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/ADT/OwningPtr.h" 31 #include "llvm/Analysis/Verifier.h" 32 #include "llvm/Bitcode/BitstreamReader.h" 33 #include "llvm/Bitcode/LLVMBitCodes.h" 34 #include "llvm/Bitcode/ReaderWriter.h" 35 #include "llvm/Support/CommandLine.h" 36 #include "llvm/Support/Format.h" 37 #include "llvm/Support/ManagedStatic.h" 38 #include "llvm/Support/MemoryBuffer.h" 39 #include "llvm/Support/PrettyStackTrace.h" 40 #include "llvm/Support/raw_ostream.h" 41 #include "llvm/Support/Signals.h" 42 #include "llvm/Support/system_error.h" 43 #include <cstdio> 44 #include <map> 45 #include <algorithm> 46 using namespace llvm; 47 48 static cl::opt<std::string> 49 InputFilename(cl::Positional, cl::desc("<input bitcode>"), cl::init("-")); 50 51 static cl::opt<bool> Dump("dump", cl::desc("Dump low level bitcode trace")); 52 53 //===----------------------------------------------------------------------===// 54 // Bitcode specific analysis. 55 //===----------------------------------------------------------------------===// 56 57 static cl::opt<bool> NoHistogram("disable-histogram", 58 cl::desc("Do not print per-code histogram")); 59 60 static cl::opt<bool> 61 NonSymbolic("non-symbolic", 62 cl::desc("Emit numeric info in dump even if" 63 " symbolic info is available")); 64 65 namespace { 66 67 /// CurStreamTypeType - A type for CurStreamType 68 enum CurStreamTypeType { 69 UnknownBitstream, 70 LLVMIRBitstream 71 }; 72 73 } 74 75 /// CurStreamType - If we can sniff the flavor of this stream, we can produce 76 /// better dump info. 77 static CurStreamTypeType CurStreamType; 78 79 80 /// GetBlockName - Return a symbolic block name if known, otherwise return 81 /// null. 82 static const char *GetBlockName(unsigned BlockID, 83 const BitstreamReader &StreamFile) { 84 // Standard blocks for all bitcode files. 85 if (BlockID < bitc::FIRST_APPLICATION_BLOCKID) { 86 if (BlockID == bitc::BLOCKINFO_BLOCK_ID) 87 return "BLOCKINFO_BLOCK"; 88 return 0; 89 } 90 91 // Check to see if we have a blockinfo record for this block, with a name. 92 if (const BitstreamReader::BlockInfo *Info = 93 StreamFile.getBlockInfo(BlockID)) { 94 if (!Info->Name.empty()) 95 return Info->Name.c_str(); 96 } 97 98 99 if (CurStreamType != LLVMIRBitstream) return 0; 100 101 switch (BlockID) { 102 default: return 0; 103 case bitc::MODULE_BLOCK_ID: return "MODULE_BLOCK"; 104 case bitc::PARAMATTR_BLOCK_ID: return "PARAMATTR_BLOCK"; 105 case bitc::TYPE_BLOCK_ID_OLD: return "TYPE_BLOCK_ID_OLD"; 106 case bitc::TYPE_BLOCK_ID_NEW: return "TYPE_BLOCK_ID"; 107 case bitc::CONSTANTS_BLOCK_ID: return "CONSTANTS_BLOCK"; 108 case bitc::FUNCTION_BLOCK_ID: return "FUNCTION_BLOCK"; 109 case bitc::TYPE_SYMTAB_BLOCK_ID_OLD: return "TYPE_SYMTAB_OLD"; 110 case bitc::VALUE_SYMTAB_BLOCK_ID: return "VALUE_SYMTAB"; 111 case bitc::METADATA_BLOCK_ID: return "METADATA_BLOCK"; 112 case bitc::METADATA_ATTACHMENT_ID: return "METADATA_ATTACHMENT_BLOCK"; 113 } 114 } 115 116 /// GetCodeName - Return a symbolic code name if known, otherwise return 117 /// null. 118 static const char *GetCodeName(unsigned CodeID, unsigned BlockID, 119 const BitstreamReader &StreamFile) { 120 // Standard blocks for all bitcode files. 121 if (BlockID < bitc::FIRST_APPLICATION_BLOCKID) { 122 if (BlockID == bitc::BLOCKINFO_BLOCK_ID) { 123 switch (CodeID) { 124 default: return 0; 125 case bitc::BLOCKINFO_CODE_SETBID: return "SETBID"; 126 case bitc::BLOCKINFO_CODE_BLOCKNAME: return "BLOCKNAME"; 127 case bitc::BLOCKINFO_CODE_SETRECORDNAME: return "SETRECORDNAME"; 128 } 129 } 130 return 0; 131 } 132 133 // Check to see if we have a blockinfo record for this record, with a name. 134 if (const BitstreamReader::BlockInfo *Info = 135 StreamFile.getBlockInfo(BlockID)) { 136 for (unsigned i = 0, e = Info->RecordNames.size(); i != e; ++i) 137 if (Info->RecordNames[i].first == CodeID) 138 return Info->RecordNames[i].second.c_str(); 139 } 140 141 142 if (CurStreamType != LLVMIRBitstream) return 0; 143 144 switch (BlockID) { 145 default: return 0; 146 case bitc::MODULE_BLOCK_ID: 147 switch (CodeID) { 148 default: return 0; 149 case bitc::MODULE_CODE_VERSION: return "VERSION"; 150 case bitc::MODULE_CODE_TRIPLE: return "TRIPLE"; 151 case bitc::MODULE_CODE_DATALAYOUT: return "DATALAYOUT"; 152 case bitc::MODULE_CODE_ASM: return "ASM"; 153 case bitc::MODULE_CODE_SECTIONNAME: return "SECTIONNAME"; 154 case bitc::MODULE_CODE_DEPLIB: return "DEPLIB"; 155 case bitc::MODULE_CODE_GLOBALVAR: return "GLOBALVAR"; 156 case bitc::MODULE_CODE_FUNCTION: return "FUNCTION"; 157 case bitc::MODULE_CODE_ALIAS: return "ALIAS"; 158 case bitc::MODULE_CODE_PURGEVALS: return "PURGEVALS"; 159 case bitc::MODULE_CODE_GCNAME: return "GCNAME"; 160 } 161 case bitc::PARAMATTR_BLOCK_ID: 162 switch (CodeID) { 163 default: return 0; 164 case bitc::PARAMATTR_CODE_ENTRY: return "ENTRY"; 165 } 166 case bitc::TYPE_BLOCK_ID_OLD: 167 case bitc::TYPE_BLOCK_ID_NEW: 168 switch (CodeID) { 169 default: return 0; 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_FUNCTION: return "FUNCTION"; 179 case bitc::TYPE_CODE_STRUCT_OLD: return "STRUCT_OLD"; 180 case bitc::TYPE_CODE_ARRAY: return "ARRAY"; 181 case bitc::TYPE_CODE_VECTOR: return "VECTOR"; 182 case bitc::TYPE_CODE_X86_FP80: return "X86_FP80"; 183 case bitc::TYPE_CODE_FP128: return "FP128"; 184 case bitc::TYPE_CODE_PPC_FP128: return "PPC_FP128"; 185 case bitc::TYPE_CODE_METADATA: return "METADATA"; 186 case bitc::TYPE_CODE_STRUCT_ANON: return "STRUCT_ANON"; 187 case bitc::TYPE_CODE_STRUCT_NAME: return "STRUCT_NAME"; 188 case bitc::TYPE_CODE_STRUCT_NAMED: return "STRUCT_NAMED"; 189 } 190 191 case bitc::CONSTANTS_BLOCK_ID: 192 switch (CodeID) { 193 default: return 0; 194 case bitc::CST_CODE_SETTYPE: return "SETTYPE"; 195 case bitc::CST_CODE_NULL: return "NULL"; 196 case bitc::CST_CODE_UNDEF: return "UNDEF"; 197 case bitc::CST_CODE_INTEGER: return "INTEGER"; 198 case bitc::CST_CODE_WIDE_INTEGER: return "WIDE_INTEGER"; 199 case bitc::CST_CODE_FLOAT: return "FLOAT"; 200 case bitc::CST_CODE_AGGREGATE: return "AGGREGATE"; 201 case bitc::CST_CODE_STRING: return "STRING"; 202 case bitc::CST_CODE_CSTRING: return "CSTRING"; 203 case bitc::CST_CODE_CE_BINOP: return "CE_BINOP"; 204 case bitc::CST_CODE_CE_CAST: return "CE_CAST"; 205 case bitc::CST_CODE_CE_GEP: return "CE_GEP"; 206 case bitc::CST_CODE_CE_INBOUNDS_GEP: return "CE_INBOUNDS_GEP"; 207 case bitc::CST_CODE_CE_SELECT: return "CE_SELECT"; 208 case bitc::CST_CODE_CE_EXTRACTELT: return "CE_EXTRACTELT"; 209 case bitc::CST_CODE_CE_INSERTELT: return "CE_INSERTELT"; 210 case bitc::CST_CODE_CE_SHUFFLEVEC: return "CE_SHUFFLEVEC"; 211 case bitc::CST_CODE_CE_CMP: return "CE_CMP"; 212 case bitc::CST_CODE_INLINEASM: return "INLINEASM"; 213 case bitc::CST_CODE_CE_SHUFVEC_EX: return "CE_SHUFVEC_EX"; 214 } 215 case bitc::FUNCTION_BLOCK_ID: 216 switch (CodeID) { 217 default: return 0; 218 case bitc::FUNC_CODE_DECLAREBLOCKS: return "DECLAREBLOCKS"; 219 220 case bitc::FUNC_CODE_INST_BINOP: return "INST_BINOP"; 221 case bitc::FUNC_CODE_INST_CAST: return "INST_CAST"; 222 case bitc::FUNC_CODE_INST_GEP: return "INST_GEP"; 223 case bitc::FUNC_CODE_INST_INBOUNDS_GEP: return "INST_INBOUNDS_GEP"; 224 case bitc::FUNC_CODE_INST_SELECT: return "INST_SELECT"; 225 case bitc::FUNC_CODE_INST_EXTRACTELT: return "INST_EXTRACTELT"; 226 case bitc::FUNC_CODE_INST_INSERTELT: return "INST_INSERTELT"; 227 case bitc::FUNC_CODE_INST_SHUFFLEVEC: return "INST_SHUFFLEVEC"; 228 case bitc::FUNC_CODE_INST_CMP: return "INST_CMP"; 229 230 case bitc::FUNC_CODE_INST_RET: return "INST_RET"; 231 case bitc::FUNC_CODE_INST_BR: return "INST_BR"; 232 case bitc::FUNC_CODE_INST_SWITCH: return "INST_SWITCH"; 233 case bitc::FUNC_CODE_INST_INVOKE: return "INST_INVOKE"; 234 case bitc::FUNC_CODE_INST_UNWIND: return "INST_UNWIND"; 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::TYPE_SYMTAB_BLOCK_ID_OLD: 251 switch (CodeID) { 252 default: return 0; 253 case bitc::TST_CODE_ENTRY: return "ENTRY"; 254 } 255 case bitc::VALUE_SYMTAB_BLOCK_ID: 256 switch (CodeID) { 257 default: return 0; 258 case bitc::VST_CODE_ENTRY: return "ENTRY"; 259 case bitc::VST_CODE_BBENTRY: return "BBENTRY"; 260 } 261 case bitc::METADATA_ATTACHMENT_ID: 262 switch(CodeID) { 263 default:return 0; 264 case bitc::METADATA_ATTACHMENT: return "METADATA_ATTACHMENT"; 265 } 266 case bitc::METADATA_BLOCK_ID: 267 switch(CodeID) { 268 default:return 0; 269 case bitc::METADATA_STRING: return "METADATA_STRING"; 270 case bitc::METADATA_NAME: return "METADATA_NAME"; 271 case bitc::METADATA_KIND: return "METADATA_KIND"; 272 case bitc::METADATA_NODE: return "METADATA_NODE"; 273 case bitc::METADATA_FN_NODE: return "METADATA_FN_NODE"; 274 case bitc::METADATA_NAMED_NODE: return "METADATA_NAMED_NODE"; 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 IndentLevel) { 325 std::string Indent(IndentLevel*2, ' '); 326 uint64_t BlockBitStart = Stream.GetCurrentBitNo(); 327 unsigned BlockID = Stream.ReadSubBlockID(); 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) errs() << 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 = 0; 349 if (Dump) { 350 errs() << Indent << "<"; 351 if ((BlockName = GetBlockName(BlockID, *Stream.getBitStreamReader()))) 352 errs() << BlockName; 353 else 354 errs() << "UnknownBlock" << BlockID; 355 356 if (NonSymbolic && BlockName) 357 errs() << " BlockID=" << BlockID; 358 359 errs() << " 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 // Read the code for this record. 373 unsigned AbbrevID = Stream.ReadCode(); 374 switch (AbbrevID) { 375 case bitc::END_BLOCK: { 376 if (Stream.ReadBlockEnd()) 377 return Error("Error at end of block"); 378 uint64_t BlockBitEnd = Stream.GetCurrentBitNo(); 379 BlockStats.NumBits += BlockBitEnd-BlockBitStart; 380 if (Dump) { 381 errs() << Indent << "</"; 382 if (BlockName) 383 errs() << BlockName << ">\n"; 384 else 385 errs() << "UnknownBlock" << BlockID << ">\n"; 386 } 387 return false; 388 } 389 case bitc::ENTER_SUBBLOCK: { 390 uint64_t SubBlockBitStart = Stream.GetCurrentBitNo(); 391 if (ParseBlock(Stream, IndentLevel+1)) 392 return true; 393 ++BlockStats.NumSubBlocks; 394 uint64_t SubBlockBitEnd = Stream.GetCurrentBitNo(); 395 396 // Don't include subblock sizes in the size of this block. 397 BlockBitStart += SubBlockBitEnd-SubBlockBitStart; 398 break; 399 } 400 case bitc::DEFINE_ABBREV: 401 Stream.ReadAbbrevRecord(); 402 ++BlockStats.NumAbbrevs; 403 break; 404 default: 405 Record.clear(); 406 407 ++BlockStats.NumRecords; 408 if (AbbrevID != bitc::UNABBREV_RECORD) 409 ++BlockStats.NumAbbreviatedRecords; 410 411 const char *BlobStart = 0; 412 unsigned BlobLen = 0; 413 unsigned Code = Stream.ReadRecord(AbbrevID, Record, BlobStart, BlobLen); 414 415 416 417 // Increment the # occurrences of this code. 418 if (BlockStats.CodeFreq.size() <= Code) 419 BlockStats.CodeFreq.resize(Code+1); 420 BlockStats.CodeFreq[Code].NumInstances++; 421 BlockStats.CodeFreq[Code].TotalBits += 422 Stream.GetCurrentBitNo()-RecordStartBit; 423 if (AbbrevID != bitc::UNABBREV_RECORD) 424 BlockStats.CodeFreq[Code].NumAbbrev++; 425 426 if (Dump) { 427 errs() << Indent << " <"; 428 if (const char *CodeName = 429 GetCodeName(Code, BlockID, *Stream.getBitStreamReader())) 430 errs() << CodeName; 431 else 432 errs() << "UnknownCode" << Code; 433 if (NonSymbolic && 434 GetCodeName(Code, BlockID, *Stream.getBitStreamReader())) 435 errs() << " codeid=" << Code; 436 if (AbbrevID != bitc::UNABBREV_RECORD) 437 errs() << " abbrevid=" << AbbrevID; 438 439 for (unsigned i = 0, e = Record.size(); i != e; ++i) 440 errs() << " op" << i << "=" << (int64_t)Record[i]; 441 442 errs() << "/>"; 443 444 if (BlobStart) { 445 errs() << " blob data = "; 446 bool BlobIsPrintable = true; 447 for (unsigned i = 0; i != BlobLen; ++i) 448 if (!isprint(BlobStart[i])) { 449 BlobIsPrintable = false; 450 break; 451 } 452 453 if (BlobIsPrintable) 454 errs() << "'" << std::string(BlobStart, BlobStart+BlobLen) <<"'"; 455 else 456 errs() << "unprintable, " << BlobLen << " bytes."; 457 } 458 459 errs() << "\n"; 460 } 461 462 break; 463 } 464 } 465 } 466 467 static void PrintSize(double Bits) { 468 fprintf(stderr, "%.2f/%.2fB/%luW", Bits, Bits/8,(unsigned long)(Bits/32)); 469 } 470 static void PrintSize(uint64_t Bits) { 471 fprintf(stderr, "%lub/%.2fB/%luW", (unsigned long)Bits, 472 (double)Bits/8, (unsigned long)(Bits/32)); 473 } 474 475 476 /// AnalyzeBitcode - Analyze the bitcode file specified by InputFilename. 477 static int AnalyzeBitcode() { 478 // Read the input file. 479 OwningPtr<MemoryBuffer> MemBuf; 480 481 if (error_code ec = 482 MemoryBuffer::getFileOrSTDIN(InputFilename.c_str(), MemBuf)) 483 return Error("Error reading '" + InputFilename + "': " + ec.message()); 484 485 if (MemBuf->getBufferSize() & 3) 486 return Error("Bitcode stream should be a multiple of 4 bytes in length"); 487 488 unsigned char *BufPtr = (unsigned char *)MemBuf->getBufferStart(); 489 unsigned char *EndBufPtr = BufPtr+MemBuf->getBufferSize(); 490 491 // If we have a wrapper header, parse it and ignore the non-bc file contents. 492 // The magic number is 0x0B17C0DE stored in little endian. 493 if (isBitcodeWrapper(BufPtr, EndBufPtr)) 494 if (SkipBitcodeWrapperHeader(BufPtr, EndBufPtr)) 495 return Error("Invalid bitcode wrapper header"); 496 497 BitstreamReader StreamFile(BufPtr, EndBufPtr); 498 BitstreamCursor Stream(StreamFile); 499 StreamFile.CollectBlockInfoNames(); 500 501 // Read the stream signature. 502 char Signature[6]; 503 Signature[0] = Stream.Read(8); 504 Signature[1] = Stream.Read(8); 505 Signature[2] = Stream.Read(4); 506 Signature[3] = Stream.Read(4); 507 Signature[4] = Stream.Read(4); 508 Signature[5] = Stream.Read(4); 509 510 // Autodetect the file contents, if it is one we know. 511 CurStreamType = UnknownBitstream; 512 if (Signature[0] == 'B' && Signature[1] == 'C' && 513 Signature[2] == 0x0 && Signature[3] == 0xC && 514 Signature[4] == 0xE && Signature[5] == 0xD) 515 CurStreamType = LLVMIRBitstream; 516 517 unsigned NumTopBlocks = 0; 518 519 // Parse the top-level structure. We only allow blocks at the top-level. 520 while (!Stream.AtEndOfStream()) { 521 unsigned Code = Stream.ReadCode(); 522 if (Code != bitc::ENTER_SUBBLOCK) 523 return Error("Invalid record at top-level"); 524 525 if (ParseBlock(Stream, 0)) 526 return true; 527 ++NumTopBlocks; 528 } 529 530 if (Dump) errs() << "\n\n"; 531 532 uint64_t BufferSizeBits = (EndBufPtr-BufPtr)*CHAR_BIT; 533 // Print a summary of the read file. 534 errs() << "Summary of " << InputFilename << ":\n"; 535 errs() << " Total size: "; 536 PrintSize(BufferSizeBits); 537 errs() << "\n"; 538 errs() << " Stream type: "; 539 switch (CurStreamType) { 540 default: assert(0 && "Unknown bitstream type"); 541 case UnknownBitstream: errs() << "unknown\n"; break; 542 case LLVMIRBitstream: errs() << "LLVM IR\n"; break; 543 } 544 errs() << " # Toplevel Blocks: " << NumTopBlocks << "\n"; 545 errs() << "\n"; 546 547 // Emit per-block stats. 548 errs() << "Per-block Summary:\n"; 549 for (std::map<unsigned, PerBlockIDStats>::iterator I = BlockIDStats.begin(), 550 E = BlockIDStats.end(); I != E; ++I) { 551 errs() << " Block ID #" << I->first; 552 if (const char *BlockName = GetBlockName(I->first, StreamFile)) 553 errs() << " (" << BlockName << ")"; 554 errs() << ":\n"; 555 556 const PerBlockIDStats &Stats = I->second; 557 errs() << " Num Instances: " << Stats.NumInstances << "\n"; 558 errs() << " Total Size: "; 559 PrintSize(Stats.NumBits); 560 errs() << "\n"; 561 double pct = (Stats.NumBits * 100.0) / BufferSizeBits; 562 errs() << " Percent of file: " << format("%2.4f%%", pct) << "\n"; 563 if (Stats.NumInstances > 1) { 564 errs() << " Average Size: "; 565 PrintSize(Stats.NumBits/(double)Stats.NumInstances); 566 errs() << "\n"; 567 errs() << " Tot/Avg SubBlocks: " << Stats.NumSubBlocks << "/" 568 << Stats.NumSubBlocks/(double)Stats.NumInstances << "\n"; 569 errs() << " Tot/Avg Abbrevs: " << Stats.NumAbbrevs << "/" 570 << Stats.NumAbbrevs/(double)Stats.NumInstances << "\n"; 571 errs() << " Tot/Avg Records: " << Stats.NumRecords << "/" 572 << Stats.NumRecords/(double)Stats.NumInstances << "\n"; 573 } else { 574 errs() << " Num SubBlocks: " << Stats.NumSubBlocks << "\n"; 575 errs() << " Num Abbrevs: " << Stats.NumAbbrevs << "\n"; 576 errs() << " Num Records: " << Stats.NumRecords << "\n"; 577 } 578 if (Stats.NumRecords) { 579 double pct = (Stats.NumAbbreviatedRecords * 100.0) / Stats.NumRecords; 580 errs() << " Percent Abbrevs: " << format("%2.4f%%", pct) << "\n"; 581 } 582 errs() << "\n"; 583 584 // Print a histogram of the codes we see. 585 if (!NoHistogram && !Stats.CodeFreq.empty()) { 586 std::vector<std::pair<unsigned, unsigned> > FreqPairs; // <freq,code> 587 for (unsigned i = 0, e = Stats.CodeFreq.size(); i != e; ++i) 588 if (unsigned Freq = Stats.CodeFreq[i].NumInstances) 589 FreqPairs.push_back(std::make_pair(Freq, i)); 590 std::stable_sort(FreqPairs.begin(), FreqPairs.end()); 591 std::reverse(FreqPairs.begin(), FreqPairs.end()); 592 593 errs() << "\tRecord Histogram:\n"; 594 fprintf(stderr, "\t\t Count # Bits %% Abv Record Kind\n"); 595 for (unsigned i = 0, e = FreqPairs.size(); i != e; ++i) { 596 const PerRecordStats &RecStats = Stats.CodeFreq[FreqPairs[i].second]; 597 598 fprintf(stderr, "\t\t%7d %9lu ", RecStats.NumInstances, 599 (unsigned long)RecStats.TotalBits); 600 601 if (RecStats.NumAbbrev) 602 fprintf(stderr, "%7.2f ", 603 (double)RecStats.NumAbbrev/RecStats.NumInstances*100); 604 else 605 fprintf(stderr, " "); 606 607 if (const char *CodeName = 608 GetCodeName(FreqPairs[i].second, I->first, StreamFile)) 609 fprintf(stderr, "%s\n", CodeName); 610 else 611 fprintf(stderr, "UnknownCode%d\n", FreqPairs[i].second); 612 } 613 errs() << "\n"; 614 615 } 616 } 617 return 0; 618 } 619 620 621 int main(int argc, char **argv) { 622 // Print a stack trace if we signal out. 623 sys::PrintStackTraceOnErrorSignal(); 624 PrettyStackTraceProgram X(argc, argv); 625 llvm_shutdown_obj Y; // Call llvm_shutdown() on exit. 626 cl::ParseCommandLineOptions(argc, argv, "llvm-bcanalyzer file analyzer\n"); 627 628 return AnalyzeBitcode(); 629 } 630
