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Diffstat (limited to 'tools/llvm-bcanalyzer/llvm-bcanalyzer.cpp')
| -rw-r--r-- | tools/llvm-bcanalyzer/llvm-bcanalyzer.cpp | 600 |
1 files changed, 600 insertions, 0 deletions
diff --git a/tools/llvm-bcanalyzer/llvm-bcanalyzer.cpp b/tools/llvm-bcanalyzer/llvm-bcanalyzer.cpp new file mode 100644 index 000000000000..b401a21ece9a --- /dev/null +++ b/tools/llvm-bcanalyzer/llvm-bcanalyzer.cpp @@ -0,0 +1,600 @@ +//===-- llvm-bcanalyzer.cpp - Bitcode Analyzer --------------------------===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +// This tool may be invoked in the following manner: +// llvm-bcanalyzer [options] - Read LLVM bitcode from stdin +// llvm-bcanalyzer [options] x.bc - Read LLVM bitcode from the x.bc file +// +// Options: +// --help - Output information about command line switches +// --dump - Dump low-level bitcode structure in readable format +// +// This tool provides analytical information about a bitcode file. It is +// intended as an aid to developers of bitcode reading and writing software. It +// produces on std::out a summary of the bitcode file that shows various +// statistics about the contents of the file. By default this information is +// detailed and contains information about individual bitcode blocks and the +// functions in the module. +// The tool is also able to print a bitcode file in a straight forward text +// format that shows the containment and relationships of the information in +// the bitcode file (-dump option). +// +//===----------------------------------------------------------------------===// + +#include "llvm/Analysis/Verifier.h" +#include "llvm/Bitcode/BitstreamReader.h" +#include "llvm/Bitcode/LLVMBitCodes.h" +#include "llvm/Bitcode/ReaderWriter.h" +#include "llvm/Support/CommandLine.h" +#include "llvm/Support/ManagedStatic.h" +#include "llvm/Support/MemoryBuffer.h" +#include "llvm/Support/PrettyStackTrace.h" +#include "llvm/System/Signals.h" +#include <map> +#include <fstream> +#include <iostream> +#include <algorithm> +using namespace llvm; + +static cl::opt<std::string> + InputFilename(cl::Positional, cl::desc("<input bitcode>"), cl::init("-")); + +static cl::opt<std::string> + OutputFilename("-o", cl::init("-"), cl::desc("<output file>")); + +static cl::opt<bool> Dump("dump", cl::desc("Dump low level bitcode trace")); + +//===----------------------------------------------------------------------===// +// Bitcode specific analysis. +//===----------------------------------------------------------------------===// + +static cl::opt<bool> NoHistogram("disable-histogram", + cl::desc("Do not print per-code histogram")); + +static cl::opt<bool> +NonSymbolic("non-symbolic", + cl::desc("Emit numberic info in dump even if" + " symbolic info is available")); + +/// CurStreamType - If we can sniff the flavor of this stream, we can produce +/// better dump info. +static enum { + UnknownBitstream, + LLVMIRBitstream +} CurStreamType; + + +/// GetBlockName - Return a symbolic block name if known, otherwise return +/// null. +static const char *GetBlockName(unsigned BlockID, + const BitstreamReader &StreamFile) { + // Standard blocks for all bitcode files. + if (BlockID < bitc::FIRST_APPLICATION_BLOCKID) { + if (BlockID == bitc::BLOCKINFO_BLOCK_ID) + return "BLOCKINFO_BLOCK"; + return 0; + } + + // Check to see if we have a blockinfo record for this block, with a name. + if (const BitstreamReader::BlockInfo *Info = + StreamFile.getBlockInfo(BlockID)) { + if (!Info->Name.empty()) + return Info->Name.c_str(); + } + + + if (CurStreamType != LLVMIRBitstream) return 0; + + switch (BlockID) { + default: return 0; + case bitc::MODULE_BLOCK_ID: return "MODULE_BLOCK"; + case bitc::PARAMATTR_BLOCK_ID: return "PARAMATTR_BLOCK"; + case bitc::TYPE_BLOCK_ID: return "TYPE_BLOCK"; + case bitc::CONSTANTS_BLOCK_ID: return "CONSTANTS_BLOCK"; + case bitc::FUNCTION_BLOCK_ID: return "FUNCTION_BLOCK"; + case bitc::TYPE_SYMTAB_BLOCK_ID: return "TYPE_SYMTAB"; + case bitc::VALUE_SYMTAB_BLOCK_ID: return "VALUE_SYMTAB"; + } +} + +/// GetCodeName - Return a symbolic code name if known, otherwise return +/// null. +static const char *GetCodeName(unsigned CodeID, unsigned BlockID, + const BitstreamReader &StreamFile) { + // Standard blocks for all bitcode files. + if (BlockID < bitc::FIRST_APPLICATION_BLOCKID) { + if (BlockID == bitc::BLOCKINFO_BLOCK_ID) { + switch (CodeID) { + default: return 0; + case bitc::BLOCKINFO_CODE_SETBID: return "SETBID"; + case bitc::BLOCKINFO_CODE_BLOCKNAME: return "BLOCKNAME"; + case bitc::BLOCKINFO_CODE_SETRECORDNAME: return "SETRECORDNAME"; + } + } + return 0; + } + + // Check to see if we have a blockinfo record for this record, with a name. + if (const BitstreamReader::BlockInfo *Info = + StreamFile.getBlockInfo(BlockID)) { + for (unsigned i = 0, e = Info->RecordNames.size(); i != e; ++i) + if (Info->RecordNames[i].first == CodeID) + return Info->RecordNames[i].second.c_str(); + } + + + if (CurStreamType != LLVMIRBitstream) return 0; + + switch (BlockID) { + default: return 0; + case bitc::MODULE_BLOCK_ID: + switch (CodeID) { + default: return 0; + case bitc::MODULE_CODE_VERSION: return "VERSION"; + case bitc::MODULE_CODE_TRIPLE: return "TRIPLE"; + case bitc::MODULE_CODE_DATALAYOUT: return "DATALAYOUT"; + case bitc::MODULE_CODE_ASM: return "ASM"; + case bitc::MODULE_CODE_SECTIONNAME: return "SECTIONNAME"; + case bitc::MODULE_CODE_DEPLIB: return "DEPLIB"; + case bitc::MODULE_CODE_GLOBALVAR: return "GLOBALVAR"; + case bitc::MODULE_CODE_FUNCTION: return "FUNCTION"; + case bitc::MODULE_CODE_ALIAS: return "ALIAS"; + case bitc::MODULE_CODE_PURGEVALS: return "PURGEVALS"; + case bitc::MODULE_CODE_GCNAME: return "GCNAME"; + } + case bitc::PARAMATTR_BLOCK_ID: + switch (CodeID) { + default: return 0; + case bitc::PARAMATTR_CODE_ENTRY: return "ENTRY"; + } + case bitc::TYPE_BLOCK_ID: + switch (CodeID) { + default: return 0; + case bitc::TYPE_CODE_NUMENTRY: return "NUMENTRY"; + case bitc::TYPE_CODE_VOID: return "VOID"; + case bitc::TYPE_CODE_FLOAT: return "FLOAT"; + case bitc::TYPE_CODE_DOUBLE: return "DOUBLE"; + case bitc::TYPE_CODE_LABEL: return "LABEL"; + case bitc::TYPE_CODE_OPAQUE: return "OPAQUE"; + case bitc::TYPE_CODE_INTEGER: return "INTEGER"; + case bitc::TYPE_CODE_POINTER: return "POINTER"; + case bitc::TYPE_CODE_FUNCTION: return "FUNCTION"; + case bitc::TYPE_CODE_STRUCT: return "STRUCT"; + case bitc::TYPE_CODE_ARRAY: return "ARRAY"; + case bitc::TYPE_CODE_VECTOR: return "VECTOR"; + case bitc::TYPE_CODE_X86_FP80: return "X86_FP80"; + case bitc::TYPE_CODE_FP128: return "FP128"; + case bitc::TYPE_CODE_PPC_FP128: return "PPC_FP128"; + case bitc::TYPE_CODE_METADATA: return "METADATA"; + } + + case bitc::CONSTANTS_BLOCK_ID: + switch (CodeID) { + default: return 0; + case bitc::CST_CODE_SETTYPE: return "SETTYPE"; + case bitc::CST_CODE_NULL: return "NULL"; + case bitc::CST_CODE_UNDEF: return "UNDEF"; + case bitc::CST_CODE_INTEGER: return "INTEGER"; + case bitc::CST_CODE_WIDE_INTEGER: return "WIDE_INTEGER"; + case bitc::CST_CODE_FLOAT: return "FLOAT"; + case bitc::CST_CODE_AGGREGATE: return "AGGREGATE"; + case bitc::CST_CODE_STRING: return "STRING"; + case bitc::CST_CODE_CSTRING: return "CSTRING"; + case bitc::CST_CODE_CE_BINOP: return "CE_BINOP"; + case bitc::CST_CODE_CE_CAST: return "CE_CAST"; + case bitc::CST_CODE_CE_GEP: return "CE_GEP"; + case bitc::CST_CODE_CE_SELECT: return "CE_SELECT"; + case bitc::CST_CODE_CE_EXTRACTELT: return "CE_EXTRACTELT"; + case bitc::CST_CODE_CE_INSERTELT: return "CE_INSERTELT"; + case bitc::CST_CODE_CE_SHUFFLEVEC: return "CE_SHUFFLEVEC"; + case bitc::CST_CODE_CE_CMP: return "CE_CMP"; + case bitc::CST_CODE_INLINEASM: return "INLINEASM"; + case bitc::CST_CODE_CE_SHUFVEC_EX: return "CE_SHUFVEC_EX"; + case bitc::CST_CODE_MDSTRING: return "MDSTRING"; + case bitc::CST_CODE_MDNODE: return "MDNODE"; + } + case bitc::FUNCTION_BLOCK_ID: + switch (CodeID) { + default: return 0; + case bitc::FUNC_CODE_DECLAREBLOCKS: return "DECLAREBLOCKS"; + + case bitc::FUNC_CODE_INST_BINOP: return "INST_BINOP"; + case bitc::FUNC_CODE_INST_CAST: return "INST_CAST"; + case bitc::FUNC_CODE_INST_GEP: return "INST_GEP"; + case bitc::FUNC_CODE_INST_SELECT: return "INST_SELECT"; + case bitc::FUNC_CODE_INST_EXTRACTELT: return "INST_EXTRACTELT"; + case bitc::FUNC_CODE_INST_INSERTELT: return "INST_INSERTELT"; + case bitc::FUNC_CODE_INST_SHUFFLEVEC: return "INST_SHUFFLEVEC"; + case bitc::FUNC_CODE_INST_CMP: return "INST_CMP"; + + case bitc::FUNC_CODE_INST_RET: return "INST_RET"; + case bitc::FUNC_CODE_INST_BR: return "INST_BR"; + case bitc::FUNC_CODE_INST_SWITCH: return "INST_SWITCH"; + case bitc::FUNC_CODE_INST_INVOKE: return "INST_INVOKE"; + case bitc::FUNC_CODE_INST_UNWIND: return "INST_UNWIND"; + case bitc::FUNC_CODE_INST_UNREACHABLE: return "INST_UNREACHABLE"; + + case bitc::FUNC_CODE_INST_PHI: return "INST_PHI"; + case bitc::FUNC_CODE_INST_MALLOC: return "INST_MALLOC"; + case bitc::FUNC_CODE_INST_FREE: return "INST_FREE"; + case bitc::FUNC_CODE_INST_ALLOCA: return "INST_ALLOCA"; + case bitc::FUNC_CODE_INST_LOAD: return "INST_LOAD"; + case bitc::FUNC_CODE_INST_STORE: return "INST_STORE"; + case bitc::FUNC_CODE_INST_CALL: return "INST_CALL"; + case bitc::FUNC_CODE_INST_VAARG: return "INST_VAARG"; + case bitc::FUNC_CODE_INST_STORE2: return "INST_STORE2"; + case bitc::FUNC_CODE_INST_GETRESULT: return "INST_GETRESULT"; + case bitc::FUNC_CODE_INST_EXTRACTVAL: return "INST_EXTRACTVAL"; + case bitc::FUNC_CODE_INST_INSERTVAL: return "INST_INSERTVAL"; + case bitc::FUNC_CODE_INST_CMP2: return "INST_CMP2"; + case bitc::FUNC_CODE_INST_VSELECT: return "INST_VSELECT"; + } + case bitc::TYPE_SYMTAB_BLOCK_ID: + switch (CodeID) { + default: return 0; + case bitc::TST_CODE_ENTRY: return "ENTRY"; + } + case bitc::VALUE_SYMTAB_BLOCK_ID: + switch (CodeID) { + default: return 0; + case bitc::VST_CODE_ENTRY: return "ENTRY"; + case bitc::VST_CODE_BBENTRY: return "BBENTRY"; + } + } +} + +struct PerRecordStats { + unsigned NumInstances; + unsigned NumAbbrev; + uint64_t TotalBits; + + PerRecordStats() : NumInstances(0), NumAbbrev(0), TotalBits(0) {} +}; + +struct PerBlockIDStats { + /// NumInstances - This the number of times this block ID has been seen. + unsigned NumInstances; + + /// NumBits - The total size in bits of all of these blocks. + uint64_t NumBits; + + /// NumSubBlocks - The total number of blocks these blocks contain. + unsigned NumSubBlocks; + + /// NumAbbrevs - The total number of abbreviations. + unsigned NumAbbrevs; + + /// NumRecords - The total number of records these blocks contain, and the + /// number that are abbreviated. + unsigned NumRecords, NumAbbreviatedRecords; + + /// CodeFreq - Keep track of the number of times we see each code. + std::vector<PerRecordStats> CodeFreq; + + PerBlockIDStats() + : NumInstances(0), NumBits(0), + NumSubBlocks(0), NumAbbrevs(0), NumRecords(0), NumAbbreviatedRecords(0) {} +}; + +static std::map<unsigned, PerBlockIDStats> BlockIDStats; + + + +/// Error - All bitcode analysis errors go through this function, making this a +/// good place to breakpoint if debugging. +static bool Error(const std::string &Err) { + std::cerr << Err << "\n"; + return true; +} + +/// ParseBlock - Read a block, updating statistics, etc. +static bool ParseBlock(BitstreamCursor &Stream, unsigned IndentLevel) { + std::string Indent(IndentLevel*2, ' '); + uint64_t BlockBitStart = Stream.GetCurrentBitNo(); + unsigned BlockID = Stream.ReadSubBlockID(); + + // Get the statistics for this BlockID. + PerBlockIDStats &BlockStats = BlockIDStats[BlockID]; + + BlockStats.NumInstances++; + + // BLOCKINFO is a special part of the stream. + if (BlockID == bitc::BLOCKINFO_BLOCK_ID) { + if (Dump) std::cerr << Indent << "<BLOCKINFO_BLOCK/>\n"; + if (Stream.ReadBlockInfoBlock()) + return Error("Malformed BlockInfoBlock"); + uint64_t BlockBitEnd = Stream.GetCurrentBitNo(); + BlockStats.NumBits += BlockBitEnd-BlockBitStart; + return false; + } + + unsigned NumWords = 0; + if (Stream.EnterSubBlock(BlockID, &NumWords)) + return Error("Malformed block record"); + + const char *BlockName = 0; + if (Dump) { + std::cerr << Indent << "<"; + if ((BlockName = GetBlockName(BlockID, *Stream.getBitStreamReader()))) + std::cerr << BlockName; + else + std::cerr << "UnknownBlock" << BlockID; + + if (NonSymbolic && BlockName) + std::cerr << " BlockID=" << BlockID; + + std::cerr << " NumWords=" << NumWords + << " BlockCodeSize=" << Stream.GetAbbrevIDWidth() << ">\n"; + } + + SmallVector<uint64_t, 64> Record; + + // Read all the records for this block. + while (1) { + if (Stream.AtEndOfStream()) + return Error("Premature end of bitstream"); + + uint64_t RecordStartBit = Stream.GetCurrentBitNo(); + + // Read the code for this record. + unsigned AbbrevID = Stream.ReadCode(); + switch (AbbrevID) { + case bitc::END_BLOCK: { + if (Stream.ReadBlockEnd()) + return Error("Error at end of block"); + uint64_t BlockBitEnd = Stream.GetCurrentBitNo(); + BlockStats.NumBits += BlockBitEnd-BlockBitStart; + if (Dump) { + std::cerr << Indent << "</"; + if (BlockName) + std::cerr << BlockName << ">\n"; + else + std::cerr << "UnknownBlock" << BlockID << ">\n"; + } + return false; + } + case bitc::ENTER_SUBBLOCK: { + uint64_t SubBlockBitStart = Stream.GetCurrentBitNo(); + if (ParseBlock(Stream, IndentLevel+1)) + return true; + ++BlockStats.NumSubBlocks; + uint64_t SubBlockBitEnd = Stream.GetCurrentBitNo(); + + // Don't include subblock sizes in the size of this block. + BlockBitStart += SubBlockBitEnd-SubBlockBitStart; + break; + } + case bitc::DEFINE_ABBREV: + Stream.ReadAbbrevRecord(); + ++BlockStats.NumAbbrevs; + break; + default: + Record.clear(); + + ++BlockStats.NumRecords; + if (AbbrevID != bitc::UNABBREV_RECORD) + ++BlockStats.NumAbbreviatedRecords; + + const char *BlobStart = 0; + unsigned BlobLen = 0; + unsigned Code = Stream.ReadRecord(AbbrevID, Record, BlobStart, BlobLen); + + + + // Increment the # occurrences of this code. + if (BlockStats.CodeFreq.size() <= Code) + BlockStats.CodeFreq.resize(Code+1); + BlockStats.CodeFreq[Code].NumInstances++; + BlockStats.CodeFreq[Code].TotalBits += + Stream.GetCurrentBitNo()-RecordStartBit; + if (AbbrevID != bitc::UNABBREV_RECORD) + BlockStats.CodeFreq[Code].NumAbbrev++; + + if (Dump) { + std::cerr << Indent << " <"; + if (const char *CodeName = + GetCodeName(Code, BlockID, *Stream.getBitStreamReader())) + std::cerr << CodeName; + else + std::cerr << "UnknownCode" << Code; + if (NonSymbolic && + GetCodeName(Code, BlockID, *Stream.getBitStreamReader())) + std::cerr << " codeid=" << Code; + if (AbbrevID != bitc::UNABBREV_RECORD) + std::cerr << " abbrevid=" << AbbrevID; + + for (unsigned i = 0, e = Record.size(); i != e; ++i) + std::cerr << " op" << i << "=" << (int64_t)Record[i]; + + std::cerr << "/>"; + + if (BlobStart) { + std::cerr << " blob data = "; + bool BlobIsPrintable = true; + for (unsigned i = 0; i != BlobLen; ++i) + if (!isprint(BlobStart[i])) { + BlobIsPrintable = false; + break; + } + + if (BlobIsPrintable) + std::cerr << "'" << std::string(BlobStart, BlobStart+BlobLen) <<"'"; + else + std::cerr << "unprintable, " << BlobLen << " bytes."; + } + + std::cerr << "\n"; + } + + break; + } + } +} + +static void PrintSize(double Bits) { + fprintf(stderr, "%.2f/%.2fB/%lluW", Bits, Bits/8,(unsigned long long)Bits/32); +} +static void PrintSize(uint64_t Bits) { + fprintf(stderr, "%llub/%.2fB/%lluW", (unsigned long long)Bits, + (double)Bits/8, (unsigned long long)Bits/32); +} + + +/// AnalyzeBitcode - Analyze the bitcode file specified by InputFilename. +static int AnalyzeBitcode() { + // Read the input file. + MemoryBuffer *MemBuf = MemoryBuffer::getFileOrSTDIN(InputFilename.c_str()); + + if (MemBuf == 0) + return Error("Error reading '" + InputFilename + "'."); + + if (MemBuf->getBufferSize() & 3) + return Error("Bitcode stream should be a multiple of 4 bytes in length"); + + unsigned char *BufPtr = (unsigned char *)MemBuf->getBufferStart(); + unsigned char *EndBufPtr = BufPtr+MemBuf->getBufferSize(); + + // If we have a wrapper header, parse it and ignore the non-bc file contents. + // The magic number is 0x0B17C0DE stored in little endian. + if (isBitcodeWrapper(BufPtr, EndBufPtr)) + if (SkipBitcodeWrapperHeader(BufPtr, EndBufPtr)) + return Error("Invalid bitcode wrapper header"); + + BitstreamReader StreamFile(BufPtr, EndBufPtr); + BitstreamCursor Stream(StreamFile); + StreamFile.CollectBlockInfoNames(); + + // Read the stream signature. + char Signature[6]; + Signature[0] = Stream.Read(8); + Signature[1] = Stream.Read(8); + Signature[2] = Stream.Read(4); + Signature[3] = Stream.Read(4); + Signature[4] = Stream.Read(4); + Signature[5] = Stream.Read(4); + + // Autodetect the file contents, if it is one we know. + CurStreamType = UnknownBitstream; + if (Signature[0] == 'B' && Signature[1] == 'C' && + Signature[2] == 0x0 && Signature[3] == 0xC && + Signature[4] == 0xE && Signature[5] == 0xD) + CurStreamType = LLVMIRBitstream; + + unsigned NumTopBlocks = 0; + + // Parse the top-level structure. We only allow blocks at the top-level. + while (!Stream.AtEndOfStream()) { + unsigned Code = Stream.ReadCode(); + if (Code != bitc::ENTER_SUBBLOCK) + return Error("Invalid record at top-level"); + + if (ParseBlock(Stream, 0)) + return true; + ++NumTopBlocks; + } + + if (Dump) std::cerr << "\n\n"; + + uint64_t BufferSizeBits = (EndBufPtr-BufPtr)*CHAR_BIT; + // Print a summary of the read file. + std::cerr << "Summary of " << InputFilename << ":\n"; + std::cerr << " Total size: "; + PrintSize(BufferSizeBits); + std::cerr << "\n"; + std::cerr << " Stream type: "; + switch (CurStreamType) { + default: assert(0 && "Unknown bitstream type"); + case UnknownBitstream: std::cerr << "unknown\n"; break; + case LLVMIRBitstream: std::cerr << "LLVM IR\n"; break; + } + std::cerr << " # Toplevel Blocks: " << NumTopBlocks << "\n"; + std::cerr << "\n"; + + // Emit per-block stats. + std::cerr << "Per-block Summary:\n"; + for (std::map<unsigned, PerBlockIDStats>::iterator I = BlockIDStats.begin(), + E = BlockIDStats.end(); I != E; ++I) { + std::cerr << " Block ID #" << I->first; + if (const char *BlockName = GetBlockName(I->first, StreamFile)) + std::cerr << " (" << BlockName << ")"; + std::cerr << ":\n"; + + const PerBlockIDStats &Stats = I->second; + std::cerr << " Num Instances: " << Stats.NumInstances << "\n"; + std::cerr << " Total Size: "; + PrintSize(Stats.NumBits); + std::cerr << "\n"; + std::cerr << " % of file: " + << Stats.NumBits/(double)BufferSizeBits*100 << "\n"; + if (Stats.NumInstances > 1) { + std::cerr << " Average Size: "; + PrintSize(Stats.NumBits/(double)Stats.NumInstances); + std::cerr << "\n"; + std::cerr << " Tot/Avg SubBlocks: " << Stats.NumSubBlocks << "/" + << Stats.NumSubBlocks/(double)Stats.NumInstances << "\n"; + std::cerr << " Tot/Avg Abbrevs: " << Stats.NumAbbrevs << "/" + << Stats.NumAbbrevs/(double)Stats.NumInstances << "\n"; + std::cerr << " Tot/Avg Records: " << Stats.NumRecords << "/" + << Stats.NumRecords/(double)Stats.NumInstances << "\n"; + } else { + std::cerr << " Num SubBlocks: " << Stats.NumSubBlocks << "\n"; + std::cerr << " Num Abbrevs: " << Stats.NumAbbrevs << "\n"; + std::cerr << " Num Records: " << Stats.NumRecords << "\n"; + } + if (Stats.NumRecords) + std::cerr << " % Abbrev Recs: " << (Stats.NumAbbreviatedRecords/ + (double)Stats.NumRecords)*100 << "\n"; + std::cerr << "\n"; + + // Print a histogram of the codes we see. + if (!NoHistogram && !Stats.CodeFreq.empty()) { + std::vector<std::pair<unsigned, unsigned> > FreqPairs; // <freq,code> + for (unsigned i = 0, e = Stats.CodeFreq.size(); i != e; ++i) + if (unsigned Freq = Stats.CodeFreq[i].NumInstances) + FreqPairs.push_back(std::make_pair(Freq, i)); + std::stable_sort(FreqPairs.begin(), FreqPairs.end()); + std::reverse(FreqPairs.begin(), FreqPairs.end()); + + std::cerr << "\tRecord Histogram:\n"; + fprintf(stderr, "\t\t Count # Bits %% Abv Record Kind\n"); + for (unsigned i = 0, e = FreqPairs.size(); i != e; ++i) { + const PerRecordStats &RecStats = Stats.CodeFreq[FreqPairs[i].second]; + + fprintf(stderr, "\t\t%7d %9llu ", RecStats.NumInstances, + (unsigned long long)RecStats.TotalBits); + + if (RecStats.NumAbbrev) + fprintf(stderr, "%7.2f ", + (double)RecStats.NumAbbrev/RecStats.NumInstances*100); + else + fprintf(stderr, " "); + + if (const char *CodeName = + GetCodeName(FreqPairs[i].second, I->first, StreamFile)) + fprintf(stderr, "%s\n", CodeName); + else + fprintf(stderr, "UnknownCode%d\n", FreqPairs[i].second); + } + std::cerr << "\n"; + + } + } + return 0; +} + + +int main(int argc, char **argv) { + // Print a stack trace if we signal out. + sys::PrintStackTraceOnErrorSignal(); + PrettyStackTraceProgram X(argc, argv); + llvm_shutdown_obj Y; // Call llvm_shutdown() on exit. + cl::ParseCommandLineOptions(argc, argv, "llvm-bcanalyzer file analyzer\n"); + + return AnalyzeBitcode(); +} |