Bug Summary

File:llvm/lib/Bitcode/Reader/BitcodeReader.cpp
Warning:line 3468, column 5
Value stored to 'OpNum' is never read

Annotated Source Code

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clang -cc1 -cc1 -triple x86_64-pc-linux-gnu -analyze -disable-free -disable-llvm-verifier -discard-value-names -main-file-name BitcodeReader.cpp -analyzer-store=region -analyzer-opt-analyze-nested-blocks -analyzer-checker=core -analyzer-checker=apiModeling -analyzer-checker=unix -analyzer-checker=deadcode -analyzer-checker=cplusplus -analyzer-checker=security.insecureAPI.UncheckedReturn -analyzer-checker=security.insecureAPI.getpw -analyzer-checker=security.insecureAPI.gets -analyzer-checker=security.insecureAPI.mktemp -analyzer-checker=security.insecureAPI.mkstemp -analyzer-checker=security.insecureAPI.vfork -analyzer-checker=nullability.NullPassedToNonnull -analyzer-checker=nullability.NullReturnedFromNonnull -analyzer-output plist -w -setup-static-analyzer -analyzer-config-compatibility-mode=true -mrelocation-model pic -pic-level 2 -fhalf-no-semantic-interposition -mframe-pointer=none -fmath-errno -fno-rounding-math -mconstructor-aliases -munwind-tables -target-cpu x86-64 -tune-cpu generic -fno-split-dwarf-inlining -debugger-tuning=gdb -ffunction-sections -fdata-sections -resource-dir /usr/lib/llvm-12/lib/clang/12.0.0 -D _DEBUG -D _GNU_SOURCE -D __STDC_CONSTANT_MACROS -D __STDC_FORMAT_MACROS -D __STDC_LIMIT_MACROS -I /build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/build-llvm/lib/Bitcode/Reader -I /build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/llvm/lib/Bitcode/Reader -I /build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/build-llvm/include -I /build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/llvm/include -U NDEBUG -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/c++/6.3.0 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/x86_64-linux-gnu/c++/6.3.0 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/x86_64-linux-gnu/c++/6.3.0 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/c++/6.3.0/backward -internal-isystem /usr/local/include -internal-isystem /usr/lib/llvm-12/lib/clang/12.0.0/include -internal-externc-isystem /usr/include/x86_64-linux-gnu -internal-externc-isystem /include -internal-externc-isystem /usr/include -O2 -Wno-unused-parameter -Wwrite-strings -Wno-missing-field-initializers -Wno-long-long -Wno-maybe-uninitialized -Wno-comment -std=c++14 -fdeprecated-macro -fdebug-compilation-dir /build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/build-llvm/lib/Bitcode/Reader -fdebug-prefix-map=/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1=. -ferror-limit 19 -fvisibility-inlines-hidden -stack-protector 2 -fgnuc-version=4.2.1 -vectorize-loops -vectorize-slp -analyzer-output=html -analyzer-config stable-report-filename=true -faddrsig -o /tmp/scan-build-2021-01-24-223304-31662-1 -x c++ /build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/llvm/lib/Bitcode/Reader/BitcodeReader.cpp
1//===- BitcodeReader.cpp - Internal BitcodeReader implementation ----------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8
9#include "llvm/Bitcode/BitcodeReader.h"
10#include "MetadataLoader.h"
11#include "ValueList.h"
12#include "llvm/ADT/APFloat.h"
13#include "llvm/ADT/APInt.h"
14#include "llvm/ADT/ArrayRef.h"
15#include "llvm/ADT/DenseMap.h"
16#include "llvm/ADT/Optional.h"
17#include "llvm/ADT/STLExtras.h"
18#include "llvm/ADT/SmallString.h"
19#include "llvm/ADT/SmallVector.h"
20#include "llvm/ADT/StringRef.h"
21#include "llvm/ADT/Triple.h"
22#include "llvm/ADT/Twine.h"
23#include "llvm/Bitcode/BitcodeCommon.h"
24#include "llvm/Bitcode/LLVMBitCodes.h"
25#include "llvm/Bitstream/BitstreamReader.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/CallingConv.h"
32#include "llvm/IR/Comdat.h"
33#include "llvm/IR/Constant.h"
34#include "llvm/IR/Constants.h"
35#include "llvm/IR/DataLayout.h"
36#include "llvm/IR/DebugInfo.h"
37#include "llvm/IR/DebugInfoMetadata.h"
38#include "llvm/IR/DebugLoc.h"
39#include "llvm/IR/DerivedTypes.h"
40#include "llvm/IR/Function.h"
41#include "llvm/IR/GVMaterializer.h"
42#include "llvm/IR/GlobalAlias.h"
43#include "llvm/IR/GlobalIFunc.h"
44#include "llvm/IR/GlobalIndirectSymbol.h"
45#include "llvm/IR/GlobalObject.h"
46#include "llvm/IR/GlobalValue.h"
47#include "llvm/IR/GlobalVariable.h"
48#include "llvm/IR/InlineAsm.h"
49#include "llvm/IR/InstIterator.h"
50#include "llvm/IR/InstrTypes.h"
51#include "llvm/IR/Instruction.h"
52#include "llvm/IR/Instructions.h"
53#include "llvm/IR/Intrinsics.h"
54#include "llvm/IR/LLVMContext.h"
55#include "llvm/IR/Metadata.h"
56#include "llvm/IR/Module.h"
57#include "llvm/IR/ModuleSummaryIndex.h"
58#include "llvm/IR/Operator.h"
59#include "llvm/IR/Type.h"
60#include "llvm/IR/Value.h"
61#include "llvm/IR/Verifier.h"
62#include "llvm/Support/AtomicOrdering.h"
63#include "llvm/Support/Casting.h"
64#include "llvm/Support/CommandLine.h"
65#include "llvm/Support/Compiler.h"
66#include "llvm/Support/Debug.h"
67#include "llvm/Support/Error.h"
68#include "llvm/Support/ErrorHandling.h"
69#include "llvm/Support/ErrorOr.h"
70#include "llvm/Support/ManagedStatic.h"
71#include "llvm/Support/MathExtras.h"
72#include "llvm/Support/MemoryBuffer.h"
73#include "llvm/Support/raw_ostream.h"
74#include <algorithm>
75#include <cassert>
76#include <cstddef>
77#include <cstdint>
78#include <deque>
79#include <map>
80#include <memory>
81#include <set>
82#include <string>
83#include <system_error>
84#include <tuple>
85#include <utility>
86#include <vector>
87
88using namespace llvm;
89
90static cl::opt<bool> PrintSummaryGUIDs(
91 "print-summary-global-ids", cl::init(false), cl::Hidden,
92 cl::desc(
93 "Print the global id for each value when reading the module summary"));
94
95namespace {
96
97enum {
98 SWITCH_INST_MAGIC = 0x4B5 // May 2012 => 1205 => Hex
99};
100
101} // end anonymous namespace
102
103static Error error(const Twine &Message) {
104 return make_error<StringError>(
105 Message, make_error_code(BitcodeError::CorruptedBitcode));
106}
107
108static Error hasInvalidBitcodeHeader(BitstreamCursor &Stream) {
109 if (!Stream.canSkipToPos(4))
110 return createStringError(std::errc::illegal_byte_sequence,
111 "file too small to contain bitcode header");
112 for (unsigned C : {'B', 'C'})
113 if (Expected<SimpleBitstreamCursor::word_t> Res = Stream.Read(8)) {
114 if (Res.get() != C)
115 return createStringError(std::errc::illegal_byte_sequence,
116 "file doesn't start with bitcode header");
117 } else
118 return Res.takeError();
119 for (unsigned C : {0x0, 0xC, 0xE, 0xD})
120 if (Expected<SimpleBitstreamCursor::word_t> Res = Stream.Read(4)) {
121 if (Res.get() != C)
122 return createStringError(std::errc::illegal_byte_sequence,
123 "file doesn't start with bitcode header");
124 } else
125 return Res.takeError();
126 return Error::success();
127}
128
129static Expected<BitstreamCursor> initStream(MemoryBufferRef Buffer) {
130 const unsigned char *BufPtr = (const unsigned char *)Buffer.getBufferStart();
131 const unsigned char *BufEnd = BufPtr + Buffer.getBufferSize();
132
133 if (Buffer.getBufferSize() & 3)
134 return error("Invalid bitcode signature");
135
136 // If we have a wrapper header, parse it and ignore the non-bc file contents.
137 // The magic number is 0x0B17C0DE stored in little endian.
138 if (isBitcodeWrapper(BufPtr, BufEnd))
139 if (SkipBitcodeWrapperHeader(BufPtr, BufEnd, true))
140 return error("Invalid bitcode wrapper header");
141
142 BitstreamCursor Stream(ArrayRef<uint8_t>(BufPtr, BufEnd));
143 if (Error Err = hasInvalidBitcodeHeader(Stream))
144 return std::move(Err);
145
146 return std::move(Stream);
147}
148
149/// Convert a string from a record into an std::string, return true on failure.
150template <typename StrTy>
151static bool convertToString(ArrayRef<uint64_t> Record, unsigned Idx,
152 StrTy &Result) {
153 if (Idx > Record.size())
154 return true;
155
156 Result.append(Record.begin() + Idx, Record.end());
157 return false;
158}
159
160// Strip all the TBAA attachment for the module.
161static void stripTBAA(Module *M) {
162 for (auto &F : *M) {
163 if (F.isMaterializable())
164 continue;
165 for (auto &I : instructions(F))
166 I.setMetadata(LLVMContext::MD_tbaa, nullptr);
167 }
168}
169
170/// Read the "IDENTIFICATION_BLOCK_ID" block, do some basic enforcement on the
171/// "epoch" encoded in the bitcode, and return the producer name if any.
172static Expected<std::string> readIdentificationBlock(BitstreamCursor &Stream) {
173 if (Error Err = Stream.EnterSubBlock(bitc::IDENTIFICATION_BLOCK_ID))
174 return std::move(Err);
175
176 // Read all the records.
177 SmallVector<uint64_t, 64> Record;
178
179 std::string ProducerIdentification;
180
181 while (true) {
182 BitstreamEntry Entry;
183 if (Expected<BitstreamEntry> Res = Stream.advance())
184 Entry = Res.get();
185 else
186 return Res.takeError();
187
188 switch (Entry.Kind) {
189 default:
190 case BitstreamEntry::Error:
191 return error("Malformed block");
192 case BitstreamEntry::EndBlock:
193 return ProducerIdentification;
194 case BitstreamEntry::Record:
195 // The interesting case.
196 break;
197 }
198
199 // Read a record.
200 Record.clear();
201 Expected<unsigned> MaybeBitCode = Stream.readRecord(Entry.ID, Record);
202 if (!MaybeBitCode)
203 return MaybeBitCode.takeError();
204 switch (MaybeBitCode.get()) {
205 default: // Default behavior: reject
206 return error("Invalid value");
207 case bitc::IDENTIFICATION_CODE_STRING: // IDENTIFICATION: [strchr x N]
208 convertToString(Record, 0, ProducerIdentification);
209 break;
210 case bitc::IDENTIFICATION_CODE_EPOCH: { // EPOCH: [epoch#]
211 unsigned epoch = (unsigned)Record[0];
212 if (epoch != bitc::BITCODE_CURRENT_EPOCH) {
213 return error(
214 Twine("Incompatible epoch: Bitcode '") + Twine(epoch) +
215 "' vs current: '" + Twine(bitc::BITCODE_CURRENT_EPOCH) + "'");
216 }
217 }
218 }
219 }
220}
221
222static Expected<std::string> readIdentificationCode(BitstreamCursor &Stream) {
223 // We expect a number of well-defined blocks, though we don't necessarily
224 // need to understand them all.
225 while (true) {
226 if (Stream.AtEndOfStream())
227 return "";
228
229 BitstreamEntry Entry;
230 if (Expected<BitstreamEntry> Res = Stream.advance())
231 Entry = std::move(Res.get());
232 else
233 return Res.takeError();
234
235 switch (Entry.Kind) {
236 case BitstreamEntry::EndBlock:
237 case BitstreamEntry::Error:
238 return error("Malformed block");
239
240 case BitstreamEntry::SubBlock:
241 if (Entry.ID == bitc::IDENTIFICATION_BLOCK_ID)
242 return readIdentificationBlock(Stream);
243
244 // Ignore other sub-blocks.
245 if (Error Err = Stream.SkipBlock())
246 return std::move(Err);
247 continue;
248 case BitstreamEntry::Record:
249 if (Expected<unsigned> Skipped = Stream.skipRecord(Entry.ID))
250 continue;
251 else
252 return Skipped.takeError();
253 }
254 }
255}
256
257static Expected<bool> hasObjCCategoryInModule(BitstreamCursor &Stream) {
258 if (Error Err = Stream.EnterSubBlock(bitc::MODULE_BLOCK_ID))
259 return std::move(Err);
260
261 SmallVector<uint64_t, 64> Record;
262 // Read all the records for this module.
263
264 while (true) {
265 Expected<BitstreamEntry> MaybeEntry = Stream.advanceSkippingSubblocks();
266 if (!MaybeEntry)
267 return MaybeEntry.takeError();
268 BitstreamEntry Entry = MaybeEntry.get();
269
270 switch (Entry.Kind) {
271 case BitstreamEntry::SubBlock: // Handled for us already.
272 case BitstreamEntry::Error:
273 return error("Malformed block");
274 case BitstreamEntry::EndBlock:
275 return false;
276 case BitstreamEntry::Record:
277 // The interesting case.
278 break;
279 }
280
281 // Read a record.
282 Expected<unsigned> MaybeRecord = Stream.readRecord(Entry.ID, Record);
283 if (!MaybeRecord)
284 return MaybeRecord.takeError();
285 switch (MaybeRecord.get()) {
286 default:
287 break; // Default behavior, ignore unknown content.
288 case bitc::MODULE_CODE_SECTIONNAME: { // SECTIONNAME: [strchr x N]
289 std::string S;
290 if (convertToString(Record, 0, S))
291 return error("Invalid record");
292 // Check for the i386 and other (x86_64, ARM) conventions
293 if (S.find("__DATA,__objc_catlist") != std::string::npos ||
294 S.find("__OBJC,__category") != std::string::npos)
295 return true;
296 break;
297 }
298 }
299 Record.clear();
300 }
301 llvm_unreachable("Exit infinite loop")::llvm::llvm_unreachable_internal("Exit infinite loop", "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 301)
;
302}
303
304static Expected<bool> hasObjCCategory(BitstreamCursor &Stream) {
305 // We expect a number of well-defined blocks, though we don't necessarily
306 // need to understand them all.
307 while (true) {
308 BitstreamEntry Entry;
309 if (Expected<BitstreamEntry> Res = Stream.advance())
310 Entry = std::move(Res.get());
311 else
312 return Res.takeError();
313
314 switch (Entry.Kind) {
315 case BitstreamEntry::Error:
316 return error("Malformed block");
317 case BitstreamEntry::EndBlock:
318 return false;
319
320 case BitstreamEntry::SubBlock:
321 if (Entry.ID == bitc::MODULE_BLOCK_ID)
322 return hasObjCCategoryInModule(Stream);
323
324 // Ignore other sub-blocks.
325 if (Error Err = Stream.SkipBlock())
326 return std::move(Err);
327 continue;
328
329 case BitstreamEntry::Record:
330 if (Expected<unsigned> Skipped = Stream.skipRecord(Entry.ID))
331 continue;
332 else
333 return Skipped.takeError();
334 }
335 }
336}
337
338static Expected<std::string> readModuleTriple(BitstreamCursor &Stream) {
339 if (Error Err = Stream.EnterSubBlock(bitc::MODULE_BLOCK_ID))
340 return std::move(Err);
341
342 SmallVector<uint64_t, 64> Record;
343
344 std::string Triple;
345
346 // Read all the records for this module.
347 while (true) {
348 Expected<BitstreamEntry> MaybeEntry = Stream.advanceSkippingSubblocks();
349 if (!MaybeEntry)
350 return MaybeEntry.takeError();
351 BitstreamEntry Entry = MaybeEntry.get();
352
353 switch (Entry.Kind) {
354 case BitstreamEntry::SubBlock: // Handled for us already.
355 case BitstreamEntry::Error:
356 return error("Malformed block");
357 case BitstreamEntry::EndBlock:
358 return Triple;
359 case BitstreamEntry::Record:
360 // The interesting case.
361 break;
362 }
363
364 // Read a record.
365 Expected<unsigned> MaybeRecord = Stream.readRecord(Entry.ID, Record);
366 if (!MaybeRecord)
367 return MaybeRecord.takeError();
368 switch (MaybeRecord.get()) {
369 default: break; // Default behavior, ignore unknown content.
370 case bitc::MODULE_CODE_TRIPLE: { // TRIPLE: [strchr x N]
371 std::string S;
372 if (convertToString(Record, 0, S))
373 return error("Invalid record");
374 Triple = S;
375 break;
376 }
377 }
378 Record.clear();
379 }
380 llvm_unreachable("Exit infinite loop")::llvm::llvm_unreachable_internal("Exit infinite loop", "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 380)
;
381}
382
383static Expected<std::string> readTriple(BitstreamCursor &Stream) {
384 // We expect a number of well-defined blocks, though we don't necessarily
385 // need to understand them all.
386 while (true) {
387 Expected<BitstreamEntry> MaybeEntry = Stream.advance();
388 if (!MaybeEntry)
389 return MaybeEntry.takeError();
390 BitstreamEntry Entry = MaybeEntry.get();
391
392 switch (Entry.Kind) {
393 case BitstreamEntry::Error:
394 return error("Malformed block");
395 case BitstreamEntry::EndBlock:
396 return "";
397
398 case BitstreamEntry::SubBlock:
399 if (Entry.ID == bitc::MODULE_BLOCK_ID)
400 return readModuleTriple(Stream);
401
402 // Ignore other sub-blocks.
403 if (Error Err = Stream.SkipBlock())
404 return std::move(Err);
405 continue;
406
407 case BitstreamEntry::Record:
408 if (llvm::Expected<unsigned> Skipped = Stream.skipRecord(Entry.ID))
409 continue;
410 else
411 return Skipped.takeError();
412 }
413 }
414}
415
416namespace {
417
418class BitcodeReaderBase {
419protected:
420 BitcodeReaderBase(BitstreamCursor Stream, StringRef Strtab)
421 : Stream(std::move(Stream)), Strtab(Strtab) {
422 this->Stream.setBlockInfo(&BlockInfo);
423 }
424
425 BitstreamBlockInfo BlockInfo;
426 BitstreamCursor Stream;
427 StringRef Strtab;
428
429 /// In version 2 of the bitcode we store names of global values and comdats in
430 /// a string table rather than in the VST.
431 bool UseStrtab = false;
432
433 Expected<unsigned> parseVersionRecord(ArrayRef<uint64_t> Record);
434
435 /// If this module uses a string table, pop the reference to the string table
436 /// and return the referenced string and the rest of the record. Otherwise
437 /// just return the record itself.
438 std::pair<StringRef, ArrayRef<uint64_t>>
439 readNameFromStrtab(ArrayRef<uint64_t> Record);
440
441 bool readBlockInfo();
442
443 // Contains an arbitrary and optional string identifying the bitcode producer
444 std::string ProducerIdentification;
445
446 Error error(const Twine &Message);
447};
448
449} // end anonymous namespace
450
451Error BitcodeReaderBase::error(const Twine &Message) {
452 std::string FullMsg = Message.str();
453 if (!ProducerIdentification.empty())
454 FullMsg += " (Producer: '" + ProducerIdentification + "' Reader: 'LLVM " +
455 LLVM_VERSION_STRING"12.0.0" "')";
456 return ::error(FullMsg);
457}
458
459Expected<unsigned>
460BitcodeReaderBase::parseVersionRecord(ArrayRef<uint64_t> Record) {
461 if (Record.empty())
462 return error("Invalid record");
463 unsigned ModuleVersion = Record[0];
464 if (ModuleVersion > 2)
465 return error("Invalid value");
466 UseStrtab = ModuleVersion >= 2;
467 return ModuleVersion;
468}
469
470std::pair<StringRef, ArrayRef<uint64_t>>
471BitcodeReaderBase::readNameFromStrtab(ArrayRef<uint64_t> Record) {
472 if (!UseStrtab)
473 return {"", Record};
474 // Invalid reference. Let the caller complain about the record being empty.
475 if (Record[0] + Record[1] > Strtab.size())
476 return {"", {}};
477 return {StringRef(Strtab.data() + Record[0], Record[1]), Record.slice(2)};
478}
479
480namespace {
481
482class BitcodeReader : public BitcodeReaderBase, public GVMaterializer {
483 LLVMContext &Context;
484 Module *TheModule = nullptr;
485 // Next offset to start scanning for lazy parsing of function bodies.
486 uint64_t NextUnreadBit = 0;
487 // Last function offset found in the VST.
488 uint64_t LastFunctionBlockBit = 0;
489 bool SeenValueSymbolTable = false;
490 uint64_t VSTOffset = 0;
491
492 std::vector<std::string> SectionTable;
493 std::vector<std::string> GCTable;
494
495 std::vector<Type*> TypeList;
496 DenseMap<Function *, FunctionType *> FunctionTypes;
497 BitcodeReaderValueList ValueList;
498 Optional<MetadataLoader> MDLoader;
499 std::vector<Comdat *> ComdatList;
500 SmallVector<Instruction *, 64> InstructionList;
501
502 std::vector<std::pair<GlobalVariable *, unsigned>> GlobalInits;
503 std::vector<std::pair<GlobalIndirectSymbol *, unsigned>> IndirectSymbolInits;
504 std::vector<std::pair<Function *, unsigned>> FunctionPrefixes;
505 std::vector<std::pair<Function *, unsigned>> FunctionPrologues;
506 std::vector<std::pair<Function *, unsigned>> FunctionPersonalityFns;
507
508 /// The set of attributes by index. Index zero in the file is for null, and
509 /// is thus not represented here. As such all indices are off by one.
510 std::vector<AttributeList> MAttributes;
511
512 /// The set of attribute groups.
513 std::map<unsigned, AttributeList> MAttributeGroups;
514
515 /// While parsing a function body, this is a list of the basic blocks for the
516 /// function.
517 std::vector<BasicBlock*> FunctionBBs;
518
519 // When reading the module header, this list is populated with functions that
520 // have bodies later in the file.
521 std::vector<Function*> FunctionsWithBodies;
522
523 // When intrinsic functions are encountered which require upgrading they are
524 // stored here with their replacement function.
525 using UpdatedIntrinsicMap = DenseMap<Function *, Function *>;
526 UpdatedIntrinsicMap UpgradedIntrinsics;
527 // Intrinsics which were remangled because of types rename
528 UpdatedIntrinsicMap RemangledIntrinsics;
529
530 // Several operations happen after the module header has been read, but
531 // before function bodies are processed. This keeps track of whether
532 // we've done this yet.
533 bool SeenFirstFunctionBody = false;
534
535 /// When function bodies are initially scanned, this map contains info about
536 /// where to find deferred function body in the stream.
537 DenseMap<Function*, uint64_t> DeferredFunctionInfo;
538
539 /// When Metadata block is initially scanned when parsing the module, we may
540 /// choose to defer parsing of the metadata. This vector contains info about
541 /// which Metadata blocks are deferred.
542 std::vector<uint64_t> DeferredMetadataInfo;
543
544 /// These are basic blocks forward-referenced by block addresses. They are
545 /// inserted lazily into functions when they're loaded. The basic block ID is
546 /// its index into the vector.
547 DenseMap<Function *, std::vector<BasicBlock *>> BasicBlockFwdRefs;
548 std::deque<Function *> BasicBlockFwdRefQueue;
549
550 /// Indicates that we are using a new encoding for instruction operands where
551 /// most operands in the current FUNCTION_BLOCK are encoded relative to the
552 /// instruction number, for a more compact encoding. Some instruction
553 /// operands are not relative to the instruction ID: basic block numbers, and
554 /// types. Once the old style function blocks have been phased out, we would
555 /// not need this flag.
556 bool UseRelativeIDs = false;
557
558 /// True if all functions will be materialized, negating the need to process
559 /// (e.g.) blockaddress forward references.
560 bool WillMaterializeAllForwardRefs = false;
561
562 bool StripDebugInfo = false;
563 TBAAVerifier TBAAVerifyHelper;
564
565 std::vector<std::string> BundleTags;
566 SmallVector<SyncScope::ID, 8> SSIDs;
567
568public:
569 BitcodeReader(BitstreamCursor Stream, StringRef Strtab,
570 StringRef ProducerIdentification, LLVMContext &Context);
571
572 Error materializeForwardReferencedFunctions();
573
574 Error materialize(GlobalValue *GV) override;
575 Error materializeModule() override;
576 std::vector<StructType *> getIdentifiedStructTypes() const override;
577
578 /// Main interface to parsing a bitcode buffer.
579 /// \returns true if an error occurred.
580 Error parseBitcodeInto(
581 Module *M, bool ShouldLazyLoadMetadata = false, bool IsImporting = false,
582 DataLayoutCallbackTy DataLayoutCallback = [](StringRef) { return None; });
583
584 static uint64_t decodeSignRotatedValue(uint64_t V);
585
586 /// Materialize any deferred Metadata block.
587 Error materializeMetadata() override;
588
589 void setStripDebugInfo() override;
590
591private:
592 std::vector<StructType *> IdentifiedStructTypes;
593 StructType *createIdentifiedStructType(LLVMContext &Context, StringRef Name);
594 StructType *createIdentifiedStructType(LLVMContext &Context);
595
596 /// Map all pointer types within \param Ty to the opaque pointer
597 /// type in the same address space if opaque pointers are being
598 /// used, otherwise nop. This converts a bitcode-reader internal
599 /// type into one suitable for use in a Value.
600 Type *flattenPointerTypes(Type *Ty) {
601 return Ty;
602 }
603
604 /// Given a fully structured pointer type (i.e. not opaque), return
605 /// the flattened form of its element, suitable for use in a Value.
606 Type *getPointerElementFlatType(Type *Ty) {
607 return flattenPointerTypes(cast<PointerType>(Ty)->getElementType());
608 }
609
610 /// Given a fully structured pointer type, get its element type in
611 /// both fully structured form, and flattened form suitable for use
612 /// in a Value.
613 std::pair<Type *, Type *> getPointerElementTypes(Type *FullTy) {
614 Type *ElTy = cast<PointerType>(FullTy)->getElementType();
615 return std::make_pair(ElTy, flattenPointerTypes(ElTy));
616 }
617
618 /// Return the flattened type (suitable for use in a Value)
619 /// specified by the given \param ID .
620 Type *getTypeByID(unsigned ID) {
621 return flattenPointerTypes(getFullyStructuredTypeByID(ID));
622 }
623
624 /// Return the fully structured (bitcode-reader internal) type
625 /// corresponding to the given \param ID .
626 Type *getFullyStructuredTypeByID(unsigned ID);
627
628 Value *getFnValueByID(unsigned ID, Type *Ty, Type **FullTy = nullptr) {
629 if (Ty && Ty->isMetadataTy())
630 return MetadataAsValue::get(Ty->getContext(), getFnMetadataByID(ID));
631 return ValueList.getValueFwdRef(ID, Ty, FullTy);
632 }
633
634 Metadata *getFnMetadataByID(unsigned ID) {
635 return MDLoader->getMetadataFwdRefOrLoad(ID);
636 }
637
638 BasicBlock *getBasicBlock(unsigned ID) const {
639 if (ID >= FunctionBBs.size()) return nullptr; // Invalid ID
640 return FunctionBBs[ID];
641 }
642
643 AttributeList getAttributes(unsigned i) const {
644 if (i-1 < MAttributes.size())
645 return MAttributes[i-1];
646 return AttributeList();
647 }
648
649 /// Read a value/type pair out of the specified record from slot 'Slot'.
650 /// Increment Slot past the number of slots used in the record. Return true on
651 /// failure.
652 bool getValueTypePair(const SmallVectorImpl<uint64_t> &Record, unsigned &Slot,
653 unsigned InstNum, Value *&ResVal,
654 Type **FullTy = nullptr) {
655 if (Slot == Record.size()) return true;
656 unsigned ValNo = (unsigned)Record[Slot++];
657 // Adjust the ValNo, if it was encoded relative to the InstNum.
658 if (UseRelativeIDs)
659 ValNo = InstNum - ValNo;
660 if (ValNo < InstNum) {
661 // If this is not a forward reference, just return the value we already
662 // have.
663 ResVal = getFnValueByID(ValNo, nullptr, FullTy);
664 return ResVal == nullptr;
665 }
666 if (Slot == Record.size())
667 return true;
668
669 unsigned TypeNo = (unsigned)Record[Slot++];
670 ResVal = getFnValueByID(ValNo, getTypeByID(TypeNo));
671 if (FullTy)
672 *FullTy = getFullyStructuredTypeByID(TypeNo);
673 return ResVal == nullptr;
674 }
675
676 /// Read a value out of the specified record from slot 'Slot'. Increment Slot
677 /// past the number of slots used by the value in the record. Return true if
678 /// there is an error.
679 bool popValue(const SmallVectorImpl<uint64_t> &Record, unsigned &Slot,
680 unsigned InstNum, Type *Ty, Value *&ResVal) {
681 if (getValue(Record, Slot, InstNum, Ty, ResVal))
682 return true;
683 // All values currently take a single record slot.
684 ++Slot;
685 return false;
686 }
687
688 /// Like popValue, but does not increment the Slot number.
689 bool getValue(const SmallVectorImpl<uint64_t> &Record, unsigned Slot,
690 unsigned InstNum, Type *Ty, Value *&ResVal) {
691 ResVal = getValue(Record, Slot, InstNum, Ty);
692 return ResVal == nullptr;
693 }
694
695 /// Version of getValue that returns ResVal directly, or 0 if there is an
696 /// error.
697 Value *getValue(const SmallVectorImpl<uint64_t> &Record, unsigned Slot,
698 unsigned InstNum, Type *Ty) {
699 if (Slot == Record.size()) return nullptr;
700 unsigned ValNo = (unsigned)Record[Slot];
701 // Adjust the ValNo, if it was encoded relative to the InstNum.
702 if (UseRelativeIDs)
703 ValNo = InstNum - ValNo;
704 return getFnValueByID(ValNo, Ty);
705 }
706
707 /// Like getValue, but decodes signed VBRs.
708 Value *getValueSigned(const SmallVectorImpl<uint64_t> &Record, unsigned Slot,
709 unsigned InstNum, Type *Ty) {
710 if (Slot == Record.size()) return nullptr;
711 unsigned ValNo = (unsigned)decodeSignRotatedValue(Record[Slot]);
712 // Adjust the ValNo, if it was encoded relative to the InstNum.
713 if (UseRelativeIDs)
714 ValNo = InstNum - ValNo;
715 return getFnValueByID(ValNo, Ty);
716 }
717
718 /// Upgrades old-style typeless byval or sret attributes by adding the
719 /// corresponding argument's pointee type.
720 void propagateByValSRetTypes(CallBase *CB, ArrayRef<Type *> ArgsFullTys);
721
722 /// Converts alignment exponent (i.e. power of two (or zero)) to the
723 /// corresponding alignment to use. If alignment is too large, returns
724 /// a corresponding error code.
725 Error parseAlignmentValue(uint64_t Exponent, MaybeAlign &Alignment);
726 Error parseAttrKind(uint64_t Code, Attribute::AttrKind *Kind);
727 Error parseModule(
728 uint64_t ResumeBit, bool ShouldLazyLoadMetadata = false,
729 DataLayoutCallbackTy DataLayoutCallback = [](StringRef) { return None; });
730
731 Error parseComdatRecord(ArrayRef<uint64_t> Record);
732 Error parseGlobalVarRecord(ArrayRef<uint64_t> Record);
733 Error parseFunctionRecord(ArrayRef<uint64_t> Record);
734 Error parseGlobalIndirectSymbolRecord(unsigned BitCode,
735 ArrayRef<uint64_t> Record);
736
737 Error parseAttributeBlock();
738 Error parseAttributeGroupBlock();
739 Error parseTypeTable();
740 Error parseTypeTableBody();
741 Error parseOperandBundleTags();
742 Error parseSyncScopeNames();
743
744 Expected<Value *> recordValue(SmallVectorImpl<uint64_t> &Record,
745 unsigned NameIndex, Triple &TT);
746 void setDeferredFunctionInfo(unsigned FuncBitcodeOffsetDelta, Function *F,
747 ArrayRef<uint64_t> Record);
748 Error parseValueSymbolTable(uint64_t Offset = 0);
749 Error parseGlobalValueSymbolTable();
750 Error parseConstants();
751 Error rememberAndSkipFunctionBodies();
752 Error rememberAndSkipFunctionBody();
753 /// Save the positions of the Metadata blocks and skip parsing the blocks.
754 Error rememberAndSkipMetadata();
755 Error typeCheckLoadStoreInst(Type *ValType, Type *PtrType);
756 Error parseFunctionBody(Function *F);
757 Error globalCleanup();
758 Error resolveGlobalAndIndirectSymbolInits();
759 Error parseUseLists();
760 Error findFunctionInStream(
761 Function *F,
762 DenseMap<Function *, uint64_t>::iterator DeferredFunctionInfoIterator);
763
764 SyncScope::ID getDecodedSyncScopeID(unsigned Val);
765};
766
767/// Class to manage reading and parsing function summary index bitcode
768/// files/sections.
769class ModuleSummaryIndexBitcodeReader : public BitcodeReaderBase {
770 /// The module index built during parsing.
771 ModuleSummaryIndex &TheIndex;
772
773 /// Indicates whether we have encountered a global value summary section
774 /// yet during parsing.
775 bool SeenGlobalValSummary = false;
776
777 /// Indicates whether we have already parsed the VST, used for error checking.
778 bool SeenValueSymbolTable = false;
779
780 /// Set to the offset of the VST recorded in the MODULE_CODE_VSTOFFSET record.
781 /// Used to enable on-demand parsing of the VST.
782 uint64_t VSTOffset = 0;
783
784 // Map to save ValueId to ValueInfo association that was recorded in the
785 // ValueSymbolTable. It is used after the VST is parsed to convert
786 // call graph edges read from the function summary from referencing
787 // callees by their ValueId to using the ValueInfo instead, which is how
788 // they are recorded in the summary index being built.
789 // We save a GUID which refers to the same global as the ValueInfo, but
790 // ignoring the linkage, i.e. for values other than local linkage they are
791 // identical.
792 DenseMap<unsigned, std::pair<ValueInfo, GlobalValue::GUID>>
793 ValueIdToValueInfoMap;
794
795 /// Map populated during module path string table parsing, from the
796 /// module ID to a string reference owned by the index's module
797 /// path string table, used to correlate with combined index
798 /// summary records.
799 DenseMap<uint64_t, StringRef> ModuleIdMap;
800
801 /// Original source file name recorded in a bitcode record.
802 std::string SourceFileName;
803
804 /// The string identifier given to this module by the client, normally the
805 /// path to the bitcode file.
806 StringRef ModulePath;
807
808 /// For per-module summary indexes, the unique numerical identifier given to
809 /// this module by the client.
810 unsigned ModuleId;
811
812public:
813 ModuleSummaryIndexBitcodeReader(BitstreamCursor Stream, StringRef Strtab,
814 ModuleSummaryIndex &TheIndex,
815 StringRef ModulePath, unsigned ModuleId);
816
817 Error parseModule();
818
819private:
820 void setValueGUID(uint64_t ValueID, StringRef ValueName,
821 GlobalValue::LinkageTypes Linkage,
822 StringRef SourceFileName);
823 Error parseValueSymbolTable(
824 uint64_t Offset,
825 DenseMap<unsigned, GlobalValue::LinkageTypes> &ValueIdToLinkageMap);
826 std::vector<ValueInfo> makeRefList(ArrayRef<uint64_t> Record);
827 std::vector<FunctionSummary::EdgeTy> makeCallList(ArrayRef<uint64_t> Record,
828 bool IsOldProfileFormat,
829 bool HasProfile,
830 bool HasRelBF);
831 Error parseEntireSummary(unsigned ID);
832 Error parseModuleStringTable();
833 void parseTypeIdCompatibleVtableSummaryRecord(ArrayRef<uint64_t> Record);
834 void parseTypeIdCompatibleVtableInfo(ArrayRef<uint64_t> Record, size_t &Slot,
835 TypeIdCompatibleVtableInfo &TypeId);
836 std::vector<FunctionSummary::ParamAccess>
837 parseParamAccesses(ArrayRef<uint64_t> Record);
838
839 std::pair<ValueInfo, GlobalValue::GUID>
840 getValueInfoFromValueId(unsigned ValueId);
841
842 void addThisModule();
843 ModuleSummaryIndex::ModuleInfo *getThisModule();
844};
845
846} // end anonymous namespace
847
848std::error_code llvm::errorToErrorCodeAndEmitErrors(LLVMContext &Ctx,
849 Error Err) {
850 if (Err) {
851 std::error_code EC;
852 handleAllErrors(std::move(Err), [&](ErrorInfoBase &EIB) {
853 EC = EIB.convertToErrorCode();
854 Ctx.emitError(EIB.message());
855 });
856 return EC;
857 }
858 return std::error_code();
859}
860
861BitcodeReader::BitcodeReader(BitstreamCursor Stream, StringRef Strtab,
862 StringRef ProducerIdentification,
863 LLVMContext &Context)
864 : BitcodeReaderBase(std::move(Stream), Strtab), Context(Context),
865 ValueList(Context, Stream.SizeInBytes()) {
866 this->ProducerIdentification = std::string(ProducerIdentification);
867}
868
869Error BitcodeReader::materializeForwardReferencedFunctions() {
870 if (WillMaterializeAllForwardRefs)
871 return Error::success();
872
873 // Prevent recursion.
874 WillMaterializeAllForwardRefs = true;
875
876 while (!BasicBlockFwdRefQueue.empty()) {
877 Function *F = BasicBlockFwdRefQueue.front();
878 BasicBlockFwdRefQueue.pop_front();
879 assert(F && "Expected valid function")((F && "Expected valid function") ? static_cast<void
> (0) : __assert_fail ("F && \"Expected valid function\""
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 879, __PRETTY_FUNCTION__))
;
880 if (!BasicBlockFwdRefs.count(F))
881 // Already materialized.
882 continue;
883
884 // Check for a function that isn't materializable to prevent an infinite
885 // loop. When parsing a blockaddress stored in a global variable, there
886 // isn't a trivial way to check if a function will have a body without a
887 // linear search through FunctionsWithBodies, so just check it here.
888 if (!F->isMaterializable())
889 return error("Never resolved function from blockaddress");
890
891 // Try to materialize F.
892 if (Error Err = materialize(F))
893 return Err;
894 }
895 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-12~++20210124100612+2afaf072f5c1/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 895, __PRETTY_FUNCTION__))
;
896
897 // Reset state.
898 WillMaterializeAllForwardRefs = false;
899 return Error::success();
900}
901
902//===----------------------------------------------------------------------===//
903// Helper functions to implement forward reference resolution, etc.
904//===----------------------------------------------------------------------===//
905
906static bool hasImplicitComdat(size_t Val) {
907 switch (Val) {
908 default:
909 return false;
910 case 1: // Old WeakAnyLinkage
911 case 4: // Old LinkOnceAnyLinkage
912 case 10: // Old WeakODRLinkage
913 case 11: // Old LinkOnceODRLinkage
914 return true;
915 }
916}
917
918static GlobalValue::LinkageTypes getDecodedLinkage(unsigned Val) {
919 switch (Val) {
920 default: // Map unknown/new linkages to external
921 case 0:
922 return GlobalValue::ExternalLinkage;
923 case 2:
924 return GlobalValue::AppendingLinkage;
925 case 3:
926 return GlobalValue::InternalLinkage;
927 case 5:
928 return GlobalValue::ExternalLinkage; // Obsolete DLLImportLinkage
929 case 6:
930 return GlobalValue::ExternalLinkage; // Obsolete DLLExportLinkage
931 case 7:
932 return GlobalValue::ExternalWeakLinkage;
933 case 8:
934 return GlobalValue::CommonLinkage;
935 case 9:
936 return GlobalValue::PrivateLinkage;
937 case 12:
938 return GlobalValue::AvailableExternallyLinkage;
939 case 13:
940 return GlobalValue::PrivateLinkage; // Obsolete LinkerPrivateLinkage
941 case 14:
942 return GlobalValue::PrivateLinkage; // Obsolete LinkerPrivateWeakLinkage
943 case 15:
944 return GlobalValue::ExternalLinkage; // Obsolete LinkOnceODRAutoHideLinkage
945 case 1: // Old value with implicit comdat.
946 case 16:
947 return GlobalValue::WeakAnyLinkage;
948 case 10: // Old value with implicit comdat.
949 case 17:
950 return GlobalValue::WeakODRLinkage;
951 case 4: // Old value with implicit comdat.
952 case 18:
953 return GlobalValue::LinkOnceAnyLinkage;
954 case 11: // Old value with implicit comdat.
955 case 19:
956 return GlobalValue::LinkOnceODRLinkage;
957 }
958}
959
960static FunctionSummary::FFlags getDecodedFFlags(uint64_t RawFlags) {
961 FunctionSummary::FFlags Flags;
962 Flags.ReadNone = RawFlags & 0x1;
963 Flags.ReadOnly = (RawFlags >> 1) & 0x1;
964 Flags.NoRecurse = (RawFlags >> 2) & 0x1;
965 Flags.ReturnDoesNotAlias = (RawFlags >> 3) & 0x1;
966 Flags.NoInline = (RawFlags >> 4) & 0x1;
967 Flags.AlwaysInline = (RawFlags >> 5) & 0x1;
968 return Flags;
969}
970
971/// Decode the flags for GlobalValue in the summary.
972static GlobalValueSummary::GVFlags getDecodedGVSummaryFlags(uint64_t RawFlags,
973 uint64_t Version) {
974 // Summary were not emitted before LLVM 3.9, we don't need to upgrade Linkage
975 // like getDecodedLinkage() above. Any future change to the linkage enum and
976 // to getDecodedLinkage() will need to be taken into account here as above.
977 auto Linkage = GlobalValue::LinkageTypes(RawFlags & 0xF); // 4 bits
978 RawFlags = RawFlags >> 4;
979 bool NotEligibleToImport = (RawFlags & 0x1) || Version < 3;
980 // The Live flag wasn't introduced until version 3. For dead stripping
981 // to work correctly on earlier versions, we must conservatively treat all
982 // values as live.
983 bool Live = (RawFlags & 0x2) || Version < 3;
984 bool Local = (RawFlags & 0x4);
985 bool AutoHide = (RawFlags & 0x8);
986
987 return GlobalValueSummary::GVFlags(Linkage, NotEligibleToImport, Live, Local, AutoHide);
988}
989
990// Decode the flags for GlobalVariable in the summary
991static GlobalVarSummary::GVarFlags getDecodedGVarFlags(uint64_t RawFlags) {
992 return GlobalVarSummary::GVarFlags(
993 (RawFlags & 0x1) ? true : false, (RawFlags & 0x2) ? true : false,
994 (RawFlags & 0x4) ? true : false,
995 (GlobalObject::VCallVisibility)(RawFlags >> 3));
996}
997
998static GlobalValue::VisibilityTypes getDecodedVisibility(unsigned Val) {
999 switch (Val) {
1000 default: // Map unknown visibilities to default.
1001 case 0: return GlobalValue::DefaultVisibility;
1002 case 1: return GlobalValue::HiddenVisibility;
1003 case 2: return GlobalValue::ProtectedVisibility;
1004 }
1005}
1006
1007static GlobalValue::DLLStorageClassTypes
1008getDecodedDLLStorageClass(unsigned Val) {
1009 switch (Val) {
1010 default: // Map unknown values to default.
1011 case 0: return GlobalValue::DefaultStorageClass;
1012 case 1: return GlobalValue::DLLImportStorageClass;
1013 case 2: return GlobalValue::DLLExportStorageClass;
1014 }
1015}
1016
1017static bool getDecodedDSOLocal(unsigned Val) {
1018 switch(Val) {
1019 default: // Map unknown values to preemptable.
1020 case 0: return false;
1021 case 1: return true;
1022 }
1023}
1024
1025static GlobalVariable::ThreadLocalMode getDecodedThreadLocalMode(unsigned Val) {
1026 switch (Val) {
1027 case 0: return GlobalVariable::NotThreadLocal;
1028 default: // Map unknown non-zero value to general dynamic.
1029 case 1: return GlobalVariable::GeneralDynamicTLSModel;
1030 case 2: return GlobalVariable::LocalDynamicTLSModel;
1031 case 3: return GlobalVariable::InitialExecTLSModel;
1032 case 4: return GlobalVariable::LocalExecTLSModel;
1033 }
1034}
1035
1036static GlobalVariable::UnnamedAddr getDecodedUnnamedAddrType(unsigned Val) {
1037 switch (Val) {
1038 default: // Map unknown to UnnamedAddr::None.
1039 case 0: return GlobalVariable::UnnamedAddr::None;
1040 case 1: return GlobalVariable::UnnamedAddr::Global;
1041 case 2: return GlobalVariable::UnnamedAddr::Local;
1042 }
1043}
1044
1045static int getDecodedCastOpcode(unsigned Val) {
1046 switch (Val) {
1047 default: return -1;
1048 case bitc::CAST_TRUNC : return Instruction::Trunc;
1049 case bitc::CAST_ZEXT : return Instruction::ZExt;
1050 case bitc::CAST_SEXT : return Instruction::SExt;
1051 case bitc::CAST_FPTOUI : return Instruction::FPToUI;
1052 case bitc::CAST_FPTOSI : return Instruction::FPToSI;
1053 case bitc::CAST_UITOFP : return Instruction::UIToFP;
1054 case bitc::CAST_SITOFP : return Instruction::SIToFP;
1055 case bitc::CAST_FPTRUNC : return Instruction::FPTrunc;
1056 case bitc::CAST_FPEXT : return Instruction::FPExt;
1057 case bitc::CAST_PTRTOINT: return Instruction::PtrToInt;
1058 case bitc::CAST_INTTOPTR: return Instruction::IntToPtr;
1059 case bitc::CAST_BITCAST : return Instruction::BitCast;
1060 case bitc::CAST_ADDRSPACECAST: return Instruction::AddrSpaceCast;
1061 }
1062}
1063
1064static int getDecodedUnaryOpcode(unsigned Val, Type *Ty) {
1065 bool IsFP = Ty->isFPOrFPVectorTy();
1066 // UnOps are only valid for int/fp or vector of int/fp types
1067 if (!IsFP && !Ty->isIntOrIntVectorTy())
1068 return -1;
1069
1070 switch (Val) {
1071 default:
1072 return -1;
1073 case bitc::UNOP_FNEG:
1074 return IsFP ? Instruction::FNeg : -1;
1075 }
1076}
1077
1078static int getDecodedBinaryOpcode(unsigned Val, Type *Ty) {
1079 bool IsFP = Ty->isFPOrFPVectorTy();
1080 // BinOps are only valid for int/fp or vector of int/fp types
1081 if (!IsFP && !Ty->isIntOrIntVectorTy())
1082 return -1;
1083
1084 switch (Val) {
1085 default:
1086 return -1;
1087 case bitc::BINOP_ADD:
1088 return IsFP ? Instruction::FAdd : Instruction::Add;
1089 case bitc::BINOP_SUB:
1090 return IsFP ? Instruction::FSub : Instruction::Sub;
1091 case bitc::BINOP_MUL:
1092 return IsFP ? Instruction::FMul : Instruction::Mul;
1093 case bitc::BINOP_UDIV:
1094 return IsFP ? -1 : Instruction::UDiv;
1095 case bitc::BINOP_SDIV:
1096 return IsFP ? Instruction::FDiv : Instruction::SDiv;
1097 case bitc::BINOP_UREM:
1098 return IsFP ? -1 : Instruction::URem;
1099 case bitc::BINOP_SREM:
1100 return IsFP ? Instruction::FRem : Instruction::SRem;
1101 case bitc::BINOP_SHL:
1102 return IsFP ? -1 : Instruction::Shl;
1103 case bitc::BINOP_LSHR:
1104 return IsFP ? -1 : Instruction::LShr;
1105 case bitc::BINOP_ASHR:
1106 return IsFP ? -1 : Instruction::AShr;
1107 case bitc::BINOP_AND:
1108 return IsFP ? -1 : Instruction::And;
1109 case bitc::BINOP_OR:
1110 return IsFP ? -1 : Instruction::Or;
1111 case bitc::BINOP_XOR:
1112 return IsFP ? -1 : Instruction::Xor;
1113 }
1114}
1115
1116static AtomicRMWInst::BinOp getDecodedRMWOperation(unsigned Val) {
1117 switch (Val) {
1118 default: return AtomicRMWInst::BAD_BINOP;
1119 case bitc::RMW_XCHG: return AtomicRMWInst::Xchg;
1120 case bitc::RMW_ADD: return AtomicRMWInst::Add;
1121 case bitc::RMW_SUB: return AtomicRMWInst::Sub;
1122 case bitc::RMW_AND: return AtomicRMWInst::And;
1123 case bitc::RMW_NAND: return AtomicRMWInst::Nand;
1124 case bitc::RMW_OR: return AtomicRMWInst::Or;
1125 case bitc::RMW_XOR: return AtomicRMWInst::Xor;
1126 case bitc::RMW_MAX: return AtomicRMWInst::Max;
1127 case bitc::RMW_MIN: return AtomicRMWInst::Min;
1128 case bitc::RMW_UMAX: return AtomicRMWInst::UMax;
1129 case bitc::RMW_UMIN: return AtomicRMWInst::UMin;
1130 case bitc::RMW_FADD: return AtomicRMWInst::FAdd;
1131 case bitc::RMW_FSUB: return AtomicRMWInst::FSub;
1132 }
1133}
1134
1135static AtomicOrdering getDecodedOrdering(unsigned Val) {
1136 switch (Val) {
1137 case bitc::ORDERING_NOTATOMIC: return AtomicOrdering::NotAtomic;
1138 case bitc::ORDERING_UNORDERED: return AtomicOrdering::Unordered;
1139 case bitc::ORDERING_MONOTONIC: return AtomicOrdering::Monotonic;
1140 case bitc::ORDERING_ACQUIRE: return AtomicOrdering::Acquire;
1141 case bitc::ORDERING_RELEASE: return AtomicOrdering::Release;
1142 case bitc::ORDERING_ACQREL: return AtomicOrdering::AcquireRelease;
1143 default: // Map unknown orderings to sequentially-consistent.
1144 case bitc::ORDERING_SEQCST: return AtomicOrdering::SequentiallyConsistent;
1145 }
1146}
1147
1148static Comdat::SelectionKind getDecodedComdatSelectionKind(unsigned Val) {
1149 switch (Val) {
1150 default: // Map unknown selection kinds to any.
1151 case bitc::COMDAT_SELECTION_KIND_ANY:
1152 return Comdat::Any;
1153 case bitc::COMDAT_SELECTION_KIND_EXACT_MATCH:
1154 return Comdat::ExactMatch;
1155 case bitc::COMDAT_SELECTION_KIND_LARGEST:
1156 return Comdat::Largest;
1157 case bitc::COMDAT_SELECTION_KIND_NO_DUPLICATES:
1158 return Comdat::NoDuplicates;
1159 case bitc::COMDAT_SELECTION_KIND_SAME_SIZE:
1160 return Comdat::SameSize;
1161 }
1162}
1163
1164static FastMathFlags getDecodedFastMathFlags(unsigned Val) {
1165 FastMathFlags FMF;
1166 if (0 != (Val & bitc::UnsafeAlgebra))
1167 FMF.setFast();
1168 if (0 != (Val & bitc::AllowReassoc))
1169 FMF.setAllowReassoc();
1170 if (0 != (Val & bitc::NoNaNs))
1171 FMF.setNoNaNs();
1172 if (0 != (Val & bitc::NoInfs))
1173 FMF.setNoInfs();
1174 if (0 != (Val & bitc::NoSignedZeros))
1175 FMF.setNoSignedZeros();
1176 if (0 != (Val & bitc::AllowReciprocal))
1177 FMF.setAllowReciprocal();
1178 if (0 != (Val & bitc::AllowContract))
1179 FMF.setAllowContract(true);
1180 if (0 != (Val & bitc::ApproxFunc))
1181 FMF.setApproxFunc();
1182 return FMF;
1183}
1184
1185static void upgradeDLLImportExportLinkage(GlobalValue *GV, unsigned Val) {
1186 switch (Val) {
1187 case 5: GV->setDLLStorageClass(GlobalValue::DLLImportStorageClass); break;
1188 case 6: GV->setDLLStorageClass(GlobalValue::DLLExportStorageClass); break;
1189 }
1190}
1191
1192Type *BitcodeReader::getFullyStructuredTypeByID(unsigned ID) {
1193 // The type table size is always specified correctly.
1194 if (ID >= TypeList.size())
1195 return nullptr;
1196
1197 if (Type *Ty = TypeList[ID])
1198 return Ty;
1199
1200 // If we have a forward reference, the only possible case is when it is to a
1201 // named struct. Just create a placeholder for now.
1202 return TypeList[ID] = createIdentifiedStructType(Context);
1203}
1204
1205StructType *BitcodeReader::createIdentifiedStructType(LLVMContext &Context,
1206 StringRef Name) {
1207 auto *Ret = StructType::create(Context, Name);
1208 IdentifiedStructTypes.push_back(Ret);
1209 return Ret;
1210}
1211
1212StructType *BitcodeReader::createIdentifiedStructType(LLVMContext &Context) {
1213 auto *Ret = StructType::create(Context);
1214 IdentifiedStructTypes.push_back(Ret);
1215 return Ret;
1216}
1217
1218//===----------------------------------------------------------------------===//
1219// Functions for parsing blocks from the bitcode file
1220//===----------------------------------------------------------------------===//
1221
1222static uint64_t getRawAttributeMask(Attribute::AttrKind Val) {
1223 switch (Val) {
1224 case Attribute::EndAttrKinds:
1225 case Attribute::EmptyKey:
1226 case Attribute::TombstoneKey:
1227 llvm_unreachable("Synthetic enumerators which should never get here")::llvm::llvm_unreachable_internal("Synthetic enumerators which should never get here"
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 1227)
;
1228
1229 case Attribute::None: return 0;
1230 case Attribute::ZExt: return 1 << 0;
1231 case Attribute::SExt: return 1 << 1;
1232 case Attribute::NoReturn: return 1 << 2;
1233 case Attribute::InReg: return 1 << 3;
1234 case Attribute::StructRet: return 1 << 4;
1235 case Attribute::NoUnwind: return 1 << 5;
1236 case Attribute::NoAlias: return 1 << 6;
1237 case Attribute::ByVal: return 1 << 7;
1238 case Attribute::Nest: return 1 << 8;
1239 case Attribute::ReadNone: return 1 << 9;
1240 case Attribute::ReadOnly: return 1 << 10;
1241 case Attribute::NoInline: return 1 << 11;
1242 case Attribute::AlwaysInline: return 1 << 12;
1243 case Attribute::OptimizeForSize: return 1 << 13;
1244 case Attribute::StackProtect: return 1 << 14;
1245 case Attribute::StackProtectReq: return 1 << 15;
1246 case Attribute::Alignment: return 31 << 16;
1247 case Attribute::NoCapture: return 1 << 21;
1248 case Attribute::NoRedZone: return 1 << 22;
1249 case Attribute::NoImplicitFloat: return 1 << 23;
1250 case Attribute::Naked: return 1 << 24;
1251 case Attribute::InlineHint: return 1 << 25;
1252 case Attribute::StackAlignment: return 7 << 26;
1253 case Attribute::ReturnsTwice: return 1 << 29;
1254 case Attribute::UWTable: return 1 << 30;
1255 case Attribute::NonLazyBind: return 1U << 31;
1256 case Attribute::SanitizeAddress: return 1ULL << 32;
1257 case Attribute::MinSize: return 1ULL << 33;
1258 case Attribute::NoDuplicate: return 1ULL << 34;
1259 case Attribute::StackProtectStrong: return 1ULL << 35;
1260 case Attribute::SanitizeThread: return 1ULL << 36;
1261 case Attribute::SanitizeMemory: return 1ULL << 37;
1262 case Attribute::NoBuiltin: return 1ULL << 38;
1263 case Attribute::Returned: return 1ULL << 39;
1264 case Attribute::Cold: return 1ULL << 40;
1265 case Attribute::Builtin: return 1ULL << 41;
1266 case Attribute::OptimizeNone: return 1ULL << 42;
1267 case Attribute::InAlloca: return 1ULL << 43;
1268 case Attribute::NonNull: return 1ULL << 44;
1269 case Attribute::JumpTable: return 1ULL << 45;
1270 case Attribute::Convergent: return 1ULL << 46;
1271 case Attribute::SafeStack: return 1ULL << 47;
1272 case Attribute::NoRecurse: return 1ULL << 48;
1273 case Attribute::InaccessibleMemOnly: return 1ULL << 49;
1274 case Attribute::InaccessibleMemOrArgMemOnly: return 1ULL << 50;
1275 case Attribute::SwiftSelf: return 1ULL << 51;
1276 case Attribute::SwiftError: return 1ULL << 52;
1277 case Attribute::WriteOnly: return 1ULL << 53;
1278 case Attribute::Speculatable: return 1ULL << 54;
1279 case Attribute::StrictFP: return 1ULL << 55;
1280 case Attribute::SanitizeHWAddress: return 1ULL << 56;
1281 case Attribute::NoCfCheck: return 1ULL << 57;
1282 case Attribute::OptForFuzzing: return 1ULL << 58;
1283 case Attribute::ShadowCallStack: return 1ULL << 59;
1284 case Attribute::SpeculativeLoadHardening:
1285 return 1ULL << 60;
1286 case Attribute::ImmArg:
1287 return 1ULL << 61;
1288 case Attribute::WillReturn:
1289 return 1ULL << 62;
1290 case Attribute::NoFree:
1291 return 1ULL << 63;
1292 default:
1293 // Other attributes are not supported in the raw format,
1294 // as we ran out of space.
1295 return 0;
1296 }
1297 llvm_unreachable("Unsupported attribute type")::llvm::llvm_unreachable_internal("Unsupported attribute type"
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 1297)
;
1298}
1299
1300static void addRawAttributeValue(AttrBuilder &B, uint64_t Val) {
1301 if (!Val) return;
1302
1303 for (Attribute::AttrKind I = Attribute::None; I != Attribute::EndAttrKinds;
1304 I = Attribute::AttrKind(I + 1)) {
1305 if (uint64_t A = (Val & getRawAttributeMask(I))) {
1306 if (I == Attribute::Alignment)
1307 B.addAlignmentAttr(1ULL << ((A >> 16) - 1));
1308 else if (I == Attribute::StackAlignment)
1309 B.addStackAlignmentAttr(1ULL << ((A >> 26)-1));
1310 else
1311 B.addAttribute(I);
1312 }
1313 }
1314}
1315
1316/// This fills an AttrBuilder object with the LLVM attributes that have
1317/// been decoded from the given integer. This function must stay in sync with
1318/// 'encodeLLVMAttributesForBitcode'.
1319static void decodeLLVMAttributesForBitcode(AttrBuilder &B,
1320 uint64_t EncodedAttrs) {
1321 // The alignment is stored as a 16-bit raw value from bits 31--16. We shift
1322 // the bits above 31 down by 11 bits.
1323 unsigned Alignment = (EncodedAttrs & (0xffffULL << 16)) >> 16;
1324 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-12~++20210124100612+2afaf072f5c1/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 1325, __PRETTY_FUNCTION__))
1325 "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-12~++20210124100612+2afaf072f5c1/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 1325, __PRETTY_FUNCTION__))
;
1326
1327 if (Alignment)
1328 B.addAlignmentAttr(Alignment);
1329 addRawAttributeValue(B, ((EncodedAttrs & (0xfffffULL << 32)) >> 11) |
1330 (EncodedAttrs & 0xffff));
1331}
1332
1333Error BitcodeReader::parseAttributeBlock() {
1334 if (Error Err = Stream.EnterSubBlock(bitc::PARAMATTR_BLOCK_ID))
1335 return Err;
1336
1337 if (!MAttributes.empty())
1338 return error("Invalid multiple blocks");
1339
1340 SmallVector<uint64_t, 64> Record;
1341
1342 SmallVector<AttributeList, 8> Attrs;
1343
1344 // Read all the records.
1345 while (true) {
1346 Expected<BitstreamEntry> MaybeEntry = Stream.advanceSkippingSubblocks();
1347 if (!MaybeEntry)
1348 return MaybeEntry.takeError();
1349 BitstreamEntry Entry = MaybeEntry.get();
1350
1351 switch (Entry.Kind) {
1352 case BitstreamEntry::SubBlock: // Handled for us already.
1353 case BitstreamEntry::Error:
1354 return error("Malformed block");
1355 case BitstreamEntry::EndBlock:
1356 return Error::success();
1357 case BitstreamEntry::Record:
1358 // The interesting case.
1359 break;
1360 }
1361
1362 // Read a record.
1363 Record.clear();
1364 Expected<unsigned> MaybeRecord = Stream.readRecord(Entry.ID, Record);
1365 if (!MaybeRecord)
1366 return MaybeRecord.takeError();
1367 switch (MaybeRecord.get()) {
1368 default: // Default behavior: ignore.
1369 break;
1370 case bitc::PARAMATTR_CODE_ENTRY_OLD: // ENTRY: [paramidx0, attr0, ...]
1371 // Deprecated, but still needed to read old bitcode files.
1372 if (Record.size() & 1)
1373 return error("Invalid record");
1374
1375 for (unsigned i = 0, e = Record.size(); i != e; i += 2) {
1376 AttrBuilder B;
1377 decodeLLVMAttributesForBitcode(B, Record[i+1]);
1378 Attrs.push_back(AttributeList::get(Context, Record[i], B));
1379 }
1380
1381 MAttributes.push_back(AttributeList::get(Context, Attrs));
1382 Attrs.clear();
1383 break;
1384 case bitc::PARAMATTR_CODE_ENTRY: // ENTRY: [attrgrp0, attrgrp1, ...]
1385 for (unsigned i = 0, e = Record.size(); i != e; ++i)
1386 Attrs.push_back(MAttributeGroups[Record[i]]);
1387
1388 MAttributes.push_back(AttributeList::get(Context, Attrs));
1389 Attrs.clear();
1390 break;
1391 }
1392 }
1393}
1394
1395// Returns Attribute::None on unrecognized codes.
1396static Attribute::AttrKind getAttrFromCode(uint64_t Code) {
1397 switch (Code) {
1398 default:
1399 return Attribute::None;
1400 case bitc::ATTR_KIND_ALIGNMENT:
1401 return Attribute::Alignment;
1402 case bitc::ATTR_KIND_ALWAYS_INLINE:
1403 return Attribute::AlwaysInline;
1404 case bitc::ATTR_KIND_ARGMEMONLY:
1405 return Attribute::ArgMemOnly;
1406 case bitc::ATTR_KIND_BUILTIN:
1407 return Attribute::Builtin;
1408 case bitc::ATTR_KIND_BY_VAL:
1409 return Attribute::ByVal;
1410 case bitc::ATTR_KIND_IN_ALLOCA:
1411 return Attribute::InAlloca;
1412 case bitc::ATTR_KIND_COLD:
1413 return Attribute::Cold;
1414 case bitc::ATTR_KIND_CONVERGENT:
1415 return Attribute::Convergent;
1416 case bitc::ATTR_KIND_INACCESSIBLEMEM_ONLY:
1417 return Attribute::InaccessibleMemOnly;
1418 case bitc::ATTR_KIND_INACCESSIBLEMEM_OR_ARGMEMONLY:
1419 return Attribute::InaccessibleMemOrArgMemOnly;
1420 case bitc::ATTR_KIND_INLINE_HINT:
1421 return Attribute::InlineHint;
1422 case bitc::ATTR_KIND_IN_REG:
1423 return Attribute::InReg;
1424 case bitc::ATTR_KIND_JUMP_TABLE:
1425 return Attribute::JumpTable;
1426 case bitc::ATTR_KIND_MIN_SIZE:
1427 return Attribute::MinSize;
1428 case bitc::ATTR_KIND_NAKED:
1429 return Attribute::Naked;
1430 case bitc::ATTR_KIND_NEST:
1431 return Attribute::Nest;
1432 case bitc::ATTR_KIND_NO_ALIAS:
1433 return Attribute::NoAlias;
1434 case bitc::ATTR_KIND_NO_BUILTIN:
1435 return Attribute::NoBuiltin;
1436 case bitc::ATTR_KIND_NO_CALLBACK:
1437 return Attribute::NoCallback;
1438 case bitc::ATTR_KIND_NO_CAPTURE:
1439 return Attribute::NoCapture;
1440 case bitc::ATTR_KIND_NO_DUPLICATE:
1441 return Attribute::NoDuplicate;
1442 case bitc::ATTR_KIND_NOFREE:
1443 return Attribute::NoFree;
1444 case bitc::ATTR_KIND_NO_IMPLICIT_FLOAT:
1445 return Attribute::NoImplicitFloat;
1446 case bitc::ATTR_KIND_NO_INLINE:
1447 return Attribute::NoInline;
1448 case bitc::ATTR_KIND_NO_RECURSE:
1449 return Attribute::NoRecurse;
1450 case bitc::ATTR_KIND_NO_MERGE:
1451 return Attribute::NoMerge;
1452 case bitc::ATTR_KIND_NON_LAZY_BIND:
1453 return Attribute::NonLazyBind;
1454 case bitc::ATTR_KIND_NON_NULL:
1455 return Attribute::NonNull;
1456 case bitc::ATTR_KIND_DEREFERENCEABLE:
1457 return Attribute::Dereferenceable;
1458 case bitc::ATTR_KIND_DEREFERENCEABLE_OR_NULL:
1459 return Attribute::DereferenceableOrNull;
1460 case bitc::ATTR_KIND_ALLOC_SIZE:
1461 return Attribute::AllocSize;
1462 case bitc::ATTR_KIND_NO_RED_ZONE:
1463 return Attribute::NoRedZone;
1464 case bitc::ATTR_KIND_NO_RETURN:
1465 return Attribute::NoReturn;
1466 case bitc::ATTR_KIND_NOSYNC:
1467 return Attribute::NoSync;
1468 case bitc::ATTR_KIND_NOCF_CHECK:
1469 return Attribute::NoCfCheck;
1470 case bitc::ATTR_KIND_NO_UNWIND:
1471 return Attribute::NoUnwind;
1472 case bitc::ATTR_KIND_NULL_POINTER_IS_VALID:
1473 return Attribute::NullPointerIsValid;
1474 case bitc::ATTR_KIND_OPT_FOR_FUZZING:
1475 return Attribute::OptForFuzzing;
1476 case bitc::ATTR_KIND_OPTIMIZE_FOR_SIZE:
1477 return Attribute::OptimizeForSize;
1478 case bitc::ATTR_KIND_OPTIMIZE_NONE:
1479 return Attribute::OptimizeNone;
1480 case bitc::ATTR_KIND_READ_NONE:
1481 return Attribute::ReadNone;
1482 case bitc::ATTR_KIND_READ_ONLY:
1483 return Attribute::ReadOnly;
1484 case bitc::ATTR_KIND_RETURNED:
1485 return Attribute::Returned;
1486 case bitc::ATTR_KIND_RETURNS_TWICE:
1487 return Attribute::ReturnsTwice;
1488 case bitc::ATTR_KIND_S_EXT:
1489 return Attribute::SExt;
1490 case bitc::ATTR_KIND_SPECULATABLE:
1491 return Attribute::Speculatable;
1492 case bitc::ATTR_KIND_STACK_ALIGNMENT:
1493 return Attribute::StackAlignment;
1494 case bitc::ATTR_KIND_STACK_PROTECT:
1495 return Attribute::StackProtect;
1496 case bitc::ATTR_KIND_STACK_PROTECT_REQ:
1497 return Attribute::StackProtectReq;
1498 case bitc::ATTR_KIND_STACK_PROTECT_STRONG:
1499 return Attribute::StackProtectStrong;
1500 case bitc::ATTR_KIND_SAFESTACK:
1501 return Attribute::SafeStack;
1502 case bitc::ATTR_KIND_SHADOWCALLSTACK:
1503 return Attribute::ShadowCallStack;
1504 case bitc::ATTR_KIND_STRICT_FP:
1505 return Attribute::StrictFP;
1506 case bitc::ATTR_KIND_STRUCT_RET:
1507 return Attribute::StructRet;
1508 case bitc::ATTR_KIND_SANITIZE_ADDRESS:
1509 return Attribute::SanitizeAddress;
1510 case bitc::ATTR_KIND_SANITIZE_HWADDRESS:
1511 return Attribute::SanitizeHWAddress;
1512 case bitc::ATTR_KIND_SANITIZE_THREAD:
1513 return Attribute::SanitizeThread;
1514 case bitc::ATTR_KIND_SANITIZE_MEMORY:
1515 return Attribute::SanitizeMemory;
1516 case bitc::ATTR_KIND_SPECULATIVE_LOAD_HARDENING:
1517 return Attribute::SpeculativeLoadHardening;
1518 case bitc::ATTR_KIND_SWIFT_ERROR:
1519 return Attribute::SwiftError;
1520 case bitc::ATTR_KIND_SWIFT_SELF:
1521 return Attribute::SwiftSelf;
1522 case bitc::ATTR_KIND_UW_TABLE:
1523 return Attribute::UWTable;
1524 case bitc::ATTR_KIND_WILLRETURN:
1525 return Attribute::WillReturn;
1526 case bitc::ATTR_KIND_WRITEONLY:
1527 return Attribute::WriteOnly;
1528 case bitc::ATTR_KIND_Z_EXT:
1529 return Attribute::ZExt;
1530 case bitc::ATTR_KIND_IMMARG:
1531 return Attribute::ImmArg;
1532 case bitc::ATTR_KIND_SANITIZE_MEMTAG:
1533 return Attribute::SanitizeMemTag;
1534 case bitc::ATTR_KIND_PREALLOCATED:
1535 return Attribute::Preallocated;
1536 case bitc::ATTR_KIND_NOUNDEF:
1537 return Attribute::NoUndef;
1538 case bitc::ATTR_KIND_BYREF:
1539 return Attribute::ByRef;
1540 case bitc::ATTR_KIND_MUSTPROGRESS:
1541 return Attribute::MustProgress;
1542 case bitc::ATTR_KIND_HOT:
1543 return Attribute::Hot;
1544 }
1545}
1546
1547Error BitcodeReader::parseAlignmentValue(uint64_t Exponent,
1548 MaybeAlign &Alignment) {
1549 // Note: Alignment in bitcode files is incremented by 1, so that zero
1550 // can be used for default alignment.
1551 if (Exponent > Value::MaxAlignmentExponent + 1)
1552 return error("Invalid alignment value");
1553 Alignment = decodeMaybeAlign(Exponent);
1554 return Error::success();
1555}
1556
1557Error BitcodeReader::parseAttrKind(uint64_t Code, Attribute::AttrKind *Kind) {
1558 *Kind = getAttrFromCode(Code);
1559 if (*Kind == Attribute::None)
1560 return error("Unknown attribute kind (" + Twine(Code) + ")");
1561 return Error::success();
1562}
1563
1564Error BitcodeReader::parseAttributeGroupBlock() {
1565 if (Error Err = Stream.EnterSubBlock(bitc::PARAMATTR_GROUP_BLOCK_ID))
1566 return Err;
1567
1568 if (!MAttributeGroups.empty())
1569 return error("Invalid multiple blocks");
1570
1571 SmallVector<uint64_t, 64> Record;
1572
1573 // Read all the records.
1574 while (true) {
1575 Expected<BitstreamEntry> MaybeEntry = Stream.advanceSkippingSubblocks();
1576 if (!MaybeEntry)
1577 return MaybeEntry.takeError();
1578 BitstreamEntry Entry = MaybeEntry.get();
1579
1580 switch (Entry.Kind) {
1581 case BitstreamEntry::SubBlock: // Handled for us already.
1582 case BitstreamEntry::Error:
1583 return error("Malformed block");
1584 case BitstreamEntry::EndBlock:
1585 return Error::success();
1586 case BitstreamEntry::Record:
1587 // The interesting case.
1588 break;
1589 }
1590
1591 // Read a record.
1592 Record.clear();
1593 Expected<unsigned> MaybeRecord = Stream.readRecord(Entry.ID, Record);
1594 if (!MaybeRecord)
1595 return MaybeRecord.takeError();
1596 switch (MaybeRecord.get()) {
1597 default: // Default behavior: ignore.
1598 break;
1599 case bitc::PARAMATTR_GRP_CODE_ENTRY: { // ENTRY: [grpid, idx, a0, a1, ...]
1600 if (Record.size() < 3)
1601 return error("Invalid record");
1602
1603 uint64_t GrpID = Record[0];
1604 uint64_t Idx = Record[1]; // Index of the object this attribute refers to.
1605
1606 AttrBuilder B;
1607 for (unsigned i = 2, e = Record.size(); i != e; ++i) {
1608 if (Record[i] == 0) { // Enum attribute
1609 Attribute::AttrKind Kind;
1610 if (Error Err = parseAttrKind(Record[++i], &Kind))
1611 return Err;
1612
1613 // Upgrade old-style byval attribute to one with a type, even if it's
1614 // nullptr. We will have to insert the real type when we associate
1615 // this AttributeList with a function.
1616 if (Kind == Attribute::ByVal)
1617 B.addByValAttr(nullptr);
1618 else if (Kind == Attribute::StructRet)
1619 B.addStructRetAttr(nullptr);
1620
1621 B.addAttribute(Kind);
1622 } else if (Record[i] == 1) { // Integer attribute
1623 Attribute::AttrKind Kind;
1624 if (Error Err = parseAttrKind(Record[++i], &Kind))
1625 return Err;
1626 if (Kind == Attribute::Alignment)
1627 B.addAlignmentAttr(Record[++i]);
1628 else if (Kind == Attribute::StackAlignment)
1629 B.addStackAlignmentAttr(Record[++i]);
1630 else if (Kind == Attribute::Dereferenceable)
1631 B.addDereferenceableAttr(Record[++i]);
1632 else if (Kind == Attribute::DereferenceableOrNull)
1633 B.addDereferenceableOrNullAttr(Record[++i]);
1634 else if (Kind == Attribute::AllocSize)
1635 B.addAllocSizeAttrFromRawRepr(Record[++i]);
1636 } else if (Record[i] == 3 || Record[i] == 4) { // String attribute
1637 bool HasValue = (Record[i++] == 4);
1638 SmallString<64> KindStr;
1639 SmallString<64> ValStr;
1640
1641 while (Record[i] != 0 && i != e)
1642 KindStr += Record[i++];
1643 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-12~++20210124100612+2afaf072f5c1/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 1643, __PRETTY_FUNCTION__))
;
1644
1645 if (HasValue) {
1646 // Has a value associated with it.
1647 ++i; // Skip the '0' that terminates the "kind" string.
1648 while (Record[i] != 0 && i != e)
1649 ValStr += Record[i++];
1650 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-12~++20210124100612+2afaf072f5c1/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 1650, __PRETTY_FUNCTION__))
;
1651 }
1652
1653 B.addAttribute(KindStr.str(), ValStr.str());
1654 } else {
1655 assert((Record[i] == 5 || Record[i] == 6) &&(((Record[i] == 5 || Record[i] == 6) && "Invalid attribute group entry"
) ? static_cast<void> (0) : __assert_fail ("(Record[i] == 5 || Record[i] == 6) && \"Invalid attribute group entry\""
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 1656, __PRETTY_FUNCTION__))
1656 "Invalid attribute group entry")(((Record[i] == 5 || Record[i] == 6) && "Invalid attribute group entry"
) ? static_cast<void> (0) : __assert_fail ("(Record[i] == 5 || Record[i] == 6) && \"Invalid attribute group entry\""
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 1656, __PRETTY_FUNCTION__))
;
1657 bool HasType = Record[i] == 6;
1658 Attribute::AttrKind Kind;
1659 if (Error Err = parseAttrKind(Record[++i], &Kind))
1660 return Err;
1661 if (Kind == Attribute::ByVal) {
1662 B.addByValAttr(HasType ? getTypeByID(Record[++i]) : nullptr);
1663 } else if (Kind == Attribute::StructRet) {
1664 B.addStructRetAttr(HasType ? getTypeByID(Record[++i]) : nullptr);
1665 } else if (Kind == Attribute::ByRef) {
1666 B.addByRefAttr(getTypeByID(Record[++i]));
1667 } else if (Kind == Attribute::Preallocated) {
1668 B.addPreallocatedAttr(getTypeByID(Record[++i]));
1669 }
1670 }
1671 }
1672
1673 UpgradeAttributes(B);
1674 MAttributeGroups[GrpID] = AttributeList::get(Context, Idx, B);
1675 break;
1676 }
1677 }
1678 }
1679}
1680
1681Error BitcodeReader::parseTypeTable() {
1682 if (Error Err = Stream.EnterSubBlock(bitc::TYPE_BLOCK_ID_NEW))
1683 return Err;
1684
1685 return parseTypeTableBody();
1686}
1687
1688Error BitcodeReader::parseTypeTableBody() {
1689 if (!TypeList.empty())
1690 return error("Invalid multiple blocks");
1691
1692 SmallVector<uint64_t, 64> Record;
1693 unsigned NumRecords = 0;
1694
1695 SmallString<64> TypeName;
1696
1697 // Read all the records for this type table.
1698 while (true) {
1699 Expected<BitstreamEntry> MaybeEntry = Stream.advanceSkippingSubblocks();
1700 if (!MaybeEntry)
1701 return MaybeEntry.takeError();
1702 BitstreamEntry Entry = MaybeEntry.get();
1703
1704 switch (Entry.Kind) {
1705 case BitstreamEntry::SubBlock: // Handled for us already.
1706 case BitstreamEntry::Error:
1707 return error("Malformed block");
1708 case BitstreamEntry::EndBlock:
1709 if (NumRecords != TypeList.size())
1710 return error("Malformed block");
1711 return Error::success();
1712 case BitstreamEntry::Record:
1713 // The interesting case.
1714 break;
1715 }
1716
1717 // Read a record.
1718 Record.clear();
1719 Type *ResultTy = nullptr;
1720 Expected<unsigned> MaybeRecord = Stream.readRecord(Entry.ID, Record);
1721 if (!MaybeRecord)
1722 return MaybeRecord.takeError();
1723 switch (MaybeRecord.get()) {
1724 default:
1725 return error("Invalid value");
1726 case bitc::TYPE_CODE_NUMENTRY: // TYPE_CODE_NUMENTRY: [numentries]
1727 // TYPE_CODE_NUMENTRY contains a count of the number of types in the
1728 // type list. This allows us to reserve space.
1729 if (Record.empty())
1730 return error("Invalid record");
1731 TypeList.resize(Record[0]);
1732 continue;
1733 case bitc::TYPE_CODE_VOID: // VOID
1734 ResultTy = Type::getVoidTy(Context);
1735 break;
1736 case bitc::TYPE_CODE_HALF: // HALF
1737 ResultTy = Type::getHalfTy(Context);
1738 break;
1739 case bitc::TYPE_CODE_BFLOAT: // BFLOAT
1740 ResultTy = Type::getBFloatTy(Context);
1741 break;
1742 case bitc::TYPE_CODE_FLOAT: // FLOAT
1743 ResultTy = Type::getFloatTy(Context);
1744 break;
1745 case bitc::TYPE_CODE_DOUBLE: // DOUBLE
1746 ResultTy = Type::getDoubleTy(Context);
1747 break;
1748 case bitc::TYPE_CODE_X86_FP80: // X86_FP80
1749 ResultTy = Type::getX86_FP80Ty(Context);
1750 break;
1751 case bitc::TYPE_CODE_FP128: // FP128
1752 ResultTy = Type::getFP128Ty(Context);
1753 break;
1754 case bitc::TYPE_CODE_PPC_FP128: // PPC_FP128
1755 ResultTy = Type::getPPC_FP128Ty(Context);
1756 break;
1757 case bitc::TYPE_CODE_LABEL: // LABEL
1758 ResultTy = Type::getLabelTy(Context);
1759 break;
1760 case bitc::TYPE_CODE_METADATA: // METADATA
1761 ResultTy = Type::getMetadataTy(Context);
1762 break;
1763 case bitc::TYPE_CODE_X86_MMX: // X86_MMX
1764 ResultTy = Type::getX86_MMXTy(Context);
1765 break;
1766 case bitc::TYPE_CODE_X86_AMX: // X86_AMX
1767 ResultTy = Type::getX86_AMXTy(Context);
1768 break;
1769 case bitc::TYPE_CODE_TOKEN: // TOKEN
1770 ResultTy = Type::getTokenTy(Context);
1771 break;
1772 case bitc::TYPE_CODE_INTEGER: { // INTEGER: [width]
1773 if (Record.empty())
1774 return error("Invalid record");
1775
1776 uint64_t NumBits = Record[0];
1777 if (NumBits < IntegerType::MIN_INT_BITS ||
1778 NumBits > IntegerType::MAX_INT_BITS)
1779 return error("Bitwidth for integer type out of range");
1780 ResultTy = IntegerType::get(Context, NumBits);
1781 break;
1782 }
1783 case bitc::TYPE_CODE_POINTER: { // POINTER: [pointee type] or
1784 // [pointee type, address space]
1785 if (Record.empty())
1786 return error("Invalid record");
1787 unsigned AddressSpace = 0;
1788 if (Record.size() == 2)
1789 AddressSpace = Record[1];
1790 ResultTy = getTypeByID(Record[0]);
1791 if (!ResultTy ||
1792 !PointerType::isValidElementType(ResultTy))
1793 return error("Invalid type");
1794 ResultTy = PointerType::get(ResultTy, AddressSpace);
1795 break;
1796 }
1797 case bitc::TYPE_CODE_FUNCTION_OLD: {
1798 // Deprecated, but still needed to read old bitcode files.
1799 // FUNCTION: [vararg, attrid, retty, paramty x N]
1800 if (Record.size() < 3)
1801 return error("Invalid record");
1802 SmallVector<Type*, 8> ArgTys;
1803 for (unsigned i = 3, e = Record.size(); i != e; ++i) {
1804 if (Type *T = getTypeByID(Record[i]))
1805 ArgTys.push_back(T);
1806 else
1807 break;
1808 }
1809
1810 ResultTy = getTypeByID(Record[2]);
1811 if (!ResultTy || ArgTys.size() < Record.size()-3)
1812 return error("Invalid type");
1813
1814 ResultTy = FunctionType::get(ResultTy, ArgTys, Record[0]);
1815 break;
1816 }
1817 case bitc::TYPE_CODE_FUNCTION: {
1818 // FUNCTION: [vararg, retty, paramty x N]
1819 if (Record.size() < 2)
1820 return error("Invalid record");
1821 SmallVector<Type*, 8> ArgTys;
1822 for (unsigned i = 2, e = Record.size(); i != e; ++i) {
1823 if (Type *T = getTypeByID(Record[i])) {
1824 if (!FunctionType::isValidArgumentType(T))
1825 return error("Invalid function argument type");
1826 ArgTys.push_back(T);
1827 }
1828 else
1829 break;
1830 }
1831
1832 ResultTy = getTypeByID(Record[1]);
1833 if (!ResultTy || ArgTys.size() < Record.size()-2)
1834 return error("Invalid type");
1835
1836 ResultTy = FunctionType::get(ResultTy, ArgTys, Record[0]);
1837 break;
1838 }
1839 case bitc::TYPE_CODE_STRUCT_ANON: { // STRUCT: [ispacked, eltty x N]
1840 if (Record.empty())
1841 return error("Invalid record");
1842 SmallVector<Type*, 8> EltTys;
1843 for (unsigned i = 1, e = Record.size(); i != e; ++i) {
1844 if (Type *T = getTypeByID(Record[i]))
1845 EltTys.push_back(T);
1846 else
1847 break;
1848 }
1849 if (EltTys.size() != Record.size()-1)
1850 return error("Invalid type");
1851 ResultTy = StructType::get(Context, EltTys, Record[0]);
1852 break;
1853 }
1854 case bitc::TYPE_CODE_STRUCT_NAME: // STRUCT_NAME: [strchr x N]
1855 if (convertToString(Record, 0, TypeName))
1856 return error("Invalid record");
1857 continue;
1858
1859 case bitc::TYPE_CODE_STRUCT_NAMED: { // STRUCT: [ispacked, eltty x N]
1860 if (Record.empty())
1861 return error("Invalid record");
1862
1863 if (NumRecords >= TypeList.size())
1864 return error("Invalid TYPE table");
1865
1866 // Check to see if this was forward referenced, if so fill in the temp.
1867 StructType *Res = cast_or_null<StructType>(TypeList[NumRecords]);
1868 if (Res) {
1869 Res->setName(TypeName);
1870 TypeList[NumRecords] = nullptr;
1871 } else // Otherwise, create a new struct.
1872 Res = createIdentifiedStructType(Context, TypeName);
1873 TypeName.clear();
1874
1875 SmallVector<Type*, 8> EltTys;
1876 for (unsigned i = 1, e = Record.size(); i != e; ++i) {
1877 if (Type *T = getTypeByID(Record[i]))
1878 EltTys.push_back(T);
1879 else
1880 break;
1881 }
1882 if (EltTys.size() != Record.size()-1)
1883 return error("Invalid record");
1884 Res->setBody(EltTys, Record[0]);
1885 ResultTy = Res;
1886 break;
1887 }
1888 case bitc::TYPE_CODE_OPAQUE: { // OPAQUE: []
1889 if (Record.size() != 1)
1890 return error("Invalid record");
1891
1892 if (NumRecords >= TypeList.size())
1893 return error("Invalid TYPE table");
1894
1895 // Check to see if this was forward referenced, if so fill in the temp.
1896 StructType *Res = cast_or_null<StructType>(TypeList[NumRecords]);
1897 if (Res) {
1898 Res->setName(TypeName);
1899 TypeList[NumRecords] = nullptr;
1900 } else // Otherwise, create a new struct with no body.
1901 Res = createIdentifiedStructType(Context, TypeName);
1902 TypeName.clear();
1903 ResultTy = Res;
1904 break;
1905 }
1906 case bitc::TYPE_CODE_ARRAY: // ARRAY: [numelts, eltty]
1907 if (Record.size() < 2)
1908 return error("Invalid record");
1909 ResultTy = getTypeByID(Record[1]);
1910 if (!ResultTy || !ArrayType::isValidElementType(ResultTy))
1911 return error("Invalid type");
1912 ResultTy = ArrayType::get(ResultTy, Record[0]);
1913 break;
1914 case bitc::TYPE_CODE_VECTOR: // VECTOR: [numelts, eltty] or
1915 // [numelts, eltty, scalable]
1916 if (Record.size() < 2)
1917 return error("Invalid record");
1918 if (Record[0] == 0)
1919 return error("Invalid vector length");
1920 ResultTy = getTypeByID(Record[1]);
1921 if (!ResultTy || !StructType::isValidElementType(ResultTy))
1922 return error("Invalid type");
1923 bool Scalable = Record.size() > 2 ? Record[2] : false;
1924 ResultTy = VectorType::get(ResultTy, Record[0], Scalable);
1925 break;
1926 }
1927
1928 if (NumRecords >= TypeList.size())
1929 return error("Invalid TYPE table");
1930 if (TypeList[NumRecords])
1931 return error(
1932 "Invalid TYPE table: Only named structs can be forward referenced");
1933 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-12~++20210124100612+2afaf072f5c1/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 1933, __PRETTY_FUNCTION__))
;
1934 TypeList[NumRecords++] = ResultTy;
1935 }
1936}
1937
1938Error BitcodeReader::parseOperandBundleTags() {
1939 if (Error Err = Stream.EnterSubBlock(bitc::OPERAND_BUNDLE_TAGS_BLOCK_ID))
1940 return Err;
1941
1942 if (!BundleTags.empty())
1943 return error("Invalid multiple blocks");
1944
1945 SmallVector<uint64_t, 64> Record;
1946
1947 while (true) {
1948 Expected<BitstreamEntry> MaybeEntry = Stream.advanceSkippingSubblocks();
1949 if (!MaybeEntry)
1950 return MaybeEntry.takeError();
1951 BitstreamEntry Entry = MaybeEntry.get();
1952
1953 switch (Entry.Kind) {
1954 case BitstreamEntry::SubBlock: // Handled for us already.
1955 case BitstreamEntry::Error:
1956 return error("Malformed block");
1957 case BitstreamEntry::EndBlock:
1958 return Error::success();
1959 case BitstreamEntry::Record:
1960 // The interesting case.
1961 break;
1962 }
1963
1964 // Tags are implicitly mapped to integers by their order.
1965
1966 Expected<unsigned> MaybeRecord = Stream.readRecord(Entry.ID, Record);
1967 if (!MaybeRecord)
1968 return MaybeRecord.takeError();
1969 if (MaybeRecord.get() != bitc::OPERAND_BUNDLE_TAG)
1970 return error("Invalid record");
1971
1972 // OPERAND_BUNDLE_TAG: [strchr x N]
1973 BundleTags.emplace_back();
1974 if (convertToString(Record, 0, BundleTags.back()))
1975 return error("Invalid record");
1976 Record.clear();
1977 }
1978}
1979
1980Error BitcodeReader::parseSyncScopeNames() {
1981 if (Error Err = Stream.EnterSubBlock(bitc::SYNC_SCOPE_NAMES_BLOCK_ID))
1982 return Err;
1983
1984 if (!SSIDs.empty())
1985 return error("Invalid multiple synchronization scope names blocks");
1986
1987 SmallVector<uint64_t, 64> Record;
1988 while (true) {
1989 Expected<BitstreamEntry> MaybeEntry = Stream.advanceSkippingSubblocks();
1990 if (!MaybeEntry)
1991 return MaybeEntry.takeError();
1992 BitstreamEntry Entry = MaybeEntry.get();
1993
1994 switch (Entry.Kind) {
1995 case BitstreamEntry::SubBlock: // Handled for us already.
1996 case BitstreamEntry::Error:
1997 return error("Malformed block");
1998 case BitstreamEntry::EndBlock:
1999 if (SSIDs.empty())
2000 return error("Invalid empty synchronization scope names block");
2001 return Error::success();
2002 case BitstreamEntry::Record:
2003 // The interesting case.
2004 break;
2005 }
2006
2007 // Synchronization scope names are implicitly mapped to synchronization
2008 // scope IDs by their order.
2009
2010 Expected<unsigned> MaybeRecord = Stream.readRecord(Entry.ID, Record);
2011 if (!MaybeRecord)
2012 return MaybeRecord.takeError();
2013 if (MaybeRecord.get() != bitc::SYNC_SCOPE_NAME)
2014 return error("Invalid record");
2015
2016 SmallString<16> SSN;
2017 if (convertToString(Record, 0, SSN))
2018 return error("Invalid record");
2019
2020 SSIDs.push_back(Context.getOrInsertSyncScopeID(SSN));
2021 Record.clear();
2022 }
2023}
2024
2025/// Associate a value with its name from the given index in the provided record.
2026Expected<Value *> BitcodeReader::recordValue(SmallVectorImpl<uint64_t> &Record,
2027 unsigned NameIndex, Triple &TT) {
2028 SmallString<128> ValueName;
2029 if (convertToString(Record, NameIndex, ValueName))
2030 return error("Invalid record");
2031 unsigned ValueID = Record[0];
2032 if (ValueID >= ValueList.size() || !ValueList[ValueID])
2033 return error("Invalid record");
2034 Value *V = ValueList[ValueID];
2035
2036 StringRef NameStr(ValueName.data(), ValueName.size());
2037 if (NameStr.find_first_of(0) != StringRef::npos)
2038 return error("Invalid value name");
2039 V->setName(NameStr);
2040 auto *GO = dyn_cast<GlobalObject>(V);
2041 if (GO) {
2042 if (GO->getComdat() == reinterpret_cast<Comdat *>(1)) {
2043 if (TT.supportsCOMDAT())
2044 GO->setComdat(TheModule->getOrInsertComdat(V->getName()));
2045 else
2046 GO->setComdat(nullptr);
2047 }
2048 }
2049 return V;
2050}
2051
2052/// Helper to note and return the current location, and jump to the given
2053/// offset.
2054static Expected<uint64_t> jumpToValueSymbolTable(uint64_t Offset,
2055 BitstreamCursor &Stream) {
2056 // Save the current parsing location so we can jump back at the end
2057 // of the VST read.
2058 uint64_t CurrentBit = Stream.GetCurrentBitNo();
2059 if (Error JumpFailed = Stream.JumpToBit(Offset * 32))
2060 return std::move(JumpFailed);
2061 Expected<BitstreamEntry> MaybeEntry = Stream.advance();
2062 if (!MaybeEntry)
2063 return MaybeEntry.takeError();
2064 assert(MaybeEntry.get().Kind == BitstreamEntry::SubBlock)((MaybeEntry.get().Kind == BitstreamEntry::SubBlock) ? static_cast
<void> (0) : __assert_fail ("MaybeEntry.get().Kind == BitstreamEntry::SubBlock"
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 2064, __PRETTY_FUNCTION__))
;
2065 assert(MaybeEntry.get().ID == bitc::VALUE_SYMTAB_BLOCK_ID)((MaybeEntry.get().ID == bitc::VALUE_SYMTAB_BLOCK_ID) ? static_cast
<void> (0) : __assert_fail ("MaybeEntry.get().ID == bitc::VALUE_SYMTAB_BLOCK_ID"
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 2065, __PRETTY_FUNCTION__))
;
2066 return CurrentBit;
2067}
2068
2069void BitcodeReader::setDeferredFunctionInfo(unsigned FuncBitcodeOffsetDelta,
2070 Function *F,
2071 ArrayRef<uint64_t> Record) {
2072 // Note that we subtract 1 here because the offset is relative to one word
2073 // before the start of the identification or module block, which was
2074 // historically always the start of the regular bitcode header.
2075 uint64_t FuncWordOffset = Record[1] - 1;
2076 uint64_t FuncBitOffset = FuncWordOffset * 32;
2077 DeferredFunctionInfo[F] = FuncBitOffset + FuncBitcodeOffsetDelta;
2078 // Set the LastFunctionBlockBit to point to the last function block.
2079 // Later when parsing is resumed after function materialization,
2080 // we can simply skip that last function block.
2081 if (FuncBitOffset > LastFunctionBlockBit)
2082 LastFunctionBlockBit = FuncBitOffset;
2083}
2084
2085/// Read a new-style GlobalValue symbol table.
2086Error BitcodeReader::parseGlobalValueSymbolTable() {
2087 unsigned FuncBitcodeOffsetDelta =
2088 Stream.getAbbrevIDWidth() + bitc::BlockIDWidth;
2089
2090 if (Error Err = Stream.EnterSubBlock(bitc::VALUE_SYMTAB_BLOCK_ID))
2091 return Err;
2092
2093 SmallVector<uint64_t, 64> Record;
2094 while (true) {
2095 Expected<BitstreamEntry> MaybeEntry = Stream.advanceSkippingSubblocks();
2096 if (!MaybeEntry)
2097 return MaybeEntry.takeError();
2098 BitstreamEntry Entry = MaybeEntry.get();
2099
2100 switch (Entry.Kind) {
2101 case BitstreamEntry::SubBlock:
2102 case BitstreamEntry::Error:
2103 return error("Malformed block");
2104 case BitstreamEntry::EndBlock:
2105 return Error::success();
2106 case BitstreamEntry::Record:
2107 break;
2108 }
2109
2110 Record.clear();
2111 Expected<unsigned> MaybeRecord = Stream.readRecord(Entry.ID, Record);
2112 if (!MaybeRecord)
2113 return MaybeRecord.takeError();
2114 switch (MaybeRecord.get()) {
2115 case bitc::VST_CODE_FNENTRY: // [valueid, offset]
2116 setDeferredFunctionInfo(FuncBitcodeOffsetDelta,
2117 cast<Function>(ValueList[Record[0]]), Record);
2118 break;
2119 }
2120 }
2121}
2122
2123/// Parse the value symbol table at either the current parsing location or
2124/// at the given bit offset if provided.
2125Error BitcodeReader::parseValueSymbolTable(uint64_t Offset) {
2126 uint64_t CurrentBit;
2127 // Pass in the Offset to distinguish between calling for the module-level
2128 // VST (where we want to jump to the VST offset) and the function-level
2129 // VST (where we don't).
2130 if (Offset > 0) {
2131 Expected<uint64_t> MaybeCurrentBit = jumpToValueSymbolTable(Offset, Stream);
2132 if (!MaybeCurrentBit)
2133 return MaybeCurrentBit.takeError();
2134 CurrentBit = MaybeCurrentBit.get();
2135 // If this module uses a string table, read this as a module-level VST.
2136 if (UseStrtab) {
2137 if (Error Err = parseGlobalValueSymbolTable())
2138 return Err;
2139 if (Error JumpFailed = Stream.JumpToBit(CurrentBit))
2140 return JumpFailed;
2141 return Error::success();
2142 }
2143 // Otherwise, the VST will be in a similar format to a function-level VST,
2144 // and will contain symbol names.
2145 }
2146
2147 // Compute the delta between the bitcode indices in the VST (the word offset
2148 // to the word-aligned ENTER_SUBBLOCK for the function block, and that
2149 // expected by the lazy reader. The reader's EnterSubBlock expects to have
2150 // already read the ENTER_SUBBLOCK code (size getAbbrevIDWidth) and BlockID
2151 // (size BlockIDWidth). Note that we access the stream's AbbrevID width here
2152 // just before entering the VST subblock because: 1) the EnterSubBlock
2153 // changes the AbbrevID width; 2) the VST block is nested within the same
2154 // outer MODULE_BLOCK as the FUNCTION_BLOCKs and therefore have the same
2155 // AbbrevID width before calling EnterSubBlock; and 3) when we want to
2156 // jump to the FUNCTION_BLOCK using this offset later, we don't want
2157 // to rely on the stream's AbbrevID width being that of the MODULE_BLOCK.
2158 unsigned FuncBitcodeOffsetDelta =
2159 Stream.getAbbrevIDWidth() + bitc::BlockIDWidth;
2160
2161 if (Error Err = Stream.EnterSubBlock(bitc::VALUE_SYMTAB_BLOCK_ID))
2162 return Err;
2163
2164 SmallVector<uint64_t, 64> Record;
2165
2166 Triple TT(TheModule->getTargetTriple());
2167
2168 // Read all the records for this value table.
2169 SmallString<128> ValueName;
2170
2171 while (true) {
2172 Expected<BitstreamEntry> MaybeEntry = Stream.advanceSkippingSubblocks();
2173 if (!MaybeEntry)
2174 return MaybeEntry.takeError();
2175 BitstreamEntry Entry = MaybeEntry.get();
2176
2177 switch (Entry.Kind) {
2178 case BitstreamEntry::SubBlock: // Handled for us already.
2179 case BitstreamEntry::Error:
2180 return error("Malformed block");
2181 case BitstreamEntry::EndBlock:
2182 if (Offset > 0)
2183 if (Error JumpFailed = Stream.JumpToBit(CurrentBit))
2184 return JumpFailed;
2185 return Error::success();
2186 case BitstreamEntry::Record:
2187 // The interesting case.
2188 break;
2189 }
2190
2191 // Read a record.
2192 Record.clear();
2193 Expected<unsigned> MaybeRecord = Stream.readRecord(Entry.ID, Record);
2194 if (!MaybeRecord)
2195 return MaybeRecord.takeError();
2196 switch (MaybeRecord.get()) {
2197 default: // Default behavior: unknown type.
2198 break;
2199 case bitc::VST_CODE_ENTRY: { // VST_CODE_ENTRY: [valueid, namechar x N]
2200 Expected<Value *> ValOrErr = recordValue(Record, 1, TT);
2201 if (Error Err = ValOrErr.takeError())
2202 return Err;
2203 ValOrErr.get();
2204 break;
2205 }
2206 case bitc::VST_CODE_FNENTRY: {
2207 // VST_CODE_FNENTRY: [valueid, offset, namechar x N]
2208 Expected<Value *> ValOrErr = recordValue(Record, 2, TT);
2209 if (Error Err = ValOrErr.takeError())
2210 return Err;
2211 Value *V = ValOrErr.get();
2212
2213 // Ignore function offsets emitted for aliases of functions in older
2214 // versions of LLVM.
2215 if (auto *F = dyn_cast<Function>(V))
2216 setDeferredFunctionInfo(FuncBitcodeOffsetDelta, F, Record);
2217 break;
2218 }
2219 case bitc::VST_CODE_BBENTRY: {
2220 if (convertToString(Record, 1, ValueName))
2221 return error("Invalid record");
2222 BasicBlock *BB = getBasicBlock(Record[0]);
2223 if (!BB)
2224 return error("Invalid record");
2225
2226 BB->setName(StringRef(ValueName.data(), ValueName.size()));
2227 ValueName.clear();
2228 break;
2229 }
2230 }
2231 }
2232}
2233
2234/// Decode a signed value stored with the sign bit in the LSB for dense VBR
2235/// encoding.
2236uint64_t BitcodeReader::decodeSignRotatedValue(uint64_t V) {
2237 if ((V & 1) == 0)
2238 return V >> 1;
2239 if (V != 1)
2240 return -(V >> 1);
2241 // There is no such thing as -0 with integers. "-0" really means MININT.
2242 return 1ULL << 63;
2243}
2244
2245/// Resolve all of the initializers for global values and aliases that we can.
2246Error BitcodeReader::resolveGlobalAndIndirectSymbolInits() {
2247 std::vector<std::pair<GlobalVariable *, unsigned>> GlobalInitWorklist;
2248 std::vector<std::pair<GlobalIndirectSymbol *, unsigned>>
2249 IndirectSymbolInitWorklist;
2250 std::vector<std::pair<Function *, unsigned>> FunctionPrefixWorklist;
2251 std::vector<std::pair<Function *, unsigned>> FunctionPrologueWorklist;
2252 std::vector<std::pair<Function *, unsigned>> FunctionPersonalityFnWorklist;
2253
2254 GlobalInitWorklist.swap(GlobalInits);
2255 IndirectSymbolInitWorklist.swap(IndirectSymbolInits);
2256 FunctionPrefixWorklist.swap(FunctionPrefixes);
2257 FunctionPrologueWorklist.swap(FunctionPrologues);
2258 FunctionPersonalityFnWorklist.swap(FunctionPersonalityFns);
2259
2260 while (!GlobalInitWorklist.empty()) {
2261 unsigned ValID = GlobalInitWorklist.back().second;
2262 if (ValID >= ValueList.size()) {
2263 // Not ready to resolve this yet, it requires something later in the file.
2264 GlobalInits.push_back(GlobalInitWorklist.back());
2265 } else {
2266 if (Constant *C = dyn_cast_or_null<Constant>(ValueList[ValID]))
2267 GlobalInitWorklist.back().first->setInitializer(C);
2268 else
2269 return error("Expected a constant");
2270 }
2271 GlobalInitWorklist.pop_back();
2272 }
2273
2274 while (!IndirectSymbolInitWorklist.empty()) {
2275 unsigned ValID = IndirectSymbolInitWorklist.back().second;
2276 if (ValID >= ValueList.size()) {
2277 IndirectSymbolInits.push_back(IndirectSymbolInitWorklist.back());
2278 } else {
2279 Constant *C = dyn_cast_or_null<Constant>(ValueList[ValID]);
2280 if (!C)
2281 return error("Expected a constant");
2282 GlobalIndirectSymbol *GIS = IndirectSymbolInitWorklist.back().first;
2283 if (isa<GlobalAlias>(GIS) && C->getType() != GIS->getType())
2284 return error("Alias and aliasee types don't match");
2285 GIS->setIndirectSymbol(C);
2286 }
2287 IndirectSymbolInitWorklist.pop_back();
2288 }
2289
2290 while (!FunctionPrefixWorklist.empty()) {
2291 unsigned ValID = FunctionPrefixWorklist.back().second;
2292 if (ValID >= ValueList.size()) {
2293 FunctionPrefixes.push_back(FunctionPrefixWorklist.back());
2294 } else {
2295 if (Constant *C = dyn_cast_or_null<Constant>(ValueList[ValID]))
2296 FunctionPrefixWorklist.back().first->setPrefixData(C);
2297 else
2298 return error("Expected a constant");
2299 }
2300 FunctionPrefixWorklist.pop_back();
2301 }
2302
2303 while (!FunctionPrologueWorklist.empty()) {
2304 unsigned ValID = FunctionPrologueWorklist.back().second;
2305 if (ValID >= ValueList.size()) {
2306 FunctionPrologues.push_back(FunctionPrologueWorklist.back());
2307 } else {
2308 if (Constant *C = dyn_cast_or_null<Constant>(ValueList[ValID]))
2309 FunctionPrologueWorklist.back().first->setPrologueData(C);
2310 else
2311 return error("Expected a constant");
2312 }
2313 FunctionPrologueWorklist.pop_back();
2314 }
2315
2316 while (!FunctionPersonalityFnWorklist.empty()) {
2317 unsigned ValID = FunctionPersonalityFnWorklist.back().second;
2318 if (ValID >= ValueList.size()) {
2319 FunctionPersonalityFns.push_back(FunctionPersonalityFnWorklist.back());
2320 } else {
2321 if (Constant *C = dyn_cast_or_null<Constant>(ValueList[ValID]))
2322 FunctionPersonalityFnWorklist.back().first->setPersonalityFn(C);
2323 else
2324 return error("Expected a constant");
2325 }
2326 FunctionPersonalityFnWorklist.pop_back();
2327 }
2328
2329 return Error::success();
2330}
2331
2332APInt llvm::readWideAPInt(ArrayRef<uint64_t> Vals, unsigned TypeBits) {
2333 SmallVector<uint64_t, 8> Words(Vals.size());
2334 transform(Vals, Words.begin(),
2335 BitcodeReader::decodeSignRotatedValue);
2336
2337 return APInt(TypeBits, Words);
2338}
2339
2340Error BitcodeReader::parseConstants() {
2341 if (Error Err = Stream.EnterSubBlock(bitc::CONSTANTS_BLOCK_ID))
2342 return Err;
2343
2344 SmallVector<uint64_t, 64> Record;
2345
2346 // Read all the records for this value table.
2347 Type *CurTy = Type::getInt32Ty(Context);
2348 Type *CurFullTy = Type::getInt32Ty(Context);
2349 unsigned NextCstNo = ValueList.size();
2350
2351 struct DelayedShufTy {
2352 VectorType *OpTy;
2353 VectorType *RTy;
2354 Type *CurFullTy;
2355 uint64_t Op0Idx;
2356 uint64_t Op1Idx;
2357 uint64_t Op2Idx;
2358 unsigned CstNo;
2359 };
2360 std::vector<DelayedShufTy> DelayedShuffles;
2361 while (true) {
2362 Expected<BitstreamEntry> MaybeEntry = Stream.advanceSkippingSubblocks();
2363 if (!MaybeEntry)
2364 return MaybeEntry.takeError();
2365 BitstreamEntry Entry = MaybeEntry.get();
2366
2367 switch (Entry.Kind) {
2368 case BitstreamEntry::SubBlock: // Handled for us already.
2369 case BitstreamEntry::Error:
2370 return error("Malformed block");
2371 case BitstreamEntry::EndBlock:
2372 // Once all the constants have been read, go through and resolve forward
2373 // references.
2374 //
2375 // We have to treat shuffles specially because they don't have three
2376 // operands anymore. We need to convert the shuffle mask into an array,
2377 // and we can't convert a forward reference.
2378 for (auto &DelayedShuffle : DelayedShuffles) {
2379 VectorType *OpTy = DelayedShuffle.OpTy;
2380 VectorType *RTy = DelayedShuffle.RTy;
2381 uint64_t Op0Idx = DelayedShuffle.Op0Idx;
2382 uint64_t Op1Idx = DelayedShuffle.Op1Idx;
2383 uint64_t Op2Idx = DelayedShuffle.Op2Idx;
2384 uint64_t CstNo = DelayedShuffle.CstNo;
2385 Constant *Op0 = ValueList.getConstantFwdRef(Op0Idx, OpTy);
2386 Constant *Op1 = ValueList.getConstantFwdRef(Op1Idx, OpTy);
2387 Type *ShufTy =
2388 VectorType::get(Type::getInt32Ty(Context), RTy->getElementCount());
2389 Constant *Op2 = ValueList.getConstantFwdRef(Op2Idx, ShufTy);
2390 if (!ShuffleVectorInst::isValidOperands(Op0, Op1, Op2))
2391 return error("Invalid shufflevector operands");
2392 SmallVector<int, 16> Mask;
2393 ShuffleVectorInst::getShuffleMask(Op2, Mask);
2394 Value *V = ConstantExpr::getShuffleVector(Op0, Op1, Mask);
2395 ValueList.assignValue(V, CstNo, DelayedShuffle.CurFullTy);
2396 }
2397
2398 if (NextCstNo != ValueList.size())
2399 return error("Invalid constant reference");
2400
2401 ValueList.resolveConstantForwardRefs();
2402 return Error::success();
2403 case BitstreamEntry::Record:
2404 // The interesting case.
2405 break;
2406 }
2407
2408 // Read a record.
2409 Record.clear();
2410 Type *VoidType = Type::getVoidTy(Context);
2411 Value *V = nullptr;
2412 Expected<unsigned> MaybeBitCode = Stream.readRecord(Entry.ID, Record);
2413 if (!MaybeBitCode)
2414 return MaybeBitCode.takeError();
2415 switch (unsigned BitCode = MaybeBitCode.get()) {
2416 default: // Default behavior: unknown constant
2417 case bitc::CST_CODE_UNDEF: // UNDEF
2418 V = UndefValue::get(CurTy);
2419 break;
2420 case bitc::CST_CODE_POISON: // POISON
2421 V = PoisonValue::get(CurTy);
2422 break;
2423 case bitc::CST_CODE_SETTYPE: // SETTYPE: [typeid]
2424 if (Record.empty())
2425 return error("Invalid record");
2426 if (Record[0] >= TypeList.size() || !TypeList[Record[0]])
2427 return error("Invalid record");
2428 if (TypeList[Record[0]] == VoidType)
2429 return error("Invalid constant type");
2430 CurFullTy = TypeList[Record[0]];
2431 CurTy = flattenPointerTypes(CurFullTy);
2432 continue; // Skip the ValueList manipulation.
2433 case bitc::CST_CODE_NULL: // NULL
2434 if (CurTy->isVoidTy() || CurTy->isFunctionTy() || CurTy->isLabelTy())
2435 return error("Invalid type for a constant null value");
2436 V = Constant::getNullValue(CurTy);
2437 break;
2438 case bitc::CST_CODE_INTEGER: // INTEGER: [intval]
2439 if (!CurTy->isIntegerTy() || Record.empty())
2440 return error("Invalid record");
2441 V = ConstantInt::get(CurTy, decodeSignRotatedValue(Record[0]));
2442 break;
2443 case bitc::CST_CODE_WIDE_INTEGER: {// WIDE_INTEGER: [n x intval]
2444 if (!CurTy->isIntegerTy() || Record.empty())
2445 return error("Invalid record");
2446
2447 APInt VInt =
2448 readWideAPInt(Record, cast<IntegerType>(CurTy)->getBitWidth());
2449 V = ConstantInt::get(Context, VInt);
2450
2451 break;
2452 }
2453 case bitc::CST_CODE_FLOAT: { // FLOAT: [fpval]
2454 if (Record.empty())
2455 return error("Invalid record");
2456 if (CurTy->isHalfTy())
2457 V = ConstantFP::get(Context, APFloat(APFloat::IEEEhalf(),
2458 APInt(16, (uint16_t)Record[0])));
2459 else if (CurTy->isBFloatTy())
2460 V = ConstantFP::get(Context, APFloat(APFloat::BFloat(),
2461 APInt(16, (uint32_t)Record[0])));
2462 else if (CurTy->isFloatTy())
2463 V = ConstantFP::get(Context, APFloat(APFloat::IEEEsingle(),
2464 APInt(32, (uint32_t)Record[0])));
2465 else if (CurTy->isDoubleTy())
2466 V = ConstantFP::get(Context, APFloat(APFloat::IEEEdouble(),
2467 APInt(64, Record[0])));
2468 else if (CurTy->isX86_FP80Ty()) {
2469 // Bits are not stored the same way as a normal i80 APInt, compensate.
2470 uint64_t Rearrange[2];
2471 Rearrange[0] = (Record[1] & 0xffffLL) | (Record[0] << 16);
2472 Rearrange[1] = Record[0] >> 48;
2473 V = ConstantFP::get(Context, APFloat(APFloat::x87DoubleExtended(),
2474 APInt(80, Rearrange)));
2475 } else if (CurTy->isFP128Ty())
2476 V = ConstantFP::get(Context, APFloat(APFloat::IEEEquad(),
2477 APInt(128, Record)));
2478 else if (CurTy->isPPC_FP128Ty())
2479 V = ConstantFP::get(Context, APFloat(APFloat::PPCDoubleDouble(),
2480 APInt(128, Record)));
2481 else
2482 V = UndefValue::get(CurTy);
2483 break;
2484 }
2485
2486 case bitc::CST_CODE_AGGREGATE: {// AGGREGATE: [n x value number]
2487 if (Record.empty())
2488 return error("Invalid record");
2489
2490 unsigned Size = Record.size();
2491 SmallVector<Constant*, 16> Elts;
2492
2493 if (StructType *STy = dyn_cast<StructType>(CurTy)) {
2494 for (unsigned i = 0; i != Size; ++i)
2495 Elts.push_back(ValueList.getConstantFwdRef(Record[i],
2496 STy->getElementType(i)));
2497 V = ConstantStruct::get(STy, Elts);
2498 } else if (ArrayType *ATy = dyn_cast<ArrayType>(CurTy)) {
2499 Type *EltTy = ATy->getElementType();
2500 for (unsigned i = 0; i != Size; ++i)
2501 Elts.push_back(ValueList.getConstantFwdRef(Record[i], EltTy));
2502 V = ConstantArray::get(ATy, Elts);
2503 } else if (VectorType *VTy = dyn_cast<VectorType>(CurTy)) {
2504 Type *EltTy = VTy->getElementType();
2505 for (unsigned i = 0; i != Size; ++i)
2506 Elts.push_back(ValueList.getConstantFwdRef(Record[i], EltTy));
2507 V = ConstantVector::get(Elts);
2508 } else {
2509 V = UndefValue::get(CurTy);
2510 }
2511 break;
2512 }
2513 case bitc::CST_CODE_STRING: // STRING: [values]
2514 case bitc::CST_CODE_CSTRING: { // CSTRING: [values]
2515 if (Record.empty())
2516 return error("Invalid record");
2517
2518 SmallString<16> Elts(Record.begin(), Record.end());
2519 V = ConstantDataArray::getString(Context, Elts,
2520 BitCode == bitc::CST_CODE_CSTRING);
2521 break;
2522 }
2523 case bitc::CST_CODE_DATA: {// DATA: [n x value]
2524 if (Record.empty())
2525 return error("Invalid record");
2526
2527 Type *EltTy;
2528 if (auto *Array = dyn_cast<ArrayType>(CurTy))
2529 EltTy = Array->getElementType();
2530 else
2531 EltTy = cast<VectorType>(CurTy)->getElementType();
2532 if (EltTy->isIntegerTy(8)) {
2533 SmallVector<uint8_t, 16> Elts(Record.begin(), Record.end());
2534 if (isa<VectorType>(CurTy))
2535 V = ConstantDataVector::get(Context, Elts);
2536 else
2537 V = ConstantDataArray::get(Context, Elts);
2538 } else if (EltTy->isIntegerTy(16)) {
2539 SmallVector<uint16_t, 16> Elts(Record.begin(), Record.end());
2540 if (isa<VectorType>(CurTy))
2541 V = ConstantDataVector::get(Context, Elts);
2542 else
2543 V = ConstantDataArray::get(Context, Elts);
2544 } else if (EltTy->isIntegerTy(32)) {
2545 SmallVector<uint32_t, 16> Elts(Record.begin(), Record.end());
2546 if (isa<VectorType>(CurTy))
2547 V = ConstantDataVector::get(Context, Elts);
2548 else
2549 V = ConstantDataArray::get(Context, Elts);
2550 } else if (EltTy->isIntegerTy(64)) {
2551 SmallVector<uint64_t, 16> Elts(Record.begin(), Record.end());
2552 if (isa<VectorType>(CurTy))
2553 V = ConstantDataVector::get(Context, Elts);
2554 else
2555 V = ConstantDataArray::get(Context, Elts);
2556 } else if (EltTy->isHalfTy()) {
2557 SmallVector<uint16_t, 16> Elts(Record.begin(), Record.end());
2558 if (isa<VectorType>(CurTy))
2559 V = ConstantDataVector::getFP(EltTy, Elts);
2560 else
2561 V = ConstantDataArray::getFP(EltTy, Elts);
2562 } else if (EltTy->isBFloatTy()) {
2563 SmallVector<uint16_t, 16> Elts(Record.begin(), Record.end());
2564 if (isa<VectorType>(CurTy))
2565 V = ConstantDataVector::getFP(EltTy, Elts);
2566 else
2567 V = ConstantDataArray::getFP(EltTy, Elts);
2568 } else if (EltTy->isFloatTy()) {
2569 SmallVector<uint32_t, 16> Elts(Record.begin(), Record.end());
2570 if (isa<VectorType>(CurTy))
2571 V = ConstantDataVector::getFP(EltTy, Elts);
2572 else
2573 V = ConstantDataArray::getFP(EltTy, Elts);
2574 } else if (EltTy->isDoubleTy()) {
2575 SmallVector<uint64_t, 16> Elts(Record.begin(), Record.end());
2576 if (isa<VectorType>(CurTy))
2577 V = ConstantDataVector::getFP(EltTy, Elts);
2578 else
2579 V = ConstantDataArray::getFP(EltTy, Elts);
2580 } else {
2581 return error("Invalid type for value");
2582 }
2583 break;
2584 }
2585 case bitc::CST_CODE_CE_UNOP: { // CE_UNOP: [opcode, opval]
2586 if (Record.size() < 2)
2587 return error("Invalid record");
2588 int Opc = getDecodedUnaryOpcode(Record[0], CurTy);
2589 if (Opc < 0) {
2590 V = UndefValue::get(CurTy); // Unknown unop.
2591 } else {
2592 Constant *LHS = ValueList.getConstantFwdRef(Record[1], CurTy);
2593 unsigned Flags = 0;
2594 V = ConstantExpr::get(Opc, LHS, Flags);
2595 }
2596 break;
2597 }
2598 case bitc::CST_CODE_CE_BINOP: { // CE_BINOP: [opcode, opval, opval]
2599 if (Record.size() < 3)
2600 return error("Invalid record");
2601 int Opc = getDecodedBinaryOpcode(Record[0], CurTy);
2602 if (Opc < 0) {
2603 V = UndefValue::get(CurTy); // Unknown binop.
2604 } else {
2605 Constant *LHS = ValueList.getConstantFwdRef(Record[1], CurTy);
2606 Constant *RHS = ValueList.getConstantFwdRef(Record[2], CurTy);
2607 unsigned Flags = 0;
2608 if (Record.size() >= 4) {
2609 if (Opc == Instruction::Add ||
2610 Opc == Instruction::Sub ||
2611 Opc == Instruction::Mul ||
2612 Opc == Instruction::Shl) {
2613 if (Record[3] & (1 << bitc::OBO_NO_SIGNED_WRAP))
2614 Flags |= OverflowingBinaryOperator::NoSignedWrap;
2615 if (Record[3] & (1 << bitc::OBO_NO_UNSIGNED_WRAP))
2616 Flags |= OverflowingBinaryOperator::NoUnsignedWrap;
2617 } else if (Opc == Instruction::SDiv ||
2618 Opc == Instruction::UDiv ||
2619 Opc == Instruction::LShr ||
2620 Opc == Instruction::AShr) {
2621 if (Record[3] & (1 << bitc::PEO_EXACT))
2622 Flags |= SDivOperator::IsExact;
2623 }
2624 }
2625 V = ConstantExpr::get(Opc, LHS, RHS, Flags);
2626 }
2627 break;
2628 }
2629 case bitc::CST_CODE_CE_CAST: { // CE_CAST: [opcode, opty, opval]
2630 if (Record.size() < 3)
2631 return error("Invalid record");
2632 int Opc = getDecodedCastOpcode(Record[0]);
2633 if (Opc < 0) {
2634 V = UndefValue::get(CurTy); // Unknown cast.
2635 } else {
2636 Type *OpTy = getTypeByID(Record[1]);
2637 if (!OpTy)
2638 return error("Invalid record");
2639 Constant *Op = ValueList.getConstantFwdRef(Record[2], OpTy);
2640 V = UpgradeBitCastExpr(Opc, Op, CurTy);
2641 if (!V) V = ConstantExpr::getCast(Opc, Op, CurTy);
2642 }
2643 break;
2644 }
2645 case bitc::CST_CODE_CE_INBOUNDS_GEP: // [ty, n x operands]
2646 case bitc::CST_CODE_CE_GEP: // [ty, n x operands]
2647 case bitc::CST_CODE_CE_GEP_WITH_INRANGE_INDEX: { // [ty, flags, n x
2648 // operands]
2649 unsigned OpNum = 0;
2650 Type *PointeeType = nullptr;
2651 if (BitCode == bitc::CST_CODE_CE_GEP_WITH_INRANGE_INDEX ||
2652 Record.size() % 2)
2653 PointeeType = getTypeByID(Record[OpNum++]);
2654
2655 bool InBounds = false;
2656 Optional<unsigned> InRangeIndex;
2657 if (BitCode == bitc::CST_CODE_CE_GEP_WITH_INRANGE_INDEX) {
2658 uint64_t Op = Record[OpNum++];
2659 InBounds = Op & 1;
2660 InRangeIndex = Op >> 1;
2661 } else if (BitCode == bitc::CST_CODE_CE_INBOUNDS_GEP)
2662 InBounds = true;
2663
2664 SmallVector<Constant*, 16> Elts;
2665 Type *Elt0FullTy = nullptr;
2666 while (OpNum != Record.size()) {
2667 if (!Elt0FullTy)
2668 Elt0FullTy = getFullyStructuredTypeByID(Record[OpNum]);
2669 Type *ElTy = getTypeByID(Record[OpNum++]);
2670 if (!ElTy)
2671 return error("Invalid record");
2672 Elts.push_back(ValueList.getConstantFwdRef(Record[OpNum++], ElTy));
2673 }
2674
2675 if (Elts.size() < 1)
2676 return error("Invalid gep with no operands");
2677
2678 Type *ImplicitPointeeType =
2679 getPointerElementFlatType(Elt0FullTy->getScalarType());
2680 if (!PointeeType)
2681 PointeeType = ImplicitPointeeType;
2682 else if (PointeeType != ImplicitPointeeType)
2683 return error("Explicit gep operator type does not match pointee type "
2684 "of pointer operand");
2685
2686 ArrayRef<Constant *> Indices(Elts.begin() + 1, Elts.end());
2687 V = ConstantExpr::getGetElementPtr(PointeeType, Elts[0], Indices,
2688 InBounds, InRangeIndex);
2689 break;
2690 }
2691 case bitc::CST_CODE_CE_SELECT: { // CE_SELECT: [opval#, opval#, opval#]
2692 if (Record.size() < 3)
2693 return error("Invalid record");
2694
2695 Type *SelectorTy = Type::getInt1Ty(Context);
2696
2697 // The selector might be an i1, an <n x i1>, or a <vscale x n x i1>
2698 // Get the type from the ValueList before getting a forward ref.
2699 if (VectorType *VTy = dyn_cast<VectorType>(CurTy))
2700 if (Value *V = ValueList[Record[0]])
2701 if (SelectorTy != V->getType())
2702 SelectorTy = VectorType::get(SelectorTy,
2703 VTy->getElementCount());
2704
2705 V = ConstantExpr::getSelect(ValueList.getConstantFwdRef(Record[0],
2706 SelectorTy),
2707 ValueList.getConstantFwdRef(Record[1],CurTy),
2708 ValueList.getConstantFwdRef(Record[2],CurTy));
2709 break;
2710 }
2711 case bitc::CST_CODE_CE_EXTRACTELT
2712 : { // CE_EXTRACTELT: [opty, opval, opty, opval]
2713 if (Record.size() < 3)
2714 return error("Invalid record");
2715 VectorType *OpTy =
2716 dyn_cast_or_null<VectorType>(getTypeByID(Record[0]));
2717 if (!OpTy)
2718 return error("Invalid record");
2719 Constant *Op0 = ValueList.getConstantFwdRef(Record[1], OpTy);
2720 Constant *Op1 = nullptr;
2721 if (Record.size() == 4) {
2722 Type *IdxTy = getTypeByID(Record[2]);
2723 if (!IdxTy)
2724 return error("Invalid record");
2725 Op1 = ValueList.getConstantFwdRef(Record[3], IdxTy);
2726 } else {
2727 // Deprecated, but still needed to read old bitcode files.
2728 Op1 = ValueList.getConstantFwdRef(Record[2], Type::getInt32Ty(Context));
2729 }
2730 if (!Op1)
2731 return error("Invalid record");
2732 V = ConstantExpr::getExtractElement(Op0, Op1);
2733 break;
2734 }
2735 case bitc::CST_CODE_CE_INSERTELT
2736 : { // CE_INSERTELT: [opval, opval, opty, opval]
2737 VectorType *OpTy = dyn_cast<VectorType>(CurTy);
2738 if (Record.size() < 3 || !OpTy)
2739 return error("Invalid record");
2740 Constant *Op0 = ValueList.getConstantFwdRef(Record[0], OpTy);
2741 Constant *Op1 = ValueList.getConstantFwdRef(Record[1],
2742 OpTy->getElementType());
2743 Constant *Op2 = nullptr;
2744 if (Record.size() == 4) {
2745 Type *IdxTy = getTypeByID(Record[2]);
2746 if (!IdxTy)
2747 return error("Invalid record");
2748 Op2 = ValueList.getConstantFwdRef(Record[3], IdxTy);
2749 } else {
2750 // Deprecated, but still needed to read old bitcode files.
2751 Op2 = ValueList.getConstantFwdRef(Record[2], Type::getInt32Ty(Context));
2752 }
2753 if (!Op2)
2754 return error("Invalid record");
2755 V = ConstantExpr::getInsertElement(Op0, Op1, Op2);
2756 break;
2757 }
2758 case bitc::CST_CODE_CE_SHUFFLEVEC: { // CE_SHUFFLEVEC: [opval, opval, opval]
2759 VectorType *OpTy = dyn_cast<VectorType>(CurTy);
2760 if (Record.size() < 3 || !OpTy)
2761 return error("Invalid record");
2762 DelayedShuffles.push_back(
2763 {OpTy, OpTy, CurFullTy, Record[0], Record[1], Record[2], NextCstNo});
2764 ++NextCstNo;
2765 continue;
2766 }
2767 case bitc::CST_CODE_CE_SHUFVEC_EX: { // [opty, opval, opval, opval]
2768 VectorType *RTy = dyn_cast<VectorType>(CurTy);
2769 VectorType *OpTy =
2770 dyn_cast_or_null<VectorType>(getTypeByID(Record[0]));
2771 if (Record.size() < 4 || !RTy || !OpTy)
2772 return error("Invalid record");
2773 DelayedShuffles.push_back(
2774 {OpTy, RTy, CurFullTy, Record[1], Record[2], Record[3], NextCstNo});
2775 ++NextCstNo;
2776 continue;
2777 }
2778 case bitc::CST_CODE_CE_CMP: { // CE_CMP: [opty, opval, opval, pred]
2779 if (Record.size() < 4)
2780 return error("Invalid record");
2781 Type *OpTy = getTypeByID(Record[0]);
2782 if (!OpTy)
2783 return error("Invalid record");
2784 Constant *Op0 = ValueList.getConstantFwdRef(Record[1], OpTy);
2785 Constant *Op1 = ValueList.getConstantFwdRef(Record[2], OpTy);
2786
2787 if (OpTy->isFPOrFPVectorTy())
2788 V = ConstantExpr::getFCmp(Record[3], Op0, Op1);
2789 else
2790 V = ConstantExpr::getICmp(Record[3], Op0, Op1);
2791 break;
2792 }
2793 // This maintains backward compatibility, pre-asm dialect keywords.
2794 // Deprecated, but still needed to read old bitcode files.
2795 case bitc::CST_CODE_INLINEASM_OLD: {
2796 if (Record.size() < 2)
2797 return error("Invalid record");
2798 std::string AsmStr, ConstrStr;
2799 bool HasSideEffects = Record[0] & 1;
2800 bool IsAlignStack = Record[0] >> 1;
2801 unsigned AsmStrSize = Record[1];
2802 if (2+AsmStrSize >= Record.size())
2803 return error("Invalid record");
2804 unsigned ConstStrSize = Record[2+AsmStrSize];
2805 if (3+AsmStrSize+ConstStrSize > Record.size())
2806 return error("Invalid record");
2807
2808 for (unsigned i = 0; i != AsmStrSize; ++i)
2809 AsmStr += (char)Record[2+i];
2810 for (unsigned i = 0; i != ConstStrSize; ++i)
2811 ConstrStr += (char)Record[3+AsmStrSize+i];
2812 UpgradeInlineAsmString(&AsmStr);
2813 V = InlineAsm::get(
2814 cast<FunctionType>(getPointerElementFlatType(CurFullTy)), AsmStr,
2815 ConstrStr, HasSideEffects, IsAlignStack);
2816 break;
2817 }
2818 // This version adds support for the asm dialect keywords (e.g.,
2819 // inteldialect).
2820 case bitc::CST_CODE_INLINEASM: {
2821 if (Record.size() < 2)
2822 return error("Invalid record");
2823 std::string AsmStr, ConstrStr;
2824 bool HasSideEffects = Record[0] & 1;
2825 bool IsAlignStack = (Record[0] >> 1) & 1;
2826 unsigned AsmDialect = Record[0] >> 2;
2827 unsigned AsmStrSize = Record[1];
2828 if (2+AsmStrSize >= Record.size())
2829 return error("Invalid record");
2830 unsigned ConstStrSize = Record[2+AsmStrSize];
2831 if (3+AsmStrSize+ConstStrSize > Record.size())
2832 return error("Invalid record");
2833
2834 for (unsigned i = 0; i != AsmStrSize; ++i)
2835 AsmStr += (char)Record[2+i];
2836 for (unsigned i = 0; i != ConstStrSize; ++i)
2837 ConstrStr += (char)Record[3+AsmStrSize+i];
2838 UpgradeInlineAsmString(&AsmStr);
2839 V = InlineAsm::get(
2840 cast<FunctionType>(getPointerElementFlatType(CurFullTy)), AsmStr,
2841 ConstrStr, HasSideEffects, IsAlignStack,
2842 InlineAsm::AsmDialect(AsmDialect));
2843 break;
2844 }
2845 case bitc::CST_CODE_BLOCKADDRESS:{
2846 if (Record.size() < 3)
2847 return error("Invalid record");
2848 Type *FnTy = getTypeByID(Record[0]);
2849 if (!FnTy)
2850 return error("Invalid record");
2851 Function *Fn =
2852 dyn_cast_or_null<Function>(ValueList.getConstantFwdRef(Record[1],FnTy));
2853 if (!Fn)
2854 return error("Invalid record");
2855
2856 // If the function is already parsed we can insert the block address right
2857 // away.
2858 BasicBlock *BB;
2859 unsigned BBID = Record[2];
2860 if (!BBID)
2861 // Invalid reference to entry block.
2862 return error("Invalid ID");
2863 if (!Fn->empty()) {
2864 Function::iterator BBI = Fn->begin(), BBE = Fn->end();
2865 for (size_t I = 0, E = BBID; I != E; ++I) {
2866 if (BBI == BBE)
2867 return error("Invalid ID");
2868 ++BBI;
2869 }
2870 BB = &*BBI;
2871 } else {
2872 // Otherwise insert a placeholder and remember it so it can be inserted
2873 // when the function is parsed.
2874 auto &FwdBBs = BasicBlockFwdRefs[Fn];
2875 if (FwdBBs.empty())
2876 BasicBlockFwdRefQueue.push_back(Fn);
2877 if (FwdBBs.size() < BBID + 1)
2878 FwdBBs.resize(BBID + 1);
2879 if (!FwdBBs[BBID])
2880 FwdBBs[BBID] = BasicBlock::Create(Context);
2881 BB = FwdBBs[BBID];
2882 }
2883 V = BlockAddress::get(Fn, BB);
2884 break;
2885 }
2886 }
2887
2888 assert(V->getType() == flattenPointerTypes(CurFullTy) &&((V->getType() == flattenPointerTypes(CurFullTy) &&
"Incorrect fully structured type provided for Constant") ? static_cast
<void> (0) : __assert_fail ("V->getType() == flattenPointerTypes(CurFullTy) && \"Incorrect fully structured type provided for Constant\""
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 2889, __PRETTY_FUNCTION__))
2889 "Incorrect fully structured type provided for Constant")((V->getType() == flattenPointerTypes(CurFullTy) &&
"Incorrect fully structured type provided for Constant") ? static_cast
<void> (0) : __assert_fail ("V->getType() == flattenPointerTypes(CurFullTy) && \"Incorrect fully structured type provided for Constant\""
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 2889, __PRETTY_FUNCTION__))
;
2890 ValueList.assignValue(V, NextCstNo, CurFullTy);
2891 ++NextCstNo;
2892 }
2893}
2894
2895Error BitcodeReader::parseUseLists() {
2896 if (Error Err = Stream.EnterSubBlock(bitc::USELIST_BLOCK_ID))
2897 return Err;
2898
2899 // Read all the records.
2900 SmallVector<uint64_t, 64> Record;
2901
2902 while (true) {
2903 Expected<BitstreamEntry> MaybeEntry = Stream.advanceSkippingSubblocks();
2904 if (!MaybeEntry)
2905 return MaybeEntry.takeError();
2906 BitstreamEntry Entry = MaybeEntry.get();
2907
2908 switch (Entry.Kind) {
2909 case BitstreamEntry::SubBlock: // Handled for us already.
2910 case BitstreamEntry::Error:
2911 return error("Malformed block");
2912 case BitstreamEntry::EndBlock:
2913 return Error::success();
2914 case BitstreamEntry::Record:
2915 // The interesting case.
2916 break;
2917 }
2918
2919 // Read a use list record.
2920 Record.clear();
2921 bool IsBB = false;
2922 Expected<unsigned> MaybeRecord = Stream.readRecord(Entry.ID, Record);
2923 if (!MaybeRecord)
2924 return MaybeRecord.takeError();
2925 switch (MaybeRecord.get()) {
2926 default: // Default behavior: unknown type.
2927 break;
2928 case bitc::USELIST_CODE_BB:
2929 IsBB = true;
2930 LLVM_FALLTHROUGH[[gnu::fallthrough]];
2931 case bitc::USELIST_CODE_DEFAULT: {
2932 unsigned RecordLength = Record.size();
2933 if (RecordLength < 3)
2934 // Records should have at least an ID and two indexes.
2935 return error("Invalid record");
2936 unsigned ID = Record.pop_back_val();
2937
2938 Value *V;
2939 if (IsBB) {
2940 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-12~++20210124100612+2afaf072f5c1/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 2940, __PRETTY_FUNCTION__))
;
2941 V = FunctionBBs[ID];
2942 } else
2943 V = ValueList[ID];
2944 unsigned NumUses = 0;
2945 SmallDenseMap<const Use *, unsigned, 16> Order;
2946 for (const Use &U : V->materialized_uses()) {
2947 if (++NumUses > Record.size())
2948 break;
2949 Order[&U] = Record[NumUses - 1];
2950 }
2951 if (Order.size() != Record.size() || NumUses > Record.size())
2952 // Mismatches can happen if the functions are being materialized lazily
2953 // (out-of-order), or a value has been upgraded.
2954 break;
2955
2956 V->sortUseList([&](const Use &L, const Use &R) {
2957 return Order.lookup(&L) < Order.lookup(&R);
2958 });
2959 break;
2960 }
2961 }
2962 }
2963}
2964
2965/// When we see the block for metadata, remember where it is and then skip it.
2966/// This lets us lazily deserialize the metadata.
2967Error BitcodeReader::rememberAndSkipMetadata() {
2968 // Save the current stream state.
2969 uint64_t CurBit = Stream.GetCurrentBitNo();
2970 DeferredMetadataInfo.push_back(CurBit);
2971
2972 // Skip over the block for now.
2973 if (Error Err = Stream.SkipBlock())
2974 return Err;
2975 return Error::success();
2976}
2977
2978Error BitcodeReader::materializeMetadata() {
2979 for (uint64_t BitPos : DeferredMetadataInfo) {
2980 // Move the bit stream to the saved position.
2981 if (Error JumpFailed = Stream.JumpToBit(BitPos))
2982 return JumpFailed;
2983 if (Error Err = MDLoader->parseModuleMetadata())
2984 return Err;
2985 }
2986
2987 // Upgrade "Linker Options" module flag to "llvm.linker.options" module-level
2988 // metadata. Only upgrade if the new option doesn't exist to avoid upgrade
2989 // multiple times.
2990 if (!TheModule->getNamedMetadata("llvm.linker.options")) {
2991 if (Metadata *Val = TheModule->getModuleFlag("Linker Options")) {
2992 NamedMDNode *LinkerOpts =
2993 TheModule->getOrInsertNamedMetadata("llvm.linker.options");
2994 for (const MDOperand &MDOptions : cast<MDNode>(Val)->operands())
2995 LinkerOpts->addOperand(cast<MDNode>(MDOptions));
2996 }
2997 }
2998
2999 DeferredMetadataInfo.clear();
3000 return Error::success();
3001}
3002
3003void BitcodeReader::setStripDebugInfo() { StripDebugInfo = true; }
3004
3005/// When we see the block for a function body, remember where it is and then
3006/// skip it. This lets us lazily deserialize the functions.
3007Error BitcodeReader::rememberAndSkipFunctionBody() {
3008 // Get the function we are talking about.
3009 if (FunctionsWithBodies.empty())
3010 return error("Insufficient function protos");
3011
3012 Function *Fn = FunctionsWithBodies.back();
3013 FunctionsWithBodies.pop_back();
3014
3015 // Save the current stream state.
3016 uint64_t CurBit = Stream.GetCurrentBitNo();
3017 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-12~++20210124100612+2afaf072f5c1/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 3019, __PRETTY_FUNCTION__))
3018 (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-12~++20210124100612+2afaf072f5c1/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 3019, __PRETTY_FUNCTION__))
3019 "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-12~++20210124100612+2afaf072f5c1/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 3019, __PRETTY_FUNCTION__))
;
3020 DeferredFunctionInfo[Fn] = CurBit;
3021
3022 // Skip over the function block for now.
3023 if (Error Err = Stream.SkipBlock())
3024 return Err;
3025 return Error::success();
3026}
3027
3028Error BitcodeReader::globalCleanup() {
3029 // Patch the initializers for globals and aliases up.
3030 if (Error Err = resolveGlobalAndIndirectSymbolInits())
3031 return Err;
3032 if (!GlobalInits.empty() || !IndirectSymbolInits.empty())
3033 return error("Malformed global initializer set");
3034
3035 // Look for intrinsic functions which need to be upgraded at some point
3036 // and functions that need to have their function attributes upgraded.
3037 for (Function &F : *TheModule) {
3038 MDLoader->upgradeDebugIntrinsics(F);
3039 Function *NewFn;
3040 if (UpgradeIntrinsicFunction(&F, NewFn))
3041 UpgradedIntrinsics[&F] = NewFn;
3042 else if (auto Remangled = Intrinsic::remangleIntrinsicFunction(&F))
3043 // Some types could be renamed during loading if several modules are
3044 // loaded in the same LLVMContext (LTO scenario). In this case we should
3045 // remangle intrinsics names as well.
3046 RemangledIntrinsics[&F] = Remangled.getValue();
3047 // Look for functions that rely on old function attribute behavior.
3048 UpgradeFunctionAttributes(F);
3049 }
3050
3051 // Look for global variables which need to be renamed.
3052 std::vector<std::pair<GlobalVariable *, GlobalVariable *>> UpgradedVariables;
3053 for (GlobalVariable &GV : TheModule->globals())
3054 if (GlobalVariable *Upgraded = UpgradeGlobalVariable(&GV))
3055 UpgradedVariables.emplace_back(&GV, Upgraded);
3056 for (auto &Pair : UpgradedVariables) {
3057 Pair.first->eraseFromParent();
3058 TheModule->getGlobalList().push_back(Pair.second);
3059 }
3060
3061 // Force deallocation of memory for these vectors to favor the client that
3062 // want lazy deserialization.
3063 std::vector<std::pair<GlobalVariable *, unsigned>>().swap(GlobalInits);
3064 std::vector<std::pair<GlobalIndirectSymbol *, unsigned>>().swap(
3065 IndirectSymbolInits);
3066 return Error::success();
3067}
3068
3069/// Support for lazy parsing of function bodies. This is required if we
3070/// either have an old bitcode file without a VST forward declaration record,
3071/// or if we have an anonymous function being materialized, since anonymous
3072/// functions do not have a name and are therefore not in the VST.
3073Error BitcodeReader::rememberAndSkipFunctionBodies() {
3074 if (Error JumpFailed = Stream.JumpToBit(NextUnreadBit))
3075 return JumpFailed;
3076
3077 if (Stream.AtEndOfStream())
3078 return error("Could not find function in stream");
3079
3080 if (!SeenFirstFunctionBody)
3081 return error("Trying to materialize functions before seeing function blocks");
3082
3083 // An old bitcode file with the symbol table at the end would have
3084 // finished the parse greedily.
3085 assert(SeenValueSymbolTable)((SeenValueSymbolTable) ? static_cast<void> (0) : __assert_fail
("SeenValueSymbolTable", "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 3085, __PRETTY_FUNCTION__))
;
3086
3087 SmallVector<uint64_t, 64> Record;
3088
3089 while (true) {
3090 Expected<llvm::BitstreamEntry> MaybeEntry = Stream.advance();
3091 if (!MaybeEntry)
3092 return MaybeEntry.takeError();
3093 llvm::BitstreamEntry Entry = MaybeEntry.get();
3094
3095 switch (Entry.Kind) {
3096 default:
3097 return error("Expect SubBlock");
3098 case BitstreamEntry::SubBlock:
3099 switch (Entry.ID) {
3100 default:
3101 return error("Expect function block");
3102 case bitc::FUNCTION_BLOCK_ID:
3103 if (Error Err = rememberAndSkipFunctionBody())
3104 return Err;
3105 NextUnreadBit = Stream.GetCurrentBitNo();
3106 return Error::success();
3107 }
3108 }
3109 }
3110}
3111
3112bool BitcodeReaderBase::readBlockInfo() {
3113 Expected<Optional<BitstreamBlockInfo>> MaybeNewBlockInfo =
3114 Stream.ReadBlockInfoBlock();
3115 if (!MaybeNewBlockInfo)
3116 return true; // FIXME Handle the error.
3117 Optional<BitstreamBlockInfo> NewBlockInfo =
3118 std::move(MaybeNewBlockInfo.get());
3119 if (!NewBlockInfo)
3120 return true;
3121 BlockInfo = std::move(*NewBlockInfo);
3122 return false;
3123}
3124
3125Error BitcodeReader::parseComdatRecord(ArrayRef<uint64_t> Record) {
3126 // v1: [selection_kind, name]
3127 // v2: [strtab_offset, strtab_size, selection_kind]
3128 StringRef Name;
3129 std::tie(Name, Record) = readNameFromStrtab(Record);
3130
3131 if (Record.empty())
3132 return error("Invalid record");
3133 Comdat::SelectionKind SK = getDecodedComdatSelectionKind(Record[0]);
3134 std::string OldFormatName;
3135 if (!UseStrtab) {
3136 if (Record.size() < 2)
3137 return error("Invalid record");
3138 unsigned ComdatNameSize = Record[1];
3139 OldFormatName.reserve(ComdatNameSize);
3140 for (unsigned i = 0; i != ComdatNameSize; ++i)
3141 OldFormatName += (char)Record[2 + i];
3142 Name = OldFormatName;
3143 }
3144 Comdat *C = TheModule->getOrInsertComdat(Name);
3145 C->setSelectionKind(SK);
3146 ComdatList.push_back(C);
3147 return Error::success();
3148}
3149
3150static void inferDSOLocal(GlobalValue *GV) {
3151 // infer dso_local from linkage and visibility if it is not encoded.
3152 if (GV->hasLocalLinkage() ||
3153 (!GV->hasDefaultVisibility() && !GV->hasExternalWeakLinkage()))
3154 GV->setDSOLocal(true);
3155}
3156
3157Error BitcodeReader::parseGlobalVarRecord(ArrayRef<uint64_t> Record) {
3158 // v1: [pointer type, isconst, initid, linkage, alignment, section,
3159 // visibility, threadlocal, unnamed_addr, externally_initialized,
3160 // dllstorageclass, comdat, attributes, preemption specifier,
3161 // partition strtab offset, partition strtab size] (name in VST)
3162 // v2: [strtab_offset, strtab_size, v1]
3163 StringRef Name;
3164 std::tie(Name, Record) = readNameFromStrtab(Record);
3165
3166 if (Record.size() < 6)
3167 return error("Invalid record");
3168 Type *FullTy = getFullyStructuredTypeByID(Record[0]);
3169 Type *Ty = flattenPointerTypes(FullTy);
3170 if (!Ty)
3171 return error("Invalid record");
3172 bool isConstant = Record[1] & 1;
3173 bool explicitType = Record[1] & 2;
3174 unsigned AddressSpace;
3175 if (explicitType) {
3176 AddressSpace = Record[1] >> 2;
3177 } else {
3178 if (!Ty->isPointerTy())
3179 return error("Invalid type for value");
3180 AddressSpace = cast<PointerType>(Ty)->getAddressSpace();
3181 std::tie(FullTy, Ty) = getPointerElementTypes(FullTy);
3182 }
3183
3184 uint64_t RawLinkage = Record[3];
3185 GlobalValue::LinkageTypes Linkage = getDecodedLinkage(RawLinkage);
3186 MaybeAlign Alignment;
3187 if (Error Err = parseAlignmentValue(Record[4], Alignment))
3188 return Err;
3189 std::string Section;
3190 if (Record[5]) {
3191 if (Record[5] - 1 >= SectionTable.size())
3192 return error("Invalid ID");
3193 Section = SectionTable[Record[5] - 1];
3194 }
3195 GlobalValue::VisibilityTypes Visibility = GlobalValue::DefaultVisibility;
3196 // Local linkage must have default visibility.
3197 // auto-upgrade `hidden` and `protected` for old bitcode.
3198 if (Record.size() > 6 && !GlobalValue::isLocalLinkage(Linkage))
3199 Visibility = getDecodedVisibility(Record[6]);
3200
3201 GlobalVariable::ThreadLocalMode TLM = GlobalVariable::NotThreadLocal;
3202 if (Record.size() > 7)
3203 TLM = getDecodedThreadLocalMode(Record[7]);
3204
3205 GlobalValue::UnnamedAddr UnnamedAddr = GlobalValue::UnnamedAddr::None;
3206 if (Record.size() > 8)
3207 UnnamedAddr = getDecodedUnnamedAddrType(Record[8]);
3208
3209 bool ExternallyInitialized = false;
3210 if (Record.size() > 9)
3211 ExternallyInitialized = Record[9];
3212
3213 GlobalVariable *NewGV =
3214 new GlobalVariable(*TheModule, Ty, isConstant, Linkage, nullptr, Name,
3215 nullptr, TLM, AddressSpace, ExternallyInitialized);
3216 NewGV->setAlignment(Alignment);
3217 if (!Section.empty())
3218 NewGV->setSection(Section);
3219 NewGV->setVisibility(Visibility);
3220 NewGV->setUnnamedAddr(UnnamedAddr);
3221
3222 if (Record.size() > 10)
3223 NewGV->setDLLStorageClass(getDecodedDLLStorageClass(Record[10]));
3224 else
3225 upgradeDLLImportExportLinkage(NewGV, RawLinkage);
3226
3227 FullTy = PointerType::get(FullTy, AddressSpace);
3228 assert(NewGV->getType() == flattenPointerTypes(FullTy) &&((NewGV->getType() == flattenPointerTypes(FullTy) &&
"Incorrect fully specified type for GlobalVariable") ? static_cast
<void> (0) : __assert_fail ("NewGV->getType() == flattenPointerTypes(FullTy) && \"Incorrect fully specified type for GlobalVariable\""
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 3229, __PRETTY_FUNCTION__))
3229 "Incorrect fully specified type for GlobalVariable")((NewGV->getType() == flattenPointerTypes(FullTy) &&
"Incorrect fully specified type for GlobalVariable") ? static_cast
<void> (0) : __assert_fail ("NewGV->getType() == flattenPointerTypes(FullTy) && \"Incorrect fully specified type for GlobalVariable\""
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 3229, __PRETTY_FUNCTION__))
;
3230 ValueList.push_back(NewGV, FullTy);
3231
3232 // Remember which value to use for the global initializer.
3233 if (unsigned InitID = Record[2])
3234 GlobalInits.push_back(std::make_pair(NewGV, InitID - 1));
3235
3236 if (Record.size() > 11) {
3237 if (unsigned ComdatID = Record[11]) {
3238 if (ComdatID > ComdatList.size())
3239 return error("Invalid global variable comdat ID");
3240 NewGV->setComdat(ComdatList[ComdatID - 1]);
3241 }
3242 } else if (hasImplicitComdat(RawLinkage)) {
3243 NewGV->setComdat(reinterpret_cast<Comdat *>(1));
3244 }
3245
3246 if (Record.size() > 12) {
3247 auto AS = getAttributes(Record[12]).getFnAttributes();
3248 NewGV->setAttributes(AS);
3249 }
3250
3251 if (Record.size() > 13) {
3252 NewGV->setDSOLocal(getDecodedDSOLocal(Record[13]));
3253 }
3254 inferDSOLocal(NewGV);
3255
3256 // Check whether we have enough values to read a partition name.
3257 if (Record.size() > 15)
3258 NewGV->setPartition(StringRef(Strtab.data() + Record[14], Record[15]));
3259
3260 return Error::success();
3261}
3262
3263Error BitcodeReader::parseFunctionRecord(ArrayRef<uint64_t> Record) {
3264 // v1: [type, callingconv, isproto, linkage, paramattr, alignment, section,
3265 // visibility, gc, unnamed_addr, prologuedata, dllstorageclass, comdat,
3266 // prefixdata, personalityfn, preemption specifier, addrspace] (name in VST)
3267 // v2: [strtab_offset, strtab_size, v1]
3268 StringRef Name;
3269 std::tie(Name, Record) = readNameFromStrtab(Record);
3270
3271 if (Record.size() < 8)
3272 return error("Invalid record");
3273 Type *FullFTy = getFullyStructuredTypeByID(Record[0]);
3274 Type *FTy = flattenPointerTypes(FullFTy);
3275 if (!FTy)
3276 return error("Invalid record");
3277 if (isa<PointerType>(FTy))
3278 std::tie(FullFTy, FTy) = getPointerElementTypes(FullFTy);
3279
3280 if (!isa<FunctionType>(FTy))
3281 return error("Invalid type for value");
3282 auto CC = static_cast<CallingConv::ID>(Record[1]);
3283 if (CC & ~CallingConv::MaxID)
3284 return error("Invalid calling convention ID");
3285
3286 unsigned AddrSpace = TheModule->getDataLayout().getProgramAddressSpace();
3287 if (Record.size() > 16)
3288 AddrSpace = Record[16];
3289
3290 Function *Func =
3291 Function::Create(cast<FunctionType>(FTy), GlobalValue::ExternalLinkage,
3292 AddrSpace, Name, TheModule);
3293
3294 assert(Func->getFunctionType() == flattenPointerTypes(FullFTy) &&((Func->getFunctionType() == flattenPointerTypes(FullFTy) &&
"Incorrect fully specified type provided for function") ? static_cast
<void> (0) : __assert_fail ("Func->getFunctionType() == flattenPointerTypes(FullFTy) && \"Incorrect fully specified type provided for function\""
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 3295, __PRETTY_FUNCTION__))
3295 "Incorrect fully specified type provided for function")((Func->getFunctionType() == flattenPointerTypes(FullFTy) &&
"Incorrect fully specified type provided for function") ? static_cast
<void> (0) : __assert_fail ("Func->getFunctionType() == flattenPointerTypes(FullFTy) && \"Incorrect fully specified type provided for function\""
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 3295, __PRETTY_FUNCTION__))
;
3296 FunctionTypes[Func] = cast<FunctionType>(FullFTy);
3297
3298 Func->setCallingConv(CC);
3299 bool isProto = Record[2];
3300 uint64_t RawLinkage = Record[3];
3301 Func->setLinkage(getDecodedLinkage(RawLinkage));
3302 Func->setAttributes(getAttributes(Record[4]));
3303
3304 // Upgrade any old-style byval or sret without a type by propagating the
3305 // argument's pointee type. There should be no opaque pointers where the byval
3306 // type is implicit.
3307 for (unsigned i = 0; i != Func->arg_size(); ++i) {
3308 for (Attribute::AttrKind Kind : {Attribute::ByVal, Attribute::StructRet}) {
3309 if (!Func->hasParamAttribute(i, Kind))
3310 continue;
3311
3312 Func->removeParamAttr(i, Kind);
3313
3314 Type *PTy = cast<FunctionType>(FullFTy)->getParamType(i);
3315 Type *PtrEltTy = getPointerElementFlatType(PTy);
3316 Attribute NewAttr =
3317 Kind == Attribute::ByVal
3318 ? Attribute::getWithByValType(Context, PtrEltTy)
3319 : Attribute::getWithStructRetType(Context, PtrEltTy);
3320 Func->addParamAttr(i, NewAttr);
3321 }
3322 }
3323
3324 MaybeAlign Alignment;
3325 if (Error Err = parseAlignmentValue(Record[5], Alignment))
3326 return Err;
3327 Func->setAlignment(Alignment);
3328 if (Record[6]) {
3329 if (Record[6] - 1 >= SectionTable.size())
3330 return error("Invalid ID");
3331 Func->setSection(SectionTable[Record[6] - 1]);
3332 }
3333 // Local linkage must have default visibility.
3334 // auto-upgrade `hidden` and `protected` for old bitcode.
3335 if (!Func->hasLocalLinkage())
3336 Func->setVisibility(getDecodedVisibility(Record[7]));
3337 if (Record.size() > 8 && Record[8]) {
3338 if (Record[8] - 1 >= GCTable.size())
3339 return error("Invalid ID");
3340 Func->setGC(GCTable[Record[8] - 1]);
3341 }
3342 GlobalValue::UnnamedAddr UnnamedAddr = GlobalValue::UnnamedAddr::None;
3343 if (Record.size() > 9)
3344 UnnamedAddr = getDecodedUnnamedAddrType(Record[9]);
3345 Func->setUnnamedAddr(UnnamedAddr);
3346 if (Record.size() > 10 && Record[10] != 0)
3347 FunctionPrologues.push_back(std::make_pair(Func, Record[10] - 1));
3348
3349 if (Record.size() > 11)
3350 Func->setDLLStorageClass(getDecodedDLLStorageClass(Record[11]));
3351 else
3352 upgradeDLLImportExportLinkage(Func, RawLinkage);
3353
3354 if (Record.size() > 12) {
3355 if (unsigned ComdatID = Record[12]) {
3356 if (ComdatID > ComdatList.size())
3357 return error("Invalid function comdat ID");
3358 Func->setComdat(ComdatList[ComdatID - 1]);
3359 }
3360 } else if (hasImplicitComdat(RawLinkage)) {
3361 Func->setComdat(reinterpret_cast<Comdat *>(1));
3362 }
3363
3364 if (Record.size() > 13 && Record[13] != 0)
3365 FunctionPrefixes.push_back(std::make_pair(Func, Record[13] - 1));
3366
3367 if (Record.size() > 14 && Record[14] != 0)
3368 FunctionPersonalityFns.push_back(std::make_pair(Func, Record[14] - 1));
3369
3370 if (Record.size() > 15) {
3371 Func->setDSOLocal(getDecodedDSOLocal(Record[15]));
3372 }
3373 inferDSOLocal(Func);
3374
3375 // Record[16] is the address space number.
3376
3377 // Check whether we have enough values to read a partition name.
3378 if (Record.size() > 18)
3379 Func->setPartition(StringRef(Strtab.data() + Record[17], Record[18]));
3380
3381 Type *FullTy = PointerType::get(FullFTy, AddrSpace);
3382 assert(Func->getType() == flattenPointerTypes(FullTy) &&((Func->getType() == flattenPointerTypes(FullTy) &&
"Incorrect fully specified type provided for Function") ? static_cast
<void> (0) : __assert_fail ("Func->getType() == flattenPointerTypes(FullTy) && \"Incorrect fully specified type provided for Function\""
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 3383, __PRETTY_FUNCTION__))
3383 "Incorrect fully specified type provided for Function")((Func->getType() == flattenPointerTypes(FullTy) &&
"Incorrect fully specified type provided for Function") ? static_cast
<void> (0) : __assert_fail ("Func->getType() == flattenPointerTypes(FullTy) && \"Incorrect fully specified type provided for Function\""
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 3383, __PRETTY_FUNCTION__))
;
3384 ValueList.push_back(Func, FullTy);
3385
3386 // If this is a function with a body, remember the prototype we are
3387 // creating now, so that we can match up the body with them later.
3388 if (!isProto) {
3389 Func->setIsMaterializable(true);
3390 FunctionsWithBodies.push_back(Func);
3391 DeferredFunctionInfo[Func] = 0;
3392 }
3393 return Error::success();
3394}
3395
3396Error BitcodeReader::parseGlobalIndirectSymbolRecord(
3397 unsigned BitCode, ArrayRef<uint64_t> Record) {
3398 // v1 ALIAS_OLD: [alias type, aliasee val#, linkage] (name in VST)
3399 // v1 ALIAS: [alias type, addrspace, aliasee val#, linkage, visibility,
3400 // dllstorageclass, threadlocal, unnamed_addr,
3401 // preemption specifier] (name in VST)
3402 // v1 IFUNC: [alias type, addrspace, aliasee val#, linkage,
3403 // visibility, dllstorageclass, threadlocal, unnamed_addr,
3404 // preemption specifier] (name in VST)
3405 // v2: [strtab_offset, strtab_size, v1]
3406 StringRef Name;
3407 std::tie(Name, Record) = readNameFromStrtab(Record);
3408
3409 bool NewRecord = BitCode != bitc::MODULE_CODE_ALIAS_OLD;
3410 if (Record.size() < (3 + (unsigned)NewRecord))
3411 return error("Invalid record");
3412 unsigned OpNum = 0;
3413 Type *FullTy = getFullyStructuredTypeByID(Record[OpNum++]);
3414 Type *Ty = flattenPointerTypes(FullTy);
3415 if (!Ty)
3416 return error("Invalid record");
3417
3418 unsigned AddrSpace;
3419 if (!NewRecord) {
3420 auto *PTy = dyn_cast<PointerType>(Ty);
3421 if (!PTy)
3422 return error("Invalid type for value");
3423 std::tie(FullTy, Ty) = getPointerElementTypes(FullTy);
3424 AddrSpace = PTy->getAddressSpace();
3425 } else {
3426 AddrSpace = Record[OpNum++];
3427 }
3428
3429 auto Val = Record[OpNum++];
3430 auto Linkage = Record[OpNum++];
3431 GlobalIndirectSymbol *NewGA;
3432 if (BitCode == bitc::MODULE_CODE_ALIAS ||
3433 BitCode == bitc::MODULE_CODE_ALIAS_OLD)
3434 NewGA = GlobalAlias::create(Ty, AddrSpace, getDecodedLinkage(Linkage), Name,
3435 TheModule);
3436 else
3437 NewGA = GlobalIFunc::create(Ty, AddrSpace, getDecodedLinkage(Linkage), Name,
3438 nullptr, TheModule);
3439
3440 assert(NewGA->getValueType() == flattenPointerTypes(FullTy) &&((NewGA->getValueType() == flattenPointerTypes(FullTy) &&
"Incorrect fully structured type provided for GlobalIndirectSymbol"
) ? static_cast<void> (0) : __assert_fail ("NewGA->getValueType() == flattenPointerTypes(FullTy) && \"Incorrect fully structured type provided for GlobalIndirectSymbol\""
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 3441, __PRETTY_FUNCTION__))
3441 "Incorrect fully structured type provided for GlobalIndirectSymbol")((NewGA->getValueType() == flattenPointerTypes(FullTy) &&
"Incorrect fully structured type provided for GlobalIndirectSymbol"
) ? static_cast<void> (0) : __assert_fail ("NewGA->getValueType() == flattenPointerTypes(FullTy) && \"Incorrect fully structured type provided for GlobalIndirectSymbol\""
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 3441, __PRETTY_FUNCTION__))
;
3442 // Local linkage must have default visibility.
3443 // auto-upgrade `hidden` and `protected` for old bitcode.
3444 if (OpNum != Record.size()) {
3445 auto VisInd = OpNum++;
3446 if (!NewGA->hasLocalLinkage())
3447 NewGA->setVisibility(getDecodedVisibility(Record[VisInd]));
3448 }
3449 if (BitCode == bitc::MODULE_CODE_ALIAS ||
3450 BitCode == bitc::MODULE_CODE_ALIAS_OLD) {
3451 if (OpNum != Record.size())
3452 NewGA->setDLLStorageClass(getDecodedDLLStorageClass(Record[OpNum++]));
3453 else
3454 upgradeDLLImportExportLinkage(NewGA, Linkage);
3455 if (OpNum != Record.size())
3456 NewGA->setThreadLocalMode(getDecodedThreadLocalMode(Record[OpNum++]));
3457 if (OpNum != Record.size())
3458 NewGA->setUnnamedAddr(getDecodedUnnamedAddrType(Record[OpNum++]));
3459 }
3460 if (OpNum != Record.size())
3461 NewGA->setDSOLocal(getDecodedDSOLocal(Record[OpNum++]));
3462 inferDSOLocal(NewGA);
3463
3464 // Check whether we have enough values to read a partition name.
3465 if (OpNum + 1 < Record.size()) {
3466 NewGA->setPartition(
3467 StringRef(Strtab.data() + Record[OpNum], Record[OpNum + 1]));
3468 OpNum += 2;
Value stored to 'OpNum' is never read
3469 }
3470
3471 FullTy = PointerType::get(FullTy, AddrSpace);
3472 assert(NewGA->getType() == flattenPointerTypes(FullTy) &&((NewGA->getType() == flattenPointerTypes(FullTy) &&
"Incorrect fully structured type provided for GlobalIndirectSymbol"
) ? static_cast<void> (0) : __assert_fail ("NewGA->getType() == flattenPointerTypes(FullTy) && \"Incorrect fully structured type provided for GlobalIndirectSymbol\""
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 3473, __PRETTY_FUNCTION__))
3473 "Incorrect fully structured type provided for GlobalIndirectSymbol")((NewGA->getType() == flattenPointerTypes(FullTy) &&
"Incorrect fully structured type provided for GlobalIndirectSymbol"
) ? static_cast<void> (0) : __assert_fail ("NewGA->getType() == flattenPointerTypes(FullTy) && \"Incorrect fully structured type provided for GlobalIndirectSymbol\""
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 3473, __PRETTY_FUNCTION__))
;
3474 ValueList.push_back(NewGA, FullTy);
3475 IndirectSymbolInits.push_back(std::make_pair(NewGA, Val));
3476 return Error::success();
3477}
3478
3479Error BitcodeReader::parseModule(uint64_t ResumeBit,
3480 bool ShouldLazyLoadMetadata,
3481 DataLayoutCallbackTy DataLayoutCallback) {
3482 if (ResumeBit) {
3483 if (Error JumpFailed = Stream.JumpToBit(ResumeBit))
3484 return JumpFailed;
3485 } else if (Error Err = Stream.EnterSubBlock(bitc::MODULE_BLOCK_ID))
3486 return Err;
3487
3488 SmallVector<uint64_t, 64> Record;
3489
3490 // Parts of bitcode parsing depend on the datalayout. Make sure we
3491 // finalize the datalayout before we run any of that code.
3492 bool ResolvedDataLayout = false;
3493 auto ResolveDataLayout = [&] {
3494 if (ResolvedDataLayout)
3495 return;
3496
3497 // datalayout and triple can't be parsed after this point.
3498 ResolvedDataLayout = true;
3499
3500 // Upgrade data layout string.
3501 std::string DL = llvm::UpgradeDataLayoutString(
3502 TheModule->getDataLayoutStr(), TheModule->getTargetTriple());
3503 TheModule->setDataLayout(DL);
3504
3505 if (auto LayoutOverride =
3506 DataLayoutCallback(TheModule->getTargetTriple()))
3507 TheModule->setDataLayout(*LayoutOverride);
3508 };
3509
3510 // Read all the records for this module.
3511 while (true) {
3512 Expected<llvm::BitstreamEntry> MaybeEntry = Stream.advance();
3513 if (!MaybeEntry)
3514 return MaybeEntry.takeError();
3515 llvm::BitstreamEntry Entry = MaybeEntry.get();
3516
3517 switch (Entry.Kind) {
3518 case BitstreamEntry::Error:
3519 return error("Malformed block");
3520 case BitstreamEntry::EndBlock:
3521 ResolveDataLayout();
3522 return globalCleanup();
3523
3524 case BitstreamEntry::SubBlock:
3525 switch (Entry.ID) {
3526 default: // Skip unknown content.
3527 if (Error Err = Stream.SkipBlock())
3528 return Err;
3529 break;
3530 case bitc::BLOCKINFO_BLOCK_ID:
3531 if (readBlockInfo())
3532 return error("Malformed block");
3533 break;
3534 case bitc::PARAMATTR_BLOCK_ID:
3535 if (Error Err = parseAttributeBlock())
3536 return Err;
3537 break;
3538 case bitc::PARAMATTR_GROUP_BLOCK_ID:
3539 if (Error Err = parseAttributeGroupBlock())
3540 return Err;
3541 break;
3542 case bitc::TYPE_BLOCK_ID_NEW:
3543 if (Error Err = parseTypeTable())
3544 return Err;
3545 break;
3546 case bitc::VALUE_SYMTAB_BLOCK_ID:
3547 if (!SeenValueSymbolTable) {
3548 // Either this is an old form VST without function index and an
3549 // associated VST forward declaration record (which would have caused
3550 // the VST to be jumped to and parsed before it was encountered
3551 // normally in the stream), or there were no function blocks to
3552 // trigger an earlier parsing of the VST.
3553 assert(VSTOffset == 0 || FunctionsWithBodies.empty())((VSTOffset == 0 || FunctionsWithBodies.empty()) ? static_cast
<void> (0) : __assert_fail ("VSTOffset == 0 || FunctionsWithBodies.empty()"
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 3553, __PRETTY_FUNCTION__))
;
3554 if (Error Err = parseValueSymbolTable())
3555 return Err;
3556 SeenValueSymbolTable = true;
3557 } else {
3558 // We must have had a VST forward declaration record, which caused
3559 // the parser to jump to and parse the VST earlier.
3560 assert(VSTOffset > 0)((VSTOffset > 0) ? static_cast<void> (0) : __assert_fail
("VSTOffset > 0", "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 3560, __PRETTY_FUNCTION__))
;
3561 if (Error Err = Stream.SkipBlock())
3562 return Err;
3563 }
3564 break;
3565 case bitc::CONSTANTS_BLOCK_ID:
3566 if (Error Err = parseConstants())
3567 return Err;
3568 if (Error Err = resolveGlobalAndIndirectSymbolInits())
3569 return Err;
3570 break;
3571 case bitc::METADATA_BLOCK_ID:
3572 if (ShouldLazyLoadMetadata) {
3573 if (Error Err = rememberAndSkipMetadata())
3574 return Err;
3575 break;
3576 }
3577 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-12~++20210124100612+2afaf072f5c1/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 3577, __PRETTY_FUNCTION__))
;
3578 if (Error Err = MDLoader->parseModuleMetadata())
3579 return Err;
3580 break;
3581 case bitc::METADATA_KIND_BLOCK_ID:
3582 if (Error Err = MDLoader->parseMetadataKinds())
3583 return Err;
3584 break;
3585 case bitc::FUNCTION_BLOCK_ID:
3586 ResolveDataLayout();
3587
3588 // If this is the first function body we've seen, reverse the
3589 // FunctionsWithBodies list.
3590 if (!SeenFirstFunctionBody) {
3591 std::reverse(FunctionsWithBodies.begin(), FunctionsWithBodies.end());
3592 if (Error Err = globalCleanup())
3593 return Err;
3594 SeenFirstFunctionBody = true;
3595 }
3596
3597 if (VSTOffset > 0) {
3598 // If we have a VST forward declaration record, make sure we
3599 // parse the VST now if we haven't already. It is needed to
3600 // set up the DeferredFunctionInfo vector for lazy reading.
3601 if (!SeenValueSymbolTable) {
3602 if (Error Err = BitcodeReader::parseValueSymbolTable(VSTOffset))
3603 return Err;
3604 SeenValueSymbolTable = true;
3605 // Fall through so that we record the NextUnreadBit below.
3606 // This is necessary in case we have an anonymous function that
3607 // is later materialized. Since it will not have a VST entry we
3608 // need to fall back to the lazy parse to find its offset.
3609 } else {
3610 // If we have a VST forward declaration record, but have already
3611 // parsed the VST (just above, when the first function body was
3612 // encountered here), then we are resuming the parse after
3613 // materializing functions. The ResumeBit points to the
3614 // start of the last function block recorded in the
3615 // DeferredFunctionInfo map. Skip it.
3616 if (Error Err = Stream.SkipBlock())
3617 return Err;
3618 continue;
3619 }
3620 }
3621
3622 // Support older bitcode files that did not have the function
3623 // index in the VST, nor a VST forward declaration record, as
3624 // well as anonymous functions that do not have VST entries.
3625 // Build the DeferredFunctionInfo vector on the fly.
3626 if (Error Err = rememberAndSkipFunctionBody())
3627 return Err;
3628
3629 // Suspend parsing when we reach the function bodies. Subsequent
3630 // materialization calls will resume it when necessary. If the bitcode
3631 // file is old, the symbol table will be at the end instead and will not
3632 // have been seen yet. In this case, just finish the parse now.
3633 if (SeenValueSymbolTable) {
3634 NextUnreadBit = Stream.GetCurrentBitNo();
3635 // After the VST has been parsed, we need to make sure intrinsic name
3636 // are auto-upgraded.
3637 return globalCleanup();
3638 }
3639 break;
3640 case bitc::USELIST_BLOCK_ID:
3641 if (Error Err = parseUseLists())
3642 return Err;
3643 break;
3644 case bitc::OPERAND_BUNDLE_TAGS_BLOCK_ID:
3645 if (Error Err = parseOperandBundleTags())
3646 return Err;
3647 break;
3648 case bitc::SYNC_SCOPE_NAMES_BLOCK_ID:
3649 if (Error Err = parseSyncScopeNames())
3650 return Err;
3651 break;
3652 }
3653 continue;
3654
3655 case BitstreamEntry::Record:
3656 // The interesting case.
3657 break;
3658 }
3659
3660 // Read a record.
3661 Expected<unsigned> MaybeBitCode = Stream.readRecord(Entry.ID, Record);
3662 if (!MaybeBitCode)
3663 return MaybeBitCode.takeError();
3664 switch (unsigned BitCode = MaybeBitCode.get()) {
3665 default: break; // Default behavior, ignore unknown content.
3666 case bitc::MODULE_CODE_VERSION: {
3667 Expected<unsigned> VersionOrErr = parseVersionRecord(Record);
3668 if (!VersionOrErr)
3669 return VersionOrErr.takeError();
3670 UseRelativeIDs = *VersionOrErr >= 1;
3671 break;
3672 }
3673 case bitc::MODULE_CODE_TRIPLE: { // TRIPLE: [strchr x N]
3674 if (ResolvedDataLayout)
3675 return error("target triple too late in module");
3676 std::string S;
3677 if (convertToString(Record, 0, S))
3678 return error("Invalid record");
3679 TheModule->setTargetTriple(S);
3680 break;
3681 }
3682 case bitc::MODULE_CODE_DATALAYOUT: { // DATALAYOUT: [strchr x N]
3683 if (ResolvedDataLayout)
3684 return error("datalayout too late in module");
3685 std::string S;
3686 if (convertToString(Record, 0, S))
3687 return error("Invalid record");
3688 TheModule->setDataLayout(S);
3689 break;
3690 }
3691 case bitc::MODULE_CODE_ASM: { // ASM: [strchr x N]
3692 std::string S;
3693 if (convertToString(Record, 0, S))
3694 return error("Invalid record");
3695 TheModule->setModuleInlineAsm(S);
3696 break;
3697 }
3698 case bitc::MODULE_CODE_DEPLIB: { // DEPLIB: [strchr x N]
3699 // Deprecated, but still needed to read old bitcode files.
3700 std::string S;
3701 if (convertToString(Record, 0, S))
3702 return error("Invalid record");
3703 // Ignore value.
3704 break;
3705 }
3706 case bitc::MODULE_CODE_SECTIONNAME: { // SECTIONNAME: [strchr x N]
3707 std::string S;
3708 if (convertToString(Record, 0, S))
3709 return error("Invalid record");
3710 SectionTable.push_back(S);
3711 break;
3712 }
3713 case bitc::MODULE_CODE_GCNAME: { // SECTIONNAME: [strchr x N]
3714 std::string S;
3715 if (convertToString(Record, 0, S))
3716 return error("Invalid record");
3717 GCTable.push_back(S);
3718 break;
3719 }
3720 case bitc::MODULE_CODE_COMDAT:
3721 if (Error Err = parseComdatRecord(Record))
3722 return Err;
3723 break;
3724 case bitc::MODULE_CODE_GLOBALVAR:
3725 if (Error Err = parseGlobalVarRecord(Record))
3726 return Err;
3727 break;
3728 case bitc::MODULE_CODE_FUNCTION:
3729 ResolveDataLayout();
3730 if (Error Err = parseFunctionRecord(Record))
3731 return Err;
3732 break;
3733 case bitc::MODULE_CODE_IFUNC:
3734 case bitc::MODULE_CODE_ALIAS:
3735 case bitc::MODULE_CODE_ALIAS_OLD:
3736 if (Error Err = parseGlobalIndirectSymbolRecord(BitCode, Record))
3737 return Err;
3738 break;
3739 /// MODULE_CODE_VSTOFFSET: [offset]
3740 case bitc::MODULE_CODE_VSTOFFSET:
3741 if (Record.empty())
3742 return error("Invalid record");
3743 // Note that we subtract 1 here because the offset is relative to one word
3744 // before the start of the identification or module block, which was
3745 // historically always the start of the regular bitcode header.
3746 VSTOffset = Record[0] - 1;
3747 break;
3748 /// MODULE_CODE_SOURCE_FILENAME: [namechar x N]
3749 case bitc::MODULE_CODE_SOURCE_FILENAME:
3750 SmallString<128> ValueName;
3751 if (convertToString(Record, 0, ValueName))
3752 return error("Invalid record");
3753 TheModule->setSourceFileName(ValueName);
3754 break;
3755 }
3756 Record.clear();
3757 }
3758}
3759
3760Error BitcodeReader::parseBitcodeInto(Module *M, bool ShouldLazyLoadMetadata,
3761 bool IsImporting,
3762 DataLayoutCallbackTy DataLayoutCallback) {
3763 TheModule = M;
3764 MDLoader = MetadataLoader(Stream, *M, ValueList, IsImporting,
3765 [&](unsigned ID) { return getTypeByID(ID); });
3766 return parseModule(0, ShouldLazyLoadMetadata, DataLayoutCallback);
3767}
3768
3769Error BitcodeReader::typeCheckLoadStoreInst(Type *ValType, Type *PtrType) {
3770 if (!isa<PointerType>(PtrType))
3771 return error("Load/Store operand is not a pointer type");
3772 Type *ElemType = cast<PointerType>(PtrType)->getElementType();
3773
3774 if (ValType && ValType != ElemType)
3775 return error("Explicit load/store type does not match pointee "
3776 "type of pointer operand");
3777 if (!PointerType::isLoadableOrStorableType(ElemType))
3778 return error("Cannot load/store from pointer");
3779 return Error::success();
3780}
3781
3782void BitcodeReader::propagateByValSRetTypes(CallBase *CB,
3783 ArrayRef<Type *> ArgsFullTys) {
3784 for (unsigned i = 0; i != CB->arg_size(); ++i) {
3785 for (Attribute::AttrKind Kind : {Attribute::ByVal, Attribute::StructRet}) {
3786 if (!CB->paramHasAttr(i, Kind))
3787 continue;
3788
3789 CB->removeParamAttr(i, Kind);
3790
3791 Type *PtrEltTy = getPointerElementFlatType(ArgsFullTys[i]);
3792 Attribute NewAttr =
3793 Kind == Attribute::ByVal
3794 ? Attribute::getWithByValType(Context, PtrEltTy)
3795 : Attribute::getWithStructRetType(Context, PtrEltTy);
3796 CB->addParamAttr(i, NewAttr);
3797 }
3798 }
3799}
3800
3801/// Lazily parse the specified function body block.
3802Error BitcodeReader::parseFunctionBody(Function *F) {
3803 if (Error Err = Stream.EnterSubBlock(bitc::FUNCTION_BLOCK_ID))
3804 return Err;
3805
3806 // Unexpected unresolved metadata when parsing function.
3807 if (MDLoader->hasFwdRefs())
3808 return error("Invalid function metadata: incoming forward references");
3809
3810 InstructionList.clear();
3811 unsigned ModuleValueListSize = ValueList.size();
3812 unsigned ModuleMDLoaderSize = MDLoader->size();
3813
3814 // Add all the function arguments to the value table.
3815 unsigned ArgNo = 0;
3816 FunctionType *FullFTy = FunctionTypes[F];
3817 for (Argument &I : F->args()) {
3818 assert(I.getType() == flattenPointerTypes(FullFTy->getParamType(ArgNo)) &&((I.getType() == flattenPointerTypes(FullFTy->getParamType
(ArgNo)) && "Incorrect fully specified type for Function Argument"
) ? static_cast<void> (0) : __assert_fail ("I.getType() == flattenPointerTypes(FullFTy->getParamType(ArgNo)) && \"Incorrect fully specified type for Function Argument\""
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 3819, __PRETTY_FUNCTION__))
3819 "Incorrect fully specified type for Function Argument")((I.getType() == flattenPointerTypes(FullFTy->getParamType
(ArgNo)) && "Incorrect fully specified type for Function Argument"
) ? static_cast<void> (0) : __assert_fail ("I.getType() == flattenPointerTypes(FullFTy->getParamType(ArgNo)) && \"Incorrect fully specified type for Function Argument\""
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 3819, __PRETTY_FUNCTION__))
;
3820 ValueList.push_back(&I, FullFTy->getParamType(ArgNo++));
3821 }
3822 unsigned NextValueNo = ValueList.size();
3823 BasicBlock *CurBB = nullptr;
3824 unsigned CurBBNo = 0;
3825
3826 DebugLoc LastLoc;
3827 auto getLastInstruction = [&]() -> Instruction * {
3828 if (CurBB && !CurBB->empty())
3829 return &CurBB->back();
3830 else if (CurBBNo && FunctionBBs[CurBBNo - 1] &&
3831 !FunctionBBs[CurBBNo - 1]->empty())
3832 return &FunctionBBs[CurBBNo - 1]->back();
3833 return nullptr;
3834 };
3835
3836 std::vector<OperandBundleDef> OperandBundles;
3837
3838 // Read all the records.
3839 SmallVector<uint64_t, 64> Record;
3840
3841 while (true) {
3842 Expected<llvm::BitstreamEntry> MaybeEntry = Stream.advance();
3843 if (!MaybeEntry)
3844 return MaybeEntry.takeError();
3845 llvm::BitstreamEntry Entry = MaybeEntry.get();
3846
3847 switch (Entry.Kind) {
3848 case BitstreamEntry::Error:
3849 return error("Malformed block");
3850 case BitstreamEntry::EndBlock:
3851 goto OutOfRecordLoop;
3852
3853 case BitstreamEntry::SubBlock:
3854 switch (Entry.ID) {
3855 default: // Skip unknown content.
3856 if (Error Err = Stream.SkipBlock())
3857 return Err;
3858 break;
3859 case bitc::CONSTANTS_BLOCK_ID:
3860 if (Error Err = parseConstants())
3861 return Err;
3862 NextValueNo = ValueList.size();
3863 break;
3864 case bitc::VALUE_SYMTAB_BLOCK_ID:
3865 if (Error Err = parseValueSymbolTable())
3866 return Err;
3867 break;
3868 case bitc::METADATA_ATTACHMENT_ID:
3869 if (Error Err = MDLoader->parseMetadataAttachment(*F, InstructionList))
3870 return Err;
3871 break;
3872 case bitc::METADATA_BLOCK_ID:
3873 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-12~++20210124100612+2afaf072f5c1/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 3874, __PRETTY_FUNCTION__))
3874 "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-12~++20210124100612+2afaf072f5c1/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 3874, __PRETTY_FUNCTION__))
;
3875 if (Error Err = MDLoader->parseFunctionMetadata())
3876 return Err;
3877 break;
3878 case bitc::USELIST_BLOCK_ID:
3879 if (Error Err = parseUseLists())
3880 return Err;
3881 break;
3882 }
3883 continue;
3884
3885 case BitstreamEntry::Record:
3886 // The interesting case.
3887 break;
3888 }
3889
3890 // Read a record.
3891 Record.clear();
3892 Instruction *I = nullptr;
3893 Type *FullTy = nullptr;
3894 Expected<unsigned> MaybeBitCode = Stream.readRecord(Entry.ID, Record);
3895 if (!MaybeBitCode)
3896 return MaybeBitCode.takeError();
3897 switch (unsigned BitCode = MaybeBitCode.get()) {
3898 default: // Default behavior: reject
3899 return error("Invalid value");
3900 case bitc::FUNC_CODE_DECLAREBLOCKS: { // DECLAREBLOCKS: [nblocks]
3901 if (Record.empty() || Record[0] == 0)
3902 return error("Invalid record");
3903 // Create all the basic blocks for the function.
3904 FunctionBBs.resize(Record[0]);
3905
3906 // See if anything took the address of blocks in this function.
3907 auto BBFRI = BasicBlockFwdRefs.find(F);
3908 if (BBFRI == BasicBlockFwdRefs.end()) {
3909 for (unsigned i = 0, e = FunctionBBs.size(); i != e; ++i)
3910 FunctionBBs[i] = BasicBlock::Create(Context, "", F);
3911 } else {
3912 auto &BBRefs = BBFRI->second;
3913 // Check for invalid basic block references.
3914 if (BBRefs.size() > FunctionBBs.size())
3915 return error("Invalid ID");
3916 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-12~++20210124100612+2afaf072f5c1/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 3916, __PRETTY_FUNCTION__))
;
3917 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-12~++20210124100612+2afaf072f5c1/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 3917, __PRETTY_FUNCTION__))
;
3918 for (unsigned I = 0, E = FunctionBBs.size(), RE = BBRefs.size(); I != E;
3919 ++I)
3920 if (I < RE && BBRefs[I]) {
3921 BBRefs[I]->insertInto(F);
3922 FunctionBBs[I] = BBRefs[I];
3923 } else {
3924 FunctionBBs[I] = BasicBlock::Create(Context, "", F);
3925 }
3926
3927 // Erase from the table.
3928 BasicBlockFwdRefs.erase(BBFRI);
3929 }
3930
3931 CurBB = FunctionBBs[0];
3932 continue;
3933 }
3934
3935 case bitc::FUNC_CODE_DEBUG_LOC_AGAIN: // DEBUG_LOC_AGAIN
3936 // This record indicates that the last instruction is at the same
3937 // location as the previous instruction with a location.
3938 I = getLastInstruction();
3939
3940 if (!I)
3941 return error("Invalid record");
3942 I->setDebugLoc(LastLoc);
3943 I = nullptr;
3944 continue;
3945
3946 case bitc::FUNC_CODE_DEBUG_LOC: { // DEBUG_LOC: [line, col, scope, ia]
3947 I = getLastInstruction();
3948 if (!I || Record.size() < 4)
3949 return error("Invalid record");
3950
3951 unsigned Line = Record[0], Col = Record[1];
3952 unsigned ScopeID = Record[2], IAID = Record[3];
3953 bool isImplicitCode = Record.size() == 5 && Record[4];
3954
3955 MDNode *Scope = nullptr, *IA = nullptr;
3956 if (ScopeID) {
3957 Scope = dyn_cast_or_null<MDNode>(
3958 MDLoader->getMetadataFwdRefOrLoad(ScopeID - 1));
3959 if (!Scope)
3960 return error("Invalid record");
3961 }
3962 if (IAID) {
3963 IA = dyn_cast_or_null<MDNode>(
3964 MDLoader->getMetadataFwdRefOrLoad(IAID - 1));
3965 if (!IA)
3966 return error("Invalid record");
3967 }
3968 LastLoc = DILocation::get(Scope->getContext(), Line, Col, Scope, IA,
3969 isImplicitCode);
3970 I->setDebugLoc(LastLoc);
3971 I = nullptr;
3972 continue;
3973 }
3974 case bitc::FUNC_CODE_INST_UNOP: { // UNOP: [opval, ty, opcode]
3975 unsigned OpNum = 0;
3976 Value *LHS;
3977 if (getValueTypePair(Record, OpNum, NextValueNo, LHS) ||
3978 OpNum+1 > Record.size())
3979 return error("Invalid record");
3980
3981 int Opc = getDecodedUnaryOpcode(Record[OpNum++], LHS->getType());
3982 if (Opc == -1)
3983 return error("Invalid record");
3984 I = UnaryOperator::Create((Instruction::UnaryOps)Opc, LHS);
3985 InstructionList.push_back(I);
3986 if (OpNum < Record.size()) {
3987 if (isa<FPMathOperator>(I)) {
3988 FastMathFlags FMF = getDecodedFastMathFlags(Record[OpNum]);
3989 if (FMF.any())
3990 I->setFastMathFlags(FMF);
3991 }
3992 }
3993 break;
3994 }
3995 case bitc::FUNC_CODE_INST_BINOP: { // BINOP: [opval, ty, opval, opcode]
3996 unsigned OpNum = 0;
3997 Value *LHS, *RHS;
3998 if (getValueTypePair(Record, OpNum, NextValueNo, LHS) ||
3999 popValue(Record, OpNum, NextValueNo, LHS->getType(), RHS) ||
4000 OpNum+1 > Record.size())
4001 return error("Invalid record");
4002
4003 int Opc = getDecodedBinaryOpcode(Record[OpNum++], LHS->getType());
4004 if (Opc == -1)
4005 return error("Invalid record");
4006 I = BinaryOperator::Create((Instruction::BinaryOps)Opc, LHS, RHS);
4007 InstructionList.push_back(I);
4008 if (OpNum < Record.size()) {
4009 if (Opc == Instruction::Add ||
4010 Opc == Instruction::Sub ||
4011 Opc == Instruction::Mul ||
4012 Opc == Instruction::Shl) {
4013 if (Record[OpNum] & (1 << bitc::OBO_NO_SIGNED_WRAP))
4014 cast<BinaryOperator>(I)->setHasNoSignedWrap(true);
4015 if (Record[OpNum] & (1 << bitc::OBO_NO_UNSIGNED_WRAP))
4016 cast<BinaryOperator>(I)->setHasNoUnsignedWrap(true);
4017 } else if (Opc == Instruction::SDiv ||
4018 Opc == Instruction::UDiv ||
4019 Opc == Instruction::LShr ||
4020 Opc == Instruction::AShr) {
4021 if (Record[OpNum] & (1 << bitc::PEO_EXACT))
4022 cast<BinaryOperator>(I)->setIsExact(true);
4023 } else if (isa<FPMathOperator>(I)) {
4024 FastMathFlags FMF = getDecodedFastMathFlags(Record[OpNum]);
4025 if (FMF.any())
4026 I->setFastMathFlags(FMF);
4027 }
4028
4029 }
4030 break;
4031 }
4032 case bitc::FUNC_CODE_INST_CAST: { // CAST: [opval, opty, destty, castopc]
4033 unsigned OpNum = 0;
4034 Value *Op;
4035 if (getValueTypePair(Record, OpNum, NextValueNo, Op) ||
4036 OpNum+2 != Record.size())
4037 return error("Invalid record");
4038
4039 FullTy = getFullyStructuredTypeByID(Record[OpNum]);
4040 Type *ResTy = flattenPointerTypes(FullTy);
4041 int Opc = getDecodedCastOpcode(Record[OpNum + 1]);
4042 if (Opc == -1 || !ResTy)
4043 return error("Invalid record");
4044 Instruction *Temp = nullptr;
4045 if ((I = UpgradeBitCastInst(Opc, Op, ResTy, Temp))) {
4046 if (Temp) {
4047 InstructionList.push_back(Temp);
4048 assert(CurBB && "No current BB?")((CurBB && "No current BB?") ? static_cast<void>
(0) : __assert_fail ("CurBB && \"No current BB?\"", "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 4048, __PRETTY_FUNCTION__))
;
4049 CurBB->getInstList().push_back(Temp);
4050 }
4051 } else {
4052 auto CastOp = (Instruction::CastOps)Opc;
4053 if (!CastInst::castIsValid(CastOp, Op, ResTy))
4054 return error("Invalid cast");
4055 I = CastInst::Create(CastOp, Op, ResTy);
4056 }
4057 InstructionList.push_back(I);
4058 break;
4059 }
4060 case bitc::FUNC_CODE_INST_INBOUNDS_GEP_OLD:
4061 case bitc::FUNC_CODE_INST_GEP_OLD:
4062 case bitc::FUNC_CODE_INST_GEP: { // GEP: type, [n x operands]
4063 unsigned OpNum = 0;
4064
4065 Type *Ty;
4066 bool InBounds;
4067
4068 if (BitCode == bitc::FUNC_CODE_INST_GEP) {
4069 InBounds = Record[OpNum++];
4070 FullTy = getFullyStructuredTypeByID(Record[OpNum++]);
4071 Ty = flattenPointerTypes(FullTy);
4072 } else {
4073 InBounds = BitCode == bitc::FUNC_CODE_INST_INBOUNDS_GEP_OLD;
4074 Ty = nullptr;
4075 }
4076
4077 Value *BasePtr;
4078 Type *FullBaseTy = nullptr;
4079 if (getValueTypePair(Record, OpNum, NextValueNo, BasePtr, &FullBaseTy))
4080 return error("Invalid record");
4081
4082 if (!Ty) {
4083 std::tie(FullTy, Ty) =
4084 getPointerElementTypes(FullBaseTy->getScalarType());
4085 } else if (Ty != getPointerElementFlatType(FullBaseTy->getScalarType()))
4086 return error(
4087 "Explicit gep type does not match pointee type of pointer operand");
4088
4089 SmallVector<Value*, 16> GEPIdx;
4090 while (OpNum != Record.size()) {
4091 Value *Op;
4092 if (getValueTypePair(Record, OpNum, NextValueNo, Op))
4093 return error("Invalid record");
4094 GEPIdx.push_back(Op);
4095 }
4096
4097 I = GetElementPtrInst::Create(Ty, BasePtr, GEPIdx);
4098 FullTy = GetElementPtrInst::getGEPReturnType(FullTy, I, GEPIdx);
4099
4100 InstructionList.push_back(I);
4101 if (InBounds)
4102 cast<GetElementPtrInst>(I)->setIsInBounds(true);
4103 break;
4104 }
4105
4106 case bitc::FUNC_CODE_INST_EXTRACTVAL: {
4107 // EXTRACTVAL: [opty, opval, n x indices]
4108 unsigned OpNum = 0;
4109 Value *Agg;
4110 if (getValueTypePair(Record, OpNum, NextValueNo, Agg, &FullTy))
4111 return error("Invalid record");
4112
4113 unsigned RecSize = Record.size();
4114 if (OpNum == RecSize)
4115 return error("EXTRACTVAL: Invalid instruction with 0 indices");
4116
4117 SmallVector<unsigned, 4> EXTRACTVALIdx;
4118 for (; OpNum != RecSize; ++OpNum) {
4119 bool IsArray = FullTy->isArrayTy();
4120 bool IsStruct = FullTy->isStructTy();
4121 uint64_t Index = Record[OpNum];
4122
4123 if (!IsStruct && !IsArray)
4124 return error("EXTRACTVAL: Invalid type");
4125 if ((unsigned)Index != Index)
4126 return error("Invalid value");
4127 if (IsStruct && Index >= FullTy->getStructNumElements())
4128 return error("EXTRACTVAL: Invalid struct index");
4129 if (IsArray && Index >= FullTy->getArrayNumElements())
4130 return error("EXTRACTVAL: Invalid array index");
4131 EXTRACTVALIdx.push_back((unsigned)Index);
4132
4133 if (IsStruct)
4134 FullTy = FullTy->getStructElementType(Index);
4135 else
4136 FullTy = FullTy->getArrayElementType();
4137 }
4138
4139 I = ExtractValueInst::Create(Agg, EXTRACTVALIdx);
4140 InstructionList.push_back(I);
4141 break;
4142 }
4143
4144 case bitc::FUNC_CODE_INST_INSERTVAL: {
4145 // INSERTVAL: [opty, opval, opty, opval, n x indices]
4146 unsigned OpNum = 0;
4147 Value *Agg;
4148 if (getValueTypePair(Record, OpNum, NextValueNo, Agg, &FullTy))
4149 return error("Invalid record");
4150 Value *Val;
4151 if (getValueTypePair(Record, OpNum, NextValueNo, Val))
4152 return error("Invalid record");
4153
4154 unsigned RecSize = Record.size();
4155 if (OpNum == RecSize)
4156 return error("INSERTVAL: Invalid instruction with 0 indices");
4157
4158 SmallVector<unsigned, 4> INSERTVALIdx;
4159 Type *CurTy = Agg->getType();
4160 for (; OpNum != RecSize; ++OpNum) {
4161 bool IsArray = CurTy->isArrayTy();
4162 bool IsStruct = CurTy->isStructTy();
4163 uint64_t Index = Record[OpNum];
4164
4165 if (!IsStruct && !IsArray)
4166 return error("INSERTVAL: Invalid type");
4167 if ((unsigned)Index != Index)
4168 return error("Invalid value");
4169 if (IsStruct && Index >= CurTy->getStructNumElements())
4170 return error("INSERTVAL: Invalid struct index");
4171 if (IsArray && Index >= CurTy->getArrayNumElements())
4172 return error("INSERTVAL: Invalid array index");
4173
4174 INSERTVALIdx.push_back((unsigned)Index);
4175 if (IsStruct)
4176 CurTy = CurTy->getStructElementType(Index);
4177 else
4178 CurTy = CurTy->getArrayElementType();
4179 }
4180
4181 if (CurTy != Val->getType())
4182 return error("Inserted value type doesn't match aggregate type");
4183
4184 I = InsertValueInst::Create(Agg, Val, INSERTVALIdx);
4185 InstructionList.push_back(I);
4186 break;
4187 }
4188
4189 case bitc::FUNC_CODE_INST_SELECT: { // SELECT: [opval, ty, opval, opval]
4190 // obsolete form of select
4191 // handles select i1 ... in old bitcode
4192 unsigned OpNum = 0;
4193 Value *TrueVal, *FalseVal, *Cond;
4194 if (getValueTypePair(Record, OpNum, NextValueNo, TrueVal, &FullTy) ||
4195 popValue(Record, OpNum, NextValueNo, TrueVal->getType(), FalseVal) ||
4196 popValue(Record, OpNum, NextValueNo, Type::getInt1Ty(Context), Cond))
4197 return error("Invalid record");
4198
4199 I = SelectInst::Create(Cond, TrueVal, FalseVal);
4200 InstructionList.push_back(I);
4201 break;
4202 }
4203
4204 case bitc::FUNC_CODE_INST_VSELECT: {// VSELECT: [ty,opval,opval,predty,pred]
4205 // new form of select
4206 // handles select i1 or select [N x i1]
4207 unsigned OpNum = 0;
4208 Value *TrueVal, *FalseVal, *Cond;
4209 if (getValueTypePair(Record, OpNum, NextValueNo, TrueVal, &FullTy) ||
4210 popValue(Record, OpNum, NextValueNo, TrueVal->getType(), FalseVal) ||
4211 getValueTypePair(Record, OpNum, NextValueNo, Cond))
4212 return error("Invalid record");
4213
4214 // select condition can be either i1 or [N x i1]
4215 if (VectorType* vector_type =
4216 dyn_cast<VectorType>(Cond->getType())) {
4217 // expect <n x i1>
4218 if (vector_type->getElementType() != Type::getInt1Ty(Context))
4219 return error("Invalid type for value");
4220 } else {
4221 // expect i1
4222 if (Cond->getType() != Type::getInt1Ty(Context))
4223 return error("Invalid type for value");
4224 }
4225
4226 I = SelectInst::Create(Cond, TrueVal, FalseVal);
4227 InstructionList.push_back(I);
4228 if (OpNum < Record.size() && isa<FPMathOperator>(I)) {
4229 FastMathFlags FMF = getDecodedFastMathFlags(Record[OpNum]);
4230 if (FMF.any())
4231 I->setFastMathFlags(FMF);
4232 }
4233 break;
4234 }
4235
4236 case bitc::FUNC_CODE_INST_EXTRACTELT: { // EXTRACTELT: [opty, opval, opval]
4237 unsigned OpNum = 0;
4238 Value *Vec, *Idx;
4239 if (getValueTypePair(Record, OpNum, NextValueNo, Vec, &FullTy) ||
4240 getValueTypePair(Record, OpNum, NextValueNo, Idx))
4241 return error("Invalid record");
4242 if (!Vec->getType()->isVectorTy())
4243 return error("Invalid type for value");
4244 I = ExtractElementInst::Create(Vec, Idx);
4245 FullTy = cast<VectorType>(FullTy)->getElementType();
4246 InstructionList.push_back(I);
4247 break;
4248 }
4249
4250 case bitc::FUNC_CODE_INST_INSERTELT: { // INSERTELT: [ty, opval,opval,opval]
4251 unsigned OpNum = 0;
4252 Value *Vec, *Elt, *Idx;
4253 if (getValueTypePair(Record, OpNum, NextValueNo, Vec, &FullTy))
4254 return error("Invalid record");
4255 if (!Vec->getType()->isVectorTy())
4256 return error("Invalid type for value");
4257 if (popValue(Record, OpNum, NextValueNo,
4258 cast<VectorType>(Vec->getType())->getElementType(), Elt) ||
4259 getValueTypePair(Record, OpNum, NextValueNo, Idx))
4260 return error("Invalid record");
4261 I = InsertElementInst::Create(Vec, Elt, Idx);
4262 InstructionList.push_back(I);
4263 break;
4264 }
4265
4266 case bitc::FUNC_CODE_INST_SHUFFLEVEC: {// SHUFFLEVEC: [opval,ty,opval,opval]
4267 unsigned OpNum = 0;
4268 Value *Vec1, *Vec2, *Mask;
4269 if (getValueTypePair(Record, OpNum, NextValueNo, Vec1, &FullTy) ||
4270 popValue(Record, OpNum, NextValueNo, Vec1->getType(), Vec2))
4271 return error("Invalid record");
4272
4273 if (getValueTypePair(Record, OpNum, NextValueNo, Mask))
4274 return error("Invalid record");
4275 if (!Vec1->getType()->isVectorTy() || !Vec2->getType()->isVectorTy())
4276 return error("Invalid type for value");
4277
4278 I = new ShuffleVectorInst(Vec1, Vec2, Mask);
4279 FullTy =
4280 VectorType::get(cast<VectorType>(FullTy)->getElementType(),
4281 cast<VectorType>(Mask->getType())->getElementCount());
4282 InstructionList.push_back(I);
4283 break;
4284 }
4285
4286 case bitc::FUNC_CODE_INST_CMP: // CMP: [opty, opval, opval, pred]
4287 // Old form of ICmp/FCmp returning bool
4288 // Existed to differentiate between icmp/fcmp and vicmp/vfcmp which were
4289 // both legal on vectors but had different behaviour.
4290 case bitc::FUNC_CODE_INST_CMP2: { // CMP2: [opty, opval, opval, pred]
4291 // FCmp/ICmp returning bool or vector of bool
4292
4293 unsigned OpNum = 0;
4294 Value *LHS, *RHS;
4295 if (getValueTypePair(Record, OpNum, NextValueNo, LHS) ||
4296 popValue(Record, OpNum, NextValueNo, LHS->getType(), RHS))
4297 return error("Invalid record");
4298
4299 if (OpNum >= Record.size())
4300 return error(
4301 "Invalid record: operand number exceeded available operands");
4302
4303 unsigned PredVal = Record[OpNum];
4304 bool IsFP = LHS->getType()->isFPOrFPVectorTy();
4305 FastMathFlags FMF;
4306 if (IsFP && Record.size() > OpNum+1)
4307 FMF = getDecodedFastMathFlags(Record[++OpNum]);
4308
4309 if (OpNum+1 != Record.size())
4310 return error("Invalid record");
4311
4312 if (LHS->getType()->isFPOrFPVectorTy())
4313 I = new FCmpInst((FCmpInst::Predicate)PredVal, LHS, RHS);
4314 else
4315 I = new ICmpInst((ICmpInst::Predicate)PredVal, LHS, RHS);
4316
4317 if (FMF.any())
4318 I->setFastMathFlags(FMF);
4319 InstructionList.push_back(I);
4320 break;
4321 }
4322
4323 case bitc::FUNC_CODE_INST_RET: // RET: [opty,opval<optional>]
4324 {
4325 unsigned Size = Record.size();
4326 if (Size == 0) {
4327 I = ReturnInst::Create(Context);
4328 InstructionList.push_back(I);
4329 break;
4330 }
4331
4332 unsigned OpNum = 0;
4333 Value *Op = nullptr;
4334 if (getValueTypePair(Record, OpNum, NextValueNo, Op))
4335 return error("Invalid record");
4336 if (OpNum != Record.size())
4337 return error("Invalid record");
4338
4339 I = ReturnInst::Create(Context, Op);
4340 InstructionList.push_back(I);
4341 break;
4342 }
4343 case bitc::FUNC_CODE_INST_BR: { // BR: [bb#, bb#, opval] or [bb#]
4344 if (Record.size() != 1 && Record.size() != 3)
4345 return error("Invalid record");
4346 BasicBlock *TrueDest = getBasicBlock(Record[0]);
4347 if (!TrueDest)
4348 return error("Invalid record");
4349
4350 if (Record.size() == 1) {
4351 I = BranchInst::Create(TrueDest);
4352 InstructionList.push_back(I);
4353 }
4354 else {
4355 BasicBlock *FalseDest = getBasicBlock(Record[1]);
4356 Value *Cond = getValue(Record, 2, NextValueNo,
4357 Type::getInt1Ty(Context));
4358 if (!FalseDest || !Cond)
4359 return error("Invalid record");
4360 I = BranchInst::Create(TrueDest, FalseDest, Cond);
4361 InstructionList.push_back(I);
4362 }
4363 break;
4364 }
4365 case bitc::FUNC_CODE_INST_CLEANUPRET: { // CLEANUPRET: [val] or [val,bb#]
4366 if (Record.size() != 1 && Record.size() != 2)
4367 return error("Invalid record");
4368 unsigned Idx = 0;
4369 Value *CleanupPad =
4370 getValue(Record, Idx++, NextValueNo, Type::getTokenTy(Context));
4371 if (!CleanupPad)
4372 return error("Invalid record");
4373 BasicBlock *UnwindDest = nullptr;
4374 if (Record.size() == 2) {
4375 UnwindDest = getBasicBlock(Record[Idx++]);
4376 if (!UnwindDest)
4377 return error("Invalid record");
4378 }
4379
4380 I = CleanupReturnInst::Create(CleanupPad, UnwindDest);
4381 InstructionList.push_back(I);
4382 break;
4383 }
4384 case bitc::FUNC_CODE_INST_CATCHRET: { // CATCHRET: [val,bb#]
4385 if (Record.size() != 2)
4386 return error("Invalid record");
4387 unsigned Idx = 0;
4388 Value *CatchPad =
4389 getValue(Record, Idx++, NextValueNo, Type::getTokenTy(Context));
4390 if (!CatchPad)
4391 return error("Invalid record");
4392 BasicBlock *BB = getBasicBlock(Record[Idx++]);
4393 if (!BB)
4394 return error("Invalid record");
4395
4396 I = CatchReturnInst::Create(CatchPad, BB);
4397 InstructionList.push_back(I);
4398 break;
4399 }
4400 case bitc::FUNC_CODE_INST_CATCHSWITCH: { // CATCHSWITCH: [tok,num,(bb)*,bb?]
4401 // We must have, at minimum, the outer scope and the number of arguments.
4402 if (Record.size() < 2)
4403 return error("Invalid record");
4404
4405 unsigned Idx = 0;
4406
4407 Value *ParentPad =
4408 getValue(Record, Idx++, NextValueNo, Type::getTokenTy(Context));
4409
4410 unsigned NumHandlers = Record[Idx++];
4411
4412 SmallVector<BasicBlock *, 2> Handlers;
4413 for (unsigned Op = 0; Op != NumHandlers; ++Op) {
4414 BasicBlock *BB = getBasicBlock(Record[Idx++]);
4415 if (!BB)
4416 return error("Invalid record");
4417 Handlers.push_back(BB);
4418 }
4419
4420 BasicBlock *UnwindDest = nullptr;
4421 if (Idx + 1 == Record.size()) {
4422 UnwindDest = getBasicBlock(Record[Idx++]);
4423 if (!UnwindDest)
4424 return error("Invalid record");
4425 }
4426
4427 if (Record.size() != Idx)
4428 return error("Invalid record");
4429
4430 auto *CatchSwitch =
4431 CatchSwitchInst::Create(ParentPad, UnwindDest, NumHandlers);
4432 for (BasicBlock *Handler : Handlers)
4433 CatchSwitch->addHandler(Handler);
4434 I = CatchSwitch;
4435 InstructionList.push_back(I);
4436 break;
4437 }
4438 case bitc::FUNC_CODE_INST_CATCHPAD:
4439 case bitc::FUNC_CODE_INST_CLEANUPPAD: { // [tok,num,(ty,val)*]
4440 // We must have, at minimum, the outer scope and the number of arguments.
4441 if (Record.size() < 2)
4442 return error("Invalid record");
4443
4444 unsigned Idx = 0;
4445
4446 Value *ParentPad =
4447 getValue(Record, Idx++, NextValueNo, Type::getTokenTy(Context));
4448
4449 unsigned NumArgOperands = Record[Idx++];
4450
4451 SmallVector<Value *, 2> Args;
4452 for (unsigned Op = 0; Op != NumArgOperands; ++Op) {
4453 Value *Val;
4454 if (getValueTypePair(Record, Idx, NextValueNo, Val))
4455 return error("Invalid record");
4456 Args.push_back(Val);
4457 }
4458
4459 if (Record.size() != Idx)
4460 return error("Invalid record");
4461
4462 if (BitCode == bitc::FUNC_CODE_INST_CLEANUPPAD)
4463 I = CleanupPadInst::Create(ParentPad, Args);
4464 else
4465 I = CatchPadInst::Create(ParentPad, Args);
4466 InstructionList.push_back(I);
4467 break;
4468 }
4469 case bitc::FUNC_CODE_INST_SWITCH: { // SWITCH: [opty, op0, op1, ...]
4470 // Check magic
4471 if ((Record[0] >> 16) == SWITCH_INST_MAGIC) {
4472 // "New" SwitchInst format with case ranges. The changes to write this
4473 // format were reverted but we still recognize bitcode that uses it.
4474 // Hopefully someday we will have support for case ranges and can use
4475 // this format again.
4476
4477 Type *OpTy = getTypeByID(Record[1]);
4478 unsigned ValueBitWidth = cast<IntegerType>(OpTy)->getBitWidth();
4479
4480 Value *Cond = getValue(Record, 2, NextValueNo, OpTy);
4481 BasicBlock *Default = getBasicBlock(Record[3]);
4482 if (!OpTy || !Cond || !Default)
4483 return error("Invalid record");
4484
4485 unsigned NumCases = Record[4];
4486
4487 SwitchInst *SI = SwitchInst::Create(Cond, Default, NumCases);
4488 InstructionList.push_back(SI);
4489
4490 unsigned CurIdx = 5;
4491 for (unsigned i = 0; i != NumCases; ++i) {
4492 SmallVector<ConstantInt*, 1> CaseVals;
4493 unsigned NumItems = Record[CurIdx++];
4494 for (unsigned ci = 0; ci != NumItems; ++ci) {
4495 bool isSingleNumber = Record[CurIdx++];
4496
4497 APInt Low;
4498 unsigned ActiveWords = 1;
4499 if (ValueBitWidth > 64)
4500 ActiveWords = Record[CurIdx++];
4501 Low = readWideAPInt(makeArrayRef(&Record[CurIdx], ActiveWords),
4502 ValueBitWidth);
4503 CurIdx += ActiveWords;
4504
4505 if (!isSingleNumber) {
4506 ActiveWords = 1;
4507 if (ValueBitWidth > 64)
4508 ActiveWords = Record[CurIdx++];
4509 APInt High = readWideAPInt(
4510 makeArrayRef(&Record[CurIdx], ActiveWords), ValueBitWidth);
4511 CurIdx += ActiveWords;
4512
4513 // FIXME: It is not clear whether values in the range should be
4514 // compared as signed or unsigned values. The partially
4515 // implemented changes that used this format in the past used
4516 // unsigned comparisons.
4517 for ( ; Low.ule(High); ++Low)
4518 CaseVals.push_back(ConstantInt::get(Context, Low));
4519 } else
4520 CaseVals.push_back(ConstantInt::get(Context, Low));
4521 }
4522 BasicBlock *DestBB = getBasicBlock(Record[CurIdx++]);
4523 for (SmallVector<ConstantInt*, 1>::iterator cvi = CaseVals.begin(),
4524 cve = CaseVals.end(); cvi != cve; ++cvi)
4525 SI->addCase(*cvi, DestBB);
4526 }
4527 I = SI;
4528 break;
4529 }
4530
4531 // Old SwitchInst format without case ranges.
4532
4533 if (Record.size() < 3 || (Record.size() & 1) == 0)
4534 return error("Invalid record");
4535 Type *OpTy = getTypeByID(Record[0]);
4536 Value *Cond = getValue(Record, 1, NextValueNo, OpTy);
4537 BasicBlock *Default = getBasicBlock(Record[2]);
4538 if (!OpTy || !Cond || !Default)
4539 return error("Invalid record");
4540 unsigned NumCases = (Record.size()-3)/2;
4541 SwitchInst *SI = SwitchInst::Create(Cond, Default, NumCases);
4542 InstructionList.push_back(SI);
4543 for (unsigned i = 0, e = NumCases; i != e; ++i) {
4544 ConstantInt *CaseVal =
4545 dyn_cast_or_null<ConstantInt>(getFnValueByID(Record[3+i*2], OpTy));
4546 BasicBlock *DestBB = getBasicBlock(Record[1+3+i*2]);
4547 if (!CaseVal || !DestBB) {
4548 delete SI;
4549 return error("Invalid record");
4550 }
4551 SI->addCase(CaseVal, DestBB);
4552 }
4553 I = SI;
4554 break;
4555 }
4556 case bitc::FUNC_CODE_INST_INDIRECTBR: { // INDIRECTBR: [opty, op0, op1, ...]
4557 if (Record.size() < 2)
4558 return error("Invalid record");
4559 Type *OpTy = getTypeByID(Record[0]);
4560 Value *Address = getValue(Record, 1, NextValueNo, OpTy);
4561 if (!OpTy || !Address)
4562 return error("Invalid record");
4563 unsigned NumDests = Record.size()-2;
4564 IndirectBrInst *IBI = IndirectBrInst::Create(Address, NumDests);
4565 InstructionList.push_back(IBI);
4566 for (unsigned i = 0, e = NumDests; i != e; ++i) {
4567 if (BasicBlock *DestBB = getBasicBlock(Record[2+i])) {
4568 IBI->addDestination(DestBB);
4569 } else {
4570 delete IBI;
4571 return error("Invalid record");
4572 }
4573 }
4574 I = IBI;
4575 break;
4576 }
4577
4578 case bitc::FUNC_CODE_INST_INVOKE: {
4579 // INVOKE: [attrs, cc, normBB, unwindBB, fnty, op0,op1,op2, ...]
4580 if (Record.size() < 4)
4581 return error("Invalid record");
4582 unsigned OpNum = 0;
4583 AttributeList PAL = getAttributes(Record[OpNum++]);
4584 unsigned CCInfo = Record[OpNum++];
4585 BasicBlock *NormalBB = getBasicBlock(Record[OpNum++]);
4586 BasicBlock *UnwindBB = getBasicBlock(Record[OpNum++]);
4587
4588 FunctionType *FTy = nullptr;
4589 FunctionType *FullFTy = nullptr;
4590 if ((CCInfo >> 13) & 1) {
4591 FullFTy =
4592 dyn_cast<FunctionType>(getFullyStructuredTypeByID(Record[OpNum++]));
4593 if (!FullFTy)
4594 return error("Explicit invoke type is not a function type");
4595 FTy = cast<FunctionType>(flattenPointerTypes(FullFTy));
4596 }
4597
4598 Value *Callee;
4599 if (getValueTypePair(Record, OpNum, NextValueNo, Callee, &FullTy))
4600 return error("Invalid record");
4601
4602 PointerType *CalleeTy = dyn_cast<PointerType>(Callee->getType());
4603 if (!CalleeTy)
4604 return error("Callee is not a pointer");
4605 if (!FTy) {
4606 FullFTy =
4607 dyn_cast<FunctionType>(cast<PointerType>(FullTy)->getElementType());
4608 if (!FullFTy)
4609 return error("Callee is not of pointer to function type");
4610 FTy = cast<FunctionType>(flattenPointerTypes(FullFTy));
4611 } else if (getPointerElementFlatType(FullTy) != FTy)
4612 return error("Explicit invoke type does not match pointee type of "
4613 "callee operand");
4614 if (Record.size() < FTy->getNumParams() + OpNum)
4615 return error("Insufficient operands to call");
4616
4617 SmallVector<Value*, 16> Ops;
4618 SmallVector<Type *, 16> ArgsFullTys;
4619 for (unsigned i = 0, e = FTy->getNumParams(); i != e; ++i, ++OpNum) {
4620 Ops.push_back(getValue(Record, OpNum, NextValueNo,
4621 FTy->getParamType(i)));
4622 ArgsFullTys.push_back(FullFTy->getParamType(i));
4623 if (!Ops.back())
4624 return error("Invalid record");
4625 }
4626
4627 if (!FTy->isVarArg()) {
4628 if (Record.size() != OpNum)
4629 return error("Invalid record");
4630 } else {
4631 // Read type/value pairs for varargs params.
4632 while (OpNum != Record.size()) {
4633 Value *Op;
4634 Type *FullTy;
4635 if (getValueTypePair(Record, OpNum, NextValueNo, Op, &FullTy))
4636 return error("Invalid record");
4637 Ops.push_back(Op);
4638 ArgsFullTys.push_back(FullTy);
4639 }
4640 }
4641
4642 I = InvokeInst::Create(FTy, Callee, NormalBB, UnwindBB, Ops,
4643 OperandBundles);
4644 FullTy = FullFTy->getReturnType();
4645 OperandBundles.clear();
4646 InstructionList.push_back(I);
4647 cast<InvokeInst>(I)->setCallingConv(
4648 static_cast<CallingConv::ID>(CallingConv::MaxID & CCInfo));
4649 cast<InvokeInst>(I)->setAttributes(PAL);
4650 propagateByValSRetTypes(cast<CallBase>(I), ArgsFullTys);
4651
4652 break;
4653 }
4654 case bitc::FUNC_CODE_INST_RESUME: { // RESUME: [opval]
4655 unsigned Idx = 0;
4656 Value *Val = nullptr;
4657 if (getValueTypePair(Record, Idx, NextValueNo, Val))
4658 return error("Invalid record");
4659 I = ResumeInst::Create(Val);
4660 InstructionList.push_back(I);
4661 break;
4662 }
4663 case bitc::FUNC_CODE_INST_CALLBR: {
4664 // CALLBR: [attr, cc, norm, transfs, fty, fnid, args]
4665 unsigned OpNum = 0;
4666 AttributeList PAL = getAttributes(Record[OpNum++]);
4667 unsigned CCInfo = Record[OpNum++];
4668
4669 BasicBlock *DefaultDest = getBasicBlock(Record[OpNum++]);
4670 unsigned NumIndirectDests = Record[OpNum++];
4671 SmallVector<BasicBlock *, 16> IndirectDests;
4672 for (unsigned i = 0, e = NumIndirectDests; i != e; ++i)
4673 IndirectDests.push_back(getBasicBlock(Record[OpNum++]));
4674
4675 FunctionType *FTy = nullptr;
4676 FunctionType *FullFTy = nullptr;
4677 if ((CCInfo >> bitc::CALL_EXPLICIT_TYPE) & 1) {
4678 FullFTy =
4679 dyn_cast<FunctionType>(getFullyStructuredTypeByID(Record[OpNum++]));
4680 if (!FullFTy)
4681 return error("Explicit call type is not a function type");
4682 FTy = cast<FunctionType>(flattenPointerTypes(FullFTy));
4683 }
4684
4685 Value *Callee;
4686 if (getValueTypePair(Record, OpNum, NextValueNo, Callee, &FullTy))
4687 return error("Invalid record");
4688
4689 PointerType *OpTy = dyn_cast<PointerType>(Callee->getType());
4690 if (!OpTy)
4691 return error("Callee is not a pointer type");
4692 if (!FTy) {
4693 FullFTy =
4694 dyn_cast<FunctionType>(cast<PointerType>(FullTy)->getElementType());
4695 if (!FullFTy)
4696 return error("Callee is not of pointer to function type");
4697 FTy = cast<FunctionType>(flattenPointerTypes(FullFTy));
4698 } else if (getPointerElementFlatType(FullTy) != FTy)
4699 return error("Explicit call type does not match pointee type of "
4700 "callee operand");
4701 if (Record.size() < FTy->getNumParams() + OpNum)
4702 return error("Insufficient operands to call");
4703
4704 SmallVector<Value*, 16> Args;
4705 // Read the fixed params.
4706 for (unsigned i = 0, e = FTy->getNumParams(); i != e; ++i, ++OpNum) {
4707 if (FTy->getParamType(i)->isLabelTy())
4708 Args.push_back(getBasicBlock(Record[OpNum]));
4709 else
4710 Args.push_back(getValue(Record, OpNum, NextValueNo,
4711 FTy->getParamType(i)));
4712 if (!Args.back())
4713 return error("Invalid record");
4714 }
4715
4716 // Read type/value pairs for varargs params.
4717 if (!FTy->isVarArg()) {
4718 if (OpNum != Record.size())
4719 return error("Invalid record");
4720 } else {
4721 while (OpNum != Record.size()) {
4722 Value *Op;
4723 if (getValueTypePair(Record, OpNum, NextValueNo, Op))
4724 return error("Invalid record");
4725 Args.push_back(Op);
4726 }
4727 }
4728
4729 I = CallBrInst::Create(FTy, Callee, DefaultDest, IndirectDests, Args,
4730 OperandBundles);
4731 FullTy = FullFTy->getReturnType();
4732 OperandBundles.clear();
4733 InstructionList.push_back(I);
4734 cast<CallBrInst>(I)->setCallingConv(
4735 static_cast<CallingConv::ID>((0x7ff & CCInfo) >> bitc::CALL_CCONV));
4736 cast<CallBrInst>(I)->setAttributes(PAL);
4737 break;
4738 }
4739 case bitc::FUNC_CODE_INST_UNREACHABLE: // UNREACHABLE
4740 I = new UnreachableInst(Context);
4741 InstructionList.push_back(I);
4742 break;
4743 case bitc::FUNC_CODE_INST_PHI: { // PHI: [ty, val0,bb0, ...]
4744 if (Record.empty())
4745 return error("Invalid record");
4746 // The first record specifies the type.
4747 FullTy = getFullyStructuredTypeByID(Record[0]);
4748 Type *Ty = flattenPointerTypes(FullTy);
4749 if (!Ty)
4750 return error("Invalid record");
4751
4752 // Phi arguments are pairs of records of [value, basic block].
4753 // There is an optional final record for fast-math-flags if this phi has a
4754 // floating-point type.
4755 size_t NumArgs = (Record.size() - 1) / 2;
4756 PHINode *PN = PHINode::Create(Ty, NumArgs);
4757 if ((Record.size() - 1) % 2 == 1 && !isa<FPMathOperator>(PN))
4758 return error("Invalid record");
4759 InstructionList.push_back(PN);
4760
4761 for (unsigned i = 0; i != NumArgs; i++) {
4762 Value *V;
4763 // With the new function encoding, it is possible that operands have
4764 // negative IDs (for forward references). Use a signed VBR
4765 // representation to keep the encoding small.
4766 if (UseRelativeIDs)
4767 V = getValueSigned(Record, i * 2 + 1, NextValueNo, Ty);
4768 else
4769 V = getValue(Record, i * 2 + 1, NextValueNo, Ty);
4770 BasicBlock *BB = getBasicBlock(Record[i * 2 + 2]);
4771 if (!V || !BB)
4772 return error("Invalid record");
4773 PN->addIncoming(V, BB);
4774 }
4775 I = PN;
4776
4777 // If there are an even number of records, the final record must be FMF.
4778 if (Record.size() % 2 == 0) {
4779 assert(isa<FPMathOperator>(I) && "Unexpected phi type")((isa<FPMathOperator>(I) && "Unexpected phi type"
) ? static_cast<void> (0) : __assert_fail ("isa<FPMathOperator>(I) && \"Unexpected phi type\""
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 4779, __PRETTY_FUNCTION__))
;
4780 FastMathFlags FMF = getDecodedFastMathFlags(Record[Record.size() - 1]);
4781 if (FMF.any())
4782 I->setFastMathFlags(FMF);
4783 }
4784
4785 break;
4786 }
4787
4788 case bitc::FUNC_CODE_INST_LANDINGPAD:
4789 case bitc::FUNC_CODE_INST_LANDINGPAD_OLD: {
4790 // LANDINGPAD: [ty, val, val, num, (id0,val0 ...)?]
4791 unsigned Idx = 0;
4792 if (BitCode == bitc::FUNC_CODE_INST_LANDINGPAD) {
4793 if (Record.size() < 3)
4794 return error("Invalid record");
4795 } else {
4796 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-12~++20210124100612+2afaf072f5c1/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 4796, __PRETTY_FUNCTION__))
;
4797 if (Record.size() < 4)
4798 return error("Invalid record");
4799 }
4800 FullTy = getFullyStructuredTypeByID(Record[Idx++]);
4801 Type *Ty = flattenPointerTypes(FullTy);
4802 if (!Ty)
4803 return error("Invalid record");
4804 if (BitCode == bitc::FUNC_CODE_INST_LANDINGPAD_OLD) {
4805 Value *PersFn = nullptr;
4806 if (getValueTypePair(Record, Idx, NextValueNo, PersFn))
4807 return error("Invalid record");
4808
4809 if (!F->hasPersonalityFn())
4810 F->setPersonalityFn(cast<Constant>(PersFn));
4811 else if (F->getPersonalityFn() != cast<Constant>(PersFn))
4812 return error("Personality function mismatch");
4813 }
4814
4815 bool IsCleanup = !!Record[Idx++];
4816 unsigned NumClauses = Record[Idx++];
4817 LandingPadInst *LP = LandingPadInst::Create(Ty, NumClauses);
4818 LP->setCleanup(IsCleanup);
4819 for (unsigned J = 0; J != NumClauses; ++J) {
4820 LandingPadInst::ClauseType CT =
4821 LandingPadInst::ClauseType(Record[Idx++]); (void)CT;
4822 Value *Val;
4823
4824 if (getValueTypePair(Record, Idx, NextValueNo, Val)) {
4825 delete LP;
4826 return error("Invalid record");
4827 }
4828
4829 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-12~++20210124100612+2afaf072f5c1/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 4831, __PRETTY_FUNCTION__))
4830 !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-12~++20210124100612+2afaf072f5c1/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 4831, __PRETTY_FUNCTION__))
4831 "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-12~++20210124100612+2afaf072f5c1/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 4831, __PRETTY_FUNCTION__))
;
4832 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-12~++20210124100612+2afaf072f5c1/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 4834, __PRETTY_FUNCTION__))
4833 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-12~++20210124100612+2afaf072f5c1/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 4834, __PRETTY_FUNCTION__))
4834 "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-12~++20210124100612+2afaf072f5c1/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 4834, __PRETTY_FUNCTION__))
;
4835 LP->addClause(cast<Constant>(Val));
4836 }
4837
4838 I = LP;
4839 InstructionList.push_back(I);
4840 break;
4841 }
4842
4843 case bitc::FUNC_CODE_INST_ALLOCA: { // ALLOCA: [instty, opty, op, align]
4844 if (Record.size() != 4)
4845 return error("Invalid record");
4846 using APV = AllocaPackedValues;
4847 const uint64_t Rec = Record[3];
4848 const bool InAlloca = Bitfield::get<APV::UsedWithInAlloca>(Rec);
4849 const bool SwiftError = Bitfield::get<APV::SwiftError>(Rec);
4850 FullTy = getFullyStructuredTypeByID(Record[0]);
4851 Type *Ty = flattenPointerTypes(FullTy);
4852 if (!Bitfield::get<APV::ExplicitType>(Rec)) {
4853 auto *PTy = dyn_cast_or_null<PointerType>(Ty);
4854 if (!PTy)
4855 return error("Old-style alloca with a non-pointer type");
4856 std::tie(FullTy, Ty) = getPointerElementTypes(FullTy);
4857 }
4858 Type *OpTy = getTypeByID(Record[1]);
4859 Value *Size = getFnValueByID(Record[2], OpTy);
4860 MaybeAlign Align;
4861 if (Error Err =
4862 parseAlignmentValue(Bitfield::get<APV::Align>(Rec), Align)) {
4863 return Err;
4864 }
4865 if (!Ty || !Size)
4866 return error("Invalid record");
4867
4868 // FIXME: Make this an optional field.
4869 const DataLayout &DL = TheModule->getDataLayout();
4870 unsigned AS = DL.getAllocaAddrSpace();
4871
4872 SmallPtrSet<Type *, 4> Visited;
4873 if (!Align && !Ty->isSized(&Visited))
4874 return error("alloca of unsized type");
4875 if (!Align)
4876 Align = DL.getPrefTypeAlign(Ty);
4877
4878 AllocaInst *AI = new AllocaInst(Ty, AS, Size, *Align);
4879 AI->setUsedWithInAlloca(InAlloca);
4880 AI->setSwiftError(SwiftError);
4881 I = AI;
4882 FullTy = PointerType::get(FullTy, AS);
4883 InstructionList.push_back(I);
4884 break;
4885 }
4886 case bitc::FUNC_CODE_INST_LOAD: { // LOAD: [opty, op, align, vol]
4887 unsigned OpNum = 0;
4888 Value *Op;
4889 if (getValueTypePair(Record, OpNum, NextValueNo, Op, &FullTy) ||
4890 (OpNum + 2 != Record.size() && OpNum + 3 != Record.size()))
4891 return error("Invalid record");
4892
4893 if (!isa<PointerType>(Op->getType()))
4894 return error("Load operand is not a pointer type");
4895
4896 Type *Ty = nullptr;
4897 if (OpNum + 3 == Record.size()) {
4898 FullTy = getFullyStructuredTypeByID(Record[OpNum++]);
4899 Ty = flattenPointerTypes(FullTy);
4900 } else
4901 std::tie(FullTy, Ty) = getPointerElementTypes(FullTy);
4902
4903 if (Error Err = typeCheckLoadStoreInst(Ty, Op->getType()))
4904 return Err;
4905
4906 MaybeAlign Align;
4907 if (Error Err = parseAlignmentValue(Record[OpNum], Align))
4908 return Err;
4909 SmallPtrSet<Type *, 4> Visited;
4910 if (!Align && !Ty->isSized(&Visited))
4911 return error("load of unsized type");
4912 if (!Align)
4913 Align = TheModule->getDataLayout().getABITypeAlign(Ty);
4914 I = new LoadInst(Ty, Op, "", Record[OpNum + 1], *Align);
4915 InstructionList.push_back(I);
4916 break;
4917 }
4918 case bitc::FUNC_CODE_INST_LOADATOMIC: {
4919 // LOADATOMIC: [opty, op, align, vol, ordering, ssid]
4920 unsigned OpNum = 0;
4921 Value *Op;
4922 if (getValueTypePair(Record, OpNum, NextValueNo, Op, &FullTy) ||
4923 (OpNum + 4 != Record.size() && OpNum + 5 != Record.size()))
4924 return error("Invalid record");
4925
4926 if (!isa<PointerType>(Op->getType()))
4927 return error("Load operand is not a pointer type");
4928
4929 Type *Ty = nullptr;
4930 if (OpNum + 5 == Record.size()) {
4931 FullTy = getFullyStructuredTypeByID(Record[OpNum++]);
4932 Ty = flattenPointerTypes(FullTy);
4933 } else
4934 std::tie(FullTy, Ty) = getPointerElementTypes(FullTy);
4935
4936 if (Error Err = typeCheckLoadStoreInst(Ty, Op->getType()))
4937 return Err;
4938
4939 AtomicOrdering Ordering = getDecodedOrdering(Record[OpNum + 2]);
4940 if (Ordering == AtomicOrdering::NotAtomic ||
4941 Ordering == AtomicOrdering::Release ||
4942 Ordering == AtomicOrdering::AcquireRelease)
4943 return error("Invalid record");
4944 if (Ordering != AtomicOrdering::NotAtomic && Record[OpNum] == 0)
4945 return error("Invalid record");
4946 SyncScope::ID SSID = getDecodedSyncScopeID(Record[OpNum + 3]);
4947
4948 MaybeAlign Align;
4949 if (Error Err = parseAlignmentValue(Record[OpNum], Align))
4950 return Err;
4951 if (!Align)
4952 return error("Alignment missing from atomic load");
4953 I = new LoadInst(Ty, Op, "", Record[OpNum + 1], *Align, Ordering, SSID);
4954 InstructionList.push_back(I);
4955 break;
4956 }
4957 case bitc::FUNC_CODE_INST_STORE:
4958 case bitc::FUNC_CODE_INST_STORE_OLD: { // STORE2:[ptrty, ptr, val, align, vol]
4959 unsigned OpNum = 0;
4960 Value *Val, *Ptr;
4961 Type *FullTy;
4962 if (getValueTypePair(Record, OpNum, NextValueNo, Ptr, &FullTy) ||
4963 (BitCode == bitc::FUNC_CODE_INST_STORE
4964 ? getValueTypePair(Record, OpNum, NextValueNo, Val)
4965 : popValue(Record, OpNum, NextValueNo,
4966 getPointerElementFlatType(FullTy), Val)) ||
4967 OpNum + 2 != Record.size())
4968 return error("Invalid record");
4969
4970 if (Error Err = typeCheckLoadStoreInst(Val->getType(), Ptr->getType()))
4971 return Err;
4972 MaybeAlign Align;
4973 if (Error Err = parseAlignmentValue(Record[OpNum], Align))
4974 return Err;
4975 SmallPtrSet<Type *, 4> Visited;
4976 if (!Align && !Val->getType()->isSized(&Visited))
4977 return error("store of unsized type");
4978 if (!Align)
4979 Align = TheModule->getDataLayout().getABITypeAlign(Val->getType());
4980 I = new StoreInst(Val, Ptr, Record[OpNum + 1], *Align);
4981 InstructionList.push_back(I);
4982 break;
4983 }
4984 case bitc::FUNC_CODE_INST_STOREATOMIC:
4985 case bitc::FUNC_CODE_INST_STOREATOMIC_OLD: {
4986 // STOREATOMIC: [ptrty, ptr, val, align, vol, ordering, ssid]
4987 unsigned OpNum = 0;
4988 Value *Val, *Ptr;
4989 Type *FullTy;
4990 if (getValueTypePair(Record, OpNum, NextValueNo, Ptr, &FullTy) ||
4991 !isa<PointerType>(Ptr->getType()) ||
4992 (BitCode == bitc::FUNC_CODE_INST_STOREATOMIC
4993 ? getValueTypePair(Record, OpNum, NextValueNo, Val)
4994 : popValue(Record, OpNum, NextValueNo,
4995 getPointerElementFlatType(FullTy), Val)) ||
4996 OpNum + 4 != Record.size())
4997 return error("Invalid record");
4998
4999 if (Error Err = typeCheckLoadStoreInst(Val->getType(), Ptr->getType()))
5000 return Err;
5001 AtomicOrdering Ordering = getDecodedOrdering(Record[OpNum + 2]);
5002 if (Ordering == AtomicOrdering::NotAtomic ||
5003 Ordering == AtomicOrdering::Acquire ||
5004 Ordering == AtomicOrdering::AcquireRelease)
5005 return error("Invalid record");
5006 SyncScope::ID SSID = getDecodedSyncScopeID(Record[OpNum + 3]);
5007 if (Ordering != AtomicOrdering::NotAtomic && Record[OpNum] == 0)
5008 return error("Invalid record");
5009
5010 MaybeAlign Align;
5011 if (Error Err = parseAlignmentValue(Record[OpNum], Align))
5012 return Err;
5013 if (!Align)
5014 return error("Alignment missing from atomic store");
5015 I = new StoreInst(Val, Ptr, Record[OpNum + 1], *Align, Ordering, SSID);
5016 InstructionList.push_back(I);
5017 break;
5018 }
5019 case bitc::FUNC_CODE_INST_CMPXCHG_OLD: {
5020 // CMPXCHG_OLD: [ptrty, ptr, cmp, val, vol, ordering, synchscope,
5021 // failure_ordering?, weak?]
5022 const size_t NumRecords = Record.size();
5023 unsigned OpNum = 0;
5024 Value *Ptr = nullptr;
5025 if (getValueTypePair(Record, OpNum, NextValueNo, Ptr, &FullTy))
5026 return error("Invalid record");
5027
5028 if (!isa<PointerType>(Ptr->getType()))
5029 return error("Cmpxchg operand is not a pointer type");
5030
5031 Value *Cmp = nullptr;
5032 if (popValue(Record, OpNum, NextValueNo,
5033 getPointerElementFlatType(FullTy), Cmp))
5034 return error("Invalid record");
5035
5036 FullTy = cast<PointerType>(FullTy)->getElementType();
5037
5038 Value *New = nullptr;
5039 if (popValue(Record, OpNum, NextValueNo, Cmp->getType(), New) ||
5040 NumRecords < OpNum + 3 || NumRecords > OpNum + 5)
5041 return error("Invalid record");
5042
5043 const AtomicOrdering SuccessOrdering =
5044 getDecodedOrdering(Record[OpNum + 1]);
5045 if (SuccessOrdering == AtomicOrdering::NotAtomic ||
5046 SuccessOrdering == AtomicOrdering::Unordered)
5047 return error("Invalid record");
5048
5049 const SyncScope::ID SSID = getDecodedSyncScopeID(Record[OpNum + 2]);
5050
5051 if (Error Err = typeCheckLoadStoreInst(Cmp->getType(), Ptr->getType()))
5052 return Err;
5053
5054 const AtomicOrdering FailureOrdering =
5055 NumRecords < 7
5056 ? AtomicCmpXchgInst::getStrongestFailureOrdering(SuccessOrdering)
5057 : getDecodedOrdering(Record[OpNum + 3]);
5058
5059 const Align Alignment(
5060 TheModule->getDataLayout().getTypeStoreSize(Cmp->getType()));
5061
5062 I = new AtomicCmpXchgInst(Ptr, Cmp, New, Alignment, SuccessOrdering,
5063 FailureOrdering, SSID);
5064 cast<AtomicCmpXchgInst>(I)->setVolatile(Record[OpNum]);
5065 FullTy = StructType::get(Context, {FullTy, Type::getInt1Ty(Context)});
5066
5067 if (NumRecords < 8) {
5068 // Before weak cmpxchgs existed, the instruction simply returned the
5069 // value loaded from memory, so bitcode files from that era will be
5070 // expecting the first component of a modern cmpxchg.
5071 CurBB->getInstList().push_back(I);
5072 I = ExtractValueInst::Create(I, 0);
5073 FullTy = cast<StructType>(FullTy)->getElementType(0);
5074 } else {
5075 cast<AtomicCmpXchgInst>(I)->setWeak(Record[OpNum + 4]);
5076 }
5077
5078 InstructionList.push_back(I);
5079 break;
5080 }
5081 case bitc::FUNC_CODE_INST_CMPXCHG: {
5082 // CMPXCHG: [ptrty, ptr, cmp, val, vol, success_ordering, synchscope,
5083 // failure_ordering, weak]
5084 const size_t NumRecords = Record.size();
5085 unsigned OpNum = 0;
5086 Value *Ptr = nullptr;
5087 if (getValueTypePair(Record, OpNum, NextValueNo, Ptr, &FullTy))
5088 return error("Invalid record");
5089
5090 if (!isa<PointerType>(Ptr->getType()))
5091 return error("Cmpxchg operand is not a pointer type");
5092
5093 Value *Cmp = nullptr;
5094 if (getValueTypePair(Record, OpNum, NextValueNo, Cmp, &FullTy))
5095 return error("Invalid record");
5096
5097 Value *Val = nullptr;
5098 if (popValue(Record, OpNum, NextValueNo, Cmp->getType(), Val) ||
5099 NumRecords < OpNum + 3 || NumRecords > OpNum + 5)
5100 return error("Invalid record");
5101
5102 const AtomicOrdering SuccessOrdering =
5103 getDecodedOrdering(Record[OpNum + 1]);
5104 if (SuccessOrdering == AtomicOrdering::NotAtomic ||
5105 SuccessOrdering == AtomicOrdering::Unordered)
5106 return error("Invalid record");
5107
5108 const SyncScope::ID SSID = getDecodedSyncScopeID(Record[OpNum + 2]);
5109
5110 if (Error Err = typeCheckLoadStoreInst(Cmp->getType(), Ptr->getType()))
5111 return Err;
5112
5113 const AtomicOrdering FailureOrdering =
5114 getDecodedOrdering(Record[OpNum + 3]);
5115
5116 const Align Alignment(
5117 TheModule->getDataLayout().getTypeStoreSize(Cmp->getType()));
5118
5119 I = new AtomicCmpXchgInst(Ptr, Cmp, Val, Alignment, SuccessOrdering,
5120 FailureOrdering, SSID);
5121 FullTy = StructType::get(Context, {FullTy, Type::getInt1Ty(Context)});
5122 cast<AtomicCmpXchgInst>(I)->setVolatile(Record[OpNum]);
5123 cast<AtomicCmpXchgInst>(I)->setWeak(Record[OpNum + 4]);
5124
5125 InstructionList.push_back(I);
5126 break;
5127 }
5128 case bitc::FUNC_CODE_INST_ATOMICRMW: {
5129 // ATOMICRMW:[ptrty, ptr, val, op, vol, ordering, ssid]
5130 unsigned OpNum = 0;
5131 Value *Ptr, *Val;
5132 if (getValueTypePair(Record, OpNum, NextValueNo, Ptr, &FullTy) ||
5133 !isa<PointerType>(Ptr->getType()) ||
5134 popValue(Record, OpNum, NextValueNo,
5135 getPointerElementFlatType(FullTy), Val) ||
5136 OpNum + 4 != Record.size())
5137 return error("Invalid record");
5138 AtomicRMWInst::BinOp Operation = getDecodedRMWOperation(Record[OpNum]);
5139 if (Operation < AtomicRMWInst::FIRST_BINOP ||
5140 Operation > AtomicRMWInst::LAST_BINOP)
5141 return error("Invalid record");
5142 AtomicOrdering Ordering = getDecodedOrdering(Record[OpNum + 2]);
5143 if (Ordering == AtomicOrdering::NotAtomic ||
5144 Ordering == AtomicOrdering::Unordered)
5145 return error("Invalid record");
5146 SyncScope::ID SSID = getDecodedSyncScopeID(Record[OpNum + 3]);
5147 Align Alignment(
5148 TheModule->getDataLayout().getTypeStoreSize(Val->getType()));
5149 I = new AtomicRMWInst(Operation, Ptr, Val, Alignment, Ordering, SSID);
5150 FullTy = getPointerElementFlatType(FullTy);
5151 cast<AtomicRMWInst>(I)->setVolatile(Record[OpNum+1]);
5152 InstructionList.push_back(I);
5153 break;
5154 }
5155 case bitc::FUNC_CODE_INST_FENCE: { // FENCE:[ordering, ssid]
5156 if (2 != Record.size())
5157 return error("Invalid record");
5158 AtomicOrdering Ordering = getDecodedOrdering(Record[0]);
5159 if (Ordering == AtomicOrdering::NotAtomic ||
5160 Ordering == AtomicOrdering::Unordered ||
5161 Ordering == AtomicOrdering::Monotonic)
5162 return error("Invalid record");
5163 SyncScope::ID SSID = getDecodedSyncScopeID(Record[1]);
5164 I = new FenceInst(Context, Ordering, SSID);
5165 InstructionList.push_back(I);
5166 break;
5167 }
5168 case bitc::FUNC_CODE_INST_CALL: {
5169 // CALL: [paramattrs, cc, fmf, fnty, fnid, arg0, arg1...]
5170 if (Record.size() < 3)
5171 return error("Invalid record");
5172
5173 unsigned OpNum = 0;
5174 AttributeList PAL = getAttributes(Record[OpNum++]);
5175 unsigned CCInfo = Record[OpNum++];
5176
5177 FastMathFlags FMF;
5178 if ((CCInfo >> bitc::CALL_FMF) & 1) {
5179 FMF = getDecodedFastMathFlags(Record[OpNum++]);
5180 if (!FMF.any())
5181 return error("Fast math flags indicator set for call with no FMF");
5182 }
5183
5184 FunctionType *FTy = nullptr;
5185 FunctionType *FullFTy = nullptr;
5186 if ((CCInfo >> bitc::CALL_EXPLICIT_TYPE) & 1) {
5187 FullFTy =
5188 dyn_cast<FunctionType>(getFullyStructuredTypeByID(Record[OpNum++]));
5189 if (!FullFTy)
5190 return error("Explicit call type is not a function type");
5191 FTy = cast<FunctionType>(flattenPointerTypes(FullFTy));
5192 }
5193
5194 Value *Callee;
5195 if (getValueTypePair(Record, OpNum, NextValueNo, Callee, &FullTy))
5196 return error("Invalid record");
5197
5198 PointerType *OpTy = dyn_cast<PointerType>(Callee->getType());
5199 if (!OpTy)
5200 return error("Callee is not a pointer type");
5201 if (!FTy) {
5202 FullFTy =
5203 dyn_cast<FunctionType>(cast<PointerType>(FullTy)->getElementType());
5204 if (!FullFTy)
5205 return error("Callee is not of pointer to function type");
5206 FTy = cast<FunctionType>(flattenPointerTypes(FullFTy));
5207 } else if (getPointerElementFlatType(FullTy) != FTy)
5208 return error("Explicit call type does not match pointee type of "
5209 "callee operand");
5210 if (Record.size() < FTy->getNumParams() + OpNum)
5211 return error("Insufficient operands to call");
5212
5213 SmallVector<Value*, 16> Args;
5214 SmallVector<Type*, 16> ArgsFullTys;
5215 // Read the fixed params.
5216 for (unsigned i = 0, e = FTy->getNumParams(); i != e; ++i, ++OpNum) {
5217 if (FTy->getParamType(i)->isLabelTy())
5218 Args.push_back(getBasicBlock(Record[OpNum]));
5219 else
5220 Args.push_back(getValue(Record, OpNum, NextValueNo,
5221 FTy->getParamType(i)));
5222 ArgsFullTys.push_back(FullFTy->getParamType(i));
5223 if (!Args.back())
5224 return error("Invalid record");
5225 }
5226
5227 // Read type/value pairs for varargs params.
5228 if (!FTy->isVarArg()) {
5229 if (OpNum != Record.size())
5230 return error("Invalid record");
5231 } else {
5232 while (OpNum != Record.size()) {
5233 Value *Op;
5234 Type *FullTy;
5235 if (getValueTypePair(Record, OpNum, NextValueNo, Op, &FullTy))
5236 return error("Invalid record");
5237 Args.push_back(Op);
5238 ArgsFullTys.push_back(FullTy);
5239 }
5240 }
5241
5242 I = CallInst::Create(FTy, Callee, Args, OperandBundles);
5243 FullTy = FullFTy->getReturnType();
5244 OperandBundles.clear();
5245 InstructionList.push_back(I);
5246 cast<CallInst>(I)->setCallingConv(
5247 static_cast<CallingConv::ID>((0x7ff & CCInfo) >> bitc::CALL_CCONV));
5248 CallInst::TailCallKind TCK = CallInst::TCK_None;
5249 if (CCInfo & 1 << bitc::CALL_TAIL)
5250 TCK = CallInst::TCK_Tail;
5251 if (CCInfo & (1 << bitc::CALL_MUSTTAIL))
5252 TCK = CallInst::TCK_MustTail;
5253 if (CCInfo & (1 << bitc::CALL_NOTAIL))
5254 TCK = CallInst::TCK_NoTail;
5255 cast<CallInst>(I)->setTailCallKind(TCK);
5256 cast<CallInst>(I)->setAttributes(PAL);
5257 propagateByValSRetTypes(cast<CallBase>(I), ArgsFullTys);
5258 if (FMF.any()) {
5259 if (!isa<FPMathOperator>(I))
5260 return error("Fast-math-flags specified for call without "
5261 "floating-point scalar or vector return type");
5262 I->setFastMathFlags(FMF);
5263 }
5264 break;
5265 }
5266 case bitc::FUNC_CODE_INST_VAARG: { // VAARG: [valistty, valist, instty]
5267 if (Record.size() < 3)
5268 return error("Invalid record");
5269 Type *OpTy = getTypeByID(Record[0]);
5270 Value *Op = getValue(Record, 1, NextValueNo, OpTy);
5271 FullTy = getFullyStructuredTypeByID(Record[2]);
5272 Type *ResTy = flattenPointerTypes(FullTy);
5273 if (!OpTy || !Op || !ResTy)
5274 return error("Invalid record");
5275 I = new VAArgInst(Op, ResTy);
5276 InstructionList.push_back(I);
5277 break;
5278 }
5279
5280 case bitc::FUNC_CODE_OPERAND_BUNDLE: {
5281 // A call or an invoke can be optionally prefixed with some variable
5282 // number of operand bundle blocks. These blocks are read into
5283 // OperandBundles and consumed at the next call or invoke instruction.
5284
5285 if (Record.empty() || Record[0] >= BundleTags.size())
5286 return error("Invalid record");
5287
5288 std::vector<Value *> Inputs;
5289
5290 unsigned OpNum = 1;
5291 while (OpNum != Record.size()) {
5292 Value *Op;
5293 if (getValueTypePair(Record, OpNum, NextValueNo, Op))
5294 return error("Invalid record");
5295 Inputs.push_back(Op);
5296 }
5297
5298 OperandBundles.emplace_back(BundleTags[Record[0]], std::move(Inputs));
5299 continue;
5300 }
5301
5302 case bitc::FUNC_CODE_INST_FREEZE: { // FREEZE: [opty,opval]
5303 unsigned OpNum = 0;
5304 Value *Op = nullptr;
5305 if (getValueTypePair(Record, OpNum, NextValueNo, Op, &FullTy))
5306 return error("Invalid record");
5307 if (OpNum != Record.size())
5308 return error("Invalid record");
5309
5310 I = new FreezeInst(Op);
5311 InstructionList.push_back(I);
5312 break;
5313 }
5314 }
5315
5316 // Add instruction to end of current BB. If there is no current BB, reject
5317 // this file.
5318 if (!CurBB) {
5319 I->deleteValue();
5320 return error("Invalid instruction with no BB");
5321 }
5322 if (!OperandBundles.empty()) {
5323 I->deleteValue();
5324 return error("Operand bundles found with no consumer");
5325 }
5326 CurBB->getInstList().push_back(I);
5327
5328 // If this was a terminator instruction, move to the next block.
5329 if (I->isTerminator()) {
5330 ++CurBBNo;
5331 CurBB = CurBBNo < FunctionBBs.size() ? FunctionBBs[CurBBNo] : nullptr;
5332 }
5333
5334 // Non-void values get registered in the value table for future use.
5335 if (!I->getType()->isVoidTy()) {
5336 if (!FullTy) {
5337 FullTy = I->getType();
5338 assert(((!FullTy->isPointerTy() && !isa<StructType>
(FullTy) && !isa<ArrayType>(FullTy) && (
!isa<VectorType>(FullTy) || cast<VectorType>(FullTy
)->getElementType()->isFloatingPointTy() || cast<VectorType
>(FullTy)->getElementType()->isIntegerTy()) &&
"Structured types must be assigned with corresponding non-opaque "
"pointer type") ? static_cast<void> (0) : __assert_fail
("!FullTy->isPointerTy() && !isa<StructType>(FullTy) && !isa<ArrayType>(FullTy) && (!isa<VectorType>(FullTy) || cast<VectorType>(FullTy)->getElementType()->isFloatingPointTy() || cast<VectorType>(FullTy)->getElementType()->isIntegerTy()) && \"Structured types must be assigned with corresponding non-opaque \" \"pointer type\""
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 5345, __PRETTY_FUNCTION__))
5339 !FullTy->isPointerTy() && !isa<StructType>(FullTy) &&((!FullTy->isPointerTy() && !isa<StructType>
(FullTy) && !isa<ArrayType>(FullTy) && (
!isa<VectorType>(FullTy) || cast<VectorType>(FullTy
)->getElementType()->isFloatingPointTy() || cast<VectorType
>(FullTy)->getElementType()->isIntegerTy()) &&
"Structured types must be assigned with corresponding non-opaque "
"pointer type") ? static_cast<void> (0) : __assert_fail
("!FullTy->isPointerTy() && !isa<StructType>(FullTy) && !isa<ArrayType>(FullTy) && (!isa<VectorType>(FullTy) || cast<VectorType>(FullTy)->getElementType()->isFloatingPointTy() || cast<VectorType>(FullTy)->getElementType()->isIntegerTy()) && \"Structured types must be assigned with corresponding non-opaque \" \"pointer type\""
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 5345, __PRETTY_FUNCTION__))
5340 !isa<ArrayType>(FullTy) &&((!FullTy->isPointerTy() && !isa<StructType>
(FullTy) && !isa<ArrayType>(FullTy) && (
!isa<VectorType>(FullTy) || cast<VectorType>(FullTy
)->getElementType()->isFloatingPointTy() || cast<VectorType
>(FullTy)->getElementType()->isIntegerTy()) &&
"Structured types must be assigned with corresponding non-opaque "
"pointer type") ? static_cast<void> (0) : __assert_fail
("!FullTy->isPointerTy() && !isa<StructType>(FullTy) && !isa<ArrayType>(FullTy) && (!isa<VectorType>(FullTy) || cast<VectorType>(FullTy)->getElementType()->isFloatingPointTy() || cast<VectorType>(FullTy)->getElementType()->isIntegerTy()) && \"Structured types must be assigned with corresponding non-opaque \" \"pointer type\""
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 5345, __PRETTY_FUNCTION__))
5341 (!isa<VectorType>(FullTy) ||((!FullTy->isPointerTy() && !isa<StructType>
(FullTy) && !isa<ArrayType>(FullTy) && (
!isa<VectorType>(FullTy) || cast<VectorType>(FullTy
)->getElementType()->isFloatingPointTy() || cast<VectorType
>(FullTy)->getElementType()->isIntegerTy()) &&
"Structured types must be assigned with corresponding non-opaque "
"pointer type") ? static_cast<void> (0) : __assert_fail
("!FullTy->isPointerTy() && !isa<StructType>(FullTy) && !isa<ArrayType>(FullTy) && (!isa<VectorType>(FullTy) || cast<VectorType>(FullTy)->getElementType()->isFloatingPointTy() || cast<VectorType>(FullTy)->getElementType()->isIntegerTy()) && \"Structured types must be assigned with corresponding non-opaque \" \"pointer type\""
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 5345, __PRETTY_FUNCTION__))
5342 cast<VectorType>(FullTy)->getElementType()->isFloatingPointTy() ||((!FullTy->isPointerTy() && !isa<StructType>
(FullTy) && !isa<ArrayType>(FullTy) && (
!isa<VectorType>(FullTy) || cast<VectorType>(FullTy
)->getElementType()->isFloatingPointTy() || cast<VectorType
>(FullTy)->getElementType()->isIntegerTy()) &&
"Structured types must be assigned with corresponding non-opaque "
"pointer type") ? static_cast<void> (0) : __assert_fail
("!FullTy->isPointerTy() && !isa<StructType>(FullTy) && !isa<ArrayType>(FullTy) && (!isa<VectorType>(FullTy) || cast<VectorType>(FullTy)->getElementType()->isFloatingPointTy() || cast<VectorType>(FullTy)->getElementType()->isIntegerTy()) && \"Structured types must be assigned with corresponding non-opaque \" \"pointer type\""
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 5345, __PRETTY_FUNCTION__))
5343 cast<VectorType>(FullTy)->getElementType()->isIntegerTy()) &&((!FullTy->isPointerTy() && !isa<StructType>
(FullTy) && !isa<ArrayType>(FullTy) && (
!isa<VectorType>(FullTy) || cast<VectorType>(FullTy
)->getElementType()->isFloatingPointTy() || cast<VectorType
>(FullTy)->getElementType()->isIntegerTy()) &&
"Structured types must be assigned with corresponding non-opaque "
"pointer type") ? static_cast<void> (0) : __assert_fail
("!FullTy->isPointerTy() && !isa<StructType>(FullTy) && !isa<ArrayType>(FullTy) && (!isa<VectorType>(FullTy) || cast<VectorType>(FullTy)->getElementType()->isFloatingPointTy() || cast<VectorType>(FullTy)->getElementType()->isIntegerTy()) && \"Structured types must be assigned with corresponding non-opaque \" \"pointer type\""
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 5345, __PRETTY_FUNCTION__))
5344 "Structured types must be assigned with corresponding non-opaque "((!FullTy->isPointerTy() && !isa<StructType>
(FullTy) && !isa<ArrayType>(FullTy) && (
!isa<VectorType>(FullTy) || cast<VectorType>(FullTy
)->getElementType()->isFloatingPointTy() || cast<VectorType
>(FullTy)->getElementType()->isIntegerTy()) &&
"Structured types must be assigned with corresponding non-opaque "
"pointer type") ? static_cast<void> (0) : __assert_fail
("!FullTy->isPointerTy() && !isa<StructType>(FullTy) && !isa<ArrayType>(FullTy) && (!isa<VectorType>(FullTy) || cast<VectorType>(FullTy)->getElementType()->isFloatingPointTy() || cast<VectorType>(FullTy)->getElementType()->isIntegerTy()) && \"Structured types must be assigned with corresponding non-opaque \" \"pointer type\""
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 5345, __PRETTY_FUNCTION__))
5345 "pointer type")((!FullTy->isPointerTy() && !isa<StructType>
(FullTy) && !isa<ArrayType>(FullTy) && (
!isa<VectorType>(FullTy) || cast<VectorType>(FullTy
)->getElementType()->isFloatingPointTy() || cast<VectorType
>(FullTy)->getElementType()->isIntegerTy()) &&
"Structured types must be assigned with corresponding non-opaque "
"pointer type") ? static_cast<void> (0) : __assert_fail
("!FullTy->isPointerTy() && !isa<StructType>(FullTy) && !isa<ArrayType>(FullTy) && (!isa<VectorType>(FullTy) || cast<VectorType>(FullTy)->getElementType()->isFloatingPointTy() || cast<VectorType>(FullTy)->getElementType()->isIntegerTy()) && \"Structured types must be assigned with corresponding non-opaque \" \"pointer type\""
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 5345, __PRETTY_FUNCTION__))
;
5346 }
5347
5348 assert(I->getType() == flattenPointerTypes(FullTy) &&((I->getType() == flattenPointerTypes(FullTy) && "Incorrect fully structured type provided for Instruction"
) ? static_cast<void> (0) : __assert_fail ("I->getType() == flattenPointerTypes(FullTy) && \"Incorrect fully structured type provided for Instruction\""
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 5349, __PRETTY_FUNCTION__))
5349 "Incorrect fully structured type provided for Instruction")((I->getType() == flattenPointerTypes(FullTy) && "Incorrect fully structured type provided for Instruction"
) ? static_cast<void> (0) : __assert_fail ("I->getType() == flattenPointerTypes(FullTy) && \"Incorrect fully structured type provided for Instruction\""
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 5349, __PRETTY_FUNCTION__))
;
5350 ValueList.assignValue(I, NextValueNo++, FullTy);
5351 }
5352 }
5353
5354OutOfRecordLoop:
5355
5356 if (!OperandBundles.empty())
5357 return error("Operand bundles found with no consumer");
5358
5359 // Check the function list for unresolved values.
5360 if (Argument *A = dyn_cast<Argument>(ValueList.back())) {
5361 if (!A->getParent()) {
5362 // We found at least one unresolved value. Nuke them all to avoid leaks.
5363 for (unsigned i = ModuleValueListSize, e = ValueList.size(); i != e; ++i){
5364 if ((A = dyn_cast_or_null<Argument>(ValueList[i])) && !A->getParent()) {
5365 A->replaceAllUsesWith(UndefValue::get(A->getType()));
5366 delete A;
5367 }
5368 }
5369 return error("Never resolved value found in function");
5370 }
5371 }
5372
5373 // Unexpected unresolved metadata about to be dropped.
5374 if (MDLoader->hasFwdRefs())
5375 return error("Invalid function metadata: outgoing forward refs");
5376
5377 // Trim the value list down to the size it was before we parsed this function.
5378 ValueList.shrinkTo(ModuleValueListSize);
5379 MDLoader->shrinkTo(ModuleMDLoaderSize);
5380 std::vector<BasicBlock*>().swap(FunctionBBs);
5381 return Error::success();
5382}
5383
5384/// Find the function body in the bitcode stream
5385Error BitcodeReader::findFunctionInStream(
5386 Function *F,
5387 DenseMap<Function *, uint64_t>::iterator DeferredFunctionInfoIterator) {
5388 while (DeferredFunctionInfoIterator->second == 0) {
5389 // This is the fallback handling for the old format bitcode that
5390 // didn't contain the function index in the VST, or when we have
5391 // an anonymous function which would not have a VST entry.
5392 // Assert that we have one of those two cases.
5393 assert(VSTOffset == 0 || !F->hasName())((VSTOffset == 0 || !F->hasName()) ? static_cast<void>
(0) : __assert_fail ("VSTOffset == 0 || !F->hasName()", "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 5393, __PRETTY_FUNCTION__))
;
5394 // Parse the next body in the stream and set its position in the
5395 // DeferredFunctionInfo map.
5396 if (Error Err = rememberAndSkipFunctionBodies())
5397 return Err;
5398 }
5399 return Error::success();
5400}
5401
5402SyncScope::ID BitcodeReader::getDecodedSyncScopeID(unsigned Val) {
5403 if (Val == SyncScope::SingleThread || Val == SyncScope::System)
5404 return SyncScope::ID(Val);
5405 if (Val >= SSIDs.size())
5406 return SyncScope::System; // Map unknown synchronization scopes to system.
5407 return SSIDs[Val];
5408}
5409
5410//===----------------------------------------------------------------------===//
5411// GVMaterializer implementation
5412//===----------------------------------------------------------------------===//
5413
5414Error BitcodeReader::materialize(GlobalValue *GV) {
5415 Function *F = dyn_cast<Function>(GV);
5416 // If it's not a function or is already material, ignore the request.
5417 if (!F || !F->isMaterializable())
5418 return Error::success();
5419
5420 DenseMap<Function*, uint64_t>::iterator DFII = DeferredFunctionInfo.find(F);
5421 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-12~++20210124100612+2afaf072f5c1/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 5421, __PRETTY_FUNCTION__))
;
5422 // If its position is recorded as 0, its body is somewhere in the stream
5423 // but we haven't seen it yet.
5424 if (DFII->second == 0)
5425 if (Error Err = findFunctionInStream(F, DFII))
5426 return Err;
5427
5428 // Materialize metadata before parsing any function bodies.
5429 if (Error Err = materializeMetadata())
5430 return Err;
5431
5432 // Move the bit stream to the saved position of the deferred function body.
5433 if (Error JumpFailed = Stream.JumpToBit(DFII->second))
5434 return JumpFailed;
5435 if (Error Err = parseFunctionBody(F))
5436 return Err;
5437 F->setIsMaterializable(false);
5438
5439 if (StripDebugInfo)
5440 stripDebugInfo(*F);
5441
5442 // Upgrade any old intrinsic calls in the function.
5443 for (auto &I : UpgradedIntrinsics) {
5444 for (auto UI = I.first->materialized_user_begin(), UE = I.first->user_end();
5445 UI != UE;) {
5446 User *U = *UI;
5447 ++UI;
5448 if (CallInst *CI = dyn_cast<CallInst>(U))
5449 UpgradeIntrinsicCall(CI, I.second);
5450 }
5451 }
5452
5453 // Update calls to the remangled intrinsics
5454 for (auto &I : RemangledIntrinsics)
5455 for (auto UI = I.first->materialized_user_begin(), UE = I.first->user_end();
5456 UI != UE;)
5457 // Don't expect any other users than call sites
5458 cast<CallBase>(*UI++)->setCalledFunction(I.second);
5459
5460 // Finish fn->subprogram upgrade for materialized functions.
5461 if (DISubprogram *SP = MDLoader->lookupSubprogramForFunction(F))
5462 F->setSubprogram(SP);
5463
5464 // Check if the TBAA Metadata are valid, otherwise we will need to strip them.
5465 if (!MDLoader->isStrippingTBAA()) {
5466 for (auto &I : instructions(F)) {
5467 MDNode *TBAA = I.getMetadata(LLVMContext::MD_tbaa);
5468 if (!TBAA || TBAAVerifyHelper.visitTBAAMetadata(I, TBAA))
5469 continue;
5470 MDLoader->setStripTBAA(true);
5471 stripTBAA(F->getParent());
5472 }
5473 }
5474
5475 // "Upgrade" older incorrect branch weights by dropping them.
5476 for (auto &I : instructions(F)) {
5477 if (auto *MD = I.getMetadata(LLVMContext::MD_prof)) {
5478 if (MD->getOperand(0) != nullptr && isa<MDString>(MD->getOperand(0))) {
5479 MDString *MDS = cast<MDString>(MD->getOperand(0));
5480 StringRef ProfName = MDS->getString();
5481 // Check consistency of !prof branch_weights metadata.
5482 if (!ProfName.equals("branch_weights"))
5483 continue;
5484 unsigned ExpectedNumOperands = 0;
5485 if (BranchInst *BI = dyn_cast<BranchInst>(&I))
5486 ExpectedNumOperands = BI->getNumSuccessors();
5487 else if (SwitchInst *SI = dyn_cast<SwitchInst>(&I))
5488 ExpectedNumOperands = SI->getNumSuccessors();
5489 else if (isa<CallInst>(&I))
5490 ExpectedNumOperands = 1;
5491 else if (IndirectBrInst *IBI = dyn_cast<IndirectBrInst>(&I))
5492 ExpectedNumOperands = IBI->getNumDestinations();
5493 else if (isa<SelectInst>(&I))
5494 ExpectedNumOperands = 2;
5495 else
5496 continue; // ignore and continue.
5497
5498 // If branch weight doesn't match, just strip branch weight.
5499 if (MD->getNumOperands() != 1 + ExpectedNumOperands)
5500 I.setMetadata(LLVMContext::MD_prof, nullptr);
5501 }
5502 }
5503 }
5504
5505 // Look for functions that rely on old function attribute behavior.
5506 UpgradeFunctionAttributes(*F);
5507
5508 // Bring in any functions that this function forward-referenced via
5509 // blockaddresses.
5510 return materializeForwardReferencedFunctions();
5511}
5512
5513Error BitcodeReader::materializeModule() {
5514 if (Error Err = materializeMetadata())
5515 return Err;
5516
5517 // Promise to materialize all forward references.
5518 WillMaterializeAllForwardRefs = true;
5519
5520 // Iterate over the module, deserializing any functions that are still on
5521 // disk.
5522 for (Function &F : *TheModule) {
5523 if (Error Err = materialize(&F))
5524 return Err;
5525 }
5526 // At this point, if there are any function bodies, parse the rest of
5527 // the bits in the module past the last function block we have recorded
5528 // through either lazy scanning or the VST.
5529 if (LastFunctionBlockBit || NextUnreadBit)
5530 if (Error Err = parseModule(LastFunctionBlockBit > NextUnreadBit
5531 ? LastFunctionBlockBit
5532 : NextUnreadBit))
5533 return Err;
5534
5535 // Check that all block address forward references got resolved (as we
5536 // promised above).
5537 if (!BasicBlockFwdRefs.empty())
5538 return error("Never resolved function from blockaddress");
5539
5540 // Upgrade any intrinsic calls that slipped through (should not happen!) and
5541 // delete the old functions to clean up. We can't do this unless the entire
5542 // module is materialized because there could always be another function body
5543 // with calls to the old function.
5544 for (auto &I : UpgradedIntrinsics) {
5545 for (auto *U : I.first->users()) {
5546 if (CallInst *CI = dyn_cast<CallInst>(U))
5547 UpgradeIntrinsicCall(CI, I.second);
5548 }
5549 if (!I.first->use_empty())
5550 I.first->replaceAllUsesWith(I.second);
5551 I.first->eraseFromParent();
5552 }
5553 UpgradedIntrinsics.clear();
5554 // Do the same for remangled intrinsics
5555 for (auto &I : RemangledIntrinsics) {
5556 I.first->replaceAllUsesWith(I.second);
5557 I.first->eraseFromParent();
5558 }
5559 RemangledIntrinsics.clear();
5560
5561 UpgradeDebugInfo(*TheModule);
5562
5563 UpgradeModuleFlags(*TheModule);
5564
5565 UpgradeARCRuntime(*TheModule);
5566
5567 return Error::success();
5568}
5569
5570std::vector<StructType *> BitcodeReader::getIdentifiedStructTypes() const {
5571 return IdentifiedStructTypes;
5572}
5573
5574ModuleSummaryIndexBitcodeReader::ModuleSummaryIndexBitcodeReader(
5575 BitstreamCursor Cursor, StringRef Strtab, ModuleSummaryIndex &TheIndex,
5576 StringRef ModulePath, unsigned ModuleId)
5577 : BitcodeReaderBase(std::move(Cursor), Strtab), TheIndex(TheIndex),
5578 ModulePath(ModulePath), ModuleId(ModuleId) {}
5579
5580void ModuleSummaryIndexBitcodeReader::addThisModule() {
5581 TheIndex.addModule(ModulePath, ModuleId);
5582}
5583
5584ModuleSummaryIndex::ModuleInfo *
5585ModuleSummaryIndexBitcodeReader::getThisModule() {
5586 return TheIndex.getModule(ModulePath);
5587}
5588
5589std::pair<ValueInfo, GlobalValue::GUID>
5590ModuleSummaryIndexBitcodeReader::getValueInfoFromValueId(unsigned ValueId) {
5591 auto VGI = ValueIdToValueInfoMap[ValueId];
5592 assert(VGI.first)((VGI.first) ? static_cast<void> (0) : __assert_fail ("VGI.first"
, "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 5592, __PRETTY_FUNCTION__))
;
5593 return VGI;
5594}
5595
5596void ModuleSummaryIndexBitcodeReader::setValueGUID(
5597 uint64_t ValueID, StringRef ValueName, GlobalValue::LinkageTypes Linkage,
5598 StringRef SourceFileName) {
5599 std::string GlobalId =
5600 GlobalValue::getGlobalIdentifier(ValueName, Linkage, SourceFileName);
5601 auto ValueGUID = GlobalValue::getGUID(GlobalId);
5602 auto OriginalNameID = ValueGUID;
5603 if (GlobalValue::isLocalLinkage(Linkage))
5604 OriginalNameID = GlobalValue::getGUID(ValueName);
5605 if (PrintSummaryGUIDs)
5606 dbgs() << "GUID " << ValueGUID << "(" << OriginalNameID << ") is "
5607 << ValueName << "\n";
5608
5609 // UseStrtab is false for legacy summary formats and value names are
5610 // created on stack. In that case we save the name in a string saver in
5611 // the index so that the value name can be recorded.
5612 ValueIdToValueInfoMap[ValueID] = std::make_pair(
5613 TheIndex.getOrInsertValueInfo(
5614 ValueGUID,
5615 UseStrtab ? ValueName : TheIndex.saveString(ValueName)),
5616 OriginalNameID);
5617}
5618
5619// Specialized value symbol table parser used when reading module index
5620// blocks where we don't actually create global values. The parsed information
5621// is saved in the bitcode reader for use when later parsing summaries.
5622Error ModuleSummaryIndexBitcodeReader::parseValueSymbolTable(
5623 uint64_t Offset,
5624 DenseMap<unsigned, GlobalValue::LinkageTypes> &ValueIdToLinkageMap) {
5625 // With a strtab the VST is not required to parse the summary.
5626 if (UseStrtab)
5627 return Error::success();
5628
5629 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-12~++20210124100612+2afaf072f5c1/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 5629, __PRETTY_FUNCTION__))
;
5630 Expected<uint64_t> MaybeCurrentBit = jumpToValueSymbolTable(Offset, Stream);
5631 if (!MaybeCurrentBit)
5632 return MaybeCurrentBit.takeError();
5633 uint64_t CurrentBit = MaybeCurrentBit.get();
5634
5635 if (Error Err = Stream.EnterSubBlock(bitc::VALUE_SYMTAB_BLOCK_ID))
5636 return Err;
5637
5638 SmallVector<uint64_t, 64> Record;
5639
5640 // Read all the records for this value table.
5641 SmallString<128> ValueName;
5642
5643 while (true) {
5644 Expected<BitstreamEntry> MaybeEntry = Stream.advanceSkippingSubblocks();
5645 if (!MaybeEntry)
5646 return MaybeEntry.takeError();
5647 BitstreamEntry Entry = MaybeEntry.get();
5648
5649 switch (Entry.Kind) {
5650 case BitstreamEntry::SubBlock: // Handled for us already.
5651 case BitstreamEntry::Error:
5652 return error("Malformed block");
5653 case BitstreamEntry::EndBlock:
5654 // Done parsing VST, jump back to wherever we came from.
5655 if (Error JumpFailed = Stream.JumpToBit(CurrentBit))
5656 return JumpFailed;
5657 return Error::success();
5658 case BitstreamEntry::Record:
5659 // The interesting case.
5660 break;
5661 }
5662
5663 // Read a record.
5664 Record.clear();
5665 Expected<unsigned> MaybeRecord = Stream.readRecord(Entry.ID, Record);
5666 if (!MaybeRecord)
5667 return MaybeRecord.takeError();
5668 switch (MaybeRecord.get()) {
5669 default: // Default behavior: ignore (e.g. VST_CODE_BBENTRY records).
5670 break;
5671 case bitc::VST_CODE_ENTRY: { // VST_CODE_ENTRY: [valueid, namechar x N]
5672 if (convertToString(Record, 1, ValueName))
5673 return error("Invalid record");
5674 unsigned ValueID = Record[0];
5675 assert(!SourceFileName.empty())((!SourceFileName.empty()) ? static_cast<void> (0) : __assert_fail
("!SourceFileName.empty()", "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 5675, __PRETTY_FUNCTION__))
;
5676 auto VLI = ValueIdToLinkageMap.find(ValueID);
5677 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-12~++20210124100612+2afaf072f5c1/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 5678, __PRETTY_FUNCTION__))
5678 "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-12~++20210124100612+2afaf072f5c1/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 5678, __PRETTY_FUNCTION__))
;
5679 auto Linkage = VLI->second;
5680 setValueGUID(ValueID, ValueName, Linkage, SourceFileName);
5681 ValueName.clear();
5682 break;
5683 }
5684 case bitc::VST_CODE_FNENTRY: {
5685 // VST_CODE_FNENTRY: [valueid, offset, namechar x N]
5686 if (convertToString(Record, 2, ValueName))
5687 return error("Invalid record");
5688 unsigned ValueID = Record[0];
5689 assert(!SourceFileName.empty())((!SourceFileName.empty()) ? static_cast<void> (0) : __assert_fail
("!SourceFileName.empty()", "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 5689, __PRETTY_FUNCTION__))
;
5690 auto VLI = ValueIdToLinkageMap.find(ValueID);
5691 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-12~++20210124100612+2afaf072f5c1/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 5692, __PRETTY_FUNCTION__))
5692 "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-12~++20210124100612+2afaf072f5c1/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 5692, __PRETTY_FUNCTION__))
;
5693 auto Linkage = VLI->second;
5694 setValueGUID(ValueID, ValueName, Linkage, SourceFileName);
5695 ValueName.clear();
5696 break;
5697 }
5698 case bitc::VST_CODE_COMBINED_ENTRY: {
5699 // VST_CODE_COMBINED_ENTRY: [valueid, refguid]
5700 unsigned ValueID = Record[0];
5701 GlobalValue::GUID RefGUID = Record[1];
5702 // The "original name", which is the second value of the pair will be
5703 // overriden later by a FS_COMBINED_ORIGINAL_NAME in the combined index.
5704 ValueIdToValueInfoMap[ValueID] =
5705 std::make_pair(TheIndex.getOrInsertValueInfo(RefGUID), RefGUID);
5706 break;
5707 }
5708 }
5709 }
5710}
5711
5712// Parse just the blocks needed for building the index out of the module.
5713// At the end of this routine the module Index is populated with a map
5714// from global value id to GlobalValueSummary objects.
5715Error ModuleSummaryIndexBitcodeReader::parseModule() {
5716 if (Error Err = Stream.EnterSubBlock(bitc::MODULE_BLOCK_ID))
5717 return Err;
5718
5719 SmallVector<uint64_t, 64> Record;
5720 DenseMap<unsigned, GlobalValue::LinkageTypes> ValueIdToLinkageMap;
5721 unsigned ValueId = 0;
5722
5723 // Read the index for this module.
5724 while (true) {
5725 Expected<llvm::BitstreamEntry> MaybeEntry = Stream.advance();
5726 if (!MaybeEntry)
5727 return MaybeEntry.takeError();
5728 llvm::BitstreamEntry Entry = MaybeEntry.get();
5729
5730 switch (Entry.Kind) {
5731 case BitstreamEntry::Error:
5732 return error("Malformed block");
5733 case BitstreamEntry::EndBlock:
5734 return Error::success();
5735
5736 case BitstreamEntry::SubBlock:
5737 switch (Entry.ID) {
5738 default: // Skip unknown content.
5739 if (Error Err = Stream.SkipBlock())
5740 return Err;
5741 break;
5742 case bitc::BLOCKINFO_BLOCK_ID:
5743 // Need to parse these to get abbrev ids (e.g. for VST)
5744 if (readBlockInfo())
5745 return error("Malformed block");
5746 break;
5747 case bitc::VALUE_SYMTAB_BLOCK_ID:
5748 // Should have been parsed earlier via VSTOffset, unless there
5749 // is no summary section.
5750 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-12~++20210124100612+2afaf072f5c1/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 5752, __PRETTY_FUNCTION__))
5751 !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-12~++20210124100612+2afaf072f5c1/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 5752, __PRETTY_FUNCTION__))
5752 "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-12~++20210124100612+2afaf072f5c1/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 5752, __PRETTY_FUNCTION__))
;
5753 if (Error Err = Stream.SkipBlock())
5754 return Err;
5755 break;
5756 case bitc::GLOBALVAL_SUMMARY_BLOCK_ID:
5757 case bitc::FULL_LTO_GLOBALVAL_SUMMARY_BLOCK_ID:
5758 // Add the module if it is a per-module index (has a source file name).
5759 if (!SourceFileName.empty())
5760 addThisModule();
5761 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-12~++20210124100612+2afaf072f5c1/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 5762, __PRETTY_FUNCTION__))
5762 "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-12~++20210124100612+2afaf072f5c1/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 5762, __PRETTY_FUNCTION__))
;
5763 // We might not have a VST if there were no values in the
5764 // summary. An empty summary block generated when we are
5765 // performing ThinLTO compiles so we don't later invoke
5766 // the regular LTO process on them.
5767 if (VSTOffset > 0) {
5768 if (Error Err = parseValueSymbolTable(VSTOffset, ValueIdToLinkageMap))
5769 return Err;
5770 SeenValueSymbolTable = true;
5771 }
5772 SeenGlobalValSummary = true;
5773 if (Error Err = parseEntireSummary(Entry.ID))
5774 return Err;
5775 break;
5776 case bitc::MODULE_STRTAB_BLOCK_ID:
5777 if (Error Err = parseModuleStringTable())
5778 return Err;
5779 break;
5780 }
5781 continue;
5782
5783 case BitstreamEntry::Record: {
5784 Record.clear();
5785 Expected<unsigned> MaybeBitCode = Stream.readRecord(Entry.ID, Record);
5786 if (!MaybeBitCode)
5787 return MaybeBitCode.takeError();
5788 switch (MaybeBitCode.get()) {
5789 default:
5790 break; // Default behavior, ignore unknown content.
5791 case bitc::MODULE_CODE_VERSION: {
5792 if (Error Err = parseVersionRecord(Record).takeError())
5793 return Err;
5794 break;
5795 }
5796 /// MODULE_CODE_SOURCE_FILENAME: [namechar x N]
5797 case bitc::MODULE_CODE_SOURCE_FILENAME: {
5798 SmallString<128> ValueName;
5799 if (convertToString(Record, 0, ValueName))
5800 return error("Invalid record");
5801 SourceFileName = ValueName.c_str();
5802 break;
5803 }
5804 /// MODULE_CODE_HASH: [5*i32]
5805 case bitc::MODULE_CODE_HASH: {
5806 if (Record.size() != 5)
5807 return error("Invalid hash length " + Twine(Record.size()).str());
5808 auto &Hash = getThisModule()->second.second;
5809 int Pos = 0;
5810 for (auto &Val : Record) {
5811 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-12~++20210124100612+2afaf072f5c1/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 5811, __PRETTY_FUNCTION__))
;
5812 Hash[Pos++] = Val;
5813 }
5814 break;
5815 }
5816 /// MODULE_CODE_VSTOFFSET: [offset]
5817 case bitc::MODULE_CODE_VSTOFFSET:
5818 if (Record.empty())
5819 return error("Invalid record");
5820 // Note that we subtract 1 here because the offset is relative to one
5821 // word before the start of the identification or module block, which
5822 // was historically always the start of the regular bitcode header.
5823 VSTOffset = Record[0] - 1;
5824 break;
5825 // v1 GLOBALVAR: [pointer type, isconst, initid, linkage, ...]
5826 // v1 FUNCTION: [type, callingconv, isproto, linkage, ...]
5827 // v1 ALIAS: [alias type, addrspace, aliasee val#, linkage, ...]
5828 // v2: [strtab offset, strtab size, v1]
5829 case bitc::MODULE_CODE_GLOBALVAR:
5830 case bitc::MODULE_CODE_FUNCTION:
5831 case bitc::MODULE_CODE_ALIAS: {
5832 StringRef Name;
5833 ArrayRef<uint64_t> GVRecord;
5834 std::tie(Name, GVRecord) = readNameFromStrtab(Record);
5835 if (GVRecord.size() <= 3)
5836 return error("Invalid record");
5837 uint64_t RawLinkage = GVRecord[3];
5838 GlobalValue::LinkageTypes Linkage = getDecodedLinkage(RawLinkage);
5839 if (!UseStrtab) {
5840 ValueIdToLinkageMap[ValueId++] = Linkage;
5841 break;
5842 }
5843
5844 setValueGUID(ValueId++, Name, Linkage, SourceFileName);
5845 break;
5846 }
5847 }
5848 }
5849 continue;
5850 }
5851 }
5852}
5853
5854std::vector<ValueInfo>
5855ModuleSummaryIndexBitcodeReader::makeRefList(ArrayRef<uint64_t> Record) {
5856 std::vector<ValueInfo> Ret;
5857 Ret.reserve(Record.size());
5858 for (uint64_t RefValueId : Record)
5859 Ret.push_back(getValueInfoFromValueId(RefValueId).first);
5860 return Ret;
5861}
5862
5863std::vector<FunctionSummary::EdgeTy>
5864ModuleSummaryIndexBitcodeReader::makeCallList(ArrayRef<uint64_t> Record,
5865 bool IsOldProfileFormat,
5866 bool HasProfile, bool HasRelBF) {
5867 std::vector<FunctionSummary::EdgeTy> Ret;
5868 Ret.reserve(Record.size());
5869 for (unsigned I = 0, E = Record.size(); I != E; ++I) {
5870 CalleeInfo::HotnessType Hotness = CalleeInfo::HotnessType::Unknown;
5871 uint64_t RelBF = 0;
5872 ValueInfo Callee = getValueInfoFromValueId(Record[I]).first;
5873 if (IsOldProfileFormat) {
5874 I += 1; // Skip old callsitecount field
5875 if (HasProfile)
5876 I += 1; // Skip old profilecount field
5877 } else if (HasProfile)
5878 Hotness = static_cast<CalleeInfo::HotnessType>(Record[++I]);
5879 else if (HasRelBF)
5880 RelBF = Record[++I];
5881 Ret.push_back(FunctionSummary::EdgeTy{Callee, CalleeInfo(Hotness, RelBF)});
5882 }
5883 return Ret;
5884}
5885
5886static void
5887parseWholeProgramDevirtResolutionByArg(ArrayRef<uint64_t> Record, size_t &Slot,
5888 WholeProgramDevirtResolution &Wpd) {
5889 uint64_t ArgNum = Record[Slot++];
5890 WholeProgramDevirtResolution::ByArg &B =
5891 Wpd.ResByArg[{Record.begin() + Slot, Record.begin() + Slot + ArgNum}];
5892 Slot += ArgNum;
5893
5894 B.TheKind =
5895 static_cast<WholeProgramDevirtResolution::ByArg::Kind>(Record[Slot++]);
5896 B.Info = Record[Slot++];
5897 B.Byte = Record[Slot++];
5898 B.Bit = Record[Slot++];
5899}
5900
5901static void parseWholeProgramDevirtResolution(ArrayRef<uint64_t> Record,
5902 StringRef Strtab, size_t &Slot,
5903 TypeIdSummary &TypeId) {
5904 uint64_t Id = Record[Slot++];
5905 WholeProgramDevirtResolution &Wpd = TypeId.WPDRes[Id];
5906
5907 Wpd.TheKind = static_cast<WholeProgramDevirtResolution::Kind>(Record[Slot++]);
5908 Wpd.SingleImplName = {Strtab.data() + Record[Slot],
5909 static_cast<size_t>(Record[Slot + 1])};
5910 Slot += 2;
5911
5912 uint64_t ResByArgNum = Record[Slot++];
5913 for (uint64_t I = 0; I != ResByArgNum; ++I)
5914 parseWholeProgramDevirtResolutionByArg(Record, Slot, Wpd);
5915}
5916
5917static void parseTypeIdSummaryRecord(ArrayRef<uint64_t> Record,
5918 StringRef Strtab,
5919 ModuleSummaryIndex &TheIndex) {
5920 size_t Slot = 0;
5921 TypeIdSummary &TypeId = TheIndex.getOrInsertTypeIdSummary(
5922 {Strtab.data() + Record[Slot], static_cast<size_t>(Record[Slot + 1])});
5923 Slot += 2;
5924
5925 TypeId.TTRes.TheKind = static_cast<TypeTestResolution::Kind>(Record[Slot++]);
5926 TypeId.TTRes.SizeM1BitWidth = Record[Slot++];
5927 TypeId.TTRes.AlignLog2 = Record[Slot++];
5928 TypeId.TTRes.SizeM1 = Record[Slot++];
5929 TypeId.TTRes.BitMask = Record[Slot++];
5930 TypeId.TTRes.InlineBits = Record[Slot++];
5931
5932 while (Slot < Record.size())
5933 parseWholeProgramDevirtResolution(Record, Strtab, Slot, TypeId);
5934}
5935
5936std::vector<FunctionSummary::ParamAccess>
5937ModuleSummaryIndexBitcodeReader::parseParamAccesses(ArrayRef<uint64_t> Record) {
5938 auto ReadRange = [&]() {
5939 APInt Lower(FunctionSummary::ParamAccess::RangeWidth,
5940 BitcodeReader::decodeSignRotatedValue(Record.front()));
5941 Record = Record.drop_front();
5942 APInt Upper(FunctionSummary::ParamAccess::RangeWidth,
5943 BitcodeReader::decodeSignRotatedValue(Record.front()));
5944 Record = Record.drop_front();
5945 ConstantRange Range{Lower, Upper};
5946 assert(!Range.isFullSet())((!Range.isFullSet()) ? static_cast<void> (0) : __assert_fail
("!Range.isFullSet()", "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 5946, __PRETTY_FUNCTION__))
;
5947 assert(!Range.isUpperSignWrapped())((!Range.isUpperSignWrapped()) ? static_cast<void> (0) :
__assert_fail ("!Range.isUpperSignWrapped()", "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 5947, __PRETTY_FUNCTION__))
;
5948 return Range;
5949 };
5950
5951 std::vector<FunctionSummary::ParamAccess> PendingParamAccesses;
5952 while (!Record.empty()) {
5953 PendingParamAccesses.emplace_back();
5954 FunctionSummary::ParamAccess &ParamAccess = PendingParamAccesses.back();
5955 ParamAccess.ParamNo = Record.front();
5956 Record = Record.drop_front();
5957 ParamAccess.Use = ReadRange();
5958 ParamAccess.Calls.resize(Record.front());
5959 Record = Record.drop_front();
5960 for (auto &Call : ParamAccess.Calls) {
5961 Call.ParamNo = Record.front();
5962 Record = Record.drop_front();
5963 Call.Callee = getValueInfoFromValueId(Record.front()).first;
5964 Record = Record.drop_front();
5965 Call.Offsets = ReadRange();
5966 }
5967 }
5968 return PendingParamAccesses;
5969}
5970
5971void ModuleSummaryIndexBitcodeReader::parseTypeIdCompatibleVtableInfo(
5972 ArrayRef<uint64_t> Record, size_t &Slot,
5973 TypeIdCompatibleVtableInfo &TypeId) {