Bug Summary

File:lib/Bitcode/Reader/BitcodeReader.cpp
Warning:line 4193, column 9
Value stored to 'Ty' is never read

Annotated Source Code

1//===- BitcodeReader.cpp - Internal BitcodeReader implementation ----------===//
2//
3// The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9
10#include "llvm/Bitcode/BitcodeReader.h"
11#include "MetadataLoader.h"
12#include "ValueList.h"
13
14#include "llvm/ADT/APFloat.h"
15#include "llvm/ADT/APInt.h"
16#include "llvm/ADT/ArrayRef.h"
17#include "llvm/ADT/DenseMap.h"
18#include "llvm/ADT/None.h"
19#include "llvm/ADT/STLExtras.h"
20#include "llvm/ADT/SmallString.h"
21#include "llvm/ADT/SmallVector.h"
22#include "llvm/ADT/StringRef.h"
23#include "llvm/ADT/Triple.h"
24#include "llvm/ADT/Twine.h"
25#include "llvm/Bitcode/BitstreamReader.h"
26#include "llvm/Bitcode/LLVMBitCodes.h"
27#include "llvm/IR/Argument.h"
28#include "llvm/IR/Attributes.h"
29#include "llvm/IR/AutoUpgrade.h"
30#include "llvm/IR/BasicBlock.h"
31#include "llvm/IR/CallingConv.h"
32#include "llvm/IR/CallSite.h"
33#include "llvm/IR/Comdat.h"
34#include "llvm/IR/Constant.h"
35#include "llvm/IR/Constants.h"
36#include "llvm/IR/DebugInfo.h"
37#include "llvm/IR/DebugInfoMetadata.h"
38#include "llvm/IR/DebugLoc.h"
39#include "llvm/IR/DerivedTypes.h"
40#include "llvm/IR/DiagnosticInfo.h"
41#include "llvm/IR/DiagnosticPrinter.h"
42#include "llvm/IR/Function.h"
43#include "llvm/IR/GlobalAlias.h"
44#include "llvm/IR/GlobalIFunc.h"
45#include "llvm/IR/GlobalIndirectSymbol.h"
46#include "llvm/IR/GlobalObject.h"
47#include "llvm/IR/GlobalValue.h"
48#include "llvm/IR/GlobalVariable.h"
49#include "llvm/IR/GVMaterializer.h"
50#include "llvm/IR/InlineAsm.h"
51#include "llvm/IR/InstIterator.h"
52#include "llvm/IR/InstrTypes.h"
53#include "llvm/IR/Instruction.h"
54#include "llvm/IR/Instructions.h"
55#include "llvm/IR/Intrinsics.h"
56#include "llvm/IR/LLVMContext.h"
57#include "llvm/IR/Module.h"
58#include "llvm/IR/ModuleSummaryIndex.h"
59#include "llvm/IR/OperandTraits.h"
60#include "llvm/IR/Operator.h"
61#include "llvm/IR/TrackingMDRef.h"
62#include "llvm/IR/Type.h"
63#include "llvm/IR/ValueHandle.h"
64#include "llvm/IR/Verifier.h"
65#include "llvm/Support/AtomicOrdering.h"
66#include "llvm/Support/Casting.h"
67#include "llvm/Support/CommandLine.h"
68#include "llvm/Support/Compiler.h"
69#include "llvm/Support/Debug.h"
70#include "llvm/Support/Error.h"
71#include "llvm/Support/ErrorHandling.h"
72#include "llvm/Support/ManagedStatic.h"
73#include "llvm/Support/MemoryBuffer.h"
74#include "llvm/Support/raw_ostream.h"
75#include <algorithm>
76#include <cassert>
77#include <cstddef>
78#include <cstdint>
79#include <deque>
80#include <limits>
81#include <map>
82#include <memory>
83#include <string>
84#include <system_error>
85#include <tuple>
86#include <utility>
87#include <vector>
88
89using namespace llvm;
90
91static cl::opt<bool> PrintSummaryGUIDs(
92 "print-summary-global-ids", cl::init(false), cl::Hidden,
93 cl::desc(
94 "Print the global id for each value when reading the module summary"));
95
96namespace {
97
98enum {
99 SWITCH_INST_MAGIC = 0x4B5 // May 2012 => 1205 => Hex
100};
101
102Error error(const Twine &Message) {
103 return make_error<StringError>(
104 Message, make_error_code(BitcodeError::CorruptedBitcode));
105}
106
107/// Helper to read the header common to all bitcode files.
108bool hasValidBitcodeHeader(BitstreamCursor &Stream) {
109 // Sniff for the signature.
110 if (!Stream.canSkipToPos(4) ||
111 Stream.Read(8) != 'B' ||
112 Stream.Read(8) != 'C' ||
113 Stream.Read(4) != 0x0 ||
114 Stream.Read(4) != 0xC ||
115 Stream.Read(4) != 0xE ||
116 Stream.Read(4) != 0xD)
117 return false;
118 return true;
119}
120
121Expected<BitstreamCursor> initStream(MemoryBufferRef Buffer) {
122 const unsigned char *BufPtr = (const unsigned char *)Buffer.getBufferStart();
123 const unsigned char *BufEnd = BufPtr + Buffer.getBufferSize();
124
125 if (Buffer.getBufferSize() & 3)
126 return error("Invalid bitcode signature");
127
128 // If we have a wrapper header, parse it and ignore the non-bc file contents.
129 // The magic number is 0x0B17C0DE stored in little endian.
130 if (isBitcodeWrapper(BufPtr, BufEnd))
131 if (SkipBitcodeWrapperHeader(BufPtr, BufEnd, true))
132 return error("Invalid bitcode wrapper header");
133
134 BitstreamCursor Stream(ArrayRef<uint8_t>(BufPtr, BufEnd));
135 if (!hasValidBitcodeHeader(Stream))
136 return error("Invalid bitcode signature");
137
138 return std::move(Stream);
139}
140
141/// Convert a string from a record into an std::string, return true on failure.
142template <typename StrTy>
143static bool convertToString(ArrayRef<uint64_t> Record, unsigned Idx,
144 StrTy &Result) {
145 if (Idx > Record.size())
146 return true;
147
148 for (unsigned i = Idx, e = Record.size(); i != e; ++i)
149 Result += (char)Record[i];
150 return false;
151}
152
153// Strip all the TBAA attachment for the module.
154void stripTBAA(Module *M) {
155 for (auto &F : *M) {
156 if (F.isMaterializable())
157 continue;
158 for (auto &I : instructions(F))
159 I.setMetadata(LLVMContext::MD_tbaa, nullptr);
160 }
161}
162
163/// Read the "IDENTIFICATION_BLOCK_ID" block, do some basic enforcement on the
164/// "epoch" encoded in the bitcode, and return the producer name if any.
165Expected<std::string> readIdentificationBlock(BitstreamCursor &Stream) {
166 if (Stream.EnterSubBlock(bitc::IDENTIFICATION_BLOCK_ID))
167 return error("Invalid record");
168
169 // Read all the records.
170 SmallVector<uint64_t, 64> Record;
171
172 std::string ProducerIdentification;
173
174 while (true) {
175 BitstreamEntry Entry = Stream.advance();
176
177 switch (Entry.Kind) {
178 default:
179 case BitstreamEntry::Error:
180 return error("Malformed block");
181 case BitstreamEntry::EndBlock:
182 return ProducerIdentification;
183 case BitstreamEntry::Record:
184 // The interesting case.
185 break;
186 }
187
188 // Read a record.
189 Record.clear();
190 unsigned BitCode = Stream.readRecord(Entry.ID, Record);
191 switch (BitCode) {
192 default: // Default behavior: reject
193 return error("Invalid value");
194 case bitc::IDENTIFICATION_CODE_STRING: // IDENTIFICATION: [strchr x N]
195 convertToString(Record, 0, ProducerIdentification);
196 break;
197 case bitc::IDENTIFICATION_CODE_EPOCH: { // EPOCH: [epoch#]
198 unsigned epoch = (unsigned)Record[0];
199 if (epoch != bitc::BITCODE_CURRENT_EPOCH) {
200 return error(
201 Twine("Incompatible epoch: Bitcode '") + Twine(epoch) +
202 "' vs current: '" + Twine(bitc::BITCODE_CURRENT_EPOCH) + "'");
203 }
204 }
205 }
206 }
207}
208
209Expected<std::string> readIdentificationCode(BitstreamCursor &Stream) {
210 // We expect a number of well-defined blocks, though we don't necessarily
211 // need to understand them all.
212 while (true) {
213 if (Stream.AtEndOfStream())
214 return "";
215
216 BitstreamEntry Entry = Stream.advance();
217 switch (Entry.Kind) {
218 case BitstreamEntry::EndBlock:
219 case BitstreamEntry::Error:
220 return error("Malformed block");
221
222 case BitstreamEntry::SubBlock:
223 if (Entry.ID == bitc::IDENTIFICATION_BLOCK_ID)
224 return readIdentificationBlock(Stream);
225
226 // Ignore other sub-blocks.
227 if (Stream.SkipBlock())
228 return error("Malformed block");
229 continue;
230 case BitstreamEntry::Record:
231 Stream.skipRecord(Entry.ID);
232 continue;
233 }
234 }
235}
236
237Expected<bool> hasObjCCategoryInModule(BitstreamCursor &Stream) {
238 if (Stream.EnterSubBlock(bitc::MODULE_BLOCK_ID))
239 return error("Invalid record");
240
241 SmallVector<uint64_t, 64> Record;
242 // Read all the records for this module.
243
244 while (true) {
245 BitstreamEntry Entry = Stream.advanceSkippingSubblocks();
246
247 switch (Entry.Kind) {
248 case BitstreamEntry::SubBlock: // Handled for us already.
249 case BitstreamEntry::Error:
250 return error("Malformed block");
251 case BitstreamEntry::EndBlock:
252 return false;
253 case BitstreamEntry::Record:
254 // The interesting case.
255 break;
256 }
257
258 // Read a record.
259 switch (Stream.readRecord(Entry.ID, Record)) {
260 default:
261 break; // Default behavior, ignore unknown content.
262 case bitc::MODULE_CODE_SECTIONNAME: { // SECTIONNAME: [strchr x N]
263 std::string S;
264 if (convertToString(Record, 0, S))
265 return error("Invalid record");
266 // Check for the i386 and other (x86_64, ARM) conventions
267 if (S.find("__DATA, __objc_catlist") != std::string::npos ||
268 S.find("__OBJC,__category") != std::string::npos)
269 return true;
270 break;
271 }
272 }
273 Record.clear();
274 }
275 llvm_unreachable("Exit infinite loop")::llvm::llvm_unreachable_internal("Exit infinite loop", "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301769/lib/Bitcode/Reader/BitcodeReader.cpp"
, 275)
;
276}
277
278Expected<bool> hasObjCCategory(BitstreamCursor &Stream) {
279 // We expect a number of well-defined blocks, though we don't necessarily
280 // need to understand them all.
281 while (true) {
282 BitstreamEntry Entry = Stream.advance();
283
284 switch (Entry.Kind) {
285 case BitstreamEntry::Error:
286 return error("Malformed block");
287 case BitstreamEntry::EndBlock:
288 return false;
289
290 case BitstreamEntry::SubBlock:
291 if (Entry.ID == bitc::MODULE_BLOCK_ID)
292 return hasObjCCategoryInModule(Stream);
293
294 // Ignore other sub-blocks.
295 if (Stream.SkipBlock())
296 return error("Malformed block");
297 continue;
298
299 case BitstreamEntry::Record:
300 Stream.skipRecord(Entry.ID);
301 continue;
302 }
303 }
304}
305
306Expected<std::string> readModuleTriple(BitstreamCursor &Stream) {
307 if (Stream.EnterSubBlock(bitc::MODULE_BLOCK_ID))
308 return error("Invalid record");
309
310 SmallVector<uint64_t, 64> Record;
311
312 std::string Triple;
313
314 // Read all the records for this module.
315 while (true) {
316 BitstreamEntry Entry = Stream.advanceSkippingSubblocks();
317
318 switch (Entry.Kind) {
319 case BitstreamEntry::SubBlock: // Handled for us already.
320 case BitstreamEntry::Error:
321 return error("Malformed block");
322 case BitstreamEntry::EndBlock:
323 return Triple;
324 case BitstreamEntry::Record:
325 // The interesting case.
326 break;
327 }
328
329 // Read a record.
330 switch (Stream.readRecord(Entry.ID, Record)) {
331 default: break; // Default behavior, ignore unknown content.
332 case bitc::MODULE_CODE_TRIPLE: { // TRIPLE: [strchr x N]
333 std::string S;
334 if (convertToString(Record, 0, S))
335 return error("Invalid record");
336 Triple = S;
337 break;
338 }
339 }
340 Record.clear();
341 }
342 llvm_unreachable("Exit infinite loop")::llvm::llvm_unreachable_internal("Exit infinite loop", "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301769/lib/Bitcode/Reader/BitcodeReader.cpp"
, 342)
;
343}
344
345Expected<std::string> readTriple(BitstreamCursor &Stream) {
346 // We expect a number of well-defined blocks, though we don't necessarily
347 // need to understand them all.
348 while (true) {
349 BitstreamEntry Entry = Stream.advance();
350
351 switch (Entry.Kind) {
352 case BitstreamEntry::Error:
353 return error("Malformed block");
354 case BitstreamEntry::EndBlock:
355 return "";
356
357 case BitstreamEntry::SubBlock:
358 if (Entry.ID == bitc::MODULE_BLOCK_ID)
359 return readModuleTriple(Stream);
360
361 // Ignore other sub-blocks.
362 if (Stream.SkipBlock())
363 return error("Malformed block");
364 continue;
365
366 case BitstreamEntry::Record:
367 Stream.skipRecord(Entry.ID);
368 continue;
369 }
370 }
371}
372
373class BitcodeReaderBase {
374protected:
375 BitcodeReaderBase(BitstreamCursor Stream, StringRef Strtab)
376 : Stream(std::move(Stream)), Strtab(Strtab) {
377 this->Stream.setBlockInfo(&BlockInfo);
378 }
379
380 BitstreamBlockInfo BlockInfo;
381 BitstreamCursor Stream;
382 StringRef Strtab;
383
384 /// In version 2 of the bitcode we store names of global values and comdats in
385 /// a string table rather than in the VST.
386 bool UseStrtab = false;
387
388 Expected<unsigned> parseVersionRecord(ArrayRef<uint64_t> Record);
389
390 /// If this module uses a string table, pop the reference to the string table
391 /// and return the referenced string and the rest of the record. Otherwise
392 /// just return the record itself.
393 std::pair<StringRef, ArrayRef<uint64_t>>
394 readNameFromStrtab(ArrayRef<uint64_t> Record);
395
396 bool readBlockInfo();
397
398 // Contains an arbitrary and optional string identifying the bitcode producer
399 std::string ProducerIdentification;
400
401 Error error(const Twine &Message);
402};
403
404Error BitcodeReaderBase::error(const Twine &Message) {
405 std::string FullMsg = Message.str();
406 if (!ProducerIdentification.empty())
407 FullMsg += " (Producer: '" + ProducerIdentification + "' Reader: 'LLVM " +
408 LLVM_VERSION_STRING"5.0.0" "')";
409 return ::error(FullMsg);
410}
411
412Expected<unsigned>
413BitcodeReaderBase::parseVersionRecord(ArrayRef<uint64_t> Record) {
414 if (Record.size() < 1)
415 return error("Invalid record");
416 unsigned ModuleVersion = Record[0];
417 if (ModuleVersion > 2)
418 return error("Invalid value");
419 UseStrtab = ModuleVersion >= 2;
420 return ModuleVersion;
421}
422
423std::pair<StringRef, ArrayRef<uint64_t>>
424BitcodeReaderBase::readNameFromStrtab(ArrayRef<uint64_t> Record) {
425 if (!UseStrtab)
426 return {"", Record};
427 // Invalid reference. Let the caller complain about the record being empty.
428 if (Record[0] + Record[1] > Strtab.size())
429 return {"", {}};
430 return {StringRef(Strtab.data() + Record[0], Record[1]), Record.slice(2)};
431}
432
433class BitcodeReader : public BitcodeReaderBase, public GVMaterializer {
434 LLVMContext &Context;
435 Module *TheModule = nullptr;
436 // Next offset to start scanning for lazy parsing of function bodies.
437 uint64_t NextUnreadBit = 0;
438 // Last function offset found in the VST.
439 uint64_t LastFunctionBlockBit = 0;
440 bool SeenValueSymbolTable = false;
441 uint64_t VSTOffset = 0;
442
443 std::vector<std::string> SectionTable;
444 std::vector<std::string> GCTable;
445
446 std::vector<Type*> TypeList;
447 BitcodeReaderValueList ValueList;
448 Optional<MetadataLoader> MDLoader;
449 std::vector<Comdat *> ComdatList;
450 SmallVector<Instruction *, 64> InstructionList;
451
452 std::vector<std::pair<GlobalVariable*, unsigned> > GlobalInits;
453 std::vector<std::pair<GlobalIndirectSymbol*, unsigned> > IndirectSymbolInits;
454 std::vector<std::pair<Function*, unsigned> > FunctionPrefixes;
455 std::vector<std::pair<Function*, unsigned> > FunctionPrologues;
456 std::vector<std::pair<Function*, unsigned> > FunctionPersonalityFns;
457
458 /// The set of attributes by index. Index zero in the file is for null, and
459 /// is thus not represented here. As such all indices are off by one.
460 std::vector<AttributeList> MAttributes;
461
462 /// The set of attribute groups.
463 std::map<unsigned, AttributeList> MAttributeGroups;
464
465 /// While parsing a function body, this is a list of the basic blocks for the
466 /// function.
467 std::vector<BasicBlock*> FunctionBBs;
468
469 // When reading the module header, this list is populated with functions that
470 // have bodies later in the file.
471 std::vector<Function*> FunctionsWithBodies;
472
473 // When intrinsic functions are encountered which require upgrading they are
474 // stored here with their replacement function.
475 typedef DenseMap<Function*, Function*> UpdatedIntrinsicMap;
476 UpdatedIntrinsicMap UpgradedIntrinsics;
477 // Intrinsics which were remangled because of types rename
478 UpdatedIntrinsicMap RemangledIntrinsics;
479
480 // Several operations happen after the module header has been read, but
481 // before function bodies are processed. This keeps track of whether
482 // we've done this yet.
483 bool SeenFirstFunctionBody = false;
484
485 /// When function bodies are initially scanned, this map contains info about
486 /// where to find deferred function body in the stream.
487 DenseMap<Function*, uint64_t> DeferredFunctionInfo;
488
489 /// When Metadata block is initially scanned when parsing the module, we may
490 /// choose to defer parsing of the metadata. This vector contains info about
491 /// which Metadata blocks are deferred.
492 std::vector<uint64_t> DeferredMetadataInfo;
493
494 /// These are basic blocks forward-referenced by block addresses. They are
495 /// inserted lazily into functions when they're loaded. The basic block ID is
496 /// its index into the vector.
497 DenseMap<Function *, std::vector<BasicBlock *>> BasicBlockFwdRefs;
498 std::deque<Function *> BasicBlockFwdRefQueue;
499
500 /// Indicates that we are using a new encoding for instruction operands where
501 /// most operands in the current FUNCTION_BLOCK are encoded relative to the
502 /// instruction number, for a more compact encoding. Some instruction
503 /// operands are not relative to the instruction ID: basic block numbers, and
504 /// types. Once the old style function blocks have been phased out, we would
505 /// not need this flag.
506 bool UseRelativeIDs = false;
507
508 /// True if all functions will be materialized, negating the need to process
509 /// (e.g.) blockaddress forward references.
510 bool WillMaterializeAllForwardRefs = false;
511
512 bool StripDebugInfo = false;
513 TBAAVerifier TBAAVerifyHelper;
514
515 std::vector<std::string> BundleTags;
516
517public:
518 BitcodeReader(BitstreamCursor Stream, StringRef Strtab,
519 StringRef ProducerIdentification, LLVMContext &Context);
520
521 Error materializeForwardReferencedFunctions();
522
523 Error materialize(GlobalValue *GV) override;
524 Error materializeModule() override;
525 std::vector<StructType *> getIdentifiedStructTypes() const override;
526
527 /// \brief Main interface to parsing a bitcode buffer.
528 /// \returns true if an error occurred.
529 Error parseBitcodeInto(Module *M, bool ShouldLazyLoadMetadata = false,
530 bool IsImporting = false);
531
532 static uint64_t decodeSignRotatedValue(uint64_t V);
533
534 /// Materialize any deferred Metadata block.
535 Error materializeMetadata() override;
536
537 void setStripDebugInfo() override;
538
539private:
540 std::vector<StructType *> IdentifiedStructTypes;
541 StructType *createIdentifiedStructType(LLVMContext &Context, StringRef Name);
542 StructType *createIdentifiedStructType(LLVMContext &Context);
543
544 Type *getTypeByID(unsigned ID);
545
546 Value *getFnValueByID(unsigned ID, Type *Ty) {
547 if (Ty && Ty->isMetadataTy())
548 return MetadataAsValue::get(Ty->getContext(), getFnMetadataByID(ID));
549 return ValueList.getValueFwdRef(ID, Ty);
550 }
551
552 Metadata *getFnMetadataByID(unsigned ID) {
553 return MDLoader->getMetadataFwdRefOrLoad(ID);
554 }
555
556 BasicBlock *getBasicBlock(unsigned ID) const {
557 if (ID >= FunctionBBs.size()) return nullptr; // Invalid ID
558 return FunctionBBs[ID];
559 }
560
561 AttributeList getAttributes(unsigned i) const {
562 if (i-1 < MAttributes.size())
563 return MAttributes[i-1];
564 return AttributeList();
565 }
566
567 /// Read a value/type pair out of the specified record from slot 'Slot'.
568 /// Increment Slot past the number of slots used in the record. Return true on
569 /// failure.
570 bool getValueTypePair(SmallVectorImpl<uint64_t> &Record, unsigned &Slot,
571 unsigned InstNum, Value *&ResVal) {
572 if (Slot == Record.size()) return true;
573 unsigned ValNo = (unsigned)Record[Slot++];
574 // Adjust the ValNo, if it was encoded relative to the InstNum.
575 if (UseRelativeIDs)
576 ValNo = InstNum - ValNo;
577 if (ValNo < InstNum) {
578 // If this is not a forward reference, just return the value we already
579 // have.
580 ResVal = getFnValueByID(ValNo, nullptr);
581 return ResVal == nullptr;
582 }
583 if (Slot == Record.size())
584 return true;
585
586 unsigned TypeNo = (unsigned)Record[Slot++];
587 ResVal = getFnValueByID(ValNo, getTypeByID(TypeNo));
588 return ResVal == nullptr;
589 }
590
591 /// Read a value out of the specified record from slot 'Slot'. Increment Slot
592 /// past the number of slots used by the value in the record. Return true if
593 /// there is an error.
594 bool popValue(SmallVectorImpl<uint64_t> &Record, unsigned &Slot,
595 unsigned InstNum, Type *Ty, Value *&ResVal) {
596 if (getValue(Record, Slot, InstNum, Ty, ResVal))
597 return true;
598 // All values currently take a single record slot.
599 ++Slot;
600 return false;
601 }
602
603 /// Like popValue, but does not increment the Slot number.
604 bool getValue(SmallVectorImpl<uint64_t> &Record, unsigned Slot,
605 unsigned InstNum, Type *Ty, Value *&ResVal) {
606 ResVal = getValue(Record, Slot, InstNum, Ty);
607 return ResVal == nullptr;
608 }
609
610 /// Version of getValue that returns ResVal directly, or 0 if there is an
611 /// error.
612 Value *getValue(SmallVectorImpl<uint64_t> &Record, unsigned Slot,
613 unsigned InstNum, Type *Ty) {
614 if (Slot == Record.size()) return nullptr;
615 unsigned ValNo = (unsigned)Record[Slot];
616 // Adjust the ValNo, if it was encoded relative to the InstNum.
617 if (UseRelativeIDs)
618 ValNo = InstNum - ValNo;
619 return getFnValueByID(ValNo, Ty);
620 }
621
622 /// Like getValue, but decodes signed VBRs.
623 Value *getValueSigned(SmallVectorImpl<uint64_t> &Record, unsigned Slot,
624 unsigned InstNum, Type *Ty) {
625 if (Slot == Record.size()) return nullptr;
626 unsigned ValNo = (unsigned)decodeSignRotatedValue(Record[Slot]);
627 // Adjust the ValNo, if it was encoded relative to the InstNum.
628 if (UseRelativeIDs)
629 ValNo = InstNum - ValNo;
630 return getFnValueByID(ValNo, Ty);
631 }
632
633 /// Converts alignment exponent (i.e. power of two (or zero)) to the
634 /// corresponding alignment to use. If alignment is too large, returns
635 /// a corresponding error code.
636 Error parseAlignmentValue(uint64_t Exponent, unsigned &Alignment);
637 Error parseAttrKind(uint64_t Code, Attribute::AttrKind *Kind);
638 Error parseModule(uint64_t ResumeBit, bool ShouldLazyLoadMetadata = false);
639
640 Error parseComdatRecord(ArrayRef<uint64_t> Record);
641 Error parseGlobalVarRecord(ArrayRef<uint64_t> Record);
642 Error parseFunctionRecord(ArrayRef<uint64_t> Record);
643 Error parseGlobalIndirectSymbolRecord(unsigned BitCode,
644 ArrayRef<uint64_t> Record);
645
646 Error parseAttributeBlock();
647 Error parseAttributeGroupBlock();
648 Error parseTypeTable();
649 Error parseTypeTableBody();
650 Error parseOperandBundleTags();
651
652 Expected<Value *> recordValue(SmallVectorImpl<uint64_t> &Record,
653 unsigned NameIndex, Triple &TT);
654 void setDeferredFunctionInfo(unsigned FuncBitcodeOffsetDelta, Function *F,
655 ArrayRef<uint64_t> Record);
656 Error parseValueSymbolTable(uint64_t Offset = 0);
657 Error parseGlobalValueSymbolTable();
658 Error parseConstants();
659 Error rememberAndSkipFunctionBodies();
660 Error rememberAndSkipFunctionBody();
661 /// Save the positions of the Metadata blocks and skip parsing the blocks.
662 Error rememberAndSkipMetadata();
663 Error typeCheckLoadStoreInst(Type *ValType, Type *PtrType);
664 Error parseFunctionBody(Function *F);
665 Error globalCleanup();
666 Error resolveGlobalAndIndirectSymbolInits();
667 Error parseUseLists();
668 Error findFunctionInStream(
669 Function *F,
670 DenseMap<Function *, uint64_t>::iterator DeferredFunctionInfoIterator);
671};
672
673/// Class to manage reading and parsing function summary index bitcode
674/// files/sections.
675class ModuleSummaryIndexBitcodeReader : public BitcodeReaderBase {
676 /// The module index built during parsing.
677 ModuleSummaryIndex &TheIndex;
678
679 /// Indicates whether we have encountered a global value summary section
680 /// yet during parsing.
681 bool SeenGlobalValSummary = false;
682
683 /// Indicates whether we have already parsed the VST, used for error checking.
684 bool SeenValueSymbolTable = false;
685
686 /// Set to the offset of the VST recorded in the MODULE_CODE_VSTOFFSET record.
687 /// Used to enable on-demand parsing of the VST.
688 uint64_t VSTOffset = 0;
689
690 // Map to save ValueId to GUID association that was recorded in the
691 // ValueSymbolTable. It is used after the VST is parsed to convert
692 // call graph edges read from the function summary from referencing
693 // callees by their ValueId to using the GUID instead, which is how
694 // they are recorded in the summary index being built.
695 // We save a second GUID which is the same as the first one, but ignoring the
696 // linkage, i.e. for value other than local linkage they are identical.
697 DenseMap<unsigned, std::pair<GlobalValue::GUID, GlobalValue::GUID>>
698 ValueIdToCallGraphGUIDMap;
699
700 /// Map populated during module path string table parsing, from the
701 /// module ID to a string reference owned by the index's module
702 /// path string table, used to correlate with combined index
703 /// summary records.
704 DenseMap<uint64_t, StringRef> ModuleIdMap;
705
706 /// Original source file name recorded in a bitcode record.
707 std::string SourceFileName;
708
709public:
710 ModuleSummaryIndexBitcodeReader(BitstreamCursor Stream, StringRef Strtab,
711 ModuleSummaryIndex &TheIndex);
712
713 Error parseModule(StringRef ModulePath);
714
715private:
716 void setValueGUID(uint64_t ValueID, StringRef ValueName,
717 GlobalValue::LinkageTypes Linkage,
718 StringRef SourceFileName);
719 Error parseValueSymbolTable(
720 uint64_t Offset,
721 DenseMap<unsigned, GlobalValue::LinkageTypes> &ValueIdToLinkageMap);
722 std::vector<ValueInfo> makeRefList(ArrayRef<uint64_t> Record);
723 std::vector<FunctionSummary::EdgeTy> makeCallList(ArrayRef<uint64_t> Record,
724 bool IsOldProfileFormat,
725 bool HasProfile);
726 Error parseEntireSummary(StringRef ModulePath);
727 Error parseModuleStringTable();
728
729 std::pair<GlobalValue::GUID, GlobalValue::GUID>
730 getGUIDFromValueId(unsigned ValueId);
731};
732
733} // end anonymous namespace
734
735std::error_code llvm::errorToErrorCodeAndEmitErrors(LLVMContext &Ctx,
736 Error Err) {
737 if (Err) {
738 std::error_code EC;
739 handleAllErrors(std::move(Err), [&](ErrorInfoBase &EIB) {
740 EC = EIB.convertToErrorCode();
741 Ctx.emitError(EIB.message());
742 });
743 return EC;
744 }
745 return std::error_code();
746}
747
748BitcodeReader::BitcodeReader(BitstreamCursor Stream, StringRef Strtab,
749 StringRef ProducerIdentification,
750 LLVMContext &Context)
751 : BitcodeReaderBase(std::move(Stream), Strtab), Context(Context),
752 ValueList(Context) {
753 this->ProducerIdentification = ProducerIdentification;
754}
755
756Error BitcodeReader::materializeForwardReferencedFunctions() {
757 if (WillMaterializeAllForwardRefs)
758 return Error::success();
759
760 // Prevent recursion.
761 WillMaterializeAllForwardRefs = true;
762
763 while (!BasicBlockFwdRefQueue.empty()) {
764 Function *F = BasicBlockFwdRefQueue.front();
765 BasicBlockFwdRefQueue.pop_front();
766 assert(F && "Expected valid function")((F && "Expected valid function") ? static_cast<void
> (0) : __assert_fail ("F && \"Expected valid function\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301769/lib/Bitcode/Reader/BitcodeReader.cpp"
, 766, __PRETTY_FUNCTION__))
;
767 if (!BasicBlockFwdRefs.count(F))
768 // Already materialized.
769 continue;
770
771 // Check for a function that isn't materializable to prevent an infinite
772 // loop. When parsing a blockaddress stored in a global variable, there
773 // isn't a trivial way to check if a function will have a body without a
774 // linear search through FunctionsWithBodies, so just check it here.
775 if (!F->isMaterializable())
776 return error("Never resolved function from blockaddress");
777
778 // Try to materialize F.
779 if (Error Err = materialize(F))
780 return Err;
781 }
782 assert(BasicBlockFwdRefs.empty() && "Function missing from queue")((BasicBlockFwdRefs.empty() && "Function missing from queue"
) ? static_cast<void> (0) : __assert_fail ("BasicBlockFwdRefs.empty() && \"Function missing from queue\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301769/lib/Bitcode/Reader/BitcodeReader.cpp"
, 782, __PRETTY_FUNCTION__))
;
783
784 // Reset state.
785 WillMaterializeAllForwardRefs = false;
786 return Error::success();
787}
788
789//===----------------------------------------------------------------------===//
790// Helper functions to implement forward reference resolution, etc.
791//===----------------------------------------------------------------------===//
792
793static bool hasImplicitComdat(size_t Val) {
794 switch (Val) {
795 default:
796 return false;
797 case 1: // Old WeakAnyLinkage
798 case 4: // Old LinkOnceAnyLinkage
799 case 10: // Old WeakODRLinkage
800 case 11: // Old LinkOnceODRLinkage
801 return true;
802 }
803}
804
805static GlobalValue::LinkageTypes getDecodedLinkage(unsigned Val) {
806 switch (Val) {
807 default: // Map unknown/new linkages to external
808 case 0:
809 return GlobalValue::ExternalLinkage;
810 case 2:
811 return GlobalValue::AppendingLinkage;
812 case 3:
813 return GlobalValue::InternalLinkage;
814 case 5:
815 return GlobalValue::ExternalLinkage; // Obsolete DLLImportLinkage
816 case 6:
817 return GlobalValue::ExternalLinkage; // Obsolete DLLExportLinkage
818 case 7:
819 return GlobalValue::ExternalWeakLinkage;
820 case 8:
821 return GlobalValue::CommonLinkage;
822 case 9:
823 return GlobalValue::PrivateLinkage;
824 case 12:
825 return GlobalValue::AvailableExternallyLinkage;
826 case 13:
827 return GlobalValue::PrivateLinkage; // Obsolete LinkerPrivateLinkage
828 case 14:
829 return GlobalValue::PrivateLinkage; // Obsolete LinkerPrivateWeakLinkage
830 case 15:
831 return GlobalValue::ExternalLinkage; // Obsolete LinkOnceODRAutoHideLinkage
832 case 1: // Old value with implicit comdat.
833 case 16:
834 return GlobalValue::WeakAnyLinkage;
835 case 10: // Old value with implicit comdat.
836 case 17:
837 return GlobalValue::WeakODRLinkage;
838 case 4: // Old value with implicit comdat.
839 case 18:
840 return GlobalValue::LinkOnceAnyLinkage;
841 case 11: // Old value with implicit comdat.
842 case 19:
843 return GlobalValue::LinkOnceODRLinkage;
844 }
845}
846
847/// Decode the flags for GlobalValue in the summary.
848static GlobalValueSummary::GVFlags getDecodedGVSummaryFlags(uint64_t RawFlags,
849 uint64_t Version) {
850 // Summary were not emitted before LLVM 3.9, we don't need to upgrade Linkage
851 // like getDecodedLinkage() above. Any future change to the linkage enum and
852 // to getDecodedLinkage() will need to be taken into account here as above.
853 auto Linkage = GlobalValue::LinkageTypes(RawFlags & 0xF); // 4 bits
854 RawFlags = RawFlags >> 4;
855 bool NotEligibleToImport = (RawFlags & 0x1) || Version < 3;
856 // The LiveRoot flag wasn't introduced until version 3. For dead stripping
857 // to work correctly on earlier versions, we must conservatively treat all
858 // values as live.
859 bool LiveRoot = (RawFlags & 0x2) || Version < 3;
860 return GlobalValueSummary::GVFlags(Linkage, NotEligibleToImport, LiveRoot);
861}
862
863static GlobalValue::VisibilityTypes getDecodedVisibility(unsigned Val) {
864 switch (Val) {
865 default: // Map unknown visibilities to default.
866 case 0: return GlobalValue::DefaultVisibility;
867 case 1: return GlobalValue::HiddenVisibility;
868 case 2: return GlobalValue::ProtectedVisibility;
869 }
870}
871
872static GlobalValue::DLLStorageClassTypes
873getDecodedDLLStorageClass(unsigned Val) {
874 switch (Val) {
875 default: // Map unknown values to default.
876 case 0: return GlobalValue::DefaultStorageClass;
877 case 1: return GlobalValue::DLLImportStorageClass;
878 case 2: return GlobalValue::DLLExportStorageClass;
879 }
880}
881
882static GlobalVariable::ThreadLocalMode getDecodedThreadLocalMode(unsigned Val) {
883 switch (Val) {
884 case 0: return GlobalVariable::NotThreadLocal;
885 default: // Map unknown non-zero value to general dynamic.
886 case 1: return GlobalVariable::GeneralDynamicTLSModel;
887 case 2: return GlobalVariable::LocalDynamicTLSModel;
888 case 3: return GlobalVariable::InitialExecTLSModel;
889 case 4: return GlobalVariable::LocalExecTLSModel;
890 }
891}
892
893static GlobalVariable::UnnamedAddr getDecodedUnnamedAddrType(unsigned Val) {
894 switch (Val) {
895 default: // Map unknown to UnnamedAddr::None.
896 case 0: return GlobalVariable::UnnamedAddr::None;
897 case 1: return GlobalVariable::UnnamedAddr::Global;
898 case 2: return GlobalVariable::UnnamedAddr::Local;
899 }
900}
901
902static int getDecodedCastOpcode(unsigned Val) {
903 switch (Val) {
904 default: return -1;
905 case bitc::CAST_TRUNC : return Instruction::Trunc;
906 case bitc::CAST_ZEXT : return Instruction::ZExt;
907 case bitc::CAST_SEXT : return Instruction::SExt;
908 case bitc::CAST_FPTOUI : return Instruction::FPToUI;
909 case bitc::CAST_FPTOSI : return Instruction::FPToSI;
910 case bitc::CAST_UITOFP : return Instruction::UIToFP;
911 case bitc::CAST_SITOFP : return Instruction::SIToFP;
912 case bitc::CAST_FPTRUNC : return Instruction::FPTrunc;
913 case bitc::CAST_FPEXT : return Instruction::FPExt;
914 case bitc::CAST_PTRTOINT: return Instruction::PtrToInt;
915 case bitc::CAST_INTTOPTR: return Instruction::IntToPtr;
916 case bitc::CAST_BITCAST : return Instruction::BitCast;
917 case bitc::CAST_ADDRSPACECAST: return Instruction::AddrSpaceCast;
918 }
919}
920
921static int getDecodedBinaryOpcode(unsigned Val, Type *Ty) {
922 bool IsFP = Ty->isFPOrFPVectorTy();
923 // BinOps are only valid for int/fp or vector of int/fp types
924 if (!IsFP && !Ty->isIntOrIntVectorTy())
925 return -1;
926
927 switch (Val) {
928 default:
929 return -1;
930 case bitc::BINOP_ADD:
931 return IsFP ? Instruction::FAdd : Instruction::Add;
932 case bitc::BINOP_SUB:
933 return IsFP ? Instruction::FSub : Instruction::Sub;
934 case bitc::BINOP_MUL:
935 return IsFP ? Instruction::FMul : Instruction::Mul;
936 case bitc::BINOP_UDIV:
937 return IsFP ? -1 : Instruction::UDiv;
938 case bitc::BINOP_SDIV:
939 return IsFP ? Instruction::FDiv : Instruction::SDiv;
940 case bitc::BINOP_UREM:
941 return IsFP ? -1 : Instruction::URem;
942 case bitc::BINOP_SREM:
943 return IsFP ? Instruction::FRem : Instruction::SRem;
944 case bitc::BINOP_SHL:
945 return IsFP ? -1 : Instruction::Shl;
946 case bitc::BINOP_LSHR:
947 return IsFP ? -1 : Instruction::LShr;
948 case bitc::BINOP_ASHR:
949 return IsFP ? -1 : Instruction::AShr;
950 case bitc::BINOP_AND:
951 return IsFP ? -1 : Instruction::And;
952 case bitc::BINOP_OR:
953 return IsFP ? -1 : Instruction::Or;
954 case bitc::BINOP_XOR:
955 return IsFP ? -1 : Instruction::Xor;
956 }
957}
958
959static AtomicRMWInst::BinOp getDecodedRMWOperation(unsigned Val) {
960 switch (Val) {
961 default: return AtomicRMWInst::BAD_BINOP;
962 case bitc::RMW_XCHG: return AtomicRMWInst::Xchg;
963 case bitc::RMW_ADD: return AtomicRMWInst::Add;
964 case bitc::RMW_SUB: return AtomicRMWInst::Sub;
965 case bitc::RMW_AND: return AtomicRMWInst::And;
966 case bitc::RMW_NAND: return AtomicRMWInst::Nand;
967 case bitc::RMW_OR: return AtomicRMWInst::Or;
968 case bitc::RMW_XOR: return AtomicRMWInst::Xor;
969 case bitc::RMW_MAX: return AtomicRMWInst::Max;
970 case bitc::RMW_MIN: return AtomicRMWInst::Min;
971 case bitc::RMW_UMAX: return AtomicRMWInst::UMax;
972 case bitc::RMW_UMIN: return AtomicRMWInst::UMin;
973 }
974}
975
976static AtomicOrdering getDecodedOrdering(unsigned Val) {
977 switch (Val) {
978 case bitc::ORDERING_NOTATOMIC: return AtomicOrdering::NotAtomic;
979 case bitc::ORDERING_UNORDERED: return AtomicOrdering::Unordered;
980 case bitc::ORDERING_MONOTONIC: return AtomicOrdering::Monotonic;
981 case bitc::ORDERING_ACQUIRE: return AtomicOrdering::Acquire;
982 case bitc::ORDERING_RELEASE: return AtomicOrdering::Release;
983 case bitc::ORDERING_ACQREL: return AtomicOrdering::AcquireRelease;
984 default: // Map unknown orderings to sequentially-consistent.
985 case bitc::ORDERING_SEQCST: return AtomicOrdering::SequentiallyConsistent;
986 }
987}
988
989static SynchronizationScope getDecodedSynchScope(unsigned Val) {
990 switch (Val) {
991 case bitc::SYNCHSCOPE_SINGLETHREAD: return SingleThread;
992 default: // Map unknown scopes to cross-thread.
993 case bitc::SYNCHSCOPE_CROSSTHREAD: return CrossThread;
994 }
995}
996
997static Comdat::SelectionKind getDecodedComdatSelectionKind(unsigned Val) {
998 switch (Val) {
999 default: // Map unknown selection kinds to any.
1000 case bitc::COMDAT_SELECTION_KIND_ANY:
1001 return Comdat::Any;
1002 case bitc::COMDAT_SELECTION_KIND_EXACT_MATCH:
1003 return Comdat::ExactMatch;
1004 case bitc::COMDAT_SELECTION_KIND_LARGEST:
1005 return Comdat::Largest;
1006 case bitc::COMDAT_SELECTION_KIND_NO_DUPLICATES:
1007 return Comdat::NoDuplicates;
1008 case bitc::COMDAT_SELECTION_KIND_SAME_SIZE:
1009 return Comdat::SameSize;
1010 }
1011}
1012
1013static FastMathFlags getDecodedFastMathFlags(unsigned Val) {
1014 FastMathFlags FMF;
1015 if (0 != (Val & FastMathFlags::UnsafeAlgebra))
1016 FMF.setUnsafeAlgebra();
1017 if (0 != (Val & FastMathFlags::NoNaNs))
1018 FMF.setNoNaNs();
1019 if (0 != (Val & FastMathFlags::NoInfs))
1020 FMF.setNoInfs();
1021 if (0 != (Val & FastMathFlags::NoSignedZeros))
1022 FMF.setNoSignedZeros();
1023 if (0 != (Val & FastMathFlags::AllowReciprocal))
1024 FMF.setAllowReciprocal();
1025 if (0 != (Val & FastMathFlags::AllowContract))
1026 FMF.setAllowContract(true);
1027 return FMF;
1028}
1029
1030static void upgradeDLLImportExportLinkage(GlobalValue *GV, unsigned Val) {
1031 switch (Val) {
1032 case 5: GV->setDLLStorageClass(GlobalValue::DLLImportStorageClass); break;
1033 case 6: GV->setDLLStorageClass(GlobalValue::DLLExportStorageClass); break;
1034 }
1035}
1036
1037
1038Type *BitcodeReader::getTypeByID(unsigned ID) {
1039 // The type table size is always specified correctly.
1040 if (ID >= TypeList.size())
1041 return nullptr;
1042
1043 if (Type *Ty = TypeList[ID])
1044 return Ty;
1045
1046 // If we have a forward reference, the only possible case is when it is to a
1047 // named struct. Just create a placeholder for now.
1048 return TypeList[ID] = createIdentifiedStructType(Context);
1049}
1050
1051StructType *BitcodeReader::createIdentifiedStructType(LLVMContext &Context,
1052 StringRef Name) {
1053 auto *Ret = StructType::create(Context, Name);
1054 IdentifiedStructTypes.push_back(Ret);
1055 return Ret;
1056}
1057
1058StructType *BitcodeReader::createIdentifiedStructType(LLVMContext &Context) {
1059 auto *Ret = StructType::create(Context);
1060 IdentifiedStructTypes.push_back(Ret);
1061 return Ret;
1062}
1063
1064//===----------------------------------------------------------------------===//
1065// Functions for parsing blocks from the bitcode file
1066//===----------------------------------------------------------------------===//
1067
1068static uint64_t getRawAttributeMask(Attribute::AttrKind Val) {
1069 switch (Val) {
1070 case Attribute::EndAttrKinds:
1071 llvm_unreachable("Synthetic enumerators which should never get here")::llvm::llvm_unreachable_internal("Synthetic enumerators which should never get here"
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301769/lib/Bitcode/Reader/BitcodeReader.cpp"
, 1071)
;
1072
1073 case Attribute::None: return 0;
1074 case Attribute::ZExt: return 1 << 0;
1075 case Attribute::SExt: return 1 << 1;
1076 case Attribute::NoReturn: return 1 << 2;
1077 case Attribute::InReg: return 1 << 3;
1078 case Attribute::StructRet: return 1 << 4;
1079 case Attribute::NoUnwind: return 1 << 5;
1080 case Attribute::NoAlias: return 1 << 6;
1081 case Attribute::ByVal: return 1 << 7;
1082 case Attribute::Nest: return 1 << 8;
1083 case Attribute::ReadNone: return 1 << 9;
1084 case Attribute::ReadOnly: return 1 << 10;
1085 case Attribute::NoInline: return 1 << 11;
1086 case Attribute::AlwaysInline: return 1 << 12;
1087 case Attribute::OptimizeForSize: return 1 << 13;
1088 case Attribute::StackProtect: return 1 << 14;
1089 case Attribute::StackProtectReq: return 1 << 15;
1090 case Attribute::Alignment: return 31 << 16;
1091 case Attribute::NoCapture: return 1 << 21;
1092 case Attribute::NoRedZone: return 1 << 22;
1093 case Attribute::NoImplicitFloat: return 1 << 23;
1094 case Attribute::Naked: return 1 << 24;
1095 case Attribute::InlineHint: return 1 << 25;
1096 case Attribute::StackAlignment: return 7 << 26;
1097 case Attribute::ReturnsTwice: return 1 << 29;
1098 case Attribute::UWTable: return 1 << 30;
1099 case Attribute::NonLazyBind: return 1U << 31;
1100 case Attribute::SanitizeAddress: return 1ULL << 32;
1101 case Attribute::MinSize: return 1ULL << 33;
1102 case Attribute::NoDuplicate: return 1ULL << 34;
1103 case Attribute::StackProtectStrong: return 1ULL << 35;
1104 case Attribute::SanitizeThread: return 1ULL << 36;
1105 case Attribute::SanitizeMemory: return 1ULL << 37;
1106 case Attribute::NoBuiltin: return 1ULL << 38;
1107 case Attribute::Returned: return 1ULL << 39;
1108 case Attribute::Cold: return 1ULL << 40;
1109 case Attribute::Builtin: return 1ULL << 41;
1110 case Attribute::OptimizeNone: return 1ULL << 42;
1111 case Attribute::InAlloca: return 1ULL << 43;
1112 case Attribute::NonNull: return 1ULL << 44;
1113 case Attribute::JumpTable: return 1ULL << 45;
1114 case Attribute::Convergent: return 1ULL << 46;
1115 case Attribute::SafeStack: return 1ULL << 47;
1116 case Attribute::NoRecurse: return 1ULL << 48;
1117 case Attribute::InaccessibleMemOnly: return 1ULL << 49;
1118 case Attribute::InaccessibleMemOrArgMemOnly: return 1ULL << 50;
1119 case Attribute::SwiftSelf: return 1ULL << 51;
1120 case Attribute::SwiftError: return 1ULL << 52;
1121 case Attribute::WriteOnly: return 1ULL << 53;
1122 case Attribute::Speculatable: return 1ULL << 54;
1123 case Attribute::Dereferenceable:
1124 llvm_unreachable("dereferenceable attribute not supported in raw format")::llvm::llvm_unreachable_internal("dereferenceable attribute not supported in raw format"
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301769/lib/Bitcode/Reader/BitcodeReader.cpp"
, 1124)
;
1125 break;
1126 case Attribute::DereferenceableOrNull:
1127 llvm_unreachable("dereferenceable_or_null attribute not supported in raw "::llvm::llvm_unreachable_internal("dereferenceable_or_null attribute not supported in raw "
"format", "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301769/lib/Bitcode/Reader/BitcodeReader.cpp"
, 1128)
1128 "format")::llvm::llvm_unreachable_internal("dereferenceable_or_null attribute not supported in raw "
"format", "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301769/lib/Bitcode/Reader/BitcodeReader.cpp"
, 1128)
;
1129 break;
1130 case Attribute::ArgMemOnly:
1131 llvm_unreachable("argmemonly attribute not supported in raw format")::llvm::llvm_unreachable_internal("argmemonly attribute not supported in raw format"
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301769/lib/Bitcode/Reader/BitcodeReader.cpp"
, 1131)
;
1132 break;
1133 case Attribute::AllocSize:
1134 llvm_unreachable("allocsize not supported in raw format")::llvm::llvm_unreachable_internal("allocsize not supported in raw format"
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301769/lib/Bitcode/Reader/BitcodeReader.cpp"
, 1134)
;
1135 break;
1136 }
1137 llvm_unreachable("Unsupported attribute type")::llvm::llvm_unreachable_internal("Unsupported attribute type"
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301769/lib/Bitcode/Reader/BitcodeReader.cpp"
, 1137)
;
1138}
1139
1140static void addRawAttributeValue(AttrBuilder &B, uint64_t Val) {
1141 if (!Val) return;
1142
1143 for (Attribute::AttrKind I = Attribute::None; I != Attribute::EndAttrKinds;
1144 I = Attribute::AttrKind(I + 1)) {
1145 if (I == Attribute::Dereferenceable ||
1146 I == Attribute::DereferenceableOrNull ||
1147 I == Attribute::ArgMemOnly ||
1148 I == Attribute::AllocSize)
1149 continue;
1150 if (uint64_t A = (Val & getRawAttributeMask(I))) {
1151 if (I == Attribute::Alignment)
1152 B.addAlignmentAttr(1ULL << ((A >> 16) - 1));
1153 else if (I == Attribute::StackAlignment)
1154 B.addStackAlignmentAttr(1ULL << ((A >> 26)-1));
1155 else
1156 B.addAttribute(I);
1157 }
1158 }
1159}
1160
1161/// \brief This fills an AttrBuilder object with the LLVM attributes that have
1162/// been decoded from the given integer. This function must stay in sync with
1163/// 'encodeLLVMAttributesForBitcode'.
1164static void decodeLLVMAttributesForBitcode(AttrBuilder &B,
1165 uint64_t EncodedAttrs) {
1166 // FIXME: Remove in 4.0.
1167
1168 // The alignment is stored as a 16-bit raw value from bits 31--16. We shift
1169 // the bits above 31 down by 11 bits.
1170 unsigned Alignment = (EncodedAttrs & (0xffffULL << 16)) >> 16;
1171 assert((!Alignment || isPowerOf2_32(Alignment)) &&(((!Alignment || isPowerOf2_32(Alignment)) && "Alignment must be a power of two."
) ? static_cast<void> (0) : __assert_fail ("(!Alignment || isPowerOf2_32(Alignment)) && \"Alignment must be a power of two.\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301769/lib/Bitcode/Reader/BitcodeReader.cpp"
, 1172, __PRETTY_FUNCTION__))
1172 "Alignment must be a power of two.")(((!Alignment || isPowerOf2_32(Alignment)) && "Alignment must be a power of two."
) ? static_cast<void> (0) : __assert_fail ("(!Alignment || isPowerOf2_32(Alignment)) && \"Alignment must be a power of two.\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301769/lib/Bitcode/Reader/BitcodeReader.cpp"
, 1172, __PRETTY_FUNCTION__))
;
1173
1174 if (Alignment)
1175 B.addAlignmentAttr(Alignment);
1176 addRawAttributeValue(B, ((EncodedAttrs & (0xfffffULL << 32)) >> 11) |
1177 (EncodedAttrs & 0xffff));
1178}
1179
1180Error BitcodeReader::parseAttributeBlock() {
1181 if (Stream.EnterSubBlock(bitc::PARAMATTR_BLOCK_ID))
1182 return error("Invalid record");
1183
1184 if (!MAttributes.empty())
1185 return error("Invalid multiple blocks");
1186
1187 SmallVector<uint64_t, 64> Record;
1188
1189 SmallVector<AttributeList, 8> Attrs;
1190
1191 // Read all the records.
1192 while (true) {
1193 BitstreamEntry Entry = Stream.advanceSkippingSubblocks();
1194
1195 switch (Entry.Kind) {
1196 case BitstreamEntry::SubBlock: // Handled for us already.
1197 case BitstreamEntry::Error:
1198 return error("Malformed block");
1199 case BitstreamEntry::EndBlock:
1200 return Error::success();
1201 case BitstreamEntry::Record:
1202 // The interesting case.
1203 break;
1204 }
1205
1206 // Read a record.
1207 Record.clear();
1208 switch (Stream.readRecord(Entry.ID, Record)) {
1209 default: // Default behavior: ignore.
1210 break;
1211 case bitc::PARAMATTR_CODE_ENTRY_OLD: { // ENTRY: [paramidx0, attr0, ...]
1212 // FIXME: Remove in 4.0.
1213 if (Record.size() & 1)
1214 return error("Invalid record");
1215
1216 for (unsigned i = 0, e = Record.size(); i != e; i += 2) {
1217 AttrBuilder B;
1218 decodeLLVMAttributesForBitcode(B, Record[i+1]);
1219 Attrs.push_back(AttributeList::get(Context, Record[i], B));
1220 }
1221
1222 MAttributes.push_back(AttributeList::get(Context, Attrs));
1223 Attrs.clear();
1224 break;
1225 }
1226 case bitc::PARAMATTR_CODE_ENTRY: { // ENTRY: [attrgrp0, attrgrp1, ...]
1227 for (unsigned i = 0, e = Record.size(); i != e; ++i)
1228 Attrs.push_back(MAttributeGroups[Record[i]]);
1229
1230 MAttributes.push_back(AttributeList::get(Context, Attrs));
1231 Attrs.clear();
1232 break;
1233 }
1234 }
1235 }
1236}
1237
1238// Returns Attribute::None on unrecognized codes.
1239static Attribute::AttrKind getAttrFromCode(uint64_t Code) {
1240 switch (Code) {
1241 default:
1242 return Attribute::None;
1243 case bitc::ATTR_KIND_ALIGNMENT:
1244 return Attribute::Alignment;
1245 case bitc::ATTR_KIND_ALWAYS_INLINE:
1246 return Attribute::AlwaysInline;
1247 case bitc::ATTR_KIND_ARGMEMONLY:
1248 return Attribute::ArgMemOnly;
1249 case bitc::ATTR_KIND_BUILTIN:
1250 return Attribute::Builtin;
1251 case bitc::ATTR_KIND_BY_VAL:
1252 return Attribute::ByVal;
1253 case bitc::ATTR_KIND_IN_ALLOCA:
1254 return Attribute::InAlloca;
1255 case bitc::ATTR_KIND_COLD:
1256 return Attribute::Cold;
1257 case bitc::ATTR_KIND_CONVERGENT:
1258 return Attribute::Convergent;
1259 case bitc::ATTR_KIND_INACCESSIBLEMEM_ONLY:
1260 return Attribute::InaccessibleMemOnly;
1261 case bitc::ATTR_KIND_INACCESSIBLEMEM_OR_ARGMEMONLY:
1262 return Attribute::InaccessibleMemOrArgMemOnly;
1263 case bitc::ATTR_KIND_INLINE_HINT:
1264 return Attribute::InlineHint;
1265 case bitc::ATTR_KIND_IN_REG:
1266 return Attribute::InReg;
1267 case bitc::ATTR_KIND_JUMP_TABLE:
1268 return Attribute::JumpTable;
1269 case bitc::ATTR_KIND_MIN_SIZE:
1270 return Attribute::MinSize;
1271 case bitc::ATTR_KIND_NAKED:
1272 return Attribute::Naked;
1273 case bitc::ATTR_KIND_NEST:
1274 return Attribute::Nest;
1275 case bitc::ATTR_KIND_NO_ALIAS:
1276 return Attribute::NoAlias;
1277 case bitc::ATTR_KIND_NO_BUILTIN:
1278 return Attribute::NoBuiltin;
1279 case bitc::ATTR_KIND_NO_CAPTURE:
1280 return Attribute::NoCapture;
1281 case bitc::ATTR_KIND_NO_DUPLICATE:
1282 return Attribute::NoDuplicate;
1283 case bitc::ATTR_KIND_NO_IMPLICIT_FLOAT:
1284 return Attribute::NoImplicitFloat;
1285 case bitc::ATTR_KIND_NO_INLINE:
1286 return Attribute::NoInline;
1287 case bitc::ATTR_KIND_NO_RECURSE:
1288 return Attribute::NoRecurse;
1289 case bitc::ATTR_KIND_NON_LAZY_BIND:
1290 return Attribute::NonLazyBind;
1291 case bitc::ATTR_KIND_NON_NULL:
1292 return Attribute::NonNull;
1293 case bitc::ATTR_KIND_DEREFERENCEABLE:
1294 return Attribute::Dereferenceable;
1295 case bitc::ATTR_KIND_DEREFERENCEABLE_OR_NULL:
1296 return Attribute::DereferenceableOrNull;
1297 case bitc::ATTR_KIND_ALLOC_SIZE:
1298 return Attribute::AllocSize;
1299 case bitc::ATTR_KIND_NO_RED_ZONE:
1300 return Attribute::NoRedZone;
1301 case bitc::ATTR_KIND_NO_RETURN:
1302 return Attribute::NoReturn;
1303 case bitc::ATTR_KIND_NO_UNWIND:
1304 return Attribute::NoUnwind;
1305 case bitc::ATTR_KIND_OPTIMIZE_FOR_SIZE:
1306 return Attribute::OptimizeForSize;
1307 case bitc::ATTR_KIND_OPTIMIZE_NONE:
1308 return Attribute::OptimizeNone;
1309 case bitc::ATTR_KIND_READ_NONE:
1310 return Attribute::ReadNone;
1311 case bitc::ATTR_KIND_READ_ONLY:
1312 return Attribute::ReadOnly;
1313 case bitc::ATTR_KIND_RETURNED:
1314 return Attribute::Returned;
1315 case bitc::ATTR_KIND_RETURNS_TWICE:
1316 return Attribute::ReturnsTwice;
1317 case bitc::ATTR_KIND_S_EXT:
1318 return Attribute::SExt;
1319 case bitc::ATTR_KIND_SPECULATABLE:
1320 return Attribute::Speculatable;
1321 case bitc::ATTR_KIND_STACK_ALIGNMENT:
1322 return Attribute::StackAlignment;
1323 case bitc::ATTR_KIND_STACK_PROTECT:
1324 return Attribute::StackProtect;
1325 case bitc::ATTR_KIND_STACK_PROTECT_REQ:
1326 return Attribute::StackProtectReq;
1327 case bitc::ATTR_KIND_STACK_PROTECT_STRONG:
1328 return Attribute::StackProtectStrong;
1329 case bitc::ATTR_KIND_SAFESTACK:
1330 return Attribute::SafeStack;
1331 case bitc::ATTR_KIND_STRUCT_RET:
1332 return Attribute::StructRet;
1333 case bitc::ATTR_KIND_SANITIZE_ADDRESS:
1334 return Attribute::SanitizeAddress;
1335 case bitc::ATTR_KIND_SANITIZE_THREAD:
1336 return Attribute::SanitizeThread;
1337 case bitc::ATTR_KIND_SANITIZE_MEMORY:
1338 return Attribute::SanitizeMemory;
1339 case bitc::ATTR_KIND_SWIFT_ERROR:
1340 return Attribute::SwiftError;
1341 case bitc::ATTR_KIND_SWIFT_SELF:
1342 return Attribute::SwiftSelf;
1343 case bitc::ATTR_KIND_UW_TABLE:
1344 return Attribute::UWTable;
1345 case bitc::ATTR_KIND_WRITEONLY:
1346 return Attribute::WriteOnly;
1347 case bitc::ATTR_KIND_Z_EXT:
1348 return Attribute::ZExt;
1349 }
1350}
1351
1352Error BitcodeReader::parseAlignmentValue(uint64_t Exponent,
1353 unsigned &Alignment) {
1354 // Note: Alignment in bitcode files is incremented by 1, so that zero
1355 // can be used for default alignment.
1356 if (Exponent > Value::MaxAlignmentExponent + 1)
1357 return error("Invalid alignment value");
1358 Alignment = (1 << static_cast<unsigned>(Exponent)) >> 1;
1359 return Error::success();
1360}
1361
1362Error BitcodeReader::parseAttrKind(uint64_t Code, Attribute::AttrKind *Kind) {
1363 *Kind = getAttrFromCode(Code);
1364 if (*Kind == Attribute::None)
1365 return error("Unknown attribute kind (" + Twine(Code) + ")");
1366 return Error::success();
1367}
1368
1369Error BitcodeReader::parseAttributeGroupBlock() {
1370 if (Stream.EnterSubBlock(bitc::PARAMATTR_GROUP_BLOCK_ID))
1371 return error("Invalid record");
1372
1373 if (!MAttributeGroups.empty())
1374 return error("Invalid multiple blocks");
1375
1376 SmallVector<uint64_t, 64> Record;
1377
1378 // Read all the records.
1379 while (true) {
1380 BitstreamEntry Entry = Stream.advanceSkippingSubblocks();
1381
1382 switch (Entry.Kind) {
1383 case BitstreamEntry::SubBlock: // Handled for us already.
1384 case BitstreamEntry::Error:
1385 return error("Malformed block");
1386 case BitstreamEntry::EndBlock:
1387 return Error::success();
1388 case BitstreamEntry::Record:
1389 // The interesting case.
1390 break;
1391 }
1392
1393 // Read a record.
1394 Record.clear();
1395 switch (Stream.readRecord(Entry.ID, Record)) {
1396 default: // Default behavior: ignore.
1397 break;
1398 case bitc::PARAMATTR_GRP_CODE_ENTRY: { // ENTRY: [grpid, idx, a0, a1, ...]
1399 if (Record.size() < 3)
1400 return error("Invalid record");
1401
1402 uint64_t GrpID = Record[0];
1403 uint64_t Idx = Record[1]; // Index of the object this attribute refers to.
1404
1405 AttrBuilder B;
1406 for (unsigned i = 2, e = Record.size(); i != e; ++i) {
1407 if (Record[i] == 0) { // Enum attribute
1408 Attribute::AttrKind Kind;
1409 if (Error Err = parseAttrKind(Record[++i], &Kind))
1410 return Err;
1411
1412 B.addAttribute(Kind);
1413 } else if (Record[i] == 1) { // Integer attribute
1414 Attribute::AttrKind Kind;
1415 if (Error Err = parseAttrKind(Record[++i], &Kind))
1416 return Err;
1417 if (Kind == Attribute::Alignment)
1418 B.addAlignmentAttr(Record[++i]);
1419 else if (Kind == Attribute::StackAlignment)
1420 B.addStackAlignmentAttr(Record[++i]);
1421 else if (Kind == Attribute::Dereferenceable)
1422 B.addDereferenceableAttr(Record[++i]);
1423 else if (Kind == Attribute::DereferenceableOrNull)
1424 B.addDereferenceableOrNullAttr(Record[++i]);
1425 else if (Kind == Attribute::AllocSize)
1426 B.addAllocSizeAttrFromRawRepr(Record[++i]);
1427 } else { // String attribute
1428 assert((Record[i] == 3 || Record[i] == 4) &&(((Record[i] == 3 || Record[i] == 4) && "Invalid attribute group entry"
) ? static_cast<void> (0) : __assert_fail ("(Record[i] == 3 || Record[i] == 4) && \"Invalid attribute group entry\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301769/lib/Bitcode/Reader/BitcodeReader.cpp"
, 1429, __PRETTY_FUNCTION__))
1429 "Invalid attribute group entry")(((Record[i] == 3 || Record[i] == 4) && "Invalid attribute group entry"
) ? static_cast<void> (0) : __assert_fail ("(Record[i] == 3 || Record[i] == 4) && \"Invalid attribute group entry\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301769/lib/Bitcode/Reader/BitcodeReader.cpp"
, 1429, __PRETTY_FUNCTION__))
;
1430 bool HasValue = (Record[i++] == 4);
1431 SmallString<64> KindStr;
1432 SmallString<64> ValStr;
1433
1434 while (Record[i] != 0 && i != e)
1435 KindStr += Record[i++];
1436 assert(Record[i] == 0 && "Kind string not null terminated")((Record[i] == 0 && "Kind string not null terminated"
) ? static_cast<void> (0) : __assert_fail ("Record[i] == 0 && \"Kind string not null terminated\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301769/lib/Bitcode/Reader/BitcodeReader.cpp"
, 1436, __PRETTY_FUNCTION__))
;
1437
1438 if (HasValue) {
1439 // Has a value associated with it.
1440 ++i; // Skip the '0' that terminates the "kind" string.
1441 while (Record[i] != 0 && i != e)
1442 ValStr += Record[i++];
1443 assert(Record[i] == 0 && "Value string not null terminated")((Record[i] == 0 && "Value string not null terminated"
) ? static_cast<void> (0) : __assert_fail ("Record[i] == 0 && \"Value string not null terminated\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301769/lib/Bitcode/Reader/BitcodeReader.cpp"
, 1443, __PRETTY_FUNCTION__))
;
1444 }
1445
1446 B.addAttribute(KindStr.str(), ValStr.str());
1447 }
1448 }
1449
1450 MAttributeGroups[GrpID] = AttributeList::get(Context, Idx, B);
1451 break;
1452 }
1453 }
1454 }
1455}
1456
1457Error BitcodeReader::parseTypeTable() {
1458 if (Stream.EnterSubBlock(bitc::TYPE_BLOCK_ID_NEW))
1459 return error("Invalid record");
1460
1461 return parseTypeTableBody();
1462}
1463
1464Error BitcodeReader::parseTypeTableBody() {
1465 if (!TypeList.empty())
1466 return error("Invalid multiple blocks");
1467
1468 SmallVector<uint64_t, 64> Record;
1469 unsigned NumRecords = 0;
1470
1471 SmallString<64> TypeName;
1472
1473 // Read all the records for this type table.
1474 while (true) {
1475 BitstreamEntry Entry = Stream.advanceSkippingSubblocks();
1476
1477 switch (Entry.Kind) {
1478 case BitstreamEntry::SubBlock: // Handled for us already.
1479 case BitstreamEntry::Error:
1480 return error("Malformed block");
1481 case BitstreamEntry::EndBlock:
1482 if (NumRecords != TypeList.size())
1483 return error("Malformed block");
1484 return Error::success();
1485 case BitstreamEntry::Record:
1486 // The interesting case.
1487 break;
1488 }
1489
1490 // Read a record.
1491 Record.clear();
1492 Type *ResultTy = nullptr;
1493 switch (Stream.readRecord(Entry.ID, Record)) {
1494 default:
1495 return error("Invalid value");
1496 case bitc::TYPE_CODE_NUMENTRY: // TYPE_CODE_NUMENTRY: [numentries]
1497 // TYPE_CODE_NUMENTRY contains a count of the number of types in the
1498 // type list. This allows us to reserve space.
1499 if (Record.size() < 1)
1500 return error("Invalid record");
1501 TypeList.resize(Record[0]);
1502 continue;
1503 case bitc::TYPE_CODE_VOID: // VOID
1504 ResultTy = Type::getVoidTy(Context);
1505 break;
1506 case bitc::TYPE_CODE_HALF: // HALF
1507 ResultTy = Type::getHalfTy(Context);
1508 break;
1509 case bitc::TYPE_CODE_FLOAT: // FLOAT
1510 ResultTy = Type::getFloatTy(Context);
1511 break;
1512 case bitc::TYPE_CODE_DOUBLE: // DOUBLE
1513 ResultTy = Type::getDoubleTy(Context);
1514 break;
1515 case bitc::TYPE_CODE_X86_FP80: // X86_FP80
1516 ResultTy = Type::getX86_FP80Ty(Context);
1517 break;
1518 case bitc::TYPE_CODE_FP128: // FP128
1519 ResultTy = Type::getFP128Ty(Context);
1520 break;
1521 case bitc::TYPE_CODE_PPC_FP128: // PPC_FP128
1522 ResultTy = Type::getPPC_FP128Ty(Context);
1523 break;
1524 case bitc::TYPE_CODE_LABEL: // LABEL
1525 ResultTy = Type::getLabelTy(Context);
1526 break;
1527 case bitc::TYPE_CODE_METADATA: // METADATA
1528 ResultTy = Type::getMetadataTy(Context);
1529 break;
1530 case bitc::TYPE_CODE_X86_MMX: // X86_MMX
1531 ResultTy = Type::getX86_MMXTy(Context);
1532 break;
1533 case bitc::TYPE_CODE_TOKEN: // TOKEN
1534 ResultTy = Type::getTokenTy(Context);
1535 break;
1536 case bitc::TYPE_CODE_INTEGER: { // INTEGER: [width]
1537 if (Record.size() < 1)
1538 return error("Invalid record");
1539
1540 uint64_t NumBits = Record[0];
1541 if (NumBits < IntegerType::MIN_INT_BITS ||
1542 NumBits > IntegerType::MAX_INT_BITS)
1543 return error("Bitwidth for integer type out of range");
1544 ResultTy = IntegerType::get(Context, NumBits);
1545 break;
1546 }
1547 case bitc::TYPE_CODE_POINTER: { // POINTER: [pointee type] or
1548 // [pointee type, address space]
1549 if (Record.size() < 1)
1550 return error("Invalid record");
1551 unsigned AddressSpace = 0;
1552 if (Record.size() == 2)
1553 AddressSpace = Record[1];
1554 ResultTy = getTypeByID(Record[0]);
1555 if (!ResultTy ||
1556 !PointerType::isValidElementType(ResultTy))
1557 return error("Invalid type");
1558 ResultTy = PointerType::get(ResultTy, AddressSpace);
1559 break;
1560 }
1561 case bitc::TYPE_CODE_FUNCTION_OLD: {
1562 // FIXME: attrid is dead, remove it in LLVM 4.0
1563 // FUNCTION: [vararg, attrid, retty, paramty x N]
1564 if (Record.size() < 3)
1565 return error("Invalid record");
1566 SmallVector<Type*, 8> ArgTys;
1567 for (unsigned i = 3, e = Record.size(); i != e; ++i) {
1568 if (Type *T = getTypeByID(Record[i]))
1569 ArgTys.push_back(T);
1570 else
1571 break;
1572 }
1573
1574 ResultTy = getTypeByID(Record[2]);
1575 if (!ResultTy || ArgTys.size() < Record.size()-3)
1576 return error("Invalid type");
1577
1578 ResultTy = FunctionType::get(ResultTy, ArgTys, Record[0]);
1579 break;
1580 }
1581 case bitc::TYPE_CODE_FUNCTION: {
1582 // FUNCTION: [vararg, retty, paramty x N]
1583 if (Record.size() < 2)
1584 return error("Invalid record");
1585 SmallVector<Type*, 8> ArgTys;
1586 for (unsigned i = 2, e = Record.size(); i != e; ++i) {
1587 if (Type *T = getTypeByID(Record[i])) {
1588 if (!FunctionType::isValidArgumentType(T))
1589 return error("Invalid function argument type");
1590 ArgTys.push_back(T);
1591 }
1592 else
1593 break;
1594 }
1595
1596 ResultTy = getTypeByID(Record[1]);
1597 if (!ResultTy || ArgTys.size() < Record.size()-2)
1598 return error("Invalid type");
1599
1600 ResultTy = FunctionType::get(ResultTy, ArgTys, Record[0]);
1601 break;
1602 }
1603 case bitc::TYPE_CODE_STRUCT_ANON: { // STRUCT: [ispacked, eltty x N]
1604 if (Record.size() < 1)
1605 return error("Invalid record");
1606 SmallVector<Type*, 8> EltTys;
1607 for (unsigned i = 1, e = Record.size(); i != e; ++i) {
1608 if (Type *T = getTypeByID(Record[i]))
1609 EltTys.push_back(T);
1610 else
1611 break;
1612 }
1613 if (EltTys.size() != Record.size()-1)
1614 return error("Invalid type");
1615 ResultTy = StructType::get(Context, EltTys, Record[0]);
1616 break;
1617 }
1618 case bitc::TYPE_CODE_STRUCT_NAME: // STRUCT_NAME: [strchr x N]
1619 if (convertToString(Record, 0, TypeName))
1620 return error("Invalid record");
1621 continue;
1622
1623 case bitc::TYPE_CODE_STRUCT_NAMED: { // STRUCT: [ispacked, eltty x N]
1624 if (Record.size() < 1)
1625 return error("Invalid record");
1626
1627 if (NumRecords >= TypeList.size())
1628 return error("Invalid TYPE table");
1629
1630 // Check to see if this was forward referenced, if so fill in the temp.
1631 StructType *Res = cast_or_null<StructType>(TypeList[NumRecords]);
1632 if (Res) {
1633 Res->setName(TypeName);
1634 TypeList[NumRecords] = nullptr;
1635 } else // Otherwise, create a new struct.
1636 Res = createIdentifiedStructType(Context, TypeName);
1637 TypeName.clear();
1638
1639 SmallVector<Type*, 8> EltTys;
1640 for (unsigned i = 1, e = Record.size(); i != e; ++i) {
1641 if (Type *T = getTypeByID(Record[i]))
1642 EltTys.push_back(T);
1643 else
1644 break;
1645 }
1646 if (EltTys.size() != Record.size()-1)
1647 return error("Invalid record");
1648 Res->setBody(EltTys, Record[0]);
1649 ResultTy = Res;
1650 break;
1651 }
1652 case bitc::TYPE_CODE_OPAQUE: { // OPAQUE: []
1653 if (Record.size() != 1)
1654 return error("Invalid record");
1655
1656 if (NumRecords >= TypeList.size())
1657 return error("Invalid TYPE table");
1658
1659 // Check to see if this was forward referenced, if so fill in the temp.
1660 StructType *Res = cast_or_null<StructType>(TypeList[NumRecords]);
1661 if (Res) {
1662 Res->setName(TypeName);
1663 TypeList[NumRecords] = nullptr;
1664 } else // Otherwise, create a new struct with no body.
1665 Res = createIdentifiedStructType(Context, TypeName);
1666 TypeName.clear();
1667 ResultTy = Res;
1668 break;
1669 }
1670 case bitc::TYPE_CODE_ARRAY: // ARRAY: [numelts, eltty]
1671 if (Record.size() < 2)
1672 return error("Invalid record");
1673 ResultTy = getTypeByID(Record[1]);
1674 if (!ResultTy || !ArrayType::isValidElementType(ResultTy))
1675 return error("Invalid type");
1676 ResultTy = ArrayType::get(ResultTy, Record[0]);
1677 break;
1678 case bitc::TYPE_CODE_VECTOR: // VECTOR: [numelts, eltty]
1679 if (Record.size() < 2)
1680 return error("Invalid record");
1681 if (Record[0] == 0)
1682 return error("Invalid vector length");
1683 ResultTy = getTypeByID(Record[1]);
1684 if (!ResultTy || !StructType::isValidElementType(ResultTy))
1685 return error("Invalid type");
1686 ResultTy = VectorType::get(ResultTy, Record[0]);
1687 break;
1688 }
1689
1690 if (NumRecords >= TypeList.size())
1691 return error("Invalid TYPE table");
1692 if (TypeList[NumRecords])
1693 return error(
1694 "Invalid TYPE table: Only named structs can be forward referenced");
1695 assert(ResultTy && "Didn't read a type?")((ResultTy && "Didn't read a type?") ? static_cast<
void> (0) : __assert_fail ("ResultTy && \"Didn't read a type?\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301769/lib/Bitcode/Reader/BitcodeReader.cpp"
, 1695, __PRETTY_FUNCTION__))
;
1696 TypeList[NumRecords++] = ResultTy;
1697 }
1698}
1699
1700Error BitcodeReader::parseOperandBundleTags() {
1701 if (Stream.EnterSubBlock(bitc::OPERAND_BUNDLE_TAGS_BLOCK_ID))
1702 return error("Invalid record");
1703
1704 if (!BundleTags.empty())
1705 return error("Invalid multiple blocks");
1706
1707 SmallVector<uint64_t, 64> Record;
1708
1709 while (true) {
1710 BitstreamEntry Entry = Stream.advanceSkippingSubblocks();
1711
1712 switch (Entry.Kind) {
1713 case BitstreamEntry::SubBlock: // Handled for us already.
1714 case BitstreamEntry::Error:
1715 return error("Malformed block");
1716 case BitstreamEntry::EndBlock:
1717 return Error::success();
1718 case BitstreamEntry::Record:
1719 // The interesting case.
1720 break;
1721 }
1722
1723 // Tags are implicitly mapped to integers by their order.
1724
1725 if (Stream.readRecord(Entry.ID, Record) != bitc::OPERAND_BUNDLE_TAG)
1726 return error("Invalid record");
1727
1728 // OPERAND_BUNDLE_TAG: [strchr x N]
1729 BundleTags.emplace_back();
1730 if (convertToString(Record, 0, BundleTags.back()))
1731 return error("Invalid record");
1732 Record.clear();
1733 }
1734}
1735
1736/// Associate a value with its name from the given index in the provided record.
1737Expected<Value *> BitcodeReader::recordValue(SmallVectorImpl<uint64_t> &Record,
1738 unsigned NameIndex, Triple &TT) {
1739 SmallString<128> ValueName;
1740 if (convertToString(Record, NameIndex, ValueName))
1741 return error("Invalid record");
1742 unsigned ValueID = Record[0];
1743 if (ValueID >= ValueList.size() || !ValueList[ValueID])
1744 return error("Invalid record");
1745 Value *V = ValueList[ValueID];
1746
1747 StringRef NameStr(ValueName.data(), ValueName.size());
1748 if (NameStr.find_first_of(0) != StringRef::npos)
1749 return error("Invalid value name");
1750 V->setName(NameStr);
1751 auto *GO = dyn_cast<GlobalObject>(V);
1752 if (GO) {
1753 if (GO->getComdat() == reinterpret_cast<Comdat *>(1)) {
1754 if (TT.isOSBinFormatMachO())
1755 GO->setComdat(nullptr);
1756 else
1757 GO->setComdat(TheModule->getOrInsertComdat(V->getName()));
1758 }
1759 }
1760 return V;
1761}
1762
1763/// Helper to note and return the current location, and jump to the given
1764/// offset.
1765static uint64_t jumpToValueSymbolTable(uint64_t Offset,
1766 BitstreamCursor &Stream) {
1767 // Save the current parsing location so we can jump back at the end
1768 // of the VST read.
1769 uint64_t CurrentBit = Stream.GetCurrentBitNo();
1770 Stream.JumpToBit(Offset * 32);
1771#ifndef NDEBUG
1772 // Do some checking if we are in debug mode.
1773 BitstreamEntry Entry = Stream.advance();
1774 assert(Entry.Kind == BitstreamEntry::SubBlock)((Entry.Kind == BitstreamEntry::SubBlock) ? static_cast<void
> (0) : __assert_fail ("Entry.Kind == BitstreamEntry::SubBlock"
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301769/lib/Bitcode/Reader/BitcodeReader.cpp"
, 1774, __PRETTY_FUNCTION__))
;
1775 assert(Entry.ID == bitc::VALUE_SYMTAB_BLOCK_ID)((Entry.ID == bitc::VALUE_SYMTAB_BLOCK_ID) ? static_cast<void
> (0) : __assert_fail ("Entry.ID == bitc::VALUE_SYMTAB_BLOCK_ID"
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301769/lib/Bitcode/Reader/BitcodeReader.cpp"
, 1775, __PRETTY_FUNCTION__))
;
1776#else
1777 // In NDEBUG mode ignore the output so we don't get an unused variable
1778 // warning.
1779 Stream.advance();
1780#endif
1781 return CurrentBit;
1782}
1783
1784void BitcodeReader::setDeferredFunctionInfo(unsigned FuncBitcodeOffsetDelta,
1785 Function *F,
1786 ArrayRef<uint64_t> Record) {
1787 // Note that we subtract 1 here because the offset is relative to one word
1788 // before the start of the identification or module block, which was
1789 // historically always the start of the regular bitcode header.
1790 uint64_t FuncWordOffset = Record[1] - 1;
1791 uint64_t FuncBitOffset = FuncWordOffset * 32;
1792 DeferredFunctionInfo[F] = FuncBitOffset + FuncBitcodeOffsetDelta;
1793 // Set the LastFunctionBlockBit to point to the last function block.
1794 // Later when parsing is resumed after function materialization,
1795 // we can simply skip that last function block.
1796 if (FuncBitOffset > LastFunctionBlockBit)
1797 LastFunctionBlockBit = FuncBitOffset;
1798}
1799
1800/// Read a new-style GlobalValue symbol table.
1801Error BitcodeReader::parseGlobalValueSymbolTable() {
1802 unsigned FuncBitcodeOffsetDelta =
1803 Stream.getAbbrevIDWidth() + bitc::BlockIDWidth;
1804
1805 if (Stream.EnterSubBlock(bitc::VALUE_SYMTAB_BLOCK_ID))
1806 return error("Invalid record");
1807
1808 SmallVector<uint64_t, 64> Record;
1809 while (true) {
1810 BitstreamEntry Entry = Stream.advanceSkippingSubblocks();
1811
1812 switch (Entry.Kind) {
1813 case BitstreamEntry::SubBlock:
1814 case BitstreamEntry::Error:
1815 return error("Malformed block");
1816 case BitstreamEntry::EndBlock:
1817 return Error::success();
1818 case BitstreamEntry::Record:
1819 break;
1820 }
1821
1822 Record.clear();
1823 switch (Stream.readRecord(Entry.ID, Record)) {
1824 case bitc::VST_CODE_FNENTRY: // [valueid, offset]
1825 setDeferredFunctionInfo(FuncBitcodeOffsetDelta,
1826 cast<Function>(ValueList[Record[0]]), Record);
1827 break;
1828 }
1829 }
1830}
1831
1832/// Parse the value symbol table at either the current parsing location or
1833/// at the given bit offset if provided.
1834Error BitcodeReader::parseValueSymbolTable(uint64_t Offset) {
1835 uint64_t CurrentBit;
1836 // Pass in the Offset to distinguish between calling for the module-level
1837 // VST (where we want to jump to the VST offset) and the function-level
1838 // VST (where we don't).
1839 if (Offset > 0) {
1840 CurrentBit = jumpToValueSymbolTable(Offset, Stream);
1841 // If this module uses a string table, read this as a module-level VST.
1842 if (UseStrtab) {
1843 if (Error Err = parseGlobalValueSymbolTable())
1844 return Err;
1845 Stream.JumpToBit(CurrentBit);
1846 return Error::success();
1847 }
1848 // Otherwise, the VST will be in a similar format to a function-level VST,
1849 // and will contain symbol names.
1850 }
1851
1852 // Compute the delta between the bitcode indices in the VST (the word offset
1853 // to the word-aligned ENTER_SUBBLOCK for the function block, and that
1854 // expected by the lazy reader. The reader's EnterSubBlock expects to have
1855 // already read the ENTER_SUBBLOCK code (size getAbbrevIDWidth) and BlockID
1856 // (size BlockIDWidth). Note that we access the stream's AbbrevID width here
1857 // just before entering the VST subblock because: 1) the EnterSubBlock
1858 // changes the AbbrevID width; 2) the VST block is nested within the same
1859 // outer MODULE_BLOCK as the FUNCTION_BLOCKs and therefore have the same
1860 // AbbrevID width before calling EnterSubBlock; and 3) when we want to
1861 // jump to the FUNCTION_BLOCK using this offset later, we don't want
1862 // to rely on the stream's AbbrevID width being that of the MODULE_BLOCK.
1863 unsigned FuncBitcodeOffsetDelta =
1864 Stream.getAbbrevIDWidth() + bitc::BlockIDWidth;
1865
1866 if (Stream.EnterSubBlock(bitc::VALUE_SYMTAB_BLOCK_ID))
1867 return error("Invalid record");
1868
1869 SmallVector<uint64_t, 64> Record;
1870
1871 Triple TT(TheModule->getTargetTriple());
1872
1873 // Read all the records for this value table.
1874 SmallString<128> ValueName;
1875
1876 while (true) {
1877 BitstreamEntry Entry = Stream.advanceSkippingSubblocks();
1878
1879 switch (Entry.Kind) {
1880 case BitstreamEntry::SubBlock: // Handled for us already.
1881 case BitstreamEntry::Error:
1882 return error("Malformed block");
1883 case BitstreamEntry::EndBlock:
1884 if (Offset > 0)
1885 Stream.JumpToBit(CurrentBit);
1886 return Error::success();
1887 case BitstreamEntry::Record:
1888 // The interesting case.
1889 break;
1890 }
1891
1892 // Read a record.
1893 Record.clear();
1894 switch (Stream.readRecord(Entry.ID, Record)) {
1895 default: // Default behavior: unknown type.
1896 break;
1897 case bitc::VST_CODE_ENTRY: { // VST_CODE_ENTRY: [valueid, namechar x N]
1898 Expected<Value *> ValOrErr = recordValue(Record, 1, TT);
1899 if (Error Err = ValOrErr.takeError())
1900 return Err;
1901 ValOrErr.get();
1902 break;
1903 }
1904 case bitc::VST_CODE_FNENTRY: {
1905 // VST_CODE_FNENTRY: [valueid, offset, namechar x N]
1906 Expected<Value *> ValOrErr = recordValue(Record, 2, TT);
1907 if (Error Err = ValOrErr.takeError())
1908 return Err;
1909 Value *V = ValOrErr.get();
1910
1911 // Ignore function offsets emitted for aliases of functions in older
1912 // versions of LLVM.
1913 if (auto *F = dyn_cast<Function>(V))
1914 setDeferredFunctionInfo(FuncBitcodeOffsetDelta, F, Record);
1915 break;
1916 }
1917 case bitc::VST_CODE_BBENTRY: {
1918 if (convertToString(Record, 1, ValueName))
1919 return error("Invalid record");
1920 BasicBlock *BB = getBasicBlock(Record[0]);
1921 if (!BB)
1922 return error("Invalid record");
1923
1924 BB->setName(StringRef(ValueName.data(), ValueName.size()));
1925 ValueName.clear();
1926 break;
1927 }
1928 }
1929 }
1930}
1931
1932/// Decode a signed value stored with the sign bit in the LSB for dense VBR
1933/// encoding.
1934uint64_t BitcodeReader::decodeSignRotatedValue(uint64_t V) {
1935 if ((V & 1) == 0)
1936 return V >> 1;
1937 if (V != 1)
1938 return -(V >> 1);
1939 // There is no such thing as -0 with integers. "-0" really means MININT.
1940 return 1ULL << 63;
1941}
1942
1943/// Resolve all of the initializers for global values and aliases that we can.
1944Error BitcodeReader::resolveGlobalAndIndirectSymbolInits() {
1945 std::vector<std::pair<GlobalVariable*, unsigned> > GlobalInitWorklist;
1946 std::vector<std::pair<GlobalIndirectSymbol*, unsigned> >
1947 IndirectSymbolInitWorklist;
1948 std::vector<std::pair<Function*, unsigned> > FunctionPrefixWorklist;
1949 std::vector<std::pair<Function*, unsigned> > FunctionPrologueWorklist;
1950 std::vector<std::pair<Function*, unsigned> > FunctionPersonalityFnWorklist;
1951
1952 GlobalInitWorklist.swap(GlobalInits);
1953 IndirectSymbolInitWorklist.swap(IndirectSymbolInits);
1954 FunctionPrefixWorklist.swap(FunctionPrefixes);
1955 FunctionPrologueWorklist.swap(FunctionPrologues);
1956 FunctionPersonalityFnWorklist.swap(FunctionPersonalityFns);
1957
1958 while (!GlobalInitWorklist.empty()) {
1959 unsigned ValID = GlobalInitWorklist.back().second;
1960 if (ValID >= ValueList.size()) {
1961 // Not ready to resolve this yet, it requires something later in the file.
1962 GlobalInits.push_back(GlobalInitWorklist.back());
1963 } else {
1964 if (Constant *C = dyn_cast_or_null<Constant>(ValueList[ValID]))
1965 GlobalInitWorklist.back().first->setInitializer(C);
1966 else
1967 return error("Expected a constant");
1968 }
1969 GlobalInitWorklist.pop_back();
1970 }
1971
1972 while (!IndirectSymbolInitWorklist.empty()) {
1973 unsigned ValID = IndirectSymbolInitWorklist.back().second;
1974 if (ValID >= ValueList.size()) {
1975 IndirectSymbolInits.push_back(IndirectSymbolInitWorklist.back());
1976 } else {
1977 Constant *C = dyn_cast_or_null<Constant>(ValueList[ValID]);
1978 if (!C)
1979 return error("Expected a constant");
1980 GlobalIndirectSymbol *GIS = IndirectSymbolInitWorklist.back().first;
1981 if (isa<GlobalAlias>(GIS) && C->getType() != GIS->getType())
1982 return error("Alias and aliasee types don't match");
1983 GIS->setIndirectSymbol(C);
1984 }
1985 IndirectSymbolInitWorklist.pop_back();
1986 }
1987
1988 while (!FunctionPrefixWorklist.empty()) {
1989 unsigned ValID = FunctionPrefixWorklist.back().second;
1990 if (ValID >= ValueList.size()) {
1991 FunctionPrefixes.push_back(FunctionPrefixWorklist.back());
1992 } else {
1993 if (Constant *C = dyn_cast_or_null<Constant>(ValueList[ValID]))
1994 FunctionPrefixWorklist.back().first->setPrefixData(C);
1995 else
1996 return error("Expected a constant");
1997 }
1998 FunctionPrefixWorklist.pop_back();
1999 }
2000
2001 while (!FunctionPrologueWorklist.empty()) {
2002 unsigned ValID = FunctionPrologueWorklist.back().second;
2003 if (ValID >= ValueList.size()) {
2004 FunctionPrologues.push_back(FunctionPrologueWorklist.back());
2005 } else {
2006 if (Constant *C = dyn_cast_or_null<Constant>(ValueList[ValID]))
2007 FunctionPrologueWorklist.back().first->setPrologueData(C);
2008 else
2009 return error("Expected a constant");
2010 }
2011 FunctionPrologueWorklist.pop_back();
2012 }
2013
2014 while (!FunctionPersonalityFnWorklist.empty()) {
2015 unsigned ValID = FunctionPersonalityFnWorklist.back().second;
2016 if (ValID >= ValueList.size()) {
2017 FunctionPersonalityFns.push_back(FunctionPersonalityFnWorklist.back());
2018 } else {
2019 if (Constant *C = dyn_cast_or_null<Constant>(ValueList[ValID]))
2020 FunctionPersonalityFnWorklist.back().first->setPersonalityFn(C);
2021 else
2022 return error("Expected a constant");
2023 }
2024 FunctionPersonalityFnWorklist.pop_back();
2025 }
2026
2027 return Error::success();
2028}
2029
2030static APInt readWideAPInt(ArrayRef<uint64_t> Vals, unsigned TypeBits) {
2031 SmallVector<uint64_t, 8> Words(Vals.size());
2032 transform(Vals, Words.begin(),
2033 BitcodeReader::decodeSignRotatedValue);
2034
2035 return APInt(TypeBits, Words);
2036}
2037
2038Error BitcodeReader::parseConstants() {
2039 if (Stream.EnterSubBlock(bitc::CONSTANTS_BLOCK_ID))
2040 return error("Invalid record");
2041
2042 SmallVector<uint64_t, 64> Record;
2043
2044 // Read all the records for this value table.
2045 Type *CurTy = Type::getInt32Ty(Context);
2046 unsigned NextCstNo = ValueList.size();
2047
2048 while (true) {
2049 BitstreamEntry Entry = Stream.advanceSkippingSubblocks();
2050
2051 switch (Entry.Kind) {
2052 case BitstreamEntry::SubBlock: // Handled for us already.
2053 case BitstreamEntry::Error:
2054 return error("Malformed block");
2055 case BitstreamEntry::EndBlock:
2056 if (NextCstNo != ValueList.size())
2057 return error("Invalid constant reference");
2058
2059 // Once all the constants have been read, go through and resolve forward
2060 // references.
2061 ValueList.resolveConstantForwardRefs();
2062 return Error::success();
2063 case BitstreamEntry::Record:
2064 // The interesting case.
2065 break;
2066 }
2067
2068 // Read a record.
2069 Record.clear();
2070 Type *VoidType = Type::getVoidTy(Context);
2071 Value *V = nullptr;
2072 unsigned BitCode = Stream.readRecord(Entry.ID, Record);
2073 switch (BitCode) {
2074 default: // Default behavior: unknown constant
2075 case bitc::CST_CODE_UNDEF: // UNDEF
2076 V = UndefValue::get(CurTy);
2077 break;
2078 case bitc::CST_CODE_SETTYPE: // SETTYPE: [typeid]
2079 if (Record.empty())
2080 return error("Invalid record");
2081 if (Record[0] >= TypeList.size() || !TypeList[Record[0]])
2082 return error("Invalid record");
2083 if (TypeList[Record[0]] == VoidType)
2084 return error("Invalid constant type");
2085 CurTy = TypeList[Record[0]];
2086 continue; // Skip the ValueList manipulation.
2087 case bitc::CST_CODE_NULL: // NULL
2088 V = Constant::getNullValue(CurTy);
2089 break;
2090 case bitc::CST_CODE_INTEGER: // INTEGER: [intval]
2091 if (!CurTy->isIntegerTy() || Record.empty())
2092 return error("Invalid record");
2093 V = ConstantInt::get(CurTy, decodeSignRotatedValue(Record[0]));
2094 break;
2095 case bitc::CST_CODE_WIDE_INTEGER: {// WIDE_INTEGER: [n x intval]
2096 if (!CurTy->isIntegerTy() || Record.empty())
2097 return error("Invalid record");
2098
2099 APInt VInt =
2100 readWideAPInt(Record, cast<IntegerType>(CurTy)->getBitWidth());
2101 V = ConstantInt::get(Context, VInt);
2102
2103 break;
2104 }
2105 case bitc::CST_CODE_FLOAT: { // FLOAT: [fpval]
2106 if (Record.empty())
2107 return error("Invalid record");
2108 if (CurTy->isHalfTy())
2109 V = ConstantFP::get(Context, APFloat(APFloat::IEEEhalf(),
2110 APInt(16, (uint16_t)Record[0])));
2111 else if (CurTy->isFloatTy())
2112 V = ConstantFP::get(Context, APFloat(APFloat::IEEEsingle(),
2113 APInt(32, (uint32_t)Record[0])));
2114 else if (CurTy->isDoubleTy())
2115 V = ConstantFP::get(Context, APFloat(APFloat::IEEEdouble(),
2116 APInt(64, Record[0])));
2117 else if (CurTy->isX86_FP80Ty()) {
2118 // Bits are not stored the same way as a normal i80 APInt, compensate.
2119 uint64_t Rearrange[2];
2120 Rearrange[0] = (Record[1] & 0xffffLL) | (Record[0] << 16);
2121 Rearrange[1] = Record[0] >> 48;
2122 V = ConstantFP::get(Context, APFloat(APFloat::x87DoubleExtended(),
2123 APInt(80, Rearrange)));
2124 } else if (CurTy->isFP128Ty())
2125 V = ConstantFP::get(Context, APFloat(APFloat::IEEEquad(),
2126 APInt(128, Record)));
2127 else if (CurTy->isPPC_FP128Ty())
2128 V = ConstantFP::get(Context, APFloat(APFloat::PPCDoubleDouble(),
2129 APInt(128, Record)));
2130 else
2131 V = UndefValue::get(CurTy);
2132 break;
2133 }
2134
2135 case bitc::CST_CODE_AGGREGATE: {// AGGREGATE: [n x value number]
2136 if (Record.empty())
2137 return error("Invalid record");
2138
2139 unsigned Size = Record.size();
2140 SmallVector<Constant*, 16> Elts;
2141
2142 if (StructType *STy = dyn_cast<StructType>(CurTy)) {
2143 for (unsigned i = 0; i != Size; ++i)
2144 Elts.push_back(ValueList.getConstantFwdRef(Record[i],
2145 STy->getElementType(i)));
2146 V = ConstantStruct::get(STy, Elts);
2147 } else if (ArrayType *ATy = dyn_cast<ArrayType>(CurTy)) {
2148 Type *EltTy = ATy->getElementType();
2149 for (unsigned i = 0; i != Size; ++i)
2150 Elts.push_back(ValueList.getConstantFwdRef(Record[i], EltTy));
2151 V = ConstantArray::get(ATy, Elts);
2152 } else if (VectorType *VTy = dyn_cast<VectorType>(CurTy)) {
2153 Type *EltTy = VTy->getElementType();
2154 for (unsigned i = 0; i != Size; ++i)
2155 Elts.push_back(ValueList.getConstantFwdRef(Record[i], EltTy));
2156 V = ConstantVector::get(Elts);
2157 } else {
2158 V = UndefValue::get(CurTy);
2159 }
2160 break;
2161 }
2162 case bitc::CST_CODE_STRING: // STRING: [values]
2163 case bitc::CST_CODE_CSTRING: { // CSTRING: [values]
2164 if (Record.empty())
2165 return error("Invalid record");
2166
2167 SmallString<16> Elts(Record.begin(), Record.end());
2168 V = ConstantDataArray::getString(Context, Elts,
2169 BitCode == bitc::CST_CODE_CSTRING);
2170 break;
2171 }
2172 case bitc::CST_CODE_DATA: {// DATA: [n x value]
2173 if (Record.empty())
2174 return error("Invalid record");
2175
2176 Type *EltTy = cast<SequentialType>(CurTy)->getElementType();
2177 if (EltTy->isIntegerTy(8)) {
2178 SmallVector<uint8_t, 16> Elts(Record.begin(), Record.end());
2179 if (isa<VectorType>(CurTy))
2180 V = ConstantDataVector::get(Context, Elts);
2181 else
2182 V = ConstantDataArray::get(Context, Elts);
2183 } else if (EltTy->isIntegerTy(16)) {
2184 SmallVector<uint16_t, 16> Elts(Record.begin(), Record.end());
2185 if (isa<VectorType>(CurTy))
2186 V = ConstantDataVector::get(Context, Elts);
2187 else
2188 V = ConstantDataArray::get(Context, Elts);
2189 } else if (EltTy->isIntegerTy(32)) {
2190 SmallVector<uint32_t, 16> Elts(Record.begin(), Record.end());
2191 if (isa<VectorType>(CurTy))
2192 V = ConstantDataVector::get(Context, Elts);
2193 else
2194 V = ConstantDataArray::get(Context, Elts);
2195 } else if (EltTy->isIntegerTy(64)) {
2196 SmallVector<uint64_t, 16> Elts(Record.begin(), Record.end());
2197 if (isa<VectorType>(CurTy))
2198 V = ConstantDataVector::get(Context, Elts);
2199 else
2200 V = ConstantDataArray::get(Context, Elts);
2201 } else if (EltTy->isHalfTy()) {
2202 SmallVector<uint16_t, 16> Elts(Record.begin(), Record.end());
2203 if (isa<VectorType>(CurTy))
2204 V = ConstantDataVector::getFP(Context, Elts);
2205 else
2206 V = ConstantDataArray::getFP(Context, Elts);
2207 } else if (EltTy->isFloatTy()) {
2208 SmallVector<uint32_t, 16> Elts(Record.begin(), Record.end());
2209 if (isa<VectorType>(CurTy))
2210 V = ConstantDataVector::getFP(Context, Elts);
2211 else
2212 V = ConstantDataArray::getFP(Context, Elts);
2213 } else if (EltTy->isDoubleTy()) {
2214 SmallVector<uint64_t, 16> Elts(Record.begin(), Record.end());
2215 if (isa<VectorType>(CurTy))
2216 V = ConstantDataVector::getFP(Context, Elts);
2217 else
2218 V = ConstantDataArray::getFP(Context, Elts);
2219 } else {
2220 return error("Invalid type for value");
2221 }
2222 break;
2223 }
2224 case bitc::CST_CODE_CE_BINOP: { // CE_BINOP: [opcode, opval, opval]
2225 if (Record.size() < 3)
2226 return error("Invalid record");
2227 int Opc = getDecodedBinaryOpcode(Record[0], CurTy);
2228 if (Opc < 0) {
2229 V = UndefValue::get(CurTy); // Unknown binop.
2230 } else {
2231 Constant *LHS = ValueList.getConstantFwdRef(Record[1], CurTy);
2232 Constant *RHS = ValueList.getConstantFwdRef(Record[2], CurTy);
2233 unsigned Flags = 0;
2234 if (Record.size() >= 4) {
2235 if (Opc == Instruction::Add ||
2236 Opc == Instruction::Sub ||
2237 Opc == Instruction::Mul ||
2238 Opc == Instruction::Shl) {
2239 if (Record[3] & (1 << bitc::OBO_NO_SIGNED_WRAP))
2240 Flags |= OverflowingBinaryOperator::NoSignedWrap;
2241 if (Record[3] & (1 << bitc::OBO_NO_UNSIGNED_WRAP))
2242 Flags |= OverflowingBinaryOperator::NoUnsignedWrap;
2243 } else if (Opc == Instruction::SDiv ||
2244 Opc == Instruction::UDiv ||
2245 Opc == Instruction::LShr ||
2246 Opc == Instruction::AShr) {
2247 if (Record[3] & (1 << bitc::PEO_EXACT))
2248 Flags |= SDivOperator::IsExact;
2249 }
2250 }
2251 V = ConstantExpr::get(Opc, LHS, RHS, Flags);
2252 }
2253 break;
2254 }
2255 case bitc::CST_CODE_CE_CAST: { // CE_CAST: [opcode, opty, opval]
2256 if (Record.size() < 3)
2257 return error("Invalid record");
2258 int Opc = getDecodedCastOpcode(Record[0]);
2259 if (Opc < 0) {
2260 V = UndefValue::get(CurTy); // Unknown cast.
2261 } else {
2262 Type *OpTy = getTypeByID(Record[1]);
2263 if (!OpTy)
2264 return error("Invalid record");
2265 Constant *Op = ValueList.getConstantFwdRef(Record[2], OpTy);
2266 V = UpgradeBitCastExpr(Opc, Op, CurTy);
2267 if (!V) V = ConstantExpr::getCast(Opc, Op, CurTy);
2268 }
2269 break;
2270 }
2271 case bitc::CST_CODE_CE_INBOUNDS_GEP: // [ty, n x operands]
2272 case bitc::CST_CODE_CE_GEP: // [ty, n x operands]
2273 case bitc::CST_CODE_CE_GEP_WITH_INRANGE_INDEX: { // [ty, flags, n x
2274 // operands]
2275 unsigned OpNum = 0;
2276 Type *PointeeType = nullptr;
2277 if (BitCode == bitc::CST_CODE_CE_GEP_WITH_INRANGE_INDEX ||
2278 Record.size() % 2)
2279 PointeeType = getTypeByID(Record[OpNum++]);
2280
2281 bool InBounds = false;
2282 Optional<unsigned> InRangeIndex;
2283 if (BitCode == bitc::CST_CODE_CE_GEP_WITH_INRANGE_INDEX) {
2284 uint64_t Op = Record[OpNum++];
2285 InBounds = Op & 1;
2286 InRangeIndex = Op >> 1;
2287 } else if (BitCode == bitc::CST_CODE_CE_INBOUNDS_GEP)
2288 InBounds = true;
2289
2290 SmallVector<Constant*, 16> Elts;
2291 while (OpNum != Record.size()) {
2292 Type *ElTy = getTypeByID(Record[OpNum++]);
2293 if (!ElTy)
2294 return error("Invalid record");
2295 Elts.push_back(ValueList.getConstantFwdRef(Record[OpNum++], ElTy));
2296 }
2297
2298 if (PointeeType &&
2299 PointeeType !=
2300 cast<PointerType>(Elts[0]->getType()->getScalarType())
2301 ->getElementType())
2302 return error("Explicit gep operator type does not match pointee type "
2303 "of pointer operand");
2304
2305 if (Elts.size() < 1)
2306 return error("Invalid gep with no operands");
2307
2308 ArrayRef<Constant *> Indices(Elts.begin() + 1, Elts.end());
2309 V = ConstantExpr::getGetElementPtr(PointeeType, Elts[0], Indices,
2310 InBounds, InRangeIndex);
2311 break;
2312 }
2313 case bitc::CST_CODE_CE_SELECT: { // CE_SELECT: [opval#, opval#, opval#]
2314 if (Record.size() < 3)
2315 return error("Invalid record");
2316
2317 Type *SelectorTy = Type::getInt1Ty(Context);
2318
2319 // The selector might be an i1 or an <n x i1>
2320 // Get the type from the ValueList before getting a forward ref.
2321 if (VectorType *VTy = dyn_cast<VectorType>(CurTy))
2322 if (Value *V = ValueList[Record[0]])
2323 if (SelectorTy != V->getType())
2324 SelectorTy = VectorType::get(SelectorTy, VTy->getNumElements());
2325
2326 V = ConstantExpr::getSelect(ValueList.getConstantFwdRef(Record[0],
2327 SelectorTy),
2328 ValueList.getConstantFwdRef(Record[1],CurTy),
2329 ValueList.getConstantFwdRef(Record[2],CurTy));
2330 break;
2331 }
2332 case bitc::CST_CODE_CE_EXTRACTELT
2333 : { // CE_EXTRACTELT: [opty, opval, opty, opval]
2334 if (Record.size() < 3)
2335 return error("Invalid record");
2336 VectorType *OpTy =
2337 dyn_cast_or_null<VectorType>(getTypeByID(Record[0]));
2338 if (!OpTy)
2339 return error("Invalid record");
2340 Constant *Op0 = ValueList.getConstantFwdRef(Record[1], OpTy);
2341 Constant *Op1 = nullptr;
2342 if (Record.size() == 4) {
2343 Type *IdxTy = getTypeByID(Record[2]);
2344 if (!IdxTy)
2345 return error("Invalid record");
2346 Op1 = ValueList.getConstantFwdRef(Record[3], IdxTy);
2347 } else // TODO: Remove with llvm 4.0
2348 Op1 = ValueList.getConstantFwdRef(Record[2], Type::getInt32Ty(Context));
2349 if (!Op1)
2350 return error("Invalid record");
2351 V = ConstantExpr::getExtractElement(Op0, Op1);
2352 break;
2353 }
2354 case bitc::CST_CODE_CE_INSERTELT
2355 : { // CE_INSERTELT: [opval, opval, opty, opval]
2356 VectorType *OpTy = dyn_cast<VectorType>(CurTy);
2357 if (Record.size() < 3 || !OpTy)
2358 return error("Invalid record");
2359 Constant *Op0 = ValueList.getConstantFwdRef(Record[0], OpTy);
2360 Constant *Op1 = ValueList.getConstantFwdRef(Record[1],
2361 OpTy->getElementType());
2362 Constant *Op2 = nullptr;
2363 if (Record.size() == 4) {
2364 Type *IdxTy = getTypeByID(Record[2]);
2365 if (!IdxTy)
2366 return error("Invalid record");
2367 Op2 = ValueList.getConstantFwdRef(Record[3], IdxTy);
2368 } else // TODO: Remove with llvm 4.0
2369 Op2 = ValueList.getConstantFwdRef(Record[2], Type::getInt32Ty(Context));
2370 if (!Op2)
2371 return error("Invalid record");
2372 V = ConstantExpr::getInsertElement(Op0, Op1, Op2);
2373 break;
2374 }
2375 case bitc::CST_CODE_CE_SHUFFLEVEC: { // CE_SHUFFLEVEC: [opval, opval, opval]
2376 VectorType *OpTy = dyn_cast<VectorType>(CurTy);
2377 if (Record.size() < 3 || !OpTy)
2378 return error("Invalid record");
2379 Constant *Op0 = ValueList.getConstantFwdRef(Record[0], OpTy);
2380 Constant *Op1 = ValueList.getConstantFwdRef(Record[1], OpTy);
2381 Type *ShufTy = VectorType::get(Type::getInt32Ty(Context),
2382 OpTy->getNumElements());
2383 Constant *Op2 = ValueList.getConstantFwdRef(Record[2], ShufTy);
2384 V = ConstantExpr::getShuffleVector(Op0, Op1, Op2);
2385 break;
2386 }
2387 case bitc::CST_CODE_CE_SHUFVEC_EX: { // [opty, opval, opval, opval]
2388 VectorType *RTy = dyn_cast<VectorType>(CurTy);
2389 VectorType *OpTy =
2390 dyn_cast_or_null<VectorType>(getTypeByID(Record[0]));
2391 if (Record.size() < 4 || !RTy || !OpTy)
2392 return error("Invalid record");
2393 Constant *Op0 = ValueList.getConstantFwdRef(Record[1], OpTy);
2394 Constant *Op1 = ValueList.getConstantFwdRef(Record[2], OpTy);
2395 Type *ShufTy = VectorType::get(Type::getInt32Ty(Context),
2396 RTy->getNumElements());
2397 Constant *Op2 = ValueList.getConstantFwdRef(Record[3], ShufTy);
2398 V = ConstantExpr::getShuffleVector(Op0, Op1, Op2);
2399 break;
2400 }
2401 case bitc::CST_CODE_CE_CMP: { // CE_CMP: [opty, opval, opval, pred]
2402 if (Record.size() < 4)
2403 return error("Invalid record");
2404 Type *OpTy = getTypeByID(Record[0]);
2405 if (!OpTy)
2406 return error("Invalid record");
2407 Constant *Op0 = ValueList.getConstantFwdRef(Record[1], OpTy);
2408 Constant *Op1 = ValueList.getConstantFwdRef(Record[2], OpTy);
2409
2410 if (OpTy->isFPOrFPVectorTy())
2411 V = ConstantExpr::getFCmp(Record[3], Op0, Op1);
2412 else
2413 V = ConstantExpr::getICmp(Record[3], Op0, Op1);
2414 break;
2415 }
2416 // This maintains backward compatibility, pre-asm dialect keywords.
2417 // FIXME: Remove with the 4.0 release.
2418 case bitc::CST_CODE_INLINEASM_OLD: {
2419 if (Record.size() < 2)
2420 return error("Invalid record");
2421 std::string AsmStr, ConstrStr;
2422 bool HasSideEffects = Record[0] & 1;
2423 bool IsAlignStack = Record[0] >> 1;
2424 unsigned AsmStrSize = Record[1];
2425 if (2+AsmStrSize >= Record.size())
2426 return error("Invalid record");
2427 unsigned ConstStrSize = Record[2+AsmStrSize];
2428 if (3+AsmStrSize+ConstStrSize > Record.size())
2429 return error("Invalid record");
2430
2431 for (unsigned i = 0; i != AsmStrSize; ++i)
2432 AsmStr += (char)Record[2+i];
2433 for (unsigned i = 0; i != ConstStrSize; ++i)
2434 ConstrStr += (char)Record[3+AsmStrSize+i];
2435 PointerType *PTy = cast<PointerType>(CurTy);
2436 V = InlineAsm::get(cast<FunctionType>(PTy->getElementType()),
2437 AsmStr, ConstrStr, HasSideEffects, IsAlignStack);
2438 break;
2439 }
2440 // This version adds support for the asm dialect keywords (e.g.,
2441 // inteldialect).
2442 case bitc::CST_CODE_INLINEASM: {
2443 if (Record.size() < 2)
2444 return error("Invalid record");
2445 std::string AsmStr, ConstrStr;
2446 bool HasSideEffects = Record[0] & 1;
2447 bool IsAlignStack = (Record[0] >> 1) & 1;
2448 unsigned AsmDialect = Record[0] >> 2;
2449 unsigned AsmStrSize = Record[1];
2450 if (2+AsmStrSize >= Record.size())
2451 return error("Invalid record");
2452 unsigned ConstStrSize = Record[2+AsmStrSize];
2453 if (3+AsmStrSize+ConstStrSize > Record.size())
2454 return error("Invalid record");
2455
2456 for (unsigned i = 0; i != AsmStrSize; ++i)
2457 AsmStr += (char)Record[2+i];
2458 for (unsigned i = 0; i != ConstStrSize; ++i)
2459 ConstrStr += (char)Record[3+AsmStrSize+i];
2460 PointerType *PTy = cast<PointerType>(CurTy);
2461 V = InlineAsm::get(cast<FunctionType>(PTy->getElementType()),
2462 AsmStr, ConstrStr, HasSideEffects, IsAlignStack,
2463 InlineAsm::AsmDialect(AsmDialect));
2464 break;
2465 }
2466 case bitc::CST_CODE_BLOCKADDRESS:{
2467 if (Record.size() < 3)
2468 return error("Invalid record");
2469 Type *FnTy = getTypeByID(Record[0]);
2470 if (!FnTy)
2471 return error("Invalid record");
2472 Function *Fn =
2473 dyn_cast_or_null<Function>(ValueList.getConstantFwdRef(Record[1],FnTy));
2474 if (!Fn)
2475 return error("Invalid record");
2476
2477 // If the function is already parsed we can insert the block address right
2478 // away.
2479 BasicBlock *BB;
2480 unsigned BBID = Record[2];
2481 if (!BBID)
2482 // Invalid reference to entry block.
2483 return error("Invalid ID");
2484 if (!Fn->empty()) {
2485 Function::iterator BBI = Fn->begin(), BBE = Fn->end();
2486 for (size_t I = 0, E = BBID; I != E; ++I) {
2487 if (BBI == BBE)
2488 return error("Invalid ID");
2489 ++BBI;
2490 }
2491 BB = &*BBI;
2492 } else {
2493 // Otherwise insert a placeholder and remember it so it can be inserted
2494 // when the function is parsed.
2495 auto &FwdBBs = BasicBlockFwdRefs[Fn];
2496 if (FwdBBs.empty())
2497 BasicBlockFwdRefQueue.push_back(Fn);
2498 if (FwdBBs.size() < BBID + 1)
2499 FwdBBs.resize(BBID + 1);
2500 if (!FwdBBs[BBID])
2501 FwdBBs[BBID] = BasicBlock::Create(Context);
2502 BB = FwdBBs[BBID];
2503 }
2504 V = BlockAddress::get(Fn, BB);
2505 break;
2506 }
2507 }
2508
2509 ValueList.assignValue(V, NextCstNo);
2510 ++NextCstNo;
2511 }
2512}
2513
2514Error BitcodeReader::parseUseLists() {
2515 if (Stream.EnterSubBlock(bitc::USELIST_BLOCK_ID))
2516 return error("Invalid record");
2517
2518 // Read all the records.
2519 SmallVector<uint64_t, 64> Record;
2520
2521 while (true) {
2522 BitstreamEntry Entry = Stream.advanceSkippingSubblocks();
2523
2524 switch (Entry.Kind) {
2525 case BitstreamEntry::SubBlock: // Handled for us already.
2526 case BitstreamEntry::Error:
2527 return error("Malformed block");
2528 case BitstreamEntry::EndBlock:
2529 return Error::success();
2530 case BitstreamEntry::Record:
2531 // The interesting case.
2532 break;
2533 }
2534
2535 // Read a use list record.
2536 Record.clear();
2537 bool IsBB = false;
2538 switch (Stream.readRecord(Entry.ID, Record)) {
2539 default: // Default behavior: unknown type.
2540 break;
2541 case bitc::USELIST_CODE_BB:
2542 IsBB = true;
2543 LLVM_FALLTHROUGH[[clang::fallthrough]];
2544 case bitc::USELIST_CODE_DEFAULT: {
2545 unsigned RecordLength = Record.size();
2546 if (RecordLength < 3)
2547 // Records should have at least an ID and two indexes.
2548 return error("Invalid record");
2549 unsigned ID = Record.back();
2550 Record.pop_back();
2551
2552 Value *V;
2553 if (IsBB) {
2554 assert(ID < FunctionBBs.size() && "Basic block not found")((ID < FunctionBBs.size() && "Basic block not found"
) ? static_cast<void> (0) : __assert_fail ("ID < FunctionBBs.size() && \"Basic block not found\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301769/lib/Bitcode/Reader/BitcodeReader.cpp"
, 2554, __PRETTY_FUNCTION__))
;
2555 V = FunctionBBs[ID];
2556 } else
2557 V = ValueList[ID];
2558 unsigned NumUses = 0;
2559 SmallDenseMap<const Use *, unsigned, 16> Order;
2560 for (const Use &U : V->materialized_uses()) {
2561 if (++NumUses > Record.size())
2562 break;
2563 Order[&U] = Record[NumUses - 1];
2564 }
2565 if (Order.size() != Record.size() || NumUses > Record.size())
2566 // Mismatches can happen if the functions are being materialized lazily
2567 // (out-of-order), or a value has been upgraded.
2568 break;
2569
2570 V->sortUseList([&](const Use &L, const Use &R) {
2571 return Order.lookup(&L) < Order.lookup(&R);
2572 });
2573 break;
2574 }
2575 }
2576 }
2577}
2578
2579/// When we see the block for metadata, remember where it is and then skip it.
2580/// This lets us lazily deserialize the metadata.
2581Error BitcodeReader::rememberAndSkipMetadata() {
2582 // Save the current stream state.
2583 uint64_t CurBit = Stream.GetCurrentBitNo();
2584 DeferredMetadataInfo.push_back(CurBit);
2585
2586 // Skip over the block for now.
2587 if (Stream.SkipBlock())
2588 return error("Invalid record");
2589 return Error::success();
2590}
2591
2592Error BitcodeReader::materializeMetadata() {
2593 for (uint64_t BitPos : DeferredMetadataInfo) {
2594 // Move the bit stream to the saved position.
2595 Stream.JumpToBit(BitPos);
2596 if (Error Err = MDLoader->parseModuleMetadata())
2597 return Err;
2598 }
2599 DeferredMetadataInfo.clear();
2600 return Error::success();
2601}
2602
2603void BitcodeReader::setStripDebugInfo() { StripDebugInfo = true; }
2604
2605/// When we see the block for a function body, remember where it is and then
2606/// skip it. This lets us lazily deserialize the functions.
2607Error BitcodeReader::rememberAndSkipFunctionBody() {
2608 // Get the function we are talking about.
2609 if (FunctionsWithBodies.empty())
2610 return error("Insufficient function protos");
2611
2612 Function *Fn = FunctionsWithBodies.back();
2613 FunctionsWithBodies.pop_back();
2614
2615 // Save the current stream state.
2616 uint64_t CurBit = Stream.GetCurrentBitNo();
2617 assert((((DeferredFunctionInfo[Fn] == 0 || DeferredFunctionInfo[Fn] ==
CurBit) && "Mismatch between VST and scanned function offsets"
) ? static_cast<void> (0) : __assert_fail ("(DeferredFunctionInfo[Fn] == 0 || DeferredFunctionInfo[Fn] == CurBit) && \"Mismatch between VST and scanned function offsets\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301769/lib/Bitcode/Reader/BitcodeReader.cpp"
, 2619, __PRETTY_FUNCTION__))
2618 (DeferredFunctionInfo[Fn] == 0 || DeferredFunctionInfo[Fn] == CurBit) &&(((DeferredFunctionInfo[Fn] == 0 || DeferredFunctionInfo[Fn] ==
CurBit) && "Mismatch between VST and scanned function offsets"
) ? static_cast<void> (0) : __assert_fail ("(DeferredFunctionInfo[Fn] == 0 || DeferredFunctionInfo[Fn] == CurBit) && \"Mismatch between VST and scanned function offsets\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301769/lib/Bitcode/Reader/BitcodeReader.cpp"
, 2619, __PRETTY_FUNCTION__))
2619 "Mismatch between VST and scanned function offsets")(((DeferredFunctionInfo[Fn] == 0 || DeferredFunctionInfo[Fn] ==
CurBit) && "Mismatch between VST and scanned function offsets"
) ? static_cast<void> (0) : __assert_fail ("(DeferredFunctionInfo[Fn] == 0 || DeferredFunctionInfo[Fn] == CurBit) && \"Mismatch between VST and scanned function offsets\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301769/lib/Bitcode/Reader/BitcodeReader.cpp"
, 2619, __PRETTY_FUNCTION__))
;
2620 DeferredFunctionInfo[Fn] = CurBit;
2621
2622 // Skip over the function block for now.
2623 if (Stream.SkipBlock())
2624 return error("Invalid record");
2625 return Error::success();
2626}
2627
2628Error BitcodeReader::globalCleanup() {
2629 // Patch the initializers for globals and aliases up.
2630 if (Error Err = resolveGlobalAndIndirectSymbolInits())
2631 return Err;
2632 if (!GlobalInits.empty() || !IndirectSymbolInits.empty())
2633 return error("Malformed global initializer set");
2634
2635 // Look for intrinsic functions which need to be upgraded at some point
2636 for (Function &F : *TheModule) {
2637 MDLoader->upgradeDebugIntrinsics(F);
2638 Function *NewFn;
2639 if (UpgradeIntrinsicFunction(&F, NewFn))
2640 UpgradedIntrinsics[&F] = NewFn;
2641 else if (auto Remangled = Intrinsic::remangleIntrinsicFunction(&F))
2642 // Some types could be renamed during loading if several modules are
2643 // loaded in the same LLVMContext (LTO scenario). In this case we should
2644 // remangle intrinsics names as well.
2645 RemangledIntrinsics[&F] = Remangled.getValue();
2646 }
2647
2648 // Look for global variables which need to be renamed.
2649 for (GlobalVariable &GV : TheModule->globals())
2650 UpgradeGlobalVariable(&GV);
2651
2652 // Force deallocation of memory for these vectors to favor the client that
2653 // want lazy deserialization.
2654 std::vector<std::pair<GlobalVariable*, unsigned> >().swap(GlobalInits);
2655 std::vector<std::pair<GlobalIndirectSymbol*, unsigned> >().swap(
2656 IndirectSymbolInits);
2657 return Error::success();
2658}
2659
2660/// Support for lazy parsing of function bodies. This is required if we
2661/// either have an old bitcode file without a VST forward declaration record,
2662/// or if we have an anonymous function being materialized, since anonymous
2663/// functions do not have a name and are therefore not in the VST.
2664Error BitcodeReader::rememberAndSkipFunctionBodies() {
2665 Stream.JumpToBit(NextUnreadBit);
2666
2667 if (Stream.AtEndOfStream())
2668 return error("Could not find function in stream");
2669
2670 if (!SeenFirstFunctionBody)
2671 return error("Trying to materialize functions before seeing function blocks");
2672
2673 // An old bitcode file with the symbol table at the end would have
2674 // finished the parse greedily.
2675 assert(SeenValueSymbolTable)((SeenValueSymbolTable) ? static_cast<void> (0) : __assert_fail
("SeenValueSymbolTable", "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301769/lib/Bitcode/Reader/BitcodeReader.cpp"
, 2675, __PRETTY_FUNCTION__))
;
2676
2677 SmallVector<uint64_t, 64> Record;
2678
2679 while (true) {
2680 BitstreamEntry Entry = Stream.advance();
2681 switch (Entry.Kind) {
2682 default:
2683 return error("Expect SubBlock");
2684 case BitstreamEntry::SubBlock:
2685 switch (Entry.ID) {
2686 default:
2687 return error("Expect function block");
2688 case bitc::FUNCTION_BLOCK_ID:
2689 if (Error Err = rememberAndSkipFunctionBody())
2690 return Err;
2691 NextUnreadBit = Stream.GetCurrentBitNo();
2692 return Error::success();
2693 }
2694 }
2695 }
2696}
2697
2698bool BitcodeReaderBase::readBlockInfo() {
2699 Optional<BitstreamBlockInfo> NewBlockInfo = Stream.ReadBlockInfoBlock();
2700 if (!NewBlockInfo)
2701 return true;
2702 BlockInfo = std::move(*NewBlockInfo);
2703 return false;
2704}
2705
2706Error BitcodeReader::parseComdatRecord(ArrayRef<uint64_t> Record) {
2707 // v1: [selection_kind, name]
2708 // v2: [strtab_offset, strtab_size, selection_kind]
2709 StringRef Name;
2710 std::tie(Name, Record) = readNameFromStrtab(Record);
2711
2712 if (Record.size() < 1)
2713 return error("Invalid record");
2714 Comdat::SelectionKind SK = getDecodedComdatSelectionKind(Record[0]);
2715 std::string OldFormatName;
2716 if (!UseStrtab) {
2717 if (Record.size() < 2)
2718 return error("Invalid record");
2719 unsigned ComdatNameSize = Record[1];
2720 OldFormatName.reserve(ComdatNameSize);
2721 for (unsigned i = 0; i != ComdatNameSize; ++i)
2722 OldFormatName += (char)Record[2 + i];
2723 Name = OldFormatName;
2724 }
2725 Comdat *C = TheModule->getOrInsertComdat(Name);
2726 C->setSelectionKind(SK);
2727 ComdatList.push_back(C);
2728 return Error::success();
2729}
2730
2731Error BitcodeReader::parseGlobalVarRecord(ArrayRef<uint64_t> Record) {
2732 // v1: [pointer type, isconst, initid, linkage, alignment, section,
2733 // visibility, threadlocal, unnamed_addr, externally_initialized,
2734 // dllstorageclass, comdat] (name in VST)
2735 // v2: [strtab_offset, strtab_size, v1]
2736 StringRef Name;
2737 std::tie(Name, Record) = readNameFromStrtab(Record);
2738
2739 if (Record.size() < 6)
2740 return error("Invalid record");
2741 Type *Ty = getTypeByID(Record[0]);
2742 if (!Ty)
2743 return error("Invalid record");
2744 bool isConstant = Record[1] & 1;
2745 bool explicitType = Record[1] & 2;
2746 unsigned AddressSpace;
2747 if (explicitType) {
2748 AddressSpace = Record[1] >> 2;
2749 } else {
2750 if (!Ty->isPointerTy())
2751 return error("Invalid type for value");
2752 AddressSpace = cast<PointerType>(Ty)->getAddressSpace();
2753 Ty = cast<PointerType>(Ty)->getElementType();
2754 }
2755
2756 uint64_t RawLinkage = Record[3];
2757 GlobalValue::LinkageTypes Linkage = getDecodedLinkage(RawLinkage);
2758 unsigned Alignment;
2759 if (Error Err = parseAlignmentValue(Record[4], Alignment))
2760 return Err;
2761 std::string Section;
2762 if (Record[5]) {
2763 if (Record[5] - 1 >= SectionTable.size())
2764 return error("Invalid ID");
2765 Section = SectionTable[Record[5] - 1];
2766 }
2767 GlobalValue::VisibilityTypes Visibility = GlobalValue::DefaultVisibility;
2768 // Local linkage must have default visibility.
2769 if (Record.size() > 6 && !GlobalValue::isLocalLinkage(Linkage))
2770 // FIXME: Change to an error if non-default in 4.0.
2771 Visibility = getDecodedVisibility(Record[6]);
2772
2773 GlobalVariable::ThreadLocalMode TLM = GlobalVariable::NotThreadLocal;
2774 if (Record.size() > 7)
2775 TLM = getDecodedThreadLocalMode(Record[7]);
2776
2777 GlobalValue::UnnamedAddr UnnamedAddr = GlobalValue::UnnamedAddr::None;
2778 if (Record.size() > 8)
2779 UnnamedAddr = getDecodedUnnamedAddrType(Record[8]);
2780
2781 bool ExternallyInitialized = false;
2782 if (Record.size() > 9)
2783 ExternallyInitialized = Record[9];
2784
2785 GlobalVariable *NewGV =
2786 new GlobalVariable(*TheModule, Ty, isConstant, Linkage, nullptr, Name,
2787 nullptr, TLM, AddressSpace, ExternallyInitialized);
2788 NewGV->setAlignment(Alignment);
2789 if (!Section.empty())
2790 NewGV->setSection(Section);
2791 NewGV->setVisibility(Visibility);
2792 NewGV->setUnnamedAddr(UnnamedAddr);
2793
2794 if (Record.size() > 10)
2795 NewGV->setDLLStorageClass(getDecodedDLLStorageClass(Record[10]));
2796 else
2797 upgradeDLLImportExportLinkage(NewGV, RawLinkage);
2798
2799 ValueList.push_back(NewGV);
2800
2801 // Remember which value to use for the global initializer.
2802 if (unsigned InitID = Record[2])
2803 GlobalInits.push_back(std::make_pair(NewGV, InitID - 1));
2804
2805 if (Record.size() > 11) {
2806 if (unsigned ComdatID = Record[11]) {
2807 if (ComdatID > ComdatList.size())
2808 return error("Invalid global variable comdat ID");
2809 NewGV->setComdat(ComdatList[ComdatID - 1]);
2810 }
2811 } else if (hasImplicitComdat(RawLinkage)) {
2812 NewGV->setComdat(reinterpret_cast<Comdat *>(1));
2813 }
2814 return Error::success();
2815}
2816
2817Error BitcodeReader::parseFunctionRecord(ArrayRef<uint64_t> Record) {
2818 // v1: [type, callingconv, isproto, linkage, paramattr, alignment, section,
2819 // visibility, gc, unnamed_addr, prologuedata, dllstorageclass, comdat,
2820 // prefixdata] (name in VST)
2821 // v2: [strtab_offset, strtab_size, v1]
2822 StringRef Name;
2823 std::tie(Name, Record) = readNameFromStrtab(Record);
2824
2825 if (Record.size() < 8)
2826 return error("Invalid record");
2827 Type *Ty = getTypeByID(Record[0]);
2828 if (!Ty)
2829 return error("Invalid record");
2830 if (auto *PTy = dyn_cast<PointerType>(Ty))
2831 Ty = PTy->getElementType();
2832 auto *FTy = dyn_cast<FunctionType>(Ty);
2833 if (!FTy)
2834 return error("Invalid type for value");
2835 auto CC = static_cast<CallingConv::ID>(Record[1]);
2836 if (CC & ~CallingConv::MaxID)
2837 return error("Invalid calling convention ID");
2838
2839 Function *Func =
2840 Function::Create(FTy, GlobalValue::ExternalLinkage, Name, TheModule);
2841
2842 Func->setCallingConv(CC);
2843 bool isProto = Record[2];
2844 uint64_t RawLinkage = Record[3];
2845 Func->setLinkage(getDecodedLinkage(RawLinkage));
2846 Func->setAttributes(getAttributes(Record[4]));
2847
2848 unsigned Alignment;
2849 if (Error Err = parseAlignmentValue(Record[5], Alignment))
2850 return Err;
2851 Func->setAlignment(Alignment);
2852 if (Record[6]) {
2853 if (Record[6] - 1 >= SectionTable.size())
2854 return error("Invalid ID");
2855 Func->setSection(SectionTable[Record[6] - 1]);
2856 }
2857 // Local linkage must have default visibility.
2858 if (!Func->hasLocalLinkage())
2859 // FIXME: Change to an error if non-default in 4.0.
2860 Func->setVisibility(getDecodedVisibility(Record[7]));
2861 if (Record.size() > 8 && Record[8]) {
2862 if (Record[8] - 1 >= GCTable.size())
2863 return error("Invalid ID");
2864 Func->setGC(GCTable[Record[8] - 1]);
2865 }
2866 GlobalValue::UnnamedAddr UnnamedAddr = GlobalValue::UnnamedAddr::None;
2867 if (Record.size() > 9)
2868 UnnamedAddr = getDecodedUnnamedAddrType(Record[9]);
2869 Func->setUnnamedAddr(UnnamedAddr);
2870 if (Record.size() > 10 && Record[10] != 0)
2871 FunctionPrologues.push_back(std::make_pair(Func, Record[10] - 1));
2872
2873 if (Record.size() > 11)
2874 Func->setDLLStorageClass(getDecodedDLLStorageClass(Record[11]));
2875 else
2876 upgradeDLLImportExportLinkage(Func, RawLinkage);
2877
2878 if (Record.size() > 12) {
2879 if (unsigned ComdatID = Record[12]) {
2880 if (ComdatID > ComdatList.size())
2881 return error("Invalid function comdat ID");
2882 Func->setComdat(ComdatList[ComdatID - 1]);
2883 }
2884 } else if (hasImplicitComdat(RawLinkage)) {
2885 Func->setComdat(reinterpret_cast<Comdat *>(1));
2886 }
2887
2888 if (Record.size() > 13 && Record[13] != 0)
2889 FunctionPrefixes.push_back(std::make_pair(Func, Record[13] - 1));
2890
2891 if (Record.size() > 14 && Record[14] != 0)
2892 FunctionPersonalityFns.push_back(std::make_pair(Func, Record[14] - 1));
2893
2894 ValueList.push_back(Func);
2895
2896 // If this is a function with a body, remember the prototype we are
2897 // creating now, so that we can match up the body with them later.
2898 if (!isProto) {
2899 Func->setIsMaterializable(true);
2900 FunctionsWithBodies.push_back(Func);
2901 DeferredFunctionInfo[Func] = 0;
2902 }
2903 return Error::success();
2904}
2905
2906Error BitcodeReader::parseGlobalIndirectSymbolRecord(
2907 unsigned BitCode, ArrayRef<uint64_t> Record) {
2908 // v1 ALIAS_OLD: [alias type, aliasee val#, linkage] (name in VST)
2909 // v1 ALIAS: [alias type, addrspace, aliasee val#, linkage, visibility,
2910 // dllstorageclass] (name in VST)
2911 // v1 IFUNC: [alias type, addrspace, aliasee val#, linkage,
2912 // visibility, dllstorageclass] (name in VST)
2913 // v2: [strtab_offset, strtab_size, v1]
2914 StringRef Name;
2915 std::tie(Name, Record) = readNameFromStrtab(Record);
2916
2917 bool NewRecord = BitCode != bitc::MODULE_CODE_ALIAS_OLD;
2918 if (Record.size() < (3 + (unsigned)NewRecord))
2919 return error("Invalid record");
2920 unsigned OpNum = 0;
2921 Type *Ty = getTypeByID(Record[OpNum++]);
2922 if (!Ty)
2923 return error("Invalid record");
2924
2925 unsigned AddrSpace;
2926 if (!NewRecord) {
2927 auto *PTy = dyn_cast<PointerType>(Ty);
2928 if (!PTy)
2929 return error("Invalid type for value");
2930 Ty = PTy->getElementType();
2931 AddrSpace = PTy->getAddressSpace();
2932 } else {
2933 AddrSpace = Record[OpNum++];
2934 }
2935
2936 auto Val = Record[OpNum++];
2937 auto Linkage = Record[OpNum++];
2938 GlobalIndirectSymbol *NewGA;
2939 if (BitCode == bitc::MODULE_CODE_ALIAS ||
2940 BitCode == bitc::MODULE_CODE_ALIAS_OLD)
2941 NewGA = GlobalAlias::create(Ty, AddrSpace, getDecodedLinkage(Linkage), Name,
2942 TheModule);
2943 else
2944 NewGA = GlobalIFunc::create(Ty, AddrSpace, getDecodedLinkage(Linkage), Name,
2945 nullptr, TheModule);
2946 // Old bitcode files didn't have visibility field.
2947 // Local linkage must have default visibility.
2948 if (OpNum != Record.size()) {
2949 auto VisInd = OpNum++;
2950 if (!NewGA->hasLocalLinkage())
2951 // FIXME: Change to an error if non-default in 4.0.
2952 NewGA->setVisibility(getDecodedVisibility(Record[VisInd]));
2953 }
2954 if (OpNum != Record.size())
2955 NewGA->setDLLStorageClass(getDecodedDLLStorageClass(Record[OpNum++]));
2956 else
2957 upgradeDLLImportExportLinkage(NewGA, Linkage);
2958 if (OpNum != Record.size())
2959 NewGA->setThreadLocalMode(getDecodedThreadLocalMode(Record[OpNum++]));
2960 if (OpNum != Record.size())
2961 NewGA->setUnnamedAddr(getDecodedUnnamedAddrType(Record[OpNum++]));
2962 ValueList.push_back(NewGA);
2963 IndirectSymbolInits.push_back(std::make_pair(NewGA, Val));
2964 return Error::success();
2965}
2966
2967Error BitcodeReader::parseModule(uint64_t ResumeBit,
2968 bool ShouldLazyLoadMetadata) {
2969 if (ResumeBit)
2970 Stream.JumpToBit(ResumeBit);
2971 else if (Stream.EnterSubBlock(bitc::MODULE_BLOCK_ID))
2972 return error("Invalid record");
2973
2974 SmallVector<uint64_t, 64> Record;
2975
2976 // Read all the records for this module.
2977 while (true) {
2978 BitstreamEntry Entry = Stream.advance();
2979
2980 switch (Entry.Kind) {
2981 case BitstreamEntry::Error:
2982 return error("Malformed block");
2983 case BitstreamEntry::EndBlock:
2984 return globalCleanup();
2985
2986 case BitstreamEntry::SubBlock:
2987 switch (Entry.ID) {
2988 default: // Skip unknown content.
2989 if (Stream.SkipBlock())
2990 return error("Invalid record");
2991 break;
2992 case bitc::BLOCKINFO_BLOCK_ID:
2993 if (readBlockInfo())
2994 return error("Malformed block");
2995 break;
2996 case bitc::PARAMATTR_BLOCK_ID:
2997 if (Error Err = parseAttributeBlock())
2998 return Err;
2999 break;
3000 case bitc::PARAMATTR_GROUP_BLOCK_ID:
3001 if (Error Err = parseAttributeGroupBlock())
3002 return Err;
3003 break;
3004 case bitc::TYPE_BLOCK_ID_NEW:
3005 if (Error Err = parseTypeTable())
3006 return Err;
3007 break;
3008 case bitc::VALUE_SYMTAB_BLOCK_ID:
3009 if (!SeenValueSymbolTable) {
3010 // Either this is an old form VST without function index and an
3011 // associated VST forward declaration record (which would have caused
3012 // the VST to be jumped to and parsed before it was encountered
3013 // normally in the stream), or there were no function blocks to
3014 // trigger an earlier parsing of the VST.
3015 assert(VSTOffset == 0 || FunctionsWithBodies.empty())((VSTOffset == 0 || FunctionsWithBodies.empty()) ? static_cast
<void> (0) : __assert_fail ("VSTOffset == 0 || FunctionsWithBodies.empty()"
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301769/lib/Bitcode/Reader/BitcodeReader.cpp"
, 3015, __PRETTY_FUNCTION__))
;
3016 if (Error Err = parseValueSymbolTable())
3017 return Err;
3018 SeenValueSymbolTable = true;
3019 } else {
3020 // We must have had a VST forward declaration record, which caused
3021 // the parser to jump to and parse the VST earlier.
3022 assert(VSTOffset > 0)((VSTOffset > 0) ? static_cast<void> (0) : __assert_fail
("VSTOffset > 0", "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301769/lib/Bitcode/Reader/BitcodeReader.cpp"
, 3022, __PRETTY_FUNCTION__))
;
3023 if (Stream.SkipBlock())
3024 return error("Invalid record");
3025 }
3026 break;
3027 case bitc::CONSTANTS_BLOCK_ID:
3028 if (Error Err = parseConstants())
3029 return Err;
3030 if (Error Err = resolveGlobalAndIndirectSymbolInits())
3031 return Err;
3032 break;
3033 case bitc::METADATA_BLOCK_ID:
3034 if (ShouldLazyLoadMetadata) {
3035 if (Error Err = rememberAndSkipMetadata())
3036 return Err;
3037 break;
3038 }
3039 assert(DeferredMetadataInfo.empty() && "Unexpected deferred metadata")((DeferredMetadataInfo.empty() && "Unexpected deferred metadata"
) ? static_cast<void> (0) : __assert_fail ("DeferredMetadataInfo.empty() && \"Unexpected deferred metadata\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301769/lib/Bitcode/Reader/BitcodeReader.cpp"
, 3039, __PRETTY_FUNCTION__))
;
3040 if (Error Err = MDLoader->parseModuleMetadata())
3041 return Err;
3042 break;
3043 case bitc::METADATA_KIND_BLOCK_ID:
3044 if (Error Err = MDLoader->parseMetadataKinds())
3045 return Err;
3046 break;
3047 case bitc::FUNCTION_BLOCK_ID:
3048 // If this is the first function body we've seen, reverse the
3049 // FunctionsWithBodies list.
3050 if (!SeenFirstFunctionBody) {
3051 std::reverse(FunctionsWithBodies.begin(), FunctionsWithBodies.end());
3052 if (Error Err = globalCleanup())
3053 return Err;
3054 SeenFirstFunctionBody = true;
3055 }
3056
3057 if (VSTOffset > 0) {
3058 // If we have a VST forward declaration record, make sure we
3059 // parse the VST now if we haven't already. It is needed to
3060 // set up the DeferredFunctionInfo vector for lazy reading.
3061 if (!SeenValueSymbolTable) {
3062 if (Error Err = BitcodeReader::parseValueSymbolTable(VSTOffset))
3063 return Err;
3064 SeenValueSymbolTable = true;
3065 // Fall through so that we record the NextUnreadBit below.
3066 // This is necessary in case we have an anonymous function that
3067 // is later materialized. Since it will not have a VST entry we
3068 // need to fall back to the lazy parse to find its offset.
3069 } else {
3070 // If we have a VST forward declaration record, but have already
3071 // parsed the VST (just above, when the first function body was
3072 // encountered here), then we are resuming the parse after
3073 // materializing functions. The ResumeBit points to the
3074 // start of the last function block recorded in the
3075 // DeferredFunctionInfo map. Skip it.
3076 if (Stream.SkipBlock())
3077 return error("Invalid record");
3078 continue;
3079 }
3080 }
3081
3082 // Support older bitcode files that did not have the function
3083 // index in the VST, nor a VST forward declaration record, as
3084 // well as anonymous functions that do not have VST entries.
3085 // Build the DeferredFunctionInfo vector on the fly.
3086 if (Error Err = rememberAndSkipFunctionBody())
3087 return Err;
3088
3089 // Suspend parsing when we reach the function bodies. Subsequent
3090 // materialization calls will resume it when necessary. If the bitcode
3091 // file is old, the symbol table will be at the end instead and will not
3092 // have been seen yet. In this case, just finish the parse now.
3093 if (SeenValueSymbolTable) {
3094 NextUnreadBit = Stream.GetCurrentBitNo();
3095 // After the VST has been parsed, we need to make sure intrinsic name
3096 // are auto-upgraded.
3097 return globalCleanup();
3098 }
3099 break;
3100 case bitc::USELIST_BLOCK_ID:
3101 if (Error Err = parseUseLists())
3102 return Err;
3103 break;
3104 case bitc::OPERAND_BUNDLE_TAGS_BLOCK_ID:
3105 if (Error Err = parseOperandBundleTags())
3106 return Err;
3107 break;
3108 }
3109 continue;
3110
3111 case BitstreamEntry::Record:
3112 // The interesting case.
3113 break;
3114 }
3115
3116 // Read a record.
3117 auto BitCode = Stream.readRecord(Entry.ID, Record);
3118 switch (BitCode) {
3119 default: break; // Default behavior, ignore unknown content.
3120 case bitc::MODULE_CODE_VERSION: {
3121 Expected<unsigned> VersionOrErr = parseVersionRecord(Record);
3122 if (!VersionOrErr)
3123 return VersionOrErr.takeError();
3124 UseRelativeIDs = *VersionOrErr >= 1;
3125 break;
3126 }
3127 case bitc::MODULE_CODE_TRIPLE: { // TRIPLE: [strchr x N]
3128 std::string S;
3129 if (convertToString(Record, 0, S))
3130 return error("Invalid record");
3131 TheModule->setTargetTriple(S);
3132 break;
3133 }
3134 case bitc::MODULE_CODE_DATALAYOUT: { // DATALAYOUT: [strchr x N]
3135 std::string S;
3136 if (convertToString(Record, 0, S))
3137 return error("Invalid record");
3138 TheModule->setDataLayout(S);
3139 break;
3140 }
3141 case bitc::MODULE_CODE_ASM: { // ASM: [strchr x N]
3142 std::string S;
3143 if (convertToString(Record, 0, S))
3144 return error("Invalid record");
3145 TheModule->setModuleInlineAsm(S);
3146 break;
3147 }
3148 case bitc::MODULE_CODE_DEPLIB: { // DEPLIB: [strchr x N]
3149 // FIXME: Remove in 4.0.
3150 std::string S;
3151 if (convertToString(Record, 0, S))
3152 return error("Invalid record");
3153 // Ignore value.
3154 break;
3155 }
3156 case bitc::MODULE_CODE_SECTIONNAME: { // SECTIONNAME: [strchr x N]
3157 std::string S;
3158 if (convertToString(Record, 0, S))
3159 return error("Invalid record");
3160 SectionTable.push_back(S);
3161 break;
3162 }
3163 case bitc::MODULE_CODE_GCNAME: { // SECTIONNAME: [strchr x N]
3164 std::string S;
3165 if (convertToString(Record, 0, S))
3166 return error("Invalid record");
3167 GCTable.push_back(S);
3168 break;
3169 }
3170 case bitc::MODULE_CODE_COMDAT: {
3171 if (Error Err = parseComdatRecord(Record))
3172 return Err;
3173 break;
3174 }
3175 case bitc::MODULE_CODE_GLOBALVAR: {
3176 if (Error Err = parseGlobalVarRecord(Record))
3177 return Err;
3178 break;
3179 }
3180 case bitc::MODULE_CODE_FUNCTION: {
3181 if (Error Err = parseFunctionRecord(Record))
3182 return Err;
3183 break;
3184 }
3185 case bitc::MODULE_CODE_IFUNC:
3186 case bitc::MODULE_CODE_ALIAS:
3187 case bitc::MODULE_CODE_ALIAS_OLD: {
3188 if (Error Err = parseGlobalIndirectSymbolRecord(BitCode, Record))
3189 return Err;
3190 break;
3191 }
3192 /// MODULE_CODE_VSTOFFSET: [offset]
3193 case bitc::MODULE_CODE_VSTOFFSET:
3194 if (Record.size() < 1)
3195 return error("Invalid record");
3196 // Note that we subtract 1 here because the offset is relative to one word
3197 // before the start of the identification or module block, which was
3198 // historically always the start of the regular bitcode header.
3199 VSTOffset = Record[0] - 1;
3200 break;
3201 /// MODULE_CODE_SOURCE_FILENAME: [namechar x N]
3202 case bitc::MODULE_CODE_SOURCE_FILENAME:
3203 SmallString<128> ValueName;
3204 if (convertToString(Record, 0, ValueName))
3205 return error("Invalid record");
3206 TheModule->setSourceFileName(ValueName);
3207 break;
3208 }
3209 Record.clear();
3210 }
3211}
3212
3213Error BitcodeReader::parseBitcodeInto(Module *M, bool ShouldLazyLoadMetadata,
3214 bool IsImporting) {
3215 TheModule = M;
3216 MDLoader = MetadataLoader(Stream, *M, ValueList, IsImporting,
3217 [&](unsigned ID) { return getTypeByID(ID); });
3218 return parseModule(0, ShouldLazyLoadMetadata);
3219}
3220
3221
3222Error BitcodeReader::typeCheckLoadStoreInst(Type *ValType, Type *PtrType) {
3223 if (!isa<PointerType>(PtrType))
3224 return error("Load/Store operand is not a pointer type");
3225 Type *ElemType = cast<PointerType>(PtrType)->getElementType();
3226
3227 if (ValType && ValType != ElemType)
3228 return error("Explicit load/store type does not match pointee "
3229 "type of pointer operand");
3230 if (!PointerType::isLoadableOrStorableType(ElemType))
3231 return error("Cannot load/store from pointer");
3232 return Error::success();
3233}
3234
3235/// Lazily parse the specified function body block.
3236Error BitcodeReader::parseFunctionBody(Function *F) {
3237 if (Stream.EnterSubBlock(bitc::FUNCTION_BLOCK_ID))
3238 return error("Invalid record");
3239
3240 // Unexpected unresolved metadata when parsing function.
3241 if (MDLoader->hasFwdRefs())
3242 return error("Invalid function metadata: incoming forward references");
3243
3244 InstructionList.clear();
3245 unsigned ModuleValueListSize = ValueList.size();
3246 unsigned ModuleMDLoaderSize = MDLoader->size();
3247
3248 // Add all the function arguments to the value table.
3249 for (Argument &I : F->args())
3250 ValueList.push_back(&I);
3251
3252 unsigned NextValueNo = ValueList.size();
3253 BasicBlock *CurBB = nullptr;
3254 unsigned CurBBNo = 0;
3255
3256 DebugLoc LastLoc;
3257 auto getLastInstruction = [&]() -> Instruction * {
3258 if (CurBB && !CurBB->empty())
3259 return &CurBB->back();
3260 else if (CurBBNo && FunctionBBs[CurBBNo - 1] &&
3261 !FunctionBBs[CurBBNo - 1]->empty())
3262 return &FunctionBBs[CurBBNo - 1]->back();
3263 return nullptr;
3264 };
3265
3266 std::vector<OperandBundleDef> OperandBundles;
3267
3268 // Read all the records.
3269 SmallVector<uint64_t, 64> Record;
3270
3271 while (true) {
3272 BitstreamEntry Entry = Stream.advance();
3273
3274 switch (Entry.Kind) {
3275 case BitstreamEntry::Error:
3276 return error("Malformed block");
3277 case BitstreamEntry::EndBlock:
3278 goto OutOfRecordLoop;
3279
3280 case BitstreamEntry::SubBlock:
3281 switch (Entry.ID) {
3282 default: // Skip unknown content.
3283 if (Stream.SkipBlock())
3284 return error("Invalid record");
3285 break;
3286 case bitc::CONSTANTS_BLOCK_ID:
3287 if (Error Err = parseConstants())
3288 return Err;
3289 NextValueNo = ValueList.size();
3290 break;
3291 case bitc::VALUE_SYMTAB_BLOCK_ID:
3292 if (Error Err = parseValueSymbolTable())
3293 return Err;
3294 break;
3295 case bitc::METADATA_ATTACHMENT_ID:
3296 if (Error Err = MDLoader->parseMetadataAttachment(*F, InstructionList))
3297 return Err;
3298 break;
3299 case bitc::METADATA_BLOCK_ID:
3300 assert(DeferredMetadataInfo.empty() &&((DeferredMetadataInfo.empty() && "Must read all module-level metadata before function-level"
) ? static_cast<void> (0) : __assert_fail ("DeferredMetadataInfo.empty() && \"Must read all module-level metadata before function-level\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301769/lib/Bitcode/Reader/BitcodeReader.cpp"
, 3301, __PRETTY_FUNCTION__))
3301 "Must read all module-level metadata before function-level")((DeferredMetadataInfo.empty() && "Must read all module-level metadata before function-level"
) ? static_cast<void> (0) : __assert_fail ("DeferredMetadataInfo.empty() && \"Must read all module-level metadata before function-level\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301769/lib/Bitcode/Reader/BitcodeReader.cpp"
, 3301, __PRETTY_FUNCTION__))
;
3302 if (Error Err = MDLoader->parseFunctionMetadata())
3303 return Err;
3304 break;
3305 case bitc::USELIST_BLOCK_ID:
3306 if (Error Err = parseUseLists())
3307 return Err;
3308 break;
3309 }
3310 continue;
3311
3312 case BitstreamEntry::Record:
3313 // The interesting case.
3314 break;
3315 }
3316
3317 // Read a record.
3318 Record.clear();
3319 Instruction *I = nullptr;
3320 unsigned BitCode = Stream.readRecord(Entry.ID, Record);
3321 switch (BitCode) {
3322 default: // Default behavior: reject
3323 return error("Invalid value");
3324 case bitc::FUNC_CODE_DECLAREBLOCKS: { // DECLAREBLOCKS: [nblocks]
3325 if (Record.size() < 1 || Record[0] == 0)
3326 return error("Invalid record");
3327 // Create all the basic blocks for the function.
3328 FunctionBBs.resize(Record[0]);
3329
3330 // See if anything took the address of blocks in this function.
3331 auto BBFRI = BasicBlockFwdRefs.find(F);
3332 if (BBFRI == BasicBlockFwdRefs.end()) {
3333 for (unsigned i = 0, e = FunctionBBs.size(); i != e; ++i)
3334 FunctionBBs[i] = BasicBlock::Create(Context, "", F);
3335 } else {
3336 auto &BBRefs = BBFRI->second;
3337 // Check for invalid basic block references.
3338 if (BBRefs.size() > FunctionBBs.size())
3339 return error("Invalid ID");
3340 assert(!BBRefs.empty() && "Unexpected empty array")((!BBRefs.empty() && "Unexpected empty array") ? static_cast
<void> (0) : __assert_fail ("!BBRefs.empty() && \"Unexpected empty array\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301769/lib/Bitcode/Reader/BitcodeReader.cpp"
, 3340, __PRETTY_FUNCTION__))
;
3341 assert(!BBRefs.front() && "Invalid reference to entry block")((!BBRefs.front() && "Invalid reference to entry block"
) ? static_cast<void> (0) : __assert_fail ("!BBRefs.front() && \"Invalid reference to entry block\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301769/lib/Bitcode/Reader/BitcodeReader.cpp"
, 3341, __PRETTY_FUNCTION__))
;
3342 for (unsigned I = 0, E = FunctionBBs.size(), RE = BBRefs.size(); I != E;
3343 ++I)
3344 if (I < RE && BBRefs[I]) {
3345 BBRefs[I]->insertInto(F);
3346 FunctionBBs[I] = BBRefs[I];
3347 } else {
3348 FunctionBBs[I] = BasicBlock::Create(Context, "", F);
3349 }
3350
3351 // Erase from the table.
3352 BasicBlockFwdRefs.erase(BBFRI);
3353 }
3354
3355 CurBB = FunctionBBs[0];
3356 continue;
3357 }
3358
3359 case bitc::FUNC_CODE_DEBUG_LOC_AGAIN: // DEBUG_LOC_AGAIN
3360 // This record indicates that the last instruction is at the same
3361 // location as the previous instruction with a location.
3362 I = getLastInstruction();
3363
3364 if (!I)
3365 return error("Invalid record");
3366 I->setDebugLoc(LastLoc);
3367 I = nullptr;
3368 continue;
3369
3370 case bitc::FUNC_CODE_DEBUG_LOC: { // DEBUG_LOC: [line, col, scope, ia]
3371 I = getLastInstruction();
3372 if (!I || Record.size() < 4)
3373 return error("Invalid record");
3374
3375 unsigned Line = Record[0], Col = Record[1];
3376 unsigned ScopeID = Record[2], IAID = Record[3];
3377
3378 MDNode *Scope = nullptr, *IA = nullptr;
3379 if (ScopeID) {
3380 Scope = MDLoader->getMDNodeFwdRefOrNull(ScopeID - 1);
3381 if (!Scope)
3382 return error("Invalid record");
3383 }
3384 if (IAID) {
3385 IA = MDLoader->getMDNodeFwdRefOrNull(IAID - 1);
3386 if (!IA)
3387 return error("Invalid record");
3388 }
3389 LastLoc = DebugLoc::get(Line, Col, Scope, IA);
3390 I->setDebugLoc(LastLoc);
3391 I = nullptr;
3392 continue;
3393 }
3394
3395 case bitc::FUNC_CODE_INST_BINOP: { // BINOP: [opval, ty, opval, opcode]
3396 unsigned OpNum = 0;
3397 Value *LHS, *RHS;
3398 if (getValueTypePair(Record, OpNum, NextValueNo, LHS) ||
3399 popValue(Record, OpNum, NextValueNo, LHS->getType(), RHS) ||
3400 OpNum+1 > Record.size())
3401 return error("Invalid record");
3402
3403 int Opc = getDecodedBinaryOpcode(Record[OpNum++], LHS->getType());
3404 if (Opc == -1)
3405 return error("Invalid record");
3406 I = BinaryOperator::Create((Instruction::BinaryOps)Opc, LHS, RHS);
3407 InstructionList.push_back(I);
3408 if (OpNum < Record.size()) {
3409 if (Opc == Instruction::Add ||
3410 Opc == Instruction::Sub ||
3411 Opc == Instruction::Mul ||
3412 Opc == Instruction::Shl) {
3413 if (Record[OpNum] & (1 << bitc::OBO_NO_SIGNED_WRAP))
3414 cast<BinaryOperator>(I)->setHasNoSignedWrap(true);
3415 if (Record[OpNum] & (1 << bitc::OBO_NO_UNSIGNED_WRAP))
3416 cast<BinaryOperator>(I)->setHasNoUnsignedWrap(true);
3417 } else if (Opc == Instruction::SDiv ||
3418 Opc == Instruction::UDiv ||
3419 Opc == Instruction::LShr ||
3420 Opc == Instruction::AShr) {
3421 if (Record[OpNum] & (1 << bitc::PEO_EXACT))
3422 cast<BinaryOperator>(I)->setIsExact(true);
3423 } else if (isa<FPMathOperator>(I)) {
3424 FastMathFlags FMF = getDecodedFastMathFlags(Record[OpNum]);
3425 if (FMF.any())
3426 I->setFastMathFlags(FMF);
3427 }
3428
3429 }
3430 break;
3431 }
3432 case bitc::FUNC_CODE_INST_CAST: { // CAST: [opval, opty, destty, castopc]
3433 unsigned OpNum = 0;
3434 Value *Op;
3435 if (getValueTypePair(Record, OpNum, NextValueNo, Op) ||
3436 OpNum+2 != Record.size())
3437 return error("Invalid record");
3438
3439 Type *ResTy = getTypeByID(Record[OpNum]);
3440 int Opc = getDecodedCastOpcode(Record[OpNum + 1]);
3441 if (Opc == -1 || !ResTy)
3442 return error("Invalid record");
3443 Instruction *Temp = nullptr;
3444 if ((I = UpgradeBitCastInst(Opc, Op, ResTy, Temp))) {
3445 if (Temp) {
3446 InstructionList.push_back(Temp);
3447 CurBB->getInstList().push_back(Temp);
3448 }
3449 } else {
3450 auto CastOp = (Instruction::CastOps)Opc;
3451 if (!CastInst::castIsValid(CastOp, Op, ResTy))
3452 return error("Invalid cast");
3453 I = CastInst::Create(CastOp, Op, ResTy);
3454 }
3455 InstructionList.push_back(I);
3456 break;
3457 }
3458 case bitc::FUNC_CODE_INST_INBOUNDS_GEP_OLD:
3459 case bitc::FUNC_CODE_INST_GEP_OLD:
3460 case bitc::FUNC_CODE_INST_GEP: { // GEP: type, [n x operands]
3461 unsigned OpNum = 0;
3462
3463 Type *Ty;
3464 bool InBounds;
3465
3466 if (BitCode == bitc::FUNC_CODE_INST_GEP) {
3467 InBounds = Record[OpNum++];
3468 Ty = getTypeByID(Record[OpNum++]);
3469 } else {
3470 InBounds = BitCode == bitc::FUNC_CODE_INST_INBOUNDS_GEP_OLD;
3471 Ty = nullptr;
3472 }
3473
3474 Value *BasePtr;
3475 if (getValueTypePair(Record, OpNum, NextValueNo, BasePtr))
3476 return error("Invalid record");
3477
3478 if (!Ty)
3479 Ty = cast<PointerType>(BasePtr->getType()->getScalarType())
3480 ->getElementType();
3481 else if (Ty !=
3482 cast<PointerType>(BasePtr->getType()->getScalarType())
3483 ->getElementType())
3484 return error(
3485 "Explicit gep type does not match pointee type of pointer operand");
3486
3487 SmallVector<Value*, 16> GEPIdx;
3488 while (OpNum != Record.size()) {
3489 Value *Op;
3490 if (getValueTypePair(Record, OpNum, NextValueNo, Op))
3491 return error("Invalid record");
3492 GEPIdx.push_back(Op);
3493 }
3494
3495 I = GetElementPtrInst::Create(Ty, BasePtr, GEPIdx);
3496
3497 InstructionList.push_back(I);
3498 if (InBounds)
3499 cast<GetElementPtrInst>(I)->setIsInBounds(true);
3500 break;
3501 }
3502
3503 case bitc::FUNC_CODE_INST_EXTRACTVAL: {
3504 // EXTRACTVAL: [opty, opval, n x indices]
3505 unsigned OpNum = 0;
3506 Value *Agg;
3507 if (getValueTypePair(Record, OpNum, NextValueNo, Agg))
3508 return error("Invalid record");
3509
3510 unsigned RecSize = Record.size();
3511 if (OpNum == RecSize)
3512 return error("EXTRACTVAL: Invalid instruction with 0 indices");
3513
3514 SmallVector<unsigned, 4> EXTRACTVALIdx;
3515 Type *CurTy = Agg->getType();
3516 for (; OpNum != RecSize; ++OpNum) {
3517 bool IsArray = CurTy->isArrayTy();
3518 bool IsStruct = CurTy->isStructTy();
3519 uint64_t Index = Record[OpNum];
3520
3521 if (!IsStruct && !IsArray)
3522 return error("EXTRACTVAL: Invalid type");
3523 if ((unsigned)Index != Index)
3524 return error("Invalid value");
3525 if (IsStruct && Index >= CurTy->subtypes().size())
3526 return error("EXTRACTVAL: Invalid struct index");
3527 if (IsArray && Index >= CurTy->getArrayNumElements())
3528 return error("EXTRACTVAL: Invalid array index");
3529 EXTRACTVALIdx.push_back((unsigned)Index);
3530
3531 if (IsStruct)
3532 CurTy = CurTy->subtypes()[Index];
3533 else
3534 CurTy = CurTy->subtypes()[0];
3535 }
3536
3537 I = ExtractValueInst::Create(Agg, EXTRACTVALIdx);
3538 InstructionList.push_back(I);
3539 break;
3540 }
3541
3542 case bitc::FUNC_CODE_INST_INSERTVAL: {
3543 // INSERTVAL: [opty, opval, opty, opval, n x indices]
3544 unsigned OpNum = 0;
3545 Value *Agg;
3546 if (getValueTypePair(Record, OpNum, NextValueNo, Agg))
3547 return error("Invalid record");
3548 Value *Val;
3549 if (getValueTypePair(Record, OpNum, NextValueNo, Val))
3550 return error("Invalid record");
3551
3552 unsigned RecSize = Record.size();
3553 if (OpNum == RecSize)
3554 return error("INSERTVAL: Invalid instruction with 0 indices");
3555
3556 SmallVector<unsigned, 4> INSERTVALIdx;
3557 Type *CurTy = Agg->getType();
3558 for (; OpNum != RecSize; ++OpNum) {
3559 bool IsArray = CurTy->isArrayTy();
3560 bool IsStruct = CurTy->isStructTy();
3561 uint64_t Index = Record[OpNum];
3562
3563 if (!IsStruct && !IsArray)
3564 return error("INSERTVAL: Invalid type");
3565 if ((unsigned)Index != Index)
3566 return error("Invalid value");
3567 if (IsStruct && Index >= CurTy->subtypes().size())
3568 return error("INSERTVAL: Invalid struct index");
3569 if (IsArray && Index >= CurTy->getArrayNumElements())
3570 return error("INSERTVAL: Invalid array index");
3571
3572 INSERTVALIdx.push_back((unsigned)Index);
3573 if (IsStruct)
3574 CurTy = CurTy->subtypes()[Index];
3575 else
3576 CurTy = CurTy->subtypes()[0];
3577 }
3578
3579 if (CurTy != Val->getType())
3580 return error("Inserted value type doesn't match aggregate type");
3581
3582 I = InsertValueInst::Create(Agg, Val, INSERTVALIdx);
3583 InstructionList.push_back(I);
3584 break;
3585 }
3586
3587 case bitc::FUNC_CODE_INST_SELECT: { // SELECT: [opval, ty, opval, opval]
3588 // obsolete form of select
3589 // handles select i1 ... in old bitcode
3590 unsigned OpNum = 0;
3591 Value *TrueVal, *FalseVal, *Cond;
3592 if (getValueTypePair(Record, OpNum, NextValueNo, TrueVal) ||
3593 popValue(Record, OpNum, NextValueNo, TrueVal->getType(), FalseVal) ||
3594 popValue(Record, OpNum, NextValueNo, Type::getInt1Ty(Context), Cond))
3595 return error("Invalid record");
3596
3597 I = SelectInst::Create(Cond, TrueVal, FalseVal);
3598 InstructionList.push_back(I);
3599 break;
3600 }
3601
3602 case bitc::FUNC_CODE_INST_VSELECT: {// VSELECT: [ty,opval,opval,predty,pred]
3603 // new form of select
3604 // handles select i1 or select [N x i1]
3605 unsigned OpNum = 0;
3606 Value *TrueVal, *FalseVal, *Cond;
3607 if (getValueTypePair(Record, OpNum, NextValueNo, TrueVal) ||
3608 popValue(Record, OpNum, NextValueNo, TrueVal->getType(), FalseVal) ||
3609 getValueTypePair(Record, OpNum, NextValueNo, Cond))
3610 return error("Invalid record");
3611
3612 // select condition can be either i1 or [N x i1]
3613 if (VectorType* vector_type =
3614 dyn_cast<VectorType>(Cond->getType())) {
3615 // expect <n x i1>
3616 if (vector_type->getElementType() != Type::getInt1Ty(Context))
3617 return error("Invalid type for value");
3618 } else {
3619 // expect i1
3620 if (Cond->getType() != Type::getInt1Ty(Context))
3621 return error("Invalid type for value");
3622 }
3623
3624 I = SelectInst::Create(Cond, TrueVal, FalseVal);
3625 InstructionList.push_back(I);
3626 break;
3627 }
3628
3629 case bitc::FUNC_CODE_INST_EXTRACTELT: { // EXTRACTELT: [opty, opval, opval]
3630 unsigned OpNum = 0;
3631 Value *Vec, *Idx;
3632 if (getValueTypePair(Record, OpNum, NextValueNo, Vec) ||
3633 getValueTypePair(Record, OpNum, NextValueNo, Idx))
3634 return error("Invalid record");
3635 if (!Vec->getType()->isVectorTy())
3636 return error("Invalid type for value");
3637 I = ExtractElementInst::Create(Vec, Idx);
3638 InstructionList.push_back(I);
3639 break;
3640 }
3641
3642 case bitc::FUNC_CODE_INST_INSERTELT: { // INSERTELT: [ty, opval,opval,opval]
3643 unsigned OpNum = 0;
3644 Value *Vec, *Elt, *Idx;
3645 if (getValueTypePair(Record, OpNum, NextValueNo, Vec))
3646 return error("Invalid record");
3647 if (!Vec->getType()->isVectorTy())
3648 return error("Invalid type for value");
3649 if (popValue(Record, OpNum, NextValueNo,
3650 cast<VectorType>(Vec->getType())->getElementType(), Elt) ||
3651 getValueTypePair(Record, OpNum, NextValueNo, Idx))
3652 return error("Invalid record");
3653 I = InsertElementInst::Create(Vec, Elt, Idx);
3654 InstructionList.push_back(I);
3655 break;
3656 }
3657
3658 case bitc::FUNC_CODE_INST_SHUFFLEVEC: {// SHUFFLEVEC: [opval,ty,opval,opval]
3659 unsigned OpNum = 0;
3660 Value *Vec1, *Vec2, *Mask;
3661 if (getValueTypePair(Record, OpNum, NextValueNo, Vec1) ||
3662 popValue(Record, OpNum, NextValueNo, Vec1->getType(), Vec2))
3663 return error("Invalid record");
3664
3665 if (getValueTypePair(Record, OpNum, NextValueNo, Mask))
3666 return error("Invalid record");
3667 if (!Vec1->getType()->isVectorTy() || !Vec2->getType()->isVectorTy())
3668 return error("Invalid type for value");
3669 I = new ShuffleVectorInst(Vec1, Vec2, Mask);
3670 InstructionList.push_back(I);
3671 break;
3672 }
3673
3674 case bitc::FUNC_CODE_INST_CMP: // CMP: [opty, opval, opval, pred]
3675 // Old form of ICmp/FCmp returning bool
3676 // Existed to differentiate between icmp/fcmp and vicmp/vfcmp which were
3677 // both legal on vectors but had different behaviour.
3678 case bitc::FUNC_CODE_INST_CMP2: { // CMP2: [opty, opval, opval, pred]
3679 // FCmp/ICmp returning bool or vector of bool
3680
3681 unsigned OpNum = 0;
3682 Value *LHS, *RHS;
3683 if (getValueTypePair(Record, OpNum, NextValueNo, LHS) ||
3684 popValue(Record, OpNum, NextValueNo, LHS->getType(), RHS))
3685 return error("Invalid record");
3686
3687 unsigned PredVal = Record[OpNum];
3688 bool IsFP = LHS->getType()->isFPOrFPVectorTy();
3689 FastMathFlags FMF;
3690 if (IsFP && Record.size() > OpNum+1)
3691 FMF = getDecodedFastMathFlags(Record[++OpNum]);
3692
3693 if (OpNum+1 != Record.size())
3694 return error("Invalid record");
3695
3696 if (LHS->getType()->isFPOrFPVectorTy())
3697 I = new FCmpInst((FCmpInst::Predicate)PredVal, LHS, RHS);
3698 else
3699 I = new ICmpInst((ICmpInst::Predicate)PredVal, LHS, RHS);
3700
3701 if (FMF.any())
3702 I->setFastMathFlags(FMF);
3703 InstructionList.push_back(I);
3704 break;
3705 }
3706
3707 case bitc::FUNC_CODE_INST_RET: // RET: [opty,opval<optional>]
3708 {
3709 unsigned Size = Record.size();
3710 if (Size == 0) {
3711 I = ReturnInst::Create(Context);
3712 InstructionList.push_back(I);
3713 break;
3714 }
3715
3716 unsigned OpNum = 0;
3717 Value *Op = nullptr;
3718 if (getValueTypePair(Record, OpNum, NextValueNo, Op))
3719 return error("Invalid record");
3720 if (OpNum != Record.size())
3721 return error("Invalid record");
3722
3723 I = ReturnInst::Create(Context, Op);
3724 InstructionList.push_back(I);
3725 break;
3726 }
3727 case bitc::FUNC_CODE_INST_BR: { // BR: [bb#, bb#, opval] or [bb#]
3728 if (Record.size() != 1 && Record.size() != 3)
3729 return error("Invalid record");
3730 BasicBlock *TrueDest = getBasicBlock(Record[0]);
3731 if (!TrueDest)
3732 return error("Invalid record");
3733
3734 if (Record.size() == 1) {
3735 I = BranchInst::Create(TrueDest);
3736 InstructionList.push_back(I);
3737 }
3738 else {
3739 BasicBlock *FalseDest = getBasicBlock(Record[1]);
3740 Value *Cond = getValue(Record, 2, NextValueNo,
3741 Type::getInt1Ty(Context));
3742 if (!FalseDest || !Cond)
3743 return error("Invalid record");
3744 I = BranchInst::Create(TrueDest, FalseDest, Cond);
3745 InstructionList.push_back(I);
3746 }
3747 break;
3748 }
3749 case bitc::FUNC_CODE_INST_CLEANUPRET: { // CLEANUPRET: [val] or [val,bb#]
3750 if (Record.size() != 1 && Record.size() != 2)
3751 return error("Invalid record");
3752 unsigned Idx = 0;
3753 Value *CleanupPad =
3754 getValue(Record, Idx++, NextValueNo, Type::getTokenTy(Context));
3755 if (!CleanupPad)
3756 return error("Invalid record");
3757 BasicBlock *UnwindDest = nullptr;
3758 if (Record.size() == 2) {
3759 UnwindDest = getBasicBlock(Record[Idx++]);
3760 if (!UnwindDest)
3761 return error("Invalid record");
3762 }
3763
3764 I = CleanupReturnInst::Create(CleanupPad, UnwindDest);
3765 InstructionList.push_back(I);
3766 break;
3767 }
3768 case bitc::FUNC_CODE_INST_CATCHRET: { // CATCHRET: [val,bb#]
3769 if (Record.size() != 2)
3770 return error("Invalid record");
3771 unsigned Idx = 0;
3772 Value *CatchPad =
3773 getValue(Record, Idx++, NextValueNo, Type::getTokenTy(Context));
3774 if (!CatchPad)
3775 return error("Invalid record");
3776 BasicBlock *BB = getBasicBlock(Record[Idx++]);
3777 if (!BB)
3778 return error("Invalid record");
3779
3780 I = CatchReturnInst::Create(CatchPad, BB);
3781 InstructionList.push_back(I);
3782 break;
3783 }
3784 case bitc::FUNC_CODE_INST_CATCHSWITCH: { // CATCHSWITCH: [tok,num,(bb)*,bb?]
3785 // We must have, at minimum, the outer scope and the number of arguments.
3786 if (Record.size() < 2)
3787 return error("Invalid record");
3788
3789 unsigned Idx = 0;
3790
3791 Value *ParentPad =
3792 getValue(Record, Idx++, NextValueNo, Type::getTokenTy(Context));
3793
3794 unsigned NumHandlers = Record[Idx++];
3795
3796 SmallVector<BasicBlock *, 2> Handlers;
3797 for (unsigned Op = 0; Op != NumHandlers; ++Op) {
3798 BasicBlock *BB = getBasicBlock(Record[Idx++]);
3799 if (!BB)
3800 return error("Invalid record");
3801 Handlers.push_back(BB);
3802 }
3803
3804 BasicBlock *UnwindDest = nullptr;
3805 if (Idx + 1 == Record.size()) {
3806 UnwindDest = getBasicBlock(Record[Idx++]);
3807 if (!UnwindDest)
3808 return error("Invalid record");
3809 }
3810
3811 if (Record.size() != Idx)
3812 return error("Invalid record");
3813
3814 auto *CatchSwitch =
3815 CatchSwitchInst::Create(ParentPad, UnwindDest, NumHandlers);
3816 for (BasicBlock *Handler : Handlers)
3817 CatchSwitch->addHandler(Handler);
3818 I = CatchSwitch;
3819 InstructionList.push_back(I);
3820 break;
3821 }
3822 case bitc::FUNC_CODE_INST_CATCHPAD:
3823 case bitc::FUNC_CODE_INST_CLEANUPPAD: { // [tok,num,(ty,val)*]
3824 // We must have, at minimum, the outer scope and the number of arguments.
3825 if (Record.size() < 2)
3826 return error("Invalid record");
3827
3828 unsigned Idx = 0;
3829
3830 Value *ParentPad =
3831 getValue(Record, Idx++, NextValueNo, Type::getTokenTy(Context));
3832
3833 unsigned NumArgOperands = Record[Idx++];
3834
3835 SmallVector<Value *, 2> Args;
3836 for (unsigned Op = 0; Op != NumArgOperands; ++Op) {
3837 Value *Val;
3838 if (getValueTypePair(Record, Idx, NextValueNo, Val))
3839 return error("Invalid record");
3840 Args.push_back(Val);
3841 }
3842
3843 if (Record.size() != Idx)
3844 return error("Invalid record");
3845
3846 if (BitCode == bitc::FUNC_CODE_INST_CLEANUPPAD)
3847 I = CleanupPadInst::Create(ParentPad, Args);
3848 else
3849 I = CatchPadInst::Create(ParentPad, Args);
3850 InstructionList.push_back(I);
3851 break;
3852 }
3853 case bitc::FUNC_CODE_INST_SWITCH: { // SWITCH: [opty, op0, op1, ...]
3854 // Check magic
3855 if ((Record[0] >> 16) == SWITCH_INST_MAGIC) {
3856 // "New" SwitchInst format with case ranges. The changes to write this
3857 // format were reverted but we still recognize bitcode that uses it.
3858 // Hopefully someday we will have support for case ranges and can use
3859 // this format again.
3860
3861 Type *OpTy = getTypeByID(Record[1]);
3862 unsigned ValueBitWidth = cast<IntegerType>(OpTy)->getBitWidth();
3863
3864 Value *Cond = getValue(Record, 2, NextValueNo, OpTy);
3865 BasicBlock *Default = getBasicBlock(Record[3]);
3866 if (!OpTy || !Cond || !Default)
3867 return error("Invalid record");
3868
3869 unsigned NumCases = Record[4];
3870
3871 SwitchInst *SI = SwitchInst::Create(Cond, Default, NumCases);
3872 InstructionList.push_back(SI);
3873
3874 unsigned CurIdx = 5;
3875 for (unsigned i = 0; i != NumCases; ++i) {
3876 SmallVector<ConstantInt*, 1> CaseVals;
3877 unsigned NumItems = Record[CurIdx++];
3878 for (unsigned ci = 0; ci != NumItems; ++ci) {
3879 bool isSingleNumber = Record[CurIdx++];
3880
3881 APInt Low;
3882 unsigned ActiveWords = 1;
3883 if (ValueBitWidth > 64)
3884 ActiveWords = Record[CurIdx++];
3885 Low = readWideAPInt(makeArrayRef(&Record[CurIdx], ActiveWords),
3886 ValueBitWidth);
3887 CurIdx += ActiveWords;
3888
3889 if (!isSingleNumber) {
3890 ActiveWords = 1;
3891 if (ValueBitWidth > 64)
3892 ActiveWords = Record[CurIdx++];
3893 APInt High = readWideAPInt(
3894 makeArrayRef(&Record[CurIdx], ActiveWords), ValueBitWidth);
3895 CurIdx += ActiveWords;
3896
3897 // FIXME: It is not clear whether values in the range should be
3898 // compared as signed or unsigned values. The partially
3899 // implemented changes that used this format in the past used
3900 // unsigned comparisons.
3901 for ( ; Low.ule(High); ++Low)
3902 CaseVals.push_back(ConstantInt::get(Context, Low));
3903 } else
3904 CaseVals.push_back(ConstantInt::get(Context, Low));
3905 }
3906 BasicBlock *DestBB = getBasicBlock(Record[CurIdx++]);
3907 for (SmallVector<ConstantInt*, 1>::iterator cvi = CaseVals.begin(),
3908 cve = CaseVals.end(); cvi != cve; ++cvi)
3909 SI->addCase(*cvi, DestBB);
3910 }
3911 I = SI;
3912 break;
3913 }
3914
3915 // Old SwitchInst format without case ranges.
3916
3917 if (Record.size() < 3 || (Record.size() & 1) == 0)
3918 return error("Invalid record");
3919 Type *OpTy = getTypeByID(Record[0]);
3920 Value *Cond = getValue(Record, 1, NextValueNo, OpTy);
3921 BasicBlock *Default = getBasicBlock(Record[2]);
3922 if (!OpTy || !Cond || !Default)
3923 return error("Invalid record");
3924 unsigned NumCases = (Record.size()-3)/2;
3925 SwitchInst *SI = SwitchInst::Create(Cond, Default, NumCases);
3926 InstructionList.push_back(SI);
3927 for (unsigned i = 0, e = NumCases; i != e; ++i) {
3928 ConstantInt *CaseVal =
3929 dyn_cast_or_null<ConstantInt>(getFnValueByID(Record[3+i*2], OpTy));
3930 BasicBlock *DestBB = getBasicBlock(Record[1+3+i*2]);
3931 if (!CaseVal || !DestBB) {
3932 delete SI;
3933 return error("Invalid record");
3934 }
3935 SI->addCase(CaseVal, DestBB);
3936 }
3937 I = SI;
3938 break;
3939 }
3940 case bitc::FUNC_CODE_INST_INDIRECTBR: { // INDIRECTBR: [opty, op0, op1, ...]
3941 if (Record.size() < 2)
3942 return error("Invalid record");
3943 Type *OpTy = getTypeByID(Record[0]);
3944 Value *Address = getValue(Record, 1, NextValueNo, OpTy);
3945 if (!OpTy || !Address)
3946 return error("Invalid record");
3947 unsigned NumDests = Record.size()-2;
3948 IndirectBrInst *IBI = IndirectBrInst::Create(Address, NumDests);
3949 InstructionList.push_back(IBI);
3950 for (unsigned i = 0, e = NumDests; i != e; ++i) {
3951 if (BasicBlock *DestBB = getBasicBlock(Record[2+i])) {
3952 IBI->addDestination(DestBB);
3953 } else {
3954 delete IBI;
3955 return error("Invalid record");
3956 }
3957 }
3958 I = IBI;
3959 break;
3960 }
3961
3962 case bitc::FUNC_CODE_INST_INVOKE: {
3963 // INVOKE: [attrs, cc, normBB, unwindBB, fnty, op0,op1,op2, ...]
3964 if (Record.size() < 4)
3965 return error("Invalid record");
3966 unsigned OpNum = 0;
3967 AttributeList PAL = getAttributes(Record[OpNum++]);
3968 unsigned CCInfo = Record[OpNum++];
3969 BasicBlock *NormalBB = getBasicBlock(Record[OpNum++]);
3970 BasicBlock *UnwindBB = getBasicBlock(Record[OpNum++]);
3971
3972 FunctionType *FTy = nullptr;
3973 if (CCInfo >> 13 & 1 &&
3974 !(FTy = dyn_cast<FunctionType>(getTypeByID(Record[OpNum++]))))
3975 return error("Explicit invoke type is not a function type");
3976
3977 Value *Callee;
3978 if (getValueTypePair(Record, OpNum, NextValueNo, Callee))
3979 return error("Invalid record");
3980
3981 PointerType *CalleeTy = dyn_cast<PointerType>(Callee->getType());
3982 if (!CalleeTy)
3983 return error("Callee is not a pointer");
3984 if (!FTy) {
3985 FTy = dyn_cast<FunctionType>(CalleeTy->getElementType());
3986 if (!FTy)
3987 return error("Callee is not of pointer to function type");
3988 } else if (CalleeTy->getElementType() != FTy)
3989 return error("Explicit invoke type does not match pointee type of "
3990 "callee operand");
3991 if (Record.size() < FTy->getNumParams() + OpNum)
3992 return error("Insufficient operands to call");
3993
3994 SmallVector<Value*, 16> Ops;
3995 for (unsigned i = 0, e = FTy->getNumParams(); i != e; ++i, ++OpNum) {
3996 Ops.push_back(getValue(Record, OpNum, NextValueNo,
3997 FTy->getParamType(i)));
3998 if (!Ops.back())
3999 return error("Invalid record");
4000 }
4001
4002 if (!FTy->isVarArg()) {
4003 if (Record.size() != OpNum)
4004 return error("Invalid record");
4005 } else {
4006 // Read type/value pairs for varargs params.
4007 while (OpNum != Record.size()) {
4008 Value *Op;
4009 if (getValueTypePair(Record, OpNum, NextValueNo, Op))
4010 return error("Invalid record");
4011 Ops.push_back(Op);
4012 }
4013 }
4014
4015 I = InvokeInst::Create(Callee, NormalBB, UnwindBB, Ops, OperandBundles);
4016 OperandBundles.clear();
4017 InstructionList.push_back(I);
4018 cast<InvokeInst>(I)->setCallingConv(
4019 static_cast<CallingConv::ID>(CallingConv::MaxID & CCInfo));
4020 cast<InvokeInst>(I)->setAttributes(PAL);
4021 break;
4022 }
4023 case bitc::FUNC_CODE_INST_RESUME: { // RESUME: [opval]
4024 unsigned Idx = 0;
4025 Value *Val = nullptr;
4026 if (getValueTypePair(Record, Idx, NextValueNo, Val))
4027 return error("Invalid record");
4028 I = ResumeInst::Create(Val);
4029 InstructionList.push_back(I);
4030 break;
4031 }
4032 case bitc::FUNC_CODE_INST_UNREACHABLE: // UNREACHABLE
4033 I = new UnreachableInst(Context);
4034 InstructionList.push_back(I);
4035 break;
4036 case bitc::FUNC_CODE_INST_PHI: { // PHI: [ty, val0,bb0, ...]
4037 if (Record.size() < 1 || ((Record.size()-1)&1))
4038 return error("Invalid record");
4039 Type *Ty = getTypeByID(Record[0]);
4040 if (!Ty)
4041 return error("Invalid record");
4042
4043 PHINode *PN = PHINode::Create(Ty, (Record.size()-1)/2);
4044 InstructionList.push_back(PN);
4045
4046 for (unsigned i = 0, e = Record.size()-1; i != e; i += 2) {
4047 Value *V;
4048 // With the new function encoding, it is possible that operands have
4049 // negative IDs (for forward references). Use a signed VBR
4050 // representation to keep the encoding small.
4051 if (UseRelativeIDs)
4052 V = getValueSigned(Record, 1+i, NextValueNo, Ty);
4053 else
4054 V = getValue(Record, 1+i, NextValueNo, Ty);
4055 BasicBlock *BB = getBasicBlock(Record[2+i]);
4056 if (!V || !BB)
4057 return error("Invalid record");
4058 PN->addIncoming(V, BB);
4059 }
4060 I = PN;
4061 break;
4062 }
4063
4064 case bitc::FUNC_CODE_INST_LANDINGPAD:
4065 case bitc::FUNC_CODE_INST_LANDINGPAD_OLD: {
4066 // LANDINGPAD: [ty, val, val, num, (id0,val0 ...)?]
4067 unsigned Idx = 0;
4068 if (BitCode == bitc::FUNC_CODE_INST_LANDINGPAD) {
4069 if (Record.size() < 3)
4070 return error("Invalid record");
4071 } else {
4072 assert(BitCode == bitc::FUNC_CODE_INST_LANDINGPAD_OLD)((BitCode == bitc::FUNC_CODE_INST_LANDINGPAD_OLD) ? static_cast
<void> (0) : __assert_fail ("BitCode == bitc::FUNC_CODE_INST_LANDINGPAD_OLD"
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301769/lib/Bitcode/Reader/BitcodeReader.cpp"
, 4072, __PRETTY_FUNCTION__))
;
4073 if (Record.size() < 4)
4074 return error("Invalid record");
4075 }
4076 Type *Ty = getTypeByID(Record[Idx++]);
4077 if (!Ty)
4078 return error("Invalid record");
4079 if (BitCode == bitc::FUNC_CODE_INST_LANDINGPAD_OLD) {
4080 Value *PersFn = nullptr;
4081 if (getValueTypePair(Record, Idx, NextValueNo, PersFn))
4082 return error("Invalid record");
4083
4084 if (!F->hasPersonalityFn())
4085 F->setPersonalityFn(cast<Constant>(PersFn));
4086 else if (F->getPersonalityFn() != cast<Constant>(PersFn))
4087 return error("Personality function mismatch");
4088 }
4089
4090 bool IsCleanup = !!Record[Idx++];
4091 unsigned NumClauses = Record[Idx++];
4092 LandingPadInst *LP = LandingPadInst::Create(Ty, NumClauses);
4093 LP->setCleanup(IsCleanup);
4094 for (unsigned J = 0; J != NumClauses; ++J) {
4095 LandingPadInst::ClauseType CT =
4096 LandingPadInst::ClauseType(Record[Idx++]); (void)CT;
4097 Value *Val;
4098
4099 if (getValueTypePair(Record, Idx, NextValueNo, Val)) {
4100 delete LP;
4101 return error("Invalid record");
4102 }
4103
4104 assert((CT != LandingPadInst::Catch ||(((CT != LandingPadInst::Catch || !isa<ArrayType>(Val->
getType())) && "Catch clause has a invalid type!") ? static_cast
<void> (0) : __assert_fail ("(CT != LandingPadInst::Catch || !isa<ArrayType>(Val->getType())) && \"Catch clause has a invalid type!\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301769/lib/Bitcode/Reader/BitcodeReader.cpp"
, 4106, __PRETTY_FUNCTION__))
4105 !isa<ArrayType>(Val->getType())) &&(((CT != LandingPadInst::Catch || !isa<ArrayType>(Val->
getType())) && "Catch clause has a invalid type!") ? static_cast
<void> (0) : __assert_fail ("(CT != LandingPadInst::Catch || !isa<ArrayType>(Val->getType())) && \"Catch clause has a invalid type!\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301769/lib/Bitcode/Reader/BitcodeReader.cpp"
, 4106, __PRETTY_FUNCTION__))
4106 "Catch clause has a invalid type!")(((CT != LandingPadInst::Catch || !isa<ArrayType>(Val->
getType())) && "Catch clause has a invalid type!") ? static_cast
<void> (0) : __assert_fail ("(CT != LandingPadInst::Catch || !isa<ArrayType>(Val->getType())) && \"Catch clause has a invalid type!\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301769/lib/Bitcode/Reader/BitcodeReader.cpp"
, 4106, __PRETTY_FUNCTION__))
;
4107 assert((CT != LandingPadInst::Filter ||(((CT != LandingPadInst::Filter || isa<ArrayType>(Val->
getType())) && "Filter clause has invalid type!") ? static_cast
<void> (0) : __assert_fail ("(CT != LandingPadInst::Filter || isa<ArrayType>(Val->getType())) && \"Filter clause has invalid type!\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301769/lib/Bitcode/Reader/BitcodeReader.cpp"
, 4109, __PRETTY_FUNCTION__))
4108 isa<ArrayType>(Val->getType())) &&(((CT != LandingPadInst::Filter || isa<ArrayType>(Val->
getType())) && "Filter clause has invalid type!") ? static_cast
<void> (0) : __assert_fail ("(CT != LandingPadInst::Filter || isa<ArrayType>(Val->getType())) && \"Filter clause has invalid type!\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301769/lib/Bitcode/Reader/BitcodeReader.cpp"
, 4109, __PRETTY_FUNCTION__))
4109 "Filter clause has invalid type!")(((CT != LandingPadInst::Filter || isa<ArrayType>(Val->
getType())) && "Filter clause has invalid type!") ? static_cast
<void> (0) : __assert_fail ("(CT != LandingPadInst::Filter || isa<ArrayType>(Val->getType())) && \"Filter clause has invalid type!\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301769/lib/Bitcode/Reader/BitcodeReader.cpp"
, 4109, __PRETTY_FUNCTION__))
;
4110 LP->addClause(cast<Constant>(Val));
4111 }
4112
4113 I = LP;
4114 InstructionList.push_back(I);
4115 break;
4116 }
4117
4118 case bitc::FUNC_CODE_INST_ALLOCA: { // ALLOCA: [instty, opty, op, align]
4119 if (Record.size() != 4)
4120 return error("Invalid record");
4121 uint64_t AlignRecord = Record[3];
4122 const uint64_t InAllocaMask = uint64_t(1) << 5;
4123 const uint64_t ExplicitTypeMask = uint64_t(1) << 6;
4124 const uint64_t SwiftErrorMask = uint64_t(1) << 7;
4125 const uint64_t FlagMask = InAllocaMask | ExplicitTypeMask |
4126 SwiftErrorMask;
4127 bool InAlloca = AlignRecord & InAllocaMask;
4128 bool SwiftError = AlignRecord & SwiftErrorMask;
4129 Type *Ty = getTypeByID(Record[0]);
4130 if ((AlignRecord & ExplicitTypeMask) == 0) {
4131 auto *PTy = dyn_cast_or_null<PointerType>(Ty);
4132 if (!PTy)
4133 return error("Old-style alloca with a non-pointer type");
4134 Ty = PTy->getElementType();
4135 }
4136 Type *OpTy = getTypeByID(Record[1]);
4137 Value *Size = getFnValueByID(Record[2], OpTy);
4138 unsigned Align;
4139 if (Error Err = parseAlignmentValue(AlignRecord & ~FlagMask, Align)) {
4140 return Err;
4141 }
4142 if (!Ty || !Size)
4143 return error("Invalid record");
4144
4145 // FIXME: Make this an optional field.
4146 const DataLayout &DL = TheModule->getDataLayout();
4147 unsigned AS = DL.getAllocaAddrSpace();
4148
4149 AllocaInst *AI = new AllocaInst(Ty, AS, Size, Align);
4150 AI->setUsedWithInAlloca(InAlloca);
4151 AI->setSwiftError(SwiftError);
4152 I = AI;
4153 InstructionList.push_back(I);
4154 break;
4155 }
4156 case bitc::FUNC_CODE_INST_LOAD: { // LOAD: [opty, op, align, vol]
4157 unsigned OpNum = 0;
4158 Value *Op;
4159 if (getValueTypePair(Record, OpNum, NextValueNo, Op) ||
4160 (OpNum + 2 != Record.size() && OpNum + 3 != Record.size()))
4161 return error("Invalid record");
4162
4163 Type *Ty = nullptr;
4164 if (OpNum + 3 == Record.size())
4165 Ty = getTypeByID(Record[OpNum++]);
4166 if (Error Err = typeCheckLoadStoreInst(Ty, Op->getType()))
4167 return Err;
4168 if (!Ty)
4169 Ty = cast<PointerType>(Op->getType())->getElementType();
4170
4171 unsigned Align;
4172 if (Error Err = parseAlignmentValue(Record[OpNum], Align))
4173 return Err;
4174 I = new LoadInst(Ty, Op, "", Record[OpNum + 1], Align);
4175
4176 InstructionList.push_back(I);
4177 break;
4178 }
4179 case bitc::FUNC_CODE_INST_LOADATOMIC: {
4180 // LOADATOMIC: [opty, op, align, vol, ordering, synchscope]
4181 unsigned OpNum = 0;
4182 Value *Op;
4183 if (getValueTypePair(Record, OpNum, NextValueNo, Op) ||
4184 (OpNum + 4 != Record.size() && OpNum + 5 != Record.size()))
4185 return error("Invalid record");
4186
4187 Type *Ty = nullptr;
4188 if (OpNum + 5 == Record.size())
4189 Ty = getTypeByID(Record[OpNum++]);
4190 if (Error Err = typeCheckLoadStoreInst(Ty, Op->getType()))
4191 return Err;
4192 if (!Ty)
4193 Ty = cast<PointerType>(Op->getType())->getElementType();
Value stored to 'Ty' is never read
4194
4195 AtomicOrdering Ordering = getDecodedOrdering(Record[OpNum + 2]);
4196 if (Ordering == AtomicOrdering::NotAtomic ||
4197 Ordering == AtomicOrdering::Release ||
4198 Ordering == AtomicOrdering::AcquireRelease)
4199 return error("Invalid record");
4200 if (Ordering != AtomicOrdering::NotAtomic && Record[OpNum] == 0)
4201 return error("Invalid record");
4202 SynchronizationScope SynchScope = getDecodedSynchScope(Record[OpNum + 3]);
4203
4204 unsigned Align;
4205 if (Error Err = parseAlignmentValue(Record[OpNum], Align))
4206 return Err;
4207 I = new LoadInst(Op, "", Record[OpNum+1], Align, Ordering, SynchScope);
4208
4209 InstructionList.push_back(I);
4210 break;
4211 }
4212 case bitc::FUNC_CODE_INST_STORE:
4213 case bitc::FUNC_CODE_INST_STORE_OLD: { // STORE2:[ptrty, ptr, val, align, vol]
4214 unsigned OpNum = 0;
4215 Value *Val, *Ptr;
4216 if (getValueTypePair(Record, OpNum, NextValueNo, Ptr) ||
4217 (BitCode == bitc::FUNC_CODE_INST_STORE
4218 ? getValueTypePair(Record, OpNum, NextValueNo, Val)
4219 : popValue(Record, OpNum, NextValueNo,
4220 cast<PointerType>(Ptr->getType())->getElementType(),
4221 Val)) ||
4222 OpNum + 2 != Record.size())
4223 return error("Invalid record");
4224
4225 if (Error Err = typeCheckLoadStoreInst(Val->getType(), Ptr->getType()))
4226 return Err;
4227 unsigned Align;
4228 if (Error Err = parseAlignmentValue(Record[OpNum], Align))
4229 return Err;
4230 I = new StoreInst(Val, Ptr, Record[OpNum+1], Align);
4231 InstructionList.push_back(I);
4232 break;
4233 }
4234 case bitc::FUNC_CODE_INST_STOREATOMIC:
4235 case bitc::FUNC_CODE_INST_STOREATOMIC_OLD: {
4236 // STOREATOMIC: [ptrty, ptr, val, align, vol, ordering, synchscope]
4237 unsigned OpNum = 0;
4238 Value *Val, *Ptr;
4239 if (getValueTypePair(Record, OpNum, NextValueNo, Ptr) ||
4240 !isa<PointerType>(Ptr->getType()) ||
4241 (BitCode == bitc::FUNC_CODE_INST_STOREATOMIC
4242 ? getValueTypePair(Record, OpNum, NextValueNo, Val)
4243 : popValue(Record, OpNum, NextValueNo,
4244 cast<PointerType>(Ptr->getType())->getElementType(),
4245 Val)) ||
4246 OpNum + 4 != Record.size())
4247 return error("Invalid record");
4248
4249 if (Error Err = typeCheckLoadStoreInst(Val->getType(), Ptr->getType()))
4250 return Err;
4251 AtomicOrdering Ordering = getDecodedOrdering(Record[OpNum + 2]);
4252 if (Ordering == AtomicOrdering::NotAtomic ||
4253 Ordering == AtomicOrdering::Acquire ||
4254 Ordering == AtomicOrdering::AcquireRelease)
4255 return error("Invalid record");
4256 SynchronizationScope SynchScope = getDecodedSynchScope(Record[OpNum + 3]);
4257 if (Ordering != AtomicOrdering::NotAtomic && Record[OpNum] == 0)
4258 return error("Invalid record");
4259
4260 unsigned Align;
4261 if (Error Err = parseAlignmentValue(Record[OpNum], Align))
4262 return Err;
4263 I = new StoreInst(Val, Ptr, Record[OpNum+1], Align, Ordering, SynchScope);
4264 InstructionList.push_back(I);
4265 break;
4266 }
4267 case bitc::FUNC_CODE_INST_CMPXCHG_OLD:
4268 case bitc::FUNC_CODE_INST_CMPXCHG: {
4269 // CMPXCHG:[ptrty, ptr, cmp, new, vol, successordering, synchscope,
4270 // failureordering?, isweak?]
4271 unsigned OpNum = 0;
4272 Value *Ptr, *Cmp, *New;
4273 if (getValueTypePair(Record, OpNum, NextValueNo, Ptr) ||
4274 (BitCode == bitc::FUNC_CODE_INST_CMPXCHG
4275 ? getValueTypePair(Record, OpNum, NextValueNo, Cmp)
4276 : popValue(Record, OpNum, NextValueNo,
4277 cast<PointerType>(Ptr->getType())->getElementType(),
4278 Cmp)) ||
4279 popValue(Record, OpNum, NextValueNo, Cmp->getType(), New) ||
4280 Record.size() < OpNum + 3 || Record.size() > OpNum + 5)
4281 return error("Invalid record");
4282 AtomicOrdering SuccessOrdering = getDecodedOrdering(Record[OpNum + 1]);
4283 if (SuccessOrdering == AtomicOrdering::NotAtomic ||
4284 SuccessOrdering == AtomicOrdering::Unordered)
4285 return error("Invalid record");
4286 SynchronizationScope SynchScope = getDecodedSynchScope(Record[OpNum + 2]);
4287
4288 if (Error Err = typeCheckLoadStoreInst(Cmp->getType(), Ptr->getType()))
4289 return Err;
4290 AtomicOrdering FailureOrdering;
4291 if (Record.size() < 7)
4292 FailureOrdering =
4293 AtomicCmpXchgInst::getStrongestFailureOrdering(SuccessOrdering);
4294 else
4295 FailureOrdering = getDecodedOrdering(Record[OpNum + 3]);
4296
4297 I = new AtomicCmpXchgInst(Ptr, Cmp, New, SuccessOrdering, FailureOrdering,
4298 SynchScope);
4299 cast<AtomicCmpXchgInst>(I)->setVolatile(Record[OpNum]);
4300
4301 if (Record.size() < 8) {
4302 // Before weak cmpxchgs existed, the instruction simply returned the
4303 // value loaded from memory, so bitcode files from that era will be
4304 // expecting the first component of a modern cmpxchg.
4305 CurBB->getInstList().push_back(I);
4306 I = ExtractValueInst::Create(I, 0);
4307 } else {
4308 cast<AtomicCmpXchgInst>(I)->setWeak(Record[OpNum+4]);
4309 }
4310
4311 InstructionList.push_back(I);
4312 break;
4313 }
4314 case bitc::FUNC_CODE_INST_ATOMICRMW: {
4315 // ATOMICRMW:[ptrty, ptr, val, op, vol, ordering, synchscope]
4316 unsigned OpNum = 0;
4317 Value *Ptr, *Val;
4318 if (getValueTypePair(Record, OpNum, NextValueNo, Ptr) ||
4319 !isa<PointerType>(Ptr->getType()) ||
4320 popValue(Record, OpNum, NextValueNo,
4321 cast<PointerType>(Ptr->getType())->getElementType(), Val) ||
4322 OpNum+4 != Record.size())
4323 return error("Invalid record");
4324 AtomicRMWInst::BinOp Operation = getDecodedRMWOperation(Record[OpNum]);
4325 if (Operation < AtomicRMWInst::FIRST_BINOP ||
4326 Operation > AtomicRMWInst::LAST_BINOP)
4327 return error("Invalid record");
4328 AtomicOrdering Ordering = getDecodedOrdering(Record[OpNum + 2]);
4329 if (Ordering == AtomicOrdering::NotAtomic ||
4330 Ordering == AtomicOrdering::Unordered)
4331 return error("Invalid record");
4332 SynchronizationScope SynchScope = getDecodedSynchScope(Record[OpNum + 3]);
4333 I = new AtomicRMWInst(Operation, Ptr, Val, Ordering, SynchScope);
4334 cast<AtomicRMWInst>(I)->setVolatile(Record[OpNum+1]);
4335 InstructionList.push_back(I);
4336 break;
4337 }
4338 case bitc::FUNC_CODE_INST_FENCE: { // FENCE:[ordering, synchscope]
4339 if (2 != Record.size())
4340 return error("Invalid record");
4341 AtomicOrdering Ordering = getDecodedOrdering(Record[0]);
4342 if (Ordering == AtomicOrdering::NotAtomic ||
4343 Ordering == AtomicOrdering::Unordered ||
4344 Ordering == AtomicOrdering::Monotonic)
4345 return error("Invalid record");
4346 SynchronizationScope SynchScope = getDecodedSynchScope(Record[1]);
4347 I = new FenceInst(Context, Ordering, SynchScope);
4348 InstructionList.push_back(I);
4349 break;
4350 }
4351 case bitc::FUNC_CODE_INST_CALL: {
4352 // CALL: [paramattrs, cc, fmf, fnty, fnid, arg0, arg1...]
4353 if (Record.size() < 3)
4354 return error("Invalid record");
4355
4356 unsigned OpNum = 0;
4357 AttributeList PAL = getAttributes(Record[OpNum++]);
4358 unsigned CCInfo = Record[OpNum++];
4359
4360 FastMathFlags FMF;
4361 if ((CCInfo >> bitc::CALL_FMF) & 1) {
4362 FMF = getDecodedFastMathFlags(Record[OpNum++]);
4363 if (!FMF.any())
4364 return error("Fast math flags indicator set for call with no FMF");
4365 }
4366
4367 FunctionType *FTy = nullptr;
4368 if (CCInfo >> bitc::CALL_EXPLICIT_TYPE & 1 &&
4369 !(FTy = dyn_cast<FunctionType>(getTypeByID(Record[OpNum++]))))
4370 return error("Explicit call type is not a function type");
4371
4372 Value *Callee;
4373 if (getValueTypePair(Record, OpNum, NextValueNo, Callee))
4374 return error("Invalid record");
4375
4376 PointerType *OpTy = dyn_cast<PointerType>(Callee->getType());
4377 if (!OpTy)
4378 return error("Callee is not a pointer type");
4379 if (!FTy) {
4380 FTy = dyn_cast<FunctionType>(OpTy->getElementType());
4381 if (!FTy)
4382 return error("Callee is not of pointer to function type");
4383 } else if (OpTy->getElementType() != FTy)
4384 return error("Explicit call type does not match pointee type of "
4385 "callee operand");
4386 if (Record.size() < FTy->getNumParams() + OpNum)
4387 return error("Insufficient operands to call");
4388
4389 SmallVector<Value*, 16> Args;
4390 // Read the fixed params.
4391 for (unsigned i = 0, e = FTy->getNumParams(); i != e; ++i, ++OpNum) {
4392 if (FTy->getParamType(i)->isLabelTy())
4393 Args.push_back(getBasicBlock(Record[OpNum]));
4394 else
4395 Args.push_back(getValue(Record, OpNum, NextValueNo,
4396 FTy->getParamType(i)));
4397 if (!Args.back())
4398 return error("Invalid record");
4399 }
4400
4401 // Read type/value pairs for varargs params.
4402 if (!FTy->isVarArg()) {
4403 if (OpNum != Record.size())
4404 return error("Invalid record");
4405 } else {
4406 while (OpNum != Record.size()) {
4407 Value *Op;
4408 if (getValueTypePair(Record, OpNum, NextValueNo, Op))
4409 return error("Invalid record");
4410 Args.push_back(Op);
4411 }
4412 }
4413
4414 I = CallInst::Create(FTy, Callee, Args, OperandBundles);
4415 OperandBundles.clear();
4416 InstructionList.push_back(I);
4417 cast<CallInst>(I)->setCallingConv(
4418 static_cast<CallingConv::ID>((0x7ff & CCInfo) >> bitc::CALL_CCONV));
4419 CallInst::TailCallKind TCK = CallInst::TCK_None;
4420 if (CCInfo & 1 << bitc::CALL_TAIL)
4421 TCK = CallInst::TCK_Tail;
4422 if (CCInfo & (1 << bitc::CALL_MUSTTAIL))
4423 TCK = CallInst::TCK_MustTail;
4424 if (CCInfo & (1 << bitc::CALL_NOTAIL))
4425 TCK = CallInst::TCK_NoTail;
4426 cast<CallInst>(I)->setTailCallKind(TCK);
4427 cast<CallInst>(I)->setAttributes(PAL);
4428 if (FMF.any()) {
4429 if (!isa<FPMathOperator>(I))
4430 return error("Fast-math-flags specified for call without "
4431 "floating-point scalar or vector return type");
4432 I->setFastMathFlags(FMF);
4433 }
4434 break;
4435 }
4436 case bitc::FUNC_CODE_INST_VAARG: { // VAARG: [valistty, valist, instty]
4437 if (Record.size() < 3)
4438 return error("Invalid record");
4439 Type *OpTy = getTypeByID(Record[0]);
4440 Value *Op = getValue(Record, 1, NextValueNo, OpTy);
4441 Type *ResTy = getTypeByID(Record[2]);
4442 if (!OpTy || !Op || !ResTy)
4443 return error("Invalid record");
4444 I = new VAArgInst(Op, ResTy);
4445 InstructionList.push_back(I);
4446 break;
4447 }
4448
4449 case bitc::FUNC_CODE_OPERAND_BUNDLE: {
4450 // A call or an invoke can be optionally prefixed with some variable
4451 // number of operand bundle blocks. These blocks are read into
4452 // OperandBundles and consumed at the next call or invoke instruction.
4453
4454 if (Record.size() < 1 || Record[0] >= BundleTags.size())
4455 return error("Invalid record");
4456
4457 std::vector<Value *> Inputs;
4458
4459 unsigned OpNum = 1;
4460 while (OpNum != Record.size()) {
4461 Value *Op;
4462 if (getValueTypePair(Record, OpNum, NextValueNo, Op))
4463 return error("Invalid record");
4464 Inputs.push_back(Op);
4465 }
4466
4467 OperandBundles.emplace_back(BundleTags[Record[0]], std::move(Inputs));
4468 continue;
4469 }
4470 }
4471
4472 // Add instruction to end of current BB. If there is no current BB, reject
4473 // this file.
4474 if (!CurBB) {
4475 delete I;
4476 return error("Invalid instruction with no BB");
4477 }
4478 if (!OperandBundles.empty()) {
4479 delete I;
4480 return error("Operand bundles found with no consumer");
4481 }
4482 CurBB->getInstList().push_back(I);
4483
4484 // If this was a terminator instruction, move to the next block.
4485 if (isa<TerminatorInst>(I)) {
4486 ++CurBBNo;
4487 CurBB = CurBBNo < FunctionBBs.size() ? FunctionBBs[CurBBNo] : nullptr;
4488 }
4489
4490 // Non-void values get registered in the value table for future use.
4491 if (I && !I->getType()->isVoidTy())
4492 ValueList.assignValue(I, NextValueNo++);
4493 }
4494
4495OutOfRecordLoop:
4496
4497 if (!OperandBundles.empty())
4498 return error("Operand bundles found with no consumer");
4499
4500 // Check the function list for unresolved values.
4501 if (Argument *A = dyn_cast<Argument>(ValueList.back())) {
4502 if (!A->getParent()) {
4503 // We found at least one unresolved value. Nuke them all to avoid leaks.
4504 for (unsigned i = ModuleValueListSize, e = ValueList.size(); i != e; ++i){
4505 if ((A = dyn_cast_or_null<Argument>(ValueList[i])) && !A->getParent()) {
4506 A->replaceAllUsesWith(UndefValue::get(A->getType()));
4507 delete A;
4508 }
4509 }
4510 return error("Never resolved value found in function");
4511 }
4512 }
4513
4514 // Unexpected unresolved metadata about to be dropped.
4515 if (MDLoader->hasFwdRefs())
4516 return error("Invalid function metadata: outgoing forward refs");
4517
4518 // Trim the value list down to the size it was before we parsed this function.
4519 ValueList.shrinkTo(ModuleValueListSize);
4520 MDLoader->shrinkTo(ModuleMDLoaderSize);
4521 std::vector<BasicBlock*>().swap(FunctionBBs);
4522 return Error::success();
4523}
4524
4525/// Find the function body in the bitcode stream
4526Error BitcodeReader::findFunctionInStream(
4527 Function *F,
4528 DenseMap<Function *, uint64_t>::iterator DeferredFunctionInfoIterator) {
4529 while (DeferredFunctionInfoIterator->second == 0) {
4530 // This is the fallback handling for the old format bitcode that
4531 // didn't contain the function index in the VST, or when we have
4532 // an anonymous function which would not have a VST entry.
4533 // Assert that we have one of those two cases.
4534 assert(VSTOffset == 0 || !F->hasName())((VSTOffset == 0 || !F->hasName()) ? static_cast<void>
(0) : __assert_fail ("VSTOffset == 0 || !F->hasName()", "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301769/lib/Bitcode/Reader/BitcodeReader.cpp"
, 4534, __PRETTY_FUNCTION__))
;
4535 // Parse the next body in the stream and set its position in the
4536 // DeferredFunctionInfo map.
4537 if (Error Err = rememberAndSkipFunctionBodies())
4538 return Err;
4539 }
4540 return Error::success();
4541}
4542
4543//===----------------------------------------------------------------------===//
4544// GVMaterializer implementation
4545//===----------------------------------------------------------------------===//
4546
4547Error BitcodeReader::materialize(GlobalValue *GV) {
4548 Function *F = dyn_cast<Function>(GV);
4549 // If it's not a function or is already material, ignore the request.
4550 if (!F || !F->isMaterializable())
4551 return Error::success();
4552
4553 DenseMap<Function*, uint64_t>::iterator DFII = DeferredFunctionInfo.find(F);
4554 assert(DFII != DeferredFunctionInfo.end() && "Deferred function not found!")((DFII != DeferredFunctionInfo.end() && "Deferred function not found!"
) ? static_cast<void> (0) : __assert_fail ("DFII != DeferredFunctionInfo.end() && \"Deferred function not found!\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301769/lib/Bitcode/Reader/BitcodeReader.cpp"
, 4554, __PRETTY_FUNCTION__))
;
4555 // If its position is recorded as 0, its body is somewhere in the stream
4556 // but we haven't seen it yet.
4557 if (DFII->second == 0)
4558 if (Error Err = findFunctionInStream(F, DFII))
4559 return Err;
4560
4561 // Materialize metadata before parsing any function bodies.
4562 if (Error Err = materializeMetadata())
4563 return Err;
4564
4565 // Move the bit stream to the saved position of the deferred function body.
4566 Stream.JumpToBit(DFII->second);
4567
4568 if (Error Err = parseFunctionBody(F))
4569 return Err;
4570 F->setIsMaterializable(false);
4571
4572 if (StripDebugInfo)
4573 stripDebugInfo(*F);
4574
4575 // Upgrade any old intrinsic calls in the function.
4576 for (auto &I : UpgradedIntrinsics) {
4577 for (auto UI = I.first->materialized_user_begin(), UE = I.first->user_end();
4578 UI != UE;) {
4579 User *U = *UI;
4580 ++UI;
4581 if (CallInst *CI = dyn_cast<CallInst>(U))
4582 UpgradeIntrinsicCall(CI, I.second);
4583 }
4584 }
4585
4586 // Update calls to the remangled intrinsics
4587 for (auto &I : RemangledIntrinsics)
4588 for (auto UI = I.first->materialized_user_begin(), UE = I.first->user_end();
4589 UI != UE;)
4590 // Don't expect any other users than call sites
4591 CallSite(*UI++).setCalledFunction(I.second);
4592
4593 // Finish fn->subprogram upgrade for materialized functions.
4594 if (DISubprogram *SP = MDLoader->lookupSubprogramForFunction(F))
4595 F->setSubprogram(SP);
4596
4597 // Check if the TBAA Metadata are valid, otherwise we will need to strip them.
4598 if (!MDLoader->isStrippingTBAA()) {
4599 for (auto &I : instructions(F)) {
4600 MDNode *TBAA = I.getMetadata(LLVMContext::MD_tbaa);
4601 if (!TBAA || TBAAVerifyHelper.visitTBAAMetadata(I, TBAA))
4602 continue;
4603 MDLoader->setStripTBAA(true);
4604 stripTBAA(F->getParent());
4605 }
4606 }
4607
4608 // Bring in any functions that this function forward-referenced via
4609 // blockaddresses.
4610 return materializeForwardReferencedFunctions();
4611}
4612
4613Error BitcodeReader::materializeModule() {
4614 if (Error Err = materializeMetadata())
4615 return Err;
4616
4617 // Promise to materialize all forward references.
4618 WillMaterializeAllForwardRefs = true;
4619
4620 // Iterate over the module, deserializing any functions that are still on
4621 // disk.
4622 for (Function &F : *TheModule) {
4623 if (Error Err = materialize(&F))
4624 return Err;
4625 }
4626 // At this point, if there are any function bodies, parse the rest of
4627 // the bits in the module past the last function block we have recorded
4628 // through either lazy scanning or the VST.
4629 if (LastFunctionBlockBit || NextUnreadBit)
4630 if (Error Err = parseModule(LastFunctionBlockBit > NextUnreadBit
4631 ? LastFunctionBlockBit
4632 : NextUnreadBit))
4633 return Err;
4634
4635 // Check that all block address forward references got resolved (as we
4636 // promised above).
4637 if (!BasicBlockFwdRefs.empty())
4638 return error("Never resolved function from blockaddress");
4639
4640 // Upgrade any intrinsic calls that slipped through (should not happen!) and
4641 // delete the old functions to clean up. We can't do this unless the entire
4642 // module is materialized because there could always be another function body
4643 // with calls to the old function.
4644 for (auto &I : UpgradedIntrinsics) {
4645 for (auto *U : I.first->users()) {
4646 if (CallInst *CI = dyn_cast<CallInst>(U))
4647 UpgradeIntrinsicCall(CI, I.second);
4648 }
4649 if (!I.first->use_empty())
4650 I.first->replaceAllUsesWith(I.second);
4651 I.first->eraseFromParent();
4652 }
4653 UpgradedIntrinsics.clear();
4654 // Do the same for remangled intrinsics
4655 for (auto &I : RemangledIntrinsics) {
4656 I.first->replaceAllUsesWith(I.second);
4657 I.first->eraseFromParent();
4658 }
4659 RemangledIntrinsics.clear();
4660
4661 UpgradeDebugInfo(*TheModule);
4662
4663 UpgradeModuleFlags(*TheModule);
4664 return Error::success();
4665}
4666
4667std::vector<StructType *> BitcodeReader::getIdentifiedStructTypes() const {
4668 return IdentifiedStructTypes;
4669}
4670
4671ModuleSummaryIndexBitcodeReader::ModuleSummaryIndexBitcodeReader(
4672 BitstreamCursor Cursor, StringRef Strtab, ModuleSummaryIndex &TheIndex)
4673 : BitcodeReaderBase(std::move(Cursor), Strtab), TheIndex(TheIndex) {}
4674
4675std::pair<GlobalValue::GUID, GlobalValue::GUID>
4676ModuleSummaryIndexBitcodeReader::getGUIDFromValueId(unsigned ValueId) {
4677 auto VGI = ValueIdToCallGraphGUIDMap.find(ValueId);
4678 assert(VGI != ValueIdToCallGraphGUIDMap.end())((VGI != ValueIdToCallGraphGUIDMap.end()) ? static_cast<void
> (0) : __assert_fail ("VGI != ValueIdToCallGraphGUIDMap.end()"
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301769/lib/Bitcode/Reader/BitcodeReader.cpp"
, 4678, __PRETTY_FUNCTION__))
;
4679 return VGI->second;
4680}
4681
4682void ModuleSummaryIndexBitcodeReader::setValueGUID(
4683 uint64_t ValueID, StringRef ValueName, GlobalValue::LinkageTypes Linkage,
4684 StringRef SourceFileName) {
4685 std::string GlobalId =
4686 GlobalValue::getGlobalIdentifier(ValueName, Linkage, SourceFileName);
4687 auto ValueGUID = GlobalValue::getGUID(GlobalId);
4688 auto OriginalNameID = ValueGUID;
4689 if (GlobalValue::isLocalLinkage(Linkage))
4690 OriginalNameID = GlobalValue::getGUID(ValueName);
4691 if (PrintSummaryGUIDs)
4692 dbgs() << "GUID " << ValueGUID << "(" << OriginalNameID << ") is "
4693 << ValueName << "\n";
4694 ValueIdToCallGraphGUIDMap[ValueID] =
4695 std::make_pair(ValueGUID, OriginalNameID);
4696}
4697
4698// Specialized value symbol table parser used when reading module index
4699// blocks where we don't actually create global values. The parsed information
4700// is saved in the bitcode reader for use when later parsing summaries.
4701Error ModuleSummaryIndexBitcodeReader::parseValueSymbolTable(
4702 uint64_t Offset,
4703 DenseMap<unsigned, GlobalValue::LinkageTypes> &ValueIdToLinkageMap) {
4704 // With a strtab the VST is not required to parse the summary.
4705 if (UseStrtab)
4706 return Error::success();
4707
4708 assert(Offset > 0 && "Expected non-zero VST offset")((Offset > 0 && "Expected non-zero VST offset") ? static_cast
<void> (0) : __assert_fail ("Offset > 0 && \"Expected non-zero VST offset\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301769/lib/Bitcode/Reader/BitcodeReader.cpp"
, 4708, __PRETTY_FUNCTION__))
;
4709 uint64_t CurrentBit = jumpToValueSymbolTable(Offset, Stream);
4710
4711 if (Stream.EnterSubBlock(bitc::VALUE_SYMTAB_BLOCK_ID))
4712 return error("Invalid record");
4713
4714 SmallVector<uint64_t, 64> Record;
4715
4716 // Read all the records for this value table.
4717 SmallString<128> ValueName;
4718
4719 while (true) {
4720 BitstreamEntry Entry = Stream.advanceSkippingSubblocks();
4721
4722 switch (Entry.Kind) {
4723 case BitstreamEntry::SubBlock: // Handled for us already.
4724 case BitstreamEntry::Error:
4725 return error("Malformed block");
4726 case BitstreamEntry::EndBlock:
4727 // Done parsing VST, jump back to wherever we came from.
4728 Stream.JumpToBit(CurrentBit);
4729 return Error::success();
4730 case BitstreamEntry::Record:
4731 // The interesting case.
4732 break;
4733 }
4734
4735 // Read a record.
4736 Record.clear();
4737 switch (Stream.readRecord(Entry.ID, Record)) {
4738 default: // Default behavior: ignore (e.g. VST_CODE_BBENTRY records).
4739 break;
4740 case bitc::VST_CODE_ENTRY: { // VST_CODE_ENTRY: [valueid, namechar x N]
4741 if (convertToString(Record, 1, ValueName))
4742 return error("Invalid record");
4743 unsigned ValueID = Record[0];
4744 assert(!SourceFileName.empty())((!SourceFileName.empty()) ? static_cast<void> (0) : __assert_fail
("!SourceFileName.empty()", "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301769/lib/Bitcode/Reader/BitcodeReader.cpp"
, 4744, __PRETTY_FUNCTION__))
;
4745 auto VLI = ValueIdToLinkageMap.find(ValueID);
4746 assert(VLI != ValueIdToLinkageMap.end() &&((VLI != ValueIdToLinkageMap.end() && "No linkage found for VST entry?"
) ? static_cast<void> (0) : __assert_fail ("VLI != ValueIdToLinkageMap.end() && \"No linkage found for VST entry?\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301769/lib/Bitcode/Reader/BitcodeReader.cpp"
, 4747, __PRETTY_FUNCTION__))
4747 "No linkage found for VST entry?")((VLI != ValueIdToLinkageMap.end() && "No linkage found for VST entry?"
) ? static_cast<void> (0) : __assert_fail ("VLI != ValueIdToLinkageMap.end() && \"No linkage found for VST entry?\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301769/lib/Bitcode/Reader/BitcodeReader.cpp"
, 4747, __PRETTY_FUNCTION__))
;
4748 auto Linkage = VLI->second;
4749 setValueGUID(ValueID, ValueName, Linkage, SourceFileName);
4750 ValueName.clear();
4751 break;
4752 }
4753 case bitc::VST_CODE_FNENTRY: {
4754 // VST_CODE_FNENTRY: [valueid, offset, namechar x N]
4755 if (convertToString(Record, 2, ValueName))
4756 return error("Invalid record");
4757 unsigned ValueID = Record[0];
4758 assert(!SourceFileName.empty())((!SourceFileName.empty()) ? static_cast<void> (0) : __assert_fail
("!SourceFileName.empty()", "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301769/lib/Bitcode/Reader/BitcodeReader.cpp"
, 4758, __PRETTY_FUNCTION__))
;
4759 auto VLI = ValueIdToLinkageMap.find(ValueID);
4760 assert(VLI != ValueIdToLinkageMap.end() &&((VLI != ValueIdToLinkageMap.end() && "No linkage found for VST entry?"
) ? static_cast<void> (0) : __assert_fail ("VLI != ValueIdToLinkageMap.end() && \"No linkage found for VST entry?\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301769/lib/Bitcode/Reader/BitcodeReader.cpp"
, 4761, __PRETTY_FUNCTION__))
4761 "No linkage found for VST entry?")((VLI != ValueIdToLinkageMap.end() && "No linkage found for VST entry?"
) ? static_cast<void> (0) : __assert_fail ("VLI != ValueIdToLinkageMap.end() && \"No linkage found for VST entry?\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301769/lib/Bitcode/Reader/BitcodeReader.cpp"
, 4761, __PRETTY_FUNCTION__))
;
4762 auto Linkage = VLI->second;
4763 setValueGUID(ValueID, ValueName, Linkage, SourceFileName);
4764 ValueName.clear();
4765 break;
4766 }
4767 case bitc::VST_CODE_COMBINED_ENTRY: {
4768 // VST_CODE_COMBINED_ENTRY: [valueid, refguid]
4769 unsigned ValueID = Record[0];
4770 GlobalValue::GUID RefGUID = Record[1];
4771 // The "original name", which is the second value of the pair will be
4772 // overriden later by a FS_COMBINED_ORIGINAL_NAME in the combined index.
4773 ValueIdToCallGraphGUIDMap[ValueID] = std::make_pair(RefGUID, RefGUID);
4774 break;
4775 }
4776 }
4777 }
4778}
4779
4780// Parse just the blocks needed for building the index out of the module.
4781// At the end of this routine the module Index is populated with a map
4782// from global value id to GlobalValueSummary objects.
4783Error ModuleSummaryIndexBitcodeReader::parseModule(StringRef ModulePath) {
4784 if (Stream.EnterSubBlock(bitc::MODULE_BLOCK_ID))
4785 return error("Invalid record");
4786
4787 SmallVector<uint64_t, 64> Record;
4788 DenseMap<unsigned, GlobalValue::LinkageTypes> ValueIdToLinkageMap;
4789 unsigned ValueId = 0;
4790
4791 // Read the index for this module.
4792 while (true) {
4793 BitstreamEntry Entry = Stream.advance();
4794
4795 switch (Entry.Kind) {
4796 case BitstreamEntry::Error:
4797 return error("Malformed block");
4798 case BitstreamEntry::EndBlock:
4799 return Error::success();
4800
4801 case BitstreamEntry::SubBlock:
4802 switch (Entry.ID) {
4803 default: // Skip unknown content.
4804 if (Stream.SkipBlock())
4805 return error("Invalid record");
4806 break;
4807 case bitc::BLOCKINFO_BLOCK_ID:
4808 // Need to parse these to get abbrev ids (e.g. for VST)
4809 if (readBlockInfo())
4810 return error("Malformed block");
4811 break;
4812 case bitc::VALUE_SYMTAB_BLOCK_ID:
4813 // Should have been parsed earlier via VSTOffset, unless there
4814 // is no summary section.
4815 assert(((SeenValueSymbolTable && VSTOffset > 0) ||((((SeenValueSymbolTable && VSTOffset > 0) || !SeenGlobalValSummary
) && "Expected early VST parse via VSTOffset record")
? static_cast<void> (0) : __assert_fail ("((SeenValueSymbolTable && VSTOffset > 0) || !SeenGlobalValSummary) && \"Expected early VST parse via VSTOffset record\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301769/lib/Bitcode/Reader/BitcodeReader.cpp"
, 4817, __PRETTY_FUNCTION__))
4816 !SeenGlobalValSummary) &&((((SeenValueSymbolTable && VSTOffset > 0) || !SeenGlobalValSummary
) && "Expected early VST parse via VSTOffset record")
? static_cast<void> (0) : __assert_fail ("((SeenValueSymbolTable && VSTOffset > 0) || !SeenGlobalValSummary) && \"Expected early VST parse via VSTOffset record\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301769/lib/Bitcode/Reader/BitcodeReader.cpp"
, 4817, __PRETTY_FUNCTION__))
4817 "Expected early VST parse via VSTOffset record")((((SeenValueSymbolTable && VSTOffset > 0) || !SeenGlobalValSummary
) && "Expected early VST parse via VSTOffset record")
? static_cast<void> (0) : __assert_fail ("((SeenValueSymbolTable && VSTOffset > 0) || !SeenGlobalValSummary) && \"Expected early VST parse via VSTOffset record\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301769/lib/Bitcode/Reader/BitcodeReader.cpp"
, 4817, __PRETTY_FUNCTION__))
;
4818 if (Stream.SkipBlock())
4819 return error("Invalid record");
4820 break;
4821 case bitc::GLOBALVAL_SUMMARY_BLOCK_ID:
4822 assert(!SeenValueSymbolTable &&((!SeenValueSymbolTable && "Already read VST when parsing summary block?"
) ? static_cast<void> (0) : __assert_fail ("!SeenValueSymbolTable && \"Already read VST when parsing summary block?\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301769/lib/Bitcode/Reader/BitcodeReader.cpp"
, 4823, __PRETTY_FUNCTION__))
4823 "Already read VST when parsing summary block?")((!SeenValueSymbolTable && "Already read VST when parsing summary block?"
) ? static_cast<void> (0) : __assert_fail ("!SeenValueSymbolTable && \"Already read VST when parsing summary block?\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301769/lib/Bitcode/Reader/BitcodeReader.cpp"
, 4823, __PRETTY_FUNCTION__))
;
4824 // We might not have a VST if there were no values in the
4825 // summary. An empty summary block generated when we are
4826 // performing ThinLTO compiles so we don't later invoke
4827 // the regular LTO process on them.
4828 if (VSTOffset > 0) {
4829 if (Error Err = parseValueSymbolTable(VSTOffset, ValueIdToLinkageMap))
4830 return Err;
4831 SeenValueSymbolTable = true;
4832 }
4833 SeenGlobalValSummary = true;
4834 if (Error Err = parseEntireSummary(ModulePath))
4835 return Err;
4836 break;
4837 case bitc::MODULE_STRTAB_BLOCK_ID:
4838 if (Error Err = parseModuleStringTable())
4839 return Err;
4840 break;
4841 }
4842 continue;
4843
4844 case BitstreamEntry::Record: {
4845 Record.clear();
4846 auto BitCode = Stream.readRecord(Entry.ID, Record);
4847 switch (BitCode) {
4848 default:
4849 break; // Default behavior, ignore unknown content.
4850 case bitc::MODULE_CODE_VERSION: {
4851 if (Error Err = parseVersionRecord(Record).takeError())
4852 return Err;
4853 break;
4854 }
4855 /// MODULE_CODE_SOURCE_FILENAME: [namechar x N]
4856 case bitc::MODULE_CODE_SOURCE_FILENAME: {
4857 SmallString<128> ValueName;
4858 if (convertToString(Record, 0, ValueName))
4859 return error("Invalid record");
4860 SourceFileName = ValueName.c_str();
4861 break;
4862 }
4863 /// MODULE_CODE_HASH: [5*i32]
4864 case bitc::MODULE_CODE_HASH: {
4865 if (Record.size() != 5)
4866 return error("Invalid hash length " + Twine(Record.size()).str());
4867 if (TheIndex.modulePaths().empty())
4868 // We always seed the index with the module.
4869 TheIndex.addModulePath(ModulePath, 0);
4870 if (TheIndex.modulePaths().size() != 1)
4871 return error("Don't expect multiple modules defined?");
4872 auto &Hash = TheIndex.modulePaths().begin()->second.second;
4873 int Pos = 0;
4874 for (auto &Val : Record) {
4875 assert(!(Val >> 32) && "Unexpected high bits set")((!(Val >> 32) && "Unexpected high bits set") ?
static_cast<void> (0) : __assert_fail ("!(Val >> 32) && \"Unexpected high bits set\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301769/lib/Bitcode/Reader/BitcodeReader.cpp"
, 4875, __PRETTY_FUNCTION__))
;
4876 Hash[Pos++] = Val;
4877 }
4878 break;
4879 }
4880 /// MODULE_CODE_VSTOFFSET: [offset]
4881 case bitc::MODULE_CODE_VSTOFFSET:
4882 if (Record.size() < 1)
4883 return error("Invalid record");
4884 // Note that we subtract 1 here because the offset is relative to one
4885 // word before the start of the identification or module block, which
4886 // was historically always the start of the regular bitcode header.
4887 VSTOffset = Record[0] - 1;
4888 break;
4889 // v1 GLOBALVAR: [pointer type, isconst, initid, linkage, ...]
4890 // v1 FUNCTION: [type, callingconv, isproto, linkage, ...]
4891 // v1 ALIAS: [alias type, addrspace, aliasee val#, linkage, ...]
4892 // v2: [strtab offset, strtab size, v1]
4893 case bitc::MODULE_CODE_GLOBALVAR:
4894 case bitc::MODULE_CODE_FUNCTION:
4895 case bitc::MODULE_CODE_ALIAS: {
4896 StringRef Name;
4897 ArrayRef<uint64_t> GVRecord;
4898 std::tie(Name, GVRecord) = readNameFromStrtab(Record);
4899 if (GVRecord.size() <= 3)
4900 return error("Invalid record");
4901 uint64_t RawLinkage = GVRecord[3];
4902 GlobalValue::LinkageTypes Linkage = getDecodedLinkage(RawLinkage);
4903 if (!UseStrtab) {
4904 ValueIdToLinkageMap[ValueId++] = Linkage;
4905 break;
4906 }
4907
4908 setValueGUID(ValueId++, Name, Linkage, SourceFileName);
4909 break;
4910 }
4911 }
4912 }
4913 continue;
4914 }
4915 }
4916}
4917
4918std::vector<ValueInfo>
4919ModuleSummaryIndexBitcodeReader::makeRefList(ArrayRef<uint64_t> Record) {
4920 std::vector<ValueInfo> Ret;
4921 Ret.reserve(Record.size());
4922 for (uint64_t RefValueId : Record)
4923 Ret.push_back(getGUIDFromValueId(RefValueId).first);
4924 return Ret;
4925}
4926
4927std::vector<FunctionSummary::EdgeTy> ModuleSummaryIndexBitcodeReader::makeCallList(
4928 ArrayRef<uint64_t> Record, bool IsOldProfileFormat, bool HasProfile) {
4929 std::vector<FunctionSummary::EdgeTy> Ret;
4930 Ret.reserve(Record.size());
4931 for (unsigned I = 0, E = Record.size(); I != E; ++I) {
4932 CalleeInfo::HotnessType Hotness = CalleeInfo::HotnessType::Unknown;
4933 GlobalValue::GUID CalleeGUID = getGUIDFromValueId(Record[I]).first;
4934 if (IsOldProfileFormat) {
4935 I += 1; // Skip old callsitecount field
4936 if (HasProfile)
4937 I += 1; // Skip old profilecount field
4938 } else if (HasProfile)
4939 Hotness = static_cast<CalleeInfo::HotnessType>(Record[++I]);
4940 Ret.push_back(FunctionSummary::EdgeTy{CalleeGUID, CalleeInfo{Hotness}});
4941 }
4942 return Ret;
4943}
4944
4945// Eagerly parse the entire summary block. This populates the GlobalValueSummary
4946// objects in the index.
4947Error ModuleSummaryIndexBitcodeReader::parseEntireSummary(
4948 StringRef ModulePath) {
4949 if (Stream.EnterSubBlock(bitc::GLOBALVAL_SUMMARY_BLOCK_ID))
4950 return error("Invalid record");
4951 SmallVector<uint64_t, 64> Record;
4952
4953 // Parse version
4954 {
4955 BitstreamEntry Entry = Stream.advanceSkippingSubblocks();
4956 if (Entry.Kind != BitstreamEntry::Record)
4957 return error("Invalid Summary Block: record for version expected");
4958 if (Stream.readRecord(Entry.ID, Record) != bitc::FS_VERSION)
4959 return error("Invalid Summary Block: version expected");
4960 }
4961 const uint64_t Version = Record[0];
4962 const bool IsOldProfileFormat = Version == 1;
4963 if (Version < 1 || Version > 3)
4964 return error("Invalid summary version " + Twine(Version) +
4965 ", 1, 2 or 3 expected");
4966 Record.clear();
4967
4968 // Keep around the last seen summary to be used when we see an optional
4969 // "OriginalName" attachement.
4970 GlobalValueSummary *LastSeenSummary = nullptr;
4971 GlobalValue::GUID LastSeenGUID = 0;
4972
4973 // We can expect to see any number of type ID information records before
4974 // each function summary records; these variables store the information
4975 // collected so far so that it can be used to create the summary object.
4976 std::vector<GlobalValue::GUID> PendingTypeTests;
4977 std::vector<FunctionSummary::VFuncId> PendingTypeTestAssumeVCalls,
4978 PendingTypeCheckedLoadVCalls;
4979 std::vector<FunctionSummary::ConstVCall> PendingTypeTestAssumeConstVCalls,
4980 PendingTypeCheckedLoadConstVCalls;
4981
4982 while (true) {
4983 BitstreamEntry Entry = Stream.advanceSkippingSubblocks();
4984
4985 switch (Entry.Kind) {
4986 case BitstreamEntry::SubBlock: // Handled for us already.
4987 case BitstreamEntry::Error:
4988 return error("Malformed block");
4989 case BitstreamEntry::EndBlock:
4990 return Error::success();
4991 case BitstreamEntry::Record:
4992 // The interesting case.
4993 break;
4994 }
4995
4996 // Read a record. The record format depends on whether this
4997 // is a per-module index or a combined index file. In the per-module
4998 // case the records contain the associated value's ID for correlation
4999 // with VST entries. In the combined index the correlation is done
5000 // via the bitcode offset of the summary records (which were saved
5001 // in the combined index VST entries). The records also contain
5002 // information used for ThinLTO renaming and importing.
5003 Record.clear();
5004 auto BitCode = Stream.readRecord(Entry.ID, Record);
5005 switch (BitCode) {
5006 default: // Default behavior: ignore.
5007 break;
5008 case bitc::FS_VALUE_GUID: { // [valueid, refguid]
5009 uint64_t ValueID = Record[0];
5010 GlobalValue::GUID RefGUID = Record[1];
5011 ValueIdToCallGraphGUIDMap[ValueID] = std::make_pair(RefGUID, RefGUID);
5012 break;
5013 }
5014 // FS_PERMODULE: [valueid, flags, instcount, numrefs, numrefs x valueid,
5015 // n x (valueid)]
5016 // FS_PERMODULE_PROFILE: [valueid, flags, instcount, numrefs,
5017 // numrefs x valueid,
5018 // n x (valueid, hotness)]
5019 case bitc::FS_PERMODULE:
5020 case bitc::FS_PERMODULE_PROFILE: {
5021 unsigned ValueID = Record[0];
5022 uint64_t RawFlags = Record[1];
5023 unsigned InstCount = Record[2];
5024 unsigned NumRefs = Record[3];
5025 auto Flags = getDecodedGVSummaryFlags(RawFlags, Version);
5026 // The module path string ref set in the summary must be owned by the
5027 // index's module string table. Since we don't have a module path
5028 // string table section in the per-module index, we create a single
5029 // module path string table entry with an empty (0) ID to take
5030 // ownership.
5031 static int RefListStartIndex = 4;
5032 int CallGraphEdgeStartIndex = RefListStartIndex + NumRefs;
5033 assert(Record.size() >= RefListStartIndex + NumRefs &&((Record.size() >= RefListStartIndex + NumRefs && "Record size inconsistent with number of references"
) ? static_cast<void> (0) : __assert_fail ("Record.size() >= RefListStartIndex + NumRefs && \"Record size inconsistent with number of references\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301769/lib/Bitcode/Reader/BitcodeReader.cpp"
, 5034, __PRETTY_FUNCTION__))
5034 "Record size inconsistent with number of references")((Record.size() >= RefListStartIndex + NumRefs && "Record size inconsistent with number of references"
) ? static_cast<void> (0) : __assert_fail ("Record.size() >= RefListStartIndex + NumRefs && \"Record size inconsistent with number of references\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301769/lib/Bitcode/Reader/BitcodeReader.cpp"
, 5034, __PRETTY_FUNCTION__))
;
5035 std::vector<ValueInfo> Refs = makeRefList(
5036 ArrayRef<uint64_t>(Record).slice(RefListStartIndex, NumRefs));
5037 bool HasProfile = (BitCode == bitc::FS_PERMODULE_PROFILE);
5038 std::vector<FunctionSummary::EdgeTy> Calls = makeCallList(
5039 ArrayRef<uint64_t>(Record).slice(CallGraphEdgeStartIndex),
5040 IsOldProfileFormat, HasProfile);
5041 auto FS = llvm::make_unique<FunctionSummary>(
5042 Flags, InstCount, std::move(Refs), std::move(Calls),
5043 std::move(PendingTypeTests), std::move(PendingTypeTestAssumeVCalls),
5044 std::move(PendingTypeCheckedLoadVCalls),
5045 std::move(PendingTypeTestAssumeConstVCalls),
5046 std::move(PendingTypeCheckedLoadConstVCalls));
5047 PendingTypeTests.clear();
5048 PendingTypeTestAssumeVCalls.clear();
5049 PendingTypeCheckedLoadVCalls.clear();
5050 PendingTypeTestAssumeConstVCalls.clear();
5051 PendingTypeCheckedLoadConstVCalls.clear();
5052 auto GUID = getGUIDFromValueId(ValueID);
5053 FS->setModulePath(TheIndex.addModulePath(ModulePath, 0)->first());
5054 FS->setOriginalName(GUID.second);
5055 TheIndex.addGlobalValueSummary(GUID.first, std::move(FS));
5056 break;
5057 }
5058 // FS_ALIAS: [valueid, flags, valueid]
5059 // Aliases must be emitted (and parsed) after all FS_PERMODULE entries, as
5060 // they expect all aliasee summaries to be available.
5061 case bitc::FS_ALIAS: {
5062 unsigned ValueID = Record[0];
5063 uint64_t RawFlags = Record[1];
5064 unsigned AliaseeID = Record[2];
5065 auto Flags = getDecodedGVSummaryFlags(RawFlags, Version);
5066 auto AS =
5067 llvm::make_unique<AliasSummary>(Flags, std::vector<ValueInfo>{});
5068 // The module path string ref set in the summary must be owned by the
5069 // index's module string table. Since we don't have a module path
5070 // string table section in the per-module index, we create a single
5071 // module path string table entry with an empty (0) ID to take
5072 // ownership.
5073 AS->setModulePath(TheIndex.addModulePath(ModulePath, 0)->first());
5074
5075 GlobalValue::GUID AliaseeGUID = getGUIDFromValueId(AliaseeID).first;
5076 auto *AliaseeSummary = TheIndex.getGlobalValueSummary(AliaseeGUID);
5077 if (!AliaseeSummary)
5078 return error("Alias expects aliasee summary to be parsed");
5079 AS->setAliasee(AliaseeSummary);
5080
5081 auto GUID = getGUIDFromValueId(ValueID);
5082 AS->setOriginalName(GUID.second);
5083 TheIndex.addGlobalValueSummary(GUID.first, std::move(AS));
5084 break;
5085 }
5086 // FS_PERMODULE_GLOBALVAR_INIT_REFS: [valueid, flags, n x valueid]
5087 case bitc::FS_PERMODULE_GLOBALVAR_INIT_REFS: {
5088 unsigned ValueID = Record[0];
5089 uint64_t RawFlags = Record[1];
5090 auto Flags = getDecodedGVSummaryFlags(RawFlags, Version);
5091 std::vector<ValueInfo> Refs =
5092 makeRefList(ArrayRef<uint64_t>(Record).slice(2));
5093 auto FS = llvm::make_unique<GlobalVarSummary>(Flags, std::move(Refs));
5094 FS->setModulePath(TheIndex.addModulePath(ModulePath, 0)->first());
5095 auto GUID = getGUIDFromValueId(ValueID);
5096 FS->setOriginalName(GUID.second);
5097 TheIndex.addGlobalValueSummary(GUID.first, std::move(FS));
5098 break;
5099 }
5100 // FS_COMBINED: [valueid, modid, flags, instcount, numrefs,
5101 // numrefs x valueid, n x (valueid)]
5102 // FS_COMBINED_PROFILE: [valueid, modid, flags, instcount, numrefs,
5103 // numrefs x valueid, n x (valueid, hotness)]
5104 case bitc::FS_COMBINED:
5105 case bitc::FS_COMBINED_PROFILE: {
5106 unsigned ValueID = Record[0];
5107 uint64_t ModuleId = Record[1];
5108 uint64_t RawFlags = Record[2];
5109 unsigned InstCount = Record[3];
5110 unsigned NumRefs = Record[4];
5111 auto Flags = getDecodedGVSummaryFlags(RawFlags, Version);
5112 static int RefListStartIndex = 5;
5113 int CallGraphEdgeStartIndex = RefListStartIndex + NumRefs;
5114 assert(Record.size() >= RefListStartIndex + NumRefs &&((Record.size() >= RefListStartIndex + NumRefs && "Record size inconsistent with number of references"
) ? static_cast<void> (0) : __assert_fail ("Record.size() >= RefListStartIndex + NumRefs && \"Record size inconsistent with number of references\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301769/lib/Bitcode/Reader/BitcodeReader.cpp"
, 5115, __PRETTY_FUNCTION__))
5115 "Record size inconsistent with number of references")((Record.size() >= RefListStartIndex + NumRefs && "Record size inconsistent with number of references"
) ? static_cast<void> (0) : __assert_fail ("Record.size() >= RefListStartIndex + NumRefs && \"Record size inconsistent with number of references\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301769/lib/Bitcode/Reader/BitcodeReader.cpp"
, 5115, __PRETTY_FUNCTION__))
;
5116 std::vector<ValueInfo> Refs = makeRefList(
5117 ArrayRef<uint64_t>(Record).slice(RefListStartIndex, NumRefs));
5118 bool HasProfile = (BitCode == bitc::FS_COMBINED_PROFILE);
5119 std::vector<FunctionSummary::EdgeTy> Edges = makeCallList(
5120 ArrayRef<uint64_t>(Record).slice(CallGraphEdgeStartIndex),
5121 IsOldProfileFormat, HasProfile);
5122 GlobalValue::GUID GUID = getGUIDFromValueId(ValueID).first;
5123 auto FS = llvm::make_unique<FunctionSummary>(
5124 Flags, InstCount, std::move(Refs), std::move(Edges),
5125 std::move(PendingTypeTests), std::move(PendingTypeTestAssumeVCalls),
5126 std::move(PendingTypeCheckedLoadVCalls),
5127 std::move(PendingTypeTestAssumeConstVCalls),
5128 std::move(PendingTypeCheckedLoadConstVCalls));
5129 PendingTypeTests.clear();
5130 PendingTypeTestAssumeVCalls.clear();
5131 PendingTypeCheckedLoadVCalls.clear();
5132 PendingTypeTestAssumeConstVCalls.clear();
5133 PendingTypeCheckedLoadConstVCalls.clear();
5134 LastSeenSummary = FS.get();
5135 LastSeenGUID = GUID;
5136 FS->setModulePath(ModuleIdMap[ModuleId]);
5137 TheIndex.addGlobalValueSummary(GUID, std::move(FS));
5138 break;
5139 }
5140 // FS_COMBINED_ALIAS: [valueid, modid, flags, valueid]
5141 // Aliases must be emitted (and parsed) after all FS_COMBINED entries, as
5142 // they expect all aliasee summaries to be available.
5143 case bitc::FS_COMBINED_ALIAS: {
5144 unsigned ValueID = Record[0];
5145 uint64_t ModuleId = Record[1];
5146 uint64_t RawFlags = Record[2];
5147 unsigned AliaseeValueId = Record[3];
5148 auto Flags = getDecodedGVSummaryFlags(RawFlags, Version);
5149 auto AS = llvm::make_unique<AliasSummary>(Flags, std::vector<ValueInfo>{});
5150 LastSeenSummary = AS.get();
5151 AS->setModulePath(ModuleIdMap[ModuleId]);
5152
5153 auto AliaseeGUID = getGUIDFromValueId(AliaseeValueId).first;
5154 auto AliaseeInModule =
5155 TheIndex.findSummaryInModule(AliaseeGUID, AS->modulePath());
5156 if (!AliaseeInModule)
5157 return error("Alias expects aliasee summary to be parsed");
5158 AS->setAliasee(AliaseeInModule);
5159
5160 GlobalValue::GUID GUID = getGUIDFromValueId(ValueID).first;
5161 LastSeenGUID = GUID;
5162 TheIndex.addGlobalValueSummary(GUID, std::move(AS));
5163 break;
5164 }
5165 // FS_COMBINED_GLOBALVAR_INIT_REFS: [valueid, modid, flags, n x valueid]
5166 case bitc::FS_COMBINED_GLOBALVAR_INIT_REFS: {
5167 unsigned ValueID = Record[0];
5168 uint64_t ModuleId = Record[1];
5169 uint64_t RawFlags = Record[2];
5170 auto Flags = getDecodedGVSummaryFlags(RawFlags, Version);
5171 std::vector<ValueInfo> Refs =
5172 makeRefList(ArrayRef<uint64_t>(Record).slice(3));
5173 auto FS = llvm::make_unique<GlobalVarSummary>(Flags, std::move(Refs));
5174 LastSeenSummary = FS.get();
5175 FS->setModulePath(ModuleIdMap[ModuleId]);
5176 GlobalValue::GUID GUID = getGUIDFromValueId(ValueID).first;
5177 LastSeenGUID = GUID;
5178 TheIndex.addGlobalValueSummary(GUID, std::move(FS));
5179 break;
5180 }
5181 // FS_COMBINED_ORIGINAL_NAME: [original_name]
5182 case bitc::FS_COMBINED_ORIGINAL_NAME: {
5183 uint64_t OriginalName = Record[0];
5184 if (!LastSeenSummary)
5185 return error("Name attachment that does not follow a combined record");
5186 LastSeenSummary->setOriginalName(OriginalName);
5187 TheIndex.addOriginalName(LastSeenGUID, OriginalName);
5188 // Reset the LastSeenSummary
5189 LastSeenSummary = nullptr;
5190 LastSeenGUID = 0;
5191 break;
5192 }
5193 case bitc::FS_TYPE_TESTS: {
5194 assert(PendingTypeTests.empty())((PendingTypeTests.empty()) ? static_cast<void> (0) : __assert_fail
("PendingTypeTests.empty()", "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301769/lib/Bitcode/Reader/BitcodeReader.cpp"
, 5194, __PRETTY_FUNCTION__))
;
5195 PendingTypeTests.insert(PendingTypeTests.end(), Record.begin(),
5196 Record.end());
5197 break;
5198 }
5199 case bitc::FS_TYPE_TEST_ASSUME_VCALLS: {
5200 assert(PendingTypeTestAssumeVCalls.empty())((PendingTypeTestAssumeVCalls.empty()) ? static_cast<void>
(0) : __assert_fail ("PendingTypeTestAssumeVCalls.empty()", "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301769/lib/Bitcode/Reader/BitcodeReader.cpp"
, 5200, __PRETTY_FUNCTION__))
;
5201 for (unsigned I = 0; I != Record.size(); I += 2)
5202 PendingTypeTestAssumeVCalls.push_back({Record[I], Record[I+1]});
5203 break;
5204 }
5205 case bitc::FS_TYPE_CHECKED_LOAD_VCALLS: {
5206 assert(PendingTypeCheckedLoadVCalls.empty())((PendingTypeCheckedLoadVCalls.empty()) ? static_cast<void
> (0) : __assert_fail ("PendingTypeCheckedLoadVCalls.empty()"
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301769/lib/Bitcode/Reader/BitcodeReader.cpp"
, 5206, __PRETTY_FUNCTION__))
;
5207 for (unsigned I = 0; I != Record.size(); I += 2)
5208 PendingTypeCheckedLoadVCalls.push_back({Record[I], Record[I+1]});
5209 break;
5210 }
5211 case bitc::FS_TYPE_TEST_ASSUME_CONST_VCALL: {
5212 PendingTypeTestAssumeConstVCalls.push_back(
5213 {{Record[0], Record[1]}, {Record.begin() + 2, Record.end()}});
5214 break;
5215 }
5216 case bitc::FS_TYPE_CHECKED_LOAD_CONST_VCALL: {
5217 PendingTypeCheckedLoadConstVCalls.push_back(
5218 {{Record[0], Record[1]}, {Record.begin() + 2, Record.end()}});
5219 break;
5220 }
5221 }
5222 }
5223 llvm_unreachable("Exit infinite loop")::llvm::llvm_unreachable_internal("Exit infinite loop", "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301769/lib/Bitcode/Reader/BitcodeReader.cpp"
, 5223)
;
5224}
5225
5226// Parse the module string table block into the Index.
5227// This populates the ModulePathStringTable map in the index.
5228Error ModuleSummaryIndexBitcodeReader::parseModuleStringTable() {
5229 if (Stream.EnterSubBlock(bitc::MODULE_STRTAB_BLOCK_ID))
5230 return error("Invalid record");
5231
5232 SmallVector<uint64_t, 64> Record;
5233
5234 SmallString<128> ModulePath;
5235 ModulePathStringTableTy::iterator LastSeenModulePath;
5236
5237 while (true) {
5238 BitstreamEntry Entry = Stream.advanceSkippingSubblocks();
5239
5240 switch (Entry.Kind) {
5241 case BitstreamEntry::SubBlock: // Handled for us already.
5242 case BitstreamEntry::Error:
5243 return error("Malformed block");
5244 case BitstreamEntry::EndBlock:
5245 return Error::success();
5246 case BitstreamEntry::Record:
5247 // The interesting case.
5248 break;
5249 }
5250
5251 Record.clear();
5252 switch (Stream.readRecord(Entry.ID, Record)) {
5253 default: // Default behavior: ignore.
5254 break;
5255 case bitc::MST_CODE_ENTRY: {
5256 // MST_ENTRY: [modid, namechar x N]
5257 uint64_t ModuleId = Record[0];
5258
5259 if (convertToString(Record, 1, ModulePath))
5260 return error("Invalid record");
5261
5262 LastSeenModulePath = TheIndex.addModulePath(ModulePath, ModuleId);
5263 ModuleIdMap[ModuleId] = LastSeenModulePath->first();
5264
5265 ModulePath.clear();
5266 break;
5267 }
5268 /// MST_CODE_HASH: [5*i32]
5269 case bitc::MST_CODE_HASH: {
5270 if (Record.size() != 5)
5271 return error("Invalid hash length " + Twine(Record.size()).str());
5272 if (LastSeenModulePath == TheIndex.modulePaths().end())
5273 return error("Invalid hash that does not follow a module path");
5274 int Pos = 0;
5275 for (auto &Val : Record) {
5276 assert(!(Val >> 32) && "Unexpected high bits set")((!(Val >> 32) && "Unexpected high bits set") ?
static_cast<void> (0) : __assert_fail ("!(Val >> 32) && \"Unexpected high bits set\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301769/lib/Bitcode/Reader/BitcodeReader.cpp"
, 5276, __PRETTY_FUNCTION__))
;
5277 LastSeenModulePath->second.second[Pos++] = Val;
5278 }
5279 // Reset LastSeenModulePath to avoid overriding the hash unexpectedly.
5280 LastSeenModulePath = TheIndex.modulePaths().end();
5281 break;
5282 }
5283 }
5284 }
5285 llvm_unreachable("Exit infinite loop")::llvm::llvm_unreachable_internal("Exit infinite loop", "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301769/lib/Bitcode/Reader/BitcodeReader.cpp"
, 5285)
;
5286}
5287
5288namespace {
5289
5290// FIXME: This class is only here to support the transition to llvm::Error. It
5291// will be removed once this transition is complete. Clients should prefer to
5292// deal with the Error value directly, rather than converting to error_code.
5293class BitcodeErrorCategoryType : public std::error_category {
5294 const char *name() const noexcept override {
5295 return "llvm.bitcode";
5296 }
5297 std::string message(int IE) const override {
5298 BitcodeError E = static_cast<BitcodeError>(IE);
5299 switch (E) {
5300 case BitcodeError::CorruptedBitcode:
5301 return "Corrupted bitcode";
5302 }
5303 llvm_unreachable("Unknown error type!")::llvm::llvm_unreachable_internal("Unknown error type!", "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn301769/lib/Bitcode/Reader/BitcodeReader.cpp"
, 5303)
;
5304 }
5305};
5306
5307} // end anonymous namespace
5308
5309static ManagedStatic<BitcodeErrorCategoryType> ErrorCategory;
5310
5311const std::error_category &llvm::BitcodeErrorCategory() {
5312 return *ErrorCategory;
5313}
5314
5315static Expected<StringRef> readStrtab(BitstreamCursor &Stream) {
5316 if (Stream.EnterSubBlock(bitc::STRTAB_BLOCK_ID))
5317 return error("Invalid record");
5318
5319 StringRef Strtab;
5320 while (1) {
5321 BitstreamEntry Entry = Stream.advance();
5322 switch (Entry.Kind) {
5323 case BitstreamEntry::EndBlock:
5324 return Strtab;
5325
5326 case BitstreamEntry::Error:
5327 return error("Malformed block");
5328
5329 case BitstreamEntry::SubBlock:
5330 if (Stream.SkipBlock())
5331 return error("Malformed block");
5332 break;
5333
5334 case BitstreamEntry::Record:
5335 StringRef Blob;
5336 SmallVector<uint64_t, 1> Record;
5337 if (Stream.readRecord(Entry.ID, Record, &Blob) == bitc::STRTAB_BLOB)
5338 Strtab = Blob;
5339 break;
5340 }
5341 }
5342}
5343
5344//===----------------------------------------------------------------------===//
5345// External interface
5346//===----------------------------------------------------------------------===//
5347
5348Expected<std::vector<BitcodeModule>>
5349llvm::getBitcodeModuleList(MemoryBufferRef Buffer) {
5350 Expected<BitstreamCursor> StreamOrErr = initStream(Buffer);
5351 if (!StreamOrErr)
5352 return StreamOrErr.takeError();
5353 BitstreamCursor &Stream = *StreamOrErr;
5354
5355 std::vector<BitcodeModule> Modules;
5356 while (true) {
5357 uint64_t BCBegin = Stream.getCurrentByteNo();
5358
5359 // We may be consuming bitcode from a client that leaves garbage at the end
5360 // of the bitcode stream (e.g. Apple's ar tool). If we are close enough to
5361 // the end that there cannot possibly be another module, stop looking.
5362 if (BCBegin + 8 >= Stream.getBitcodeBytes().size())
5363 return Modules;
5364
5365 BitstreamEntry Entry = Stream.advance();
5366 switch (Entry.Kind) {
5367 case BitstreamEntry::EndBlock:
5368 case BitstreamEntry::Error:
5369 return error("Malformed block");
5370
5371 case BitstreamEntry::SubBlock: {
5372 uint64_t IdentificationBit = -1ull;
5373 if (Entry.ID == bitc::IDENTIFICATION_BLOCK_ID) {
5374 IdentificationBit = Stream.GetCurrentBitNo() - BCBegin * 8;
5375 if (Stream.SkipBlock())
5376 return error("Malformed block");
5377
5378 Entry = Stream.advance();
5379 if (Entry.Kind != BitstreamEntry::SubBlock ||
5380 Entry.ID != bitc::MODULE_BLOCK_ID)
5381 return error("Malformed block");
5382 }
5383
5384 if (Entry.ID == bitc::MODULE_BLOCK_ID) {
5385 uint64_t ModuleBit = Stream.GetCurrentBitNo() - BCBegin * 8;
5386 if (Stream.SkipBlock())
5387 return error("Malformed block");
5388
5389 Modules.push_back({Stream.getBitcodeBytes().slice(
5390 BCBegin, Stream.getCurrentByteNo() - BCBegin),
5391 Buffer.getBufferIdentifier(), IdentificationBit,
5392 ModuleBit});
5393 continue;
5394 }
5395
5396 if (Entry.ID == bitc::STRTAB_BLOCK_ID) {
5397 Expected<StringRef> Strtab = readStrtab(Stream);
5398 if (!Strtab)
5399 return Strtab.takeError();
5400 // This string table is used by every preceding bitcode module that does
5401 // not have its own string table. A bitcode file may have multiple
5402 // string tables if it was created by binary concatenation, for example
5403 // with "llvm-cat -b".
5404 for (auto I = Modules.rbegin(), E = Modules.rend(); I != E; ++I) {
5405 if (!I->Strtab.empty())
5406 break;
5407 I->Strtab = *Strtab;
5408 }
5409 continue;
5410 }
5411
5412 if (Stream.SkipBlock())
5413 return error("Malformed block");
5414 continue;
5415 }
5416 case BitstreamEntry::Record:
5417 Stream.skipRecord(Entry.ID);
5418 continue;
5419 }
5420 }
5421}
5422
5423/// \brief Get a lazy one-at-time loading module from bitcode.
5424///
5425/// This isn't always used in a lazy context. In particular, it's also used by
5426/// \a parseModule(). If this is truly lazy, then we need to eagerly pull
5427/// in forward-referenced functions from block address references.
5428///
5429/// \param[in] MaterializeAll Set to \c true if we should materialize
5430/// everything.
5431Expected<std::unique_ptr<Module>>
5432BitcodeModule::getModuleImpl(LLVMContext &Context, bool MaterializeAll,
5433 bool ShouldLazyLoadMetadata, bool IsImporting) {
5434 BitstreamCursor Stream(Buffer);
5435
5436 std::string ProducerIdentification;
5437 if (IdentificationBit != -1ull) {
5438 Stream.JumpToBit(IdentificationBit);
5439 Expected<std::string> ProducerIdentificationOrErr =
5440 readIdentificationBlock(Stream);
5441 if (!ProducerIdentificationOrErr)
5442 return ProducerIdentificationOrErr.takeError();
5443
5444 ProducerIdentification = *ProducerIdentificationOrErr;
5445 }
5446
5447 Stream.JumpToBit(ModuleBit);
5448 auto *R = new BitcodeReader(std::move(Stream), Strtab, ProducerIdentification,
5449 Context);
5450
5451 std::unique_ptr<Module> M =
5452 llvm::make_unique<Module>(ModuleIdentifier, Context);
5453 M->setMaterializer(R);
5454
5455 // Delay parsing Metadata if ShouldLazyLoadMetadata is true.
5456 if (Error Err =
5457 R->parseBitcodeInto(M.get(), ShouldLazyLoadMetadata, IsImporting))
5458 return std::move(Err);
5459
5460 if (MaterializeAll) {
5461 // Read in the entire module, and destroy the BitcodeReader.
5462 if (Error Err = M->materializeAll())
5463 return std::move(Err);
5464 } else {
5465 // Resolve forward references from blockaddresses.
5466 if (Error Err = R->materializeForwardReferencedFunctions())
5467 return std::move(Err);
5468 }
5469 return std::move(M);
5470}
5471
5472Expected<std::unique_ptr<Module>>
5473BitcodeModule::getLazyModule(LLVMContext &Context, bool ShouldLazyLoadMetadata,
5474 bool IsImporting) {
5475 return getModuleImpl(Context, false, ShouldLazyLoadMetadata, IsImporting);
5476}
5477
5478// Parse the specified bitcode buffer, returning the function info index.
5479Expected<std::unique_ptr<ModuleSummaryIndex>> BitcodeModule::getSummary() {
5480 BitstreamCursor Stream(Buffer);
5481 Stream.JumpToBit(ModuleBit);
5482
5483 auto Index = llvm::make_unique<ModuleSummaryIndex>();
5484 ModuleSummaryIndexBitcodeReader R(std::move(Stream), Strtab, *Index);
5485
5486 if (Error Err = R.parseModule(ModuleIdentifier))
5487 return std::move(Err);
5488
5489 return std::move(Index);
5490}
5491
5492// Check if the given bitcode buffer contains a global value summary block.
5493Expected<bool> BitcodeModule::hasSummary() {
5494 BitstreamCursor Stream(Buffer);
5495 Stream.JumpToBit(ModuleBit);
5496
5497 if (Stream.EnterSubBlock(bitc::MODULE_BLOCK_ID))
5498 return error("Invalid record");
5499
5500 while (true) {
5501 BitstreamEntry Entry = Stream.advance();
5502
5503 switch (Entry.Kind) {
5504 case BitstreamEntry::Error:
5505 return error("Malformed block");
5506 case BitstreamEntry::EndBlock:
5507 return false;
5508
5509 case BitstreamEntry::SubBlock:
5510 if (Entry.ID == bitc::GLOBALVAL_SUMMARY_BLOCK_ID)
5511 return true;
5512
5513 // Ignore other sub-blocks.
5514 if (Stream.SkipBlock())
5515 return error("Malformed block");
5516 continue;
5517
5518 case BitstreamEntry::Record:
5519 Stream.skipRecord(Entry.ID);
5520 continue;
5521 }
5522 }
5523}
5524
5525static Expected<BitcodeModule> getSingleModule(MemoryBufferRef Buffer) {
5526 Expected<std::vector<BitcodeModule>> MsOrErr = getBitcodeModuleList(Buffer);
5527 if (!MsOrErr)
5528 return MsOrErr.takeError();
5529
5530 if (MsOrErr->size() != 1)
5531 return error("Expected a single module");
5532
5533 return (*MsOrErr)[0];
5534}
5535
5536Expected<std::unique_ptr<Module>>
5537llvm::getLazyBitcodeModule(MemoryBufferRef Buffer, LLVMContext &Context,
5538 bool ShouldLazyLoadMetadata, bool IsImporting) {
5539 Expected<BitcodeModule> BM = getSingleModule(Buffer);
5540 if (!BM)
5541 return BM.takeError();
5542
5543 return BM->getLazyModule(Context, ShouldLazyLoadMetadata, IsImporting);
5544}
5545
5546Expected<std::unique_ptr<Module>> llvm::getOwningLazyBitcodeModule(
5547 std::unique_ptr<MemoryBuffer> &&Buffer, LLVMContext &Context,
5548 bool ShouldLazyLoadMetadata, bool IsImporting) {
5549 auto MOrErr = getLazyBitcodeModule(*Buffer, Context, ShouldLazyLoadMetadata,
5550 IsImporting);
5551 if (MOrErr)
5552 (*MOrErr)->setOwnedMemoryBuffer(std::move(Buffer));
5553 return MOrErr;
5554}
5555
5556Expected<std::unique_ptr<Module>>
5557BitcodeModule::parseModule(LLVMContext &Context) {
5558 return getModuleImpl(Context, true, false, false);
5559 // TODO: Restore the use-lists to the in-memory state when the bitcode was
5560 // written. We must defer until the Module has been fully materialized.
5561}
5562
5563Expected<std::unique_ptr<Module>> llvm::parseBitcodeFile(MemoryBufferRef Buffer,
5564 LLVMContext &Context) {
5565 Expected<BitcodeModule> BM = getSingleModule(Buffer);
5566 if (!BM)
5567 return BM.takeError();
5568
5569 return BM->parseModule(Context);
5570}
5571
5572Expected<std::string> llvm::getBitcodeTargetTriple(MemoryBufferRef Buffer) {
5573 Expected<BitstreamCursor> StreamOrErr = initStream(Buffer);
5574 if (!StreamOrErr)
5575 return StreamOrErr.takeError();
5576
5577 return readTriple(*StreamOrErr);
5578}
5579
5580Expected<bool> llvm::isBitcodeContainingObjCCategory(MemoryBufferRef Buffer) {
5581 Expected<BitstreamCursor> StreamOrErr = initStream(Buffer);
5582 if (!StreamOrErr)
5583 return StreamOrErr.takeError();
5584
5585 return hasObjCCategory(*StreamOrErr);
5586}
5587
5588Expected<std::string> llvm::getBitcodeProducerString(MemoryBufferRef Buffer) {
5589 Expected<BitstreamCursor> StreamOrErr = initStream(Buffer);
5590 if (!StreamOrErr)
5591 return StreamOrErr.takeError();
5592
5593 return readIdentificationCode(*StreamOrErr);
5594}
5595
5596Expected<std::unique_ptr<ModuleSummaryIndex>>
5597llvm::getModuleSummaryIndex(MemoryBufferRef Buffer) {
5598 Expected<BitcodeModule> BM = getSingleModule(Buffer);
5599 if (!BM)
5600 return BM.takeError();
5601
5602 return BM->getSummary();
5603}
5604
5605Expected<bool> llvm::hasGlobalValueSummary(MemoryBufferRef Buffer) {
5606 Expected<BitcodeModule> BM = getSingleModule(Buffer);
5607 if (!BM)
5608 return BM.takeError();
5609
5610 return BM->hasSummary();
5611}