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/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/Signals.h"
41 #include "llvm/Support/raw_ostream.h"
42 #include "llvm/Support/system_error.h"
47 static cl::opt<std::string>
48 InputFilename(cl::Positional, cl::desc("<input bitcode>"), cl::init("-"));
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 numeric info in dump even if"
62 " symbolic info is available"));
66 /// CurStreamTypeType - A type for CurStreamType
67 enum CurStreamTypeType {
74 /// CurStreamType - If we can sniff the flavor of this stream, we can produce
76 static CurStreamTypeType CurStreamType;
79 /// GetBlockName - Return a symbolic block name if known, otherwise return
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";
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();
98 if (CurStreamType != LLVMIRBitstream) return 0;
102 case bitc::MODULE_BLOCK_ID: return "MODULE_BLOCK";
103 case bitc::PARAMATTR_BLOCK_ID: return "PARAMATTR_BLOCK";
104 case bitc::TYPE_BLOCK_ID_NEW: return "TYPE_BLOCK_ID";
105 case bitc::CONSTANTS_BLOCK_ID: return "CONSTANTS_BLOCK";
106 case bitc::FUNCTION_BLOCK_ID: return "FUNCTION_BLOCK";
107 case bitc::VALUE_SYMTAB_BLOCK_ID: return "VALUE_SYMTAB";
108 case bitc::METADATA_BLOCK_ID: return "METADATA_BLOCK";
109 case bitc::METADATA_ATTACHMENT_ID: return "METADATA_ATTACHMENT_BLOCK";
110 case bitc::USELIST_BLOCK_ID: return "USELIST_BLOCK_ID";
114 /// GetCodeName - Return a symbolic code name if known, otherwise return
116 static const char *GetCodeName(unsigned CodeID, unsigned BlockID,
117 const BitstreamReader &StreamFile) {
118 // Standard blocks for all bitcode files.
119 if (BlockID < bitc::FIRST_APPLICATION_BLOCKID) {
120 if (BlockID == bitc::BLOCKINFO_BLOCK_ID) {
123 case bitc::BLOCKINFO_CODE_SETBID: return "SETBID";
124 case bitc::BLOCKINFO_CODE_BLOCKNAME: return "BLOCKNAME";
125 case bitc::BLOCKINFO_CODE_SETRECORDNAME: return "SETRECORDNAME";
131 // Check to see if we have a blockinfo record for this record, with a name.
132 if (const BitstreamReader::BlockInfo *Info =
133 StreamFile.getBlockInfo(BlockID)) {
134 for (unsigned i = 0, e = Info->RecordNames.size(); i != e; ++i)
135 if (Info->RecordNames[i].first == CodeID)
136 return Info->RecordNames[i].second.c_str();
140 if (CurStreamType != LLVMIRBitstream) return 0;
144 case bitc::MODULE_BLOCK_ID:
147 case bitc::MODULE_CODE_VERSION: return "VERSION";
148 case bitc::MODULE_CODE_TRIPLE: return "TRIPLE";
149 case bitc::MODULE_CODE_DATALAYOUT: return "DATALAYOUT";
150 case bitc::MODULE_CODE_ASM: return "ASM";
151 case bitc::MODULE_CODE_SECTIONNAME: return "SECTIONNAME";
152 case bitc::MODULE_CODE_DEPLIB: return "DEPLIB"; // FIXME: Remove in 4.0
153 case bitc::MODULE_CODE_GLOBALVAR: return "GLOBALVAR";
154 case bitc::MODULE_CODE_FUNCTION: return "FUNCTION";
155 case bitc::MODULE_CODE_ALIAS: return "ALIAS";
156 case bitc::MODULE_CODE_PURGEVALS: return "PURGEVALS";
157 case bitc::MODULE_CODE_GCNAME: return "GCNAME";
159 case bitc::PARAMATTR_BLOCK_ID:
162 case bitc::PARAMATTR_CODE_ENTRY: return "ENTRY";
164 case bitc::TYPE_BLOCK_ID_NEW:
167 case bitc::TYPE_CODE_NUMENTRY: return "NUMENTRY";
168 case bitc::TYPE_CODE_VOID: return "VOID";
169 case bitc::TYPE_CODE_FLOAT: return "FLOAT";
170 case bitc::TYPE_CODE_DOUBLE: return "DOUBLE";
171 case bitc::TYPE_CODE_LABEL: return "LABEL";
172 case bitc::TYPE_CODE_OPAQUE: return "OPAQUE";
173 case bitc::TYPE_CODE_INTEGER: return "INTEGER";
174 case bitc::TYPE_CODE_POINTER: return "POINTER";
175 case bitc::TYPE_CODE_ARRAY: return "ARRAY";
176 case bitc::TYPE_CODE_VECTOR: return "VECTOR";
177 case bitc::TYPE_CODE_X86_FP80: return "X86_FP80";
178 case bitc::TYPE_CODE_FP128: return "FP128";
179 case bitc::TYPE_CODE_PPC_FP128: return "PPC_FP128";
180 case bitc::TYPE_CODE_METADATA: return "METADATA";
181 case bitc::TYPE_CODE_STRUCT_ANON: return "STRUCT_ANON";
182 case bitc::TYPE_CODE_STRUCT_NAME: return "STRUCT_NAME";
183 case bitc::TYPE_CODE_STRUCT_NAMED: return "STRUCT_NAMED";
184 case bitc::TYPE_CODE_FUNCTION: return "FUNCTION";
187 case bitc::CONSTANTS_BLOCK_ID:
190 case bitc::CST_CODE_SETTYPE: return "SETTYPE";
191 case bitc::CST_CODE_NULL: return "NULL";
192 case bitc::CST_CODE_UNDEF: return "UNDEF";
193 case bitc::CST_CODE_INTEGER: return "INTEGER";
194 case bitc::CST_CODE_WIDE_INTEGER: return "WIDE_INTEGER";
195 case bitc::CST_CODE_FLOAT: return "FLOAT";
196 case bitc::CST_CODE_AGGREGATE: return "AGGREGATE";
197 case bitc::CST_CODE_STRING: return "STRING";
198 case bitc::CST_CODE_CSTRING: return "CSTRING";
199 case bitc::CST_CODE_CE_BINOP: return "CE_BINOP";
200 case bitc::CST_CODE_CE_CAST: return "CE_CAST";
201 case bitc::CST_CODE_CE_GEP: return "CE_GEP";
202 case bitc::CST_CODE_CE_INBOUNDS_GEP: return "CE_INBOUNDS_GEP";
203 case bitc::CST_CODE_CE_SELECT: return "CE_SELECT";
204 case bitc::CST_CODE_CE_EXTRACTELT: return "CE_EXTRACTELT";
205 case bitc::CST_CODE_CE_INSERTELT: return "CE_INSERTELT";
206 case bitc::CST_CODE_CE_SHUFFLEVEC: return "CE_SHUFFLEVEC";
207 case bitc::CST_CODE_CE_CMP: return "CE_CMP";
208 case bitc::CST_CODE_INLINEASM: return "INLINEASM";
209 case bitc::CST_CODE_CE_SHUFVEC_EX: return "CE_SHUFVEC_EX";
210 case bitc::CST_CODE_BLOCKADDRESS: return "CST_CODE_BLOCKADDRESS";
211 case bitc::CST_CODE_DATA: return "DATA";
213 case bitc::FUNCTION_BLOCK_ID:
216 case bitc::FUNC_CODE_DECLAREBLOCKS: return "DECLAREBLOCKS";
218 case bitc::FUNC_CODE_INST_BINOP: return "INST_BINOP";
219 case bitc::FUNC_CODE_INST_CAST: return "INST_CAST";
220 case bitc::FUNC_CODE_INST_GEP: return "INST_GEP";
221 case bitc::FUNC_CODE_INST_INBOUNDS_GEP: return "INST_INBOUNDS_GEP";
222 case bitc::FUNC_CODE_INST_SELECT: return "INST_SELECT";
223 case bitc::FUNC_CODE_INST_EXTRACTELT: return "INST_EXTRACTELT";
224 case bitc::FUNC_CODE_INST_INSERTELT: return "INST_INSERTELT";
225 case bitc::FUNC_CODE_INST_SHUFFLEVEC: return "INST_SHUFFLEVEC";
226 case bitc::FUNC_CODE_INST_CMP: return "INST_CMP";
228 case bitc::FUNC_CODE_INST_RET: return "INST_RET";
229 case bitc::FUNC_CODE_INST_BR: return "INST_BR";
230 case bitc::FUNC_CODE_INST_SWITCH: return "INST_SWITCH";
231 case bitc::FUNC_CODE_INST_INVOKE: return "INST_INVOKE";
232 case bitc::FUNC_CODE_INST_UNREACHABLE: return "INST_UNREACHABLE";
234 case bitc::FUNC_CODE_INST_PHI: return "INST_PHI";
235 case bitc::FUNC_CODE_INST_ALLOCA: return "INST_ALLOCA";
236 case bitc::FUNC_CODE_INST_LOAD: return "INST_LOAD";
237 case bitc::FUNC_CODE_INST_VAARG: return "INST_VAARG";
238 case bitc::FUNC_CODE_INST_STORE: return "INST_STORE";
239 case bitc::FUNC_CODE_INST_EXTRACTVAL: return "INST_EXTRACTVAL";
240 case bitc::FUNC_CODE_INST_INSERTVAL: return "INST_INSERTVAL";
241 case bitc::FUNC_CODE_INST_CMP2: return "INST_CMP2";
242 case bitc::FUNC_CODE_INST_VSELECT: return "INST_VSELECT";
243 case bitc::FUNC_CODE_DEBUG_LOC_AGAIN: return "DEBUG_LOC_AGAIN";
244 case bitc::FUNC_CODE_INST_CALL: return "INST_CALL";
245 case bitc::FUNC_CODE_DEBUG_LOC: return "DEBUG_LOC";
247 case bitc::VALUE_SYMTAB_BLOCK_ID:
250 case bitc::VST_CODE_ENTRY: return "ENTRY";
251 case bitc::VST_CODE_BBENTRY: return "BBENTRY";
253 case bitc::METADATA_ATTACHMENT_ID:
256 case bitc::METADATA_ATTACHMENT: return "METADATA_ATTACHMENT";
258 case bitc::METADATA_BLOCK_ID:
261 case bitc::METADATA_STRING: return "METADATA_STRING";
262 case bitc::METADATA_NAME: return "METADATA_NAME";
263 case bitc::METADATA_KIND: return "METADATA_KIND";
264 case bitc::METADATA_NODE: return "METADATA_NODE";
265 case bitc::METADATA_FN_NODE: return "METADATA_FN_NODE";
266 case bitc::METADATA_NAMED_NODE: return "METADATA_NAMED_NODE";
268 case bitc::USELIST_BLOCK_ID:
271 case bitc::USELIST_CODE_ENTRY: return "USELIST_CODE_ENTRY";
276 struct PerRecordStats {
277 unsigned NumInstances;
281 PerRecordStats() : NumInstances(0), NumAbbrev(0), TotalBits(0) {}
284 struct PerBlockIDStats {
285 /// NumInstances - This the number of times this block ID has been seen.
286 unsigned NumInstances;
288 /// NumBits - The total size in bits of all of these blocks.
291 /// NumSubBlocks - The total number of blocks these blocks contain.
292 unsigned NumSubBlocks;
294 /// NumAbbrevs - The total number of abbreviations.
297 /// NumRecords - The total number of records these blocks contain, and the
298 /// number that are abbreviated.
299 unsigned NumRecords, NumAbbreviatedRecords;
301 /// CodeFreq - Keep track of the number of times we see each code.
302 std::vector<PerRecordStats> CodeFreq;
305 : NumInstances(0), NumBits(0),
306 NumSubBlocks(0), NumAbbrevs(0), NumRecords(0), NumAbbreviatedRecords(0) {}
309 static std::map<unsigned, PerBlockIDStats> BlockIDStats;
313 /// Error - All bitcode analysis errors go through this function, making this a
314 /// good place to breakpoint if debugging.
315 static bool Error(const std::string &Err) {
316 errs() << Err << "\n";
320 /// ParseBlock - Read a block, updating statistics, etc.
321 static bool ParseBlock(BitstreamCursor &Stream, unsigned BlockID,
322 unsigned IndentLevel) {
323 std::string Indent(IndentLevel*2, ' ');
324 uint64_t BlockBitStart = Stream.GetCurrentBitNo();
326 // Get the statistics for this BlockID.
327 PerBlockIDStats &BlockStats = BlockIDStats[BlockID];
329 BlockStats.NumInstances++;
331 // BLOCKINFO is a special part of the stream.
332 if (BlockID == bitc::BLOCKINFO_BLOCK_ID) {
333 if (Dump) outs() << Indent << "<BLOCKINFO_BLOCK/>\n";
334 if (Stream.ReadBlockInfoBlock())
335 return Error("Malformed BlockInfoBlock");
336 uint64_t BlockBitEnd = Stream.GetCurrentBitNo();
337 BlockStats.NumBits += BlockBitEnd-BlockBitStart;
341 unsigned NumWords = 0;
342 if (Stream.EnterSubBlock(BlockID, &NumWords))
343 return Error("Malformed block record");
345 const char *BlockName = 0;
347 outs() << Indent << "<";
348 if ((BlockName = GetBlockName(BlockID, *Stream.getBitStreamReader())))
351 outs() << "UnknownBlock" << BlockID;
353 if (NonSymbolic && BlockName)
354 outs() << " BlockID=" << BlockID;
356 outs() << " NumWords=" << NumWords
357 << " BlockCodeSize=" << Stream.getAbbrevIDWidth() << ">\n";
360 SmallVector<uint64_t, 64> Record;
362 // Read all the records for this block.
364 if (Stream.AtEndOfStream())
365 return Error("Premature end of bitstream");
367 uint64_t RecordStartBit = Stream.GetCurrentBitNo();
369 BitstreamEntry Entry =
370 Stream.advance(BitstreamCursor::AF_DontAutoprocessAbbrevs);
372 switch (Entry.Kind) {
373 case BitstreamEntry::Error:
374 return Error("malformed bitcode file");
375 case BitstreamEntry::EndBlock: {
376 uint64_t BlockBitEnd = Stream.GetCurrentBitNo();
377 BlockStats.NumBits += BlockBitEnd-BlockBitStart;
379 outs() << Indent << "</";
381 outs() << BlockName << ">\n";
383 outs() << "UnknownBlock" << BlockID << ">\n";
388 case BitstreamEntry::SubBlock: {
389 uint64_t SubBlockBitStart = Stream.GetCurrentBitNo();
390 if (ParseBlock(Stream, Entry.ID, IndentLevel+1))
392 ++BlockStats.NumSubBlocks;
393 uint64_t SubBlockBitEnd = Stream.GetCurrentBitNo();
395 // Don't include subblock sizes in the size of this block.
396 BlockBitStart += SubBlockBitEnd-SubBlockBitStart;
399 case BitstreamEntry::Record:
400 // The interesting case.
404 if (Entry.ID == bitc::DEFINE_ABBREV) {
405 Stream.ReadAbbrevRecord();
406 ++BlockStats.NumAbbrevs;
412 ++BlockStats.NumRecords;
415 unsigned Code = Stream.readRecord(Entry.ID, Record, &Blob);
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 (Entry.ID != bitc::UNABBREV_RECORD) {
424 BlockStats.CodeFreq[Code].NumAbbrev++;
425 ++BlockStats.NumAbbreviatedRecords;
429 outs() << Indent << " <";
430 if (const char *CodeName =
431 GetCodeName(Code, BlockID, *Stream.getBitStreamReader()))
434 outs() << "UnknownCode" << Code;
436 GetCodeName(Code, BlockID, *Stream.getBitStreamReader()))
437 outs() << " codeid=" << Code;
438 if (Entry.ID != bitc::UNABBREV_RECORD)
439 outs() << " abbrevid=" << Entry.ID;
441 for (unsigned i = 0, e = Record.size(); i != e; ++i)
442 outs() << " op" << i << "=" << (int64_t)Record[i];
447 outs() << " blob data = ";
448 bool BlobIsPrintable = true;
449 for (unsigned i = 0, e = Blob.size(); i != e; ++i)
450 if (!isprint(Blob[i])) {
451 BlobIsPrintable = false;
456 outs() << "'" << Blob << "'";
458 outs() << "unprintable, " << Blob.size() << " bytes.";
466 static void PrintSize(double Bits) {
467 outs() << format("%.2f/%.2fB/%luW", Bits, Bits/8,(unsigned long)(Bits/32));
469 static void PrintSize(uint64_t Bits) {
470 outs() << format("%lub/%.2fB/%luW", (unsigned long)Bits,
471 (double)Bits/8, (unsigned long)(Bits/32));
475 /// AnalyzeBitcode - Analyze the bitcode file specified by InputFilename.
476 static int AnalyzeBitcode() {
477 // Read the input file.
478 OwningPtr<MemoryBuffer> MemBuf;
481 MemoryBuffer::getFileOrSTDIN(InputFilename.c_str(), MemBuf))
482 return Error("Error reading '" + InputFilename + "': " + ec.message());
484 if (MemBuf->getBufferSize() & 3)
485 return Error("Bitcode stream should be a multiple of 4 bytes in length");
487 const unsigned char *BufPtr = (const unsigned char *)MemBuf->getBufferStart();
488 const unsigned char *EndBufPtr = BufPtr+MemBuf->getBufferSize();
490 // If we have a wrapper header, parse it and ignore the non-bc file contents.
491 // The magic number is 0x0B17C0DE stored in little endian.
492 if (isBitcodeWrapper(BufPtr, EndBufPtr))
493 if (SkipBitcodeWrapperHeader(BufPtr, EndBufPtr, true))
494 return Error("Invalid bitcode wrapper header");
496 BitstreamReader StreamFile(BufPtr, EndBufPtr);
497 BitstreamCursor Stream(StreamFile);
498 StreamFile.CollectBlockInfoNames();
500 // Read the stream signature.
502 Signature[0] = Stream.Read(8);
503 Signature[1] = Stream.Read(8);
504 Signature[2] = Stream.Read(4);
505 Signature[3] = Stream.Read(4);
506 Signature[4] = Stream.Read(4);
507 Signature[5] = Stream.Read(4);
509 // Autodetect the file contents, if it is one we know.
510 CurStreamType = UnknownBitstream;
511 if (Signature[0] == 'B' && Signature[1] == 'C' &&
512 Signature[2] == 0x0 && Signature[3] == 0xC &&
513 Signature[4] == 0xE && Signature[5] == 0xD)
514 CurStreamType = LLVMIRBitstream;
516 unsigned NumTopBlocks = 0;
518 // Parse the top-level structure. We only allow blocks at the top-level.
519 while (!Stream.AtEndOfStream()) {
520 unsigned Code = Stream.ReadCode();
521 if (Code != bitc::ENTER_SUBBLOCK)
522 return Error("Invalid record at top-level");
524 unsigned BlockID = Stream.ReadSubBlockID();
526 if (ParseBlock(Stream, BlockID, 0))
531 if (Dump) outs() << "\n\n";
533 uint64_t BufferSizeBits = (EndBufPtr-BufPtr)*CHAR_BIT;
534 // Print a summary of the read file.
535 outs() << "Summary of " << InputFilename << ":\n";
536 outs() << " Total size: ";
537 PrintSize(BufferSizeBits);
539 outs() << " Stream type: ";
540 switch (CurStreamType) {
541 case UnknownBitstream: outs() << "unknown\n"; break;
542 case LLVMIRBitstream: outs() << "LLVM IR\n"; break;
544 outs() << " # Toplevel Blocks: " << NumTopBlocks << "\n";
547 // Emit per-block stats.
548 outs() << "Per-block Summary:\n";
549 for (std::map<unsigned, PerBlockIDStats>::iterator I = BlockIDStats.begin(),
550 E = BlockIDStats.end(); I != E; ++I) {
551 outs() << " Block ID #" << I->first;
552 if (const char *BlockName = GetBlockName(I->first, StreamFile))
553 outs() << " (" << BlockName << ")";
556 const PerBlockIDStats &Stats = I->second;
557 outs() << " Num Instances: " << Stats.NumInstances << "\n";
558 outs() << " Total Size: ";
559 PrintSize(Stats.NumBits);
561 double pct = (Stats.NumBits * 100.0) / BufferSizeBits;
562 outs() << " Percent of file: " << format("%2.4f%%", pct) << "\n";
563 if (Stats.NumInstances > 1) {
564 outs() << " Average Size: ";
565 PrintSize(Stats.NumBits/(double)Stats.NumInstances);
567 outs() << " Tot/Avg SubBlocks: " << Stats.NumSubBlocks << "/"
568 << Stats.NumSubBlocks/(double)Stats.NumInstances << "\n";
569 outs() << " Tot/Avg Abbrevs: " << Stats.NumAbbrevs << "/"
570 << Stats.NumAbbrevs/(double)Stats.NumInstances << "\n";
571 outs() << " Tot/Avg Records: " << Stats.NumRecords << "/"
572 << Stats.NumRecords/(double)Stats.NumInstances << "\n";
574 outs() << " Num SubBlocks: " << Stats.NumSubBlocks << "\n";
575 outs() << " Num Abbrevs: " << Stats.NumAbbrevs << "\n";
576 outs() << " Num Records: " << Stats.NumRecords << "\n";
578 if (Stats.NumRecords) {
579 double pct = (Stats.NumAbbreviatedRecords * 100.0) / Stats.NumRecords;
580 outs() << " Percent Abbrevs: " << format("%2.4f%%", pct) << "\n";
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());
593 outs() << "\tRecord Histogram:\n";
594 outs() << "\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];
598 outs() << format("\t\t%7d %9lu",
599 RecStats.NumInstances,
600 (unsigned long)RecStats.TotalBits);
602 if (RecStats.NumAbbrev)
605 (double)RecStats.NumAbbrev/RecStats.NumInstances*100);
609 if (const char *CodeName =
610 GetCodeName(FreqPairs[i].second, I->first, StreamFile))
611 outs() << CodeName << "\n";
613 outs() << "UnknownCode" << FreqPairs[i].second << "\n";
623 int main(int argc, char **argv) {
624 // Print a stack trace if we signal out.
625 sys::PrintStackTraceOnErrorSignal();
626 PrettyStackTraceProgram X(argc, argv);
627 llvm_shutdown_obj Y; // Call llvm_shutdown() on exit.
628 cl::ParseCommandLineOptions(argc, argv, "llvm-bcanalyzer file analyzer\n");
630 return AnalyzeBitcode();