1 //===-- llvm-bcanalyzer.cpp - Bitcode Analyzer --------------------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
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
15 // --help - Output information about command line switches
16 // --dump - Dump low-level bitcode structure in readable format
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).
28 //===----------------------------------------------------------------------===//
30 #include "llvm/Analysis/Verifier.h"
31 #include "llvm/Bitcode/BitstreamReader.h"
32 #include "llvm/Bitcode/LLVMBitCodes.h"
33 #include "llvm/Bitcode/ReaderWriter.h"
34 #include "llvm/Support/CommandLine.h"
35 #include "llvm/Support/ManagedStatic.h"
36 #include "llvm/Support/MemoryBuffer.h"
37 #include "llvm/Support/PrettyStackTrace.h"
38 #include "llvm/Support/raw_ostream.h"
39 #include "llvm/System/Signals.h"
44 static cl::opt<std::string>
45 InputFilename(cl::Positional, cl::desc("<input bitcode>"), cl::init("-"));
47 static cl::opt<std::string>
48 OutputFilename("-o", cl::init("-"), cl::desc("<output file>"));
50 static cl::opt<bool> Dump("dump", cl::desc("Dump low level bitcode trace"));
52 //===----------------------------------------------------------------------===//
53 // Bitcode specific analysis.
54 //===----------------------------------------------------------------------===//
56 static cl::opt<bool> NoHistogram("disable-histogram",
57 cl::desc("Do not print per-code histogram"));
60 NonSymbolic("non-symbolic",
61 cl::desc("Emit numberic info in dump even if"
62 " symbolic info is available"));
64 /// CurStreamType - If we can sniff the flavor of this stream, we can produce
72 /// GetBlockName - Return a symbolic block name if known, otherwise return
74 static const char *GetBlockName(unsigned BlockID,
75 const BitstreamReader &StreamFile) {
76 // Standard blocks for all bitcode files.
77 if (BlockID < bitc::FIRST_APPLICATION_BLOCKID) {
78 if (BlockID == bitc::BLOCKINFO_BLOCK_ID)
79 return "BLOCKINFO_BLOCK";
83 // Check to see if we have a blockinfo record for this block, with a name.
84 if (const BitstreamReader::BlockInfo *Info =
85 StreamFile.getBlockInfo(BlockID)) {
86 if (!Info->Name.empty())
87 return Info->Name.c_str();
91 if (CurStreamType != LLVMIRBitstream) return 0;
95 case bitc::MODULE_BLOCK_ID: return "MODULE_BLOCK";
96 case bitc::PARAMATTR_BLOCK_ID: return "PARAMATTR_BLOCK";
97 case bitc::TYPE_BLOCK_ID: return "TYPE_BLOCK";
98 case bitc::CONSTANTS_BLOCK_ID: return "CONSTANTS_BLOCK";
99 case bitc::FUNCTION_BLOCK_ID: return "FUNCTION_BLOCK";
100 case bitc::TYPE_SYMTAB_BLOCK_ID: return "TYPE_SYMTAB";
101 case bitc::VALUE_SYMTAB_BLOCK_ID: return "VALUE_SYMTAB";
102 case bitc::METADATA_BLOCK_ID: return "METADATA_BLOCK";
106 /// GetCodeName - Return a symbolic code name if known, otherwise return
108 static const char *GetCodeName(unsigned CodeID, unsigned BlockID,
109 const BitstreamReader &StreamFile) {
110 // Standard blocks for all bitcode files.
111 if (BlockID < bitc::FIRST_APPLICATION_BLOCKID) {
112 if (BlockID == bitc::BLOCKINFO_BLOCK_ID) {
115 case bitc::BLOCKINFO_CODE_SETBID: return "SETBID";
116 case bitc::BLOCKINFO_CODE_BLOCKNAME: return "BLOCKNAME";
117 case bitc::BLOCKINFO_CODE_SETRECORDNAME: return "SETRECORDNAME";
123 // Check to see if we have a blockinfo record for this record, with a name.
124 if (const BitstreamReader::BlockInfo *Info =
125 StreamFile.getBlockInfo(BlockID)) {
126 for (unsigned i = 0, e = Info->RecordNames.size(); i != e; ++i)
127 if (Info->RecordNames[i].first == CodeID)
128 return Info->RecordNames[i].second.c_str();
132 if (CurStreamType != LLVMIRBitstream) return 0;
136 case bitc::MODULE_BLOCK_ID:
139 case bitc::MODULE_CODE_VERSION: return "VERSION";
140 case bitc::MODULE_CODE_TRIPLE: return "TRIPLE";
141 case bitc::MODULE_CODE_DATALAYOUT: return "DATALAYOUT";
142 case bitc::MODULE_CODE_ASM: return "ASM";
143 case bitc::MODULE_CODE_SECTIONNAME: return "SECTIONNAME";
144 case bitc::MODULE_CODE_DEPLIB: return "DEPLIB";
145 case bitc::MODULE_CODE_GLOBALVAR: return "GLOBALVAR";
146 case bitc::MODULE_CODE_FUNCTION: return "FUNCTION";
147 case bitc::MODULE_CODE_ALIAS: return "ALIAS";
148 case bitc::MODULE_CODE_PURGEVALS: return "PURGEVALS";
149 case bitc::MODULE_CODE_GCNAME: return "GCNAME";
151 case bitc::PARAMATTR_BLOCK_ID:
154 case bitc::PARAMATTR_CODE_ENTRY: return "ENTRY";
156 case bitc::TYPE_BLOCK_ID:
159 case bitc::TYPE_CODE_NUMENTRY: return "NUMENTRY";
160 case bitc::TYPE_CODE_VOID: return "VOID";
161 case bitc::TYPE_CODE_FLOAT: return "FLOAT";
162 case bitc::TYPE_CODE_DOUBLE: return "DOUBLE";
163 case bitc::TYPE_CODE_LABEL: return "LABEL";
164 case bitc::TYPE_CODE_OPAQUE: return "OPAQUE";
165 case bitc::TYPE_CODE_INTEGER: return "INTEGER";
166 case bitc::TYPE_CODE_POINTER: return "POINTER";
167 case bitc::TYPE_CODE_FUNCTION: return "FUNCTION";
168 case bitc::TYPE_CODE_STRUCT: return "STRUCT";
169 case bitc::TYPE_CODE_ARRAY: return "ARRAY";
170 case bitc::TYPE_CODE_VECTOR: return "VECTOR";
171 case bitc::TYPE_CODE_X86_FP80: return "X86_FP80";
172 case bitc::TYPE_CODE_FP128: return "FP128";
173 case bitc::TYPE_CODE_PPC_FP128: return "PPC_FP128";
174 case bitc::TYPE_CODE_METADATA: return "METADATA";
177 case bitc::CONSTANTS_BLOCK_ID:
180 case bitc::CST_CODE_SETTYPE: return "SETTYPE";
181 case bitc::CST_CODE_NULL: return "NULL";
182 case bitc::CST_CODE_UNDEF: return "UNDEF";
183 case bitc::CST_CODE_INTEGER: return "INTEGER";
184 case bitc::CST_CODE_WIDE_INTEGER: return "WIDE_INTEGER";
185 case bitc::CST_CODE_FLOAT: return "FLOAT";
186 case bitc::CST_CODE_AGGREGATE: return "AGGREGATE";
187 case bitc::CST_CODE_STRING: return "STRING";
188 case bitc::CST_CODE_CSTRING: return "CSTRING";
189 case bitc::CST_CODE_CE_BINOP: return "CE_BINOP";
190 case bitc::CST_CODE_CE_CAST: return "CE_CAST";
191 case bitc::CST_CODE_CE_GEP: return "CE_GEP";
192 case bitc::CST_CODE_CE_SELECT: return "CE_SELECT";
193 case bitc::CST_CODE_CE_EXTRACTELT: return "CE_EXTRACTELT";
194 case bitc::CST_CODE_CE_INSERTELT: return "CE_INSERTELT";
195 case bitc::CST_CODE_CE_SHUFFLEVEC: return "CE_SHUFFLEVEC";
196 case bitc::CST_CODE_CE_CMP: return "CE_CMP";
197 case bitc::CST_CODE_INLINEASM: return "INLINEASM";
198 case bitc::CST_CODE_CE_SHUFVEC_EX: return "CE_SHUFVEC_EX";
200 case bitc::FUNCTION_BLOCK_ID:
203 case bitc::FUNC_CODE_DECLAREBLOCKS: return "DECLAREBLOCKS";
205 case bitc::FUNC_CODE_INST_BINOP: return "INST_BINOP";
206 case bitc::FUNC_CODE_INST_CAST: return "INST_CAST";
207 case bitc::FUNC_CODE_INST_GEP: return "INST_GEP";
208 case bitc::FUNC_CODE_INST_SELECT: return "INST_SELECT";
209 case bitc::FUNC_CODE_INST_EXTRACTELT: return "INST_EXTRACTELT";
210 case bitc::FUNC_CODE_INST_INSERTELT: return "INST_INSERTELT";
211 case bitc::FUNC_CODE_INST_SHUFFLEVEC: return "INST_SHUFFLEVEC";
212 case bitc::FUNC_CODE_INST_CMP: return "INST_CMP";
214 case bitc::FUNC_CODE_INST_RET: return "INST_RET";
215 case bitc::FUNC_CODE_INST_BR: return "INST_BR";
216 case bitc::FUNC_CODE_INST_SWITCH: return "INST_SWITCH";
217 case bitc::FUNC_CODE_INST_INVOKE: return "INST_INVOKE";
218 case bitc::FUNC_CODE_INST_UNWIND: return "INST_UNWIND";
219 case bitc::FUNC_CODE_INST_UNREACHABLE: return "INST_UNREACHABLE";
221 case bitc::FUNC_CODE_INST_PHI: return "INST_PHI";
222 case bitc::FUNC_CODE_INST_MALLOC: return "INST_MALLOC";
223 case bitc::FUNC_CODE_INST_FREE: return "INST_FREE";
224 case bitc::FUNC_CODE_INST_ALLOCA: return "INST_ALLOCA";
225 case bitc::FUNC_CODE_INST_LOAD: return "INST_LOAD";
226 case bitc::FUNC_CODE_INST_STORE: return "INST_STORE";
227 case bitc::FUNC_CODE_INST_CALL: return "INST_CALL";
228 case bitc::FUNC_CODE_INST_VAARG: return "INST_VAARG";
229 case bitc::FUNC_CODE_INST_STORE2: return "INST_STORE2";
230 case bitc::FUNC_CODE_INST_GETRESULT: return "INST_GETRESULT";
231 case bitc::FUNC_CODE_INST_EXTRACTVAL: return "INST_EXTRACTVAL";
232 case bitc::FUNC_CODE_INST_INSERTVAL: return "INST_INSERTVAL";
233 case bitc::FUNC_CODE_INST_CMP2: return "INST_CMP2";
234 case bitc::FUNC_CODE_INST_VSELECT: return "INST_VSELECT";
236 case bitc::TYPE_SYMTAB_BLOCK_ID:
239 case bitc::TST_CODE_ENTRY: return "ENTRY";
241 case bitc::VALUE_SYMTAB_BLOCK_ID:
244 case bitc::VST_CODE_ENTRY: return "ENTRY";
245 case bitc::VST_CODE_BBENTRY: return "BBENTRY";
247 case bitc::METADATA_BLOCK_ID:
250 case bitc::METADATA_STRING: return "MDSTRING";
251 case bitc::METADATA_NODE: return "MDNODE";
252 case bitc::METADATA_NAME: return "METADATA_NAME";
253 case bitc::METADATA_NAMED_NODE: return "NAMEDMDNODE";
258 struct PerRecordStats {
259 unsigned NumInstances;
263 PerRecordStats() : NumInstances(0), NumAbbrev(0), TotalBits(0) {}
266 struct PerBlockIDStats {
267 /// NumInstances - This the number of times this block ID has been seen.
268 unsigned NumInstances;
270 /// NumBits - The total size in bits of all of these blocks.
273 /// NumSubBlocks - The total number of blocks these blocks contain.
274 unsigned NumSubBlocks;
276 /// NumAbbrevs - The total number of abbreviations.
279 /// NumRecords - The total number of records these blocks contain, and the
280 /// number that are abbreviated.
281 unsigned NumRecords, NumAbbreviatedRecords;
283 /// CodeFreq - Keep track of the number of times we see each code.
284 std::vector<PerRecordStats> CodeFreq;
287 : NumInstances(0), NumBits(0),
288 NumSubBlocks(0), NumAbbrevs(0), NumRecords(0), NumAbbreviatedRecords(0) {}
291 static std::map<unsigned, PerBlockIDStats> BlockIDStats;
295 /// Error - All bitcode analysis errors go through this function, making this a
296 /// good place to breakpoint if debugging.
297 static bool Error(const std::string &Err) {
298 errs() << Err << "\n";
302 /// ParseBlock - Read a block, updating statistics, etc.
303 static bool ParseBlock(BitstreamCursor &Stream, unsigned IndentLevel) {
304 std::string Indent(IndentLevel*2, ' ');
305 uint64_t BlockBitStart = Stream.GetCurrentBitNo();
306 unsigned BlockID = Stream.ReadSubBlockID();
308 // Get the statistics for this BlockID.
309 PerBlockIDStats &BlockStats = BlockIDStats[BlockID];
311 BlockStats.NumInstances++;
313 // BLOCKINFO is a special part of the stream.
314 if (BlockID == bitc::BLOCKINFO_BLOCK_ID) {
315 if (Dump) errs() << Indent << "<BLOCKINFO_BLOCK/>\n";
316 if (Stream.ReadBlockInfoBlock())
317 return Error("Malformed BlockInfoBlock");
318 uint64_t BlockBitEnd = Stream.GetCurrentBitNo();
319 BlockStats.NumBits += BlockBitEnd-BlockBitStart;
323 unsigned NumWords = 0;
324 if (Stream.EnterSubBlock(BlockID, &NumWords))
325 return Error("Malformed block record");
327 const char *BlockName = 0;
329 errs() << Indent << "<";
330 if ((BlockName = GetBlockName(BlockID, *Stream.getBitStreamReader())))
333 errs() << "UnknownBlock" << BlockID;
335 if (NonSymbolic && BlockName)
336 errs() << " BlockID=" << BlockID;
338 errs() << " NumWords=" << NumWords
339 << " BlockCodeSize=" << Stream.GetAbbrevIDWidth() << ">\n";
342 SmallVector<uint64_t, 64> Record;
344 // Read all the records for this block.
346 if (Stream.AtEndOfStream())
347 return Error("Premature end of bitstream");
349 uint64_t RecordStartBit = Stream.GetCurrentBitNo();
351 // Read the code for this record.
352 unsigned AbbrevID = Stream.ReadCode();
354 case bitc::END_BLOCK: {
355 if (Stream.ReadBlockEnd())
356 return Error("Error at end of block");
357 uint64_t BlockBitEnd = Stream.GetCurrentBitNo();
358 BlockStats.NumBits += BlockBitEnd-BlockBitStart;
360 errs() << Indent << "</";
362 errs() << BlockName << ">\n";
364 errs() << "UnknownBlock" << BlockID << ">\n";
368 case bitc::ENTER_SUBBLOCK: {
369 uint64_t SubBlockBitStart = Stream.GetCurrentBitNo();
370 if (ParseBlock(Stream, IndentLevel+1))
372 ++BlockStats.NumSubBlocks;
373 uint64_t SubBlockBitEnd = Stream.GetCurrentBitNo();
375 // Don't include subblock sizes in the size of this block.
376 BlockBitStart += SubBlockBitEnd-SubBlockBitStart;
379 case bitc::DEFINE_ABBREV:
380 Stream.ReadAbbrevRecord();
381 ++BlockStats.NumAbbrevs;
386 ++BlockStats.NumRecords;
387 if (AbbrevID != bitc::UNABBREV_RECORD)
388 ++BlockStats.NumAbbreviatedRecords;
390 const char *BlobStart = 0;
391 unsigned BlobLen = 0;
392 unsigned Code = Stream.ReadRecord(AbbrevID, Record, BlobStart, BlobLen);
396 // Increment the # occurrences of this code.
397 if (BlockStats.CodeFreq.size() <= Code)
398 BlockStats.CodeFreq.resize(Code+1);
399 BlockStats.CodeFreq[Code].NumInstances++;
400 BlockStats.CodeFreq[Code].TotalBits +=
401 Stream.GetCurrentBitNo()-RecordStartBit;
402 if (AbbrevID != bitc::UNABBREV_RECORD)
403 BlockStats.CodeFreq[Code].NumAbbrev++;
406 errs() << Indent << " <";
407 if (const char *CodeName =
408 GetCodeName(Code, BlockID, *Stream.getBitStreamReader()))
411 errs() << "UnknownCode" << Code;
413 GetCodeName(Code, BlockID, *Stream.getBitStreamReader()))
414 errs() << " codeid=" << Code;
415 if (AbbrevID != bitc::UNABBREV_RECORD)
416 errs() << " abbrevid=" << AbbrevID;
418 for (unsigned i = 0, e = Record.size(); i != e; ++i)
419 errs() << " op" << i << "=" << (int64_t)Record[i];
424 errs() << " blob data = ";
425 bool BlobIsPrintable = true;
426 for (unsigned i = 0; i != BlobLen; ++i)
427 if (!isprint(BlobStart[i])) {
428 BlobIsPrintable = false;
433 errs() << "'" << std::string(BlobStart, BlobStart+BlobLen) <<"'";
435 errs() << "unprintable, " << BlobLen << " bytes.";
446 static void PrintSize(double Bits) {
447 fprintf(stderr, "%.2f/%.2fB/%lluW", Bits, Bits/8,(unsigned long long)Bits/32);
449 static void PrintSize(uint64_t Bits) {
450 fprintf(stderr, "%llub/%.2fB/%lluW", (unsigned long long)Bits,
451 (double)Bits/8, (unsigned long long)Bits/32);
455 /// AnalyzeBitcode - Analyze the bitcode file specified by InputFilename.
456 static int AnalyzeBitcode() {
457 // Read the input file.
458 MemoryBuffer *MemBuf = MemoryBuffer::getFileOrSTDIN(InputFilename.c_str());
461 return Error("Error reading '" + InputFilename + "'.");
463 if (MemBuf->getBufferSize() & 3)
464 return Error("Bitcode stream should be a multiple of 4 bytes in length");
466 unsigned char *BufPtr = (unsigned char *)MemBuf->getBufferStart();
467 unsigned char *EndBufPtr = BufPtr+MemBuf->getBufferSize();
469 // If we have a wrapper header, parse it and ignore the non-bc file contents.
470 // The magic number is 0x0B17C0DE stored in little endian.
471 if (isBitcodeWrapper(BufPtr, EndBufPtr))
472 if (SkipBitcodeWrapperHeader(BufPtr, EndBufPtr))
473 return Error("Invalid bitcode wrapper header");
475 BitstreamReader StreamFile(BufPtr, EndBufPtr);
476 BitstreamCursor Stream(StreamFile);
477 StreamFile.CollectBlockInfoNames();
479 // Read the stream signature.
481 Signature[0] = Stream.Read(8);
482 Signature[1] = Stream.Read(8);
483 Signature[2] = Stream.Read(4);
484 Signature[3] = Stream.Read(4);
485 Signature[4] = Stream.Read(4);
486 Signature[5] = Stream.Read(4);
488 // Autodetect the file contents, if it is one we know.
489 CurStreamType = UnknownBitstream;
490 if (Signature[0] == 'B' && Signature[1] == 'C' &&
491 Signature[2] == 0x0 && Signature[3] == 0xC &&
492 Signature[4] == 0xE && Signature[5] == 0xD)
493 CurStreamType = LLVMIRBitstream;
495 unsigned NumTopBlocks = 0;
497 // Parse the top-level structure. We only allow blocks at the top-level.
498 while (!Stream.AtEndOfStream()) {
499 unsigned Code = Stream.ReadCode();
500 if (Code != bitc::ENTER_SUBBLOCK)
501 return Error("Invalid record at top-level");
503 if (ParseBlock(Stream, 0))
508 if (Dump) errs() << "\n\n";
510 uint64_t BufferSizeBits = (EndBufPtr-BufPtr)*CHAR_BIT;
511 // Print a summary of the read file.
512 errs() << "Summary of " << InputFilename << ":\n";
513 errs() << " Total size: ";
514 PrintSize(BufferSizeBits);
516 errs() << " Stream type: ";
517 switch (CurStreamType) {
518 default: assert(0 && "Unknown bitstream type");
519 case UnknownBitstream: errs() << "unknown\n"; break;
520 case LLVMIRBitstream: errs() << "LLVM IR\n"; break;
522 errs() << " # Toplevel Blocks: " << NumTopBlocks << "\n";
525 // Emit per-block stats.
526 errs() << "Per-block Summary:\n";
527 for (std::map<unsigned, PerBlockIDStats>::iterator I = BlockIDStats.begin(),
528 E = BlockIDStats.end(); I != E; ++I) {
529 errs() << " Block ID #" << I->first;
530 if (const char *BlockName = GetBlockName(I->first, StreamFile))
531 errs() << " (" << BlockName << ")";
534 const PerBlockIDStats &Stats = I->second;
535 errs() << " Num Instances: " << Stats.NumInstances << "\n";
536 errs() << " Total Size: ";
537 PrintSize(Stats.NumBits);
539 errs() << " % of file: "
540 << Stats.NumBits/(double)BufferSizeBits*100 << "\n";
541 if (Stats.NumInstances > 1) {
542 errs() << " Average Size: ";
543 PrintSize(Stats.NumBits/(double)Stats.NumInstances);
545 errs() << " Tot/Avg SubBlocks: " << Stats.NumSubBlocks << "/"
546 << Stats.NumSubBlocks/(double)Stats.NumInstances << "\n";
547 errs() << " Tot/Avg Abbrevs: " << Stats.NumAbbrevs << "/"
548 << Stats.NumAbbrevs/(double)Stats.NumInstances << "\n";
549 errs() << " Tot/Avg Records: " << Stats.NumRecords << "/"
550 << Stats.NumRecords/(double)Stats.NumInstances << "\n";
552 errs() << " Num SubBlocks: " << Stats.NumSubBlocks << "\n";
553 errs() << " Num Abbrevs: " << Stats.NumAbbrevs << "\n";
554 errs() << " Num Records: " << Stats.NumRecords << "\n";
556 if (Stats.NumRecords)
557 errs() << " % Abbrev Recs: " << (Stats.NumAbbreviatedRecords/
558 (double)Stats.NumRecords)*100 << "\n";
561 // Print a histogram of the codes we see.
562 if (!NoHistogram && !Stats.CodeFreq.empty()) {
563 std::vector<std::pair<unsigned, unsigned> > FreqPairs; // <freq,code>
564 for (unsigned i = 0, e = Stats.CodeFreq.size(); i != e; ++i)
565 if (unsigned Freq = Stats.CodeFreq[i].NumInstances)
566 FreqPairs.push_back(std::make_pair(Freq, i));
567 std::stable_sort(FreqPairs.begin(), FreqPairs.end());
568 std::reverse(FreqPairs.begin(), FreqPairs.end());
570 errs() << "\tRecord Histogram:\n";
571 fprintf(stderr, "\t\t Count # Bits %% Abv Record Kind\n");
572 for (unsigned i = 0, e = FreqPairs.size(); i != e; ++i) {
573 const PerRecordStats &RecStats = Stats.CodeFreq[FreqPairs[i].second];
575 fprintf(stderr, "\t\t%7d %9llu ", RecStats.NumInstances,
576 (unsigned long long)RecStats.TotalBits);
578 if (RecStats.NumAbbrev)
579 fprintf(stderr, "%7.2f ",
580 (double)RecStats.NumAbbrev/RecStats.NumInstances*100);
582 fprintf(stderr, " ");
584 if (const char *CodeName =
585 GetCodeName(FreqPairs[i].second, I->first, StreamFile))
586 fprintf(stderr, "%s\n", CodeName);
588 fprintf(stderr, "UnknownCode%d\n", FreqPairs[i].second);
598 int main(int argc, char **argv) {
599 // Print a stack trace if we signal out.
600 sys::PrintStackTraceOnErrorSignal();
601 PrettyStackTraceProgram X(argc, argv);
602 llvm_shutdown_obj Y; // Call llvm_shutdown() on exit.
603 cl::ParseCommandLineOptions(argc, argv, "llvm-bcanalyzer file analyzer\n");
605 return AnalyzeBitcode();