| //===-- 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/ADT/OwningPtr.h" |
| #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/Format.h" |
| #include "llvm/Support/ManagedStatic.h" |
| #include "llvm/Support/MemoryBuffer.h" |
| #include "llvm/Support/PrettyStackTrace.h" |
| #include "llvm/Support/raw_ostream.h" |
| #include "llvm/Support/Signals.h" |
| #include "llvm/Support/system_error.h" |
| #include <cstdio> |
| #include <map> |
| #include <algorithm> |
| using namespace llvm; |
| |
| static cl::opt<std::string> |
| InputFilename(cl::Positional, cl::desc("<input bitcode>"), cl::init("-")); |
| |
| 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 numeric info in dump even if" |
| " symbolic info is available")); |
| |
| namespace { |
| |
| /// CurStreamTypeType - A type for CurStreamType |
| enum CurStreamTypeType { |
| UnknownBitstream, |
| LLVMIRBitstream |
| }; |
| |
| } |
| |
| /// CurStreamType - If we can sniff the flavor of this stream, we can produce |
| /// better dump info. |
| static CurStreamTypeType 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_OLD: return "TYPE_BLOCK_ID_OLD"; |
| case bitc::TYPE_BLOCK_ID_NEW: return "TYPE_BLOCK_ID"; |
| case bitc::CONSTANTS_BLOCK_ID: return "CONSTANTS_BLOCK"; |
| case bitc::FUNCTION_BLOCK_ID: return "FUNCTION_BLOCK"; |
| case bitc::TYPE_SYMTAB_BLOCK_ID_OLD: return "TYPE_SYMTAB_OLD"; |
| case bitc::VALUE_SYMTAB_BLOCK_ID: return "VALUE_SYMTAB"; |
| case bitc::METADATA_BLOCK_ID: return "METADATA_BLOCK"; |
| case bitc::METADATA_ATTACHMENT_ID: return "METADATA_ATTACHMENT_BLOCK"; |
| } |
| } |
| |
| /// 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_OLD: |
| case bitc::TYPE_BLOCK_ID_NEW: |
| 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_OLD: return "STRUCT_OLD"; |
| 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::TYPE_CODE_STRUCT_ANON: return "STRUCT_ANON"; |
| case bitc::TYPE_CODE_STRUCT_NAME: return "STRUCT_NAME"; |
| case bitc::TYPE_CODE_STRUCT_NAMED: return "STRUCT_NAMED"; |
| } |
| |
| 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_INBOUNDS_GEP: return "CE_INBOUNDS_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::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_INBOUNDS_GEP: return "INST_INBOUNDS_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_ALLOCA: return "INST_ALLOCA"; |
| case bitc::FUNC_CODE_INST_LOAD: return "INST_LOAD"; |
| case bitc::FUNC_CODE_INST_VAARG: return "INST_VAARG"; |
| case bitc::FUNC_CODE_INST_STORE: return "INST_STORE"; |
| 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::FUNC_CODE_DEBUG_LOC_AGAIN: return "DEBUG_LOC_AGAIN"; |
| case bitc::FUNC_CODE_INST_CALL: return "INST_CALL"; |
| case bitc::FUNC_CODE_DEBUG_LOC: return "DEBUG_LOC"; |
| } |
| case bitc::TYPE_SYMTAB_BLOCK_ID_OLD: |
| 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"; |
| } |
| case bitc::METADATA_ATTACHMENT_ID: |
| switch(CodeID) { |
| default:return 0; |
| case bitc::METADATA_ATTACHMENT: return "METADATA_ATTACHMENT"; |
| } |
| case bitc::METADATA_BLOCK_ID: |
| switch(CodeID) { |
| default:return 0; |
| case bitc::METADATA_STRING: return "METADATA_STRING"; |
| case bitc::METADATA_NAME: return "METADATA_NAME"; |
| case bitc::METADATA_KIND: return "METADATA_KIND"; |
| case bitc::METADATA_NODE: return "METADATA_NODE"; |
| case bitc::METADATA_FN_NODE: return "METADATA_FN_NODE"; |
| case bitc::METADATA_NAMED_NODE: return "METADATA_NAMED_NODE"; |
| } |
| } |
| } |
| |
| 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) { |
| errs() << 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) errs() << 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) { |
| errs() << Indent << "<"; |
| if ((BlockName = GetBlockName(BlockID, *Stream.getBitStreamReader()))) |
| errs() << BlockName; |
| else |
| errs() << "UnknownBlock" << BlockID; |
| |
| if (NonSymbolic && BlockName) |
| errs() << " BlockID=" << BlockID; |
| |
| errs() << " 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) { |
| errs() << Indent << "</"; |
| if (BlockName) |
| errs() << BlockName << ">\n"; |
| else |
| errs() << "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) { |
| errs() << Indent << " <"; |
| if (const char *CodeName = |
| GetCodeName(Code, BlockID, *Stream.getBitStreamReader())) |
| errs() << CodeName; |
| else |
| errs() << "UnknownCode" << Code; |
| if (NonSymbolic && |
| GetCodeName(Code, BlockID, *Stream.getBitStreamReader())) |
| errs() << " codeid=" << Code; |
| if (AbbrevID != bitc::UNABBREV_RECORD) |
| errs() << " abbrevid=" << AbbrevID; |
| |
| for (unsigned i = 0, e = Record.size(); i != e; ++i) |
| errs() << " op" << i << "=" << (int64_t)Record[i]; |
| |
| errs() << "/>"; |
| |
| if (BlobStart) { |
| errs() << " blob data = "; |
| bool BlobIsPrintable = true; |
| for (unsigned i = 0; i != BlobLen; ++i) |
| if (!isprint(BlobStart[i])) { |
| BlobIsPrintable = false; |
| break; |
| } |
| |
| if (BlobIsPrintable) |
| errs() << "'" << std::string(BlobStart, BlobStart+BlobLen) <<"'"; |
| else |
| errs() << "unprintable, " << BlobLen << " bytes."; |
| } |
| |
| errs() << "\n"; |
| } |
| |
| break; |
| } |
| } |
| } |
| |
| static void PrintSize(double Bits) { |
| fprintf(stderr, "%.2f/%.2fB/%luW", Bits, Bits/8,(unsigned long)(Bits/32)); |
| } |
| static void PrintSize(uint64_t Bits) { |
| fprintf(stderr, "%lub/%.2fB/%luW", (unsigned long)Bits, |
| (double)Bits/8, (unsigned long)(Bits/32)); |
| } |
| |
| |
| /// AnalyzeBitcode - Analyze the bitcode file specified by InputFilename. |
| static int AnalyzeBitcode() { |
| // Read the input file. |
| OwningPtr<MemoryBuffer> MemBuf; |
| |
| if (error_code ec = |
| MemoryBuffer::getFileOrSTDIN(InputFilename.c_str(), MemBuf)) |
| return Error("Error reading '" + InputFilename + "': " + ec.message()); |
| |
| 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) errs() << "\n\n"; |
| |
| uint64_t BufferSizeBits = (EndBufPtr-BufPtr)*CHAR_BIT; |
| // Print a summary of the read file. |
| errs() << "Summary of " << InputFilename << ":\n"; |
| errs() << " Total size: "; |
| PrintSize(BufferSizeBits); |
| errs() << "\n"; |
| errs() << " Stream type: "; |
| switch (CurStreamType) { |
| default: assert(0 && "Unknown bitstream type"); |
| case UnknownBitstream: errs() << "unknown\n"; break; |
| case LLVMIRBitstream: errs() << "LLVM IR\n"; break; |
| } |
| errs() << " # Toplevel Blocks: " << NumTopBlocks << "\n"; |
| errs() << "\n"; |
| |
| // Emit per-block stats. |
| errs() << "Per-block Summary:\n"; |
| for (std::map<unsigned, PerBlockIDStats>::iterator I = BlockIDStats.begin(), |
| E = BlockIDStats.end(); I != E; ++I) { |
| errs() << " Block ID #" << I->first; |
| if (const char *BlockName = GetBlockName(I->first, StreamFile)) |
| errs() << " (" << BlockName << ")"; |
| errs() << ":\n"; |
| |
| const PerBlockIDStats &Stats = I->second; |
| errs() << " Num Instances: " << Stats.NumInstances << "\n"; |
| errs() << " Total Size: "; |
| PrintSize(Stats.NumBits); |
| errs() << "\n"; |
| double pct = (Stats.NumBits * 100.0) / BufferSizeBits; |
| errs() << " Percent of file: " << format("%2.4f%%", pct) << "\n"; |
| if (Stats.NumInstances > 1) { |
| errs() << " Average Size: "; |
| PrintSize(Stats.NumBits/(double)Stats.NumInstances); |
| errs() << "\n"; |
| errs() << " Tot/Avg SubBlocks: " << Stats.NumSubBlocks << "/" |
| << Stats.NumSubBlocks/(double)Stats.NumInstances << "\n"; |
| errs() << " Tot/Avg Abbrevs: " << Stats.NumAbbrevs << "/" |
| << Stats.NumAbbrevs/(double)Stats.NumInstances << "\n"; |
| errs() << " Tot/Avg Records: " << Stats.NumRecords << "/" |
| << Stats.NumRecords/(double)Stats.NumInstances << "\n"; |
| } else { |
| errs() << " Num SubBlocks: " << Stats.NumSubBlocks << "\n"; |
| errs() << " Num Abbrevs: " << Stats.NumAbbrevs << "\n"; |
| errs() << " Num Records: " << Stats.NumRecords << "\n"; |
| } |
| if (Stats.NumRecords) { |
| double pct = (Stats.NumAbbreviatedRecords * 100.0) / Stats.NumRecords; |
| errs() << " Percent Abbrevs: " << format("%2.4f%%", pct) << "\n"; |
| } |
| errs() << "\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()); |
| |
| errs() << "\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 %9lu ", RecStats.NumInstances, |
| (unsigned 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); |
| } |
| errs() << "\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(); |
| } |
