Bug Summary

File:llvm/lib/Bitcode/Reader/BitcodeReader.cpp
Warning:line 4942, column 9
Called C++ object pointer is null

Annotated Source Code

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clang -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 -mthread-model posix -mframe-pointer=none -fmath-errno -fno-rounding-math -masm-verbose -mconstructor-aliases -munwind-tables -target-cpu x86-64 -dwarf-column-info -fno-split-dwarf-inlining -debugger-tuning=gdb -ffunction-sections -fdata-sections -resource-dir /usr/lib/llvm-10/lib/clang/10.0.0 -D _DEBUG -D _GNU_SOURCE -D __STDC_CONSTANT_MACROS -D __STDC_FORMAT_MACROS -D __STDC_LIMIT_MACROS -I /build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/build-llvm/lib/Bitcode/Reader -I /build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/llvm/lib/Bitcode/Reader -I /build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/build-llvm/include -I /build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/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-10/lib/clang/10.0.0/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-10~++20200112100611+7fa5290d5bd/build-llvm/lib/Bitcode/Reader -fdebug-prefix-map=/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd=. -ferror-limit 19 -fmessage-length 0 -fvisibility-inlines-hidden -stack-protector 2 -fgnuc-version=4.2.1 -fobjc-runtime=gcc -fdiagnostics-show-option -vectorize-loops -vectorize-slp -analyzer-output=html -analyzer-config stable-report-filename=true -faddrsig -o /tmp/scan-build-2020-01-13-084841-49055-1 -x c++ /build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/llvm/lib/Bitcode/Reader/BitcodeReader.cpp

/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/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/Bitstream/BitstreamReader.h"
24#include "llvm/Bitcode/LLVMBitCodes.h"
25#include "llvm/Config/llvm-config.h"
26#include "llvm/IR/Argument.h"
27#include "llvm/IR/Attributes.h"
28#include "llvm/IR/AutoUpgrade.h"
29#include "llvm/IR/BasicBlock.h"
30#include "llvm/IR/CallSite.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 for (unsigned i = Idx, e = Record.size(); i != e; ++i)
157 Result += (char)Record[i];
158 return false;
159}
160
161// Strip all the TBAA attachment for the module.
162static void stripTBAA(Module *M) {
163 for (auto &F : *M) {
164 if (F.isMaterializable())
165 continue;
166 for (auto &I : instructions(F))
167 I.setMetadata(LLVMContext::MD_tbaa, nullptr);
168 }
169}
170
171/// Read the "IDENTIFICATION_BLOCK_ID" block, do some basic enforcement on the
172/// "epoch" encoded in the bitcode, and return the producer name if any.
173static Expected<std::string> readIdentificationBlock(BitstreamCursor &Stream) {
174 if (Error Err = Stream.EnterSubBlock(bitc::IDENTIFICATION_BLOCK_ID))
175 return std::move(Err);
176
177 // Read all the records.
178 SmallVector<uint64_t, 64> Record;
179
180 std::string ProducerIdentification;
181
182 while (true) {
183 BitstreamEntry Entry;
184 if (Expected<BitstreamEntry> Res = Stream.advance())
185 Entry = Res.get();
186 else
187 return Res.takeError();
188
189 switch (Entry.Kind) {
190 default:
191 case BitstreamEntry::Error:
192 return error("Malformed block");
193 case BitstreamEntry::EndBlock:
194 return ProducerIdentification;
195 case BitstreamEntry::Record:
196 // The interesting case.
197 break;
198 }
199
200 // Read a record.
201 Record.clear();
202 Expected<unsigned> MaybeBitCode = Stream.readRecord(Entry.ID, Record);
203 if (!MaybeBitCode)
204 return MaybeBitCode.takeError();
205 switch (MaybeBitCode.get()) {
206 default: // Default behavior: reject
207 return error("Invalid value");
208 case bitc::IDENTIFICATION_CODE_STRING: // IDENTIFICATION: [strchr x N]
209 convertToString(Record, 0, ProducerIdentification);
210 break;
211 case bitc::IDENTIFICATION_CODE_EPOCH: { // EPOCH: [epoch#]
212 unsigned epoch = (unsigned)Record[0];
213 if (epoch != bitc::BITCODE_CURRENT_EPOCH) {
214 return error(
215 Twine("Incompatible epoch: Bitcode '") + Twine(epoch) +
216 "' vs current: '" + Twine(bitc::BITCODE_CURRENT_EPOCH) + "'");
217 }
218 }
219 }
220 }
221}
222
223static Expected<std::string> readIdentificationCode(BitstreamCursor &Stream) {
224 // We expect a number of well-defined blocks, though we don't necessarily
225 // need to understand them all.
226 while (true) {
227 if (Stream.AtEndOfStream())
228 return "";
229
230 BitstreamEntry Entry;
231 if (Expected<BitstreamEntry> Res = Stream.advance())
232 Entry = std::move(Res.get());
233 else
234 return Res.takeError();
235
236 switch (Entry.Kind) {
237 case BitstreamEntry::EndBlock:
238 case BitstreamEntry::Error:
239 return error("Malformed block");
240
241 case BitstreamEntry::SubBlock:
242 if (Entry.ID == bitc::IDENTIFICATION_BLOCK_ID)
243 return readIdentificationBlock(Stream);
244
245 // Ignore other sub-blocks.
246 if (Error Err = Stream.SkipBlock())
247 return std::move(Err);
248 continue;
249 case BitstreamEntry::Record:
250 if (Expected<unsigned> Skipped = Stream.skipRecord(Entry.ID))
251 continue;
252 else
253 return Skipped.takeError();
254 }
255 }
256}
257
258static Expected<bool> hasObjCCategoryInModule(BitstreamCursor &Stream) {
259 if (Error Err = Stream.EnterSubBlock(bitc::MODULE_BLOCK_ID))
260 return std::move(Err);
261
262 SmallVector<uint64_t, 64> Record;
263 // Read all the records for this module.
264
265 while (true) {
266 Expected<BitstreamEntry> MaybeEntry = Stream.advanceSkippingSubblocks();
267 if (!MaybeEntry)
268 return MaybeEntry.takeError();
269 BitstreamEntry Entry = MaybeEntry.get();
270
271 switch (Entry.Kind) {
272 case BitstreamEntry::SubBlock: // Handled for us already.
273 case BitstreamEntry::Error:
274 return error("Malformed block");
275 case BitstreamEntry::EndBlock:
276 return false;
277 case BitstreamEntry::Record:
278 // The interesting case.
279 break;
280 }
281
282 // Read a record.
283 Expected<unsigned> MaybeRecord = Stream.readRecord(Entry.ID, Record);
284 if (!MaybeRecord)
285 return MaybeRecord.takeError();
286 switch (MaybeRecord.get()) {
287 default:
288 break; // Default behavior, ignore unknown content.
289 case bitc::MODULE_CODE_SECTIONNAME: { // SECTIONNAME: [strchr x N]
290 std::string S;
291 if (convertToString(Record, 0, S))
292 return error("Invalid record");
293 // Check for the i386 and other (x86_64, ARM) conventions
294 if (S.find("__DATA,__objc_catlist") != std::string::npos ||
295 S.find("__OBJC,__category") != std::string::npos)
296 return true;
297 break;
298 }
299 }
300 Record.clear();
301 }
302 llvm_unreachable("Exit infinite loop")::llvm::llvm_unreachable_internal("Exit infinite loop", "/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 302)
;
303}
304
305static Expected<bool> hasObjCCategory(BitstreamCursor &Stream) {
306 // We expect a number of well-defined blocks, though we don't necessarily
307 // need to understand them all.
308 while (true) {
309 BitstreamEntry Entry;
310 if (Expected<BitstreamEntry> Res = Stream.advance())
311 Entry = std::move(Res.get());
312 else
313 return Res.takeError();
314
315 switch (Entry.Kind) {
316 case BitstreamEntry::Error:
317 return error("Malformed block");
318 case BitstreamEntry::EndBlock:
319 return false;
320
321 case BitstreamEntry::SubBlock:
322 if (Entry.ID == bitc::MODULE_BLOCK_ID)
323 return hasObjCCategoryInModule(Stream);
324
325 // Ignore other sub-blocks.
326 if (Error Err = Stream.SkipBlock())
327 return std::move(Err);
328 continue;
329
330 case BitstreamEntry::Record:
331 if (Expected<unsigned> Skipped = Stream.skipRecord(Entry.ID))
332 continue;
333 else
334 return Skipped.takeError();
335 }
336 }
337}
338
339static Expected<std::string> readModuleTriple(BitstreamCursor &Stream) {
340 if (Error Err = Stream.EnterSubBlock(bitc::MODULE_BLOCK_ID))
341 return std::move(Err);
342
343 SmallVector<uint64_t, 64> Record;
344
345 std::string Triple;
346
347 // Read all the records for this module.
348 while (true) {
349 Expected<BitstreamEntry> MaybeEntry = Stream.advanceSkippingSubblocks();
350 if (!MaybeEntry)
351 return MaybeEntry.takeError();
352 BitstreamEntry Entry = MaybeEntry.get();
353
354 switch (Entry.Kind) {
355 case BitstreamEntry::SubBlock: // Handled for us already.
356 case BitstreamEntry::Error:
357 return error("Malformed block");
358 case BitstreamEntry::EndBlock:
359 return Triple;
360 case BitstreamEntry::Record:
361 // The interesting case.
362 break;
363 }
364
365 // Read a record.
366 Expected<unsigned> MaybeRecord = Stream.readRecord(Entry.ID, Record);
367 if (!MaybeRecord)
368 return MaybeRecord.takeError();
369 switch (MaybeRecord.get()) {
370 default: break; // Default behavior, ignore unknown content.
371 case bitc::MODULE_CODE_TRIPLE: { // TRIPLE: [strchr x N]
372 std::string S;
373 if (convertToString(Record, 0, S))
374 return error("Invalid record");
375 Triple = S;
376 break;
377 }
378 }
379 Record.clear();
380 }
381 llvm_unreachable("Exit infinite loop")::llvm::llvm_unreachable_internal("Exit infinite loop", "/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 381)
;
382}
383
384static Expected<std::string> readTriple(BitstreamCursor &Stream) {
385 // We expect a number of well-defined blocks, though we don't necessarily
386 // need to understand them all.
387 while (true) {
388 Expected<BitstreamEntry> MaybeEntry = Stream.advance();
389 if (!MaybeEntry)
390 return MaybeEntry.takeError();
391 BitstreamEntry Entry = MaybeEntry.get();
392
393 switch (Entry.Kind) {
394 case BitstreamEntry::Error:
395 return error("Malformed block");
396 case BitstreamEntry::EndBlock:
397 return "";
398
399 case BitstreamEntry::SubBlock:
400 if (Entry.ID == bitc::MODULE_BLOCK_ID)
401 return readModuleTriple(Stream);
402
403 // Ignore other sub-blocks.
404 if (Error Err = Stream.SkipBlock())
405 return std::move(Err);
406 continue;
407
408 case BitstreamEntry::Record:
409 if (llvm::Expected<unsigned> Skipped = Stream.skipRecord(Entry.ID))
410 continue;
411 else
412 return Skipped.takeError();
413 }
414 }
415}
416
417namespace {
418
419class BitcodeReaderBase {
420protected:
421 BitcodeReaderBase(BitstreamCursor Stream, StringRef Strtab)
422 : Stream(std::move(Stream)), Strtab(Strtab) {
423 this->Stream.setBlockInfo(&BlockInfo);
424 }
425
426 BitstreamBlockInfo BlockInfo;
427 BitstreamCursor Stream;
428 StringRef Strtab;
429
430 /// In version 2 of the bitcode we store names of global values and comdats in
431 /// a string table rather than in the VST.
432 bool UseStrtab = false;
433
434 Expected<unsigned> parseVersionRecord(ArrayRef<uint64_t> Record);
435
436 /// If this module uses a string table, pop the reference to the string table
437 /// and return the referenced string and the rest of the record. Otherwise
438 /// just return the record itself.
439 std::pair<StringRef, ArrayRef<uint64_t>>
440 readNameFromStrtab(ArrayRef<uint64_t> Record);
441
442 bool readBlockInfo();
443
444 // Contains an arbitrary and optional string identifying the bitcode producer
445 std::string ProducerIdentification;
446
447 Error error(const Twine &Message);
448};
449
450} // end anonymous namespace
451
452Error BitcodeReaderBase::error(const Twine &Message) {
453 std::string FullMsg = Message.str();
454 if (!ProducerIdentification.empty())
455 FullMsg += " (Producer: '" + ProducerIdentification + "' Reader: 'LLVM " +
456 LLVM_VERSION_STRING"10.0.0" "')";
457 return ::error(FullMsg);
458}
459
460Expected<unsigned>
461BitcodeReaderBase::parseVersionRecord(ArrayRef<uint64_t> Record) {
462 if (Record.empty())
463 return error("Invalid record");
464 unsigned ModuleVersion = Record[0];
465 if (ModuleVersion > 2)
466 return error("Invalid value");
467 UseStrtab = ModuleVersion >= 2;
468 return ModuleVersion;
469}
470
471std::pair<StringRef, ArrayRef<uint64_t>>
472BitcodeReaderBase::readNameFromStrtab(ArrayRef<uint64_t> Record) {
473 if (!UseStrtab)
474 return {"", Record};
475 // Invalid reference. Let the caller complain about the record being empty.
476 if (Record[0] + Record[1] > Strtab.size())
477 return {"", {}};
478 return {StringRef(Strtab.data() + Record[0], Record[1]), Record.slice(2)};
479}
480
481namespace {
482
483class BitcodeReader : public BitcodeReaderBase, public GVMaterializer {
484 LLVMContext &Context;
485 Module *TheModule = nullptr;
486 // Next offset to start scanning for lazy parsing of function bodies.
487 uint64_t NextUnreadBit = 0;
488 // Last function offset found in the VST.
489 uint64_t LastFunctionBlockBit = 0;
490 bool SeenValueSymbolTable = false;
491 uint64_t VSTOffset = 0;
492
493 std::vector<std::string> SectionTable;
494 std::vector<std::string> GCTable;
495
496 std::vector<Type*> TypeList;
497 DenseMap<Function *, FunctionType *> FunctionTypes;
498 BitcodeReaderValueList ValueList;
499 Optional<MetadataLoader> MDLoader;
500 std::vector<Comdat *> ComdatList;
501 SmallVector<Instruction *, 64> InstructionList;
502
503 std::vector<std::pair<GlobalVariable *, unsigned>> GlobalInits;
504 std::vector<std::pair<GlobalIndirectSymbol *, unsigned>> IndirectSymbolInits;
505 std::vector<std::pair<Function *, unsigned>> FunctionPrefixes;
506 std::vector<std::pair<Function *, unsigned>> FunctionPrologues;
507 std::vector<std::pair<Function *, unsigned>> FunctionPersonalityFns;
508
509 /// The set of attributes by index. Index zero in the file is for null, and
510 /// is thus not represented here. As such all indices are off by one.
511 std::vector<AttributeList> MAttributes;
512
513 /// The set of attribute groups.
514 std::map<unsigned, AttributeList> MAttributeGroups;
515
516 /// While parsing a function body, this is a list of the basic blocks for the
517 /// function.
518 std::vector<BasicBlock*> FunctionBBs;
519
520 // When reading the module header, this list is populated with functions that
521 // have bodies later in the file.
522 std::vector<Function*> FunctionsWithBodies;
523
524 // When intrinsic functions are encountered which require upgrading they are
525 // stored here with their replacement function.
526 using UpdatedIntrinsicMap = DenseMap<Function *, Function *>;
527 UpdatedIntrinsicMap UpgradedIntrinsics;
528 // Intrinsics which were remangled because of types rename
529 UpdatedIntrinsicMap RemangledIntrinsics;
530
531 // Several operations happen after the module header has been read, but
532 // before function bodies are processed. This keeps track of whether
533 // we've done this yet.
534 bool SeenFirstFunctionBody = false;
535
536 /// When function bodies are initially scanned, this map contains info about
537 /// where to find deferred function body in the stream.
538 DenseMap<Function*, uint64_t> DeferredFunctionInfo;
539
540 /// When Metadata block is initially scanned when parsing the module, we may
541 /// choose to defer parsing of the metadata. This vector contains info about
542 /// which Metadata blocks are deferred.
543 std::vector<uint64_t> DeferredMetadataInfo;
544
545 /// These are basic blocks forward-referenced by block addresses. They are
546 /// inserted lazily into functions when they're loaded. The basic block ID is
547 /// its index into the vector.
548 DenseMap<Function *, std::vector<BasicBlock *>> BasicBlockFwdRefs;
549 std::deque<Function *> BasicBlockFwdRefQueue;
550
551 /// Indicates that we are using a new encoding for instruction operands where
552 /// most operands in the current FUNCTION_BLOCK are encoded relative to the
553 /// instruction number, for a more compact encoding. Some instruction
554 /// operands are not relative to the instruction ID: basic block numbers, and
555 /// types. Once the old style function blocks have been phased out, we would
556 /// not need this flag.
557 bool UseRelativeIDs = false;
558
559 /// True if all functions will be materialized, negating the need to process
560 /// (e.g.) blockaddress forward references.
561 bool WillMaterializeAllForwardRefs = false;
562
563 bool StripDebugInfo = false;
564 TBAAVerifier TBAAVerifyHelper;
565
566 std::vector<std::string> BundleTags;
567 SmallVector<SyncScope::ID, 8> SSIDs;
568
569public:
570 BitcodeReader(BitstreamCursor Stream, StringRef Strtab,
571 StringRef ProducerIdentification, LLVMContext &Context);
572
573 Error materializeForwardReferencedFunctions();
574
575 Error materialize(GlobalValue *GV) override;
576 Error materializeModule() override;
577 std::vector<StructType *> getIdentifiedStructTypes() const override;
578
579 /// Main interface to parsing a bitcode buffer.
580 /// \returns true if an error occurred.
581 Error parseBitcodeInto(Module *M, bool ShouldLazyLoadMetadata = false,
582 bool IsImporting = false);
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(SmallVectorImpl<uint64_t> &Record, unsigned &Slot,
653 unsigned InstNum, Value *&ResVal,
654 Type **FullTy = nullptr) {
655 if (Slot == Record.size()) return true;
22
Assuming the condition is false
23
Taking false branch
656 unsigned ValNo = (unsigned)Record[Slot++];
657 // Adjust the ValNo, if it was encoded relative to the InstNum.
658 if (UseRelativeIDs)
24
Assuming field 'UseRelativeIDs' is false
25
Taking false branch
659 ValNo = InstNum - ValNo;
660 if (ValNo < InstNum) {
26
Assuming 'ValNo' is >= 'InstNum'
27
Taking false branch
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())
28
Assuming the condition is false
29
Taking false branch
667 return true;
668
669 unsigned TypeNo = (unsigned)Record[Slot++];
670 ResVal = getFnValueByID(ValNo, getTypeByID(TypeNo));
671 if (FullTy
29.1
'FullTy' is non-null
29.1
'FullTy' is non-null
)
30
Taking true branch
672 *FullTy = getFullyStructuredTypeByID(TypeNo);
673 return ResVal == nullptr;
31
Assuming the condition is false
32
Returning zero, which participates in a condition later
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(SmallVectorImpl<uint64_t> &Record, unsigned &Slot,
680 unsigned InstNum, Type *Ty, Value *&ResVal) {
681 if (getValue(Record, Slot, InstNum, Ty, ResVal))
39
Taking false branch
45
Taking false branch
682 return true;
683 // All values currently take a single record slot.
684 ++Slot;
685 return false;
40
Returning zero, which participates in a condition later
46
Returning zero, which participates in a condition later
686 }
687
688 /// Like popValue, but does not increment the Slot number.
689 bool getValue(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(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(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 attributes by adding the corresponding
719 /// argument's pointee type.
720 void propagateByValTypes(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(uint64_t ResumeBit, bool ShouldLazyLoadMetadata = false);
728
729 Error parseComdatRecord(ArrayRef<uint64_t> Record);
730 Error parseGlobalVarRecord(ArrayRef<uint64_t> Record);
731 Error parseFunctionRecord(ArrayRef<uint64_t> Record);
732 Error parseGlobalIndirectSymbolRecord(unsigned BitCode,
733 ArrayRef<uint64_t> Record);
734
735 Error parseAttributeBlock();
736 Error parseAttributeGroupBlock();
737 Error parseTypeTable();
738 Error parseTypeTableBody();
739 Error parseOperandBundleTags();
740 Error parseSyncScopeNames();
741
742 Expected<Value *> recordValue(SmallVectorImpl<uint64_t> &Record,
743 unsigned NameIndex, Triple &TT);
744 void setDeferredFunctionInfo(unsigned FuncBitcodeOffsetDelta, Function *F,
745 ArrayRef<uint64_t> Record);
746 Error parseValueSymbolTable(uint64_t Offset = 0);
747 Error parseGlobalValueSymbolTable();
748 Error parseConstants();
749 Error rememberAndSkipFunctionBodies();
750 Error rememberAndSkipFunctionBody();
751 /// Save the positions of the Metadata blocks and skip parsing the blocks.
752 Error rememberAndSkipMetadata();
753 Error typeCheckLoadStoreInst(Type *ValType, Type *PtrType);
754 Error parseFunctionBody(Function *F);
755 Error globalCleanup();
756 Error resolveGlobalAndIndirectSymbolInits();
757 Error parseUseLists();
758 Error findFunctionInStream(
759 Function *F,
760 DenseMap<Function *, uint64_t>::iterator DeferredFunctionInfoIterator);
761
762 SyncScope::ID getDecodedSyncScopeID(unsigned Val);
763};
764
765/// Class to manage reading and parsing function summary index bitcode
766/// files/sections.
767class ModuleSummaryIndexBitcodeReader : public BitcodeReaderBase {
768 /// The module index built during parsing.
769 ModuleSummaryIndex &TheIndex;
770
771 /// Indicates whether we have encountered a global value summary section
772 /// yet during parsing.
773 bool SeenGlobalValSummary = false;
774
775 /// Indicates whether we have already parsed the VST, used for error checking.
776 bool SeenValueSymbolTable = false;
777
778 /// Set to the offset of the VST recorded in the MODULE_CODE_VSTOFFSET record.
779 /// Used to enable on-demand parsing of the VST.
780 uint64_t VSTOffset = 0;
781
782 // Map to save ValueId to ValueInfo association that was recorded in the
783 // ValueSymbolTable. It is used after the VST is parsed to convert
784 // call graph edges read from the function summary from referencing
785 // callees by their ValueId to using the ValueInfo instead, which is how
786 // they are recorded in the summary index being built.
787 // We save a GUID which refers to the same global as the ValueInfo, but
788 // ignoring the linkage, i.e. for values other than local linkage they are
789 // identical.
790 DenseMap<unsigned, std::pair<ValueInfo, GlobalValue::GUID>>
791 ValueIdToValueInfoMap;
792
793 /// Map populated during module path string table parsing, from the
794 /// module ID to a string reference owned by the index's module
795 /// path string table, used to correlate with combined index
796 /// summary records.
797 DenseMap<uint64_t, StringRef> ModuleIdMap;
798
799 /// Original source file name recorded in a bitcode record.
800 std::string SourceFileName;
801
802 /// The string identifier given to this module by the client, normally the
803 /// path to the bitcode file.
804 StringRef ModulePath;
805
806 /// For per-module summary indexes, the unique numerical identifier given to
807 /// this module by the client.
808 unsigned ModuleId;
809
810public:
811 ModuleSummaryIndexBitcodeReader(BitstreamCursor Stream, StringRef Strtab,
812 ModuleSummaryIndex &TheIndex,
813 StringRef ModulePath, unsigned ModuleId);
814
815 Error parseModule();
816
817private:
818 void setValueGUID(uint64_t ValueID, StringRef ValueName,
819 GlobalValue::LinkageTypes Linkage,
820 StringRef SourceFileName);
821 Error parseValueSymbolTable(
822 uint64_t Offset,
823 DenseMap<unsigned, GlobalValue::LinkageTypes> &ValueIdToLinkageMap);
824 std::vector<ValueInfo> makeRefList(ArrayRef<uint64_t> Record);
825 std::vector<FunctionSummary::EdgeTy> makeCallList(ArrayRef<uint64_t> Record,
826 bool IsOldProfileFormat,
827 bool HasProfile,
828 bool HasRelBF);
829 Error parseEntireSummary(unsigned ID);
830 Error parseModuleStringTable();
831 void parseTypeIdCompatibleVtableSummaryRecord(ArrayRef<uint64_t> Record);
832 void parseTypeIdCompatibleVtableInfo(ArrayRef<uint64_t> Record, size_t &Slot,
833 TypeIdCompatibleVtableInfo &TypeId);
834
835 std::pair<ValueInfo, GlobalValue::GUID>
836 getValueInfoFromValueId(unsigned ValueId);
837
838 void addThisModule();
839 ModuleSummaryIndex::ModuleInfo *getThisModule();
840};
841
842} // end anonymous namespace
843
844std::error_code llvm::errorToErrorCodeAndEmitErrors(LLVMContext &Ctx,
845 Error Err) {
846 if (Err) {
847 std::error_code EC;
848 handleAllErrors(std::move(Err), [&](ErrorInfoBase &EIB) {
849 EC = EIB.convertToErrorCode();
850 Ctx.emitError(EIB.message());
851 });
852 return EC;
853 }
854 return std::error_code();
855}
856
857BitcodeReader::BitcodeReader(BitstreamCursor Stream, StringRef Strtab,
858 StringRef ProducerIdentification,
859 LLVMContext &Context)
860 : BitcodeReaderBase(std::move(Stream), Strtab), Context(Context),
861 ValueList(Context, Stream.SizeInBytes()) {
862 this->ProducerIdentification = ProducerIdentification;
863}
864
865Error BitcodeReader::materializeForwardReferencedFunctions() {
866 if (WillMaterializeAllForwardRefs)
867 return Error::success();
868
869 // Prevent recursion.
870 WillMaterializeAllForwardRefs = true;
871
872 while (!BasicBlockFwdRefQueue.empty()) {
873 Function *F = BasicBlockFwdRefQueue.front();
874 BasicBlockFwdRefQueue.pop_front();
875 assert(F && "Expected valid function")((F && "Expected valid function") ? static_cast<void
> (0) : __assert_fail ("F && \"Expected valid function\""
, "/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 875, __PRETTY_FUNCTION__))
;
876 if (!BasicBlockFwdRefs.count(F))
877 // Already materialized.
878 continue;
879
880 // Check for a function that isn't materializable to prevent an infinite
881 // loop. When parsing a blockaddress stored in a global variable, there
882 // isn't a trivial way to check if a function will have a body without a
883 // linear search through FunctionsWithBodies, so just check it here.
884 if (!F->isMaterializable())
885 return error("Never resolved function from blockaddress");
886
887 // Try to materialize F.
888 if (Error Err = materialize(F))
889 return Err;
890 }
891 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-10~++20200112100611+7fa5290d5bd/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 891, __PRETTY_FUNCTION__))
;
892
893 // Reset state.
894 WillMaterializeAllForwardRefs = false;
895 return Error::success();
896}
897
898//===----------------------------------------------------------------------===//
899// Helper functions to implement forward reference resolution, etc.
900//===----------------------------------------------------------------------===//
901
902static bool hasImplicitComdat(size_t Val) {
903 switch (Val) {
904 default:
905 return false;
906 case 1: // Old WeakAnyLinkage
907 case 4: // Old LinkOnceAnyLinkage
908 case 10: // Old WeakODRLinkage
909 case 11: // Old LinkOnceODRLinkage
910 return true;
911 }
912}
913
914static GlobalValue::LinkageTypes getDecodedLinkage(unsigned Val) {
915 switch (Val) {
916 default: // Map unknown/new linkages to external
917 case 0:
918 return GlobalValue::ExternalLinkage;
919 case 2:
920 return GlobalValue::AppendingLinkage;
921 case 3:
922 return GlobalValue::InternalLinkage;
923 case 5:
924 return GlobalValue::ExternalLinkage; // Obsolete DLLImportLinkage
925 case 6:
926 return GlobalValue::ExternalLinkage; // Obsolete DLLExportLinkage
927 case 7:
928 return GlobalValue::ExternalWeakLinkage;
929 case 8:
930 return GlobalValue::CommonLinkage;
931 case 9:
932 return GlobalValue::PrivateLinkage;
933 case 12:
934 return GlobalValue::AvailableExternallyLinkage;
935 case 13:
936 return GlobalValue::PrivateLinkage; // Obsolete LinkerPrivateLinkage
937 case 14:
938 return GlobalValue::PrivateLinkage; // Obsolete LinkerPrivateWeakLinkage
939 case 15:
940 return GlobalValue::ExternalLinkage; // Obsolete LinkOnceODRAutoHideLinkage
941 case 1: // Old value with implicit comdat.
942 case 16:
943 return GlobalValue::WeakAnyLinkage;
944 case 10: // Old value with implicit comdat.
945 case 17:
946 return GlobalValue::WeakODRLinkage;
947 case 4: // Old value with implicit comdat.
948 case 18:
949 return GlobalValue::LinkOnceAnyLinkage;
950 case 11: // Old value with implicit comdat.
951 case 19:
952 return GlobalValue::LinkOnceODRLinkage;
953 }
954}
955
956static FunctionSummary::FFlags getDecodedFFlags(uint64_t RawFlags) {
957 FunctionSummary::FFlags Flags;
958 Flags.ReadNone = RawFlags & 0x1;
959 Flags.ReadOnly = (RawFlags >> 1) & 0x1;
960 Flags.NoRecurse = (RawFlags >> 2) & 0x1;
961 Flags.ReturnDoesNotAlias = (RawFlags >> 3) & 0x1;
962 Flags.NoInline = (RawFlags >> 4) & 0x1;
963 Flags.AlwaysInline = (RawFlags >> 5) & 0x1;
964 return Flags;
965}
966
967/// Decode the flags for GlobalValue in the summary.
968static GlobalValueSummary::GVFlags getDecodedGVSummaryFlags(uint64_t RawFlags,
969 uint64_t Version) {
970 // Summary were not emitted before LLVM 3.9, we don't need to upgrade Linkage
971 // like getDecodedLinkage() above. Any future change to the linkage enum and
972 // to getDecodedLinkage() will need to be taken into account here as above.
973 auto Linkage = GlobalValue::LinkageTypes(RawFlags & 0xF); // 4 bits
974 RawFlags = RawFlags >> 4;
975 bool NotEligibleToImport = (RawFlags & 0x1) || Version < 3;
976 // The Live flag wasn't introduced until version 3. For dead stripping
977 // to work correctly on earlier versions, we must conservatively treat all
978 // values as live.
979 bool Live = (RawFlags & 0x2) || Version < 3;
980 bool Local = (RawFlags & 0x4);
981 bool AutoHide = (RawFlags & 0x8);
982
983 return GlobalValueSummary::GVFlags(Linkage, NotEligibleToImport, Live, Local, AutoHide);
984}
985
986// Decode the flags for GlobalVariable in the summary
987static GlobalVarSummary::GVarFlags getDecodedGVarFlags(uint64_t RawFlags) {
988 return GlobalVarSummary::GVarFlags((RawFlags & 0x1) ? true : false,
989 (RawFlags & 0x2) ? true : false);
990}
991
992static GlobalValue::VisibilityTypes getDecodedVisibility(unsigned Val) {
993 switch (Val) {
994 default: // Map unknown visibilities to default.
995 case 0: return GlobalValue::DefaultVisibility;
996 case 1: return GlobalValue::HiddenVisibility;
997 case 2: return GlobalValue::ProtectedVisibility;
998 }
999}
1000
1001static GlobalValue::DLLStorageClassTypes
1002getDecodedDLLStorageClass(unsigned Val) {
1003 switch (Val) {
1004 default: // Map unknown values to default.
1005 case 0: return GlobalValue::DefaultStorageClass;
1006 case 1: return GlobalValue::DLLImportStorageClass;
1007 case 2: return GlobalValue::DLLExportStorageClass;
1008 }
1009}
1010
1011static bool getDecodedDSOLocal(unsigned Val) {
1012 switch(Val) {
1013 default: // Map unknown values to preemptable.
1014 case 0: return false;
1015 case 1: return true;
1016 }
1017}
1018
1019static GlobalVariable::ThreadLocalMode getDecodedThreadLocalMode(unsigned Val) {
1020 switch (Val) {
1021 case 0: return GlobalVariable::NotThreadLocal;
1022 default: // Map unknown non-zero value to general dynamic.
1023 case 1: return GlobalVariable::GeneralDynamicTLSModel;
1024 case 2: return GlobalVariable::LocalDynamicTLSModel;
1025 case 3: return GlobalVariable::InitialExecTLSModel;
1026 case 4: return GlobalVariable::LocalExecTLSModel;
1027 }
1028}
1029
1030static GlobalVariable::UnnamedAddr getDecodedUnnamedAddrType(unsigned Val) {
1031 switch (Val) {
1032 default: // Map unknown to UnnamedAddr::None.
1033 case 0: return GlobalVariable::UnnamedAddr::None;
1034 case 1: return GlobalVariable::UnnamedAddr::Global;
1035 case 2: return GlobalVariable::UnnamedAddr::Local;
1036 }
1037}
1038
1039static int getDecodedCastOpcode(unsigned Val) {
1040 switch (Val) {
1041 default: return -1;
1042 case bitc::CAST_TRUNC : return Instruction::Trunc;
1043 case bitc::CAST_ZEXT : return Instruction::ZExt;
1044 case bitc::CAST_SEXT : return Instruction::SExt;
1045 case bitc::CAST_FPTOUI : return Instruction::FPToUI;
1046 case bitc::CAST_FPTOSI : return Instruction::FPToSI;
1047 case bitc::CAST_UITOFP : return Instruction::UIToFP;
1048 case bitc::CAST_SITOFP : return Instruction::SIToFP;
1049 case bitc::CAST_FPTRUNC : return Instruction::FPTrunc;
1050 case bitc::CAST_FPEXT : return Instruction::FPExt;
1051 case bitc::CAST_PTRTOINT: return Instruction::PtrToInt;
1052 case bitc::CAST_INTTOPTR: return Instruction::IntToPtr;
1053 case bitc::CAST_BITCAST : return Instruction::BitCast;
1054 case bitc::CAST_ADDRSPACECAST: return Instruction::AddrSpaceCast;
1055 }
1056}
1057
1058static int getDecodedUnaryOpcode(unsigned Val, Type *Ty) {
1059 bool IsFP = Ty->isFPOrFPVectorTy();
1060 // UnOps are only valid for int/fp or vector of int/fp types
1061 if (!IsFP && !Ty->isIntOrIntVectorTy())
1062 return -1;
1063
1064 switch (Val) {
1065 default:
1066 return -1;
1067 case bitc::UNOP_FNEG:
1068 return IsFP ? Instruction::FNeg : -1;
1069 }
1070}
1071
1072static int getDecodedBinaryOpcode(unsigned Val, Type *Ty) {
1073 bool IsFP = Ty->isFPOrFPVectorTy();
1074 // BinOps are only valid for int/fp or vector of int/fp types
1075 if (!IsFP && !Ty->isIntOrIntVectorTy())
1076 return -1;
1077
1078 switch (Val) {
1079 default:
1080 return -1;
1081 case bitc::BINOP_ADD:
1082 return IsFP ? Instruction::FAdd : Instruction::Add;
1083 case bitc::BINOP_SUB:
1084 return IsFP ? Instruction::FSub : Instruction::Sub;
1085 case bitc::BINOP_MUL:
1086 return IsFP ? Instruction::FMul : Instruction::Mul;
1087 case bitc::BINOP_UDIV:
1088 return IsFP ? -1 : Instruction::UDiv;
1089 case bitc::BINOP_SDIV:
1090 return IsFP ? Instruction::FDiv : Instruction::SDiv;
1091 case bitc::BINOP_UREM:
1092 return IsFP ? -1 : Instruction::URem;
1093 case bitc::BINOP_SREM:
1094 return IsFP ? Instruction::FRem : Instruction::SRem;
1095 case bitc::BINOP_SHL:
1096 return IsFP ? -1 : Instruction::Shl;
1097 case bitc::BINOP_LSHR:
1098 return IsFP ? -1 : Instruction::LShr;
1099 case bitc::BINOP_ASHR:
1100 return IsFP ? -1 : Instruction::AShr;
1101 case bitc::BINOP_AND:
1102 return IsFP ? -1 : Instruction::And;
1103 case bitc::BINOP_OR:
1104 return IsFP ? -1 : Instruction::Or;
1105 case bitc::BINOP_XOR:
1106 return IsFP ? -1 : Instruction::Xor;
1107 }
1108}
1109
1110static AtomicRMWInst::BinOp getDecodedRMWOperation(unsigned Val) {
1111 switch (Val) {
1112 default: return AtomicRMWInst::BAD_BINOP;
1113 case bitc::RMW_XCHG: return AtomicRMWInst::Xchg;
1114 case bitc::RMW_ADD: return AtomicRMWInst::Add;
1115 case bitc::RMW_SUB: return AtomicRMWInst::Sub;
1116 case bitc::RMW_AND: return AtomicRMWInst::And;
1117 case bitc::RMW_NAND: return AtomicRMWInst::Nand;
1118 case bitc::RMW_OR: return AtomicRMWInst::Or;
1119 case bitc::RMW_XOR: return AtomicRMWInst::Xor;
1120 case bitc::RMW_MAX: return AtomicRMWInst::Max;
1121 case bitc::RMW_MIN: return AtomicRMWInst::Min;
1122 case bitc::RMW_UMAX: return AtomicRMWInst::UMax;
1123 case bitc::RMW_UMIN: return AtomicRMWInst::UMin;
1124 case bitc::RMW_FADD: return AtomicRMWInst::FAdd;
1125 case bitc::RMW_FSUB: return AtomicRMWInst::FSub;
1126 }
1127}
1128
1129static AtomicOrdering getDecodedOrdering(unsigned Val) {
1130 switch (Val) {
1131 case bitc::ORDERING_NOTATOMIC: return AtomicOrdering::NotAtomic;
1132 case bitc::ORDERING_UNORDERED: return AtomicOrdering::Unordered;
1133 case bitc::ORDERING_MONOTONIC: return AtomicOrdering::Monotonic;
1134 case bitc::ORDERING_ACQUIRE: return AtomicOrdering::Acquire;
1135 case bitc::ORDERING_RELEASE: return AtomicOrdering::Release;
1136 case bitc::ORDERING_ACQREL: return AtomicOrdering::AcquireRelease;
1137 default: // Map unknown orderings to sequentially-consistent.
1138 case bitc::ORDERING_SEQCST: return AtomicOrdering::SequentiallyConsistent;
1139 }
1140}
1141
1142static Comdat::SelectionKind getDecodedComdatSelectionKind(unsigned Val) {
1143 switch (Val) {
1144 default: // Map unknown selection kinds to any.
1145 case bitc::COMDAT_SELECTION_KIND_ANY:
1146 return Comdat::Any;
1147 case bitc::COMDAT_SELECTION_KIND_EXACT_MATCH:
1148 return Comdat::ExactMatch;
1149 case bitc::COMDAT_SELECTION_KIND_LARGEST:
1150 return Comdat::Largest;
1151 case bitc::COMDAT_SELECTION_KIND_NO_DUPLICATES:
1152 return Comdat::NoDuplicates;
1153 case bitc::COMDAT_SELECTION_KIND_SAME_SIZE:
1154 return Comdat::SameSize;
1155 }
1156}
1157
1158static FastMathFlags getDecodedFastMathFlags(unsigned Val) {
1159 FastMathFlags FMF;
1160 if (0 != (Val & bitc::UnsafeAlgebra))
1161 FMF.setFast();
1162 if (0 != (Val & bitc::AllowReassoc))
1163 FMF.setAllowReassoc();
1164 if (0 != (Val & bitc::NoNaNs))
1165 FMF.setNoNaNs();
1166 if (0 != (Val & bitc::NoInfs))
1167 FMF.setNoInfs();
1168 if (0 != (Val & bitc::NoSignedZeros))
1169 FMF.setNoSignedZeros();
1170 if (0 != (Val & bitc::AllowReciprocal))
1171 FMF.setAllowReciprocal();
1172 if (0 != (Val & bitc::AllowContract))
1173 FMF.setAllowContract(true);
1174 if (0 != (Val & bitc::ApproxFunc))
1175 FMF.setApproxFunc();
1176 return FMF;
1177}
1178
1179static void upgradeDLLImportExportLinkage(GlobalValue *GV, unsigned Val) {
1180 switch (Val) {
1181 case 5: GV->setDLLStorageClass(GlobalValue::DLLImportStorageClass); break;
1182 case 6: GV->setDLLStorageClass(GlobalValue::DLLExportStorageClass); break;
1183 }
1184}
1185
1186Type *BitcodeReader::getFullyStructuredTypeByID(unsigned ID) {
1187 // The type table size is always specified correctly.
1188 if (ID >= TypeList.size())
1189 return nullptr;
1190
1191 if (Type *Ty = TypeList[ID])
1192 return Ty;
1193
1194 // If we have a forward reference, the only possible case is when it is to a
1195 // named struct. Just create a placeholder for now.
1196 return TypeList[ID] = createIdentifiedStructType(Context);
1197}
1198
1199StructType *BitcodeReader::createIdentifiedStructType(LLVMContext &Context,
1200 StringRef Name) {
1201 auto *Ret = StructType::create(Context, Name);
1202 IdentifiedStructTypes.push_back(Ret);
1203 return Ret;
1204}
1205
1206StructType *BitcodeReader::createIdentifiedStructType(LLVMContext &Context) {
1207 auto *Ret = StructType::create(Context);
1208 IdentifiedStructTypes.push_back(Ret);
1209 return Ret;
1210}
1211
1212//===----------------------------------------------------------------------===//
1213// Functions for parsing blocks from the bitcode file
1214//===----------------------------------------------------------------------===//
1215
1216static uint64_t getRawAttributeMask(Attribute::AttrKind Val) {
1217 switch (Val) {
1218 case Attribute::EndAttrKinds:
1219 llvm_unreachable("Synthetic enumerators which should never get here")::llvm::llvm_unreachable_internal("Synthetic enumerators which should never get here"
, "/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 1219)
;
1220
1221 case Attribute::None: return 0;
1222 case Attribute::ZExt: return 1 << 0;
1223 case Attribute::SExt: return 1 << 1;
1224 case Attribute::NoReturn: return 1 << 2;
1225 case Attribute::InReg: return 1 << 3;
1226 case Attribute::StructRet: return 1 << 4;
1227 case Attribute::NoUnwind: return 1 << 5;
1228 case Attribute::NoAlias: return 1 << 6;
1229 case Attribute::ByVal: return 1 << 7;
1230 case Attribute::Nest: return 1 << 8;
1231 case Attribute::ReadNone: return 1 << 9;
1232 case Attribute::ReadOnly: return 1 << 10;
1233 case Attribute::NoInline: return 1 << 11;
1234 case Attribute::AlwaysInline: return 1 << 12;
1235 case Attribute::OptimizeForSize: return 1 << 13;
1236 case Attribute::StackProtect: return 1 << 14;
1237 case Attribute::StackProtectReq: return 1 << 15;
1238 case Attribute::Alignment: return 31 << 16;
1239 case Attribute::NoCapture: return 1 << 21;
1240 case Attribute::NoRedZone: return 1 << 22;
1241 case Attribute::NoImplicitFloat: return 1 << 23;
1242 case Attribute::Naked: return 1 << 24;
1243 case Attribute::InlineHint: return 1 << 25;
1244 case Attribute::StackAlignment: return 7 << 26;
1245 case Attribute::ReturnsTwice: return 1 << 29;
1246 case Attribute::UWTable: return 1 << 30;
1247 case Attribute::NonLazyBind: return 1U << 31;
1248 case Attribute::SanitizeAddress: return 1ULL << 32;
1249 case Attribute::MinSize: return 1ULL << 33;
1250 case Attribute::NoDuplicate: return 1ULL << 34;
1251 case Attribute::StackProtectStrong: return 1ULL << 35;
1252 case Attribute::SanitizeThread: return 1ULL << 36;
1253 case Attribute::SanitizeMemory: return 1ULL << 37;
1254 case Attribute::NoBuiltin: return 1ULL << 38;
1255 case Attribute::Returned: return 1ULL << 39;
1256 case Attribute::Cold: return 1ULL << 40;
1257 case Attribute::Builtin: return 1ULL << 41;
1258 case Attribute::OptimizeNone: return 1ULL << 42;
1259 case Attribute::InAlloca: return 1ULL << 43;
1260 case Attribute::NonNull: return 1ULL << 44;
1261 case Attribute::JumpTable: return 1ULL << 45;
1262 case Attribute::Convergent: return 1ULL << 46;
1263 case Attribute::SafeStack: return 1ULL << 47;
1264 case Attribute::NoRecurse: return 1ULL << 48;
1265 case Attribute::InaccessibleMemOnly: return 1ULL << 49;
1266 case Attribute::InaccessibleMemOrArgMemOnly: return 1ULL << 50;
1267 case Attribute::SwiftSelf: return 1ULL << 51;
1268 case Attribute::SwiftError: return 1ULL << 52;
1269 case Attribute::WriteOnly: return 1ULL << 53;
1270 case Attribute::Speculatable: return 1ULL << 54;
1271 case Attribute::StrictFP: return 1ULL << 55;
1272 case Attribute::SanitizeHWAddress: return 1ULL << 56;
1273 case Attribute::NoCfCheck: return 1ULL << 57;
1274 case Attribute::OptForFuzzing: return 1ULL << 58;
1275 case Attribute::ShadowCallStack: return 1ULL << 59;
1276 case Attribute::SpeculativeLoadHardening:
1277 return 1ULL << 60;
1278 case Attribute::ImmArg:
1279 return 1ULL << 61;
1280 case Attribute::WillReturn:
1281 return 1ULL << 62;
1282 case Attribute::NoFree:
1283 return 1ULL << 63;
1284 case Attribute::NoSync:
1285 llvm_unreachable("nosync attribute not supported in raw format")::llvm::llvm_unreachable_internal("nosync attribute not supported in raw format"
, "/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 1285)
;
1286 break;
1287 case Attribute::Dereferenceable:
1288 llvm_unreachable("dereferenceable attribute not supported in raw format")::llvm::llvm_unreachable_internal("dereferenceable attribute not supported in raw format"
, "/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 1288)
;
1289 break;
1290 case Attribute::DereferenceableOrNull:
1291 llvm_unreachable("dereferenceable_or_null attribute not supported in raw "::llvm::llvm_unreachable_internal("dereferenceable_or_null attribute not supported in raw "
"format", "/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 1292)
1292 "format")::llvm::llvm_unreachable_internal("dereferenceable_or_null attribute not supported in raw "
"format", "/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 1292)
;
1293 break;
1294 case Attribute::ArgMemOnly:
1295 llvm_unreachable("argmemonly attribute not supported in raw format")::llvm::llvm_unreachable_internal("argmemonly attribute not supported in raw format"
, "/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 1295)
;
1296 break;
1297 case Attribute::AllocSize:
1298 llvm_unreachable("allocsize not supported in raw format")::llvm::llvm_unreachable_internal("allocsize not supported in raw format"
, "/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 1298)
;
1299 break;
1300 case Attribute::SanitizeMemTag:
1301 llvm_unreachable("sanitize_memtag attribute not supported in raw format")::llvm::llvm_unreachable_internal("sanitize_memtag attribute not supported in raw format"
, "/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 1301)
;
1302 break;
1303 }
1304 llvm_unreachable("Unsupported attribute type")::llvm::llvm_unreachable_internal("Unsupported attribute type"
, "/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 1304)
;
1305}
1306
1307static void addRawAttributeValue(AttrBuilder &B, uint64_t Val) {
1308 if (!Val) return;
1309
1310 for (Attribute::AttrKind I = Attribute::None; I != Attribute::EndAttrKinds;
1311 I = Attribute::AttrKind(I + 1)) {
1312 if (I == Attribute::SanitizeMemTag ||
1313 I == Attribute::Dereferenceable ||
1314 I == Attribute::DereferenceableOrNull ||
1315 I == Attribute::ArgMemOnly ||
1316 I == Attribute::AllocSize ||
1317 I == Attribute::NoSync)
1318 continue;
1319 if (uint64_t A = (Val & getRawAttributeMask(I))) {
1320 if (I == Attribute::Alignment)
1321 B.addAlignmentAttr(1ULL << ((A >> 16) - 1));
1322 else if (I == Attribute::StackAlignment)
1323 B.addStackAlignmentAttr(1ULL << ((A >> 26)-1));
1324 else
1325 B.addAttribute(I);
1326 }
1327 }
1328}
1329
1330/// This fills an AttrBuilder object with the LLVM attributes that have
1331/// been decoded from the given integer. This function must stay in sync with
1332/// 'encodeLLVMAttributesForBitcode'.
1333static void decodeLLVMAttributesForBitcode(AttrBuilder &B,
1334 uint64_t EncodedAttrs) {
1335 // FIXME: Remove in 4.0.
1336
1337 // The alignment is stored as a 16-bit raw value from bits 31--16. We shift
1338 // the bits above 31 down by 11 bits.
1339 unsigned Alignment = (EncodedAttrs & (0xffffULL << 16)) >> 16;
1340 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-10~++20200112100611+7fa5290d5bd/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 1341, __PRETTY_FUNCTION__))
1341 "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-10~++20200112100611+7fa5290d5bd/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 1341, __PRETTY_FUNCTION__))
;
1342
1343 if (Alignment)
1344 B.addAlignmentAttr(Alignment);
1345 addRawAttributeValue(B, ((EncodedAttrs & (0xfffffULL << 32)) >> 11) |
1346 (EncodedAttrs & 0xffff));
1347}
1348
1349Error BitcodeReader::parseAttributeBlock() {
1350 if (Error Err = Stream.EnterSubBlock(bitc::PARAMATTR_BLOCK_ID))
1351 return Err;
1352
1353 if (!MAttributes.empty())
1354 return error("Invalid multiple blocks");
1355
1356 SmallVector<uint64_t, 64> Record;
1357
1358 SmallVector<AttributeList, 8> Attrs;
1359
1360 // Read all the records.
1361 while (true) {
1362 Expected<BitstreamEntry> MaybeEntry = Stream.advanceSkippingSubblocks();
1363 if (!MaybeEntry)
1364 return MaybeEntry.takeError();
1365 BitstreamEntry Entry = MaybeEntry.get();
1366
1367 switch (Entry.Kind) {
1368 case BitstreamEntry::SubBlock: // Handled for us already.
1369 case BitstreamEntry::Error:
1370 return error("Malformed block");
1371 case BitstreamEntry::EndBlock:
1372 return Error::success();
1373 case BitstreamEntry::Record:
1374 // The interesting case.
1375 break;
1376 }
1377
1378 // Read a record.
1379 Record.clear();
1380 Expected<unsigned> MaybeRecord = Stream.readRecord(Entry.ID, Record);
1381 if (!MaybeRecord)
1382 return MaybeRecord.takeError();
1383 switch (MaybeRecord.get()) {
1384 default: // Default behavior: ignore.
1385 break;
1386 case bitc::PARAMATTR_CODE_ENTRY_OLD: // ENTRY: [paramidx0, attr0, ...]
1387 // FIXME: Remove in 4.0.
1388 if (Record.size() & 1)
1389 return error("Invalid record");
1390
1391 for (unsigned i = 0, e = Record.size(); i != e; i += 2) {
1392 AttrBuilder B;
1393 decodeLLVMAttributesForBitcode(B, Record[i+1]);
1394 Attrs.push_back(AttributeList::get(Context, Record[i], B));
1395 }
1396
1397 MAttributes.push_back(AttributeList::get(Context, Attrs));
1398 Attrs.clear();
1399 break;
1400 case bitc::PARAMATTR_CODE_ENTRY: // ENTRY: [attrgrp0, attrgrp1, ...]
1401 for (unsigned i = 0, e = Record.size(); i != e; ++i)
1402 Attrs.push_back(MAttributeGroups[Record[i]]);
1403
1404 MAttributes.push_back(AttributeList::get(Context, Attrs));
1405 Attrs.clear();
1406 break;
1407 }
1408 }
1409}
1410
1411// Returns Attribute::None on unrecognized codes.
1412static Attribute::AttrKind getAttrFromCode(uint64_t Code) {
1413 switch (Code) {
1414 default:
1415 return Attribute::None;
1416 case bitc::ATTR_KIND_ALIGNMENT:
1417 return Attribute::Alignment;
1418 case bitc::ATTR_KIND_ALWAYS_INLINE:
1419 return Attribute::AlwaysInline;
1420 case bitc::ATTR_KIND_ARGMEMONLY:
1421 return Attribute::ArgMemOnly;
1422 case bitc::ATTR_KIND_BUILTIN:
1423 return Attribute::Builtin;
1424 case bitc::ATTR_KIND_BY_VAL:
1425 return Attribute::ByVal;
1426 case bitc::ATTR_KIND_IN_ALLOCA:
1427 return Attribute::InAlloca;
1428 case bitc::ATTR_KIND_COLD:
1429 return Attribute::Cold;
1430 case bitc::ATTR_KIND_CONVERGENT:
1431 return Attribute::Convergent;
1432 case bitc::ATTR_KIND_INACCESSIBLEMEM_ONLY:
1433 return Attribute::InaccessibleMemOnly;
1434 case bitc::ATTR_KIND_INACCESSIBLEMEM_OR_ARGMEMONLY:
1435 return Attribute::InaccessibleMemOrArgMemOnly;
1436 case bitc::ATTR_KIND_INLINE_HINT:
1437 return Attribute::InlineHint;
1438 case bitc::ATTR_KIND_IN_REG:
1439 return Attribute::InReg;
1440 case bitc::ATTR_KIND_JUMP_TABLE:
1441 return Attribute::JumpTable;
1442 case bitc::ATTR_KIND_MIN_SIZE:
1443 return Attribute::MinSize;
1444 case bitc::ATTR_KIND_NAKED:
1445 return Attribute::Naked;
1446 case bitc::ATTR_KIND_NEST:
1447 return Attribute::Nest;
1448 case bitc::ATTR_KIND_NO_ALIAS:
1449 return Attribute::NoAlias;
1450 case bitc::ATTR_KIND_NO_BUILTIN:
1451 return Attribute::NoBuiltin;
1452 case bitc::ATTR_KIND_NO_CAPTURE:
1453 return Attribute::NoCapture;
1454 case bitc::ATTR_KIND_NO_DUPLICATE:
1455 return Attribute::NoDuplicate;
1456 case bitc::ATTR_KIND_NOFREE:
1457 return Attribute::NoFree;
1458 case bitc::ATTR_KIND_NO_IMPLICIT_FLOAT:
1459 return Attribute::NoImplicitFloat;
1460 case bitc::ATTR_KIND_NO_INLINE:
1461 return Attribute::NoInline;
1462 case bitc::ATTR_KIND_NO_RECURSE:
1463 return Attribute::NoRecurse;
1464 case bitc::ATTR_KIND_NON_LAZY_BIND:
1465 return Attribute::NonLazyBind;
1466 case bitc::ATTR_KIND_NON_NULL:
1467 return Attribute::NonNull;
1468 case bitc::ATTR_KIND_DEREFERENCEABLE:
1469 return Attribute::Dereferenceable;
1470 case bitc::ATTR_KIND_DEREFERENCEABLE_OR_NULL:
1471 return Attribute::DereferenceableOrNull;
1472 case bitc::ATTR_KIND_ALLOC_SIZE:
1473 return Attribute::AllocSize;
1474 case bitc::ATTR_KIND_NO_RED_ZONE:
1475 return Attribute::NoRedZone;
1476 case bitc::ATTR_KIND_NO_RETURN:
1477 return Attribute::NoReturn;
1478 case bitc::ATTR_KIND_NOSYNC:
1479 return Attribute::NoSync;
1480 case bitc::ATTR_KIND_NOCF_CHECK:
1481 return Attribute::NoCfCheck;
1482 case bitc::ATTR_KIND_NO_UNWIND:
1483 return Attribute::NoUnwind;
1484 case bitc::ATTR_KIND_OPT_FOR_FUZZING:
1485 return Attribute::OptForFuzzing;
1486 case bitc::ATTR_KIND_OPTIMIZE_FOR_SIZE:
1487 return Attribute::OptimizeForSize;
1488 case bitc::ATTR_KIND_OPTIMIZE_NONE:
1489 return Attribute::OptimizeNone;
1490 case bitc::ATTR_KIND_READ_NONE:
1491 return Attribute::ReadNone;
1492 case bitc::ATTR_KIND_READ_ONLY:
1493 return Attribute::ReadOnly;
1494 case bitc::ATTR_KIND_RETURNED:
1495 return Attribute::Returned;
1496 case bitc::ATTR_KIND_RETURNS_TWICE:
1497 return Attribute::ReturnsTwice;
1498 case bitc::ATTR_KIND_S_EXT:
1499 return Attribute::SExt;
1500 case bitc::ATTR_KIND_SPECULATABLE:
1501 return Attribute::Speculatable;
1502 case bitc::ATTR_KIND_STACK_ALIGNMENT:
1503 return Attribute::StackAlignment;
1504 case bitc::ATTR_KIND_STACK_PROTECT:
1505 return Attribute::StackProtect;
1506 case bitc::ATTR_KIND_STACK_PROTECT_REQ:
1507 return Attribute::StackProtectReq;
1508 case bitc::ATTR_KIND_STACK_PROTECT_STRONG:
1509 return Attribute::StackProtectStrong;
1510 case bitc::ATTR_KIND_SAFESTACK:
1511 return Attribute::SafeStack;
1512 case bitc::ATTR_KIND_SHADOWCALLSTACK:
1513 return Attribute::ShadowCallStack;
1514 case bitc::ATTR_KIND_STRICT_FP:
1515 return Attribute::StrictFP;
1516 case bitc::ATTR_KIND_STRUCT_RET:
1517 return Attribute::StructRet;
1518 case bitc::ATTR_KIND_SANITIZE_ADDRESS:
1519 return Attribute::SanitizeAddress;
1520 case bitc::ATTR_KIND_SANITIZE_HWADDRESS:
1521 return Attribute::SanitizeHWAddress;
1522 case bitc::ATTR_KIND_SANITIZE_THREAD:
1523 return Attribute::SanitizeThread;
1524 case bitc::ATTR_KIND_SANITIZE_MEMORY:
1525 return Attribute::SanitizeMemory;
1526 case bitc::ATTR_KIND_SPECULATIVE_LOAD_HARDENING:
1527 return Attribute::SpeculativeLoadHardening;
1528 case bitc::ATTR_KIND_SWIFT_ERROR:
1529 return Attribute::SwiftError;
1530 case bitc::ATTR_KIND_SWIFT_SELF:
1531 return Attribute::SwiftSelf;
1532 case bitc::ATTR_KIND_UW_TABLE:
1533 return Attribute::UWTable;
1534 case bitc::ATTR_KIND_WILLRETURN:
1535 return Attribute::WillReturn;
1536 case bitc::ATTR_KIND_WRITEONLY:
1537 return Attribute::WriteOnly;
1538 case bitc::ATTR_KIND_Z_EXT:
1539 return Attribute::ZExt;
1540 case bitc::ATTR_KIND_IMMARG:
1541 return Attribute::ImmArg;
1542 case bitc::ATTR_KIND_SANITIZE_MEMTAG:
1543 return Attribute::SanitizeMemTag;
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
1619 B.addAttribute(Kind);
1620 } else if (Record[i] == 1) { // Integer attribute
1621 Attribute::AttrKind Kind;
1622 if (Error Err = parseAttrKind(Record[++i], &Kind))
1623 return Err;
1624 if (Kind == Attribute::Alignment)
1625 B.addAlignmentAttr(Record[++i]);
1626 else if (Kind == Attribute::StackAlignment)
1627 B.addStackAlignmentAttr(Record[++i]);
1628 else if (Kind == Attribute::Dereferenceable)
1629 B.addDereferenceableAttr(Record[++i]);
1630 else if (Kind == Attribute::DereferenceableOrNull)
1631 B.addDereferenceableOrNullAttr(Record[++i]);
1632 else if (Kind == Attribute::AllocSize)
1633 B.addAllocSizeAttrFromRawRepr(Record[++i]);
1634 } else if (Record[i] == 3 || Record[i] == 4) { // String attribute
1635 bool HasValue = (Record[i++] == 4);
1636 SmallString<64> KindStr;
1637 SmallString<64> ValStr;
1638
1639 while (Record[i] != 0 && i != e)
1640 KindStr += Record[i++];
1641 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-10~++20200112100611+7fa5290d5bd/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 1641, __PRETTY_FUNCTION__))
;
1642
1643 if (HasValue) {
1644 // Has a value associated with it.
1645 ++i; // Skip the '0' that terminates the "kind" string.
1646 while (Record[i] != 0 && i != e)
1647 ValStr += Record[i++];
1648 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-10~++20200112100611+7fa5290d5bd/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 1648, __PRETTY_FUNCTION__))
;
1649 }
1650
1651 B.addAttribute(KindStr.str(), ValStr.str());
1652 } else {
1653 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-10~++20200112100611+7fa5290d5bd/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 1654, __PRETTY_FUNCTION__))
1654 "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-10~++20200112100611+7fa5290d5bd/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 1654, __PRETTY_FUNCTION__))
;
1655 bool HasType = Record[i] == 6;
1656 Attribute::AttrKind Kind;
1657 if (Error Err = parseAttrKind(Record[++i], &Kind))
1658 return Err;
1659 if (Kind == Attribute::ByVal)
1660 B.addByValAttr(HasType ? getTypeByID(Record[++i]) : nullptr);
1661 }
1662 }
1663
1664 UpgradeFramePointerAttributes(B);
1665 MAttributeGroups[GrpID] = AttributeList::get(Context, Idx, B);
1666 break;
1667 }
1668 }
1669 }
1670}
1671
1672Error BitcodeReader::parseTypeTable() {
1673 if (Error Err = Stream.EnterSubBlock(bitc::TYPE_BLOCK_ID_NEW))
1674 return Err;
1675
1676 return parseTypeTableBody();
1677}
1678
1679Error BitcodeReader::parseTypeTableBody() {
1680 if (!TypeList.empty())
1681 return error("Invalid multiple blocks");
1682
1683 SmallVector<uint64_t, 64> Record;
1684 unsigned NumRecords = 0;
1685
1686 SmallString<64> TypeName;
1687
1688 // Read all the records for this type table.
1689 while (true) {
1690 Expected<BitstreamEntry> MaybeEntry = Stream.advanceSkippingSubblocks();
1691 if (!MaybeEntry)
1692 return MaybeEntry.takeError();
1693 BitstreamEntry Entry = MaybeEntry.get();
1694
1695 switch (Entry.Kind) {
1696 case BitstreamEntry::SubBlock: // Handled for us already.
1697 case BitstreamEntry::Error:
1698 return error("Malformed block");
1699 case BitstreamEntry::EndBlock:
1700 if (NumRecords != TypeList.size())
1701 return error("Malformed block");
1702 return Error::success();
1703 case BitstreamEntry::Record:
1704 // The interesting case.
1705 break;
1706 }
1707
1708 // Read a record.
1709 Record.clear();
1710 Type *ResultTy = nullptr;
1711 Expected<unsigned> MaybeRecord = Stream.readRecord(Entry.ID, Record);
1712 if (!MaybeRecord)
1713 return MaybeRecord.takeError();
1714 switch (MaybeRecord.get()) {
1715 default:
1716 return error("Invalid value");
1717 case bitc::TYPE_CODE_NUMENTRY: // TYPE_CODE_NUMENTRY: [numentries]
1718 // TYPE_CODE_NUMENTRY contains a count of the number of types in the
1719 // type list. This allows us to reserve space.
1720 if (Record.size() < 1)
1721 return error("Invalid record");
1722 TypeList.resize(Record[0]);
1723 continue;
1724 case bitc::TYPE_CODE_VOID: // VOID
1725 ResultTy = Type::getVoidTy(Context);
1726 break;
1727 case bitc::TYPE_CODE_HALF: // HALF
1728 ResultTy = Type::getHalfTy(Context);
1729 break;
1730 case bitc::TYPE_CODE_FLOAT: // FLOAT
1731 ResultTy = Type::getFloatTy(Context);
1732 break;
1733 case bitc::TYPE_CODE_DOUBLE: // DOUBLE
1734 ResultTy = Type::getDoubleTy(Context);
1735 break;
1736 case bitc::TYPE_CODE_X86_FP80: // X86_FP80
1737 ResultTy = Type::getX86_FP80Ty(Context);
1738 break;
1739 case bitc::TYPE_CODE_FP128: // FP128
1740 ResultTy = Type::getFP128Ty(Context);
1741 break;
1742 case bitc::TYPE_CODE_PPC_FP128: // PPC_FP128
1743 ResultTy = Type::getPPC_FP128Ty(Context);
1744 break;
1745 case bitc::TYPE_CODE_LABEL: // LABEL
1746 ResultTy = Type::getLabelTy(Context);
1747 break;
1748 case bitc::TYPE_CODE_METADATA: // METADATA
1749 ResultTy = Type::getMetadataTy(Context);
1750 break;
1751 case bitc::TYPE_CODE_X86_MMX: // X86_MMX
1752 ResultTy = Type::getX86_MMXTy(Context);
1753 break;
1754 case bitc::TYPE_CODE_TOKEN: // TOKEN
1755 ResultTy = Type::getTokenTy(Context);
1756 break;
1757 case bitc::TYPE_CODE_INTEGER: { // INTEGER: [width]
1758 if (Record.size() < 1)
1759 return error("Invalid record");
1760
1761 uint64_t NumBits = Record[0];
1762 if (NumBits < IntegerType::MIN_INT_BITS ||
1763 NumBits > IntegerType::MAX_INT_BITS)
1764 return error("Bitwidth for integer type out of range");
1765 ResultTy = IntegerType::get(Context, NumBits);
1766 break;
1767 }
1768 case bitc::TYPE_CODE_POINTER: { // POINTER: [pointee type] or
1769 // [pointee type, address space]
1770 if (Record.size() < 1)
1771 return error("Invalid record");
1772 unsigned AddressSpace = 0;
1773 if (Record.size() == 2)
1774 AddressSpace = Record[1];
1775 ResultTy = getTypeByID(Record[0]);
1776 if (!ResultTy ||
1777 !PointerType::isValidElementType(ResultTy))
1778 return error("Invalid type");
1779 ResultTy = PointerType::get(ResultTy, AddressSpace);
1780 break;
1781 }
1782 case bitc::TYPE_CODE_FUNCTION_OLD: {
1783 // FIXME: attrid is dead, remove it in LLVM 4.0
1784 // FUNCTION: [vararg, attrid, retty, paramty x N]
1785 if (Record.size() < 3)
1786 return error("Invalid record");
1787 SmallVector<Type*, 8> ArgTys;
1788 for (unsigned i = 3, e = Record.size(); i != e; ++i) {
1789 if (Type *T = getTypeByID(Record[i]))
1790 ArgTys.push_back(T);
1791 else
1792 break;
1793 }
1794
1795 ResultTy = getTypeByID(Record[2]);
1796 if (!ResultTy || ArgTys.size() < Record.size()-3)
1797 return error("Invalid type");
1798
1799 ResultTy = FunctionType::get(ResultTy, ArgTys, Record[0]);
1800 break;
1801 }
1802 case bitc::TYPE_CODE_FUNCTION: {
1803 // FUNCTION: [vararg, retty, paramty x N]
1804 if (Record.size() < 2)
1805 return error("Invalid record");
1806 SmallVector<Type*, 8> ArgTys;
1807 for (unsigned i = 2, e = Record.size(); i != e; ++i) {
1808 if (Type *T = getTypeByID(Record[i])) {
1809 if (!FunctionType::isValidArgumentType(T))
1810 return error("Invalid function argument type");
1811 ArgTys.push_back(T);
1812 }
1813 else
1814 break;
1815 }
1816
1817 ResultTy = getTypeByID(Record[1]);
1818 if (!ResultTy || ArgTys.size() < Record.size()-2)
1819 return error("Invalid type");
1820
1821 ResultTy = FunctionType::get(ResultTy, ArgTys, Record[0]);
1822 break;
1823 }
1824 case bitc::TYPE_CODE_STRUCT_ANON: { // STRUCT: [ispacked, eltty x N]
1825 if (Record.size() < 1)
1826 return error("Invalid record");
1827 SmallVector<Type*, 8> EltTys;
1828 for (unsigned i = 1, e = Record.size(); i != e; ++i) {
1829 if (Type *T = getTypeByID(Record[i]))
1830 EltTys.push_back(T);
1831 else
1832 break;
1833 }
1834 if (EltTys.size() != Record.size()-1)
1835 return error("Invalid type");
1836 ResultTy = StructType::get(Context, EltTys, Record[0]);
1837 break;
1838 }
1839 case bitc::TYPE_CODE_STRUCT_NAME: // STRUCT_NAME: [strchr x N]
1840 if (convertToString(Record, 0, TypeName))
1841 return error("Invalid record");
1842 continue;
1843
1844 case bitc::TYPE_CODE_STRUCT_NAMED: { // STRUCT: [ispacked, eltty x N]
1845 if (Record.size() < 1)
1846 return error("Invalid record");
1847
1848 if (NumRecords >= TypeList.size())
1849 return error("Invalid TYPE table");
1850
1851 // Check to see if this was forward referenced, if so fill in the temp.
1852 StructType *Res = cast_or_null<StructType>(TypeList[NumRecords]);
1853 if (Res) {
1854 Res->setName(TypeName);
1855 TypeList[NumRecords] = nullptr;
1856 } else // Otherwise, create a new struct.
1857 Res = createIdentifiedStructType(Context, TypeName);
1858 TypeName.clear();
1859
1860 SmallVector<Type*, 8> EltTys;
1861 for (unsigned i = 1, e = Record.size(); i != e; ++i) {
1862 if (Type *T = getTypeByID(Record[i]))
1863 EltTys.push_back(T);
1864 else
1865 break;
1866 }
1867 if (EltTys.size() != Record.size()-1)
1868 return error("Invalid record");
1869 Res->setBody(EltTys, Record[0]);
1870 ResultTy = Res;
1871 break;
1872 }
1873 case bitc::TYPE_CODE_OPAQUE: { // OPAQUE: []
1874 if (Record.size() != 1)
1875 return error("Invalid record");
1876
1877 if (NumRecords >= TypeList.size())
1878 return error("Invalid TYPE table");
1879
1880 // Check to see if this was forward referenced, if so fill in the temp.
1881 StructType *Res = cast_or_null<StructType>(TypeList[NumRecords]);
1882 if (Res) {
1883 Res->setName(TypeName);
1884 TypeList[NumRecords] = nullptr;
1885 } else // Otherwise, create a new struct with no body.
1886 Res = createIdentifiedStructType(Context, TypeName);
1887 TypeName.clear();
1888 ResultTy = Res;
1889 break;
1890 }
1891 case bitc::TYPE_CODE_ARRAY: // ARRAY: [numelts, eltty]
1892 if (Record.size() < 2)
1893 return error("Invalid record");
1894 ResultTy = getTypeByID(Record[1]);
1895 if (!ResultTy || !ArrayType::isValidElementType(ResultTy))
1896 return error("Invalid type");
1897 ResultTy = ArrayType::get(ResultTy, Record[0]);
1898 break;
1899 case bitc::TYPE_CODE_VECTOR: // VECTOR: [numelts, eltty] or
1900 // [numelts, eltty, scalable]
1901 if (Record.size() < 2)
1902 return error("Invalid record");
1903 if (Record[0] == 0)
1904 return error("Invalid vector length");
1905 ResultTy = getTypeByID(Record[1]);
1906 if (!ResultTy || !StructType::isValidElementType(ResultTy))
1907 return error("Invalid type");
1908 bool Scalable = Record.size() > 2 ? Record[2] : false;
1909 ResultTy = VectorType::get(ResultTy, Record[0], Scalable);
1910 break;
1911 }
1912
1913 if (NumRecords >= TypeList.size())
1914 return error("Invalid TYPE table");
1915 if (TypeList[NumRecords])
1916 return error(
1917 "Invalid TYPE table: Only named structs can be forward referenced");
1918 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-10~++20200112100611+7fa5290d5bd/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 1918, __PRETTY_FUNCTION__))
;
1919 TypeList[NumRecords++] = ResultTy;
1920 }
1921}
1922
1923Error BitcodeReader::parseOperandBundleTags() {
1924 if (Error Err = Stream.EnterSubBlock(bitc::OPERAND_BUNDLE_TAGS_BLOCK_ID))
1925 return Err;
1926
1927 if (!BundleTags.empty())
1928 return error("Invalid multiple blocks");
1929
1930 SmallVector<uint64_t, 64> Record;
1931
1932 while (true) {
1933 Expected<BitstreamEntry> MaybeEntry = Stream.advanceSkippingSubblocks();
1934 if (!MaybeEntry)
1935 return MaybeEntry.takeError();
1936 BitstreamEntry Entry = MaybeEntry.get();
1937
1938 switch (Entry.Kind) {
1939 case BitstreamEntry::SubBlock: // Handled for us already.
1940 case BitstreamEntry::Error:
1941 return error("Malformed block");
1942 case BitstreamEntry::EndBlock:
1943 return Error::success();
1944 case BitstreamEntry::Record:
1945 // The interesting case.
1946 break;
1947 }
1948
1949 // Tags are implicitly mapped to integers by their order.
1950
1951 Expected<unsigned> MaybeRecord = Stream.readRecord(Entry.ID, Record);
1952 if (!MaybeRecord)
1953 return MaybeRecord.takeError();
1954 if (MaybeRecord.get() != bitc::OPERAND_BUNDLE_TAG)
1955 return error("Invalid record");
1956
1957 // OPERAND_BUNDLE_TAG: [strchr x N]
1958 BundleTags.emplace_back();
1959 if (convertToString(Record, 0, BundleTags.back()))
1960 return error("Invalid record");
1961 Record.clear();
1962 }
1963}
1964
1965Error BitcodeReader::parseSyncScopeNames() {
1966 if (Error Err = Stream.EnterSubBlock(bitc::SYNC_SCOPE_NAMES_BLOCK_ID))
1967 return Err;
1968
1969 if (!SSIDs.empty())
1970 return error("Invalid multiple synchronization scope names blocks");
1971
1972 SmallVector<uint64_t, 64> Record;
1973 while (true) {
1974 Expected<BitstreamEntry> MaybeEntry = Stream.advanceSkippingSubblocks();
1975 if (!MaybeEntry)
1976 return MaybeEntry.takeError();
1977 BitstreamEntry Entry = MaybeEntry.get();
1978
1979 switch (Entry.Kind) {
1980 case BitstreamEntry::SubBlock: // Handled for us already.
1981 case BitstreamEntry::Error:
1982 return error("Malformed block");
1983 case BitstreamEntry::EndBlock:
1984 if (SSIDs.empty())
1985 return error("Invalid empty synchronization scope names block");
1986 return Error::success();
1987 case BitstreamEntry::Record:
1988 // The interesting case.
1989 break;
1990 }
1991
1992 // Synchronization scope names are implicitly mapped to synchronization
1993 // scope IDs by their order.
1994
1995 Expected<unsigned> MaybeRecord = Stream.readRecord(Entry.ID, Record);
1996 if (!MaybeRecord)
1997 return MaybeRecord.takeError();
1998 if (MaybeRecord.get() != bitc::SYNC_SCOPE_NAME)
1999 return error("Invalid record");
2000
2001 SmallString<16> SSN;
2002 if (convertToString(Record, 0, SSN))
2003 return error("Invalid record");
2004
2005 SSIDs.push_back(Context.getOrInsertSyncScopeID(SSN));
2006 Record.clear();
2007 }
2008}
2009
2010/// Associate a value with its name from the given index in the provided record.
2011Expected<Value *> BitcodeReader::recordValue(SmallVectorImpl<uint64_t> &Record,
2012 unsigned NameIndex, Triple &TT) {
2013 SmallString<128> ValueName;
2014 if (convertToString(Record, NameIndex, ValueName))
2015 return error("Invalid record");
2016 unsigned ValueID = Record[0];
2017 if (ValueID >= ValueList.size() || !ValueList[ValueID])
2018 return error("Invalid record");
2019 Value *V = ValueList[ValueID];
2020
2021 StringRef NameStr(ValueName.data(), ValueName.size());
2022 if (NameStr.find_first_of(0) != StringRef::npos)
2023 return error("Invalid value name");
2024 V->setName(NameStr);
2025 auto *GO = dyn_cast<GlobalObject>(V);
2026 if (GO) {
2027 if (GO->getComdat() == reinterpret_cast<Comdat *>(1)) {
2028 if (TT.supportsCOMDAT())
2029 GO->setComdat(TheModule->getOrInsertComdat(V->getName()));
2030 else
2031 GO->setComdat(nullptr);
2032 }
2033 }
2034 return V;
2035}
2036
2037/// Helper to note and return the current location, and jump to the given
2038/// offset.
2039static Expected<uint64_t> jumpToValueSymbolTable(uint64_t Offset,
2040 BitstreamCursor &Stream) {
2041 // Save the current parsing location so we can jump back at the end
2042 // of the VST read.
2043 uint64_t CurrentBit = Stream.GetCurrentBitNo();
2044 if (Error JumpFailed = Stream.JumpToBit(Offset * 32))
2045 return std::move(JumpFailed);
2046 Expected<BitstreamEntry> MaybeEntry = Stream.advance();
2047 if (!MaybeEntry)
2048 return MaybeEntry.takeError();
2049 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-10~++20200112100611+7fa5290d5bd/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 2049, __PRETTY_FUNCTION__))
;
2050 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-10~++20200112100611+7fa5290d5bd/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 2050, __PRETTY_FUNCTION__))
;
2051 return CurrentBit;
2052}
2053
2054void BitcodeReader::setDeferredFunctionInfo(unsigned FuncBitcodeOffsetDelta,
2055 Function *F,
2056 ArrayRef<uint64_t> Record) {
2057 // Note that we subtract 1 here because the offset is relative to one word
2058 // before the start of the identification or module block, which was
2059 // historically always the start of the regular bitcode header.
2060 uint64_t FuncWordOffset = Record[1] - 1;
2061 uint64_t FuncBitOffset = FuncWordOffset * 32;
2062 DeferredFunctionInfo[F] = FuncBitOffset + FuncBitcodeOffsetDelta;
2063 // Set the LastFunctionBlockBit to point to the last function block.
2064 // Later when parsing is resumed after function materialization,
2065 // we can simply skip that last function block.
2066 if (FuncBitOffset > LastFunctionBlockBit)
2067 LastFunctionBlockBit = FuncBitOffset;
2068}
2069
2070/// Read a new-style GlobalValue symbol table.
2071Error BitcodeReader::parseGlobalValueSymbolTable() {
2072 unsigned FuncBitcodeOffsetDelta =
2073 Stream.getAbbrevIDWidth() + bitc::BlockIDWidth;
2074
2075 if (Error Err = Stream.EnterSubBlock(bitc::VALUE_SYMTAB_BLOCK_ID))
2076 return Err;
2077
2078 SmallVector<uint64_t, 64> Record;
2079 while (true) {
2080 Expected<BitstreamEntry> MaybeEntry = Stream.advanceSkippingSubblocks();
2081 if (!MaybeEntry)
2082 return MaybeEntry.takeError();
2083 BitstreamEntry Entry = MaybeEntry.get();
2084
2085 switch (Entry.Kind) {
2086 case BitstreamEntry::SubBlock:
2087 case BitstreamEntry::Error:
2088 return error("Malformed block");
2089 case BitstreamEntry::EndBlock:
2090 return Error::success();
2091 case BitstreamEntry::Record:
2092 break;
2093 }
2094
2095 Record.clear();
2096 Expected<unsigned> MaybeRecord = Stream.readRecord(Entry.ID, Record);
2097 if (!MaybeRecord)
2098 return MaybeRecord.takeError();
2099 switch (MaybeRecord.get()) {
2100 case bitc::VST_CODE_FNENTRY: // [valueid, offset]
2101 setDeferredFunctionInfo(FuncBitcodeOffsetDelta,
2102 cast<Function>(ValueList[Record[0]]), Record);
2103 break;
2104 }
2105 }
2106}
2107
2108/// Parse the value symbol table at either the current parsing location or
2109/// at the given bit offset if provided.
2110Error BitcodeReader::parseValueSymbolTable(uint64_t Offset) {
2111 uint64_t CurrentBit;
2112 // Pass in the Offset to distinguish between calling for the module-level
2113 // VST (where we want to jump to the VST offset) and the function-level
2114 // VST (where we don't).
2115 if (Offset > 0) {
2116 Expected<uint64_t> MaybeCurrentBit = jumpToValueSymbolTable(Offset, Stream);
2117 if (!MaybeCurrentBit)
2118 return MaybeCurrentBit.takeError();
2119 CurrentBit = MaybeCurrentBit.get();
2120 // If this module uses a string table, read this as a module-level VST.
2121 if (UseStrtab) {
2122 if (Error Err = parseGlobalValueSymbolTable())
2123 return Err;
2124 if (Error JumpFailed = Stream.JumpToBit(CurrentBit))
2125 return JumpFailed;
2126 return Error::success();
2127 }
2128 // Otherwise, the VST will be in a similar format to a function-level VST,
2129 // and will contain symbol names.
2130 }
2131
2132 // Compute the delta between the bitcode indices in the VST (the word offset
2133 // to the word-aligned ENTER_SUBBLOCK for the function block, and that
2134 // expected by the lazy reader. The reader's EnterSubBlock expects to have
2135 // already read the ENTER_SUBBLOCK code (size getAbbrevIDWidth) and BlockID
2136 // (size BlockIDWidth). Note that we access the stream's AbbrevID width here
2137 // just before entering the VST subblock because: 1) the EnterSubBlock
2138 // changes the AbbrevID width; 2) the VST block is nested within the same
2139 // outer MODULE_BLOCK as the FUNCTION_BLOCKs and therefore have the same
2140 // AbbrevID width before calling EnterSubBlock; and 3) when we want to
2141 // jump to the FUNCTION_BLOCK using this offset later, we don't want
2142 // to rely on the stream's AbbrevID width being that of the MODULE_BLOCK.
2143 unsigned FuncBitcodeOffsetDelta =
2144 Stream.getAbbrevIDWidth() + bitc::BlockIDWidth;
2145
2146 if (Error Err = Stream.EnterSubBlock(bitc::VALUE_SYMTAB_BLOCK_ID))
2147 return Err;
2148
2149 SmallVector<uint64_t, 64> Record;
2150
2151 Triple TT(TheModule->getTargetTriple());
2152
2153 // Read all the records for this value table.
2154 SmallString<128> ValueName;
2155
2156 while (true) {
2157 Expected<BitstreamEntry> MaybeEntry = Stream.advanceSkippingSubblocks();
2158 if (!MaybeEntry)
2159 return MaybeEntry.takeError();
2160 BitstreamEntry Entry = MaybeEntry.get();
2161
2162 switch (Entry.Kind) {
2163 case BitstreamEntry::SubBlock: // Handled for us already.
2164 case BitstreamEntry::Error:
2165 return error("Malformed block");
2166 case BitstreamEntry::EndBlock:
2167 if (Offset > 0)
2168 if (Error JumpFailed = Stream.JumpToBit(CurrentBit))
2169 return JumpFailed;
2170 return Error::success();
2171 case BitstreamEntry::Record:
2172 // The interesting case.
2173 break;
2174 }
2175
2176 // Read a record.
2177 Record.clear();
2178 Expected<unsigned> MaybeRecord = Stream.readRecord(Entry.ID, Record);
2179 if (!MaybeRecord)
2180 return MaybeRecord.takeError();
2181 switch (MaybeRecord.get()) {
2182 default: // Default behavior: unknown type.
2183 break;
2184 case bitc::VST_CODE_ENTRY: { // VST_CODE_ENTRY: [valueid, namechar x N]
2185 Expected<Value *> ValOrErr = recordValue(Record, 1, TT);
2186 if (Error Err = ValOrErr.takeError())
2187 return Err;
2188 ValOrErr.get();
2189 break;
2190 }
2191 case bitc::VST_CODE_FNENTRY: {
2192 // VST_CODE_FNENTRY: [valueid, offset, namechar x N]
2193 Expected<Value *> ValOrErr = recordValue(Record, 2, TT);
2194 if (Error Err = ValOrErr.takeError())
2195 return Err;
2196 Value *V = ValOrErr.get();
2197
2198 // Ignore function offsets emitted for aliases of functions in older
2199 // versions of LLVM.
2200 if (auto *F = dyn_cast<Function>(V))
2201 setDeferredFunctionInfo(FuncBitcodeOffsetDelta, F, Record);
2202 break;
2203 }
2204 case bitc::VST_CODE_BBENTRY: {
2205 if (convertToString(Record, 1, ValueName))
2206 return error("Invalid record");
2207 BasicBlock *BB = getBasicBlock(Record[0]);
2208 if (!BB)
2209 return error("Invalid record");
2210
2211 BB->setName(StringRef(ValueName.data(), ValueName.size()));
2212 ValueName.clear();
2213 break;
2214 }
2215 }
2216 }
2217}
2218
2219/// Decode a signed value stored with the sign bit in the LSB for dense VBR
2220/// encoding.
2221uint64_t BitcodeReader::decodeSignRotatedValue(uint64_t V) {
2222 if ((V & 1) == 0)
2223 return V >> 1;
2224 if (V != 1)
2225 return -(V >> 1);
2226 // There is no such thing as -0 with integers. "-0" really means MININT.
2227 return 1ULL << 63;
2228}
2229
2230/// Resolve all of the initializers for global values and aliases that we can.
2231Error BitcodeReader::resolveGlobalAndIndirectSymbolInits() {
2232 std::vector<std::pair<GlobalVariable *, unsigned>> GlobalInitWorklist;
2233 std::vector<std::pair<GlobalIndirectSymbol *, unsigned>>
2234 IndirectSymbolInitWorklist;
2235 std::vector<std::pair<Function *, unsigned>> FunctionPrefixWorklist;
2236 std::vector<std::pair<Function *, unsigned>> FunctionPrologueWorklist;
2237 std::vector<std::pair<Function *, unsigned>> FunctionPersonalityFnWorklist;
2238
2239 GlobalInitWorklist.swap(GlobalInits);
2240 IndirectSymbolInitWorklist.swap(IndirectSymbolInits);
2241 FunctionPrefixWorklist.swap(FunctionPrefixes);
2242 FunctionPrologueWorklist.swap(FunctionPrologues);
2243 FunctionPersonalityFnWorklist.swap(FunctionPersonalityFns);
2244
2245 while (!GlobalInitWorklist.empty()) {
2246 unsigned ValID = GlobalInitWorklist.back().second;
2247 if (ValID >= ValueList.size()) {
2248 // Not ready to resolve this yet, it requires something later in the file.
2249 GlobalInits.push_back(GlobalInitWorklist.back());
2250 } else {
2251 if (Constant *C = dyn_cast_or_null<Constant>(ValueList[ValID]))
2252 GlobalInitWorklist.back().first->setInitializer(C);
2253 else
2254 return error("Expected a constant");
2255 }
2256 GlobalInitWorklist.pop_back();
2257 }
2258
2259 while (!IndirectSymbolInitWorklist.empty()) {
2260 unsigned ValID = IndirectSymbolInitWorklist.back().second;
2261 if (ValID >= ValueList.size()) {
2262 IndirectSymbolInits.push_back(IndirectSymbolInitWorklist.back());
2263 } else {
2264 Constant *C = dyn_cast_or_null<Constant>(ValueList[ValID]);
2265 if (!C)
2266 return error("Expected a constant");
2267 GlobalIndirectSymbol *GIS = IndirectSymbolInitWorklist.back().first;
2268 if (isa<GlobalAlias>(GIS) && C->getType() != GIS->getType())
2269 return error("Alias and aliasee types don't match");
2270 GIS->setIndirectSymbol(C);
2271 }
2272 IndirectSymbolInitWorklist.pop_back();
2273 }
2274
2275 while (!FunctionPrefixWorklist.empty()) {
2276 unsigned ValID = FunctionPrefixWorklist.back().second;
2277 if (ValID >= ValueList.size()) {
2278 FunctionPrefixes.push_back(FunctionPrefixWorklist.back());
2279 } else {
2280 if (Constant *C = dyn_cast_or_null<Constant>(ValueList[ValID]))
2281 FunctionPrefixWorklist.back().first->setPrefixData(C);
2282 else
2283 return error("Expected a constant");
2284 }
2285 FunctionPrefixWorklist.pop_back();
2286 }
2287
2288 while (!FunctionPrologueWorklist.empty()) {
2289 unsigned ValID = FunctionPrologueWorklist.back().second;
2290 if (ValID >= ValueList.size()) {
2291 FunctionPrologues.push_back(FunctionPrologueWorklist.back());
2292 } else {
2293 if (Constant *C = dyn_cast_or_null<Constant>(ValueList[ValID]))
2294 FunctionPrologueWorklist.back().first->setPrologueData(C);
2295 else
2296 return error("Expected a constant");
2297 }
2298 FunctionPrologueWorklist.pop_back();
2299 }
2300
2301 while (!FunctionPersonalityFnWorklist.empty()) {
2302 unsigned ValID = FunctionPersonalityFnWorklist.back().second;
2303 if (ValID >= ValueList.size()) {
2304 FunctionPersonalityFns.push_back(FunctionPersonalityFnWorklist.back());
2305 } else {
2306 if (Constant *C = dyn_cast_or_null<Constant>(ValueList[ValID]))
2307 FunctionPersonalityFnWorklist.back().first->setPersonalityFn(C);
2308 else
2309 return error("Expected a constant");
2310 }
2311 FunctionPersonalityFnWorklist.pop_back();
2312 }
2313
2314 return Error::success();
2315}
2316
2317static APInt readWideAPInt(ArrayRef<uint64_t> Vals, unsigned TypeBits) {
2318 SmallVector<uint64_t, 8> Words(Vals.size());
2319 transform(Vals, Words.begin(),
2320 BitcodeReader::decodeSignRotatedValue);
2321
2322 return APInt(TypeBits, Words);
2323}
2324
2325Error BitcodeReader::parseConstants() {
2326 if (Error Err = Stream.EnterSubBlock(bitc::CONSTANTS_BLOCK_ID))
2327 return Err;
2328
2329 SmallVector<uint64_t, 64> Record;
2330
2331 // Read all the records for this value table.
2332 Type *CurTy = Type::getInt32Ty(Context);
2333 Type *CurFullTy = Type::getInt32Ty(Context);
2334 unsigned NextCstNo = ValueList.size();
2335
2336 while (true) {
2337 Expected<BitstreamEntry> MaybeEntry = Stream.advanceSkippingSubblocks();
2338 if (!MaybeEntry)
2339 return MaybeEntry.takeError();
2340 BitstreamEntry Entry = MaybeEntry.get();
2341
2342 switch (Entry.Kind) {
2343 case BitstreamEntry::SubBlock: // Handled for us already.
2344 case BitstreamEntry::Error:
2345 return error("Malformed block");
2346 case BitstreamEntry::EndBlock:
2347 if (NextCstNo != ValueList.size())
2348 return error("Invalid constant reference");
2349
2350 // Once all the constants have been read, go through and resolve forward
2351 // references.
2352 ValueList.resolveConstantForwardRefs();
2353 return Error::success();
2354 case BitstreamEntry::Record:
2355 // The interesting case.
2356 break;
2357 }
2358
2359 // Read a record.
2360 Record.clear();
2361 Type *VoidType = Type::getVoidTy(Context);
2362 Value *V = nullptr;
2363 Expected<unsigned> MaybeBitCode = Stream.readRecord(Entry.ID, Record);
2364 if (!MaybeBitCode)
2365 return MaybeBitCode.takeError();
2366 switch (unsigned BitCode = MaybeBitCode.get()) {
2367 default: // Default behavior: unknown constant
2368 case bitc::CST_CODE_UNDEF: // UNDEF
2369 V = UndefValue::get(CurTy);
2370 break;
2371 case bitc::CST_CODE_SETTYPE: // SETTYPE: [typeid]
2372 if (Record.empty())
2373 return error("Invalid record");
2374 if (Record[0] >= TypeList.size() || !TypeList[Record[0]])
2375 return error("Invalid record");
2376 if (TypeList[Record[0]] == VoidType)
2377 return error("Invalid constant type");
2378 CurFullTy = TypeList[Record[0]];
2379 CurTy = flattenPointerTypes(CurFullTy);
2380 continue; // Skip the ValueList manipulation.
2381 case bitc::CST_CODE_NULL: // NULL
2382 if (CurTy->isVoidTy() || CurTy->isFunctionTy() || CurTy->isLabelTy())
2383 return error("Invalid type for a constant null value");
2384 V = Constant::getNullValue(CurTy);
2385 break;
2386 case bitc::CST_CODE_INTEGER: // INTEGER: [intval]
2387 if (!CurTy->isIntegerTy() || Record.empty())
2388 return error("Invalid record");
2389 V = ConstantInt::get(CurTy, decodeSignRotatedValue(Record[0]));
2390 break;
2391 case bitc::CST_CODE_WIDE_INTEGER: {// WIDE_INTEGER: [n x intval]
2392 if (!CurTy->isIntegerTy() || Record.empty())
2393 return error("Invalid record");
2394
2395 APInt VInt =
2396 readWideAPInt(Record, cast<IntegerType>(CurTy)->getBitWidth());
2397 V = ConstantInt::get(Context, VInt);
2398
2399 break;
2400 }
2401 case bitc::CST_CODE_FLOAT: { // FLOAT: [fpval]
2402 if (Record.empty())
2403 return error("Invalid record");
2404 if (CurTy->isHalfTy())
2405 V = ConstantFP::get(Context, APFloat(APFloat::IEEEhalf(),
2406 APInt(16, (uint16_t)Record[0])));
2407 else if (CurTy->isFloatTy())
2408 V = ConstantFP::get(Context, APFloat(APFloat::IEEEsingle(),
2409 APInt(32, (uint32_t)Record[0])));
2410 else if (CurTy->isDoubleTy())
2411 V = ConstantFP::get(Context, APFloat(APFloat::IEEEdouble(),
2412 APInt(64, Record[0])));
2413 else if (CurTy->isX86_FP80Ty()) {
2414 // Bits are not stored the same way as a normal i80 APInt, compensate.
2415 uint64_t Rearrange[2];
2416 Rearrange[0] = (Record[1] & 0xffffLL) | (Record[0] << 16);
2417 Rearrange[1] = Record[0] >> 48;
2418 V = ConstantFP::get(Context, APFloat(APFloat::x87DoubleExtended(),
2419 APInt(80, Rearrange)));
2420 } else if (CurTy->isFP128Ty())
2421 V = ConstantFP::get(Context, APFloat(APFloat::IEEEquad(),
2422 APInt(128, Record)));
2423 else if (CurTy->isPPC_FP128Ty())
2424 V = ConstantFP::get(Context, APFloat(APFloat::PPCDoubleDouble(),
2425 APInt(128, Record)));
2426 else
2427 V = UndefValue::get(CurTy);
2428 break;
2429 }
2430
2431 case bitc::CST_CODE_AGGREGATE: {// AGGREGATE: [n x value number]
2432 if (Record.empty())
2433 return error("Invalid record");
2434
2435 unsigned Size = Record.size();
2436 SmallVector<Constant*, 16> Elts;
2437
2438 if (StructType *STy = dyn_cast<StructType>(CurTy)) {
2439 for (unsigned i = 0; i != Size; ++i)
2440 Elts.push_back(ValueList.getConstantFwdRef(Record[i],
2441 STy->getElementType(i)));
2442 V = ConstantStruct::get(STy, Elts);
2443 } else if (ArrayType *ATy = dyn_cast<ArrayType>(CurTy)) {
2444 Type *EltTy = ATy->getElementType();
2445 for (unsigned i = 0; i != Size; ++i)
2446 Elts.push_back(ValueList.getConstantFwdRef(Record[i], EltTy));
2447 V = ConstantArray::get(ATy, Elts);
2448 } else if (VectorType *VTy = dyn_cast<VectorType>(CurTy)) {
2449 Type *EltTy = VTy->getElementType();
2450 for (unsigned i = 0; i != Size; ++i)
2451 Elts.push_back(ValueList.getConstantFwdRef(Record[i], EltTy));
2452 V = ConstantVector::get(Elts);
2453 } else {
2454 V = UndefValue::get(CurTy);
2455 }
2456 break;
2457 }
2458 case bitc::CST_CODE_STRING: // STRING: [values]
2459 case bitc::CST_CODE_CSTRING: { // CSTRING: [values]
2460 if (Record.empty())
2461 return error("Invalid record");
2462
2463 SmallString<16> Elts(Record.begin(), Record.end());
2464 V = ConstantDataArray::getString(Context, Elts,
2465 BitCode == bitc::CST_CODE_CSTRING);
2466 break;
2467 }
2468 case bitc::CST_CODE_DATA: {// DATA: [n x value]
2469 if (Record.empty())
2470 return error("Invalid record");
2471
2472 Type *EltTy = cast<SequentialType>(CurTy)->getElementType();
2473 if (EltTy->isIntegerTy(8)) {
2474 SmallVector<uint8_t, 16> Elts(Record.begin(), Record.end());
2475 if (isa<VectorType>(CurTy))
2476 V = ConstantDataVector::get(Context, Elts);
2477 else
2478 V = ConstantDataArray::get(Context, Elts);
2479 } else if (EltTy->isIntegerTy(16)) {
2480 SmallVector<uint16_t, 16> Elts(Record.begin(), Record.end());
2481 if (isa<VectorType>(CurTy))
2482 V = ConstantDataVector::get(Context, Elts);
2483 else
2484 V = ConstantDataArray::get(Context, Elts);
2485 } else if (EltTy->isIntegerTy(32)) {
2486 SmallVector<uint32_t, 16> Elts(Record.begin(), Record.end());
2487 if (isa<VectorType>(CurTy))
2488 V = ConstantDataVector::get(Context, Elts);
2489 else
2490 V = ConstantDataArray::get(Context, Elts);
2491 } else if (EltTy->isIntegerTy(64)) {
2492 SmallVector<uint64_t, 16> Elts(Record.begin(), Record.end());
2493 if (isa<VectorType>(CurTy))
2494 V = ConstantDataVector::get(Context, Elts);
2495 else
2496 V = ConstantDataArray::get(Context, Elts);
2497 } else if (EltTy->isHalfTy()) {
2498 SmallVector<uint16_t, 16> Elts(Record.begin(), Record.end());
2499 if (isa<VectorType>(CurTy))
2500 V = ConstantDataVector::getFP(Context, Elts);
2501 else
2502 V = ConstantDataArray::getFP(Context, Elts);
2503 } else if (EltTy->isFloatTy()) {
2504 SmallVector<uint32_t, 16> Elts(Record.begin(), Record.end());
2505 if (isa<VectorType>(CurTy))
2506 V = ConstantDataVector::getFP(Context, Elts);
2507 else
2508 V = ConstantDataArray::getFP(Context, Elts);
2509 } else if (EltTy->isDoubleTy()) {
2510 SmallVector<uint64_t, 16> Elts(Record.begin(), Record.end());
2511 if (isa<VectorType>(CurTy))
2512 V = ConstantDataVector::getFP(Context, Elts);
2513 else
2514 V = ConstantDataArray::getFP(Context, Elts);
2515 } else {
2516 return error("Invalid type for value");
2517 }
2518 break;
2519 }
2520 case bitc::CST_CODE_CE_UNOP: { // CE_UNOP: [opcode, opval]
2521 if (Record.size() < 2)
2522 return error("Invalid record");
2523 int Opc = getDecodedUnaryOpcode(Record[0], CurTy);
2524 if (Opc < 0) {
2525 V = UndefValue::get(CurTy); // Unknown unop.
2526 } else {
2527 Constant *LHS = ValueList.getConstantFwdRef(Record[1], CurTy);
2528 unsigned Flags = 0;
2529 V = ConstantExpr::get(Opc, LHS, Flags);
2530 }
2531 break;
2532 }
2533 case bitc::CST_CODE_CE_BINOP: { // CE_BINOP: [opcode, opval, opval]
2534 if (Record.size() < 3)
2535 return error("Invalid record");
2536 int Opc = getDecodedBinaryOpcode(Record[0], CurTy);
2537 if (Opc < 0) {
2538 V = UndefValue::get(CurTy); // Unknown binop.
2539 } else {
2540 Constant *LHS = ValueList.getConstantFwdRef(Record[1], CurTy);
2541 Constant *RHS = ValueList.getConstantFwdRef(Record[2], CurTy);
2542 unsigned Flags = 0;
2543 if (Record.size() >= 4) {
2544 if (Opc == Instruction::Add ||
2545 Opc == Instruction::Sub ||
2546 Opc == Instruction::Mul ||
2547 Opc == Instruction::Shl) {
2548 if (Record[3] & (1 << bitc::OBO_NO_SIGNED_WRAP))
2549 Flags |= OverflowingBinaryOperator::NoSignedWrap;
2550 if (Record[3] & (1 << bitc::OBO_NO_UNSIGNED_WRAP))
2551 Flags |= OverflowingBinaryOperator::NoUnsignedWrap;
2552 } else if (Opc == Instruction::SDiv ||
2553 Opc == Instruction::UDiv ||
2554 Opc == Instruction::LShr ||
2555 Opc == Instruction::AShr) {
2556 if (Record[3] & (1 << bitc::PEO_EXACT))
2557 Flags |= SDivOperator::IsExact;
2558 }
2559 }
2560 V = ConstantExpr::get(Opc, LHS, RHS, Flags);
2561 }
2562 break;
2563 }
2564 case bitc::CST_CODE_CE_CAST: { // CE_CAST: [opcode, opty, opval]
2565 if (Record.size() < 3)
2566 return error("Invalid record");
2567 int Opc = getDecodedCastOpcode(Record[0]);
2568 if (Opc < 0) {
2569 V = UndefValue::get(CurTy); // Unknown cast.
2570 } else {
2571 Type *OpTy = getTypeByID(Record[1]);
2572 if (!OpTy)
2573 return error("Invalid record");
2574 Constant *Op = ValueList.getConstantFwdRef(Record[2], OpTy);
2575 V = UpgradeBitCastExpr(Opc, Op, CurTy);
2576 if (!V) V = ConstantExpr::getCast(Opc, Op, CurTy);
2577 }
2578 break;
2579 }
2580 case bitc::CST_CODE_CE_INBOUNDS_GEP: // [ty, n x operands]
2581 case bitc::CST_CODE_CE_GEP: // [ty, n x operands]
2582 case bitc::CST_CODE_CE_GEP_WITH_INRANGE_INDEX: { // [ty, flags, n x
2583 // operands]
2584 unsigned OpNum = 0;
2585 Type *PointeeType = nullptr;
2586 if (BitCode == bitc::CST_CODE_CE_GEP_WITH_INRANGE_INDEX ||
2587 Record.size() % 2)
2588 PointeeType = getTypeByID(Record[OpNum++]);
2589
2590 bool InBounds = false;
2591 Optional<unsigned> InRangeIndex;
2592 if (BitCode == bitc::CST_CODE_CE_GEP_WITH_INRANGE_INDEX) {
2593 uint64_t Op = Record[OpNum++];
2594 InBounds = Op & 1;
2595 InRangeIndex = Op >> 1;
2596 } else if (BitCode == bitc::CST_CODE_CE_INBOUNDS_GEP)
2597 InBounds = true;
2598
2599 SmallVector<Constant*, 16> Elts;
2600 Type *Elt0FullTy = nullptr;
2601 while (OpNum != Record.size()) {
2602 if (!Elt0FullTy)
2603 Elt0FullTy = getFullyStructuredTypeByID(Record[OpNum]);
2604 Type *ElTy = getTypeByID(Record[OpNum++]);
2605 if (!ElTy)
2606 return error("Invalid record");
2607 Elts.push_back(ValueList.getConstantFwdRef(Record[OpNum++], ElTy));
2608 }
2609
2610 if (Elts.size() < 1)
2611 return error("Invalid gep with no operands");
2612
2613 Type *ImplicitPointeeType =
2614 getPointerElementFlatType(Elt0FullTy->getScalarType());
2615 if (!PointeeType)
2616 PointeeType = ImplicitPointeeType;
2617 else if (PointeeType != ImplicitPointeeType)
2618 return error("Explicit gep operator type does not match pointee type "
2619 "of pointer operand");
2620
2621 ArrayRef<Constant *> Indices(Elts.begin() + 1, Elts.end());
2622 V = ConstantExpr::getGetElementPtr(PointeeType, Elts[0], Indices,
2623 InBounds, InRangeIndex);
2624 break;
2625 }
2626 case bitc::CST_CODE_CE_SELECT: { // CE_SELECT: [opval#, opval#, opval#]
2627 if (Record.size() < 3)
2628 return error("Invalid record");
2629
2630 Type *SelectorTy = Type::getInt1Ty(Context);
2631
2632 // The selector might be an i1 or an <n x i1>
2633 // Get the type from the ValueList before getting a forward ref.
2634 if (VectorType *VTy = dyn_cast<VectorType>(CurTy))
2635 if (Value *V = ValueList[Record[0]])
2636 if (SelectorTy != V->getType())
2637 SelectorTy = VectorType::get(SelectorTy, VTy->getNumElements());
2638
2639 V = ConstantExpr::getSelect(ValueList.getConstantFwdRef(Record[0],
2640 SelectorTy),
2641 ValueList.getConstantFwdRef(Record[1],CurTy),
2642 ValueList.getConstantFwdRef(Record[2],CurTy));
2643 break;
2644 }
2645 case bitc::CST_CODE_CE_EXTRACTELT
2646 : { // CE_EXTRACTELT: [opty, opval, opty, opval]
2647 if (Record.size() < 3)
2648 return error("Invalid record");
2649 VectorType *OpTy =
2650 dyn_cast_or_null<VectorType>(getTypeByID(Record[0]));
2651 if (!OpTy)
2652 return error("Invalid record");
2653 Constant *Op0 = ValueList.getConstantFwdRef(Record[1], OpTy);
2654 Constant *Op1 = nullptr;
2655 if (Record.size() == 4) {
2656 Type *IdxTy = getTypeByID(Record[2]);
2657 if (!IdxTy)
2658 return error("Invalid record");
2659 Op1 = ValueList.getConstantFwdRef(Record[3], IdxTy);
2660 } else // TODO: Remove with llvm 4.0
2661 Op1 = ValueList.getConstantFwdRef(Record[2], Type::getInt32Ty(Context));
2662 if (!Op1)
2663 return error("Invalid record");
2664 V = ConstantExpr::getExtractElement(Op0, Op1);
2665 break;
2666 }
2667 case bitc::CST_CODE_CE_INSERTELT
2668 : { // CE_INSERTELT: [opval, opval, opty, opval]
2669 VectorType *OpTy = dyn_cast<VectorType>(CurTy);
2670 if (Record.size() < 3 || !OpTy)
2671 return error("Invalid record");
2672 Constant *Op0 = ValueList.getConstantFwdRef(Record[0], OpTy);
2673 Constant *Op1 = ValueList.getConstantFwdRef(Record[1],
2674 OpTy->getElementType());
2675 Constant *Op2 = nullptr;
2676 if (Record.size() == 4) {
2677 Type *IdxTy = getTypeByID(Record[2]);
2678 if (!IdxTy)
2679 return error("Invalid record");
2680 Op2 = ValueList.getConstantFwdRef(Record[3], IdxTy);
2681 } else // TODO: Remove with llvm 4.0
2682 Op2 = ValueList.getConstantFwdRef(Record[2], Type::getInt32Ty(Context));
2683 if (!Op2)
2684 return error("Invalid record");
2685 V = ConstantExpr::getInsertElement(Op0, Op1, Op2);
2686 break;
2687 }
2688 case bitc::CST_CODE_CE_SHUFFLEVEC: { // CE_SHUFFLEVEC: [opval, opval, opval]
2689 VectorType *OpTy = dyn_cast<VectorType>(CurTy);
2690 if (Record.size() < 3 || !OpTy)
2691 return error("Invalid record");
2692 Constant *Op0 = ValueList.getConstantFwdRef(Record[0], OpTy);
2693 Constant *Op1 = ValueList.getConstantFwdRef(Record[1], OpTy);
2694 Type *ShufTy = VectorType::get(Type::getInt32Ty(Context),
2695 OpTy->getNumElements());
2696 Constant *Op2 = ValueList.getConstantFwdRef(Record[2], ShufTy);
2697 V = ConstantExpr::getShuffleVector(Op0, Op1, Op2);
2698 break;
2699 }
2700 case bitc::CST_CODE_CE_SHUFVEC_EX: { // [opty, opval, opval, opval]
2701 VectorType *RTy = dyn_cast<VectorType>(CurTy);
2702 VectorType *OpTy =
2703 dyn_cast_or_null<VectorType>(getTypeByID(Record[0]));
2704 if (Record.size() < 4 || !RTy || !OpTy)
2705 return error("Invalid record");
2706 Constant *Op0 = ValueList.getConstantFwdRef(Record[1], OpTy);
2707 Constant *Op1 = ValueList.getConstantFwdRef(Record[2], OpTy);
2708 Type *ShufTy = VectorType::get(Type::getInt32Ty(Context),
2709 RTy->getNumElements());
2710 Constant *Op2 = ValueList.getConstantFwdRef(Record[3], ShufTy);
2711 V = ConstantExpr::getShuffleVector(Op0, Op1, Op2);
2712 break;
2713 }
2714 case bitc::CST_CODE_CE_CMP: { // CE_CMP: [opty, opval, opval, pred]
2715 if (Record.size() < 4)
2716 return error("Invalid record");
2717 Type *OpTy = getTypeByID(Record[0]);
2718 if (!OpTy)
2719 return error("Invalid record");
2720 Constant *Op0 = ValueList.getConstantFwdRef(Record[1], OpTy);
2721 Constant *Op1 = ValueList.getConstantFwdRef(Record[2], OpTy);
2722
2723 if (OpTy->isFPOrFPVectorTy())
2724 V = ConstantExpr::getFCmp(Record[3], Op0, Op1);
2725 else
2726 V = ConstantExpr::getICmp(Record[3], Op0, Op1);
2727 break;
2728 }
2729 // This maintains backward compatibility, pre-asm dialect keywords.
2730 // FIXME: Remove with the 4.0 release.
2731 case bitc::CST_CODE_INLINEASM_OLD: {
2732 if (Record.size() < 2)
2733 return error("Invalid record");
2734 std::string AsmStr, ConstrStr;
2735 bool HasSideEffects = Record[0] & 1;
2736 bool IsAlignStack = Record[0] >> 1;
2737 unsigned AsmStrSize = Record[1];
2738 if (2+AsmStrSize >= Record.size())
2739 return error("Invalid record");
2740 unsigned ConstStrSize = Record[2+AsmStrSize];
2741 if (3+AsmStrSize+ConstStrSize > Record.size())
2742 return error("Invalid record");
2743
2744 for (unsigned i = 0; i != AsmStrSize; ++i)
2745 AsmStr += (char)Record[2+i];
2746 for (unsigned i = 0; i != ConstStrSize; ++i)
2747 ConstrStr += (char)Record[3+AsmStrSize+i];
2748 UpgradeInlineAsmString(&AsmStr);
2749 V = InlineAsm::get(
2750 cast<FunctionType>(getPointerElementFlatType(CurFullTy)), AsmStr,
2751 ConstrStr, HasSideEffects, IsAlignStack);
2752 break;
2753 }
2754 // This version adds support for the asm dialect keywords (e.g.,
2755 // inteldialect).
2756 case bitc::CST_CODE_INLINEASM: {
2757 if (Record.size() < 2)
2758 return error("Invalid record");
2759 std::string AsmStr, ConstrStr;
2760 bool HasSideEffects = Record[0] & 1;
2761 bool IsAlignStack = (Record[0] >> 1) & 1;
2762 unsigned AsmDialect = Record[0] >> 2;
2763 unsigned AsmStrSize = Record[1];
2764 if (2+AsmStrSize >= Record.size())
2765 return error("Invalid record");
2766 unsigned ConstStrSize = Record[2+AsmStrSize];
2767 if (3+AsmStrSize+ConstStrSize > Record.size())
2768 return error("Invalid record");
2769
2770 for (unsigned i = 0; i != AsmStrSize; ++i)
2771 AsmStr += (char)Record[2+i];
2772 for (unsigned i = 0; i != ConstStrSize; ++i)
2773 ConstrStr += (char)Record[3+AsmStrSize+i];
2774 UpgradeInlineAsmString(&AsmStr);
2775 V = InlineAsm::get(
2776 cast<FunctionType>(getPointerElementFlatType(CurFullTy)), AsmStr,
2777 ConstrStr, HasSideEffects, IsAlignStack,
2778 InlineAsm::AsmDialect(AsmDialect));
2779 break;
2780 }
2781 case bitc::CST_CODE_BLOCKADDRESS:{
2782 if (Record.size() < 3)
2783 return error("Invalid record");
2784 Type *FnTy = getTypeByID(Record[0]);
2785 if (!FnTy)
2786 return error("Invalid record");
2787 Function *Fn =
2788 dyn_cast_or_null<Function>(ValueList.getConstantFwdRef(Record[1],FnTy));
2789 if (!Fn)
2790 return error("Invalid record");
2791
2792 // If the function is already parsed we can insert the block address right
2793 // away.
2794 BasicBlock *BB;
2795 unsigned BBID = Record[2];
2796 if (!BBID)
2797 // Invalid reference to entry block.
2798 return error("Invalid ID");
2799 if (!Fn->empty()) {
2800 Function::iterator BBI = Fn->begin(), BBE = Fn->end();
2801 for (size_t I = 0, E = BBID; I != E; ++I) {
2802 if (BBI == BBE)
2803 return error("Invalid ID");
2804 ++BBI;
2805 }
2806 BB = &*BBI;
2807 } else {
2808 // Otherwise insert a placeholder and remember it so it can be inserted
2809 // when the function is parsed.
2810 auto &FwdBBs = BasicBlockFwdRefs[Fn];
2811 if (FwdBBs.empty())
2812 BasicBlockFwdRefQueue.push_back(Fn);
2813 if (FwdBBs.size() < BBID + 1)
2814 FwdBBs.resize(BBID + 1);
2815 if (!FwdBBs[BBID])
2816 FwdBBs[BBID] = BasicBlock::Create(Context);
2817 BB = FwdBBs[BBID];
2818 }
2819 V = BlockAddress::get(Fn, BB);
2820 break;
2821 }
2822 }
2823
2824 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-10~++20200112100611+7fa5290d5bd/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 2825, __PRETTY_FUNCTION__))
2825 "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-10~++20200112100611+7fa5290d5bd/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 2825, __PRETTY_FUNCTION__))
;
2826 ValueList.assignValue(V, NextCstNo, CurFullTy);
2827 ++NextCstNo;
2828 }
2829}
2830
2831Error BitcodeReader::parseUseLists() {
2832 if (Error Err = Stream.EnterSubBlock(bitc::USELIST_BLOCK_ID))
2833 return Err;
2834
2835 // Read all the records.
2836 SmallVector<uint64_t, 64> Record;
2837
2838 while (true) {
2839 Expected<BitstreamEntry> MaybeEntry = Stream.advanceSkippingSubblocks();
2840 if (!MaybeEntry)
2841 return MaybeEntry.takeError();
2842 BitstreamEntry Entry = MaybeEntry.get();
2843
2844 switch (Entry.Kind) {
2845 case BitstreamEntry::SubBlock: // Handled for us already.
2846 case BitstreamEntry::Error:
2847 return error("Malformed block");
2848 case BitstreamEntry::EndBlock:
2849 return Error::success();
2850 case BitstreamEntry::Record:
2851 // The interesting case.
2852 break;
2853 }
2854
2855 // Read a use list record.
2856 Record.clear();
2857 bool IsBB = false;
2858 Expected<unsigned> MaybeRecord = Stream.readRecord(Entry.ID, Record);
2859 if (!MaybeRecord)
2860 return MaybeRecord.takeError();
2861 switch (MaybeRecord.get()) {
2862 default: // Default behavior: unknown type.
2863 break;
2864 case bitc::USELIST_CODE_BB:
2865 IsBB = true;
2866 LLVM_FALLTHROUGH[[gnu::fallthrough]];
2867 case bitc::USELIST_CODE_DEFAULT: {
2868 unsigned RecordLength = Record.size();
2869 if (RecordLength < 3)
2870 // Records should have at least an ID and two indexes.
2871 return error("Invalid record");
2872 unsigned ID = Record.back();
2873 Record.pop_back();
2874
2875 Value *V;
2876 if (IsBB) {
2877 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-10~++20200112100611+7fa5290d5bd/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 2877, __PRETTY_FUNCTION__))
;
2878 V = FunctionBBs[ID];
2879 } else
2880 V = ValueList[ID];
2881 unsigned NumUses = 0;
2882 SmallDenseMap<const Use *, unsigned, 16> Order;
2883 for (const Use &U : V->materialized_uses()) {
2884 if (++NumUses > Record.size())
2885 break;
2886 Order[&U] = Record[NumUses - 1];
2887 }
2888 if (Order.size() != Record.size() || NumUses > Record.size())
2889 // Mismatches can happen if the functions are being materialized lazily
2890 // (out-of-order), or a value has been upgraded.
2891 break;
2892
2893 V->sortUseList([&](const Use &L, const Use &R) {
2894 return Order.lookup(&L) < Order.lookup(&R);
2895 });
2896 break;
2897 }
2898 }
2899 }
2900}
2901
2902/// When we see the block for metadata, remember where it is and then skip it.
2903/// This lets us lazily deserialize the metadata.
2904Error BitcodeReader::rememberAndSkipMetadata() {
2905 // Save the current stream state.
2906 uint64_t CurBit = Stream.GetCurrentBitNo();
2907 DeferredMetadataInfo.push_back(CurBit);
2908
2909 // Skip over the block for now.
2910 if (Error Err = Stream.SkipBlock())
2911 return Err;
2912 return Error::success();
2913}
2914
2915Error BitcodeReader::materializeMetadata() {
2916 for (uint64_t BitPos : DeferredMetadataInfo) {
2917 // Move the bit stream to the saved position.
2918 if (Error JumpFailed = Stream.JumpToBit(BitPos))
2919 return JumpFailed;
2920 if (Error Err = MDLoader->parseModuleMetadata())
2921 return Err;
2922 }
2923
2924 // Upgrade "Linker Options" module flag to "llvm.linker.options" module-level
2925 // metadata.
2926 if (Metadata *Val = TheModule->getModuleFlag("Linker Options")) {
2927 NamedMDNode *LinkerOpts =
2928 TheModule->getOrInsertNamedMetadata("llvm.linker.options");
2929 for (const MDOperand &MDOptions : cast<MDNode>(Val)->operands())
2930 LinkerOpts->addOperand(cast<MDNode>(MDOptions));
2931 }
2932
2933 DeferredMetadataInfo.clear();
2934 return Error::success();
2935}
2936
2937void BitcodeReader::setStripDebugInfo() { StripDebugInfo = true; }
2938
2939/// When we see the block for a function body, remember where it is and then
2940/// skip it. This lets us lazily deserialize the functions.
2941Error BitcodeReader::rememberAndSkipFunctionBody() {
2942 // Get the function we are talking about.
2943 if (FunctionsWithBodies.empty())
2944 return error("Insufficient function protos");
2945
2946 Function *Fn = FunctionsWithBodies.back();
2947 FunctionsWithBodies.pop_back();
2948
2949 // Save the current stream state.
2950 uint64_t CurBit = Stream.GetCurrentBitNo();
2951 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-10~++20200112100611+7fa5290d5bd/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 2953, __PRETTY_FUNCTION__))
2952 (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-10~++20200112100611+7fa5290d5bd/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 2953, __PRETTY_FUNCTION__))
2953 "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-10~++20200112100611+7fa5290d5bd/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 2953, __PRETTY_FUNCTION__))
;
2954 DeferredFunctionInfo[Fn] = CurBit;
2955
2956 // Skip over the function block for now.
2957 if (Error Err = Stream.SkipBlock())
2958 return Err;
2959 return Error::success();
2960}
2961
2962Error BitcodeReader::globalCleanup() {
2963 // Patch the initializers for globals and aliases up.
2964 if (Error Err = resolveGlobalAndIndirectSymbolInits())
2965 return Err;
2966 if (!GlobalInits.empty() || !IndirectSymbolInits.empty())
2967 return error("Malformed global initializer set");
2968
2969 // Look for intrinsic functions which need to be upgraded at some point
2970 for (Function &F : *TheModule) {
2971 MDLoader->upgradeDebugIntrinsics(F);
2972 Function *NewFn;
2973 if (UpgradeIntrinsicFunction(&F, NewFn))
2974 UpgradedIntrinsics[&F] = NewFn;
2975 else if (auto Remangled = Intrinsic::remangleIntrinsicFunction(&F))
2976 // Some types could be renamed during loading if several modules are
2977 // loaded in the same LLVMContext (LTO scenario). In this case we should
2978 // remangle intrinsics names as well.
2979 RemangledIntrinsics[&F] = Remangled.getValue();
2980 }
2981
2982 // Look for global variables which need to be renamed.
2983 std::vector<std::pair<GlobalVariable *, GlobalVariable *>> UpgradedVariables;
2984 for (GlobalVariable &GV : TheModule->globals())
2985 if (GlobalVariable *Upgraded = UpgradeGlobalVariable(&GV))
2986 UpgradedVariables.emplace_back(&GV, Upgraded);
2987 for (auto &Pair : UpgradedVariables) {
2988 Pair.first->eraseFromParent();
2989 TheModule->getGlobalList().push_back(Pair.second);
2990 }
2991
2992 // Force deallocation of memory for these vectors to favor the client that
2993 // want lazy deserialization.
2994 std::vector<std::pair<GlobalVariable *, unsigned>>().swap(GlobalInits);
2995 std::vector<std::pair<GlobalIndirectSymbol *, unsigned>>().swap(
2996 IndirectSymbolInits);
2997 return Error::success();
2998}
2999
3000/// Support for lazy parsing of function bodies. This is required if we
3001/// either have an old bitcode file without a VST forward declaration record,
3002/// or if we have an anonymous function being materialized, since anonymous
3003/// functions do not have a name and are therefore not in the VST.
3004Error BitcodeReader::rememberAndSkipFunctionBodies() {
3005 if (Error JumpFailed = Stream.JumpToBit(NextUnreadBit))
3006 return JumpFailed;
3007
3008 if (Stream.AtEndOfStream())
3009 return error("Could not find function in stream");
3010
3011 if (!SeenFirstFunctionBody)
3012 return error("Trying to materialize functions before seeing function blocks");
3013
3014 // An old bitcode file with the symbol table at the end would have
3015 // finished the parse greedily.
3016 assert(SeenValueSymbolTable)((SeenValueSymbolTable) ? static_cast<void> (0) : __assert_fail
("SeenValueSymbolTable", "/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 3016, __PRETTY_FUNCTION__))
;
3017
3018 SmallVector<uint64_t, 64> Record;
3019
3020 while (true) {
3021 Expected<llvm::BitstreamEntry> MaybeEntry = Stream.advance();
3022 if (!MaybeEntry)
3023 return MaybeEntry.takeError();
3024 llvm::BitstreamEntry Entry = MaybeEntry.get();
3025
3026 switch (Entry.Kind) {
3027 default:
3028 return error("Expect SubBlock");
3029 case BitstreamEntry::SubBlock:
3030 switch (Entry.ID) {
3031 default:
3032 return error("Expect function block");
3033 case bitc::FUNCTION_BLOCK_ID:
3034 if (Error Err = rememberAndSkipFunctionBody())
3035 return Err;
3036 NextUnreadBit = Stream.GetCurrentBitNo();
3037 return Error::success();
3038 }
3039 }
3040 }
3041}
3042
3043bool BitcodeReaderBase::readBlockInfo() {
3044 Expected<Optional<BitstreamBlockInfo>> MaybeNewBlockInfo =
3045 Stream.ReadBlockInfoBlock();
3046 if (!MaybeNewBlockInfo)
3047 return true; // FIXME Handle the error.
3048 Optional<BitstreamBlockInfo> NewBlockInfo =
3049 std::move(MaybeNewBlockInfo.get());
3050 if (!NewBlockInfo)
3051 return true;
3052 BlockInfo = std::move(*NewBlockInfo);
3053 return false;
3054}
3055
3056Error BitcodeReader::parseComdatRecord(ArrayRef<uint64_t> Record) {
3057 // v1: [selection_kind, name]
3058 // v2: [strtab_offset, strtab_size, selection_kind]
3059 StringRef Name;
3060 std::tie(Name, Record) = readNameFromStrtab(Record);
3061
3062 if (Record.empty())
3063 return error("Invalid record");
3064 Comdat::SelectionKind SK = getDecodedComdatSelectionKind(Record[0]);
3065 std::string OldFormatName;
3066 if (!UseStrtab) {
3067 if (Record.size() < 2)
3068 return error("Invalid record");
3069 unsigned ComdatNameSize = Record[1];
3070 OldFormatName.reserve(ComdatNameSize);
3071 for (unsigned i = 0; i != ComdatNameSize; ++i)
3072 OldFormatName += (char)Record[2 + i];
3073 Name = OldFormatName;
3074 }
3075 Comdat *C = TheModule->getOrInsertComdat(Name);
3076 C->setSelectionKind(SK);
3077 ComdatList.push_back(C);
3078 return Error::success();
3079}
3080
3081static void inferDSOLocal(GlobalValue *GV) {
3082 // infer dso_local from linkage and visibility if it is not encoded.
3083 if (GV->hasLocalLinkage() ||
3084 (!GV->hasDefaultVisibility() && !GV->hasExternalWeakLinkage()))
3085 GV->setDSOLocal(true);
3086}
3087
3088Error BitcodeReader::parseGlobalVarRecord(ArrayRef<uint64_t> Record) {
3089 // v1: [pointer type, isconst, initid, linkage, alignment, section,
3090 // visibility, threadlocal, unnamed_addr, externally_initialized,
3091 // dllstorageclass, comdat, attributes, preemption specifier,
3092 // partition strtab offset, partition strtab size] (name in VST)
3093 // v2: [strtab_offset, strtab_size, v1]
3094 StringRef Name;
3095 std::tie(Name, Record) = readNameFromStrtab(Record);
3096
3097 if (Record.size() < 6)
3098 return error("Invalid record");
3099 Type *FullTy = getFullyStructuredTypeByID(Record[0]);
3100 Type *Ty = flattenPointerTypes(FullTy);
3101 if (!Ty)
3102 return error("Invalid record");
3103 bool isConstant = Record[1] & 1;
3104 bool explicitType = Record[1] & 2;
3105 unsigned AddressSpace;
3106 if (explicitType) {
3107 AddressSpace = Record[1] >> 2;
3108 } else {
3109 if (!Ty->isPointerTy())
3110 return error("Invalid type for value");
3111 AddressSpace = cast<PointerType>(Ty)->getAddressSpace();
3112 std::tie(FullTy, Ty) = getPointerElementTypes(FullTy);
3113 }
3114
3115 uint64_t RawLinkage = Record[3];
3116 GlobalValue::LinkageTypes Linkage = getDecodedLinkage(RawLinkage);
3117 MaybeAlign Alignment;
3118 if (Error Err = parseAlignmentValue(Record[4], Alignment))
3119 return Err;
3120 std::string Section;
3121 if (Record[5]) {
3122 if (Record[5] - 1 >= SectionTable.size())
3123 return error("Invalid ID");
3124 Section = SectionTable[Record[5] - 1];
3125 }
3126 GlobalValue::VisibilityTypes Visibility = GlobalValue::DefaultVisibility;
3127 // Local linkage must have default visibility.
3128 if (Record.size() > 6 && !GlobalValue::isLocalLinkage(Linkage))
3129 // FIXME: Change to an error if non-default in 4.0.
3130 Visibility = getDecodedVisibility(Record[6]);
3131
3132 GlobalVariable::ThreadLocalMode TLM = GlobalVariable::NotThreadLocal;
3133 if (Record.size() > 7)
3134 TLM = getDecodedThreadLocalMode(Record[7]);
3135
3136 GlobalValue::UnnamedAddr UnnamedAddr = GlobalValue::UnnamedAddr::None;
3137 if (Record.size() > 8)
3138 UnnamedAddr = getDecodedUnnamedAddrType(Record[8]);
3139
3140 bool ExternallyInitialized = false;
3141 if (Record.size() > 9)
3142 ExternallyInitialized = Record[9];
3143
3144 GlobalVariable *NewGV =
3145 new GlobalVariable(*TheModule, Ty, isConstant, Linkage, nullptr, Name,
3146 nullptr, TLM, AddressSpace, ExternallyInitialized);
3147 NewGV->setAlignment(Alignment);
3148 if (!Section.empty())
3149 NewGV->setSection(Section);
3150 NewGV->setVisibility(Visibility);
3151 NewGV->setUnnamedAddr(UnnamedAddr);
3152
3153 if (Record.size() > 10)
3154 NewGV->setDLLStorageClass(getDecodedDLLStorageClass(Record[10]));
3155 else
3156 upgradeDLLImportExportLinkage(NewGV, RawLinkage);
3157
3158 FullTy = PointerType::get(FullTy, AddressSpace);
3159 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-10~++20200112100611+7fa5290d5bd/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 3160, __PRETTY_FUNCTION__))
3160 "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-10~++20200112100611+7fa5290d5bd/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 3160, __PRETTY_FUNCTION__))
;
3161 ValueList.push_back(NewGV, FullTy);
3162
3163 // Remember which value to use for the global initializer.
3164 if (unsigned InitID = Record[2])
3165 GlobalInits.push_back(std::make_pair(NewGV, InitID - 1));
3166
3167 if (Record.size() > 11) {
3168 if (unsigned ComdatID = Record[11]) {
3169 if (ComdatID > ComdatList.size())
3170 return error("Invalid global variable comdat ID");
3171 NewGV->setComdat(ComdatList[ComdatID - 1]);
3172 }
3173 } else if (hasImplicitComdat(RawLinkage)) {
3174 NewGV->setComdat(reinterpret_cast<Comdat *>(1));
3175 }
3176
3177 if (Record.size() > 12) {
3178 auto AS = getAttributes(Record[12]).getFnAttributes();
3179 NewGV->setAttributes(AS);
3180 }
3181
3182 if (Record.size() > 13) {
3183 NewGV->setDSOLocal(getDecodedDSOLocal(Record[13]));
3184 }
3185 inferDSOLocal(NewGV);
3186
3187 // Check whether we have enough values to read a partition name.
3188 if (Record.size() > 15)
3189 NewGV->setPartition(StringRef(Strtab.data() + Record[14], Record[15]));
3190
3191 return Error::success();
3192}
3193
3194Error BitcodeReader::parseFunctionRecord(ArrayRef<uint64_t> Record) {
3195 // v1: [type, callingconv, isproto, linkage, paramattr, alignment, section,
3196 // visibility, gc, unnamed_addr, prologuedata, dllstorageclass, comdat,
3197 // prefixdata, personalityfn, preemption specifier, addrspace] (name in VST)
3198 // v2: [strtab_offset, strtab_size, v1]
3199 StringRef Name;
3200 std::tie(Name, Record) = readNameFromStrtab(Record);
3201
3202 if (Record.size() < 8)
3203 return error("Invalid record");
3204 Type *FullFTy = getFullyStructuredTypeByID(Record[0]);
3205 Type *FTy = flattenPointerTypes(FullFTy);
3206 if (!FTy)
3207 return error("Invalid record");
3208 if (isa<PointerType>(FTy))
3209 std::tie(FullFTy, FTy) = getPointerElementTypes(FullFTy);
3210
3211 if (!isa<FunctionType>(FTy))
3212 return error("Invalid type for value");
3213 auto CC = static_cast<CallingConv::ID>(Record[1]);
3214 if (CC & ~CallingConv::MaxID)
3215 return error("Invalid calling convention ID");
3216
3217 unsigned AddrSpace = TheModule->getDataLayout().getProgramAddressSpace();
3218 if (Record.size() > 16)
3219 AddrSpace = Record[16];
3220
3221 Function *Func =
3222 Function::Create(cast<FunctionType>(FTy), GlobalValue::ExternalLinkage,
3223 AddrSpace, Name, TheModule);
3224
3225 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-10~++20200112100611+7fa5290d5bd/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 3226, __PRETTY_FUNCTION__))
3226 "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-10~++20200112100611+7fa5290d5bd/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 3226, __PRETTY_FUNCTION__))
;
3227 FunctionTypes[Func] = cast<FunctionType>(FullFTy);
3228
3229 Func->setCallingConv(CC);
3230 bool isProto = Record[2];
3231 uint64_t RawLinkage = Record[3];
3232 Func->setLinkage(getDecodedLinkage(RawLinkage));
3233 Func->setAttributes(getAttributes(Record[4]));
3234
3235 // Upgrade any old-style byval without a type by propagating the argument's
3236 // pointee type. There should be no opaque pointers where the byval type is
3237 // implicit.
3238 for (unsigned i = 0; i != Func->arg_size(); ++i) {
3239 if (!Func->hasParamAttribute(i, Attribute::ByVal))
3240 continue;
3241
3242 Type *PTy = cast<FunctionType>(FullFTy)->getParamType(i);
3243 Func->removeParamAttr(i, Attribute::ByVal);
3244 Func->addParamAttr(i, Attribute::getWithByValType(
3245 Context, getPointerElementFlatType(PTy)));
3246 }
3247
3248 MaybeAlign Alignment;
3249 if (Error Err = parseAlignmentValue(Record[5], Alignment))
3250 return Err;
3251 Func->setAlignment(Alignment);
3252 if (Record[6]) {
3253 if (Record[6] - 1 >= SectionTable.size())
3254 return error("Invalid ID");
3255 Func->setSection(SectionTable[Record[6] - 1]);
3256 }
3257 // Local linkage must have default visibility.
3258 if (!Func->hasLocalLinkage())
3259 // FIXME: Change to an error if non-default in 4.0.
3260 Func->setVisibility(getDecodedVisibility(Record[7]));
3261 if (Record.size() > 8 && Record[8]) {
3262 if (Record[8] - 1 >= GCTable.size())
3263 return error("Invalid ID");
3264 Func->setGC(GCTable[Record[8] - 1]);
3265 }
3266 GlobalValue::UnnamedAddr UnnamedAddr = GlobalValue::UnnamedAddr::None;
3267 if (Record.size() > 9)
3268 UnnamedAddr = getDecodedUnnamedAddrType(Record[9]);
3269 Func->setUnnamedAddr(UnnamedAddr);
3270 if (Record.size() > 10 && Record[10] != 0)
3271 FunctionPrologues.push_back(std::make_pair(Func, Record[10] - 1));
3272
3273 if (Record.size() > 11)
3274 Func->setDLLStorageClass(getDecodedDLLStorageClass(Record[11]));
3275 else
3276 upgradeDLLImportExportLinkage(Func, RawLinkage);
3277
3278 if (Record.size() > 12) {
3279 if (unsigned ComdatID = Record[12]) {
3280 if (ComdatID > ComdatList.size())
3281 return error("Invalid function comdat ID");
3282 Func->setComdat(ComdatList[ComdatID - 1]);
3283 }
3284 } else if (hasImplicitComdat(RawLinkage)) {
3285 Func->setComdat(reinterpret_cast<Comdat *>(1));
3286 }
3287
3288 if (Record.size() > 13 && Record[13] != 0)
3289 FunctionPrefixes.push_back(std::make_pair(Func, Record[13] - 1));
3290
3291 if (Record.size() > 14 && Record[14] != 0)
3292 FunctionPersonalityFns.push_back(std::make_pair(Func, Record[14] - 1));
3293
3294 if (Record.size() > 15) {
3295 Func->setDSOLocal(getDecodedDSOLocal(Record[15]));
3296 }
3297 inferDSOLocal(Func);
3298
3299 // Record[16] is the address space number.
3300
3301 // Check whether we have enough values to read a partition name.
3302 if (Record.size() > 18)
3303 Func->setPartition(StringRef(Strtab.data() + Record[17], Record[18]));
3304
3305 Type *FullTy = PointerType::get(FullFTy, AddrSpace);
3306 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-10~++20200112100611+7fa5290d5bd/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 3307, __PRETTY_FUNCTION__))
3307 "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-10~++20200112100611+7fa5290d5bd/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 3307, __PRETTY_FUNCTION__))
;
3308 ValueList.push_back(Func, FullTy);
3309
3310 // If this is a function with a body, remember the prototype we are
3311 // creating now, so that we can match up the body with them later.
3312 if (!isProto) {
3313 Func->setIsMaterializable(true);
3314 FunctionsWithBodies.push_back(Func);
3315 DeferredFunctionInfo[Func] = 0;
3316 }
3317 return Error::success();
3318}
3319
3320Error BitcodeReader::parseGlobalIndirectSymbolRecord(
3321 unsigned BitCode, ArrayRef<uint64_t> Record) {
3322 // v1 ALIAS_OLD: [alias type, aliasee val#, linkage] (name in VST)
3323 // v1 ALIAS: [alias type, addrspace, aliasee val#, linkage, visibility,
3324 // dllstorageclass, threadlocal, unnamed_addr,
3325 // preemption specifier] (name in VST)
3326 // v1 IFUNC: [alias type, addrspace, aliasee val#, linkage,
3327 // visibility, dllstorageclass, threadlocal, unnamed_addr,
3328 // preemption specifier] (name in VST)
3329 // v2: [strtab_offset, strtab_size, v1]
3330 StringRef Name;
3331 std::tie(Name, Record) = readNameFromStrtab(Record);
3332
3333 bool NewRecord = BitCode != bitc::MODULE_CODE_ALIAS_OLD;
3334 if (Record.size() < (3 + (unsigned)NewRecord))
3335 return error("Invalid record");
3336 unsigned OpNum = 0;
3337 Type *FullTy = getFullyStructuredTypeByID(Record[OpNum++]);
3338 Type *Ty = flattenPointerTypes(FullTy);
3339 if (!Ty)
3340 return error("Invalid record");
3341
3342 unsigned AddrSpace;
3343 if (!NewRecord) {
3344 auto *PTy = dyn_cast<PointerType>(Ty);
3345 if (!PTy)
3346 return error("Invalid type for value");
3347 std::tie(FullTy, Ty) = getPointerElementTypes(FullTy);
3348 AddrSpace = PTy->getAddressSpace();
3349 } else {
3350 AddrSpace = Record[OpNum++];
3351 }
3352
3353 auto Val = Record[OpNum++];
3354 auto Linkage = Record[OpNum++];
3355 GlobalIndirectSymbol *NewGA;
3356 if (BitCode == bitc::MODULE_CODE_ALIAS ||
3357 BitCode == bitc::MODULE_CODE_ALIAS_OLD)
3358 NewGA = GlobalAlias::create(Ty, AddrSpace, getDecodedLinkage(Linkage), Name,
3359 TheModule);
3360 else
3361 NewGA = GlobalIFunc::create(Ty, AddrSpace, getDecodedLinkage(Linkage), Name,
3362 nullptr, TheModule);
3363
3364 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-10~++20200112100611+7fa5290d5bd/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 3365, __PRETTY_FUNCTION__))
3365 "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-10~++20200112100611+7fa5290d5bd/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 3365, __PRETTY_FUNCTION__))
;
3366 // Old bitcode files didn't have visibility field.
3367 // Local linkage must have default visibility.
3368 if (OpNum != Record.size()) {
3369 auto VisInd = OpNum++;
3370 if (!NewGA->hasLocalLinkage())
3371 // FIXME: Change to an error if non-default in 4.0.
3372 NewGA->setVisibility(getDecodedVisibility(Record[VisInd]));
3373 }
3374 if (BitCode == bitc::MODULE_CODE_ALIAS ||
3375 BitCode == bitc::MODULE_CODE_ALIAS_OLD) {
3376 if (OpNum != Record.size())
3377 NewGA->setDLLStorageClass(getDecodedDLLStorageClass(Record[OpNum++]));
3378 else
3379 upgradeDLLImportExportLinkage(NewGA, Linkage);
3380 if (OpNum != Record.size())
3381 NewGA->setThreadLocalMode(getDecodedThreadLocalMode(Record[OpNum++]));
3382 if (OpNum != Record.size())
3383 NewGA->setUnnamedAddr(getDecodedUnnamedAddrType(Record[OpNum++]));
3384 }
3385 if (OpNum != Record.size())
3386 NewGA->setDSOLocal(getDecodedDSOLocal(Record[OpNum++]));
3387 inferDSOLocal(NewGA);
3388
3389 // Check whether we have enough values to read a partition name.
3390 if (OpNum + 1 < Record.size()) {
3391 NewGA->setPartition(
3392 StringRef(Strtab.data() + Record[OpNum], Record[OpNum + 1]));
3393 OpNum += 2;
3394 }
3395
3396 FullTy = PointerType::get(FullTy, AddrSpace);
3397 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-10~++20200112100611+7fa5290d5bd/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 3398, __PRETTY_FUNCTION__))
3398 "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-10~++20200112100611+7fa5290d5bd/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 3398, __PRETTY_FUNCTION__))
;
3399 ValueList.push_back(NewGA, FullTy);
3400 IndirectSymbolInits.push_back(std::make_pair(NewGA, Val));
3401 return Error::success();
3402}
3403
3404Error BitcodeReader::parseModule(uint64_t ResumeBit,
3405 bool ShouldLazyLoadMetadata) {
3406 if (ResumeBit) {
3407 if (Error JumpFailed = Stream.JumpToBit(ResumeBit))
3408 return JumpFailed;
3409 } else if (Error Err = Stream.EnterSubBlock(bitc::MODULE_BLOCK_ID))
3410 return Err;
3411
3412 SmallVector<uint64_t, 64> Record;
3413
3414 // Read all the records for this module.
3415 while (true) {
3416 Expected<llvm::BitstreamEntry> MaybeEntry = Stream.advance();
3417 if (!MaybeEntry)
3418 return MaybeEntry.takeError();
3419 llvm::BitstreamEntry Entry = MaybeEntry.get();
3420
3421 switch (Entry.Kind) {
3422 case BitstreamEntry::Error:
3423 return error("Malformed block");
3424 case BitstreamEntry::EndBlock:
3425 return globalCleanup();
3426
3427 case BitstreamEntry::SubBlock:
3428 switch (Entry.ID) {
3429 default: // Skip unknown content.
3430 if (Error Err = Stream.SkipBlock())
3431 return Err;
3432 break;
3433 case bitc::BLOCKINFO_BLOCK_ID:
3434 if (readBlockInfo())
3435 return error("Malformed block");
3436 break;
3437 case bitc::PARAMATTR_BLOCK_ID:
3438 if (Error Err = parseAttributeBlock())
3439 return Err;
3440 break;
3441 case bitc::PARAMATTR_GROUP_BLOCK_ID:
3442 if (Error Err = parseAttributeGroupBlock())
3443 return Err;
3444 break;
3445 case bitc::TYPE_BLOCK_ID_NEW:
3446 if (Error Err = parseTypeTable())
3447 return Err;
3448 break;
3449 case bitc::VALUE_SYMTAB_BLOCK_ID:
3450 if (!SeenValueSymbolTable) {
3451 // Either this is an old form VST without function index and an
3452 // associated VST forward declaration record (which would have caused
3453 // the VST to be jumped to and parsed before it was encountered
3454 // normally in the stream), or there were no function blocks to
3455 // trigger an earlier parsing of the VST.
3456 assert(VSTOffset == 0 || FunctionsWithBodies.empty())((VSTOffset == 0 || FunctionsWithBodies.empty()) ? static_cast
<void> (0) : __assert_fail ("VSTOffset == 0 || FunctionsWithBodies.empty()"
, "/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 3456, __PRETTY_FUNCTION__))
;
3457 if (Error Err = parseValueSymbolTable())
3458 return Err;
3459 SeenValueSymbolTable = true;
3460 } else {
3461 // We must have had a VST forward declaration record, which caused
3462 // the parser to jump to and parse the VST earlier.
3463 assert(VSTOffset > 0)((VSTOffset > 0) ? static_cast<void> (0) : __assert_fail
("VSTOffset > 0", "/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 3463, __PRETTY_FUNCTION__))
;
3464 if (Error Err = Stream.SkipBlock())
3465 return Err;
3466 }
3467 break;
3468 case bitc::CONSTANTS_BLOCK_ID:
3469 if (Error Err = parseConstants())
3470 return Err;
3471 if (Error Err = resolveGlobalAndIndirectSymbolInits())
3472 return Err;
3473 break;
3474 case bitc::METADATA_BLOCK_ID:
3475 if (ShouldLazyLoadMetadata) {
3476 if (Error Err = rememberAndSkipMetadata())
3477 return Err;
3478 break;
3479 }
3480 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-10~++20200112100611+7fa5290d5bd/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 3480, __PRETTY_FUNCTION__))
;
3481 if (Error Err = MDLoader->parseModuleMetadata())
3482 return Err;
3483 break;
3484 case bitc::METADATA_KIND_BLOCK_ID:
3485 if (Error Err = MDLoader->parseMetadataKinds())
3486 return Err;
3487 break;
3488 case bitc::FUNCTION_BLOCK_ID:
3489 // If this is the first function body we've seen, reverse the
3490 // FunctionsWithBodies list.
3491 if (!SeenFirstFunctionBody) {
3492 std::reverse(FunctionsWithBodies.begin(), FunctionsWithBodies.end());
3493 if (Error Err = globalCleanup())
3494 return Err;
3495 SeenFirstFunctionBody = true;
3496 }
3497
3498 if (VSTOffset > 0) {
3499 // If we have a VST forward declaration record, make sure we
3500 // parse the VST now if we haven't already. It is needed to
3501 // set up the DeferredFunctionInfo vector for lazy reading.
3502 if (!SeenValueSymbolTable) {
3503 if (Error Err = BitcodeReader::parseValueSymbolTable(VSTOffset))
3504 return Err;
3505 SeenValueSymbolTable = true;
3506 // Fall through so that we record the NextUnreadBit below.
3507 // This is necessary in case we have an anonymous function that
3508 // is later materialized. Since it will not have a VST entry we
3509 // need to fall back to the lazy parse to find its offset.
3510 } else {
3511 // If we have a VST forward declaration record, but have already
3512 // parsed the VST (just above, when the first function body was
3513 // encountered here), then we are resuming the parse after
3514 // materializing functions. The ResumeBit points to the
3515 // start of the last function block recorded in the
3516 // DeferredFunctionInfo map. Skip it.
3517 if (Error Err = Stream.SkipBlock())
3518 return Err;
3519 continue;
3520 }
3521 }
3522
3523 // Support older bitcode files that did not have the function
3524 // index in the VST, nor a VST forward declaration record, as
3525 // well as anonymous functions that do not have VST entries.
3526 // Build the DeferredFunctionInfo vector on the fly.
3527 if (Error Err = rememberAndSkipFunctionBody())
3528 return Err;
3529
3530 // Suspend parsing when we reach the function bodies. Subsequent
3531 // materialization calls will resume it when necessary. If the bitcode
3532 // file is old, the symbol table will be at the end instead and will not
3533 // have been seen yet. In this case, just finish the parse now.
3534 if (SeenValueSymbolTable) {
3535 NextUnreadBit = Stream.GetCurrentBitNo();
3536 // After the VST has been parsed, we need to make sure intrinsic name
3537 // are auto-upgraded.
3538 return globalCleanup();
3539 }
3540 break;
3541 case bitc::USELIST_BLOCK_ID:
3542 if (Error Err = parseUseLists())
3543 return Err;
3544 break;
3545 case bitc::OPERAND_BUNDLE_TAGS_BLOCK_ID:
3546 if (Error Err = parseOperandBundleTags())
3547 return Err;
3548 break;
3549 case bitc::SYNC_SCOPE_NAMES_BLOCK_ID:
3550 if (Error Err = parseSyncScopeNames())
3551 return Err;
3552 break;
3553 }
3554 continue;
3555
3556 case BitstreamEntry::Record:
3557 // The interesting case.
3558 break;
3559 }
3560
3561 // Read a record.
3562 Expected<unsigned> MaybeBitCode = Stream.readRecord(Entry.ID, Record);
3563 if (!MaybeBitCode)
3564 return MaybeBitCode.takeError();
3565 switch (unsigned BitCode = MaybeBitCode.get()) {
3566 default: break; // Default behavior, ignore unknown content.
3567 case bitc::MODULE_CODE_VERSION: {
3568 Expected<unsigned> VersionOrErr = parseVersionRecord(Record);
3569 if (!VersionOrErr)
3570 return VersionOrErr.takeError();
3571 UseRelativeIDs = *VersionOrErr >= 1;
3572 break;
3573 }
3574 case bitc::MODULE_CODE_TRIPLE: { // TRIPLE: [strchr x N]
3575 std::string S;
3576 if (convertToString(Record, 0, S))
3577 return error("Invalid record");
3578 TheModule->setTargetTriple(S);
3579 break;
3580 }
3581 case bitc::MODULE_CODE_DATALAYOUT: { // DATALAYOUT: [strchr x N]
3582 std::string S;
3583 if (convertToString(Record, 0, S))
3584 return error("Invalid record");
3585 TheModule->setDataLayout(S);
3586 break;
3587 }
3588 case bitc::MODULE_CODE_ASM: { // ASM: [strchr x N]
3589 std::string S;
3590 if (convertToString(Record, 0, S))
3591 return error("Invalid record");
3592 TheModule->setModuleInlineAsm(S);
3593 break;
3594 }
3595 case bitc::MODULE_CODE_DEPLIB: { // DEPLIB: [strchr x N]
3596 // FIXME: Remove in 4.0.
3597 std::string S;
3598 if (convertToString(Record, 0, S))
3599 return error("Invalid record");
3600 // Ignore value.
3601 break;
3602 }
3603 case bitc::MODULE_CODE_SECTIONNAME: { // SECTIONNAME: [strchr x N]
3604 std::string S;
3605 if (convertToString(Record, 0, S))
3606 return error("Invalid record");
3607 SectionTable.push_back(S);
3608 break;
3609 }
3610 case bitc::MODULE_CODE_GCNAME: { // SECTIONNAME: [strchr x N]
3611 std::string S;
3612 if (convertToString(Record, 0, S))
3613 return error("Invalid record");
3614 GCTable.push_back(S);
3615 break;
3616 }
3617 case bitc::MODULE_CODE_COMDAT:
3618 if (Error Err = parseComdatRecord(Record))
3619 return Err;
3620 break;
3621 case bitc::MODULE_CODE_GLOBALVAR:
3622 if (Error Err = parseGlobalVarRecord(Record))
3623 return Err;
3624 break;
3625 case bitc::MODULE_CODE_FUNCTION:
3626 if (Error Err = parseFunctionRecord(Record))
3627 return Err;
3628 break;
3629 case bitc::MODULE_CODE_IFUNC:
3630 case bitc::MODULE_CODE_ALIAS:
3631 case bitc::MODULE_CODE_ALIAS_OLD:
3632 if (Error Err = parseGlobalIndirectSymbolRecord(BitCode, Record))
3633 return Err;
3634 break;
3635 /// MODULE_CODE_VSTOFFSET: [offset]
3636 case bitc::MODULE_CODE_VSTOFFSET:
3637 if (Record.size() < 1)
3638 return error("Invalid record");
3639 // Note that we subtract 1 here because the offset is relative to one word
3640 // before the start of the identification or module block, which was
3641 // historically always the start of the regular bitcode header.
3642 VSTOffset = Record[0] - 1;
3643 break;
3644 /// MODULE_CODE_SOURCE_FILENAME: [namechar x N]
3645 case bitc::MODULE_CODE_SOURCE_FILENAME:
3646 SmallString<128> ValueName;
3647 if (convertToString(Record, 0, ValueName))
3648 return error("Invalid record");
3649 TheModule->setSourceFileName(ValueName);
3650 break;
3651 }
3652 Record.clear();
3653
3654 // Upgrade data layout string.
3655 std::string DL = llvm::UpgradeDataLayoutString(
3656 TheModule->getDataLayoutStr(), TheModule->getTargetTriple());
3657 TheModule->setDataLayout(DL);
3658 }
3659}
3660
3661Error BitcodeReader::parseBitcodeInto(Module *M, bool ShouldLazyLoadMetadata,
3662 bool IsImporting) {
3663 TheModule = M;
3664 MDLoader = MetadataLoader(Stream, *M, ValueList, IsImporting,
3665 [&](unsigned ID) { return getTypeByID(ID); });
3666 return parseModule(0, ShouldLazyLoadMetadata);
3667}
3668
3669Error BitcodeReader::typeCheckLoadStoreInst(Type *ValType, Type *PtrType) {
3670 if (!isa<PointerType>(PtrType))
3671 return error("Load/Store operand is not a pointer type");
3672 Type *ElemType = cast<PointerType>(PtrType)->getElementType();
3673
3674 if (ValType && ValType != ElemType)
3675 return error("Explicit load/store type does not match pointee "
3676 "type of pointer operand");
3677 if (!PointerType::isLoadableOrStorableType(ElemType))
3678 return error("Cannot load/store from pointer");
3679 return Error::success();
3680}
3681
3682void BitcodeReader::propagateByValTypes(CallBase *CB,
3683 ArrayRef<Type *> ArgsFullTys) {
3684 for (unsigned i = 0; i != CB->arg_size(); ++i) {
3685 if (!CB->paramHasAttr(i, Attribute::ByVal))
3686 continue;
3687
3688 CB->removeParamAttr(i, Attribute::ByVal);
3689 CB->addParamAttr(
3690 i, Attribute::getWithByValType(
3691 Context, getPointerElementFlatType(ArgsFullTys[i])));
3692 }
3693}
3694
3695/// Lazily parse the specified function body block.
3696Error BitcodeReader::parseFunctionBody(Function *F) {
3697 if (Error Err = Stream.EnterSubBlock(bitc::FUNCTION_BLOCK_ID))
1
Assuming the condition is false
2
Taking false branch
3698 return Err;
3699
3700 // Unexpected unresolved metadata when parsing function.
3701 if (MDLoader->hasFwdRefs())
3
Assuming the condition is false
4
Taking false branch
3702 return error("Invalid function metadata: incoming forward references");
3703
3704 InstructionList.clear();
3705 unsigned ModuleValueListSize = ValueList.size();
3706 unsigned ModuleMDLoaderSize = MDLoader->size();
3707
3708 // Add all the function arguments to the value table.
3709 unsigned ArgNo = 0;
3710 FunctionType *FullFTy = FunctionTypes[F];
3711 for (Argument &I : F->args()) {
5
Assuming '__begin1' is equal to '__end1'
3712 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-10~++20200112100611+7fa5290d5bd/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 3713, __PRETTY_FUNCTION__))
3713 "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-10~++20200112100611+7fa5290d5bd/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 3713, __PRETTY_FUNCTION__))
;
3714 ValueList.push_back(&I, FullFTy->getParamType(ArgNo++));
3715 }
3716 unsigned NextValueNo = ValueList.size();
3717 BasicBlock *CurBB = nullptr;
6
'CurBB' initialized to a null pointer value
3718 unsigned CurBBNo = 0;
3719
3720 DebugLoc LastLoc;
3721 auto getLastInstruction = [&]() -> Instruction * {
3722 if (CurBB && !CurBB->empty())
3723 return &CurBB->back();
3724 else if (CurBBNo && FunctionBBs[CurBBNo - 1] &&
3725 !FunctionBBs[CurBBNo - 1]->empty())
3726 return &FunctionBBs[CurBBNo - 1]->back();
3727 return nullptr;
3728 };
3729
3730 std::vector<OperandBundleDef> OperandBundles;
3731
3732 // Read all the records.
3733 SmallVector<uint64_t, 64> Record;
3734
3735 while (true) {
7
Loop condition is true. Entering loop body
3736 Expected<llvm::BitstreamEntry> MaybeEntry = Stream.advance();
3737 if (!MaybeEntry)
8
Calling 'Expected::operator bool'
11
Returning from 'Expected::operator bool'
12
Taking false branch
3738 return MaybeEntry.takeError();
3739 llvm::BitstreamEntry Entry = MaybeEntry.get();
3740
3741 switch (Entry.Kind) {
13
Control jumps to 'case Record:' at line 3779
3742 case BitstreamEntry::Error:
3743 return error("Malformed block");
3744 case BitstreamEntry::EndBlock:
3745 goto OutOfRecordLoop;
3746
3747 case BitstreamEntry::SubBlock:
3748 switch (Entry.ID) {
3749 default: // Skip unknown content.
3750 if (Error Err = Stream.SkipBlock())
3751 return Err;
3752 break;
3753 case bitc::CONSTANTS_BLOCK_ID:
3754 if (Error Err = parseConstants())
3755 return Err;
3756 NextValueNo = ValueList.size();
3757 break;
3758 case bitc::VALUE_SYMTAB_BLOCK_ID:
3759 if (Error Err = parseValueSymbolTable())
3760 return Err;
3761 break;
3762 case bitc::METADATA_ATTACHMENT_ID:
3763 if (Error Err = MDLoader->parseMetadataAttachment(*F, InstructionList))
3764 return Err;
3765 break;
3766 case bitc::METADATA_BLOCK_ID:
3767 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-10~++20200112100611+7fa5290d5bd/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 3768, __PRETTY_FUNCTION__))
3768 "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-10~++20200112100611+7fa5290d5bd/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 3768, __PRETTY_FUNCTION__))
;
3769 if (Error Err = MDLoader->parseFunctionMetadata())
3770 return Err;
3771 break;
3772 case bitc::USELIST_BLOCK_ID:
3773 if (Error Err = parseUseLists())
3774 return Err;
3775 break;
3776 }
3777 continue;
3778
3779 case BitstreamEntry::Record:
3780 // The interesting case.
3781 break;
14
Execution continues on line 3785
3782 }
3783
3784 // Read a record.
3785 Record.clear();
3786 Instruction *I = nullptr;
3787 Type *FullTy = nullptr;
3788 Expected<unsigned> MaybeBitCode = Stream.readRecord(Entry.ID, Record);
3789 if (!MaybeBitCode)
15
Calling 'Expected::operator bool'
18
Returning from 'Expected::operator bool'
19
Taking false branch
3790 return MaybeBitCode.takeError();
3791 switch (unsigned BitCode = MaybeBitCode.get()) {
20
Control jumps to 'case FUNC_CODE_INST_CMPXCHG_OLD:' at line 4893
3792 default: // Default behavior: reject
3793 return error("Invalid value");
3794 case bitc::FUNC_CODE_DECLAREBLOCKS: { // DECLAREBLOCKS: [nblocks]
3795 if (Record.size() < 1 || Record[0] == 0)
3796 return error("Invalid record");
3797 // Create all the basic blocks for the function.
3798 FunctionBBs.resize(Record[0]);
3799
3800 // See if anything took the address of blocks in this function.
3801 auto BBFRI = BasicBlockFwdRefs.find(F);
3802 if (BBFRI == BasicBlockFwdRefs.end()) {
3803 for (unsigned i = 0, e = FunctionBBs.size(); i != e; ++i)
3804 FunctionBBs[i] = BasicBlock::Create(Context, "", F);
3805 } else {
3806 auto &BBRefs = BBFRI->second;
3807 // Check for invalid basic block references.
3808 if (BBRefs.size() > FunctionBBs.size())
3809 return error("Invalid ID");
3810 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-10~++20200112100611+7fa5290d5bd/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 3810, __PRETTY_FUNCTION__))
;
3811 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-10~++20200112100611+7fa5290d5bd/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 3811, __PRETTY_FUNCTION__))
;
3812 for (unsigned I = 0, E = FunctionBBs.size(), RE = BBRefs.size(); I != E;
3813 ++I)
3814 if (I < RE && BBRefs[I]) {
3815 BBRefs[I]->insertInto(F);
3816 FunctionBBs[I] = BBRefs[I];
3817 } else {
3818 FunctionBBs[I] = BasicBlock::Create(Context, "", F);
3819 }
3820
3821 // Erase from the table.
3822 BasicBlockFwdRefs.erase(BBFRI);
3823 }
3824
3825 CurBB = FunctionBBs[0];
3826 continue;
3827 }
3828
3829 case bitc::FUNC_CODE_DEBUG_LOC_AGAIN: // DEBUG_LOC_AGAIN
3830 // This record indicates that the last instruction is at the same
3831 // location as the previous instruction with a location.
3832 I = getLastInstruction();
3833
3834 if (!I)
3835 return error("Invalid record");
3836 I->setDebugLoc(LastLoc);
3837 I = nullptr;
3838 continue;
3839
3840 case bitc::FUNC_CODE_DEBUG_LOC: { // DEBUG_LOC: [line, col, scope, ia]
3841 I = getLastInstruction();
3842 if (!I || Record.size() < 4)
3843 return error("Invalid record");
3844
3845 unsigned Line = Record[0], Col = Record[1];
3846 unsigned ScopeID = Record[2], IAID = Record[3];
3847 bool isImplicitCode = Record.size() == 5 && Record[4];
3848
3849 MDNode *Scope = nullptr, *IA = nullptr;
3850 if (ScopeID) {
3851 Scope = dyn_cast_or_null<MDNode>(
3852 MDLoader->getMetadataFwdRefOrLoad(ScopeID - 1));
3853 if (!Scope)
3854 return error("Invalid record");
3855 }
3856 if (IAID) {
3857 IA = dyn_cast_or_null<MDNode>(
3858 MDLoader->getMetadataFwdRefOrLoad(IAID - 1));
3859 if (!IA)
3860 return error("Invalid record");
3861 }
3862 LastLoc = DebugLoc::get(Line, Col, Scope, IA, isImplicitCode);
3863 I->setDebugLoc(LastLoc);
3864 I = nullptr;
3865 continue;
3866 }
3867 case bitc::FUNC_CODE_INST_UNOP: { // UNOP: [opval, ty, opcode]
3868 unsigned OpNum = 0;
3869 Value *LHS;
3870 if (getValueTypePair(Record, OpNum, NextValueNo, LHS) ||
3871 OpNum+1 > Record.size())
3872 return error("Invalid record");
3873
3874 int Opc = getDecodedUnaryOpcode(Record[OpNum++], LHS->getType());
3875 if (Opc == -1)
3876 return error("Invalid record");
3877 I = UnaryOperator::Create((Instruction::UnaryOps)Opc, LHS);
3878 InstructionList.push_back(I);
3879 if (OpNum < Record.size()) {
3880 if (isa<FPMathOperator>(I)) {
3881 FastMathFlags FMF = getDecodedFastMathFlags(Record[OpNum]);
3882 if (FMF.any())
3883 I->setFastMathFlags(FMF);
3884 }
3885 }
3886 break;
3887 }
3888 case bitc::FUNC_CODE_INST_BINOP: { // BINOP: [opval, ty, opval, opcode]
3889 unsigned OpNum = 0;
3890 Value *LHS, *RHS;
3891 if (getValueTypePair(Record, OpNum, NextValueNo, LHS) ||
3892 popValue(Record, OpNum, NextValueNo, LHS->getType(), RHS) ||
3893 OpNum+1 > Record.size())
3894 return error("Invalid record");
3895
3896 int Opc = getDecodedBinaryOpcode(Record[OpNum++], LHS->getType());
3897 if (Opc == -1)
3898 return error("Invalid record");
3899 I = BinaryOperator::Create((Instruction::BinaryOps)Opc, LHS, RHS);
3900 InstructionList.push_back(I);
3901 if (OpNum < Record.size()) {
3902 if (Opc == Instruction::Add ||
3903 Opc == Instruction::Sub ||
3904 Opc == Instruction::Mul ||
3905 Opc == Instruction::Shl) {
3906 if (Record[OpNum] & (1 << bitc::OBO_NO_SIGNED_WRAP))
3907 cast<BinaryOperator>(I)->setHasNoSignedWrap(true);
3908 if (Record[OpNum] & (1 << bitc::OBO_NO_UNSIGNED_WRAP))
3909 cast<BinaryOperator>(I)->setHasNoUnsignedWrap(true);
3910 } else if (Opc == Instruction::SDiv ||
3911 Opc == Instruction::UDiv ||
3912 Opc == Instruction::LShr ||
3913 Opc == Instruction::AShr) {
3914 if (Record[OpNum] & (1 << bitc::PEO_EXACT))
3915 cast<BinaryOperator>(I)->setIsExact(true);
3916 } else if (isa<FPMathOperator>(I)) {
3917 FastMathFlags FMF = getDecodedFastMathFlags(Record[OpNum]);
3918 if (FMF.any())
3919 I->setFastMathFlags(FMF);
3920 }
3921
3922 }
3923 break;
3924 }
3925 case bitc::FUNC_CODE_INST_CAST: { // CAST: [opval, opty, destty, castopc]
3926 unsigned OpNum = 0;
3927 Value *Op;
3928 if (getValueTypePair(Record, OpNum, NextValueNo, Op) ||
3929 OpNum+2 != Record.size())
3930 return error("Invalid record");
3931
3932 FullTy = getFullyStructuredTypeByID(Record[OpNum]);
3933 Type *ResTy = flattenPointerTypes(FullTy);
3934 int Opc = getDecodedCastOpcode(Record[OpNum + 1]);
3935 if (Opc == -1 || !ResTy)
3936 return error("Invalid record");
3937 Instruction *Temp = nullptr;
3938 if ((I = UpgradeBitCastInst(Opc, Op, ResTy, Temp))) {
3939 if (Temp) {
3940 InstructionList.push_back(Temp);
3941 assert(CurBB && "No current BB?")((CurBB && "No current BB?") ? static_cast<void>
(0) : __assert_fail ("CurBB && \"No current BB?\"", "/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 3941, __PRETTY_FUNCTION__))
;
3942 CurBB->getInstList().push_back(Temp);
3943 }
3944 } else {
3945 auto CastOp = (Instruction::CastOps)Opc;
3946 if (!CastInst::castIsValid(CastOp, Op, ResTy))
3947 return error("Invalid cast");
3948 I = CastInst::Create(CastOp, Op, ResTy);
3949 }
3950 InstructionList.push_back(I);
3951 break;
3952 }
3953 case bitc::FUNC_CODE_INST_INBOUNDS_GEP_OLD:
3954 case bitc::FUNC_CODE_INST_GEP_OLD:
3955 case bitc::FUNC_CODE_INST_GEP: { // GEP: type, [n x operands]
3956 unsigned OpNum = 0;
3957
3958 Type *Ty;
3959 bool InBounds;
3960
3961 if (BitCode == bitc::FUNC_CODE_INST_GEP) {
3962 InBounds = Record[OpNum++];
3963 FullTy = getFullyStructuredTypeByID(Record[OpNum++]);
3964 Ty = flattenPointerTypes(FullTy);
3965 } else {
3966 InBounds = BitCode == bitc::FUNC_CODE_INST_INBOUNDS_GEP_OLD;
3967 Ty = nullptr;
3968 }
3969
3970 Value *BasePtr;
3971 Type *FullBaseTy = nullptr;
3972 if (getValueTypePair(Record, OpNum, NextValueNo, BasePtr, &FullBaseTy))
3973 return error("Invalid record");
3974
3975 if (!Ty) {
3976 std::tie(FullTy, Ty) =
3977 getPointerElementTypes(FullBaseTy->getScalarType());
3978 } else if (Ty != getPointerElementFlatType(FullBaseTy->getScalarType()))
3979 return error(
3980 "Explicit gep type does not match pointee type of pointer operand");
3981
3982 SmallVector<Value*, 16> GEPIdx;
3983 while (OpNum != Record.size()) {
3984 Value *Op;
3985 if (getValueTypePair(Record, OpNum, NextValueNo, Op))
3986 return error("Invalid record");
3987 GEPIdx.push_back(Op);
3988 }
3989
3990 I = GetElementPtrInst::Create(Ty, BasePtr, GEPIdx);
3991 FullTy = GetElementPtrInst::getGEPReturnType(FullTy, I, GEPIdx);
3992
3993 InstructionList.push_back(I);
3994 if (InBounds)
3995 cast<GetElementPtrInst>(I)->setIsInBounds(true);
3996 break;
3997 }
3998
3999 case bitc::FUNC_CODE_INST_EXTRACTVAL: {
4000 // EXTRACTVAL: [opty, opval, n x indices]
4001 unsigned OpNum = 0;
4002 Value *Agg;
4003 if (getValueTypePair(Record, OpNum, NextValueNo, Agg, &FullTy))
4004 return error("Invalid record");
4005
4006 unsigned RecSize = Record.size();
4007 if (OpNum == RecSize)
4008 return error("EXTRACTVAL: Invalid instruction with 0 indices");
4009
4010 SmallVector<unsigned, 4> EXTRACTVALIdx;
4011 for (; OpNum != RecSize; ++OpNum) {
4012 bool IsArray = FullTy->isArrayTy();
4013 bool IsStruct = FullTy->isStructTy();
4014 uint64_t Index = Record[OpNum];
4015
4016 if (!IsStruct && !IsArray)
4017 return error("EXTRACTVAL: Invalid type");
4018 if ((unsigned)Index != Index)
4019 return error("Invalid value");
4020 if (IsStruct && Index >= FullTy->getStructNumElements())
4021 return error("EXTRACTVAL: Invalid struct index");
4022 if (IsArray && Index >= FullTy->getArrayNumElements())
4023 return error("EXTRACTVAL: Invalid array index");
4024 EXTRACTVALIdx.push_back((unsigned)Index);
4025
4026 if (IsStruct)
4027 FullTy = FullTy->getStructElementType(Index);
4028 else
4029 FullTy = FullTy->getArrayElementType();
4030 }
4031
4032 I = ExtractValueInst::Create(Agg, EXTRACTVALIdx);
4033 InstructionList.push_back(I);
4034 break;
4035 }
4036
4037 case bitc::FUNC_CODE_INST_INSERTVAL: {
4038 // INSERTVAL: [opty, opval, opty, opval, n x indices]
4039 unsigned OpNum = 0;
4040 Value *Agg;
4041 if (getValueTypePair(Record, OpNum, NextValueNo, Agg, &FullTy))
4042 return error("Invalid record");
4043 Value *Val;
4044 if (getValueTypePair(Record, OpNum, NextValueNo, Val))
4045 return error("Invalid record");
4046
4047 unsigned RecSize = Record.size();
4048 if (OpNum == RecSize)
4049 return error("INSERTVAL: Invalid instruction with 0 indices");
4050
4051 SmallVector<unsigned, 4> INSERTVALIdx;
4052 Type *CurTy = Agg->getType();
4053 for (; OpNum != RecSize; ++OpNum) {
4054 bool IsArray = CurTy->isArrayTy();
4055 bool IsStruct = CurTy->isStructTy();
4056 uint64_t Index = Record[OpNum];
4057
4058 if (!IsStruct && !IsArray)
4059 return error("INSERTVAL: Invalid type");
4060 if ((unsigned)Index != Index)
4061 return error("Invalid value");
4062 if (IsStruct && Index >= CurTy->getStructNumElements())
4063 return error("INSERTVAL: Invalid struct index");
4064 if (IsArray && Index >= CurTy->getArrayNumElements())
4065 return error("INSERTVAL: Invalid array index");
4066
4067 INSERTVALIdx.push_back((unsigned)Index);
4068 if (IsStruct)
4069 CurTy = CurTy->getStructElementType(Index);
4070 else
4071 CurTy = CurTy->getArrayElementType();
4072 }
4073
4074 if (CurTy != Val->getType())
4075 return error("Inserted value type doesn't match aggregate type");
4076
4077 I = InsertValueInst::Create(Agg, Val, INSERTVALIdx);
4078 InstructionList.push_back(I);
4079 break;
4080 }
4081
4082 case bitc::FUNC_CODE_INST_SELECT: { // SELECT: [opval, ty, opval, opval]
4083 // obsolete form of select
4084 // handles select i1 ... in old bitcode
4085 unsigned OpNum = 0;
4086 Value *TrueVal, *FalseVal, *Cond;
4087 if (getValueTypePair(Record, OpNum, NextValueNo, TrueVal, &FullTy) ||
4088 popValue(Record, OpNum, NextValueNo, TrueVal->getType(), FalseVal) ||
4089 popValue(Record, OpNum, NextValueNo, Type::getInt1Ty(Context), Cond))
4090 return error("Invalid record");
4091
4092 I = SelectInst::Create(Cond, TrueVal, FalseVal);
4093 InstructionList.push_back(I);
4094 break;
4095 }
4096
4097 case bitc::FUNC_CODE_INST_VSELECT: {// VSELECT: [ty,opval,opval,predty,pred]
4098 // new form of select
4099 // handles select i1 or select [N x i1]
4100 unsigned OpNum = 0;
4101 Value *TrueVal, *FalseVal, *Cond;
4102 if (getValueTypePair(Record, OpNum, NextValueNo, TrueVal, &FullTy) ||
4103 popValue(Record, OpNum, NextValueNo, TrueVal->getType(), FalseVal) ||
4104 getValueTypePair(Record, OpNum, NextValueNo, Cond))
4105 return error("Invalid record");
4106
4107 // select condition can be either i1 or [N x i1]
4108 if (VectorType* vector_type =
4109 dyn_cast<VectorType>(Cond->getType())) {
4110 // expect <n x i1>
4111 if (vector_type->getElementType() != Type::getInt1Ty(Context))
4112 return error("Invalid type for value");
4113 } else {
4114 // expect i1
4115 if (Cond->getType() != Type::getInt1Ty(Context))
4116 return error("Invalid type for value");
4117 }
4118
4119 I = SelectInst::Create(Cond, TrueVal, FalseVal);
4120 InstructionList.push_back(I);
4121 if (OpNum < Record.size() && isa<FPMathOperator>(I)) {
4122 FastMathFlags FMF = getDecodedFastMathFlags(Record[OpNum]);
4123 if (FMF.any())
4124 I->setFastMathFlags(FMF);
4125 }
4126 break;
4127 }
4128
4129 case bitc::FUNC_CODE_INST_EXTRACTELT: { // EXTRACTELT: [opty, opval, opval]
4130 unsigned OpNum = 0;
4131 Value *Vec, *Idx;
4132 if (getValueTypePair(Record, OpNum, NextValueNo, Vec, &FullTy) ||
4133 getValueTypePair(Record, OpNum, NextValueNo, Idx))
4134 return error("Invalid record");
4135 if (!Vec->getType()->isVectorTy())
4136 return error("Invalid type for value");
4137 I = ExtractElementInst::Create(Vec, Idx);
4138 FullTy = FullTy->getVectorElementType();
4139 InstructionList.push_back(I);
4140 break;
4141 }
4142
4143 case bitc::FUNC_CODE_INST_INSERTELT: { // INSERTELT: [ty, opval,opval,opval]
4144 unsigned OpNum = 0;
4145 Value *Vec, *Elt, *Idx;
4146 if (getValueTypePair(Record, OpNum, NextValueNo, Vec, &FullTy))
4147 return error("Invalid record");
4148 if (!Vec->getType()->isVectorTy())
4149 return error("Invalid type for value");
4150 if (popValue(Record, OpNum, NextValueNo,
4151 cast<VectorType>(Vec->getType())->getElementType(), Elt) ||
4152 getValueTypePair(Record, OpNum, NextValueNo, Idx))
4153 return error("Invalid record");
4154 I = InsertElementInst::Create(Vec, Elt, Idx);
4155 InstructionList.push_back(I);
4156 break;
4157 }
4158
4159 case bitc::FUNC_CODE_INST_SHUFFLEVEC: {// SHUFFLEVEC: [opval,ty,opval,opval]
4160 unsigned OpNum = 0;
4161 Value *Vec1, *Vec2, *Mask;
4162 if (getValueTypePair(Record, OpNum, NextValueNo, Vec1, &FullTy) ||
4163 popValue(Record, OpNum, NextValueNo, Vec1->getType(), Vec2))
4164 return error("Invalid record");
4165
4166 if (getValueTypePair(Record, OpNum, NextValueNo, Mask))
4167 return error("Invalid record");
4168 if (!Vec1->getType()->isVectorTy() || !Vec2->getType()->isVectorTy())
4169 return error("Invalid type for value");
4170 I = new ShuffleVectorInst(Vec1, Vec2, Mask);
4171 FullTy = VectorType::get(FullTy->getVectorElementType(),
4172 Mask->getType()->getVectorNumElements());
4173 InstructionList.push_back(I);
4174 break;
4175 }
4176
4177 case bitc::FUNC_CODE_INST_CMP: // CMP: [opty, opval, opval, pred]
4178 // Old form of ICmp/FCmp returning bool
4179 // Existed to differentiate between icmp/fcmp and vicmp/vfcmp which were
4180 // both legal on vectors but had different behaviour.
4181 case bitc::FUNC_CODE_INST_CMP2: { // CMP2: [opty, opval, opval, pred]
4182 // FCmp/ICmp returning bool or vector of bool
4183
4184 unsigned OpNum = 0;
4185 Value *LHS, *RHS;
4186 if (getValueTypePair(Record, OpNum, NextValueNo, LHS) ||
4187 popValue(Record, OpNum, NextValueNo, LHS->getType(), RHS))
4188 return error("Invalid record");
4189
4190 if (OpNum >= Record.size())
4191 return error(
4192 "Invalid record: operand number exceeded available operands");
4193
4194 unsigned PredVal = Record[OpNum];
4195 bool IsFP = LHS->getType()->isFPOrFPVectorTy();
4196 FastMathFlags FMF;
4197 if (IsFP && Record.size() > OpNum+1)
4198 FMF = getDecodedFastMathFlags(Record[++OpNum]);
4199
4200 if (OpNum+1 != Record.size())
4201 return error("Invalid record");
4202
4203 if (LHS->getType()->isFPOrFPVectorTy())
4204 I = new FCmpInst((FCmpInst::Predicate)PredVal, LHS, RHS);
4205 else
4206 I = new ICmpInst((ICmpInst::Predicate)PredVal, LHS, RHS);
4207
4208 if (FMF.any())
4209 I->setFastMathFlags(FMF);
4210 InstructionList.push_back(I);
4211 break;
4212 }
4213
4214 case bitc::FUNC_CODE_INST_RET: // RET: [opty,opval<optional>]
4215 {
4216 unsigned Size = Record.size();
4217 if (Size == 0) {
4218 I = ReturnInst::Create(Context);
4219 InstructionList.push_back(I);
4220 break;
4221 }
4222
4223 unsigned OpNum = 0;
4224 Value *Op = nullptr;
4225 if (getValueTypePair(Record, OpNum, NextValueNo, Op))
4226 return error("Invalid record");
4227 if (OpNum != Record.size())
4228 return error("Invalid record");
4229
4230 I = ReturnInst::Create(Context, Op);
4231 InstructionList.push_back(I);
4232 break;
4233 }
4234 case bitc::FUNC_CODE_INST_BR: { // BR: [bb#, bb#, opval] or [bb#]
4235 if (Record.size() != 1 && Record.size() != 3)
4236 return error("Invalid record");
4237 BasicBlock *TrueDest = getBasicBlock(Record[0]);
4238 if (!TrueDest)
4239 return error("Invalid record");
4240
4241 if (Record.size() == 1) {
4242 I = BranchInst::Create(TrueDest);
4243 InstructionList.push_back(I);
4244 }
4245 else {
4246 BasicBlock *FalseDest = getBasicBlock(Record[1]);
4247 Value *Cond = getValue(Record, 2, NextValueNo,
4248 Type::getInt1Ty(Context));
4249 if (!FalseDest || !Cond)
4250 return error("Invalid record");
4251 I = BranchInst::Create(TrueDest, FalseDest, Cond);
4252 InstructionList.push_back(I);
4253 }
4254 break;
4255 }
4256 case bitc::FUNC_CODE_INST_CLEANUPRET: { // CLEANUPRET: [val] or [val,bb#]
4257 if (Record.size() != 1 && Record.size() != 2)
4258 return error("Invalid record");
4259 unsigned Idx = 0;
4260 Value *CleanupPad =
4261 getValue(Record, Idx++, NextValueNo, Type::getTokenTy(Context));
4262 if (!CleanupPad)
4263 return error("Invalid record");
4264 BasicBlock *UnwindDest = nullptr;
4265 if (Record.size() == 2) {
4266 UnwindDest = getBasicBlock(Record[Idx++]);
4267 if (!UnwindDest)
4268 return error("Invalid record");
4269 }
4270
4271 I = CleanupReturnInst::Create(CleanupPad, UnwindDest);
4272 InstructionList.push_back(I);
4273 break;
4274 }
4275 case bitc::FUNC_CODE_INST_CATCHRET: { // CATCHRET: [val,bb#]
4276 if (Record.size() != 2)
4277 return error("Invalid record");
4278 unsigned Idx = 0;
4279 Value *CatchPad =
4280 getValue(Record, Idx++, NextValueNo, Type::getTokenTy(Context));
4281 if (!CatchPad)
4282 return error("Invalid record");
4283 BasicBlock *BB = getBasicBlock(Record[Idx++]);
4284 if (!BB)
4285 return error("Invalid record");
4286
4287 I = CatchReturnInst::Create(CatchPad, BB);
4288 InstructionList.push_back(I);
4289 break;
4290 }
4291 case bitc::FUNC_CODE_INST_CATCHSWITCH: { // CATCHSWITCH: [tok,num,(bb)*,bb?]
4292 // We must have, at minimum, the outer scope and the number of arguments.
4293 if (Record.size() < 2)
4294 return error("Invalid record");
4295
4296 unsigned Idx = 0;
4297
4298 Value *ParentPad =
4299 getValue(Record, Idx++, NextValueNo, Type::getTokenTy(Context));
4300
4301 unsigned NumHandlers = Record[Idx++];
4302
4303 SmallVector<BasicBlock *, 2> Handlers;
4304 for (unsigned Op = 0; Op != NumHandlers; ++Op) {
4305 BasicBlock *BB = getBasicBlock(Record[Idx++]);
4306 if (!BB)
4307 return error("Invalid record");
4308 Handlers.push_back(BB);
4309 }
4310
4311 BasicBlock *UnwindDest = nullptr;
4312 if (Idx + 1 == Record.size()) {
4313 UnwindDest = getBasicBlock(Record[Idx++]);
4314 if (!UnwindDest)
4315 return error("Invalid record");
4316 }
4317
4318 if (Record.size() != Idx)
4319 return error("Invalid record");
4320
4321 auto *CatchSwitch =
4322 CatchSwitchInst::Create(ParentPad, UnwindDest, NumHandlers);
4323 for (BasicBlock *Handler : Handlers)
4324 CatchSwitch->addHandler(Handler);
4325 I = CatchSwitch;
4326 InstructionList.push_back(I);
4327 break;
4328 }
4329 case bitc::FUNC_CODE_INST_CATCHPAD:
4330 case bitc::FUNC_CODE_INST_CLEANUPPAD: { // [tok,num,(ty,val)*]
4331 // We must have, at minimum, the outer scope and the number of arguments.
4332 if (Record.size() < 2)
4333 return error("Invalid record");
4334
4335 unsigned Idx = 0;
4336
4337 Value *ParentPad =
4338 getValue(Record, Idx++, NextValueNo, Type::getTokenTy(Context));
4339
4340 unsigned NumArgOperands = Record[Idx++];
4341
4342 SmallVector<Value *, 2> Args;
4343 for (unsigned Op = 0; Op != NumArgOperands; ++Op) {
4344 Value *Val;
4345 if (getValueTypePair(Record, Idx, NextValueNo, Val))
4346 return error("Invalid record");
4347 Args.push_back(Val);
4348 }
4349
4350 if (Record.size() != Idx)
4351 return error("Invalid record");
4352
4353 if (BitCode == bitc::FUNC_CODE_INST_CLEANUPPAD)
4354 I = CleanupPadInst::Create(ParentPad, Args);
4355 else
4356 I = CatchPadInst::Create(ParentPad, Args);
4357 InstructionList.push_back(I);
4358 break;
4359 }
4360 case bitc::FUNC_CODE_INST_SWITCH: { // SWITCH: [opty, op0, op1, ...]
4361 // Check magic
4362 if ((Record[0] >> 16) == SWITCH_INST_MAGIC) {
4363 // "New" SwitchInst format with case ranges. The changes to write this
4364 // format were reverted but we still recognize bitcode that uses it.
4365 // Hopefully someday we will have support for case ranges and can use
4366 // this format again.
4367
4368 Type *OpTy = getTypeByID(Record[1]);
4369 unsigned ValueBitWidth = cast<IntegerType>(OpTy)->getBitWidth();
4370
4371 Value *Cond = getValue(Record, 2, NextValueNo, OpTy);
4372 BasicBlock *Default = getBasicBlock(Record[3]);
4373 if (!OpTy || !Cond || !Default)
4374 return error("Invalid record");
4375
4376 unsigned NumCases = Record[4];
4377
4378 SwitchInst *SI = SwitchInst::Create(Cond, Default, NumCases);
4379 InstructionList.push_back(SI);
4380
4381 unsigned CurIdx = 5;
4382 for (unsigned i = 0; i != NumCases; ++i) {
4383 SmallVector<ConstantInt*, 1> CaseVals;
4384 unsigned NumItems = Record[CurIdx++];
4385 for (unsigned ci = 0; ci != NumItems; ++ci) {
4386 bool isSingleNumber = Record[CurIdx++];
4387
4388 APInt Low;
4389 unsigned ActiveWords = 1;
4390 if (ValueBitWidth > 64)
4391 ActiveWords = Record[CurIdx++];
4392 Low = readWideAPInt(makeArrayRef(&Record[CurIdx], ActiveWords),
4393 ValueBitWidth);
4394 CurIdx += ActiveWords;
4395
4396 if (!isSingleNumber) {
4397 ActiveWords = 1;
4398 if (ValueBitWidth > 64)
4399 ActiveWords = Record[CurIdx++];
4400 APInt High = readWideAPInt(
4401 makeArrayRef(&Record[CurIdx], ActiveWords), ValueBitWidth);
4402 CurIdx += ActiveWords;
4403
4404 // FIXME: It is not clear whether values in the range should be
4405 // compared as signed or unsigned values. The partially
4406 // implemented changes that used this format in the past used
4407 // unsigned comparisons.
4408 for ( ; Low.ule(High); ++Low)
4409 CaseVals.push_back(ConstantInt::get(Context, Low));
4410 } else
4411 CaseVals.push_back(ConstantInt::get(Context, Low));
4412 }
4413 BasicBlock *DestBB = getBasicBlock(Record[CurIdx++]);
4414 for (SmallVector<ConstantInt*, 1>::iterator cvi = CaseVals.begin(),
4415 cve = CaseVals.end(); cvi != cve; ++cvi)
4416 SI->addCase(*cvi, DestBB);
4417 }
4418 I = SI;
4419 break;
4420 }
4421
4422 // Old SwitchInst format without case ranges.
4423
4424 if (Record.size() < 3 || (Record.size() & 1) == 0)
4425 return error("Invalid record");
4426 Type *OpTy = getTypeByID(Record[0]);
4427 Value *Cond = getValue(Record, 1, NextValueNo, OpTy);
4428 BasicBlock *Default = getBasicBlock(Record[2]);
4429 if (!OpTy || !Cond || !Default)
4430 return error("Invalid record");
4431 unsigned NumCases = (Record.size()-3)/2;
4432 SwitchInst *SI = SwitchInst::Create(Cond, Default, NumCases);
4433 InstructionList.push_back(SI);
4434 for (unsigned i = 0, e = NumCases; i != e; ++i) {
4435 ConstantInt *CaseVal =
4436 dyn_cast_or_null<ConstantInt>(getFnValueByID(Record[3+i*2], OpTy));
4437 BasicBlock *DestBB = getBasicBlock(Record[1+3+i*2]);
4438 if (!CaseVal || !DestBB) {
4439 delete SI;
4440 return error("Invalid record");
4441 }
4442 SI->addCase(CaseVal, DestBB);
4443 }
4444 I = SI;
4445 break;
4446 }
4447 case bitc::FUNC_CODE_INST_INDIRECTBR: { // INDIRECTBR: [opty, op0, op1, ...]
4448 if (Record.size() < 2)
4449 return error("Invalid record");
4450 Type *OpTy = getTypeByID(Record[0]);
4451 Value *Address = getValue(Record, 1, NextValueNo, OpTy);
4452 if (!OpTy || !Address)
4453 return error("Invalid record");
4454 unsigned NumDests = Record.size()-2;
4455 IndirectBrInst *IBI = IndirectBrInst::Create(Address, NumDests);
4456 InstructionList.push_back(IBI);
4457 for (unsigned i = 0, e = NumDests; i != e; ++i) {
4458 if (BasicBlock *DestBB = getBasicBlock(Record[2+i])) {
4459 IBI->addDestination(DestBB);
4460 } else {
4461 delete IBI;
4462 return error("Invalid record");
4463 }
4464 }
4465 I = IBI;
4466 break;
4467 }
4468
4469 case bitc::FUNC_CODE_INST_INVOKE: {
4470 // INVOKE: [attrs, cc, normBB, unwindBB, fnty, op0,op1,op2, ...]
4471 if (Record.size() < 4)
4472 return error("Invalid record");
4473 unsigned OpNum = 0;
4474 AttributeList PAL = getAttributes(Record[OpNum++]);
4475 unsigned CCInfo = Record[OpNum++];
4476 BasicBlock *NormalBB = getBasicBlock(Record[OpNum++]);
4477 BasicBlock *UnwindBB = getBasicBlock(Record[OpNum++]);
4478
4479 FunctionType *FTy = nullptr;
4480 FunctionType *FullFTy = nullptr;
4481 if ((CCInfo >> 13) & 1) {
4482 FullFTy =
4483 dyn_cast<FunctionType>(getFullyStructuredTypeByID(Record[OpNum++]));
4484 if (!FullFTy)
4485 return error("Explicit invoke type is not a function type");
4486 FTy = cast<FunctionType>(flattenPointerTypes(FullFTy));
4487 }
4488
4489 Value *Callee;
4490 if (getValueTypePair(Record, OpNum, NextValueNo, Callee, &FullTy))
4491 return error("Invalid record");
4492
4493 PointerType *CalleeTy = dyn_cast<PointerType>(Callee->getType());
4494 if (!CalleeTy)
4495 return error("Callee is not a pointer");
4496 if (!FTy) {
4497 FullFTy =
4498 dyn_cast<FunctionType>(cast<PointerType>(FullTy)->getElementType());
4499 if (!FullFTy)
4500 return error("Callee is not of pointer to function type");
4501 FTy = cast<FunctionType>(flattenPointerTypes(FullFTy));
4502 } else if (getPointerElementFlatType(FullTy) != FTy)
4503 return error("Explicit invoke type does not match pointee type of "
4504 "callee operand");
4505 if (Record.size() < FTy->getNumParams() + OpNum)
4506 return error("Insufficient operands to call");
4507
4508 SmallVector<Value*, 16> Ops;
4509 SmallVector<Type *, 16> ArgsFullTys;
4510 for (unsigned i = 0, e = FTy->getNumParams(); i != e; ++i, ++OpNum) {
4511 Ops.push_back(getValue(Record, OpNum, NextValueNo,
4512 FTy->getParamType(i)));
4513 ArgsFullTys.push_back(FullFTy->getParamType(i));
4514 if (!Ops.back())
4515 return error("Invalid record");
4516 }
4517
4518 if (!FTy->isVarArg()) {
4519 if (Record.size() != OpNum)
4520 return error("Invalid record");
4521 } else {
4522 // Read type/value pairs for varargs params.
4523 while (OpNum != Record.size()) {
4524 Value *Op;
4525 Type *FullTy;
4526 if (getValueTypePair(Record, OpNum, NextValueNo, Op, &FullTy))
4527 return error("Invalid record");
4528 Ops.push_back(Op);
4529 ArgsFullTys.push_back(FullTy);
4530 }
4531 }
4532
4533 I = InvokeInst::Create(FTy, Callee, NormalBB, UnwindBB, Ops,
4534 OperandBundles);
4535 FullTy = FullFTy->getReturnType();
4536 OperandBundles.clear();
4537 InstructionList.push_back(I);
4538 cast<InvokeInst>(I)->setCallingConv(
4539 static_cast<CallingConv::ID>(CallingConv::MaxID & CCInfo));
4540 cast<InvokeInst>(I)->setAttributes(PAL);
4541 propagateByValTypes(cast<CallBase>(I), ArgsFullTys);
4542
4543 break;
4544 }
4545 case bitc::FUNC_CODE_INST_RESUME: { // RESUME: [opval]
4546 unsigned Idx = 0;
4547 Value *Val = nullptr;
4548 if (getValueTypePair(Record, Idx, NextValueNo, Val))
4549 return error("Invalid record");
4550 I = ResumeInst::Create(Val);
4551 InstructionList.push_back(I);
4552 break;
4553 }
4554 case bitc::FUNC_CODE_INST_CALLBR: {
4555 // CALLBR: [attr, cc, norm, transfs, fty, fnid, args]
4556 unsigned OpNum = 0;
4557 AttributeList PAL = getAttributes(Record[OpNum++]);
4558 unsigned CCInfo = Record[OpNum++];
4559
4560 BasicBlock *DefaultDest = getBasicBlock(Record[OpNum++]);
4561 unsigned NumIndirectDests = Record[OpNum++];
4562 SmallVector<BasicBlock *, 16> IndirectDests;
4563 for (unsigned i = 0, e = NumIndirectDests; i != e; ++i)
4564 IndirectDests.push_back(getBasicBlock(Record[OpNum++]));
4565
4566 FunctionType *FTy = nullptr;
4567 FunctionType *FullFTy = nullptr;
4568 if ((CCInfo >> bitc::CALL_EXPLICIT_TYPE) & 1) {
4569 FullFTy =
4570 dyn_cast<FunctionType>(getFullyStructuredTypeByID(Record[OpNum++]));
4571 if (!FullFTy)
4572 return error("Explicit call type is not a function type");
4573 FTy = cast<FunctionType>(flattenPointerTypes(FullFTy));
4574 }
4575
4576 Value *Callee;
4577 if (getValueTypePair(Record, OpNum, NextValueNo, Callee, &FullTy))
4578 return error("Invalid record");
4579
4580 PointerType *OpTy = dyn_cast<PointerType>(Callee->getType());
4581 if (!OpTy)
4582 return error("Callee is not a pointer type");
4583 if (!FTy) {
4584 FullFTy =
4585 dyn_cast<FunctionType>(cast<PointerType>(FullTy)->getElementType());
4586 if (!FullFTy)
4587 return error("Callee is not of pointer to function type");
4588 FTy = cast<FunctionType>(flattenPointerTypes(FullFTy));
4589 } else if (getPointerElementFlatType(FullTy) != FTy)
4590 return error("Explicit call type does not match pointee type of "
4591 "callee operand");
4592 if (Record.size() < FTy->getNumParams() + OpNum)
4593 return error("Insufficient operands to call");
4594
4595 SmallVector<Value*, 16> Args;
4596 // Read the fixed params.
4597 for (unsigned i = 0, e = FTy->getNumParams(); i != e; ++i, ++OpNum) {
4598 if (FTy->getParamType(i)->isLabelTy())
4599 Args.push_back(getBasicBlock(Record[OpNum]));
4600 else
4601 Args.push_back(getValue(Record, OpNum, NextValueNo,
4602 FTy->getParamType(i)));
4603 if (!Args.back())
4604 return error("Invalid record");
4605 }
4606
4607 // Read type/value pairs for varargs params.
4608 if (!FTy->isVarArg()) {
4609 if (OpNum != Record.size())
4610 return error("Invalid record");
4611 } else {
4612 while (OpNum != Record.size()) {
4613 Value *Op;
4614 if (getValueTypePair(Record, OpNum, NextValueNo, Op))
4615 return error("Invalid record");
4616 Args.push_back(Op);
4617 }
4618 }
4619
4620 I = CallBrInst::Create(FTy, Callee, DefaultDest, IndirectDests, Args,
4621 OperandBundles);
4622 FullTy = FullFTy->getReturnType();
4623 OperandBundles.clear();
4624 InstructionList.push_back(I);
4625 cast<CallBrInst>(I)->setCallingConv(
4626 static_cast<CallingConv::ID>((0x7ff & CCInfo) >> bitc::CALL_CCONV));
4627 cast<CallBrInst>(I)->setAttributes(PAL);
4628 break;
4629 }
4630 case bitc::FUNC_CODE_INST_UNREACHABLE: // UNREACHABLE
4631 I = new UnreachableInst(Context);
4632 InstructionList.push_back(I);
4633 break;
4634 case bitc::FUNC_CODE_INST_PHI: { // PHI: [ty, val0,bb0, ...]
4635 if (Record.size() < 1)
4636 return error("Invalid record");
4637 // The first record specifies the type.
4638 FullTy = getFullyStructuredTypeByID(Record[0]);
4639 Type *Ty = flattenPointerTypes(FullTy);
4640 if (!Ty)
4641 return error("Invalid record");
4642
4643 // Phi arguments are pairs of records of [value, basic block].
4644 // There is an optional final record for fast-math-flags if this phi has a
4645 // floating-point type.
4646 size_t NumArgs = (Record.size() - 1) / 2;
4647 PHINode *PN = PHINode::Create(Ty, NumArgs);
4648 if ((Record.size() - 1) % 2 == 1 && !isa<FPMathOperator>(PN))
4649 return error("Invalid record");
4650 InstructionList.push_back(PN);
4651
4652 for (unsigned i = 0; i != NumArgs; i++) {
4653 Value *V;
4654 // With the new function encoding, it is possible that operands have
4655 // negative IDs (for forward references). Use a signed VBR
4656 // representation to keep the encoding small.
4657 if (UseRelativeIDs)
4658 V = getValueSigned(Record, i * 2 + 1, NextValueNo, Ty);
4659 else
4660 V = getValue(Record, i * 2 + 1, NextValueNo, Ty);
4661 BasicBlock *BB = getBasicBlock(Record[i * 2 + 2]);
4662 if (!V || !BB)
4663 return error("Invalid record");
4664 PN->addIncoming(V, BB);
4665 }
4666 I = PN;
4667
4668 // If there are an even number of records, the final record must be FMF.
4669 if (Record.size() % 2 == 0) {
4670 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-10~++20200112100611+7fa5290d5bd/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 4670, __PRETTY_FUNCTION__))
;
4671 FastMathFlags FMF = getDecodedFastMathFlags(Record[Record.size() - 1]);
4672 if (FMF.any())
4673 I->setFastMathFlags(FMF);
4674 }
4675
4676 break;
4677 }
4678
4679 case bitc::FUNC_CODE_INST_LANDINGPAD:
4680 case bitc::FUNC_CODE_INST_LANDINGPAD_OLD: {
4681 // LANDINGPAD: [ty, val, val, num, (id0,val0 ...)?]
4682 unsigned Idx = 0;
4683 if (BitCode == bitc::FUNC_CODE_INST_LANDINGPAD) {
4684 if (Record.size() < 3)
4685 return error("Invalid record");
4686 } else {
4687 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-10~++20200112100611+7fa5290d5bd/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 4687, __PRETTY_FUNCTION__))
;
4688 if (Record.size() < 4)
4689 return error("Invalid record");
4690 }
4691 FullTy = getFullyStructuredTypeByID(Record[Idx++]);
4692 Type *Ty = flattenPointerTypes(FullTy);
4693 if (!Ty)
4694 return error("Invalid record");
4695 if (BitCode == bitc::FUNC_CODE_INST_LANDINGPAD_OLD) {
4696 Value *PersFn = nullptr;
4697 if (getValueTypePair(Record, Idx, NextValueNo, PersFn))
4698 return error("Invalid record");
4699
4700 if (!F->hasPersonalityFn())
4701 F->setPersonalityFn(cast<Constant>(PersFn));
4702 else if (F->getPersonalityFn() != cast<Constant>(PersFn))
4703 return error("Personality function mismatch");
4704 }
4705
4706 bool IsCleanup = !!Record[Idx++];
4707 unsigned NumClauses = Record[Idx++];
4708 LandingPadInst *LP = LandingPadInst::Create(Ty, NumClauses);
4709 LP->setCleanup(IsCleanup);
4710 for (unsigned J = 0; J != NumClauses; ++J) {
4711 LandingPadInst::ClauseType CT =
4712 LandingPadInst::ClauseType(Record[Idx++]); (void)CT;
4713 Value *Val;
4714
4715 if (getValueTypePair(Record, Idx, NextValueNo, Val)) {
4716 delete LP;
4717 return error("Invalid record");
4718 }
4719
4720 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-10~++20200112100611+7fa5290d5bd/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 4722, __PRETTY_FUNCTION__))
4721 !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-10~++20200112100611+7fa5290d5bd/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 4722, __PRETTY_FUNCTION__))
4722 "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-10~++20200112100611+7fa5290d5bd/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 4722, __PRETTY_FUNCTION__))
;
4723 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-10~++20200112100611+7fa5290d5bd/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 4725, __PRETTY_FUNCTION__))
4724 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-10~++20200112100611+7fa5290d5bd/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 4725, __PRETTY_FUNCTION__))
4725 "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-10~++20200112100611+7fa5290d5bd/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 4725, __PRETTY_FUNCTION__))
;
4726 LP->addClause(cast<Constant>(Val));
4727 }
4728
4729 I = LP;
4730 InstructionList.push_back(I);
4731 break;
4732 }
4733
4734 case bitc::FUNC_CODE_INST_ALLOCA: { // ALLOCA: [instty, opty, op, align]
4735 if (Record.size() != 4)
4736 return error("Invalid record");
4737 uint64_t AlignRecord = Record[3];
4738 const uint64_t InAllocaMask = uint64_t(1) << 5;
4739 const uint64_t ExplicitTypeMask = uint64_t(1) << 6;
4740 const uint64_t SwiftErrorMask = uint64_t(1) << 7;
4741 const uint64_t FlagMask = InAllocaMask | ExplicitTypeMask |
4742 SwiftErrorMask;
4743 bool InAlloca = AlignRecord & InAllocaMask;
4744 bool SwiftError = AlignRecord & SwiftErrorMask;
4745 FullTy = getFullyStructuredTypeByID(Record[0]);
4746 Type *Ty = flattenPointerTypes(FullTy);
4747 if ((AlignRecord & ExplicitTypeMask) == 0) {
4748 auto *PTy = dyn_cast_or_null<PointerType>(Ty);
4749 if (!PTy)
4750 return error("Old-style alloca with a non-pointer type");
4751 std::tie(FullTy, Ty) = getPointerElementTypes(FullTy);
4752 }
4753 Type *OpTy = getTypeByID(Record[1]);
4754 Value *Size = getFnValueByID(Record[2], OpTy);
4755 MaybeAlign Align;
4756 if (Error Err = parseAlignmentValue(AlignRecord & ~FlagMask, Align)) {
4757 return Err;
4758 }
4759 if (!Ty || !Size)
4760 return error("Invalid record");
4761
4762 // FIXME: Make this an optional field.
4763 const DataLayout &DL = TheModule->getDataLayout();
4764 unsigned AS = DL.getAllocaAddrSpace();
4765
4766 AllocaInst *AI = new AllocaInst(Ty, AS, Size, Align);
4767 AI->setUsedWithInAlloca(InAlloca);
4768 AI->setSwiftError(SwiftError);
4769 I = AI;
4770 FullTy = PointerType::get(FullTy, AS);
4771 InstructionList.push_back(I);
4772 break;
4773 }
4774 case bitc::FUNC_CODE_INST_LOAD: { // LOAD: [opty, op, align, vol]
4775 unsigned OpNum = 0;
4776 Value *Op;
4777 if (getValueTypePair(Record, OpNum, NextValueNo, Op, &FullTy) ||
4778 (OpNum + 2 != Record.size() && OpNum + 3 != Record.size()))
4779 return error("Invalid record");
4780
4781 if (!isa<PointerType>(Op->getType()))
4782 return error("Load operand is not a pointer type");
4783
4784 Type *Ty = nullptr;
4785 if (OpNum + 3 == Record.size()) {
4786 FullTy = getFullyStructuredTypeByID(Record[OpNum++]);
4787 Ty = flattenPointerTypes(FullTy);
4788 } else
4789 std::tie(FullTy, Ty) = getPointerElementTypes(FullTy);
4790
4791 if (Error Err = typeCheckLoadStoreInst(Ty, Op->getType()))
4792 return Err;
4793
4794 MaybeAlign Align;
4795 if (Error Err = parseAlignmentValue(Record[OpNum], Align))
4796 return Err;
4797 I = new LoadInst(Ty, Op, "", Record[OpNum + 1], Align);
4798 InstructionList.push_back(I);
4799 break;
4800 }
4801 case bitc::FUNC_CODE_INST_LOADATOMIC: {
4802 // LOADATOMIC: [opty, op, align, vol, ordering, ssid]
4803 unsigned OpNum = 0;
4804 Value *Op;
4805 if (getValueTypePair(Record, OpNum, NextValueNo, Op, &FullTy) ||
4806 (OpNum + 4 != Record.size() && OpNum + 5 != Record.size()))
4807 return error("Invalid record");
4808
4809 if (!isa<PointerType>(Op->getType()))
4810 return error("Load operand is not a pointer type");
4811
4812 Type *Ty = nullptr;
4813 if (OpNum + 5 == Record.size()) {
4814 FullTy = getFullyStructuredTypeByID(Record[OpNum++]);
4815 Ty = flattenPointerTypes(FullTy);
4816 } else
4817 std::tie(FullTy, Ty) = getPointerElementTypes(FullTy);
4818
4819 if (Error Err = typeCheckLoadStoreInst(Ty, Op->getType()))
4820 return Err;
4821
4822 AtomicOrdering Ordering = getDecodedOrdering(Record[OpNum + 2]);
4823 if (Ordering == AtomicOrdering::NotAtomic ||
4824 Ordering == AtomicOrdering::Release ||
4825 Ordering == AtomicOrdering::AcquireRelease)
4826 return error("Invalid record");
4827 if (Ordering != AtomicOrdering::NotAtomic && Record[OpNum] == 0)
4828 return error("Invalid record");
4829 SyncScope::ID SSID = getDecodedSyncScopeID(Record[OpNum + 3]);
4830
4831 MaybeAlign Align;
4832 if (Error Err = parseAlignmentValue(Record[OpNum], Align))
4833 return Err;
4834 I = new LoadInst(Ty, Op, "", Record[OpNum + 1], Align, Ordering, SSID);
4835 InstructionList.push_back(I);
4836 break;
4837 }
4838 case bitc::FUNC_CODE_INST_STORE:
4839 case bitc::FUNC_CODE_INST_STORE_OLD: { // STORE2:[ptrty, ptr, val, align, vol]
4840 unsigned OpNum = 0;
4841 Value *Val, *Ptr;
4842 Type *FullTy;
4843 if (getValueTypePair(Record, OpNum, NextValueNo, Ptr, &FullTy) ||
4844 (BitCode == bitc::FUNC_CODE_INST_STORE
4845 ? getValueTypePair(Record, OpNum, NextValueNo, Val)
4846 : popValue(Record, OpNum, NextValueNo,
4847 getPointerElementFlatType(FullTy), Val)) ||
4848 OpNum + 2 != Record.size())
4849 return error("Invalid record");
4850
4851 if (Error Err = typeCheckLoadStoreInst(Val->getType(), Ptr->getType()))
4852 return Err;
4853 MaybeAlign Align;
4854 if (Error Err = parseAlignmentValue(Record[OpNum], Align))
4855 return Err;
4856 I = new StoreInst(Val, Ptr, Record[OpNum + 1], Align);
4857 InstructionList.push_back(I);
4858 break;
4859 }
4860 case bitc::FUNC_CODE_INST_STOREATOMIC:
4861 case bitc::FUNC_CODE_INST_STOREATOMIC_OLD: {
4862 // STOREATOMIC: [ptrty, ptr, val, align, vol, ordering, ssid]
4863 unsigned OpNum = 0;
4864 Value *Val, *Ptr;
4865 Type *FullTy;
4866 if (getValueTypePair(Record, OpNum, NextValueNo, Ptr, &FullTy) ||
4867 !isa<PointerType>(Ptr->getType()) ||
4868 (BitCode == bitc::FUNC_CODE_INST_STOREATOMIC
4869 ? getValueTypePair(Record, OpNum, NextValueNo, Val)
4870 : popValue(Record, OpNum, NextValueNo,
4871 getPointerElementFlatType(FullTy), Val)) ||
4872 OpNum + 4 != Record.size())
4873 return error("Invalid record");
4874
4875 if (Error Err = typeCheckLoadStoreInst(Val->getType(), Ptr->getType()))
4876 return Err;
4877 AtomicOrdering Ordering = getDecodedOrdering(Record[OpNum + 2]);
4878 if (Ordering == AtomicOrdering::NotAtomic ||
4879 Ordering == AtomicOrdering::Acquire ||
4880 Ordering == AtomicOrdering::AcquireRelease)
4881 return error("Invalid record");
4882 SyncScope::ID SSID = getDecodedSyncScopeID(Record[OpNum + 3]);
4883 if (Ordering != AtomicOrdering::NotAtomic && Record[OpNum] == 0)
4884 return error("Invalid record");
4885
4886 MaybeAlign Align;
4887 if (Error Err = parseAlignmentValue(Record[OpNum], Align))
4888 return Err;
4889 I = new StoreInst(Val, Ptr, Record[OpNum + 1], Align, Ordering, SSID);
4890 InstructionList.push_back(I);
4891 break;
4892 }
4893 case bitc::FUNC_CODE_INST_CMPXCHG_OLD:
4894 case bitc::FUNC_CODE_INST_CMPXCHG: {
4895 // CMPXCHG:[ptrty, ptr, cmp, new, vol, successordering, ssid,
4896 // failureordering?, isweak?]
4897 unsigned OpNum = 0;
4898 Value *Ptr, *Cmp, *New;
4899 if (getValueTypePair(Record, OpNum, NextValueNo, Ptr, &FullTy))
21
Calling 'BitcodeReader::getValueTypePair'
33
Returning from 'BitcodeReader::getValueTypePair'
34
Taking false branch
4900 return error("Invalid record");
4901
4902 if (!isa<PointerType>(Ptr->getType()))
35
Assuming the object is a 'PointerType'
36
Taking false branch
4903 return error("Cmpxchg operand is not a pointer type");
4904
4905 if (BitCode
36.1
'BitCode' is not equal to FUNC_CODE_INST_CMPXCHG
36.1
'BitCode' is not equal to FUNC_CODE_INST_CMPXCHG
== bitc::FUNC_CODE_INST_CMPXCHG) {
37
Taking false branch
4906 if (getValueTypePair(Record, OpNum, NextValueNo, Cmp, &FullTy))
4907 return error("Invalid record");
4908 } else if (popValue(Record, OpNum, NextValueNo,
38
Calling 'BitcodeReader::popValue'
41
Returning from 'BitcodeReader::popValue'
42
Taking false branch
4909 getPointerElementFlatType(FullTy), Cmp))
4910 return error("Invalid record");
4911 else
4912 FullTy = cast<PointerType>(FullTy)->getElementType();
43
'FullTy' is a 'PointerType'
4913
4914 if (popValue(Record, OpNum, NextValueNo, Cmp->getType(), New) ||
44
Calling 'BitcodeReader::popValue'
47
Returning from 'BitcodeReader::popValue'
50
Taking false branch
4915 Record.size() < OpNum + 3 || Record.size() > OpNum + 5)
48
Assuming the condition is false
49
Assuming the condition is false
4916 return error("Invalid record");
4917
4918 AtomicOrdering SuccessOrdering = getDecodedOrdering(Record[OpNum + 1]);
4919 if (SuccessOrdering
50.1
'SuccessOrdering' is not equal to NotAtomic
50.1
'SuccessOrdering' is not equal to NotAtomic
== AtomicOrdering::NotAtomic ||
51
Taking false branch
4920 SuccessOrdering
50.2
'SuccessOrdering' is not equal to Unordered
50.2
'SuccessOrdering' is not equal to Unordered
== AtomicOrdering::Unordered)
4921 return error("Invalid record");
4922 SyncScope::ID SSID = getDecodedSyncScopeID(Record[OpNum + 2]);
4923
4924 if (Error Err = typeCheckLoadStoreInst(Cmp->getType(), Ptr->getType()))
52
Assuming the condition is false
53
Taking false branch
4925 return Err;
4926 AtomicOrdering FailureOrdering;
4927 if (Record.size() < 7)
54
Assuming the condition is false
55
Taking false branch
4928 FailureOrdering =
4929 AtomicCmpXchgInst::getStrongestFailureOrdering(SuccessOrdering);
4930 else
4931 FailureOrdering = getDecodedOrdering(Record[OpNum + 3]);
4932
4933 I = new AtomicCmpXchgInst(Ptr, Cmp, New, SuccessOrdering, FailureOrdering,
4934 SSID);
4935 FullTy = StructType::get(Context, {FullTy, Type::getInt1Ty(Context)});
4936 cast<AtomicCmpXchgInst>(I)->setVolatile(Record[OpNum]);
56
'I' is a 'AtomicCmpXchgInst'
4937
4938 if (Record.size() < 8) {
57
Assuming the condition is true
58
Taking true branch
4939 // Before weak cmpxchgs existed, the instruction simply returned the
4940 // value loaded from memory, so bitcode files from that era will be
4941 // expecting the first component of a modern cmpxchg.
4942 CurBB->getInstList().push_back(I);
59
Called C++ object pointer is null
4943 I = ExtractValueInst::Create(I, 0);
4944 FullTy = cast<StructType>(FullTy)->getElementType(0);
4945 } else {
4946 cast<AtomicCmpXchgInst>(I)->setWeak(Record[OpNum+4]);
4947 }
4948
4949 InstructionList.push_back(I);
4950 break;
4951 }
4952 case bitc::FUNC_CODE_INST_ATOMICRMW: {
4953 // ATOMICRMW:[ptrty, ptr, val, op, vol, ordering, ssid]
4954 unsigned OpNum = 0;
4955 Value *Ptr, *Val;
4956 if (getValueTypePair(Record, OpNum, NextValueNo, Ptr, &FullTy) ||
4957 !isa<PointerType>(Ptr->getType()) ||
4958 popValue(Record, OpNum, NextValueNo,
4959 getPointerElementFlatType(FullTy), Val) ||
4960 OpNum + 4 != Record.size())
4961 return error("Invalid record");
4962 AtomicRMWInst::BinOp Operation = getDecodedRMWOperation(Record[OpNum]);
4963 if (Operation < AtomicRMWInst::FIRST_BINOP ||
4964 Operation > AtomicRMWInst::LAST_BINOP)
4965 return error("Invalid record");
4966 AtomicOrdering Ordering = getDecodedOrdering(Record[OpNum + 2]);
4967 if (Ordering == AtomicOrdering::NotAtomic ||
4968 Ordering == AtomicOrdering::Unordered)
4969 return error("Invalid record");
4970 SyncScope::ID SSID = getDecodedSyncScopeID(Record[OpNum + 3]);
4971 I = new AtomicRMWInst(Operation, Ptr, Val, Ordering, SSID);
4972 FullTy = getPointerElementFlatType(FullTy);
4973 cast<AtomicRMWInst>(I)->setVolatile(Record[OpNum+1]);
4974 InstructionList.push_back(I);
4975 break;
4976 }
4977 case bitc::FUNC_CODE_INST_FENCE: { // FENCE:[ordering, ssid]
4978 if (2 != Record.size())
4979 return error("Invalid record");
4980 AtomicOrdering Ordering = getDecodedOrdering(Record[0]);
4981 if (Ordering == AtomicOrdering::NotAtomic ||
4982 Ordering == AtomicOrdering::Unordered ||
4983 Ordering == AtomicOrdering::Monotonic)
4984 return error("Invalid record");
4985 SyncScope::ID SSID = getDecodedSyncScopeID(Record[1]);
4986 I = new FenceInst(Context, Ordering, SSID);
4987 InstructionList.push_back(I);
4988 break;
4989 }
4990 case bitc::FUNC_CODE_INST_CALL: {
4991 // CALL: [paramattrs, cc, fmf, fnty, fnid, arg0, arg1...]
4992 if (Record.size() < 3)
4993 return error("Invalid record");
4994
4995 unsigned OpNum = 0;
4996 AttributeList PAL = getAttributes(Record[OpNum++]);
4997 unsigned CCInfo = Record[OpNum++];
4998
4999 FastMathFlags FMF;
5000 if ((CCInfo >> bitc::CALL_FMF) & 1) {
5001 FMF = getDecodedFastMathFlags(Record[OpNum++]);
5002 if (!FMF.any())
5003 return error("Fast math flags indicator set for call with no FMF");
5004 }
5005
5006 FunctionType *FTy = nullptr;
5007 FunctionType *FullFTy = nullptr;
5008 if ((CCInfo >> bitc::CALL_EXPLICIT_TYPE) & 1) {
5009 FullFTy =
5010 dyn_cast<FunctionType>(getFullyStructuredTypeByID(Record[OpNum++]));
5011 if (!FullFTy)
5012 return error("Explicit call type is not a function type");
5013 FTy = cast<FunctionType>(flattenPointerTypes(FullFTy));
5014 }
5015
5016 Value *Callee;
5017 if (getValueTypePair(Record, OpNum, NextValueNo, Callee, &FullTy))
5018 return error("Invalid record");
5019
5020 PointerType *OpTy = dyn_cast<PointerType>(Callee->getType());
5021 if (!OpTy)
5022 return error("Callee is not a pointer type");
5023 if (!FTy) {
5024 FullFTy =
5025 dyn_cast<FunctionType>(cast<PointerType>(FullTy)->getElementType());
5026 if (!FullFTy)
5027 return error("Callee is not of pointer to function type");
5028 FTy = cast<FunctionType>(flattenPointerTypes(FullFTy));
5029 } else if (getPointerElementFlatType(FullTy) != FTy)
5030 return error("Explicit call type does not match pointee type of "
5031 "callee operand");
5032 if (Record.size() < FTy->getNumParams() + OpNum)
5033 return error("Insufficient operands to call");
5034
5035 SmallVector<Value*, 16> Args;
5036 SmallVector<Type*, 16> ArgsFullTys;
5037 // Read the fixed params.
5038 for (unsigned i = 0, e = FTy->getNumParams(); i != e; ++i, ++OpNum) {
5039 if (FTy->getParamType(i)->isLabelTy())
5040 Args.push_back(getBasicBlock(Record[OpNum]));
5041 else
5042 Args.push_back(getValue(Record, OpNum, NextValueNo,
5043 FTy->getParamType(i)));
5044 ArgsFullTys.push_back(FullFTy->getParamType(i));
5045 if (!Args.back())
5046 return error("Invalid record");
5047 }
5048
5049 // Read type/value pairs for varargs params.
5050 if (!FTy->isVarArg()) {
5051 if (OpNum != Record.size())
5052 return error("Invalid record");
5053 } else {
5054 while (OpNum != Record.size()) {
5055 Value *Op;
5056 Type *FullTy;
5057 if (getValueTypePair(Record, OpNum, NextValueNo, Op, &FullTy))
5058 return error("Invalid record");
5059 Args.push_back(Op);
5060 ArgsFullTys.push_back(FullTy);
5061 }
5062 }
5063
5064 I = CallInst::Create(FTy, Callee, Args, OperandBundles);
5065 FullTy = FullFTy->getReturnType();
5066 OperandBundles.clear();
5067 InstructionList.push_back(I);
5068 cast<CallInst>(I)->setCallingConv(
5069 static_cast<CallingConv::ID>((0x7ff & CCInfo) >> bitc::CALL_CCONV));
5070 CallInst::TailCallKind TCK = CallInst::TCK_None;
5071 if (CCInfo & 1 << bitc::CALL_TAIL)
5072 TCK = CallInst::TCK_Tail;
5073 if (CCInfo & (1 << bitc::CALL_MUSTTAIL))
5074 TCK = CallInst::TCK_MustTail;
5075 if (CCInfo & (1 << bitc::CALL_NOTAIL))
5076 TCK = CallInst::TCK_NoTail;
5077 cast<CallInst>(I)->setTailCallKind(TCK);
5078 cast<CallInst>(I)->setAttributes(PAL);
5079 propagateByValTypes(cast<CallBase>(I), ArgsFullTys);
5080 if (FMF.any()) {
5081 if (!isa<FPMathOperator>(I))
5082 return error("Fast-math-flags specified for call without "
5083 "floating-point scalar or vector return type");
5084 I->setFastMathFlags(FMF);
5085 }
5086 break;
5087 }
5088 case bitc::FUNC_CODE_INST_VAARG: { // VAARG: [valistty, valist, instty]
5089 if (Record.size() < 3)
5090 return error("Invalid record");
5091 Type *OpTy = getTypeByID(Record[0]);
5092 Value *Op = getValue(Record, 1, NextValueNo, OpTy);
5093 FullTy = getFullyStructuredTypeByID(Record[2]);
5094 Type *ResTy = flattenPointerTypes(FullTy);
5095 if (!OpTy || !Op || !ResTy)
5096 return error("Invalid record");
5097 I = new VAArgInst(Op, ResTy);
5098 InstructionList.push_back(I);
5099 break;
5100 }
5101
5102 case bitc::FUNC_CODE_OPERAND_BUNDLE: {
5103 // A call or an invoke can be optionally prefixed with some variable
5104 // number of operand bundle blocks. These blocks are read into
5105 // OperandBundles and consumed at the next call or invoke instruction.
5106
5107 if (Record.size() < 1 || Record[0] >= BundleTags.size())
5108 return error("Invalid record");
5109
5110 std::vector<Value *> Inputs;
5111
5112 unsigned OpNum = 1;
5113 while (OpNum != Record.size()) {
5114 Value *Op;
5115 if (getValueTypePair(Record, OpNum, NextValueNo, Op))
5116 return error("Invalid record");
5117 Inputs.push_back(Op);
5118 }
5119
5120 OperandBundles.emplace_back(BundleTags[Record[0]], std::move(Inputs));
5121 continue;
5122 }
5123
5124 case bitc::FUNC_CODE_INST_FREEZE: { // FREEZE: [opty,opval]
5125 unsigned OpNum = 0;
5126 Value *Op = nullptr;
5127 if (getValueTypePair(Record, OpNum, NextValueNo, Op, &FullTy))
5128 return error("Invalid record");
5129 if (OpNum != Record.size())
5130 return error("Invalid record");
5131
5132 I = new FreezeInst(Op);
5133 InstructionList.push_back(I);
5134 break;
5135 }
5136 }
5137
5138 // Add instruction to end of current BB. If there is no current BB, reject
5139 // this file.
5140 if (!CurBB) {
5141 I->deleteValue();
5142 return error("Invalid instruction with no BB");
5143 }
5144 if (!OperandBundles.empty()) {
5145 I->deleteValue();
5146 return error("Operand bundles found with no consumer");
5147 }
5148 CurBB->getInstList().push_back(I);
5149
5150 // If this was a terminator instruction, move to the next block.
5151 if (I->isTerminator()) {
5152 ++CurBBNo;
5153 CurBB = CurBBNo < FunctionBBs.size() ? FunctionBBs[CurBBNo] : nullptr;
5154 }
5155
5156 // Non-void values get registered in the value table for future use.
5157 if (!I->getType()->isVoidTy()) {
5158 if (!FullTy) {
5159 FullTy = I->getType();
5160 assert(((!FullTy->isPointerTy() && !isa<StructType>
(FullTy) && !isa<ArrayType>(FullTy) && (
!isa<VectorType>(FullTy) || FullTy->getVectorElementType
()->isFloatingPointTy() || FullTy->getVectorElementType
()->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) || FullTy->getVectorElementType()->isFloatingPointTy() || FullTy->getVectorElementType()->isIntegerTy()) && \"Structured types must be assigned with corresponding non-opaque \" \"pointer type\""
, "/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 5167, __PRETTY_FUNCTION__))
5161 !FullTy->isPointerTy() && !isa<StructType>(FullTy) &&((!FullTy->isPointerTy() && !isa<StructType>
(FullTy) && !isa<ArrayType>(FullTy) && (
!isa<VectorType>(FullTy) || FullTy->getVectorElementType
()->isFloatingPointTy() || FullTy->getVectorElementType
()->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) || FullTy->getVectorElementType()->isFloatingPointTy() || FullTy->getVectorElementType()->isIntegerTy()) && \"Structured types must be assigned with corresponding non-opaque \" \"pointer type\""
, "/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 5167, __PRETTY_FUNCTION__))
5162 !isa<ArrayType>(FullTy) &&((!FullTy->isPointerTy() && !isa<StructType>
(FullTy) && !isa<ArrayType>(FullTy) && (
!isa<VectorType>(FullTy) || FullTy->getVectorElementType
()->isFloatingPointTy() || FullTy->getVectorElementType
()->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) || FullTy->getVectorElementType()->isFloatingPointTy() || FullTy->getVectorElementType()->isIntegerTy()) && \"Structured types must be assigned with corresponding non-opaque \" \"pointer type\""
, "/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 5167, __PRETTY_FUNCTION__))
5163 (!isa<VectorType>(FullTy) ||((!FullTy->isPointerTy() && !isa<StructType>
(FullTy) && !isa<ArrayType>(FullTy) && (
!isa<VectorType>(FullTy) || FullTy->getVectorElementType
()->isFloatingPointTy() || FullTy->getVectorElementType
()->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) || FullTy->getVectorElementType()->isFloatingPointTy() || FullTy->getVectorElementType()->isIntegerTy()) && \"Structured types must be assigned with corresponding non-opaque \" \"pointer type\""
, "/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 5167, __PRETTY_FUNCTION__))
5164 FullTy->getVectorElementType()->isFloatingPointTy() ||((!FullTy->isPointerTy() && !isa<StructType>
(FullTy) && !isa<ArrayType>(FullTy) && (
!isa<VectorType>(FullTy) || FullTy->getVectorElementType
()->isFloatingPointTy() || FullTy->getVectorElementType
()->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) || FullTy->getVectorElementType()->isFloatingPointTy() || FullTy->getVectorElementType()->isIntegerTy()) && \"Structured types must be assigned with corresponding non-opaque \" \"pointer type\""
, "/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 5167, __PRETTY_FUNCTION__))
5165 FullTy->getVectorElementType()->isIntegerTy()) &&((!FullTy->isPointerTy() && !isa<StructType>
(FullTy) && !isa<ArrayType>(FullTy) && (
!isa<VectorType>(FullTy) || FullTy->getVectorElementType
()->isFloatingPointTy() || FullTy->getVectorElementType
()->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) || FullTy->getVectorElementType()->isFloatingPointTy() || FullTy->getVectorElementType()->isIntegerTy()) && \"Structured types must be assigned with corresponding non-opaque \" \"pointer type\""
, "/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 5167, __PRETTY_FUNCTION__))
5166 "Structured types must be assigned with corresponding non-opaque "((!FullTy->isPointerTy() && !isa<StructType>
(FullTy) && !isa<ArrayType>(FullTy) && (
!isa<VectorType>(FullTy) || FullTy->getVectorElementType
()->isFloatingPointTy() || FullTy->getVectorElementType
()->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) || FullTy->getVectorElementType()->isFloatingPointTy() || FullTy->getVectorElementType()->isIntegerTy()) && \"Structured types must be assigned with corresponding non-opaque \" \"pointer type\""
, "/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 5167, __PRETTY_FUNCTION__))
5167 "pointer type")((!FullTy->isPointerTy() && !isa<StructType>
(FullTy) && !isa<ArrayType>(FullTy) && (
!isa<VectorType>(FullTy) || FullTy->getVectorElementType
()->isFloatingPointTy() || FullTy->getVectorElementType
()->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) || FullTy->getVectorElementType()->isFloatingPointTy() || FullTy->getVectorElementType()->isIntegerTy()) && \"Structured types must be assigned with corresponding non-opaque \" \"pointer type\""
, "/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 5167, __PRETTY_FUNCTION__))
;
5168 }
5169
5170 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-10~++20200112100611+7fa5290d5bd/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 5171, __PRETTY_FUNCTION__))
5171 "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-10~++20200112100611+7fa5290d5bd/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 5171, __PRETTY_FUNCTION__))
;
5172 ValueList.assignValue(I, NextValueNo++, FullTy);
5173 }
5174 }
5175
5176OutOfRecordLoop:
5177
5178 if (!OperandBundles.empty())
5179 return error("Operand bundles found with no consumer");
5180
5181 // Check the function list for unresolved values.
5182 if (Argument *A = dyn_cast<Argument>(ValueList.back())) {
5183 if (!A->getParent()) {
5184 // We found at least one unresolved value. Nuke them all to avoid leaks.
5185 for (unsigned i = ModuleValueListSize, e = ValueList.size(); i != e; ++i){
5186 if ((A = dyn_cast_or_null<Argument>(ValueList[i])) && !A->getParent()) {
5187 A->replaceAllUsesWith(UndefValue::get(A->getType()));
5188 delete A;
5189 }
5190 }
5191 return error("Never resolved value found in function");
5192 }
5193 }
5194
5195 // Unexpected unresolved metadata about to be dropped.
5196 if (MDLoader->hasFwdRefs())
5197 return error("Invalid function metadata: outgoing forward refs");
5198
5199 // Trim the value list down to the size it was before we parsed this function.
5200 ValueList.shrinkTo(ModuleValueListSize);
5201 MDLoader->shrinkTo(ModuleMDLoaderSize);
5202 std::vector<BasicBlock*>().swap(FunctionBBs);
5203 return Error::success();
5204}
5205
5206/// Find the function body in the bitcode stream
5207Error BitcodeReader::findFunctionInStream(
5208 Function *F,
5209 DenseMap<Function *, uint64_t>::iterator DeferredFunctionInfoIterator) {
5210 while (DeferredFunctionInfoIterator->second == 0) {
5211 // This is the fallback handling for the old format bitcode that
5212 // didn't contain the function index in the VST, or when we have
5213 // an anonymous function which would not have a VST entry.
5214 // Assert that we have one of those two cases.
5215 assert(VSTOffset == 0 || !F->hasName())((VSTOffset == 0 || !F->hasName()) ? static_cast<void>
(0) : __assert_fail ("VSTOffset == 0 || !F->hasName()", "/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 5215, __PRETTY_FUNCTION__))
;
5216 // Parse the next body in the stream and set its position in the
5217 // DeferredFunctionInfo map.
5218 if (Error Err = rememberAndSkipFunctionBodies())
5219 return Err;
5220 }
5221 return Error::success();
5222}
5223
5224SyncScope::ID BitcodeReader::getDecodedSyncScopeID(unsigned Val) {
5225 if (Val == SyncScope::SingleThread || Val == SyncScope::System)
5226 return SyncScope::ID(Val);
5227 if (Val >= SSIDs.size())
5228 return SyncScope::System; // Map unknown synchronization scopes to system.
5229 return SSIDs[Val];
5230}
5231
5232//===----------------------------------------------------------------------===//
5233// GVMaterializer implementation
5234//===----------------------------------------------------------------------===//
5235
5236Error BitcodeReader::materialize(GlobalValue *GV) {
5237 Function *F = dyn_cast<Function>(GV);
5238 // If it's not a function or is already material, ignore the request.
5239 if (!F || !F->isMaterializable())
5240 return Error::success();
5241
5242 DenseMap<Function*, uint64_t>::iterator DFII = DeferredFunctionInfo.find(F);
5243 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-10~++20200112100611+7fa5290d5bd/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 5243, __PRETTY_FUNCTION__))
;
5244 // If its position is recorded as 0, its body is somewhere in the stream
5245 // but we haven't seen it yet.
5246 if (DFII->second == 0)
5247 if (Error Err = findFunctionInStream(F, DFII))
5248 return Err;
5249
5250 // Materialize metadata before parsing any function bodies.
5251 if (Error Err = materializeMetadata())
5252 return Err;
5253
5254 // Move the bit stream to the saved position of the deferred function body.
5255 if (Error JumpFailed = Stream.JumpToBit(DFII->second))
5256 return JumpFailed;
5257 if (Error Err = parseFunctionBody(F))
5258 return Err;
5259 F->setIsMaterializable(false);
5260
5261 if (StripDebugInfo)
5262 stripDebugInfo(*F);
5263
5264 // Upgrade any old intrinsic calls in the function.
5265 for (auto &I : UpgradedIntrinsics) {
5266 for (auto UI = I.first->materialized_user_begin(), UE = I.first->user_end();
5267 UI != UE;) {
5268 User *U = *UI;
5269 ++UI;
5270 if (CallInst *CI = dyn_cast<CallInst>(U))
5271 UpgradeIntrinsicCall(CI, I.second);
5272 }
5273 }
5274
5275 // Update calls to the remangled intrinsics
5276 for (auto &I : RemangledIntrinsics)
5277 for (auto UI = I.first->materialized_user_begin(), UE = I.first->user_end();
5278 UI != UE;)
5279 // Don't expect any other users than call sites
5280 CallSite(*UI++).setCalledFunction(I.second);
5281
5282 // Finish fn->subprogram upgrade for materialized functions.
5283 if (DISubprogram *SP = MDLoader->lookupSubprogramForFunction(F))
5284 F->setSubprogram(SP);
5285
5286 // Check if the TBAA Metadata are valid, otherwise we will need to strip them.
5287 if (!MDLoader->isStrippingTBAA()) {
5288 for (auto &I : instructions(F)) {
5289 MDNode *TBAA = I.getMetadata(LLVMContext::MD_tbaa);
5290 if (!TBAA || TBAAVerifyHelper.visitTBAAMetadata(I, TBAA))
5291 continue;
5292 MDLoader->setStripTBAA(true);
5293 stripTBAA(F->getParent());
5294 }
5295 }
5296
5297 // Bring in any functions that this function forward-referenced via
5298 // blockaddresses.
5299 return materializeForwardReferencedFunctions();
5300}
5301
5302Error BitcodeReader::materializeModule() {
5303 if (Error Err = materializeMetadata())
5304 return Err;
5305
5306 // Promise to materialize all forward references.
5307 WillMaterializeAllForwardRefs = true;
5308
5309 // Iterate over the module, deserializing any functions that are still on
5310 // disk.
5311 for (Function &F : *TheModule) {
5312 if (Error Err = materialize(&F))
5313 return Err;
5314 }
5315 // At this point, if there are any function bodies, parse the rest of
5316 // the bits in the module past the last function block we have recorded
5317 // through either lazy scanning or the VST.
5318 if (LastFunctionBlockBit || NextUnreadBit)
5319 if (Error Err = parseModule(LastFunctionBlockBit > NextUnreadBit
5320 ? LastFunctionBlockBit
5321 : NextUnreadBit))
5322 return Err;
5323
5324 // Check that all block address forward references got resolved (as we
5325 // promised above).
5326 if (!BasicBlockFwdRefs.empty())
5327 return error("Never resolved function from blockaddress");
5328
5329 // Upgrade any intrinsic calls that slipped through (should not happen!) and
5330 // delete the old functions to clean up. We can't do this unless the entire
5331 // module is materialized because there could always be another function body
5332 // with calls to the old function.
5333 for (auto &I : UpgradedIntrinsics) {
5334 for (auto *U : I.first->users()) {
5335 if (CallInst *CI = dyn_cast<CallInst>(U))
5336 UpgradeIntrinsicCall(CI, I.second);
5337 }
5338 if (!I.first->use_empty())
5339 I.first->replaceAllUsesWith(I.second);
5340 I.first->eraseFromParent();
5341 }
5342 UpgradedIntrinsics.clear();
5343 // Do the same for remangled intrinsics
5344 for (auto &I : RemangledIntrinsics) {
5345 I.first->replaceAllUsesWith(I.second);
5346 I.first->eraseFromParent();
5347 }
5348 RemangledIntrinsics.clear();
5349
5350 UpgradeDebugInfo(*TheModule);
5351
5352 UpgradeModuleFlags(*TheModule);
5353
5354 UpgradeARCRuntime(*TheModule);
5355
5356 return Error::success();
5357}
5358
5359std::vector<StructType *> BitcodeReader::getIdentifiedStructTypes() const {
5360 return IdentifiedStructTypes;
5361}
5362
5363ModuleSummaryIndexBitcodeReader::ModuleSummaryIndexBitcodeReader(
5364 BitstreamCursor Cursor, StringRef Strtab, ModuleSummaryIndex &TheIndex,
5365 StringRef ModulePath, unsigned ModuleId)
5366 : BitcodeReaderBase(std::move(Cursor), Strtab), TheIndex(TheIndex),
5367 ModulePath(ModulePath), ModuleId(ModuleId) {}
5368
5369void ModuleSummaryIndexBitcodeReader::addThisModule() {
5370 TheIndex.addModule(ModulePath, ModuleId);
5371}
5372
5373ModuleSummaryIndex::ModuleInfo *
5374ModuleSummaryIndexBitcodeReader::getThisModule() {
5375 return TheIndex.getModule(ModulePath);
5376}
5377
5378std::pair<ValueInfo, GlobalValue::GUID>
5379ModuleSummaryIndexBitcodeReader::getValueInfoFromValueId(unsigned ValueId) {
5380 auto VGI = ValueIdToValueInfoMap[ValueId];
5381 assert(VGI.first)((VGI.first) ? static_cast<void> (0) : __assert_fail ("VGI.first"
, "/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 5381, __PRETTY_FUNCTION__))
;
5382 return VGI;
5383}
5384
5385void ModuleSummaryIndexBitcodeReader::setValueGUID(
5386 uint64_t ValueID, StringRef ValueName, GlobalValue::LinkageTypes Linkage,
5387 StringRef SourceFileName) {
5388 std::string GlobalId =
5389 GlobalValue::getGlobalIdentifier(ValueName, Linkage, SourceFileName);
5390 auto ValueGUID = GlobalValue::getGUID(GlobalId);
5391 auto OriginalNameID = ValueGUID;
5392 if (GlobalValue::isLocalLinkage(Linkage))
5393 OriginalNameID = GlobalValue::getGUID(ValueName);
5394 if (PrintSummaryGUIDs)
5395 dbgs() << "GUID " << ValueGUID << "(" << OriginalNameID << ") is "
5396 << ValueName << "\n";
5397
5398 // UseStrtab is false for legacy summary formats and value names are
5399 // created on stack. In that case we save the name in a string saver in
5400 // the index so that the value name can be recorded.
5401 ValueIdToValueInfoMap[ValueID] = std::make_pair(
5402 TheIndex.getOrInsertValueInfo(
5403 ValueGUID,
5404 UseStrtab ? ValueName : TheIndex.saveString(ValueName)),
5405 OriginalNameID);
5406}
5407
5408// Specialized value symbol table parser used when reading module index
5409// blocks where we don't actually create global values. The parsed information
5410// is saved in the bitcode reader for use when later parsing summaries.
5411Error ModuleSummaryIndexBitcodeReader::parseValueSymbolTable(
5412 uint64_t Offset,
5413 DenseMap<unsigned, GlobalValue::LinkageTypes> &ValueIdToLinkageMap) {
5414 // With a strtab the VST is not required to parse the summary.
5415 if (UseStrtab)
5416 return Error::success();
5417
5418 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-10~++20200112100611+7fa5290d5bd/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 5418, __PRETTY_FUNCTION__))
;
5419 Expected<uint64_t> MaybeCurrentBit = jumpToValueSymbolTable(Offset, Stream);
5420 if (!MaybeCurrentBit)
5421 return MaybeCurrentBit.takeError();
5422 uint64_t CurrentBit = MaybeCurrentBit.get();
5423
5424 if (Error Err = Stream.EnterSubBlock(bitc::VALUE_SYMTAB_BLOCK_ID))
5425 return Err;
5426
5427 SmallVector<uint64_t, 64> Record;
5428
5429 // Read all the records for this value table.
5430 SmallString<128> ValueName;
5431
5432 while (true) {
5433 Expected<BitstreamEntry> MaybeEntry = Stream.advanceSkippingSubblocks();
5434 if (!MaybeEntry)
5435 return MaybeEntry.takeError();
5436 BitstreamEntry Entry = MaybeEntry.get();
5437
5438 switch (Entry.Kind) {
5439 case BitstreamEntry::SubBlock: // Handled for us already.
5440 case BitstreamEntry::Error:
5441 return error("Malformed block");
5442 case BitstreamEntry::EndBlock:
5443 // Done parsing VST, jump back to wherever we came from.
5444 if (Error JumpFailed = Stream.JumpToBit(CurrentBit))
5445 return JumpFailed;
5446 return Error::success();
5447 case BitstreamEntry::Record:
5448 // The interesting case.
5449 break;
5450 }
5451
5452 // Read a record.
5453 Record.clear();
5454 Expected<unsigned> MaybeRecord = Stream.readRecord(Entry.ID, Record);
5455 if (!MaybeRecord)
5456 return MaybeRecord.takeError();
5457 switch (MaybeRecord.get()) {
5458 default: // Default behavior: ignore (e.g. VST_CODE_BBENTRY records).
5459 break;
5460 case bitc::VST_CODE_ENTRY: { // VST_CODE_ENTRY: [valueid, namechar x N]
5461 if (convertToString(Record, 1, ValueName))
5462 return error("Invalid record");
5463 unsigned ValueID = Record[0];
5464 assert(!SourceFileName.empty())((!SourceFileName.empty()) ? static_cast<void> (0) : __assert_fail
("!SourceFileName.empty()", "/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 5464, __PRETTY_FUNCTION__))
;
5465 auto VLI = ValueIdToLinkageMap.find(ValueID);
5466 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-10~++20200112100611+7fa5290d5bd/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 5467, __PRETTY_FUNCTION__))
5467 "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-10~++20200112100611+7fa5290d5bd/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 5467, __PRETTY_FUNCTION__))
;
5468 auto Linkage = VLI->second;
5469 setValueGUID(ValueID, ValueName, Linkage, SourceFileName);
5470 ValueName.clear();
5471 break;
5472 }
5473 case bitc::VST_CODE_FNENTRY: {
5474 // VST_CODE_FNENTRY: [valueid, offset, namechar x N]
5475 if (convertToString(Record, 2, ValueName))
5476 return error("Invalid record");
5477 unsigned ValueID = Record[0];
5478 assert(!SourceFileName.empty())((!SourceFileName.empty()) ? static_cast<void> (0) : __assert_fail
("!SourceFileName.empty()", "/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 5478, __PRETTY_FUNCTION__))
;
5479 auto VLI = ValueIdToLinkageMap.find(ValueID);
5480 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-10~++20200112100611+7fa5290d5bd/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 5481, __PRETTY_FUNCTION__))
5481 "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-10~++20200112100611+7fa5290d5bd/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 5481, __PRETTY_FUNCTION__))
;
5482 auto Linkage = VLI->second;
5483 setValueGUID(ValueID, ValueName, Linkage, SourceFileName);
5484 ValueName.clear();
5485 break;
5486 }
5487 case bitc::VST_CODE_COMBINED_ENTRY: {
5488 // VST_CODE_COMBINED_ENTRY: [valueid, refguid]
5489 unsigned ValueID = Record[0];
5490 GlobalValue::GUID RefGUID = Record[1];
5491 // The "original name", which is the second value of the pair will be
5492 // overriden later by a FS_COMBINED_ORIGINAL_NAME in the combined index.
5493 ValueIdToValueInfoMap[ValueID] =
5494 std::make_pair(TheIndex.getOrInsertValueInfo(RefGUID), RefGUID);
5495 break;
5496 }
5497 }
5498 }
5499}
5500
5501// Parse just the blocks needed for building the index out of the module.
5502// At the end of this routine the module Index is populated with a map
5503// from global value id to GlobalValueSummary objects.
5504Error ModuleSummaryIndexBitcodeReader::parseModule() {
5505 if (Error Err = Stream.EnterSubBlock(bitc::MODULE_BLOCK_ID))
5506 return Err;
5507
5508 SmallVector<uint64_t, 64> Record;
5509 DenseMap<unsigned, GlobalValue::LinkageTypes> ValueIdToLinkageMap;
5510 unsigned ValueId = 0;
5511
5512 // Read the index for this module.
5513 while (true) {
5514 Expected<llvm::BitstreamEntry> MaybeEntry = Stream.advance();
5515 if (!MaybeEntry)
5516 return MaybeEntry.takeError();
5517 llvm::BitstreamEntry Entry = MaybeEntry.get();
5518
5519 switch (Entry.Kind) {
5520 case BitstreamEntry::Error:
5521 return error("Malformed block");
5522 case BitstreamEntry::EndBlock:
5523 return Error::success();
5524
5525 case BitstreamEntry::SubBlock:
5526 switch (Entry.ID) {
5527 default: // Skip unknown content.
5528 if (Error Err = Stream.SkipBlock())
5529 return Err;
5530 break;
5531 case bitc::BLOCKINFO_BLOCK_ID:
5532 // Need to parse these to get abbrev ids (e.g. for VST)
5533 if (readBlockInfo())
5534 return error("Malformed block");
5535 break;
5536 case bitc::VALUE_SYMTAB_BLOCK_ID:
5537 // Should have been parsed earlier via VSTOffset, unless there
5538 // is no summary section.
5539 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-10~++20200112100611+7fa5290d5bd/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 5541, __PRETTY_FUNCTION__))
5540 !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-10~++20200112100611+7fa5290d5bd/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 5541, __PRETTY_FUNCTION__))
5541 "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-10~++20200112100611+7fa5290d5bd/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 5541, __PRETTY_FUNCTION__))
;
5542 if (Error Err = Stream.SkipBlock())
5543 return Err;
5544 break;
5545 case bitc::GLOBALVAL_SUMMARY_BLOCK_ID:
5546 case bitc::FULL_LTO_GLOBALVAL_SUMMARY_BLOCK_ID:
5547 // Add the module if it is a per-module index (has a source file name).
5548 if (!SourceFileName.empty())
5549 addThisModule();
5550 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-10~++20200112100611+7fa5290d5bd/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 5551, __PRETTY_FUNCTION__))
5551 "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-10~++20200112100611+7fa5290d5bd/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 5551, __PRETTY_FUNCTION__))
;
5552 // We might not have a VST if there were no values in the
5553 // summary. An empty summary block generated when we are
5554 // performing ThinLTO compiles so we don't later invoke
5555 // the regular LTO process on them.
5556 if (VSTOffset > 0) {
5557 if (Error Err = parseValueSymbolTable(VSTOffset, ValueIdToLinkageMap))
5558 return Err;
5559 SeenValueSymbolTable = true;
5560 }
5561 SeenGlobalValSummary = true;
5562 if (Error Err = parseEntireSummary(Entry.ID))
5563 return Err;
5564 break;
5565 case bitc::MODULE_STRTAB_BLOCK_ID:
5566 if (Error Err = parseModuleStringTable())
5567 return Err;
5568 break;
5569 }
5570 continue;
5571
5572 case BitstreamEntry::Record: {
5573 Record.clear();
5574 Expected<unsigned> MaybeBitCode = Stream.readRecord(Entry.ID, Record);
5575 if (!MaybeBitCode)
5576 return MaybeBitCode.takeError();
5577 switch (MaybeBitCode.get()) {
5578 default:
5579 break; // Default behavior, ignore unknown content.
5580 case bitc::MODULE_CODE_VERSION: {
5581 if (Error Err = parseVersionRecord(Record).takeError())
5582 return Err;
5583 break;
5584 }
5585 /// MODULE_CODE_SOURCE_FILENAME: [namechar x N]
5586 case bitc::MODULE_CODE_SOURCE_FILENAME: {
5587 SmallString<128> ValueName;
5588 if (convertToString(Record, 0, ValueName))
5589 return error("Invalid record");
5590 SourceFileName = ValueName.c_str();
5591 break;
5592 }
5593 /// MODULE_CODE_HASH: [5*i32]
5594 case bitc::MODULE_CODE_HASH: {
5595 if (Record.size() != 5)
5596 return error("Invalid hash length " + Twine(Record.size()).str());
5597 auto &Hash = getThisModule()->second.second;
5598 int Pos = 0;
5599 for (auto &Val : Record) {
5600 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-10~++20200112100611+7fa5290d5bd/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 5600, __PRETTY_FUNCTION__))
;
5601 Hash[Pos++] = Val;
5602 }
5603 break;
5604 }
5605 /// MODULE_CODE_VSTOFFSET: [offset]
5606 case bitc::MODULE_CODE_VSTOFFSET:
5607 if (Record.size() < 1)
5608 return error("Invalid record");
5609 // Note that we subtract 1 here because the offset is relative to one
5610 // word before the start of the identification or module block, which
5611 // was historically always the start of the regular bitcode header.
5612 VSTOffset = Record[0] - 1;
5613 break;
5614 // v1 GLOBALVAR: [pointer type, isconst, initid, linkage, ...]
5615 // v1 FUNCTION: [type, callingconv, isproto, linkage, ...]
5616 // v1 ALIAS: [alias type, addrspace, aliasee val#, linkage, ...]
5617 // v2: [strtab offset, strtab size, v1]
5618 case bitc::MODULE_CODE_GLOBALVAR:
5619 case bitc::MODULE_CODE_FUNCTION:
5620 case bitc::MODULE_CODE_ALIAS: {
5621 StringRef Name;
5622 ArrayRef<uint64_t> GVRecord;
5623 std::tie(Name, GVRecord) = readNameFromStrtab(Record);
5624 if (GVRecord.size() <= 3)
5625 return error("Invalid record");
5626 uint64_t RawLinkage = GVRecord[3];
5627 GlobalValue::LinkageTypes Linkage = getDecodedLinkage(RawLinkage);
5628 if (!UseStrtab) {
5629 ValueIdToLinkageMap[ValueId++] = Linkage;
5630 break;
5631 }
5632
5633 setValueGUID(ValueId++, Name, Linkage, SourceFileName);
5634 break;
5635 }
5636 }
5637 }
5638 continue;
5639 }
5640 }
5641}
5642
5643std::vector<ValueInfo>
5644ModuleSummaryIndexBitcodeReader::makeRefList(ArrayRef<uint64_t> Record) {
5645 std::vector<ValueInfo> Ret;
5646 Ret.reserve(Record.size());
5647 for (uint64_t RefValueId : Record)
5648 Ret.push_back(getValueInfoFromValueId(RefValueId).first);
5649 return Ret;
5650}
5651
5652std::vector<FunctionSummary::EdgeTy>
5653ModuleSummaryIndexBitcodeReader::makeCallList(ArrayRef<uint64_t> Record,
5654 bool IsOldProfileFormat,
5655 bool HasProfile, bool HasRelBF) {
5656 std::vector<FunctionSummary::EdgeTy> Ret;
5657 Ret.reserve(Record.size());
5658 for (unsigned I = 0, E = Record.size(); I != E; ++I) {
5659 CalleeInfo::HotnessType Hotness = CalleeInfo::HotnessType::Unknown;
5660 uint64_t RelBF = 0;
5661 ValueInfo Callee = getValueInfoFromValueId(Record[I]).first;
5662 if (IsOldProfileFormat) {
5663 I += 1; // Skip old callsitecount field
5664 if (HasProfile)
5665 I += 1; // Skip old profilecount field
5666 } else if (HasProfile)
5667 Hotness = static_cast<CalleeInfo::HotnessType>(Record[++I]);
5668 else if (HasRelBF)
5669 RelBF = Record[++I];
5670 Ret.push_back(FunctionSummary::EdgeTy{Callee, CalleeInfo(Hotness, RelBF)});
5671 }
5672 return Ret;
5673}
5674
5675static void
5676parseWholeProgramDevirtResolutionByArg(ArrayRef<uint64_t> Record, size_t &Slot,
5677 WholeProgramDevirtResolution &Wpd) {
5678 uint64_t ArgNum = Record[Slot++];
5679 WholeProgramDevirtResolution::ByArg &B =
5680 Wpd.ResByArg[{Record.begin() + Slot, Record.begin() + Slot + ArgNum}];
5681 Slot += ArgNum;
5682
5683 B.TheKind =
5684 static_cast<WholeProgramDevirtResolution::ByArg::Kind>(Record[Slot++]);
5685 B.Info = Record[Slot++];
5686 B.Byte = Record[Slot++];
5687 B.Bit = Record[Slot++];
5688}
5689
5690static void parseWholeProgramDevirtResolution(ArrayRef<uint64_t> Record,
5691 StringRef Strtab, size_t &Slot,
5692 TypeIdSummary &TypeId) {
5693 uint64_t Id = Record[Slot++];
5694 WholeProgramDevirtResolution &Wpd = TypeId.WPDRes[Id];
5695
5696 Wpd.TheKind = static_cast<WholeProgramDevirtResolution::Kind>(Record[Slot++]);
5697 Wpd.SingleImplName = {Strtab.data() + Record[Slot],
5698 static_cast<size_t>(Record[Slot + 1])};
5699 Slot += 2;
5700
5701 uint64_t ResByArgNum = Record[Slot++];
5702 for (uint64_t I = 0; I != ResByArgNum; ++I)
5703 parseWholeProgramDevirtResolutionByArg(Record, Slot, Wpd);
5704}
5705
5706static void parseTypeIdSummaryRecord(ArrayRef<uint64_t> Record,
5707 StringRef Strtab,
5708 ModuleSummaryIndex &TheIndex) {
5709 size_t Slot = 0;
5710 TypeIdSummary &TypeId = TheIndex.getOrInsertTypeIdSummary(
5711 {Strtab.data() + Record[Slot], static_cast<size_t>(Record[Slot + 1])});
5712 Slot += 2;
5713
5714 TypeId.TTRes.TheKind = static_cast<TypeTestResolution::Kind>(Record[Slot++]);
5715 TypeId.TTRes.SizeM1BitWidth = Record[Slot++];
5716 TypeId.TTRes.AlignLog2 = Record[Slot++];
5717 TypeId.TTRes.SizeM1 = Record[Slot++];
5718 TypeId.TTRes.BitMask = Record[Slot++];
5719 TypeId.TTRes.InlineBits = Record[Slot++];
5720
5721 while (Slot < Record.size())
5722 parseWholeProgramDevirtResolution(Record, Strtab, Slot, TypeId);
5723}
5724
5725void ModuleSummaryIndexBitcodeReader::parseTypeIdCompatibleVtableInfo(
5726 ArrayRef<uint64_t> Record, size_t &Slot,
5727 TypeIdCompatibleVtableInfo &TypeId) {
5728 uint64_t Offset = Record[Slot++];
5729 ValueInfo Callee = getValueInfoFromValueId(Record[Slot++]).first;
5730 TypeId.push_back({Offset, Callee});
5731}
5732
5733void ModuleSummaryIndexBitcodeReader::parseTypeIdCompatibleVtableSummaryRecord(
5734 ArrayRef<uint64_t> Record) {
5735 size_t Slot = 0;
5736 TypeIdCompatibleVtableInfo &TypeId =
5737 TheIndex.getOrInsertTypeIdCompatibleVtableSummary(
5738 {Strtab.data() + Record[Slot],
5739 static_cast<size_t>(Record[Slot + 1])});
5740 Slot += 2;
5741
5742 while (Slot < Record.size())
5743 parseTypeIdCompatibleVtableInfo(Record, Slot, TypeId);
5744}
5745
5746static void setSpecialRefs(std::vector<ValueInfo> &Refs, unsigned ROCnt,
5747 unsigned WOCnt) {
5748 // Readonly and writeonly refs are in the end of the refs list.
5749 assert(ROCnt + WOCnt <= Refs.size())((ROCnt + WOCnt <= Refs.size()) ? static_cast<void> (
0) : __assert_fail ("ROCnt + WOCnt <= Refs.size()", "/build/llvm-toolchain-snapshot-10~++20200112100611+7fa5290d5bd/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 5749, __PRETTY_FUNCTION__))
;
5750 unsigned FirstWORef = Refs.size() - WOCnt;
5751 unsigned RefNo = FirstWORef - ROCnt;
5752 for (; RefNo < FirstWORef; ++RefNo)
5753 Refs[RefNo].setReadOnly();
5754 for (; RefNo < Refs.size(); ++RefNo)
5755 Refs[RefNo].setWriteOnly();
5756}
5757
5758// Eagerly parse the entire summary block. This populates the GlobalValueSummary
5759// objects in the index.
5760Error ModuleSummaryIndexBitcodeReader::parseEntireSummary(unsigned ID) {
5761 if (Error Err = Stream.EnterSubBlock(ID))
5762 return Err;
5763 SmallVector<uint64_t, 64> Record;
5764
5765 // Parse version
5766 {
5767 Expected<BitstreamEntry> MaybeEntry = Stream.advanceSkippingSubblocks();
5768 if (!MaybeEntry)
5769 return MaybeEntry.takeError();
5770 BitstreamEntry Entry = MaybeEntry.get();
5771
5772 if (Entry.Kind != BitstreamEntry::Record)
5773 return error("Invalid Summary Block: record for version expected");
5774 Expected<unsigned> MaybeRecord = Stream.readRecord(Entry.ID, Record);
5775 if (!MaybeRecord)
5776 return MaybeRecord.takeError();
5777 if (MaybeRecord.get() != bitc::FS_VERSION)
5778 return error("Invalid Summary Block: version expected");
5779 }
5780 const uint64_t Version = Record[0];
5781 const bool IsOldProfileFormat = Version == 1;
5782 if (Version < 1 || Version > ModuleSummaryIndex::BitcodeSummaryVersion)
5783 return error("Invalid summary version " + Twine(Version) +