1 //===-- llvm-bcanalyzer.cpp - Bitcode Analyzer --------------------------===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 // 10 // This tool may be invoked in the following manner: 11 // llvm-bcanalyzer [options] - Read LLVM bitcode from stdin 12 // llvm-bcanalyzer [options] x.bc - Read LLVM bitcode from the x.bc file 13 // 14 // Options: 15 // --help - Output information about command line switches 16 // --dump - Dump low-level bitcode structure in readable format 17 // 18 // This tool provides analytical information about a bitcode file. It is 19 // intended as an aid to developers of bitcode reading and writing software. It 20 // produces on std::out a summary of the bitcode file that shows various 21 // statistics about the contents of the file. By default this information is 22 // detailed and contains information about individual bitcode blocks and the 23 // functions in the module. 24 // The tool is also able to print a bitcode file in a straight forward text 25 // format that shows the containment and relationships of the information in 26 // the bitcode file (-dump option). 27 // 28 //===----------------------------------------------------------------------===// 29 30 #include "llvm/Bitcode/BitstreamReader.h" 31 #include "llvm/Bitcode/LLVMBitCodes.h" 32 #include "llvm/Bitcode/ReaderWriter.h" 33 #include "llvm/IR/Verifier.h" 34 #include "llvm/Support/CommandLine.h" 35 #include "llvm/Support/Format.h" 36 #include "llvm/Support/ManagedStatic.h" 37 #include "llvm/Support/MemoryBuffer.h" 38 #include "llvm/Support/PrettyStackTrace.h" 39 #include "llvm/Support/Signals.h" 40 #include "llvm/Support/raw_ostream.h" 41 #include <algorithm> 42 #include <cctype> 43 #include <map> 44 #include <system_error> 45 using namespace llvm; 46 47 static cl::opt<std::string> 48 InputFilename(cl::Positional, cl::desc("<input bitcode>"), cl::init("-")); 49 50 static cl::opt<bool> Dump("dump", cl::desc("Dump low level bitcode trace")); 51 52 //===----------------------------------------------------------------------===// 53 // Bitcode specific analysis. 54 //===----------------------------------------------------------------------===// 55 56 static cl::opt<bool> NoHistogram("disable-histogram", 57 cl::desc("Do not print per-code histogram")); 58 59 static cl::opt<bool> 60 NonSymbolic("non-symbolic", 61 cl::desc("Emit numeric info in dump even if" 62 " symbolic info is available")); 63 64 namespace { 65 66 /// CurStreamTypeType - A type for CurStreamType 67 enum CurStreamTypeType { 68 UnknownBitstream, 69 LLVMIRBitstream 70 }; 71 72 } 73 74 /// CurStreamType - If we can sniff the flavor of this stream, we can produce 75 /// better dump info. 76 static CurStreamTypeType CurStreamType; 77 78 79 /// GetBlockName - Return a symbolic block name if known, otherwise return 80 /// null. 81 static const char *GetBlockName(unsigned BlockID, 82 const BitstreamReader &StreamFile) { 83 // Standard blocks for all bitcode files. 84 if (BlockID < bitc::FIRST_APPLICATION_BLOCKID) { 85 if (BlockID == bitc::BLOCKINFO_BLOCK_ID) 86 return "BLOCKINFO_BLOCK"; 87 return nullptr; 88 } 89 90 // Check to see if we have a blockinfo record for this block, with a name. 91 if (const BitstreamReader::BlockInfo *Info = 92 StreamFile.getBlockInfo(BlockID)) { 93 if (!Info->Name.empty()) 94 return Info->Name.c_str(); 95 } 96 97 98 if (CurStreamType != LLVMIRBitstream) return nullptr; 99 100 switch (BlockID) { 101 default: return nullptr; 102 case bitc::MODULE_BLOCK_ID: return "MODULE_BLOCK"; 103 case bitc::PARAMATTR_BLOCK_ID: return "PARAMATTR_BLOCK"; 104 case bitc::PARAMATTR_GROUP_BLOCK_ID: return "PARAMATTR_GROUP_BLOCK_ID"; 105 case bitc::TYPE_BLOCK_ID_NEW: return "TYPE_BLOCK_ID"; 106 case bitc::CONSTANTS_BLOCK_ID: return "CONSTANTS_BLOCK"; 107 case bitc::FUNCTION_BLOCK_ID: return "FUNCTION_BLOCK"; 108 case bitc::VALUE_SYMTAB_BLOCK_ID: return "VALUE_SYMTAB"; 109 case bitc::METADATA_BLOCK_ID: return "METADATA_BLOCK"; 110 case bitc::METADATA_ATTACHMENT_ID: return "METADATA_ATTACHMENT_BLOCK"; 111 case bitc::USELIST_BLOCK_ID: return "USELIST_BLOCK_ID"; 112 } 113 } 114 115 /// GetCodeName - Return a symbolic code name if known, otherwise return 116 /// null. 117 static const char *GetCodeName(unsigned CodeID, unsigned BlockID, 118 const BitstreamReader &StreamFile) { 119 // Standard blocks for all bitcode files. 120 if (BlockID < bitc::FIRST_APPLICATION_BLOCKID) { 121 if (BlockID == bitc::BLOCKINFO_BLOCK_ID) { 122 switch (CodeID) { 123 default: return nullptr; 124 case bitc::BLOCKINFO_CODE_SETBID: return "SETBID"; 125 case bitc::BLOCKINFO_CODE_BLOCKNAME: return "BLOCKNAME"; 126 case bitc::BLOCKINFO_CODE_SETRECORDNAME: return "SETRECORDNAME"; 127 } 128 } 129 return nullptr; 130 } 131 132 // Check to see if we have a blockinfo record for this record, with a name. 133 if (const BitstreamReader::BlockInfo *Info = 134 StreamFile.getBlockInfo(BlockID)) { 135 for (unsigned i = 0, e = Info->RecordNames.size(); i != e; ++i) 136 if (Info->RecordNames[i].first == CodeID) 137 return Info->RecordNames[i].second.c_str(); 138 } 139 140 141 if (CurStreamType != LLVMIRBitstream) return nullptr; 142 143 switch (BlockID) { 144 default: return nullptr; 145 case bitc::MODULE_BLOCK_ID: 146 switch (CodeID) { 147 default: return nullptr; 148 case bitc::MODULE_CODE_VERSION: return "VERSION"; 149 case bitc::MODULE_CODE_TRIPLE: return "TRIPLE"; 150 case bitc::MODULE_CODE_DATALAYOUT: return "DATALAYOUT"; 151 case bitc::MODULE_CODE_ASM: return "ASM"; 152 case bitc::MODULE_CODE_SECTIONNAME: return "SECTIONNAME"; 153 case bitc::MODULE_CODE_DEPLIB: return "DEPLIB"; // FIXME: Remove in 4.0 154 case bitc::MODULE_CODE_GLOBALVAR: return "GLOBALVAR"; 155 case bitc::MODULE_CODE_FUNCTION: return "FUNCTION"; 156 case bitc::MODULE_CODE_ALIAS: return "ALIAS"; 157 case bitc::MODULE_CODE_PURGEVALS: return "PURGEVALS"; 158 case bitc::MODULE_CODE_GCNAME: return "GCNAME"; 159 } 160 case bitc::PARAMATTR_BLOCK_ID: 161 switch (CodeID) { 162 default: return nullptr; 163 case bitc::PARAMATTR_CODE_ENTRY_OLD: return "ENTRY"; 164 case bitc::PARAMATTR_CODE_ENTRY: return "ENTRY"; 165 case bitc::PARAMATTR_GRP_CODE_ENTRY: return "ENTRY"; 166 } 167 case bitc::TYPE_BLOCK_ID_NEW: 168 switch (CodeID) { 169 default: return nullptr; 170 case bitc::TYPE_CODE_NUMENTRY: return "NUMENTRY"; 171 case bitc::TYPE_CODE_VOID: return "VOID"; 172 case bitc::TYPE_CODE_FLOAT: return "FLOAT"; 173 case bitc::TYPE_CODE_DOUBLE: return "DOUBLE"; 174 case bitc::TYPE_CODE_LABEL: return "LABEL"; 175 case bitc::TYPE_CODE_OPAQUE: return "OPAQUE"; 176 case bitc::TYPE_CODE_INTEGER: return "INTEGER"; 177 case bitc::TYPE_CODE_POINTER: return "POINTER"; 178 case bitc::TYPE_CODE_ARRAY: return "ARRAY"; 179 case bitc::TYPE_CODE_VECTOR: return "VECTOR"; 180 case bitc::TYPE_CODE_X86_FP80: return "X86_FP80"; 181 case bitc::TYPE_CODE_FP128: return "FP128"; 182 case bitc::TYPE_CODE_PPC_FP128: return "PPC_FP128"; 183 case bitc::TYPE_CODE_METADATA: return "METADATA"; 184 case bitc::TYPE_CODE_STRUCT_ANON: return "STRUCT_ANON"; 185 case bitc::TYPE_CODE_STRUCT_NAME: return "STRUCT_NAME"; 186 case bitc::TYPE_CODE_STRUCT_NAMED: return "STRUCT_NAMED"; 187 case bitc::TYPE_CODE_FUNCTION: return "FUNCTION"; 188 } 189 190 case bitc::CONSTANTS_BLOCK_ID: 191 switch (CodeID) { 192 default: return nullptr; 193 case bitc::CST_CODE_SETTYPE: return "SETTYPE"; 194 case bitc::CST_CODE_NULL: return "NULL"; 195 case bitc::CST_CODE_UNDEF: return "UNDEF"; 196 case bitc::CST_CODE_INTEGER: return "INTEGER"; 197 case bitc::CST_CODE_WIDE_INTEGER: return "WIDE_INTEGER"; 198 case bitc::CST_CODE_FLOAT: return "FLOAT"; 199 case bitc::CST_CODE_AGGREGATE: return "AGGREGATE"; 200 case bitc::CST_CODE_STRING: return "STRING"; 201 case bitc::CST_CODE_CSTRING: return "CSTRING"; 202 case bitc::CST_CODE_CE_BINOP: return "CE_BINOP"; 203 case bitc::CST_CODE_CE_CAST: return "CE_CAST"; 204 case bitc::CST_CODE_CE_GEP: return "CE_GEP"; 205 case bitc::CST_CODE_CE_INBOUNDS_GEP: return "CE_INBOUNDS_GEP"; 206 case bitc::CST_CODE_CE_SELECT: return "CE_SELECT"; 207 case bitc::CST_CODE_CE_EXTRACTELT: return "CE_EXTRACTELT"; 208 case bitc::CST_CODE_CE_INSERTELT: return "CE_INSERTELT"; 209 case bitc::CST_CODE_CE_SHUFFLEVEC: return "CE_SHUFFLEVEC"; 210 case bitc::CST_CODE_CE_CMP: return "CE_CMP"; 211 case bitc::CST_CODE_INLINEASM: return "INLINEASM"; 212 case bitc::CST_CODE_CE_SHUFVEC_EX: return "CE_SHUFVEC_EX"; 213 case bitc::CST_CODE_BLOCKADDRESS: return "CST_CODE_BLOCKADDRESS"; 214 case bitc::CST_CODE_DATA: return "DATA"; 215 } 216 case bitc::FUNCTION_BLOCK_ID: 217 switch (CodeID) { 218 default: return nullptr; 219 case bitc::FUNC_CODE_DECLAREBLOCKS: return "DECLAREBLOCKS"; 220 221 case bitc::FUNC_CODE_INST_BINOP: return "INST_BINOP"; 222 case bitc::FUNC_CODE_INST_CAST: return "INST_CAST"; 223 case bitc::FUNC_CODE_INST_GEP: return "INST_GEP"; 224 case bitc::FUNC_CODE_INST_INBOUNDS_GEP: return "INST_INBOUNDS_GEP"; 225 case bitc::FUNC_CODE_INST_SELECT: return "INST_SELECT"; 226 case bitc::FUNC_CODE_INST_EXTRACTELT: return "INST_EXTRACTELT"; 227 case bitc::FUNC_CODE_INST_INSERTELT: return "INST_INSERTELT"; 228 case bitc::FUNC_CODE_INST_SHUFFLEVEC: return "INST_SHUFFLEVEC"; 229 case bitc::FUNC_CODE_INST_CMP: return "INST_CMP"; 230 231 case bitc::FUNC_CODE_INST_RET: return "INST_RET"; 232 case bitc::FUNC_CODE_INST_BR: return "INST_BR"; 233 case bitc::FUNC_CODE_INST_SWITCH: return "INST_SWITCH"; 234 case bitc::FUNC_CODE_INST_INVOKE: return "INST_INVOKE"; 235 case bitc::FUNC_CODE_INST_UNREACHABLE: return "INST_UNREACHABLE"; 236 237 case bitc::FUNC_CODE_INST_PHI: return "INST_PHI"; 238 case bitc::FUNC_CODE_INST_ALLOCA: return "INST_ALLOCA"; 239 case bitc::FUNC_CODE_INST_LOAD: return "INST_LOAD"; 240 case bitc::FUNC_CODE_INST_VAARG: return "INST_VAARG"; 241 case bitc::FUNC_CODE_INST_STORE: return "INST_STORE"; 242 case bitc::FUNC_CODE_INST_EXTRACTVAL: return "INST_EXTRACTVAL"; 243 case bitc::FUNC_CODE_INST_INSERTVAL: return "INST_INSERTVAL"; 244 case bitc::FUNC_CODE_INST_CMP2: return "INST_CMP2"; 245 case bitc::FUNC_CODE_INST_VSELECT: return "INST_VSELECT"; 246 case bitc::FUNC_CODE_DEBUG_LOC_AGAIN: return "DEBUG_LOC_AGAIN"; 247 case bitc::FUNC_CODE_INST_CALL: return "INST_CALL"; 248 case bitc::FUNC_CODE_DEBUG_LOC: return "DEBUG_LOC"; 249 } 250 case bitc::VALUE_SYMTAB_BLOCK_ID: 251 switch (CodeID) { 252 default: return nullptr; 253 case bitc::VST_CODE_ENTRY: return "ENTRY"; 254 case bitc::VST_CODE_BBENTRY: return "BBENTRY"; 255 } 256 case bitc::METADATA_ATTACHMENT_ID: 257 switch(CodeID) { 258 default:return nullptr; 259 case bitc::METADATA_ATTACHMENT: return "METADATA_ATTACHMENT"; 260 } 261 case bitc::METADATA_BLOCK_ID: 262 switch(CodeID) { 263 default:return nullptr; 264 case bitc::METADATA_STRING: return "METADATA_STRING"; 265 case bitc::METADATA_NAME: return "METADATA_NAME"; 266 case bitc::METADATA_KIND: return "METADATA_KIND"; 267 case bitc::METADATA_NODE: return "METADATA_NODE"; 268 case bitc::METADATA_FN_NODE: return "METADATA_FN_NODE"; 269 case bitc::METADATA_NAMED_NODE: return "METADATA_NAMED_NODE"; 270 } 271 case bitc::USELIST_BLOCK_ID: 272 switch(CodeID) { 273 default:return nullptr; 274 case bitc::USELIST_CODE_ENTRY: return "USELIST_CODE_ENTRY"; 275 } 276 } 277 } 278 279 struct PerRecordStats { 280 unsigned NumInstances; 281 unsigned NumAbbrev; 282 uint64_t TotalBits; 283 284 PerRecordStats() : NumInstances(0), NumAbbrev(0), TotalBits(0) {} 285 }; 286 287 struct PerBlockIDStats { 288 /// NumInstances - This the number of times this block ID has been seen. 289 unsigned NumInstances; 290 291 /// NumBits - The total size in bits of all of these blocks. 292 uint64_t NumBits; 293 294 /// NumSubBlocks - The total number of blocks these blocks contain. 295 unsigned NumSubBlocks; 296 297 /// NumAbbrevs - The total number of abbreviations. 298 unsigned NumAbbrevs; 299 300 /// NumRecords - The total number of records these blocks contain, and the 301 /// number that are abbreviated. 302 unsigned NumRecords, NumAbbreviatedRecords; 303 304 /// CodeFreq - Keep track of the number of times we see each code. 305 std::vector<PerRecordStats> CodeFreq; 306 307 PerBlockIDStats() 308 : NumInstances(0), NumBits(0), 309 NumSubBlocks(0), NumAbbrevs(0), NumRecords(0), NumAbbreviatedRecords(0) {} 310 }; 311 312 static std::map<unsigned, PerBlockIDStats> BlockIDStats; 313 314 315 316 /// Error - All bitcode analysis errors go through this function, making this a 317 /// good place to breakpoint if debugging. 318 static bool Error(const std::string &Err) { 319 errs() << Err << "\n"; 320 return true; 321 } 322 323 /// ParseBlock - Read a block, updating statistics, etc. 324 static bool ParseBlock(BitstreamCursor &Stream, unsigned BlockID, 325 unsigned IndentLevel) { 326 std::string Indent(IndentLevel*2, ' '); 327 uint64_t BlockBitStart = Stream.GetCurrentBitNo(); 328 329 // Get the statistics for this BlockID. 330 PerBlockIDStats &BlockStats = BlockIDStats[BlockID]; 331 332 BlockStats.NumInstances++; 333 334 // BLOCKINFO is a special part of the stream. 335 if (BlockID == bitc::BLOCKINFO_BLOCK_ID) { 336 if (Dump) outs() << Indent << "<BLOCKINFO_BLOCK/>\n"; 337 if (Stream.ReadBlockInfoBlock()) 338 return Error("Malformed BlockInfoBlock"); 339 uint64_t BlockBitEnd = Stream.GetCurrentBitNo(); 340 BlockStats.NumBits += BlockBitEnd-BlockBitStart; 341 return false; 342 } 343 344 unsigned NumWords = 0; 345 if (Stream.EnterSubBlock(BlockID, &NumWords)) 346 return Error("Malformed block record"); 347 348 const char *BlockName = nullptr; 349 if (Dump) { 350 outs() << Indent << "<"; 351 if ((BlockName = GetBlockName(BlockID, *Stream.getBitStreamReader()))) 352 outs() << BlockName; 353 else 354 outs() << "UnknownBlock" << BlockID; 355 356 if (NonSymbolic && BlockName) 357 outs() << " BlockID=" << BlockID; 358 359 outs() << " NumWords=" << NumWords 360 << " BlockCodeSize=" << Stream.getAbbrevIDWidth() << ">\n"; 361 } 362 363 SmallVector<uint64_t, 64> Record; 364 365 // Read all the records for this block. 366 while (1) { 367 if (Stream.AtEndOfStream()) 368 return Error("Premature end of bitstream"); 369 370 uint64_t RecordStartBit = Stream.GetCurrentBitNo(); 371 372 BitstreamEntry Entry = 373 Stream.advance(BitstreamCursor::AF_DontAutoprocessAbbrevs); 374 375 switch (Entry.Kind) { 376 case BitstreamEntry::Error: 377 return Error("malformed bitcode file"); 378 case BitstreamEntry::EndBlock: { 379 uint64_t BlockBitEnd = Stream.GetCurrentBitNo(); 380 BlockStats.NumBits += BlockBitEnd-BlockBitStart; 381 if (Dump) { 382 outs() << Indent << "</"; 383 if (BlockName) 384 outs() << BlockName << ">\n"; 385 else 386 outs() << "UnknownBlock" << BlockID << ">\n"; 387 } 388 return false; 389 } 390 391 case BitstreamEntry::SubBlock: { 392 uint64_t SubBlockBitStart = Stream.GetCurrentBitNo(); 393 if (ParseBlock(Stream, Entry.ID, IndentLevel+1)) 394 return true; 395 ++BlockStats.NumSubBlocks; 396 uint64_t SubBlockBitEnd = Stream.GetCurrentBitNo(); 397 398 // Don't include subblock sizes in the size of this block. 399 BlockBitStart += SubBlockBitEnd-SubBlockBitStart; 400 continue; 401 } 402 case BitstreamEntry::Record: 403 // The interesting case. 404 break; 405 } 406 407 if (Entry.ID == bitc::DEFINE_ABBREV) { 408 Stream.ReadAbbrevRecord(); 409 ++BlockStats.NumAbbrevs; 410 continue; 411 } 412 413 Record.clear(); 414 415 ++BlockStats.NumRecords; 416 417 StringRef Blob; 418 unsigned Code = Stream.readRecord(Entry.ID, Record, &Blob); 419 420 // Increment the # occurrences of this code. 421 if (BlockStats.CodeFreq.size() <= Code) 422 BlockStats.CodeFreq.resize(Code+1); 423 BlockStats.CodeFreq[Code].NumInstances++; 424 BlockStats.CodeFreq[Code].TotalBits += 425 Stream.GetCurrentBitNo()-RecordStartBit; 426 if (Entry.ID != bitc::UNABBREV_RECORD) { 427 BlockStats.CodeFreq[Code].NumAbbrev++; 428 ++BlockStats.NumAbbreviatedRecords; 429 } 430 431 if (Dump) { 432 outs() << Indent << " <"; 433 if (const char *CodeName = 434 GetCodeName(Code, BlockID, *Stream.getBitStreamReader())) 435 outs() << CodeName; 436 else 437 outs() << "UnknownCode" << Code; 438 if (NonSymbolic && 439 GetCodeName(Code, BlockID, *Stream.getBitStreamReader())) 440 outs() << " codeid=" << Code; 441 if (Entry.ID != bitc::UNABBREV_RECORD) 442 outs() << " abbrevid=" << Entry.ID; 443 444 for (unsigned i = 0, e = Record.size(); i != e; ++i) 445 outs() << " op" << i << "=" << (int64_t)Record[i]; 446 447 outs() << "/>"; 448 449 if (Blob.data()) { 450 outs() << " blob data = "; 451 bool BlobIsPrintable = true; 452 for (unsigned i = 0, e = Blob.size(); i != e; ++i) 453 if (!isprint(static_cast<unsigned char>(Blob[i]))) { 454 BlobIsPrintable = false; 455 break; 456 } 457 458 if (BlobIsPrintable) 459 outs() << "'" << Blob << "'"; 460 else 461 outs() << "unprintable, " << Blob.size() << " bytes."; 462 } 463 464 outs() << "\n"; 465 } 466 } 467 } 468 469 static void PrintSize(double Bits) { 470 outs() << format("%.2f/%.2fB/%luW", Bits, Bits/8,(unsigned long)(Bits/32)); 471 } 472 static void PrintSize(uint64_t Bits) { 473 outs() << format("%lub/%.2fB/%luW", (unsigned long)Bits, 474 (double)Bits/8, (unsigned long)(Bits/32)); 475 } 476 477 478 /// AnalyzeBitcode - Analyze the bitcode file specified by InputFilename. 479 static int AnalyzeBitcode() { 480 // Read the input file. 481 ErrorOr<std::unique_ptr<MemoryBuffer>> MemBufOrErr = 482 MemoryBuffer::getFileOrSTDIN(InputFilename); 483 if (std::error_code EC = MemBufOrErr.getError()) 484 return Error("Error reading '" + InputFilename + "': " + EC.message()); 485 std::unique_ptr<MemoryBuffer> MemBuf = std::move(MemBufOrErr.get()); 486 487 if (MemBuf->getBufferSize() & 3) 488 return Error("Bitcode stream should be a multiple of 4 bytes in length"); 489 490 const unsigned char *BufPtr = (const unsigned char *)MemBuf->getBufferStart(); 491 const unsigned char *EndBufPtr = BufPtr+MemBuf->getBufferSize(); 492 493 // If we have a wrapper header, parse it and ignore the non-bc file contents. 494 // The magic number is 0x0B17C0DE stored in little endian. 495 if (isBitcodeWrapper(BufPtr, EndBufPtr)) 496 if (SkipBitcodeWrapperHeader(BufPtr, EndBufPtr, true)) 497 return Error("Invalid bitcode wrapper header"); 498 499 BitstreamReader StreamFile(BufPtr, EndBufPtr); 500 BitstreamCursor Stream(StreamFile); 501 StreamFile.CollectBlockInfoNames(); 502 503 // Read the stream signature. 504 char Signature[6]; 505 Signature[0] = Stream.Read(8); 506 Signature[1] = Stream.Read(8); 507 Signature[2] = Stream.Read(4); 508 Signature[3] = Stream.Read(4); 509 Signature[4] = Stream.Read(4); 510 Signature[5] = Stream.Read(4); 511 512 // Autodetect the file contents, if it is one we know. 513 CurStreamType = UnknownBitstream; 514 if (Signature[0] == 'B' && Signature[1] == 'C' && 515 Signature[2] == 0x0 && Signature[3] == 0xC && 516 Signature[4] == 0xE && Signature[5] == 0xD) 517 CurStreamType = LLVMIRBitstream; 518 519 unsigned NumTopBlocks = 0; 520 521 // Parse the top-level structure. We only allow blocks at the top-level. 522 while (!Stream.AtEndOfStream()) { 523 unsigned Code = Stream.ReadCode(); 524 if (Code != bitc::ENTER_SUBBLOCK) 525 return Error("Invalid record at top-level"); 526 527 unsigned BlockID = Stream.ReadSubBlockID(); 528 529 if (ParseBlock(Stream, BlockID, 0)) 530 return true; 531 ++NumTopBlocks; 532 } 533 534 if (Dump) outs() << "\n\n"; 535 536 uint64_t BufferSizeBits = (EndBufPtr-BufPtr)*CHAR_BIT; 537 // Print a summary of the read file. 538 outs() << "Summary of " << InputFilename << ":\n"; 539 outs() << " Total size: "; 540 PrintSize(BufferSizeBits); 541 outs() << "\n"; 542 outs() << " Stream type: "; 543 switch (CurStreamType) { 544 case UnknownBitstream: outs() << "unknown\n"; break; 545 case LLVMIRBitstream: outs() << "LLVM IR\n"; break; 546 } 547 outs() << " # Toplevel Blocks: " << NumTopBlocks << "\n"; 548 outs() << "\n"; 549 550 // Emit per-block stats. 551 outs() << "Per-block Summary:\n"; 552 for (std::map<unsigned, PerBlockIDStats>::iterator I = BlockIDStats.begin(), 553 E = BlockIDStats.end(); I != E; ++I) { 554 outs() << " Block ID #" << I->first; 555 if (const char *BlockName = GetBlockName(I->first, StreamFile)) 556 outs() << " (" << BlockName << ")"; 557 outs() << ":\n"; 558 559 const PerBlockIDStats &Stats = I->second; 560 outs() << " Num Instances: " << Stats.NumInstances << "\n"; 561 outs() << " Total Size: "; 562 PrintSize(Stats.NumBits); 563 outs() << "\n"; 564 double pct = (Stats.NumBits * 100.0) / BufferSizeBits; 565 outs() << " Percent of file: " << format("%2.4f%%", pct) << "\n"; 566 if (Stats.NumInstances > 1) { 567 outs() << " Average Size: "; 568 PrintSize(Stats.NumBits/(double)Stats.NumInstances); 569 outs() << "\n"; 570 outs() << " Tot/Avg SubBlocks: " << Stats.NumSubBlocks << "/" 571 << Stats.NumSubBlocks/(double)Stats.NumInstances << "\n"; 572 outs() << " Tot/Avg Abbrevs: " << Stats.NumAbbrevs << "/" 573 << Stats.NumAbbrevs/(double)Stats.NumInstances << "\n"; 574 outs() << " Tot/Avg Records: " << Stats.NumRecords << "/" 575 << Stats.NumRecords/(double)Stats.NumInstances << "\n"; 576 } else { 577 outs() << " Num SubBlocks: " << Stats.NumSubBlocks << "\n"; 578 outs() << " Num Abbrevs: " << Stats.NumAbbrevs << "\n"; 579 outs() << " Num Records: " << Stats.NumRecords << "\n"; 580 } 581 if (Stats.NumRecords) { 582 double pct = (Stats.NumAbbreviatedRecords * 100.0) / Stats.NumRecords; 583 outs() << " Percent Abbrevs: " << format("%2.4f%%", pct) << "\n"; 584 } 585 outs() << "\n"; 586 587 // Print a histogram of the codes we see. 588 if (!NoHistogram && !Stats.CodeFreq.empty()) { 589 std::vector<std::pair<unsigned, unsigned> > FreqPairs; // <freq,code> 590 for (unsigned i = 0, e = Stats.CodeFreq.size(); i != e; ++i) 591 if (unsigned Freq = Stats.CodeFreq[i].NumInstances) 592 FreqPairs.push_back(std::make_pair(Freq, i)); 593 std::stable_sort(FreqPairs.begin(), FreqPairs.end()); 594 std::reverse(FreqPairs.begin(), FreqPairs.end()); 595 596 outs() << "\tRecord Histogram:\n"; 597 outs() << "\t\t Count # Bits %% Abv Record Kind\n"; 598 for (unsigned i = 0, e = FreqPairs.size(); i != e; ++i) { 599 const PerRecordStats &RecStats = Stats.CodeFreq[FreqPairs[i].second]; 600 601 outs() << format("\t\t%7d %9lu", 602 RecStats.NumInstances, 603 (unsigned long)RecStats.TotalBits); 604 605 if (RecStats.NumAbbrev) 606 outs() << 607 format("%7.2f ", 608 (double)RecStats.NumAbbrev/RecStats.NumInstances*100); 609 else 610 outs() << " "; 611 612 if (const char *CodeName = 613 GetCodeName(FreqPairs[i].second, I->first, StreamFile)) 614 outs() << CodeName << "\n"; 615 else 616 outs() << "UnknownCode" << FreqPairs[i].second << "\n"; 617 } 618 outs() << "\n"; 619 620 } 621 } 622 return 0; 623 } 624 625 626 int main(int argc, char **argv) { 627 // Print a stack trace if we signal out. 628 sys::PrintStackTraceOnErrorSignal(); 629 PrettyStackTraceProgram X(argc, argv); 630 llvm_shutdown_obj Y; // Call llvm_shutdown() on exit. 631 cl::ParseCommandLineOptions(argc, argv, "llvm-bcanalyzer file analyzer\n"); 632 633 return AnalyzeBitcode(); 634 } 635
