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/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/UseListOrder.h"
26 #include "llvm/IR/ValueSymbolTable.h"
27 #include "llvm/Support/CommandLine.h"
28 #include "llvm/Support/ErrorHandling.h"
29 #include "llvm/Support/MathExtras.h"
30 #include "llvm/Support/Program.h"
31 #include "llvm/Support/raw_ostream.h"
36 /// These are manifest constants used by the bitcode writer. They do not need to
37 /// be kept in sync with the reader, but need to be consistent within this file.
39 // VALUE_SYMTAB_BLOCK abbrev id's.
40 VST_ENTRY_8_ABBREV = bitc::FIRST_APPLICATION_ABBREV,
45 // CONSTANTS_BLOCK abbrev id's.
46 CONSTANTS_SETTYPE_ABBREV = bitc::FIRST_APPLICATION_ABBREV,
47 CONSTANTS_INTEGER_ABBREV,
48 CONSTANTS_CE_CAST_Abbrev,
49 CONSTANTS_NULL_Abbrev,
51 // FUNCTION_BLOCK abbrev id's.
52 FUNCTION_INST_LOAD_ABBREV = bitc::FIRST_APPLICATION_ABBREV,
53 FUNCTION_INST_BINOP_ABBREV,
54 FUNCTION_INST_BINOP_FLAGS_ABBREV,
55 FUNCTION_INST_CAST_ABBREV,
56 FUNCTION_INST_RET_VOID_ABBREV,
57 FUNCTION_INST_RET_VAL_ABBREV,
58 FUNCTION_INST_UNREACHABLE_ABBREV
61 static unsigned GetEncodedCastOpcode(unsigned Opcode) {
63 default: llvm_unreachable("Unknown cast instruction!");
64 case Instruction::Trunc : return bitc::CAST_TRUNC;
65 case Instruction::ZExt : return bitc::CAST_ZEXT;
66 case Instruction::SExt : return bitc::CAST_SEXT;
67 case Instruction::FPToUI : return bitc::CAST_FPTOUI;
68 case Instruction::FPToSI : return bitc::CAST_FPTOSI;
69 case Instruction::UIToFP : return bitc::CAST_UITOFP;
70 case Instruction::SIToFP : return bitc::CAST_SITOFP;
71 case Instruction::FPTrunc : return bitc::CAST_FPTRUNC;
72 case Instruction::FPExt : return bitc::CAST_FPEXT;
73 case Instruction::PtrToInt: return bitc::CAST_PTRTOINT;
74 case Instruction::IntToPtr: return bitc::CAST_INTTOPTR;
75 case Instruction::BitCast : return bitc::CAST_BITCAST;
76 case Instruction::AddrSpaceCast: return bitc::CAST_ADDRSPACECAST;
80 static unsigned GetEncodedBinaryOpcode(unsigned Opcode) {
82 default: llvm_unreachable("Unknown binary instruction!");
83 case Instruction::Add:
84 case Instruction::FAdd: return bitc::BINOP_ADD;
85 case Instruction::Sub:
86 case Instruction::FSub: return bitc::BINOP_SUB;
87 case Instruction::Mul:
88 case Instruction::FMul: return bitc::BINOP_MUL;
89 case Instruction::UDiv: return bitc::BINOP_UDIV;
90 case Instruction::FDiv:
91 case Instruction::SDiv: return bitc::BINOP_SDIV;
92 case Instruction::URem: return bitc::BINOP_UREM;
93 case Instruction::FRem:
94 case Instruction::SRem: return bitc::BINOP_SREM;
95 case Instruction::Shl: return bitc::BINOP_SHL;
96 case Instruction::LShr: return bitc::BINOP_LSHR;
97 case Instruction::AShr: return bitc::BINOP_ASHR;
98 case Instruction::And: return bitc::BINOP_AND;
99 case Instruction::Or: return bitc::BINOP_OR;
100 case Instruction::Xor: return bitc::BINOP_XOR;
104 static unsigned GetEncodedRMWOperation(AtomicRMWInst::BinOp Op) {
106 default: llvm_unreachable("Unknown RMW operation!");
107 case AtomicRMWInst::Xchg: return bitc::RMW_XCHG;
108 case AtomicRMWInst::Add: return bitc::RMW_ADD;
109 case AtomicRMWInst::Sub: return bitc::RMW_SUB;
110 case AtomicRMWInst::And: return bitc::RMW_AND;
111 case AtomicRMWInst::Nand: return bitc::RMW_NAND;
112 case AtomicRMWInst::Or: return bitc::RMW_OR;
113 case AtomicRMWInst::Xor: return bitc::RMW_XOR;
114 case AtomicRMWInst::Max: return bitc::RMW_MAX;
115 case AtomicRMWInst::Min: return bitc::RMW_MIN;
116 case AtomicRMWInst::UMax: return bitc::RMW_UMAX;
117 case AtomicRMWInst::UMin: return bitc::RMW_UMIN;
121 static unsigned GetEncodedOrdering(AtomicOrdering Ordering) {
123 case NotAtomic: return bitc::ORDERING_NOTATOMIC;
124 case Unordered: return bitc::ORDERING_UNORDERED;
125 case Monotonic: return bitc::ORDERING_MONOTONIC;
126 case Acquire: return bitc::ORDERING_ACQUIRE;
127 case Release: return bitc::ORDERING_RELEASE;
128 case AcquireRelease: return bitc::ORDERING_ACQREL;
129 case SequentiallyConsistent: return bitc::ORDERING_SEQCST;
131 llvm_unreachable("Invalid ordering");
134 static unsigned GetEncodedSynchScope(SynchronizationScope SynchScope) {
135 switch (SynchScope) {
136 case SingleThread: return bitc::SYNCHSCOPE_SINGLETHREAD;
137 case CrossThread: return bitc::SYNCHSCOPE_CROSSTHREAD;
139 llvm_unreachable("Invalid synch scope");
142 static void WriteStringRecord(unsigned Code, StringRef Str,
143 unsigned AbbrevToUse, BitstreamWriter &Stream) {
144 SmallVector<unsigned, 64> Vals;
146 // Code: [strchar x N]
147 for (unsigned i = 0, e = Str.size(); i != e; ++i) {
148 if (AbbrevToUse && !BitCodeAbbrevOp::isChar6(Str[i]))
150 Vals.push_back(Str[i]);
153 // Emit the finished record.
154 Stream.EmitRecord(Code, Vals, AbbrevToUse);
157 static uint64_t getAttrKindEncoding(Attribute::AttrKind Kind) {
159 case Attribute::Alignment:
160 return bitc::ATTR_KIND_ALIGNMENT;
161 case Attribute::AlwaysInline:
162 return bitc::ATTR_KIND_ALWAYS_INLINE;
163 case Attribute::Builtin:
164 return bitc::ATTR_KIND_BUILTIN;
165 case Attribute::ByVal:
166 return bitc::ATTR_KIND_BY_VAL;
167 case Attribute::InAlloca:
168 return bitc::ATTR_KIND_IN_ALLOCA;
169 case Attribute::Cold:
170 return bitc::ATTR_KIND_COLD;
171 case Attribute::InlineHint:
172 return bitc::ATTR_KIND_INLINE_HINT;
173 case Attribute::InReg:
174 return bitc::ATTR_KIND_IN_REG;
175 case Attribute::JumpTable:
176 return bitc::ATTR_KIND_JUMP_TABLE;
177 case Attribute::MinSize:
178 return bitc::ATTR_KIND_MIN_SIZE;
179 case Attribute::Naked:
180 return bitc::ATTR_KIND_NAKED;
181 case Attribute::Nest:
182 return bitc::ATTR_KIND_NEST;
183 case Attribute::NoAlias:
184 return bitc::ATTR_KIND_NO_ALIAS;
185 case Attribute::NoBuiltin:
186 return bitc::ATTR_KIND_NO_BUILTIN;
187 case Attribute::NoCapture:
188 return bitc::ATTR_KIND_NO_CAPTURE;
189 case Attribute::NoDuplicate:
190 return bitc::ATTR_KIND_NO_DUPLICATE;
191 case Attribute::NoImplicitFloat:
192 return bitc::ATTR_KIND_NO_IMPLICIT_FLOAT;
193 case Attribute::NoInline:
194 return bitc::ATTR_KIND_NO_INLINE;
195 case Attribute::NonLazyBind:
196 return bitc::ATTR_KIND_NON_LAZY_BIND;
197 case Attribute::NonNull:
198 return bitc::ATTR_KIND_NON_NULL;
199 case Attribute::Dereferenceable:
200 return bitc::ATTR_KIND_DEREFERENCEABLE;
201 case Attribute::NoRedZone:
202 return bitc::ATTR_KIND_NO_RED_ZONE;
203 case Attribute::NoReturn:
204 return bitc::ATTR_KIND_NO_RETURN;
205 case Attribute::NoUnwind:
206 return bitc::ATTR_KIND_NO_UNWIND;
207 case Attribute::OptimizeForSize:
208 return bitc::ATTR_KIND_OPTIMIZE_FOR_SIZE;
209 case Attribute::OptimizeNone:
210 return bitc::ATTR_KIND_OPTIMIZE_NONE;
211 case Attribute::ReadNone:
212 return bitc::ATTR_KIND_READ_NONE;
213 case Attribute::ReadOnly:
214 return bitc::ATTR_KIND_READ_ONLY;
215 case Attribute::Returned:
216 return bitc::ATTR_KIND_RETURNED;
217 case Attribute::ReturnsTwice:
218 return bitc::ATTR_KIND_RETURNS_TWICE;
219 case Attribute::SExt:
220 return bitc::ATTR_KIND_S_EXT;
221 case Attribute::StackAlignment:
222 return bitc::ATTR_KIND_STACK_ALIGNMENT;
223 case Attribute::StackProtect:
224 return bitc::ATTR_KIND_STACK_PROTECT;
225 case Attribute::StackProtectReq:
226 return bitc::ATTR_KIND_STACK_PROTECT_REQ;
227 case Attribute::StackProtectStrong:
228 return bitc::ATTR_KIND_STACK_PROTECT_STRONG;
229 case Attribute::StructRet:
230 return bitc::ATTR_KIND_STRUCT_RET;
231 case Attribute::SanitizeAddress:
232 return bitc::ATTR_KIND_SANITIZE_ADDRESS;
233 case Attribute::SanitizeThread:
234 return bitc::ATTR_KIND_SANITIZE_THREAD;
235 case Attribute::SanitizeMemory:
236 return bitc::ATTR_KIND_SANITIZE_MEMORY;
237 case Attribute::UWTable:
238 return bitc::ATTR_KIND_UW_TABLE;
239 case Attribute::ZExt:
240 return bitc::ATTR_KIND_Z_EXT;
241 case Attribute::EndAttrKinds:
242 llvm_unreachable("Can not encode end-attribute kinds marker.");
243 case Attribute::None:
244 llvm_unreachable("Can not encode none-attribute.");
247 llvm_unreachable("Trying to encode unknown attribute");
250 static void WriteAttributeGroupTable(const ValueEnumerator &VE,
251 BitstreamWriter &Stream) {
252 const std::vector<AttributeSet> &AttrGrps = VE.getAttributeGroups();
253 if (AttrGrps.empty()) return;
255 Stream.EnterSubblock(bitc::PARAMATTR_GROUP_BLOCK_ID, 3);
257 SmallVector<uint64_t, 64> Record;
258 for (unsigned i = 0, e = AttrGrps.size(); i != e; ++i) {
259 AttributeSet AS = AttrGrps[i];
260 for (unsigned i = 0, e = AS.getNumSlots(); i != e; ++i) {
261 AttributeSet A = AS.getSlotAttributes(i);
263 Record.push_back(VE.getAttributeGroupID(A));
264 Record.push_back(AS.getSlotIndex(i));
266 for (AttributeSet::iterator I = AS.begin(0), E = AS.end(0);
269 if (Attr.isEnumAttribute()) {
271 Record.push_back(getAttrKindEncoding(Attr.getKindAsEnum()));
272 } else if (Attr.isIntAttribute()) {
274 Record.push_back(getAttrKindEncoding(Attr.getKindAsEnum()));
275 Record.push_back(Attr.getValueAsInt());
277 StringRef Kind = Attr.getKindAsString();
278 StringRef Val = Attr.getValueAsString();
280 Record.push_back(Val.empty() ? 3 : 4);
281 Record.append(Kind.begin(), Kind.end());
284 Record.append(Val.begin(), Val.end());
290 Stream.EmitRecord(bitc::PARAMATTR_GRP_CODE_ENTRY, Record);
298 static void WriteAttributeTable(const ValueEnumerator &VE,
299 BitstreamWriter &Stream) {
300 const std::vector<AttributeSet> &Attrs = VE.getAttributes();
301 if (Attrs.empty()) return;
303 Stream.EnterSubblock(bitc::PARAMATTR_BLOCK_ID, 3);
305 SmallVector<uint64_t, 64> Record;
306 for (unsigned i = 0, e = Attrs.size(); i != e; ++i) {
307 const AttributeSet &A = Attrs[i];
308 for (unsigned i = 0, e = A.getNumSlots(); i != e; ++i)
309 Record.push_back(VE.getAttributeGroupID(A.getSlotAttributes(i)));
311 Stream.EmitRecord(bitc::PARAMATTR_CODE_ENTRY, Record);
318 /// WriteTypeTable - Write out the type table for a module.
319 static void WriteTypeTable(const ValueEnumerator &VE, BitstreamWriter &Stream) {
320 const ValueEnumerator::TypeList &TypeList = VE.getTypes();
322 Stream.EnterSubblock(bitc::TYPE_BLOCK_ID_NEW, 4 /*count from # abbrevs */);
323 SmallVector<uint64_t, 64> TypeVals;
325 uint64_t NumBits = Log2_32_Ceil(VE.getTypes().size()+1);
327 // Abbrev for TYPE_CODE_POINTER.
328 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
329 Abbv->Add(BitCodeAbbrevOp(bitc::TYPE_CODE_POINTER));
330 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, NumBits));
331 Abbv->Add(BitCodeAbbrevOp(0)); // Addrspace = 0
332 unsigned PtrAbbrev = Stream.EmitAbbrev(Abbv);
334 // Abbrev for TYPE_CODE_FUNCTION.
335 Abbv = new BitCodeAbbrev();
336 Abbv->Add(BitCodeAbbrevOp(bitc::TYPE_CODE_FUNCTION));
337 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // isvararg
338 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
339 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, NumBits));
341 unsigned FunctionAbbrev = Stream.EmitAbbrev(Abbv);
343 // Abbrev for TYPE_CODE_STRUCT_ANON.
344 Abbv = new BitCodeAbbrev();
345 Abbv->Add(BitCodeAbbrevOp(bitc::TYPE_CODE_STRUCT_ANON));
346 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // ispacked
347 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
348 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, NumBits));
350 unsigned StructAnonAbbrev = Stream.EmitAbbrev(Abbv);
352 // Abbrev for TYPE_CODE_STRUCT_NAME.
353 Abbv = new BitCodeAbbrev();
354 Abbv->Add(BitCodeAbbrevOp(bitc::TYPE_CODE_STRUCT_NAME));
355 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
356 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Char6));
357 unsigned StructNameAbbrev = Stream.EmitAbbrev(Abbv);
359 // Abbrev for TYPE_CODE_STRUCT_NAMED.
360 Abbv = new BitCodeAbbrev();
361 Abbv->Add(BitCodeAbbrevOp(bitc::TYPE_CODE_STRUCT_NAMED));
362 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // ispacked
363 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
364 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, NumBits));
366 unsigned StructNamedAbbrev = Stream.EmitAbbrev(Abbv);
368 // Abbrev for TYPE_CODE_ARRAY.
369 Abbv = new BitCodeAbbrev();
370 Abbv->Add(BitCodeAbbrevOp(bitc::TYPE_CODE_ARRAY));
371 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8)); // size
372 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, NumBits));
374 unsigned ArrayAbbrev = Stream.EmitAbbrev(Abbv);
376 // Emit an entry count so the reader can reserve space.
377 TypeVals.push_back(TypeList.size());
378 Stream.EmitRecord(bitc::TYPE_CODE_NUMENTRY, TypeVals);
381 // Loop over all of the types, emitting each in turn.
382 for (unsigned i = 0, e = TypeList.size(); i != e; ++i) {
383 Type *T = TypeList[i];
387 switch (T->getTypeID()) {
388 case Type::VoidTyID: Code = bitc::TYPE_CODE_VOID; break;
389 case Type::HalfTyID: Code = bitc::TYPE_CODE_HALF; break;
390 case Type::FloatTyID: Code = bitc::TYPE_CODE_FLOAT; break;
391 case Type::DoubleTyID: Code = bitc::TYPE_CODE_DOUBLE; break;
392 case Type::X86_FP80TyID: Code = bitc::TYPE_CODE_X86_FP80; break;
393 case Type::FP128TyID: Code = bitc::TYPE_CODE_FP128; break;
394 case Type::PPC_FP128TyID: Code = bitc::TYPE_CODE_PPC_FP128; break;
395 case Type::LabelTyID: Code = bitc::TYPE_CODE_LABEL; break;
396 case Type::MetadataTyID: Code = bitc::TYPE_CODE_METADATA; break;
397 case Type::X86_MMXTyID: Code = bitc::TYPE_CODE_X86_MMX; break;
398 case Type::IntegerTyID:
400 Code = bitc::TYPE_CODE_INTEGER;
401 TypeVals.push_back(cast<IntegerType>(T)->getBitWidth());
403 case Type::PointerTyID: {
404 PointerType *PTy = cast<PointerType>(T);
405 // POINTER: [pointee type, address space]
406 Code = bitc::TYPE_CODE_POINTER;
407 TypeVals.push_back(VE.getTypeID(PTy->getElementType()));
408 unsigned AddressSpace = PTy->getAddressSpace();
409 TypeVals.push_back(AddressSpace);
410 if (AddressSpace == 0) AbbrevToUse = PtrAbbrev;
413 case Type::FunctionTyID: {
414 FunctionType *FT = cast<FunctionType>(T);
415 // FUNCTION: [isvararg, retty, paramty x N]
416 Code = bitc::TYPE_CODE_FUNCTION;
417 TypeVals.push_back(FT->isVarArg());
418 TypeVals.push_back(VE.getTypeID(FT->getReturnType()));
419 for (unsigned i = 0, e = FT->getNumParams(); i != e; ++i)
420 TypeVals.push_back(VE.getTypeID(FT->getParamType(i)));
421 AbbrevToUse = FunctionAbbrev;
424 case Type::StructTyID: {
425 StructType *ST = cast<StructType>(T);
426 // STRUCT: [ispacked, eltty x N]
427 TypeVals.push_back(ST->isPacked());
428 // Output all of the element types.
429 for (StructType::element_iterator I = ST->element_begin(),
430 E = ST->element_end(); I != E; ++I)
431 TypeVals.push_back(VE.getTypeID(*I));
433 if (ST->isLiteral()) {
434 Code = bitc::TYPE_CODE_STRUCT_ANON;
435 AbbrevToUse = StructAnonAbbrev;
437 if (ST->isOpaque()) {
438 Code = bitc::TYPE_CODE_OPAQUE;
440 Code = bitc::TYPE_CODE_STRUCT_NAMED;
441 AbbrevToUse = StructNamedAbbrev;
444 // Emit the name if it is present.
445 if (!ST->getName().empty())
446 WriteStringRecord(bitc::TYPE_CODE_STRUCT_NAME, ST->getName(),
447 StructNameAbbrev, Stream);
451 case Type::ArrayTyID: {
452 ArrayType *AT = cast<ArrayType>(T);
453 // ARRAY: [numelts, eltty]
454 Code = bitc::TYPE_CODE_ARRAY;
455 TypeVals.push_back(AT->getNumElements());
456 TypeVals.push_back(VE.getTypeID(AT->getElementType()));
457 AbbrevToUse = ArrayAbbrev;
460 case Type::VectorTyID: {
461 VectorType *VT = cast<VectorType>(T);
462 // VECTOR [numelts, eltty]
463 Code = bitc::TYPE_CODE_VECTOR;
464 TypeVals.push_back(VT->getNumElements());
465 TypeVals.push_back(VE.getTypeID(VT->getElementType()));
470 // Emit the finished record.
471 Stream.EmitRecord(Code, TypeVals, AbbrevToUse);
478 static unsigned getEncodedLinkage(const GlobalValue &GV) {
479 switch (GV.getLinkage()) {
480 case GlobalValue::ExternalLinkage:
482 case GlobalValue::WeakAnyLinkage:
484 case GlobalValue::AppendingLinkage:
486 case GlobalValue::InternalLinkage:
488 case GlobalValue::LinkOnceAnyLinkage:
490 case GlobalValue::ExternalWeakLinkage:
492 case GlobalValue::CommonLinkage:
494 case GlobalValue::PrivateLinkage:
496 case GlobalValue::WeakODRLinkage:
498 case GlobalValue::LinkOnceODRLinkage:
500 case GlobalValue::AvailableExternallyLinkage:
503 llvm_unreachable("Invalid linkage");
506 static unsigned getEncodedVisibility(const GlobalValue &GV) {
507 switch (GV.getVisibility()) {
508 case GlobalValue::DefaultVisibility: return 0;
509 case GlobalValue::HiddenVisibility: return 1;
510 case GlobalValue::ProtectedVisibility: return 2;
512 llvm_unreachable("Invalid visibility");
515 static unsigned getEncodedDLLStorageClass(const GlobalValue &GV) {
516 switch (GV.getDLLStorageClass()) {
517 case GlobalValue::DefaultStorageClass: return 0;
518 case GlobalValue::DLLImportStorageClass: return 1;
519 case GlobalValue::DLLExportStorageClass: return 2;
521 llvm_unreachable("Invalid DLL storage class");
524 static unsigned getEncodedThreadLocalMode(const GlobalValue &GV) {
525 switch (GV.getThreadLocalMode()) {
526 case GlobalVariable::NotThreadLocal: return 0;
527 case GlobalVariable::GeneralDynamicTLSModel: return 1;
528 case GlobalVariable::LocalDynamicTLSModel: return 2;
529 case GlobalVariable::InitialExecTLSModel: return 3;
530 case GlobalVariable::LocalExecTLSModel: return 4;
532 llvm_unreachable("Invalid TLS model");
535 static unsigned getEncodedComdatSelectionKind(const Comdat &C) {
536 switch (C.getSelectionKind()) {
538 return bitc::COMDAT_SELECTION_KIND_ANY;
539 case Comdat::ExactMatch:
540 return bitc::COMDAT_SELECTION_KIND_EXACT_MATCH;
541 case Comdat::Largest:
542 return bitc::COMDAT_SELECTION_KIND_LARGEST;
543 case Comdat::NoDuplicates:
544 return bitc::COMDAT_SELECTION_KIND_NO_DUPLICATES;
545 case Comdat::SameSize:
546 return bitc::COMDAT_SELECTION_KIND_SAME_SIZE;
548 llvm_unreachable("Invalid selection kind");
551 static void writeComdats(const ValueEnumerator &VE, BitstreamWriter &Stream) {
552 SmallVector<uint8_t, 64> Vals;
553 for (const Comdat *C : VE.getComdats()) {
554 // COMDAT: [selection_kind, name]
555 Vals.push_back(getEncodedComdatSelectionKind(*C));
556 Vals.push_back(C->getName().size());
557 for (char Chr : C->getName())
558 Vals.push_back((unsigned char)Chr);
559 Stream.EmitRecord(bitc::MODULE_CODE_COMDAT, Vals, /*AbbrevToUse=*/0);
564 // Emit top-level description of module, including target triple, inline asm,
565 // descriptors for global variables, and function prototype info.
566 static void WriteModuleInfo(const Module *M, const ValueEnumerator &VE,
567 BitstreamWriter &Stream) {
568 // Emit various pieces of data attached to a module.
569 if (!M->getTargetTriple().empty())
570 WriteStringRecord(bitc::MODULE_CODE_TRIPLE, M->getTargetTriple(),
572 const std::string &DL = M->getDataLayoutStr();
574 WriteStringRecord(bitc::MODULE_CODE_DATALAYOUT, DL, 0 /*TODO*/, Stream);
575 if (!M->getModuleInlineAsm().empty())
576 WriteStringRecord(bitc::MODULE_CODE_ASM, M->getModuleInlineAsm(),
579 // Emit information about sections and GC, computing how many there are. Also
580 // compute the maximum alignment value.
581 std::map<std::string, unsigned> SectionMap;
582 std::map<std::string, unsigned> GCMap;
583 unsigned MaxAlignment = 0;
584 unsigned MaxGlobalType = 0;
585 for (const GlobalValue &GV : M->globals()) {
586 MaxAlignment = std::max(MaxAlignment, GV.getAlignment());
587 MaxGlobalType = std::max(MaxGlobalType, VE.getTypeID(GV.getType()));
588 if (GV.hasSection()) {
589 // Give section names unique ID's.
590 unsigned &Entry = SectionMap[GV.getSection()];
592 WriteStringRecord(bitc::MODULE_CODE_SECTIONNAME, GV.getSection(),
594 Entry = SectionMap.size();
598 for (const Function &F : *M) {
599 MaxAlignment = std::max(MaxAlignment, F.getAlignment());
600 if (F.hasSection()) {
601 // Give section names unique ID's.
602 unsigned &Entry = SectionMap[F.getSection()];
604 WriteStringRecord(bitc::MODULE_CODE_SECTIONNAME, F.getSection(),
606 Entry = SectionMap.size();
610 // Same for GC names.
611 unsigned &Entry = GCMap[F.getGC()];
613 WriteStringRecord(bitc::MODULE_CODE_GCNAME, F.getGC(),
615 Entry = GCMap.size();
620 // Emit abbrev for globals, now that we know # sections and max alignment.
621 unsigned SimpleGVarAbbrev = 0;
622 if (!M->global_empty()) {
623 // Add an abbrev for common globals with no visibility or thread localness.
624 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
625 Abbv->Add(BitCodeAbbrevOp(bitc::MODULE_CODE_GLOBALVAR));
626 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed,
627 Log2_32_Ceil(MaxGlobalType+1)));
628 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // Constant.
629 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Initializer.
630 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 4)); // Linkage.
631 if (MaxAlignment == 0) // Alignment.
632 Abbv->Add(BitCodeAbbrevOp(0));
634 unsigned MaxEncAlignment = Log2_32(MaxAlignment)+1;
635 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed,
636 Log2_32_Ceil(MaxEncAlignment+1)));
638 if (SectionMap.empty()) // Section.
639 Abbv->Add(BitCodeAbbrevOp(0));
641 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed,
642 Log2_32_Ceil(SectionMap.size()+1)));
643 // Don't bother emitting vis + thread local.
644 SimpleGVarAbbrev = Stream.EmitAbbrev(Abbv);
647 // Emit the global variable information.
648 SmallVector<unsigned, 64> Vals;
649 for (const GlobalVariable &GV : M->globals()) {
650 unsigned AbbrevToUse = 0;
652 // GLOBALVAR: [type, isconst, initid,
653 // linkage, alignment, section, visibility, threadlocal,
654 // unnamed_addr, externally_initialized, dllstorageclass]
655 Vals.push_back(VE.getTypeID(GV.getType()));
656 Vals.push_back(GV.isConstant());
657 Vals.push_back(GV.isDeclaration() ? 0 :
658 (VE.getValueID(GV.getInitializer()) + 1));
659 Vals.push_back(getEncodedLinkage(GV));
660 Vals.push_back(Log2_32(GV.getAlignment())+1);
661 Vals.push_back(GV.hasSection() ? SectionMap[GV.getSection()] : 0);
662 if (GV.isThreadLocal() ||
663 GV.getVisibility() != GlobalValue::DefaultVisibility ||
664 GV.hasUnnamedAddr() || GV.isExternallyInitialized() ||
665 GV.getDLLStorageClass() != GlobalValue::DefaultStorageClass ||
667 Vals.push_back(getEncodedVisibility(GV));
668 Vals.push_back(getEncodedThreadLocalMode(GV));
669 Vals.push_back(GV.hasUnnamedAddr());
670 Vals.push_back(GV.isExternallyInitialized());
671 Vals.push_back(getEncodedDLLStorageClass(GV));
672 Vals.push_back(GV.hasComdat() ? VE.getComdatID(GV.getComdat()) : 0);
674 AbbrevToUse = SimpleGVarAbbrev;
677 Stream.EmitRecord(bitc::MODULE_CODE_GLOBALVAR, Vals, AbbrevToUse);
681 // Emit the function proto information.
682 for (const Function &F : *M) {
683 // FUNCTION: [type, callingconv, isproto, linkage, paramattrs, alignment,
684 // section, visibility, gc, unnamed_addr, prologuedata,
685 // dllstorageclass, comdat, prefixdata]
686 Vals.push_back(VE.getTypeID(F.getType()));
687 Vals.push_back(F.getCallingConv());
688 Vals.push_back(F.isDeclaration());
689 Vals.push_back(getEncodedLinkage(F));
690 Vals.push_back(VE.getAttributeID(F.getAttributes()));
691 Vals.push_back(Log2_32(F.getAlignment())+1);
692 Vals.push_back(F.hasSection() ? SectionMap[F.getSection()] : 0);
693 Vals.push_back(getEncodedVisibility(F));
694 Vals.push_back(F.hasGC() ? GCMap[F.getGC()] : 0);
695 Vals.push_back(F.hasUnnamedAddr());
696 Vals.push_back(F.hasPrologueData() ? (VE.getValueID(F.getPrologueData()) + 1)
698 Vals.push_back(getEncodedDLLStorageClass(F));
699 Vals.push_back(F.hasComdat() ? VE.getComdatID(F.getComdat()) : 0);
700 Vals.push_back(F.hasPrefixData() ? (VE.getValueID(F.getPrefixData()) + 1)
703 unsigned AbbrevToUse = 0;
704 Stream.EmitRecord(bitc::MODULE_CODE_FUNCTION, Vals, AbbrevToUse);
708 // Emit the alias information.
709 for (const GlobalAlias &A : M->aliases()) {
710 // ALIAS: [alias type, aliasee val#, linkage, visibility]
711 Vals.push_back(VE.getTypeID(A.getType()));
712 Vals.push_back(VE.getValueID(A.getAliasee()));
713 Vals.push_back(getEncodedLinkage(A));
714 Vals.push_back(getEncodedVisibility(A));
715 Vals.push_back(getEncodedDLLStorageClass(A));
716 Vals.push_back(getEncodedThreadLocalMode(A));
717 Vals.push_back(A.hasUnnamedAddr());
718 unsigned AbbrevToUse = 0;
719 Stream.EmitRecord(bitc::MODULE_CODE_ALIAS, Vals, AbbrevToUse);
724 static uint64_t GetOptimizationFlags(const Value *V) {
727 if (const auto *OBO = dyn_cast<OverflowingBinaryOperator>(V)) {
728 if (OBO->hasNoSignedWrap())
729 Flags |= 1 << bitc::OBO_NO_SIGNED_WRAP;
730 if (OBO->hasNoUnsignedWrap())
731 Flags |= 1 << bitc::OBO_NO_UNSIGNED_WRAP;
732 } else if (const auto *PEO = dyn_cast<PossiblyExactOperator>(V)) {
734 Flags |= 1 << bitc::PEO_EXACT;
735 } else if (const auto *FPMO = dyn_cast<FPMathOperator>(V)) {
736 if (FPMO->hasUnsafeAlgebra())
737 Flags |= FastMathFlags::UnsafeAlgebra;
738 if (FPMO->hasNoNaNs())
739 Flags |= FastMathFlags::NoNaNs;
740 if (FPMO->hasNoInfs())
741 Flags |= FastMathFlags::NoInfs;
742 if (FPMO->hasNoSignedZeros())
743 Flags |= FastMathFlags::NoSignedZeros;
744 if (FPMO->hasAllowReciprocal())
745 Flags |= FastMathFlags::AllowReciprocal;
751 static void WriteValueAsMetadata(const ValueAsMetadata *MD,
752 const ValueEnumerator &VE,
753 BitstreamWriter &Stream,
754 SmallVectorImpl<uint64_t> &Record) {
755 // Mimic an MDNode with a value as one operand.
756 Value *V = MD->getValue();
757 Record.push_back(VE.getTypeID(V->getType()));
758 Record.push_back(VE.getValueID(V));
759 Stream.EmitRecord(bitc::METADATA_VALUE, Record, 0);
763 static void WriteMDNode(const MDNode *N,
764 const ValueEnumerator &VE,
765 BitstreamWriter &Stream,
766 SmallVectorImpl<uint64_t> &Record) {
767 for (unsigned i = 0, e = N->getNumOperands(); i != e; ++i) {
768 Metadata *MD = N->getOperand(i);
773 assert(!isa<LocalAsMetadata>(MD) && "Unexpected function-local metadata");
774 Record.push_back(VE.getMetadataID(MD) + 1);
776 Stream.EmitRecord(N->isDistinct() ? bitc::METADATA_DISTINCT_NODE
777 : bitc::METADATA_NODE,
782 static void WriteMDLocation(const MDLocation *N, const ValueEnumerator &VE,
783 BitstreamWriter &Stream,
784 SmallVectorImpl<uint64_t> &Record,
786 Record.push_back(N->isDistinct());
787 Record.push_back(N->getLine());
788 Record.push_back(N->getColumn());
789 Record.push_back(VE.getMetadataID(N->getScope()));
791 // Always emit the inlined-at location, even though it's optional.
792 if (Metadata *InlinedAt = N->getInlinedAt())
793 Record.push_back(VE.getMetadataID(InlinedAt) + 1);
797 Stream.EmitRecord(bitc::METADATA_LOCATION, Record, Abbrev);
801 static void WriteModuleMetadata(const Module *M,
802 const ValueEnumerator &VE,
803 BitstreamWriter &Stream) {
804 const auto &MDs = VE.getMDs();
805 if (MDs.empty() && M->named_metadata_empty())
808 Stream.EnterSubblock(bitc::METADATA_BLOCK_ID, 3);
810 unsigned MDSAbbrev = 0;
811 if (VE.hasMDString()) {
812 // Abbrev for METADATA_STRING.
813 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
814 Abbv->Add(BitCodeAbbrevOp(bitc::METADATA_STRING));
815 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
816 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 8));
817 MDSAbbrev = Stream.EmitAbbrev(Abbv);
820 unsigned LocAbbrev = 0;
821 if (VE.hasMDLocation()) {
822 // Abbrev for METADATA_LOCATION.
824 // Assume the column is usually under 128, and always output the inlined-at
825 // location (it's never more expensive than building an array size 1).
826 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
827 Abbv->Add(BitCodeAbbrevOp(bitc::METADATA_LOCATION));
828 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1));
829 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));
830 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8));
831 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));
832 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));
833 LocAbbrev = Stream.EmitAbbrev(Abbv);
836 unsigned NameAbbrev = 0;
837 if (!M->named_metadata_empty()) {
838 // Abbrev for METADATA_NAME.
839 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
840 Abbv->Add(BitCodeAbbrevOp(bitc::METADATA_NAME));
841 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
842 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 8));
843 NameAbbrev = Stream.EmitAbbrev(Abbv);
846 SmallVector<uint64_t, 64> Record;
847 for (const Metadata *MD : MDs) {
848 if (const MDLocation *Loc = dyn_cast<MDLocation>(MD)) {
849 WriteMDLocation(Loc, VE, Stream, Record, LocAbbrev);
852 if (const MDNode *N = dyn_cast<MDNode>(MD)) {
853 WriteMDNode(N, VE, Stream, Record);
856 if (const auto *MDC = dyn_cast<ConstantAsMetadata>(MD)) {
857 WriteValueAsMetadata(MDC, VE, Stream, Record);
860 const MDString *MDS = cast<MDString>(MD);
861 // Code: [strchar x N]
862 Record.append(MDS->bytes_begin(), MDS->bytes_end());
864 // Emit the finished record.
865 Stream.EmitRecord(bitc::METADATA_STRING, Record, MDSAbbrev);
869 // Write named metadata.
870 for (const NamedMDNode &NMD : M->named_metadata()) {
872 StringRef Str = NMD.getName();
873 Record.append(Str.bytes_begin(), Str.bytes_end());
874 Stream.EmitRecord(bitc::METADATA_NAME, Record, NameAbbrev);
877 // Write named metadata operands.
878 for (const MDNode *N : NMD.operands())
879 Record.push_back(VE.getMetadataID(N));
880 Stream.EmitRecord(bitc::METADATA_NAMED_NODE, Record, 0);
887 static void WriteFunctionLocalMetadata(const Function &F,
888 const ValueEnumerator &VE,
889 BitstreamWriter &Stream) {
890 bool StartedMetadataBlock = false;
891 SmallVector<uint64_t, 64> Record;
892 const SmallVectorImpl<const LocalAsMetadata *> &MDs =
893 VE.getFunctionLocalMDs();
894 for (unsigned i = 0, e = MDs.size(); i != e; ++i) {
895 assert(MDs[i] && "Expected valid function-local metadata");
896 if (!StartedMetadataBlock) {
897 Stream.EnterSubblock(bitc::METADATA_BLOCK_ID, 3);
898 StartedMetadataBlock = true;
900 WriteValueAsMetadata(MDs[i], VE, Stream, Record);
903 if (StartedMetadataBlock)
907 static void WriteMetadataAttachment(const Function &F,
908 const ValueEnumerator &VE,
909 BitstreamWriter &Stream) {
910 Stream.EnterSubblock(bitc::METADATA_ATTACHMENT_ID, 3);
912 SmallVector<uint64_t, 64> Record;
914 // Write metadata attachments
915 // METADATA_ATTACHMENT - [m x [value, [n x [id, mdnode]]]
916 SmallVector<std::pair<unsigned, MDNode *>, 4> MDs;
918 for (Function::const_iterator BB = F.begin(), E = F.end(); BB != E; ++BB)
919 for (BasicBlock::const_iterator I = BB->begin(), E = BB->end();
922 I->getAllMetadataOtherThanDebugLoc(MDs);
924 // If no metadata, ignore instruction.
925 if (MDs.empty()) continue;
927 Record.push_back(VE.getInstructionID(I));
929 for (unsigned i = 0, e = MDs.size(); i != e; ++i) {
930 Record.push_back(MDs[i].first);
931 Record.push_back(VE.getMetadataID(MDs[i].second));
933 Stream.EmitRecord(bitc::METADATA_ATTACHMENT, Record, 0);
940 static void WriteModuleMetadataStore(const Module *M, BitstreamWriter &Stream) {
941 SmallVector<uint64_t, 64> Record;
943 // Write metadata kinds
944 // METADATA_KIND - [n x [id, name]]
945 SmallVector<StringRef, 8> Names;
946 M->getMDKindNames(Names);
948 if (Names.empty()) return;
950 Stream.EnterSubblock(bitc::METADATA_BLOCK_ID, 3);
952 for (unsigned MDKindID = 0, e = Names.size(); MDKindID != e; ++MDKindID) {
953 Record.push_back(MDKindID);
954 StringRef KName = Names[MDKindID];
955 Record.append(KName.begin(), KName.end());
957 Stream.EmitRecord(bitc::METADATA_KIND, Record, 0);
964 static void emitSignedInt64(SmallVectorImpl<uint64_t> &Vals, uint64_t V) {
966 Vals.push_back(V << 1);
968 Vals.push_back((-V << 1) | 1);
971 static void WriteConstants(unsigned FirstVal, unsigned LastVal,
972 const ValueEnumerator &VE,
973 BitstreamWriter &Stream, bool isGlobal) {
974 if (FirstVal == LastVal) return;
976 Stream.EnterSubblock(bitc::CONSTANTS_BLOCK_ID, 4);
978 unsigned AggregateAbbrev = 0;
979 unsigned String8Abbrev = 0;
980 unsigned CString7Abbrev = 0;
981 unsigned CString6Abbrev = 0;
982 // If this is a constant pool for the module, emit module-specific abbrevs.
984 // Abbrev for CST_CODE_AGGREGATE.
985 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
986 Abbv->Add(BitCodeAbbrevOp(bitc::CST_CODE_AGGREGATE));
987 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
988 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, Log2_32_Ceil(LastVal+1)));
989 AggregateAbbrev = Stream.EmitAbbrev(Abbv);
991 // Abbrev for CST_CODE_STRING.
992 Abbv = new BitCodeAbbrev();
993 Abbv->Add(BitCodeAbbrevOp(bitc::CST_CODE_STRING));
994 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
995 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 8));
996 String8Abbrev = Stream.EmitAbbrev(Abbv);
997 // Abbrev for CST_CODE_CSTRING.
998 Abbv = new BitCodeAbbrev();
999 Abbv->Add(BitCodeAbbrevOp(bitc::CST_CODE_CSTRING));
1000 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
1001 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 7));
1002 CString7Abbrev = Stream.EmitAbbrev(Abbv);
1003 // Abbrev for CST_CODE_CSTRING.
1004 Abbv = new BitCodeAbbrev();
1005 Abbv->Add(BitCodeAbbrevOp(bitc::CST_CODE_CSTRING));
1006 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
1007 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Char6));
1008 CString6Abbrev = Stream.EmitAbbrev(Abbv);
1011 SmallVector<uint64_t, 64> Record;
1013 const ValueEnumerator::ValueList &Vals = VE.getValues();
1014 Type *LastTy = nullptr;
1015 for (unsigned i = FirstVal; i != LastVal; ++i) {
1016 const Value *V = Vals[i].first;
1017 // If we need to switch types, do so now.
1018 if (V->getType() != LastTy) {
1019 LastTy = V->getType();
1020 Record.push_back(VE.getTypeID(LastTy));
1021 Stream.EmitRecord(bitc::CST_CODE_SETTYPE, Record,
1022 CONSTANTS_SETTYPE_ABBREV);
1026 if (const InlineAsm *IA = dyn_cast<InlineAsm>(V)) {
1027 Record.push_back(unsigned(IA->hasSideEffects()) |
1028 unsigned(IA->isAlignStack()) << 1 |
1029 unsigned(IA->getDialect()&1) << 2);
1031 // Add the asm string.
1032 const std::string &AsmStr = IA->getAsmString();
1033 Record.push_back(AsmStr.size());
1034 for (unsigned i = 0, e = AsmStr.size(); i != e; ++i)
1035 Record.push_back(AsmStr[i]);
1037 // Add the constraint string.
1038 const std::string &ConstraintStr = IA->getConstraintString();
1039 Record.push_back(ConstraintStr.size());
1040 for (unsigned i = 0, e = ConstraintStr.size(); i != e; ++i)
1041 Record.push_back(ConstraintStr[i]);
1042 Stream.EmitRecord(bitc::CST_CODE_INLINEASM, Record);
1046 const Constant *C = cast<Constant>(V);
1047 unsigned Code = -1U;
1048 unsigned AbbrevToUse = 0;
1049 if (C->isNullValue()) {
1050 Code = bitc::CST_CODE_NULL;
1051 } else if (isa<UndefValue>(C)) {
1052 Code = bitc::CST_CODE_UNDEF;
1053 } else if (const ConstantInt *IV = dyn_cast<ConstantInt>(C)) {
1054 if (IV->getBitWidth() <= 64) {
1055 uint64_t V = IV->getSExtValue();
1056 emitSignedInt64(Record, V);
1057 Code = bitc::CST_CODE_INTEGER;
1058 AbbrevToUse = CONSTANTS_INTEGER_ABBREV;
1059 } else { // Wide integers, > 64 bits in size.
1060 // We have an arbitrary precision integer value to write whose
1061 // bit width is > 64. However, in canonical unsigned integer
1062 // format it is likely that the high bits are going to be zero.
1063 // So, we only write the number of active words.
1064 unsigned NWords = IV->getValue().getActiveWords();
1065 const uint64_t *RawWords = IV->getValue().getRawData();
1066 for (unsigned i = 0; i != NWords; ++i) {
1067 emitSignedInt64(Record, RawWords[i]);
1069 Code = bitc::CST_CODE_WIDE_INTEGER;
1071 } else if (const ConstantFP *CFP = dyn_cast<ConstantFP>(C)) {
1072 Code = bitc::CST_CODE_FLOAT;
1073 Type *Ty = CFP->getType();
1074 if (Ty->isHalfTy() || Ty->isFloatTy() || Ty->isDoubleTy()) {
1075 Record.push_back(CFP->getValueAPF().bitcastToAPInt().getZExtValue());
1076 } else if (Ty->isX86_FP80Ty()) {
1077 // api needed to prevent premature destruction
1078 // bits are not in the same order as a normal i80 APInt, compensate.
1079 APInt api = CFP->getValueAPF().bitcastToAPInt();
1080 const uint64_t *p = api.getRawData();
1081 Record.push_back((p[1] << 48) | (p[0] >> 16));
1082 Record.push_back(p[0] & 0xffffLL);
1083 } else if (Ty->isFP128Ty() || Ty->isPPC_FP128Ty()) {
1084 APInt api = CFP->getValueAPF().bitcastToAPInt();
1085 const uint64_t *p = api.getRawData();
1086 Record.push_back(p[0]);
1087 Record.push_back(p[1]);
1089 assert (0 && "Unknown FP type!");
1091 } else if (isa<ConstantDataSequential>(C) &&
1092 cast<ConstantDataSequential>(C)->isString()) {
1093 const ConstantDataSequential *Str = cast<ConstantDataSequential>(C);
1094 // Emit constant strings specially.
1095 unsigned NumElts = Str->getNumElements();
1096 // If this is a null-terminated string, use the denser CSTRING encoding.
1097 if (Str->isCString()) {
1098 Code = bitc::CST_CODE_CSTRING;
1099 --NumElts; // Don't encode the null, which isn't allowed by char6.
1101 Code = bitc::CST_CODE_STRING;
1102 AbbrevToUse = String8Abbrev;
1104 bool isCStr7 = Code == bitc::CST_CODE_CSTRING;
1105 bool isCStrChar6 = Code == bitc::CST_CODE_CSTRING;
1106 for (unsigned i = 0; i != NumElts; ++i) {
1107 unsigned char V = Str->getElementAsInteger(i);
1108 Record.push_back(V);
1109 isCStr7 &= (V & 128) == 0;
1111 isCStrChar6 = BitCodeAbbrevOp::isChar6(V);
1115 AbbrevToUse = CString6Abbrev;
1117 AbbrevToUse = CString7Abbrev;
1118 } else if (const ConstantDataSequential *CDS =
1119 dyn_cast<ConstantDataSequential>(C)) {
1120 Code = bitc::CST_CODE_DATA;
1121 Type *EltTy = CDS->getType()->getElementType();
1122 if (isa<IntegerType>(EltTy)) {
1123 for (unsigned i = 0, e = CDS->getNumElements(); i != e; ++i)
1124 Record.push_back(CDS->getElementAsInteger(i));
1125 } else if (EltTy->isFloatTy()) {
1126 for (unsigned i = 0, e = CDS->getNumElements(); i != e; ++i) {
1127 union { float F; uint32_t I; };
1128 F = CDS->getElementAsFloat(i);
1129 Record.push_back(I);
1132 assert(EltTy->isDoubleTy() && "Unknown ConstantData element type");
1133 for (unsigned i = 0, e = CDS->getNumElements(); i != e; ++i) {
1134 union { double F; uint64_t I; };
1135 F = CDS->getElementAsDouble(i);
1136 Record.push_back(I);
1139 } else if (isa<ConstantArray>(C) || isa<ConstantStruct>(C) ||
1140 isa<ConstantVector>(C)) {
1141 Code = bitc::CST_CODE_AGGREGATE;
1142 for (unsigned i = 0, e = C->getNumOperands(); i != e; ++i)
1143 Record.push_back(VE.getValueID(C->getOperand(i)));
1144 AbbrevToUse = AggregateAbbrev;
1145 } else if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(C)) {
1146 switch (CE->getOpcode()) {
1148 if (Instruction::isCast(CE->getOpcode())) {
1149 Code = bitc::CST_CODE_CE_CAST;
1150 Record.push_back(GetEncodedCastOpcode(CE->getOpcode()));
1151 Record.push_back(VE.getTypeID(C->getOperand(0)->getType()));
1152 Record.push_back(VE.getValueID(C->getOperand(0)));
1153 AbbrevToUse = CONSTANTS_CE_CAST_Abbrev;
1155 assert(CE->getNumOperands() == 2 && "Unknown constant expr!");
1156 Code = bitc::CST_CODE_CE_BINOP;
1157 Record.push_back(GetEncodedBinaryOpcode(CE->getOpcode()));
1158 Record.push_back(VE.getValueID(C->getOperand(0)));
1159 Record.push_back(VE.getValueID(C->getOperand(1)));
1160 uint64_t Flags = GetOptimizationFlags(CE);
1162 Record.push_back(Flags);
1165 case Instruction::GetElementPtr:
1166 Code = bitc::CST_CODE_CE_GEP;
1167 if (cast<GEPOperator>(C)->isInBounds())
1168 Code = bitc::CST_CODE_CE_INBOUNDS_GEP;
1169 for (unsigned i = 0, e = CE->getNumOperands(); i != e; ++i) {
1170 Record.push_back(VE.getTypeID(C->getOperand(i)->getType()));
1171 Record.push_back(VE.getValueID(C->getOperand(i)));
1174 case Instruction::Select:
1175 Code = bitc::CST_CODE_CE_SELECT;
1176 Record.push_back(VE.getValueID(C->getOperand(0)));
1177 Record.push_back(VE.getValueID(C->getOperand(1)));
1178 Record.push_back(VE.getValueID(C->getOperand(2)));
1180 case Instruction::ExtractElement:
1181 Code = bitc::CST_CODE_CE_EXTRACTELT;
1182 Record.push_back(VE.getTypeID(C->getOperand(0)->getType()));
1183 Record.push_back(VE.getValueID(C->getOperand(0)));
1184 Record.push_back(VE.getTypeID(C->getOperand(1)->getType()));
1185 Record.push_back(VE.getValueID(C->getOperand(1)));
1187 case Instruction::InsertElement:
1188 Code = bitc::CST_CODE_CE_INSERTELT;
1189 Record.push_back(VE.getValueID(C->getOperand(0)));
1190 Record.push_back(VE.getValueID(C->getOperand(1)));
1191 Record.push_back(VE.getTypeID(C->getOperand(2)->getType()));
1192 Record.push_back(VE.getValueID(C->getOperand(2)));
1194 case Instruction::ShuffleVector:
1195 // If the return type and argument types are the same, this is a
1196 // standard shufflevector instruction. If the types are different,
1197 // then the shuffle is widening or truncating the input vectors, and
1198 // the argument type must also be encoded.
1199 if (C->getType() == C->getOperand(0)->getType()) {
1200 Code = bitc::CST_CODE_CE_SHUFFLEVEC;
1202 Code = bitc::CST_CODE_CE_SHUFVEC_EX;
1203 Record.push_back(VE.getTypeID(C->getOperand(0)->getType()));
1205 Record.push_back(VE.getValueID(C->getOperand(0)));
1206 Record.push_back(VE.getValueID(C->getOperand(1)));
1207 Record.push_back(VE.getValueID(C->getOperand(2)));
1209 case Instruction::ICmp:
1210 case Instruction::FCmp:
1211 Code = bitc::CST_CODE_CE_CMP;
1212 Record.push_back(VE.getTypeID(C->getOperand(0)->getType()));
1213 Record.push_back(VE.getValueID(C->getOperand(0)));
1214 Record.push_back(VE.getValueID(C->getOperand(1)));
1215 Record.push_back(CE->getPredicate());
1218 } else if (const BlockAddress *BA = dyn_cast<BlockAddress>(C)) {
1219 Code = bitc::CST_CODE_BLOCKADDRESS;
1220 Record.push_back(VE.getTypeID(BA->getFunction()->getType()));
1221 Record.push_back(VE.getValueID(BA->getFunction()));
1222 Record.push_back(VE.getGlobalBasicBlockID(BA->getBasicBlock()));
1227 llvm_unreachable("Unknown constant!");
1229 Stream.EmitRecord(Code, Record, AbbrevToUse);
1236 static void WriteModuleConstants(const ValueEnumerator &VE,
1237 BitstreamWriter &Stream) {
1238 const ValueEnumerator::ValueList &Vals = VE.getValues();
1240 // Find the first constant to emit, which is the first non-globalvalue value.
1241 // We know globalvalues have been emitted by WriteModuleInfo.
1242 for (unsigned i = 0, e = Vals.size(); i != e; ++i) {
1243 if (!isa<GlobalValue>(Vals[i].first)) {
1244 WriteConstants(i, Vals.size(), VE, Stream, true);
1250 /// PushValueAndType - The file has to encode both the value and type id for
1251 /// many values, because we need to know what type to create for forward
1252 /// references. However, most operands are not forward references, so this type
1253 /// field is not needed.
1255 /// This function adds V's value ID to Vals. If the value ID is higher than the
1256 /// instruction ID, then it is a forward reference, and it also includes the
1257 /// type ID. The value ID that is written is encoded relative to the InstID.
1258 static bool PushValueAndType(const Value *V, unsigned InstID,
1259 SmallVectorImpl<unsigned> &Vals,
1260 ValueEnumerator &VE) {
1261 unsigned ValID = VE.getValueID(V);
1262 // Make encoding relative to the InstID.
1263 Vals.push_back(InstID - ValID);
1264 if (ValID >= InstID) {
1265 Vals.push_back(VE.getTypeID(V->getType()));
1271 /// pushValue - Like PushValueAndType, but where the type of the value is
1272 /// omitted (perhaps it was already encoded in an earlier operand).
1273 static void pushValue(const Value *V, unsigned InstID,
1274 SmallVectorImpl<unsigned> &Vals,
1275 ValueEnumerator &VE) {
1276 unsigned ValID = VE.getValueID(V);
1277 Vals.push_back(InstID - ValID);
1280 static void pushValueSigned(const Value *V, unsigned InstID,
1281 SmallVectorImpl<uint64_t> &Vals,
1282 ValueEnumerator &VE) {
1283 unsigned ValID = VE.getValueID(V);
1284 int64_t diff = ((int32_t)InstID - (int32_t)ValID);
1285 emitSignedInt64(Vals, diff);
1288 /// WriteInstruction - Emit an instruction to the specified stream.
1289 static void WriteInstruction(const Instruction &I, unsigned InstID,
1290 ValueEnumerator &VE, BitstreamWriter &Stream,
1291 SmallVectorImpl<unsigned> &Vals) {
1293 unsigned AbbrevToUse = 0;
1294 VE.setInstructionID(&I);
1295 switch (I.getOpcode()) {
1297 if (Instruction::isCast(I.getOpcode())) {
1298 Code = bitc::FUNC_CODE_INST_CAST;
1299 if (!PushValueAndType(I.getOperand(0), InstID, Vals, VE))
1300 AbbrevToUse = FUNCTION_INST_CAST_ABBREV;
1301 Vals.push_back(VE.getTypeID(I.getType()));
1302 Vals.push_back(GetEncodedCastOpcode(I.getOpcode()));
1304 assert(isa<BinaryOperator>(I) && "Unknown instruction!");
1305 Code = bitc::FUNC_CODE_INST_BINOP;
1306 if (!PushValueAndType(I.getOperand(0), InstID, Vals, VE))
1307 AbbrevToUse = FUNCTION_INST_BINOP_ABBREV;
1308 pushValue(I.getOperand(1), InstID, Vals, VE);
1309 Vals.push_back(GetEncodedBinaryOpcode(I.getOpcode()));
1310 uint64_t Flags = GetOptimizationFlags(&I);
1312 if (AbbrevToUse == FUNCTION_INST_BINOP_ABBREV)
1313 AbbrevToUse = FUNCTION_INST_BINOP_FLAGS_ABBREV;
1314 Vals.push_back(Flags);
1319 case Instruction::GetElementPtr:
1320 Code = bitc::FUNC_CODE_INST_GEP;
1321 if (cast<GEPOperator>(&I)->isInBounds())
1322 Code = bitc::FUNC_CODE_INST_INBOUNDS_GEP;
1323 for (unsigned i = 0, e = I.getNumOperands(); i != e; ++i)
1324 PushValueAndType(I.getOperand(i), InstID, Vals, VE);
1326 case Instruction::ExtractValue: {
1327 Code = bitc::FUNC_CODE_INST_EXTRACTVAL;
1328 PushValueAndType(I.getOperand(0), InstID, Vals, VE);
1329 const ExtractValueInst *EVI = cast<ExtractValueInst>(&I);
1330 for (const unsigned *i = EVI->idx_begin(), *e = EVI->idx_end(); i != e; ++i)
1334 case Instruction::InsertValue: {
1335 Code = bitc::FUNC_CODE_INST_INSERTVAL;
1336 PushValueAndType(I.getOperand(0), InstID, Vals, VE);
1337 PushValueAndType(I.getOperand(1), InstID, Vals, VE);
1338 const InsertValueInst *IVI = cast<InsertValueInst>(&I);
1339 for (const unsigned *i = IVI->idx_begin(), *e = IVI->idx_end(); i != e; ++i)
1343 case Instruction::Select:
1344 Code = bitc::FUNC_CODE_INST_VSELECT;
1345 PushValueAndType(I.getOperand(1), InstID, Vals, VE);
1346 pushValue(I.getOperand(2), InstID, Vals, VE);
1347 PushValueAndType(I.getOperand(0), InstID, Vals, VE);
1349 case Instruction::ExtractElement:
1350 Code = bitc::FUNC_CODE_INST_EXTRACTELT;
1351 PushValueAndType(I.getOperand(0), InstID, Vals, VE);
1352 PushValueAndType(I.getOperand(1), InstID, Vals, VE);
1354 case Instruction::InsertElement:
1355 Code = bitc::FUNC_CODE_INST_INSERTELT;
1356 PushValueAndType(I.getOperand(0), InstID, Vals, VE);
1357 pushValue(I.getOperand(1), InstID, Vals, VE);
1358 PushValueAndType(I.getOperand(2), InstID, Vals, VE);
1360 case Instruction::ShuffleVector:
1361 Code = bitc::FUNC_CODE_INST_SHUFFLEVEC;
1362 PushValueAndType(I.getOperand(0), InstID, Vals, VE);
1363 pushValue(I.getOperand(1), InstID, Vals, VE);
1364 pushValue(I.getOperand(2), InstID, Vals, VE);
1366 case Instruction::ICmp:
1367 case Instruction::FCmp:
1368 // compare returning Int1Ty or vector of Int1Ty
1369 Code = bitc::FUNC_CODE_INST_CMP2;
1370 PushValueAndType(I.getOperand(0), InstID, Vals, VE);
1371 pushValue(I.getOperand(1), InstID, Vals, VE);
1372 Vals.push_back(cast<CmpInst>(I).getPredicate());
1375 case Instruction::Ret:
1377 Code = bitc::FUNC_CODE_INST_RET;
1378 unsigned NumOperands = I.getNumOperands();
1379 if (NumOperands == 0)
1380 AbbrevToUse = FUNCTION_INST_RET_VOID_ABBREV;
1381 else if (NumOperands == 1) {
1382 if (!PushValueAndType(I.getOperand(0), InstID, Vals, VE))
1383 AbbrevToUse = FUNCTION_INST_RET_VAL_ABBREV;
1385 for (unsigned i = 0, e = NumOperands; i != e; ++i)
1386 PushValueAndType(I.getOperand(i), InstID, Vals, VE);
1390 case Instruction::Br:
1392 Code = bitc::FUNC_CODE_INST_BR;
1393 const BranchInst &II = cast<BranchInst>(I);
1394 Vals.push_back(VE.getValueID(II.getSuccessor(0)));
1395 if (II.isConditional()) {
1396 Vals.push_back(VE.getValueID(II.getSuccessor(1)));
1397 pushValue(II.getCondition(), InstID, Vals, VE);
1401 case Instruction::Switch:
1403 Code = bitc::FUNC_CODE_INST_SWITCH;
1404 const SwitchInst &SI = cast<SwitchInst>(I);
1405 Vals.push_back(VE.getTypeID(SI.getCondition()->getType()));
1406 pushValue(SI.getCondition(), InstID, Vals, VE);
1407 Vals.push_back(VE.getValueID(SI.getDefaultDest()));
1408 for (SwitchInst::ConstCaseIt i = SI.case_begin(), e = SI.case_end();
1410 Vals.push_back(VE.getValueID(i.getCaseValue()));
1411 Vals.push_back(VE.getValueID(i.getCaseSuccessor()));
1415 case Instruction::IndirectBr:
1416 Code = bitc::FUNC_CODE_INST_INDIRECTBR;
1417 Vals.push_back(VE.getTypeID(I.getOperand(0)->getType()));
1418 // Encode the address operand as relative, but not the basic blocks.
1419 pushValue(I.getOperand(0), InstID, Vals, VE);
1420 for (unsigned i = 1, e = I.getNumOperands(); i != e; ++i)
1421 Vals.push_back(VE.getValueID(I.getOperand(i)));
1424 case Instruction::Invoke: {
1425 const InvokeInst *II = cast<InvokeInst>(&I);
1426 const Value *Callee(II->getCalledValue());
1427 PointerType *PTy = cast<PointerType>(Callee->getType());
1428 FunctionType *FTy = cast<FunctionType>(PTy->getElementType());
1429 Code = bitc::FUNC_CODE_INST_INVOKE;
1431 Vals.push_back(VE.getAttributeID(II->getAttributes()));
1432 Vals.push_back(II->getCallingConv());
1433 Vals.push_back(VE.getValueID(II->getNormalDest()));
1434 Vals.push_back(VE.getValueID(II->getUnwindDest()));
1435 PushValueAndType(Callee, InstID, Vals, VE);
1437 // Emit value #'s for the fixed parameters.
1438 for (unsigned i = 0, e = FTy->getNumParams(); i != e; ++i)
1439 pushValue(I.getOperand(i), InstID, Vals, VE); // fixed param.
1441 // Emit type/value pairs for varargs params.
1442 if (FTy->isVarArg()) {
1443 for (unsigned i = FTy->getNumParams(), e = I.getNumOperands()-3;
1445 PushValueAndType(I.getOperand(i), InstID, Vals, VE); // vararg
1449 case Instruction::Resume:
1450 Code = bitc::FUNC_CODE_INST_RESUME;
1451 PushValueAndType(I.getOperand(0), InstID, Vals, VE);
1453 case Instruction::Unreachable:
1454 Code = bitc::FUNC_CODE_INST_UNREACHABLE;
1455 AbbrevToUse = FUNCTION_INST_UNREACHABLE_ABBREV;
1458 case Instruction::PHI: {
1459 const PHINode &PN = cast<PHINode>(I);
1460 Code = bitc::FUNC_CODE_INST_PHI;
1461 // With the newer instruction encoding, forward references could give
1462 // negative valued IDs. This is most common for PHIs, so we use
1464 SmallVector<uint64_t, 128> Vals64;
1465 Vals64.push_back(VE.getTypeID(PN.getType()));
1466 for (unsigned i = 0, e = PN.getNumIncomingValues(); i != e; ++i) {
1467 pushValueSigned(PN.getIncomingValue(i), InstID, Vals64, VE);
1468 Vals64.push_back(VE.getValueID(PN.getIncomingBlock(i)));
1470 // Emit a Vals64 vector and exit.
1471 Stream.EmitRecord(Code, Vals64, AbbrevToUse);
1476 case Instruction::LandingPad: {
1477 const LandingPadInst &LP = cast<LandingPadInst>(I);
1478 Code = bitc::FUNC_CODE_INST_LANDINGPAD;
1479 Vals.push_back(VE.getTypeID(LP.getType()));
1480 PushValueAndType(LP.getPersonalityFn(), InstID, Vals, VE);
1481 Vals.push_back(LP.isCleanup());
1482 Vals.push_back(LP.getNumClauses());
1483 for (unsigned I = 0, E = LP.getNumClauses(); I != E; ++I) {
1485 Vals.push_back(LandingPadInst::Catch);
1487 Vals.push_back(LandingPadInst::Filter);
1488 PushValueAndType(LP.getClause(I), InstID, Vals, VE);
1493 case Instruction::Alloca: {
1494 Code = bitc::FUNC_CODE_INST_ALLOCA;
1495 Vals.push_back(VE.getTypeID(I.getType()));
1496 Vals.push_back(VE.getTypeID(I.getOperand(0)->getType()));
1497 Vals.push_back(VE.getValueID(I.getOperand(0))); // size.
1498 const AllocaInst &AI = cast<AllocaInst>(I);
1499 unsigned AlignRecord = Log2_32(AI.getAlignment()) + 1;
1500 assert(Log2_32(Value::MaximumAlignment) + 1 < 1 << 5 &&
1501 "not enough bits for maximum alignment");
1502 assert(AlignRecord < 1 << 5 && "alignment greater than 1 << 64");
1503 AlignRecord |= AI.isUsedWithInAlloca() << 5;
1504 Vals.push_back(AlignRecord);
1508 case Instruction::Load:
1509 if (cast<LoadInst>(I).isAtomic()) {
1510 Code = bitc::FUNC_CODE_INST_LOADATOMIC;
1511 PushValueAndType(I.getOperand(0), InstID, Vals, VE);
1513 Code = bitc::FUNC_CODE_INST_LOAD;
1514 if (!PushValueAndType(I.getOperand(0), InstID, Vals, VE)) // ptr
1515 AbbrevToUse = FUNCTION_INST_LOAD_ABBREV;
1517 Vals.push_back(Log2_32(cast<LoadInst>(I).getAlignment())+1);
1518 Vals.push_back(cast<LoadInst>(I).isVolatile());
1519 if (cast<LoadInst>(I).isAtomic()) {
1520 Vals.push_back(GetEncodedOrdering(cast<LoadInst>(I).getOrdering()));
1521 Vals.push_back(GetEncodedSynchScope(cast<LoadInst>(I).getSynchScope()));
1524 case Instruction::Store:
1525 if (cast<StoreInst>(I).isAtomic())
1526 Code = bitc::FUNC_CODE_INST_STOREATOMIC;
1528 Code = bitc::FUNC_CODE_INST_STORE;
1529 PushValueAndType(I.getOperand(1), InstID, Vals, VE); // ptrty + ptr
1530 pushValue(I.getOperand(0), InstID, Vals, VE); // val.
1531 Vals.push_back(Log2_32(cast<StoreInst>(I).getAlignment())+1);
1532 Vals.push_back(cast<StoreInst>(I).isVolatile());
1533 if (cast<StoreInst>(I).isAtomic()) {
1534 Vals.push_back(GetEncodedOrdering(cast<StoreInst>(I).getOrdering()));
1535 Vals.push_back(GetEncodedSynchScope(cast<StoreInst>(I).getSynchScope()));
1538 case Instruction::AtomicCmpXchg:
1539 Code = bitc::FUNC_CODE_INST_CMPXCHG;
1540 PushValueAndType(I.getOperand(0), InstID, Vals, VE); // ptrty + ptr
1541 pushValue(I.getOperand(1), InstID, Vals, VE); // cmp.
1542 pushValue(I.getOperand(2), InstID, Vals, VE); // newval.
1543 Vals.push_back(cast<AtomicCmpXchgInst>(I).isVolatile());
1544 Vals.push_back(GetEncodedOrdering(
1545 cast<AtomicCmpXchgInst>(I).getSuccessOrdering()));
1546 Vals.push_back(GetEncodedSynchScope(
1547 cast<AtomicCmpXchgInst>(I).getSynchScope()));
1548 Vals.push_back(GetEncodedOrdering(
1549 cast<AtomicCmpXchgInst>(I).getFailureOrdering()));
1550 Vals.push_back(cast<AtomicCmpXchgInst>(I).isWeak());
1552 case Instruction::AtomicRMW:
1553 Code = bitc::FUNC_CODE_INST_ATOMICRMW;
1554 PushValueAndType(I.getOperand(0), InstID, Vals, VE); // ptrty + ptr
1555 pushValue(I.getOperand(1), InstID, Vals, VE); // val.
1556 Vals.push_back(GetEncodedRMWOperation(
1557 cast<AtomicRMWInst>(I).getOperation()));
1558 Vals.push_back(cast<AtomicRMWInst>(I).isVolatile());
1559 Vals.push_back(GetEncodedOrdering(cast<AtomicRMWInst>(I).getOrdering()));
1560 Vals.push_back(GetEncodedSynchScope(
1561 cast<AtomicRMWInst>(I).getSynchScope()));
1563 case Instruction::Fence:
1564 Code = bitc::FUNC_CODE_INST_FENCE;
1565 Vals.push_back(GetEncodedOrdering(cast<FenceInst>(I).getOrdering()));
1566 Vals.push_back(GetEncodedSynchScope(cast<FenceInst>(I).getSynchScope()));
1568 case Instruction::Call: {
1569 const CallInst &CI = cast<CallInst>(I);
1570 PointerType *PTy = cast<PointerType>(CI.getCalledValue()->getType());
1571 FunctionType *FTy = cast<FunctionType>(PTy->getElementType());
1573 Code = bitc::FUNC_CODE_INST_CALL;
1575 Vals.push_back(VE.getAttributeID(CI.getAttributes()));
1576 Vals.push_back((CI.getCallingConv() << 1) | unsigned(CI.isTailCall()) |
1577 unsigned(CI.isMustTailCall()) << 14);
1578 PushValueAndType(CI.getCalledValue(), InstID, Vals, VE); // Callee
1580 // Emit value #'s for the fixed parameters.
1581 for (unsigned i = 0, e = FTy->getNumParams(); i != e; ++i) {
1582 // Check for labels (can happen with asm labels).
1583 if (FTy->getParamType(i)->isLabelTy())
1584 Vals.push_back(VE.getValueID(CI.getArgOperand(i)));
1586 pushValue(CI.getArgOperand(i), InstID, Vals, VE); // fixed param.
1589 // Emit type/value pairs for varargs params.
1590 if (FTy->isVarArg()) {
1591 for (unsigned i = FTy->getNumParams(), e = CI.getNumArgOperands();
1593 PushValueAndType(CI.getArgOperand(i), InstID, Vals, VE); // varargs
1597 case Instruction::VAArg:
1598 Code = bitc::FUNC_CODE_INST_VAARG;
1599 Vals.push_back(VE.getTypeID(I.getOperand(0)->getType())); // valistty
1600 pushValue(I.getOperand(0), InstID, Vals, VE); // valist.
1601 Vals.push_back(VE.getTypeID(I.getType())); // restype.
1605 Stream.EmitRecord(Code, Vals, AbbrevToUse);
1609 // Emit names for globals/functions etc.
1610 static void WriteValueSymbolTable(const ValueSymbolTable &VST,
1611 const ValueEnumerator &VE,
1612 BitstreamWriter &Stream) {
1613 if (VST.empty()) return;
1614 Stream.EnterSubblock(bitc::VALUE_SYMTAB_BLOCK_ID, 4);
1616 // FIXME: Set up the abbrev, we know how many values there are!
1617 // FIXME: We know if the type names can use 7-bit ascii.
1618 SmallVector<unsigned, 64> NameVals;
1620 for (ValueSymbolTable::const_iterator SI = VST.begin(), SE = VST.end();
1623 const ValueName &Name = *SI;
1625 // Figure out the encoding to use for the name.
1627 bool isChar6 = true;
1628 for (const char *C = Name.getKeyData(), *E = C+Name.getKeyLength();
1631 isChar6 = BitCodeAbbrevOp::isChar6(*C);
1632 if ((unsigned char)*C & 128) {
1634 break; // don't bother scanning the rest.
1638 unsigned AbbrevToUse = VST_ENTRY_8_ABBREV;
1640 // VST_ENTRY: [valueid, namechar x N]
1641 // VST_BBENTRY: [bbid, namechar x N]
1643 if (isa<BasicBlock>(SI->getValue())) {
1644 Code = bitc::VST_CODE_BBENTRY;
1646 AbbrevToUse = VST_BBENTRY_6_ABBREV;
1648 Code = bitc::VST_CODE_ENTRY;
1650 AbbrevToUse = VST_ENTRY_6_ABBREV;
1652 AbbrevToUse = VST_ENTRY_7_ABBREV;
1655 NameVals.push_back(VE.getValueID(SI->getValue()));
1656 for (const char *P = Name.getKeyData(),
1657 *E = Name.getKeyData()+Name.getKeyLength(); P != E; ++P)
1658 NameVals.push_back((unsigned char)*P);
1660 // Emit the finished record.
1661 Stream.EmitRecord(Code, NameVals, AbbrevToUse);
1667 static void WriteUseList(ValueEnumerator &VE, UseListOrder &&Order,
1668 BitstreamWriter &Stream) {
1669 assert(Order.Shuffle.size() >= 2 && "Shuffle too small");
1671 if (isa<BasicBlock>(Order.V))
1672 Code = bitc::USELIST_CODE_BB;
1674 Code = bitc::USELIST_CODE_DEFAULT;
1676 SmallVector<uint64_t, 64> Record;
1677 for (unsigned I : Order.Shuffle)
1678 Record.push_back(I);
1679 Record.push_back(VE.getValueID(Order.V));
1680 Stream.EmitRecord(Code, Record);
1683 static void WriteUseListBlock(const Function *F, ValueEnumerator &VE,
1684 BitstreamWriter &Stream) {
1685 auto hasMore = [&]() {
1686 return !VE.UseListOrders.empty() && VE.UseListOrders.back().F == F;
1692 Stream.EnterSubblock(bitc::USELIST_BLOCK_ID, 3);
1694 WriteUseList(VE, std::move(VE.UseListOrders.back()), Stream);
1695 VE.UseListOrders.pop_back();
1700 /// WriteFunction - Emit a function body to the module stream.
1701 static void WriteFunction(const Function &F, ValueEnumerator &VE,
1702 BitstreamWriter &Stream) {
1703 Stream.EnterSubblock(bitc::FUNCTION_BLOCK_ID, 4);
1704 VE.incorporateFunction(F);
1706 SmallVector<unsigned, 64> Vals;
1708 // Emit the number of basic blocks, so the reader can create them ahead of
1710 Vals.push_back(VE.getBasicBlocks().size());
1711 Stream.EmitRecord(bitc::FUNC_CODE_DECLAREBLOCKS, Vals);
1714 // If there are function-local constants, emit them now.
1715 unsigned CstStart, CstEnd;
1716 VE.getFunctionConstantRange(CstStart, CstEnd);
1717 WriteConstants(CstStart, CstEnd, VE, Stream, false);
1719 // If there is function-local metadata, emit it now.
1720 WriteFunctionLocalMetadata(F, VE, Stream);
1722 // Keep a running idea of what the instruction ID is.
1723 unsigned InstID = CstEnd;
1725 bool NeedsMetadataAttachment = false;
1729 // Finally, emit all the instructions, in order.
1730 for (Function::const_iterator BB = F.begin(), E = F.end(); BB != E; ++BB)
1731 for (BasicBlock::const_iterator I = BB->begin(), E = BB->end();
1733 WriteInstruction(*I, InstID, VE, Stream, Vals);
1735 if (!I->getType()->isVoidTy())
1738 // If the instruction has metadata, write a metadata attachment later.
1739 NeedsMetadataAttachment |= I->hasMetadataOtherThanDebugLoc();
1741 // If the instruction has a debug location, emit it.
1742 DebugLoc DL = I->getDebugLoc();
1743 if (DL.isUnknown()) {
1745 } else if (DL == LastDL) {
1746 // Just repeat the same debug loc as last time.
1747 Stream.EmitRecord(bitc::FUNC_CODE_DEBUG_LOC_AGAIN, Vals);
1750 DL.getScopeAndInlinedAt(Scope, IA, I->getContext());
1751 assert(Scope && "Expected valid scope");
1753 Vals.push_back(DL.getLine());
1754 Vals.push_back(DL.getCol());
1755 Vals.push_back(Scope ? VE.getMetadataID(Scope) + 1 : 0);
1756 Vals.push_back(IA ? VE.getMetadataID(IA) + 1 : 0);
1757 Stream.EmitRecord(bitc::FUNC_CODE_DEBUG_LOC, Vals);
1764 // Emit names for all the instructions etc.
1765 WriteValueSymbolTable(F.getValueSymbolTable(), VE, Stream);
1767 if (NeedsMetadataAttachment)
1768 WriteMetadataAttachment(F, VE, Stream);
1769 if (shouldPreserveBitcodeUseListOrder())
1770 WriteUseListBlock(&F, VE, Stream);
1775 // Emit blockinfo, which defines the standard abbreviations etc.
1776 static void WriteBlockInfo(const ValueEnumerator &VE, BitstreamWriter &Stream) {
1777 // We only want to emit block info records for blocks that have multiple
1778 // instances: CONSTANTS_BLOCK, FUNCTION_BLOCK and VALUE_SYMTAB_BLOCK.
1779 // Other blocks can define their abbrevs inline.
1780 Stream.EnterBlockInfoBlock(2);
1782 { // 8-bit fixed-width VST_ENTRY/VST_BBENTRY strings.
1783 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
1784 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 3));
1785 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8));
1786 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
1787 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 8));
1788 if (Stream.EmitBlockInfoAbbrev(bitc::VALUE_SYMTAB_BLOCK_ID,
1789 Abbv) != VST_ENTRY_8_ABBREV)
1790 llvm_unreachable("Unexpected abbrev ordering!");
1793 { // 7-bit fixed width VST_ENTRY strings.
1794 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
1795 Abbv->Add(BitCodeAbbrevOp(bitc::VST_CODE_ENTRY));
1796 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8));
1797 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
1798 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 7));
1799 if (Stream.EmitBlockInfoAbbrev(bitc::VALUE_SYMTAB_BLOCK_ID,
1800 Abbv) != VST_ENTRY_7_ABBREV)
1801 llvm_unreachable("Unexpected abbrev ordering!");
1803 { // 6-bit char6 VST_ENTRY strings.
1804 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
1805 Abbv->Add(BitCodeAbbrevOp(bitc::VST_CODE_ENTRY));
1806 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8));
1807 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
1808 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Char6));
1809 if (Stream.EmitBlockInfoAbbrev(bitc::VALUE_SYMTAB_BLOCK_ID,
1810 Abbv) != VST_ENTRY_6_ABBREV)
1811 llvm_unreachable("Unexpected abbrev ordering!");
1813 { // 6-bit char6 VST_BBENTRY strings.
1814 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
1815 Abbv->Add(BitCodeAbbrevOp(bitc::VST_CODE_BBENTRY));
1816 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8));
1817 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
1818 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Char6));
1819 if (Stream.EmitBlockInfoAbbrev(bitc::VALUE_SYMTAB_BLOCK_ID,
1820 Abbv) != VST_BBENTRY_6_ABBREV)
1821 llvm_unreachable("Unexpected abbrev ordering!");
1826 { // SETTYPE abbrev for CONSTANTS_BLOCK.
1827 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
1828 Abbv->Add(BitCodeAbbrevOp(bitc::CST_CODE_SETTYPE));
1829 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed,
1830 Log2_32_Ceil(VE.getTypes().size()+1)));
1831 if (Stream.EmitBlockInfoAbbrev(bitc::CONSTANTS_BLOCK_ID,
1832 Abbv) != CONSTANTS_SETTYPE_ABBREV)
1833 llvm_unreachable("Unexpected abbrev ordering!");
1836 { // INTEGER abbrev for CONSTANTS_BLOCK.
1837 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
1838 Abbv->Add(BitCodeAbbrevOp(bitc::CST_CODE_INTEGER));
1839 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8));
1840 if (Stream.EmitBlockInfoAbbrev(bitc::CONSTANTS_BLOCK_ID,
1841 Abbv) != CONSTANTS_INTEGER_ABBREV)
1842 llvm_unreachable("Unexpected abbrev ordering!");
1845 { // CE_CAST abbrev for CONSTANTS_BLOCK.
1846 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
1847 Abbv->Add(BitCodeAbbrevOp(bitc::CST_CODE_CE_CAST));
1848 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 4)); // cast opc
1849 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, // typeid
1850 Log2_32_Ceil(VE.getTypes().size()+1)));
1851 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8)); // value id
1853 if (Stream.EmitBlockInfoAbbrev(bitc::CONSTANTS_BLOCK_ID,
1854 Abbv) != CONSTANTS_CE_CAST_Abbrev)
1855 llvm_unreachable("Unexpected abbrev ordering!");
1857 { // NULL abbrev for CONSTANTS_BLOCK.
1858 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
1859 Abbv->Add(BitCodeAbbrevOp(bitc::CST_CODE_NULL));
1860 if (Stream.EmitBlockInfoAbbrev(bitc::CONSTANTS_BLOCK_ID,
1861 Abbv) != CONSTANTS_NULL_Abbrev)
1862 llvm_unreachable("Unexpected abbrev ordering!");
1865 // FIXME: This should only use space for first class types!
1867 { // INST_LOAD abbrev for FUNCTION_BLOCK.
1868 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
1869 Abbv->Add(BitCodeAbbrevOp(bitc::FUNC_CODE_INST_LOAD));
1870 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Ptr
1871 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 4)); // Align
1872 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // volatile
1873 if (Stream.EmitBlockInfoAbbrev(bitc::FUNCTION_BLOCK_ID,
1874 Abbv) != FUNCTION_INST_LOAD_ABBREV)
1875 llvm_unreachable("Unexpected abbrev ordering!");
1877 { // INST_BINOP abbrev for FUNCTION_BLOCK.
1878 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
1879 Abbv->Add(BitCodeAbbrevOp(bitc::FUNC_CODE_INST_BINOP));
1880 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // LHS
1881 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // RHS
1882 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 4)); // opc
1883 if (Stream.EmitBlockInfoAbbrev(bitc::FUNCTION_BLOCK_ID,
1884 Abbv) != FUNCTION_INST_BINOP_ABBREV)
1885 llvm_unreachable("Unexpected abbrev ordering!");
1887 { // INST_BINOP_FLAGS abbrev for FUNCTION_BLOCK.
1888 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
1889 Abbv->Add(BitCodeAbbrevOp(bitc::FUNC_CODE_INST_BINOP));
1890 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // LHS
1891 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // RHS
1892 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 4)); // opc
1893 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 7)); // flags
1894 if (Stream.EmitBlockInfoAbbrev(bitc::FUNCTION_BLOCK_ID,
1895 Abbv) != FUNCTION_INST_BINOP_FLAGS_ABBREV)
1896 llvm_unreachable("Unexpected abbrev ordering!");
1898 { // INST_CAST abbrev for FUNCTION_BLOCK.
1899 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
1900 Abbv->Add(BitCodeAbbrevOp(bitc::FUNC_CODE_INST_CAST));
1901 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // OpVal
1902 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, // dest ty
1903 Log2_32_Ceil(VE.getTypes().size()+1)));
1904 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 4)); // opc
1905 if (Stream.EmitBlockInfoAbbrev(bitc::FUNCTION_BLOCK_ID,
1906 Abbv) != FUNCTION_INST_CAST_ABBREV)
1907 llvm_unreachable("Unexpected abbrev ordering!");
1910 { // INST_RET abbrev for FUNCTION_BLOCK.
1911 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
1912 Abbv->Add(BitCodeAbbrevOp(bitc::FUNC_CODE_INST_RET));
1913 if (Stream.EmitBlockInfoAbbrev(bitc::FUNCTION_BLOCK_ID,
1914 Abbv) != FUNCTION_INST_RET_VOID_ABBREV)
1915 llvm_unreachable("Unexpected abbrev ordering!");
1917 { // INST_RET abbrev for FUNCTION_BLOCK.
1918 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
1919 Abbv->Add(BitCodeAbbrevOp(bitc::FUNC_CODE_INST_RET));
1920 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // ValID
1921 if (Stream.EmitBlockInfoAbbrev(bitc::FUNCTION_BLOCK_ID,
1922 Abbv) != FUNCTION_INST_RET_VAL_ABBREV)
1923 llvm_unreachable("Unexpected abbrev ordering!");
1925 { // INST_UNREACHABLE abbrev for FUNCTION_BLOCK.
1926 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
1927 Abbv->Add(BitCodeAbbrevOp(bitc::FUNC_CODE_INST_UNREACHABLE));
1928 if (Stream.EmitBlockInfoAbbrev(bitc::FUNCTION_BLOCK_ID,
1929 Abbv) != FUNCTION_INST_UNREACHABLE_ABBREV)
1930 llvm_unreachable("Unexpected abbrev ordering!");
1936 /// WriteModule - Emit the specified module to the bitstream.
1937 static void WriteModule(const Module *M, BitstreamWriter &Stream) {
1938 Stream.EnterSubblock(bitc::MODULE_BLOCK_ID, 3);
1940 SmallVector<unsigned, 1> Vals;
1941 unsigned CurVersion = 1;
1942 Vals.push_back(CurVersion);
1943 Stream.EmitRecord(bitc::MODULE_CODE_VERSION, Vals);
1945 // Analyze the module, enumerating globals, functions, etc.
1946 ValueEnumerator VE(*M);
1948 // Emit blockinfo, which defines the standard abbreviations etc.
1949 WriteBlockInfo(VE, Stream);
1951 // Emit information about attribute groups.
1952 WriteAttributeGroupTable(VE, Stream);
1954 // Emit information about parameter attributes.
1955 WriteAttributeTable(VE, Stream);
1957 // Emit information describing all of the types in the module.
1958 WriteTypeTable(VE, Stream);
1960 writeComdats(VE, Stream);
1962 // Emit top-level description of module, including target triple, inline asm,
1963 // descriptors for global variables, and function prototype info.
1964 WriteModuleInfo(M, VE, Stream);
1967 WriteModuleConstants(VE, Stream);
1970 WriteModuleMetadata(M, VE, Stream);
1973 WriteModuleMetadataStore(M, Stream);
1975 // Emit names for globals/functions etc.
1976 WriteValueSymbolTable(M->getValueSymbolTable(), VE, Stream);
1978 // Emit module-level use-lists.
1979 if (shouldPreserveBitcodeUseListOrder())
1980 WriteUseListBlock(nullptr, VE, Stream);
1982 // Emit function bodies.
1983 for (Module::const_iterator F = M->begin(), E = M->end(); F != E; ++F)
1984 if (!F->isDeclaration())
1985 WriteFunction(*F, VE, Stream);
1990 /// EmitDarwinBCHeader - If generating a bc file on darwin, we have to emit a
1991 /// header and trailer to make it compatible with the system archiver. To do
1992 /// this we emit the following header, and then emit a trailer that pads the
1993 /// file out to be a multiple of 16 bytes.
1995 /// struct bc_header {
1996 /// uint32_t Magic; // 0x0B17C0DE
1997 /// uint32_t Version; // Version, currently always 0.
1998 /// uint32_t BitcodeOffset; // Offset to traditional bitcode file.
1999 /// uint32_t BitcodeSize; // Size of traditional bitcode file.
2000 /// uint32_t CPUType; // CPU specifier.
2001 /// ... potentially more later ...
2004 DarwinBCSizeFieldOffset = 3*4, // Offset to bitcode_size.
2005 DarwinBCHeaderSize = 5*4
2008 static void WriteInt32ToBuffer(uint32_t Value, SmallVectorImpl<char> &Buffer,
2009 uint32_t &Position) {
2010 Buffer[Position + 0] = (unsigned char) (Value >> 0);
2011 Buffer[Position + 1] = (unsigned char) (Value >> 8);
2012 Buffer[Position + 2] = (unsigned char) (Value >> 16);
2013 Buffer[Position + 3] = (unsigned char) (Value >> 24);
2017 static void EmitDarwinBCHeaderAndTrailer(SmallVectorImpl<char> &Buffer,
2019 unsigned CPUType = ~0U;
2021 // Match x86_64-*, i[3-9]86-*, powerpc-*, powerpc64-*, arm-*, thumb-*,
2022 // armv[0-9]-*, thumbv[0-9]-*, armv5te-*, or armv6t2-*. The CPUType is a magic
2023 // number from /usr/include/mach/machine.h. It is ok to reproduce the
2024 // specific constants here because they are implicitly part of the Darwin ABI.
2026 DARWIN_CPU_ARCH_ABI64 = 0x01000000,
2027 DARWIN_CPU_TYPE_X86 = 7,
2028 DARWIN_CPU_TYPE_ARM = 12,
2029 DARWIN_CPU_TYPE_POWERPC = 18
2032 Triple::ArchType Arch = TT.getArch();
2033 if (Arch == Triple::x86_64)
2034 CPUType = DARWIN_CPU_TYPE_X86 | DARWIN_CPU_ARCH_ABI64;
2035 else if (Arch == Triple::x86)
2036 CPUType = DARWIN_CPU_TYPE_X86;
2037 else if (Arch == Triple::ppc)
2038 CPUType = DARWIN_CPU_TYPE_POWERPC;
2039 else if (Arch == Triple::ppc64)
2040 CPUType = DARWIN_CPU_TYPE_POWERPC | DARWIN_CPU_ARCH_ABI64;
2041 else if (Arch == Triple::arm || Arch == Triple::thumb)
2042 CPUType = DARWIN_CPU_TYPE_ARM;
2044 // Traditional Bitcode starts after header.
2045 assert(Buffer.size() >= DarwinBCHeaderSize &&
2046 "Expected header size to be reserved");
2047 unsigned BCOffset = DarwinBCHeaderSize;
2048 unsigned BCSize = Buffer.size()-DarwinBCHeaderSize;
2050 // Write the magic and version.
2051 unsigned Position = 0;
2052 WriteInt32ToBuffer(0x0B17C0DE , Buffer, Position);
2053 WriteInt32ToBuffer(0 , Buffer, Position); // Version.
2054 WriteInt32ToBuffer(BCOffset , Buffer, Position);
2055 WriteInt32ToBuffer(BCSize , Buffer, Position);
2056 WriteInt32ToBuffer(CPUType , Buffer, Position);
2058 // If the file is not a multiple of 16 bytes, insert dummy padding.
2059 while (Buffer.size() & 15)
2060 Buffer.push_back(0);
2063 /// WriteBitcodeToFile - Write the specified module to the specified output
2065 void llvm::WriteBitcodeToFile(const Module *M, raw_ostream &Out) {
2066 SmallVector<char, 0> Buffer;
2067 Buffer.reserve(256*1024);
2069 // If this is darwin or another generic macho target, reserve space for the
2071 Triple TT(M->getTargetTriple());
2072 if (TT.isOSDarwin())
2073 Buffer.insert(Buffer.begin(), DarwinBCHeaderSize, 0);
2075 // Emit the module into the buffer.
2077 BitstreamWriter Stream(Buffer);
2079 // Emit the file header.
2080 Stream.Emit((unsigned)'B', 8);
2081 Stream.Emit((unsigned)'C', 8);
2082 Stream.Emit(0x0, 4);
2083 Stream.Emit(0xC, 4);
2084 Stream.Emit(0xE, 4);
2085 Stream.Emit(0xD, 4);
2088 WriteModule(M, Stream);
2091 if (TT.isOSDarwin())
2092 EmitDarwinBCHeaderAndTrailer(Buffer, TT);
2094 // Write the generated bitstream to "Out".
2095 Out.write((char*)&Buffer.front(), Buffer.size());