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/raw_ostream.h"
41 #include "llvm/Support/Signals.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::TYPE_BLOCK_ID: return "TYPE_BLOCK";
106 case bitc::CONSTANTS_BLOCK_ID: return "CONSTANTS_BLOCK";
107 case bitc::FUNCTION_BLOCK_ID: return "FUNCTION_BLOCK";
108 case bitc::TYPE_SYMTAB_BLOCK_ID: return "TYPE_SYMTAB";
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";
115 /// GetCodeName - Return a symbolic code name if known, otherwise return
117 static const char *GetCodeName(unsigned CodeID, unsigned BlockID,
118 const BitstreamReader &StreamFile) {
119 // Standard blocks for all bitcode files.
120 if (BlockID < bitc::FIRST_APPLICATION_BLOCKID) {
121 if (BlockID == bitc::BLOCKINFO_BLOCK_ID) {
124 case bitc::BLOCKINFO_CODE_SETBID: return "SETBID";
125 case bitc::BLOCKINFO_CODE_BLOCKNAME: return "BLOCKNAME";
126 case bitc::BLOCKINFO_CODE_SETRECORDNAME: return "SETRECORDNAME";
132 // Check to see if we have a blockinfo record for this record, with a name.
133 if (const BitstreamReader::BlockInfo *Info =
134 StreamFile.getBlockInfo(BlockID)) {
135 for (unsigned i = 0, e = Info->RecordNames.size(); i != e; ++i)
136 if (Info->RecordNames[i].first == CodeID)
137 return Info->RecordNames[i].second.c_str();
141 if (CurStreamType != LLVMIRBitstream) return 0;
145 case bitc::MODULE_BLOCK_ID:
148 case bitc::MODULE_CODE_VERSION: return "VERSION";
149 case bitc::MODULE_CODE_TRIPLE: return "TRIPLE";
150 case bitc::MODULE_CODE_DATALAYOUT: return "DATALAYOUT";
151 case bitc::MODULE_CODE_ASM: return "ASM";
152 case bitc::MODULE_CODE_SECTIONNAME: return "SECTIONNAME";
153 case bitc::MODULE_CODE_DEPLIB: return "DEPLIB";
154 case bitc::MODULE_CODE_GLOBALVAR: return "GLOBALVAR";
155 case bitc::MODULE_CODE_FUNCTION: return "FUNCTION";
156 case bitc::MODULE_CODE_ALIAS: return "ALIAS";
157 case bitc::MODULE_CODE_PURGEVALS: return "PURGEVALS";
158 case bitc::MODULE_CODE_GCNAME: return "GCNAME";
160 case bitc::PARAMATTR_BLOCK_ID:
163 case bitc::PARAMATTR_CODE_ENTRY: return "ENTRY";
165 case bitc::TYPE_BLOCK_ID:
168 case bitc::TYPE_CODE_NUMENTRY: return "NUMENTRY";
169 case bitc::TYPE_CODE_VOID: return "VOID";
170 case bitc::TYPE_CODE_FLOAT: return "FLOAT";
171 case bitc::TYPE_CODE_DOUBLE: return "DOUBLE";
172 case bitc::TYPE_CODE_LABEL: return "LABEL";
173 case bitc::TYPE_CODE_OPAQUE: return "OPAQUE";
174 case bitc::TYPE_CODE_INTEGER: return "INTEGER";
175 case bitc::TYPE_CODE_POINTER: return "POINTER";
176 case bitc::TYPE_CODE_FUNCTION: return "FUNCTION";
177 case bitc::TYPE_CODE_STRUCT: return "STRUCT";
178 case bitc::TYPE_CODE_ARRAY: return "ARRAY";
179 case bitc::TYPE_CODE_VECTOR: return "VECTOR";
180 case bitc::TYPE_CODE_X86_FP80: return "X86_FP80";
181 case bitc::TYPE_CODE_FP128: return "FP128";
182 case bitc::TYPE_CODE_PPC_FP128: return "PPC_FP128";
183 case bitc::TYPE_CODE_METADATA: return "METADATA";
186 case bitc::CONSTANTS_BLOCK_ID:
189 case bitc::CST_CODE_SETTYPE: return "SETTYPE";
190 case bitc::CST_CODE_NULL: return "NULL";
191 case bitc::CST_CODE_UNDEF: return "UNDEF";
192 case bitc::CST_CODE_INTEGER: return "INTEGER";
193 case bitc::CST_CODE_WIDE_INTEGER: return "WIDE_INTEGER";
194 case bitc::CST_CODE_FLOAT: return "FLOAT";
195 case bitc::CST_CODE_AGGREGATE: return "AGGREGATE";
196 case bitc::CST_CODE_STRING: return "STRING";
197 case bitc::CST_CODE_CSTRING: return "CSTRING";
198 case bitc::CST_CODE_CE_BINOP: return "CE_BINOP";
199 case bitc::CST_CODE_CE_CAST: return "CE_CAST";
200 case bitc::CST_CODE_CE_GEP: return "CE_GEP";
201 case bitc::CST_CODE_CE_INBOUNDS_GEP: return "CE_INBOUNDS_GEP";
202 case bitc::CST_CODE_CE_SELECT: return "CE_SELECT";
203 case bitc::CST_CODE_CE_EXTRACTELT: return "CE_EXTRACTELT";
204 case bitc::CST_CODE_CE_INSERTELT: return "CE_INSERTELT";
205 case bitc::CST_CODE_CE_SHUFFLEVEC: return "CE_SHUFFLEVEC";
206 case bitc::CST_CODE_CE_CMP: return "CE_CMP";
207 case bitc::CST_CODE_INLINEASM: return "INLINEASM";
208 case bitc::CST_CODE_CE_SHUFVEC_EX: return "CE_SHUFVEC_EX";
210 case bitc::FUNCTION_BLOCK_ID:
213 case bitc::FUNC_CODE_DECLAREBLOCKS: return "DECLAREBLOCKS";
215 case bitc::FUNC_CODE_INST_BINOP: return "INST_BINOP";
216 case bitc::FUNC_CODE_INST_CAST: return "INST_CAST";
217 case bitc::FUNC_CODE_INST_GEP: return "INST_GEP";
218 case bitc::FUNC_CODE_INST_INBOUNDS_GEP: return "INST_INBOUNDS_GEP";
219 case bitc::FUNC_CODE_INST_SELECT: return "INST_SELECT";
220 case bitc::FUNC_CODE_INST_EXTRACTELT: return "INST_EXTRACTELT";
221 case bitc::FUNC_CODE_INST_INSERTELT: return "INST_INSERTELT";
222 case bitc::FUNC_CODE_INST_SHUFFLEVEC: return "INST_SHUFFLEVEC";
223 case bitc::FUNC_CODE_INST_CMP: return "INST_CMP";
225 case bitc::FUNC_CODE_INST_RET: return "INST_RET";
226 case bitc::FUNC_CODE_INST_BR: return "INST_BR";
227 case bitc::FUNC_CODE_INST_SWITCH: return "INST_SWITCH";
228 case bitc::FUNC_CODE_INST_INVOKE: return "INST_INVOKE";
229 case bitc::FUNC_CODE_INST_UNWIND: return "INST_UNWIND";
230 case bitc::FUNC_CODE_INST_UNREACHABLE: return "INST_UNREACHABLE";
232 case bitc::FUNC_CODE_INST_PHI: return "INST_PHI";
233 case bitc::FUNC_CODE_INST_MALLOC: return "INST_MALLOC";
234 case bitc::FUNC_CODE_INST_FREE: return "INST_FREE";
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_STORE: return "INST_STORE";
238 case bitc::FUNC_CODE_INST_CALL: return "INST_CALL";
239 case bitc::FUNC_CODE_INST_VAARG: return "INST_VAARG";
240 case bitc::FUNC_CODE_INST_STORE2: return "INST_STORE2";
241 case bitc::FUNC_CODE_INST_GETRESULT: return "INST_GETRESULT";
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: return "DEBUG_LOC";
247 case bitc::FUNC_CODE_DEBUG_LOC_AGAIN: return "DEBUG_LOC_AGAIN";
248 case bitc::FUNC_CODE_INST_CALL2: return "INST_CALL2";
249 case bitc::FUNC_CODE_DEBUG_LOC2: return "DEBUG_LOC2";
251 case bitc::TYPE_SYMTAB_BLOCK_ID:
254 case bitc::TST_CODE_ENTRY: return "ENTRY";
256 case bitc::VALUE_SYMTAB_BLOCK_ID:
259 case bitc::VST_CODE_ENTRY: return "ENTRY";
260 case bitc::VST_CODE_BBENTRY: return "BBENTRY";
262 case bitc::METADATA_ATTACHMENT_ID:
265 case bitc::METADATA_ATTACHMENT2: return "METADATA_ATTACHMENT2";
267 case bitc::METADATA_BLOCK_ID:
270 case bitc::METADATA_STRING: return "METADATA_STRING";
271 case bitc::METADATA_NAME: return "METADATA_NAME";
272 case bitc::METADATA_KIND: return "METADATA_KIND";
273 case bitc::METADATA_NODE2: return "METADATA_NODE2";
274 case bitc::METADATA_FN_NODE2: return "METADATA_FN_NODE2";
275 case bitc::METADATA_NAMED_NODE2: return "METADATA_NAMED_NODE2";
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 IndentLevel) {
326 std::string Indent(IndentLevel*2, ' ');
327 uint64_t BlockBitStart = Stream.GetCurrentBitNo();
328 unsigned BlockID = Stream.ReadSubBlockID();
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) errs() << 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 errs() << Indent << "<";
352 if ((BlockName = GetBlockName(BlockID, *Stream.getBitStreamReader())))
355 errs() << "UnknownBlock" << BlockID;
357 if (NonSymbolic && BlockName)
358 errs() << " BlockID=" << BlockID;
360 errs() << " 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 // Read the code for this record.
374 unsigned AbbrevID = Stream.ReadCode();
376 case bitc::END_BLOCK: {
377 if (Stream.ReadBlockEnd())
378 return Error("Error at end of block");
379 uint64_t BlockBitEnd = Stream.GetCurrentBitNo();
380 BlockStats.NumBits += BlockBitEnd-BlockBitStart;
382 errs() << Indent << "</";
384 errs() << BlockName << ">\n";
386 errs() << "UnknownBlock" << BlockID << ">\n";
390 case bitc::ENTER_SUBBLOCK: {
391 uint64_t SubBlockBitStart = Stream.GetCurrentBitNo();
392 if (ParseBlock(Stream, IndentLevel+1))
394 ++BlockStats.NumSubBlocks;
395 uint64_t SubBlockBitEnd = Stream.GetCurrentBitNo();
397 // Don't include subblock sizes in the size of this block.
398 BlockBitStart += SubBlockBitEnd-SubBlockBitStart;
401 case bitc::DEFINE_ABBREV:
402 Stream.ReadAbbrevRecord();
403 ++BlockStats.NumAbbrevs;
408 ++BlockStats.NumRecords;
409 if (AbbrevID != bitc::UNABBREV_RECORD)
410 ++BlockStats.NumAbbreviatedRecords;
412 const char *BlobStart = 0;
413 unsigned BlobLen = 0;
414 unsigned Code = Stream.ReadRecord(AbbrevID, Record, BlobStart, BlobLen);
418 // Increment the # occurrences of this code.
419 if (BlockStats.CodeFreq.size() <= Code)
420 BlockStats.CodeFreq.resize(Code+1);
421 BlockStats.CodeFreq[Code].NumInstances++;
422 BlockStats.CodeFreq[Code].TotalBits +=
423 Stream.GetCurrentBitNo()-RecordStartBit;
424 if (AbbrevID != bitc::UNABBREV_RECORD)
425 BlockStats.CodeFreq[Code].NumAbbrev++;
428 errs() << Indent << " <";
429 if (const char *CodeName =
430 GetCodeName(Code, BlockID, *Stream.getBitStreamReader()))
433 errs() << "UnknownCode" << Code;
435 GetCodeName(Code, BlockID, *Stream.getBitStreamReader()))
436 errs() << " codeid=" << Code;
437 if (AbbrevID != bitc::UNABBREV_RECORD)
438 errs() << " abbrevid=" << AbbrevID;
440 for (unsigned i = 0, e = Record.size(); i != e; ++i)
441 errs() << " op" << i << "=" << (int64_t)Record[i];
446 errs() << " blob data = ";
447 bool BlobIsPrintable = true;
448 for (unsigned i = 0; i != BlobLen; ++i)
449 if (!isprint(BlobStart[i])) {
450 BlobIsPrintable = false;
455 errs() << "'" << std::string(BlobStart, BlobStart+BlobLen) <<"'";
457 errs() << "unprintable, " << BlobLen << " bytes.";
468 static void PrintSize(double Bits) {
469 fprintf(stderr, "%.2f/%.2fB/%luW", Bits, Bits/8,(unsigned long)(Bits/32));
471 static void PrintSize(uint64_t Bits) {
472 fprintf(stderr, "%lub/%.2fB/%luW", (unsigned long)Bits,
473 (double)Bits/8, (unsigned long)(Bits/32));
477 /// AnalyzeBitcode - Analyze the bitcode file specified by InputFilename.
478 static int AnalyzeBitcode() {
479 // Read the input file.
480 OwningPtr<MemoryBuffer> MemBuf;
483 MemoryBuffer::getFileOrSTDIN(InputFilename.c_str(), MemBuf))
484 return Error("Error reading '" + InputFilename + "': " + ec.message());
486 if (MemBuf->getBufferSize() & 3)
487 return Error("Bitcode stream should be a multiple of 4 bytes in length");
489 unsigned char *BufPtr = (unsigned char *)MemBuf->getBufferStart();
490 unsigned char *EndBufPtr = BufPtr+MemBuf->getBufferSize();
492 // If we have a wrapper header, parse it and ignore the non-bc file contents.
493 // The magic number is 0x0B17C0DE stored in little endian.
494 if (isBitcodeWrapper(BufPtr, EndBufPtr))
495 if (SkipBitcodeWrapperHeader(BufPtr, EndBufPtr))
496 return Error("Invalid bitcode wrapper header");
498 BitstreamReader StreamFile(BufPtr, EndBufPtr);
499 BitstreamCursor Stream(StreamFile);
500 StreamFile.CollectBlockInfoNames();
502 // Read the stream signature.
504 Signature[0] = Stream.Read(8);
505 Signature[1] = Stream.Read(8);
506 Signature[2] = Stream.Read(4);
507 Signature[3] = Stream.Read(4);
508 Signature[4] = Stream.Read(4);
509 Signature[5] = Stream.Read(4);
511 // Autodetect the file contents, if it is one we know.
512 CurStreamType = UnknownBitstream;
513 if (Signature[0] == 'B' && Signature[1] == 'C' &&
514 Signature[2] == 0x0 && Signature[3] == 0xC &&
515 Signature[4] == 0xE && Signature[5] == 0xD)
516 CurStreamType = LLVMIRBitstream;
518 unsigned NumTopBlocks = 0;
520 // Parse the top-level structure. We only allow blocks at the top-level.
521 while (!Stream.AtEndOfStream()) {
522 unsigned Code = Stream.ReadCode();
523 if (Code != bitc::ENTER_SUBBLOCK)
524 return Error("Invalid record at top-level");
526 if (ParseBlock(Stream, 0))
531 if (Dump) errs() << "\n\n";
533 uint64_t BufferSizeBits = (EndBufPtr-BufPtr)*CHAR_BIT;
534 // Print a summary of the read file.
535 errs() << "Summary of " << InputFilename << ":\n";
536 errs() << " Total size: ";
537 PrintSize(BufferSizeBits);
539 errs() << " Stream type: ";
540 switch (CurStreamType) {
541 default: assert(0 && "Unknown bitstream type");
542 case UnknownBitstream: errs() << "unknown\n"; break;
543 case LLVMIRBitstream: errs() << "LLVM IR\n"; break;
545 errs() << " # Toplevel Blocks: " << NumTopBlocks << "\n";
548 // Emit per-block stats.
549 errs() << "Per-block Summary:\n";
550 for (std::map<unsigned, PerBlockIDStats>::iterator I = BlockIDStats.begin(),
551 E = BlockIDStats.end(); I != E; ++I) {
552 errs() << " Block ID #" << I->first;
553 if (const char *BlockName = GetBlockName(I->first, StreamFile))
554 errs() << " (" << BlockName << ")";
557 const PerBlockIDStats &Stats = I->second;
558 errs() << " Num Instances: " << Stats.NumInstances << "\n";
559 errs() << " Total Size: ";
560 PrintSize(Stats.NumBits);
562 double pct = (Stats.NumBits * 100.0) / BufferSizeBits;
563 errs() << " Percent of file: " << format("%2.4f%%", pct) << "\n";
564 if (Stats.NumInstances > 1) {
565 errs() << " Average Size: ";
566 PrintSize(Stats.NumBits/(double)Stats.NumInstances);
568 errs() << " Tot/Avg SubBlocks: " << Stats.NumSubBlocks << "/"
569 << Stats.NumSubBlocks/(double)Stats.NumInstances << "\n";
570 errs() << " Tot/Avg Abbrevs: " << Stats.NumAbbrevs << "/"
571 << Stats.NumAbbrevs/(double)Stats.NumInstances << "\n";
572 errs() << " Tot/Avg Records: " << Stats.NumRecords << "/"
573 << Stats.NumRecords/(double)Stats.NumInstances << "\n";
575 errs() << " Num SubBlocks: " << Stats.NumSubBlocks << "\n";
576 errs() << " Num Abbrevs: " << Stats.NumAbbrevs << "\n";
577 errs() << " Num Records: " << Stats.NumRecords << "\n";
579 if (Stats.NumRecords) {
580 double pct = (Stats.NumAbbreviatedRecords * 100.0) / Stats.NumRecords;
581 errs() << " Percent Abbrevs: " << format("%2.4f%%", pct) << "\n";
585 // Print a histogram of the codes we see.
586 if (!NoHistogram && !Stats.CodeFreq.empty()) {
587 std::vector<std::pair<unsigned, unsigned> > FreqPairs; // <freq,code>
588 for (unsigned i = 0, e = Stats.CodeFreq.size(); i != e; ++i)
589 if (unsigned Freq = Stats.CodeFreq[i].NumInstances)
590 FreqPairs.push_back(std::make_pair(Freq, i));
591 std::stable_sort(FreqPairs.begin(), FreqPairs.end());
592 std::reverse(FreqPairs.begin(), FreqPairs.end());
594 errs() << "\tRecord Histogram:\n";
595 fprintf(stderr, "\t\t Count # Bits %% Abv Record Kind\n");
596 for (unsigned i = 0, e = FreqPairs.size(); i != e; ++i) {
597 const PerRecordStats &RecStats = Stats.CodeFreq[FreqPairs[i].second];
599 fprintf(stderr, "\t\t%7d %9lu ", RecStats.NumInstances,
600 (unsigned long)RecStats.TotalBits);
602 if (RecStats.NumAbbrev)
603 fprintf(stderr, "%7.2f ",
604 (double)RecStats.NumAbbrev/RecStats.NumInstances*100);
606 fprintf(stderr, " ");
608 if (const char *CodeName =
609 GetCodeName(FreqPairs[i].second, I->first, StreamFile))
610 fprintf(stderr, "%s\n", CodeName);
612 fprintf(stderr, "UnknownCode%d\n", FreqPairs[i].second);
622 int main(int argc, char **argv) {
623 // Print a stack trace if we signal out.
624 sys::PrintStackTraceOnErrorSignal();
625 PrettyStackTraceProgram X(argc, argv);
626 llvm_shutdown_obj Y; // Call llvm_shutdown() on exit.
627 cl::ParseCommandLineOptions(argc, argv, "llvm-bcanalyzer file analyzer\n");
629 return AnalyzeBitcode();