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 *N,
905 const ValueEnumerator &VE,
906 BitstreamWriter &Stream,
907 SmallVectorImpl<uint64_t> &Record,
909 Record.push_back(N->isDistinct());
910 Record.push_back(N->getFlags());
911 Record.push_back(VE.getMetadataOrNullID(N->getTypeArray()));
913 Stream.EmitRecord(bitc::METADATA_SUBROUTINE_TYPE, Record, Abbrev);
917 static void WriteMDFile(const MDFile *N, const ValueEnumerator &VE,
918 BitstreamWriter &Stream,
919 SmallVectorImpl<uint64_t> &Record, unsigned Abbrev) {
920 Record.push_back(N->isDistinct());
921 Record.push_back(VE.getMetadataOrNullID(N->getRawFilename()));
922 Record.push_back(VE.getMetadataOrNullID(N->getRawDirectory()));
924 Stream.EmitRecord(bitc::METADATA_FILE, Record, Abbrev);
928 static void WriteMDCompileUnit(const MDCompileUnit *, const ValueEnumerator &,
929 BitstreamWriter &, SmallVectorImpl<uint64_t> &,
931 llvm_unreachable("write not implemented");
933 static void WriteMDSubprogram(const MDSubprogram *, const ValueEnumerator &,
934 BitstreamWriter &, SmallVectorImpl<uint64_t> &,
936 llvm_unreachable("write not implemented");
938 static void WriteMDLexicalBlock(const MDLexicalBlock *, const ValueEnumerator &,
939 BitstreamWriter &, SmallVectorImpl<uint64_t> &,
941 llvm_unreachable("write not implemented");
943 static void WriteMDLexicalBlockFile(const MDLexicalBlockFile *,
944 const ValueEnumerator &, BitstreamWriter &,
945 SmallVectorImpl<uint64_t> &, unsigned) {
946 llvm_unreachable("write not implemented");
948 static void WriteMDNamespace(const MDNamespace *, const ValueEnumerator &,
949 BitstreamWriter &, SmallVectorImpl<uint64_t> &,
951 llvm_unreachable("write not implemented");
953 static void WriteMDTemplateTypeParameter(const MDTemplateTypeParameter *,
954 const ValueEnumerator &,
956 SmallVectorImpl<uint64_t> &,
958 llvm_unreachable("write not implemented");
960 static void WriteMDTemplateValueParameter(const MDTemplateValueParameter *,
961 const ValueEnumerator &,
963 SmallVectorImpl<uint64_t> &,
965 llvm_unreachable("write not implemented");
967 static void WriteMDGlobalVariable(const MDGlobalVariable *,
968 const ValueEnumerator &, BitstreamWriter &,
969 SmallVectorImpl<uint64_t> &, unsigned) {
970 llvm_unreachable("write not implemented");
972 static void WriteMDLocalVariable(const MDLocalVariable *,
973 const ValueEnumerator &, BitstreamWriter &,
974 SmallVectorImpl<uint64_t> &, unsigned) {
975 llvm_unreachable("write not implemented");
977 static void WriteMDExpression(const MDExpression *, const ValueEnumerator &,
978 BitstreamWriter &, SmallVectorImpl<uint64_t> &,
980 llvm_unreachable("write not implemented");
982 static void WriteMDObjCProperty(const MDObjCProperty *, const ValueEnumerator &,
983 BitstreamWriter &, SmallVectorImpl<uint64_t> &,
985 llvm_unreachable("write not implemented");
987 static void WriteMDImportedEntity(const MDImportedEntity *,
988 const ValueEnumerator &, BitstreamWriter &,
989 SmallVectorImpl<uint64_t> &, unsigned) {
990 llvm_unreachable("write not implemented");
993 static void WriteModuleMetadata(const Module *M,
994 const ValueEnumerator &VE,
995 BitstreamWriter &Stream) {
996 const auto &MDs = VE.getMDs();
997 if (MDs.empty() && M->named_metadata_empty())
1000 Stream.EnterSubblock(bitc::METADATA_BLOCK_ID, 3);
1002 unsigned MDSAbbrev = 0;
1003 if (VE.hasMDString()) {
1004 // Abbrev for METADATA_STRING.
1005 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
1006 Abbv->Add(BitCodeAbbrevOp(bitc::METADATA_STRING));
1007 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
1008 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 8));
1009 MDSAbbrev = Stream.EmitAbbrev(Abbv);
1012 // Initialize MDNode abbreviations.
1013 #define HANDLE_MDNODE_LEAF(CLASS) unsigned CLASS##Abbrev = 0;
1014 #include "llvm/IR/Metadata.def"
1016 if (VE.hasMDLocation()) {
1017 // Abbrev for METADATA_LOCATION.
1019 // Assume the column is usually under 128, and always output the inlined-at
1020 // location (it's never more expensive than building an array size 1).
1021 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
1022 Abbv->Add(BitCodeAbbrevOp(bitc::METADATA_LOCATION));
1023 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1));
1024 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));
1025 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8));
1026 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));
1027 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));
1028 MDLocationAbbrev = Stream.EmitAbbrev(Abbv);
1031 if (VE.hasGenericDebugNode()) {
1032 // Abbrev for METADATA_GENERIC_DEBUG.
1034 // Assume the column is usually under 128, and always output the inlined-at
1035 // location (it's never more expensive than building an array size 1).
1036 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
1037 Abbv->Add(BitCodeAbbrevOp(bitc::METADATA_GENERIC_DEBUG));
1038 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1));
1039 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));
1040 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1));
1041 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));
1042 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
1043 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));
1044 GenericDebugNodeAbbrev = Stream.EmitAbbrev(Abbv);
1047 unsigned NameAbbrev = 0;
1048 if (!M->named_metadata_empty()) {
1049 // Abbrev for METADATA_NAME.
1050 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
1051 Abbv->Add(BitCodeAbbrevOp(bitc::METADATA_NAME));
1052 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
1053 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 8));
1054 NameAbbrev = Stream.EmitAbbrev(Abbv);
1057 SmallVector<uint64_t, 64> Record;
1058 for (const Metadata *MD : MDs) {
1059 if (const MDNode *N = dyn_cast<MDNode>(MD)) {
1060 switch (N->getMetadataID()) {
1062 llvm_unreachable("Invalid MDNode subclass");
1063 #define HANDLE_MDNODE_LEAF(CLASS) \
1064 case Metadata::CLASS##Kind: \
1065 Write##CLASS(cast<CLASS>(N), VE, Stream, Record, CLASS##Abbrev); \
1067 #include "llvm/IR/Metadata.def"
1070 if (const auto *MDC = dyn_cast<ConstantAsMetadata>(MD)) {
1071 WriteValueAsMetadata(MDC, VE, Stream, Record);
1074 const MDString *MDS = cast<MDString>(MD);
1075 // Code: [strchar x N]
1076 Record.append(MDS->bytes_begin(), MDS->bytes_end());
1078 // Emit the finished record.
1079 Stream.EmitRecord(bitc::METADATA_STRING, Record, MDSAbbrev);
1083 // Write named metadata.
1084 for (const NamedMDNode &NMD : M->named_metadata()) {
1086 StringRef Str = NMD.getName();
1087 Record.append(Str.bytes_begin(), Str.bytes_end());
1088 Stream.EmitRecord(bitc::METADATA_NAME, Record, NameAbbrev);
1091 // Write named metadata operands.
1092 for (const MDNode *N : NMD.operands())
1093 Record.push_back(VE.getMetadataID(N));
1094 Stream.EmitRecord(bitc::METADATA_NAMED_NODE, Record, 0);
1101 static void WriteFunctionLocalMetadata(const Function &F,
1102 const ValueEnumerator &VE,
1103 BitstreamWriter &Stream) {
1104 bool StartedMetadataBlock = false;
1105 SmallVector<uint64_t, 64> Record;
1106 const SmallVectorImpl<const LocalAsMetadata *> &MDs =
1107 VE.getFunctionLocalMDs();
1108 for (unsigned i = 0, e = MDs.size(); i != e; ++i) {
1109 assert(MDs[i] && "Expected valid function-local metadata");
1110 if (!StartedMetadataBlock) {
1111 Stream.EnterSubblock(bitc::METADATA_BLOCK_ID, 3);
1112 StartedMetadataBlock = true;
1114 WriteValueAsMetadata(MDs[i], VE, Stream, Record);
1117 if (StartedMetadataBlock)
1121 static void WriteMetadataAttachment(const Function &F,
1122 const ValueEnumerator &VE,
1123 BitstreamWriter &Stream) {
1124 Stream.EnterSubblock(bitc::METADATA_ATTACHMENT_ID, 3);
1126 SmallVector<uint64_t, 64> Record;
1128 // Write metadata attachments
1129 // METADATA_ATTACHMENT - [m x [value, [n x [id, mdnode]]]
1130 SmallVector<std::pair<unsigned, MDNode *>, 4> MDs;
1132 for (Function::const_iterator BB = F.begin(), E = F.end(); BB != E; ++BB)
1133 for (BasicBlock::const_iterator I = BB->begin(), E = BB->end();
1136 I->getAllMetadataOtherThanDebugLoc(MDs);
1138 // If no metadata, ignore instruction.
1139 if (MDs.empty()) continue;
1141 Record.push_back(VE.getInstructionID(I));
1143 for (unsigned i = 0, e = MDs.size(); i != e; ++i) {
1144 Record.push_back(MDs[i].first);
1145 Record.push_back(VE.getMetadataID(MDs[i].second));
1147 Stream.EmitRecord(bitc::METADATA_ATTACHMENT, Record, 0);
1154 static void WriteModuleMetadataStore(const Module *M, BitstreamWriter &Stream) {
1155 SmallVector<uint64_t, 64> Record;
1157 // Write metadata kinds
1158 // METADATA_KIND - [n x [id, name]]
1159 SmallVector<StringRef, 8> Names;
1160 M->getMDKindNames(Names);
1162 if (Names.empty()) return;
1164 Stream.EnterSubblock(bitc::METADATA_BLOCK_ID, 3);
1166 for (unsigned MDKindID = 0, e = Names.size(); MDKindID != e; ++MDKindID) {
1167 Record.push_back(MDKindID);
1168 StringRef KName = Names[MDKindID];
1169 Record.append(KName.begin(), KName.end());
1171 Stream.EmitRecord(bitc::METADATA_KIND, Record, 0);
1178 static void emitSignedInt64(SmallVectorImpl<uint64_t> &Vals, uint64_t V) {
1179 if ((int64_t)V >= 0)
1180 Vals.push_back(V << 1);
1182 Vals.push_back((-V << 1) | 1);
1185 static void WriteConstants(unsigned FirstVal, unsigned LastVal,
1186 const ValueEnumerator &VE,
1187 BitstreamWriter &Stream, bool isGlobal) {
1188 if (FirstVal == LastVal) return;
1190 Stream.EnterSubblock(bitc::CONSTANTS_BLOCK_ID, 4);
1192 unsigned AggregateAbbrev = 0;
1193 unsigned String8Abbrev = 0;
1194 unsigned CString7Abbrev = 0;
1195 unsigned CString6Abbrev = 0;
1196 // If this is a constant pool for the module, emit module-specific abbrevs.
1198 // Abbrev for CST_CODE_AGGREGATE.
1199 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
1200 Abbv->Add(BitCodeAbbrevOp(bitc::CST_CODE_AGGREGATE));
1201 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
1202 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, Log2_32_Ceil(LastVal+1)));
1203 AggregateAbbrev = Stream.EmitAbbrev(Abbv);
1205 // Abbrev for CST_CODE_STRING.
1206 Abbv = new BitCodeAbbrev();
1207 Abbv->Add(BitCodeAbbrevOp(bitc::CST_CODE_STRING));
1208 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
1209 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 8));
1210 String8Abbrev = Stream.EmitAbbrev(Abbv);
1211 // Abbrev for CST_CODE_CSTRING.
1212 Abbv = new BitCodeAbbrev();
1213 Abbv->Add(BitCodeAbbrevOp(bitc::CST_CODE_CSTRING));
1214 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
1215 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 7));
1216 CString7Abbrev = Stream.EmitAbbrev(Abbv);
1217 // Abbrev for CST_CODE_CSTRING.
1218 Abbv = new BitCodeAbbrev();
1219 Abbv->Add(BitCodeAbbrevOp(bitc::CST_CODE_CSTRING));
1220 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
1221 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Char6));
1222 CString6Abbrev = Stream.EmitAbbrev(Abbv);
1225 SmallVector<uint64_t, 64> Record;
1227 const ValueEnumerator::ValueList &Vals = VE.getValues();
1228 Type *LastTy = nullptr;
1229 for (unsigned i = FirstVal; i != LastVal; ++i) {
1230 const Value *V = Vals[i].first;
1231 // If we need to switch types, do so now.
1232 if (V->getType() != LastTy) {
1233 LastTy = V->getType();
1234 Record.push_back(VE.getTypeID(LastTy));
1235 Stream.EmitRecord(bitc::CST_CODE_SETTYPE, Record,
1236 CONSTANTS_SETTYPE_ABBREV);
1240 if (const InlineAsm *IA = dyn_cast<InlineAsm>(V)) {
1241 Record.push_back(unsigned(IA->hasSideEffects()) |
1242 unsigned(IA->isAlignStack()) << 1 |
1243 unsigned(IA->getDialect()&1) << 2);
1245 // Add the asm string.
1246 const std::string &AsmStr = IA->getAsmString();
1247 Record.push_back(AsmStr.size());
1248 for (unsigned i = 0, e = AsmStr.size(); i != e; ++i)
1249 Record.push_back(AsmStr[i]);
1251 // Add the constraint string.
1252 const std::string &ConstraintStr = IA->getConstraintString();
1253 Record.push_back(ConstraintStr.size());
1254 for (unsigned i = 0, e = ConstraintStr.size(); i != e; ++i)
1255 Record.push_back(ConstraintStr[i]);
1256 Stream.EmitRecord(bitc::CST_CODE_INLINEASM, Record);
1260 const Constant *C = cast<Constant>(V);
1261 unsigned Code = -1U;
1262 unsigned AbbrevToUse = 0;
1263 if (C->isNullValue()) {
1264 Code = bitc::CST_CODE_NULL;
1265 } else if (isa<UndefValue>(C)) {
1266 Code = bitc::CST_CODE_UNDEF;
1267 } else if (const ConstantInt *IV = dyn_cast<ConstantInt>(C)) {
1268 if (IV->getBitWidth() <= 64) {
1269 uint64_t V = IV->getSExtValue();
1270 emitSignedInt64(Record, V);
1271 Code = bitc::CST_CODE_INTEGER;
1272 AbbrevToUse = CONSTANTS_INTEGER_ABBREV;
1273 } else { // Wide integers, > 64 bits in size.
1274 // We have an arbitrary precision integer value to write whose
1275 // bit width is > 64. However, in canonical unsigned integer
1276 // format it is likely that the high bits are going to be zero.
1277 // So, we only write the number of active words.
1278 unsigned NWords = IV->getValue().getActiveWords();
1279 const uint64_t *RawWords = IV->getValue().getRawData();
1280 for (unsigned i = 0; i != NWords; ++i) {
1281 emitSignedInt64(Record, RawWords[i]);
1283 Code = bitc::CST_CODE_WIDE_INTEGER;
1285 } else if (const ConstantFP *CFP = dyn_cast<ConstantFP>(C)) {
1286 Code = bitc::CST_CODE_FLOAT;
1287 Type *Ty = CFP->getType();
1288 if (Ty->isHalfTy() || Ty->isFloatTy() || Ty->isDoubleTy()) {
1289 Record.push_back(CFP->getValueAPF().bitcastToAPInt().getZExtValue());
1290 } else if (Ty->isX86_FP80Ty()) {
1291 // api needed to prevent premature destruction
1292 // bits are not in the same order as a normal i80 APInt, compensate.
1293 APInt api = CFP->getValueAPF().bitcastToAPInt();
1294 const uint64_t *p = api.getRawData();
1295 Record.push_back((p[1] << 48) | (p[0] >> 16));
1296 Record.push_back(p[0] & 0xffffLL);
1297 } else if (Ty->isFP128Ty() || Ty->isPPC_FP128Ty()) {
1298 APInt api = CFP->getValueAPF().bitcastToAPInt();
1299 const uint64_t *p = api.getRawData();
1300 Record.push_back(p[0]);
1301 Record.push_back(p[1]);
1303 assert (0 && "Unknown FP type!");
1305 } else if (isa<ConstantDataSequential>(C) &&
1306 cast<ConstantDataSequential>(C)->isString()) {
1307 const ConstantDataSequential *Str = cast<ConstantDataSequential>(C);
1308 // Emit constant strings specially.
1309 unsigned NumElts = Str->getNumElements();
1310 // If this is a null-terminated string, use the denser CSTRING encoding.
1311 if (Str->isCString()) {
1312 Code = bitc::CST_CODE_CSTRING;
1313 --NumElts; // Don't encode the null, which isn't allowed by char6.
1315 Code = bitc::CST_CODE_STRING;
1316 AbbrevToUse = String8Abbrev;
1318 bool isCStr7 = Code == bitc::CST_CODE_CSTRING;
1319 bool isCStrChar6 = Code == bitc::CST_CODE_CSTRING;
1320 for (unsigned i = 0; i != NumElts; ++i) {
1321 unsigned char V = Str->getElementAsInteger(i);
1322 Record.push_back(V);
1323 isCStr7 &= (V & 128) == 0;
1325 isCStrChar6 = BitCodeAbbrevOp::isChar6(V);
1329 AbbrevToUse = CString6Abbrev;
1331 AbbrevToUse = CString7Abbrev;
1332 } else if (const ConstantDataSequential *CDS =
1333 dyn_cast<ConstantDataSequential>(C)) {
1334 Code = bitc::CST_CODE_DATA;
1335 Type *EltTy = CDS->getType()->getElementType();
1336 if (isa<IntegerType>(EltTy)) {
1337 for (unsigned i = 0, e = CDS->getNumElements(); i != e; ++i)
1338 Record.push_back(CDS->getElementAsInteger(i));
1339 } else if (EltTy->isFloatTy()) {
1340 for (unsigned i = 0, e = CDS->getNumElements(); i != e; ++i) {
1341 union { float F; uint32_t I; };
1342 F = CDS->getElementAsFloat(i);
1343 Record.push_back(I);
1346 assert(EltTy->isDoubleTy() && "Unknown ConstantData element type");
1347 for (unsigned i = 0, e = CDS->getNumElements(); i != e; ++i) {
1348 union { double F; uint64_t I; };
1349 F = CDS->getElementAsDouble(i);
1350 Record.push_back(I);
1353 } else if (isa<ConstantArray>(C) || isa<ConstantStruct>(C) ||
1354 isa<ConstantVector>(C)) {
1355 Code = bitc::CST_CODE_AGGREGATE;
1356 for (unsigned i = 0, e = C->getNumOperands(); i != e; ++i)
1357 Record.push_back(VE.getValueID(C->getOperand(i)));
1358 AbbrevToUse = AggregateAbbrev;
1359 } else if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(C)) {
1360 switch (CE->getOpcode()) {
1362 if (Instruction::isCast(CE->getOpcode())) {
1363 Code = bitc::CST_CODE_CE_CAST;
1364 Record.push_back(GetEncodedCastOpcode(CE->getOpcode()));
1365 Record.push_back(VE.getTypeID(C->getOperand(0)->getType()));
1366 Record.push_back(VE.getValueID(C->getOperand(0)));
1367 AbbrevToUse = CONSTANTS_CE_CAST_Abbrev;
1369 assert(CE->getNumOperands() == 2 && "Unknown constant expr!");
1370 Code = bitc::CST_CODE_CE_BINOP;
1371 Record.push_back(GetEncodedBinaryOpcode(CE->getOpcode()));
1372 Record.push_back(VE.getValueID(C->getOperand(0)));
1373 Record.push_back(VE.getValueID(C->getOperand(1)));
1374 uint64_t Flags = GetOptimizationFlags(CE);
1376 Record.push_back(Flags);
1379 case Instruction::GetElementPtr:
1380 Code = bitc::CST_CODE_CE_GEP;
1381 if (cast<GEPOperator>(C)->isInBounds())
1382 Code = bitc::CST_CODE_CE_INBOUNDS_GEP;
1383 for (unsigned i = 0, e = CE->getNumOperands(); i != e; ++i) {
1384 Record.push_back(VE.getTypeID(C->getOperand(i)->getType()));
1385 Record.push_back(VE.getValueID(C->getOperand(i)));
1388 case Instruction::Select:
1389 Code = bitc::CST_CODE_CE_SELECT;
1390 Record.push_back(VE.getValueID(C->getOperand(0)));
1391 Record.push_back(VE.getValueID(C->getOperand(1)));
1392 Record.push_back(VE.getValueID(C->getOperand(2)));
1394 case Instruction::ExtractElement:
1395 Code = bitc::CST_CODE_CE_EXTRACTELT;
1396 Record.push_back(VE.getTypeID(C->getOperand(0)->getType()));
1397 Record.push_back(VE.getValueID(C->getOperand(0)));
1398 Record.push_back(VE.getTypeID(C->getOperand(1)->getType()));
1399 Record.push_back(VE.getValueID(C->getOperand(1)));
1401 case Instruction::InsertElement:
1402 Code = bitc::CST_CODE_CE_INSERTELT;
1403 Record.push_back(VE.getValueID(C->getOperand(0)));
1404 Record.push_back(VE.getValueID(C->getOperand(1)));
1405 Record.push_back(VE.getTypeID(C->getOperand(2)->getType()));
1406 Record.push_back(VE.getValueID(C->getOperand(2)));
1408 case Instruction::ShuffleVector:
1409 // If the return type and argument types are the same, this is a
1410 // standard shufflevector instruction. If the types are different,
1411 // then the shuffle is widening or truncating the input vectors, and
1412 // the argument type must also be encoded.
1413 if (C->getType() == C->getOperand(0)->getType()) {
1414 Code = bitc::CST_CODE_CE_SHUFFLEVEC;
1416 Code = bitc::CST_CODE_CE_SHUFVEC_EX;
1417 Record.push_back(VE.getTypeID(C->getOperand(0)->getType()));
1419 Record.push_back(VE.getValueID(C->getOperand(0)));
1420 Record.push_back(VE.getValueID(C->getOperand(1)));
1421 Record.push_back(VE.getValueID(C->getOperand(2)));
1423 case Instruction::ICmp:
1424 case Instruction::FCmp:
1425 Code = bitc::CST_CODE_CE_CMP;
1426 Record.push_back(VE.getTypeID(C->getOperand(0)->getType()));
1427 Record.push_back(VE.getValueID(C->getOperand(0)));
1428 Record.push_back(VE.getValueID(C->getOperand(1)));
1429 Record.push_back(CE->getPredicate());
1432 } else if (const BlockAddress *BA = dyn_cast<BlockAddress>(C)) {
1433 Code = bitc::CST_CODE_BLOCKADDRESS;
1434 Record.push_back(VE.getTypeID(BA->getFunction()->getType()));
1435 Record.push_back(VE.getValueID(BA->getFunction()));
1436 Record.push_back(VE.getGlobalBasicBlockID(BA->getBasicBlock()));
1441 llvm_unreachable("Unknown constant!");
1443 Stream.EmitRecord(Code, Record, AbbrevToUse);
1450 static void WriteModuleConstants(const ValueEnumerator &VE,
1451 BitstreamWriter &Stream) {
1452 const ValueEnumerator::ValueList &Vals = VE.getValues();
1454 // Find the first constant to emit, which is the first non-globalvalue value.
1455 // We know globalvalues have been emitted by WriteModuleInfo.
1456 for (unsigned i = 0, e = Vals.size(); i != e; ++i) {
1457 if (!isa<GlobalValue>(Vals[i].first)) {
1458 WriteConstants(i, Vals.size(), VE, Stream, true);
1464 /// PushValueAndType - The file has to encode both the value and type id for
1465 /// many values, because we need to know what type to create for forward
1466 /// references. However, most operands are not forward references, so this type
1467 /// field is not needed.
1469 /// This function adds V's value ID to Vals. If the value ID is higher than the
1470 /// instruction ID, then it is a forward reference, and it also includes the
1471 /// type ID. The value ID that is written is encoded relative to the InstID.
1472 static bool PushValueAndType(const Value *V, unsigned InstID,
1473 SmallVectorImpl<unsigned> &Vals,
1474 ValueEnumerator &VE) {
1475 unsigned ValID = VE.getValueID(V);
1476 // Make encoding relative to the InstID.
1477 Vals.push_back(InstID - ValID);
1478 if (ValID >= InstID) {
1479 Vals.push_back(VE.getTypeID(V->getType()));
1485 /// pushValue - Like PushValueAndType, but where the type of the value is
1486 /// omitted (perhaps it was already encoded in an earlier operand).
1487 static void pushValue(const Value *V, unsigned InstID,
1488 SmallVectorImpl<unsigned> &Vals,
1489 ValueEnumerator &VE) {
1490 unsigned ValID = VE.getValueID(V);
1491 Vals.push_back(InstID - ValID);
1494 static void pushValueSigned(const Value *V, unsigned InstID,
1495 SmallVectorImpl<uint64_t> &Vals,
1496 ValueEnumerator &VE) {
1497 unsigned ValID = VE.getValueID(V);
1498 int64_t diff = ((int32_t)InstID - (int32_t)ValID);
1499 emitSignedInt64(Vals, diff);
1502 /// WriteInstruction - Emit an instruction to the specified stream.
1503 static void WriteInstruction(const Instruction &I, unsigned InstID,
1504 ValueEnumerator &VE, BitstreamWriter &Stream,
1505 SmallVectorImpl<unsigned> &Vals) {
1507 unsigned AbbrevToUse = 0;
1508 VE.setInstructionID(&I);
1509 switch (I.getOpcode()) {
1511 if (Instruction::isCast(I.getOpcode())) {
1512 Code = bitc::FUNC_CODE_INST_CAST;
1513 if (!PushValueAndType(I.getOperand(0), InstID, Vals, VE))
1514 AbbrevToUse = FUNCTION_INST_CAST_ABBREV;
1515 Vals.push_back(VE.getTypeID(I.getType()));
1516 Vals.push_back(GetEncodedCastOpcode(I.getOpcode()));
1518 assert(isa<BinaryOperator>(I) && "Unknown instruction!");
1519 Code = bitc::FUNC_CODE_INST_BINOP;
1520 if (!PushValueAndType(I.getOperand(0), InstID, Vals, VE))
1521 AbbrevToUse = FUNCTION_INST_BINOP_ABBREV;
1522 pushValue(I.getOperand(1), InstID, Vals, VE);
1523 Vals.push_back(GetEncodedBinaryOpcode(I.getOpcode()));
1524 uint64_t Flags = GetOptimizationFlags(&I);
1526 if (AbbrevToUse == FUNCTION_INST_BINOP_ABBREV)
1527 AbbrevToUse = FUNCTION_INST_BINOP_FLAGS_ABBREV;
1528 Vals.push_back(Flags);
1533 case Instruction::GetElementPtr:
1534 Code = bitc::FUNC_CODE_INST_GEP;
1535 if (cast<GEPOperator>(&I)->isInBounds())
1536 Code = bitc::FUNC_CODE_INST_INBOUNDS_GEP;
1537 for (unsigned i = 0, e = I.getNumOperands(); i != e; ++i)
1538 PushValueAndType(I.getOperand(i), InstID, Vals, VE);
1540 case Instruction::ExtractValue: {
1541 Code = bitc::FUNC_CODE_INST_EXTRACTVAL;
1542 PushValueAndType(I.getOperand(0), InstID, Vals, VE);
1543 const ExtractValueInst *EVI = cast<ExtractValueInst>(&I);
1544 for (const unsigned *i = EVI->idx_begin(), *e = EVI->idx_end(); i != e; ++i)
1548 case Instruction::InsertValue: {
1549 Code = bitc::FUNC_CODE_INST_INSERTVAL;
1550 PushValueAndType(I.getOperand(0), InstID, Vals, VE);
1551 PushValueAndType(I.getOperand(1), InstID, Vals, VE);
1552 const InsertValueInst *IVI = cast<InsertValueInst>(&I);
1553 for (const unsigned *i = IVI->idx_begin(), *e = IVI->idx_end(); i != e; ++i)
1557 case Instruction::Select:
1558 Code = bitc::FUNC_CODE_INST_VSELECT;
1559 PushValueAndType(I.getOperand(1), InstID, Vals, VE);
1560 pushValue(I.getOperand(2), InstID, Vals, VE);
1561 PushValueAndType(I.getOperand(0), InstID, Vals, VE);
1563 case Instruction::ExtractElement:
1564 Code = bitc::FUNC_CODE_INST_EXTRACTELT;
1565 PushValueAndType(I.getOperand(0), InstID, Vals, VE);
1566 PushValueAndType(I.getOperand(1), InstID, Vals, VE);
1568 case Instruction::InsertElement:
1569 Code = bitc::FUNC_CODE_INST_INSERTELT;
1570 PushValueAndType(I.getOperand(0), InstID, Vals, VE);
1571 pushValue(I.getOperand(1), InstID, Vals, VE);
1572 PushValueAndType(I.getOperand(2), InstID, Vals, VE);
1574 case Instruction::ShuffleVector:
1575 Code = bitc::FUNC_CODE_INST_SHUFFLEVEC;
1576 PushValueAndType(I.getOperand(0), InstID, Vals, VE);
1577 pushValue(I.getOperand(1), InstID, Vals, VE);
1578 pushValue(I.getOperand(2), InstID, Vals, VE);
1580 case Instruction::ICmp:
1581 case Instruction::FCmp:
1582 // compare returning Int1Ty or vector of Int1Ty
1583 Code = bitc::FUNC_CODE_INST_CMP2;
1584 PushValueAndType(I.getOperand(0), InstID, Vals, VE);
1585 pushValue(I.getOperand(1), InstID, Vals, VE);
1586 Vals.push_back(cast<CmpInst>(I).getPredicate());
1589 case Instruction::Ret:
1591 Code = bitc::FUNC_CODE_INST_RET;
1592 unsigned NumOperands = I.getNumOperands();
1593 if (NumOperands == 0)
1594 AbbrevToUse = FUNCTION_INST_RET_VOID_ABBREV;
1595 else if (NumOperands == 1) {
1596 if (!PushValueAndType(I.getOperand(0), InstID, Vals, VE))
1597 AbbrevToUse = FUNCTION_INST_RET_VAL_ABBREV;
1599 for (unsigned i = 0, e = NumOperands; i != e; ++i)
1600 PushValueAndType(I.getOperand(i), InstID, Vals, VE);
1604 case Instruction::Br:
1606 Code = bitc::FUNC_CODE_INST_BR;
1607 const BranchInst &II = cast<BranchInst>(I);
1608 Vals.push_back(VE.getValueID(II.getSuccessor(0)));
1609 if (II.isConditional()) {
1610 Vals.push_back(VE.getValueID(II.getSuccessor(1)));
1611 pushValue(II.getCondition(), InstID, Vals, VE);
1615 case Instruction::Switch:
1617 Code = bitc::FUNC_CODE_INST_SWITCH;
1618 const SwitchInst &SI = cast<SwitchInst>(I);
1619 Vals.push_back(VE.getTypeID(SI.getCondition()->getType()));
1620 pushValue(SI.getCondition(), InstID, Vals, VE);
1621 Vals.push_back(VE.getValueID(SI.getDefaultDest()));
1622 for (SwitchInst::ConstCaseIt i = SI.case_begin(), e = SI.case_end();
1624 Vals.push_back(VE.getValueID(i.getCaseValue()));
1625 Vals.push_back(VE.getValueID(i.getCaseSuccessor()));
1629 case Instruction::IndirectBr:
1630 Code = bitc::FUNC_CODE_INST_INDIRECTBR;
1631 Vals.push_back(VE.getTypeID(I.getOperand(0)->getType()));
1632 // Encode the address operand as relative, but not the basic blocks.
1633 pushValue(I.getOperand(0), InstID, Vals, VE);
1634 for (unsigned i = 1, e = I.getNumOperands(); i != e; ++i)
1635 Vals.push_back(VE.getValueID(I.getOperand(i)));
1638 case Instruction::Invoke: {
1639 const InvokeInst *II = cast<InvokeInst>(&I);
1640 const Value *Callee(II->getCalledValue());
1641 PointerType *PTy = cast<PointerType>(Callee->getType());
1642 FunctionType *FTy = cast<FunctionType>(PTy->getElementType());
1643 Code = bitc::FUNC_CODE_INST_INVOKE;
1645 Vals.push_back(VE.getAttributeID(II->getAttributes()));
1646 Vals.push_back(II->getCallingConv());
1647 Vals.push_back(VE.getValueID(II->getNormalDest()));
1648 Vals.push_back(VE.getValueID(II->getUnwindDest()));
1649 PushValueAndType(Callee, InstID, Vals, VE);
1651 // Emit value #'s for the fixed parameters.
1652 for (unsigned i = 0, e = FTy->getNumParams(); i != e; ++i)
1653 pushValue(I.getOperand(i), InstID, Vals, VE); // fixed param.
1655 // Emit type/value pairs for varargs params.
1656 if (FTy->isVarArg()) {
1657 for (unsigned i = FTy->getNumParams(), e = I.getNumOperands()-3;
1659 PushValueAndType(I.getOperand(i), InstID, Vals, VE); // vararg
1663 case Instruction::Resume:
1664 Code = bitc::FUNC_CODE_INST_RESUME;
1665 PushValueAndType(I.getOperand(0), InstID, Vals, VE);
1667 case Instruction::Unreachable:
1668 Code = bitc::FUNC_CODE_INST_UNREACHABLE;
1669 AbbrevToUse = FUNCTION_INST_UNREACHABLE_ABBREV;
1672 case Instruction::PHI: {
1673 const PHINode &PN = cast<PHINode>(I);
1674 Code = bitc::FUNC_CODE_INST_PHI;
1675 // With the newer instruction encoding, forward references could give
1676 // negative valued IDs. This is most common for PHIs, so we use
1678 SmallVector<uint64_t, 128> Vals64;
1679 Vals64.push_back(VE.getTypeID(PN.getType()));
1680 for (unsigned i = 0, e = PN.getNumIncomingValues(); i != e; ++i) {
1681 pushValueSigned(PN.getIncomingValue(i), InstID, Vals64, VE);
1682 Vals64.push_back(VE.getValueID(PN.getIncomingBlock(i)));
1684 // Emit a Vals64 vector and exit.
1685 Stream.EmitRecord(Code, Vals64, AbbrevToUse);
1690 case Instruction::LandingPad: {
1691 const LandingPadInst &LP = cast<LandingPadInst>(I);
1692 Code = bitc::FUNC_CODE_INST_LANDINGPAD;
1693 Vals.push_back(VE.getTypeID(LP.getType()));
1694 PushValueAndType(LP.getPersonalityFn(), InstID, Vals, VE);
1695 Vals.push_back(LP.isCleanup());
1696 Vals.push_back(LP.getNumClauses());
1697 for (unsigned I = 0, E = LP.getNumClauses(); I != E; ++I) {
1699 Vals.push_back(LandingPadInst::Catch);
1701 Vals.push_back(LandingPadInst::Filter);
1702 PushValueAndType(LP.getClause(I), InstID, Vals, VE);
1707 case Instruction::Alloca: {
1708 Code = bitc::FUNC_CODE_INST_ALLOCA;
1709 Vals.push_back(VE.getTypeID(I.getType()));
1710 Vals.push_back(VE.getTypeID(I.getOperand(0)->getType()));
1711 Vals.push_back(VE.getValueID(I.getOperand(0))); // size.
1712 const AllocaInst &AI = cast<AllocaInst>(I);
1713 unsigned AlignRecord = Log2_32(AI.getAlignment()) + 1;
1714 assert(Log2_32(Value::MaximumAlignment) + 1 < 1 << 5 &&
1715 "not enough bits for maximum alignment");
1716 assert(AlignRecord < 1 << 5 && "alignment greater than 1 << 64");
1717 AlignRecord |= AI.isUsedWithInAlloca() << 5;
1718 Vals.push_back(AlignRecord);
1722 case Instruction::Load:
1723 if (cast<LoadInst>(I).isAtomic()) {
1724 Code = bitc::FUNC_CODE_INST_LOADATOMIC;
1725 PushValueAndType(I.getOperand(0), InstID, Vals, VE);
1727 Code = bitc::FUNC_CODE_INST_LOAD;
1728 if (!PushValueAndType(I.getOperand(0), InstID, Vals, VE)) // ptr
1729 AbbrevToUse = FUNCTION_INST_LOAD_ABBREV;
1731 Vals.push_back(Log2_32(cast<LoadInst>(I).getAlignment())+1);
1732 Vals.push_back(cast<LoadInst>(I).isVolatile());
1733 if (cast<LoadInst>(I).isAtomic()) {
1734 Vals.push_back(GetEncodedOrdering(cast<LoadInst>(I).getOrdering()));
1735 Vals.push_back(GetEncodedSynchScope(cast<LoadInst>(I).getSynchScope()));
1738 case Instruction::Store:
1739 if (cast<StoreInst>(I).isAtomic())
1740 Code = bitc::FUNC_CODE_INST_STOREATOMIC;
1742 Code = bitc::FUNC_CODE_INST_STORE;
1743 PushValueAndType(I.getOperand(1), InstID, Vals, VE); // ptrty + ptr
1744 pushValue(I.getOperand(0), InstID, Vals, VE); // val.
1745 Vals.push_back(Log2_32(cast<StoreInst>(I).getAlignment())+1);
1746 Vals.push_back(cast<StoreInst>(I).isVolatile());
1747 if (cast<StoreInst>(I).isAtomic()) {
1748 Vals.push_back(GetEncodedOrdering(cast<StoreInst>(I).getOrdering()));
1749 Vals.push_back(GetEncodedSynchScope(cast<StoreInst>(I).getSynchScope()));
1752 case Instruction::AtomicCmpXchg:
1753 Code = bitc::FUNC_CODE_INST_CMPXCHG;
1754 PushValueAndType(I.getOperand(0), InstID, Vals, VE); // ptrty + ptr
1755 pushValue(I.getOperand(1), InstID, Vals, VE); // cmp.
1756 pushValue(I.getOperand(2), InstID, Vals, VE); // newval.
1757 Vals.push_back(cast<AtomicCmpXchgInst>(I).isVolatile());
1758 Vals.push_back(GetEncodedOrdering(
1759 cast<AtomicCmpXchgInst>(I).getSuccessOrdering()));
1760 Vals.push_back(GetEncodedSynchScope(
1761 cast<AtomicCmpXchgInst>(I).getSynchScope()));
1762 Vals.push_back(GetEncodedOrdering(
1763 cast<AtomicCmpXchgInst>(I).getFailureOrdering()));
1764 Vals.push_back(cast<AtomicCmpXchgInst>(I).isWeak());
1766 case Instruction::AtomicRMW:
1767 Code = bitc::FUNC_CODE_INST_ATOMICRMW;
1768 PushValueAndType(I.getOperand(0), InstID, Vals, VE); // ptrty + ptr
1769 pushValue(I.getOperand(1), InstID, Vals, VE); // val.
1770 Vals.push_back(GetEncodedRMWOperation(
1771 cast<AtomicRMWInst>(I).getOperation()));
1772 Vals.push_back(cast<AtomicRMWInst>(I).isVolatile());
1773 Vals.push_back(GetEncodedOrdering(cast<AtomicRMWInst>(I).getOrdering()));
1774 Vals.push_back(GetEncodedSynchScope(
1775 cast<AtomicRMWInst>(I).getSynchScope()));
1777 case Instruction::Fence:
1778 Code = bitc::FUNC_CODE_INST_FENCE;
1779 Vals.push_back(GetEncodedOrdering(cast<FenceInst>(I).getOrdering()));
1780 Vals.push_back(GetEncodedSynchScope(cast<FenceInst>(I).getSynchScope()));
1782 case Instruction::Call: {
1783 const CallInst &CI = cast<CallInst>(I);
1784 PointerType *PTy = cast<PointerType>(CI.getCalledValue()->getType());
1785 FunctionType *FTy = cast<FunctionType>(PTy->getElementType());
1787 Code = bitc::FUNC_CODE_INST_CALL;
1789 Vals.push_back(VE.getAttributeID(CI.getAttributes()));
1790 Vals.push_back((CI.getCallingConv() << 1) | unsigned(CI.isTailCall()) |
1791 unsigned(CI.isMustTailCall()) << 14);
1792 PushValueAndType(CI.getCalledValue(), InstID, Vals, VE); // Callee
1794 // Emit value #'s for the fixed parameters.
1795 for (unsigned i = 0, e = FTy->getNumParams(); i != e; ++i) {
1796 // Check for labels (can happen with asm labels).
1797 if (FTy->getParamType(i)->isLabelTy())
1798 Vals.push_back(VE.getValueID(CI.getArgOperand(i)));
1800 pushValue(CI.getArgOperand(i), InstID, Vals, VE); // fixed param.
1803 // Emit type/value pairs for varargs params.
1804 if (FTy->isVarArg()) {
1805 for (unsigned i = FTy->getNumParams(), e = CI.getNumArgOperands();
1807 PushValueAndType(CI.getArgOperand(i), InstID, Vals, VE); // varargs
1811 case Instruction::VAArg:
1812 Code = bitc::FUNC_CODE_INST_VAARG;
1813 Vals.push_back(VE.getTypeID(I.getOperand(0)->getType())); // valistty
1814 pushValue(I.getOperand(0), InstID, Vals, VE); // valist.
1815 Vals.push_back(VE.getTypeID(I.getType())); // restype.
1819 Stream.EmitRecord(Code, Vals, AbbrevToUse);
1823 // Emit names for globals/functions etc.
1824 static void WriteValueSymbolTable(const ValueSymbolTable &VST,
1825 const ValueEnumerator &VE,
1826 BitstreamWriter &Stream) {
1827 if (VST.empty()) return;
1828 Stream.EnterSubblock(bitc::VALUE_SYMTAB_BLOCK_ID, 4);
1830 // FIXME: Set up the abbrev, we know how many values there are!
1831 // FIXME: We know if the type names can use 7-bit ascii.
1832 SmallVector<unsigned, 64> NameVals;
1834 for (ValueSymbolTable::const_iterator SI = VST.begin(), SE = VST.end();
1837 const ValueName &Name = *SI;
1839 // Figure out the encoding to use for the name.
1841 bool isChar6 = true;
1842 for (const char *C = Name.getKeyData(), *E = C+Name.getKeyLength();
1845 isChar6 = BitCodeAbbrevOp::isChar6(*C);
1846 if ((unsigned char)*C & 128) {
1848 break; // don't bother scanning the rest.
1852 unsigned AbbrevToUse = VST_ENTRY_8_ABBREV;
1854 // VST_ENTRY: [valueid, namechar x N]
1855 // VST_BBENTRY: [bbid, namechar x N]
1857 if (isa<BasicBlock>(SI->getValue())) {
1858 Code = bitc::VST_CODE_BBENTRY;
1860 AbbrevToUse = VST_BBENTRY_6_ABBREV;
1862 Code = bitc::VST_CODE_ENTRY;
1864 AbbrevToUse = VST_ENTRY_6_ABBREV;
1866 AbbrevToUse = VST_ENTRY_7_ABBREV;
1869 NameVals.push_back(VE.getValueID(SI->getValue()));
1870 for (const char *P = Name.getKeyData(),
1871 *E = Name.getKeyData()+Name.getKeyLength(); P != E; ++P)
1872 NameVals.push_back((unsigned char)*P);
1874 // Emit the finished record.
1875 Stream.EmitRecord(Code, NameVals, AbbrevToUse);
1881 static void WriteUseList(ValueEnumerator &VE, UseListOrder &&Order,
1882 BitstreamWriter &Stream) {
1883 assert(Order.Shuffle.size() >= 2 && "Shuffle too small");
1885 if (isa<BasicBlock>(Order.V))
1886 Code = bitc::USELIST_CODE_BB;
1888 Code = bitc::USELIST_CODE_DEFAULT;
1890 SmallVector<uint64_t, 64> Record;
1891 for (unsigned I : Order.Shuffle)
1892 Record.push_back(I);
1893 Record.push_back(VE.getValueID(Order.V));
1894 Stream.EmitRecord(Code, Record);
1897 static void WriteUseListBlock(const Function *F, ValueEnumerator &VE,
1898 BitstreamWriter &Stream) {
1899 auto hasMore = [&]() {
1900 return !VE.UseListOrders.empty() && VE.UseListOrders.back().F == F;
1906 Stream.EnterSubblock(bitc::USELIST_BLOCK_ID, 3);
1908 WriteUseList(VE, std::move(VE.UseListOrders.back()), Stream);
1909 VE.UseListOrders.pop_back();
1914 /// WriteFunction - Emit a function body to the module stream.
1915 static void WriteFunction(const Function &F, ValueEnumerator &VE,
1916 BitstreamWriter &Stream) {
1917 Stream.EnterSubblock(bitc::FUNCTION_BLOCK_ID, 4);
1918 VE.incorporateFunction(F);
1920 SmallVector<unsigned, 64> Vals;
1922 // Emit the number of basic blocks, so the reader can create them ahead of
1924 Vals.push_back(VE.getBasicBlocks().size());
1925 Stream.EmitRecord(bitc::FUNC_CODE_DECLAREBLOCKS, Vals);
1928 // If there are function-local constants, emit them now.
1929 unsigned CstStart, CstEnd;
1930 VE.getFunctionConstantRange(CstStart, CstEnd);
1931 WriteConstants(CstStart, CstEnd, VE, Stream, false);
1933 // If there is function-local metadata, emit it now.
1934 WriteFunctionLocalMetadata(F, VE, Stream);
1936 // Keep a running idea of what the instruction ID is.
1937 unsigned InstID = CstEnd;
1939 bool NeedsMetadataAttachment = false;
1943 // Finally, emit all the instructions, in order.
1944 for (Function::const_iterator BB = F.begin(), E = F.end(); BB != E; ++BB)
1945 for (BasicBlock::const_iterator I = BB->begin(), E = BB->end();
1947 WriteInstruction(*I, InstID, VE, Stream, Vals);
1949 if (!I->getType()->isVoidTy())
1952 // If the instruction has metadata, write a metadata attachment later.
1953 NeedsMetadataAttachment |= I->hasMetadataOtherThanDebugLoc();
1955 // If the instruction has a debug location, emit it.
1956 DebugLoc DL = I->getDebugLoc();
1957 if (DL.isUnknown()) {
1959 } else if (DL == LastDL) {
1960 // Just repeat the same debug loc as last time.
1961 Stream.EmitRecord(bitc::FUNC_CODE_DEBUG_LOC_AGAIN, Vals);
1964 DL.getScopeAndInlinedAt(Scope, IA, I->getContext());
1965 assert(Scope && "Expected valid scope");
1967 Vals.push_back(DL.getLine());
1968 Vals.push_back(DL.getCol());
1969 Vals.push_back(VE.getMetadataOrNullID(Scope));
1970 Vals.push_back(VE.getMetadataOrNullID(IA));
1971 Stream.EmitRecord(bitc::FUNC_CODE_DEBUG_LOC, Vals);
1978 // Emit names for all the instructions etc.
1979 WriteValueSymbolTable(F.getValueSymbolTable(), VE, Stream);
1981 if (NeedsMetadataAttachment)
1982 WriteMetadataAttachment(F, VE, Stream);
1983 if (shouldPreserveBitcodeUseListOrder())
1984 WriteUseListBlock(&F, VE, Stream);
1989 // Emit blockinfo, which defines the standard abbreviations etc.
1990 static void WriteBlockInfo(const ValueEnumerator &VE, BitstreamWriter &Stream) {
1991 // We only want to emit block info records for blocks that have multiple
1992 // instances: CONSTANTS_BLOCK, FUNCTION_BLOCK and VALUE_SYMTAB_BLOCK.
1993 // Other blocks can define their abbrevs inline.
1994 Stream.EnterBlockInfoBlock(2);
1996 { // 8-bit fixed-width VST_ENTRY/VST_BBENTRY strings.
1997 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
1998 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 3));
1999 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8));
2000 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
2001 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 8));
2002 if (Stream.EmitBlockInfoAbbrev(bitc::VALUE_SYMTAB_BLOCK_ID,
2003 Abbv) != VST_ENTRY_8_ABBREV)
2004 llvm_unreachable("Unexpected abbrev ordering!");
2007 { // 7-bit fixed width VST_ENTRY strings.
2008 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
2009 Abbv->Add(BitCodeAbbrevOp(bitc::VST_CODE_ENTRY));
2010 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8));
2011 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
2012 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 7));
2013 if (Stream.EmitBlockInfoAbbrev(bitc::VALUE_SYMTAB_BLOCK_ID,
2014 Abbv) != VST_ENTRY_7_ABBREV)
2015 llvm_unreachable("Unexpected abbrev ordering!");
2017 { // 6-bit char6 VST_ENTRY strings.
2018 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
2019 Abbv->Add(BitCodeAbbrevOp(bitc::VST_CODE_ENTRY));
2020 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8));
2021 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
2022 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Char6));
2023 if (Stream.EmitBlockInfoAbbrev(bitc::VALUE_SYMTAB_BLOCK_ID,
2024 Abbv) != VST_ENTRY_6_ABBREV)
2025 llvm_unreachable("Unexpected abbrev ordering!");
2027 { // 6-bit char6 VST_BBENTRY strings.
2028 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
2029 Abbv->Add(BitCodeAbbrevOp(bitc::VST_CODE_BBENTRY));
2030 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8));
2031 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
2032 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Char6));
2033 if (Stream.EmitBlockInfoAbbrev(bitc::VALUE_SYMTAB_BLOCK_ID,
2034 Abbv) != VST_BBENTRY_6_ABBREV)
2035 llvm_unreachable("Unexpected abbrev ordering!");
2040 { // SETTYPE abbrev for CONSTANTS_BLOCK.
2041 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
2042 Abbv->Add(BitCodeAbbrevOp(bitc::CST_CODE_SETTYPE));
2043 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed,
2044 Log2_32_Ceil(VE.getTypes().size()+1)));
2045 if (Stream.EmitBlockInfoAbbrev(bitc::CONSTANTS_BLOCK_ID,
2046 Abbv) != CONSTANTS_SETTYPE_ABBREV)
2047 llvm_unreachable("Unexpected abbrev ordering!");
2050 { // INTEGER abbrev for CONSTANTS_BLOCK.
2051 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
2052 Abbv->Add(BitCodeAbbrevOp(bitc::CST_CODE_INTEGER));
2053 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8));
2054 if (Stream.EmitBlockInfoAbbrev(bitc::CONSTANTS_BLOCK_ID,
2055 Abbv) != CONSTANTS_INTEGER_ABBREV)
2056 llvm_unreachable("Unexpected abbrev ordering!");
2059 { // CE_CAST abbrev for CONSTANTS_BLOCK.
2060 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
2061 Abbv->Add(BitCodeAbbrevOp(bitc::CST_CODE_CE_CAST));
2062 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 4)); // cast opc
2063 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, // typeid
2064 Log2_32_Ceil(VE.getTypes().size()+1)));
2065 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8)); // value id
2067 if (Stream.EmitBlockInfoAbbrev(bitc::CONSTANTS_BLOCK_ID,
2068 Abbv) != CONSTANTS_CE_CAST_Abbrev)
2069 llvm_unreachable("Unexpected abbrev ordering!");
2071 { // NULL abbrev for CONSTANTS_BLOCK.
2072 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
2073 Abbv->Add(BitCodeAbbrevOp(bitc::CST_CODE_NULL));
2074 if (Stream.EmitBlockInfoAbbrev(bitc::CONSTANTS_BLOCK_ID,
2075 Abbv) != CONSTANTS_NULL_Abbrev)
2076 llvm_unreachable("Unexpected abbrev ordering!");
2079 // FIXME: This should only use space for first class types!
2081 { // INST_LOAD abbrev for FUNCTION_BLOCK.
2082 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
2083 Abbv->Add(BitCodeAbbrevOp(bitc::FUNC_CODE_INST_LOAD));
2084 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Ptr
2085 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 4)); // Align
2086 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // volatile
2087 if (Stream.EmitBlockInfoAbbrev(bitc::FUNCTION_BLOCK_ID,
2088 Abbv) != FUNCTION_INST_LOAD_ABBREV)
2089 llvm_unreachable("Unexpected abbrev ordering!");
2091 { // INST_BINOP abbrev for FUNCTION_BLOCK.
2092 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
2093 Abbv->Add(BitCodeAbbrevOp(bitc::FUNC_CODE_INST_BINOP));
2094 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // LHS
2095 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // RHS
2096 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 4)); // opc
2097 if (Stream.EmitBlockInfoAbbrev(bitc::FUNCTION_BLOCK_ID,
2098 Abbv) != FUNCTION_INST_BINOP_ABBREV)
2099 llvm_unreachable("Unexpected abbrev ordering!");
2101 { // INST_BINOP_FLAGS abbrev for FUNCTION_BLOCK.
2102 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
2103 Abbv->Add(BitCodeAbbrevOp(bitc::FUNC_CODE_INST_BINOP));
2104 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // LHS
2105 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // RHS
2106 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 4)); // opc
2107 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 7)); // flags
2108 if (Stream.EmitBlockInfoAbbrev(bitc::FUNCTION_BLOCK_ID,
2109 Abbv) != FUNCTION_INST_BINOP_FLAGS_ABBREV)
2110 llvm_unreachable("Unexpected abbrev ordering!");
2112 { // INST_CAST abbrev for FUNCTION_BLOCK.
2113 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
2114 Abbv->Add(BitCodeAbbrevOp(bitc::FUNC_CODE_INST_CAST));
2115 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // OpVal
2116 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, // dest ty
2117 Log2_32_Ceil(VE.getTypes().size()+1)));
2118 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 4)); // opc
2119 if (Stream.EmitBlockInfoAbbrev(bitc::FUNCTION_BLOCK_ID,
2120 Abbv) != FUNCTION_INST_CAST_ABBREV)
2121 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 if (Stream.EmitBlockInfoAbbrev(bitc::FUNCTION_BLOCK_ID,
2128 Abbv) != FUNCTION_INST_RET_VOID_ABBREV)
2129 llvm_unreachable("Unexpected abbrev ordering!");
2131 { // INST_RET abbrev for FUNCTION_BLOCK.
2132 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
2133 Abbv->Add(BitCodeAbbrevOp(bitc::FUNC_CODE_INST_RET));
2134 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // ValID
2135 if (Stream.EmitBlockInfoAbbrev(bitc::FUNCTION_BLOCK_ID,
2136 Abbv) != FUNCTION_INST_RET_VAL_ABBREV)
2137 llvm_unreachable("Unexpected abbrev ordering!");
2139 { // INST_UNREACHABLE abbrev for FUNCTION_BLOCK.
2140 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
2141 Abbv->Add(BitCodeAbbrevOp(bitc::FUNC_CODE_INST_UNREACHABLE));
2142 if (Stream.EmitBlockInfoAbbrev(bitc::FUNCTION_BLOCK_ID,
2143 Abbv) != FUNCTION_INST_UNREACHABLE_ABBREV)
2144 llvm_unreachable("Unexpected abbrev ordering!");
2150 /// WriteModule - Emit the specified module to the bitstream.
2151 static void WriteModule(const Module *M, BitstreamWriter &Stream) {
2152 Stream.EnterSubblock(bitc::MODULE_BLOCK_ID, 3);
2154 SmallVector<unsigned, 1> Vals;
2155 unsigned CurVersion = 1;
2156 Vals.push_back(CurVersion);
2157 Stream.EmitRecord(bitc::MODULE_CODE_VERSION, Vals);
2159 // Analyze the module, enumerating globals, functions, etc.
2160 ValueEnumerator VE(*M);
2162 // Emit blockinfo, which defines the standard abbreviations etc.
2163 WriteBlockInfo(VE, Stream);
2165 // Emit information about attribute groups.
2166 WriteAttributeGroupTable(VE, Stream);
2168 // Emit information about parameter attributes.
2169 WriteAttributeTable(VE, Stream);
2171 // Emit information describing all of the types in the module.
2172 WriteTypeTable(VE, Stream);
2174 writeComdats(VE, Stream);
2176 // Emit top-level description of module, including target triple, inline asm,
2177 // descriptors for global variables, and function prototype info.
2178 WriteModuleInfo(M, VE, Stream);
2181 WriteModuleConstants(VE, Stream);
2184 WriteModuleMetadata(M, VE, Stream);
2187 WriteModuleMetadataStore(M, Stream);
2189 // Emit names for globals/functions etc.
2190 WriteValueSymbolTable(M->getValueSymbolTable(), VE, Stream);
2192 // Emit module-level use-lists.
2193 if (shouldPreserveBitcodeUseListOrder())
2194 WriteUseListBlock(nullptr, VE, Stream);
2196 // Emit function bodies.
2197 for (Module::const_iterator F = M->begin(), E = M->end(); F != E; ++F)
2198 if (!F->isDeclaration())
2199 WriteFunction(*F, VE, Stream);
2204 /// EmitDarwinBCHeader - If generating a bc file on darwin, we have to emit a
2205 /// header and trailer to make it compatible with the system archiver. To do
2206 /// this we emit the following header, and then emit a trailer that pads the
2207 /// file out to be a multiple of 16 bytes.
2209 /// struct bc_header {
2210 /// uint32_t Magic; // 0x0B17C0DE
2211 /// uint32_t Version; // Version, currently always 0.
2212 /// uint32_t BitcodeOffset; // Offset to traditional bitcode file.
2213 /// uint32_t BitcodeSize; // Size of traditional bitcode file.
2214 /// uint32_t CPUType; // CPU specifier.
2215 /// ... potentially more later ...
2218 DarwinBCSizeFieldOffset = 3*4, // Offset to bitcode_size.
2219 DarwinBCHeaderSize = 5*4
2222 static void WriteInt32ToBuffer(uint32_t Value, SmallVectorImpl<char> &Buffer,
2223 uint32_t &Position) {
2224 Buffer[Position + 0] = (unsigned char) (Value >> 0);
2225 Buffer[Position + 1] = (unsigned char) (Value >> 8);
2226 Buffer[Position + 2] = (unsigned char) (Value >> 16);
2227 Buffer[Position + 3] = (unsigned char) (Value >> 24);
2231 static void EmitDarwinBCHeaderAndTrailer(SmallVectorImpl<char> &Buffer,
2233 unsigned CPUType = ~0U;
2235 // Match x86_64-*, i[3-9]86-*, powerpc-*, powerpc64-*, arm-*, thumb-*,
2236 // armv[0-9]-*, thumbv[0-9]-*, armv5te-*, or armv6t2-*. The CPUType is a magic
2237 // number from /usr/include/mach/machine.h. It is ok to reproduce the
2238 // specific constants here because they are implicitly part of the Darwin ABI.
2240 DARWIN_CPU_ARCH_ABI64 = 0x01000000,
2241 DARWIN_CPU_TYPE_X86 = 7,
2242 DARWIN_CPU_TYPE_ARM = 12,
2243 DARWIN_CPU_TYPE_POWERPC = 18
2246 Triple::ArchType Arch = TT.getArch();
2247 if (Arch == Triple::x86_64)
2248 CPUType = DARWIN_CPU_TYPE_X86 | DARWIN_CPU_ARCH_ABI64;
2249 else if (Arch == Triple::x86)
2250 CPUType = DARWIN_CPU_TYPE_X86;
2251 else if (Arch == Triple::ppc)
2252 CPUType = DARWIN_CPU_TYPE_POWERPC;
2253 else if (Arch == Triple::ppc64)
2254 CPUType = DARWIN_CPU_TYPE_POWERPC | DARWIN_CPU_ARCH_ABI64;
2255 else if (Arch == Triple::arm || Arch == Triple::thumb)
2256 CPUType = DARWIN_CPU_TYPE_ARM;
2258 // Traditional Bitcode starts after header.
2259 assert(Buffer.size() >= DarwinBCHeaderSize &&
2260 "Expected header size to be reserved");
2261 unsigned BCOffset = DarwinBCHeaderSize;
2262 unsigned BCSize = Buffer.size()-DarwinBCHeaderSize;
2264 // Write the magic and version.
2265 unsigned Position = 0;
2266 WriteInt32ToBuffer(0x0B17C0DE , Buffer, Position);
2267 WriteInt32ToBuffer(0 , Buffer, Position); // Version.
2268 WriteInt32ToBuffer(BCOffset , Buffer, Position);
2269 WriteInt32ToBuffer(BCSize , Buffer, Position);
2270 WriteInt32ToBuffer(CPUType , Buffer, Position);
2272 // If the file is not a multiple of 16 bytes, insert dummy padding.
2273 while (Buffer.size() & 15)
2274 Buffer.push_back(0);
2277 /// WriteBitcodeToFile - Write the specified module to the specified output
2279 void llvm::WriteBitcodeToFile(const Module *M, raw_ostream &Out) {
2280 SmallVector<char, 0> Buffer;
2281 Buffer.reserve(256*1024);
2283 // If this is darwin or another generic macho target, reserve space for the
2285 Triple TT(M->getTargetTriple());
2286 if (TT.isOSDarwin())
2287 Buffer.insert(Buffer.begin(), DarwinBCHeaderSize, 0);
2289 // Emit the module into the buffer.
2291 BitstreamWriter Stream(Buffer);
2293 // Emit the file header.
2294 Stream.Emit((unsigned)'B', 8);
2295 Stream.Emit((unsigned)'C', 8);
2296 Stream.Emit(0x0, 4);
2297 Stream.Emit(0xC, 4);
2298 Stream.Emit(0xE, 4);
2299 Stream.Emit(0xD, 4);
2302 WriteModule(M, Stream);
2305 if (TT.isOSDarwin())
2306 EmitDarwinBCHeaderAndTrailer(Buffer, TT);
2308 // Write the generated bitstream to "Out".
2309 Out.write((char*)&Buffer.front(), Buffer.size());