1 //===--- Bitcode/Writer/BitcodeWriter.cpp - Bitcode Writer ----------------===//
3 // The LLVM Compiler Infrastructure
5 // This file was developed by Chris Lattner and is distributed under
6 // the University of Illinois Open Source 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/Instructions.h"
21 #include "llvm/Module.h"
22 #include "llvm/ParameterAttributes.h"
23 #include "llvm/TypeSymbolTable.h"
24 #include "llvm/ValueSymbolTable.h"
25 #include "llvm/Support/MathExtras.h"
28 /// These are manifest constants used by the bitcode writer. They do not need to
29 /// be kept in sync with the reader, but need to be consistent within this file.
33 // VALUE_SYMTAB_BLOCK abbrev id's.
34 VST_ENTRY_8_ABBREV = bitc::FIRST_APPLICATION_ABBREV,
39 // CONSTANTS_BLOCK abbrev id's.
40 CONSTANTS_SETTYPE_ABBREV = bitc::FIRST_APPLICATION_ABBREV,
41 CONSTANTS_INTEGER_ABBREV,
42 CONSTANTS_CE_CAST_Abbrev,
47 static unsigned GetEncodedCastOpcode(unsigned Opcode) {
49 default: assert(0 && "Unknown cast instruction!");
50 case Instruction::Trunc : return bitc::CAST_TRUNC;
51 case Instruction::ZExt : return bitc::CAST_ZEXT;
52 case Instruction::SExt : return bitc::CAST_SEXT;
53 case Instruction::FPToUI : return bitc::CAST_FPTOUI;
54 case Instruction::FPToSI : return bitc::CAST_FPTOSI;
55 case Instruction::UIToFP : return bitc::CAST_UITOFP;
56 case Instruction::SIToFP : return bitc::CAST_SITOFP;
57 case Instruction::FPTrunc : return bitc::CAST_FPTRUNC;
58 case Instruction::FPExt : return bitc::CAST_FPEXT;
59 case Instruction::PtrToInt: return bitc::CAST_PTRTOINT;
60 case Instruction::IntToPtr: return bitc::CAST_INTTOPTR;
61 case Instruction::BitCast : return bitc::CAST_BITCAST;
65 static unsigned GetEncodedBinaryOpcode(unsigned Opcode) {
67 default: assert(0 && "Unknown binary instruction!");
68 case Instruction::Add: return bitc::BINOP_ADD;
69 case Instruction::Sub: return bitc::BINOP_SUB;
70 case Instruction::Mul: return bitc::BINOP_MUL;
71 case Instruction::UDiv: return bitc::BINOP_UDIV;
72 case Instruction::FDiv:
73 case Instruction::SDiv: return bitc::BINOP_SDIV;
74 case Instruction::URem: return bitc::BINOP_UREM;
75 case Instruction::FRem:
76 case Instruction::SRem: return bitc::BINOP_SREM;
77 case Instruction::Shl: return bitc::BINOP_SHL;
78 case Instruction::LShr: return bitc::BINOP_LSHR;
79 case Instruction::AShr: return bitc::BINOP_ASHR;
80 case Instruction::And: return bitc::BINOP_AND;
81 case Instruction::Or: return bitc::BINOP_OR;
82 case Instruction::Xor: return bitc::BINOP_XOR;
88 static void WriteStringRecord(unsigned Code, const std::string &Str,
89 unsigned AbbrevToUse, BitstreamWriter &Stream) {
90 SmallVector<unsigned, 64> Vals;
92 // Code: [strchar x N]
93 for (unsigned i = 0, e = Str.size(); i != e; ++i)
94 Vals.push_back(Str[i]);
96 // Emit the finished record.
97 Stream.EmitRecord(Code, Vals, AbbrevToUse);
100 // Emit information about parameter attributes.
101 static void WriteParamAttrTable(const ValueEnumerator &VE,
102 BitstreamWriter &Stream) {
103 const std::vector<const ParamAttrsList*> &Attrs = VE.getParamAttrs();
104 if (Attrs.empty()) return;
106 Stream.EnterSubblock(bitc::PARAMATTR_BLOCK_ID, 3);
108 SmallVector<uint64_t, 64> Record;
109 for (unsigned i = 0, e = Attrs.size(); i != e; ++i) {
110 const ParamAttrsList *A = Attrs[i];
111 for (unsigned op = 0, e = A->size(); op != e; ++op) {
112 Record.push_back(A->getParamIndex(op));
113 Record.push_back(A->getParamAttrsAtIndex(op));
116 Stream.EmitRecord(bitc::PARAMATTR_CODE_ENTRY, Record);
123 /// WriteTypeTable - Write out the type table for a module.
124 static void WriteTypeTable(const ValueEnumerator &VE, BitstreamWriter &Stream) {
125 const ValueEnumerator::TypeList &TypeList = VE.getTypes();
127 Stream.EnterSubblock(bitc::TYPE_BLOCK_ID, 4 /*count from # abbrevs */);
128 SmallVector<uint64_t, 64> TypeVals;
130 // Abbrev for TYPE_CODE_POINTER.
131 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
132 Abbv->Add(BitCodeAbbrevOp(bitc::TYPE_CODE_POINTER));
133 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed,
134 Log2_32_Ceil(VE.getTypes().size()+1)));
135 unsigned PtrAbbrev = Stream.EmitAbbrev(Abbv);
137 // Abbrev for TYPE_CODE_FUNCTION.
138 Abbv = new BitCodeAbbrev();
139 Abbv->Add(BitCodeAbbrevOp(bitc::TYPE_CODE_FUNCTION));
140 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // isvararg
141 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed,
142 Log2_32_Ceil(VE.getParamAttrs().size()+1)));
143 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
144 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed,
145 Log2_32_Ceil(VE.getTypes().size()+1)));
146 unsigned FunctionAbbrev = Stream.EmitAbbrev(Abbv);
148 // Abbrev for TYPE_CODE_STRUCT.
149 Abbv = new BitCodeAbbrev();
150 Abbv->Add(BitCodeAbbrevOp(bitc::TYPE_CODE_STRUCT));
151 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // ispacked
152 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
153 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed,
154 Log2_32_Ceil(VE.getTypes().size()+1)));
155 unsigned StructAbbrev = Stream.EmitAbbrev(Abbv);
157 // Abbrev for TYPE_CODE_ARRAY.
158 Abbv = new BitCodeAbbrev();
159 Abbv->Add(BitCodeAbbrevOp(bitc::TYPE_CODE_ARRAY));
160 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8)); // size
161 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed,
162 Log2_32_Ceil(VE.getTypes().size()+1)));
163 unsigned ArrayAbbrev = Stream.EmitAbbrev(Abbv);
165 // Emit an entry count so the reader can reserve space.
166 TypeVals.push_back(TypeList.size());
167 Stream.EmitRecord(bitc::TYPE_CODE_NUMENTRY, TypeVals);
170 // Loop over all of the types, emitting each in turn.
171 for (unsigned i = 0, e = TypeList.size(); i != e; ++i) {
172 const Type *T = TypeList[i].first;
176 switch (T->getTypeID()) {
177 case Type::PackedStructTyID: // FIXME: Delete Type::PackedStructTyID.
178 default: assert(0 && "Unknown type!");
179 case Type::VoidTyID: Code = bitc::TYPE_CODE_VOID; break;
180 case Type::FloatTyID: Code = bitc::TYPE_CODE_FLOAT; break;
181 case Type::DoubleTyID: Code = bitc::TYPE_CODE_DOUBLE; break;
182 case Type::LabelTyID: Code = bitc::TYPE_CODE_LABEL; break;
183 case Type::OpaqueTyID: Code = bitc::TYPE_CODE_OPAQUE; break;
184 case Type::IntegerTyID:
186 Code = bitc::TYPE_CODE_INTEGER;
187 TypeVals.push_back(cast<IntegerType>(T)->getBitWidth());
189 case Type::PointerTyID:
190 // POINTER: [pointee type]
191 Code = bitc::TYPE_CODE_POINTER;
192 TypeVals.push_back(VE.getTypeID(cast<PointerType>(T)->getElementType()));
193 AbbrevToUse = PtrAbbrev;
196 case Type::FunctionTyID: {
197 const FunctionType *FT = cast<FunctionType>(T);
198 // FUNCTION: [isvararg, attrid, retty, paramty x N]
199 Code = bitc::TYPE_CODE_FUNCTION;
200 TypeVals.push_back(FT->isVarArg());
201 TypeVals.push_back(VE.getParamAttrID(FT->getParamAttrs()));
202 TypeVals.push_back(VE.getTypeID(FT->getReturnType()));
203 for (unsigned i = 0, e = FT->getNumParams(); i != e; ++i)
204 TypeVals.push_back(VE.getTypeID(FT->getParamType(i)));
205 AbbrevToUse = FunctionAbbrev;
208 case Type::StructTyID: {
209 const StructType *ST = cast<StructType>(T);
210 // STRUCT: [ispacked, eltty x N]
211 Code = bitc::TYPE_CODE_STRUCT;
212 TypeVals.push_back(ST->isPacked());
213 // Output all of the element types.
214 for (StructType::element_iterator I = ST->element_begin(),
215 E = ST->element_end(); I != E; ++I)
216 TypeVals.push_back(VE.getTypeID(*I));
217 AbbrevToUse = StructAbbrev;
220 case Type::ArrayTyID: {
221 const ArrayType *AT = cast<ArrayType>(T);
222 // ARRAY: [numelts, eltty]
223 Code = bitc::TYPE_CODE_ARRAY;
224 TypeVals.push_back(AT->getNumElements());
225 TypeVals.push_back(VE.getTypeID(AT->getElementType()));
226 AbbrevToUse = ArrayAbbrev;
229 case Type::VectorTyID: {
230 const VectorType *VT = cast<VectorType>(T);
231 // VECTOR [numelts, eltty]
232 Code = bitc::TYPE_CODE_VECTOR;
233 TypeVals.push_back(VT->getNumElements());
234 TypeVals.push_back(VE.getTypeID(VT->getElementType()));
239 // Emit the finished record.
240 Stream.EmitRecord(Code, TypeVals, AbbrevToUse);
247 static unsigned getEncodedLinkage(const GlobalValue *GV) {
248 switch (GV->getLinkage()) {
249 default: assert(0 && "Invalid linkage!");
250 case GlobalValue::ExternalLinkage: return 0;
251 case GlobalValue::WeakLinkage: return 1;
252 case GlobalValue::AppendingLinkage: return 2;
253 case GlobalValue::InternalLinkage: return 3;
254 case GlobalValue::LinkOnceLinkage: return 4;
255 case GlobalValue::DLLImportLinkage: return 5;
256 case GlobalValue::DLLExportLinkage: return 6;
257 case GlobalValue::ExternalWeakLinkage: return 7;
261 static unsigned getEncodedVisibility(const GlobalValue *GV) {
262 switch (GV->getVisibility()) {
263 default: assert(0 && "Invalid visibility!");
264 case GlobalValue::DefaultVisibility: return 0;
265 case GlobalValue::HiddenVisibility: return 1;
266 case GlobalValue::ProtectedVisibility: return 2;
270 // Emit top-level description of module, including target triple, inline asm,
271 // descriptors for global variables, and function prototype info.
272 static void WriteModuleInfo(const Module *M, const ValueEnumerator &VE,
273 BitstreamWriter &Stream) {
274 // Emit the list of dependent libraries for the Module.
275 for (Module::lib_iterator I = M->lib_begin(), E = M->lib_end(); I != E; ++I)
276 WriteStringRecord(bitc::MODULE_CODE_DEPLIB, *I, 0/*TODO*/, Stream);
278 // Emit various pieces of data attached to a module.
279 if (!M->getTargetTriple().empty())
280 WriteStringRecord(bitc::MODULE_CODE_TRIPLE, M->getTargetTriple(),
282 if (!M->getDataLayout().empty())
283 WriteStringRecord(bitc::MODULE_CODE_DATALAYOUT, M->getDataLayout(),
285 if (!M->getModuleInlineAsm().empty())
286 WriteStringRecord(bitc::MODULE_CODE_ASM, M->getModuleInlineAsm(),
289 // Emit information about sections, computing how many there are. Also
290 // compute the maximum alignment value.
291 std::map<std::string, unsigned> SectionMap;
292 unsigned MaxAlignment = 0;
293 unsigned MaxGlobalType = 0;
294 for (Module::const_global_iterator GV = M->global_begin(),E = M->global_end();
296 MaxAlignment = std::max(MaxAlignment, GV->getAlignment());
297 MaxGlobalType = std::max(MaxGlobalType, VE.getTypeID(GV->getType()));
299 if (!GV->hasSection()) continue;
300 // Give section names unique ID's.
301 unsigned &Entry = SectionMap[GV->getSection()];
302 if (Entry != 0) continue;
303 WriteStringRecord(bitc::MODULE_CODE_SECTIONNAME, GV->getSection(),
305 Entry = SectionMap.size();
307 for (Module::const_iterator F = M->begin(), E = M->end(); F != E; ++F) {
308 MaxAlignment = std::max(MaxAlignment, F->getAlignment());
309 if (!F->hasSection()) continue;
310 // Give section names unique ID's.
311 unsigned &Entry = SectionMap[F->getSection()];
312 if (Entry != 0) continue;
313 WriteStringRecord(bitc::MODULE_CODE_SECTIONNAME, F->getSection(),
315 Entry = SectionMap.size();
318 // Emit abbrev for globals, now that we know # sections and max alignment.
319 unsigned SimpleGVarAbbrev = 0;
320 if (!M->global_empty()) {
321 // Add an abbrev for common globals with no visibility or thread localness.
322 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
323 Abbv->Add(BitCodeAbbrevOp(bitc::MODULE_CODE_GLOBALVAR));
324 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed,
325 Log2_32_Ceil(MaxGlobalType+1)));
326 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // Constant.
327 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Initializer.
328 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 3)); // Linkage.
329 if (MaxAlignment == 0) // Alignment.
330 Abbv->Add(BitCodeAbbrevOp(0));
332 unsigned MaxEncAlignment = Log2_32(MaxAlignment)+1;
333 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed,
334 Log2_32_Ceil(MaxEncAlignment+1)));
336 if (SectionMap.empty()) // Section.
337 Abbv->Add(BitCodeAbbrevOp(0));
339 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed,
340 Log2_32_Ceil(SectionMap.size()+1)));
341 // Don't bother emitting vis + thread local.
342 SimpleGVarAbbrev = Stream.EmitAbbrev(Abbv);
345 // Emit the global variable information.
346 SmallVector<unsigned, 64> Vals;
347 for (Module::const_global_iterator GV = M->global_begin(),E = M->global_end();
349 unsigned AbbrevToUse = 0;
351 // GLOBALVAR: [type, isconst, initid,
352 // linkage, alignment, section, visibility, threadlocal]
353 Vals.push_back(VE.getTypeID(GV->getType()));
354 Vals.push_back(GV->isConstant());
355 Vals.push_back(GV->isDeclaration() ? 0 :
356 (VE.getValueID(GV->getInitializer()) + 1));
357 Vals.push_back(getEncodedLinkage(GV));
358 Vals.push_back(Log2_32(GV->getAlignment())+1);
359 Vals.push_back(GV->hasSection() ? SectionMap[GV->getSection()] : 0);
360 if (GV->isThreadLocal() ||
361 GV->getVisibility() != GlobalValue::DefaultVisibility) {
362 Vals.push_back(getEncodedVisibility(GV));
363 Vals.push_back(GV->isThreadLocal());
365 AbbrevToUse = SimpleGVarAbbrev;
368 Stream.EmitRecord(bitc::MODULE_CODE_GLOBALVAR, Vals, AbbrevToUse);
372 // Emit the function proto information.
373 for (Module::const_iterator F = M->begin(), E = M->end(); F != E; ++F) {
374 // FUNCTION: [type, callingconv, isproto, linkage, alignment, section,
376 Vals.push_back(VE.getTypeID(F->getType()));
377 Vals.push_back(F->getCallingConv());
378 Vals.push_back(F->isDeclaration());
379 Vals.push_back(getEncodedLinkage(F));
380 Vals.push_back(Log2_32(F->getAlignment())+1);
381 Vals.push_back(F->hasSection() ? SectionMap[F->getSection()] : 0);
382 Vals.push_back(getEncodedVisibility(F));
384 unsigned AbbrevToUse = 0;
385 Stream.EmitRecord(bitc::MODULE_CODE_FUNCTION, Vals, AbbrevToUse);
390 // Emit the alias information.
391 for (Module::const_alias_iterator AI = M->alias_begin(), E = M->alias_end();
393 Vals.push_back(VE.getTypeID(AI->getType()));
394 Vals.push_back(VE.getValueID(AI->getAliasee()));
395 Vals.push_back(getEncodedLinkage(AI));
396 unsigned AbbrevToUse = 0;
397 Stream.EmitRecord(bitc::MODULE_CODE_ALIAS, Vals, AbbrevToUse);
403 static void WriteConstants(unsigned FirstVal, unsigned LastVal,
404 const ValueEnumerator &VE,
405 BitstreamWriter &Stream, bool isGlobal) {
406 if (FirstVal == LastVal) return;
408 Stream.EnterSubblock(bitc::CONSTANTS_BLOCK_ID, 4);
410 unsigned AggregateAbbrev = 0;
411 unsigned GEPAbbrev = 0;
412 // If this is a constant pool for the module, emit module-specific abbrevs.
414 // Abbrev for CST_CODE_AGGREGATE.
415 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
416 Abbv->Add(BitCodeAbbrevOp(bitc::CST_CODE_AGGREGATE));
417 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
418 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, Log2_32_Ceil(LastVal+1)));
419 AggregateAbbrev = Stream.EmitAbbrev(Abbv);
422 // FIXME: Install and use abbrevs to reduce size. Install them globally so
423 // they don't need to be reemitted for each function body.
425 SmallVector<uint64_t, 64> Record;
427 const ValueEnumerator::ValueList &Vals = VE.getValues();
428 const Type *LastTy = 0;
429 for (unsigned i = FirstVal; i != LastVal; ++i) {
430 const Value *V = Vals[i].first;
431 // If we need to switch types, do so now.
432 if (V->getType() != LastTy) {
433 LastTy = V->getType();
434 Record.push_back(VE.getTypeID(LastTy));
435 Stream.EmitRecord(bitc::CST_CODE_SETTYPE, Record,
436 CONSTANTS_SETTYPE_ABBREV);
440 if (const InlineAsm *IA = dyn_cast<InlineAsm>(V)) {
441 assert(0 && IA && "FIXME: Inline asm writing unimp!");
444 const Constant *C = cast<Constant>(V);
446 unsigned AbbrevToUse = 0;
447 if (C->isNullValue()) {
448 Code = bitc::CST_CODE_NULL;
449 } else if (isa<UndefValue>(C)) {
450 Code = bitc::CST_CODE_UNDEF;
451 } else if (const ConstantInt *IV = dyn_cast<ConstantInt>(C)) {
452 if (IV->getBitWidth() <= 64) {
453 int64_t V = IV->getSExtValue();
455 Record.push_back(V << 1);
457 Record.push_back((-V << 1) | 1);
458 Code = bitc::CST_CODE_INTEGER;
459 AbbrevToUse = CONSTANTS_INTEGER_ABBREV;
460 } else { // Wide integers, > 64 bits in size.
461 // We have an arbitrary precision integer value to write whose
462 // bit width is > 64. However, in canonical unsigned integer
463 // format it is likely that the high bits are going to be zero.
464 // So, we only write the number of active words.
465 unsigned NWords = IV->getValue().getActiveWords();
466 const uint64_t *RawWords = IV->getValue().getRawData();
467 for (unsigned i = 0; i != NWords; ++i) {
468 int64_t V = RawWords[i];
470 Record.push_back(V << 1);
472 Record.push_back((-V << 1) | 1);
474 Code = bitc::CST_CODE_WIDE_INTEGER;
476 } else if (const ConstantFP *CFP = dyn_cast<ConstantFP>(C)) {
477 Code = bitc::CST_CODE_FLOAT;
478 if (CFP->getType() == Type::FloatTy) {
479 Record.push_back(FloatToBits((float)CFP->getValue()));
481 assert (CFP->getType() == Type::DoubleTy && "Unknown FP type!");
482 Record.push_back(DoubleToBits((double)CFP->getValue()));
484 } else if (isa<ConstantArray>(C) || isa<ConstantStruct>(V) ||
485 isa<ConstantVector>(V)) {
486 Code = bitc::CST_CODE_AGGREGATE;
487 for (unsigned i = 0, e = C->getNumOperands(); i != e; ++i)
488 Record.push_back(VE.getValueID(C->getOperand(i)));
489 AbbrevToUse = AggregateAbbrev;
490 } else if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(C)) {
491 switch (CE->getOpcode()) {
493 if (Instruction::isCast(CE->getOpcode())) {
494 Code = bitc::CST_CODE_CE_CAST;
495 Record.push_back(GetEncodedCastOpcode(CE->getOpcode()));
496 Record.push_back(VE.getTypeID(C->getOperand(0)->getType()));
497 Record.push_back(VE.getValueID(C->getOperand(0)));
498 AbbrevToUse = CONSTANTS_CE_CAST_Abbrev;
500 assert(CE->getNumOperands() == 2 && "Unknown constant expr!");
501 Code = bitc::CST_CODE_CE_BINOP;
502 Record.push_back(GetEncodedBinaryOpcode(CE->getOpcode()));
503 Record.push_back(VE.getValueID(C->getOperand(0)));
504 Record.push_back(VE.getValueID(C->getOperand(1)));
507 case Instruction::GetElementPtr:
508 Code = bitc::CST_CODE_CE_GEP;
509 for (unsigned i = 0, e = CE->getNumOperands(); i != e; ++i) {
510 Record.push_back(VE.getTypeID(C->getOperand(i)->getType()));
511 Record.push_back(VE.getValueID(C->getOperand(i)));
513 AbbrevToUse = GEPAbbrev;
515 case Instruction::Select:
516 Code = bitc::CST_CODE_CE_SELECT;
517 Record.push_back(VE.getValueID(C->getOperand(0)));
518 Record.push_back(VE.getValueID(C->getOperand(1)));
519 Record.push_back(VE.getValueID(C->getOperand(2)));
521 case Instruction::ExtractElement:
522 Code = bitc::CST_CODE_CE_EXTRACTELT;
523 Record.push_back(VE.getTypeID(C->getOperand(0)->getType()));
524 Record.push_back(VE.getValueID(C->getOperand(0)));
525 Record.push_back(VE.getValueID(C->getOperand(1)));
527 case Instruction::InsertElement:
528 Code = bitc::CST_CODE_CE_INSERTELT;
529 Record.push_back(VE.getValueID(C->getOperand(0)));
530 Record.push_back(VE.getValueID(C->getOperand(1)));
531 Record.push_back(VE.getValueID(C->getOperand(2)));
533 case Instruction::ShuffleVector:
534 Code = bitc::CST_CODE_CE_SHUFFLEVEC;
535 Record.push_back(VE.getValueID(C->getOperand(0)));
536 Record.push_back(VE.getValueID(C->getOperand(1)));
537 Record.push_back(VE.getValueID(C->getOperand(2)));
539 case Instruction::ICmp:
540 case Instruction::FCmp:
541 Code = bitc::CST_CODE_CE_CMP;
542 Record.push_back(VE.getTypeID(C->getOperand(0)->getType()));
543 Record.push_back(VE.getValueID(C->getOperand(0)));
544 Record.push_back(VE.getValueID(C->getOperand(1)));
545 Record.push_back(CE->getPredicate());
549 assert(0 && "Unknown constant!");
551 Stream.EmitRecord(Code, Record, AbbrevToUse);
558 static void WriteModuleConstants(const ValueEnumerator &VE,
559 BitstreamWriter &Stream) {
560 const ValueEnumerator::ValueList &Vals = VE.getValues();
562 // Find the first constant to emit, which is the first non-globalvalue value.
563 // We know globalvalues have been emitted by WriteModuleInfo.
564 for (unsigned i = 0, e = Vals.size(); i != e; ++i) {
565 if (!isa<GlobalValue>(Vals[i].first)) {
566 WriteConstants(i, Vals.size(), VE, Stream, true);
572 /// WriteInstruction - Emit an instruction to the specified stream.
573 static void WriteInstruction(const Instruction &I, ValueEnumerator &VE,
574 BitstreamWriter &Stream,
575 SmallVector<unsigned, 64> &Vals) {
577 unsigned AbbrevToUse = 0;
578 switch (I.getOpcode()) {
580 if (Instruction::isCast(I.getOpcode())) {
581 Code = bitc::FUNC_CODE_INST_CAST;
582 Vals.push_back(GetEncodedCastOpcode(I.getOpcode()));
583 Vals.push_back(VE.getTypeID(I.getType()));
584 Vals.push_back(VE.getTypeID(I.getOperand(0)->getType()));
585 Vals.push_back(VE.getValueID(I.getOperand(0)));
587 assert(isa<BinaryOperator>(I) && "Unknown instruction!");
588 Code = bitc::FUNC_CODE_INST_BINOP;
589 Vals.push_back(GetEncodedBinaryOpcode(I.getOpcode()));
590 Vals.push_back(VE.getTypeID(I.getType()));
591 Vals.push_back(VE.getValueID(I.getOperand(0)));
592 Vals.push_back(VE.getValueID(I.getOperand(1)));
596 case Instruction::GetElementPtr:
597 Code = bitc::FUNC_CODE_INST_GEP;
598 for (unsigned i = 0, e = I.getNumOperands(); i != e; ++i) {
599 Vals.push_back(VE.getTypeID(I.getOperand(i)->getType()));
600 Vals.push_back(VE.getValueID(I.getOperand(i)));
603 case Instruction::Select:
604 Code = bitc::FUNC_CODE_INST_SELECT;
605 Vals.push_back(VE.getTypeID(I.getType()));
606 Vals.push_back(VE.getValueID(I.getOperand(0)));
607 Vals.push_back(VE.getValueID(I.getOperand(1)));
608 Vals.push_back(VE.getValueID(I.getOperand(2)));
610 case Instruction::ExtractElement:
611 Code = bitc::FUNC_CODE_INST_EXTRACTELT;
612 Vals.push_back(VE.getTypeID(I.getOperand(0)->getType()));
613 Vals.push_back(VE.getValueID(I.getOperand(0)));
614 Vals.push_back(VE.getValueID(I.getOperand(1)));
616 case Instruction::InsertElement:
617 Code = bitc::FUNC_CODE_INST_INSERTELT;
618 Vals.push_back(VE.getTypeID(I.getType()));
619 Vals.push_back(VE.getValueID(I.getOperand(0)));
620 Vals.push_back(VE.getValueID(I.getOperand(1)));
621 Vals.push_back(VE.getValueID(I.getOperand(2)));
623 case Instruction::ShuffleVector:
624 Code = bitc::FUNC_CODE_INST_SHUFFLEVEC;
625 Vals.push_back(VE.getTypeID(I.getType()));
626 Vals.push_back(VE.getValueID(I.getOperand(0)));
627 Vals.push_back(VE.getValueID(I.getOperand(1)));
628 Vals.push_back(VE.getValueID(I.getOperand(2)));
630 case Instruction::ICmp:
631 case Instruction::FCmp:
632 Code = bitc::FUNC_CODE_INST_CMP;
633 Vals.push_back(VE.getTypeID(I.getOperand(0)->getType()));
634 Vals.push_back(VE.getValueID(I.getOperand(0)));
635 Vals.push_back(VE.getValueID(I.getOperand(1)));
636 Vals.push_back(cast<CmpInst>(I).getPredicate());
639 case Instruction::Ret:
640 Code = bitc::FUNC_CODE_INST_RET;
641 if (I.getNumOperands()) {
642 Vals.push_back(VE.getTypeID(I.getOperand(0)->getType()));
643 Vals.push_back(VE.getValueID(I.getOperand(0)));
646 case Instruction::Br:
647 Code = bitc::FUNC_CODE_INST_BR;
648 Vals.push_back(VE.getValueID(I.getOperand(0)));
649 if (cast<BranchInst>(I).isConditional()) {
650 Vals.push_back(VE.getValueID(I.getOperand(1)));
651 Vals.push_back(VE.getValueID(I.getOperand(2)));
654 case Instruction::Switch:
655 Code = bitc::FUNC_CODE_INST_SWITCH;
656 Vals.push_back(VE.getTypeID(I.getOperand(0)->getType()));
657 for (unsigned i = 0, e = I.getNumOperands(); i != e; ++i)
658 Vals.push_back(VE.getValueID(I.getOperand(i)));
660 case Instruction::Invoke: {
661 Code = bitc::FUNC_CODE_INST_INVOKE;
662 Vals.push_back(cast<InvokeInst>(I).getCallingConv());
663 Vals.push_back(VE.getTypeID(I.getOperand(0)->getType()));
664 Vals.push_back(VE.getValueID(I.getOperand(0))); // callee
665 Vals.push_back(VE.getValueID(I.getOperand(1))); // normal
666 Vals.push_back(VE.getValueID(I.getOperand(2))); // unwind
668 // Emit value #'s for the fixed parameters.
669 const PointerType *PTy = cast<PointerType>(I.getOperand(0)->getType());
670 const FunctionType *FTy = cast<FunctionType>(PTy->getElementType());
671 for (unsigned i = 0, e = FTy->getNumParams(); i != e; ++i)
672 Vals.push_back(VE.getValueID(I.getOperand(i+3))); // fixed param.
674 // Emit type/value pairs for varargs params.
675 if (FTy->isVarArg()) {
676 unsigned NumVarargs = I.getNumOperands()-3-FTy->getNumParams();
677 for (unsigned i = I.getNumOperands()-NumVarargs, e = I.getNumOperands();
679 Vals.push_back(VE.getTypeID(I.getOperand(i)->getType()));
680 Vals.push_back(VE.getValueID(I.getOperand(i)));
685 case Instruction::Unwind:
686 Code = bitc::FUNC_CODE_INST_UNWIND;
688 case Instruction::Unreachable:
689 Code = bitc::FUNC_CODE_INST_UNREACHABLE;
692 case Instruction::PHI:
693 Code = bitc::FUNC_CODE_INST_PHI;
694 Vals.push_back(VE.getTypeID(I.getType()));
695 for (unsigned i = 0, e = I.getNumOperands(); i != e; ++i)
696 Vals.push_back(VE.getValueID(I.getOperand(i)));
699 case Instruction::Malloc:
700 Code = bitc::FUNC_CODE_INST_MALLOC;
701 Vals.push_back(VE.getTypeID(I.getType()));
702 Vals.push_back(VE.getValueID(I.getOperand(0))); // size.
703 Vals.push_back(Log2_32(cast<MallocInst>(I).getAlignment())+1);
706 case Instruction::Free:
707 Code = bitc::FUNC_CODE_INST_FREE;
708 Vals.push_back(VE.getTypeID(I.getOperand(0)->getType()));
709 Vals.push_back(VE.getValueID(I.getOperand(0)));
712 case Instruction::Alloca:
713 Code = bitc::FUNC_CODE_INST_ALLOCA;
714 Vals.push_back(VE.getTypeID(I.getType()));
715 Vals.push_back(VE.getValueID(I.getOperand(0))); // size.
716 Vals.push_back(Log2_32(cast<AllocaInst>(I).getAlignment())+1);
719 case Instruction::Load:
720 Code = bitc::FUNC_CODE_INST_LOAD;
721 Vals.push_back(VE.getTypeID(I.getOperand(0)->getType()));
722 Vals.push_back(VE.getValueID(I.getOperand(0))); // ptr.
723 Vals.push_back(Log2_32(cast<LoadInst>(I).getAlignment())+1);
724 Vals.push_back(cast<LoadInst>(I).isVolatile());
726 case Instruction::Store:
727 Code = bitc::FUNC_CODE_INST_STORE;
728 Vals.push_back(VE.getTypeID(I.getOperand(1)->getType())); // Pointer
729 Vals.push_back(VE.getValueID(I.getOperand(0))); // val.
730 Vals.push_back(VE.getValueID(I.getOperand(1))); // ptr.
731 Vals.push_back(Log2_32(cast<StoreInst>(I).getAlignment())+1);
732 Vals.push_back(cast<StoreInst>(I).isVolatile());
734 case Instruction::Call: {
735 Code = bitc::FUNC_CODE_INST_CALL;
736 Vals.push_back((cast<CallInst>(I).getCallingConv() << 1) |
737 cast<CallInst>(I).isTailCall());
738 Vals.push_back(VE.getTypeID(I.getOperand(0)->getType()));
739 Vals.push_back(VE.getValueID(I.getOperand(0))); // callee
741 // Emit value #'s for the fixed parameters.
742 const PointerType *PTy = cast<PointerType>(I.getOperand(0)->getType());
743 const FunctionType *FTy = cast<FunctionType>(PTy->getElementType());
744 for (unsigned i = 0, e = FTy->getNumParams(); i != e; ++i)
745 Vals.push_back(VE.getValueID(I.getOperand(i+1))); // fixed param.
747 // Emit type/value pairs for varargs params.
748 if (FTy->isVarArg()) {
749 unsigned NumVarargs = I.getNumOperands()-1-FTy->getNumParams();
750 for (unsigned i = I.getNumOperands()-NumVarargs, e = I.getNumOperands();
752 Vals.push_back(VE.getTypeID(I.getOperand(i)->getType()));
753 Vals.push_back(VE.getValueID(I.getOperand(i)));
758 case Instruction::VAArg:
759 Code = bitc::FUNC_CODE_INST_VAARG;
760 Vals.push_back(VE.getTypeID(I.getOperand(0)->getType())); // valistty
761 Vals.push_back(VE.getValueID(I.getOperand(0))); // valist.
762 Vals.push_back(VE.getTypeID(I.getType())); // restype.
766 Stream.EmitRecord(Code, Vals, AbbrevToUse);
770 // Emit names for globals/functions etc.
771 static void WriteValueSymbolTable(const ValueSymbolTable &VST,
772 const ValueEnumerator &VE,
773 BitstreamWriter &Stream) {
774 if (VST.empty()) return;
775 Stream.EnterSubblock(bitc::VALUE_SYMTAB_BLOCK_ID, 4);
777 // FIXME: Set up the abbrev, we know how many values there are!
778 // FIXME: We know if the type names can use 7-bit ascii.
779 SmallVector<unsigned, 64> NameVals;
781 for (ValueSymbolTable::const_iterator SI = VST.begin(), SE = VST.end();
784 const ValueName &Name = *SI;
786 // Figure out the encoding to use for the name.
789 for (const char *C = Name.getKeyData(), *E = C+Name.getKeyLength();
792 isChar6 = BitCodeAbbrevOp::isChar6(*C);
793 if ((unsigned char)*C & 128) {
795 break; // don't bother scanning the rest.
799 unsigned AbbrevToUse = VST_ENTRY_8_ABBREV;
801 // VST_ENTRY: [valueid, namechar x N]
802 // VST_BBENTRY: [bbid, namechar x N]
804 if (isa<BasicBlock>(SI->getValue())) {
805 Code = bitc::VST_CODE_BBENTRY;
807 AbbrevToUse = VST_BBENTRY_6_ABBREV;
809 Code = bitc::VST_CODE_ENTRY;
811 AbbrevToUse = VST_ENTRY_6_ABBREV;
813 AbbrevToUse = VST_ENTRY_7_ABBREV;
816 NameVals.push_back(VE.getValueID(SI->getValue()));
817 for (const char *P = Name.getKeyData(),
818 *E = Name.getKeyData()+Name.getKeyLength(); P != E; ++P)
819 NameVals.push_back((unsigned char)*P);
821 // Emit the finished record.
822 Stream.EmitRecord(Code, NameVals, AbbrevToUse);
828 /// WriteFunction - Emit a function body to the module stream.
829 static void WriteFunction(const Function &F, ValueEnumerator &VE,
830 BitstreamWriter &Stream) {
831 Stream.EnterSubblock(bitc::FUNCTION_BLOCK_ID, 3);
832 VE.incorporateFunction(F);
834 SmallVector<unsigned, 64> Vals;
836 // Emit the number of basic blocks, so the reader can create them ahead of
838 Vals.push_back(VE.getBasicBlocks().size());
839 Stream.EmitRecord(bitc::FUNC_CODE_DECLAREBLOCKS, Vals);
842 // FIXME: Function attributes?
844 // If there are function-local constants, emit them now.
845 unsigned CstStart, CstEnd;
846 VE.getFunctionConstantRange(CstStart, CstEnd);
847 WriteConstants(CstStart, CstEnd, VE, Stream, false);
849 // Finally, emit all the instructions, in order.
850 for (Function::const_iterator BB = F.begin(), E = F.end(); BB != E; ++BB)
851 for (BasicBlock::const_iterator I = BB->begin(), E = BB->end(); I != E; ++I)
852 WriteInstruction(*I, VE, Stream, Vals);
854 // Emit names for all the instructions etc.
855 WriteValueSymbolTable(F.getValueSymbolTable(), VE, Stream);
861 /// WriteTypeSymbolTable - Emit a block for the specified type symtab.
862 static void WriteTypeSymbolTable(const TypeSymbolTable &TST,
863 const ValueEnumerator &VE,
864 BitstreamWriter &Stream) {
865 if (TST.empty()) return;
867 Stream.EnterSubblock(bitc::TYPE_SYMTAB_BLOCK_ID, 3);
869 // 7-bit fixed width VST_CODE_ENTRY strings.
870 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
871 Abbv->Add(BitCodeAbbrevOp(bitc::VST_CODE_ENTRY));
872 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed,
873 Log2_32_Ceil(VE.getTypes().size()+1)));
874 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
875 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 7));
876 unsigned V7Abbrev = Stream.EmitAbbrev(Abbv);
878 SmallVector<unsigned, 64> NameVals;
880 for (TypeSymbolTable::const_iterator TI = TST.begin(), TE = TST.end();
882 // TST_ENTRY: [typeid, namechar x N]
883 NameVals.push_back(VE.getTypeID(TI->second));
885 const std::string &Str = TI->first;
887 for (unsigned i = 0, e = Str.size(); i != e; ++i) {
888 NameVals.push_back((unsigned char)Str[i]);
893 // Emit the finished record.
894 Stream.EmitRecord(bitc::VST_CODE_ENTRY, NameVals, is7Bit ? V7Abbrev : 0);
901 // Emit blockinfo, which defines the standard abbreviations etc.
902 static void WriteBlockInfo(const ValueEnumerator &VE, BitstreamWriter &Stream) {
903 // We only want to emit block info records for blocks that have multiple
904 // instances: CONSTANTS_BLOCK, FUNCTION_BLOCK and VALUE_SYMTAB_BLOCK. Other
905 // blocks can defined their abbrevs inline.
906 Stream.EnterBlockInfoBlock(2);
908 { // 8-bit fixed-width VST_ENTRY/VST_BBENTRY strings.
909 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
910 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 3));
911 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8));
912 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
913 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 8));
914 if (Stream.EmitBlockInfoAbbrev(bitc::VALUE_SYMTAB_BLOCK_ID,
915 Abbv) != VST_ENTRY_8_ABBREV)
916 assert(0 && "Unexpected abbrev ordering!");
919 { // 7-bit fixed width VST_ENTRY strings.
920 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
921 Abbv->Add(BitCodeAbbrevOp(bitc::VST_CODE_ENTRY));
922 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8));
923 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
924 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 7));
925 if (Stream.EmitBlockInfoAbbrev(bitc::VALUE_SYMTAB_BLOCK_ID,
926 Abbv) != VST_ENTRY_7_ABBREV)
927 assert(0 && "Unexpected abbrev ordering!");
929 { // 6-bit char6 VST_ENTRY strings.
930 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
931 Abbv->Add(BitCodeAbbrevOp(bitc::VST_CODE_ENTRY));
932 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8));
933 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
934 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Char6));
935 if (Stream.EmitBlockInfoAbbrev(bitc::VALUE_SYMTAB_BLOCK_ID,
936 Abbv) != VST_ENTRY_6_ABBREV)
937 assert(0 && "Unexpected abbrev ordering!");
939 { // 6-bit char6 VST_BBENTRY strings.
940 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
941 Abbv->Add(BitCodeAbbrevOp(bitc::VST_CODE_BBENTRY));
942 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8));
943 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
944 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Char6));
945 if (Stream.EmitBlockInfoAbbrev(bitc::VALUE_SYMTAB_BLOCK_ID,
946 Abbv) != VST_BBENTRY_6_ABBREV)
947 assert(0 && "Unexpected abbrev ordering!");
950 { // SETTYPE abbrev for CONSTANTS_BLOCK.
951 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
952 Abbv->Add(BitCodeAbbrevOp(bitc::CST_CODE_SETTYPE));
953 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed,
954 Log2_32_Ceil(VE.getTypes().size()+1)));
955 if (Stream.EmitBlockInfoAbbrev(bitc::CONSTANTS_BLOCK_ID,
956 Abbv) != CONSTANTS_SETTYPE_ABBREV)
957 assert(0 && "Unexpected abbrev ordering!");
960 { // INTEGER abbrev for CONSTANTS_BLOCK.
961 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
962 Abbv->Add(BitCodeAbbrevOp(bitc::CST_CODE_INTEGER));
963 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8));
964 if (Stream.EmitBlockInfoAbbrev(bitc::CONSTANTS_BLOCK_ID,
965 Abbv) != CONSTANTS_INTEGER_ABBREV)
966 assert(0 && "Unexpected abbrev ordering!");
969 { // CE_CAST abbrev for CONSTANTS_BLOCK.
970 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
971 Abbv->Add(BitCodeAbbrevOp(bitc::CST_CODE_CE_CAST));
972 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 4)); // cast opc
973 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, // typeid
974 Log2_32_Ceil(VE.getTypes().size()+1)));
975 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8)); // value id
977 if (Stream.EmitBlockInfoAbbrev(bitc::CONSTANTS_BLOCK_ID,
978 Abbv) != CONSTANTS_CE_CAST_Abbrev)
979 assert(0 && "Unexpected abbrev ordering!");
981 { // NULL abbrev for CONSTANTS_BLOCK.
982 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
983 Abbv->Add(BitCodeAbbrevOp(bitc::CST_CODE_NULL));
984 if (Stream.EmitBlockInfoAbbrev(bitc::CONSTANTS_BLOCK_ID,
985 Abbv) != CONSTANTS_NULL_Abbrev)
986 assert(0 && "Unexpected abbrev ordering!");
993 /// WriteModule - Emit the specified module to the bitstream.
994 static void WriteModule(const Module *M, BitstreamWriter &Stream) {
995 Stream.EnterSubblock(bitc::MODULE_BLOCK_ID, 3);
997 // Emit the version number if it is non-zero.
999 SmallVector<unsigned, 1> Vals;
1000 Vals.push_back(CurVersion);
1001 Stream.EmitRecord(bitc::MODULE_CODE_VERSION, Vals);
1004 // Analyze the module, enumerating globals, functions, etc.
1005 ValueEnumerator VE(M);
1007 // Emit blockinfo, which defines the standard abbreviations etc.
1008 WriteBlockInfo(VE, Stream);
1010 // Emit information about parameter attributes.
1011 WriteParamAttrTable(VE, Stream);
1013 // Emit information describing all of the types in the module.
1014 WriteTypeTable(VE, Stream);
1016 // Emit top-level description of module, including target triple, inline asm,
1017 // descriptors for global variables, and function prototype info.
1018 WriteModuleInfo(M, VE, Stream);
1021 WriteModuleConstants(VE, Stream);
1023 // If we have any aggregate values in the value table, purge them - these can
1024 // only be used to initialize global variables. Doing so makes the value
1025 // namespace smaller for code in functions.
1026 int NumNonAggregates = VE.PurgeAggregateValues();
1027 if (NumNonAggregates != -1) {
1028 SmallVector<unsigned, 1> Vals;
1029 Vals.push_back(NumNonAggregates);
1030 Stream.EmitRecord(bitc::MODULE_CODE_PURGEVALS, Vals);
1033 // Emit function bodies.
1034 for (Module::const_iterator I = M->begin(), E = M->end(); I != E; ++I)
1035 if (!I->isDeclaration())
1036 WriteFunction(*I, VE, Stream);
1038 // Emit the type symbol table information.
1039 WriteTypeSymbolTable(M->getTypeSymbolTable(), VE, Stream);
1041 // Emit names for globals/functions etc.
1042 WriteValueSymbolTable(M->getValueSymbolTable(), VE, Stream);
1048 /// WriteBitcodeToFile - Write the specified module to the specified output
1050 void llvm::WriteBitcodeToFile(const Module *M, std::ostream &Out) {
1051 std::vector<unsigned char> Buffer;
1052 BitstreamWriter Stream(Buffer);
1054 Buffer.reserve(256*1024);
1056 // Emit the file header.
1057 Stream.Emit((unsigned)'B', 8);
1058 Stream.Emit((unsigned)'C', 8);
1059 Stream.Emit(0x0, 4);
1060 Stream.Emit(0xC, 4);
1061 Stream.Emit(0xE, 4);
1062 Stream.Emit(0xD, 4);
1065 WriteModule(M, Stream);
1067 // Write the generated bitstream to "Out".
1068 Out.write((char*)&Buffer.front(), Buffer.size());