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/ADT/OwningPtr.h"
31 #include "llvm/Bitcode/BitstreamReader.h"
32 #include "llvm/Bitcode/LLVMBitCodes.h"
33 #include "llvm/Bitcode/ReaderWriter.h"
34 #include "llvm/IR/Verifier.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/Signals.h"
41 #include "llvm/Support/raw_ostream.h"
42 #include "llvm/Support/system_error.h"
48 static cl::opt<std::string>
49 InputFilename(cl::Positional, cl::desc("<input bitcode>"), cl::init("-"));
51 static cl::opt<bool> Dump("dump", cl::desc("Dump low level bitcode trace"));
53 //===----------------------------------------------------------------------===//
54 // Bitcode specific analysis.
55 //===----------------------------------------------------------------------===//
57 static cl::opt<bool> NoHistogram("disable-histogram",
58 cl::desc("Do not print per-code histogram"));
61 NonSymbolic("non-symbolic",
62 cl::desc("Emit numeric info in dump even if"
63 " symbolic info is available"));
67 /// CurStreamTypeType - A type for CurStreamType
68 enum CurStreamTypeType {
75 /// CurStreamType - If we can sniff the flavor of this stream, we can produce
77 static CurStreamTypeType CurStreamType;
80 /// GetBlockName - Return a symbolic block name if known, otherwise return
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";
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();
99 if (CurStreamType != LLVMIRBitstream) return 0;
103 case bitc::MODULE_BLOCK_ID: return "MODULE_BLOCK";
104 case bitc::PARAMATTR_BLOCK_ID: return "PARAMATTR_BLOCK";
105 case bitc::PARAMATTR_GROUP_BLOCK_ID: return "PARAMATTR_GROUP_BLOCK_ID";
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::VALUE_SYMTAB_BLOCK_ID: return "VALUE_SYMTAB";
110 case bitc::METADATA_BLOCK_ID: return "METADATA_BLOCK";
111 case bitc::METADATA_ATTACHMENT_ID: return "METADATA_ATTACHMENT_BLOCK";
112 case bitc::USELIST_BLOCK_ID: return "USELIST_BLOCK_ID";
116 /// GetCodeName - Return a symbolic code name if known, otherwise return
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) {
125 case bitc::BLOCKINFO_CODE_SETBID: return "SETBID";
126 case bitc::BLOCKINFO_CODE_BLOCKNAME: return "BLOCKNAME";
127 case bitc::BLOCKINFO_CODE_SETRECORDNAME: return "SETRECORDNAME";
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();
142 if (CurStreamType != LLVMIRBitstream) return 0;
146 case bitc::MODULE_BLOCK_ID:
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"; // FIXME: Remove in 4.0
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";
161 case bitc::PARAMATTR_BLOCK_ID:
164 case bitc::PARAMATTR_CODE_ENTRY_OLD: return "ENTRY";
165 case bitc::PARAMATTR_CODE_ENTRY: return "ENTRY";
166 case bitc::PARAMATTR_GRP_CODE_ENTRY: return "ENTRY";
168 case bitc::TYPE_BLOCK_ID_NEW:
171 case bitc::TYPE_CODE_NUMENTRY: return "NUMENTRY";
172 case bitc::TYPE_CODE_VOID: return "VOID";
173 case bitc::TYPE_CODE_FLOAT: return "FLOAT";
174 case bitc::TYPE_CODE_DOUBLE: return "DOUBLE";
175 case bitc::TYPE_CODE_LABEL: return "LABEL";
176 case bitc::TYPE_CODE_OPAQUE: return "OPAQUE";
177 case bitc::TYPE_CODE_INTEGER: return "INTEGER";
178 case bitc::TYPE_CODE_POINTER: return "POINTER";
179 case bitc::TYPE_CODE_ARRAY: return "ARRAY";
180 case bitc::TYPE_CODE_VECTOR: return "VECTOR";
181 case bitc::TYPE_CODE_X86_FP80: return "X86_FP80";
182 case bitc::TYPE_CODE_FP128: return "FP128";
183 case bitc::TYPE_CODE_PPC_FP128: return "PPC_FP128";
184 case bitc::TYPE_CODE_METADATA: return "METADATA";
185 case bitc::TYPE_CODE_STRUCT_ANON: return "STRUCT_ANON";
186 case bitc::TYPE_CODE_STRUCT_NAME: return "STRUCT_NAME";
187 case bitc::TYPE_CODE_STRUCT_NAMED: return "STRUCT_NAMED";
188 case bitc::TYPE_CODE_FUNCTION: return "FUNCTION";
191 case bitc::CONSTANTS_BLOCK_ID:
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 case bitc::CST_CODE_BLOCKADDRESS: return "CST_CODE_BLOCKADDRESS";
215 case bitc::CST_CODE_DATA: return "DATA";
217 case bitc::FUNCTION_BLOCK_ID:
220 case bitc::FUNC_CODE_DECLAREBLOCKS: return "DECLAREBLOCKS";
222 case bitc::FUNC_CODE_INST_BINOP: return "INST_BINOP";
223 case bitc::FUNC_CODE_INST_CAST: return "INST_CAST";
224 case bitc::FUNC_CODE_INST_GEP: return "INST_GEP";
225 case bitc::FUNC_CODE_INST_INBOUNDS_GEP: return "INST_INBOUNDS_GEP";
226 case bitc::FUNC_CODE_INST_SELECT: return "INST_SELECT";
227 case bitc::FUNC_CODE_INST_EXTRACTELT: return "INST_EXTRACTELT";
228 case bitc::FUNC_CODE_INST_INSERTELT: return "INST_INSERTELT";
229 case bitc::FUNC_CODE_INST_SHUFFLEVEC: return "INST_SHUFFLEVEC";
230 case bitc::FUNC_CODE_INST_CMP: return "INST_CMP";
232 case bitc::FUNC_CODE_INST_RET: return "INST_RET";
233 case bitc::FUNC_CODE_INST_BR: return "INST_BR";
234 case bitc::FUNC_CODE_INST_SWITCH: return "INST_SWITCH";
235 case bitc::FUNC_CODE_INST_INVOKE: return "INST_INVOKE";
236 case bitc::FUNC_CODE_INST_UNREACHABLE: return "INST_UNREACHABLE";
238 case bitc::FUNC_CODE_INST_PHI: return "INST_PHI";
239 case bitc::FUNC_CODE_INST_ALLOCA: return "INST_ALLOCA";
240 case bitc::FUNC_CODE_INST_LOAD: return "INST_LOAD";
241 case bitc::FUNC_CODE_INST_VAARG: return "INST_VAARG";
242 case bitc::FUNC_CODE_INST_STORE: return "INST_STORE";
243 case bitc::FUNC_CODE_INST_EXTRACTVAL: return "INST_EXTRACTVAL";
244 case bitc::FUNC_CODE_INST_INSERTVAL: return "INST_INSERTVAL";
245 case bitc::FUNC_CODE_INST_CMP2: return "INST_CMP2";
246 case bitc::FUNC_CODE_INST_VSELECT: return "INST_VSELECT";
247 case bitc::FUNC_CODE_DEBUG_LOC_AGAIN: return "DEBUG_LOC_AGAIN";
248 case bitc::FUNC_CODE_INST_CALL: return "INST_CALL";
249 case bitc::FUNC_CODE_DEBUG_LOC: return "DEBUG_LOC";
251 case bitc::VALUE_SYMTAB_BLOCK_ID:
254 case bitc::VST_CODE_ENTRY: return "ENTRY";
255 case bitc::VST_CODE_BBENTRY: return "BBENTRY";
257 case bitc::METADATA_ATTACHMENT_ID:
260 case bitc::METADATA_ATTACHMENT: return "METADATA_ATTACHMENT";
262 case bitc::METADATA_BLOCK_ID:
265 case bitc::METADATA_STRING: return "METADATA_STRING";
266 case bitc::METADATA_NAME: return "METADATA_NAME";
267 case bitc::METADATA_KIND: return "METADATA_KIND";
268 case bitc::METADATA_NODE: return "METADATA_NODE";
269 case bitc::METADATA_FN_NODE: return "METADATA_FN_NODE";
270 case bitc::METADATA_NAMED_NODE: return "METADATA_NAMED_NODE";
272 case bitc::USELIST_BLOCK_ID:
275 case bitc::USELIST_CODE_ENTRY: return "USELIST_CODE_ENTRY";
280 struct PerRecordStats {
281 unsigned NumInstances;
285 PerRecordStats() : NumInstances(0), NumAbbrev(0), TotalBits(0) {}
288 struct PerBlockIDStats {
289 /// NumInstances - This the number of times this block ID has been seen.
290 unsigned NumInstances;
292 /// NumBits - The total size in bits of all of these blocks.
295 /// NumSubBlocks - The total number of blocks these blocks contain.
296 unsigned NumSubBlocks;
298 /// NumAbbrevs - The total number of abbreviations.
301 /// NumRecords - The total number of records these blocks contain, and the
302 /// number that are abbreviated.
303 unsigned NumRecords, NumAbbreviatedRecords;
305 /// CodeFreq - Keep track of the number of times we see each code.
306 std::vector<PerRecordStats> CodeFreq;
309 : NumInstances(0), NumBits(0),
310 NumSubBlocks(0), NumAbbrevs(0), NumRecords(0), NumAbbreviatedRecords(0) {}
313 static std::map<unsigned, PerBlockIDStats> BlockIDStats;
317 /// Error - All bitcode analysis errors go through this function, making this a
318 /// good place to breakpoint if debugging.
319 static bool Error(const std::string &Err) {
320 errs() << Err << "\n";
324 /// ParseBlock - Read a block, updating statistics, etc.
325 static bool ParseBlock(BitstreamCursor &Stream, unsigned BlockID,
326 unsigned IndentLevel) {
327 std::string Indent(IndentLevel*2, ' ');
328 uint64_t BlockBitStart = Stream.GetCurrentBitNo();
330 // Get the statistics for this BlockID.
331 PerBlockIDStats &BlockStats = BlockIDStats[BlockID];
333 BlockStats.NumInstances++;
335 // BLOCKINFO is a special part of the stream.
336 if (BlockID == bitc::BLOCKINFO_BLOCK_ID) {
337 if (Dump) outs() << Indent << "<BLOCKINFO_BLOCK/>\n";
338 if (Stream.ReadBlockInfoBlock())
339 return Error("Malformed BlockInfoBlock");
340 uint64_t BlockBitEnd = Stream.GetCurrentBitNo();
341 BlockStats.NumBits += BlockBitEnd-BlockBitStart;
345 unsigned NumWords = 0;
346 if (Stream.EnterSubBlock(BlockID, &NumWords))
347 return Error("Malformed block record");
349 const char *BlockName = 0;
351 outs() << Indent << "<";
352 if ((BlockName = GetBlockName(BlockID, *Stream.getBitStreamReader())))
355 outs() << "UnknownBlock" << BlockID;
357 if (NonSymbolic && BlockName)
358 outs() << " BlockID=" << BlockID;
360 outs() << " NumWords=" << NumWords
361 << " BlockCodeSize=" << Stream.getAbbrevIDWidth() << ">\n";
364 SmallVector<uint64_t, 64> Record;
366 // Read all the records for this block.
368 if (Stream.AtEndOfStream())
369 return Error("Premature end of bitstream");
371 uint64_t RecordStartBit = Stream.GetCurrentBitNo();
373 BitstreamEntry Entry =
374 Stream.advance(BitstreamCursor::AF_DontAutoprocessAbbrevs);
376 switch (Entry.Kind) {
377 case BitstreamEntry::Error:
378 return Error("malformed bitcode file");
379 case BitstreamEntry::EndBlock: {
380 uint64_t BlockBitEnd = Stream.GetCurrentBitNo();
381 BlockStats.NumBits += BlockBitEnd-BlockBitStart;
383 outs() << Indent << "</";
385 outs() << BlockName << ">\n";
387 outs() << "UnknownBlock" << BlockID << ">\n";
392 case BitstreamEntry::SubBlock: {
393 uint64_t SubBlockBitStart = Stream.GetCurrentBitNo();
394 if (ParseBlock(Stream, Entry.ID, IndentLevel+1))
396 ++BlockStats.NumSubBlocks;
397 uint64_t SubBlockBitEnd = Stream.GetCurrentBitNo();
399 // Don't include subblock sizes in the size of this block.
400 BlockBitStart += SubBlockBitEnd-SubBlockBitStart;
403 case BitstreamEntry::Record:
404 // The interesting case.
408 if (Entry.ID == bitc::DEFINE_ABBREV) {
409 Stream.ReadAbbrevRecord();
410 ++BlockStats.NumAbbrevs;
416 ++BlockStats.NumRecords;
419 unsigned Code = Stream.readRecord(Entry.ID, Record, &Blob);
421 // Increment the # occurrences of this code.
422 if (BlockStats.CodeFreq.size() <= Code)
423 BlockStats.CodeFreq.resize(Code+1);
424 BlockStats.CodeFreq[Code].NumInstances++;
425 BlockStats.CodeFreq[Code].TotalBits +=
426 Stream.GetCurrentBitNo()-RecordStartBit;
427 if (Entry.ID != bitc::UNABBREV_RECORD) {
428 BlockStats.CodeFreq[Code].NumAbbrev++;
429 ++BlockStats.NumAbbreviatedRecords;
433 outs() << Indent << " <";
434 if (const char *CodeName =
435 GetCodeName(Code, BlockID, *Stream.getBitStreamReader()))
438 outs() << "UnknownCode" << Code;
440 GetCodeName(Code, BlockID, *Stream.getBitStreamReader()))
441 outs() << " codeid=" << Code;
442 if (Entry.ID != bitc::UNABBREV_RECORD)
443 outs() << " abbrevid=" << Entry.ID;
445 for (unsigned i = 0, e = Record.size(); i != e; ++i)
446 outs() << " op" << i << "=" << (int64_t)Record[i];
451 outs() << " blob data = ";
452 bool BlobIsPrintable = true;
453 for (unsigned i = 0, e = Blob.size(); i != e; ++i)
454 if (!isprint(static_cast<unsigned char>(Blob[i]))) {
455 BlobIsPrintable = false;
460 outs() << "'" << Blob << "'";
462 outs() << "unprintable, " << Blob.size() << " bytes.";
470 static void PrintSize(double Bits) {
471 outs() << format("%.2f/%.2fB/%luW", Bits, Bits/8,(unsigned long)(Bits/32));
473 static void PrintSize(uint64_t Bits) {
474 outs() << format("%lub/%.2fB/%luW", (unsigned long)Bits,
475 (double)Bits/8, (unsigned long)(Bits/32));
479 /// AnalyzeBitcode - Analyze the bitcode file specified by InputFilename.
480 static int AnalyzeBitcode() {
481 // Read the input file.
482 OwningPtr<MemoryBuffer> MemBuf;
485 MemoryBuffer::getFileOrSTDIN(InputFilename, MemBuf))
486 return Error("Error reading '" + InputFilename + "': " + ec.message());
488 if (MemBuf->getBufferSize() & 3)
489 return Error("Bitcode stream should be a multiple of 4 bytes in length");
491 const unsigned char *BufPtr = (const unsigned char *)MemBuf->getBufferStart();
492 const unsigned char *EndBufPtr = BufPtr+MemBuf->getBufferSize();
494 // If we have a wrapper header, parse it and ignore the non-bc file contents.
495 // The magic number is 0x0B17C0DE stored in little endian.
496 if (isBitcodeWrapper(BufPtr, EndBufPtr))
497 if (SkipBitcodeWrapperHeader(BufPtr, EndBufPtr, true))
498 return Error("Invalid bitcode wrapper header");
500 BitstreamReader StreamFile(BufPtr, EndBufPtr);
501 BitstreamCursor Stream(StreamFile);
502 StreamFile.CollectBlockInfoNames();
504 // Read the stream signature.
506 Signature[0] = Stream.Read(8);
507 Signature[1] = Stream.Read(8);
508 Signature[2] = Stream.Read(4);
509 Signature[3] = Stream.Read(4);
510 Signature[4] = Stream.Read(4);
511 Signature[5] = Stream.Read(4);
513 // Autodetect the file contents, if it is one we know.
514 CurStreamType = UnknownBitstream;
515 if (Signature[0] == 'B' && Signature[1] == 'C' &&
516 Signature[2] == 0x0 && Signature[3] == 0xC &&
517 Signature[4] == 0xE && Signature[5] == 0xD)
518 CurStreamType = LLVMIRBitstream;
520 unsigned NumTopBlocks = 0;
522 // Parse the top-level structure. We only allow blocks at the top-level.
523 while (!Stream.AtEndOfStream()) {
524 unsigned Code = Stream.ReadCode();
525 if (Code != bitc::ENTER_SUBBLOCK)
526 return Error("Invalid record at top-level");
528 unsigned BlockID = Stream.ReadSubBlockID();
530 if (ParseBlock(Stream, BlockID, 0))
535 if (Dump) outs() << "\n\n";
537 uint64_t BufferSizeBits = (EndBufPtr-BufPtr)*CHAR_BIT;
538 // Print a summary of the read file.
539 outs() << "Summary of " << InputFilename << ":\n";
540 outs() << " Total size: ";
541 PrintSize(BufferSizeBits);
543 outs() << " Stream type: ";
544 switch (CurStreamType) {
545 case UnknownBitstream: outs() << "unknown\n"; break;
546 case LLVMIRBitstream: outs() << "LLVM IR\n"; break;
548 outs() << " # Toplevel Blocks: " << NumTopBlocks << "\n";
551 // Emit per-block stats.
552 outs() << "Per-block Summary:\n";
553 for (std::map<unsigned, PerBlockIDStats>::iterator I = BlockIDStats.begin(),
554 E = BlockIDStats.end(); I != E; ++I) {
555 outs() << " Block ID #" << I->first;
556 if (const char *BlockName = GetBlockName(I->first, StreamFile))
557 outs() << " (" << BlockName << ")";
560 const PerBlockIDStats &Stats = I->second;
561 outs() << " Num Instances: " << Stats.NumInstances << "\n";
562 outs() << " Total Size: ";
563 PrintSize(Stats.NumBits);
565 double pct = (Stats.NumBits * 100.0) / BufferSizeBits;
566 outs() << " Percent of file: " << format("%2.4f%%", pct) << "\n";
567 if (Stats.NumInstances > 1) {
568 outs() << " Average Size: ";
569 PrintSize(Stats.NumBits/(double)Stats.NumInstances);
571 outs() << " Tot/Avg SubBlocks: " << Stats.NumSubBlocks << "/"
572 << Stats.NumSubBlocks/(double)Stats.NumInstances << "\n";
573 outs() << " Tot/Avg Abbrevs: " << Stats.NumAbbrevs << "/"
574 << Stats.NumAbbrevs/(double)Stats.NumInstances << "\n";
575 outs() << " Tot/Avg Records: " << Stats.NumRecords << "/"
576 << Stats.NumRecords/(double)Stats.NumInstances << "\n";
578 outs() << " Num SubBlocks: " << Stats.NumSubBlocks << "\n";
579 outs() << " Num Abbrevs: " << Stats.NumAbbrevs << "\n";
580 outs() << " Num Records: " << Stats.NumRecords << "\n";
582 if (Stats.NumRecords) {
583 double pct = (Stats.NumAbbreviatedRecords * 100.0) / Stats.NumRecords;
584 outs() << " Percent Abbrevs: " << format("%2.4f%%", pct) << "\n";
588 // Print a histogram of the codes we see.
589 if (!NoHistogram && !Stats.CodeFreq.empty()) {
590 std::vector<std::pair<unsigned, unsigned> > FreqPairs; // <freq,code>
591 for (unsigned i = 0, e = Stats.CodeFreq.size(); i != e; ++i)
592 if (unsigned Freq = Stats.CodeFreq[i].NumInstances)
593 FreqPairs.push_back(std::make_pair(Freq, i));
594 std::stable_sort(FreqPairs.begin(), FreqPairs.end());
595 std::reverse(FreqPairs.begin(), FreqPairs.end());
597 outs() << "\tRecord Histogram:\n";
598 outs() << "\t\t Count # Bits %% Abv Record Kind\n";
599 for (unsigned i = 0, e = FreqPairs.size(); i != e; ++i) {
600 const PerRecordStats &RecStats = Stats.CodeFreq[FreqPairs[i].second];
602 outs() << format("\t\t%7d %9lu",
603 RecStats.NumInstances,
604 (unsigned long)RecStats.TotalBits);
606 if (RecStats.NumAbbrev)
609 (double)RecStats.NumAbbrev/RecStats.NumInstances*100);
613 if (const char *CodeName =
614 GetCodeName(FreqPairs[i].second, I->first, StreamFile))
615 outs() << CodeName << "\n";
617 outs() << "UnknownCode" << FreqPairs[i].second << "\n";
627 int main(int argc, char **argv) {
628 // Print a stack trace if we signal out.
629 sys::PrintStackTraceOnErrorSignal();
630 PrettyStackTraceProgram X(argc, argv);
631 llvm_shutdown_obj Y; // Call llvm_shutdown() on exit.
632 cl::ParseCommandLineOptions(argc, argv, "llvm-bcanalyzer file analyzer\n");
634 return AnalyzeBitcode();