File: | lib/Bitcode/Reader/BitcodeReader.cpp |
Warning: | line 4336, column 9 Value stored to 'Ty' is never read |
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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 | #include "llvm/ADT/APFloat.h" |
14 | #include "llvm/ADT/APInt.h" |
15 | #include "llvm/ADT/ArrayRef.h" |
16 | #include "llvm/ADT/DenseMap.h" |
17 | #include "llvm/ADT/Optional.h" |
18 | #include "llvm/ADT/STLExtras.h" |
19 | #include "llvm/ADT/SmallString.h" |
20 | #include "llvm/ADT/SmallVector.h" |
21 | #include "llvm/ADT/StringRef.h" |
22 | #include "llvm/ADT/Triple.h" |
23 | #include "llvm/ADT/Twine.h" |
24 | #include "llvm/Bitcode/BitstreamReader.h" |
25 | #include "llvm/Bitcode/LLVMBitCodes.h" |
26 | #include "llvm/Config/llvm-config.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/CallSite.h" |
32 | #include "llvm/IR/CallingConv.h" |
33 | #include "llvm/IR/Comdat.h" |
34 | #include "llvm/IR/Constant.h" |
35 | #include "llvm/IR/Constants.h" |
36 | #include "llvm/IR/DataLayout.h" |
37 | #include "llvm/IR/DebugInfo.h" |
38 | #include "llvm/IR/DebugInfoMetadata.h" |
39 | #include "llvm/IR/DebugLoc.h" |
40 | #include "llvm/IR/DerivedTypes.h" |
41 | #include "llvm/IR/Function.h" |
42 | #include "llvm/IR/GVMaterializer.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/InlineAsm.h" |
50 | #include "llvm/IR/InstIterator.h" |
51 | #include "llvm/IR/InstrTypes.h" |
52 | #include "llvm/IR/Instruction.h" |
53 | #include "llvm/IR/Instructions.h" |
54 | #include "llvm/IR/Intrinsics.h" |
55 | #include "llvm/IR/LLVMContext.h" |
56 | #include "llvm/IR/Metadata.h" |
57 | #include "llvm/IR/Module.h" |
58 | #include "llvm/IR/ModuleSummaryIndex.h" |
59 | #include "llvm/IR/Operator.h" |
60 | #include "llvm/IR/Type.h" |
61 | #include "llvm/IR/Value.h" |
62 | #include "llvm/IR/Verifier.h" |
63 | #include "llvm/Support/AtomicOrdering.h" |
64 | #include "llvm/Support/Casting.h" |
65 | #include "llvm/Support/CommandLine.h" |
66 | #include "llvm/Support/Compiler.h" |
67 | #include "llvm/Support/Debug.h" |
68 | #include "llvm/Support/Error.h" |
69 | #include "llvm/Support/ErrorHandling.h" |
70 | #include "llvm/Support/ErrorOr.h" |
71 | #include "llvm/Support/ManagedStatic.h" |
72 | #include "llvm/Support/MathExtras.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 <map> |
81 | #include <memory> |
82 | #include <set> |
83 | #include <string> |
84 | #include <system_error> |
85 | #include <tuple> |
86 | #include <utility> |
87 | #include <vector> |
88 | |
89 | using namespace llvm; |
90 | |
91 | static 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 | |
96 | namespace { |
97 | |
98 | enum { |
99 | SWITCH_INST_MAGIC = 0x4B5 // May 2012 => 1205 => Hex |
100 | }; |
101 | |
102 | } // end anonymous namespace |
103 | |
104 | static Error error(const Twine &Message) { |
105 | return make_error<StringError>( |
106 | Message, make_error_code(BitcodeError::CorruptedBitcode)); |
107 | } |
108 | |
109 | /// Helper to read the header common to all bitcode files. |
110 | static bool hasValidBitcodeHeader(BitstreamCursor &Stream) { |
111 | // Sniff for the signature. |
112 | if (!Stream.canSkipToPos(4) || |
113 | Stream.Read(8) != 'B' || |
114 | Stream.Read(8) != 'C' || |
115 | Stream.Read(4) != 0x0 || |
116 | Stream.Read(4) != 0xC || |
117 | Stream.Read(4) != 0xE || |
118 | Stream.Read(4) != 0xD) |
119 | return false; |
120 | return true; |
121 | } |
122 | |
123 | static Expected<BitstreamCursor> initStream(MemoryBufferRef Buffer) { |
124 | const unsigned char *BufPtr = (const unsigned char *)Buffer.getBufferStart(); |
125 | const unsigned char *BufEnd = BufPtr + Buffer.getBufferSize(); |
126 | |
127 | if (Buffer.getBufferSize() & 3) |
128 | return error("Invalid bitcode signature"); |
129 | |
130 | // If we have a wrapper header, parse it and ignore the non-bc file contents. |
131 | // The magic number is 0x0B17C0DE stored in little endian. |
132 | if (isBitcodeWrapper(BufPtr, BufEnd)) |
133 | if (SkipBitcodeWrapperHeader(BufPtr, BufEnd, true)) |
134 | return error("Invalid bitcode wrapper header"); |
135 | |
136 | BitstreamCursor Stream(ArrayRef<uint8_t>(BufPtr, BufEnd)); |
137 | if (!hasValidBitcodeHeader(Stream)) |
138 | return error("Invalid bitcode signature"); |
139 | |
140 | return std::move(Stream); |
141 | } |
142 | |
143 | /// Convert a string from a record into an std::string, return true on failure. |
144 | template <typename StrTy> |
145 | static bool convertToString(ArrayRef<uint64_t> Record, unsigned Idx, |
146 | StrTy &Result) { |
147 | if (Idx > Record.size()) |
148 | return true; |
149 | |
150 | for (unsigned i = Idx, e = Record.size(); i != e; ++i) |
151 | Result += (char)Record[i]; |
152 | return false; |
153 | } |
154 | |
155 | // Strip all the TBAA attachment for the module. |
156 | static void stripTBAA(Module *M) { |
157 | for (auto &F : *M) { |
158 | if (F.isMaterializable()) |
159 | continue; |
160 | for (auto &I : instructions(F)) |
161 | I.setMetadata(LLVMContext::MD_tbaa, nullptr); |
162 | } |
163 | } |
164 | |
165 | /// Read the "IDENTIFICATION_BLOCK_ID" block, do some basic enforcement on the |
166 | /// "epoch" encoded in the bitcode, and return the producer name if any. |
167 | static Expected<std::string> readIdentificationBlock(BitstreamCursor &Stream) { |
168 | if (Stream.EnterSubBlock(bitc::IDENTIFICATION_BLOCK_ID)) |
169 | return error("Invalid record"); |
170 | |
171 | // Read all the records. |
172 | SmallVector<uint64_t, 64> Record; |
173 | |
174 | std::string ProducerIdentification; |
175 | |
176 | while (true) { |
177 | BitstreamEntry Entry = Stream.advance(); |
178 | |
179 | switch (Entry.Kind) { |
180 | default: |
181 | case BitstreamEntry::Error: |
182 | return error("Malformed block"); |
183 | case BitstreamEntry::EndBlock: |
184 | return ProducerIdentification; |
185 | case BitstreamEntry::Record: |
186 | // The interesting case. |
187 | break; |
188 | } |
189 | |
190 | // Read a record. |
191 | Record.clear(); |
192 | unsigned BitCode = Stream.readRecord(Entry.ID, Record); |
193 | switch (BitCode) { |
194 | default: // Default behavior: reject |
195 | return error("Invalid value"); |
196 | case bitc::IDENTIFICATION_CODE_STRING: // IDENTIFICATION: [strchr x N] |
197 | convertToString(Record, 0, ProducerIdentification); |
198 | break; |
199 | case bitc::IDENTIFICATION_CODE_EPOCH: { // EPOCH: [epoch#] |
200 | unsigned epoch = (unsigned)Record[0]; |
201 | if (epoch != bitc::BITCODE_CURRENT_EPOCH) { |
202 | return error( |
203 | Twine("Incompatible epoch: Bitcode '") + Twine(epoch) + |
204 | "' vs current: '" + Twine(bitc::BITCODE_CURRENT_EPOCH) + "'"); |
205 | } |
206 | } |
207 | } |
208 | } |
209 | } |
210 | |
211 | static Expected<std::string> readIdentificationCode(BitstreamCursor &Stream) { |
212 | // We expect a number of well-defined blocks, though we don't necessarily |
213 | // need to understand them all. |
214 | while (true) { |
215 | if (Stream.AtEndOfStream()) |
216 | return ""; |
217 | |
218 | BitstreamEntry Entry = Stream.advance(); |
219 | switch (Entry.Kind) { |
220 | case BitstreamEntry::EndBlock: |
221 | case BitstreamEntry::Error: |
222 | return error("Malformed block"); |
223 | |
224 | case BitstreamEntry::SubBlock: |
225 | if (Entry.ID == bitc::IDENTIFICATION_BLOCK_ID) |
226 | return readIdentificationBlock(Stream); |
227 | |
228 | // Ignore other sub-blocks. |
229 | if (Stream.SkipBlock()) |
230 | return error("Malformed block"); |
231 | continue; |
232 | case BitstreamEntry::Record: |
233 | Stream.skipRecord(Entry.ID); |
234 | continue; |
235 | } |
236 | } |
237 | } |
238 | |
239 | static Expected<bool> hasObjCCategoryInModule(BitstreamCursor &Stream) { |
240 | if (Stream.EnterSubBlock(bitc::MODULE_BLOCK_ID)) |
241 | return error("Invalid record"); |
242 | |
243 | SmallVector<uint64_t, 64> Record; |
244 | // Read all the records for this module. |
245 | |
246 | while (true) { |
247 | BitstreamEntry Entry = Stream.advanceSkippingSubblocks(); |
248 | |
249 | switch (Entry.Kind) { |
250 | case BitstreamEntry::SubBlock: // Handled for us already. |
251 | case BitstreamEntry::Error: |
252 | return error("Malformed block"); |
253 | case BitstreamEntry::EndBlock: |
254 | return false; |
255 | case BitstreamEntry::Record: |
256 | // The interesting case. |
257 | break; |
258 | } |
259 | |
260 | // Read a record. |
261 | switch (Stream.readRecord(Entry.ID, Record)) { |
262 | default: |
263 | break; // Default behavior, ignore unknown content. |
264 | case bitc::MODULE_CODE_SECTIONNAME: { // SECTIONNAME: [strchr x N] |
265 | std::string S; |
266 | if (convertToString(Record, 0, S)) |
267 | return error("Invalid record"); |
268 | // Check for the i386 and other (x86_64, ARM) conventions |
269 | if (S.find("__DATA,__objc_catlist") != std::string::npos || |
270 | S.find("__OBJC,__category") != std::string::npos) |
271 | return true; |
272 | break; |
273 | } |
274 | } |
275 | Record.clear(); |
276 | } |
277 | llvm_unreachable("Exit infinite loop")::llvm::llvm_unreachable_internal("Exit infinite loop", "/build/llvm-toolchain-snapshot-8~svn345461/lib/Bitcode/Reader/BitcodeReader.cpp" , 277); |
278 | } |
279 | |
280 | static Expected<bool> hasObjCCategory(BitstreamCursor &Stream) { |
281 | // We expect a number of well-defined blocks, though we don't necessarily |
282 | // need to understand them all. |
283 | while (true) { |
284 | BitstreamEntry Entry = Stream.advance(); |
285 | |
286 | switch (Entry.Kind) { |
287 | case BitstreamEntry::Error: |
288 | return error("Malformed block"); |
289 | case BitstreamEntry::EndBlock: |
290 | return false; |
291 | |
292 | case BitstreamEntry::SubBlock: |
293 | if (Entry.ID == bitc::MODULE_BLOCK_ID) |
294 | return hasObjCCategoryInModule(Stream); |
295 | |
296 | // Ignore other sub-blocks. |
297 | if (Stream.SkipBlock()) |
298 | return error("Malformed block"); |
299 | continue; |
300 | |
301 | case BitstreamEntry::Record: |
302 | Stream.skipRecord(Entry.ID); |
303 | continue; |
304 | } |
305 | } |
306 | } |
307 | |
308 | static Expected<std::string> readModuleTriple(BitstreamCursor &Stream) { |
309 | if (Stream.EnterSubBlock(bitc::MODULE_BLOCK_ID)) |
310 | return error("Invalid record"); |
311 | |
312 | SmallVector<uint64_t, 64> Record; |
313 | |
314 | std::string Triple; |
315 | |
316 | // Read all the records for this module. |
317 | while (true) { |
318 | BitstreamEntry Entry = Stream.advanceSkippingSubblocks(); |
319 | |
320 | switch (Entry.Kind) { |
321 | case BitstreamEntry::SubBlock: // Handled for us already. |
322 | case BitstreamEntry::Error: |
323 | return error("Malformed block"); |
324 | case BitstreamEntry::EndBlock: |
325 | return Triple; |
326 | case BitstreamEntry::Record: |
327 | // The interesting case. |
328 | break; |
329 | } |
330 | |
331 | // Read a record. |
332 | switch (Stream.readRecord(Entry.ID, Record)) { |
333 | default: break; // Default behavior, ignore unknown content. |
334 | case bitc::MODULE_CODE_TRIPLE: { // TRIPLE: [strchr x N] |
335 | std::string S; |
336 | if (convertToString(Record, 0, S)) |
337 | return error("Invalid record"); |
338 | Triple = S; |
339 | break; |
340 | } |
341 | } |
342 | Record.clear(); |
343 | } |
344 | llvm_unreachable("Exit infinite loop")::llvm::llvm_unreachable_internal("Exit infinite loop", "/build/llvm-toolchain-snapshot-8~svn345461/lib/Bitcode/Reader/BitcodeReader.cpp" , 344); |
345 | } |
346 | |
347 | static Expected<std::string> readTriple(BitstreamCursor &Stream) { |
348 | // We expect a number of well-defined blocks, though we don't necessarily |
349 | // need to understand them all. |
350 | while (true) { |
351 | BitstreamEntry Entry = Stream.advance(); |
352 | |
353 | switch (Entry.Kind) { |
354 | case BitstreamEntry::Error: |
355 | return error("Malformed block"); |
356 | case BitstreamEntry::EndBlock: |
357 | return ""; |
358 | |
359 | case BitstreamEntry::SubBlock: |
360 | if (Entry.ID == bitc::MODULE_BLOCK_ID) |
361 | return readModuleTriple(Stream); |
362 | |
363 | // Ignore other sub-blocks. |
364 | if (Stream.SkipBlock()) |
365 | return error("Malformed block"); |
366 | continue; |
367 | |
368 | case BitstreamEntry::Record: |
369 | Stream.skipRecord(Entry.ID); |
370 | continue; |
371 | } |
372 | } |
373 | } |
374 | |
375 | namespace { |
376 | |
377 | class BitcodeReaderBase { |
378 | protected: |
379 | BitcodeReaderBase(BitstreamCursor Stream, StringRef Strtab) |
380 | : Stream(std::move(Stream)), Strtab(Strtab) { |
381 | this->Stream.setBlockInfo(&BlockInfo); |
382 | } |
383 | |
384 | BitstreamBlockInfo BlockInfo; |
385 | BitstreamCursor Stream; |
386 | StringRef Strtab; |
387 | |
388 | /// In version 2 of the bitcode we store names of global values and comdats in |
389 | /// a string table rather than in the VST. |
390 | bool UseStrtab = false; |
391 | |
392 | Expected<unsigned> parseVersionRecord(ArrayRef<uint64_t> Record); |
393 | |
394 | /// If this module uses a string table, pop the reference to the string table |
395 | /// and return the referenced string and the rest of the record. Otherwise |
396 | /// just return the record itself. |
397 | std::pair<StringRef, ArrayRef<uint64_t>> |
398 | readNameFromStrtab(ArrayRef<uint64_t> Record); |
399 | |
400 | bool readBlockInfo(); |
401 | |
402 | // Contains an arbitrary and optional string identifying the bitcode producer |
403 | std::string ProducerIdentification; |
404 | |
405 | Error error(const Twine &Message); |
406 | }; |
407 | |
408 | } // end anonymous namespace |
409 | |
410 | Error BitcodeReaderBase::error(const Twine &Message) { |
411 | std::string FullMsg = Message.str(); |
412 | if (!ProducerIdentification.empty()) |
413 | FullMsg += " (Producer: '" + ProducerIdentification + "' Reader: 'LLVM " + |
414 | LLVM_VERSION_STRING"8.0.0" "')"; |
415 | return ::error(FullMsg); |
416 | } |
417 | |
418 | Expected<unsigned> |
419 | BitcodeReaderBase::parseVersionRecord(ArrayRef<uint64_t> Record) { |
420 | if (Record.empty()) |
421 | return error("Invalid record"); |
422 | unsigned ModuleVersion = Record[0]; |
423 | if (ModuleVersion > 2) |
424 | return error("Invalid value"); |
425 | UseStrtab = ModuleVersion >= 2; |
426 | return ModuleVersion; |
427 | } |
428 | |
429 | std::pair<StringRef, ArrayRef<uint64_t>> |
430 | BitcodeReaderBase::readNameFromStrtab(ArrayRef<uint64_t> Record) { |
431 | if (!UseStrtab) |
432 | return {"", Record}; |
433 | // Invalid reference. Let the caller complain about the record being empty. |
434 | if (Record[0] + Record[1] > Strtab.size()) |
435 | return {"", {}}; |
436 | return {StringRef(Strtab.data() + Record[0], Record[1]), Record.slice(2)}; |
437 | } |
438 | |
439 | namespace { |
440 | |
441 | class BitcodeReader : public BitcodeReaderBase, public GVMaterializer { |
442 | LLVMContext &Context; |
443 | Module *TheModule = nullptr; |
444 | // Next offset to start scanning for lazy parsing of function bodies. |
445 | uint64_t NextUnreadBit = 0; |
446 | // Last function offset found in the VST. |
447 | uint64_t LastFunctionBlockBit = 0; |
448 | bool SeenValueSymbolTable = false; |
449 | uint64_t VSTOffset = 0; |
450 | |
451 | std::vector<std::string> SectionTable; |
452 | std::vector<std::string> GCTable; |
453 | |
454 | std::vector<Type*> TypeList; |
455 | BitcodeReaderValueList ValueList; |
456 | Optional<MetadataLoader> MDLoader; |
457 | std::vector<Comdat *> ComdatList; |
458 | SmallVector<Instruction *, 64> InstructionList; |
459 | |
460 | std::vector<std::pair<GlobalVariable *, unsigned>> GlobalInits; |
461 | std::vector<std::pair<GlobalIndirectSymbol *, unsigned>> IndirectSymbolInits; |
462 | std::vector<std::pair<Function *, unsigned>> FunctionPrefixes; |
463 | std::vector<std::pair<Function *, unsigned>> FunctionPrologues; |
464 | std::vector<std::pair<Function *, unsigned>> FunctionPersonalityFns; |
465 | |
466 | /// The set of attributes by index. Index zero in the file is for null, and |
467 | /// is thus not represented here. As such all indices are off by one. |
468 | std::vector<AttributeList> MAttributes; |
469 | |
470 | /// The set of attribute groups. |
471 | std::map<unsigned, AttributeList> MAttributeGroups; |
472 | |
473 | /// While parsing a function body, this is a list of the basic blocks for the |
474 | /// function. |
475 | std::vector<BasicBlock*> FunctionBBs; |
476 | |
477 | // When reading the module header, this list is populated with functions that |
478 | // have bodies later in the file. |
479 | std::vector<Function*> FunctionsWithBodies; |
480 | |
481 | // When intrinsic functions are encountered which require upgrading they are |
482 | // stored here with their replacement function. |
483 | using UpdatedIntrinsicMap = DenseMap<Function *, Function *>; |
484 | UpdatedIntrinsicMap UpgradedIntrinsics; |
485 | // Intrinsics which were remangled because of types rename |
486 | UpdatedIntrinsicMap RemangledIntrinsics; |
487 | |
488 | // Several operations happen after the module header has been read, but |
489 | // before function bodies are processed. This keeps track of whether |
490 | // we've done this yet. |
491 | bool SeenFirstFunctionBody = false; |
492 | |
493 | /// When function bodies are initially scanned, this map contains info about |
494 | /// where to find deferred function body in the stream. |
495 | DenseMap<Function*, uint64_t> DeferredFunctionInfo; |
496 | |
497 | /// When Metadata block is initially scanned when parsing the module, we may |
498 | /// choose to defer parsing of the metadata. This vector contains info about |
499 | /// which Metadata blocks are deferred. |
500 | std::vector<uint64_t> DeferredMetadataInfo; |
501 | |
502 | /// These are basic blocks forward-referenced by block addresses. They are |
503 | /// inserted lazily into functions when they're loaded. The basic block ID is |
504 | /// its index into the vector. |
505 | DenseMap<Function *, std::vector<BasicBlock *>> BasicBlockFwdRefs; |
506 | std::deque<Function *> BasicBlockFwdRefQueue; |
507 | |
508 | /// Indicates that we are using a new encoding for instruction operands where |
509 | /// most operands in the current FUNCTION_BLOCK are encoded relative to the |
510 | /// instruction number, for a more compact encoding. Some instruction |
511 | /// operands are not relative to the instruction ID: basic block numbers, and |
512 | /// types. Once the old style function blocks have been phased out, we would |
513 | /// not need this flag. |
514 | bool UseRelativeIDs = false; |
515 | |
516 | /// True if all functions will be materialized, negating the need to process |
517 | /// (e.g.) blockaddress forward references. |
518 | bool WillMaterializeAllForwardRefs = false; |
519 | |
520 | bool StripDebugInfo = false; |
521 | TBAAVerifier TBAAVerifyHelper; |
522 | |
523 | std::vector<std::string> BundleTags; |
524 | SmallVector<SyncScope::ID, 8> SSIDs; |
525 | |
526 | public: |
527 | BitcodeReader(BitstreamCursor Stream, StringRef Strtab, |
528 | StringRef ProducerIdentification, LLVMContext &Context); |
529 | |
530 | Error materializeForwardReferencedFunctions(); |
531 | |
532 | Error materialize(GlobalValue *GV) override; |
533 | Error materializeModule() override; |
534 | std::vector<StructType *> getIdentifiedStructTypes() const override; |
535 | |
536 | /// Main interface to parsing a bitcode buffer. |
537 | /// \returns true if an error occurred. |
538 | Error parseBitcodeInto(Module *M, bool ShouldLazyLoadMetadata = false, |
539 | bool IsImporting = false); |
540 | |
541 | static uint64_t decodeSignRotatedValue(uint64_t V); |
542 | |
543 | /// Materialize any deferred Metadata block. |
544 | Error materializeMetadata() override; |
545 | |
546 | void setStripDebugInfo() override; |
547 | |
548 | private: |
549 | std::vector<StructType *> IdentifiedStructTypes; |
550 | StructType *createIdentifiedStructType(LLVMContext &Context, StringRef Name); |
551 | StructType *createIdentifiedStructType(LLVMContext &Context); |
552 | |
553 | Type *getTypeByID(unsigned ID); |
554 | |
555 | Value *getFnValueByID(unsigned ID, Type *Ty) { |
556 | if (Ty && Ty->isMetadataTy()) |
557 | return MetadataAsValue::get(Ty->getContext(), getFnMetadataByID(ID)); |
558 | return ValueList.getValueFwdRef(ID, Ty); |
559 | } |
560 | |
561 | Metadata *getFnMetadataByID(unsigned ID) { |
562 | return MDLoader->getMetadataFwdRefOrLoad(ID); |
563 | } |
564 | |
565 | BasicBlock *getBasicBlock(unsigned ID) const { |
566 | if (ID >= FunctionBBs.size()) return nullptr; // Invalid ID |
567 | return FunctionBBs[ID]; |
568 | } |
569 | |
570 | AttributeList getAttributes(unsigned i) const { |
571 | if (i-1 < MAttributes.size()) |
572 | return MAttributes[i-1]; |
573 | return AttributeList(); |
574 | } |
575 | |
576 | /// Read a value/type pair out of the specified record from slot 'Slot'. |
577 | /// Increment Slot past the number of slots used in the record. Return true on |
578 | /// failure. |
579 | bool getValueTypePair(SmallVectorImpl<uint64_t> &Record, unsigned &Slot, |
580 | unsigned InstNum, Value *&ResVal) { |
581 | if (Slot == Record.size()) return true; |
582 | unsigned ValNo = (unsigned)Record[Slot++]; |
583 | // Adjust the ValNo, if it was encoded relative to the InstNum. |
584 | if (UseRelativeIDs) |
585 | ValNo = InstNum - ValNo; |
586 | if (ValNo < InstNum) { |
587 | // If this is not a forward reference, just return the value we already |
588 | // have. |
589 | ResVal = getFnValueByID(ValNo, nullptr); |
590 | return ResVal == nullptr; |
591 | } |
592 | if (Slot == Record.size()) |
593 | return true; |
594 | |
595 | unsigned TypeNo = (unsigned)Record[Slot++]; |
596 | ResVal = getFnValueByID(ValNo, getTypeByID(TypeNo)); |
597 | return ResVal == nullptr; |
598 | } |
599 | |
600 | /// Read a value out of the specified record from slot 'Slot'. Increment Slot |
601 | /// past the number of slots used by the value in the record. Return true if |
602 | /// there is an error. |
603 | bool popValue(SmallVectorImpl<uint64_t> &Record, unsigned &Slot, |
604 | unsigned InstNum, Type *Ty, Value *&ResVal) { |
605 | if (getValue(Record, Slot, InstNum, Ty, ResVal)) |
606 | return true; |
607 | // All values currently take a single record slot. |
608 | ++Slot; |
609 | return false; |
610 | } |
611 | |
612 | /// Like popValue, but does not increment the Slot number. |
613 | bool getValue(SmallVectorImpl<uint64_t> &Record, unsigned Slot, |
614 | unsigned InstNum, Type *Ty, Value *&ResVal) { |
615 | ResVal = getValue(Record, Slot, InstNum, Ty); |
616 | return ResVal == nullptr; |
617 | } |
618 | |
619 | /// Version of getValue that returns ResVal directly, or 0 if there is an |
620 | /// error. |
621 | Value *getValue(SmallVectorImpl<uint64_t> &Record, unsigned Slot, |
622 | unsigned InstNum, Type *Ty) { |
623 | if (Slot == Record.size()) return nullptr; |
624 | unsigned ValNo = (unsigned)Record[Slot]; |
625 | // Adjust the ValNo, if it was encoded relative to the InstNum. |
626 | if (UseRelativeIDs) |
627 | ValNo = InstNum - ValNo; |
628 | return getFnValueByID(ValNo, Ty); |
629 | } |
630 | |
631 | /// Like getValue, but decodes signed VBRs. |
632 | Value *getValueSigned(SmallVectorImpl<uint64_t> &Record, unsigned Slot, |
633 | unsigned InstNum, Type *Ty) { |
634 | if (Slot == Record.size()) return nullptr; |
635 | unsigned ValNo = (unsigned)decodeSignRotatedValue(Record[Slot]); |
636 | // Adjust the ValNo, if it was encoded relative to the InstNum. |
637 | if (UseRelativeIDs) |
638 | ValNo = InstNum - ValNo; |
639 | return getFnValueByID(ValNo, Ty); |
640 | } |
641 | |
642 | /// Converts alignment exponent (i.e. power of two (or zero)) to the |
643 | /// corresponding alignment to use. If alignment is too large, returns |
644 | /// a corresponding error code. |
645 | Error parseAlignmentValue(uint64_t Exponent, unsigned &Alignment); |
646 | Error parseAttrKind(uint64_t Code, Attribute::AttrKind *Kind); |
647 | Error parseModule(uint64_t ResumeBit, bool ShouldLazyLoadMetadata = false); |
648 | |
649 | Error parseComdatRecord(ArrayRef<uint64_t> Record); |
650 | Error parseGlobalVarRecord(ArrayRef<uint64_t> Record); |
651 | Error parseFunctionRecord(ArrayRef<uint64_t> Record); |
652 | Error parseGlobalIndirectSymbolRecord(unsigned BitCode, |
653 | ArrayRef<uint64_t> Record); |
654 | |
655 | Error parseAttributeBlock(); |
656 | Error parseAttributeGroupBlock(); |
657 | Error parseTypeTable(); |
658 | Error parseTypeTableBody(); |
659 | Error parseOperandBundleTags(); |
660 | Error parseSyncScopeNames(); |
661 | |
662 | Expected<Value *> recordValue(SmallVectorImpl<uint64_t> &Record, |
663 | unsigned NameIndex, Triple &TT); |
664 | void setDeferredFunctionInfo(unsigned FuncBitcodeOffsetDelta, Function *F, |
665 | ArrayRef<uint64_t> Record); |
666 | Error parseValueSymbolTable(uint64_t Offset = 0); |
667 | Error parseGlobalValueSymbolTable(); |
668 | Error parseConstants(); |
669 | Error rememberAndSkipFunctionBodies(); |
670 | Error rememberAndSkipFunctionBody(); |
671 | /// Save the positions of the Metadata blocks and skip parsing the blocks. |
672 | Error rememberAndSkipMetadata(); |
673 | Error typeCheckLoadStoreInst(Type *ValType, Type *PtrType); |
674 | Error parseFunctionBody(Function *F); |
675 | Error globalCleanup(); |
676 | Error resolveGlobalAndIndirectSymbolInits(); |
677 | Error parseUseLists(); |
678 | Error findFunctionInStream( |
679 | Function *F, |
680 | DenseMap<Function *, uint64_t>::iterator DeferredFunctionInfoIterator); |
681 | |
682 | SyncScope::ID getDecodedSyncScopeID(unsigned Val); |
683 | }; |
684 | |
685 | /// Class to manage reading and parsing function summary index bitcode |
686 | /// files/sections. |
687 | class ModuleSummaryIndexBitcodeReader : public BitcodeReaderBase { |
688 | /// The module index built during parsing. |
689 | ModuleSummaryIndex &TheIndex; |
690 | |
691 | /// Indicates whether we have encountered a global value summary section |
692 | /// yet during parsing. |
693 | bool SeenGlobalValSummary = false; |
694 | |
695 | /// Indicates whether we have already parsed the VST, used for error checking. |
696 | bool SeenValueSymbolTable = false; |
697 | |
698 | /// Set to the offset of the VST recorded in the MODULE_CODE_VSTOFFSET record. |
699 | /// Used to enable on-demand parsing of the VST. |
700 | uint64_t VSTOffset = 0; |
701 | |
702 | // Map to save ValueId to ValueInfo association that was recorded in the |
703 | // ValueSymbolTable. It is used after the VST is parsed to convert |
704 | // call graph edges read from the function summary from referencing |
705 | // callees by their ValueId to using the ValueInfo instead, which is how |
706 | // they are recorded in the summary index being built. |
707 | // We save a GUID which refers to the same global as the ValueInfo, but |
708 | // ignoring the linkage, i.e. for values other than local linkage they are |
709 | // identical. |
710 | DenseMap<unsigned, std::pair<ValueInfo, GlobalValue::GUID>> |
711 | ValueIdToValueInfoMap; |
712 | |
713 | /// Map populated during module path string table parsing, from the |
714 | /// module ID to a string reference owned by the index's module |
715 | /// path string table, used to correlate with combined index |
716 | /// summary records. |
717 | DenseMap<uint64_t, StringRef> ModuleIdMap; |
718 | |
719 | /// Original source file name recorded in a bitcode record. |
720 | std::string SourceFileName; |
721 | |
722 | /// The string identifier given to this module by the client, normally the |
723 | /// path to the bitcode file. |
724 | StringRef ModulePath; |
725 | |
726 | /// For per-module summary indexes, the unique numerical identifier given to |
727 | /// this module by the client. |
728 | unsigned ModuleId; |
729 | |
730 | public: |
731 | ModuleSummaryIndexBitcodeReader(BitstreamCursor Stream, StringRef Strtab, |
732 | ModuleSummaryIndex &TheIndex, |
733 | StringRef ModulePath, unsigned ModuleId); |
734 | |
735 | Error parseModule(); |
736 | |
737 | private: |
738 | void setValueGUID(uint64_t ValueID, StringRef ValueName, |
739 | GlobalValue::LinkageTypes Linkage, |
740 | StringRef SourceFileName); |
741 | Error parseValueSymbolTable( |
742 | uint64_t Offset, |
743 | DenseMap<unsigned, GlobalValue::LinkageTypes> &ValueIdToLinkageMap); |
744 | std::vector<ValueInfo> makeRefList(ArrayRef<uint64_t> Record); |
745 | std::vector<FunctionSummary::EdgeTy> makeCallList(ArrayRef<uint64_t> Record, |
746 | bool IsOldProfileFormat, |
747 | bool HasProfile, |
748 | bool HasRelBF); |
749 | Error parseEntireSummary(unsigned ID); |
750 | Error parseModuleStringTable(); |
751 | |
752 | std::pair<ValueInfo, GlobalValue::GUID> |
753 | getValueInfoFromValueId(unsigned ValueId); |
754 | |
755 | void addThisModule(); |
756 | ModuleSummaryIndex::ModuleInfo *getThisModule(); |
757 | }; |
758 | |
759 | } // end anonymous namespace |
760 | |
761 | std::error_code llvm::errorToErrorCodeAndEmitErrors(LLVMContext &Ctx, |
762 | Error Err) { |
763 | if (Err) { |
764 | std::error_code EC; |
765 | handleAllErrors(std::move(Err), [&](ErrorInfoBase &EIB) { |
766 | EC = EIB.convertToErrorCode(); |
767 | Ctx.emitError(EIB.message()); |
768 | }); |
769 | return EC; |
770 | } |
771 | return std::error_code(); |
772 | } |
773 | |
774 | BitcodeReader::BitcodeReader(BitstreamCursor Stream, StringRef Strtab, |
775 | StringRef ProducerIdentification, |
776 | LLVMContext &Context) |
777 | : BitcodeReaderBase(std::move(Stream), Strtab), Context(Context), |
778 | ValueList(Context) { |
779 | this->ProducerIdentification = ProducerIdentification; |
780 | } |
781 | |
782 | Error BitcodeReader::materializeForwardReferencedFunctions() { |
783 | if (WillMaterializeAllForwardRefs) |
784 | return Error::success(); |
785 | |
786 | // Prevent recursion. |
787 | WillMaterializeAllForwardRefs = true; |
788 | |
789 | while (!BasicBlockFwdRefQueue.empty()) { |
790 | Function *F = BasicBlockFwdRefQueue.front(); |
791 | BasicBlockFwdRefQueue.pop_front(); |
792 | assert(F && "Expected valid function")((F && "Expected valid function") ? static_cast<void > (0) : __assert_fail ("F && \"Expected valid function\"" , "/build/llvm-toolchain-snapshot-8~svn345461/lib/Bitcode/Reader/BitcodeReader.cpp" , 792, __PRETTY_FUNCTION__)); |
793 | if (!BasicBlockFwdRefs.count(F)) |
794 | // Already materialized. |
795 | continue; |
796 | |
797 | // Check for a function that isn't materializable to prevent an infinite |
798 | // loop. When parsing a blockaddress stored in a global variable, there |
799 | // isn't a trivial way to check if a function will have a body without a |
800 | // linear search through FunctionsWithBodies, so just check it here. |
801 | if (!F->isMaterializable()) |
802 | return error("Never resolved function from blockaddress"); |
803 | |
804 | // Try to materialize F. |
805 | if (Error Err = materialize(F)) |
806 | return Err; |
807 | } |
808 | 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\"" , "/build/llvm-toolchain-snapshot-8~svn345461/lib/Bitcode/Reader/BitcodeReader.cpp" , 808, __PRETTY_FUNCTION__)); |
809 | |
810 | // Reset state. |
811 | WillMaterializeAllForwardRefs = false; |
812 | return Error::success(); |
813 | } |
814 | |
815 | //===----------------------------------------------------------------------===// |
816 | // Helper functions to implement forward reference resolution, etc. |
817 | //===----------------------------------------------------------------------===// |
818 | |
819 | static bool hasImplicitComdat(size_t Val) { |
820 | switch (Val) { |
821 | default: |
822 | return false; |
823 | case 1: // Old WeakAnyLinkage |
824 | case 4: // Old LinkOnceAnyLinkage |
825 | case 10: // Old WeakODRLinkage |
826 | case 11: // Old LinkOnceODRLinkage |
827 | return true; |
828 | } |
829 | } |
830 | |
831 | static GlobalValue::LinkageTypes getDecodedLinkage(unsigned Val) { |
832 | switch (Val) { |
833 | default: // Map unknown/new linkages to external |
834 | case 0: |
835 | return GlobalValue::ExternalLinkage; |
836 | case 2: |
837 | return GlobalValue::AppendingLinkage; |
838 | case 3: |
839 | return GlobalValue::InternalLinkage; |
840 | case 5: |
841 | return GlobalValue::ExternalLinkage; // Obsolete DLLImportLinkage |
842 | case 6: |
843 | return GlobalValue::ExternalLinkage; // Obsolete DLLExportLinkage |
844 | case 7: |
845 | return GlobalValue::ExternalWeakLinkage; |
846 | case 8: |
847 | return GlobalValue::CommonLinkage; |
848 | case 9: |
849 | return GlobalValue::PrivateLinkage; |
850 | case 12: |
851 | return GlobalValue::AvailableExternallyLinkage; |
852 | case 13: |
853 | return GlobalValue::PrivateLinkage; // Obsolete LinkerPrivateLinkage |
854 | case 14: |
855 | return GlobalValue::PrivateLinkage; // Obsolete LinkerPrivateWeakLinkage |
856 | case 15: |
857 | return GlobalValue::ExternalLinkage; // Obsolete LinkOnceODRAutoHideLinkage |
858 | case 1: // Old value with implicit comdat. |
859 | case 16: |
860 | return GlobalValue::WeakAnyLinkage; |
861 | case 10: // Old value with implicit comdat. |
862 | case 17: |
863 | return GlobalValue::WeakODRLinkage; |
864 | case 4: // Old value with implicit comdat. |
865 | case 18: |
866 | return GlobalValue::LinkOnceAnyLinkage; |
867 | case 11: // Old value with implicit comdat. |
868 | case 19: |
869 | return GlobalValue::LinkOnceODRLinkage; |
870 | } |
871 | } |
872 | |
873 | static FunctionSummary::FFlags getDecodedFFlags(uint64_t RawFlags) { |
874 | FunctionSummary::FFlags Flags; |
875 | Flags.ReadNone = RawFlags & 0x1; |
876 | Flags.ReadOnly = (RawFlags >> 1) & 0x1; |
877 | Flags.NoRecurse = (RawFlags >> 2) & 0x1; |
878 | Flags.ReturnDoesNotAlias = (RawFlags >> 3) & 0x1; |
879 | return Flags; |
880 | } |
881 | |
882 | /// Decode the flags for GlobalValue in the summary. |
883 | static GlobalValueSummary::GVFlags getDecodedGVSummaryFlags(uint64_t RawFlags, |
884 | uint64_t Version) { |
885 | // Summary were not emitted before LLVM 3.9, we don't need to upgrade Linkage |
886 | // like getDecodedLinkage() above. Any future change to the linkage enum and |
887 | // to getDecodedLinkage() will need to be taken into account here as above. |
888 | auto Linkage = GlobalValue::LinkageTypes(RawFlags & 0xF); // 4 bits |
889 | RawFlags = RawFlags >> 4; |
890 | bool NotEligibleToImport = (RawFlags & 0x1) || Version < 3; |
891 | // The Live flag wasn't introduced until version 3. For dead stripping |
892 | // to work correctly on earlier versions, we must conservatively treat all |
893 | // values as live. |
894 | bool Live = (RawFlags & 0x2) || Version < 3; |
895 | bool Local = (RawFlags & 0x4); |
896 | |
897 | return GlobalValueSummary::GVFlags(Linkage, NotEligibleToImport, Live, Local); |
898 | } |
899 | |
900 | static GlobalValue::VisibilityTypes getDecodedVisibility(unsigned Val) { |
901 | switch (Val) { |
902 | default: // Map unknown visibilities to default. |
903 | case 0: return GlobalValue::DefaultVisibility; |
904 | case 1: return GlobalValue::HiddenVisibility; |
905 | case 2: return GlobalValue::ProtectedVisibility; |
906 | } |
907 | } |
908 | |
909 | static GlobalValue::DLLStorageClassTypes |
910 | getDecodedDLLStorageClass(unsigned Val) { |
911 | switch (Val) { |
912 | default: // Map unknown values to default. |
913 | case 0: return GlobalValue::DefaultStorageClass; |
914 | case 1: return GlobalValue::DLLImportStorageClass; |
915 | case 2: return GlobalValue::DLLExportStorageClass; |
916 | } |
917 | } |
918 | |
919 | static bool getDecodedDSOLocal(unsigned Val) { |
920 | switch(Val) { |
921 | default: // Map unknown values to preemptable. |
922 | case 0: return false; |
923 | case 1: return true; |
924 | } |
925 | } |
926 | |
927 | static GlobalVariable::ThreadLocalMode getDecodedThreadLocalMode(unsigned Val) { |
928 | switch (Val) { |
929 | case 0: return GlobalVariable::NotThreadLocal; |
930 | default: // Map unknown non-zero value to general dynamic. |
931 | case 1: return GlobalVariable::GeneralDynamicTLSModel; |
932 | case 2: return GlobalVariable::LocalDynamicTLSModel; |
933 | case 3: return GlobalVariable::InitialExecTLSModel; |
934 | case 4: return GlobalVariable::LocalExecTLSModel; |
935 | } |
936 | } |
937 | |
938 | static GlobalVariable::UnnamedAddr getDecodedUnnamedAddrType(unsigned Val) { |
939 | switch (Val) { |
940 | default: // Map unknown to UnnamedAddr::None. |
941 | case 0: return GlobalVariable::UnnamedAddr::None; |
942 | case 1: return GlobalVariable::UnnamedAddr::Global; |
943 | case 2: return GlobalVariable::UnnamedAddr::Local; |
944 | } |
945 | } |
946 | |
947 | static int getDecodedCastOpcode(unsigned Val) { |
948 | switch (Val) { |
949 | default: return -1; |
950 | case bitc::CAST_TRUNC : return Instruction::Trunc; |
951 | case bitc::CAST_ZEXT : return Instruction::ZExt; |
952 | case bitc::CAST_SEXT : return Instruction::SExt; |
953 | case bitc::CAST_FPTOUI : return Instruction::FPToUI; |
954 | case bitc::CAST_FPTOSI : return Instruction::FPToSI; |
955 | case bitc::CAST_UITOFP : return Instruction::UIToFP; |
956 | case bitc::CAST_SITOFP : return Instruction::SIToFP; |
957 | case bitc::CAST_FPTRUNC : return Instruction::FPTrunc; |
958 | case bitc::CAST_FPEXT : return Instruction::FPExt; |
959 | case bitc::CAST_PTRTOINT: return Instruction::PtrToInt; |
960 | case bitc::CAST_INTTOPTR: return Instruction::IntToPtr; |
961 | case bitc::CAST_BITCAST : return Instruction::BitCast; |
962 | case bitc::CAST_ADDRSPACECAST: return Instruction::AddrSpaceCast; |
963 | } |
964 | } |
965 | |
966 | static int getDecodedBinaryOpcode(unsigned Val, Type *Ty) { |
967 | bool IsFP = Ty->isFPOrFPVectorTy(); |
968 | // BinOps are only valid for int/fp or vector of int/fp types |
969 | if (!IsFP && !Ty->isIntOrIntVectorTy()) |
970 | return -1; |
971 | |
972 | switch (Val) { |
973 | default: |
974 | return -1; |
975 | case bitc::BINOP_ADD: |
976 | return IsFP ? Instruction::FAdd : Instruction::Add; |
977 | case bitc::BINOP_SUB: |
978 | return IsFP ? Instruction::FSub : Instruction::Sub; |
979 | case bitc::BINOP_MUL: |
980 | return IsFP ? Instruction::FMul : Instruction::Mul; |
981 | case bitc::BINOP_UDIV: |
982 | return IsFP ? -1 : Instruction::UDiv; |
983 | case bitc::BINOP_SDIV: |
984 | return IsFP ? Instruction::FDiv : Instruction::SDiv; |
985 | case bitc::BINOP_UREM: |
986 | return IsFP ? -1 : Instruction::URem; |
987 | case bitc::BINOP_SREM: |
988 | return IsFP ? Instruction::FRem : Instruction::SRem; |
989 | case bitc::BINOP_SHL: |
990 | return IsFP ? -1 : Instruction::Shl; |
991 | case bitc::BINOP_LSHR: |
992 | return IsFP ? -1 : Instruction::LShr; |
993 | case bitc::BINOP_ASHR: |
994 | return IsFP ? -1 : Instruction::AShr; |
995 | case bitc::BINOP_AND: |
996 | return IsFP ? -1 : Instruction::And; |
997 | case bitc::BINOP_OR: |
998 | return IsFP ? -1 : Instruction::Or; |
999 | case bitc::BINOP_XOR: |
1000 | return IsFP ? -1 : Instruction::Xor; |
1001 | } |
1002 | } |
1003 | |
1004 | static AtomicRMWInst::BinOp getDecodedRMWOperation(unsigned Val) { |
1005 | switch (Val) { |
1006 | default: return AtomicRMWInst::BAD_BINOP; |
1007 | case bitc::RMW_XCHG: return AtomicRMWInst::Xchg; |
1008 | case bitc::RMW_ADD: return AtomicRMWInst::Add; |
1009 | case bitc::RMW_SUB: return AtomicRMWInst::Sub; |
1010 | case bitc::RMW_AND: return AtomicRMWInst::And; |
1011 | case bitc::RMW_NAND: return AtomicRMWInst::Nand; |
1012 | case bitc::RMW_OR: return AtomicRMWInst::Or; |
1013 | case bitc::RMW_XOR: return AtomicRMWInst::Xor; |
1014 | case bitc::RMW_MAX: return AtomicRMWInst::Max; |
1015 | case bitc::RMW_MIN: return AtomicRMWInst::Min; |
1016 | case bitc::RMW_UMAX: return AtomicRMWInst::UMax; |
1017 | case bitc::RMW_UMIN: return AtomicRMWInst::UMin; |
1018 | } |
1019 | } |
1020 | |
1021 | static AtomicOrdering getDecodedOrdering(unsigned Val) { |
1022 | switch (Val) { |
1023 | case bitc::ORDERING_NOTATOMIC: return AtomicOrdering::NotAtomic; |
1024 | case bitc::ORDERING_UNORDERED: return AtomicOrdering::Unordered; |
1025 | case bitc::ORDERING_MONOTONIC: return AtomicOrdering::Monotonic; |
1026 | case bitc::ORDERING_ACQUIRE: return AtomicOrdering::Acquire; |
1027 | case bitc::ORDERING_RELEASE: return AtomicOrdering::Release; |
1028 | case bitc::ORDERING_ACQREL: return AtomicOrdering::AcquireRelease; |
1029 | default: // Map unknown orderings to sequentially-consistent. |
1030 | case bitc::ORDERING_SEQCST: return AtomicOrdering::SequentiallyConsistent; |
1031 | } |
1032 | } |
1033 | |
1034 | static Comdat::SelectionKind getDecodedComdatSelectionKind(unsigned Val) { |
1035 | switch (Val) { |
1036 | default: // Map unknown selection kinds to any. |
1037 | case bitc::COMDAT_SELECTION_KIND_ANY: |
1038 | return Comdat::Any; |
1039 | case bitc::COMDAT_SELECTION_KIND_EXACT_MATCH: |
1040 | return Comdat::ExactMatch; |
1041 | case bitc::COMDAT_SELECTION_KIND_LARGEST: |
1042 | return Comdat::Largest; |
1043 | case bitc::COMDAT_SELECTION_KIND_NO_DUPLICATES: |
1044 | return Comdat::NoDuplicates; |
1045 | case bitc::COMDAT_SELECTION_KIND_SAME_SIZE: |
1046 | return Comdat::SameSize; |
1047 | } |
1048 | } |
1049 | |
1050 | static FastMathFlags getDecodedFastMathFlags(unsigned Val) { |
1051 | FastMathFlags FMF; |
1052 | if (0 != (Val & bitc::UnsafeAlgebra)) |
1053 | FMF.setFast(); |
1054 | if (0 != (Val & bitc::AllowReassoc)) |
1055 | FMF.setAllowReassoc(); |
1056 | if (0 != (Val & bitc::NoNaNs)) |
1057 | FMF.setNoNaNs(); |
1058 | if (0 != (Val & bitc::NoInfs)) |
1059 | FMF.setNoInfs(); |
1060 | if (0 != (Val & bitc::NoSignedZeros)) |
1061 | FMF.setNoSignedZeros(); |
1062 | if (0 != (Val & bitc::AllowReciprocal)) |
1063 | FMF.setAllowReciprocal(); |
1064 | if (0 != (Val & bitc::AllowContract)) |
1065 | FMF.setAllowContract(true); |
1066 | if (0 != (Val & bitc::ApproxFunc)) |
1067 | FMF.setApproxFunc(); |
1068 | return FMF; |
1069 | } |
1070 | |
1071 | static void upgradeDLLImportExportLinkage(GlobalValue *GV, unsigned Val) { |
1072 | switch (Val) { |
1073 | case 5: GV->setDLLStorageClass(GlobalValue::DLLImportStorageClass); break; |
1074 | case 6: GV->setDLLStorageClass(GlobalValue::DLLExportStorageClass); break; |
1075 | } |
1076 | } |
1077 | |
1078 | Type *BitcodeReader::getTypeByID(unsigned ID) { |
1079 | // The type table size is always specified correctly. |
1080 | if (ID >= TypeList.size()) |
1081 | return nullptr; |
1082 | |
1083 | if (Type *Ty = TypeList[ID]) |
1084 | return Ty; |
1085 | |
1086 | // If we have a forward reference, the only possible case is when it is to a |
1087 | // named struct. Just create a placeholder for now. |
1088 | return TypeList[ID] = createIdentifiedStructType(Context); |
1089 | } |
1090 | |
1091 | StructType *BitcodeReader::createIdentifiedStructType(LLVMContext &Context, |
1092 | StringRef Name) { |
1093 | auto *Ret = StructType::create(Context, Name); |
1094 | IdentifiedStructTypes.push_back(Ret); |
1095 | return Ret; |
1096 | } |
1097 | |
1098 | StructType *BitcodeReader::createIdentifiedStructType(LLVMContext &Context) { |
1099 | auto *Ret = StructType::create(Context); |
1100 | IdentifiedStructTypes.push_back(Ret); |
1101 | return Ret; |
1102 | } |
1103 | |
1104 | //===----------------------------------------------------------------------===// |
1105 | // Functions for parsing blocks from the bitcode file |
1106 | //===----------------------------------------------------------------------===// |
1107 | |
1108 | static uint64_t getRawAttributeMask(Attribute::AttrKind Val) { |
1109 | switch (Val) { |
1110 | case Attribute::EndAttrKinds: |
1111 | llvm_unreachable("Synthetic enumerators which should never get here")::llvm::llvm_unreachable_internal("Synthetic enumerators which should never get here" , "/build/llvm-toolchain-snapshot-8~svn345461/lib/Bitcode/Reader/BitcodeReader.cpp" , 1111); |
1112 | |
1113 | case Attribute::None: return 0; |
1114 | case Attribute::ZExt: return 1 << 0; |
1115 | case Attribute::SExt: return 1 << 1; |
1116 | case Attribute::NoReturn: return 1 << 2; |
1117 | case Attribute::InReg: return 1 << 3; |
1118 | case Attribute::StructRet: return 1 << 4; |
1119 | case Attribute::NoUnwind: return 1 << 5; |
1120 | case Attribute::NoAlias: return 1 << 6; |
1121 | case Attribute::ByVal: return 1 << 7; |
1122 | case Attribute::Nest: return 1 << 8; |
1123 | case Attribute::ReadNone: return 1 << 9; |
1124 | case Attribute::ReadOnly: return 1 << 10; |
1125 | case Attribute::NoInline: return 1 << 11; |
1126 | case Attribute::AlwaysInline: return 1 << 12; |
1127 | case Attribute::OptimizeForSize: return 1 << 13; |
1128 | case Attribute::StackProtect: return 1 << 14; |
1129 | case Attribute::StackProtectReq: return 1 << 15; |
1130 | case Attribute::Alignment: return 31 << 16; |
1131 | case Attribute::NoCapture: return 1 << 21; |
1132 | case Attribute::NoRedZone: return 1 << 22; |
1133 | case Attribute::NoImplicitFloat: return 1 << 23; |
1134 | case Attribute::Naked: return 1 << 24; |
1135 | case Attribute::InlineHint: return 1 << 25; |
1136 | case Attribute::StackAlignment: return 7 << 26; |
1137 | case Attribute::ReturnsTwice: return 1 << 29; |
1138 | case Attribute::UWTable: return 1 << 30; |
1139 | case Attribute::NonLazyBind: return 1U << 31; |
1140 | case Attribute::SanitizeAddress: return 1ULL << 32; |
1141 | case Attribute::MinSize: return 1ULL << 33; |
1142 | case Attribute::NoDuplicate: return 1ULL << 34; |
1143 | case Attribute::StackProtectStrong: return 1ULL << 35; |
1144 | case Attribute::SanitizeThread: return 1ULL << 36; |
1145 | case Attribute::SanitizeMemory: return 1ULL << 37; |
1146 | case Attribute::NoBuiltin: return 1ULL << 38; |
1147 | case Attribute::Returned: return 1ULL << 39; |
1148 | case Attribute::Cold: return 1ULL << 40; |
1149 | case Attribute::Builtin: return 1ULL << 41; |
1150 | case Attribute::OptimizeNone: return 1ULL << 42; |
1151 | case Attribute::InAlloca: return 1ULL << 43; |
1152 | case Attribute::NonNull: return 1ULL << 44; |
1153 | case Attribute::JumpTable: return 1ULL << 45; |
1154 | case Attribute::Convergent: return 1ULL << 46; |
1155 | case Attribute::SafeStack: return 1ULL << 47; |
1156 | case Attribute::NoRecurse: return 1ULL << 48; |
1157 | case Attribute::InaccessibleMemOnly: return 1ULL << 49; |
1158 | case Attribute::InaccessibleMemOrArgMemOnly: return 1ULL << 50; |
1159 | case Attribute::SwiftSelf: return 1ULL << 51; |
1160 | case Attribute::SwiftError: return 1ULL << 52; |
1161 | case Attribute::WriteOnly: return 1ULL << 53; |
1162 | case Attribute::Speculatable: return 1ULL << 54; |
1163 | case Attribute::StrictFP: return 1ULL << 55; |
1164 | case Attribute::SanitizeHWAddress: return 1ULL << 56; |
1165 | case Attribute::NoCfCheck: return 1ULL << 57; |
1166 | case Attribute::OptForFuzzing: return 1ULL << 58; |
1167 | case Attribute::ShadowCallStack: return 1ULL << 59; |
1168 | case Attribute::SpeculativeLoadHardening: |
1169 | return 1ULL << 60; |
1170 | case Attribute::Dereferenceable: |
1171 | llvm_unreachable("dereferenceable attribute not supported in raw format")::llvm::llvm_unreachable_internal("dereferenceable attribute not supported in raw format" , "/build/llvm-toolchain-snapshot-8~svn345461/lib/Bitcode/Reader/BitcodeReader.cpp" , 1171); |
1172 | break; |
1173 | case Attribute::DereferenceableOrNull: |
1174 | llvm_unreachable("dereferenceable_or_null attribute not supported in raw "::llvm::llvm_unreachable_internal("dereferenceable_or_null attribute not supported in raw " "format", "/build/llvm-toolchain-snapshot-8~svn345461/lib/Bitcode/Reader/BitcodeReader.cpp" , 1175) |
1175 | "format")::llvm::llvm_unreachable_internal("dereferenceable_or_null attribute not supported in raw " "format", "/build/llvm-toolchain-snapshot-8~svn345461/lib/Bitcode/Reader/BitcodeReader.cpp" , 1175); |
1176 | break; |
1177 | case Attribute::ArgMemOnly: |
1178 | llvm_unreachable("argmemonly attribute not supported in raw format")::llvm::llvm_unreachable_internal("argmemonly attribute not supported in raw format" , "/build/llvm-toolchain-snapshot-8~svn345461/lib/Bitcode/Reader/BitcodeReader.cpp" , 1178); |
1179 | break; |
1180 | case Attribute::AllocSize: |
1181 | llvm_unreachable("allocsize not supported in raw format")::llvm::llvm_unreachable_internal("allocsize not supported in raw format" , "/build/llvm-toolchain-snapshot-8~svn345461/lib/Bitcode/Reader/BitcodeReader.cpp" , 1181); |
1182 | break; |
1183 | } |
1184 | llvm_unreachable("Unsupported attribute type")::llvm::llvm_unreachable_internal("Unsupported attribute type" , "/build/llvm-toolchain-snapshot-8~svn345461/lib/Bitcode/Reader/BitcodeReader.cpp" , 1184); |
1185 | } |
1186 | |
1187 | static void addRawAttributeValue(AttrBuilder &B, uint64_t Val) { |
1188 | if (!Val) return; |
1189 | |
1190 | for (Attribute::AttrKind I = Attribute::None; I != Attribute::EndAttrKinds; |
1191 | I = Attribute::AttrKind(I + 1)) { |
1192 | if (I == Attribute::Dereferenceable || |
1193 | I == Attribute::DereferenceableOrNull || |
1194 | I == Attribute::ArgMemOnly || |
1195 | I == Attribute::AllocSize) |
1196 | continue; |
1197 | if (uint64_t A = (Val & getRawAttributeMask(I))) { |
1198 | if (I == Attribute::Alignment) |
1199 | B.addAlignmentAttr(1ULL << ((A >> 16) - 1)); |
1200 | else if (I == Attribute::StackAlignment) |
1201 | B.addStackAlignmentAttr(1ULL << ((A >> 26)-1)); |
1202 | else |
1203 | B.addAttribute(I); |
1204 | } |
1205 | } |
1206 | } |
1207 | |
1208 | /// This fills an AttrBuilder object with the LLVM attributes that have |
1209 | /// been decoded from the given integer. This function must stay in sync with |
1210 | /// 'encodeLLVMAttributesForBitcode'. |
1211 | static void decodeLLVMAttributesForBitcode(AttrBuilder &B, |
1212 | uint64_t EncodedAttrs) { |
1213 | // FIXME: Remove in 4.0. |
1214 | |
1215 | // The alignment is stored as a 16-bit raw value from bits 31--16. We shift |
1216 | // the bits above 31 down by 11 bits. |
1217 | unsigned Alignment = (EncodedAttrs & (0xffffULL << 16)) >> 16; |
1218 | 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.\"" , "/build/llvm-toolchain-snapshot-8~svn345461/lib/Bitcode/Reader/BitcodeReader.cpp" , 1219, __PRETTY_FUNCTION__)) |
1219 | "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.\"" , "/build/llvm-toolchain-snapshot-8~svn345461/lib/Bitcode/Reader/BitcodeReader.cpp" , 1219, __PRETTY_FUNCTION__)); |
1220 | |
1221 | if (Alignment) |
1222 | B.addAlignmentAttr(Alignment); |
1223 | addRawAttributeValue(B, ((EncodedAttrs & (0xfffffULL << 32)) >> 11) | |
1224 | (EncodedAttrs & 0xffff)); |
1225 | } |
1226 | |
1227 | Error BitcodeReader::parseAttributeBlock() { |
1228 | if (Stream.EnterSubBlock(bitc::PARAMATTR_BLOCK_ID)) |
1229 | return error("Invalid record"); |
1230 | |
1231 | if (!MAttributes.empty()) |
1232 | return error("Invalid multiple blocks"); |
1233 | |
1234 | SmallVector<uint64_t, 64> Record; |
1235 | |
1236 | SmallVector<AttributeList, 8> Attrs; |
1237 | |
1238 | // Read all the records. |
1239 | while (true) { |
1240 | BitstreamEntry Entry = Stream.advanceSkippingSubblocks(); |
1241 | |
1242 | switch (Entry.Kind) { |
1243 | case BitstreamEntry::SubBlock: // Handled for us already. |
1244 | case BitstreamEntry::Error: |
1245 | return error("Malformed block"); |
1246 | case BitstreamEntry::EndBlock: |
1247 | return Error::success(); |
1248 | case BitstreamEntry::Record: |
1249 | // The interesting case. |
1250 | break; |
1251 | } |
1252 | |
1253 | // Read a record. |
1254 | Record.clear(); |
1255 | switch (Stream.readRecord(Entry.ID, Record)) { |
1256 | default: // Default behavior: ignore. |
1257 | break; |
1258 | case bitc::PARAMATTR_CODE_ENTRY_OLD: // ENTRY: [paramidx0, attr0, ...] |
1259 | // FIXME: Remove in 4.0. |
1260 | if (Record.size() & 1) |
1261 | return error("Invalid record"); |
1262 | |
1263 | for (unsigned i = 0, e = Record.size(); i != e; i += 2) { |
1264 | AttrBuilder B; |
1265 | decodeLLVMAttributesForBitcode(B, Record[i+1]); |
1266 | Attrs.push_back(AttributeList::get(Context, Record[i], B)); |
1267 | } |
1268 | |
1269 | MAttributes.push_back(AttributeList::get(Context, Attrs)); |
1270 | Attrs.clear(); |
1271 | break; |
1272 | case bitc::PARAMATTR_CODE_ENTRY: // ENTRY: [attrgrp0, attrgrp1, ...] |
1273 | for (unsigned i = 0, e = Record.size(); i != e; ++i) |
1274 | Attrs.push_back(MAttributeGroups[Record[i]]); |
1275 | |
1276 | MAttributes.push_back(AttributeList::get(Context, Attrs)); |
1277 | Attrs.clear(); |
1278 | break; |
1279 | } |
1280 | } |
1281 | } |
1282 | |
1283 | // Returns Attribute::None on unrecognized codes. |
1284 | static Attribute::AttrKind getAttrFromCode(uint64_t Code) { |
1285 | switch (Code) { |
1286 | default: |
1287 | return Attribute::None; |
1288 | case bitc::ATTR_KIND_ALIGNMENT: |
1289 | return Attribute::Alignment; |
1290 | case bitc::ATTR_KIND_ALWAYS_INLINE: |
1291 | return Attribute::AlwaysInline; |
1292 | case bitc::ATTR_KIND_ARGMEMONLY: |
1293 | return Attribute::ArgMemOnly; |
1294 | case bitc::ATTR_KIND_BUILTIN: |
1295 | return Attribute::Builtin; |
1296 | case bitc::ATTR_KIND_BY_VAL: |
1297 | return Attribute::ByVal; |
1298 | case bitc::ATTR_KIND_IN_ALLOCA: |
1299 | return Attribute::InAlloca; |
1300 | case bitc::ATTR_KIND_COLD: |
1301 | return Attribute::Cold; |
1302 | case bitc::ATTR_KIND_CONVERGENT: |
1303 | return Attribute::Convergent; |
1304 | case bitc::ATTR_KIND_INACCESSIBLEMEM_ONLY: |
1305 | return Attribute::InaccessibleMemOnly; |
1306 | case bitc::ATTR_KIND_INACCESSIBLEMEM_OR_ARGMEMONLY: |
1307 | return Attribute::InaccessibleMemOrArgMemOnly; |
1308 | case bitc::ATTR_KIND_INLINE_HINT: |
1309 | return Attribute::InlineHint; |
1310 | case bitc::ATTR_KIND_IN_REG: |
1311 | return Attribute::InReg; |
1312 | case bitc::ATTR_KIND_JUMP_TABLE: |
1313 | return Attribute::JumpTable; |
1314 | case bitc::ATTR_KIND_MIN_SIZE: |
1315 | return Attribute::MinSize; |
1316 | case bitc::ATTR_KIND_NAKED: |
1317 | return Attribute::Naked; |
1318 | case bitc::ATTR_KIND_NEST: |
1319 | return Attribute::Nest; |
1320 | case bitc::ATTR_KIND_NO_ALIAS: |
1321 | return Attribute::NoAlias; |
1322 | case bitc::ATTR_KIND_NO_BUILTIN: |
1323 | return Attribute::NoBuiltin; |
1324 | case bitc::ATTR_KIND_NO_CAPTURE: |
1325 | return Attribute::NoCapture; |
1326 | case bitc::ATTR_KIND_NO_DUPLICATE: |
1327 | return Attribute::NoDuplicate; |
1328 | case bitc::ATTR_KIND_NO_IMPLICIT_FLOAT: |
1329 | return Attribute::NoImplicitFloat; |
1330 | case bitc::ATTR_KIND_NO_INLINE: |
1331 | return Attribute::NoInline; |
1332 | case bitc::ATTR_KIND_NO_RECURSE: |
1333 | return Attribute::NoRecurse; |
1334 | case bitc::ATTR_KIND_NON_LAZY_BIND: |
1335 | return Attribute::NonLazyBind; |
1336 | case bitc::ATTR_KIND_NON_NULL: |
1337 | return Attribute::NonNull; |
1338 | case bitc::ATTR_KIND_DEREFERENCEABLE: |
1339 | return Attribute::Dereferenceable; |
1340 | case bitc::ATTR_KIND_DEREFERENCEABLE_OR_NULL: |
1341 | return Attribute::DereferenceableOrNull; |
1342 | case bitc::ATTR_KIND_ALLOC_SIZE: |
1343 | return Attribute::AllocSize; |
1344 | case bitc::ATTR_KIND_NO_RED_ZONE: |
1345 | return Attribute::NoRedZone; |
1346 | case bitc::ATTR_KIND_NO_RETURN: |
1347 | return Attribute::NoReturn; |
1348 | case bitc::ATTR_KIND_NOCF_CHECK: |
1349 | return Attribute::NoCfCheck; |
1350 | case bitc::ATTR_KIND_NO_UNWIND: |
1351 | return Attribute::NoUnwind; |
1352 | case bitc::ATTR_KIND_OPT_FOR_FUZZING: |
1353 | return Attribute::OptForFuzzing; |
1354 | case bitc::ATTR_KIND_OPTIMIZE_FOR_SIZE: |
1355 | return Attribute::OptimizeForSize; |
1356 | case bitc::ATTR_KIND_OPTIMIZE_NONE: |
1357 | return Attribute::OptimizeNone; |
1358 | case bitc::ATTR_KIND_READ_NONE: |
1359 | return Attribute::ReadNone; |
1360 | case bitc::ATTR_KIND_READ_ONLY: |
1361 | return Attribute::ReadOnly; |
1362 | case bitc::ATTR_KIND_RETURNED: |
1363 | return Attribute::Returned; |
1364 | case bitc::ATTR_KIND_RETURNS_TWICE: |
1365 | return Attribute::ReturnsTwice; |
1366 | case bitc::ATTR_KIND_S_EXT: |
1367 | return Attribute::SExt; |
1368 | case bitc::ATTR_KIND_SPECULATABLE: |
1369 | return Attribute::Speculatable; |
1370 | case bitc::ATTR_KIND_STACK_ALIGNMENT: |
1371 | return Attribute::StackAlignment; |
1372 | case bitc::ATTR_KIND_STACK_PROTECT: |
1373 | return Attribute::StackProtect; |
1374 | case bitc::ATTR_KIND_STACK_PROTECT_REQ: |
1375 | return Attribute::StackProtectReq; |
1376 | case bitc::ATTR_KIND_STACK_PROTECT_STRONG: |
1377 | return Attribute::StackProtectStrong; |
1378 | case bitc::ATTR_KIND_SAFESTACK: |
1379 | return Attribute::SafeStack; |
1380 | case bitc::ATTR_KIND_SHADOWCALLSTACK: |
1381 | return Attribute::ShadowCallStack; |
1382 | case bitc::ATTR_KIND_STRICT_FP: |
1383 | return Attribute::StrictFP; |
1384 | case bitc::ATTR_KIND_STRUCT_RET: |
1385 | return Attribute::StructRet; |
1386 | case bitc::ATTR_KIND_SANITIZE_ADDRESS: |
1387 | return Attribute::SanitizeAddress; |
1388 | case bitc::ATTR_KIND_SANITIZE_HWADDRESS: |
1389 | return Attribute::SanitizeHWAddress; |
1390 | case bitc::ATTR_KIND_SANITIZE_THREAD: |
1391 | return Attribute::SanitizeThread; |
1392 | case bitc::ATTR_KIND_SANITIZE_MEMORY: |
1393 | return Attribute::SanitizeMemory; |
1394 | case bitc::ATTR_KIND_SPECULATIVE_LOAD_HARDENING: |
1395 | return Attribute::SpeculativeLoadHardening; |
1396 | case bitc::ATTR_KIND_SWIFT_ERROR: |
1397 | return Attribute::SwiftError; |
1398 | case bitc::ATTR_KIND_SWIFT_SELF: |
1399 | return Attribute::SwiftSelf; |
1400 | case bitc::ATTR_KIND_UW_TABLE: |
1401 | return Attribute::UWTable; |
1402 | case bitc::ATTR_KIND_WRITEONLY: |
1403 | return Attribute::WriteOnly; |
1404 | case bitc::ATTR_KIND_Z_EXT: |
1405 | return Attribute::ZExt; |
1406 | } |
1407 | } |
1408 | |
1409 | Error BitcodeReader::parseAlignmentValue(uint64_t Exponent, |
1410 | unsigned &Alignment) { |
1411 | // Note: Alignment in bitcode files is incremented by 1, so that zero |
1412 | // can be used for default alignment. |
1413 | if (Exponent > Value::MaxAlignmentExponent + 1) |
1414 | return error("Invalid alignment value"); |
1415 | Alignment = (1 << static_cast<unsigned>(Exponent)) >> 1; |
1416 | return Error::success(); |
1417 | } |
1418 | |
1419 | Error BitcodeReader::parseAttrKind(uint64_t Code, Attribute::AttrKind *Kind) { |
1420 | *Kind = getAttrFromCode(Code); |
1421 | if (*Kind == Attribute::None) |
1422 | return error("Unknown attribute kind (" + Twine(Code) + ")"); |
1423 | return Error::success(); |
1424 | } |
1425 | |
1426 | Error BitcodeReader::parseAttributeGroupBlock() { |
1427 | if (Stream.EnterSubBlock(bitc::PARAMATTR_GROUP_BLOCK_ID)) |
1428 | return error("Invalid record"); |
1429 | |
1430 | if (!MAttributeGroups.empty()) |
1431 | return error("Invalid multiple blocks"); |
1432 | |
1433 | SmallVector<uint64_t, 64> Record; |
1434 | |
1435 | // Read all the records. |
1436 | while (true) { |
1437 | BitstreamEntry Entry = Stream.advanceSkippingSubblocks(); |
1438 | |
1439 | switch (Entry.Kind) { |
1440 | case BitstreamEntry::SubBlock: // Handled for us already. |
1441 | case BitstreamEntry::Error: |
1442 | return error("Malformed block"); |
1443 | case BitstreamEntry::EndBlock: |
1444 | return Error::success(); |
1445 | case BitstreamEntry::Record: |
1446 | // The interesting case. |
1447 | break; |
1448 | } |
1449 | |
1450 | // Read a record. |
1451 | Record.clear(); |
1452 | switch (Stream.readRecord(Entry.ID, Record)) { |
1453 | default: // Default behavior: ignore. |
1454 | break; |
1455 | case bitc::PARAMATTR_GRP_CODE_ENTRY: { // ENTRY: [grpid, idx, a0, a1, ...] |
1456 | if (Record.size() < 3) |
1457 | return error("Invalid record"); |
1458 | |
1459 | uint64_t GrpID = Record[0]; |
1460 | uint64_t Idx = Record[1]; // Index of the object this attribute refers to. |
1461 | |
1462 | AttrBuilder B; |
1463 | for (unsigned i = 2, e = Record.size(); i != e; ++i) { |
1464 | if (Record[i] == 0) { // Enum attribute |
1465 | Attribute::AttrKind Kind; |
1466 | if (Error Err = parseAttrKind(Record[++i], &Kind)) |
1467 | return Err; |
1468 | |
1469 | B.addAttribute(Kind); |
1470 | } else if (Record[i] == 1) { // Integer attribute |
1471 | Attribute::AttrKind Kind; |
1472 | if (Error Err = parseAttrKind(Record[++i], &Kind)) |
1473 | return Err; |
1474 | if (Kind == Attribute::Alignment) |
1475 | B.addAlignmentAttr(Record[++i]); |
1476 | else if (Kind == Attribute::StackAlignment) |
1477 | B.addStackAlignmentAttr(Record[++i]); |
1478 | else if (Kind == Attribute::Dereferenceable) |
1479 | B.addDereferenceableAttr(Record[++i]); |
1480 | else if (Kind == Attribute::DereferenceableOrNull) |
1481 | B.addDereferenceableOrNullAttr(Record[++i]); |
1482 | else if (Kind == Attribute::AllocSize) |
1483 | B.addAllocSizeAttrFromRawRepr(Record[++i]); |
1484 | } else { // String attribute |
1485 | 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\"" , "/build/llvm-toolchain-snapshot-8~svn345461/lib/Bitcode/Reader/BitcodeReader.cpp" , 1486, __PRETTY_FUNCTION__)) |
1486 | "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\"" , "/build/llvm-toolchain-snapshot-8~svn345461/lib/Bitcode/Reader/BitcodeReader.cpp" , 1486, __PRETTY_FUNCTION__)); |
1487 | bool HasValue = (Record[i++] == 4); |
1488 | SmallString<64> KindStr; |
1489 | SmallString<64> ValStr; |
1490 | |
1491 | while (Record[i] != 0 && i != e) |
1492 | KindStr += Record[i++]; |
1493 | 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\"" , "/build/llvm-toolchain-snapshot-8~svn345461/lib/Bitcode/Reader/BitcodeReader.cpp" , 1493, __PRETTY_FUNCTION__)); |
1494 | |
1495 | if (HasValue) { |
1496 | // Has a value associated with it. |
1497 | ++i; // Skip the '0' that terminates the "kind" string. |
1498 | while (Record[i] != 0 && i != e) |
1499 | ValStr += Record[i++]; |
1500 | 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\"" , "/build/llvm-toolchain-snapshot-8~svn345461/lib/Bitcode/Reader/BitcodeReader.cpp" , 1500, __PRETTY_FUNCTION__)); |
1501 | } |
1502 | |
1503 | B.addAttribute(KindStr.str(), ValStr.str()); |
1504 | } |
1505 | } |
1506 | |
1507 | MAttributeGroups[GrpID] = AttributeList::get(Context, Idx, B); |
1508 | break; |
1509 | } |
1510 | } |
1511 | } |
1512 | } |
1513 | |
1514 | Error BitcodeReader::parseTypeTable() { |
1515 | if (Stream.EnterSubBlock(bitc::TYPE_BLOCK_ID_NEW)) |
1516 | return error("Invalid record"); |
1517 | |
1518 | return parseTypeTableBody(); |
1519 | } |
1520 | |
1521 | Error BitcodeReader::parseTypeTableBody() { |
1522 | if (!TypeList.empty()) |
1523 | return error("Invalid multiple blocks"); |
1524 | |
1525 | SmallVector<uint64_t, 64> Record; |
1526 | unsigned NumRecords = 0; |
1527 | |
1528 | SmallString<64> TypeName; |
1529 | |
1530 | // Read all the records for this type table. |
1531 | while (true) { |
1532 | BitstreamEntry Entry = Stream.advanceSkippingSubblocks(); |
1533 | |
1534 | switch (Entry.Kind) { |
1535 | case BitstreamEntry::SubBlock: // Handled for us already. |
1536 | case BitstreamEntry::Error: |
1537 | return error("Malformed block"); |
1538 | case BitstreamEntry::EndBlock: |
1539 | if (NumRecords != TypeList.size()) |
1540 | return error("Malformed block"); |
1541 | return Error::success(); |
1542 | case BitstreamEntry::Record: |
1543 | // The interesting case. |
1544 | break; |
1545 | } |
1546 | |
1547 | // Read a record. |
1548 | Record.clear(); |
1549 | Type *ResultTy = nullptr; |
1550 | switch (Stream.readRecord(Entry.ID, Record)) { |
1551 | default: |
1552 | return error("Invalid value"); |
1553 | case bitc::TYPE_CODE_NUMENTRY: // TYPE_CODE_NUMENTRY: [numentries] |
1554 | // TYPE_CODE_NUMENTRY contains a count of the number of types in the |
1555 | // type list. This allows us to reserve space. |
1556 | if (Record.size() < 1) |
1557 | return error("Invalid record"); |
1558 | TypeList.resize(Record[0]); |
1559 | continue; |
1560 | case bitc::TYPE_CODE_VOID: // VOID |
1561 | ResultTy = Type::getVoidTy(Context); |
1562 | break; |
1563 | case bitc::TYPE_CODE_HALF: // HALF |
1564 | ResultTy = Type::getHalfTy(Context); |
1565 | break; |
1566 | case bitc::TYPE_CODE_FLOAT: // FLOAT |
1567 | ResultTy = Type::getFloatTy(Context); |
1568 | break; |
1569 | case bitc::TYPE_CODE_DOUBLE: // DOUBLE |
1570 | ResultTy = Type::getDoubleTy(Context); |
1571 | break; |
1572 | case bitc::TYPE_CODE_X86_FP80: // X86_FP80 |
1573 | ResultTy = Type::getX86_FP80Ty(Context); |
1574 | break; |
1575 | case bitc::TYPE_CODE_FP128: // FP128 |
1576 | ResultTy = Type::getFP128Ty(Context); |
1577 | break; |
1578 | case bitc::TYPE_CODE_PPC_FP128: // PPC_FP128 |
1579 | ResultTy = Type::getPPC_FP128Ty(Context); |
1580 | break; |
1581 | case bitc::TYPE_CODE_LABEL: // LABEL |
1582 | ResultTy = Type::getLabelTy(Context); |
1583 | break; |
1584 | case bitc::TYPE_CODE_METADATA: // METADATA |
1585 | ResultTy = Type::getMetadataTy(Context); |
1586 | break; |
1587 | case bitc::TYPE_CODE_X86_MMX: // X86_MMX |
1588 | ResultTy = Type::getX86_MMXTy(Context); |
1589 | break; |
1590 | case bitc::TYPE_CODE_TOKEN: // TOKEN |
1591 | ResultTy = Type::getTokenTy(Context); |
1592 | break; |
1593 | case bitc::TYPE_CODE_INTEGER: { // INTEGER: [width] |
1594 | if (Record.size() < 1) |
1595 | return error("Invalid record"); |
1596 | |
1597 | uint64_t NumBits = Record[0]; |
1598 | if (NumBits < IntegerType::MIN_INT_BITS || |
1599 | NumBits > IntegerType::MAX_INT_BITS) |
1600 | return error("Bitwidth for integer type out of range"); |
1601 | ResultTy = IntegerType::get(Context, NumBits); |
1602 | break; |
1603 | } |
1604 | case bitc::TYPE_CODE_POINTER: { // POINTER: [pointee type] or |
1605 | // [pointee type, address space] |
1606 | if (Record.size() < 1) |
1607 | return error("Invalid record"); |
1608 | unsigned AddressSpace = 0; |
1609 | if (Record.size() == 2) |
1610 | AddressSpace = Record[1]; |
1611 | ResultTy = getTypeByID(Record[0]); |
1612 | if (!ResultTy || |
1613 | !PointerType::isValidElementType(ResultTy)) |
1614 | return error("Invalid type"); |
1615 | ResultTy = PointerType::get(ResultTy, AddressSpace); |
1616 | break; |
1617 | } |
1618 | case bitc::TYPE_CODE_FUNCTION_OLD: { |
1619 | // FIXME: attrid is dead, remove it in LLVM 4.0 |
1620 | // FUNCTION: [vararg, attrid, retty, paramty x N] |
1621 | if (Record.size() < 3) |
1622 | return error("Invalid record"); |
1623 | SmallVector<Type*, 8> ArgTys; |
1624 | for (unsigned i = 3, e = Record.size(); i != e; ++i) { |
1625 | if (Type *T = getTypeByID(Record[i])) |
1626 | ArgTys.push_back(T); |
1627 | else |
1628 | break; |
1629 | } |
1630 | |
1631 | ResultTy = getTypeByID(Record[2]); |
1632 | if (!ResultTy || ArgTys.size() < Record.size()-3) |
1633 | return error("Invalid type"); |
1634 | |
1635 | ResultTy = FunctionType::get(ResultTy, ArgTys, Record[0]); |
1636 | break; |
1637 | } |
1638 | case bitc::TYPE_CODE_FUNCTION: { |
1639 | // FUNCTION: [vararg, retty, paramty x N] |
1640 | if (Record.size() < 2) |
1641 | return error("Invalid record"); |
1642 | SmallVector<Type*, 8> ArgTys; |
1643 | for (unsigned i = 2, e = Record.size(); i != e; ++i) { |
1644 | if (Type *T = getTypeByID(Record[i])) { |
1645 | if (!FunctionType::isValidArgumentType(T)) |
1646 | return error("Invalid function argument type"); |
1647 | ArgTys.push_back(T); |
1648 | } |
1649 | else |
1650 | break; |
1651 | } |
1652 | |
1653 | ResultTy = getTypeByID(Record[1]); |
1654 | if (!ResultTy || ArgTys.size() < Record.size()-2) |
1655 | return error("Invalid type"); |
1656 | |
1657 | ResultTy = FunctionType::get(ResultTy, ArgTys, Record[0]); |
1658 | break; |
1659 | } |
1660 | case bitc::TYPE_CODE_STRUCT_ANON: { // STRUCT: [ispacked, eltty x N] |
1661 | if (Record.size() < 1) |
1662 | return error("Invalid record"); |
1663 | SmallVector<Type*, 8> EltTys; |
1664 | for (unsigned i = 1, e = Record.size(); i != e; ++i) { |
1665 | if (Type *T = getTypeByID(Record[i])) |
1666 | EltTys.push_back(T); |
1667 | else |
1668 | break; |
1669 | } |
1670 | if (EltTys.size() != Record.size()-1) |
1671 | return error("Invalid type"); |
1672 | ResultTy = StructType::get(Context, EltTys, Record[0]); |
1673 | break; |
1674 | } |
1675 | case bitc::TYPE_CODE_STRUCT_NAME: // STRUCT_NAME: [strchr x N] |
1676 | if (convertToString(Record, 0, TypeName)) |
1677 | return error("Invalid record"); |
1678 | continue; |
1679 | |
1680 | case bitc::TYPE_CODE_STRUCT_NAMED: { // STRUCT: [ispacked, eltty x N] |
1681 | if (Record.size() < 1) |
1682 | return error("Invalid record"); |
1683 | |
1684 | if (NumRecords >= TypeList.size()) |
1685 | return error("Invalid TYPE table"); |
1686 | |
1687 | // Check to see if this was forward referenced, if so fill in the temp. |
1688 | StructType *Res = cast_or_null<StructType>(TypeList[NumRecords]); |
1689 | if (Res) { |
1690 | Res->setName(TypeName); |
1691 | TypeList[NumRecords] = nullptr; |
1692 | } else // Otherwise, create a new struct. |
1693 | Res = createIdentifiedStructType(Context, TypeName); |
1694 | TypeName.clear(); |
1695 | |
1696 | SmallVector<Type*, 8> EltTys; |
1697 | for (unsigned i = 1, e = Record.size(); i != e; ++i) { |
1698 | if (Type *T = getTypeByID(Record[i])) |
1699 | EltTys.push_back(T); |
1700 | else |
1701 | break; |
1702 | } |
1703 | if (EltTys.size() != Record.size()-1) |
1704 | return error("Invalid record"); |
1705 | Res->setBody(EltTys, Record[0]); |
1706 | ResultTy = Res; |
1707 | break; |
1708 | } |
1709 | case bitc::TYPE_CODE_OPAQUE: { // OPAQUE: [] |
1710 | if (Record.size() != 1) |
1711 | return error("Invalid record"); |
1712 | |
1713 | if (NumRecords >= TypeList.size()) |
1714 | return error("Invalid TYPE table"); |
1715 | |
1716 | // Check to see if this was forward referenced, if so fill in the temp. |
1717 | StructType *Res = cast_or_null<StructType>(TypeList[NumRecords]); |
1718 | if (Res) { |
1719 | Res->setName(TypeName); |
1720 | TypeList[NumRecords] = nullptr; |
1721 | } else // Otherwise, create a new struct with no body. |
1722 | Res = createIdentifiedStructType(Context, TypeName); |
1723 | TypeName.clear(); |
1724 | ResultTy = Res; |
1725 | break; |
1726 | } |
1727 | case bitc::TYPE_CODE_ARRAY: // ARRAY: [numelts, eltty] |
1728 | if (Record.size() < 2) |
1729 | return error("Invalid record"); |
1730 | ResultTy = getTypeByID(Record[1]); |
1731 | if (!ResultTy || !ArrayType::isValidElementType(ResultTy)) |
1732 | return error("Invalid type"); |
1733 | ResultTy = ArrayType::get(ResultTy, Record[0]); |
1734 | break; |
1735 | case bitc::TYPE_CODE_VECTOR: // VECTOR: [numelts, eltty] |
1736 | if (Record.size() < 2) |
1737 | return error("Invalid record"); |
1738 | if (Record[0] == 0) |
1739 | return error("Invalid vector length"); |
1740 | ResultTy = getTypeByID(Record[1]); |
1741 | if (!ResultTy || !StructType::isValidElementType(ResultTy)) |
1742 | return error("Invalid type"); |
1743 | ResultTy = VectorType::get(ResultTy, Record[0]); |
1744 | break; |
1745 | } |
1746 | |
1747 | if (NumRecords >= TypeList.size()) |
1748 | return error("Invalid TYPE table"); |
1749 | if (TypeList[NumRecords]) |
1750 | return error( |
1751 | "Invalid TYPE table: Only named structs can be forward referenced"); |
1752 | 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?\"" , "/build/llvm-toolchain-snapshot-8~svn345461/lib/Bitcode/Reader/BitcodeReader.cpp" , 1752, __PRETTY_FUNCTION__)); |
1753 | TypeList[NumRecords++] = ResultTy; |
1754 | } |
1755 | } |
1756 | |
1757 | Error BitcodeReader::parseOperandBundleTags() { |
1758 | if (Stream.EnterSubBlock(bitc::OPERAND_BUNDLE_TAGS_BLOCK_ID)) |
1759 | return error("Invalid record"); |
1760 | |
1761 | if (!BundleTags.empty()) |
1762 | return error("Invalid multiple blocks"); |
1763 | |
1764 | SmallVector<uint64_t, 64> Record; |
1765 | |
1766 | while (true) { |
1767 | BitstreamEntry Entry = Stream.advanceSkippingSubblocks(); |
1768 | |
1769 | switch (Entry.Kind) { |
1770 | case BitstreamEntry::SubBlock: // Handled for us already. |
1771 | case BitstreamEntry::Error: |
1772 | return error("Malformed block"); |
1773 | case BitstreamEntry::EndBlock: |
1774 | return Error::success(); |
1775 | case BitstreamEntry::Record: |
1776 | // The interesting case. |
1777 | break; |
1778 | } |
1779 | |
1780 | // Tags are implicitly mapped to integers by their order. |
1781 | |
1782 | if (Stream.readRecord(Entry.ID, Record) != bitc::OPERAND_BUNDLE_TAG) |
1783 | return error("Invalid record"); |
1784 | |
1785 | // OPERAND_BUNDLE_TAG: [strchr x N] |
1786 | BundleTags.emplace_back(); |
1787 | if (convertToString(Record, 0, BundleTags.back())) |
1788 | return error("Invalid record"); |
1789 | Record.clear(); |
1790 | } |
1791 | } |
1792 | |
1793 | Error BitcodeReader::parseSyncScopeNames() { |
1794 | if (Stream.EnterSubBlock(bitc::SYNC_SCOPE_NAMES_BLOCK_ID)) |
1795 | return error("Invalid record"); |
1796 | |
1797 | if (!SSIDs.empty()) |
1798 | return error("Invalid multiple synchronization scope names blocks"); |
1799 | |
1800 | SmallVector<uint64_t, 64> Record; |
1801 | while (true) { |
1802 | BitstreamEntry Entry = Stream.advanceSkippingSubblocks(); |
1803 | switch (Entry.Kind) { |
1804 | case BitstreamEntry::SubBlock: // Handled for us already. |
1805 | case BitstreamEntry::Error: |
1806 | return error("Malformed block"); |
1807 | case BitstreamEntry::EndBlock: |
1808 | if (SSIDs.empty()) |
1809 | return error("Invalid empty synchronization scope names block"); |
1810 | return Error::success(); |
1811 | case BitstreamEntry::Record: |
1812 | // The interesting case. |
1813 | break; |
1814 | } |
1815 | |
1816 | // Synchronization scope names are implicitly mapped to synchronization |
1817 | // scope IDs by their order. |
1818 | |
1819 | if (Stream.readRecord(Entry.ID, Record) != bitc::SYNC_SCOPE_NAME) |
1820 | return error("Invalid record"); |
1821 | |
1822 | SmallString<16> SSN; |
1823 | if (convertToString(Record, 0, SSN)) |
1824 | return error("Invalid record"); |
1825 | |
1826 | SSIDs.push_back(Context.getOrInsertSyncScopeID(SSN)); |
1827 | Record.clear(); |
1828 | } |
1829 | } |
1830 | |
1831 | /// Associate a value with its name from the given index in the provided record. |
1832 | Expected<Value *> BitcodeReader::recordValue(SmallVectorImpl<uint64_t> &Record, |
1833 | unsigned NameIndex, Triple &TT) { |
1834 | SmallString<128> ValueName; |
1835 | if (convertToString(Record, NameIndex, ValueName)) |
1836 | return error("Invalid record"); |
1837 | unsigned ValueID = Record[0]; |
1838 | if (ValueID >= ValueList.size() || !ValueList[ValueID]) |
1839 | return error("Invalid record"); |
1840 | Value *V = ValueList[ValueID]; |
1841 | |
1842 | StringRef NameStr(ValueName.data(), ValueName.size()); |
1843 | if (NameStr.find_first_of(0) != StringRef::npos) |
1844 | return error("Invalid value name"); |
1845 | V->setName(NameStr); |
1846 | auto *GO = dyn_cast<GlobalObject>(V); |
1847 | if (GO) { |
1848 | if (GO->getComdat() == reinterpret_cast<Comdat *>(1)) { |
1849 | if (TT.supportsCOMDAT()) |
1850 | GO->setComdat(TheModule->getOrInsertComdat(V->getName())); |
1851 | else |
1852 | GO->setComdat(nullptr); |
1853 | } |
1854 | } |
1855 | return V; |
1856 | } |
1857 | |
1858 | /// Helper to note and return the current location, and jump to the given |
1859 | /// offset. |
1860 | static uint64_t jumpToValueSymbolTable(uint64_t Offset, |
1861 | BitstreamCursor &Stream) { |
1862 | // Save the current parsing location so we can jump back at the end |
1863 | // of the VST read. |
1864 | uint64_t CurrentBit = Stream.GetCurrentBitNo(); |
1865 | Stream.JumpToBit(Offset * 32); |
1866 | #ifndef NDEBUG |
1867 | // Do some checking if we are in debug mode. |
1868 | BitstreamEntry Entry = Stream.advance(); |
1869 | assert(Entry.Kind == BitstreamEntry::SubBlock)((Entry.Kind == BitstreamEntry::SubBlock) ? static_cast<void > (0) : __assert_fail ("Entry.Kind == BitstreamEntry::SubBlock" , "/build/llvm-toolchain-snapshot-8~svn345461/lib/Bitcode/Reader/BitcodeReader.cpp" , 1869, __PRETTY_FUNCTION__)); |
1870 | 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" , "/build/llvm-toolchain-snapshot-8~svn345461/lib/Bitcode/Reader/BitcodeReader.cpp" , 1870, __PRETTY_FUNCTION__)); |
1871 | #else |
1872 | // In NDEBUG mode ignore the output so we don't get an unused variable |
1873 | // warning. |
1874 | Stream.advance(); |
1875 | #endif |
1876 | return CurrentBit; |
1877 | } |
1878 | |
1879 | void BitcodeReader::setDeferredFunctionInfo(unsigned FuncBitcodeOffsetDelta, |
1880 | Function *F, |
1881 | ArrayRef<uint64_t> Record) { |
1882 | // Note that we subtract 1 here because the offset is relative to one word |
1883 | // before the start of the identification or module block, which was |
1884 | // historically always the start of the regular bitcode header. |
1885 | uint64_t FuncWordOffset = Record[1] - 1; |
1886 | uint64_t FuncBitOffset = FuncWordOffset * 32; |
1887 | DeferredFunctionInfo[F] = FuncBitOffset + FuncBitcodeOffsetDelta; |
1888 | // Set the LastFunctionBlockBit to point to the last function block. |
1889 | // Later when parsing is resumed after function materialization, |
1890 | // we can simply skip that last function block. |
1891 | if (FuncBitOffset > LastFunctionBlockBit) |
1892 | LastFunctionBlockBit = FuncBitOffset; |
1893 | } |
1894 | |
1895 | /// Read a new-style GlobalValue symbol table. |
1896 | Error BitcodeReader::parseGlobalValueSymbolTable() { |
1897 | unsigned FuncBitcodeOffsetDelta = |
1898 | Stream.getAbbrevIDWidth() + bitc::BlockIDWidth; |
1899 | |
1900 | if (Stream.EnterSubBlock(bitc::VALUE_SYMTAB_BLOCK_ID)) |
1901 | return error("Invalid record"); |
1902 | |
1903 | SmallVector<uint64_t, 64> Record; |
1904 | while (true) { |
1905 | BitstreamEntry Entry = Stream.advanceSkippingSubblocks(); |
1906 | |
1907 | switch (Entry.Kind) { |
1908 | case BitstreamEntry::SubBlock: |
1909 | case BitstreamEntry::Error: |
1910 | return error("Malformed block"); |
1911 | case BitstreamEntry::EndBlock: |
1912 | return Error::success(); |
1913 | case BitstreamEntry::Record: |
1914 | break; |
1915 | } |
1916 | |
1917 | Record.clear(); |
1918 | switch (Stream.readRecord(Entry.ID, Record)) { |
1919 | case bitc::VST_CODE_FNENTRY: // [valueid, offset] |
1920 | setDeferredFunctionInfo(FuncBitcodeOffsetDelta, |
1921 | cast<Function>(ValueList[Record[0]]), Record); |
1922 | break; |
1923 | } |
1924 | } |
1925 | } |
1926 | |
1927 | /// Parse the value symbol table at either the current parsing location or |
1928 | /// at the given bit offset if provided. |
1929 | Error BitcodeReader::parseValueSymbolTable(uint64_t Offset) { |
1930 | uint64_t CurrentBit; |
1931 | // Pass in the Offset to distinguish between calling for the module-level |
1932 | // VST (where we want to jump to the VST offset) and the function-level |
1933 | // VST (where we don't). |
1934 | if (Offset > 0) { |
1935 | CurrentBit = jumpToValueSymbolTable(Offset, Stream); |
1936 | // If this module uses a string table, read this as a module-level VST. |
1937 | if (UseStrtab) { |
1938 | if (Error Err = parseGlobalValueSymbolTable()) |
1939 | return Err; |
1940 | Stream.JumpToBit(CurrentBit); |
1941 | return Error::success(); |
1942 | } |
1943 | // Otherwise, the VST will be in a similar format to a function-level VST, |
1944 | // and will contain symbol names. |
1945 | } |
1946 | |
1947 | // Compute the delta between the bitcode indices in the VST (the word offset |
1948 | // to the word-aligned ENTER_SUBBLOCK for the function block, and that |
1949 | // expected by the lazy reader. The reader's EnterSubBlock expects to have |
1950 | // already read the ENTER_SUBBLOCK code (size getAbbrevIDWidth) and BlockID |
1951 | // (size BlockIDWidth). Note that we access the stream's AbbrevID width here |
1952 | // just before entering the VST subblock because: 1) the EnterSubBlock |
1953 | // changes the AbbrevID width; 2) the VST block is nested within the same |
1954 | // outer MODULE_BLOCK as the FUNCTION_BLOCKs and therefore have the same |
1955 | // AbbrevID width before calling EnterSubBlock; and 3) when we want to |
1956 | // jump to the FUNCTION_BLOCK using this offset later, we don't want |
1957 | // to rely on the stream's AbbrevID width being that of the MODULE_BLOCK. |
1958 | unsigned FuncBitcodeOffsetDelta = |
1959 | Stream.getAbbrevIDWidth() + bitc::BlockIDWidth; |
1960 | |
1961 | if (Stream.EnterSubBlock(bitc::VALUE_SYMTAB_BLOCK_ID)) |
1962 | return error("Invalid record"); |
1963 | |
1964 | SmallVector<uint64_t, 64> Record; |
1965 | |
1966 | Triple TT(TheModule->getTargetTriple()); |
1967 | |
1968 | // Read all the records for this value table. |
1969 | SmallString<128> ValueName; |
1970 | |
1971 | while (true) { |
1972 | BitstreamEntry Entry = Stream.advanceSkippingSubblocks(); |
1973 | |
1974 | switch (Entry.Kind) { |
1975 | case BitstreamEntry::SubBlock: // Handled for us already. |
1976 | case BitstreamEntry::Error: |
1977 | return error("Malformed block"); |
1978 | case BitstreamEntry::EndBlock: |
1979 | if (Offset > 0) |
1980 | Stream.JumpToBit(CurrentBit); |
1981 | return Error::success(); |
1982 | case BitstreamEntry::Record: |
1983 | // The interesting case. |
1984 | break; |
1985 | } |
1986 | |
1987 | // Read a record. |
1988 | Record.clear(); |
1989 | switch (Stream.readRecord(Entry.ID, Record)) { |
1990 | default: // Default behavior: unknown type. |
1991 | break; |
1992 | case bitc::VST_CODE_ENTRY: { // VST_CODE_ENTRY: [valueid, namechar x N] |
1993 | Expected<Value *> ValOrErr = recordValue(Record, 1, TT); |
1994 | if (Error Err = ValOrErr.takeError()) |
1995 | return Err; |
1996 | ValOrErr.get(); |
1997 | break; |
1998 | } |
1999 | case bitc::VST_CODE_FNENTRY: { |
2000 | // VST_CODE_FNENTRY: [valueid, offset, namechar x N] |
2001 | Expected<Value *> ValOrErr = recordValue(Record, 2, TT); |
2002 | if (Error Err = ValOrErr.takeError()) |
2003 | return Err; |
2004 | Value *V = ValOrErr.get(); |
2005 | |
2006 | // Ignore function offsets emitted for aliases of functions in older |
2007 | // versions of LLVM. |
2008 | if (auto *F = dyn_cast<Function>(V)) |
2009 | setDeferredFunctionInfo(FuncBitcodeOffsetDelta, F, Record); |
2010 | break; |
2011 | } |
2012 | case bitc::VST_CODE_BBENTRY: { |
2013 | if (convertToString(Record, 1, ValueName)) |
2014 | return error("Invalid record"); |
2015 | BasicBlock *BB = getBasicBlock(Record[0]); |
2016 | if (!BB) |
2017 | return error("Invalid record"); |
2018 | |
2019 | BB->setName(StringRef(ValueName.data(), ValueName.size())); |
2020 | ValueName.clear(); |
2021 | break; |
2022 | } |
2023 | } |
2024 | } |
2025 | } |
2026 | |
2027 | /// Decode a signed value stored with the sign bit in the LSB for dense VBR |
2028 | /// encoding. |
2029 | uint64_t BitcodeReader::decodeSignRotatedValue(uint64_t V) { |
2030 | if ((V & 1) == 0) |
2031 | return V >> 1; |
2032 | if (V != 1) |
2033 | return -(V >> 1); |
2034 | // There is no such thing as -0 with integers. "-0" really means MININT. |
2035 | return 1ULL << 63; |
2036 | } |
2037 | |
2038 | /// Resolve all of the initializers for global values and aliases that we can. |
2039 | Error BitcodeReader::resolveGlobalAndIndirectSymbolInits() { |
2040 | std::vector<std::pair<GlobalVariable *, unsigned>> GlobalInitWorklist; |
2041 | std::vector<std::pair<GlobalIndirectSymbol *, unsigned>> |
2042 | IndirectSymbolInitWorklist; |
2043 | std::vector<std::pair<Function *, unsigned>> FunctionPrefixWorklist; |
2044 | std::vector<std::pair<Function *, unsigned>> FunctionPrologueWorklist; |
2045 | std::vector<std::pair<Function *, unsigned>> FunctionPersonalityFnWorklist; |
2046 | |
2047 | GlobalInitWorklist.swap(GlobalInits); |
2048 | IndirectSymbolInitWorklist.swap(IndirectSymbolInits); |
2049 | FunctionPrefixWorklist.swap(FunctionPrefixes); |
2050 | FunctionPrologueWorklist.swap(FunctionPrologues); |
2051 | FunctionPersonalityFnWorklist.swap(FunctionPersonalityFns); |
2052 | |
2053 | while (!GlobalInitWorklist.empty()) { |
2054 | unsigned ValID = GlobalInitWorklist.back().second; |
2055 | if (ValID >= ValueList.size()) { |
2056 | // Not ready to resolve this yet, it requires something later in the file. |
2057 | GlobalInits.push_back(GlobalInitWorklist.back()); |
2058 | } else { |
2059 | if (Constant *C = dyn_cast_or_null<Constant>(ValueList[ValID])) |
2060 | GlobalInitWorklist.back().first->setInitializer(C); |
2061 | else |
2062 | return error("Expected a constant"); |
2063 | } |
2064 | GlobalInitWorklist.pop_back(); |
2065 | } |
2066 | |
2067 | while (!IndirectSymbolInitWorklist.empty()) { |
2068 | unsigned ValID = IndirectSymbolInitWorklist.back().second; |
2069 | if (ValID >= ValueList.size()) { |
2070 | IndirectSymbolInits.push_back(IndirectSymbolInitWorklist.back()); |
2071 | } else { |
2072 | Constant *C = dyn_cast_or_null<Constant>(ValueList[ValID]); |
2073 | if (!C) |
2074 | return error("Expected a constant"); |
2075 | GlobalIndirectSymbol *GIS = IndirectSymbolInitWorklist.back().first; |
2076 | if (isa<GlobalAlias>(GIS) && C->getType() != GIS->getType()) |
2077 | return error("Alias and aliasee types don't match"); |
2078 | GIS->setIndirectSymbol(C); |
2079 | } |
2080 | IndirectSymbolInitWorklist.pop_back(); |
2081 | } |
2082 | |
2083 | while (!FunctionPrefixWorklist.empty()) { |
2084 | unsigned ValID = FunctionPrefixWorklist.back().second; |
2085 | if (ValID >= ValueList.size()) { |
2086 | FunctionPrefixes.push_back(FunctionPrefixWorklist.back()); |
2087 | } else { |
2088 | if (Constant *C = dyn_cast_or_null<Constant>(ValueList[ValID])) |
2089 | FunctionPrefixWorklist.back().first->setPrefixData(C); |
2090 | else |
2091 | return error("Expected a constant"); |
2092 | } |
2093 | FunctionPrefixWorklist.pop_back(); |
2094 | } |
2095 | |
2096 | while (!FunctionPrologueWorklist.empty()) { |
2097 | unsigned ValID = FunctionPrologueWorklist.back().second; |
2098 | if (ValID >= ValueList.size()) { |
2099 | FunctionPrologues.push_back(FunctionPrologueWorklist.back()); |
2100 | } else { |
2101 | if (Constant *C = dyn_cast_or_null<Constant>(ValueList[ValID])) |
2102 | FunctionPrologueWorklist.back().first->setPrologueData(C); |
2103 | else |
2104 | return error("Expected a constant"); |
2105 | } |
2106 | FunctionPrologueWorklist.pop_back(); |
2107 | } |
2108 | |
2109 | while (!FunctionPersonalityFnWorklist.empty()) { |
2110 | unsigned ValID = FunctionPersonalityFnWorklist.back().second; |
2111 | if (ValID >= ValueList.size()) { |
2112 | FunctionPersonalityFns.push_back(FunctionPersonalityFnWorklist.back()); |
2113 | } else { |
2114 | if (Constant *C = dyn_cast_or_null<Constant>(ValueList[ValID])) |
2115 | FunctionPersonalityFnWorklist.back().first->setPersonalityFn(C); |
2116 | else |
2117 | return error("Expected a constant"); |
2118 | } |
2119 | FunctionPersonalityFnWorklist.pop_back(); |
2120 | } |
2121 | |
2122 | return Error::success(); |
2123 | } |
2124 | |
2125 | static APInt readWideAPInt(ArrayRef<uint64_t> Vals, unsigned TypeBits) { |
2126 | SmallVector<uint64_t, 8> Words(Vals.size()); |
2127 | transform(Vals, Words.begin(), |
2128 | BitcodeReader::decodeSignRotatedValue); |
2129 | |
2130 | return APInt(TypeBits, Words); |
2131 | } |
2132 | |
2133 | Error BitcodeReader::parseConstants() { |
2134 | if (Stream.EnterSubBlock(bitc::CONSTANTS_BLOCK_ID)) |
2135 | return error("Invalid record"); |
2136 | |
2137 | SmallVector<uint64_t, 64> Record; |
2138 | |
2139 | // Read all the records for this value table. |
2140 | Type *CurTy = Type::getInt32Ty(Context); |
2141 | unsigned NextCstNo = ValueList.size(); |
2142 | |
2143 | while (true) { |
2144 | BitstreamEntry Entry = Stream.advanceSkippingSubblocks(); |
2145 | |
2146 | switch (Entry.Kind) { |
2147 | case BitstreamEntry::SubBlock: // Handled for us already. |
2148 | case BitstreamEntry::Error: |
2149 | return error("Malformed block"); |
2150 | case BitstreamEntry::EndBlock: |
2151 | if (NextCstNo != ValueList.size()) |
2152 | return error("Invalid constant reference"); |
2153 | |
2154 | // Once all the constants have been read, go through and resolve forward |
2155 | // references. |
2156 | ValueList.resolveConstantForwardRefs(); |
2157 | return Error::success(); |
2158 | case BitstreamEntry::Record: |
2159 | // The interesting case. |
2160 | break; |
2161 | } |
2162 | |
2163 | // Read a record. |
2164 | Record.clear(); |
2165 | Type *VoidType = Type::getVoidTy(Context); |
2166 | Value *V = nullptr; |
2167 | unsigned BitCode = Stream.readRecord(Entry.ID, Record); |
2168 | switch (BitCode) { |
2169 | default: // Default behavior: unknown constant |
2170 | case bitc::CST_CODE_UNDEF: // UNDEF |
2171 | V = UndefValue::get(CurTy); |
2172 | break; |
2173 | case bitc::CST_CODE_SETTYPE: // SETTYPE: [typeid] |
2174 | if (Record.empty()) |
2175 | return error("Invalid record"); |
2176 | if (Record[0] >= TypeList.size() || !TypeList[Record[0]]) |
2177 | return error("Invalid record"); |
2178 | if (TypeList[Record[0]] == VoidType) |
2179 | return error("Invalid constant type"); |
2180 | CurTy = TypeList[Record[0]]; |
2181 | continue; // Skip the ValueList manipulation. |
2182 | case bitc::CST_CODE_NULL: // NULL |
2183 | V = Constant::getNullValue(CurTy); |
2184 | break; |
2185 | case bitc::CST_CODE_INTEGER: // INTEGER: [intval] |
2186 | if (!CurTy->isIntegerTy() || Record.empty()) |
2187 | return error("Invalid record"); |
2188 | V = ConstantInt::get(CurTy, decodeSignRotatedValue(Record[0])); |
2189 | break; |
2190 | case bitc::CST_CODE_WIDE_INTEGER: {// WIDE_INTEGER: [n x intval] |
2191 | if (!CurTy->isIntegerTy() || Record.empty()) |
2192 | return error("Invalid record"); |
2193 | |
2194 | APInt VInt = |
2195 | readWideAPInt(Record, cast<IntegerType>(CurTy)->getBitWidth()); |
2196 | V = ConstantInt::get(Context, VInt); |
2197 | |
2198 | break; |
2199 | } |
2200 | case bitc::CST_CODE_FLOAT: { // FLOAT: [fpval] |
2201 | if (Record.empty()) |
2202 | return error("Invalid record"); |
2203 | if (CurTy->isHalfTy()) |
2204 | V = ConstantFP::get(Context, APFloat(APFloat::IEEEhalf(), |
2205 | APInt(16, (uint16_t)Record[0]))); |
2206 | else if (CurTy->isFloatTy()) |
2207 | V = ConstantFP::get(Context, APFloat(APFloat::IEEEsingle(), |
2208 | APInt(32, (uint32_t)Record[0]))); |
2209 | else if (CurTy->isDoubleTy()) |
2210 | V = ConstantFP::get(Context, APFloat(APFloat::IEEEdouble(), |
2211 | APInt(64, Record[0]))); |
2212 | else if (CurTy->isX86_FP80Ty()) { |
2213 | // Bits are not stored the same way as a normal i80 APInt, compensate. |
2214 | uint64_t Rearrange[2]; |
2215 | Rearrange[0] = (Record[1] & 0xffffLL) | (Record[0] << 16); |
2216 | Rearrange[1] = Record[0] >> 48; |
2217 | V = ConstantFP::get(Context, APFloat(APFloat::x87DoubleExtended(), |
2218 | APInt(80, Rearrange))); |
2219 | } else if (CurTy->isFP128Ty()) |
2220 | V = ConstantFP::get(Context, APFloat(APFloat::IEEEquad(), |
2221 | APInt(128, Record))); |
2222 | else if (CurTy->isPPC_FP128Ty()) |
2223 | V = ConstantFP::get(Context, APFloat(APFloat::PPCDoubleDouble(), |
2224 | APInt(128, Record))); |
2225 | else |
2226 | V = UndefValue::get(CurTy); |
2227 | break; |
2228 | } |
2229 | |
2230 | case bitc::CST_CODE_AGGREGATE: {// AGGREGATE: [n x value number] |
2231 | if (Record.empty()) |
2232 | return error("Invalid record"); |
2233 | |
2234 | unsigned Size = Record.size(); |
2235 | SmallVector<Constant*, 16> Elts; |
2236 | |
2237 | if (StructType *STy = dyn_cast<StructType>(CurTy)) { |
2238 | for (unsigned i = 0; i != Size; ++i) |
2239 | Elts.push_back(ValueList.getConstantFwdRef(Record[i], |
2240 | STy->getElementType(i))); |
2241 | V = ConstantStruct::get(STy, Elts); |
2242 | } else if (ArrayType *ATy = dyn_cast<ArrayType>(CurTy)) { |
2243 | Type *EltTy = ATy->getElementType(); |
2244 | for (unsigned i = 0; i != Size; ++i) |
2245 | Elts.push_back(ValueList.getConstantFwdRef(Record[i], EltTy)); |
2246 | V = ConstantArray::get(ATy, Elts); |
2247 | } else if (VectorType *VTy = dyn_cast<VectorType>(CurTy)) { |
2248 | Type *EltTy = VTy->getElementType(); |
2249 | for (unsigned i = 0; i != Size; ++i) |
2250 | Elts.push_back(ValueList.getConstantFwdRef(Record[i], EltTy)); |
2251 | V = ConstantVector::get(Elts); |
2252 | } else { |
2253 | V = UndefValue::get(CurTy); |
2254 | } |
2255 | break; |
2256 | } |
2257 | case bitc::CST_CODE_STRING: // STRING: [values] |
2258 | case bitc::CST_CODE_CSTRING: { // CSTRING: [values] |
2259 | if (Record.empty()) |
2260 | return error("Invalid record"); |
2261 | |
2262 | SmallString<16> Elts(Record.begin(), Record.end()); |
2263 | V = ConstantDataArray::getString(Context, Elts, |
2264 | BitCode == bitc::CST_CODE_CSTRING); |
2265 | break; |
2266 | } |
2267 | case bitc::CST_CODE_DATA: {// DATA: [n x value] |
2268 | if (Record.empty()) |
2269 | return error("Invalid record"); |
2270 | |
2271 | Type *EltTy = cast<SequentialType>(CurTy)->getElementType(); |
2272 | if (EltTy->isIntegerTy(8)) { |
2273 | SmallVector<uint8_t, 16> Elts(Record.begin(), Record.end()); |
2274 | if (isa<VectorType>(CurTy)) |
2275 | V = ConstantDataVector::get(Context, Elts); |
2276 | else |
2277 | V = ConstantDataArray::get(Context, Elts); |
2278 | } else if (EltTy->isIntegerTy(16)) { |
2279 | SmallVector<uint16_t, 16> Elts(Record.begin(), Record.end()); |
2280 | if (isa<VectorType>(CurTy)) |
2281 | V = ConstantDataVector::get(Context, Elts); |
2282 | else |
2283 | V = ConstantDataArray::get(Context, Elts); |
2284 | } else if (EltTy->isIntegerTy(32)) { |
2285 | SmallVector<uint32_t, 16> Elts(Record.begin(), Record.end()); |
2286 | if (isa<VectorType>(CurTy)) |
2287 | V = ConstantDataVector::get(Context, Elts); |
2288 | else |
2289 | V = ConstantDataArray::get(Context, Elts); |
2290 | } else if (EltTy->isIntegerTy(64)) { |
2291 | SmallVector<uint64_t, 16> Elts(Record.begin(), Record.end()); |
2292 | if (isa<VectorType>(CurTy)) |
2293 | V = ConstantDataVector::get(Context, Elts); |
2294 | else |
2295 | V = ConstantDataArray::get(Context, Elts); |
2296 | } else if (EltTy->isHalfTy()) { |
2297 | SmallVector<uint16_t, 16> Elts(Record.begin(), Record.end()); |
2298 | if (isa<VectorType>(CurTy)) |
2299 | V = ConstantDataVector::getFP(Context, Elts); |
2300 | else |
2301 | V = ConstantDataArray::getFP(Context, Elts); |
2302 | } else if (EltTy->isFloatTy()) { |
2303 | SmallVector<uint32_t, 16> Elts(Record.begin(), Record.end()); |
2304 | if (isa<VectorType>(CurTy)) |
2305 | V = ConstantDataVector::getFP(Context, Elts); |
2306 | else |
2307 | V = ConstantDataArray::getFP(Context, Elts); |
2308 | } else if (EltTy->isDoubleTy()) { |
2309 | SmallVector<uint64_t, 16> Elts(Record.begin(), Record.end()); |
2310 | if (isa<VectorType>(CurTy)) |
2311 | V = ConstantDataVector::getFP(Context, Elts); |
2312 | else |
2313 | V = ConstantDataArray::getFP(Context, Elts); |
2314 | } else { |
2315 | return error("Invalid type for value"); |
2316 | } |
2317 | break; |
2318 | } |
2319 | case bitc::CST_CODE_CE_BINOP: { // CE_BINOP: [opcode, opval, opval] |
2320 | if (Record.size() < 3) |
2321 | return error("Invalid record"); |
2322 | int Opc = getDecodedBinaryOpcode(Record[0], CurTy); |
2323 | if (Opc < 0) { |
2324 | V = UndefValue::get(CurTy); // Unknown binop. |
2325 | } else { |
2326 | Constant *LHS = ValueList.getConstantFwdRef(Record[1], CurTy); |
2327 | Constant *RHS = ValueList.getConstantFwdRef(Record[2], CurTy); |
2328 | unsigned Flags = 0; |
2329 | if (Record.size() >= 4) { |
2330 | if (Opc == Instruction::Add || |
2331 | Opc == Instruction::Sub || |
2332 | Opc == Instruction::Mul || |
2333 | Opc == Instruction::Shl) { |
2334 | if (Record[3] & (1 << bitc::OBO_NO_SIGNED_WRAP)) |
2335 | Flags |= OverflowingBinaryOperator::NoSignedWrap; |
2336 | if (Record[3] & (1 << bitc::OBO_NO_UNSIGNED_WRAP)) |
2337 | Flags |= OverflowingBinaryOperator::NoUnsignedWrap; |
2338 | } else if (Opc == Instruction::SDiv || |
2339 | Opc == Instruction::UDiv || |
2340 | Opc == Instruction::LShr || |
2341 | Opc == Instruction::AShr) { |
2342 | if (Record[3] & (1 << bitc::PEO_EXACT)) |
2343 | Flags |= SDivOperator::IsExact; |
2344 | } |
2345 | } |
2346 | V = ConstantExpr::get(Opc, LHS, RHS, Flags); |
2347 | } |
2348 | break; |
2349 | } |
2350 | case bitc::CST_CODE_CE_CAST: { // CE_CAST: [opcode, opty, opval] |
2351 | if (Record.size() < 3) |
2352 | return error("Invalid record"); |
2353 | int Opc = getDecodedCastOpcode(Record[0]); |
2354 | if (Opc < 0) { |
2355 | V = UndefValue::get(CurTy); // Unknown cast. |
2356 | } else { |
2357 | Type *OpTy = getTypeByID(Record[1]); |
2358 | if (!OpTy) |
2359 | return error("Invalid record"); |
2360 | Constant *Op = ValueList.getConstantFwdRef(Record[2], OpTy); |
2361 | V = UpgradeBitCastExpr(Opc, Op, CurTy); |
2362 | if (!V) V = ConstantExpr::getCast(Opc, Op, CurTy); |
2363 | } |
2364 | break; |
2365 | } |
2366 | case bitc::CST_CODE_CE_INBOUNDS_GEP: // [ty, n x operands] |
2367 | case bitc::CST_CODE_CE_GEP: // [ty, n x operands] |
2368 | case bitc::CST_CODE_CE_GEP_WITH_INRANGE_INDEX: { // [ty, flags, n x |
2369 | // operands] |
2370 | unsigned OpNum = 0; |
2371 | Type *PointeeType = nullptr; |
2372 | if (BitCode == bitc::CST_CODE_CE_GEP_WITH_INRANGE_INDEX || |
2373 | Record.size() % 2) |
2374 | PointeeType = getTypeByID(Record[OpNum++]); |
2375 | |
2376 | bool InBounds = false; |
2377 | Optional<unsigned> InRangeIndex; |
2378 | if (BitCode == bitc::CST_CODE_CE_GEP_WITH_INRANGE_INDEX) { |
2379 | uint64_t Op = Record[OpNum++]; |
2380 | InBounds = Op & 1; |
2381 | InRangeIndex = Op >> 1; |
2382 | } else if (BitCode == bitc::CST_CODE_CE_INBOUNDS_GEP) |
2383 | InBounds = true; |
2384 | |
2385 | SmallVector<Constant*, 16> Elts; |
2386 | while (OpNum != Record.size()) { |
2387 | Type *ElTy = getTypeByID(Record[OpNum++]); |
2388 | if (!ElTy) |
2389 | return error("Invalid record"); |
2390 | Elts.push_back(ValueList.getConstantFwdRef(Record[OpNum++], ElTy)); |
2391 | } |
2392 | |
2393 | if (PointeeType && |
2394 | PointeeType != |
2395 | cast<PointerType>(Elts[0]->getType()->getScalarType()) |
2396 | ->getElementType()) |
2397 | return error("Explicit gep operator type does not match pointee type " |
2398 | "of pointer operand"); |
2399 | |
2400 | if (Elts.size() < 1) |
2401 | return error("Invalid gep with no operands"); |
2402 | |
2403 | ArrayRef<Constant *> Indices(Elts.begin() + 1, Elts.end()); |
2404 | V = ConstantExpr::getGetElementPtr(PointeeType, Elts[0], Indices, |
2405 | InBounds, InRangeIndex); |
2406 | break; |
2407 | } |
2408 | case bitc::CST_CODE_CE_SELECT: { // CE_SELECT: [opval#, opval#, opval#] |
2409 | if (Record.size() < 3) |
2410 | return error("Invalid record"); |
2411 | |
2412 | Type *SelectorTy = Type::getInt1Ty(Context); |
2413 | |
2414 | // The selector might be an i1 or an <n x i1> |
2415 | // Get the type from the ValueList before getting a forward ref. |
2416 | if (VectorType *VTy = dyn_cast<VectorType>(CurTy)) |
2417 | if (Value *V = ValueList[Record[0]]) |
2418 | if (SelectorTy != V->getType()) |
2419 | SelectorTy = VectorType::get(SelectorTy, VTy->getNumElements()); |
2420 | |
2421 | V = ConstantExpr::getSelect(ValueList.getConstantFwdRef(Record[0], |
2422 | SelectorTy), |
2423 | ValueList.getConstantFwdRef(Record[1],CurTy), |
2424 | ValueList.getConstantFwdRef(Record[2],CurTy)); |
2425 | break; |
2426 | } |
2427 | case bitc::CST_CODE_CE_EXTRACTELT |
2428 | : { // CE_EXTRACTELT: [opty, opval, opty, opval] |
2429 | if (Record.size() < 3) |
2430 | return error("Invalid record"); |
2431 | VectorType *OpTy = |
2432 | dyn_cast_or_null<VectorType>(getTypeByID(Record[0])); |
2433 | if (!OpTy) |
2434 | return error("Invalid record"); |
2435 | Constant *Op0 = ValueList.getConstantFwdRef(Record[1], OpTy); |
2436 | Constant *Op1 = nullptr; |
2437 | if (Record.size() == 4) { |
2438 | Type *IdxTy = getTypeByID(Record[2]); |
2439 | if (!IdxTy) |
2440 | return error("Invalid record"); |
2441 | Op1 = ValueList.getConstantFwdRef(Record[3], IdxTy); |
2442 | } else // TODO: Remove with llvm 4.0 |
2443 | Op1 = ValueList.getConstantFwdRef(Record[2], Type::getInt32Ty(Context)); |
2444 | if (!Op1) |
2445 | return error("Invalid record"); |
2446 | V = ConstantExpr::getExtractElement(Op0, Op1); |
2447 | break; |
2448 | } |
2449 | case bitc::CST_CODE_CE_INSERTELT |
2450 | : { // CE_INSERTELT: [opval, opval, opty, opval] |
2451 | VectorType *OpTy = dyn_cast<VectorType>(CurTy); |
2452 | if (Record.size() < 3 || !OpTy) |
2453 | return error("Invalid record"); |
2454 | Constant *Op0 = ValueList.getConstantFwdRef(Record[0], OpTy); |
2455 | Constant *Op1 = ValueList.getConstantFwdRef(Record[1], |
2456 | OpTy->getElementType()); |
2457 | Constant *Op2 = nullptr; |
2458 | if (Record.size() == 4) { |
2459 | Type *IdxTy = getTypeByID(Record[2]); |
2460 | if (!IdxTy) |
2461 | return error("Invalid record"); |
2462 | Op2 = ValueList.getConstantFwdRef(Record[3], IdxTy); |
2463 | } else // TODO: Remove with llvm 4.0 |
2464 | Op2 = ValueList.getConstantFwdRef(Record[2], Type::getInt32Ty(Context)); |
2465 | if (!Op2) |
2466 | return error("Invalid record"); |
2467 | V = ConstantExpr::getInsertElement(Op0, Op1, Op2); |
2468 | break; |
2469 | } |
2470 | case bitc::CST_CODE_CE_SHUFFLEVEC: { // CE_SHUFFLEVEC: [opval, opval, opval] |
2471 | VectorType *OpTy = dyn_cast<VectorType>(CurTy); |
2472 | if (Record.size() < 3 || !OpTy) |
2473 | return error("Invalid record"); |
2474 | Constant *Op0 = ValueList.getConstantFwdRef(Record[0], OpTy); |
2475 | Constant *Op1 = ValueList.getConstantFwdRef(Record[1], OpTy); |
2476 | Type *ShufTy = VectorType::get(Type::getInt32Ty(Context), |
2477 | OpTy->getNumElements()); |
2478 | Constant *Op2 = ValueList.getConstantFwdRef(Record[2], ShufTy); |
2479 | V = ConstantExpr::getShuffleVector(Op0, Op1, Op2); |
2480 | break; |
2481 | } |
2482 | case bitc::CST_CODE_CE_SHUFVEC_EX: { // [opty, opval, opval, opval] |
2483 | VectorType *RTy = dyn_cast<VectorType>(CurTy); |
2484 | VectorType *OpTy = |
2485 | dyn_cast_or_null<VectorType>(getTypeByID(Record[0])); |
2486 | if (Record.size() < 4 || !RTy || !OpTy) |
2487 | return error("Invalid record"); |
2488 | Constant *Op0 = ValueList.getConstantFwdRef(Record[1], OpTy); |
2489 | Constant *Op1 = ValueList.getConstantFwdRef(Record[2], OpTy); |
2490 | Type *ShufTy = VectorType::get(Type::getInt32Ty(Context), |
2491 | RTy->getNumElements()); |
2492 | Constant *Op2 = ValueList.getConstantFwdRef(Record[3], ShufTy); |
2493 | V = ConstantExpr::getShuffleVector(Op0, Op1, Op2); |
2494 | break; |
2495 | } |
2496 | case bitc::CST_CODE_CE_CMP: { // CE_CMP: [opty, opval, opval, pred] |
2497 | if (Record.size() < 4) |
2498 | return error("Invalid record"); |
2499 | Type *OpTy = getTypeByID(Record[0]); |
2500 | if (!OpTy) |
2501 | return error("Invalid record"); |
2502 | Constant *Op0 = ValueList.getConstantFwdRef(Record[1], OpTy); |
2503 | Constant *Op1 = ValueList.getConstantFwdRef(Record[2], OpTy); |
2504 | |
2505 | if (OpTy->isFPOrFPVectorTy()) |
2506 | V = ConstantExpr::getFCmp(Record[3], Op0, Op1); |
2507 | else |
2508 | V = ConstantExpr::getICmp(Record[3], Op0, Op1); |
2509 | break; |
2510 | } |
2511 | // This maintains backward compatibility, pre-asm dialect keywords. |
2512 | // FIXME: Remove with the 4.0 release. |
2513 | case bitc::CST_CODE_INLINEASM_OLD: { |
2514 | if (Record.size() < 2) |
2515 | return error("Invalid record"); |
2516 | std::string AsmStr, ConstrStr; |
2517 | bool HasSideEffects = Record[0] & 1; |
2518 | bool IsAlignStack = Record[0] >> 1; |
2519 | unsigned AsmStrSize = Record[1]; |
2520 | if (2+AsmStrSize >= Record.size()) |
2521 | return error("Invalid record"); |
2522 | unsigned ConstStrSize = Record[2+AsmStrSize]; |
2523 | if (3+AsmStrSize+ConstStrSize > Record.size()) |
2524 | return error("Invalid record"); |
2525 | |
2526 | for (unsigned i = 0; i != AsmStrSize; ++i) |
2527 | AsmStr += (char)Record[2+i]; |
2528 | for (unsigned i = 0; i != ConstStrSize; ++i) |
2529 | ConstrStr += (char)Record[3+AsmStrSize+i]; |
2530 | PointerType *PTy = cast<PointerType>(CurTy); |
2531 | UpgradeInlineAsmString(&AsmStr); |
2532 | V = InlineAsm::get(cast<FunctionType>(PTy->getElementType()), |
2533 | AsmStr, ConstrStr, HasSideEffects, IsAlignStack); |
2534 | break; |
2535 | } |
2536 | // This version adds support for the asm dialect keywords (e.g., |
2537 | // inteldialect). |
2538 | case bitc::CST_CODE_INLINEASM: { |
2539 | if (Record.size() < 2) |
2540 | return error("Invalid record"); |
2541 | std::string AsmStr, ConstrStr; |
2542 | bool HasSideEffects = Record[0] & 1; |
2543 | bool IsAlignStack = (Record[0] >> 1) & 1; |
2544 | unsigned AsmDialect = Record[0] >> 2; |
2545 | unsigned AsmStrSize = Record[1]; |
2546 | if (2+AsmStrSize >= Record.size()) |
2547 | return error("Invalid record"); |
2548 | unsigned ConstStrSize = Record[2+AsmStrSize]; |
2549 | if (3+AsmStrSize+ConstStrSize > Record.size()) |
2550 | return error("Invalid record"); |
2551 | |
2552 | for (unsigned i = 0; i != AsmStrSize; ++i) |
2553 | AsmStr += (char)Record[2+i]; |
2554 | for (unsigned i = 0; i != ConstStrSize; ++i) |
2555 | ConstrStr += (char)Record[3+AsmStrSize+i]; |
2556 | PointerType *PTy = cast<PointerType>(CurTy); |
2557 | UpgradeInlineAsmString(&AsmStr); |
2558 | V = InlineAsm::get(cast<FunctionType>(PTy->getElementType()), |
2559 | AsmStr, ConstrStr, HasSideEffects, IsAlignStack, |
2560 | InlineAsm::AsmDialect(AsmDialect)); |
2561 | break; |
2562 | } |
2563 | case bitc::CST_CODE_BLOCKADDRESS:{ |
2564 | if (Record.size() < 3) |
2565 | return error("Invalid record"); |
2566 | Type *FnTy = getTypeByID(Record[0]); |
2567 | if (!FnTy) |
2568 | return error("Invalid record"); |
2569 | Function *Fn = |
2570 | dyn_cast_or_null<Function>(ValueList.getConstantFwdRef(Record[1],FnTy)); |
2571 | if (!Fn) |
2572 | return error("Invalid record"); |
2573 | |
2574 | // If the function is already parsed we can insert the block address right |
2575 | // away. |
2576 | BasicBlock *BB; |
2577 | unsigned BBID = Record[2]; |
2578 | if (!BBID) |
2579 | // Invalid reference to entry block. |
2580 | return error("Invalid ID"); |
2581 | if (!Fn->empty()) { |
2582 | Function::iterator BBI = Fn->begin(), BBE = Fn->end(); |
2583 | for (size_t I = 0, E = BBID; I != E; ++I) { |
2584 | if (BBI == BBE) |
2585 | return error("Invalid ID"); |
2586 | ++BBI; |
2587 | } |
2588 | BB = &*BBI; |
2589 | } else { |
2590 | // Otherwise insert a placeholder and remember it so it can be inserted |
2591 | // when the function is parsed. |
2592 | auto &FwdBBs = BasicBlockFwdRefs[Fn]; |
2593 | if (FwdBBs.empty()) |
2594 | BasicBlockFwdRefQueue.push_back(Fn); |
2595 | if (FwdBBs.size() < BBID + 1) |
2596 | FwdBBs.resize(BBID + 1); |
2597 | if (!FwdBBs[BBID]) |
2598 | FwdBBs[BBID] = BasicBlock::Create(Context); |
2599 | BB = FwdBBs[BBID]; |
2600 | } |
2601 | V = BlockAddress::get(Fn, BB); |
2602 | break; |
2603 | } |
2604 | } |
2605 | |
2606 | ValueList.assignValue(V, NextCstNo); |
2607 | ++NextCstNo; |
2608 | } |
2609 | } |
2610 | |
2611 | Error BitcodeReader::parseUseLists() { |
2612 | if (Stream.EnterSubBlock(bitc::USELIST_BLOCK_ID)) |
2613 | return error("Invalid record"); |
2614 | |
2615 | // Read all the records. |
2616 | SmallVector<uint64_t, 64> Record; |
2617 | |
2618 | while (true) { |
2619 | BitstreamEntry Entry = Stream.advanceSkippingSubblocks(); |
2620 | |
2621 | switch (Entry.Kind) { |
2622 | case BitstreamEntry::SubBlock: // Handled for us already. |
2623 | case BitstreamEntry::Error: |
2624 | return error("Malformed block"); |
2625 | case BitstreamEntry::EndBlock: |
2626 | return Error::success(); |
2627 | case BitstreamEntry::Record: |
2628 | // The interesting case. |
2629 | break; |
2630 | } |
2631 | |
2632 | // Read a use list record. |
2633 | Record.clear(); |
2634 | bool IsBB = false; |
2635 | switch (Stream.readRecord(Entry.ID, Record)) { |
2636 | default: // Default behavior: unknown type. |
2637 | break; |
2638 | case bitc::USELIST_CODE_BB: |
2639 | IsBB = true; |
2640 | LLVM_FALLTHROUGH[[clang::fallthrough]]; |
2641 | case bitc::USELIST_CODE_DEFAULT: { |
2642 | unsigned RecordLength = Record.size(); |
2643 | if (RecordLength < 3) |
2644 | // Records should have at least an ID and two indexes. |
2645 | return error("Invalid record"); |
2646 | unsigned ID = Record.back(); |
2647 | Record.pop_back(); |
2648 | |
2649 | Value *V; |
2650 | if (IsBB) { |
2651 | 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\"" , "/build/llvm-toolchain-snapshot-8~svn345461/lib/Bitcode/Reader/BitcodeReader.cpp" , 2651, __PRETTY_FUNCTION__)); |
2652 | V = FunctionBBs[ID]; |
2653 | } else |
2654 | V = ValueList[ID]; |
2655 | unsigned NumUses = 0; |
2656 | SmallDenseMap<const Use *, unsigned, 16> Order; |
2657 | for (const Use &U : V->materialized_uses()) { |
2658 | if (++NumUses > Record.size()) |
2659 | break; |
2660 | Order[&U] = Record[NumUses - 1]; |
2661 | } |
2662 | if (Order.size() != Record.size() || NumUses > Record.size()) |
2663 | // Mismatches can happen if the functions are being materialized lazily |
2664 | // (out-of-order), or a value has been upgraded. |
2665 | break; |
2666 | |
2667 | V->sortUseList([&](const Use &L, const Use &R) { |
2668 | return Order.lookup(&L) < Order.lookup(&R); |
2669 | }); |
2670 | break; |
2671 | } |
2672 | } |
2673 | } |
2674 | } |
2675 | |
2676 | /// When we see the block for metadata, remember where it is and then skip it. |
2677 | /// This lets us lazily deserialize the metadata. |
2678 | Error BitcodeReader::rememberAndSkipMetadata() { |
2679 | // Save the current stream state. |
2680 | uint64_t CurBit = Stream.GetCurrentBitNo(); |
2681 | DeferredMetadataInfo.push_back(CurBit); |
2682 | |
2683 | // Skip over the block for now. |
2684 | if (Stream.SkipBlock()) |
2685 | return error("Invalid record"); |
2686 | return Error::success(); |
2687 | } |
2688 | |
2689 | Error BitcodeReader::materializeMetadata() { |
2690 | for (uint64_t BitPos : DeferredMetadataInfo) { |
2691 | // Move the bit stream to the saved position. |
2692 | Stream.JumpToBit(BitPos); |
2693 | if (Error Err = MDLoader->parseModuleMetadata()) |
2694 | return Err; |
2695 | } |
2696 | |
2697 | // Upgrade "Linker Options" module flag to "llvm.linker.options" module-level |
2698 | // metadata. |
2699 | if (Metadata *Val = TheModule->getModuleFlag("Linker Options")) { |
2700 | NamedMDNode *LinkerOpts = |
2701 | TheModule->getOrInsertNamedMetadata("llvm.linker.options"); |
2702 | for (const MDOperand &MDOptions : cast<MDNode>(Val)->operands()) |
2703 | LinkerOpts->addOperand(cast<MDNode>(MDOptions)); |
2704 | } |
2705 | |
2706 | DeferredMetadataInfo.clear(); |
2707 | return Error::success(); |
2708 | } |
2709 | |
2710 | void BitcodeReader::setStripDebugInfo() { StripDebugInfo = true; } |
2711 | |
2712 | /// When we see the block for a function body, remember where it is and then |
2713 | /// skip it. This lets us lazily deserialize the functions. |
2714 | Error BitcodeReader::rememberAndSkipFunctionBody() { |
2715 | // Get the function we are talking about. |
2716 | if (FunctionsWithBodies.empty()) |
2717 | return error("Insufficient function protos"); |
2718 | |
2719 | Function *Fn = FunctionsWithBodies.back(); |
2720 | FunctionsWithBodies.pop_back(); |
2721 | |
2722 | // Save the current stream state. |
2723 | uint64_t CurBit = Stream.GetCurrentBitNo(); |
2724 | 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\"" , "/build/llvm-toolchain-snapshot-8~svn345461/lib/Bitcode/Reader/BitcodeReader.cpp" , 2726, __PRETTY_FUNCTION__)) |
2725 | (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\"" , "/build/llvm-toolchain-snapshot-8~svn345461/lib/Bitcode/Reader/BitcodeReader.cpp" , 2726, __PRETTY_FUNCTION__)) |
2726 | "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\"" , "/build/llvm-toolchain-snapshot-8~svn345461/lib/Bitcode/Reader/BitcodeReader.cpp" , 2726, __PRETTY_FUNCTION__)); |
2727 | DeferredFunctionInfo[Fn] = CurBit; |
2728 | |
2729 | // Skip over the function block for now. |
2730 | if (Stream.SkipBlock()) |
2731 | return error("Invalid record"); |
2732 | return Error::success(); |
2733 | } |
2734 | |
2735 | Error BitcodeReader::globalCleanup() { |
2736 | // Patch the initializers for globals and aliases up. |
2737 | if (Error Err = resolveGlobalAndIndirectSymbolInits()) |
2738 | return Err; |
2739 | if (!GlobalInits.empty() || !IndirectSymbolInits.empty()) |
2740 | return error("Malformed global initializer set"); |
2741 | |
2742 | // Look for intrinsic functions which need to be upgraded at some point |
2743 | for (Function &F : *TheModule) { |
2744 | MDLoader->upgradeDebugIntrinsics(F); |
2745 | Function *NewFn; |
2746 | if (UpgradeIntrinsicFunction(&F, NewFn)) |
2747 | UpgradedIntrinsics[&F] = NewFn; |
2748 | else if (auto Remangled = Intrinsic::remangleIntrinsicFunction(&F)) |
2749 | // Some types could be renamed during loading if several modules are |
2750 | // loaded in the same LLVMContext (LTO scenario). In this case we should |
2751 | // remangle intrinsics names as well. |
2752 | RemangledIntrinsics[&F] = Remangled.getValue(); |
2753 | } |
2754 | |
2755 | // Look for global variables which need to be renamed. |
2756 | for (GlobalVariable &GV : TheModule->globals()) |
2757 | UpgradeGlobalVariable(&GV); |
2758 | |
2759 | // Force deallocation of memory for these vectors to favor the client that |
2760 | // want lazy deserialization. |
2761 | std::vector<std::pair<GlobalVariable *, unsigned>>().swap(GlobalInits); |
2762 | std::vector<std::pair<GlobalIndirectSymbol *, unsigned>>().swap( |
2763 | IndirectSymbolInits); |
2764 | return Error::success(); |
2765 | } |
2766 | |
2767 | /// Support for lazy parsing of function bodies. This is required if we |
2768 | /// either have an old bitcode file without a VST forward declaration record, |
2769 | /// or if we have an anonymous function being materialized, since anonymous |
2770 | /// functions do not have a name and are therefore not in the VST. |
2771 | Error BitcodeReader::rememberAndSkipFunctionBodies() { |
2772 | Stream.JumpToBit(NextUnreadBit); |
2773 | |
2774 | if (Stream.AtEndOfStream()) |
2775 | return error("Could not find function in stream"); |
2776 | |
2777 | if (!SeenFirstFunctionBody) |
2778 | return error("Trying to materialize functions before seeing function blocks"); |
2779 | |
2780 | // An old bitcode file with the symbol table at the end would have |
2781 | // finished the parse greedily. |
2782 | assert(SeenValueSymbolTable)((SeenValueSymbolTable) ? static_cast<void> (0) : __assert_fail ("SeenValueSymbolTable", "/build/llvm-toolchain-snapshot-8~svn345461/lib/Bitcode/Reader/BitcodeReader.cpp" , 2782, __PRETTY_FUNCTION__)); |
2783 | |
2784 | SmallVector<uint64_t, 64> Record; |
2785 | |
2786 | while (true) { |
2787 | BitstreamEntry Entry = Stream.advance(); |
2788 | switch (Entry.Kind) { |
2789 | default: |
2790 | return error("Expect SubBlock"); |
2791 | case BitstreamEntry::SubBlock: |
2792 | switch (Entry.ID) { |
2793 | default: |
2794 | return error("Expect function block"); |
2795 | case bitc::FUNCTION_BLOCK_ID: |
2796 | if (Error Err = rememberAndSkipFunctionBody()) |
2797 | return Err; |
2798 | NextUnreadBit = Stream.GetCurrentBitNo(); |
2799 | return Error::success(); |
2800 | } |
2801 | } |
2802 | } |
2803 | } |
2804 | |
2805 | bool BitcodeReaderBase::readBlockInfo() { |
2806 | Optional<BitstreamBlockInfo> NewBlockInfo = Stream.ReadBlockInfoBlock(); |
2807 | if (!NewBlockInfo) |
2808 | return true; |
2809 | BlockInfo = std::move(*NewBlockInfo); |
2810 | return false; |
2811 | } |
2812 | |
2813 | Error BitcodeReader::parseComdatRecord(ArrayRef<uint64_t> Record) { |
2814 | // v1: [selection_kind, name] |
2815 | // v2: [strtab_offset, strtab_size, selection_kind] |
2816 | StringRef Name; |
2817 | std::tie(Name, Record) = readNameFromStrtab(Record); |
2818 | |
2819 | if (Record.empty()) |
2820 | return error("Invalid record"); |
2821 | Comdat::SelectionKind SK = getDecodedComdatSelectionKind(Record[0]); |
2822 | std::string OldFormatName; |
2823 | if (!UseStrtab) { |
2824 | if (Record.size() < 2) |
2825 | return error("Invalid record"); |
2826 | unsigned ComdatNameSize = Record[1]; |
2827 | OldFormatName.reserve(ComdatNameSize); |
2828 | for (unsigned i = 0; i != ComdatNameSize; ++i) |
2829 | OldFormatName += (char)Record[2 + i]; |
2830 | Name = OldFormatName; |
2831 | } |
2832 | Comdat *C = TheModule->getOrInsertComdat(Name); |
2833 | C->setSelectionKind(SK); |
2834 | ComdatList.push_back(C); |
2835 | return Error::success(); |
2836 | } |
2837 | |
2838 | static void inferDSOLocal(GlobalValue *GV) { |
2839 | // infer dso_local from linkage and visibility if it is not encoded. |
2840 | if (GV->hasLocalLinkage() || |
2841 | (!GV->hasDefaultVisibility() && !GV->hasExternalWeakLinkage())) |
2842 | GV->setDSOLocal(true); |
2843 | } |
2844 | |
2845 | Error BitcodeReader::parseGlobalVarRecord(ArrayRef<uint64_t> Record) { |
2846 | // v1: [pointer type, isconst, initid, linkage, alignment, section, |
2847 | // visibility, threadlocal, unnamed_addr, externally_initialized, |
2848 | // dllstorageclass, comdat, attributes, preemption specifier] (name in VST) |
2849 | // v2: [strtab_offset, strtab_size, v1] |
2850 | StringRef Name; |
2851 | std::tie(Name, Record) = readNameFromStrtab(Record); |
2852 | |
2853 | if (Record.size() < 6) |
2854 | return error("Invalid record"); |
2855 | Type *Ty = getTypeByID(Record[0]); |
2856 | if (!Ty) |
2857 | return error("Invalid record"); |
2858 | bool isConstant = Record[1] & 1; |
2859 | bool explicitType = Record[1] & 2; |
2860 | unsigned AddressSpace; |
2861 | if (explicitType) { |
2862 | AddressSpace = Record[1] >> 2; |
2863 | } else { |
2864 | if (!Ty->isPointerTy()) |
2865 | return error("Invalid type for value"); |
2866 | AddressSpace = cast<PointerType>(Ty)->getAddressSpace(); |
2867 | Ty = cast<PointerType>(Ty)->getElementType(); |
2868 | } |
2869 | |
2870 | uint64_t RawLinkage = Record[3]; |
2871 | GlobalValue::LinkageTypes Linkage = getDecodedLinkage(RawLinkage); |
2872 | unsigned Alignment; |
2873 | if (Error Err = parseAlignmentValue(Record[4], Alignment)) |
2874 | return Err; |
2875 | std::string Section; |
2876 | if (Record[5]) { |
2877 | if (Record[5] - 1 >= SectionTable.size()) |
2878 | return error("Invalid ID"); |
2879 | Section = SectionTable[Record[5] - 1]; |
2880 | } |
2881 | GlobalValue::VisibilityTypes Visibility = GlobalValue::DefaultVisibility; |
2882 | // Local linkage must have default visibility. |
2883 | if (Record.size() > 6 && !GlobalValue::isLocalLinkage(Linkage)) |
2884 | // FIXME: Change to an error if non-default in 4.0. |
2885 | Visibility = getDecodedVisibility(Record[6]); |
2886 | |
2887 | GlobalVariable::ThreadLocalMode TLM = GlobalVariable::NotThreadLocal; |
2888 | if (Record.size() > 7) |
2889 | TLM = getDecodedThreadLocalMode(Record[7]); |
2890 | |
2891 | GlobalValue::UnnamedAddr UnnamedAddr = GlobalValue::UnnamedAddr::None; |
2892 | if (Record.size() > 8) |
2893 | UnnamedAddr = getDecodedUnnamedAddrType(Record[8]); |
2894 | |
2895 | bool ExternallyInitialized = false; |
2896 | if (Record.size() > 9) |
2897 | ExternallyInitialized = Record[9]; |
2898 | |
2899 | GlobalVariable *NewGV = |
2900 | new GlobalVariable(*TheModule, Ty, isConstant, Linkage, nullptr, Name, |
2901 | nullptr, TLM, AddressSpace, ExternallyInitialized); |
2902 | NewGV->setAlignment(Alignment); |
2903 | if (!Section.empty()) |
2904 | NewGV->setSection(Section); |
2905 | NewGV->setVisibility(Visibility); |
2906 | NewGV->setUnnamedAddr(UnnamedAddr); |
2907 | |
2908 | if (Record.size() > 10) |
2909 | NewGV->setDLLStorageClass(getDecodedDLLStorageClass(Record[10])); |
2910 | else |
2911 | upgradeDLLImportExportLinkage(NewGV, RawLinkage); |
2912 | |
2913 | ValueList.push_back(NewGV); |
2914 | |
2915 | // Remember which value to use for the global initializer. |
2916 | if (unsigned InitID = Record[2]) |
2917 | GlobalInits.push_back(std::make_pair(NewGV, InitID - 1)); |
2918 | |
2919 | if (Record.size() > 11) { |
2920 | if (unsigned ComdatID = Record[11]) { |
2921 | if (ComdatID > ComdatList.size()) |
2922 | return error("Invalid global variable comdat ID"); |
2923 | NewGV->setComdat(ComdatList[ComdatID - 1]); |
2924 | } |
2925 | } else if (hasImplicitComdat(RawLinkage)) { |
2926 | NewGV->setComdat(reinterpret_cast<Comdat *>(1)); |
2927 | } |
2928 | |
2929 | if (Record.size() > 12) { |
2930 | auto AS = getAttributes(Record[12]).getFnAttributes(); |
2931 | NewGV->setAttributes(AS); |
2932 | } |
2933 | |
2934 | if (Record.size() > 13) { |
2935 | NewGV->setDSOLocal(getDecodedDSOLocal(Record[13])); |
2936 | } |
2937 | inferDSOLocal(NewGV); |
2938 | |
2939 | return Error::success(); |
2940 | } |
2941 | |
2942 | Error BitcodeReader::parseFunctionRecord(ArrayRef<uint64_t> Record) { |
2943 | // v1: [type, callingconv, isproto, linkage, paramattr, alignment, section, |
2944 | // visibility, gc, unnamed_addr, prologuedata, dllstorageclass, comdat, |
2945 | // prefixdata, personalityfn, preemption specifier, addrspace] (name in VST) |
2946 | // v2: [strtab_offset, strtab_size, v1] |
2947 | StringRef Name; |
2948 | std::tie(Name, Record) = readNameFromStrtab(Record); |
2949 | |
2950 | if (Record.size() < 8) |
2951 | return error("Invalid record"); |
2952 | Type *Ty = getTypeByID(Record[0]); |
2953 | if (!Ty) |
2954 | return error("Invalid record"); |
2955 | if (auto *PTy = dyn_cast<PointerType>(Ty)) |
2956 | Ty = PTy->getElementType(); |
2957 | auto *FTy = dyn_cast<FunctionType>(Ty); |
2958 | if (!FTy) |
2959 | return error("Invalid type for value"); |
2960 | auto CC = static_cast<CallingConv::ID>(Record[1]); |
2961 | if (CC & ~CallingConv::MaxID) |
2962 | return error("Invalid calling convention ID"); |
2963 | |
2964 | unsigned AddrSpace = TheModule->getDataLayout().getProgramAddressSpace(); |
2965 | if (Record.size() > 16) |
2966 | AddrSpace = Record[16]; |
2967 | |
2968 | Function *Func = Function::Create(FTy, GlobalValue::ExternalLinkage, |
2969 | AddrSpace, Name, TheModule); |
2970 | |
2971 | Func->setCallingConv(CC); |
2972 | bool isProto = Record[2]; |
2973 | uint64_t RawLinkage = Record[3]; |
2974 | Func->setLinkage(getDecodedLinkage(RawLinkage)); |
2975 | Func->setAttributes(getAttributes(Record[4])); |
2976 | |
2977 | unsigned Alignment; |
2978 | if (Error Err = parseAlignmentValue(Record[5], Alignment)) |
2979 | return Err; |
2980 | Func->setAlignment(Alignment); |
2981 | if (Record[6]) { |
2982 | if (Record[6] - 1 >= SectionTable.size()) |
2983 | return error("Invalid ID"); |
2984 | Func->setSection(SectionTable[Record[6] - 1]); |
2985 | } |
2986 | // Local linkage must have default visibility. |
2987 | if (!Func->hasLocalLinkage()) |
2988 | // FIXME: Change to an error if non-default in 4.0. |
2989 | Func->setVisibility(getDecodedVisibility(Record[7])); |
2990 | if (Record.size() > 8 && Record[8]) { |
2991 | if (Record[8] - 1 >= GCTable.size()) |
2992 | return error("Invalid ID"); |
2993 | Func->setGC(GCTable[Record[8] - 1]); |
2994 | } |
2995 | GlobalValue::UnnamedAddr UnnamedAddr = GlobalValue::UnnamedAddr::None; |
2996 | if (Record.size() > 9) |
2997 | UnnamedAddr = getDecodedUnnamedAddrType(Record[9]); |
2998 | Func->setUnnamedAddr(UnnamedAddr); |
2999 | if (Record.size() > 10 && Record[10] != 0) |
3000 | FunctionPrologues.push_back(std::make_pair(Func, Record[10] - 1)); |
3001 | |
3002 | if (Record.size() > 11) |
3003 | Func->setDLLStorageClass(getDecodedDLLStorageClass(Record[11])); |
3004 | else |
3005 | upgradeDLLImportExportLinkage(Func, RawLinkage); |
3006 | |
3007 | if (Record.size() > 12) { |
3008 | if (unsigned ComdatID = Record[12]) { |
3009 | if (ComdatID > ComdatList.size()) |
3010 | return error("Invalid function comdat ID"); |
3011 | Func->setComdat(ComdatList[ComdatID - 1]); |
3012 | } |
3013 | } else if (hasImplicitComdat(RawLinkage)) { |
3014 | Func->setComdat(reinterpret_cast<Comdat *>(1)); |
3015 | } |
3016 | |
3017 | if (Record.size() > 13 && Record[13] != 0) |
3018 | FunctionPrefixes.push_back(std::make_pair(Func, Record[13] - 1)); |
3019 | |
3020 | if (Record.size() > 14 && Record[14] != 0) |
3021 | FunctionPersonalityFns.push_back(std::make_pair(Func, Record[14] - 1)); |
3022 | |
3023 | if (Record.size() > 15) { |
3024 | Func->setDSOLocal(getDecodedDSOLocal(Record[15])); |
3025 | } |
3026 | inferDSOLocal(Func); |
3027 | |
3028 | ValueList.push_back(Func); |
3029 | |
3030 | // If this is a function with a body, remember the prototype we are |
3031 | // creating now, so that we can match up the body with them later. |
3032 | if (!isProto) { |
3033 | Func->setIsMaterializable(true); |
3034 | FunctionsWithBodies.push_back(Func); |
3035 | DeferredFunctionInfo[Func] = 0; |
3036 | } |
3037 | return Error::success(); |
3038 | } |
3039 | |
3040 | Error BitcodeReader::parseGlobalIndirectSymbolRecord( |
3041 | unsigned BitCode, ArrayRef<uint64_t> Record) { |
3042 | // v1 ALIAS_OLD: [alias type, aliasee val#, linkage] (name in VST) |
3043 | // v1 ALIAS: [alias type, addrspace, aliasee val#, linkage, visibility, |
3044 | // dllstorageclass, threadlocal, unnamed_addr, |
3045 | // preemption specifier] (name in VST) |
3046 | // v1 IFUNC: [alias type, addrspace, aliasee val#, linkage, |
3047 | // visibility, dllstorageclass, threadlocal, unnamed_addr, |
3048 | // preemption specifier] (name in VST) |
3049 | // v2: [strtab_offset, strtab_size, v1] |
3050 | StringRef Name; |
3051 | std::tie(Name, Record) = readNameFromStrtab(Record); |
3052 | |
3053 | bool NewRecord = BitCode != bitc::MODULE_CODE_ALIAS_OLD; |
3054 | if (Record.size() < (3 + (unsigned)NewRecord)) |
3055 | return error("Invalid record"); |
3056 | unsigned OpNum = 0; |
3057 | Type *Ty = getTypeByID(Record[OpNum++]); |
3058 | if (!Ty) |
3059 | return error("Invalid record"); |
3060 | |
3061 | unsigned AddrSpace; |
3062 | if (!NewRecord) { |
3063 | auto *PTy = dyn_cast<PointerType>(Ty); |
3064 | if (!PTy) |
3065 | return error("Invalid type for value"); |
3066 | Ty = PTy->getElementType(); |
3067 | AddrSpace = PTy->getAddressSpace(); |
3068 | } else { |
3069 | AddrSpace = Record[OpNum++]; |
3070 | } |
3071 | |
3072 | auto Val = Record[OpNum++]; |
3073 | auto Linkage = Record[OpNum++]; |
3074 | GlobalIndirectSymbol *NewGA; |
3075 | if (BitCode == bitc::MODULE_CODE_ALIAS || |
3076 | BitCode == bitc::MODULE_CODE_ALIAS_OLD) |
3077 | NewGA = GlobalAlias::create(Ty, AddrSpace, getDecodedLinkage(Linkage), Name, |
3078 | TheModule); |
3079 | else |
3080 | NewGA = GlobalIFunc::create(Ty, AddrSpace, getDecodedLinkage(Linkage), Name, |
3081 | nullptr, TheModule); |
3082 | // Old bitcode files didn't have visibility field. |
3083 | // Local linkage must have default visibility. |
3084 | if (OpNum != Record.size()) { |
3085 | auto VisInd = OpNum++; |
3086 | if (!NewGA->hasLocalLinkage()) |
3087 | // FIXME: Change to an error if non-default in 4.0. |
3088 | NewGA->setVisibility(getDecodedVisibility(Record[VisInd])); |
3089 | } |
3090 | if (BitCode == bitc::MODULE_CODE_ALIAS || |
3091 | BitCode == bitc::MODULE_CODE_ALIAS_OLD) { |
3092 | if (OpNum != Record.size()) |
3093 | NewGA->setDLLStorageClass(getDecodedDLLStorageClass(Record[OpNum++])); |
3094 | else |
3095 | upgradeDLLImportExportLinkage(NewGA, Linkage); |
3096 | if (OpNum != Record.size()) |
3097 | NewGA->setThreadLocalMode(getDecodedThreadLocalMode(Record[OpNum++])); |
3098 | if (OpNum != Record.size()) |
3099 | NewGA->setUnnamedAddr(getDecodedUnnamedAddrType(Record[OpNum++])); |
3100 | } |
3101 | if (OpNum != Record.size()) |
3102 | NewGA->setDSOLocal(getDecodedDSOLocal(Record[OpNum++])); |
3103 | inferDSOLocal(NewGA); |
3104 | |
3105 | ValueList.push_back(NewGA); |
3106 | IndirectSymbolInits.push_back(std::make_pair(NewGA, Val)); |
3107 | return Error::success(); |
3108 | } |
3109 | |
3110 | Error BitcodeReader::parseModule(uint64_t ResumeBit, |
3111 | bool ShouldLazyLoadMetadata) { |
3112 | if (ResumeBit) |
3113 | Stream.JumpToBit(ResumeBit); |
3114 | else if (Stream.EnterSubBlock(bitc::MODULE_BLOCK_ID)) |
3115 | return error("Invalid record"); |
3116 | |
3117 | SmallVector<uint64_t, 64> Record; |
3118 | |
3119 | // Read all the records for this module. |
3120 | while (true) { |
3121 | BitstreamEntry Entry = Stream.advance(); |
3122 | |
3123 | switch (Entry.Kind) { |
3124 | case BitstreamEntry::Error: |
3125 | return error("Malformed block"); |
3126 | case BitstreamEntry::EndBlock: |
3127 | return globalCleanup(); |
3128 | |
3129 | case BitstreamEntry::SubBlock: |
3130 | switch (Entry.ID) { |
3131 | default: // Skip unknown content. |
3132 | if (Stream.SkipBlock()) |
3133 | return error("Invalid record"); |
3134 | break; |
3135 | case bitc::BLOCKINFO_BLOCK_ID: |
3136 | if (readBlockInfo()) |
3137 | return error("Malformed block"); |
3138 | break; |
3139 | case bitc::PARAMATTR_BLOCK_ID: |
3140 | if (Error Err = parseAttributeBlock()) |
3141 | return Err; |
3142 | break; |
3143 | case bitc::PARAMATTR_GROUP_BLOCK_ID: |
3144 | if (Error Err = parseAttributeGroupBlock()) |
3145 | return Err; |
3146 | break; |
3147 | case bitc::TYPE_BLOCK_ID_NEW: |
3148 | if (Error Err = parseTypeTable()) |
3149 | return Err; |
3150 | break; |
3151 | case bitc::VALUE_SYMTAB_BLOCK_ID: |
3152 | if (!SeenValueSymbolTable) { |
3153 | // Either this is an old form VST without function index and an |
3154 | // associated VST forward declaration record (which would have caused |
3155 | // the VST to be jumped to and parsed before it was encountered |
3156 | // normally in the stream), or there were no function blocks to |
3157 | // trigger an earlier parsing of the VST. |
3158 | assert(VSTOffset == 0 || FunctionsWithBodies.empty())((VSTOffset == 0 || FunctionsWithBodies.empty()) ? static_cast <void> (0) : __assert_fail ("VSTOffset == 0 || FunctionsWithBodies.empty()" , "/build/llvm-toolchain-snapshot-8~svn345461/lib/Bitcode/Reader/BitcodeReader.cpp" , 3158, __PRETTY_FUNCTION__)); |
3159 | if (Error Err = parseValueSymbolTable()) |
3160 | return Err; |
3161 | SeenValueSymbolTable = true; |
3162 | } else { |
3163 | // We must have had a VST forward declaration record, which caused |
3164 | // the parser to jump to and parse the VST earlier. |
3165 | assert(VSTOffset > 0)((VSTOffset > 0) ? static_cast<void> (0) : __assert_fail ("VSTOffset > 0", "/build/llvm-toolchain-snapshot-8~svn345461/lib/Bitcode/Reader/BitcodeReader.cpp" , 3165, __PRETTY_FUNCTION__)); |
3166 | if (Stream.SkipBlock()) |
3167 | return error("Invalid record"); |
3168 | } |
3169 | break; |
3170 | case bitc::CONSTANTS_BLOCK_ID: |
3171 | if (Error Err = parseConstants()) |
3172 | return Err; |
3173 | if (Error Err = resolveGlobalAndIndirectSymbolInits()) |
3174 | return Err; |
3175 | break; |
3176 | case bitc::METADATA_BLOCK_ID: |
3177 | if (ShouldLazyLoadMetadata) { |
3178 | if (Error Err = rememberAndSkipMetadata()) |
3179 | return Err; |
3180 | break; |
3181 | } |
3182 | assert(DeferredMetadataInfo.empty() && "Unexpected deferred metadata")((DeferredMetadataInfo.empty() && "Unexpected deferred metadata" ) ? static_cast<void> (0) : __assert_fail ("DeferredMetadataInfo.empty() && \"Unexpected deferred metadata\"" , "/build/llvm-toolchain-snapshot-8~svn345461/lib/Bitcode/Reader/BitcodeReader.cpp" , 3182, __PRETTY_FUNCTION__)); |
3183 | if (Error Err = MDLoader->parseModuleMetadata()) |
3184 | return Err; |
3185 | break; |
3186 | case bitc::METADATA_KIND_BLOCK_ID: |
3187 | if (Error Err = MDLoader->parseMetadataKinds()) |
3188 | return Err; |
3189 | break; |
3190 | case bitc::FUNCTION_BLOCK_ID: |
3191 | // If this is the first function body we've seen, reverse the |
3192 | // FunctionsWithBodies list. |
3193 | if (!SeenFirstFunctionBody) { |
3194 | std::reverse(FunctionsWithBodies.begin(), FunctionsWithBodies.end()); |
3195 | if (Error Err = globalCleanup()) |
3196 | return Err; |
3197 | SeenFirstFunctionBody = true; |
3198 | } |
3199 | |
3200 | if (VSTOffset > 0) { |
3201 | // If we have a VST forward declaration record, make sure we |
3202 | // parse the VST now if we haven't already. It is needed to |
3203 | // set up the DeferredFunctionInfo vector for lazy reading. |
3204 | if (!SeenValueSymbolTable) { |
3205 | if (Error Err = BitcodeReader::parseValueSymbolTable(VSTOffset)) |
3206 | return Err; |
3207 | SeenValueSymbolTable = true; |
3208 | // Fall through so that we record the NextUnreadBit below. |
3209 | // This is necessary in case we have an anonymous function that |
3210 | // is later materialized. Since it will not have a VST entry we |
3211 | // need to fall back to the lazy parse to find its offset. |
3212 | } else { |
3213 | // If we have a VST forward declaration record, but have already |
3214 | // parsed the VST (just above, when the first function body was |
3215 | // encountered here), then we are resuming the parse after |
3216 | // materializing functions. The ResumeBit points to the |
3217 | // start of the last function block recorded in the |
3218 | // DeferredFunctionInfo map. Skip it. |
3219 | if (Stream.SkipBlock()) |
3220 | return error("Invalid record"); |
3221 | continue; |
3222 | } |
3223 | } |
3224 | |
3225 | // Support older bitcode files that did not have the function |
3226 | // index in the VST, nor a VST forward declaration record, as |
3227 | // well as anonymous functions that do not have VST entries. |
3228 | // Build the DeferredFunctionInfo vector on the fly. |
3229 | if (Error Err = rememberAndSkipFunctionBody()) |
3230 | return Err; |
3231 | |
3232 | // Suspend parsing when we reach the function bodies. Subsequent |
3233 | // materialization calls will resume it when necessary. If the bitcode |
3234 | // file is old, the symbol table will be at the end instead and will not |
3235 | // have been seen yet. In this case, just finish the parse now. |
3236 | if (SeenValueSymbolTable) { |
3237 | NextUnreadBit = Stream.GetCurrentBitNo(); |
3238 | // After the VST has been parsed, we need to make sure intrinsic name |
3239 | // are auto-upgraded. |
3240 | return globalCleanup(); |
3241 | } |
3242 | break; |
3243 | case bitc::USELIST_BLOCK_ID: |
3244 | if (Error Err = parseUseLists()) |
3245 | return Err; |
3246 | break; |
3247 | case bitc::OPERAND_BUNDLE_TAGS_BLOCK_ID: |
3248 | if (Error Err = parseOperandBundleTags()) |
3249 | return Err; |
3250 | break; |
3251 | case bitc::SYNC_SCOPE_NAMES_BLOCK_ID: |
3252 | if (Error Err = parseSyncScopeNames()) |
3253 | return Err; |
3254 | break; |
3255 | } |
3256 | continue; |
3257 | |
3258 | case BitstreamEntry::Record: |
3259 | // The interesting case. |
3260 | break; |
3261 | } |
3262 | |
3263 | // Read a record. |
3264 | auto BitCode = Stream.readRecord(Entry.ID, Record); |
3265 | switch (BitCode) { |
3266 | default: break; // Default behavior, ignore unknown content. |
3267 | case bitc::MODULE_CODE_VERSION: { |
3268 | Expected<unsigned> VersionOrErr = parseVersionRecord(Record); |
3269 | if (!VersionOrErr) |
3270 | return VersionOrErr.takeError(); |
3271 | UseRelativeIDs = *VersionOrErr >= 1; |
3272 | break; |
3273 | } |
3274 | case bitc::MODULE_CODE_TRIPLE: { // TRIPLE: [strchr x N] |
3275 | std::string S; |
3276 | if (convertToString(Record, 0, S)) |
3277 | return error("Invalid record"); |
3278 | TheModule->setTargetTriple(S); |
3279 | break; |
3280 | } |
3281 | case bitc::MODULE_CODE_DATALAYOUT: { // DATALAYOUT: [strchr x N] |
3282 | std::string S; |
3283 | if (convertToString(Record, 0, S)) |
3284 | return error("Invalid record"); |
3285 | TheModule->setDataLayout(S); |
3286 | break; |
3287 | } |
3288 | case bitc::MODULE_CODE_ASM: { // ASM: [strchr x N] |
3289 | std::string S; |
3290 | if (convertToString(Record, 0, S)) |
3291 | return error("Invalid record"); |
3292 | TheModule->setModuleInlineAsm(S); |
3293 | break; |
3294 | } |
3295 | case bitc::MODULE_CODE_DEPLIB: { // DEPLIB: [strchr x N] |
3296 | // FIXME: Remove in 4.0. |
3297 | std::string S; |
3298 | if (convertToString(Record, 0, S)) |
3299 | return error("Invalid record"); |
3300 | // Ignore value. |
3301 | break; |
3302 | } |
3303 | case bitc::MODULE_CODE_SECTIONNAME: { // SECTIONNAME: [strchr x N] |
3304 | std::string S; |
3305 | if (convertToString(Record, 0, S)) |
3306 | return error("Invalid record"); |
3307 | SectionTable.push_back(S); |
3308 | break; |
3309 | } |
3310 | case bitc::MODULE_CODE_GCNAME: { // SECTIONNAME: [strchr x N] |
3311 | std::string S; |
3312 | if (convertToString(Record, 0, S)) |
3313 | return error("Invalid record"); |
3314 | GCTable.push_back(S); |
3315 | break; |
3316 | } |
3317 | case bitc::MODULE_CODE_COMDAT: |
3318 | if (Error Err = parseComdatRecord(Record)) |
3319 | return Err; |
3320 | break; |
3321 | case bitc::MODULE_CODE_GLOBALVAR: |
3322 | if (Error Err = parseGlobalVarRecord(Record)) |
3323 | return Err; |
3324 | break; |
3325 | case bitc::MODULE_CODE_FUNCTION: |
3326 | if (Error Err = parseFunctionRecord(Record)) |
3327 | return Err; |
3328 | break; |
3329 | case bitc::MODULE_CODE_IFUNC: |
3330 | case bitc::MODULE_CODE_ALIAS: |
3331 | case bitc::MODULE_CODE_ALIAS_OLD: |
3332 | if (Error Err = parseGlobalIndirectSymbolRecord(BitCode, Record)) |
3333 | return Err; |
3334 | break; |
3335 | /// MODULE_CODE_VSTOFFSET: [offset] |
3336 | case bitc::MODULE_CODE_VSTOFFSET: |
3337 | if (Record.size() < 1) |
3338 | return error("Invalid record"); |
3339 | // Note that we subtract 1 here because the offset is relative to one word |
3340 | // before the start of the identification or module block, which was |
3341 | // historically always the start of the regular bitcode header. |
3342 | VSTOffset = Record[0] - 1; |
3343 | break; |
3344 | /// MODULE_CODE_SOURCE_FILENAME: [namechar x N] |
3345 | case bitc::MODULE_CODE_SOURCE_FILENAME: |
3346 | SmallString<128> ValueName; |
3347 | if (convertToString(Record, 0, ValueName)) |
3348 | return error("Invalid record"); |
3349 | TheModule->setSourceFileName(ValueName); |
3350 | break; |
3351 | } |
3352 | Record.clear(); |
3353 | } |
3354 | } |
3355 | |
3356 | Error BitcodeReader::parseBitcodeInto(Module *M, bool ShouldLazyLoadMetadata, |
3357 | bool IsImporting) { |
3358 | TheModule = M; |
3359 | MDLoader = MetadataLoader(Stream, *M, ValueList, IsImporting, |
3360 | [&](unsigned ID) { return getTypeByID(ID); }); |
3361 | return parseModule(0, ShouldLazyLoadMetadata); |
3362 | } |
3363 | |
3364 | Error BitcodeReader::typeCheckLoadStoreInst(Type *ValType, Type *PtrType) { |
3365 | if (!isa<PointerType>(PtrType)) |
3366 | return error("Load/Store operand is not a pointer type"); |
3367 | Type *ElemType = cast<PointerType>(PtrType)->getElementType(); |
3368 | |
3369 | if (ValType && ValType != ElemType) |
3370 | return error("Explicit load/store type does not match pointee " |
3371 | "type of pointer operand"); |
3372 | if (!PointerType::isLoadableOrStorableType(ElemType)) |
3373 | return error("Cannot load/store from pointer"); |
3374 | return Error::success(); |
3375 | } |
3376 | |
3377 | /// Lazily parse the specified function body block. |
3378 | Error BitcodeReader::parseFunctionBody(Function *F) { |
3379 | if (Stream.EnterSubBlock(bitc::FUNCTION_BLOCK_ID)) |
3380 | return error("Invalid record"); |
3381 | |
3382 | // Unexpected unresolved metadata when parsing function. |
3383 | if (MDLoader->hasFwdRefs()) |
3384 | return error("Invalid function metadata: incoming forward references"); |
3385 | |
3386 | InstructionList.clear(); |
3387 | unsigned ModuleValueListSize = ValueList.size(); |
3388 | unsigned ModuleMDLoaderSize = MDLoader->size(); |
3389 | |
3390 | // Add all the function arguments to the value table. |
3391 | for (Argument &I : F->args()) |
3392 | ValueList.push_back(&I); |
3393 | |
3394 | unsigned NextValueNo = ValueList.size(); |
3395 | BasicBlock *CurBB = nullptr; |
3396 | unsigned CurBBNo = 0; |
3397 | |
3398 | DebugLoc LastLoc; |
3399 | auto getLastInstruction = [&]() -> Instruction * { |
3400 | if (CurBB && !CurBB->empty()) |
3401 | return &CurBB->back(); |
3402 | else if (CurBBNo && FunctionBBs[CurBBNo - 1] && |
3403 | !FunctionBBs[CurBBNo - 1]->empty()) |
3404 | return &FunctionBBs[CurBBNo - 1]->back(); |
3405 | return nullptr; |
3406 | }; |
3407 | |
3408 | std::vector<OperandBundleDef> OperandBundles; |
3409 | |
3410 | // Read all the records. |
3411 | SmallVector<uint64_t, 64> Record; |
3412 | |
3413 | while (true) { |
3414 | BitstreamEntry Entry = Stream.advance(); |
3415 | |
3416 | switch (Entry.Kind) { |
3417 | case BitstreamEntry::Error: |
3418 | return error("Malformed block"); |
3419 | case BitstreamEntry::EndBlock: |
3420 | goto OutOfRecordLoop; |
3421 | |
3422 | case BitstreamEntry::SubBlock: |
3423 | switch (Entry.ID) { |
3424 | default: // Skip unknown content. |
3425 | if (Stream.SkipBlock()) |
3426 | return error("Invalid record"); |
3427 | break; |
3428 | case bitc::CONSTANTS_BLOCK_ID: |
3429 | if (Error Err = parseConstants()) |
3430 | return Err; |
3431 | NextValueNo = ValueList.size(); |
3432 | break; |
3433 | case bitc::VALUE_SYMTAB_BLOCK_ID: |
3434 | if (Error Err = parseValueSymbolTable()) |
3435 | return Err; |
3436 | break; |
3437 | case bitc::METADATA_ATTACHMENT_ID: |
3438 | if (Error Err = MDLoader->parseMetadataAttachment(*F, InstructionList)) |
3439 | return Err; |
3440 | break; |
3441 | case bitc::METADATA_BLOCK_ID: |
3442 | 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\"" , "/build/llvm-toolchain-snapshot-8~svn345461/lib/Bitcode/Reader/BitcodeReader.cpp" , 3443, __PRETTY_FUNCTION__)) |
3443 | "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\"" , "/build/llvm-toolchain-snapshot-8~svn345461/lib/Bitcode/Reader/BitcodeReader.cpp" , 3443, __PRETTY_FUNCTION__)); |
3444 | if (Error Err = MDLoader->parseFunctionMetadata()) |
3445 | return Err; |
3446 | break; |
3447 | case bitc::USELIST_BLOCK_ID: |
3448 | if (Error Err = parseUseLists()) |
3449 | return Err; |
3450 | break; |
3451 | } |
3452 | continue; |
3453 | |
3454 | case BitstreamEntry::Record: |
3455 | // The interesting case. |
3456 | break; |
3457 | } |
3458 | |
3459 | // Read a record. |
3460 | Record.clear(); |
3461 | Instruction *I = nullptr; |
3462 | unsigned BitCode = Stream.readRecord(Entry.ID, Record); |
3463 | switch (BitCode) { |
3464 | default: // Default behavior: reject |
3465 | return error("Invalid value"); |
3466 | case bitc::FUNC_CODE_DECLAREBLOCKS: { // DECLAREBLOCKS: [nblocks] |
3467 | if (Record.size() < 1 || Record[0] == 0) |
3468 | return error("Invalid record"); |
3469 | // Create all the basic blocks for the function. |
3470 | FunctionBBs.resize(Record[0]); |
3471 | |
3472 | // See if anything took the address of blocks in this function. |
3473 | auto BBFRI = BasicBlockFwdRefs.find(F); |
3474 | if (BBFRI == BasicBlockFwdRefs.end()) { |
3475 | for (unsigned i = 0, e = FunctionBBs.size(); i != e; ++i) |
3476 | FunctionBBs[i] = BasicBlock::Create(Context, "", F); |
3477 | } else { |
3478 | auto &BBRefs = BBFRI->second; |
3479 | // Check for invalid basic block references. |
3480 | if (BBRefs.size() > FunctionBBs.size()) |
3481 | return error("Invalid ID"); |
3482 | assert(!BBRefs.empty() && "Unexpected empty array")((!BBRefs.empty() && "Unexpected empty array") ? static_cast <void> (0) : __assert_fail ("!BBRefs.empty() && \"Unexpected empty array\"" , "/build/llvm-toolchain-snapshot-8~svn345461/lib/Bitcode/Reader/BitcodeReader.cpp" , 3482, __PRETTY_FUNCTION__)); |
3483 | 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\"" , "/build/llvm-toolchain-snapshot-8~svn345461/lib/Bitcode/Reader/BitcodeReader.cpp" , 3483, __PRETTY_FUNCTION__)); |
3484 | for (unsigned I = 0, E = FunctionBBs.size(), RE = BBRefs.size(); I != E; |
3485 | ++I) |
3486 | if (I < RE && BBRefs[I]) { |
3487 | BBRefs[I]->insertInto(F); |
3488 | FunctionBBs[I] = BBRefs[I]; |
3489 | } else { |
3490 | FunctionBBs[I] = BasicBlock::Create(Context, "", F); |
3491 | } |
3492 | |
3493 | // Erase from the table. |
3494 | BasicBlockFwdRefs.erase(BBFRI); |
3495 | } |
3496 | |
3497 | CurBB = FunctionBBs[0]; |
3498 | continue; |
3499 | } |
3500 | |
3501 | case bitc::FUNC_CODE_DEBUG_LOC_AGAIN: // DEBUG_LOC_AGAIN |
3502 | // This record indicates that the last instruction is at the same |
3503 | // location as the previous instruction with a location. |
3504 | I = getLastInstruction(); |
3505 | |
3506 | if (!I) |
3507 | return error("Invalid record"); |
3508 | I->setDebugLoc(LastLoc); |
3509 | I = nullptr; |
3510 | continue; |
3511 | |
3512 | case bitc::FUNC_CODE_DEBUG_LOC: { // DEBUG_LOC: [line, col, scope, ia] |
3513 | I = getLastInstruction(); |
3514 | if (!I || Record.size() < 4) |
3515 | return error("Invalid record"); |
3516 | |
3517 | unsigned Line = Record[0], Col = Record[1]; |
3518 | unsigned ScopeID = Record[2], IAID = Record[3]; |
3519 | bool isImplicitCode = Record.size() == 5 && Record[4]; |
3520 | |
3521 | MDNode *Scope = nullptr, *IA = nullptr; |
3522 | if (ScopeID) { |
3523 | Scope = MDLoader->getMDNodeFwdRefOrNull(ScopeID - 1); |
3524 | if (!Scope) |
3525 | return error("Invalid record"); |
3526 | } |
3527 | if (IAID) { |
3528 | IA = MDLoader->getMDNodeFwdRefOrNull(IAID - 1); |
3529 | if (!IA) |
3530 | return error("Invalid record"); |
3531 | } |
3532 | LastLoc = DebugLoc::get(Line, Col, Scope, IA, isImplicitCode); |
3533 | I->setDebugLoc(LastLoc); |
3534 | I = nullptr; |
3535 | continue; |
3536 | } |
3537 | |
3538 | case bitc::FUNC_CODE_INST_BINOP: { // BINOP: [opval, ty, opval, opcode] |
3539 | unsigned OpNum = 0; |
3540 | Value *LHS, *RHS; |
3541 | if (getValueTypePair(Record, OpNum, NextValueNo, LHS) || |
3542 | popValue(Record, OpNum, NextValueNo, LHS->getType(), RHS) || |
3543 | OpNum+1 > Record.size()) |
3544 | return error("Invalid record"); |
3545 | |
3546 | int Opc = getDecodedBinaryOpcode(Record[OpNum++], LHS->getType()); |
3547 | if (Opc == -1) |
3548 | return error("Invalid record"); |
3549 | I = BinaryOperator::Create((Instruction::BinaryOps)Opc, LHS, RHS); |
3550 | InstructionList.push_back(I); |
3551 | if (OpNum < Record.size()) { |
3552 | if (Opc == Instruction::Add || |
3553 | Opc == Instruction::Sub || |
3554 | Opc == Instruction::Mul || |
3555 | Opc == Instruction::Shl) { |
3556 | if (Record[OpNum] & (1 << bitc::OBO_NO_SIGNED_WRAP)) |
3557 | cast<BinaryOperator>(I)->setHasNoSignedWrap(true); |
3558 | if (Record[OpNum] & (1 << bitc::OBO_NO_UNSIGNED_WRAP)) |
3559 | cast<BinaryOperator>(I)->setHasNoUnsignedWrap(true); |
3560 | } else if (Opc == Instruction::SDiv || |
3561 | Opc == Instruction::UDiv || |
3562 | Opc == Instruction::LShr || |
3563 | Opc == Instruction::AShr) { |
3564 | if (Record[OpNum] & (1 << bitc::PEO_EXACT)) |
3565 | cast<BinaryOperator>(I)->setIsExact(true); |
3566 | } else if (isa<FPMathOperator>(I)) { |
3567 | FastMathFlags FMF = getDecodedFastMathFlags(Record[OpNum]); |
3568 | if (FMF.any()) |
3569 | I->setFastMathFlags(FMF); |
3570 | } |
3571 | |
3572 | } |
3573 | break; |
3574 | } |
3575 | case bitc::FUNC_CODE_INST_CAST: { // CAST: [opval, opty, destty, castopc] |
3576 | unsigned OpNum = 0; |
3577 | Value *Op; |
3578 | if (getValueTypePair(Record, OpNum, NextValueNo, Op) || |
3579 | OpNum+2 != Record.size()) |
3580 | return error("Invalid record"); |
3581 | |
3582 | Type *ResTy = getTypeByID(Record[OpNum]); |
3583 | int Opc = getDecodedCastOpcode(Record[OpNum + 1]); |
3584 | if (Opc == -1 || !ResTy) |
3585 | return error("Invalid record"); |
3586 | Instruction *Temp = nullptr; |
3587 | if ((I = UpgradeBitCastInst(Opc, Op, ResTy, Temp))) { |
3588 | if (Temp) { |
3589 | InstructionList.push_back(Temp); |
3590 | CurBB->getInstList().push_back(Temp); |
3591 | } |
3592 | } else { |
3593 | auto CastOp = (Instruction::CastOps)Opc; |
3594 | if (!CastInst::castIsValid(CastOp, Op, ResTy)) |
3595 | return error("Invalid cast"); |
3596 | I = CastInst::Create(CastOp, Op, ResTy); |
3597 | } |
3598 | InstructionList.push_back(I); |
3599 | break; |
3600 | } |
3601 | case bitc::FUNC_CODE_INST_INBOUNDS_GEP_OLD: |
3602 | case bitc::FUNC_CODE_INST_GEP_OLD: |
3603 | case bitc::FUNC_CODE_INST_GEP: { // GEP: type, [n x operands] |
3604 | unsigned OpNum = 0; |
3605 | |
3606 | Type *Ty; |
3607 | bool InBounds; |
3608 | |
3609 | if (BitCode == bitc::FUNC_CODE_INST_GEP) { |
3610 | InBounds = Record[OpNum++]; |
3611 | Ty = getTypeByID(Record[OpNum++]); |
3612 | } else { |
3613 | InBounds = BitCode == bitc::FUNC_CODE_INST_INBOUNDS_GEP_OLD; |
3614 | Ty = nullptr; |
3615 | } |
3616 | |
3617 | Value *BasePtr; |
3618 | if (getValueTypePair(Record, OpNum, NextValueNo, BasePtr)) |
3619 | return error("Invalid record"); |
3620 | |
3621 | if (!Ty) |
3622 | Ty = cast<PointerType>(BasePtr->getType()->getScalarType()) |
3623 | ->getElementType(); |
3624 | else if (Ty != |
3625 | cast<PointerType>(BasePtr->getType()->getScalarType()) |
3626 | ->getElementType()) |
3627 | return error( |
3628 | "Explicit gep type does not match pointee type of pointer operand"); |
3629 | |
3630 | SmallVector<Value*, 16> GEPIdx; |
3631 | while (OpNum != Record.size()) { |
3632 | Value *Op; |
3633 | if (getValueTypePair(Record, OpNum, NextValueNo, Op)) |
3634 | return error("Invalid record"); |
3635 | GEPIdx.push_back(Op); |
3636 | } |
3637 | |
3638 | I = GetElementPtrInst::Create(Ty, BasePtr, GEPIdx); |
3639 | |
3640 | InstructionList.push_back(I); |
3641 | if (InBounds) |
3642 | cast<GetElementPtrInst>(I)->setIsInBounds(true); |
3643 | break; |
3644 | } |
3645 | |
3646 | case bitc::FUNC_CODE_INST_EXTRACTVAL: { |
3647 | // EXTRACTVAL: [opty, opval, n x indices] |
3648 | unsigned OpNum = 0; |
3649 | Value *Agg; |
3650 | if (getValueTypePair(Record, OpNum, NextValueNo, Agg)) |
3651 | return error("Invalid record"); |
3652 | |
3653 | unsigned RecSize = Record.size(); |
3654 | if (OpNum == RecSize) |
3655 | return error("EXTRACTVAL: Invalid instruction with 0 indices"); |
3656 | |
3657 | SmallVector<unsigned, 4> EXTRACTVALIdx; |
3658 | Type *CurTy = Agg->getType(); |
3659 | for (; OpNum != RecSize; ++OpNum) { |
3660 | bool IsArray = CurTy->isArrayTy(); |
3661 | bool IsStruct = CurTy->isStructTy(); |
3662 | uint64_t Index = Record[OpNum]; |
3663 | |
3664 | if (!IsStruct && !IsArray) |
3665 | return error("EXTRACTVAL: Invalid type"); |
3666 | if ((unsigned)Index != Index) |
3667 | return error("Invalid value"); |
3668 | if (IsStruct && Index >= CurTy->subtypes().size()) |
3669 | return error("EXTRACTVAL: Invalid struct index"); |
3670 | if (IsArray && Index >= CurTy->getArrayNumElements()) |
3671 | return error("EXTRACTVAL: Invalid array index"); |
3672 | EXTRACTVALIdx.push_back((unsigned)Index); |
3673 | |
3674 | if (IsStruct) |
3675 | CurTy = CurTy->subtypes()[Index]; |
3676 | else |
3677 | CurTy = CurTy->subtypes()[0]; |
3678 | } |
3679 | |
3680 | I = ExtractValueInst::Create(Agg, EXTRACTVALIdx); |
3681 | InstructionList.push_back(I); |
3682 | break; |
3683 | } |
3684 | |
3685 | case bitc::FUNC_CODE_INST_INSERTVAL: { |
3686 | // INSERTVAL: [opty, opval, opty, opval, n x indices] |
3687 | unsigned OpNum = 0; |
3688 | Value *Agg; |
3689 | if (getValueTypePair(Record, OpNum, NextValueNo, Agg)) |
3690 | return error("Invalid record"); |
3691 | Value *Val; |
3692 | if (getValueTypePair(Record, OpNum, NextValueNo, Val)) |
3693 | return error("Invalid record"); |
3694 | |
3695 | unsigned RecSize = Record.size(); |
3696 | if (OpNum == RecSize) |
3697 | return error("INSERTVAL: Invalid instruction with 0 indices"); |
3698 | |
3699 | SmallVector<unsigned, 4> INSERTVALIdx; |
3700 | Type *CurTy = Agg->getType(); |
3701 | for (; OpNum != RecSize; ++OpNum) { |
3702 | bool IsArray = CurTy->isArrayTy(); |
3703 | bool IsStruct = CurTy->isStructTy(); |
3704 | uint64_t Index = Record[OpNum]; |
3705 | |
3706 | if (!IsStruct && !IsArray) |
3707 | return error("INSERTVAL: Invalid type"); |
3708 | if ((unsigned)Index != Index) |
3709 | return error("Invalid value"); |
3710 | if (IsStruct && Index >= CurTy->subtypes().size()) |
3711 | return error("INSERTVAL: Invalid struct index"); |
3712 | if (IsArray && Index >= CurTy->getArrayNumElements()) |
3713 | return error("INSERTVAL: Invalid array index"); |
3714 | |
3715 | INSERTVALIdx.push_back((unsigned)Index); |
3716 | if (IsStruct) |
3717 | CurTy = CurTy->subtypes()[Index]; |
3718 | else |
3719 | CurTy = CurTy->subtypes()[0]; |
3720 | } |
3721 | |
3722 | if (CurTy != Val->getType()) |
3723 | return error("Inserted value type doesn't match aggregate type"); |
3724 | |
3725 | I = InsertValueInst::Create(Agg, Val, INSERTVALIdx); |
3726 | InstructionList.push_back(I); |
3727 | break; |
3728 | } |
3729 | |
3730 | case bitc::FUNC_CODE_INST_SELECT: { // SELECT: [opval, ty, opval, opval] |
3731 | // obsolete form of select |
3732 | // handles select i1 ... in old bitcode |
3733 | unsigned OpNum = 0; |
3734 | Value *TrueVal, *FalseVal, *Cond; |
3735 | if (getValueTypePair(Record, OpNum, NextValueNo, TrueVal) || |
3736 | popValue(Record, OpNum, NextValueNo, TrueVal->getType(), FalseVal) || |
3737 | popValue(Record, OpNum, NextValueNo, Type::getInt1Ty(Context), Cond)) |
3738 | return error("Invalid record"); |
3739 | |
3740 | I = SelectInst::Create(Cond, TrueVal, FalseVal); |
3741 | InstructionList.push_back(I); |
3742 | break; |
3743 | } |
3744 | |
3745 | case bitc::FUNC_CODE_INST_VSELECT: {// VSELECT: [ty,opval,opval,predty,pred] |
3746 | // new form of select |
3747 | // handles select i1 or select [N x i1] |
3748 | unsigned OpNum = 0; |
3749 | Value *TrueVal, *FalseVal, *Cond; |
3750 | if (getValueTypePair(Record, OpNum, NextValueNo, TrueVal) || |
3751 | popValue(Record, OpNum, NextValueNo, TrueVal->getType(), FalseVal) || |
3752 | getValueTypePair(Record, OpNum, NextValueNo, Cond)) |
3753 | return error("Invalid record"); |
3754 | |
3755 | // select condition can be either i1 or [N x i1] |
3756 | if (VectorType* vector_type = |
3757 | dyn_cast<VectorType>(Cond->getType())) { |
3758 | // expect <n x i1> |
3759 | if (vector_type->getElementType() != Type::getInt1Ty(Context)) |
3760 | return error("Invalid type for value"); |
3761 | } else { |
3762 | // expect i1 |
3763 | if (Cond->getType() != Type::getInt1Ty(Context)) |
3764 | return error("Invalid type for value"); |
3765 | } |
3766 | |
3767 | I = SelectInst::Create(Cond, TrueVal, FalseVal); |
3768 | InstructionList.push_back(I); |
3769 | break; |
3770 | } |
3771 | |
3772 | case bitc::FUNC_CODE_INST_EXTRACTELT: { // EXTRACTELT: [opty, opval, opval] |
3773 | unsigned OpNum = 0; |
3774 | Value *Vec, *Idx; |
3775 | if (getValueTypePair(Record, OpNum, NextValueNo, Vec) || |
3776 | getValueTypePair(Record, OpNum, NextValueNo, Idx)) |
3777 | return error("Invalid record"); |
3778 | if (!Vec->getType()->isVectorTy()) |
3779 | return error("Invalid type for value"); |
3780 | I = ExtractElementInst::Create(Vec, Idx); |
3781 | InstructionList.push_back(I); |
3782 | break; |
3783 | } |
3784 | |
3785 | case bitc::FUNC_CODE_INST_INSERTELT: { // INSERTELT: [ty, opval,opval,opval] |
3786 | unsigned OpNum = 0; |
3787 | Value *Vec, *Elt, *Idx; |
3788 | if (getValueTypePair(Record, OpNum, NextValueNo, Vec)) |
3789 | return error("Invalid record"); |
3790 | if (!Vec->getType()->isVectorTy()) |
3791 | return error("Invalid type for value"); |
3792 | if (popValue(Record, OpNum, NextValueNo, |
3793 | cast<VectorType>(Vec->getType())->getElementType(), Elt) || |
3794 | getValueTypePair(Record, OpNum, NextValueNo, Idx)) |
3795 | return error("Invalid record"); |
3796 | I = InsertElementInst::Create(Vec, Elt, Idx); |
3797 | InstructionList.push_back(I); |
3798 | break; |
3799 | } |
3800 | |
3801 | case bitc::FUNC_CODE_INST_SHUFFLEVEC: {// SHUFFLEVEC: [opval,ty,opval,opval] |
3802 | unsigned OpNum = 0; |
3803 | Value *Vec1, *Vec2, *Mask; |
3804 | if (getValueTypePair(Record, OpNum, NextValueNo, Vec1) || |
3805 | popValue(Record, OpNum, NextValueNo, Vec1->getType(), Vec2)) |
3806 | return error("Invalid record"); |
3807 | |
3808 | if (getValueTypePair(Record, OpNum, NextValueNo, Mask)) |
3809 | return error("Invalid record"); |
3810 | if (!Vec1->getType()->isVectorTy() || !Vec2->getType()->isVectorTy()) |
3811 | return error("Invalid type for value"); |
3812 | I = new ShuffleVectorInst(Vec1, Vec2, Mask); |
3813 | InstructionList.push_back(I); |
3814 | break; |
3815 | } |
3816 | |
3817 | case bitc::FUNC_CODE_INST_CMP: // CMP: [opty, opval, opval, pred] |
3818 | // Old form of ICmp/FCmp returning bool |
3819 | // Existed to differentiate between icmp/fcmp and vicmp/vfcmp which were |
3820 | // both legal on vectors but had different behaviour. |
3821 | case bitc::FUNC_CODE_INST_CMP2: { // CMP2: [opty, opval, opval, pred] |
3822 | // FCmp/ICmp returning bool or vector of bool |
3823 | |
3824 | unsigned OpNum = 0; |
3825 | Value *LHS, *RHS; |
3826 | if (getValueTypePair(Record, OpNum, NextValueNo, LHS) || |
3827 | popValue(Record, OpNum, NextValueNo, LHS->getType(), RHS)) |
3828 | return error("Invalid record"); |
3829 | |
3830 | unsigned PredVal = Record[OpNum]; |
3831 | bool IsFP = LHS->getType()->isFPOrFPVectorTy(); |
3832 | FastMathFlags FMF; |
3833 | if (IsFP && Record.size() > OpNum+1) |
3834 | FMF = getDecodedFastMathFlags(Record[++OpNum]); |
3835 | |
3836 | if (OpNum+1 != Record.size()) |
3837 | return error("Invalid record"); |
3838 | |
3839 | if (LHS->getType()->isFPOrFPVectorTy()) |
3840 | I = new FCmpInst((FCmpInst::Predicate)PredVal, LHS, RHS); |
3841 | else |
3842 | I = new ICmpInst((ICmpInst::Predicate)PredVal, LHS, RHS); |
3843 | |
3844 | if (FMF.any()) |
3845 | I->setFastMathFlags(FMF); |
3846 | InstructionList.push_back(I); |
3847 | break; |
3848 | } |
3849 | |
3850 | case bitc::FUNC_CODE_INST_RET: // RET: [opty,opval<optional>] |
3851 | { |
3852 | unsigned Size = Record.size(); |
3853 | if (Size == 0) { |
3854 | I = ReturnInst::Create(Context); |
3855 | InstructionList.push_back(I); |
3856 | break; |
3857 | } |
3858 | |
3859 | unsigned OpNum = 0; |
3860 | Value *Op = nullptr; |
3861 | if (getValueTypePair(Record, OpNum, NextValueNo, Op)) |
3862 | return error("Invalid record"); |
3863 | if (OpNum != Record.size()) |
3864 | return error("Invalid record"); |
3865 | |
3866 | I = ReturnInst::Create(Context, Op); |
3867 | InstructionList.push_back(I); |
3868 | break; |
3869 | } |
3870 | case bitc::FUNC_CODE_INST_BR: { // BR: [bb#, bb#, opval] or [bb#] |
3871 | if (Record.size() != 1 && Record.size() != 3) |
3872 | return error("Invalid record"); |
3873 | BasicBlock *TrueDest = getBasicBlock(Record[0]); |
3874 | if (!TrueDest) |
3875 | return error("Invalid record"); |
3876 | |
3877 | if (Record.size() == 1) { |
3878 | I = BranchInst::Create(TrueDest); |
3879 | InstructionList.push_back(I); |
3880 | } |
3881 | else { |
3882 | BasicBlock *FalseDest = getBasicBlock(Record[1]); |
3883 | Value *Cond = getValue(Record, 2, NextValueNo, |
3884 | Type::getInt1Ty(Context)); |
3885 | if (!FalseDest || !Cond) |
3886 | return error("Invalid record"); |
3887 | I = BranchInst::Create(TrueDest, FalseDest, Cond); |
3888 | InstructionList.push_back(I); |
3889 | } |
3890 | break; |
3891 | } |
3892 | case bitc::FUNC_CODE_INST_CLEANUPRET: { // CLEANUPRET: [val] or [val,bb#] |
3893 | if (Record.size() != 1 && Record.size() != 2) |
3894 | return error("Invalid record"); |
3895 | unsigned Idx = 0; |
3896 | Value *CleanupPad = |
3897 | getValue(Record, Idx++, NextValueNo, Type::getTokenTy(Context)); |
3898 | if (!CleanupPad) |
3899 | return error("Invalid record"); |
3900 | BasicBlock *UnwindDest = nullptr; |
3901 | if (Record.size() == 2) { |
3902 | UnwindDest = getBasicBlock(Record[Idx++]); |
3903 | if (!UnwindDest) |
3904 | return error("Invalid record"); |
3905 | } |
3906 | |
3907 | I = CleanupReturnInst::Create(CleanupPad, UnwindDest); |
3908 | InstructionList.push_back(I); |
3909 | break; |
3910 | } |
3911 | case bitc::FUNC_CODE_INST_CATCHRET: { // CATCHRET: [val,bb#] |
3912 | if (Record.size() != 2) |
3913 | return error("Invalid record"); |
3914 | unsigned Idx = 0; |
3915 | Value *CatchPad = |
3916 | getValue(Record, Idx++, NextValueNo, Type::getTokenTy(Context)); |
3917 | if (!CatchPad) |
3918 | return error("Invalid record"); |
3919 | BasicBlock *BB = getBasicBlock(Record[Idx++]); |
3920 | if (!BB) |
3921 | return error("Invalid record"); |
3922 | |
3923 | I = CatchReturnInst::Create(CatchPad, BB); |
3924 | InstructionList.push_back(I); |
3925 | break; |
3926 | } |
3927 | case bitc::FUNC_CODE_INST_CATCHSWITCH: { // CATCHSWITCH: [tok,num,(bb)*,bb?] |
3928 | // We must have, at minimum, the outer scope and the number of arguments. |
3929 | if (Record.size() < 2) |
3930 | return error("Invalid record"); |
3931 | |
3932 | unsigned Idx = 0; |
3933 | |
3934 | Value *ParentPad = |
3935 | getValue(Record, Idx++, NextValueNo, Type::getTokenTy(Context)); |
3936 | |
3937 | unsigned NumHandlers = Record[Idx++]; |
3938 | |
3939 | SmallVector<BasicBlock *, 2> Handlers; |
3940 | for (unsigned Op = 0; Op != NumHandlers; ++Op) { |
3941 | BasicBlock *BB = getBasicBlock(Record[Idx++]); |
3942 | if (!BB) |
3943 | return error("Invalid record"); |
3944 | Handlers.push_back(BB); |
3945 | } |
3946 | |
3947 | BasicBlock *UnwindDest = nullptr; |
3948 | if (Idx + 1 == Record.size()) { |
3949 | UnwindDest = getBasicBlock(Record[Idx++]); |
3950 | if (!UnwindDest) |
3951 | return error("Invalid record"); |
3952 | } |
3953 | |
3954 | if (Record.size() != Idx) |
3955 | return error("Invalid record"); |
3956 | |
3957 | auto *CatchSwitch = |
3958 | CatchSwitchInst::Create(ParentPad, UnwindDest, NumHandlers); |
3959 | for (BasicBlock *Handler : Handlers) |
3960 | CatchSwitch->addHandler(Handler); |
3961 | I = CatchSwitch; |
3962 | InstructionList.push_back(I); |
3963 | break; |
3964 | } |
3965 | case bitc::FUNC_CODE_INST_CATCHPAD: |
3966 | case bitc::FUNC_CODE_INST_CLEANUPPAD: { // [tok,num,(ty,val)*] |
3967 | // We must have, at minimum, the outer scope and the number of arguments. |
3968 | if (Record.size() < 2) |
3969 | return error("Invalid record"); |
3970 | |
3971 | unsigned Idx = 0; |
3972 | |
3973 | Value *ParentPad = |
3974 | getValue(Record, Idx++, NextValueNo, Type::getTokenTy(Context)); |
3975 | |
3976 | unsigned NumArgOperands = Record[Idx++]; |
3977 | |
3978 | SmallVector<Value *, 2> Args; |
3979 | for (unsigned Op = 0; Op != NumArgOperands; ++Op) { |
3980 | Value *Val; |
3981 | if (getValueTypePair(Record, Idx, NextValueNo, Val)) |
3982 | return error("Invalid record"); |
3983 | Args.push_back(Val); |
3984 | } |
3985 | |
3986 | if (Record.size() != Idx) |
3987 | return error("Invalid record"); |
3988 | |
3989 | if (BitCode == bitc::FUNC_CODE_INST_CLEANUPPAD) |
3990 | I = CleanupPadInst::Create(ParentPad, Args); |
3991 | else |
3992 | I = CatchPadInst::Create(ParentPad, Args); |
3993 | InstructionList.push_back(I); |
3994 | break; |
3995 | } |
3996 | case bitc::FUNC_CODE_INST_SWITCH: { // SWITCH: [opty, op0, op1, ...] |
3997 | // Check magic |
3998 | if ((Record[0] >> 16) == SWITCH_INST_MAGIC) { |
3999 | // "New" SwitchInst format with case ranges. The changes to write this |
4000 | // format were reverted but we still recognize bitcode that uses it. |
4001 | // Hopefully someday we will have support for case ranges and can use |
4002 | // this format again. |
4003 | |
4004 | Type *OpTy = getTypeByID(Record[1]); |
4005 | unsigned ValueBitWidth = cast<IntegerType>(OpTy)->getBitWidth(); |
4006 | |
4007 | Value *Cond = getValue(Record, 2, NextValueNo, OpTy); |
4008 | BasicBlock *Default = getBasicBlock(Record[3]); |
4009 | if (!OpTy || !Cond || !Default) |
4010 | return error("Invalid record"); |
4011 | |
4012 | unsigned NumCases = Record[4]; |
4013 | |
4014 | SwitchInst *SI = SwitchInst::Create(Cond, Default, NumCases); |
4015 | InstructionList.push_back(SI); |
4016 | |
4017 | unsigned CurIdx = 5; |
4018 | for (unsigned i = 0; i != NumCases; ++i) { |
4019 | SmallVector<ConstantInt*, 1> CaseVals; |
4020 | unsigned NumItems = Record[CurIdx++]; |
4021 | for (unsigned ci = 0; ci != NumItems; ++ci) { |
4022 | bool isSingleNumber = Record[CurIdx++]; |
4023 | |
4024 | APInt Low; |
4025 | unsigned ActiveWords = 1; |
4026 | if (ValueBitWidth > 64) |
4027 | ActiveWords = Record[CurIdx++]; |
4028 | Low = readWideAPInt(makeArrayRef(&Record[CurIdx], ActiveWords), |
4029 | ValueBitWidth); |
4030 | CurIdx += ActiveWords; |
4031 | |
4032 | if (!isSingleNumber) { |
4033 | ActiveWords = 1; |
4034 | if (ValueBitWidth > 64) |
4035 | ActiveWords = Record[CurIdx++]; |
4036 | APInt High = readWideAPInt( |
4037 | makeArrayRef(&Record[CurIdx], ActiveWords), ValueBitWidth); |
4038 | CurIdx += ActiveWords; |
4039 | |
4040 | // FIXME: It is not clear whether values in the range should be |
4041 | // compared as signed or unsigned values. The partially |
4042 | // implemented changes that used this format in the past used |
4043 | // unsigned comparisons. |
4044 | for ( ; Low.ule(High); ++Low) |
4045 | CaseVals.push_back(ConstantInt::get(Context, Low)); |
4046 | } else |
4047 | CaseVals.push_back(ConstantInt::get(Context, Low)); |
4048 | } |
4049 | BasicBlock *DestBB = getBasicBlock(Record[CurIdx++]); |
4050 | for (SmallVector<ConstantInt*, 1>::iterator cvi = CaseVals.begin(), |
4051 | cve = CaseVals.end(); cvi != cve; ++cvi) |
4052 | SI->addCase(*cvi, DestBB); |
4053 | } |
4054 | I = SI; |
4055 | break; |
4056 | } |
4057 | |
4058 | // Old SwitchInst format without case ranges. |
4059 | |
4060 | if (Record.size() < 3 || (Record.size() & 1) == 0) |
4061 | return error("Invalid record"); |
4062 | Type *OpTy = getTypeByID(Record[0]); |
4063 | Value *Cond = getValue(Record, 1, NextValueNo, OpTy); |
4064 | BasicBlock *Default = getBasicBlock(Record[2]); |
4065 | if (!OpTy || !Cond || !Default) |
4066 | return error("Invalid record"); |
4067 | unsigned NumCases = (Record.size()-3)/2; |
4068 | SwitchInst *SI = SwitchInst::Create(Cond, Default, NumCases); |
4069 | InstructionList.push_back(SI); |
4070 | for (unsigned i = 0, e = NumCases; i != e; ++i) { |
4071 | ConstantInt *CaseVal = |
4072 | dyn_cast_or_null<ConstantInt>(getFnValueByID(Record[3+i*2], OpTy)); |
4073 | BasicBlock *DestBB = getBasicBlock(Record[1+3+i*2]); |
4074 | if (!CaseVal || !DestBB) { |
4075 | delete SI; |
4076 | return error("Invalid record"); |
4077 | } |
4078 | SI->addCase(CaseVal, DestBB); |
4079 | } |
4080 | I = SI; |
4081 | break; |
4082 | } |
4083 | case bitc::FUNC_CODE_INST_INDIRECTBR: { // INDIRECTBR: [opty, op0, op1, ...] |
4084 | if (Record.size() < 2) |
4085 | return error("Invalid record"); |
4086 | Type *OpTy = getTypeByID(Record[0]); |
4087 | Value *Address = getValue(Record, 1, NextValueNo, OpTy); |
4088 | if (!OpTy || !Address) |
4089 | return error("Invalid record"); |
4090 | unsigned NumDests = Record.size()-2; |
4091 | IndirectBrInst *IBI = IndirectBrInst::Create(Address, NumDests); |
4092 | InstructionList.push_back(IBI); |
4093 | for (unsigned i = 0, e = NumDests; i != e; ++i) { |
4094 | if (BasicBlock *DestBB = getBasicBlock(Record[2+i])) { |
4095 | IBI->addDestination(DestBB); |
4096 | } else { |
4097 | delete IBI; |
4098 | return error("Invalid record"); |
4099 | } |
4100 | } |
4101 | I = IBI; |
4102 | break; |
4103 | } |
4104 | |
4105 | case bitc::FUNC_CODE_INST_INVOKE: { |
4106 | // INVOKE: [attrs, cc, normBB, unwindBB, fnty, op0,op1,op2, ...] |
4107 | if (Record.size() < 4) |
4108 | return error("Invalid record"); |
4109 | unsigned OpNum = 0; |
4110 | AttributeList PAL = getAttributes(Record[OpNum++]); |
4111 | unsigned CCInfo = Record[OpNum++]; |
4112 | BasicBlock *NormalBB = getBasicBlock(Record[OpNum++]); |
4113 | BasicBlock *UnwindBB = getBasicBlock(Record[OpNum++]); |
4114 | |
4115 | FunctionType *FTy = nullptr; |
4116 | if (CCInfo >> 13 & 1 && |
4117 | !(FTy = dyn_cast<FunctionType>(getTypeByID(Record[OpNum++])))) |
4118 | return error("Explicit invoke type is not a function type"); |
4119 | |
4120 | Value *Callee; |
4121 | if (getValueTypePair(Record, OpNum, NextValueNo, Callee)) |
4122 | return error("Invalid record"); |
4123 | |
4124 | PointerType *CalleeTy = dyn_cast<PointerType>(Callee->getType()); |
4125 | if (!CalleeTy) |
4126 | return error("Callee is not a pointer"); |
4127 | if (!FTy) { |
4128 | FTy = dyn_cast<FunctionType>(CalleeTy->getElementType()); |
4129 | if (!FTy) |
4130 | return error("Callee is not of pointer to function type"); |
4131 | } else if (CalleeTy->getElementType() != FTy) |
4132 | return error("Explicit invoke type does not match pointee type of " |
4133 | "callee operand"); |
4134 | if (Record.size() < FTy->getNumParams() + OpNum) |
4135 | return error("Insufficient operands to call"); |
4136 | |
4137 | SmallVector<Value*, 16> Ops; |
4138 | for (unsigned i = 0, e = FTy->getNumParams(); i != e; ++i, ++OpNum) { |
4139 | Ops.push_back(getValue(Record, OpNum, NextValueNo, |
4140 | FTy->getParamType(i))); |
4141 | if (!Ops.back()) |
4142 | return error("Invalid record"); |
4143 | } |
4144 | |
4145 | if (!FTy->isVarArg()) { |
4146 | if (Record.size() != OpNum) |
4147 | return error("Invalid record"); |
4148 | } else { |
4149 | // Read type/value pairs for varargs params. |
4150 | while (OpNum != Record.size()) { |
4151 | Value *Op; |
4152 | if (getValueTypePair(Record, OpNum, NextValueNo, Op)) |
4153 | return error("Invalid record"); |
4154 | Ops.push_back(Op); |
4155 | } |
4156 | } |
4157 | |
4158 | I = InvokeInst::Create(Callee, NormalBB, UnwindBB, Ops, OperandBundles); |
4159 | OperandBundles.clear(); |
4160 | InstructionList.push_back(I); |
4161 | cast<InvokeInst>(I)->setCallingConv( |
4162 | static_cast<CallingConv::ID>(CallingConv::MaxID & CCInfo)); |
4163 | cast<InvokeInst>(I)->setAttributes(PAL); |
4164 | break; |
4165 | } |
4166 | case bitc::FUNC_CODE_INST_RESUME: { // RESUME: [opval] |
4167 | unsigned Idx = 0; |
4168 | Value *Val = nullptr; |
4169 | if (getValueTypePair(Record, Idx, NextValueNo, Val)) |
4170 | return error("Invalid record"); |
4171 | I = ResumeInst::Create(Val); |
4172 | InstructionList.push_back(I); |
4173 | break; |
4174 | } |
4175 | case bitc::FUNC_CODE_INST_UNREACHABLE: // UNREACHABLE |
4176 | I = new UnreachableInst(Context); |
4177 | InstructionList.push_back(I); |
4178 | break; |
4179 | case bitc::FUNC_CODE_INST_PHI: { // PHI: [ty, val0,bb0, ...] |
4180 | if (Record.size() < 1 || ((Record.size()-1)&1)) |
4181 | return error("Invalid record"); |
4182 | Type *Ty = getTypeByID(Record[0]); |
4183 | if (!Ty) |
4184 | return error("Invalid record"); |
4185 | |
4186 | PHINode *PN = PHINode::Create(Ty, (Record.size()-1)/2); |
4187 | InstructionList.push_back(PN); |
4188 | |
4189 | for (unsigned i = 0, e = Record.size()-1; i != e; i += 2) { |
4190 | Value *V; |
4191 | // With the new function encoding, it is possible that operands have |
4192 | // negative IDs (for forward references). Use a signed VBR |
4193 | // representation to keep the encoding small. |
4194 | if (UseRelativeIDs) |
4195 | V = getValueSigned(Record, 1+i, NextValueNo, Ty); |
4196 | else |
4197 | V = getValue(Record, 1+i, NextValueNo, Ty); |
4198 | BasicBlock *BB = getBasicBlock(Record[2+i]); |
4199 | if (!V || !BB) |
4200 | return error("Invalid record"); |
4201 | PN->addIncoming(V, BB); |
4202 | } |
4203 | I = PN; |
4204 | break; |
4205 | } |
4206 | |
4207 | case bitc::FUNC_CODE_INST_LANDINGPAD: |
4208 | case bitc::FUNC_CODE_INST_LANDINGPAD_OLD: { |
4209 | // LANDINGPAD: [ty, val, val, num, (id0,val0 ...)?] |
4210 | unsigned Idx = 0; |
4211 | if (BitCode == bitc::FUNC_CODE_INST_LANDINGPAD) { |
4212 | if (Record.size() < 3) |
4213 | return error("Invalid record"); |
4214 | } else { |
4215 | 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" , "/build/llvm-toolchain-snapshot-8~svn345461/lib/Bitcode/Reader/BitcodeReader.cpp" , 4215, __PRETTY_FUNCTION__)); |
4216 | if (Record.size() < 4) |
4217 | return error("Invalid record"); |
4218 | } |
4219 | Type *Ty = getTypeByID(Record[Idx++]); |
4220 | if (!Ty) |
4221 | return error("Invalid record"); |
4222 | if (BitCode == bitc::FUNC_CODE_INST_LANDINGPAD_OLD) { |
4223 | Value *PersFn = nullptr; |
4224 | if (getValueTypePair(Record, Idx, NextValueNo, PersFn)) |
4225 | return error("Invalid record"); |
4226 | |
4227 | if (!F->hasPersonalityFn()) |
4228 | F->setPersonalityFn(cast<Constant>(PersFn)); |
4229 | else if (F->getPersonalityFn() != cast<Constant>(PersFn)) |
4230 | return error("Personality function mismatch"); |
4231 | } |
4232 | |
4233 | bool IsCleanup = !!Record[Idx++]; |
4234 | unsigned NumClauses = Record[Idx++]; |
4235 | LandingPadInst *LP = LandingPadInst::Create(Ty, NumClauses); |
4236 | LP->setCleanup(IsCleanup); |
4237 | for (unsigned J = 0; J != NumClauses; ++J) { |
4238 | LandingPadInst::ClauseType CT = |
4239 | LandingPadInst::ClauseType(Record[Idx++]); (void)CT; |
4240 | Value *Val; |
4241 | |
4242 | if (getValueTypePair(Record, Idx, NextValueNo, Val)) { |
4243 | delete LP; |
4244 | return error("Invalid record"); |
4245 | } |
4246 | |
4247 | 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!\"" , "/build/llvm-toolchain-snapshot-8~svn345461/lib/Bitcode/Reader/BitcodeReader.cpp" , 4249, __PRETTY_FUNCTION__)) |
4248 | !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!\"" , "/build/llvm-toolchain-snapshot-8~svn345461/lib/Bitcode/Reader/BitcodeReader.cpp" , 4249, __PRETTY_FUNCTION__)) |
4249 | "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!\"" , "/build/llvm-toolchain-snapshot-8~svn345461/lib/Bitcode/Reader/BitcodeReader.cpp" , 4249, __PRETTY_FUNCTION__)); |
4250 | 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!\"" , "/build/llvm-toolchain-snapshot-8~svn345461/lib/Bitcode/Reader/BitcodeReader.cpp" , 4252, __PRETTY_FUNCTION__)) |
4251 | 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!\"" , "/build/llvm-toolchain-snapshot-8~svn345461/lib/Bitcode/Reader/BitcodeReader.cpp" , 4252, __PRETTY_FUNCTION__)) |
4252 | "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!\"" , "/build/llvm-toolchain-snapshot-8~svn345461/lib/Bitcode/Reader/BitcodeReader.cpp" , 4252, __PRETTY_FUNCTION__)); |
4253 | LP->addClause(cast<Constant>(Val)); |
4254 | } |
4255 | |
4256 | I = LP; |
4257 | InstructionList.push_back(I); |
4258 | break; |
4259 | } |
4260 | |
4261 | case bitc::FUNC_CODE_INST_ALLOCA: { // ALLOCA: [instty, opty, op, align] |
4262 | if (Record.size() != 4) |
4263 | return error("Invalid record"); |
4264 | uint64_t AlignRecord = Record[3]; |
4265 | const uint64_t InAllocaMask = uint64_t(1) << 5; |
4266 | const uint64_t ExplicitTypeMask = uint64_t(1) << 6; |
4267 | const uint64_t SwiftErrorMask = uint64_t(1) << 7; |
4268 | const uint64_t FlagMask = InAllocaMask | ExplicitTypeMask | |
4269 | SwiftErrorMask; |
4270 | bool InAlloca = AlignRecord & InAllocaMask; |
4271 | bool SwiftError = AlignRecord & SwiftErrorMask; |
4272 | Type *Ty = getTypeByID(Record[0]); |
4273 | if ((AlignRecord & ExplicitTypeMask) == 0) { |
4274 | auto *PTy = dyn_cast_or_null<PointerType>(Ty); |
4275 | if (!PTy) |
4276 | return error("Old-style alloca with a non-pointer type"); |
4277 | Ty = PTy->getElementType(); |
4278 | } |
4279 | Type *OpTy = getTypeByID(Record[1]); |
4280 | Value *Size = getFnValueByID(Record[2], OpTy); |
4281 | unsigned Align; |
4282 | if (Error Err = parseAlignmentValue(AlignRecord & ~FlagMask, Align)) { |
4283 | return Err; |
4284 | } |
4285 | if (!Ty || !Size) |
4286 | return error("Invalid record"); |
4287 | |
4288 | // FIXME: Make this an optional field. |
4289 | const DataLayout &DL = TheModule->getDataLayout(); |
4290 | unsigned AS = DL.getAllocaAddrSpace(); |
4291 | |
4292 | AllocaInst *AI = new AllocaInst(Ty, AS, Size, Align); |
4293 | AI->setUsedWithInAlloca(InAlloca); |
4294 | AI->setSwiftError(SwiftError); |
4295 | I = AI; |
4296 | InstructionList.push_back(I); |
4297 | break; |
4298 | } |
4299 | case bitc::FUNC_CODE_INST_LOAD: { // LOAD: [opty, op, align, vol] |
4300 | unsigned OpNum = 0; |
4301 | Value *Op; |
4302 | if (getValueTypePair(Record, OpNum, NextValueNo, Op) || |
4303 | (OpNum + 2 != Record.size() && OpNum + 3 != Record.size())) |
4304 | return error("Invalid record"); |
4305 | |
4306 | Type *Ty = nullptr; |
4307 | if (OpNum + 3 == Record.size()) |
4308 | Ty = getTypeByID(Record[OpNum++]); |
4309 | if (Error Err = typeCheckLoadStoreInst(Ty, Op->getType())) |
4310 | return Err; |
4311 | if (!Ty) |
4312 | Ty = cast<PointerType>(Op->getType())->getElementType(); |
4313 | |
4314 | unsigned Align; |
4315 | if (Error Err = parseAlignmentValue(Record[OpNum], Align)) |
4316 | return Err; |
4317 | I = new LoadInst(Ty, Op, "", Record[OpNum + 1], Align); |
4318 | |
4319 | InstructionList.push_back(I); |
4320 | break; |
4321 | } |
4322 | case bitc::FUNC_CODE_INST_LOADATOMIC: { |
4323 | // LOADATOMIC: [opty, op, align, vol, ordering, ssid] |
4324 | unsigned OpNum = 0; |
4325 | Value *Op; |
4326 | if (getValueTypePair(Record, OpNum, NextValueNo, Op) || |
4327 | (OpNum + 4 != Record.size() && OpNum + 5 != Record.size())) |
4328 | return error("Invalid record"); |
4329 | |
4330 | Type *Ty = nullptr; |
4331 | if (OpNum + 5 == Record.size()) |
4332 | Ty = getTypeByID(Record[OpNum++]); |
4333 | if (Error Err = typeCheckLoadStoreInst(Ty, Op->getType())) |
4334 | return Err; |
4335 | if (!Ty) |
4336 | Ty = cast<PointerType>(Op->getType())->getElementType(); |
Value stored to 'Ty' is never read | |
4337 | |
4338 | AtomicOrdering Ordering = getDecodedOrdering(Record[OpNum + 2]); |
4339 | if (Ordering == AtomicOrdering::NotAtomic || |
4340 | Ordering == AtomicOrdering::Release || |
4341 | Ordering == AtomicOrdering::AcquireRelease) |
4342 | return error("Invalid record"); |
4343 | if (Ordering != AtomicOrdering::NotAtomic && Record[OpNum] == 0) |
4344 | return error("Invalid record"); |
4345 | SyncScope::ID SSID = getDecodedSyncScopeID(Record[OpNum + 3]); |
4346 | |
4347 | unsigned Align; |
4348 | if (Error Err = parseAlignmentValue(Record[OpNum], Align)) |
4349 | return Err; |
4350 | I = new LoadInst(Op, "", Record[OpNum+1], Align, Ordering, SSID); |
4351 | |
4352 | InstructionList.push_back(I); |
4353 | break; |
4354 | } |
4355 | case bitc::FUNC_CODE_INST_STORE: |
4356 | case bitc::FUNC_CODE_INST_STORE_OLD: { // STORE2:[ptrty, ptr, val, align, vol] |
4357 | unsigned OpNum = 0; |
4358 | Value *Val, *Ptr; |
4359 | if (getValueTypePair(Record, OpNum, NextValueNo, Ptr) || |
4360 | (BitCode == bitc::FUNC_CODE_INST_STORE |
4361 | ? getValueTypePair(Record, OpNum, NextValueNo, Val) |
4362 | : popValue(Record, OpNum, NextValueNo, |
4363 | cast<PointerType>(Ptr->getType())->getElementType(), |
4364 | Val)) || |
4365 | OpNum + 2 != Record.size()) |
4366 | return error("Invalid record"); |
4367 | |
4368 | if (Error Err = typeCheckLoadStoreInst(Val->getType(), Ptr->getType())) |
4369 | return Err; |
4370 | unsigned Align; |
4371 | if (Error Err = parseAlignmentValue(Record[OpNum], Align)) |
4372 | return Err; |
4373 | I = new StoreInst(Val, Ptr, Record[OpNum+1], Align); |
4374 | InstructionList.push_back(I); |
4375 | break; |
4376 | } |
4377 | case bitc::FUNC_CODE_INST_STOREATOMIC: |
4378 | case bitc::FUNC_CODE_INST_STOREATOMIC_OLD: { |
4379 | // STOREATOMIC: [ptrty, ptr, val, align, vol, ordering, ssid] |
4380 | unsigned OpNum = 0; |
4381 | Value *Val, *Ptr; |
4382 | if (getValueTypePair(Record, OpNum, NextValueNo, Ptr) || |
4383 | !isa<PointerType>(Ptr->getType()) || |
4384 | (BitCode == bitc::FUNC_CODE_INST_STOREATOMIC |
4385 | ? getValueTypePair(Record, OpNum, NextValueNo, Val) |
4386 | : popValue(Record, OpNum, NextValueNo, |
4387 | cast<PointerType>(Ptr->getType())->getElementType(), |
4388 | Val)) || |
4389 | OpNum + 4 != Record.size()) |
4390 | return error("Invalid record"); |
4391 | |
4392 | if (Error Err = typeCheckLoadStoreInst(Val->getType(), Ptr->getType())) |
4393 | return Err; |
4394 | AtomicOrdering Ordering = getDecodedOrdering(Record[OpNum + 2]); |
4395 | if (Ordering == AtomicOrdering::NotAtomic || |
4396 | Ordering == AtomicOrdering::Acquire || |
4397 | Ordering == AtomicOrdering::AcquireRelease) |
4398 | return error("Invalid record"); |
4399 | SyncScope::ID SSID = getDecodedSyncScopeID(Record[OpNum + 3]); |
4400 | if (Ordering != AtomicOrdering::NotAtomic && Record[OpNum] == 0) |
4401 | return error("Invalid record"); |
4402 | |
4403 | unsigned Align; |
4404 | if (Error Err = parseAlignmentValue(Record[OpNum], Align)) |
4405 | return Err; |
4406 | I = new StoreInst(Val, Ptr, Record[OpNum+1], Align, Ordering, SSID); |
4407 | InstructionList.push_back(I); |
4408 | break; |
4409 | } |
4410 | case bitc::FUNC_CODE_INST_CMPXCHG_OLD: |
4411 | case bitc::FUNC_CODE_INST_CMPXCHG: { |
4412 | // CMPXCHG:[ptrty, ptr, cmp, new, vol, successordering, ssid, |
4413 | // failureordering?, isweak?] |
4414 | unsigned OpNum = 0; |
4415 | Value *Ptr, *Cmp, *New; |
4416 | if (getValueTypePair(Record, OpNum, NextValueNo, Ptr) || |
4417 | (BitCode == bitc::FUNC_CODE_INST_CMPXCHG |
4418 | ? getValueTypePair(Record, OpNum, NextValueNo, Cmp) |
4419 | : popValue(Record, OpNum, NextValueNo, |
4420 | cast<PointerType>(Ptr->getType())->getElementType(), |
4421 | Cmp)) || |
4422 | popValue(Record, OpNum, NextValueNo, Cmp->getType(), New) || |
4423 | Record.size() < OpNum + 3 || Record.size() > OpNum + 5) |
4424 | return error("Invalid record"); |
4425 | AtomicOrdering SuccessOrdering = getDecodedOrdering(Record[OpNum + 1]); |
4426 | if (SuccessOrdering == AtomicOrdering::NotAtomic || |
4427 | SuccessOrdering == AtomicOrdering::Unordered) |
4428 | return error("Invalid record"); |
4429 | SyncScope::ID SSID = getDecodedSyncScopeID(Record[OpNum + 2]); |
4430 | |
4431 | if (Error Err = typeCheckLoadStoreInst(Cmp->getType(), Ptr->getType())) |
4432 | return Err; |
4433 | AtomicOrdering FailureOrdering; |
4434 | if (Record.size() < 7) |
4435 | FailureOrdering = |
4436 | AtomicCmpXchgInst::getStrongestFailureOrdering(SuccessOrdering); |
4437 | else |
4438 | FailureOrdering = getDecodedOrdering(Record[OpNum + 3]); |
4439 | |
4440 | I = new AtomicCmpXchgInst(Ptr, Cmp, New, SuccessOrdering, FailureOrdering, |
4441 | SSID); |
4442 | cast<AtomicCmpXchgInst>(I)->setVolatile(Record[OpNum]); |
4443 | |
4444 | if (Record.size() < 8) { |
4445 | // Before weak cmpxchgs existed, the instruction simply returned the |
4446 | // value loaded from memory, so bitcode files from that era will be |
4447 | // expecting the first component of a modern cmpxchg. |
4448 | CurBB->getInstList().push_back(I); |
4449 | I = ExtractValueInst::Create(I, 0); |
4450 | } else { |
4451 | cast<AtomicCmpXchgInst>(I)->setWeak(Record[OpNum+4]); |
4452 | } |
4453 | |
4454 | InstructionList.push_back(I); |
4455 | break; |
4456 | } |
4457 | case bitc::FUNC_CODE_INST_ATOMICRMW: { |
4458 | // ATOMICRMW:[ptrty, ptr, val, op, vol, ordering, ssid] |
4459 | unsigned OpNum = 0; |
4460 | Value *Ptr, *Val; |
4461 | if (getValueTypePair(Record, OpNum, NextValueNo, Ptr) || |
4462 | !isa<PointerType>(Ptr->getType()) || |
4463 | popValue(Record, OpNum, NextValueNo, |
4464 | cast<PointerType>(Ptr->getType())->getElementType(), Val) || |
4465 | OpNum+4 != Record.size()) |
4466 | return error("Invalid record"); |
4467 | AtomicRMWInst::BinOp Operation = getDecodedRMWOperation(Record[OpNum]); |
4468 | if (Operation < AtomicRMWInst::FIRST_BINOP || |
4469 | Operation > AtomicRMWInst::LAST_BINOP) |
4470 | return error("Invalid record"); |
4471 | AtomicOrdering Ordering = getDecodedOrdering(Record[OpNum + 2]); |
4472 | if (Ordering == AtomicOrdering::NotAtomic || |
4473 | Ordering == AtomicOrdering::Unordered) |
4474 | return error("Invalid record"); |
4475 | SyncScope::ID SSID = getDecodedSyncScopeID(Record[OpNum + 3]); |
4476 | I = new AtomicRMWInst(Operation, Ptr, Val, Ordering, SSID); |
4477 | cast<AtomicRMWInst>(I)->setVolatile(Record[OpNum+1]); |
4478 | InstructionList.push_back(I); |
4479 | break; |
4480 | } |
4481 | case bitc::FUNC_CODE_INST_FENCE: { // FENCE:[ordering, ssid] |
4482 | if (2 != Record.size()) |
4483 | return error("Invalid record"); |
4484 | AtomicOrdering Ordering = getDecodedOrdering(Record[0]); |
4485 | if (Ordering == AtomicOrdering::NotAtomic || |
4486 | Ordering == AtomicOrdering::Unordered || |
4487 | Ordering == AtomicOrdering::Monotonic) |
4488 | return error("Invalid record"); |
4489 | SyncScope::ID SSID = getDecodedSyncScopeID(Record[1]); |
4490 | I = new FenceInst(Context, Ordering, SSID); |
4491 | InstructionList.push_back(I); |
4492 | break; |
4493 | } |
4494 | case bitc::FUNC_CODE_INST_CALL: { |
4495 | // CALL: [paramattrs, cc, fmf, fnty, fnid, arg0, arg1...] |
4496 | if (Record.size() < 3) |
4497 | return error("Invalid record"); |
4498 | |
4499 | unsigned OpNum = 0; |
4500 | AttributeList PAL = getAttributes(Record[OpNum++]); |
4501 | unsigned CCInfo = Record[OpNum++]; |
4502 | |
4503 | FastMathFlags FMF; |
4504 | if ((CCInfo >> bitc::CALL_FMF) & 1) { |
4505 | FMF = getDecodedFastMathFlags(Record[OpNum++]); |
4506 | if (!FMF.any()) |
4507 | return error("Fast math flags indicator set for call with no FMF"); |
4508 | } |
4509 | |
4510 | FunctionType *FTy = nullptr; |
4511 | if (CCInfo >> bitc::CALL_EXPLICIT_TYPE & 1 && |
4512 | !(FTy = dyn_cast<FunctionType>(getTypeByID(Record[OpNum++])))) |
4513 | return error("Explicit call type is not a function type"); |
4514 | |
4515 | Value *Callee; |
4516 | if (getValueTypePair(Record, OpNum, NextValueNo, Callee)) |
4517 | return error("Invalid record"); |
4518 | |
4519 | PointerType *OpTy = dyn_cast<PointerType>(Callee->getType()); |
4520 | if (!OpTy) |
4521 | return error("Callee is not a pointer type"); |
4522 | if (!FTy) { |
4523 | FTy = dyn_cast<FunctionType>(OpTy->getElementType()); |
4524 | if (!FTy) |
4525 | return error("Callee is not of pointer to function type"); |
4526 | } else if (OpTy->getElementType() != FTy) |
4527 | return error("Explicit call type does not match pointee type of " |
4528 | "callee operand"); |
4529 | if (Record.size() < FTy->getNumParams() + OpNum) |
4530 | return error("Insufficient operands to call"); |
4531 | |
4532 | SmallVector<Value*, 16> Args; |
4533 | // Read the fixed params. |
4534 | for (unsigned i = 0, e = FTy->getNumParams(); i != e; ++i, ++OpNum) { |
4535 | if (FTy->getParamType(i)->isLabelTy()) |
4536 | Args.push_back(getBasicBlock(Record[OpNum])); |
4537 | else |
4538 | Args.push_back(getValue(Record, OpNum, NextValueNo, |
4539 | FTy->getParamType(i))); |
4540 | if (!Args.back()) |
4541 | return error("Invalid record"); |
4542 | } |
4543 | |
4544 | // Read type/value pairs for varargs params. |
4545 | if (!FTy->isVarArg()) { |
4546 | if (OpNum != Record.size()) |
4547 | return error("Invalid record"); |
4548 | } else { |
4549 | while (OpNum != Record.size()) { |
4550 | Value *Op; |
4551 | if (getValueTypePair(Record, OpNum, NextValueNo, Op)) |
4552 | return error("Invalid record"); |
4553 | Args.push_back(Op); |
4554 | } |
4555 | } |
4556 | |
4557 | I = CallInst::Create(FTy, Callee, Args, OperandBundles); |
4558 | OperandBundles.clear(); |
4559 | InstructionList.push_back(I); |
4560 | cast<CallInst>(I)->setCallingConv( |
4561 | static_cast<CallingConv::ID>((0x7ff & CCInfo) >> bitc::CALL_CCONV)); |
4562 | CallInst::TailCallKind TCK = CallInst::TCK_None; |
4563 | if (CCInfo & 1 << bitc::CALL_TAIL) |
4564 | TCK = CallInst::TCK_Tail; |
4565 | if (CCInfo & (1 << bitc::CALL_MUSTTAIL)) |
4566 | TCK = CallInst::TCK_MustTail; |
4567 | if (CCInfo & (1 << bitc::CALL_NOTAIL)) |
4568 | TCK = CallInst::TCK_NoTail; |
4569 | cast<CallInst>(I)->setTailCallKind(TCK); |
4570 | cast<CallInst>(I)->setAttributes(PAL); |
4571 | if (FMF.any()) { |
4572 | if (!isa<FPMathOperator>(I)) |
4573 | return error("Fast-math-flags specified for call without " |
4574 | "floating-point scalar or vector return type"); |
4575 | I->setFastMathFlags(FMF); |
4576 | } |
4577 | break; |
4578 | } |
4579 | case bitc::FUNC_CODE_INST_VAARG: { // VAARG: [valistty, valist, instty] |
4580 | if (Record.size() < 3) |
4581 | return error("Invalid record"); |
4582 | Type *OpTy = getTypeByID(Record[0]); |
4583 | Value *Op = getValue(Record, 1, NextValueNo, OpTy); |
4584 | Type *ResTy = getTypeByID(Record[2]); |
4585 | if (!OpTy || !Op || !ResTy) |
4586 | return error("Invalid record"); |
4587 | I = new VAArgInst(Op, ResTy); |
4588 | InstructionList.push_back(I); |
4589 | break; |
4590 | } |
4591 | |
4592 | case bitc::FUNC_CODE_OPERAND_BUNDLE: { |
4593 | // A call or an invoke can be optionally prefixed with some variable |
4594 | // number of operand bundle blocks. These blocks are read into |
4595 | // OperandBundles and consumed at the next call or invoke instruction. |
4596 | |
4597 | if (Record.size() < 1 || Record[0] >= BundleTags.size()) |
4598 | return error("Invalid record"); |
4599 | |
4600 | std::vector<Value *> Inputs; |
4601 | |
4602 | unsigned OpNum = 1; |
4603 | while (OpNum != Record.size()) { |
4604 | Value *Op; |
4605 | if (getValueTypePair(Record, OpNum, NextValueNo, Op)) |
4606 | return error("Invalid record"); |
4607 | Inputs.push_back(Op); |
4608 | } |
4609 | |
4610 | OperandBundles.emplace_back(BundleTags[Record[0]], std::move(Inputs)); |
4611 | continue; |
4612 | } |
4613 | } |
4614 | |
4615 | // Add instruction to end of current BB. If there is no current BB, reject |
4616 | // this file. |
4617 | if (!CurBB) { |
4618 | I->deleteValue(); |
4619 | return error("Invalid instruction with no BB"); |
4620 | } |
4621 | if (!OperandBundles.empty()) { |
4622 | I->deleteValue(); |
4623 | return error("Operand bundles found with no consumer"); |
4624 | } |
4625 | CurBB->getInstList().push_back(I); |
4626 | |
4627 | // If this was a terminator instruction, move to the next block. |
4628 | if (I->isTerminator()) { |
4629 | ++CurBBNo; |
4630 | CurBB = CurBBNo < FunctionBBs.size() ? FunctionBBs[CurBBNo] : nullptr; |
4631 | } |
4632 | |
4633 | // Non-void values get registered in the value table for future use. |
4634 | if (I && !I->getType()->isVoidTy()) |
4635 | ValueList.assignValue(I, NextValueNo++); |
4636 | } |
4637 | |
4638 | OutOfRecordLoop: |
4639 | |
4640 | if (!OperandBundles.empty()) |
4641 | return error("Operand bundles found with no consumer"); |
4642 | |
4643 | // Check the function list for unresolved values. |
4644 | if (Argument *A = dyn_cast<Argument>(ValueList.back())) { |
4645 | if (!A->getParent()) { |
4646 | // We found at least one unresolved value. Nuke them all to avoid leaks. |
4647 | for (unsigned i = ModuleValueListSize, e = ValueList.size(); i != e; ++i){ |
4648 | if ((A = dyn_cast_or_null<Argument>(ValueList[i])) && !A->getParent()) { |
4649 | A->replaceAllUsesWith(UndefValue::get(A->getType())); |
4650 | delete A; |
4651 | } |
4652 | } |
4653 | return error("Never resolved value found in function"); |
4654 | } |
4655 | } |
4656 | |
4657 | // Unexpected unresolved metadata about to be dropped. |
4658 | if (MDLoader->hasFwdRefs()) |
4659 | return error("Invalid function metadata: outgoing forward refs"); |
4660 | |
4661 | // Trim the value list down to the size it was before we parsed this function. |
4662 | ValueList.shrinkTo(ModuleValueListSize); |
4663 | MDLoader->shrinkTo(ModuleMDLoaderSize); |
4664 | std::vector<BasicBlock*>().swap(FunctionBBs); |
4665 | return Error::success(); |
4666 | } |
4667 | |
4668 | /// Find the function body in the bitcode stream |
4669 | Error BitcodeReader::findFunctionInStream( |
4670 | Function *F, |
4671 | DenseMap<Function *, uint64_t>::iterator DeferredFunctionInfoIterator) { |
4672 | while (DeferredFunctionInfoIterator->second == 0) { |
4673 | // This is the fallback handling for the old format bitcode that |
4674 | // didn't contain the function index in the VST, or when we have |
4675 | // an anonymous function which would not have a VST entry. |
4676 | // Assert that we have one of those two cases. |
4677 | assert(VSTOffset == 0 || !F->hasName())((VSTOffset == 0 || !F->hasName()) ? static_cast<void> (0) : __assert_fail ("VSTOffset == 0 || !F->hasName()", "/build/llvm-toolchain-snapshot-8~svn345461/lib/Bitcode/Reader/BitcodeReader.cpp" , 4677, __PRETTY_FUNCTION__)); |
4678 | // Parse the next body in the stream and set its position in the |
4679 | // DeferredFunctionInfo map. |
4680 | if (Error Err = rememberAndSkipFunctionBodies()) |
4681 | return Err; |
4682 | } |
4683 | return Error::success(); |
4684 | } |
4685 | |
4686 | SyncScope::ID BitcodeReader::getDecodedSyncScopeID(unsigned Val) { |
4687 | if (Val == SyncScope::SingleThread || Val == SyncScope::System) |
4688 | return SyncScope::ID(Val); |
4689 | if (Val >= SSIDs.size()) |
4690 | return SyncScope::System; // Map unknown synchronization scopes to system. |
4691 | return SSIDs[Val]; |
4692 | } |
4693 | |
4694 | //===----------------------------------------------------------------------===// |
4695 | // GVMaterializer implementation |
4696 | //===----------------------------------------------------------------------===// |
4697 | |
4698 | Error BitcodeReader::materialize(GlobalValue *GV) { |
4699 | Function *F = dyn_cast<Function>(GV); |
4700 | // If it's not a function or is already material, ignore the request. |
4701 | if (!F || !F->isMaterializable()) |
4702 | return Error::success(); |
4703 | |
4704 | DenseMap<Function*, uint64_t>::iterator DFII = DeferredFunctionInfo.find(F); |
4705 | 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!\"" , "/build/llvm-toolchain-snapshot-8~svn345461/lib/Bitcode/Reader/BitcodeReader.cpp" , 4705, __PRETTY_FUNCTION__)); |
4706 | // If its position is recorded as 0, its body is somewhere in the stream |
4707 | // but we haven't seen it yet. |
4708 | if (DFII->second == 0) |
4709 | if (Error Err = findFunctionInStream(F, DFII)) |
4710 | return Err; |
4711 | |
4712 | // Materialize metadata before parsing any function bodies. |
4713 | if (Error Err = materializeMetadata()) |
4714 | return Err; |
4715 | |
4716 | // Move the bit stream to the saved position of the deferred function body. |
4717 | Stream.JumpToBit(DFII->second); |
4718 | |
4719 | if (Error Err = parseFunctionBody(F)) |
4720 | return Err; |
4721 | F->setIsMaterializable(false); |
4722 | |
4723 | if (StripDebugInfo) |
4724 | stripDebugInfo(*F); |
4725 | |
4726 | // Upgrade any old intrinsic calls in the function. |
4727 | for (auto &I : UpgradedIntrinsics) { |
4728 | for (auto UI = I.first->materialized_user_begin(), UE = I.first->user_end(); |
4729 | UI != UE;) { |
4730 | User *U = *UI; |
4731 | ++UI; |
4732 | if (CallInst *CI = dyn_cast<CallInst>(U)) |
4733 | UpgradeIntrinsicCall(CI, I.second); |
4734 | } |
4735 | } |
4736 | |
4737 | // Update calls to the remangled intrinsics |
4738 | for (auto &I : RemangledIntrinsics) |
4739 | for (auto UI = I.first->materialized_user_begin(), UE = I.first->user_end(); |
4740 | UI != UE;) |
4741 | // Don't expect any other users than call sites |
4742 | CallSite(*UI++).setCalledFunction(I.second); |
4743 | |
4744 | // Finish fn->subprogram upgrade for materialized functions. |
4745 | if (DISubprogram *SP = MDLoader->lookupSubprogramForFunction(F)) |
4746 | F->setSubprogram(SP); |
4747 | |
4748 | // Check if the TBAA Metadata are valid, otherwise we will need to strip them. |
4749 | if (!MDLoader->isStrippingTBAA()) { |
4750 | for (auto &I : instructions(F)) { |
4751 | MDNode *TBAA = I.getMetadata(LLVMContext::MD_tbaa); |
4752 | if (!TBAA || TBAAVerifyHelper.visitTBAAMetadata(I, TBAA)) |
4753 | continue; |
4754 | MDLoader->setStripTBAA(true); |
4755 | stripTBAA(F->getParent()); |
4756 | } |
4757 | } |
4758 | |
4759 | // Bring in any functions that this function forward-referenced via |
4760 | // blockaddresses. |
4761 | return materializeForwardReferencedFunctions(); |
4762 | } |
4763 | |
4764 | Error BitcodeReader::materializeModule() { |
4765 | if (Error Err = materializeMetadata()) |
4766 | return Err; |
4767 | |
4768 | // Promise to materialize all forward references. |
4769 | WillMaterializeAllForwardRefs = true; |
4770 | |
4771 | // Iterate over the module, deserializing any functions that are still on |
4772 | // disk. |
4773 | for (Function &F : *TheModule) { |
4774 | if (Error Err = materialize(&F)) |
4775 | return Err; |
4776 | } |
4777 | // At this point, if there are any function bodies, parse the rest of |
4778 | // the bits in the module past the last function block we have recorded |
4779 | // through either lazy scanning or the VST. |
4780 | if (LastFunctionBlockBit || NextUnreadBit) |
4781 | if (Error Err = parseModule(LastFunctionBlockBit > NextUnreadBit |
4782 | ? LastFunctionBlockBit |
4783 | : NextUnreadBit)) |
4784 | return Err; |
4785 | |
4786 | // Check that all block address forward references got resolved (as we |
4787 | // promised above). |
4788 | if (!BasicBlockFwdRefs.empty()) |
4789 | return error("Never resolved function from blockaddress"); |
4790 | |
4791 | // Upgrade any intrinsic calls that slipped through (should not happen!) and |
4792 | // delete the old functions to clean up. We can't do this unless the entire |
4793 | // module is materialized because there could always be another function body |
4794 | // with calls to the old function. |
4795 | for (auto &I : UpgradedIntrinsics) { |
4796 | for (auto *U : I.first->users()) { |
4797 | if (CallInst *CI = dyn_cast<CallInst>(U)) |
4798 | UpgradeIntrinsicCall(CI, I.second); |
4799 | } |
4800 | if (!I.first->use_empty()) |
4801 | I.first->replaceAllUsesWith(I.second); |
4802 | I.first->eraseFromParent(); |
4803 | } |
4804 | UpgradedIntrinsics.clear(); |
4805 | // Do the same for remangled intrinsics |
4806 | for (auto &I : RemangledIntrinsics) { |
4807 | I.first->replaceAllUsesWith(I.second); |
4808 | I.first->eraseFromParent(); |
4809 | } |
4810 | RemangledIntrinsics.clear(); |
4811 | |
4812 | UpgradeDebugInfo(*TheModule); |
4813 | |
4814 | UpgradeModuleFlags(*TheModule); |
4815 | |
4816 | UpgradeRetainReleaseMarker(*TheModule); |
4817 | |
4818 | return Error::success(); |
4819 | } |
4820 | |
4821 | std::vector<StructType *> BitcodeReader::getIdentifiedStructTypes() const { |
4822 | return IdentifiedStructTypes; |
4823 | } |
4824 | |
4825 | ModuleSummaryIndexBitcodeReader::ModuleSummaryIndexBitcodeReader( |
4826 | BitstreamCursor Cursor, StringRef Strtab, ModuleSummaryIndex &TheIndex, |
4827 | StringRef ModulePath, unsigned ModuleId) |
4828 | : BitcodeReaderBase(std::move(Cursor), Strtab), TheIndex(TheIndex), |
4829 | ModulePath(ModulePath), ModuleId(ModuleId) {} |
4830 | |
4831 | void ModuleSummaryIndexBitcodeReader::addThisModule() { |
4832 | TheIndex.addModule(ModulePath, ModuleId); |
4833 | } |
4834 | |
4835 | ModuleSummaryIndex::ModuleInfo * |
4836 | ModuleSummaryIndexBitcodeReader::getThisModule() { |
4837 | return TheIndex.getModule(ModulePath); |
4838 | } |
4839 | |
4840 | std::pair<ValueInfo, GlobalValue::GUID> |
4841 | ModuleSummaryIndexBitcodeReader::getValueInfoFromValueId(unsigned ValueId) { |
4842 | auto VGI = ValueIdToValueInfoMap[ValueId]; |
4843 | assert(VGI.first)((VGI.first) ? static_cast<void> (0) : __assert_fail ("VGI.first" , "/build/llvm-toolchain-snapshot-8~svn345461/lib/Bitcode/Reader/BitcodeReader.cpp" , 4843, __PRETTY_FUNCTION__)); |
4844 | return VGI; |
4845 | } |
4846 | |
4847 | void ModuleSummaryIndexBitcodeReader::setValueGUID( |
4848 | uint64_t ValueID, StringRef ValueName, GlobalValue::LinkageTypes Linkage, |
4849 | StringRef SourceFileName) { |
4850 | std::string GlobalId = |
4851 | GlobalValue::getGlobalIdentifier(ValueName, Linkage, SourceFileName); |
4852 | auto ValueGUID = GlobalValue::getGUID(GlobalId); |
4853 | auto OriginalNameID = ValueGUID; |
4854 | if (GlobalValue::isLocalLinkage(Linkage)) |
4855 | OriginalNameID = GlobalValue::getGUID(ValueName); |
4856 | if (PrintSummaryGUIDs) |
4857 | dbgs() << "GUID " << ValueGUID << "(" << OriginalNameID << ") is " |
4858 | << ValueName << "\n"; |
4859 | |
4860 | // UseStrtab is false for legacy summary formats and value names are |
4861 | // created on stack. In that case we save the name in a string saver in |
4862 | // the index so that the value name can be recorded. |
4863 | ValueIdToValueInfoMap[ValueID] = std::make_pair( |
4864 | TheIndex.getOrInsertValueInfo( |
4865 | ValueGUID, |
4866 | UseStrtab ? ValueName : TheIndex.saveString(ValueName.str())), |
4867 | OriginalNameID); |
4868 | } |
4869 | |
4870 | // Specialized value symbol table parser used when reading module index |
4871 | // blocks where we don't actually create global values. The parsed information |
4872 | // is saved in the bitcode reader for use when later parsing summaries. |
4873 | Error ModuleSummaryIndexBitcodeReader::parseValueSymbolTable( |
4874 | uint64_t Offset, |
4875 | DenseMap<unsigned, GlobalValue::LinkageTypes> &ValueIdToLinkageMap) { |
4876 | // With a strtab the VST is not required to parse the summary. |
4877 | if (UseStrtab) |
4878 | return Error::success(); |
4879 | |
4880 | 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\"" , "/build/llvm-toolchain-snapshot-8~svn345461/lib/Bitcode/Reader/BitcodeReader.cpp" , 4880, __PRETTY_FUNCTION__)); |
4881 | uint64_t CurrentBit = jumpToValueSymbolTable(Offset, Stream); |
4882 | |
4883 | if (Stream.EnterSubBlock(bitc::VALUE_SYMTAB_BLOCK_ID)) |
4884 | return error("Invalid record"); |
4885 | |
4886 | SmallVector<uint64_t, 64> Record; |
4887 | |
4888 | // Read all the records for this value table. |
4889 | SmallString<128> ValueName; |
4890 | |
4891 | while (true) { |
4892 | BitstreamEntry Entry = Stream.advanceSkippingSubblocks(); |
4893 | |
4894 | switch (Entry.Kind) { |
4895 | case BitstreamEntry::SubBlock: // Handled for us already. |
4896 | case BitstreamEntry::Error: |
4897 | return error("Malformed block"); |
4898 | case BitstreamEntry::EndBlock: |
4899 | // Done parsing VST, jump back to wherever we came from. |
4900 | Stream.JumpToBit(CurrentBit); |
4901 | return Error::success(); |
4902 | case BitstreamEntry::Record: |
4903 | // The interesting case. |
4904 | break; |
4905 | } |
4906 | |
4907 | // Read a record. |
4908 | Record.clear(); |
4909 | switch (Stream.readRecord(Entry.ID, Record)) { |
4910 | default: // Default behavior: ignore (e.g. VST_CODE_BBENTRY records). |
4911 | break; |
4912 | case bitc::VST_CODE_ENTRY: { // VST_CODE_ENTRY: [valueid, namechar x N] |
4913 | if (convertToString(Record, 1, ValueName)) |
4914 | return error("Invalid record"); |
4915 | unsigned ValueID = Record[0]; |
4916 | assert(!SourceFileName.empty())((!SourceFileName.empty()) ? static_cast<void> (0) : __assert_fail ("!SourceFileName.empty()", "/build/llvm-toolchain-snapshot-8~svn345461/lib/Bitcode/Reader/BitcodeReader.cpp" , 4916, __PRETTY_FUNCTION__)); |
4917 | auto VLI = ValueIdToLinkageMap.find(ValueID); |
4918 | 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?\"" , "/build/llvm-toolchain-snapshot-8~svn345461/lib/Bitcode/Reader/BitcodeReader.cpp" , 4919, __PRETTY_FUNCTION__)) |
4919 | "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?\"" , "/build/llvm-toolchain-snapshot-8~svn345461/lib/Bitcode/Reader/BitcodeReader.cpp" , 4919, __PRETTY_FUNCTION__)); |
4920 | auto Linkage = VLI->second; |
4921 | setValueGUID(ValueID, ValueName, Linkage, SourceFileName); |
4922 | ValueName.clear(); |
4923 | break; |
4924 | } |
4925 | case bitc::VST_CODE_FNENTRY: { |
4926 | // VST_CODE_FNENTRY: [valueid, offset, namechar x N] |
4927 | if (convertToString(Record, 2, ValueName)) |
4928 | return error("Invalid record"); |
4929 | unsigned ValueID = Record[0]; |
4930 | assert(!SourceFileName.empty())((!SourceFileName.empty()) ? static_cast<void> (0) : __assert_fail ("!SourceFileName.empty()", "/build/llvm-toolchain-snapshot-8~svn345461/lib/Bitcode/Reader/BitcodeReader.cpp" , 4930, __PRETTY_FUNCTION__)); |
4931 | auto VLI = ValueIdToLinkageMap.find(ValueID); |
4932 | 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?\"" , "/build/llvm-toolchain-snapshot-8~svn345461/lib/Bitcode/Reader/BitcodeReader.cpp" , 4933, __PRETTY_FUNCTION__)) |
4933 | "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?\"" , "/build/llvm-toolchain-snapshot-8~svn345461/lib/Bitcode/Reader/BitcodeReader.cpp" , 4933, __PRETTY_FUNCTION__)); |
4934 | auto Linkage = VLI->second; |
4935 | setValueGUID(ValueID, ValueName, Linkage, SourceFileName); |
4936 | ValueName.clear(); |
4937 | break; |
4938 | } |
4939 | case bitc::VST_CODE_COMBINED_ENTRY: { |
4940 | // VST_CODE_COMBINED_ENTRY: [valueid, refguid] |
4941 | unsigned ValueID = Record[0]; |
4942 | GlobalValue::GUID RefGUID = Record[1]; |
4943 | // The "original name", which is the second value of the pair will be |
4944 | // overriden later by a FS_COMBINED_ORIGINAL_NAME in the combined index. |
4945 | ValueIdToValueInfoMap[ValueID] = |
4946 | std::make_pair(TheIndex.getOrInsertValueInfo(RefGUID), RefGUID); |
4947 | break; |
4948 | } |
4949 | } |
4950 | } |
4951 | } |
4952 | |
4953 | // Parse just the blocks needed for building the index out of the module. |
4954 | // At the end of this routine the module Index is populated with a map |
4955 | // from global value id to GlobalValueSummary objects. |
4956 | Error ModuleSummaryIndexBitcodeReader::parseModule() { |
4957 | if (Stream.EnterSubBlock(bitc::MODULE_BLOCK_ID)) |
4958 | return error("Invalid record"); |
4959 | |
4960 | SmallVector<uint64_t, 64> Record; |
4961 | DenseMap<unsigned, GlobalValue::LinkageTypes> ValueIdToLinkageMap; |
4962 | unsigned ValueId = 0; |
4963 | |
4964 | // Read the index for this module. |
4965 | while (true) { |
4966 | BitstreamEntry Entry = Stream.advance(); |
4967 | |
4968 | switch (Entry.Kind) { |
4969 | case BitstreamEntry::Error: |
4970 | return error("Malformed block"); |
4971 | case BitstreamEntry::EndBlock: |
4972 | return Error::success(); |
4973 | |
4974 | case BitstreamEntry::SubBlock: |
4975 | switch (Entry.ID) { |
4976 | default: // Skip unknown content. |
4977 | if (Stream.SkipBlock()) |
4978 | return error("Invalid record"); |
4979 | break; |
4980 | case bitc::BLOCKINFO_BLOCK_ID: |
4981 | // Need to parse these to get abbrev ids (e.g. for VST) |
4982 | if (readBlockInfo()) |
4983 | return error("Malformed block"); |
4984 | break; |
4985 | case bitc::VALUE_SYMTAB_BLOCK_ID: |
4986 | // Should have been parsed earlier via VSTOffset, unless there |
4987 | // is no summary section. |
4988 | 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\"" , "/build/llvm-toolchain-snapshot-8~svn345461/lib/Bitcode/Reader/BitcodeReader.cpp" , 4990, __PRETTY_FUNCTION__)) |
4989 | !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\"" , "/build/llvm-toolchain-snapshot-8~svn345461/lib/Bitcode/Reader/BitcodeReader.cpp" , 4990, __PRETTY_FUNCTION__)) |
4990 | "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\"" , "/build/llvm-toolchain-snapshot-8~svn345461/lib/Bitcode/Reader/BitcodeReader.cpp" , 4990, __PRETTY_FUNCTION__)); |
4991 | if (Stream.SkipBlock()) |
4992 | return error("Invalid record"); |
4993 | break; |
4994 | case bitc::GLOBALVAL_SUMMARY_BLOCK_ID: |
4995 | case bitc::FULL_LTO_GLOBALVAL_SUMMARY_BLOCK_ID: |
4996 | // Add the module if it is a per-module index (has a source file name). |
4997 | if (!SourceFileName.empty()) |
4998 | addThisModule(); |
4999 | assert(!SeenValueSymbolTable &&((!SeenValueSymbolTable && "Already read VST when parsing summary block?" ) ? static_cast<void> (0) : __assert_fail ("!SeenValueSymbolTable && \"Already read VST when parsing summary block?\"" , "/build/llvm-toolchain-snapshot-8~svn345461/lib/Bitcode/Reader/BitcodeReader.cpp" , 5000, __PRETTY_FUNCTION__)) |
5000 | "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?\"" , "/build/llvm-toolchain-snapshot-8~svn345461/lib/Bitcode/Reader/BitcodeReader.cpp" , 5000, __PRETTY_FUNCTION__)); |
5001 | // We might not have a VST if there were no values in the |
5002 | // summary. An empty summary block generated when we are |
5003 | // performing ThinLTO compiles so we don't later invoke |
5004 | // the regular LTO process on them. |
5005 | if (VSTOffset > 0) { |
5006 | if (Error Err = parseValueSymbolTable(VSTOffset, ValueIdToLinkageMap)) |
5007 | return Err; |
5008 | SeenValueSymbolTable = true; |
5009 | } |
5010 | SeenGlobalValSummary = true; |
5011 | if (Error Err = parseEntireSummary(Entry.ID)) |
5012 | return Err; |
5013 | break; |
5014 | case bitc::MODULE_STRTAB_BLOCK_ID: |
5015 | if (Error Err = parseModuleStringTable()) |
5016 | return Err; |
5017 | break; |
5018 | } |
5019 | continue; |
5020 | |
5021 | case BitstreamEntry::Record: { |
5022 | Record.clear(); |
5023 | auto BitCode = Stream.readRecord(Entry.ID, Record); |
5024 | switch (BitCode) { |
5025 | default: |
5026 | break; // Default behavior, ignore unknown content. |
5027 | case bitc::MODULE_CODE_VERSION: { |
5028 | if (Error Err = parseVersionRecord(Record).takeError()) |
5029 | return Err; |
5030 | break; |
5031 | } |
5032 | /// MODULE_CODE_SOURCE_FILENAME: [namechar x N] |
5033 | case bitc::MODULE_CODE_SOURCE_FILENAME: { |
5034 | SmallString<128> ValueName; |
5035 | if (convertToString(Record, 0, ValueName)) |
5036 | return error("Invalid record"); |
5037 | SourceFileName = ValueName.c_str(); |
5038 | break; |
5039 | } |
5040 | /// MODULE_CODE_HASH: [5*i32] |
5041 | case bitc::MODULE_CODE_HASH: { |
5042 | if (Record.size() != 5) |
5043 | return error("Invalid hash length " + Twine(Record.size()).str()); |
5044 | auto &Hash = getThisModule()->second.second; |
5045 | int Pos = 0; |
5046 | for (auto &Val : Record) { |
5047 | 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\"" , "/build/llvm-toolchain-snapshot-8~svn345461/lib/Bitcode/Reader/BitcodeReader.cpp" , 5047, __PRETTY_FUNCTION__)); |
5048 | Hash[Pos++] = Val; |
5049 | } |
5050 | break; |
5051 | } |
5052 | /// MODULE_CODE_VSTOFFSET: [offset] |
5053 | case bitc::MODULE_CODE_VSTOFFSET: |
5054 | if (Record.size() < 1) |
5055 | return error("Invalid record"); |
5056 | // Note that we subtract 1 here because the offset is relative to one |
5057 | // word before the start of the identification or module block, which |
5058 | // was historically always the start of the regular bitcode header. |
5059 | VSTOffset = Record[0] - 1; |
5060 | break; |
5061 | // v1 GLOBALVAR: [pointer type, isconst, initid, linkage, ...] |
5062 | // v1 FUNCTION: [type, callingconv, isproto, linkage, ...] |
5063 | // v1 ALIAS: [alias type, addrspace, aliasee val#, linkage, ...] |
5064 | // v2: [strtab offset, strtab size, v1] |
5065 | case bitc::MODULE_CODE_GLOBALVAR: |
5066 | case bitc::MODULE_CODE_FUNCTION: |
5067 | case bitc::MODULE_CODE_ALIAS: { |
5068 | StringRef Name; |
5069 | ArrayRef<uint64_t> GVRecord; |
5070 | std::tie(Name, GVRecord) = readNameFromStrtab(Record); |
5071 | if (GVRecord.size() <= 3) |
5072 | return error("Invalid record"); |
5073 | uint64_t RawLinkage = GVRecord[3]; |
5074 | GlobalValue::LinkageTypes Linkage = getDecodedLinkage(RawLinkage); |
5075 | if (!UseStrtab) { |
5076 | ValueIdToLinkageMap[ValueId++] = Linkage; |
5077 | break; |
5078 | } |
5079 | |
5080 | setValueGUID(ValueId++, Name, Linkage, SourceFileName); |
5081 | break; |
5082 | } |
5083 | } |
5084 | } |
5085 | continue; |
5086 | } |
5087 | } |
5088 | } |
5089 | |
5090 | std::vector<ValueInfo> |
5091 | ModuleSummaryIndexBitcodeReader::makeRefList(ArrayRef<uint64_t> Record) { |
5092 | std::vector<ValueInfo> Ret; |
5093 | Ret.reserve(Record.size()); |
5094 | for (uint64_t RefValueId : Record) |
5095 | Ret.push_back(getValueInfoFromValueId(RefValueId).first); |
5096 | return Ret; |
5097 | } |
5098 | |
5099 | std::vector<FunctionSummary::EdgeTy> |
5100 | ModuleSummaryIndexBitcodeReader::makeCallList(ArrayRef<uint64_t> Record, |
5101 | bool IsOldProfileFormat, |
5102 | bool HasProfile, bool HasRelBF) { |
5103 | std::vector<FunctionSummary::EdgeTy> Ret; |
5104 | Ret.reserve(Record.size()); |
5105 | for (unsigned I = 0, E = Record.size(); I != E; ++I) { |
5106 | CalleeInfo::HotnessType Hotness = CalleeInfo::HotnessType::Unknown; |
5107 | uint64_t RelBF = 0; |
5108 | ValueInfo Callee = getValueInfoFromValueId(Record[I]).first; |
5109 | if (IsOldProfileFormat) { |
5110 | I += 1; // Skip old callsitecount field |
5111 | if (HasProfile) |
5112 | I += 1; // Skip old profilecount field |
5113 | } else if (HasProfile) |
5114 | Hotness = static_cast<CalleeInfo::HotnessType>(Record[++I]); |
5115 | else if (HasRelBF) |
5116 | RelBF = Record[++I]; |
5117 | Ret.push_back(FunctionSummary::EdgeTy{Callee, CalleeInfo(Hotness, RelBF)}); |
5118 | } |
5119 | return Ret; |
5120 | } |
5121 | |
5122 | static void |
5123 | parseWholeProgramDevirtResolutionByArg(ArrayRef<uint64_t> Record, size_t &Slot, |
5124 | WholeProgramDevirtResolution &Wpd) { |
5125 | uint64_t ArgNum = Record[Slot++]; |
5126 | WholeProgramDevirtResolution::ByArg &B = |
5127 | Wpd.ResByArg[{Record.begin() + Slot, Record.begin() + Slot + ArgNum}]; |
5128 | Slot += ArgNum; |
5129 | |
5130 | B.TheKind = |
5131 | static_cast<WholeProgramDevirtResolution::ByArg::Kind>(Record[Slot++]); |
5132 | B.Info = Record[Slot++]; |
5133 | B.Byte = Record[Slot++]; |
5134 | B.Bit = Record[Slot++]; |
5135 | } |
5136 | |
5137 | static void parseWholeProgramDevirtResolution(ArrayRef<uint64_t> Record, |
5138 | StringRef Strtab, size_t &Slot, |
5139 | TypeIdSummary &TypeId) { |
5140 | uint64_t Id = Record[Slot++]; |
5141 | WholeProgramDevirtResolution &Wpd = TypeId.WPDRes[Id]; |
5142 | |
5143 | Wpd.TheKind = static_cast<WholeProgramDevirtResolution::Kind>(Record[Slot++]); |
5144 | Wpd.SingleImplName = {Strtab.data() + Record[Slot], |
5145 | static_cast<size_t>(Record[Slot + 1])}; |
5146 | Slot += 2; |
5147 | |
5148 | uint64_t ResByArgNum = Record[Slot++]; |
5149 | for (uint64_t I = 0; I != ResByArgNum; ++I) |
5150 | parseWholeProgramDevirtResolutionByArg(Record, Slot, Wpd); |
5151 | } |
5152 | |
5153 | static void parseTypeIdSummaryRecord(ArrayRef<uint64_t> Record, |
5154 | StringRef Strtab, |
5155 | ModuleSummaryIndex &TheIndex) { |
5156 | size_t Slot = 0; |
5157 | TypeIdSummary &TypeId = TheIndex.getOrInsertTypeIdSummary( |
5158 | {Strtab.data() + Record[Slot], static_cast<size_t>(Record[Slot + 1])}); |
5159 | Slot += 2; |
5160 | |
5161 | TypeId.TTRes.TheKind = static_cast<TypeTestResolution::Kind>(Record[Slot++]); |
5162 | TypeId.TTRes.SizeM1BitWidth = Record[Slot++]; |
5163 | TypeId.TTRes.AlignLog2 = Record[Slot++]; |
5164 | TypeId.TTRes.SizeM1 = Record[Slot++]; |
5165 | TypeId.TTRes.BitMask = Record[Slot++]; |
5166 | TypeId.TTRes.InlineBits = Record[Slot++]; |
5167 | |
5168 | while (Slot < Record.size()) |
5169 | parseWholeProgramDevirtResolution(Record, Strtab, Slot, TypeId); |
5170 | } |
5171 | |
5172 | // Eagerly parse the entire summary block. This populates the GlobalValueSummary |
5173 | // objects in the index. |
5174 | Error ModuleSummaryIndexBitcodeReader::parseEntireSummary(unsigned ID) { |
5175 | if (Stream.EnterSubBlock(ID)) |
5176 | return error("Invalid record"); |
5177 | SmallVector<uint64_t, 64> Record; |
5178 | |
5179 | // Parse version |
5180 | { |
5181 | BitstreamEntry Entry = Stream.advanceSkippingSubblocks(); |
5182 | if (Entry.Kind != BitstreamEntry::Record) |
5183 | return error("Invalid Summary Block: record for version expected"); |
5184 | if (Stream.readRecord(Entry.ID, Record) != bitc::FS_VERSION) |
5185 | return error("Invalid Summary Block: version expected"); |
5186 | } |
5187 | const uint64_t Version = Record[0]; |
5188 | const bool IsOldProfileFormat = Version == 1; |
5189 | if (Version < 1 || Version > 4) |
5190 | return error("Invalid summary version " + Twine(Version) + |
5191 | ", 1, 2, 3 or 4 expected"); |
5192 | Record.clear(); |
5193 | |
5194 | // Keep around the last seen summary to be used when we see an optional |
5195 | // "OriginalName" attachement. |
5196 | GlobalValueSummary *LastSeenSummary = nullptr; |
5197 | GlobalValue::GUID LastSeenGUID = 0; |
5198 | |
5199 | // We can expect to see any number of type ID information records before |
5200 | // each function summary records; these variables store the information |
5201 | // collected so far so that it can be used to create the summary object. |
5202 | std::vector<GlobalValue::GUID> PendingTypeTests; |
5203 | std::vector<FunctionSummary::VFuncId> PendingTypeTestAssumeVCalls, |
5204 | PendingTypeCheckedLoadVCalls; |
5205 | std::vector<FunctionSummary::ConstVCall> PendingTypeTestAssumeConstVCalls, |
5206 | PendingTypeCheckedLoadConstVCalls; |
5207 | |
5208 | while (true) { |
5209 | BitstreamEntry Entry = Stream.advanceSkippingSubblocks(); |
5210 | |
5211 | switch (Entry.Kind) { |
5212 | case BitstreamEntry::SubBlock: // Handled for us already. |
5213 | case BitstreamEntry::Error: |
5214 | return error("Malformed block"); |
5215 | case BitstreamEntry::EndBlock: |
5216 | return Error::success(); |
5217 | case BitstreamEntry::Record: |
5218 | // The interesting case. |
5219 | break; |
5220 | } |
5221 | |
5222 | // Read a record. The record format depends on whether this |
5223 | // is a per-module index or a combined index file. In the per-module |
5224 | // case the records contain the associated value's ID for correlation |
5225 | // with VST entries. In the combined index the correlation is done |
5226 | // via the bitcode offset of the summary records (which were saved |
5227 | // in the combined index VST entries). The records also contain |
5228 | // information used for ThinLTO renaming and importing. |
5229 | Record.clear(); |
5230 | auto BitCode = Stream.readRecord(Entry.ID, Record); |
5231 | switch (BitCode) { |
5232 | default: // Default behavior: ignore. |
5233 | break; |
5234 | case bitc::FS_FLAGS: { // [flags] |
5235 | uint64_t Flags = Record[0]; |
5236 | // Scan flags (set only on the combined index). |
5237 | assert(Flags <= 0x3 && "Unexpected bits in flag")((Flags <= 0x3 && "Unexpected bits in flag") ? static_cast <void> (0) : __assert_fail ("Flags <= 0x3 && \"Unexpected bits in flag\"" , "/build/llvm-toolchain-snapshot-8~svn345461/lib/Bitcode/Reader/BitcodeReader.cpp" , 5237, __PRETTY_FUNCTION__)); |
5238 | |
5239 | // 1 bit: WithGlobalValueDeadStripping flag. |
5240 | if (Flags & 0x1) |
5241 | TheIndex.setWithGlobalValueDeadStripping(); |
5242 | // 1 bit: SkipModuleByDistributedBackend flag. |
5243 | if (Flags & 0x2) |
5244 | TheIndex.setSkipModuleByDistributedBackend(); |
5245 | break; |
5246 | } |
5247 | case bitc::FS_VALUE_GUID: { // [valueid, refguid] |
5248 | uint64_t ValueID = Record[0]; |
5249 | GlobalValue::GUID RefGUID = Record[1]; |
5250 | ValueIdToValueInfoMap[ValueID] = |
5251 | std::make_pair(TheIndex.getOrInsertValueInfo(RefGUID), RefGUID); |
5252 | break; |
5253 | } |
5254 | // FS_PERMODULE: [valueid, flags, instcount, fflags, numrefs, |
5255 | // numrefs x valueid, n x (valueid)] |
5256 | // FS_PERMODULE_PROFILE: [valueid, flags, instcount, fflags, numrefs, |
5257 | // numrefs x valueid, |
5258 | // n x (valueid, hotness)] |
5259 | // FS_PERMODULE_RELBF: [valueid, flags, instcount, fflags, numrefs, |
5260 | // numrefs x valueid, |
5261 | // n x (valueid, relblockfreq)] |
5262 | case bitc::FS_PERMODULE: |
5263 | case bitc::FS_PERMODULE_RELBF: |
5264 | case bitc::FS_PERMODULE_PROFILE: { |
5265 | unsigned ValueID = Record[0]; |
5266 | uint64_t RawFlags = Record[1]; |
5267 | unsigned InstCount = Record[2]; |
5268 | uint64_t RawFunFlags = 0; |
5269 | unsigned NumRefs = Record[3]; |
5270 | int RefListStartIndex = 4; |
5271 | if (Version >= 4) { |
5272 | RawFunFlags = Record[3]; |
5273 | NumRefs = Record[4]; |
5274 | RefListStartIndex = 5; |
5275 | } |
5276 | |
5277 | auto Flags = getDecodedGVSummaryFlags(RawFlags, Version); |
5278 | // The module path string ref set in the summary must be owned by the |
5279 | // index's module string table. Since we don't have a module path |
5280 | // string table section in the per-module index, we create a single |
5281 | // module path string table entry with an empty (0) ID to take |
5282 | // ownership. |
5283 | int CallGraphEdgeStartIndex = RefListStartIndex + NumRefs; |
5284 | 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\"" , "/build/llvm-toolchain-snapshot-8~svn345461/lib/Bitcode/Reader/BitcodeReader.cpp" , 5285, __PRETTY_FUNCTION__)) |
5285 | "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\"" , "/build/llvm-toolchain-snapshot-8~svn345461/lib/Bitcode/Reader/BitcodeReader.cpp" , 5285, __PRETTY_FUNCTION__)); |
5286 | std::vector<ValueInfo> Refs = makeRefList( |
5287 | ArrayRef<uint64_t>(Record).slice(RefListStartIndex, NumRefs)); |
5288 | bool HasProfile = (BitCode == bitc::FS_PERMODULE_PROFILE); |
5289 | bool HasRelBF = (BitCode == bitc::FS_PERMODULE_RELBF); |
5290 | std::vector<FunctionSummary::EdgeTy> Calls = makeCallList( |
5291 | ArrayRef<uint64_t>(Record).slice(CallGraphEdgeStartIndex), |
5292 | IsOldProfileFormat, HasProfile, HasRelBF); |
5293 | auto FS = llvm::make_unique<FunctionSummary>( |
5294 | Flags, InstCount, getDecodedFFlags(RawFunFlags), std::move(Refs), |
5295 | std::move(Calls), std::move(PendingTypeTests), |
5296 | std::move(PendingTypeTestAssumeVCalls), |
5297 | std::move(PendingTypeCheckedLoadVCalls), |
5298 | std::move(PendingTypeTestAssumeConstVCalls), |
5299 | std::move(PendingTypeCheckedLoadConstVCalls)); |
5300 | PendingTypeTests.clear(); |
5301 | PendingTypeTestAssumeVCalls.clear(); |
5302 | PendingTypeCheckedLoadVCalls.clear(); |
5303 | PendingTypeTestAssumeConstVCalls.clear(); |
5304 | PendingTypeCheckedLoadConstVCalls.clear(); |
5305 | auto VIAndOriginalGUID = getValueInfoFromValueId(ValueID); |
5306 | FS->setModulePath(getThisModule()->first()); |
5307 | FS->setOriginalName(VIAndOriginalGUID.second); |
5308 | TheIndex.addGlobalValueSummary(VIAndOriginalGUID.first, std::move(FS)); |
5309 | break; |
5310 | } |
5311 | // FS_ALIAS: [valueid, flags, valueid] |
5312 | // Aliases must be emitted (and parsed) after all FS_PERMODULE entries, as |
5313 | // they expect all aliasee summaries to be available. |
5314 | case bitc::FS_ALIAS: { |
5315 | unsigned ValueID = Record[0]; |
5316 | uint64_t RawFlags = Record[1]; |
5317 | unsigned AliaseeID = Record[2]; |
5318 | auto Flags = getDecodedGVSummaryFlags(RawFlags, Version); |
5319 | auto AS = llvm::make_unique<AliasSummary>(Flags); |
5320 | // The module path string ref set in the summary must be owned by the |
5321 | // index's module string table. Since we don't have a module path |
5322 | // string table section in the per-module index, we create a single |
5323 | // module path string table entry with an empty (0) ID to take |
5324 | // ownership. |
5325 | AS->setModulePath(getThisModule()->first()); |
5326 | |
5327 | GlobalValue::GUID AliaseeGUID = |
5328 | getValueInfoFromValueId(AliaseeID).first.getGUID(); |
5329 | auto AliaseeInModule = |
5330 | TheIndex.findSummaryInModule(AliaseeGUID, ModulePath); |
5331 | if (!AliaseeInModule) |
5332 | return error("Alias expects aliasee summary to be parsed"); |
5333 | AS->setAliasee(AliaseeInModule); |
5334 | AS->setAliaseeGUID(AliaseeGUID); |
5335 | |
5336 | auto GUID = getValueInfoFromValueId(ValueID); |
5337 | AS->setOriginalName(GUID.second); |
5338 | TheIndex.addGlobalValueSummary(GUID.first, std::move(AS)); |
5339 | break; |
5340 | } |
5341 | // FS_PERMODULE_GLOBALVAR_INIT_REFS: [valueid, flags, n x valueid] |
5342 | case bitc::FS_PERMODULE_GLOBALVAR_INIT_REFS: { |
5343 | unsigned ValueID = Record[0]; |
5344 | uint64_t RawFlags = Record[1]; |
5345 | auto Flags = getDecodedGVSummaryFlags(RawFlags, Version); |
5346 | std::vector<ValueInfo> Refs = |
5347 | makeRefList(ArrayRef<uint64_t>(Record).slice(2)); |
5348 | auto FS = llvm::make_unique<GlobalVarSummary>(Flags, std::move(Refs)); |
5349 | FS->setModulePath(getThisModule()->first()); |
5350 | auto GUID = getValueInfoFromValueId(ValueID); |
5351 | FS->setOriginalName(GUID.second); |
5352 | TheIndex.addGlobalValueSummary(GUID.first, std::move(FS)); |
5353 | break; |
5354 | } |
5355 | // FS_COMBINED: [valueid, modid, flags, instcount, fflags, numrefs, |
5356 | // numrefs x valueid, n x (valueid)] |
5357 | // FS_COMBINED_PROFILE: [valueid, modid, flags, instcount, fflags, numrefs, |
5358 | // numrefs x valueid, n x (valueid, hotness)] |
5359 | case bitc::FS_COMBINED: |
5360 | case bitc::FS_COMBINED_PROFILE: { |
5361 | unsigned ValueID = Record[0]; |
5362 | uint64_t ModuleId = Record[1]; |
5363 | uint64_t RawFlags = Record[2]; |
5364 | unsigned InstCount = Record[3]; |
5365 | uint64_t RawFunFlags = 0; |
5366 | unsigned NumRefs = Record[4]; |
5367 | int RefListStartIndex = 5; |
5368 | |
5369 | if (Version >= 4) { |
5370 | RawFunFlags = Record[4]; |
5371 | NumRefs = Record[5]; |
5372 | RefListStartIndex = 6; |
5373 | } |
5374 | |
5375 | auto Flags = getDecodedGVSummaryFlags(RawFlags, Version); |
5376 | int CallGraphEdgeStartIndex = RefListStartIndex + NumRefs; |
5377 | 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\"" , "/build/llvm-toolchain-snapshot-8~svn345461/lib/Bitcode/Reader/BitcodeReader.cpp" , 5378, __PRETTY_FUNCTION__)) |
5378 | "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\"" , "/build/llvm-toolchain-snapshot-8~svn345461/lib/Bitcode/Reader/BitcodeReader.cpp" , 5378, __PRETTY_FUNCTION__)); |
5379 | std::vector<ValueInfo> Refs = makeRefList( |
5380 | ArrayRef<uint64_t>(Record).slice(RefListStartIndex, NumRefs)); |
5381 | bool HasProfile = (BitCode == bitc::FS_COMBINED_PROFILE); |
5382 | std::vector<FunctionSummary::EdgeTy> Edges = makeCallList( |
5383 | ArrayRef<uint64_t>(Record).slice(CallGraphEdgeStartIndex), |
5384 | IsOldProfileFormat, HasProfile, false); |
5385 | ValueInfo VI = getValueInfoFromValueId(ValueID).first; |
5386 | auto FS = llvm::make_unique<FunctionSummary>( |
5387 | Flags, InstCount, getDecodedFFlags(RawFunFlags), std::move(Refs), |
5388 | std::move(Edges), std::move(PendingTypeTests), |
5389 | std::move(PendingTypeTestAssumeVCalls), |
5390 | std::move(PendingTypeCheckedLoadVCalls), |
5391 | std::move(PendingTypeTestAssumeConstVCalls), |
5392 | std::move(PendingTypeCheckedLoadConstVCalls)); |
5393 | PendingTypeTests.clear(); |
5394 | PendingTypeTestAssumeVCalls.clear(); |
5395 | PendingTypeCheckedLoadVCalls.clear(); |
5396 | PendingTypeTestAssumeConstVCalls.clear(); |
5397 | PendingTypeCheckedLoadConstVCalls.clear(); |
5398 | LastSeenSummary = FS.get(); |
5399 | LastSeenGUID = VI.getGUID(); |
5400 | FS->setModulePath(ModuleIdMap[ModuleId]); |
5401 | TheIndex.addGlobalValueSummary(VI, std::move(FS)); |
5402 | break; |
5403 | } |
5404 | // FS_COMBINED_ALIAS: [valueid, modid, flags, valueid] |
5405 | // Aliases must be emitted (and parsed) after all FS_COMBINED entries, as |
5406 | // they expect all aliasee summaries to be available. |
5407 | case bitc::FS_COMBINED_ALIAS: { |
5408 | unsigned ValueID = Record[0]; |
5409 | uint64_t ModuleId = Record[1]; |
5410 | uint64_t RawFlags = Record[2]; |
5411 | unsigned AliaseeValueId = Record[3]; |
5412 | auto Flags = getDecodedGVSummaryFlags(RawFlags, Version); |
5413 | auto AS = llvm::make_unique<AliasSummary>(Flags); |
5414 | LastSeenSummary = AS.get(); |
5415 | AS->setModulePath(ModuleIdMap[ModuleId]); |
5416 | |
5417 | auto AliaseeGUID = |
5418 | getValueInfoFromValueId(AliaseeValueId).first.getGUID(); |
5419 | auto AliaseeInModule = |
5420 | TheIndex.findSummaryInModule(AliaseeGUID, AS->modulePath()); |
5421 | AS->setAliasee(AliaseeInModule); |
5422 | AS->setAliaseeGUID(AliaseeGUID); |
5423 | |
5424 | ValueInfo VI = getValueInfoFromValueId(ValueID).first; |
5425 | LastSeenGUID = VI.getGUID(); |
5426 | TheIndex.addGlobalValueSummary(VI, std::move(AS)); |
5427 | break; |
5428 | } |
5429 | // FS_COMBINED_GLOBALVAR_INIT_REFS: [valueid, modid, flags, n x valueid] |
5430 | case bitc::FS_COMBINED_GLOBALVAR_INIT_REFS: { |
5431 | unsigned ValueID = Record[0]; |
5432 | uint64_t ModuleId = Record[1]; |
5433 | uint64_t RawFlags = Record[2]; |
5434 | auto Flags = getDecodedGVSummaryFlags(RawFlags, Version); |
5435 | std::vector<ValueInfo> Refs = |
5436 | makeRefList(ArrayRef<uint64_t>(Record).slice(3)); |
5437 | auto FS = llvm::make_unique<GlobalVarSummary>(Flags, std::move(Refs)); |
5438 | LastSeenSummary = FS.get(); |
5439 | FS->setModulePath(ModuleIdMap[ModuleId]); |
5440 | ValueInfo VI = getValueInfoFromValueId(ValueID).first; |
5441 | LastSeenGUID = VI.getGUID(); |
5442 | TheIndex.addGlobalValueSummary(VI, std::move(FS)); |
5443 | break; |
5444 | } |
5445 | // FS_COMBINED_ORIGINAL_NAME: [original_name] |
5446 | case bitc::FS_COMBINED_ORIGINAL_NAME: { |
5447 | uint64_t OriginalName = Record[0]; |
5448 | if (!LastSeenSummary) |
5449 | return error("Name attachment that does not follow a combined record"); |
5450 | LastSeenSummary->setOriginalName(OriginalName); |
5451 | TheIndex.addOriginalName(LastSeenGUID, OriginalName); |
5452 | // Reset the LastSeenSummary |
5453 | LastSeenSummary = nullptr; |
5454 | LastSeenGUID = 0; |
5455 | break; |
5456 | } |
5457 | case bitc::FS_TYPE_TESTS: |
5458 | assert(PendingTypeTests.empty())((PendingTypeTests.empty()) ? static_cast<void> (0) : __assert_fail ("PendingTypeTests.empty()", "/build/llvm-toolchain-snapshot-8~svn345461/lib/Bitcode/Reader/BitcodeReader.cpp" , 5458, __PRETTY_FUNCTION__)); |
5459 | PendingTypeTests.insert(PendingTypeTests.end(), Record.begin(), |
5460 | Record.end()); |
5461 | break; |
5462 | |
5463 | case bitc::FS_TYPE_TEST_ASSUME_VCALLS: |
5464 | assert(PendingTypeTestAssumeVCalls.empty())((PendingTypeTestAssumeVCalls.empty()) ? static_cast<void> (0) : __assert_fail ("PendingTypeTestAssumeVCalls.empty()", "/build/llvm-toolchain-snapshot-8~svn345461/lib/Bitcode/Reader/BitcodeReader.cpp" , 5464, __PRETTY_FUNCTION__)); |
5465 | for (unsigned I = 0; I != Record.size(); I += 2) |
5466 | PendingTypeTestAssumeVCalls.push_back({Record[I], Record[I+1]}); |
5467 | break; |
5468 | |
5469 | case bitc::FS_TYPE_CHECKED_LOAD_VCALLS: |
5470 | assert(PendingTypeCheckedLoadVCalls.empty())((PendingTypeCheckedLoadVCalls.empty()) ? static_cast<void > (0) : __assert_fail ("PendingTypeCheckedLoadVCalls.empty()" , "/build/llvm-toolchain-snapshot-8~svn345461/lib/Bitcode/Reader/BitcodeReader.cpp" , 5470, __PRETTY_FUNCTION__)); |
5471 | for (unsigned I = 0; I != Record.size(); I += 2) |
5472 | PendingTypeCheckedLoadVCalls.push_back({Record[I], Record[I+1]}); |
5473 | break; |
5474 | |
5475 | case bitc::FS_TYPE_TEST_ASSUME_CONST_VCALL: |
5476 | PendingTypeTestAssumeConstVCalls.push_back( |
5477 | {{Record[0], Record[1]}, {Record.begin() + 2, Record.end()}}); |
5478 | break; |
5479 | |
5480 | case bitc::FS_TYPE_CHECKED_LOAD_CONST_VCALL: |
5481 | PendingTypeCheckedLoadConstVCalls.push_back( |
5482 | {{Record[0], Record[1]}, {Record.begin() + 2, Record.end()}}); |
5483 | break; |
5484 | |
5485 | case bitc::FS_CFI_FUNCTION_DEFS: { |
5486 | std::set<std::string> &CfiFunctionDefs = TheIndex.cfiFunctionDefs(); |
5487 | for (unsigned I = 0; I != Record.size(); I += 2) |
5488 | CfiFunctionDefs.insert( |
5489 | {Strtab.data() + Record[I], static_cast<size_t>(Record[I + 1])}); |
5490 | break; |
5491 | } |
5492 | |
5493 | case bitc::FS_CFI_FUNCTION_DECLS: { |
5494 | std::set<std::string> &CfiFunctionDecls = TheIndex.cfiFunctionDecls(); |
5495 | for (unsigned I = 0; I != Record.size(); I += 2) |
5496 | CfiFunctionDecls.insert( |
5497 | {Strtab.data() + Record[I], static_cast<size_t>(Record[I + 1])}); |
5498 | break; |
5499 | } |
5500 | |
5501 | case bitc::FS_TYPE_ID: |
5502 | parseTypeIdSummaryRecord(Record, Strtab, TheIndex); |
5503 | break; |
5504 | } |
5505 | } |
5506 | llvm_unreachable("Exit infinite loop")::llvm::llvm_unreachable_internal("Exit infinite loop", "/build/llvm-toolchain-snapshot-8~svn345461/lib/Bitcode/Reader/BitcodeReader.cpp" , 5506); |
5507 | } |
5508 | |
5509 | // Parse the module string table block into the Index. |
5510 | // This populates the ModulePathStringTable map in the index. |
5511 | Error ModuleSummaryIndexBitcodeReader::parseModuleStringTable() { |
5512 | if (Stream.EnterSubBlock(bitc::MODULE_STRTAB_BLOCK_ID)) |
5513 | return error("Invalid record"); |
5514 | |
5515 | SmallVector<uint64_t, 64> Record; |
5516 | |
5517 | SmallString<128> ModulePath; |
5518 | ModuleSummaryIndex::ModuleInfo *LastSeenModule = nullptr; |
5519 | |
5520 | while (true) { |
5521 | BitstreamEntry Entry = Stream.advanceSkippingSubblocks(); |
5522 | |
5523 | switch (Entry.Kind) { |
5524 | case BitstreamEntry::SubBlock: // Handled for us already. |
5525 | case BitstreamEntry::Error: |
5526 | return error("Malformed block"); |
5527 | case BitstreamEntry::EndBlock: |
5528 | return Error::success(); |
5529 | case BitstreamEntry::Record: |
5530 | // The interesting case. |
5531 | break; |
5532 | } |
5533 | |
5534 | Record.clear(); |
5535 | switch (Stream.readRecord(Entry.ID, Record)) { |
5536 | default: // Default behavior: ignore. |
5537 | break; |
5538 | case bitc::MST_CODE_ENTRY: { |
5539 | // MST_ENTRY: [modid, namechar x N] |
5540 | uint64_t ModuleId = Record[0]; |
5541 | |
5542 | if (convertToString(Record, 1, ModulePath)) |
5543 | return error("Invalid record"); |
5544 | |
5545 | LastSeenModule = TheIndex.addModule(ModulePath, ModuleId); |
5546 | ModuleIdMap[ModuleId] = LastSeenModule->first(); |
5547 | |
5548 | ModulePath.clear(); |
5549 | break; |
5550 | } |
5551 | /// MST_CODE_HASH: [5*i32] |
5552 | case bitc::MST_CODE_HASH: { |
5553 | if (Record.size() != 5) |
5554 | return error("Invalid hash length " + Twine(Record.size()).str()); |
5555 | if (!LastSeenModule) |
5556 | return error("Invalid hash that does not follow a module path"); |
5557 | int Pos = 0; |
5558 | for (auto &Val : Record) { |
5559 | 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\"" , "/build/llvm-toolchain-snapshot-8~svn345461/lib/Bitcode/Reader/BitcodeReader.cpp" , 5559, __PRETTY_FUNCTION__)); |
5560 | LastSeenModule->second.second[Pos++] = Val; |
5561 | } |
5562 | // Reset LastSeenModule to avoid overriding the hash unexpectedly. |
5563 | LastSeenModule = nullptr; |
5564 | break; |
5565 | } |
5566 | } |
5567 | } |
5568 | llvm_unreachable("Exit infinite loop")::llvm::llvm_unreachable_internal("Exit infinite loop", "/build/llvm-toolchain-snapshot-8~svn345461/lib/Bitcode/Reader/BitcodeReader.cpp" , 5568); |
5569 | } |
5570 | |
5571 | namespace { |
5572 | |
5573 | // FIXME: This class is only here to support the transition to llvm::Error. It |
5574 | // will be removed once this transition is complete. Clients should prefer to |
5575 | // deal with the Error value directly, rather than converting to error_code. |
5576 | class BitcodeErrorCategoryType : public std::error_category { |
5577 | const char *name() const noexcept override { |
5578 | return "llvm.bitcode"; |
5579 | } |
5580 | |
5581 | std::string message(int IE) const override { |
5582 | BitcodeError E = static_cast<BitcodeError>(IE); |
5583 | switch (E) { |
5584 | case BitcodeError::CorruptedBitcode: |
5585 | return "Corrupted bitcode"; |
5586 | } |
5587 | llvm_unreachable("Unknown error type!")::llvm::llvm_unreachable_internal("Unknown error type!", "/build/llvm-toolchain-snapshot-8~svn345461/lib/Bitcode/Reader/BitcodeReader.cpp" , 5587); |
5588 | } |
5589 | }; |
5590 | |
5591 | } // end anonymous namespace |
5592 | |
5593 | static ManagedStatic<BitcodeErrorCategoryType> ErrorCategory; |
5594 | |
5595 | const std::error_category &llvm::BitcodeErrorCategory() { |
5596 | return *ErrorCategory; |
5597 | } |
5598 | |
5599 | static Expected<StringRef> readBlobInRecord(BitstreamCursor &Stream, |
5600 | unsigned Block, unsigned RecordID) { |
5601 | if (Stream.EnterSubBlock(Block)) |
5602 | return error("Invalid record"); |
5603 | |
5604 | StringRef Strtab; |
5605 | while (true) { |
5606 | BitstreamEntry Entry = Stream.advance(); |
5607 | switch (Entry.Kind) { |
5608 | case BitstreamEntry::EndBlock: |
5609 | return Strtab; |
5610 | |
5611 | case BitstreamEntry::Error: |
5612 | return error("Malformed block"); |
5613 | |
5614 | case BitstreamEntry::SubBlock: |
5615 | if (Stream.SkipBlock()) |
5616 | return error("Malformed block"); |
5617 | break; |
5618 | |
5619 | case BitstreamEntry::Record: |
5620 | StringRef Blob; |
5621 | SmallVector<uint64_t, 1> Record; |
5622 | if (Stream.readRecord(Entry.ID, Record, &Blob) == RecordID) |
5623 | Strtab = Blob; |
5624 | break; |
5625 | } |
5626 | } |
5627 | } |
5628 | |
5629 | //===----------------------------------------------------------------------===// |
5630 | // External interface |
5631 | //===----------------------------------------------------------------------===// |
5632 | |
5633 | Expected<std::vector<BitcodeModule>> |
5634 | llvm::getBitcodeModuleList(MemoryBufferRef Buffer) { |
5635 | auto FOrErr = getBitcodeFileContents(Buffer); |
5636 | if (!FOrErr) |
5637 | return FOrErr.takeError(); |
5638 | return std::move(FOrErr->Mods); |
5639 | } |
5640 | |
5641 | Expected<BitcodeFileContents> |
5642 | llvm::getBitcodeFileContents(MemoryBufferRef Buffer) { |
5643 | Expected<BitstreamCursor> StreamOrErr = initStream(Buffer); |
5644 | if (!StreamOrErr) |
5645 | return StreamOrErr.takeError(); |
5646 | BitstreamCursor &Stream = *StreamOrErr; |
5647 | |
5648 | BitcodeFileContents F; |
5649 | while (true) { |
5650 | uint64_t BCBegin = Stream.getCurrentByteNo(); |
5651 | |
5652 | // We may be consuming bitcode from a client that leaves garbage at the end |
5653 | // of the bitcode stream (e.g. Apple's ar tool). If we are close enough to |
5654 | // the end that there cannot possibly be another module, stop looking. |
5655 | if (BCBegin + 8 >= Stream.getBitcodeBytes().size()) |
5656 | return F; |
5657 | |
5658 | BitstreamEntry Entry = Stream.advance(); |
5659 | switch (Entry.Kind) { |
5660 | case BitstreamEntry::EndBlock: |
5661 | case BitstreamEntry::Error: |
5662 | return error("Malformed block"); |
5663 | |
5664 | case BitstreamEntry::SubBlock: { |
5665 | uint64_t IdentificationBit = -1ull; |
5666 | if (Entry.ID == bitc::IDENTIFICATION_BLOCK_ID) { |
5667 | IdentificationBit = Stream.GetCurrentBitNo() - BCBegin * 8; |
5668 | if (Stream.SkipBlock()) |
5669 | return error("Malformed block"); |
5670 | |
5671 | Entry = Stream.advance(); |
5672 | if (Entry.Kind != BitstreamEntry::SubBlock || |
5673 | Entry.ID != bitc::MODULE_BLOCK_ID) |
5674 | return error("Malformed block"); |
5675 | } |
5676 | |
5677 | if (Entry.ID == bitc::MODULE_BLOCK_ID) { |
5678 | uint64_t ModuleBit = Stream.GetCurrentBitNo() - BCBegin * 8; |
5679 | if (Stream.SkipBlock()) |
5680 | return error("Malformed block"); |
5681 | |
5682 | F.Mods.push_back({Stream.getBitcodeBytes().slice( |
5683 | BCBegin, Stream.getCurrentByteNo() - BCBegin), |
5684 | Buffer.getBufferIdentifier(), IdentificationBit, |
5685 | ModuleBit}); |
5686 | continue; |
5687 | } |
5688 | |
5689 | if (Entry.ID == bitc::STRTAB_BLOCK_ID) { |
5690 | Expected<StringRef> Strtab = |
5691 | readBlobInRecord(Stream, bitc::STRTAB_BLOCK_ID, bitc::STRTAB_BLOB); |
5692 | if (!Strtab) |
5693 | return Strtab.takeError(); |
5694 | // This string table is used by every preceding bitcode module that does |
5695 | // not have its own string table. A bitcode file may have multiple |
5696 | // string tables if it was created by binary concatenation, for example |
5697 | // with "llvm-cat -b". |
5698 | for (auto I = F.Mods.rbegin(), E = F.Mods.rend(); I != E; ++I) { |
5699 | if (!I->Strtab.empty()) |
5700 | break; |
5701 | I->Strtab = *Strtab; |
5702 | } |
5703 | // Similarly, the string table is used by every preceding symbol table; |
5704 | // normally there will be just one unless the bitcode file was created |
5705 | // by binary concatenation. |
5706 | if (!F.Symtab.empty() && F.StrtabForSymtab.empty()) |
5707 | F.StrtabForSymtab = *Strtab; |
5708 | continue; |
5709 | } |
5710 | |
5711 | if (Entry.ID == bitc::SYMTAB_BLOCK_ID) { |
5712 | Expected<StringRef> SymtabOrErr = |
5713 | readBlobInRecord(Stream, bitc::SYMTAB_BLOCK_ID, bitc::SYMTAB_BLOB); |
5714 | if (!SymtabOrErr) |
5715 | return SymtabOrErr.takeError(); |
5716 | |
5717 | // We can expect the bitcode file to have multiple symbol tables if it |
5718 | // was created by binary concatenation. In that case we silently |
5719 | // ignore any subsequent symbol tables, which is fine because this is a |
5720 | // low level function. The client is expected to notice that the number |
5721 | // of modules in the symbol table does not match the number of modules |
5722 | // in the input file and regenerate the symbol table. |
5723 | if (F.Symtab.empty()) |
5724 | F.Symtab = *SymtabOrErr; |
5725 | continue; |
5726 | } |
5727 | |
5728 | if (Stream.SkipBlock()) |
5729 | return error("Malformed block"); |
5730 | continue; |
5731 | } |
5732 | case BitstreamEntry::Record: |
5733 | Stream.skipRecord(Entry.ID); |
5734 | continue; |
5735 | } |
5736 | } |
5737 | } |
5738 | |
5739 | /// Get a lazy one-at-time loading module from bitcode. |
5740 | /// |
5741 | /// This isn't always used in a lazy context. In particular, it's also used by |
5742 | /// \a parseModule(). If this is truly lazy, then we need to eagerly pull |
5743 | /// in forward-referenced functions from block address references. |
5744 | /// |
5745 | /// \param[in] MaterializeAll Set to \c true if we should materialize |
5746 | /// everything. |
5747 | Expected<std::unique_ptr<Module>> |
5748 | BitcodeModule::getModuleImpl(LLVMContext &Context, bool MaterializeAll, |
5749 | bool ShouldLazyLoadMetadata, bool IsImporting) { |
5750 | BitstreamCursor Stream(Buffer); |
5751 | |
5752 | std::string ProducerIdentification; |
5753 | if (IdentificationBit != -1ull) { |
5754 | Stream.JumpToBit(IdentificationBit); |
5755 | Expected<std::string> ProducerIdentificationOrErr = |
5756 | readIdentificationBlock(Stream); |
5757 | if (!ProducerIdentificationOrErr) |
5758 | return ProducerIdentificationOrErr.takeError(); |
5759 | |
5760 | ProducerIdentification = *ProducerIdentificationOrErr; |
5761 | } |
5762 | |
5763 | Stream.JumpToBit(ModuleBit); |
5764 | auto *R = new BitcodeReader(std::move(Stream), Strtab, ProducerIdentification, |
5765 | Context); |
5766 | |
5767 | std::unique_ptr<Module> M = |
5768 | llvm::make_unique<Module>(ModuleIdentifier, Context); |
5769 | M->setMaterializer(R); |
5770 | |
5771 | // Delay parsing Metadata if ShouldLazyLoadMetadata is true. |
5772 | if (Error Err = |
5773 | R->parseBitcodeInto(M.get(), ShouldLazyLoadMetadata, IsImporting)) |
5774 | return std::move(Err); |
5775 | |
5776 | if (MaterializeAll) { |
5777 | // Read in the entire module, and destroy the BitcodeReader. |
5778 | if (Error Err = M->materializeAll()) |
5779 | return std::move(Err); |
5780 | } else { |
5781 | // Resolve forward references from blockaddresses. |
5782 | if (Error Err = R->materializeForwardReferencedFunctions()) |
5783 | return std::move(Err); |
5784 | } |
5785 | return std::move(M); |
5786 | } |
5787 | |
5788 | Expected<std::unique_ptr<Module>> |
5789 | BitcodeModule::getLazyModule(LLVMContext &Context, bool ShouldLazyLoadMetadata, |
5790 | bool IsImporting) { |
5791 | return getModuleImpl(Context, false, ShouldLazyLoadMetadata, IsImporting); |
5792 | } |
5793 | |
5794 | // Parse the specified bitcode buffer and merge the index into CombinedIndex. |
5795 | // We don't use ModuleIdentifier here because the client may need to control the |
5796 | // module path used in the combined summary (e.g. when reading summaries for |
5797 | // regular LTO modules). |
5798 | Error BitcodeModule::readSummary(ModuleSummaryIndex &CombinedIndex, |
5799 | StringRef ModulePath, uint64_t ModuleId) { |
5800 | BitstreamCursor Stream(Buffer); |
5801 | Stream.JumpToBit(ModuleBit); |
5802 | |
5803 | ModuleSummaryIndexBitcodeReader R(std::move(Stream), Strtab, CombinedIndex, |
5804 | ModulePath, ModuleId); |
5805 | return R.parseModule(); |
5806 | } |
5807 | |
5808 | // Parse the specified bitcode buffer, returning the function info index. |
5809 | Expected<std::unique_ptr<ModuleSummaryIndex>> BitcodeModule::getSummary() { |
5810 | BitstreamCursor Stream(Buffer); |
5811 | Stream.JumpToBit(ModuleBit); |
5812 | |
5813 | auto Index = llvm::make_unique<ModuleSummaryIndex>(/*HaveGVs=*/false); |
5814 | ModuleSummaryIndexBitcodeReader R(std::move(Stream), Strtab, *Index, |
5815 | ModuleIdentifier, 0); |
5816 | |
5817 | if (Error Err = R.parseModule()) |
5818 | return std::move(Err); |
5819 | |
5820 | return std::move(Index); |
5821 | } |
5822 | |
5823 | // Check if the given bitcode buffer contains a global value summary block. |
5824 | Expected<BitcodeLTOInfo> BitcodeModule::getLTOInfo() { |
5825 | BitstreamCursor Stream(Buffer); |
5826 | Stream.JumpToBit(ModuleBit); |
5827 | |
5828 | if (Stream.EnterSubBlock(bitc::MODULE_BLOCK_ID)) |
5829 | return error("Invalid record"); |
5830 | |
5831 | while (true) { |
5832 | BitstreamEntry Entry = Stream.advance(); |
5833 | |
5834 | switch (Entry.Kind) { |
5835 | case BitstreamEntry::Error: |
5836 | return error("Malformed block"); |
5837 | case BitstreamEntry::EndBlock: |
5838 | return BitcodeLTOInfo{/*IsThinLTO=*/false, /*HasSummary=*/false}; |
5839 | |
5840 | case BitstreamEntry::SubBlock: |
5841 | if (Entry.ID == bitc::GLOBALVAL_SUMMARY_BLOCK_ID) |
5842 | return BitcodeLTOInfo{/*IsThinLTO=*/true, /*HasSummary=*/true}; |
5843 | |
5844 | if (Entry.ID == bitc::FULL_LTO_GLOBALVAL_SUMMARY_BLOCK_ID) |
5845 | return BitcodeLTOInfo{/*IsThinLTO=*/false, /*HasSummary=*/true}; |
5846 | |
5847 | // Ignore other sub-blocks. |
5848 | if (Stream.SkipBlock()) |
5849 | return error("Malformed block"); |
5850 | continue; |
5851 | |
5852 | case BitstreamEntry::Record: |
5853 | Stream.skipRecord(Entry.ID); |
5854 | continue; |
5855 | } |
5856 | } |
5857 | } |
5858 | |
5859 | static Expected<BitcodeModule> getSingleModule(MemoryBufferRef Buffer) { |
5860 | Expected<std::vector<BitcodeModule>> MsOrErr = getBitcodeModuleList(Buffer); |
5861 | if (!MsOrErr) |
5862 | return MsOrErr.takeError(); |
5863 | |
5864 | if (MsOrErr->size() != 1) |
5865 | return error("Expected a single module"); |
5866 | |
5867 | return (*MsOrErr)[0]; |
5868 | } |
5869 | |
5870 | Expected<std::unique_ptr<Module>> |
5871 | llvm::getLazyBitcodeModule(MemoryBufferRef Buffer, LLVMContext &Context, |
5872 | bool ShouldLazyLoadMetadata, bool IsImporting) { |
5873 | Expected<BitcodeModule> BM = getSingleModule(Buffer); |
5874 | if (!BM) |
5875 | return BM.takeError(); |
5876 | |
5877 | return BM->getLazyModule(Context, ShouldLazyLoadMetadata, IsImporting); |
5878 | } |
5879 | |
5880 | Expected<std::unique_ptr<Module>> llvm::getOwningLazyBitcodeModule( |
5881 | std::unique_ptr<MemoryBuffer> &&Buffer, LLVMContext &Context, |
5882 | bool ShouldLazyLoadMetadata, bool IsImporting) { |
5883 | auto MOrErr = getLazyBitcodeModule(*Buffer, Context, ShouldLazyLoadMetadata, |
5884 | IsImporting); |
5885 | if (MOrErr) |
5886 | (*MOrErr)->setOwnedMemoryBuffer(std::move(Buffer)); |
5887 | return MOrErr; |
5888 | } |
5889 | |
5890 | Expected<std::unique_ptr<Module>> |
5891 | BitcodeModule::parseModule(LLVMContext &Context) { |
5892 | return getModuleImpl(Context, true, false, false); |
5893 | // TODO: Restore the use-lists to the in-memory state when the bitcode was |
5894 | // written. We must defer until the Module has been fully materialized. |
5895 | } |
5896 | |
5897 | Expected<std::unique_ptr<Module>> llvm::parseBitcodeFile(MemoryBufferRef Buffer, |
5898 | LLVMContext &Context) { |
5899 | Expected<BitcodeModule> BM = getSingleModule(Buffer); |
5900 | if (!BM) |
5901 | return BM.takeError(); |
5902 | |
5903 | return BM->parseModule(Context); |
5904 | } |
5905 | |
5906 | Expected<std::string> llvm::getBitcodeTargetTriple(MemoryBufferRef Buffer) { |
5907 | Expected<BitstreamCursor> StreamOrErr = initStream(Buffer); |
5908 | if (!StreamOrErr) |
5909 | return StreamOrErr.takeError(); |
5910 | |
5911 | return readTriple(*StreamOrErr); |
5912 | } |
5913 | |
5914 | Expected<bool> llvm::isBitcodeContainingObjCCategory(MemoryBufferRef Buffer) { |
5915 | Expected<BitstreamCursor> StreamOrErr = initStream(Buffer); |
5916 | if (!StreamOrErr) |
5917 | return StreamOrErr.takeError(); |
5918 | |
5919 | return hasObjCCategory(*StreamOrErr); |
5920 | } |
5921 | |
5922 | Expected<std::string> llvm::getBitcodeProducerString(MemoryBufferRef Buffer) { |
5923 | Expected<BitstreamCursor> StreamOrErr = initStream(Buffer); |
5924 | if (!StreamOrErr) |
5925 | return StreamOrErr.takeError(); |
5926 | |
5927 | return readIdentificationCode(*StreamOrErr); |
5928 | } |
5929 | |
5930 | Error llvm::readModuleSummaryIndex(MemoryBufferRef Buffer, |
5931 | ModuleSummaryIndex &CombinedIndex, |
5932 | uint64_t ModuleId) { |
5933 | Expected<BitcodeModule> BM = getSingleModule(Buffer); |
5934 | if (!BM) |
5935 | return BM.takeError(); |
5936 | |
5937 | return BM->readSummary(CombinedIndex, BM->getModuleIdentifier(), ModuleId); |
5938 | } |
5939 | |
5940 | Expected<std::unique_ptr<ModuleSummaryIndex>> |
5941 | llvm::getModuleSummaryIndex(MemoryBufferRef Buffer) { |
5942 | Expected<BitcodeModule> BM = getSingleModule(Buffer); |
5943 | if (!BM) |
5944 | return BM.takeError(); |
5945 | |
5946 | return BM->getSummary(); |
5947 | } |
5948 | |
5949 | Expected<BitcodeLTOInfo> llvm::getBitcodeLTOInfo(MemoryBufferRef Buffer) { |
5950 | Expected<BitcodeModule> BM = getSingleModule(Buffer); |
5951 | if (!BM) |
5952 | return BM.takeError(); |
5953 | |
5954 | return BM->getLTOInfo(); |
5955 | } |
5956 | |
5957 | Expected<std::unique_ptr<ModuleSummaryIndex>> |
5958 | llvm::getModuleSummaryIndexForFile(StringRef Path, |
5959 | bool IgnoreEmptyThinLTOIndexFile) { |
5960 | ErrorOr<std::unique_ptr<MemoryBuffer>> FileOrErr = |
5961 | MemoryBuffer::getFileOrSTDIN(Path); |
5962 | if (!FileOrErr) |
5963 | return errorCodeToError(FileOrErr.getError()); |
5964 | if (IgnoreEmptyThinLTOIndexFile && !(*FileOrErr)->getBufferSize()) |
5965 | return nullptr; |
5966 | return getModuleSummaryIndex(**FileOrErr); |
5967 | } |