Bug Summary

File:llvm/lib/Bitcode/Reader/BitcodeReader.cpp
Warning:line 3507, column 5
Value stored to 'OpNum' is never read

Annotated Source Code

Press '?' to see keyboard shortcuts

clang -cc1 -cc1 -triple x86_64-pc-linux-gnu -analyze -disable-free -disable-llvm-verifier -discard-value-names -main-file-name BitcodeReader.cpp -analyzer-store=region -analyzer-opt-analyze-nested-blocks -analyzer-checker=core -analyzer-checker=apiModeling -analyzer-checker=unix -analyzer-checker=deadcode -analyzer-checker=cplusplus -analyzer-checker=security.insecureAPI.UncheckedReturn -analyzer-checker=security.insecureAPI.getpw -analyzer-checker=security.insecureAPI.gets -analyzer-checker=security.insecureAPI.mktemp -analyzer-checker=security.insecureAPI.mkstemp -analyzer-checker=security.insecureAPI.vfork -analyzer-checker=nullability.NullPassedToNonnull -analyzer-checker=nullability.NullReturnedFromNonnull -analyzer-output plist -w -setup-static-analyzer -analyzer-config-compatibility-mode=true -mrelocation-model pic -pic-level 2 -fhalf-no-semantic-interposition -mframe-pointer=none -fmath-errno -fno-rounding-math -mconstructor-aliases -munwind-tables -target-cpu x86-64 -tune-cpu generic -debugger-tuning=gdb -ffunction-sections -fdata-sections -fcoverage-compilation-dir=/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/build-llvm/lib/Bitcode/Reader -resource-dir /usr/lib/llvm-13/lib/clang/13.0.0 -D _DEBUG -D _GNU_SOURCE -D __STDC_CONSTANT_MACROS -D __STDC_FORMAT_MACROS -D __STDC_LIMIT_MACROS -I /build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/build-llvm/lib/Bitcode/Reader -I /build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/llvm/lib/Bitcode/Reader -I /build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/build-llvm/include -I /build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/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/c++/6.3.0/backward -internal-isystem /usr/lib/llvm-13/lib/clang/13.0.0/include -internal-isystem /usr/local/include -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/6.3.0/../../../../x86_64-linux-gnu/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-13~++20210413100635+64c24f493e5f/build-llvm/lib/Bitcode/Reader -fdebug-prefix-map=/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f=. -ferror-limit 19 -fvisibility-inlines-hidden -stack-protector 2 -fgnuc-version=4.2.1 -vectorize-loops -vectorize-slp -analyzer-output=html -analyzer-config stable-report-filename=true -faddrsig -D__GCC_HAVE_DWARF2_CFI_ASM=1 -o /tmp/scan-build-2021-04-14-063029-18377-1 -x c++ /build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/llvm/lib/Bitcode/Reader/BitcodeReader.cpp
1//===- BitcodeReader.cpp - Internal BitcodeReader implementation ----------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8
9#include "llvm/Bitcode/BitcodeReader.h"
10#include "MetadataLoader.h"
11#include "ValueList.h"
12#include "llvm/ADT/APFloat.h"
13#include "llvm/ADT/APInt.h"
14#include "llvm/ADT/ArrayRef.h"
15#include "llvm/ADT/DenseMap.h"
16#include "llvm/ADT/Optional.h"
17#include "llvm/ADT/STLExtras.h"
18#include "llvm/ADT/SmallString.h"
19#include "llvm/ADT/SmallVector.h"
20#include "llvm/ADT/StringRef.h"
21#include "llvm/ADT/Triple.h"
22#include "llvm/ADT/Twine.h"
23#include "llvm/Bitcode/BitcodeCommon.h"
24#include "llvm/Bitcode/LLVMBitCodes.h"
25#include "llvm/Bitstream/BitstreamReader.h"
26#include "llvm/Config/llvm-config.h"
27#include "llvm/IR/Argument.h"
28#include "llvm/IR/Attributes.h"
29#include "llvm/IR/AutoUpgrade.h"
30#include "llvm/IR/BasicBlock.h"
31#include "llvm/IR/CallingConv.h"
32#include "llvm/IR/Comdat.h"
33#include "llvm/IR/Constant.h"
34#include "llvm/IR/Constants.h"
35#include "llvm/IR/DataLayout.h"
36#include "llvm/IR/DebugInfo.h"
37#include "llvm/IR/DebugInfoMetadata.h"
38#include "llvm/IR/DebugLoc.h"
39#include "llvm/IR/DerivedTypes.h"
40#include "llvm/IR/Function.h"
41#include "llvm/IR/GVMaterializer.h"
42#include "llvm/IR/GlobalAlias.h"
43#include "llvm/IR/GlobalIFunc.h"
44#include "llvm/IR/GlobalIndirectSymbol.h"
45#include "llvm/IR/GlobalObject.h"
46#include "llvm/IR/GlobalValue.h"
47#include "llvm/IR/GlobalVariable.h"
48#include "llvm/IR/InlineAsm.h"
49#include "llvm/IR/InstIterator.h"
50#include "llvm/IR/InstrTypes.h"
51#include "llvm/IR/Instruction.h"
52#include "llvm/IR/Instructions.h"
53#include "llvm/IR/Intrinsics.h"
54#include "llvm/IR/LLVMContext.h"
55#include "llvm/IR/Metadata.h"
56#include "llvm/IR/Module.h"
57#include "llvm/IR/ModuleSummaryIndex.h"
58#include "llvm/IR/Operator.h"
59#include "llvm/IR/Type.h"
60#include "llvm/IR/Value.h"
61#include "llvm/IR/Verifier.h"
62#include "llvm/Support/AtomicOrdering.h"
63#include "llvm/Support/Casting.h"
64#include "llvm/Support/CommandLine.h"
65#include "llvm/Support/Compiler.h"
66#include "llvm/Support/Debug.h"
67#include "llvm/Support/Error.h"
68#include "llvm/Support/ErrorHandling.h"
69#include "llvm/Support/ErrorOr.h"
70#include "llvm/Support/ManagedStatic.h"
71#include "llvm/Support/MathExtras.h"
72#include "llvm/Support/MemoryBuffer.h"
73#include "llvm/Support/raw_ostream.h"
74#include <algorithm>
75#include <cassert>
76#include <cstddef>
77#include <cstdint>
78#include <deque>
79#include <map>
80#include <memory>
81#include <set>
82#include <string>
83#include <system_error>
84#include <tuple>
85#include <utility>
86#include <vector>
87
88using namespace llvm;
89
90static cl::opt<bool> PrintSummaryGUIDs(
91 "print-summary-global-ids", cl::init(false), cl::Hidden,
92 cl::desc(
93 "Print the global id for each value when reading the module summary"));
94
95namespace {
96
97enum {
98 SWITCH_INST_MAGIC = 0x4B5 // May 2012 => 1205 => Hex
99};
100
101} // end anonymous namespace
102
103static Error error(const Twine &Message) {
104 return make_error<StringError>(
105 Message, make_error_code(BitcodeError::CorruptedBitcode));
106}
107
108static Error hasInvalidBitcodeHeader(BitstreamCursor &Stream) {
109 if (!Stream.canSkipToPos(4))
110 return createStringError(std::errc::illegal_byte_sequence,
111 "file too small to contain bitcode header");
112 for (unsigned C : {'B', 'C'})
113 if (Expected<SimpleBitstreamCursor::word_t> Res = Stream.Read(8)) {
114 if (Res.get() != C)
115 return createStringError(std::errc::illegal_byte_sequence,
116 "file doesn't start with bitcode header");
117 } else
118 return Res.takeError();
119 for (unsigned C : {0x0, 0xC, 0xE, 0xD})
120 if (Expected<SimpleBitstreamCursor::word_t> Res = Stream.Read(4)) {
121 if (Res.get() != C)
122 return createStringError(std::errc::illegal_byte_sequence,
123 "file doesn't start with bitcode header");
124 } else
125 return Res.takeError();
126 return Error::success();
127}
128
129static Expected<BitstreamCursor> initStream(MemoryBufferRef Buffer) {
130 const unsigned char *BufPtr = (const unsigned char *)Buffer.getBufferStart();
131 const unsigned char *BufEnd = BufPtr + Buffer.getBufferSize();
132
133 if (Buffer.getBufferSize() & 3)
134 return error("Invalid bitcode signature");
135
136 // If we have a wrapper header, parse it and ignore the non-bc file contents.
137 // The magic number is 0x0B17C0DE stored in little endian.
138 if (isBitcodeWrapper(BufPtr, BufEnd))
139 if (SkipBitcodeWrapperHeader(BufPtr, BufEnd, true))
140 return error("Invalid bitcode wrapper header");
141
142 BitstreamCursor Stream(ArrayRef<uint8_t>(BufPtr, BufEnd));
143 if (Error Err = hasInvalidBitcodeHeader(Stream))
144 return std::move(Err);
145
146 return std::move(Stream);
147}
148
149/// Convert a string from a record into an std::string, return true on failure.
150template <typename StrTy>
151static bool convertToString(ArrayRef<uint64_t> Record, unsigned Idx,
152 StrTy &Result) {
153 if (Idx > Record.size())
154 return true;
155
156 Result.append(Record.begin() + Idx, Record.end());
157 return false;
158}
159
160// Strip all the TBAA attachment for the module.
161static void stripTBAA(Module *M) {
162 for (auto &F : *M) {
163 if (F.isMaterializable())
164 continue;
165 for (auto &I : instructions(F))
166 I.setMetadata(LLVMContext::MD_tbaa, nullptr);
167 }
168}
169
170/// Read the "IDENTIFICATION_BLOCK_ID" block, do some basic enforcement on the
171/// "epoch" encoded in the bitcode, and return the producer name if any.
172static Expected<std::string> readIdentificationBlock(BitstreamCursor &Stream) {
173 if (Error Err = Stream.EnterSubBlock(bitc::IDENTIFICATION_BLOCK_ID))
174 return std::move(Err);
175
176 // Read all the records.
177 SmallVector<uint64_t, 64> Record;
178
179 std::string ProducerIdentification;
180
181 while (true) {
182 BitstreamEntry Entry;
183 if (Expected<BitstreamEntry> Res = Stream.advance())
184 Entry = Res.get();
185 else
186 return Res.takeError();
187
188 switch (Entry.Kind) {
189 default:
190 case BitstreamEntry::Error:
191 return error("Malformed block");
192 case BitstreamEntry::EndBlock:
193 return ProducerIdentification;
194 case BitstreamEntry::Record:
195 // The interesting case.
196 break;
197 }
198
199 // Read a record.
200 Record.clear();
201 Expected<unsigned> MaybeBitCode = Stream.readRecord(Entry.ID, Record);
202 if (!MaybeBitCode)
203 return MaybeBitCode.takeError();
204 switch (MaybeBitCode.get()) {
205 default: // Default behavior: reject
206 return error("Invalid value");
207 case bitc::IDENTIFICATION_CODE_STRING: // IDENTIFICATION: [strchr x N]
208 convertToString(Record, 0, ProducerIdentification);
209 break;
210 case bitc::IDENTIFICATION_CODE_EPOCH: { // EPOCH: [epoch#]
211 unsigned epoch = (unsigned)Record[0];
212 if (epoch != bitc::BITCODE_CURRENT_EPOCH) {
213 return error(
214 Twine("Incompatible epoch: Bitcode '") + Twine(epoch) +
215 "' vs current: '" + Twine(bitc::BITCODE_CURRENT_EPOCH) + "'");
216 }
217 }
218 }
219 }
220}
221
222static Expected<std::string> readIdentificationCode(BitstreamCursor &Stream) {
223 // We expect a number of well-defined blocks, though we don't necessarily
224 // need to understand them all.
225 while (true) {
226 if (Stream.AtEndOfStream())
227 return "";
228
229 BitstreamEntry Entry;
230 if (Expected<BitstreamEntry> Res = Stream.advance())
231 Entry = std::move(Res.get());
232 else
233 return Res.takeError();
234
235 switch (Entry.Kind) {
236 case BitstreamEntry::EndBlock:
237 case BitstreamEntry::Error:
238 return error("Malformed block");
239
240 case BitstreamEntry::SubBlock:
241 if (Entry.ID == bitc::IDENTIFICATION_BLOCK_ID)
242 return readIdentificationBlock(Stream);
243
244 // Ignore other sub-blocks.
245 if (Error Err = Stream.SkipBlock())
246 return std::move(Err);
247 continue;
248 case BitstreamEntry::Record:
249 if (Expected<unsigned> Skipped = Stream.skipRecord(Entry.ID))
250 continue;
251 else
252 return Skipped.takeError();
253 }
254 }
255}
256
257static Expected<bool> hasObjCCategoryInModule(BitstreamCursor &Stream) {
258 if (Error Err = Stream.EnterSubBlock(bitc::MODULE_BLOCK_ID))
259 return std::move(Err);
260
261 SmallVector<uint64_t, 64> Record;
262 // Read all the records for this module.
263
264 while (true) {
265 Expected<BitstreamEntry> MaybeEntry = Stream.advanceSkippingSubblocks();
266 if (!MaybeEntry)
267 return MaybeEntry.takeError();
268 BitstreamEntry Entry = MaybeEntry.get();
269
270 switch (Entry.Kind) {
271 case BitstreamEntry::SubBlock: // Handled for us already.
272 case BitstreamEntry::Error:
273 return error("Malformed block");
274 case BitstreamEntry::EndBlock:
275 return false;
276 case BitstreamEntry::Record:
277 // The interesting case.
278 break;
279 }
280
281 // Read a record.
282 Expected<unsigned> MaybeRecord = Stream.readRecord(Entry.ID, Record);
283 if (!MaybeRecord)
284 return MaybeRecord.takeError();
285 switch (MaybeRecord.get()) {
286 default:
287 break; // Default behavior, ignore unknown content.
288 case bitc::MODULE_CODE_SECTIONNAME: { // SECTIONNAME: [strchr x N]
289 std::string S;
290 if (convertToString(Record, 0, S))
291 return error("Invalid record");
292 // Check for the i386 and other (x86_64, ARM) conventions
293 if (S.find("__DATA,__objc_catlist") != std::string::npos ||
294 S.find("__OBJC,__category") != std::string::npos)
295 return true;
296 break;
297 }
298 }
299 Record.clear();
300 }
301 llvm_unreachable("Exit infinite loop")::llvm::llvm_unreachable_internal("Exit infinite loop", "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 301)
;
302}
303
304static Expected<bool> hasObjCCategory(BitstreamCursor &Stream) {
305 // We expect a number of well-defined blocks, though we don't necessarily
306 // need to understand them all.
307 while (true) {
308 BitstreamEntry Entry;
309 if (Expected<BitstreamEntry> Res = Stream.advance())
310 Entry = std::move(Res.get());
311 else
312 return Res.takeError();
313
314 switch (Entry.Kind) {
315 case BitstreamEntry::Error:
316 return error("Malformed block");
317 case BitstreamEntry::EndBlock:
318 return false;
319
320 case BitstreamEntry::SubBlock:
321 if (Entry.ID == bitc::MODULE_BLOCK_ID)
322 return hasObjCCategoryInModule(Stream);
323
324 // Ignore other sub-blocks.
325 if (Error Err = Stream.SkipBlock())
326 return std::move(Err);
327 continue;
328
329 case BitstreamEntry::Record:
330 if (Expected<unsigned> Skipped = Stream.skipRecord(Entry.ID))
331 continue;
332 else
333 return Skipped.takeError();
334 }
335 }
336}
337
338static Expected<std::string> readModuleTriple(BitstreamCursor &Stream) {
339 if (Error Err = Stream.EnterSubBlock(bitc::MODULE_BLOCK_ID))
340 return std::move(Err);
341
342 SmallVector<uint64_t, 64> Record;
343
344 std::string Triple;
345
346 // Read all the records for this module.
347 while (true) {
348 Expected<BitstreamEntry> MaybeEntry = Stream.advanceSkippingSubblocks();
349 if (!MaybeEntry)
350 return MaybeEntry.takeError();
351 BitstreamEntry Entry = MaybeEntry.get();
352
353 switch (Entry.Kind) {
354 case BitstreamEntry::SubBlock: // Handled for us already.
355 case BitstreamEntry::Error:
356 return error("Malformed block");
357 case BitstreamEntry::EndBlock:
358 return Triple;
359 case BitstreamEntry::Record:
360 // The interesting case.
361 break;
362 }
363
364 // Read a record.
365 Expected<unsigned> MaybeRecord = Stream.readRecord(Entry.ID, Record);
366 if (!MaybeRecord)
367 return MaybeRecord.takeError();
368 switch (MaybeRecord.get()) {
369 default: break; // Default behavior, ignore unknown content.
370 case bitc::MODULE_CODE_TRIPLE: { // TRIPLE: [strchr x N]
371 std::string S;
372 if (convertToString(Record, 0, S))
373 return error("Invalid record");
374 Triple = S;
375 break;
376 }
377 }
378 Record.clear();
379 }
380 llvm_unreachable("Exit infinite loop")::llvm::llvm_unreachable_internal("Exit infinite loop", "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 380)
;
381}
382
383static Expected<std::string> readTriple(BitstreamCursor &Stream) {
384 // We expect a number of well-defined blocks, though we don't necessarily
385 // need to understand them all.
386 while (true) {
387 Expected<BitstreamEntry> MaybeEntry = Stream.advance();
388 if (!MaybeEntry)
389 return MaybeEntry.takeError();
390 BitstreamEntry Entry = MaybeEntry.get();
391
392 switch (Entry.Kind) {
393 case BitstreamEntry::Error:
394 return error("Malformed block");
395 case BitstreamEntry::EndBlock:
396 return "";
397
398 case BitstreamEntry::SubBlock:
399 if (Entry.ID == bitc::MODULE_BLOCK_ID)
400 return readModuleTriple(Stream);
401
402 // Ignore other sub-blocks.
403 if (Error Err = Stream.SkipBlock())
404 return std::move(Err);
405 continue;
406
407 case BitstreamEntry::Record:
408 if (llvm::Expected<unsigned> Skipped = Stream.skipRecord(Entry.ID))
409 continue;
410 else
411 return Skipped.takeError();
412 }
413 }
414}
415
416namespace {
417
418class BitcodeReaderBase {
419protected:
420 BitcodeReaderBase(BitstreamCursor Stream, StringRef Strtab)
421 : Stream(std::move(Stream)), Strtab(Strtab) {
422 this->Stream.setBlockInfo(&BlockInfo);
423 }
424
425 BitstreamBlockInfo BlockInfo;
426 BitstreamCursor Stream;
427 StringRef Strtab;
428
429 /// In version 2 of the bitcode we store names of global values and comdats in
430 /// a string table rather than in the VST.
431 bool UseStrtab = false;
432
433 Expected<unsigned> parseVersionRecord(ArrayRef<uint64_t> Record);
434
435 /// If this module uses a string table, pop the reference to the string table
436 /// and return the referenced string and the rest of the record. Otherwise
437 /// just return the record itself.
438 std::pair<StringRef, ArrayRef<uint64_t>>
439 readNameFromStrtab(ArrayRef<uint64_t> Record);
440
441 bool readBlockInfo();
442
443 // Contains an arbitrary and optional string identifying the bitcode producer
444 std::string ProducerIdentification;
445
446 Error error(const Twine &Message);
447};
448
449} // end anonymous namespace
450
451Error BitcodeReaderBase::error(const Twine &Message) {
452 std::string FullMsg = Message.str();
453 if (!ProducerIdentification.empty())
454 FullMsg += " (Producer: '" + ProducerIdentification + "' Reader: 'LLVM " +
455 LLVM_VERSION_STRING"13.0.0" "')";
456 return ::error(FullMsg);
457}
458
459Expected<unsigned>
460BitcodeReaderBase::parseVersionRecord(ArrayRef<uint64_t> Record) {
461 if (Record.empty())
462 return error("Invalid record");
463 unsigned ModuleVersion = Record[0];
464 if (ModuleVersion > 2)
465 return error("Invalid value");
466 UseStrtab = ModuleVersion >= 2;
467 return ModuleVersion;
468}
469
470std::pair<StringRef, ArrayRef<uint64_t>>
471BitcodeReaderBase::readNameFromStrtab(ArrayRef<uint64_t> Record) {
472 if (!UseStrtab)
473 return {"", Record};
474 // Invalid reference. Let the caller complain about the record being empty.
475 if (Record[0] + Record[1] > Strtab.size())
476 return {"", {}};
477 return {StringRef(Strtab.data() + Record[0], Record[1]), Record.slice(2)};
478}
479
480namespace {
481
482class BitcodeReader : public BitcodeReaderBase, public GVMaterializer {
483 LLVMContext &Context;
484 Module *TheModule = nullptr;
485 // Next offset to start scanning for lazy parsing of function bodies.
486 uint64_t NextUnreadBit = 0;
487 // Last function offset found in the VST.
488 uint64_t LastFunctionBlockBit = 0;
489 bool SeenValueSymbolTable = false;
490 uint64_t VSTOffset = 0;
491
492 std::vector<std::string> SectionTable;
493 std::vector<std::string> GCTable;
494
495 std::vector<Type*> TypeList;
496 DenseMap<Function *, FunctionType *> FunctionTypes;
497 BitcodeReaderValueList ValueList;
498 Optional<MetadataLoader> MDLoader;
499 std::vector<Comdat *> ComdatList;
500 SmallVector<Instruction *, 64> InstructionList;
501
502 std::vector<std::pair<GlobalVariable *, unsigned>> GlobalInits;
503 std::vector<std::pair<GlobalIndirectSymbol *, unsigned>> IndirectSymbolInits;
504 std::vector<std::pair<Function *, unsigned>> FunctionPrefixes;
505 std::vector<std::pair<Function *, unsigned>> FunctionPrologues;
506 std::vector<std::pair<Function *, unsigned>> FunctionPersonalityFns;
507
508 /// The set of attributes by index. Index zero in the file is for null, and
509 /// is thus not represented here. As such all indices are off by one.
510 std::vector<AttributeList> MAttributes;
511
512 /// The set of attribute groups.
513 std::map<unsigned, AttributeList> MAttributeGroups;
514
515 /// While parsing a function body, this is a list of the basic blocks for the
516 /// function.
517 std::vector<BasicBlock*> FunctionBBs;
518
519 // When reading the module header, this list is populated with functions that
520 // have bodies later in the file.
521 std::vector<Function*> FunctionsWithBodies;
522
523 // When intrinsic functions are encountered which require upgrading they are
524 // stored here with their replacement function.
525 using UpdatedIntrinsicMap = DenseMap<Function *, Function *>;
526 UpdatedIntrinsicMap UpgradedIntrinsics;
527 // Intrinsics which were remangled because of types rename
528 UpdatedIntrinsicMap RemangledIntrinsics;
529
530 // Several operations happen after the module header has been read, but
531 // before function bodies are processed. This keeps track of whether
532 // we've done this yet.
533 bool SeenFirstFunctionBody = false;
534
535 /// When function bodies are initially scanned, this map contains info about
536 /// where to find deferred function body in the stream.
537 DenseMap<Function*, uint64_t> DeferredFunctionInfo;
538
539 /// When Metadata block is initially scanned when parsing the module, we may
540 /// choose to defer parsing of the metadata. This vector contains info about
541 /// which Metadata blocks are deferred.
542 std::vector<uint64_t> DeferredMetadataInfo;
543
544 /// These are basic blocks forward-referenced by block addresses. They are
545 /// inserted lazily into functions when they're loaded. The basic block ID is
546 /// its index into the vector.
547 DenseMap<Function *, std::vector<BasicBlock *>> BasicBlockFwdRefs;
548 std::deque<Function *> BasicBlockFwdRefQueue;
549
550 /// Indicates that we are using a new encoding for instruction operands where
551 /// most operands in the current FUNCTION_BLOCK are encoded relative to the
552 /// instruction number, for a more compact encoding. Some instruction
553 /// operands are not relative to the instruction ID: basic block numbers, and
554 /// types. Once the old style function blocks have been phased out, we would
555 /// not need this flag.
556 bool UseRelativeIDs = false;
557
558 /// True if all functions will be materialized, negating the need to process
559 /// (e.g.) blockaddress forward references.
560 bool WillMaterializeAllForwardRefs = false;
561
562 bool StripDebugInfo = false;
563 TBAAVerifier TBAAVerifyHelper;
564
565 std::vector<std::string> BundleTags;
566 SmallVector<SyncScope::ID, 8> SSIDs;
567
568public:
569 BitcodeReader(BitstreamCursor Stream, StringRef Strtab,
570 StringRef ProducerIdentification, LLVMContext &Context);
571
572 Error materializeForwardReferencedFunctions();
573
574 Error materialize(GlobalValue *GV) override;
575 Error materializeModule() override;
576 std::vector<StructType *> getIdentifiedStructTypes() const override;
577
578 /// Main interface to parsing a bitcode buffer.
579 /// \returns true if an error occurred.
580 Error parseBitcodeInto(
581 Module *M, bool ShouldLazyLoadMetadata = false, bool IsImporting = false,
582 DataLayoutCallbackTy DataLayoutCallback = [](StringRef) { return None; });
583
584 static uint64_t decodeSignRotatedValue(uint64_t V);
585
586 /// Materialize any deferred Metadata block.
587 Error materializeMetadata() override;
588
589 void setStripDebugInfo() override;
590
591private:
592 std::vector<StructType *> IdentifiedStructTypes;
593 StructType *createIdentifiedStructType(LLVMContext &Context, StringRef Name);
594 StructType *createIdentifiedStructType(LLVMContext &Context);
595
596 /// Map all pointer types within \param Ty to the opaque pointer
597 /// type in the same address space if opaque pointers are being
598 /// used, otherwise nop. This converts a bitcode-reader internal
599 /// type into one suitable for use in a Value.
600 Type *flattenPointerTypes(Type *Ty) {
601 return Ty;
602 }
603
604 /// Given a fully structured pointer type (i.e. not opaque), return
605 /// the flattened form of its element, suitable for use in a Value.
606 Type *getPointerElementFlatType(Type *Ty) {
607 return flattenPointerTypes(cast<PointerType>(Ty)->getElementType());
608 }
609
610 /// Given a fully structured pointer type, get its element type in
611 /// both fully structured form, and flattened form suitable for use
612 /// in a Value.
613 std::pair<Type *, Type *> getPointerElementTypes(Type *FullTy) {
614 Type *ElTy = cast<PointerType>(FullTy)->getElementType();
615 return std::make_pair(ElTy, flattenPointerTypes(ElTy));
616 }
617
618 /// Return the flattened type (suitable for use in a Value)
619 /// specified by the given \param ID .
620 Type *getTypeByID(unsigned ID) {
621 return flattenPointerTypes(getFullyStructuredTypeByID(ID));
622 }
623
624 /// Return the fully structured (bitcode-reader internal) type
625 /// corresponding to the given \param ID .
626 Type *getFullyStructuredTypeByID(unsigned ID);
627
628 Value *getFnValueByID(unsigned ID, Type *Ty, Type **FullTy = nullptr) {
629 if (Ty && Ty->isMetadataTy())
630 return MetadataAsValue::get(Ty->getContext(), getFnMetadataByID(ID));
631 return ValueList.getValueFwdRef(ID, Ty, FullTy);
632 }
633
634 Metadata *getFnMetadataByID(unsigned ID) {
635 return MDLoader->getMetadataFwdRefOrLoad(ID);
636 }
637
638 BasicBlock *getBasicBlock(unsigned ID) const {
639 if (ID >= FunctionBBs.size()) return nullptr; // Invalid ID
640 return FunctionBBs[ID];
641 }
642
643 AttributeList getAttributes(unsigned i) const {
644 if (i-1 < MAttributes.size())
645 return MAttributes[i-1];
646 return AttributeList();
647 }
648
649 /// Read a value/type pair out of the specified record from slot 'Slot'.
650 /// Increment Slot past the number of slots used in the record. Return true on
651 /// failure.
652 bool getValueTypePair(const SmallVectorImpl<uint64_t> &Record, unsigned &Slot,
653 unsigned InstNum, Value *&ResVal,
654 Type **FullTy = nullptr) {
655 if (Slot == Record.size()) return true;
656 unsigned ValNo = (unsigned)Record[Slot++];
657 // Adjust the ValNo, if it was encoded relative to the InstNum.
658 if (UseRelativeIDs)
659 ValNo = InstNum - ValNo;
660 if (ValNo < InstNum) {
661 // If this is not a forward reference, just return the value we already
662 // have.
663 ResVal = getFnValueByID(ValNo, nullptr, FullTy);
664 return ResVal == nullptr;
665 }
666 if (Slot == Record.size())
667 return true;
668
669 unsigned TypeNo = (unsigned)Record[Slot++];
670 ResVal = getFnValueByID(ValNo, getTypeByID(TypeNo));
671 if (FullTy)
672 *FullTy = getFullyStructuredTypeByID(TypeNo);
673 return ResVal == nullptr;
674 }
675
676 /// Read a value out of the specified record from slot 'Slot'. Increment Slot
677 /// past the number of slots used by the value in the record. Return true if
678 /// there is an error.
679 bool popValue(const SmallVectorImpl<uint64_t> &Record, unsigned &Slot,
680 unsigned InstNum, Type *Ty, Value *&ResVal) {
681 if (getValue(Record, Slot, InstNum, Ty, ResVal))
682 return true;
683 // All values currently take a single record slot.
684 ++Slot;
685 return false;
686 }
687
688 /// Like popValue, but does not increment the Slot number.
689 bool getValue(const SmallVectorImpl<uint64_t> &Record, unsigned Slot,
690 unsigned InstNum, Type *Ty, Value *&ResVal) {
691 ResVal = getValue(Record, Slot, InstNum, Ty);
692 return ResVal == nullptr;
693 }
694
695 /// Version of getValue that returns ResVal directly, or 0 if there is an
696 /// error.
697 Value *getValue(const SmallVectorImpl<uint64_t> &Record, unsigned Slot,
698 unsigned InstNum, Type *Ty) {
699 if (Slot == Record.size()) return nullptr;
700 unsigned ValNo = (unsigned)Record[Slot];
701 // Adjust the ValNo, if it was encoded relative to the InstNum.
702 if (UseRelativeIDs)
703 ValNo = InstNum - ValNo;
704 return getFnValueByID(ValNo, Ty);
705 }
706
707 /// Like getValue, but decodes signed VBRs.
708 Value *getValueSigned(const SmallVectorImpl<uint64_t> &Record, unsigned Slot,
709 unsigned InstNum, Type *Ty) {
710 if (Slot == Record.size()) return nullptr;
711 unsigned ValNo = (unsigned)decodeSignRotatedValue(Record[Slot]);
712 // Adjust the ValNo, if it was encoded relative to the InstNum.
713 if (UseRelativeIDs)
714 ValNo = InstNum - ValNo;
715 return getFnValueByID(ValNo, Ty);
716 }
717
718 /// Upgrades old-style typeless byval or sret attributes by adding the
719 /// corresponding argument's pointee type.
720 void propagateByValSRetTypes(CallBase *CB, ArrayRef<Type *> ArgsFullTys);
721
722 /// Converts alignment exponent (i.e. power of two (or zero)) to the
723 /// corresponding alignment to use. If alignment is too large, returns
724 /// a corresponding error code.
725 Error parseAlignmentValue(uint64_t Exponent, MaybeAlign &Alignment);
726 Error parseAttrKind(uint64_t Code, Attribute::AttrKind *Kind);
727 Error parseModule(
728 uint64_t ResumeBit, bool ShouldLazyLoadMetadata = false,
729 DataLayoutCallbackTy DataLayoutCallback = [](StringRef) { return None; });
730
731 Error parseComdatRecord(ArrayRef<uint64_t> Record);
732 Error parseGlobalVarRecord(ArrayRef<uint64_t> Record);
733 Error parseFunctionRecord(ArrayRef<uint64_t> Record);
734 Error parseGlobalIndirectSymbolRecord(unsigned BitCode,
735 ArrayRef<uint64_t> Record);
736
737 Error parseAttributeBlock();
738 Error parseAttributeGroupBlock();
739 Error parseTypeTable();
740 Error parseTypeTableBody();
741 Error parseOperandBundleTags();
742 Error parseSyncScopeNames();
743
744 Expected<Value *> recordValue(SmallVectorImpl<uint64_t> &Record,
745 unsigned NameIndex, Triple &TT);
746 void setDeferredFunctionInfo(unsigned FuncBitcodeOffsetDelta, Function *F,
747 ArrayRef<uint64_t> Record);
748 Error parseValueSymbolTable(uint64_t Offset = 0);
749 Error parseGlobalValueSymbolTable();
750 Error parseConstants();
751 Error rememberAndSkipFunctionBodies();
752 Error rememberAndSkipFunctionBody();
753 /// Save the positions of the Metadata blocks and skip parsing the blocks.
754 Error rememberAndSkipMetadata();
755 Error typeCheckLoadStoreInst(Type *ValType, Type *PtrType);
756 Error parseFunctionBody(Function *F);
757 Error globalCleanup();
758 Error resolveGlobalAndIndirectSymbolInits();
759 Error parseUseLists();
760 Error findFunctionInStream(
761 Function *F,
762 DenseMap<Function *, uint64_t>::iterator DeferredFunctionInfoIterator);
763
764 SyncScope::ID getDecodedSyncScopeID(unsigned Val);
765};
766
767/// Class to manage reading and parsing function summary index bitcode
768/// files/sections.
769class ModuleSummaryIndexBitcodeReader : public BitcodeReaderBase {
770 /// The module index built during parsing.
771 ModuleSummaryIndex &TheIndex;
772
773 /// Indicates whether we have encountered a global value summary section
774 /// yet during parsing.
775 bool SeenGlobalValSummary = false;
776
777 /// Indicates whether we have already parsed the VST, used for error checking.
778 bool SeenValueSymbolTable = false;
779
780 /// Set to the offset of the VST recorded in the MODULE_CODE_VSTOFFSET record.
781 /// Used to enable on-demand parsing of the VST.
782 uint64_t VSTOffset = 0;
783
784 // Map to save ValueId to ValueInfo association that was recorded in the
785 // ValueSymbolTable. It is used after the VST is parsed to convert
786 // call graph edges read from the function summary from referencing
787 // callees by their ValueId to using the ValueInfo instead, which is how
788 // they are recorded in the summary index being built.
789 // We save a GUID which refers to the same global as the ValueInfo, but
790 // ignoring the linkage, i.e. for values other than local linkage they are
791 // identical.
792 DenseMap<unsigned, std::pair<ValueInfo, GlobalValue::GUID>>
793 ValueIdToValueInfoMap;
794
795 /// Map populated during module path string table parsing, from the
796 /// module ID to a string reference owned by the index's module
797 /// path string table, used to correlate with combined index
798 /// summary records.
799 DenseMap<uint64_t, StringRef> ModuleIdMap;
800
801 /// Original source file name recorded in a bitcode record.
802 std::string SourceFileName;
803
804 /// The string identifier given to this module by the client, normally the
805 /// path to the bitcode file.
806 StringRef ModulePath;
807
808 /// For per-module summary indexes, the unique numerical identifier given to
809 /// this module by the client.
810 unsigned ModuleId;
811
812public:
813 ModuleSummaryIndexBitcodeReader(BitstreamCursor Stream, StringRef Strtab,
814 ModuleSummaryIndex &TheIndex,
815 StringRef ModulePath, unsigned ModuleId);
816
817 Error parseModule();
818
819private:
820 void setValueGUID(uint64_t ValueID, StringRef ValueName,
821 GlobalValue::LinkageTypes Linkage,
822 StringRef SourceFileName);
823 Error parseValueSymbolTable(
824 uint64_t Offset,
825 DenseMap<unsigned, GlobalValue::LinkageTypes> &ValueIdToLinkageMap);
826 std::vector<ValueInfo> makeRefList(ArrayRef<uint64_t> Record);
827 std::vector<FunctionSummary::EdgeTy> makeCallList(ArrayRef<uint64_t> Record,
828 bool IsOldProfileFormat,
829 bool HasProfile,
830 bool HasRelBF);
831 Error parseEntireSummary(unsigned ID);
832 Error parseModuleStringTable();
833 void parseTypeIdCompatibleVtableSummaryRecord(ArrayRef<uint64_t> Record);
834 void parseTypeIdCompatibleVtableInfo(ArrayRef<uint64_t> Record, size_t &Slot,
835 TypeIdCompatibleVtableInfo &TypeId);
836 std::vector<FunctionSummary::ParamAccess>
837 parseParamAccesses(ArrayRef<uint64_t> Record);
838
839 std::pair<ValueInfo, GlobalValue::GUID>
840 getValueInfoFromValueId(unsigned ValueId);
841
842 void addThisModule();
843 ModuleSummaryIndex::ModuleInfo *getThisModule();
844};
845
846} // end anonymous namespace
847
848std::error_code llvm::errorToErrorCodeAndEmitErrors(LLVMContext &Ctx,
849 Error Err) {
850 if (Err) {
851 std::error_code EC;
852 handleAllErrors(std::move(Err), [&](ErrorInfoBase &EIB) {
853 EC = EIB.convertToErrorCode();
854 Ctx.emitError(EIB.message());
855 });
856 return EC;
857 }
858 return std::error_code();
859}
860
861BitcodeReader::BitcodeReader(BitstreamCursor Stream, StringRef Strtab,
862 StringRef ProducerIdentification,
863 LLVMContext &Context)
864 : BitcodeReaderBase(std::move(Stream), Strtab), Context(Context),
865 ValueList(Context, Stream.SizeInBytes()) {
866 this->ProducerIdentification = std::string(ProducerIdentification);
867}
868
869Error BitcodeReader::materializeForwardReferencedFunctions() {
870 if (WillMaterializeAllForwardRefs)
871 return Error::success();
872
873 // Prevent recursion.
874 WillMaterializeAllForwardRefs = true;
875
876 while (!BasicBlockFwdRefQueue.empty()) {
877 Function *F = BasicBlockFwdRefQueue.front();
878 BasicBlockFwdRefQueue.pop_front();
879 assert(F && "Expected valid function")((F && "Expected valid function") ? static_cast<void
> (0) : __assert_fail ("F && \"Expected valid function\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 879, __PRETTY_FUNCTION__))
;
880 if (!BasicBlockFwdRefs.count(F))
881 // Already materialized.
882 continue;
883
884 // Check for a function that isn't materializable to prevent an infinite
885 // loop. When parsing a blockaddress stored in a global variable, there
886 // isn't a trivial way to check if a function will have a body without a
887 // linear search through FunctionsWithBodies, so just check it here.
888 if (!F->isMaterializable())
889 return error("Never resolved function from blockaddress");
890
891 // Try to materialize F.
892 if (Error Err = materialize(F))
893 return Err;
894 }
895 assert(BasicBlockFwdRefs.empty() && "Function missing from queue")((BasicBlockFwdRefs.empty() && "Function missing from queue"
) ? static_cast<void> (0) : __assert_fail ("BasicBlockFwdRefs.empty() && \"Function missing from queue\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 895, __PRETTY_FUNCTION__))
;
896
897 // Reset state.
898 WillMaterializeAllForwardRefs = false;
899 return Error::success();
900}
901
902//===----------------------------------------------------------------------===//
903// Helper functions to implement forward reference resolution, etc.
904//===----------------------------------------------------------------------===//
905
906static bool hasImplicitComdat(size_t Val) {
907 switch (Val) {
908 default:
909 return false;
910 case 1: // Old WeakAnyLinkage
911 case 4: // Old LinkOnceAnyLinkage
912 case 10: // Old WeakODRLinkage
913 case 11: // Old LinkOnceODRLinkage
914 return true;
915 }
916}
917
918static GlobalValue::LinkageTypes getDecodedLinkage(unsigned Val) {
919 switch (Val) {
920 default: // Map unknown/new linkages to external
921 case 0:
922 return GlobalValue::ExternalLinkage;
923 case 2:
924 return GlobalValue::AppendingLinkage;
925 case 3:
926 return GlobalValue::InternalLinkage;
927 case 5:
928 return GlobalValue::ExternalLinkage; // Obsolete DLLImportLinkage
929 case 6:
930 return GlobalValue::ExternalLinkage; // Obsolete DLLExportLinkage
931 case 7:
932 return GlobalValue::ExternalWeakLinkage;
933 case 8:
934 return GlobalValue::CommonLinkage;
935 case 9:
936 return GlobalValue::PrivateLinkage;
937 case 12:
938 return GlobalValue::AvailableExternallyLinkage;
939 case 13:
940 return GlobalValue::PrivateLinkage; // Obsolete LinkerPrivateLinkage
941 case 14:
942 return GlobalValue::PrivateLinkage; // Obsolete LinkerPrivateWeakLinkage
943 case 15:
944 return GlobalValue::ExternalLinkage; // Obsolete LinkOnceODRAutoHideLinkage
945 case 1: // Old value with implicit comdat.
946 case 16:
947 return GlobalValue::WeakAnyLinkage;
948 case 10: // Old value with implicit comdat.
949 case 17:
950 return GlobalValue::WeakODRLinkage;
951 case 4: // Old value with implicit comdat.
952 case 18:
953 return GlobalValue::LinkOnceAnyLinkage;
954 case 11: // Old value with implicit comdat.
955 case 19:
956 return GlobalValue::LinkOnceODRLinkage;
957 }
958}
959
960static FunctionSummary::FFlags getDecodedFFlags(uint64_t RawFlags) {
961 FunctionSummary::FFlags Flags;
962 Flags.ReadNone = RawFlags & 0x1;
963 Flags.ReadOnly = (RawFlags >> 1) & 0x1;
964 Flags.NoRecurse = (RawFlags >> 2) & 0x1;
965 Flags.ReturnDoesNotAlias = (RawFlags >> 3) & 0x1;
966 Flags.NoInline = (RawFlags >> 4) & 0x1;
967 Flags.AlwaysInline = (RawFlags >> 5) & 0x1;
968 return Flags;
969}
970
971// Decode the flags for GlobalValue in the summary. The bits for each attribute:
972//
973// linkage: [0,4), notEligibleToImport: 4, live: 5, local: 6, canAutoHide: 7,
974// visibility: [8, 10).
975static GlobalValueSummary::GVFlags getDecodedGVSummaryFlags(uint64_t RawFlags,
976 uint64_t Version) {
977 // Summary were not emitted before LLVM 3.9, we don't need to upgrade Linkage
978 // like getDecodedLinkage() above. Any future change to the linkage enum and
979 // to getDecodedLinkage() will need to be taken into account here as above.
980 auto Linkage = GlobalValue::LinkageTypes(RawFlags & 0xF); // 4 bits
981 auto Visibility = GlobalValue::VisibilityTypes((RawFlags >> 8) & 3); // 2 bits
982 RawFlags = RawFlags >> 4;
983 bool NotEligibleToImport = (RawFlags & 0x1) || Version < 3;
984 // The Live flag wasn't introduced until version 3. For dead stripping
985 // to work correctly on earlier versions, we must conservatively treat all
986 // values as live.
987 bool Live = (RawFlags & 0x2) || Version < 3;
988 bool Local = (RawFlags & 0x4);
989 bool AutoHide = (RawFlags & 0x8);
990
991 return GlobalValueSummary::GVFlags(Linkage, Visibility, NotEligibleToImport,
992 Live, Local, AutoHide);
993}
994
995// Decode the flags for GlobalVariable in the summary
996static GlobalVarSummary::GVarFlags getDecodedGVarFlags(uint64_t RawFlags) {
997 return GlobalVarSummary::GVarFlags(
998 (RawFlags & 0x1) ? true : false, (RawFlags & 0x2) ? true : false,
999 (RawFlags & 0x4) ? true : false,
1000 (GlobalObject::VCallVisibility)(RawFlags >> 3));
1001}
1002
1003static GlobalValue::VisibilityTypes getDecodedVisibility(unsigned Val) {
1004 switch (Val) {
1005 default: // Map unknown visibilities to default.
1006 case 0: return GlobalValue::DefaultVisibility;
1007 case 1: return GlobalValue::HiddenVisibility;
1008 case 2: return GlobalValue::ProtectedVisibility;
1009 }
1010}
1011
1012static GlobalValue::DLLStorageClassTypes
1013getDecodedDLLStorageClass(unsigned Val) {
1014 switch (Val) {
1015 default: // Map unknown values to default.
1016 case 0: return GlobalValue::DefaultStorageClass;
1017 case 1: return GlobalValue::DLLImportStorageClass;
1018 case 2: return GlobalValue::DLLExportStorageClass;
1019 }
1020}
1021
1022static bool getDecodedDSOLocal(unsigned Val) {
1023 switch(Val) {
1024 default: // Map unknown values to preemptable.
1025 case 0: return false;
1026 case 1: return true;
1027 }
1028}
1029
1030static GlobalVariable::ThreadLocalMode getDecodedThreadLocalMode(unsigned Val) {
1031 switch (Val) {
1032 case 0: return GlobalVariable::NotThreadLocal;
1033 default: // Map unknown non-zero value to general dynamic.
1034 case 1: return GlobalVariable::GeneralDynamicTLSModel;
1035 case 2: return GlobalVariable::LocalDynamicTLSModel;
1036 case 3: return GlobalVariable::InitialExecTLSModel;
1037 case 4: return GlobalVariable::LocalExecTLSModel;
1038 }
1039}
1040
1041static GlobalVariable::UnnamedAddr getDecodedUnnamedAddrType(unsigned Val) {
1042 switch (Val) {
1043 default: // Map unknown to UnnamedAddr::None.
1044 case 0: return GlobalVariable::UnnamedAddr::None;
1045 case 1: return GlobalVariable::UnnamedAddr::Global;
1046 case 2: return GlobalVariable::UnnamedAddr::Local;
1047 }
1048}
1049
1050static int getDecodedCastOpcode(unsigned Val) {
1051 switch (Val) {
1052 default: return -1;
1053 case bitc::CAST_TRUNC : return Instruction::Trunc;
1054 case bitc::CAST_ZEXT : return Instruction::ZExt;
1055 case bitc::CAST_SEXT : return Instruction::SExt;
1056 case bitc::CAST_FPTOUI : return Instruction::FPToUI;
1057 case bitc::CAST_FPTOSI : return Instruction::FPToSI;
1058 case bitc::CAST_UITOFP : return Instruction::UIToFP;
1059 case bitc::CAST_SITOFP : return Instruction::SIToFP;
1060 case bitc::CAST_FPTRUNC : return Instruction::FPTrunc;
1061 case bitc::CAST_FPEXT : return Instruction::FPExt;
1062 case bitc::CAST_PTRTOINT: return Instruction::PtrToInt;
1063 case bitc::CAST_INTTOPTR: return Instruction::IntToPtr;
1064 case bitc::CAST_BITCAST : return Instruction::BitCast;
1065 case bitc::CAST_ADDRSPACECAST: return Instruction::AddrSpaceCast;
1066 }
1067}
1068
1069static int getDecodedUnaryOpcode(unsigned Val, Type *Ty) {
1070 bool IsFP = Ty->isFPOrFPVectorTy();
1071 // UnOps are only valid for int/fp or vector of int/fp types
1072 if (!IsFP && !Ty->isIntOrIntVectorTy())
1073 return -1;
1074
1075 switch (Val) {
1076 default:
1077 return -1;
1078 case bitc::UNOP_FNEG:
1079 return IsFP ? Instruction::FNeg : -1;
1080 }
1081}
1082
1083static int getDecodedBinaryOpcode(unsigned Val, Type *Ty) {
1084 bool IsFP = Ty->isFPOrFPVectorTy();
1085 // BinOps are only valid for int/fp or vector of int/fp types
1086 if (!IsFP && !Ty->isIntOrIntVectorTy())
1087 return -1;
1088
1089 switch (Val) {
1090 default:
1091 return -1;
1092 case bitc::BINOP_ADD:
1093 return IsFP ? Instruction::FAdd : Instruction::Add;
1094 case bitc::BINOP_SUB:
1095 return IsFP ? Instruction::FSub : Instruction::Sub;
1096 case bitc::BINOP_MUL:
1097 return IsFP ? Instruction::FMul : Instruction::Mul;
1098 case bitc::BINOP_UDIV:
1099 return IsFP ? -1 : Instruction::UDiv;
1100 case bitc::BINOP_SDIV:
1101 return IsFP ? Instruction::FDiv : Instruction::SDiv;
1102 case bitc::BINOP_UREM:
1103 return IsFP ? -1 : Instruction::URem;
1104 case bitc::BINOP_SREM:
1105 return IsFP ? Instruction::FRem : Instruction::SRem;
1106 case bitc::BINOP_SHL:
1107 return IsFP ? -1 : Instruction::Shl;
1108 case bitc::BINOP_LSHR:
1109 return IsFP ? -1 : Instruction::LShr;
1110 case bitc::BINOP_ASHR:
1111 return IsFP ? -1 : Instruction::AShr;
1112 case bitc::BINOP_AND:
1113 return IsFP ? -1 : Instruction::And;
1114 case bitc::BINOP_OR:
1115 return IsFP ? -1 : Instruction::Or;
1116 case bitc::BINOP_XOR:
1117 return IsFP ? -1 : Instruction::Xor;
1118 }
1119}
1120
1121static AtomicRMWInst::BinOp getDecodedRMWOperation(unsigned Val) {
1122 switch (Val) {
1123 default: return AtomicRMWInst::BAD_BINOP;
1124 case bitc::RMW_XCHG: return AtomicRMWInst::Xchg;
1125 case bitc::RMW_ADD: return AtomicRMWInst::Add;
1126 case bitc::RMW_SUB: return AtomicRMWInst::Sub;
1127 case bitc::RMW_AND: return AtomicRMWInst::And;
1128 case bitc::RMW_NAND: return AtomicRMWInst::Nand;
1129 case bitc::RMW_OR: return AtomicRMWInst::Or;
1130 case bitc::RMW_XOR: return AtomicRMWInst::Xor;
1131 case bitc::RMW_MAX: return AtomicRMWInst::Max;
1132 case bitc::RMW_MIN: return AtomicRMWInst::Min;
1133 case bitc::RMW_UMAX: return AtomicRMWInst::UMax;
1134 case bitc::RMW_UMIN: return AtomicRMWInst::UMin;
1135 case bitc::RMW_FADD: return AtomicRMWInst::FAdd;
1136 case bitc::RMW_FSUB: return AtomicRMWInst::FSub;
1137 }
1138}
1139
1140static AtomicOrdering getDecodedOrdering(unsigned Val) {
1141 switch (Val) {
1142 case bitc::ORDERING_NOTATOMIC: return AtomicOrdering::NotAtomic;
1143 case bitc::ORDERING_UNORDERED: return AtomicOrdering::Unordered;
1144 case bitc::ORDERING_MONOTONIC: return AtomicOrdering::Monotonic;
1145 case bitc::ORDERING_ACQUIRE: return AtomicOrdering::Acquire;
1146 case bitc::ORDERING_RELEASE: return AtomicOrdering::Release;
1147 case bitc::ORDERING_ACQREL: return AtomicOrdering::AcquireRelease;
1148 default: // Map unknown orderings to sequentially-consistent.
1149 case bitc::ORDERING_SEQCST: return AtomicOrdering::SequentiallyConsistent;
1150 }
1151}
1152
1153static Comdat::SelectionKind getDecodedComdatSelectionKind(unsigned Val) {
1154 switch (Val) {
1155 default: // Map unknown selection kinds to any.
1156 case bitc::COMDAT_SELECTION_KIND_ANY:
1157 return Comdat::Any;
1158 case bitc::COMDAT_SELECTION_KIND_EXACT_MATCH:
1159 return Comdat::ExactMatch;
1160 case bitc::COMDAT_SELECTION_KIND_LARGEST:
1161 return Comdat::Largest;
1162 case bitc::COMDAT_SELECTION_KIND_NO_DUPLICATES:
1163 return Comdat::NoDuplicates;
1164 case bitc::COMDAT_SELECTION_KIND_SAME_SIZE:
1165 return Comdat::SameSize;
1166 }
1167}
1168
1169static FastMathFlags getDecodedFastMathFlags(unsigned Val) {
1170 FastMathFlags FMF;
1171 if (0 != (Val & bitc::UnsafeAlgebra))
1172 FMF.setFast();
1173 if (0 != (Val & bitc::AllowReassoc))
1174 FMF.setAllowReassoc();
1175 if (0 != (Val & bitc::NoNaNs))
1176 FMF.setNoNaNs();
1177 if (0 != (Val & bitc::NoInfs))
1178 FMF.setNoInfs();
1179 if (0 != (Val & bitc::NoSignedZeros))
1180 FMF.setNoSignedZeros();
1181 if (0 != (Val & bitc::AllowReciprocal))
1182 FMF.setAllowReciprocal();
1183 if (0 != (Val & bitc::AllowContract))
1184 FMF.setAllowContract(true);
1185 if (0 != (Val & bitc::ApproxFunc))
1186 FMF.setApproxFunc();
1187 return FMF;
1188}
1189
1190static void upgradeDLLImportExportLinkage(GlobalValue *GV, unsigned Val) {
1191 switch (Val) {
1192 case 5: GV->setDLLStorageClass(GlobalValue::DLLImportStorageClass); break;
1193 case 6: GV->setDLLStorageClass(GlobalValue::DLLExportStorageClass); break;
1194 }
1195}
1196
1197Type *BitcodeReader::getFullyStructuredTypeByID(unsigned ID) {
1198 // The type table size is always specified correctly.
1199 if (ID >= TypeList.size())
1200 return nullptr;
1201
1202 if (Type *Ty = TypeList[ID])
1203 return Ty;
1204
1205 // If we have a forward reference, the only possible case is when it is to a
1206 // named struct. Just create a placeholder for now.
1207 return TypeList[ID] = createIdentifiedStructType(Context);
1208}
1209
1210StructType *BitcodeReader::createIdentifiedStructType(LLVMContext &Context,
1211 StringRef Name) {
1212 auto *Ret = StructType::create(Context, Name);
1213 IdentifiedStructTypes.push_back(Ret);
1214 return Ret;
1215}
1216
1217StructType *BitcodeReader::createIdentifiedStructType(LLVMContext &Context) {
1218 auto *Ret = StructType::create(Context);
1219 IdentifiedStructTypes.push_back(Ret);
1220 return Ret;
1221}
1222
1223//===----------------------------------------------------------------------===//
1224// Functions for parsing blocks from the bitcode file
1225//===----------------------------------------------------------------------===//
1226
1227static uint64_t getRawAttributeMask(Attribute::AttrKind Val) {
1228 switch (Val) {
1229 case Attribute::EndAttrKinds:
1230 case Attribute::EmptyKey:
1231 case Attribute::TombstoneKey:
1232 llvm_unreachable("Synthetic enumerators which should never get here")::llvm::llvm_unreachable_internal("Synthetic enumerators which should never get here"
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 1232)
;
1233
1234 case Attribute::None: return 0;
1235 case Attribute::ZExt: return 1 << 0;
1236 case Attribute::SExt: return 1 << 1;
1237 case Attribute::NoReturn: return 1 << 2;
1238 case Attribute::InReg: return 1 << 3;
1239 case Attribute::StructRet: return 1 << 4;
1240 case Attribute::NoUnwind: return 1 << 5;
1241 case Attribute::NoAlias: return 1 << 6;
1242 case Attribute::ByVal: return 1 << 7;
1243 case Attribute::Nest: return 1 << 8;
1244 case Attribute::ReadNone: return 1 << 9;
1245 case Attribute::ReadOnly: return 1 << 10;
1246 case Attribute::NoInline: return 1 << 11;
1247 case Attribute::AlwaysInline: return 1 << 12;
1248 case Attribute::OptimizeForSize: return 1 << 13;
1249 case Attribute::StackProtect: return 1 << 14;
1250 case Attribute::StackProtectReq: return 1 << 15;
1251 case Attribute::Alignment: return 31 << 16;
1252 case Attribute::NoCapture: return 1 << 21;
1253 case Attribute::NoRedZone: return 1 << 22;
1254 case Attribute::NoImplicitFloat: return 1 << 23;
1255 case Attribute::Naked: return 1 << 24;
1256 case Attribute::InlineHint: return 1 << 25;
1257 case Attribute::StackAlignment: return 7 << 26;
1258 case Attribute::ReturnsTwice: return 1 << 29;
1259 case Attribute::UWTable: return 1 << 30;
1260 case Attribute::NonLazyBind: return 1U << 31;
1261 case Attribute::SanitizeAddress: return 1ULL << 32;
1262 case Attribute::MinSize: return 1ULL << 33;
1263 case Attribute::NoDuplicate: return 1ULL << 34;
1264 case Attribute::StackProtectStrong: return 1ULL << 35;
1265 case Attribute::SanitizeThread: return 1ULL << 36;
1266 case Attribute::SanitizeMemory: return 1ULL << 37;
1267 case Attribute::NoBuiltin: return 1ULL << 38;
1268 case Attribute::Returned: return 1ULL << 39;
1269 case Attribute::Cold: return 1ULL << 40;
1270 case Attribute::Builtin: return 1ULL << 41;
1271 case Attribute::OptimizeNone: return 1ULL << 42;
1272 case Attribute::InAlloca: return 1ULL << 43;
1273 case Attribute::NonNull: return 1ULL << 44;
1274 case Attribute::JumpTable: return 1ULL << 45;
1275 case Attribute::Convergent: return 1ULL << 46;
1276 case Attribute::SafeStack: return 1ULL << 47;
1277 case Attribute::NoRecurse: return 1ULL << 48;
1278 case Attribute::InaccessibleMemOnly: return 1ULL << 49;
1279 case Attribute::InaccessibleMemOrArgMemOnly: return 1ULL << 50;
1280 case Attribute::SwiftSelf: return 1ULL << 51;
1281 case Attribute::SwiftError: return 1ULL << 52;
1282 case Attribute::WriteOnly: return 1ULL << 53;
1283 case Attribute::Speculatable: return 1ULL << 54;
1284 case Attribute::StrictFP: return 1ULL << 55;
1285 case Attribute::SanitizeHWAddress: return 1ULL << 56;
1286 case Attribute::NoCfCheck: return 1ULL << 57;
1287 case Attribute::OptForFuzzing: return 1ULL << 58;
1288 case Attribute::ShadowCallStack: return 1ULL << 59;
1289 case Attribute::SpeculativeLoadHardening:
1290 return 1ULL << 60;
1291 case Attribute::ImmArg:
1292 return 1ULL << 61;
1293 case Attribute::WillReturn:
1294 return 1ULL << 62;
1295 case Attribute::NoFree:
1296 return 1ULL << 63;
1297 default:
1298 // Other attributes are not supported in the raw format,
1299 // as we ran out of space.
1300 return 0;
1301 }
1302 llvm_unreachable("Unsupported attribute type")::llvm::llvm_unreachable_internal("Unsupported attribute type"
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 1302)
;
1303}
1304
1305static void addRawAttributeValue(AttrBuilder &B, uint64_t Val) {
1306 if (!Val) return;
1307
1308 for (Attribute::AttrKind I = Attribute::None; I != Attribute::EndAttrKinds;
1309 I = Attribute::AttrKind(I + 1)) {
1310 if (uint64_t A = (Val & getRawAttributeMask(I))) {
1311 if (I == Attribute::Alignment)
1312 B.addAlignmentAttr(1ULL << ((A >> 16) - 1));
1313 else if (I == Attribute::StackAlignment)
1314 B.addStackAlignmentAttr(1ULL << ((A >> 26)-1));
1315 else
1316 B.addAttribute(I);
1317 }
1318 }
1319}
1320
1321/// This fills an AttrBuilder object with the LLVM attributes that have
1322/// been decoded from the given integer. This function must stay in sync with
1323/// 'encodeLLVMAttributesForBitcode'.
1324static void decodeLLVMAttributesForBitcode(AttrBuilder &B,
1325 uint64_t EncodedAttrs) {
1326 // The alignment is stored as a 16-bit raw value from bits 31--16. We shift
1327 // the bits above 31 down by 11 bits.
1328 unsigned Alignment = (EncodedAttrs & (0xffffULL << 16)) >> 16;
1329 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-13~++20210413100635+64c24f493e5f/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 1330, __PRETTY_FUNCTION__))
1330 "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-13~++20210413100635+64c24f493e5f/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 1330, __PRETTY_FUNCTION__))
;
1331
1332 if (Alignment)
1333 B.addAlignmentAttr(Alignment);
1334 addRawAttributeValue(B, ((EncodedAttrs & (0xfffffULL << 32)) >> 11) |
1335 (EncodedAttrs & 0xffff));
1336}
1337
1338Error BitcodeReader::parseAttributeBlock() {
1339 if (Error Err = Stream.EnterSubBlock(bitc::PARAMATTR_BLOCK_ID))
1340 return Err;
1341
1342 if (!MAttributes.empty())
1343 return error("Invalid multiple blocks");
1344
1345 SmallVector<uint64_t, 64> Record;
1346
1347 SmallVector<AttributeList, 8> Attrs;
1348
1349 // Read all the records.
1350 while (true) {
1351 Expected<BitstreamEntry> MaybeEntry = Stream.advanceSkippingSubblocks();
1352 if (!MaybeEntry)
1353 return MaybeEntry.takeError();
1354 BitstreamEntry Entry = MaybeEntry.get();
1355
1356 switch (Entry.Kind) {
1357 case BitstreamEntry::SubBlock: // Handled for us already.
1358 case BitstreamEntry::Error:
1359 return error("Malformed block");
1360 case BitstreamEntry::EndBlock:
1361 return Error::success();
1362 case BitstreamEntry::Record:
1363 // The interesting case.
1364 break;
1365 }
1366
1367 // Read a record.
1368 Record.clear();
1369 Expected<unsigned> MaybeRecord = Stream.readRecord(Entry.ID, Record);
1370 if (!MaybeRecord)
1371 return MaybeRecord.takeError();
1372 switch (MaybeRecord.get()) {
1373 default: // Default behavior: ignore.
1374 break;
1375 case bitc::PARAMATTR_CODE_ENTRY_OLD: // ENTRY: [paramidx0, attr0, ...]
1376 // Deprecated, but still needed to read old bitcode files.
1377 if (Record.size() & 1)
1378 return error("Invalid record");
1379
1380 for (unsigned i = 0, e = Record.size(); i != e; i += 2) {
1381 AttrBuilder B;
1382 decodeLLVMAttributesForBitcode(B, Record[i+1]);
1383 Attrs.push_back(AttributeList::get(Context, Record[i], B));
1384 }
1385
1386 MAttributes.push_back(AttributeList::get(Context, Attrs));
1387 Attrs.clear();
1388 break;
1389 case bitc::PARAMATTR_CODE_ENTRY: // ENTRY: [attrgrp0, attrgrp1, ...]
1390 for (unsigned i = 0, e = Record.size(); i != e; ++i)
1391 Attrs.push_back(MAttributeGroups[Record[i]]);
1392
1393 MAttributes.push_back(AttributeList::get(Context, Attrs));
1394 Attrs.clear();
1395 break;
1396 }
1397 }
1398}
1399
1400// Returns Attribute::None on unrecognized codes.
1401static Attribute::AttrKind getAttrFromCode(uint64_t Code) {
1402 switch (Code) {
1403 default:
1404 return Attribute::None;
1405 case bitc::ATTR_KIND_ALIGNMENT:
1406 return Attribute::Alignment;
1407 case bitc::ATTR_KIND_ALWAYS_INLINE:
1408 return Attribute::AlwaysInline;
1409 case bitc::ATTR_KIND_ARGMEMONLY:
1410 return Attribute::ArgMemOnly;
1411 case bitc::ATTR_KIND_BUILTIN:
1412 return Attribute::Builtin;
1413 case bitc::ATTR_KIND_BY_VAL:
1414 return Attribute::ByVal;
1415 case bitc::ATTR_KIND_IN_ALLOCA:
1416 return Attribute::InAlloca;
1417 case bitc::ATTR_KIND_COLD:
1418 return Attribute::Cold;
1419 case bitc::ATTR_KIND_CONVERGENT:
1420 return Attribute::Convergent;
1421 case bitc::ATTR_KIND_INACCESSIBLEMEM_ONLY:
1422 return Attribute::InaccessibleMemOnly;
1423 case bitc::ATTR_KIND_INACCESSIBLEMEM_OR_ARGMEMONLY:
1424 return Attribute::InaccessibleMemOrArgMemOnly;
1425 case bitc::ATTR_KIND_INLINE_HINT:
1426 return Attribute::InlineHint;
1427 case bitc::ATTR_KIND_IN_REG:
1428 return Attribute::InReg;
1429 case bitc::ATTR_KIND_JUMP_TABLE:
1430 return Attribute::JumpTable;
1431 case bitc::ATTR_KIND_MIN_SIZE:
1432 return Attribute::MinSize;
1433 case bitc::ATTR_KIND_NAKED:
1434 return Attribute::Naked;
1435 case bitc::ATTR_KIND_NEST:
1436 return Attribute::Nest;
1437 case bitc::ATTR_KIND_NO_ALIAS:
1438 return Attribute::NoAlias;
1439 case bitc::ATTR_KIND_NO_BUILTIN:
1440 return Attribute::NoBuiltin;
1441 case bitc::ATTR_KIND_NO_CALLBACK:
1442 return Attribute::NoCallback;
1443 case bitc::ATTR_KIND_NO_CAPTURE:
1444 return Attribute::NoCapture;
1445 case bitc::ATTR_KIND_NO_DUPLICATE:
1446 return Attribute::NoDuplicate;
1447 case bitc::ATTR_KIND_NOFREE:
1448 return Attribute::NoFree;
1449 case bitc::ATTR_KIND_NO_IMPLICIT_FLOAT:
1450 return Attribute::NoImplicitFloat;
1451 case bitc::ATTR_KIND_NO_INLINE:
1452 return Attribute::NoInline;
1453 case bitc::ATTR_KIND_NO_RECURSE:
1454 return Attribute::NoRecurse;
1455 case bitc::ATTR_KIND_NO_MERGE:
1456 return Attribute::NoMerge;
1457 case bitc::ATTR_KIND_NON_LAZY_BIND:
1458 return Attribute::NonLazyBind;
1459 case bitc::ATTR_KIND_NON_NULL:
1460 return Attribute::NonNull;
1461 case bitc::ATTR_KIND_DEREFERENCEABLE:
1462 return Attribute::Dereferenceable;
1463 case bitc::ATTR_KIND_DEREFERENCEABLE_OR_NULL:
1464 return Attribute::DereferenceableOrNull;
1465 case bitc::ATTR_KIND_ALLOC_SIZE:
1466 return Attribute::AllocSize;
1467 case bitc::ATTR_KIND_NO_RED_ZONE:
1468 return Attribute::NoRedZone;
1469 case bitc::ATTR_KIND_NO_RETURN:
1470 return Attribute::NoReturn;
1471 case bitc::ATTR_KIND_NOSYNC:
1472 return Attribute::NoSync;
1473 case bitc::ATTR_KIND_NOCF_CHECK:
1474 return Attribute::NoCfCheck;
1475 case bitc::ATTR_KIND_NO_UNWIND:
1476 return Attribute::NoUnwind;
1477 case bitc::ATTR_KIND_NULL_POINTER_IS_VALID:
1478 return Attribute::NullPointerIsValid;
1479 case bitc::ATTR_KIND_OPT_FOR_FUZZING:
1480 return Attribute::OptForFuzzing;
1481 case bitc::ATTR_KIND_OPTIMIZE_FOR_SIZE:
1482 return Attribute::OptimizeForSize;
1483 case bitc::ATTR_KIND_OPTIMIZE_NONE:
1484 return Attribute::OptimizeNone;
1485 case bitc::ATTR_KIND_READ_NONE:
1486 return Attribute::ReadNone;
1487 case bitc::ATTR_KIND_READ_ONLY:
1488 return Attribute::ReadOnly;
1489 case bitc::ATTR_KIND_RETURNED:
1490 return Attribute::Returned;
1491 case bitc::ATTR_KIND_RETURNS_TWICE:
1492 return Attribute::ReturnsTwice;
1493 case bitc::ATTR_KIND_S_EXT:
1494 return Attribute::SExt;
1495 case bitc::ATTR_KIND_SPECULATABLE:
1496 return Attribute::Speculatable;
1497 case bitc::ATTR_KIND_STACK_ALIGNMENT:
1498 return Attribute::StackAlignment;
1499 case bitc::ATTR_KIND_STACK_PROTECT:
1500 return Attribute::StackProtect;
1501 case bitc::ATTR_KIND_STACK_PROTECT_REQ:
1502 return Attribute::StackProtectReq;
1503 case bitc::ATTR_KIND_STACK_PROTECT_STRONG:
1504 return Attribute::StackProtectStrong;
1505 case bitc::ATTR_KIND_SAFESTACK:
1506 return Attribute::SafeStack;
1507 case bitc::ATTR_KIND_SHADOWCALLSTACK:
1508 return Attribute::ShadowCallStack;
1509 case bitc::ATTR_KIND_STRICT_FP:
1510 return Attribute::StrictFP;
1511 case bitc::ATTR_KIND_STRUCT_RET:
1512 return Attribute::StructRet;
1513 case bitc::ATTR_KIND_SANITIZE_ADDRESS:
1514 return Attribute::SanitizeAddress;
1515 case bitc::ATTR_KIND_SANITIZE_HWADDRESS:
1516 return Attribute::SanitizeHWAddress;
1517 case bitc::ATTR_KIND_SANITIZE_THREAD:
1518 return Attribute::SanitizeThread;
1519 case bitc::ATTR_KIND_SANITIZE_MEMORY:
1520 return Attribute::SanitizeMemory;
1521 case bitc::ATTR_KIND_SPECULATIVE_LOAD_HARDENING:
1522 return Attribute::SpeculativeLoadHardening;
1523 case bitc::ATTR_KIND_SWIFT_ERROR:
1524 return Attribute::SwiftError;
1525 case bitc::ATTR_KIND_SWIFT_SELF:
1526 return Attribute::SwiftSelf;
1527 case bitc::ATTR_KIND_UW_TABLE:
1528 return Attribute::UWTable;
1529 case bitc::ATTR_KIND_VSCALE_RANGE:
1530 return Attribute::VScaleRange;
1531 case bitc::ATTR_KIND_WILLRETURN:
1532 return Attribute::WillReturn;
1533 case bitc::ATTR_KIND_WRITEONLY:
1534 return Attribute::WriteOnly;
1535 case bitc::ATTR_KIND_Z_EXT:
1536 return Attribute::ZExt;
1537 case bitc::ATTR_KIND_IMMARG:
1538 return Attribute::ImmArg;
1539 case bitc::ATTR_KIND_SANITIZE_MEMTAG:
1540 return Attribute::SanitizeMemTag;
1541 case bitc::ATTR_KIND_PREALLOCATED:
1542 return Attribute::Preallocated;
1543 case bitc::ATTR_KIND_NOUNDEF:
1544 return Attribute::NoUndef;
1545 case bitc::ATTR_KIND_BYREF:
1546 return Attribute::ByRef;
1547 case bitc::ATTR_KIND_MUSTPROGRESS:
1548 return Attribute::MustProgress;
1549 case bitc::ATTR_KIND_HOT:
1550 return Attribute::Hot;
1551 }
1552}
1553
1554Error BitcodeReader::parseAlignmentValue(uint64_t Exponent,
1555 MaybeAlign &Alignment) {
1556 // Note: Alignment in bitcode files is incremented by 1, so that zero
1557 // can be used for default alignment.
1558 if (Exponent > Value::MaxAlignmentExponent + 1)
1559 return error("Invalid alignment value");
1560 Alignment = decodeMaybeAlign(Exponent);
1561 return Error::success();
1562}
1563
1564Error BitcodeReader::parseAttrKind(uint64_t Code, Attribute::AttrKind *Kind) {
1565 *Kind = getAttrFromCode(Code);
1566 if (*Kind == Attribute::None)
1567 return error("Unknown attribute kind (" + Twine(Code) + ")");
1568 return Error::success();
1569}
1570
1571Error BitcodeReader::parseAttributeGroupBlock() {
1572 if (Error Err = Stream.EnterSubBlock(bitc::PARAMATTR_GROUP_BLOCK_ID))
1573 return Err;
1574
1575 if (!MAttributeGroups.empty())
1576 return error("Invalid multiple blocks");
1577
1578 SmallVector<uint64_t, 64> Record;
1579
1580 // Read all the records.
1581 while (true) {
1582 Expected<BitstreamEntry> MaybeEntry = Stream.advanceSkippingSubblocks();
1583 if (!MaybeEntry)
1584 return MaybeEntry.takeError();
1585 BitstreamEntry Entry = MaybeEntry.get();
1586
1587 switch (Entry.Kind) {
1588 case BitstreamEntry::SubBlock: // Handled for us already.
1589 case BitstreamEntry::Error:
1590 return error("Malformed block");
1591 case BitstreamEntry::EndBlock:
1592 return Error::success();
1593 case BitstreamEntry::Record:
1594 // The interesting case.
1595 break;
1596 }
1597
1598 // Read a record.
1599 Record.clear();
1600 Expected<unsigned> MaybeRecord = Stream.readRecord(Entry.ID, Record);
1601 if (!MaybeRecord)
1602 return MaybeRecord.takeError();
1603 switch (MaybeRecord.get()) {
1604 default: // Default behavior: ignore.
1605 break;
1606 case bitc::PARAMATTR_GRP_CODE_ENTRY: { // ENTRY: [grpid, idx, a0, a1, ...]
1607 if (Record.size() < 3)
1608 return error("Invalid record");
1609
1610 uint64_t GrpID = Record[0];
1611 uint64_t Idx = Record[1]; // Index of the object this attribute refers to.
1612
1613 AttrBuilder B;
1614 for (unsigned i = 2, e = Record.size(); i != e; ++i) {
1615 if (Record[i] == 0) { // Enum attribute
1616 Attribute::AttrKind Kind;
1617 if (Error Err = parseAttrKind(Record[++i], &Kind))
1618 return Err;
1619
1620 // Upgrade old-style byval attribute to one with a type, even if it's
1621 // nullptr. We will have to insert the real type when we associate
1622 // this AttributeList with a function.
1623 if (Kind == Attribute::ByVal)
1624 B.addByValAttr(nullptr);
1625 else if (Kind == Attribute::StructRet)
1626 B.addStructRetAttr(nullptr);
1627 else if (Kind == Attribute::InAlloca)
1628 B.addInAllocaAttr(nullptr);
1629
1630 B.addAttribute(Kind);
1631 } else if (Record[i] == 1) { // Integer attribute
1632 Attribute::AttrKind Kind;
1633 if (Error Err = parseAttrKind(Record[++i], &Kind))
1634 return Err;
1635 if (Kind == Attribute::Alignment)
1636 B.addAlignmentAttr(Record[++i]);
1637 else if (Kind == Attribute::StackAlignment)
1638 B.addStackAlignmentAttr(Record[++i]);
1639 else if (Kind == Attribute::Dereferenceable)
1640 B.addDereferenceableAttr(Record[++i]);
1641 else if (Kind == Attribute::DereferenceableOrNull)
1642 B.addDereferenceableOrNullAttr(Record[++i]);
1643 else if (Kind == Attribute::AllocSize)
1644 B.addAllocSizeAttrFromRawRepr(Record[++i]);
1645 else if (Kind == Attribute::VScaleRange)
1646 B.addVScaleRangeAttrFromRawRepr(Record[++i]);
1647 } else if (Record[i] == 3 || Record[i] == 4) { // String attribute
1648 bool HasValue = (Record[i++] == 4);
1649 SmallString<64> KindStr;
1650 SmallString<64> ValStr;
1651
1652 while (Record[i] != 0 && i != e)
1653 KindStr += Record[i++];
1654 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-13~++20210413100635+64c24f493e5f/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 1654, __PRETTY_FUNCTION__))
;
1655
1656 if (HasValue) {
1657 // Has a value associated with it.
1658 ++i; // Skip the '0' that terminates the "kind" string.
1659 while (Record[i] != 0 && i != e)
1660 ValStr += Record[i++];
1661 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-13~++20210413100635+64c24f493e5f/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 1661, __PRETTY_FUNCTION__))
;
1662 }
1663
1664 B.addAttribute(KindStr.str(), ValStr.str());
1665 } else {
1666 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-13~++20210413100635+64c24f493e5f/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 1667, __PRETTY_FUNCTION__))
1667 "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-13~++20210413100635+64c24f493e5f/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 1667, __PRETTY_FUNCTION__))
;
1668 bool HasType = Record[i] == 6;
1669 Attribute::AttrKind Kind;
1670 if (Error Err = parseAttrKind(Record[++i], &Kind))
1671 return Err;
1672 if (Kind == Attribute::ByVal) {
1673 B.addByValAttr(HasType ? getTypeByID(Record[++i]) : nullptr);
1674 } else if (Kind == Attribute::StructRet) {
1675 B.addStructRetAttr(HasType ? getTypeByID(Record[++i]) : nullptr);
1676 } else if (Kind == Attribute::ByRef) {
1677 B.addByRefAttr(getTypeByID(Record[++i]));
1678 } else if (Kind == Attribute::Preallocated) {
1679 B.addPreallocatedAttr(getTypeByID(Record[++i]));
1680 } else if (Kind == Attribute::InAlloca) {
1681 B.addInAllocaAttr(HasType ? getTypeByID(Record[++i]) : nullptr);
1682 }
1683 }
1684 }
1685
1686 UpgradeAttributes(B);
1687 MAttributeGroups[GrpID] = AttributeList::get(Context, Idx, B);
1688 break;
1689 }
1690 }
1691 }
1692}
1693
1694Error BitcodeReader::parseTypeTable() {
1695 if (Error Err = Stream.EnterSubBlock(bitc::TYPE_BLOCK_ID_NEW))
1696 return Err;
1697
1698 return parseTypeTableBody();
1699}
1700
1701Error BitcodeReader::parseTypeTableBody() {
1702 if (!TypeList.empty())
1703 return error("Invalid multiple blocks");
1704
1705 SmallVector<uint64_t, 64> Record;
1706 unsigned NumRecords = 0;
1707
1708 SmallString<64> TypeName;
1709
1710 // Read all the records for this type table.
1711 while (true) {
1712 Expected<BitstreamEntry> MaybeEntry = Stream.advanceSkippingSubblocks();
1713 if (!MaybeEntry)
1714 return MaybeEntry.takeError();
1715 BitstreamEntry Entry = MaybeEntry.get();
1716
1717 switch (Entry.Kind) {
1718 case BitstreamEntry::SubBlock: // Handled for us already.
1719 case BitstreamEntry::Error:
1720 return error("Malformed block");
1721 case BitstreamEntry::EndBlock:
1722 if (NumRecords != TypeList.size())
1723 return error("Malformed block");
1724 return Error::success();
1725 case BitstreamEntry::Record:
1726 // The interesting case.
1727 break;
1728 }
1729
1730 // Read a record.
1731 Record.clear();
1732 Type *ResultTy = nullptr;
1733 Expected<unsigned> MaybeRecord = Stream.readRecord(Entry.ID, Record);
1734 if (!MaybeRecord)
1735 return MaybeRecord.takeError();
1736 switch (MaybeRecord.get()) {
1737 default:
1738 return error("Invalid value");
1739 case bitc::TYPE_CODE_NUMENTRY: // TYPE_CODE_NUMENTRY: [numentries]
1740 // TYPE_CODE_NUMENTRY contains a count of the number of types in the
1741 // type list. This allows us to reserve space.
1742 if (Record.empty())
1743 return error("Invalid record");
1744 TypeList.resize(Record[0]);
1745 continue;
1746 case bitc::TYPE_CODE_VOID: // VOID
1747 ResultTy = Type::getVoidTy(Context);
1748 break;
1749 case bitc::TYPE_CODE_HALF: // HALF
1750 ResultTy = Type::getHalfTy(Context);
1751 break;
1752 case bitc::TYPE_CODE_BFLOAT: // BFLOAT
1753 ResultTy = Type::getBFloatTy(Context);
1754 break;
1755 case bitc::TYPE_CODE_FLOAT: // FLOAT
1756 ResultTy = Type::getFloatTy(Context);
1757 break;
1758 case bitc::TYPE_CODE_DOUBLE: // DOUBLE
1759 ResultTy = Type::getDoubleTy(Context);
1760 break;
1761 case bitc::TYPE_CODE_X86_FP80: // X86_FP80
1762 ResultTy = Type::getX86_FP80Ty(Context);
1763 break;
1764 case bitc::TYPE_CODE_FP128: // FP128
1765 ResultTy = Type::getFP128Ty(Context);
1766 break;
1767 case bitc::TYPE_CODE_PPC_FP128: // PPC_FP128
1768 ResultTy = Type::getPPC_FP128Ty(Context);
1769 break;
1770 case bitc::TYPE_CODE_LABEL: // LABEL
1771 ResultTy = Type::getLabelTy(Context);
1772 break;
1773 case bitc::TYPE_CODE_METADATA: // METADATA
1774 ResultTy = Type::getMetadataTy(Context);
1775 break;
1776 case bitc::TYPE_CODE_X86_MMX: // X86_MMX
1777 ResultTy = Type::getX86_MMXTy(Context);
1778 break;
1779 case bitc::TYPE_CODE_X86_AMX: // X86_AMX
1780 ResultTy = Type::getX86_AMXTy(Context);
1781 break;
1782 case bitc::TYPE_CODE_TOKEN: // TOKEN
1783 ResultTy = Type::getTokenTy(Context);
1784 break;
1785 case bitc::TYPE_CODE_INTEGER: { // INTEGER: [width]
1786 if (Record.empty())
1787 return error("Invalid record");
1788
1789 uint64_t NumBits = Record[0];
1790 if (NumBits < IntegerType::MIN_INT_BITS ||
1791 NumBits > IntegerType::MAX_INT_BITS)
1792 return error("Bitwidth for integer type out of range");
1793 ResultTy = IntegerType::get(Context, NumBits);
1794 break;
1795 }
1796 case bitc::TYPE_CODE_POINTER: { // POINTER: [pointee type] or
1797 // [pointee type, address space]
1798 if (Record.empty())
1799 return error("Invalid record");
1800 unsigned AddressSpace = 0;
1801 if (Record.size() == 2)
1802 AddressSpace = Record[1];
1803 ResultTy = getTypeByID(Record[0]);
1804 if (!ResultTy ||
1805 !PointerType::isValidElementType(ResultTy))
1806 return error("Invalid type");
1807 ResultTy = PointerType::get(ResultTy, AddressSpace);
1808 break;
1809 }
1810 case bitc::TYPE_CODE_FUNCTION_OLD: {
1811 // Deprecated, but still needed to read old bitcode files.
1812 // FUNCTION: [vararg, attrid, retty, paramty x N]
1813 if (Record.size() < 3)
1814 return error("Invalid record");
1815 SmallVector<Type*, 8> ArgTys;
1816 for (unsigned i = 3, e = Record.size(); i != e; ++i) {
1817 if (Type *T = getTypeByID(Record[i]))
1818 ArgTys.push_back(T);
1819 else
1820 break;
1821 }
1822
1823 ResultTy = getTypeByID(Record[2]);
1824 if (!ResultTy || ArgTys.size() < Record.size()-3)
1825 return error("Invalid type");
1826
1827 ResultTy = FunctionType::get(ResultTy, ArgTys, Record[0]);
1828 break;
1829 }
1830 case bitc::TYPE_CODE_FUNCTION: {
1831 // FUNCTION: [vararg, retty, paramty x N]
1832 if (Record.size() < 2)
1833 return error("Invalid record");
1834 SmallVector<Type*, 8> ArgTys;
1835 for (unsigned i = 2, e = Record.size(); i != e; ++i) {
1836 if (Type *T = getTypeByID(Record[i])) {
1837 if (!FunctionType::isValidArgumentType(T))
1838 return error("Invalid function argument type");
1839 ArgTys.push_back(T);
1840 }
1841 else
1842 break;
1843 }
1844
1845 ResultTy = getTypeByID(Record[1]);
1846 if (!ResultTy || ArgTys.size() < Record.size()-2)
1847 return error("Invalid type");
1848
1849 ResultTy = FunctionType::get(ResultTy, ArgTys, Record[0]);
1850 break;
1851 }
1852 case bitc::TYPE_CODE_STRUCT_ANON: { // STRUCT: [ispacked, eltty x N]
1853 if (Record.empty())
1854 return error("Invalid record");
1855 SmallVector<Type*, 8> EltTys;
1856 for (unsigned i = 1, e = Record.size(); i != e; ++i) {
1857 if (Type *T = getTypeByID(Record[i]))
1858 EltTys.push_back(T);
1859 else
1860 break;
1861 }
1862 if (EltTys.size() != Record.size()-1)
1863 return error("Invalid type");
1864 ResultTy = StructType::get(Context, EltTys, Record[0]);
1865 break;
1866 }
1867 case bitc::TYPE_CODE_STRUCT_NAME: // STRUCT_NAME: [strchr x N]
1868 if (convertToString(Record, 0, TypeName))
1869 return error("Invalid record");
1870 continue;
1871
1872 case bitc::TYPE_CODE_STRUCT_NAMED: { // STRUCT: [ispacked, eltty x N]
1873 if (Record.empty())
1874 return error("Invalid record");
1875
1876 if (NumRecords >= TypeList.size())
1877 return error("Invalid TYPE table");
1878
1879 // Check to see if this was forward referenced, if so fill in the temp.
1880 StructType *Res = cast_or_null<StructType>(TypeList[NumRecords]);
1881 if (Res) {
1882 Res->setName(TypeName);
1883 TypeList[NumRecords] = nullptr;
1884 } else // Otherwise, create a new struct.
1885 Res = createIdentifiedStructType(Context, TypeName);
1886 TypeName.clear();
1887
1888 SmallVector<Type*, 8> EltTys;
1889 for (unsigned i = 1, e = Record.size(); i != e; ++i) {
1890 if (Type *T = getTypeByID(Record[i]))
1891 EltTys.push_back(T);
1892 else
1893 break;
1894 }
1895 if (EltTys.size() != Record.size()-1)
1896 return error("Invalid record");
1897 Res->setBody(EltTys, Record[0]);
1898 ResultTy = Res;
1899 break;
1900 }
1901 case bitc::TYPE_CODE_OPAQUE: { // OPAQUE: []
1902 if (Record.size() != 1)
1903 return error("Invalid record");
1904
1905 if (NumRecords >= TypeList.size())
1906 return error("Invalid TYPE table");
1907
1908 // Check to see if this was forward referenced, if so fill in the temp.
1909 StructType *Res = cast_or_null<StructType>(TypeList[NumRecords]);
1910 if (Res) {
1911 Res->setName(TypeName);
1912 TypeList[NumRecords] = nullptr;
1913 } else // Otherwise, create a new struct with no body.
1914 Res = createIdentifiedStructType(Context, TypeName);
1915 TypeName.clear();
1916 ResultTy = Res;
1917 break;
1918 }
1919 case bitc::TYPE_CODE_ARRAY: // ARRAY: [numelts, eltty]
1920 if (Record.size() < 2)
1921 return error("Invalid record");
1922 ResultTy = getTypeByID(Record[1]);
1923 if (!ResultTy || !ArrayType::isValidElementType(ResultTy))
1924 return error("Invalid type");
1925 ResultTy = ArrayType::get(ResultTy, Record[0]);
1926 break;
1927 case bitc::TYPE_CODE_VECTOR: // VECTOR: [numelts, eltty] or
1928 // [numelts, eltty, scalable]
1929 if (Record.size() < 2)
1930 return error("Invalid record");
1931 if (Record[0] == 0)
1932 return error("Invalid vector length");
1933 ResultTy = getTypeByID(Record[1]);
1934 if (!ResultTy || !StructType::isValidElementType(ResultTy))
1935 return error("Invalid type");
1936 bool Scalable = Record.size() > 2 ? Record[2] : false;
1937 ResultTy = VectorType::get(ResultTy, Record[0], Scalable);
1938 break;
1939 }
1940
1941 if (NumRecords >= TypeList.size())
1942 return error("Invalid TYPE table");
1943 if (TypeList[NumRecords])
1944 return error(
1945 "Invalid TYPE table: Only named structs can be forward referenced");
1946 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-13~++20210413100635+64c24f493e5f/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 1946, __PRETTY_FUNCTION__))
;
1947 TypeList[NumRecords++] = ResultTy;
1948 }
1949}
1950
1951Error BitcodeReader::parseOperandBundleTags() {
1952 if (Error Err = Stream.EnterSubBlock(bitc::OPERAND_BUNDLE_TAGS_BLOCK_ID))
1953 return Err;
1954
1955 if (!BundleTags.empty())
1956 return error("Invalid multiple blocks");
1957
1958 SmallVector<uint64_t, 64> Record;
1959
1960 while (true) {
1961 Expected<BitstreamEntry> MaybeEntry = Stream.advanceSkippingSubblocks();
1962 if (!MaybeEntry)
1963 return MaybeEntry.takeError();
1964 BitstreamEntry Entry = MaybeEntry.get();
1965
1966 switch (Entry.Kind) {
1967 case BitstreamEntry::SubBlock: // Handled for us already.
1968 case BitstreamEntry::Error:
1969 return error("Malformed block");
1970 case BitstreamEntry::EndBlock:
1971 return Error::success();
1972 case BitstreamEntry::Record:
1973 // The interesting case.
1974 break;
1975 }
1976
1977 // Tags are implicitly mapped to integers by their order.
1978
1979 Expected<unsigned> MaybeRecord = Stream.readRecord(Entry.ID, Record);
1980 if (!MaybeRecord)
1981 return MaybeRecord.takeError();
1982 if (MaybeRecord.get() != bitc::OPERAND_BUNDLE_TAG)
1983 return error("Invalid record");
1984
1985 // OPERAND_BUNDLE_TAG: [strchr x N]
1986 BundleTags.emplace_back();
1987 if (convertToString(Record, 0, BundleTags.back()))
1988 return error("Invalid record");
1989 Record.clear();
1990 }
1991}
1992
1993Error BitcodeReader::parseSyncScopeNames() {
1994 if (Error Err = Stream.EnterSubBlock(bitc::SYNC_SCOPE_NAMES_BLOCK_ID))
1995 return Err;
1996
1997 if (!SSIDs.empty())
1998 return error("Invalid multiple synchronization scope names blocks");
1999
2000 SmallVector<uint64_t, 64> Record;
2001 while (true) {
2002 Expected<BitstreamEntry> MaybeEntry = Stream.advanceSkippingSubblocks();
2003 if (!MaybeEntry)
2004 return MaybeEntry.takeError();
2005 BitstreamEntry Entry = MaybeEntry.get();
2006
2007 switch (Entry.Kind) {
2008 case BitstreamEntry::SubBlock: // Handled for us already.
2009 case BitstreamEntry::Error:
2010 return error("Malformed block");
2011 case BitstreamEntry::EndBlock:
2012 if (SSIDs.empty())
2013 return error("Invalid empty synchronization scope names block");
2014 return Error::success();
2015 case BitstreamEntry::Record:
2016 // The interesting case.
2017 break;
2018 }
2019
2020 // Synchronization scope names are implicitly mapped to synchronization
2021 // scope IDs by their order.
2022
2023 Expected<unsigned> MaybeRecord = Stream.readRecord(Entry.ID, Record);
2024 if (!MaybeRecord)
2025 return MaybeRecord.takeError();
2026 if (MaybeRecord.get() != bitc::SYNC_SCOPE_NAME)
2027 return error("Invalid record");
2028
2029 SmallString<16> SSN;
2030 if (convertToString(Record, 0, SSN))
2031 return error("Invalid record");
2032
2033 SSIDs.push_back(Context.getOrInsertSyncScopeID(SSN));
2034 Record.clear();
2035 }
2036}
2037
2038/// Associate a value with its name from the given index in the provided record.
2039Expected<Value *> BitcodeReader::recordValue(SmallVectorImpl<uint64_t> &Record,
2040 unsigned NameIndex, Triple &TT) {
2041 SmallString<128> ValueName;
2042 if (convertToString(Record, NameIndex, ValueName))
2043 return error("Invalid record");
2044 unsigned ValueID = Record[0];
2045 if (ValueID >= ValueList.size() || !ValueList[ValueID])
2046 return error("Invalid record");
2047 Value *V = ValueList[ValueID];
2048
2049 StringRef NameStr(ValueName.data(), ValueName.size());
2050 if (NameStr.find_first_of(0) != StringRef::npos)
2051 return error("Invalid value name");
2052 V->setName(NameStr);
2053 auto *GO = dyn_cast<GlobalObject>(V);
2054 if (GO) {
2055 if (GO->getComdat() == reinterpret_cast<Comdat *>(1)) {
2056 if (TT.supportsCOMDAT())
2057 GO->setComdat(TheModule->getOrInsertComdat(V->getName()));
2058 else
2059 GO->setComdat(nullptr);
2060 }
2061 }
2062 return V;
2063}
2064
2065/// Helper to note and return the current location, and jump to the given
2066/// offset.
2067static Expected<uint64_t> jumpToValueSymbolTable(uint64_t Offset,
2068 BitstreamCursor &Stream) {
2069 // Save the current parsing location so we can jump back at the end
2070 // of the VST read.
2071 uint64_t CurrentBit = Stream.GetCurrentBitNo();
2072 if (Error JumpFailed = Stream.JumpToBit(Offset * 32))
2073 return std::move(JumpFailed);
2074 Expected<BitstreamEntry> MaybeEntry = Stream.advance();
2075 if (!MaybeEntry)
2076 return MaybeEntry.takeError();
2077 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-13~++20210413100635+64c24f493e5f/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 2077, __PRETTY_FUNCTION__))
;
2078 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-13~++20210413100635+64c24f493e5f/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 2078, __PRETTY_FUNCTION__))
;
2079 return CurrentBit;
2080}
2081
2082void BitcodeReader::setDeferredFunctionInfo(unsigned FuncBitcodeOffsetDelta,
2083 Function *F,
2084 ArrayRef<uint64_t> Record) {
2085 // Note that we subtract 1 here because the offset is relative to one word
2086 // before the start of the identification or module block, which was
2087 // historically always the start of the regular bitcode header.
2088 uint64_t FuncWordOffset = Record[1] - 1;
2089 uint64_t FuncBitOffset = FuncWordOffset * 32;
2090 DeferredFunctionInfo[F] = FuncBitOffset + FuncBitcodeOffsetDelta;
2091 // Set the LastFunctionBlockBit to point to the last function block.
2092 // Later when parsing is resumed after function materialization,
2093 // we can simply skip that last function block.
2094 if (FuncBitOffset > LastFunctionBlockBit)
2095 LastFunctionBlockBit = FuncBitOffset;
2096}
2097
2098/// Read a new-style GlobalValue symbol table.
2099Error BitcodeReader::parseGlobalValueSymbolTable() {
2100 unsigned FuncBitcodeOffsetDelta =
2101 Stream.getAbbrevIDWidth() + bitc::BlockIDWidth;
2102
2103 if (Error Err = Stream.EnterSubBlock(bitc::VALUE_SYMTAB_BLOCK_ID))
2104 return Err;
2105
2106 SmallVector<uint64_t, 64> Record;
2107 while (true) {
2108 Expected<BitstreamEntry> MaybeEntry = Stream.advanceSkippingSubblocks();
2109 if (!MaybeEntry)
2110 return MaybeEntry.takeError();
2111 BitstreamEntry Entry = MaybeEntry.get();
2112
2113 switch (Entry.Kind) {
2114 case BitstreamEntry::SubBlock:
2115 case BitstreamEntry::Error:
2116 return error("Malformed block");
2117 case BitstreamEntry::EndBlock:
2118 return Error::success();
2119 case BitstreamEntry::Record:
2120 break;
2121 }
2122
2123 Record.clear();
2124 Expected<unsigned> MaybeRecord = Stream.readRecord(Entry.ID, Record);
2125 if (!MaybeRecord)
2126 return MaybeRecord.takeError();
2127 switch (MaybeRecord.get()) {
2128 case bitc::VST_CODE_FNENTRY: // [valueid, offset]
2129 setDeferredFunctionInfo(FuncBitcodeOffsetDelta,
2130 cast<Function>(ValueList[Record[0]]), Record);
2131 break;
2132 }
2133 }
2134}
2135
2136/// Parse the value symbol table at either the current parsing location or
2137/// at the given bit offset if provided.
2138Error BitcodeReader::parseValueSymbolTable(uint64_t Offset) {
2139 uint64_t CurrentBit;
2140 // Pass in the Offset to distinguish between calling for the module-level
2141 // VST (where we want to jump to the VST offset) and the function-level
2142 // VST (where we don't).
2143 if (Offset > 0) {
2144 Expected<uint64_t> MaybeCurrentBit = jumpToValueSymbolTable(Offset, Stream);
2145 if (!MaybeCurrentBit)
2146 return MaybeCurrentBit.takeError();
2147 CurrentBit = MaybeCurrentBit.get();
2148 // If this module uses a string table, read this as a module-level VST.
2149 if (UseStrtab) {
2150 if (Error Err = parseGlobalValueSymbolTable())
2151 return Err;
2152 if (Error JumpFailed = Stream.JumpToBit(CurrentBit))
2153 return JumpFailed;
2154 return Error::success();
2155 }
2156 // Otherwise, the VST will be in a similar format to a function-level VST,
2157 // and will contain symbol names.
2158 }
2159
2160 // Compute the delta between the bitcode indices in the VST (the word offset
2161 // to the word-aligned ENTER_SUBBLOCK for the function block, and that
2162 // expected by the lazy reader. The reader's EnterSubBlock expects to have
2163 // already read the ENTER_SUBBLOCK code (size getAbbrevIDWidth) and BlockID
2164 // (size BlockIDWidth). Note that we access the stream's AbbrevID width here
2165 // just before entering the VST subblock because: 1) the EnterSubBlock
2166 // changes the AbbrevID width; 2) the VST block is nested within the same
2167 // outer MODULE_BLOCK as the FUNCTION_BLOCKs and therefore have the same
2168 // AbbrevID width before calling EnterSubBlock; and 3) when we want to
2169 // jump to the FUNCTION_BLOCK using this offset later, we don't want
2170 // to rely on the stream's AbbrevID width being that of the MODULE_BLOCK.
2171 unsigned FuncBitcodeOffsetDelta =
2172 Stream.getAbbrevIDWidth() + bitc::BlockIDWidth;
2173
2174 if (Error Err = Stream.EnterSubBlock(bitc::VALUE_SYMTAB_BLOCK_ID))
2175 return Err;
2176
2177 SmallVector<uint64_t, 64> Record;
2178
2179 Triple TT(TheModule->getTargetTriple());
2180
2181 // Read all the records for this value table.
2182 SmallString<128> ValueName;
2183
2184 while (true) {
2185 Expected<BitstreamEntry> MaybeEntry = Stream.advanceSkippingSubblocks();
2186 if (!MaybeEntry)
2187 return MaybeEntry.takeError();
2188 BitstreamEntry Entry = MaybeEntry.get();
2189
2190 switch (Entry.Kind) {
2191 case BitstreamEntry::SubBlock: // Handled for us already.
2192 case BitstreamEntry::Error:
2193 return error("Malformed block");
2194 case BitstreamEntry::EndBlock:
2195 if (Offset > 0)
2196 if (Error JumpFailed = Stream.JumpToBit(CurrentBit))
2197 return JumpFailed;
2198 return Error::success();
2199 case BitstreamEntry::Record:
2200 // The interesting case.
2201 break;
2202 }
2203
2204 // Read a record.
2205 Record.clear();
2206 Expected<unsigned> MaybeRecord = Stream.readRecord(Entry.ID, Record);
2207 if (!MaybeRecord)
2208 return MaybeRecord.takeError();
2209 switch (MaybeRecord.get()) {
2210 default: // Default behavior: unknown type.
2211 break;
2212 case bitc::VST_CODE_ENTRY: { // VST_CODE_ENTRY: [valueid, namechar x N]
2213 Expected<Value *> ValOrErr = recordValue(Record, 1, TT);
2214 if (Error Err = ValOrErr.takeError())
2215 return Err;
2216 ValOrErr.get();
2217 break;
2218 }
2219 case bitc::VST_CODE_FNENTRY: {
2220 // VST_CODE_FNENTRY: [valueid, offset, namechar x N]
2221 Expected<Value *> ValOrErr = recordValue(Record, 2, TT);
2222 if (Error Err = ValOrErr.takeError())
2223 return Err;
2224 Value *V = ValOrErr.get();
2225
2226 // Ignore function offsets emitted for aliases of functions in older
2227 // versions of LLVM.
2228 if (auto *F = dyn_cast<Function>(V))
2229 setDeferredFunctionInfo(FuncBitcodeOffsetDelta, F, Record);
2230 break;
2231 }
2232 case bitc::VST_CODE_BBENTRY: {
2233 if (convertToString(Record, 1, ValueName))
2234 return error("Invalid record");
2235 BasicBlock *BB = getBasicBlock(Record[0]);
2236 if (!BB)
2237 return error("Invalid record");
2238
2239 BB->setName(StringRef(ValueName.data(), ValueName.size()));
2240 ValueName.clear();
2241 break;
2242 }
2243 }
2244 }
2245}
2246
2247/// Decode a signed value stored with the sign bit in the LSB for dense VBR
2248/// encoding.
2249uint64_t BitcodeReader::decodeSignRotatedValue(uint64_t V) {
2250 if ((V & 1) == 0)
2251 return V >> 1;
2252 if (V != 1)
2253 return -(V >> 1);
2254 // There is no such thing as -0 with integers. "-0" really means MININT.
2255 return 1ULL << 63;
2256}
2257
2258/// Resolve all of the initializers for global values and aliases that we can.
2259Error BitcodeReader::resolveGlobalAndIndirectSymbolInits() {
2260 std::vector<std::pair<GlobalVariable *, unsigned>> GlobalInitWorklist;
2261 std::vector<std::pair<GlobalIndirectSymbol *, unsigned>>
2262 IndirectSymbolInitWorklist;
2263 std::vector<std::pair<Function *, unsigned>> FunctionPrefixWorklist;
2264 std::vector<std::pair<Function *, unsigned>> FunctionPrologueWorklist;
2265 std::vector<std::pair<Function *, unsigned>> FunctionPersonalityFnWorklist;
2266
2267 GlobalInitWorklist.swap(GlobalInits);
2268 IndirectSymbolInitWorklist.swap(IndirectSymbolInits);
2269 FunctionPrefixWorklist.swap(FunctionPrefixes);
2270 FunctionPrologueWorklist.swap(FunctionPrologues);
2271 FunctionPersonalityFnWorklist.swap(FunctionPersonalityFns);
2272
2273 while (!GlobalInitWorklist.empty()) {
2274 unsigned ValID = GlobalInitWorklist.back().second;
2275 if (ValID >= ValueList.size()) {
2276 // Not ready to resolve this yet, it requires something later in the file.
2277 GlobalInits.push_back(GlobalInitWorklist.back());
2278 } else {
2279 if (Constant *C = dyn_cast_or_null<Constant>(ValueList[ValID]))
2280 GlobalInitWorklist.back().first->setInitializer(C);
2281 else
2282 return error("Expected a constant");
2283 }
2284 GlobalInitWorklist.pop_back();
2285 }
2286
2287 while (!IndirectSymbolInitWorklist.empty()) {
2288 unsigned ValID = IndirectSymbolInitWorklist.back().second;
2289 if (ValID >= ValueList.size()) {
2290 IndirectSymbolInits.push_back(IndirectSymbolInitWorklist.back());
2291 } else {
2292 Constant *C = dyn_cast_or_null<Constant>(ValueList[ValID]);
2293 if (!C)
2294 return error("Expected a constant");
2295 GlobalIndirectSymbol *GIS = IndirectSymbolInitWorklist.back().first;
2296 if (isa<GlobalAlias>(GIS) && C->getType() != GIS->getType())
2297 return error("Alias and aliasee types don't match");
2298 GIS->setIndirectSymbol(C);
2299 }
2300 IndirectSymbolInitWorklist.pop_back();
2301 }
2302
2303 while (!FunctionPrefixWorklist.empty()) {
2304 unsigned ValID = FunctionPrefixWorklist.back().second;
2305 if (ValID >= ValueList.size()) {
2306 FunctionPrefixes.push_back(FunctionPrefixWorklist.back());
2307 } else {
2308 if (Constant *C = dyn_cast_or_null<Constant>(ValueList[ValID]))
2309 FunctionPrefixWorklist.back().first->setPrefixData(C);
2310 else
2311 return error("Expected a constant");
2312 }
2313 FunctionPrefixWorklist.pop_back();
2314 }
2315
2316 while (!FunctionPrologueWorklist.empty()) {
2317 unsigned ValID = FunctionPrologueWorklist.back().second;
2318 if (ValID >= ValueList.size()) {
2319 FunctionPrologues.push_back(FunctionPrologueWorklist.back());
2320 } else {
2321 if (Constant *C = dyn_cast_or_null<Constant>(ValueList[ValID]))
2322 FunctionPrologueWorklist.back().first->setPrologueData(C);
2323 else
2324 return error("Expected a constant");
2325 }
2326 FunctionPrologueWorklist.pop_back();
2327 }
2328
2329 while (!FunctionPersonalityFnWorklist.empty()) {
2330 unsigned ValID = FunctionPersonalityFnWorklist.back().second;
2331 if (ValID >= ValueList.size()) {
2332 FunctionPersonalityFns.push_back(FunctionPersonalityFnWorklist.back());
2333 } else {
2334 if (Constant *C = dyn_cast_or_null<Constant>(ValueList[ValID]))
2335 FunctionPersonalityFnWorklist.back().first->setPersonalityFn(C);
2336 else
2337 return error("Expected a constant");
2338 }
2339 FunctionPersonalityFnWorklist.pop_back();
2340 }
2341
2342 return Error::success();
2343}
2344
2345APInt llvm::readWideAPInt(ArrayRef<uint64_t> Vals, unsigned TypeBits) {
2346 SmallVector<uint64_t, 8> Words(Vals.size());
2347 transform(Vals, Words.begin(),
2348 BitcodeReader::decodeSignRotatedValue);
2349
2350 return APInt(TypeBits, Words);
2351}
2352
2353Error BitcodeReader::parseConstants() {
2354 if (Error Err = Stream.EnterSubBlock(bitc::CONSTANTS_BLOCK_ID))
2355 return Err;
2356
2357 SmallVector<uint64_t, 64> Record;
2358
2359 // Read all the records for this value table.
2360 Type *CurTy = Type::getInt32Ty(Context);
2361 Type *CurFullTy = Type::getInt32Ty(Context);
2362 unsigned NextCstNo = ValueList.size();
2363
2364 struct DelayedShufTy {
2365 VectorType *OpTy;
2366 VectorType *RTy;
2367 Type *CurFullTy;
2368 uint64_t Op0Idx;
2369 uint64_t Op1Idx;
2370 uint64_t Op2Idx;
2371 unsigned CstNo;
2372 };
2373 std::vector<DelayedShufTy> DelayedShuffles;
2374 while (true) {
2375 Expected<BitstreamEntry> MaybeEntry = Stream.advanceSkippingSubblocks();
2376 if (!MaybeEntry)
2377 return MaybeEntry.takeError();
2378 BitstreamEntry Entry = MaybeEntry.get();
2379
2380 switch (Entry.Kind) {
2381 case BitstreamEntry::SubBlock: // Handled for us already.
2382 case BitstreamEntry::Error:
2383 return error("Malformed block");
2384 case BitstreamEntry::EndBlock:
2385 // Once all the constants have been read, go through and resolve forward
2386 // references.
2387 //
2388 // We have to treat shuffles specially because they don't have three
2389 // operands anymore. We need to convert the shuffle mask into an array,
2390 // and we can't convert a forward reference.
2391 for (auto &DelayedShuffle : DelayedShuffles) {
2392 VectorType *OpTy = DelayedShuffle.OpTy;
2393 VectorType *RTy = DelayedShuffle.RTy;
2394 uint64_t Op0Idx = DelayedShuffle.Op0Idx;
2395 uint64_t Op1Idx = DelayedShuffle.Op1Idx;
2396 uint64_t Op2Idx = DelayedShuffle.Op2Idx;
2397 uint64_t CstNo = DelayedShuffle.CstNo;
2398 Constant *Op0 = ValueList.getConstantFwdRef(Op0Idx, OpTy);
2399 Constant *Op1 = ValueList.getConstantFwdRef(Op1Idx, OpTy);
2400 Type *ShufTy =
2401 VectorType::get(Type::getInt32Ty(Context), RTy->getElementCount());
2402 Constant *Op2 = ValueList.getConstantFwdRef(Op2Idx, ShufTy);
2403 if (!ShuffleVectorInst::isValidOperands(Op0, Op1, Op2))
2404 return error("Invalid shufflevector operands");
2405 SmallVector<int, 16> Mask;
2406 ShuffleVectorInst::getShuffleMask(Op2, Mask);
2407 Value *V = ConstantExpr::getShuffleVector(Op0, Op1, Mask);
2408 ValueList.assignValue(V, CstNo, DelayedShuffle.CurFullTy);
2409 }
2410
2411 if (NextCstNo != ValueList.size())
2412 return error("Invalid constant reference");
2413
2414 ValueList.resolveConstantForwardRefs();
2415 return Error::success();
2416 case BitstreamEntry::Record:
2417 // The interesting case.
2418 break;
2419 }
2420
2421 // Read a record.
2422 Record.clear();
2423 Type *VoidType = Type::getVoidTy(Context);
2424 Value *V = nullptr;
2425 Expected<unsigned> MaybeBitCode = Stream.readRecord(Entry.ID, Record);
2426 if (!MaybeBitCode)
2427 return MaybeBitCode.takeError();
2428 switch (unsigned BitCode = MaybeBitCode.get()) {
2429 default: // Default behavior: unknown constant
2430 case bitc::CST_CODE_UNDEF: // UNDEF
2431 V = UndefValue::get(CurTy);
2432 break;
2433 case bitc::CST_CODE_POISON: // POISON
2434 V = PoisonValue::get(CurTy);
2435 break;
2436 case bitc::CST_CODE_SETTYPE: // SETTYPE: [typeid]
2437 if (Record.empty())
2438 return error("Invalid record");
2439 if (Record[0] >= TypeList.size() || !TypeList[Record[0]])
2440 return error("Invalid record");
2441 if (TypeList[Record[0]] == VoidType)
2442 return error("Invalid constant type");
2443 CurFullTy = TypeList[Record[0]];
2444 CurTy = flattenPointerTypes(CurFullTy);
2445 continue; // Skip the ValueList manipulation.
2446 case bitc::CST_CODE_NULL: // NULL
2447 if (CurTy->isVoidTy() || CurTy->isFunctionTy() || CurTy->isLabelTy())
2448 return error("Invalid type for a constant null value");
2449 V = Constant::getNullValue(CurTy);
2450 break;
2451 case bitc::CST_CODE_INTEGER: // INTEGER: [intval]
2452 if (!CurTy->isIntegerTy() || Record.empty())
2453 return error("Invalid record");
2454 V = ConstantInt::get(CurTy, decodeSignRotatedValue(Record[0]));
2455 break;
2456 case bitc::CST_CODE_WIDE_INTEGER: {// WIDE_INTEGER: [n x intval]
2457 if (!CurTy->isIntegerTy() || Record.empty())
2458 return error("Invalid record");
2459
2460 APInt VInt =
2461 readWideAPInt(Record, cast<IntegerType>(CurTy)->getBitWidth());
2462 V = ConstantInt::get(Context, VInt);
2463
2464 break;
2465 }
2466 case bitc::CST_CODE_FLOAT: { // FLOAT: [fpval]
2467 if (Record.empty())
2468 return error("Invalid record");
2469 if (CurTy->isHalfTy())
2470 V = ConstantFP::get(Context, APFloat(APFloat::IEEEhalf(),
2471 APInt(16, (uint16_t)Record[0])));
2472 else if (CurTy->isBFloatTy())
2473 V = ConstantFP::get(Context, APFloat(APFloat::BFloat(),
2474 APInt(16, (uint32_t)Record[0])));
2475 else if (CurTy->isFloatTy())
2476 V = ConstantFP::get(Context, APFloat(APFloat::IEEEsingle(),
2477 APInt(32, (uint32_t)Record[0])));
2478 else if (CurTy->isDoubleTy())
2479 V = ConstantFP::get(Context, APFloat(APFloat::IEEEdouble(),
2480 APInt(64, Record[0])));
2481 else if (CurTy->isX86_FP80Ty()) {
2482 // Bits are not stored the same way as a normal i80 APInt, compensate.
2483 uint64_t Rearrange[2];
2484 Rearrange[0] = (Record[1] & 0xffffLL) | (Record[0] << 16);
2485 Rearrange[1] = Record[0] >> 48;
2486 V = ConstantFP::get(Context, APFloat(APFloat::x87DoubleExtended(),
2487 APInt(80, Rearrange)));
2488 } else if (CurTy->isFP128Ty())
2489 V = ConstantFP::get(Context, APFloat(APFloat::IEEEquad(),
2490 APInt(128, Record)));
2491 else if (CurTy->isPPC_FP128Ty())
2492 V = ConstantFP::get(Context, APFloat(APFloat::PPCDoubleDouble(),
2493 APInt(128, Record)));
2494 else
2495 V = UndefValue::get(CurTy);
2496 break;
2497 }
2498
2499 case bitc::CST_CODE_AGGREGATE: {// AGGREGATE: [n x value number]
2500 if (Record.empty())
2501 return error("Invalid record");
2502
2503 unsigned Size = Record.size();
2504 SmallVector<Constant*, 16> Elts;
2505
2506 if (StructType *STy = dyn_cast<StructType>(CurTy)) {
2507 for (unsigned i = 0; i != Size; ++i)
2508 Elts.push_back(ValueList.getConstantFwdRef(Record[i],
2509 STy->getElementType(i)));
2510 V = ConstantStruct::get(STy, Elts);
2511 } else if (ArrayType *ATy = dyn_cast<ArrayType>(CurTy)) {
2512 Type *EltTy = ATy->getElementType();
2513 for (unsigned i = 0; i != Size; ++i)
2514 Elts.push_back(ValueList.getConstantFwdRef(Record[i], EltTy));
2515 V = ConstantArray::get(ATy, Elts);
2516 } else if (VectorType *VTy = dyn_cast<VectorType>(CurTy)) {
2517 Type *EltTy = VTy->getElementType();
2518 for (unsigned i = 0; i != Size; ++i)
2519 Elts.push_back(ValueList.getConstantFwdRef(Record[i], EltTy));
2520 V = ConstantVector::get(Elts);
2521 } else {
2522 V = UndefValue::get(CurTy);
2523 }
2524 break;
2525 }
2526 case bitc::CST_CODE_STRING: // STRING: [values]
2527 case bitc::CST_CODE_CSTRING: { // CSTRING: [values]
2528 if (Record.empty())
2529 return error("Invalid record");
2530
2531 SmallString<16> Elts(Record.begin(), Record.end());
2532 V = ConstantDataArray::getString(Context, Elts,
2533 BitCode == bitc::CST_CODE_CSTRING);
2534 break;
2535 }
2536 case bitc::CST_CODE_DATA: {// DATA: [n x value]
2537 if (Record.empty())
2538 return error("Invalid record");
2539
2540 Type *EltTy;
2541 if (auto *Array = dyn_cast<ArrayType>(CurTy))
2542 EltTy = Array->getElementType();
2543 else
2544 EltTy = cast<VectorType>(CurTy)->getElementType();
2545 if (EltTy->isIntegerTy(8)) {
2546 SmallVector<uint8_t, 16> Elts(Record.begin(), Record.end());
2547 if (isa<VectorType>(CurTy))
2548 V = ConstantDataVector::get(Context, Elts);
2549 else
2550 V = ConstantDataArray::get(Context, Elts);
2551 } else if (EltTy->isIntegerTy(16)) {
2552 SmallVector<uint16_t, 16> Elts(Record.begin(), Record.end());
2553 if (isa<VectorType>(CurTy))
2554 V = ConstantDataVector::get(Context, Elts);
2555 else
2556 V = ConstantDataArray::get(Context, Elts);
2557 } else if (EltTy->isIntegerTy(32)) {
2558 SmallVector<uint32_t, 16> Elts(Record.begin(), Record.end());
2559 if (isa<VectorType>(CurTy))
2560 V = ConstantDataVector::get(Context, Elts);
2561 else
2562 V = ConstantDataArray::get(Context, Elts);
2563 } else if (EltTy->isIntegerTy(64)) {
2564 SmallVector<uint64_t, 16> Elts(Record.begin(), Record.end());
2565 if (isa<VectorType>(CurTy))
2566 V = ConstantDataVector::get(Context, Elts);
2567 else
2568 V = ConstantDataArray::get(Context, Elts);
2569 } else if (EltTy->isHalfTy()) {
2570 SmallVector<uint16_t, 16> Elts(Record.begin(), Record.end());
2571 if (isa<VectorType>(CurTy))
2572 V = ConstantDataVector::getFP(EltTy, Elts);
2573 else
2574 V = ConstantDataArray::getFP(EltTy, Elts);
2575 } else if (EltTy->isBFloatTy()) {
2576 SmallVector<uint16_t, 16> Elts(Record.begin(), Record.end());
2577 if (isa<VectorType>(CurTy))
2578 V = ConstantDataVector::getFP(EltTy, Elts);
2579 else
2580 V = ConstantDataArray::getFP(EltTy, Elts);
2581 } else if (EltTy->isFloatTy()) {
2582 SmallVector<uint32_t, 16> Elts(Record.begin(), Record.end());
2583 if (isa<VectorType>(CurTy))
2584 V = ConstantDataVector::getFP(EltTy, Elts);
2585 else
2586 V = ConstantDataArray::getFP(EltTy, Elts);
2587 } else if (EltTy->isDoubleTy()) {
2588 SmallVector<uint64_t, 16> Elts(Record.begin(), Record.end());
2589 if (isa<VectorType>(CurTy))
2590 V = ConstantDataVector::getFP(EltTy, Elts);
2591 else
2592 V = ConstantDataArray::getFP(EltTy, Elts);
2593 } else {
2594 return error("Invalid type for value");
2595 }
2596 break;
2597 }
2598 case bitc::CST_CODE_CE_UNOP: { // CE_UNOP: [opcode, opval]
2599 if (Record.size() < 2)
2600 return error("Invalid record");
2601 int Opc = getDecodedUnaryOpcode(Record[0], CurTy);
2602 if (Opc < 0) {
2603 V = UndefValue::get(CurTy); // Unknown unop.
2604 } else {
2605 Constant *LHS = ValueList.getConstantFwdRef(Record[1], CurTy);
2606 unsigned Flags = 0;
2607 V = ConstantExpr::get(Opc, LHS, Flags);
2608 }
2609 break;
2610 }
2611 case bitc::CST_CODE_CE_BINOP: { // CE_BINOP: [opcode, opval, opval]
2612 if (Record.size() < 3)
2613 return error("Invalid record");
2614 int Opc = getDecodedBinaryOpcode(Record[0], CurTy);
2615 if (Opc < 0) {
2616 V = UndefValue::get(CurTy); // Unknown binop.
2617 } else {
2618 Constant *LHS = ValueList.getConstantFwdRef(Record[1], CurTy);
2619 Constant *RHS = ValueList.getConstantFwdRef(Record[2], CurTy);
2620 unsigned Flags = 0;
2621 if (Record.size() >= 4) {
2622 if (Opc == Instruction::Add ||
2623 Opc == Instruction::Sub ||
2624 Opc == Instruction::Mul ||
2625 Opc == Instruction::Shl) {
2626 if (Record[3] & (1 << bitc::OBO_NO_SIGNED_WRAP))
2627 Flags |= OverflowingBinaryOperator::NoSignedWrap;
2628 if (Record[3] & (1 << bitc::OBO_NO_UNSIGNED_WRAP))
2629 Flags |= OverflowingBinaryOperator::NoUnsignedWrap;
2630 } else if (Opc == Instruction::SDiv ||
2631 Opc == Instruction::UDiv ||
2632 Opc == Instruction::LShr ||
2633 Opc == Instruction::AShr) {
2634 if (Record[3] & (1 << bitc::PEO_EXACT))
2635 Flags |= SDivOperator::IsExact;
2636 }
2637 }
2638 V = ConstantExpr::get(Opc, LHS, RHS, Flags);
2639 }
2640 break;
2641 }
2642 case bitc::CST_CODE_CE_CAST: { // CE_CAST: [opcode, opty, opval]
2643 if (Record.size() < 3)
2644 return error("Invalid record");
2645 int Opc = getDecodedCastOpcode(Record[0]);
2646 if (Opc < 0) {
2647 V = UndefValue::get(CurTy); // Unknown cast.
2648 } else {
2649 Type *OpTy = getTypeByID(Record[1]);
2650 if (!OpTy)
2651 return error("Invalid record");
2652 Constant *Op = ValueList.getConstantFwdRef(Record[2], OpTy);
2653 V = UpgradeBitCastExpr(Opc, Op, CurTy);
2654 if (!V) V = ConstantExpr::getCast(Opc, Op, CurTy);
2655 }
2656 break;
2657 }
2658 case bitc::CST_CODE_CE_INBOUNDS_GEP: // [ty, n x operands]
2659 case bitc::CST_CODE_CE_GEP: // [ty, n x operands]
2660 case bitc::CST_CODE_CE_GEP_WITH_INRANGE_INDEX: { // [ty, flags, n x
2661 // operands]
2662 unsigned OpNum = 0;
2663 Type *PointeeType = nullptr;
2664 if (BitCode == bitc::CST_CODE_CE_GEP_WITH_INRANGE_INDEX ||
2665 Record.size() % 2)
2666 PointeeType = getTypeByID(Record[OpNum++]);
2667
2668 bool InBounds = false;
2669 Optional<unsigned> InRangeIndex;
2670 if (BitCode == bitc::CST_CODE_CE_GEP_WITH_INRANGE_INDEX) {
2671 uint64_t Op = Record[OpNum++];
2672 InBounds = Op & 1;
2673 InRangeIndex = Op >> 1;
2674 } else if (BitCode == bitc::CST_CODE_CE_INBOUNDS_GEP)
2675 InBounds = true;
2676
2677 SmallVector<Constant*, 16> Elts;
2678 Type *Elt0FullTy = nullptr;
2679 while (OpNum != Record.size()) {
2680 if (!Elt0FullTy)
2681 Elt0FullTy = getFullyStructuredTypeByID(Record[OpNum]);
2682 Type *ElTy = getTypeByID(Record[OpNum++]);
2683 if (!ElTy)
2684 return error("Invalid record");
2685 Elts.push_back(ValueList.getConstantFwdRef(Record[OpNum++], ElTy));
2686 }
2687
2688 if (Elts.size() < 1)
2689 return error("Invalid gep with no operands");
2690
2691 Type *ImplicitPointeeType =
2692 getPointerElementFlatType(Elt0FullTy->getScalarType());
2693 if (!PointeeType)
2694 PointeeType = ImplicitPointeeType;
2695 else if (PointeeType != ImplicitPointeeType)
2696 return error("Explicit gep operator type does not match pointee type "
2697 "of pointer operand");
2698
2699 ArrayRef<Constant *> Indices(Elts.begin() + 1, Elts.end());
2700 V = ConstantExpr::getGetElementPtr(PointeeType, Elts[0], Indices,
2701 InBounds, InRangeIndex);
2702 break;
2703 }
2704 case bitc::CST_CODE_CE_SELECT: { // CE_SELECT: [opval#, opval#, opval#]
2705 if (Record.size() < 3)
2706 return error("Invalid record");
2707
2708 Type *SelectorTy = Type::getInt1Ty(Context);
2709
2710 // The selector might be an i1, an <n x i1>, or a <vscale x n x i1>
2711 // Get the type from the ValueList before getting a forward ref.
2712 if (VectorType *VTy = dyn_cast<VectorType>(CurTy))
2713 if (Value *V = ValueList[Record[0]])
2714 if (SelectorTy != V->getType())
2715 SelectorTy = VectorType::get(SelectorTy,
2716 VTy->getElementCount());
2717
2718 V = ConstantExpr::getSelect(ValueList.getConstantFwdRef(Record[0],
2719 SelectorTy),
2720 ValueList.getConstantFwdRef(Record[1],CurTy),
2721 ValueList.getConstantFwdRef(Record[2],CurTy));
2722 break;
2723 }
2724 case bitc::CST_CODE_CE_EXTRACTELT
2725 : { // CE_EXTRACTELT: [opty, opval, opty, opval]
2726 if (Record.size() < 3)
2727 return error("Invalid record");
2728 VectorType *OpTy =
2729 dyn_cast_or_null<VectorType>(getTypeByID(Record[0]));
2730 if (!OpTy)
2731 return error("Invalid record");
2732 Constant *Op0 = ValueList.getConstantFwdRef(Record[1], OpTy);
2733 Constant *Op1 = nullptr;
2734 if (Record.size() == 4) {
2735 Type *IdxTy = getTypeByID(Record[2]);
2736 if (!IdxTy)
2737 return error("Invalid record");
2738 Op1 = ValueList.getConstantFwdRef(Record[3], IdxTy);
2739 } else {
2740 // Deprecated, but still needed to read old bitcode files.
2741 Op1 = ValueList.getConstantFwdRef(Record[2], Type::getInt32Ty(Context));
2742 }
2743 if (!Op1)
2744 return error("Invalid record");
2745 V = ConstantExpr::getExtractElement(Op0, Op1);
2746 break;
2747 }
2748 case bitc::CST_CODE_CE_INSERTELT
2749 : { // CE_INSERTELT: [opval, opval, opty, opval]
2750 VectorType *OpTy = dyn_cast<VectorType>(CurTy);
2751 if (Record.size() < 3 || !OpTy)
2752 return error("Invalid record");
2753 Constant *Op0 = ValueList.getConstantFwdRef(Record[0], OpTy);
2754 Constant *Op1 = ValueList.getConstantFwdRef(Record[1],
2755 OpTy->getElementType());
2756 Constant *Op2 = nullptr;
2757 if (Record.size() == 4) {
2758 Type *IdxTy = getTypeByID(Record[2]);
2759 if (!IdxTy)
2760 return error("Invalid record");
2761 Op2 = ValueList.getConstantFwdRef(Record[3], IdxTy);
2762 } else {
2763 // Deprecated, but still needed to read old bitcode files.
2764 Op2 = ValueList.getConstantFwdRef(Record[2], Type::getInt32Ty(Context));
2765 }
2766 if (!Op2)
2767 return error("Invalid record");
2768 V = ConstantExpr::getInsertElement(Op0, Op1, Op2);
2769 break;
2770 }
2771 case bitc::CST_CODE_CE_SHUFFLEVEC: { // CE_SHUFFLEVEC: [opval, opval, opval]
2772 VectorType *OpTy = dyn_cast<VectorType>(CurTy);
2773 if (Record.size() < 3 || !OpTy)
2774 return error("Invalid record");
2775 DelayedShuffles.push_back(
2776 {OpTy, OpTy, CurFullTy, Record[0], Record[1], Record[2], NextCstNo});
2777 ++NextCstNo;
2778 continue;
2779 }
2780 case bitc::CST_CODE_CE_SHUFVEC_EX: { // [opty, opval, opval, opval]
2781 VectorType *RTy = dyn_cast<VectorType>(CurTy);
2782 VectorType *OpTy =
2783 dyn_cast_or_null<VectorType>(getTypeByID(Record[0]));
2784 if (Record.size() < 4 || !RTy || !OpTy)
2785 return error("Invalid record");
2786 DelayedShuffles.push_back(
2787 {OpTy, RTy, CurFullTy, Record[1], Record[2], Record[3], NextCstNo});
2788 ++NextCstNo;
2789 continue;
2790 }
2791 case bitc::CST_CODE_CE_CMP: { // CE_CMP: [opty, opval, opval, pred]
2792 if (Record.size() < 4)
2793 return error("Invalid record");
2794 Type *OpTy = getTypeByID(Record[0]);
2795 if (!OpTy)
2796 return error("Invalid record");
2797 Constant *Op0 = ValueList.getConstantFwdRef(Record[1], OpTy);
2798 Constant *Op1 = ValueList.getConstantFwdRef(Record[2], OpTy);
2799
2800 if (OpTy->isFPOrFPVectorTy())
2801 V = ConstantExpr::getFCmp(Record[3], Op0, Op1);
2802 else
2803 V = ConstantExpr::getICmp(Record[3], Op0, Op1);
2804 break;
2805 }
2806 // This maintains backward compatibility, pre-asm dialect keywords.
2807 // Deprecated, but still needed to read old bitcode files.
2808 case bitc::CST_CODE_INLINEASM_OLD: {
2809 if (Record.size() < 2)
2810 return error("Invalid record");
2811 std::string AsmStr, ConstrStr;
2812 bool HasSideEffects = Record[0] & 1;
2813 bool IsAlignStack = Record[0] >> 1;
2814 unsigned AsmStrSize = Record[1];
2815 if (2+AsmStrSize >= Record.size())
2816 return error("Invalid record");
2817 unsigned ConstStrSize = Record[2+AsmStrSize];
2818 if (3+AsmStrSize+ConstStrSize > Record.size())
2819 return error("Invalid record");
2820
2821 for (unsigned i = 0; i != AsmStrSize; ++i)
2822 AsmStr += (char)Record[2+i];
2823 for (unsigned i = 0; i != ConstStrSize; ++i)
2824 ConstrStr += (char)Record[3+AsmStrSize+i];
2825 UpgradeInlineAsmString(&AsmStr);
2826 V = InlineAsm::get(
2827 cast<FunctionType>(getPointerElementFlatType(CurFullTy)), AsmStr,
2828 ConstrStr, HasSideEffects, IsAlignStack);
2829 break;
2830 }
2831 // This version adds support for the asm dialect keywords (e.g.,
2832 // inteldialect).
2833 case bitc::CST_CODE_INLINEASM: {
2834 if (Record.size() < 2)
2835 return error("Invalid record");
2836 std::string AsmStr, ConstrStr;
2837 bool HasSideEffects = Record[0] & 1;
2838 bool IsAlignStack = (Record[0] >> 1) & 1;
2839 unsigned AsmDialect = Record[0] >> 2;
2840 unsigned AsmStrSize = Record[1];
2841 if (2+AsmStrSize >= Record.size())
2842 return error("Invalid record");
2843 unsigned ConstStrSize = Record[2+AsmStrSize];
2844 if (3+AsmStrSize+ConstStrSize > Record.size())
2845 return error("Invalid record");
2846
2847 for (unsigned i = 0; i != AsmStrSize; ++i)
2848 AsmStr += (char)Record[2+i];
2849 for (unsigned i = 0; i != ConstStrSize; ++i)
2850 ConstrStr += (char)Record[3+AsmStrSize+i];
2851 UpgradeInlineAsmString(&AsmStr);
2852 V = InlineAsm::get(
2853 cast<FunctionType>(getPointerElementFlatType(CurFullTy)), AsmStr,
2854 ConstrStr, HasSideEffects, IsAlignStack,
2855 InlineAsm::AsmDialect(AsmDialect));
2856 break;
2857 }
2858 case bitc::CST_CODE_BLOCKADDRESS:{
2859 if (Record.size() < 3)
2860 return error("Invalid record");
2861 Type *FnTy = getTypeByID(Record[0]);
2862 if (!FnTy)
2863 return error("Invalid record");
2864 Function *Fn =
2865 dyn_cast_or_null<Function>(ValueList.getConstantFwdRef(Record[1],FnTy));
2866 if (!Fn)
2867 return error("Invalid record");
2868
2869 // If the function is already parsed we can insert the block address right
2870 // away.
2871 BasicBlock *BB;
2872 unsigned BBID = Record[2];
2873 if (!BBID)
2874 // Invalid reference to entry block.
2875 return error("Invalid ID");
2876 if (!Fn->empty()) {
2877 Function::iterator BBI = Fn->begin(), BBE = Fn->end();
2878 for (size_t I = 0, E = BBID; I != E; ++I) {
2879 if (BBI == BBE)
2880 return error("Invalid ID");
2881 ++BBI;
2882 }
2883 BB = &*BBI;
2884 } else {
2885 // Otherwise insert a placeholder and remember it so it can be inserted
2886 // when the function is parsed.
2887 auto &FwdBBs = BasicBlockFwdRefs[Fn];
2888 if (FwdBBs.empty())
2889 BasicBlockFwdRefQueue.push_back(Fn);
2890 if (FwdBBs.size() < BBID + 1)
2891 FwdBBs.resize(BBID + 1);
2892 if (!FwdBBs[BBID])
2893 FwdBBs[BBID] = BasicBlock::Create(Context);
2894 BB = FwdBBs[BBID];
2895 }
2896 V = BlockAddress::get(Fn, BB);
2897 break;
2898 }
2899 case bitc::CST_CODE_DSO_LOCAL_EQUIVALENT: {
2900 if (Record.size() < 2)
2901 return error("Invalid record");
2902 Type *GVTy = getTypeByID(Record[0]);
2903 if (!GVTy)
2904 return error("Invalid record");
2905 GlobalValue *GV = dyn_cast_or_null<GlobalValue>(
2906 ValueList.getConstantFwdRef(Record[1], GVTy));
2907 if (!GV)
2908 return error("Invalid record");
2909
2910 V = DSOLocalEquivalent::get(GV);
2911 break;
2912 }
2913 }
2914
2915 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-13~++20210413100635+64c24f493e5f/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 2916, __PRETTY_FUNCTION__))
2916 "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-13~++20210413100635+64c24f493e5f/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 2916, __PRETTY_FUNCTION__))
;
2917 ValueList.assignValue(V, NextCstNo, CurFullTy);
2918 ++NextCstNo;
2919 }
2920}
2921
2922Error BitcodeReader::parseUseLists() {
2923 if (Error Err = Stream.EnterSubBlock(bitc::USELIST_BLOCK_ID))
2924 return Err;
2925
2926 // Read all the records.
2927 SmallVector<uint64_t, 64> Record;
2928
2929 while (true) {
2930 Expected<BitstreamEntry> MaybeEntry = Stream.advanceSkippingSubblocks();
2931 if (!MaybeEntry)
2932 return MaybeEntry.takeError();
2933 BitstreamEntry Entry = MaybeEntry.get();
2934
2935 switch (Entry.Kind) {
2936 case BitstreamEntry::SubBlock: // Handled for us already.
2937 case BitstreamEntry::Error:
2938 return error("Malformed block");
2939 case BitstreamEntry::EndBlock:
2940 return Error::success();
2941 case BitstreamEntry::Record:
2942 // The interesting case.
2943 break;
2944 }
2945
2946 // Read a use list record.
2947 Record.clear();
2948 bool IsBB = false;
2949 Expected<unsigned> MaybeRecord = Stream.readRecord(Entry.ID, Record);
2950 if (!MaybeRecord)
2951 return MaybeRecord.takeError();
2952 switch (MaybeRecord.get()) {
2953 default: // Default behavior: unknown type.
2954 break;
2955 case bitc::USELIST_CODE_BB:
2956 IsBB = true;
2957 LLVM_FALLTHROUGH[[gnu::fallthrough]];
2958 case bitc::USELIST_CODE_DEFAULT: {
2959 unsigned RecordLength = Record.size();
2960 if (RecordLength < 3)
2961 // Records should have at least an ID and two indexes.
2962 return error("Invalid record");
2963 unsigned ID = Record.pop_back_val();
2964
2965 Value *V;
2966 if (IsBB) {
2967 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-13~++20210413100635+64c24f493e5f/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 2967, __PRETTY_FUNCTION__))
;
2968 V = FunctionBBs[ID];
2969 } else
2970 V = ValueList[ID];
2971 unsigned NumUses = 0;
2972 SmallDenseMap<const Use *, unsigned, 16> Order;
2973 for (const Use &U : V->materialized_uses()) {
2974 if (++NumUses > Record.size())
2975 break;
2976 Order[&U] = Record[NumUses - 1];
2977 }
2978 if (Order.size() != Record.size() || NumUses > Record.size())
2979 // Mismatches can happen if the functions are being materialized lazily
2980 // (out-of-order), or a value has been upgraded.
2981 break;
2982
2983 V->sortUseList([&](const Use &L, const Use &R) {
2984 return Order.lookup(&L) < Order.lookup(&R);
2985 });
2986 break;
2987 }
2988 }
2989 }
2990}
2991
2992/// When we see the block for metadata, remember where it is and then skip it.
2993/// This lets us lazily deserialize the metadata.
2994Error BitcodeReader::rememberAndSkipMetadata() {
2995 // Save the current stream state.
2996 uint64_t CurBit = Stream.GetCurrentBitNo();
2997 DeferredMetadataInfo.push_back(CurBit);
2998
2999 // Skip over the block for now.
3000 if (Error Err = Stream.SkipBlock())
3001 return Err;
3002 return Error::success();
3003}
3004
3005Error BitcodeReader::materializeMetadata() {
3006 for (uint64_t BitPos : DeferredMetadataInfo) {
3007 // Move the bit stream to the saved position.
3008 if (Error JumpFailed = Stream.JumpToBit(BitPos))
3009 return JumpFailed;
3010 if (Error Err = MDLoader->parseModuleMetadata())
3011 return Err;
3012 }
3013
3014 // Upgrade "Linker Options" module flag to "llvm.linker.options" module-level
3015 // metadata. Only upgrade if the new option doesn't exist to avoid upgrade
3016 // multiple times.
3017 if (!TheModule->getNamedMetadata("llvm.linker.options")) {
3018 if (Metadata *Val = TheModule->getModuleFlag("Linker Options")) {
3019 NamedMDNode *LinkerOpts =
3020 TheModule->getOrInsertNamedMetadata("llvm.linker.options");
3021 for (const MDOperand &MDOptions : cast<MDNode>(Val)->operands())
3022 LinkerOpts->addOperand(cast<MDNode>(MDOptions));
3023 }
3024 }
3025
3026 DeferredMetadataInfo.clear();
3027 return Error::success();
3028}
3029
3030void BitcodeReader::setStripDebugInfo() { StripDebugInfo = true; }
3031
3032/// When we see the block for a function body, remember where it is and then
3033/// skip it. This lets us lazily deserialize the functions.
3034Error BitcodeReader::rememberAndSkipFunctionBody() {
3035 // Get the function we are talking about.
3036 if (FunctionsWithBodies.empty())
3037 return error("Insufficient function protos");
3038
3039 Function *Fn = FunctionsWithBodies.back();
3040 FunctionsWithBodies.pop_back();
3041
3042 // Save the current stream state.
3043 uint64_t CurBit = Stream.GetCurrentBitNo();
3044 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-13~++20210413100635+64c24f493e5f/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 3046, __PRETTY_FUNCTION__))
3045 (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-13~++20210413100635+64c24f493e5f/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 3046, __PRETTY_FUNCTION__))
3046 "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-13~++20210413100635+64c24f493e5f/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 3046, __PRETTY_FUNCTION__))
;
3047 DeferredFunctionInfo[Fn] = CurBit;
3048
3049 // Skip over the function block for now.
3050 if (Error Err = Stream.SkipBlock())
3051 return Err;
3052 return Error::success();
3053}
3054
3055Error BitcodeReader::globalCleanup() {
3056 // Patch the initializers for globals and aliases up.
3057 if (Error Err = resolveGlobalAndIndirectSymbolInits())
3058 return Err;
3059 if (!GlobalInits.empty() || !IndirectSymbolInits.empty())
3060 return error("Malformed global initializer set");
3061
3062 // Look for intrinsic functions which need to be upgraded at some point
3063 // and functions that need to have their function attributes upgraded.
3064 for (Function &F : *TheModule) {
3065 MDLoader->upgradeDebugIntrinsics(F);
3066 Function *NewFn;
3067 if (UpgradeIntrinsicFunction(&F, NewFn))
3068 UpgradedIntrinsics[&F] = NewFn;
3069 else if (auto Remangled = Intrinsic::remangleIntrinsicFunction(&F))
3070 // Some types could be renamed during loading if several modules are
3071 // loaded in the same LLVMContext (LTO scenario). In this case we should
3072 // remangle intrinsics names as well.
3073 RemangledIntrinsics[&F] = Remangled.getValue();
3074 // Look for functions that rely on old function attribute behavior.
3075 UpgradeFunctionAttributes(F);
3076 }
3077
3078 // Look for global variables which need to be renamed.
3079 std::vector<std::pair<GlobalVariable *, GlobalVariable *>> UpgradedVariables;
3080 for (GlobalVariable &GV : TheModule->globals())
3081 if (GlobalVariable *Upgraded = UpgradeGlobalVariable(&GV))
3082 UpgradedVariables.emplace_back(&GV, Upgraded);
3083 for (auto &Pair : UpgradedVariables) {
3084 Pair.first->eraseFromParent();
3085 TheModule->getGlobalList().push_back(Pair.second);
3086 }
3087
3088 // Force deallocation of memory for these vectors to favor the client that
3089 // want lazy deserialization.
3090 std::vector<std::pair<GlobalVariable *, unsigned>>().swap(GlobalInits);
3091 std::vector<std::pair<GlobalIndirectSymbol *, unsigned>>().swap(
3092 IndirectSymbolInits);
3093 return Error::success();
3094}
3095
3096/// Support for lazy parsing of function bodies. This is required if we
3097/// either have an old bitcode file without a VST forward declaration record,
3098/// or if we have an anonymous function being materialized, since anonymous
3099/// functions do not have a name and are therefore not in the VST.
3100Error BitcodeReader::rememberAndSkipFunctionBodies() {
3101 if (Error JumpFailed = Stream.JumpToBit(NextUnreadBit))
3102 return JumpFailed;
3103
3104 if (Stream.AtEndOfStream())
3105 return error("Could not find function in stream");
3106
3107 if (!SeenFirstFunctionBody)
3108 return error("Trying to materialize functions before seeing function blocks");
3109
3110 // An old bitcode file with the symbol table at the end would have
3111 // finished the parse greedily.
3112 assert(SeenValueSymbolTable)((SeenValueSymbolTable) ? static_cast<void> (0) : __assert_fail
("SeenValueSymbolTable", "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 3112, __PRETTY_FUNCTION__))
;
3113
3114 SmallVector<uint64_t, 64> Record;
3115
3116 while (true) {
3117 Expected<llvm::BitstreamEntry> MaybeEntry = Stream.advance();
3118 if (!MaybeEntry)
3119 return MaybeEntry.takeError();
3120 llvm::BitstreamEntry Entry = MaybeEntry.get();
3121
3122 switch (Entry.Kind) {
3123 default:
3124 return error("Expect SubBlock");
3125 case BitstreamEntry::SubBlock:
3126 switch (Entry.ID) {
3127 default:
3128 return error("Expect function block");
3129 case bitc::FUNCTION_BLOCK_ID:
3130 if (Error Err = rememberAndSkipFunctionBody())
3131 return Err;
3132 NextUnreadBit = Stream.GetCurrentBitNo();
3133 return Error::success();
3134 }
3135 }
3136 }
3137}
3138
3139bool BitcodeReaderBase::readBlockInfo() {
3140 Expected<Optional<BitstreamBlockInfo>> MaybeNewBlockInfo =
3141 Stream.ReadBlockInfoBlock();
3142 if (!MaybeNewBlockInfo)
3143 return true; // FIXME Handle the error.
3144 Optional<BitstreamBlockInfo> NewBlockInfo =
3145 std::move(MaybeNewBlockInfo.get());
3146 if (!NewBlockInfo)
3147 return true;
3148 BlockInfo = std::move(*NewBlockInfo);
3149 return false;
3150}
3151
3152Error BitcodeReader::parseComdatRecord(ArrayRef<uint64_t> Record) {
3153 // v1: [selection_kind, name]
3154 // v2: [strtab_offset, strtab_size, selection_kind]
3155 StringRef Name;
3156 std::tie(Name, Record) = readNameFromStrtab(Record);
3157
3158 if (Record.empty())
3159 return error("Invalid record");
3160 Comdat::SelectionKind SK = getDecodedComdatSelectionKind(Record[0]);
3161 std::string OldFormatName;
3162 if (!UseStrtab) {
3163 if (Record.size() < 2)
3164 return error("Invalid record");
3165 unsigned ComdatNameSize = Record[1];
3166 OldFormatName.reserve(ComdatNameSize);
3167 for (unsigned i = 0; i != ComdatNameSize; ++i)
3168 OldFormatName += (char)Record[2 + i];
3169 Name = OldFormatName;
3170 }
3171 Comdat *C = TheModule->getOrInsertComdat(Name);
3172 C->setSelectionKind(SK);
3173 ComdatList.push_back(C);
3174 return Error::success();
3175}
3176
3177static void inferDSOLocal(GlobalValue *GV) {
3178 // infer dso_local from linkage and visibility if it is not encoded.
3179 if (GV->hasLocalLinkage() ||
3180 (!GV->hasDefaultVisibility() && !GV->hasExternalWeakLinkage()))
3181 GV->setDSOLocal(true);
3182}
3183
3184Error BitcodeReader::parseGlobalVarRecord(ArrayRef<uint64_t> Record) {
3185 // v1: [pointer type, isconst, initid, linkage, alignment, section,
3186 // visibility, threadlocal, unnamed_addr, externally_initialized,
3187 // dllstorageclass, comdat, attributes, preemption specifier,
3188 // partition strtab offset, partition strtab size] (name in VST)
3189 // v2: [strtab_offset, strtab_size, v1]
3190 StringRef Name;
3191 std::tie(Name, Record) = readNameFromStrtab(Record);
3192
3193 if (Record.size() < 6)
3194 return error("Invalid record");
3195 Type *FullTy = getFullyStructuredTypeByID(Record[0]);
3196 Type *Ty = flattenPointerTypes(FullTy);
3197 if (!Ty)
3198 return error("Invalid record");
3199 bool isConstant = Record[1] & 1;
3200 bool explicitType = Record[1] & 2;
3201 unsigned AddressSpace;
3202 if (explicitType) {
3203 AddressSpace = Record[1] >> 2;
3204 } else {
3205 if (!Ty->isPointerTy())
3206 return error("Invalid type for value");
3207 AddressSpace = cast<PointerType>(Ty)->getAddressSpace();
3208 std::tie(FullTy, Ty) = getPointerElementTypes(FullTy);
3209 }
3210
3211 uint64_t RawLinkage = Record[3];
3212 GlobalValue::LinkageTypes Linkage = getDecodedLinkage(RawLinkage);
3213 MaybeAlign Alignment;
3214 if (Error Err = parseAlignmentValue(Record[4], Alignment))
3215 return Err;
3216 std::string Section;
3217 if (Record[5]) {
3218 if (Record[5] - 1 >= SectionTable.size())
3219 return error("Invalid ID");
3220 Section = SectionTable[Record[5] - 1];
3221 }
3222 GlobalValue::VisibilityTypes Visibility = GlobalValue::DefaultVisibility;
3223 // Local linkage must have default visibility.
3224 // auto-upgrade `hidden` and `protected` for old bitcode.
3225 if (Record.size() > 6 && !GlobalValue::isLocalLinkage(Linkage))
3226 Visibility = getDecodedVisibility(Record[6]);
3227
3228 GlobalVariable::ThreadLocalMode TLM = GlobalVariable::NotThreadLocal;
3229 if (Record.size() > 7)
3230 TLM = getDecodedThreadLocalMode(Record[7]);
3231
3232 GlobalValue::UnnamedAddr UnnamedAddr = GlobalValue::UnnamedAddr::None;
3233 if (Record.size() > 8)
3234 UnnamedAddr = getDecodedUnnamedAddrType(Record[8]);
3235
3236 bool ExternallyInitialized = false;
3237 if (Record.size() > 9)
3238 ExternallyInitialized = Record[9];
3239
3240 GlobalVariable *NewGV =
3241 new GlobalVariable(*TheModule, Ty, isConstant, Linkage, nullptr, Name,
3242 nullptr, TLM, AddressSpace, ExternallyInitialized);
3243 NewGV->setAlignment(Alignment);
3244 if (!Section.empty())
3245 NewGV->setSection(Section);
3246 NewGV->setVisibility(Visibility);
3247 NewGV->setUnnamedAddr(UnnamedAddr);
3248
3249 if (Record.size() > 10)
3250 NewGV->setDLLStorageClass(getDecodedDLLStorageClass(Record[10]));
3251 else
3252 upgradeDLLImportExportLinkage(NewGV, RawLinkage);
3253
3254 FullTy = PointerType::get(FullTy, AddressSpace);
3255 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-13~++20210413100635+64c24f493e5f/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 3256, __PRETTY_FUNCTION__))
3256 "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-13~++20210413100635+64c24f493e5f/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 3256, __PRETTY_FUNCTION__))
;
3257 ValueList.push_back(NewGV, FullTy);
3258
3259 // Remember which value to use for the global initializer.
3260 if (unsigned InitID = Record[2])
3261 GlobalInits.push_back(std::make_pair(NewGV, InitID - 1));
3262
3263 if (Record.size() > 11) {
3264 if (unsigned ComdatID = Record[11]) {
3265 if (ComdatID > ComdatList.size())
3266 return error("Invalid global variable comdat ID");
3267 NewGV->setComdat(ComdatList[ComdatID - 1]);
3268 }
3269 } else if (hasImplicitComdat(RawLinkage)) {
3270 NewGV->setComdat(reinterpret_cast<Comdat *>(1));
3271 }
3272
3273 if (Record.size() > 12) {
3274 auto AS = getAttributes(Record[12]).getFnAttributes();
3275 NewGV->setAttributes(AS);
3276 }
3277
3278 if (Record.size() > 13) {
3279 NewGV->setDSOLocal(getDecodedDSOLocal(Record[13]));
3280 }
3281 inferDSOLocal(NewGV);
3282
3283 // Check whether we have enough values to read a partition name.
3284 if (Record.size() > 15)
3285 NewGV->setPartition(StringRef(Strtab.data() + Record[14], Record[15]));
3286
3287 return Error::success();
3288}
3289
3290Error BitcodeReader::parseFunctionRecord(ArrayRef<uint64_t> Record) {
3291 // v1: [type, callingconv, isproto, linkage, paramattr, alignment, section,
3292 // visibility, gc, unnamed_addr, prologuedata, dllstorageclass, comdat,
3293 // prefixdata, personalityfn, preemption specifier, addrspace] (name in VST)
3294 // v2: [strtab_offset, strtab_size, v1]
3295 StringRef Name;
3296 std::tie(Name, Record) = readNameFromStrtab(Record);
3297
3298 if (Record.size() < 8)
3299 return error("Invalid record");
3300 Type *FullFTy = getFullyStructuredTypeByID(Record[0]);
3301 Type *FTy = flattenPointerTypes(FullFTy);
3302 if (!FTy)
3303 return error("Invalid record");
3304 if (isa<PointerType>(FTy))
3305 std::tie(FullFTy, FTy) = getPointerElementTypes(FullFTy);
3306
3307 if (!isa<FunctionType>(FTy))
3308 return error("Invalid type for value");
3309 auto CC = static_cast<CallingConv::ID>(Record[1]);
3310 if (CC & ~CallingConv::MaxID)
3311 return error("Invalid calling convention ID");
3312
3313 unsigned AddrSpace = TheModule->getDataLayout().getProgramAddressSpace();
3314 if (Record.size() > 16)
3315 AddrSpace = Record[16];
3316
3317 Function *Func =
3318 Function::Create(cast<FunctionType>(FTy), GlobalValue::ExternalLinkage,
3319 AddrSpace, Name, TheModule);
3320
3321 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-13~++20210413100635+64c24f493e5f/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 3322, __PRETTY_FUNCTION__))
3322 "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-13~++20210413100635+64c24f493e5f/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 3322, __PRETTY_FUNCTION__))
;
3323 FunctionTypes[Func] = cast<FunctionType>(FullFTy);
3324
3325 Func->setCallingConv(CC);
3326 bool isProto = Record[2];
3327 uint64_t RawLinkage = Record[3];
3328 Func->setLinkage(getDecodedLinkage(RawLinkage));
3329 Func->setAttributes(getAttributes(Record[4]));
3330
3331 // Upgrade any old-style byval or sret without a type by propagating the
3332 // argument's pointee type. There should be no opaque pointers where the byval
3333 // type is implicit.
3334 for (unsigned i = 0; i != Func->arg_size(); ++i) {
3335 for (Attribute::AttrKind Kind : {Attribute::ByVal, Attribute::StructRet,
3336 Attribute::InAlloca}) {
3337 if (!Func->hasParamAttribute(i, Kind))
3338 continue;
3339
3340 Func->removeParamAttr(i, Kind);
3341
3342 Type *PTy = cast<FunctionType>(FullFTy)->getParamType(i);
3343 Type *PtrEltTy = getPointerElementFlatType(PTy);
3344 Attribute NewAttr;
3345 switch (Kind) {
3346 case Attribute::ByVal:
3347 NewAttr = Attribute::getWithByValType(Context, PtrEltTy);
3348 break;
3349 case Attribute::StructRet:
3350 NewAttr = Attribute::getWithStructRetType(Context, PtrEltTy);
3351 break;
3352 case Attribute::InAlloca:
3353 NewAttr = Attribute::getWithInAllocaType(Context, PtrEltTy);
3354 break;
3355 default:
3356 llvm_unreachable("not an upgraded type attribute")::llvm::llvm_unreachable_internal("not an upgraded type attribute"
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 3356)
;
3357 }
3358
3359 Func->addParamAttr(i, NewAttr);
3360 }
3361 }
3362
3363 MaybeAlign Alignment;
3364 if (Error Err = parseAlignmentValue(Record[5], Alignment))
3365 return Err;
3366 Func->setAlignment(Alignment);
3367 if (Record[6]) {
3368 if (Record[6] - 1 >= SectionTable.size())
3369 return error("Invalid ID");
3370 Func->setSection(SectionTable[Record[6] - 1]);
3371 }
3372 // Local linkage must have default visibility.
3373 // auto-upgrade `hidden` and `protected` for old bitcode.
3374 if (!Func->hasLocalLinkage())
3375 Func->setVisibility(getDecodedVisibility(Record[7]));
3376 if (Record.size() > 8 && Record[8]) {
3377 if (Record[8] - 1 >= GCTable.size())
3378 return error("Invalid ID");
3379 Func->setGC(GCTable[Record[8] - 1]);
3380 }
3381 GlobalValue::UnnamedAddr UnnamedAddr = GlobalValue::UnnamedAddr::None;
3382 if (Record.size() > 9)
3383 UnnamedAddr = getDecodedUnnamedAddrType(Record[9]);
3384 Func->setUnnamedAddr(UnnamedAddr);
3385 if (Record.size() > 10 && Record[10] != 0)
3386 FunctionPrologues.push_back(std::make_pair(Func, Record[10] - 1));
3387
3388 if (Record.size() > 11)
3389 Func->setDLLStorageClass(getDecodedDLLStorageClass(Record[11]));
3390 else
3391 upgradeDLLImportExportLinkage(Func, RawLinkage);
3392
3393 if (Record.size() > 12) {
3394 if (unsigned ComdatID = Record[12]) {
3395 if (ComdatID > ComdatList.size())
3396 return error("Invalid function comdat ID");
3397 Func->setComdat(ComdatList[ComdatID - 1]);
3398 }
3399 } else if (hasImplicitComdat(RawLinkage)) {
3400 Func->setComdat(reinterpret_cast<Comdat *>(1));
3401 }
3402
3403 if (Record.size() > 13 && Record[13] != 0)
3404 FunctionPrefixes.push_back(std::make_pair(Func, Record[13] - 1));
3405
3406 if (Record.size() > 14 && Record[14] != 0)
3407 FunctionPersonalityFns.push_back(std::make_pair(Func, Record[14] - 1));
3408
3409 if (Record.size() > 15) {
3410 Func->setDSOLocal(getDecodedDSOLocal(Record[15]));
3411 }
3412 inferDSOLocal(Func);
3413
3414 // Record[16] is the address space number.
3415
3416 // Check whether we have enough values to read a partition name.
3417 if (Record.size() > 18)
3418 Func->setPartition(StringRef(Strtab.data() + Record[17], Record[18]));
3419
3420 Type *FullTy = PointerType::get(FullFTy, AddrSpace);
3421 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-13~++20210413100635+64c24f493e5f/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 3422, __PRETTY_FUNCTION__))
3422 "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-13~++20210413100635+64c24f493e5f/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 3422, __PRETTY_FUNCTION__))
;
3423 ValueList.push_back(Func, FullTy);
3424
3425 // If this is a function with a body, remember the prototype we are
3426 // creating now, so that we can match up the body with them later.
3427 if (!isProto) {
3428 Func->setIsMaterializable(true);
3429 FunctionsWithBodies.push_back(Func);
3430 DeferredFunctionInfo[Func] = 0;
3431 }
3432 return Error::success();
3433}
3434
3435Error BitcodeReader::parseGlobalIndirectSymbolRecord(
3436 unsigned BitCode, ArrayRef<uint64_t> Record) {
3437 // v1 ALIAS_OLD: [alias type, aliasee val#, linkage] (name in VST)
3438 // v1 ALIAS: [alias type, addrspace, aliasee val#, linkage, visibility,
3439 // dllstorageclass, threadlocal, unnamed_addr,
3440 // preemption specifier] (name in VST)
3441 // v1 IFUNC: [alias type, addrspace, aliasee val#, linkage,
3442 // visibility, dllstorageclass, threadlocal, unnamed_addr,
3443 // preemption specifier] (name in VST)
3444 // v2: [strtab_offset, strtab_size, v1]
3445 StringRef Name;
3446 std::tie(Name, Record) = readNameFromStrtab(Record);
3447
3448 bool NewRecord = BitCode != bitc::MODULE_CODE_ALIAS_OLD;
3449 if (Record.size() < (3 + (unsigned)NewRecord))
3450 return error("Invalid record");
3451 unsigned OpNum = 0;
3452 Type *FullTy = getFullyStructuredTypeByID(Record[OpNum++]);
3453 Type *Ty = flattenPointerTypes(FullTy);
3454 if (!Ty)
3455 return error("Invalid record");
3456
3457 unsigned AddrSpace;
3458 if (!NewRecord) {
3459 auto *PTy = dyn_cast<PointerType>(Ty);
3460 if (!PTy)
3461 return error("Invalid type for value");
3462 std::tie(FullTy, Ty) = getPointerElementTypes(FullTy);
3463 AddrSpace = PTy->getAddressSpace();
3464 } else {
3465 AddrSpace = Record[OpNum++];
3466 }
3467
3468 auto Val = Record[OpNum++];
3469 auto Linkage = Record[OpNum++];
3470 GlobalIndirectSymbol *NewGA;
3471 if (BitCode == bitc::MODULE_CODE_ALIAS ||
3472 BitCode == bitc::MODULE_CODE_ALIAS_OLD)
3473 NewGA = GlobalAlias::create(Ty, AddrSpace, getDecodedLinkage(Linkage), Name,
3474 TheModule);
3475 else
3476 NewGA = GlobalIFunc::create(Ty, AddrSpace, getDecodedLinkage(Linkage), Name,
3477 nullptr, TheModule);
3478
3479 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-13~++20210413100635+64c24f493e5f/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 3480, __PRETTY_FUNCTION__))
3480 "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-13~++20210413100635+64c24f493e5f/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 3480, __PRETTY_FUNCTION__))
;
3481 // Local linkage must have default visibility.
3482 // auto-upgrade `hidden` and `protected` for old bitcode.
3483 if (OpNum != Record.size()) {
3484 auto VisInd = OpNum++;
3485 if (!NewGA->hasLocalLinkage())
3486 NewGA->setVisibility(getDecodedVisibility(Record[VisInd]));
3487 }
3488 if (BitCode == bitc::MODULE_CODE_ALIAS ||
3489 BitCode == bitc::MODULE_CODE_ALIAS_OLD) {
3490 if (OpNum != Record.size())
3491 NewGA->setDLLStorageClass(getDecodedDLLStorageClass(Record[OpNum++]));
3492 else
3493 upgradeDLLImportExportLinkage(NewGA, Linkage);
3494 if (OpNum != Record.size())
3495 NewGA->setThreadLocalMode(getDecodedThreadLocalMode(Record[OpNum++]));
3496 if (OpNum != Record.size())
3497 NewGA->setUnnamedAddr(getDecodedUnnamedAddrType(Record[OpNum++]));
3498 }
3499 if (OpNum != Record.size())
3500 NewGA->setDSOLocal(getDecodedDSOLocal(Record[OpNum++]));
3501 inferDSOLocal(NewGA);
3502
3503 // Check whether we have enough values to read a partition name.
3504 if (OpNum + 1 < Record.size()) {
3505 NewGA->setPartition(
3506 StringRef(Strtab.data() + Record[OpNum], Record[OpNum + 1]));
3507 OpNum += 2;
Value stored to 'OpNum' is never read
3508 }
3509
3510 FullTy = PointerType::get(FullTy, AddrSpace);
3511 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-13~++20210413100635+64c24f493e5f/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 3512, __PRETTY_FUNCTION__))
3512 "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-13~++20210413100635+64c24f493e5f/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 3512, __PRETTY_FUNCTION__))
;
3513 ValueList.push_back(NewGA, FullTy);
3514 IndirectSymbolInits.push_back(std::make_pair(NewGA, Val));
3515 return Error::success();
3516}
3517
3518Error BitcodeReader::parseModule(uint64_t ResumeBit,
3519 bool ShouldLazyLoadMetadata,
3520 DataLayoutCallbackTy DataLayoutCallback) {
3521 if (ResumeBit) {
3522 if (Error JumpFailed = Stream.JumpToBit(ResumeBit))
3523 return JumpFailed;
3524 } else if (Error Err = Stream.EnterSubBlock(bitc::MODULE_BLOCK_ID))
3525 return Err;
3526
3527 SmallVector<uint64_t, 64> Record;
3528
3529 // Parts of bitcode parsing depend on the datalayout. Make sure we
3530 // finalize the datalayout before we run any of that code.
3531 bool ResolvedDataLayout = false;
3532 auto ResolveDataLayout = [&] {
3533 if (ResolvedDataLayout)
3534 return;
3535
3536 // datalayout and triple can't be parsed after this point.
3537 ResolvedDataLayout = true;
3538
3539 // Upgrade data layout string.
3540 std::string DL = llvm::UpgradeDataLayoutString(
3541 TheModule->getDataLayoutStr(), TheModule->getTargetTriple());
3542 TheModule->setDataLayout(DL);
3543
3544 if (auto LayoutOverride =
3545 DataLayoutCallback(TheModule->getTargetTriple()))
3546 TheModule->setDataLayout(*LayoutOverride);
3547 };
3548
3549 // Read all the records for this module.
3550 while (true) {
3551 Expected<llvm::BitstreamEntry> MaybeEntry = Stream.advance();
3552 if (!MaybeEntry)
3553 return MaybeEntry.takeError();
3554 llvm::BitstreamEntry Entry = MaybeEntry.get();
3555
3556 switch (Entry.Kind) {
3557 case BitstreamEntry::Error:
3558 return error("Malformed block");
3559 case BitstreamEntry::EndBlock:
3560 ResolveDataLayout();
3561 return globalCleanup();
3562
3563 case BitstreamEntry::SubBlock:
3564 switch (Entry.ID) {
3565 default: // Skip unknown content.
3566 if (Error Err = Stream.SkipBlock())
3567 return Err;
3568 break;
3569 case bitc::BLOCKINFO_BLOCK_ID:
3570 if (readBlockInfo())
3571 return error("Malformed block");
3572 break;
3573 case bitc::PARAMATTR_BLOCK_ID:
3574 if (Error Err = parseAttributeBlock())
3575 return Err;
3576 break;
3577 case bitc::PARAMATTR_GROUP_BLOCK_ID:
3578 if (Error Err = parseAttributeGroupBlock())
3579 return Err;
3580 break;
3581 case bitc::TYPE_BLOCK_ID_NEW:
3582 if (Error Err = parseTypeTable())
3583 return Err;
3584 break;
3585 case bitc::VALUE_SYMTAB_BLOCK_ID:
3586 if (!SeenValueSymbolTable) {
3587 // Either this is an old form VST without function index and an
3588 // associated VST forward declaration record (which would have caused
3589 // the VST to be jumped to and parsed before it was encountered
3590 // normally in the stream), or there were no function blocks to
3591 // trigger an earlier parsing of the VST.
3592 assert(VSTOffset == 0 || FunctionsWithBodies.empty())((VSTOffset == 0 || FunctionsWithBodies.empty()) ? static_cast
<void> (0) : __assert_fail ("VSTOffset == 0 || FunctionsWithBodies.empty()"
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 3592, __PRETTY_FUNCTION__))
;
3593 if (Error Err = parseValueSymbolTable())
3594 return Err;
3595 SeenValueSymbolTable = true;
3596 } else {
3597 // We must have had a VST forward declaration record, which caused
3598 // the parser to jump to and parse the VST earlier.
3599 assert(VSTOffset > 0)((VSTOffset > 0) ? static_cast<void> (0) : __assert_fail
("VSTOffset > 0", "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 3599, __PRETTY_FUNCTION__))
;
3600 if (Error Err = Stream.SkipBlock())
3601 return Err;
3602 }
3603 break;
3604 case bitc::CONSTANTS_BLOCK_ID:
3605 if (Error Err = parseConstants())
3606 return Err;
3607 if (Error Err = resolveGlobalAndIndirectSymbolInits())
3608 return Err;
3609 break;
3610 case bitc::METADATA_BLOCK_ID:
3611 if (ShouldLazyLoadMetadata) {
3612 if (Error Err = rememberAndSkipMetadata())
3613 return Err;
3614 break;
3615 }
3616 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-13~++20210413100635+64c24f493e5f/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 3616, __PRETTY_FUNCTION__))
;
3617 if (Error Err = MDLoader->parseModuleMetadata())
3618 return Err;
3619 break;
3620 case bitc::METADATA_KIND_BLOCK_ID:
3621 if (Error Err = MDLoader->parseMetadataKinds())
3622 return Err;
3623 break;
3624 case bitc::FUNCTION_BLOCK_ID:
3625 ResolveDataLayout();
3626
3627 // If this is the first function body we've seen, reverse the
3628 // FunctionsWithBodies list.
3629 if (!SeenFirstFunctionBody) {
3630 std::reverse(FunctionsWithBodies.begin(), FunctionsWithBodies.end());
3631 if (Error Err = globalCleanup())
3632 return Err;
3633 SeenFirstFunctionBody = true;
3634 }
3635
3636 if (VSTOffset > 0) {
3637 // If we have a VST forward declaration record, make sure we
3638 // parse the VST now if we haven't already. It is needed to
3639 // set up the DeferredFunctionInfo vector for lazy reading.
3640 if (!SeenValueSymbolTable) {
3641 if (Error Err = BitcodeReader::parseValueSymbolTable(VSTOffset))
3642 return Err;
3643 SeenValueSymbolTable = true;
3644 // Fall through so that we record the NextUnreadBit below.
3645 // This is necessary in case we have an anonymous function that
3646 // is later materialized. Since it will not have a VST entry we
3647 // need to fall back to the lazy parse to find its offset.
3648 } else {
3649 // If we have a VST forward declaration record, but have already
3650 // parsed the VST (just above, when the first function body was
3651 // encountered here), then we are resuming the parse after
3652 // materializing functions. The ResumeBit points to the
3653 // start of the last function block recorded in the
3654 // DeferredFunctionInfo map. Skip it.
3655 if (Error Err = Stream.SkipBlock())
3656 return Err;
3657 continue;
3658 }
3659 }
3660
3661 // Support older bitcode files that did not have the function
3662 // index in the VST, nor a VST forward declaration record, as
3663 // well as anonymous functions that do not have VST entries.
3664 // Build the DeferredFunctionInfo vector on the fly.
3665 if (Error Err = rememberAndSkipFunctionBody())
3666 return Err;
3667
3668 // Suspend parsing when we reach the function bodies. Subsequent
3669 // materialization calls will resume it when necessary. If the bitcode
3670 // file is old, the symbol table will be at the end instead and will not
3671 // have been seen yet. In this case, just finish the parse now.
3672 if (SeenValueSymbolTable) {
3673 NextUnreadBit = Stream.GetCurrentBitNo();
3674 // After the VST has been parsed, we need to make sure intrinsic name
3675 // are auto-upgraded.
3676 return globalCleanup();
3677 }
3678 break;
3679 case bitc::USELIST_BLOCK_ID:
3680 if (Error Err = parseUseLists())
3681 return Err;
3682 break;
3683 case bitc::OPERAND_BUNDLE_TAGS_BLOCK_ID:
3684 if (Error Err = parseOperandBundleTags())
3685 return Err;
3686 break;
3687 case bitc::SYNC_SCOPE_NAMES_BLOCK_ID:
3688 if (Error Err = parseSyncScopeNames())
3689 return Err;
3690 break;
3691 }
3692 continue;
3693
3694 case BitstreamEntry::Record:
3695 // The interesting case.
3696 break;
3697 }
3698
3699 // Read a record.
3700 Expected<unsigned> MaybeBitCode = Stream.readRecord(Entry.ID, Record);
3701 if (!MaybeBitCode)
3702 return MaybeBitCode.takeError();
3703 switch (unsigned BitCode = MaybeBitCode.get()) {
3704 default: break; // Default behavior, ignore unknown content.
3705 case bitc::MODULE_CODE_VERSION: {
3706 Expected<unsigned> VersionOrErr = parseVersionRecord(Record);
3707 if (!VersionOrErr)
3708 return VersionOrErr.takeError();
3709 UseRelativeIDs = *VersionOrErr >= 1;
3710 break;
3711 }
3712 case bitc::MODULE_CODE_TRIPLE: { // TRIPLE: [strchr x N]
3713 if (ResolvedDataLayout)
3714 return error("target triple too late in module");
3715 std::string S;
3716 if (convertToString(Record, 0, S))
3717 return error("Invalid record");
3718 TheModule->setTargetTriple(S);
3719 break;
3720 }
3721 case bitc::MODULE_CODE_DATALAYOUT: { // DATALAYOUT: [strchr x N]
3722 if (ResolvedDataLayout)
3723 return error("datalayout too late in module");
3724 std::string S;
3725 if (convertToString(Record, 0, S))
3726 return error("Invalid record");
3727 TheModule->setDataLayout(S);
3728 break;
3729 }
3730 case bitc::MODULE_CODE_ASM: { // ASM: [strchr x N]
3731 std::string S;
3732 if (convertToString(Record, 0, S))
3733 return error("Invalid record");
3734 TheModule->setModuleInlineAsm(S);
3735 break;
3736 }
3737 case bitc::MODULE_CODE_DEPLIB: { // DEPLIB: [strchr x N]
3738 // Deprecated, but still needed to read old bitcode files.
3739 std::string S;
3740 if (convertToString(Record, 0, S))
3741 return error("Invalid record");
3742 // Ignore value.
3743 break;
3744 }
3745 case bitc::MODULE_CODE_SECTIONNAME: { // SECTIONNAME: [strchr x N]
3746 std::string S;
3747 if (convertToString(Record, 0, S))
3748 return error("Invalid record");
3749 SectionTable.push_back(S);
3750 break;
3751 }
3752 case bitc::MODULE_CODE_GCNAME: { // SECTIONNAME: [strchr x N]
3753 std::string S;
3754 if (convertToString(Record, 0, S))
3755 return error("Invalid record");
3756 GCTable.push_back(S);
3757 break;
3758 }
3759 case bitc::MODULE_CODE_COMDAT:
3760 if (Error Err = parseComdatRecord(Record))
3761 return Err;
3762 break;
3763 case bitc::MODULE_CODE_GLOBALVAR:
3764 if (Error Err = parseGlobalVarRecord(Record))
3765 return Err;
3766 break;
3767 case bitc::MODULE_CODE_FUNCTION:
3768 ResolveDataLayout();
3769 if (Error Err = parseFunctionRecord(Record))
3770 return Err;
3771 break;
3772 case bitc::MODULE_CODE_IFUNC:
3773 case bitc::MODULE_CODE_ALIAS:
3774 case bitc::MODULE_CODE_ALIAS_OLD:
3775 if (Error Err = parseGlobalIndirectSymbolRecord(BitCode, Record))
3776 return Err;
3777 break;
3778 /// MODULE_CODE_VSTOFFSET: [offset]
3779 case bitc::MODULE_CODE_VSTOFFSET:
3780 if (Record.empty())
3781 return error("Invalid record");
3782 // Note that we subtract 1 here because the offset is relative to one word
3783 // before the start of the identification or module block, which was
3784 // historically always the start of the regular bitcode header.
3785 VSTOffset = Record[0] - 1;
3786 break;
3787 /// MODULE_CODE_SOURCE_FILENAME: [namechar x N]
3788 case bitc::MODULE_CODE_SOURCE_FILENAME:
3789 SmallString<128> ValueName;
3790 if (convertToString(Record, 0, ValueName))
3791 return error("Invalid record");
3792 TheModule->setSourceFileName(ValueName);
3793 break;
3794 }
3795 Record.clear();
3796 }
3797}
3798
3799Error BitcodeReader::parseBitcodeInto(Module *M, bool ShouldLazyLoadMetadata,
3800 bool IsImporting,
3801 DataLayoutCallbackTy DataLayoutCallback) {
3802 TheModule = M;
3803 MDLoader = MetadataLoader(Stream, *M, ValueList, IsImporting,
3804 [&](unsigned ID) { return getTypeByID(ID); });
3805 return parseModule(0, ShouldLazyLoadMetadata, DataLayoutCallback);
3806}
3807
3808Error BitcodeReader::typeCheckLoadStoreInst(Type *ValType, Type *PtrType) {
3809 if (!isa<PointerType>(PtrType))
3810 return error("Load/Store operand is not a pointer type");
3811 Type *ElemType = cast<PointerType>(PtrType)->getElementType();
3812
3813 if (ValType && ValType != ElemType)
3814 return error("Explicit load/store type does not match pointee "
3815 "type of pointer operand");
3816 if (!PointerType::isLoadableOrStorableType(ElemType))
3817 return error("Cannot load/store from pointer");
3818 return Error::success();
3819}
3820
3821void BitcodeReader::propagateByValSRetTypes(CallBase *CB,
3822 ArrayRef<Type *> ArgsFullTys) {
3823 for (unsigned i = 0; i != CB->arg_size(); ++i) {
3824 for (Attribute::AttrKind Kind : {Attribute::ByVal, Attribute::StructRet,
3825 Attribute::InAlloca}) {
3826 if (!CB->paramHasAttr(i, Kind))
3827 continue;
3828
3829 CB->removeParamAttr(i, Kind);
3830
3831 Type *PtrEltTy = getPointerElementFlatType(ArgsFullTys[i]);
3832 Attribute NewAttr;
3833 switch (Kind) {
3834 case Attribute::ByVal:
3835 NewAttr = Attribute::getWithByValType(Context, PtrEltTy);
3836 break;
3837 case Attribute::StructRet:
3838 NewAttr = Attribute::getWithStructRetType(Context, PtrEltTy);
3839 break;
3840 case Attribute::InAlloca:
3841 NewAttr = Attribute::getWithInAllocaType(Context, PtrEltTy);
3842 break;
3843 default:
3844 llvm_unreachable("not an upgraded type attribute")::llvm::llvm_unreachable_internal("not an upgraded type attribute"
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 3844)
;
3845 }
3846
3847 CB->addParamAttr(i, NewAttr);
3848 }
3849 }
3850}
3851
3852/// Lazily parse the specified function body block.
3853Error BitcodeReader::parseFunctionBody(Function *F) {
3854 if (Error Err = Stream.EnterSubBlock(bitc::FUNCTION_BLOCK_ID))
3855 return Err;
3856
3857 // Unexpected unresolved metadata when parsing function.
3858 if (MDLoader->hasFwdRefs())
3859 return error("Invalid function metadata: incoming forward references");
3860
3861 InstructionList.clear();
3862 unsigned ModuleValueListSize = ValueList.size();
3863 unsigned ModuleMDLoaderSize = MDLoader->size();
3864
3865 // Add all the function arguments to the value table.
3866 unsigned ArgNo = 0;
3867 FunctionType *FullFTy = FunctionTypes[F];
3868 for (Argument &I : F->args()) {
3869 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-13~++20210413100635+64c24f493e5f/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 3870, __PRETTY_FUNCTION__))
3870 "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-13~++20210413100635+64c24f493e5f/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 3870, __PRETTY_FUNCTION__))
;
3871 ValueList.push_back(&I, FullFTy->getParamType(ArgNo++));
3872 }
3873 unsigned NextValueNo = ValueList.size();
3874 BasicBlock *CurBB = nullptr;
3875 unsigned CurBBNo = 0;
3876
3877 DebugLoc LastLoc;
3878 auto getLastInstruction = [&]() -> Instruction * {
3879 if (CurBB && !CurBB->empty())
3880 return &CurBB->back();
3881 else if (CurBBNo && FunctionBBs[CurBBNo - 1] &&
3882 !FunctionBBs[CurBBNo - 1]->empty())
3883 return &FunctionBBs[CurBBNo - 1]->back();
3884 return nullptr;
3885 };
3886
3887 std::vector<OperandBundleDef> OperandBundles;
3888
3889 // Read all the records.
3890 SmallVector<uint64_t, 64> Record;
3891
3892 while (true) {
3893 Expected<llvm::BitstreamEntry> MaybeEntry = Stream.advance();
3894 if (!MaybeEntry)
3895 return MaybeEntry.takeError();
3896 llvm::BitstreamEntry Entry = MaybeEntry.get();
3897
3898 switch (Entry.Kind) {
3899 case BitstreamEntry::Error:
3900 return error("Malformed block");
3901 case BitstreamEntry::EndBlock:
3902 goto OutOfRecordLoop;
3903
3904 case BitstreamEntry::SubBlock:
3905 switch (Entry.ID) {
3906 default: // Skip unknown content.
3907 if (Error Err = Stream.SkipBlock())
3908 return Err;
3909 break;
3910 case bitc::CONSTANTS_BLOCK_ID:
3911 if (Error Err = parseConstants())
3912 return Err;
3913 NextValueNo = ValueList.size();
3914 break;
3915 case bitc::VALUE_SYMTAB_BLOCK_ID:
3916 if (Error Err = parseValueSymbolTable())
3917 return Err;
3918 break;
3919 case bitc::METADATA_ATTACHMENT_ID:
3920 if (Error Err = MDLoader->parseMetadataAttachment(*F, InstructionList))
3921 return Err;
3922 break;
3923 case bitc::METADATA_BLOCK_ID:
3924 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-13~++20210413100635+64c24f493e5f/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 3925, __PRETTY_FUNCTION__))
3925 "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-13~++20210413100635+64c24f493e5f/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 3925, __PRETTY_FUNCTION__))
;
3926 if (Error Err = MDLoader->parseFunctionMetadata())
3927 return Err;
3928 break;
3929 case bitc::USELIST_BLOCK_ID:
3930 if (Error Err = parseUseLists())
3931 return Err;
3932 break;
3933 }
3934 continue;
3935
3936 case BitstreamEntry::Record:
3937 // The interesting case.
3938 break;
3939 }
3940
3941 // Read a record.
3942 Record.clear();
3943 Instruction *I = nullptr;
3944 Type *FullTy = nullptr;
3945 Expected<unsigned> MaybeBitCode = Stream.readRecord(Entry.ID, Record);
3946 if (!MaybeBitCode)
3947 return MaybeBitCode.takeError();
3948 switch (unsigned BitCode = MaybeBitCode.get()) {
3949 default: // Default behavior: reject
3950 return error("Invalid value");
3951 case bitc::FUNC_CODE_DECLAREBLOCKS: { // DECLAREBLOCKS: [nblocks]
3952 if (Record.empty() || Record[0] == 0)
3953 return error("Invalid record");
3954 // Create all the basic blocks for the function.
3955 FunctionBBs.resize(Record[0]);
3956
3957 // See if anything took the address of blocks in this function.
3958 auto BBFRI = BasicBlockFwdRefs.find(F);
3959 if (BBFRI == BasicBlockFwdRefs.end()) {
3960 for (unsigned i = 0, e = FunctionBBs.size(); i != e; ++i)
3961 FunctionBBs[i] = BasicBlock::Create(Context, "", F);
3962 } else {
3963 auto &BBRefs = BBFRI->second;
3964 // Check for invalid basic block references.
3965 if (BBRefs.size() > FunctionBBs.size())
3966 return error("Invalid ID");
3967 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-13~++20210413100635+64c24f493e5f/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 3967, __PRETTY_FUNCTION__))
;
3968 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-13~++20210413100635+64c24f493e5f/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 3968, __PRETTY_FUNCTION__))
;
3969 for (unsigned I = 0, E = FunctionBBs.size(), RE = BBRefs.size(); I != E;
3970 ++I)
3971 if (I < RE && BBRefs[I]) {
3972 BBRefs[I]->insertInto(F);
3973 FunctionBBs[I] = BBRefs[I];
3974 } else {
3975 FunctionBBs[I] = BasicBlock::Create(Context, "", F);
3976 }
3977
3978 // Erase from the table.
3979 BasicBlockFwdRefs.erase(BBFRI);
3980 }
3981
3982 CurBB = FunctionBBs[0];
3983 continue;
3984 }
3985
3986 case bitc::FUNC_CODE_DEBUG_LOC_AGAIN: // DEBUG_LOC_AGAIN
3987 // This record indicates that the last instruction is at the same
3988 // location as the previous instruction with a location.
3989 I = getLastInstruction();
3990
3991 if (!I)
3992 return error("Invalid record");
3993 I->setDebugLoc(LastLoc);
3994 I = nullptr;
3995 continue;
3996
3997 case bitc::FUNC_CODE_DEBUG_LOC: { // DEBUG_LOC: [line, col, scope, ia]
3998 I = getLastInstruction();
3999 if (!I || Record.size() < 4)
4000 return error("Invalid record");
4001
4002 unsigned Line = Record[0], Col = Record[1];
4003 unsigned ScopeID = Record[2], IAID = Record[3];
4004 bool isImplicitCode = Record.size() == 5 && Record[4];
4005
4006 MDNode *Scope = nullptr, *IA = nullptr;
4007 if (ScopeID) {
4008 Scope = dyn_cast_or_null<MDNode>(
4009 MDLoader->getMetadataFwdRefOrLoad(ScopeID - 1));
4010 if (!Scope)
4011 return error("Invalid record");
4012 }
4013 if (IAID) {
4014 IA = dyn_cast_or_null<MDNode>(
4015 MDLoader->getMetadataFwdRefOrLoad(IAID - 1));
4016 if (!IA)
4017 return error("Invalid record");
4018 }
4019 LastLoc = DILocation::get(Scope->getContext(), Line, Col, Scope, IA,
4020 isImplicitCode);
4021 I->setDebugLoc(LastLoc);
4022 I = nullptr;
4023 continue;
4024 }
4025 case bitc::FUNC_CODE_INST_UNOP: { // UNOP: [opval, ty, opcode]
4026 unsigned OpNum = 0;
4027 Value *LHS;
4028 if (getValueTypePair(Record, OpNum, NextValueNo, LHS) ||
4029 OpNum+1 > Record.size())
4030 return error("Invalid record");
4031
4032 int Opc = getDecodedUnaryOpcode(Record[OpNum++], LHS->getType());
4033 if (Opc == -1)
4034 return error("Invalid record");
4035 I = UnaryOperator::Create((Instruction::UnaryOps)Opc, LHS);
4036 InstructionList.push_back(I);
4037 if (OpNum < Record.size()) {
4038 if (isa<FPMathOperator>(I)) {
4039 FastMathFlags FMF = getDecodedFastMathFlags(Record[OpNum]);
4040 if (FMF.any())
4041 I->setFastMathFlags(FMF);
4042 }
4043 }
4044 break;
4045 }
4046 case bitc::FUNC_CODE_INST_BINOP: { // BINOP: [opval, ty, opval, opcode]
4047 unsigned OpNum = 0;
4048 Value *LHS, *RHS;
4049 if (getValueTypePair(Record, OpNum, NextValueNo, LHS) ||
4050 popValue(Record, OpNum, NextValueNo, LHS->getType(), RHS) ||
4051 OpNum+1 > Record.size())
4052 return error("Invalid record");
4053
4054 int Opc = getDecodedBinaryOpcode(Record[OpNum++], LHS->getType());
4055 if (Opc == -1)
4056 return error("Invalid record");
4057 I = BinaryOperator::Create((Instruction::BinaryOps)Opc, LHS, RHS);
4058 InstructionList.push_back(I);
4059 if (OpNum < Record.size()) {
4060 if (Opc == Instruction::Add ||
4061 Opc == Instruction::Sub ||
4062 Opc == Instruction::Mul ||
4063 Opc == Instruction::Shl) {
4064 if (Record[OpNum] & (1 << bitc::OBO_NO_SIGNED_WRAP))
4065 cast<BinaryOperator>(I)->setHasNoSignedWrap(true);
4066 if (Record[OpNum] & (1 << bitc::OBO_NO_UNSIGNED_WRAP))
4067 cast<BinaryOperator>(I)->setHasNoUnsignedWrap(true);
4068 } else if (Opc == Instruction::SDiv ||
4069 Opc == Instruction::UDiv ||
4070 Opc == Instruction::LShr ||
4071 Opc == Instruction::AShr) {
4072 if (Record[OpNum] & (1 << bitc::PEO_EXACT))
4073 cast<BinaryOperator>(I)->setIsExact(true);
4074 } else if (isa<FPMathOperator>(I)) {
4075 FastMathFlags FMF = getDecodedFastMathFlags(Record[OpNum]);
4076 if (FMF.any())
4077 I->setFastMathFlags(FMF);
4078 }
4079
4080 }
4081 break;
4082 }
4083 case bitc::FUNC_CODE_INST_CAST: { // CAST: [opval, opty, destty, castopc]
4084 unsigned OpNum = 0;
4085 Value *Op;
4086 if (getValueTypePair(Record, OpNum, NextValueNo, Op) ||
4087 OpNum+2 != Record.size())
4088 return error("Invalid record");
4089
4090 FullTy = getFullyStructuredTypeByID(Record[OpNum]);
4091 Type *ResTy = flattenPointerTypes(FullTy);
4092 int Opc = getDecodedCastOpcode(Record[OpNum + 1]);
4093 if (Opc == -1 || !ResTy)
4094 return error("Invalid record");
4095 Instruction *Temp = nullptr;
4096 if ((I = UpgradeBitCastInst(Opc, Op, ResTy, Temp))) {
4097 if (Temp) {
4098 InstructionList.push_back(Temp);
4099 assert(CurBB && "No current BB?")((CurBB && "No current BB?") ? static_cast<void>
(0) : __assert_fail ("CurBB && \"No current BB?\"", "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 4099, __PRETTY_FUNCTION__))
;
4100 CurBB->getInstList().push_back(Temp);
4101 }
4102 } else {
4103 auto CastOp = (Instruction::CastOps)Opc;
4104 if (!CastInst::castIsValid(CastOp, Op, ResTy))
4105 return error("Invalid cast");
4106 I = CastInst::Create(CastOp, Op, ResTy);
4107 }
4108 InstructionList.push_back(I);
4109 break;
4110 }
4111 case bitc::FUNC_CODE_INST_INBOUNDS_GEP_OLD:
4112 case bitc::FUNC_CODE_INST_GEP_OLD:
4113 case bitc::FUNC_CODE_INST_GEP: { // GEP: type, [n x operands]
4114 unsigned OpNum = 0;
4115
4116 Type *Ty;
4117 bool InBounds;
4118
4119 if (BitCode == bitc::FUNC_CODE_INST_GEP) {
4120 InBounds = Record[OpNum++];
4121 FullTy = getFullyStructuredTypeByID(Record[OpNum++]);
4122 Ty = flattenPointerTypes(FullTy);
4123 } else {
4124 InBounds = BitCode == bitc::FUNC_CODE_INST_INBOUNDS_GEP_OLD;
4125 Ty = nullptr;
4126 }
4127
4128 Value *BasePtr;
4129 Type *FullBaseTy = nullptr;
4130 if (getValueTypePair(Record, OpNum, NextValueNo, BasePtr, &FullBaseTy))
4131 return error("Invalid record");
4132
4133 if (!Ty) {
4134 std::tie(FullTy, Ty) =
4135 getPointerElementTypes(FullBaseTy->getScalarType());
4136 } else if (Ty != getPointerElementFlatType(FullBaseTy->getScalarType()))
4137 return error(
4138 "Explicit gep type does not match pointee type of pointer operand");
4139
4140 SmallVector<Value*, 16> GEPIdx;
4141 while (OpNum != Record.size()) {
4142 Value *Op;
4143 if (getValueTypePair(Record, OpNum, NextValueNo, Op))
4144 return error("Invalid record");
4145 GEPIdx.push_back(Op);
4146 }
4147
4148 I = GetElementPtrInst::Create(Ty, BasePtr, GEPIdx);
4149 FullTy = GetElementPtrInst::getGEPReturnType(FullTy, I, GEPIdx);
4150
4151 InstructionList.push_back(I);
4152 if (InBounds)
4153 cast<GetElementPtrInst>(I)->setIsInBounds(true);
4154 break;
4155 }
4156
4157 case bitc::FUNC_CODE_INST_EXTRACTVAL: {
4158 // EXTRACTVAL: [opty, opval, n x indices]
4159 unsigned OpNum = 0;
4160 Value *Agg;
4161 if (getValueTypePair(Record, OpNum, NextValueNo, Agg, &FullTy))
4162 return error("Invalid record");
4163
4164 unsigned RecSize = Record.size();
4165 if (OpNum == RecSize)
4166 return error("EXTRACTVAL: Invalid instruction with 0 indices");
4167
4168 SmallVector<unsigned, 4> EXTRACTVALIdx;
4169 for (; OpNum != RecSize; ++OpNum) {
4170 bool IsArray = FullTy->isArrayTy();
4171 bool IsStruct = FullTy->isStructTy();
4172 uint64_t Index = Record[OpNum];
4173
4174 if (!IsStruct && !IsArray)
4175 return error("EXTRACTVAL: Invalid type");
4176 if ((unsigned)Index != Index)
4177 return error("Invalid value");
4178 if (IsStruct && Index >= FullTy->getStructNumElements())
4179 return error("EXTRACTVAL: Invalid struct index");
4180 if (IsArray && Index >= FullTy->getArrayNumElements())
4181 return error("EXTRACTVAL: Invalid array index");
4182 EXTRACTVALIdx.push_back((unsigned)Index);
4183
4184 if (IsStruct)
4185 FullTy = FullTy->getStructElementType(Index);
4186 else
4187 FullTy = FullTy->getArrayElementType();
4188 }
4189
4190 I = ExtractValueInst::Create(Agg, EXTRACTVALIdx);
4191 InstructionList.push_back(I);
4192 break;
4193 }
4194
4195 case bitc::FUNC_CODE_INST_INSERTVAL: {
4196 // INSERTVAL: [opty, opval, opty, opval, n x indices]
4197 unsigned OpNum = 0;
4198 Value *Agg;
4199 if (getValueTypePair(Record, OpNum, NextValueNo, Agg, &FullTy))
4200 return error("Invalid record");
4201 Value *Val;
4202 if (getValueTypePair(Record, OpNum, NextValueNo, Val))
4203 return error("Invalid record");
4204
4205 unsigned RecSize = Record.size();
4206 if (OpNum == RecSize)
4207 return error("INSERTVAL: Invalid instruction with 0 indices");
4208
4209 SmallVector<unsigned, 4> INSERTVALIdx;
4210 Type *CurTy = Agg->getType();
4211 for (; OpNum != RecSize; ++OpNum) {
4212 bool IsArray = CurTy->isArrayTy();
4213 bool IsStruct = CurTy->isStructTy();
4214 uint64_t Index = Record[OpNum];
4215
4216 if (!IsStruct && !IsArray)
4217 return error("INSERTVAL: Invalid type");
4218 if ((unsigned)Index != Index)
4219 return error("Invalid value");
4220 if (IsStruct && Index >= CurTy->getStructNumElements())
4221 return error("INSERTVAL: Invalid struct index");
4222 if (IsArray && Index >= CurTy->getArrayNumElements())
4223 return error("INSERTVAL: Invalid array index");
4224
4225 INSERTVALIdx.push_back((unsigned)Index);
4226 if (IsStruct)
4227 CurTy = CurTy->getStructElementType(Index);
4228 else
4229 CurTy = CurTy->getArrayElementType();
4230 }
4231
4232 if (CurTy != Val->getType())
4233 return error("Inserted value type doesn't match aggregate type");
4234
4235 I = InsertValueInst::Create(Agg, Val, INSERTVALIdx);
4236 InstructionList.push_back(I);
4237 break;
4238 }
4239
4240 case bitc::FUNC_CODE_INST_SELECT: { // SELECT: [opval, ty, opval, opval]
4241 // obsolete form of select
4242 // handles select i1 ... in old bitcode
4243 unsigned OpNum = 0;
4244 Value *TrueVal, *FalseVal, *Cond;
4245 if (getValueTypePair(Record, OpNum, NextValueNo, TrueVal, &FullTy) ||
4246 popValue(Record, OpNum, NextValueNo, TrueVal->getType(), FalseVal) ||
4247 popValue(Record, OpNum, NextValueNo, Type::getInt1Ty(Context), Cond))
4248 return error("Invalid record");
4249
4250 I = SelectInst::Create(Cond, TrueVal, FalseVal);
4251 InstructionList.push_back(I);
4252 break;
4253 }
4254
4255 case bitc::FUNC_CODE_INST_VSELECT: {// VSELECT: [ty,opval,opval,predty,pred]
4256 // new form of select
4257 // handles select i1 or select [N x i1]
4258 unsigned OpNum = 0;
4259 Value *TrueVal, *FalseVal, *Cond;
4260 if (getValueTypePair(Record, OpNum, NextValueNo, TrueVal, &FullTy) ||
4261 popValue(Record, OpNum, NextValueNo, TrueVal->getType(), FalseVal) ||
4262 getValueTypePair(Record, OpNum, NextValueNo, Cond))
4263 return error("Invalid record");
4264
4265 // select condition can be either i1 or [N x i1]
4266 if (VectorType* vector_type =
4267 dyn_cast<VectorType>(Cond->getType())) {
4268 // expect <n x i1>
4269 if (vector_type->getElementType() != Type::getInt1Ty(Context))
4270 return error("Invalid type for value");
4271 } else {
4272 // expect i1
4273 if (Cond->getType() != Type::getInt1Ty(Context))
4274 return error("Invalid type for value");
4275 }
4276
4277 I = SelectInst::Create(Cond, TrueVal, FalseVal);
4278 InstructionList.push_back(I);
4279 if (OpNum < Record.size() && isa<FPMathOperator>(I)) {
4280 FastMathFlags FMF = getDecodedFastMathFlags(Record[OpNum]);
4281 if (FMF.any())
4282 I->setFastMathFlags(FMF);
4283 }
4284 break;
4285 }
4286
4287 case bitc::FUNC_CODE_INST_EXTRACTELT: { // EXTRACTELT: [opty, opval, opval]
4288 unsigned OpNum = 0;
4289 Value *Vec, *Idx;
4290 if (getValueTypePair(Record, OpNum, NextValueNo, Vec, &FullTy) ||
4291 getValueTypePair(Record, OpNum, NextValueNo, Idx))
4292 return error("Invalid record");
4293 if (!Vec->getType()->isVectorTy())
4294 return error("Invalid type for value");
4295 I = ExtractElementInst::Create(Vec, Idx);
4296 FullTy = cast<VectorType>(FullTy)->getElementType();
4297 InstructionList.push_back(I);
4298 break;
4299 }
4300
4301 case bitc::FUNC_CODE_INST_INSERTELT: { // INSERTELT: [ty, opval,opval,opval]
4302 unsigned OpNum = 0;
4303 Value *Vec, *Elt, *Idx;
4304 if (getValueTypePair(Record, OpNum, NextValueNo, Vec, &FullTy))
4305 return error("Invalid record");
4306 if (!Vec->getType()->isVectorTy())
4307 return error("Invalid type for value");
4308 if (popValue(Record, OpNum, NextValueNo,
4309 cast<VectorType>(Vec->getType())->getElementType(), Elt) ||
4310 getValueTypePair(Record, OpNum, NextValueNo, Idx))
4311 return error("Invalid record");
4312 I = InsertElementInst::Create(Vec, Elt, Idx);
4313 InstructionList.push_back(I);
4314 break;
4315 }
4316
4317 case bitc::FUNC_CODE_INST_SHUFFLEVEC: {// SHUFFLEVEC: [opval,ty,opval,opval]
4318 unsigned OpNum = 0;
4319 Value *Vec1, *Vec2, *Mask;
4320 if (getValueTypePair(Record, OpNum, NextValueNo, Vec1, &FullTy) ||
4321 popValue(Record, OpNum, NextValueNo, Vec1->getType(), Vec2))
4322 return error("Invalid record");
4323
4324 if (getValueTypePair(Record, OpNum, NextValueNo, Mask))
4325 return error("Invalid record");
4326 if (!Vec1->getType()->isVectorTy() || !Vec2->getType()->isVectorTy())
4327 return error("Invalid type for value");
4328
4329 I = new ShuffleVectorInst(Vec1, Vec2, Mask);
4330 FullTy =
4331 VectorType::get(cast<VectorType>(FullTy)->getElementType(),
4332 cast<VectorType>(Mask->getType())->getElementCount());
4333 InstructionList.push_back(I);
4334 break;
4335 }
4336
4337 case bitc::FUNC_CODE_INST_CMP: // CMP: [opty, opval, opval, pred]
4338 // Old form of ICmp/FCmp returning bool
4339 // Existed to differentiate between icmp/fcmp and vicmp/vfcmp which were
4340 // both legal on vectors but had different behaviour.
4341 case bitc::FUNC_CODE_INST_CMP2: { // CMP2: [opty, opval, opval, pred]
4342 // FCmp/ICmp returning bool or vector of bool
4343
4344 unsigned OpNum = 0;
4345 Value *LHS, *RHS;
4346 if (getValueTypePair(Record, OpNum, NextValueNo, LHS) ||
4347 popValue(Record, OpNum, NextValueNo, LHS->getType(), RHS))
4348 return error("Invalid record");
4349
4350 if (OpNum >= Record.size())
4351 return error(
4352 "Invalid record: operand number exceeded available operands");
4353
4354 unsigned PredVal = Record[OpNum];
4355 bool IsFP = LHS->getType()->isFPOrFPVectorTy();
4356 FastMathFlags FMF;
4357 if (IsFP && Record.size() > OpNum+1)
4358 FMF = getDecodedFastMathFlags(Record[++OpNum]);
4359
4360 if (OpNum+1 != Record.size())
4361 return error("Invalid record");
4362
4363 if (LHS->getType()->isFPOrFPVectorTy())
4364 I = new FCmpInst((FCmpInst::Predicate)PredVal, LHS, RHS);
4365 else
4366 I = new ICmpInst((ICmpInst::Predicate)PredVal, LHS, RHS);
4367
4368 if (FMF.any())
4369 I->setFastMathFlags(FMF);
4370 InstructionList.push_back(I);
4371 break;
4372 }
4373
4374 case bitc::FUNC_CODE_INST_RET: // RET: [opty,opval<optional>]
4375 {
4376 unsigned Size = Record.size();
4377 if (Size == 0) {
4378 I = ReturnInst::Create(Context);
4379 InstructionList.push_back(I);
4380 break;
4381 }
4382
4383 unsigned OpNum = 0;
4384 Value *Op = nullptr;
4385 if (getValueTypePair(Record, OpNum, NextValueNo, Op))
4386 return error("Invalid record");
4387 if (OpNum != Record.size())
4388 return error("Invalid record");
4389
4390 I = ReturnInst::Create(Context, Op);
4391 InstructionList.push_back(I);
4392 break;
4393 }
4394 case bitc::FUNC_CODE_INST_BR: { // BR: [bb#, bb#, opval] or [bb#]
4395 if (Record.size() != 1 && Record.size() != 3)
4396 return error("Invalid record");
4397 BasicBlock *TrueDest = getBasicBlock(Record[0]);
4398 if (!TrueDest)
4399 return error("Invalid record");
4400
4401 if (Record.size() == 1) {
4402 I = BranchInst::Create(TrueDest);
4403 InstructionList.push_back(I);
4404 }
4405 else {
4406 BasicBlock *FalseDest = getBasicBlock(Record[1]);
4407 Value *Cond = getValue(Record, 2, NextValueNo,
4408 Type::getInt1Ty(Context));
4409 if (!FalseDest || !Cond)
4410 return error("Invalid record");
4411 I = BranchInst::Create(TrueDest, FalseDest, Cond);
4412 InstructionList.push_back(I);
4413 }
4414 break;
4415 }
4416 case bitc::FUNC_CODE_INST_CLEANUPRET: { // CLEANUPRET: [val] or [val,bb#]
4417 if (Record.size() != 1 && Record.size() != 2)
4418 return error("Invalid record");
4419 unsigned Idx = 0;
4420 Value *CleanupPad =
4421 getValue(Record, Idx++, NextValueNo, Type::getTokenTy(Context));
4422 if (!CleanupPad)
4423 return error("Invalid record");
4424 BasicBlock *UnwindDest = nullptr;
4425 if (Record.size() == 2) {
4426 UnwindDest = getBasicBlock(Record[Idx++]);
4427 if (!UnwindDest)
4428 return error("Invalid record");
4429 }
4430
4431 I = CleanupReturnInst::Create(CleanupPad, UnwindDest);
4432 InstructionList.push_back(I);
4433 break;
4434 }
4435 case bitc::FUNC_CODE_INST_CATCHRET: { // CATCHRET: [val,bb#]
4436 if (Record.size() != 2)
4437 return error("Invalid record");
4438 unsigned Idx = 0;
4439 Value *CatchPad =
4440 getValue(Record, Idx++, NextValueNo, Type::getTokenTy(Context));
4441 if (!CatchPad)
4442 return error("Invalid record");
4443 BasicBlock *BB = getBasicBlock(Record[Idx++]);
4444 if (!BB)
4445 return error("Invalid record");
4446
4447 I = CatchReturnInst::Create(CatchPad, BB);
4448 InstructionList.push_back(I);
4449 break;
4450 }
4451 case bitc::FUNC_CODE_INST_CATCHSWITCH: { // CATCHSWITCH: [tok,num,(bb)*,bb?]
4452 // We must have, at minimum, the outer scope and the number of arguments.
4453 if (Record.size() < 2)
4454 return error("Invalid record");
4455
4456 unsigned Idx = 0;
4457
4458 Value *ParentPad =
4459 getValue(Record, Idx++, NextValueNo, Type::getTokenTy(Context));
4460
4461 unsigned NumHandlers = Record[Idx++];
4462
4463 SmallVector<BasicBlock *, 2> Handlers;
4464 for (unsigned Op = 0; Op != NumHandlers; ++Op) {
4465 BasicBlock *BB = getBasicBlock(Record[Idx++]);
4466 if (!BB)
4467 return error("Invalid record");
4468 Handlers.push_back(BB);
4469 }
4470
4471 BasicBlock *UnwindDest = nullptr;
4472 if (Idx + 1 == Record.size()) {
4473 UnwindDest = getBasicBlock(Record[Idx++]);
4474 if (!UnwindDest)
4475 return error("Invalid record");
4476 }
4477
4478 if (Record.size() != Idx)
4479 return error("Invalid record");
4480
4481 auto *CatchSwitch =
4482 CatchSwitchInst::Create(ParentPad, UnwindDest, NumHandlers);
4483 for (BasicBlock *Handler : Handlers)
4484 CatchSwitch->addHandler(Handler);
4485 I = CatchSwitch;
4486 InstructionList.push_back(I);
4487 break;
4488 }
4489 case bitc::FUNC_CODE_INST_CATCHPAD:
4490 case bitc::FUNC_CODE_INST_CLEANUPPAD: { // [tok,num,(ty,val)*]
4491 // We must have, at minimum, the outer scope and the number of arguments.
4492 if (Record.size() < 2)
4493 return error("Invalid record");
4494
4495 unsigned Idx = 0;
4496
4497 Value *ParentPad =
4498 getValue(Record, Idx++, NextValueNo, Type::getTokenTy(Context));
4499
4500 unsigned NumArgOperands = Record[Idx++];
4501
4502 SmallVector<Value *, 2> Args;
4503 for (unsigned Op = 0; Op != NumArgOperands; ++Op) {
4504 Value *Val;
4505 if (getValueTypePair(Record, Idx, NextValueNo, Val))
4506 return error("Invalid record");
4507 Args.push_back(Val);
4508 }
4509
4510 if (Record.size() != Idx)
4511 return error("Invalid record");
4512
4513 if (BitCode == bitc::FUNC_CODE_INST_CLEANUPPAD)
4514 I = CleanupPadInst::Create(ParentPad, Args);
4515 else
4516 I = CatchPadInst::Create(ParentPad, Args);
4517 InstructionList.push_back(I);
4518 break;
4519 }
4520 case bitc::FUNC_CODE_INST_SWITCH: { // SWITCH: [opty, op0, op1, ...]
4521 // Check magic
4522 if ((Record[0] >> 16) == SWITCH_INST_MAGIC) {
4523 // "New" SwitchInst format with case ranges. The changes to write this
4524 // format were reverted but we still recognize bitcode that uses it.
4525 // Hopefully someday we will have support for case ranges and can use
4526 // this format again.
4527
4528 Type *OpTy = getTypeByID(Record[1]);
4529 unsigned ValueBitWidth = cast<IntegerType>(OpTy)->getBitWidth();
4530
4531 Value *Cond = getValue(Record, 2, NextValueNo, OpTy);
4532 BasicBlock *Default = getBasicBlock(Record[3]);
4533 if (!OpTy || !Cond || !Default)
4534 return error("Invalid record");
4535
4536 unsigned NumCases = Record[4];
4537
4538 SwitchInst *SI = SwitchInst::Create(Cond, Default, NumCases);
4539 InstructionList.push_back(SI);
4540
4541 unsigned CurIdx = 5;
4542 for (unsigned i = 0; i != NumCases; ++i) {
4543 SmallVector<ConstantInt*, 1> CaseVals;
4544 unsigned NumItems = Record[CurIdx++];
4545 for (unsigned ci = 0; ci != NumItems; ++ci) {
4546 bool isSingleNumber = Record[CurIdx++];
4547
4548 APInt Low;
4549 unsigned ActiveWords = 1;
4550 if (ValueBitWidth > 64)
4551 ActiveWords = Record[CurIdx++];
4552 Low = readWideAPInt(makeArrayRef(&Record[CurIdx], ActiveWords),
4553 ValueBitWidth);
4554 CurIdx += ActiveWords;
4555
4556 if (!isSingleNumber) {
4557 ActiveWords = 1;
4558 if (ValueBitWidth > 64)
4559 ActiveWords = Record[CurIdx++];
4560 APInt High = readWideAPInt(
4561 makeArrayRef(&Record[CurIdx], ActiveWords), ValueBitWidth);
4562 CurIdx += ActiveWords;
4563
4564 // FIXME: It is not clear whether values in the range should be
4565 // compared as signed or unsigned values. The partially
4566 // implemented changes that used this format in the past used
4567 // unsigned comparisons.
4568 for ( ; Low.ule(High); ++Low)
4569 CaseVals.push_back(ConstantInt::get(Context, Low));
4570 } else
4571 CaseVals.push_back(ConstantInt::get(Context, Low));
4572 }
4573 BasicBlock *DestBB = getBasicBlock(Record[CurIdx++]);
4574 for (SmallVector<ConstantInt*, 1>::iterator cvi = CaseVals.begin(),
4575 cve = CaseVals.end(); cvi != cve; ++cvi)
4576 SI->addCase(*cvi, DestBB);
4577 }
4578 I = SI;
4579 break;
4580 }
4581
4582 // Old SwitchInst format without case ranges.
4583
4584 if (Record.size() < 3 || (Record.size() & 1) == 0)
4585 return error("Invalid record");
4586 Type *OpTy = getTypeByID(Record[0]);
4587 Value *Cond = getValue(Record, 1, NextValueNo, OpTy);
4588 BasicBlock *Default = getBasicBlock(Record[2]);
4589 if (!OpTy || !Cond || !Default)
4590 return error("Invalid record");
4591 unsigned NumCases = (Record.size()-3)/2;
4592 SwitchInst *SI = SwitchInst::Create(Cond, Default, NumCases);
4593 InstructionList.push_back(SI);
4594 for (unsigned i = 0, e = NumCases; i != e; ++i) {
4595 ConstantInt *CaseVal =
4596 dyn_cast_or_null<ConstantInt>(getFnValueByID(Record[3+i*2], OpTy));
4597 BasicBlock *DestBB = getBasicBlock(Record[1+3+i*2]);
4598 if (!CaseVal || !DestBB) {
4599 delete SI;
4600 return error("Invalid record");
4601 }
4602 SI->addCase(CaseVal, DestBB);
4603 }
4604 I = SI;
4605 break;
4606 }
4607 case bitc::FUNC_CODE_INST_INDIRECTBR: { // INDIRECTBR: [opty, op0, op1, ...]
4608 if (Record.size() < 2)
4609 return error("Invalid record");
4610 Type *OpTy = getTypeByID(Record[0]);
4611 Value *Address = getValue(Record, 1, NextValueNo, OpTy);
4612 if (!OpTy || !Address)
4613 return error("Invalid record");
4614 unsigned NumDests = Record.size()-2;
4615 IndirectBrInst *IBI = IndirectBrInst::Create(Address, NumDests);
4616 InstructionList.push_back(IBI);
4617 for (unsigned i = 0, e = NumDests; i != e; ++i) {
4618 if (BasicBlock *DestBB = getBasicBlock(Record[2+i])) {
4619 IBI->addDestination(DestBB);
4620 } else {
4621 delete IBI;
4622 return error("Invalid record");
4623 }
4624 }
4625 I = IBI;
4626 break;
4627 }
4628
4629 case bitc::FUNC_CODE_INST_INVOKE: {
4630 // INVOKE: [attrs, cc, normBB, unwindBB, fnty, op0,op1,op2, ...]
4631 if (Record.size() < 4)
4632 return error("Invalid record");
4633 unsigned OpNum = 0;
4634 AttributeList PAL = getAttributes(Record[OpNum++]);
4635 unsigned CCInfo = Record[OpNum++];
4636 BasicBlock *NormalBB = getBasicBlock(Record[OpNum++]);
4637 BasicBlock *UnwindBB = getBasicBlock(Record[OpNum++]);
4638
4639 FunctionType *FTy = nullptr;
4640 FunctionType *FullFTy = nullptr;
4641 if ((CCInfo >> 13) & 1) {
4642 FullFTy =
4643 dyn_cast<FunctionType>(getFullyStructuredTypeByID(Record[OpNum++]));
4644 if (!FullFTy)
4645 return error("Explicit invoke type is not a function type");
4646 FTy = cast<FunctionType>(flattenPointerTypes(FullFTy));
4647 }
4648
4649 Value *Callee;
4650 if (getValueTypePair(Record, OpNum, NextValueNo, Callee, &FullTy))
4651 return error("Invalid record");
4652
4653 PointerType *CalleeTy = dyn_cast<PointerType>(Callee->getType());
4654 if (!CalleeTy)
4655 return error("Callee is not a pointer");
4656 if (!FTy) {
4657 FullFTy =
4658 dyn_cast<FunctionType>(cast<PointerType>(FullTy)->getElementType());
4659 if (!FullFTy)
4660 return error("Callee is not of pointer to function type");
4661 FTy = cast<FunctionType>(flattenPointerTypes(FullFTy));
4662 } else if (getPointerElementFlatType(FullTy) != FTy)
4663 return error("Explicit invoke type does not match pointee type of "
4664 "callee operand");
4665 if (Record.size() < FTy->getNumParams() + OpNum)
4666 return error("Insufficient operands to call");
4667
4668 SmallVector<Value*, 16> Ops;
4669 SmallVector<Type *, 16> ArgsFullTys;
4670 for (unsigned i = 0, e = FTy->getNumParams(); i != e; ++i, ++OpNum) {
4671 Ops.push_back(getValue(Record, OpNum, NextValueNo,
4672 FTy->getParamType(i)));
4673 ArgsFullTys.push_back(FullFTy->getParamType(i));
4674 if (!Ops.back())
4675 return error("Invalid record");
4676 }
4677
4678 if (!FTy->isVarArg()) {
4679 if (Record.size() != OpNum)
4680 return error("Invalid record");
4681 } else {
4682 // Read type/value pairs for varargs params.
4683 while (OpNum != Record.size()) {
4684 Value *Op;
4685 Type *FullTy;
4686 if (getValueTypePair(Record, OpNum, NextValueNo, Op, &FullTy))
4687 return error("Invalid record");
4688 Ops.push_back(Op);
4689 ArgsFullTys.push_back(FullTy);
4690 }
4691 }
4692
4693 I = InvokeInst::Create(FTy, Callee, NormalBB, UnwindBB, Ops,
4694 OperandBundles);
4695 FullTy = FullFTy->getReturnType();
4696 OperandBundles.clear();
4697 InstructionList.push_back(I);
4698 cast<InvokeInst>(I)->setCallingConv(
4699 static_cast<CallingConv::ID>(CallingConv::MaxID & CCInfo));
4700 cast<InvokeInst>(I)->setAttributes(PAL);
4701 propagateByValSRetTypes(cast<CallBase>(I), ArgsFullTys);
4702
4703 break;
4704 }
4705 case bitc::FUNC_CODE_INST_RESUME: { // RESUME: [opval]
4706 unsigned Idx = 0;
4707 Value *Val = nullptr;
4708 if (getValueTypePair(Record, Idx, NextValueNo, Val))
4709 return error("Invalid record");
4710 I = ResumeInst::Create(Val);
4711 InstructionList.push_back(I);
4712 break;
4713 }
4714 case bitc::FUNC_CODE_INST_CALLBR: {
4715 // CALLBR: [attr, cc, norm, transfs, fty, fnid, args]
4716 unsigned OpNum = 0;
4717 AttributeList PAL = getAttributes(Record[OpNum++]);
4718 unsigned CCInfo = Record[OpNum++];
4719
4720 BasicBlock *DefaultDest = getBasicBlock(Record[OpNum++]);
4721 unsigned NumIndirectDests = Record[OpNum++];
4722 SmallVector<BasicBlock *, 16> IndirectDests;
4723 for (unsigned i = 0, e = NumIndirectDests; i != e; ++i)
4724 IndirectDests.push_back(getBasicBlock(Record[OpNum++]));
4725
4726 FunctionType *FTy = nullptr;
4727 FunctionType *FullFTy = nullptr;
4728 if ((CCInfo >> bitc::CALL_EXPLICIT_TYPE) & 1) {
4729 FullFTy =
4730 dyn_cast<FunctionType>(getFullyStructuredTypeByID(Record[OpNum++]));
4731 if (!FullFTy)
4732 return error("Explicit call type is not a function type");
4733 FTy = cast<FunctionType>(flattenPointerTypes(FullFTy));
4734 }
4735
4736 Value *Callee;
4737 if (getValueTypePair(Record, OpNum, NextValueNo, Callee, &FullTy))
4738 return error("Invalid record");
4739
4740 PointerType *OpTy = dyn_cast<PointerType>(Callee->getType());
4741 if (!OpTy)
4742 return error("Callee is not a pointer type");
4743 if (!FTy) {
4744 FullFTy =
4745 dyn_cast<FunctionType>(cast<PointerType>(FullTy)->getElementType());
4746 if (!FullFTy)
4747 return error("Callee is not of pointer to function type");
4748 FTy = cast<FunctionType>(flattenPointerTypes(FullFTy));
4749 } else if (getPointerElementFlatType(FullTy) != FTy)
4750 return error("Explicit call type does not match pointee type of "
4751 "callee operand");
4752 if (Record.size() < FTy->getNumParams() + OpNum)
4753 return error("Insufficient operands to call");
4754
4755 SmallVector<Value*, 16> Args;
4756 // Read the fixed params.
4757 for (unsigned i = 0, e = FTy->getNumParams(); i != e; ++i, ++OpNum) {
4758 if (FTy->getParamType(i)->isLabelTy())
4759 Args.push_back(getBasicBlock(Record[OpNum]));
4760 else
4761 Args.push_back(getValue(Record, OpNum, NextValueNo,
4762 FTy->getParamType(i)));
4763 if (!Args.back())
4764 return error("Invalid record");
4765 }
4766
4767 // Read type/value pairs for varargs params.
4768 if (!FTy->isVarArg()) {
4769 if (OpNum != Record.size())
4770 return error("Invalid record");
4771 } else {
4772 while (OpNum != Record.size()) {
4773 Value *Op;
4774 if (getValueTypePair(Record, OpNum, NextValueNo, Op))
4775 return error("Invalid record");
4776 Args.push_back(Op);
4777 }
4778 }
4779
4780 I = CallBrInst::Create(FTy, Callee, DefaultDest, IndirectDests, Args,
4781 OperandBundles);
4782 FullTy = FullFTy->getReturnType();
4783 OperandBundles.clear();
4784 InstructionList.push_back(I);
4785 cast<CallBrInst>(I)->setCallingConv(
4786 static_cast<CallingConv::ID>((0x7ff & CCInfo) >> bitc::CALL_CCONV));
4787 cast<CallBrInst>(I)->setAttributes(PAL);
4788 break;
4789 }
4790 case bitc::FUNC_CODE_INST_UNREACHABLE: // UNREACHABLE
4791 I = new UnreachableInst(Context);
4792 InstructionList.push_back(I);
4793 break;
4794 case bitc::FUNC_CODE_INST_PHI: { // PHI: [ty, val0,bb0, ...]
4795 if (Record.empty())
4796 return error("Invalid record");
4797 // The first record specifies the type.
4798 FullTy = getFullyStructuredTypeByID(Record[0]);
4799 Type *Ty = flattenPointerTypes(FullTy);
4800 if (!Ty)
4801 return error("Invalid record");
4802
4803 // Phi arguments are pairs of records of [value, basic block].
4804 // There is an optional final record for fast-math-flags if this phi has a
4805 // floating-point type.
4806 size_t NumArgs = (Record.size() - 1) / 2;
4807 PHINode *PN = PHINode::Create(Ty, NumArgs);
4808 if ((Record.size() - 1) % 2 == 1 && !isa<FPMathOperator>(PN))
4809 return error("Invalid record");
4810 InstructionList.push_back(PN);
4811
4812 for (unsigned i = 0; i != NumArgs; i++) {
4813 Value *V;
4814 // With the new function encoding, it is possible that operands have
4815 // negative IDs (for forward references). Use a signed VBR
4816 // representation to keep the encoding small.
4817 if (UseRelativeIDs)
4818 V = getValueSigned(Record, i * 2 + 1, NextValueNo, Ty);
4819 else
4820 V = getValue(Record, i * 2 + 1, NextValueNo, Ty);
4821 BasicBlock *BB = getBasicBlock(Record[i * 2 + 2]);
4822 if (!V || !BB)
4823 return error("Invalid record");
4824 PN->addIncoming(V, BB);
4825 }
4826 I = PN;
4827
4828 // If there are an even number of records, the final record must be FMF.
4829 if (Record.size() % 2 == 0) {
4830 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-13~++20210413100635+64c24f493e5f/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 4830, __PRETTY_FUNCTION__))
;
4831 FastMathFlags FMF = getDecodedFastMathFlags(Record[Record.size() - 1]);
4832 if (FMF.any())
4833 I->setFastMathFlags(FMF);
4834 }
4835
4836 break;
4837 }
4838
4839 case bitc::FUNC_CODE_INST_LANDINGPAD:
4840 case bitc::FUNC_CODE_INST_LANDINGPAD_OLD: {
4841 // LANDINGPAD: [ty, val, val, num, (id0,val0 ...)?]
4842 unsigned Idx = 0;
4843 if (BitCode == bitc::FUNC_CODE_INST_LANDINGPAD) {
4844 if (Record.size() < 3)
4845 return error("Invalid record");
4846 } else {
4847 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-13~++20210413100635+64c24f493e5f/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 4847, __PRETTY_FUNCTION__))
;
4848 if (Record.size() < 4)
4849 return error("Invalid record");
4850 }
4851 FullTy = getFullyStructuredTypeByID(Record[Idx++]);
4852 Type *Ty = flattenPointerTypes(FullTy);
4853 if (!Ty)
4854 return error("Invalid record");
4855 if (BitCode == bitc::FUNC_CODE_INST_LANDINGPAD_OLD) {
4856 Value *PersFn = nullptr;
4857 if (getValueTypePair(Record, Idx, NextValueNo, PersFn))
4858 return error("Invalid record");
4859
4860 if (!F->hasPersonalityFn())
4861 F->setPersonalityFn(cast<Constant>(PersFn));
4862 else if (F->getPersonalityFn() != cast<Constant>(PersFn))
4863 return error("Personality function mismatch");
4864 }
4865
4866 bool IsCleanup = !!Record[Idx++];
4867 unsigned NumClauses = Record[Idx++];
4868 LandingPadInst *LP = LandingPadInst::Create(Ty, NumClauses);
4869 LP->setCleanup(IsCleanup);
4870 for (unsigned J = 0; J != NumClauses; ++J) {
4871 LandingPadInst::ClauseType CT =
4872 LandingPadInst::ClauseType(Record[Idx++]); (void)CT;
4873 Value *Val;
4874
4875 if (getValueTypePair(Record, Idx, NextValueNo, Val)) {
4876 delete LP;
4877 return error("Invalid record");
4878 }
4879
4880 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-13~++20210413100635+64c24f493e5f/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 4882, __PRETTY_FUNCTION__))
4881 !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-13~++20210413100635+64c24f493e5f/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 4882, __PRETTY_FUNCTION__))
4882 "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-13~++20210413100635+64c24f493e5f/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 4882, __PRETTY_FUNCTION__))
;
4883 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-13~++20210413100635+64c24f493e5f/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 4885, __PRETTY_FUNCTION__))
4884 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-13~++20210413100635+64c24f493e5f/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 4885, __PRETTY_FUNCTION__))
4885 "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-13~++20210413100635+64c24f493e5f/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 4885, __PRETTY_FUNCTION__))
;
4886 LP->addClause(cast<Constant>(Val));
4887 }
4888
4889 I = LP;
4890 InstructionList.push_back(I);
4891 break;
4892 }
4893
4894 case bitc::FUNC_CODE_INST_ALLOCA: { // ALLOCA: [instty, opty, op, align]
4895 if (Record.size() != 4)
4896 return error("Invalid record");
4897 using APV = AllocaPackedValues;
4898 const uint64_t Rec = Record[3];
4899 const bool InAlloca = Bitfield::get<APV::UsedWithInAlloca>(Rec);
4900 const bool SwiftError = Bitfield::get<APV::SwiftError>(Rec);
4901 FullTy = getFullyStructuredTypeByID(Record[0]);
4902 Type *Ty = flattenPointerTypes(FullTy);
4903 if (!Bitfield::get<APV::ExplicitType>(Rec)) {
4904 auto *PTy = dyn_cast_or_null<PointerType>(Ty);
4905 if (!PTy)
4906 return error("Old-style alloca with a non-pointer type");
4907 std::tie(FullTy, Ty) = getPointerElementTypes(FullTy);
4908 }
4909 Type *OpTy = getTypeByID(Record[1]);
4910 Value *Size = getFnValueByID(Record[2], OpTy);
4911 MaybeAlign Align;
4912 if (Error Err =
4913 parseAlignmentValue(Bitfield::get<APV::Align>(Rec), Align)) {
4914 return Err;
4915 }
4916 if (!Ty || !Size)
4917 return error("Invalid record");
4918
4919 // FIXME: Make this an optional field.
4920 const DataLayout &DL = TheModule->getDataLayout();
4921 unsigned AS = DL.getAllocaAddrSpace();
4922
4923 SmallPtrSet<Type *, 4> Visited;
4924 if (!Align && !Ty->isSized(&Visited))
4925 return error("alloca of unsized type");
4926 if (!Align)
4927 Align = DL.getPrefTypeAlign(Ty);
4928
4929 AllocaInst *AI = new AllocaInst(Ty, AS, Size, *Align);
4930 AI->setUsedWithInAlloca(InAlloca);
4931 AI->setSwiftError(SwiftError);
4932 I = AI;
4933 FullTy = PointerType::get(FullTy, AS);
4934 InstructionList.push_back(I);
4935 break;
4936 }
4937 case bitc::FUNC_CODE_INST_LOAD: { // LOAD: [opty, op, align, vol]
4938 unsigned OpNum = 0;
4939 Value *Op;
4940 if (getValueTypePair(Record, OpNum, NextValueNo, Op, &FullTy) ||
4941 (OpNum + 2 != Record.size() && OpNum + 3 != Record.size()))
4942 return error("Invalid record");
4943
4944 if (!isa<PointerType>(Op->getType()))
4945 return error("Load operand is not a pointer type");
4946
4947 Type *Ty = nullptr;
4948 if (OpNum + 3 == Record.size()) {
4949 FullTy = getFullyStructuredTypeByID(Record[OpNum++]);
4950 Ty = flattenPointerTypes(FullTy);
4951 } else
4952 std::tie(FullTy, Ty) = getPointerElementTypes(FullTy);
4953
4954 if (Error Err = typeCheckLoadStoreInst(Ty, Op->getType()))
4955 return Err;
4956
4957 MaybeAlign Align;
4958 if (Error Err = parseAlignmentValue(Record[OpNum], Align))
4959 return Err;
4960 SmallPtrSet<Type *, 4> Visited;
4961 if (!Align && !Ty->isSized(&Visited))
4962 return error("load of unsized type");
4963 if (!Align)
4964 Align = TheModule->getDataLayout().getABITypeAlign(Ty);
4965 I = new LoadInst(Ty, Op, "", Record[OpNum + 1], *Align);
4966 InstructionList.push_back(I);
4967 break;
4968 }
4969 case bitc::FUNC_CODE_INST_LOADATOMIC: {
4970 // LOADATOMIC: [opty, op, align, vol, ordering, ssid]
4971 unsigned OpNum = 0;
4972 Value *Op;
4973 if (getValueTypePair(Record, OpNum, NextValueNo, Op, &FullTy) ||
4974 (OpNum + 4 != Record.size() && OpNum + 5 != Record.size()))
4975 return error("Invalid record");
4976
4977 if (!isa<PointerType>(Op->getType()))
4978 return error("Load operand is not a pointer type");
4979
4980 Type *Ty = nullptr;
4981 if (OpNum + 5 == Record.size()) {
4982 FullTy = getFullyStructuredTypeByID(Record[OpNum++]);
4983 Ty = flattenPointerTypes(FullTy);
4984 } else
4985 std::tie(FullTy, Ty) = getPointerElementTypes(FullTy);
4986
4987 if (Error Err = typeCheckLoadStoreInst(Ty, Op->getType()))
4988 return Err;
4989
4990 AtomicOrdering Ordering = getDecodedOrdering(Record[OpNum + 2]);
4991 if (Ordering == AtomicOrdering::NotAtomic ||
4992 Ordering == AtomicOrdering::Release ||
4993 Ordering == AtomicOrdering::AcquireRelease)
4994 return error("Invalid record");
4995 if (Ordering != AtomicOrdering::NotAtomic && Record[OpNum] == 0)
4996 return error("Invalid record");
4997 SyncScope::ID SSID = getDecodedSyncScopeID(Record[OpNum + 3]);
4998
4999 MaybeAlign Align;
5000 if (Error Err = parseAlignmentValue(Record[OpNum], Align))
5001 return Err;
5002 if (!Align)
5003 return error("Alignment missing from atomic load");
5004 I = new LoadInst(Ty, Op, "", Record[OpNum + 1], *Align, Ordering, SSID);
5005 InstructionList.push_back(I);
5006 break;
5007 }
5008 case bitc::FUNC_CODE_INST_STORE:
5009 case bitc::FUNC_CODE_INST_STORE_OLD: { // STORE2:[ptrty, ptr, val, align, vol]
5010 unsigned OpNum = 0;
5011 Value *Val, *Ptr;
5012 Type *FullTy;
5013 if (getValueTypePair(Record, OpNum, NextValueNo, Ptr, &FullTy) ||
5014 (BitCode == bitc::FUNC_CODE_INST_STORE
5015 ? getValueTypePair(Record, OpNum, NextValueNo, Val)
5016 : popValue(Record, OpNum, NextValueNo,
5017 getPointerElementFlatType(FullTy), Val)) ||
5018 OpNum + 2 != Record.size())
5019 return error("Invalid record");
5020
5021 if (Error Err = typeCheckLoadStoreInst(Val->getType(), Ptr->getType()))
5022 return Err;
5023 MaybeAlign Align;
5024 if (Error Err = parseAlignmentValue(Record[OpNum], Align))
5025 return Err;
5026 SmallPtrSet<Type *, 4> Visited;
5027 if (!Align && !Val->getType()->isSized(&Visited))
5028 return error("store of unsized type");
5029 if (!Align)
5030 Align = TheModule->getDataLayout().getABITypeAlign(Val->getType());
5031 I = new StoreInst(Val, Ptr, Record[OpNum + 1], *Align);
5032 InstructionList.push_back(I);
5033 break;
5034 }
5035 case bitc::FUNC_CODE_INST_STOREATOMIC:
5036 case bitc::FUNC_CODE_INST_STOREATOMIC_OLD: {
5037 // STOREATOMIC: [ptrty, ptr, val, align, vol, ordering, ssid]
5038 unsigned OpNum = 0;
5039 Value *Val, *Ptr;
5040 Type *FullTy;
5041 if (getValueTypePair(Record, OpNum, NextValueNo, Ptr, &FullTy) ||
5042 !isa<PointerType>(Ptr->getType()) ||
5043 (BitCode == bitc::FUNC_CODE_INST_STOREATOMIC
5044 ? getValueTypePair(Record, OpNum, NextValueNo, Val)
5045 : popValue(Record, OpNum, NextValueNo,
5046 getPointerElementFlatType(FullTy), Val)) ||
5047 OpNum + 4 != Record.size())
5048 return error("Invalid record");
5049
5050 if (Error Err = typeCheckLoadStoreInst(Val->getType(), Ptr->getType()))
5051 return Err;
5052 AtomicOrdering Ordering = getDecodedOrdering(Record[OpNum + 2]);
5053 if (Ordering == AtomicOrdering::NotAtomic ||
5054 Ordering == AtomicOrdering::Acquire ||
5055 Ordering == AtomicOrdering::AcquireRelease)
5056 return error("Invalid record");
5057 SyncScope::ID SSID = getDecodedSyncScopeID(Record[OpNum + 3]);
5058 if (Ordering != AtomicOrdering::NotAtomic && Record[OpNum] == 0)
5059 return error("Invalid record");
5060
5061 MaybeAlign Align;
5062 if (Error Err = parseAlignmentValue(Record[OpNum], Align))
5063 return Err;
5064 if (!Align)
5065 return error("Alignment missing from atomic store");
5066 I = new StoreInst(Val, Ptr, Record[OpNum + 1], *Align, Ordering, SSID);
5067 InstructionList.push_back(I);
5068 break;
5069 }
5070 case bitc::FUNC_CODE_INST_CMPXCHG_OLD: {
5071 // CMPXCHG_OLD: [ptrty, ptr, cmp, val, vol, ordering, synchscope,
5072 // failure_ordering?, weak?]
5073 const size_t NumRecords = Record.size();
5074 unsigned OpNum = 0;
5075 Value *Ptr = nullptr;
5076 if (getValueTypePair(Record, OpNum, NextValueNo, Ptr, &FullTy))
5077 return error("Invalid record");
5078
5079 if (!isa<PointerType>(Ptr->getType()))
5080 return error("Cmpxchg operand is not a pointer type");
5081
5082 Value *Cmp = nullptr;
5083 if (popValue(Record, OpNum, NextValueNo,
5084 getPointerElementFlatType(FullTy), Cmp))
5085 return error("Invalid record");
5086
5087 FullTy = cast<PointerType>(FullTy)->getElementType();
5088
5089 Value *New = nullptr;
5090 if (popValue(Record, OpNum, NextValueNo, Cmp->getType(), New) ||
5091 NumRecords < OpNum + 3 || NumRecords > OpNum + 5)
5092 return error("Invalid record");
5093
5094 const AtomicOrdering SuccessOrdering =
5095 getDecodedOrdering(Record[OpNum + 1]);
5096 if (SuccessOrdering == AtomicOrdering::NotAtomic ||
5097 SuccessOrdering == AtomicOrdering::Unordered)
5098 return error("Invalid record");
5099
5100 const SyncScope::ID SSID = getDecodedSyncScopeID(Record[OpNum + 2]);
5101
5102 if (Error Err = typeCheckLoadStoreInst(Cmp->getType(), Ptr->getType()))
5103 return Err;
5104
5105 const AtomicOrdering FailureOrdering =
5106 NumRecords < 7
5107 ? AtomicCmpXchgInst::getStrongestFailureOrdering(SuccessOrdering)
5108 : getDecodedOrdering(Record[OpNum + 3]);
5109
5110 const Align Alignment(
5111 TheModule->getDataLayout().getTypeStoreSize(Cmp->getType()));
5112
5113 I = new AtomicCmpXchgInst(Ptr, Cmp, New, Alignment, SuccessOrdering,
5114 FailureOrdering, SSID);
5115 cast<AtomicCmpXchgInst>(I)->setVolatile(Record[OpNum]);
5116 FullTy = StructType::get(Context, {FullTy, Type::getInt1Ty(Context)});
5117
5118 if (NumRecords < 8) {
5119 // Before weak cmpxchgs existed, the instruction simply returned the
5120 // value loaded from memory, so bitcode files from that era will be
5121 // expecting the first component of a modern cmpxchg.
5122 CurBB->getInstList().push_back(I);
5123 I = ExtractValueInst::Create(I, 0);
5124 FullTy = cast<StructType>(FullTy)->getElementType(0);
5125 } else {
5126 cast<AtomicCmpXchgInst>(I)->setWeak(Record[OpNum + 4]);
5127 }
5128
5129 InstructionList.push_back(I);
5130 break;
5131 }
5132 case bitc::FUNC_CODE_INST_CMPXCHG: {
5133 // CMPXCHG: [ptrty, ptr, cmp, val, vol, success_ordering, synchscope,
5134 // failure_ordering, weak, align?]
5135 const size_t NumRecords = Record.size();
5136 unsigned OpNum = 0;
5137 Value *Ptr = nullptr;
5138 if (getValueTypePair(Record, OpNum, NextValueNo, Ptr, &FullTy))
5139 return error("Invalid record");
5140
5141 if (!isa<PointerType>(Ptr->getType()))
5142 return error("Cmpxchg operand is not a pointer type");
5143
5144 Value *Cmp = nullptr;
5145 if (getValueTypePair(Record, OpNum, NextValueNo, Cmp, &FullTy))
5146 return error("Invalid record");
5147
5148 Value *Val = nullptr;
5149 if (popValue(Record, OpNum, NextValueNo, Cmp->getType(), Val))
5150 return error("Invalid record");
5151
5152 if (NumRecords < OpNum + 3 || NumRecords > OpNum + 6)
5153 return error("Invalid record");
5154
5155 const bool IsVol = Record[OpNum];
5156
5157 const AtomicOrdering SuccessOrdering =
5158 getDecodedOrdering(Record[OpNum + 1]);
5159 if (SuccessOrdering == AtomicOrdering::NotAtomic ||
5160 SuccessOrdering == AtomicOrdering::Unordered)
5161 return error("Invalid record");
5162
5163 const SyncScope::ID SSID = getDecodedSyncScopeID(Record[OpNum + 2]);
5164
5165 if (Error Err = typeCheckLoadStoreInst(Cmp->getType(), Ptr->getType()))
5166 return Err;
5167
5168 const AtomicOrdering FailureOrdering =
5169 getDecodedOrdering(Record[OpNum + 3]);
5170
5171 const bool IsWeak = Record[OpNum + 4];
5172
5173 MaybeAlign Alignment;
5174
5175 if (NumRecords == (OpNum + 6)) {
5176 if (Error Err = parseAlignmentValue(Record[OpNum + 5], Alignment))
5177 return Err;
5178 }
5179 if (!Alignment)
5180 Alignment =
5181 Align(TheModule->getDataLayout().getTypeStoreSize(Cmp->getType()));
5182
5183 I = new AtomicCmpXchgInst(Ptr, Cmp, Val, *Alignment, SuccessOrdering,
5184 FailureOrdering, SSID);
5185 FullTy = StructType::get(Context, {FullTy, Type::getInt1Ty(Context)});
5186 cast<AtomicCmpXchgInst>(I)->setVolatile(IsVol);
5187 cast<AtomicCmpXchgInst>(I)->setWeak(IsWeak);
5188
5189 InstructionList.push_back(I);
5190 break;
5191 }
5192 case bitc::FUNC_CODE_INST_ATOMICRMW: {
5193 // ATOMICRMW:[ptrty, ptr, val, op, vol, ordering, ssid, align?]
5194 const size_t NumRecords = Record.size();
5195 unsigned OpNum = 0;
5196
5197 Value *Ptr = nullptr;
5198 if (getValueTypePair(Record, OpNum, NextValueNo, Ptr, &FullTy))
5199 return error("Invalid record");
5200
5201 if (!isa<PointerType>(Ptr->getType()))
5202 return error("Invalid record");
5203
5204 Value *Val = nullptr;
5205 if (popValue(Record, OpNum, NextValueNo,
5206 getPointerElementFlatType(FullTy), Val))
5207 return error("Invalid record");
5208
5209 if (!(NumRecords == (OpNum + 4) || NumRecords == (OpNum + 5)))
5210 return error("Invalid record");
5211
5212 const AtomicRMWInst::BinOp Operation =
5213 getDecodedRMWOperation(Record[OpNum]);
5214 if (Operation < AtomicRMWInst::FIRST_BINOP ||
5215 Operation > AtomicRMWInst::LAST_BINOP)
5216 return error("Invalid record");
5217
5218 const bool IsVol = Record[OpNum + 1];
5219
5220 const AtomicOrdering Ordering = getDecodedOrdering(Record[OpNum + 2]);
5221 if (Ordering == AtomicOrdering::NotAtomic ||
5222 Ordering == AtomicOrdering::Unordered)
5223 return error("Invalid record");
5224
5225 const SyncScope::ID SSID = getDecodedSyncScopeID(Record[OpNum + 3]);
5226
5227 MaybeAlign Alignment;
5228
5229 if (NumRecords == (OpNum + 5)) {
5230 if (Error Err = parseAlignmentValue(Record[OpNum + 4], Alignment))
5231 return Err;
5232 }
5233
5234 if (!Alignment)
5235 Alignment =
5236 Align(TheModule->getDataLayout().getTypeStoreSize(Val->getType()));
5237
5238 I = new AtomicRMWInst(Operation, Ptr, Val, *Alignment, Ordering, SSID);
5239 FullTy = getPointerElementFlatType(FullTy);
5240 cast<AtomicRMWInst>(I)->setVolatile(IsVol);
5241
5242 InstructionList.push_back(I);
5243 break;
5244 }
5245 case bitc::FUNC_CODE_INST_FENCE: { // FENCE:[ordering, ssid]
5246 if (2 != Record.size())
5247 return error("Invalid record");
5248 AtomicOrdering Ordering = getDecodedOrdering(Record[0]);
5249 if (Ordering == AtomicOrdering::NotAtomic ||
5250 Ordering == AtomicOrdering::Unordered ||
5251 Ordering == AtomicOrdering::Monotonic)
5252 return error("Invalid record");
5253 SyncScope::ID SSID = getDecodedSyncScopeID(Record[1]);
5254 I = new FenceInst(Context, Ordering, SSID);
5255 InstructionList.push_back(I);
5256 break;
5257 }
5258 case bitc::FUNC_CODE_INST_CALL: {
5259 // CALL: [paramattrs, cc, fmf, fnty, fnid, arg0, arg1...]
5260 if (Record.size() < 3)
5261 return error("Invalid record");
5262
5263 unsigned OpNum = 0;
5264 AttributeList PAL = getAttributes(Record[OpNum++]);
5265 unsigned CCInfo = Record[OpNum++];
5266
5267 FastMathFlags FMF;
5268 if ((CCInfo >> bitc::CALL_FMF) & 1) {
5269 FMF = getDecodedFastMathFlags(Record[OpNum++]);
5270 if (!FMF.any())
5271 return error("Fast math flags indicator set for call with no FMF");
5272 }
5273
5274 FunctionType *FTy = nullptr;
5275 FunctionType *FullFTy = nullptr;
5276 if ((CCInfo >> bitc::CALL_EXPLICIT_TYPE) & 1) {
5277 FullFTy =
5278 dyn_cast<FunctionType>(getFullyStructuredTypeByID(Record[OpNum++]));
5279 if (!FullFTy)
5280 return error("Explicit call type is not a function type");
5281 FTy = cast<FunctionType>(flattenPointerTypes(FullFTy));
5282 }
5283
5284 Value *Callee;
5285 if (getValueTypePair(Record, OpNum, NextValueNo, Callee, &FullTy))
5286 return error("Invalid record");
5287
5288 PointerType *OpTy = dyn_cast<PointerType>(Callee->getType());
5289 if (!OpTy)
5290 return error("Callee is not a pointer type");
5291 if (!FTy) {
5292 FullFTy =
5293 dyn_cast<FunctionType>(cast<PointerType>(FullTy)->getElementType());
5294 if (!FullFTy)
5295 return error("Callee is not of pointer to function type");
5296 FTy = cast<FunctionType>(flattenPointerTypes(FullFTy));
5297 } else if (getPointerElementFlatType(FullTy) != FTy)
5298 return error("Explicit call type does not match pointee type of "
5299 "callee operand");
5300 if (Record.size() < FTy->getNumParams() + OpNum)
5301 return error("Insufficient operands to call");
5302
5303 SmallVector<Value*, 16> Args;
5304 SmallVector<Type*, 16> ArgsFullTys;
5305 // Read the fixed params.
5306 for (unsigned i = 0, e = FTy->getNumParams(); i != e; ++i, ++OpNum) {
5307 if (FTy->getParamType(i)->isLabelTy())
5308 Args.push_back(getBasicBlock(Record[OpNum]));
5309 else
5310 Args.push_back(getValue(Record, OpNum, NextValueNo,
5311 FTy->getParamType(i)));
5312 ArgsFullTys.push_back(FullFTy->getParamType(i));
5313 if (!Args.back())
5314 return error("Invalid record");
5315 }
5316
5317 // Read type/value pairs for varargs params.
5318 if (!FTy->isVarArg()) {
5319 if (OpNum != Record.size())
5320 return error("Invalid record");
5321 } else {
5322 while (OpNum != Record.size()) {
5323 Value *Op;
5324 Type *FullTy;
5325 if (getValueTypePair(Record, OpNum, NextValueNo, Op, &FullTy))
5326 return error("Invalid record");
5327 Args.push_back(Op);
5328 ArgsFullTys.push_back(FullTy);
5329 }
5330 }
5331
5332 I = CallInst::Create(FTy, Callee, Args, OperandBundles);
5333 FullTy = FullFTy->getReturnType();
5334 OperandBundles.clear();
5335 InstructionList.push_back(I);
5336 cast<CallInst>(I)->setCallingConv(
5337 static_cast<CallingConv::ID>((0x7ff & CCInfo) >> bitc::CALL_CCONV));
5338 CallInst::TailCallKind TCK = CallInst::TCK_None;
5339 if (CCInfo & 1 << bitc::CALL_TAIL)
5340 TCK = CallInst::TCK_Tail;
5341 if (CCInfo & (1 << bitc::CALL_MUSTTAIL))
5342 TCK = CallInst::TCK_MustTail;
5343 if (CCInfo & (1 << bitc::CALL_NOTAIL))
5344 TCK = CallInst::TCK_NoTail;
5345 cast<CallInst>(I)->setTailCallKind(TCK);
5346 cast<CallInst>(I)->setAttributes(PAL);
5347 propagateByValSRetTypes(cast<CallBase>(I), ArgsFullTys);
5348 if (FMF.any()) {
5349 if (!isa<FPMathOperator>(I))
5350 return error("Fast-math-flags specified for call without "
5351 "floating-point scalar or vector return type");
5352 I->setFastMathFlags(FMF);
5353 }
5354 break;
5355 }
5356 case bitc::FUNC_CODE_INST_VAARG: { // VAARG: [valistty, valist, instty]
5357 if (Record.size() < 3)
5358 return error("Invalid record");
5359 Type *OpTy = getTypeByID(Record[0]);
5360 Value *Op = getValue(Record, 1, NextValueNo, OpTy);
5361 FullTy = getFullyStructuredTypeByID(Record[2]);
5362 Type *ResTy = flattenPointerTypes(FullTy);
5363 if (!OpTy || !Op || !ResTy)
5364 return error("Invalid record");
5365 I = new VAArgInst(Op, ResTy);
5366 InstructionList.push_back(I);
5367 break;
5368 }
5369
5370 case bitc::FUNC_CODE_OPERAND_BUNDLE: {
5371 // A call or an invoke can be optionally prefixed with some variable
5372 // number of operand bundle blocks. These blocks are read into
5373 // OperandBundles and consumed at the next call or invoke instruction.
5374
5375 if (Record.empty() || Record[0] >= BundleTags.size())
5376 return error("Invalid record");
5377
5378 std::vector<Value *> Inputs;
5379
5380 unsigned OpNum = 1;
5381 while (OpNum != Record.size()) {
5382 Value *Op;
5383 if (getValueTypePair(Record, OpNum, NextValueNo, Op))
5384 return error("Invalid record");
5385 Inputs.push_back(Op);
5386 }
5387
5388 OperandBundles.emplace_back(BundleTags[Record[0]], std::move(Inputs));
5389 continue;
5390 }
5391
5392 case bitc::FUNC_CODE_INST_FREEZE: { // FREEZE: [opty,opval]
5393 unsigned OpNum = 0;
5394 Value *Op = nullptr;
5395 if (getValueTypePair(Record, OpNum, NextValueNo, Op, &FullTy))
5396 return error("Invalid record");
5397 if (OpNum != Record.size())
5398 return error("Invalid record");
5399
5400 I = new FreezeInst(Op);
5401 InstructionList.push_back(I);
5402 break;
5403 }
5404 }
5405
5406 // Add instruction to end of current BB. If there is no current BB, reject
5407 // this file.
5408 if (!CurBB) {
5409 I->deleteValue();
5410 return error("Invalid instruction with no BB");
5411 }
5412 if (!OperandBundles.empty()) {
5413 I->deleteValue();
5414 return error("Operand bundles found with no consumer");
5415 }
5416 CurBB->getInstList().push_back(I);
5417
5418 // If this was a terminator instruction, move to the next block.
5419 if (I->isTerminator()) {
5420 ++CurBBNo;
5421 CurBB = CurBBNo < FunctionBBs.size() ? FunctionBBs[CurBBNo] : nullptr;
5422 }
5423
5424 // Non-void values get registered in the value table for future use.
5425 if (!I->getType()->isVoidTy()) {
5426 if (!FullTy) {
5427 FullTy = I->getType();
5428 assert(((!FullTy->isPointerTy() && !isa<StructType>
(FullTy) && !isa<ArrayType>(FullTy) && (
!isa<VectorType>(FullTy) || cast<VectorType>(FullTy
)->getElementType()->isFloatingPointTy() || cast<VectorType
>(FullTy)->getElementType()->isIntegerTy()) &&
"Structured types must be assigned with corresponding non-opaque "
"pointer type") ? static_cast<void> (0) : __assert_fail
("!FullTy->isPointerTy() && !isa<StructType>(FullTy) && !isa<ArrayType>(FullTy) && (!isa<VectorType>(FullTy) || cast<VectorType>(FullTy)->getElementType()->isFloatingPointTy() || cast<VectorType>(FullTy)->getElementType()->isIntegerTy()) && \"Structured types must be assigned with corresponding non-opaque \" \"pointer type\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 5435, __PRETTY_FUNCTION__))
5429 !FullTy->isPointerTy() && !isa<StructType>(FullTy) &&((!FullTy->isPointerTy() && !isa<StructType>
(FullTy) && !isa<ArrayType>(FullTy) && (
!isa<VectorType>(FullTy) || cast<VectorType>(FullTy
)->getElementType()->isFloatingPointTy() || cast<VectorType
>(FullTy)->getElementType()->isIntegerTy()) &&
"Structured types must be assigned with corresponding non-opaque "
"pointer type") ? static_cast<void> (0) : __assert_fail
("!FullTy->isPointerTy() && !isa<StructType>(FullTy) && !isa<ArrayType>(FullTy) && (!isa<VectorType>(FullTy) || cast<VectorType>(FullTy)->getElementType()->isFloatingPointTy() || cast<VectorType>(FullTy)->getElementType()->isIntegerTy()) && \"Structured types must be assigned with corresponding non-opaque \" \"pointer type\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 5435, __PRETTY_FUNCTION__))
5430 !isa<ArrayType>(FullTy) &&((!FullTy->isPointerTy() && !isa<StructType>
(FullTy) && !isa<ArrayType>(FullTy) && (
!isa<VectorType>(FullTy) || cast<VectorType>(FullTy
)->getElementType()->isFloatingPointTy() || cast<VectorType
>(FullTy)->getElementType()->isIntegerTy()) &&
"Structured types must be assigned with corresponding non-opaque "
"pointer type") ? static_cast<void> (0) : __assert_fail
("!FullTy->isPointerTy() && !isa<StructType>(FullTy) && !isa<ArrayType>(FullTy) && (!isa<VectorType>(FullTy) || cast<VectorType>(FullTy)->getElementType()->isFloatingPointTy() || cast<VectorType>(FullTy)->getElementType()->isIntegerTy()) && \"Structured types must be assigned with corresponding non-opaque \" \"pointer type\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 5435, __PRETTY_FUNCTION__))
5431 (!isa<VectorType>(FullTy) ||((!FullTy->isPointerTy() && !isa<StructType>
(FullTy) && !isa<ArrayType>(FullTy) && (
!isa<VectorType>(FullTy) || cast<VectorType>(FullTy
)->getElementType()->isFloatingPointTy() || cast<VectorType
>(FullTy)->getElementType()->isIntegerTy()) &&
"Structured types must be assigned with corresponding non-opaque "
"pointer type") ? static_cast<void> (0) : __assert_fail
("!FullTy->isPointerTy() && !isa<StructType>(FullTy) && !isa<ArrayType>(FullTy) && (!isa<VectorType>(FullTy) || cast<VectorType>(FullTy)->getElementType()->isFloatingPointTy() || cast<VectorType>(FullTy)->getElementType()->isIntegerTy()) && \"Structured types must be assigned with corresponding non-opaque \" \"pointer type\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 5435, __PRETTY_FUNCTION__))
5432 cast<VectorType>(FullTy)->getElementType()->isFloatingPointTy() ||((!FullTy->isPointerTy() && !isa<StructType>
(FullTy) && !isa<ArrayType>(FullTy) && (
!isa<VectorType>(FullTy) || cast<VectorType>(FullTy
)->getElementType()->isFloatingPointTy() || cast<VectorType
>(FullTy)->getElementType()->isIntegerTy()) &&
"Structured types must be assigned with corresponding non-opaque "
"pointer type") ? static_cast<void> (0) : __assert_fail
("!FullTy->isPointerTy() && !isa<StructType>(FullTy) && !isa<ArrayType>(FullTy) && (!isa<VectorType>(FullTy) || cast<VectorType>(FullTy)->getElementType()->isFloatingPointTy() || cast<VectorType>(FullTy)->getElementType()->isIntegerTy()) && \"Structured types must be assigned with corresponding non-opaque \" \"pointer type\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 5435, __PRETTY_FUNCTION__))
5433 cast<VectorType>(FullTy)->getElementType()->isIntegerTy()) &&((!FullTy->isPointerTy() && !isa<StructType>
(FullTy) && !isa<ArrayType>(FullTy) && (
!isa<VectorType>(FullTy) || cast<VectorType>(FullTy
)->getElementType()->isFloatingPointTy() || cast<VectorType
>(FullTy)->getElementType()->isIntegerTy()) &&
"Structured types must be assigned with corresponding non-opaque "
"pointer type") ? static_cast<void> (0) : __assert_fail
("!FullTy->isPointerTy() && !isa<StructType>(FullTy) && !isa<ArrayType>(FullTy) && (!isa<VectorType>(FullTy) || cast<VectorType>(FullTy)->getElementType()->isFloatingPointTy() || cast<VectorType>(FullTy)->getElementType()->isIntegerTy()) && \"Structured types must be assigned with corresponding non-opaque \" \"pointer type\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 5435, __PRETTY_FUNCTION__))
5434 "Structured types must be assigned with corresponding non-opaque "((!FullTy->isPointerTy() && !isa<StructType>
(FullTy) && !isa<ArrayType>(FullTy) && (
!isa<VectorType>(FullTy) || cast<VectorType>(FullTy
)->getElementType()->isFloatingPointTy() || cast<VectorType
>(FullTy)->getElementType()->isIntegerTy()) &&
"Structured types must be assigned with corresponding non-opaque "
"pointer type") ? static_cast<void> (0) : __assert_fail
("!FullTy->isPointerTy() && !isa<StructType>(FullTy) && !isa<ArrayType>(FullTy) && (!isa<VectorType>(FullTy) || cast<VectorType>(FullTy)->getElementType()->isFloatingPointTy() || cast<VectorType>(FullTy)->getElementType()->isIntegerTy()) && \"Structured types must be assigned with corresponding non-opaque \" \"pointer type\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 5435, __PRETTY_FUNCTION__))
5435 "pointer type")((!FullTy->isPointerTy() && !isa<StructType>
(FullTy) && !isa<ArrayType>(FullTy) && (
!isa<VectorType>(FullTy) || cast<VectorType>(FullTy
)->getElementType()->isFloatingPointTy() || cast<VectorType
>(FullTy)->getElementType()->isIntegerTy()) &&
"Structured types must be assigned with corresponding non-opaque "
"pointer type") ? static_cast<void> (0) : __assert_fail
("!FullTy->isPointerTy() && !isa<StructType>(FullTy) && !isa<ArrayType>(FullTy) && (!isa<VectorType>(FullTy) || cast<VectorType>(FullTy)->getElementType()->isFloatingPointTy() || cast<VectorType>(FullTy)->getElementType()->isIntegerTy()) && \"Structured types must be assigned with corresponding non-opaque \" \"pointer type\""
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 5435, __PRETTY_FUNCTION__))
;
5436 }
5437
5438 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-13~++20210413100635+64c24f493e5f/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 5439, __PRETTY_FUNCTION__))
5439 "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-13~++20210413100635+64c24f493e5f/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 5439, __PRETTY_FUNCTION__))
;
5440 ValueList.assignValue(I, NextValueNo++, FullTy);
5441 }
5442 }
5443
5444OutOfRecordLoop:
5445
5446 if (!OperandBundles.empty())
5447 return error("Operand bundles found with no consumer");
5448
5449 // Check the function list for unresolved values.
5450 if (Argument *A = dyn_cast<Argument>(ValueList.back())) {
5451 if (!A->getParent()) {
5452 // We found at least one unresolved value. Nuke them all to avoid leaks.
5453 for (unsigned i = ModuleValueListSize, e = ValueList.size(); i != e; ++i){
5454 if ((A = dyn_cast_or_null<Argument>(ValueList[i])) && !A->getParent()) {
5455 A->replaceAllUsesWith(UndefValue::get(A->getType()));
5456 delete A;
5457 }
5458 }
5459 return error("Never resolved value found in function");
5460 }
5461 }
5462
5463 // Unexpected unresolved metadata about to be dropped.
5464 if (MDLoader->hasFwdRefs())
5465 return error("Invalid function metadata: outgoing forward refs");
5466
5467 // Trim the value list down to the size it was before we parsed this function.
5468 ValueList.shrinkTo(ModuleValueListSize);
5469 MDLoader->shrinkTo(ModuleMDLoaderSize);
5470 std::vector<BasicBlock*>().swap(FunctionBBs);
5471 return Error::success();
5472}
5473
5474/// Find the function body in the bitcode stream
5475Error BitcodeReader::findFunctionInStream(
5476 Function *F,
5477 DenseMap<Function *, uint64_t>::iterator DeferredFunctionInfoIterator) {
5478 while (DeferredFunctionInfoIterator->second == 0) {
5479 // This is the fallback handling for the old format bitcode that
5480 // didn't contain the function index in the VST, or when we have
5481 // an anonymous function which would not have a VST entry.
5482 // Assert that we have one of those two cases.
5483 assert(VSTOffset == 0 || !F->hasName())((VSTOffset == 0 || !F->hasName()) ? static_cast<void>
(0) : __assert_fail ("VSTOffset == 0 || !F->hasName()", "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 5483, __PRETTY_FUNCTION__))
;
5484 // Parse the next body in the stream and set its position in the
5485 // DeferredFunctionInfo map.
5486 if (Error Err = rememberAndSkipFunctionBodies())
5487 return Err;
5488 }
5489 return Error::success();
5490}
5491
5492SyncScope::ID BitcodeReader::getDecodedSyncScopeID(unsigned Val) {
5493 if (Val == SyncScope::SingleThread || Val == SyncScope::System)
5494 return SyncScope::ID(Val);
5495 if (Val >= SSIDs.size())
5496 return SyncScope::System; // Map unknown synchronization scopes to system.
5497 return SSIDs[Val];
5498}
5499
5500//===----------------------------------------------------------------------===//
5501// GVMaterializer implementation
5502//===----------------------------------------------------------------------===//
5503
5504Error BitcodeReader::materialize(GlobalValue *GV) {
5505 Function *F = dyn_cast<Function>(GV);
5506 // If it's not a function or is already material, ignore the request.
5507 if (!F || !F->isMaterializable())
5508 return Error::success();
5509
5510 DenseMap<Function*, uint64_t>::iterator DFII = DeferredFunctionInfo.find(F);
5511 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-13~++20210413100635+64c24f493e5f/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 5511, __PRETTY_FUNCTION__))
;
5512 // If its position is recorded as 0, its body is somewhere in the stream
5513 // but we haven't seen it yet.
5514 if (DFII->second == 0)
5515 if (Error Err = findFunctionInStream(F, DFII))
5516 return Err;
5517
5518 // Materialize metadata before parsing any function bodies.
5519 if (Error Err = materializeMetadata())
5520 return Err;
5521
5522 // Move the bit stream to the saved position of the deferred function body.
5523 if (Error JumpFailed = Stream.JumpToBit(DFII->second))
5524 return JumpFailed;
5525 if (Error Err = parseFunctionBody(F))
5526 return Err;
5527 F->setIsMaterializable(false);
5528
5529 if (StripDebugInfo)
5530 stripDebugInfo(*F);
5531
5532 // Upgrade any old intrinsic calls in the function.
5533 for (auto &I : UpgradedIntrinsics) {
5534 for (auto UI = I.first->materialized_user_begin(), UE = I.first->user_end();
5535 UI != UE;) {
5536 User *U = *UI;
5537 ++UI;
5538 if (CallInst *CI = dyn_cast<CallInst>(U))
5539 UpgradeIntrinsicCall(CI, I.second);
5540 }
5541 }
5542
5543 // Update calls to the remangled intrinsics
5544 for (auto &I : RemangledIntrinsics)
5545 for (auto UI = I.first->materialized_user_begin(), UE = I.first->user_end();
5546 UI != UE;)
5547 // Don't expect any other users than call sites
5548 cast<CallBase>(*UI++)->setCalledFunction(I.second);
5549
5550 // Finish fn->subprogram upgrade for materialized functions.
5551 if (DISubprogram *SP = MDLoader->lookupSubprogramForFunction(F))
5552 F->setSubprogram(SP);
5553
5554 // Check if the TBAA Metadata are valid, otherwise we will need to strip them.
5555 if (!MDLoader->isStrippingTBAA()) {
5556 for (auto &I : instructions(F)) {
5557 MDNode *TBAA = I.getMetadata(LLVMContext::MD_tbaa);
5558 if (!TBAA || TBAAVerifyHelper.visitTBAAMetadata(I, TBAA))
5559 continue;
5560 MDLoader->setStripTBAA(true);
5561 stripTBAA(F->getParent());
5562 }
5563 }
5564
5565 // "Upgrade" older incorrect branch weights by dropping them.
5566 for (auto &I : instructions(F)) {
5567 if (auto *MD = I.getMetadata(LLVMContext::MD_prof)) {
5568 if (MD->getOperand(0) != nullptr && isa<MDString>(MD->getOperand(0))) {
5569 MDString *MDS = cast<MDString>(MD->getOperand(0));
5570 StringRef ProfName = MDS->getString();
5571 // Check consistency of !prof branch_weights metadata.
5572 if (!ProfName.equals("branch_weights"))
5573 continue;
5574 unsigned ExpectedNumOperands = 0;
5575 if (BranchInst *BI = dyn_cast<BranchInst>(&I))
5576 ExpectedNumOperands = BI->getNumSuccessors();
5577 else if (SwitchInst *SI = dyn_cast<SwitchInst>(&I))
5578 ExpectedNumOperands = SI->getNumSuccessors();
5579 else if (isa<CallInst>(&I))
5580 ExpectedNumOperands = 1;
5581 else if (IndirectBrInst *IBI = dyn_cast<IndirectBrInst>(&I))
5582 ExpectedNumOperands = IBI->getNumDestinations();
5583 else if (isa<SelectInst>(&I))
5584 ExpectedNumOperands = 2;
5585 else
5586 continue; // ignore and continue.
5587
5588 // If branch weight doesn't match, just strip branch weight.
5589 if (MD->getNumOperands() != 1 + ExpectedNumOperands)
5590 I.setMetadata(LLVMContext::MD_prof, nullptr);
5591 }
5592 }
5593 }
5594
5595 // Look for functions that rely on old function attribute behavior.
5596 UpgradeFunctionAttributes(*F);
5597
5598 // Bring in any functions that this function forward-referenced via
5599 // blockaddresses.
5600 return materializeForwardReferencedFunctions();
5601}
5602
5603Error BitcodeReader::materializeModule() {
5604 if (Error Err = materializeMetadata())
5605 return Err;
5606
5607 // Promise to materialize all forward references.
5608 WillMaterializeAllForwardRefs = true;
5609
5610 // Iterate over the module, deserializing any functions that are still on
5611 // disk.
5612 for (Function &F : *TheModule) {
5613 if (Error Err = materialize(&F))
5614 return Err;
5615 }
5616 // At this point, if there are any function bodies, parse the rest of
5617 // the bits in the module past the last function block we have recorded
5618 // through either lazy scanning or the VST.
5619 if (LastFunctionBlockBit || NextUnreadBit)
5620 if (Error Err = parseModule(LastFunctionBlockBit > NextUnreadBit
5621 ? LastFunctionBlockBit
5622 : NextUnreadBit))
5623 return Err;
5624
5625 // Check that all block address forward references got resolved (as we
5626 // promised above).
5627 if (!BasicBlockFwdRefs.empty())
5628 return error("Never resolved function from blockaddress");
5629
5630 // Upgrade any intrinsic calls that slipped through (should not happen!) and
5631 // delete the old functions to clean up. We can't do this unless the entire
5632 // module is materialized because there could always be another function body
5633 // with calls to the old function.
5634 for (auto &I : UpgradedIntrinsics) {
5635 for (auto *U : I.first->users()) {
5636 if (CallInst *CI = dyn_cast<CallInst>(U))
5637 UpgradeIntrinsicCall(CI, I.second);
5638 }
5639 if (!I.first->use_empty())
5640 I.first->replaceAllUsesWith(I.second);
5641 I.first->eraseFromParent();
5642 }
5643 UpgradedIntrinsics.clear();
5644 // Do the same for remangled intrinsics
5645 for (auto &I : RemangledIntrinsics) {
5646 I.first->replaceAllUsesWith(I.second);
5647 I.first->eraseFromParent();
5648 }
5649 RemangledIntrinsics.clear();
5650
5651 UpgradeDebugInfo(*TheModule);
5652
5653 UpgradeModuleFlags(*TheModule);
5654
5655 UpgradeARCRuntime(*TheModule);
5656
5657 return Error::success();
5658}
5659
5660std::vector<StructType *> BitcodeReader::getIdentifiedStructTypes() const {
5661 return IdentifiedStructTypes;
5662}
5663
5664ModuleSummaryIndexBitcodeReader::ModuleSummaryIndexBitcodeReader(
5665 BitstreamCursor Cursor, StringRef Strtab, ModuleSummaryIndex &TheIndex,
5666 StringRef ModulePath, unsigned ModuleId)
5667 : BitcodeReaderBase(std::move(Cursor), Strtab), TheIndex(TheIndex),
5668 ModulePath(ModulePath), ModuleId(ModuleId) {}
5669
5670void ModuleSummaryIndexBitcodeReader::addThisModule() {
5671 TheIndex.addModule(ModulePath, ModuleId);
5672}
5673
5674ModuleSummaryIndex::ModuleInfo *
5675ModuleSummaryIndexBitcodeReader::getThisModule() {
5676 return TheIndex.getModule(ModulePath);
5677}
5678
5679std::pair<ValueInfo, GlobalValue::GUID>
5680ModuleSummaryIndexBitcodeReader::getValueInfoFromValueId(unsigned ValueId) {
5681 auto VGI = ValueIdToValueInfoMap[ValueId];
5682 assert(VGI.first)((VGI.first) ? static_cast<void> (0) : __assert_fail ("VGI.first"
, "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 5682, __PRETTY_FUNCTION__))
;
5683 return VGI;
5684}
5685
5686void ModuleSummaryIndexBitcodeReader::setValueGUID(
5687 uint64_t ValueID, StringRef ValueName, GlobalValue::LinkageTypes Linkage,
5688 StringRef SourceFileName) {
5689 std::string GlobalId =
5690 GlobalValue::getGlobalIdentifier(ValueName, Linkage, SourceFileName);
5691 auto ValueGUID = GlobalValue::getGUID(GlobalId);
5692 auto OriginalNameID = ValueGUID;
5693 if (GlobalValue::isLocalLinkage(Linkage))
5694 OriginalNameID = GlobalValue::getGUID(ValueName);
5695 if (PrintSummaryGUIDs)
5696 dbgs() << "GUID " << ValueGUID << "(" << OriginalNameID << ") is "
5697 << ValueName << "\n";
5698
5699 // UseStrtab is false for legacy summary formats and value names are
5700 // created on stack. In that case we save the name in a string saver in
5701 // the index so that the value name can be recorded.
5702 ValueIdToValueInfoMap[ValueID] = std::make_pair(
5703 TheIndex.getOrInsertValueInfo(
5704 ValueGUID,
5705 UseStrtab ? ValueName : TheIndex.saveString(ValueName)),
5706 OriginalNameID);
5707}
5708
5709// Specialized value symbol table parser used when reading module index
5710// blocks where we don't actually create global values. The parsed information
5711// is saved in the bitcode reader for use when later parsing summaries.
5712Error ModuleSummaryIndexBitcodeReader::parseValueSymbolTable(
5713 uint64_t Offset,
5714 DenseMap<unsigned, GlobalValue::LinkageTypes> &ValueIdToLinkageMap) {
5715 // With a strtab the VST is not required to parse the summary.
5716 if (UseStrtab)
5717 return Error::success();
5718
5719 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-13~++20210413100635+64c24f493e5f/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 5719, __PRETTY_FUNCTION__))
;
5720 Expected<uint64_t> MaybeCurrentBit = jumpToValueSymbolTable(Offset, Stream);
5721 if (!MaybeCurrentBit)
5722 return MaybeCurrentBit.takeError();
5723 uint64_t CurrentBit = MaybeCurrentBit.get();
5724
5725 if (Error Err = Stream.EnterSubBlock(bitc::VALUE_SYMTAB_BLOCK_ID))
5726 return Err;
5727
5728 SmallVector<uint64_t, 64> Record;
5729
5730 // Read all the records for this value table.
5731 SmallString<128> ValueName;
5732
5733 while (true) {
5734 Expected<BitstreamEntry> MaybeEntry = Stream.advanceSkippingSubblocks();
5735 if (!MaybeEntry)
5736 return MaybeEntry.takeError();
5737 BitstreamEntry Entry = MaybeEntry.get();
5738
5739 switch (Entry.Kind) {
5740 case BitstreamEntry::SubBlock: // Handled for us already.
5741 case BitstreamEntry::Error:
5742 return error("Malformed block");
5743 case BitstreamEntry::EndBlock:
5744 // Done parsing VST, jump back to wherever we came from.
5745 if (Error JumpFailed = Stream.JumpToBit(CurrentBit))
5746 return JumpFailed;
5747 return Error::success();
5748 case BitstreamEntry::Record:
5749 // The interesting case.
5750 break;
5751 }
5752
5753 // Read a record.
5754 Record.clear();
5755 Expected<unsigned> MaybeRecord = Stream.readRecord(Entry.ID, Record);
5756 if (!MaybeRecord)
5757 return MaybeRecord.takeError();
5758 switch (MaybeRecord.get()) {
5759 default: // Default behavior: ignore (e.g. VST_CODE_BBENTRY records).
5760 break;
5761 case bitc::VST_CODE_ENTRY: { // VST_CODE_ENTRY: [valueid, namechar x N]
5762 if (convertToString(Record, 1, ValueName))
5763 return error("Invalid record");
5764 unsigned ValueID = Record[0];
5765 assert(!SourceFileName.empty())((!SourceFileName.empty()) ? static_cast<void> (0) : __assert_fail
("!SourceFileName.empty()", "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 5765, __PRETTY_FUNCTION__))
;
5766 auto VLI = ValueIdToLinkageMap.find(ValueID);
5767 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-13~++20210413100635+64c24f493e5f/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 5768, __PRETTY_FUNCTION__))
5768 "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-13~++20210413100635+64c24f493e5f/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 5768, __PRETTY_FUNCTION__))
;
5769 auto Linkage = VLI->second;
5770 setValueGUID(ValueID, ValueName, Linkage, SourceFileName);
5771 ValueName.clear();
5772 break;
5773 }
5774 case bitc::VST_CODE_FNENTRY: {
5775 // VST_CODE_FNENTRY: [valueid, offset, namechar x N]
5776 if (convertToString(Record, 2, ValueName))
5777 return error("Invalid record");
5778 unsigned ValueID = Record[0];
5779 assert(!SourceFileName.empty())((!SourceFileName.empty()) ? static_cast<void> (0) : __assert_fail
("!SourceFileName.empty()", "/build/llvm-toolchain-snapshot-13~++20210413100635+64c24f493e5f/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 5779, __PRETTY_FUNCTION__))
;
5780 auto VLI = ValueIdToLinkageMap.find(ValueID);
5781 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-13~++20210413100635+64c24f493e5f/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 5782, __PRETTY_FUNCTION__))
5782 "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-13~++20210413100635+64c24f493e5f/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 5782, __PRETTY_FUNCTION__))
;
5783 auto Linkage = VLI->second;
5784 setValueGUID(ValueID, ValueName, Linkage, SourceFileName);
5785 ValueName.clear();
5786 break;
5787 }
5788 case bitc::VST_CODE_COMBINED_ENTRY: {
5789 // VST_CODE_COMBINED_ENTRY: [valueid, refguid]
5790 unsigned ValueID = Record[0];
5791 GlobalValue::GUID RefGUID = Record[1];
5792 // The "original name", which is the second value of the pair will be
5793 // overriden later by a FS_COMBINED_ORIGINAL_NAME in the combined index.
5794 ValueIdToValueInfoMap[ValueID] =
5795 std::make_pair(TheIndex.getOrInsertValueInfo(RefGUID), RefGUID);
5796 break;
5797 }
5798 }
5799 }
5800}
5801
5802// Parse just the blocks needed for building the index out of the module.
5803// At the end of this routine the module Index is populated with a map
5804// from global value id to GlobalValueSummary objects.
5805Error ModuleSummaryIndexBitcodeReader::parseModule() {
5806 if (Error Err = Stream.EnterSubBlock(bitc::MODULE_BLOCK_ID))
5807 return Err;
5808
5809 SmallVector<uint64_t, 64> Record;
5810 DenseMap<unsigned, GlobalValue::LinkageTypes> ValueIdToLinkageMap;
5811 unsigned ValueId = 0;
5812
5813 // Read the index for this module.
5814 while (true) {
5815 Expected<llvm::BitstreamEntry> MaybeEntry = Stream.advance();
5816 if (!MaybeEntry)
5817 return MaybeEntry.takeError();
5818 llvm::BitstreamEntry Entry = MaybeEntry.get();
5819
5820 switch (Entry.Kind) {
5821 case BitstreamEntry::Error:
5822 return error("Malformed block");
5823 case BitstreamEntry::EndBlock:
5824 return Error::success();
5825
5826 case BitstreamEntry::SubBlock:
5827 switch (Entry.ID) {
5828 default: // Skip unknown content.
5829 if (Error Err = Stream.SkipBlock())
5830 return Err;
5831 break;
5832 case bitc::BLOCKINFO_BLOCK_ID:
5833 // Need to parse these to get abbrev ids (e.g. for VST)
5834 if (readBlockInfo())
5835 return error("Malformed block");
5836 break;
5837 case bitc::VALUE_SYMTAB_BLOCK_ID:
5838 // Should have been parsed earlier via VSTOffset, unless there
5839 // is no summary section.
5840 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-13~++20210413100635+64c24f493e5f/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 5842, __PRETTY_FUNCTION__))
5841 !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-13~++20210413100635+64c24f493e5f/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 5842, __PRETTY_FUNCTION__))
5842 "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-13~++20210413100635+64c24f493e5f/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 5842, __PRETTY_FUNCTION__))
;
5843 if (Error Err = Stream.SkipBlock())
5844 return Err;
5845 break;
5846 case bitc::GLOBALVAL_SUMMARY_BLOCK_ID:
5847 case bitc::FULL_LTO_GLOBALVAL_SUMMARY_BLOCK_ID:
5848 // Add the module if it is a per-module index (has a source file name).
5849 if (!SourceFileName.empty())
5850 addThisModule();
5851 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-13~++20210413100635+64c24f493e5f/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 5852, __PRETTY_FUNCTION__))
5852 "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-13~++20210413100635+64c24f493e5f/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 5852, __PRETTY_FUNCTION__))
;
5853 // We might not have a VST if there were no values in the
5854 // summary. An empty summary block generated when we are
5855 // performing ThinLTO compiles so we don't later invoke
5856 // the regular LTO process on them.
5857 if (VSTOffset > 0) {
5858 if (Error Err = parseValueSymbolTable(VSTOffset, ValueIdToLinkageMap))
5859 return Err;
5860 SeenValueSymbolTable = true;
5861 }
5862 SeenGlobalValSummary = true;
5863 if (Error Err = parseEntireSummary(Entry.ID))
5864 return Err;
5865 break;
5866 case bitc::MODULE_STRTAB_BLOCK_ID:
5867 if (Error Err = parseModuleStringTable())
5868 return Err;
5869 break;
5870 }
5871 continue;
5872
5873 case BitstreamEntry::Record: {
5874 Record.clear();
5875 Expected<unsigned> MaybeBitCode = Stream.readRecord(Entry.ID, Record);
5876 if (!MaybeBitCode)
5877 return MaybeBitCode.takeError();
5878 switch (MaybeBitCode.get()) {
5879 default:
5880 break; // Default behavior, ignore unknown content.
5881 case bitc::MODULE_CODE_VERSION: {
5882 if (Error Err = parseVersionRecord(Record).takeError())
5883 return Err;
5884 break;
5885 }
5886 /// MODULE_CODE_SOURCE_FILENAME: [namechar x N]
5887 case bitc::MODULE_CODE_SOURCE_FILENAME: {
5888 SmallString<128> ValueName;
5889 if (convertToString(Record, 0, ValueName))
5890 return error("Invalid record");
5891 SourceFileName = ValueName.c_str();
5892 break;
5893 }
5894 /// MODULE_CODE_HASH: [5*i32]
5895 case bitc::MODULE_CODE_HASH: {
5896 if (Record.size() != 5)
5897 return error("Invalid hash length " + Twine(Record.size()).str());
5898 auto &Hash = getThisModule()->second.second;
5899 int Pos = 0;
5900 for (auto &Val : Record) {
5901 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-13~++20210413100635+64c24f493e5f/llvm/lib/Bitcode/Reader/BitcodeReader.cpp"
, 5901, __PRETTY_FUNCTION__))
;
5902 Hash[Pos++] = Val;
5903 }
5904 break;
5905 }
5906 /// MODULE_CODE_VSTOFFSET: [offset]
5907 case bitc::MODULE_CODE_VSTOFFSET:
5908 if (Record.empty())
5909 return error("Invalid record");
5910 // Note that we subtract 1 here because the offset is relative to one
5911 // word before the start of the identification or module block, which
5912 // was historically always the start of the regular bitcode header.
5913 VSTOffset = Record[0] - 1;
5914 break;
5915 // v1 GLOBALVAR: [pointer type, isconst, initid, linkage, ...]
5916 // v1 FUNCTION: [type, callingconv, isproto, linkage, ...]
5917 // v1 ALIAS: [alias type, addrspace, aliasee val#, linkage, ...]
5918 // v2: [strtab offset, strtab size, v1]
5919 case bitc::MODULE_CODE_GLOBALVAR:
5920 case bitc::MODULE_CODE_FUNCTION:
5921 case bitc::MODULE_CODE_ALIAS: {
5922 StringRef Name;
5923 ArrayRef<uint64_t> GVRecord;
5924 std::tie(Name, GVRecord) = readNameFromStrtab(Record);
5925 if (GVRecord.size() <= 3)
5926 return error("Invalid record");
5927 uint64_t RawLinkage = GVRecord[3];
5928 GlobalValue::LinkageTypes Linkage = getDecodedLinkage(RawLinkage);
5929 if (!UseStrtab) {
5930 ValueIdToLinkageMap[ValueId++] = Linkage;
5931 break;
5932 }
5933
5934 setValueGUID(ValueId++, Name, Linkage, SourceFileName);
5935 break;
5936 }
5937 }
5938 }
5939 continue;
5940 }
5941 }
5942}
5943
5944std::vector<ValueInfo>
5945ModuleSummaryIndexBitcodeReader::makeRefList(ArrayRef<uint64_t> Record) {
5946 std::vector<ValueInfo> Ret;
5947 Ret.reserve(Record.size());
5948 for (uint64_t RefValueId : Record)
5949 Ret.push_back(getValueInfoFromValueId(RefValueId).first);
5950 return Ret;
5951}
5952
5953std::vector<FunctionSummary::EdgeTy>
5954ModuleSummaryIndexBitcodeReader::makeCallList(ArrayRef<uint64_t> Record,
5955 bool IsOldProfileFormat,
5956 bool HasProfile, bool HasRelBF) {
5957 std::vector<FunctionSummary::EdgeTy> Ret;
5958 Ret.reserve(Record.size());
5959 for (unsigned I = 0, E = Record.size(); I != E; ++I) {
5960 CalleeInfo::HotnessType Hotness = CalleeInfo::HotnessType::Unknown;
5961 uint64_t RelBF = 0;
5962 ValueInfo Callee = getValueInfoFromValueId(Record[I]).first;
5963 if (IsOldProfileFormat) {
5964 I += 1; // Skip old callsitecount field
5965 if (HasProfile)
5966 I += 1; // Skip old profilecount field
5967 } else if (HasProfile)
5968 Hotness = static_cast<CalleeInfo::HotnessType>(Record[++I]);