1 //===--- Bitcode/Writer/BitcodeWriter.cpp - Bitcode Writer ----------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // Bitcode writer implementation.
12 //===----------------------------------------------------------------------===//
14 #include "llvm/Bitcode/ReaderWriter.h"
15 #include "ValueEnumerator.h"
16 #include "llvm/ADT/Triple.h"
17 #include "llvm/Bitcode/BitstreamWriter.h"
18 #include "llvm/Bitcode/LLVMBitCodes.h"
19 #include "llvm/IR/Constants.h"
20 #include "llvm/IR/DebugInfoMetadata.h"
21 #include "llvm/IR/DerivedTypes.h"
22 #include "llvm/IR/InlineAsm.h"
23 #include "llvm/IR/Instructions.h"
24 #include "llvm/IR/Module.h"
25 #include "llvm/IR/Operator.h"
26 #include "llvm/IR/UseListOrder.h"
27 #include "llvm/IR/ValueSymbolTable.h"
28 #include "llvm/Support/CommandLine.h"
29 #include "llvm/Support/ErrorHandling.h"
30 #include "llvm/Support/MathExtras.h"
31 #include "llvm/Support/Program.h"
32 #include "llvm/Support/raw_ostream.h"
37 /// These are manifest constants used by the bitcode writer. They do not need to
38 /// be kept in sync with the reader, but need to be consistent within this file.
40 // VALUE_SYMTAB_BLOCK abbrev id's.
41 VST_ENTRY_8_ABBREV = bitc::FIRST_APPLICATION_ABBREV,
46 // CONSTANTS_BLOCK abbrev id's.
47 CONSTANTS_SETTYPE_ABBREV = bitc::FIRST_APPLICATION_ABBREV,
48 CONSTANTS_INTEGER_ABBREV,
49 CONSTANTS_CE_CAST_Abbrev,
50 CONSTANTS_NULL_Abbrev,
52 // FUNCTION_BLOCK abbrev id's.
53 FUNCTION_INST_LOAD_ABBREV = bitc::FIRST_APPLICATION_ABBREV,
54 FUNCTION_INST_BINOP_ABBREV,
55 FUNCTION_INST_BINOP_FLAGS_ABBREV,
56 FUNCTION_INST_CAST_ABBREV,
57 FUNCTION_INST_RET_VOID_ABBREV,
58 FUNCTION_INST_RET_VAL_ABBREV,
59 FUNCTION_INST_UNREACHABLE_ABBREV
62 static unsigned GetEncodedCastOpcode(unsigned Opcode) {
64 default: llvm_unreachable("Unknown cast instruction!");
65 case Instruction::Trunc : return bitc::CAST_TRUNC;
66 case Instruction::ZExt : return bitc::CAST_ZEXT;
67 case Instruction::SExt : return bitc::CAST_SEXT;
68 case Instruction::FPToUI : return bitc::CAST_FPTOUI;
69 case Instruction::FPToSI : return bitc::CAST_FPTOSI;
70 case Instruction::UIToFP : return bitc::CAST_UITOFP;
71 case Instruction::SIToFP : return bitc::CAST_SITOFP;
72 case Instruction::FPTrunc : return bitc::CAST_FPTRUNC;
73 case Instruction::FPExt : return bitc::CAST_FPEXT;
74 case Instruction::PtrToInt: return bitc::CAST_PTRTOINT;
75 case Instruction::IntToPtr: return bitc::CAST_INTTOPTR;
76 case Instruction::BitCast : return bitc::CAST_BITCAST;
77 case Instruction::AddrSpaceCast: return bitc::CAST_ADDRSPACECAST;
81 static unsigned GetEncodedBinaryOpcode(unsigned Opcode) {
83 default: llvm_unreachable("Unknown binary instruction!");
84 case Instruction::Add:
85 case Instruction::FAdd: return bitc::BINOP_ADD;
86 case Instruction::Sub:
87 case Instruction::FSub: return bitc::BINOP_SUB;
88 case Instruction::Mul:
89 case Instruction::FMul: return bitc::BINOP_MUL;
90 case Instruction::UDiv: return bitc::BINOP_UDIV;
91 case Instruction::FDiv:
92 case Instruction::SDiv: return bitc::BINOP_SDIV;
93 case Instruction::URem: return bitc::BINOP_UREM;
94 case Instruction::FRem:
95 case Instruction::SRem: return bitc::BINOP_SREM;
96 case Instruction::Shl: return bitc::BINOP_SHL;
97 case Instruction::LShr: return bitc::BINOP_LSHR;
98 case Instruction::AShr: return bitc::BINOP_ASHR;
99 case Instruction::And: return bitc::BINOP_AND;
100 case Instruction::Or: return bitc::BINOP_OR;
101 case Instruction::Xor: return bitc::BINOP_XOR;
105 static unsigned GetEncodedRMWOperation(AtomicRMWInst::BinOp Op) {
107 default: llvm_unreachable("Unknown RMW operation!");
108 case AtomicRMWInst::Xchg: return bitc::RMW_XCHG;
109 case AtomicRMWInst::Add: return bitc::RMW_ADD;
110 case AtomicRMWInst::Sub: return bitc::RMW_SUB;
111 case AtomicRMWInst::And: return bitc::RMW_AND;
112 case AtomicRMWInst::Nand: return bitc::RMW_NAND;
113 case AtomicRMWInst::Or: return bitc::RMW_OR;
114 case AtomicRMWInst::Xor: return bitc::RMW_XOR;
115 case AtomicRMWInst::Max: return bitc::RMW_MAX;
116 case AtomicRMWInst::Min: return bitc::RMW_MIN;
117 case AtomicRMWInst::UMax: return bitc::RMW_UMAX;
118 case AtomicRMWInst::UMin: return bitc::RMW_UMIN;
122 static unsigned GetEncodedOrdering(AtomicOrdering Ordering) {
124 case NotAtomic: return bitc::ORDERING_NOTATOMIC;
125 case Unordered: return bitc::ORDERING_UNORDERED;
126 case Monotonic: return bitc::ORDERING_MONOTONIC;
127 case Acquire: return bitc::ORDERING_ACQUIRE;
128 case Release: return bitc::ORDERING_RELEASE;
129 case AcquireRelease: return bitc::ORDERING_ACQREL;
130 case SequentiallyConsistent: return bitc::ORDERING_SEQCST;
132 llvm_unreachable("Invalid ordering");
135 static unsigned GetEncodedSynchScope(SynchronizationScope SynchScope) {
136 switch (SynchScope) {
137 case SingleThread: return bitc::SYNCHSCOPE_SINGLETHREAD;
138 case CrossThread: return bitc::SYNCHSCOPE_CROSSTHREAD;
140 llvm_unreachable("Invalid synch scope");
143 static void WriteStringRecord(unsigned Code, StringRef Str,
144 unsigned AbbrevToUse, BitstreamWriter &Stream) {
145 SmallVector<unsigned, 64> Vals;
147 // Code: [strchar x N]
148 for (unsigned i = 0, e = Str.size(); i != e; ++i) {
149 if (AbbrevToUse && !BitCodeAbbrevOp::isChar6(Str[i]))
151 Vals.push_back(Str[i]);
154 // Emit the finished record.
155 Stream.EmitRecord(Code, Vals, AbbrevToUse);
158 static uint64_t getAttrKindEncoding(Attribute::AttrKind Kind) {
160 case Attribute::Alignment:
161 return bitc::ATTR_KIND_ALIGNMENT;
162 case Attribute::AlwaysInline:
163 return bitc::ATTR_KIND_ALWAYS_INLINE;
164 case Attribute::Builtin:
165 return bitc::ATTR_KIND_BUILTIN;
166 case Attribute::ByVal:
167 return bitc::ATTR_KIND_BY_VAL;
168 case Attribute::InAlloca:
169 return bitc::ATTR_KIND_IN_ALLOCA;
170 case Attribute::Cold:
171 return bitc::ATTR_KIND_COLD;
172 case Attribute::InlineHint:
173 return bitc::ATTR_KIND_INLINE_HINT;
174 case Attribute::InReg:
175 return bitc::ATTR_KIND_IN_REG;
176 case Attribute::JumpTable:
177 return bitc::ATTR_KIND_JUMP_TABLE;
178 case Attribute::MinSize:
179 return bitc::ATTR_KIND_MIN_SIZE;
180 case Attribute::Naked:
181 return bitc::ATTR_KIND_NAKED;
182 case Attribute::Nest:
183 return bitc::ATTR_KIND_NEST;
184 case Attribute::NoAlias:
185 return bitc::ATTR_KIND_NO_ALIAS;
186 case Attribute::NoBuiltin:
187 return bitc::ATTR_KIND_NO_BUILTIN;
188 case Attribute::NoCapture:
189 return bitc::ATTR_KIND_NO_CAPTURE;
190 case Attribute::NoDuplicate:
191 return bitc::ATTR_KIND_NO_DUPLICATE;
192 case Attribute::NoImplicitFloat:
193 return bitc::ATTR_KIND_NO_IMPLICIT_FLOAT;
194 case Attribute::NoInline:
195 return bitc::ATTR_KIND_NO_INLINE;
196 case Attribute::NonLazyBind:
197 return bitc::ATTR_KIND_NON_LAZY_BIND;
198 case Attribute::NonNull:
199 return bitc::ATTR_KIND_NON_NULL;
200 case Attribute::Dereferenceable:
201 return bitc::ATTR_KIND_DEREFERENCEABLE;
202 case Attribute::NoRedZone:
203 return bitc::ATTR_KIND_NO_RED_ZONE;
204 case Attribute::NoReturn:
205 return bitc::ATTR_KIND_NO_RETURN;
206 case Attribute::NoUnwind:
207 return bitc::ATTR_KIND_NO_UNWIND;
208 case Attribute::OptimizeForSize:
209 return bitc::ATTR_KIND_OPTIMIZE_FOR_SIZE;
210 case Attribute::OptimizeNone:
211 return bitc::ATTR_KIND_OPTIMIZE_NONE;
212 case Attribute::ReadNone:
213 return bitc::ATTR_KIND_READ_NONE;
214 case Attribute::ReadOnly:
215 return bitc::ATTR_KIND_READ_ONLY;
216 case Attribute::Returned:
217 return bitc::ATTR_KIND_RETURNED;
218 case Attribute::ReturnsTwice:
219 return bitc::ATTR_KIND_RETURNS_TWICE;
220 case Attribute::SExt:
221 return bitc::ATTR_KIND_S_EXT;
222 case Attribute::StackAlignment:
223 return bitc::ATTR_KIND_STACK_ALIGNMENT;
224 case Attribute::StackProtect:
225 return bitc::ATTR_KIND_STACK_PROTECT;
226 case Attribute::StackProtectReq:
227 return bitc::ATTR_KIND_STACK_PROTECT_REQ;
228 case Attribute::StackProtectStrong:
229 return bitc::ATTR_KIND_STACK_PROTECT_STRONG;
230 case Attribute::StructRet:
231 return bitc::ATTR_KIND_STRUCT_RET;
232 case Attribute::SanitizeAddress:
233 return bitc::ATTR_KIND_SANITIZE_ADDRESS;
234 case Attribute::SanitizeThread:
235 return bitc::ATTR_KIND_SANITIZE_THREAD;
236 case Attribute::SanitizeMemory:
237 return bitc::ATTR_KIND_SANITIZE_MEMORY;
238 case Attribute::UWTable:
239 return bitc::ATTR_KIND_UW_TABLE;
240 case Attribute::ZExt:
241 return bitc::ATTR_KIND_Z_EXT;
242 case Attribute::EndAttrKinds:
243 llvm_unreachable("Can not encode end-attribute kinds marker.");
244 case Attribute::None:
245 llvm_unreachable("Can not encode none-attribute.");
248 llvm_unreachable("Trying to encode unknown attribute");
251 static void WriteAttributeGroupTable(const ValueEnumerator &VE,
252 BitstreamWriter &Stream) {
253 const std::vector<AttributeSet> &AttrGrps = VE.getAttributeGroups();
254 if (AttrGrps.empty()) return;
256 Stream.EnterSubblock(bitc::PARAMATTR_GROUP_BLOCK_ID, 3);
258 SmallVector<uint64_t, 64> Record;
259 for (unsigned i = 0, e = AttrGrps.size(); i != e; ++i) {
260 AttributeSet AS = AttrGrps[i];
261 for (unsigned i = 0, e = AS.getNumSlots(); i != e; ++i) {
262 AttributeSet A = AS.getSlotAttributes(i);
264 Record.push_back(VE.getAttributeGroupID(A));
265 Record.push_back(AS.getSlotIndex(i));
267 for (AttributeSet::iterator I = AS.begin(0), E = AS.end(0);
270 if (Attr.isEnumAttribute()) {
272 Record.push_back(getAttrKindEncoding(Attr.getKindAsEnum()));
273 } else if (Attr.isIntAttribute()) {
275 Record.push_back(getAttrKindEncoding(Attr.getKindAsEnum()));
276 Record.push_back(Attr.getValueAsInt());
278 StringRef Kind = Attr.getKindAsString();
279 StringRef Val = Attr.getValueAsString();
281 Record.push_back(Val.empty() ? 3 : 4);
282 Record.append(Kind.begin(), Kind.end());
285 Record.append(Val.begin(), Val.end());
291 Stream.EmitRecord(bitc::PARAMATTR_GRP_CODE_ENTRY, Record);
299 static void WriteAttributeTable(const ValueEnumerator &VE,
300 BitstreamWriter &Stream) {
301 const std::vector<AttributeSet> &Attrs = VE.getAttributes();
302 if (Attrs.empty()) return;
304 Stream.EnterSubblock(bitc::PARAMATTR_BLOCK_ID, 3);
306 SmallVector<uint64_t, 64> Record;
307 for (unsigned i = 0, e = Attrs.size(); i != e; ++i) {
308 const AttributeSet &A = Attrs[i];
309 for (unsigned i = 0, e = A.getNumSlots(); i != e; ++i)
310 Record.push_back(VE.getAttributeGroupID(A.getSlotAttributes(i)));
312 Stream.EmitRecord(bitc::PARAMATTR_CODE_ENTRY, Record);
319 /// WriteTypeTable - Write out the type table for a module.
320 static void WriteTypeTable(const ValueEnumerator &VE, BitstreamWriter &Stream) {
321 const ValueEnumerator::TypeList &TypeList = VE.getTypes();
323 Stream.EnterSubblock(bitc::TYPE_BLOCK_ID_NEW, 4 /*count from # abbrevs */);
324 SmallVector<uint64_t, 64> TypeVals;
326 uint64_t NumBits = Log2_32_Ceil(VE.getTypes().size()+1);
328 // Abbrev for TYPE_CODE_POINTER.
329 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
330 Abbv->Add(BitCodeAbbrevOp(bitc::TYPE_CODE_POINTER));
331 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, NumBits));
332 Abbv->Add(BitCodeAbbrevOp(0)); // Addrspace = 0
333 unsigned PtrAbbrev = Stream.EmitAbbrev(Abbv);
335 // Abbrev for TYPE_CODE_FUNCTION.
336 Abbv = new BitCodeAbbrev();
337 Abbv->Add(BitCodeAbbrevOp(bitc::TYPE_CODE_FUNCTION));
338 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // isvararg
339 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
340 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, NumBits));
342 unsigned FunctionAbbrev = Stream.EmitAbbrev(Abbv);
344 // Abbrev for TYPE_CODE_STRUCT_ANON.
345 Abbv = new BitCodeAbbrev();
346 Abbv->Add(BitCodeAbbrevOp(bitc::TYPE_CODE_STRUCT_ANON));
347 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // ispacked
348 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
349 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, NumBits));
351 unsigned StructAnonAbbrev = Stream.EmitAbbrev(Abbv);
353 // Abbrev for TYPE_CODE_STRUCT_NAME.
354 Abbv = new BitCodeAbbrev();
355 Abbv->Add(BitCodeAbbrevOp(bitc::TYPE_CODE_STRUCT_NAME));
356 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
357 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Char6));
358 unsigned StructNameAbbrev = Stream.EmitAbbrev(Abbv);
360 // Abbrev for TYPE_CODE_STRUCT_NAMED.
361 Abbv = new BitCodeAbbrev();
362 Abbv->Add(BitCodeAbbrevOp(bitc::TYPE_CODE_STRUCT_NAMED));
363 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // ispacked
364 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
365 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, NumBits));
367 unsigned StructNamedAbbrev = Stream.EmitAbbrev(Abbv);
369 // Abbrev for TYPE_CODE_ARRAY.
370 Abbv = new BitCodeAbbrev();
371 Abbv->Add(BitCodeAbbrevOp(bitc::TYPE_CODE_ARRAY));
372 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8)); // size
373 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, NumBits));
375 unsigned ArrayAbbrev = Stream.EmitAbbrev(Abbv);
377 // Emit an entry count so the reader can reserve space.
378 TypeVals.push_back(TypeList.size());
379 Stream.EmitRecord(bitc::TYPE_CODE_NUMENTRY, TypeVals);
382 // Loop over all of the types, emitting each in turn.
383 for (unsigned i = 0, e = TypeList.size(); i != e; ++i) {
384 Type *T = TypeList[i];
388 switch (T->getTypeID()) {
389 case Type::VoidTyID: Code = bitc::TYPE_CODE_VOID; break;
390 case Type::HalfTyID: Code = bitc::TYPE_CODE_HALF; break;
391 case Type::FloatTyID: Code = bitc::TYPE_CODE_FLOAT; break;
392 case Type::DoubleTyID: Code = bitc::TYPE_CODE_DOUBLE; break;
393 case Type::X86_FP80TyID: Code = bitc::TYPE_CODE_X86_FP80; break;
394 case Type::FP128TyID: Code = bitc::TYPE_CODE_FP128; break;
395 case Type::PPC_FP128TyID: Code = bitc::TYPE_CODE_PPC_FP128; break;
396 case Type::LabelTyID: Code = bitc::TYPE_CODE_LABEL; break;
397 case Type::MetadataTyID: Code = bitc::TYPE_CODE_METADATA; break;
398 case Type::X86_MMXTyID: Code = bitc::TYPE_CODE_X86_MMX; break;
399 case Type::IntegerTyID:
401 Code = bitc::TYPE_CODE_INTEGER;
402 TypeVals.push_back(cast<IntegerType>(T)->getBitWidth());
404 case Type::PointerTyID: {
405 PointerType *PTy = cast<PointerType>(T);
406 // POINTER: [pointee type, address space]
407 Code = bitc::TYPE_CODE_POINTER;
408 TypeVals.push_back(VE.getTypeID(PTy->getElementType()));
409 unsigned AddressSpace = PTy->getAddressSpace();
410 TypeVals.push_back(AddressSpace);
411 if (AddressSpace == 0) AbbrevToUse = PtrAbbrev;
414 case Type::FunctionTyID: {
415 FunctionType *FT = cast<FunctionType>(T);
416 // FUNCTION: [isvararg, retty, paramty x N]
417 Code = bitc::TYPE_CODE_FUNCTION;
418 TypeVals.push_back(FT->isVarArg());
419 TypeVals.push_back(VE.getTypeID(FT->getReturnType()));
420 for (unsigned i = 0, e = FT->getNumParams(); i != e; ++i)
421 TypeVals.push_back(VE.getTypeID(FT->getParamType(i)));
422 AbbrevToUse = FunctionAbbrev;
425 case Type::StructTyID: {
426 StructType *ST = cast<StructType>(T);
427 // STRUCT: [ispacked, eltty x N]
428 TypeVals.push_back(ST->isPacked());
429 // Output all of the element types.
430 for (StructType::element_iterator I = ST->element_begin(),
431 E = ST->element_end(); I != E; ++I)
432 TypeVals.push_back(VE.getTypeID(*I));
434 if (ST->isLiteral()) {
435 Code = bitc::TYPE_CODE_STRUCT_ANON;
436 AbbrevToUse = StructAnonAbbrev;
438 if (ST->isOpaque()) {
439 Code = bitc::TYPE_CODE_OPAQUE;
441 Code = bitc::TYPE_CODE_STRUCT_NAMED;
442 AbbrevToUse = StructNamedAbbrev;
445 // Emit the name if it is present.
446 if (!ST->getName().empty())
447 WriteStringRecord(bitc::TYPE_CODE_STRUCT_NAME, ST->getName(),
448 StructNameAbbrev, Stream);
452 case Type::ArrayTyID: {
453 ArrayType *AT = cast<ArrayType>(T);
454 // ARRAY: [numelts, eltty]
455 Code = bitc::TYPE_CODE_ARRAY;
456 TypeVals.push_back(AT->getNumElements());
457 TypeVals.push_back(VE.getTypeID(AT->getElementType()));
458 AbbrevToUse = ArrayAbbrev;
461 case Type::VectorTyID: {
462 VectorType *VT = cast<VectorType>(T);
463 // VECTOR [numelts, eltty]
464 Code = bitc::TYPE_CODE_VECTOR;
465 TypeVals.push_back(VT->getNumElements());
466 TypeVals.push_back(VE.getTypeID(VT->getElementType()));
471 // Emit the finished record.
472 Stream.EmitRecord(Code, TypeVals, AbbrevToUse);
479 static unsigned getEncodedLinkage(const GlobalValue &GV) {
480 switch (GV.getLinkage()) {
481 case GlobalValue::ExternalLinkage:
483 case GlobalValue::WeakAnyLinkage:
485 case GlobalValue::AppendingLinkage:
487 case GlobalValue::InternalLinkage:
489 case GlobalValue::LinkOnceAnyLinkage:
491 case GlobalValue::ExternalWeakLinkage:
493 case GlobalValue::CommonLinkage:
495 case GlobalValue::PrivateLinkage:
497 case GlobalValue::WeakODRLinkage:
499 case GlobalValue::LinkOnceODRLinkage:
501 case GlobalValue::AvailableExternallyLinkage:
504 llvm_unreachable("Invalid linkage");
507 static unsigned getEncodedVisibility(const GlobalValue &GV) {
508 switch (GV.getVisibility()) {
509 case GlobalValue::DefaultVisibility: return 0;
510 case GlobalValue::HiddenVisibility: return 1;
511 case GlobalValue::ProtectedVisibility: return 2;
513 llvm_unreachable("Invalid visibility");
516 static unsigned getEncodedDLLStorageClass(const GlobalValue &GV) {
517 switch (GV.getDLLStorageClass()) {
518 case GlobalValue::DefaultStorageClass: return 0;
519 case GlobalValue::DLLImportStorageClass: return 1;
520 case GlobalValue::DLLExportStorageClass: return 2;
522 llvm_unreachable("Invalid DLL storage class");
525 static unsigned getEncodedThreadLocalMode(const GlobalValue &GV) {
526 switch (GV.getThreadLocalMode()) {
527 case GlobalVariable::NotThreadLocal: return 0;
528 case GlobalVariable::GeneralDynamicTLSModel: return 1;
529 case GlobalVariable::LocalDynamicTLSModel: return 2;
530 case GlobalVariable::InitialExecTLSModel: return 3;
531 case GlobalVariable::LocalExecTLSModel: return 4;
533 llvm_unreachable("Invalid TLS model");
536 static unsigned getEncodedComdatSelectionKind(const Comdat &C) {
537 switch (C.getSelectionKind()) {
539 return bitc::COMDAT_SELECTION_KIND_ANY;
540 case Comdat::ExactMatch:
541 return bitc::COMDAT_SELECTION_KIND_EXACT_MATCH;
542 case Comdat::Largest:
543 return bitc::COMDAT_SELECTION_KIND_LARGEST;
544 case Comdat::NoDuplicates:
545 return bitc::COMDAT_SELECTION_KIND_NO_DUPLICATES;
546 case Comdat::SameSize:
547 return bitc::COMDAT_SELECTION_KIND_SAME_SIZE;
549 llvm_unreachable("Invalid selection kind");
552 static void writeComdats(const ValueEnumerator &VE, BitstreamWriter &Stream) {
553 SmallVector<uint16_t, 64> Vals;
554 for (const Comdat *C : VE.getComdats()) {
555 // COMDAT: [selection_kind, name]
556 Vals.push_back(getEncodedComdatSelectionKind(*C));
557 size_t Size = C->getName().size();
558 assert(isUInt<16>(Size));
559 Vals.push_back(Size);
560 for (char Chr : C->getName())
561 Vals.push_back((unsigned char)Chr);
562 Stream.EmitRecord(bitc::MODULE_CODE_COMDAT, Vals, /*AbbrevToUse=*/0);
567 // Emit top-level description of module, including target triple, inline asm,
568 // descriptors for global variables, and function prototype info.
569 static void WriteModuleInfo(const Module *M, const ValueEnumerator &VE,
570 BitstreamWriter &Stream) {
571 // Emit various pieces of data attached to a module.
572 if (!M->getTargetTriple().empty())
573 WriteStringRecord(bitc::MODULE_CODE_TRIPLE, M->getTargetTriple(),
575 const std::string &DL = M->getDataLayoutStr();
577 WriteStringRecord(bitc::MODULE_CODE_DATALAYOUT, DL, 0 /*TODO*/, Stream);
578 if (!M->getModuleInlineAsm().empty())
579 WriteStringRecord(bitc::MODULE_CODE_ASM, M->getModuleInlineAsm(),
582 // Emit information about sections and GC, computing how many there are. Also
583 // compute the maximum alignment value.
584 std::map<std::string, unsigned> SectionMap;
585 std::map<std::string, unsigned> GCMap;
586 unsigned MaxAlignment = 0;
587 unsigned MaxGlobalType = 0;
588 for (const GlobalValue &GV : M->globals()) {
589 MaxAlignment = std::max(MaxAlignment, GV.getAlignment());
590 MaxGlobalType = std::max(MaxGlobalType, VE.getTypeID(GV.getType()));
591 if (GV.hasSection()) {
592 // Give section names unique ID's.
593 unsigned &Entry = SectionMap[GV.getSection()];
595 WriteStringRecord(bitc::MODULE_CODE_SECTIONNAME, GV.getSection(),
597 Entry = SectionMap.size();
601 for (const Function &F : *M) {
602 MaxAlignment = std::max(MaxAlignment, F.getAlignment());
603 if (F.hasSection()) {
604 // Give section names unique ID's.
605 unsigned &Entry = SectionMap[F.getSection()];
607 WriteStringRecord(bitc::MODULE_CODE_SECTIONNAME, F.getSection(),
609 Entry = SectionMap.size();
613 // Same for GC names.
614 unsigned &Entry = GCMap[F.getGC()];
616 WriteStringRecord(bitc::MODULE_CODE_GCNAME, F.getGC(),
618 Entry = GCMap.size();
623 // Emit abbrev for globals, now that we know # sections and max alignment.
624 unsigned SimpleGVarAbbrev = 0;
625 if (!M->global_empty()) {
626 // Add an abbrev for common globals with no visibility or thread localness.
627 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
628 Abbv->Add(BitCodeAbbrevOp(bitc::MODULE_CODE_GLOBALVAR));
629 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed,
630 Log2_32_Ceil(MaxGlobalType+1)));
631 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // Constant.
632 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Initializer.
633 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 5)); // Linkage.
634 if (MaxAlignment == 0) // Alignment.
635 Abbv->Add(BitCodeAbbrevOp(0));
637 unsigned MaxEncAlignment = Log2_32(MaxAlignment)+1;
638 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed,
639 Log2_32_Ceil(MaxEncAlignment+1)));
641 if (SectionMap.empty()) // Section.
642 Abbv->Add(BitCodeAbbrevOp(0));
644 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed,
645 Log2_32_Ceil(SectionMap.size()+1)));
646 // Don't bother emitting vis + thread local.
647 SimpleGVarAbbrev = Stream.EmitAbbrev(Abbv);
650 // Emit the global variable information.
651 SmallVector<unsigned, 64> Vals;
652 for (const GlobalVariable &GV : M->globals()) {
653 unsigned AbbrevToUse = 0;
655 // GLOBALVAR: [type, isconst, initid,
656 // linkage, alignment, section, visibility, threadlocal,
657 // unnamed_addr, externally_initialized, dllstorageclass,
659 Vals.push_back(VE.getTypeID(GV.getType()));
660 Vals.push_back(GV.isConstant());
661 Vals.push_back(GV.isDeclaration() ? 0 :
662 (VE.getValueID(GV.getInitializer()) + 1));
663 Vals.push_back(getEncodedLinkage(GV));
664 Vals.push_back(Log2_32(GV.getAlignment())+1);
665 Vals.push_back(GV.hasSection() ? SectionMap[GV.getSection()] : 0);
666 if (GV.isThreadLocal() ||
667 GV.getVisibility() != GlobalValue::DefaultVisibility ||
668 GV.hasUnnamedAddr() || GV.isExternallyInitialized() ||
669 GV.getDLLStorageClass() != GlobalValue::DefaultStorageClass ||
671 Vals.push_back(getEncodedVisibility(GV));
672 Vals.push_back(getEncodedThreadLocalMode(GV));
673 Vals.push_back(GV.hasUnnamedAddr());
674 Vals.push_back(GV.isExternallyInitialized());
675 Vals.push_back(getEncodedDLLStorageClass(GV));
676 Vals.push_back(GV.hasComdat() ? VE.getComdatID(GV.getComdat()) : 0);
678 AbbrevToUse = SimpleGVarAbbrev;
681 Stream.EmitRecord(bitc::MODULE_CODE_GLOBALVAR, Vals, AbbrevToUse);
685 // Emit the function proto information.
686 for (const Function &F : *M) {
687 // FUNCTION: [type, callingconv, isproto, linkage, paramattrs, alignment,
688 // section, visibility, gc, unnamed_addr, prologuedata,
689 // dllstorageclass, comdat, prefixdata]
690 Vals.push_back(VE.getTypeID(F.getType()));
691 Vals.push_back(F.getCallingConv());
692 Vals.push_back(F.isDeclaration());
693 Vals.push_back(getEncodedLinkage(F));
694 Vals.push_back(VE.getAttributeID(F.getAttributes()));
695 Vals.push_back(Log2_32(F.getAlignment())+1);
696 Vals.push_back(F.hasSection() ? SectionMap[F.getSection()] : 0);
697 Vals.push_back(getEncodedVisibility(F));
698 Vals.push_back(F.hasGC() ? GCMap[F.getGC()] : 0);
699 Vals.push_back(F.hasUnnamedAddr());
700 Vals.push_back(F.hasPrologueData() ? (VE.getValueID(F.getPrologueData()) + 1)
702 Vals.push_back(getEncodedDLLStorageClass(F));
703 Vals.push_back(F.hasComdat() ? VE.getComdatID(F.getComdat()) : 0);
704 Vals.push_back(F.hasPrefixData() ? (VE.getValueID(F.getPrefixData()) + 1)
707 unsigned AbbrevToUse = 0;
708 Stream.EmitRecord(bitc::MODULE_CODE_FUNCTION, Vals, AbbrevToUse);
712 // Emit the alias information.
713 for (const GlobalAlias &A : M->aliases()) {
714 // ALIAS: [alias type, aliasee val#, linkage, visibility]
715 Vals.push_back(VE.getTypeID(A.getType()));
716 Vals.push_back(VE.getValueID(A.getAliasee()));
717 Vals.push_back(getEncodedLinkage(A));
718 Vals.push_back(getEncodedVisibility(A));
719 Vals.push_back(getEncodedDLLStorageClass(A));
720 Vals.push_back(getEncodedThreadLocalMode(A));
721 Vals.push_back(A.hasUnnamedAddr());
722 unsigned AbbrevToUse = 0;
723 Stream.EmitRecord(bitc::MODULE_CODE_ALIAS, Vals, AbbrevToUse);
728 static uint64_t GetOptimizationFlags(const Value *V) {
731 if (const auto *OBO = dyn_cast<OverflowingBinaryOperator>(V)) {
732 if (OBO->hasNoSignedWrap())
733 Flags |= 1 << bitc::OBO_NO_SIGNED_WRAP;
734 if (OBO->hasNoUnsignedWrap())
735 Flags |= 1 << bitc::OBO_NO_UNSIGNED_WRAP;
736 } else if (const auto *PEO = dyn_cast<PossiblyExactOperator>(V)) {
738 Flags |= 1 << bitc::PEO_EXACT;
739 } else if (const auto *FPMO = dyn_cast<FPMathOperator>(V)) {
740 if (FPMO->hasUnsafeAlgebra())
741 Flags |= FastMathFlags::UnsafeAlgebra;
742 if (FPMO->hasNoNaNs())
743 Flags |= FastMathFlags::NoNaNs;
744 if (FPMO->hasNoInfs())
745 Flags |= FastMathFlags::NoInfs;
746 if (FPMO->hasNoSignedZeros())
747 Flags |= FastMathFlags::NoSignedZeros;
748 if (FPMO->hasAllowReciprocal())
749 Flags |= FastMathFlags::AllowReciprocal;
755 static void WriteValueAsMetadata(const ValueAsMetadata *MD,
756 const ValueEnumerator &VE,
757 BitstreamWriter &Stream,
758 SmallVectorImpl<uint64_t> &Record) {
759 // Mimic an MDNode with a value as one operand.
760 Value *V = MD->getValue();
761 Record.push_back(VE.getTypeID(V->getType()));
762 Record.push_back(VE.getValueID(V));
763 Stream.EmitRecord(bitc::METADATA_VALUE, Record, 0);
767 static void WriteMDTuple(const MDTuple *N, const ValueEnumerator &VE,
768 BitstreamWriter &Stream,
769 SmallVectorImpl<uint64_t> &Record, unsigned Abbrev) {
770 for (unsigned i = 0, e = N->getNumOperands(); i != e; ++i) {
771 Metadata *MD = N->getOperand(i);
772 assert(!(MD && isa<LocalAsMetadata>(MD)) &&
773 "Unexpected function-local metadata");
774 Record.push_back(VE.getMetadataOrNullID(MD));
776 Stream.EmitRecord(N->isDistinct() ? bitc::METADATA_DISTINCT_NODE
777 : bitc::METADATA_NODE,
782 static void WriteMDLocation(const MDLocation *N, const ValueEnumerator &VE,
783 BitstreamWriter &Stream,
784 SmallVectorImpl<uint64_t> &Record,
786 Record.push_back(N->isDistinct());
787 Record.push_back(N->getLine());
788 Record.push_back(N->getColumn());
789 Record.push_back(VE.getMetadataID(N->getScope()));
790 Record.push_back(VE.getMetadataOrNullID(N->getInlinedAt()));
792 Stream.EmitRecord(bitc::METADATA_LOCATION, Record, Abbrev);
796 static void WriteGenericDebugNode(const GenericDebugNode *N,
797 const ValueEnumerator &VE,
798 BitstreamWriter &Stream,
799 SmallVectorImpl<uint64_t> &Record,
801 Record.push_back(N->isDistinct());
802 Record.push_back(N->getTag());
803 Record.push_back(0); // Per-tag version field; unused for now.
805 for (auto &I : N->operands())
806 Record.push_back(VE.getMetadataOrNullID(I));
808 Stream.EmitRecord(bitc::METADATA_GENERIC_DEBUG, Record, Abbrev);
812 static uint64_t rotateSign(int64_t I) {
814 return I < 0 ? ~(U << 1) : U << 1;
817 static void WriteMDSubrange(const MDSubrange *N, const ValueEnumerator &,
818 BitstreamWriter &Stream,
819 SmallVectorImpl<uint64_t> &Record,
821 Record.push_back(N->isDistinct());
822 Record.push_back(N->getCount());
823 Record.push_back(rotateSign(N->getLo()));
825 Stream.EmitRecord(bitc::METADATA_SUBRANGE, Record, Abbrev);
829 static void WriteMDEnumerator(const MDEnumerator *N, const ValueEnumerator &VE,
830 BitstreamWriter &Stream,
831 SmallVectorImpl<uint64_t> &Record,
833 Record.push_back(N->isDistinct());
834 Record.push_back(rotateSign(N->getValue()));
835 Record.push_back(VE.getMetadataOrNullID(N->getRawName()));
837 Stream.EmitRecord(bitc::METADATA_ENUMERATOR, Record, Abbrev);
841 static void WriteMDBasicType(const MDBasicType *N, const ValueEnumerator &VE,
842 BitstreamWriter &Stream,
843 SmallVectorImpl<uint64_t> &Record,
845 Record.push_back(N->isDistinct());
846 Record.push_back(N->getTag());
847 Record.push_back(VE.getMetadataOrNullID(N->getRawName()));
848 Record.push_back(N->getSizeInBits());
849 Record.push_back(N->getAlignInBits());
850 Record.push_back(N->getEncoding());
852 Stream.EmitRecord(bitc::METADATA_BASIC_TYPE, Record, Abbrev);
856 static void WriteMDDerivedType(const MDDerivedType *N,
857 const ValueEnumerator &VE,
858 BitstreamWriter &Stream,
859 SmallVectorImpl<uint64_t> &Record,
861 Record.push_back(N->isDistinct());
862 Record.push_back(N->getTag());
863 Record.push_back(VE.getMetadataOrNullID(N->getRawName()));
864 Record.push_back(VE.getMetadataOrNullID(N->getFile()));
865 Record.push_back(N->getLine());
866 Record.push_back(VE.getMetadataOrNullID(N->getScope()));
867 Record.push_back(VE.getMetadataID(N->getBaseType()));
868 Record.push_back(N->getSizeInBits());
869 Record.push_back(N->getAlignInBits());
870 Record.push_back(N->getOffsetInBits());
871 Record.push_back(N->getFlags());
872 Record.push_back(VE.getMetadataOrNullID(N->getExtraData()));
874 Stream.EmitRecord(bitc::METADATA_DERIVED_TYPE, Record, Abbrev);
878 static void WriteMDCompositeType(const MDCompositeType *N,
879 const ValueEnumerator &VE,
880 BitstreamWriter &Stream,
881 SmallVectorImpl<uint64_t> &Record,
883 Record.push_back(N->isDistinct());
884 Record.push_back(N->getTag());
885 Record.push_back(VE.getMetadataOrNullID(N->getRawName()));
886 Record.push_back(VE.getMetadataOrNullID(N->getFile()));
887 Record.push_back(N->getLine());
888 Record.push_back(VE.getMetadataOrNullID(N->getScope()));
889 Record.push_back(VE.getMetadataOrNullID(N->getBaseType()));
890 Record.push_back(N->getSizeInBits());
891 Record.push_back(N->getAlignInBits());
892 Record.push_back(N->getOffsetInBits());
893 Record.push_back(N->getFlags());
894 Record.push_back(VE.getMetadataOrNullID(N->getElements()));
895 Record.push_back(N->getRuntimeLang());
896 Record.push_back(VE.getMetadataOrNullID(N->getVTableHolder()));
897 Record.push_back(VE.getMetadataOrNullID(N->getTemplateParams()));
898 Record.push_back(VE.getMetadataOrNullID(N->getRawIdentifier()));
900 Stream.EmitRecord(bitc::METADATA_COMPOSITE_TYPE, Record, Abbrev);
904 static void WriteMDSubroutineType(const MDSubroutineType *,
905 const ValueEnumerator &, BitstreamWriter &,
906 SmallVectorImpl<uint64_t> &, unsigned) {
907 llvm_unreachable("write not implemented");
910 static void WriteMDFile(const MDFile *N, const ValueEnumerator &VE,
911 BitstreamWriter &Stream,
912 SmallVectorImpl<uint64_t> &Record, unsigned Abbrev) {
913 Record.push_back(N->isDistinct());
914 Record.push_back(VE.getMetadataOrNullID(N->getRawFilename()));
915 Record.push_back(VE.getMetadataOrNullID(N->getRawDirectory()));
917 Stream.EmitRecord(bitc::METADATA_FILE, Record, Abbrev);
921 static void WriteMDCompileUnit(const MDCompileUnit *, const ValueEnumerator &,
922 BitstreamWriter &, SmallVectorImpl<uint64_t> &,
924 llvm_unreachable("write not implemented");
926 static void WriteMDSubprogram(const MDSubprogram *, const ValueEnumerator &,
927 BitstreamWriter &, SmallVectorImpl<uint64_t> &,
929 llvm_unreachable("write not implemented");
931 static void WriteMDLexicalBlock(const MDLexicalBlock *, const ValueEnumerator &,
932 BitstreamWriter &, SmallVectorImpl<uint64_t> &,
934 llvm_unreachable("write not implemented");
936 static void WriteMDLexicalBlockFile(const MDLexicalBlockFile *,
937 const ValueEnumerator &, BitstreamWriter &,
938 SmallVectorImpl<uint64_t> &, unsigned) {
939 llvm_unreachable("write not implemented");
941 static void WriteMDNamespace(const MDNamespace *, const ValueEnumerator &,
942 BitstreamWriter &, SmallVectorImpl<uint64_t> &,
944 llvm_unreachable("write not implemented");
946 static void WriteMDTemplateTypeParameter(const MDTemplateTypeParameter *,
947 const ValueEnumerator &,
949 SmallVectorImpl<uint64_t> &,
951 llvm_unreachable("write not implemented");
953 static void WriteMDTemplateValueParameter(const MDTemplateValueParameter *,
954 const ValueEnumerator &,
956 SmallVectorImpl<uint64_t> &,
958 llvm_unreachable("write not implemented");
960 static void WriteMDGlobalVariable(const MDGlobalVariable *,
961 const ValueEnumerator &, BitstreamWriter &,
962 SmallVectorImpl<uint64_t> &, unsigned) {
963 llvm_unreachable("write not implemented");
965 static void WriteMDLocalVariable(const MDLocalVariable *,
966 const ValueEnumerator &, BitstreamWriter &,
967 SmallVectorImpl<uint64_t> &, unsigned) {
968 llvm_unreachable("write not implemented");
970 static void WriteMDExpression(const MDExpression *, const ValueEnumerator &,
971 BitstreamWriter &, SmallVectorImpl<uint64_t> &,
973 llvm_unreachable("write not implemented");
975 static void WriteMDObjCProperty(const MDObjCProperty *, const ValueEnumerator &,
976 BitstreamWriter &, SmallVectorImpl<uint64_t> &,
978 llvm_unreachable("write not implemented");
980 static void WriteMDImportedEntity(const MDImportedEntity *,
981 const ValueEnumerator &, BitstreamWriter &,
982 SmallVectorImpl<uint64_t> &, unsigned) {
983 llvm_unreachable("write not implemented");
986 static void WriteModuleMetadata(const Module *M,
987 const ValueEnumerator &VE,
988 BitstreamWriter &Stream) {
989 const auto &MDs = VE.getMDs();
990 if (MDs.empty() && M->named_metadata_empty())
993 Stream.EnterSubblock(bitc::METADATA_BLOCK_ID, 3);
995 unsigned MDSAbbrev = 0;
996 if (VE.hasMDString()) {
997 // Abbrev for METADATA_STRING.
998 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
999 Abbv->Add(BitCodeAbbrevOp(bitc::METADATA_STRING));
1000 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
1001 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 8));
1002 MDSAbbrev = Stream.EmitAbbrev(Abbv);
1005 // Initialize MDNode abbreviations.
1006 #define HANDLE_MDNODE_LEAF(CLASS) unsigned CLASS##Abbrev = 0;
1007 #include "llvm/IR/Metadata.def"
1009 if (VE.hasMDLocation()) {
1010 // Abbrev for METADATA_LOCATION.
1012 // Assume the column is usually under 128, and always output the inlined-at
1013 // location (it's never more expensive than building an array size 1).
1014 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
1015 Abbv->Add(BitCodeAbbrevOp(bitc::METADATA_LOCATION));
1016 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1));
1017 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));
1018 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8));
1019 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));
1020 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));
1021 MDLocationAbbrev = Stream.EmitAbbrev(Abbv);
1024 if (VE.hasGenericDebugNode()) {
1025 // Abbrev for METADATA_GENERIC_DEBUG.
1027 // Assume the column is usually under 128, and always output the inlined-at
1028 // location (it's never more expensive than building an array size 1).
1029 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
1030 Abbv->Add(BitCodeAbbrevOp(bitc::METADATA_GENERIC_DEBUG));
1031 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1));
1032 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));
1033 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1));
1034 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));
1035 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
1036 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));
1037 GenericDebugNodeAbbrev = Stream.EmitAbbrev(Abbv);
1040 unsigned NameAbbrev = 0;
1041 if (!M->named_metadata_empty()) {
1042 // Abbrev for METADATA_NAME.
1043 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
1044 Abbv->Add(BitCodeAbbrevOp(bitc::METADATA_NAME));
1045 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
1046 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 8));
1047 NameAbbrev = Stream.EmitAbbrev(Abbv);
1050 SmallVector<uint64_t, 64> Record;
1051 for (const Metadata *MD : MDs) {
1052 if (const MDNode *N = dyn_cast<MDNode>(MD)) {
1053 switch (N->getMetadataID()) {
1055 llvm_unreachable("Invalid MDNode subclass");
1056 #define HANDLE_MDNODE_LEAF(CLASS) \
1057 case Metadata::CLASS##Kind: \
1058 Write##CLASS(cast<CLASS>(N), VE, Stream, Record, CLASS##Abbrev); \
1060 #include "llvm/IR/Metadata.def"
1063 if (const auto *MDC = dyn_cast<ConstantAsMetadata>(MD)) {
1064 WriteValueAsMetadata(MDC, VE, Stream, Record);
1067 const MDString *MDS = cast<MDString>(MD);
1068 // Code: [strchar x N]
1069 Record.append(MDS->bytes_begin(), MDS->bytes_end());
1071 // Emit the finished record.
1072 Stream.EmitRecord(bitc::METADATA_STRING, Record, MDSAbbrev);
1076 // Write named metadata.
1077 for (const NamedMDNode &NMD : M->named_metadata()) {
1079 StringRef Str = NMD.getName();
1080 Record.append(Str.bytes_begin(), Str.bytes_end());
1081 Stream.EmitRecord(bitc::METADATA_NAME, Record, NameAbbrev);
1084 // Write named metadata operands.
1085 for (const MDNode *N : NMD.operands())
1086 Record.push_back(VE.getMetadataID(N));
1087 Stream.EmitRecord(bitc::METADATA_NAMED_NODE, Record, 0);
1094 static void WriteFunctionLocalMetadata(const Function &F,
1095 const ValueEnumerator &VE,
1096 BitstreamWriter &Stream) {
1097 bool StartedMetadataBlock = false;
1098 SmallVector<uint64_t, 64> Record;
1099 const SmallVectorImpl<const LocalAsMetadata *> &MDs =
1100 VE.getFunctionLocalMDs();
1101 for (unsigned i = 0, e = MDs.size(); i != e; ++i) {
1102 assert(MDs[i] && "Expected valid function-local metadata");
1103 if (!StartedMetadataBlock) {
1104 Stream.EnterSubblock(bitc::METADATA_BLOCK_ID, 3);
1105 StartedMetadataBlock = true;
1107 WriteValueAsMetadata(MDs[i], VE, Stream, Record);
1110 if (StartedMetadataBlock)
1114 static void WriteMetadataAttachment(const Function &F,
1115 const ValueEnumerator &VE,
1116 BitstreamWriter &Stream) {
1117 Stream.EnterSubblock(bitc::METADATA_ATTACHMENT_ID, 3);
1119 SmallVector<uint64_t, 64> Record;
1121 // Write metadata attachments
1122 // METADATA_ATTACHMENT - [m x [value, [n x [id, mdnode]]]
1123 SmallVector<std::pair<unsigned, MDNode *>, 4> MDs;
1125 for (Function::const_iterator BB = F.begin(), E = F.end(); BB != E; ++BB)
1126 for (BasicBlock::const_iterator I = BB->begin(), E = BB->end();
1129 I->getAllMetadataOtherThanDebugLoc(MDs);
1131 // If no metadata, ignore instruction.
1132 if (MDs.empty()) continue;
1134 Record.push_back(VE.getInstructionID(I));
1136 for (unsigned i = 0, e = MDs.size(); i != e; ++i) {
1137 Record.push_back(MDs[i].first);
1138 Record.push_back(VE.getMetadataID(MDs[i].second));
1140 Stream.EmitRecord(bitc::METADATA_ATTACHMENT, Record, 0);
1147 static void WriteModuleMetadataStore(const Module *M, BitstreamWriter &Stream) {
1148 SmallVector<uint64_t, 64> Record;
1150 // Write metadata kinds
1151 // METADATA_KIND - [n x [id, name]]
1152 SmallVector<StringRef, 8> Names;
1153 M->getMDKindNames(Names);
1155 if (Names.empty()) return;
1157 Stream.EnterSubblock(bitc::METADATA_BLOCK_ID, 3);
1159 for (unsigned MDKindID = 0, e = Names.size(); MDKindID != e; ++MDKindID) {
1160 Record.push_back(MDKindID);
1161 StringRef KName = Names[MDKindID];
1162 Record.append(KName.begin(), KName.end());
1164 Stream.EmitRecord(bitc::METADATA_KIND, Record, 0);
1171 static void emitSignedInt64(SmallVectorImpl<uint64_t> &Vals, uint64_t V) {
1172 if ((int64_t)V >= 0)
1173 Vals.push_back(V << 1);
1175 Vals.push_back((-V << 1) | 1);
1178 static void WriteConstants(unsigned FirstVal, unsigned LastVal,
1179 const ValueEnumerator &VE,
1180 BitstreamWriter &Stream, bool isGlobal) {
1181 if (FirstVal == LastVal) return;
1183 Stream.EnterSubblock(bitc::CONSTANTS_BLOCK_ID, 4);
1185 unsigned AggregateAbbrev = 0;
1186 unsigned String8Abbrev = 0;
1187 unsigned CString7Abbrev = 0;
1188 unsigned CString6Abbrev = 0;
1189 // If this is a constant pool for the module, emit module-specific abbrevs.
1191 // Abbrev for CST_CODE_AGGREGATE.
1192 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
1193 Abbv->Add(BitCodeAbbrevOp(bitc::CST_CODE_AGGREGATE));
1194 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
1195 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, Log2_32_Ceil(LastVal+1)));
1196 AggregateAbbrev = Stream.EmitAbbrev(Abbv);
1198 // Abbrev for CST_CODE_STRING.
1199 Abbv = new BitCodeAbbrev();
1200 Abbv->Add(BitCodeAbbrevOp(bitc::CST_CODE_STRING));
1201 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
1202 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 8));
1203 String8Abbrev = Stream.EmitAbbrev(Abbv);
1204 // Abbrev for CST_CODE_CSTRING.
1205 Abbv = new BitCodeAbbrev();
1206 Abbv->Add(BitCodeAbbrevOp(bitc::CST_CODE_CSTRING));
1207 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
1208 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 7));
1209 CString7Abbrev = Stream.EmitAbbrev(Abbv);
1210 // Abbrev for CST_CODE_CSTRING.
1211 Abbv = new BitCodeAbbrev();
1212 Abbv->Add(BitCodeAbbrevOp(bitc::CST_CODE_CSTRING));
1213 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
1214 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Char6));
1215 CString6Abbrev = Stream.EmitAbbrev(Abbv);
1218 SmallVector<uint64_t, 64> Record;
1220 const ValueEnumerator::ValueList &Vals = VE.getValues();
1221 Type *LastTy = nullptr;
1222 for (unsigned i = FirstVal; i != LastVal; ++i) {
1223 const Value *V = Vals[i].first;
1224 // If we need to switch types, do so now.
1225 if (V->getType() != LastTy) {
1226 LastTy = V->getType();
1227 Record.push_back(VE.getTypeID(LastTy));
1228 Stream.EmitRecord(bitc::CST_CODE_SETTYPE, Record,
1229 CONSTANTS_SETTYPE_ABBREV);
1233 if (const InlineAsm *IA = dyn_cast<InlineAsm>(V)) {
1234 Record.push_back(unsigned(IA->hasSideEffects()) |
1235 unsigned(IA->isAlignStack()) << 1 |
1236 unsigned(IA->getDialect()&1) << 2);
1238 // Add the asm string.
1239 const std::string &AsmStr = IA->getAsmString();
1240 Record.push_back(AsmStr.size());
1241 for (unsigned i = 0, e = AsmStr.size(); i != e; ++i)
1242 Record.push_back(AsmStr[i]);
1244 // Add the constraint string.
1245 const std::string &ConstraintStr = IA->getConstraintString();
1246 Record.push_back(ConstraintStr.size());
1247 for (unsigned i = 0, e = ConstraintStr.size(); i != e; ++i)
1248 Record.push_back(ConstraintStr[i]);
1249 Stream.EmitRecord(bitc::CST_CODE_INLINEASM, Record);
1253 const Constant *C = cast<Constant>(V);
1254 unsigned Code = -1U;
1255 unsigned AbbrevToUse = 0;
1256 if (C->isNullValue()) {
1257 Code = bitc::CST_CODE_NULL;
1258 } else if (isa<UndefValue>(C)) {
1259 Code = bitc::CST_CODE_UNDEF;
1260 } else if (const ConstantInt *IV = dyn_cast<ConstantInt>(C)) {
1261 if (IV->getBitWidth() <= 64) {
1262 uint64_t V = IV->getSExtValue();
1263 emitSignedInt64(Record, V);
1264 Code = bitc::CST_CODE_INTEGER;
1265 AbbrevToUse = CONSTANTS_INTEGER_ABBREV;
1266 } else { // Wide integers, > 64 bits in size.
1267 // We have an arbitrary precision integer value to write whose
1268 // bit width is > 64. However, in canonical unsigned integer
1269 // format it is likely that the high bits are going to be zero.
1270 // So, we only write the number of active words.
1271 unsigned NWords = IV->getValue().getActiveWords();
1272 const uint64_t *RawWords = IV->getValue().getRawData();
1273 for (unsigned i = 0; i != NWords; ++i) {
1274 emitSignedInt64(Record, RawWords[i]);
1276 Code = bitc::CST_CODE_WIDE_INTEGER;
1278 } else if (const ConstantFP *CFP = dyn_cast<ConstantFP>(C)) {
1279 Code = bitc::CST_CODE_FLOAT;
1280 Type *Ty = CFP->getType();
1281 if (Ty->isHalfTy() || Ty->isFloatTy() || Ty->isDoubleTy()) {
1282 Record.push_back(CFP->getValueAPF().bitcastToAPInt().getZExtValue());
1283 } else if (Ty->isX86_FP80Ty()) {
1284 // api needed to prevent premature destruction
1285 // bits are not in the same order as a normal i80 APInt, compensate.
1286 APInt api = CFP->getValueAPF().bitcastToAPInt();
1287 const uint64_t *p = api.getRawData();
1288 Record.push_back((p[1] << 48) | (p[0] >> 16));
1289 Record.push_back(p[0] & 0xffffLL);
1290 } else if (Ty->isFP128Ty() || Ty->isPPC_FP128Ty()) {
1291 APInt api = CFP->getValueAPF().bitcastToAPInt();
1292 const uint64_t *p = api.getRawData();
1293 Record.push_back(p[0]);
1294 Record.push_back(p[1]);
1296 assert (0 && "Unknown FP type!");
1298 } else if (isa<ConstantDataSequential>(C) &&
1299 cast<ConstantDataSequential>(C)->isString()) {
1300 const ConstantDataSequential *Str = cast<ConstantDataSequential>(C);
1301 // Emit constant strings specially.
1302 unsigned NumElts = Str->getNumElements();
1303 // If this is a null-terminated string, use the denser CSTRING encoding.
1304 if (Str->isCString()) {
1305 Code = bitc::CST_CODE_CSTRING;
1306 --NumElts; // Don't encode the null, which isn't allowed by char6.
1308 Code = bitc::CST_CODE_STRING;
1309 AbbrevToUse = String8Abbrev;
1311 bool isCStr7 = Code == bitc::CST_CODE_CSTRING;
1312 bool isCStrChar6 = Code == bitc::CST_CODE_CSTRING;
1313 for (unsigned i = 0; i != NumElts; ++i) {
1314 unsigned char V = Str->getElementAsInteger(i);
1315 Record.push_back(V);
1316 isCStr7 &= (V & 128) == 0;
1318 isCStrChar6 = BitCodeAbbrevOp::isChar6(V);
1322 AbbrevToUse = CString6Abbrev;
1324 AbbrevToUse = CString7Abbrev;
1325 } else if (const ConstantDataSequential *CDS =
1326 dyn_cast<ConstantDataSequential>(C)) {
1327 Code = bitc::CST_CODE_DATA;
1328 Type *EltTy = CDS->getType()->getElementType();
1329 if (isa<IntegerType>(EltTy)) {
1330 for (unsigned i = 0, e = CDS->getNumElements(); i != e; ++i)
1331 Record.push_back(CDS->getElementAsInteger(i));
1332 } else if (EltTy->isFloatTy()) {
1333 for (unsigned i = 0, e = CDS->getNumElements(); i != e; ++i) {
1334 union { float F; uint32_t I; };
1335 F = CDS->getElementAsFloat(i);
1336 Record.push_back(I);
1339 assert(EltTy->isDoubleTy() && "Unknown ConstantData element type");
1340 for (unsigned i = 0, e = CDS->getNumElements(); i != e; ++i) {
1341 union { double F; uint64_t I; };
1342 F = CDS->getElementAsDouble(i);
1343 Record.push_back(I);
1346 } else if (isa<ConstantArray>(C) || isa<ConstantStruct>(C) ||
1347 isa<ConstantVector>(C)) {
1348 Code = bitc::CST_CODE_AGGREGATE;
1349 for (unsigned i = 0, e = C->getNumOperands(); i != e; ++i)
1350 Record.push_back(VE.getValueID(C->getOperand(i)));
1351 AbbrevToUse = AggregateAbbrev;
1352 } else if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(C)) {
1353 switch (CE->getOpcode()) {
1355 if (Instruction::isCast(CE->getOpcode())) {
1356 Code = bitc::CST_CODE_CE_CAST;
1357 Record.push_back(GetEncodedCastOpcode(CE->getOpcode()));
1358 Record.push_back(VE.getTypeID(C->getOperand(0)->getType()));
1359 Record.push_back(VE.getValueID(C->getOperand(0)));
1360 AbbrevToUse = CONSTANTS_CE_CAST_Abbrev;
1362 assert(CE->getNumOperands() == 2 && "Unknown constant expr!");
1363 Code = bitc::CST_CODE_CE_BINOP;
1364 Record.push_back(GetEncodedBinaryOpcode(CE->getOpcode()));
1365 Record.push_back(VE.getValueID(C->getOperand(0)));
1366 Record.push_back(VE.getValueID(C->getOperand(1)));
1367 uint64_t Flags = GetOptimizationFlags(CE);
1369 Record.push_back(Flags);
1372 case Instruction::GetElementPtr:
1373 Code = bitc::CST_CODE_CE_GEP;
1374 if (cast<GEPOperator>(C)->isInBounds())
1375 Code = bitc::CST_CODE_CE_INBOUNDS_GEP;
1376 for (unsigned i = 0, e = CE->getNumOperands(); i != e; ++i) {
1377 Record.push_back(VE.getTypeID(C->getOperand(i)->getType()));
1378 Record.push_back(VE.getValueID(C->getOperand(i)));
1381 case Instruction::Select:
1382 Code = bitc::CST_CODE_CE_SELECT;
1383 Record.push_back(VE.getValueID(C->getOperand(0)));
1384 Record.push_back(VE.getValueID(C->getOperand(1)));
1385 Record.push_back(VE.getValueID(C->getOperand(2)));
1387 case Instruction::ExtractElement:
1388 Code = bitc::CST_CODE_CE_EXTRACTELT;
1389 Record.push_back(VE.getTypeID(C->getOperand(0)->getType()));
1390 Record.push_back(VE.getValueID(C->getOperand(0)));
1391 Record.push_back(VE.getTypeID(C->getOperand(1)->getType()));
1392 Record.push_back(VE.getValueID(C->getOperand(1)));
1394 case Instruction::InsertElement:
1395 Code = bitc::CST_CODE_CE_INSERTELT;
1396 Record.push_back(VE.getValueID(C->getOperand(0)));
1397 Record.push_back(VE.getValueID(C->getOperand(1)));
1398 Record.push_back(VE.getTypeID(C->getOperand(2)->getType()));
1399 Record.push_back(VE.getValueID(C->getOperand(2)));
1401 case Instruction::ShuffleVector:
1402 // If the return type and argument types are the same, this is a
1403 // standard shufflevector instruction. If the types are different,
1404 // then the shuffle is widening or truncating the input vectors, and
1405 // the argument type must also be encoded.
1406 if (C->getType() == C->getOperand(0)->getType()) {
1407 Code = bitc::CST_CODE_CE_SHUFFLEVEC;
1409 Code = bitc::CST_CODE_CE_SHUFVEC_EX;
1410 Record.push_back(VE.getTypeID(C->getOperand(0)->getType()));
1412 Record.push_back(VE.getValueID(C->getOperand(0)));
1413 Record.push_back(VE.getValueID(C->getOperand(1)));
1414 Record.push_back(VE.getValueID(C->getOperand(2)));
1416 case Instruction::ICmp:
1417 case Instruction::FCmp:
1418 Code = bitc::CST_CODE_CE_CMP;
1419 Record.push_back(VE.getTypeID(C->getOperand(0)->getType()));
1420 Record.push_back(VE.getValueID(C->getOperand(0)));
1421 Record.push_back(VE.getValueID(C->getOperand(1)));
1422 Record.push_back(CE->getPredicate());
1425 } else if (const BlockAddress *BA = dyn_cast<BlockAddress>(C)) {
1426 Code = bitc::CST_CODE_BLOCKADDRESS;
1427 Record.push_back(VE.getTypeID(BA->getFunction()->getType()));
1428 Record.push_back(VE.getValueID(BA->getFunction()));
1429 Record.push_back(VE.getGlobalBasicBlockID(BA->getBasicBlock()));
1434 llvm_unreachable("Unknown constant!");
1436 Stream.EmitRecord(Code, Record, AbbrevToUse);
1443 static void WriteModuleConstants(const ValueEnumerator &VE,
1444 BitstreamWriter &Stream) {
1445 const ValueEnumerator::ValueList &Vals = VE.getValues();
1447 // Find the first constant to emit, which is the first non-globalvalue value.
1448 // We know globalvalues have been emitted by WriteModuleInfo.
1449 for (unsigned i = 0, e = Vals.size(); i != e; ++i) {
1450 if (!isa<GlobalValue>(Vals[i].first)) {
1451 WriteConstants(i, Vals.size(), VE, Stream, true);
1457 /// PushValueAndType - The file has to encode both the value and type id for
1458 /// many values, because we need to know what type to create for forward
1459 /// references. However, most operands are not forward references, so this type
1460 /// field is not needed.
1462 /// This function adds V's value ID to Vals. If the value ID is higher than the
1463 /// instruction ID, then it is a forward reference, and it also includes the
1464 /// type ID. The value ID that is written is encoded relative to the InstID.
1465 static bool PushValueAndType(const Value *V, unsigned InstID,
1466 SmallVectorImpl<unsigned> &Vals,
1467 ValueEnumerator &VE) {
1468 unsigned ValID = VE.getValueID(V);
1469 // Make encoding relative to the InstID.
1470 Vals.push_back(InstID - ValID);
1471 if (ValID >= InstID) {
1472 Vals.push_back(VE.getTypeID(V->getType()));
1478 /// pushValue - Like PushValueAndType, but where the type of the value is
1479 /// omitted (perhaps it was already encoded in an earlier operand).
1480 static void pushValue(const Value *V, unsigned InstID,
1481 SmallVectorImpl<unsigned> &Vals,
1482 ValueEnumerator &VE) {
1483 unsigned ValID = VE.getValueID(V);
1484 Vals.push_back(InstID - ValID);
1487 static void pushValueSigned(const Value *V, unsigned InstID,
1488 SmallVectorImpl<uint64_t> &Vals,
1489 ValueEnumerator &VE) {
1490 unsigned ValID = VE.getValueID(V);
1491 int64_t diff = ((int32_t)InstID - (int32_t)ValID);
1492 emitSignedInt64(Vals, diff);
1495 /// WriteInstruction - Emit an instruction to the specified stream.
1496 static void WriteInstruction(const Instruction &I, unsigned InstID,
1497 ValueEnumerator &VE, BitstreamWriter &Stream,
1498 SmallVectorImpl<unsigned> &Vals) {
1500 unsigned AbbrevToUse = 0;
1501 VE.setInstructionID(&I);
1502 switch (I.getOpcode()) {
1504 if (Instruction::isCast(I.getOpcode())) {
1505 Code = bitc::FUNC_CODE_INST_CAST;
1506 if (!PushValueAndType(I.getOperand(0), InstID, Vals, VE))
1507 AbbrevToUse = FUNCTION_INST_CAST_ABBREV;
1508 Vals.push_back(VE.getTypeID(I.getType()));
1509 Vals.push_back(GetEncodedCastOpcode(I.getOpcode()));
1511 assert(isa<BinaryOperator>(I) && "Unknown instruction!");
1512 Code = bitc::FUNC_CODE_INST_BINOP;
1513 if (!PushValueAndType(I.getOperand(0), InstID, Vals, VE))
1514 AbbrevToUse = FUNCTION_INST_BINOP_ABBREV;
1515 pushValue(I.getOperand(1), InstID, Vals, VE);
1516 Vals.push_back(GetEncodedBinaryOpcode(I.getOpcode()));
1517 uint64_t Flags = GetOptimizationFlags(&I);
1519 if (AbbrevToUse == FUNCTION_INST_BINOP_ABBREV)
1520 AbbrevToUse = FUNCTION_INST_BINOP_FLAGS_ABBREV;
1521 Vals.push_back(Flags);
1526 case Instruction::GetElementPtr:
1527 Code = bitc::FUNC_CODE_INST_GEP;
1528 if (cast<GEPOperator>(&I)->isInBounds())
1529 Code = bitc::FUNC_CODE_INST_INBOUNDS_GEP;
1530 for (unsigned i = 0, e = I.getNumOperands(); i != e; ++i)
1531 PushValueAndType(I.getOperand(i), InstID, Vals, VE);
1533 case Instruction::ExtractValue: {
1534 Code = bitc::FUNC_CODE_INST_EXTRACTVAL;
1535 PushValueAndType(I.getOperand(0), InstID, Vals, VE);
1536 const ExtractValueInst *EVI = cast<ExtractValueInst>(&I);
1537 for (const unsigned *i = EVI->idx_begin(), *e = EVI->idx_end(); i != e; ++i)
1541 case Instruction::InsertValue: {
1542 Code = bitc::FUNC_CODE_INST_INSERTVAL;
1543 PushValueAndType(I.getOperand(0), InstID, Vals, VE);
1544 PushValueAndType(I.getOperand(1), InstID, Vals, VE);
1545 const InsertValueInst *IVI = cast<InsertValueInst>(&I);
1546 for (const unsigned *i = IVI->idx_begin(), *e = IVI->idx_end(); i != e; ++i)
1550 case Instruction::Select:
1551 Code = bitc::FUNC_CODE_INST_VSELECT;
1552 PushValueAndType(I.getOperand(1), InstID, Vals, VE);
1553 pushValue(I.getOperand(2), InstID, Vals, VE);
1554 PushValueAndType(I.getOperand(0), InstID, Vals, VE);
1556 case Instruction::ExtractElement:
1557 Code = bitc::FUNC_CODE_INST_EXTRACTELT;
1558 PushValueAndType(I.getOperand(0), InstID, Vals, VE);
1559 PushValueAndType(I.getOperand(1), InstID, Vals, VE);
1561 case Instruction::InsertElement:
1562 Code = bitc::FUNC_CODE_INST_INSERTELT;
1563 PushValueAndType(I.getOperand(0), InstID, Vals, VE);
1564 pushValue(I.getOperand(1), InstID, Vals, VE);
1565 PushValueAndType(I.getOperand(2), InstID, Vals, VE);
1567 case Instruction::ShuffleVector:
1568 Code = bitc::FUNC_CODE_INST_SHUFFLEVEC;
1569 PushValueAndType(I.getOperand(0), InstID, Vals, VE);
1570 pushValue(I.getOperand(1), InstID, Vals, VE);
1571 pushValue(I.getOperand(2), InstID, Vals, VE);
1573 case Instruction::ICmp:
1574 case Instruction::FCmp:
1575 // compare returning Int1Ty or vector of Int1Ty
1576 Code = bitc::FUNC_CODE_INST_CMP2;
1577 PushValueAndType(I.getOperand(0), InstID, Vals, VE);
1578 pushValue(I.getOperand(1), InstID, Vals, VE);
1579 Vals.push_back(cast<CmpInst>(I).getPredicate());
1582 case Instruction::Ret:
1584 Code = bitc::FUNC_CODE_INST_RET;
1585 unsigned NumOperands = I.getNumOperands();
1586 if (NumOperands == 0)
1587 AbbrevToUse = FUNCTION_INST_RET_VOID_ABBREV;
1588 else if (NumOperands == 1) {
1589 if (!PushValueAndType(I.getOperand(0), InstID, Vals, VE))
1590 AbbrevToUse = FUNCTION_INST_RET_VAL_ABBREV;
1592 for (unsigned i = 0, e = NumOperands; i != e; ++i)
1593 PushValueAndType(I.getOperand(i), InstID, Vals, VE);
1597 case Instruction::Br:
1599 Code = bitc::FUNC_CODE_INST_BR;
1600 const BranchInst &II = cast<BranchInst>(I);
1601 Vals.push_back(VE.getValueID(II.getSuccessor(0)));
1602 if (II.isConditional()) {
1603 Vals.push_back(VE.getValueID(II.getSuccessor(1)));
1604 pushValue(II.getCondition(), InstID, Vals, VE);
1608 case Instruction::Switch:
1610 Code = bitc::FUNC_CODE_INST_SWITCH;
1611 const SwitchInst &SI = cast<SwitchInst>(I);
1612 Vals.push_back(VE.getTypeID(SI.getCondition()->getType()));
1613 pushValue(SI.getCondition(), InstID, Vals, VE);
1614 Vals.push_back(VE.getValueID(SI.getDefaultDest()));
1615 for (SwitchInst::ConstCaseIt i = SI.case_begin(), e = SI.case_end();
1617 Vals.push_back(VE.getValueID(i.getCaseValue()));
1618 Vals.push_back(VE.getValueID(i.getCaseSuccessor()));
1622 case Instruction::IndirectBr:
1623 Code = bitc::FUNC_CODE_INST_INDIRECTBR;
1624 Vals.push_back(VE.getTypeID(I.getOperand(0)->getType()));
1625 // Encode the address operand as relative, but not the basic blocks.
1626 pushValue(I.getOperand(0), InstID, Vals, VE);
1627 for (unsigned i = 1, e = I.getNumOperands(); i != e; ++i)
1628 Vals.push_back(VE.getValueID(I.getOperand(i)));
1631 case Instruction::Invoke: {
1632 const InvokeInst *II = cast<InvokeInst>(&I);
1633 const Value *Callee(II->getCalledValue());
1634 PointerType *PTy = cast<PointerType>(Callee->getType());
1635 FunctionType *FTy = cast<FunctionType>(PTy->getElementType());
1636 Code = bitc::FUNC_CODE_INST_INVOKE;
1638 Vals.push_back(VE.getAttributeID(II->getAttributes()));
1639 Vals.push_back(II->getCallingConv());
1640 Vals.push_back(VE.getValueID(II->getNormalDest()));
1641 Vals.push_back(VE.getValueID(II->getUnwindDest()));
1642 PushValueAndType(Callee, InstID, Vals, VE);
1644 // Emit value #'s for the fixed parameters.
1645 for (unsigned i = 0, e = FTy->getNumParams(); i != e; ++i)
1646 pushValue(I.getOperand(i), InstID, Vals, VE); // fixed param.
1648 // Emit type/value pairs for varargs params.
1649 if (FTy->isVarArg()) {
1650 for (unsigned i = FTy->getNumParams(), e = I.getNumOperands()-3;
1652 PushValueAndType(I.getOperand(i), InstID, Vals, VE); // vararg
1656 case Instruction::Resume:
1657 Code = bitc::FUNC_CODE_INST_RESUME;
1658 PushValueAndType(I.getOperand(0), InstID, Vals, VE);
1660 case Instruction::Unreachable:
1661 Code = bitc::FUNC_CODE_INST_UNREACHABLE;
1662 AbbrevToUse = FUNCTION_INST_UNREACHABLE_ABBREV;
1665 case Instruction::PHI: {
1666 const PHINode &PN = cast<PHINode>(I);
1667 Code = bitc::FUNC_CODE_INST_PHI;
1668 // With the newer instruction encoding, forward references could give
1669 // negative valued IDs. This is most common for PHIs, so we use
1671 SmallVector<uint64_t, 128> Vals64;
1672 Vals64.push_back(VE.getTypeID(PN.getType()));
1673 for (unsigned i = 0, e = PN.getNumIncomingValues(); i != e; ++i) {
1674 pushValueSigned(PN.getIncomingValue(i), InstID, Vals64, VE);
1675 Vals64.push_back(VE.getValueID(PN.getIncomingBlock(i)));
1677 // Emit a Vals64 vector and exit.
1678 Stream.EmitRecord(Code, Vals64, AbbrevToUse);
1683 case Instruction::LandingPad: {
1684 const LandingPadInst &LP = cast<LandingPadInst>(I);
1685 Code = bitc::FUNC_CODE_INST_LANDINGPAD;
1686 Vals.push_back(VE.getTypeID(LP.getType()));
1687 PushValueAndType(LP.getPersonalityFn(), InstID, Vals, VE);
1688 Vals.push_back(LP.isCleanup());
1689 Vals.push_back(LP.getNumClauses());
1690 for (unsigned I = 0, E = LP.getNumClauses(); I != E; ++I) {
1692 Vals.push_back(LandingPadInst::Catch);
1694 Vals.push_back(LandingPadInst::Filter);
1695 PushValueAndType(LP.getClause(I), InstID, Vals, VE);
1700 case Instruction::Alloca: {
1701 Code = bitc::FUNC_CODE_INST_ALLOCA;
1702 Vals.push_back(VE.getTypeID(I.getType()));
1703 Vals.push_back(VE.getTypeID(I.getOperand(0)->getType()));
1704 Vals.push_back(VE.getValueID(I.getOperand(0))); // size.
1705 const AllocaInst &AI = cast<AllocaInst>(I);
1706 unsigned AlignRecord = Log2_32(AI.getAlignment()) + 1;
1707 assert(Log2_32(Value::MaximumAlignment) + 1 < 1 << 5 &&
1708 "not enough bits for maximum alignment");
1709 assert(AlignRecord < 1 << 5 && "alignment greater than 1 << 64");
1710 AlignRecord |= AI.isUsedWithInAlloca() << 5;
1711 Vals.push_back(AlignRecord);
1715 case Instruction::Load:
1716 if (cast<LoadInst>(I).isAtomic()) {
1717 Code = bitc::FUNC_CODE_INST_LOADATOMIC;
1718 PushValueAndType(I.getOperand(0), InstID, Vals, VE);
1720 Code = bitc::FUNC_CODE_INST_LOAD;
1721 if (!PushValueAndType(I.getOperand(0), InstID, Vals, VE)) // ptr
1722 AbbrevToUse = FUNCTION_INST_LOAD_ABBREV;
1724 Vals.push_back(Log2_32(cast<LoadInst>(I).getAlignment())+1);
1725 Vals.push_back(cast<LoadInst>(I).isVolatile());
1726 if (cast<LoadInst>(I).isAtomic()) {
1727 Vals.push_back(GetEncodedOrdering(cast<LoadInst>(I).getOrdering()));
1728 Vals.push_back(GetEncodedSynchScope(cast<LoadInst>(I).getSynchScope()));
1731 case Instruction::Store:
1732 if (cast<StoreInst>(I).isAtomic())
1733 Code = bitc::FUNC_CODE_INST_STOREATOMIC;
1735 Code = bitc::FUNC_CODE_INST_STORE;
1736 PushValueAndType(I.getOperand(1), InstID, Vals, VE); // ptrty + ptr
1737 pushValue(I.getOperand(0), InstID, Vals, VE); // val.
1738 Vals.push_back(Log2_32(cast<StoreInst>(I).getAlignment())+1);
1739 Vals.push_back(cast<StoreInst>(I).isVolatile());
1740 if (cast<StoreInst>(I).isAtomic()) {
1741 Vals.push_back(GetEncodedOrdering(cast<StoreInst>(I).getOrdering()));
1742 Vals.push_back(GetEncodedSynchScope(cast<StoreInst>(I).getSynchScope()));
1745 case Instruction::AtomicCmpXchg:
1746 Code = bitc::FUNC_CODE_INST_CMPXCHG;
1747 PushValueAndType(I.getOperand(0), InstID, Vals, VE); // ptrty + ptr
1748 pushValue(I.getOperand(1), InstID, Vals, VE); // cmp.
1749 pushValue(I.getOperand(2), InstID, Vals, VE); // newval.
1750 Vals.push_back(cast<AtomicCmpXchgInst>(I).isVolatile());
1751 Vals.push_back(GetEncodedOrdering(
1752 cast<AtomicCmpXchgInst>(I).getSuccessOrdering()));
1753 Vals.push_back(GetEncodedSynchScope(
1754 cast<AtomicCmpXchgInst>(I).getSynchScope()));
1755 Vals.push_back(GetEncodedOrdering(
1756 cast<AtomicCmpXchgInst>(I).getFailureOrdering()));
1757 Vals.push_back(cast<AtomicCmpXchgInst>(I).isWeak());
1759 case Instruction::AtomicRMW:
1760 Code = bitc::FUNC_CODE_INST_ATOMICRMW;
1761 PushValueAndType(I.getOperand(0), InstID, Vals, VE); // ptrty + ptr
1762 pushValue(I.getOperand(1), InstID, Vals, VE); // val.
1763 Vals.push_back(GetEncodedRMWOperation(
1764 cast<AtomicRMWInst>(I).getOperation()));
1765 Vals.push_back(cast<AtomicRMWInst>(I).isVolatile());
1766 Vals.push_back(GetEncodedOrdering(cast<AtomicRMWInst>(I).getOrdering()));
1767 Vals.push_back(GetEncodedSynchScope(
1768 cast<AtomicRMWInst>(I).getSynchScope()));
1770 case Instruction::Fence:
1771 Code = bitc::FUNC_CODE_INST_FENCE;
1772 Vals.push_back(GetEncodedOrdering(cast<FenceInst>(I).getOrdering()));
1773 Vals.push_back(GetEncodedSynchScope(cast<FenceInst>(I).getSynchScope()));
1775 case Instruction::Call: {
1776 const CallInst &CI = cast<CallInst>(I);
1777 PointerType *PTy = cast<PointerType>(CI.getCalledValue()->getType());
1778 FunctionType *FTy = cast<FunctionType>(PTy->getElementType());
1780 Code = bitc::FUNC_CODE_INST_CALL;
1782 Vals.push_back(VE.getAttributeID(CI.getAttributes()));
1783 Vals.push_back((CI.getCallingConv() << 1) | unsigned(CI.isTailCall()) |
1784 unsigned(CI.isMustTailCall()) << 14);
1785 PushValueAndType(CI.getCalledValue(), InstID, Vals, VE); // Callee
1787 // Emit value #'s for the fixed parameters.
1788 for (unsigned i = 0, e = FTy->getNumParams(); i != e; ++i) {
1789 // Check for labels (can happen with asm labels).
1790 if (FTy->getParamType(i)->isLabelTy())
1791 Vals.push_back(VE.getValueID(CI.getArgOperand(i)));
1793 pushValue(CI.getArgOperand(i), InstID, Vals, VE); // fixed param.
1796 // Emit type/value pairs for varargs params.
1797 if (FTy->isVarArg()) {
1798 for (unsigned i = FTy->getNumParams(), e = CI.getNumArgOperands();
1800 PushValueAndType(CI.getArgOperand(i), InstID, Vals, VE); // varargs
1804 case Instruction::VAArg:
1805 Code = bitc::FUNC_CODE_INST_VAARG;
1806 Vals.push_back(VE.getTypeID(I.getOperand(0)->getType())); // valistty
1807 pushValue(I.getOperand(0), InstID, Vals, VE); // valist.
1808 Vals.push_back(VE.getTypeID(I.getType())); // restype.
1812 Stream.EmitRecord(Code, Vals, AbbrevToUse);
1816 // Emit names for globals/functions etc.
1817 static void WriteValueSymbolTable(const ValueSymbolTable &VST,
1818 const ValueEnumerator &VE,
1819 BitstreamWriter &Stream) {
1820 if (VST.empty()) return;
1821 Stream.EnterSubblock(bitc::VALUE_SYMTAB_BLOCK_ID, 4);
1823 // FIXME: Set up the abbrev, we know how many values there are!
1824 // FIXME: We know if the type names can use 7-bit ascii.
1825 SmallVector<unsigned, 64> NameVals;
1827 for (ValueSymbolTable::const_iterator SI = VST.begin(), SE = VST.end();
1830 const ValueName &Name = *SI;
1832 // Figure out the encoding to use for the name.
1834 bool isChar6 = true;
1835 for (const char *C = Name.getKeyData(), *E = C+Name.getKeyLength();
1838 isChar6 = BitCodeAbbrevOp::isChar6(*C);
1839 if ((unsigned char)*C & 128) {
1841 break; // don't bother scanning the rest.
1845 unsigned AbbrevToUse = VST_ENTRY_8_ABBREV;
1847 // VST_ENTRY: [valueid, namechar x N]
1848 // VST_BBENTRY: [bbid, namechar x N]
1850 if (isa<BasicBlock>(SI->getValue())) {
1851 Code = bitc::VST_CODE_BBENTRY;
1853 AbbrevToUse = VST_BBENTRY_6_ABBREV;
1855 Code = bitc::VST_CODE_ENTRY;
1857 AbbrevToUse = VST_ENTRY_6_ABBREV;
1859 AbbrevToUse = VST_ENTRY_7_ABBREV;
1862 NameVals.push_back(VE.getValueID(SI->getValue()));
1863 for (const char *P = Name.getKeyData(),
1864 *E = Name.getKeyData()+Name.getKeyLength(); P != E; ++P)
1865 NameVals.push_back((unsigned char)*P);
1867 // Emit the finished record.
1868 Stream.EmitRecord(Code, NameVals, AbbrevToUse);
1874 static void WriteUseList(ValueEnumerator &VE, UseListOrder &&Order,
1875 BitstreamWriter &Stream) {
1876 assert(Order.Shuffle.size() >= 2 && "Shuffle too small");
1878 if (isa<BasicBlock>(Order.V))
1879 Code = bitc::USELIST_CODE_BB;
1881 Code = bitc::USELIST_CODE_DEFAULT;
1883 SmallVector<uint64_t, 64> Record;
1884 for (unsigned I : Order.Shuffle)
1885 Record.push_back(I);
1886 Record.push_back(VE.getValueID(Order.V));
1887 Stream.EmitRecord(Code, Record);
1890 static void WriteUseListBlock(const Function *F, ValueEnumerator &VE,
1891 BitstreamWriter &Stream) {
1892 auto hasMore = [&]() {
1893 return !VE.UseListOrders.empty() && VE.UseListOrders.back().F == F;
1899 Stream.EnterSubblock(bitc::USELIST_BLOCK_ID, 3);
1901 WriteUseList(VE, std::move(VE.UseListOrders.back()), Stream);
1902 VE.UseListOrders.pop_back();
1907 /// WriteFunction - Emit a function body to the module stream.
1908 static void WriteFunction(const Function &F, ValueEnumerator &VE,
1909 BitstreamWriter &Stream) {
1910 Stream.EnterSubblock(bitc::FUNCTION_BLOCK_ID, 4);
1911 VE.incorporateFunction(F);
1913 SmallVector<unsigned, 64> Vals;
1915 // Emit the number of basic blocks, so the reader can create them ahead of
1917 Vals.push_back(VE.getBasicBlocks().size());
1918 Stream.EmitRecord(bitc::FUNC_CODE_DECLAREBLOCKS, Vals);
1921 // If there are function-local constants, emit them now.
1922 unsigned CstStart, CstEnd;
1923 VE.getFunctionConstantRange(CstStart, CstEnd);
1924 WriteConstants(CstStart, CstEnd, VE, Stream, false);
1926 // If there is function-local metadata, emit it now.
1927 WriteFunctionLocalMetadata(F, VE, Stream);
1929 // Keep a running idea of what the instruction ID is.
1930 unsigned InstID = CstEnd;
1932 bool NeedsMetadataAttachment = false;
1936 // Finally, emit all the instructions, in order.
1937 for (Function::const_iterator BB = F.begin(), E = F.end(); BB != E; ++BB)
1938 for (BasicBlock::const_iterator I = BB->begin(), E = BB->end();
1940 WriteInstruction(*I, InstID, VE, Stream, Vals);
1942 if (!I->getType()->isVoidTy())
1945 // If the instruction has metadata, write a metadata attachment later.
1946 NeedsMetadataAttachment |= I->hasMetadataOtherThanDebugLoc();
1948 // If the instruction has a debug location, emit it.
1949 DebugLoc DL = I->getDebugLoc();
1950 if (DL.isUnknown()) {
1952 } else if (DL == LastDL) {
1953 // Just repeat the same debug loc as last time.
1954 Stream.EmitRecord(bitc::FUNC_CODE_DEBUG_LOC_AGAIN, Vals);
1957 DL.getScopeAndInlinedAt(Scope, IA, I->getContext());
1958 assert(Scope && "Expected valid scope");
1960 Vals.push_back(DL.getLine());
1961 Vals.push_back(DL.getCol());
1962 Vals.push_back(VE.getMetadataOrNullID(Scope));
1963 Vals.push_back(VE.getMetadataOrNullID(IA));
1964 Stream.EmitRecord(bitc::FUNC_CODE_DEBUG_LOC, Vals);
1971 // Emit names for all the instructions etc.
1972 WriteValueSymbolTable(F.getValueSymbolTable(), VE, Stream);
1974 if (NeedsMetadataAttachment)
1975 WriteMetadataAttachment(F, VE, Stream);
1976 if (shouldPreserveBitcodeUseListOrder())
1977 WriteUseListBlock(&F, VE, Stream);
1982 // Emit blockinfo, which defines the standard abbreviations etc.
1983 static void WriteBlockInfo(const ValueEnumerator &VE, BitstreamWriter &Stream) {
1984 // We only want to emit block info records for blocks that have multiple
1985 // instances: CONSTANTS_BLOCK, FUNCTION_BLOCK and VALUE_SYMTAB_BLOCK.
1986 // Other blocks can define their abbrevs inline.
1987 Stream.EnterBlockInfoBlock(2);
1989 { // 8-bit fixed-width VST_ENTRY/VST_BBENTRY strings.
1990 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
1991 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 3));
1992 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8));
1993 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
1994 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 8));
1995 if (Stream.EmitBlockInfoAbbrev(bitc::VALUE_SYMTAB_BLOCK_ID,
1996 Abbv) != VST_ENTRY_8_ABBREV)
1997 llvm_unreachable("Unexpected abbrev ordering!");
2000 { // 7-bit fixed width VST_ENTRY strings.
2001 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
2002 Abbv->Add(BitCodeAbbrevOp(bitc::VST_CODE_ENTRY));
2003 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8));
2004 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
2005 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 7));
2006 if (Stream.EmitBlockInfoAbbrev(bitc::VALUE_SYMTAB_BLOCK_ID,
2007 Abbv) != VST_ENTRY_7_ABBREV)
2008 llvm_unreachable("Unexpected abbrev ordering!");
2010 { // 6-bit char6 VST_ENTRY strings.
2011 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
2012 Abbv->Add(BitCodeAbbrevOp(bitc::VST_CODE_ENTRY));
2013 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8));
2014 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
2015 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Char6));
2016 if (Stream.EmitBlockInfoAbbrev(bitc::VALUE_SYMTAB_BLOCK_ID,
2017 Abbv) != VST_ENTRY_6_ABBREV)
2018 llvm_unreachable("Unexpected abbrev ordering!");
2020 { // 6-bit char6 VST_BBENTRY strings.
2021 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
2022 Abbv->Add(BitCodeAbbrevOp(bitc::VST_CODE_BBENTRY));
2023 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8));
2024 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
2025 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Char6));
2026 if (Stream.EmitBlockInfoAbbrev(bitc::VALUE_SYMTAB_BLOCK_ID,
2027 Abbv) != VST_BBENTRY_6_ABBREV)
2028 llvm_unreachable("Unexpected abbrev ordering!");
2033 { // SETTYPE abbrev for CONSTANTS_BLOCK.
2034 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
2035 Abbv->Add(BitCodeAbbrevOp(bitc::CST_CODE_SETTYPE));
2036 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed,
2037 Log2_32_Ceil(VE.getTypes().size()+1)));
2038 if (Stream.EmitBlockInfoAbbrev(bitc::CONSTANTS_BLOCK_ID,
2039 Abbv) != CONSTANTS_SETTYPE_ABBREV)
2040 llvm_unreachable("Unexpected abbrev ordering!");
2043 { // INTEGER abbrev for CONSTANTS_BLOCK.
2044 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
2045 Abbv->Add(BitCodeAbbrevOp(bitc::CST_CODE_INTEGER));
2046 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8));
2047 if (Stream.EmitBlockInfoAbbrev(bitc::CONSTANTS_BLOCK_ID,
2048 Abbv) != CONSTANTS_INTEGER_ABBREV)
2049 llvm_unreachable("Unexpected abbrev ordering!");
2052 { // CE_CAST abbrev for CONSTANTS_BLOCK.
2053 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
2054 Abbv->Add(BitCodeAbbrevOp(bitc::CST_CODE_CE_CAST));
2055 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 4)); // cast opc
2056 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, // typeid
2057 Log2_32_Ceil(VE.getTypes().size()+1)));
2058 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8)); // value id
2060 if (Stream.EmitBlockInfoAbbrev(bitc::CONSTANTS_BLOCK_ID,
2061 Abbv) != CONSTANTS_CE_CAST_Abbrev)
2062 llvm_unreachable("Unexpected abbrev ordering!");
2064 { // NULL abbrev for CONSTANTS_BLOCK.
2065 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
2066 Abbv->Add(BitCodeAbbrevOp(bitc::CST_CODE_NULL));
2067 if (Stream.EmitBlockInfoAbbrev(bitc::CONSTANTS_BLOCK_ID,
2068 Abbv) != CONSTANTS_NULL_Abbrev)
2069 llvm_unreachable("Unexpected abbrev ordering!");
2072 // FIXME: This should only use space for first class types!
2074 { // INST_LOAD abbrev for FUNCTION_BLOCK.
2075 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
2076 Abbv->Add(BitCodeAbbrevOp(bitc::FUNC_CODE_INST_LOAD));
2077 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Ptr
2078 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 4)); // Align
2079 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // volatile
2080 if (Stream.EmitBlockInfoAbbrev(bitc::FUNCTION_BLOCK_ID,
2081 Abbv) != FUNCTION_INST_LOAD_ABBREV)
2082 llvm_unreachable("Unexpected abbrev ordering!");
2084 { // INST_BINOP abbrev for FUNCTION_BLOCK.
2085 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
2086 Abbv->Add(BitCodeAbbrevOp(bitc::FUNC_CODE_INST_BINOP));
2087 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // LHS
2088 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // RHS
2089 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 4)); // opc
2090 if (Stream.EmitBlockInfoAbbrev(bitc::FUNCTION_BLOCK_ID,
2091 Abbv) != FUNCTION_INST_BINOP_ABBREV)
2092 llvm_unreachable("Unexpected abbrev ordering!");
2094 { // INST_BINOP_FLAGS abbrev for FUNCTION_BLOCK.
2095 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
2096 Abbv->Add(BitCodeAbbrevOp(bitc::FUNC_CODE_INST_BINOP));
2097 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // LHS
2098 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // RHS
2099 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 4)); // opc
2100 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 7)); // flags
2101 if (Stream.EmitBlockInfoAbbrev(bitc::FUNCTION_BLOCK_ID,
2102 Abbv) != FUNCTION_INST_BINOP_FLAGS_ABBREV)
2103 llvm_unreachable("Unexpected abbrev ordering!");
2105 { // INST_CAST abbrev for FUNCTION_BLOCK.
2106 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
2107 Abbv->Add(BitCodeAbbrevOp(bitc::FUNC_CODE_INST_CAST));
2108 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // OpVal
2109 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, // dest ty
2110 Log2_32_Ceil(VE.getTypes().size()+1)));
2111 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 4)); // opc
2112 if (Stream.EmitBlockInfoAbbrev(bitc::FUNCTION_BLOCK_ID,
2113 Abbv) != FUNCTION_INST_CAST_ABBREV)
2114 llvm_unreachable("Unexpected abbrev ordering!");
2117 { // INST_RET abbrev for FUNCTION_BLOCK.
2118 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
2119 Abbv->Add(BitCodeAbbrevOp(bitc::FUNC_CODE_INST_RET));
2120 if (Stream.EmitBlockInfoAbbrev(bitc::FUNCTION_BLOCK_ID,
2121 Abbv) != FUNCTION_INST_RET_VOID_ABBREV)
2122 llvm_unreachable("Unexpected abbrev ordering!");
2124 { // INST_RET abbrev for FUNCTION_BLOCK.
2125 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
2126 Abbv->Add(BitCodeAbbrevOp(bitc::FUNC_CODE_INST_RET));
2127 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // ValID
2128 if (Stream.EmitBlockInfoAbbrev(bitc::FUNCTION_BLOCK_ID,
2129 Abbv) != FUNCTION_INST_RET_VAL_ABBREV)
2130 llvm_unreachable("Unexpected abbrev ordering!");
2132 { // INST_UNREACHABLE abbrev for FUNCTION_BLOCK.
2133 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
2134 Abbv->Add(BitCodeAbbrevOp(bitc::FUNC_CODE_INST_UNREACHABLE));
2135 if (Stream.EmitBlockInfoAbbrev(bitc::FUNCTION_BLOCK_ID,
2136 Abbv) != FUNCTION_INST_UNREACHABLE_ABBREV)
2137 llvm_unreachable("Unexpected abbrev ordering!");
2143 /// WriteModule - Emit the specified module to the bitstream.
2144 static void WriteModule(const Module *M, BitstreamWriter &Stream) {
2145 Stream.EnterSubblock(bitc::MODULE_BLOCK_ID, 3);
2147 SmallVector<unsigned, 1> Vals;
2148 unsigned CurVersion = 1;
2149 Vals.push_back(CurVersion);
2150 Stream.EmitRecord(bitc::MODULE_CODE_VERSION, Vals);
2152 // Analyze the module, enumerating globals, functions, etc.
2153 ValueEnumerator VE(*M);
2155 // Emit blockinfo, which defines the standard abbreviations etc.
2156 WriteBlockInfo(VE, Stream);
2158 // Emit information about attribute groups.
2159 WriteAttributeGroupTable(VE, Stream);
2161 // Emit information about parameter attributes.
2162 WriteAttributeTable(VE, Stream);
2164 // Emit information describing all of the types in the module.
2165 WriteTypeTable(VE, Stream);
2167 writeComdats(VE, Stream);
2169 // Emit top-level description of module, including target triple, inline asm,
2170 // descriptors for global variables, and function prototype info.
2171 WriteModuleInfo(M, VE, Stream);
2174 WriteModuleConstants(VE, Stream);
2177 WriteModuleMetadata(M, VE, Stream);
2180 WriteModuleMetadataStore(M, Stream);
2182 // Emit names for globals/functions etc.
2183 WriteValueSymbolTable(M->getValueSymbolTable(), VE, Stream);
2185 // Emit module-level use-lists.
2186 if (shouldPreserveBitcodeUseListOrder())
2187 WriteUseListBlock(nullptr, VE, Stream);
2189 // Emit function bodies.
2190 for (Module::const_iterator F = M->begin(), E = M->end(); F != E; ++F)
2191 if (!F->isDeclaration())
2192 WriteFunction(*F, VE, Stream);
2197 /// EmitDarwinBCHeader - If generating a bc file on darwin, we have to emit a
2198 /// header and trailer to make it compatible with the system archiver. To do
2199 /// this we emit the following header, and then emit a trailer that pads the
2200 /// file out to be a multiple of 16 bytes.
2202 /// struct bc_header {
2203 /// uint32_t Magic; // 0x0B17C0DE
2204 /// uint32_t Version; // Version, currently always 0.
2205 /// uint32_t BitcodeOffset; // Offset to traditional bitcode file.
2206 /// uint32_t BitcodeSize; // Size of traditional bitcode file.
2207 /// uint32_t CPUType; // CPU specifier.
2208 /// ... potentially more later ...
2211 DarwinBCSizeFieldOffset = 3*4, // Offset to bitcode_size.
2212 DarwinBCHeaderSize = 5*4
2215 static void WriteInt32ToBuffer(uint32_t Value, SmallVectorImpl<char> &Buffer,
2216 uint32_t &Position) {
2217 Buffer[Position + 0] = (unsigned char) (Value >> 0);
2218 Buffer[Position + 1] = (unsigned char) (Value >> 8);
2219 Buffer[Position + 2] = (unsigned char) (Value >> 16);
2220 Buffer[Position + 3] = (unsigned char) (Value >> 24);
2224 static void EmitDarwinBCHeaderAndTrailer(SmallVectorImpl<char> &Buffer,
2226 unsigned CPUType = ~0U;
2228 // Match x86_64-*, i[3-9]86-*, powerpc-*, powerpc64-*, arm-*, thumb-*,
2229 // armv[0-9]-*, thumbv[0-9]-*, armv5te-*, or armv6t2-*. The CPUType is a magic
2230 // number from /usr/include/mach/machine.h. It is ok to reproduce the
2231 // specific constants here because they are implicitly part of the Darwin ABI.
2233 DARWIN_CPU_ARCH_ABI64 = 0x01000000,
2234 DARWIN_CPU_TYPE_X86 = 7,
2235 DARWIN_CPU_TYPE_ARM = 12,
2236 DARWIN_CPU_TYPE_POWERPC = 18
2239 Triple::ArchType Arch = TT.getArch();
2240 if (Arch == Triple::x86_64)
2241 CPUType = DARWIN_CPU_TYPE_X86 | DARWIN_CPU_ARCH_ABI64;
2242 else if (Arch == Triple::x86)
2243 CPUType = DARWIN_CPU_TYPE_X86;
2244 else if (Arch == Triple::ppc)
2245 CPUType = DARWIN_CPU_TYPE_POWERPC;
2246 else if (Arch == Triple::ppc64)
2247 CPUType = DARWIN_CPU_TYPE_POWERPC | DARWIN_CPU_ARCH_ABI64;
2248 else if (Arch == Triple::arm || Arch == Triple::thumb)
2249 CPUType = DARWIN_CPU_TYPE_ARM;
2251 // Traditional Bitcode starts after header.
2252 assert(Buffer.size() >= DarwinBCHeaderSize &&
2253 "Expected header size to be reserved");
2254 unsigned BCOffset = DarwinBCHeaderSize;
2255 unsigned BCSize = Buffer.size()-DarwinBCHeaderSize;
2257 // Write the magic and version.
2258 unsigned Position = 0;
2259 WriteInt32ToBuffer(0x0B17C0DE , Buffer, Position);
2260 WriteInt32ToBuffer(0 , Buffer, Position); // Version.
2261 WriteInt32ToBuffer(BCOffset , Buffer, Position);
2262 WriteInt32ToBuffer(BCSize , Buffer, Position);
2263 WriteInt32ToBuffer(CPUType , Buffer, Position);
2265 // If the file is not a multiple of 16 bytes, insert dummy padding.
2266 while (Buffer.size() & 15)
2267 Buffer.push_back(0);
2270 /// WriteBitcodeToFile - Write the specified module to the specified output
2272 void llvm::WriteBitcodeToFile(const Module *M, raw_ostream &Out) {
2273 SmallVector<char, 0> Buffer;
2274 Buffer.reserve(256*1024);
2276 // If this is darwin or another generic macho target, reserve space for the
2278 Triple TT(M->getTargetTriple());
2279 if (TT.isOSDarwin())
2280 Buffer.insert(Buffer.begin(), DarwinBCHeaderSize, 0);
2282 // Emit the module into the buffer.
2284 BitstreamWriter Stream(Buffer);
2286 // Emit the file header.
2287 Stream.Emit((unsigned)'B', 8);
2288 Stream.Emit((unsigned)'C', 8);
2289 Stream.Emit(0x0, 4);
2290 Stream.Emit(0xC, 4);
2291 Stream.Emit(0xE, 4);
2292 Stream.Emit(0xD, 4);
2295 WriteModule(M, Stream);
2298 if (TT.isOSDarwin())
2299 EmitDarwinBCHeaderAndTrailer(Buffer, TT);
2301 // Write the generated bitstream to "Out".
2302 Out.write((char*)&Buffer.front(), Buffer.size());