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 "llvm/Bitcode/BitstreamWriter.h"
16 #include "llvm/Bitcode/LLVMBitCodes.h"
17 #include "ValueEnumerator.h"
18 #include "llvm/Constants.h"
19 #include "llvm/DerivedTypes.h"
20 #include "llvm/InlineAsm.h"
21 #include "llvm/Instructions.h"
22 #include "llvm/Metadata.h"
23 #include "llvm/Module.h"
24 #include "llvm/Operator.h"
25 #include "llvm/TypeSymbolTable.h"
26 #include "llvm/ValueSymbolTable.h"
27 #include "llvm/Support/ErrorHandling.h"
28 #include "llvm/Support/MathExtras.h"
29 #include "llvm/Support/raw_ostream.h"
30 #include "llvm/System/Program.h"
33 /// These are manifest constants used by the bitcode writer. They do not need to
34 /// be kept in sync with the reader, but need to be consistent within this file.
38 // VALUE_SYMTAB_BLOCK abbrev id's.
39 VST_ENTRY_8_ABBREV = bitc::FIRST_APPLICATION_ABBREV,
44 // CONSTANTS_BLOCK abbrev id's.
45 CONSTANTS_SETTYPE_ABBREV = bitc::FIRST_APPLICATION_ABBREV,
46 CONSTANTS_INTEGER_ABBREV,
47 CONSTANTS_CE_CAST_Abbrev,
48 CONSTANTS_NULL_Abbrev,
50 // FUNCTION_BLOCK abbrev id's.
51 FUNCTION_INST_LOAD_ABBREV = bitc::FIRST_APPLICATION_ABBREV,
52 FUNCTION_INST_BINOP_ABBREV,
53 FUNCTION_INST_BINOP_FLAGS_ABBREV,
54 FUNCTION_INST_CAST_ABBREV,
55 FUNCTION_INST_RET_VOID_ABBREV,
56 FUNCTION_INST_RET_VAL_ABBREV,
57 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;
79 static unsigned GetEncodedBinaryOpcode(unsigned Opcode) {
81 default: llvm_unreachable("Unknown binary instruction!");
82 case Instruction::Add:
83 case Instruction::FAdd: return bitc::BINOP_ADD;
84 case Instruction::Sub:
85 case Instruction::FSub: return bitc::BINOP_SUB;
86 case Instruction::Mul:
87 case Instruction::FMul: return bitc::BINOP_MUL;
88 case Instruction::UDiv: return bitc::BINOP_UDIV;
89 case Instruction::FDiv:
90 case Instruction::SDiv: return bitc::BINOP_SDIV;
91 case Instruction::URem: return bitc::BINOP_UREM;
92 case Instruction::FRem:
93 case Instruction::SRem: return bitc::BINOP_SREM;
94 case Instruction::Shl: return bitc::BINOP_SHL;
95 case Instruction::LShr: return bitc::BINOP_LSHR;
96 case Instruction::AShr: return bitc::BINOP_ASHR;
97 case Instruction::And: return bitc::BINOP_AND;
98 case Instruction::Or: return bitc::BINOP_OR;
99 case Instruction::Xor: return bitc::BINOP_XOR;
105 static void WriteStringRecord(unsigned Code, const std::string &Str,
106 unsigned AbbrevToUse, BitstreamWriter &Stream) {
107 SmallVector<unsigned, 64> Vals;
109 // Code: [strchar x N]
110 for (unsigned i = 0, e = Str.size(); i != e; ++i)
111 Vals.push_back(Str[i]);
113 // Emit the finished record.
114 Stream.EmitRecord(Code, Vals, AbbrevToUse);
117 // Emit information about parameter attributes.
118 static void WriteAttributeTable(const ValueEnumerator &VE,
119 BitstreamWriter &Stream) {
120 const std::vector<AttrListPtr> &Attrs = VE.getAttributes();
121 if (Attrs.empty()) return;
123 Stream.EnterSubblock(bitc::PARAMATTR_BLOCK_ID, 3);
125 SmallVector<uint64_t, 64> Record;
126 for (unsigned i = 0, e = Attrs.size(); i != e; ++i) {
127 const AttrListPtr &A = Attrs[i];
128 for (unsigned i = 0, e = A.getNumSlots(); i != e; ++i) {
129 const AttributeWithIndex &PAWI = A.getSlot(i);
130 Record.push_back(PAWI.Index);
132 // FIXME: remove in LLVM 3.0
133 // Store the alignment in the bitcode as a 16-bit raw value instead of a
134 // 5-bit log2 encoded value. Shift the bits above the alignment up by
136 uint64_t FauxAttr = PAWI.Attrs & 0xffff;
137 if (PAWI.Attrs & Attribute::Alignment)
138 FauxAttr |= (1ull<<16)<<(((PAWI.Attrs & Attribute::Alignment)-1) >> 16);
139 FauxAttr |= (PAWI.Attrs & (0x3FFull << 21)) << 11;
141 Record.push_back(FauxAttr);
144 Stream.EmitRecord(bitc::PARAMATTR_CODE_ENTRY, Record);
151 /// WriteTypeTable - Write out the type table for a module.
152 static void WriteTypeTable(const ValueEnumerator &VE, BitstreamWriter &Stream) {
153 const ValueEnumerator::TypeList &TypeList = VE.getTypes();
155 Stream.EnterSubblock(bitc::TYPE_BLOCK_ID, 4 /*count from # abbrevs */);
156 SmallVector<uint64_t, 64> TypeVals;
158 // Abbrev for TYPE_CODE_POINTER.
159 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
160 Abbv->Add(BitCodeAbbrevOp(bitc::TYPE_CODE_POINTER));
161 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed,
162 Log2_32_Ceil(VE.getTypes().size()+1)));
163 Abbv->Add(BitCodeAbbrevOp(0)); // Addrspace = 0
164 unsigned PtrAbbrev = Stream.EmitAbbrev(Abbv);
166 // Abbrev for TYPE_CODE_FUNCTION.
167 Abbv = new BitCodeAbbrev();
168 Abbv->Add(BitCodeAbbrevOp(bitc::TYPE_CODE_FUNCTION));
169 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // isvararg
170 Abbv->Add(BitCodeAbbrevOp(0)); // FIXME: DEAD value, remove in LLVM 3.0
171 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
172 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed,
173 Log2_32_Ceil(VE.getTypes().size()+1)));
174 unsigned FunctionAbbrev = Stream.EmitAbbrev(Abbv);
176 // Abbrev for TYPE_CODE_STRUCT.
177 Abbv = new BitCodeAbbrev();
178 Abbv->Add(BitCodeAbbrevOp(bitc::TYPE_CODE_STRUCT));
179 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // ispacked
180 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
181 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed,
182 Log2_32_Ceil(VE.getTypes().size()+1)));
183 unsigned StructAbbrev = Stream.EmitAbbrev(Abbv);
185 // Abbrev for TYPE_CODE_ARRAY.
186 Abbv = new BitCodeAbbrev();
187 Abbv->Add(BitCodeAbbrevOp(bitc::TYPE_CODE_ARRAY));
188 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8)); // size
189 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed,
190 Log2_32_Ceil(VE.getTypes().size()+1)));
191 unsigned ArrayAbbrev = Stream.EmitAbbrev(Abbv);
193 // Emit an entry count so the reader can reserve space.
194 TypeVals.push_back(TypeList.size());
195 Stream.EmitRecord(bitc::TYPE_CODE_NUMENTRY, TypeVals);
198 // Loop over all of the types, emitting each in turn.
199 for (unsigned i = 0, e = TypeList.size(); i != e; ++i) {
200 const Type *T = TypeList[i].first;
204 switch (T->getTypeID()) {
205 default: llvm_unreachable("Unknown type!");
206 case Type::VoidTyID: Code = bitc::TYPE_CODE_VOID; break;
207 case Type::FloatTyID: Code = bitc::TYPE_CODE_FLOAT; break;
208 case Type::DoubleTyID: Code = bitc::TYPE_CODE_DOUBLE; break;
209 case Type::X86_FP80TyID: Code = bitc::TYPE_CODE_X86_FP80; break;
210 case Type::FP128TyID: Code = bitc::TYPE_CODE_FP128; break;
211 case Type::PPC_FP128TyID: Code = bitc::TYPE_CODE_PPC_FP128; break;
212 case Type::LabelTyID: Code = bitc::TYPE_CODE_LABEL; break;
213 case Type::OpaqueTyID: Code = bitc::TYPE_CODE_OPAQUE; break;
214 case Type::MetadataTyID: Code = bitc::TYPE_CODE_METADATA; break;
215 case Type::IntegerTyID:
217 Code = bitc::TYPE_CODE_INTEGER;
218 TypeVals.push_back(cast<IntegerType>(T)->getBitWidth());
220 case Type::PointerTyID: {
221 const PointerType *PTy = cast<PointerType>(T);
222 // POINTER: [pointee type, address space]
223 Code = bitc::TYPE_CODE_POINTER;
224 TypeVals.push_back(VE.getTypeID(PTy->getElementType()));
225 unsigned AddressSpace = PTy->getAddressSpace();
226 TypeVals.push_back(AddressSpace);
227 if (AddressSpace == 0) AbbrevToUse = PtrAbbrev;
230 case Type::FunctionTyID: {
231 const FunctionType *FT = cast<FunctionType>(T);
232 // FUNCTION: [isvararg, attrid, retty, paramty x N]
233 Code = bitc::TYPE_CODE_FUNCTION;
234 TypeVals.push_back(FT->isVarArg());
235 TypeVals.push_back(0); // FIXME: DEAD: remove in llvm 3.0
236 TypeVals.push_back(VE.getTypeID(FT->getReturnType()));
237 for (unsigned i = 0, e = FT->getNumParams(); i != e; ++i)
238 TypeVals.push_back(VE.getTypeID(FT->getParamType(i)));
239 AbbrevToUse = FunctionAbbrev;
242 case Type::StructTyID: {
243 const StructType *ST = cast<StructType>(T);
244 // STRUCT: [ispacked, eltty x N]
245 Code = bitc::TYPE_CODE_STRUCT;
246 TypeVals.push_back(ST->isPacked());
247 // Output all of the element types.
248 for (StructType::element_iterator I = ST->element_begin(),
249 E = ST->element_end(); I != E; ++I)
250 TypeVals.push_back(VE.getTypeID(*I));
251 AbbrevToUse = StructAbbrev;
254 case Type::ArrayTyID: {
255 const ArrayType *AT = cast<ArrayType>(T);
256 // ARRAY: [numelts, eltty]
257 Code = bitc::TYPE_CODE_ARRAY;
258 TypeVals.push_back(AT->getNumElements());
259 TypeVals.push_back(VE.getTypeID(AT->getElementType()));
260 AbbrevToUse = ArrayAbbrev;
263 case Type::VectorTyID: {
264 const VectorType *VT = cast<VectorType>(T);
265 // VECTOR [numelts, eltty]
266 Code = bitc::TYPE_CODE_VECTOR;
267 TypeVals.push_back(VT->getNumElements());
268 TypeVals.push_back(VE.getTypeID(VT->getElementType()));
273 // Emit the finished record.
274 Stream.EmitRecord(Code, TypeVals, AbbrevToUse);
281 static unsigned getEncodedLinkage(const GlobalValue *GV) {
282 switch (GV->getLinkage()) {
283 default: llvm_unreachable("Invalid linkage!");
284 case GlobalValue::GhostLinkage: // Map ghost linkage onto external.
285 case GlobalValue::ExternalLinkage: return 0;
286 case GlobalValue::WeakAnyLinkage: return 1;
287 case GlobalValue::AppendingLinkage: return 2;
288 case GlobalValue::InternalLinkage: return 3;
289 case GlobalValue::LinkOnceAnyLinkage: return 4;
290 case GlobalValue::DLLImportLinkage: return 5;
291 case GlobalValue::DLLExportLinkage: return 6;
292 case GlobalValue::ExternalWeakLinkage: return 7;
293 case GlobalValue::CommonLinkage: return 8;
294 case GlobalValue::PrivateLinkage: return 9;
295 case GlobalValue::WeakODRLinkage: return 10;
296 case GlobalValue::LinkOnceODRLinkage: return 11;
297 case GlobalValue::AvailableExternallyLinkage: return 12;
298 case GlobalValue::LinkerPrivateLinkage: return 13;
302 static unsigned getEncodedVisibility(const GlobalValue *GV) {
303 switch (GV->getVisibility()) {
304 default: llvm_unreachable("Invalid visibility!");
305 case GlobalValue::DefaultVisibility: return 0;
306 case GlobalValue::HiddenVisibility: return 1;
307 case GlobalValue::ProtectedVisibility: return 2;
311 // Emit top-level description of module, including target triple, inline asm,
312 // descriptors for global variables, and function prototype info.
313 static void WriteModuleInfo(const Module *M, const ValueEnumerator &VE,
314 BitstreamWriter &Stream) {
315 // Emit the list of dependent libraries for the Module.
316 for (Module::lib_iterator I = M->lib_begin(), E = M->lib_end(); I != E; ++I)
317 WriteStringRecord(bitc::MODULE_CODE_DEPLIB, *I, 0/*TODO*/, Stream);
319 // Emit various pieces of data attached to a module.
320 if (!M->getTargetTriple().empty())
321 WriteStringRecord(bitc::MODULE_CODE_TRIPLE, M->getTargetTriple(),
323 if (!M->getDataLayout().empty())
324 WriteStringRecord(bitc::MODULE_CODE_DATALAYOUT, M->getDataLayout(),
326 if (!M->getModuleInlineAsm().empty())
327 WriteStringRecord(bitc::MODULE_CODE_ASM, M->getModuleInlineAsm(),
330 // Emit information about sections and GC, computing how many there are. Also
331 // compute the maximum alignment value.
332 std::map<std::string, unsigned> SectionMap;
333 std::map<std::string, unsigned> GCMap;
334 unsigned MaxAlignment = 0;
335 unsigned MaxGlobalType = 0;
336 for (Module::const_global_iterator GV = M->global_begin(),E = M->global_end();
338 MaxAlignment = std::max(MaxAlignment, GV->getAlignment());
339 MaxGlobalType = std::max(MaxGlobalType, VE.getTypeID(GV->getType()));
341 if (!GV->hasSection()) continue;
342 // Give section names unique ID's.
343 unsigned &Entry = SectionMap[GV->getSection()];
344 if (Entry != 0) continue;
345 WriteStringRecord(bitc::MODULE_CODE_SECTIONNAME, GV->getSection(),
347 Entry = SectionMap.size();
349 for (Module::const_iterator F = M->begin(), E = M->end(); F != E; ++F) {
350 MaxAlignment = std::max(MaxAlignment, F->getAlignment());
351 if (F->hasSection()) {
352 // Give section names unique ID's.
353 unsigned &Entry = SectionMap[F->getSection()];
355 WriteStringRecord(bitc::MODULE_CODE_SECTIONNAME, F->getSection(),
357 Entry = SectionMap.size();
361 // Same for GC names.
362 unsigned &Entry = GCMap[F->getGC()];
364 WriteStringRecord(bitc::MODULE_CODE_GCNAME, F->getGC(),
366 Entry = GCMap.size();
371 // Emit abbrev for globals, now that we know # sections and max alignment.
372 unsigned SimpleGVarAbbrev = 0;
373 if (!M->global_empty()) {
374 // Add an abbrev for common globals with no visibility or thread localness.
375 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
376 Abbv->Add(BitCodeAbbrevOp(bitc::MODULE_CODE_GLOBALVAR));
377 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed,
378 Log2_32_Ceil(MaxGlobalType+1)));
379 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // Constant.
380 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Initializer.
381 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 4)); // Linkage.
382 if (MaxAlignment == 0) // Alignment.
383 Abbv->Add(BitCodeAbbrevOp(0));
385 unsigned MaxEncAlignment = Log2_32(MaxAlignment)+1;
386 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed,
387 Log2_32_Ceil(MaxEncAlignment+1)));
389 if (SectionMap.empty()) // Section.
390 Abbv->Add(BitCodeAbbrevOp(0));
392 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed,
393 Log2_32_Ceil(SectionMap.size()+1)));
394 // Don't bother emitting vis + thread local.
395 SimpleGVarAbbrev = Stream.EmitAbbrev(Abbv);
398 // Emit the global variable information.
399 SmallVector<unsigned, 64> Vals;
400 for (Module::const_global_iterator GV = M->global_begin(),E = M->global_end();
402 unsigned AbbrevToUse = 0;
404 // GLOBALVAR: [type, isconst, initid,
405 // linkage, alignment, section, visibility, threadlocal]
406 Vals.push_back(VE.getTypeID(GV->getType()));
407 Vals.push_back(GV->isConstant());
408 Vals.push_back(GV->isDeclaration() ? 0 :
409 (VE.getValueID(GV->getInitializer()) + 1));
410 Vals.push_back(getEncodedLinkage(GV));
411 Vals.push_back(Log2_32(GV->getAlignment())+1);
412 Vals.push_back(GV->hasSection() ? SectionMap[GV->getSection()] : 0);
413 if (GV->isThreadLocal() ||
414 GV->getVisibility() != GlobalValue::DefaultVisibility) {
415 Vals.push_back(getEncodedVisibility(GV));
416 Vals.push_back(GV->isThreadLocal());
418 AbbrevToUse = SimpleGVarAbbrev;
421 Stream.EmitRecord(bitc::MODULE_CODE_GLOBALVAR, Vals, AbbrevToUse);
425 // Emit the function proto information.
426 for (Module::const_iterator F = M->begin(), E = M->end(); F != E; ++F) {
427 // FUNCTION: [type, callingconv, isproto, paramattr,
428 // linkage, alignment, section, visibility, gc]
429 Vals.push_back(VE.getTypeID(F->getType()));
430 Vals.push_back(F->getCallingConv());
431 Vals.push_back(F->isDeclaration());
432 Vals.push_back(getEncodedLinkage(F));
433 Vals.push_back(VE.getAttributeID(F->getAttributes()));
434 Vals.push_back(Log2_32(F->getAlignment())+1);
435 Vals.push_back(F->hasSection() ? SectionMap[F->getSection()] : 0);
436 Vals.push_back(getEncodedVisibility(F));
437 Vals.push_back(F->hasGC() ? GCMap[F->getGC()] : 0);
439 unsigned AbbrevToUse = 0;
440 Stream.EmitRecord(bitc::MODULE_CODE_FUNCTION, Vals, AbbrevToUse);
445 // Emit the alias information.
446 for (Module::const_alias_iterator AI = M->alias_begin(), E = M->alias_end();
448 Vals.push_back(VE.getTypeID(AI->getType()));
449 Vals.push_back(VE.getValueID(AI->getAliasee()));
450 Vals.push_back(getEncodedLinkage(AI));
451 Vals.push_back(getEncodedVisibility(AI));
452 unsigned AbbrevToUse = 0;
453 Stream.EmitRecord(bitc::MODULE_CODE_ALIAS, Vals, AbbrevToUse);
458 static uint64_t GetOptimizationFlags(const Value *V) {
461 if (const OverflowingBinaryOperator *OBO =
462 dyn_cast<OverflowingBinaryOperator>(V)) {
463 if (OBO->hasNoSignedWrap())
464 Flags |= 1 << bitc::OBO_NO_SIGNED_WRAP;
465 if (OBO->hasNoUnsignedWrap())
466 Flags |= 1 << bitc::OBO_NO_UNSIGNED_WRAP;
467 } else if (const SDivOperator *Div = dyn_cast<SDivOperator>(V)) {
469 Flags |= 1 << bitc::SDIV_EXACT;
475 static void WriteMDNode(const MDNode *N,
476 const ValueEnumerator &VE,
477 BitstreamWriter &Stream,
478 SmallVector<uint64_t, 64> &Record) {
479 for (unsigned i = 0, e = N->getNumElements(); i != e; ++i) {
480 if (N->getElement(i)) {
481 Record.push_back(VE.getTypeID(N->getElement(i)->getType()));
482 Record.push_back(VE.getValueID(N->getElement(i)));
484 Record.push_back(VE.getTypeID(Type::getVoidTy(N->getContext())));
488 Stream.EmitRecord(bitc::METADATA_NODE, Record, 0);
492 static void WriteModuleMetadata(const ValueEnumerator &VE,
493 BitstreamWriter &Stream) {
494 const ValueEnumerator::ValueList &Vals = VE.getMDValues();
495 bool StartedMetadataBlock = false;
496 unsigned MDSAbbrev = 0;
497 SmallVector<uint64_t, 64> Record;
498 for (unsigned i = 0, e = Vals.size(); i != e; ++i) {
500 if (const MDNode *N = dyn_cast<MDNode>(Vals[i].first)) {
501 if (!StartedMetadataBlock) {
502 Stream.EnterSubblock(bitc::METADATA_BLOCK_ID, 3);
503 StartedMetadataBlock = true;
505 WriteMDNode(N, VE, Stream, Record);
506 } else if (const MDString *MDS = dyn_cast<MDString>(Vals[i].first)) {
507 if (!StartedMetadataBlock) {
508 Stream.EnterSubblock(bitc::METADATA_BLOCK_ID, 3);
510 // Abbrev for METADATA_STRING.
511 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
512 Abbv->Add(BitCodeAbbrevOp(bitc::METADATA_STRING));
513 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
514 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 8));
515 MDSAbbrev = Stream.EmitAbbrev(Abbv);
516 StartedMetadataBlock = true;
519 // Code: [strchar x N]
520 const char *StrBegin = MDS->begin();
521 for (unsigned i = 0, e = MDS->length(); i != e; ++i)
522 Record.push_back(StrBegin[i]);
524 // Emit the finished record.
525 Stream.EmitRecord(bitc::METADATA_STRING, Record, MDSAbbrev);
527 } else if (const NamedMDNode *NMD = dyn_cast<NamedMDNode>(Vals[i].first)) {
528 if (!StartedMetadataBlock) {
529 Stream.EnterSubblock(bitc::METADATA_BLOCK_ID, 3);
530 StartedMetadataBlock = true;
534 std::string Str = NMD->getNameStr();
535 const char *StrBegin = Str.c_str();
536 for (unsigned i = 0, e = Str.length(); i != e; ++i)
537 Record.push_back(StrBegin[i]);
538 Stream.EmitRecord(bitc::METADATA_NAME, Record, 0/*TODO*/);
541 // Write named metadata elements.
542 for (unsigned i = 0, e = NMD->getNumElements(); i != e; ++i) {
543 if (NMD->getElement(i))
544 Record.push_back(VE.getValueID(NMD->getElement(i)));
548 Stream.EmitRecord(bitc::METADATA_NAMED_NODE, Record, 0);
553 if (StartedMetadataBlock)
557 static void WriteMetadataAttachment(const Function &F,
558 const ValueEnumerator &VE,
559 BitstreamWriter &Stream) {
560 bool StartedMetadataBlock = false;
561 SmallVector<uint64_t, 64> Record;
563 // Write metadata attachments
564 // METADATA_ATTACHMENT - [m x [value, [n x [id, mdnode]]]
565 Metadata &TheMetadata = F.getContext().getMetadata();
566 for (Function::const_iterator BB = F.begin(), E = F.end(); BB != E; ++BB)
567 for (BasicBlock::const_iterator I = BB->begin(), E = BB->end();
569 const Metadata::MDMapTy *P = TheMetadata.getMDs(I);
571 bool RecordedInstruction = false;
572 for (Metadata::MDMapTy::const_iterator PI = P->begin(), PE = P->end();
574 if (MDNode *ND = dyn_cast_or_null<MDNode>(PI->second)) {
575 if (RecordedInstruction == false) {
576 Record.push_back(VE.getInstructionID(I));
577 RecordedInstruction = true;
579 Record.push_back(PI->first);
580 Record.push_back(VE.getValueID(ND));
583 if (!StartedMetadataBlock) {
584 Stream.EnterSubblock(bitc::METADATA_ATTACHMENT_ID, 3);
585 StartedMetadataBlock = true;
587 Stream.EmitRecord(bitc::METADATA_ATTACHMENT, Record, 0);
591 if (StartedMetadataBlock)
595 static void WriteModuleMetadataStore(const Module *M,
596 const ValueEnumerator &VE,
597 BitstreamWriter &Stream) {
599 bool StartedMetadataBlock = false;
600 SmallVector<uint64_t, 64> Record;
602 // Write metadata kinds
603 // METADATA_KIND - [n x [id, name]]
604 Metadata &TheMetadata = M->getContext().getMetadata();
605 const StringMap<unsigned> *Kinds = TheMetadata.getHandlerNames();
606 for (StringMap<unsigned>::const_iterator
607 I = Kinds->begin(), E = Kinds->end(); I != E; ++I) {
608 Record.push_back(I->second);
609 StringRef KName = I->first();
610 for (unsigned i = 0, e = KName.size(); i != e; ++i)
611 Record.push_back(KName[i]);
612 if (!StartedMetadataBlock) {
613 Stream.EnterSubblock(bitc::METADATA_BLOCK_ID, 3);
614 StartedMetadataBlock = true;
616 Stream.EmitRecord(bitc::METADATA_KIND, Record, 0);
620 if (StartedMetadataBlock)
624 static void WriteConstants(unsigned FirstVal, unsigned LastVal,
625 const ValueEnumerator &VE,
626 BitstreamWriter &Stream, bool isGlobal) {
627 if (FirstVal == LastVal) return;
629 Stream.EnterSubblock(bitc::CONSTANTS_BLOCK_ID, 4);
631 unsigned AggregateAbbrev = 0;
632 unsigned String8Abbrev = 0;
633 unsigned CString7Abbrev = 0;
634 unsigned CString6Abbrev = 0;
635 // If this is a constant pool for the module, emit module-specific abbrevs.
637 // Abbrev for CST_CODE_AGGREGATE.
638 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
639 Abbv->Add(BitCodeAbbrevOp(bitc::CST_CODE_AGGREGATE));
640 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
641 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, Log2_32_Ceil(LastVal+1)));
642 AggregateAbbrev = Stream.EmitAbbrev(Abbv);
644 // Abbrev for CST_CODE_STRING.
645 Abbv = new BitCodeAbbrev();
646 Abbv->Add(BitCodeAbbrevOp(bitc::CST_CODE_STRING));
647 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
648 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 8));
649 String8Abbrev = Stream.EmitAbbrev(Abbv);
650 // Abbrev for CST_CODE_CSTRING.
651 Abbv = new BitCodeAbbrev();
652 Abbv->Add(BitCodeAbbrevOp(bitc::CST_CODE_CSTRING));
653 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
654 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 7));
655 CString7Abbrev = Stream.EmitAbbrev(Abbv);
656 // Abbrev for CST_CODE_CSTRING.
657 Abbv = new BitCodeAbbrev();
658 Abbv->Add(BitCodeAbbrevOp(bitc::CST_CODE_CSTRING));
659 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
660 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Char6));
661 CString6Abbrev = Stream.EmitAbbrev(Abbv);
664 SmallVector<uint64_t, 64> Record;
666 const ValueEnumerator::ValueList &Vals = VE.getValues();
667 const Type *LastTy = 0;
668 for (unsigned i = FirstVal; i != LastVal; ++i) {
669 const Value *V = Vals[i].first;
670 // If we need to switch types, do so now.
671 if (V->getType() != LastTy) {
672 LastTy = V->getType();
673 Record.push_back(VE.getTypeID(LastTy));
674 Stream.EmitRecord(bitc::CST_CODE_SETTYPE, Record,
675 CONSTANTS_SETTYPE_ABBREV);
679 if (const InlineAsm *IA = dyn_cast<InlineAsm>(V)) {
680 Record.push_back(unsigned(IA->hasSideEffects()));
682 // Add the asm string.
683 const std::string &AsmStr = IA->getAsmString();
684 Record.push_back(AsmStr.size());
685 for (unsigned i = 0, e = AsmStr.size(); i != e; ++i)
686 Record.push_back(AsmStr[i]);
688 // Add the constraint string.
689 const std::string &ConstraintStr = IA->getConstraintString();
690 Record.push_back(ConstraintStr.size());
691 for (unsigned i = 0, e = ConstraintStr.size(); i != e; ++i)
692 Record.push_back(ConstraintStr[i]);
693 Stream.EmitRecord(bitc::CST_CODE_INLINEASM, Record);
697 const Constant *C = cast<Constant>(V);
699 unsigned AbbrevToUse = 0;
700 if (C->isNullValue()) {
701 Code = bitc::CST_CODE_NULL;
702 } else if (isa<UndefValue>(C)) {
703 Code = bitc::CST_CODE_UNDEF;
704 } else if (const ConstantInt *IV = dyn_cast<ConstantInt>(C)) {
705 if (IV->getBitWidth() <= 64) {
706 int64_t V = IV->getSExtValue();
708 Record.push_back(V << 1);
710 Record.push_back((-V << 1) | 1);
711 Code = bitc::CST_CODE_INTEGER;
712 AbbrevToUse = CONSTANTS_INTEGER_ABBREV;
713 } else { // Wide integers, > 64 bits in size.
714 // We have an arbitrary precision integer value to write whose
715 // bit width is > 64. However, in canonical unsigned integer
716 // format it is likely that the high bits are going to be zero.
717 // So, we only write the number of active words.
718 unsigned NWords = IV->getValue().getActiveWords();
719 const uint64_t *RawWords = IV->getValue().getRawData();
720 for (unsigned i = 0; i != NWords; ++i) {
721 int64_t V = RawWords[i];
723 Record.push_back(V << 1);
725 Record.push_back((-V << 1) | 1);
727 Code = bitc::CST_CODE_WIDE_INTEGER;
729 } else if (const ConstantFP *CFP = dyn_cast<ConstantFP>(C)) {
730 Code = bitc::CST_CODE_FLOAT;
731 const Type *Ty = CFP->getType();
732 if (Ty == Type::getFloatTy(Ty->getContext()) ||
733 Ty == Type::getDoubleTy(Ty->getContext())) {
734 Record.push_back(CFP->getValueAPF().bitcastToAPInt().getZExtValue());
735 } else if (Ty == Type::getX86_FP80Ty(Ty->getContext())) {
736 // api needed to prevent premature destruction
737 // bits are not in the same order as a normal i80 APInt, compensate.
738 APInt api = CFP->getValueAPF().bitcastToAPInt();
739 const uint64_t *p = api.getRawData();
740 Record.push_back((p[1] << 48) | (p[0] >> 16));
741 Record.push_back(p[0] & 0xffffLL);
742 } else if (Ty == Type::getFP128Ty(Ty->getContext()) ||
743 Ty == Type::getPPC_FP128Ty(Ty->getContext())) {
744 APInt api = CFP->getValueAPF().bitcastToAPInt();
745 const uint64_t *p = api.getRawData();
746 Record.push_back(p[0]);
747 Record.push_back(p[1]);
749 assert (0 && "Unknown FP type!");
751 } else if (isa<ConstantArray>(C) && cast<ConstantArray>(C)->isString()) {
752 // Emit constant strings specially.
753 unsigned NumOps = C->getNumOperands();
754 // If this is a null-terminated string, use the denser CSTRING encoding.
755 if (C->getOperand(NumOps-1)->isNullValue()) {
756 Code = bitc::CST_CODE_CSTRING;
757 --NumOps; // Don't encode the null, which isn't allowed by char6.
759 Code = bitc::CST_CODE_STRING;
760 AbbrevToUse = String8Abbrev;
762 bool isCStr7 = Code == bitc::CST_CODE_CSTRING;
763 bool isCStrChar6 = Code == bitc::CST_CODE_CSTRING;
764 for (unsigned i = 0; i != NumOps; ++i) {
765 unsigned char V = cast<ConstantInt>(C->getOperand(i))->getZExtValue();
767 isCStr7 &= (V & 128) == 0;
769 isCStrChar6 = BitCodeAbbrevOp::isChar6(V);
773 AbbrevToUse = CString6Abbrev;
775 AbbrevToUse = CString7Abbrev;
776 } else if (isa<ConstantArray>(C) || isa<ConstantStruct>(V) ||
777 isa<ConstantVector>(V)) {
778 Code = bitc::CST_CODE_AGGREGATE;
779 for (unsigned i = 0, e = C->getNumOperands(); i != e; ++i)
780 Record.push_back(VE.getValueID(C->getOperand(i)));
781 AbbrevToUse = AggregateAbbrev;
782 } else if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(C)) {
783 switch (CE->getOpcode()) {
785 if (Instruction::isCast(CE->getOpcode())) {
786 Code = bitc::CST_CODE_CE_CAST;
787 Record.push_back(GetEncodedCastOpcode(CE->getOpcode()));
788 Record.push_back(VE.getTypeID(C->getOperand(0)->getType()));
789 Record.push_back(VE.getValueID(C->getOperand(0)));
790 AbbrevToUse = CONSTANTS_CE_CAST_Abbrev;
792 assert(CE->getNumOperands() == 2 && "Unknown constant expr!");
793 Code = bitc::CST_CODE_CE_BINOP;
794 Record.push_back(GetEncodedBinaryOpcode(CE->getOpcode()));
795 Record.push_back(VE.getValueID(C->getOperand(0)));
796 Record.push_back(VE.getValueID(C->getOperand(1)));
797 uint64_t Flags = GetOptimizationFlags(CE);
799 Record.push_back(Flags);
802 case Instruction::GetElementPtr:
803 Code = bitc::CST_CODE_CE_GEP;
804 if (cast<GEPOperator>(C)->isInBounds())
805 Code = bitc::CST_CODE_CE_INBOUNDS_GEP;
806 for (unsigned i = 0, e = CE->getNumOperands(); i != e; ++i) {
807 Record.push_back(VE.getTypeID(C->getOperand(i)->getType()));
808 Record.push_back(VE.getValueID(C->getOperand(i)));
811 case Instruction::Select:
812 Code = bitc::CST_CODE_CE_SELECT;
813 Record.push_back(VE.getValueID(C->getOperand(0)));
814 Record.push_back(VE.getValueID(C->getOperand(1)));
815 Record.push_back(VE.getValueID(C->getOperand(2)));
817 case Instruction::ExtractElement:
818 Code = bitc::CST_CODE_CE_EXTRACTELT;
819 Record.push_back(VE.getTypeID(C->getOperand(0)->getType()));
820 Record.push_back(VE.getValueID(C->getOperand(0)));
821 Record.push_back(VE.getValueID(C->getOperand(1)));
823 case Instruction::InsertElement:
824 Code = bitc::CST_CODE_CE_INSERTELT;
825 Record.push_back(VE.getValueID(C->getOperand(0)));
826 Record.push_back(VE.getValueID(C->getOperand(1)));
827 Record.push_back(VE.getValueID(C->getOperand(2)));
829 case Instruction::ShuffleVector:
830 // If the return type and argument types are the same, this is a
831 // standard shufflevector instruction. If the types are different,
832 // then the shuffle is widening or truncating the input vectors, and
833 // the argument type must also be encoded.
834 if (C->getType() == C->getOperand(0)->getType()) {
835 Code = bitc::CST_CODE_CE_SHUFFLEVEC;
837 Code = bitc::CST_CODE_CE_SHUFVEC_EX;
838 Record.push_back(VE.getTypeID(C->getOperand(0)->getType()));
840 Record.push_back(VE.getValueID(C->getOperand(0)));
841 Record.push_back(VE.getValueID(C->getOperand(1)));
842 Record.push_back(VE.getValueID(C->getOperand(2)));
844 case Instruction::ICmp:
845 case Instruction::FCmp:
846 Code = bitc::CST_CODE_CE_CMP;
847 Record.push_back(VE.getTypeID(C->getOperand(0)->getType()));
848 Record.push_back(VE.getValueID(C->getOperand(0)));
849 Record.push_back(VE.getValueID(C->getOperand(1)));
850 Record.push_back(CE->getPredicate());
854 llvm_unreachable("Unknown constant!");
856 Stream.EmitRecord(Code, Record, AbbrevToUse);
863 static void WriteModuleConstants(const ValueEnumerator &VE,
864 BitstreamWriter &Stream) {
865 const ValueEnumerator::ValueList &Vals = VE.getValues();
867 // Find the first constant to emit, which is the first non-globalvalue value.
868 // We know globalvalues have been emitted by WriteModuleInfo.
869 for (unsigned i = 0, e = Vals.size(); i != e; ++i) {
870 if (!isa<GlobalValue>(Vals[i].first)) {
871 WriteConstants(i, Vals.size(), VE, Stream, true);
877 /// PushValueAndType - The file has to encode both the value and type id for
878 /// many values, because we need to know what type to create for forward
879 /// references. However, most operands are not forward references, so this type
880 /// field is not needed.
882 /// This function adds V's value ID to Vals. If the value ID is higher than the
883 /// instruction ID, then it is a forward reference, and it also includes the
885 static bool PushValueAndType(const Value *V, unsigned InstID,
886 SmallVector<unsigned, 64> &Vals,
887 ValueEnumerator &VE) {
888 unsigned ValID = VE.getValueID(V);
889 Vals.push_back(ValID);
890 if (ValID >= InstID) {
891 Vals.push_back(VE.getTypeID(V->getType()));
897 /// WriteInstruction - Emit an instruction to the specified stream.
898 static void WriteInstruction(const Instruction &I, unsigned InstID,
899 ValueEnumerator &VE, BitstreamWriter &Stream,
900 SmallVector<unsigned, 64> &Vals) {
902 unsigned AbbrevToUse = 0;
903 VE.setInstructionID(&I);
904 switch (I.getOpcode()) {
906 if (Instruction::isCast(I.getOpcode())) {
907 Code = bitc::FUNC_CODE_INST_CAST;
908 if (!PushValueAndType(I.getOperand(0), InstID, Vals, VE))
909 AbbrevToUse = FUNCTION_INST_CAST_ABBREV;
910 Vals.push_back(VE.getTypeID(I.getType()));
911 Vals.push_back(GetEncodedCastOpcode(I.getOpcode()));
913 assert(isa<BinaryOperator>(I) && "Unknown instruction!");
914 Code = bitc::FUNC_CODE_INST_BINOP;
915 if (!PushValueAndType(I.getOperand(0), InstID, Vals, VE))
916 AbbrevToUse = FUNCTION_INST_BINOP_ABBREV;
917 Vals.push_back(VE.getValueID(I.getOperand(1)));
918 Vals.push_back(GetEncodedBinaryOpcode(I.getOpcode()));
919 uint64_t Flags = GetOptimizationFlags(&I);
921 if (AbbrevToUse == FUNCTION_INST_BINOP_ABBREV)
922 AbbrevToUse = FUNCTION_INST_BINOP_FLAGS_ABBREV;
923 Vals.push_back(Flags);
928 case Instruction::GetElementPtr:
929 Code = bitc::FUNC_CODE_INST_GEP;
930 if (cast<GEPOperator>(&I)->isInBounds())
931 Code = bitc::FUNC_CODE_INST_INBOUNDS_GEP;
932 for (unsigned i = 0, e = I.getNumOperands(); i != e; ++i)
933 PushValueAndType(I.getOperand(i), InstID, Vals, VE);
935 case Instruction::ExtractValue: {
936 Code = bitc::FUNC_CODE_INST_EXTRACTVAL;
937 PushValueAndType(I.getOperand(0), InstID, Vals, VE);
938 const ExtractValueInst *EVI = cast<ExtractValueInst>(&I);
939 for (const unsigned *i = EVI->idx_begin(), *e = EVI->idx_end(); i != e; ++i)
943 case Instruction::InsertValue: {
944 Code = bitc::FUNC_CODE_INST_INSERTVAL;
945 PushValueAndType(I.getOperand(0), InstID, Vals, VE);
946 PushValueAndType(I.getOperand(1), InstID, Vals, VE);
947 const InsertValueInst *IVI = cast<InsertValueInst>(&I);
948 for (const unsigned *i = IVI->idx_begin(), *e = IVI->idx_end(); i != e; ++i)
952 case Instruction::Select:
953 Code = bitc::FUNC_CODE_INST_VSELECT;
954 PushValueAndType(I.getOperand(1), InstID, Vals, VE);
955 Vals.push_back(VE.getValueID(I.getOperand(2)));
956 PushValueAndType(I.getOperand(0), InstID, Vals, VE);
958 case Instruction::ExtractElement:
959 Code = bitc::FUNC_CODE_INST_EXTRACTELT;
960 PushValueAndType(I.getOperand(0), InstID, Vals, VE);
961 Vals.push_back(VE.getValueID(I.getOperand(1)));
963 case Instruction::InsertElement:
964 Code = bitc::FUNC_CODE_INST_INSERTELT;
965 PushValueAndType(I.getOperand(0), InstID, Vals, VE);
966 Vals.push_back(VE.getValueID(I.getOperand(1)));
967 Vals.push_back(VE.getValueID(I.getOperand(2)));
969 case Instruction::ShuffleVector:
970 Code = bitc::FUNC_CODE_INST_SHUFFLEVEC;
971 PushValueAndType(I.getOperand(0), InstID, Vals, VE);
972 Vals.push_back(VE.getValueID(I.getOperand(1)));
973 Vals.push_back(VE.getValueID(I.getOperand(2)));
975 case Instruction::ICmp:
976 case Instruction::FCmp:
977 // compare returning Int1Ty or vector of Int1Ty
978 Code = bitc::FUNC_CODE_INST_CMP2;
979 PushValueAndType(I.getOperand(0), InstID, Vals, VE);
980 Vals.push_back(VE.getValueID(I.getOperand(1)));
981 Vals.push_back(cast<CmpInst>(I).getPredicate());
984 case Instruction::Ret:
986 Code = bitc::FUNC_CODE_INST_RET;
987 unsigned NumOperands = I.getNumOperands();
988 if (NumOperands == 0)
989 AbbrevToUse = FUNCTION_INST_RET_VOID_ABBREV;
990 else if (NumOperands == 1) {
991 if (!PushValueAndType(I.getOperand(0), InstID, Vals, VE))
992 AbbrevToUse = FUNCTION_INST_RET_VAL_ABBREV;
994 for (unsigned i = 0, e = NumOperands; i != e; ++i)
995 PushValueAndType(I.getOperand(i), InstID, Vals, VE);
999 case Instruction::Br:
1001 Code = bitc::FUNC_CODE_INST_BR;
1002 BranchInst &II(cast<BranchInst>(I));
1003 Vals.push_back(VE.getValueID(II.getSuccessor(0)));
1004 if (II.isConditional()) {
1005 Vals.push_back(VE.getValueID(II.getSuccessor(1)));
1006 Vals.push_back(VE.getValueID(II.getCondition()));
1010 case Instruction::Switch:
1011 Code = bitc::FUNC_CODE_INST_SWITCH;
1012 Vals.push_back(VE.getTypeID(I.getOperand(0)->getType()));
1013 for (unsigned i = 0, e = I.getNumOperands(); i != e; ++i)
1014 Vals.push_back(VE.getValueID(I.getOperand(i)));
1016 case Instruction::Invoke: {
1017 const InvokeInst *II = cast<InvokeInst>(&I);
1018 const Value *Callee(II->getCalledValue());
1019 const PointerType *PTy = cast<PointerType>(Callee->getType());
1020 const FunctionType *FTy = cast<FunctionType>(PTy->getElementType());
1021 Code = bitc::FUNC_CODE_INST_INVOKE;
1023 Vals.push_back(VE.getAttributeID(II->getAttributes()));
1024 Vals.push_back(II->getCallingConv());
1025 Vals.push_back(VE.getValueID(II->getNormalDest()));
1026 Vals.push_back(VE.getValueID(II->getUnwindDest()));
1027 PushValueAndType(Callee, InstID, Vals, VE);
1029 // Emit value #'s for the fixed parameters.
1030 for (unsigned i = 0, e = FTy->getNumParams(); i != e; ++i)
1031 Vals.push_back(VE.getValueID(I.getOperand(i+3))); // fixed param.
1033 // Emit type/value pairs for varargs params.
1034 if (FTy->isVarArg()) {
1035 for (unsigned i = 3+FTy->getNumParams(), e = I.getNumOperands();
1037 PushValueAndType(I.getOperand(i), InstID, Vals, VE); // vararg
1041 case Instruction::Unwind:
1042 Code = bitc::FUNC_CODE_INST_UNWIND;
1044 case Instruction::Unreachable:
1045 Code = bitc::FUNC_CODE_INST_UNREACHABLE;
1046 AbbrevToUse = FUNCTION_INST_UNREACHABLE_ABBREV;
1049 case Instruction::PHI:
1050 Code = bitc::FUNC_CODE_INST_PHI;
1051 Vals.push_back(VE.getTypeID(I.getType()));
1052 for (unsigned i = 0, e = I.getNumOperands(); i != e; ++i)
1053 Vals.push_back(VE.getValueID(I.getOperand(i)));
1056 case Instruction::Malloc:
1057 Code = bitc::FUNC_CODE_INST_MALLOC;
1058 Vals.push_back(VE.getTypeID(I.getType()));
1059 Vals.push_back(VE.getValueID(I.getOperand(0))); // size.
1060 Vals.push_back(Log2_32(cast<MallocInst>(I).getAlignment())+1);
1063 case Instruction::Free:
1064 Code = bitc::FUNC_CODE_INST_FREE;
1065 PushValueAndType(I.getOperand(0), InstID, Vals, VE);
1068 case Instruction::Alloca:
1069 Code = bitc::FUNC_CODE_INST_ALLOCA;
1070 Vals.push_back(VE.getTypeID(I.getType()));
1071 Vals.push_back(VE.getValueID(I.getOperand(0))); // size.
1072 Vals.push_back(Log2_32(cast<AllocaInst>(I).getAlignment())+1);
1075 case Instruction::Load:
1076 Code = bitc::FUNC_CODE_INST_LOAD;
1077 if (!PushValueAndType(I.getOperand(0), InstID, Vals, VE)) // ptr
1078 AbbrevToUse = FUNCTION_INST_LOAD_ABBREV;
1080 Vals.push_back(Log2_32(cast<LoadInst>(I).getAlignment())+1);
1081 Vals.push_back(cast<LoadInst>(I).isVolatile());
1083 case Instruction::Store:
1084 Code = bitc::FUNC_CODE_INST_STORE2;
1085 PushValueAndType(I.getOperand(1), InstID, Vals, VE); // ptrty + ptr
1086 Vals.push_back(VE.getValueID(I.getOperand(0))); // val.
1087 Vals.push_back(Log2_32(cast<StoreInst>(I).getAlignment())+1);
1088 Vals.push_back(cast<StoreInst>(I).isVolatile());
1090 case Instruction::Call: {
1091 const PointerType *PTy = cast<PointerType>(I.getOperand(0)->getType());
1092 const FunctionType *FTy = cast<FunctionType>(PTy->getElementType());
1094 Code = bitc::FUNC_CODE_INST_CALL;
1096 const CallInst *CI = cast<CallInst>(&I);
1097 Vals.push_back(VE.getAttributeID(CI->getAttributes()));
1098 Vals.push_back((CI->getCallingConv() << 1) | unsigned(CI->isTailCall()));
1099 PushValueAndType(CI->getOperand(0), InstID, Vals, VE); // Callee
1101 // Emit value #'s for the fixed parameters.
1102 for (unsigned i = 0, e = FTy->getNumParams(); i != e; ++i)
1103 Vals.push_back(VE.getValueID(I.getOperand(i+1))); // fixed param.
1105 // Emit type/value pairs for varargs params.
1106 if (FTy->isVarArg()) {
1107 unsigned NumVarargs = I.getNumOperands()-1-FTy->getNumParams();
1108 for (unsigned i = I.getNumOperands()-NumVarargs, e = I.getNumOperands();
1110 PushValueAndType(I.getOperand(i), InstID, Vals, VE); // varargs
1114 case Instruction::VAArg:
1115 Code = bitc::FUNC_CODE_INST_VAARG;
1116 Vals.push_back(VE.getTypeID(I.getOperand(0)->getType())); // valistty
1117 Vals.push_back(VE.getValueID(I.getOperand(0))); // valist.
1118 Vals.push_back(VE.getTypeID(I.getType())); // restype.
1122 Stream.EmitRecord(Code, Vals, AbbrevToUse);
1126 // Emit names for globals/functions etc.
1127 static void WriteValueSymbolTable(const ValueSymbolTable &VST,
1128 const ValueEnumerator &VE,
1129 BitstreamWriter &Stream) {
1130 if (VST.empty()) return;
1131 Stream.EnterSubblock(bitc::VALUE_SYMTAB_BLOCK_ID, 4);
1133 // FIXME: Set up the abbrev, we know how many values there are!
1134 // FIXME: We know if the type names can use 7-bit ascii.
1135 SmallVector<unsigned, 64> NameVals;
1137 for (ValueSymbolTable::const_iterator SI = VST.begin(), SE = VST.end();
1140 const ValueName &Name = *SI;
1142 // Figure out the encoding to use for the name.
1144 bool isChar6 = true;
1145 for (const char *C = Name.getKeyData(), *E = C+Name.getKeyLength();
1148 isChar6 = BitCodeAbbrevOp::isChar6(*C);
1149 if ((unsigned char)*C & 128) {
1151 break; // don't bother scanning the rest.
1155 unsigned AbbrevToUse = VST_ENTRY_8_ABBREV;
1157 // VST_ENTRY: [valueid, namechar x N]
1158 // VST_BBENTRY: [bbid, namechar x N]
1160 if (isa<BasicBlock>(SI->getValue())) {
1161 Code = bitc::VST_CODE_BBENTRY;
1163 AbbrevToUse = VST_BBENTRY_6_ABBREV;
1165 Code = bitc::VST_CODE_ENTRY;
1167 AbbrevToUse = VST_ENTRY_6_ABBREV;
1169 AbbrevToUse = VST_ENTRY_7_ABBREV;
1172 NameVals.push_back(VE.getValueID(SI->getValue()));
1173 for (const char *P = Name.getKeyData(),
1174 *E = Name.getKeyData()+Name.getKeyLength(); P != E; ++P)
1175 NameVals.push_back((unsigned char)*P);
1177 // Emit the finished record.
1178 Stream.EmitRecord(Code, NameVals, AbbrevToUse);
1184 /// WriteFunction - Emit a function body to the module stream.
1185 static void WriteFunction(const Function &F, ValueEnumerator &VE,
1186 BitstreamWriter &Stream) {
1187 Stream.EnterSubblock(bitc::FUNCTION_BLOCK_ID, 4);
1188 VE.incorporateFunction(F);
1190 SmallVector<unsigned, 64> Vals;
1192 // Emit the number of basic blocks, so the reader can create them ahead of
1194 Vals.push_back(VE.getBasicBlocks().size());
1195 Stream.EmitRecord(bitc::FUNC_CODE_DECLAREBLOCKS, Vals);
1198 // If there are function-local constants, emit them now.
1199 unsigned CstStart, CstEnd;
1200 VE.getFunctionConstantRange(CstStart, CstEnd);
1201 WriteConstants(CstStart, CstEnd, VE, Stream, false);
1203 // Keep a running idea of what the instruction ID is.
1204 unsigned InstID = CstEnd;
1206 // Finally, emit all the instructions, in order.
1207 for (Function::const_iterator BB = F.begin(), E = F.end(); BB != E; ++BB)
1208 for (BasicBlock::const_iterator I = BB->begin(), E = BB->end();
1210 WriteInstruction(*I, InstID, VE, Stream, Vals);
1211 if (I->getType() != Type::getVoidTy(F.getContext()))
1215 // Emit names for all the instructions etc.
1216 WriteValueSymbolTable(F.getValueSymbolTable(), VE, Stream);
1218 WriteMetadataAttachment(F, VE, Stream);
1223 /// WriteTypeSymbolTable - Emit a block for the specified type symtab.
1224 static void WriteTypeSymbolTable(const TypeSymbolTable &TST,
1225 const ValueEnumerator &VE,
1226 BitstreamWriter &Stream) {
1227 if (TST.empty()) return;
1229 Stream.EnterSubblock(bitc::TYPE_SYMTAB_BLOCK_ID, 3);
1231 // 7-bit fixed width VST_CODE_ENTRY strings.
1232 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
1233 Abbv->Add(BitCodeAbbrevOp(bitc::VST_CODE_ENTRY));
1234 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed,
1235 Log2_32_Ceil(VE.getTypes().size()+1)));
1236 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
1237 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 7));
1238 unsigned V7Abbrev = Stream.EmitAbbrev(Abbv);
1240 SmallVector<unsigned, 64> NameVals;
1242 for (TypeSymbolTable::const_iterator TI = TST.begin(), TE = TST.end();
1244 // TST_ENTRY: [typeid, namechar x N]
1245 NameVals.push_back(VE.getTypeID(TI->second));
1247 const std::string &Str = TI->first;
1249 for (unsigned i = 0, e = Str.size(); i != e; ++i) {
1250 NameVals.push_back((unsigned char)Str[i]);
1255 // Emit the finished record.
1256 Stream.EmitRecord(bitc::VST_CODE_ENTRY, NameVals, is7Bit ? V7Abbrev : 0);
1263 // Emit blockinfo, which defines the standard abbreviations etc.
1264 static void WriteBlockInfo(const ValueEnumerator &VE, BitstreamWriter &Stream) {
1265 // We only want to emit block info records for blocks that have multiple
1266 // instances: CONSTANTS_BLOCK, FUNCTION_BLOCK and VALUE_SYMTAB_BLOCK. Other
1267 // blocks can defined their abbrevs inline.
1268 Stream.EnterBlockInfoBlock(2);
1270 { // 8-bit fixed-width VST_ENTRY/VST_BBENTRY strings.
1271 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
1272 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 3));
1273 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8));
1274 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
1275 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 8));
1276 if (Stream.EmitBlockInfoAbbrev(bitc::VALUE_SYMTAB_BLOCK_ID,
1277 Abbv) != VST_ENTRY_8_ABBREV)
1278 llvm_unreachable("Unexpected abbrev ordering!");
1281 { // 7-bit fixed width VST_ENTRY strings.
1282 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
1283 Abbv->Add(BitCodeAbbrevOp(bitc::VST_CODE_ENTRY));
1284 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8));
1285 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
1286 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 7));
1287 if (Stream.EmitBlockInfoAbbrev(bitc::VALUE_SYMTAB_BLOCK_ID,
1288 Abbv) != VST_ENTRY_7_ABBREV)
1289 llvm_unreachable("Unexpected abbrev ordering!");
1291 { // 6-bit char6 VST_ENTRY strings.
1292 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
1293 Abbv->Add(BitCodeAbbrevOp(bitc::VST_CODE_ENTRY));
1294 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8));
1295 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
1296 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Char6));
1297 if (Stream.EmitBlockInfoAbbrev(bitc::VALUE_SYMTAB_BLOCK_ID,
1298 Abbv) != VST_ENTRY_6_ABBREV)
1299 llvm_unreachable("Unexpected abbrev ordering!");
1301 { // 6-bit char6 VST_BBENTRY strings.
1302 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
1303 Abbv->Add(BitCodeAbbrevOp(bitc::VST_CODE_BBENTRY));
1304 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8));
1305 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
1306 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Char6));
1307 if (Stream.EmitBlockInfoAbbrev(bitc::VALUE_SYMTAB_BLOCK_ID,
1308 Abbv) != VST_BBENTRY_6_ABBREV)
1309 llvm_unreachable("Unexpected abbrev ordering!");
1314 { // SETTYPE abbrev for CONSTANTS_BLOCK.
1315 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
1316 Abbv->Add(BitCodeAbbrevOp(bitc::CST_CODE_SETTYPE));
1317 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed,
1318 Log2_32_Ceil(VE.getTypes().size()+1)));
1319 if (Stream.EmitBlockInfoAbbrev(bitc::CONSTANTS_BLOCK_ID,
1320 Abbv) != CONSTANTS_SETTYPE_ABBREV)
1321 llvm_unreachable("Unexpected abbrev ordering!");
1324 { // INTEGER abbrev for CONSTANTS_BLOCK.
1325 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
1326 Abbv->Add(BitCodeAbbrevOp(bitc::CST_CODE_INTEGER));
1327 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8));
1328 if (Stream.EmitBlockInfoAbbrev(bitc::CONSTANTS_BLOCK_ID,
1329 Abbv) != CONSTANTS_INTEGER_ABBREV)
1330 llvm_unreachable("Unexpected abbrev ordering!");
1333 { // CE_CAST abbrev for CONSTANTS_BLOCK.
1334 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
1335 Abbv->Add(BitCodeAbbrevOp(bitc::CST_CODE_CE_CAST));
1336 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 4)); // cast opc
1337 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, // typeid
1338 Log2_32_Ceil(VE.getTypes().size()+1)));
1339 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8)); // value id
1341 if (Stream.EmitBlockInfoAbbrev(bitc::CONSTANTS_BLOCK_ID,
1342 Abbv) != CONSTANTS_CE_CAST_Abbrev)
1343 llvm_unreachable("Unexpected abbrev ordering!");
1345 { // NULL abbrev for CONSTANTS_BLOCK.
1346 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
1347 Abbv->Add(BitCodeAbbrevOp(bitc::CST_CODE_NULL));
1348 if (Stream.EmitBlockInfoAbbrev(bitc::CONSTANTS_BLOCK_ID,
1349 Abbv) != CONSTANTS_NULL_Abbrev)
1350 llvm_unreachable("Unexpected abbrev ordering!");
1353 // FIXME: This should only use space for first class types!
1355 { // INST_LOAD abbrev for FUNCTION_BLOCK.
1356 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
1357 Abbv->Add(BitCodeAbbrevOp(bitc::FUNC_CODE_INST_LOAD));
1358 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Ptr
1359 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 4)); // Align
1360 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // volatile
1361 if (Stream.EmitBlockInfoAbbrev(bitc::FUNCTION_BLOCK_ID,
1362 Abbv) != FUNCTION_INST_LOAD_ABBREV)
1363 llvm_unreachable("Unexpected abbrev ordering!");
1365 { // INST_BINOP abbrev for FUNCTION_BLOCK.
1366 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
1367 Abbv->Add(BitCodeAbbrevOp(bitc::FUNC_CODE_INST_BINOP));
1368 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // LHS
1369 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // RHS
1370 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 4)); // opc
1371 if (Stream.EmitBlockInfoAbbrev(bitc::FUNCTION_BLOCK_ID,
1372 Abbv) != FUNCTION_INST_BINOP_ABBREV)
1373 llvm_unreachable("Unexpected abbrev ordering!");
1375 { // INST_BINOP_FLAGS abbrev for FUNCTION_BLOCK.
1376 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
1377 Abbv->Add(BitCodeAbbrevOp(bitc::FUNC_CODE_INST_BINOP));
1378 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // LHS
1379 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // RHS
1380 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 4)); // opc
1381 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 7)); // flags
1382 if (Stream.EmitBlockInfoAbbrev(bitc::FUNCTION_BLOCK_ID,
1383 Abbv) != FUNCTION_INST_BINOP_FLAGS_ABBREV)
1384 llvm_unreachable("Unexpected abbrev ordering!");
1386 { // INST_CAST abbrev for FUNCTION_BLOCK.
1387 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
1388 Abbv->Add(BitCodeAbbrevOp(bitc::FUNC_CODE_INST_CAST));
1389 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // OpVal
1390 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, // dest ty
1391 Log2_32_Ceil(VE.getTypes().size()+1)));
1392 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 4)); // opc
1393 if (Stream.EmitBlockInfoAbbrev(bitc::FUNCTION_BLOCK_ID,
1394 Abbv) != FUNCTION_INST_CAST_ABBREV)
1395 llvm_unreachable("Unexpected abbrev ordering!");
1398 { // INST_RET abbrev for FUNCTION_BLOCK.
1399 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
1400 Abbv->Add(BitCodeAbbrevOp(bitc::FUNC_CODE_INST_RET));
1401 if (Stream.EmitBlockInfoAbbrev(bitc::FUNCTION_BLOCK_ID,
1402 Abbv) != FUNCTION_INST_RET_VOID_ABBREV)
1403 llvm_unreachable("Unexpected abbrev ordering!");
1405 { // INST_RET abbrev for FUNCTION_BLOCK.
1406 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
1407 Abbv->Add(BitCodeAbbrevOp(bitc::FUNC_CODE_INST_RET));
1408 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // ValID
1409 if (Stream.EmitBlockInfoAbbrev(bitc::FUNCTION_BLOCK_ID,
1410 Abbv) != FUNCTION_INST_RET_VAL_ABBREV)
1411 llvm_unreachable("Unexpected abbrev ordering!");
1413 { // INST_UNREACHABLE abbrev for FUNCTION_BLOCK.
1414 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
1415 Abbv->Add(BitCodeAbbrevOp(bitc::FUNC_CODE_INST_UNREACHABLE));
1416 if (Stream.EmitBlockInfoAbbrev(bitc::FUNCTION_BLOCK_ID,
1417 Abbv) != FUNCTION_INST_UNREACHABLE_ABBREV)
1418 llvm_unreachable("Unexpected abbrev ordering!");
1425 /// WriteModule - Emit the specified module to the bitstream.
1426 static void WriteModule(const Module *M, BitstreamWriter &Stream) {
1427 Stream.EnterSubblock(bitc::MODULE_BLOCK_ID, 3);
1429 // Emit the version number if it is non-zero.
1431 SmallVector<unsigned, 1> Vals;
1432 Vals.push_back(CurVersion);
1433 Stream.EmitRecord(bitc::MODULE_CODE_VERSION, Vals);
1436 // Analyze the module, enumerating globals, functions, etc.
1437 ValueEnumerator VE(M);
1439 // Emit blockinfo, which defines the standard abbreviations etc.
1440 WriteBlockInfo(VE, Stream);
1442 // Emit information about parameter attributes.
1443 WriteAttributeTable(VE, Stream);
1445 // Emit information describing all of the types in the module.
1446 WriteTypeTable(VE, Stream);
1448 // Emit top-level description of module, including target triple, inline asm,
1449 // descriptors for global variables, and function prototype info.
1450 WriteModuleInfo(M, VE, Stream);
1453 WriteModuleConstants(VE, Stream);
1456 WriteModuleMetadata(VE, Stream);
1458 // Emit function bodies.
1459 for (Module::const_iterator I = M->begin(), E = M->end(); I != E; ++I)
1460 if (!I->isDeclaration())
1461 WriteFunction(*I, VE, Stream);
1464 WriteModuleMetadataStore(M, VE, Stream);
1466 // Emit the type symbol table information.
1467 WriteTypeSymbolTable(M->getTypeSymbolTable(), VE, Stream);
1469 // Emit names for globals/functions etc.
1470 WriteValueSymbolTable(M->getValueSymbolTable(), VE, Stream);
1475 /// EmitDarwinBCHeader - If generating a bc file on darwin, we have to emit a
1476 /// header and trailer to make it compatible with the system archiver. To do
1477 /// this we emit the following header, and then emit a trailer that pads the
1478 /// file out to be a multiple of 16 bytes.
1480 /// struct bc_header {
1481 /// uint32_t Magic; // 0x0B17C0DE
1482 /// uint32_t Version; // Version, currently always 0.
1483 /// uint32_t BitcodeOffset; // Offset to traditional bitcode file.
1484 /// uint32_t BitcodeSize; // Size of traditional bitcode file.
1485 /// uint32_t CPUType; // CPU specifier.
1486 /// ... potentially more later ...
1489 DarwinBCSizeFieldOffset = 3*4, // Offset to bitcode_size.
1490 DarwinBCHeaderSize = 5*4
1493 static void EmitDarwinBCHeader(BitstreamWriter &Stream,
1494 const std::string &TT) {
1495 unsigned CPUType = ~0U;
1497 // Match x86_64-*, i[3-9]86-*, powerpc-*, powerpc64-*. The CPUType is a
1498 // magic number from /usr/include/mach/machine.h. It is ok to reproduce the
1499 // specific constants here because they are implicitly part of the Darwin ABI.
1501 DARWIN_CPU_ARCH_ABI64 = 0x01000000,
1502 DARWIN_CPU_TYPE_X86 = 7,
1503 DARWIN_CPU_TYPE_POWERPC = 18
1506 if (TT.find("x86_64-") == 0)
1507 CPUType = DARWIN_CPU_TYPE_X86 | DARWIN_CPU_ARCH_ABI64;
1508 else if (TT.size() >= 5 && TT[0] == 'i' && TT[2] == '8' && TT[3] == '6' &&
1509 TT[4] == '-' && TT[1] - '3' < 6)
1510 CPUType = DARWIN_CPU_TYPE_X86;
1511 else if (TT.find("powerpc-") == 0)
1512 CPUType = DARWIN_CPU_TYPE_POWERPC;
1513 else if (TT.find("powerpc64-") == 0)
1514 CPUType = DARWIN_CPU_TYPE_POWERPC | DARWIN_CPU_ARCH_ABI64;
1516 // Traditional Bitcode starts after header.
1517 unsigned BCOffset = DarwinBCHeaderSize;
1519 Stream.Emit(0x0B17C0DE, 32);
1520 Stream.Emit(0 , 32); // Version.
1521 Stream.Emit(BCOffset , 32);
1522 Stream.Emit(0 , 32); // Filled in later.
1523 Stream.Emit(CPUType , 32);
1526 /// EmitDarwinBCTrailer - Emit the darwin epilog after the bitcode file and
1527 /// finalize the header.
1528 static void EmitDarwinBCTrailer(BitstreamWriter &Stream, unsigned BufferSize) {
1529 // Update the size field in the header.
1530 Stream.BackpatchWord(DarwinBCSizeFieldOffset, BufferSize-DarwinBCHeaderSize);
1532 // If the file is not a multiple of 16 bytes, insert dummy padding.
1533 while (BufferSize & 15) {
1540 /// WriteBitcodeToFile - Write the specified module to the specified output
1542 void llvm::WriteBitcodeToFile(const Module *M, raw_ostream &Out) {
1543 std::vector<unsigned char> Buffer;
1544 BitstreamWriter Stream(Buffer);
1546 Buffer.reserve(256*1024);
1548 WriteBitcodeToStream( M, Stream );
1550 // If writing to stdout, set binary mode.
1551 if (&llvm::outs() == &Out)
1552 sys::Program::ChangeStdoutToBinary();
1554 // Write the generated bitstream to "Out".
1555 Out.write((char*)&Buffer.front(), Buffer.size());
1557 // Make sure it hits disk now.
1561 /// WriteBitcodeToStream - Write the specified module to the specified output
1563 void llvm::WriteBitcodeToStream(const Module *M, BitstreamWriter &Stream) {
1564 // If this is darwin, emit a file header and trailer if needed.
1565 bool isDarwin = M->getTargetTriple().find("-darwin") != std::string::npos;
1567 EmitDarwinBCHeader(Stream, M->getTargetTriple());
1569 // Emit the file header.
1570 Stream.Emit((unsigned)'B', 8);
1571 Stream.Emit((unsigned)'C', 8);
1572 Stream.Emit(0x0, 4);
1573 Stream.Emit(0xC, 4);
1574 Stream.Emit(0xE, 4);
1575 Stream.Emit(0xD, 4);
1578 WriteModule(M, Stream);
1581 EmitDarwinBCTrailer(Stream, Stream.getBuffer().size());