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 "ValueEnumerator.h"
15 #include "llvm/ADT/StringExtras.h"
16 #include "llvm/ADT/Triple.h"
17 #include "llvm/Bitcode/BitstreamWriter.h"
18 #include "llvm/Bitcode/LLVMBitCodes.h"
19 #include "llvm/Bitcode/ReaderWriter.h"
20 #include "llvm/IR/CallSite.h"
21 #include "llvm/IR/Constants.h"
22 #include "llvm/IR/DebugInfoMetadata.h"
23 #include "llvm/IR/DerivedTypes.h"
24 #include "llvm/IR/InlineAsm.h"
25 #include "llvm/IR/Instructions.h"
26 #include "llvm/IR/LLVMContext.h"
27 #include "llvm/IR/Module.h"
28 #include "llvm/IR/Operator.h"
29 #include "llvm/IR/UseListOrder.h"
30 #include "llvm/IR/ValueSymbolTable.h"
31 #include "llvm/Support/ErrorHandling.h"
32 #include "llvm/Support/MathExtras.h"
33 #include "llvm/Support/Program.h"
34 #include "llvm/Support/SHA1.h"
35 #include "llvm/Support/raw_ostream.h"
41 /// These are manifest constants used by the bitcode writer. They do not need to
42 /// be kept in sync with the reader, but need to be consistent within this file.
44 // VALUE_SYMTAB_BLOCK abbrev id's.
45 VST_ENTRY_8_ABBREV = bitc::FIRST_APPLICATION_ABBREV,
50 // CONSTANTS_BLOCK abbrev id's.
51 CONSTANTS_SETTYPE_ABBREV = bitc::FIRST_APPLICATION_ABBREV,
52 CONSTANTS_INTEGER_ABBREV,
53 CONSTANTS_CE_CAST_Abbrev,
54 CONSTANTS_NULL_Abbrev,
56 // FUNCTION_BLOCK abbrev id's.
57 FUNCTION_INST_LOAD_ABBREV = bitc::FIRST_APPLICATION_ABBREV,
58 FUNCTION_INST_BINOP_ABBREV,
59 FUNCTION_INST_BINOP_FLAGS_ABBREV,
60 FUNCTION_INST_CAST_ABBREV,
61 FUNCTION_INST_RET_VOID_ABBREV,
62 FUNCTION_INST_RET_VAL_ABBREV,
63 FUNCTION_INST_UNREACHABLE_ABBREV,
64 FUNCTION_INST_GEP_ABBREV,
67 /// Abstract class to manage the bitcode writing, subclassed for each bitcode
68 /// file type. Owns the BitstreamWriter, and includes the main entry point for
72 /// Pointer to the buffer allocated by caller for bitcode writing.
73 const SmallVectorImpl<char> &Buffer;
75 /// The stream created and owned by the BitodeWriter.
76 BitstreamWriter Stream;
78 /// Saves the offset of the VSTOffset record that must eventually be
79 /// backpatched with the offset of the actual VST.
80 uint64_t VSTOffsetPlaceholder = 0;
83 /// Constructs a BitcodeWriter object, and initializes a BitstreamRecord,
84 /// writing to the provided \p Buffer.
85 BitcodeWriter(SmallVectorImpl<char> &Buffer)
86 : Buffer(Buffer), Stream(Buffer) {}
88 virtual ~BitcodeWriter() = default;
90 /// Main entry point to write the bitcode file, which writes the bitcode
91 /// header and will then invoke the virtual writeBlocks() method.
95 /// Derived classes must implement this to write the corresponding blocks for
96 /// that bitcode file type.
97 virtual void writeBlocks() = 0;
100 bool hasVSTOffsetPlaceholder() { return VSTOffsetPlaceholder != 0; }
101 void writeValueSymbolTableForwardDecl();
102 void writeBitcodeHeader();
105 /// Class to manage the bitcode writing for a module.
106 class ModuleBitcodeWriter : public BitcodeWriter {
107 /// The Module to write to bitcode.
110 /// Enumerates ids for all values in the module.
113 /// Optional per-module index to write for ThinLTO.
114 const ModuleSummaryIndex *Index;
116 /// True if a module hash record should be written.
119 /// The start bit of the module block, for use in generating a module hash
120 uint64_t BitcodeStartBit = 0;
122 /// Map that holds the correspondence between GUIDs in the summary index,
123 /// that came from indirect call profiles, and a value id generated by this
124 /// class to use in the VST and summary block records.
125 std::map<GlobalValue::GUID, unsigned> GUIDToValueIdMap;
127 /// Tracks the last value id recorded in the GUIDToValueMap.
128 unsigned GlobalValueId;
131 /// Constructs a ModuleBitcodeWriter object for the given Module,
132 /// writing to the provided \p Buffer.
133 ModuleBitcodeWriter(const Module *M, SmallVectorImpl<char> &Buffer,
134 bool ShouldPreserveUseListOrder,
135 const ModuleSummaryIndex *Index, bool GenerateHash)
136 : BitcodeWriter(Buffer), M(*M), VE(*M, ShouldPreserveUseListOrder),
137 Index(Index), GenerateHash(GenerateHash) {
138 // Save the start bit of the actual bitcode, in case there is space
139 // saved at the start for the darwin header above. The reader stream
140 // will start at the bitcode, and we need the offset of the VST
142 BitcodeStartBit = Stream.GetCurrentBitNo();
144 // Assign ValueIds to any callee values in the index that came from
145 // indirect call profiles and were recorded as a GUID not a Value*
146 // (which would have been assigned an ID by the ValueEnumerator).
147 // The starting ValueId is just after the number of values in the
148 // ValueEnumerator, so that they can be emitted in the VST.
149 GlobalValueId = VE.getValues().size();
151 for (const auto &GUIDSummaryLists : *Index)
152 // Examine all summaries for this GUID.
153 for (auto &Summary : GUIDSummaryLists.second)
154 if (auto FS = dyn_cast<FunctionSummary>(Summary.get()))
155 // For each call in the function summary, see if the call
156 // is to a GUID (which means it is for an indirect call,
157 // otherwise we would have a Value for it). If so, synthesize
159 for (auto &CallEdge : FS->calls())
160 if (CallEdge.first.isGUID())
161 assignValueId(CallEdge.first.getGUID());
165 /// Main entry point for writing a module to bitcode, invoked by
166 /// BitcodeWriter::write() after it writes the header.
167 void writeBlocks() override;
169 /// Create the "IDENTIFICATION_BLOCK_ID" containing a single string with the
170 /// current llvm version, and a record for the epoch number.
171 void writeIdentificationBlock();
173 /// Emit the current module to the bitstream.
176 uint64_t bitcodeStartBit() { return BitcodeStartBit; }
178 void writeStringRecord(unsigned Code, StringRef Str, unsigned AbbrevToUse);
179 void writeAttributeGroupTable();
180 void writeAttributeTable();
181 void writeTypeTable();
183 void writeModuleInfo();
184 void writeValueAsMetadata(const ValueAsMetadata *MD,
185 SmallVectorImpl<uint64_t> &Record);
186 void writeMDTuple(const MDTuple *N, SmallVectorImpl<uint64_t> &Record,
188 unsigned createDILocationAbbrev();
189 void writeDILocation(const DILocation *N, SmallVectorImpl<uint64_t> &Record,
191 unsigned createGenericDINodeAbbrev();
192 void writeGenericDINode(const GenericDINode *N,
193 SmallVectorImpl<uint64_t> &Record, unsigned &Abbrev);
194 void writeDISubrange(const DISubrange *N, SmallVectorImpl<uint64_t> &Record,
196 void writeDIEnumerator(const DIEnumerator *N,
197 SmallVectorImpl<uint64_t> &Record, unsigned Abbrev);
198 void writeDIBasicType(const DIBasicType *N, SmallVectorImpl<uint64_t> &Record,
200 void writeDIDerivedType(const DIDerivedType *N,
201 SmallVectorImpl<uint64_t> &Record, unsigned Abbrev);
202 void writeDICompositeType(const DICompositeType *N,
203 SmallVectorImpl<uint64_t> &Record, unsigned Abbrev);
204 void writeDISubroutineType(const DISubroutineType *N,
205 SmallVectorImpl<uint64_t> &Record,
207 void writeDIFile(const DIFile *N, SmallVectorImpl<uint64_t> &Record,
209 void writeDICompileUnit(const DICompileUnit *N,
210 SmallVectorImpl<uint64_t> &Record, unsigned Abbrev);
211 void writeDISubprogram(const DISubprogram *N,
212 SmallVectorImpl<uint64_t> &Record, unsigned Abbrev);
213 void writeDILexicalBlock(const DILexicalBlock *N,
214 SmallVectorImpl<uint64_t> &Record, unsigned Abbrev);
215 void writeDILexicalBlockFile(const DILexicalBlockFile *N,
216 SmallVectorImpl<uint64_t> &Record,
218 void writeDINamespace(const DINamespace *N, SmallVectorImpl<uint64_t> &Record,
220 void writeDIMacro(const DIMacro *N, SmallVectorImpl<uint64_t> &Record,
222 void writeDIMacroFile(const DIMacroFile *N, SmallVectorImpl<uint64_t> &Record,
224 void writeDIModule(const DIModule *N, SmallVectorImpl<uint64_t> &Record,
226 void writeDITemplateTypeParameter(const DITemplateTypeParameter *N,
227 SmallVectorImpl<uint64_t> &Record,
229 void writeDITemplateValueParameter(const DITemplateValueParameter *N,
230 SmallVectorImpl<uint64_t> &Record,
232 void writeDIGlobalVariable(const DIGlobalVariable *N,
233 SmallVectorImpl<uint64_t> &Record,
235 void writeDILocalVariable(const DILocalVariable *N,
236 SmallVectorImpl<uint64_t> &Record, unsigned Abbrev);
237 void writeDIExpression(const DIExpression *N,
238 SmallVectorImpl<uint64_t> &Record, unsigned Abbrev);
239 void writeDIObjCProperty(const DIObjCProperty *N,
240 SmallVectorImpl<uint64_t> &Record, unsigned Abbrev);
241 void writeDIImportedEntity(const DIImportedEntity *N,
242 SmallVectorImpl<uint64_t> &Record,
244 unsigned createNamedMetadataAbbrev();
245 void writeNamedMetadata(SmallVectorImpl<uint64_t> &Record);
246 unsigned createMetadataStringsAbbrev();
247 void writeMetadataStrings(ArrayRef<const Metadata *> Strings,
248 SmallVectorImpl<uint64_t> &Record);
249 void writeMetadataRecords(ArrayRef<const Metadata *> MDs,
250 SmallVectorImpl<uint64_t> &Record);
251 void writeModuleMetadata();
252 void writeFunctionMetadata(const Function &F);
253 void writeFunctionMetadataAttachment(const Function &F);
254 void writeGlobalVariableMetadataAttachment(const GlobalVariable &GV);
255 void pushGlobalMetadataAttachment(SmallVectorImpl<uint64_t> &Record,
256 const GlobalObject &GO);
257 void writeModuleMetadataKinds();
258 void writeOperandBundleTags();
259 void writeConstants(unsigned FirstVal, unsigned LastVal, bool isGlobal);
260 void writeModuleConstants();
261 bool pushValueAndType(const Value *V, unsigned InstID,
262 SmallVectorImpl<unsigned> &Vals);
263 void writeOperandBundles(ImmutableCallSite CS, unsigned InstID);
264 void pushValue(const Value *V, unsigned InstID,
265 SmallVectorImpl<unsigned> &Vals);
266 void pushValueSigned(const Value *V, unsigned InstID,
267 SmallVectorImpl<uint64_t> &Vals);
268 void writeInstruction(const Instruction &I, unsigned InstID,
269 SmallVectorImpl<unsigned> &Vals);
270 void writeValueSymbolTable(
271 const ValueSymbolTable &VST, bool IsModuleLevel = false,
272 DenseMap<const Function *, uint64_t> *FunctionToBitcodeIndex = nullptr);
273 void writeUseList(UseListOrder &&Order);
274 void writeUseListBlock(const Function *F);
276 writeFunction(const Function &F,
277 DenseMap<const Function *, uint64_t> &FunctionToBitcodeIndex);
278 void writeBlockInfo();
279 void writePerModuleFunctionSummaryRecord(SmallVector<uint64_t, 64> &NameVals,
280 GlobalValueSummary *Summary,
282 unsigned FSCallsAbbrev,
283 unsigned FSCallsProfileAbbrev,
285 void writeModuleLevelReferences(const GlobalVariable &V,
286 SmallVector<uint64_t, 64> &NameVals,
287 unsigned FSModRefsAbbrev);
288 void writePerModuleGlobalValueSummary();
289 void writeModuleHash(size_t BlockStartPos);
291 void assignValueId(GlobalValue::GUID ValGUID) {
292 GUIDToValueIdMap[ValGUID] = ++GlobalValueId;
294 unsigned getValueId(GlobalValue::GUID ValGUID) {
295 const auto &VMI = GUIDToValueIdMap.find(ValGUID);
296 assert(VMI != GUIDToValueIdMap.end());
299 // Helper to get the valueId for the type of value recorded in VI.
300 unsigned getValueId(ValueInfo VI) {
302 return getValueId(VI.getGUID());
303 return VE.getValueID(VI.getValue());
305 std::map<GlobalValue::GUID, unsigned> &valueIds() { return GUIDToValueIdMap; }
308 /// Class to manage the bitcode writing for a combined index.
309 class IndexBitcodeWriter : public BitcodeWriter {
310 /// The combined index to write to bitcode.
311 const ModuleSummaryIndex &Index;
313 /// When writing a subset of the index for distributed backends, client
314 /// provides a map of modules to the corresponding GUIDs/summaries to write.
315 std::map<std::string, GVSummaryMapTy> *ModuleToSummariesForIndex;
317 /// Map that holds the correspondence between the GUID used in the combined
318 /// index and a value id generated by this class to use in references.
319 std::map<GlobalValue::GUID, unsigned> GUIDToValueIdMap;
321 /// Tracks the last value id recorded in the GUIDToValueMap.
322 unsigned GlobalValueId = 0;
325 /// Constructs a IndexBitcodeWriter object for the given combined index,
326 /// writing to the provided \p Buffer. When writing a subset of the index
327 /// for a distributed backend, provide a \p ModuleToSummariesForIndex map.
328 IndexBitcodeWriter(SmallVectorImpl<char> &Buffer,
329 const ModuleSummaryIndex &Index,
330 std::map<std::string, GVSummaryMapTy>
331 *ModuleToSummariesForIndex = nullptr)
332 : BitcodeWriter(Buffer), Index(Index),
333 ModuleToSummariesForIndex(ModuleToSummariesForIndex) {
334 // Assign unique value ids to all summaries to be written, for use
335 // in writing out the call graph edges. Save the mapping from GUID
336 // to the new global value id to use when writing those edges, which
337 // are currently saved in the index in terms of GUID.
338 for (const auto &I : *this)
339 GUIDToValueIdMap[I.first] = ++GlobalValueId;
342 /// The below iterator returns the GUID and associated summary.
343 typedef std::pair<GlobalValue::GUID, GlobalValueSummary *> GVInfo;
345 /// Iterator over the value GUID and summaries to be written to bitcode,
346 /// hides the details of whether they are being pulled from the entire
347 /// index or just those in a provided ModuleToSummariesForIndex map.
349 : public llvm::iterator_facade_base<iterator, std::forward_iterator_tag,
351 /// Enables access to parent class.
352 const IndexBitcodeWriter &Writer;
354 // Iterators used when writing only those summaries in a provided
355 // ModuleToSummariesForIndex map:
357 /// Points to the last element in outer ModuleToSummariesForIndex map.
358 std::map<std::string, GVSummaryMapTy>::iterator ModuleSummariesBack;
359 /// Iterator on outer ModuleToSummariesForIndex map.
360 std::map<std::string, GVSummaryMapTy>::iterator ModuleSummariesIter;
361 /// Iterator on an inner global variable summary map.
362 GVSummaryMapTy::iterator ModuleGVSummariesIter;
364 // Iterators used when writing all summaries in the index:
366 /// Points to the last element in the Index outer GlobalValueMap.
367 const_gvsummary_iterator IndexSummariesBack;
368 /// Iterator on outer GlobalValueMap.
369 const_gvsummary_iterator IndexSummariesIter;
370 /// Iterator on an inner GlobalValueSummaryList.
371 GlobalValueSummaryList::const_iterator IndexGVSummariesIter;
374 /// Construct iterator from parent \p Writer and indicate if we are
375 /// constructing the end iterator.
376 iterator(const IndexBitcodeWriter &Writer, bool IsAtEnd) : Writer(Writer) {
377 // Set up the appropriate set of iterators given whether we are writing
378 // the full index or just a subset.
379 // Can't setup the Back or inner iterators if the corresponding map
380 // is empty. This will be handled specially in operator== as well.
381 if (Writer.ModuleToSummariesForIndex &&
382 !Writer.ModuleToSummariesForIndex->empty()) {
383 for (ModuleSummariesBack = Writer.ModuleToSummariesForIndex->begin();
384 std::next(ModuleSummariesBack) !=
385 Writer.ModuleToSummariesForIndex->end();
386 ModuleSummariesBack++)
388 ModuleSummariesIter = !IsAtEnd
389 ? Writer.ModuleToSummariesForIndex->begin()
390 : ModuleSummariesBack;
391 ModuleGVSummariesIter = !IsAtEnd ? ModuleSummariesIter->second.begin()
392 : ModuleSummariesBack->second.end();
393 } else if (!Writer.ModuleToSummariesForIndex &&
394 Writer.Index.begin() != Writer.Index.end()) {
395 for (IndexSummariesBack = Writer.Index.begin();
396 std::next(IndexSummariesBack) != Writer.Index.end();
397 IndexSummariesBack++)
400 !IsAtEnd ? Writer.Index.begin() : IndexSummariesBack;
401 IndexGVSummariesIter = !IsAtEnd ? IndexSummariesIter->second.begin()
402 : IndexSummariesBack->second.end();
406 /// Increment the appropriate set of iterators.
407 iterator &operator++() {
408 // First the inner iterator is incremented, then if it is at the end
409 // and there are more outer iterations to go, the inner is reset to
410 // the start of the next inner list.
411 if (Writer.ModuleToSummariesForIndex) {
412 ++ModuleGVSummariesIter;
413 if (ModuleGVSummariesIter == ModuleSummariesIter->second.end() &&
414 ModuleSummariesIter != ModuleSummariesBack) {
415 ++ModuleSummariesIter;
416 ModuleGVSummariesIter = ModuleSummariesIter->second.begin();
419 ++IndexGVSummariesIter;
420 if (IndexGVSummariesIter == IndexSummariesIter->second.end() &&
421 IndexSummariesIter != IndexSummariesBack) {
422 ++IndexSummariesIter;
423 IndexGVSummariesIter = IndexSummariesIter->second.begin();
429 /// Access the <GUID,GlobalValueSummary*> pair corresponding to the current
430 /// outer and inner iterator positions.
432 if (Writer.ModuleToSummariesForIndex)
433 return std::make_pair(ModuleGVSummariesIter->first,
434 ModuleGVSummariesIter->second);
435 return std::make_pair(IndexSummariesIter->first,
436 IndexGVSummariesIter->get());
439 /// Checks if the iterators are equal, with special handling for empty
441 bool operator==(const iterator &RHS) const {
442 if (Writer.ModuleToSummariesForIndex) {
443 // First ensure that both are writing the same subset.
444 if (Writer.ModuleToSummariesForIndex !=
445 RHS.Writer.ModuleToSummariesForIndex)
447 // Already determined above that maps are the same, so if one is
448 // empty, they both are.
449 if (Writer.ModuleToSummariesForIndex->empty())
451 // Ensure the ModuleGVSummariesIter are iterating over the same
452 // container before checking them below.
453 if (ModuleSummariesIter != RHS.ModuleSummariesIter)
455 return ModuleGVSummariesIter == RHS.ModuleGVSummariesIter;
457 // First ensure RHS also writing the full index, and that both are
458 // writing the same full index.
459 if (RHS.Writer.ModuleToSummariesForIndex ||
460 &Writer.Index != &RHS.Writer.Index)
462 // Already determined above that maps are the same, so if one is
463 // empty, they both are.
464 if (Writer.Index.begin() == Writer.Index.end())
466 // Ensure the IndexGVSummariesIter are iterating over the same
467 // container before checking them below.
468 if (IndexSummariesIter != RHS.IndexSummariesIter)
470 return IndexGVSummariesIter == RHS.IndexGVSummariesIter;
474 /// Obtain the start iterator over the summaries to be written.
475 iterator begin() { return iterator(*this, /*IsAtEnd=*/false); }
476 /// Obtain the end iterator over the summaries to be written.
477 iterator end() { return iterator(*this, /*IsAtEnd=*/true); }
480 /// Main entry point for writing a combined index to bitcode, invoked by
481 /// BitcodeWriter::write() after it writes the header.
482 void writeBlocks() override;
485 void writeModStrings();
486 void writeCombinedValueSymbolTable();
487 void writeCombinedGlobalValueSummary();
489 /// Indicates whether the provided \p ModulePath should be written into
490 /// the module string table, e.g. if full index written or if it is in
491 /// the provided subset.
492 bool doIncludeModule(StringRef ModulePath) {
493 return !ModuleToSummariesForIndex ||
494 ModuleToSummariesForIndex->count(ModulePath);
497 bool hasValueId(GlobalValue::GUID ValGUID) {
498 const auto &VMI = GUIDToValueIdMap.find(ValGUID);
499 return VMI != GUIDToValueIdMap.end();
501 unsigned getValueId(GlobalValue::GUID ValGUID) {
502 const auto &VMI = GUIDToValueIdMap.find(ValGUID);
503 // If this GUID doesn't have an entry, assign one.
504 if (VMI == GUIDToValueIdMap.end()) {
505 GUIDToValueIdMap[ValGUID] = ++GlobalValueId;
506 return GlobalValueId;
511 std::map<GlobalValue::GUID, unsigned> &valueIds() { return GUIDToValueIdMap; }
513 } // end anonymous namespace
515 static unsigned getEncodedCastOpcode(unsigned Opcode) {
517 default: llvm_unreachable("Unknown cast instruction!");
518 case Instruction::Trunc : return bitc::CAST_TRUNC;
519 case Instruction::ZExt : return bitc::CAST_ZEXT;
520 case Instruction::SExt : return bitc::CAST_SEXT;
521 case Instruction::FPToUI : return bitc::CAST_FPTOUI;
522 case Instruction::FPToSI : return bitc::CAST_FPTOSI;
523 case Instruction::UIToFP : return bitc::CAST_UITOFP;
524 case Instruction::SIToFP : return bitc::CAST_SITOFP;
525 case Instruction::FPTrunc : return bitc::CAST_FPTRUNC;
526 case Instruction::FPExt : return bitc::CAST_FPEXT;
527 case Instruction::PtrToInt: return bitc::CAST_PTRTOINT;
528 case Instruction::IntToPtr: return bitc::CAST_INTTOPTR;
529 case Instruction::BitCast : return bitc::CAST_BITCAST;
530 case Instruction::AddrSpaceCast: return bitc::CAST_ADDRSPACECAST;
534 static unsigned getEncodedBinaryOpcode(unsigned Opcode) {
536 default: llvm_unreachable("Unknown binary instruction!");
537 case Instruction::Add:
538 case Instruction::FAdd: return bitc::BINOP_ADD;
539 case Instruction::Sub:
540 case Instruction::FSub: return bitc::BINOP_SUB;
541 case Instruction::Mul:
542 case Instruction::FMul: return bitc::BINOP_MUL;
543 case Instruction::UDiv: return bitc::BINOP_UDIV;
544 case Instruction::FDiv:
545 case Instruction::SDiv: return bitc::BINOP_SDIV;
546 case Instruction::URem: return bitc::BINOP_UREM;
547 case Instruction::FRem:
548 case Instruction::SRem: return bitc::BINOP_SREM;
549 case Instruction::Shl: return bitc::BINOP_SHL;
550 case Instruction::LShr: return bitc::BINOP_LSHR;
551 case Instruction::AShr: return bitc::BINOP_ASHR;
552 case Instruction::And: return bitc::BINOP_AND;
553 case Instruction::Or: return bitc::BINOP_OR;
554 case Instruction::Xor: return bitc::BINOP_XOR;
558 static unsigned getEncodedRMWOperation(AtomicRMWInst::BinOp Op) {
560 default: llvm_unreachable("Unknown RMW operation!");
561 case AtomicRMWInst::Xchg: return bitc::RMW_XCHG;
562 case AtomicRMWInst::Add: return bitc::RMW_ADD;
563 case AtomicRMWInst::Sub: return bitc::RMW_SUB;
564 case AtomicRMWInst::And: return bitc::RMW_AND;
565 case AtomicRMWInst::Nand: return bitc::RMW_NAND;
566 case AtomicRMWInst::Or: return bitc::RMW_OR;
567 case AtomicRMWInst::Xor: return bitc::RMW_XOR;
568 case AtomicRMWInst::Max: return bitc::RMW_MAX;
569 case AtomicRMWInst::Min: return bitc::RMW_MIN;
570 case AtomicRMWInst::UMax: return bitc::RMW_UMAX;
571 case AtomicRMWInst::UMin: return bitc::RMW_UMIN;
575 static unsigned getEncodedOrdering(AtomicOrdering Ordering) {
577 case AtomicOrdering::NotAtomic: return bitc::ORDERING_NOTATOMIC;
578 case AtomicOrdering::Unordered: return bitc::ORDERING_UNORDERED;
579 case AtomicOrdering::Monotonic: return bitc::ORDERING_MONOTONIC;
580 case AtomicOrdering::Acquire: return bitc::ORDERING_ACQUIRE;
581 case AtomicOrdering::Release: return bitc::ORDERING_RELEASE;
582 case AtomicOrdering::AcquireRelease: return bitc::ORDERING_ACQREL;
583 case AtomicOrdering::SequentiallyConsistent: return bitc::ORDERING_SEQCST;
585 llvm_unreachable("Invalid ordering");
588 static unsigned getEncodedSynchScope(SynchronizationScope SynchScope) {
589 switch (SynchScope) {
590 case SingleThread: return bitc::SYNCHSCOPE_SINGLETHREAD;
591 case CrossThread: return bitc::SYNCHSCOPE_CROSSTHREAD;
593 llvm_unreachable("Invalid synch scope");
596 void ModuleBitcodeWriter::writeStringRecord(unsigned Code, StringRef Str,
597 unsigned AbbrevToUse) {
598 SmallVector<unsigned, 64> Vals;
600 // Code: [strchar x N]
601 for (unsigned i = 0, e = Str.size(); i != e; ++i) {
602 if (AbbrevToUse && !BitCodeAbbrevOp::isChar6(Str[i]))
604 Vals.push_back(Str[i]);
607 // Emit the finished record.
608 Stream.EmitRecord(Code, Vals, AbbrevToUse);
611 static uint64_t getAttrKindEncoding(Attribute::AttrKind Kind) {
613 case Attribute::Alignment:
614 return bitc::ATTR_KIND_ALIGNMENT;
615 case Attribute::AllocSize:
616 return bitc::ATTR_KIND_ALLOC_SIZE;
617 case Attribute::AlwaysInline:
618 return bitc::ATTR_KIND_ALWAYS_INLINE;
619 case Attribute::ArgMemOnly:
620 return bitc::ATTR_KIND_ARGMEMONLY;
621 case Attribute::Builtin:
622 return bitc::ATTR_KIND_BUILTIN;
623 case Attribute::ByVal:
624 return bitc::ATTR_KIND_BY_VAL;
625 case Attribute::Convergent:
626 return bitc::ATTR_KIND_CONVERGENT;
627 case Attribute::InAlloca:
628 return bitc::ATTR_KIND_IN_ALLOCA;
629 case Attribute::Cold:
630 return bitc::ATTR_KIND_COLD;
631 case Attribute::InaccessibleMemOnly:
632 return bitc::ATTR_KIND_INACCESSIBLEMEM_ONLY;
633 case Attribute::InaccessibleMemOrArgMemOnly:
634 return bitc::ATTR_KIND_INACCESSIBLEMEM_OR_ARGMEMONLY;
635 case Attribute::InlineHint:
636 return bitc::ATTR_KIND_INLINE_HINT;
637 case Attribute::InReg:
638 return bitc::ATTR_KIND_IN_REG;
639 case Attribute::JumpTable:
640 return bitc::ATTR_KIND_JUMP_TABLE;
641 case Attribute::MinSize:
642 return bitc::ATTR_KIND_MIN_SIZE;
643 case Attribute::Naked:
644 return bitc::ATTR_KIND_NAKED;
645 case Attribute::Nest:
646 return bitc::ATTR_KIND_NEST;
647 case Attribute::NoAlias:
648 return bitc::ATTR_KIND_NO_ALIAS;
649 case Attribute::NoBuiltin:
650 return bitc::ATTR_KIND_NO_BUILTIN;
651 case Attribute::NoCapture:
652 return bitc::ATTR_KIND_NO_CAPTURE;
653 case Attribute::NoDuplicate:
654 return bitc::ATTR_KIND_NO_DUPLICATE;
655 case Attribute::NoImplicitFloat:
656 return bitc::ATTR_KIND_NO_IMPLICIT_FLOAT;
657 case Attribute::NoInline:
658 return bitc::ATTR_KIND_NO_INLINE;
659 case Attribute::NoRecurse:
660 return bitc::ATTR_KIND_NO_RECURSE;
661 case Attribute::NonLazyBind:
662 return bitc::ATTR_KIND_NON_LAZY_BIND;
663 case Attribute::NonNull:
664 return bitc::ATTR_KIND_NON_NULL;
665 case Attribute::Dereferenceable:
666 return bitc::ATTR_KIND_DEREFERENCEABLE;
667 case Attribute::DereferenceableOrNull:
668 return bitc::ATTR_KIND_DEREFERENCEABLE_OR_NULL;
669 case Attribute::NoRedZone:
670 return bitc::ATTR_KIND_NO_RED_ZONE;
671 case Attribute::NoReturn:
672 return bitc::ATTR_KIND_NO_RETURN;
673 case Attribute::NoUnwind:
674 return bitc::ATTR_KIND_NO_UNWIND;
675 case Attribute::OptimizeForSize:
676 return bitc::ATTR_KIND_OPTIMIZE_FOR_SIZE;
677 case Attribute::OptimizeNone:
678 return bitc::ATTR_KIND_OPTIMIZE_NONE;
679 case Attribute::ReadNone:
680 return bitc::ATTR_KIND_READ_NONE;
681 case Attribute::ReadOnly:
682 return bitc::ATTR_KIND_READ_ONLY;
683 case Attribute::Returned:
684 return bitc::ATTR_KIND_RETURNED;
685 case Attribute::ReturnsTwice:
686 return bitc::ATTR_KIND_RETURNS_TWICE;
687 case Attribute::SExt:
688 return bitc::ATTR_KIND_S_EXT;
689 case Attribute::StackAlignment:
690 return bitc::ATTR_KIND_STACK_ALIGNMENT;
691 case Attribute::StackProtect:
692 return bitc::ATTR_KIND_STACK_PROTECT;
693 case Attribute::StackProtectReq:
694 return bitc::ATTR_KIND_STACK_PROTECT_REQ;
695 case Attribute::StackProtectStrong:
696 return bitc::ATTR_KIND_STACK_PROTECT_STRONG;
697 case Attribute::SafeStack:
698 return bitc::ATTR_KIND_SAFESTACK;
699 case Attribute::StructRet:
700 return bitc::ATTR_KIND_STRUCT_RET;
701 case Attribute::SanitizeAddress:
702 return bitc::ATTR_KIND_SANITIZE_ADDRESS;
703 case Attribute::SanitizeThread:
704 return bitc::ATTR_KIND_SANITIZE_THREAD;
705 case Attribute::SanitizeMemory:
706 return bitc::ATTR_KIND_SANITIZE_MEMORY;
707 case Attribute::SwiftError:
708 return bitc::ATTR_KIND_SWIFT_ERROR;
709 case Attribute::SwiftSelf:
710 return bitc::ATTR_KIND_SWIFT_SELF;
711 case Attribute::UWTable:
712 return bitc::ATTR_KIND_UW_TABLE;
713 case Attribute::WriteOnly:
714 return bitc::ATTR_KIND_WRITEONLY;
715 case Attribute::ZExt:
716 return bitc::ATTR_KIND_Z_EXT;
717 case Attribute::EndAttrKinds:
718 llvm_unreachable("Can not encode end-attribute kinds marker.");
719 case Attribute::None:
720 llvm_unreachable("Can not encode none-attribute.");
723 llvm_unreachable("Trying to encode unknown attribute");
726 void ModuleBitcodeWriter::writeAttributeGroupTable() {
727 const std::vector<AttributeSet> &AttrGrps = VE.getAttributeGroups();
728 if (AttrGrps.empty()) return;
730 Stream.EnterSubblock(bitc::PARAMATTR_GROUP_BLOCK_ID, 3);
732 SmallVector<uint64_t, 64> Record;
733 for (unsigned i = 0, e = AttrGrps.size(); i != e; ++i) {
734 AttributeSet AS = AttrGrps[i];
735 for (unsigned i = 0, e = AS.getNumSlots(); i != e; ++i) {
736 AttributeSet A = AS.getSlotAttributes(i);
738 Record.push_back(VE.getAttributeGroupID(A));
739 Record.push_back(AS.getSlotIndex(i));
741 for (AttributeSet::iterator I = AS.begin(0), E = AS.end(0);
744 if (Attr.isEnumAttribute()) {
746 Record.push_back(getAttrKindEncoding(Attr.getKindAsEnum()));
747 } else if (Attr.isIntAttribute()) {
749 Record.push_back(getAttrKindEncoding(Attr.getKindAsEnum()));
750 Record.push_back(Attr.getValueAsInt());
752 StringRef Kind = Attr.getKindAsString();
753 StringRef Val = Attr.getValueAsString();
755 Record.push_back(Val.empty() ? 3 : 4);
756 Record.append(Kind.begin(), Kind.end());
759 Record.append(Val.begin(), Val.end());
765 Stream.EmitRecord(bitc::PARAMATTR_GRP_CODE_ENTRY, Record);
773 void ModuleBitcodeWriter::writeAttributeTable() {
774 const std::vector<AttributeSet> &Attrs = VE.getAttributes();
775 if (Attrs.empty()) return;
777 Stream.EnterSubblock(bitc::PARAMATTR_BLOCK_ID, 3);
779 SmallVector<uint64_t, 64> Record;
780 for (unsigned i = 0, e = Attrs.size(); i != e; ++i) {
781 const AttributeSet &A = Attrs[i];
782 for (unsigned i = 0, e = A.getNumSlots(); i != e; ++i)
783 Record.push_back(VE.getAttributeGroupID(A.getSlotAttributes(i)));
785 Stream.EmitRecord(bitc::PARAMATTR_CODE_ENTRY, Record);
792 /// WriteTypeTable - Write out the type table for a module.
793 void ModuleBitcodeWriter::writeTypeTable() {
794 const ValueEnumerator::TypeList &TypeList = VE.getTypes();
796 Stream.EnterSubblock(bitc::TYPE_BLOCK_ID_NEW, 4 /*count from # abbrevs */);
797 SmallVector<uint64_t, 64> TypeVals;
799 uint64_t NumBits = VE.computeBitsRequiredForTypeIndicies();
801 // Abbrev for TYPE_CODE_POINTER.
802 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
803 Abbv->Add(BitCodeAbbrevOp(bitc::TYPE_CODE_POINTER));
804 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, NumBits));
805 Abbv->Add(BitCodeAbbrevOp(0)); // Addrspace = 0
806 unsigned PtrAbbrev = Stream.EmitAbbrev(Abbv);
808 // Abbrev for TYPE_CODE_FUNCTION.
809 Abbv = new BitCodeAbbrev();
810 Abbv->Add(BitCodeAbbrevOp(bitc::TYPE_CODE_FUNCTION));
811 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // isvararg
812 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
813 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, NumBits));
815 unsigned FunctionAbbrev = Stream.EmitAbbrev(Abbv);
817 // Abbrev for TYPE_CODE_STRUCT_ANON.
818 Abbv = new BitCodeAbbrev();
819 Abbv->Add(BitCodeAbbrevOp(bitc::TYPE_CODE_STRUCT_ANON));
820 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // ispacked
821 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
822 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, NumBits));
824 unsigned StructAnonAbbrev = Stream.EmitAbbrev(Abbv);
826 // Abbrev for TYPE_CODE_STRUCT_NAME.
827 Abbv = new BitCodeAbbrev();
828 Abbv->Add(BitCodeAbbrevOp(bitc::TYPE_CODE_STRUCT_NAME));
829 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
830 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Char6));
831 unsigned StructNameAbbrev = Stream.EmitAbbrev(Abbv);
833 // Abbrev for TYPE_CODE_STRUCT_NAMED.
834 Abbv = new BitCodeAbbrev();
835 Abbv->Add(BitCodeAbbrevOp(bitc::TYPE_CODE_STRUCT_NAMED));
836 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // ispacked
837 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
838 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, NumBits));
840 unsigned StructNamedAbbrev = Stream.EmitAbbrev(Abbv);
842 // Abbrev for TYPE_CODE_ARRAY.
843 Abbv = new BitCodeAbbrev();
844 Abbv->Add(BitCodeAbbrevOp(bitc::TYPE_CODE_ARRAY));
845 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8)); // size
846 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, NumBits));
848 unsigned ArrayAbbrev = Stream.EmitAbbrev(Abbv);
850 // Emit an entry count so the reader can reserve space.
851 TypeVals.push_back(TypeList.size());
852 Stream.EmitRecord(bitc::TYPE_CODE_NUMENTRY, TypeVals);
855 // Loop over all of the types, emitting each in turn.
856 for (unsigned i = 0, e = TypeList.size(); i != e; ++i) {
857 Type *T = TypeList[i];
861 switch (T->getTypeID()) {
862 case Type::VoidTyID: Code = bitc::TYPE_CODE_VOID; break;
863 case Type::HalfTyID: Code = bitc::TYPE_CODE_HALF; break;
864 case Type::FloatTyID: Code = bitc::TYPE_CODE_FLOAT; break;
865 case Type::DoubleTyID: Code = bitc::TYPE_CODE_DOUBLE; break;
866 case Type::X86_FP80TyID: Code = bitc::TYPE_CODE_X86_FP80; break;
867 case Type::FP128TyID: Code = bitc::TYPE_CODE_FP128; break;
868 case Type::PPC_FP128TyID: Code = bitc::TYPE_CODE_PPC_FP128; break;
869 case Type::LabelTyID: Code = bitc::TYPE_CODE_LABEL; break;
870 case Type::MetadataTyID: Code = bitc::TYPE_CODE_METADATA; break;
871 case Type::X86_MMXTyID: Code = bitc::TYPE_CODE_X86_MMX; break;
872 case Type::TokenTyID: Code = bitc::TYPE_CODE_TOKEN; break;
873 case Type::IntegerTyID:
875 Code = bitc::TYPE_CODE_INTEGER;
876 TypeVals.push_back(cast<IntegerType>(T)->getBitWidth());
878 case Type::PointerTyID: {
879 PointerType *PTy = cast<PointerType>(T);
880 // POINTER: [pointee type, address space]
881 Code = bitc::TYPE_CODE_POINTER;
882 TypeVals.push_back(VE.getTypeID(PTy->getElementType()));
883 unsigned AddressSpace = PTy->getAddressSpace();
884 TypeVals.push_back(AddressSpace);
885 if (AddressSpace == 0) AbbrevToUse = PtrAbbrev;
888 case Type::FunctionTyID: {
889 FunctionType *FT = cast<FunctionType>(T);
890 // FUNCTION: [isvararg, retty, paramty x N]
891 Code = bitc::TYPE_CODE_FUNCTION;
892 TypeVals.push_back(FT->isVarArg());
893 TypeVals.push_back(VE.getTypeID(FT->getReturnType()));
894 for (unsigned i = 0, e = FT->getNumParams(); i != e; ++i)
895 TypeVals.push_back(VE.getTypeID(FT->getParamType(i)));
896 AbbrevToUse = FunctionAbbrev;
899 case Type::StructTyID: {
900 StructType *ST = cast<StructType>(T);
901 // STRUCT: [ispacked, eltty x N]
902 TypeVals.push_back(ST->isPacked());
903 // Output all of the element types.
904 for (StructType::element_iterator I = ST->element_begin(),
905 E = ST->element_end(); I != E; ++I)
906 TypeVals.push_back(VE.getTypeID(*I));
908 if (ST->isLiteral()) {
909 Code = bitc::TYPE_CODE_STRUCT_ANON;
910 AbbrevToUse = StructAnonAbbrev;
912 if (ST->isOpaque()) {
913 Code = bitc::TYPE_CODE_OPAQUE;
915 Code = bitc::TYPE_CODE_STRUCT_NAMED;
916 AbbrevToUse = StructNamedAbbrev;
919 // Emit the name if it is present.
920 if (!ST->getName().empty())
921 writeStringRecord(bitc::TYPE_CODE_STRUCT_NAME, ST->getName(),
926 case Type::ArrayTyID: {
927 ArrayType *AT = cast<ArrayType>(T);
928 // ARRAY: [numelts, eltty]
929 Code = bitc::TYPE_CODE_ARRAY;
930 TypeVals.push_back(AT->getNumElements());
931 TypeVals.push_back(VE.getTypeID(AT->getElementType()));
932 AbbrevToUse = ArrayAbbrev;
935 case Type::VectorTyID: {
936 VectorType *VT = cast<VectorType>(T);
937 // VECTOR [numelts, eltty]
938 Code = bitc::TYPE_CODE_VECTOR;
939 TypeVals.push_back(VT->getNumElements());
940 TypeVals.push_back(VE.getTypeID(VT->getElementType()));
945 // Emit the finished record.
946 Stream.EmitRecord(Code, TypeVals, AbbrevToUse);
953 static unsigned getEncodedLinkage(const GlobalValue::LinkageTypes Linkage) {
955 case GlobalValue::ExternalLinkage:
957 case GlobalValue::WeakAnyLinkage:
959 case GlobalValue::AppendingLinkage:
961 case GlobalValue::InternalLinkage:
963 case GlobalValue::LinkOnceAnyLinkage:
965 case GlobalValue::ExternalWeakLinkage:
967 case GlobalValue::CommonLinkage:
969 case GlobalValue::PrivateLinkage:
971 case GlobalValue::WeakODRLinkage:
973 case GlobalValue::LinkOnceODRLinkage:
975 case GlobalValue::AvailableExternallyLinkage:
978 llvm_unreachable("Invalid linkage");
981 static unsigned getEncodedLinkage(const GlobalValue &GV) {
982 return getEncodedLinkage(GV.getLinkage());
985 // Decode the flags for GlobalValue in the summary
986 static uint64_t getEncodedGVSummaryFlags(GlobalValueSummary::GVFlags Flags) {
987 uint64_t RawFlags = 0;
989 RawFlags |= Flags.HasSection; // bool
991 // Linkage don't need to be remapped at that time for the summary. Any future
992 // change to the getEncodedLinkage() function will need to be taken into
993 // account here as well.
994 RawFlags = (RawFlags << 4) | Flags.Linkage; // 4 bits
999 static unsigned getEncodedVisibility(const GlobalValue &GV) {
1000 switch (GV.getVisibility()) {
1001 case GlobalValue::DefaultVisibility: return 0;
1002 case GlobalValue::HiddenVisibility: return 1;
1003 case GlobalValue::ProtectedVisibility: return 2;
1005 llvm_unreachable("Invalid visibility");
1008 static unsigned getEncodedDLLStorageClass(const GlobalValue &GV) {
1009 switch (GV.getDLLStorageClass()) {
1010 case GlobalValue::DefaultStorageClass: return 0;
1011 case GlobalValue::DLLImportStorageClass: return 1;
1012 case GlobalValue::DLLExportStorageClass: return 2;
1014 llvm_unreachable("Invalid DLL storage class");
1017 static unsigned getEncodedThreadLocalMode(const GlobalValue &GV) {
1018 switch (GV.getThreadLocalMode()) {
1019 case GlobalVariable::NotThreadLocal: return 0;
1020 case GlobalVariable::GeneralDynamicTLSModel: return 1;
1021 case GlobalVariable::LocalDynamicTLSModel: return 2;
1022 case GlobalVariable::InitialExecTLSModel: return 3;
1023 case GlobalVariable::LocalExecTLSModel: return 4;
1025 llvm_unreachable("Invalid TLS model");
1028 static unsigned getEncodedComdatSelectionKind(const Comdat &C) {
1029 switch (C.getSelectionKind()) {
1031 return bitc::COMDAT_SELECTION_KIND_ANY;
1032 case Comdat::ExactMatch:
1033 return bitc::COMDAT_SELECTION_KIND_EXACT_MATCH;
1034 case Comdat::Largest:
1035 return bitc::COMDAT_SELECTION_KIND_LARGEST;
1036 case Comdat::NoDuplicates:
1037 return bitc::COMDAT_SELECTION_KIND_NO_DUPLICATES;
1038 case Comdat::SameSize:
1039 return bitc::COMDAT_SELECTION_KIND_SAME_SIZE;
1041 llvm_unreachable("Invalid selection kind");
1044 static unsigned getEncodedUnnamedAddr(const GlobalValue &GV) {
1045 switch (GV.getUnnamedAddr()) {
1046 case GlobalValue::UnnamedAddr::None: return 0;
1047 case GlobalValue::UnnamedAddr::Local: return 2;
1048 case GlobalValue::UnnamedAddr::Global: return 1;
1050 llvm_unreachable("Invalid unnamed_addr");
1053 void ModuleBitcodeWriter::writeComdats() {
1054 SmallVector<unsigned, 64> Vals;
1055 for (const Comdat *C : VE.getComdats()) {
1056 // COMDAT: [selection_kind, name]
1057 Vals.push_back(getEncodedComdatSelectionKind(*C));
1058 size_t Size = C->getName().size();
1059 assert(isUInt<32>(Size));
1060 Vals.push_back(Size);
1061 for (char Chr : C->getName())
1062 Vals.push_back((unsigned char)Chr);
1063 Stream.EmitRecord(bitc::MODULE_CODE_COMDAT, Vals, /*AbbrevToUse=*/0);
1068 /// Write a record that will eventually hold the word offset of the
1069 /// module-level VST. For now the offset is 0, which will be backpatched
1070 /// after the real VST is written. Saves the bit offset to backpatch.
1071 void BitcodeWriter::writeValueSymbolTableForwardDecl() {
1072 // Write a placeholder value in for the offset of the real VST,
1073 // which is written after the function blocks so that it can include
1074 // the offset of each function. The placeholder offset will be
1075 // updated when the real VST is written.
1076 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
1077 Abbv->Add(BitCodeAbbrevOp(bitc::MODULE_CODE_VSTOFFSET));
1078 // Blocks are 32-bit aligned, so we can use a 32-bit word offset to
1079 // hold the real VST offset. Must use fixed instead of VBR as we don't
1080 // know how many VBR chunks to reserve ahead of time.
1081 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 32));
1082 unsigned VSTOffsetAbbrev = Stream.EmitAbbrev(Abbv);
1084 // Emit the placeholder
1085 uint64_t Vals[] = {bitc::MODULE_CODE_VSTOFFSET, 0};
1086 Stream.EmitRecordWithAbbrev(VSTOffsetAbbrev, Vals);
1088 // Compute and save the bit offset to the placeholder, which will be
1089 // patched when the real VST is written. We can simply subtract the 32-bit
1090 // fixed size from the current bit number to get the location to backpatch.
1091 VSTOffsetPlaceholder = Stream.GetCurrentBitNo() - 32;
1094 enum StringEncoding { SE_Char6, SE_Fixed7, SE_Fixed8 };
1096 /// Determine the encoding to use for the given string name and length.
1097 static StringEncoding getStringEncoding(const char *Str, unsigned StrLen) {
1098 bool isChar6 = true;
1099 for (const char *C = Str, *E = C + StrLen; C != E; ++C) {
1101 isChar6 = BitCodeAbbrevOp::isChar6(*C);
1102 if ((unsigned char)*C & 128)
1103 // don't bother scanning the rest.
1112 /// Emit top-level description of module, including target triple, inline asm,
1113 /// descriptors for global variables, and function prototype info.
1114 /// Returns the bit offset to backpatch with the location of the real VST.
1115 void ModuleBitcodeWriter::writeModuleInfo() {
1116 // Emit various pieces of data attached to a module.
1117 if (!M.getTargetTriple().empty())
1118 writeStringRecord(bitc::MODULE_CODE_TRIPLE, M.getTargetTriple(),
1120 const std::string &DL = M.getDataLayoutStr();
1122 writeStringRecord(bitc::MODULE_CODE_DATALAYOUT, DL, 0 /*TODO*/);
1123 if (!M.getModuleInlineAsm().empty())
1124 writeStringRecord(bitc::MODULE_CODE_ASM, M.getModuleInlineAsm(),
1127 // Emit information about sections and GC, computing how many there are. Also
1128 // compute the maximum alignment value.
1129 std::map<std::string, unsigned> SectionMap;
1130 std::map<std::string, unsigned> GCMap;
1131 unsigned MaxAlignment = 0;
1132 unsigned MaxGlobalType = 0;
1133 for (const GlobalValue &GV : M.globals()) {
1134 MaxAlignment = std::max(MaxAlignment, GV.getAlignment());
1135 MaxGlobalType = std::max(MaxGlobalType, VE.getTypeID(GV.getValueType()));
1136 if (GV.hasSection()) {
1137 // Give section names unique ID's.
1138 unsigned &Entry = SectionMap[GV.getSection()];
1140 writeStringRecord(bitc::MODULE_CODE_SECTIONNAME, GV.getSection(),
1142 Entry = SectionMap.size();
1146 for (const Function &F : M) {
1147 MaxAlignment = std::max(MaxAlignment, F.getAlignment());
1148 if (F.hasSection()) {
1149 // Give section names unique ID's.
1150 unsigned &Entry = SectionMap[F.getSection()];
1152 writeStringRecord(bitc::MODULE_CODE_SECTIONNAME, F.getSection(),
1154 Entry = SectionMap.size();
1158 // Same for GC names.
1159 unsigned &Entry = GCMap[F.getGC()];
1161 writeStringRecord(bitc::MODULE_CODE_GCNAME, F.getGC(), 0 /*TODO*/);
1162 Entry = GCMap.size();
1167 // Emit abbrev for globals, now that we know # sections and max alignment.
1168 unsigned SimpleGVarAbbrev = 0;
1169 if (!M.global_empty()) {
1170 // Add an abbrev for common globals with no visibility or thread localness.
1171 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
1172 Abbv->Add(BitCodeAbbrevOp(bitc::MODULE_CODE_GLOBALVAR));
1173 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed,
1174 Log2_32_Ceil(MaxGlobalType+1)));
1175 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // AddrSpace << 2
1176 //| explicitType << 1
1178 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Initializer.
1179 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 5)); // Linkage.
1180 if (MaxAlignment == 0) // Alignment.
1181 Abbv->Add(BitCodeAbbrevOp(0));
1183 unsigned MaxEncAlignment = Log2_32(MaxAlignment)+1;
1184 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed,
1185 Log2_32_Ceil(MaxEncAlignment+1)));
1187 if (SectionMap.empty()) // Section.
1188 Abbv->Add(BitCodeAbbrevOp(0));
1190 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed,
1191 Log2_32_Ceil(SectionMap.size()+1)));
1192 // Don't bother emitting vis + thread local.
1193 SimpleGVarAbbrev = Stream.EmitAbbrev(Abbv);
1196 // Emit the global variable information.
1197 SmallVector<unsigned, 64> Vals;
1198 for (const GlobalVariable &GV : M.globals()) {
1199 unsigned AbbrevToUse = 0;
1201 // GLOBALVAR: [type, isconst, initid,
1202 // linkage, alignment, section, visibility, threadlocal,
1203 // unnamed_addr, externally_initialized, dllstorageclass,
1205 Vals.push_back(VE.getTypeID(GV.getValueType()));
1206 Vals.push_back(GV.getType()->getAddressSpace() << 2 | 2 | GV.isConstant());
1207 Vals.push_back(GV.isDeclaration() ? 0 :
1208 (VE.getValueID(GV.getInitializer()) + 1));
1209 Vals.push_back(getEncodedLinkage(GV));
1210 Vals.push_back(Log2_32(GV.getAlignment())+1);
1211 Vals.push_back(GV.hasSection() ? SectionMap[GV.getSection()] : 0);
1212 if (GV.isThreadLocal() ||
1213 GV.getVisibility() != GlobalValue::DefaultVisibility ||
1214 GV.getUnnamedAddr() != GlobalValue::UnnamedAddr::None ||
1215 GV.isExternallyInitialized() ||
1216 GV.getDLLStorageClass() != GlobalValue::DefaultStorageClass ||
1218 Vals.push_back(getEncodedVisibility(GV));
1219 Vals.push_back(getEncodedThreadLocalMode(GV));
1220 Vals.push_back(getEncodedUnnamedAddr(GV));
1221 Vals.push_back(GV.isExternallyInitialized());
1222 Vals.push_back(getEncodedDLLStorageClass(GV));
1223 Vals.push_back(GV.hasComdat() ? VE.getComdatID(GV.getComdat()) : 0);
1225 AbbrevToUse = SimpleGVarAbbrev;
1228 Stream.EmitRecord(bitc::MODULE_CODE_GLOBALVAR, Vals, AbbrevToUse);
1232 // Emit the function proto information.
1233 for (const Function &F : M) {
1234 // FUNCTION: [type, callingconv, isproto, linkage, paramattrs, alignment,
1235 // section, visibility, gc, unnamed_addr, prologuedata,
1236 // dllstorageclass, comdat, prefixdata, personalityfn]
1237 Vals.push_back(VE.getTypeID(F.getFunctionType()));
1238 Vals.push_back(F.getCallingConv());
1239 Vals.push_back(F.isDeclaration());
1240 Vals.push_back(getEncodedLinkage(F));
1241 Vals.push_back(VE.getAttributeID(F.getAttributes()));
1242 Vals.push_back(Log2_32(F.getAlignment())+1);
1243 Vals.push_back(F.hasSection() ? SectionMap[F.getSection()] : 0);
1244 Vals.push_back(getEncodedVisibility(F));
1245 Vals.push_back(F.hasGC() ? GCMap[F.getGC()] : 0);
1246 Vals.push_back(getEncodedUnnamedAddr(F));
1247 Vals.push_back(F.hasPrologueData() ? (VE.getValueID(F.getPrologueData()) + 1)
1249 Vals.push_back(getEncodedDLLStorageClass(F));
1250 Vals.push_back(F.hasComdat() ? VE.getComdatID(F.getComdat()) : 0);
1251 Vals.push_back(F.hasPrefixData() ? (VE.getValueID(F.getPrefixData()) + 1)
1254 F.hasPersonalityFn() ? (VE.getValueID(F.getPersonalityFn()) + 1) : 0);
1256 unsigned AbbrevToUse = 0;
1257 Stream.EmitRecord(bitc::MODULE_CODE_FUNCTION, Vals, AbbrevToUse);
1261 // Emit the alias information.
1262 for (const GlobalAlias &A : M.aliases()) {
1263 // ALIAS: [alias type, aliasee val#, linkage, visibility, dllstorageclass,
1264 // threadlocal, unnamed_addr]
1265 Vals.push_back(VE.getTypeID(A.getValueType()));
1266 Vals.push_back(A.getType()->getAddressSpace());
1267 Vals.push_back(VE.getValueID(A.getAliasee()));
1268 Vals.push_back(getEncodedLinkage(A));
1269 Vals.push_back(getEncodedVisibility(A));
1270 Vals.push_back(getEncodedDLLStorageClass(A));
1271 Vals.push_back(getEncodedThreadLocalMode(A));
1272 Vals.push_back(getEncodedUnnamedAddr(A));
1273 unsigned AbbrevToUse = 0;
1274 Stream.EmitRecord(bitc::MODULE_CODE_ALIAS, Vals, AbbrevToUse);
1278 // Emit the ifunc information.
1279 for (const GlobalIFunc &I : M.ifuncs()) {
1280 // IFUNC: [ifunc type, address space, resolver val#, linkage, visibility]
1281 Vals.push_back(VE.getTypeID(I.getValueType()));
1282 Vals.push_back(I.getType()->getAddressSpace());
1283 Vals.push_back(VE.getValueID(I.getResolver()));
1284 Vals.push_back(getEncodedLinkage(I));
1285 Vals.push_back(getEncodedVisibility(I));
1286 Stream.EmitRecord(bitc::MODULE_CODE_IFUNC, Vals);
1290 // Emit the module's source file name.
1292 StringEncoding Bits = getStringEncoding(M.getSourceFileName().data(),
1293 M.getSourceFileName().size());
1294 BitCodeAbbrevOp AbbrevOpToUse = BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 8);
1295 if (Bits == SE_Char6)
1296 AbbrevOpToUse = BitCodeAbbrevOp(BitCodeAbbrevOp::Char6);
1297 else if (Bits == SE_Fixed7)
1298 AbbrevOpToUse = BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 7);
1300 // MODULE_CODE_SOURCE_FILENAME: [namechar x N]
1301 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
1302 Abbv->Add(BitCodeAbbrevOp(bitc::MODULE_CODE_SOURCE_FILENAME));
1303 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
1304 Abbv->Add(AbbrevOpToUse);
1305 unsigned FilenameAbbrev = Stream.EmitAbbrev(Abbv);
1307 for (const auto P : M.getSourceFileName())
1308 Vals.push_back((unsigned char)P);
1310 // Emit the finished record.
1311 Stream.EmitRecord(bitc::MODULE_CODE_SOURCE_FILENAME, Vals, FilenameAbbrev);
1315 // If we have a VST, write the VSTOFFSET record placeholder.
1316 if (M.getValueSymbolTable().empty())
1318 writeValueSymbolTableForwardDecl();
1321 static uint64_t getOptimizationFlags(const Value *V) {
1324 if (const auto *OBO = dyn_cast<OverflowingBinaryOperator>(V)) {
1325 if (OBO->hasNoSignedWrap())
1326 Flags |= 1 << bitc::OBO_NO_SIGNED_WRAP;
1327 if (OBO->hasNoUnsignedWrap())
1328 Flags |= 1 << bitc::OBO_NO_UNSIGNED_WRAP;
1329 } else if (const auto *PEO = dyn_cast<PossiblyExactOperator>(V)) {
1331 Flags |= 1 << bitc::PEO_EXACT;
1332 } else if (const auto *FPMO = dyn_cast<FPMathOperator>(V)) {
1333 if (FPMO->hasUnsafeAlgebra())
1334 Flags |= FastMathFlags::UnsafeAlgebra;
1335 if (FPMO->hasNoNaNs())
1336 Flags |= FastMathFlags::NoNaNs;
1337 if (FPMO->hasNoInfs())
1338 Flags |= FastMathFlags::NoInfs;
1339 if (FPMO->hasNoSignedZeros())
1340 Flags |= FastMathFlags::NoSignedZeros;
1341 if (FPMO->hasAllowReciprocal())
1342 Flags |= FastMathFlags::AllowReciprocal;
1348 void ModuleBitcodeWriter::writeValueAsMetadata(
1349 const ValueAsMetadata *MD, SmallVectorImpl<uint64_t> &Record) {
1350 // Mimic an MDNode with a value as one operand.
1351 Value *V = MD->getValue();
1352 Record.push_back(VE.getTypeID(V->getType()));
1353 Record.push_back(VE.getValueID(V));
1354 Stream.EmitRecord(bitc::METADATA_VALUE, Record, 0);
1358 void ModuleBitcodeWriter::writeMDTuple(const MDTuple *N,
1359 SmallVectorImpl<uint64_t> &Record,
1361 for (unsigned i = 0, e = N->getNumOperands(); i != e; ++i) {
1362 Metadata *MD = N->getOperand(i);
1363 assert(!(MD && isa<LocalAsMetadata>(MD)) &&
1364 "Unexpected function-local metadata");
1365 Record.push_back(VE.getMetadataOrNullID(MD));
1367 Stream.EmitRecord(N->isDistinct() ? bitc::METADATA_DISTINCT_NODE
1368 : bitc::METADATA_NODE,
1373 unsigned ModuleBitcodeWriter::createDILocationAbbrev() {
1374 // Assume the column is usually under 128, and always output the inlined-at
1375 // location (it's never more expensive than building an array size 1).
1376 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
1377 Abbv->Add(BitCodeAbbrevOp(bitc::METADATA_LOCATION));
1378 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1));
1379 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));
1380 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8));
1381 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));
1382 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));
1383 return Stream.EmitAbbrev(Abbv);
1386 void ModuleBitcodeWriter::writeDILocation(const DILocation *N,
1387 SmallVectorImpl<uint64_t> &Record,
1390 Abbrev = createDILocationAbbrev();
1392 Record.push_back(N->isDistinct());
1393 Record.push_back(N->getLine());
1394 Record.push_back(N->getColumn());
1395 Record.push_back(VE.getMetadataID(N->getScope()));
1396 Record.push_back(VE.getMetadataOrNullID(N->getInlinedAt()));
1398 Stream.EmitRecord(bitc::METADATA_LOCATION, Record, Abbrev);
1402 unsigned ModuleBitcodeWriter::createGenericDINodeAbbrev() {
1403 // Assume the column is usually under 128, and always output the inlined-at
1404 // location (it's never more expensive than building an array size 1).
1405 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
1406 Abbv->Add(BitCodeAbbrevOp(bitc::METADATA_GENERIC_DEBUG));
1407 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1));
1408 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));
1409 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1));
1410 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));
1411 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
1412 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));
1413 return Stream.EmitAbbrev(Abbv);
1416 void ModuleBitcodeWriter::writeGenericDINode(const GenericDINode *N,
1417 SmallVectorImpl<uint64_t> &Record,
1420 Abbrev = createGenericDINodeAbbrev();
1422 Record.push_back(N->isDistinct());
1423 Record.push_back(N->getTag());
1424 Record.push_back(0); // Per-tag version field; unused for now.
1426 for (auto &I : N->operands())
1427 Record.push_back(VE.getMetadataOrNullID(I));
1429 Stream.EmitRecord(bitc::METADATA_GENERIC_DEBUG, Record, Abbrev);
1433 static uint64_t rotateSign(int64_t I) {
1435 return I < 0 ? ~(U << 1) : U << 1;
1438 void ModuleBitcodeWriter::writeDISubrange(const DISubrange *N,
1439 SmallVectorImpl<uint64_t> &Record,
1441 Record.push_back(N->isDistinct());
1442 Record.push_back(N->getCount());
1443 Record.push_back(rotateSign(N->getLowerBound()));
1445 Stream.EmitRecord(bitc::METADATA_SUBRANGE, Record, Abbrev);
1449 void ModuleBitcodeWriter::writeDIEnumerator(const DIEnumerator *N,
1450 SmallVectorImpl<uint64_t> &Record,
1452 Record.push_back(N->isDistinct());
1453 Record.push_back(rotateSign(N->getValue()));
1454 Record.push_back(VE.getMetadataOrNullID(N->getRawName()));
1456 Stream.EmitRecord(bitc::METADATA_ENUMERATOR, Record, Abbrev);
1460 void ModuleBitcodeWriter::writeDIBasicType(const DIBasicType *N,
1461 SmallVectorImpl<uint64_t> &Record,
1463 Record.push_back(N->isDistinct());
1464 Record.push_back(N->getTag());
1465 Record.push_back(VE.getMetadataOrNullID(N->getRawName()));
1466 Record.push_back(N->getSizeInBits());
1467 Record.push_back(N->getAlignInBits());
1468 Record.push_back(N->getEncoding());
1470 Stream.EmitRecord(bitc::METADATA_BASIC_TYPE, Record, Abbrev);
1474 void ModuleBitcodeWriter::writeDIDerivedType(const DIDerivedType *N,
1475 SmallVectorImpl<uint64_t> &Record,
1477 Record.push_back(N->isDistinct());
1478 Record.push_back(N->getTag());
1479 Record.push_back(VE.getMetadataOrNullID(N->getRawName()));
1480 Record.push_back(VE.getMetadataOrNullID(N->getFile()));
1481 Record.push_back(N->getLine());
1482 Record.push_back(VE.getMetadataOrNullID(N->getScope()));
1483 Record.push_back(VE.getMetadataOrNullID(N->getBaseType()));
1484 Record.push_back(N->getSizeInBits());
1485 Record.push_back(N->getAlignInBits());
1486 Record.push_back(N->getOffsetInBits());
1487 Record.push_back(N->getFlags());
1488 Record.push_back(VE.getMetadataOrNullID(N->getExtraData()));
1490 Stream.EmitRecord(bitc::METADATA_DERIVED_TYPE, Record, Abbrev);
1494 void ModuleBitcodeWriter::writeDICompositeType(
1495 const DICompositeType *N, SmallVectorImpl<uint64_t> &Record,
1497 const unsigned IsNotUsedInOldTypeRef = 0x2;
1498 Record.push_back(IsNotUsedInOldTypeRef | (unsigned)N->isDistinct());
1499 Record.push_back(N->getTag());
1500 Record.push_back(VE.getMetadataOrNullID(N->getRawName()));
1501 Record.push_back(VE.getMetadataOrNullID(N->getFile()));
1502 Record.push_back(N->getLine());
1503 Record.push_back(VE.getMetadataOrNullID(N->getScope()));
1504 Record.push_back(VE.getMetadataOrNullID(N->getBaseType()));
1505 Record.push_back(N->getSizeInBits());
1506 Record.push_back(N->getAlignInBits());
1507 Record.push_back(N->getOffsetInBits());
1508 Record.push_back(N->getFlags());
1509 Record.push_back(VE.getMetadataOrNullID(N->getElements().get()));
1510 Record.push_back(N->getRuntimeLang());
1511 Record.push_back(VE.getMetadataOrNullID(N->getVTableHolder()));
1512 Record.push_back(VE.getMetadataOrNullID(N->getTemplateParams().get()));
1513 Record.push_back(VE.getMetadataOrNullID(N->getRawIdentifier()));
1515 Stream.EmitRecord(bitc::METADATA_COMPOSITE_TYPE, Record, Abbrev);
1519 void ModuleBitcodeWriter::writeDISubroutineType(
1520 const DISubroutineType *N, SmallVectorImpl<uint64_t> &Record,
1522 const unsigned HasNoOldTypeRefs = 0x2;
1523 Record.push_back(HasNoOldTypeRefs | (unsigned)N->isDistinct());
1524 Record.push_back(N->getFlags());
1525 Record.push_back(VE.getMetadataOrNullID(N->getTypeArray().get()));
1526 Record.push_back(N->getCC());
1528 Stream.EmitRecord(bitc::METADATA_SUBROUTINE_TYPE, Record, Abbrev);
1532 void ModuleBitcodeWriter::writeDIFile(const DIFile *N,
1533 SmallVectorImpl<uint64_t> &Record,
1535 Record.push_back(N->isDistinct());
1536 Record.push_back(VE.getMetadataOrNullID(N->getRawFilename()));
1537 Record.push_back(VE.getMetadataOrNullID(N->getRawDirectory()));
1539 Stream.EmitRecord(bitc::METADATA_FILE, Record, Abbrev);
1543 void ModuleBitcodeWriter::writeDICompileUnit(const DICompileUnit *N,
1544 SmallVectorImpl<uint64_t> &Record,
1546 assert(N->isDistinct() && "Expected distinct compile units");
1547 Record.push_back(/* IsDistinct */ true);
1548 Record.push_back(N->getSourceLanguage());
1549 Record.push_back(VE.getMetadataOrNullID(N->getFile()));
1550 Record.push_back(VE.getMetadataOrNullID(N->getRawProducer()));
1551 Record.push_back(N->isOptimized());
1552 Record.push_back(VE.getMetadataOrNullID(N->getRawFlags()));
1553 Record.push_back(N->getRuntimeVersion());
1554 Record.push_back(VE.getMetadataOrNullID(N->getRawSplitDebugFilename()));
1555 Record.push_back(N->getEmissionKind());
1556 Record.push_back(VE.getMetadataOrNullID(N->getEnumTypes().get()));
1557 Record.push_back(VE.getMetadataOrNullID(N->getRetainedTypes().get()));
1558 Record.push_back(/* subprograms */ 0);
1559 Record.push_back(VE.getMetadataOrNullID(N->getGlobalVariables().get()));
1560 Record.push_back(VE.getMetadataOrNullID(N->getImportedEntities().get()));
1561 Record.push_back(N->getDWOId());
1562 Record.push_back(VE.getMetadataOrNullID(N->getMacros().get()));
1564 Stream.EmitRecord(bitc::METADATA_COMPILE_UNIT, Record, Abbrev);
1568 void ModuleBitcodeWriter::writeDISubprogram(const DISubprogram *N,
1569 SmallVectorImpl<uint64_t> &Record,
1571 uint64_t HasUnitFlag = 1 << 1;
1572 Record.push_back(N->isDistinct() | HasUnitFlag);
1573 Record.push_back(VE.getMetadataOrNullID(N->getScope()));
1574 Record.push_back(VE.getMetadataOrNullID(N->getRawName()));
1575 Record.push_back(VE.getMetadataOrNullID(N->getRawLinkageName()));
1576 Record.push_back(VE.getMetadataOrNullID(N->getFile()));
1577 Record.push_back(N->getLine());
1578 Record.push_back(VE.getMetadataOrNullID(N->getType()));
1579 Record.push_back(N->isLocalToUnit());
1580 Record.push_back(N->isDefinition());
1581 Record.push_back(N->getScopeLine());
1582 Record.push_back(VE.getMetadataOrNullID(N->getContainingType()));
1583 Record.push_back(N->getVirtuality());
1584 Record.push_back(N->getVirtualIndex());
1585 Record.push_back(N->getFlags());
1586 Record.push_back(N->isOptimized());
1587 Record.push_back(VE.getMetadataOrNullID(N->getRawUnit()));
1588 Record.push_back(VE.getMetadataOrNullID(N->getTemplateParams().get()));
1589 Record.push_back(VE.getMetadataOrNullID(N->getDeclaration()));
1590 Record.push_back(VE.getMetadataOrNullID(N->getVariables().get()));
1591 Record.push_back(N->getThisAdjustment());
1593 Stream.EmitRecord(bitc::METADATA_SUBPROGRAM, Record, Abbrev);
1597 void ModuleBitcodeWriter::writeDILexicalBlock(const DILexicalBlock *N,
1598 SmallVectorImpl<uint64_t> &Record,
1600 Record.push_back(N->isDistinct());
1601 Record.push_back(VE.getMetadataOrNullID(N->getScope()));
1602 Record.push_back(VE.getMetadataOrNullID(N->getFile()));
1603 Record.push_back(N->getLine());
1604 Record.push_back(N->getColumn());
1606 Stream.EmitRecord(bitc::METADATA_LEXICAL_BLOCK, Record, Abbrev);
1610 void ModuleBitcodeWriter::writeDILexicalBlockFile(
1611 const DILexicalBlockFile *N, SmallVectorImpl<uint64_t> &Record,
1613 Record.push_back(N->isDistinct());
1614 Record.push_back(VE.getMetadataOrNullID(N->getScope()));
1615 Record.push_back(VE.getMetadataOrNullID(N->getFile()));
1616 Record.push_back(N->getDiscriminator());
1618 Stream.EmitRecord(bitc::METADATA_LEXICAL_BLOCK_FILE, Record, Abbrev);
1622 void ModuleBitcodeWriter::writeDINamespace(const DINamespace *N,
1623 SmallVectorImpl<uint64_t> &Record,
1625 Record.push_back(N->isDistinct());
1626 Record.push_back(VE.getMetadataOrNullID(N->getScope()));
1627 Record.push_back(VE.getMetadataOrNullID(N->getFile()));
1628 Record.push_back(VE.getMetadataOrNullID(N->getRawName()));
1629 Record.push_back(N->getLine());
1631 Stream.EmitRecord(bitc::METADATA_NAMESPACE, Record, Abbrev);
1635 void ModuleBitcodeWriter::writeDIMacro(const DIMacro *N,
1636 SmallVectorImpl<uint64_t> &Record,
1638 Record.push_back(N->isDistinct());
1639 Record.push_back(N->getMacinfoType());
1640 Record.push_back(N->getLine());
1641 Record.push_back(VE.getMetadataOrNullID(N->getRawName()));
1642 Record.push_back(VE.getMetadataOrNullID(N->getRawValue()));
1644 Stream.EmitRecord(bitc::METADATA_MACRO, Record, Abbrev);
1648 void ModuleBitcodeWriter::writeDIMacroFile(const DIMacroFile *N,
1649 SmallVectorImpl<uint64_t> &Record,
1651 Record.push_back(N->isDistinct());
1652 Record.push_back(N->getMacinfoType());
1653 Record.push_back(N->getLine());
1654 Record.push_back(VE.getMetadataOrNullID(N->getFile()));
1655 Record.push_back(VE.getMetadataOrNullID(N->getElements().get()));
1657 Stream.EmitRecord(bitc::METADATA_MACRO_FILE, Record, Abbrev);
1661 void ModuleBitcodeWriter::writeDIModule(const DIModule *N,
1662 SmallVectorImpl<uint64_t> &Record,
1664 Record.push_back(N->isDistinct());
1665 for (auto &I : N->operands())
1666 Record.push_back(VE.getMetadataOrNullID(I));
1668 Stream.EmitRecord(bitc::METADATA_MODULE, Record, Abbrev);
1672 void ModuleBitcodeWriter::writeDITemplateTypeParameter(
1673 const DITemplateTypeParameter *N, SmallVectorImpl<uint64_t> &Record,
1675 Record.push_back(N->isDistinct());
1676 Record.push_back(VE.getMetadataOrNullID(N->getRawName()));
1677 Record.push_back(VE.getMetadataOrNullID(N->getType()));
1679 Stream.EmitRecord(bitc::METADATA_TEMPLATE_TYPE, Record, Abbrev);
1683 void ModuleBitcodeWriter::writeDITemplateValueParameter(
1684 const DITemplateValueParameter *N, SmallVectorImpl<uint64_t> &Record,
1686 Record.push_back(N->isDistinct());
1687 Record.push_back(N->getTag());
1688 Record.push_back(VE.getMetadataOrNullID(N->getRawName()));
1689 Record.push_back(VE.getMetadataOrNullID(N->getType()));
1690 Record.push_back(VE.getMetadataOrNullID(N->getValue()));
1692 Stream.EmitRecord(bitc::METADATA_TEMPLATE_VALUE, Record, Abbrev);
1696 void ModuleBitcodeWriter::writeDIGlobalVariable(
1697 const DIGlobalVariable *N, SmallVectorImpl<uint64_t> &Record,
1699 Record.push_back(N->isDistinct());
1700 Record.push_back(VE.getMetadataOrNullID(N->getScope()));
1701 Record.push_back(VE.getMetadataOrNullID(N->getRawName()));
1702 Record.push_back(VE.getMetadataOrNullID(N->getRawLinkageName()));
1703 Record.push_back(VE.getMetadataOrNullID(N->getFile()));
1704 Record.push_back(N->getLine());
1705 Record.push_back(VE.getMetadataOrNullID(N->getType()));
1706 Record.push_back(N->isLocalToUnit());
1707 Record.push_back(N->isDefinition());
1708 Record.push_back(VE.getMetadataOrNullID(N->getRawVariable()));
1709 Record.push_back(VE.getMetadataOrNullID(N->getStaticDataMemberDeclaration()));
1711 Stream.EmitRecord(bitc::METADATA_GLOBAL_VAR, Record, Abbrev);
1715 void ModuleBitcodeWriter::writeDILocalVariable(
1716 const DILocalVariable *N, SmallVectorImpl<uint64_t> &Record,
1718 Record.push_back(N->isDistinct());
1719 Record.push_back(VE.getMetadataOrNullID(N->getScope()));
1720 Record.push_back(VE.getMetadataOrNullID(N->getRawName()));
1721 Record.push_back(VE.getMetadataOrNullID(N->getFile()));
1722 Record.push_back(N->getLine());
1723 Record.push_back(VE.getMetadataOrNullID(N->getType()));
1724 Record.push_back(N->getArg());
1725 Record.push_back(N->getFlags());
1727 Stream.EmitRecord(bitc::METADATA_LOCAL_VAR, Record, Abbrev);
1731 void ModuleBitcodeWriter::writeDIExpression(const DIExpression *N,
1732 SmallVectorImpl<uint64_t> &Record,
1734 Record.reserve(N->getElements().size() + 1);
1736 Record.push_back(N->isDistinct());
1737 Record.append(N->elements_begin(), N->elements_end());
1739 Stream.EmitRecord(bitc::METADATA_EXPRESSION, Record, Abbrev);
1743 void ModuleBitcodeWriter::writeDIObjCProperty(const DIObjCProperty *N,
1744 SmallVectorImpl<uint64_t> &Record,
1746 Record.push_back(N->isDistinct());
1747 Record.push_back(VE.getMetadataOrNullID(N->getRawName()));
1748 Record.push_back(VE.getMetadataOrNullID(N->getFile()));
1749 Record.push_back(N->getLine());
1750 Record.push_back(VE.getMetadataOrNullID(N->getRawSetterName()));
1751 Record.push_back(VE.getMetadataOrNullID(N->getRawGetterName()));
1752 Record.push_back(N->getAttributes());
1753 Record.push_back(VE.getMetadataOrNullID(N->getType()));
1755 Stream.EmitRecord(bitc::METADATA_OBJC_PROPERTY, Record, Abbrev);
1759 void ModuleBitcodeWriter::writeDIImportedEntity(
1760 const DIImportedEntity *N, SmallVectorImpl<uint64_t> &Record,
1762 Record.push_back(N->isDistinct());
1763 Record.push_back(N->getTag());
1764 Record.push_back(VE.getMetadataOrNullID(N->getScope()));
1765 Record.push_back(VE.getMetadataOrNullID(N->getEntity()));
1766 Record.push_back(N->getLine());
1767 Record.push_back(VE.getMetadataOrNullID(N->getRawName()));
1769 Stream.EmitRecord(bitc::METADATA_IMPORTED_ENTITY, Record, Abbrev);
1773 unsigned ModuleBitcodeWriter::createNamedMetadataAbbrev() {
1774 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
1775 Abbv->Add(BitCodeAbbrevOp(bitc::METADATA_NAME));
1776 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
1777 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 8));
1778 return Stream.EmitAbbrev(Abbv);
1781 void ModuleBitcodeWriter::writeNamedMetadata(
1782 SmallVectorImpl<uint64_t> &Record) {
1783 if (M.named_metadata_empty())
1786 unsigned Abbrev = createNamedMetadataAbbrev();
1787 for (const NamedMDNode &NMD : M.named_metadata()) {
1789 StringRef Str = NMD.getName();
1790 Record.append(Str.bytes_begin(), Str.bytes_end());
1791 Stream.EmitRecord(bitc::METADATA_NAME, Record, Abbrev);
1794 // Write named metadata operands.
1795 for (const MDNode *N : NMD.operands())
1796 Record.push_back(VE.getMetadataID(N));
1797 Stream.EmitRecord(bitc::METADATA_NAMED_NODE, Record, 0);
1802 unsigned ModuleBitcodeWriter::createMetadataStringsAbbrev() {
1803 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
1804 Abbv->Add(BitCodeAbbrevOp(bitc::METADATA_STRINGS));
1805 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // # of strings
1806 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // offset to chars
1807 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob));
1808 return Stream.EmitAbbrev(Abbv);
1811 /// Write out a record for MDString.
1813 /// All the metadata strings in a metadata block are emitted in a single
1814 /// record. The sizes and strings themselves are shoved into a blob.
1815 void ModuleBitcodeWriter::writeMetadataStrings(
1816 ArrayRef<const Metadata *> Strings, SmallVectorImpl<uint64_t> &Record) {
1817 if (Strings.empty())
1820 // Start the record with the number of strings.
1821 Record.push_back(bitc::METADATA_STRINGS);
1822 Record.push_back(Strings.size());
1824 // Emit the sizes of the strings in the blob.
1825 SmallString<256> Blob;
1827 BitstreamWriter W(Blob);
1828 for (const Metadata *MD : Strings)
1829 W.EmitVBR(cast<MDString>(MD)->getLength(), 6);
1833 // Add the offset to the strings to the record.
1834 Record.push_back(Blob.size());
1836 // Add the strings to the blob.
1837 for (const Metadata *MD : Strings)
1838 Blob.append(cast<MDString>(MD)->getString());
1840 // Emit the final record.
1841 Stream.EmitRecordWithBlob(createMetadataStringsAbbrev(), Record, Blob);
1845 void ModuleBitcodeWriter::writeMetadataRecords(
1846 ArrayRef<const Metadata *> MDs, SmallVectorImpl<uint64_t> &Record) {
1850 // Initialize MDNode abbreviations.
1851 #define HANDLE_MDNODE_LEAF(CLASS) unsigned CLASS##Abbrev = 0;
1852 #include "llvm/IR/Metadata.def"
1854 for (const Metadata *MD : MDs) {
1855 if (const MDNode *N = dyn_cast<MDNode>(MD)) {
1856 assert(N->isResolved() && "Expected forward references to be resolved");
1858 switch (N->getMetadataID()) {
1860 llvm_unreachable("Invalid MDNode subclass");
1861 #define HANDLE_MDNODE_LEAF(CLASS) \
1862 case Metadata::CLASS##Kind: \
1863 write##CLASS(cast<CLASS>(N), Record, CLASS##Abbrev); \
1865 #include "llvm/IR/Metadata.def"
1868 writeValueAsMetadata(cast<ValueAsMetadata>(MD), Record);
1872 void ModuleBitcodeWriter::writeModuleMetadata() {
1873 if (!VE.hasMDs() && M.named_metadata_empty())
1876 Stream.EnterSubblock(bitc::METADATA_BLOCK_ID, 3);
1877 SmallVector<uint64_t, 64> Record;
1878 writeMetadataStrings(VE.getMDStrings(), Record);
1879 writeMetadataRecords(VE.getNonMDStrings(), Record);
1880 writeNamedMetadata(Record);
1882 auto AddDeclAttachedMetadata = [&](const GlobalObject &GO) {
1883 SmallVector<uint64_t, 4> Record;
1884 Record.push_back(VE.getValueID(&GO));
1885 pushGlobalMetadataAttachment(Record, GO);
1886 Stream.EmitRecord(bitc::METADATA_GLOBAL_DECL_ATTACHMENT, Record);
1888 for (const Function &F : M)
1889 if (F.isDeclaration() && F.hasMetadata())
1890 AddDeclAttachedMetadata(F);
1891 // FIXME: Only store metadata for declarations here, and move data for global
1892 // variable definitions to a separate block (PR28134).
1893 for (const GlobalVariable &GV : M.globals())
1894 if (GV.hasMetadata())
1895 AddDeclAttachedMetadata(GV);
1900 void ModuleBitcodeWriter::writeFunctionMetadata(const Function &F) {
1904 Stream.EnterSubblock(bitc::METADATA_BLOCK_ID, 3);
1905 SmallVector<uint64_t, 64> Record;
1906 writeMetadataStrings(VE.getMDStrings(), Record);
1907 writeMetadataRecords(VE.getNonMDStrings(), Record);
1911 void ModuleBitcodeWriter::pushGlobalMetadataAttachment(
1912 SmallVectorImpl<uint64_t> &Record, const GlobalObject &GO) {
1913 // [n x [id, mdnode]]
1914 SmallVector<std::pair<unsigned, MDNode *>, 4> MDs;
1915 GO.getAllMetadata(MDs);
1916 for (const auto &I : MDs) {
1917 Record.push_back(I.first);
1918 Record.push_back(VE.getMetadataID(I.second));
1922 void ModuleBitcodeWriter::writeFunctionMetadataAttachment(const Function &F) {
1923 Stream.EnterSubblock(bitc::METADATA_ATTACHMENT_ID, 3);
1925 SmallVector<uint64_t, 64> Record;
1927 if (F.hasMetadata()) {
1928 pushGlobalMetadataAttachment(Record, F);
1929 Stream.EmitRecord(bitc::METADATA_ATTACHMENT, Record, 0);
1933 // Write metadata attachments
1934 // METADATA_ATTACHMENT - [m x [value, [n x [id, mdnode]]]
1935 SmallVector<std::pair<unsigned, MDNode *>, 4> MDs;
1936 for (const BasicBlock &BB : F)
1937 for (const Instruction &I : BB) {
1939 I.getAllMetadataOtherThanDebugLoc(MDs);
1941 // If no metadata, ignore instruction.
1942 if (MDs.empty()) continue;
1944 Record.push_back(VE.getInstructionID(&I));
1946 for (unsigned i = 0, e = MDs.size(); i != e; ++i) {
1947 Record.push_back(MDs[i].first);
1948 Record.push_back(VE.getMetadataID(MDs[i].second));
1950 Stream.EmitRecord(bitc::METADATA_ATTACHMENT, Record, 0);
1957 void ModuleBitcodeWriter::writeModuleMetadataKinds() {
1958 SmallVector<uint64_t, 64> Record;
1960 // Write metadata kinds
1961 // METADATA_KIND - [n x [id, name]]
1962 SmallVector<StringRef, 8> Names;
1963 M.getMDKindNames(Names);
1965 if (Names.empty()) return;
1967 Stream.EnterSubblock(bitc::METADATA_KIND_BLOCK_ID, 3);
1969 for (unsigned MDKindID = 0, e = Names.size(); MDKindID != e; ++MDKindID) {
1970 Record.push_back(MDKindID);
1971 StringRef KName = Names[MDKindID];
1972 Record.append(KName.begin(), KName.end());
1974 Stream.EmitRecord(bitc::METADATA_KIND, Record, 0);
1981 void ModuleBitcodeWriter::writeOperandBundleTags() {
1982 // Write metadata kinds
1984 // OPERAND_BUNDLE_TAGS_BLOCK_ID : N x OPERAND_BUNDLE_TAG
1986 // OPERAND_BUNDLE_TAG - [strchr x N]
1988 SmallVector<StringRef, 8> Tags;
1989 M.getOperandBundleTags(Tags);
1994 Stream.EnterSubblock(bitc::OPERAND_BUNDLE_TAGS_BLOCK_ID, 3);
1996 SmallVector<uint64_t, 64> Record;
1998 for (auto Tag : Tags) {
1999 Record.append(Tag.begin(), Tag.end());
2001 Stream.EmitRecord(bitc::OPERAND_BUNDLE_TAG, Record, 0);
2008 static void emitSignedInt64(SmallVectorImpl<uint64_t> &Vals, uint64_t V) {
2009 if ((int64_t)V >= 0)
2010 Vals.push_back(V << 1);
2012 Vals.push_back((-V << 1) | 1);
2015 void ModuleBitcodeWriter::writeConstants(unsigned FirstVal, unsigned LastVal,
2017 if (FirstVal == LastVal) return;
2019 Stream.EnterSubblock(bitc::CONSTANTS_BLOCK_ID, 4);
2021 unsigned AggregateAbbrev = 0;
2022 unsigned String8Abbrev = 0;
2023 unsigned CString7Abbrev = 0;
2024 unsigned CString6Abbrev = 0;
2025 // If this is a constant pool for the module, emit module-specific abbrevs.
2027 // Abbrev for CST_CODE_AGGREGATE.
2028 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
2029 Abbv->Add(BitCodeAbbrevOp(bitc::CST_CODE_AGGREGATE));
2030 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
2031 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, Log2_32_Ceil(LastVal+1)));
2032 AggregateAbbrev = Stream.EmitAbbrev(Abbv);
2034 // Abbrev for CST_CODE_STRING.
2035 Abbv = new BitCodeAbbrev();
2036 Abbv->Add(BitCodeAbbrevOp(bitc::CST_CODE_STRING));
2037 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
2038 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 8));
2039 String8Abbrev = Stream.EmitAbbrev(Abbv);
2040 // Abbrev for CST_CODE_CSTRING.
2041 Abbv = new BitCodeAbbrev();
2042 Abbv->Add(BitCodeAbbrevOp(bitc::CST_CODE_CSTRING));
2043 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
2044 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 7));
2045 CString7Abbrev = Stream.EmitAbbrev(Abbv);
2046 // Abbrev for CST_CODE_CSTRING.
2047 Abbv = new BitCodeAbbrev();
2048 Abbv->Add(BitCodeAbbrevOp(bitc::CST_CODE_CSTRING));
2049 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
2050 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Char6));
2051 CString6Abbrev = Stream.EmitAbbrev(Abbv);
2054 SmallVector<uint64_t, 64> Record;
2056 const ValueEnumerator::ValueList &Vals = VE.getValues();
2057 Type *LastTy = nullptr;
2058 for (unsigned i = FirstVal; i != LastVal; ++i) {
2059 const Value *V = Vals[i].first;
2060 // If we need to switch types, do so now.
2061 if (V->getType() != LastTy) {
2062 LastTy = V->getType();
2063 Record.push_back(VE.getTypeID(LastTy));
2064 Stream.EmitRecord(bitc::CST_CODE_SETTYPE, Record,
2065 CONSTANTS_SETTYPE_ABBREV);
2069 if (const InlineAsm *IA = dyn_cast<InlineAsm>(V)) {
2070 Record.push_back(unsigned(IA->hasSideEffects()) |
2071 unsigned(IA->isAlignStack()) << 1 |
2072 unsigned(IA->getDialect()&1) << 2);
2074 // Add the asm string.
2075 const std::string &AsmStr = IA->getAsmString();
2076 Record.push_back(AsmStr.size());
2077 Record.append(AsmStr.begin(), AsmStr.end());
2079 // Add the constraint string.
2080 const std::string &ConstraintStr = IA->getConstraintString();
2081 Record.push_back(ConstraintStr.size());
2082 Record.append(ConstraintStr.begin(), ConstraintStr.end());
2083 Stream.EmitRecord(bitc::CST_CODE_INLINEASM, Record);
2087 const Constant *C = cast<Constant>(V);
2088 unsigned Code = -1U;
2089 unsigned AbbrevToUse = 0;
2090 if (C->isNullValue()) {
2091 Code = bitc::CST_CODE_NULL;
2092 } else if (isa<UndefValue>(C)) {
2093 Code = bitc::CST_CODE_UNDEF;
2094 } else if (const ConstantInt *IV = dyn_cast<ConstantInt>(C)) {
2095 if (IV->getBitWidth() <= 64) {
2096 uint64_t V = IV->getSExtValue();
2097 emitSignedInt64(Record, V);
2098 Code = bitc::CST_CODE_INTEGER;
2099 AbbrevToUse = CONSTANTS_INTEGER_ABBREV;
2100 } else { // Wide integers, > 64 bits in size.
2101 // We have an arbitrary precision integer value to write whose
2102 // bit width is > 64. However, in canonical unsigned integer
2103 // format it is likely that the high bits are going to be zero.
2104 // So, we only write the number of active words.
2105 unsigned NWords = IV->getValue().getActiveWords();
2106 const uint64_t *RawWords = IV->getValue().getRawData();
2107 for (unsigned i = 0; i != NWords; ++i) {
2108 emitSignedInt64(Record, RawWords[i]);
2110 Code = bitc::CST_CODE_WIDE_INTEGER;
2112 } else if (const ConstantFP *CFP = dyn_cast<ConstantFP>(C)) {
2113 Code = bitc::CST_CODE_FLOAT;
2114 Type *Ty = CFP->getType();
2115 if (Ty->isHalfTy() || Ty->isFloatTy() || Ty->isDoubleTy()) {
2116 Record.push_back(CFP->getValueAPF().bitcastToAPInt().getZExtValue());
2117 } else if (Ty->isX86_FP80Ty()) {
2118 // api needed to prevent premature destruction
2119 // bits are not in the same order as a normal i80 APInt, compensate.
2120 APInt api = CFP->getValueAPF().bitcastToAPInt();
2121 const uint64_t *p = api.getRawData();
2122 Record.push_back((p[1] << 48) | (p[0] >> 16));
2123 Record.push_back(p[0] & 0xffffLL);
2124 } else if (Ty->isFP128Ty() || Ty->isPPC_FP128Ty()) {
2125 APInt api = CFP->getValueAPF().bitcastToAPInt();
2126 const uint64_t *p = api.getRawData();
2127 Record.push_back(p[0]);
2128 Record.push_back(p[1]);
2130 assert (0 && "Unknown FP type!");
2132 } else if (isa<ConstantDataSequential>(C) &&
2133 cast<ConstantDataSequential>(C)->isString()) {
2134 const ConstantDataSequential *Str = cast<ConstantDataSequential>(C);
2135 // Emit constant strings specially.
2136 unsigned NumElts = Str->getNumElements();
2137 // If this is a null-terminated string, use the denser CSTRING encoding.
2138 if (Str->isCString()) {
2139 Code = bitc::CST_CODE_CSTRING;
2140 --NumElts; // Don't encode the null, which isn't allowed by char6.
2142 Code = bitc::CST_CODE_STRING;
2143 AbbrevToUse = String8Abbrev;
2145 bool isCStr7 = Code == bitc::CST_CODE_CSTRING;
2146 bool isCStrChar6 = Code == bitc::CST_CODE_CSTRING;
2147 for (unsigned i = 0; i != NumElts; ++i) {
2148 unsigned char V = Str->getElementAsInteger(i);
2149 Record.push_back(V);
2150 isCStr7 &= (V & 128) == 0;
2152 isCStrChar6 = BitCodeAbbrevOp::isChar6(V);
2156 AbbrevToUse = CString6Abbrev;
2158 AbbrevToUse = CString7Abbrev;
2159 } else if (const ConstantDataSequential *CDS =
2160 dyn_cast<ConstantDataSequential>(C)) {
2161 Code = bitc::CST_CODE_DATA;
2162 Type *EltTy = CDS->getType()->getElementType();
2163 if (isa<IntegerType>(EltTy)) {
2164 for (unsigned i = 0, e = CDS->getNumElements(); i != e; ++i)
2165 Record.push_back(CDS->getElementAsInteger(i));
2167 for (unsigned i = 0, e = CDS->getNumElements(); i != e; ++i)
2169 CDS->getElementAsAPFloat(i).bitcastToAPInt().getLimitedValue());
2171 } else if (isa<ConstantAggregate>(C)) {
2172 Code = bitc::CST_CODE_AGGREGATE;
2173 for (const Value *Op : C->operands())
2174 Record.push_back(VE.getValueID(Op));
2175 AbbrevToUse = AggregateAbbrev;
2176 } else if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(C)) {
2177 switch (CE->getOpcode()) {
2179 if (Instruction::isCast(CE->getOpcode())) {
2180 Code = bitc::CST_CODE_CE_CAST;
2181 Record.push_back(getEncodedCastOpcode(CE->getOpcode()));
2182 Record.push_back(VE.getTypeID(C->getOperand(0)->getType()));
2183 Record.push_back(VE.getValueID(C->getOperand(0)));
2184 AbbrevToUse = CONSTANTS_CE_CAST_Abbrev;
2186 assert(CE->getNumOperands() == 2 && "Unknown constant expr!");
2187 Code = bitc::CST_CODE_CE_BINOP;
2188 Record.push_back(getEncodedBinaryOpcode(CE->getOpcode()));
2189 Record.push_back(VE.getValueID(C->getOperand(0)));
2190 Record.push_back(VE.getValueID(C->getOperand(1)));
2191 uint64_t Flags = getOptimizationFlags(CE);
2193 Record.push_back(Flags);
2196 case Instruction::GetElementPtr: {
2197 Code = bitc::CST_CODE_CE_GEP;
2198 const auto *GO = cast<GEPOperator>(C);
2199 if (GO->isInBounds())
2200 Code = bitc::CST_CODE_CE_INBOUNDS_GEP;
2201 Record.push_back(VE.getTypeID(GO->getSourceElementType()));
2202 for (unsigned i = 0, e = CE->getNumOperands(); i != e; ++i) {
2203 Record.push_back(VE.getTypeID(C->getOperand(i)->getType()));
2204 Record.push_back(VE.getValueID(C->getOperand(i)));
2208 case Instruction::Select:
2209 Code = bitc::CST_CODE_CE_SELECT;
2210 Record.push_back(VE.getValueID(C->getOperand(0)));
2211 Record.push_back(VE.getValueID(C->getOperand(1)));
2212 Record.push_back(VE.getValueID(C->getOperand(2)));
2214 case Instruction::ExtractElement:
2215 Code = bitc::CST_CODE_CE_EXTRACTELT;
2216 Record.push_back(VE.getTypeID(C->getOperand(0)->getType()));
2217 Record.push_back(VE.getValueID(C->getOperand(0)));
2218 Record.push_back(VE.getTypeID(C->getOperand(1)->getType()));
2219 Record.push_back(VE.getValueID(C->getOperand(1)));
2221 case Instruction::InsertElement:
2222 Code = bitc::CST_CODE_CE_INSERTELT;
2223 Record.push_back(VE.getValueID(C->getOperand(0)));
2224 Record.push_back(VE.getValueID(C->getOperand(1)));
2225 Record.push_back(VE.getTypeID(C->getOperand(2)->getType()));
2226 Record.push_back(VE.getValueID(C->getOperand(2)));
2228 case Instruction::ShuffleVector:
2229 // If the return type and argument types are the same, this is a
2230 // standard shufflevector instruction. If the types are different,
2231 // then the shuffle is widening or truncating the input vectors, and
2232 // the argument type must also be encoded.
2233 if (C->getType() == C->getOperand(0)->getType()) {
2234 Code = bitc::CST_CODE_CE_SHUFFLEVEC;
2236 Code = bitc::CST_CODE_CE_SHUFVEC_EX;
2237 Record.push_back(VE.getTypeID(C->getOperand(0)->getType()));
2239 Record.push_back(VE.getValueID(C->getOperand(0)));
2240 Record.push_back(VE.getValueID(C->getOperand(1)));
2241 Record.push_back(VE.getValueID(C->getOperand(2)));
2243 case Instruction::ICmp:
2244 case Instruction::FCmp:
2245 Code = bitc::CST_CODE_CE_CMP;
2246 Record.push_back(VE.getTypeID(C->getOperand(0)->getType()));
2247 Record.push_back(VE.getValueID(C->getOperand(0)));
2248 Record.push_back(VE.getValueID(C->getOperand(1)));
2249 Record.push_back(CE->getPredicate());
2252 } else if (const BlockAddress *BA = dyn_cast<BlockAddress>(C)) {
2253 Code = bitc::CST_CODE_BLOCKADDRESS;
2254 Record.push_back(VE.getTypeID(BA->getFunction()->getType()));
2255 Record.push_back(VE.getValueID(BA->getFunction()));
2256 Record.push_back(VE.getGlobalBasicBlockID(BA->getBasicBlock()));
2261 llvm_unreachable("Unknown constant!");
2263 Stream.EmitRecord(Code, Record, AbbrevToUse);
2270 void ModuleBitcodeWriter::writeModuleConstants() {
2271 const ValueEnumerator::ValueList &Vals = VE.getValues();
2273 // Find the first constant to emit, which is the first non-globalvalue value.
2274 // We know globalvalues have been emitted by WriteModuleInfo.
2275 for (unsigned i = 0, e = Vals.size(); i != e; ++i) {
2276 if (!isa<GlobalValue>(Vals[i].first)) {
2277 writeConstants(i, Vals.size(), true);
2283 /// pushValueAndType - The file has to encode both the value and type id for
2284 /// many values, because we need to know what type to create for forward
2285 /// references. However, most operands are not forward references, so this type
2286 /// field is not needed.
2288 /// This function adds V's value ID to Vals. If the value ID is higher than the
2289 /// instruction ID, then it is a forward reference, and it also includes the
2290 /// type ID. The value ID that is written is encoded relative to the InstID.
2291 bool ModuleBitcodeWriter::pushValueAndType(const Value *V, unsigned InstID,
2292 SmallVectorImpl<unsigned> &Vals) {
2293 unsigned ValID = VE.getValueID(V);
2294 // Make encoding relative to the InstID.
2295 Vals.push_back(InstID - ValID);
2296 if (ValID >= InstID) {
2297 Vals.push_back(VE.getTypeID(V->getType()));
2303 void ModuleBitcodeWriter::writeOperandBundles(ImmutableCallSite CS,
2305 SmallVector<unsigned, 64> Record;
2306 LLVMContext &C = CS.getInstruction()->getContext();
2308 for (unsigned i = 0, e = CS.getNumOperandBundles(); i != e; ++i) {
2309 const auto &Bundle = CS.getOperandBundleAt(i);
2310 Record.push_back(C.getOperandBundleTagID(Bundle.getTagName()));
2312 for (auto &Input : Bundle.Inputs)
2313 pushValueAndType(Input, InstID, Record);
2315 Stream.EmitRecord(bitc::FUNC_CODE_OPERAND_BUNDLE, Record);
2320 /// pushValue - Like pushValueAndType, but where the type of the value is
2321 /// omitted (perhaps it was already encoded in an earlier operand).
2322 void ModuleBitcodeWriter::pushValue(const Value *V, unsigned InstID,
2323 SmallVectorImpl<unsigned> &Vals) {
2324 unsigned ValID = VE.getValueID(V);
2325 Vals.push_back(InstID - ValID);
2328 void ModuleBitcodeWriter::pushValueSigned(const Value *V, unsigned InstID,
2329 SmallVectorImpl<uint64_t> &Vals) {
2330 unsigned ValID = VE.getValueID(V);
2331 int64_t diff = ((int32_t)InstID - (int32_t)ValID);
2332 emitSignedInt64(Vals, diff);
2335 /// WriteInstruction - Emit an instruction to the specified stream.
2336 void ModuleBitcodeWriter::writeInstruction(const Instruction &I,
2338 SmallVectorImpl<unsigned> &Vals) {
2340 unsigned AbbrevToUse = 0;
2341 VE.setInstructionID(&I);
2342 switch (I.getOpcode()) {
2344 if (Instruction::isCast(I.getOpcode())) {
2345 Code = bitc::FUNC_CODE_INST_CAST;
2346 if (!pushValueAndType(I.getOperand(0), InstID, Vals))
2347 AbbrevToUse = FUNCTION_INST_CAST_ABBREV;
2348 Vals.push_back(VE.getTypeID(I.getType()));
2349 Vals.push_back(getEncodedCastOpcode(I.getOpcode()));
2351 assert(isa<BinaryOperator>(I) && "Unknown instruction!");
2352 Code = bitc::FUNC_CODE_INST_BINOP;
2353 if (!pushValueAndType(I.getOperand(0), InstID, Vals))
2354 AbbrevToUse = FUNCTION_INST_BINOP_ABBREV;
2355 pushValue(I.getOperand(1), InstID, Vals);
2356 Vals.push_back(getEncodedBinaryOpcode(I.getOpcode()));
2357 uint64_t Flags = getOptimizationFlags(&I);
2359 if (AbbrevToUse == FUNCTION_INST_BINOP_ABBREV)
2360 AbbrevToUse = FUNCTION_INST_BINOP_FLAGS_ABBREV;
2361 Vals.push_back(Flags);
2366 case Instruction::GetElementPtr: {
2367 Code = bitc::FUNC_CODE_INST_GEP;
2368 AbbrevToUse = FUNCTION_INST_GEP_ABBREV;
2369 auto &GEPInst = cast<GetElementPtrInst>(I);
2370 Vals.push_back(GEPInst.isInBounds());
2371 Vals.push_back(VE.getTypeID(GEPInst.getSourceElementType()));
2372 for (unsigned i = 0, e = I.getNumOperands(); i != e; ++i)
2373 pushValueAndType(I.getOperand(i), InstID, Vals);
2376 case Instruction::ExtractValue: {
2377 Code = bitc::FUNC_CODE_INST_EXTRACTVAL;
2378 pushValueAndType(I.getOperand(0), InstID, Vals);
2379 const ExtractValueInst *EVI = cast<ExtractValueInst>(&I);
2380 Vals.append(EVI->idx_begin(), EVI->idx_end());
2383 case Instruction::InsertValue: {
2384 Code = bitc::FUNC_CODE_INST_INSERTVAL;
2385 pushValueAndType(I.getOperand(0), InstID, Vals);
2386 pushValueAndType(I.getOperand(1), InstID, Vals);
2387 const InsertValueInst *IVI = cast<InsertValueInst>(&I);
2388 Vals.append(IVI->idx_begin(), IVI->idx_end());
2391 case Instruction::Select:
2392 Code = bitc::FUNC_CODE_INST_VSELECT;
2393 pushValueAndType(I.getOperand(1), InstID, Vals);
2394 pushValue(I.getOperand(2), InstID, Vals);
2395 pushValueAndType(I.getOperand(0), InstID, Vals);
2397 case Instruction::ExtractElement:
2398 Code = bitc::FUNC_CODE_INST_EXTRACTELT;
2399 pushValueAndType(I.getOperand(0), InstID, Vals);
2400 pushValueAndType(I.getOperand(1), InstID, Vals);
2402 case Instruction::InsertElement:
2403 Code = bitc::FUNC_CODE_INST_INSERTELT;
2404 pushValueAndType(I.getOperand(0), InstID, Vals);
2405 pushValue(I.getOperand(1), InstID, Vals);
2406 pushValueAndType(I.getOperand(2), InstID, Vals);
2408 case Instruction::ShuffleVector:
2409 Code = bitc::FUNC_CODE_INST_SHUFFLEVEC;
2410 pushValueAndType(I.getOperand(0), InstID, Vals);
2411 pushValue(I.getOperand(1), InstID, Vals);
2412 pushValue(I.getOperand(2), InstID, Vals);
2414 case Instruction::ICmp:
2415 case Instruction::FCmp: {
2416 // compare returning Int1Ty or vector of Int1Ty
2417 Code = bitc::FUNC_CODE_INST_CMP2;
2418 pushValueAndType(I.getOperand(0), InstID, Vals);
2419 pushValue(I.getOperand(1), InstID, Vals);
2420 Vals.push_back(cast<CmpInst>(I).getPredicate());
2421 uint64_t Flags = getOptimizationFlags(&I);
2423 Vals.push_back(Flags);
2427 case Instruction::Ret:
2429 Code = bitc::FUNC_CODE_INST_RET;
2430 unsigned NumOperands = I.getNumOperands();
2431 if (NumOperands == 0)
2432 AbbrevToUse = FUNCTION_INST_RET_VOID_ABBREV;
2433 else if (NumOperands == 1) {
2434 if (!pushValueAndType(I.getOperand(0), InstID, Vals))
2435 AbbrevToUse = FUNCTION_INST_RET_VAL_ABBREV;
2437 for (unsigned i = 0, e = NumOperands; i != e; ++i)
2438 pushValueAndType(I.getOperand(i), InstID, Vals);
2442 case Instruction::Br:
2444 Code = bitc::FUNC_CODE_INST_BR;
2445 const BranchInst &II = cast<BranchInst>(I);
2446 Vals.push_back(VE.getValueID(II.getSuccessor(0)));
2447 if (II.isConditional()) {
2448 Vals.push_back(VE.getValueID(II.getSuccessor(1)));
2449 pushValue(II.getCondition(), InstID, Vals);
2453 case Instruction::Switch:
2455 Code = bitc::FUNC_CODE_INST_SWITCH;
2456 const SwitchInst &SI = cast<SwitchInst>(I);
2457 Vals.push_back(VE.getTypeID(SI.getCondition()->getType()));
2458 pushValue(SI.getCondition(), InstID, Vals);
2459 Vals.push_back(VE.getValueID(SI.getDefaultDest()));
2460 for (SwitchInst::ConstCaseIt Case : SI.cases()) {
2461 Vals.push_back(VE.getValueID(Case.getCaseValue()));
2462 Vals.push_back(VE.getValueID(Case.getCaseSuccessor()));
2466 case Instruction::IndirectBr:
2467 Code = bitc::FUNC_CODE_INST_INDIRECTBR;
2468 Vals.push_back(VE.getTypeID(I.getOperand(0)->getType()));
2469 // Encode the address operand as relative, but not the basic blocks.
2470 pushValue(I.getOperand(0), InstID, Vals);
2471 for (unsigned i = 1, e = I.getNumOperands(); i != e; ++i)
2472 Vals.push_back(VE.getValueID(I.getOperand(i)));
2475 case Instruction::Invoke: {
2476 const InvokeInst *II = cast<InvokeInst>(&I);
2477 const Value *Callee = II->getCalledValue();
2478 FunctionType *FTy = II->getFunctionType();
2480 if (II->hasOperandBundles())
2481 writeOperandBundles(II, InstID);
2483 Code = bitc::FUNC_CODE_INST_INVOKE;
2485 Vals.push_back(VE.getAttributeID(II->getAttributes()));
2486 Vals.push_back(II->getCallingConv() | 1 << 13);
2487 Vals.push_back(VE.getValueID(II->getNormalDest()));
2488 Vals.push_back(VE.getValueID(II->getUnwindDest()));
2489 Vals.push_back(VE.getTypeID(FTy));
2490 pushValueAndType(Callee, InstID, Vals);
2492 // Emit value #'s for the fixed parameters.
2493 for (unsigned i = 0, e = FTy->getNumParams(); i != e; ++i)
2494 pushValue(I.getOperand(i), InstID, Vals); // fixed param.
2496 // Emit type/value pairs for varargs params.
2497 if (FTy->isVarArg()) {
2498 for (unsigned i = FTy->getNumParams(), e = I.getNumOperands()-3;
2500 pushValueAndType(I.getOperand(i), InstID, Vals); // vararg
2504 case Instruction::Resume:
2505 Code = bitc::FUNC_CODE_INST_RESUME;
2506 pushValueAndType(I.getOperand(0), InstID, Vals);
2508 case Instruction::CleanupRet: {
2509 Code = bitc::FUNC_CODE_INST_CLEANUPRET;
2510 const auto &CRI = cast<CleanupReturnInst>(I);
2511 pushValue(CRI.getCleanupPad(), InstID, Vals);
2512 if (CRI.hasUnwindDest())
2513 Vals.push_back(VE.getValueID(CRI.getUnwindDest()));
2516 case Instruction::CatchRet: {
2517 Code = bitc::FUNC_CODE_INST_CATCHRET;
2518 const auto &CRI = cast<CatchReturnInst>(I);
2519 pushValue(CRI.getCatchPad(), InstID, Vals);
2520 Vals.push_back(VE.getValueID(CRI.getSuccessor()));
2523 case Instruction::CleanupPad:
2524 case Instruction::CatchPad: {
2525 const auto &FuncletPad = cast<FuncletPadInst>(I);
2526 Code = isa<CatchPadInst>(FuncletPad) ? bitc::FUNC_CODE_INST_CATCHPAD
2527 : bitc::FUNC_CODE_INST_CLEANUPPAD;
2528 pushValue(FuncletPad.getParentPad(), InstID, Vals);
2530 unsigned NumArgOperands = FuncletPad.getNumArgOperands();
2531 Vals.push_back(NumArgOperands);
2532 for (unsigned Op = 0; Op != NumArgOperands; ++Op)
2533 pushValueAndType(FuncletPad.getArgOperand(Op), InstID, Vals);
2536 case Instruction::CatchSwitch: {
2537 Code = bitc::FUNC_CODE_INST_CATCHSWITCH;
2538 const auto &CatchSwitch = cast<CatchSwitchInst>(I);
2540 pushValue(CatchSwitch.getParentPad(), InstID, Vals);
2542 unsigned NumHandlers = CatchSwitch.getNumHandlers();
2543 Vals.push_back(NumHandlers);
2544 for (const BasicBlock *CatchPadBB : CatchSwitch.handlers())
2545 Vals.push_back(VE.getValueID(CatchPadBB));
2547 if (CatchSwitch.hasUnwindDest())
2548 Vals.push_back(VE.getValueID(CatchSwitch.getUnwindDest()));
2551 case Instruction::Unreachable:
2552 Code = bitc::FUNC_CODE_INST_UNREACHABLE;
2553 AbbrevToUse = FUNCTION_INST_UNREACHABLE_ABBREV;
2556 case Instruction::PHI: {
2557 const PHINode &PN = cast<PHINode>(I);
2558 Code = bitc::FUNC_CODE_INST_PHI;
2559 // With the newer instruction encoding, forward references could give
2560 // negative valued IDs. This is most common for PHIs, so we use
2562 SmallVector<uint64_t, 128> Vals64;
2563 Vals64.push_back(VE.getTypeID(PN.getType()));
2564 for (unsigned i = 0, e = PN.getNumIncomingValues(); i != e; ++i) {
2565 pushValueSigned(PN.getIncomingValue(i), InstID, Vals64);
2566 Vals64.push_back(VE.getValueID(PN.getIncomingBlock(i)));
2568 // Emit a Vals64 vector and exit.
2569 Stream.EmitRecord(Code, Vals64, AbbrevToUse);
2574 case Instruction::LandingPad: {
2575 const LandingPadInst &LP = cast<LandingPadInst>(I);
2576 Code = bitc::FUNC_CODE_INST_LANDINGPAD;
2577 Vals.push_back(VE.getTypeID(LP.getType()));
2578 Vals.push_back(LP.isCleanup());
2579 Vals.push_back(LP.getNumClauses());
2580 for (unsigned I = 0, E = LP.getNumClauses(); I != E; ++I) {
2582 Vals.push_back(LandingPadInst::Catch);
2584 Vals.push_back(LandingPadInst::Filter);
2585 pushValueAndType(LP.getClause(I), InstID, Vals);
2590 case Instruction::Alloca: {
2591 Code = bitc::FUNC_CODE_INST_ALLOCA;
2592 const AllocaInst &AI = cast<AllocaInst>(I);
2593 Vals.push_back(VE.getTypeID(AI.getAllocatedType()));
2594 Vals.push_back(VE.getTypeID(I.getOperand(0)->getType()));
2595 Vals.push_back(VE.getValueID(I.getOperand(0))); // size.
2596 unsigned AlignRecord = Log2_32(AI.getAlignment()) + 1;
2597 assert(Log2_32(Value::MaximumAlignment) + 1 < 1 << 5 &&
2598 "not enough bits for maximum alignment");
2599 assert(AlignRecord < 1 << 5 && "alignment greater than 1 << 64");
2600 AlignRecord |= AI.isUsedWithInAlloca() << 5;
2601 AlignRecord |= 1 << 6;
2602 AlignRecord |= AI.isSwiftError() << 7;
2603 Vals.push_back(AlignRecord);
2607 case Instruction::Load:
2608 if (cast<LoadInst>(I).isAtomic()) {
2609 Code = bitc::FUNC_CODE_INST_LOADATOMIC;
2610 pushValueAndType(I.getOperand(0), InstID, Vals);
2612 Code = bitc::FUNC_CODE_INST_LOAD;
2613 if (!pushValueAndType(I.getOperand(0), InstID, Vals)) // ptr
2614 AbbrevToUse = FUNCTION_INST_LOAD_ABBREV;
2616 Vals.push_back(VE.getTypeID(I.getType()));
2617 Vals.push_back(Log2_32(cast<LoadInst>(I).getAlignment())+1);
2618 Vals.push_back(cast<LoadInst>(I).isVolatile());
2619 if (cast<LoadInst>(I).isAtomic()) {
2620 Vals.push_back(getEncodedOrdering(cast<LoadInst>(I).getOrdering()));
2621 Vals.push_back(getEncodedSynchScope(cast<LoadInst>(I).getSynchScope()));
2624 case Instruction::Store:
2625 if (cast<StoreInst>(I).isAtomic())
2626 Code = bitc::FUNC_CODE_INST_STOREATOMIC;
2628 Code = bitc::FUNC_CODE_INST_STORE;
2629 pushValueAndType(I.getOperand(1), InstID, Vals); // ptrty + ptr
2630 pushValueAndType(I.getOperand(0), InstID, Vals); // valty + val
2631 Vals.push_back(Log2_32(cast<StoreInst>(I).getAlignment())+1);
2632 Vals.push_back(cast<StoreInst>(I).isVolatile());
2633 if (cast<StoreInst>(I).isAtomic()) {
2634 Vals.push_back(getEncodedOrdering(cast<StoreInst>(I).getOrdering()));
2635 Vals.push_back(getEncodedSynchScope(cast<StoreInst>(I).getSynchScope()));
2638 case Instruction::AtomicCmpXchg:
2639 Code = bitc::FUNC_CODE_INST_CMPXCHG;
2640 pushValueAndType(I.getOperand(0), InstID, Vals); // ptrty + ptr
2641 pushValueAndType(I.getOperand(1), InstID, Vals); // cmp.
2642 pushValue(I.getOperand(2), InstID, Vals); // newval.
2643 Vals.push_back(cast<AtomicCmpXchgInst>(I).isVolatile());
2645 getEncodedOrdering(cast<AtomicCmpXchgInst>(I).getSuccessOrdering()));
2647 getEncodedSynchScope(cast<AtomicCmpXchgInst>(I).getSynchScope()));
2649 getEncodedOrdering(cast<AtomicCmpXchgInst>(I).getFailureOrdering()));
2650 Vals.push_back(cast<AtomicCmpXchgInst>(I).isWeak());
2652 case Instruction::AtomicRMW:
2653 Code = bitc::FUNC_CODE_INST_ATOMICRMW;
2654 pushValueAndType(I.getOperand(0), InstID, Vals); // ptrty + ptr
2655 pushValue(I.getOperand(1), InstID, Vals); // val.
2657 getEncodedRMWOperation(cast<AtomicRMWInst>(I).getOperation()));
2658 Vals.push_back(cast<AtomicRMWInst>(I).isVolatile());
2659 Vals.push_back(getEncodedOrdering(cast<AtomicRMWInst>(I).getOrdering()));
2661 getEncodedSynchScope(cast<AtomicRMWInst>(I).getSynchScope()));
2663 case Instruction::Fence:
2664 Code = bitc::FUNC_CODE_INST_FENCE;
2665 Vals.push_back(getEncodedOrdering(cast<FenceInst>(I).getOrdering()));
2666 Vals.push_back(getEncodedSynchScope(cast<FenceInst>(I).getSynchScope()));
2668 case Instruction::Call: {
2669 const CallInst &CI = cast<CallInst>(I);
2670 FunctionType *FTy = CI.getFunctionType();
2672 if (CI.hasOperandBundles())
2673 writeOperandBundles(&CI, InstID);
2675 Code = bitc::FUNC_CODE_INST_CALL;
2677 Vals.push_back(VE.getAttributeID(CI.getAttributes()));
2679 unsigned Flags = getOptimizationFlags(&I);
2680 Vals.push_back(CI.getCallingConv() << bitc::CALL_CCONV |
2681 unsigned(CI.isTailCall()) << bitc::CALL_TAIL |
2682 unsigned(CI.isMustTailCall()) << bitc::CALL_MUSTTAIL |
2683 1 << bitc::CALL_EXPLICIT_TYPE |
2684 unsigned(CI.isNoTailCall()) << bitc::CALL_NOTAIL |
2685 unsigned(Flags != 0) << bitc::CALL_FMF);
2687 Vals.push_back(Flags);
2689 Vals.push_back(VE.getTypeID(FTy));
2690 pushValueAndType(CI.getCalledValue(), InstID, Vals); // Callee
2692 // Emit value #'s for the fixed parameters.
2693 for (unsigned i = 0, e = FTy->getNumParams(); i != e; ++i) {
2694 // Check for labels (can happen with asm labels).
2695 if (FTy->getParamType(i)->isLabelTy())
2696 Vals.push_back(VE.getValueID(CI.getArgOperand(i)));
2698 pushValue(CI.getArgOperand(i), InstID, Vals); // fixed param.
2701 // Emit type/value pairs for varargs params.
2702 if (FTy->isVarArg()) {
2703 for (unsigned i = FTy->getNumParams(), e = CI.getNumArgOperands();
2705 pushValueAndType(CI.getArgOperand(i), InstID, Vals); // varargs
2709 case Instruction::VAArg:
2710 Code = bitc::FUNC_CODE_INST_VAARG;
2711 Vals.push_back(VE.getTypeID(I.getOperand(0)->getType())); // valistty
2712 pushValue(I.getOperand(0), InstID, Vals); // valist.
2713 Vals.push_back(VE.getTypeID(I.getType())); // restype.
2717 Stream.EmitRecord(Code, Vals, AbbrevToUse);
2721 /// Emit names for globals/functions etc. \p IsModuleLevel is true when
2722 /// we are writing the module-level VST, where we are including a function
2723 /// bitcode index and need to backpatch the VST forward declaration record.
2724 void ModuleBitcodeWriter::writeValueSymbolTable(
2725 const ValueSymbolTable &VST, bool IsModuleLevel,
2726 DenseMap<const Function *, uint64_t> *FunctionToBitcodeIndex) {
2728 // writeValueSymbolTableForwardDecl should have returned early as
2729 // well. Ensure this handling remains in sync by asserting that
2730 // the placeholder offset is not set.
2731 assert(!IsModuleLevel || !hasVSTOffsetPlaceholder());
2735 if (IsModuleLevel && hasVSTOffsetPlaceholder()) {
2736 // Get the offset of the VST we are writing, and backpatch it into
2737 // the VST forward declaration record.
2738 uint64_t VSTOffset = Stream.GetCurrentBitNo();
2739 // The BitcodeStartBit was the stream offset of the actual bitcode
2740 // (e.g. excluding any initial darwin header).
2741 VSTOffset -= bitcodeStartBit();
2742 assert((VSTOffset & 31) == 0 && "VST block not 32-bit aligned");
2743 Stream.BackpatchWord(VSTOffsetPlaceholder, VSTOffset / 32);
2746 Stream.EnterSubblock(bitc::VALUE_SYMTAB_BLOCK_ID, 4);
2748 // For the module-level VST, add abbrev Ids for the VST_CODE_FNENTRY
2749 // records, which are not used in the per-function VSTs.
2750 unsigned FnEntry8BitAbbrev;
2751 unsigned FnEntry7BitAbbrev;
2752 unsigned FnEntry6BitAbbrev;
2753 unsigned GUIDEntryAbbrev;
2754 if (IsModuleLevel && hasVSTOffsetPlaceholder()) {
2755 // 8-bit fixed-width VST_CODE_FNENTRY function strings.
2756 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
2757 Abbv->Add(BitCodeAbbrevOp(bitc::VST_CODE_FNENTRY));
2758 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8)); // value id
2759 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8)); // funcoffset
2760 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
2761 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 8));
2762 FnEntry8BitAbbrev = Stream.EmitAbbrev(Abbv);
2764 // 7-bit fixed width VST_CODE_FNENTRY function strings.
2765 Abbv = new BitCodeAbbrev();
2766 Abbv->Add(BitCodeAbbrevOp(bitc::VST_CODE_FNENTRY));
2767 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8)); // value id
2768 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8)); // funcoffset
2769 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
2770 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 7));
2771 FnEntry7BitAbbrev = Stream.EmitAbbrev(Abbv);
2773 // 6-bit char6 VST_CODE_FNENTRY function strings.
2774 Abbv = new BitCodeAbbrev();
2775 Abbv->Add(BitCodeAbbrevOp(bitc::VST_CODE_FNENTRY));
2776 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8)); // value id
2777 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8)); // funcoffset
2778 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
2779 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Char6));
2780 FnEntry6BitAbbrev = Stream.EmitAbbrev(Abbv);
2782 // FIXME: Change the name of this record as it is now used by
2783 // the per-module index as well.
2784 Abbv = new BitCodeAbbrev();
2785 Abbv->Add(BitCodeAbbrevOp(bitc::VST_CODE_COMBINED_ENTRY));
2786 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8)); // valueid
2787 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8)); // refguid
2788 GUIDEntryAbbrev = Stream.EmitAbbrev(Abbv);
2791 // FIXME: Set up the abbrev, we know how many values there are!
2792 // FIXME: We know if the type names can use 7-bit ascii.
2793 SmallVector<uint64_t, 64> NameVals;
2795 for (const ValueName &Name : VST) {
2796 // Figure out the encoding to use for the name.
2797 StringEncoding Bits =
2798 getStringEncoding(Name.getKeyData(), Name.getKeyLength());
2800 unsigned AbbrevToUse = VST_ENTRY_8_ABBREV;
2801 NameVals.push_back(VE.getValueID(Name.getValue()));
2803 Function *F = dyn_cast<Function>(Name.getValue());
2805 // If value is an alias, need to get the aliased base object to
2806 // see if it is a function.
2807 auto *GA = dyn_cast<GlobalAlias>(Name.getValue());
2808 if (GA && GA->getBaseObject())
2809 F = dyn_cast<Function>(GA->getBaseObject());
2812 // VST_CODE_ENTRY: [valueid, namechar x N]
2813 // VST_CODE_FNENTRY: [valueid, funcoffset, namechar x N]
2814 // VST_CODE_BBENTRY: [bbid, namechar x N]
2816 if (isa<BasicBlock>(Name.getValue())) {
2817 Code = bitc::VST_CODE_BBENTRY;
2818 if (Bits == SE_Char6)
2819 AbbrevToUse = VST_BBENTRY_6_ABBREV;
2820 } else if (F && !F->isDeclaration()) {
2821 // Must be the module-level VST, where we pass in the Index and
2822 // have a VSTOffsetPlaceholder. The function-level VST should not
2823 // contain any Function symbols.
2824 assert(FunctionToBitcodeIndex);
2825 assert(hasVSTOffsetPlaceholder());
2827 // Save the word offset of the function (from the start of the
2828 // actual bitcode written to the stream).
2829 uint64_t BitcodeIndex = (*FunctionToBitcodeIndex)[F] - bitcodeStartBit();
2830 assert((BitcodeIndex & 31) == 0 && "function block not 32-bit aligned");
2831 NameVals.push_back(BitcodeIndex / 32);
2833 Code = bitc::VST_CODE_FNENTRY;
2834 AbbrevToUse = FnEntry8BitAbbrev;
2835 if (Bits == SE_Char6)
2836 AbbrevToUse = FnEntry6BitAbbrev;
2837 else if (Bits == SE_Fixed7)
2838 AbbrevToUse = FnEntry7BitAbbrev;
2840 Code = bitc::VST_CODE_ENTRY;
2841 if (Bits == SE_Char6)
2842 AbbrevToUse = VST_ENTRY_6_ABBREV;
2843 else if (Bits == SE_Fixed7)
2844 AbbrevToUse = VST_ENTRY_7_ABBREV;
2847 for (const auto P : Name.getKey())
2848 NameVals.push_back((unsigned char)P);
2850 // Emit the finished record.
2851 Stream.EmitRecord(Code, NameVals, AbbrevToUse);
2854 // Emit any GUID valueIDs created for indirect call edges into the
2855 // module-level VST.
2856 if (IsModuleLevel && hasVSTOffsetPlaceholder())
2857 for (const auto &GI : valueIds()) {
2858 NameVals.push_back(GI.second);
2859 NameVals.push_back(GI.first);
2860 Stream.EmitRecord(bitc::VST_CODE_COMBINED_ENTRY, NameVals,
2867 /// Emit function names and summary offsets for the combined index
2868 /// used by ThinLTO.
2869 void IndexBitcodeWriter::writeCombinedValueSymbolTable() {
2870 assert(hasVSTOffsetPlaceholder() && "Expected non-zero VSTOffsetPlaceholder");
2871 // Get the offset of the VST we are writing, and backpatch it into
2872 // the VST forward declaration record.
2873 uint64_t VSTOffset = Stream.GetCurrentBitNo();
2874 assert((VSTOffset & 31) == 0 && "VST block not 32-bit aligned");
2875 Stream.BackpatchWord(VSTOffsetPlaceholder, VSTOffset / 32);
2877 Stream.EnterSubblock(bitc::VALUE_SYMTAB_BLOCK_ID, 4);
2879 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
2880 Abbv->Add(BitCodeAbbrevOp(bitc::VST_CODE_COMBINED_ENTRY));
2881 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8)); // valueid
2882 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8)); // refguid
2883 unsigned EntryAbbrev = Stream.EmitAbbrev(Abbv);
2885 SmallVector<uint64_t, 64> NameVals;
2886 for (const auto &GVI : valueIds()) {
2887 // VST_CODE_COMBINED_ENTRY: [valueid, refguid]
2888 NameVals.push_back(GVI.second);
2889 NameVals.push_back(GVI.first);
2891 // Emit the finished record.
2892 Stream.EmitRecord(bitc::VST_CODE_COMBINED_ENTRY, NameVals, EntryAbbrev);
2898 void ModuleBitcodeWriter::writeUseList(UseListOrder &&Order) {
2899 assert(Order.Shuffle.size() >= 2 && "Shuffle too small");
2901 if (isa<BasicBlock>(Order.V))
2902 Code = bitc::USELIST_CODE_BB;
2904 Code = bitc::USELIST_CODE_DEFAULT;
2906 SmallVector<uint64_t, 64> Record(Order.Shuffle.begin(), Order.Shuffle.end());
2907 Record.push_back(VE.getValueID(Order.V));
2908 Stream.EmitRecord(Code, Record);
2911 void ModuleBitcodeWriter::writeUseListBlock(const Function *F) {
2912 assert(VE.shouldPreserveUseListOrder() &&
2913 "Expected to be preserving use-list order");
2915 auto hasMore = [&]() {
2916 return !VE.UseListOrders.empty() && VE.UseListOrders.back().F == F;
2922 Stream.EnterSubblock(bitc::USELIST_BLOCK_ID, 3);
2924 writeUseList(std::move(VE.UseListOrders.back()));
2925 VE.UseListOrders.pop_back();
2930 /// Emit a function body to the module stream.
2931 void ModuleBitcodeWriter::writeFunction(
2933 DenseMap<const Function *, uint64_t> &FunctionToBitcodeIndex) {
2934 // Save the bitcode index of the start of this function block for recording
2936 FunctionToBitcodeIndex[&F] = Stream.GetCurrentBitNo();
2938 Stream.EnterSubblock(bitc::FUNCTION_BLOCK_ID, 4);
2939 VE.incorporateFunction(F);
2941 SmallVector<unsigned, 64> Vals;
2943 // Emit the number of basic blocks, so the reader can create them ahead of
2945 Vals.push_back(VE.getBasicBlocks().size());
2946 Stream.EmitRecord(bitc::FUNC_CODE_DECLAREBLOCKS, Vals);
2949 // If there are function-local constants, emit them now.
2950 unsigned CstStart, CstEnd;
2951 VE.getFunctionConstantRange(CstStart, CstEnd);
2952 writeConstants(CstStart, CstEnd, false);
2954 // If there is function-local metadata, emit it now.
2955 writeFunctionMetadata(F);
2957 // Keep a running idea of what the instruction ID is.
2958 unsigned InstID = CstEnd;
2960 bool NeedsMetadataAttachment = F.hasMetadata();
2962 DILocation *LastDL = nullptr;
2963 // Finally, emit all the instructions, in order.
2964 for (Function::const_iterator BB = F.begin(), E = F.end(); BB != E; ++BB)
2965 for (BasicBlock::const_iterator I = BB->begin(), E = BB->end();
2967 writeInstruction(*I, InstID, Vals);
2969 if (!I->getType()->isVoidTy())
2972 // If the instruction has metadata, write a metadata attachment later.
2973 NeedsMetadataAttachment |= I->hasMetadataOtherThanDebugLoc();
2975 // If the instruction has a debug location, emit it.
2976 DILocation *DL = I->getDebugLoc();
2981 // Just repeat the same debug loc as last time.
2982 Stream.EmitRecord(bitc::FUNC_CODE_DEBUG_LOC_AGAIN, Vals);
2986 Vals.push_back(DL->getLine());
2987 Vals.push_back(DL->getColumn());
2988 Vals.push_back(VE.getMetadataOrNullID(DL->getScope()));
2989 Vals.push_back(VE.getMetadataOrNullID(DL->getInlinedAt()));
2990 Stream.EmitRecord(bitc::FUNC_CODE_DEBUG_LOC, Vals);
2996 // Emit names for all the instructions etc.
2997 writeValueSymbolTable(F.getValueSymbolTable());
2999 if (NeedsMetadataAttachment)
3000 writeFunctionMetadataAttachment(F);
3001 if (VE.shouldPreserveUseListOrder())
3002 writeUseListBlock(&F);
3007 // Emit blockinfo, which defines the standard abbreviations etc.
3008 void ModuleBitcodeWriter::writeBlockInfo() {
3009 // We only want to emit block info records for blocks that have multiple
3010 // instances: CONSTANTS_BLOCK, FUNCTION_BLOCK and VALUE_SYMTAB_BLOCK.
3011 // Other blocks can define their abbrevs inline.
3012 Stream.EnterBlockInfoBlock(2);
3014 { // 8-bit fixed-width VST_CODE_ENTRY/VST_CODE_BBENTRY strings.
3015 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
3016 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 3));
3017 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8));
3018 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
3019 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 8));
3020 if (Stream.EmitBlockInfoAbbrev(bitc::VALUE_SYMTAB_BLOCK_ID, Abbv) !=
3022 llvm_unreachable("Unexpected abbrev ordering!");
3025 { // 7-bit fixed width VST_CODE_ENTRY strings.
3026 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
3027 Abbv->Add(BitCodeAbbrevOp(bitc::VST_CODE_ENTRY));
3028 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8));
3029 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
3030 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 7));
3031 if (Stream.EmitBlockInfoAbbrev(bitc::VALUE_SYMTAB_BLOCK_ID, Abbv) !=
3033 llvm_unreachable("Unexpected abbrev ordering!");
3035 { // 6-bit char6 VST_CODE_ENTRY strings.
3036 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
3037 Abbv->Add(BitCodeAbbrevOp(bitc::VST_CODE_ENTRY));
3038 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8));
3039 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
3040 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Char6));
3041 if (Stream.EmitBlockInfoAbbrev(bitc::VALUE_SYMTAB_BLOCK_ID, Abbv) !=
3043 llvm_unreachable("Unexpected abbrev ordering!");
3045 { // 6-bit char6 VST_CODE_BBENTRY strings.
3046 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
3047 Abbv->Add(BitCodeAbbrevOp(bitc::VST_CODE_BBENTRY));
3048 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8));
3049 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
3050 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Char6));
3051 if (Stream.EmitBlockInfoAbbrev(bitc::VALUE_SYMTAB_BLOCK_ID, Abbv) !=
3052 VST_BBENTRY_6_ABBREV)
3053 llvm_unreachable("Unexpected abbrev ordering!");
3058 { // SETTYPE abbrev for CONSTANTS_BLOCK.
3059 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
3060 Abbv->Add(BitCodeAbbrevOp(bitc::CST_CODE_SETTYPE));
3061 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed,
3062 VE.computeBitsRequiredForTypeIndicies()));
3063 if (Stream.EmitBlockInfoAbbrev(bitc::CONSTANTS_BLOCK_ID, Abbv) !=
3064 CONSTANTS_SETTYPE_ABBREV)
3065 llvm_unreachable("Unexpected abbrev ordering!");
3068 { // INTEGER abbrev for CONSTANTS_BLOCK.
3069 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
3070 Abbv->Add(BitCodeAbbrevOp(bitc::CST_CODE_INTEGER));
3071 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8));
3072 if (Stream.EmitBlockInfoAbbrev(bitc::CONSTANTS_BLOCK_ID, Abbv) !=
3073 CONSTANTS_INTEGER_ABBREV)
3074 llvm_unreachable("Unexpected abbrev ordering!");
3077 { // CE_CAST abbrev for CONSTANTS_BLOCK.
3078 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
3079 Abbv->Add(BitCodeAbbrevOp(bitc::CST_CODE_CE_CAST));
3080 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 4)); // cast opc
3081 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, // typeid
3082 VE.computeBitsRequiredForTypeIndicies()));
3083 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8)); // value id
3085 if (Stream.EmitBlockInfoAbbrev(bitc::CONSTANTS_BLOCK_ID, Abbv) !=
3086 CONSTANTS_CE_CAST_Abbrev)
3087 llvm_unreachable("Unexpected abbrev ordering!");
3089 { // NULL abbrev for CONSTANTS_BLOCK.
3090 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
3091 Abbv->Add(BitCodeAbbrevOp(bitc::CST_CODE_NULL));
3092 if (Stream.EmitBlockInfoAbbrev(bitc::CONSTANTS_BLOCK_ID, Abbv) !=
3093 CONSTANTS_NULL_Abbrev)
3094 llvm_unreachable("Unexpected abbrev ordering!");
3097 // FIXME: This should only use space for first class types!
3099 { // INST_LOAD abbrev for FUNCTION_BLOCK.
3100 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
3101 Abbv->Add(BitCodeAbbrevOp(bitc::FUNC_CODE_INST_LOAD));
3102 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Ptr
3103 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, // dest ty
3104 VE.computeBitsRequiredForTypeIndicies()));
3105 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 4)); // Align
3106 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // volatile
3107 if (Stream.EmitBlockInfoAbbrev(bitc::FUNCTION_BLOCK_ID, Abbv) !=
3108 FUNCTION_INST_LOAD_ABBREV)
3109 llvm_unreachable("Unexpected abbrev ordering!");
3111 { // INST_BINOP abbrev for FUNCTION_BLOCK.
3112 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
3113 Abbv->Add(BitCodeAbbrevOp(bitc::FUNC_CODE_INST_BINOP));
3114 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // LHS
3115 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // RHS
3116 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 4)); // opc
3117 if (Stream.EmitBlockInfoAbbrev(bitc::FUNCTION_BLOCK_ID, Abbv) !=
3118 FUNCTION_INST_BINOP_ABBREV)
3119 llvm_unreachable("Unexpected abbrev ordering!");
3121 { // INST_BINOP_FLAGS abbrev for FUNCTION_BLOCK.
3122 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
3123 Abbv->Add(BitCodeAbbrevOp(bitc::FUNC_CODE_INST_BINOP));
3124 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // LHS
3125 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // RHS
3126 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 4)); // opc
3127 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 7)); // flags
3128 if (Stream.EmitBlockInfoAbbrev(bitc::FUNCTION_BLOCK_ID, Abbv) !=
3129 FUNCTION_INST_BINOP_FLAGS_ABBREV)
3130 llvm_unreachable("Unexpected abbrev ordering!");
3132 { // INST_CAST abbrev for FUNCTION_BLOCK.
3133 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
3134 Abbv->Add(BitCodeAbbrevOp(bitc::FUNC_CODE_INST_CAST));
3135 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // OpVal
3136 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, // dest ty
3137 VE.computeBitsRequiredForTypeIndicies()));
3138 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 4)); // opc
3139 if (Stream.EmitBlockInfoAbbrev(bitc::FUNCTION_BLOCK_ID, Abbv) !=
3140 FUNCTION_INST_CAST_ABBREV)
3141 llvm_unreachable("Unexpected abbrev ordering!");
3144 { // INST_RET abbrev for FUNCTION_BLOCK.
3145 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
3146 Abbv->Add(BitCodeAbbrevOp(bitc::FUNC_CODE_INST_RET));
3147 if (Stream.EmitBlockInfoAbbrev(bitc::FUNCTION_BLOCK_ID, Abbv) !=
3148 FUNCTION_INST_RET_VOID_ABBREV)
3149 llvm_unreachable("Unexpected abbrev ordering!");
3151 { // INST_RET abbrev for FUNCTION_BLOCK.
3152 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
3153 Abbv->Add(BitCodeAbbrevOp(bitc::FUNC_CODE_INST_RET));
3154 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // ValID
3155 if (Stream.EmitBlockInfoAbbrev(bitc::FUNCTION_BLOCK_ID, Abbv) !=
3156 FUNCTION_INST_RET_VAL_ABBREV)
3157 llvm_unreachable("Unexpected abbrev ordering!");
3159 { // INST_UNREACHABLE abbrev for FUNCTION_BLOCK.
3160 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
3161 Abbv->Add(BitCodeAbbrevOp(bitc::FUNC_CODE_INST_UNREACHABLE));
3162 if (Stream.EmitBlockInfoAbbrev(bitc::FUNCTION_BLOCK_ID, Abbv) !=
3163 FUNCTION_INST_UNREACHABLE_ABBREV)
3164 llvm_unreachable("Unexpected abbrev ordering!");
3167 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
3168 Abbv->Add(BitCodeAbbrevOp(bitc::FUNC_CODE_INST_GEP));
3169 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1));
3170 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, // dest ty
3171 Log2_32_Ceil(VE.getTypes().size() + 1)));
3172 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
3173 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));
3174 if (Stream.EmitBlockInfoAbbrev(bitc::FUNCTION_BLOCK_ID, Abbv) !=
3175 FUNCTION_INST_GEP_ABBREV)
3176 llvm_unreachable("Unexpected abbrev ordering!");
3182 /// Write the module path strings, currently only used when generating
3183 /// a combined index file.
3184 void IndexBitcodeWriter::writeModStrings() {
3185 Stream.EnterSubblock(bitc::MODULE_STRTAB_BLOCK_ID, 3);
3187 // TODO: See which abbrev sizes we actually need to emit
3189 // 8-bit fixed-width MST_ENTRY strings.
3190 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
3191 Abbv->Add(BitCodeAbbrevOp(bitc::MST_CODE_ENTRY));
3192 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8));
3193 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
3194 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 8));
3195 unsigned Abbrev8Bit = Stream.EmitAbbrev(Abbv);
3197 // 7-bit fixed width MST_ENTRY strings.
3198 Abbv = new BitCodeAbbrev();
3199 Abbv->Add(BitCodeAbbrevOp(bitc::MST_CODE_ENTRY));
3200 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8));
3201 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
3202 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 7));
3203 unsigned Abbrev7Bit = Stream.EmitAbbrev(Abbv);
3205 // 6-bit char6 MST_ENTRY strings.
3206 Abbv = new BitCodeAbbrev();
3207 Abbv->Add(BitCodeAbbrevOp(bitc::MST_CODE_ENTRY));
3208 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8));
3209 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
3210 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Char6));
3211 unsigned Abbrev6Bit = Stream.EmitAbbrev(Abbv);
3213 // Module Hash, 160 bits SHA1. Optionally, emitted after each MST_CODE_ENTRY.
3214 Abbv = new BitCodeAbbrev();
3215 Abbv->Add(BitCodeAbbrevOp(bitc::MST_CODE_HASH));
3216 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 32));
3217 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 32));
3218 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 32));
3219 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 32));
3220 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 32));
3221 unsigned AbbrevHash = Stream.EmitAbbrev(Abbv);
3223 SmallVector<unsigned, 64> Vals;
3224 for (const auto &MPSE : Index.modulePaths()) {
3225 if (!doIncludeModule(MPSE.getKey()))
3227 StringEncoding Bits =
3228 getStringEncoding(MPSE.getKey().data(), MPSE.getKey().size());
3229 unsigned AbbrevToUse = Abbrev8Bit;
3230 if (Bits == SE_Char6)
3231 AbbrevToUse = Abbrev6Bit;
3232 else if (Bits == SE_Fixed7)
3233 AbbrevToUse = Abbrev7Bit;
3235 Vals.push_back(MPSE.getValue().first);
3237 for (const auto P : MPSE.getKey())
3238 Vals.push_back((unsigned char)P);
3240 // Emit the finished record.
3241 Stream.EmitRecord(bitc::MST_CODE_ENTRY, Vals, AbbrevToUse);
3244 // Emit an optional hash for the module now
3245 auto &Hash = MPSE.getValue().second;
3246 bool AllZero = true; // Detect if the hash is empty, and do not generate it
3247 for (auto Val : Hash) {
3250 Vals.push_back(Val);
3253 // Emit the hash record.
3254 Stream.EmitRecord(bitc::MST_CODE_HASH, Vals, AbbrevHash);
3262 // Helper to emit a single function summary record.
3263 void ModuleBitcodeWriter::writePerModuleFunctionSummaryRecord(
3264 SmallVector<uint64_t, 64> &NameVals, GlobalValueSummary *Summary,
3265 unsigned ValueID, unsigned FSCallsAbbrev, unsigned FSCallsProfileAbbrev,
3266 const Function &F) {
3267 NameVals.push_back(ValueID);
3269 FunctionSummary *FS = cast<FunctionSummary>(Summary);
3270 NameVals.push_back(getEncodedGVSummaryFlags(FS->flags()));
3271 NameVals.push_back(FS->instCount());
3272 NameVals.push_back(FS->refs().size());
3274 unsigned SizeBeforeRefs = NameVals.size();
3275 for (auto &RI : FS->refs())
3276 NameVals.push_back(VE.getValueID(RI.getValue()));
3277 // Sort the refs for determinism output, the vector returned by FS->refs() has
3278 // been initialized from a DenseSet.
3279 std::sort(NameVals.begin() + SizeBeforeRefs, NameVals.end());
3281 std::vector<FunctionSummary::EdgeTy> Calls = FS->calls();
3282 std::sort(Calls.begin(), Calls.end(),
3283 [this](const FunctionSummary::EdgeTy &L,
3284 const FunctionSummary::EdgeTy &R) {
3285 return getValueId(L.first) < getValueId(R.first);
3287 bool HasProfileData = F.getEntryCount().hasValue();
3288 for (auto &ECI : Calls) {
3289 NameVals.push_back(getValueId(ECI.first));
3290 assert(ECI.second.CallsiteCount > 0 && "Expected at least one callsite");
3291 NameVals.push_back(ECI.second.CallsiteCount);
3293 NameVals.push_back(ECI.second.ProfileCount);
3296 unsigned FSAbbrev = (HasProfileData ? FSCallsProfileAbbrev : FSCallsAbbrev);
3298 (HasProfileData ? bitc::FS_PERMODULE_PROFILE : bitc::FS_PERMODULE);
3300 // Emit the finished record.
3301 Stream.EmitRecord(Code, NameVals, FSAbbrev);
3305 // Collect the global value references in the given variable's initializer,
3306 // and emit them in a summary record.
3307 void ModuleBitcodeWriter::writeModuleLevelReferences(
3308 const GlobalVariable &V, SmallVector<uint64_t, 64> &NameVals,
3309 unsigned FSModRefsAbbrev) {
3310 // Only interested in recording variable defs in the summary.
3311 if (V.isDeclaration())
3313 NameVals.push_back(VE.getValueID(&V));
3314 NameVals.push_back(getEncodedGVSummaryFlags(V));
3315 auto *Summary = Index->getGlobalValueSummary(V);
3316 GlobalVarSummary *VS = cast<GlobalVarSummary>(Summary);
3318 unsigned SizeBeforeRefs = NameVals.size();
3319 for (auto &RI : VS->refs())
3320 NameVals.push_back(VE.getValueID(RI.getValue()));
3321 // Sort the refs for determinism output, the vector returned by FS->refs() has
3322 // been initialized from a DenseSet.
3323 std::sort(NameVals.begin() + SizeBeforeRefs, NameVals.end());
3325 Stream.EmitRecord(bitc::FS_PERMODULE_GLOBALVAR_INIT_REFS, NameVals,
3330 // Current version for the summary.
3331 // This is bumped whenever we introduce changes in the way some record are
3332 // interpreted, like flags for instance.
3333 static const uint64_t INDEX_VERSION = 1;
3335 /// Emit the per-module summary section alongside the rest of
3336 /// the module's bitcode.
3337 void ModuleBitcodeWriter::writePerModuleGlobalValueSummary() {
3338 if (Index->begin() == Index->end())
3341 Stream.EnterSubblock(bitc::GLOBALVAL_SUMMARY_BLOCK_ID, 4);
3343 Stream.EmitRecord(bitc::FS_VERSION, ArrayRef<uint64_t>{INDEX_VERSION});
3345 // Abbrev for FS_PERMODULE.
3346 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
3347 Abbv->Add(BitCodeAbbrevOp(bitc::FS_PERMODULE));
3348 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8)); // valueid
3349 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // flags
3350 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8)); // instcount
3351 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 4)); // numrefs
3352 // numrefs x valueid, n x (valueid, callsitecount)
3353 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
3354 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8));
3355 unsigned FSCallsAbbrev = Stream.EmitAbbrev(Abbv);
3357 // Abbrev for FS_PERMODULE_PROFILE.
3358 Abbv = new BitCodeAbbrev();
3359 Abbv->Add(BitCodeAbbrevOp(bitc::FS_PERMODULE_PROFILE));
3360 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8)); // valueid
3361 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // flags
3362 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8)); // instcount
3363 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 4)); // numrefs
3364 // numrefs x valueid, n x (valueid, callsitecount, profilecount)
3365 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
3366 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8));
3367 unsigned FSCallsProfileAbbrev = Stream.EmitAbbrev(Abbv);
3369 // Abbrev for FS_PERMODULE_GLOBALVAR_INIT_REFS.
3370 Abbv = new BitCodeAbbrev();
3371 Abbv->Add(BitCodeAbbrevOp(bitc::FS_PERMODULE_GLOBALVAR_INIT_REFS));
3372 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8)); // valueid
3373 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // flags
3374 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array)); // valueids
3375 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8));
3376 unsigned FSModRefsAbbrev = Stream.EmitAbbrev(Abbv);
3378 // Abbrev for FS_ALIAS.
3379 Abbv = new BitCodeAbbrev();
3380 Abbv->Add(BitCodeAbbrevOp(bitc::FS_ALIAS));
3381 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8)); // valueid
3382 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // flags
3383 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8)); // valueid
3384 unsigned FSAliasAbbrev = Stream.EmitAbbrev(Abbv);
3386 SmallVector<uint64_t, 64> NameVals;
3387 // Iterate over the list of functions instead of the Index to
3388 // ensure the ordering is stable.
3389 for (const Function &F : M) {
3390 if (F.isDeclaration())
3392 // Summary emission does not support anonymous functions, they have to
3393 // renamed using the anonymous function renaming pass.
3395 report_fatal_error("Unexpected anonymous function when writing summary");
3397 auto *Summary = Index->getGlobalValueSummary(F);
3398 writePerModuleFunctionSummaryRecord(NameVals, Summary, VE.getValueID(&F),
3399 FSCallsAbbrev, FSCallsProfileAbbrev, F);
3402 // Capture references from GlobalVariable initializers, which are outside
3403 // of a function scope.
3404 for (const GlobalVariable &G : M.globals())
3405 writeModuleLevelReferences(G, NameVals, FSModRefsAbbrev);
3407 for (const GlobalAlias &A : M.aliases()) {
3408 auto *Aliasee = A.getBaseObject();
3409 if (!Aliasee->hasName())
3410 // Nameless function don't have an entry in the summary, skip it.
3412 auto AliasId = VE.getValueID(&A);
3413 auto AliaseeId = VE.getValueID(Aliasee);
3414 NameVals.push_back(AliasId);
3415 NameVals.push_back(getEncodedGVSummaryFlags(A));
3416 NameVals.push_back(AliaseeId);
3417 Stream.EmitRecord(bitc::FS_ALIAS, NameVals, FSAliasAbbrev);
3424 /// Emit the combined summary section into the combined index file.
3425 void IndexBitcodeWriter::writeCombinedGlobalValueSummary() {
3426 Stream.EnterSubblock(bitc::GLOBALVAL_SUMMARY_BLOCK_ID, 3);
3427 Stream.EmitRecord(bitc::FS_VERSION, ArrayRef<uint64_t>{INDEX_VERSION});
3429 // Abbrev for FS_COMBINED.
3430 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
3431 Abbv->Add(BitCodeAbbrevOp(bitc::FS_COMBINED));
3432 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8)); // valueid
3433 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8)); // modid
3434 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // flags
3435 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8)); // instcount
3436 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 4)); // numrefs
3437 // numrefs x valueid, n x (valueid, callsitecount)
3438 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
3439 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8));
3440 unsigned FSCallsAbbrev = Stream.EmitAbbrev(Abbv);
3442 // Abbrev for FS_COMBINED_PROFILE.
3443 Abbv = new BitCodeAbbrev();
3444 Abbv->Add(BitCodeAbbrevOp(bitc::FS_COMBINED_PROFILE));
3445 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8)); // valueid
3446 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8)); // modid
3447 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // flags
3448 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8)); // instcount
3449 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 4)); // numrefs
3450 // numrefs x valueid, n x (valueid, callsitecount, profilecount)
3451 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
3452 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8));
3453 unsigned FSCallsProfileAbbrev = Stream.EmitAbbrev(Abbv);
3455 // Abbrev for FS_COMBINED_GLOBALVAR_INIT_REFS.
3456 Abbv = new BitCodeAbbrev();
3457 Abbv->Add(BitCodeAbbrevOp(bitc::FS_COMBINED_GLOBALVAR_INIT_REFS));
3458 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8)); // valueid
3459 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8)); // modid
3460 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // flags
3461 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array)); // valueids
3462 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8));
3463 unsigned FSModRefsAbbrev = Stream.EmitAbbrev(Abbv);
3465 // Abbrev for FS_COMBINED_ALIAS.
3466 Abbv = new BitCodeAbbrev();
3467 Abbv->Add(BitCodeAbbrevOp(bitc::FS_COMBINED_ALIAS));
3468 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8)); // valueid
3469 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8)); // modid
3470 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // flags
3471 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8)); // valueid
3472 unsigned FSAliasAbbrev = Stream.EmitAbbrev(Abbv);
3474 // The aliases are emitted as a post-pass, and will point to the value
3475 // id of the aliasee. Save them in a vector for post-processing.
3476 SmallVector<AliasSummary *, 64> Aliases;
3478 // Save the value id for each summary for alias emission.
3479 DenseMap<const GlobalValueSummary *, unsigned> SummaryToValueIdMap;
3481 SmallVector<uint64_t, 64> NameVals;
3483 // For local linkage, we also emit the original name separately
3484 // immediately after the record.
3485 auto MaybeEmitOriginalName = [&](GlobalValueSummary &S) {
3486 if (!GlobalValue::isLocalLinkage(S.linkage()))
3488 NameVals.push_back(S.getOriginalName());
3489 Stream.EmitRecord(bitc::FS_COMBINED_ORIGINAL_NAME, NameVals);
3493 for (const auto &I : *this) {
3494 GlobalValueSummary *S = I.second;
3497 assert(hasValueId(I.first));
3498 unsigned ValueId = getValueId(I.first);
3499 SummaryToValueIdMap[S] = ValueId;
3501 if (auto *AS = dyn_cast<AliasSummary>(S)) {
3502 // Will process aliases as a post-pass because the reader wants all
3503 // global to be loaded first.
3504 Aliases.push_back(AS);
3508 if (auto *VS = dyn_cast<GlobalVarSummary>(S)) {
3509 NameVals.push_back(ValueId);
3510 NameVals.push_back(Index.getModuleId(VS->modulePath()));
3511 NameVals.push_back(getEncodedGVSummaryFlags(VS->flags()));
3512 for (auto &RI : VS->refs()) {
3513 NameVals.push_back(getValueId(RI.getGUID()));
3516 // Emit the finished record.
3517 Stream.EmitRecord(bitc::FS_COMBINED_GLOBALVAR_INIT_REFS, NameVals,
3520 MaybeEmitOriginalName(*S);
3524 auto *FS = cast<FunctionSummary>(S);
3525 NameVals.push_back(ValueId);
3526 NameVals.push_back(Index.getModuleId(FS->modulePath()));
3527 NameVals.push_back(getEncodedGVSummaryFlags(FS->flags()));
3528 NameVals.push_back(FS->instCount());
3529 NameVals.push_back(FS->refs().size());
3531 for (auto &RI : FS->refs()) {
3532 NameVals.push_back(getValueId(RI.getGUID()));
3535 bool HasProfileData = false;
3536 for (auto &EI : FS->calls()) {
3537 HasProfileData |= EI.second.ProfileCount != 0;
3542 for (auto &EI : FS->calls()) {
3543 // If this GUID doesn't have a value id, it doesn't have a function
3544 // summary and we don't need to record any calls to it.
3545 if (!hasValueId(EI.first.getGUID()))
3547 NameVals.push_back(getValueId(EI.first.getGUID()));
3548 assert(EI.second.CallsiteCount > 0 && "Expected at least one callsite");
3549 NameVals.push_back(EI.second.CallsiteCount);
3551 NameVals.push_back(EI.second.ProfileCount);
3554 unsigned FSAbbrev = (HasProfileData ? FSCallsProfileAbbrev : FSCallsAbbrev);
3556 (HasProfileData ? bitc::FS_COMBINED_PROFILE : bitc::FS_COMBINED);
3558 // Emit the finished record.
3559 Stream.EmitRecord(Code, NameVals, FSAbbrev);
3561 MaybeEmitOriginalName(*S);
3564 for (auto *AS : Aliases) {
3565 auto AliasValueId = SummaryToValueIdMap[AS];
3566 assert(AliasValueId);
3567 NameVals.push_back(AliasValueId);
3568 NameVals.push_back(Index.getModuleId(AS->modulePath()));
3569 NameVals.push_back(getEncodedGVSummaryFlags(AS->flags()));
3570 auto AliaseeValueId = SummaryToValueIdMap[&AS->getAliasee()];
3571 assert(AliaseeValueId);
3572 NameVals.push_back(AliaseeValueId);
3574 // Emit the finished record.
3575 Stream.EmitRecord(bitc::FS_COMBINED_ALIAS, NameVals, FSAliasAbbrev);
3577 MaybeEmitOriginalName(*AS);
3583 void ModuleBitcodeWriter::writeIdentificationBlock() {
3584 Stream.EnterSubblock(bitc::IDENTIFICATION_BLOCK_ID, 5);
3586 // Write the "user readable" string identifying the bitcode producer
3587 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
3588 Abbv->Add(BitCodeAbbrevOp(bitc::IDENTIFICATION_CODE_STRING));
3589 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
3590 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Char6));
3591 auto StringAbbrev = Stream.EmitAbbrev(Abbv);
3592 writeStringRecord(bitc::IDENTIFICATION_CODE_STRING,
3593 "LLVM" LLVM_VERSION_STRING, StringAbbrev);
3595 // Write the epoch version
3596 Abbv = new BitCodeAbbrev();
3597 Abbv->Add(BitCodeAbbrevOp(bitc::IDENTIFICATION_CODE_EPOCH));
3598 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));
3599 auto EpochAbbrev = Stream.EmitAbbrev(Abbv);
3600 SmallVector<unsigned, 1> Vals = {bitc::BITCODE_CURRENT_EPOCH};
3601 Stream.EmitRecord(bitc::IDENTIFICATION_CODE_EPOCH, Vals, EpochAbbrev);
3605 void ModuleBitcodeWriter::writeModuleHash(size_t BlockStartPos) {
3606 // Emit the module's hash.
3607 // MODULE_CODE_HASH: [5*i32]
3609 Hasher.update(ArrayRef<uint8_t>((const uint8_t *)&(Buffer)[BlockStartPos],
3610 Buffer.size() - BlockStartPos));
3611 auto Hash = Hasher.result();
3612 SmallVector<uint64_t, 20> Vals;
3613 auto LShift = [&](unsigned char Val, unsigned Amount)
3614 -> uint64_t { return ((uint64_t)Val) << Amount; };
3615 for (int Pos = 0; Pos < 20; Pos += 4) {
3616 uint32_t SubHash = LShift(Hash[Pos + 0], 24);
3617 SubHash |= LShift(Hash[Pos + 1], 16) | LShift(Hash[Pos + 2], 8) |
3618 (unsigned)(unsigned char)Hash[Pos + 3];
3619 Vals.push_back(SubHash);
3622 // Emit the finished record.
3623 Stream.EmitRecord(bitc::MODULE_CODE_HASH, Vals);
3626 void BitcodeWriter::write() {
3627 // Emit the file header first.
3628 writeBitcodeHeader();
3633 void ModuleBitcodeWriter::writeBlocks() {
3634 writeIdentificationBlock();
3638 void IndexBitcodeWriter::writeBlocks() {
3639 // Index contains only a single outer (module) block.
3643 void ModuleBitcodeWriter::writeModule() {
3644 Stream.EnterSubblock(bitc::MODULE_BLOCK_ID, 3);
3645 size_t BlockStartPos = Buffer.size();
3647 SmallVector<unsigned, 1> Vals;
3648 unsigned CurVersion = 1;
3649 Vals.push_back(CurVersion);
3650 Stream.EmitRecord(bitc::MODULE_CODE_VERSION, Vals);
3652 // Emit blockinfo, which defines the standard abbreviations etc.
3655 // Emit information about attribute groups.
3656 writeAttributeGroupTable();
3658 // Emit information about parameter attributes.
3659 writeAttributeTable();
3661 // Emit information describing all of the types in the module.
3666 // Emit top-level description of module, including target triple, inline asm,
3667 // descriptors for global variables, and function prototype info.
3671 writeModuleConstants();
3673 // Emit metadata kind names.
3674 writeModuleMetadataKinds();
3677 writeModuleMetadata();
3679 // Emit module-level use-lists.
3680 if (VE.shouldPreserveUseListOrder())
3681 writeUseListBlock(nullptr);
3683 writeOperandBundleTags();
3685 // Emit function bodies.
3686 DenseMap<const Function *, uint64_t> FunctionToBitcodeIndex;
3687 for (Module::const_iterator F = M.begin(), E = M.end(); F != E; ++F)
3688 if (!F->isDeclaration())
3689 writeFunction(*F, FunctionToBitcodeIndex);
3691 // Need to write after the above call to WriteFunction which populates
3692 // the summary information in the index.
3694 writePerModuleGlobalValueSummary();
3696 writeValueSymbolTable(M.getValueSymbolTable(),
3697 /* IsModuleLevel */ true, &FunctionToBitcodeIndex);
3700 writeModuleHash(BlockStartPos);
3706 static void writeInt32ToBuffer(uint32_t Value, SmallVectorImpl<char> &Buffer,
3707 uint32_t &Position) {
3708 support::endian::write32le(&Buffer[Position], Value);
3712 /// If generating a bc file on darwin, we have to emit a
3713 /// header and trailer to make it compatible with the system archiver. To do
3714 /// this we emit the following header, and then emit a trailer that pads the
3715 /// file out to be a multiple of 16 bytes.
3717 /// struct bc_header {
3718 /// uint32_t Magic; // 0x0B17C0DE
3719 /// uint32_t Version; // Version, currently always 0.
3720 /// uint32_t BitcodeOffset; // Offset to traditional bitcode file.
3721 /// uint32_t BitcodeSize; // Size of traditional bitcode file.
3722 /// uint32_t CPUType; // CPU specifier.
3723 /// ... potentially more later ...
3725 static void emitDarwinBCHeaderAndTrailer(SmallVectorImpl<char> &Buffer,
3727 unsigned CPUType = ~0U;
3729 // Match x86_64-*, i[3-9]86-*, powerpc-*, powerpc64-*, arm-*, thumb-*,
3730 // armv[0-9]-*, thumbv[0-9]-*, armv5te-*, or armv6t2-*. The CPUType is a magic
3731 // number from /usr/include/mach/machine.h. It is ok to reproduce the
3732 // specific constants here because they are implicitly part of the Darwin ABI.
3734 DARWIN_CPU_ARCH_ABI64 = 0x01000000,
3735 DARWIN_CPU_TYPE_X86 = 7,
3736 DARWIN_CPU_TYPE_ARM = 12,
3737 DARWIN_CPU_TYPE_POWERPC = 18
3740 Triple::ArchType Arch = TT.getArch();
3741 if (Arch == Triple::x86_64)
3742 CPUType = DARWIN_CPU_TYPE_X86 | DARWIN_CPU_ARCH_ABI64;
3743 else if (Arch == Triple::x86)
3744 CPUType = DARWIN_CPU_TYPE_X86;
3745 else if (Arch == Triple::ppc)
3746 CPUType = DARWIN_CPU_TYPE_POWERPC;
3747 else if (Arch == Triple::ppc64)
3748 CPUType = DARWIN_CPU_TYPE_POWERPC | DARWIN_CPU_ARCH_ABI64;
3749 else if (Arch == Triple::arm || Arch == Triple::thumb)
3750 CPUType = DARWIN_CPU_TYPE_ARM;
3752 // Traditional Bitcode starts after header.
3753 assert(Buffer.size() >= BWH_HeaderSize &&
3754 "Expected header size to be reserved");
3755 unsigned BCOffset = BWH_HeaderSize;
3756 unsigned BCSize = Buffer.size() - BWH_HeaderSize;
3758 // Write the magic and version.
3759 unsigned Position = 0;
3760 writeInt32ToBuffer(0x0B17C0DE, Buffer, Position);
3761 writeInt32ToBuffer(0, Buffer, Position); // Version.
3762 writeInt32ToBuffer(BCOffset, Buffer, Position);
3763 writeInt32ToBuffer(BCSize, Buffer, Position);
3764 writeInt32ToBuffer(CPUType, Buffer, Position);
3766 // If the file is not a multiple of 16 bytes, insert dummy padding.
3767 while (Buffer.size() & 15)
3768 Buffer.push_back(0);
3771 /// Helper to write the header common to all bitcode files.
3772 void BitcodeWriter::writeBitcodeHeader() {
3773 // Emit the file header.
3774 Stream.Emit((unsigned)'B', 8);
3775 Stream.Emit((unsigned)'C', 8);
3776 Stream.Emit(0x0, 4);
3777 Stream.Emit(0xC, 4);
3778 Stream.Emit(0xE, 4);
3779 Stream.Emit(0xD, 4);
3782 /// WriteBitcodeToFile - Write the specified module to the specified output
3784 void llvm::WriteBitcodeToFile(const Module *M, raw_ostream &Out,
3785 bool ShouldPreserveUseListOrder,
3786 const ModuleSummaryIndex *Index,
3787 bool GenerateHash) {
3788 SmallVector<char, 0> Buffer;
3789 Buffer.reserve(256*1024);
3791 // If this is darwin or another generic macho target, reserve space for the
3793 Triple TT(M->getTargetTriple());
3794 if (TT.isOSDarwin() || TT.isOSBinFormatMachO())
3795 Buffer.insert(Buffer.begin(), BWH_HeaderSize, 0);
3797 // Emit the module into the buffer.
3798 ModuleBitcodeWriter ModuleWriter(M, Buffer, ShouldPreserveUseListOrder, Index,
3800 ModuleWriter.write();
3802 if (TT.isOSDarwin() || TT.isOSBinFormatMachO())
3803 emitDarwinBCHeaderAndTrailer(Buffer, TT);
3805 // Write the generated bitstream to "Out".
3806 Out.write((char*)&Buffer.front(), Buffer.size());
3809 void IndexBitcodeWriter::writeIndex() {
3810 Stream.EnterSubblock(bitc::MODULE_BLOCK_ID, 3);
3812 SmallVector<unsigned, 1> Vals;
3813 unsigned CurVersion = 1;
3814 Vals.push_back(CurVersion);
3815 Stream.EmitRecord(bitc::MODULE_CODE_VERSION, Vals);
3817 // If we have a VST, write the VSTOFFSET record placeholder.
3818 writeValueSymbolTableForwardDecl();
3820 // Write the module paths in the combined index.
3823 // Write the summary combined index records.
3824 writeCombinedGlobalValueSummary();
3826 // Need a special VST writer for the combined index (we don't have a
3827 // real VST and real values when this is invoked).
3828 writeCombinedValueSymbolTable();
3833 // Write the specified module summary index to the given raw output stream,
3834 // where it will be written in a new bitcode block. This is used when
3835 // writing the combined index file for ThinLTO. When writing a subset of the
3836 // index for a distributed backend, provide a \p ModuleToSummariesForIndex map.
3837 void llvm::WriteIndexToFile(
3838 const ModuleSummaryIndex &Index, raw_ostream &Out,
3839 std::map<std::string, GVSummaryMapTy> *ModuleToSummariesForIndex) {
3840 SmallVector<char, 0> Buffer;
3841 Buffer.reserve(256 * 1024);
3843 IndexBitcodeWriter IndexWriter(Buffer, Index, ModuleToSummariesForIndex);
3844 IndexWriter.write();
3846 Out.write((char *)&Buffer.front(), Buffer.size());