Bug Summary

File:build/source/llvm/lib/Bitcode/Reader/BitcodeAnalyzer.cpp
Warning:line 441, column 20
The left operand of '==' is a garbage value

Annotated Source Code

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clang -cc1 -cc1 -triple x86_64-pc-linux-gnu -analyze -disable-free -clear-ast-before-backend -disable-llvm-verifier -discard-value-names -main-file-name BitcodeAnalyzer.cpp -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 -mframe-pointer=none -fmath-errno -ffp-contract=on -fno-rounding-math -mconstructor-aliases -funwind-tables=2 -target-cpu x86-64 -tune-cpu generic -debugger-tuning=gdb -ffunction-sections -fdata-sections -fcoverage-compilation-dir=/build/source/build-llvm/tools/clang/stage2-bins -resource-dir /usr/lib/llvm-17/lib/clang/17 -D _DEBUG -D _GLIBCXX_ASSERTIONS -D _GNU_SOURCE -D _LIBCPP_ENABLE_ASSERTIONS -D __STDC_CONSTANT_MACROS -D __STDC_FORMAT_MACROS -D __STDC_LIMIT_MACROS -I lib/Bitcode/Reader -I /build/source/llvm/lib/Bitcode/Reader -I include -I /build/source/llvm/include -D _FORTIFY_SOURCE=2 -D NDEBUG -U NDEBUG -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/10/../../../../include/x86_64-linux-gnu/c++/10 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10/backward -internal-isystem /usr/lib/llvm-17/lib/clang/17/include -internal-isystem /usr/local/include -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/10/../../../../x86_64-linux-gnu/include -internal-externc-isystem /usr/include/x86_64-linux-gnu -internal-externc-isystem /include -internal-externc-isystem /usr/include -fmacro-prefix-map=/build/source/build-llvm/tools/clang/stage2-bins=build-llvm/tools/clang/stage2-bins -fmacro-prefix-map=/build/source/= -fcoverage-prefix-map=/build/source/build-llvm/tools/clang/stage2-bins=build-llvm/tools/clang/stage2-bins -fcoverage-prefix-map=/build/source/= -source-date-epoch 1683717183 -O2 -Wno-unused-command-line-argument -Wno-unused-parameter -Wwrite-strings -Wno-missing-field-initializers -Wno-long-long -Wno-maybe-uninitialized -Wno-class-memaccess -Wno-redundant-move -Wno-pessimizing-move -Wno-noexcept-type -Wno-comment -Wno-misleading-indentation -std=c++17 -fdeprecated-macro -fdebug-compilation-dir=/build/source/build-llvm/tools/clang/stage2-bins -fdebug-prefix-map=/build/source/build-llvm/tools/clang/stage2-bins=build-llvm/tools/clang/stage2-bins -fdebug-prefix-map=/build/source/= -ferror-limit 19 -fvisibility-inlines-hidden -stack-protector 2 -fgnuc-version=4.2.1 -fcolor-diagnostics -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-2023-05-10-133810-16478-1 -x c++ /build/source/llvm/lib/Bitcode/Reader/BitcodeAnalyzer.cpp
1//===- BitcodeAnalyzer.cpp - Internal BitcodeAnalyzer 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/BitcodeAnalyzer.h"
10#include "llvm/Bitcode/BitcodeReader.h"
11#include "llvm/Bitcode/LLVMBitCodes.h"
12#include "llvm/Bitstream/BitCodes.h"
13#include "llvm/Bitstream/BitstreamReader.h"
14#include "llvm/Support/Format.h"
15#include "llvm/Support/SHA1.h"
16#include <optional>
17
18using namespace llvm;
19
20static Error reportError(StringRef Message) {
21 return createStringError(std::errc::illegal_byte_sequence, Message.data());
22}
23
24/// Return a symbolic block name if known, otherwise return null.
25static std::optional<const char *>
26GetBlockName(unsigned BlockID, const BitstreamBlockInfo &BlockInfo,
27 CurStreamTypeType CurStreamType) {
28 // Standard blocks for all bitcode files.
29 if (BlockID < bitc::FIRST_APPLICATION_BLOCKID) {
30 if (BlockID == bitc::BLOCKINFO_BLOCK_ID)
31 return "BLOCKINFO_BLOCK";
32 return std::nullopt;
33 }
34
35 // Check to see if we have a blockinfo record for this block, with a name.
36 if (const BitstreamBlockInfo::BlockInfo *Info =
37 BlockInfo.getBlockInfo(BlockID)) {
38 if (!Info->Name.empty())
39 return Info->Name.c_str();
40 }
41
42 if (CurStreamType != LLVMIRBitstream)
43 return std::nullopt;
44
45 switch (BlockID) {
46 default:
47 return std::nullopt;
48 case bitc::OPERAND_BUNDLE_TAGS_BLOCK_ID:
49 return "OPERAND_BUNDLE_TAGS_BLOCK";
50 case bitc::MODULE_BLOCK_ID:
51 return "MODULE_BLOCK";
52 case bitc::PARAMATTR_BLOCK_ID:
53 return "PARAMATTR_BLOCK";
54 case bitc::PARAMATTR_GROUP_BLOCK_ID:
55 return "PARAMATTR_GROUP_BLOCK_ID";
56 case bitc::TYPE_BLOCK_ID_NEW:
57 return "TYPE_BLOCK_ID";
58 case bitc::CONSTANTS_BLOCK_ID:
59 return "CONSTANTS_BLOCK";
60 case bitc::FUNCTION_BLOCK_ID:
61 return "FUNCTION_BLOCK";
62 case bitc::IDENTIFICATION_BLOCK_ID:
63 return "IDENTIFICATION_BLOCK_ID";
64 case bitc::VALUE_SYMTAB_BLOCK_ID:
65 return "VALUE_SYMTAB";
66 case bitc::METADATA_BLOCK_ID:
67 return "METADATA_BLOCK";
68 case bitc::METADATA_KIND_BLOCK_ID:
69 return "METADATA_KIND_BLOCK";
70 case bitc::METADATA_ATTACHMENT_ID:
71 return "METADATA_ATTACHMENT_BLOCK";
72 case bitc::USELIST_BLOCK_ID:
73 return "USELIST_BLOCK_ID";
74 case bitc::GLOBALVAL_SUMMARY_BLOCK_ID:
75 return "GLOBALVAL_SUMMARY_BLOCK";
76 case bitc::FULL_LTO_GLOBALVAL_SUMMARY_BLOCK_ID:
77 return "FULL_LTO_GLOBALVAL_SUMMARY_BLOCK";
78 case bitc::MODULE_STRTAB_BLOCK_ID:
79 return "MODULE_STRTAB_BLOCK";
80 case bitc::STRTAB_BLOCK_ID:
81 return "STRTAB_BLOCK";
82 case bitc::SYMTAB_BLOCK_ID:
83 return "SYMTAB_BLOCK";
84 }
85}
86
87/// Return a symbolic code name if known, otherwise return null.
88static std::optional<const char *>
89GetCodeName(unsigned CodeID, unsigned BlockID,
90 const BitstreamBlockInfo &BlockInfo,
91 CurStreamTypeType CurStreamType) {
92 // Standard blocks for all bitcode files.
93 if (BlockID < bitc::FIRST_APPLICATION_BLOCKID) {
94 if (BlockID == bitc::BLOCKINFO_BLOCK_ID) {
95 switch (CodeID) {
96 default:
97 return std::nullopt;
98 case bitc::BLOCKINFO_CODE_SETBID:
99 return "SETBID";
100 case bitc::BLOCKINFO_CODE_BLOCKNAME:
101 return "BLOCKNAME";
102 case bitc::BLOCKINFO_CODE_SETRECORDNAME:
103 return "SETRECORDNAME";
104 }
105 }
106 return std::nullopt;
107 }
108
109 // Check to see if we have a blockinfo record for this record, with a name.
110 if (const BitstreamBlockInfo::BlockInfo *Info =
111 BlockInfo.getBlockInfo(BlockID)) {
112 for (const std::pair<unsigned, std::string> &RN : Info->RecordNames)
113 if (RN.first == CodeID)
114 return RN.second.c_str();
115 }
116
117 if (CurStreamType != LLVMIRBitstream)
118 return std::nullopt;
119
120#define STRINGIFY_CODE(PREFIX, CODE) \
121 case bitc::PREFIX##_##CODE: \
122 return #CODE;
123 switch (BlockID) {
124 default:
125 return std::nullopt;
126 case bitc::MODULE_BLOCK_ID:
127 switch (CodeID) {
128 default:
129 return std::nullopt;
130 STRINGIFY_CODE(MODULE_CODE, VERSION)
131 STRINGIFY_CODE(MODULE_CODE, TRIPLE)
132 STRINGIFY_CODE(MODULE_CODE, DATALAYOUT)
133 STRINGIFY_CODE(MODULE_CODE, ASM)
134 STRINGIFY_CODE(MODULE_CODE, SECTIONNAME)
135 STRINGIFY_CODE(MODULE_CODE, DEPLIB) // Deprecated, present in old bitcode
136 STRINGIFY_CODE(MODULE_CODE, GLOBALVAR)
137 STRINGIFY_CODE(MODULE_CODE, FUNCTION)
138 STRINGIFY_CODE(MODULE_CODE, ALIAS)
139 STRINGIFY_CODE(MODULE_CODE, GCNAME)
140 STRINGIFY_CODE(MODULE_CODE, COMDAT)
141 STRINGIFY_CODE(MODULE_CODE, VSTOFFSET)
142 STRINGIFY_CODE(MODULE_CODE, METADATA_VALUES_UNUSED)
143 STRINGIFY_CODE(MODULE_CODE, SOURCE_FILENAME)
144 STRINGIFY_CODE(MODULE_CODE, HASH)
145 }
146 case bitc::IDENTIFICATION_BLOCK_ID:
147 switch (CodeID) {
148 default:
149 return std::nullopt;
150 STRINGIFY_CODE(IDENTIFICATION_CODE, STRING)
151 STRINGIFY_CODE(IDENTIFICATION_CODE, EPOCH)
152 }
153 case bitc::PARAMATTR_BLOCK_ID:
154 switch (CodeID) {
155 default:
156 return std::nullopt;
157 // FIXME: Should these be different?
158 case bitc::PARAMATTR_CODE_ENTRY_OLD:
159 return "ENTRY";
160 case bitc::PARAMATTR_CODE_ENTRY:
161 return "ENTRY";
162 }
163 case bitc::PARAMATTR_GROUP_BLOCK_ID:
164 switch (CodeID) {
165 default:
166 return std::nullopt;
167 case bitc::PARAMATTR_GRP_CODE_ENTRY:
168 return "ENTRY";
169 }
170 case bitc::TYPE_BLOCK_ID_NEW:
171 switch (CodeID) {
172 default:
173 return std::nullopt;
174 STRINGIFY_CODE(TYPE_CODE, NUMENTRY)
175 STRINGIFY_CODE(TYPE_CODE, VOID)
176 STRINGIFY_CODE(TYPE_CODE, FLOAT)
177 STRINGIFY_CODE(TYPE_CODE, DOUBLE)
178 STRINGIFY_CODE(TYPE_CODE, LABEL)
179 STRINGIFY_CODE(TYPE_CODE, OPAQUE)
180 STRINGIFY_CODE(TYPE_CODE, INTEGER)
181 STRINGIFY_CODE(TYPE_CODE, POINTER)
182 STRINGIFY_CODE(TYPE_CODE, HALF)
183 STRINGIFY_CODE(TYPE_CODE, ARRAY)
184 STRINGIFY_CODE(TYPE_CODE, VECTOR)
185 STRINGIFY_CODE(TYPE_CODE, X86_FP80)
186 STRINGIFY_CODE(TYPE_CODE, FP128)
187 STRINGIFY_CODE(TYPE_CODE, PPC_FP128)
188 STRINGIFY_CODE(TYPE_CODE, METADATA)
189 STRINGIFY_CODE(TYPE_CODE, X86_MMX)
190 STRINGIFY_CODE(TYPE_CODE, STRUCT_ANON)
191 STRINGIFY_CODE(TYPE_CODE, STRUCT_NAME)
192 STRINGIFY_CODE(TYPE_CODE, STRUCT_NAMED)
193 STRINGIFY_CODE(TYPE_CODE, FUNCTION)
194 STRINGIFY_CODE(TYPE_CODE, TOKEN)
195 STRINGIFY_CODE(TYPE_CODE, BFLOAT)
196 }
197
198 case bitc::CONSTANTS_BLOCK_ID:
199 switch (CodeID) {
200 default:
201 return std::nullopt;
202 STRINGIFY_CODE(CST_CODE, SETTYPE)
203 STRINGIFY_CODE(CST_CODE, NULL__null)
204 STRINGIFY_CODE(CST_CODE, UNDEF)
205 STRINGIFY_CODE(CST_CODE, INTEGER)
206 STRINGIFY_CODE(CST_CODE, WIDE_INTEGER)
207 STRINGIFY_CODE(CST_CODE, FLOAT)
208 STRINGIFY_CODE(CST_CODE, AGGREGATE)
209 STRINGIFY_CODE(CST_CODE, STRING)
210 STRINGIFY_CODE(CST_CODE, CSTRING)
211 STRINGIFY_CODE(CST_CODE, CE_BINOP)
212 STRINGIFY_CODE(CST_CODE, CE_CAST)
213 STRINGIFY_CODE(CST_CODE, CE_GEP)
214 STRINGIFY_CODE(CST_CODE, CE_INBOUNDS_GEP)
215 STRINGIFY_CODE(CST_CODE, CE_SELECT)
216 STRINGIFY_CODE(CST_CODE, CE_EXTRACTELT)
217 STRINGIFY_CODE(CST_CODE, CE_INSERTELT)
218 STRINGIFY_CODE(CST_CODE, CE_SHUFFLEVEC)
219 STRINGIFY_CODE(CST_CODE, CE_CMP)
220 STRINGIFY_CODE(CST_CODE, INLINEASM)
221 STRINGIFY_CODE(CST_CODE, CE_SHUFVEC_EX)
222 STRINGIFY_CODE(CST_CODE, CE_UNOP)
223 STRINGIFY_CODE(CST_CODE, DSO_LOCAL_EQUIVALENT)
224 STRINGIFY_CODE(CST_CODE, NO_CFI_VALUE)
225 case bitc::CST_CODE_BLOCKADDRESS:
226 return "CST_CODE_BLOCKADDRESS";
227 STRINGIFY_CODE(CST_CODE, DATA)
228 }
229 case bitc::FUNCTION_BLOCK_ID:
230 switch (CodeID) {
231 default:
232 return std::nullopt;
233 STRINGIFY_CODE(FUNC_CODE, DECLAREBLOCKS)
234 STRINGIFY_CODE(FUNC_CODE, INST_BINOP)
235 STRINGIFY_CODE(FUNC_CODE, INST_CAST)
236 STRINGIFY_CODE(FUNC_CODE, INST_GEP_OLD)
237 STRINGIFY_CODE(FUNC_CODE, INST_INBOUNDS_GEP_OLD)
238 STRINGIFY_CODE(FUNC_CODE, INST_SELECT)
239 STRINGIFY_CODE(FUNC_CODE, INST_EXTRACTELT)
240 STRINGIFY_CODE(FUNC_CODE, INST_INSERTELT)
241 STRINGIFY_CODE(FUNC_CODE, INST_SHUFFLEVEC)
242 STRINGIFY_CODE(FUNC_CODE, INST_CMP)
243 STRINGIFY_CODE(FUNC_CODE, INST_RET)
244 STRINGIFY_CODE(FUNC_CODE, INST_BR)
245 STRINGIFY_CODE(FUNC_CODE, INST_SWITCH)
246 STRINGIFY_CODE(FUNC_CODE, INST_INVOKE)
247 STRINGIFY_CODE(FUNC_CODE, INST_UNOP)
248 STRINGIFY_CODE(FUNC_CODE, INST_UNREACHABLE)
249 STRINGIFY_CODE(FUNC_CODE, INST_CLEANUPRET)
250 STRINGIFY_CODE(FUNC_CODE, INST_CATCHRET)
251 STRINGIFY_CODE(FUNC_CODE, INST_CATCHPAD)
252 STRINGIFY_CODE(FUNC_CODE, INST_PHI)
253 STRINGIFY_CODE(FUNC_CODE, INST_ALLOCA)
254 STRINGIFY_CODE(FUNC_CODE, INST_LOAD)
255 STRINGIFY_CODE(FUNC_CODE, INST_VAARG)
256 STRINGIFY_CODE(FUNC_CODE, INST_STORE)
257 STRINGIFY_CODE(FUNC_CODE, INST_EXTRACTVAL)
258 STRINGIFY_CODE(FUNC_CODE, INST_INSERTVAL)
259 STRINGIFY_CODE(FUNC_CODE, INST_CMP2)
260 STRINGIFY_CODE(FUNC_CODE, INST_VSELECT)
261 STRINGIFY_CODE(FUNC_CODE, DEBUG_LOC_AGAIN)
262 STRINGIFY_CODE(FUNC_CODE, INST_CALL)
263 STRINGIFY_CODE(FUNC_CODE, DEBUG_LOC)
264 STRINGIFY_CODE(FUNC_CODE, INST_GEP)
265 STRINGIFY_CODE(FUNC_CODE, OPERAND_BUNDLE)
266 STRINGIFY_CODE(FUNC_CODE, INST_FENCE)
267 STRINGIFY_CODE(FUNC_CODE, INST_ATOMICRMW)
268 STRINGIFY_CODE(FUNC_CODE, INST_LOADATOMIC)
269 STRINGIFY_CODE(FUNC_CODE, INST_STOREATOMIC)
270 STRINGIFY_CODE(FUNC_CODE, INST_CMPXCHG)
271 STRINGIFY_CODE(FUNC_CODE, INST_CALLBR)
272 STRINGIFY_CODE(FUNC_CODE, BLOCKADDR_USERS)
273 }
274 case bitc::VALUE_SYMTAB_BLOCK_ID:
275 switch (CodeID) {
276 default:
277 return std::nullopt;
278 STRINGIFY_CODE(VST_CODE, ENTRY)
279 STRINGIFY_CODE(VST_CODE, BBENTRY)
280 STRINGIFY_CODE(VST_CODE, FNENTRY)
281 STRINGIFY_CODE(VST_CODE, COMBINED_ENTRY)
282 }
283 case bitc::MODULE_STRTAB_BLOCK_ID:
284 switch (CodeID) {
285 default:
286 return std::nullopt;
287 STRINGIFY_CODE(MST_CODE, ENTRY)
288 STRINGIFY_CODE(MST_CODE, HASH)
289 }
290 case bitc::GLOBALVAL_SUMMARY_BLOCK_ID:
291 case bitc::FULL_LTO_GLOBALVAL_SUMMARY_BLOCK_ID:
292 switch (CodeID) {
293 default:
294 return std::nullopt;
295 STRINGIFY_CODE(FS, PERMODULE)
296 STRINGIFY_CODE(FS, PERMODULE_PROFILE)
297 STRINGIFY_CODE(FS, PERMODULE_RELBF)
298 STRINGIFY_CODE(FS, PERMODULE_GLOBALVAR_INIT_REFS)
299 STRINGIFY_CODE(FS, PERMODULE_VTABLE_GLOBALVAR_INIT_REFS)
300 STRINGIFY_CODE(FS, COMBINED)
301 STRINGIFY_CODE(FS, COMBINED_PROFILE)
302 STRINGIFY_CODE(FS, COMBINED_GLOBALVAR_INIT_REFS)
303 STRINGIFY_CODE(FS, ALIAS)
304 STRINGIFY_CODE(FS, COMBINED_ALIAS)
305 STRINGIFY_CODE(FS, COMBINED_ORIGINAL_NAME)
306 STRINGIFY_CODE(FS, VERSION)
307 STRINGIFY_CODE(FS, FLAGS)
308 STRINGIFY_CODE(FS, TYPE_TESTS)
309 STRINGIFY_CODE(FS, TYPE_TEST_ASSUME_VCALLS)
310 STRINGIFY_CODE(FS, TYPE_CHECKED_LOAD_VCALLS)
311 STRINGIFY_CODE(FS, TYPE_TEST_ASSUME_CONST_VCALL)
312 STRINGIFY_CODE(FS, TYPE_CHECKED_LOAD_CONST_VCALL)
313 STRINGIFY_CODE(FS, VALUE_GUID)
314 STRINGIFY_CODE(FS, CFI_FUNCTION_DEFS)
315 STRINGIFY_CODE(FS, CFI_FUNCTION_DECLS)
316 STRINGIFY_CODE(FS, TYPE_ID)
317 STRINGIFY_CODE(FS, TYPE_ID_METADATA)
318 STRINGIFY_CODE(FS, BLOCK_COUNT)
319 STRINGIFY_CODE(FS, PARAM_ACCESS)
320 STRINGIFY_CODE(FS, PERMODULE_CALLSITE_INFO)
321 STRINGIFY_CODE(FS, PERMODULE_ALLOC_INFO)
322 STRINGIFY_CODE(FS, COMBINED_CALLSITE_INFO)
323 STRINGIFY_CODE(FS, COMBINED_ALLOC_INFO)
324 STRINGIFY_CODE(FS, STACK_IDS)
325 }
326 case bitc::METADATA_ATTACHMENT_ID:
327 switch (CodeID) {
328 default:
329 return std::nullopt;
330 STRINGIFY_CODE(METADATA, ATTACHMENT)
331 }
332 case bitc::METADATA_BLOCK_ID:
333 switch (CodeID) {
334 default:
335 return std::nullopt;
336 STRINGIFY_CODE(METADATA, STRING_OLD)
337 STRINGIFY_CODE(METADATA, VALUE)
338 STRINGIFY_CODE(METADATA, NODE)
339 STRINGIFY_CODE(METADATA, NAME)
340 STRINGIFY_CODE(METADATA, DISTINCT_NODE)
341 STRINGIFY_CODE(METADATA, KIND) // Older bitcode has it in a MODULE_BLOCK
342 STRINGIFY_CODE(METADATA, LOCATION)
343 STRINGIFY_CODE(METADATA, OLD_NODE)
344 STRINGIFY_CODE(METADATA, OLD_FN_NODE)
345 STRINGIFY_CODE(METADATA, NAMED_NODE)
346 STRINGIFY_CODE(METADATA, GENERIC_DEBUG)
347 STRINGIFY_CODE(METADATA, SUBRANGE)
348 STRINGIFY_CODE(METADATA, ENUMERATOR)
349 STRINGIFY_CODE(METADATA, BASIC_TYPE)
350 STRINGIFY_CODE(METADATA, FILE)
351 STRINGIFY_CODE(METADATA, DERIVED_TYPE)
352 STRINGIFY_CODE(METADATA, COMPOSITE_TYPE)
353 STRINGIFY_CODE(METADATA, SUBROUTINE_TYPE)
354 STRINGIFY_CODE(METADATA, COMPILE_UNIT)
355 STRINGIFY_CODE(METADATA, SUBPROGRAM)
356 STRINGIFY_CODE(METADATA, LEXICAL_BLOCK)
357 STRINGIFY_CODE(METADATA, LEXICAL_BLOCK_FILE)
358 STRINGIFY_CODE(METADATA, NAMESPACE)
359 STRINGIFY_CODE(METADATA, TEMPLATE_TYPE)
360 STRINGIFY_CODE(METADATA, TEMPLATE_VALUE)
361 STRINGIFY_CODE(METADATA, GLOBAL_VAR)
362 STRINGIFY_CODE(METADATA, LOCAL_VAR)
363 STRINGIFY_CODE(METADATA, EXPRESSION)
364 STRINGIFY_CODE(METADATA, OBJC_PROPERTY)
365 STRINGIFY_CODE(METADATA, IMPORTED_ENTITY)
366 STRINGIFY_CODE(METADATA, MODULE)
367 STRINGIFY_CODE(METADATA, MACRO)
368 STRINGIFY_CODE(METADATA, MACRO_FILE)
369 STRINGIFY_CODE(METADATA, STRINGS)
370 STRINGIFY_CODE(METADATA, GLOBAL_DECL_ATTACHMENT)
371 STRINGIFY_CODE(METADATA, GLOBAL_VAR_EXPR)
372 STRINGIFY_CODE(METADATA, INDEX_OFFSET)
373 STRINGIFY_CODE(METADATA, INDEX)
374 STRINGIFY_CODE(METADATA, ARG_LIST)
375 }
376 case bitc::METADATA_KIND_BLOCK_ID:
377 switch (CodeID) {
378 default:
379 return std::nullopt;
380 STRINGIFY_CODE(METADATA, KIND)
381 }
382 case bitc::USELIST_BLOCK_ID:
383 switch (CodeID) {
384 default:
385 return std::nullopt;
386 case bitc::USELIST_CODE_DEFAULT:
387 return "USELIST_CODE_DEFAULT";
388 case bitc::USELIST_CODE_BB:
389 return "USELIST_CODE_BB";
390 }
391
392 case bitc::OPERAND_BUNDLE_TAGS_BLOCK_ID:
393 switch (CodeID) {
394 default:
395 return std::nullopt;
396 case bitc::OPERAND_BUNDLE_TAG:
397 return "OPERAND_BUNDLE_TAG";
398 }
399 case bitc::STRTAB_BLOCK_ID:
400 switch (CodeID) {
401 default:
402 return std::nullopt;
403 case bitc::STRTAB_BLOB:
404 return "BLOB";
405 }
406 case bitc::SYMTAB_BLOCK_ID:
407 switch (CodeID) {
408 default:
409 return std::nullopt;
410 case bitc::SYMTAB_BLOB:
411 return "BLOB";
412 }
413 }
414#undef STRINGIFY_CODE
415}
416
417static void printSize(raw_ostream &OS, double Bits) {
418 OS << format("%.2f/%.2fB/%luW", Bits, Bits / 8, (unsigned long)(Bits / 32));
419}
420static void printSize(raw_ostream &OS, uint64_t Bits) {
421 OS << format("%lub/%.2fB/%luW", (unsigned long)Bits, (double)Bits / 8,
422 (unsigned long)(Bits / 32));
423}
424
425static Expected<CurStreamTypeType> ReadSignature(BitstreamCursor &Stream) {
426 auto tryRead = [&Stream](char &Dest, size_t size) -> Error {
427 if (Expected<SimpleBitstreamCursor::word_t> MaybeWord = Stream.Read(size))
5
←
Taking false branch
→
428 Dest = MaybeWord.get();
429 else
430 return MaybeWord.takeError();
6
←
Returning without writing to 'Dest'
→
431 return Error::success();
432 };
433
434 char Signature[6];
435 if (Error Err = tryRead(Signature[0], 8))
4
←
Calling 'operator()'
→
7
←
Returning from 'operator()'
→
8
←
Assuming the condition is false
→
9
←
Taking false branch
→
436 return std::move(Err);
437 if (Error Err = tryRead(Signature[1], 8))
10
←
Assuming the condition is false
→
11
←
Taking false branch
→
438 return std::move(Err);
439
440 // Autodetect the file contents, if it is one we know.
441 if (Signature[0] == 'C' && Signature[1] == 'P') {
12
←
The left operand of '==' is a garbage value
442 if (Error Err = tryRead(Signature[2], 8))
443 return std::move(Err);
444 if (Error Err = tryRead(Signature[3], 8))
445 return std::move(Err);
446 if (Signature[2] == 'C' && Signature[3] == 'H')
447 return ClangSerializedASTBitstream;
448 } else if (Signature[0] == 'D' && Signature[1] == 'I') {
449 if (Error Err = tryRead(Signature[2], 8))
450 return std::move(Err);
451 if (Error Err = tryRead(Signature[3], 8))
452 return std::move(Err);
453 if (Signature[2] == 'A' && Signature[3] == 'G')
454 return ClangSerializedDiagnosticsBitstream;
455 } else if (Signature[0] == 'R' && Signature[1] == 'M') {
456 if (Error Err = tryRead(Signature[2], 8))
457 return std::move(Err);
458 if (Error Err = tryRead(Signature[3], 8))
459 return std::move(Err);
460 if (Signature[2] == 'R' && Signature[3] == 'K')
461 return LLVMBitstreamRemarks;
462 } else {
463 if (Error Err = tryRead(Signature[2], 4))
464 return std::move(Err);
465 if (Error Err = tryRead(Signature[3], 4))
466 return std::move(Err);
467 if (Error Err = tryRead(Signature[4], 4))
468 return std::move(Err);
469 if (Error Err = tryRead(Signature[5], 4))
470 return std::move(Err);
471 if (Signature[0] == 'B' && Signature[1] == 'C' && Signature[2] == 0x0 &&
472 Signature[3] == 0xC && Signature[4] == 0xE && Signature[5] == 0xD)
473 return LLVMIRBitstream;
474 }
475 return UnknownBitstream;
476}
477
478static Expected<CurStreamTypeType> analyzeHeader(std::optional<BCDumpOptions> O,
479 BitstreamCursor &Stream) {
480 ArrayRef<uint8_t> Bytes = Stream.getBitcodeBytes();
481 const unsigned char *BufPtr = (const unsigned char *)Bytes.data();
482 const unsigned char *EndBufPtr = BufPtr + Bytes.size();
483
484 // If we have a wrapper header, parse it and ignore the non-bc file
485 // contents. The magic number is 0x0B17C0DE stored in little endian.
486 if (isBitcodeWrapper(BufPtr, EndBufPtr)) {
2
←
Taking false branch
→
487 if (Bytes.size() < BWH_HeaderSize)
488 return reportError("Invalid bitcode wrapper header");
489
490 if (O) {
491 unsigned Magic = support::endian::read32le(&BufPtr[BWH_MagicField]);
492 unsigned Version = support::endian::read32le(&BufPtr[BWH_VersionField]);
493 unsigned Offset = support::endian::read32le(&BufPtr[BWH_OffsetField]);
494 unsigned Size = support::endian::read32le(&BufPtr[BWH_SizeField]);
495 unsigned CPUType = support::endian::read32le(&BufPtr[BWH_CPUTypeField]);
496
497 O->OS << "<BITCODE_WRAPPER_HEADER"
498 << " Magic=" << format_hex(Magic, 10)
499 << " Version=" << format_hex(Version, 10)
500 << " Offset=" << format_hex(Offset, 10)
501 << " Size=" << format_hex(Size, 10)
502 << " CPUType=" << format_hex(CPUType, 10) << "/>\n";
503 }
504
505 if (SkipBitcodeWrapperHeader(BufPtr, EndBufPtr, true))
506 return reportError("Invalid bitcode wrapper header");
507 }
508
509 // Use the cursor modified by skipping the wrapper header.
510 Stream = BitstreamCursor(ArrayRef<uint8_t>(BufPtr, EndBufPtr));
511
512 return ReadSignature(Stream);
3
←
Calling 'ReadSignature'
→
513}
514
515static bool canDecodeBlob(unsigned Code, unsigned BlockID) {
516 return BlockID == bitc::METADATA_BLOCK_ID && Code == bitc::METADATA_STRINGS;
517}
518
519Error BitcodeAnalyzer::decodeMetadataStringsBlob(StringRef Indent,
520 ArrayRef<uint64_t> Record,
521 StringRef Blob,
522 raw_ostream &OS) {
523 if (Blob.empty())
524 return reportError("Cannot decode empty blob.");
525
526 if (Record.size() != 2)
527 return reportError(
528 "Decoding metadata strings blob needs two record entries.");
529
530 unsigned NumStrings = Record[0];
531 unsigned StringsOffset = Record[1];
532 OS << " num-strings = " << NumStrings << " {\n";
533
534 StringRef Lengths = Blob.slice(0, StringsOffset);
535 SimpleBitstreamCursor R(Lengths);
536 StringRef Strings = Blob.drop_front(StringsOffset);
537 do {
538 if (R.AtEndOfStream())
539 return reportError("bad length");
540
541 uint32_t Size;
542 if (Error E = R.ReadVBR(6).moveInto(Size))
543 return E;
544 if (Strings.size() < Size)
545 return reportError("truncated chars");
546
547 OS << Indent << " '";
548 OS.write_escaped(Strings.slice(0, Size), /*hex=*/true);
549 OS << "'\n";
550 Strings = Strings.drop_front(Size);
551 } while (--NumStrings);
552
553 OS << Indent << " }";
554 return Error::success();
555}
556
557BitcodeAnalyzer::BitcodeAnalyzer(StringRef Buffer,
558 std::optional<StringRef> BlockInfoBuffer)
559 : Stream(Buffer) {
560 if (BlockInfoBuffer)
561 BlockInfoStream.emplace(*BlockInfoBuffer);
562}
563
564Error BitcodeAnalyzer::analyze(std::optional<BCDumpOptions> O,
565 std::optional<StringRef> CheckHash) {
566 if (Error E = analyzeHeader(O, Stream).moveInto(CurStreamType))
1
Calling 'analyzeHeader'
→
567 return E;
568
569 Stream.setBlockInfo(&BlockInfo);
570
571 // Read block info from BlockInfoStream, if specified.
572 // The block info must be a top-level block.
573 if (BlockInfoStream) {
574 BitstreamCursor BlockInfoCursor(*BlockInfoStream);
575 if (Error E = analyzeHeader(O, BlockInfoCursor).takeError())
576 return E;
577
578 while (!BlockInfoCursor.AtEndOfStream()) {
579 Expected<unsigned> MaybeCode = BlockInfoCursor.ReadCode();
580 if (!MaybeCode)
581 return MaybeCode.takeError();
582 if (MaybeCode.get() != bitc::ENTER_SUBBLOCK)
583 return reportError("Invalid record at top-level in block info file");
584
585 Expected<unsigned> MaybeBlockID = BlockInfoCursor.ReadSubBlockID();
586 if (!MaybeBlockID)
587 return MaybeBlockID.takeError();
588 if (MaybeBlockID.get() == bitc::BLOCKINFO_BLOCK_ID) {
589 std::optional<BitstreamBlockInfo> NewBlockInfo;
590 if (Error E =
591 BlockInfoCursor.ReadBlockInfoBlock(/*ReadBlockInfoNames=*/true)
592 .moveInto(NewBlockInfo))
593 return E;
594 if (!NewBlockInfo)
595 return reportError("Malformed BlockInfoBlock in block info file");
596 BlockInfo = std::move(*NewBlockInfo);
597 break;
598 }
599
600 if (Error Err = BlockInfoCursor.SkipBlock())
601 return Err;
602 }
603 }
604
605 // Parse the top-level structure. We only allow blocks at the top-level.
606 while (!Stream.AtEndOfStream()) {
607 Expected<unsigned> MaybeCode = Stream.ReadCode();
608 if (!MaybeCode)
609 return MaybeCode.takeError();
610 if (MaybeCode.get() != bitc::ENTER_SUBBLOCK)
611 return reportError("Invalid record at top-level");
612
613 Expected<unsigned> MaybeBlockID = Stream.ReadSubBlockID();
614 if (!MaybeBlockID)
615 return MaybeBlockID.takeError();
616
617 if (Error E = parseBlock(MaybeBlockID.get(), 0, O, CheckHash))
618 return E;
619 ++NumTopBlocks;
620 }
621
622 return Error::success();
623}
624
625void BitcodeAnalyzer::printStats(BCDumpOptions O,
626 std::optional<StringRef> Filename) {
627 uint64_t BufferSizeBits = Stream.getBitcodeBytes().size() * CHAR_BIT8;
628 // Print a summary of the read file.
629 O.OS << "Summary ";
630 if (Filename)
631 O.OS << "of " << Filename->data() << ":\n";
632 O.OS << " Total size: ";
633 printSize(O.OS, BufferSizeBits);
634 O.OS << "\n";
635 O.OS << " Stream type: ";
636 switch (CurStreamType) {
637 case UnknownBitstream:
638 O.OS << "unknown\n";
639 break;
640 case LLVMIRBitstream:
641 O.OS << "LLVM IR\n";
642 break;
643 case ClangSerializedASTBitstream:
644 O.OS << "Clang Serialized AST\n";
645 break;
646 case ClangSerializedDiagnosticsBitstream:
647 O.OS << "Clang Serialized Diagnostics\n";
648 break;
649 case LLVMBitstreamRemarks:
650 O.OS << "LLVM Remarks\n";
651 break;
652 }
653 O.OS << " # Toplevel Blocks: " << NumTopBlocks << "\n";
654 O.OS << "\n";
655
656 // Emit per-block stats.
657 O.OS << "Per-block Summary:\n";
658 for (const auto &Stat : BlockIDStats) {
659 O.OS << " Block ID #" << Stat.first;
660 if (std::optional<const char *> BlockName =
661 GetBlockName(Stat.first, BlockInfo, CurStreamType))
662 O.OS << " (" << *BlockName << ")";
663 O.OS << ":\n";
664
665 const PerBlockIDStats &Stats = Stat.second;
666 O.OS << " Num Instances: " << Stats.NumInstances << "\n";
667 O.OS << " Total Size: ";
668 printSize(O.OS, Stats.NumBits);
669 O.OS << "\n";
670 double pct = (Stats.NumBits * 100.0) / BufferSizeBits;
671 O.OS << " Percent of file: " << format("%2.4f%%", pct) << "\n";
672 if (Stats.NumInstances > 1) {
673 O.OS << " Average Size: ";
674 printSize(O.OS, Stats.NumBits / (double)Stats.NumInstances);
675 O.OS << "\n";
676 O.OS << " Tot/Avg SubBlocks: " << Stats.NumSubBlocks << "/"
677 << Stats.NumSubBlocks / (double)Stats.NumInstances << "\n";
678 O.OS << " Tot/Avg Abbrevs: " << Stats.NumAbbrevs << "/"
679 << Stats.NumAbbrevs / (double)Stats.NumInstances << "\n";
680 O.OS << " Tot/Avg Records: " << Stats.NumRecords << "/"
681 << Stats.NumRecords / (double)Stats.NumInstances << "\n";
682 } else {
683 O.OS << " Num SubBlocks: " << Stats.NumSubBlocks << "\n";
684 O.OS << " Num Abbrevs: " << Stats.NumAbbrevs << "\n";
685 O.OS << " Num Records: " << Stats.NumRecords << "\n";
686 }
687 if (Stats.NumRecords) {
688 double pct = (Stats.NumAbbreviatedRecords * 100.0) / Stats.NumRecords;
689 O.OS << " Percent Abbrevs: " << format("%2.4f%%", pct) << "\n";
690 }
691 O.OS << "\n";
692
693 // Print a histogram of the codes we see.
694 if (O.Histogram && !Stats.CodeFreq.empty()) {
695 std::vector<std::pair<unsigned, unsigned>> FreqPairs; // <freq,code>
696 for (unsigned i = 0, e = Stats.CodeFreq.size(); i != e; ++i)
697 if (unsigned Freq = Stats.CodeFreq[i].NumInstances)
698 FreqPairs.push_back(std::make_pair(Freq, i));
699 llvm::stable_sort(FreqPairs);
700 std::reverse(FreqPairs.begin(), FreqPairs.end());
701
702 O.OS << "\tRecord Histogram:\n";
703 O.OS << "\t\t Count # Bits b/Rec % Abv Record Kind\n";
704 for (const auto &FreqPair : FreqPairs) {
705 const PerRecordStats &RecStats = Stats.CodeFreq[FreqPair.second];
706
707 O.OS << format("\t\t%7d %9lu", RecStats.NumInstances,
708 (unsigned long)RecStats.TotalBits);
709
710 if (RecStats.NumInstances > 1)
711 O.OS << format(" %9.1f",
712 (double)RecStats.TotalBits / RecStats.NumInstances);
713 else
714 O.OS << " ";
715
716 if (RecStats.NumAbbrev)
717 O.OS << format(" %7.2f", (double)RecStats.NumAbbrev /
718 RecStats.NumInstances * 100);
719 else
720 O.OS << " ";
721
722 O.OS << " ";
723 if (std::optional<const char *> CodeName = GetCodeName(
724 FreqPair.second, Stat.first, BlockInfo, CurStreamType))
725 O.OS << *CodeName << "\n";
726 else
727 O.OS << "UnknownCode" << FreqPair.second << "\n";
728 }
729 O.OS << "\n";
730 }
731 }
732}
733
734Error BitcodeAnalyzer::parseBlock(unsigned BlockID, unsigned IndentLevel,
735 std::optional<BCDumpOptions> O,
736 std::optional<StringRef> CheckHash) {
737 std::string Indent(IndentLevel * 2, ' ');
738 uint64_t BlockBitStart = Stream.GetCurrentBitNo();
739
740 // Get the statistics for this BlockID.
741 PerBlockIDStats &BlockStats = BlockIDStats[BlockID];
742
743 BlockStats.NumInstances++;
744
745 // BLOCKINFO is a special part of the stream.
746 bool DumpRecords = O.has_value();
747 if (BlockID == bitc::BLOCKINFO_BLOCK_ID) {
748 if (O && !O->DumpBlockinfo)
749 O->OS << Indent << "<BLOCKINFO_BLOCK/>\n";
750 std::optional<BitstreamBlockInfo> NewBlockInfo;
751 if (Error E = Stream.ReadBlockInfoBlock(/*ReadBlockInfoNames=*/true)
752 .moveInto(NewBlockInfo))
753 return E;
754 if (!NewBlockInfo)
755 return reportError("Malformed BlockInfoBlock");
756 BlockInfo = std::move(*NewBlockInfo);
757 if (Error Err = Stream.JumpToBit(BlockBitStart))
758 return Err;
759 // It's not really interesting to dump the contents of the blockinfo
760 // block, so only do it if the user explicitly requests it.
761 DumpRecords = O && O->DumpBlockinfo;
762 }
763
764 unsigned NumWords = 0;
765 if (Error Err = Stream.EnterSubBlock(BlockID, &NumWords))
766 return Err;
767
768 // Keep it for later, when we see a MODULE_HASH record
769 uint64_t BlockEntryPos = Stream.getCurrentByteNo();
770
771 std::optional<const char *> BlockName;
772 if (DumpRecords) {
773 O->OS << Indent << "<";
774 if ((BlockName = GetBlockName(BlockID, BlockInfo, CurStreamType)))
775 O->OS << *BlockName;
776 else
777 O->OS << "UnknownBlock" << BlockID;
778
779 if (!O->Symbolic && BlockName)
780 O->OS << " BlockID=" << BlockID;
781
782 O->OS << " NumWords=" << NumWords
783 << " BlockCodeSize=" << Stream.getAbbrevIDWidth() << ">\n";
784 }
785
786 SmallVector<uint64_t, 64> Record;
787
788 // Keep the offset to the metadata index if seen.
789 uint64_t MetadataIndexOffset = 0;
790
791 // Read all the records for this block.
792 while (true) {
793 if (Stream.AtEndOfStream())
794 return reportError("Premature end of bitstream");
795
796 uint64_t RecordStartBit = Stream.GetCurrentBitNo();
797
798 BitstreamEntry Entry;
799 if (Error E = Stream.advance(BitstreamCursor::AF_DontAutoprocessAbbrevs)
800 .moveInto(Entry))
801 return E;
802
803 switch (Entry.Kind) {
804 case BitstreamEntry::Error:
805 return reportError("malformed bitcode file");
806 case BitstreamEntry::EndBlock: {
807 uint64_t BlockBitEnd = Stream.GetCurrentBitNo();
808 BlockStats.NumBits += BlockBitEnd - BlockBitStart;
809 if (DumpRecords) {
810 O->OS << Indent << "</";
811 if (BlockName)
812 O->OS << *BlockName << ">\n";
813 else
814 O->OS << "UnknownBlock" << BlockID << ">\n";
815 }
816 return Error::success();
817 }
818
819 case BitstreamEntry::SubBlock: {
820 uint64_t SubBlockBitStart = Stream.GetCurrentBitNo();
821 if (Error E = parseBlock(Entry.ID, IndentLevel + 1, O, CheckHash))
822 return E;
823 ++BlockStats.NumSubBlocks;
824 uint64_t SubBlockBitEnd = Stream.GetCurrentBitNo();
825
826 // Don't include subblock sizes in the size of this block.
827 BlockBitStart += SubBlockBitEnd - SubBlockBitStart;
828 continue;
829 }
830 case BitstreamEntry::Record:
831 // The interesting case.
832 break;
833 }
834
835 if (Entry.ID == bitc::DEFINE_ABBREV) {
836 if (Error Err = Stream.ReadAbbrevRecord())
837 return Err;
838 ++BlockStats.NumAbbrevs;
839 continue;
840 }
841
842 Record.clear();
843
844 ++BlockStats.NumRecords;
845
846 StringRef Blob;
847 uint64_t CurrentRecordPos = Stream.GetCurrentBitNo();
848 unsigned Code;
849 if (Error E = Stream.readRecord(Entry.ID, Record, &Blob).moveInto(Code))
850 return E;
851
852 // Increment the # occurrences of this code.
853 if (BlockStats.CodeFreq.size() <= Code)
854 BlockStats.CodeFreq.resize(Code + 1);
855 BlockStats.CodeFreq[Code].NumInstances++;
856 BlockStats.CodeFreq[Code].TotalBits +=
857 Stream.GetCurrentBitNo() - RecordStartBit;
858 if (Entry.ID != bitc::UNABBREV_RECORD) {
859 BlockStats.CodeFreq[Code].NumAbbrev++;
860 ++BlockStats.NumAbbreviatedRecords;
861 }
862
863 if (DumpRecords) {
864 O->OS << Indent << " <";
865 std::optional<const char *> CodeName =
866 GetCodeName(Code, BlockID, BlockInfo, CurStreamType);
867 if (CodeName)
868 O->OS << *CodeName;
869 else
870 O->OS << "UnknownCode" << Code;
871 if (!O->Symbolic && CodeName)
872 O->OS << " codeid=" << Code;
873 const BitCodeAbbrev *Abbv = nullptr;
874 if (Entry.ID != bitc::UNABBREV_RECORD) {
875 Expected<const BitCodeAbbrev *> MaybeAbbv = Stream.getAbbrev(Entry.ID);
876 if (!MaybeAbbv)
877 return MaybeAbbv.takeError();
878 Abbv = MaybeAbbv.get();
879 O->OS << " abbrevid=" << Entry.ID;
880 }
881
882 for (unsigned i = 0, e = Record.size(); i != e; ++i)
883 O->OS << " op" << i << "=" << (int64_t)Record[i];
884
885 // If we found a metadata index, let's verify that we had an offset
886 // before and validate its forward reference offset was correct!
887 if (BlockID == bitc::METADATA_BLOCK_ID) {
888 if (Code == bitc::METADATA_INDEX_OFFSET) {
889 if (Record.size() != 2)
890 O->OS << "(Invalid record)";
891 else {
892 auto Offset = Record[0] + (Record[1] << 32);
893 MetadataIndexOffset = Stream.GetCurrentBitNo() + Offset;
894 }
895 }
896 if (Code == bitc::METADATA_INDEX) {
897 O->OS << " (offset ";
898 if (MetadataIndexOffset == RecordStartBit)
899 O->OS << "match)";
900 else
901 O->OS << "mismatch: " << MetadataIndexOffset << " vs "
902 << RecordStartBit << ")";
903 }
904 }
905
906 // If we found a module hash, let's verify that it matches!
907 if (BlockID == bitc::MODULE_BLOCK_ID && Code == bitc::MODULE_CODE_HASH &&
908 CheckHash) {
909 if (Record.size() != 5)
910 O->OS << " (invalid)";
911 else {
912 // Recompute the hash and compare it to the one in the bitcode
913 SHA1 Hasher;
914 std::array<uint8_t, 20> Hash;
915 Hasher.update(*CheckHash);
916 {
917 int BlockSize = (CurrentRecordPos / 8) - BlockEntryPos;
918 auto Ptr = Stream.getPointerToByte(BlockEntryPos, BlockSize);
919 Hasher.update(ArrayRef<uint8_t>(Ptr, BlockSize));
920 Hash = Hasher.result();
921 }
922 std::array<uint8_t, 20> RecordedHash;
923 int Pos = 0;
924 for (auto &Val : Record) {
925 assert(!(Val >> 32) && "Unexpected high bits set")(static_cast <bool> (!(Val >> 32) && "Unexpected high bits set"
) ? void (0) : __assert_fail ("!(Val >> 32) && \"Unexpected high bits set\""
, "llvm/lib/Bitcode/Reader/BitcodeAnalyzer.cpp", 925, __extension__
__PRETTY_FUNCTION__));
926 support::endian::write32be(&RecordedHash[Pos], Val);
927 Pos += 4;
928 }
929 if (Hash == RecordedHash)
930 O->OS << " (match)";
931 else
932 O->OS << " (!mismatch!)";
933 }
934 }
935
936 O->OS << "/>";
937
938 if (Abbv) {
939 for (unsigned i = 1, e = Abbv->getNumOperandInfos(); i != e; ++i) {
940 const BitCodeAbbrevOp &Op = Abbv->getOperandInfo(i);
941 if (!Op.isEncoding() || Op.getEncoding() != BitCodeAbbrevOp::Array)
942 continue;
943 assert(i + 2 == e && "Array op not second to last")(static_cast <bool> (i + 2 == e && "Array op not second to last"
) ? void (0) : __assert_fail ("i + 2 == e && \"Array op not second to last\""
, "llvm/lib/Bitcode/Reader/BitcodeAnalyzer.cpp", 943, __extension__
__PRETTY_FUNCTION__));
944 std::string Str;
945 bool ArrayIsPrintable = true;
946 for (unsigned j = i - 1, je = Record.size(); j != je; ++j) {
947 if (!isPrint(static_cast<unsigned char>(Record[j]))) {
948 ArrayIsPrintable = false;
949 break;
950 }
951 Str += (char)Record[j];
952 }
953 if (ArrayIsPrintable)
954 O->OS << " record string = '" << Str << "'";
955 break;
956 }
957 }
958
959 if (Blob.data()) {
960 if (canDecodeBlob(Code, BlockID)) {
961 if (Error E = decodeMetadataStringsBlob(Indent, Record, Blob, O->OS))
962 return E;
963 } else {
964 O->OS << " blob data = ";
965 if (O->ShowBinaryBlobs) {
966 O->OS << "'";
967 O->OS.write_escaped(Blob, /*hex=*/true) << "'";
968 } else {
969 bool BlobIsPrintable = true;
970 for (char C : Blob)
971 if (!isPrint(static_cast<unsigned char>(C))) {
972 BlobIsPrintable = false;
973 break;
974 }
975
976 if (BlobIsPrintable)
977 O->OS << "'" << Blob << "'";
978 else
979 O->OS << "unprintable, " << Blob.size() << " bytes.";
980 }
981 }
982 }
983
984 O->OS << "\n";
985 }
986
987 // Make sure that we can skip the current record.
988 if (Error Err = Stream.JumpToBit(CurrentRecordPos))
989 return Err;
990 if (Expected<unsigned> Skipped = Stream.skipRecord(Entry.ID))
991 ; // Do nothing.
992 else
993 return Skipped.takeError();
994 }
995}
996