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/Support/Signals.h"
41 #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 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";
103 case bitc::METADATA_ATTACHMENT_ID: return "METADATA_ATTACHMENT_BLOCK";
107 /// GetCodeName - Return a symbolic code name if known, otherwise return
109 static const char *GetCodeName(unsigned CodeID, unsigned BlockID,
110 const BitstreamReader &StreamFile) {
111 // Standard blocks for all bitcode files.
112 if (BlockID < bitc::FIRST_APPLICATION_BLOCKID) {
113 if (BlockID == bitc::BLOCKINFO_BLOCK_ID) {
116 case bitc::BLOCKINFO_CODE_SETBID: return "SETBID";
117 case bitc::BLOCKINFO_CODE_BLOCKNAME: return "BLOCKNAME";
118 case bitc::BLOCKINFO_CODE_SETRECORDNAME: return "SETRECORDNAME";
124 // Check to see if we have a blockinfo record for this record, with a name.
125 if (const BitstreamReader::BlockInfo *Info =
126 StreamFile.getBlockInfo(BlockID)) {
127 for (unsigned i = 0, e = Info->RecordNames.size(); i != e; ++i)
128 if (Info->RecordNames[i].first == CodeID)
129 return Info->RecordNames[i].second.c_str();
133 if (CurStreamType != LLVMIRBitstream) return 0;
137 case bitc::MODULE_BLOCK_ID:
140 case bitc::MODULE_CODE_VERSION: return "VERSION";
141 case bitc::MODULE_CODE_TRIPLE: return "TRIPLE";
142 case bitc::MODULE_CODE_DATALAYOUT: return "DATALAYOUT";
143 case bitc::MODULE_CODE_ASM: return "ASM";
144 case bitc::MODULE_CODE_SECTIONNAME: return "SECTIONNAME";
145 case bitc::MODULE_CODE_DEPLIB: return "DEPLIB";
146 case bitc::MODULE_CODE_GLOBALVAR: return "GLOBALVAR";
147 case bitc::MODULE_CODE_FUNCTION: return "FUNCTION";
148 case bitc::MODULE_CODE_ALIAS: return "ALIAS";
149 case bitc::MODULE_CODE_PURGEVALS: return "PURGEVALS";
150 case bitc::MODULE_CODE_GCNAME: return "GCNAME";
152 case bitc::PARAMATTR_BLOCK_ID:
155 case bitc::PARAMATTR_CODE_ENTRY: return "ENTRY";
157 case bitc::TYPE_BLOCK_ID:
160 case bitc::TYPE_CODE_NUMENTRY: return "NUMENTRY";
161 case bitc::TYPE_CODE_VOID: return "VOID";
162 case bitc::TYPE_CODE_FLOAT: return "FLOAT";
163 case bitc::TYPE_CODE_DOUBLE: return "DOUBLE";
164 case bitc::TYPE_CODE_LABEL: return "LABEL";
165 case bitc::TYPE_CODE_OPAQUE: return "OPAQUE";
166 case bitc::TYPE_CODE_INTEGER: return "INTEGER";
167 case bitc::TYPE_CODE_POINTER: return "POINTER";
168 case bitc::TYPE_CODE_FUNCTION: return "FUNCTION";
169 case bitc::TYPE_CODE_STRUCT: return "STRUCT";
170 case bitc::TYPE_CODE_ARRAY: return "ARRAY";
171 case bitc::TYPE_CODE_VECTOR: return "VECTOR";
172 case bitc::TYPE_CODE_X86_FP80: return "X86_FP80";
173 case bitc::TYPE_CODE_FP128: return "FP128";
174 case bitc::TYPE_CODE_PPC_FP128: return "PPC_FP128";
175 case bitc::TYPE_CODE_METADATA: return "METADATA";
178 case bitc::CONSTANTS_BLOCK_ID:
181 case bitc::CST_CODE_SETTYPE: return "SETTYPE";
182 case bitc::CST_CODE_NULL: return "NULL";
183 case bitc::CST_CODE_UNDEF: return "UNDEF";
184 case bitc::CST_CODE_INTEGER: return "INTEGER";
185 case bitc::CST_CODE_WIDE_INTEGER: return "WIDE_INTEGER";
186 case bitc::CST_CODE_FLOAT: return "FLOAT";
187 case bitc::CST_CODE_AGGREGATE: return "AGGREGATE";
188 case bitc::CST_CODE_STRING: return "STRING";
189 case bitc::CST_CODE_CSTRING: return "CSTRING";
190 case bitc::CST_CODE_CE_BINOP: return "CE_BINOP";
191 case bitc::CST_CODE_CE_CAST: return "CE_CAST";
192 case bitc::CST_CODE_CE_GEP: return "CE_GEP";
193 case bitc::CST_CODE_CE_INBOUNDS_GEP: return "CE_INBOUNDS_GEP";
194 case bitc::CST_CODE_CE_SELECT: return "CE_SELECT";
195 case bitc::CST_CODE_CE_EXTRACTELT: return "CE_EXTRACTELT";
196 case bitc::CST_CODE_CE_INSERTELT: return "CE_INSERTELT";
197 case bitc::CST_CODE_CE_SHUFFLEVEC: return "CE_SHUFFLEVEC";
198 case bitc::CST_CODE_CE_CMP: return "CE_CMP";
199 case bitc::CST_CODE_INLINEASM: return "INLINEASM";
200 case bitc::CST_CODE_CE_SHUFVEC_EX: return "CE_SHUFVEC_EX";
202 case bitc::FUNCTION_BLOCK_ID:
205 case bitc::FUNC_CODE_DECLAREBLOCKS: return "DECLAREBLOCKS";
207 case bitc::FUNC_CODE_INST_BINOP: return "INST_BINOP";
208 case bitc::FUNC_CODE_INST_CAST: return "INST_CAST";
209 case bitc::FUNC_CODE_INST_GEP: return "INST_GEP";
210 case bitc::FUNC_CODE_INST_INBOUNDS_GEP: return "INST_INBOUNDS_GEP";
211 case bitc::FUNC_CODE_INST_SELECT: return "INST_SELECT";
212 case bitc::FUNC_CODE_INST_EXTRACTELT: return "INST_EXTRACTELT";
213 case bitc::FUNC_CODE_INST_INSERTELT: return "INST_INSERTELT";
214 case bitc::FUNC_CODE_INST_SHUFFLEVEC: return "INST_SHUFFLEVEC";
215 case bitc::FUNC_CODE_INST_CMP: return "INST_CMP";
217 case bitc::FUNC_CODE_INST_RET: return "INST_RET";
218 case bitc::FUNC_CODE_INST_BR: return "INST_BR";
219 case bitc::FUNC_CODE_INST_SWITCH: return "INST_SWITCH";
220 case bitc::FUNC_CODE_INST_INVOKE: return "INST_INVOKE";
221 case bitc::FUNC_CODE_INST_UNWIND: return "INST_UNWIND";
222 case bitc::FUNC_CODE_INST_UNREACHABLE: return "INST_UNREACHABLE";
224 case bitc::FUNC_CODE_INST_PHI: return "INST_PHI";
225 case bitc::FUNC_CODE_INST_MALLOC: return "INST_MALLOC";
226 case bitc::FUNC_CODE_INST_FREE: return "INST_FREE";
227 case bitc::FUNC_CODE_INST_ALLOCA: return "INST_ALLOCA";
228 case bitc::FUNC_CODE_INST_LOAD: return "INST_LOAD";
229 case bitc::FUNC_CODE_INST_STORE: return "INST_STORE";
230 case bitc::FUNC_CODE_INST_CALL: return "INST_CALL";
231 case bitc::FUNC_CODE_INST_VAARG: return "INST_VAARG";
232 case bitc::FUNC_CODE_INST_STORE2: return "INST_STORE2";
233 case bitc::FUNC_CODE_INST_GETRESULT: return "INST_GETRESULT";
234 case bitc::FUNC_CODE_INST_EXTRACTVAL: return "INST_EXTRACTVAL";
235 case bitc::FUNC_CODE_INST_INSERTVAL: return "INST_INSERTVAL";
236 case bitc::FUNC_CODE_INST_CMP2: return "INST_CMP2";
237 case bitc::FUNC_CODE_INST_VSELECT: return "INST_VSELECT";
238 case bitc::FUNC_CODE_DEBUG_LOC: return "DEBUG_LOC";
239 case bitc::FUNC_CODE_DEBUG_LOC_AGAIN: return "DEBUG_LOC_AGAIN";
240 case bitc::FUNC_CODE_INST_CALL2: return "INST_CALL2";
241 case bitc::FUNC_CODE_DEBUG_LOC2: return "DEBUG_LOC2";
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";
269 case bitc::METADATA_NODE2: return "METADATA_NODE2";
270 case bitc::METADATA_FN_NODE2: return "METADATA_FN_NODE2";
271 case bitc::METADATA_NAMED_NODE2: return "METADATA_NAMED_NODE2";
272 case bitc::METADATA_ATTACHMENT2: return "METADATA_ATTACHMENT2";
277 struct PerRecordStats {
278 unsigned NumInstances;
282 PerRecordStats() : NumInstances(0), NumAbbrev(0), TotalBits(0) {}
285 struct PerBlockIDStats {
286 /// NumInstances - This the number of times this block ID has been seen.
287 unsigned NumInstances;
289 /// NumBits - The total size in bits of all of these blocks.
292 /// NumSubBlocks - The total number of blocks these blocks contain.
293 unsigned NumSubBlocks;
295 /// NumAbbrevs - The total number of abbreviations.
298 /// NumRecords - The total number of records these blocks contain, and the
299 /// number that are abbreviated.
300 unsigned NumRecords, NumAbbreviatedRecords;
302 /// CodeFreq - Keep track of the number of times we see each code.
303 std::vector<PerRecordStats> CodeFreq;
306 : NumInstances(0), NumBits(0),
307 NumSubBlocks(0), NumAbbrevs(0), NumRecords(0), NumAbbreviatedRecords(0) {}
310 static std::map<unsigned, PerBlockIDStats> BlockIDStats;
314 /// Error - All bitcode analysis errors go through this function, making this a
315 /// good place to breakpoint if debugging.
316 static bool Error(const std::string &Err) {
317 errs() << Err << "\n";
321 /// ParseBlock - Read a block, updating statistics, etc.
322 static bool ParseBlock(BitstreamCursor &Stream, unsigned IndentLevel) {
323 std::string Indent(IndentLevel*2, ' ');
324 uint64_t BlockBitStart = Stream.GetCurrentBitNo();
325 unsigned BlockID = Stream.ReadSubBlockID();
327 // Get the statistics for this BlockID.
328 PerBlockIDStats &BlockStats = BlockIDStats[BlockID];
330 BlockStats.NumInstances++;
332 // BLOCKINFO is a special part of the stream.
333 if (BlockID == bitc::BLOCKINFO_BLOCK_ID) {
334 if (Dump) errs() << Indent << "<BLOCKINFO_BLOCK/>\n";
335 if (Stream.ReadBlockInfoBlock())
336 return Error("Malformed BlockInfoBlock");
337 uint64_t BlockBitEnd = Stream.GetCurrentBitNo();
338 BlockStats.NumBits += BlockBitEnd-BlockBitStart;
342 unsigned NumWords = 0;
343 if (Stream.EnterSubBlock(BlockID, &NumWords))
344 return Error("Malformed block record");
346 const char *BlockName = 0;
348 errs() << Indent << "<";
349 if ((BlockName = GetBlockName(BlockID, *Stream.getBitStreamReader())))
352 errs() << "UnknownBlock" << BlockID;
354 if (NonSymbolic && BlockName)
355 errs() << " BlockID=" << BlockID;
357 errs() << " NumWords=" << NumWords
358 << " BlockCodeSize=" << Stream.GetAbbrevIDWidth() << ">\n";
361 SmallVector<uint64_t, 64> Record;
363 // Read all the records for this block.
365 if (Stream.AtEndOfStream())
366 return Error("Premature end of bitstream");
368 uint64_t RecordStartBit = Stream.GetCurrentBitNo();
370 // Read the code for this record.
371 unsigned AbbrevID = Stream.ReadCode();
373 case bitc::END_BLOCK: {
374 if (Stream.ReadBlockEnd())
375 return Error("Error at end of block");
376 uint64_t BlockBitEnd = Stream.GetCurrentBitNo();
377 BlockStats.NumBits += BlockBitEnd-BlockBitStart;
379 errs() << Indent << "</";
381 errs() << BlockName << ">\n";
383 errs() << "UnknownBlock" << BlockID << ">\n";
387 case bitc::ENTER_SUBBLOCK: {
388 uint64_t SubBlockBitStart = Stream.GetCurrentBitNo();
389 if (ParseBlock(Stream, IndentLevel+1))
391 ++BlockStats.NumSubBlocks;
392 uint64_t SubBlockBitEnd = Stream.GetCurrentBitNo();
394 // Don't include subblock sizes in the size of this block.
395 BlockBitStart += SubBlockBitEnd-SubBlockBitStart;
398 case bitc::DEFINE_ABBREV:
399 Stream.ReadAbbrevRecord();
400 ++BlockStats.NumAbbrevs;
405 ++BlockStats.NumRecords;
406 if (AbbrevID != bitc::UNABBREV_RECORD)
407 ++BlockStats.NumAbbreviatedRecords;
409 const char *BlobStart = 0;
410 unsigned BlobLen = 0;
411 unsigned Code = Stream.ReadRecord(AbbrevID, Record, BlobStart, BlobLen);
415 // Increment the # occurrences of this code.
416 if (BlockStats.CodeFreq.size() <= Code)
417 BlockStats.CodeFreq.resize(Code+1);
418 BlockStats.CodeFreq[Code].NumInstances++;
419 BlockStats.CodeFreq[Code].TotalBits +=
420 Stream.GetCurrentBitNo()-RecordStartBit;
421 if (AbbrevID != bitc::UNABBREV_RECORD)
422 BlockStats.CodeFreq[Code].NumAbbrev++;
425 errs() << Indent << " <";
426 if (const char *CodeName =
427 GetCodeName(Code, BlockID, *Stream.getBitStreamReader()))
430 errs() << "UnknownCode" << Code;
432 GetCodeName(Code, BlockID, *Stream.getBitStreamReader()))
433 errs() << " codeid=" << Code;
434 if (AbbrevID != bitc::UNABBREV_RECORD)
435 errs() << " abbrevid=" << AbbrevID;
437 for (unsigned i = 0, e = Record.size(); i != e; ++i)
438 errs() << " op" << i << "=" << (int64_t)Record[i];
443 errs() << " blob data = ";
444 bool BlobIsPrintable = true;
445 for (unsigned i = 0; i != BlobLen; ++i)
446 if (!isprint(BlobStart[i])) {
447 BlobIsPrintable = false;
452 errs() << "'" << std::string(BlobStart, BlobStart+BlobLen) <<"'";
454 errs() << "unprintable, " << BlobLen << " bytes.";
465 static void PrintSize(double Bits) {
466 fprintf(stderr, "%.2f/%.2fB/%lluW", Bits, Bits/8,(unsigned long long)Bits/32);
468 static void PrintSize(uint64_t Bits) {
469 fprintf(stderr, "%llub/%.2fB/%lluW", (unsigned long long)Bits,
470 (double)Bits/8, (unsigned long long)Bits/32);
474 /// AnalyzeBitcode - Analyze the bitcode file specified by InputFilename.
475 static int AnalyzeBitcode() {
476 // Read the input file.
478 MemoryBuffer *MemBuf =
479 MemoryBuffer::getFileOrSTDIN(InputFilename.c_str(), ec);
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 unsigned char *BufPtr = (unsigned char *)MemBuf->getBufferStart();
488 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))
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 if (ParseBlock(Stream, 0))
529 if (Dump) errs() << "\n\n";
531 uint64_t BufferSizeBits = (EndBufPtr-BufPtr)*CHAR_BIT;
532 // Print a summary of the read file.
533 errs() << "Summary of " << InputFilename << ":\n";
534 errs() << " Total size: ";
535 PrintSize(BufferSizeBits);
537 errs() << " Stream type: ";
538 switch (CurStreamType) {
539 default: assert(0 && "Unknown bitstream type");
540 case UnknownBitstream: errs() << "unknown\n"; break;
541 case LLVMIRBitstream: errs() << "LLVM IR\n"; break;
543 errs() << " # Toplevel Blocks: " << NumTopBlocks << "\n";
546 // Emit per-block stats.
547 errs() << "Per-block Summary:\n";
548 for (std::map<unsigned, PerBlockIDStats>::iterator I = BlockIDStats.begin(),
549 E = BlockIDStats.end(); I != E; ++I) {
550 errs() << " Block ID #" << I->first;
551 if (const char *BlockName = GetBlockName(I->first, StreamFile))
552 errs() << " (" << BlockName << ")";
555 const PerBlockIDStats &Stats = I->second;
556 errs() << " Num Instances: " << Stats.NumInstances << "\n";
557 errs() << " Total Size: ";
558 PrintSize(Stats.NumBits);
560 double pct = (Stats.NumBits * 100.0) / BufferSizeBits;
561 errs() << " Percent of file: " << format("%2.4f%%", pct) << "\n";
562 if (Stats.NumInstances > 1) {
563 errs() << " Average Size: ";
564 PrintSize(Stats.NumBits/(double)Stats.NumInstances);
566 errs() << " Tot/Avg SubBlocks: " << Stats.NumSubBlocks << "/"
567 << Stats.NumSubBlocks/(double)Stats.NumInstances << "\n";
568 errs() << " Tot/Avg Abbrevs: " << Stats.NumAbbrevs << "/"
569 << Stats.NumAbbrevs/(double)Stats.NumInstances << "\n";
570 errs() << " Tot/Avg Records: " << Stats.NumRecords << "/"
571 << Stats.NumRecords/(double)Stats.NumInstances << "\n";
573 errs() << " Num SubBlocks: " << Stats.NumSubBlocks << "\n";
574 errs() << " Num Abbrevs: " << Stats.NumAbbrevs << "\n";
575 errs() << " Num Records: " << Stats.NumRecords << "\n";
577 if (Stats.NumRecords) {
578 double pct = (Stats.NumAbbreviatedRecords * 100.0) / Stats.NumRecords;
579 errs() << " Percent Abbrevs: " << format("%2.4f%%", pct) << "\n";
583 // Print a histogram of the codes we see.
584 if (!NoHistogram && !Stats.CodeFreq.empty()) {
585 std::vector<std::pair<unsigned, unsigned> > FreqPairs; // <freq,code>
586 for (unsigned i = 0, e = Stats.CodeFreq.size(); i != e; ++i)
587 if (unsigned Freq = Stats.CodeFreq[i].NumInstances)
588 FreqPairs.push_back(std::make_pair(Freq, i));
589 std::stable_sort(FreqPairs.begin(), FreqPairs.end());
590 std::reverse(FreqPairs.begin(), FreqPairs.end());
592 errs() << "\tRecord Histogram:\n";
593 fprintf(stderr, "\t\t Count # Bits %% Abv Record Kind\n");
594 for (unsigned i = 0, e = FreqPairs.size(); i != e; ++i) {
595 const PerRecordStats &RecStats = Stats.CodeFreq[FreqPairs[i].second];
597 fprintf(stderr, "\t\t%7d %9llu ", RecStats.NumInstances,
598 (unsigned long long)RecStats.TotalBits);
600 if (RecStats.NumAbbrev)
601 fprintf(stderr, "%7.2f ",
602 (double)RecStats.NumAbbrev/RecStats.NumInstances*100);
604 fprintf(stderr, " ");
606 if (const char *CodeName =
607 GetCodeName(FreqPairs[i].second, I->first, StreamFile))
608 fprintf(stderr, "%s\n", CodeName);
610 fprintf(stderr, "UnknownCode%d\n", FreqPairs[i].second);
620 int main(int argc, char **argv) {
621 // Print a stack trace if we signal out.
622 sys::PrintStackTraceOnErrorSignal();
623 PrettyStackTraceProgram X(argc, argv);
624 llvm_shutdown_obj Y; // Call llvm_shutdown() on exit.
625 cl::ParseCommandLineOptions(argc, argv, "llvm-bcanalyzer file analyzer\n");
627 return AnalyzeBitcode();