Bug Summary

File:llvm/lib/Bitcode/Reader/BitcodeReader.cpp
Warning:line 861, column 26
Method called on moved-from object 'Stream'

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-11/lib/clang/11.0.0 -D _DEBUG -D _GNU_SOURCE -D __STDC_CONSTANT_MACROS -D __STDC_FORMAT_MACROS -D __STDC_LIMIT_MACROS -I /build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/build-llvm/lib/Bitcode/Reader -I /build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/llvm/lib/Bitcode/Reader -I /build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/build-llvm/include -I /build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/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-11/lib/clang/11.0.0/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-11~++20200309111110+2c36c23f347/build-llvm/lib/Bitcode/Reader -fdebug-prefix-map=/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347=. -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-2020-03-09-184146-41876-1 -x c++ /build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/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-11~++20200309111110+2c36c23f347/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-11~++20200309111110+2c36c23f347/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"11.0.0" "')";
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;
656 unsigned ValNo = (unsigned)Record[Slot++];
657 // Adjust the ValNo, if it was encoded relative to the InstNum.
658 if (UseRelativeIDs)
659 ValNo = InstNum - ValNo;
660 if (ValNo < InstNum) {
661 // If this is not a forward reference, just return the value we already
662 // have.
663 ResVal = getFnValueByID(ValNo, nullptr, FullTy);
664 return ResVal == nullptr;
665 }
666 if (Slot == Record.size())
667 return true;
668
669 unsigned TypeNo = (unsigned)Record[Slot++];
670 ResVal = getFnValueByID(ValNo, getTypeByID(TypeNo));
671 if (FullTy)
672 *FullTy = getFullyStructuredTypeByID(TypeNo);
673 return ResVal == nullptr;
674 }
675
676 /// Read a value out of the specified record from slot 'Slot'. Increment Slot
677 /// past the number of slots used by the value in the record. Return true if
678 /// there is an error.
679 bool popValue(SmallVectorImpl<uint64_t> &Record, unsigned &Slot,
680 unsigned InstNum, Type *Ty, Value *&ResVal) {
681 if (getValue(Record, Slot, InstNum, Ty, ResVal))
682 return true;
683 // All values currently take a single record slot.
684 ++Slot;
685 return false;
686 }
687
688 /// Like popValue, but does not increment the Slot number.
689 bool getValue(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),
8
Object 'Stream' is moved
861 ValueList(Context, Stream.SizeInBytes()) {
9
Method called on moved-from object 'Stream'
862 this->ProducerIdentification = std::string(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-11~++20200309111110+2c36c23f347/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-11~++20200309111110+2c36c23f347/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(
989 (RawFlags & 0x1) ? true : false, (RawFlags & 0x2) ? true : false,
990 (RawFlags & 0x4) ? true : false,
991 (GlobalObject::VCallVisibility)(RawFlags >> 3));
992}
993
994static GlobalValue::VisibilityTypes getDecodedVisibility(unsigned Val) {
995 switch (Val) {
996 default: // Map unknown visibilities to default.
997 case 0: return GlobalValue::DefaultVisibility;
998 case 1: return GlobalValue::HiddenVisibility;
999 case 2: return GlobalValue::ProtectedVisibility;
1000 }
1001}
1002
1003static GlobalValue::DLLStorageClassTypes
1004getDecodedDLLStorageClass(unsigned Val) {
1005 switch (Val) {
1006 default: // Map unknown values to default.
1007 case 0: return GlobalValue::DefaultStorageClass;
1008 case 1: return GlobalValue::DLLImportStorageClass;
1009 case 2: return GlobalValue::DLLExportStorageClass;
1010 }
1011}
1012
1013static bool getDecodedDSOLocal(unsigned Val) {
1014 switch(Val) {
1015 default: // Map unknown values to preemptable.
1016 case 0: return false;
1017 case 1: return true;
1018 }
1019}
1020
1021static GlobalVariable::ThreadLocalMode getDecodedThreadLocalMode(unsigned Val) {
1022 switch (Val) {
1023 case 0: return GlobalVariable::NotThreadLocal;
1024 default: // Map unknown non-zero value to general dynamic.
1025 case 1: return GlobalVariable::GeneralDynamicTLSModel;
1026 case 2: return GlobalVariable::LocalDynamicTLSModel;
1027 case 3: return GlobalVariable::InitialExecTLSModel;
1028 case 4: return GlobalVariable::LocalExecTLSModel;
1029 }
1030}
1031
1032static GlobalVariable::UnnamedAddr getDecodedUnnamedAddrType(unsigned Val) {
1033 switch (Val) {
1034 default: // Map unknown to UnnamedAddr::None.
1035 case 0: return GlobalVariable::UnnamedAddr::None;
1036 case 1: return GlobalVariable::UnnamedAddr::Global;
1037 case 2: return GlobalVariable::UnnamedAddr::Local;
1038 }
1039}
1040
1041static int getDecodedCastOpcode(unsigned Val) {
1042 switch (Val) {
1043 default: return -1;
1044 case bitc::CAST_TRUNC : return Instruction::Trunc;
1045 case bitc::CAST_ZEXT : return Instruction::ZExt;
1046 case bitc::CAST_SEXT : return Instruction::SExt;
1047 case bitc::CAST_FPTOUI : return Instruction::FPToUI;
1048 case bitc::CAST_FPTOSI : return Instruction::FPToSI;
1049 case bitc::CAST_UITOFP : return Instruction::UIToFP;
1050 case bitc::CAST_SITOFP : return Instruction::SIToFP;
1051 case bitc::CAST_FPTRUNC : return Instruction::FPTrunc;
1052 case bitc::CAST_FPEXT : return Instruction::FPExt;
1053 case bitc::CAST_PTRTOINT: return Instruction::PtrToInt;
1054 case bitc::CAST_INTTOPTR: return Instruction::IntToPtr;
1055 case bitc::CAST_BITCAST : return Instruction::BitCast;
1056 case bitc::CAST_ADDRSPACECAST: return Instruction::AddrSpaceCast;
1057 }
1058}
1059
1060static int getDecodedUnaryOpcode(unsigned Val, Type *Ty) {
1061 bool IsFP = Ty->isFPOrFPVectorTy();
1062 // UnOps are only valid for int/fp or vector of int/fp types
1063 if (!IsFP && !Ty->isIntOrIntVectorTy())
1064 return -1;
1065
1066 switch (Val) {
1067 default:
1068 return -1;
1069 case bitc::UNOP_FNEG:
1070 return IsFP ? Instruction::FNeg : -1;
1071 }
1072}
1073
1074static int getDecodedBinaryOpcode(unsigned Val, Type *Ty) {
1075 bool IsFP = Ty->isFPOrFPVectorTy();
1076 // BinOps are only valid for int/fp or vector of int/fp types
1077 if (!IsFP && !Ty->isIntOrIntVectorTy())
1078 return -1;
1079
1080 switch (Val) {
1081 default:
1082 return -1;
1083 case bitc::BINOP_ADD:
1084 return IsFP ? Instruction::FAdd : Instruction::Add;
1085 case bitc::BINOP_SUB:
1086 return IsFP ? Instruction::FSub : Instruction::Sub;
1087 case bitc::BINOP_MUL:
1088 return IsFP ? Instruction::FMul : Instruction::Mul;
1089 case bitc::BINOP_UDIV:
1090 return IsFP ? -1 : Instruction::UDiv;
1091 case bitc::BINOP_SDIV:
1092 return IsFP ? Instruction::FDiv : Instruction::SDiv;
1093 case bitc::BINOP_UREM:
1094 return IsFP ? -1 : Instruction::URem;
1095 case bitc::BINOP_SREM:
1096 return IsFP ? Instruction::FRem : Instruction::SRem;
1097 case bitc::BINOP_SHL:
1098 return IsFP ? -1 : Instruction::Shl;
1099 case bitc::BINOP_LSHR:
1100 return IsFP ? -1 : Instruction::LShr;
1101 case bitc::BINOP_ASHR:
1102 return IsFP ? -1 : Instruction::AShr;
1103 case bitc::BINOP_AND:
1104 return IsFP ? -1 : Instruction::And;
1105 case bitc::BINOP_OR:
1106 return IsFP ? -1 : Instruction::Or;
1107 case bitc::BINOP_XOR:
1108 return IsFP ? -1 : Instruction::Xor;
1109 }
1110}
1111
1112static AtomicRMWInst::BinOp getDecodedRMWOperation(unsigned Val) {
1113 switch (Val) {
1114 default: return AtomicRMWInst::BAD_BINOP;
1115 case bitc::RMW_XCHG: return AtomicRMWInst::Xchg;
1116 case bitc::RMW_ADD: return AtomicRMWInst::Add;
1117 case bitc::RMW_SUB: return AtomicRMWInst::Sub;
1118 case bitc::RMW_AND: return AtomicRMWInst::And;
1119 case bitc::RMW_NAND: return AtomicRMWInst::Nand;
1120 case bitc::RMW_OR: return AtomicRMWInst::Or;
1121 case bitc::RMW_XOR: return AtomicRMWInst::Xor;
1122 case bitc::RMW_MAX: return AtomicRMWInst::Max;
1123 case bitc::RMW_MIN: return AtomicRMWInst::Min;
1124 case bitc::RMW_UMAX: return AtomicRMWInst::UMax;
1125 case bitc::RMW_UMIN: return AtomicRMWInst::UMin;
1126 case bitc::RMW_FADD: return AtomicRMWInst::FAdd;
1127 case bitc::RMW_FSUB: return AtomicRMWInst::FSub;
1128 }
1129}
1130
1131static AtomicOrdering getDecodedOrdering(unsigned Val) {
1132 switch (Val) {
1133 case bitc::ORDERING_NOTATOMIC: return AtomicOrdering::NotAtomic;
1134 case bitc::ORDERING_UNORDERED: return AtomicOrdering::Unordered;
1135 case bitc::ORDERING_MONOTONIC: return AtomicOrdering::Monotonic;
1136 case bitc::ORDERING_ACQUIRE: return AtomicOrdering::Acquire;
1137 case bitc::ORDERING_RELEASE: return AtomicOrdering::Release;
1138 case bitc::ORDERING_ACQREL: return AtomicOrdering::AcquireRelease;
1139 default: // Map unknown orderings to sequentially-consistent.
1140 case bitc::ORDERING_SEQCST: return AtomicOrdering::SequentiallyConsistent;
1141 }
1142}
1143
1144static Comdat::SelectionKind getDecodedComdatSelectionKind(unsigned Val) {
1145 switch (Val) {
1146 default: // Map unknown selection kinds to any.
1147 case bitc::COMDAT_SELECTION_KIND_ANY:
1148 return Comdat::Any;
1149 case bitc::COMDAT_SELECTION_KIND_EXACT_MATCH:
1150 return Comdat::ExactMatch;
1151 case bitc::COMDAT_SELECTION_KIND_LARGEST:
1152 return Comdat::Largest;
1153 case bitc::COMDAT_SELECTION_KIND_NO_DUPLICATES:
1154 return Comdat::NoDuplicates;
1155 case bitc::COMDAT_SELECTION_KIND_SAME_SIZE:
1156 return Comdat::SameSize;
1157 }
1158}
1159
1160static FastMathFlags getDecodedFastMathFlags(unsigned Val) {
1161 FastMathFlags FMF;
1162 if (0 != (Val & bitc::UnsafeAlgebra))
1163 FMF.setFast();
1164 if (0 != (Val & bitc::AllowReassoc))
1165 FMF.setAllowReassoc();
1166 if (0 != (Val & bitc::NoNaNs))
1167 FMF.setNoNaNs();
1168 if (0 != (Val & bitc::NoInfs))
1169 FMF.setNoInfs();
1170 if (0 != (Val & bitc::NoSignedZeros))
1171 FMF.setNoSignedZeros();
1172 if (0 != (Val & bitc::AllowReciprocal))
1173 FMF.setAllowReciprocal();
1174 if (0 != (Val & bitc::AllowContract))
1175 FMF.setAllowContract(true);
1176 if (0 != (Val & bitc::ApproxFunc))
1177 FMF.setApproxFunc();
1178 return FMF;
1179}
1180
1181static void upgradeDLLImportExportLinkage(GlobalValue *GV, unsigned Val) {
1182 switch (Val) {
1183 case 5: GV->setDLLStorageClass(GlobalValue::DLLImportStorageClass); break;
1184 case 6: GV->setDLLStorageClass(GlobalValue::DLLExportStorageClass); break;
1185 }
1186}
1187
1188Type *BitcodeReader::getFullyStructuredTypeByID(unsigned ID) {
1189 // The type table size is always specified correctly.
1190 if (ID >= TypeList.size())
1191 return nullptr;
1192
1193 if (Type *Ty = TypeList[ID])
1194 return Ty;
1195
1196 // If we have a forward reference, the only possible case is when it is to a
1197 // named struct. Just create a placeholder for now.
1198 return TypeList[ID] = createIdentifiedStructType(Context);
1199}
1200
1201StructType *BitcodeReader::createIdentifiedStructType(LLVMContext &Context,
1202 StringRef Name) {
1203 auto *Ret = StructType::create(Context, Name);
1204 IdentifiedStructTypes.push_back(Ret);
1205 return Ret;
1206}
1207
1208StructType *BitcodeReader::createIdentifiedStructType(LLVMContext &Context) {
1209 auto *Ret = StructType::create(Context);
1210 IdentifiedStructTypes.push_back(Ret);
1211 return Ret;
1212}
1213
1214//===----------------------------------------------------------------------===//
1215// Functions for parsing blocks from the bitcode file
1216//===----------------------------------------------------------------------===//
1217
1218static uint64_t getRawAttributeMask(Attribute::AttrKind Val) {
1219 switch (Val) {
1220 case Attribute::EndAttrKinds:
1221 case Attribute::EmptyKey:
1222 case Attribute::TombstoneKey:
1223 llvm_unreachable("Synthetic enumerators which should never get here")::llvm::llvm_unreachable_internal("Synthetic enumerators which should never get here"
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 1223)
;
1224
1225 case Attribute::None: return 0;
1226 case Attribute::ZExt: return 1 << 0;
1227 case Attribute::SExt: return 1 << 1;
1228 case Attribute::NoReturn: return 1 << 2;
1229 case Attribute::InReg: return 1 << 3;
1230 case Attribute::StructRet: return 1 << 4;
1231 case Attribute::NoUnwind: return 1 << 5;
1232 case Attribute::NoAlias: return 1 << 6;
1233 case Attribute::ByVal: return 1 << 7;
1234 case Attribute::Nest: return 1 << 8;
1235 case Attribute::ReadNone: return 1 << 9;
1236 case Attribute::ReadOnly: return 1 << 10;
1237 case Attribute::NoInline: return 1 << 11;
1238 case Attribute::AlwaysInline: return 1 << 12;
1239 case Attribute::OptimizeForSize: return 1 << 13;
1240 case Attribute::StackProtect: return 1 << 14;
1241 case Attribute::StackProtectReq: return 1 << 15;
1242 case Attribute::Alignment: return 31 << 16;
1243 case Attribute::NoCapture: return 1 << 21;
1244 case Attribute::NoRedZone: return 1 << 22;
1245 case Attribute::NoImplicitFloat: return 1 << 23;
1246 case Attribute::Naked: return 1 << 24;
1247 case Attribute::InlineHint: return 1 << 25;
1248 case Attribute::StackAlignment: return 7 << 26;
1249 case Attribute::ReturnsTwice: return 1 << 29;
1250 case Attribute::UWTable: return 1 << 30;
1251 case Attribute::NonLazyBind: return 1U << 31;
1252 case Attribute::SanitizeAddress: return 1ULL << 32;
1253 case Attribute::MinSize: return 1ULL << 33;
1254 case Attribute::NoDuplicate: return 1ULL << 34;
1255 case Attribute::StackProtectStrong: return 1ULL << 35;
1256 case Attribute::SanitizeThread: return 1ULL << 36;
1257 case Attribute::SanitizeMemory: return 1ULL << 37;
1258 case Attribute::NoBuiltin: return 1ULL << 38;
1259 case Attribute::Returned: return 1ULL << 39;
1260 case Attribute::Cold: return 1ULL << 40;
1261 case Attribute::Builtin: return 1ULL << 41;
1262 case Attribute::OptimizeNone: return 1ULL << 42;
1263 case Attribute::InAlloca: return 1ULL << 43;
1264 case Attribute::NonNull: return 1ULL << 44;
1265 case Attribute::JumpTable: return 1ULL << 45;
1266 case Attribute::Convergent: return 1ULL << 46;
1267 case Attribute::SafeStack: return 1ULL << 47;
1268 case Attribute::NoRecurse: return 1ULL << 48;
1269 case Attribute::InaccessibleMemOnly: return 1ULL << 49;
1270 case Attribute::InaccessibleMemOrArgMemOnly: return 1ULL << 50;
1271 case Attribute::SwiftSelf: return 1ULL << 51;
1272 case Attribute::SwiftError: return 1ULL << 52;
1273 case Attribute::WriteOnly: return 1ULL << 53;
1274 case Attribute::Speculatable: return 1ULL << 54;
1275 case Attribute::StrictFP: return 1ULL << 55;
1276 case Attribute::SanitizeHWAddress: return 1ULL << 56;
1277 case Attribute::NoCfCheck: return 1ULL << 57;
1278 case Attribute::OptForFuzzing: return 1ULL << 58;
1279 case Attribute::ShadowCallStack: return 1ULL << 59;
1280 case Attribute::SpeculativeLoadHardening:
1281 return 1ULL << 60;
1282 case Attribute::ImmArg:
1283 return 1ULL << 61;
1284 case Attribute::WillReturn:
1285 return 1ULL << 62;
1286 case Attribute::NoFree:
1287 return 1ULL << 63;
1288 case Attribute::NoSync:
1289 llvm_unreachable("nosync attribute not supported in raw format")::llvm::llvm_unreachable_internal("nosync attribute not supported in raw format"
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 1289)
;
1290 break;
1291 case Attribute::Dereferenceable:
1292 llvm_unreachable("dereferenceable attribute not supported in raw format")::llvm::llvm_unreachable_internal("dereferenceable attribute not supported in raw format"
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 1292)
;
1293 break;
1294 case Attribute::DereferenceableOrNull:
1295 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-11~++20200309111110+2c36c23f347/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 1296)
1296 "format")::llvm::llvm_unreachable_internal("dereferenceable_or_null attribute not supported in raw "
"format", "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 1296)
;
1297 break;
1298 case Attribute::ArgMemOnly:
1299 llvm_unreachable("argmemonly attribute not supported in raw format")::llvm::llvm_unreachable_internal("argmemonly attribute not supported in raw format"
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 1299)
;
1300 break;
1301 case Attribute::AllocSize:
1302 llvm_unreachable("allocsize not supported in raw format")::llvm::llvm_unreachable_internal("allocsize not supported in raw format"
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 1302)
;
1303 break;
1304 case Attribute::SanitizeMemTag:
1305 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-11~++20200309111110+2c36c23f347/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 1305)
;
1306 break;
1307 }
1308 llvm_unreachable("Unsupported attribute type")::llvm::llvm_unreachable_internal("Unsupported attribute type"
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 1308)
;
1309}
1310
1311static void addRawAttributeValue(AttrBuilder &B, uint64_t Val) {
1312 if (!Val) return;
1313
1314 for (Attribute::AttrKind I = Attribute::None; I != Attribute::EndAttrKinds;
1315 I = Attribute::AttrKind(I + 1)) {
1316 if (I == Attribute::SanitizeMemTag ||
1317 I == Attribute::Dereferenceable ||
1318 I == Attribute::DereferenceableOrNull ||
1319 I == Attribute::ArgMemOnly ||
1320 I == Attribute::AllocSize ||
1321 I == Attribute::NoSync)
1322 continue;
1323 if (uint64_t A = (Val & getRawAttributeMask(I))) {
1324 if (I == Attribute::Alignment)
1325 B.addAlignmentAttr(1ULL << ((A >> 16) - 1));
1326 else if (I == Attribute::StackAlignment)
1327 B.addStackAlignmentAttr(1ULL << ((A >> 26)-1));
1328 else
1329 B.addAttribute(I);
1330 }
1331 }
1332}
1333
1334/// This fills an AttrBuilder object with the LLVM attributes that have
1335/// been decoded from the given integer. This function must stay in sync with
1336/// 'encodeLLVMAttributesForBitcode'.
1337static void decodeLLVMAttributesForBitcode(AttrBuilder &B,
1338 uint64_t EncodedAttrs) {
1339 // FIXME: Remove in 4.0.
1340
1341 // The alignment is stored as a 16-bit raw value from bits 31--16. We shift
1342 // the bits above 31 down by 11 bits.
1343 unsigned Alignment = (EncodedAttrs & (0xffffULL << 16)) >> 16;
1344 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-11~++20200309111110+2c36c23f347/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 1345, __PRETTY_FUNCTION__))
1345 "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-11~++20200309111110+2c36c23f347/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 1345, __PRETTY_FUNCTION__))
;
1346
1347 if (Alignment)
1348 B.addAlignmentAttr(Alignment);
1349 addRawAttributeValue(B, ((EncodedAttrs & (0xfffffULL << 32)) >> 11) |
1350 (EncodedAttrs & 0xffff));
1351}
1352
1353Error BitcodeReader::parseAttributeBlock() {
1354 if (Error Err = Stream.EnterSubBlock(bitc::PARAMATTR_BLOCK_ID))
1355 return Err;
1356
1357 if (!MAttributes.empty())
1358 return error("Invalid multiple blocks");
1359
1360 SmallVector<uint64_t, 64> Record;
1361
1362 SmallVector<AttributeList, 8> Attrs;
1363
1364 // Read all the records.
1365 while (true) {
1366 Expected<BitstreamEntry> MaybeEntry = Stream.advanceSkippingSubblocks();
1367 if (!MaybeEntry)
1368 return MaybeEntry.takeError();
1369 BitstreamEntry Entry = MaybeEntry.get();
1370
1371 switch (Entry.Kind) {
1372 case BitstreamEntry::SubBlock: // Handled for us already.
1373 case BitstreamEntry::Error:
1374 return error("Malformed block");
1375 case BitstreamEntry::EndBlock:
1376 return Error::success();
1377 case BitstreamEntry::Record:
1378 // The interesting case.
1379 break;
1380 }
1381
1382 // Read a record.
1383 Record.clear();
1384 Expected<unsigned> MaybeRecord = Stream.readRecord(Entry.ID, Record);
1385 if (!MaybeRecord)
1386 return MaybeRecord.takeError();
1387 switch (MaybeRecord.get()) {
1388 default: // Default behavior: ignore.
1389 break;
1390 case bitc::PARAMATTR_CODE_ENTRY_OLD: // ENTRY: [paramidx0, attr0, ...]
1391 // FIXME: Remove in 4.0.
1392 if (Record.size() & 1)
1393 return error("Invalid record");
1394
1395 for (unsigned i = 0, e = Record.size(); i != e; i += 2) {
1396 AttrBuilder B;
1397 decodeLLVMAttributesForBitcode(B, Record[i+1]);
1398 Attrs.push_back(AttributeList::get(Context, Record[i], B));
1399 }
1400
1401 MAttributes.push_back(AttributeList::get(Context, Attrs));
1402 Attrs.clear();
1403 break;
1404 case bitc::PARAMATTR_CODE_ENTRY: // ENTRY: [attrgrp0, attrgrp1, ...]
1405 for (unsigned i = 0, e = Record.size(); i != e; ++i)
1406 Attrs.push_back(MAttributeGroups[Record[i]]);
1407
1408 MAttributes.push_back(AttributeList::get(Context, Attrs));
1409 Attrs.clear();
1410 break;
1411 }
1412 }
1413}
1414
1415// Returns Attribute::None on unrecognized codes.
1416static Attribute::AttrKind getAttrFromCode(uint64_t Code) {
1417 switch (Code) {
1418 default:
1419 return Attribute::None;
1420 case bitc::ATTR_KIND_ALIGNMENT:
1421 return Attribute::Alignment;
1422 case bitc::ATTR_KIND_ALWAYS_INLINE:
1423 return Attribute::AlwaysInline;
1424 case bitc::ATTR_KIND_ARGMEMONLY:
1425 return Attribute::ArgMemOnly;
1426 case bitc::ATTR_KIND_BUILTIN:
1427 return Attribute::Builtin;
1428 case bitc::ATTR_KIND_BY_VAL:
1429 return Attribute::ByVal;
1430 case bitc::ATTR_KIND_IN_ALLOCA:
1431 return Attribute::InAlloca;
1432 case bitc::ATTR_KIND_COLD:
1433 return Attribute::Cold;
1434 case bitc::ATTR_KIND_CONVERGENT:
1435 return Attribute::Convergent;
1436 case bitc::ATTR_KIND_INACCESSIBLEMEM_ONLY:
1437 return Attribute::InaccessibleMemOnly;
1438 case bitc::ATTR_KIND_INACCESSIBLEMEM_OR_ARGMEMONLY:
1439 return Attribute::InaccessibleMemOrArgMemOnly;
1440 case bitc::ATTR_KIND_INLINE_HINT:
1441 return Attribute::InlineHint;
1442 case bitc::ATTR_KIND_IN_REG:
1443 return Attribute::InReg;
1444 case bitc::ATTR_KIND_JUMP_TABLE:
1445 return Attribute::JumpTable;
1446 case bitc::ATTR_KIND_MIN_SIZE:
1447 return Attribute::MinSize;
1448 case bitc::ATTR_KIND_NAKED:
1449 return Attribute::Naked;
1450 case bitc::ATTR_KIND_NEST:
1451 return Attribute::Nest;
1452 case bitc::ATTR_KIND_NO_ALIAS:
1453 return Attribute::NoAlias;
1454 case bitc::ATTR_KIND_NO_BUILTIN:
1455 return Attribute::NoBuiltin;
1456 case bitc::ATTR_KIND_NO_CAPTURE:
1457 return Attribute::NoCapture;
1458 case bitc::ATTR_KIND_NO_DUPLICATE:
1459 return Attribute::NoDuplicate;
1460 case bitc::ATTR_KIND_NOFREE:
1461 return Attribute::NoFree;
1462 case bitc::ATTR_KIND_NO_IMPLICIT_FLOAT:
1463 return Attribute::NoImplicitFloat;
1464 case bitc::ATTR_KIND_NO_INLINE:
1465 return Attribute::NoInline;
1466 case bitc::ATTR_KIND_NO_RECURSE:
1467 return Attribute::NoRecurse;
1468 case bitc::ATTR_KIND_NON_LAZY_BIND:
1469 return Attribute::NonLazyBind;
1470 case bitc::ATTR_KIND_NON_NULL:
1471 return Attribute::NonNull;
1472 case bitc::ATTR_KIND_DEREFERENCEABLE:
1473 return Attribute::Dereferenceable;
1474 case bitc::ATTR_KIND_DEREFERENCEABLE_OR_NULL:
1475 return Attribute::DereferenceableOrNull;
1476 case bitc::ATTR_KIND_ALLOC_SIZE:
1477 return Attribute::AllocSize;
1478 case bitc::ATTR_KIND_NO_RED_ZONE:
1479 return Attribute::NoRedZone;
1480 case bitc::ATTR_KIND_NO_RETURN:
1481 return Attribute::NoReturn;
1482 case bitc::ATTR_KIND_NOSYNC:
1483 return Attribute::NoSync;
1484 case bitc::ATTR_KIND_NOCF_CHECK:
1485 return Attribute::NoCfCheck;
1486 case bitc::ATTR_KIND_NO_UNWIND:
1487 return Attribute::NoUnwind;
1488 case bitc::ATTR_KIND_OPT_FOR_FUZZING:
1489 return Attribute::OptForFuzzing;
1490 case bitc::ATTR_KIND_OPTIMIZE_FOR_SIZE:
1491 return Attribute::OptimizeForSize;
1492 case bitc::ATTR_KIND_OPTIMIZE_NONE:
1493 return Attribute::OptimizeNone;
1494 case bitc::ATTR_KIND_READ_NONE:
1495 return Attribute::ReadNone;
1496 case bitc::ATTR_KIND_READ_ONLY:
1497 return Attribute::ReadOnly;
1498 case bitc::ATTR_KIND_RETURNED:
1499 return Attribute::Returned;
1500 case bitc::ATTR_KIND_RETURNS_TWICE:
1501 return Attribute::ReturnsTwice;
1502 case bitc::ATTR_KIND_S_EXT:
1503 return Attribute::SExt;
1504 case bitc::ATTR_KIND_SPECULATABLE:
1505 return Attribute::Speculatable;
1506 case bitc::ATTR_KIND_STACK_ALIGNMENT:
1507 return Attribute::StackAlignment;
1508 case bitc::ATTR_KIND_STACK_PROTECT:
1509 return Attribute::StackProtect;
1510 case bitc::ATTR_KIND_STACK_PROTECT_REQ:
1511 return Attribute::StackProtectReq;
1512 case bitc::ATTR_KIND_STACK_PROTECT_STRONG:
1513 return Attribute::StackProtectStrong;
1514 case bitc::ATTR_KIND_SAFESTACK:
1515 return Attribute::SafeStack;
1516 case bitc::ATTR_KIND_SHADOWCALLSTACK:
1517 return Attribute::ShadowCallStack;
1518 case bitc::ATTR_KIND_STRICT_FP:
1519 return Attribute::StrictFP;
1520 case bitc::ATTR_KIND_STRUCT_RET:
1521 return Attribute::StructRet;
1522 case bitc::ATTR_KIND_SANITIZE_ADDRESS:
1523 return Attribute::SanitizeAddress;
1524 case bitc::ATTR_KIND_SANITIZE_HWADDRESS:
1525 return Attribute::SanitizeHWAddress;
1526 case bitc::ATTR_KIND_SANITIZE_THREAD:
1527 return Attribute::SanitizeThread;
1528 case bitc::ATTR_KIND_SANITIZE_MEMORY:
1529 return Attribute::SanitizeMemory;
1530 case bitc::ATTR_KIND_SPECULATIVE_LOAD_HARDENING:
1531 return Attribute::SpeculativeLoadHardening;
1532 case bitc::ATTR_KIND_SWIFT_ERROR:
1533 return Attribute::SwiftError;
1534 case bitc::ATTR_KIND_SWIFT_SELF:
1535 return Attribute::SwiftSelf;
1536 case bitc::ATTR_KIND_UW_TABLE:
1537 return Attribute::UWTable;
1538 case bitc::ATTR_KIND_WILLRETURN:
1539 return Attribute::WillReturn;
1540 case bitc::ATTR_KIND_WRITEONLY:
1541 return Attribute::WriteOnly;
1542 case bitc::ATTR_KIND_Z_EXT:
1543 return Attribute::ZExt;
1544 case bitc::ATTR_KIND_IMMARG:
1545 return Attribute::ImmArg;
1546 case bitc::ATTR_KIND_SANITIZE_MEMTAG:
1547 return Attribute::SanitizeMemTag;
1548 }
1549}
1550
1551Error BitcodeReader::parseAlignmentValue(uint64_t Exponent,
1552 MaybeAlign &Alignment) {
1553 // Note: Alignment in bitcode files is incremented by 1, so that zero
1554 // can be used for default alignment.
1555 if (Exponent > Value::MaxAlignmentExponent + 1)
1556 return error("Invalid alignment value");
1557 Alignment = decodeMaybeAlign(Exponent);
1558 return Error::success();
1559}
1560
1561Error BitcodeReader::parseAttrKind(uint64_t Code, Attribute::AttrKind *Kind) {
1562 *Kind = getAttrFromCode(Code);
1563 if (*Kind == Attribute::None)
1564 return error("Unknown attribute kind (" + Twine(Code) + ")");
1565 return Error::success();
1566}
1567
1568Error BitcodeReader::parseAttributeGroupBlock() {
1569 if (Error Err = Stream.EnterSubBlock(bitc::PARAMATTR_GROUP_BLOCK_ID))
1570 return Err;
1571
1572 if (!MAttributeGroups.empty())
1573 return error("Invalid multiple blocks");
1574
1575 SmallVector<uint64_t, 64> Record;
1576
1577 // Read all the records.
1578 while (true) {
1579 Expected<BitstreamEntry> MaybeEntry = Stream.advanceSkippingSubblocks();
1580 if (!MaybeEntry)
1581 return MaybeEntry.takeError();
1582 BitstreamEntry Entry = MaybeEntry.get();
1583
1584 switch (Entry.Kind) {
1585 case BitstreamEntry::SubBlock: // Handled for us already.
1586 case BitstreamEntry::Error:
1587 return error("Malformed block");
1588 case BitstreamEntry::EndBlock:
1589 return Error::success();
1590 case BitstreamEntry::Record:
1591 // The interesting case.
1592 break;
1593 }
1594
1595 // Read a record.
1596 Record.clear();
1597 Expected<unsigned> MaybeRecord = Stream.readRecord(Entry.ID, Record);
1598 if (!MaybeRecord)
1599 return MaybeRecord.takeError();
1600 switch (MaybeRecord.get()) {
1601 default: // Default behavior: ignore.
1602 break;
1603 case bitc::PARAMATTR_GRP_CODE_ENTRY: { // ENTRY: [grpid, idx, a0, a1, ...]
1604 if (Record.size() < 3)
1605 return error("Invalid record");
1606
1607 uint64_t GrpID = Record[0];
1608 uint64_t Idx = Record[1]; // Index of the object this attribute refers to.
1609
1610 AttrBuilder B;
1611 for (unsigned i = 2, e = Record.size(); i != e; ++i) {
1612 if (Record[i] == 0) { // Enum attribute
1613 Attribute::AttrKind Kind;
1614 if (Error Err = parseAttrKind(Record[++i], &Kind))
1615 return Err;
1616
1617 // Upgrade old-style byval attribute to one with a type, even if it's
1618 // nullptr. We will have to insert the real type when we associate
1619 // this AttributeList with a function.
1620 if (Kind == Attribute::ByVal)
1621 B.addByValAttr(nullptr);
1622
1623 B.addAttribute(Kind);
1624 } else if (Record[i] == 1) { // Integer attribute
1625 Attribute::AttrKind Kind;
1626 if (Error Err = parseAttrKind(Record[++i], &Kind))
1627 return Err;
1628 if (Kind == Attribute::Alignment)
1629 B.addAlignmentAttr(Record[++i]);
1630 else if (Kind == Attribute::StackAlignment)
1631 B.addStackAlignmentAttr(Record[++i]);
1632 else if (Kind == Attribute::Dereferenceable)
1633 B.addDereferenceableAttr(Record[++i]);
1634 else if (Kind == Attribute::DereferenceableOrNull)
1635 B.addDereferenceableOrNullAttr(Record[++i]);
1636 else if (Kind == Attribute::AllocSize)
1637 B.addAllocSizeAttrFromRawRepr(Record[++i]);
1638 } else if (Record[i] == 3 || Record[i] == 4) { // String attribute
1639 bool HasValue = (Record[i++] == 4);
1640 SmallString<64> KindStr;
1641 SmallString<64> ValStr;
1642
1643 while (Record[i] != 0 && i != e)
1644 KindStr += Record[i++];
1645 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-11~++20200309111110+2c36c23f347/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 1645, __PRETTY_FUNCTION__))
;
1646
1647 if (HasValue) {
1648 // Has a value associated with it.
1649 ++i; // Skip the '0' that terminates the "kind" string.
1650 while (Record[i] != 0 && i != e)
1651 ValStr += Record[i++];
1652 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-11~++20200309111110+2c36c23f347/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 1652, __PRETTY_FUNCTION__))
;
1653 }
1654
1655 B.addAttribute(KindStr.str(), ValStr.str());
1656 } else {
1657 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-11~++20200309111110+2c36c23f347/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 1658, __PRETTY_FUNCTION__))
1658 "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-11~++20200309111110+2c36c23f347/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 1658, __PRETTY_FUNCTION__))
;
1659 bool HasType = Record[i] == 6;
1660 Attribute::AttrKind Kind;
1661 if (Error Err = parseAttrKind(Record[++i], &Kind))
1662 return Err;
1663 if (Kind == Attribute::ByVal)
1664 B.addByValAttr(HasType ? getTypeByID(Record[++i]) : nullptr);
1665 }
1666 }
1667
1668 UpgradeFramePointerAttributes(B);
1669 MAttributeGroups[GrpID] = AttributeList::get(Context, Idx, B);
1670 break;
1671 }
1672 }
1673 }
1674}
1675
1676Error BitcodeReader::parseTypeTable() {
1677 if (Error Err = Stream.EnterSubBlock(bitc::TYPE_BLOCK_ID_NEW))
1678 return Err;
1679
1680 return parseTypeTableBody();
1681}
1682
1683Error BitcodeReader::parseTypeTableBody() {
1684 if (!TypeList.empty())
1685 return error("Invalid multiple blocks");
1686
1687 SmallVector<uint64_t, 64> Record;
1688 unsigned NumRecords = 0;
1689
1690 SmallString<64> TypeName;
1691
1692 // Read all the records for this type table.
1693 while (true) {
1694 Expected<BitstreamEntry> MaybeEntry = Stream.advanceSkippingSubblocks();
1695 if (!MaybeEntry)
1696 return MaybeEntry.takeError();
1697 BitstreamEntry Entry = MaybeEntry.get();
1698
1699 switch (Entry.Kind) {
1700 case BitstreamEntry::SubBlock: // Handled for us already.
1701 case BitstreamEntry::Error:
1702 return error("Malformed block");
1703 case BitstreamEntry::EndBlock:
1704 if (NumRecords != TypeList.size())
1705 return error("Malformed block");
1706 return Error::success();
1707 case BitstreamEntry::Record:
1708 // The interesting case.
1709 break;
1710 }
1711
1712 // Read a record.
1713 Record.clear();
1714 Type *ResultTy = nullptr;
1715 Expected<unsigned> MaybeRecord = Stream.readRecord(Entry.ID, Record);
1716 if (!MaybeRecord)
1717 return MaybeRecord.takeError();
1718 switch (MaybeRecord.get()) {
1719 default:
1720 return error("Invalid value");
1721 case bitc::TYPE_CODE_NUMENTRY: // TYPE_CODE_NUMENTRY: [numentries]
1722 // TYPE_CODE_NUMENTRY contains a count of the number of types in the
1723 // type list. This allows us to reserve space.
1724 if (Record.size() < 1)
1725 return error("Invalid record");
1726 TypeList.resize(Record[0]);
1727 continue;
1728 case bitc::TYPE_CODE_VOID: // VOID
1729 ResultTy = Type::getVoidTy(Context);
1730 break;
1731 case bitc::TYPE_CODE_HALF: // HALF
1732 ResultTy = Type::getHalfTy(Context);
1733 break;
1734 case bitc::TYPE_CODE_FLOAT: // FLOAT
1735 ResultTy = Type::getFloatTy(Context);
1736 break;
1737 case bitc::TYPE_CODE_DOUBLE: // DOUBLE
1738 ResultTy = Type::getDoubleTy(Context);
1739 break;
1740 case bitc::TYPE_CODE_X86_FP80: // X86_FP80
1741 ResultTy = Type::getX86_FP80Ty(Context);
1742 break;
1743 case bitc::TYPE_CODE_FP128: // FP128
1744 ResultTy = Type::getFP128Ty(Context);
1745 break;
1746 case bitc::TYPE_CODE_PPC_FP128: // PPC_FP128
1747 ResultTy = Type::getPPC_FP128Ty(Context);
1748 break;
1749 case bitc::TYPE_CODE_LABEL: // LABEL
1750 ResultTy = Type::getLabelTy(Context);
1751 break;
1752 case bitc::TYPE_CODE_METADATA: // METADATA
1753 ResultTy = Type::getMetadataTy(Context);
1754 break;
1755 case bitc::TYPE_CODE_X86_MMX: // X86_MMX
1756 ResultTy = Type::getX86_MMXTy(Context);
1757 break;
1758 case bitc::TYPE_CODE_TOKEN: // TOKEN
1759 ResultTy = Type::getTokenTy(Context);
1760 break;
1761 case bitc::TYPE_CODE_INTEGER: { // INTEGER: [width]
1762 if (Record.size() < 1)
1763 return error("Invalid record");
1764
1765 uint64_t NumBits = Record[0];
1766 if (NumBits < IntegerType::MIN_INT_BITS ||
1767 NumBits > IntegerType::MAX_INT_BITS)
1768 return error("Bitwidth for integer type out of range");
1769 ResultTy = IntegerType::get(Context, NumBits);
1770 break;
1771 }
1772 case bitc::TYPE_CODE_POINTER: { // POINTER: [pointee type] or
1773 // [pointee type, address space]
1774 if (Record.size() < 1)
1775 return error("Invalid record");
1776 unsigned AddressSpace = 0;
1777 if (Record.size() == 2)
1778 AddressSpace = Record[1];
1779 ResultTy = getTypeByID(Record[0]);
1780 if (!ResultTy ||
1781 !PointerType::isValidElementType(ResultTy))
1782 return error("Invalid type");
1783 ResultTy = PointerType::get(ResultTy, AddressSpace);
1784 break;
1785 }
1786 case bitc::TYPE_CODE_FUNCTION_OLD: {
1787 // FIXME: attrid is dead, remove it in LLVM 4.0
1788 // FUNCTION: [vararg, attrid, retty, paramty x N]
1789 if (Record.size() < 3)
1790 return error("Invalid record");
1791 SmallVector<Type*, 8> ArgTys;
1792 for (unsigned i = 3, e = Record.size(); i != e; ++i) {
1793 if (Type *T = getTypeByID(Record[i]))
1794 ArgTys.push_back(T);
1795 else
1796 break;
1797 }
1798
1799 ResultTy = getTypeByID(Record[2]);
1800 if (!ResultTy || ArgTys.size() < Record.size()-3)
1801 return error("Invalid type");
1802
1803 ResultTy = FunctionType::get(ResultTy, ArgTys, Record[0]);
1804 break;
1805 }
1806 case bitc::TYPE_CODE_FUNCTION: {
1807 // FUNCTION: [vararg, retty, paramty x N]
1808 if (Record.size() < 2)
1809 return error("Invalid record");
1810 SmallVector<Type*, 8> ArgTys;
1811 for (unsigned i = 2, e = Record.size(); i != e; ++i) {
1812 if (Type *T = getTypeByID(Record[i])) {
1813 if (!FunctionType::isValidArgumentType(T))
1814 return error("Invalid function argument type");
1815 ArgTys.push_back(T);
1816 }
1817 else
1818 break;
1819 }
1820
1821 ResultTy = getTypeByID(Record[1]);
1822 if (!ResultTy || ArgTys.size() < Record.size()-2)
1823 return error("Invalid type");
1824
1825 ResultTy = FunctionType::get(ResultTy, ArgTys, Record[0]);
1826 break;
1827 }
1828 case bitc::TYPE_CODE_STRUCT_ANON: { // STRUCT: [ispacked, eltty x N]
1829 if (Record.size() < 1)
1830 return error("Invalid record");
1831 SmallVector<Type*, 8> EltTys;
1832 for (unsigned i = 1, e = Record.size(); i != e; ++i) {
1833 if (Type *T = getTypeByID(Record[i]))
1834 EltTys.push_back(T);
1835 else
1836 break;
1837 }
1838 if (EltTys.size() != Record.size()-1)
1839 return error("Invalid type");
1840 ResultTy = StructType::get(Context, EltTys, Record[0]);
1841 break;
1842 }
1843 case bitc::TYPE_CODE_STRUCT_NAME: // STRUCT_NAME: [strchr x N]
1844 if (convertToString(Record, 0, TypeName))
1845 return error("Invalid record");
1846 continue;
1847
1848 case bitc::TYPE_CODE_STRUCT_NAMED: { // STRUCT: [ispacked, eltty x N]
1849 if (Record.size() < 1)
1850 return error("Invalid record");
1851
1852 if (NumRecords >= TypeList.size())
1853 return error("Invalid TYPE table");
1854
1855 // Check to see if this was forward referenced, if so fill in the temp.
1856 StructType *Res = cast_or_null<StructType>(TypeList[NumRecords]);
1857 if (Res) {
1858 Res->setName(TypeName);
1859 TypeList[NumRecords] = nullptr;
1860 } else // Otherwise, create a new struct.
1861 Res = createIdentifiedStructType(Context, TypeName);
1862 TypeName.clear();
1863
1864 SmallVector<Type*, 8> EltTys;
1865 for (unsigned i = 1, e = Record.size(); i != e; ++i) {
1866 if (Type *T = getTypeByID(Record[i]))
1867 EltTys.push_back(T);
1868 else
1869 break;
1870 }
1871 if (EltTys.size() != Record.size()-1)
1872 return error("Invalid record");
1873 Res->setBody(EltTys, Record[0]);
1874 ResultTy = Res;
1875 break;
1876 }
1877 case bitc::TYPE_CODE_OPAQUE: { // OPAQUE: []
1878 if (Record.size() != 1)
1879 return error("Invalid record");
1880
1881 if (NumRecords >= TypeList.size())
1882 return error("Invalid TYPE table");
1883
1884 // Check to see if this was forward referenced, if so fill in the temp.
1885 StructType *Res = cast_or_null<StructType>(TypeList[NumRecords]);
1886 if (Res) {
1887 Res->setName(TypeName);
1888 TypeList[NumRecords] = nullptr;
1889 } else // Otherwise, create a new struct with no body.
1890 Res = createIdentifiedStructType(Context, TypeName);
1891 TypeName.clear();
1892 ResultTy = Res;
1893 break;
1894 }
1895 case bitc::TYPE_CODE_ARRAY: // ARRAY: [numelts, eltty]
1896 if (Record.size() < 2)
1897 return error("Invalid record");
1898 ResultTy = getTypeByID(Record[1]);
1899 if (!ResultTy || !ArrayType::isValidElementType(ResultTy))
1900 return error("Invalid type");
1901 ResultTy = ArrayType::get(ResultTy, Record[0]);
1902 break;
1903 case bitc::TYPE_CODE_VECTOR: // VECTOR: [numelts, eltty] or
1904 // [numelts, eltty, scalable]
1905 if (Record.size() < 2)
1906 return error("Invalid record");
1907 if (Record[0] == 0)
1908 return error("Invalid vector length");
1909 ResultTy = getTypeByID(Record[1]);
1910 if (!ResultTy || !StructType::isValidElementType(ResultTy))
1911 return error("Invalid type");
1912 bool Scalable = Record.size() > 2 ? Record[2] : false;
1913 ResultTy = VectorType::get(ResultTy, Record[0], Scalable);
1914 break;
1915 }
1916
1917 if (NumRecords >= TypeList.size())
1918 return error("Invalid TYPE table");
1919 if (TypeList[NumRecords])
1920 return error(
1921 "Invalid TYPE table: Only named structs can be forward referenced");
1922 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-11~++20200309111110+2c36c23f347/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 1922, __PRETTY_FUNCTION__))
;
1923 TypeList[NumRecords++] = ResultTy;
1924 }
1925}
1926
1927Error BitcodeReader::parseOperandBundleTags() {
1928 if (Error Err = Stream.EnterSubBlock(bitc::OPERAND_BUNDLE_TAGS_BLOCK_ID))
1929 return Err;
1930
1931 if (!BundleTags.empty())
1932 return error("Invalid multiple blocks");
1933
1934 SmallVector<uint64_t, 64> Record;
1935
1936 while (true) {
1937 Expected<BitstreamEntry> MaybeEntry = Stream.advanceSkippingSubblocks();
1938 if (!MaybeEntry)
1939 return MaybeEntry.takeError();
1940 BitstreamEntry Entry = MaybeEntry.get();
1941
1942 switch (Entry.Kind) {
1943 case BitstreamEntry::SubBlock: // Handled for us already.
1944 case BitstreamEntry::Error:
1945 return error("Malformed block");
1946 case BitstreamEntry::EndBlock:
1947 return Error::success();
1948 case BitstreamEntry::Record:
1949 // The interesting case.
1950 break;
1951 }
1952
1953 // Tags are implicitly mapped to integers by their order.
1954
1955 Expected<unsigned> MaybeRecord = Stream.readRecord(Entry.ID, Record);
1956 if (!MaybeRecord)
1957 return MaybeRecord.takeError();
1958 if (MaybeRecord.get() != bitc::OPERAND_BUNDLE_TAG)
1959 return error("Invalid record");
1960
1961 // OPERAND_BUNDLE_TAG: [strchr x N]
1962 BundleTags.emplace_back();
1963 if (convertToString(Record, 0, BundleTags.back()))
1964 return error("Invalid record");
1965 Record.clear();
1966 }
1967}
1968
1969Error BitcodeReader::parseSyncScopeNames() {
1970 if (Error Err = Stream.EnterSubBlock(bitc::SYNC_SCOPE_NAMES_BLOCK_ID))
1971 return Err;
1972
1973 if (!SSIDs.empty())
1974 return error("Invalid multiple synchronization scope names blocks");
1975
1976 SmallVector<uint64_t, 64> Record;
1977 while (true) {
1978 Expected<BitstreamEntry> MaybeEntry = Stream.advanceSkippingSubblocks();
1979 if (!MaybeEntry)
1980 return MaybeEntry.takeError();
1981 BitstreamEntry Entry = MaybeEntry.get();
1982
1983 switch (Entry.Kind) {
1984 case BitstreamEntry::SubBlock: // Handled for us already.
1985 case BitstreamEntry::Error:
1986 return error("Malformed block");
1987 case BitstreamEntry::EndBlock:
1988 if (SSIDs.empty())
1989 return error("Invalid empty synchronization scope names block");
1990 return Error::success();
1991 case BitstreamEntry::Record:
1992 // The interesting case.
1993 break;
1994 }
1995
1996 // Synchronization scope names are implicitly mapped to synchronization
1997 // scope IDs by their order.
1998
1999 Expected<unsigned> MaybeRecord = Stream.readRecord(Entry.ID, Record);
2000 if (!MaybeRecord)
2001 return MaybeRecord.takeError();
2002 if (MaybeRecord.get() != bitc::SYNC_SCOPE_NAME)
2003 return error("Invalid record");
2004
2005 SmallString<16> SSN;
2006 if (convertToString(Record, 0, SSN))
2007 return error("Invalid record");
2008
2009 SSIDs.push_back(Context.getOrInsertSyncScopeID(SSN));
2010 Record.clear();
2011 }
2012}
2013
2014/// Associate a value with its name from the given index in the provided record.
2015Expected<Value *> BitcodeReader::recordValue(SmallVectorImpl<uint64_t> &Record,
2016 unsigned NameIndex, Triple &TT) {
2017 SmallString<128> ValueName;
2018 if (convertToString(Record, NameIndex, ValueName))
2019 return error("Invalid record");
2020 unsigned ValueID = Record[0];
2021 if (ValueID >= ValueList.size() || !ValueList[ValueID])
2022 return error("Invalid record");
2023 Value *V = ValueList[ValueID];
2024
2025 StringRef NameStr(ValueName.data(), ValueName.size());
2026 if (NameStr.find_first_of(0) != StringRef::npos)
2027 return error("Invalid value name");
2028 V->setName(NameStr);
2029 auto *GO = dyn_cast<GlobalObject>(V);
2030 if (GO) {
2031 if (GO->getComdat() == reinterpret_cast<Comdat *>(1)) {
2032 if (TT.supportsCOMDAT())
2033 GO->setComdat(TheModule->getOrInsertComdat(V->getName()));
2034 else
2035 GO->setComdat(nullptr);
2036 }
2037 }
2038 return V;
2039}
2040
2041/// Helper to note and return the current location, and jump to the given
2042/// offset.
2043static Expected<uint64_t> jumpToValueSymbolTable(uint64_t Offset,
2044 BitstreamCursor &Stream) {
2045 // Save the current parsing location so we can jump back at the end
2046 // of the VST read.
2047 uint64_t CurrentBit = Stream.GetCurrentBitNo();
2048 if (Error JumpFailed = Stream.JumpToBit(Offset * 32))
2049 return std::move(JumpFailed);
2050 Expected<BitstreamEntry> MaybeEntry = Stream.advance();
2051 if (!MaybeEntry)
2052 return MaybeEntry.takeError();
2053 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-11~++20200309111110+2c36c23f347/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 2053, __PRETTY_FUNCTION__))
;
2054 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-11~++20200309111110+2c36c23f347/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 2054, __PRETTY_FUNCTION__))
;
2055 return CurrentBit;
2056}
2057
2058void BitcodeReader::setDeferredFunctionInfo(unsigned FuncBitcodeOffsetDelta,
2059 Function *F,
2060 ArrayRef<uint64_t> Record) {
2061 // Note that we subtract 1 here because the offset is relative to one word
2062 // before the start of the identification or module block, which was
2063 // historically always the start of the regular bitcode header.
2064 uint64_t FuncWordOffset = Record[1] - 1;
2065 uint64_t FuncBitOffset = FuncWordOffset * 32;
2066 DeferredFunctionInfo[F] = FuncBitOffset + FuncBitcodeOffsetDelta;
2067 // Set the LastFunctionBlockBit to point to the last function block.
2068 // Later when parsing is resumed after function materialization,
2069 // we can simply skip that last function block.
2070 if (FuncBitOffset > LastFunctionBlockBit)
2071 LastFunctionBlockBit = FuncBitOffset;
2072}
2073
2074/// Read a new-style GlobalValue symbol table.
2075Error BitcodeReader::parseGlobalValueSymbolTable() {
2076 unsigned FuncBitcodeOffsetDelta =
2077 Stream.getAbbrevIDWidth() + bitc::BlockIDWidth;
2078
2079 if (Error Err = Stream.EnterSubBlock(bitc::VALUE_SYMTAB_BLOCK_ID))
2080 return Err;
2081
2082 SmallVector<uint64_t, 64> Record;
2083 while (true) {
2084 Expected<BitstreamEntry> MaybeEntry = Stream.advanceSkippingSubblocks();
2085 if (!MaybeEntry)
2086 return MaybeEntry.takeError();
2087 BitstreamEntry Entry = MaybeEntry.get();
2088
2089 switch (Entry.Kind) {
2090 case BitstreamEntry::SubBlock:
2091 case BitstreamEntry::Error:
2092 return error("Malformed block");
2093 case BitstreamEntry::EndBlock:
2094 return Error::success();
2095 case BitstreamEntry::Record:
2096 break;
2097 }
2098
2099 Record.clear();
2100 Expected<unsigned> MaybeRecord = Stream.readRecord(Entry.ID, Record);
2101 if (!MaybeRecord)
2102 return MaybeRecord.takeError();
2103 switch (MaybeRecord.get()) {
2104 case bitc::VST_CODE_FNENTRY: // [valueid, offset]
2105 setDeferredFunctionInfo(FuncBitcodeOffsetDelta,
2106 cast<Function>(ValueList[Record[0]]), Record);
2107 break;
2108 }
2109 }
2110}
2111
2112/// Parse the value symbol table at either the current parsing location or
2113/// at the given bit offset if provided.
2114Error BitcodeReader::parseValueSymbolTable(uint64_t Offset) {
2115 uint64_t CurrentBit;
2116 // Pass in the Offset to distinguish between calling for the module-level
2117 // VST (where we want to jump to the VST offset) and the function-level
2118 // VST (where we don't).
2119 if (Offset > 0) {
2120 Expected<uint64_t> MaybeCurrentBit = jumpToValueSymbolTable(Offset, Stream);
2121 if (!MaybeCurrentBit)
2122 return MaybeCurrentBit.takeError();
2123 CurrentBit = MaybeCurrentBit.get();
2124 // If this module uses a string table, read this as a module-level VST.
2125 if (UseStrtab) {
2126 if (Error Err = parseGlobalValueSymbolTable())
2127 return Err;
2128 if (Error JumpFailed = Stream.JumpToBit(CurrentBit))
2129 return JumpFailed;
2130 return Error::success();
2131 }
2132 // Otherwise, the VST will be in a similar format to a function-level VST,
2133 // and will contain symbol names.
2134 }
2135
2136 // Compute the delta between the bitcode indices in the VST (the word offset
2137 // to the word-aligned ENTER_SUBBLOCK for the function block, and that
2138 // expected by the lazy reader. The reader's EnterSubBlock expects to have
2139 // already read the ENTER_SUBBLOCK code (size getAbbrevIDWidth) and BlockID
2140 // (size BlockIDWidth). Note that we access the stream's AbbrevID width here
2141 // just before entering the VST subblock because: 1) the EnterSubBlock
2142 // changes the AbbrevID width; 2) the VST block is nested within the same
2143 // outer MODULE_BLOCK as the FUNCTION_BLOCKs and therefore have the same
2144 // AbbrevID width before calling EnterSubBlock; and 3) when we want to
2145 // jump to the FUNCTION_BLOCK using this offset later, we don't want
2146 // to rely on the stream's AbbrevID width being that of the MODULE_BLOCK.
2147 unsigned FuncBitcodeOffsetDelta =
2148 Stream.getAbbrevIDWidth() + bitc::BlockIDWidth;
2149
2150 if (Error Err = Stream.EnterSubBlock(bitc::VALUE_SYMTAB_BLOCK_ID))
2151 return Err;
2152
2153 SmallVector<uint64_t, 64> Record;
2154
2155 Triple TT(TheModule->getTargetTriple());
2156
2157 // Read all the records for this value table.
2158 SmallString<128> ValueName;
2159
2160 while (true) {
2161 Expected<BitstreamEntry> MaybeEntry = Stream.advanceSkippingSubblocks();
2162 if (!MaybeEntry)
2163 return MaybeEntry.takeError();
2164 BitstreamEntry Entry = MaybeEntry.get();
2165
2166 switch (Entry.Kind) {
2167 case BitstreamEntry::SubBlock: // Handled for us already.
2168 case BitstreamEntry::Error:
2169 return error("Malformed block");
2170 case BitstreamEntry::EndBlock:
2171 if (Offset > 0)
2172 if (Error JumpFailed = Stream.JumpToBit(CurrentBit))
2173 return JumpFailed;
2174 return Error::success();
2175 case BitstreamEntry::Record:
2176 // The interesting case.
2177 break;
2178 }
2179
2180 // Read a record.
2181 Record.clear();
2182 Expected<unsigned> MaybeRecord = Stream.readRecord(Entry.ID, Record);
2183 if (!MaybeRecord)
2184 return MaybeRecord.takeError();
2185 switch (MaybeRecord.get()) {
2186 default: // Default behavior: unknown type.
2187 break;
2188 case bitc::VST_CODE_ENTRY: { // VST_CODE_ENTRY: [valueid, namechar x N]
2189 Expected<Value *> ValOrErr = recordValue(Record, 1, TT);
2190 if (Error Err = ValOrErr.takeError())
2191 return Err;
2192 ValOrErr.get();
2193 break;
2194 }
2195 case bitc::VST_CODE_FNENTRY: {
2196 // VST_CODE_FNENTRY: [valueid, offset, namechar x N]
2197 Expected<Value *> ValOrErr = recordValue(Record, 2, TT);
2198 if (Error Err = ValOrErr.takeError())
2199 return Err;
2200 Value *V = ValOrErr.get();
2201
2202 // Ignore function offsets emitted for aliases of functions in older
2203 // versions of LLVM.
2204 if (auto *F = dyn_cast<Function>(V))
2205 setDeferredFunctionInfo(FuncBitcodeOffsetDelta, F, Record);
2206 break;
2207 }
2208 case bitc::VST_CODE_BBENTRY: {
2209 if (convertToString(Record, 1, ValueName))
2210 return error("Invalid record");
2211 BasicBlock *BB = getBasicBlock(Record[0]);
2212 if (!BB)
2213 return error("Invalid record");
2214
2215 BB->setName(StringRef(ValueName.data(), ValueName.size()));
2216 ValueName.clear();
2217 break;
2218 }
2219 }
2220 }
2221}
2222
2223/// Decode a signed value stored with the sign bit in the LSB for dense VBR
2224/// encoding.
2225uint64_t BitcodeReader::decodeSignRotatedValue(uint64_t V) {
2226 if ((V & 1) == 0)
2227 return V >> 1;
2228 if (V != 1)
2229 return -(V >> 1);
2230 // There is no such thing as -0 with integers. "-0" really means MININT.
2231 return 1ULL << 63;
2232}
2233
2234/// Resolve all of the initializers for global values and aliases that we can.
2235Error BitcodeReader::resolveGlobalAndIndirectSymbolInits() {
2236 std::vector<std::pair<GlobalVariable *, unsigned>> GlobalInitWorklist;
2237 std::vector<std::pair<GlobalIndirectSymbol *, unsigned>>
2238 IndirectSymbolInitWorklist;
2239 std::vector<std::pair<Function *, unsigned>> FunctionPrefixWorklist;
2240 std::vector<std::pair<Function *, unsigned>> FunctionPrologueWorklist;
2241 std::vector<std::pair<Function *, unsigned>> FunctionPersonalityFnWorklist;
2242
2243 GlobalInitWorklist.swap(GlobalInits);
2244 IndirectSymbolInitWorklist.swap(IndirectSymbolInits);
2245 FunctionPrefixWorklist.swap(FunctionPrefixes);
2246 FunctionPrologueWorklist.swap(FunctionPrologues);
2247 FunctionPersonalityFnWorklist.swap(FunctionPersonalityFns);
2248
2249 while (!GlobalInitWorklist.empty()) {
2250 unsigned ValID = GlobalInitWorklist.back().second;
2251 if (ValID >= ValueList.size()) {
2252 // Not ready to resolve this yet, it requires something later in the file.
2253 GlobalInits.push_back(GlobalInitWorklist.back());
2254 } else {
2255 if (Constant *C = dyn_cast_or_null<Constant>(ValueList[ValID]))
2256 GlobalInitWorklist.back().first->setInitializer(C);
2257 else
2258 return error("Expected a constant");
2259 }
2260 GlobalInitWorklist.pop_back();
2261 }
2262
2263 while (!IndirectSymbolInitWorklist.empty()) {
2264 unsigned ValID = IndirectSymbolInitWorklist.back().second;
2265 if (ValID >= ValueList.size()) {
2266 IndirectSymbolInits.push_back(IndirectSymbolInitWorklist.back());
2267 } else {
2268 Constant *C = dyn_cast_or_null<Constant>(ValueList[ValID]);
2269 if (!C)
2270 return error("Expected a constant");
2271 GlobalIndirectSymbol *GIS = IndirectSymbolInitWorklist.back().first;
2272 if (isa<GlobalAlias>(GIS) && C->getType() != GIS->getType())
2273 return error("Alias and aliasee types don't match");
2274 GIS->setIndirectSymbol(C);
2275 }
2276 IndirectSymbolInitWorklist.pop_back();
2277 }
2278
2279 while (!FunctionPrefixWorklist.empty()) {
2280 unsigned ValID = FunctionPrefixWorklist.back().second;
2281 if (ValID >= ValueList.size()) {
2282 FunctionPrefixes.push_back(FunctionPrefixWorklist.back());
2283 } else {
2284 if (Constant *C = dyn_cast_or_null<Constant>(ValueList[ValID]))
2285 FunctionPrefixWorklist.back().first->setPrefixData(C);
2286 else
2287 return error("Expected a constant");
2288 }
2289 FunctionPrefixWorklist.pop_back();
2290 }
2291
2292 while (!FunctionPrologueWorklist.empty()) {
2293 unsigned ValID = FunctionPrologueWorklist.back().second;
2294 if (ValID >= ValueList.size()) {
2295 FunctionPrologues.push_back(FunctionPrologueWorklist.back());
2296 } else {
2297 if (Constant *C = dyn_cast_or_null<Constant>(ValueList[ValID]))
2298 FunctionPrologueWorklist.back().first->setPrologueData(C);
2299 else
2300 return error("Expected a constant");
2301 }
2302 FunctionPrologueWorklist.pop_back();
2303 }
2304
2305 while (!FunctionPersonalityFnWorklist.empty()) {
2306 unsigned ValID = FunctionPersonalityFnWorklist.back().second;
2307 if (ValID >= ValueList.size()) {
2308 FunctionPersonalityFns.push_back(FunctionPersonalityFnWorklist.back());
2309 } else {
2310 if (Constant *C = dyn_cast_or_null<Constant>(ValueList[ValID]))
2311 FunctionPersonalityFnWorklist.back().first->setPersonalityFn(C);
2312 else
2313 return error("Expected a constant");
2314 }
2315 FunctionPersonalityFnWorklist.pop_back();
2316 }
2317
2318 return Error::success();
2319}
2320
2321static APInt readWideAPInt(ArrayRef<uint64_t> Vals, unsigned TypeBits) {
2322 SmallVector<uint64_t, 8> Words(Vals.size());
2323 transform(Vals, Words.begin(),
2324 BitcodeReader::decodeSignRotatedValue);
2325
2326 return APInt(TypeBits, Words);
2327}
2328
2329Error BitcodeReader::parseConstants() {
2330 if (Error Err = Stream.EnterSubBlock(bitc::CONSTANTS_BLOCK_ID))
2331 return Err;
2332
2333 SmallVector<uint64_t, 64> Record;
2334
2335 // Read all the records for this value table.
2336 Type *CurTy = Type::getInt32Ty(Context);
2337 Type *CurFullTy = Type::getInt32Ty(Context);
2338 unsigned NextCstNo = ValueList.size();
2339
2340 while (true) {
2341 Expected<BitstreamEntry> MaybeEntry = Stream.advanceSkippingSubblocks();
2342 if (!MaybeEntry)
2343 return MaybeEntry.takeError();
2344 BitstreamEntry Entry = MaybeEntry.get();
2345
2346 switch (Entry.Kind) {
2347 case BitstreamEntry::SubBlock: // Handled for us already.
2348 case BitstreamEntry::Error:
2349 return error("Malformed block");
2350 case BitstreamEntry::EndBlock:
2351 if (NextCstNo != ValueList.size())
2352 return error("Invalid constant reference");
2353
2354 // Once all the constants have been read, go through and resolve forward
2355 // references.
2356 ValueList.resolveConstantForwardRefs();
2357 return Error::success();
2358 case BitstreamEntry::Record:
2359 // The interesting case.
2360 break;
2361 }
2362
2363 // Read a record.
2364 Record.clear();
2365 Type *VoidType = Type::getVoidTy(Context);
2366 Value *V = nullptr;
2367 Expected<unsigned> MaybeBitCode = Stream.readRecord(Entry.ID, Record);
2368 if (!MaybeBitCode)
2369 return MaybeBitCode.takeError();
2370 switch (unsigned BitCode = MaybeBitCode.get()) {
2371 default: // Default behavior: unknown constant
2372 case bitc::CST_CODE_UNDEF: // UNDEF
2373 V = UndefValue::get(CurTy);
2374 break;
2375 case bitc::CST_CODE_SETTYPE: // SETTYPE: [typeid]
2376 if (Record.empty())
2377 return error("Invalid record");
2378 if (Record[0] >= TypeList.size() || !TypeList[Record[0]])
2379 return error("Invalid record");
2380 if (TypeList[Record[0]] == VoidType)
2381 return error("Invalid constant type");
2382 CurFullTy = TypeList[Record[0]];
2383 CurTy = flattenPointerTypes(CurFullTy);
2384 continue; // Skip the ValueList manipulation.
2385 case bitc::CST_CODE_NULL: // NULL
2386 if (CurTy->isVoidTy() || CurTy->isFunctionTy() || CurTy->isLabelTy())
2387 return error("Invalid type for a constant null value");
2388 V = Constant::getNullValue(CurTy);
2389 break;
2390 case bitc::CST_CODE_INTEGER: // INTEGER: [intval]
2391 if (!CurTy->isIntegerTy() || Record.empty())
2392 return error("Invalid record");
2393 V = ConstantInt::get(CurTy, decodeSignRotatedValue(Record[0]));
2394 break;
2395 case bitc::CST_CODE_WIDE_INTEGER: {// WIDE_INTEGER: [n x intval]
2396 if (!CurTy->isIntegerTy() || Record.empty())
2397 return error("Invalid record");
2398
2399 APInt VInt =
2400 readWideAPInt(Record, cast<IntegerType>(CurTy)->getBitWidth());
2401 V = ConstantInt::get(Context, VInt);
2402
2403 break;
2404 }
2405 case bitc::CST_CODE_FLOAT: { // FLOAT: [fpval]
2406 if (Record.empty())
2407 return error("Invalid record");
2408 if (CurTy->isHalfTy())
2409 V = ConstantFP::get(Context, APFloat(APFloat::IEEEhalf(),
2410 APInt(16, (uint16_t)Record[0])));
2411 else if (CurTy->isFloatTy())
2412 V = ConstantFP::get(Context, APFloat(APFloat::IEEEsingle(),
2413 APInt(32, (uint32_t)Record[0])));
2414 else if (CurTy->isDoubleTy())
2415 V = ConstantFP::get(Context, APFloat(APFloat::IEEEdouble(),
2416 APInt(64, Record[0])));
2417 else if (CurTy->isX86_FP80Ty()) {
2418 // Bits are not stored the same way as a normal i80 APInt, compensate.
2419 uint64_t Rearrange[2];
2420 Rearrange[0] = (Record[1] & 0xffffLL) | (Record[0] << 16);
2421 Rearrange[1] = Record[0] >> 48;
2422 V = ConstantFP::get(Context, APFloat(APFloat::x87DoubleExtended(),
2423 APInt(80, Rearrange)));
2424 } else if (CurTy->isFP128Ty())
2425 V = ConstantFP::get(Context, APFloat(APFloat::IEEEquad(),
2426 APInt(128, Record)));
2427 else if (CurTy->isPPC_FP128Ty())
2428 V = ConstantFP::get(Context, APFloat(APFloat::PPCDoubleDouble(),
2429 APInt(128, Record)));
2430 else
2431 V = UndefValue::get(CurTy);
2432 break;
2433 }
2434
2435 case bitc::CST_CODE_AGGREGATE: {// AGGREGATE: [n x value number]
2436 if (Record.empty())
2437 return error("Invalid record");
2438
2439 unsigned Size = Record.size();
2440 SmallVector<Constant*, 16> Elts;
2441
2442 if (StructType *STy = dyn_cast<StructType>(CurTy)) {
2443 for (unsigned i = 0; i != Size; ++i)
2444 Elts.push_back(ValueList.getConstantFwdRef(Record[i],
2445 STy->getElementType(i)));
2446 V = ConstantStruct::get(STy, Elts);
2447 } else if (ArrayType *ATy = dyn_cast<ArrayType>(CurTy)) {
2448 Type *EltTy = ATy->getElementType();
2449 for (unsigned i = 0; i != Size; ++i)
2450 Elts.push_back(ValueList.getConstantFwdRef(Record[i], EltTy));
2451 V = ConstantArray::get(ATy, Elts);
2452 } else if (VectorType *VTy = dyn_cast<VectorType>(CurTy)) {
2453 Type *EltTy = VTy->getElementType();
2454 for (unsigned i = 0; i != Size; ++i)
2455 Elts.push_back(ValueList.getConstantFwdRef(Record[i], EltTy));
2456 V = ConstantVector::get(Elts);
2457 } else {
2458 V = UndefValue::get(CurTy);
2459 }
2460 break;
2461 }
2462 case bitc::CST_CODE_STRING: // STRING: [values]
2463 case bitc::CST_CODE_CSTRING: { // CSTRING: [values]
2464 if (Record.empty())
2465 return error("Invalid record");
2466
2467 SmallString<16> Elts(Record.begin(), Record.end());
2468 V = ConstantDataArray::getString(Context, Elts,
2469 BitCode == bitc::CST_CODE_CSTRING);
2470 break;
2471 }
2472 case bitc::CST_CODE_DATA: {// DATA: [n x value]
2473 if (Record.empty())
2474 return error("Invalid record");
2475
2476 Type *EltTy = cast<SequentialType>(CurTy)->getElementType();
2477 if (EltTy->isIntegerTy(8)) {
2478 SmallVector<uint8_t, 16> Elts(Record.begin(), Record.end());
2479 if (isa<VectorType>(CurTy))
2480 V = ConstantDataVector::get(Context, Elts);
2481 else
2482 V = ConstantDataArray::get(Context, Elts);
2483 } else if (EltTy->isIntegerTy(16)) {
2484 SmallVector<uint16_t, 16> Elts(Record.begin(), Record.end());
2485 if (isa<VectorType>(CurTy))
2486 V = ConstantDataVector::get(Context, Elts);
2487 else
2488 V = ConstantDataArray::get(Context, Elts);
2489 } else if (EltTy->isIntegerTy(32)) {
2490 SmallVector<uint32_t, 16> Elts(Record.begin(), Record.end());
2491 if (isa<VectorType>(CurTy))
2492 V = ConstantDataVector::get(Context, Elts);
2493 else
2494 V = ConstantDataArray::get(Context, Elts);
2495 } else if (EltTy->isIntegerTy(64)) {
2496 SmallVector<uint64_t, 16> Elts(Record.begin(), Record.end());
2497 if (isa<VectorType>(CurTy))
2498 V = ConstantDataVector::get(Context, Elts);
2499 else
2500 V = ConstantDataArray::get(Context, Elts);
2501 } else if (EltTy->isHalfTy()) {
2502 SmallVector<uint16_t, 16> Elts(Record.begin(), Record.end());
2503 if (isa<VectorType>(CurTy))
2504 V = ConstantDataVector::getFP(Context, Elts);
2505 else
2506 V = ConstantDataArray::getFP(Context, Elts);
2507 } else if (EltTy->isFloatTy()) {
2508 SmallVector<uint32_t, 16> Elts(Record.begin(), Record.end());
2509 if (isa<VectorType>(CurTy))
2510 V = ConstantDataVector::getFP(Context, Elts);
2511 else
2512 V = ConstantDataArray::getFP(Context, Elts);
2513 } else if (EltTy->isDoubleTy()) {
2514 SmallVector<uint64_t, 16> Elts(Record.begin(), Record.end());
2515 if (isa<VectorType>(CurTy))
2516 V = ConstantDataVector::getFP(Context, Elts);
2517 else
2518 V = ConstantDataArray::getFP(Context, Elts);
2519 } else {
2520 return error("Invalid type for value");
2521 }
2522 break;
2523 }
2524 case bitc::CST_CODE_CE_UNOP: { // CE_UNOP: [opcode, opval]
2525 if (Record.size() < 2)
2526 return error("Invalid record");
2527 int Opc = getDecodedUnaryOpcode(Record[0], CurTy);
2528 if (Opc < 0) {
2529 V = UndefValue::get(CurTy); // Unknown unop.
2530 } else {
2531 Constant *LHS = ValueList.getConstantFwdRef(Record[1], CurTy);
2532 unsigned Flags = 0;
2533 V = ConstantExpr::get(Opc, LHS, Flags);
2534 }
2535 break;
2536 }
2537 case bitc::CST_CODE_CE_BINOP: { // CE_BINOP: [opcode, opval, opval]
2538 if (Record.size() < 3)
2539 return error("Invalid record");
2540 int Opc = getDecodedBinaryOpcode(Record[0], CurTy);
2541 if (Opc < 0) {
2542 V = UndefValue::get(CurTy); // Unknown binop.
2543 } else {
2544 Constant *LHS = ValueList.getConstantFwdRef(Record[1], CurTy);
2545 Constant *RHS = ValueList.getConstantFwdRef(Record[2], CurTy);
2546 unsigned Flags = 0;
2547 if (Record.size() >= 4) {
2548 if (Opc == Instruction::Add ||
2549 Opc == Instruction::Sub ||
2550 Opc == Instruction::Mul ||
2551 Opc == Instruction::Shl) {
2552 if (Record[3] & (1 << bitc::OBO_NO_SIGNED_WRAP))
2553 Flags |= OverflowingBinaryOperator::NoSignedWrap;
2554 if (Record[3] & (1 << bitc::OBO_NO_UNSIGNED_WRAP))
2555 Flags |= OverflowingBinaryOperator::NoUnsignedWrap;
2556 } else if (Opc == Instruction::SDiv ||
2557 Opc == Instruction::UDiv ||
2558 Opc == Instruction::LShr ||
2559 Opc == Instruction::AShr) {
2560 if (Record[3] & (1 << bitc::PEO_EXACT))
2561 Flags |= SDivOperator::IsExact;
2562 }
2563 }
2564 V = ConstantExpr::get(Opc, LHS, RHS, Flags);
2565 }
2566 break;
2567 }
2568 case bitc::CST_CODE_CE_CAST: { // CE_CAST: [opcode, opty, opval]
2569 if (Record.size() < 3)
2570 return error("Invalid record");
2571 int Opc = getDecodedCastOpcode(Record[0]);
2572 if (Opc < 0) {
2573 V = UndefValue::get(CurTy); // Unknown cast.
2574 } else {
2575 Type *OpTy = getTypeByID(Record[1]);
2576 if (!OpTy)
2577 return error("Invalid record");
2578 Constant *Op = ValueList.getConstantFwdRef(Record[2], OpTy);
2579 V = UpgradeBitCastExpr(Opc, Op, CurTy);
2580 if (!V) V = ConstantExpr::getCast(Opc, Op, CurTy);
2581 }
2582 break;
2583 }
2584 case bitc::CST_CODE_CE_INBOUNDS_GEP: // [ty, n x operands]
2585 case bitc::CST_CODE_CE_GEP: // [ty, n x operands]
2586 case bitc::CST_CODE_CE_GEP_WITH_INRANGE_INDEX: { // [ty, flags, n x
2587 // operands]
2588 unsigned OpNum = 0;
2589 Type *PointeeType = nullptr;
2590 if (BitCode == bitc::CST_CODE_CE_GEP_WITH_INRANGE_INDEX ||
2591 Record.size() % 2)
2592 PointeeType = getTypeByID(Record[OpNum++]);
2593
2594 bool InBounds = false;
2595 Optional<unsigned> InRangeIndex;
2596 if (BitCode == bitc::CST_CODE_CE_GEP_WITH_INRANGE_INDEX) {
2597 uint64_t Op = Record[OpNum++];
2598 InBounds = Op & 1;
2599 InRangeIndex = Op >> 1;
2600 } else if (BitCode == bitc::CST_CODE_CE_INBOUNDS_GEP)
2601 InBounds = true;
2602
2603 SmallVector<Constant*, 16> Elts;
2604 Type *Elt0FullTy = nullptr;
2605 while (OpNum != Record.size()) {
2606 if (!Elt0FullTy)
2607 Elt0FullTy = getFullyStructuredTypeByID(Record[OpNum]);
2608 Type *ElTy = getTypeByID(Record[OpNum++]);
2609 if (!ElTy)
2610 return error("Invalid record");
2611 Elts.push_back(ValueList.getConstantFwdRef(Record[OpNum++], ElTy));
2612 }
2613
2614 if (Elts.size() < 1)
2615 return error("Invalid gep with no operands");
2616
2617 Type *ImplicitPointeeType =
2618 getPointerElementFlatType(Elt0FullTy->getScalarType());
2619 if (!PointeeType)
2620 PointeeType = ImplicitPointeeType;
2621 else if (PointeeType != ImplicitPointeeType)
2622 return error("Explicit gep operator type does not match pointee type "
2623 "of pointer operand");
2624
2625 ArrayRef<Constant *> Indices(Elts.begin() + 1, Elts.end());
2626 V = ConstantExpr::getGetElementPtr(PointeeType, Elts[0], Indices,
2627 InBounds, InRangeIndex);
2628 break;
2629 }
2630 case bitc::CST_CODE_CE_SELECT: { // CE_SELECT: [opval#, opval#, opval#]
2631 if (Record.size() < 3)
2632 return error("Invalid record");
2633
2634 Type *SelectorTy = Type::getInt1Ty(Context);
2635
2636 // The selector might be an i1, an <n x i1>, or a <vscale x n x i1>
2637 // Get the type from the ValueList before getting a forward ref.
2638 if (VectorType *VTy = dyn_cast<VectorType>(CurTy))
2639 if (Value *V = ValueList[Record[0]])
2640 if (SelectorTy != V->getType())
2641 SelectorTy = VectorType::get(SelectorTy,
2642 VTy->getElementCount());
2643
2644 V = ConstantExpr::getSelect(ValueList.getConstantFwdRef(Record[0],
2645 SelectorTy),
2646 ValueList.getConstantFwdRef(Record[1],CurTy),
2647 ValueList.getConstantFwdRef(Record[2],CurTy));
2648 break;
2649 }
2650 case bitc::CST_CODE_CE_EXTRACTELT
2651 : { // CE_EXTRACTELT: [opty, opval, opty, opval]
2652 if (Record.size() < 3)
2653 return error("Invalid record");
2654 VectorType *OpTy =
2655 dyn_cast_or_null<VectorType>(getTypeByID(Record[0]));
2656 if (!OpTy)
2657 return error("Invalid record");
2658 Constant *Op0 = ValueList.getConstantFwdRef(Record[1], OpTy);
2659 Constant *Op1 = nullptr;
2660 if (Record.size() == 4) {
2661 Type *IdxTy = getTypeByID(Record[2]);
2662 if (!IdxTy)
2663 return error("Invalid record");
2664 Op1 = ValueList.getConstantFwdRef(Record[3], IdxTy);
2665 } else // TODO: Remove with llvm 4.0
2666 Op1 = ValueList.getConstantFwdRef(Record[2], Type::getInt32Ty(Context));
2667 if (!Op1)
2668 return error("Invalid record");
2669 V = ConstantExpr::getExtractElement(Op0, Op1);
2670 break;
2671 }
2672 case bitc::CST_CODE_CE_INSERTELT
2673 : { // CE_INSERTELT: [opval, opval, opty, opval]
2674 VectorType *OpTy = dyn_cast<VectorType>(CurTy);
2675 if (Record.size() < 3 || !OpTy)
2676 return error("Invalid record");
2677 Constant *Op0 = ValueList.getConstantFwdRef(Record[0], OpTy);
2678 Constant *Op1 = ValueList.getConstantFwdRef(Record[1],
2679 OpTy->getElementType());
2680 Constant *Op2 = nullptr;
2681 if (Record.size() == 4) {
2682 Type *IdxTy = getTypeByID(Record[2]);
2683 if (!IdxTy)
2684 return error("Invalid record");
2685 Op2 = ValueList.getConstantFwdRef(Record[3], IdxTy);
2686 } else // TODO: Remove with llvm 4.0
2687 Op2 = ValueList.getConstantFwdRef(Record[2], Type::getInt32Ty(Context));
2688 if (!Op2)
2689 return error("Invalid record");
2690 V = ConstantExpr::getInsertElement(Op0, Op1, Op2);
2691 break;
2692 }
2693 case bitc::CST_CODE_CE_SHUFFLEVEC: { // CE_SHUFFLEVEC: [opval, opval, opval]
2694 VectorType *OpTy = dyn_cast<VectorType>(CurTy);
2695 if (Record.size() < 3 || !OpTy)
2696 return error("Invalid record");
2697 Constant *Op0 = ValueList.getConstantFwdRef(Record[0], OpTy);
2698 Constant *Op1 = ValueList.getConstantFwdRef(Record[1], OpTy);
2699 Type *ShufTy = VectorType::get(Type::getInt32Ty(Context),
2700 OpTy->getElementCount());
2701 Constant *Op2 = ValueList.getConstantFwdRef(Record[2], ShufTy);
2702 V = ConstantExpr::getShuffleVector(Op0, Op1, Op2);
2703 break;
2704 }
2705 case bitc::CST_CODE_CE_SHUFVEC_EX: { // [opty, opval, opval, opval]
2706 VectorType *RTy = dyn_cast<VectorType>(CurTy);
2707 VectorType *OpTy =
2708 dyn_cast_or_null<VectorType>(getTypeByID(Record[0]));
2709 if (Record.size() < 4 || !RTy || !OpTy)
2710 return error("Invalid record");
2711 Constant *Op0 = ValueList.getConstantFwdRef(Record[1], OpTy);
2712 Constant *Op1 = ValueList.getConstantFwdRef(Record[2], OpTy);
2713 Type *ShufTy = VectorType::get(Type::getInt32Ty(Context),
2714 RTy->getElementCount());
2715 Constant *Op2 = ValueList.getConstantFwdRef(Record[3], ShufTy);
2716 V = ConstantExpr::getShuffleVector(Op0, Op1, Op2);
2717 break;
2718 }
2719 case bitc::CST_CODE_CE_CMP: { // CE_CMP: [opty, opval, opval, pred]
2720 if (Record.size() < 4)
2721 return error("Invalid record");
2722 Type *OpTy = getTypeByID(Record[0]);
2723 if (!OpTy)
2724 return error("Invalid record");
2725 Constant *Op0 = ValueList.getConstantFwdRef(Record[1], OpTy);
2726 Constant *Op1 = ValueList.getConstantFwdRef(Record[2], OpTy);
2727
2728 if (OpTy->isFPOrFPVectorTy())
2729 V = ConstantExpr::getFCmp(Record[3], Op0, Op1);
2730 else
2731 V = ConstantExpr::getICmp(Record[3], Op0, Op1);
2732 break;
2733 }
2734 // This maintains backward compatibility, pre-asm dialect keywords.
2735 // FIXME: Remove with the 4.0 release.
2736 case bitc::CST_CODE_INLINEASM_OLD: {
2737 if (Record.size() < 2)
2738 return error("Invalid record");
2739 std::string AsmStr, ConstrStr;
2740 bool HasSideEffects = Record[0] & 1;
2741 bool IsAlignStack = Record[0] >> 1;
2742 unsigned AsmStrSize = Record[1];
2743 if (2+AsmStrSize >= Record.size())
2744 return error("Invalid record");
2745 unsigned ConstStrSize = Record[2+AsmStrSize];
2746 if (3+AsmStrSize+ConstStrSize > Record.size())
2747 return error("Invalid record");
2748
2749 for (unsigned i = 0; i != AsmStrSize; ++i)
2750 AsmStr += (char)Record[2+i];
2751 for (unsigned i = 0; i != ConstStrSize; ++i)
2752 ConstrStr += (char)Record[3+AsmStrSize+i];
2753 UpgradeInlineAsmString(&AsmStr);
2754 V = InlineAsm::get(
2755 cast<FunctionType>(getPointerElementFlatType(CurFullTy)), AsmStr,
2756 ConstrStr, HasSideEffects, IsAlignStack);
2757 break;
2758 }
2759 // This version adds support for the asm dialect keywords (e.g.,
2760 // inteldialect).
2761 case bitc::CST_CODE_INLINEASM: {
2762 if (Record.size() < 2)
2763 return error("Invalid record");
2764 std::string AsmStr, ConstrStr;
2765 bool HasSideEffects = Record[0] & 1;
2766 bool IsAlignStack = (Record[0] >> 1) & 1;
2767 unsigned AsmDialect = Record[0] >> 2;
2768 unsigned AsmStrSize = Record[1];
2769 if (2+AsmStrSize >= Record.size())
2770 return error("Invalid record");
2771 unsigned ConstStrSize = Record[2+AsmStrSize];
2772 if (3+AsmStrSize+ConstStrSize > Record.size())
2773 return error("Invalid record");
2774
2775 for (unsigned i = 0; i != AsmStrSize; ++i)
2776 AsmStr += (char)Record[2+i];
2777 for (unsigned i = 0; i != ConstStrSize; ++i)
2778 ConstrStr += (char)Record[3+AsmStrSize+i];
2779 UpgradeInlineAsmString(&AsmStr);
2780 V = InlineAsm::get(
2781 cast<FunctionType>(getPointerElementFlatType(CurFullTy)), AsmStr,
2782 ConstrStr, HasSideEffects, IsAlignStack,
2783 InlineAsm::AsmDialect(AsmDialect));
2784 break;
2785 }
2786 case bitc::CST_CODE_BLOCKADDRESS:{
2787 if (Record.size() < 3)
2788 return error("Invalid record");
2789 Type *FnTy = getTypeByID(Record[0]);
2790 if (!FnTy)
2791 return error("Invalid record");
2792 Function *Fn =
2793 dyn_cast_or_null<Function>(ValueList.getConstantFwdRef(Record[1],FnTy));
2794 if (!Fn)
2795 return error("Invalid record");
2796
2797 // If the function is already parsed we can insert the block address right
2798 // away.
2799 BasicBlock *BB;
2800 unsigned BBID = Record[2];
2801 if (!BBID)
2802 // Invalid reference to entry block.
2803 return error("Invalid ID");
2804 if (!Fn->empty()) {
2805 Function::iterator BBI = Fn->begin(), BBE = Fn->end();
2806 for (size_t I = 0, E = BBID; I != E; ++I) {
2807 if (BBI == BBE)
2808 return error("Invalid ID");
2809 ++BBI;
2810 }
2811 BB = &*BBI;
2812 } else {
2813 // Otherwise insert a placeholder and remember it so it can be inserted
2814 // when the function is parsed.
2815 auto &FwdBBs = BasicBlockFwdRefs[Fn];
2816 if (FwdBBs.empty())
2817 BasicBlockFwdRefQueue.push_back(Fn);
2818 if (FwdBBs.size() < BBID + 1)
2819 FwdBBs.resize(BBID + 1);
2820 if (!FwdBBs[BBID])
2821 FwdBBs[BBID] = BasicBlock::Create(Context);
2822 BB = FwdBBs[BBID];
2823 }
2824 V = BlockAddress::get(Fn, BB);
2825 break;
2826 }
2827 }
2828
2829 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-11~++20200309111110+2c36c23f347/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 2830, __PRETTY_FUNCTION__))
2830 "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-11~++20200309111110+2c36c23f347/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 2830, __PRETTY_FUNCTION__))
;
2831 ValueList.assignValue(V, NextCstNo, CurFullTy);
2832 ++NextCstNo;
2833 }
2834}
2835
2836Error BitcodeReader::parseUseLists() {
2837 if (Error Err = Stream.EnterSubBlock(bitc::USELIST_BLOCK_ID))
2838 return Err;
2839
2840 // Read all the records.
2841 SmallVector<uint64_t, 64> Record;
2842
2843 while (true) {
2844 Expected<BitstreamEntry> MaybeEntry = Stream.advanceSkippingSubblocks();
2845 if (!MaybeEntry)
2846 return MaybeEntry.takeError();
2847 BitstreamEntry Entry = MaybeEntry.get();
2848
2849 switch (Entry.Kind) {
2850 case BitstreamEntry::SubBlock: // Handled for us already.
2851 case BitstreamEntry::Error:
2852 return error("Malformed block");
2853 case BitstreamEntry::EndBlock:
2854 return Error::success();
2855 case BitstreamEntry::Record:
2856 // The interesting case.
2857 break;
2858 }
2859
2860 // Read a use list record.
2861 Record.clear();
2862 bool IsBB = false;
2863 Expected<unsigned> MaybeRecord = Stream.readRecord(Entry.ID, Record);
2864 if (!MaybeRecord)
2865 return MaybeRecord.takeError();
2866 switch (MaybeRecord.get()) {
2867 default: // Default behavior: unknown type.
2868 break;
2869 case bitc::USELIST_CODE_BB:
2870 IsBB = true;
2871 LLVM_FALLTHROUGH[[gnu::fallthrough]];
2872 case bitc::USELIST_CODE_DEFAULT: {
2873 unsigned RecordLength = Record.size();
2874 if (RecordLength < 3)
2875 // Records should have at least an ID and two indexes.
2876 return error("Invalid record");
2877 unsigned ID = Record.back();
2878 Record.pop_back();
2879
2880 Value *V;
2881 if (IsBB) {
2882 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-11~++20200309111110+2c36c23f347/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 2882, __PRETTY_FUNCTION__))
;
2883 V = FunctionBBs[ID];
2884 } else
2885 V = ValueList[ID];
2886 unsigned NumUses = 0;
2887 SmallDenseMap<const Use *, unsigned, 16> Order;
2888 for (const Use &U : V->materialized_uses()) {
2889 if (++NumUses > Record.size())
2890 break;
2891 Order[&U] = Record[NumUses - 1];
2892 }
2893 if (Order.size() != Record.size() || NumUses > Record.size())
2894 // Mismatches can happen if the functions are being materialized lazily
2895 // (out-of-order), or a value has been upgraded.
2896 break;
2897
2898 V->sortUseList([&](const Use &L, const Use &R) {
2899 return Order.lookup(&L) < Order.lookup(&R);
2900 });
2901 break;
2902 }
2903 }
2904 }
2905}
2906
2907/// When we see the block for metadata, remember where it is and then skip it.
2908/// This lets us lazily deserialize the metadata.
2909Error BitcodeReader::rememberAndSkipMetadata() {
2910 // Save the current stream state.
2911 uint64_t CurBit = Stream.GetCurrentBitNo();
2912 DeferredMetadataInfo.push_back(CurBit);
2913
2914 // Skip over the block for now.
2915 if (Error Err = Stream.SkipBlock())
2916 return Err;
2917 return Error::success();
2918}
2919
2920Error BitcodeReader::materializeMetadata() {
2921 for (uint64_t BitPos : DeferredMetadataInfo) {
2922 // Move the bit stream to the saved position.
2923 if (Error JumpFailed = Stream.JumpToBit(BitPos))
2924 return JumpFailed;
2925 if (Error Err = MDLoader->parseModuleMetadata())
2926 return Err;
2927 }
2928
2929 // Upgrade "Linker Options" module flag to "llvm.linker.options" module-level
2930 // metadata.
2931 if (Metadata *Val = TheModule->getModuleFlag("Linker Options")) {
2932 NamedMDNode *LinkerOpts =
2933 TheModule->getOrInsertNamedMetadata("llvm.linker.options");
2934 for (const MDOperand &MDOptions : cast<MDNode>(Val)->operands())
2935 LinkerOpts->addOperand(cast<MDNode>(MDOptions));
2936 }
2937
2938 DeferredMetadataInfo.clear();
2939 return Error::success();
2940}
2941
2942void BitcodeReader::setStripDebugInfo() { StripDebugInfo = true; }
2943
2944/// When we see the block for a function body, remember where it is and then
2945/// skip it. This lets us lazily deserialize the functions.
2946Error BitcodeReader::rememberAndSkipFunctionBody() {
2947 // Get the function we are talking about.
2948 if (FunctionsWithBodies.empty())
2949 return error("Insufficient function protos");
2950
2951 Function *Fn = FunctionsWithBodies.back();
2952 FunctionsWithBodies.pop_back();
2953
2954 // Save the current stream state.
2955 uint64_t CurBit = Stream.GetCurrentBitNo();
2956 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-11~++20200309111110+2c36c23f347/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 2958, __PRETTY_FUNCTION__))
2957 (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-11~++20200309111110+2c36c23f347/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 2958, __PRETTY_FUNCTION__))
2958 "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-11~++20200309111110+2c36c23f347/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 2958, __PRETTY_FUNCTION__))
;
2959 DeferredFunctionInfo[Fn] = CurBit;
2960
2961 // Skip over the function block for now.
2962 if (Error Err = Stream.SkipBlock())
2963 return Err;
2964 return Error::success();
2965}
2966
2967Error BitcodeReader::globalCleanup() {
2968 // Patch the initializers for globals and aliases up.
2969 if (Error Err = resolveGlobalAndIndirectSymbolInits())
2970 return Err;
2971 if (!GlobalInits.empty() || !IndirectSymbolInits.empty())
2972 return error("Malformed global initializer set");
2973
2974 // Look for intrinsic functions which need to be upgraded at some point
2975 for (Function &F : *TheModule) {
2976 MDLoader->upgradeDebugIntrinsics(F);
2977 Function *NewFn;
2978 if (UpgradeIntrinsicFunction(&F, NewFn))
2979 UpgradedIntrinsics[&F] = NewFn;
2980 else if (auto Remangled = Intrinsic::remangleIntrinsicFunction(&F))
2981 // Some types could be renamed during loading if several modules are
2982 // loaded in the same LLVMContext (LTO scenario). In this case we should
2983 // remangle intrinsics names as well.
2984 RemangledIntrinsics[&F] = Remangled.getValue();
2985 }
2986
2987 // Look for global variables which need to be renamed.
2988 std::vector<std::pair<GlobalVariable *, GlobalVariable *>> UpgradedVariables;
2989 for (GlobalVariable &GV : TheModule->globals())
2990 if (GlobalVariable *Upgraded = UpgradeGlobalVariable(&GV))
2991 UpgradedVariables.emplace_back(&GV, Upgraded);
2992 for (auto &Pair : UpgradedVariables) {
2993 Pair.first->eraseFromParent();
2994 TheModule->getGlobalList().push_back(Pair.second);
2995 }
2996
2997 // Force deallocation of memory for these vectors to favor the client that
2998 // want lazy deserialization.
2999 std::vector<std::pair<GlobalVariable *, unsigned>>().swap(GlobalInits);
3000 std::vector<std::pair<GlobalIndirectSymbol *, unsigned>>().swap(
3001 IndirectSymbolInits);
3002 return Error::success();
3003}
3004
3005/// Support for lazy parsing of function bodies. This is required if we
3006/// either have an old bitcode file without a VST forward declaration record,
3007/// or if we have an anonymous function being materialized, since anonymous
3008/// functions do not have a name and are therefore not in the VST.
3009Error BitcodeReader::rememberAndSkipFunctionBodies() {
3010 if (Error JumpFailed = Stream.JumpToBit(NextUnreadBit))
3011 return JumpFailed;
3012
3013 if (Stream.AtEndOfStream())
3014 return error("Could not find function in stream");
3015
3016 if (!SeenFirstFunctionBody)
3017 return error("Trying to materialize functions before seeing function blocks");
3018
3019 // An old bitcode file with the symbol table at the end would have
3020 // finished the parse greedily.
3021 assert(SeenValueSymbolTable)((SeenValueSymbolTable) ? static_cast<void> (0) : __assert_fail
("SeenValueSymbolTable", "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 3021, __PRETTY_FUNCTION__))
;
3022
3023 SmallVector<uint64_t, 64> Record;
3024
3025 while (true) {
3026 Expected<llvm::BitstreamEntry> MaybeEntry = Stream.advance();
3027 if (!MaybeEntry)
3028 return MaybeEntry.takeError();
3029 llvm::BitstreamEntry Entry = MaybeEntry.get();
3030
3031 switch (Entry.Kind) {
3032 default:
3033 return error("Expect SubBlock");
3034 case BitstreamEntry::SubBlock:
3035 switch (Entry.ID) {
3036 default:
3037 return error("Expect function block");
3038 case bitc::FUNCTION_BLOCK_ID:
3039 if (Error Err = rememberAndSkipFunctionBody())
3040 return Err;
3041 NextUnreadBit = Stream.GetCurrentBitNo();
3042 return Error::success();
3043 }
3044 }
3045 }
3046}
3047
3048bool BitcodeReaderBase::readBlockInfo() {
3049 Expected<Optional<BitstreamBlockInfo>> MaybeNewBlockInfo =
3050 Stream.ReadBlockInfoBlock();
3051 if (!MaybeNewBlockInfo)
3052 return true; // FIXME Handle the error.
3053 Optional<BitstreamBlockInfo> NewBlockInfo =
3054 std::move(MaybeNewBlockInfo.get());
3055 if (!NewBlockInfo)
3056 return true;
3057 BlockInfo = std::move(*NewBlockInfo);
3058 return false;
3059}
3060
3061Error BitcodeReader::parseComdatRecord(ArrayRef<uint64_t> Record) {
3062 // v1: [selection_kind, name]
3063 // v2: [strtab_offset, strtab_size, selection_kind]
3064 StringRef Name;
3065 std::tie(Name, Record) = readNameFromStrtab(Record);
3066
3067 if (Record.empty())
3068 return error("Invalid record");
3069 Comdat::SelectionKind SK = getDecodedComdatSelectionKind(Record[0]);
3070 std::string OldFormatName;
3071 if (!UseStrtab) {
3072 if (Record.size() < 2)
3073 return error("Invalid record");
3074 unsigned ComdatNameSize = Record[1];
3075 OldFormatName.reserve(ComdatNameSize);
3076 for (unsigned i = 0; i != ComdatNameSize; ++i)
3077 OldFormatName += (char)Record[2 + i];
3078 Name = OldFormatName;
3079 }
3080 Comdat *C = TheModule->getOrInsertComdat(Name);
3081 C->setSelectionKind(SK);
3082 ComdatList.push_back(C);
3083 return Error::success();
3084}
3085
3086static void inferDSOLocal(GlobalValue *GV) {
3087 // infer dso_local from linkage and visibility if it is not encoded.
3088 if (GV->hasLocalLinkage() ||
3089 (!GV->hasDefaultVisibility() && !GV->hasExternalWeakLinkage()))
3090 GV->setDSOLocal(true);
3091}
3092
3093Error BitcodeReader::parseGlobalVarRecord(ArrayRef<uint64_t> Record) {
3094 // v1: [pointer type, isconst, initid, linkage, alignment, section,
3095 // visibility, threadlocal, unnamed_addr, externally_initialized,
3096 // dllstorageclass, comdat, attributes, preemption specifier,
3097 // partition strtab offset, partition strtab size] (name in VST)
3098 // v2: [strtab_offset, strtab_size, v1]
3099 StringRef Name;
3100 std::tie(Name, Record) = readNameFromStrtab(Record);
3101
3102 if (Record.size() < 6)
3103 return error("Invalid record");
3104 Type *FullTy = getFullyStructuredTypeByID(Record[0]);
3105 Type *Ty = flattenPointerTypes(FullTy);
3106 if (!Ty)
3107 return error("Invalid record");
3108 bool isConstant = Record[1] & 1;
3109 bool explicitType = Record[1] & 2;
3110 unsigned AddressSpace;
3111 if (explicitType) {
3112 AddressSpace = Record[1] >> 2;
3113 } else {
3114 if (!Ty->isPointerTy())
3115 return error("Invalid type for value");
3116 AddressSpace = cast<PointerType>(Ty)->getAddressSpace();
3117 std::tie(FullTy, Ty) = getPointerElementTypes(FullTy);
3118 }
3119
3120 uint64_t RawLinkage = Record[3];
3121 GlobalValue::LinkageTypes Linkage = getDecodedLinkage(RawLinkage);
3122 MaybeAlign Alignment;
3123 if (Error Err = parseAlignmentValue(Record[4], Alignment))
3124 return Err;
3125 std::string Section;
3126 if (Record[5]) {
3127 if (Record[5] - 1 >= SectionTable.size())
3128 return error("Invalid ID");
3129 Section = SectionTable[Record[5] - 1];
3130 }
3131 GlobalValue::VisibilityTypes Visibility = GlobalValue::DefaultVisibility;
3132 // Local linkage must have default visibility.
3133 if (Record.size() > 6 && !GlobalValue::isLocalLinkage(Linkage))
3134 // FIXME: Change to an error if non-default in 4.0.
3135 Visibility = getDecodedVisibility(Record[6]);
3136
3137 GlobalVariable::ThreadLocalMode TLM = GlobalVariable::NotThreadLocal;
3138 if (Record.size() > 7)
3139 TLM = getDecodedThreadLocalMode(Record[7]);
3140
3141 GlobalValue::UnnamedAddr UnnamedAddr = GlobalValue::UnnamedAddr::None;
3142 if (Record.size() > 8)
3143 UnnamedAddr = getDecodedUnnamedAddrType(Record[8]);
3144
3145 bool ExternallyInitialized = false;
3146 if (Record.size() > 9)
3147 ExternallyInitialized = Record[9];
3148
3149 GlobalVariable *NewGV =
3150 new GlobalVariable(*TheModule, Ty, isConstant, Linkage, nullptr, Name,
3151 nullptr, TLM, AddressSpace, ExternallyInitialized);
3152 NewGV->setAlignment(Alignment);
3153 if (!Section.empty())
3154 NewGV->setSection(Section);
3155 NewGV->setVisibility(Visibility);
3156 NewGV->setUnnamedAddr(UnnamedAddr);
3157
3158 if (Record.size() > 10)
3159 NewGV->setDLLStorageClass(getDecodedDLLStorageClass(Record[10]));
3160 else
3161 upgradeDLLImportExportLinkage(NewGV, RawLinkage);
3162
3163 FullTy = PointerType::get(FullTy, AddressSpace);
3164 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-11~++20200309111110+2c36c23f347/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 3165, __PRETTY_FUNCTION__))
3165 "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-11~++20200309111110+2c36c23f347/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 3165, __PRETTY_FUNCTION__))
;
3166 ValueList.push_back(NewGV, FullTy);
3167
3168 // Remember which value to use for the global initializer.
3169 if (unsigned InitID = Record[2])
3170 GlobalInits.push_back(std::make_pair(NewGV, InitID - 1));
3171
3172 if (Record.size() > 11) {
3173 if (unsigned ComdatID = Record[11]) {
3174 if (ComdatID > ComdatList.size())
3175 return error("Invalid global variable comdat ID");
3176 NewGV->setComdat(ComdatList[ComdatID - 1]);
3177 }
3178 } else if (hasImplicitComdat(RawLinkage)) {
3179 NewGV->setComdat(reinterpret_cast<Comdat *>(1));
3180 }
3181
3182 if (Record.size() > 12) {
3183 auto AS = getAttributes(Record[12]).getFnAttributes();
3184 NewGV->setAttributes(AS);
3185 }
3186
3187 if (Record.size() > 13) {
3188 NewGV->setDSOLocal(getDecodedDSOLocal(Record[13]));
3189 }
3190 inferDSOLocal(NewGV);
3191
3192 // Check whether we have enough values to read a partition name.
3193 if (Record.size() > 15)
3194 NewGV->setPartition(StringRef(Strtab.data() + Record[14], Record[15]));
3195
3196 return Error::success();
3197}
3198
3199Error BitcodeReader::parseFunctionRecord(ArrayRef<uint64_t> Record) {
3200 // v1: [type, callingconv, isproto, linkage, paramattr, alignment, section,
3201 // visibility, gc, unnamed_addr, prologuedata, dllstorageclass, comdat,
3202 // prefixdata, personalityfn, preemption specifier, addrspace] (name in VST)
3203 // v2: [strtab_offset, strtab_size, v1]
3204 StringRef Name;
3205 std::tie(Name, Record) = readNameFromStrtab(Record);
3206
3207 if (Record.size() < 8)
3208 return error("Invalid record");
3209 Type *FullFTy = getFullyStructuredTypeByID(Record[0]);
3210 Type *FTy = flattenPointerTypes(FullFTy);
3211 if (!FTy)
3212 return error("Invalid record");
3213 if (isa<PointerType>(FTy))
3214 std::tie(FullFTy, FTy) = getPointerElementTypes(FullFTy);
3215
3216 if (!isa<FunctionType>(FTy))
3217 return error("Invalid type for value");
3218 auto CC = static_cast<CallingConv::ID>(Record[1]);
3219 if (CC & ~CallingConv::MaxID)
3220 return error("Invalid calling convention ID");
3221
3222 unsigned AddrSpace = TheModule->getDataLayout().getProgramAddressSpace();
3223 if (Record.size() > 16)
3224 AddrSpace = Record[16];
3225
3226 Function *Func =
3227 Function::Create(cast<FunctionType>(FTy), GlobalValue::ExternalLinkage,
3228 AddrSpace, Name, TheModule);
3229
3230 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-11~++20200309111110+2c36c23f347/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 3231, __PRETTY_FUNCTION__))
3231 "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-11~++20200309111110+2c36c23f347/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 3231, __PRETTY_FUNCTION__))
;
3232 FunctionTypes[Func] = cast<FunctionType>(FullFTy);
3233
3234 Func->setCallingConv(CC);
3235 bool isProto = Record[2];
3236 uint64_t RawLinkage = Record[3];
3237 Func->setLinkage(getDecodedLinkage(RawLinkage));
3238 Func->setAttributes(getAttributes(Record[4]));
3239
3240 // Upgrade any old-style byval without a type by propagating the argument's
3241 // pointee type. There should be no opaque pointers where the byval type is
3242 // implicit.
3243 for (unsigned i = 0; i != Func->arg_size(); ++i) {
3244 if (!Func->hasParamAttribute(i, Attribute::ByVal))
3245 continue;
3246
3247 Type *PTy = cast<FunctionType>(FullFTy)->getParamType(i);
3248 Func->removeParamAttr(i, Attribute::ByVal);
3249 Func->addParamAttr(i, Attribute::getWithByValType(
3250 Context, getPointerElementFlatType(PTy)));
3251 }
3252
3253 MaybeAlign Alignment;
3254 if (Error Err = parseAlignmentValue(Record[5], Alignment))
3255 return Err;
3256 Func->setAlignment(Alignment);
3257 if (Record[6]) {
3258 if (Record[6] - 1 >= SectionTable.size())
3259 return error("Invalid ID");
3260 Func->setSection(SectionTable[Record[6] - 1]);
3261 }
3262 // Local linkage must have default visibility.
3263 if (!Func->hasLocalLinkage())
3264 // FIXME: Change to an error if non-default in 4.0.
3265 Func->setVisibility(getDecodedVisibility(Record[7]));
3266 if (Record.size() > 8 && Record[8]) {
3267 if (Record[8] - 1 >= GCTable.size())
3268 return error("Invalid ID");
3269 Func->setGC(GCTable[Record[8] - 1]);
3270 }
3271 GlobalValue::UnnamedAddr UnnamedAddr = GlobalValue::UnnamedAddr::None;
3272 if (Record.size() > 9)
3273 UnnamedAddr = getDecodedUnnamedAddrType(Record[9]);
3274 Func->setUnnamedAddr(UnnamedAddr);
3275 if (Record.size() > 10 && Record[10] != 0)
3276 FunctionPrologues.push_back(std::make_pair(Func, Record[10] - 1));
3277
3278 if (Record.size() > 11)
3279 Func->setDLLStorageClass(getDecodedDLLStorageClass(Record[11]));
3280 else
3281 upgradeDLLImportExportLinkage(Func, RawLinkage);
3282
3283 if (Record.size() > 12) {
3284 if (unsigned ComdatID = Record[12]) {
3285 if (ComdatID > ComdatList.size())
3286 return error("Invalid function comdat ID");
3287 Func->setComdat(ComdatList[ComdatID - 1]);
3288 }
3289 } else if (hasImplicitComdat(RawLinkage)) {
3290 Func->setComdat(reinterpret_cast<Comdat *>(1));
3291 }
3292
3293 if (Record.size() > 13 && Record[13] != 0)
3294 FunctionPrefixes.push_back(std::make_pair(Func, Record[13] - 1));
3295
3296 if (Record.size() > 14 && Record[14] != 0)
3297 FunctionPersonalityFns.push_back(std::make_pair(Func, Record[14] - 1));
3298
3299 if (Record.size() > 15) {
3300 Func->setDSOLocal(getDecodedDSOLocal(Record[15]));
3301 }
3302 inferDSOLocal(Func);
3303
3304 // Record[16] is the address space number.
3305
3306 // Check whether we have enough values to read a partition name.
3307 if (Record.size() > 18)
3308 Func->setPartition(StringRef(Strtab.data() + Record[17], Record[18]));
3309
3310 Type *FullTy = PointerType::get(FullFTy, AddrSpace);
3311 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-11~++20200309111110+2c36c23f347/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 3312, __PRETTY_FUNCTION__))
3312 "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-11~++20200309111110+2c36c23f347/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 3312, __PRETTY_FUNCTION__))
;
3313 ValueList.push_back(Func, FullTy);
3314
3315 // If this is a function with a body, remember the prototype we are
3316 // creating now, so that we can match up the body with them later.
3317 if (!isProto) {
3318 Func->setIsMaterializable(true);
3319 FunctionsWithBodies.push_back(Func);
3320 DeferredFunctionInfo[Func] = 0;
3321 }
3322 return Error::success();
3323}
3324
3325Error BitcodeReader::parseGlobalIndirectSymbolRecord(
3326 unsigned BitCode, ArrayRef<uint64_t> Record) {
3327 // v1 ALIAS_OLD: [alias type, aliasee val#, linkage] (name in VST)
3328 // v1 ALIAS: [alias type, addrspace, aliasee val#, linkage, visibility,
3329 // dllstorageclass, threadlocal, unnamed_addr,
3330 // preemption specifier] (name in VST)
3331 // v1 IFUNC: [alias type, addrspace, aliasee val#, linkage,
3332 // visibility, dllstorageclass, threadlocal, unnamed_addr,
3333 // preemption specifier] (name in VST)
3334 // v2: [strtab_offset, strtab_size, v1]
3335 StringRef Name;
3336 std::tie(Name, Record) = readNameFromStrtab(Record);
3337
3338 bool NewRecord = BitCode != bitc::MODULE_CODE_ALIAS_OLD;
3339 if (Record.size() < (3 + (unsigned)NewRecord))
3340 return error("Invalid record");
3341 unsigned OpNum = 0;
3342 Type *FullTy = getFullyStructuredTypeByID(Record[OpNum++]);
3343 Type *Ty = flattenPointerTypes(FullTy);
3344 if (!Ty)
3345 return error("Invalid record");
3346
3347 unsigned AddrSpace;
3348 if (!NewRecord) {
3349 auto *PTy = dyn_cast<PointerType>(Ty);
3350 if (!PTy)
3351 return error("Invalid type for value");
3352 std::tie(FullTy, Ty) = getPointerElementTypes(FullTy);
3353 AddrSpace = PTy->getAddressSpace();
3354 } else {
3355 AddrSpace = Record[OpNum++];
3356 }
3357
3358 auto Val = Record[OpNum++];
3359 auto Linkage = Record[OpNum++];
3360 GlobalIndirectSymbol *NewGA;
3361 if (BitCode == bitc::MODULE_CODE_ALIAS ||
3362 BitCode == bitc::MODULE_CODE_ALIAS_OLD)
3363 NewGA = GlobalAlias::create(Ty, AddrSpace, getDecodedLinkage(Linkage), Name,
3364 TheModule);
3365 else
3366 NewGA = GlobalIFunc::create(Ty, AddrSpace, getDecodedLinkage(Linkage), Name,
3367 nullptr, TheModule);
3368
3369 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-11~++20200309111110+2c36c23f347/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 3370, __PRETTY_FUNCTION__))
3370 "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-11~++20200309111110+2c36c23f347/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 3370, __PRETTY_FUNCTION__))
;
3371 // Old bitcode files didn't have visibility field.
3372 // Local linkage must have default visibility.
3373 if (OpNum != Record.size()) {
3374 auto VisInd = OpNum++;
3375 if (!NewGA->hasLocalLinkage())
3376 // FIXME: Change to an error if non-default in 4.0.
3377 NewGA->setVisibility(getDecodedVisibility(Record[VisInd]));
3378 }
3379 if (BitCode == bitc::MODULE_CODE_ALIAS ||
3380 BitCode == bitc::MODULE_CODE_ALIAS_OLD) {
3381 if (OpNum != Record.size())
3382 NewGA->setDLLStorageClass(getDecodedDLLStorageClass(Record[OpNum++]));
3383 else
3384 upgradeDLLImportExportLinkage(NewGA, Linkage);
3385 if (OpNum != Record.size())
3386 NewGA->setThreadLocalMode(getDecodedThreadLocalMode(Record[OpNum++]));
3387 if (OpNum != Record.size())
3388 NewGA->setUnnamedAddr(getDecodedUnnamedAddrType(Record[OpNum++]));
3389 }
3390 if (OpNum != Record.size())
3391 NewGA->setDSOLocal(getDecodedDSOLocal(Record[OpNum++]));
3392 inferDSOLocal(NewGA);
3393
3394 // Check whether we have enough values to read a partition name.
3395 if (OpNum + 1 < Record.size()) {
3396 NewGA->setPartition(
3397 StringRef(Strtab.data() + Record[OpNum], Record[OpNum + 1]));
3398 OpNum += 2;
3399 }
3400
3401 FullTy = PointerType::get(FullTy, AddrSpace);
3402 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-11~++20200309111110+2c36c23f347/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 3403, __PRETTY_FUNCTION__))
3403 "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-11~++20200309111110+2c36c23f347/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 3403, __PRETTY_FUNCTION__))
;
3404 ValueList.push_back(NewGA, FullTy);
3405 IndirectSymbolInits.push_back(std::make_pair(NewGA, Val));
3406 return Error::success();
3407}
3408
3409Error BitcodeReader::parseModule(uint64_t ResumeBit,
3410 bool ShouldLazyLoadMetadata) {
3411 if (ResumeBit) {
3412 if (Error JumpFailed = Stream.JumpToBit(ResumeBit))
3413 return JumpFailed;
3414 } else if (Error Err = Stream.EnterSubBlock(bitc::MODULE_BLOCK_ID))
3415 return Err;
3416
3417 SmallVector<uint64_t, 64> Record;
3418
3419 // Read all the records for this module.
3420 while (true) {
3421 Expected<llvm::BitstreamEntry> MaybeEntry = Stream.advance();
3422 if (!MaybeEntry)
3423 return MaybeEntry.takeError();
3424 llvm::BitstreamEntry Entry = MaybeEntry.get();
3425
3426 switch (Entry.Kind) {
3427 case BitstreamEntry::Error:
3428 return error("Malformed block");
3429 case BitstreamEntry::EndBlock:
3430 return globalCleanup();
3431
3432 case BitstreamEntry::SubBlock:
3433 switch (Entry.ID) {
3434 default: // Skip unknown content.
3435 if (Error Err = Stream.SkipBlock())
3436 return Err;
3437 break;
3438 case bitc::BLOCKINFO_BLOCK_ID:
3439 if (readBlockInfo())
3440 return error("Malformed block");
3441 break;
3442 case bitc::PARAMATTR_BLOCK_ID:
3443 if (Error Err = parseAttributeBlock())
3444 return Err;
3445 break;
3446 case bitc::PARAMATTR_GROUP_BLOCK_ID:
3447 if (Error Err = parseAttributeGroupBlock())
3448 return Err;
3449 break;
3450 case bitc::TYPE_BLOCK_ID_NEW:
3451 if (Error Err = parseTypeTable())
3452 return Err;
3453 break;
3454 case bitc::VALUE_SYMTAB_BLOCK_ID:
3455 if (!SeenValueSymbolTable) {
3456 // Either this is an old form VST without function index and an
3457 // associated VST forward declaration record (which would have caused
3458 // the VST to be jumped to and parsed before it was encountered
3459 // normally in the stream), or there were no function blocks to
3460 // trigger an earlier parsing of the VST.
3461 assert(VSTOffset == 0 || FunctionsWithBodies.empty())((VSTOffset == 0 || FunctionsWithBodies.empty()) ? static_cast
<void> (0) : __assert_fail ("VSTOffset == 0 || FunctionsWithBodies.empty()"
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 3461, __PRETTY_FUNCTION__))
;
3462 if (Error Err = parseValueSymbolTable())
3463 return Err;
3464 SeenValueSymbolTable = true;
3465 } else {
3466 // We must have had a VST forward declaration record, which caused
3467 // the parser to jump to and parse the VST earlier.
3468 assert(VSTOffset > 0)((VSTOffset > 0) ? static_cast<void> (0) : __assert_fail
("VSTOffset > 0", "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 3468, __PRETTY_FUNCTION__))
;
3469 if (Error Err = Stream.SkipBlock())
3470 return Err;
3471 }
3472 break;
3473 case bitc::CONSTANTS_BLOCK_ID:
3474 if (Error Err = parseConstants())
3475 return Err;
3476 if (Error Err = resolveGlobalAndIndirectSymbolInits())
3477 return Err;
3478 break;
3479 case bitc::METADATA_BLOCK_ID:
3480 if (ShouldLazyLoadMetadata) {
3481 if (Error Err = rememberAndSkipMetadata())
3482 return Err;
3483 break;
3484 }
3485 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-11~++20200309111110+2c36c23f347/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 3485, __PRETTY_FUNCTION__))
;
3486 if (Error Err = MDLoader->parseModuleMetadata())
3487 return Err;
3488 break;
3489 case bitc::METADATA_KIND_BLOCK_ID:
3490 if (Error Err = MDLoader->parseMetadataKinds())
3491 return Err;
3492 break;
3493 case bitc::FUNCTION_BLOCK_ID:
3494 // If this is the first function body we've seen, reverse the
3495 // FunctionsWithBodies list.
3496 if (!SeenFirstFunctionBody) {
3497 std::reverse(FunctionsWithBodies.begin(), FunctionsWithBodies.end());
3498 if (Error Err = globalCleanup())
3499 return Err;
3500 SeenFirstFunctionBody = true;
3501 }
3502
3503 if (VSTOffset > 0) {
3504 // If we have a VST forward declaration record, make sure we
3505 // parse the VST now if we haven't already. It is needed to
3506 // set up the DeferredFunctionInfo vector for lazy reading.
3507 if (!SeenValueSymbolTable) {
3508 if (Error Err = BitcodeReader::parseValueSymbolTable(VSTOffset))
3509 return Err;
3510 SeenValueSymbolTable = true;
3511 // Fall through so that we record the NextUnreadBit below.
3512 // This is necessary in case we have an anonymous function that
3513 // is later materialized. Since it will not have a VST entry we
3514 // need to fall back to the lazy parse to find its offset.
3515 } else {
3516 // If we have a VST forward declaration record, but have already
3517 // parsed the VST (just above, when the first function body was
3518 // encountered here), then we are resuming the parse after
3519 // materializing functions. The ResumeBit points to the
3520 // start of the last function block recorded in the
3521 // DeferredFunctionInfo map. Skip it.
3522 if (Error Err = Stream.SkipBlock())
3523 return Err;
3524 continue;
3525 }
3526 }
3527
3528 // Support older bitcode files that did not have the function
3529 // index in the VST, nor a VST forward declaration record, as
3530 // well as anonymous functions that do not have VST entries.
3531 // Build the DeferredFunctionInfo vector on the fly.
3532 if (Error Err = rememberAndSkipFunctionBody())
3533 return Err;
3534
3535 // Suspend parsing when we reach the function bodies. Subsequent
3536 // materialization calls will resume it when necessary. If the bitcode
3537 // file is old, the symbol table will be at the end instead and will not
3538 // have been seen yet. In this case, just finish the parse now.
3539 if (SeenValueSymbolTable) {
3540 NextUnreadBit = Stream.GetCurrentBitNo();
3541 // After the VST has been parsed, we need to make sure intrinsic name
3542 // are auto-upgraded.
3543 return globalCleanup();
3544 }
3545 break;
3546 case bitc::USELIST_BLOCK_ID:
3547 if (Error Err = parseUseLists())
3548 return Err;
3549 break;
3550 case bitc::OPERAND_BUNDLE_TAGS_BLOCK_ID:
3551 if (Error Err = parseOperandBundleTags())
3552 return Err;
3553 break;
3554 case bitc::SYNC_SCOPE_NAMES_BLOCK_ID:
3555 if (Error Err = parseSyncScopeNames())
3556 return Err;
3557 break;
3558 }
3559 continue;
3560
3561 case BitstreamEntry::Record:
3562 // The interesting case.
3563 break;
3564 }
3565
3566 // Read a record.
3567 Expected<unsigned> MaybeBitCode = Stream.readRecord(Entry.ID, Record);
3568 if (!MaybeBitCode)
3569 return MaybeBitCode.takeError();
3570 switch (unsigned BitCode = MaybeBitCode.get()) {
3571 default: break; // Default behavior, ignore unknown content.
3572 case bitc::MODULE_CODE_VERSION: {
3573 Expected<unsigned> VersionOrErr = parseVersionRecord(Record);
3574 if (!VersionOrErr)
3575 return VersionOrErr.takeError();
3576 UseRelativeIDs = *VersionOrErr >= 1;
3577 break;
3578 }
3579 case bitc::MODULE_CODE_TRIPLE: { // TRIPLE: [strchr x N]
3580 std::string S;
3581 if (convertToString(Record, 0, S))
3582 return error("Invalid record");
3583 TheModule->setTargetTriple(S);
3584 break;
3585 }
3586 case bitc::MODULE_CODE_DATALAYOUT: { // DATALAYOUT: [strchr x N]
3587 std::string S;
3588 if (convertToString(Record, 0, S))
3589 return error("Invalid record");
3590 TheModule->setDataLayout(S);
3591 break;
3592 }
3593 case bitc::MODULE_CODE_ASM: { // ASM: [strchr x N]
3594 std::string S;
3595 if (convertToString(Record, 0, S))
3596 return error("Invalid record");
3597 TheModule->setModuleInlineAsm(S);
3598 break;
3599 }
3600 case bitc::MODULE_CODE_DEPLIB: { // DEPLIB: [strchr x N]
3601 // FIXME: Remove in 4.0.
3602 std::string S;
3603 if (convertToString(Record, 0, S))
3604 return error("Invalid record");
3605 // Ignore value.
3606 break;
3607 }
3608 case bitc::MODULE_CODE_SECTIONNAME: { // SECTIONNAME: [strchr x N]
3609 std::string S;
3610 if (convertToString(Record, 0, S))
3611 return error("Invalid record");
3612 SectionTable.push_back(S);
3613 break;
3614 }
3615 case bitc::MODULE_CODE_GCNAME: { // SECTIONNAME: [strchr x N]
3616 std::string S;
3617 if (convertToString(Record, 0, S))
3618 return error("Invalid record");
3619 GCTable.push_back(S);
3620 break;
3621 }
3622 case bitc::MODULE_CODE_COMDAT:
3623 if (Error Err = parseComdatRecord(Record))
3624 return Err;
3625 break;
3626 case bitc::MODULE_CODE_GLOBALVAR:
3627 if (Error Err = parseGlobalVarRecord(Record))
3628 return Err;
3629 break;
3630 case bitc::MODULE_CODE_FUNCTION:
3631 if (Error Err = parseFunctionRecord(Record))
3632 return Err;
3633 break;
3634 case bitc::MODULE_CODE_IFUNC:
3635 case bitc::MODULE_CODE_ALIAS:
3636 case bitc::MODULE_CODE_ALIAS_OLD:
3637 if (Error Err = parseGlobalIndirectSymbolRecord(BitCode, Record))
3638 return Err;
3639 break;
3640 /// MODULE_CODE_VSTOFFSET: [offset]
3641 case bitc::MODULE_CODE_VSTOFFSET:
3642 if (Record.size() < 1)
3643 return error("Invalid record");
3644 // Note that we subtract 1 here because the offset is relative to one word
3645 // before the start of the identification or module block, which was
3646 // historically always the start of the regular bitcode header.
3647 VSTOffset = Record[0] - 1;
3648 break;
3649 /// MODULE_CODE_SOURCE_FILENAME: [namechar x N]
3650 case bitc::MODULE_CODE_SOURCE_FILENAME:
3651 SmallString<128> ValueName;
3652 if (convertToString(Record, 0, ValueName))
3653 return error("Invalid record");
3654 TheModule->setSourceFileName(ValueName);
3655 break;
3656 }
3657 Record.clear();
3658
3659 // Upgrade data layout string.
3660 std::string DL = llvm::UpgradeDataLayoutString(
3661 TheModule->getDataLayoutStr(), TheModule->getTargetTriple());
3662 TheModule->setDataLayout(DL);
3663 }
3664}
3665
3666Error BitcodeReader::parseBitcodeInto(Module *M, bool ShouldLazyLoadMetadata,
3667 bool IsImporting) {
3668 TheModule = M;
3669 MDLoader = MetadataLoader(Stream, *M, ValueList, IsImporting,
3670 [&](unsigned ID) { return getTypeByID(ID); });
3671 return parseModule(0, ShouldLazyLoadMetadata);
3672}
3673
3674Error BitcodeReader::typeCheckLoadStoreInst(Type *ValType, Type *PtrType) {
3675 if (!isa<PointerType>(PtrType))
3676 return error("Load/Store operand is not a pointer type");
3677 Type *ElemType = cast<PointerType>(PtrType)->getElementType();
3678
3679 if (ValType && ValType != ElemType)
3680 return error("Explicit load/store type does not match pointee "
3681 "type of pointer operand");
3682 if (!PointerType::isLoadableOrStorableType(ElemType))
3683 return error("Cannot load/store from pointer");
3684 return Error::success();
3685}
3686
3687void BitcodeReader::propagateByValTypes(CallBase *CB,
3688 ArrayRef<Type *> ArgsFullTys) {
3689 for (unsigned i = 0; i != CB->arg_size(); ++i) {
3690 if (!CB->paramHasAttr(i, Attribute::ByVal))
3691 continue;
3692
3693 CB->removeParamAttr(i, Attribute::ByVal);
3694 CB->addParamAttr(
3695 i, Attribute::getWithByValType(
3696 Context, getPointerElementFlatType(ArgsFullTys[i])));
3697 }
3698}
3699
3700/// Lazily parse the specified function body block.
3701Error BitcodeReader::parseFunctionBody(Function *F) {
3702 if (Error Err = Stream.EnterSubBlock(bitc::FUNCTION_BLOCK_ID))
3703 return Err;
3704
3705 // Unexpected unresolved metadata when parsing function.
3706 if (MDLoader->hasFwdRefs())
3707 return error("Invalid function metadata: incoming forward references");
3708
3709 InstructionList.clear();
3710 unsigned ModuleValueListSize = ValueList.size();
3711 unsigned ModuleMDLoaderSize = MDLoader->size();
3712
3713 // Add all the function arguments to the value table.
3714 unsigned ArgNo = 0;
3715 FunctionType *FullFTy = FunctionTypes[F];
3716 for (Argument &I : F->args()) {
3717 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-11~++20200309111110+2c36c23f347/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 3718, __PRETTY_FUNCTION__))
3718 "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-11~++20200309111110+2c36c23f347/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 3718, __PRETTY_FUNCTION__))
;
3719 ValueList.push_back(&I, FullFTy->getParamType(ArgNo++));
3720 }
3721 unsigned NextValueNo = ValueList.size();
3722 BasicBlock *CurBB = nullptr;
3723 unsigned CurBBNo = 0;
3724
3725 DebugLoc LastLoc;
3726 auto getLastInstruction = [&]() -> Instruction * {
3727 if (CurBB && !CurBB->empty())
3728 return &CurBB->back();
3729 else if (CurBBNo && FunctionBBs[CurBBNo - 1] &&
3730 !FunctionBBs[CurBBNo - 1]->empty())
3731 return &FunctionBBs[CurBBNo - 1]->back();
3732 return nullptr;
3733 };
3734
3735 std::vector<OperandBundleDef> OperandBundles;
3736
3737 // Read all the records.
3738 SmallVector<uint64_t, 64> Record;
3739
3740 while (true) {
3741 Expected<llvm::BitstreamEntry> MaybeEntry = Stream.advance();
3742 if (!MaybeEntry)
3743 return MaybeEntry.takeError();
3744 llvm::BitstreamEntry Entry = MaybeEntry.get();
3745
3746 switch (Entry.Kind) {
3747 case BitstreamEntry::Error:
3748 return error("Malformed block");
3749 case BitstreamEntry::EndBlock:
3750 goto OutOfRecordLoop;
3751
3752 case BitstreamEntry::SubBlock:
3753 switch (Entry.ID) {
3754 default: // Skip unknown content.
3755 if (Error Err = Stream.SkipBlock())
3756 return Err;
3757 break;
3758 case bitc::CONSTANTS_BLOCK_ID:
3759 if (Error Err = parseConstants())
3760 return Err;
3761 NextValueNo = ValueList.size();
3762 break;
3763 case bitc::VALUE_SYMTAB_BLOCK_ID:
3764 if (Error Err = parseValueSymbolTable())
3765 return Err;
3766 break;
3767 case bitc::METADATA_ATTACHMENT_ID:
3768 if (Error Err = MDLoader->parseMetadataAttachment(*F, InstructionList))
3769 return Err;
3770 break;
3771 case bitc::METADATA_BLOCK_ID:
3772 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-11~++20200309111110+2c36c23f347/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 3773, __PRETTY_FUNCTION__))
3773 "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-11~++20200309111110+2c36c23f347/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 3773, __PRETTY_FUNCTION__))
;
3774 if (Error Err = MDLoader->parseFunctionMetadata())
3775 return Err;
3776 break;
3777 case bitc::USELIST_BLOCK_ID:
3778 if (Error Err = parseUseLists())
3779 return Err;
3780 break;
3781 }
3782 continue;
3783
3784 case BitstreamEntry::Record:
3785 // The interesting case.
3786 break;
3787 }
3788
3789 // Read a record.
3790 Record.clear();
3791 Instruction *I = nullptr;
3792 Type *FullTy = nullptr;
3793 Expected<unsigned> MaybeBitCode = Stream.readRecord(Entry.ID, Record);
3794 if (!MaybeBitCode)
3795 return MaybeBitCode.takeError();
3796 switch (unsigned BitCode = MaybeBitCode.get()) {
3797 default: // Default behavior: reject
3798 return error("Invalid value");
3799 case bitc::FUNC_CODE_DECLAREBLOCKS: { // DECLAREBLOCKS: [nblocks]
3800 if (Record.size() < 1 || Record[0] == 0)
3801 return error("Invalid record");
3802 // Create all the basic blocks for the function.
3803 FunctionBBs.resize(Record[0]);
3804
3805 // See if anything took the address of blocks in this function.
3806 auto BBFRI = BasicBlockFwdRefs.find(F);
3807 if (BBFRI == BasicBlockFwdRefs.end()) {
3808 for (unsigned i = 0, e = FunctionBBs.size(); i != e; ++i)
3809 FunctionBBs[i] = BasicBlock::Create(Context, "", F);
3810 } else {
3811 auto &BBRefs = BBFRI->second;
3812 // Check for invalid basic block references.
3813 if (BBRefs.size() > FunctionBBs.size())
3814 return error("Invalid ID");
3815 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-11~++20200309111110+2c36c23f347/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 3815, __PRETTY_FUNCTION__))
;
3816 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-11~++20200309111110+2c36c23f347/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 3816, __PRETTY_FUNCTION__))
;
3817 for (unsigned I = 0, E = FunctionBBs.size(), RE = BBRefs.size(); I != E;
3818 ++I)
3819 if (I < RE && BBRefs[I]) {
3820 BBRefs[I]->insertInto(F);
3821 FunctionBBs[I] = BBRefs[I];
3822 } else {
3823 FunctionBBs[I] = BasicBlock::Create(Context, "", F);
3824 }
3825
3826 // Erase from the table.
3827 BasicBlockFwdRefs.erase(BBFRI);
3828 }
3829
3830 CurBB = FunctionBBs[0];
3831 continue;
3832 }
3833
3834 case bitc::FUNC_CODE_DEBUG_LOC_AGAIN: // DEBUG_LOC_AGAIN
3835 // This record indicates that the last instruction is at the same
3836 // location as the previous instruction with a location.
3837 I = getLastInstruction();
3838
3839 if (!I)
3840 return error("Invalid record");
3841 I->setDebugLoc(LastLoc);
3842 I = nullptr;
3843 continue;
3844
3845 case bitc::FUNC_CODE_DEBUG_LOC: { // DEBUG_LOC: [line, col, scope, ia]
3846 I = getLastInstruction();
3847 if (!I || Record.size() < 4)
3848 return error("Invalid record");
3849
3850 unsigned Line = Record[0], Col = Record[1];
3851 unsigned ScopeID = Record[2], IAID = Record[3];
3852 bool isImplicitCode = Record.size() == 5 && Record[4];
3853
3854 MDNode *Scope = nullptr, *IA = nullptr;
3855 if (ScopeID) {
3856 Scope = dyn_cast_or_null<MDNode>(
3857 MDLoader->getMetadataFwdRefOrLoad(ScopeID - 1));
3858 if (!Scope)
3859 return error("Invalid record");
3860 }
3861 if (IAID) {
3862 IA = dyn_cast_or_null<MDNode>(
3863 MDLoader->getMetadataFwdRefOrLoad(IAID - 1));
3864 if (!IA)
3865 return error("Invalid record");
3866 }
3867 LastLoc = DebugLoc::get(Line, Col, Scope, IA, isImplicitCode);
3868 I->setDebugLoc(LastLoc);
3869 I = nullptr;
3870 continue;
3871 }
3872 case bitc::FUNC_CODE_INST_UNOP: { // UNOP: [opval, ty, opcode]
3873 unsigned OpNum = 0;
3874 Value *LHS;
3875 if (getValueTypePair(Record, OpNum, NextValueNo, LHS) ||
3876 OpNum+1 > Record.size())
3877 return error("Invalid record");
3878
3879 int Opc = getDecodedUnaryOpcode(Record[OpNum++], LHS->getType());
3880 if (Opc == -1)
3881 return error("Invalid record");
3882 I = UnaryOperator::Create((Instruction::UnaryOps)Opc, LHS);
3883 InstructionList.push_back(I);
3884 if (OpNum < Record.size()) {
3885 if (isa<FPMathOperator>(I)) {
3886 FastMathFlags FMF = getDecodedFastMathFlags(Record[OpNum]);
3887 if (FMF.any())
3888 I->setFastMathFlags(FMF);
3889 }
3890 }
3891 break;
3892 }
3893 case bitc::FUNC_CODE_INST_BINOP: { // BINOP: [opval, ty, opval, opcode]
3894 unsigned OpNum = 0;
3895 Value *LHS, *RHS;
3896 if (getValueTypePair(Record, OpNum, NextValueNo, LHS) ||
3897 popValue(Record, OpNum, NextValueNo, LHS->getType(), RHS) ||
3898 OpNum+1 > Record.size())
3899 return error("Invalid record");
3900
3901 int Opc = getDecodedBinaryOpcode(Record[OpNum++], LHS->getType());
3902 if (Opc == -1)
3903 return error("Invalid record");
3904 I = BinaryOperator::Create((Instruction::BinaryOps)Opc, LHS, RHS);
3905 InstructionList.push_back(I);
3906 if (OpNum < Record.size()) {
3907 if (Opc == Instruction::Add ||
3908 Opc == Instruction::Sub ||
3909 Opc == Instruction::Mul ||
3910 Opc == Instruction::Shl) {
3911 if (Record[OpNum] & (1 << bitc::OBO_NO_SIGNED_WRAP))
3912 cast<BinaryOperator>(I)->setHasNoSignedWrap(true);
3913 if (Record[OpNum] & (1 << bitc::OBO_NO_UNSIGNED_WRAP))
3914 cast<BinaryOperator>(I)->setHasNoUnsignedWrap(true);
3915 } else if (Opc == Instruction::SDiv ||
3916 Opc == Instruction::UDiv ||
3917 Opc == Instruction::LShr ||
3918 Opc == Instruction::AShr) {
3919 if (Record[OpNum] & (1 << bitc::PEO_EXACT))
3920 cast<BinaryOperator>(I)->setIsExact(true);
3921 } else if (isa<FPMathOperator>(I)) {
3922 FastMathFlags FMF = getDecodedFastMathFlags(Record[OpNum]);
3923 if (FMF.any())
3924 I->setFastMathFlags(FMF);
3925 }
3926
3927 }
3928 break;
3929 }
3930 case bitc::FUNC_CODE_INST_CAST: { // CAST: [opval, opty, destty, castopc]
3931 unsigned OpNum = 0;
3932 Value *Op;
3933 if (getValueTypePair(Record, OpNum, NextValueNo, Op) ||
3934 OpNum+2 != Record.size())
3935 return error("Invalid record");
3936
3937 FullTy = getFullyStructuredTypeByID(Record[OpNum]);
3938 Type *ResTy = flattenPointerTypes(FullTy);
3939 int Opc = getDecodedCastOpcode(Record[OpNum + 1]);
3940 if (Opc == -1 || !ResTy)
3941 return error("Invalid record");
3942 Instruction *Temp = nullptr;
3943 if ((I = UpgradeBitCastInst(Opc, Op, ResTy, Temp))) {
3944 if (Temp) {
3945 InstructionList.push_back(Temp);
3946 assert(CurBB && "No current BB?")((CurBB && "No current BB?") ? static_cast<void>
(0) : __assert_fail ("CurBB && \"No current BB?\"", "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 3946, __PRETTY_FUNCTION__))
;
3947 CurBB->getInstList().push_back(Temp);
3948 }
3949 } else {
3950 auto CastOp = (Instruction::CastOps)Opc;
3951 if (!CastInst::castIsValid(CastOp, Op, ResTy))
3952 return error("Invalid cast");
3953 I = CastInst::Create(CastOp, Op, ResTy);
3954 }
3955 InstructionList.push_back(I);
3956 break;
3957 }
3958 case bitc::FUNC_CODE_INST_INBOUNDS_GEP_OLD:
3959 case bitc::FUNC_CODE_INST_GEP_OLD:
3960 case bitc::FUNC_CODE_INST_GEP: { // GEP: type, [n x operands]
3961 unsigned OpNum = 0;
3962
3963 Type *Ty;
3964 bool InBounds;
3965
3966 if (BitCode == bitc::FUNC_CODE_INST_GEP) {
3967 InBounds = Record[OpNum++];
3968 FullTy = getFullyStructuredTypeByID(Record[OpNum++]);
3969 Ty = flattenPointerTypes(FullTy);
3970 } else {
3971 InBounds = BitCode == bitc::FUNC_CODE_INST_INBOUNDS_GEP_OLD;
3972 Ty = nullptr;
3973 }
3974
3975 Value *BasePtr;
3976 Type *FullBaseTy = nullptr;
3977 if (getValueTypePair(Record, OpNum, NextValueNo, BasePtr, &FullBaseTy))
3978 return error("Invalid record");
3979
3980 if (!Ty) {
3981 std::tie(FullTy, Ty) =
3982 getPointerElementTypes(FullBaseTy->getScalarType());
3983 } else if (Ty != getPointerElementFlatType(FullBaseTy->getScalarType()))
3984 return error(
3985 "Explicit gep type does not match pointee type of pointer operand");
3986
3987 SmallVector<Value*, 16> GEPIdx;
3988 while (OpNum != Record.size()) {
3989 Value *Op;
3990 if (getValueTypePair(Record, OpNum, NextValueNo, Op))
3991 return error("Invalid record");
3992 GEPIdx.push_back(Op);
3993 }
3994
3995 I = GetElementPtrInst::Create(Ty, BasePtr, GEPIdx);
3996 FullTy = GetElementPtrInst::getGEPReturnType(FullTy, I, GEPIdx);
3997
3998 InstructionList.push_back(I);
3999 if (InBounds)
4000 cast<GetElementPtrInst>(I)->setIsInBounds(true);
4001 break;
4002 }
4003
4004 case bitc::FUNC_CODE_INST_EXTRACTVAL: {
4005 // EXTRACTVAL: [opty, opval, n x indices]
4006 unsigned OpNum = 0;
4007 Value *Agg;
4008 if (getValueTypePair(Record, OpNum, NextValueNo, Agg, &FullTy))
4009 return error("Invalid record");
4010
4011 unsigned RecSize = Record.size();
4012 if (OpNum == RecSize)
4013 return error("EXTRACTVAL: Invalid instruction with 0 indices");
4014
4015 SmallVector<unsigned, 4> EXTRACTVALIdx;
4016 for (; OpNum != RecSize; ++OpNum) {
4017 bool IsArray = FullTy->isArrayTy();
4018 bool IsStruct = FullTy->isStructTy();
4019 uint64_t Index = Record[OpNum];
4020
4021 if (!IsStruct && !IsArray)
4022 return error("EXTRACTVAL: Invalid type");
4023 if ((unsigned)Index != Index)
4024 return error("Invalid value");
4025 if (IsStruct && Index >= FullTy->getStructNumElements())
4026 return error("EXTRACTVAL: Invalid struct index");
4027 if (IsArray && Index >= FullTy->getArrayNumElements())
4028 return error("EXTRACTVAL: Invalid array index");
4029 EXTRACTVALIdx.push_back((unsigned)Index);
4030
4031 if (IsStruct)
4032 FullTy = FullTy->getStructElementType(Index);
4033 else
4034 FullTy = FullTy->getArrayElementType();
4035 }
4036
4037 I = ExtractValueInst::Create(Agg, EXTRACTVALIdx);
4038 InstructionList.push_back(I);
4039 break;
4040 }
4041
4042 case bitc::FUNC_CODE_INST_INSERTVAL: {
4043 // INSERTVAL: [opty, opval, opty, opval, n x indices]
4044 unsigned OpNum = 0;
4045 Value *Agg;
4046 if (getValueTypePair(Record, OpNum, NextValueNo, Agg, &FullTy))
4047 return error("Invalid record");
4048 Value *Val;
4049 if (getValueTypePair(Record, OpNum, NextValueNo, Val))
4050 return error("Invalid record");
4051
4052 unsigned RecSize = Record.size();
4053 if (OpNum == RecSize)
4054 return error("INSERTVAL: Invalid instruction with 0 indices");
4055
4056 SmallVector<unsigned, 4> INSERTVALIdx;
4057 Type *CurTy = Agg->getType();
4058 for (; OpNum != RecSize; ++OpNum) {
4059 bool IsArray = CurTy->isArrayTy();
4060 bool IsStruct = CurTy->isStructTy();
4061 uint64_t Index = Record[OpNum];
4062
4063 if (!IsStruct && !IsArray)
4064 return error("INSERTVAL: Invalid type");
4065 if ((unsigned)Index != Index)
4066 return error("Invalid value");
4067 if (IsStruct && Index >= CurTy->getStructNumElements())
4068 return error("INSERTVAL: Invalid struct index");
4069 if (IsArray && Index >= CurTy->getArrayNumElements())
4070 return error("INSERTVAL: Invalid array index");
4071
4072 INSERTVALIdx.push_back((unsigned)Index);
4073 if (IsStruct)
4074 CurTy = CurTy->getStructElementType(Index);
4075 else
4076 CurTy = CurTy->getArrayElementType();
4077 }
4078
4079 if (CurTy != Val->getType())
4080 return error("Inserted value type doesn't match aggregate type");
4081
4082 I = InsertValueInst::Create(Agg, Val, INSERTVALIdx);
4083 InstructionList.push_back(I);
4084 break;
4085 }
4086
4087 case bitc::FUNC_CODE_INST_SELECT: { // SELECT: [opval, ty, opval, opval]
4088 // obsolete form of select
4089 // handles select i1 ... in old bitcode
4090 unsigned OpNum = 0;
4091 Value *TrueVal, *FalseVal, *Cond;
4092 if (getValueTypePair(Record, OpNum, NextValueNo, TrueVal, &FullTy) ||
4093 popValue(Record, OpNum, NextValueNo, TrueVal->getType(), FalseVal) ||
4094 popValue(Record, OpNum, NextValueNo, Type::getInt1Ty(Context), Cond))
4095 return error("Invalid record");
4096
4097 I = SelectInst::Create(Cond, TrueVal, FalseVal);
4098 InstructionList.push_back(I);
4099 break;
4100 }
4101
4102 case bitc::FUNC_CODE_INST_VSELECT: {// VSELECT: [ty,opval,opval,predty,pred]
4103 // new form of select
4104 // handles select i1 or select [N x i1]
4105 unsigned OpNum = 0;
4106 Value *TrueVal, *FalseVal, *Cond;
4107 if (getValueTypePair(Record, OpNum, NextValueNo, TrueVal, &FullTy) ||
4108 popValue(Record, OpNum, NextValueNo, TrueVal->getType(), FalseVal) ||
4109 getValueTypePair(Record, OpNum, NextValueNo, Cond))
4110 return error("Invalid record");
4111
4112 // select condition can be either i1 or [N x i1]
4113 if (VectorType* vector_type =
4114 dyn_cast<VectorType>(Cond->getType())) {
4115 // expect <n x i1>
4116 if (vector_type->getElementType() != Type::getInt1Ty(Context))
4117 return error("Invalid type for value");
4118 } else {
4119 // expect i1
4120 if (Cond->getType() != Type::getInt1Ty(Context))
4121 return error("Invalid type for value");
4122 }
4123
4124 I = SelectInst::Create(Cond, TrueVal, FalseVal);
4125 InstructionList.push_back(I);
4126 if (OpNum < Record.size() && isa<FPMathOperator>(I)) {
4127 FastMathFlags FMF = getDecodedFastMathFlags(Record[OpNum]);
4128 if (FMF.any())
4129 I->setFastMathFlags(FMF);
4130 }
4131 break;
4132 }
4133
4134 case bitc::FUNC_CODE_INST_EXTRACTELT: { // EXTRACTELT: [opty, opval, opval]
4135 unsigned OpNum = 0;
4136 Value *Vec, *Idx;
4137 if (getValueTypePair(Record, OpNum, NextValueNo, Vec, &FullTy) ||
4138 getValueTypePair(Record, OpNum, NextValueNo, Idx))
4139 return error("Invalid record");
4140 if (!Vec->getType()->isVectorTy())
4141 return error("Invalid type for value");
4142 I = ExtractElementInst::Create(Vec, Idx);
4143 FullTy = FullTy->getVectorElementType();
4144 InstructionList.push_back(I);
4145 break;
4146 }
4147
4148 case bitc::FUNC_CODE_INST_INSERTELT: { // INSERTELT: [ty, opval,opval,opval]
4149 unsigned OpNum = 0;
4150 Value *Vec, *Elt, *Idx;
4151 if (getValueTypePair(Record, OpNum, NextValueNo, Vec, &FullTy))
4152 return error("Invalid record");
4153 if (!Vec->getType()->isVectorTy())
4154 return error("Invalid type for value");
4155 if (popValue(Record, OpNum, NextValueNo,
4156 cast<VectorType>(Vec->getType())->getElementType(), Elt) ||
4157 getValueTypePair(Record, OpNum, NextValueNo, Idx))
4158 return error("Invalid record");
4159 I = InsertElementInst::Create(Vec, Elt, Idx);
4160 InstructionList.push_back(I);
4161 break;
4162 }
4163
4164 case bitc::FUNC_CODE_INST_SHUFFLEVEC: {// SHUFFLEVEC: [opval,ty,opval,opval]
4165 unsigned OpNum = 0;
4166 Value *Vec1, *Vec2, *Mask;
4167 if (getValueTypePair(Record, OpNum, NextValueNo, Vec1, &FullTy) ||
4168 popValue(Record, OpNum, NextValueNo, Vec1->getType(), Vec2))
4169 return error("Invalid record");
4170
4171 if (getValueTypePair(Record, OpNum, NextValueNo, Mask))
4172 return error("Invalid record");
4173 if (!Vec1->getType()->isVectorTy() || !Vec2->getType()->isVectorTy())
4174 return error("Invalid type for value");
4175
4176 I = new ShuffleVectorInst(Vec1, Vec2, Mask);
4177 FullTy = VectorType::get(FullTy->getVectorElementType(),
4178 Mask->getType()->getVectorElementCount());
4179 InstructionList.push_back(I);
4180 break;
4181 }
4182
4183 case bitc::FUNC_CODE_INST_CMP: // CMP: [opty, opval, opval, pred]
4184 // Old form of ICmp/FCmp returning bool
4185 // Existed to differentiate between icmp/fcmp and vicmp/vfcmp which were
4186 // both legal on vectors but had different behaviour.
4187 case bitc::FUNC_CODE_INST_CMP2: { // CMP2: [opty, opval, opval, pred]
4188 // FCmp/ICmp returning bool or vector of bool
4189
4190 unsigned OpNum = 0;
4191 Value *LHS, *RHS;
4192 if (getValueTypePair(Record, OpNum, NextValueNo, LHS) ||
4193 popValue(Record, OpNum, NextValueNo, LHS->getType(), RHS))
4194 return error("Invalid record");
4195
4196 if (OpNum >= Record.size())
4197 return error(
4198 "Invalid record: operand number exceeded available operands");
4199
4200 unsigned PredVal = Record[OpNum];
4201 bool IsFP = LHS->getType()->isFPOrFPVectorTy();
4202 FastMathFlags FMF;
4203 if (IsFP && Record.size() > OpNum+1)
4204 FMF = getDecodedFastMathFlags(Record[++OpNum]);
4205
4206 if (OpNum+1 != Record.size())
4207 return error("Invalid record");
4208
4209 if (LHS->getType()->isFPOrFPVectorTy())
4210 I = new FCmpInst((FCmpInst::Predicate)PredVal, LHS, RHS);
4211 else
4212 I = new ICmpInst((ICmpInst::Predicate)PredVal, LHS, RHS);
4213
4214 if (FMF.any())
4215 I->setFastMathFlags(FMF);
4216 InstructionList.push_back(I);
4217 break;
4218 }
4219
4220 case bitc::FUNC_CODE_INST_RET: // RET: [opty,opval<optional>]
4221 {
4222 unsigned Size = Record.size();
4223 if (Size == 0) {
4224 I = ReturnInst::Create(Context);
4225 InstructionList.push_back(I);
4226 break;
4227 }
4228
4229 unsigned OpNum = 0;
4230 Value *Op = nullptr;
4231 if (getValueTypePair(Record, OpNum, NextValueNo, Op))
4232 return error("Invalid record");
4233 if (OpNum != Record.size())
4234 return error("Invalid record");
4235
4236 I = ReturnInst::Create(Context, Op);
4237 InstructionList.push_back(I);
4238 break;
4239 }
4240 case bitc::FUNC_CODE_INST_BR: { // BR: [bb#, bb#, opval] or [bb#]
4241 if (Record.size() != 1 && Record.size() != 3)
4242 return error("Invalid record");
4243 BasicBlock *TrueDest = getBasicBlock(Record[0]);
4244 if (!TrueDest)
4245 return error("Invalid record");
4246
4247 if (Record.size() == 1) {
4248 I = BranchInst::Create(TrueDest);
4249 InstructionList.push_back(I);
4250 }
4251 else {
4252 BasicBlock *FalseDest = getBasicBlock(Record[1]);
4253 Value *Cond = getValue(Record, 2, NextValueNo,
4254 Type::getInt1Ty(Context));
4255 if (!FalseDest || !Cond)
4256 return error("Invalid record");
4257 I = BranchInst::Create(TrueDest, FalseDest, Cond);
4258 InstructionList.push_back(I);
4259 }
4260 break;
4261 }
4262 case bitc::FUNC_CODE_INST_CLEANUPRET: { // CLEANUPRET: [val] or [val,bb#]
4263 if (Record.size() != 1 && Record.size() != 2)
4264 return error("Invalid record");
4265 unsigned Idx = 0;
4266 Value *CleanupPad =
4267 getValue(Record, Idx++, NextValueNo, Type::getTokenTy(Context));
4268 if (!CleanupPad)
4269 return error("Invalid record");
4270 BasicBlock *UnwindDest = nullptr;
4271 if (Record.size() == 2) {
4272 UnwindDest = getBasicBlock(Record[Idx++]);
4273 if (!UnwindDest)
4274 return error("Invalid record");
4275 }
4276
4277 I = CleanupReturnInst::Create(CleanupPad, UnwindDest);
4278 InstructionList.push_back(I);
4279 break;
4280 }
4281 case bitc::FUNC_CODE_INST_CATCHRET: { // CATCHRET: [val,bb#]
4282 if (Record.size() != 2)
4283 return error("Invalid record");
4284 unsigned Idx = 0;
4285 Value *CatchPad =
4286 getValue(Record, Idx++, NextValueNo, Type::getTokenTy(Context));
4287 if (!CatchPad)
4288 return error("Invalid record");
4289 BasicBlock *BB = getBasicBlock(Record[Idx++]);
4290 if (!BB)
4291 return error("Invalid record");
4292
4293 I = CatchReturnInst::Create(CatchPad, BB);
4294 InstructionList.push_back(I);
4295 break;
4296 }
4297 case bitc::FUNC_CODE_INST_CATCHSWITCH: { // CATCHSWITCH: [tok,num,(bb)*,bb?]
4298 // We must have, at minimum, the outer scope and the number of arguments.
4299 if (Record.size() < 2)
4300 return error("Invalid record");
4301
4302 unsigned Idx = 0;
4303
4304 Value *ParentPad =
4305 getValue(Record, Idx++, NextValueNo, Type::getTokenTy(Context));
4306
4307 unsigned NumHandlers = Record[Idx++];
4308
4309 SmallVector<BasicBlock *, 2> Handlers;
4310 for (unsigned Op = 0; Op != NumHandlers; ++Op) {
4311 BasicBlock *BB = getBasicBlock(Record[Idx++]);
4312 if (!BB)
4313 return error("Invalid record");
4314 Handlers.push_back(BB);
4315 }
4316
4317 BasicBlock *UnwindDest = nullptr;
4318 if (Idx + 1 == Record.size()) {
4319 UnwindDest = getBasicBlock(Record[Idx++]);
4320 if (!UnwindDest)
4321 return error("Invalid record");
4322 }
4323
4324 if (Record.size() != Idx)
4325 return error("Invalid record");
4326
4327 auto *CatchSwitch =
4328 CatchSwitchInst::Create(ParentPad, UnwindDest, NumHandlers);
4329 for (BasicBlock *Handler : Handlers)
4330 CatchSwitch->addHandler(Handler);
4331 I = CatchSwitch;
4332 InstructionList.push_back(I);
4333 break;
4334 }
4335 case bitc::FUNC_CODE_INST_CATCHPAD:
4336 case bitc::FUNC_CODE_INST_CLEANUPPAD: { // [tok,num,(ty,val)*]
4337 // We must have, at minimum, the outer scope and the number of arguments.
4338 if (Record.size() < 2)
4339 return error("Invalid record");
4340
4341 unsigned Idx = 0;
4342
4343 Value *ParentPad =
4344 getValue(Record, Idx++, NextValueNo, Type::getTokenTy(Context));
4345
4346 unsigned NumArgOperands = Record[Idx++];
4347
4348 SmallVector<Value *, 2> Args;
4349 for (unsigned Op = 0; Op != NumArgOperands; ++Op) {
4350 Value *Val;
4351 if (getValueTypePair(Record, Idx, NextValueNo, Val))
4352 return error("Invalid record");
4353 Args.push_back(Val);
4354 }
4355
4356 if (Record.size() != Idx)
4357 return error("Invalid record");
4358
4359 if (BitCode == bitc::FUNC_CODE_INST_CLEANUPPAD)
4360 I = CleanupPadInst::Create(ParentPad, Args);
4361 else
4362 I = CatchPadInst::Create(ParentPad, Args);
4363 InstructionList.push_back(I);
4364 break;
4365 }
4366 case bitc::FUNC_CODE_INST_SWITCH: { // SWITCH: [opty, op0, op1, ...]
4367 // Check magic
4368 if ((Record[0] >> 16) == SWITCH_INST_MAGIC) {
4369 // "New" SwitchInst format with case ranges. The changes to write this
4370 // format were reverted but we still recognize bitcode that uses it.
4371 // Hopefully someday we will have support for case ranges and can use
4372 // this format again.
4373
4374 Type *OpTy = getTypeByID(Record[1]);
4375 unsigned ValueBitWidth = cast<IntegerType>(OpTy)->getBitWidth();
4376
4377 Value *Cond = getValue(Record, 2, NextValueNo, OpTy);
4378 BasicBlock *Default = getBasicBlock(Record[3]);
4379 if (!OpTy || !Cond || !Default)
4380 return error("Invalid record");
4381
4382 unsigned NumCases = Record[4];
4383
4384 SwitchInst *SI = SwitchInst::Create(Cond, Default, NumCases);
4385 InstructionList.push_back(SI);
4386
4387 unsigned CurIdx = 5;
4388 for (unsigned i = 0; i != NumCases; ++i) {
4389 SmallVector<ConstantInt*, 1> CaseVals;
4390 unsigned NumItems = Record[CurIdx++];
4391 for (unsigned ci = 0; ci != NumItems; ++ci) {
4392 bool isSingleNumber = Record[CurIdx++];
4393
4394 APInt Low;
4395 unsigned ActiveWords = 1;
4396 if (ValueBitWidth > 64)
4397 ActiveWords = Record[CurIdx++];
4398 Low = readWideAPInt(makeArrayRef(&Record[CurIdx], ActiveWords),
4399 ValueBitWidth);
4400 CurIdx += ActiveWords;
4401
4402 if (!isSingleNumber) {
4403 ActiveWords = 1;
4404 if (ValueBitWidth > 64)
4405 ActiveWords = Record[CurIdx++];
4406 APInt High = readWideAPInt(
4407 makeArrayRef(&Record[CurIdx], ActiveWords), ValueBitWidth);
4408 CurIdx += ActiveWords;
4409
4410 // FIXME: It is not clear whether values in the range should be
4411 // compared as signed or unsigned values. The partially
4412 // implemented changes that used this format in the past used
4413 // unsigned comparisons.
4414 for ( ; Low.ule(High); ++Low)
4415 CaseVals.push_back(ConstantInt::get(Context, Low));
4416 } else
4417 CaseVals.push_back(ConstantInt::get(Context, Low));
4418 }
4419 BasicBlock *DestBB = getBasicBlock(Record[CurIdx++]);
4420 for (SmallVector<ConstantInt*, 1>::iterator cvi = CaseVals.begin(),
4421 cve = CaseVals.end(); cvi != cve; ++cvi)
4422 SI->addCase(*cvi, DestBB);
4423 }
4424 I = SI;
4425 break;
4426 }
4427
4428 // Old SwitchInst format without case ranges.
4429
4430 if (Record.size() < 3 || (Record.size() & 1) == 0)
4431 return error("Invalid record");
4432 Type *OpTy = getTypeByID(Record[0]);
4433 Value *Cond = getValue(Record, 1, NextValueNo, OpTy);
4434 BasicBlock *Default = getBasicBlock(Record[2]);
4435 if (!OpTy || !Cond || !Default)
4436 return error("Invalid record");
4437 unsigned NumCases = (Record.size()-3)/2;
4438 SwitchInst *SI = SwitchInst::Create(Cond, Default, NumCases);
4439 InstructionList.push_back(SI);
4440 for (unsigned i = 0, e = NumCases; i != e; ++i) {
4441 ConstantInt *CaseVal =
4442 dyn_cast_or_null<ConstantInt>(getFnValueByID(Record[3+i*2], OpTy));
4443 BasicBlock *DestBB = getBasicBlock(Record[1+3+i*2]);
4444 if (!CaseVal || !DestBB) {
4445 delete SI;
4446 return error("Invalid record");
4447 }
4448 SI->addCase(CaseVal, DestBB);
4449 }
4450 I = SI;
4451 break;
4452 }
4453 case bitc::FUNC_CODE_INST_INDIRECTBR: { // INDIRECTBR: [opty, op0, op1, ...]
4454 if (Record.size() < 2)
4455 return error("Invalid record");
4456 Type *OpTy = getTypeByID(Record[0]);
4457 Value *Address = getValue(Record, 1, NextValueNo, OpTy);
4458 if (!OpTy || !Address)
4459 return error("Invalid record");
4460 unsigned NumDests = Record.size()-2;
4461 IndirectBrInst *IBI = IndirectBrInst::Create(Address, NumDests);
4462 InstructionList.push_back(IBI);
4463 for (unsigned i = 0, e = NumDests; i != e; ++i) {
4464 if (BasicBlock *DestBB = getBasicBlock(Record[2+i])) {
4465 IBI->addDestination(DestBB);
4466 } else {
4467 delete IBI;
4468 return error("Invalid record");
4469 }
4470 }
4471 I = IBI;
4472 break;
4473 }
4474
4475 case bitc::FUNC_CODE_INST_INVOKE: {
4476 // INVOKE: [attrs, cc, normBB, unwindBB, fnty, op0,op1,op2, ...]
4477 if (Record.size() < 4)
4478 return error("Invalid record");
4479 unsigned OpNum = 0;
4480 AttributeList PAL = getAttributes(Record[OpNum++]);
4481 unsigned CCInfo = Record[OpNum++];
4482 BasicBlock *NormalBB = getBasicBlock(Record[OpNum++]);
4483 BasicBlock *UnwindBB = getBasicBlock(Record[OpNum++]);
4484
4485 FunctionType *FTy = nullptr;
4486 FunctionType *FullFTy = nullptr;
4487 if ((CCInfo >> 13) & 1) {
4488 FullFTy =
4489 dyn_cast<FunctionType>(getFullyStructuredTypeByID(Record[OpNum++]));
4490 if (!FullFTy)
4491 return error("Explicit invoke type is not a function type");
4492 FTy = cast<FunctionType>(flattenPointerTypes(FullFTy));
4493 }
4494
4495 Value *Callee;
4496 if (getValueTypePair(Record, OpNum, NextValueNo, Callee, &FullTy))
4497 return error("Invalid record");
4498
4499 PointerType *CalleeTy = dyn_cast<PointerType>(Callee->getType());
4500 if (!CalleeTy)
4501 return error("Callee is not a pointer");
4502 if (!FTy) {
4503 FullFTy =
4504 dyn_cast<FunctionType>(cast<PointerType>(FullTy)->getElementType());
4505 if (!FullFTy)
4506 return error("Callee is not of pointer to function type");
4507 FTy = cast<FunctionType>(flattenPointerTypes(FullFTy));
4508 } else if (getPointerElementFlatType(FullTy) != FTy)
4509 return error("Explicit invoke type does not match pointee type of "
4510 "callee operand");
4511 if (Record.size() < FTy->getNumParams() + OpNum)
4512 return error("Insufficient operands to call");
4513
4514 SmallVector<Value*, 16> Ops;
4515 SmallVector<Type *, 16> ArgsFullTys;
4516 for (unsigned i = 0, e = FTy->getNumParams(); i != e; ++i, ++OpNum) {
4517 Ops.push_back(getValue(Record, OpNum, NextValueNo,
4518 FTy->getParamType(i)));
4519 ArgsFullTys.push_back(FullFTy->getParamType(i));
4520 if (!Ops.back())
4521 return error("Invalid record");
4522 }
4523
4524 if (!FTy->isVarArg()) {
4525 if (Record.size() != OpNum)
4526 return error("Invalid record");
4527 } else {
4528 // Read type/value pairs for varargs params.
4529 while (OpNum != Record.size()) {
4530 Value *Op;
4531 Type *FullTy;
4532 if (getValueTypePair(Record, OpNum, NextValueNo, Op, &FullTy))
4533 return error("Invalid record");
4534 Ops.push_back(Op);
4535 ArgsFullTys.push_back(FullTy);
4536 }
4537 }
4538
4539 I = InvokeInst::Create(FTy, Callee, NormalBB, UnwindBB, Ops,
4540 OperandBundles);
4541 FullTy = FullFTy->getReturnType();
4542 OperandBundles.clear();
4543 InstructionList.push_back(I);
4544 cast<InvokeInst>(I)->setCallingConv(
4545 static_cast<CallingConv::ID>(CallingConv::MaxID & CCInfo));
4546 cast<InvokeInst>(I)->setAttributes(PAL);
4547 propagateByValTypes(cast<CallBase>(I), ArgsFullTys);
4548
4549 break;
4550 }
4551 case bitc::FUNC_CODE_INST_RESUME: { // RESUME: [opval]
4552 unsigned Idx = 0;
4553 Value *Val = nullptr;
4554 if (getValueTypePair(Record, Idx, NextValueNo, Val))
4555 return error("Invalid record");
4556 I = ResumeInst::Create(Val);
4557 InstructionList.push_back(I);
4558 break;
4559 }
4560 case bitc::FUNC_CODE_INST_CALLBR: {
4561 // CALLBR: [attr, cc, norm, transfs, fty, fnid, args]
4562 unsigned OpNum = 0;
4563 AttributeList PAL = getAttributes(Record[OpNum++]);
4564 unsigned CCInfo = Record[OpNum++];
4565
4566 BasicBlock *DefaultDest = getBasicBlock(Record[OpNum++]);
4567 unsigned NumIndirectDests = Record[OpNum++];
4568 SmallVector<BasicBlock *, 16> IndirectDests;
4569 for (unsigned i = 0, e = NumIndirectDests; i != e; ++i)
4570 IndirectDests.push_back(getBasicBlock(Record[OpNum++]));
4571
4572 FunctionType *FTy = nullptr;
4573 FunctionType *FullFTy = nullptr;
4574 if ((CCInfo >> bitc::CALL_EXPLICIT_TYPE) & 1) {
4575 FullFTy =
4576 dyn_cast<FunctionType>(getFullyStructuredTypeByID(Record[OpNum++]));
4577 if (!FullFTy)
4578 return error("Explicit call type is not a function type");
4579 FTy = cast<FunctionType>(flattenPointerTypes(FullFTy));
4580 }
4581
4582 Value *Callee;
4583 if (getValueTypePair(Record, OpNum, NextValueNo, Callee, &FullTy))
4584 return error("Invalid record");
4585
4586 PointerType *OpTy = dyn_cast<PointerType>(Callee->getType());
4587 if (!OpTy)
4588 return error("Callee is not a pointer type");
4589 if (!FTy) {
4590 FullFTy =
4591 dyn_cast<FunctionType>(cast<PointerType>(FullTy)->getElementType());
4592 if (!FullFTy)
4593 return error("Callee is not of pointer to function type");
4594 FTy = cast<FunctionType>(flattenPointerTypes(FullFTy));
4595 } else if (getPointerElementFlatType(FullTy) != FTy)
4596 return error("Explicit call type does not match pointee type of "
4597 "callee operand");
4598 if (Record.size() < FTy->getNumParams() + OpNum)
4599 return error("Insufficient operands to call");
4600
4601 SmallVector<Value*, 16> Args;
4602 // Read the fixed params.
4603 for (unsigned i = 0, e = FTy->getNumParams(); i != e; ++i, ++OpNum) {
4604 if (FTy->getParamType(i)->isLabelTy())
4605 Args.push_back(getBasicBlock(Record[OpNum]));
4606 else
4607 Args.push_back(getValue(Record, OpNum, NextValueNo,
4608 FTy->getParamType(i)));
4609 if (!Args.back())
4610 return error("Invalid record");
4611 }
4612
4613 // Read type/value pairs for varargs params.
4614 if (!FTy->isVarArg()) {
4615 if (OpNum != Record.size())
4616 return error("Invalid record");
4617 } else {
4618 while (OpNum != Record.size()) {
4619 Value *Op;
4620 if (getValueTypePair(Record, OpNum, NextValueNo, Op))
4621 return error("Invalid record");
4622 Args.push_back(Op);
4623 }
4624 }
4625
4626 I = CallBrInst::Create(FTy, Callee, DefaultDest, IndirectDests, Args,
4627 OperandBundles);
4628 FullTy = FullFTy->getReturnType();
4629 OperandBundles.clear();
4630 InstructionList.push_back(I);
4631 cast<CallBrInst>(I)->setCallingConv(
4632 static_cast<CallingConv::ID>((0x7ff & CCInfo) >> bitc::CALL_CCONV));
4633 cast<CallBrInst>(I)->setAttributes(PAL);
4634 break;
4635 }
4636 case bitc::FUNC_CODE_INST_UNREACHABLE: // UNREACHABLE
4637 I = new UnreachableInst(Context);
4638 InstructionList.push_back(I);
4639 break;
4640 case bitc::FUNC_CODE_INST_PHI: { // PHI: [ty, val0,bb0, ...]
4641 if (Record.size() < 1)
4642 return error("Invalid record");
4643 // The first record specifies the type.
4644 FullTy = getFullyStructuredTypeByID(Record[0]);
4645 Type *Ty = flattenPointerTypes(FullTy);
4646 if (!Ty)
4647 return error("Invalid record");
4648
4649 // Phi arguments are pairs of records of [value, basic block].
4650 // There is an optional final record for fast-math-flags if this phi has a
4651 // floating-point type.
4652 size_t NumArgs = (Record.size() - 1) / 2;
4653 PHINode *PN = PHINode::Create(Ty, NumArgs);
4654 if ((Record.size() - 1) % 2 == 1 && !isa<FPMathOperator>(PN))
4655 return error("Invalid record");
4656 InstructionList.push_back(PN);
4657
4658 for (unsigned i = 0; i != NumArgs; i++) {
4659 Value *V;
4660 // With the new function encoding, it is possible that operands have
4661 // negative IDs (for forward references). Use a signed VBR
4662 // representation to keep the encoding small.
4663 if (UseRelativeIDs)
4664 V = getValueSigned(Record, i * 2 + 1, NextValueNo, Ty);
4665 else
4666 V = getValue(Record, i * 2 + 1, NextValueNo, Ty);
4667 BasicBlock *BB = getBasicBlock(Record[i * 2 + 2]);
4668 if (!V || !BB)
4669 return error("Invalid record");
4670 PN->addIncoming(V, BB);
4671 }
4672 I = PN;
4673
4674 // If there are an even number of records, the final record must be FMF.
4675 if (Record.size() % 2 == 0) {
4676 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-11~++20200309111110+2c36c23f347/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 4676, __PRETTY_FUNCTION__))
;
4677 FastMathFlags FMF = getDecodedFastMathFlags(Record[Record.size() - 1]);
4678 if (FMF.any())
4679 I->setFastMathFlags(FMF);
4680 }
4681
4682 break;
4683 }
4684
4685 case bitc::FUNC_CODE_INST_LANDINGPAD:
4686 case bitc::FUNC_CODE_INST_LANDINGPAD_OLD: {
4687 // LANDINGPAD: [ty, val, val, num, (id0,val0 ...)?]
4688 unsigned Idx = 0;
4689 if (BitCode == bitc::FUNC_CODE_INST_LANDINGPAD) {
4690 if (Record.size() < 3)
4691 return error("Invalid record");
4692 } else {
4693 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-11~++20200309111110+2c36c23f347/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 4693, __PRETTY_FUNCTION__))
;
4694 if (Record.size() < 4)
4695 return error("Invalid record");
4696 }
4697 FullTy = getFullyStructuredTypeByID(Record[Idx++]);
4698 Type *Ty = flattenPointerTypes(FullTy);
4699 if (!Ty)
4700 return error("Invalid record");
4701 if (BitCode == bitc::FUNC_CODE_INST_LANDINGPAD_OLD) {
4702 Value *PersFn = nullptr;
4703 if (getValueTypePair(Record, Idx, NextValueNo, PersFn))
4704 return error("Invalid record");
4705
4706 if (!F->hasPersonalityFn())
4707 F->setPersonalityFn(cast<Constant>(PersFn));
4708 else if (F->getPersonalityFn() != cast<Constant>(PersFn))
4709 return error("Personality function mismatch");
4710 }
4711
4712 bool IsCleanup = !!Record[Idx++];
4713 unsigned NumClauses = Record[Idx++];
4714 LandingPadInst *LP = LandingPadInst::Create(Ty, NumClauses);
4715 LP->setCleanup(IsCleanup);
4716 for (unsigned J = 0; J != NumClauses; ++J) {
4717 LandingPadInst::ClauseType CT =
4718 LandingPadInst::ClauseType(Record[Idx++]); (void)CT;
4719 Value *Val;
4720
4721 if (getValueTypePair(Record, Idx, NextValueNo, Val)) {
4722 delete LP;
4723 return error("Invalid record");
4724 }
4725
4726 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-11~++20200309111110+2c36c23f347/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 4728, __PRETTY_FUNCTION__))
4727 !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-11~++20200309111110+2c36c23f347/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 4728, __PRETTY_FUNCTION__))
4728 "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-11~++20200309111110+2c36c23f347/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 4728, __PRETTY_FUNCTION__))
;
4729 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-11~++20200309111110+2c36c23f347/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 4731, __PRETTY_FUNCTION__))
4730 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-11~++20200309111110+2c36c23f347/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 4731, __PRETTY_FUNCTION__))
4731 "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-11~++20200309111110+2c36c23f347/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 4731, __PRETTY_FUNCTION__))
;
4732 LP->addClause(cast<Constant>(Val));
4733 }
4734
4735 I = LP;
4736 InstructionList.push_back(I);
4737 break;
4738 }
4739
4740 case bitc::FUNC_CODE_INST_ALLOCA: { // ALLOCA: [instty, opty, op, align]
4741 if (Record.size() != 4)
4742 return error("Invalid record");
4743 uint64_t AlignRecord = Record[3];
4744 const uint64_t InAllocaMask = uint64_t(1) << 5;
4745 const uint64_t ExplicitTypeMask = uint64_t(1) << 6;
4746 const uint64_t SwiftErrorMask = uint64_t(1) << 7;
4747 const uint64_t FlagMask = InAllocaMask | ExplicitTypeMask |
4748 SwiftErrorMask;
4749 bool InAlloca = AlignRecord & InAllocaMask;
4750 bool SwiftError = AlignRecord & SwiftErrorMask;
4751 FullTy = getFullyStructuredTypeByID(Record[0]);
4752 Type *Ty = flattenPointerTypes(FullTy);
4753 if ((AlignRecord & ExplicitTypeMask) == 0) {
4754 auto *PTy = dyn_cast_or_null<PointerType>(Ty);
4755 if (!PTy)
4756 return error("Old-style alloca with a non-pointer type");
4757 std::tie(FullTy, Ty) = getPointerElementTypes(FullTy);
4758 }
4759 Type *OpTy = getTypeByID(Record[1]);
4760 Value *Size = getFnValueByID(Record[2], OpTy);
4761 MaybeAlign Align;
4762 if (Error Err = parseAlignmentValue(AlignRecord & ~FlagMask, Align)) {
4763 return Err;
4764 }
4765 if (!Ty || !Size)
4766 return error("Invalid record");
4767
4768 // FIXME: Make this an optional field.
4769 const DataLayout &DL = TheModule->getDataLayout();
4770 unsigned AS = DL.getAllocaAddrSpace();
4771
4772 AllocaInst *AI = new AllocaInst(Ty, AS, Size, Align);
4773 AI->setUsedWithInAlloca(InAlloca);
4774 AI->setSwiftError(SwiftError);
4775 I = AI;
4776 FullTy = PointerType::get(FullTy, AS);
4777 InstructionList.push_back(I);
4778 break;
4779 }
4780 case bitc::FUNC_CODE_INST_LOAD: { // LOAD: [opty, op, align, vol]
4781 unsigned OpNum = 0;
4782 Value *Op;
4783 if (getValueTypePair(Record, OpNum, NextValueNo, Op, &FullTy) ||
4784 (OpNum + 2 != Record.size() && OpNum + 3 != Record.size()))
4785 return error("Invalid record");
4786
4787 if (!isa<PointerType>(Op->getType()))
4788 return error("Load operand is not a pointer type");
4789
4790 Type *Ty = nullptr;
4791 if (OpNum + 3 == Record.size()) {
4792 FullTy = getFullyStructuredTypeByID(Record[OpNum++]);
4793 Ty = flattenPointerTypes(FullTy);
4794 } else
4795 std::tie(FullTy, Ty) = getPointerElementTypes(FullTy);
4796
4797 if (Error Err = typeCheckLoadStoreInst(Ty, Op->getType()))
4798 return Err;
4799
4800 MaybeAlign Align;
4801 if (Error Err = parseAlignmentValue(Record[OpNum], Align))
4802 return Err;
4803 I = new LoadInst(Ty, Op, "", Record[OpNum + 1], Align);
4804 InstructionList.push_back(I);
4805 break;
4806 }
4807 case bitc::FUNC_CODE_INST_LOADATOMIC: {
4808 // LOADATOMIC: [opty, op, align, vol, ordering, ssid]
4809 unsigned OpNum = 0;
4810 Value *Op;
4811 if (getValueTypePair(Record, OpNum, NextValueNo, Op, &FullTy) ||
4812 (OpNum + 4 != Record.size() && OpNum + 5 != Record.size()))
4813 return error("Invalid record");
4814
4815 if (!isa<PointerType>(Op->getType()))
4816 return error("Load operand is not a pointer type");
4817
4818 Type *Ty = nullptr;
4819 if (OpNum + 5 == Record.size()) {
4820 FullTy = getFullyStructuredTypeByID(Record[OpNum++]);
4821 Ty = flattenPointerTypes(FullTy);
4822 } else
4823 std::tie(FullTy, Ty) = getPointerElementTypes(FullTy);
4824
4825 if (Error Err = typeCheckLoadStoreInst(Ty, Op->getType()))
4826 return Err;
4827
4828 AtomicOrdering Ordering = getDecodedOrdering(Record[OpNum + 2]);
4829 if (Ordering == AtomicOrdering::NotAtomic ||
4830 Ordering == AtomicOrdering::Release ||
4831 Ordering == AtomicOrdering::AcquireRelease)
4832 return error("Invalid record");
4833 if (Ordering != AtomicOrdering::NotAtomic && Record[OpNum] == 0)
4834 return error("Invalid record");
4835 SyncScope::ID SSID = getDecodedSyncScopeID(Record[OpNum + 3]);
4836
4837 MaybeAlign Align;
4838 if (Error Err = parseAlignmentValue(Record[OpNum], Align))
4839 return Err;
4840 I = new LoadInst(Ty, Op, "", Record[OpNum + 1], Align, Ordering, SSID);
4841 InstructionList.push_back(I);
4842 break;
4843 }
4844 case bitc::FUNC_CODE_INST_STORE:
4845 case bitc::FUNC_CODE_INST_STORE_OLD: { // STORE2:[ptrty, ptr, val, align, vol]
4846 unsigned OpNum = 0;
4847 Value *Val, *Ptr;
4848 Type *FullTy;
4849 if (getValueTypePair(Record, OpNum, NextValueNo, Ptr, &FullTy) ||
4850 (BitCode == bitc::FUNC_CODE_INST_STORE
4851 ? getValueTypePair(Record, OpNum, NextValueNo, Val)
4852 : popValue(Record, OpNum, NextValueNo,
4853 getPointerElementFlatType(FullTy), Val)) ||
4854 OpNum + 2 != Record.size())
4855 return error("Invalid record");
4856
4857 if (Error Err = typeCheckLoadStoreInst(Val->getType(), Ptr->getType()))
4858 return Err;
4859 MaybeAlign Align;
4860 if (Error Err = parseAlignmentValue(Record[OpNum], Align))
4861 return Err;
4862 I = new StoreInst(Val, Ptr, Record[OpNum + 1], Align);
4863 InstructionList.push_back(I);
4864 break;
4865 }
4866 case bitc::FUNC_CODE_INST_STOREATOMIC:
4867 case bitc::FUNC_CODE_INST_STOREATOMIC_OLD: {
4868 // STOREATOMIC: [ptrty, ptr, val, align, vol, ordering, ssid]
4869 unsigned OpNum = 0;
4870 Value *Val, *Ptr;
4871 Type *FullTy;
4872 if (getValueTypePair(Record, OpNum, NextValueNo, Ptr, &FullTy) ||
4873 !isa<PointerType>(Ptr->getType()) ||
4874 (BitCode == bitc::FUNC_CODE_INST_STOREATOMIC
4875 ? getValueTypePair(Record, OpNum, NextValueNo, Val)
4876 : popValue(Record, OpNum, NextValueNo,
4877 getPointerElementFlatType(FullTy), Val)) ||
4878 OpNum + 4 != Record.size())
4879 return error("Invalid record");
4880
4881 if (Error Err = typeCheckLoadStoreInst(Val->getType(), Ptr->getType()))
4882 return Err;
4883 AtomicOrdering Ordering = getDecodedOrdering(Record[OpNum + 2]);
4884 if (Ordering == AtomicOrdering::NotAtomic ||
4885 Ordering == AtomicOrdering::Acquire ||
4886 Ordering == AtomicOrdering::AcquireRelease)
4887 return error("Invalid record");
4888 SyncScope::ID SSID = getDecodedSyncScopeID(Record[OpNum + 3]);
4889 if (Ordering != AtomicOrdering::NotAtomic && Record[OpNum] == 0)
4890 return error("Invalid record");
4891
4892 MaybeAlign Align;
4893 if (Error Err = parseAlignmentValue(Record[OpNum], Align))
4894 return Err;
4895 I = new StoreInst(Val, Ptr, Record[OpNum + 1], Align, Ordering, SSID);
4896 InstructionList.push_back(I);
4897 break;
4898 }
4899 case bitc::FUNC_CODE_INST_CMPXCHG_OLD:
4900 case bitc::FUNC_CODE_INST_CMPXCHG: {
4901 // CMPXCHG:[ptrty, ptr, cmp, new, vol, successordering, ssid,
4902 // failureordering?, isweak?]
4903 unsigned OpNum = 0;
4904 Value *Ptr, *Cmp, *New;
4905 if (getValueTypePair(Record, OpNum, NextValueNo, Ptr, &FullTy))
4906 return error("Invalid record");
4907
4908 if (!isa<PointerType>(Ptr->getType()))
4909 return error("Cmpxchg operand is not a pointer type");
4910
4911 if (BitCode == bitc::FUNC_CODE_INST_CMPXCHG) {
4912 if (getValueTypePair(Record, OpNum, NextValueNo, Cmp, &FullTy))
4913 return error("Invalid record");
4914 } else if (popValue(Record, OpNum, NextValueNo,
4915 getPointerElementFlatType(FullTy), Cmp))
4916 return error("Invalid record");
4917 else
4918 FullTy = cast<PointerType>(FullTy)->getElementType();
4919
4920 if (popValue(Record, OpNum, NextValueNo, Cmp->getType(), New) ||
4921 Record.size() < OpNum + 3 || Record.size() > OpNum + 5)
4922 return error("Invalid record");
4923
4924 AtomicOrdering SuccessOrdering = getDecodedOrdering(Record[OpNum + 1]);
4925 if (SuccessOrdering == AtomicOrdering::NotAtomic ||
4926 SuccessOrdering == AtomicOrdering::Unordered)
4927 return error("Invalid record");
4928 SyncScope::ID SSID = getDecodedSyncScopeID(Record[OpNum + 2]);
4929
4930 if (Error Err = typeCheckLoadStoreInst(Cmp->getType(), Ptr->getType()))
4931 return Err;
4932 AtomicOrdering FailureOrdering;
4933 if (Record.size() < 7)
4934 FailureOrdering =
4935 AtomicCmpXchgInst::getStrongestFailureOrdering(SuccessOrdering);
4936 else
4937 FailureOrdering = getDecodedOrdering(Record[OpNum + 3]);
4938
4939 I = new AtomicCmpXchgInst(Ptr, Cmp, New, SuccessOrdering, FailureOrdering,
4940 SSID);
4941 FullTy = StructType::get(Context, {FullTy, Type::getInt1Ty(Context)});
4942 cast<AtomicCmpXchgInst>(I)->setVolatile(Record[OpNum]);
4943
4944 if (Record.size() < 8) {
4945 // Before weak cmpxchgs existed, the instruction simply returned the
4946 // value loaded from memory, so bitcode files from that era will be
4947 // expecting the first component of a modern cmpxchg.
4948 CurBB->getInstList().push_back(I);
4949 I = ExtractValueInst::Create(I, 0);
4950 FullTy = cast<StructType>(FullTy)->getElementType(0);
4951 } else {
4952 cast<AtomicCmpXchgInst>(I)->setWeak(Record[OpNum+4]);
4953 }
4954
4955 InstructionList.push_back(I);
4956 break;
4957 }
4958 case bitc::FUNC_CODE_INST_ATOMICRMW: {
4959 // ATOMICRMW:[ptrty, ptr, val, op, vol, ordering, ssid]
4960 unsigned OpNum = 0;
4961 Value *Ptr, *Val;
4962 if (getValueTypePair(Record, OpNum, NextValueNo, Ptr, &FullTy) ||
4963 !isa<PointerType>(Ptr->getType()) ||
4964 popValue(Record, OpNum, NextValueNo,
4965 getPointerElementFlatType(FullTy), Val) ||
4966 OpNum + 4 != Record.size())
4967 return error("Invalid record");
4968 AtomicRMWInst::BinOp Operation = getDecodedRMWOperation(Record[OpNum]);
4969 if (Operation < AtomicRMWInst::FIRST_BINOP ||
4970 Operation > AtomicRMWInst::LAST_BINOP)
4971 return error("Invalid record");
4972 AtomicOrdering Ordering = getDecodedOrdering(Record[OpNum + 2]);
4973 if (Ordering == AtomicOrdering::NotAtomic ||
4974 Ordering == AtomicOrdering::Unordered)
4975 return error("Invalid record");
4976 SyncScope::ID SSID = getDecodedSyncScopeID(Record[OpNum + 3]);
4977 I = new AtomicRMWInst(Operation, Ptr, Val, Ordering, SSID);
4978 FullTy = getPointerElementFlatType(FullTy);
4979 cast<AtomicRMWInst>(I)->setVolatile(Record[OpNum+1]);
4980 InstructionList.push_back(I);
4981 break;
4982 }
4983 case bitc::FUNC_CODE_INST_FENCE: { // FENCE:[ordering, ssid]
4984 if (2 != Record.size())
4985 return error("Invalid record");
4986 AtomicOrdering Ordering = getDecodedOrdering(Record[0]);
4987 if (Ordering == AtomicOrdering::NotAtomic ||
4988 Ordering == AtomicOrdering::Unordered ||
4989 Ordering == AtomicOrdering::Monotonic)
4990 return error("Invalid record");
4991 SyncScope::ID SSID = getDecodedSyncScopeID(Record[1]);
4992 I = new FenceInst(Context, Ordering, SSID);
4993 InstructionList.push_back(I);
4994 break;
4995 }
4996 case bitc::FUNC_CODE_INST_CALL: {
4997 // CALL: [paramattrs, cc, fmf, fnty, fnid, arg0, arg1...]
4998 if (Record.size() < 3)
4999 return error("Invalid record");
5000
5001 unsigned OpNum = 0;
5002 AttributeList PAL = getAttributes(Record[OpNum++]);
5003 unsigned CCInfo = Record[OpNum++];
5004
5005 FastMathFlags FMF;
5006 if ((CCInfo >> bitc::CALL_FMF) & 1) {
5007 FMF = getDecodedFastMathFlags(Record[OpNum++]);
5008 if (!FMF.any())
5009 return error("Fast math flags indicator set for call with no FMF");
5010 }
5011
5012 FunctionType *FTy = nullptr;
5013 FunctionType *FullFTy = nullptr;
5014 if ((CCInfo >> bitc::CALL_EXPLICIT_TYPE) & 1) {
5015 FullFTy =
5016 dyn_cast<FunctionType>(getFullyStructuredTypeByID(Record[OpNum++]));
5017 if (!FullFTy)
5018 return error("Explicit call type is not a function type");
5019 FTy = cast<FunctionType>(flattenPointerTypes(FullFTy));
5020 }
5021
5022 Value *Callee;
5023 if (getValueTypePair(Record, OpNum, NextValueNo, Callee, &FullTy))
5024 return error("Invalid record");
5025
5026 PointerType *OpTy = dyn_cast<PointerType>(Callee->getType());
5027 if (!OpTy)
5028 return error("Callee is not a pointer type");
5029 if (!FTy) {
5030 FullFTy =
5031 dyn_cast<FunctionType>(cast<PointerType>(FullTy)->getElementType());
5032 if (!FullFTy)
5033 return error("Callee is not of pointer to function type");
5034 FTy = cast<FunctionType>(flattenPointerTypes(FullFTy));
5035 } else if (getPointerElementFlatType(FullTy) != FTy)
5036 return error("Explicit call type does not match pointee type of "
5037 "callee operand");
5038 if (Record.size() < FTy->getNumParams() + OpNum)
5039 return error("Insufficient operands to call");
5040
5041 SmallVector<Value*, 16> Args;
5042 SmallVector<Type*, 16> ArgsFullTys;
5043 // Read the fixed params.
5044 for (unsigned i = 0, e = FTy->getNumParams(); i != e; ++i, ++OpNum) {
5045 if (FTy->getParamType(i)->isLabelTy())
5046 Args.push_back(getBasicBlock(Record[OpNum]));
5047 else
5048 Args.push_back(getValue(Record, OpNum, NextValueNo,
5049 FTy->getParamType(i)));
5050 ArgsFullTys.push_back(FullFTy->getParamType(i));
5051 if (!Args.back())
5052 return error("Invalid record");
5053 }
5054
5055 // Read type/value pairs for varargs params.
5056 if (!FTy->isVarArg()) {
5057 if (OpNum != Record.size())
5058 return error("Invalid record");
5059 } else {
5060 while (OpNum != Record.size()) {
5061 Value *Op;
5062 Type *FullTy;
5063 if (getValueTypePair(Record, OpNum, NextValueNo, Op, &FullTy))
5064 return error("Invalid record");
5065 Args.push_back(Op);
5066 ArgsFullTys.push_back(FullTy);
5067 }
5068 }
5069
5070 I = CallInst::Create(FTy, Callee, Args, OperandBundles);
5071 FullTy = FullFTy->getReturnType();
5072 OperandBundles.clear();
5073 InstructionList.push_back(I);
5074 cast<CallInst>(I)->setCallingConv(
5075 static_cast<CallingConv::ID>((0x7ff & CCInfo) >> bitc::CALL_CCONV));
5076 CallInst::TailCallKind TCK = CallInst::TCK_None;
5077 if (CCInfo & 1 << bitc::CALL_TAIL)
5078 TCK = CallInst::TCK_Tail;
5079 if (CCInfo & (1 << bitc::CALL_MUSTTAIL))
5080 TCK = CallInst::TCK_MustTail;
5081 if (CCInfo & (1 << bitc::CALL_NOTAIL))
5082 TCK = CallInst::TCK_NoTail;
5083 cast<CallInst>(I)->setTailCallKind(TCK);
5084 cast<CallInst>(I)->setAttributes(PAL);
5085 propagateByValTypes(cast<CallBase>(I), ArgsFullTys);
5086 if (FMF.any()) {
5087 if (!isa<FPMathOperator>(I))
5088 return error("Fast-math-flags specified for call without "
5089 "floating-point scalar or vector return type");
5090 I->setFastMathFlags(FMF);
5091 }
5092 break;
5093 }
5094 case bitc::FUNC_CODE_INST_VAARG: { // VAARG: [valistty, valist, instty]
5095 if (Record.size() < 3)
5096 return error("Invalid record");
5097 Type *OpTy = getTypeByID(Record[0]);
5098 Value *Op = getValue(Record, 1, NextValueNo, OpTy);
5099 FullTy = getFullyStructuredTypeByID(Record[2]);
5100 Type *ResTy = flattenPointerTypes(FullTy);
5101 if (!OpTy || !Op || !ResTy)
5102 return error("Invalid record");
5103 I = new VAArgInst(Op, ResTy);
5104 InstructionList.push_back(I);
5105 break;
5106 }
5107
5108 case bitc::FUNC_CODE_OPERAND_BUNDLE: {
5109 // A call or an invoke can be optionally prefixed with some variable
5110 // number of operand bundle blocks. These blocks are read into
5111 // OperandBundles and consumed at the next call or invoke instruction.
5112
5113 if (Record.size() < 1 || Record[0] >= BundleTags.size())
5114 return error("Invalid record");
5115
5116 std::vector<Value *> Inputs;
5117
5118 unsigned OpNum = 1;
5119 while (OpNum != Record.size()) {
5120 Value *Op;
5121 if (getValueTypePair(Record, OpNum, NextValueNo, Op))
5122 return error("Invalid record");
5123 Inputs.push_back(Op);
5124 }
5125
5126 OperandBundles.emplace_back(BundleTags[Record[0]], std::move(Inputs));
5127 continue;
5128 }
5129
5130 case bitc::FUNC_CODE_INST_FREEZE: { // FREEZE: [opty,opval]
5131 unsigned OpNum = 0;
5132 Value *Op = nullptr;
5133 if (getValueTypePair(Record, OpNum, NextValueNo, Op, &FullTy))
5134 return error("Invalid record");
5135 if (OpNum != Record.size())
5136 return error("Invalid record");
5137
5138 I = new FreezeInst(Op);
5139 InstructionList.push_back(I);
5140 break;
5141 }
5142 }
5143
5144 // Add instruction to end of current BB. If there is no current BB, reject
5145 // this file.
5146 if (!CurBB) {
5147 I->deleteValue();
5148 return error("Invalid instruction with no BB");
5149 }
5150 if (!OperandBundles.empty()) {
5151 I->deleteValue();
5152 return error("Operand bundles found with no consumer");
5153 }
5154 CurBB->getInstList().push_back(I);
5155
5156 // If this was a terminator instruction, move to the next block.
5157 if (I->isTerminator()) {
5158 ++CurBBNo;
5159 CurBB = CurBBNo < FunctionBBs.size() ? FunctionBBs[CurBBNo] : nullptr;
5160 }
5161
5162 // Non-void values get registered in the value table for future use.
5163 if (!I->getType()->isVoidTy()) {
5164 if (!FullTy) {
5165 FullTy = I->getType();
5166 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-11~++20200309111110+2c36c23f347/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 5173, __PRETTY_FUNCTION__))
5167 !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-11~++20200309111110+2c36c23f347/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 5173, __PRETTY_FUNCTION__))
5168 !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-11~++20200309111110+2c36c23f347/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 5173, __PRETTY_FUNCTION__))
5169 (!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-11~++20200309111110+2c36c23f347/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 5173, __PRETTY_FUNCTION__))
5170 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-11~++20200309111110+2c36c23f347/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 5173, __PRETTY_FUNCTION__))
5171 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-11~++20200309111110+2c36c23f347/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 5173, __PRETTY_FUNCTION__))
5172 "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-11~++20200309111110+2c36c23f347/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 5173, __PRETTY_FUNCTION__))
5173 "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-11~++20200309111110+2c36c23f347/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 5173, __PRETTY_FUNCTION__))
;
5174 }
5175
5176 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-11~++20200309111110+2c36c23f347/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 5177, __PRETTY_FUNCTION__))
5177 "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-11~++20200309111110+2c36c23f347/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 5177, __PRETTY_FUNCTION__))
;
5178 ValueList.assignValue(I, NextValueNo++, FullTy);
5179 }
5180 }
5181
5182OutOfRecordLoop:
5183
5184 if (!OperandBundles.empty())
5185 return error("Operand bundles found with no consumer");
5186
5187 // Check the function list for unresolved values.
5188 if (Argument *A = dyn_cast<Argument>(ValueList.back())) {
5189 if (!A->getParent()) {
5190 // We found at least one unresolved value. Nuke them all to avoid leaks.
5191 for (unsigned i = ModuleValueListSize, e = ValueList.size(); i != e; ++i){
5192 if ((A = dyn_cast_or_null<Argument>(ValueList[i])) && !A->getParent()) {
5193 A->replaceAllUsesWith(UndefValue::get(A->getType()));
5194 delete A;
5195 }
5196 }
5197 return error("Never resolved value found in function");
5198 }
5199 }
5200
5201 // Unexpected unresolved metadata about to be dropped.
5202 if (MDLoader->hasFwdRefs())
5203 return error("Invalid function metadata: outgoing forward refs");
5204
5205 // Trim the value list down to the size it was before we parsed this function.
5206 ValueList.shrinkTo(ModuleValueListSize);
5207 MDLoader->shrinkTo(ModuleMDLoaderSize);
5208 std::vector<BasicBlock*>().swap(FunctionBBs);
5209 return Error::success();
5210}
5211
5212/// Find the function body in the bitcode stream
5213Error BitcodeReader::findFunctionInStream(
5214 Function *F,
5215 DenseMap<Function *, uint64_t>::iterator DeferredFunctionInfoIterator) {
5216 while (DeferredFunctionInfoIterator->second == 0) {
5217 // This is the fallback handling for the old format bitcode that
5218 // didn't contain the function index in the VST, or when we have
5219 // an anonymous function which would not have a VST entry.
5220 // Assert that we have one of those two cases.
5221 assert(VSTOffset == 0 || !F->hasName())((VSTOffset == 0 || !F->hasName()) ? static_cast<void>
(0) : __assert_fail ("VSTOffset == 0 || !F->hasName()", "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 5221, __PRETTY_FUNCTION__))
;
5222 // Parse the next body in the stream and set its position in the
5223 // DeferredFunctionInfo map.
5224 if (Error Err = rememberAndSkipFunctionBodies())
5225 return Err;
5226 }
5227 return Error::success();
5228}
5229
5230SyncScope::ID BitcodeReader::getDecodedSyncScopeID(unsigned Val) {
5231 if (Val == SyncScope::SingleThread || Val == SyncScope::System)
5232 return SyncScope::ID(Val);
5233 if (Val >= SSIDs.size())
5234 return SyncScope::System; // Map unknown synchronization scopes to system.
5235 return SSIDs[Val];
5236}
5237
5238//===----------------------------------------------------------------------===//
5239// GVMaterializer implementation
5240//===----------------------------------------------------------------------===//
5241
5242Error BitcodeReader::materialize(GlobalValue *GV) {
5243 Function *F = dyn_cast<Function>(GV);
5244 // If it's not a function or is already material, ignore the request.
5245 if (!F || !F->isMaterializable())
5246 return Error::success();
5247
5248 DenseMap<Function*, uint64_t>::iterator DFII = DeferredFunctionInfo.find(F);
5249 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-11~++20200309111110+2c36c23f347/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 5249, __PRETTY_FUNCTION__))
;
5250 // If its position is recorded as 0, its body is somewhere in the stream
5251 // but we haven't seen it yet.
5252 if (DFII->second == 0)
5253 if (Error Err = findFunctionInStream(F, DFII))
5254 return Err;
5255
5256 // Materialize metadata before parsing any function bodies.
5257 if (Error Err = materializeMetadata())
5258 return Err;
5259
5260 // Move the bit stream to the saved position of the deferred function body.
5261 if (Error JumpFailed = Stream.JumpToBit(DFII->second))
5262 return JumpFailed;
5263 if (Error Err = parseFunctionBody(F))
5264 return Err;
5265 F->setIsMaterializable(false);
5266
5267 if (StripDebugInfo)
5268 stripDebugInfo(*F);
5269
5270 // Upgrade any old intrinsic calls in the function.
5271 for (auto &I : UpgradedIntrinsics) {
5272 for (auto UI = I.first->materialized_user_begin(), UE = I.first->user_end();
5273 UI != UE;) {
5274 User *U = *UI;
5275 ++UI;
5276 if (CallInst *CI = dyn_cast<CallInst>(U))
5277 UpgradeIntrinsicCall(CI, I.second);
5278 }
5279 }
5280
5281 // Update calls to the remangled intrinsics
5282 for (auto &I : RemangledIntrinsics)
5283 for (auto UI = I.first->materialized_user_begin(), UE = I.first->user_end();
5284 UI != UE;)
5285 // Don't expect any other users than call sites
5286 CallSite(*UI++).setCalledFunction(I.second);
5287
5288 // Finish fn->subprogram upgrade for materialized functions.
5289 if (DISubprogram *SP = MDLoader->lookupSubprogramForFunction(F))
5290 F->setSubprogram(SP);
5291
5292 // Check if the TBAA Metadata are valid, otherwise we will need to strip them.
5293 if (!MDLoader->isStrippingTBAA()) {
5294 for (auto &I : instructions(F)) {
5295 MDNode *TBAA = I.getMetadata(LLVMContext::MD_tbaa);
5296 if (!TBAA || TBAAVerifyHelper.visitTBAAMetadata(I, TBAA))
5297 continue;
5298 MDLoader->setStripTBAA(true);
5299 stripTBAA(F->getParent());
5300 }
5301 }
5302
5303 // Bring in any functions that this function forward-referenced via
5304 // blockaddresses.
5305 return materializeForwardReferencedFunctions();
5306}
5307
5308Error BitcodeReader::materializeModule() {
5309 if (Error Err = materializeMetadata())
5310 return Err;
5311
5312 // Promise to materialize all forward references.
5313 WillMaterializeAllForwardRefs = true;
5314
5315 // Iterate over the module, deserializing any functions that are still on
5316 // disk.
5317 for (Function &F : *TheModule) {
5318 if (Error Err = materialize(&F))
5319 return Err;
5320 }
5321 // At this point, if there are any function bodies, parse the rest of
5322 // the bits in the module past the last function block we have recorded
5323 // through either lazy scanning or the VST.
5324 if (LastFunctionBlockBit || NextUnreadBit)
5325 if (Error Err = parseModule(LastFunctionBlockBit > NextUnreadBit
5326 ? LastFunctionBlockBit
5327 : NextUnreadBit))
5328 return Err;
5329
5330 // Check that all block address forward references got resolved (as we
5331 // promised above).
5332 if (!BasicBlockFwdRefs.empty())
5333 return error("Never resolved function from blockaddress");
5334
5335 // Upgrade any intrinsic calls that slipped through (should not happen!) and
5336 // delete the old functions to clean up. We can't do this unless the entire
5337 // module is materialized because there could always be another function body
5338 // with calls to the old function.
5339 for (auto &I : UpgradedIntrinsics) {
5340 for (auto *U : I.first->users()) {
5341 if (CallInst *CI = dyn_cast<CallInst>(U))
5342 UpgradeIntrinsicCall(CI, I.second);
5343 }
5344 if (!I.first->use_empty())
5345 I.first->replaceAllUsesWith(I.second);
5346 I.first->eraseFromParent();
5347 }
5348 UpgradedIntrinsics.clear();
5349 // Do the same for remangled intrinsics
5350 for (auto &I : RemangledIntrinsics) {
5351 I.first->replaceAllUsesWith(I.second);
5352 I.first->eraseFromParent();
5353 }
5354 RemangledIntrinsics.clear();
5355
5356 UpgradeDebugInfo(*TheModule);
5357
5358 UpgradeModuleFlags(*TheModule);
5359
5360 UpgradeARCRuntime(*TheModule);
5361
5362 return Error::success();
5363}
5364
5365std::vector<StructType *> BitcodeReader::getIdentifiedStructTypes() const {
5366 return IdentifiedStructTypes;
5367}
5368
5369ModuleSummaryIndexBitcodeReader::ModuleSummaryIndexBitcodeReader(
5370 BitstreamCursor Cursor, StringRef Strtab, ModuleSummaryIndex &TheIndex,
5371 StringRef ModulePath, unsigned ModuleId)
5372 : BitcodeReaderBase(std::move(Cursor), Strtab), TheIndex(TheIndex),
5373 ModulePath(ModulePath), ModuleId(ModuleId) {}
5374
5375void ModuleSummaryIndexBitcodeReader::addThisModule() {
5376 TheIndex.addModule(ModulePath, ModuleId);
5377}
5378
5379ModuleSummaryIndex::ModuleInfo *
5380ModuleSummaryIndexBitcodeReader::getThisModule() {
5381 return TheIndex.getModule(ModulePath);
5382}
5383
5384std::pair<ValueInfo, GlobalValue::GUID>
5385ModuleSummaryIndexBitcodeReader::getValueInfoFromValueId(unsigned ValueId) {
5386 auto VGI = ValueIdToValueInfoMap[ValueId];
5387 assert(VGI.first)((VGI.first) ? static_cast<void> (0) : __assert_fail ("VGI.first"
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 5387, __PRETTY_FUNCTION__))
;
5388 return VGI;
5389}
5390
5391void ModuleSummaryIndexBitcodeReader::setValueGUID(
5392 uint64_t ValueID, StringRef ValueName, GlobalValue::LinkageTypes Linkage,
5393 StringRef SourceFileName) {
5394 std::string GlobalId =
5395 GlobalValue::getGlobalIdentifier(ValueName, Linkage, SourceFileName);
5396 auto ValueGUID = GlobalValue::getGUID(GlobalId);
5397 auto OriginalNameID = ValueGUID;
5398 if (GlobalValue::isLocalLinkage(Linkage))
5399 OriginalNameID = GlobalValue::getGUID(ValueName);
5400 if (PrintSummaryGUIDs)
5401 dbgs() << "GUID " << ValueGUID << "(" << OriginalNameID << ") is "
5402 << ValueName << "\n";
5403
5404 // UseStrtab is false for legacy summary formats and value names are
5405 // created on stack. In that case we save the name in a string saver in
5406 // the index so that the value name can be recorded.
5407 ValueIdToValueInfoMap[ValueID] = std::make_pair(
5408 TheIndex.getOrInsertValueInfo(
5409 ValueGUID,
5410 UseStrtab ? ValueName : TheIndex.saveString(ValueName)),
5411 OriginalNameID);
5412}
5413
5414// Specialized value symbol table parser used when reading module index
5415// blocks where we don't actually create global values. The parsed information
5416// is saved in the bitcode reader for use when later parsing summaries.
5417Error ModuleSummaryIndexBitcodeReader::parseValueSymbolTable(
5418 uint64_t Offset,
5419 DenseMap<unsigned, GlobalValue::LinkageTypes> &ValueIdToLinkageMap) {
5420 // With a strtab the VST is not required to parse the summary.
5421 if (UseStrtab)
5422 return Error::success();
5423
5424 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-11~++20200309111110+2c36c23f347/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 5424, __PRETTY_FUNCTION__))
;
5425 Expected<uint64_t> MaybeCurrentBit = jumpToValueSymbolTable(Offset, Stream);
5426 if (!MaybeCurrentBit)
5427 return MaybeCurrentBit.takeError();
5428 uint64_t CurrentBit = MaybeCurrentBit.get();
5429
5430 if (Error Err = Stream.EnterSubBlock(bitc::VALUE_SYMTAB_BLOCK_ID))
5431 return Err;
5432
5433 SmallVector<uint64_t, 64> Record;
5434
5435 // Read all the records for this value table.
5436 SmallString<128> ValueName;
5437
5438 while (true) {
5439 Expected<BitstreamEntry> MaybeEntry = Stream.advanceSkippingSubblocks();
5440 if (!MaybeEntry)
5441 return MaybeEntry.takeError();
5442 BitstreamEntry Entry = MaybeEntry.get();
5443
5444 switch (Entry.Kind) {
5445 case BitstreamEntry::SubBlock: // Handled for us already.
5446 case BitstreamEntry::Error:
5447 return error("Malformed block");
5448 case BitstreamEntry::EndBlock:
5449 // Done parsing VST, jump back to wherever we came from.
5450 if (Error JumpFailed = Stream.JumpToBit(CurrentBit))
5451 return JumpFailed;
5452 return Error::success();
5453 case BitstreamEntry::Record:
5454 // The interesting case.
5455 break;
5456 }
5457
5458 // Read a record.
5459 Record.clear();
5460 Expected<unsigned> MaybeRecord = Stream.readRecord(Entry.ID, Record);
5461 if (!MaybeRecord)
5462 return MaybeRecord.takeError();
5463 switch (MaybeRecord.get()) {
5464 default: // Default behavior: ignore (e.g. VST_CODE_BBENTRY records).
5465 break;
5466 case bitc::VST_CODE_ENTRY: { // VST_CODE_ENTRY: [valueid, namechar x N]
5467 if (convertToString(Record, 1, ValueName))
5468 return error("Invalid record");
5469 unsigned ValueID = Record[0];
5470 assert(!SourceFileName.empty())((!SourceFileName.empty()) ? static_cast<void> (0) : __assert_fail
("!SourceFileName.empty()", "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 5470, __PRETTY_FUNCTION__))
;
5471 auto VLI = ValueIdToLinkageMap.find(ValueID);
5472 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-11~++20200309111110+2c36c23f347/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 5473, __PRETTY_FUNCTION__))
5473 "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-11~++20200309111110+2c36c23f347/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 5473, __PRETTY_FUNCTION__))
;
5474 auto Linkage = VLI->second;
5475 setValueGUID(ValueID, ValueName, Linkage, SourceFileName);
5476 ValueName.clear();
5477 break;
5478 }
5479 case bitc::VST_CODE_FNENTRY: {
5480 // VST_CODE_FNENTRY: [valueid, offset, namechar x N]
5481 if (convertToString(Record, 2, ValueName))
5482 return error("Invalid record");
5483 unsigned ValueID = Record[0];
5484 assert(!SourceFileName.empty())((!SourceFileName.empty()) ? static_cast<void> (0) : __assert_fail
("!SourceFileName.empty()", "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 5484, __PRETTY_FUNCTION__))
;
5485 auto VLI = ValueIdToLinkageMap.find(ValueID);
5486 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-11~++20200309111110+2c36c23f347/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 5487, __PRETTY_FUNCTION__))
5487 "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-11~++20200309111110+2c36c23f347/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 5487, __PRETTY_FUNCTION__))
;
5488 auto Linkage = VLI->second;
5489 setValueGUID(ValueID, ValueName, Linkage, SourceFileName);
5490 ValueName.clear();
5491 break;
5492 }
5493 case bitc::VST_CODE_COMBINED_ENTRY: {
5494 // VST_CODE_COMBINED_ENTRY: [valueid, refguid]
5495 unsigned ValueID = Record[0];
5496 GlobalValue::GUID RefGUID = Record[1];
5497 // The "original name", which is the second value of the pair will be
5498 // overriden later by a FS_COMBINED_ORIGINAL_NAME in the combined index.
5499 ValueIdToValueInfoMap[ValueID] =
5500 std::make_pair(TheIndex.getOrInsertValueInfo(RefGUID), RefGUID);
5501 break;
5502 }
5503 }
5504 }
5505}
5506
5507// Parse just the blocks needed for building the index out of the module.
5508// At the end of this routine the module Index is populated with a map
5509// from global value id to GlobalValueSummary objects.
5510Error ModuleSummaryIndexBitcodeReader::parseModule() {
5511 if (Error Err = Stream.EnterSubBlock(bitc::MODULE_BLOCK_ID))
5512 return Err;
5513
5514 SmallVector<uint64_t, 64> Record;
5515 DenseMap<unsigned, GlobalValue::LinkageTypes> ValueIdToLinkageMap;
5516 unsigned ValueId = 0;
5517
5518 // Read the index for this module.
5519 while (true) {
5520 Expected<llvm::BitstreamEntry> MaybeEntry = Stream.advance();
5521 if (!MaybeEntry)
5522 return MaybeEntry.takeError();
5523 llvm::BitstreamEntry Entry = MaybeEntry.get();
5524
5525 switch (Entry.Kind) {
5526 case BitstreamEntry::Error:
5527 return error("Malformed block");
5528 case BitstreamEntry::EndBlock:
5529 return Error::success();
5530
5531 case BitstreamEntry::SubBlock:
5532 switch (Entry.ID) {
5533 default: // Skip unknown content.
5534 if (Error Err = Stream.SkipBlock())
5535 return Err;
5536 break;
5537 case bitc::BLOCKINFO_BLOCK_ID:
5538 // Need to parse these to get abbrev ids (e.g. for VST)
5539 if (readBlockInfo())
5540 return error("Malformed block");
5541 break;
5542 case bitc::VALUE_SYMTAB_BLOCK_ID:
5543 // Should have been parsed earlier via VSTOffset, unless there
5544 // is no summary section.
5545 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-11~++20200309111110+2c36c23f347/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 5547, __PRETTY_FUNCTION__))
5546 !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-11~++20200309111110+2c36c23f347/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 5547, __PRETTY_FUNCTION__))
5547 "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-11~++20200309111110+2c36c23f347/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 5547, __PRETTY_FUNCTION__))
;
5548 if (Error Err = Stream.SkipBlock())
5549 return Err;
5550 break;
5551 case bitc::GLOBALVAL_SUMMARY_BLOCK_ID:
5552 case bitc::FULL_LTO_GLOBALVAL_SUMMARY_BLOCK_ID:
5553 // Add the module if it is a per-module index (has a source file name).
5554 if (!SourceFileName.empty())
5555 addThisModule();
5556 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-11~++20200309111110+2c36c23f347/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 5557, __PRETTY_FUNCTION__))
5557 "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-11~++20200309111110+2c36c23f347/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 5557, __PRETTY_FUNCTION__))
;
5558 // We might not have a VST if there were no values in the
5559 // summary. An empty summary block generated when we are
5560 // performing ThinLTO compiles so we don't later invoke
5561 // the regular LTO process on them.
5562 if (VSTOffset > 0) {
5563 if (Error Err = parseValueSymbolTable(VSTOffset, ValueIdToLinkageMap))
5564 return Err;
5565 SeenValueSymbolTable = true;
5566 }
5567 SeenGlobalValSummary = true;
5568 if (Error Err = parseEntireSummary(Entry.ID))
5569 return Err;
5570 break;
5571 case bitc::MODULE_STRTAB_BLOCK_ID:
5572 if (Error Err = parseModuleStringTable())
5573 return Err;
5574 break;
5575 }
5576 continue;
5577
5578 case BitstreamEntry::Record: {
5579 Record.clear();
5580 Expected<unsigned> MaybeBitCode = Stream.readRecord(Entry.ID, Record);
5581 if (!MaybeBitCode)
5582 return MaybeBitCode.takeError();
5583 switch (MaybeBitCode.get()) {
5584 default:
5585 break; // Default behavior, ignore unknown content.
5586 case bitc::MODULE_CODE_VERSION: {
5587 if (Error Err = parseVersionRecord(Record).takeError())
5588 return Err;
5589 break;
5590 }
5591 /// MODULE_CODE_SOURCE_FILENAME: [namechar x N]
5592 case bitc::MODULE_CODE_SOURCE_FILENAME: {
5593 SmallString<128> ValueName;
5594 if (convertToString(Record, 0, ValueName))
5595 return error("Invalid record");
5596 SourceFileName = ValueName.c_str();
5597 break;
5598 }
5599 /// MODULE_CODE_HASH: [5*i32]
5600 case bitc::MODULE_CODE_HASH: {
5601 if (Record.size() != 5)
5602 return error("Invalid hash length " + Twine(Record.size()).str());
5603 auto &Hash = getThisModule()->second.second;
5604 int Pos = 0;
5605 for (auto &Val : Record) {
5606 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-11~++20200309111110+2c36c23f347/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 5606, __PRETTY_FUNCTION__))
;
5607 Hash[Pos++] = Val;
5608 }
5609 break;
5610 }
5611 /// MODULE_CODE_VSTOFFSET: [offset]
5612 case bitc::MODULE_CODE_VSTOFFSET:
5613 if (Record.size() < 1)
5614 return error("Invalid record");
5615 // Note that we subtract 1 here because the offset is relative to one
5616 // word before the start of the identification or module block, which
5617 // was historically always the start of the regular bitcode header.
5618 VSTOffset = Record[0] - 1;
5619 break;
5620 // v1 GLOBALVAR: [pointer type, isconst, initid, linkage, ...]
5621 // v1 FUNCTION: [type, callingconv, isproto, linkage, ...]
5622 // v1 ALIAS: [alias type, addrspace, aliasee val#, linkage, ...]
5623 // v2: [strtab offset, strtab size, v1]
5624 case bitc::MODULE_CODE_GLOBALVAR:
5625 case bitc::MODULE_CODE_FUNCTION:
5626 case bitc::MODULE_CODE_ALIAS: {
5627 StringRef Name;
5628 ArrayRef<uint64_t> GVRecord;
5629 std::tie(Name, GVRecord) = readNameFromStrtab(Record);
5630 if (GVRecord.size() <= 3)
5631 return error("Invalid record");
5632 uint64_t RawLinkage = GVRecord[3];
5633 GlobalValue::LinkageTypes Linkage = getDecodedLinkage(RawLinkage);
5634 if (!UseStrtab) {
5635 ValueIdToLinkageMap[ValueId++] = Linkage;
5636 break;
5637 }
5638
5639 setValueGUID(ValueId++, Name, Linkage, SourceFileName);
5640 break;
5641 }
5642 }
5643 }
5644 continue;
5645 }
5646 }
5647}
5648
5649std::vector<ValueInfo>
5650ModuleSummaryIndexBitcodeReader::makeRefList(ArrayRef<uint64_t> Record) {
5651 std::vector<ValueInfo> Ret;
5652 Ret.reserve(Record.size());
5653 for (uint64_t RefValueId : Record)
5654 Ret.push_back(getValueInfoFromValueId(RefValueId).first);
5655 return Ret;
5656}
5657
5658std::vector<FunctionSummary::EdgeTy>
5659ModuleSummaryIndexBitcodeReader::makeCallList(ArrayRef<uint64_t> Record,
5660 bool IsOldProfileFormat,
5661 bool HasProfile, bool HasRelBF) {
5662 std::vector<FunctionSummary::EdgeTy> Ret;
5663 Ret.reserve(Record.size());
5664 for (unsigned I = 0, E = Record.size(); I != E; ++I) {
5665 CalleeInfo::HotnessType Hotness = CalleeInfo::HotnessType::Unknown;
5666 uint64_t RelBF = 0;
5667 ValueInfo Callee = getValueInfoFromValueId(Record[I]).first;
5668 if (IsOldProfileFormat) {
5669 I += 1; // Skip old callsitecount field
5670 if (HasProfile)
5671 I += 1; // Skip old profilecount field
5672 } else if (HasProfile)
5673 Hotness = static_cast<CalleeInfo::HotnessType>(Record[++I]);
5674 else if (HasRelBF)
5675 RelBF = Record[++I];
5676 Ret.push_back(FunctionSummary::EdgeTy{Callee, CalleeInfo(Hotness, RelBF)});
5677 }
5678 return Ret;
5679}
5680
5681static void
5682parseWholeProgramDevirtResolutionByArg(ArrayRef<uint64_t> Record, size_t &Slot,
5683 WholeProgramDevirtResolution &Wpd) {
5684 uint64_t ArgNum = Record[Slot++];
5685 WholeProgramDevirtResolution::ByArg &B =
5686 Wpd.ResByArg[{Record.begin() + Slot, Record.begin() + Slot + ArgNum}];
5687 Slot += ArgNum;
5688
5689 B.TheKind =
5690 static_cast<WholeProgramDevirtResolution::ByArg::Kind>(Record[Slot++]);
5691 B.Info = Record[Slot++];
5692 B.Byte = Record[Slot++];
5693 B.Bit = Record[Slot++];
5694}
5695
5696static void parseWholeProgramDevirtResolution(ArrayRef<uint64_t> Record,
5697 StringRef Strtab, size_t &Slot,
5698 TypeIdSummary &TypeId) {
5699 uint64_t Id = Record[Slot++];
5700 WholeProgramDevirtResolution &Wpd = TypeId.WPDRes[Id];
5701
5702 Wpd.TheKind = static_cast<WholeProgramDevirtResolution::Kind>(Record[Slot++]);
5703 Wpd.SingleImplName = {Strtab.data() + Record[Slot],
5704 static_cast<size_t>(Record[Slot + 1])};
5705 Slot += 2;
5706
5707 uint64_t ResByArgNum = Record[Slot++];
5708 for (uint64_t I = 0; I != ResByArgNum; ++I)
5709 parseWholeProgramDevirtResolutionByArg(Record, Slot, Wpd);
5710}
5711
5712static void parseTypeIdSummaryRecord(ArrayRef<uint64_t> Record,
5713 StringRef Strtab,
5714 ModuleSummaryIndex &TheIndex) {
5715 size_t Slot = 0;
5716 TypeIdSummary &TypeId = TheIndex.getOrInsertTypeIdSummary(
5717 {Strtab.data() + Record[Slot], static_cast<size_t>(Record[Slot + 1])});
5718 Slot += 2;
5719
5720 TypeId.TTRes.TheKind = static_cast<TypeTestResolution::Kind>(Record[Slot++]);
5721 TypeId.TTRes.SizeM1BitWidth = Record[Slot++];
5722 TypeId.TTRes.AlignLog2 = Record[Slot++];
5723 TypeId.TTRes.SizeM1 = Record[Slot++];
5724 TypeId.TTRes.BitMask = Record[Slot++];
5725 TypeId.TTRes.InlineBits = Record[Slot++];
5726
5727 while (Slot < Record.size())
5728 parseWholeProgramDevirtResolution(Record, Strtab, Slot, TypeId);
5729}
5730
5731void ModuleSummaryIndexBitcodeReader::parseTypeIdCompatibleVtableInfo(
5732 ArrayRef<uint64_t> Record, size_t &Slot,
5733 TypeIdCompatibleVtableInfo &TypeId) {
5734 uint64_t Offset = Record[Slot++];
5735 ValueInfo Callee = getValueInfoFromValueId(Record[Slot++]).first;
5736 TypeId.push_back({Offset, Callee});
5737}
5738
5739void ModuleSummaryIndexBitcodeReader::parseTypeIdCompatibleVtableSummaryRecord(
5740 ArrayRef<uint64_t> Record) {
5741 size_t Slot = 0;
5742 TypeIdCompatibleVtableInfo &TypeId =
5743 TheIndex.getOrInsertTypeIdCompatibleVtableSummary(
5744 {Strtab.data() + Record[Slot],
5745 static_cast<size_t>(Record[Slot + 1])});
5746 Slot += 2;
5747
5748 while (Slot < Record.size())
5749 parseTypeIdCompatibleVtableInfo(Record, Slot, TypeId);
5750}
5751
5752static void setSpecialRefs(std::vector<ValueInfo> &Refs, unsigned ROCnt,
5753 unsigned WOCnt) {
5754 // Readonly and writeonly refs are in the end of the refs list.
5755 assert(ROCnt + WOCnt <= Refs.size())((ROCnt + WOCnt <= Refs.size()) ? static_cast<void> (
0) : __assert_fail ("ROCnt + WOCnt <= Refs.size()", "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 5755, __PRETTY_FUNCTION__))
;
5756 unsigned FirstWORef = Refs.size() - WOCnt;
5757 unsigned RefNo = FirstWORef - ROCnt;
5758 for (; RefNo < FirstWORef; ++RefNo)
5759 Refs[RefNo].setReadOnly();
5760 for (; RefNo < Refs.size(); ++RefNo)
5761 Refs[RefNo].setWriteOnly();
5762}
5763
5764// Eagerly parse the entire summary block. This populates the GlobalValueSummary
5765// objects in the index.
5766Error ModuleSummaryIndexBitcodeReader::parseEntireSummary(unsigned ID) {
5767 if (Error Err = Stream.EnterSubBlock(ID))
5768 return Err;
5769 SmallVector<uint64_t, 64> Record;
5770
5771 // Parse version
5772 {
5773 Expected<BitstreamEntry> MaybeEntry = Stream.advanceSkippingSubblocks();
5774 if (!MaybeEntry)
5775 return MaybeEntry.takeError();
5776 BitstreamEntry Entry = MaybeEntry.get();
5777
5778 if (Entry.Kind != BitstreamEntry::Record)
5779 return error("Invalid Summary Block: record for version expected");
5780 Expected<unsigned> MaybeRecord = Stream.readRecord(Entry.ID, Record);
5781 if (!MaybeRecord)
5782 return MaybeRecord.takeError();
5783 if (MaybeRecord.get() != bitc::FS_VERSION)
5784 return error("Invalid Summary Block: version expected");
5785 }
5786 const uint64_t Version = Record[0];
5787 const bool IsOldProfileFormat = Version == 1;
5788 if (Version < 1 || Version > ModuleSummaryIndex::BitcodeSummaryVersion)
5789 return error("Invalid summary version " + Twine(Version) +
5790 ". Version should be in the range [1-" +
5791 Twine(ModuleSummaryIndex::BitcodeSummaryVersion) +
5792 "].");
5793 Record.clear();
5794
5795 // Keep around the last seen summary to be used when we see an optional
5796 // "OriginalName" attachement.
5797 GlobalValueSummary *LastSeenSummary = nullptr;
5798 GlobalValue::GUID LastSeenGUID = 0;
5799
5800 // We can expect to see any number of type ID information records before
5801 // each function summary records; these variables store the information
5802 // collected so far so that it can be used to create the summary object.
5803 std::vector<GlobalValue::GUID> PendingTypeTests;
5804 std::vector<FunctionSummary::VFuncId> PendingTypeTestAssumeVCalls,
5805 PendingTypeCheckedLoadVCalls;
5806 std::vector<FunctionSummary::ConstVCall> PendingTypeTestAssumeConstVCalls,
5807 PendingTypeCheckedLoadConstVCalls;
5808
5809 while (true) {
5810 Expected<BitstreamEntry> MaybeEntry = Stream.advanceSkippingSubblocks();
5811 if (!MaybeEntry)
5812 return MaybeEntry.takeError();
5813 BitstreamEntry Entry = MaybeEntry.get();
5814
5815 switch (Entry.Kind) {
5816 case BitstreamEntry::SubBlock: // Handled for us already.
5817 case BitstreamEntry::Error:
5818 return error("Malformed block");
5819 case BitstreamEntry::EndBlock:
5820 return Error::success();
5821 case BitstreamEntry::Record:
5822 // The interesting case.
5823 break;
5824 }
5825
5826 // Read a record. The record format depends on whether this
5827 // is a per-module index or a combined index file. In the per-module
5828 // case the records contain the associated value's ID for correlation
5829 // with VST entries. In the combined index the correlation is done
5830 // via the bitcode offset of the summary records (which were saved
5831 // in the combined index VST entries). The records also contain
5832 // information used for ThinLTO renaming and importing.
5833 Record.clear();
5834 Expected<unsigned> MaybeBitCode = Stream.readRecord(Entry.ID, Record);
5835 if (!MaybeBitCode)
5836 return MaybeBitCode.takeError();
5837 switch (unsigned BitCode = MaybeBitCode.get()) {
5838 default: // Default behavior: ignore.
5839 break;
5840 case bitc::FS_FLAGS: { // [flags]
5841 TheIndex.setFlags(Record[0]);
5842 break;
5843 }
5844 case bitc::FS_VALUE_GUID: { // [valueid, refguid]
5845 uint64_t ValueID = Record[0];
5846 GlobalValue::GUID RefGUID = Record[1];
5847 ValueIdToValueInfoMap[ValueID] =
5848 std::make_pair(TheIndex.getOrInsertValueInfo(RefGUID), RefGUID);
5849 break;
5850 }
5851 // FS_PERMODULE: [valueid, flags, instcount, fflags, numrefs,
5852 // numrefs x valueid, n x (valueid)]
5853 // FS_PERMODULE_PROFILE: [valueid, flags, instcount, fflags, numrefs,
5854 // numrefs x valueid,
5855 // n x (valueid, hotness)]
5856 // FS_PERMODULE_RELBF: [valueid, flags, instcount, fflags, numrefs,
5857 // numrefs x valueid,
5858 // n x (valueid, relblockfreq)]
5859 case bitc::FS_PERMODULE:
5860 case bitc::FS_PERMODULE_RELBF:
5861 case bitc::FS_PERMODULE_PROFILE: {
5862 unsigned ValueID = Record[0];
5863 uint64_t RawFlags = Record[1];
5864 unsigned InstCount = Record[2];
5865 uint64_t RawFunFlags = 0;
5866 unsigned NumRefs = Record[3];
5867 unsigned NumRORefs = 0, NumWORefs = 0;
5868 int RefListStartIndex = 4;
5869 if (Version >= 4) {
5870 RawFunFlags = Record[3];
5871 NumRefs = Record[4];
5872 RefListStartIndex = 5;
5873 if (Version >= 5) {
5874 NumRORefs = Record[5];
5875 RefListStartIndex = 6;
5876 if (Version >= 7) {
5877 NumWORefs = Record[6];
5878 RefListStartIndex = 7;
5879 }
5880 }
5881 }
5882
5883 auto Flags = getDecodedGVSummaryFlags(RawFlags, Version);
5884 // The module path string ref set in the summary must be owned by the
5885 // index's module string table. Since we don't have a module path
5886 // string table section in the per-module index, we create a single
5887 // module path string table entry with an empty (0) ID to take
5888 // ownership.
5889 int CallGraphEdgeStartIndex = RefListStartIndex + NumRefs;
5890 assert(Record.size() >= RefListStartIndex + NumRefs &&((Record.size() >= RefListStartIndex + NumRefs && "Record size inconsistent with number of references"
) ? static_cast<void> (0) : __assert_fail ("Record.size() >= RefListStartIndex + NumRefs && \"Record size inconsistent with number of references\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 5891, __PRETTY_FUNCTION__))
5891 "Record size inconsistent with number of references")((Record.size() >= RefListStartIndex + NumRefs && "Record size inconsistent with number of references"
) ? static_cast<void> (0) : __assert_fail ("Record.size() >= RefListStartIndex + NumRefs && \"Record size inconsistent with number of references\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 5891, __PRETTY_FUNCTION__))
;
5892 std::vector<ValueInfo> Refs = makeRefList(
5893 ArrayRef<uint64_t>(Record).slice(RefListStartIndex, NumRefs));
5894 bool HasProfile = (BitCode == bitc::FS_PERMODULE_PROFILE);
5895 bool HasRelBF = (BitCode == bitc::FS_PERMODULE_RELBF);
5896 std::vector<FunctionSummary::EdgeTy> Calls = makeCallList(
5897 ArrayRef<uint64_t>(Record).slice(CallGraphEdgeStartIndex),
5898 IsOldProfileFormat, HasProfile, HasRelBF);
5899 setSpecialRefs(Refs, NumRORefs, NumWORefs);
5900 auto FS = std::make_unique<FunctionSummary>(
5901 Flags, InstCount, getDecodedFFlags(RawFunFlags), /*EntryCount=*/0,
5902 std::move(Refs), std::move(Calls), std::move(PendingTypeTests),
5903 std::move(PendingTypeTestAssumeVCalls),
5904 std::move(PendingTypeCheckedLoadVCalls),
5905 std::move(PendingTypeTestAssumeConstVCalls),
5906 std::move(PendingTypeCheckedLoadConstVCalls));
5907 auto VIAndOriginalGUID = getValueInfoFromValueId(ValueID);
5908 FS->setModulePath(getThisModule()->first());
5909 FS->setOriginalName(VIAndOriginalGUID.second);
5910 TheIndex.addGlobalValueSummary(VIAndOriginalGUID.first, std::move(FS));
5911 break;
5912 }
5913 // FS_ALIAS: [valueid, flags, valueid]
5914 // Aliases must be emitted (and parsed) after all FS_PERMODULE entries, as
5915 // they expect all aliasee summaries to be available.
5916 case bitc::FS_ALIAS: {
5917 unsigned ValueID = Record[0];
5918 uint64_t RawFlags = Record[1];
5919 unsigned AliaseeID = Record[2];
5920 auto Flags = getDecodedGVSummaryFlags(RawFlags, Version);
5921 auto AS = std::make_unique<AliasSummary>(Flags);
5922 // The module path string ref set in the summary must be owned by the
5923 // index's module string table. Since we don't have a module path
5924 // string table section in the per-module index, we create a single
5925 // module path string table entry with an empty (0) ID to take
5926 // ownership.
5927 AS->setModulePath(getThisModule()->first());
5928
5929 auto AliaseeVI = getValueInfoFromValueId(AliaseeID).first;
5930 auto AliaseeInModule = TheIndex.findSummaryInModule(AliaseeVI, ModulePath);
5931 if (!AliaseeInModule)
5932 return error("Alias expects aliasee summary to be parsed");
5933 AS->setAliasee(AliaseeVI, AliaseeInModule);
5934
5935 auto GUID = getValueInfoFromValueId(ValueID);
5936 AS->setOriginalName(GUID.second);
5937 TheIndex.addGlobalValueSummary(GUID.first, std::move(AS));
5938 break;
5939 }
5940 // FS_PERMODULE_GLOBALVAR_INIT_REFS: [valueid, flags, varflags, n x valueid]
5941 case bitc::FS_PERMODULE_GLOBALVAR_INIT_REFS: {
5942 unsigned ValueID = Record[0];
5943 uint64_t RawFlags = Record[1];