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/Format.h"
36 #include "llvm/Support/ManagedStatic.h"
37 #include "llvm/Support/MemoryBuffer.h"
38 #include "llvm/Support/PrettyStackTrace.h"
39 #include "llvm/Support/raw_ostream.h"
40 #include "llvm/System/Signals.h"
46 static cl::opt<std::string>
47 InputFilename(cl::Positional, cl::desc("<input bitcode>"), cl::init("-"));
49 static cl::opt<std::string>
50 OutputFilename("-o", cl::init("-"), cl::desc("<output file>"));
52 static cl::opt<bool> Dump("dump", cl::desc("Dump low level bitcode trace"));
54 //===----------------------------------------------------------------------===//
55 // Bitcode specific analysis.
56 //===----------------------------------------------------------------------===//
58 static cl::opt<bool> NoHistogram("disable-histogram",
59 cl::desc("Do not print per-code histogram"));
62 NonSymbolic("non-symbolic",
63 cl::desc("Emit numberic info in dump even if"
64 " symbolic info is available"));
66 /// CurStreamType - If we can sniff the flavor of this stream, we can produce
74 /// GetBlockName - Return a symbolic block name if known, otherwise return
76 static const char *GetBlockName(unsigned BlockID,
77 const BitstreamReader &StreamFile) {
78 // Standard blocks for all bitcode files.
79 if (BlockID < bitc::FIRST_APPLICATION_BLOCKID) {
80 if (BlockID == bitc::BLOCKINFO_BLOCK_ID)
81 return "BLOCKINFO_BLOCK";
85 // Check to see if we have a blockinfo record for this block, with a name.
86 if (const BitstreamReader::BlockInfo *Info =
87 StreamFile.getBlockInfo(BlockID)) {
88 if (!Info->Name.empty())
89 return Info->Name.c_str();
93 if (CurStreamType != LLVMIRBitstream) return 0;
97 case bitc::MODULE_BLOCK_ID: return "MODULE_BLOCK";
98 case bitc::PARAMATTR_BLOCK_ID: return "PARAMATTR_BLOCK";
99 case bitc::TYPE_BLOCK_ID: return "TYPE_BLOCK";
100 case bitc::CONSTANTS_BLOCK_ID: return "CONSTANTS_BLOCK";
101 case bitc::FUNCTION_BLOCK_ID: return "FUNCTION_BLOCK";
102 case bitc::TYPE_SYMTAB_BLOCK_ID: return "TYPE_SYMTAB";
103 case bitc::VALUE_SYMTAB_BLOCK_ID: return "VALUE_SYMTAB";
104 case bitc::METADATA_BLOCK_ID: return "METADATA_BLOCK";
105 case bitc::METADATA_ATTACHMENT_ID: return "METADATA_ATTACHMENT_BLOCK";
109 /// GetCodeName - Return a symbolic code name if known, otherwise return
111 static const char *GetCodeName(unsigned CodeID, unsigned BlockID,
112 const BitstreamReader &StreamFile) {
113 // Standard blocks for all bitcode files.
114 if (BlockID < bitc::FIRST_APPLICATION_BLOCKID) {
115 if (BlockID == bitc::BLOCKINFO_BLOCK_ID) {
118 case bitc::BLOCKINFO_CODE_SETBID: return "SETBID";
119 case bitc::BLOCKINFO_CODE_BLOCKNAME: return "BLOCKNAME";
120 case bitc::BLOCKINFO_CODE_SETRECORDNAME: return "SETRECORDNAME";
126 // Check to see if we have a blockinfo record for this record, with a name.
127 if (const BitstreamReader::BlockInfo *Info =
128 StreamFile.getBlockInfo(BlockID)) {
129 for (unsigned i = 0, e = Info->RecordNames.size(); i != e; ++i)
130 if (Info->RecordNames[i].first == CodeID)
131 return Info->RecordNames[i].second.c_str();
135 if (CurStreamType != LLVMIRBitstream) return 0;
139 case bitc::MODULE_BLOCK_ID:
142 case bitc::MODULE_CODE_VERSION: return "VERSION";
143 case bitc::MODULE_CODE_TRIPLE: return "TRIPLE";
144 case bitc::MODULE_CODE_DATALAYOUT: return "DATALAYOUT";
145 case bitc::MODULE_CODE_ASM: return "ASM";
146 case bitc::MODULE_CODE_SECTIONNAME: return "SECTIONNAME";
147 case bitc::MODULE_CODE_DEPLIB: return "DEPLIB";
148 case bitc::MODULE_CODE_GLOBALVAR: return "GLOBALVAR";
149 case bitc::MODULE_CODE_FUNCTION: return "FUNCTION";
150 case bitc::MODULE_CODE_ALIAS: return "ALIAS";
151 case bitc::MODULE_CODE_PURGEVALS: return "PURGEVALS";
152 case bitc::MODULE_CODE_GCNAME: return "GCNAME";
154 case bitc::PARAMATTR_BLOCK_ID:
157 case bitc::PARAMATTR_CODE_ENTRY: return "ENTRY";
159 case bitc::TYPE_BLOCK_ID:
162 case bitc::TYPE_CODE_NUMENTRY: return "NUMENTRY";
163 case bitc::TYPE_CODE_VOID: return "VOID";
164 case bitc::TYPE_CODE_FLOAT: return "FLOAT";
165 case bitc::TYPE_CODE_DOUBLE: return "DOUBLE";
166 case bitc::TYPE_CODE_LABEL: return "LABEL";
167 case bitc::TYPE_CODE_OPAQUE: return "OPAQUE";
168 case bitc::TYPE_CODE_INTEGER: return "INTEGER";
169 case bitc::TYPE_CODE_POINTER: return "POINTER";
170 case bitc::TYPE_CODE_FUNCTION: return "FUNCTION";
171 case bitc::TYPE_CODE_STRUCT: return "STRUCT";
172 case bitc::TYPE_CODE_ARRAY: return "ARRAY";
173 case bitc::TYPE_CODE_VECTOR: return "VECTOR";
174 case bitc::TYPE_CODE_X86_FP80: return "X86_FP80";
175 case bitc::TYPE_CODE_FP128: return "FP128";
176 case bitc::TYPE_CODE_PPC_FP128: return "PPC_FP128";
177 case bitc::TYPE_CODE_METADATA: return "METADATA";
180 case bitc::CONSTANTS_BLOCK_ID:
183 case bitc::CST_CODE_SETTYPE: return "SETTYPE";
184 case bitc::CST_CODE_NULL: return "NULL";
185 case bitc::CST_CODE_UNDEF: return "UNDEF";
186 case bitc::CST_CODE_INTEGER: return "INTEGER";
187 case bitc::CST_CODE_WIDE_INTEGER: return "WIDE_INTEGER";
188 case bitc::CST_CODE_FLOAT: return "FLOAT";
189 case bitc::CST_CODE_AGGREGATE: return "AGGREGATE";
190 case bitc::CST_CODE_STRING: return "STRING";
191 case bitc::CST_CODE_CSTRING: return "CSTRING";
192 case bitc::CST_CODE_CE_BINOP: return "CE_BINOP";
193 case bitc::CST_CODE_CE_CAST: return "CE_CAST";
194 case bitc::CST_CODE_CE_GEP: return "CE_GEP";
195 case bitc::CST_CODE_CE_INBOUNDS_GEP: return "CE_INBOUNDS_GEP";
196 case bitc::CST_CODE_CE_SELECT: return "CE_SELECT";
197 case bitc::CST_CODE_CE_EXTRACTELT: return "CE_EXTRACTELT";
198 case bitc::CST_CODE_CE_INSERTELT: return "CE_INSERTELT";
199 case bitc::CST_CODE_CE_SHUFFLEVEC: return "CE_SHUFFLEVEC";
200 case bitc::CST_CODE_CE_CMP: return "CE_CMP";
201 case bitc::CST_CODE_INLINEASM: return "INLINEASM";
202 case bitc::CST_CODE_CE_SHUFVEC_EX: return "CE_SHUFVEC_EX";
204 case bitc::FUNCTION_BLOCK_ID:
207 case bitc::FUNC_CODE_DECLAREBLOCKS: return "DECLAREBLOCKS";
209 case bitc::FUNC_CODE_INST_BINOP: return "INST_BINOP";
210 case bitc::FUNC_CODE_INST_CAST: return "INST_CAST";
211 case bitc::FUNC_CODE_INST_GEP: return "INST_GEP";
212 case bitc::FUNC_CODE_INST_INBOUNDS_GEP: return "INST_INBOUNDS_GEP";
213 case bitc::FUNC_CODE_INST_SELECT: return "INST_SELECT";
214 case bitc::FUNC_CODE_INST_EXTRACTELT: return "INST_EXTRACTELT";
215 case bitc::FUNC_CODE_INST_INSERTELT: return "INST_INSERTELT";
216 case bitc::FUNC_CODE_INST_SHUFFLEVEC: return "INST_SHUFFLEVEC";
217 case bitc::FUNC_CODE_INST_CMP: return "INST_CMP";
219 case bitc::FUNC_CODE_INST_RET: return "INST_RET";
220 case bitc::FUNC_CODE_INST_BR: return "INST_BR";
221 case bitc::FUNC_CODE_INST_SWITCH: return "INST_SWITCH";
222 case bitc::FUNC_CODE_INST_INVOKE: return "INST_INVOKE";
223 case bitc::FUNC_CODE_INST_UNWIND: return "INST_UNWIND";
224 case bitc::FUNC_CODE_INST_UNREACHABLE: return "INST_UNREACHABLE";
226 case bitc::FUNC_CODE_INST_PHI: return "INST_PHI";
227 case bitc::FUNC_CODE_INST_MALLOC: return "INST_MALLOC";
228 case bitc::FUNC_CODE_INST_FREE: return "INST_FREE";
229 case bitc::FUNC_CODE_INST_ALLOCA: return "INST_ALLOCA";
230 case bitc::FUNC_CODE_INST_LOAD: return "INST_LOAD";
231 case bitc::FUNC_CODE_INST_STORE: return "INST_STORE";
232 case bitc::FUNC_CODE_INST_CALL: return "INST_CALL";
233 case bitc::FUNC_CODE_INST_VAARG: return "INST_VAARG";
234 case bitc::FUNC_CODE_INST_STORE2: return "INST_STORE2";
235 case bitc::FUNC_CODE_INST_GETRESULT: return "INST_GETRESULT";
236 case bitc::FUNC_CODE_INST_EXTRACTVAL: return "INST_EXTRACTVAL";
237 case bitc::FUNC_CODE_INST_INSERTVAL: return "INST_INSERTVAL";
238 case bitc::FUNC_CODE_INST_CMP2: return "INST_CMP2";
239 case bitc::FUNC_CODE_INST_VSELECT: return "INST_VSELECT";
240 case bitc::FUNC_CODE_DEBUG_LOC: return "DEBUG_LOC";
241 case bitc::FUNC_CODE_DEBUG_LOC_AGAIN: return "DEBUG_LOC_AGAIN";
243 case bitc::TYPE_SYMTAB_BLOCK_ID:
246 case bitc::TST_CODE_ENTRY: return "ENTRY";
248 case bitc::VALUE_SYMTAB_BLOCK_ID:
251 case bitc::VST_CODE_ENTRY: return "ENTRY";
252 case bitc::VST_CODE_BBENTRY: return "BBENTRY";
254 case bitc::METADATA_ATTACHMENT_ID:
257 case bitc::METADATA_ATTACHMENT: return "METADATA_ATTACHMENT";
259 case bitc::METADATA_BLOCK_ID:
262 case bitc::METADATA_STRING: return "METADATA_STRING";
263 case bitc::METADATA_NODE: return "METADATA_NODE";
264 case bitc::METADATA_FN_NODE: return "METADATA_FN_NODE";
265 case bitc::METADATA_NAME: return "METADATA_NAME";
266 case bitc::METADATA_NAMED_NODE: return "METADATA_NAMED_NODE";
267 case bitc::METADATA_KIND: return "METADATA_KIND";
268 case bitc::METADATA_ATTACHMENT: return "METADATA_ATTACHMENT";
273 struct PerRecordStats {
274 unsigned NumInstances;
278 PerRecordStats() : NumInstances(0), NumAbbrev(0), TotalBits(0) {}
281 struct PerBlockIDStats {
282 /// NumInstances - This the number of times this block ID has been seen.
283 unsigned NumInstances;
285 /// NumBits - The total size in bits of all of these blocks.
288 /// NumSubBlocks - The total number of blocks these blocks contain.
289 unsigned NumSubBlocks;
291 /// NumAbbrevs - The total number of abbreviations.
294 /// NumRecords - The total number of records these blocks contain, and the
295 /// number that are abbreviated.
296 unsigned NumRecords, NumAbbreviatedRecords;
298 /// CodeFreq - Keep track of the number of times we see each code.
299 std::vector<PerRecordStats> CodeFreq;
302 : NumInstances(0), NumBits(0),
303 NumSubBlocks(0), NumAbbrevs(0), NumRecords(0), NumAbbreviatedRecords(0) {}
306 static std::map<unsigned, PerBlockIDStats> BlockIDStats;
310 /// Error - All bitcode analysis errors go through this function, making this a
311 /// good place to breakpoint if debugging.
312 static bool Error(const std::string &Err) {
313 errs() << Err << "\n";
317 /// ParseBlock - Read a block, updating statistics, etc.
318 static bool ParseBlock(BitstreamCursor &Stream, unsigned IndentLevel) {
319 std::string Indent(IndentLevel*2, ' ');
320 uint64_t BlockBitStart = Stream.GetCurrentBitNo();
321 unsigned BlockID = Stream.ReadSubBlockID();
323 // Get the statistics for this BlockID.
324 PerBlockIDStats &BlockStats = BlockIDStats[BlockID];
326 BlockStats.NumInstances++;
328 // BLOCKINFO is a special part of the stream.
329 if (BlockID == bitc::BLOCKINFO_BLOCK_ID) {
330 if (Dump) errs() << Indent << "<BLOCKINFO_BLOCK/>\n";
331 if (Stream.ReadBlockInfoBlock())
332 return Error("Malformed BlockInfoBlock");
333 uint64_t BlockBitEnd = Stream.GetCurrentBitNo();
334 BlockStats.NumBits += BlockBitEnd-BlockBitStart;
338 unsigned NumWords = 0;
339 if (Stream.EnterSubBlock(BlockID, &NumWords))
340 return Error("Malformed block record");
342 const char *BlockName = 0;
344 errs() << Indent << "<";
345 if ((BlockName = GetBlockName(BlockID, *Stream.getBitStreamReader())))
348 errs() << "UnknownBlock" << BlockID;
350 if (NonSymbolic && BlockName)
351 errs() << " BlockID=" << BlockID;
353 errs() << " NumWords=" << NumWords
354 << " BlockCodeSize=" << Stream.GetAbbrevIDWidth() << ">\n";
357 SmallVector<uint64_t, 64> Record;
359 // Read all the records for this block.
361 if (Stream.AtEndOfStream())
362 return Error("Premature end of bitstream");
364 uint64_t RecordStartBit = Stream.GetCurrentBitNo();
366 // Read the code for this record.
367 unsigned AbbrevID = Stream.ReadCode();
369 case bitc::END_BLOCK: {
370 if (Stream.ReadBlockEnd())
371 return Error("Error at end of block");
372 uint64_t BlockBitEnd = Stream.GetCurrentBitNo();
373 BlockStats.NumBits += BlockBitEnd-BlockBitStart;
375 errs() << Indent << "</";
377 errs() << BlockName << ">\n";
379 errs() << "UnknownBlock" << BlockID << ">\n";
383 case bitc::ENTER_SUBBLOCK: {
384 uint64_t SubBlockBitStart = Stream.GetCurrentBitNo();
385 if (ParseBlock(Stream, IndentLevel+1))
387 ++BlockStats.NumSubBlocks;
388 uint64_t SubBlockBitEnd = Stream.GetCurrentBitNo();
390 // Don't include subblock sizes in the size of this block.
391 BlockBitStart += SubBlockBitEnd-SubBlockBitStart;
394 case bitc::DEFINE_ABBREV:
395 Stream.ReadAbbrevRecord();
396 ++BlockStats.NumAbbrevs;
401 ++BlockStats.NumRecords;
402 if (AbbrevID != bitc::UNABBREV_RECORD)
403 ++BlockStats.NumAbbreviatedRecords;
405 const char *BlobStart = 0;
406 unsigned BlobLen = 0;
407 unsigned Code = Stream.ReadRecord(AbbrevID, Record, BlobStart, BlobLen);
411 // Increment the # occurrences of this code.
412 if (BlockStats.CodeFreq.size() <= Code)
413 BlockStats.CodeFreq.resize(Code+1);
414 BlockStats.CodeFreq[Code].NumInstances++;
415 BlockStats.CodeFreq[Code].TotalBits +=
416 Stream.GetCurrentBitNo()-RecordStartBit;
417 if (AbbrevID != bitc::UNABBREV_RECORD)
418 BlockStats.CodeFreq[Code].NumAbbrev++;
421 errs() << Indent << " <";
422 if (const char *CodeName =
423 GetCodeName(Code, BlockID, *Stream.getBitStreamReader()))
426 errs() << "UnknownCode" << Code;
428 GetCodeName(Code, BlockID, *Stream.getBitStreamReader()))
429 errs() << " codeid=" << Code;
430 if (AbbrevID != bitc::UNABBREV_RECORD)
431 errs() << " abbrevid=" << AbbrevID;
433 for (unsigned i = 0, e = Record.size(); i != e; ++i)
434 errs() << " op" << i << "=" << (int64_t)Record[i];
439 errs() << " blob data = ";
440 bool BlobIsPrintable = true;
441 for (unsigned i = 0; i != BlobLen; ++i)
442 if (!isprint(BlobStart[i])) {
443 BlobIsPrintable = false;
448 errs() << "'" << std::string(BlobStart, BlobStart+BlobLen) <<"'";
450 errs() << "unprintable, " << BlobLen << " bytes.";
461 static void PrintSize(double Bits) {
462 fprintf(stderr, "%.2f/%.2fB/%lluW", Bits, Bits/8,(unsigned long long)Bits/32);
464 static void PrintSize(uint64_t Bits) {
465 fprintf(stderr, "%llub/%.2fB/%lluW", (unsigned long long)Bits,
466 (double)Bits/8, (unsigned long long)Bits/32);
470 /// AnalyzeBitcode - Analyze the bitcode file specified by InputFilename.
471 static int AnalyzeBitcode() {
472 // Read the input file.
473 MemoryBuffer *MemBuf = MemoryBuffer::getFileOrSTDIN(InputFilename.c_str());
476 return Error("Error reading '" + InputFilename + "'.");
478 if (MemBuf->getBufferSize() & 3)
479 return Error("Bitcode stream should be a multiple of 4 bytes in length");
481 unsigned char *BufPtr = (unsigned char *)MemBuf->getBufferStart();
482 unsigned char *EndBufPtr = BufPtr+MemBuf->getBufferSize();
484 // If we have a wrapper header, parse it and ignore the non-bc file contents.
485 // The magic number is 0x0B17C0DE stored in little endian.
486 if (isBitcodeWrapper(BufPtr, EndBufPtr))
487 if (SkipBitcodeWrapperHeader(BufPtr, EndBufPtr))
488 return Error("Invalid bitcode wrapper header");
490 BitstreamReader StreamFile(BufPtr, EndBufPtr);
491 BitstreamCursor Stream(StreamFile);
492 StreamFile.CollectBlockInfoNames();
494 // Read the stream signature.
496 Signature[0] = Stream.Read(8);
497 Signature[1] = Stream.Read(8);
498 Signature[2] = Stream.Read(4);
499 Signature[3] = Stream.Read(4);
500 Signature[4] = Stream.Read(4);
501 Signature[5] = Stream.Read(4);
503 // Autodetect the file contents, if it is one we know.
504 CurStreamType = UnknownBitstream;
505 if (Signature[0] == 'B' && Signature[1] == 'C' &&
506 Signature[2] == 0x0 && Signature[3] == 0xC &&
507 Signature[4] == 0xE && Signature[5] == 0xD)
508 CurStreamType = LLVMIRBitstream;
510 unsigned NumTopBlocks = 0;
512 // Parse the top-level structure. We only allow blocks at the top-level.
513 while (!Stream.AtEndOfStream()) {
514 unsigned Code = Stream.ReadCode();
515 if (Code != bitc::ENTER_SUBBLOCK)
516 return Error("Invalid record at top-level");
518 if (ParseBlock(Stream, 0))
523 if (Dump) errs() << "\n\n";
525 uint64_t BufferSizeBits = (EndBufPtr-BufPtr)*CHAR_BIT;
526 // Print a summary of the read file.
527 errs() << "Summary of " << InputFilename << ":\n";
528 errs() << " Total size: ";
529 PrintSize(BufferSizeBits);
531 errs() << " Stream type: ";
532 switch (CurStreamType) {
533 default: assert(0 && "Unknown bitstream type");
534 case UnknownBitstream: errs() << "unknown\n"; break;
535 case LLVMIRBitstream: errs() << "LLVM IR\n"; break;
537 errs() << " # Toplevel Blocks: " << NumTopBlocks << "\n";
540 // Emit per-block stats.
541 errs() << "Per-block Summary:\n";
542 for (std::map<unsigned, PerBlockIDStats>::iterator I = BlockIDStats.begin(),
543 E = BlockIDStats.end(); I != E; ++I) {
544 errs() << " Block ID #" << I->first;
545 if (const char *BlockName = GetBlockName(I->first, StreamFile))
546 errs() << " (" << BlockName << ")";
549 const PerBlockIDStats &Stats = I->second;
550 errs() << " Num Instances: " << Stats.NumInstances << "\n";
551 errs() << " Total Size: ";
552 PrintSize(Stats.NumBits);
554 double pct = (Stats.NumBits * 100.0) / BufferSizeBits;
555 errs() << " Percent of file: " << format("%2.4f%%", pct) << "\n";
556 if (Stats.NumInstances > 1) {
557 errs() << " Average Size: ";
558 PrintSize(Stats.NumBits/(double)Stats.NumInstances);
560 errs() << " Tot/Avg SubBlocks: " << Stats.NumSubBlocks << "/"
561 << Stats.NumSubBlocks/(double)Stats.NumInstances << "\n";
562 errs() << " Tot/Avg Abbrevs: " << Stats.NumAbbrevs << "/"
563 << Stats.NumAbbrevs/(double)Stats.NumInstances << "\n";
564 errs() << " Tot/Avg Records: " << Stats.NumRecords << "/"
565 << Stats.NumRecords/(double)Stats.NumInstances << "\n";
567 errs() << " Num SubBlocks: " << Stats.NumSubBlocks << "\n";
568 errs() << " Num Abbrevs: " << Stats.NumAbbrevs << "\n";
569 errs() << " Num Records: " << Stats.NumRecords << "\n";
571 if (Stats.NumRecords) {
572 double pct = (Stats.NumAbbreviatedRecords * 100.0) / Stats.NumRecords;
573 errs() << " Percent Abbrevs: " << format("%2.4f%%", pct) << "\n";
577 // Print a histogram of the codes we see.
578 if (!NoHistogram && !Stats.CodeFreq.empty()) {
579 std::vector<std::pair<unsigned, unsigned> > FreqPairs; // <freq,code>
580 for (unsigned i = 0, e = Stats.CodeFreq.size(); i != e; ++i)
581 if (unsigned Freq = Stats.CodeFreq[i].NumInstances)
582 FreqPairs.push_back(std::make_pair(Freq, i));
583 std::stable_sort(FreqPairs.begin(), FreqPairs.end());
584 std::reverse(FreqPairs.begin(), FreqPairs.end());
586 errs() << "\tRecord Histogram:\n";
587 fprintf(stderr, "\t\t Count # Bits %% Abv Record Kind\n");
588 for (unsigned i = 0, e = FreqPairs.size(); i != e; ++i) {
589 const PerRecordStats &RecStats = Stats.CodeFreq[FreqPairs[i].second];
591 fprintf(stderr, "\t\t%7d %9llu ", RecStats.NumInstances,
592 (unsigned long long)RecStats.TotalBits);
594 if (RecStats.NumAbbrev)
595 fprintf(stderr, "%7.2f ",
596 (double)RecStats.NumAbbrev/RecStats.NumInstances*100);
598 fprintf(stderr, " ");
600 if (const char *CodeName =
601 GetCodeName(FreqPairs[i].second, I->first, StreamFile))
602 fprintf(stderr, "%s\n", CodeName);
604 fprintf(stderr, "UnknownCode%d\n", FreqPairs[i].second);
614 int main(int argc, char **argv) {
615 // Print a stack trace if we signal out.
616 sys::PrintStackTraceOnErrorSignal();
617 PrettyStackTraceProgram X(argc, argv);
618 llvm_shutdown_obj Y; // Call llvm_shutdown() on exit.
619 cl::ParseCommandLineOptions(argc, argv, "llvm-bcanalyzer file analyzer\n");
621 return AnalyzeBitcode();