*C);
2017 if ((unsigned char)*C & 128) {
2019 break; // don't bother scanning the rest.
2023 unsigned AbbrevToUse = VST_ENTRY_8_ABBREV;
2025 // VST_ENTRY: [valueid, namechar x N]
2026 // VST_BBENTRY: [bbid, namechar x N]
2028 if (isa<BasicBlock>(SI->getValue())) {
2029 Code = bitc::VST_CODE_BBENTRY;
2031 AbbrevToUse = VST_BBENTRY_6_ABBREV;
2033 Code = bitc::VST_CODE_ENTRY;
2035 AbbrevToUse = VST_ENTRY_6_ABBREV;
2037 AbbrevToUse = VST_ENTRY_7_ABBREV;
2040 NameVals.push_back(VE.getValueID(SI->getValue()));
2041 for (const char *P = Name.getKeyData(),
2042 *E = Name.getKeyData()+Name.getKeyLength(); P != E; ++P)
2043 NameVals.push_back((unsigned char)*P);
2045 // Emit the finished record.
2046 Stream.EmitRecord(Code, NameVals, AbbrevToUse);
2052 static void WriteUseList(ValueEnumerator &VE, UseListOrder &&Order,
2053 BitstreamWriter &Stream) {
2054 assert(Order.Shuffle.size() >= 2 && "Shuffle too small");
2056 if (isa<BasicBlock>(Order.V))
2057 Code = bitc::USELIST_CODE_BB;
2059 Code = bitc::USELIST_CODE_DEFAULT;
2061 SmallVector<uint64_t, 64> Record(Order.Shuffle.begin(), Order.Shuffle.end());
2062 Record.push_back(VE.getValueID(Order.V));
2063 Stream.EmitRecord(Code, Record);
2066 static void WriteUseListBlock(const Function *F, ValueEnumerator &VE,
2067 BitstreamWriter &Stream) {
2068 assert(VE.shouldPreserveUseListOrder() &&
2069 "Expected to be preserving use-list order");
2071 auto hasMore = [&]() {
2072 return !VE.UseListOrders.empty() && VE.UseListOrders.back().F == F;
2078 Stream.EnterSubblock(bitc::USELIST_BLOCK_ID, 3);
2080 WriteUseList(VE, std::move(VE.UseListOrders.back()), Stream);
2081 VE.UseListOrders.pop_back();
2086 /// WriteFunction - Emit a function body to the module stream.
2087 static void WriteFunction(const Function &F, ValueEnumerator &VE,
2088 BitstreamWriter &Stream) {
2089 Stream.EnterSubblock(bitc::FUNCTION_BLOCK_ID, 4);
2090 VE.incorporateFunction(F);
2092 SmallVector<unsigned, 64> Vals;
2094 // Emit the number of basic blocks, so the reader can create them ahead of
2096 Vals.push_back(VE.getBasicBlocks().size());
2097 Stream.EmitRecord(bitc::FUNC_CODE_DECLAREBLOCKS, Vals);
2100 // If there are function-local constants, emit them now.
2101 unsigned CstStart, CstEnd;
2102 VE.getFunctionConstantRange(CstStart, CstEnd);
2103 WriteConstants(CstStart, CstEnd, VE, Stream, false);
2105 // If there is function-local metadata, emit it now.
2106 WriteFunctionLocalMetadata(F, VE, Stream);
2108 // Keep a running idea of what the instruction ID is.
2109 unsigned InstID = CstEnd;
2111 bool NeedsMetadataAttachment = F.hasMetadata();
2113 DILocation *LastDL = nullptr;
2115 // Finally, emit all the instructions, in order.
2116 for (Function::const_iterator BB = F.begin(), E = F.end(); BB != E; ++BB)
2117 for (BasicBlock::const_iterator I = BB->begin(), E = BB->end();
2119 WriteInstruction(*I, InstID, VE, Stream, Vals);
2121 if (!I->getType()->isVoidTy())
2124 // If the instruction has metadata, write a metadata attachment later.
2125 NeedsMetadataAttachment |= I->hasMetadataOtherThanDebugLoc();
2127 // If the instruction has a debug location, emit it.
2128 DILocation *DL = I->getDebugLoc();
2133 // Just repeat the same debug loc as last time.
2134 Stream.EmitRecord(bitc::FUNC_CODE_DEBUG_LOC_AGAIN, Vals);
2138 Vals.push_back(DL->getLine());
2139 Vals.push_back(DL->getColumn());
2140 Vals.push_back(VE.getMetadataOrNullID(DL->getScope()));
2141 Vals.push_back(VE.getMetadataOrNullID(DL->getInlinedAt()));
2142 Stream.EmitRecord(bitc::FUNC_CODE_DEBUG_LOC, Vals);
2148 // Emit names for all the instructions etc.
2149 WriteValueSymbolTable(F.getValueSymbolTable(), VE, Stream);
2151 if (NeedsMetadataAttachment)
2152 WriteMetadataAttachment(F, VE, Stream);
2153 if (VE.shouldPreserveUseListOrder())
2154 WriteUseListBlock(&F, VE, Stream);
2159 // Emit blockinfo, which defines the standard abbreviations etc.
2160 static void WriteBlockInfo(const ValueEnumerator &VE, BitstreamWriter &Stream) {
2161 // We only want to emit block info records for blocks that have multiple
2162 // instances: CONSTANTS_BLOCK, FUNCTION_BLOCK and VALUE_SYMTAB_BLOCK.
2163 // Other blocks can define their abbrevs inline.
2164 Stream.EnterBlockInfoBlock(2);
2166 { // 8-bit fixed-width VST_ENTRY/VST_BBENTRY strings.
2167 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
2168 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 3));
2169 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8));
2170 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
2171 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 8));
2172 if (Stream.EmitBlockInfoAbbrev(bitc::VALUE_SYMTAB_BLOCK_ID,
2173 Abbv) != VST_ENTRY_8_ABBREV)
2174 llvm_unreachable("Unexpected abbrev ordering!");
2177 { // 7-bit fixed width VST_ENTRY strings.
2178 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
2179 Abbv->Add(BitCodeAbbrevOp(bitc::VST_CODE_ENTRY));
2180 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8));
2181 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
2182 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 7));
2183 if (Stream.EmitBlockInfoAbbrev(bitc::VALUE_SYMTAB_BLOCK_ID,
2184 Abbv) != VST_ENTRY_7_ABBREV)
2185 llvm_unreachable("Unexpected abbrev ordering!");
2187 { // 6-bit char6 VST_ENTRY strings.
2188 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
2189 Abbv->Add(BitCodeAbbrevOp(bitc::VST_CODE_ENTRY));
2190 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8));
2191 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
2192 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Char6));
2193 if (Stream.EmitBlockInfoAbbrev(bitc::VALUE_SYMTAB_BLOCK_ID,
2194 Abbv) != VST_ENTRY_6_ABBREV)
2195 llvm_unreachable("Unexpected abbrev ordering!");
2197 { // 6-bit char6 VST_BBENTRY strings.
2198 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
2199 Abbv->Add(BitCodeAbbrevOp(bitc::VST_CODE_BBENTRY));
2200 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8));
2201 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
2202 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Char6));
2203 if (Stream.EmitBlockInfoAbbrev(bitc::VALUE_SYMTAB_BLOCK_ID,
2204 Abbv) != VST_BBENTRY_6_ABBREV)
2205 llvm_unreachable("Unexpected abbrev ordering!");
2210 { // SETTYPE abbrev for CONSTANTS_BLOCK.
2211 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
2212 Abbv->Add(BitCodeAbbrevOp(bitc::CST_CODE_SETTYPE));
2213 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed,
2214 VE.computeBitsRequiredForTypeIndicies()));
2215 if (Stream.EmitBlockInfoAbbrev(bitc::CONSTANTS_BLOCK_ID,
2216 Abbv) != CONSTANTS_SETTYPE_ABBREV)
2217 llvm_unreachable("Unexpected abbrev ordering!");
2220 { // INTEGER abbrev for CONSTANTS_BLOCK.
2221 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
2222 Abbv->Add(BitCodeAbbrevOp(bitc::CST_CODE_INTEGER));
2223 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8));
2224 if (Stream.EmitBlockInfoAbbrev(bitc::CONSTANTS_BLOCK_ID,
2225 Abbv) != CONSTANTS_INTEGER_ABBREV)
2226 llvm_unreachable("Unexpected abbrev ordering!");
2229 { // CE_CAST abbrev for CONSTANTS_BLOCK.
2230 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
2231 Abbv->Add(BitCodeAbbrevOp(bitc::CST_CODE_CE_CAST));
2232 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 4)); // cast opc
2233 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, // typeid
2234 VE.computeBitsRequiredForTypeIndicies()));
2235 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8)); // value id
2237 if (Stream.EmitBlockInfoAbbrev(bitc::CONSTANTS_BLOCK_ID,
2238 Abbv) != CONSTANTS_CE_CAST_Abbrev)
2239 llvm_unreachable("Unexpected abbrev ordering!");
2241 { // NULL abbrev for CONSTANTS_BLOCK.
2242 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
2243 Abbv->Add(BitCodeAbbrevOp(bitc::CST_CODE_NULL));
2244 if (Stream.EmitBlockInfoAbbrev(bitc::CONSTANTS_BLOCK_ID,
2245 Abbv) != CONSTANTS_NULL_Abbrev)
2246 llvm_unreachable("Unexpected abbrev ordering!");
2249 // FIXME: This should only use space for first class types!
2251 { // INST_LOAD abbrev for FUNCTION_BLOCK.
2252 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
2253 Abbv->Add(BitCodeAbbrevOp(bitc::FUNC_CODE_INST_LOAD));
2254 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Ptr
2255 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, // dest ty
2256 VE.computeBitsRequiredForTypeIndicies()));
2257 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 4)); // Align
2258 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // volatile
2259 if (Stream.EmitBlockInfoAbbrev(bitc::FUNCTION_BLOCK_ID,
2260 Abbv) != FUNCTION_INST_LOAD_ABBREV)
2261 llvm_unreachable("Unexpected abbrev ordering!");
2263 { // INST_BINOP abbrev for FUNCTION_BLOCK.
2264 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
2265 Abbv->Add(BitCodeAbbrevOp(bitc::FUNC_CODE_INST_BINOP));
2266 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // LHS
2267 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // RHS
2268 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 4)); // opc
2269 if (Stream.EmitBlockInfoAbbrev(bitc::FUNCTION_BLOCK_ID,
2270 Abbv) != FUNCTION_INST_BINOP_ABBREV)
2271 llvm_unreachable("Unexpected abbrev ordering!");
2273 { // INST_BINOP_FLAGS abbrev for FUNCTION_BLOCK.
2274 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
2275 Abbv->Add(BitCodeAbbrevOp(bitc::FUNC_CODE_INST_BINOP));
2276 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // LHS
2277 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // RHS
2278 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 4)); // opc
2279 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 7)); // flags
2280 if (Stream.EmitBlockInfoAbbrev(bitc::FUNCTION_BLOCK_ID,
2281 Abbv) != FUNCTION_INST_BINOP_FLAGS_ABBREV)
2282 llvm_unreachable("Unexpected abbrev ordering!");
2284 { // INST_CAST abbrev for FUNCTION_BLOCK.
2285 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
2286 Abbv->Add(BitCodeAbbrevOp(bitc::FUNC_CODE_INST_CAST));
2287 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // OpVal
2288 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, // dest ty
2289 VE.computeBitsRequiredForTypeIndicies()));
2290 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 4)); // opc
2291 if (Stream.EmitBlockInfoAbbrev(bitc::FUNCTION_BLOCK_ID,
2292 Abbv) != FUNCTION_INST_CAST_ABBREV)
2293 llvm_unreachable("Unexpected abbrev ordering!");
2296 { // INST_RET abbrev for FUNCTION_BLOCK.
2297 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
2298 Abbv->Add(BitCodeAbbrevOp(bitc::FUNC_CODE_INST_RET));
2299 if (Stream.EmitBlockInfoAbbrev(bitc::FUNCTION_BLOCK_ID,
2300 Abbv) != FUNCTION_INST_RET_VOID_ABBREV)
2301 llvm_unreachable("Unexpected abbrev ordering!");
2303 { // INST_RET abbrev for FUNCTION_BLOCK.
2304 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
2305 Abbv->Add(BitCodeAbbrevOp(bitc::FUNC_CODE_INST_RET));
2306 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // ValID
2307 if (Stream.EmitBlockInfoAbbrev(bitc::FUNCTION_BLOCK_ID,
2308 Abbv) != FUNCTION_INST_RET_VAL_ABBREV)
2309 llvm_unreachable("Unexpected abbrev ordering!");
2311 { // INST_UNREACHABLE abbrev for FUNCTION_BLOCK.
2312 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
2313 Abbv->Add(BitCodeAbbrevOp(bitc::FUNC_CODE_INST_UNREACHABLE));
2314 if (Stream.EmitBlockInfoAbbrev(bitc::FUNCTION_BLOCK_ID,
2315 Abbv) != FUNCTION_INST_UNREACHABLE_ABBREV)
2316 llvm_unreachable("Unexpected abbrev ordering!");
2319 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
2320 Abbv->Add(BitCodeAbbrevOp(bitc::FUNC_CODE_INST_GEP));
2321 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1));
2322 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, // dest ty
2323 Log2_32_Ceil(VE.getTypes().size() + 1)));
2324 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
2325 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));
2326 if (Stream.EmitBlockInfoAbbrev(bitc::FUNCTION_BLOCK_ID, Abbv) !=
2327 FUNCTION_INST_GEP_ABBREV)
2328 llvm_unreachable("Unexpected abbrev ordering!");
2334 /// WriteModule - Emit the specified module to the bitstream.
2335 static void WriteModule(const Module *M, BitstreamWriter &Stream,
2336 bool ShouldPreserveUseListOrder) {
2337 Stream.EnterSubblock(bitc::MODULE_BLOCK_ID, 3);
2339 SmallVector<unsigned, 1> Vals;
2340 unsigned CurVersion = 1;
2341 Vals.push_back(CurVersion);
2342 Stream.EmitRecord(bitc::MODULE_CODE_VERSION, Vals);
2344 // Analyze the module, enumerating globals, functions, etc.
2345 ValueEnumerator VE(*M, ShouldPreserveUseListOrder);
2347 // Emit blockinfo, which defines the standard abbreviations etc.
2348 WriteBlockInfo(VE, Stream);
2350 // Emit information about attribute groups.
2351 WriteAttributeGroupTable(VE, Stream);
2353 // Emit information about parameter attributes.
2354 WriteAttributeTable(VE, Stream);
2356 // Emit information describing all of the types in the module.
2357 WriteTypeTable(VE, Stream);
2359 writeComdats(VE, Stream);
2361 // Emit top-level description of module, including target triple, inline asm,
2362 // descriptors for global variables, and function prototype info.
2363 WriteModuleInfo(M, VE, Stream);
2366 WriteModuleConstants(VE, Stream);
2369 WriteModuleMetadata(M, VE, Stream);
2372 WriteModuleMetadataStore(M, Stream);
2374 // Emit names for globals/functions etc.
2375 WriteValueSymbolTable(M->getValueSymbolTable(), VE, Stream);
2377 // Emit module-level use-lists.
2378 if (VE.shouldPreserveUseListOrder())
2379 WriteUseListBlock(nullptr, VE, Stream);
2381 // Emit function bodies.
2382 for (Module::const_iterator F = M->begin(), E = M->end(); F != E; ++F)
2383 if (!F->isDeclaration())
2384 WriteFunction(*F, VE, Stream);
2389 /// EmitDarwinBCHeader - If generating a bc file on darwin, we have to emit a
2390 /// header and trailer to make it compatible with the system archiver. To do
2391 /// this we emit the following header, and then emit a trailer that pads the
2392 /// file out to be a multiple of 16 bytes.
2394 /// struct bc_header {
2395 /// uint32_t Magic; // 0x0B17C0DE
2396 /// uint32_t Version; // Version, currently always 0.
2397 /// uint32_t BitcodeOffset; // Offset to traditional bitcode file.
2398 /// uint32_t BitcodeSize; // Size of traditional bitcode file.
2399 /// uint32_t CPUType; // CPU specifier.
2400 /// ... potentially more later ...
2403 DarwinBCSizeFieldOffset = 3*4, // Offset to bitcode_size.
2404 DarwinBCHeaderSize = 5*4
2407 static void WriteInt32ToBuffer(uint32_t Value, SmallVectorImpl<char> &Buffer,
2408 uint32_t &Position) {
2409 support::endian::write32le(&Buffer[Position], Value);
2413 static void EmitDarwinBCHeaderAndTrailer(SmallVectorImpl<char> &Buffer,
2415 unsigned CPUType = ~0U;
2417 // Match x86_64-*, i[3-9]86-*, powerpc-*, powerpc64-*, arm-*, thumb-*,
2418 // armv[0-9]-*, thumbv[0-9]-*, armv5te-*, or armv6t2-*. The CPUType is a magic
2419 // number from /usr/include/mach/machine.h. It is ok to reproduce the
2420 // specific constants here because they are implicitly part of the Darwin ABI.
2422 DARWIN_CPU_ARCH_ABI64 = 0x01000000,
2423 DARWIN_CPU_TYPE_X86 = 7,
2424 DARWIN_CPU_TYPE_ARM = 12,
2425 DARWIN_CPU_TYPE_POWERPC = 18
2428 Triple::ArchType Arch = TT.getArch();
2429 if (Arch == Triple::x86_64)
2430 CPUType = DARWIN_CPU_TYPE_X86 | DARWIN_CPU_ARCH_ABI64;
2431 else if (Arch == Triple::x86)
2432 CPUType = DARWIN_CPU_TYPE_X86;
2433 else if (Arch == Triple::ppc)
2434 CPUType = DARWIN_CPU_TYPE_POWERPC;
2435 else if (Arch == Triple::ppc64)
2436 CPUType = DARWIN_CPU_TYPE_POWERPC | DARWIN_CPU_ARCH_ABI64;
2437 else if (Arch == Triple::arm || Arch == Triple::thumb)
2438 CPUType = DARWIN_CPU_TYPE_ARM;
2440 // Traditional Bitcode starts after header.
2441 assert(Buffer.size() >= DarwinBCHeaderSize &&
2442 "Expected header size to be reserved");
2443 unsigned BCOffset = DarwinBCHeaderSize;
2444 unsigned BCSize = Buffer.size()-DarwinBCHeaderSize;
2446 // Write the magic and version.
2447 unsigned Position = 0;
2448 WriteInt32ToBuffer(0x0B17C0DE , Buffer, Position);
2449 WriteInt32ToBuffer(0 , Buffer, Position); // Version.
2450 WriteInt32ToBuffer(BCOffset , Buffer, Position);
2451 WriteInt32ToBuffer(BCSize , Buffer, Position);
2452 WriteInt32ToBuffer(CPUType , Buffer, Position);
2454 // If the file is not a multiple of 16 bytes, insert dummy padding.
2455 while (Buffer.size() & 15)
2456 Buffer.push_back(0);
2459 /// WriteBitcodeToFile - Write the specified module to the specified output
2461 void llvm::WriteBitcodeToFile(const Module *M, raw_ostream &Out,
2462 bool ShouldPreserveUseListOrder) {
2463 SmallVector<char, 0> Buffer;
2464 Buffer.reserve(256*1024);
2466 // If this is darwin or another generic macho target, reserve space for the
2468 Triple TT(M->getTargetTriple());
2469 if (TT.isOSDarwin())
2470 Buffer.insert(Buffer.begin(), DarwinBCHeaderSize, 0);
2472 // Emit the module into the buffer.
2474 BitstreamWriter Stream(Buffer);
2476 // Emit the file header.
2477 Stream.Emit((unsigned)'B', 8);
2478 Stream.Emit((unsigned)'C', 8);
2479 Stream.Emit(0x0, 4);
2480 Stream.Emit(0xC, 4);
2481 Stream.Emit(0xE, 4);
2482 Stream.Emit(0xD, 4);
2485 WriteModule(M, Stream, ShouldPreserveUseListOrder);
2488 if (TT.isOSDarwin())
2489 EmitDarwinBCHeaderAndTrailer(Buffer, TT);
2491 // Write the generated bitstream to "Out".
2492 Out.write((char*)&Buffer.front(), Buffer.size());